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)
1908 /* Older elfutils strip versions could keep the section in the main
1909 executable while splitting it for the separate debug info file. */
1910 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
1911 & SEC_HAS_CONTENTS
) == 0)
1914 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1916 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1917 /* Version check. */
1918 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1921 /* Index version 1 neglected to account for .debug_types. So,
1922 if we see .debug_types, we cannot use this index. */
1923 if (dwarf2_per_objfile
->types
.asection
!= NULL
1924 && dwarf2_per_objfile
->types
.size
!= 0)
1927 else if (version
!= 2)
1930 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1931 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1933 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1936 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1937 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1943 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1944 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1945 - MAYBE_SWAP (metadata
[i
]))
1950 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1951 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1952 - MAYBE_SWAP (metadata
[i
]));
1955 map
->index_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1956 map
->index_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1957 - MAYBE_SWAP (metadata
[i
]))
1958 / (2 * sizeof (offset_type
)));
1961 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1963 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1967 && types_list_elements
1968 && !create_signatured_type_table_from_index (objfile
, types_list
,
1969 types_list_elements
))
1972 create_addrmap_from_index (objfile
, map
);
1974 dwarf2_per_objfile
->index_table
= map
;
1975 dwarf2_per_objfile
->using_index
= 1;
1980 /* A helper for the "quick" functions which sets the global
1981 dwarf2_per_objfile according to OBJFILE. */
1983 dw2_setup (struct objfile
*objfile
)
1985 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1986 gdb_assert (dwarf2_per_objfile
);
1989 /* A helper for the "quick" functions which attempts to read the line
1990 table for THIS_CU. */
1992 dw2_require_line_header (struct objfile
*objfile
,
1993 struct dwarf2_per_cu_data
*this_cu
)
1995 bfd
*abfd
= objfile
->obfd
;
1996 struct line_header
*lh
= NULL
;
1997 struct attribute
*attr
;
1998 struct cleanup
*cleanups
;
1999 struct die_info
*comp_unit_die
;
2000 struct dwarf2_section_info
* sec
;
2001 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2002 int has_children
, i
;
2003 struct dwarf2_cu cu
;
2004 unsigned int bytes_read
, buffer_size
;
2005 struct die_reader_specs reader_specs
;
2006 char *name
, *comp_dir
;
2008 if (this_cu
->v
.quick
->read_lines
)
2010 this_cu
->v
.quick
->read_lines
= 1;
2012 memset (&cu
, 0, sizeof (cu
));
2013 cu
.objfile
= objfile
;
2014 obstack_init (&cu
.comp_unit_obstack
);
2016 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2018 if (this_cu
->from_debug_types
)
2019 sec
= &dwarf2_per_objfile
->types
;
2021 sec
= &dwarf2_per_objfile
->info
;
2022 dwarf2_read_section (objfile
, sec
);
2023 buffer_size
= sec
->size
;
2024 buffer
= sec
->buffer
;
2025 info_ptr
= buffer
+ this_cu
->offset
;
2026 beg_of_comp_unit
= info_ptr
;
2028 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2029 buffer
, buffer_size
,
2032 /* Complete the cu_header. */
2033 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2034 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2037 cu
.per_cu
= this_cu
;
2039 dwarf2_read_abbrevs (abfd
, &cu
);
2040 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2042 if (this_cu
->from_debug_types
)
2043 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2044 init_cu_die_reader (&reader_specs
, &cu
);
2045 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2048 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2051 unsigned int line_offset
= DW_UNSND (attr
);
2052 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2056 do_cleanups (cleanups
);
2060 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2062 this_cu
->v
.quick
->lines
= lh
;
2064 this_cu
->v
.quick
->file_names
2065 = obstack_alloc (&objfile
->objfile_obstack
,
2066 lh
->num_file_names
* sizeof (char *));
2067 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2068 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2070 do_cleanups (cleanups
);
2073 /* A helper for the "quick" functions which computes and caches the
2074 real path for a given file name from the line table.
2075 dw2_require_line_header must have been called before this is
2078 dw2_require_full_path (struct objfile
*objfile
,
2079 struct dwarf2_per_cu_data
*per_cu
,
2082 if (!per_cu
->v
.quick
->full_names
)
2083 per_cu
->v
.quick
->full_names
2084 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2085 per_cu
->v
.quick
->lines
->num_file_names
,
2088 if (!per_cu
->v
.quick
->full_names
[index
])
2089 per_cu
->v
.quick
->full_names
[index
]
2090 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2092 return per_cu
->v
.quick
->full_names
[index
];
2095 static struct symtab
*
2096 dw2_find_last_source_symtab (struct objfile
*objfile
)
2099 dw2_setup (objfile
);
2100 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2101 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2105 dw2_forget_cached_source_info (struct objfile
*objfile
)
2109 dw2_setup (objfile
);
2110 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2111 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2113 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2115 if (per_cu
->v
.quick
->full_names
)
2119 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2120 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2126 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2127 const char *full_path
, const char *real_path
,
2128 struct symtab
**result
)
2131 int check_basename
= lbasename (name
) == name
;
2132 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2134 dw2_setup (objfile
);
2135 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2136 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2139 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2141 if (per_cu
->v
.quick
->symtab
)
2144 dw2_require_line_header (objfile
, per_cu
);
2145 if (!per_cu
->v
.quick
->lines
)
2148 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2150 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2152 if (FILENAME_CMP (name
, this_name
) == 0)
2154 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2158 if (check_basename
&& ! base_cu
2159 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2162 if (full_path
!= NULL
)
2164 const char *this_full_name
= dw2_require_full_path (objfile
,
2168 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2170 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2175 if (real_path
!= NULL
)
2177 const char *this_full_name
= dw2_require_full_path (objfile
,
2180 if (this_full_name
!= NULL
)
2182 char *rp
= gdb_realpath (this_full_name
);
2183 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
2186 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2197 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2204 static struct symtab
*
2205 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2206 const char *name
, domain_enum domain
)
2208 /* We do all the work in the pre_expand_symtabs_matching hook
2213 /* A helper function that expands all symtabs that hold an object
2216 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2218 dw2_setup (objfile
);
2220 if (dwarf2_per_objfile
->index_table
)
2224 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2227 offset_type i
, len
= MAYBE_SWAP (*vec
);
2228 for (i
= 0; i
< len
; ++i
)
2230 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2231 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2233 dw2_instantiate_symtab (objfile
, per_cu
);
2240 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2241 int kind
, const char *name
,
2244 dw2_do_expand_symtabs_matching (objfile
, name
);
2248 dw2_print_stats (struct objfile
*objfile
)
2252 dw2_setup (objfile
);
2254 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2255 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2257 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2259 if (!per_cu
->v
.quick
->symtab
)
2262 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2266 dw2_dump (struct objfile
*objfile
)
2268 /* Nothing worth printing. */
2272 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2273 struct section_offsets
*delta
)
2275 /* There's nothing to relocate here. */
2279 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2280 const char *func_name
)
2282 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2286 dw2_expand_all_symtabs (struct objfile
*objfile
)
2290 dw2_setup (objfile
);
2292 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2293 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2295 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2297 dw2_instantiate_symtab (objfile
, per_cu
);
2302 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2303 const char *filename
)
2307 dw2_setup (objfile
);
2308 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2309 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2312 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2314 if (per_cu
->v
.quick
->symtab
)
2317 dw2_require_line_header (objfile
, per_cu
);
2318 if (!per_cu
->v
.quick
->lines
)
2321 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2323 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2324 if (strcmp (this_name
, filename
) == 0)
2326 dw2_instantiate_symtab (objfile
, per_cu
);
2334 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2336 struct dwarf2_per_cu_data
*per_cu
;
2339 dw2_setup (objfile
);
2341 if (!dwarf2_per_objfile
->index_table
)
2344 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2348 /* Note that this just looks at the very first one named NAME -- but
2349 actually we are looking for a function. find_main_filename
2350 should be rewritten so that it doesn't require a custom hook. It
2351 could just use the ordinary symbol tables. */
2352 /* vec[0] is the length, which must always be >0. */
2353 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2355 dw2_require_line_header (objfile
, per_cu
);
2356 if (!per_cu
->v
.quick
->lines
)
2359 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2363 dw2_map_ada_symtabs (struct objfile
*objfile
,
2364 int (*wild_match
) (const char *, int, const char *),
2365 int (*is_name_suffix
) (const char *),
2366 void (*callback
) (struct objfile
*,
2367 struct symtab
*, void *),
2368 const char *name
, int global
,
2369 domain_enum
namespace, int wild
,
2372 /* For now, we don't support Ada. Still the function can be called if the
2373 current language is Ada for a non-Ada objfile using GNU index. As Ada
2374 does not look for non-Ada symbols this function should just return. */
2378 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2379 int (*file_matcher
) (const char *, void *),
2380 int (*name_matcher
) (const char *, void *),
2387 dw2_setup (objfile
);
2388 if (!dwarf2_per_objfile
->index_table
)
2391 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2392 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2395 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2397 per_cu
->v
.quick
->mark
= 0;
2398 if (per_cu
->v
.quick
->symtab
)
2401 dw2_require_line_header (objfile
, per_cu
);
2402 if (!per_cu
->v
.quick
->lines
)
2405 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2407 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2409 per_cu
->v
.quick
->mark
= 1;
2416 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2419 offset_type idx
= 2 * iter
;
2421 offset_type
*vec
, vec_len
, vec_idx
;
2423 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2424 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2427 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2428 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2430 if (! (*name_matcher
) (name
, data
))
2433 /* The name was matched, now expand corresponding CUs that were
2435 vec
= (offset_type
*) (dwarf2_per_objfile
->index_table
->constant_pool
2436 + dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1]);
2437 vec_len
= MAYBE_SWAP (vec
[0]);
2438 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2440 struct dwarf2_per_cu_data
*per_cu
;
2442 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2443 if (per_cu
->v
.quick
->mark
)
2444 dw2_instantiate_symtab (objfile
, per_cu
);
2449 static struct symtab
*
2450 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2451 struct minimal_symbol
*msymbol
,
2453 struct obj_section
*section
,
2456 struct dwarf2_per_cu_data
*data
;
2458 dw2_setup (objfile
);
2460 if (!objfile
->psymtabs_addrmap
)
2463 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2467 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2468 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2469 paddress (get_objfile_arch (objfile
), pc
));
2471 return dw2_instantiate_symtab (objfile
, data
);
2475 dw2_map_symbol_names (struct objfile
*objfile
,
2476 void (*fun
) (const char *, void *),
2480 dw2_setup (objfile
);
2482 if (!dwarf2_per_objfile
->index_table
)
2486 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2489 offset_type idx
= 2 * iter
;
2491 offset_type
*vec
, vec_len
, vec_idx
;
2493 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2494 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2497 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2498 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2500 (*fun
) (name
, data
);
2505 dw2_map_symbol_filenames (struct objfile
*objfile
,
2506 void (*fun
) (const char *, const char *, void *),
2511 dw2_setup (objfile
);
2512 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2513 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2516 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2518 if (per_cu
->v
.quick
->symtab
)
2521 dw2_require_line_header (objfile
, per_cu
);
2522 if (!per_cu
->v
.quick
->lines
)
2525 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2527 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2529 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2535 dw2_has_symbols (struct objfile
*objfile
)
2540 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2543 dw2_find_last_source_symtab
,
2544 dw2_forget_cached_source_info
,
2547 dw2_pre_expand_symtabs_matching
,
2551 dw2_expand_symtabs_for_function
,
2552 dw2_expand_all_symtabs
,
2553 dw2_expand_symtabs_with_filename
,
2554 dw2_find_symbol_file
,
2555 dw2_map_ada_symtabs
,
2556 dw2_expand_symtabs_matching
,
2557 dw2_find_pc_sect_symtab
,
2558 dw2_map_symbol_names
,
2559 dw2_map_symbol_filenames
2562 /* Initialize for reading DWARF for this objfile. Return 0 if this
2563 file will use psymtabs, or 1 if using the GNU index. */
2566 dwarf2_initialize_objfile (struct objfile
*objfile
)
2568 /* If we're about to read full symbols, don't bother with the
2569 indices. In this case we also don't care if some other debug
2570 format is making psymtabs, because they are all about to be
2572 if ((objfile
->flags
& OBJF_READNOW
))
2576 dwarf2_per_objfile
->using_index
= 1;
2577 create_all_comp_units (objfile
);
2578 create_debug_types_hash_table (objfile
);
2580 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2581 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2583 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2585 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2586 struct dwarf2_per_cu_quick_data
);
2589 /* Return 1 so that gdb sees the "quick" functions. However,
2590 these functions will be no-ops because we will have expanded
2595 if (dwarf2_read_index (objfile
))
2598 dwarf2_build_psymtabs (objfile
);
2604 /* Build a partial symbol table. */
2607 dwarf2_build_psymtabs (struct objfile
*objfile
)
2609 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2611 init_psymbol_list (objfile
, 1024);
2614 dwarf2_build_psymtabs_hard (objfile
);
2617 /* Return TRUE if OFFSET is within CU_HEADER. */
2620 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2622 unsigned int bottom
= cu_header
->offset
;
2623 unsigned int top
= (cu_header
->offset
2625 + cu_header
->initial_length_size
);
2627 return (offset
>= bottom
&& offset
< top
);
2630 /* Read in the comp unit header information from the debug_info at info_ptr.
2631 NOTE: This leaves members offset, first_die_offset to be filled in
2635 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2636 gdb_byte
*info_ptr
, bfd
*abfd
)
2639 unsigned int bytes_read
;
2641 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2642 cu_header
->initial_length_size
= bytes_read
;
2643 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2644 info_ptr
+= bytes_read
;
2645 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2647 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2649 info_ptr
+= bytes_read
;
2650 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2652 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2653 if (signed_addr
< 0)
2654 internal_error (__FILE__
, __LINE__
,
2655 _("read_comp_unit_head: dwarf from non elf file"));
2656 cu_header
->signed_addr_p
= signed_addr
;
2662 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2663 gdb_byte
*buffer
, unsigned int buffer_size
,
2666 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2668 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2670 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2671 error (_("Dwarf Error: wrong version in compilation unit header "
2672 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2673 bfd_get_filename (abfd
));
2675 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2676 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2677 "(offset 0x%lx + 6) [in module %s]"),
2678 (long) header
->abbrev_offset
,
2679 (long) (beg_of_comp_unit
- buffer
),
2680 bfd_get_filename (abfd
));
2682 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2683 > buffer
+ buffer_size
)
2684 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2685 "(offset 0x%lx + 0) [in module %s]"),
2686 (long) header
->length
,
2687 (long) (beg_of_comp_unit
- buffer
),
2688 bfd_get_filename (abfd
));
2693 /* Read in the types comp unit header information from .debug_types entry at
2694 types_ptr. The result is a pointer to one past the end of the header. */
2697 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2698 ULONGEST
*signature
,
2699 gdb_byte
*types_ptr
, bfd
*abfd
)
2701 gdb_byte
*initial_types_ptr
= types_ptr
;
2703 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2704 &dwarf2_per_objfile
->types
);
2705 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2707 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2709 *signature
= read_8_bytes (abfd
, types_ptr
);
2711 types_ptr
+= cu_header
->offset_size
;
2712 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2717 /* Allocate a new partial symtab for file named NAME and mark this new
2718 partial symtab as being an include of PST. */
2721 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2722 struct objfile
*objfile
)
2724 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2726 subpst
->section_offsets
= pst
->section_offsets
;
2727 subpst
->textlow
= 0;
2728 subpst
->texthigh
= 0;
2730 subpst
->dependencies
= (struct partial_symtab
**)
2731 obstack_alloc (&objfile
->objfile_obstack
,
2732 sizeof (struct partial_symtab
*));
2733 subpst
->dependencies
[0] = pst
;
2734 subpst
->number_of_dependencies
= 1;
2736 subpst
->globals_offset
= 0;
2737 subpst
->n_global_syms
= 0;
2738 subpst
->statics_offset
= 0;
2739 subpst
->n_static_syms
= 0;
2740 subpst
->symtab
= NULL
;
2741 subpst
->read_symtab
= pst
->read_symtab
;
2744 /* No private part is necessary for include psymtabs. This property
2745 can be used to differentiate between such include psymtabs and
2746 the regular ones. */
2747 subpst
->read_symtab_private
= NULL
;
2750 /* Read the Line Number Program data and extract the list of files
2751 included by the source file represented by PST. Build an include
2752 partial symtab for each of these included files. */
2755 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2756 struct die_info
*die
,
2757 struct partial_symtab
*pst
)
2759 struct objfile
*objfile
= cu
->objfile
;
2760 bfd
*abfd
= objfile
->obfd
;
2761 struct line_header
*lh
= NULL
;
2762 struct attribute
*attr
;
2764 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2767 unsigned int line_offset
= DW_UNSND (attr
);
2769 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2772 return; /* No linetable, so no includes. */
2774 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2775 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2777 free_line_header (lh
);
2781 hash_type_signature (const void *item
)
2783 const struct signatured_type
*type_sig
= item
;
2785 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2786 return type_sig
->signature
;
2790 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2792 const struct signatured_type
*lhs
= item_lhs
;
2793 const struct signatured_type
*rhs
= item_rhs
;
2795 return lhs
->signature
== rhs
->signature
;
2798 /* Allocate a hash table for signatured types. */
2801 allocate_signatured_type_table (struct objfile
*objfile
)
2803 return htab_create_alloc_ex (41,
2804 hash_type_signature
,
2807 &objfile
->objfile_obstack
,
2808 hashtab_obstack_allocate
,
2809 dummy_obstack_deallocate
);
2812 /* A helper function to add a signatured type CU to a list. */
2815 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2817 struct signatured_type
*sigt
= *slot
;
2818 struct dwarf2_per_cu_data
***datap
= datum
;
2820 **datap
= &sigt
->per_cu
;
2826 /* Create the hash table of all entries in the .debug_types section.
2827 The result is zero if there is an error (e.g. missing .debug_types section),
2828 otherwise non-zero. */
2831 create_debug_types_hash_table (struct objfile
*objfile
)
2835 struct dwarf2_per_cu_data
**iter
;
2837 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2838 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2840 if (info_ptr
== NULL
)
2842 dwarf2_per_objfile
->signatured_types
= NULL
;
2846 types_htab
= allocate_signatured_type_table (objfile
);
2848 if (dwarf2_die_debug
)
2849 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2851 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2853 unsigned int offset
;
2854 unsigned int offset_size
;
2855 unsigned int type_offset
;
2856 unsigned int length
, initial_length_size
;
2857 unsigned short version
;
2859 struct signatured_type
*type_sig
;
2861 gdb_byte
*ptr
= info_ptr
;
2863 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2865 /* We need to read the type's signature in order to build the hash
2866 table, but we don't need to read anything else just yet. */
2868 /* Sanity check to ensure entire cu is present. */
2869 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2870 if (ptr
+ length
+ initial_length_size
2871 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2873 complaint (&symfile_complaints
,
2874 _("debug type entry runs off end of `.debug_types' section, ignored"));
2878 offset_size
= initial_length_size
== 4 ? 4 : 8;
2879 ptr
+= initial_length_size
;
2880 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2882 ptr
+= offset_size
; /* abbrev offset */
2883 ptr
+= 1; /* address size */
2884 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2886 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2888 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2889 memset (type_sig
, 0, sizeof (*type_sig
));
2890 type_sig
->signature
= signature
;
2891 type_sig
->offset
= offset
;
2892 type_sig
->type_offset
= type_offset
;
2893 type_sig
->per_cu
.objfile
= objfile
;
2894 type_sig
->per_cu
.from_debug_types
= 1;
2896 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2897 gdb_assert (slot
!= NULL
);
2900 if (dwarf2_die_debug
)
2901 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2902 offset
, phex (signature
, sizeof (signature
)));
2904 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2907 dwarf2_per_objfile
->signatured_types
= types_htab
;
2909 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2910 dwarf2_per_objfile
->type_comp_units
2911 = obstack_alloc (&objfile
->objfile_obstack
,
2912 dwarf2_per_objfile
->n_type_comp_units
2913 * sizeof (struct dwarf2_per_cu_data
*));
2914 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2915 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2916 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2917 == dwarf2_per_objfile
->n_type_comp_units
);
2922 /* Lookup a signature based type.
2923 Returns NULL if SIG is not present in the table. */
2925 static struct signatured_type
*
2926 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2928 struct signatured_type find_entry
, *entry
;
2930 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2932 complaint (&symfile_complaints
,
2933 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2937 find_entry
.signature
= sig
;
2938 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2942 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2945 init_cu_die_reader (struct die_reader_specs
*reader
,
2946 struct dwarf2_cu
*cu
)
2948 reader
->abfd
= cu
->objfile
->obfd
;
2950 if (cu
->per_cu
->from_debug_types
)
2952 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2953 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2957 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2958 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2962 /* Find the base address of the compilation unit for range lists and
2963 location lists. It will normally be specified by DW_AT_low_pc.
2964 In DWARF-3 draft 4, the base address could be overridden by
2965 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2966 compilation units with discontinuous ranges. */
2969 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2971 struct attribute
*attr
;
2974 cu
->base_address
= 0;
2976 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
2979 cu
->base_address
= DW_ADDR (attr
);
2984 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
2987 cu
->base_address
= DW_ADDR (attr
);
2993 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2994 to combine the common parts.
2995 Process a compilation unit for a psymtab.
2996 BUFFER is a pointer to the beginning of the dwarf section buffer,
2997 either .debug_info or debug_types.
2998 INFO_PTR is a pointer to the start of the CU.
2999 Returns a pointer to the next CU. */
3002 process_psymtab_comp_unit (struct objfile
*objfile
,
3003 struct dwarf2_per_cu_data
*this_cu
,
3004 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3005 unsigned int buffer_size
)
3007 bfd
*abfd
= objfile
->obfd
;
3008 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3009 struct die_info
*comp_unit_die
;
3010 struct partial_symtab
*pst
;
3012 struct cleanup
*back_to_inner
;
3013 struct dwarf2_cu cu
;
3014 int has_children
, has_pc_info
;
3015 struct attribute
*attr
;
3016 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3017 struct die_reader_specs reader_specs
;
3019 memset (&cu
, 0, sizeof (cu
));
3020 cu
.objfile
= objfile
;
3021 obstack_init (&cu
.comp_unit_obstack
);
3023 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3025 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3026 buffer
, buffer_size
,
3029 /* Complete the cu_header. */
3030 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3031 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3033 cu
.list_in_scope
= &file_symbols
;
3035 /* If this compilation unit was already read in, free the
3036 cached copy in order to read it in again. This is
3037 necessary because we skipped some symbols when we first
3038 read in the compilation unit (see load_partial_dies).
3039 This problem could be avoided, but the benefit is
3041 if (this_cu
->cu
!= NULL
)
3042 free_one_cached_comp_unit (this_cu
->cu
);
3044 /* Note that this is a pointer to our stack frame, being
3045 added to a global data structure. It will be cleaned up
3046 in free_stack_comp_unit when we finish with this
3047 compilation unit. */
3049 cu
.per_cu
= this_cu
;
3051 /* Read the abbrevs for this compilation unit into a table. */
3052 dwarf2_read_abbrevs (abfd
, &cu
);
3053 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3055 /* Read the compilation unit die. */
3056 if (this_cu
->from_debug_types
)
3057 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3058 init_cu_die_reader (&reader_specs
, &cu
);
3059 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3062 if (this_cu
->from_debug_types
)
3064 /* offset,length haven't been set yet for type units. */
3065 this_cu
->offset
= cu
.header
.offset
;
3066 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3068 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3070 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3071 + cu
.header
.initial_length_size
);
3072 do_cleanups (back_to_inner
);
3076 /* Set the language we're debugging. */
3077 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
3079 set_cu_language (DW_UNSND (attr
), &cu
);
3081 set_cu_language (language_minimal
, &cu
);
3083 /* Allocate a new partial symbol table structure. */
3084 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3085 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3086 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3087 /* TEXTLOW and TEXTHIGH are set below. */
3089 objfile
->global_psymbols
.next
,
3090 objfile
->static_psymbols
.next
);
3092 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3094 pst
->dirname
= DW_STRING (attr
);
3096 pst
->read_symtab_private
= this_cu
;
3098 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3100 /* Store the function that reads in the rest of the symbol table */
3101 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3103 this_cu
->v
.psymtab
= pst
;
3105 dwarf2_find_base_address (comp_unit_die
, &cu
);
3107 /* Possibly set the default values of LOWPC and HIGHPC from
3109 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3110 &best_highpc
, &cu
, pst
);
3111 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3112 /* Store the contiguous range if it is not empty; it can be empty for
3113 CUs with no code. */
3114 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3115 best_lowpc
+ baseaddr
,
3116 best_highpc
+ baseaddr
- 1, pst
);
3118 /* Check if comp unit has_children.
3119 If so, read the rest of the partial symbols from this comp unit.
3120 If not, there's no more debug_info for this comp unit. */
3123 struct partial_die_info
*first_die
;
3124 CORE_ADDR lowpc
, highpc
;
3126 lowpc
= ((CORE_ADDR
) -1);
3127 highpc
= ((CORE_ADDR
) 0);
3129 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3131 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3132 ! has_pc_info
, &cu
);
3134 /* If we didn't find a lowpc, set it to highpc to avoid
3135 complaints from `maint check'. */
3136 if (lowpc
== ((CORE_ADDR
) -1))
3139 /* If the compilation unit didn't have an explicit address range,
3140 then use the information extracted from its child dies. */
3144 best_highpc
= highpc
;
3147 pst
->textlow
= best_lowpc
+ baseaddr
;
3148 pst
->texthigh
= best_highpc
+ baseaddr
;
3150 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3151 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3152 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3153 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3154 sort_pst_symbols (pst
);
3156 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3157 + cu
.header
.initial_length_size
);
3159 if (this_cu
->from_debug_types
)
3161 /* It's not clear we want to do anything with stmt lists here.
3162 Waiting to see what gcc ultimately does. */
3166 /* Get the list of files included in the current compilation unit,
3167 and build a psymtab for each of them. */
3168 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3171 do_cleanups (back_to_inner
);
3176 /* Traversal function for htab_traverse_noresize.
3177 Process one .debug_types comp-unit. */
3180 process_type_comp_unit (void **slot
, void *info
)
3182 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3183 struct objfile
*objfile
= (struct objfile
*) info
;
3184 struct dwarf2_per_cu_data
*this_cu
;
3186 this_cu
= &entry
->per_cu
;
3188 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3189 process_psymtab_comp_unit (objfile
, this_cu
,
3190 dwarf2_per_objfile
->types
.buffer
,
3191 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3192 dwarf2_per_objfile
->types
.size
);
3197 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3198 Build partial symbol tables for the .debug_types comp-units. */
3201 build_type_psymtabs (struct objfile
*objfile
)
3203 if (! create_debug_types_hash_table (objfile
))
3206 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3207 process_type_comp_unit
, objfile
);
3210 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3213 psymtabs_addrmap_cleanup (void *o
)
3215 struct objfile
*objfile
= o
;
3217 objfile
->psymtabs_addrmap
= NULL
;
3220 /* Build the partial symbol table by doing a quick pass through the
3221 .debug_info and .debug_abbrev sections. */
3224 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3227 struct cleanup
*back_to
, *addrmap_cleanup
;
3228 struct obstack temp_obstack
;
3230 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3232 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3233 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3235 /* Any cached compilation units will be linked by the per-objfile
3236 read_in_chain. Make sure to free them when we're done. */
3237 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3239 build_type_psymtabs (objfile
);
3241 create_all_comp_units (objfile
);
3243 /* Create a temporary address map on a temporary obstack. We later
3244 copy this to the final obstack. */
3245 obstack_init (&temp_obstack
);
3246 make_cleanup_obstack_free (&temp_obstack
);
3247 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3248 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3250 /* Since the objects we're extracting from .debug_info vary in
3251 length, only the individual functions to extract them (like
3252 read_comp_unit_head and load_partial_die) can really know whether
3253 the buffer is large enough to hold another complete object.
3255 At the moment, they don't actually check that. If .debug_info
3256 holds just one extra byte after the last compilation unit's dies,
3257 then read_comp_unit_head will happily read off the end of the
3258 buffer. read_partial_die is similarly casual. Those functions
3261 For this loop condition, simply checking whether there's any data
3262 left at all should be sufficient. */
3264 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3265 + dwarf2_per_objfile
->info
.size
))
3267 struct dwarf2_per_cu_data
*this_cu
;
3269 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3272 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3273 dwarf2_per_objfile
->info
.buffer
,
3275 dwarf2_per_objfile
->info
.size
);
3278 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3279 &objfile
->objfile_obstack
);
3280 discard_cleanups (addrmap_cleanup
);
3282 do_cleanups (back_to
);
3285 /* Load the partial DIEs for a secondary CU into memory. */
3288 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3289 struct objfile
*objfile
)
3291 bfd
*abfd
= objfile
->obfd
;
3292 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3293 struct die_info
*comp_unit_die
;
3294 struct dwarf2_cu
*cu
;
3295 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3296 struct attribute
*attr
;
3298 struct die_reader_specs reader_specs
;
3301 gdb_assert (! this_cu
->from_debug_types
);
3303 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3304 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3305 beg_of_comp_unit
= info_ptr
;
3307 if (this_cu
->cu
== NULL
)
3309 cu
= alloc_one_comp_unit (objfile
);
3313 /* If an error occurs while loading, release our storage. */
3314 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3316 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3317 dwarf2_per_objfile
->info
.buffer
,
3318 dwarf2_per_objfile
->info
.size
,
3321 /* Complete the cu_header. */
3322 cu
->header
.offset
= this_cu
->offset
;
3323 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3325 /* Link this compilation unit into the compilation unit tree. */
3327 cu
->per_cu
= this_cu
;
3329 /* Link this CU into read_in_chain. */
3330 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3331 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3336 info_ptr
+= cu
->header
.first_die_offset
;
3339 /* Read the abbrevs for this compilation unit into a table. */
3340 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3341 dwarf2_read_abbrevs (abfd
, cu
);
3342 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3344 /* Read the compilation unit die. */
3345 init_cu_die_reader (&reader_specs
, cu
);
3346 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3349 /* Set the language we're debugging. */
3350 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
3352 set_cu_language (DW_UNSND (attr
), cu
);
3354 set_cu_language (language_minimal
, cu
);
3356 /* Check if comp unit has_children.
3357 If so, read the rest of the partial symbols from this comp unit.
3358 If not, there's no more debug_info for this comp unit. */
3360 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3362 do_cleanups (free_abbrevs_cleanup
);
3366 /* We've successfully allocated this compilation unit. Let our
3367 caller clean it up when finished with it. */
3368 discard_cleanups (free_cu_cleanup
);
3372 /* Create a list of all compilation units in OBJFILE. We do this only
3373 if an inter-comp-unit reference is found; presumably if there is one,
3374 there will be many, and one will occur early in the .debug_info section.
3375 So there's no point in building this list incrementally. */
3378 create_all_comp_units (struct objfile
*objfile
)
3382 struct dwarf2_per_cu_data
**all_comp_units
;
3385 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3386 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3390 all_comp_units
= xmalloc (n_allocated
3391 * sizeof (struct dwarf2_per_cu_data
*));
3393 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3395 unsigned int length
, initial_length_size
;
3396 struct dwarf2_per_cu_data
*this_cu
;
3397 unsigned int offset
;
3399 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3401 /* Read just enough information to find out where the next
3402 compilation unit is. */
3403 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3404 &initial_length_size
);
3406 /* Save the compilation unit for later lookup. */
3407 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3408 sizeof (struct dwarf2_per_cu_data
));
3409 memset (this_cu
, 0, sizeof (*this_cu
));
3410 this_cu
->offset
= offset
;
3411 this_cu
->length
= length
+ initial_length_size
;
3412 this_cu
->objfile
= objfile
;
3414 if (n_comp_units
== n_allocated
)
3417 all_comp_units
= xrealloc (all_comp_units
,
3419 * sizeof (struct dwarf2_per_cu_data
*));
3421 all_comp_units
[n_comp_units
++] = this_cu
;
3423 info_ptr
= info_ptr
+ this_cu
->length
;
3426 dwarf2_per_objfile
->all_comp_units
3427 = obstack_alloc (&objfile
->objfile_obstack
,
3428 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3429 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3430 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3431 xfree (all_comp_units
);
3432 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3435 /* Process all loaded DIEs for compilation unit CU, starting at
3436 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3437 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3438 DW_AT_ranges). If NEED_PC is set, then this function will set
3439 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3440 and record the covered ranges in the addrmap. */
3443 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3444 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3446 struct partial_die_info
*pdi
;
3448 /* Now, march along the PDI's, descending into ones which have
3449 interesting children but skipping the children of the other ones,
3450 until we reach the end of the compilation unit. */
3456 fixup_partial_die (pdi
, cu
);
3458 /* Anonymous namespaces or modules have no name but have interesting
3459 children, so we need to look at them. Ditto for anonymous
3462 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3463 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3467 case DW_TAG_subprogram
:
3468 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3470 case DW_TAG_variable
:
3471 case DW_TAG_typedef
:
3472 case DW_TAG_union_type
:
3473 if (!pdi
->is_declaration
)
3475 add_partial_symbol (pdi
, cu
);
3478 case DW_TAG_class_type
:
3479 case DW_TAG_interface_type
:
3480 case DW_TAG_structure_type
:
3481 if (!pdi
->is_declaration
)
3483 add_partial_symbol (pdi
, cu
);
3486 case DW_TAG_enumeration_type
:
3487 if (!pdi
->is_declaration
)
3488 add_partial_enumeration (pdi
, cu
);
3490 case DW_TAG_base_type
:
3491 case DW_TAG_subrange_type
:
3492 /* File scope base type definitions are added to the partial
3494 add_partial_symbol (pdi
, cu
);
3496 case DW_TAG_namespace
:
3497 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3500 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3507 /* If the die has a sibling, skip to the sibling. */
3509 pdi
= pdi
->die_sibling
;
3513 /* Functions used to compute the fully scoped name of a partial DIE.
3515 Normally, this is simple. For C++, the parent DIE's fully scoped
3516 name is concatenated with "::" and the partial DIE's name. For
3517 Java, the same thing occurs except that "." is used instead of "::".
3518 Enumerators are an exception; they use the scope of their parent
3519 enumeration type, i.e. the name of the enumeration type is not
3520 prepended to the enumerator.
3522 There are two complexities. One is DW_AT_specification; in this
3523 case "parent" means the parent of the target of the specification,
3524 instead of the direct parent of the DIE. The other is compilers
3525 which do not emit DW_TAG_namespace; in this case we try to guess
3526 the fully qualified name of structure types from their members'
3527 linkage names. This must be done using the DIE's children rather
3528 than the children of any DW_AT_specification target. We only need
3529 to do this for structures at the top level, i.e. if the target of
3530 any DW_AT_specification (if any; otherwise the DIE itself) does not
3533 /* Compute the scope prefix associated with PDI's parent, in
3534 compilation unit CU. The result will be allocated on CU's
3535 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3536 field. NULL is returned if no prefix is necessary. */
3538 partial_die_parent_scope (struct partial_die_info
*pdi
,
3539 struct dwarf2_cu
*cu
)
3541 char *grandparent_scope
;
3542 struct partial_die_info
*parent
, *real_pdi
;
3544 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3545 then this means the parent of the specification DIE. */
3548 while (real_pdi
->has_specification
)
3549 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3551 parent
= real_pdi
->die_parent
;
3555 if (parent
->scope_set
)
3556 return parent
->scope
;
3558 fixup_partial_die (parent
, cu
);
3560 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3562 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3563 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3564 Work around this problem here. */
3565 if (cu
->language
== language_cplus
3566 && parent
->tag
== DW_TAG_namespace
3567 && strcmp (parent
->name
, "::") == 0
3568 && grandparent_scope
== NULL
)
3570 parent
->scope
= NULL
;
3571 parent
->scope_set
= 1;
3575 if (parent
->tag
== DW_TAG_namespace
3576 || parent
->tag
== DW_TAG_module
3577 || parent
->tag
== DW_TAG_structure_type
3578 || parent
->tag
== DW_TAG_class_type
3579 || parent
->tag
== DW_TAG_interface_type
3580 || parent
->tag
== DW_TAG_union_type
3581 || parent
->tag
== DW_TAG_enumeration_type
)
3583 if (grandparent_scope
== NULL
)
3584 parent
->scope
= parent
->name
;
3586 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3587 parent
->name
, 0, cu
);
3589 else if (parent
->tag
== DW_TAG_enumerator
)
3590 /* Enumerators should not get the name of the enumeration as a prefix. */
3591 parent
->scope
= grandparent_scope
;
3594 /* FIXME drow/2004-04-01: What should we be doing with
3595 function-local names? For partial symbols, we should probably be
3597 complaint (&symfile_complaints
,
3598 _("unhandled containing DIE tag %d for DIE at %d"),
3599 parent
->tag
, pdi
->offset
);
3600 parent
->scope
= grandparent_scope
;
3603 parent
->scope_set
= 1;
3604 return parent
->scope
;
3607 /* Return the fully scoped name associated with PDI, from compilation unit
3608 CU. The result will be allocated with malloc. */
3610 partial_die_full_name (struct partial_die_info
*pdi
,
3611 struct dwarf2_cu
*cu
)
3615 /* If this is a template instantiation, we can not work out the
3616 template arguments from partial DIEs. So, unfortunately, we have
3617 to go through the full DIEs. At least any work we do building
3618 types here will be reused if full symbols are loaded later. */
3619 if (pdi
->has_template_arguments
)
3621 fixup_partial_die (pdi
, cu
);
3623 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3625 struct die_info
*die
;
3626 struct attribute attr
;
3627 struct dwarf2_cu
*ref_cu
= cu
;
3630 attr
.form
= DW_FORM_ref_addr
;
3631 attr
.u
.addr
= pdi
->offset
;
3632 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3634 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3638 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3639 if (parent_scope
== NULL
)
3642 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3646 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3648 struct objfile
*objfile
= cu
->objfile
;
3650 char *actual_name
= NULL
;
3651 const struct partial_symbol
*psym
= NULL
;
3653 int built_actual_name
= 0;
3655 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3657 actual_name
= partial_die_full_name (pdi
, cu
);
3659 built_actual_name
= 1;
3661 if (actual_name
== NULL
)
3662 actual_name
= pdi
->name
;
3666 case DW_TAG_subprogram
:
3667 if (pdi
->is_external
|| cu
->language
== language_ada
)
3669 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3670 of the global scope. But in Ada, we want to be able to access
3671 nested procedures globally. So all Ada subprograms are stored
3672 in the global scope. */
3673 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3674 mst_text, objfile); */
3675 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3677 VAR_DOMAIN
, LOC_BLOCK
,
3678 &objfile
->global_psymbols
,
3679 0, pdi
->lowpc
+ baseaddr
,
3680 cu
->language
, objfile
);
3684 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3685 mst_file_text, objfile); */
3686 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3688 VAR_DOMAIN
, LOC_BLOCK
,
3689 &objfile
->static_psymbols
,
3690 0, pdi
->lowpc
+ baseaddr
,
3691 cu
->language
, objfile
);
3694 case DW_TAG_variable
:
3696 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3700 && !dwarf2_per_objfile
->has_section_at_zero
)
3702 /* A global or static variable may also have been stripped
3703 out by the linker if unused, in which case its address
3704 will be nullified; do not add such variables into partial
3705 symbol table then. */
3707 else if (pdi
->is_external
)
3710 Don't enter into the minimal symbol tables as there is
3711 a minimal symbol table entry from the ELF symbols already.
3712 Enter into partial symbol table if it has a location
3713 descriptor or a type.
