1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The hash table. */
158 const offset_type
*index_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index. */
208 unsigned char using_index
;
210 /* The mapped index. */
211 struct mapped_index
*index_table
;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols
;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash
;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash
;
228 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size
;
261 unsigned char signed_addr_p
;
262 unsigned int abbrev_offset
;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size
;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size
;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset
;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info
*die
;
299 typedef struct delayed_method_info delayed_method_info
;
300 DEF_VEC_O (delayed_method_info
);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile
*objfile
;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header
;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address
;
314 /* Non-zero if base_address has been set. */
317 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
319 /* The language we are debugging. */
320 enum language language
;
321 const struct language_defn
*language_defn
;
323 const char *producer
;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending
**list_in_scope
;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info
**dwarf2_abbrevs
;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack
;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack
;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data
*read_in_chain
;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data
*per_cu
;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info
*dies
;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header
*line_header
;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info
) *method_list
;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark
: 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr
: 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info
: 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header
*lines
;
401 /* The file names from the line table. */
402 const char **file_names
;
403 /* The file names from the line table after being run through
405 const char **full_names
;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab
*symtab
;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark
: 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines
: 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length
: 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued
: 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies
: 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types
: 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu
*cu
;
453 /* The corresponding objfile. */
454 struct objfile
*objfile
;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab
*psymtab
;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data
*quick
;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset
;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu
;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu
*cu
;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte
*buffer
;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length
;
511 unsigned short version
;
512 unsigned int header_length
;
513 unsigned char minimum_instruction_length
;
514 unsigned char maximum_ops_per_instruction
;
515 unsigned char default_is_stmt
;
517 unsigned char line_range
;
518 unsigned char opcode_base
;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths
;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs
, include_dirs_size
;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names
, file_names_size
;
540 unsigned int dir_index
;
541 unsigned int mod_time
;
543 int included_p
; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab
*symtab
; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte
*statement_program_start
, *statement_program_end
;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children
: 1;
564 unsigned int is_external
: 1;
565 unsigned int is_declaration
: 1;
566 unsigned int has_type
: 1;
567 unsigned int has_specification
: 1;
568 unsigned int has_pc_info
: 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set
: 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size
: 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments
: 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block
*locdesc
;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset
;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number
; /* number identifying abbrev */
614 enum dwarf_tag tag
; /* dwarf tag */
615 unsigned short has_children
; /* boolean */
616 unsigned short num_attrs
; /* number of attributes */
617 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
618 struct abbrev_info
*next
; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
624 ENUM_BITFIELD(dwarf_form
) form
: 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
631 ENUM_BITFIELD(dwarf_form
) form
: 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical
: 1;
641 struct dwarf_block
*blk
;
645 struct signatured_type
*signatured_type
;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
656 /* Number of attributes */
657 unsigned char num_attrs
;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname
: 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields, terminated by a die whose
674 struct die_info
*child
; /* Its first child, if any. */
675 struct die_info
*sibling
; /* Its next sibling, if any. */
676 struct die_info
*parent
; /* Its parent, if any. */
678 /* An array of attributes, with NUM_ATTRS elements. There may be
679 zero, but it's not common and zero-sized arrays are not
680 sufficiently portable C. */
681 struct attribute attrs
[1];
684 struct function_range
687 CORE_ADDR lowpc
, highpc
;
689 struct function_range
*next
;
692 /* Get at parts of an attribute structure */
694 #define DW_STRING(attr) ((attr)->u.str)
695 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
696 #define DW_UNSND(attr) ((attr)->u.unsnd)
697 #define DW_BLOCK(attr) ((attr)->u.blk)
698 #define DW_SND(attr) ((attr)->u.snd)
699 #define DW_ADDR(attr) ((attr)->u.addr)
700 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
702 /* Blocks are a bunch of untyped bytes. */
709 #ifndef ATTR_ALLOC_CHUNK
710 #define ATTR_ALLOC_CHUNK 4
713 /* Allocate fields for structs, unions and enums in this size. */
714 #ifndef DW_FIELD_ALLOC_CHUNK
715 #define DW_FIELD_ALLOC_CHUNK 4
718 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
719 but this would require a corresponding change in unpack_field_as_long
721 static int bits_per_byte
= 8;
723 /* The routines that read and process dies for a C struct or C++ class
724 pass lists of data member fields and lists of member function fields
725 in an instance of a field_info structure, as defined below. */
728 /* List of data member and baseclasses fields. */
731 struct nextfield
*next
;
736 *fields
, *baseclasses
;
738 /* Number of fields (including baseclasses). */
741 /* Number of baseclasses. */
744 /* Set if the accesibility of one of the fields is not public. */
745 int non_public_fields
;
747 /* Member function fields array, entries are allocated in the order they
748 are encountered in the object file. */
751 struct nextfnfield
*next
;
752 struct fn_field fnfield
;
756 /* Member function fieldlist array, contains name of possibly overloaded
757 member function, number of overloaded member functions and a pointer
758 to the head of the member function field chain. */
763 struct nextfnfield
*head
;
767 /* Number of entries in the fnfieldlists array. */
770 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
771 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
772 struct typedef_field_list
774 struct typedef_field field
;
775 struct typedef_field_list
*next
;
778 unsigned typedef_field_list_count
;
781 /* One item on the queue of compilation units to read in full symbols
783 struct dwarf2_queue_item
785 struct dwarf2_per_cu_data
*per_cu
;
786 struct dwarf2_queue_item
*next
;
789 /* The current queue. */
790 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
792 /* Loaded secondary compilation units are kept in memory until they
793 have not been referenced for the processing of this many
794 compilation units. Set this to zero to disable caching. Cache
795 sizes of up to at least twenty will improve startup time for
796 typical inter-CU-reference binaries, at an obvious memory cost. */
797 static int dwarf2_max_cache_age
= 5;
799 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
800 struct cmd_list_element
*c
, const char *value
)
802 fprintf_filtered (file
, _("\
803 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
808 /* Various complaints about symbol reading that don't abort the process */
811 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
813 complaint (&symfile_complaints
,
814 _("statement list doesn't fit in .debug_line section"));
818 dwarf2_debug_line_missing_file_complaint (void)
820 complaint (&symfile_complaints
,
821 _(".debug_line section has line data without a file"));
825 dwarf2_debug_line_missing_end_sequence_complaint (void)
827 complaint (&symfile_complaints
,
828 _(".debug_line section has line program sequence without an end"));
832 dwarf2_complex_location_expr_complaint (void)
834 complaint (&symfile_complaints
, _("location expression too complex"));
838 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
841 complaint (&symfile_complaints
,
842 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
847 dwarf2_macros_too_long_complaint (void)
849 complaint (&symfile_complaints
,
850 _("macro info runs off end of `.debug_macinfo' section"));
854 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
856 complaint (&symfile_complaints
,
857 _("macro debug info contains a malformed macro definition:\n`%s'"),
862 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
864 complaint (&symfile_complaints
,
865 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
868 /* local function prototypes */
870 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
872 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
875 static void dwarf2_build_psymtabs_hard (struct objfile
*);
877 static void scan_partial_symbols (struct partial_die_info
*,
878 CORE_ADDR
*, CORE_ADDR
*,
879 int, struct dwarf2_cu
*);
881 static void add_partial_symbol (struct partial_die_info
*,
884 static void add_partial_namespace (struct partial_die_info
*pdi
,
885 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
886 int need_pc
, struct dwarf2_cu
*cu
);
888 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
889 CORE_ADDR
*highpc
, int need_pc
,
890 struct dwarf2_cu
*cu
);
892 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
893 struct dwarf2_cu
*cu
);
895 static void add_partial_subprogram (struct partial_die_info
*pdi
,
896 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
897 int need_pc
, struct dwarf2_cu
*cu
);
899 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
900 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
901 bfd
*abfd
, struct dwarf2_cu
*cu
);
903 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
905 static void psymtab_to_symtab_1 (struct partial_symtab
*);
907 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
909 static void dwarf2_free_abbrev_table (void *);
911 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
914 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
917 static struct partial_die_info
*load_partial_dies (bfd
*,
918 gdb_byte
*, gdb_byte
*,
919 int, struct dwarf2_cu
*);
921 static gdb_byte
*read_partial_die (struct partial_die_info
*,
922 struct abbrev_info
*abbrev
,
924 gdb_byte
*, gdb_byte
*,
927 static struct partial_die_info
*find_partial_die (unsigned int,
930 static void fixup_partial_die (struct partial_die_info
*,
933 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
934 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
936 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
937 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
939 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
941 static int read_1_signed_byte (bfd
*, gdb_byte
*);
943 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
945 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
947 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
949 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
952 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
954 static LONGEST read_checked_initial_length_and_offset
955 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
956 unsigned int *, unsigned int *);
958 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
961 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
963 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
965 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
967 static char *read_indirect_string (bfd
*, gdb_byte
*,
968 const struct comp_unit_head
*,
971 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
973 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
975 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
977 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
979 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
982 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
986 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
987 struct dwarf2_cu
*cu
);
989 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
991 static struct die_info
*die_specification (struct die_info
*die
,
992 struct dwarf2_cu
**);
994 static void free_line_header (struct line_header
*lh
);
996 static void add_file_name (struct line_header
*, char *, unsigned int,
997 unsigned int, unsigned int);
999 static struct line_header
*(dwarf_decode_line_header
1000 (unsigned int offset
,
1001 bfd
*abfd
, struct dwarf2_cu
*cu
));
1003 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
1004 struct dwarf2_cu
*, struct partial_symtab
*);
1006 static void dwarf2_start_subfile (char *, char *, char *);
1008 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1009 struct dwarf2_cu
*);
1011 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1012 struct dwarf2_cu
*, struct symbol
*);
1014 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1015 struct dwarf2_cu
*);
1017 static void dwarf2_const_value_attr (struct attribute
*attr
,
1020 struct obstack
*obstack
,
1021 struct dwarf2_cu
*cu
, long *value
,
1023 struct dwarf2_locexpr_baton
**baton
);
1025 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1027 static int need_gnat_info (struct dwarf2_cu
*);
1029 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
1031 static void set_descriptive_type (struct type
*, struct die_info
*,
1032 struct dwarf2_cu
*);
1034 static struct type
*die_containing_type (struct die_info
*,
1035 struct dwarf2_cu
*);
1037 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1038 struct dwarf2_cu
*);
1040 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1042 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1044 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1046 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1047 const char *suffix
, int physname
,
1048 struct dwarf2_cu
*cu
);
1050 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1052 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1054 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1056 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1058 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1059 struct dwarf2_cu
*, struct partial_symtab
*);
1061 static int dwarf2_get_pc_bounds (struct die_info
*,
1062 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1063 struct partial_symtab
*);
1065 static void get_scope_pc_bounds (struct die_info
*,
1066 CORE_ADDR
*, CORE_ADDR
*,
1067 struct dwarf2_cu
*);
1069 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1070 CORE_ADDR
, struct dwarf2_cu
*);
1072 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1073 struct dwarf2_cu
*);
1075 static void dwarf2_attach_fields_to_type (struct field_info
*,
1076 struct type
*, struct dwarf2_cu
*);
1078 static void dwarf2_add_member_fn (struct field_info
*,
1079 struct die_info
*, struct type
*,
1080 struct dwarf2_cu
*);
1082 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1083 struct type
*, struct dwarf2_cu
*);
1085 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1087 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1089 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1091 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1093 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1095 static struct type
*read_module_type (struct die_info
*die
,
1096 struct dwarf2_cu
*cu
);
1098 static const char *namespace_name (struct die_info
*die
,
1099 int *is_anonymous
, struct dwarf2_cu
*);
1101 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1103 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1105 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1106 struct dwarf2_cu
*);
1108 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1110 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1112 gdb_byte
**new_info_ptr
,
1113 struct die_info
*parent
);
1115 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1117 gdb_byte
**new_info_ptr
,
1118 struct die_info
*parent
);
1120 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1122 gdb_byte
**new_info_ptr
,
1123 struct die_info
*parent
);
1125 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1126 struct die_info
**, gdb_byte
*,
1129 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1131 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1134 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1136 static const char *dwarf2_full_name (char *name
,
1137 struct die_info
*die
,
1138 struct dwarf2_cu
*cu
);
1140 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1141 struct dwarf2_cu
**);
1143 static char *dwarf_tag_name (unsigned int);
1145 static char *dwarf_attr_name (unsigned int);
1147 static char *dwarf_form_name (unsigned int);
1149 static char *dwarf_bool_name (unsigned int);
1151 static char *dwarf_type_encoding_name (unsigned int);
1154 static char *dwarf_cfi_name (unsigned int);
1157 static struct die_info
*sibling_die (struct die_info
*);
1159 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1161 static void dump_die_for_error (struct die_info
*);
1163 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1166 /*static*/ void dump_die (struct die_info
*, int max_level
);
1168 static void store_in_ref_table (struct die_info
*,
1169 struct dwarf2_cu
*);
1171 static int is_ref_attr (struct attribute
*);
1173 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1175 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1177 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1179 struct dwarf2_cu
**);
1181 static struct die_info
*follow_die_ref (struct die_info
*,
1183 struct dwarf2_cu
**);
1185 static struct die_info
*follow_die_sig (struct die_info
*,
1187 struct dwarf2_cu
**);
1189 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1190 unsigned int offset
);
1192 static void read_signatured_type (struct objfile
*,
1193 struct signatured_type
*type_sig
);
1195 /* memory allocation interface */
1197 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1199 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1201 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1203 static void initialize_cu_func_list (struct dwarf2_cu
*);
1205 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1206 struct dwarf2_cu
*);
1208 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1209 char *, bfd
*, struct dwarf2_cu
*);
1211 static int attr_form_is_block (struct attribute
*);
1213 static int attr_form_is_section_offset (struct attribute
*);
1215 static int attr_form_is_constant (struct attribute
*);
1217 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1219 struct dwarf2_cu
*cu
);
1221 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1222 struct abbrev_info
*abbrev
,
1223 struct dwarf2_cu
*cu
);
1225 static void free_stack_comp_unit (void *);
1227 static hashval_t
partial_die_hash (const void *item
);
1229 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1231 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1232 (unsigned int offset
, struct objfile
*objfile
);
1234 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1235 (unsigned int offset
, struct objfile
*objfile
);
1237 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1239 static void free_one_comp_unit (void *);
1241 static void free_cached_comp_units (void *);
1243 static void age_cached_comp_units (void);
1245 static void free_one_cached_comp_unit (void *);
1247 static struct type
*set_die_type (struct die_info
*, struct type
*,
1248 struct dwarf2_cu
*);
1250 static void create_all_comp_units (struct objfile
*);
1252 static int create_debug_types_hash_table (struct objfile
*objfile
);
1254 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1257 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1259 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1260 struct dwarf2_per_cu_data
*);
1262 static void dwarf2_mark (struct dwarf2_cu
*);
1264 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1266 static struct type
*get_die_type_at_offset (unsigned int,
1267 struct dwarf2_per_cu_data
*per_cu
);
1269 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1271 static void dwarf2_release_queue (void *dummy
);
1273 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1274 struct objfile
*objfile
);
1276 static void process_queue (struct objfile
*objfile
);
1278 static void find_file_and_directory (struct die_info
*die
,
1279 struct dwarf2_cu
*cu
,
1280 char **name
, char **comp_dir
);
1282 static char *file_full_name (int file
, struct line_header
*lh
,
1283 const char *comp_dir
);
1285 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1288 unsigned int buffer_size
,
1291 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1292 struct dwarf2_cu
*cu
);
1294 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1298 /* Convert VALUE between big- and little-endian. */
1300 byte_swap (offset_type value
)
1304 result
= (value
& 0xff) << 24;
1305 result
|= (value
& 0xff00) << 8;
1306 result
|= (value
& 0xff0000) >> 8;
1307 result
|= (value
& 0xff000000) >> 24;
1311 #define MAYBE_SWAP(V) byte_swap (V)
1314 #define MAYBE_SWAP(V) (V)
1315 #endif /* WORDS_BIGENDIAN */
1317 /* The suffix for an index file. */
1318 #define INDEX_SUFFIX ".gdb-index"
1320 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1321 struct dwarf2_cu
*cu
);
1323 /* Try to locate the sections we need for DWARF 2 debugging
1324 information and return true if we have enough to do something. */
1327 dwarf2_has_info (struct objfile
*objfile
)
1329 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1330 if (!dwarf2_per_objfile
)
1332 /* Initialize per-objfile state. */
1333 struct dwarf2_per_objfile
*data
1334 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1336 memset (data
, 0, sizeof (*data
));
1337 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1338 dwarf2_per_objfile
= data
;
1340 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1341 dwarf2_per_objfile
->objfile
= objfile
;
1343 return (dwarf2_per_objfile
->info
.asection
!= NULL
1344 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1347 /* When loading sections, we can either look for ".<name>", or for
1348 * ".z<name>", which indicates a compressed section. */
1351 section_is_p (const char *section_name
, const char *name
)
1353 return (section_name
[0] == '.'
1354 && (strcmp (section_name
+ 1, name
) == 0
1355 || (section_name
[1] == 'z'
1356 && strcmp (section_name
+ 2, name
) == 0)));
1359 /* This function is mapped across the sections and remembers the
1360 offset and size of each of the debugging sections we are interested
1364 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1366 if (section_is_p (sectp
->name
, INFO_SECTION
))
1368 dwarf2_per_objfile
->info
.asection
= sectp
;
1369 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1371 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1373 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1374 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1376 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1378 dwarf2_per_objfile
->line
.asection
= sectp
;
1379 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1381 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1383 dwarf2_per_objfile
->loc
.asection
= sectp
;
1384 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1386 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1388 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1389 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1391 else if (section_is_p (sectp
->name
, STR_SECTION
))
1393 dwarf2_per_objfile
->str
.asection
= sectp
;
1394 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1396 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1398 dwarf2_per_objfile
->frame
.asection
= sectp
;
1399 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1401 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1403 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1405 if (aflag
& SEC_HAS_CONTENTS
)
1407 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1408 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1411 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1413 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1414 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1416 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1418 dwarf2_per_objfile
->types
.asection
= sectp
;
1419 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1421 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1423 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1424 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1427 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1428 && bfd_section_vma (abfd
, sectp
) == 0)
1429 dwarf2_per_objfile
->has_section_at_zero
= 1;
1432 /* Decompress a section that was compressed using zlib. Store the
1433 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1436 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1437 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1439 bfd
*abfd
= objfile
->obfd
;
1441 error (_("Support for zlib-compressed DWARF data (from '%s') "
1442 "is disabled in this copy of GDB"),
1443 bfd_get_filename (abfd
));
1445 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1446 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1447 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1448 bfd_size_type uncompressed_size
;
1449 gdb_byte
*uncompressed_buffer
;
1452 int header_size
= 12;
1454 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1455 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1456 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1457 bfd_get_filename (abfd
));
1459 /* Read the zlib header. In this case, it should be "ZLIB" followed
1460 by the uncompressed section size, 8 bytes in big-endian order. */
1461 if (compressed_size
< header_size
1462 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1463 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1464 bfd_get_filename (abfd
));
1465 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1466 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1467 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1472 uncompressed_size
+= compressed_buffer
[11];
1474 /* It is possible the section consists of several compressed
1475 buffers concatenated together, so we uncompress in a loop. */
1479 strm
.avail_in
= compressed_size
- header_size
;
1480 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1481 strm
.avail_out
= uncompressed_size
;
1482 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1484 rc
= inflateInit (&strm
);
1485 while (strm
.avail_in
> 0)
1488 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1489 bfd_get_filename (abfd
), rc
);
1490 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1491 + (uncompressed_size
- strm
.avail_out
));
1492 rc
= inflate (&strm
, Z_FINISH
);
1493 if (rc
!= Z_STREAM_END
)
1494 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1495 bfd_get_filename (abfd
), rc
);
1496 rc
= inflateReset (&strm
);
1498 rc
= inflateEnd (&strm
);
1500 || strm
.avail_out
!= 0)
1501 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1502 bfd_get_filename (abfd
), rc
);
1504 do_cleanups (cleanup
);
1505 *outbuf
= uncompressed_buffer
;
1506 *outsize
= uncompressed_size
;
1510 /* Read the contents of the section SECTP from object file specified by
1511 OBJFILE, store info about the section into INFO.
1512 If the section is compressed, uncompress it before returning. */
1515 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1517 bfd
*abfd
= objfile
->obfd
;
1518 asection
*sectp
= info
->asection
;
1519 gdb_byte
*buf
, *retbuf
;
1520 unsigned char header
[4];
1524 info
->buffer
= NULL
;
1525 info
->was_mmapped
= 0;
1528 if (info
->asection
== NULL
|| info
->size
== 0)
1531 /* Check if the file has a 4-byte header indicating compression. */
1532 if (info
->size
> sizeof (header
)
1533 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1534 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1536 /* Upon decompression, update the buffer and its size. */
1537 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1539 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1547 pagesize
= getpagesize ();
1549 /* Only try to mmap sections which are large enough: we don't want to
1550 waste space due to fragmentation. Also, only try mmap for sections
1551 without relocations. */
1553 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1555 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1556 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1557 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1558 MAP_PRIVATE
, pg_offset
);
1560 if (retbuf
!= MAP_FAILED
)
1562 info
->was_mmapped
= 1;
1563 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1564 #if HAVE_POSIX_MADVISE
1565 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1572 /* If we get here, we are a normal, not-compressed section. */
1574 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1576 /* When debugging .o files, we may need to apply relocations; see
1577 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1578 We never compress sections in .o files, so we only need to
1579 try this when the section is not compressed. */
1580 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1583 info
->buffer
= retbuf
;
1587 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1588 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1589 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1590 bfd_get_filename (abfd
));
1593 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1597 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1598 asection
**sectp
, gdb_byte
**bufp
,
1599 bfd_size_type
*sizep
)
1601 struct dwarf2_per_objfile
*data
1602 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1603 struct dwarf2_section_info
*info
;
1605 /* We may see an objfile without any DWARF, in which case we just
1614 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1615 info
= &data
->eh_frame
;
1616 else if (section_is_p (section_name
, FRAME_SECTION
))
1617 info
= &data
->frame
;
1619 gdb_assert_not_reached ("unexpected section");
1621 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1622 /* We haven't read this section in yet. Do it now. */
1623 dwarf2_read_section (objfile
, info
);
1625 *sectp
= info
->asection
;
1626 *bufp
= info
->buffer
;
1627 *sizep
= info
->size
;
1632 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1635 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1636 struct dwarf2_per_cu_data
*per_cu
)
1638 struct cleanup
*back_to
;
1640 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1642 queue_comp_unit (per_cu
, objfile
);
1644 if (per_cu
->from_debug_types
)
1645 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1647 load_full_comp_unit (per_cu
, objfile
);
1649 process_queue (objfile
);
1651 /* Age the cache, releasing compilation units that have not
1652 been used recently. */
1653 age_cached_comp_units ();
1655 do_cleanups (back_to
);
1658 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1659 the objfile from which this CU came. Returns the resulting symbol
1661 static struct symtab
*
1662 dw2_instantiate_symtab (struct objfile
*objfile
,
1663 struct dwarf2_per_cu_data
*per_cu
)
1665 if (!per_cu
->v
.quick
->symtab
)
1667 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1668 increment_reading_symtab ();
1669 dw2_do_instantiate_symtab (objfile
, per_cu
);
1670 do_cleanups (back_to
);
1672 return per_cu
->v
.quick
->symtab
;
1675 /* Return the CU given its index. */
1676 static struct dwarf2_per_cu_data
*
1677 dw2_get_cu (int index
)
1679 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1681 index
-= dwarf2_per_objfile
->n_comp_units
;
1682 return dwarf2_per_objfile
->type_comp_units
[index
];
1684 return dwarf2_per_objfile
->all_comp_units
[index
];
1687 /* A helper function that knows how to read a 64-bit value in a way
1688 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1691 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1693 if (sizeof (ULONGEST
) < 8)
1697 /* Ignore the upper 4 bytes if they are all zero. */
1698 for (i
= 0; i
< 4; ++i
)
1699 if (bytes
[i
+ 4] != 0)
1702 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1705 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1709 /* Read the CU list from the mapped index, and use it to create all
1710 the CU objects for this objfile. Return 0 if something went wrong,
1711 1 if everything went ok. */
1713 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1714 offset_type cu_list_elements
)
1718 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1719 dwarf2_per_objfile
->all_comp_units
1720 = obstack_alloc (&objfile
->objfile_obstack
,
1721 dwarf2_per_objfile
->n_comp_units
1722 * sizeof (struct dwarf2_per_cu_data
*));
1724 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1726 struct dwarf2_per_cu_data
*the_cu
;
1727 ULONGEST offset
, length
;
1729 if (!extract_cu_value (cu_list
, &offset
)
1730 || !extract_cu_value (cu_list
+ 8, &length
))
1734 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1735 struct dwarf2_per_cu_data
);
1736 the_cu
->offset
= offset
;
1737 the_cu
->length
= length
;
1738 the_cu
->objfile
= objfile
;
1739 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1740 struct dwarf2_per_cu_quick_data
);
1741 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1747 /* Create the signatured type hash table from the index. */
1750 create_signatured_type_table_from_index (struct objfile
*objfile
,
1751 const gdb_byte
*bytes
,
1752 offset_type elements
)
1755 htab_t sig_types_hash
;
1757 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1758 dwarf2_per_objfile
->type_comp_units
1759 = obstack_alloc (&objfile
->objfile_obstack
,
1760 dwarf2_per_objfile
->n_type_comp_units
1761 * sizeof (struct dwarf2_per_cu_data
*));
1763 sig_types_hash
= allocate_signatured_type_table (objfile
);
1765 for (i
= 0; i
< elements
; i
+= 3)
1767 struct signatured_type
*type_sig
;
1768 ULONGEST offset
, type_offset
, signature
;
1771 if (!extract_cu_value (bytes
, &offset
)
1772 || !extract_cu_value (bytes
+ 8, &type_offset
))
1774 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1777 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1778 struct signatured_type
);
1779 type_sig
->signature
= signature
;
1780 type_sig
->offset
= offset
;
1781 type_sig
->type_offset
= type_offset
;
1782 type_sig
->per_cu
.from_debug_types
= 1;
1783 type_sig
->per_cu
.offset
= offset
;
1784 type_sig
->per_cu
.objfile
= objfile
;
1785 type_sig
->per_cu
.v
.quick
1786 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1787 struct dwarf2_per_cu_quick_data
);
1789 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1792 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1795 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1800 /* Read the address map data from the mapped index, and use it to
1801 populate the objfile's psymtabs_addrmap. */
1803 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1805 const gdb_byte
*iter
, *end
;
1806 struct obstack temp_obstack
;
1807 struct addrmap
*mutable_map
;
1808 struct cleanup
*cleanup
;
1811 obstack_init (&temp_obstack
);
1812 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1813 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1815 iter
= index
->address_table
;
1816 end
= iter
+ index
->address_table_size
;
1818 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1822 ULONGEST hi
, lo
, cu_index
;
1823 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1825 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1827 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1830 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1831 dw2_get_cu (cu_index
));
1834 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1835 &objfile
->objfile_obstack
);
1836 do_cleanups (cleanup
);
1839 /* The hash function for strings in the mapped index. This is the
1840 same as the hashtab.c hash function, but we keep a separate copy to
1841 maintain control over the implementation. This is necessary
1842 because the hash function is tied to the format of the mapped index
1845 mapped_index_string_hash (const void *p
)
1847 const unsigned char *str
= (const unsigned char *) p
;
1851 while ((c
= *str
++) != 0)
1852 r
= r
* 67 + c
- 113;
1857 /* Find a slot in the mapped index INDEX for the object named NAME.