3714 If the location descriptor is missing, new_symbol will create
3715 a LOC_UNRESOLVED symbol, the address of the variable will then
3716 be determined from the minimal symbol table whenever the variable
3718 The address for the partial symbol table entry is not
3719 used by GDB, but it comes in handy for debugging partial symbol
3722 if (pdi
->locdesc
|| pdi
->has_type
)
3723 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3725 VAR_DOMAIN
, LOC_STATIC
,
3726 &objfile
->global_psymbols
,
3728 cu
->language
, objfile
);
3732 /* Static Variable. Skip symbols without location descriptors. */
3733 if (pdi
->locdesc
== NULL
)
3735 if (built_actual_name
)
3736 xfree (actual_name
);
3739 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3740 mst_file_data, objfile); */
3741 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3743 VAR_DOMAIN
, LOC_STATIC
,
3744 &objfile
->static_psymbols
,
3746 cu
->language
, objfile
);
3749 case DW_TAG_typedef
:
3750 case DW_TAG_base_type
:
3751 case DW_TAG_subrange_type
:
3752 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3754 VAR_DOMAIN
, LOC_TYPEDEF
,
3755 &objfile
->static_psymbols
,
3756 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3758 case DW_TAG_namespace
:
3759 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3761 VAR_DOMAIN
, LOC_TYPEDEF
,
3762 &objfile
->global_psymbols
,
3763 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3765 case DW_TAG_class_type
:
3766 case DW_TAG_interface_type
:
3767 case DW_TAG_structure_type
:
3768 case DW_TAG_union_type
:
3769 case DW_TAG_enumeration_type
:
3770 /* Skip external references. The DWARF standard says in the section
3771 about "Structure, Union, and Class Type Entries": "An incomplete
3772 structure, union or class type is represented by a structure,
3773 union or class entry that does not have a byte size attribute
3774 and that has a DW_AT_declaration attribute." */
3775 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3777 if (built_actual_name
)
3778 xfree (actual_name
);
3782 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3783 static vs. global. */
3784 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3786 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3787 (cu
->language
== language_cplus
3788 || cu
->language
== language_java
)
3789 ? &objfile
->global_psymbols
3790 : &objfile
->static_psymbols
,
3791 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3794 case DW_TAG_enumerator
:
3795 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3797 VAR_DOMAIN
, LOC_CONST
,
3798 (cu
->language
== language_cplus
3799 || cu
->language
== language_java
)
3800 ? &objfile
->global_psymbols
3801 : &objfile
->static_psymbols
,
3802 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3808 if (built_actual_name
)
3809 xfree (actual_name
);
3812 /* Read a partial die corresponding to a namespace; also, add a symbol
3813 corresponding to that namespace to the symbol table. NAMESPACE is
3814 the name of the enclosing namespace. */
3817 add_partial_namespace (struct partial_die_info
*pdi
,
3818 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3819 int need_pc
, struct dwarf2_cu
*cu
)
3821 /* Add a symbol for the namespace. */
3823 add_partial_symbol (pdi
, cu
);
3825 /* Now scan partial symbols in that namespace. */
3827 if (pdi
->has_children
)
3828 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3831 /* Read a partial die corresponding to a Fortran module. */
3834 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3835 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3837 /* Now scan partial symbols in that module. */
3839 if (pdi
->has_children
)
3840 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3843 /* Read a partial die corresponding to a subprogram and create a partial
3844 symbol for that subprogram. When the CU language allows it, this
3845 routine also defines a partial symbol for each nested subprogram
3846 that this subprogram contains.
3848 DIE my also be a lexical block, in which case we simply search
3849 recursively for suprograms defined inside that lexical block.
3850 Again, this is only performed when the CU language allows this
3851 type of definitions. */
3854 add_partial_subprogram (struct partial_die_info
*pdi
,
3855 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3856 int need_pc
, struct dwarf2_cu
*cu
)
3858 if (pdi
->tag
== DW_TAG_subprogram
)
3860 if (pdi
->has_pc_info
)
3862 if (pdi
->lowpc
< *lowpc
)
3863 *lowpc
= pdi
->lowpc
;
3864 if (pdi
->highpc
> *highpc
)
3865 *highpc
= pdi
->highpc
;
3869 struct objfile
*objfile
= cu
->objfile
;
3871 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3872 SECT_OFF_TEXT (objfile
));
3873 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3874 pdi
->lowpc
+ baseaddr
,
3875 pdi
->highpc
- 1 + baseaddr
,
3876 cu
->per_cu
->v
.psymtab
);
3878 if (!pdi
->is_declaration
)
3879 /* Ignore subprogram DIEs that do not have a name, they are
3880 illegal. Do not emit a complaint at this point, we will
3881 do so when we convert this psymtab into a symtab. */
3883 add_partial_symbol (pdi
, cu
);
3887 if (! pdi
->has_children
)
3890 if (cu
->language
== language_ada
)
3892 pdi
= pdi
->die_child
;
3895 fixup_partial_die (pdi
, cu
);
3896 if (pdi
->tag
== DW_TAG_subprogram
3897 || pdi
->tag
== DW_TAG_lexical_block
)
3898 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3899 pdi
= pdi
->die_sibling
;
3904 /* See if we can figure out if the class lives in a namespace. We do
3905 this by looking for a member function; its demangled name will
3906 contain namespace info, if there is any. */
3909 guess_structure_name (struct partial_die_info
*struct_pdi
,
3910 struct dwarf2_cu
*cu
)
3912 if ((cu
->language
== language_cplus
3913 || cu
->language
== language_java
)
3914 && cu
->has_namespace_info
== 0
3915 && struct_pdi
->has_children
)
3917 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3918 what template types look like, because the demangler
3919 frequently doesn't give the same name as the debug info. We
3920 could fix this by only using the demangled name to get the
3921 prefix (but see comment in read_structure_type). */
3923 struct partial_die_info
*real_pdi
;
3925 /* If this DIE (this DIE's specification, if any) has a parent, then
3926 we should not do this. We'll prepend the parent's fully qualified
3927 name when we create the partial symbol. */
3929 real_pdi
= struct_pdi
;
3930 while (real_pdi
->has_specification
)
3931 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3933 if (real_pdi
->die_parent
!= NULL
)
3938 /* Read a partial die corresponding to an enumeration type. */
3941 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3942 struct dwarf2_cu
*cu
)
3944 struct partial_die_info
*pdi
;
3946 if (enum_pdi
->name
!= NULL
)
3947 add_partial_symbol (enum_pdi
, cu
);
3949 pdi
= enum_pdi
->die_child
;
3952 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3953 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3955 add_partial_symbol (pdi
, cu
);
3956 pdi
= pdi
->die_sibling
;
3960 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3961 Return the corresponding abbrev, or NULL if the number is zero (indicating
3962 an empty DIE). In either case *BYTES_READ will be set to the length of
3963 the initial number. */
3965 static struct abbrev_info
*
3966 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3967 struct dwarf2_cu
*cu
)
3969 bfd
*abfd
= cu
->objfile
->obfd
;
3970 unsigned int abbrev_number
;
3971 struct abbrev_info
*abbrev
;
3973 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
3975 if (abbrev_number
== 0)
3978 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
3981 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
3982 bfd_get_filename (abfd
));
3988 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3989 Returns a pointer to the end of a series of DIEs, terminated by an empty
3990 DIE. Any children of the skipped DIEs will also be skipped. */
3993 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
3995 struct abbrev_info
*abbrev
;
3996 unsigned int bytes_read
;
4000 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4002 return info_ptr
+ bytes_read
;
4004 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4008 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4009 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4010 abbrev corresponding to that skipped uleb128 should be passed in
4011 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4015 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4016 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4018 unsigned int bytes_read
;
4019 struct attribute attr
;
4020 bfd
*abfd
= cu
->objfile
->obfd
;
4021 unsigned int form
, i
;
4023 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4025 /* The only abbrev we care about is DW_AT_sibling. */
4026 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4028 read_attribute (&attr
, &abbrev
->attrs
[i
],
4029 abfd
, info_ptr
, cu
);
4030 if (attr
.form
== DW_FORM_ref_addr
)
4031 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4033 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4036 /* If it isn't DW_AT_sibling, skip this attribute. */
4037 form
= abbrev
->attrs
[i
].form
;
4041 case DW_FORM_ref_addr
:
4042 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4043 and later it is offset sized. */
4044 if (cu
->header
.version
== 2)
4045 info_ptr
+= cu
->header
.addr_size
;
4047 info_ptr
+= cu
->header
.offset_size
;
4050 info_ptr
+= cu
->header
.addr_size
;
4057 case DW_FORM_flag_present
:
4072 case DW_FORM_string
:
4073 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4074 info_ptr
+= bytes_read
;
4076 case DW_FORM_sec_offset
:
4078 info_ptr
+= cu
->header
.offset_size
;
4080 case DW_FORM_exprloc
:
4082 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4083 info_ptr
+= bytes_read
;
4085 case DW_FORM_block1
:
4086 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4088 case DW_FORM_block2
:
4089 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4091 case DW_FORM_block4
:
4092 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4096 case DW_FORM_ref_udata
:
4097 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4099 case DW_FORM_indirect
:
4100 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4101 info_ptr
+= bytes_read
;
4102 /* We need to continue parsing from here, so just go back to
4104 goto skip_attribute
;
4107 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4108 dwarf_form_name (form
),
4109 bfd_get_filename (abfd
));
4113 if (abbrev
->has_children
)
4114 return skip_children (buffer
, info_ptr
, cu
);
4119 /* Locate ORIG_PDI's sibling.
4120 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4124 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4125 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4126 bfd
*abfd
, struct dwarf2_cu
*cu
)
4128 /* Do we know the sibling already? */
4130 if (orig_pdi
->sibling
)
4131 return orig_pdi
->sibling
;
4133 /* Are there any children to deal with? */
4135 if (!orig_pdi
->has_children
)
4138 /* Skip the children the long way. */
4140 return skip_children (buffer
, info_ptr
, cu
);
4143 /* Expand this partial symbol table into a full symbol table. */
4146 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4152 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4158 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4159 gdb_flush (gdb_stdout
);
4162 /* Restore our global data. */
4163 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4164 dwarf2_objfile_data_key
);
4166 /* If this psymtab is constructed from a debug-only objfile, the
4167 has_section_at_zero flag will not necessarily be correct. We
4168 can get the correct value for this flag by looking at the data
4169 associated with the (presumably stripped) associated objfile. */
4170 if (pst
->objfile
->separate_debug_objfile_backlink
)
4172 struct dwarf2_per_objfile
*dpo_backlink
4173 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4174 dwarf2_objfile_data_key
);
4176 dwarf2_per_objfile
->has_section_at_zero
4177 = dpo_backlink
->has_section_at_zero
;
4180 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4182 psymtab_to_symtab_1 (pst
);
4184 /* Finish up the debug error message. */
4186 printf_filtered (_("done.\n"));
4191 /* Add PER_CU to the queue. */
4194 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4196 struct dwarf2_queue_item
*item
;
4199 item
= xmalloc (sizeof (*item
));
4200 item
->per_cu
= per_cu
;
4203 if (dwarf2_queue
== NULL
)
4204 dwarf2_queue
= item
;
4206 dwarf2_queue_tail
->next
= item
;
4208 dwarf2_queue_tail
= item
;
4211 /* Process the queue. */
4214 process_queue (struct objfile
*objfile
)
4216 struct dwarf2_queue_item
*item
, *next_item
;
4218 /* The queue starts out with one item, but following a DIE reference
4219 may load a new CU, adding it to the end of the queue. */
4220 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4222 if (dwarf2_per_objfile
->using_index
4223 ? !item
->per_cu
->v
.quick
->symtab
4224 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4225 process_full_comp_unit (item
->per_cu
);
4227 item
->per_cu
->queued
= 0;
4228 next_item
= item
->next
;
4232 dwarf2_queue_tail
= NULL
;
4235 /* Free all allocated queue entries. This function only releases anything if
4236 an error was thrown; if the queue was processed then it would have been
4237 freed as we went along. */
4240 dwarf2_release_queue (void *dummy
)
4242 struct dwarf2_queue_item
*item
, *last
;
4244 item
= dwarf2_queue
;
4247 /* Anything still marked queued is likely to be in an
4248 inconsistent state, so discard it. */
4249 if (item
->per_cu
->queued
)
4251 if (item
->per_cu
->cu
!= NULL
)
4252 free_one_cached_comp_unit (item
->per_cu
->cu
);
4253 item
->per_cu
->queued
= 0;
4261 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4264 /* Read in full symbols for PST, and anything it depends on. */
4267 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4269 struct dwarf2_per_cu_data
*per_cu
;
4270 struct cleanup
*back_to
;
4273 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4274 if (!pst
->dependencies
[i
]->readin
)
4276 /* Inform about additional files that need to be read in. */
4279 /* FIXME: i18n: Need to make this a single string. */
4280 fputs_filtered (" ", gdb_stdout
);
4282 fputs_filtered ("and ", gdb_stdout
);
4284 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4285 wrap_here (""); /* Flush output */
4286 gdb_flush (gdb_stdout
);
4288 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4291 per_cu
= pst
->read_symtab_private
;
4295 /* It's an include file, no symbols to read for it.
4296 Everything is in the parent symtab. */
4301 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4304 /* Load the DIEs associated with PER_CU into memory. */
4307 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4309 bfd
*abfd
= objfile
->obfd
;
4310 struct dwarf2_cu
*cu
;
4311 unsigned int offset
;
4312 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4313 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4314 struct attribute
*attr
;
4317 gdb_assert (! per_cu
->from_debug_types
);
4319 /* Set local variables from the partial symbol table info. */
4320 offset
= per_cu
->offset
;
4322 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4323 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4324 beg_of_comp_unit
= info_ptr
;
4326 if (per_cu
->cu
== NULL
)
4328 cu
= alloc_one_comp_unit (objfile
);
4332 /* If an error occurs while loading, release our storage. */
4333 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4335 /* Read in the comp_unit header. */
4336 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4338 /* Complete the cu_header. */
4339 cu
->header
.offset
= offset
;
4340 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4342 /* Read the abbrevs for this compilation unit. */
4343 dwarf2_read_abbrevs (abfd
, cu
);
4344 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4346 /* Link this compilation unit into the compilation unit tree. */
4348 cu
->per_cu
= per_cu
;
4350 /* Link this CU into read_in_chain. */
4351 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4352 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4357 info_ptr
+= cu
->header
.first_die_offset
;
4360 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4362 /* We try not to read any attributes in this function, because not
4363 all objfiles needed for references have been loaded yet, and symbol
4364 table processing isn't initialized. But we have to set the CU language,
4365 or we won't be able to build types correctly. */
4366 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
4368 set_cu_language (DW_UNSND (attr
), cu
);
4370 set_cu_language (language_minimal
, cu
);
4372 /* Similarly, if we do not read the producer, we can not apply
4373 producer-specific interpretation. */
4374 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4376 cu
->producer
= DW_STRING (attr
);
4380 do_cleanups (free_abbrevs_cleanup
);
4382 /* We've successfully allocated this compilation unit. Let our
4383 caller clean it up when finished with it. */
4384 discard_cleanups (free_cu_cleanup
);
4388 /* Add a DIE to the delayed physname list. */
4391 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4392 const char *name
, struct die_info
*die
,
4393 struct dwarf2_cu
*cu
)
4395 struct delayed_method_info mi
;
4397 mi
.fnfield_index
= fnfield_index
;
4401 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4404 /* A cleanup for freeing the delayed method list. */
4407 free_delayed_list (void *ptr
)
4409 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4410 if (cu
->method_list
!= NULL
)
4412 VEC_free (delayed_method_info
, cu
->method_list
);
4413 cu
->method_list
= NULL
;
4417 /* Compute the physnames of any methods on the CU's method list.
4419 The computation of method physnames is delayed in order to avoid the
4420 (bad) condition that one of the method's formal parameters is of an as yet
4424 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4427 struct delayed_method_info
*mi
;
4428 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4431 struct fn_fieldlist
*fn_flp
4432 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4433 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4434 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4438 /* Generate full symbol information for PST and CU, whose DIEs have
4439 already been loaded into memory. */
4442 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4444 struct dwarf2_cu
*cu
= per_cu
->cu
;
4445 struct objfile
*objfile
= per_cu
->objfile
;
4446 CORE_ADDR lowpc
, highpc
;
4447 struct symtab
*symtab
;
4448 struct cleanup
*back_to
, *delayed_list_cleanup
;
4451 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4454 back_to
= make_cleanup (really_free_pendings
, NULL
);
4455 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4457 cu
->list_in_scope
= &file_symbols
;
4459 dwarf2_find_base_address (cu
->dies
, cu
);
4461 /* Do line number decoding in read_file_scope () */
4462 process_die (cu
->dies
, cu
);
4464 /* Now that we have processed all the DIEs in the CU, all the types
4465 should be complete, and it should now be safe to compute all of the
4467 compute_delayed_physnames (cu
);
4468 do_cleanups (delayed_list_cleanup
);
4470 /* Some compilers don't define a DW_AT_high_pc attribute for the
4471 compilation unit. If the DW_AT_high_pc is missing, synthesize
4472 it, by scanning the DIE's below the compilation unit. */
4473 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4475 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4477 /* Set symtab language to language from DW_AT_language.
4478 If the compilation is from a C file generated by language preprocessors,
4479 do not set the language if it was already deduced by start_subfile. */
4481 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4483 symtab
->language
= cu
->language
;
4486 if (dwarf2_per_objfile
->using_index
)
4487 per_cu
->v
.quick
->symtab
= symtab
;
4490 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4491 pst
->symtab
= symtab
;
4495 do_cleanups (back_to
);
4498 /* Process a die and its children. */
4501 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4505 case DW_TAG_padding
:
4507 case DW_TAG_compile_unit
:
4508 read_file_scope (die
, cu
);
4510 case DW_TAG_type_unit
:
4511 read_type_unit_scope (die
, cu
);
4513 case DW_TAG_subprogram
:
4514 case DW_TAG_inlined_subroutine
:
4515 read_func_scope (die
, cu
);
4517 case DW_TAG_lexical_block
:
4518 case DW_TAG_try_block
:
4519 case DW_TAG_catch_block
:
4520 read_lexical_block_scope (die
, cu
);
4522 case DW_TAG_class_type
:
4523 case DW_TAG_interface_type
:
4524 case DW_TAG_structure_type
:
4525 case DW_TAG_union_type
:
4526 process_structure_scope (die
, cu
);
4528 case DW_TAG_enumeration_type
:
4529 process_enumeration_scope (die
, cu
);
4532 /* These dies have a type, but processing them does not create
4533 a symbol or recurse to process the children. Therefore we can
4534 read them on-demand through read_type_die. */
4535 case DW_TAG_subroutine_type
:
4536 case DW_TAG_set_type
:
4537 case DW_TAG_array_type
:
4538 case DW_TAG_pointer_type
:
4539 case DW_TAG_ptr_to_member_type
:
4540 case DW_TAG_reference_type
:
4541 case DW_TAG_string_type
:
4544 case DW_TAG_base_type
:
4545 case DW_TAG_subrange_type
:
4546 case DW_TAG_typedef
:
4547 /* Add a typedef symbol for the type definition, if it has a
4549 new_symbol (die
, read_type_die (die
, cu
), cu
);
4551 case DW_TAG_common_block
:
4552 read_common_block (die
, cu
);
4554 case DW_TAG_common_inclusion
:
4556 case DW_TAG_namespace
:
4557 processing_has_namespace_info
= 1;
4558 read_namespace (die
, cu
);
4561 processing_has_namespace_info
= 1;
4562 read_module (die
, cu
);
4564 case DW_TAG_imported_declaration
:
4565 case DW_TAG_imported_module
:
4566 processing_has_namespace_info
= 1;
4567 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4568 || cu
->language
!= language_fortran
))
4569 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4570 dwarf_tag_name (die
->tag
));
4571 read_import_statement (die
, cu
);
4574 new_symbol (die
, NULL
, cu
);
4579 /* A helper function for dwarf2_compute_name which determines whether DIE
4580 needs to have the name of the scope prepended to the name listed in the
4584 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4586 struct attribute
*attr
;
4590 case DW_TAG_namespace
:
4591 case DW_TAG_typedef
:
4592 case DW_TAG_class_type
:
4593 case DW_TAG_interface_type
:
4594 case DW_TAG_structure_type
:
4595 case DW_TAG_union_type
:
4596 case DW_TAG_enumeration_type
:
4597 case DW_TAG_enumerator
:
4598 case DW_TAG_subprogram
:
4602 case DW_TAG_variable
:
4603 /* We only need to prefix "globally" visible variables. These include
4604 any variable marked with DW_AT_external or any variable that
4605 lives in a namespace. [Variables in anonymous namespaces
4606 require prefixing, but they are not DW_AT_external.] */
4608 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4610 struct dwarf2_cu
*spec_cu
= cu
;
4612 return die_needs_namespace (die_specification (die
, &spec_cu
),
4616 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4617 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4618 && die
->parent
->tag
!= DW_TAG_module
)
4620 /* A variable in a lexical block of some kind does not need a
4621 namespace, even though in C++ such variables may be external
4622 and have a mangled name. */
4623 if (die
->parent
->tag
== DW_TAG_lexical_block
4624 || die
->parent
->tag
== DW_TAG_try_block
4625 || die
->parent
->tag
== DW_TAG_catch_block
4626 || die
->parent
->tag
== DW_TAG_subprogram
)
4635 /* Retrieve the last character from a mem_file. */
4638 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4640 char *last_char_p
= (char *) object
;
4643 *last_char_p
= buffer
[length
- 1];
4646 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4647 compute the physname for the object, which include a method's
4648 formal parameters (C++/Java) and return type (Java).
4650 For Ada, return the DIE's linkage name rather than the fully qualified
4651 name. PHYSNAME is ignored..
4653 The result is allocated on the objfile_obstack and canonicalized. */
4656 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4660 name
= dwarf2_name (die
, cu
);
4662 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4663 compute it by typename_concat inside GDB. */
4664 if (cu
->language
== language_ada
4665 || (cu
->language
== language_fortran
&& physname
))
4667 /* For Ada unit, we prefer the linkage name over the name, as
4668 the former contains the exported name, which the user expects
4669 to be able to reference. Ideally, we want the user to be able
4670 to reference this entity using either natural or linkage name,
4671 but we haven't started looking at this enhancement yet. */
4672 struct attribute
*attr
;
4674 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4676 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4677 if (attr
&& DW_STRING (attr
))
4678 return DW_STRING (attr
);
4681 /* These are the only languages we know how to qualify names in. */
4683 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4684 || cu
->language
== language_fortran
))
4686 if (die_needs_namespace (die
, cu
))
4690 struct ui_file
*buf
;
4692 prefix
= determine_prefix (die
, cu
);
4693 buf
= mem_fileopen ();
4694 if (*prefix
!= '\0')
4696 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4699 fputs_unfiltered (prefixed_name
, buf
);
4700 xfree (prefixed_name
);
4703 fputs_unfiltered (name
? name
: "", buf
);
4705 /* Template parameters may be specified in the DIE's DW_AT_name, or
4706 as children with DW_TAG_template_type_param or
4707 DW_TAG_value_type_param. If the latter, add them to the name
4708 here. If the name already has template parameters, then
4709 skip this step; some versions of GCC emit both, and
4710 it is more efficient to use the pre-computed name.
4712 Something to keep in mind about this process: it is very
4713 unlikely, or in some cases downright impossible, to produce
4714 something that will match the mangled name of a function.
4715 If the definition of the function has the same debug info,
4716 we should be able to match up with it anyway. But fallbacks
4717 using the minimal symbol, for instance to find a method
4718 implemented in a stripped copy of libstdc++, will not work.
4719 If we do not have debug info for the definition, we will have to
4720 match them up some other way.
4722 When we do name matching there is a related problem with function
4723 templates; two instantiated function templates are allowed to
4724 differ only by their return types, which we do not add here. */
4726 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4728 struct attribute
*attr
;
4729 struct die_info
*child
;
4732 die
->building_fullname
= 1;
4734 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4739 struct dwarf2_locexpr_baton
*baton
;
4742 if (child
->tag
!= DW_TAG_template_type_param
4743 && child
->tag
!= DW_TAG_template_value_param
)
4748 fputs_unfiltered ("<", buf
);
4752 fputs_unfiltered (", ", buf
);
4754 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4757 complaint (&symfile_complaints
,
4758 _("template parameter missing DW_AT_type"));
4759 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4762 type
= die_type (child
, cu
);
4764 if (child
->tag
== DW_TAG_template_type_param
)
4766 c_print_type (type
, "", buf
, -1, 0);
4770 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4773 complaint (&symfile_complaints
,
4774 _("template parameter missing DW_AT_const_value"));
4775 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4779 dwarf2_const_value_attr (attr
, type
, name
,
4780 &cu
->comp_unit_obstack
, cu
,
4781 &value
, &bytes
, &baton
);
4783 if (TYPE_NOSIGN (type
))
4784 /* GDB prints characters as NUMBER 'CHAR'. If that's
4785 changed, this can use value_print instead. */
4786 c_printchar (value
, type
, buf
);
4789 struct value_print_options opts
;
4792 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4796 else if (bytes
!= NULL
)
4798 v
= allocate_value (type
);
4799 memcpy (value_contents_writeable (v
), bytes
,
4800 TYPE_LENGTH (type
));
4803 v
= value_from_longest (type
, value
);
4805 /* Specify decimal so that we do not depend on the radix. */
4806 get_formatted_print_options (&opts
, 'd');
4808 value_print (v
, buf
, &opts
);
4814 die
->building_fullname
= 0;
4818 /* Close the argument list, with a space if necessary
4819 (nested templates). */
4820 char last_char
= '\0';
4821 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4822 if (last_char
== '>')
4823 fputs_unfiltered (" >", buf
);
4825 fputs_unfiltered (">", buf
);
4829 /* For Java and C++ methods, append formal parameter type
4830 information, if PHYSNAME. */
4832 if (physname
&& die
->tag
== DW_TAG_subprogram
4833 && (cu
->language
== language_cplus
4834 || cu
->language
== language_java
))
4836 struct type
*type
= read_type_die (die
, cu
);
4838 c_type_print_args (type
, buf
, 0, cu
->language
);
4840 if (cu
->language
== language_java
)
4842 /* For java, we must append the return type to method
4844 if (die
->tag
== DW_TAG_subprogram
)
4845 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4848 else if (cu
->language
== language_cplus
)
4850 /* Assume that an artificial first parameter is
4851 "this", but do not crash if it is not. RealView
4852 marks unnamed (and thus unused) parameters as
4853 artificial; there is no way to differentiate
4855 if (TYPE_NFIELDS (type
) > 0
4856 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4857 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4858 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4859 fputs_unfiltered (" const", buf
);
4863 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4865 ui_file_delete (buf
);
4867 if (cu
->language
== language_cplus
)
4870 = dwarf2_canonicalize_name (name
, cu
,
4871 &cu
->objfile
->objfile_obstack
);
4882 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4883 If scope qualifiers are appropriate they will be added. The result
4884 will be allocated on the objfile_obstack, or NULL if the DIE does
4885 not have a name. NAME may either be from a previous call to
4886 dwarf2_name or NULL.
4888 The output string will be canonicalized (if C++/Java). */
4891 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4893 return dwarf2_compute_name (name
, die
, cu
, 0);
4896 /* Construct a physname for the given DIE in CU. NAME may either be
4897 from a previous call to dwarf2_name or NULL. The result will be
4898 allocated on the objfile_objstack or NULL if the DIE does not have a
4901 The output string will be canonicalized (if C++/Java). */
4904 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4906 return dwarf2_compute_name (name
, die
, cu
, 1);
4909 /* Read the import statement specified by the given die and record it. */
4912 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4914 struct attribute
*import_attr
;
4915 struct die_info
*imported_die
;
4916 struct dwarf2_cu
*imported_cu
;
4917 const char *imported_name
;
4918 const char *imported_name_prefix
;
4919 const char *canonical_name
;
4920 const char *import_alias
;
4921 const char *imported_declaration
= NULL
;
4922 const char *import_prefix
;
4926 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4927 if (import_attr
== NULL
)
4929 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4930 dwarf_tag_name (die
->tag
));
4935 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4936 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4937 if (imported_name
== NULL
)
4939 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4941 The import in the following code:
4955 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4956 <52> DW_AT_decl_file : 1
4957 <53> DW_AT_decl_line : 6
4958 <54> DW_AT_import : <0x75>
4959 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4961 <5b> DW_AT_decl_file : 1
4962 <5c> DW_AT_decl_line : 2
4963 <5d> DW_AT_type : <0x6e>
4965 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4966 <76> DW_AT_byte_size : 4
4967 <77> DW_AT_encoding : 5 (signed)
4969 imports the wrong die ( 0x75 instead of 0x58 ).
4970 This case will be ignored until the gcc bug is fixed. */
4974 /* Figure out the local name after import. */
4975 import_alias
= dwarf2_name (die
, cu
);
4977 /* Figure out where the statement is being imported to. */
4978 import_prefix
= determine_prefix (die
, cu
);
4980 /* Figure out what the scope of the imported die is and prepend it
4981 to the name of the imported die. */
4982 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
4984 if (imported_die
->tag
!= DW_TAG_namespace
4985 && imported_die
->tag
!= DW_TAG_module
)
4987 imported_declaration
= imported_name
;
4988 canonical_name
= imported_name_prefix
;
4990 else if (strlen (imported_name_prefix
) > 0)
4992 temp
= alloca (strlen (imported_name_prefix
)
4993 + 2 + strlen (imported_name
) + 1);
4994 strcpy (temp
, imported_name_prefix
);
4995 strcat (temp
, "::");
4996 strcat (temp
, imported_name
);
4997 canonical_name
= temp
;
5000 canonical_name
= imported_name
;
5002 cp_add_using_directive (import_prefix
,
5005 imported_declaration
,
5006 &cu
->objfile
->objfile_obstack
);
5010 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5012 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5016 free_cu_line_header (void *arg
)
5018 struct dwarf2_cu
*cu
= arg
;
5020 free_line_header (cu
->line_header
);
5021 cu
->line_header
= NULL
;
5025 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5026 char **name
, char **comp_dir
)
5028 struct attribute
*attr
;
5033 /* Find the filename. Do not use dwarf2_name here, since the filename
5034 is not a source language identifier. */
5035 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5038 *name
= DW_STRING (attr
);
5041 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5043 *comp_dir
= DW_STRING (attr
);
5044 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5046 *comp_dir
= ldirname (*name
);
5047 if (*comp_dir
!= NULL
)
5048 make_cleanup (xfree
, *comp_dir
);
5050 if (*comp_dir
!= NULL
)
5052 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5053 directory, get rid of it. */
5054 char *cp
= strchr (*comp_dir
, ':');
5056 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5061 *name
= "<unknown>";
5065 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5067 struct objfile
*objfile
= cu
->objfile
;
5068 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5069 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5070 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5071 struct attribute
*attr
;
5073 char *comp_dir
= NULL
;
5074 struct die_info
*child_die
;
5075 bfd
*abfd
= objfile
->obfd
;
5076 struct line_header
*line_header
= 0;
5079 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5081 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5083 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5084 from finish_block. */
5085 if (lowpc
== ((CORE_ADDR
) -1))
5090 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5092 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5095 set_cu_language (DW_UNSND (attr
), cu
);
5098 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5100 cu
->producer
= DW_STRING (attr
);
5102 /* We assume that we're processing GCC output. */
5103 processing_gcc_compilation
= 2;
5105 processing_has_namespace_info
= 0;
5107 start_symtab (name
, comp_dir
, lowpc
);
5108 record_debugformat ("DWARF 2");
5109 record_producer (cu
->producer
);
5111 initialize_cu_func_list (cu
);
5113 /* Decode line number information if present. We do this before
5114 processing child DIEs, so that the line header table is available
5115 for DW_AT_decl_file. */
5116 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5119 unsigned int line_offset
= DW_UNSND (attr
);
5120 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5123 cu
->line_header
= line_header
;
5124 make_cleanup (free_cu_line_header
, cu
);
5125 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5129 /* Process all dies in compilation unit. */
5130 if (die
->child
!= NULL
)
5132 child_die
= die
->child
;
5133 while (child_die
&& child_die
->tag
)
5135 process_die (child_die
, cu
);
5136 child_die
= sibling_die (child_die
);
5140 /* Decode macro information, if present. Dwarf 2 macro information
5141 refers to information in the line number info statement program
5142 header, so we can only read it if we've read the header
5144 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5145 if (attr
&& line_header
)
5147 unsigned int macro_offset
= DW_UNSND (attr
);
5149 dwarf_decode_macros (line_header
, macro_offset
,
5150 comp_dir
, abfd
, cu
);
5152 do_cleanups (back_to
);
5155 /* For TUs we want to skip the first top level sibling if it's not the
5156 actual type being defined by this TU. In this case the first top
5157 level sibling is there to provide context only. */
5160 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5162 struct objfile
*objfile
= cu
->objfile
;
5163 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5165 struct attribute
*attr
;
5167 char *comp_dir
= NULL
;
5168 struct die_info
*child_die
;
5169 bfd
*abfd
= objfile
->obfd
;
5171 /* start_symtab needs a low pc, but we don't really have one.
5172 Do what read_file_scope would do in the absence of such info. */
5173 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5175 /* Find the filename. Do not use dwarf2_name here, since the filename
5176 is not a source language identifier. */
5177 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5179 name
= DW_STRING (attr
);
5181 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5183 comp_dir
= DW_STRING (attr
);
5184 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5186 comp_dir
= ldirname (name
);
5187 if (comp_dir
!= NULL
)
5188 make_cleanup (xfree
, comp_dir
);
5194 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5196 set_cu_language (DW_UNSND (attr
), cu
);
5198 /* This isn't technically needed today. It is done for symmetry
5199 with read_file_scope. */
5200 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5202 cu
->producer
= DW_STRING (attr
);
5204 /* We assume that we're processing GCC output. */
5205 processing_gcc_compilation
= 2;
5207 processing_has_namespace_info
= 0;
5209 start_symtab (name
, comp_dir
, lowpc
);
5210 record_debugformat ("DWARF 2");
5211 record_producer (cu
->producer
);
5213 /* Process the dies in the type unit. */
5214 if (die
->child
== NULL
)
5216 dump_die_for_error (die
);
5217 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5218 bfd_get_filename (abfd
));
5221 child_die
= die
->child
;
5223 while (child_die
&& child_die
->tag
)
5225 process_die (child_die
, cu
);
5227 child_die
= sibling_die (child_die
);
5230 do_cleanups (back_to
);
5234 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5235 struct dwarf2_cu
*cu
)
5237 struct function_range
*thisfn
;
5239 thisfn
= (struct function_range
*)
5240 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5241 thisfn
->name
= name
;
5242 thisfn
->lowpc
= lowpc
;
5243 thisfn
->highpc
= highpc
;
5244 thisfn
->seen_line
= 0;
5245 thisfn
->next
= NULL
;
5247 if (cu
->last_fn
== NULL
)
5248 cu
->first_fn
= thisfn
;
5250 cu
->last_fn
->next
= thisfn
;
5252 cu
->last_fn
= thisfn
;
5255 /* qsort helper for inherit_abstract_dies. */
5258 unsigned_int_compar (const void *ap
, const void *bp
)
5260 unsigned int a
= *(unsigned int *) ap
;
5261 unsigned int b
= *(unsigned int *) bp
;
5263 return (a
> b
) - (b
> a
);
5266 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5267 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5268 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5271 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5273 struct die_info
*child_die
;
5274 unsigned die_children_count
;
5275 /* CU offsets which were referenced by children of the current DIE. */
5277 unsigned *offsets_end
, *offsetp
;
5278 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5279 struct die_info
*origin_die
;
5280 /* Iterator of the ORIGIN_DIE children. */
5281 struct die_info
*origin_child_die
;
5282 struct cleanup
*cleanups
;
5283 struct attribute
*attr
;
5284 struct dwarf2_cu
*origin_cu
;
5285 struct pending
**origin_previous_list_in_scope
;
5287 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5291 /* Note that following die references may follow to a die in a
5295 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5297 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5299 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5300 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5302 if (die
->tag
!= origin_die
->tag
5303 && !(die
->tag
== DW_TAG_inlined_subroutine
5304 && origin_die
->tag
== DW_TAG_subprogram
))
5305 complaint (&symfile_complaints
,
5306 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5307 die
->offset
, origin_die
->offset
);
5309 child_die
= die
->child
;
5310 die_children_count
= 0;
5311 while (child_die
&& child_die
->tag
)
5313 child_die
= sibling_die (child_die
);
5314 die_children_count
++;
5316 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5317 cleanups
= make_cleanup (xfree
, offsets
);
5319 offsets_end
= offsets
;
5320 child_die
= die
->child
;
5321 while (child_die
&& child_die
->tag
)
5323 /* For each CHILD_DIE, find the corresponding child of
5324 ORIGIN_DIE. If there is more than one layer of
5325 DW_AT_abstract_origin, follow them all; there shouldn't be,
5326 but GCC versions at least through 4.4 generate this (GCC PR
5328 struct die_info
*child_origin_die
= child_die
;
5329 struct dwarf2_cu
*child_origin_cu
= cu
;
5333 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5337 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5341 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5342 counterpart may exist. */
5343 if (child_origin_die
!= child_die
)
5345 if (child_die
->tag
!= child_origin_die
->tag
5346 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5347 && child_origin_die
->tag
== DW_TAG_subprogram
))
5348 complaint (&symfile_complaints
,
5349 _("Child DIE 0x%x and its abstract origin 0x%x have "
5350 "different tags"), child_die
->offset
,
5351 child_origin_die
->offset
);
5352 if (child_origin_die
->parent
!= origin_die
)
5353 complaint (&symfile_complaints
,
5354 _("Child DIE 0x%x and its abstract origin 0x%x have "
5355 "different parents"), child_die
->offset
,
5356 child_origin_die
->offset
);
5358 *offsets_end
++ = child_origin_die
->offset
;
5360 child_die
= sibling_die (child_die
);
5362 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5363 unsigned_int_compar
);
5364 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5365 if (offsetp
[-1] == *offsetp
)
5366 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5367 "to DIE 0x%x as their abstract origin"),
5368 die
->offset
, *offsetp
);
5371 origin_child_die
= origin_die
->child
;
5372 while (origin_child_die
&& origin_child_die
->tag
)
5374 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5375 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5377 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5379 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5380 process_die (origin_child_die
, origin_cu
);
5382 origin_child_die
= sibling_die (origin_child_die
);
5384 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5386 do_cleanups (cleanups
);
5390 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5392 struct objfile
*objfile
= cu
->objfile
;
5393 struct context_stack
*new;
5396 struct die_info
*child_die
;
5397 struct attribute
*attr
, *call_line
, *call_file
;
5400 struct block
*block
;
5401 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5402 VEC (symbolp
) *template_args
= NULL
;
5403 struct template_symbol
*templ_func
= NULL
;
5407 /* If we do not have call site information, we can't show the
5408 caller of this inlined function. That's too confusing, so
5409 only use the scope for local variables. */
5410 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5411 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5412 if (call_line
== NULL
|| call_file
== NULL
)
5414 read_lexical_block_scope (die
, cu
);
5419 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5421 name
= dwarf2_name (die
, cu
);
5423 /* Ignore functions with missing or empty names. These are actually
5424 illegal according to the DWARF standard. */
5427 complaint (&symfile_complaints
,
5428 _("missing name for subprogram DIE at %d"), die
->offset
);
5432 /* Ignore functions with missing or invalid low and high pc attributes. */
5433 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5435 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5436 if (!attr
|| !DW_UNSND (attr
))
5437 complaint (&symfile_complaints
,
5438 _("cannot get low and high bounds for subprogram DIE at %d"),
5446 /* Record the function range for dwarf_decode_lines. */
5447 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5449 /* If we have any template arguments, then we must allocate a
5450 different sort of symbol. */
5451 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5453 if (child_die
->tag
== DW_TAG_template_type_param
5454 || child_die
->tag
== DW_TAG_template_value_param
)
5456 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5457 struct template_symbol
);
5458 templ_func
->base
.is_cplus_template_function
= 1;
5463 new = push_context (0, lowpc
);
5464 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5465 (struct symbol
*) templ_func
);
5467 /* If there is a location expression for DW_AT_frame_base, record
5469 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5471 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5472 expression is being recorded directly in the function's symbol
5473 and not in a separate frame-base object. I guess this hack is
5474 to avoid adding some sort of frame-base adjunct/annex to the
5475 function's symbol :-(. The problem with doing this is that it
5476 results in a function symbol with a location expression that
5477 has nothing to do with the location of the function, ouch! The
5478 relationship should be: a function's symbol has-a frame base; a
5479 frame-base has-a location expression. */
5480 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5482 cu
->list_in_scope
= &local_symbols
;
5484 if (die
->child
!= NULL
)
5486 child_die
= die
->child
;
5487 while (child_die
&& child_die
->tag
)
5489 if (child_die
->tag
== DW_TAG_template_type_param
5490 || child_die
->tag
== DW_TAG_template_value_param
)
5492 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5495 VEC_safe_push (symbolp
, template_args
, arg
);
5498 process_die (child_die
, cu
);
5499 child_die
= sibling_die (child_die
);
5503 inherit_abstract_dies (die
, cu
);
5505 /* If we have a DW_AT_specification, we might need to import using
5506 directives from the context of the specification DIE. See the
5507 comment in determine_prefix. */
5508 if (cu
->language
== language_cplus
5509 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5511 struct dwarf2_cu
*spec_cu
= cu
;
5512 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5516 child_die
= spec_die
->child
;
5517 while (child_die
&& child_die
->tag
)
5519 if (child_die
->tag
== DW_TAG_imported_module
)
5520 process_die (child_die
, spec_cu
);
5521 child_die
= sibling_die (child_die
);
5524 /* In some cases, GCC generates specification DIEs that
5525 themselves contain DW_AT_specification attributes. */
5526 spec_die
= die_specification (spec_die
, &spec_cu
);
5530 new = pop_context ();
5531 /* Make a block for the local symbols within. */
5532 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5533 lowpc
, highpc
, objfile
);
5535 /* For C++, set the block's scope. */
5536 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5537 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5538 determine_prefix (die
, cu
),
5539 processing_has_namespace_info
);
5541 /* If we have address ranges, record them. */
5542 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5544 /* Attach template arguments to function. */
5545 if (! VEC_empty (symbolp
, template_args
))
5547 gdb_assert (templ_func
!= NULL
);
5549 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5550 templ_func
->template_arguments
5551 = obstack_alloc (&objfile
->objfile_obstack
,
5552 (templ_func
->n_template_arguments
5553 * sizeof (struct symbol
*)));
5554 memcpy (templ_func
->template_arguments
,
5555 VEC_address (symbolp
, template_args
),
5556 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5557 VEC_free (symbolp
, template_args
);
5560 /* In C++, we can have functions nested inside functions (e.g., when
5561 a function declares a class that has methods). This means that
5562 when we finish processing a function scope, we may need to go
5563 back to building a containing block's symbol lists. */
5564 local_symbols
= new->locals
;
5565 param_symbols
= new->params
;
5566 using_directives
= new->using_directives
;
5568 /* If we've finished processing a top-level function, subsequent
5569 symbols go in the file symbol list. */
5570 if (outermost_context_p ())
5571 cu
->list_in_scope
= &file_symbols
;
5574 /* Process all the DIES contained within a lexical block scope. Start
5575 a new scope, process the dies, and then close the scope. */
5578 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5580 struct objfile
*objfile
= cu
->objfile
;
5581 struct context_stack
*new;
5582 CORE_ADDR lowpc
, highpc
;
5583 struct die_info
*child_die
;
5586 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5588 /* Ignore blocks with missing or invalid low and high pc attributes. */
5589 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5590 as multiple lexical blocks? Handling children in a sane way would
5591 be nasty. Might be easier to properly extend generic blocks to
5593 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5598 push_context (0, lowpc
);
5599 if (die
->child
!= NULL
)
5601 child_die
= die
->child
;
5602 while (child_die
&& child_die
->tag
)
5604 process_die (child_die
, cu
);
5605 child_die
= sibling_die (child_die
);
5608 new = pop_context ();
5610 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5613 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5616 /* Note that recording ranges after traversing children, as we
5617 do here, means that recording a parent's ranges entails
5618 walking across all its children's ranges as they appear in
5619 the address map, which is quadratic behavior.
5621 It would be nicer to record the parent's ranges before
5622 traversing its children, simply overriding whatever you find
5623 there. But since we don't even decide whether to create a
5624 block until after we've traversed its children, that's hard
5626 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5628 local_symbols
= new->locals
;
5629 using_directives
= new->using_directives
;
5632 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5633 Return 1 if the attributes are present and valid, otherwise, return 0.
5634 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5637 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5638 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5639 struct partial_symtab
*ranges_pst
)
5641 struct objfile
*objfile
= cu
->objfile
;
5642 struct comp_unit_head
*cu_header
= &cu
->header
;
5643 bfd
*obfd
= objfile
->obfd
;
5644 unsigned int addr_size
= cu_header
->addr_size
;
5645 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5646 /* Base address selection entry. */
5657 found_base
= cu
->base_known
;
5658 base
= cu
->base_address
;
5660 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5661 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5663 complaint (&symfile_complaints
,
5664 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5668 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5670 /* Read in the largest possible address. */
5671 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5672 if ((marker
& mask
) == mask
)
5674 /* If we found the largest possible address, then
5675 read the base address. */
5676 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5677 buffer
+= 2 * addr_size
;
5678 offset
+= 2 * addr_size
;
5684 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5688 CORE_ADDR range_beginning
, range_end
;
5690 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5691 buffer
+= addr_size
;
5692 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5693 buffer
+= addr_size
;
5694 offset
+= 2 * addr_size
;
5696 /* An end of list marker is a pair of zero addresses. */
5697 if (range_beginning
== 0 && range_end
== 0)
5698 /* Found the end of list entry. */
5701 /* Each base address selection entry is a pair of 2 values.
5702 The first is the largest possible address, the second is
5703 the base address. Check for a base address here. */
5704 if ((range_beginning
& mask
) == mask
)
5706 /* If we found the largest possible address, then
5707 read the base address. */
5708 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5715 /* We have no valid base address for the ranges
5717 complaint (&symfile_complaints
,
5718 _("Invalid .debug_ranges data (no base address)"));
5722 range_beginning
+= base
;
5725 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5726 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5727 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5730 /* FIXME: This is recording everything as a low-high
5731 segment of consecutive addresses. We should have a
5732 data structure for discontiguous block ranges
5736 low
= range_beginning
;
5742 if (range_beginning
< low
)
5743 low
= range_beginning
;
5744 if (range_end
> high
)
5750 /* If the first entry is an end-of-list marker, the range
5751 describes an empty scope, i.e. no instructions. */
5757 *high_return
= high
;
5761 /* Get low and high pc attributes from a die. Return 1 if the attributes
5762 are present and valid, otherwise, return 0. Return -1 if the range is
5763 discontinuous, i.e. derived from DW_AT_ranges information. */
5765 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5766 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5767 struct partial_symtab
*pst
)
5769 struct attribute
*attr
;
5774 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5777 high
= DW_ADDR (attr
);
5778 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5780 low
= DW_ADDR (attr
);
5782 /* Found high w/o low attribute. */
5785 /* Found consecutive range of addresses. */
5790 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5793 /* Value of the DW_AT_ranges attribute is the offset in the
5794 .debug_ranges section. */
5795 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5797 /* Found discontinuous range of addresses. */
5805 /* When using the GNU linker, .gnu.linkonce. sections are used to
5806 eliminate duplicate copies of functions and vtables and such.
5807 The linker will arbitrarily choose one and discard the others.
5808 The AT_*_pc values for such functions refer to local labels in
5809 these sections. If the section from that file was discarded, the
5810 labels are not in the output, so the relocs get a value of 0.
5811 If this is a discarded function, mark the pc bounds as invalid,
5812 so that GDB will ignore it. */
5813 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5821 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5822 its low and high PC addresses. Do nothing if these addresses could not
5823 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5824 and HIGHPC to the high address if greater than HIGHPC. */
5827 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5828 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5829 struct dwarf2_cu
*cu
)
5831 CORE_ADDR low
, high
;
5832 struct die_info
*child
= die
->child
;
5834 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5836 *lowpc
= min (*lowpc
, low
);
5837 *highpc
= max (*highpc
, high
);
5840 /* If the language does not allow nested subprograms (either inside
5841 subprograms or lexical blocks), we're done. */
5842 if (cu
->language
!= language_ada
)
5845 /* Check all the children of the given DIE. If it contains nested
5846 subprograms, then check their pc bounds. Likewise, we need to
5847 check lexical blocks as well, as they may also contain subprogram
5849 while (child
&& child
->tag
)
5851 if (child
->tag
== DW_TAG_subprogram
5852 || child
->tag
== DW_TAG_lexical_block
)
5853 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5854 child
= sibling_die (child
);
5858 /* Get the low and high pc's represented by the scope DIE, and store
5859 them in *LOWPC and *HIGHPC. If the correct values can't be
5860 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5863 get_scope_pc_bounds (struct die_info
*die
,
5864 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5865 struct dwarf2_cu
*cu
)
5867 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5868 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5869 CORE_ADDR current_low
, current_high
;
5871 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5873 best_low
= current_low
;
5874 best_high
= current_high
;
5878 struct die_info
*child
= die
->child
;
5880 while (child
&& child
->tag
)
5882 switch (child
->tag
) {
5883 case DW_TAG_subprogram
:
5884 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5886 case DW_TAG_namespace
:
5888 /* FIXME: carlton/2004-01-16: Should we do this for
5889 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5890 that current GCC's always emit the DIEs corresponding
5891 to definitions of methods of classes as children of a
5892 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5893 the DIEs giving the declarations, which could be
5894 anywhere). But I don't see any reason why the
5895 standards says that they have to be there. */
5896 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5898 if (current_low
!= ((CORE_ADDR
) -1))
5900 best_low
= min (best_low
, current_low
);
5901 best_high
= max (best_high
, current_high
);
5909 child
= sibling_die (child
);
5914 *highpc
= best_high
;
5917 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5920 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5921 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5923 struct attribute
*attr
;
5925 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5928 CORE_ADDR high
= DW_ADDR (attr
);
5930 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5933 CORE_ADDR low
= DW_ADDR (attr
);
5935 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5939 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5942 bfd
*obfd
= cu
->objfile
->obfd
;
5944 /* The value of the DW_AT_ranges attribute is the offset of the
5945 address range list in the .debug_ranges section. */
5946 unsigned long offset
= DW_UNSND (attr
);
5947 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5949 /* For some target architectures, but not others, the
5950 read_address function sign-extends the addresses it returns.
5951 To recognize base address selection entries, we need a
5953 unsigned int addr_size
= cu
->header
.addr_size
;
5954 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5956 /* The base address, to which the next pair is relative. Note
5957 that this 'base' is a DWARF concept: most entries in a range
5958 list are relative, to reduce the number of relocs against the
5959 debugging information. This is separate from this function's
5960 'baseaddr' argument, which GDB uses to relocate debugging
5961 information from a shared library based on the address at
5962 which the library was loaded. */
5963 CORE_ADDR base
= cu
->base_address
;
5964 int base_known
= cu
->base_known
;
5966 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5967 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5969 complaint (&symfile_complaints
,
5970 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5977 unsigned int bytes_read
;
5978 CORE_ADDR start
, end
;
5980 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5981 buffer
+= bytes_read
;
5982 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5983 buffer
+= bytes_read
;
5985 /* Did we find the end of the range list? */
5986 if (start
== 0 && end
== 0)
5989 /* Did we find a base address selection entry? */
5990 else if ((start
& base_select_mask
) == base_select_mask
)
5996 /* We found an ordinary address range. */
6001 complaint (&symfile_complaints
,
6002 _("Invalid .debug_ranges data (no base address)"));
6006 record_block_range (block
,
6007 baseaddr
+ base
+ start
,
6008 baseaddr
+ base
+ end
- 1);
6014 /* Add an aggregate field to the field list. */
6017 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6018 struct dwarf2_cu
*cu
)
6020 struct objfile
*objfile
= cu
->objfile
;
6021 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6022 struct nextfield
*new_field
;
6023 struct attribute
*attr
;
6025 char *fieldname
= "";
6027 /* Allocate a new field list entry and link it in. */
6028 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6029 make_cleanup (xfree
, new_field
);
6030 memset (new_field
, 0, sizeof (struct nextfield
));
6032 if (die
->tag
== DW_TAG_inheritance
)
6034 new_field
->next
= fip
->baseclasses
;
6035 fip
->baseclasses
= new_field
;
6039 new_field
->next
= fip
->fields
;
6040 fip
->fields
= new_field
;
6044 /* Handle accessibility and virtuality of field.
6045 The default accessibility for members is public, the default
6046 accessibility for inheritance is private. */
6047 if (die
->tag
!= DW_TAG_inheritance
)
6048 new_field
->accessibility
= DW_ACCESS_public
;
6050 new_field
->accessibility
= DW_ACCESS_private
;
6051 new_field
->virtuality
= DW_VIRTUALITY_none
;
6053 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6055 new_field
->accessibility
= DW_UNSND (attr
);
6056 if (new_field
->accessibility
!= DW_ACCESS_public
)
6057 fip
->non_public_fields
= 1;
6058 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6060 new_field
->virtuality
= DW_UNSND (attr
);
6062 fp
= &new_field
->field
;
6064 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6066 /* Data member other than a C++ static data member. */
6068 /* Get type of field. */
6069 fp
->type
= die_type (die
, cu
);
6071 SET_FIELD_BITPOS (*fp
, 0);
6073 /* Get bit size of field (zero if none). */
6074 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6077 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6081 FIELD_BITSIZE (*fp
) = 0;
6084 /* Get bit offset of field. */
6085 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6088 int byte_offset
= 0;
6090 if (attr_form_is_section_offset (attr
))
6091 dwarf2_complex_location_expr_complaint ();
6092 else if (attr_form_is_constant (attr
))
6093 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6094 else if (attr_form_is_block (attr
))
6095 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6097 dwarf2_complex_location_expr_complaint ();
6099 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6101 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6104 if (gdbarch_bits_big_endian (gdbarch
))
6106 /* For big endian bits, the DW_AT_bit_offset gives the
6107 additional bit offset from the MSB of the containing
6108 anonymous object to the MSB of the field. We don't
6109 have to do anything special since we don't need to
6110 know the size of the anonymous object. */
6111 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6115 /* For little endian bits, compute the bit offset to the
6116 MSB of the anonymous object, subtract off the number of
6117 bits from the MSB of the field to the MSB of the
6118 object, and then subtract off the number of bits of
6119 the field itself. The result is the bit offset of
6120 the LSB of the field. */
6122 int bit_offset
= DW_UNSND (attr
);
6124 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6127 /* The size of the anonymous object containing
6128 the bit field is explicit, so use the
6129 indicated size (in bytes). */
6130 anonymous_size
= DW_UNSND (attr
);
6134 /* The size of the anonymous object containing
6135 the bit field must be inferred from the type
6136 attribute of the data member containing the
6138 anonymous_size
= TYPE_LENGTH (fp
->type
);
6140 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6141 - bit_offset
- FIELD_BITSIZE (*fp
);
6145 /* Get name of field. */
6146 fieldname
= dwarf2_name (die
, cu
);
6147 if (fieldname
== NULL
)
6150 /* The name is already allocated along with this objfile, so we don't
6151 need to duplicate it for the type. */
6152 fp
->name
= fieldname
;
6154 /* Change accessibility for artificial fields (e.g. virtual table
6155 pointer or virtual base class pointer) to private. */
6156 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6158 FIELD_ARTIFICIAL (*fp
) = 1;
6159 new_field
->accessibility
= DW_ACCESS_private
;
6160 fip
->non_public_fields
= 1;
6163 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6165 /* C++ static member. */
6167 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6168 is a declaration, but all versions of G++ as of this writing
6169 (so through at least 3.2.1) incorrectly generate
6170 DW_TAG_variable tags. */
6174 /* Get name of field. */
6175 fieldname
= dwarf2_name (die
, cu
);
6176 if (fieldname
== NULL
)
6179 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6181 /* Only create a symbol if this is an external value.
6182 new_symbol checks this and puts the value in the global symbol
6183 table, which we want. If it is not external, new_symbol
6184 will try to put the value in cu->list_in_scope which is wrong. */
6185 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6187 /* A static const member, not much different than an enum as far as
6188 we're concerned, except that we can support more types. */
6189 new_symbol (die
, NULL
, cu
);
6192 /* Get physical name. */
6193 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6195 /* The name is already allocated along with this objfile, so we don't
6196 need to duplicate it for the type. */
6197 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6198 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6199 FIELD_NAME (*fp
) = fieldname
;
6201 else if (die
->tag
== DW_TAG_inheritance
)
6203 /* C++ base class field. */
6204 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6207 int byte_offset
= 0;
6209 if (attr_form_is_section_offset (attr
))
6210 dwarf2_complex_location_expr_complaint ();
6211 else if (attr_form_is_constant (attr
))
6212 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6213 else if (attr_form_is_block (attr
))
6214 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6216 dwarf2_complex_location_expr_complaint ();
6218 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6220 FIELD_BITSIZE (*fp
) = 0;
6221 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6222 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6223 fip
->nbaseclasses
++;
6227 /* Add a typedef defined in the scope of the FIP's class. */
6230 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6231 struct dwarf2_cu
*cu
)
6233 struct objfile
*objfile
= cu
->objfile
;
6234 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6235 struct typedef_field_list
*new_field
;
6236 struct attribute
*attr
;
6237 struct typedef_field
*fp
;
6238 char *fieldname
= "";
6240 /* Allocate a new field list entry and link it in. */
6241 new_field
= xzalloc (sizeof (*new_field
));
6242 make_cleanup (xfree
, new_field
);
6244 gdb_assert (die
->tag
== DW_TAG_typedef
);
6246 fp
= &new_field
->field
;
6248 /* Get name of field. */
6249 fp
->name
= dwarf2_name (die
, cu
);
6250 if (fp
->name
== NULL
)
6253 fp
->type
= read_type_die (die
, cu
);
6255 new_field
->next
= fip
->typedef_field_list
;
6256 fip
->typedef_field_list
= new_field
;
6257 fip
->typedef_field_list_count
++;
6260 /* Create the vector of fields, and attach it to the type. */
6263 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6264 struct dwarf2_cu
*cu
)
6266 int nfields
= fip
->nfields
;
6268 /* Record the field count, allocate space for the array of fields,
6269 and create blank accessibility bitfields if necessary. */
6270 TYPE_NFIELDS (type
) = nfields
;
6271 TYPE_FIELDS (type
) = (struct field
*)
6272 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6273 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6275 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6277 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6279 TYPE_FIELD_PRIVATE_BITS (type
) =
6280 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6281 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6283 TYPE_FIELD_PROTECTED_BITS (type
) =
6284 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6285 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6287 TYPE_FIELD_IGNORE_BITS (type
) =
6288 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6289 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6292 /* If the type has baseclasses, allocate and clear a bit vector for
6293 TYPE_FIELD_VIRTUAL_BITS. */
6294 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6296 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6297 unsigned char *pointer
;
6299 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6300 pointer
= TYPE_ALLOC (type
, num_bytes
);
6301 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6302 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6303 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6306 /* Copy the saved-up fields into the field vector. Start from the head
6307 of the list, adding to the tail of the field array, so that they end
6308 up in the same order in the array in which they were added to the list. */
6309 while (nfields
-- > 0)
6311 struct nextfield
*fieldp
;
6315 fieldp
= fip
->fields
;
6316 fip
->fields
= fieldp
->next
;
6320 fieldp
= fip
->baseclasses
;
6321 fip
->baseclasses
= fieldp
->next
;
6324 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6325 switch (fieldp
->accessibility
)
6327 case DW_ACCESS_private
:
6328 if (cu
->language
!= language_ada
)
6329 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6332 case DW_ACCESS_protected
:
6333 if (cu
->language
!= language_ada
)
6334 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6337 case DW_ACCESS_public
:
6341 /* Unknown accessibility. Complain and treat it as public. */
6343 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6344 fieldp
->accessibility
);
6348 if (nfields
< fip
->nbaseclasses
)
6350 switch (fieldp
->virtuality
)
6352 case DW_VIRTUALITY_virtual
:
6353 case DW_VIRTUALITY_pure_virtual
:
6354 if (cu
->language
== language_ada
)
6355 error ("unexpected virtuality in component of Ada type");
6356 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6363 /* Add a member function to the proper fieldlist. */
6366 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6367 struct type
*type
, struct dwarf2_cu
*cu
)
6369 struct objfile
*objfile
= cu
->objfile
;
6370 struct attribute
*attr
;
6371 struct fnfieldlist
*flp
;
6373 struct fn_field
*fnp
;
6375 struct nextfnfield
*new_fnfield
;
6376 struct type
*this_type
;
6378 if (cu
->language
== language_ada
)
6379 error ("unexpected member function in Ada type");
6381 /* Get name of member function. */
6382 fieldname
= dwarf2_name (die
, cu
);
6383 if (fieldname
== NULL
)
6386 /* Look up member function name in fieldlist. */
6387 for (i
= 0; i
< fip
->nfnfields
; i
++)
6389 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6393 /* Create new list element if necessary. */
6394 if (i
< fip
->nfnfields
)
6395 flp
= &fip
->fnfieldlists
[i
];
6398 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6400 fip
->fnfieldlists
= (struct fnfieldlist
*)
6401 xrealloc (fip
->fnfieldlists
,
6402 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6403 * sizeof (struct fnfieldlist
));
6404 if (fip
->nfnfields
== 0)
6405 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6407 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6408 flp
->name
= fieldname
;
6411 i
= fip
->nfnfields
++;
6414 /* Create a new member function field and chain it to the field list
6416 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6417 make_cleanup (xfree
, new_fnfield
);
6418 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6419 new_fnfield
->next
= flp
->head
;
6420 flp
->head
= new_fnfield
;
6423 /* Fill in the member function field info. */
6424 fnp
= &new_fnfield
->fnfield
;
6426 /* Delay processing of the physname until later. */
6427 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6429 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6434 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6435 fnp
->physname
= physname
? physname
: "";
6438 fnp
->type
= alloc_type (objfile
);
6439 this_type
= read_type_die (die
, cu
);
6440 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6442 int nparams
= TYPE_NFIELDS (this_type
);
6444 /* TYPE is the domain of this method, and THIS_TYPE is the type
6445 of the method itself (TYPE_CODE_METHOD). */
6446 smash_to_method_type (fnp
->type
, type
,
6447 TYPE_TARGET_TYPE (this_type
),
6448 TYPE_FIELDS (this_type
),
6449 TYPE_NFIELDS (this_type
),
6450 TYPE_VARARGS (this_type
));
6452 /* Handle static member functions.
6453 Dwarf2 has no clean way to discern C++ static and non-static
6454 member functions. G++ helps GDB by marking the first
6455 parameter for non-static member functions (which is the
6456 this pointer) as artificial. We obtain this information
6457 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6458 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6459 fnp
->voffset
= VOFFSET_STATIC
;
6462 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6463 dwarf2_full_name (fieldname
, die
, cu
));
6465 /* Get fcontext from DW_AT_containing_type if present. */
6466 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6467 fnp
->fcontext
= die_containing_type (die
, cu
);
6469 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6470 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6472 /* Get accessibility. */
6473 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6476 switch (DW_UNSND (attr
))
6478 case DW_ACCESS_private
:
6479 fnp
->is_private
= 1;
6481 case DW_ACCESS_protected
:
6482 fnp
->is_protected
= 1;
6487 /* Check for artificial methods. */
6488 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6489 if (attr
&& DW_UNSND (attr
) != 0)
6490 fnp
->is_artificial
= 1;
6492 /* Get index in virtual function table if it is a virtual member
6493 function. For older versions of GCC, this is an offset in the
6494 appropriate virtual table, as specified by DW_AT_containing_type.
6495 For everyone else, it is an expression to be evaluated relative
6496 to the object address. */
6498 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6501 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6503 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6505 /* Old-style GCC. */
6506 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6508 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6509 || (DW_BLOCK (attr
)->size
> 1
6510 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6511 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6513 struct dwarf_block blk
;
6516 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6518 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6519 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6520 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6521 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6522 dwarf2_complex_location_expr_complaint ();
6524 fnp
->voffset
/= cu
->header
.addr_size
;
6528 dwarf2_complex_location_expr_complaint ();
6531 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6533 else if (attr_form_is_section_offset (attr
))
6535 dwarf2_complex_location_expr_complaint ();
6539 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6545 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6546 if (attr
&& DW_UNSND (attr
))
6548 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6549 complaint (&symfile_complaints
,
6550 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6551 fieldname
, die
->offset
);
6552 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6553 TYPE_CPLUS_DYNAMIC (type
) = 1;
6558 /* Create the vector of member function fields, and attach it to the type. */
6561 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6562 struct dwarf2_cu
*cu
)
6564 struct fnfieldlist
*flp
;
6565 int total_length
= 0;
6568 if (cu
->language
== language_ada
)
6569 error ("unexpected member functions in Ada type");
6571 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6572 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6573 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6575 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6577 struct nextfnfield
*nfp
= flp
->head
;
6578 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6581 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6582 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6583 fn_flp
->fn_fields
= (struct fn_field
*)
6584 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6585 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6586 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6588 total_length
+= flp
->length
;
6591 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6592 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6595 /* Returns non-zero if NAME is the name of a vtable member in CU's
6596 language, zero otherwise. */
6598 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6600 static const char vptr
[] = "_vptr";
6601 static const char vtable
[] = "vtable";
6603 /* Look for the C++ and Java forms of the vtable. */
6604 if ((cu
->language
== language_java
6605 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6606 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6607 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6613 /* GCC outputs unnamed structures that are really pointers to member
6614 functions, with the ABI-specified layout. If TYPE describes
6615 such a structure, smash it into a member function type.
6617 GCC shouldn't do this; it should just output pointer to member DIEs.
6618 This is GCC PR debug/28767. */
6621 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6623 struct type
*pfn_type
, *domain_type
, *new_type
;
6625 /* Check for a structure with no name and two children. */
6626 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6629 /* Check for __pfn and __delta members. */
6630 if (TYPE_FIELD_NAME (type
, 0) == NULL
6631 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6632 || TYPE_FIELD_NAME (type
, 1) == NULL
6633 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6636 /* Find the type of the method. */
6637 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6638 if (pfn_type
== NULL
6639 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6640 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6643 /* Look for the "this" argument. */
6644 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6645 if (TYPE_NFIELDS (pfn_type
) == 0
6646 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6647 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6650 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6651 new_type
= alloc_type (objfile
);
6652 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6653 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6654 TYPE_VARARGS (pfn_type
));
6655 smash_to_methodptr_type (type
, new_type
);
6658 /* Called when we find the DIE that starts a structure or union scope
6659 (definition) to create a type for the structure or union. Fill in
6660 the type's name and general properties; the members will not be
6661 processed until process_structure_type.
6663 NOTE: we need to call these functions regardless of whether or not the
6664 DIE has a DW_AT_name attribute, since it might be an anonymous
6665 structure or union. This gets the type entered into our set of
6668 However, if the structure is incomplete (an opaque struct/union)
6669 then suppress creating a symbol table entry for it since gdb only
6670 wants to find the one with the complete definition. Note that if
6671 it is complete, we just call new_symbol, which does it's own
6672 checking about whether the struct/union is anonymous or not (and
6673 suppresses creating a symbol table entry itself). */
6675 static struct type
*
6676 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6678 struct objfile
*objfile
= cu
->objfile
;
6680 struct attribute
*attr
;
6683 /* If the definition of this type lives in .debug_types, read that type.
6684 Don't follow DW_AT_specification though, that will take us back up
6685 the chain and we want to go down. */
6686 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6689 struct dwarf2_cu
*type_cu
= cu
;
6690 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6692 /* We could just recurse on read_structure_type, but we need to call
6693 get_die_type to ensure only one type for this DIE is created.
6694 This is important, for example, because for c++ classes we need
6695 TYPE_NAME set which is only done by new_symbol. Blech. */
6696 type
= read_type_die (type_die
, type_cu
);
6698 /* TYPE_CU may not be the same as CU.
6699 Ensure TYPE is recorded in CU's type_hash table. */
6700 return set_die_type (die
, type
, cu
);
6703 type
= alloc_type (objfile
);
6704 INIT_CPLUS_SPECIFIC (type
);
6706 name
= dwarf2_name (die
, cu
);
6709 if (cu
->language
== language_cplus
6710 || cu
->language
== language_java
)
6712 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6714 /* dwarf2_full_name might have already finished building the DIE's
6715 type. If so, there is no need to continue. */
6716 if (get_die_type (die
, cu
) != NULL
)
6717 return get_die_type (die
, cu
);
6719 TYPE_TAG_NAME (type
) = full_name
;
6720 if (die
->tag
== DW_TAG_structure_type
6721 || die
->tag
== DW_TAG_class_type
)
6722 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6726 /* The name is already allocated along with this objfile, so
6727 we don't need to duplicate it for the type. */
6728 TYPE_TAG_NAME (type
) = (char *) name
;
6729 if (die
->tag
== DW_TAG_class_type
)
6730 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6734 if (die
->tag
== DW_TAG_structure_type
)
6736 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6738 else if (die
->tag
== DW_TAG_union_type
)
6740 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6744 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6747 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6748 TYPE_DECLARED_CLASS (type
) = 1;
6750 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6753 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6757 TYPE_LENGTH (type
) = 0;
6760 TYPE_STUB_SUPPORTED (type
) = 1;
6761 if (die_is_declaration (die
, cu
))
6762 TYPE_STUB (type
) = 1;
6763 else if (attr
== NULL
&& die
->child
== NULL
6764 && producer_is_realview (cu
->producer
))
6765 /* RealView does not output the required DW_AT_declaration
6766 on incomplete types. */
6767 TYPE_STUB (type
) = 1;
6769 /* We need to add the type field to the die immediately so we don't
6770 infinitely recurse when dealing with pointers to the structure
6771 type within the structure itself. */
6772 set_die_type (die
, type
, cu
);
6774 /* set_die_type should be already done. */
6775 set_descriptive_type (type
, die
, cu
);
6780 /* Finish creating a structure or union type, including filling in
6781 its members and creating a symbol for it. */
6784 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6786 struct objfile
*objfile
= cu
->objfile
;
6787 struct die_info
*child_die
= die
->child
;
6790 type
= get_die_type (die
, cu
);
6792 type
= read_structure_type (die
, cu
);
6794 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6796 struct field_info fi
;
6797 struct die_info
*child_die
;
6798 VEC (symbolp
) *template_args
= NULL
;
6799 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6801 memset (&fi
, 0, sizeof (struct field_info
));
6803 child_die
= die
->child
;
6805 while (child_die
&& child_die
->tag
)
6807 if (child_die
->tag
== DW_TAG_member
6808 || child_die
->tag
== DW_TAG_variable
)
6810 /* NOTE: carlton/2002-11-05: A C++ static data member
6811 should be a DW_TAG_member that is a declaration, but
6812 all versions of G++ as of this writing (so through at
6813 least 3.2.1) incorrectly generate DW_TAG_variable
6814 tags for them instead. */
6815 dwarf2_add_field (&fi
, child_die
, cu
);
6817 else if (child_die
->tag
== DW_TAG_subprogram
)
6819 /* C++ member function. */
6820 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6822 else if (child_die
->tag
== DW_TAG_inheritance
)
6824 /* C++ base class field. */
6825 dwarf2_add_field (&fi
, child_die
, cu
);
6827 else if (child_die
->tag
== DW_TAG_typedef
)
6828 dwarf2_add_typedef (&fi
, child_die
, cu
);
6829 else if (child_die
->tag
== DW_TAG_template_type_param
6830 || child_die
->tag
== DW_TAG_template_value_param
)
6832 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6835 VEC_safe_push (symbolp
, template_args
, arg
);
6838 child_die
= sibling_die (child_die
);
6841 /* Attach template arguments to type. */
6842 if (! VEC_empty (symbolp
, template_args
))
6844 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6845 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6846 = VEC_length (symbolp
, template_args
);
6847 TYPE_TEMPLATE_ARGUMENTS (type
)
6848 = obstack_alloc (&objfile
->objfile_obstack
,
6849 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6850 * sizeof (struct symbol
*)));
6851 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6852 VEC_address (symbolp
, template_args
),
6853 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6854 * sizeof (struct symbol
*)));
6855 VEC_free (symbolp
, template_args
);
6858 /* Attach fields and member functions to the type. */
6860 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6863 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6865 /* Get the type which refers to the base class (possibly this
6866 class itself) which contains the vtable pointer for the current
6867 class from the DW_AT_containing_type attribute. This use of
6868 DW_AT_containing_type is a GNU extension. */
6870 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6872 struct type
*t
= die_containing_type (die
, cu
);
6874 TYPE_VPTR_BASETYPE (type
) = t
;
6879 /* Our own class provides vtbl ptr. */
6880 for (i
= TYPE_NFIELDS (t
) - 1;
6881 i
>= TYPE_N_BASECLASSES (t
);
6884 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6886 if (is_vtable_name (fieldname
, cu
))
6888 TYPE_VPTR_FIELDNO (type
) = i
;
6893 /* Complain if virtual function table field not found. */
6894 if (i
< TYPE_N_BASECLASSES (t
))
6895 complaint (&symfile_complaints
,
6896 _("virtual function table pointer not found when defining class '%s'"),
6897 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6902 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6905 else if (cu
->producer
6906 && strncmp (cu
->producer
,
6907 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6909 /* The IBM XLC compiler does not provide direct indication
6910 of the containing type, but the vtable pointer is
6911 always named __vfp. */
6915 for (i
= TYPE_NFIELDS (type
) - 1;
6916 i
>= TYPE_N_BASECLASSES (type
);
6919 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6921 TYPE_VPTR_FIELDNO (type
) = i
;
6922 TYPE_VPTR_BASETYPE (type
) = type
;
6929 /* Copy fi.typedef_field_list linked list elements content into the
6930 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6931 if (fi
.typedef_field_list
)
6933 int i
= fi
.typedef_field_list_count
;
6935 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6936 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6937 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6938 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6940 /* Reverse the list order to keep the debug info elements order. */
6943 struct typedef_field
*dest
, *src
;
6945 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6946 src
= &fi
.typedef_field_list
->field
;
6947 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6952 do_cleanups (back_to
);
6955 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6957 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6958 snapshots) has been known to create a die giving a declaration
6959 for a class that has, as a child, a die giving a definition for a
6960 nested class. So we have to process our children even if the
6961 current die is a declaration. Normally, of course, a declaration
6962 won't have any children at all. */
6964 while (child_die
!= NULL
&& child_die
->tag
)
6966 if (child_die
->tag
== DW_TAG_member
6967 || child_die
->tag
== DW_TAG_variable
6968 || child_die
->tag
== DW_TAG_inheritance
6969 || child_die
->tag
== DW_TAG_template_value_param
6970 || child_die
->tag
== DW_TAG_template_type_param
)
6975 process_die (child_die
, cu
);
6977 child_die
= sibling_die (child_die
);
6980 /* Do not consider external references. According to the DWARF standard,
6981 these DIEs are identified by the fact that they have no byte_size
6982 attribute, and a declaration attribute. */
6983 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
6984 || !die_is_declaration (die
, cu
))
6985 new_symbol (die
, type
, cu
);
6988 /* Given a DW_AT_enumeration_type die, set its type. We do not
6989 complete the type's fields yet, or create any symbols. */
6991 static struct type
*
6992 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6994 struct objfile
*objfile
= cu
->objfile
;
6996 struct attribute
*attr
;
6999 /* If the definition of this type lives in .debug_types, read that type.
7000 Don't follow DW_AT_specification though, that will take us back up
7001 the chain and we want to go down. */
7002 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7005 struct dwarf2_cu
*type_cu
= cu
;
7006 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7008 type
= read_type_die (type_die
, type_cu
);
7010 /* TYPE_CU may not be the same as CU.
7011 Ensure TYPE is recorded in CU's type_hash table. */
7012 return set_die_type (die
, type
, cu
);
7015 type
= alloc_type (objfile
);
7017 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7018 name
= dwarf2_full_name (NULL
, die
, cu
);
7020 TYPE_TAG_NAME (type
) = (char *) name
;
7022 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7025 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7029 TYPE_LENGTH (type
) = 0;
7032 /* The enumeration DIE can be incomplete. In Ada, any type can be
7033 declared as private in the package spec, and then defined only
7034 inside the package body. Such types are known as Taft Amendment
7035 Types. When another package uses such a type, an incomplete DIE
7036 may be generated by the compiler. */
7037 if (die_is_declaration (die
, cu
))
7038 TYPE_STUB (type
) = 1;
7040 return set_die_type (die
, type
, cu
);
7043 /* Given a pointer to a die which begins an enumeration, process all
7044 the dies that define the members of the enumeration, and create the
7045 symbol for the enumeration type.
7047 NOTE: We reverse the order of the element list. */
7050 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7052 struct type
*this_type
;
7054 this_type
= get_die_type (die
, cu
);
7055 if (this_type
== NULL
)
7056 this_type
= read_enumeration_type (die
, cu
);
7058 if (die
->child
!= NULL
)
7060 struct die_info
*child_die
;
7062 struct field
*fields
= NULL
;
7064 int unsigned_enum
= 1;
7067 child_die
= die
->child
;
7068 while (child_die
&& child_die
->tag
)
7070 if (child_die
->tag
!= DW_TAG_enumerator
)
7072 process_die (child_die
, cu
);
7076 name
= dwarf2_name (child_die
, cu
);
7079 sym
= new_symbol (child_die
, this_type
, cu
);
7080 if (SYMBOL_VALUE (sym
) < 0)
7083 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7085 fields
= (struct field
*)
7087 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7088 * sizeof (struct field
));
7091 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7092 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7093 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7094 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7100 child_die
= sibling_die (child_die
);
7105 TYPE_NFIELDS (this_type
) = num_fields
;
7106 TYPE_FIELDS (this_type
) = (struct field
*)
7107 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7108 memcpy (TYPE_FIELDS (this_type
), fields
,
7109 sizeof (struct field
) * num_fields
);
7113 TYPE_UNSIGNED (this_type
) = 1;
7116 new_symbol (die
, this_type
, cu
);
7119 /* Extract all information from a DW_TAG_array_type DIE and put it in
7120 the DIE's type field. For now, this only handles one dimensional
7123 static struct type
*
7124 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7126 struct objfile
*objfile
= cu
->objfile
;
7127 struct die_info
*child_die
;
7129 struct type
*element_type
, *range_type
, *index_type
;
7130 struct type
**range_types
= NULL
;
7131 struct attribute
*attr
;
7133 struct cleanup
*back_to
;
7136 element_type
= die_type (die
, cu
);
7138 /* The die_type call above may have already set the type for this DIE. */
7139 type
= get_die_type (die
, cu
);
7143 /* Irix 6.2 native cc creates array types without children for
7144 arrays with unspecified length. */
7145 if (die
->child
== NULL
)
7147 index_type
= objfile_type (objfile
)->builtin_int
;
7148 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7149 type
= create_array_type (NULL
, element_type
, range_type
);
7150 return set_die_type (die
, type
, cu
);
7153 back_to
= make_cleanup (null_cleanup
, NULL
);
7154 child_die
= die
->child
;
7155 while (child_die
&& child_die
->tag
)
7157 if (child_die
->tag
== DW_TAG_subrange_type
)
7159 struct type
*child_type
= read_type_die (child_die
, cu
);
7161 if (child_type
!= NULL
)
7163 /* The range type was succesfully read. Save it for
7164 the array type creation. */
7165 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7167 range_types
= (struct type
**)
7168 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7169 * sizeof (struct type
*));
7171 make_cleanup (free_current_contents
, &range_types
);
7173 range_types
[ndim
++] = child_type
;
7176 child_die
= sibling_die (child_die
);
7179 /* Dwarf2 dimensions are output from left to right, create the
7180 necessary array types in backwards order. */
7182 type
= element_type
;
7184 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7189 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7194 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7197 /* Understand Dwarf2 support for vector types (like they occur on
7198 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7199 array type. This is not part of the Dwarf2/3 standard yet, but a
7200 custom vendor extension. The main difference between a regular
7201 array and the vector variant is that vectors are passed by value
7203 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7205 make_vector_type (type
);
7207 name
= dwarf2_name (die
, cu
);
7209 TYPE_NAME (type
) = name
;
7211 /* Install the type in the die. */
7212 set_die_type (die
, type
, cu
);
7214 /* set_die_type should be already done. */
7215 set_descriptive_type (type
, die
, cu
);
7217 do_cleanups (back_to
);
7222 static enum dwarf_array_dim_ordering
7223 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7225 struct attribute
*attr
;
7227 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7229 if (attr
) return DW_SND (attr
);
7232 GNU F77 is a special case, as at 08/2004 array type info is the
7233 opposite order to the dwarf2 specification, but data is still
7234 laid out as per normal fortran.