1858 If NAME is found, set *VEC_OUT to point to the CU vector in the
1859 constant pool and return 1. If NAME cannot be found, return 0. */
1861 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1862 offset_type
**vec_out
)
1864 offset_type hash
= mapped_index_string_hash (name
);
1865 offset_type slot
, step
;
1867 slot
= hash
& (index
->index_table_slots
- 1);
1868 step
= ((hash
* 17) & (index
->index_table_slots
- 1)) | 1;
1872 /* Convert a slot number to an offset into the table. */
1873 offset_type i
= 2 * slot
;
1875 if (index
->index_table
[i
] == 0 && index
->index_table
[i
+ 1] == 0)
1878 str
= index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[i
]);
1879 if (!strcmp (name
, str
))
1881 *vec_out
= (offset_type
*) (index
->constant_pool
1882 + MAYBE_SWAP (index
->index_table
[i
+ 1]));
1886 slot
= (slot
+ step
) & (index
->index_table_slots
- 1);
1890 /* Read the index file. If everything went ok, initialize the "quick"
1891 elements of all the CUs and return 1. Otherwise, return 0. */
1893 dwarf2_read_index (struct objfile
*objfile
)
1896 struct mapped_index
*map
;
1897 offset_type
*metadata
;
1898 const gdb_byte
*cu_list
;
1899 const gdb_byte
*types_list
= NULL
;
1900 offset_type version
, cu_list_elements
;
1901 offset_type types_list_elements
= 0;
1904 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
1905 || dwarf2_per_objfile
->gdb_index
.size
== 0)
1907 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1909 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1910 /* Version check. */
1911 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1914 /* Index version 1 neglected to account for .debug_types. So,
1915 if we see .debug_types, we cannot use this index. */
1916 if (dwarf2_per_objfile
->types
.asection
!= NULL
1917 && dwarf2_per_objfile
->types
.size
!= 0)
1920 else if (version
!= 2)
1923 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1924 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1926 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1929 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1930 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1936 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1937 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1938 - MAYBE_SWAP (metadata
[i
]))
1943 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1944 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1945 - MAYBE_SWAP (metadata
[i
]));
1948 map
->index_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1949 map
->index_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1950 - MAYBE_SWAP (metadata
[i
]))
1951 / (2 * sizeof (offset_type
)));
1954 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1956 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1960 && types_list_elements
1961 && !create_signatured_type_table_from_index (objfile
, types_list
,
1962 types_list_elements
))
1965 create_addrmap_from_index (objfile
, map
);
1967 dwarf2_per_objfile
->index_table
= map
;
1968 dwarf2_per_objfile
->using_index
= 1;
1973 /* A helper for the "quick" functions which sets the global
1974 dwarf2_per_objfile according to OBJFILE. */
1976 dw2_setup (struct objfile
*objfile
)
1978 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1979 gdb_assert (dwarf2_per_objfile
);
1982 /* A helper for the "quick" functions which attempts to read the line
1983 table for THIS_CU. */
1985 dw2_require_line_header (struct objfile
*objfile
,
1986 struct dwarf2_per_cu_data
*this_cu
)
1988 bfd
*abfd
= objfile
->obfd
;
1989 struct line_header
*lh
= NULL
;
1990 struct attribute
*attr
;
1991 struct cleanup
*cleanups
;
1992 struct die_info
*comp_unit_die
;
1993 struct dwarf2_section_info
* sec
;
1994 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
1995 int has_children
, i
;
1996 struct dwarf2_cu cu
;
1997 unsigned int bytes_read
, buffer_size
;
1998 struct die_reader_specs reader_specs
;
1999 char *name
, *comp_dir
;
2001 if (this_cu
->v
.quick
->read_lines
)
2003 this_cu
->v
.quick
->read_lines
= 1;
2005 memset (&cu
, 0, sizeof (cu
));
2006 cu
.objfile
= objfile
;
2007 obstack_init (&cu
.comp_unit_obstack
);
2009 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2011 if (this_cu
->from_debug_types
)
2012 sec
= &dwarf2_per_objfile
->types
;
2014 sec
= &dwarf2_per_objfile
->info
;
2015 dwarf2_read_section (objfile
, sec
);
2016 buffer_size
= sec
->size
;
2017 buffer
= sec
->buffer
;
2018 info_ptr
= buffer
+ this_cu
->offset
;
2019 beg_of_comp_unit
= info_ptr
;
2021 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2022 buffer
, buffer_size
,
2025 /* Complete the cu_header. */
2026 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2027 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2030 cu
.per_cu
= this_cu
;
2032 dwarf2_read_abbrevs (abfd
, &cu
);
2033 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2035 if (this_cu
->from_debug_types
)
2036 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2037 init_cu_die_reader (&reader_specs
, &cu
);
2038 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2041 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2044 unsigned int line_offset
= DW_UNSND (attr
);
2045 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2049 do_cleanups (cleanups
);
2053 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2055 this_cu
->v
.quick
->lines
= lh
;
2057 this_cu
->v
.quick
->file_names
2058 = obstack_alloc (&objfile
->objfile_obstack
,
2059 lh
->num_file_names
* sizeof (char *));
2060 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2061 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2063 do_cleanups (cleanups
);
2066 /* A helper for the "quick" functions which computes and caches the
2067 real path for a given file name from the line table.
2068 dw2_require_line_header must have been called before this is
2071 dw2_require_full_path (struct objfile
*objfile
,
2072 struct dwarf2_per_cu_data
*per_cu
,
2075 if (!per_cu
->v
.quick
->full_names
)
2076 per_cu
->v
.quick
->full_names
2077 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2078 per_cu
->v
.quick
->lines
->num_file_names
,
2081 if (!per_cu
->v
.quick
->full_names
[index
])
2082 per_cu
->v
.quick
->full_names
[index
]
2083 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2085 return per_cu
->v
.quick
->full_names
[index
];
2088 static struct symtab
*
2089 dw2_find_last_source_symtab (struct objfile
*objfile
)
2092 dw2_setup (objfile
);
2093 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2094 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2098 dw2_forget_cached_source_info (struct objfile
*objfile
)
2102 dw2_setup (objfile
);
2103 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2104 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2106 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2108 if (per_cu
->v
.quick
->full_names
)
2112 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2113 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2119 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2120 const char *full_path
, const char *real_path
,
2121 struct symtab
**result
)
2124 int check_basename
= lbasename (name
) == name
;
2125 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2127 dw2_setup (objfile
);
2128 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2129 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2132 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2134 if (per_cu
->v
.quick
->symtab
)
2137 dw2_require_line_header (objfile
, per_cu
);
2138 if (!per_cu
->v
.quick
->lines
)
2141 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2143 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2145 if (FILENAME_CMP (name
, this_name
) == 0)
2147 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2151 if (check_basename
&& ! base_cu
2152 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2155 if (full_path
!= NULL
)
2157 const char *this_full_name
= dw2_require_full_path (objfile
,
2161 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2163 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2168 if (real_path
!= NULL
)
2170 const char *this_full_name
= dw2_require_full_path (objfile
,
2173 if (this_full_name
!= NULL
)
2175 char *rp
= gdb_realpath (this_full_name
);
2176 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
2179 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2190 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2197 static struct symtab
*
2198 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2199 const char *name
, domain_enum domain
)
2201 /* We do all the work in the pre_expand_symtabs_matching hook
2206 /* A helper function that expands all symtabs that hold an object
2209 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2211 dw2_setup (objfile
);
2213 if (dwarf2_per_objfile
->index_table
)
2217 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2220 offset_type i
, len
= MAYBE_SWAP (*vec
);
2221 for (i
= 0; i
< len
; ++i
)
2223 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2224 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2226 dw2_instantiate_symtab (objfile
, per_cu
);
2233 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2234 int kind
, const char *name
,
2237 dw2_do_expand_symtabs_matching (objfile
, name
);
2241 dw2_print_stats (struct objfile
*objfile
)
2245 dw2_setup (objfile
);
2247 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2248 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2250 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2252 if (!per_cu
->v
.quick
->symtab
)
2255 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2259 dw2_dump (struct objfile
*objfile
)
2261 /* Nothing worth printing. */
2265 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2266 struct section_offsets
*delta
)
2268 /* There's nothing to relocate here. */
2272 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2273 const char *func_name
)
2275 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2279 dw2_expand_all_symtabs (struct objfile
*objfile
)
2283 dw2_setup (objfile
);
2285 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2286 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2288 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2290 dw2_instantiate_symtab (objfile
, per_cu
);
2295 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2296 const char *filename
)
2300 dw2_setup (objfile
);
2301 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2302 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2305 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2307 if (per_cu
->v
.quick
->symtab
)
2310 dw2_require_line_header (objfile
, per_cu
);
2311 if (!per_cu
->v
.quick
->lines
)
2314 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2316 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2317 if (strcmp (this_name
, filename
) == 0)
2319 dw2_instantiate_symtab (objfile
, per_cu
);
2327 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2329 struct dwarf2_per_cu_data
*per_cu
;
2332 dw2_setup (objfile
);
2334 if (!dwarf2_per_objfile
->index_table
)
2337 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2341 /* Note that this just looks at the very first one named NAME -- but
2342 actually we are looking for a function. find_main_filename
2343 should be rewritten so that it doesn't require a custom hook. It
2344 could just use the ordinary symbol tables. */
2345 /* vec[0] is the length, which must always be >0. */
2346 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2348 dw2_require_line_header (objfile
, per_cu
);
2349 if (!per_cu
->v
.quick
->lines
)
2352 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2356 dw2_map_ada_symtabs (struct objfile
*objfile
,
2357 int (*wild_match
) (const char *, int, const char *),
2358 int (*is_name_suffix
) (const char *),
2359 void (*callback
) (struct objfile
*,
2360 struct symtab
*, void *),
2361 const char *name
, int global
,
2362 domain_enum
namespace, int wild
,
2365 /* For now, we don't support Ada, so this function can't be
2367 internal_error (__FILE__
, __LINE__
,
2368 _("map_ada_symtabs called via index method"));
2372 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2373 int (*file_matcher
) (const char *, void *),
2374 int (*name_matcher
) (const char *, void *),
2381 dw2_setup (objfile
);
2382 if (!dwarf2_per_objfile
->index_table
)
2385 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2386 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2389 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2391 per_cu
->v
.quick
->mark
= 0;
2392 if (per_cu
->v
.quick
->symtab
)
2395 dw2_require_line_header (objfile
, per_cu
);
2396 if (!per_cu
->v
.quick
->lines
)
2399 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2401 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2403 per_cu
->v
.quick
->mark
= 1;
2410 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2413 offset_type idx
= 2 * iter
;
2415 offset_type
*vec
, vec_len
, vec_idx
;
2417 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2418 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2421 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2422 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2424 if (! (*name_matcher
) (name
, data
))
2427 /* The name was matched, now expand corresponding CUs that were
2429 vec
= (offset_type
*) (dwarf2_per_objfile
->index_table
->constant_pool
2430 + dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1]);
2431 vec_len
= MAYBE_SWAP (vec
[0]);
2432 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2434 struct dwarf2_per_cu_data
*per_cu
;
2436 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2437 if (per_cu
->v
.quick
->mark
)
2438 dw2_instantiate_symtab (objfile
, per_cu
);
2443 static struct symtab
*
2444 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2445 struct minimal_symbol
*msymbol
,
2447 struct obj_section
*section
,
2450 struct dwarf2_per_cu_data
*data
;
2452 dw2_setup (objfile
);
2454 if (!objfile
->psymtabs_addrmap
)
2457 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2461 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2462 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2463 paddress (get_objfile_arch (objfile
), pc
));
2465 return dw2_instantiate_symtab (objfile
, data
);
2469 dw2_map_symbol_names (struct objfile
*objfile
,
2470 void (*fun
) (const char *, void *),
2474 dw2_setup (objfile
);
2476 if (!dwarf2_per_objfile
->index_table
)
2480 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2483 offset_type idx
= 2 * iter
;
2485 offset_type
*vec
, vec_len
, vec_idx
;
2487 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2488 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2491 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2492 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2494 (*fun
) (name
, data
);
2499 dw2_map_symbol_filenames (struct objfile
*objfile
,
2500 void (*fun
) (const char *, const char *, void *),
2505 dw2_setup (objfile
);
2506 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2507 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2510 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2512 if (per_cu
->v
.quick
->symtab
)
2515 dw2_require_line_header (objfile
, per_cu
);
2516 if (!per_cu
->v
.quick
->lines
)
2519 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2521 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2523 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2529 dw2_has_symbols (struct objfile
*objfile
)
2534 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2537 dw2_find_last_source_symtab
,
2538 dw2_forget_cached_source_info
,
2541 dw2_pre_expand_symtabs_matching
,
2545 dw2_expand_symtabs_for_function
,
2546 dw2_expand_all_symtabs
,
2547 dw2_expand_symtabs_with_filename
,
2548 dw2_find_symbol_file
,
2549 dw2_map_ada_symtabs
,
2550 dw2_expand_symtabs_matching
,
2551 dw2_find_pc_sect_symtab
,
2552 dw2_map_symbol_names
,
2553 dw2_map_symbol_filenames
2556 /* Initialize for reading DWARF for this objfile. Return 0 if this
2557 file will use psymtabs, or 1 if using the GNU index. */
2560 dwarf2_initialize_objfile (struct objfile
*objfile
)
2562 /* If we're about to read full symbols, don't bother with the
2563 indices. In this case we also don't care if some other debug
2564 format is making psymtabs, because they are all about to be
2566 if ((objfile
->flags
& OBJF_READNOW
))
2570 dwarf2_per_objfile
->using_index
= 1;
2571 create_all_comp_units (objfile
);
2572 create_debug_types_hash_table (objfile
);
2574 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2575 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2577 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2579 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2580 struct dwarf2_per_cu_quick_data
);
2583 /* Return 1 so that gdb sees the "quick" functions. However,
2584 these functions will be no-ops because we will have expanded
2589 if (dwarf2_read_index (objfile
))
2592 dwarf2_build_psymtabs (objfile
);
2598 /* Build a partial symbol table. */
2601 dwarf2_build_psymtabs (struct objfile
*objfile
)
2603 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2605 init_psymbol_list (objfile
, 1024);
2608 dwarf2_build_psymtabs_hard (objfile
);
2611 /* Return TRUE if OFFSET is within CU_HEADER. */
2614 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2616 unsigned int bottom
= cu_header
->offset
;
2617 unsigned int top
= (cu_header
->offset
2619 + cu_header
->initial_length_size
);
2621 return (offset
>= bottom
&& offset
< top
);
2624 /* Read in the comp unit header information from the debug_info at info_ptr.
2625 NOTE: This leaves members offset, first_die_offset to be filled in
2629 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2630 gdb_byte
*info_ptr
, bfd
*abfd
)
2633 unsigned int bytes_read
;
2635 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2636 cu_header
->initial_length_size
= bytes_read
;
2637 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2638 info_ptr
+= bytes_read
;
2639 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2641 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2643 info_ptr
+= bytes_read
;
2644 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2646 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2647 if (signed_addr
< 0)
2648 internal_error (__FILE__
, __LINE__
,
2649 _("read_comp_unit_head: dwarf from non elf file"));
2650 cu_header
->signed_addr_p
= signed_addr
;
2656 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2657 gdb_byte
*buffer
, unsigned int buffer_size
,
2660 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2662 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2664 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2665 error (_("Dwarf Error: wrong version in compilation unit header "
2666 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2667 bfd_get_filename (abfd
));
2669 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2670 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2671 "(offset 0x%lx + 6) [in module %s]"),
2672 (long) header
->abbrev_offset
,
2673 (long) (beg_of_comp_unit
- buffer
),
2674 bfd_get_filename (abfd
));
2676 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2677 > buffer
+ buffer_size
)
2678 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2679 "(offset 0x%lx + 0) [in module %s]"),
2680 (long) header
->length
,
2681 (long) (beg_of_comp_unit
- buffer
),
2682 bfd_get_filename (abfd
));
2687 /* Read in the types comp unit header information from .debug_types entry at
2688 types_ptr. The result is a pointer to one past the end of the header. */
2691 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2692 ULONGEST
*signature
,
2693 gdb_byte
*types_ptr
, bfd
*abfd
)
2695 gdb_byte
*initial_types_ptr
= types_ptr
;
2697 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2698 &dwarf2_per_objfile
->types
);
2699 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2701 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2703 *signature
= read_8_bytes (abfd
, types_ptr
);
2705 types_ptr
+= cu_header
->offset_size
;
2706 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2711 /* Allocate a new partial symtab for file named NAME and mark this new
2712 partial symtab as being an include of PST. */
2715 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2716 struct objfile
*objfile
)
2718 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2720 subpst
->section_offsets
= pst
->section_offsets
;
2721 subpst
->textlow
= 0;
2722 subpst
->texthigh
= 0;
2724 subpst
->dependencies
= (struct partial_symtab
**)
2725 obstack_alloc (&objfile
->objfile_obstack
,
2726 sizeof (struct partial_symtab
*));
2727 subpst
->dependencies
[0] = pst
;
2728 subpst
->number_of_dependencies
= 1;
2730 subpst
->globals_offset
= 0;
2731 subpst
->n_global_syms
= 0;
2732 subpst
->statics_offset
= 0;
2733 subpst
->n_static_syms
= 0;
2734 subpst
->symtab
= NULL
;
2735 subpst
->read_symtab
= pst
->read_symtab
;
2738 /* No private part is necessary for include psymtabs. This property
2739 can be used to differentiate between such include psymtabs and
2740 the regular ones. */
2741 subpst
->read_symtab_private
= NULL
;
2744 /* Read the Line Number Program data and extract the list of files
2745 included by the source file represented by PST. Build an include
2746 partial symtab for each of these included files. */
2749 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2750 struct die_info
*die
,
2751 struct partial_symtab
*pst
)
2753 struct objfile
*objfile
= cu
->objfile
;
2754 bfd
*abfd
= objfile
->obfd
;
2755 struct line_header
*lh
= NULL
;
2756 struct attribute
*attr
;
2758 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2761 unsigned int line_offset
= DW_UNSND (attr
);
2763 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2766 return; /* No linetable, so no includes. */
2768 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2769 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2771 free_line_header (lh
);
2775 hash_type_signature (const void *item
)
2777 const struct signatured_type
*type_sig
= item
;
2779 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2780 return type_sig
->signature
;
2784 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2786 const struct signatured_type
*lhs
= item_lhs
;
2787 const struct signatured_type
*rhs
= item_rhs
;
2789 return lhs
->signature
== rhs
->signature
;
2792 /* Allocate a hash table for signatured types. */
2795 allocate_signatured_type_table (struct objfile
*objfile
)
2797 return htab_create_alloc_ex (41,
2798 hash_type_signature
,
2801 &objfile
->objfile_obstack
,
2802 hashtab_obstack_allocate
,
2803 dummy_obstack_deallocate
);
2806 /* A helper function to add a signatured type CU to a list. */
2809 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2811 struct signatured_type
*sigt
= *slot
;
2812 struct dwarf2_per_cu_data
***datap
= datum
;
2814 **datap
= &sigt
->per_cu
;
2820 /* Create the hash table of all entries in the .debug_types section.
2821 The result is zero if there is an error (e.g. missing .debug_types section),
2822 otherwise non-zero. */
2825 create_debug_types_hash_table (struct objfile
*objfile
)
2829 struct dwarf2_per_cu_data
**iter
;
2831 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2832 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2834 if (info_ptr
== NULL
)
2836 dwarf2_per_objfile
->signatured_types
= NULL
;
2840 types_htab
= allocate_signatured_type_table (objfile
);
2842 if (dwarf2_die_debug
)
2843 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2845 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2847 unsigned int offset
;
2848 unsigned int offset_size
;
2849 unsigned int type_offset
;
2850 unsigned int length
, initial_length_size
;
2851 unsigned short version
;
2853 struct signatured_type
*type_sig
;
2855 gdb_byte
*ptr
= info_ptr
;
2857 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2859 /* We need to read the type's signature in order to build the hash
2860 table, but we don't need to read anything else just yet. */
2862 /* Sanity check to ensure entire cu is present. */
2863 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2864 if (ptr
+ length
+ initial_length_size
2865 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2867 complaint (&symfile_complaints
,
2868 _("debug type entry runs off end of `.debug_types' section, ignored"));
2872 offset_size
= initial_length_size
== 4 ? 4 : 8;
2873 ptr
+= initial_length_size
;
2874 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2876 ptr
+= offset_size
; /* abbrev offset */
2877 ptr
+= 1; /* address size */
2878 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2880 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2882 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2883 memset (type_sig
, 0, sizeof (*type_sig
));
2884 type_sig
->signature
= signature
;
2885 type_sig
->offset
= offset
;
2886 type_sig
->type_offset
= type_offset
;
2887 type_sig
->per_cu
.objfile
= objfile
;
2888 type_sig
->per_cu
.from_debug_types
= 1;
2890 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2891 gdb_assert (slot
!= NULL
);
2894 if (dwarf2_die_debug
)
2895 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2896 offset
, phex (signature
, sizeof (signature
)));
2898 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2901 dwarf2_per_objfile
->signatured_types
= types_htab
;
2903 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2904 dwarf2_per_objfile
->type_comp_units
2905 = obstack_alloc (&objfile
->objfile_obstack
,
2906 dwarf2_per_objfile
->n_type_comp_units
2907 * sizeof (struct dwarf2_per_cu_data
*));
2908 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2909 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2910 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2911 == dwarf2_per_objfile
->n_type_comp_units
);
2916 /* Lookup a signature based type.
2917 Returns NULL if SIG is not present in the table. */
2919 static struct signatured_type
*
2920 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2922 struct signatured_type find_entry
, *entry
;
2924 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2926 complaint (&symfile_complaints
,
2927 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2931 find_entry
.signature
= sig
;
2932 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2936 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2939 init_cu_die_reader (struct die_reader_specs
*reader
,
2940 struct dwarf2_cu
*cu
)
2942 reader
->abfd
= cu
->objfile
->obfd
;
2944 if (cu
->per_cu
->from_debug_types
)
2946 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2947 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2951 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2952 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2956 /* Find the base address of the compilation unit for range lists and
2957 location lists. It will normally be specified by DW_AT_low_pc.
2958 In DWARF-3 draft 4, the base address could be overridden by
2959 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2960 compilation units with discontinuous ranges. */
2963 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2965 struct attribute
*attr
;
2968 cu
->base_address
= 0;
2970 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
2973 cu
->base_address
= DW_ADDR (attr
);
2978 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
2981 cu
->base_address
= DW_ADDR (attr
);
2987 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2988 to combine the common parts.
2989 Process a compilation unit for a psymtab.
2990 BUFFER is a pointer to the beginning of the dwarf section buffer,
2991 either .debug_info or debug_types.
2992 INFO_PTR is a pointer to the start of the CU.
2993 Returns a pointer to the next CU. */
2996 process_psymtab_comp_unit (struct objfile
*objfile
,
2997 struct dwarf2_per_cu_data
*this_cu
,
2998 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2999 unsigned int buffer_size
)
3001 bfd
*abfd
= objfile
->obfd
;
3002 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3003 struct die_info
*comp_unit_die
;
3004 struct partial_symtab
*pst
;
3006 struct cleanup
*back_to_inner
;
3007 struct dwarf2_cu cu
;
3008 int has_children
, has_pc_info
;
3009 struct attribute
*attr
;
3010 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3011 struct die_reader_specs reader_specs
;
3013 memset (&cu
, 0, sizeof (cu
));
3014 cu
.objfile
= objfile
;
3015 obstack_init (&cu
.comp_unit_obstack
);
3017 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3019 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3020 buffer
, buffer_size
,
3023 /* Complete the cu_header. */
3024 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3025 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3027 cu
.list_in_scope
= &file_symbols
;
3029 /* If this compilation unit was already read in, free the
3030 cached copy in order to read it in again. This is
3031 necessary because we skipped some symbols when we first
3032 read in the compilation unit (see load_partial_dies).