7236 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7240 if (cu
->language
== language_fortran
7241 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7243 return DW_ORD_row_major
;
7246 switch (cu
->language_defn
->la_array_ordering
)
7248 case array_column_major
:
7249 return DW_ORD_col_major
;
7250 case array_row_major
:
7252 return DW_ORD_row_major
;
7256 /* Extract all information from a DW_TAG_set_type DIE and put it in
7257 the DIE's type field. */
7259 static struct type
*
7260 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7262 struct type
*domain_type
, *set_type
;
7263 struct attribute
*attr
;
7265 domain_type
= die_type (die
, cu
);
7267 /* The die_type call above may have already set the type for this DIE. */
7268 set_type
= get_die_type (die
, cu
);
7272 set_type
= create_set_type (NULL
, domain_type
);
7274 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7276 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7278 return set_die_type (die
, set_type
, cu
);
7281 /* First cut: install each common block member as a global variable. */
7284 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7286 struct die_info
*child_die
;
7287 struct attribute
*attr
;
7289 CORE_ADDR base
= (CORE_ADDR
) 0;
7291 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7294 /* Support the .debug_loc offsets */
7295 if (attr_form_is_block (attr
))
7297 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7299 else if (attr_form_is_section_offset (attr
))
7301 dwarf2_complex_location_expr_complaint ();
7305 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7306 "common block member");
7309 if (die
->child
!= NULL
)
7311 child_die
= die
->child
;
7312 while (child_die
&& child_die
->tag
)
7314 sym
= new_symbol (child_die
, NULL
, cu
);
7315 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7316 if (sym
!= NULL
&& attr
!= NULL
)
7318 CORE_ADDR byte_offset
= 0;
7320 if (attr_form_is_section_offset (attr
))
7321 dwarf2_complex_location_expr_complaint ();
7322 else if (attr_form_is_constant (attr
))
7323 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7324 else if (attr_form_is_block (attr
))
7325 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7327 dwarf2_complex_location_expr_complaint ();
7329 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7330 add_symbol_to_list (sym
, &global_symbols
);
7332 child_die
= sibling_die (child_die
);
7337 /* Create a type for a C++ namespace. */
7339 static struct type
*
7340 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7342 struct objfile
*objfile
= cu
->objfile
;
7343 const char *previous_prefix
, *name
;
7347 /* For extensions, reuse the type of the original namespace. */
7348 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7350 struct die_info
*ext_die
;
7351 struct dwarf2_cu
*ext_cu
= cu
;
7353 ext_die
= dwarf2_extension (die
, &ext_cu
);
7354 type
= read_type_die (ext_die
, ext_cu
);
7356 /* EXT_CU may not be the same as CU.
7357 Ensure TYPE is recorded in CU's type_hash table. */
7358 return set_die_type (die
, type
, cu
);
7361 name
= namespace_name (die
, &is_anonymous
, cu
);
7363 /* Now build the name of the current namespace. */
7365 previous_prefix
= determine_prefix (die
, cu
);
7366 if (previous_prefix
[0] != '\0')
7367 name
= typename_concat (&objfile
->objfile_obstack
,
7368 previous_prefix
, name
, 0, cu
);
7370 /* Create the type. */
7371 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7373 TYPE_NAME (type
) = (char *) name
;
7374 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7376 return set_die_type (die
, type
, cu
);
7379 /* Read a C++ namespace. */
7382 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7384 struct objfile
*objfile
= cu
->objfile
;
7388 /* Add a symbol associated to this if we haven't seen the namespace
7389 before. Also, add a using directive if it's an anonymous
7392 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7396 type
= read_type_die (die
, cu
);
7397 new_symbol (die
, type
, cu
);
7399 name
= namespace_name (die
, &is_anonymous
, cu
);
7402 const char *previous_prefix
= determine_prefix (die
, cu
);
7404 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7405 NULL
, &objfile
->objfile_obstack
);
7409 if (die
->child
!= NULL
)
7411 struct die_info
*child_die
= die
->child
;
7413 while (child_die
&& child_die
->tag
)
7415 process_die (child_die
, cu
);
7416 child_die
= sibling_die (child_die
);
7421 /* Read a Fortran module as type. This DIE can be only a declaration used for
7422 imported module. Still we need that type as local Fortran "use ... only"
7423 declaration imports depend on the created type in determine_prefix. */
7425 static struct type
*
7426 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7428 struct objfile
*objfile
= cu
->objfile
;
7432 module_name
= dwarf2_name (die
, cu
);
7434 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7436 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7438 /* determine_prefix uses TYPE_TAG_NAME. */
7439 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7441 return set_die_type (die
, type
, cu
);
7444 /* Read a Fortran module. */
7447 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7449 struct die_info
*child_die
= die
->child
;
7451 while (child_die
&& child_die
->tag
)
7453 process_die (child_die
, cu
);
7454 child_die
= sibling_die (child_die
);
7458 /* Return the name of the namespace represented by DIE. Set
7459 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7463 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7465 struct die_info
*current_die
;
7466 const char *name
= NULL
;
7468 /* Loop through the extensions until we find a name. */
7470 for (current_die
= die
;
7471 current_die
!= NULL
;
7472 current_die
= dwarf2_extension (die
, &cu
))
7474 name
= dwarf2_name (current_die
, cu
);
7479 /* Is it an anonymous namespace? */
7481 *is_anonymous
= (name
== NULL
);
7483 name
= "(anonymous namespace)";
7488 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7489 the user defined type vector. */
7491 static struct type
*
7492 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7494 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7495 struct comp_unit_head
*cu_header
= &cu
->header
;
7497 struct attribute
*attr_byte_size
;
7498 struct attribute
*attr_address_class
;
7499 int byte_size
, addr_class
;
7500 struct type
*target_type
;
7502 target_type
= die_type (die
, cu
);
7504 /* The die_type call above may have already set the type for this DIE. */
7505 type
= get_die_type (die
, cu
);
7509 type
= lookup_pointer_type (target_type
);
7511 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7513 byte_size
= DW_UNSND (attr_byte_size
);
7515 byte_size
= cu_header
->addr_size
;
7517 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7518 if (attr_address_class
)
7519 addr_class
= DW_UNSND (attr_address_class
);
7521 addr_class
= DW_ADDR_none
;
7523 /* If the pointer size or address class is different than the
7524 default, create a type variant marked as such and set the
7525 length accordingly. */
7526 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7528 if (gdbarch_address_class_type_flags_p (gdbarch
))
7532 type_flags
= gdbarch_address_class_type_flags
7533 (gdbarch
, byte_size
, addr_class
);
7534 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7536 type
= make_type_with_address_space (type
, type_flags
);
7538 else if (TYPE_LENGTH (type
) != byte_size
)
7540 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7544 /* Should we also complain about unhandled address classes? */
7548 TYPE_LENGTH (type
) = byte_size
;
7549 return set_die_type (die
, type
, cu
);
7552 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7553 the user defined type vector. */
7555 static struct type
*
7556 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7559 struct type
*to_type
;
7560 struct type
*domain
;
7562 to_type
= die_type (die
, cu
);
7563 domain
= die_containing_type (die
, cu
);
7565 /* The calls above may have already set the type for this DIE. */
7566 type
= get_die_type (die
, cu
);
7570 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7571 type
= lookup_methodptr_type (to_type
);
7573 type
= lookup_memberptr_type (to_type
, domain
);
7575 return set_die_type (die
, type
, cu
);
7578 /* Extract all information from a DW_TAG_reference_type DIE and add to
7579 the user defined type vector. */
7581 static struct type
*
7582 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7584 struct comp_unit_head
*cu_header
= &cu
->header
;
7585 struct type
*type
, *target_type
;
7586 struct attribute
*attr
;
7588 target_type
= die_type (die
, cu
);
7590 /* The die_type call above may have already set the type for this DIE. */
7591 type
= get_die_type (die
, cu
);
7595 type
= lookup_reference_type (target_type
);
7596 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7599 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7603 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7605 return set_die_type (die
, type
, cu
);
7608 static struct type
*
7609 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7611 struct type
*base_type
, *cv_type
;
7613 base_type
= die_type (die
, cu
);
7615 /* The die_type call above may have already set the type for this DIE. */
7616 cv_type
= get_die_type (die
, cu
);
7620 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7621 return set_die_type (die
, cv_type
, cu
);
7624 static struct type
*
7625 read_tag_volatile_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 (TYPE_CONST (base_type
), 1, base_type
, 0);
7637 return set_die_type (die
, cv_type
, cu
);
7640 /* Extract all information from a DW_TAG_string_type DIE and add to
7641 the user defined type vector. It isn't really a user defined type,
7642 but it behaves like one, with other DIE's using an AT_user_def_type
7643 attribute to reference it. */
7645 static struct type
*
7646 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7648 struct objfile
*objfile
= cu
->objfile
;
7649 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7650 struct type
*type
, *range_type
, *index_type
, *char_type
;
7651 struct attribute
*attr
;
7652 unsigned int length
;
7654 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7657 length
= DW_UNSND (attr
);
7661 /* check for the DW_AT_byte_size attribute */
7662 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7665 length
= DW_UNSND (attr
);
7673 index_type
= objfile_type (objfile
)->builtin_int
;
7674 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7675 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7676 type
= create_string_type (NULL
, char_type
, range_type
);
7678 return set_die_type (die
, type
, cu
);
7681 /* Handle DIES due to C code like:
7685 int (*funcp)(int a, long l);
7689 ('funcp' generates a DW_TAG_subroutine_type DIE)
7692 static struct type
*
7693 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7695 struct type
*type
; /* Type that this function returns */
7696 struct type
*ftype
; /* Function that returns above type */
7697 struct attribute
*attr
;
7699 type
= die_type (die
, cu
);
7701 /* The die_type call above may have already set the type for this DIE. */
7702 ftype
= get_die_type (die
, cu
);
7706 ftype
= lookup_function_type (type
);
7708 /* All functions in C++, Pascal and Java have prototypes. */
7709 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7710 if ((attr
&& (DW_UNSND (attr
) != 0))
7711 || cu
->language
== language_cplus
7712 || cu
->language
== language_java
7713 || cu
->language
== language_pascal
)
7714 TYPE_PROTOTYPED (ftype
) = 1;
7715 else if (producer_is_realview (cu
->producer
))
7716 /* RealView does not emit DW_AT_prototyped. We can not
7717 distinguish prototyped and unprototyped functions; default to
7718 prototyped, since that is more common in modern code (and
7719 RealView warns about unprototyped functions). */
7720 TYPE_PROTOTYPED (ftype
) = 1;
7722 /* Store the calling convention in the type if it's available in
7723 the subroutine die. Otherwise set the calling convention to
7724 the default value DW_CC_normal. */
7725 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7726 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7728 /* We need to add the subroutine type to the die immediately so
7729 we don't infinitely recurse when dealing with parameters
7730 declared as the same subroutine type. */
7731 set_die_type (die
, ftype
, cu
);
7733 if (die
->child
!= NULL
)
7735 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7736 struct die_info
*child_die
;
7737 int nparams
, iparams
;
7739 /* Count the number of parameters.
7740 FIXME: GDB currently ignores vararg functions, but knows about
7741 vararg member functions. */
7743 child_die
= die
->child
;
7744 while (child_die
&& child_die
->tag
)
7746 if (child_die
->tag
== DW_TAG_formal_parameter
)
7748 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7749 TYPE_VARARGS (ftype
) = 1;
7750 child_die
= sibling_die (child_die
);
7753 /* Allocate storage for parameters and fill them in. */
7754 TYPE_NFIELDS (ftype
) = nparams
;
7755 TYPE_FIELDS (ftype
) = (struct field
*)
7756 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7758 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7759 even if we error out during the parameters reading below. */
7760 for (iparams
= 0; iparams
< nparams
; iparams
++)
7761 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7764 child_die
= die
->child
;
7765 while (child_die
&& child_die
->tag
)
7767 if (child_die
->tag
== DW_TAG_formal_parameter
)
7769 struct type
*arg_type
;
7771 /* DWARF version 2 has no clean way to discern C++
7772 static and non-static member functions. G++ helps
7773 GDB by marking the first parameter for non-static
7774 member functions (which is the this pointer) as
7775 artificial. We pass this information to
7776 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7778 DWARF version 3 added DW_AT_object_pointer, which GCC
7779 4.5 does not yet generate. */
7780 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7782 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7785 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7787 /* GCC/43521: In java, the formal parameter
7788 "this" is sometimes not marked with DW_AT_artificial. */
7789 if (cu
->language
== language_java
)
7791 const char *name
= dwarf2_name (child_die
, cu
);
7793 if (name
&& !strcmp (name
, "this"))
7794 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7797 arg_type
= die_type (child_die
, cu
);
7799 /* RealView does not mark THIS as const, which the testsuite
7800 expects. GCC marks THIS as const in method definitions,
7801 but not in the class specifications (GCC PR 43053). */
7802 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7803 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7806 struct dwarf2_cu
*arg_cu
= cu
;
7807 const char *name
= dwarf2_name (child_die
, cu
);
7809 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7812 /* If the compiler emits this, use it. */
7813 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7816 else if (name
&& strcmp (name
, "this") == 0)
7817 /* Function definitions will have the argument names. */
7819 else if (name
== NULL
&& iparams
== 0)
7820 /* Declarations may not have the names, so like
7821 elsewhere in GDB, assume an artificial first
7822 argument is "this". */
7826 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7830 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7833 child_die
= sibling_die (child_die
);
7840 static struct type
*
7841 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7843 struct objfile
*objfile
= cu
->objfile
;
7844 const char *name
= NULL
;
7845 struct type
*this_type
;
7847 name
= dwarf2_full_name (NULL
, die
, cu
);
7848 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7849 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7850 TYPE_NAME (this_type
) = (char *) name
;
7851 set_die_type (die
, this_type
, cu
);
7852 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7856 /* Find a representation of a given base type and install
7857 it in the TYPE field of the die. */
7859 static struct type
*
7860 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7862 struct objfile
*objfile
= cu
->objfile
;
7864 struct attribute
*attr
;
7865 int encoding
= 0, size
= 0;
7867 enum type_code code
= TYPE_CODE_INT
;
7869 struct type
*target_type
= NULL
;
7871 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7874 encoding
= DW_UNSND (attr
);
7876 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7879 size
= DW_UNSND (attr
);
7881 name
= dwarf2_name (die
, cu
);
7884 complaint (&symfile_complaints
,
7885 _("DW_AT_name missing from DW_TAG_base_type"));
7890 case DW_ATE_address
:
7891 /* Turn DW_ATE_address into a void * pointer. */
7892 code
= TYPE_CODE_PTR
;
7893 type_flags
|= TYPE_FLAG_UNSIGNED
;
7894 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7896 case DW_ATE_boolean
:
7897 code
= TYPE_CODE_BOOL
;
7898 type_flags
|= TYPE_FLAG_UNSIGNED
;
7900 case DW_ATE_complex_float
:
7901 code
= TYPE_CODE_COMPLEX
;
7902 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7904 case DW_ATE_decimal_float
:
7905 code
= TYPE_CODE_DECFLOAT
;
7908 code
= TYPE_CODE_FLT
;
7912 case DW_ATE_unsigned
:
7913 type_flags
|= TYPE_FLAG_UNSIGNED
;
7915 case DW_ATE_signed_char
:
7916 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7917 || cu
->language
== language_pascal
)
7918 code
= TYPE_CODE_CHAR
;
7920 case DW_ATE_unsigned_char
:
7921 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7922 || cu
->language
== language_pascal
)
7923 code
= TYPE_CODE_CHAR
;
7924 type_flags
|= TYPE_FLAG_UNSIGNED
;
7927 /* We just treat this as an integer and then recognize the
7928 type by name elsewhere. */
7932 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7933 dwarf_type_encoding_name (encoding
));
7937 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7938 TYPE_NAME (type
) = name
;
7939 TYPE_TARGET_TYPE (type
) = target_type
;
7941 if (name
&& strcmp (name
, "char") == 0)
7942 TYPE_NOSIGN (type
) = 1;
7944 return set_die_type (die
, type
, cu
);
7947 /* Read the given DW_AT_subrange DIE. */
7949 static struct type
*
7950 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7952 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7953 struct type
*base_type
;
7954 struct type
*range_type
;
7955 struct attribute
*attr
;
7959 LONGEST negative_mask
;
7961 base_type
= die_type (die
, cu
);
7962 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7963 check_typedef (base_type
);
7965 /* The die_type call above may have already set the type for this DIE. */
7966 range_type
= get_die_type (die
, cu
);
7970 if (cu
->language
== language_fortran
)
7972 /* FORTRAN implies a lower bound of 1, if not given. */
7976 /* FIXME: For variable sized arrays either of these could be
7977 a variable rather than a constant value. We'll allow it,
7978 but we don't know how to handle it. */
7979 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
7981 low
= dwarf2_get_attr_constant_value (attr
, 0);
7983 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
7986 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
7988 /* GCC encodes arrays with unspecified or dynamic length
7989 with a DW_FORM_block1 attribute or a reference attribute.
7990 FIXME: GDB does not yet know how to handle dynamic
7991 arrays properly, treat them as arrays with unspecified
7994 FIXME: jimb/2003-09-22: GDB does not really know
7995 how to handle arrays of unspecified length
7996 either; we just represent them as zero-length
7997 arrays. Choose an appropriate upper bound given
7998 the lower bound we've computed above. */
8002 high
= dwarf2_get_attr_constant_value (attr
, 1);
8006 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8009 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8010 high
= low
+ count
- 1;
8014 /* Dwarf-2 specifications explicitly allows to create subrange types
8015 without specifying a base type.
8016 In that case, the base type must be set to the type of
8017 the lower bound, upper bound or count, in that order, if any of these
8018 three attributes references an object that has a type.
8019 If no base type is found, the Dwarf-2 specifications say that
8020 a signed integer type of size equal to the size of an address should
8022 For the following C code: `extern char gdb_int [];'
8023 GCC produces an empty range DIE.
8024 FIXME: muller/2010-05-28: Possible references to object for low bound,
8025 high bound or count are not yet handled by this code.
8027 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8029 struct objfile
*objfile
= cu
->objfile
;
8030 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8031 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8032 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8034 /* Test "int", "long int", and "long long int" objfile types,
8035 and select the first one having a size above or equal to the
8036 architecture address size. */
8037 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8038 base_type
= int_type
;
8041 int_type
= objfile_type (objfile
)->builtin_long
;
8042 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8043 base_type
= int_type
;
8046 int_type
= objfile_type (objfile
)->builtin_long_long
;
8047 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8048 base_type
= int_type
;
8054 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8055 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8056 low
|= negative_mask
;
8057 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8058 high
|= negative_mask
;
8060 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8062 /* Mark arrays with dynamic length at least as an array of unspecified
8063 length. GDB could check the boundary but before it gets implemented at
8064 least allow accessing the array elements. */
8065 if (attr
&& attr
->form
== DW_FORM_block1
)
8066 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8068 name
= dwarf2_name (die
, cu
);
8070 TYPE_NAME (range_type
) = name
;
8072 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8074 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8076 set_die_type (die
, range_type
, cu
);
8078 /* set_die_type should be already done. */
8079 set_descriptive_type (range_type
, die
, cu
);
8084 static struct type
*
8085 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8089 /* For now, we only support the C meaning of an unspecified type: void. */
8091 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8092 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8094 return set_die_type (die
, type
, cu
);
8097 /* Trivial hash function for die_info: the hash value of a DIE
8098 is its offset in .debug_info for this objfile. */
8101 die_hash (const void *item
)
8103 const struct die_info
*die
= item
;
8108 /* Trivial comparison function for die_info structures: two DIEs
8109 are equal if they have the same offset. */
8112 die_eq (const void *item_lhs
, const void *item_rhs
)
8114 const struct die_info
*die_lhs
= item_lhs
;
8115 const struct die_info
*die_rhs
= item_rhs
;
8117 return die_lhs
->offset
== die_rhs
->offset
;
8120 /* Read a whole compilation unit into a linked list of dies. */
8122 static struct die_info
*
8123 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8125 struct die_reader_specs reader_specs
;
8126 int read_abbrevs
= 0;
8127 struct cleanup
*back_to
= NULL
;
8128 struct die_info
*die
;
8130 if (cu
->dwarf2_abbrevs
== NULL
)
8132 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8133 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8137 gdb_assert (cu
->die_hash
== NULL
);
8139 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8143 &cu
->comp_unit_obstack
,
8144 hashtab_obstack_allocate
,
8145 dummy_obstack_deallocate
);
8147 init_cu_die_reader (&reader_specs
, cu
);
8149 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8152 do_cleanups (back_to
);
8157 /* Main entry point for reading a DIE and all children.
8158 Read the DIE and dump it if requested. */
8160 static struct die_info
*
8161 read_die_and_children (const struct die_reader_specs
*reader
,
8163 gdb_byte
**new_info_ptr
,
8164 struct die_info
*parent
)
8166 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8167 new_info_ptr
, parent
);
8169 if (dwarf2_die_debug
)
8171 fprintf_unfiltered (gdb_stdlog
,
8172 "\nRead die from %s of %s:\n",
8173 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8175 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8177 : "unknown section",
8178 reader
->abfd
->filename
);
8179 dump_die (result
, dwarf2_die_debug
);
8185 /* Read a single die and all its descendents. Set the die's sibling
8186 field to NULL; set other fields in the die correctly, and set all
8187 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8188 location of the info_ptr after reading all of those dies. PARENT
8189 is the parent of the die in question. */
8191 static struct die_info
*
8192 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8194 gdb_byte
**new_info_ptr
,
8195 struct die_info
*parent
)
8197 struct die_info
*die
;
8201 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8204 *new_info_ptr
= cur_ptr
;
8207 store_in_ref_table (die
, reader
->cu
);
8210 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8214 *new_info_ptr
= cur_ptr
;
8217 die
->sibling
= NULL
;
8218 die
->parent
= parent
;
8222 /* Read a die, all of its descendents, and all of its siblings; set
8223 all of the fields of all of the dies correctly. Arguments are as
8224 in read_die_and_children. */
8226 static struct die_info
*
8227 read_die_and_siblings (const struct die_reader_specs
*reader
,
8229 gdb_byte
**new_info_ptr
,
8230 struct die_info
*parent
)
8232 struct die_info
*first_die
, *last_sibling
;
8236 first_die
= last_sibling
= NULL
;
8240 struct die_info
*die
8241 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8245 *new_info_ptr
= cur_ptr
;
8252 last_sibling
->sibling
= die
;
8258 /* Read the die from the .debug_info section buffer. Set DIEP to
8259 point to a newly allocated die with its information, except for its
8260 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8261 whether the die has children or not. */
8264 read_full_die (const struct die_reader_specs
*reader
,
8265 struct die_info
**diep
, gdb_byte
*info_ptr
,
8268 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8269 struct abbrev_info
*abbrev
;
8270 struct die_info
*die
;
8271 struct dwarf2_cu
*cu
= reader
->cu
;
8272 bfd
*abfd
= reader
->abfd
;
8274 offset
= info_ptr
- reader
->buffer
;
8275 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8276 info_ptr
+= bytes_read
;
8284 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8286 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8288 bfd_get_filename (abfd
));
8290 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8291 die
->offset
= offset
;
8292 die
->tag
= abbrev
->tag
;
8293 die
->abbrev
= abbrev_number
;
8295 die
->num_attrs
= abbrev
->num_attrs
;
8297 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8298 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8299 abfd
, info_ptr
, cu
);
8302 *has_children
= abbrev
->has_children
;
8306 /* In DWARF version 2, the description of the debugging information is
8307 stored in a separate .debug_abbrev section. Before we read any
8308 dies from a section we read in all abbreviations and install them
8309 in a hash table. This function also sets flags in CU describing
8310 the data found in the abbrev table. */
8313 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8315 struct comp_unit_head
*cu_header
= &cu
->header
;
8316 gdb_byte
*abbrev_ptr
;
8317 struct abbrev_info
*cur_abbrev
;
8318 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8319 unsigned int abbrev_form
, hash_number
;
8320 struct attr_abbrev
*cur_attrs
;
8321 unsigned int allocated_attrs
;
8323 /* Initialize dwarf2 abbrevs */
8324 obstack_init (&cu
->abbrev_obstack
);
8325 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8327 * sizeof (struct abbrev_info
*)));
8328 memset (cu
->dwarf2_abbrevs
, 0,
8329 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8331 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8332 &dwarf2_per_objfile
->abbrev
);
8333 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8334 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8335 abbrev_ptr
+= bytes_read
;
8337 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8338 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8340 /* loop until we reach an abbrev number of 0 */
8341 while (abbrev_number
)
8343 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8345 /* read in abbrev header */
8346 cur_abbrev
->number
= abbrev_number
;
8347 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8348 abbrev_ptr
+= bytes_read
;
8349 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8352 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8353 cu
->has_namespace_info
= 1;
8355 /* now read in declarations */
8356 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8357 abbrev_ptr
+= bytes_read
;
8358 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8359 abbrev_ptr
+= bytes_read
;
8362 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8364 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8366 = xrealloc (cur_attrs
, (allocated_attrs
8367 * sizeof (struct attr_abbrev
)));
8370 /* Record whether this compilation unit might have
8371 inter-compilation-unit references. If we don't know what form
8372 this attribute will have, then it might potentially be a
8373 DW_FORM_ref_addr, so we conservatively expect inter-CU
8376 if (abbrev_form
== DW_FORM_ref_addr
8377 || abbrev_form
== DW_FORM_indirect
)
8378 cu
->has_form_ref_addr
= 1;
8380 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8381 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8382 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8383 abbrev_ptr
+= bytes_read
;
8384 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8385 abbrev_ptr
+= bytes_read
;
8388 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8389 (cur_abbrev
->num_attrs
8390 * sizeof (struct attr_abbrev
)));
8391 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8392 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8394 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8395 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8396 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8398 /* Get next abbreviation.
8399 Under Irix6 the abbreviations for a compilation unit are not
8400 always properly terminated with an abbrev number of 0.
8401 Exit loop if we encounter an abbreviation which we have
8402 already read (which means we are about to read the abbreviations
8403 for the next compile unit) or if the end of the abbreviation
8404 table is reached. */
8405 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8406 >= dwarf2_per_objfile
->abbrev
.size
)
8408 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8409 abbrev_ptr
+= bytes_read
;
8410 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8417 /* Release the memory used by the abbrev table for a compilation unit. */
8420 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8422 struct dwarf2_cu
*cu
= ptr_to_cu
;
8424 obstack_free (&cu
->abbrev_obstack
, NULL
);
8425 cu
->dwarf2_abbrevs
= NULL
;
8428 /* Lookup an abbrev_info structure in the abbrev hash table. */
8430 static struct abbrev_info
*
8431 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8433 unsigned int hash_number
;
8434 struct abbrev_info
*abbrev
;
8436 hash_number
= number
% ABBREV_HASH_SIZE
;
8437 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8441 if (abbrev
->number
== number
)
8444 abbrev
= abbrev
->next
;
8449 /* Returns nonzero if TAG represents a type that we might generate a partial
8453 is_type_tag_for_partial (int tag
)
8458 /* Some types that would be reasonable to generate partial symbols for,
8459 that we don't at present. */
8460 case DW_TAG_array_type
:
8461 case DW_TAG_file_type
:
8462 case DW_TAG_ptr_to_member_type
:
8463 case DW_TAG_set_type
:
8464 case DW_TAG_string_type
:
8465 case DW_TAG_subroutine_type
:
8467 case DW_TAG_base_type
:
8468 case DW_TAG_class_type
:
8469 case DW_TAG_interface_type
:
8470 case DW_TAG_enumeration_type
:
8471 case DW_TAG_structure_type
:
8472 case DW_TAG_subrange_type
:
8473 case DW_TAG_typedef
:
8474 case DW_TAG_union_type
:
8481 /* Load all DIEs that are interesting for partial symbols into memory. */
8483 static struct partial_die_info
*
8484 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8485 int building_psymtab
, struct dwarf2_cu
*cu
)
8487 struct partial_die_info
*part_die
;
8488 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8489 struct abbrev_info
*abbrev
;
8490 unsigned int bytes_read
;
8491 unsigned int load_all
= 0;
8493 int nesting_level
= 1;
8498 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8502 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8506 &cu
->comp_unit_obstack
,
8507 hashtab_obstack_allocate
,
8508 dummy_obstack_deallocate
);
8510 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8511 sizeof (struct partial_die_info
));
8515 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8517 /* A NULL abbrev means the end of a series of children. */
8520 if (--nesting_level
== 0)
8522 /* PART_DIE was probably the last thing allocated on the
8523 comp_unit_obstack, so we could call obstack_free
8524 here. We don't do that because the waste is small,
8525 and will be cleaned up when we're done with this
8526 compilation unit. This way, we're also more robust
8527 against other users of the comp_unit_obstack. */
8530 info_ptr
+= bytes_read
;
8531 last_die
= parent_die
;
8532 parent_die
= parent_die
->die_parent
;
8536 /* Check for template arguments. We never save these; if
8537 they're seen, we just mark the parent, and go on our way. */
8538 if (parent_die
!= NULL
8539 && cu
->language
== language_cplus
8540 && (abbrev
->tag
== DW_TAG_template_type_param
8541 || abbrev
->tag
== DW_TAG_template_value_param
))
8543 parent_die
->has_template_arguments
= 1;
8547 /* We don't need a partial DIE for the template argument. */
8548 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8554 /* We only recurse into subprograms looking for template arguments.
8555 Skip their other children. */
8557 && cu
->language
== language_cplus
8558 && parent_die
!= NULL
8559 && parent_die
->tag
== DW_TAG_subprogram
)
8561 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8565 /* Check whether this DIE is interesting enough to save. Normally
8566 we would not be interested in members here, but there may be
8567 later variables referencing them via DW_AT_specification (for
8570 && !is_type_tag_for_partial (abbrev
->tag
)
8571 && abbrev
->tag
!= DW_TAG_enumerator
8572 && abbrev
->tag
!= DW_TAG_subprogram
8573 && abbrev
->tag
!= DW_TAG_lexical_block
8574 && abbrev
->tag
!= DW_TAG_variable
8575 && abbrev
->tag
!= DW_TAG_namespace
8576 && abbrev
->tag
!= DW_TAG_module
8577 && abbrev
->tag
!= DW_TAG_member
)
8579 /* Otherwise we skip to the next sibling, if any. */
8580 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8584 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8585 buffer
, info_ptr
, cu
);
8587 /* This two-pass algorithm for processing partial symbols has a
8588 high cost in cache pressure. Thus, handle some simple cases
8589 here which cover the majority of C partial symbols. DIEs
8590 which neither have specification tags in them, nor could have
8591 specification tags elsewhere pointing at them, can simply be
8592 processed and discarded.
8594 This segment is also optional; scan_partial_symbols and
8595 add_partial_symbol will handle these DIEs if we chain
8596 them in normally. When compilers which do not emit large
8597 quantities of duplicate debug information are more common,
8598 this code can probably be removed. */
8600 /* Any complete simple types at the top level (pretty much all
8601 of them, for a language without namespaces), can be processed
8603 if (parent_die
== NULL
8604 && part_die
->has_specification
== 0
8605 && part_die
->is_declaration
== 0
8606 && (part_die
->tag
== DW_TAG_typedef
8607 || part_die
->tag
== DW_TAG_base_type
8608 || part_die
->tag
== DW_TAG_subrange_type
))
8610 if (building_psymtab
&& part_die
->name
!= NULL
)
8611 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8612 VAR_DOMAIN
, LOC_TYPEDEF
,
8613 &cu
->objfile
->static_psymbols
,
8614 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8615 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8619 /* If we're at the second level, and we're an enumerator, and
8620 our parent has no specification (meaning possibly lives in a
8621 namespace elsewhere), then we can add the partial symbol now
8622 instead of queueing it. */
8623 if (part_die
->tag
== DW_TAG_enumerator
8624 && parent_die
!= NULL
8625 && parent_die
->die_parent
== NULL
8626 && parent_die
->tag
== DW_TAG_enumeration_type
8627 && parent_die
->has_specification
== 0)
8629 if (part_die
->name
== NULL
)
8630 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8631 else if (building_psymtab
)
8632 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8633 VAR_DOMAIN
, LOC_CONST
,
8634 (cu
->language
== language_cplus
8635 || cu
->language
== language_java
)
8636 ? &cu
->objfile
->global_psymbols
8637 : &cu
->objfile
->static_psymbols
,
8638 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8640 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8644 /* We'll save this DIE so link it in. */
8645 part_die
->die_parent
= parent_die
;
8646 part_die
->die_sibling
= NULL
;
8647 part_die
->die_child
= NULL
;
8649 if (last_die
&& last_die
== parent_die
)
8650 last_die
->die_child
= part_die
;
8652 last_die
->die_sibling
= part_die
;
8654 last_die
= part_die
;
8656 if (first_die
== NULL
)
8657 first_die
= part_die
;
8659 /* Maybe add the DIE to the hash table. Not all DIEs that we
8660 find interesting need to be in the hash table, because we
8661 also have the parent/sibling/child chains; only those that we
8662 might refer to by offset later during partial symbol reading.
8664 For now this means things that might have be the target of a
8665 DW_AT_specification, DW_AT_abstract_origin, or
8666 DW_AT_extension. DW_AT_extension will refer only to
8667 namespaces; DW_AT_abstract_origin refers to functions (and
8668 many things under the function DIE, but we do not recurse
8669 into function DIEs during partial symbol reading) and
8670 possibly variables as well; DW_AT_specification refers to
8671 declarations. Declarations ought to have the DW_AT_declaration
8672 flag. It happens that GCC forgets to put it in sometimes, but
8673 only for functions, not for types.
8675 Adding more things than necessary to the hash table is harmless
8676 except for the performance cost. Adding too few will result in
8677 wasted time in find_partial_die, when we reread the compilation
8678 unit with load_all_dies set. */
8681 || abbrev
->tag
== DW_TAG_subprogram
8682 || abbrev
->tag
== DW_TAG_variable
8683 || abbrev
->tag
== DW_TAG_namespace
8684 || part_die
->is_declaration
)
8688 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8689 part_die
->offset
, INSERT
);
8693 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8694 sizeof (struct partial_die_info
));
8696 /* For some DIEs we want to follow their children (if any). For C
8697 we have no reason to follow the children of structures; for other
8698 languages we have to, so that we can get at method physnames
8699 to infer fully qualified class names, for DW_AT_specification,
8700 and for C++ template arguments. For C++, we also look one level
8701 inside functions to find template arguments (if the name of the
8702 function does not already contain the template arguments).
8704 For Ada, we need to scan the children of subprograms and lexical
8705 blocks as well because Ada allows the definition of nested
8706 entities that could be interesting for the debugger, such as
8707 nested subprograms for instance. */
8708 if (last_die
->has_children
8710 || last_die
->tag
== DW_TAG_namespace
8711 || last_die
->tag
== DW_TAG_module
8712 || last_die
->tag
== DW_TAG_enumeration_type
8713 || (cu
->language
== language_cplus
8714 && last_die
->tag
== DW_TAG_subprogram
8715 && (last_die
->name
== NULL
8716 || strchr (last_die
->name
, '<') == NULL
))
8717 || (cu
->language
!= language_c
8718 && (last_die
->tag
== DW_TAG_class_type
8719 || last_die
->tag
== DW_TAG_interface_type
8720 || last_die
->tag
== DW_TAG_structure_type
8721 || last_die
->tag
== DW_TAG_union_type
))
8722 || (cu
->language
== language_ada
8723 && (last_die
->tag
== DW_TAG_subprogram
8724 || last_die
->tag
== DW_TAG_lexical_block
))))
8727 parent_die
= last_die
;
8731 /* Otherwise we skip to the next sibling, if any. */
8732 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8734 /* Back to the top, do it again. */
8738 /* Read a minimal amount of information into the minimal die structure. */
8741 read_partial_die (struct partial_die_info
*part_die
,
8742 struct abbrev_info
*abbrev
,
8743 unsigned int abbrev_len
, bfd
*abfd
,
8744 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8745 struct dwarf2_cu
*cu
)
8748 struct attribute attr
;
8749 int has_low_pc_attr
= 0;
8750 int has_high_pc_attr
= 0;
8752 memset (part_die
, 0, sizeof (struct partial_die_info
));
8754 part_die
->offset
= info_ptr
- buffer
;
8756 info_ptr
+= abbrev_len
;
8761 part_die
->tag
= abbrev
->tag
;
8762 part_die
->has_children
= abbrev
->has_children
;
8764 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8766 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8768 /* Store the data if it is of an attribute we want to keep in a
8769 partial symbol table. */
8773 switch (part_die
->tag
)
8775 case DW_TAG_compile_unit
:
8776 case DW_TAG_type_unit
:
8777 /* Compilation units have a DW_AT_name that is a filename, not
8778 a source language identifier. */
8779 case DW_TAG_enumeration_type
:
8780 case DW_TAG_enumerator
:
8781 /* These tags always have simple identifiers already; no need
8782 to canonicalize them. */
8783 part_die
->name
= DW_STRING (&attr
);
8787 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8788 &cu
->objfile
->objfile_obstack
);
8792 case DW_AT_linkage_name
:
8793 case DW_AT_MIPS_linkage_name
:
8794 /* Note that both forms of linkage name might appear. We
8795 assume they will be the same, and we only store the last
8797 if (cu
->language
== language_ada
)
8798 part_die
->name
= DW_STRING (&attr
);
8801 has_low_pc_attr
= 1;
8802 part_die
->lowpc
= DW_ADDR (&attr
);
8805 has_high_pc_attr
= 1;
8806 part_die
->highpc
= DW_ADDR (&attr
);
8808 case DW_AT_location
:
8809 /* Support the .debug_loc offsets */
8810 if (attr_form_is_block (&attr
))
8812 part_die
->locdesc
= DW_BLOCK (&attr
);
8814 else if (attr_form_is_section_offset (&attr
))
8816 dwarf2_complex_location_expr_complaint ();
8820 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8821 "partial symbol information");
8824 case DW_AT_external
:
8825 part_die
->is_external
= DW_UNSND (&attr
);
8827 case DW_AT_declaration
:
8828 part_die
->is_declaration
= DW_UNSND (&attr
);
8831 part_die
->has_type
= 1;
8833 case DW_AT_abstract_origin
:
8834 case DW_AT_specification
:
8835 case DW_AT_extension
:
8836 part_die
->has_specification
= 1;
8837 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8840 /* Ignore absolute siblings, they might point outside of
8841 the current compile unit. */
8842 if (attr
.form
== DW_FORM_ref_addr
)
8843 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8845 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8847 case DW_AT_byte_size
:
8848 part_die
->has_byte_size
= 1;
8850 case DW_AT_calling_convention
:
8851 /* DWARF doesn't provide a way to identify a program's source-level
8852 entry point. DW_AT_calling_convention attributes are only meant
8853 to describe functions' calling conventions.
8855 However, because it's a necessary piece of information in
8856 Fortran, and because DW_CC_program is the only piece of debugging
8857 information whose definition refers to a 'main program' at all,
8858 several compilers have begun marking Fortran main programs with
8859 DW_CC_program --- even when those functions use the standard
8860 calling conventions.
8862 So until DWARF specifies a way to provide this information and
8863 compilers pick up the new representation, we'll support this
8865 if (DW_UNSND (&attr
) == DW_CC_program
8866 && cu
->language
== language_fortran
)
8867 set_main_name (part_die
->name
);
8874 /* When using the GNU linker, .gnu.linkonce. sections are used to
8875 eliminate duplicate copies of functions and vtables and such.
8876 The linker will arbitrarily choose one and discard the others.
8877 The AT_*_pc values for such functions refer to local labels in
8878 these sections. If the section from that file was discarded, the
8879 labels are not in the output, so the relocs get a value of 0.
8880 If this is a discarded function, mark the pc bounds as invalid,
8881 so that GDB will ignore it. */
8882 if (has_low_pc_attr
&& has_high_pc_attr
8883 && part_die
->lowpc
< part_die
->highpc
8884 && (part_die
->lowpc
!= 0
8885 || dwarf2_per_objfile
->has_section_at_zero
))
8886 part_die
->has_pc_info
= 1;
8891 /* Find a cached partial DIE at OFFSET in CU. */
8893 static struct partial_die_info
*
8894 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8896 struct partial_die_info
*lookup_die
= NULL
;
8897 struct partial_die_info part_die
;
8899 part_die
.offset
= offset
;
8900 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8905 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8906 except in the case of .debug_types DIEs which do not reference
8907 outside their CU (they do however referencing other types via
8910 static struct partial_die_info
*
8911 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8913 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8914 struct partial_die_info
*pd
= NULL
;
8916 if (cu
->per_cu
->from_debug_types
)
8918 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8924 if (offset_in_cu_p (&cu
->header
, offset
))
8926 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8931 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8933 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8934 load_partial_comp_unit (per_cu
, cu
->objfile
);
8936 per_cu
->cu
->last_used
= 0;
8937 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8939 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8941 struct cleanup
*back_to
;
8942 struct partial_die_info comp_unit_die
;
8943 struct abbrev_info
*abbrev
;
8944 unsigned int bytes_read
;
8947 per_cu
->load_all_dies
= 1;
8949 /* Re-read the DIEs. */
8950 back_to
= make_cleanup (null_cleanup
, 0);
8951 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8953 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8954 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8956 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8957 + per_cu
->cu
->header
.offset
8958 + per_cu
->cu
->header
.first_die_offset
);
8959 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8960 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8961 per_cu
->cu
->objfile
->obfd
,
8962 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8964 if (comp_unit_die
.has_children
)
8965 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
8966 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8968 do_cleanups (back_to
);
8970 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8976 internal_error (__FILE__
, __LINE__
,
8977 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8978 offset
, bfd_get_filename (cu
->objfile
->obfd
));
8982 /* Adjust PART_DIE before generating a symbol for it. This function
8983 may set the is_external flag or change the DIE's name. */
8986 fixup_partial_die (struct partial_die_info
*part_die
,
8987 struct dwarf2_cu
*cu
)
8989 /* If we found a reference attribute and the DIE has no name, try
8990 to find a name in the referred to DIE. */
8992 if (part_die
->name
== NULL
&& part_die
->has_specification
)
8994 struct partial_die_info
*spec_die
;
8996 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
8998 fixup_partial_die (spec_die
, cu
);
9002 part_die
->name
= spec_die
->name
;
9004 /* Copy DW_AT_external attribute if it is set. */
9005 if (spec_die
->is_external
)
9006 part_die
->is_external
= spec_die
->is_external
;
9010 /* Set default names for some unnamed DIEs. */
9012 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9013 part_die
->name
= "(anonymous namespace)";
9015 if (part_die
->tag
== DW_TAG_structure_type
9016 || part_die
->tag
== DW_TAG_class_type
9017 || part_die
->tag
== DW_TAG_union_type
)
9018 guess_structure_name (part_die
, cu
);
9021 /* Read an attribute value described by an attribute form. */
9024 read_attribute_value (struct attribute
*attr
, unsigned form
,
9025 bfd
*abfd
, gdb_byte
*info_ptr
,
9026 struct dwarf2_cu
*cu
)
9028 struct comp_unit_head
*cu_header
= &cu
->header
;
9029 unsigned int bytes_read
;
9030 struct dwarf_block
*blk
;
9035 case DW_FORM_ref_addr
:
9036 if (cu
->header
.version
== 2)
9037 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9039 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9040 info_ptr
+= bytes_read
;
9043 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9044 info_ptr
+= bytes_read
;
9046 case DW_FORM_block2
:
9047 blk
= dwarf_alloc_block (cu
);
9048 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9050 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9051 info_ptr
+= blk
->size
;
9052 DW_BLOCK (attr
) = blk
;
9054 case DW_FORM_block4
:
9055 blk
= dwarf_alloc_block (cu
);
9056 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9058 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9059 info_ptr
+= blk
->size
;
9060 DW_BLOCK (attr
) = blk
;
9063 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9067 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9071 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9074 case DW_FORM_sec_offset
:
9075 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9076 info_ptr
+= bytes_read
;
9078 case DW_FORM_string
:
9079 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9080 DW_STRING_IS_CANONICAL (attr
) = 0;
9081 info_ptr
+= bytes_read
;
9084 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9086 DW_STRING_IS_CANONICAL (attr
) = 0;
9087 info_ptr
+= bytes_read
;
9089 case DW_FORM_exprloc
:
9091 blk
= dwarf_alloc_block (cu
);
9092 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9093 info_ptr
+= bytes_read
;
9094 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9095 info_ptr
+= blk
->size
;
9096 DW_BLOCK (attr
) = blk
;
9098 case DW_FORM_block1
:
9099 blk
= dwarf_alloc_block (cu
);
9100 blk
->size
= read_1_byte (abfd
, info_ptr
);
9102 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9103 info_ptr
+= blk
->size
;
9104 DW_BLOCK (attr
) = blk
;
9107 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9111 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9114 case DW_FORM_flag_present
:
9115 DW_UNSND (attr
) = 1;
9118 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9119 info_ptr
+= bytes_read
;
9122 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9123 info_ptr
+= bytes_read
;
9126 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9130 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9134 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9138 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9142 /* Convert the signature to something we can record in DW_UNSND
9144 NOTE: This is NULL if the type wasn't found. */
9145 DW_SIGNATURED_TYPE (attr
) =
9146 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9149 case DW_FORM_ref_udata
:
9150 DW_ADDR (attr
) = (cu
->header
.offset
9151 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9152 info_ptr
+= bytes_read
;
9154 case DW_FORM_indirect
:
9155 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9156 info_ptr
+= bytes_read
;
9157 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9160 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9161 dwarf_form_name (form
),
9162 bfd_get_filename (abfd
));
9165 /* We have seen instances where the compiler tried to emit a byte
9166 size attribute of -1 which ended up being encoded as an unsigned
9167 0xffffffff. Although 0xffffffff is technically a valid size value,
9168 an object of this size seems pretty unlikely so we can relatively
9169 safely treat these cases as if the size attribute was invalid and
9170 treat them as zero by default. */
9171 if (attr
->name
== DW_AT_byte_size
9172 && form
== DW_FORM_data4
9173 && DW_UNSND (attr
) >= 0xffffffff)
9176 (&symfile_complaints
,
9177 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9178 hex_string (DW_UNSND (attr
)));
9179 DW_UNSND (attr
) = 0;
9185 /* Read an attribute described by an abbreviated attribute. */
9188 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9189 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9191 attr
->name
= abbrev
->name
;
9192 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9195 /* read dwarf information from a buffer */
9198 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9200 return bfd_get_8 (abfd
, buf
);
9204 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9206 return bfd_get_signed_8 (abfd
, buf
);
9210 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9212 return bfd_get_16 (abfd
, buf
);
9216 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9218 return bfd_get_signed_16 (abfd
, buf
);
9222 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9224 return bfd_get_32 (abfd
, buf
);
9228 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9230 return bfd_get_signed_32 (abfd
, buf
);
9234 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9236 return bfd_get_64 (abfd
, buf
);
9240 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9241 unsigned int *bytes_read
)
9243 struct comp_unit_head
*cu_header
= &cu
->header
;
9244 CORE_ADDR retval
= 0;
9246 if (cu_header
->signed_addr_p
)
9248 switch (cu_header
->addr_size
)
9251 retval
= bfd_get_signed_16 (abfd
, buf
);
9254 retval
= bfd_get_signed_32 (abfd
, buf
);
9257 retval
= bfd_get_signed_64 (abfd
, buf
);
9260 internal_error (__FILE__
, __LINE__
,
9261 _("read_address: bad switch, signed [in module %s]"),
9262 bfd_get_filename (abfd
));
9267 switch (cu_header
->addr_size
)
9270 retval
= bfd_get_16 (abfd
, buf
);
9273 retval
= bfd_get_32 (abfd
, buf
);
9276 retval
= bfd_get_64 (abfd
, buf
);
9279 internal_error (__FILE__
, __LINE__
,
9280 _("read_address: bad switch, unsigned [in module %s]"),
9281 bfd_get_filename (abfd
));
9285 *bytes_read
= cu_header
->addr_size
;
9289 /* Read the initial length from a section. The (draft) DWARF 3
9290 specification allows the initial length to take up either 4 bytes
9291 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9292 bytes describe the length and all offsets will be 8 bytes in length
9295 An older, non-standard 64-bit format is also handled by this
9296 function. The older format in question stores the initial length
9297 as an 8-byte quantity without an escape value. Lengths greater
9298 than 2^32 aren't very common which means that the initial 4 bytes
9299 is almost always zero. Since a length value of zero doesn't make
9300 sense for the 32-bit format, this initial zero can be considered to
9301 be an escape value which indicates the presence of the older 64-bit
9302 format. As written, the code can't detect (old format) lengths
9303 greater than 4GB. If it becomes necessary to handle lengths
9304 somewhat larger than 4GB, we could allow other small values (such
9305 as the non-sensical values of 1, 2, and 3) to also be used as
9306 escape values indicating the presence of the old format.
9308 The value returned via bytes_read should be used to increment the
9309 relevant pointer after calling read_initial_length().
9311 [ Note: read_initial_length() and read_offset() are based on the
9312 document entitled "DWARF Debugging Information Format", revision
9313 3, draft 8, dated November 19, 2001. This document was obtained
9316 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9318 This document is only a draft and is subject to change. (So beware.)
9320 Details regarding the older, non-standard 64-bit format were
9321 determined empirically by examining 64-bit ELF files produced by
9322 the SGI toolchain on an IRIX 6.5 machine.
9324 - Kevin, July 16, 2002
9328 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9330 LONGEST length
= bfd_get_32 (abfd
, buf
);
9332 if (length
== 0xffffffff)
9334 length
= bfd_get_64 (abfd
, buf
+ 4);
9337 else if (length
== 0)
9339 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9340 length
= bfd_get_64 (abfd
, buf
);
9351 /* Cover function for read_initial_length.
9352 Returns the length of the object at BUF, and stores the size of the
9353 initial length in *BYTES_READ and stores the size that offsets will be in
9355 If the initial length size is not equivalent to that specified in
9356 CU_HEADER then issue a complaint.
9357 This is useful when reading non-comp-unit headers. */
9360 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9361 const struct comp_unit_head
*cu_header
,
9362 unsigned int *bytes_read
,
9363 unsigned int *offset_size
)
9365 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9367 gdb_assert (cu_header
->initial_length_size
== 4
9368 || cu_header
->initial_length_size
== 8
9369 || cu_header
->initial_length_size
== 12);
9371 if (cu_header
->initial_length_size
!= *bytes_read
)
9372 complaint (&symfile_complaints
,
9373 _("intermixed 32-bit and 64-bit DWARF sections"));
9375 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9379 /* Read an offset from the data stream. The size of the offset is
9380 given by cu_header->offset_size. */
9383 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9384 unsigned int *bytes_read
)
9386 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9388 *bytes_read
= cu_header
->offset_size
;
9392 /* Read an offset from the data stream. */
9395 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9399 switch (offset_size
)
9402 retval
= bfd_get_32 (abfd
, buf
);
9405 retval
= bfd_get_64 (abfd
, buf
);
9408 internal_error (__FILE__
, __LINE__
,
9409 _("read_offset_1: bad switch [in module %s]"),
9410 bfd_get_filename (abfd
));
9417 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9419 /* If the size of a host char is 8 bits, we can return a pointer
9420 to the buffer, otherwise we have to copy the data to a buffer
9421 allocated on the temporary obstack. */
9422 gdb_assert (HOST_CHAR_BIT
== 8);
9427 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9429 /* If the size of a host char is 8 bits, we can return a pointer
9430 to the string, otherwise we have to copy the string to a buffer
9431 allocated on the temporary obstack. */
9432 gdb_assert (HOST_CHAR_BIT
== 8);
9435 *bytes_read_ptr
= 1;
9438 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9439 return (char *) buf
;
9443 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9444 const struct comp_unit_head
*cu_header
,
9445 unsigned int *bytes_read_ptr
)
9447 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9449 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9450 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9452 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9453 bfd_get_filename (abfd
));
9456 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9458 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9459 bfd_get_filename (abfd
));
9462 gdb_assert (HOST_CHAR_BIT
== 8);
9463 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9465 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9468 static unsigned long
9469 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9471 unsigned long result
;
9472 unsigned int num_read
;
9482 byte
= bfd_get_8 (abfd
, buf
);
9485 result
|= ((unsigned long)(byte
& 127) << shift
);
9486 if ((byte
& 128) == 0)
9492 *bytes_read_ptr
= num_read
;
9497 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9500 int i
, shift
, num_read
;
9509 byte
= bfd_get_8 (abfd
, buf
);
9512 result
|= ((long)(byte
& 127) << shift
);
9514 if ((byte
& 128) == 0)
9519 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9520 result
|= -(((long)1) << shift
);
9521 *bytes_read_ptr
= num_read
;
9525 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9528 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9534 byte
= bfd_get_8 (abfd
, buf
);
9536 if ((byte
& 128) == 0)
9542 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9549 cu
->language
= language_c
;
9551 case DW_LANG_C_plus_plus
:
9552 cu
->language
= language_cplus
;
9555 cu
->language
= language_d
;
9557 case DW_LANG_Fortran77
:
9558 case DW_LANG_Fortran90
:
9559 case DW_LANG_Fortran95
:
9560 cu
->language
= language_fortran
;
9562 case DW_LANG_Mips_Assembler
:
9563 cu
->language
= language_asm
;
9566 cu
->language
= language_java
;
9570 cu
->language
= language_ada
;
9572 case DW_LANG_Modula2
:
9573 cu
->language
= language_m2
;
9575 case DW_LANG_Pascal83
:
9576 cu
->language
= language_pascal
;
9579 cu
->language
= language_objc
;
9581 case DW_LANG_Cobol74
:
9582 case DW_LANG_Cobol85
:
9584 cu
->language
= language_minimal
;
9587 cu
->language_defn
= language_def (cu
->language
);
9590 /* Return the named attribute or NULL if not there. */
9592 static struct attribute
*
9593 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9596 struct attribute
*spec
= NULL
;
9598 for (i
= 0; i
< die
->num_attrs
; ++i
)
9600 if (die
->attrs
[i
].name
== name
)
9601 return &die
->attrs
[i
];
9602 if (die
->attrs
[i
].name
== DW_AT_specification
9603 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9604 spec
= &die
->attrs
[i
];
9609 die
= follow_die_ref (die
, spec
, &cu
);
9610 return dwarf2_attr (die
, name
, cu
);
9616 /* Return the named attribute or NULL if not there,
9617 but do not follow DW_AT_specification, etc.
9618 This is for use in contexts where we're reading .debug_types dies.
9619 Following DW_AT_specification, DW_AT_abstract_origin will take us
9620 back up the chain, and we want to go down. */
9622 static struct attribute
*
9623 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9624 struct dwarf2_cu
*cu
)
9628 for (i
= 0; i
< die
->num_attrs
; ++i
)
9629 if (die
->attrs
[i
].name
== name
)
9630 return &die
->attrs
[i
];
9635 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9636 and holds a non-zero value. This function should only be used for
9637 DW_FORM_flag or DW_FORM_flag_present attributes. */
9640 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9642 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9644 return (attr
&& DW_UNSND (attr
));
9648 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9650 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9651 which value is non-zero. However, we have to be careful with
9652 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9653 (via dwarf2_flag_true_p) follows this attribute. So we may
9654 end up accidently finding a declaration attribute that belongs
9655 to a different DIE referenced by the specification attribute,
9656 even though the given DIE does not have a declaration attribute. */
9657 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9658 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9661 /* Return the die giving the specification for DIE, if there is
9662 one. *SPEC_CU is the CU containing DIE on input, and the CU
9663 containing the return value on output. If there is no
9664 specification, but there is an abstract origin, that is
9667 static struct die_info
*
9668 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9670 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9673 if (spec_attr
== NULL
)
9674 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9676 if (spec_attr
== NULL
)
9679 return follow_die_ref (die
, spec_attr
, spec_cu
);
9682 /* Free the line_header structure *LH, and any arrays and strings it
9685 free_line_header (struct line_header
*lh
)
9687 if (lh
->standard_opcode_lengths
)
9688 xfree (lh
->standard_opcode_lengths
);
9690 /* Remember that all the lh->file_names[i].name pointers are
9691 pointers into debug_line_buffer, and don't need to be freed. */
9693 xfree (lh
->file_names
);
9695 /* Similarly for the include directory names. */
9696 if (lh
->include_dirs
)
9697 xfree (lh
->include_dirs
);
9703 /* Add an entry to LH's include directory table. */
9705 add_include_dir (struct line_header
*lh
, char *include_dir
)
9707 /* Grow the array if necessary. */
9708 if (lh
->include_dirs_size
== 0)
9710 lh
->include_dirs_size
= 1; /* for testing */
9711 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9712 * sizeof (*lh
->include_dirs
));
9714 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9716 lh
->include_dirs_size
*= 2;
9717 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9718 (lh
->include_dirs_size
9719 * sizeof (*lh
->include_dirs
)));
9722 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9726 /* Add an entry to LH's file name table. */
9728 add_file_name (struct line_header
*lh
,
9730 unsigned int dir_index
,
9731 unsigned int mod_time
,
9732 unsigned int length
)
9734 struct file_entry
*fe
;
9736 /* Grow the array if necessary. */
9737 if (lh
->file_names_size
== 0)
9739 lh
->file_names_size
= 1; /* for testing */
9740 lh
->file_names
= xmalloc (lh
->file_names_size
9741 * sizeof (*lh
->file_names
));
9743 else if (lh
->num_file_names
>= lh
->file_names_size
)
9745 lh
->file_names_size
*= 2;
9746 lh
->file_names
= xrealloc (lh
->file_names
,
9747 (lh
->file_names_size
9748 * sizeof (*lh
->file_names
)));
9751 fe
= &lh
->file_names
[lh
->num_file_names
++];
9753 fe
->dir_index
= dir_index
;
9754 fe
->mod_time
= mod_time
;
9755 fe
->length
= length
;
9761 /* Read the statement program header starting at OFFSET in
9762 .debug_line, according to the endianness of ABFD. Return a pointer
9763 to a struct line_header, allocated using xmalloc.
9765 NOTE: the strings in the include directory and file name tables of
9766 the returned object point into debug_line_buffer, and must not be
9768 static struct line_header
*
9769 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9770 struct dwarf2_cu
*cu
)
9772 struct cleanup
*back_to
;
9773 struct line_header
*lh
;
9775 unsigned int bytes_read
, offset_size
;
9777 char *cur_dir
, *cur_file
;
9779 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9780 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9782 complaint (&symfile_complaints
, _("missing .debug_line section"));
9786 /* Make sure that at least there's room for the total_length field.
9787 That could be 12 bytes long, but we're just going to fudge that. */
9788 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9790 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9794 lh
= xmalloc (sizeof (*lh
));
9795 memset (lh
, 0, sizeof (*lh
));
9796 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9799 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9801 /* Read in the header. */
9803 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9804 &bytes_read
, &offset_size
);
9805 line_ptr
+= bytes_read
;
9806 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9807 + dwarf2_per_objfile
->line
.size
))
9809 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9812 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9813 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9815 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9816 line_ptr
+= offset_size
;
9817 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9819 if (lh
->version
>= 4)
9821 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9825 lh
->maximum_ops_per_instruction
= 1;
9827 if (lh
->maximum_ops_per_instruction
== 0)
9829 lh
->maximum_ops_per_instruction
= 1;
9830 complaint (&symfile_complaints
,
9831 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9834 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9836 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9838 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9840 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9842 lh
->standard_opcode_lengths
9843 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9845 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9846 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9848 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9852 /* Read directory table. */
9853 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9855 line_ptr
+= bytes_read
;
9856 add_include_dir (lh
, cur_dir
);
9858 line_ptr
+= bytes_read
;
9860 /* Read file name table. */
9861 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9863 unsigned int dir_index
, mod_time
, length
;
9865 line_ptr
+= bytes_read
;
9866 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9867 line_ptr
+= bytes_read
;
9868 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9869 line_ptr
+= bytes_read
;
9870 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9871 line_ptr
+= bytes_read
;
9873 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9875 line_ptr
+= bytes_read
;
9876 lh
->statement_program_start
= line_ptr
;
9878 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9879 + dwarf2_per_objfile
->line
.size
))
9880 complaint (&symfile_complaints
,
9881 _("line number info header doesn't fit in `.debug_line' section"));
9883 discard_cleanups (back_to
);
9887 /* This function exists to work around a bug in certain compilers
9888 (particularly GCC 2.95), in which the first line number marker of a
9889 function does not show up until after the prologue, right before
9890 the second line number marker. This function shifts ADDRESS down
9891 to the beginning of the function if necessary, and is called on
9892 addresses passed to record_line. */
9895 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
9897 struct function_range
*fn
;
9899 /* Find the function_range containing address. */
9904 cu
->cached_fn
= cu
->first_fn
;
9908 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9914 while (fn
&& fn
!= cu
->cached_fn
)
9915 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9925 if (address
!= fn
->lowpc
)
9926 complaint (&symfile_complaints
,
9927 _("misplaced first line number at 0x%lx for '%s'"),
9928 (unsigned long) address
, fn
->name
);
9933 /* Subroutine of dwarf_decode_lines to simplify it.
9934 Return the file name of the psymtab for included file FILE_INDEX
9935 in line header LH of PST.
9936 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9937 If space for the result is malloc'd, it will be freed by a cleanup.
9938 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9941 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
9942 const struct partial_symtab
*pst
,
9943 const char *comp_dir
)
9945 const struct file_entry fe
= lh
->file_names
[file_index
];
9946 char *include_name
= fe
.name
;
9947 char *include_name_to_compare
= include_name
;
9948 char *dir_name
= NULL
;
9953 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
9955 if (!IS_ABSOLUTE_PATH (include_name
)
9956 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
9958 /* Avoid creating a duplicate psymtab for PST.
9959 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9960 Before we do the comparison, however, we need to account
9961 for DIR_NAME and COMP_DIR.
9962 First prepend dir_name (if non-NULL). If we still don't
9963 have an absolute path prepend comp_dir (if non-NULL).
9964 However, the directory we record in the include-file's
9965 psymtab does not contain COMP_DIR (to match the
9966 corresponding symtab(s)).
9971 bash$ gcc -g ./hello.c
9972 include_name = "hello.c"
9974 DW_AT_comp_dir = comp_dir = "/tmp"
9975 DW_AT_name = "./hello.c" */
9977 if (dir_name
!= NULL
)
9979 include_name
= concat (dir_name
, SLASH_STRING
,
9980 include_name
, (char *)NULL
);
9981 include_name_to_compare
= include_name
;
9982 make_cleanup (xfree
, include_name
);
9984 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
9986 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
9987 include_name
, (char *)NULL
);
9991 pst_filename
= pst
->filename
;
9992 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
9994 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
9995 pst_filename
, (char *)NULL
);
9998 file_is_pst
= strcmp (include_name_to_compare
, pst_filename
) == 0;
10000 if (include_name_to_compare
!= include_name
)
10001 xfree (include_name_to_compare
);
10002 if (pst_filename
!= pst
->filename
)
10003 xfree (pst_filename
);
10007 return include_name
;
10010 /* Decode the Line Number Program (LNP) for the given line_header
10011 structure and CU. The actual information extracted and the type
10012 of structures created from the LNP depends on the value of PST.
10014 1. If PST is NULL, then this procedure uses the data from the program
10015 to create all necessary symbol tables, and their linetables.
10017 2. If PST is not NULL, this procedure reads the program to determine
10018 the list of files included by the unit represented by PST, and
10019 builds all the associated partial symbol tables.
10021 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10022 It is used for relative paths in the line table.
10023 NOTE: When processing partial symtabs (pst != NULL),
10024 comp_dir == pst->dirname.
10026 NOTE: It is important that psymtabs have the same file name (via strcmp)
10027 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10028 symtab we don't use it in the name of the psymtabs we create.
10029 E.g. expand_line_sal requires this when finding psymtabs to expand.
10030 A good testcase for this is mb-inline.exp. */
10033 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
10034 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10036 gdb_byte
*line_ptr
, *extended_end
;
10037 gdb_byte
*line_end
;
10038 unsigned int bytes_read
, extended_len
;
10039 unsigned char op_code
, extended_op
, adj_opcode
;
10040 CORE_ADDR baseaddr
;
10041 struct objfile
*objfile
= cu
->objfile
;
10042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10043 const int decode_for_pst_p
= (pst
!= NULL
);
10044 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10046 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10048 line_ptr
= lh
->statement_program_start
;
10049 line_end
= lh
->statement_program_end
;
10051 /* Read the statement sequences until there's nothing left. */
10052 while (line_ptr
< line_end
)
10054 /* state machine registers */
10055 CORE_ADDR address
= 0;
10056 unsigned int file
= 1;
10057 unsigned int line
= 1;
10058 unsigned int column
= 0;
10059 int is_stmt
= lh
->default_is_stmt
;
10060 int basic_block
= 0;
10061 int end_sequence
= 0;
10063 unsigned char op_index
= 0;
10065 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10067 /* Start a subfile for the current file of the state machine. */
10068 /* lh->include_dirs and lh->file_names are 0-based, but the
10069 directory and file name numbers in the statement program
10071 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10075 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10077 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10080 /* Decode the table. */
10081 while (!end_sequence
)
10083 op_code
= read_1_byte (abfd
, line_ptr
);
10085 if (line_ptr
> line_end
)
10087 dwarf2_debug_line_missing_end_sequence_complaint ();
10091 if (op_code
>= lh
->opcode_base
)
10093 /* Special operand. */
10094 adj_opcode
= op_code
- lh
->opcode_base
;
10095 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10096 / lh
->maximum_ops_per_instruction
)
10097 * lh
->minimum_instruction_length
);
10098 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10099 % lh
->maximum_ops_per_instruction
);
10100 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10101 if (lh
->num_file_names
< file
|| file
== 0)
10102 dwarf2_debug_line_missing_file_complaint ();
10103 /* For now we ignore lines not starting on an
10104 instruction boundary. */
10105 else if (op_index
== 0)
10107 lh
->file_names
[file
- 1].included_p
= 1;
10108 if (!decode_for_pst_p
&& is_stmt
)
10110 if (last_subfile
!= current_subfile
)
10112 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10114 record_line (last_subfile
, 0, addr
);
10115 last_subfile
= current_subfile
;
10117 /* Append row to matrix using current values. */
10118 addr
= check_cu_functions (address
, cu
);
10119 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10120 record_line (current_subfile
, line
, addr
);
10125 else switch (op_code
)
10127 case DW_LNS_extended_op
:
10128 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10129 line_ptr
+= bytes_read
;
10130 extended_end
= line_ptr
+ extended_len
;
10131 extended_op
= read_1_byte (abfd
, line_ptr
);
10133 switch (extended_op
)
10135 case DW_LNE_end_sequence
:
10138 case DW_LNE_set_address
:
10139 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10141 line_ptr
+= bytes_read
;
10142 address
+= baseaddr
;
10144 case DW_LNE_define_file
:
10147 unsigned int dir_index
, mod_time
, length
;
10149 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10150 line_ptr
+= bytes_read
;
10152 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10153 line_ptr
+= bytes_read
;
10155 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10156 line_ptr
+= bytes_read
;
10158 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10159 line_ptr
+= bytes_read
;
10160 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10163 case DW_LNE_set_discriminator
:
10164 /* The discriminator is not interesting to the debugger;
10166 line_ptr
= extended_end
;
10169 complaint (&symfile_complaints
,
10170 _("mangled .debug_line section"));
10173 /* Make sure that we parsed the extended op correctly. If e.g.
10174 we expected a different address size than the producer used,
10175 we may have read the wrong number of bytes. */
10176 if (line_ptr
!= extended_end
)
10178 complaint (&symfile_complaints
,
10179 _("mangled .debug_line section"));
10184 if (lh
->num_file_names
< file
|| file
== 0)
10185 dwarf2_debug_line_missing_file_complaint ();
10188 lh
->file_names
[file
- 1].included_p
= 1;
10189 if (!decode_for_pst_p
&& is_stmt
)
10191 if (last_subfile
!= current_subfile
)
10193 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10195 record_line (last_subfile
, 0, addr
);
10196 last_subfile
= current_subfile
;
10198 addr
= check_cu_functions (address
, cu
);
10199 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10200 record_line (current_subfile
, line
, addr
);
10205 case DW_LNS_advance_pc
:
10208 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10210 address
+= (((op_index
+ adjust
)
10211 / lh
->maximum_ops_per_instruction
)
10212 * lh
->minimum_instruction_length
);
10213 op_index
= ((op_index
+ adjust
)
10214 % lh
->maximum_ops_per_instruction
);
10215 line_ptr
+= bytes_read
;
10218 case DW_LNS_advance_line
:
10219 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10220 line_ptr
+= bytes_read
;
10222 case DW_LNS_set_file
:
10224 /* The arrays lh->include_dirs and lh->file_names are
10225 0-based, but the directory and file name numbers in
10226 the statement program are 1-based. */
10227 struct file_entry
*fe
;
10230 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10231 line_ptr
+= bytes_read
;
10232 if (lh
->num_file_names
< file
|| file
== 0)
10233 dwarf2_debug_line_missing_file_complaint ();
10236 fe
= &lh
->file_names
[file
- 1];
10238 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10239 if (!decode_for_pst_p
)
10241 last_subfile
= current_subfile
;
10242 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10247 case DW_LNS_set_column
:
10248 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10249 line_ptr
+= bytes_read
;
10251 case DW_LNS_negate_stmt
:
10252 is_stmt
= (!is_stmt
);
10254 case DW_LNS_set_basic_block
:
10257 /* Add to the address register of the state machine the
10258 address increment value corresponding to special opcode
10259 255. I.e., this value is scaled by the minimum
10260 instruction length since special opcode 255 would have
10261 scaled the the increment. */
10262 case DW_LNS_const_add_pc
:
10264 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10266 address
+= (((op_index
+ adjust
)
10267 / lh
->maximum_ops_per_instruction
)
10268 * lh
->minimum_instruction_length
);
10269 op_index
= ((op_index
+ adjust
)
10270 % lh
->maximum_ops_per_instruction
);
10273 case DW_LNS_fixed_advance_pc
:
10274 address
+= read_2_bytes (abfd
, line_ptr
);
10280 /* Unknown standard opcode, ignore it. */
10283 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10285 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10286 line_ptr
+= bytes_read
;
10291 if (lh
->num_file_names
< file
|| file
== 0)
10292 dwarf2_debug_line_missing_file_complaint ();
10295 lh
->file_names
[file
- 1].included_p
= 1;
10296 if (!decode_for_pst_p
)
10298 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10299 record_line (current_subfile
, 0, addr
);
10304 if (decode_for_pst_p
)
10308 /* Now that we're done scanning the Line Header Program, we can
10309 create the psymtab of each included file. */
10310 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10311 if (lh
->file_names
[file_index
].included_p
== 1)
10313 char *include_name
=
10314 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10315 if (include_name
!= NULL
)
10316 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10321 /* Make sure a symtab is created for every file, even files
10322 which contain only variables (i.e. no code with associated
10326 struct file_entry
*fe
;
10328 for (i
= 0; i
< lh
->num_file_names
; i
++)
10332 fe
= &lh
->file_names
[i
];
10334 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10335 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10337 /* Skip the main file; we don't need it, and it must be
10338 allocated last, so that it will show up before the
10339 non-primary symtabs in the objfile's symtab list. */
10340 if (current_subfile
== first_subfile
)
10343 if (current_subfile
->symtab
== NULL
)
10344 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10346 fe
->symtab
= current_subfile
->symtab
;
10351 /* Start a subfile for DWARF. FILENAME is the name of the file and
10352 DIRNAME the name of the source directory which contains FILENAME
10353 or NULL if not known. COMP_DIR is the compilation directory for the
10354 linetable's compilation unit or NULL if not known.
10355 This routine tries to keep line numbers from identical absolute and
10356 relative file names in a common subfile.
10358 Using the `list' example from the GDB testsuite, which resides in
10359 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10360 of /srcdir/list0.c yields the following debugging information for list0.c:
10362 DW_AT_name: /srcdir/list0.c
10363 DW_AT_comp_dir: /compdir
10364 files.files[0].name: list0.h
10365 files.files[0].dir: /srcdir
10366 files.files[1].name: list0.c
10367 files.files[1].dir: /srcdir
10369 The line number information for list0.c has to end up in a single
10370 subfile, so that `break /srcdir/list0.c:1' works as expected.
10371 start_subfile will ensure that this happens provided that we pass the
10372 concatenation of files.files[1].dir and files.files[1].name as the
10376 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
10380 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10381 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10382 second argument to start_subfile. To be consistent, we do the
10383 same here. In order not to lose the line information directory,
10384 we concatenate it to the filename when it makes sense.
10385 Note that the Dwarf3 standard says (speaking of filenames in line
10386 information): ``The directory index is ignored for file names
10387 that represent full path names''. Thus ignoring dirname in the
10388 `else' branch below isn't an issue. */
10390 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10391 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10393 fullname
= filename
;
10395 start_subfile (fullname
, comp_dir
);
10397 if (fullname
!= filename
)
10402 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10403 struct dwarf2_cu
*cu
)
10405 struct objfile
*objfile
= cu
->objfile
;
10406 struct comp_unit_head
*cu_header
= &cu
->header
;
10408 /* NOTE drow/2003-01-30: There used to be a comment and some special
10409 code here to turn a symbol with DW_AT_external and a
10410 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10411 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10412 with some versions of binutils) where shared libraries could have
10413 relocations against symbols in their debug information - the
10414 minimal symbol would have the right address, but the debug info
10415 would not. It's no longer necessary, because we will explicitly
10416 apply relocations when we read in the debug information now. */
10418 /* A DW_AT_location attribute with no contents indicates that a
10419 variable has been optimized away. */
10420 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10422 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10426 /* Handle one degenerate form of location expression specially, to
10427 preserve GDB's previous behavior when section offsets are
10428 specified. If this is just a DW_OP_addr then mark this symbol
10431 if (attr_form_is_block (attr
)
10432 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10433 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10435 unsigned int dummy
;
10437 SYMBOL_VALUE_ADDRESS (sym
) =
10438 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10439 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10440 fixup_symbol_section (sym
, objfile
);
10441 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10442 SYMBOL_SECTION (sym
));
10446 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10447 expression evaluator, and use LOC_COMPUTED only when necessary
10448 (i.e. when the value of a register or memory location is
10449 referenced, or a thread-local block, etc.). Then again, it might
10450 not be worthwhile. I'm assuming that it isn't unless performance
10451 or memory numbers show me otherwise. */
10453 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10454 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10457 /* Given a pointer to a DWARF information entry, figure out if we need
10458 to make a symbol table entry for it, and if so, create a new entry
10459 and return a pointer to it.
10460 If TYPE is NULL, determine symbol type from the die, otherwise
10461 used the passed type.
10462 If SPACE is not NULL, use it to hold the new symbol. If it is
10463 NULL, allocate a new symbol on the objfile's obstack. */
10465 static struct symbol
*
10466 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10467 struct symbol
*space
)
10469 struct objfile
*objfile
= cu
->objfile
;
10470 struct symbol
*sym
= NULL
;
10472 struct attribute
*attr
= NULL
;
10473 struct attribute
*attr2
= NULL
;
10474 CORE_ADDR baseaddr
;
10475 struct pending
**list_to_add
= NULL
;
10477 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10479 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10481 name
= dwarf2_name (die
, cu
);
10484 const char *linkagename
;
10485 int suppress_add
= 0;
10490 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10491 OBJSTAT (objfile
, n_syms
++);
10493 /* Cache this symbol's name and the name's demangled form (if any). */
10494 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10495 linkagename
= dwarf2_physname (name
, die
, cu
);
10496 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10498 /* Fortran does not have mangling standard and the mangling does differ
10499 between gfortran, iFort etc. */
10500 if (cu
->language
== language_fortran
10501 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10502 symbol_set_demangled_name (&(sym
->ginfo
),
10503 (char *) dwarf2_full_name (name
, die
, cu
),
10506 /* Default assumptions.
10507 Use the passed type or decode it from the die. */
10508 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10509 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10511 SYMBOL_TYPE (sym
) = type
;
10513 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10514 attr
= dwarf2_attr (die
,
10515 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10519 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10522 attr
= dwarf2_attr (die
,
10523 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10527 int file_index
= DW_UNSND (attr
);
10529 if (cu
->line_header
== NULL
10530 || file_index
> cu
->line_header
->num_file_names
)
10531 complaint (&symfile_complaints
,
10532 _("file index out of range"));
10533 else if (file_index
> 0)
10535 struct file_entry
*fe
;
10537 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10538 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10545 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10548 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10550 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10551 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10552 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10553 add_symbol_to_list (sym
, cu
->list_in_scope
);
10555 case DW_TAG_subprogram
:
10556 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10558 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10559 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10560 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10561 || cu
->language
== language_ada
)
10563 /* Subprograms marked external are stored as a global symbol.