3033 This problem could be avoided, but the benefit is
3035 if (this_cu
->cu
!= NULL
)
3036 free_one_cached_comp_unit (this_cu
->cu
);
3038 /* Note that this is a pointer to our stack frame, being
3039 added to a global data structure. It will be cleaned up
3040 in free_stack_comp_unit when we finish with this
3041 compilation unit. */
3043 cu
.per_cu
= this_cu
;
3045 /* Read the abbrevs for this compilation unit into a table. */
3046 dwarf2_read_abbrevs (abfd
, &cu
);
3047 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3049 /* Read the compilation unit die. */
3050 if (this_cu
->from_debug_types
)
3051 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3052 init_cu_die_reader (&reader_specs
, &cu
);
3053 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3056 if (this_cu
->from_debug_types
)
3058 /* offset,length haven't been set yet for type units. */
3059 this_cu
->offset
= cu
.header
.offset
;
3060 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3062 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3064 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3065 + cu
.header
.initial_length_size
);
3066 do_cleanups (back_to_inner
);
3070 /* Set the language we're debugging. */
3071 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
3073 set_cu_language (DW_UNSND (attr
), &cu
);
3075 set_cu_language (language_minimal
, &cu
);
3077 /* Allocate a new partial symbol table structure. */
3078 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3079 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3080 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3081 /* TEXTLOW and TEXTHIGH are set below. */
3083 objfile
->global_psymbols
.next
,
3084 objfile
->static_psymbols
.next
);
3086 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3088 pst
->dirname
= DW_STRING (attr
);
3090 pst
->read_symtab_private
= this_cu
;
3092 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3094 /* Store the function that reads in the rest of the symbol table */
3095 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3097 this_cu
->v
.psymtab
= pst
;
3099 dwarf2_find_base_address (comp_unit_die
, &cu
);
3101 /* Possibly set the default values of LOWPC and HIGHPC from
3103 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3104 &best_highpc
, &cu
, pst
);
3105 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3106 /* Store the contiguous range if it is not empty; it can be empty for
3107 CUs with no code. */
3108 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3109 best_lowpc
+ baseaddr
,
3110 best_highpc
+ baseaddr
- 1, pst
);
3112 /* Check if comp unit has_children.
3113 If so, read the rest of the partial symbols from this comp unit.
3114 If not, there's no more debug_info for this comp unit. */
3117 struct partial_die_info
*first_die
;
3118 CORE_ADDR lowpc
, highpc
;
3120 lowpc
= ((CORE_ADDR
) -1);
3121 highpc
= ((CORE_ADDR
) 0);
3123 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3125 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3126 ! has_pc_info
, &cu
);
3128 /* If we didn't find a lowpc, set it to highpc to avoid
3129 complaints from `maint check'. */
3130 if (lowpc
== ((CORE_ADDR
) -1))
3133 /* If the compilation unit didn't have an explicit address range,
3134 then use the information extracted from its child dies. */
3138 best_highpc
= highpc
;
3141 pst
->textlow
= best_lowpc
+ baseaddr
;
3142 pst
->texthigh
= best_highpc
+ baseaddr
;
3144 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3145 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3146 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3147 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3148 sort_pst_symbols (pst
);
3150 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3151 + cu
.header
.initial_length_size
);
3153 if (this_cu
->from_debug_types
)
3155 /* It's not clear we want to do anything with stmt lists here.
3156 Waiting to see what gcc ultimately does. */
3160 /* Get the list of files included in the current compilation unit,
3161 and build a psymtab for each of them. */
3162 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3165 do_cleanups (back_to_inner
);
3170 /* Traversal function for htab_traverse_noresize.
3171 Process one .debug_types comp-unit. */
3174 process_type_comp_unit (void **slot
, void *info
)
3176 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3177 struct objfile
*objfile
= (struct objfile
*) info
;
3178 struct dwarf2_per_cu_data
*this_cu
;
3180 this_cu
= &entry
->per_cu
;
3182 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3183 process_psymtab_comp_unit (objfile
, this_cu
,
3184 dwarf2_per_objfile
->types
.buffer
,
3185 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3186 dwarf2_per_objfile
->types
.size
);
3191 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3192 Build partial symbol tables for the .debug_types comp-units. */
3195 build_type_psymtabs (struct objfile
*objfile
)
3197 if (! create_debug_types_hash_table (objfile
))
3200 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3201 process_type_comp_unit
, objfile
);
3204 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3207 psymtabs_addrmap_cleanup (void *o
)
3209 struct objfile
*objfile
= o
;
3211 objfile
->psymtabs_addrmap
= NULL
;
3214 /* Build the partial symbol table by doing a quick pass through the
3215 .debug_info and .debug_abbrev sections. */
3218 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3221 struct cleanup
*back_to
, *addrmap_cleanup
;
3222 struct obstack temp_obstack
;
3224 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3226 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3227 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3229 /* Any cached compilation units will be linked by the per-objfile
3230 read_in_chain. Make sure to free them when we're done. */
3231 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3233 build_type_psymtabs (objfile
);
3235 create_all_comp_units (objfile
);
3237 /* Create a temporary address map on a temporary obstack. We later
3238 copy this to the final obstack. */
3239 obstack_init (&temp_obstack
);
3240 make_cleanup_obstack_free (&temp_obstack
);
3241 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3242 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3244 /* Since the objects we're extracting from .debug_info vary in
3245 length, only the individual functions to extract them (like
3246 read_comp_unit_head and load_partial_die) can really know whether
3247 the buffer is large enough to hold another complete object.
3249 At the moment, they don't actually check that. If .debug_info
3250 holds just one extra byte after the last compilation unit's dies,
3251 then read_comp_unit_head will happily read off the end of the
3252 buffer. read_partial_die is similarly casual. Those functions
3255 For this loop condition, simply checking whether there's any data
3256 left at all should be sufficient. */
3258 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3259 + dwarf2_per_objfile
->info
.size
))
3261 struct dwarf2_per_cu_data
*this_cu
;
3263 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3266 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3267 dwarf2_per_objfile
->info
.buffer
,
3269 dwarf2_per_objfile
->info
.size
);
3272 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3273 &objfile
->objfile_obstack
);
3274 discard_cleanups (addrmap_cleanup
);
3276 do_cleanups (back_to
);
3279 /* Load the partial DIEs for a secondary CU into memory. */
3282 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3283 struct objfile
*objfile
)
3285 bfd
*abfd
= objfile
->obfd
;
3286 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3287 struct die_info
*comp_unit_die
;
3288 struct dwarf2_cu
*cu
;
3289 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3290 struct attribute
*attr
;
3292 struct die_reader_specs reader_specs
;
3295 gdb_assert (! this_cu
->from_debug_types
);
3297 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3298 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3299 beg_of_comp_unit
= info_ptr
;
3301 if (this_cu
->cu
== NULL
)
3303 cu
= alloc_one_comp_unit (objfile
);
3307 /* If an error occurs while loading, release our storage. */
3308 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3310 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3311 dwarf2_per_objfile
->info
.buffer
,
3312 dwarf2_per_objfile
->info
.size
,
3315 /* Complete the cu_header. */
3316 cu
->header
.offset
= this_cu
->offset
;
3317 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3319 /* Link this compilation unit into the compilation unit tree. */
3321 cu
->per_cu
= this_cu
;
3323 /* Link this CU into read_in_chain. */
3324 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3325 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3330 info_ptr
+= cu
->header
.first_die_offset
;
3333 /* Read the abbrevs for this compilation unit into a table. */
3334 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3335 dwarf2_read_abbrevs (abfd
, cu
);
3336 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3338 /* Read the compilation unit die. */
3339 init_cu_die_reader (&reader_specs
, cu
);
3340 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3343 /* Set the language we're debugging. */
3344 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
3346 set_cu_language (DW_UNSND (attr
), cu
);
3348 set_cu_language (language_minimal
, cu
);
3350 /* Check if comp unit has_children.
3351 If so, read the rest of the partial symbols from this comp unit.
3352 If not, there's no more debug_info for this comp unit. */
3354 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3356 do_cleanups (free_abbrevs_cleanup
);
3360 /* We've successfully allocated this compilation unit. Let our
3361 caller clean it up when finished with it. */
3362 discard_cleanups (free_cu_cleanup
);
3366 /* Create a list of all compilation units in OBJFILE. We do this only
3367 if an inter-comp-unit reference is found; presumably if there is one,
3368 there will be many, and one will occur early in the .debug_info section.
3369 So there's no point in building this list incrementally. */
3372 create_all_comp_units (struct objfile
*objfile
)
3376 struct dwarf2_per_cu_data
**all_comp_units
;
3379 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3380 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3384 all_comp_units
= xmalloc (n_allocated
3385 * sizeof (struct dwarf2_per_cu_data
*));
3387 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3389 unsigned int length
, initial_length_size
;
3390 struct dwarf2_per_cu_data
*this_cu
;
3391 unsigned int offset
;
3393 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3395 /* Read just enough information to find out where the next
3396 compilation unit is. */
3397 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3398 &initial_length_size
);
3400 /* Save the compilation unit for later lookup. */
3401 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3402 sizeof (struct dwarf2_per_cu_data
));
3403 memset (this_cu
, 0, sizeof (*this_cu
));
3404 this_cu
->offset
= offset
;
3405 this_cu
->length
= length
+ initial_length_size
;
3406 this_cu
->objfile
= objfile
;
3408 if (n_comp_units
== n_allocated
)
3411 all_comp_units
= xrealloc (all_comp_units
,
3413 * sizeof (struct dwarf2_per_cu_data
*));
3415 all_comp_units
[n_comp_units
++] = this_cu
;
3417 info_ptr
= info_ptr
+ this_cu
->length
;
3420 dwarf2_per_objfile
->all_comp_units
3421 = obstack_alloc (&objfile
->objfile_obstack
,
3422 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3423 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3424 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3425 xfree (all_comp_units
);
3426 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3429 /* Process all loaded DIEs for compilation unit CU, starting at
3430 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3431 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3432 DW_AT_ranges). If NEED_PC is set, then this function will set
3433 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3434 and record the covered ranges in the addrmap. */
3437 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3438 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3440 struct partial_die_info
*pdi
;
3442 /* Now, march along the PDI's, descending into ones which have
3443 interesting children but skipping the children of the other ones,
3444 until we reach the end of the compilation unit. */
3450 fixup_partial_die (pdi
, cu
);
3452 /* Anonymous namespaces or modules have no name but have interesting
3453 children, so we need to look at them. Ditto for anonymous
3456 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3457 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3461 case DW_TAG_subprogram
:
3462 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3464 case DW_TAG_variable
:
3465 case DW_TAG_typedef
:
3466 case DW_TAG_union_type
:
3467 if (!pdi
->is_declaration
)
3469 add_partial_symbol (pdi
, cu
);
3472 case DW_TAG_class_type
:
3473 case DW_TAG_interface_type
:
3474 case DW_TAG_structure_type
:
3475 if (!pdi
->is_declaration
)
3477 add_partial_symbol (pdi
, cu
);
3480 case DW_TAG_enumeration_type
:
3481 if (!pdi
->is_declaration
)
3482 add_partial_enumeration (pdi
, cu
);
3484 case DW_TAG_base_type
:
3485 case DW_TAG_subrange_type
:
3486 /* File scope base type definitions are added to the partial
3488 add_partial_symbol (pdi
, cu
);
3490 case DW_TAG_namespace
:
3491 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3494 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3501 /* If the die has a sibling, skip to the sibling. */
3503 pdi
= pdi
->die_sibling
;
3507 /* Functions used to compute the fully scoped name of a partial DIE.
3509 Normally, this is simple. For C++, the parent DIE's fully scoped
3510 name is concatenated with "::" and the partial DIE's name. For
3511 Java, the same thing occurs except that "." is used instead of "::".
3512 Enumerators are an exception; they use the scope of their parent
3513 enumeration type, i.e. the name of the enumeration type is not
3514 prepended to the enumerator.
3516 There are two complexities. One is DW_AT_specification; in this
3517 case "parent" means the parent of the target of the specification,
3518 instead of the direct parent of the DIE. The other is compilers
3519 which do not emit DW_TAG_namespace; in this case we try to guess
3520 the fully qualified name of structure types from their members'
3521 linkage names. This must be done using the DIE's children rather
3522 than the children of any DW_AT_specification target. We only need
3523 to do this for structures at the top level, i.e. if the target of
3524 any DW_AT_specification (if any; otherwise the DIE itself) does not
3527 /* Compute the scope prefix associated with PDI's parent, in
3528 compilation unit CU. The result will be allocated on CU's
3529 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3530 field. NULL is returned if no prefix is necessary. */
3532 partial_die_parent_scope (struct partial_die_info
*pdi
,
3533 struct dwarf2_cu
*cu
)
3535 char *grandparent_scope
;
3536 struct partial_die_info
*parent
, *real_pdi
;
3538 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3539 then this means the parent of the specification DIE. */
3542 while (real_pdi
->has_specification
)
3543 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3545 parent
= real_pdi
->die_parent
;
3549 if (parent
->scope_set
)
3550 return parent
->scope
;
3552 fixup_partial_die (parent
, cu
);
3554 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3556 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3557 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3558 Work around this problem here. */
3559 if (cu
->language
== language_cplus
3560 && parent
->tag
== DW_TAG_namespace
3561 && strcmp (parent
->name
, "::") == 0
3562 && grandparent_scope
== NULL
)
3564 parent
->scope
= NULL
;
3565 parent
->scope_set
= 1;
3569 if (parent
->tag
== DW_TAG_namespace
3570 || parent
->tag
== DW_TAG_module
3571 || parent
->tag
== DW_TAG_structure_type
3572 || parent
->tag
== DW_TAG_class_type
3573 || parent
->tag
== DW_TAG_interface_type
3574 || parent
->tag
== DW_TAG_union_type
3575 || parent
->tag
== DW_TAG_enumeration_type
)
3577 if (grandparent_scope
== NULL
)
3578 parent
->scope
= parent
->name
;
3580 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3581 parent
->name
, 0, cu
);
3583 else if (parent
->tag
== DW_TAG_enumerator
)
3584 /* Enumerators should not get the name of the enumeration as a prefix. */
3585 parent
->scope
= grandparent_scope
;
3588 /* FIXME drow/2004-04-01: What should we be doing with
3589 function-local names? For partial symbols, we should probably be
3591 complaint (&symfile_complaints
,
3592 _("unhandled containing DIE tag %d for DIE at %d"),
3593 parent
->tag
, pdi
->offset
);
3594 parent
->scope
= grandparent_scope
;
3597 parent
->scope_set
= 1;
3598 return parent
->scope
;
3601 /* Return the fully scoped name associated with PDI, from compilation unit
3602 CU. The result will be allocated with malloc. */
3604 partial_die_full_name (struct partial_die_info
*pdi
,
3605 struct dwarf2_cu
*cu
)
3609 /* If this is a template instantiation, we can not work out the
3610 template arguments from partial DIEs. So, unfortunately, we have
3611 to go through the full DIEs. At least any work we do building
3612 types here will be reused if full symbols are loaded later. */
3613 if (pdi
->has_template_arguments
)
3615 fixup_partial_die (pdi
, cu
);
3617 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3619 struct die_info
*die
;
3620 struct attribute attr
;
3621 struct dwarf2_cu
*ref_cu
= cu
;
3624 attr
.form
= DW_FORM_ref_addr
;
3625 attr
.u
.addr
= pdi
->offset
;
3626 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3628 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3632 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3633 if (parent_scope
== NULL
)
3636 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3640 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3642 struct objfile
*objfile
= cu
->objfile
;
3644 char *actual_name
= NULL
;
3645 const struct partial_symbol
*psym
= NULL
;
3647 int built_actual_name
= 0;
3649 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3651 actual_name
= partial_die_full_name (pdi
, cu
);
3653 built_actual_name
= 1;
3655 if (actual_name
== NULL
)
3656 actual_name
= pdi
->name
;
3660 case DW_TAG_subprogram
:
3661 if (pdi
->is_external
|| cu
->language
== language_ada
)
3663 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3664 of the global scope. But in Ada, we want to be able to access
3665 nested procedures globally. So all Ada subprograms are stored
3666 in the global scope. */
3667 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3668 mst_text, objfile); */
3669 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3671 VAR_DOMAIN
, LOC_BLOCK
,
3672 &objfile
->global_psymbols
,
3673 0, pdi
->lowpc
+ baseaddr
,
3674 cu
->language
, objfile
);
3678 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3679 mst_file_text, objfile); */
3680 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3682 VAR_DOMAIN
, LOC_BLOCK
,
3683 &objfile
->static_psymbols
,
3684 0, pdi
->lowpc
+ baseaddr
,
3685 cu
->language
, objfile
);
3688 case DW_TAG_variable
:
3690 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3694 && !dwarf2_per_objfile
->has_section_at_zero
)
3696 /* A global or static variable may also have been stripped
3697 out by the linker if unused, in which case its address
3698 will be nullified; do not add such variables into partial
3699 symbol table then. */
3701 else if (pdi
->is_external
)
3704 Don't enter into the minimal symbol tables as there is
3705 a minimal symbol table entry from the ELF symbols already.
3706 Enter into partial symbol table if it has a location
3707 descriptor or a type.
3708 If the location descriptor is missing, new_symbol will create
3709 a LOC_UNRESOLVED symbol, the address of the variable will then
3710 be determined from the minimal symbol table whenever the variable
3712 The address for the partial symbol table entry is not
3713 used by GDB, but it comes in handy for debugging partial symbol
3716 if (pdi
->locdesc
|| pdi
->has_type
)
3717 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3719 VAR_DOMAIN
, LOC_STATIC
,
3720 &objfile
->global_psymbols
,
3722 cu
->language
, objfile
);
3726 /* Static Variable. Skip symbols without location descriptors. */
3727 if (pdi
->locdesc
== NULL
)
3729 if (built_actual_name
)
3730 xfree (actual_name
);
3733 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3734 mst_file_data, objfile); */
3735 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3737 VAR_DOMAIN
, LOC_STATIC
,
3738 &objfile
->static_psymbols
,
3740 cu
->language
, objfile
);
3743 case DW_TAG_typedef
:
3744 case DW_TAG_base_type
:
3745 case DW_TAG_subrange_type
:
3746 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3748 VAR_DOMAIN
, LOC_TYPEDEF
,
3749 &objfile
->static_psymbols
,
3750 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3752 case DW_TAG_namespace
:
3753 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3755 VAR_DOMAIN
, LOC_TYPEDEF
,
3756 &objfile
->global_psymbols
,
3757 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3759 case DW_TAG_class_type
:
3760 case DW_TAG_interface_type
:
3761 case DW_TAG_structure_type
:
3762 case DW_TAG_union_type
:
3763 case DW_TAG_enumeration_type
:
3764 /* Skip external references. The DWARF standard says in the section
3765 about "Structure, Union, and Class Type Entries": "An incomplete
3766 structure, union or class type is represented by a structure,
3767 union or class entry that does not have a byte size attribute
3768 and that has a DW_AT_declaration attribute." */
3769 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3771 if (built_actual_name
)
3772 xfree (actual_name
);
3776 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3777 static vs. global. */
3778 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3780 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3781 (cu
->language
== language_cplus
3782 || cu
->language
== language_java
)
3783 ? &objfile
->global_psymbols
3784 : &objfile
->static_psymbols
,
3785 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3788 case DW_TAG_enumerator
:
3789 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3791 VAR_DOMAIN
, LOC_CONST
,
3792 (cu
->language
== language_cplus
3793 || cu
->language
== language_java
)
3794 ? &objfile
->global_psymbols
3795 : &objfile
->static_psymbols
,
3796 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3802 if (built_actual_name
)
3803 xfree (actual_name
);
3806 /* Read a partial die corresponding to a namespace; also, add a symbol
3807 corresponding to that namespace to the symbol table. NAMESPACE is
3808 the name of the enclosing namespace. */
3811 add_partial_namespace (struct partial_die_info
*pdi
,
3812 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3813 int need_pc
, struct dwarf2_cu
*cu
)
3815 /* Add a symbol for the namespace. */
3817 add_partial_symbol (pdi
, cu
);
3819 /* Now scan partial symbols in that namespace. */
3821 if (pdi
->has_children
)
3822 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3825 /* Read a partial die corresponding to a Fortran module. */
3828 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3829 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3831 /* Now scan partial symbols in that module. */
3833 if (pdi
->has_children
)
3834 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3837 /* Read a partial die corresponding to a subprogram and create a partial
3838 symbol for that subprogram. When the CU language allows it, this
3839 routine also defines a partial symbol for each nested subprogram
3840 that this subprogram contains.
3842 DIE my also be a lexical block, in which case we simply search
3843 recursively for suprograms defined inside that lexical block.
3844 Again, this is only performed when the CU language allows this
3845 type of definitions. */
3848 add_partial_subprogram (struct partial_die_info
*pdi
,
3849 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3850 int need_pc
, struct dwarf2_cu
*cu
)
3852 if (pdi
->tag
== DW_TAG_subprogram
)
3854 if (pdi
->has_pc_info
)
3856 if (pdi
->lowpc
< *lowpc
)
3857 *lowpc
= pdi
->lowpc
;
3858 if (pdi
->highpc
> *highpc
)
3859 *highpc
= pdi
->highpc
;
3863 struct objfile
*objfile
= cu
->objfile
;
3865 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3866 SECT_OFF_TEXT (objfile
));
3867 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3868 pdi
->lowpc
+ baseaddr
,
3869 pdi
->highpc
- 1 + baseaddr
,
3870 cu
->per_cu
->v
.psymtab
);
3872 if (!pdi
->is_declaration
)
3873 /* Ignore subprogram DIEs that do not have a name, they are
3874 illegal. Do not emit a complaint at this point, we will
3875 do so when we convert this psymtab into a symtab. */
3877 add_partial_symbol (pdi
, cu
);
3881 if (! pdi
->has_children
)
3884 if (cu
->language
== language_ada
)
3886 pdi
= pdi
->die_child
;
3889 fixup_partial_die (pdi
, cu
);
3890 if (pdi
->tag
== DW_TAG_subprogram
3891 || pdi
->tag
== DW_TAG_lexical_block
)
3892 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3893 pdi
= pdi
->die_sibling
;
3898 /* See if we can figure out if the class lives in a namespace. We do
3899 this by looking for a member function; its demangled name will
3900 contain namespace info, if there is any. */
3903 guess_structure_name (struct partial_die_info
*struct_pdi
,
3904 struct dwarf2_cu
*cu
)
3906 if ((cu
->language
== language_cplus
3907 || cu
->language
== language_java
)
3908 && cu
->has_namespace_info
== 0
3909 && struct_pdi
->has_children
)
3911 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3912 what template types look like, because the demangler
3913 frequently doesn't give the same name as the debug info. We
3914 could fix this by only using the demangled name to get the
3915 prefix (but see comment in read_structure_type). */
3917 struct partial_die_info
*real_pdi
;
3919 /* If this DIE (this DIE's specification, if any) has a parent, then
3920 we should not do this. We'll prepend the parent's fully qualified
3921 name when we create the partial symbol. */
3923 real_pdi
= struct_pdi
;
3924 while (real_pdi
->has_specification
)
3925 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3927 if (real_pdi
->die_parent
!= NULL
)
3932 /* Read a partial die corresponding to an enumeration type. */
3935 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3936 struct dwarf2_cu
*cu
)
3938 struct partial_die_info
*pdi
;
3940 if (enum_pdi
->name
!= NULL
)
3941 add_partial_symbol (enum_pdi
, cu
);
3943 pdi
= enum_pdi
->die_child
;
3946 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3947 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3949 add_partial_symbol (pdi
, cu
);
3950 pdi
= pdi
->die_sibling
;
3954 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3955 Return the corresponding abbrev, or NULL if the number is zero (indicating
3956 an empty DIE). In either case *BYTES_READ will be set to the length of
3957 the initial number. */
3959 static struct abbrev_info
*
3960 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3961 struct dwarf2_cu
*cu
)
3963 bfd
*abfd
= cu
->objfile
->obfd
;
3964 unsigned int abbrev_number
;
3965 struct abbrev_info
*abbrev
;
3967 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
3969 if (abbrev_number
== 0)
3972 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
3975 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
3976 bfd_get_filename (abfd
));
3982 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3983 Returns a pointer to the end of a series of DIEs, terminated by an empty
3984 DIE. Any children of the skipped DIEs will also be skipped. */
3987 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
3989 struct abbrev_info
*abbrev
;
3990 unsigned int bytes_read
;
3994 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
3996 return info_ptr
+ bytes_read
;
3998 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4002 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4003 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4004 abbrev corresponding to that skipped uleb128 should be passed in
4005 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4009 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4010 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4012 unsigned int bytes_read
;
4013 struct attribute attr
;
4014 bfd
*abfd
= cu
->objfile
->obfd
;
4015 unsigned int form
, i
;
4017 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4019 /* The only abbrev we care about is DW_AT_sibling. */
4020 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4022 read_attribute (&attr
, &abbrev
->attrs
[i
],
4023 abfd
, info_ptr
, cu
);
4024 if (attr
.form
== DW_FORM_ref_addr
)
4025 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4027 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4030 /* If it isn't DW_AT_sibling, skip this attribute. */
4031 form
= abbrev
->attrs
[i
].form
;
4035 case DW_FORM_ref_addr
:
4036 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4037 and later it is offset sized. */
4038 if (cu
->header
.version
== 2)
4039 info_ptr
+= cu
->header
.addr_size
;
4041 info_ptr
+= cu
->header
.offset_size
;
4044 info_ptr
+= cu
->header
.addr_size
;
4051 case DW_FORM_flag_present
:
4066 case DW_FORM_string
:
4067 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4068 info_ptr
+= bytes_read
;
4070 case DW_FORM_sec_offset
:
4072 info_ptr
+= cu
->header
.offset_size
;
4074 case DW_FORM_exprloc
:
4076 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4077 info_ptr
+= bytes_read
;
4079 case DW_FORM_block1
:
4080 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4082 case DW_FORM_block2
:
4083 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4085 case DW_FORM_block4
:
4086 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4090 case DW_FORM_ref_udata
:
4091 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4093 case DW_FORM_indirect
:
4094 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4095 info_ptr
+= bytes_read
;
4096 /* We need to continue parsing from here, so just go back to
4098 goto skip_attribute
;
4101 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4102 dwarf_form_name (form
),
4103 bfd_get_filename (abfd
));
4107 if (abbrev
->has_children
)
4108 return skip_children (buffer
, info_ptr
, cu
);
4113 /* Locate ORIG_PDI's sibling.