10564 Ada subprograms, whether marked external or not, are always
10565 stored as a global symbol, because we want to be able to
10566 access them globally. For instance, we want to be able
10567 to break on a nested subprogram without having to
10568 specify the context. */
10569 list_to_add
= &global_symbols
;
10573 list_to_add
= cu
->list_in_scope
;
10576 case DW_TAG_inlined_subroutine
:
10577 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10579 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10580 SYMBOL_INLINED (sym
) = 1;
10581 /* Do not add the symbol to any lists. It will be found via
10582 BLOCK_FUNCTION from the blockvector. */
10584 case DW_TAG_template_value_param
:
10586 /* Fall through. */
10587 case DW_TAG_variable
:
10588 case DW_TAG_member
:
10589 /* Compilation with minimal debug info may result in variables
10590 with missing type entries. Change the misleading `void' type
10591 to something sensible. */
10592 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10594 = objfile_type (objfile
)->nodebug_data_symbol
;
10596 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10597 /* In the case of DW_TAG_member, we should only be called for
10598 static const members. */
10599 if (die
->tag
== DW_TAG_member
)
10601 /* dwarf2_add_field uses die_is_declaration,
10602 so we do the same. */
10603 gdb_assert (die_is_declaration (die
, cu
));
10608 dwarf2_const_value (attr
, sym
, cu
);
10609 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10612 if (attr2
&& (DW_UNSND (attr2
) != 0))
10613 list_to_add
= &global_symbols
;
10615 list_to_add
= cu
->list_in_scope
;
10619 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10622 var_decode_location (attr
, sym
, cu
);
10623 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10624 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10625 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10626 && !dwarf2_per_objfile
->has_section_at_zero
)
10628 /* When a static variable is eliminated by the linker,
10629 the corresponding debug information is not stripped
10630 out, but the variable address is set to null;
10631 do not add such variables into symbol table. */
10633 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10635 /* Workaround gfortran PR debug/40040 - it uses
10636 DW_AT_location for variables in -fPIC libraries which may
10637 get overriden by other libraries/executable and get
10638 a different address. Resolve it by the minimal symbol
10639 which may come from inferior's executable using copy
10640 relocation. Make this workaround only for gfortran as for
10641 other compilers GDB cannot guess the minimal symbol
10642 Fortran mangling kind. */
10643 if (cu
->language
== language_fortran
&& die
->parent
10644 && die
->parent
->tag
== DW_TAG_module
10646 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10647 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10649 /* A variable with DW_AT_external is never static,
10650 but it may be block-scoped. */
10651 list_to_add
= (cu
->list_in_scope
== &file_symbols
10652 ? &global_symbols
: cu
->list_in_scope
);
10655 list_to_add
= cu
->list_in_scope
;
10659 /* We do not know the address of this symbol.
10660 If it is an external symbol and we have type information
10661 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10662 The address of the variable will then be determined from
10663 the minimal symbol table whenever the variable is
10665 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10666 if (attr2
&& (DW_UNSND (attr2
) != 0)
10667 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10669 /* A variable with DW_AT_external is never static, but it
10670 may be block-scoped. */
10671 list_to_add
= (cu
->list_in_scope
== &file_symbols
10672 ? &global_symbols
: cu
->list_in_scope
);
10674 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10676 else if (!die_is_declaration (die
, cu
))
10678 /* Use the default LOC_OPTIMIZED_OUT class. */
10679 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10681 list_to_add
= cu
->list_in_scope
;
10685 case DW_TAG_formal_parameter
:
10686 /* If we are inside a function, mark this as an argument. If
10687 not, we might be looking at an argument to an inlined function
10688 when we do not have enough information to show inlined frames;
10689 pretend it's a local variable in that case so that the user can
10691 if (context_stack_depth
> 0
10692 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10693 SYMBOL_IS_ARGUMENT (sym
) = 1;
10694 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10697 var_decode_location (attr
, sym
, cu
);
10699 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10702 dwarf2_const_value (attr
, sym
, cu
);
10704 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10705 if (attr
&& DW_UNSND (attr
))
10707 struct type
*ref_type
;
10709 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10710 SYMBOL_TYPE (sym
) = ref_type
;
10713 list_to_add
= cu
->list_in_scope
;
10715 case DW_TAG_unspecified_parameters
:
10716 /* From varargs functions; gdb doesn't seem to have any
10717 interest in this information, so just ignore it for now.
10720 case DW_TAG_template_type_param
:
10722 /* Fall through. */
10723 case DW_TAG_class_type
:
10724 case DW_TAG_interface_type
:
10725 case DW_TAG_structure_type
:
10726 case DW_TAG_union_type
:
10727 case DW_TAG_set_type
:
10728 case DW_TAG_enumeration_type
:
10729 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10730 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10733 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10734 really ever be static objects: otherwise, if you try
10735 to, say, break of a class's method and you're in a file
10736 which doesn't mention that class, it won't work unless
10737 the check for all static symbols in lookup_symbol_aux
10738 saves you. See the OtherFileClass tests in
10739 gdb.c++/namespace.exp. */
10743 list_to_add
= (cu
->list_in_scope
== &file_symbols
10744 && (cu
->language
== language_cplus
10745 || cu
->language
== language_java
)
10746 ? &global_symbols
: cu
->list_in_scope
);
10748 /* The semantics of C++ state that "struct foo {
10749 ... }" also defines a typedef for "foo". A Java
10750 class declaration also defines a typedef for the
10752 if (cu
->language
== language_cplus
10753 || cu
->language
== language_java
10754 || cu
->language
== language_ada
)
10756 /* The symbol's name is already allocated along
10757 with this objfile, so we don't need to
10758 duplicate it for the type. */
10759 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10760 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10765 case DW_TAG_typedef
:
10766 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10767 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10768 list_to_add
= cu
->list_in_scope
;
10770 case DW_TAG_base_type
:
10771 case DW_TAG_subrange_type
:
10772 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10773 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10774 list_to_add
= cu
->list_in_scope
;
10776 case DW_TAG_enumerator
:
10777 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10780 dwarf2_const_value (attr
, sym
, cu
);
10783 /* NOTE: carlton/2003-11-10: See comment above in the
10784 DW_TAG_class_type, etc. block. */
10786 list_to_add
= (cu
->list_in_scope
== &file_symbols
10787 && (cu
->language
== language_cplus
10788 || cu
->language
== language_java
)
10789 ? &global_symbols
: cu
->list_in_scope
);
10792 case DW_TAG_namespace
:
10793 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10794 list_to_add
= &global_symbols
;
10797 /* Not a tag we recognize. Hopefully we aren't processing
10798 trash data, but since we must specifically ignore things
10799 we don't recognize, there is nothing else we should do at
10801 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10802 dwarf_tag_name (die
->tag
));
10808 sym
->hash_next
= objfile
->template_symbols
;
10809 objfile
->template_symbols
= sym
;
10810 list_to_add
= NULL
;
10813 if (list_to_add
!= NULL
)
10814 add_symbol_to_list (sym
, list_to_add
);
10816 /* For the benefit of old versions of GCC, check for anonymous
10817 namespaces based on the demangled name. */
10818 if (!processing_has_namespace_info
10819 && cu
->language
== language_cplus
)
10820 cp_scan_for_anonymous_namespaces (sym
);
10825 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10827 static struct symbol
*
10828 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10830 return new_symbol_full (die
, type
, cu
, NULL
);
10833 /* Given an attr with a DW_FORM_dataN value in host byte order,
10834 zero-extend it as appropriate for the symbol's type. The DWARF
10835 standard (v4) is not entirely clear about the meaning of using
10836 DW_FORM_dataN for a constant with a signed type, where the type is
10837 wider than the data. The conclusion of a discussion on the DWARF
10838 list was that this is unspecified. We choose to always zero-extend
10839 because that is the interpretation long in use by GCC. */
10842 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10843 const char *name
, struct obstack
*obstack
,
10844 struct dwarf2_cu
*cu
, long *value
, int bits
)
10846 struct objfile
*objfile
= cu
->objfile
;
10847 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10848 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10849 LONGEST l
= DW_UNSND (attr
);
10851 if (bits
< sizeof (*value
) * 8)
10853 l
&= ((LONGEST
) 1 << bits
) - 1;
10856 else if (bits
== sizeof (*value
) * 8)
10860 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10861 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10868 /* Read a constant value from an attribute. Either set *VALUE, or if
10869 the value does not fit in *VALUE, set *BYTES - either already
10870 allocated on the objfile obstack, or newly allocated on OBSTACK,
10871 or, set *BATON, if we translated the constant to a location
10875 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10876 const char *name
, struct obstack
*obstack
,
10877 struct dwarf2_cu
*cu
,
10878 long *value
, gdb_byte
**bytes
,
10879 struct dwarf2_locexpr_baton
**baton
)
10881 struct objfile
*objfile
= cu
->objfile
;
10882 struct comp_unit_head
*cu_header
= &cu
->header
;
10883 struct dwarf_block
*blk
;
10884 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10885 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10891 switch (attr
->form
)
10897 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
10898 dwarf2_const_value_length_mismatch_complaint (name
,
10899 cu_header
->addr_size
,
10900 TYPE_LENGTH (type
));
10901 /* Symbols of this form are reasonably rare, so we just
10902 piggyback on the existing location code rather than writing
10903 a new implementation of symbol_computed_ops. */
10904 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
10905 sizeof (struct dwarf2_locexpr_baton
));
10906 (*baton
)->per_cu
= cu
->per_cu
;
10907 gdb_assert ((*baton
)->per_cu
);
10909 (*baton
)->size
= 2 + cu_header
->addr_size
;
10910 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
10911 (*baton
)->data
= data
;
10913 data
[0] = DW_OP_addr
;
10914 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
10915 byte_order
, DW_ADDR (attr
));
10916 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
10919 case DW_FORM_string
:
10921 /* DW_STRING is already allocated on the objfile obstack, point
10923 *bytes
= (gdb_byte
*) DW_STRING (attr
);
10925 case DW_FORM_block1
:
10926 case DW_FORM_block2
:
10927 case DW_FORM_block4
:
10928 case DW_FORM_block
:
10929 case DW_FORM_exprloc
:
10930 blk
= DW_BLOCK (attr
);
10931 if (TYPE_LENGTH (type
) != blk
->size
)
10932 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
10933 TYPE_LENGTH (type
));
10934 *bytes
= blk
->data
;
10937 /* The DW_AT_const_value attributes are supposed to carry the
10938 symbol's value "represented as it would be on the target
10939 architecture." By the time we get here, it's already been
10940 converted to host endianness, so we just need to sign- or
10941 zero-extend it as appropriate. */
10942 case DW_FORM_data1
:
10943 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
10945 case DW_FORM_data2
:
10946 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
10948 case DW_FORM_data4
:
10949 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
10951 case DW_FORM_data8
:
10952 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
10955 case DW_FORM_sdata
:
10956 *value
= DW_SND (attr
);
10959 case DW_FORM_udata
:
10960 *value
= DW_UNSND (attr
);
10964 complaint (&symfile_complaints
,
10965 _("unsupported const value attribute form: '%s'"),
10966 dwarf_form_name (attr
->form
));
10973 /* Copy constant value from an attribute to a symbol. */
10976 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
10977 struct dwarf2_cu
*cu
)
10979 struct objfile
*objfile
= cu
->objfile
;
10980 struct comp_unit_head
*cu_header
= &cu
->header
;
10983 struct dwarf2_locexpr_baton
*baton
;
10985 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
10986 SYMBOL_PRINT_NAME (sym
),
10987 &objfile
->objfile_obstack
, cu
,
10988 &value
, &bytes
, &baton
);
10992 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
10993 SYMBOL_LOCATION_BATON (sym
) = baton
;
10994 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10996 else if (bytes
!= NULL
)
10998 SYMBOL_VALUE_BYTES (sym
) = bytes
;
10999 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11003 SYMBOL_VALUE (sym
) = value
;
11004 SYMBOL_CLASS (sym
) = LOC_CONST
;
11008 /* Return the type of the die in question using its DW_AT_type attribute. */
11010 static struct type
*
11011 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11013 struct attribute
*type_attr
;
11015 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11018 /* A missing DW_AT_type represents a void type. */
11019 return objfile_type (cu
->objfile
)->builtin_void
;
11022 return lookup_die_type (die
, type_attr
, cu
);
11025 /* True iff CU's producer generates GNAT Ada auxiliary information
11026 that allows to find parallel types through that information instead
11027 of having to do expensive parallel lookups by type name. */
11030 need_gnat_info (struct dwarf2_cu
*cu
)
11032 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11033 of GNAT produces this auxiliary information, without any indication
11034 that it is produced. Part of enhancing the FSF version of GNAT
11035 to produce that information will be to put in place an indicator
11036 that we can use in order to determine whether the descriptive type
11037 info is available or not. One suggestion that has been made is
11038 to use a new attribute, attached to the CU die. For now, assume
11039 that the descriptive type info is not available. */
11043 /* Return the auxiliary type of the die in question using its
11044 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11045 attribute is not present. */
11047 static struct type
*
11048 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11050 struct attribute
*type_attr
;
11052 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11056 return lookup_die_type (die
, type_attr
, cu
);
11059 /* If DIE has a descriptive_type attribute, then set the TYPE's
11060 descriptive type accordingly. */
11063 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11064 struct dwarf2_cu
*cu
)
11066 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11068 if (descriptive_type
)
11070 ALLOCATE_GNAT_AUX_TYPE (type
);
11071 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11075 /* Return the containing type of the die in question using its
11076 DW_AT_containing_type attribute. */
11078 static struct type
*
11079 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11081 struct attribute
*type_attr
;
11083 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11085 error (_("Dwarf Error: Problem turning containing type into gdb type "
11086 "[in module %s]"), cu
->objfile
->name
);
11088 return lookup_die_type (die
, type_attr
, cu
);
11091 /* Look up the type of DIE in CU using its type attribute ATTR.
11092 If there is no type substitute an error marker. */
11094 static struct type
*
11095 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11096 struct dwarf2_cu
*cu
)
11098 struct type
*this_type
;
11100 /* First see if we have it cached. */
11102 if (is_ref_attr (attr
))
11104 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11106 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11108 else if (attr
->form
== DW_FORM_sig8
)
11110 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11111 struct dwarf2_cu
*sig_cu
;
11112 unsigned int offset
;
11114 /* sig_type will be NULL if the signatured type is missing from
11116 if (sig_type
== NULL
)
11117 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11118 "at 0x%x [in module %s]"),
11119 die
->offset
, cu
->objfile
->name
);
11121 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11122 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11123 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11127 dump_die_for_error (die
);
11128 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11129 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11132 /* If not cached we need to read it in. */
11134 if (this_type
== NULL
)
11136 struct die_info
*type_die
;
11137 struct dwarf2_cu
*type_cu
= cu
;
11139 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11140 /* If the type is cached, we should have found it above. */
11141 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11142 this_type
= read_type_die_1 (type_die
, type_cu
);
11145 /* If we still don't have a type use an error marker. */
11147 if (this_type
== NULL
)
11149 char *message
, *saved
;
11151 /* read_type_die already issued a complaint. */
11152 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11156 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11157 message
, strlen (message
));
11160 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11166 /* Return the type in DIE, CU.
11167 Returns NULL for invalid types.
11169 This first does a lookup in the appropriate type_hash table,
11170 and only reads the die in if necessary.
11172 NOTE: This can be called when reading in partial or full symbols. */
11174 static struct type
*
11175 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11177 struct type
*this_type
;
11179 this_type
= get_die_type (die
, cu
);
11183 return read_type_die_1 (die
, cu
);
11186 /* Read the type in DIE, CU.
11187 Returns NULL for invalid types. */
11189 static struct type
*
11190 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11192 struct type
*this_type
= NULL
;
11196 case DW_TAG_class_type
:
11197 case DW_TAG_interface_type
:
11198 case DW_TAG_structure_type
:
11199 case DW_TAG_union_type
:
11200 this_type
= read_structure_type (die
, cu
);
11202 case DW_TAG_enumeration_type
:
11203 this_type
= read_enumeration_type (die
, cu
);
11205 case DW_TAG_subprogram
:
11206 case DW_TAG_subroutine_type
:
11207 case DW_TAG_inlined_subroutine
:
11208 this_type
= read_subroutine_type (die
, cu
);
11210 case DW_TAG_array_type
:
11211 this_type
= read_array_type (die
, cu
);
11213 case DW_TAG_set_type
:
11214 this_type
= read_set_type (die
, cu
);
11216 case DW_TAG_pointer_type
:
11217 this_type
= read_tag_pointer_type (die
, cu
);
11219 case DW_TAG_ptr_to_member_type
:
11220 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11222 case DW_TAG_reference_type
:
11223 this_type
= read_tag_reference_type (die
, cu
);
11225 case DW_TAG_const_type
:
11226 this_type
= read_tag_const_type (die
, cu
);
11228 case DW_TAG_volatile_type
:
11229 this_type
= read_tag_volatile_type (die
, cu
);
11231 case DW_TAG_string_type
:
11232 this_type
= read_tag_string_type (die
, cu
);
11234 case DW_TAG_typedef
:
11235 this_type
= read_typedef (die
, cu
);
11237 case DW_TAG_subrange_type
:
11238 this_type
= read_subrange_type (die
, cu
);
11240 case DW_TAG_base_type
:
11241 this_type
= read_base_type (die
, cu
);
11243 case DW_TAG_unspecified_type
:
11244 this_type
= read_unspecified_type (die
, cu
);
11246 case DW_TAG_namespace
:
11247 this_type
= read_namespace_type (die
, cu
);
11249 case DW_TAG_module
:
11250 this_type
= read_module_type (die
, cu
);
11253 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11254 dwarf_tag_name (die
->tag
));
11261 /* Return the name of the namespace/class that DIE is defined within,
11262 or "" if we can't tell. The caller should not xfree the result.
11264 For example, if we're within the method foo() in the following
11274 then determine_prefix on foo's die will return "N::C". */
11277 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11279 struct die_info
*parent
, *spec_die
;
11280 struct dwarf2_cu
*spec_cu
;
11281 struct type
*parent_type
;
11283 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11284 && cu
->language
!= language_fortran
)
11287 /* We have to be careful in the presence of DW_AT_specification.
11288 For example, with GCC 3.4, given the code
11292 // Definition of N::foo.
11296 then we'll have a tree of DIEs like this:
11298 1: DW_TAG_compile_unit
11299 2: DW_TAG_namespace // N
11300 3: DW_TAG_subprogram // declaration of N::foo
11301 4: DW_TAG_subprogram // definition of N::foo
11302 DW_AT_specification // refers to die #3
11304 Thus, when processing die #4, we have to pretend that we're in
11305 the context of its DW_AT_specification, namely the contex of die
11308 spec_die
= die_specification (die
, &spec_cu
);
11309 if (spec_die
== NULL
)
11310 parent
= die
->parent
;
11313 parent
= spec_die
->parent
;
11317 if (parent
== NULL
)
11319 else if (parent
->building_fullname
)
11322 const char *parent_name
;
11324 /* It has been seen on RealView 2.2 built binaries,
11325 DW_TAG_template_type_param types actually _defined_ as
11326 children of the parent class:
11329 template class <class Enum> Class{};
11330 Class<enum E> class_e;
11332 1: DW_TAG_class_type (Class)
11333 2: DW_TAG_enumeration_type (E)
11334 3: DW_TAG_enumerator (enum1:0)
11335 3: DW_TAG_enumerator (enum2:1)
11337 2: DW_TAG_template_type_param
11338 DW_AT_type DW_FORM_ref_udata (E)
11340 Besides being broken debug info, it can put GDB into an
11341 infinite loop. Consider:
11343 When we're building the full name for Class<E>, we'll start
11344 at Class, and go look over its template type parameters,
11345 finding E. We'll then try to build the full name of E, and
11346 reach here. We're now trying to build the full name of E,
11347 and look over the parent DIE for containing scope. In the
11348 broken case, if we followed the parent DIE of E, we'd again
11349 find Class, and once again go look at its template type
11350 arguments, etc., etc. Simply don't consider such parent die
11351 as source-level parent of this die (it can't be, the language
11352 doesn't allow it), and break the loop here. */
11353 name
= dwarf2_name (die
, cu
);
11354 parent_name
= dwarf2_name (parent
, cu
);
11355 complaint (&symfile_complaints
,
11356 _("template param type '%s' defined within parent '%s'"),
11357 name
? name
: "<unknown>",
11358 parent_name
? parent_name
: "<unknown>");
11362 switch (parent
->tag
)
11364 case DW_TAG_namespace
:
11365 parent_type
= read_type_die (parent
, cu
);
11366 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11367 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11368 Work around this problem here. */
11369 if (cu
->language
== language_cplus
11370 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11372 /* We give a name to even anonymous namespaces. */
11373 return TYPE_TAG_NAME (parent_type
);
11374 case DW_TAG_class_type
:
11375 case DW_TAG_interface_type
:
11376 case DW_TAG_structure_type
:
11377 case DW_TAG_union_type
:
11378 case DW_TAG_module
:
11379 parent_type
= read_type_die (parent
, cu
);
11380 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11381 return TYPE_TAG_NAME (parent_type
);
11383 /* An anonymous structure is only allowed non-static data
11384 members; no typedefs, no member functions, et cetera.
11385 So it does not need a prefix. */
11388 return determine_prefix (parent
, cu
);
11392 /* Return a newly-allocated string formed by concatenating PREFIX and
11393 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11394 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11395 perform an obconcat, otherwise allocate storage for the result. The CU argument
11396 is used to determine the language and hence, the appropriate separator. */
11398 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11401 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11402 int physname
, struct dwarf2_cu
*cu
)
11404 const char *lead
= "";
11407 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11409 else if (cu
->language
== language_java
)
11411 else if (cu
->language
== language_fortran
&& physname
)
11413 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11414 DW_AT_MIPS_linkage_name is preferred and used instead. */
11422 if (prefix
== NULL
)
11424 if (suffix
== NULL
)
11429 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11431 strcpy (retval
, lead
);
11432 strcat (retval
, prefix
);
11433 strcat (retval
, sep
);
11434 strcat (retval
, suffix
);
11439 /* We have an obstack. */
11440 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11444 /* Return sibling of die, NULL if no sibling. */
11446 static struct die_info
*
11447 sibling_die (struct die_info
*die
)
11449 return die
->sibling
;
11452 /* Get name of a die, return NULL if not found. */
11455 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11456 struct obstack
*obstack
)
11458 if (name
&& cu
->language
== language_cplus
)
11460 char *canon_name
= cp_canonicalize_string (name
);
11462 if (canon_name
!= NULL
)
11464 if (strcmp (canon_name
, name
) != 0)
11465 name
= obsavestring (canon_name
, strlen (canon_name
),
11467 xfree (canon_name
);
11474 /* Get name of a die, return NULL if not found. */
11477 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11479 struct attribute
*attr
;
11481 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11482 if (!attr
|| !DW_STRING (attr
))
11487 case DW_TAG_compile_unit
:
11488 /* Compilation units have a DW_AT_name that is a filename, not
11489 a source language identifier. */
11490 case DW_TAG_enumeration_type
:
11491 case DW_TAG_enumerator
:
11492 /* These tags always have simple identifiers already; no need
11493 to canonicalize them. */
11494 return DW_STRING (attr
);
11496 case DW_TAG_subprogram
:
11497 /* Java constructors will all be named "<init>", so return
11498 the class name when we see this special case. */
11499 if (cu
->language
== language_java
11500 && DW_STRING (attr
) != NULL
11501 && strcmp (DW_STRING (attr
), "<init>") == 0)
11503 struct dwarf2_cu
*spec_cu
= cu
;
11504 struct die_info
*spec_die
;
11506 /* GCJ will output '<init>' for Java constructor names.
11507 For this special case, return the name of the parent class. */
11509 /* GCJ may output suprogram DIEs with AT_specification set.
11510 If so, use the name of the specified DIE. */
11511 spec_die
= die_specification (die
, &spec_cu
);
11512 if (spec_die
!= NULL
)
11513 return dwarf2_name (spec_die
, spec_cu
);
11518 if (die
->tag
== DW_TAG_class_type
)
11519 return dwarf2_name (die
, cu
);
11521 while (die
->tag
!= DW_TAG_compile_unit
);
11525 case DW_TAG_class_type
:
11526 case DW_TAG_interface_type
:
11527 case DW_TAG_structure_type
:
11528 case DW_TAG_union_type
:
11529 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11530 structures or unions. These were of the form "._%d" in GCC 4.1,
11531 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11532 and GCC 4.4. We work around this problem by ignoring these. */
11533 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11534 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11542 if (!DW_STRING_IS_CANONICAL (attr
))
11545 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11546 &cu
->objfile
->objfile_obstack
);
11547 DW_STRING_IS_CANONICAL (attr
) = 1;
11549 return DW_STRING (attr
);
11552 /* Return the die that this die in an extension of, or NULL if there
11553 is none. *EXT_CU is the CU containing DIE on input, and the CU
11554 containing the return value on output. */
11556 static struct die_info
*
11557 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11559 struct attribute
*attr
;
11561 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11565 return follow_die_ref (die
, attr
, ext_cu
);
11568 /* Convert a DIE tag into its string name. */
11571 dwarf_tag_name (unsigned tag
)
11575 case DW_TAG_padding
:
11576 return "DW_TAG_padding";
11577 case DW_TAG_array_type
:
11578 return "DW_TAG_array_type";
11579 case DW_TAG_class_type
:
11580 return "DW_TAG_class_type";
11581 case DW_TAG_entry_point
:
11582 return "DW_TAG_entry_point";
11583 case DW_TAG_enumeration_type
:
11584 return "DW_TAG_enumeration_type";
11585 case DW_TAG_formal_parameter
:
11586 return "DW_TAG_formal_parameter";
11587 case DW_TAG_imported_declaration
:
11588 return "DW_TAG_imported_declaration";
11590 return "DW_TAG_label";
11591 case DW_TAG_lexical_block
:
11592 return "DW_TAG_lexical_block";
11593 case DW_TAG_member
:
11594 return "DW_TAG_member";
11595 case DW_TAG_pointer_type
:
11596 return "DW_TAG_pointer_type";
11597 case DW_TAG_reference_type
:
11598 return "DW_TAG_reference_type";
11599 case DW_TAG_compile_unit
:
11600 return "DW_TAG_compile_unit";
11601 case DW_TAG_string_type
:
11602 return "DW_TAG_string_type";
11603 case DW_TAG_structure_type
:
11604 return "DW_TAG_structure_type";
11605 case DW_TAG_subroutine_type
:
11606 return "DW_TAG_subroutine_type";
11607 case DW_TAG_typedef
:
11608 return "DW_TAG_typedef";
11609 case DW_TAG_union_type
:
11610 return "DW_TAG_union_type";
11611 case DW_TAG_unspecified_parameters
:
11612 return "DW_TAG_unspecified_parameters";
11613 case DW_TAG_variant
:
11614 return "DW_TAG_variant";
11615 case DW_TAG_common_block
:
11616 return "DW_TAG_common_block";
11617 case DW_TAG_common_inclusion
:
11618 return "DW_TAG_common_inclusion";
11619 case DW_TAG_inheritance
:
11620 return "DW_TAG_inheritance";
11621 case DW_TAG_inlined_subroutine
:
11622 return "DW_TAG_inlined_subroutine";
11623 case DW_TAG_module
:
11624 return "DW_TAG_module";
11625 case DW_TAG_ptr_to_member_type
:
11626 return "DW_TAG_ptr_to_member_type";
11627 case DW_TAG_set_type
:
11628 return "DW_TAG_set_type";
11629 case DW_TAG_subrange_type
:
11630 return "DW_TAG_subrange_type";
11631 case DW_TAG_with_stmt
:
11632 return "DW_TAG_with_stmt";
11633 case DW_TAG_access_declaration
:
11634 return "DW_TAG_access_declaration";
11635 case DW_TAG_base_type
:
11636 return "DW_TAG_base_type";
11637 case DW_TAG_catch_block
:
11638 return "DW_TAG_catch_block";
11639 case DW_TAG_const_type
:
11640 return "DW_TAG_const_type";
11641 case DW_TAG_constant
:
11642 return "DW_TAG_constant";
11643 case DW_TAG_enumerator
:
11644 return "DW_TAG_enumerator";
11645 case DW_TAG_file_type
:
11646 return "DW_TAG_file_type";
11647 case DW_TAG_friend
:
11648 return "DW_TAG_friend";
11649 case DW_TAG_namelist
:
11650 return "DW_TAG_namelist";
11651 case DW_TAG_namelist_item
:
11652 return "DW_TAG_namelist_item";
11653 case DW_TAG_packed_type
:
11654 return "DW_TAG_packed_type";
11655 case DW_TAG_subprogram
:
11656 return "DW_TAG_subprogram";
11657 case DW_TAG_template_type_param
:
11658 return "DW_TAG_template_type_param";
11659 case DW_TAG_template_value_param
:
11660 return "DW_TAG_template_value_param";
11661 case DW_TAG_thrown_type
:
11662 return "DW_TAG_thrown_type";
11663 case DW_TAG_try_block
:
11664 return "DW_TAG_try_block";
11665 case DW_TAG_variant_part
:
11666 return "DW_TAG_variant_part";
11667 case DW_TAG_variable
:
11668 return "DW_TAG_variable";
11669 case DW_TAG_volatile_type
:
11670 return "DW_TAG_volatile_type";
11671 case DW_TAG_dwarf_procedure
:
11672 return "DW_TAG_dwarf_procedure";
11673 case DW_TAG_restrict_type
:
11674 return "DW_TAG_restrict_type";
11675 case DW_TAG_interface_type
:
11676 return "DW_TAG_interface_type";
11677 case DW_TAG_namespace
:
11678 return "DW_TAG_namespace";
11679 case DW_TAG_imported_module
:
11680 return "DW_TAG_imported_module";
11681 case DW_TAG_unspecified_type
:
11682 return "DW_TAG_unspecified_type";
11683 case DW_TAG_partial_unit
:
11684 return "DW_TAG_partial_unit";
11685 case DW_TAG_imported_unit
:
11686 return "DW_TAG_imported_unit";
11687 case DW_TAG_condition
:
11688 return "DW_TAG_condition";
11689 case DW_TAG_shared_type
:
11690 return "DW_TAG_shared_type";
11691 case DW_TAG_type_unit
:
11692 return "DW_TAG_type_unit";
11693 case DW_TAG_MIPS_loop
:
11694 return "DW_TAG_MIPS_loop";
11695 case DW_TAG_HP_array_descriptor
:
11696 return "DW_TAG_HP_array_descriptor";
11697 case DW_TAG_format_label
:
11698 return "DW_TAG_format_label";
11699 case DW_TAG_function_template
:
11700 return "DW_TAG_function_template";
11701 case DW_TAG_class_template
:
11702 return "DW_TAG_class_template";
11703 case DW_TAG_GNU_BINCL
:
11704 return "DW_TAG_GNU_BINCL";
11705 case DW_TAG_GNU_EINCL
:
11706 return "DW_TAG_GNU_EINCL";
11707 case DW_TAG_upc_shared_type
:
11708 return "DW_TAG_upc_shared_type";
11709 case DW_TAG_upc_strict_type
:
11710 return "DW_TAG_upc_strict_type";
11711 case DW_TAG_upc_relaxed_type
:
11712 return "DW_TAG_upc_relaxed_type";
11713 case DW_TAG_PGI_kanji_type
:
11714 return "DW_TAG_PGI_kanji_type";
11715 case DW_TAG_PGI_interface_block
:
11716 return "DW_TAG_PGI_interface_block";
11718 return "DW_TAG_<unknown>";
11722 /* Convert a DWARF attribute code into its string name. */
11725 dwarf_attr_name (unsigned attr
)
11729 case DW_AT_sibling
:
11730 return "DW_AT_sibling";
11731 case DW_AT_location
:
11732 return "DW_AT_location";
11734 return "DW_AT_name";
11735 case DW_AT_ordering
:
11736 return "DW_AT_ordering";
11737 case DW_AT_subscr_data
:
11738 return "DW_AT_subscr_data";
11739 case DW_AT_byte_size
:
11740 return "DW_AT_byte_size";
11741 case DW_AT_bit_offset
:
11742 return "DW_AT_bit_offset";
11743 case DW_AT_bit_size
:
11744 return "DW_AT_bit_size";
11745 case DW_AT_element_list
:
11746 return "DW_AT_element_list";
11747 case DW_AT_stmt_list
:
11748 return "DW_AT_stmt_list";
11750 return "DW_AT_low_pc";
11751 case DW_AT_high_pc
:
11752 return "DW_AT_high_pc";
11753 case DW_AT_language
:
11754 return "DW_AT_language";
11756 return "DW_AT_member";
11758 return "DW_AT_discr";
11759 case DW_AT_discr_value
:
11760 return "DW_AT_discr_value";
11761 case DW_AT_visibility
:
11762 return "DW_AT_visibility";
11764 return "DW_AT_import";
11765 case DW_AT_string_length
:
11766 return "DW_AT_string_length";
11767 case DW_AT_common_reference
:
11768 return "DW_AT_common_reference";
11769 case DW_AT_comp_dir
:
11770 return "DW_AT_comp_dir";
11771 case DW_AT_const_value
:
11772 return "DW_AT_const_value";
11773 case DW_AT_containing_type
:
11774 return "DW_AT_containing_type";
11775 case DW_AT_default_value
:
11776 return "DW_AT_default_value";
11778 return "DW_AT_inline";
11779 case DW_AT_is_optional
:
11780 return "DW_AT_is_optional";
11781 case DW_AT_lower_bound
:
11782 return "DW_AT_lower_bound";
11783 case DW_AT_producer
:
11784 return "DW_AT_producer";
11785 case DW_AT_prototyped
:
11786 return "DW_AT_prototyped";
11787 case DW_AT_return_addr
:
11788 return "DW_AT_return_addr";
11789 case DW_AT_start_scope
:
11790 return "DW_AT_start_scope";
11791 case DW_AT_bit_stride
:
11792 return "DW_AT_bit_stride";
11793 case DW_AT_upper_bound
:
11794 return "DW_AT_upper_bound";
11795 case DW_AT_abstract_origin
:
11796 return "DW_AT_abstract_origin";
11797 case DW_AT_accessibility
:
11798 return "DW_AT_accessibility";
11799 case DW_AT_address_class
:
11800 return "DW_AT_address_class";
11801 case DW_AT_artificial
:
11802 return "DW_AT_artificial";
11803 case DW_AT_base_types
:
11804 return "DW_AT_base_types";
11805 case DW_AT_calling_convention
:
11806 return "DW_AT_calling_convention";
11808 return "DW_AT_count";
11809 case DW_AT_data_member_location
:
11810 return "DW_AT_data_member_location";
11811 case DW_AT_decl_column
:
11812 return "DW_AT_decl_column";
11813 case DW_AT_decl_file
:
11814 return "DW_AT_decl_file";
11815 case DW_AT_decl_line
:
11816 return "DW_AT_decl_line";
11817 case DW_AT_declaration
:
11818 return "DW_AT_declaration";
11819 case DW_AT_discr_list
:
11820 return "DW_AT_discr_list";
11821 case DW_AT_encoding
:
11822 return "DW_AT_encoding";
11823 case DW_AT_external
:
11824 return "DW_AT_external";
11825 case DW_AT_frame_base
:
11826 return "DW_AT_frame_base";
11828 return "DW_AT_friend";
11829 case DW_AT_identifier_case
:
11830 return "DW_AT_identifier_case";
11831 case DW_AT_macro_info
:
11832 return "DW_AT_macro_info";
11833 case DW_AT_namelist_items
:
11834 return "DW_AT_namelist_items";
11835 case DW_AT_priority
:
11836 return "DW_AT_priority";
11837 case DW_AT_segment
:
11838 return "DW_AT_segment";
11839 case DW_AT_specification
:
11840 return "DW_AT_specification";
11841 case DW_AT_static_link
:
11842 return "DW_AT_static_link";
11844 return "DW_AT_type";
11845 case DW_AT_use_location
:
11846 return "DW_AT_use_location";
11847 case DW_AT_variable_parameter
:
11848 return "DW_AT_variable_parameter";
11849 case DW_AT_virtuality
:
11850 return "DW_AT_virtuality";
11851 case DW_AT_vtable_elem_location
:
11852 return "DW_AT_vtable_elem_location";
11853 /* DWARF 3 values. */
11854 case DW_AT_allocated
:
11855 return "DW_AT_allocated";
11856 case DW_AT_associated
:
11857 return "DW_AT_associated";
11858 case DW_AT_data_location
:
11859 return "DW_AT_data_location";
11860 case DW_AT_byte_stride
:
11861 return "DW_AT_byte_stride";
11862 case DW_AT_entry_pc
:
11863 return "DW_AT_entry_pc";
11864 case DW_AT_use_UTF8
:
11865 return "DW_AT_use_UTF8";
11866 case DW_AT_extension
:
11867 return "DW_AT_extension";
11869 return "DW_AT_ranges";
11870 case DW_AT_trampoline
:
11871 return "DW_AT_trampoline";
11872 case DW_AT_call_column
:
11873 return "DW_AT_call_column";
11874 case DW_AT_call_file
:
11875 return "DW_AT_call_file";
11876 case DW_AT_call_line
:
11877 return "DW_AT_call_line";
11878 case DW_AT_description
:
11879 return "DW_AT_description";
11880 case DW_AT_binary_scale
:
11881 return "DW_AT_binary_scale";
11882 case DW_AT_decimal_scale
:
11883 return "DW_AT_decimal_scale";
11885 return "DW_AT_small";
11886 case DW_AT_decimal_sign
:
11887 return "DW_AT_decimal_sign";
11888 case DW_AT_digit_count
:
11889 return "DW_AT_digit_count";
11890 case DW_AT_picture_string
:
11891 return "DW_AT_picture_string";
11892 case DW_AT_mutable
:
11893 return "DW_AT_mutable";
11894 case DW_AT_threads_scaled
:
11895 return "DW_AT_threads_scaled";
11896 case DW_AT_explicit
:
11897 return "DW_AT_explicit";
11898 case DW_AT_object_pointer
:
11899 return "DW_AT_object_pointer";
11900 case DW_AT_endianity
:
11901 return "DW_AT_endianity";
11902 case DW_AT_elemental
:
11903 return "DW_AT_elemental";
11905 return "DW_AT_pure";
11906 case DW_AT_recursive
:
11907 return "DW_AT_recursive";
11908 /* DWARF 4 values. */
11909 case DW_AT_signature
:
11910 return "DW_AT_signature";
11911 case DW_AT_linkage_name
:
11912 return "DW_AT_linkage_name";
11913 /* SGI/MIPS extensions. */
11914 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11915 case DW_AT_MIPS_fde
:
11916 return "DW_AT_MIPS_fde";
11918 case DW_AT_MIPS_loop_begin
:
11919 return "DW_AT_MIPS_loop_begin";
11920 case DW_AT_MIPS_tail_loop_begin
:
11921 return "DW_AT_MIPS_tail_loop_begin";
11922 case DW_AT_MIPS_epilog_begin
:
11923 return "DW_AT_MIPS_epilog_begin";
11924 case DW_AT_MIPS_loop_unroll_factor
:
11925 return "DW_AT_MIPS_loop_unroll_factor";
11926 case DW_AT_MIPS_software_pipeline_depth
:
11927 return "DW_AT_MIPS_software_pipeline_depth";
11928 case DW_AT_MIPS_linkage_name
:
11929 return "DW_AT_MIPS_linkage_name";
11930 case DW_AT_MIPS_stride
:
11931 return "DW_AT_MIPS_stride";
11932 case DW_AT_MIPS_abstract_name
:
11933 return "DW_AT_MIPS_abstract_name";
11934 case DW_AT_MIPS_clone_origin
:
11935 return "DW_AT_MIPS_clone_origin";
11936 case DW_AT_MIPS_has_inlines
:
11937 return "DW_AT_MIPS_has_inlines";
11938 /* HP extensions. */
11939 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11940 case DW_AT_HP_block_index
:
11941 return "DW_AT_HP_block_index";
11943 case DW_AT_HP_unmodifiable
:
11944 return "DW_AT_HP_unmodifiable";
11945 case DW_AT_HP_actuals_stmt_list
:
11946 return "DW_AT_HP_actuals_stmt_list";
11947 case DW_AT_HP_proc_per_section
:
11948 return "DW_AT_HP_proc_per_section";
11949 case DW_AT_HP_raw_data_ptr
:
11950 return "DW_AT_HP_raw_data_ptr";
11951 case DW_AT_HP_pass_by_reference
:
11952 return "DW_AT_HP_pass_by_reference";
11953 case DW_AT_HP_opt_level
:
11954 return "DW_AT_HP_opt_level";
11955 case DW_AT_HP_prof_version_id
:
11956 return "DW_AT_HP_prof_version_id";
11957 case DW_AT_HP_opt_flags
:
11958 return "DW_AT_HP_opt_flags";
11959 case DW_AT_HP_cold_region_low_pc
:
11960 return "DW_AT_HP_cold_region_low_pc";
11961 case DW_AT_HP_cold_region_high_pc
:
11962 return "DW_AT_HP_cold_region_high_pc";
11963 case DW_AT_HP_all_variables_modifiable
:
11964 return "DW_AT_HP_all_variables_modifiable";
11965 case DW_AT_HP_linkage_name
:
11966 return "DW_AT_HP_linkage_name";
11967 case DW_AT_HP_prof_flags
:
11968 return "DW_AT_HP_prof_flags";
11969 /* GNU extensions. */
11970 case DW_AT_sf_names
:
11971 return "DW_AT_sf_names";
11972 case DW_AT_src_info
:
11973 return "DW_AT_src_info";
11974 case DW_AT_mac_info
:
11975 return "DW_AT_mac_info";
11976 case DW_AT_src_coords
:
11977 return "DW_AT_src_coords";
11978 case DW_AT_body_begin
:
11979 return "DW_AT_body_begin";
11980 case DW_AT_body_end
:
11981 return "DW_AT_body_end";
11982 case DW_AT_GNU_vector
:
11983 return "DW_AT_GNU_vector";
11984 case DW_AT_GNU_odr_signature
:
11985 return "DW_AT_GNU_odr_signature";
11986 /* VMS extensions. */
11987 case DW_AT_VMS_rtnbeg_pd_address
:
11988 return "DW_AT_VMS_rtnbeg_pd_address";
11989 /* UPC extension. */
11990 case DW_AT_upc_threads_scaled
:
11991 return "DW_AT_upc_threads_scaled";
11992 /* PGI (STMicroelectronics) extensions. */
11993 case DW_AT_PGI_lbase
:
11994 return "DW_AT_PGI_lbase";
11995 case DW_AT_PGI_soffset
:
11996 return "DW_AT_PGI_soffset";
11997 case DW_AT_PGI_lstride
:
11998 return "DW_AT_PGI_lstride";
12000 return "DW_AT_<unknown>";
12004 /* Convert a DWARF value form code into its string name. */
12007 dwarf_form_name (unsigned form
)
12012 return "DW_FORM_addr";
12013 case DW_FORM_block2
:
12014 return "DW_FORM_block2";
12015 case DW_FORM_block4
:
12016 return "DW_FORM_block4";
12017 case DW_FORM_data2
:
12018 return "DW_FORM_data2";
12019 case DW_FORM_data4
:
12020 return "DW_FORM_data4";
12021 case DW_FORM_data8
:
12022 return "DW_FORM_data8";
12023 case DW_FORM_string
:
12024 return "DW_FORM_string";
12025 case DW_FORM_block
:
12026 return "DW_FORM_block";
12027 case DW_FORM_block1
:
12028 return "DW_FORM_block1";
12029 case DW_FORM_data1
:
12030 return "DW_FORM_data1";
12032 return "DW_FORM_flag";
12033 case DW_FORM_sdata
:
12034 return "DW_FORM_sdata";
12036 return "DW_FORM_strp";
12037 case DW_FORM_udata
:
12038 return "DW_FORM_udata";
12039 case DW_FORM_ref_addr
:
12040 return "DW_FORM_ref_addr";
12042 return "DW_FORM_ref1";
12044 return "DW_FORM_ref2";
12046 return "DW_FORM_ref4";
12048 return "DW_FORM_ref8";
12049 case DW_FORM_ref_udata
:
12050 return "DW_FORM_ref_udata";
12051 case DW_FORM_indirect
:
12052 return "DW_FORM_indirect";
12053 case DW_FORM_sec_offset
:
12054 return "DW_FORM_sec_offset";
12055 case DW_FORM_exprloc
:
12056 return "DW_FORM_exprloc";
12057 case DW_FORM_flag_present
:
12058 return "DW_FORM_flag_present";
12060 return "DW_FORM_sig8";
12062 return "DW_FORM_<unknown>";
12066 /* Convert a DWARF stack opcode into its string name. */
12069 dwarf_stack_op_name (unsigned op
, int def
)
12074 return "DW_OP_addr";
12076 return "DW_OP_deref";
12077 case DW_OP_const1u
:
12078 return "DW_OP_const1u";
12079 case DW_OP_const1s
:
12080 return "DW_OP_const1s";
12081 case DW_OP_const2u
:
12082 return "DW_OP_const2u";
12083 case DW_OP_const2s
:
12084 return "DW_OP_const2s";
12085 case DW_OP_const4u
:
12086 return "DW_OP_const4u";
12087 case DW_OP_const4s
:
12088 return "DW_OP_const4s";
12089 case DW_OP_const8u
:
12090 return "DW_OP_const8u";
12091 case DW_OP_const8s
:
12092 return "DW_OP_const8s";
12094 return "DW_OP_constu";
12096 return "DW_OP_consts";
12098 return "DW_OP_dup";
12100 return "DW_OP_drop";
12102 return "DW_OP_over";
12104 return "DW_OP_pick";
12106 return "DW_OP_swap";
12108 return "DW_OP_rot";
12110 return "DW_OP_xderef";
12112 return "DW_OP_abs";
12114 return "DW_OP_and";
12116 return "DW_OP_div";
12118 return "DW_OP_minus";
12120 return "DW_OP_mod";
12122 return "DW_OP_mul";
12124 return "DW_OP_neg";
12126 return "DW_OP_not";
12130 return "DW_OP_plus";
12131 case DW_OP_plus_uconst
:
12132 return "DW_OP_plus_uconst";
12134 return "DW_OP_shl";
12136 return "DW_OP_shr";
12138 return "DW_OP_shra";
12140 return "DW_OP_xor";
12142 return "DW_OP_bra";
12156 return "DW_OP_skip";
12158 return "DW_OP_lit0";
12160 return "DW_OP_lit1";
12162 return "DW_OP_lit2";
12164 return "DW_OP_lit3";
12166 return "DW_OP_lit4";
12168 return "DW_OP_lit5";
12170 return "DW_OP_lit6";
12172 return "DW_OP_lit7";
12174 return "DW_OP_lit8";
12176 return "DW_OP_lit9";
12178 return "DW_OP_lit10";
12180 return "DW_OP_lit11";
12182 return "DW_OP_lit12";
12184 return "DW_OP_lit13";
12186 return "DW_OP_lit14";
12188 return "DW_OP_lit15";
12190 return "DW_OP_lit16";
12192 return "DW_OP_lit17";
12194 return "DW_OP_lit18";
12196 return "DW_OP_lit19";
12198 return "DW_OP_lit20";
12200 return "DW_OP_lit21";
12202 return "DW_OP_lit22";
12204 return "DW_OP_lit23";
12206 return "DW_OP_lit24";
12208 return "DW_OP_lit25";
12210 return "DW_OP_lit26";
12212 return "DW_OP_lit27";
12214 return "DW_OP_lit28";
12216 return "DW_OP_lit29";
12218 return "DW_OP_lit30";
12220 return "DW_OP_lit31";
12222 return "DW_OP_reg0";
12224 return "DW_OP_reg1";
12226 return "DW_OP_reg2";
12228 return "DW_OP_reg3";
12230 return "DW_OP_reg4";
12232 return "DW_OP_reg5";
12234 return "DW_OP_reg6";
12236 return "DW_OP_reg7";
12238 return "DW_OP_reg8";
12240 return "DW_OP_reg9";
12242 return "DW_OP_reg10";
12244 return "DW_OP_reg11";
12246 return "DW_OP_reg12";
12248 return "DW_OP_reg13";
12250 return "DW_OP_reg14";
12252 return "DW_OP_reg15";
12254 return "DW_OP_reg16";
12256 return "DW_OP_reg17";
12258 return "DW_OP_reg18";
12260 return "DW_OP_reg19";
12262 return "DW_OP_reg20";
12264 return "DW_OP_reg21";
12266 return "DW_OP_reg22";
12268 return "DW_OP_reg23";
12270 return "DW_OP_reg24";
12272 return "DW_OP_reg25";
12274 return "DW_OP_reg26";
12276 return "DW_OP_reg27";
12278 return "DW_OP_reg28";
12280 return "DW_OP_reg29";
12282 return "DW_OP_reg30";
12284 return "DW_OP_reg31";
12286 return "DW_OP_breg0";
12288 return "DW_OP_breg1";
12290 return "DW_OP_breg2";
12292 return "DW_OP_breg3";
12294 return "DW_OP_breg4";
12296 return "DW_OP_breg5";
12298 return "DW_OP_breg6";
12300 return "DW_OP_breg7";
12302 return "DW_OP_breg8";
12304 return "DW_OP_breg9";
12306 return "DW_OP_breg10";
12308 return "DW_OP_breg11";
12310 return "DW_OP_breg12";
12312 return "DW_OP_breg13";
12314 return "DW_OP_breg14";
12316 return "DW_OP_breg15";
12318 return "DW_OP_breg16";
12320 return "DW_OP_breg17";
12322 return "DW_OP_breg18";
12324 return "DW_OP_breg19";
12326 return "DW_OP_breg20";
12328 return "DW_OP_breg21";
12330 return "DW_OP_breg22";
12332 return "DW_OP_breg23";
12334 return "DW_OP_breg24";
12336 return "DW_OP_breg25";
12338 return "DW_OP_breg26";
12340 return "DW_OP_breg27";
12342 return "DW_OP_breg28";
12344 return "DW_OP_breg29";
12346 return "DW_OP_breg30";
12348 return "DW_OP_breg31";
12350 return "DW_OP_regx";
12352 return "DW_OP_fbreg";
12354 return "DW_OP_bregx";
12356 return "DW_OP_piece";
12357 case DW_OP_deref_size
:
12358 return "DW_OP_deref_size";
12359 case DW_OP_xderef_size
:
12360 return "DW_OP_xderef_size";
12362 return "DW_OP_nop";
12363 /* DWARF 3 extensions. */
12364 case DW_OP_push_object_address
:
12365 return "DW_OP_push_object_address";
12367 return "DW_OP_call2";
12369 return "DW_OP_call4";
12370 case DW_OP_call_ref
:
12371 return "DW_OP_call_ref";
12372 case DW_OP_form_tls_address
:
12373 return "DW_OP_form_tls_address";
12374 case DW_OP_call_frame_cfa
:
12375 return "DW_OP_call_frame_cfa";
12376 case DW_OP_bit_piece
:
12377 return "DW_OP_bit_piece";
12378 /* DWARF 4 extensions. */
12379 case DW_OP_implicit_value
:
12380 return "DW_OP_implicit_value";
12381 case DW_OP_stack_value
:
12382 return "DW_OP_stack_value";
12383 /* GNU extensions. */
12384 case DW_OP_GNU_push_tls_address
:
12385 return "DW_OP_GNU_push_tls_address";
12386 case DW_OP_GNU_uninit
:
12387 return "DW_OP_GNU_uninit";
12389 return def
? "OP_<unknown>" : NULL
;
12394 dwarf_bool_name (unsigned mybool
)
12402 /* Convert a DWARF type code into its string name. */
12405 dwarf_type_encoding_name (unsigned enc
)
12410 return "DW_ATE_void";
12411 case DW_ATE_address
:
12412 return "DW_ATE_address";
12413 case DW_ATE_boolean
:
12414 return "DW_ATE_boolean";
12415 case DW_ATE_complex_float
:
12416 return "DW_ATE_complex_float";
12418 return "DW_ATE_float";
12419 case DW_ATE_signed
:
12420 return "DW_ATE_signed";
12421 case DW_ATE_signed_char
:
12422 return "DW_ATE_signed_char";
12423 case DW_ATE_unsigned
:
12424 return "DW_ATE_unsigned";
12425 case DW_ATE_unsigned_char
:
12426 return "DW_ATE_unsigned_char";
12428 case DW_ATE_imaginary_float
:
12429 return "DW_ATE_imaginary_float";
12430 case DW_ATE_packed_decimal
:
12431 return "DW_ATE_packed_decimal";
12432 case DW_ATE_numeric_string
:
12433 return "DW_ATE_numeric_string";
12434 case DW_ATE_edited
:
12435 return "DW_ATE_edited";
12436 case DW_ATE_signed_fixed
:
12437 return "DW_ATE_signed_fixed";
12438 case DW_ATE_unsigned_fixed
:
12439 return "DW_ATE_unsigned_fixed";
12440 case DW_ATE_decimal_float
:
12441 return "DW_ATE_decimal_float";
12444 return "DW_ATE_UTF";
12445 /* HP extensions. */
12446 case DW_ATE_HP_float80
:
12447 return "DW_ATE_HP_float80";
12448 case DW_ATE_HP_complex_float80
:
12449 return "DW_ATE_HP_complex_float80";
12450 case DW_ATE_HP_float128
:
12451 return "DW_ATE_HP_float128";
12452 case DW_ATE_HP_complex_float128
:
12453 return "DW_ATE_HP_complex_float128";
12454 case DW_ATE_HP_floathpintel
:
12455 return "DW_ATE_HP_floathpintel";
12456 case DW_ATE_HP_imaginary_float80
:
12457 return "DW_ATE_HP_imaginary_float80";
12458 case DW_ATE_HP_imaginary_float128
:
12459 return "DW_ATE_HP_imaginary_float128";
12461 return "DW_ATE_<unknown>";
12465 /* Convert a DWARF call frame info operation to its string name. */
12469 dwarf_cfi_name (unsigned cfi_opc
)
12473 case DW_CFA_advance_loc
:
12474 return "DW_CFA_advance_loc";
12475 case DW_CFA_offset
:
12476 return "DW_CFA_offset";
12477 case DW_CFA_restore
:
12478 return "DW_CFA_restore";
12480 return "DW_CFA_nop";
12481 case DW_CFA_set_loc
:
12482 return "DW_CFA_set_loc";
12483 case DW_CFA_advance_loc1
:
12484 return "DW_CFA_advance_loc1";
12485 case DW_CFA_advance_loc2
:
12486 return "DW_CFA_advance_loc2";
12487 case DW_CFA_advance_loc4
:
12488 return "DW_CFA_advance_loc4";
12489 case DW_CFA_offset_extended
:
12490 return "DW_CFA_offset_extended";
12491 case DW_CFA_restore_extended
:
12492 return "DW_CFA_restore_extended";
12493 case DW_CFA_undefined
:
12494 return "DW_CFA_undefined";
12495 case DW_CFA_same_value
:
12496 return "DW_CFA_same_value";
12497 case DW_CFA_register
:
12498 return "DW_CFA_register";
12499 case DW_CFA_remember_state
:
12500 return "DW_CFA_remember_state";
12501 case DW_CFA_restore_state
:
12502 return "DW_CFA_restore_state";
12503 case DW_CFA_def_cfa
:
12504 return "DW_CFA_def_cfa";
12505 case DW_CFA_def_cfa_register
:
12506 return "DW_CFA_def_cfa_register";
12507 case DW_CFA_def_cfa_offset
:
12508 return "DW_CFA_def_cfa_offset";
12510 case DW_CFA_def_cfa_expression
:
12511 return "DW_CFA_def_cfa_expression";
12512 case DW_CFA_expression
:
12513 return "DW_CFA_expression";
12514 case DW_CFA_offset_extended_sf
:
12515 return "DW_CFA_offset_extended_sf";
12516 case DW_CFA_def_cfa_sf
:
12517 return "DW_CFA_def_cfa_sf";
12518 case DW_CFA_def_cfa_offset_sf
:
12519 return "DW_CFA_def_cfa_offset_sf";
12520 case DW_CFA_val_offset
:
12521 return "DW_CFA_val_offset";
12522 case DW_CFA_val_offset_sf
:
12523 return "DW_CFA_val_offset_sf";
12524 case DW_CFA_val_expression
:
12525 return "DW_CFA_val_expression";
12526 /* SGI/MIPS specific. */
12527 case DW_CFA_MIPS_advance_loc8
:
12528 return "DW_CFA_MIPS_advance_loc8";
12529 /* GNU extensions. */
12530 case DW_CFA_GNU_window_save
:
12531 return "DW_CFA_GNU_window_save";
12532 case DW_CFA_GNU_args_size
:
12533 return "DW_CFA_GNU_args_size";
12534 case DW_CFA_GNU_negative_offset_extended
:
12535 return "DW_CFA_GNU_negative_offset_extended";
12537 return "DW_CFA_<unknown>";
12543 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12547 print_spaces (indent
, f
);
12548 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12549 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12551 if (die
->parent
!= NULL
)
12553 print_spaces (indent
, f
);
12554 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12555 die
->parent
->offset
);
12558 print_spaces (indent
, f
);
12559 fprintf_unfiltered (f
, " has children: %s\n",
12560 dwarf_bool_name (die
->child
!= NULL
));
12562 print_spaces (indent
, f
);
12563 fprintf_unfiltered (f
, " attributes:\n");
12565 for (i
= 0; i
< die
->num_attrs
; ++i
)
12567 print_spaces (indent
, f
);
12568 fprintf_unfiltered (f
, " %s (%s) ",
12569 dwarf_attr_name (die
->attrs
[i
].name
),
12570 dwarf_form_name (die
->attrs
[i
].form
));
12572 switch (die
->attrs
[i
].form
)
12574 case DW_FORM_ref_addr
:
12576 fprintf_unfiltered (f
, "address: ");
12577 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12579 case DW_FORM_block2
:
12580 case DW_FORM_block4
:
12581 case DW_FORM_block
:
12582 case DW_FORM_block1
:
12583 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12585 case DW_FORM_exprloc
:
12586 fprintf_unfiltered (f
, "expression: size %u",
12587 DW_BLOCK (&die
->attrs
[i
])->size
);
12592 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12593 (long) (DW_ADDR (&die
->attrs
[i
])));
12595 case DW_FORM_data1
:
12596 case DW_FORM_data2
:
12597 case DW_FORM_data4
:
12598 case DW_FORM_data8
:
12599 case DW_FORM_udata
:
12600 case DW_FORM_sdata
:
12601 fprintf_unfiltered (f
, "constant: %s",
12602 pulongest (DW_UNSND (&die
->attrs
[i
])));
12604 case DW_FORM_sec_offset
:
12605 fprintf_unfiltered (f
, "section offset: %s",
12606 pulongest (DW_UNSND (&die
->attrs
[i
])));
12609 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12610 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12611 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12613 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12615 case DW_FORM_string
:
12617 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12618 DW_STRING (&die
->attrs
[i
])
12619 ? DW_STRING (&die
->attrs
[i
]) : "",
12620 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12623 if (DW_UNSND (&die
->attrs
[i
]))
12624 fprintf_unfiltered (f
, "flag: TRUE");
12626 fprintf_unfiltered (f
, "flag: FALSE");
12628 case DW_FORM_flag_present
:
12629 fprintf_unfiltered (f
, "flag: TRUE");
12631 case DW_FORM_indirect
:
12632 /* the reader will have reduced the indirect form to
12633 the "base form" so this form should not occur */
12634 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12637 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12638 die
->attrs
[i
].form
);
12641 fprintf_unfiltered (f
, "\n");
12646 dump_die_for_error (struct die_info
*die
)
12648 dump_die_shallow (gdb_stderr
, 0, die
);
12652 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12654 int indent
= level
* 4;
12656 gdb_assert (die
!= NULL
);
12658 if (level
>= max_level
)
12661 dump_die_shallow (f
, indent
, die
);
12663 if (die
->child
!= NULL
)
12665 print_spaces (indent
, f
);
12666 fprintf_unfiltered (f
, " Children:");
12667 if (level
+ 1 < max_level
)
12669 fprintf_unfiltered (f
, "\n");
12670 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12674 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12678 if (die
->sibling
!= NULL
&& level
> 0)
12680 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12684 /* This is called from the pdie macro in gdbinit.in.
12685 It's not static so gcc will keep a copy callable from gdb. */
12688 dump_die (struct die_info
*die
, int max_level
)
12690 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12694 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12698 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12704 is_ref_attr (struct attribute
*attr
)
12706 switch (attr
->form
)
12708 case DW_FORM_ref_addr
:
12713 case DW_FORM_ref_udata
:
12720 static unsigned int
12721 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12723 if (is_ref_attr (attr
))
12724 return DW_ADDR (attr
);
12726 complaint (&symfile_complaints
,
12727 _("unsupported die ref attribute form: '%s'"),
12728 dwarf_form_name (attr
->form
));
12732 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12733 * the value held by the attribute is not constant. */
12736 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12738 if (attr
->form
== DW_FORM_sdata
)
12739 return DW_SND (attr
);
12740 else if (attr
->form
== DW_FORM_udata
12741 || attr
->form
== DW_FORM_data1
12742 || attr
->form
== DW_FORM_data2
12743 || attr
->form
== DW_FORM_data4
12744 || attr
->form
== DW_FORM_data8
)
12745 return DW_UNSND (attr
);
12748 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12749 dwarf_form_name (attr
->form
));
12750 return default_value
;
12754 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12755 unit and add it to our queue.
12756 The result is non-zero if PER_CU was queued, otherwise the result is zero
12757 meaning either PER_CU is already queued or it is already loaded. */
12760 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12761 struct dwarf2_per_cu_data
*per_cu
)
12763 /* We may arrive here during partial symbol reading, if we need full
12764 DIEs to process an unusual case (e.g. template arguments). Do
12765 not queue PER_CU, just tell our caller to load its DIEs. */
12766 if (dwarf2_per_objfile
->reading_partial_symbols
)
12768 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12773 /* Mark the dependence relation so that we don't flush PER_CU
12775 dwarf2_add_dependence (this_cu
, per_cu
);
12777 /* If it's already on the queue, we have nothing to do. */
12778 if (per_cu
->queued
)
12781 /* If the compilation unit is already loaded, just mark it as
12783 if (per_cu
->cu
!= NULL
)
12785 per_cu
->cu
->last_used
= 0;
12789 /* Add it to the queue. */
12790 queue_comp_unit (per_cu
, this_cu
->objfile
);
12795 /* Follow reference or signature attribute ATTR of SRC_DIE.
12796 On entry *REF_CU is the CU of SRC_DIE.
12797 On exit *REF_CU is the CU of the result. */
12799 static struct die_info
*
12800 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12801 struct dwarf2_cu
**ref_cu
)
12803 struct die_info
*die
;
12805 if (is_ref_attr (attr
))
12806 die
= follow_die_ref (src_die
, attr
, ref_cu
);
12807 else if (attr
->form
== DW_FORM_sig8
)
12808 die
= follow_die_sig (src_die
, attr
, ref_cu
);
12811 dump_die_for_error (src_die
);
12812 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12813 (*ref_cu
)->objfile
->name
);
12819 /* Follow reference OFFSET.
12820 On entry *REF_CU is the CU of the source die referencing OFFSET.
12821 On exit *REF_CU is the CU of the result.
12822 Returns NULL if OFFSET is invalid. */
12824 static struct die_info
*
12825 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
12827 struct die_info temp_die
;
12828 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
12830 gdb_assert (cu
->per_cu
!= NULL
);
12834 if (cu
->per_cu
->from_debug_types
)
12836 /* .debug_types CUs cannot reference anything outside their CU.
12837 If they need to, they have to reference a signatured type via
12839 if (! offset_in_cu_p (&cu
->header
, offset
))
12842 else if (! offset_in_cu_p (&cu
->header
, offset
))
12844 struct dwarf2_per_cu_data
*per_cu
;
12846 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
12848 /* If necessary, add it to the queue and load its DIEs. */
12849 if (maybe_queue_comp_unit (cu
, per_cu
))
12850 load_full_comp_unit (per_cu
, cu
->objfile
);
12852 target_cu
= per_cu
->cu
;
12854 else if (cu
->dies
== NULL
)
12856 /* We're loading full DIEs during partial symbol reading. */
12857 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
12858 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
12861 *ref_cu
= target_cu
;
12862 temp_die
.offset
= offset
;
12863 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
12866 /* Follow reference attribute ATTR of SRC_DIE.
12867 On entry *REF_CU is the CU of SRC_DIE.
12868 On exit *REF_CU is the CU of the result. */
12870 static struct die_info
*
12871 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
12872 struct dwarf2_cu
**ref_cu
)
12874 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12875 struct dwarf2_cu
*cu
= *ref_cu
;
12876 struct die_info
*die
;
12878 die
= follow_die_offset (offset
, ref_cu
);
12880 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12881 "at 0x%x [in module %s]"),
12882 offset
, src_die
->offset
, cu
->objfile
->name
);
12887 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12888 value is intended for DW_OP_call*. */
12890 struct dwarf2_locexpr_baton
12891 dwarf2_fetch_die_location_block (unsigned int offset
,
12892 struct dwarf2_per_cu_data
*per_cu
)
12894 struct dwarf2_cu
*cu
= per_cu
->cu
;
12895 struct die_info
*die
;
12896 struct attribute
*attr
;
12897 struct dwarf2_locexpr_baton retval
;
12899 die
= follow_die_offset (offset
, &cu
);
12901 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12902 offset
, per_cu
->cu
->objfile
->name
);
12904 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12907 /* DWARF: "If there is no such attribute, then there is no effect.". */
12909 retval
.data
= NULL
;
12914 if (!attr_form_is_block (attr
))
12915 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12916 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12917 offset
, per_cu
->cu
->objfile
->name
);
12919 retval
.data
= DW_BLOCK (attr
)->data
;
12920 retval
.size
= DW_BLOCK (attr
)->size
;
12922 retval
.per_cu
= cu
->per_cu
;
12926 /* Follow the signature attribute ATTR in SRC_DIE.
12927 On entry *REF_CU is the CU of SRC_DIE.
12928 On exit *REF_CU is the CU of the result. */
12930 static struct die_info
*
12931 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
12932 struct dwarf2_cu
**ref_cu
)
12934 struct objfile
*objfile
= (*ref_cu
)->objfile
;
12935 struct die_info temp_die
;
12936 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12937 struct dwarf2_cu
*sig_cu
;
12938 struct die_info
*die
;
12940 /* sig_type will be NULL if the signatured type is missing from
12942 if (sig_type
== NULL
)
12943 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12944 "at 0x%x [in module %s]"),
12945 src_die
->offset
, objfile
->name
);
12947 /* If necessary, add it to the queue and load its DIEs. */
12949 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
12950 read_signatured_type (objfile
, sig_type
);
12952 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
12954 sig_cu
= sig_type
->per_cu
.cu
;
12955 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
12956 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
12963 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12964 "at 0x%x [in module %s]"),
12965 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
12968 /* Given an offset of a signatured type, return its signatured_type. */
12970 static struct signatured_type
*
12971 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
12973 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
12974 unsigned int length
, initial_length_size
;
12975 unsigned int sig_offset
;
12976 struct signatured_type find_entry
, *type_sig
;
12978 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
12979 sig_offset
= (initial_length_size
12981 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
12982 + 1 /*address_size*/);
12983 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
12984 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
12986 /* This is only used to lookup previously recorded types.
12987 If we didn't find it, it's our bug. */
12988 gdb_assert (type_sig
!= NULL
);
12989 gdb_assert (offset
== type_sig
->offset
);
12994 /* Read in signatured type at OFFSET and build its CU and die(s). */
12997 read_signatured_type_at_offset (struct objfile
*objfile
,
12998 unsigned int offset
)
13000 struct signatured_type
*type_sig
;
13002 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13004 /* We have the section offset, but we need the signature to do the
13005 hash table lookup. */
13006 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13008 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13010 read_signatured_type (objfile
, type_sig
);
13012 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13015 /* Read in a signatured type and build its CU and DIEs. */
13018 read_signatured_type (struct objfile
*objfile
,
13019 struct signatured_type
*type_sig
)
13021 gdb_byte
*types_ptr
;
13022 struct die_reader_specs reader_specs
;
13023 struct dwarf2_cu
*cu
;
13024 ULONGEST signature
;
13025 struct cleanup
*back_to
, *free_cu_cleanup
;
13026 struct attribute
*attr
;
13028 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13029 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13031 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13033 cu
= xmalloc (sizeof (struct dwarf2_cu
));
13034 memset (cu
, 0, sizeof (struct dwarf2_cu
));
13035 obstack_init (&cu
->comp_unit_obstack
);
13036 cu
->objfile
= objfile
;
13037 type_sig
->per_cu
.cu
= cu
;
13038 cu
->per_cu
= &type_sig
->per_cu
;
13040 /* If an error occurs while loading, release our storage. */
13041 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13043 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13044 types_ptr
, objfile
->obfd
);
13045 gdb_assert (signature
== type_sig
->signature
);
13048 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13052 &cu
->comp_unit_obstack
,
13053 hashtab_obstack_allocate
,
13054 dummy_obstack_deallocate
);
13056 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13057 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13059 init_cu_die_reader (&reader_specs
, cu
);
13061 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13064 /* We try not to read any attributes in this function, because not
13065 all objfiles needed for references have been loaded yet, and symbol
13066 table processing isn't initialized. But we have to set the CU language,
13067 or we won't be able to build types correctly. */
13068 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
13070 set_cu_language (DW_UNSND (attr
), cu
);
13072 set_cu_language (language_minimal
, cu
);
13074 do_cleanups (back_to
);
13076 /* We've successfully allocated this compilation unit. Let our caller
13077 clean it up when finished with it. */
13078 discard_cleanups (free_cu_cleanup
);
13080 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13081 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13084 /* Decode simple location descriptions.
13085 Given a pointer to a dwarf block that defines a location, compute
13086 the location and return the value.
13088 NOTE drow/2003-11-18: This function is called in two situations
13089 now: for the address of static or global variables (partial symbols
13090 only) and for offsets into structures which are expected to be
13091 (more or less) constant. The partial symbol case should go away,
13092 and only the constant case should remain. That will let this
13093 function complain more accurately. A few special modes are allowed
13094 without complaint for global variables (for instance, global
13095 register values and thread-local values).
13097 A location description containing no operations indicates that the
13098 object is optimized out. The return value is 0 for that case.
13099 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13100 callers will only want a very basic result and this can become a
13103 Note that stack[0] is unused except as a default error return.
13104 Note that stack overflow is not yet handled. */
13107 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13109 struct objfile
*objfile
= cu
->objfile
;
13111 int size
= blk
->size
;
13112 gdb_byte
*data
= blk
->data
;
13113 CORE_ADDR stack
[64];
13115 unsigned int bytes_read
, unsnd
;
13159 stack
[++stacki
] = op
- DW_OP_lit0
;
13194 stack
[++stacki
] = op
- DW_OP_reg0
;
13196 dwarf2_complex_location_expr_complaint ();
13200 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13202 stack
[++stacki
] = unsnd
;
13204 dwarf2_complex_location_expr_complaint ();
13208 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13213 case DW_OP_const1u
:
13214 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13218 case DW_OP_const1s
:
13219 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13223 case DW_OP_const2u
:
13224 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13228 case DW_OP_const2s
:
13229 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13233 case DW_OP_const4u
:
13234 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13238 case DW_OP_const4s
:
13239 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13244 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13250 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13255 stack
[stacki
+ 1] = stack
[stacki
];
13260 stack
[stacki
- 1] += stack
[stacki
];
13264 case DW_OP_plus_uconst
:
13265 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13270 stack
[stacki
- 1] -= stack
[stacki
];
13275 /* If we're not the last op, then we definitely can't encode
13276 this using GDB's address_class enum. This is valid for partial
13277 global symbols, although the variable's address will be bogus
13280 dwarf2_complex_location_expr_complaint ();
13283 case DW_OP_GNU_push_tls_address
:
13284 /* The top of the stack has the offset from the beginning
13285 of the thread control block at which the variable is located. */
13286 /* Nothing should follow this operator, so the top of stack would
13288 /* This is valid for partial global symbols, but the variable's
13289 address will be bogus in the psymtab. */
13291 dwarf2_complex_location_expr_complaint ();
13294 case DW_OP_GNU_uninit
:
13298 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13299 dwarf_stack_op_name (op
, 1));
13300 return (stack
[stacki
]);
13303 return (stack
[stacki
]);
13306 /* memory allocation interface */
13308 static struct dwarf_block
*
13309 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13311 struct dwarf_block
*blk
;
13313 blk
= (struct dwarf_block
*)
13314 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13318 static struct abbrev_info
*
13319 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13321 struct abbrev_info
*abbrev
;
13323 abbrev
= (struct abbrev_info
*)
13324 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13325 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13329 static struct die_info
*
13330 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13332 struct die_info
*die
;
13333 size_t size
= sizeof (struct die_info
);
13336 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13338 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13339 memset (die
, 0, sizeof (struct die_info
));
13344 /* Macro support. */
13347 /* Return the full name of file number I in *LH's file name table.
13348 Use COMP_DIR as the name of the current directory of the
13349 compilation. The result is allocated using xmalloc; the caller is
13350 responsible for freeing it. */
13352 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13354 /* Is the file number a valid index into the line header's file name
13355 table? Remember that file numbers start with one, not zero. */
13356 if (1 <= file
&& file
<= lh
->num_file_names
)
13358 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13360 if (IS_ABSOLUTE_PATH (fe
->name
))
13361 return xstrdup (fe
->name
);
13369 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13375 dir_len
= strlen (dir
);
13376 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13377 strcpy (full_name
, dir
);
13378 full_name
[dir_len
] = '/';
13379 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13383 return xstrdup (fe
->name
);
13388 /* The compiler produced a bogus file number. We can at least
13389 record the macro definitions made in the file, even if we
13390 won't be able to find the file by name. */
13391 char fake_name
[80];
13393 sprintf (fake_name
, "<bad macro file number %d>", file
);
13395 complaint (&symfile_complaints
,
13396 _("bad file number in macro information (%d)"),
13399 return xstrdup (fake_name
);
13404 static struct macro_source_file
*
13405 macro_start_file (int file
, int line
,
13406 struct macro_source_file
*current_file
,
13407 const char *comp_dir
,
13408 struct line_header
*lh
, struct objfile
*objfile
)
13410 /* The full name of this source file. */
13411 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13413 /* We don't create a macro table for this compilation unit
13414 at all until we actually get a filename. */
13415 if (! pending_macros
)
13416 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13417 objfile
->macro_cache
);
13419 if (! current_file
)
13420 /* If we have no current file, then this must be the start_file
13421 directive for the compilation unit's main source file. */
13422 current_file
= macro_set_main (pending_macros
, full_name
);
13424 current_file
= macro_include (current_file
, line
, full_name
);
13428 return current_file
;
13432 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13433 followed by a null byte. */
13435 copy_string (const char *buf
, int len
)
13437 char *s
= xmalloc (len
+ 1);
13439 memcpy (s
, buf
, len
);
13445 static const char *
13446 consume_improper_spaces (const char *p
, const char *body
)
13450 complaint (&symfile_complaints
,
13451 _("macro definition contains spaces in formal argument list:\n`%s'"),
13463 parse_macro_definition (struct macro_source_file
*file
, int line
,
13468 /* The body string takes one of two forms. For object-like macro
13469 definitions, it should be:
13471 <macro name> " " <definition>
13473 For function-like macro definitions, it should be:
13475 <macro name> "() " <definition>
13477 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13479 Spaces may appear only where explicitly indicated, and in the
13482 The Dwarf 2 spec says that an object-like macro's name is always
13483 followed by a space, but versions of GCC around March 2002 omit
13484 the space when the macro's definition is the empty string.
13486 The Dwarf 2 spec says that there should be no spaces between the
13487 formal arguments in a function-like macro's formal argument list,
13488 but versions of GCC around March 2002 include spaces after the
13492 /* Find the extent of the macro name. The macro name is terminated
13493 by either a space or null character (for an object-like macro) or
13494 an opening paren (for a function-like macro). */
13495 for (p
= body
; *p
; p
++)
13496 if (*p
== ' ' || *p
== '(')
13499 if (*p
== ' ' || *p
== '\0')
13501 /* It's an object-like macro. */
13502 int name_len
= p
- body
;
13503 char *name
= copy_string (body
, name_len
);
13504 const char *replacement
;
13507 replacement
= body
+ name_len
+ 1;
13510 dwarf2_macro_malformed_definition_complaint (body
);
13511 replacement
= body
+ name_len
;
13514 macro_define_object (file
, line
, name
, replacement
);
13518 else if (*p
== '(')
13520 /* It's a function-like macro. */
13521 char *name
= copy_string (body
, p
- body
);
13524 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13528 p
= consume_improper_spaces (p
, body
);
13530 /* Parse the formal argument list. */
13531 while (*p
&& *p
!= ')')
13533 /* Find the extent of the current argument name. */
13534 const char *arg_start
= p
;
13536 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13539 if (! *p
|| p
== arg_start
)
13540 dwarf2_macro_malformed_definition_complaint (body
);
13543 /* Make sure argv has room for the new argument. */
13544 if (argc
>= argv_size
)
13547 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13550 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13553 p
= consume_improper_spaces (p
, body
);
13555 /* Consume the comma, if present. */
13560 p
= consume_improper_spaces (p
, body
);
13569 /* Perfectly formed definition, no complaints. */
13570 macro_define_function (file
, line
, name
,
13571 argc
, (const char **) argv
,
13573 else if (*p
== '\0')
13575 /* Complain, but do define it. */
13576 dwarf2_macro_malformed_definition_complaint (body
);
13577 macro_define_function (file
, line
, name
,
13578 argc
, (const char **) argv
,
13582 /* Just complain. */
13583 dwarf2_macro_malformed_definition_complaint (body
);
13586 /* Just complain. */
13587 dwarf2_macro_malformed_definition_complaint (body
);
13593 for (i
= 0; i
< argc
; i
++)
13599 dwarf2_macro_malformed_definition_complaint (body
);
13604 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13605 char *comp_dir
, bfd
*abfd
,
13606 struct dwarf2_cu
*cu
)
13608 gdb_byte
*mac_ptr
, *mac_end
;
13609 struct macro_source_file
*current_file
= 0;
13610 enum dwarf_macinfo_record_type macinfo_type
;
13611 int at_commandline
;
13613 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13614 &dwarf2_per_objfile
->macinfo
);
13615 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13617 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13621 /* First pass: Find the name of the base filename.
13622 This filename is needed in order to process all macros whose definition
13623 (or undefinition) comes from the command line. These macros are defined
13624 before the first DW_MACINFO_start_file entry, and yet still need to be
13625 associated to the base file.
13627 To determine the base file name, we scan the macro definitions until we
13628 reach the first DW_MACINFO_start_file entry. We then initialize
13629 CURRENT_FILE accordingly so that any macro definition found before the
13630 first DW_MACINFO_start_file can still be associated to the base file. */
13632 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13633 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13634 + dwarf2_per_objfile
->macinfo
.size
;
13638 /* Do we at least have room for a macinfo type byte? */
13639 if (mac_ptr
>= mac_end
)
13641 /* Complaint is printed during the second pass as GDB will probably
13642 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13646 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13649 switch (macinfo_type
)
13651 /* A zero macinfo type indicates the end of the macro
13656 case DW_MACINFO_define
:
13657 case DW_MACINFO_undef
:
13658 /* Only skip the data by MAC_PTR. */
13660 unsigned int bytes_read
;
13662 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13663 mac_ptr
+= bytes_read
;
13664 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13665 mac_ptr
+= bytes_read
;
13669 case DW_MACINFO_start_file
:
13671 unsigned int bytes_read
;
13674 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13675 mac_ptr
+= bytes_read
;
13676 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13677 mac_ptr
+= bytes_read
;
13679 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13684 case DW_MACINFO_end_file
:
13685 /* No data to skip by MAC_PTR. */
13688 case DW_MACINFO_vendor_ext
:
13689 /* Only skip the data by MAC_PTR. */
13691 unsigned int bytes_read
;
13693 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13694 mac_ptr
+= bytes_read
;
13695 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13696 mac_ptr
+= bytes_read
;
13703 } while (macinfo_type
!= 0 && current_file
== NULL
);
13705 /* Second pass: Process all entries.