4114 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4118 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4119 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4120 bfd
*abfd
, struct dwarf2_cu
*cu
)
4122 /* Do we know the sibling already? */
4124 if (orig_pdi
->sibling
)
4125 return orig_pdi
->sibling
;
4127 /* Are there any children to deal with? */
4129 if (!orig_pdi
->has_children
)
4132 /* Skip the children the long way. */
4134 return skip_children (buffer
, info_ptr
, cu
);
4137 /* Expand this partial symbol table into a full symbol table. */
4140 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4146 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4152 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4153 gdb_flush (gdb_stdout
);
4156 /* Restore our global data. */
4157 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4158 dwarf2_objfile_data_key
);
4160 /* If this psymtab is constructed from a debug-only objfile, the
4161 has_section_at_zero flag will not necessarily be correct. We
4162 can get the correct value for this flag by looking at the data
4163 associated with the (presumably stripped) associated objfile. */
4164 if (pst
->objfile
->separate_debug_objfile_backlink
)
4166 struct dwarf2_per_objfile
*dpo_backlink
4167 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4168 dwarf2_objfile_data_key
);
4170 dwarf2_per_objfile
->has_section_at_zero
4171 = dpo_backlink
->has_section_at_zero
;
4174 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4176 psymtab_to_symtab_1 (pst
);
4178 /* Finish up the debug error message. */
4180 printf_filtered (_("done.\n"));
4185 /* Add PER_CU to the queue. */
4188 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4190 struct dwarf2_queue_item
*item
;
4193 item
= xmalloc (sizeof (*item
));
4194 item
->per_cu
= per_cu
;
4197 if (dwarf2_queue
== NULL
)
4198 dwarf2_queue
= item
;
4200 dwarf2_queue_tail
->next
= item
;
4202 dwarf2_queue_tail
= item
;
4205 /* Process the queue. */
4208 process_queue (struct objfile
*objfile
)
4210 struct dwarf2_queue_item
*item
, *next_item
;
4212 /* The queue starts out with one item, but following a DIE reference
4213 may load a new CU, adding it to the end of the queue. */
4214 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4216 if (dwarf2_per_objfile
->using_index
4217 ? !item
->per_cu
->v
.quick
->symtab
4218 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4219 process_full_comp_unit (item
->per_cu
);
4221 item
->per_cu
->queued
= 0;
4222 next_item
= item
->next
;
4226 dwarf2_queue_tail
= NULL
;
4229 /* Free all allocated queue entries. This function only releases anything if
4230 an error was thrown; if the queue was processed then it would have been
4231 freed as we went along. */
4234 dwarf2_release_queue (void *dummy
)
4236 struct dwarf2_queue_item
*item
, *last
;
4238 item
= dwarf2_queue
;
4241 /* Anything still marked queued is likely to be in an
4242 inconsistent state, so discard it. */
4243 if (item
->per_cu
->queued
)
4245 if (item
->per_cu
->cu
!= NULL
)
4246 free_one_cached_comp_unit (item
->per_cu
->cu
);
4247 item
->per_cu
->queued
= 0;
4255 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4258 /* Read in full symbols for PST, and anything it depends on. */
4261 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4263 struct dwarf2_per_cu_data
*per_cu
;
4264 struct cleanup
*back_to
;
4267 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4268 if (!pst
->dependencies
[i
]->readin
)
4270 /* Inform about additional files that need to be read in. */
4273 /* FIXME: i18n: Need to make this a single string. */
4274 fputs_filtered (" ", gdb_stdout
);
4276 fputs_filtered ("and ", gdb_stdout
);
4278 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4279 wrap_here (""); /* Flush output */
4280 gdb_flush (gdb_stdout
);
4282 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4285 per_cu
= pst
->read_symtab_private
;
4289 /* It's an include file, no symbols to read for it.
4290 Everything is in the parent symtab. */
4295 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4298 /* Load the DIEs associated with PER_CU into memory. */
4301 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4303 bfd
*abfd
= objfile
->obfd
;
4304 struct dwarf2_cu
*cu
;
4305 unsigned int offset
;
4306 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4307 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4308 struct attribute
*attr
;
4311 gdb_assert (! per_cu
->from_debug_types
);
4313 /* Set local variables from the partial symbol table info. */
4314 offset
= per_cu
->offset
;
4316 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4317 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4318 beg_of_comp_unit
= info_ptr
;
4320 if (per_cu
->cu
== NULL
)
4322 cu
= alloc_one_comp_unit (objfile
);
4326 /* If an error occurs while loading, release our storage. */
4327 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4329 /* Read in the comp_unit header. */
4330 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4332 /* Complete the cu_header. */
4333 cu
->header
.offset
= offset
;
4334 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4336 /* Read the abbrevs for this compilation unit. */
4337 dwarf2_read_abbrevs (abfd
, cu
);
4338 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4340 /* Link this compilation unit into the compilation unit tree. */
4342 cu
->per_cu
= per_cu
;
4344 /* Link this CU into read_in_chain. */
4345 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4346 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4351 info_ptr
+= cu
->header
.first_die_offset
;
4354 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4356 /* We try not to read any attributes in this function, because not
4357 all objfiles needed for references have been loaded yet, and symbol
4358 table processing isn't initialized. But we have to set the CU language,
4359 or we won't be able to build types correctly. */
4360 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
4362 set_cu_language (DW_UNSND (attr
), cu
);
4364 set_cu_language (language_minimal
, cu
);
4366 /* Similarly, if we do not read the producer, we can not apply
4367 producer-specific interpretation. */
4368 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4370 cu
->producer
= DW_STRING (attr
);
4374 do_cleanups (free_abbrevs_cleanup
);
4376 /* We've successfully allocated this compilation unit. Let our
4377 caller clean it up when finished with it. */
4378 discard_cleanups (free_cu_cleanup
);
4382 /* Add a DIE to the delayed physname list. */
4385 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4386 const char *name
, struct die_info
*die
,
4387 struct dwarf2_cu
*cu
)
4389 struct delayed_method_info mi
;
4391 mi
.fnfield_index
= fnfield_index
;
4395 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4398 /* A cleanup for freeing the delayed method list. */
4401 free_delayed_list (void *ptr
)
4403 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4404 if (cu
->method_list
!= NULL
)
4406 VEC_free (delayed_method_info
, cu
->method_list
);
4407 cu
->method_list
= NULL
;
4411 /* Compute the physnames of any methods on the CU's method list.
4413 The computation of method physnames is delayed in order to avoid the
4414 (bad) condition that one of the method's formal parameters is of an as yet
4418 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4421 struct delayed_method_info
*mi
;
4422 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4425 struct fn_fieldlist
*fn_flp
4426 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4427 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4428 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4432 /* Generate full symbol information for PST and CU, whose DIEs have
4433 already been loaded into memory. */
4436 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4438 struct dwarf2_cu
*cu
= per_cu
->cu
;
4439 struct objfile
*objfile
= per_cu
->objfile
;
4440 CORE_ADDR lowpc
, highpc
;
4441 struct symtab
*symtab
;
4442 struct cleanup
*back_to
, *delayed_list_cleanup
;
4445 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4448 back_to
= make_cleanup (really_free_pendings
, NULL
);
4449 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4451 cu
->list_in_scope
= &file_symbols
;
4453 dwarf2_find_base_address (cu
->dies
, cu
);
4455 /* Do line number decoding in read_file_scope () */
4456 process_die (cu
->dies
, cu
);
4458 /* Now that we have processed all the DIEs in the CU, all the types
4459 should be complete, and it should now be safe to compute all of the
4461 compute_delayed_physnames (cu
);
4462 do_cleanups (delayed_list_cleanup
);
4464 /* Some compilers don't define a DW_AT_high_pc attribute for the
4465 compilation unit. If the DW_AT_high_pc is missing, synthesize
4466 it, by scanning the DIE's below the compilation unit. */
4467 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4469 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4471 /* Set symtab language to language from DW_AT_language.
4472 If the compilation is from a C file generated by language preprocessors,
4473 do not set the language if it was already deduced by start_subfile. */
4475 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4477 symtab
->language
= cu
->language
;
4480 if (dwarf2_per_objfile
->using_index
)
4481 per_cu
->v
.quick
->symtab
= symtab
;
4484 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4485 pst
->symtab
= symtab
;
4489 do_cleanups (back_to
);
4492 /* Process a die and its children. */
4495 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4499 case DW_TAG_padding
:
4501 case DW_TAG_compile_unit
:
4502 read_file_scope (die
, cu
);
4504 case DW_TAG_type_unit
:
4505 read_type_unit_scope (die
, cu
);
4507 case DW_TAG_subprogram
:
4508 case DW_TAG_inlined_subroutine
:
4509 read_func_scope (die
, cu
);
4511 case DW_TAG_lexical_block
:
4512 case DW_TAG_try_block
:
4513 case DW_TAG_catch_block
:
4514 read_lexical_block_scope (die
, cu
);
4516 case DW_TAG_class_type
:
4517 case DW_TAG_interface_type
:
4518 case DW_TAG_structure_type
:
4519 case DW_TAG_union_type
:
4520 process_structure_scope (die
, cu
);
4522 case DW_TAG_enumeration_type
:
4523 process_enumeration_scope (die
, cu
);
4526 /* These dies have a type, but processing them does not create
4527 a symbol or recurse to process the children. Therefore we can
4528 read them on-demand through read_type_die. */
4529 case DW_TAG_subroutine_type
:
4530 case DW_TAG_set_type
:
4531 case DW_TAG_array_type
:
4532 case DW_TAG_pointer_type
:
4533 case DW_TAG_ptr_to_member_type
:
4534 case DW_TAG_reference_type
:
4535 case DW_TAG_string_type
:
4538 case DW_TAG_base_type
:
4539 case DW_TAG_subrange_type
:
4540 case DW_TAG_typedef
:
4541 /* Add a typedef symbol for the type definition, if it has a
4543 new_symbol (die
, read_type_die (die
, cu
), cu
);
4545 case DW_TAG_common_block
:
4546 read_common_block (die
, cu
);
4548 case DW_TAG_common_inclusion
:
4550 case DW_TAG_namespace
:
4551 processing_has_namespace_info
= 1;
4552 read_namespace (die
, cu
);
4555 processing_has_namespace_info
= 1;
4556 read_module (die
, cu
);
4558 case DW_TAG_imported_declaration
:
4559 case DW_TAG_imported_module
:
4560 processing_has_namespace_info
= 1;
4561 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4562 || cu
->language
!= language_fortran
))
4563 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4564 dwarf_tag_name (die
->tag
));
4565 read_import_statement (die
, cu
);
4568 new_symbol (die
, NULL
, cu
);
4573 /* A helper function for dwarf2_compute_name which determines whether DIE
4574 needs to have the name of the scope prepended to the name listed in the
4578 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4580 struct attribute
*attr
;
4584 case DW_TAG_namespace
:
4585 case DW_TAG_typedef
:
4586 case DW_TAG_class_type
:
4587 case DW_TAG_interface_type
:
4588 case DW_TAG_structure_type
:
4589 case DW_TAG_union_type
:
4590 case DW_TAG_enumeration_type
:
4591 case DW_TAG_enumerator
:
4592 case DW_TAG_subprogram
:
4596 case DW_TAG_variable
:
4597 /* We only need to prefix "globally" visible variables. These include
4598 any variable marked with DW_AT_external or any variable that
4599 lives in a namespace. [Variables in anonymous namespaces
4600 require prefixing, but they are not DW_AT_external.] */
4602 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4604 struct dwarf2_cu
*spec_cu
= cu
;
4606 return die_needs_namespace (die_specification (die
, &spec_cu
),
4610 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4611 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4612 && die
->parent
->tag
!= DW_TAG_module
)
4614 /* A variable in a lexical block of some kind does not need a
4615 namespace, even though in C++ such variables may be external
4616 and have a mangled name. */
4617 if (die
->parent
->tag
== DW_TAG_lexical_block
4618 || die
->parent
->tag
== DW_TAG_try_block
4619 || die
->parent
->tag
== DW_TAG_catch_block
4620 || die
->parent
->tag
== DW_TAG_subprogram
)
4629 /* Retrieve the last character from a mem_file. */
4632 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4634 char *last_char_p
= (char *) object
;
4637 *last_char_p
= buffer
[length
- 1];
4640 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4641 compute the physname for the object, which include a method's
4642 formal parameters (C++/Java) and return type (Java).
4644 For Ada, return the DIE's linkage name rather than the fully qualified
4645 name. PHYSNAME is ignored..
4647 The result is allocated on the objfile_obstack and canonicalized. */
4650 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4654 name
= dwarf2_name (die
, cu
);
4656 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4657 compute it by typename_concat inside GDB. */
4658 if (cu
->language
== language_ada
4659 || (cu
->language
== language_fortran
&& physname
))
4661 /* For Ada unit, we prefer the linkage name over the name, as
4662 the former contains the exported name, which the user expects
4663 to be able to reference. Ideally, we want the user to be able
4664 to reference this entity using either natural or linkage name,
4665 but we haven't started looking at this enhancement yet. */
4666 struct attribute
*attr
;
4668 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4670 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4671 if (attr
&& DW_STRING (attr
))
4672 return DW_STRING (attr
);
4675 /* These are the only languages we know how to qualify names in. */
4677 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4678 || cu
->language
== language_fortran
))
4680 if (die_needs_namespace (die
, cu
))
4684 struct ui_file
*buf
;
4686 prefix
= determine_prefix (die
, cu
);
4687 buf
= mem_fileopen ();
4688 if (*prefix
!= '\0')
4690 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4693 fputs_unfiltered (prefixed_name
, buf
);
4694 xfree (prefixed_name
);
4697 fputs_unfiltered (name
? name
: "", buf
);
4699 /* Template parameters may be specified in the DIE's DW_AT_name, or
4700 as children with DW_TAG_template_type_param or
4701 DW_TAG_value_type_param. If the latter, add them to the name
4702 here. If the name already has template parameters, then
4703 skip this step; some versions of GCC emit both, and
4704 it is more efficient to use the pre-computed name.
4706 Something to keep in mind about this process: it is very
4707 unlikely, or in some cases downright impossible, to produce
4708 something that will match the mangled name of a function.
4709 If the definition of the function has the same debug info,
4710 we should be able to match up with it anyway. But fallbacks
4711 using the minimal symbol, for instance to find a method
4712 implemented in a stripped copy of libstdc++, will not work.
4713 If we do not have debug info for the definition, we will have to
4714 match them up some other way.
4716 When we do name matching there is a related problem with function
4717 templates; two instantiated function templates are allowed to
4718 differ only by their return types, which we do not add here. */
4720 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4722 struct attribute
*attr
;
4723 struct die_info
*child
;
4726 die
->building_fullname
= 1;
4728 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4733 struct dwarf2_locexpr_baton
*baton
;
4736 if (child
->tag
!= DW_TAG_template_type_param
4737 && child
->tag
!= DW_TAG_template_value_param
)
4742 fputs_unfiltered ("<", buf
);
4746 fputs_unfiltered (", ", buf
);
4748 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4751 complaint (&symfile_complaints
,
4752 _("template parameter missing DW_AT_type"));
4753 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4756 type
= die_type (child
, cu
);
4758 if (child
->tag
== DW_TAG_template_type_param
)
4760 c_print_type (type
, "", buf
, -1, 0);
4764 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4767 complaint (&symfile_complaints
,
4768 _("template parameter missing DW_AT_const_value"));
4769 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4773 dwarf2_const_value_attr (attr
, type
, name
,
4774 &cu
->comp_unit_obstack
, cu
,
4775 &value
, &bytes
, &baton
);
4777 if (TYPE_NOSIGN (type
))
4778 /* GDB prints characters as NUMBER 'CHAR'. If that's
4779 changed, this can use value_print instead. */
4780 c_printchar (value
, type
, buf
);
4783 struct value_print_options opts
;
4786 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4790 else if (bytes
!= NULL
)
4792 v
= allocate_value (type
);
4793 memcpy (value_contents_writeable (v
), bytes
,
4794 TYPE_LENGTH (type
));
4797 v
= value_from_longest (type
, value
);
4799 /* Specify decimal so that we do not depend on the radix. */
4800 get_formatted_print_options (&opts
, 'd');
4802 value_print (v
, buf
, &opts
);
4808 die
->building_fullname
= 0;
4812 /* Close the argument list, with a space if necessary
4813 (nested templates). */
4814 char last_char
= '\0';
4815 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4816 if (last_char
== '>')
4817 fputs_unfiltered (" >", buf
);
4819 fputs_unfiltered (">", buf
);
4823 /* For Java and C++ methods, append formal parameter type
4824 information, if PHYSNAME. */
4826 if (physname
&& die
->tag
== DW_TAG_subprogram
4827 && (cu
->language
== language_cplus
4828 || cu
->language
== language_java
))
4830 struct type
*type
= read_type_die (die
, cu
);
4832 c_type_print_args (type
, buf
, 0, cu
->language
);
4834 if (cu
->language
== language_java
)
4836 /* For java, we must append the return type to method
4838 if (die
->tag
== DW_TAG_subprogram
)
4839 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4842 else if (cu
->language
== language_cplus
)
4844 if (TYPE_NFIELDS (type
) > 0
4845 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4846 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4847 fputs_unfiltered (" const", buf
);
4851 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4853 ui_file_delete (buf
);
4855 if (cu
->language
== language_cplus
)
4858 = dwarf2_canonicalize_name (name
, cu
,
4859 &cu
->objfile
->objfile_obstack
);
4870 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4871 If scope qualifiers are appropriate they will be added. The result
4872 will be allocated on the objfile_obstack, or NULL if the DIE does
4873 not have a name. NAME may either be from a previous call to
4874 dwarf2_name or NULL.
4876 The output string will be canonicalized (if C++/Java). */
4879 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4881 return dwarf2_compute_name (name
, die
, cu
, 0);
4884 /* Construct a physname for the given DIE in CU. NAME may either be
4885 from a previous call to dwarf2_name or NULL. The result will be
4886 allocated on the objfile_objstack or NULL if the DIE does not have a
4889 The output string will be canonicalized (if C++/Java). */
4892 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4894 return dwarf2_compute_name (name
, die
, cu
, 1);
4897 /* Read the import statement specified by the given die and record it. */
4900 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4902 struct attribute
*import_attr
;
4903 struct die_info
*imported_die
;
4904 struct dwarf2_cu
*imported_cu
;
4905 const char *imported_name
;
4906 const char *imported_name_prefix
;
4907 const char *canonical_name
;
4908 const char *import_alias
;
4909 const char *imported_declaration
= NULL
;
4910 const char *import_prefix
;
4914 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4915 if (import_attr
== NULL
)
4917 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4918 dwarf_tag_name (die
->tag
));
4923 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4924 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4925 if (imported_name
== NULL
)
4927 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4929 The import in the following code:
4943 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4944 <52> DW_AT_decl_file : 1
4945 <53> DW_AT_decl_line : 6
4946 <54> DW_AT_import : <0x75>
4947 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4949 <5b> DW_AT_decl_file : 1
4950 <5c> DW_AT_decl_line : 2
4951 <5d> DW_AT_type : <0x6e>
4953 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4954 <76> DW_AT_byte_size : 4
4955 <77> DW_AT_encoding : 5 (signed)
4957 imports the wrong die ( 0x75 instead of 0x58 ).
4958 This case will be ignored until the gcc bug is fixed. */
4962 /* Figure out the local name after import. */
4963 import_alias
= dwarf2_name (die
, cu
);
4965 /* Figure out where the statement is being imported to. */
4966 import_prefix
= determine_prefix (die
, cu
);
4968 /* Figure out what the scope of the imported die is and prepend it
4969 to the name of the imported die. */
4970 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
4972 if (imported_die
->tag
!= DW_TAG_namespace
4973 && imported_die
->tag
!= DW_TAG_module
)
4975 imported_declaration
= imported_name
;
4976 canonical_name
= imported_name_prefix
;
4978 else if (strlen (imported_name_prefix
) > 0)
4980 temp
= alloca (strlen (imported_name_prefix
)
4981 + 2 + strlen (imported_name
) + 1);
4982 strcpy (temp
, imported_name_prefix
);
4983 strcat (temp
, "::");
4984 strcat (temp
, imported_name
);
4985 canonical_name
= temp
;
4988 canonical_name
= imported_name
;
4990 cp_add_using_directive (import_prefix
,
4993 imported_declaration
,
4994 &cu
->objfile
->objfile_obstack
);
4998 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5000 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5004 free_cu_line_header (void *arg
)
5006 struct dwarf2_cu
*cu
= arg
;
5008 free_line_header (cu
->line_header
);
5009 cu
->line_header
= NULL
;
5013 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5014 char **name
, char **comp_dir
)
5016 struct attribute
*attr
;
5021 /* Find the filename. Do not use dwarf2_name here, since the filename
5022 is not a source language identifier. */
5023 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5026 *name
= DW_STRING (attr
);
5029 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5031 *comp_dir
= DW_STRING (attr
);
5032 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5034 *comp_dir
= ldirname (*name
);
5035 if (*comp_dir
!= NULL
)
5036 make_cleanup (xfree
, *comp_dir
);
5038 if (*comp_dir
!= NULL
)
5040 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5041 directory, get rid of it. */
5042 char *cp
= strchr (*comp_dir
, ':');
5044 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5049 *name
= "<unknown>";
5053 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5055 struct objfile
*objfile
= cu
->objfile
;
5056 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5057 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5058 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5059 struct attribute
*attr
;
5061 char *comp_dir
= NULL
;
5062 struct die_info
*child_die
;
5063 bfd
*abfd
= objfile
->obfd
;
5064 struct line_header
*line_header
= 0;
5067 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5069 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5071 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5072 from finish_block. */
5073 if (lowpc
== ((CORE_ADDR
) -1))
5078 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5080 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5083 set_cu_language (DW_UNSND (attr
), cu
);
5086 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5088 cu
->producer
= DW_STRING (attr
);
5090 /* We assume that we're processing GCC output. */
5091 processing_gcc_compilation
= 2;
5093 processing_has_namespace_info
= 0;
5095 start_symtab (name
, comp_dir
, lowpc
);
5096 record_debugformat ("DWARF 2");
5097 record_producer (cu
->producer
);
5099 initialize_cu_func_list (cu
);
5101 /* Decode line number information if present. We do this before
5102 processing child DIEs, so that the line header table is available
5103 for DW_AT_decl_file. */
5104 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5107 unsigned int line_offset
= DW_UNSND (attr
);
5108 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5111 cu
->line_header
= line_header
;
5112 make_cleanup (free_cu_line_header
, cu
);
5113 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5117 /* Process all dies in compilation unit. */
5118 if (die
->child
!= NULL
)
5120 child_die
= die
->child
;
5121 while (child_die
&& child_die
->tag
)
5123 process_die (child_die
, cu
);
5124 child_die
= sibling_die (child_die
);
5128 /* Decode macro information, if present. Dwarf 2 macro information
5129 refers to information in the line number info statement program
5130 header, so we can only read it if we've read the header
5132 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5133 if (attr
&& line_header
)
5135 unsigned int macro_offset
= DW_UNSND (attr
);
5137 dwarf_decode_macros (line_header
, macro_offset
,
5138 comp_dir
, abfd
, cu
);
5140 do_cleanups (back_to
);
5143 /* For TUs we want to skip the first top level sibling if it's not the
5144 actual type being defined by this TU. In this case the first top
5145 level sibling is there to provide context only. */
5148 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5150 struct objfile
*objfile
= cu
->objfile
;
5151 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5153 struct attribute
*attr
;
5155 char *comp_dir
= NULL
;
5156 struct die_info
*child_die
;
5157 bfd
*abfd
= objfile
->obfd
;
5159 /* start_symtab needs a low pc, but we don't really have one.
5160 Do what read_file_scope would do in the absence of such info. */
5161 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5163 /* Find the filename. Do not use dwarf2_name here, since the filename
5164 is not a source language identifier. */
5165 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5167 name
= DW_STRING (attr
);
5169 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5171 comp_dir
= DW_STRING (attr
);
5172 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5174 comp_dir
= ldirname (name
);
5175 if (comp_dir
!= NULL
)
5176 make_cleanup (xfree
, comp_dir
);
5182 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5184 set_cu_language (DW_UNSND (attr
), cu
);
5186 /* This isn't technically needed today. It is done for symmetry
5187 with read_file_scope. */
5188 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5190 cu
->producer
= DW_STRING (attr
);
5192 /* We assume that we're processing GCC output. */
5193 processing_gcc_compilation
= 2;
5195 processing_has_namespace_info
= 0;
5197 start_symtab (name
, comp_dir
, lowpc
);
5198 record_debugformat ("DWARF 2");
5199 record_producer (cu
->producer
);
5201 /* Process the dies in the type unit. */
5202 if (die
->child
== NULL
)
5204 dump_die_for_error (die
);
5205 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5206 bfd_get_filename (abfd
));
5209 child_die
= die
->child
;
5211 while (child_die
&& child_die
->tag
)
5213 process_die (child_die
, cu
);
5215 child_die
= sibling_die (child_die
);
5218 do_cleanups (back_to
);
5222 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5223 struct dwarf2_cu
*cu
)
5225 struct function_range
*thisfn
;
5227 thisfn
= (struct function_range
*)
5228 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5229 thisfn
->name
= name
;
5230 thisfn
->lowpc
= lowpc
;
5231 thisfn
->highpc
= highpc
;
5232 thisfn
->seen_line
= 0;
5233 thisfn
->next
= NULL
;
5235 if (cu
->last_fn
== NULL
)
5236 cu
->first_fn
= thisfn
;
5238 cu
->last_fn
->next
= thisfn
;
5240 cu
->last_fn
= thisfn
;
5243 /* qsort helper for inherit_abstract_dies. */
5246 unsigned_int_compar (const void *ap
, const void *bp
)
5248 unsigned int a
= *(unsigned int *) ap
;
5249 unsigned int b
= *(unsigned int *) bp
;
5251 return (a
> b
) - (b
> a
);
5254 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5255 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5256 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5259 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5261 struct die_info
*child_die
;
5262 unsigned die_children_count
;
5263 /* CU offsets which were referenced by children of the current DIE. */
5265 unsigned *offsets_end
, *offsetp
;
5266 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5267 struct die_info
*origin_die
;
5268 /* Iterator of the ORIGIN_DIE children. */
5269 struct die_info
*origin_child_die
;
5270 struct cleanup
*cleanups
;
5271 struct attribute
*attr
;
5272 struct dwarf2_cu
*origin_cu
;
5273 struct pending
**origin_previous_list_in_scope
;
5275 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5279 /* Note that following die references may follow to a die in a
5283 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5285 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5287 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5288 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5290 if (die
->tag
!= origin_die
->tag
5291 && !(die
->tag
== DW_TAG_inlined_subroutine
5292 && origin_die
->tag
== DW_TAG_subprogram
))
5293 complaint (&symfile_complaints
,
5294 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5295 die
->offset
, origin_die
->offset
);
5297 child_die
= die
->child
;
5298 die_children_count
= 0;
5299 while (child_die
&& child_die
->tag
)
5301 child_die
= sibling_die (child_die
);
5302 die_children_count
++;
5304 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5305 cleanups
= make_cleanup (xfree
, offsets
);
5307 offsets_end
= offsets
;
5308 child_die
= die
->child
;
5309 while (child_die
&& child_die
->tag
)
5311 /* For each CHILD_DIE, find the corresponding child of
5312 ORIGIN_DIE. If there is more than one layer of
5313 DW_AT_abstract_origin, follow them all; there shouldn't be,
5314 but GCC versions at least through 4.4 generate this (GCC PR
5316 struct die_info
*child_origin_die
= child_die
;
5317 struct dwarf2_cu
*child_origin_cu
= cu
;
5321 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5325 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5329 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5330 counterpart may exist. */
5331 if (child_origin_die
!= child_die
)
5333 if (child_die
->tag
!= child_origin_die
->tag
5334 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5335 && child_origin_die
->tag
== DW_TAG_subprogram
))
5336 complaint (&symfile_complaints
,
5337 _("Child DIE 0x%x and its abstract origin 0x%x have "
5338 "different tags"), child_die
->offset
,
5339 child_origin_die
->offset
);
5340 if (child_origin_die
->parent
!= origin_die
)
5341 complaint (&symfile_complaints
,
5342 _("Child DIE 0x%x and its abstract origin 0x%x have "
5343 "different parents"), child_die
->offset
,
5344 child_origin_die
->offset
);
5346 *offsets_end
++ = child_origin_die
->offset
;
5348 child_die
= sibling_die (child_die
);
5350 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5351 unsigned_int_compar
);
5352 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5353 if (offsetp
[-1] == *offsetp
)
5354 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5355 "to DIE 0x%x as their abstract origin"),
5356 die
->offset
, *offsetp
);
5359 origin_child_die
= origin_die
->child
;
5360 while (origin_child_die
&& origin_child_die
->tag
)
5362 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5363 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5365 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5367 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5368 process_die (origin_child_die
, origin_cu
);
5370 origin_child_die
= sibling_die (origin_child_die
);
5372 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5374 do_cleanups (cleanups
);
5378 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5380 struct objfile
*objfile
= cu
->objfile
;
5381 struct context_stack
*new;
5384 struct die_info
*child_die
;
5385 struct attribute
*attr
, *call_line
, *call_file
;
5388 struct block
*block
;
5389 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5390 VEC (symbolp
) *template_args
= NULL
;
5391 struct template_symbol
*templ_func
= NULL
;
5395 /* If we do not have call site information, we can't show the
5396 caller of this inlined function. That's too confusing, so
5397 only use the scope for local variables. */
5398 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5399 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5400 if (call_line
== NULL
|| call_file
== NULL
)
5402 read_lexical_block_scope (die
, cu
);
5407 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5409 name
= dwarf2_name (die
, cu
);
5411 /* Ignore functions with missing or empty names. These are actually
5412 illegal according to the DWARF standard. */
5415 complaint (&symfile_complaints
,
5416 _("missing name for subprogram DIE at %d"), die
->offset
);
5420 /* Ignore functions with missing or invalid low and high pc attributes. */
5421 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5423 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5424 if (!attr
|| !DW_UNSND (attr
))
5425 complaint (&symfile_complaints
,
5426 _("cannot get low and high bounds for subprogram DIE at %d"),
5434 /* Record the function range for dwarf_decode_lines. */
5435 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5437 /* If we have any template arguments, then we must allocate a
5438 different sort of symbol. */
5439 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5441 if (child_die
->tag
== DW_TAG_template_type_param
5442 || child_die
->tag
== DW_TAG_template_value_param
)
5444 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5445 struct template_symbol
);
5446 templ_func
->base
.is_cplus_template_function
= 1;
5451 new = push_context (0, lowpc
);
5452 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5453 (struct symbol
*) templ_func
);
5455 /* If there is a location expression for DW_AT_frame_base, record
5457 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5459 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5460 expression is being recorded directly in the function's symbol
5461 and not in a separate frame-base object. I guess this hack is
5462 to avoid adding some sort of frame-base adjunct/annex to the
5463 function's symbol :-(. The problem with doing this is that it
5464 results in a function symbol with a location expression that
5465 has nothing to do with the location of the function, ouch! The
5466 relationship should be: a function's symbol has-a frame base; a
5467 frame-base has-a location expression. */
5468 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5470 cu
->list_in_scope
= &local_symbols
;
5472 if (die
->child
!= NULL
)
5474 child_die
= die
->child
;
5475 while (child_die
&& child_die
->tag
)
5477 if (child_die
->tag
== DW_TAG_template_type_param
5478 || child_die
->tag
== DW_TAG_template_value_param
)
5480 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5482 VEC_safe_push (symbolp
, template_args
, arg
);
5485 process_die (child_die
, cu
);
5486 child_die
= sibling_die (child_die
);
5490 inherit_abstract_dies (die
, cu
);
5492 /* If we have a DW_AT_specification, we might need to import using
5493 directives from the context of the specification DIE. See the
5494 comment in determine_prefix. */
5495 if (cu
->language
== language_cplus
5496 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5498 struct dwarf2_cu
*spec_cu
= cu
;
5499 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5503 child_die
= spec_die
->child
;
5504 while (child_die
&& child_die
->tag
)
5506 if (child_die
->tag
== DW_TAG_imported_module
)
5507 process_die (child_die
, spec_cu
);
5508 child_die
= sibling_die (child_die
);
5511 /* In some cases, GCC generates specification DIEs that
5512 themselves contain DW_AT_specification attributes. */
5513 spec_die
= die_specification (spec_die
, &spec_cu
);
5517 new = pop_context ();
5518 /* Make a block for the local symbols within. */
5519 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5520 lowpc
, highpc
, objfile
);
5522 /* For C++, set the block's scope. */
5523 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5524 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5525 determine_prefix (die
, cu
),
5526 processing_has_namespace_info
);
5528 /* If we have address ranges, record them. */
5529 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5531 /* Attach template arguments to function. */
5532 if (! VEC_empty (symbolp
, template_args
))
5534 gdb_assert (templ_func
!= NULL
);
5536 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5537 templ_func
->template_arguments
5538 = obstack_alloc (&objfile
->objfile_obstack
,
5539 (templ_func
->n_template_arguments
5540 * sizeof (struct symbol
*)));
5541 memcpy (templ_func
->template_arguments
,
5542 VEC_address (symbolp
, template_args
),
5543 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5544 VEC_free (symbolp
, template_args
);
5547 /* In C++, we can have functions nested inside functions (e.g., when
5548 a function declares a class that has methods). This means that
5549 when we finish processing a function scope, we may need to go
5550 back to building a containing block's symbol lists. */
5551 local_symbols
= new->locals
;
5552 param_symbols
= new->params
;
5553 using_directives
= new->using_directives
;
5555 /* If we've finished processing a top-level function, subsequent
5556 symbols go in the file symbol list. */
5557 if (outermost_context_p ())
5558 cu
->list_in_scope
= &file_symbols
;
5561 /* Process all the DIES contained within a lexical block scope. Start
5562 a new scope, process the dies, and then close the scope. */
5565 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5567 struct objfile
*objfile
= cu
->objfile
;
5568 struct context_stack
*new;
5569 CORE_ADDR lowpc
, highpc
;
5570 struct die_info
*child_die
;
5573 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5575 /* Ignore blocks with missing or invalid low and high pc attributes. */
5576 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5577 as multiple lexical blocks? Handling children in a sane way would
5578 be nasty. Might be easier to properly extend generic blocks to
5580 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5585 push_context (0, lowpc
);
5586 if (die
->child
!= NULL
)
5588 child_die
= die
->child
;
5589 while (child_die
&& child_die
->tag
)
5591 process_die (child_die
, cu
);
5592 child_die
= sibling_die (child_die
);
5595 new = pop_context ();
5597 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5600 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5603 /* Note that recording ranges after traversing children, as we
5604 do here, means that recording a parent's ranges entails
5605 walking across all its children's ranges as they appear in
5606 the address map, which is quadratic behavior.
5608 It would be nicer to record the parent's ranges before
5609 traversing its children, simply overriding whatever you find
5610 there. But since we don't even decide whether to create a
5611 block until after we've traversed its children, that's hard
5613 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5615 local_symbols
= new->locals
;
5616 using_directives
= new->using_directives
;
5619 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5620 Return 1 if the attributes are present and valid, otherwise, return 0.
5621 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5624 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5625 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5626 struct partial_symtab
*ranges_pst
)
5628 struct objfile
*objfile
= cu
->objfile
;
5629 struct comp_unit_head
*cu_header
= &cu
->header
;
5630 bfd
*obfd
= objfile
->obfd
;
5631 unsigned int addr_size
= cu_header
->addr_size
;
5632 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5633 /* Base address selection entry. */
5644 found_base
= cu
->base_known
;
5645 base
= cu
->base_address
;
5647 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5648 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5650 complaint (&symfile_complaints
,
5651 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5655 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5657 /* Read in the largest possible address. */
5658 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5659 if ((marker
& mask
) == mask
)
5661 /* If we found the largest possible address, then
5662 read the base address. */
5663 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5664 buffer
+= 2 * addr_size
;
5665 offset
+= 2 * addr_size
;
5671 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5675 CORE_ADDR range_beginning
, range_end
;
5677 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5678 buffer
+= addr_size
;
5679 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5680 buffer
+= addr_size
;
5681 offset
+= 2 * addr_size
;
5683 /* An end of list marker is a pair of zero addresses. */
5684 if (range_beginning
== 0 && range_end
== 0)
5685 /* Found the end of list entry. */
5688 /* Each base address selection entry is a pair of 2 values.
5689 The first is the largest possible address, the second is
5690 the base address. Check for a base address here. */
5691 if ((range_beginning
& mask
) == mask
)
5693 /* If we found the largest possible address, then
5694 read the base address. */
5695 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5702 /* We have no valid base address for the ranges
5704 complaint (&symfile_complaints
,
5705 _("Invalid .debug_ranges data (no base address)"));
5709 range_beginning
+= base
;
5712 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5713 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5714 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5717 /* FIXME: This is recording everything as a low-high
5718 segment of consecutive addresses. We should have a
5719 data structure for discontiguous block ranges
5723 low
= range_beginning
;
5729 if (range_beginning
< low
)
5730 low
= range_beginning
;
5731 if (range_end
> high
)
5737 /* If the first entry is an end-of-list marker, the range
5738 describes an empty scope, i.e. no instructions. */
5744 *high_return
= high
;
5748 /* Get low and high pc attributes from a die. Return 1 if the attributes
5749 are present and valid, otherwise, return 0. Return -1 if the range is
5750 discontinuous, i.e. derived from DW_AT_ranges information. */
5752 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5753 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5754 struct partial_symtab
*pst
)
5756 struct attribute
*attr
;
5761 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5764 high
= DW_ADDR (attr
);
5765 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5767 low
= DW_ADDR (attr
);
5769 /* Found high w/o low attribute. */
5772 /* Found consecutive range of addresses. */
5777 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5780 /* Value of the DW_AT_ranges attribute is the offset in the
5781 .debug_ranges section. */
5782 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5784 /* Found discontinuous range of addresses. */
5792 /* When using the GNU linker, .gnu.linkonce. sections are used to
5793 eliminate duplicate copies of functions and vtables and such.
5794 The linker will arbitrarily choose one and discard the others.
5795 The AT_*_pc values for such functions refer to local labels in
5796 these sections. If the section from that file was discarded, the
5797 labels are not in the output, so the relocs get a value of 0.
5798 If this is a discarded function, mark the pc bounds as invalid,
5799 so that GDB will ignore it. */
5800 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5808 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5809 its low and high PC addresses. Do nothing if these addresses could not
5810 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5811 and HIGHPC to the high address if greater than HIGHPC. */
5814 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5815 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5816 struct dwarf2_cu
*cu
)
5818 CORE_ADDR low
, high
;
5819 struct die_info
*child
= die
->child
;
5821 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5823 *lowpc
= min (*lowpc
, low
);
5824 *highpc
= max (*highpc
, high
);
5827 /* If the language does not allow nested subprograms (either inside
5828 subprograms or lexical blocks), we're done. */
5829 if (cu
->language
!= language_ada
)
5832 /* Check all the children of the given DIE. If it contains nested
5833 subprograms, then check their pc bounds. Likewise, we need to
5834 check lexical blocks as well, as they may also contain subprogram
5836 while (child
&& child
->tag
)
5838 if (child
->tag
== DW_TAG_subprogram
5839 || child
->tag
== DW_TAG_lexical_block
)
5840 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5841 child
= sibling_die (child
);
5845 /* Get the low and high pc's represented by the scope DIE, and store
5846 them in *LOWPC and *HIGHPC. If the correct values can't be
5847 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5850 get_scope_pc_bounds (struct die_info
*die
,
5851 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5852 struct dwarf2_cu
*cu
)
5854 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5855 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5856 CORE_ADDR current_low
, current_high
;
5858 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5860 best_low
= current_low
;
5861 best_high
= current_high
;
5865 struct die_info
*child
= die
->child
;
5867 while (child
&& child
->tag
)
5869 switch (child
->tag
) {
5870 case DW_TAG_subprogram
:
5871 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5873 case DW_TAG_namespace
:
5875 /* FIXME: carlton/2004-01-16: Should we do this for
5876 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5877 that current GCC's always emit the DIEs corresponding
5878 to definitions of methods of classes as children of a
5879 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5880 the DIEs giving the declarations, which could be
5881 anywhere). But I don't see any reason why the
5882 standards says that they have to be there. */
5883 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5885 if (current_low
!= ((CORE_ADDR
) -1))
5887 best_low
= min (best_low
, current_low
);
5888 best_high
= max (best_high
, current_high
);
5896 child
= sibling_die (child
);
5901 *highpc
= best_high
;
5904 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5907 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5908 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5910 struct attribute
*attr
;
5912 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5915 CORE_ADDR high
= DW_ADDR (attr
);
5917 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5920 CORE_ADDR low
= DW_ADDR (attr
);
5922 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5926 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5929 bfd
*obfd
= cu
->objfile
->obfd
;
5931 /* The value of the DW_AT_ranges attribute is the offset of the
5932 address range list in the .debug_ranges section. */
5933 unsigned long offset
= DW_UNSND (attr
);
5934 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5936 /* For some target architectures, but not others, the
5937 read_address function sign-extends the addresses it returns.
5938 To recognize base address selection entries, we need a
5940 unsigned int addr_size
= cu
->header
.addr_size
;
5941 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5943 /* The base address, to which the next pair is relative. Note
5944 that this 'base' is a DWARF concept: most entries in a range
5945 list are relative, to reduce the number of relocs against the
5946 debugging information. This is separate from this function's
5947 'baseaddr' argument, which GDB uses to relocate debugging
5948 information from a shared library based on the address at
5949 which the library was loaded. */
5950 CORE_ADDR base
= cu
->base_address
;
5951 int base_known
= cu
->base_known
;
5953 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5954 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5956 complaint (&symfile_complaints
,
5957 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5964 unsigned int bytes_read
;
5965 CORE_ADDR start
, end
;
5967 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5968 buffer
+= bytes_read
;
5969 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5970 buffer
+= bytes_read
;
5972 /* Did we find the end of the range list? */
5973 if (start
== 0 && end
== 0)
5976 /* Did we find a base address selection entry? */
5977 else if ((start
& base_select_mask
) == base_select_mask
)
5983 /* We found an ordinary address range. */
5988 complaint (&symfile_complaints
,
5989 _("Invalid .debug_ranges data (no base address)"));
5993 record_block_range (block
,
5994 baseaddr
+ base
+ start
,
5995 baseaddr
+ base
+ end
- 1);
6001 /* Add an aggregate field to the field list. */
6004 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6005 struct dwarf2_cu
*cu
)
6007 struct objfile
*objfile
= cu
->objfile
;
6008 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6009 struct nextfield
*new_field
;
6010 struct attribute
*attr
;
6012 char *fieldname
= "";
6014 /* Allocate a new field list entry and link it in. */
6015 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6016 make_cleanup (xfree
, new_field
);
6017 memset (new_field
, 0, sizeof (struct nextfield
));
6019 if (die
->tag
== DW_TAG_inheritance
)
6021 new_field
->next
= fip
->baseclasses
;
6022 fip
->baseclasses
= new_field
;
6026 new_field
->next
= fip
->fields
;
6027 fip
->fields
= new_field
;
6031 /* Handle accessibility and virtuality of field.
6032 The default accessibility for members is public, the default
6033 accessibility for inheritance is private. */
6034 if (die
->tag
!= DW_TAG_inheritance
)
6035 new_field
->accessibility
= DW_ACCESS_public
;
6037 new_field
->accessibility
= DW_ACCESS_private
;
6038 new_field
->virtuality
= DW_VIRTUALITY_none
;
6040 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6042 new_field
->accessibility
= DW_UNSND (attr
);
6043 if (new_field
->accessibility
!= DW_ACCESS_public
)
6044 fip
->non_public_fields
= 1;
6045 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6047 new_field
->virtuality
= DW_UNSND (attr
);
6049 fp
= &new_field
->field
;
6051 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6053 /* Data member other than a C++ static data member. */
6055 /* Get type of field. */
6056 fp
->type
= die_type (die
, cu
);
6058 SET_FIELD_BITPOS (*fp
, 0);
6060 /* Get bit size of field (zero if none). */
6061 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6064 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6068 FIELD_BITSIZE (*fp
) = 0;
6071 /* Get bit offset of field. */
6072 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6075 int byte_offset
= 0;
6077 if (attr_form_is_section_offset (attr
))
6078 dwarf2_complex_location_expr_complaint ();
6079 else if (attr_form_is_constant (attr
))
6080 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6081 else if (attr_form_is_block (attr
))
6082 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6084 dwarf2_complex_location_expr_complaint ();
6086 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6088 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6091 if (gdbarch_bits_big_endian (gdbarch
))
6093 /* For big endian bits, the DW_AT_bit_offset gives the
6094 additional bit offset from the MSB of the containing
6095 anonymous object to the MSB of the field. We don't
6096 have to do anything special since we don't need to
6097 know the size of the anonymous object. */
6098 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6102 /* For little endian bits, compute the bit offset to the
6103 MSB of the anonymous object, subtract off the number of
6104 bits from the MSB of the field to the MSB of the
6105 object, and then subtract off the number of bits of
6106 the field itself. The result is the bit offset of
6107 the LSB of the field. */
6109 int bit_offset
= DW_UNSND (attr
);
6111 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6114 /* The size of the anonymous object containing
6115 the bit field is explicit, so use the
6116 indicated size (in bytes). */
6117 anonymous_size
= DW_UNSND (attr
);
6121 /* The size of the anonymous object containing
6122 the bit field must be inferred from the type
6123 attribute of the data member containing the
6125 anonymous_size
= TYPE_LENGTH (fp
->type
);
6127 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6128 - bit_offset
- FIELD_BITSIZE (*fp
);
6132 /* Get name of field. */
6133 fieldname
= dwarf2_name (die
, cu
);
6134 if (fieldname
== NULL
)
6137 /* The name is already allocated along with this objfile, so we don't
6138 need to duplicate it for the type. */
6139 fp
->name
= fieldname
;
6141 /* Change accessibility for artificial fields (e.g. virtual table
6142 pointer or virtual base class pointer) to private. */
6143 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6145 FIELD_ARTIFICIAL (*fp
) = 1;
6146 new_field
->accessibility
= DW_ACCESS_private
;
6147 fip
->non_public_fields
= 1;
6150 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6152 /* C++ static member. */
6154 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6155 is a declaration, but all versions of G++ as of this writing
6156 (so through at least 3.2.1) incorrectly generate
6157 DW_TAG_variable tags. */
6161 /* Get name of field. */
6162 fieldname
= dwarf2_name (die
, cu
);
6163 if (fieldname
== NULL
)
6166 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6168 /* Only create a symbol if this is an external value.