13707 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13708 command-line macro definitions/undefinitions. This flag is unset when we
13709 reach the first DW_MACINFO_start_file entry. */
13711 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13713 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13714 GDB is still reading the definitions from command line. First
13715 DW_MACINFO_start_file will need to be ignored as it was already executed
13716 to create CURRENT_FILE for the main source holding also the command line
13717 definitions. On first met DW_MACINFO_start_file this flag is reset to
13718 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13720 at_commandline
= 1;
13724 /* Do we at least have room for a macinfo type byte? */
13725 if (mac_ptr
>= mac_end
)
13727 dwarf2_macros_too_long_complaint ();
13731 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13734 switch (macinfo_type
)
13736 /* A zero macinfo type indicates the end of the macro
13741 case DW_MACINFO_define
:
13742 case DW_MACINFO_undef
:
13744 unsigned int bytes_read
;
13748 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13749 mac_ptr
+= bytes_read
;
13750 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13751 mac_ptr
+= bytes_read
;
13753 if (! current_file
)
13755 /* DWARF violation as no main source is present. */
13756 complaint (&symfile_complaints
,
13757 _("debug info with no main source gives macro %s "
13759 macinfo_type
== DW_MACINFO_define
?
13761 macinfo_type
== DW_MACINFO_undef
?
13762 _("undefinition") :
13763 _("something-or-other"), line
, body
);
13766 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13767 complaint (&symfile_complaints
,
13768 _("debug info gives %s macro %s with %s line %d: %s"),
13769 at_commandline
? _("command-line") : _("in-file"),
13770 macinfo_type
== DW_MACINFO_define
?
13772 macinfo_type
== DW_MACINFO_undef
?
13773 _("undefinition") :
13774 _("something-or-other"),
13775 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13777 if (macinfo_type
== DW_MACINFO_define
)
13778 parse_macro_definition (current_file
, line
, body
);
13779 else if (macinfo_type
== DW_MACINFO_undef
)
13780 macro_undef (current_file
, line
, body
);
13784 case DW_MACINFO_start_file
:
13786 unsigned int bytes_read
;
13789 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13790 mac_ptr
+= bytes_read
;
13791 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13792 mac_ptr
+= bytes_read
;
13794 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13795 complaint (&symfile_complaints
,
13796 _("debug info gives source %d included "
13797 "from %s at %s line %d"),
13798 file
, at_commandline
? _("command-line") : _("file"),
13799 line
== 0 ? _("zero") : _("non-zero"), line
);
13801 if (at_commandline
)
13803 /* This DW_MACINFO_start_file was executed in the pass one. */
13804 at_commandline
= 0;
13807 current_file
= macro_start_file (file
, line
,
13808 current_file
, comp_dir
,
13813 case DW_MACINFO_end_file
:
13814 if (! current_file
)
13815 complaint (&symfile_complaints
,
13816 _("macro debug info has an unmatched `close_file' directive"));
13819 current_file
= current_file
->included_by
;
13820 if (! current_file
)
13822 enum dwarf_macinfo_record_type next_type
;
13824 /* GCC circa March 2002 doesn't produce the zero
13825 type byte marking the end of the compilation
13826 unit. Complain if it's not there, but exit no
13829 /* Do we at least have room for a macinfo type byte? */
13830 if (mac_ptr
>= mac_end
)
13832 dwarf2_macros_too_long_complaint ();
13836 /* We don't increment mac_ptr here, so this is just
13838 next_type
= read_1_byte (abfd
, mac_ptr
);
13839 if (next_type
!= 0)
13840 complaint (&symfile_complaints
,
13841 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13848 case DW_MACINFO_vendor_ext
:
13850 unsigned int bytes_read
;
13854 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13855 mac_ptr
+= bytes_read
;
13856 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13857 mac_ptr
+= bytes_read
;
13859 /* We don't recognize any vendor extensions. */
13863 } while (macinfo_type
!= 0);
13866 /* Check if the attribute's form is a DW_FORM_block*
13867 if so return true else false. */
13869 attr_form_is_block (struct attribute
*attr
)
13871 return (attr
== NULL
? 0 :
13872 attr
->form
== DW_FORM_block1
13873 || attr
->form
== DW_FORM_block2
13874 || attr
->form
== DW_FORM_block4
13875 || attr
->form
== DW_FORM_block
13876 || attr
->form
== DW_FORM_exprloc
);
13879 /* Return non-zero if ATTR's value is a section offset --- classes
13880 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13881 You may use DW_UNSND (attr) to retrieve such offsets.
13883 Section 7.5.4, "Attribute Encodings", explains that no attribute
13884 may have a value that belongs to more than one of these classes; it
13885 would be ambiguous if we did, because we use the same forms for all
13888 attr_form_is_section_offset (struct attribute
*attr
)
13890 return (attr
->form
== DW_FORM_data4
13891 || attr
->form
== DW_FORM_data8
13892 || attr
->form
== DW_FORM_sec_offset
);
13896 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13897 zero otherwise. When this function returns true, you can apply
13898 dwarf2_get_attr_constant_value to it.
13900 However, note that for some attributes you must check
13901 attr_form_is_section_offset before using this test. DW_FORM_data4
13902 and DW_FORM_data8 are members of both the constant class, and of
13903 the classes that contain offsets into other debug sections
13904 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13905 that, if an attribute's can be either a constant or one of the
13906 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13907 taken as section offsets, not constants. */
13909 attr_form_is_constant (struct attribute
*attr
)
13911 switch (attr
->form
)
13913 case DW_FORM_sdata
:
13914 case DW_FORM_udata
:
13915 case DW_FORM_data1
:
13916 case DW_FORM_data2
:
13917 case DW_FORM_data4
:
13918 case DW_FORM_data8
:
13926 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
13927 struct dwarf2_cu
*cu
)
13929 if (attr_form_is_section_offset (attr
)
13930 /* ".debug_loc" may not exist at all, or the offset may be outside
13931 the section. If so, fall through to the complaint in the
13933 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
13935 struct dwarf2_loclist_baton
*baton
;
13937 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13938 sizeof (struct dwarf2_loclist_baton
));
13939 baton
->per_cu
= cu
->per_cu
;
13940 gdb_assert (baton
->per_cu
);
13942 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13943 &dwarf2_per_objfile
->loc
);
13945 /* We don't know how long the location list is, but make sure we
13946 don't run off the edge of the section. */
13947 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
13948 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
13949 baton
->base_address
= cu
->base_address
;
13950 if (cu
->base_known
== 0)
13951 complaint (&symfile_complaints
,
13952 _("Location list used without specifying the CU base address."));
13954 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
13955 SYMBOL_LOCATION_BATON (sym
) = baton
;
13959 struct dwarf2_locexpr_baton
*baton
;
13961 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13962 sizeof (struct dwarf2_locexpr_baton
));
13963 baton
->per_cu
= cu
->per_cu
;
13964 gdb_assert (baton
->per_cu
);
13966 if (attr_form_is_block (attr
))
13968 /* Note that we're just copying the block's data pointer
13969 here, not the actual data. We're still pointing into the
13970 info_buffer for SYM's objfile; right now we never release
13971 that buffer, but when we do clean up properly this may
13973 baton
->size
= DW_BLOCK (attr
)->size
;
13974 baton
->data
= DW_BLOCK (attr
)->data
;
13978 dwarf2_invalid_attrib_class_complaint ("location description",
13979 SYMBOL_NATURAL_NAME (sym
));
13981 baton
->data
= NULL
;
13984 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13985 SYMBOL_LOCATION_BATON (sym
) = baton
;
13989 /* Return the OBJFILE associated with the compilation unit CU. If CU
13990 came from a separate debuginfo file, then the master objfile is
13994 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
13996 struct objfile
*objfile
= per_cu
->objfile
;
13998 /* Return the master objfile, so that we can report and look up the
13999 correct file containing this variable. */
14000 if (objfile
->separate_debug_objfile_backlink
)
14001 objfile
= objfile
->separate_debug_objfile_backlink
;
14006 /* Return the address size given in the compilation unit header for CU. */
14009 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14012 return per_cu
->cu
->header
.addr_size
;
14015 /* If the CU is not currently read in, we re-read its header. */
14016 struct objfile
*objfile
= per_cu
->objfile
;
14017 struct dwarf2_per_objfile
*per_objfile
14018 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14019 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14020 struct comp_unit_head cu_header
;
14022 memset (&cu_header
, 0, sizeof cu_header
);
14023 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14024 return cu_header
.addr_size
;
14028 /* Return the offset size given in the compilation unit header for CU. */
14031 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14034 return per_cu
->cu
->header
.offset_size
;
14037 /* If the CU is not currently read in, we re-read its header. */
14038 struct objfile
*objfile
= per_cu
->objfile
;
14039 struct dwarf2_per_objfile
*per_objfile
14040 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14041 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14042 struct comp_unit_head cu_header
;
14044 memset (&cu_header
, 0, sizeof cu_header
);
14045 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14046 return cu_header
.offset_size
;
14050 /* Return the text offset of the CU. The returned offset comes from
14051 this CU's objfile. If this objfile came from a separate debuginfo
14052 file, then the offset may be different from the corresponding
14053 offset in the parent objfile. */
14056 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14058 struct objfile
*objfile
= per_cu
->objfile
;
14060 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14063 /* Locate the .debug_info compilation unit from CU's objfile which contains
14064 the DIE at OFFSET. Raises an error on failure. */
14066 static struct dwarf2_per_cu_data
*
14067 dwarf2_find_containing_comp_unit (unsigned int offset
,
14068 struct objfile
*objfile
)
14070 struct dwarf2_per_cu_data
*this_cu
;
14074 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14077 int mid
= low
+ (high
- low
) / 2;
14079 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14084 gdb_assert (low
== high
);
14085 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14088 error (_("Dwarf Error: could not find partial DIE containing "
14089 "offset 0x%lx [in module %s]"),
14090 (long) offset
, bfd_get_filename (objfile
->obfd
));
14092 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14093 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14097 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14098 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14099 && offset
>= this_cu
->offset
+ this_cu
->length
)
14100 error (_("invalid dwarf2 offset %u"), offset
);
14101 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14106 /* Locate the compilation unit from OBJFILE which is located at exactly
14107 OFFSET. Raises an error on failure. */
14109 static struct dwarf2_per_cu_data
*
14110 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14112 struct dwarf2_per_cu_data
*this_cu
;
14114 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14115 if (this_cu
->offset
!= offset
)
14116 error (_("no compilation unit with offset %u."), offset
);
14120 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14122 static struct dwarf2_cu
*
14123 alloc_one_comp_unit (struct objfile
*objfile
)
14125 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
14126 cu
->objfile
= objfile
;
14127 obstack_init (&cu
->comp_unit_obstack
);
14131 /* Release one cached compilation unit, CU. We unlink it from the tree
14132 of compilation units, but we don't remove it from the read_in_chain;
14133 the caller is responsible for that.
14134 NOTE: DATA is a void * because this function is also used as a
14135 cleanup routine. */
14138 free_one_comp_unit (void *data
)
14140 struct dwarf2_cu
*cu
= data
;
14142 if (cu
->per_cu
!= NULL
)
14143 cu
->per_cu
->cu
= NULL
;
14146 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14151 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14152 when we're finished with it. We can't free the pointer itself, but be
14153 sure to unlink it from the cache. Also release any associated storage
14154 and perform cache maintenance.
14156 Only used during partial symbol parsing. */
14159 free_stack_comp_unit (void *data
)
14161 struct dwarf2_cu
*cu
= data
;
14163 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14164 cu
->partial_dies
= NULL
;
14166 if (cu
->per_cu
!= NULL
)
14168 /* This compilation unit is on the stack in our caller, so we
14169 should not xfree it. Just unlink it. */
14170 cu
->per_cu
->cu
= NULL
;
14173 /* If we had a per-cu pointer, then we may have other compilation
14174 units loaded, so age them now. */
14175 age_cached_comp_units ();
14179 /* Free all cached compilation units. */
14182 free_cached_comp_units (void *data
)
14184 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14186 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14187 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14188 while (per_cu
!= NULL
)
14190 struct dwarf2_per_cu_data
*next_cu
;
14192 next_cu
= per_cu
->cu
->read_in_chain
;
14194 free_one_comp_unit (per_cu
->cu
);
14195 *last_chain
= next_cu
;
14201 /* Increase the age counter on each cached compilation unit, and free
14202 any that are too old. */
14205 age_cached_comp_units (void)
14207 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14209 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14210 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14211 while (per_cu
!= NULL
)
14213 per_cu
->cu
->last_used
++;
14214 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14215 dwarf2_mark (per_cu
->cu
);
14216 per_cu
= per_cu
->cu
->read_in_chain
;
14219 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14220 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14221 while (per_cu
!= NULL
)
14223 struct dwarf2_per_cu_data
*next_cu
;
14225 next_cu
= per_cu
->cu
->read_in_chain
;
14227 if (!per_cu
->cu
->mark
)
14229 free_one_comp_unit (per_cu
->cu
);
14230 *last_chain
= next_cu
;
14233 last_chain
= &per_cu
->cu
->read_in_chain
;
14239 /* Remove a single compilation unit from the cache. */
14242 free_one_cached_comp_unit (void *target_cu
)
14244 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14246 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14247 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14248 while (per_cu
!= NULL
)
14250 struct dwarf2_per_cu_data
*next_cu
;
14252 next_cu
= per_cu
->cu
->read_in_chain
;
14254 if (per_cu
->cu
== target_cu
)
14256 free_one_comp_unit (per_cu
->cu
);
14257 *last_chain
= next_cu
;
14261 last_chain
= &per_cu
->cu
->read_in_chain
;
14267 /* Release all extra memory associated with OBJFILE. */
14270 dwarf2_free_objfile (struct objfile
*objfile
)
14272 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14274 if (dwarf2_per_objfile
== NULL
)
14277 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14278 free_cached_comp_units (NULL
);
14280 if (dwarf2_per_objfile
->using_index
)
14284 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14287 struct dwarf2_per_cu_data
*per_cu
=
14288 dwarf2_per_objfile
->all_comp_units
[i
];
14290 if (!per_cu
->v
.quick
->lines
)
14293 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14295 if (per_cu
->v
.quick
->file_names
)
14296 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14297 if (per_cu
->v
.quick
->full_names
)
14298 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14301 free_line_header (per_cu
->v
.quick
->lines
);
14305 /* Everything else should be on the objfile obstack. */
14308 /* A pair of DIE offset and GDB type pointer. We store these
14309 in a hash table separate from the DIEs, and preserve them
14310 when the DIEs are flushed out of cache. */
14312 struct dwarf2_offset_and_type
14314 unsigned int offset
;
14318 /* Hash function for a dwarf2_offset_and_type. */
14321 offset_and_type_hash (const void *item
)
14323 const struct dwarf2_offset_and_type
*ofs
= item
;
14325 return ofs
->offset
;
14328 /* Equality function for a dwarf2_offset_and_type. */
14331 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14333 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14334 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14336 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14339 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14340 table if necessary. For convenience, return TYPE.
14342 The DIEs reading must have careful ordering to:
14343 * Not cause infite loops trying to read in DIEs as a prerequisite for
14344 reading current DIE.
14345 * Not trying to dereference contents of still incompletely read in types
14346 while reading in other DIEs.
14347 * Enable referencing still incompletely read in types just by a pointer to
14348 the type without accessing its fields.
14350 Therefore caller should follow these rules:
14351 * Try to fetch any prerequisite types we may need to build this DIE type
14352 before building the type and calling set_die_type.
14353 * After building type call set_die_type for current DIE as soon as
14354 possible before fetching more types to complete the current type.
14355 * Make the type as complete as possible before fetching more types. */
14357 static struct type
*
14358 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14360 struct dwarf2_offset_and_type
**slot
, ofs
;
14361 struct objfile
*objfile
= cu
->objfile
;
14362 htab_t
*type_hash_ptr
;
14364 /* For Ada types, make sure that the gnat-specific data is always
14365 initialized (if not already set). There are a few types where
14366 we should not be doing so, because the type-specific area is
14367 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14368 where the type-specific area is used to store the floatformat).
14369 But this is not a problem, because the gnat-specific information
14370 is actually not needed for these types. */
14371 if (need_gnat_info (cu
)
14372 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14373 && TYPE_CODE (type
) != TYPE_CODE_FLT
14374 && !HAVE_GNAT_AUX_INFO (type
))
14375 INIT_GNAT_SPECIFIC (type
);
14377 if (cu
->per_cu
->from_debug_types
)
14378 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14380 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14382 if (*type_hash_ptr
== NULL
)
14385 = htab_create_alloc_ex (127,
14386 offset_and_type_hash
,
14387 offset_and_type_eq
,
14389 &objfile
->objfile_obstack
,
14390 hashtab_obstack_allocate
,
14391 dummy_obstack_deallocate
);
14394 ofs
.offset
= die
->offset
;
14396 slot
= (struct dwarf2_offset_and_type
**)
14397 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14399 complaint (&symfile_complaints
,
14400 _("A problem internal to GDB: DIE 0x%x has type already set"),
14402 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14407 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14408 table, or return NULL if the die does not have a saved type. */
14410 static struct type
*
14411 get_die_type_at_offset (unsigned int offset
,
14412 struct dwarf2_per_cu_data
*per_cu
)
14414 struct dwarf2_offset_and_type
*slot
, ofs
;
14417 if (per_cu
->from_debug_types
)
14418 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14420 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14421 if (type_hash
== NULL
)
14424 ofs
.offset
= offset
;
14425 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14432 /* Look up the type for DIE in the appropriate type_hash table,
14433 or return NULL if DIE does not have a saved type. */
14435 static struct type
*
14436 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14438 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14441 /* Add a dependence relationship from CU to REF_PER_CU. */
14444 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14445 struct dwarf2_per_cu_data
*ref_per_cu
)
14449 if (cu
->dependencies
== NULL
)
14451 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14452 NULL
, &cu
->comp_unit_obstack
,
14453 hashtab_obstack_allocate
,
14454 dummy_obstack_deallocate
);
14456 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14458 *slot
= ref_per_cu
;
14461 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14462 Set the mark field in every compilation unit in the
14463 cache that we must keep because we are keeping CU. */
14466 dwarf2_mark_helper (void **slot
, void *data
)
14468 struct dwarf2_per_cu_data
*per_cu
;
14470 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14471 if (per_cu
->cu
->mark
)
14473 per_cu
->cu
->mark
= 1;
14475 if (per_cu
->cu
->dependencies
!= NULL
)
14476 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14481 /* Set the mark field in CU and in every other compilation unit in the
14482 cache that we must keep because we are keeping CU. */
14485 dwarf2_mark (struct dwarf2_cu
*cu
)
14490 if (cu
->dependencies
!= NULL
)
14491 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14495 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14499 per_cu
->cu
->mark
= 0;
14500 per_cu
= per_cu
->cu
->read_in_chain
;
14504 /* Trivial hash function for partial_die_info: the hash value of a DIE
14505 is its offset in .debug_info for this objfile. */
14508 partial_die_hash (const void *item
)
14510 const struct partial_die_info
*part_die
= item
;
14512 return part_die
->offset
;
14515 /* Trivial comparison function for partial_die_info structures: two DIEs
14516 are equal if they have the same offset. */
14519 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14521 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14522 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14524 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14527 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14528 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14531 set_dwarf2_cmd (char *args
, int from_tty
)
14533 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14537 show_dwarf2_cmd (char *args
, int from_tty
)
14539 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14542 /* If section described by INFO was mmapped, munmap it now. */
14545 munmap_section_buffer (struct dwarf2_section_info
*info
)
14547 if (info
->was_mmapped
)
14550 intptr_t begin
= (intptr_t) info
->buffer
;
14551 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14552 size_t map_length
= info
->size
+ begin
- map_begin
;
14554 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14556 /* Without HAVE_MMAP, we should never be here to begin with. */
14557 gdb_assert_not_reached ("no mmap support");
14562 /* munmap debug sections for OBJFILE, if necessary. */
14565 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14567 struct dwarf2_per_objfile
*data
= d
;
14569 /* This is sorted according to the order they're defined in to make it easier
14570 to keep in sync. */
14571 munmap_section_buffer (&data
->info
);
14572 munmap_section_buffer (&data
->abbrev
);
14573 munmap_section_buffer (&data
->line
);
14574 munmap_section_buffer (&data
->loc
);
14575 munmap_section_buffer (&data
->macinfo
);
14576 munmap_section_buffer (&data
->str
);
14577 munmap_section_buffer (&data
->ranges
);
14578 munmap_section_buffer (&data
->types
);
14579 munmap_section_buffer (&data
->frame
);
14580 munmap_section_buffer (&data
->eh_frame
);
14581 munmap_section_buffer (&data
->gdb_index
);
14586 /* The contents of the hash table we create when building the string
14588 struct strtab_entry
14590 offset_type offset
;
14594 /* Hash function for a strtab_entry. */
14596 hash_strtab_entry (const void *e
)
14598 const struct strtab_entry
*entry
= e
;
14599 return mapped_index_string_hash (entry
->str
);
14602 /* Equality function for a strtab_entry. */
14604 eq_strtab_entry (const void *a
, const void *b
)
14606 const struct strtab_entry
*ea
= a
;
14607 const struct strtab_entry
*eb
= b
;
14608 return !strcmp (ea
->str
, eb
->str
);
14611 /* Create a strtab_entry hash table. */
14613 create_strtab (void)
14615 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14616 xfree
, xcalloc
, xfree
);
14619 /* Add a string to the constant pool. Return the string's offset in
14622 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14625 struct strtab_entry entry
;
14626 struct strtab_entry
*result
;
14629 slot
= htab_find_slot (table
, &entry
, INSERT
);
14634 result
= XNEW (struct strtab_entry
);
14635 result
->offset
= obstack_object_size (cpool
);
14637 obstack_grow_str0 (cpool
, str
);
14640 return result
->offset
;
14643 /* An entry in the symbol table. */
14644 struct symtab_index_entry
14646 /* The name of the symbol. */
14648 /* The offset of the name in the constant pool. */
14649 offset_type index_offset
;
14650 /* A sorted vector of the indices of all the CUs that hold an object
14652 VEC (offset_type
) *cu_indices
;
14655 /* The symbol table. This is a power-of-2-sized hash table. */
14656 struct mapped_symtab
14658 offset_type n_elements
;
14660 struct symtab_index_entry
**data
;
14663 /* Hash function for a symtab_index_entry. */
14665 hash_symtab_entry (const void *e
)
14667 const struct symtab_index_entry
*entry
= e
;
14668 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14669 sizeof (offset_type
) * VEC_length (offset_type
,
14670 entry
->cu_indices
),
14674 /* Equality function for a symtab_index_entry. */
14676 eq_symtab_entry (const void *a
, const void *b
)
14678 const struct symtab_index_entry
*ea
= a
;
14679 const struct symtab_index_entry
*eb
= b
;
14680 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14681 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14683 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14684 VEC_address (offset_type
, eb
->cu_indices
),
14685 sizeof (offset_type
) * len
);
14688 /* Destroy a symtab_index_entry. */
14690 delete_symtab_entry (void *p
)
14692 struct symtab_index_entry
*entry
= p
;
14693 VEC_free (offset_type
, entry
->cu_indices
);
14697 /* Create a hash table holding symtab_index_entry objects. */
14699 create_index_table (void)
14701 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14702 delete_symtab_entry
, xcalloc
, xfree
);
14705 /* Create a new mapped symtab object. */
14706 static struct mapped_symtab
*
14707 create_mapped_symtab (void)
14709 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14710 symtab
->n_elements
= 0;
14711 symtab
->size
= 1024;
14712 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14716 /* Destroy a mapped_symtab. */
14718 cleanup_mapped_symtab (void *p
)
14720 struct mapped_symtab
*symtab
= p
;
14721 /* The contents of the array are freed when the other hash table is
14723 xfree (symtab
->data
);
14727 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14729 static struct symtab_index_entry
**
14730 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14732 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14734 index
= hash
& (symtab
->size
- 1);
14735 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14739 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14740 return &symtab
->data
[index
];
14741 index
= (index
+ step
) & (symtab
->size
- 1);
14745 /* Expand SYMTAB's hash table. */
14747 hash_expand (struct mapped_symtab
*symtab
)
14749 offset_type old_size
= symtab
->size
;
14751 struct symtab_index_entry
**old_entries
= symtab
->data
;
14754 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14756 for (i
= 0; i
< old_size
; ++i
)
14758 if (old_entries
[i
])
14760 struct symtab_index_entry
**slot
= find_slot (symtab
,
14761 old_entries
[i
]->name
);
14762 *slot
= old_entries
[i
];
14766 xfree (old_entries
);
14769 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14770 is the index of the CU in which the symbol appears. */
14772 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
14773 offset_type cu_index
)
14775 struct symtab_index_entry
**slot
;
14777 ++symtab
->n_elements
;
14778 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
14779 hash_expand (symtab
);
14781 slot
= find_slot (symtab
, name
);
14784 *slot
= XNEW (struct symtab_index_entry
);
14785 (*slot
)->name
= name
;
14786 (*slot
)->cu_indices
= NULL
;
14788 /* Don't push an index twice. Due to how we add entries we only
14789 have to check the last one. */
14790 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
14791 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
14792 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
14795 /* Add a vector of indices to the constant pool. */
14797 add_indices_to_cpool (htab_t index_table
, struct obstack
*cpool
,
14798 struct symtab_index_entry
*entry
)
14802 slot
= htab_find_slot (index_table
, entry
, INSERT
);
14805 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
14806 offset_type val
= MAYBE_SWAP (len
);
14811 entry
->index_offset
= obstack_object_size (cpool
);
14813 obstack_grow (cpool
, &val
, sizeof (val
));
14815 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
14818 val
= MAYBE_SWAP (iter
);
14819 obstack_grow (cpool
, &val
, sizeof (val
));
14824 struct symtab_index_entry
*old_entry
= *slot
;
14825 entry
->index_offset
= old_entry
->index_offset
;
14828 return entry
->index_offset
;
14831 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14832 constant pool entries going into the obstack CPOOL. */
14834 write_hash_table (struct mapped_symtab
*symtab
,
14835 struct obstack
*output
, struct obstack
*cpool
)
14838 htab_t index_table
;
14841 index_table
= create_index_table ();
14842 str_table
= create_strtab ();
14843 /* We add all the index vectors to the constant pool first, to
14844 ensure alignment is ok. */
14845 for (i
= 0; i
< symtab
->size
; ++i
)
14847 if (symtab
->data
[i
])
14848 add_indices_to_cpool (index_table
, cpool
, symtab
->data
[i
]);
14851 /* Now write out the hash table. */
14852 for (i
= 0; i
< symtab
->size
; ++i
)
14854 offset_type str_off
, vec_off
;
14856 if (symtab
->data
[i
])
14858 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
14859 vec_off
= symtab
->data
[i
]->index_offset
;
14863 /* While 0 is a valid constant pool index, it is not valid
14864 to have 0 for both offsets. */
14869 str_off
= MAYBE_SWAP (str_off
);
14870 vec_off
= MAYBE_SWAP (vec_off
);
14872 obstack_grow (output
, &str_off
, sizeof (str_off
));
14873 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
14876 htab_delete (str_table
);
14877 htab_delete (index_table
);
14880 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14881 from PST; CU_INDEX is the index of the CU in the vector of all
14884 add_address_entry (struct objfile
*objfile
,
14885 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
14886 unsigned int cu_index
)
14888 offset_type offset
;
14890 CORE_ADDR baseaddr
;
14892 /* Don't bother recording empty ranges. */
14893 if (pst
->textlow
== pst
->texthigh
)
14896 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14898 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
14899 obstack_grow (addr_obstack
, addr
, 8);
14900 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
14901 obstack_grow (addr_obstack
, addr
, 8);
14902 offset
= MAYBE_SWAP (cu_index
);
14903 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
14906 /* Add a list of partial symbols to SYMTAB. */
14908 write_psymbols (struct mapped_symtab
*symtab
,
14909 struct partial_symbol
**psymp
,
14911 offset_type cu_index
)
14913 for (; count
-- > 0; ++psymp
)
14915 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
14916 error (_("Ada is not currently supported by the index"));
14917 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
14921 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14922 exception if there is an error. */
14924 write_obstack (FILE *file
, struct obstack
*obstack
)
14926 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
14928 != obstack_object_size (obstack
))
14929 error (_("couldn't data write to file"));
14932 /* Unlink a file if the argument is not NULL. */
14934 unlink_if_set (void *p
)
14936 char **filename
= p
;
14938 unlink (*filename
);
14941 /* A helper struct used when iterating over debug_types. */
14942 struct signatured_type_index_data
14944 struct objfile
*objfile
;
14945 struct mapped_symtab
*symtab
;
14946 struct obstack
*types_list
;
14950 /* A helper function that writes a single signatured_type to an
14953 write_one_signatured_type (void **slot
, void *d
)
14955 struct signatured_type_index_data
*info
= d
;
14956 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
14957 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
14958 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
14961 write_psymbols (info
->symtab
,
14962 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
14963 psymtab
->n_global_syms
, info
->cu_index
);
14964 write_psymbols (info
->symtab
,
14965 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
14966 psymtab
->n_static_syms
, info
->cu_index
);
14968 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
14969 obstack_grow (info
->types_list
, val
, 8);
14970 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
14971 obstack_grow (info
->types_list
, val
, 8);
14972 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
14973 obstack_grow (info
->types_list
, val
, 8);
14980 /* Create an index file for OBJFILE in the directory DIR. */
14982 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
14984 struct cleanup
*cleanup
;
14985 char *filename
, *cleanup_filename
;
14986 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
14987 struct obstack cu_list
, types_cu_list
;
14990 struct mapped_symtab
*symtab
;
14991 offset_type val
, size_of_contents
, total_len
;
14995 if (!objfile
->psymtabs
)
14997 if (dwarf2_per_objfile
->using_index
)
14998 error (_("Cannot use an index to create the index"));
15000 if (stat (objfile
->name
, &st
) < 0)
15001 perror_with_name (_("Could not stat"));
15003 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15004 INDEX_SUFFIX
, (char *) NULL
);
15005 cleanup
= make_cleanup (xfree
, filename
);
15007 out_file
= fopen (filename
, "wb");
15009 error (_("Can't open `%s' for writing"), filename
);
15011 cleanup_filename
= filename
;
15012 make_cleanup (unlink_if_set
, &cleanup_filename
);
15014 symtab
= create_mapped_symtab ();
15015 make_cleanup (cleanup_mapped_symtab
, symtab
);
15017 obstack_init (&addr_obstack
);
15018 make_cleanup_obstack_free (&addr_obstack
);
15020 obstack_init (&cu_list
);
15021 make_cleanup_obstack_free (&cu_list
);
15023 obstack_init (&types_cu_list
);
15024 make_cleanup_obstack_free (&types_cu_list
);
15026 /* The list is already sorted, so we don't need to do additional
15027 work here. Also, the debug_types entries do not appear in
15028 all_comp_units, but only in their own hash table. */
15029 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15031 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15032 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15035 write_psymbols (symtab
,
15036 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15037 psymtab
->n_global_syms
, i
);
15038 write_psymbols (symtab
,
15039 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15040 psymtab
->n_static_syms
, i
);
15042 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15044 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15045 obstack_grow (&cu_list
, val
, 8);
15046 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15047 obstack_grow (&cu_list
, val
, 8);
15050 /* Write out the .debug_type entries, if any. */
15051 if (dwarf2_per_objfile
->signatured_types
)
15053 struct signatured_type_index_data sig_data
;
15055 sig_data
.objfile
= objfile
;
15056 sig_data
.symtab
= symtab
;
15057 sig_data
.types_list
= &types_cu_list
;
15058 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15059 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15060 write_one_signatured_type
, &sig_data
);
15063 obstack_init (&constant_pool
);
15064 make_cleanup_obstack_free (&constant_pool
);
15065 obstack_init (&symtab_obstack
);
15066 make_cleanup_obstack_free (&symtab_obstack
);
15067 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15069 obstack_init (&contents
);
15070 make_cleanup_obstack_free (&contents
);
15071 size_of_contents
= 6 * sizeof (offset_type
);
15072 total_len
= size_of_contents
;
15074 /* The version number. */
15075 val
= MAYBE_SWAP (2);
15076 obstack_grow (&contents
, &val
, sizeof (val
));
15078 /* The offset of the CU list from the start of the file. */
15079 val
= MAYBE_SWAP (total_len
);
15080 obstack_grow (&contents
, &val
, sizeof (val
));
15081 total_len
+= obstack_object_size (&cu_list
);
15083 /* The offset of the types CU list from the start of the file. */
15084 val
= MAYBE_SWAP (total_len
);
15085 obstack_grow (&contents
, &val
, sizeof (val
));
15086 total_len
+= obstack_object_size (&types_cu_list
);
15088 /* The offset of the address table from the start of the file. */
15089 val
= MAYBE_SWAP (total_len
);
15090 obstack_grow (&contents
, &val
, sizeof (val
));
15091 total_len
+= obstack_object_size (&addr_obstack
);
15093 /* The offset of the symbol table from the start of the file. */
15094 val
= MAYBE_SWAP (total_len
);
15095 obstack_grow (&contents
, &val
, sizeof (val
));
15096 total_len
+= obstack_object_size (&symtab_obstack
);
15098 /* The offset of the constant pool from the start of the file. */
15099 val
= MAYBE_SWAP (total_len
);
15100 obstack_grow (&contents
, &val
, sizeof (val
));
15101 total_len
+= obstack_object_size (&constant_pool
);
15103 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15105 write_obstack (out_file
, &contents
);
15106 write_obstack (out_file
, &cu_list
);
15107 write_obstack (out_file
, &types_cu_list
);
15108 write_obstack (out_file
, &addr_obstack
);
15109 write_obstack (out_file
, &symtab_obstack
);
15110 write_obstack (out_file
, &constant_pool
);
15114 /* We want to keep the file, so we set cleanup_filename to NULL
15115 here. See unlink_if_set. */
15116 cleanup_filename
= NULL
;
15118 do_cleanups (cleanup
);
15121 /* The mapped index file format is designed to be directly mmap()able
15122 on any architecture. In most cases, a datum is represented using a
15123 little-endian 32-bit integer value, called an offset_type. Big
15124 endian machines must byte-swap the values before using them.
15125 Exceptions to this rule are noted. The data is laid out such that
15126 alignment is always respected.
15128 A mapped index consists of several sections.
15130 1. The file header. This is a sequence of values, of offset_type
15131 unless otherwise noted:
15132 [0] The version number. Currently 1 or 2. The differences are
15133 noted below. Version 1 did not account for .debug_types sections;
15134 the presence of a .debug_types section invalidates any version 1
15135 index that may exist.
15136 [1] The offset, from the start of the file, of the CU list.
15137 [1.5] In version 2, the offset, from the start of the file, of the
15138 types CU list. This offset does not appear in version 1. Note
15139 that this can be empty, in which case this offset will be equal to
15141 [2] The offset, from the start of the file, of the address section.
15142 [3] The offset, from the start of the file, of the symbol table.
15143 [4] The offset, from the start of the file, of the constant pool.
15145 2. The CU list. This is a sequence of pairs of 64-bit
15146 little-endian values, sorted by the CU offset. The first element
15147 in each pair is the offset of a CU in the .debug_info section. The
15148 second element in each pair is the length of that CU. References
15149 to a CU elsewhere in the map are done using a CU index, which is
15150 just the 0-based index into this table. Note that if there are
15151 type CUs, then conceptually CUs and type CUs form a single list for
15152 the purposes of CU indices.
15154 2.5 The types CU list. This does not appear in a version 1 index.
15155 This is a sequence of triplets of 64-bit little-endian values. In
15156 a triplet, the first value is the CU offset, the second value is
15157 the type offset in the CU, and the third value is the type
15158 signature. The types CU list is not sorted.
15160 3. The address section. The address section consists of a sequence
15161 of address entries. Each address entry has three elements.
15162 [0] The low address. This is a 64-bit little-endian value.
15163 [1] The high address. This is a 64-bit little-endian value.
15164 [2] The CU index. This is an offset_type value.
15166 4. The symbol table. This is a hash table. The size of the hash
15167 table is always a power of 2. The initial hash and the step are
15168 currently defined by the `find_slot' function.
15170 Each slot in the hash table consists of a pair of offset_type
15171 values. The first value is the offset of the symbol's name in the
15172 constant pool. The second value is the offset of the CU vector in
15175 If both values are 0, then this slot in the hash table is empty.
15176 This is ok because while 0 is a valid constant pool index, it
15177 cannot be a valid index for both a string and a CU vector.
15179 A string in the constant pool is stored as a \0-terminated string,
15182 A CU vector in the constant pool is a sequence of offset_type
15183 values. The first value is the number of CU indices in the vector.
15184 Each subsequent value is the index of a CU in the CU list. This
15185 element in the hash table is used to indicate which CUs define the
15188 5. The constant pool. This is simply a bunch of bytes. It is
15189 organized so that alignment is correct: CU vectors are stored
15190 first, followed by strings. */
15192 save_gdb_index_command (char *arg
, int from_tty
)
15194 struct objfile
*objfile
;
15197 error (_("usage: save gdb-index DIRECTORY"));
15199 ALL_OBJFILES (objfile
)
15203 /* If the objfile does not correspond to an actual file, skip it. */
15204 if (stat (objfile
->name
, &st
) < 0)
15207 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15208 if (dwarf2_per_objfile
)
15210 volatile struct gdb_exception except
;
15212 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15214 write_psymtabs_to_index (objfile
, arg
);
15216 if (except
.reason
< 0)
15217 exception_fprintf (gdb_stderr
, except
,
15218 _("Error while writing index for `%s': "),
15226 int dwarf2_always_disassemble
;
15229 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15230 struct cmd_list_element
*c
, const char *value
)
15232 fprintf_filtered (file
, _("\
15233 Whether to always disassemble DWARF expressions is %s.\n"),
15237 void _initialize_dwarf2_read (void);
15240 _initialize_dwarf2_read (void)
15242 struct cmd_list_element
*c
;
15244 dwarf2_objfile_data_key
15245 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15247 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15248 Set DWARF 2 specific variables.\n\
15249 Configure DWARF 2 variables such as the cache size"),
15250 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15251 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15253 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15254 Show DWARF 2 specific variables\n\
15255 Show DWARF 2 variables such as the cache size"),
15256 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15257 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15259 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15260 &dwarf2_max_cache_age
, _("\
15261 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15262 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15263 A higher limit means that cached compilation units will be stored\n\
15264 in memory longer, and more total memory will be used. Zero disables\n\
15265 caching, which can slow down startup."),
15267 show_dwarf2_max_cache_age
,
15268 &set_dwarf2_cmdlist
,
15269 &show_dwarf2_cmdlist
);
15271 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15272 &dwarf2_always_disassemble
, _("\
15273 Set whether `info address' always disassembles DWARF expressions."), _("\
15274 Show whether `info address' always disassembles DWARF expressions."), _("\
15275 When enabled, DWARF expressions are always printed in an assembly-like\n\
15276 syntax. When disabled, expressions will be printed in a more\n\
15277 conversational style, when possible."),
15279 show_dwarf2_always_disassemble
,
15280 &set_dwarf2_cmdlist
,
15281 &show_dwarf2_cmdlist
);
15283 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15284 Set debugging of the dwarf2 DIE reader."), _("\
15285 Show debugging of the dwarf2 DIE reader."), _("\
15286 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15287 The value is the maximum depth to print."),
15290 &setdebuglist
, &showdebuglist
);
15292 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15293 _("Save a .gdb-index file"),
15295 set_cmd_completer (c
, filename_completer
);