6169 new_symbol checks this and puts the value in the global symbol
6170 table, which we want. If it is not external, new_symbol
6171 will try to put the value in cu->list_in_scope which is wrong. */
6172 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6174 /* A static const member, not much different than an enum as far as
6175 we're concerned, except that we can support more types. */
6176 new_symbol (die
, NULL
, cu
);
6179 /* Get physical name. */
6180 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6182 /* The name is already allocated along with this objfile, so we don't
6183 need to duplicate it for the type. */
6184 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6185 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6186 FIELD_NAME (*fp
) = fieldname
;
6188 else if (die
->tag
== DW_TAG_inheritance
)
6190 /* C++ base class field. */
6191 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6194 int byte_offset
= 0;
6196 if (attr_form_is_section_offset (attr
))
6197 dwarf2_complex_location_expr_complaint ();
6198 else if (attr_form_is_constant (attr
))
6199 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6200 else if (attr_form_is_block (attr
))
6201 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6203 dwarf2_complex_location_expr_complaint ();
6205 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6207 FIELD_BITSIZE (*fp
) = 0;
6208 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6209 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6210 fip
->nbaseclasses
++;
6214 /* Add a typedef defined in the scope of the FIP's class. */
6217 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6218 struct dwarf2_cu
*cu
)
6220 struct objfile
*objfile
= cu
->objfile
;
6221 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6222 struct typedef_field_list
*new_field
;
6223 struct attribute
*attr
;
6224 struct typedef_field
*fp
;
6225 char *fieldname
= "";
6227 /* Allocate a new field list entry and link it in. */
6228 new_field
= xzalloc (sizeof (*new_field
));
6229 make_cleanup (xfree
, new_field
);
6231 gdb_assert (die
->tag
== DW_TAG_typedef
);
6233 fp
= &new_field
->field
;
6235 /* Get name of field. */
6236 fp
->name
= dwarf2_name (die
, cu
);
6237 if (fp
->name
== NULL
)
6240 fp
->type
= read_type_die (die
, cu
);
6242 new_field
->next
= fip
->typedef_field_list
;
6243 fip
->typedef_field_list
= new_field
;
6244 fip
->typedef_field_list_count
++;
6247 /* Create the vector of fields, and attach it to the type. */
6250 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6251 struct dwarf2_cu
*cu
)
6253 int nfields
= fip
->nfields
;
6255 /* Record the field count, allocate space for the array of fields,
6256 and create blank accessibility bitfields if necessary. */
6257 TYPE_NFIELDS (type
) = nfields
;
6258 TYPE_FIELDS (type
) = (struct field
*)
6259 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6260 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6262 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6264 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6266 TYPE_FIELD_PRIVATE_BITS (type
) =
6267 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6268 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6270 TYPE_FIELD_PROTECTED_BITS (type
) =
6271 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6272 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6274 /* We don't set TYPE_FIELD_IGNORE_BITS here. The DWARF reader
6275 never sets any bits in that array, so leaving it NULL lets us
6276 save a little memory. */
6279 /* If the type has baseclasses, allocate and clear a bit vector for
6280 TYPE_FIELD_VIRTUAL_BITS. */
6281 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6283 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6284 unsigned char *pointer
;
6286 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6287 pointer
= TYPE_ALLOC (type
, num_bytes
);
6288 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6289 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6290 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6293 /* Copy the saved-up fields into the field vector. Start from the head
6294 of the list, adding to the tail of the field array, so that they end
6295 up in the same order in the array in which they were added to the list. */
6296 while (nfields
-- > 0)
6298 struct nextfield
*fieldp
;
6302 fieldp
= fip
->fields
;
6303 fip
->fields
= fieldp
->next
;
6307 fieldp
= fip
->baseclasses
;
6308 fip
->baseclasses
= fieldp
->next
;
6311 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6312 switch (fieldp
->accessibility
)
6314 case DW_ACCESS_private
:
6315 if (cu
->language
!= language_ada
)
6316 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6319 case DW_ACCESS_protected
:
6320 if (cu
->language
!= language_ada
)
6321 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6324 case DW_ACCESS_public
:
6328 /* Unknown accessibility. Complain and treat it as public. */
6330 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6331 fieldp
->accessibility
);
6335 if (nfields
< fip
->nbaseclasses
)
6337 switch (fieldp
->virtuality
)
6339 case DW_VIRTUALITY_virtual
:
6340 case DW_VIRTUALITY_pure_virtual
:
6341 if (cu
->language
== language_ada
)
6342 error ("unexpected virtuality in component of Ada type");
6343 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6350 /* Add a member function to the proper fieldlist. */
6353 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6354 struct type
*type
, struct dwarf2_cu
*cu
)
6356 struct objfile
*objfile
= cu
->objfile
;
6357 struct attribute
*attr
;
6358 struct fnfieldlist
*flp
;
6360 struct fn_field
*fnp
;
6362 struct nextfnfield
*new_fnfield
;
6363 struct type
*this_type
;
6365 if (cu
->language
== language_ada
)
6366 error ("unexpected member function in Ada type");
6368 /* Get name of member function. */
6369 fieldname
= dwarf2_name (die
, cu
);
6370 if (fieldname
== NULL
)
6373 /* Look up member function name in fieldlist. */
6374 for (i
= 0; i
< fip
->nfnfields
; i
++)
6376 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6380 /* Create new list element if necessary. */
6381 if (i
< fip
->nfnfields
)
6382 flp
= &fip
->fnfieldlists
[i
];
6385 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6387 fip
->fnfieldlists
= (struct fnfieldlist
*)
6388 xrealloc (fip
->fnfieldlists
,
6389 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6390 * sizeof (struct fnfieldlist
));
6391 if (fip
->nfnfields
== 0)
6392 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6394 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6395 flp
->name
= fieldname
;
6398 i
= fip
->nfnfields
++;
6401 /* Create a new member function field and chain it to the field list
6403 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6404 make_cleanup (xfree
, new_fnfield
);
6405 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6406 new_fnfield
->next
= flp
->head
;
6407 flp
->head
= new_fnfield
;
6410 /* Fill in the member function field info. */
6411 fnp
= &new_fnfield
->fnfield
;
6413 /* Delay processing of the physname until later. */
6414 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6416 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6421 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6422 fnp
->physname
= physname
? physname
: "";
6425 fnp
->type
= alloc_type (objfile
);
6426 this_type
= read_type_die (die
, cu
);
6427 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6429 int nparams
= TYPE_NFIELDS (this_type
);
6431 /* TYPE is the domain of this method, and THIS_TYPE is the type
6432 of the method itself (TYPE_CODE_METHOD). */
6433 smash_to_method_type (fnp
->type
, type
,
6434 TYPE_TARGET_TYPE (this_type
),
6435 TYPE_FIELDS (this_type
),
6436 TYPE_NFIELDS (this_type
),
6437 TYPE_VARARGS (this_type
));
6439 /* Handle static member functions.
6440 Dwarf2 has no clean way to discern C++ static and non-static
6441 member functions. G++ helps GDB by marking the first
6442 parameter for non-static member functions (which is the
6443 this pointer) as artificial. We obtain this information
6444 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6445 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6446 fnp
->voffset
= VOFFSET_STATIC
;
6449 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6450 dwarf2_full_name (fieldname
, die
, cu
));
6452 /* Get fcontext from DW_AT_containing_type if present. */
6453 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6454 fnp
->fcontext
= die_containing_type (die
, cu
);
6456 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6457 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6459 /* Get accessibility. */
6460 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6463 switch (DW_UNSND (attr
))
6465 case DW_ACCESS_private
:
6466 fnp
->is_private
= 1;
6468 case DW_ACCESS_protected
:
6469 fnp
->is_protected
= 1;
6474 /* Check for artificial methods. */
6475 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6476 if (attr
&& DW_UNSND (attr
) != 0)
6477 fnp
->is_artificial
= 1;
6479 /* Get index in virtual function table if it is a virtual member
6480 function. For older versions of GCC, this is an offset in the
6481 appropriate virtual table, as specified by DW_AT_containing_type.
6482 For everyone else, it is an expression to be evaluated relative
6483 to the object address. */
6485 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6488 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6490 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6492 /* Old-style GCC. */
6493 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6495 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6496 || (DW_BLOCK (attr
)->size
> 1
6497 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6498 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6500 struct dwarf_block blk
;
6503 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6505 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6506 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6507 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6508 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6509 dwarf2_complex_location_expr_complaint ();
6511 fnp
->voffset
/= cu
->header
.addr_size
;
6515 dwarf2_complex_location_expr_complaint ();
6518 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6520 else if (attr_form_is_section_offset (attr
))
6522 dwarf2_complex_location_expr_complaint ();
6526 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6532 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6533 if (attr
&& DW_UNSND (attr
))
6535 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6536 complaint (&symfile_complaints
,
6537 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6538 fieldname
, die
->offset
);
6539 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6540 TYPE_CPLUS_DYNAMIC (type
) = 1;
6545 /* Create the vector of member function fields, and attach it to the type. */
6548 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6549 struct dwarf2_cu
*cu
)
6551 struct fnfieldlist
*flp
;
6552 int total_length
= 0;
6555 if (cu
->language
== language_ada
)
6556 error ("unexpected member functions in Ada type");
6558 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6559 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6560 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6562 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6564 struct nextfnfield
*nfp
= flp
->head
;
6565 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6568 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6569 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6570 fn_flp
->fn_fields
= (struct fn_field
*)
6571 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6572 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6573 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6575 total_length
+= flp
->length
;
6578 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6579 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6582 /* Returns non-zero if NAME is the name of a vtable member in CU's
6583 language, zero otherwise. */
6585 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6587 static const char vptr
[] = "_vptr";
6588 static const char vtable
[] = "vtable";
6590 /* Look for the C++ and Java forms of the vtable. */
6591 if ((cu
->language
== language_java
6592 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6593 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6594 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6600 /* GCC outputs unnamed structures that are really pointers to member
6601 functions, with the ABI-specified layout. If TYPE describes
6602 such a structure, smash it into a member function type.
6604 GCC shouldn't do this; it should just output pointer to member DIEs.
6605 This is GCC PR debug/28767. */
6608 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6610 struct type
*pfn_type
, *domain_type
, *new_type
;
6612 /* Check for a structure with no name and two children. */
6613 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6616 /* Check for __pfn and __delta members. */
6617 if (TYPE_FIELD_NAME (type
, 0) == NULL
6618 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6619 || TYPE_FIELD_NAME (type
, 1) == NULL
6620 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6623 /* Find the type of the method. */
6624 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6625 if (pfn_type
== NULL
6626 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6627 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6630 /* Look for the "this" argument. */
6631 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6632 if (TYPE_NFIELDS (pfn_type
) == 0
6633 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6634 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6637 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6638 new_type
= alloc_type (objfile
);
6639 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6640 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6641 TYPE_VARARGS (pfn_type
));
6642 smash_to_methodptr_type (type
, new_type
);
6645 /* Called when we find the DIE that starts a structure or union scope
6646 (definition) to process all dies that define the members of the
6649 NOTE: we need to call struct_type regardless of whether or not the
6650 DIE has an at_name attribute, since it might be an anonymous
6651 structure or union. This gets the type entered into our set of
6654 However, if the structure is incomplete (an opaque struct/union)
6655 then suppress creating a symbol table entry for it since gdb only
6656 wants to find the one with the complete definition. Note that if
6657 it is complete, we just call new_symbol, which does it's own
6658 checking about whether the struct/union is anonymous or not (and
6659 suppresses creating a symbol table entry itself). */
6661 static struct type
*
6662 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6664 struct objfile
*objfile
= cu
->objfile
;
6666 struct attribute
*attr
;
6668 struct cleanup
*back_to
;
6670 /* If the definition of this type lives in .debug_types, read that type.
6671 Don't follow DW_AT_specification though, that will take us back up
6672 the chain and we want to go down. */
6673 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6676 struct dwarf2_cu
*type_cu
= cu
;
6677 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6679 /* We could just recurse on read_structure_type, but we need to call
6680 get_die_type to ensure only one type for this DIE is created.
6681 This is important, for example, because for c++ classes we need
6682 TYPE_NAME set which is only done by new_symbol. Blech. */
6683 type
= read_type_die (type_die
, type_cu
);
6685 /* TYPE_CU may not be the same as CU.
6686 Ensure TYPE is recorded in CU's type_hash table. */
6687 return set_die_type (die
, type
, cu
);
6690 back_to
= make_cleanup (null_cleanup
, 0);
6692 type
= alloc_type (objfile
);
6693 INIT_CPLUS_SPECIFIC (type
);
6695 name
= dwarf2_name (die
, cu
);
6698 if (cu
->language
== language_cplus
6699 || cu
->language
== language_java
)
6701 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6703 /* dwarf2_full_name might have already finished building the DIE's
6704 type. If so, there is no need to continue. */
6705 if (get_die_type (die
, cu
) != NULL
)
6706 return get_die_type (die
, cu
);
6708 TYPE_TAG_NAME (type
) = full_name
;
6709 if (die
->tag
== DW_TAG_structure_type
6710 || die
->tag
== DW_TAG_class_type
)
6711 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6715 /* The name is already allocated along with this objfile, so
6716 we don't need to duplicate it for the type. */
6717 TYPE_TAG_NAME (type
) = (char *) name
;
6718 if (die
->tag
== DW_TAG_class_type
)
6719 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6723 if (die
->tag
== DW_TAG_structure_type
)
6725 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6727 else if (die
->tag
== DW_TAG_union_type
)
6729 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6733 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6736 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6737 TYPE_DECLARED_CLASS (type
) = 1;
6739 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6742 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6746 TYPE_LENGTH (type
) = 0;
6749 TYPE_STUB_SUPPORTED (type
) = 1;
6750 if (die_is_declaration (die
, cu
))
6751 TYPE_STUB (type
) = 1;
6752 else if (attr
== NULL
&& die
->child
== NULL
6753 && producer_is_realview (cu
->producer
))
6754 /* RealView does not output the required DW_AT_declaration
6755 on incomplete types. */
6756 TYPE_STUB (type
) = 1;
6758 /* We need to add the type field to the die immediately so we don't
6759 infinitely recurse when dealing with pointers to the structure
6760 type within the structure itself. */
6761 set_die_type (die
, type
, cu
);
6763 /* set_die_type should be already done. */
6764 set_descriptive_type (type
, die
, cu
);
6766 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6768 struct field_info fi
;
6769 struct die_info
*child_die
;
6770 VEC (symbolp
) *template_args
= NULL
;
6772 memset (&fi
, 0, sizeof (struct field_info
));
6774 child_die
= die
->child
;
6776 while (child_die
&& child_die
->tag
)
6778 if (child_die
->tag
== DW_TAG_member
6779 || child_die
->tag
== DW_TAG_variable
)
6781 /* NOTE: carlton/2002-11-05: A C++ static data member
6782 should be a DW_TAG_member that is a declaration, but
6783 all versions of G++ as of this writing (so through at
6784 least 3.2.1) incorrectly generate DW_TAG_variable
6785 tags for them instead. */
6786 dwarf2_add_field (&fi
, child_die
, cu
);
6788 else if (child_die
->tag
== DW_TAG_subprogram
)
6790 /* C++ member function. */
6791 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6793 else if (child_die
->tag
== DW_TAG_inheritance
)
6795 /* C++ base class field. */
6796 dwarf2_add_field (&fi
, child_die
, cu
);
6798 else if (child_die
->tag
== DW_TAG_typedef
)
6799 dwarf2_add_typedef (&fi
, child_die
, cu
);
6800 else if (child_die
->tag
== DW_TAG_template_type_param
6801 || child_die
->tag
== DW_TAG_template_value_param
)
6803 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6805 VEC_safe_push (symbolp
, template_args
, arg
);
6808 child_die
= sibling_die (child_die
);
6811 /* Attach template arguments to type. */
6812 if (! VEC_empty (symbolp
, template_args
))
6814 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6815 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6816 = VEC_length (symbolp
, template_args
);
6817 TYPE_TEMPLATE_ARGUMENTS (type
)
6818 = obstack_alloc (&objfile
->objfile_obstack
,
6819 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6820 * sizeof (struct symbol
*)));
6821 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6822 VEC_address (symbolp
, template_args
),
6823 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6824 * sizeof (struct symbol
*)));
6825 VEC_free (symbolp
, template_args
);
6828 /* Attach fields and member functions to the type. */
6830 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6833 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6835 /* Get the type which refers to the base class (possibly this
6836 class itself) which contains the vtable pointer for the current
6837 class from the DW_AT_containing_type attribute. This use of
6838 DW_AT_containing_type is a GNU extension. */
6840 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6842 struct type
*t
= die_containing_type (die
, cu
);
6844 TYPE_VPTR_BASETYPE (type
) = t
;
6849 /* Our own class provides vtbl ptr. */
6850 for (i
= TYPE_NFIELDS (t
) - 1;
6851 i
>= TYPE_N_BASECLASSES (t
);
6854 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6856 if (is_vtable_name (fieldname
, cu
))
6858 TYPE_VPTR_FIELDNO (type
) = i
;
6863 /* Complain if virtual function table field not found. */
6864 if (i
< TYPE_N_BASECLASSES (t
))
6865 complaint (&symfile_complaints
,
6866 _("virtual function table pointer not found when defining class '%s'"),
6867 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6872 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6875 else if (cu
->producer
6876 && strncmp (cu
->producer
,
6877 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6879 /* The IBM XLC compiler does not provide direct indication
6880 of the containing type, but the vtable pointer is
6881 always named __vfp. */
6885 for (i
= TYPE_NFIELDS (type
) - 1;
6886 i
>= TYPE_N_BASECLASSES (type
);
6889 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6891 TYPE_VPTR_FIELDNO (type
) = i
;
6892 TYPE_VPTR_BASETYPE (type
) = type
;
6899 /* Copy fi.typedef_field_list linked list elements content into the
6900 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6901 if (fi
.typedef_field_list
)
6903 int i
= fi
.typedef_field_list_count
;
6905 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6906 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6907 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6908 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6910 /* Reverse the list order to keep the debug info elements order. */
6913 struct typedef_field
*dest
, *src
;
6915 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6916 src
= &fi
.typedef_field_list
->field
;
6917 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6923 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6925 do_cleanups (back_to
);
6930 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6932 struct die_info
*child_die
= die
->child
;
6933 struct type
*this_type
;
6935 this_type
= get_die_type (die
, cu
);
6936 if (this_type
== NULL
)
6937 this_type
= read_structure_type (die
, cu
);
6939 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6940 snapshots) has been known to create a die giving a declaration
6941 for a class that has, as a child, a die giving a definition for a
6942 nested class. So we have to process our children even if the
6943 current die is a declaration. Normally, of course, a declaration
6944 won't have any children at all. */
6946 while (child_die
!= NULL
&& child_die
->tag
)
6948 if (child_die
->tag
== DW_TAG_member
6949 || child_die
->tag
== DW_TAG_variable
6950 || child_die
->tag
== DW_TAG_inheritance
6951 || child_die
->tag
== DW_TAG_template_value_param
6952 || child_die
->tag
== DW_TAG_template_type_param
)
6957 process_die (child_die
, cu
);
6959 child_die
= sibling_die (child_die
);
6962 /* Do not consider external references. According to the DWARF standard,
6963 these DIEs are identified by the fact that they have no byte_size
6964 attribute, and a declaration attribute. */
6965 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
6966 || !die_is_declaration (die
, cu
))
6967 new_symbol (die
, this_type
, cu
);
6970 /* Given a DW_AT_enumeration_type die, set its type. We do not
6971 complete the type's fields yet, or create any symbols. */
6973 static struct type
*
6974 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6976 struct objfile
*objfile
= cu
->objfile
;
6978 struct attribute
*attr
;
6981 /* If the definition of this type lives in .debug_types, read that type.
6982 Don't follow DW_AT_specification though, that will take us back up
6983 the chain and we want to go down. */
6984 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6987 struct dwarf2_cu
*type_cu
= cu
;
6988 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6990 type
= read_type_die (type_die
, type_cu
);
6992 /* TYPE_CU may not be the same as CU.
6993 Ensure TYPE is recorded in CU's type_hash table. */
6994 return set_die_type (die
, type
, cu
);
6997 type
= alloc_type (objfile
);
6999 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7000 name
= dwarf2_full_name (NULL
, die
, cu
);
7002 TYPE_TAG_NAME (type
) = (char *) name
;
7004 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7007 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7011 TYPE_LENGTH (type
) = 0;
7014 /* The enumeration DIE can be incomplete. In Ada, any type can be
7015 declared as private in the package spec, and then defined only
7016 inside the package body. Such types are known as Taft Amendment
7017 Types. When another package uses such a type, an incomplete DIE
7018 may be generated by the compiler. */
7019 if (die_is_declaration (die
, cu
))
7020 TYPE_STUB (type
) = 1;
7022 return set_die_type (die
, type
, cu
);
7025 /* Given a pointer to a die which begins an enumeration, process all
7026 the dies that define the members of the enumeration, and create the
7027 symbol for the enumeration type.
7029 NOTE: We reverse the order of the element list. */
7032 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7034 struct type
*this_type
;
7036 this_type
= get_die_type (die
, cu
);
7037 if (this_type
== NULL
)
7038 this_type
= read_enumeration_type (die
, cu
);
7040 if (die
->child
!= NULL
)
7042 struct die_info
*child_die
;
7044 struct field
*fields
= NULL
;
7046 int unsigned_enum
= 1;
7049 child_die
= die
->child
;
7050 while (child_die
&& child_die
->tag
)
7052 if (child_die
->tag
!= DW_TAG_enumerator
)
7054 process_die (child_die
, cu
);
7058 name
= dwarf2_name (child_die
, cu
);
7061 sym
= new_symbol (child_die
, this_type
, cu
);
7062 if (SYMBOL_VALUE (sym
) < 0)
7065 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7067 fields
= (struct field
*)
7069 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7070 * sizeof (struct field
));
7073 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7074 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7075 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7076 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7082 child_die
= sibling_die (child_die
);
7087 TYPE_NFIELDS (this_type
) = num_fields
;
7088 TYPE_FIELDS (this_type
) = (struct field
*)
7089 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7090 memcpy (TYPE_FIELDS (this_type
), fields
,
7091 sizeof (struct field
) * num_fields
);
7095 TYPE_UNSIGNED (this_type
) = 1;
7098 new_symbol (die
, this_type
, cu
);
7101 /* Extract all information from a DW_TAG_array_type DIE and put it in
7102 the DIE's type field. For now, this only handles one dimensional
7105 static struct type
*
7106 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7108 struct objfile
*objfile
= cu
->objfile
;
7109 struct die_info
*child_die
;
7111 struct type
*element_type
, *range_type
, *index_type
;
7112 struct type
**range_types
= NULL
;
7113 struct attribute
*attr
;
7115 struct cleanup
*back_to
;
7118 element_type
= die_type (die
, cu
);
7120 /* The die_type call above may have already set the type for this DIE. */
7121 type
= get_die_type (die
, cu
);
7125 /* Irix 6.2 native cc creates array types without children for
7126 arrays with unspecified length. */
7127 if (die
->child
== NULL
)
7129 index_type
= objfile_type (objfile
)->builtin_int
;
7130 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7131 type
= create_array_type (NULL
, element_type
, range_type
);
7132 return set_die_type (die
, type
, cu
);
7135 back_to
= make_cleanup (null_cleanup
, NULL
);
7136 child_die
= die
->child
;
7137 while (child_die
&& child_die
->tag
)
7139 if (child_die
->tag
== DW_TAG_subrange_type
)
7141 struct type
*child_type
= read_type_die (child_die
, cu
);
7143 if (child_type
!= NULL
)
7145 /* The range type was succesfully read. Save it for
7146 the array type creation. */
7147 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7149 range_types
= (struct type
**)
7150 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7151 * sizeof (struct type
*));
7153 make_cleanup (free_current_contents
, &range_types
);
7155 range_types
[ndim
++] = child_type
;
7158 child_die
= sibling_die (child_die
);
7161 /* Dwarf2 dimensions are output from left to right, create the
7162 necessary array types in backwards order. */
7164 type
= element_type
;
7166 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7171 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7176 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7179 /* Understand Dwarf2 support for vector types (like they occur on
7180 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7181 array type. This is not part of the Dwarf2/3 standard yet, but a
7182 custom vendor extension. The main difference between a regular
7183 array and the vector variant is that vectors are passed by value
7185 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7187 make_vector_type (type
);
7189 name
= dwarf2_name (die
, cu
);
7191 TYPE_NAME (type
) = name
;
7193 /* Install the type in the die. */
7194 set_die_type (die
, type
, cu
);
7196 /* set_die_type should be already done. */
7197 set_descriptive_type (type
, die
, cu
);
7199 do_cleanups (back_to
);
7204 static enum dwarf_array_dim_ordering
7205 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7207 struct attribute
*attr
;
7209 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7211 if (attr
) return DW_SND (attr
);
7214 GNU F77 is a special case, as at 08/2004 array type info is the
7215 opposite order to the dwarf2 specification, but data is still
7216 laid out as per normal fortran.
7218 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7222 if (cu
->language
== language_fortran
7223 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7225 return DW_ORD_row_major
;
7228 switch (cu
->language_defn
->la_array_ordering
)
7230 case array_column_major
:
7231 return DW_ORD_col_major
;
7232 case array_row_major
:
7234 return DW_ORD_row_major
;
7238 /* Extract all information from a DW_TAG_set_type DIE and put it in
7239 the DIE's type field. */
7241 static struct type
*
7242 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7244 struct type
*domain_type
, *set_type
;
7245 struct attribute
*attr
;
7247 domain_type
= die_type (die
, cu
);
7249 /* The die_type call above may have already set the type for this DIE. */
7250 set_type
= get_die_type (die
, cu
);
7254 set_type
= create_set_type (NULL
, domain_type
);
7256 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7258 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7260 return set_die_type (die
, set_type
, cu
);
7263 /* First cut: install each common block member as a global variable. */
7266 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7268 struct die_info
*child_die
;
7269 struct attribute
*attr
;
7271 CORE_ADDR base
= (CORE_ADDR
) 0;
7273 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7276 /* Support the .debug_loc offsets */
7277 if (attr_form_is_block (attr
))
7279 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7281 else if (attr_form_is_section_offset (attr
))
7283 dwarf2_complex_location_expr_complaint ();
7287 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7288 "common block member");
7291 if (die
->child
!= NULL
)
7293 child_die
= die
->child
;
7294 while (child_die
&& child_die
->tag
)
7296 sym
= new_symbol (child_die
, NULL
, cu
);
7297 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7300 CORE_ADDR byte_offset
= 0;
7302 if (attr_form_is_section_offset (attr
))
7303 dwarf2_complex_location_expr_complaint ();
7304 else if (attr_form_is_constant (attr
))
7305 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7306 else if (attr_form_is_block (attr
))
7307 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7309 dwarf2_complex_location_expr_complaint ();
7311 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7312 add_symbol_to_list (sym
, &global_symbols
);
7314 child_die
= sibling_die (child_die
);
7319 /* Create a type for a C++ namespace. */
7321 static struct type
*
7322 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7324 struct objfile
*objfile
= cu
->objfile
;
7325 const char *previous_prefix
, *name
;
7329 /* For extensions, reuse the type of the original namespace. */
7330 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7332 struct die_info
*ext_die
;
7333 struct dwarf2_cu
*ext_cu
= cu
;
7335 ext_die
= dwarf2_extension (die
, &ext_cu
);
7336 type
= read_type_die (ext_die
, ext_cu
);
7338 /* EXT_CU may not be the same as CU.
7339 Ensure TYPE is recorded in CU's type_hash table. */
7340 return set_die_type (die
, type
, cu
);
7343 name
= namespace_name (die
, &is_anonymous
, cu
);
7345 /* Now build the name of the current namespace. */
7347 previous_prefix
= determine_prefix (die
, cu
);
7348 if (previous_prefix
[0] != '\0')
7349 name
= typename_concat (&objfile
->objfile_obstack
,
7350 previous_prefix
, name
, 0, cu
);
7352 /* Create the type. */
7353 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7355 TYPE_NAME (type
) = (char *) name
;
7356 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7358 return set_die_type (die
, type
, cu
);
7361 /* Read a C++ namespace. */
7364 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7366 struct objfile
*objfile
= cu
->objfile
;
7370 /* Add a symbol associated to this if we haven't seen the namespace
7371 before. Also, add a using directive if it's an anonymous
7374 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7378 type
= read_type_die (die
, cu
);
7379 new_symbol (die
, type
, cu
);
7381 name
= namespace_name (die
, &is_anonymous
, cu
);
7384 const char *previous_prefix
= determine_prefix (die
, cu
);
7386 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7387 NULL
, &objfile
->objfile_obstack
);
7391 if (die
->child
!= NULL
)
7393 struct die_info
*child_die
= die
->child
;
7395 while (child_die
&& child_die
->tag
)
7397 process_die (child_die
, cu
);
7398 child_die
= sibling_die (child_die
);
7403 /* Read a Fortran module as type. This DIE can be only a declaration used for
7404 imported module. Still we need that type as local Fortran "use ... only"
7405 declaration imports depend on the created type in determine_prefix. */
7407 static struct type
*
7408 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7410 struct objfile
*objfile
= cu
->objfile
;
7414 module_name
= dwarf2_name (die
, cu
);
7416 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7418 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7420 /* determine_prefix uses TYPE_TAG_NAME. */
7421 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7423 return set_die_type (die
, type
, cu
);
7426 /* Read a Fortran module. */
7429 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7431 struct die_info
*child_die
= die
->child
;
7433 while (child_die
&& child_die
->tag
)
7435 process_die (child_die
, cu
);
7436 child_die
= sibling_die (child_die
);
7440 /* Return the name of the namespace represented by DIE. Set
7441 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7445 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7447 struct die_info
*current_die
;
7448 const char *name
= NULL
;
7450 /* Loop through the extensions until we find a name. */
7452 for (current_die
= die
;
7453 current_die
!= NULL
;
7454 current_die
= dwarf2_extension (die
, &cu
))
7456 name
= dwarf2_name (current_die
, cu
);
7461 /* Is it an anonymous namespace? */
7463 *is_anonymous
= (name
== NULL
);
7465 name
= "(anonymous namespace)";
7470 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7471 the user defined type vector. */
7473 static struct type
*
7474 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7476 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7477 struct comp_unit_head
*cu_header
= &cu
->header
;
7479 struct attribute
*attr_byte_size
;
7480 struct attribute
*attr_address_class
;
7481 int byte_size
, addr_class
;
7482 struct type
*target_type
;
7484 target_type
= die_type (die
, cu
);
7486 /* The die_type call above may have already set the type for this DIE. */
7487 type
= get_die_type (die
, cu
);
7491 type
= lookup_pointer_type (target_type
);
7493 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7495 byte_size
= DW_UNSND (attr_byte_size
);
7497 byte_size
= cu_header
->addr_size
;
7499 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7500 if (attr_address_class
)
7501 addr_class
= DW_UNSND (attr_address_class
);
7503 addr_class
= DW_ADDR_none
;
7505 /* If the pointer size or address class is different than the
7506 default, create a type variant marked as such and set the
7507 length accordingly. */
7508 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7510 if (gdbarch_address_class_type_flags_p (gdbarch
))
7514 type_flags
= gdbarch_address_class_type_flags
7515 (gdbarch
, byte_size
, addr_class
);
7516 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7518 type
= make_type_with_address_space (type
, type_flags
);
7520 else if (TYPE_LENGTH (type
) != byte_size
)
7522 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7526 /* Should we also complain about unhandled address classes? */
7530 TYPE_LENGTH (type
) = byte_size
;
7531 return set_die_type (die
, type
, cu
);
7534 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7535 the user defined type vector. */
7537 static struct type
*
7538 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7541 struct type
*to_type
;
7542 struct type
*domain
;
7544 to_type
= die_type (die
, cu
);
7545 domain
= die_containing_type (die
, cu
);
7547 /* The calls above may have already set the type for this DIE. */
7548 type
= get_die_type (die
, cu
);
7552 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7553 type
= lookup_methodptr_type (to_type
);
7555 type
= lookup_memberptr_type (to_type
, domain
);
7557 return set_die_type (die
, type
, cu
);
7560 /* Extract all information from a DW_TAG_reference_type DIE and add to
7561 the user defined type vector. */
7563 static struct type
*
7564 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7566 struct comp_unit_head
*cu_header
= &cu
->header
;
7567 struct type
*type
, *target_type
;
7568 struct attribute
*attr
;
7570 target_type
= die_type (die
, cu
);
7572 /* The die_type call above may have already set the type for this DIE. */
7573 type
= get_die_type (die
, cu
);
7577 type
= lookup_reference_type (target_type
);
7578 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7581 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7585 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7587 return set_die_type (die
, type
, cu
);
7590 static struct type
*
7591 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7593 struct type
*base_type
, *cv_type
;
7595 base_type
= die_type (die
, cu
);
7597 /* The die_type call above may have already set the type for this DIE. */
7598 cv_type
= get_die_type (die
, cu
);
7602 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7603 return set_die_type (die
, cv_type
, cu
);
7606 static struct type
*
7607 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7609 struct type
*base_type
, *cv_type
;
7611 base_type
= die_type (die
, cu
);
7613 /* The die_type call above may have already set the type for this DIE. */
7614 cv_type
= get_die_type (die
, cu
);
7618 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7619 return set_die_type (die
, cv_type
, cu
);
7622 /* Extract all information from a DW_TAG_string_type DIE and add to
7623 the user defined type vector. It isn't really a user defined type,
7624 but it behaves like one, with other DIE's using an AT_user_def_type
7625 attribute to reference it. */
7627 static struct type
*
7628 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7630 struct objfile
*objfile
= cu
->objfile
;
7631 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7632 struct type
*type
, *range_type
, *index_type
, *char_type
;
7633 struct attribute
*attr
;
7634 unsigned int length
;
7636 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7639 length
= DW_UNSND (attr
);
7643 /* check for the DW_AT_byte_size attribute */
7644 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7647 length
= DW_UNSND (attr
);
7655 index_type
= objfile_type (objfile
)->builtin_int
;
7656 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7657 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7658 type
= create_string_type (NULL
, char_type
, range_type
);
7660 return set_die_type (die
, type
, cu
);
7663 /* Handle DIES due to C code like:
7667 int (*funcp)(int a, long l);
7671 ('funcp' generates a DW_TAG_subroutine_type DIE)
7674 static struct type
*
7675 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7677 struct type
*type
; /* Type that this function returns */
7678 struct type
*ftype
; /* Function that returns above type */
7679 struct attribute
*attr
;
7681 type
= die_type (die
, cu
);
7683 /* The die_type call above may have already set the type for this DIE. */
7684 ftype
= get_die_type (die
, cu
);
7688 ftype
= lookup_function_type (type
);
7690 /* All functions in C++, Pascal and Java have prototypes. */
7691 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7692 if ((attr
&& (DW_UNSND (attr
) != 0))
7693 || cu
->language
== language_cplus
7694 || cu
->language
== language_java
7695 || cu
->language
== language_pascal
)
7696 TYPE_PROTOTYPED (ftype
) = 1;
7697 else if (producer_is_realview (cu
->producer
))
7698 /* RealView does not emit DW_AT_prototyped. We can not
7699 distinguish prototyped and unprototyped functions; default to
7700 prototyped, since that is more common in modern code (and
7701 RealView warns about unprototyped functions). */
7702 TYPE_PROTOTYPED (ftype
) = 1;
7704 /* Store the calling convention in the type if it's available in
7705 the subroutine die. Otherwise set the calling convention to
7706 the default value DW_CC_normal. */
7707 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7708 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7710 /* We need to add the subroutine type to the die immediately so
7711 we don't infinitely recurse when dealing with parameters
7712 declared as the same subroutine type. */
7713 set_die_type (die
, ftype
, cu
);
7715 if (die
->child
!= NULL
)
7717 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7718 struct die_info
*child_die
;
7719 int nparams
, iparams
;
7721 /* Count the number of parameters.
7722 FIXME: GDB currently ignores vararg functions, but knows about
7723 vararg member functions. */
7725 child_die
= die
->child
;
7726 while (child_die
&& child_die
->tag
)
7728 if (child_die
->tag
== DW_TAG_formal_parameter
)
7730 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7731 TYPE_VARARGS (ftype
) = 1;
7732 child_die
= sibling_die (child_die
);
7735 /* Allocate storage for parameters and fill them in. */
7736 TYPE_NFIELDS (ftype
) = nparams
;
7737 TYPE_FIELDS (ftype
) = (struct field
*)
7738 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7740 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7741 even if we error out during the parameters reading below. */
7742 for (iparams
= 0; iparams
< nparams
; iparams
++)
7743 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7746 child_die
= die
->child
;
7747 while (child_die
&& child_die
->tag
)
7749 if (child_die
->tag
== DW_TAG_formal_parameter
)
7751 struct type
*arg_type
;
7753 /* DWARF version 2 has no clean way to discern C++
7754 static and non-static member functions. G++ helps
7755 GDB by marking the first parameter for non-static
7756 member functions (which is the this pointer) as
7757 artificial. We pass this information to
7758 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7760 DWARF version 3 added DW_AT_object_pointer, which GCC
7761 4.5 does not yet generate. */
7762 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7764 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7767 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7769 /* GCC/43521: In java, the formal parameter
7770 "this" is sometimes not marked with DW_AT_artificial. */
7771 if (cu
->language
== language_java
)
7773 const char *name
= dwarf2_name (child_die
, cu
);
7775 if (name
&& !strcmp (name
, "this"))
7776 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7779 arg_type
= die_type (child_die
, cu
);
7781 /* RealView does not mark THIS as const, which the testsuite
7782 expects. GCC marks THIS as const in method definitions,
7783 but not in the class specifications (GCC PR 43053). */
7784 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7785 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7788 struct dwarf2_cu
*arg_cu
= cu
;
7789 const char *name
= dwarf2_name (child_die
, cu
);
7791 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7794 /* If the compiler emits this, use it. */
7795 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7798 else if (name
&& strcmp (name
, "this") == 0)
7799 /* Function definitions will have the argument names. */
7801 else if (name
== NULL
&& iparams
== 0)
7802 /* Declarations may not have the names, so like
7803 elsewhere in GDB, assume an artificial first
7804 argument is "this". */
7808 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7812 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7815 child_die
= sibling_die (child_die
);
7822 static struct type
*
7823 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7825 struct objfile
*objfile
= cu
->objfile
;
7826 const char *name
= NULL
;
7827 struct type
*this_type
;
7829 name
= dwarf2_full_name (NULL
, die
, cu
);
7830 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7831 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7832 TYPE_NAME (this_type
) = (char *) name
;
7833 set_die_type (die
, this_type
, cu
);
7834 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7838 /* Find a representation of a given base type and install
7839 it in the TYPE field of the die. */
7841 static struct type
*
7842 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7844 struct objfile
*objfile
= cu
->objfile
;
7846 struct attribute
*attr
;
7847 int encoding
= 0, size
= 0;
7849 enum type_code code
= TYPE_CODE_INT
;
7851 struct type
*target_type
= NULL
;
7853 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7856 encoding
= DW_UNSND (attr
);
7858 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7861 size
= DW_UNSND (attr
);
7863 name
= dwarf2_name (die
, cu
);
7866 complaint (&symfile_complaints
,
7867 _("DW_AT_name missing from DW_TAG_base_type"));
7872 case DW_ATE_address
:
7873 /* Turn DW_ATE_address into a void * pointer. */
7874 code
= TYPE_CODE_PTR
;
7875 type_flags
|= TYPE_FLAG_UNSIGNED
;
7876 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7878 case DW_ATE_boolean
:
7879 code
= TYPE_CODE_BOOL
;
7880 type_flags
|= TYPE_FLAG_UNSIGNED
;
7882 case DW_ATE_complex_float
:
7883 code
= TYPE_CODE_COMPLEX
;
7884 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7886 case DW_ATE_decimal_float
:
7887 code
= TYPE_CODE_DECFLOAT
;
7890 code
= TYPE_CODE_FLT
;
7894 case DW_ATE_unsigned
:
7895 type_flags
|= TYPE_FLAG_UNSIGNED
;
7897 case DW_ATE_signed_char
:
7898 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7899 || cu
->language
== language_pascal
)
7900 code
= TYPE_CODE_CHAR
;
7902 case DW_ATE_unsigned_char
:
7903 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7904 || cu
->language
== language_pascal
)
7905 code
= TYPE_CODE_CHAR
;
7906 type_flags
|= TYPE_FLAG_UNSIGNED
;
7909 /* We just treat this as an integer and then recognize the
7910 type by name elsewhere. */
7914 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7915 dwarf_type_encoding_name (encoding
));
7919 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7920 TYPE_NAME (type
) = name
;
7921 TYPE_TARGET_TYPE (type
) = target_type
;
7923 if (name
&& strcmp (name
, "char") == 0)
7924 TYPE_NOSIGN (type
) = 1;
7926 return set_die_type (die
, type
, cu
);
7929 /* Read the given DW_AT_subrange DIE. */
7931 static struct type
*
7932 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7934 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7935 struct type
*base_type
;
7936 struct type
*range_type
;
7937 struct attribute
*attr
;
7941 LONGEST negative_mask
;
7943 base_type
= die_type (die
, cu
);
7944 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7945 check_typedef (base_type
);
7947 /* The die_type call above may have already set the type for this DIE. */
7948 range_type
= get_die_type (die
, cu
);
7952 if (cu
->language
== language_fortran
)
7954 /* FORTRAN implies a lower bound of 1, if not given. */
7958 /* FIXME: For variable sized arrays either of these could be
7959 a variable rather than a constant value. We'll allow it,
7960 but we don't know how to handle it. */
7961 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
7963 low
= dwarf2_get_attr_constant_value (attr
, 0);
7965 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
7968 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
7970 /* GCC encodes arrays with unspecified or dynamic length
7971 with a DW_FORM_block1 attribute or a reference attribute.
7972 FIXME: GDB does not yet know how to handle dynamic
7973 arrays properly, treat them as arrays with unspecified
7976 FIXME: jimb/2003-09-22: GDB does not really know
7977 how to handle arrays of unspecified length
7978 either; we just represent them as zero-length
7979 arrays. Choose an appropriate upper bound given
7980 the lower bound we've computed above. */
7984 high
= dwarf2_get_attr_constant_value (attr
, 1);
7988 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
7991 int count
= dwarf2_get_attr_constant_value (attr
, 1);
7992 high
= low
+ count
- 1;
7996 /* Dwarf-2 specifications explicitly allows to create subrange types
7997 without specifying a base type.
7998 In that case, the base type must be set to the type of
7999 the lower bound, upper bound or count, in that order, if any of these
8000 three attributes references an object that has a type.
8001 If no base type is found, the Dwarf-2 specifications say that
8002 a signed integer type of size equal to the size of an address should
8004 For the following C code: `extern char gdb_int [];'
8005 GCC produces an empty range DIE.
8006 FIXME: muller/2010-05-28: Possible references to object for low bound,
8007 high bound or count are not yet handled by this code.
8009 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8011 struct objfile
*objfile
= cu
->objfile
;
8012 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8013 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8014 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8016 /* Test "int", "long int", and "long long int" objfile types,
8017 and select the first one having a size above or equal to the
8018 architecture address size. */
8019 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8020 base_type
= int_type
;
8023 int_type
= objfile_type (objfile
)->builtin_long
;
8024 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8025 base_type
= int_type
;
8028 int_type
= objfile_type (objfile
)->builtin_long_long
;
8029 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8030 base_type
= int_type
;
8036 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8037 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8038 low
|= negative_mask
;
8039 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8040 high
|= negative_mask
;
8042 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8044 /* Mark arrays with dynamic length at least as an array of unspecified
8045 length. GDB could check the boundary but before it gets implemented at
8046 least allow accessing the array elements. */
8047 if (attr
&& attr
->form
== DW_FORM_block1
)
8048 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8050 name
= dwarf2_name (die
, cu
);
8052 TYPE_NAME (range_type
) = name
;
8054 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8056 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8058 set_die_type (die
, range_type
, cu
);
8060 /* set_die_type should be already done. */
8061 set_descriptive_type (range_type
, die
, cu
);
8066 static struct type
*
8067 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8071 /* For now, we only support the C meaning of an unspecified type: void. */
8073 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8074 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8076 return set_die_type (die
, type
, cu
);
8079 /* Trivial hash function for die_info: the hash value of a DIE
8080 is its offset in .debug_info for this objfile. */
8083 die_hash (const void *item
)
8085 const struct die_info
*die
= item
;
8090 /* Trivial comparison function for die_info structures: two DIEs
8091 are equal if they have the same offset. */
8094 die_eq (const void *item_lhs
, const void *item_rhs
)
8096 const struct die_info
*die_lhs
= item_lhs
;
8097 const struct die_info
*die_rhs
= item_rhs
;
8099 return die_lhs
->offset
== die_rhs
->offset
;
8102 /* Read a whole compilation unit into a linked list of dies. */
8104 static struct die_info
*
8105 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8107 struct die_reader_specs reader_specs
;
8108 int read_abbrevs
= 0;
8109 struct cleanup
*back_to
= NULL
;
8110 struct die_info
*die
;
8112 if (cu
->dwarf2_abbrevs
== NULL
)
8114 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8115 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8119 gdb_assert (cu
->die_hash
== NULL
);
8121 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8125 &cu
->comp_unit_obstack
,
8126 hashtab_obstack_allocate
,
8127 dummy_obstack_deallocate
);
8129 init_cu_die_reader (&reader_specs
, cu
);
8131 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8134 do_cleanups (back_to
);
8139 /* Main entry point for reading a DIE and all children.
8140 Read the DIE and dump it if requested. */
8142 static struct die_info
*
8143 read_die_and_children (const struct die_reader_specs
*reader
,
8145 gdb_byte
**new_info_ptr
,
8146 struct die_info
*parent
)
8148 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8149 new_info_ptr
, parent
);
8151 if (dwarf2_die_debug
)
8153 fprintf_unfiltered (gdb_stdlog
,
8154 "\nRead die from %s of %s:\n",
8155 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8157 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8159 : "unknown section",
8160 reader
->abfd
->filename
);
8161 dump_die (result
, dwarf2_die_debug
);
8167 /* Read a single die and all its descendents. Set the die's sibling
8168 field to NULL; set other fields in the die correctly, and set all
8169 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8170 location of the info_ptr after reading all of those dies. PARENT
8171 is the parent of the die in question. */
8173 static struct die_info
*
8174 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8176 gdb_byte
**new_info_ptr
,
8177 struct die_info
*parent
)
8179 struct die_info
*die
;
8183 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8186 *new_info_ptr
= cur_ptr
;
8189 store_in_ref_table (die
, reader
->cu
);
8192 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8196 *new_info_ptr
= cur_ptr
;
8199 die
->sibling
= NULL
;
8200 die
->parent
= parent
;
8204 /* Read a die, all of its descendents, and all of its siblings; set
8205 all of the fields of all of the dies correctly. Arguments are as
8206 in read_die_and_children. */
8208 static struct die_info
*
8209 read_die_and_siblings (const struct die_reader_specs
*reader
,
8211 gdb_byte
**new_info_ptr
,
8212 struct die_info
*parent
)
8214 struct die_info
*first_die
, *last_sibling
;
8218 first_die
= last_sibling
= NULL
;
8222 struct die_info
*die
8223 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8227 *new_info_ptr
= cur_ptr
;
8234 last_sibling
->sibling
= die
;
8240 /* Read the die from the .debug_info section buffer. Set DIEP to
8241 point to a newly allocated die with its information, except for its
8242 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8243 whether the die has children or not. */
8246 read_full_die (const struct die_reader_specs
*reader
,
8247 struct die_info
**diep
, gdb_byte
*info_ptr
,
8250 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8251 struct abbrev_info
*abbrev
;
8252 struct die_info
*die
;
8253 struct dwarf2_cu
*cu
= reader
->cu
;
8254 bfd
*abfd
= reader
->abfd
;
8256 offset
= info_ptr
- reader
->buffer
;
8257 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8258 info_ptr
+= bytes_read
;
8266 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8268 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8270 bfd_get_filename (abfd
));
8272 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8273 die
->offset
= offset
;
8274 die
->tag
= abbrev
->tag
;
8275 die
->abbrev
= abbrev_number
;
8277 die
->num_attrs
= abbrev
->num_attrs
;
8279 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8280 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8281 abfd
, info_ptr
, cu
);
8284 *has_children
= abbrev
->has_children
;
8288 /* In DWARF version 2, the description of the debugging information is
8289 stored in a separate .debug_abbrev section. Before we read any
8290 dies from a section we read in all abbreviations and install them
8291 in a hash table. This function also sets flags in CU describing
8292 the data found in the abbrev table. */
8295 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8297 struct comp_unit_head
*cu_header
= &cu
->header
;
8298 gdb_byte
*abbrev_ptr
;
8299 struct abbrev_info
*cur_abbrev
;
8300 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8301 unsigned int abbrev_form
, hash_number
;
8302 struct attr_abbrev
*cur_attrs
;
8303 unsigned int allocated_attrs
;
8305 /* Initialize dwarf2 abbrevs */
8306 obstack_init (&cu
->abbrev_obstack
);
8307 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8309 * sizeof (struct abbrev_info
*)));
8310 memset (cu
->dwarf2_abbrevs
, 0,
8311 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8313 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8314 &dwarf2_per_objfile
->abbrev
);
8315 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8316 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8317 abbrev_ptr
+= bytes_read
;
8319 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8320 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8322 /* loop until we reach an abbrev number of 0 */
8323 while (abbrev_number
)
8325 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8327 /* read in abbrev header */
8328 cur_abbrev
->number
= abbrev_number
;
8329 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8330 abbrev_ptr
+= bytes_read
;
8331 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8334 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8335 cu
->has_namespace_info
= 1;
8337 /* now read in declarations */
8338 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8339 abbrev_ptr
+= bytes_read
;
8340 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8341 abbrev_ptr
+= bytes_read
;
8344 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8346 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8348 = xrealloc (cur_attrs
, (allocated_attrs
8349 * sizeof (struct attr_abbrev
)));
8352 /* Record whether this compilation unit might have
8353 inter-compilation-unit references. If we don't know what form
8354 this attribute will have, then it might potentially be a
8355 DW_FORM_ref_addr, so we conservatively expect inter-CU
8358 if (abbrev_form
== DW_FORM_ref_addr
8359 || abbrev_form
== DW_FORM_indirect
)
8360 cu
->has_form_ref_addr
= 1;
8362 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8363 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8364 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8365 abbrev_ptr
+= bytes_read
;
8366 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8367 abbrev_ptr
+= bytes_read
;
8370 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8371 (cur_abbrev
->num_attrs
8372 * sizeof (struct attr_abbrev
)));
8373 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8374 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8376 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8377 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8378 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8380 /* Get next abbreviation.
8381 Under Irix6 the abbreviations for a compilation unit are not
8382 always properly terminated with an abbrev number of 0.
8383 Exit loop if we encounter an abbreviation which we have
8384 already read (which means we are about to read the abbreviations
8385 for the next compile unit) or if the end of the abbreviation
8386 table is reached. */
8387 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8388 >= dwarf2_per_objfile
->abbrev
.size
)
8390 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8391 abbrev_ptr
+= bytes_read
;
8392 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8399 /* Release the memory used by the abbrev table for a compilation unit. */
8402 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8404 struct dwarf2_cu
*cu
= ptr_to_cu
;
8406 obstack_free (&cu
->abbrev_obstack
, NULL
);
8407 cu
->dwarf2_abbrevs
= NULL
;
8410 /* Lookup an abbrev_info structure in the abbrev hash table. */
8412 static struct abbrev_info
*
8413 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8415 unsigned int hash_number
;
8416 struct abbrev_info
*abbrev
;
8418 hash_number
= number
% ABBREV_HASH_SIZE
;
8419 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8423 if (abbrev
->number
== number
)
8426 abbrev
= abbrev
->next
;
8431 /* Returns nonzero if TAG represents a type that we might generate a partial
8435 is_type_tag_for_partial (int tag
)
8440 /* Some types that would be reasonable to generate partial symbols for,
8441 that we don't at present. */
8442 case DW_TAG_array_type
:
8443 case DW_TAG_file_type
:
8444 case DW_TAG_ptr_to_member_type
:
8445 case DW_TAG_set_type
:
8446 case DW_TAG_string_type
:
8447 case DW_TAG_subroutine_type
:
8449 case DW_TAG_base_type
:
8450 case DW_TAG_class_type
:
8451 case DW_TAG_interface_type
:
8452 case DW_TAG_enumeration_type
:
8453 case DW_TAG_structure_type
:
8454 case DW_TAG_subrange_type
:
8455 case DW_TAG_typedef
:
8456 case DW_TAG_union_type
:
8463 /* Load all DIEs that are interesting for partial symbols into memory. */
8465 static struct partial_die_info
*
8466 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8467 int building_psymtab
, struct dwarf2_cu
*cu
)
8469 struct partial_die_info
*part_die
;
8470 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8471 struct abbrev_info
*abbrev
;
8472 unsigned int bytes_read
;
8473 unsigned int load_all
= 0;
8475 int nesting_level
= 1;
8480 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8484 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8488 &cu
->comp_unit_obstack
,
8489 hashtab_obstack_allocate
,
8490 dummy_obstack_deallocate
);
8492 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8493 sizeof (struct partial_die_info
));
8497 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8499 /* A NULL abbrev means the end of a series of children. */
8502 if (--nesting_level
== 0)
8504 /* PART_DIE was probably the last thing allocated on the
8505 comp_unit_obstack, so we could call obstack_free
8506 here. We don't do that because the waste is small,
8507 and will be cleaned up when we're done with this
8508 compilation unit. This way, we're also more robust
8509 against other users of the comp_unit_obstack. */
8512 info_ptr
+= bytes_read
;
8513 last_die
= parent_die
;
8514 parent_die
= parent_die
->die_parent
;
8518 /* Check for template arguments. We never save these; if
8519 they're seen, we just mark the parent, and go on our way. */
8520 if (parent_die
!= NULL
8521 && cu
->language
== language_cplus
8522 && (abbrev
->tag
== DW_TAG_template_type_param
8523 || abbrev
->tag
== DW_TAG_template_value_param
))
8525 parent_die
->has_template_arguments
= 1;
8529 /* We don't need a partial DIE for the template argument. */
8530 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8536 /* We only recurse into subprograms looking for template arguments.
8537 Skip their other children. */
8539 && cu
->language
== language_cplus
8540 && parent_die
!= NULL
8541 && parent_die
->tag
== DW_TAG_subprogram
)
8543 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8547 /* Check whether this DIE is interesting enough to save. Normally
8548 we would not be interested in members here, but there may be
8549 later variables referencing them via DW_AT_specification (for
8552 && !is_type_tag_for_partial (abbrev
->tag
)
8553 && abbrev
->tag
!= DW_TAG_enumerator
8554 && abbrev
->tag
!= DW_TAG_subprogram
8555 && abbrev
->tag
!= DW_TAG_lexical_block
8556 && abbrev
->tag
!= DW_TAG_variable
8557 && abbrev
->tag
!= DW_TAG_namespace
8558 && abbrev
->tag
!= DW_TAG_module
8559 && abbrev
->tag
!= DW_TAG_member
)
8561 /* Otherwise we skip to the next sibling, if any. */
8562 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8566 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8567 buffer
, info_ptr
, cu
);
8569 /* This two-pass algorithm for processing partial symbols has a
8570 high cost in cache pressure. Thus, handle some simple cases
8571 here which cover the majority of C partial symbols. DIEs
8572 which neither have specification tags in them, nor could have
8573 specification tags elsewhere pointing at them, can simply be
8574 processed and discarded.
8576 This segment is also optional; scan_partial_symbols and
8577 add_partial_symbol will handle these DIEs if we chain
8578 them in normally. When compilers which do not emit large
8579 quantities of duplicate debug information are more common,
8580 this code can probably be removed. */
8582 /* Any complete simple types at the top level (pretty much all
8583 of them, for a language without namespaces), can be processed
8585 if (parent_die
== NULL
8586 && part_die
->has_specification
== 0
8587 && part_die
->is_declaration
== 0
8588 && (part_die
->tag
== DW_TAG_typedef
8589 || part_die
->tag
== DW_TAG_base_type
8590 || part_die
->tag
== DW_TAG_subrange_type
))
8592 if (building_psymtab
&& part_die
->name
!= NULL
)
8593 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8594 VAR_DOMAIN
, LOC_TYPEDEF
,
8595 &cu
->objfile
->static_psymbols
,
8596 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8597 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8601 /* If we're at the second level, and we're an enumerator, and
8602 our parent has no specification (meaning possibly lives in a
8603 namespace elsewhere), then we can add the partial symbol now
8604 instead of queueing it. */
8605 if (part_die
->tag
== DW_TAG_enumerator
8606 && parent_die
!= NULL
8607 && parent_die
->die_parent
== NULL
8608 && parent_die
->tag
== DW_TAG_enumeration_type
8609 && parent_die
->has_specification
== 0)
8611 if (part_die
->name
== NULL
)
8612 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8613 else if (building_psymtab
)
8614 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8615 VAR_DOMAIN
, LOC_CONST
,
8616 (cu
->language
== language_cplus
8617 || cu
->language
== language_java
)
8618 ? &cu
->objfile
->global_psymbols
8619 : &cu
->objfile
->static_psymbols
,
8620 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8622 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8626 /* We'll save this DIE so link it in. */
8627 part_die
->die_parent
= parent_die
;
8628 part_die
->die_sibling
= NULL
;
8629 part_die
->die_child
= NULL
;
8631 if (last_die
&& last_die
== parent_die
)
8632 last_die
->die_child
= part_die
;
8634 last_die
->die_sibling
= part_die
;
8636 last_die
= part_die
;
8638 if (first_die
== NULL
)
8639 first_die
= part_die
;
8641 /* Maybe add the DIE to the hash table. Not all DIEs that we
8642 find interesting need to be in the hash table, because we
8643 also have the parent/sibling/child chains; only those that we
8644 might refer to by offset later during partial symbol reading.
8646 For now this means things that might have be the target of a
8647 DW_AT_specification, DW_AT_abstract_origin, or
8648 DW_AT_extension. DW_AT_extension will refer only to
8649 namespaces; DW_AT_abstract_origin refers to functions (and
8650 many things under the function DIE, but we do not recurse
8651 into function DIEs during partial symbol reading) and
8652 possibly variables as well; DW_AT_specification refers to
8653 declarations. Declarations ought to have the DW_AT_declaration
8654 flag. It happens that GCC forgets to put it in sometimes, but
8655 only for functions, not for types.
8657 Adding more things than necessary to the hash table is harmless
8658 except for the performance cost. Adding too few will result in
8659 wasted time in find_partial_die, when we reread the compilation
8660 unit with load_all_dies set. */
8663 || abbrev
->tag
== DW_TAG_subprogram
8664 || abbrev
->tag
== DW_TAG_variable
8665 || abbrev
->tag
== DW_TAG_namespace
8666 || part_die
->is_declaration
)
8670 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8671 part_die
->offset
, INSERT
);
8675 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8676 sizeof (struct partial_die_info
));
8678 /* For some DIEs we want to follow their children (if any). For C
8679 we have no reason to follow the children of structures; for other
8680 languages we have to, so that we can get at method physnames
8681 to infer fully qualified class names, for DW_AT_specification,
8682 and for C++ template arguments. For C++, we also look one level
8683 inside functions to find template arguments (if the name of the
8684 function does not already contain the template arguments).
8686 For Ada, we need to scan the children of subprograms and lexical
8687 blocks as well because Ada allows the definition of nested
8688 entities that could be interesting for the debugger, such as
8689 nested subprograms for instance. */
8690 if (last_die
->has_children
8692 || last_die
->tag
== DW_TAG_namespace
8693 || last_die
->tag
== DW_TAG_module
8694 || last_die
->tag
== DW_TAG_enumeration_type
8695 || (cu
->language
== language_cplus
8696 && last_die
->tag
== DW_TAG_subprogram
8697 && (last_die
->name
== NULL
8698 || strchr (last_die
->name
, '<') == NULL
))
8699 || (cu
->language
!= language_c
8700 && (last_die
->tag
== DW_TAG_class_type
8701 || last_die
->tag
== DW_TAG_interface_type
8702 || last_die
->tag
== DW_TAG_structure_type
8703 || last_die
->tag
== DW_TAG_union_type
))
8704 || (cu
->language
== language_ada
8705 && (last_die
->tag
== DW_TAG_subprogram
8706 || last_die
->tag
== DW_TAG_lexical_block
))))
8709 parent_die
= last_die
;
8713 /* Otherwise we skip to the next sibling, if any. */
8714 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8716 /* Back to the top, do it again. */
8720 /* Read a minimal amount of information into the minimal die structure. */
8723 read_partial_die (struct partial_die_info
*part_die
,
8724 struct abbrev_info
*abbrev
,
8725 unsigned int abbrev_len
, bfd
*abfd
,
8726 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8727 struct dwarf2_cu
*cu
)
8730 struct attribute attr
;
8731 int has_low_pc_attr
= 0;
8732 int has_high_pc_attr
= 0;
8734 memset (part_die
, 0, sizeof (struct partial_die_info
));
8736 part_die
->offset
= info_ptr
- buffer
;
8738 info_ptr
+= abbrev_len
;
8743 part_die
->tag
= abbrev
->tag
;
8744 part_die
->has_children
= abbrev
->has_children
;
8746 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8748 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8750 /* Store the data if it is of an attribute we want to keep in a
8751 partial symbol table. */
8755 switch (part_die
->tag
)
8757 case DW_TAG_compile_unit
:
8758 case DW_TAG_type_unit
:
8759 /* Compilation units have a DW_AT_name that is a filename, not
8760 a source language identifier. */
8761 case DW_TAG_enumeration_type
:
8762 case DW_TAG_enumerator
:
8763 /* These tags always have simple identifiers already; no need
8764 to canonicalize them. */
8765 part_die
->name
= DW_STRING (&attr
);
8769 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8770 &cu
->objfile
->objfile_obstack
);
8774 case DW_AT_linkage_name
:
8775 case DW_AT_MIPS_linkage_name
:
8776 /* Note that both forms of linkage name might appear. We
8777 assume they will be the same, and we only store the last
8779 if (cu
->language
== language_ada
)
8780 part_die
->name
= DW_STRING (&attr
);
8783 has_low_pc_attr
= 1;
8784 part_die
->lowpc
= DW_ADDR (&attr
);
8787 has_high_pc_attr
= 1;
8788 part_die
->highpc
= DW_ADDR (&attr
);
8790 case DW_AT_location
:
8791 /* Support the .debug_loc offsets */
8792 if (attr_form_is_block (&attr
))
8794 part_die
->locdesc
= DW_BLOCK (&attr
);
8796 else if (attr_form_is_section_offset (&attr
))
8798 dwarf2_complex_location_expr_complaint ();
8802 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8803 "partial symbol information");
8806 case DW_AT_external
:
8807 part_die
->is_external
= DW_UNSND (&attr
);
8809 case DW_AT_declaration
:
8810 part_die
->is_declaration
= DW_UNSND (&attr
);
8813 part_die
->has_type
= 1;
8815 case DW_AT_abstract_origin
:
8816 case DW_AT_specification
:
8817 case DW_AT_extension
:
8818 part_die
->has_specification
= 1;
8819 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8822 /* Ignore absolute siblings, they might point outside of
8823 the current compile unit. */
8824 if (attr
.form
== DW_FORM_ref_addr
)
8825 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8827 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8829 case DW_AT_byte_size
:
8830 part_die
->has_byte_size
= 1;
8832 case DW_AT_calling_convention
:
8833 /* DWARF doesn't provide a way to identify a program's source-level
8834 entry point. DW_AT_calling_convention attributes are only meant
8835 to describe functions' calling conventions.
8837 However, because it's a necessary piece of information in
8838 Fortran, and because DW_CC_program is the only piece of debugging
8839 information whose definition refers to a 'main program' at all,
8840 several compilers have begun marking Fortran main programs with
8841 DW_CC_program --- even when those functions use the standard
8842 calling conventions.
8844 So until DWARF specifies a way to provide this information and
8845 compilers pick up the new representation, we'll support this
8847 if (DW_UNSND (&attr
) == DW_CC_program
8848 && cu
->language
== language_fortran
)
8849 set_main_name (part_die
->name
);
8856 /* When using the GNU linker, .gnu.linkonce. sections are used to
8857 eliminate duplicate copies of functions and vtables and such.
8858 The linker will arbitrarily choose one and discard the others.
8859 The AT_*_pc values for such functions refer to local labels in
8860 these sections. If the section from that file was discarded, the
8861 labels are not in the output, so the relocs get a value of 0.
8862 If this is a discarded function, mark the pc bounds as invalid,
8863 so that GDB will ignore it. */
8864 if (has_low_pc_attr
&& has_high_pc_attr
8865 && part_die
->lowpc
< part_die
->highpc
8866 && (part_die
->lowpc
!= 0
8867 || dwarf2_per_objfile
->has_section_at_zero
))
8868 part_die
->has_pc_info
= 1;
8873 /* Find a cached partial DIE at OFFSET in CU. */
8875 static struct partial_die_info
*
8876 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8878 struct partial_die_info
*lookup_die
= NULL
;
8879 struct partial_die_info part_die
;
8881 part_die
.offset
= offset
;
8882 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8887 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8888 except in the case of .debug_types DIEs which do not reference
8889 outside their CU (they do however referencing other types via
8892 static struct partial_die_info
*
8893 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8895 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8896 struct partial_die_info
*pd
= NULL
;
8898 if (cu
->per_cu
->from_debug_types
)
8900 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8906 if (offset_in_cu_p (&cu
->header
, offset
))
8908 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8913 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8915 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8916 load_partial_comp_unit (per_cu
, cu
->objfile
);
8918 per_cu
->cu
->last_used
= 0;
8919 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8921 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8923 struct cleanup
*back_to
;
8924 struct partial_die_info comp_unit_die
;
8925 struct abbrev_info
*abbrev
;
8926 unsigned int bytes_read
;
8929 per_cu
->load_all_dies
= 1;
8931 /* Re-read the DIEs. */
8932 back_to
= make_cleanup (null_cleanup
, 0);
8933 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8935 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8936 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8938 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8939 + per_cu
->cu
->header
.offset
8940 + per_cu
->cu
->header
.first_die_offset
);
8941 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8942 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8943 per_cu
->cu
->objfile
->obfd
,
8944 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8946 if (comp_unit_die
.has_children
)
8947 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
8948 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8950 do_cleanups (back_to
);
8952 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8958 internal_error (__FILE__
, __LINE__
,
8959 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8960 offset
, bfd_get_filename (cu
->objfile
->obfd
));
8964 /* Adjust PART_DIE before generating a symbol for it. This function
8965 may set the is_external flag or change the DIE's name. */
8968 fixup_partial_die (struct partial_die_info
*part_die
,
8969 struct dwarf2_cu
*cu
)
8971 /* If we found a reference attribute and the DIE has no name, try
8972 to find a name in the referred to DIE. */
8974 if (part_die
->name
== NULL
&& part_die
->has_specification
)
8976 struct partial_die_info
*spec_die
;
8978 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
8980 fixup_partial_die (spec_die
, cu
);
8984 part_die
->name
= spec_die
->name
;
8986 /* Copy DW_AT_external attribute if it is set. */
8987 if (spec_die
->is_external
)
8988 part_die
->is_external
= spec_die
->is_external
;
8992 /* Set default names for some unnamed DIEs. */
8993 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
8994 || part_die
->tag
== DW_TAG_class_type
))
8995 part_die
->name
= "(anonymous class)";
8997 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
8998 part_die
->name
= "(anonymous namespace)";
9000 if (part_die
->tag
== DW_TAG_structure_type
9001 || part_die
->tag
== DW_TAG_class_type
9002 || part_die
->tag
== DW_TAG_union_type
)
9003 guess_structure_name (part_die
, cu
);
9006 /* Read an attribute value described by an attribute form. */
9009 read_attribute_value (struct attribute
*attr
, unsigned form
,
9010 bfd
*abfd
, gdb_byte
*info_ptr
,
9011 struct dwarf2_cu
*cu
)
9013 struct comp_unit_head
*cu_header
= &cu
->header
;
9014 unsigned int bytes_read
;
9015 struct dwarf_block
*blk
;
9020 case DW_FORM_ref_addr
:
9021 if (cu
->header
.version
== 2)
9022 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9024 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9025 info_ptr
+= bytes_read
;
9028 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9029 info_ptr
+= bytes_read
;
9031 case DW_FORM_block2
:
9032 blk
= dwarf_alloc_block (cu
);
9033 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9035 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9036 info_ptr
+= blk
->size
;
9037 DW_BLOCK (attr
) = blk
;
9039 case DW_FORM_block4
:
9040 blk
= dwarf_alloc_block (cu
);
9041 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9043 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9044 info_ptr
+= blk
->size
;
9045 DW_BLOCK (attr
) = blk
;
9048 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9052 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9056 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9059 case DW_FORM_sec_offset
:
9060 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9061 info_ptr
+= bytes_read
;
9063 case DW_FORM_string
:
9064 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9065 DW_STRING_IS_CANONICAL (attr
) = 0;
9066 info_ptr
+= bytes_read
;
9069 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9071 DW_STRING_IS_CANONICAL (attr
) = 0;
9072 info_ptr
+= bytes_read
;
9074 case DW_FORM_exprloc
:
9076 blk
= dwarf_alloc_block (cu
);
9077 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9078 info_ptr
+= bytes_read
;
9079 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9080 info_ptr
+= blk
->size
;
9081 DW_BLOCK (attr
) = blk
;
9083 case DW_FORM_block1
:
9084 blk
= dwarf_alloc_block (cu
);
9085 blk
->size
= read_1_byte (abfd
, info_ptr
);
9087 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9088 info_ptr
+= blk
->size
;
9089 DW_BLOCK (attr
) = blk
;
9092 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9096 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9099 case DW_FORM_flag_present
:
9100 DW_UNSND (attr
) = 1;
9103 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9104 info_ptr
+= bytes_read
;
9107 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9108 info_ptr
+= bytes_read
;
9111 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9115 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9119 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9123 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9127 /* Convert the signature to something we can record in DW_UNSND
9129 NOTE: This is NULL if the type wasn't found. */
9130 DW_SIGNATURED_TYPE (attr
) =
9131 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9134 case DW_FORM_ref_udata
:
9135 DW_ADDR (attr
) = (cu
->header
.offset
9136 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9137 info_ptr
+= bytes_read
;
9139 case DW_FORM_indirect
:
9140 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9141 info_ptr
+= bytes_read
;
9142 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9145 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9146 dwarf_form_name (form
),
9147 bfd_get_filename (abfd
));
9150 /* We have seen instances where the compiler tried to emit a byte
9151 size attribute of -1 which ended up being encoded as an unsigned
9152 0xffffffff. Although 0xffffffff is technically a valid size value,
9153 an object of this size seems pretty unlikely so we can relatively
9154 safely treat these cases as if the size attribute was invalid and
9155 treat them as zero by default. */
9156 if (attr
->name
== DW_AT_byte_size
9157 && form
== DW_FORM_data4
9158 && DW_UNSND (attr
) >= 0xffffffff)
9161 (&symfile_complaints
,
9162 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9163 hex_string (DW_UNSND (attr
)));
9164 DW_UNSND (attr
) = 0;
9170 /* Read an attribute described by an abbreviated attribute. */
9173 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9174 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9176 attr
->name
= abbrev
->name
;
9177 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9180 /* read dwarf information from a buffer */
9183 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9185 return bfd_get_8 (abfd
, buf
);
9189 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9191 return bfd_get_signed_8 (abfd
, buf
);
9195 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9197 return bfd_get_16 (abfd
, buf
);
9201 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9203 return bfd_get_signed_16 (abfd
, buf
);
9207 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9209 return bfd_get_32 (abfd
, buf
);
9213 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9215 return bfd_get_signed_32 (abfd
, buf
);
9219 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9221 return bfd_get_64 (abfd
, buf
);
9225 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9226 unsigned int *bytes_read
)
9228 struct comp_unit_head
*cu_header
= &cu
->header
;
9229 CORE_ADDR retval
= 0;
9231 if (cu_header
->signed_addr_p
)
9233 switch (cu_header
->addr_size
)
9236 retval
= bfd_get_signed_16 (abfd
, buf
);
9239 retval
= bfd_get_signed_32 (abfd
, buf
);
9242 retval
= bfd_get_signed_64 (abfd
, buf
);
9245 internal_error (__FILE__
, __LINE__
,
9246 _("read_address: bad switch, signed [in module %s]"),
9247 bfd_get_filename (abfd
));
9252 switch (cu_header
->addr_size
)
9255 retval
= bfd_get_16 (abfd
, buf
);
9258 retval
= bfd_get_32 (abfd
, buf
);
9261 retval
= bfd_get_64 (abfd
, buf
);
9264 internal_error (__FILE__
, __LINE__
,
9265 _("read_address: bad switch, unsigned [in module %s]"),
9266 bfd_get_filename (abfd
));
9270 *bytes_read
= cu_header
->addr_size
;
9274 /* Read the initial length from a section. The (draft) DWARF 3
9275 specification allows the initial length to take up either 4 bytes
9276 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9277 bytes describe the length and all offsets will be 8 bytes in length
9280 An older, non-standard 64-bit format is also handled by this
9281 function. The older format in question stores the initial length
9282 as an 8-byte quantity without an escape value. Lengths greater
9283 than 2^32 aren't very common which means that the initial 4 bytes
9284 is almost always zero. Since a length value of zero doesn't make
9285 sense for the 32-bit format, this initial zero can be considered to
9286 be an escape value which indicates the presence of the older 64-bit
9287 format. As written, the code can't detect (old format) lengths
9288 greater than 4GB. If it becomes necessary to handle lengths
9289 somewhat larger than 4GB, we could allow other small values (such
9290 as the non-sensical values of 1, 2, and 3) to also be used as
9291 escape values indicating the presence of the old format.
9293 The value returned via bytes_read should be used to increment the
9294 relevant pointer after calling read_initial_length().
9296 [ Note: read_initial_length() and read_offset() are based on the
9297 document entitled "DWARF Debugging Information Format", revision
9298 3, draft 8, dated November 19, 2001. This document was obtained
9301 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9303 This document is only a draft and is subject to change. (So beware.)
9305 Details regarding the older, non-standard 64-bit format were
9306 determined empirically by examining 64-bit ELF files produced by
9307 the SGI toolchain on an IRIX 6.5 machine.
9309 - Kevin, July 16, 2002
9313 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9315 LONGEST length
= bfd_get_32 (abfd
, buf
);
9317 if (length
== 0xffffffff)
9319 length
= bfd_get_64 (abfd
, buf
+ 4);
9322 else if (length
== 0)
9324 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9325 length
= bfd_get_64 (abfd
, buf
);
9336 /* Cover function for read_initial_length.
9337 Returns the length of the object at BUF, and stores the size of the
9338 initial length in *BYTES_READ and stores the size that offsets will be in
9340 If the initial length size is not equivalent to that specified in
9341 CU_HEADER then issue a complaint.
9342 This is useful when reading non-comp-unit headers. */
9345 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9346 const struct comp_unit_head
*cu_header
,
9347 unsigned int *bytes_read
,
9348 unsigned int *offset_size
)
9350 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9352 gdb_assert (cu_header
->initial_length_size
== 4
9353 || cu_header
->initial_length_size
== 8
9354 || cu_header
->initial_length_size
== 12);
9356 if (cu_header
->initial_length_size
!= *bytes_read
)
9357 complaint (&symfile_complaints
,
9358 _("intermixed 32-bit and 64-bit DWARF sections"));
9360 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9364 /* Read an offset from the data stream. The size of the offset is
9365 given by cu_header->offset_size. */
9368 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9369 unsigned int *bytes_read
)
9371 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9373 *bytes_read
= cu_header
->offset_size
;
9377 /* Read an offset from the data stream. */
9380 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9384 switch (offset_size
)
9387 retval
= bfd_get_32 (abfd
, buf
);
9390 retval
= bfd_get_64 (abfd
, buf
);
9393 internal_error (__FILE__
, __LINE__
,
9394 _("read_offset_1: bad switch [in module %s]"),
9395 bfd_get_filename (abfd
));
9402 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9404 /* If the size of a host char is 8 bits, we can return a pointer
9405 to the buffer, otherwise we have to copy the data to a buffer
9406 allocated on the temporary obstack. */
9407 gdb_assert (HOST_CHAR_BIT
== 8);
9412 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9414 /* If the size of a host char is 8 bits, we can return a pointer
9415 to the string, otherwise we have to copy the string to a buffer
9416 allocated on the temporary obstack. */
9417 gdb_assert (HOST_CHAR_BIT
== 8);
9420 *bytes_read_ptr
= 1;
9423 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9424 return (char *) buf
;
9428 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9429 const struct comp_unit_head
*cu_header
,
9430 unsigned int *bytes_read_ptr
)
9432 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9434 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9435 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9437 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9438 bfd_get_filename (abfd
));
9441 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9443 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9444 bfd_get_filename (abfd
));
9447 gdb_assert (HOST_CHAR_BIT
== 8);
9448 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9450 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9453 static unsigned long
9454 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9456 unsigned long result
;
9457 unsigned int num_read
;
9467 byte
= bfd_get_8 (abfd
, buf
);
9470 result
|= ((unsigned long)(byte
& 127) << shift
);
9471 if ((byte
& 128) == 0)
9477 *bytes_read_ptr
= num_read
;
9482 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9485 int i
, shift
, num_read
;
9494 byte
= bfd_get_8 (abfd
, buf
);
9497 result
|= ((long)(byte
& 127) << shift
);
9499 if ((byte
& 128) == 0)
9504 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9505 result
|= -(((long)1) << shift
);
9506 *bytes_read_ptr
= num_read
;
9510 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9513 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9519 byte
= bfd_get_8 (abfd
, buf
);
9521 if ((byte
& 128) == 0)
9527 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9534 cu
->language
= language_c
;
9536 case DW_LANG_C_plus_plus
:
9537 cu
->language
= language_cplus
;
9540 cu
->language
= language_d
;
9542 case DW_LANG_Fortran77
:
9543 case DW_LANG_Fortran90
:
9544 case DW_LANG_Fortran95
:
9545 cu
->language
= language_fortran
;
9547 case DW_LANG_Mips_Assembler
:
9548 cu
->language
= language_asm
;
9551 cu
->language
= language_java
;
9555 cu
->language
= language_ada
;
9557 case DW_LANG_Modula2
:
9558 cu
->language
= language_m2
;
9560 case DW_LANG_Pascal83
:
9561 cu
->language
= language_pascal
;
9564 cu
->language
= language_objc
;
9566 case DW_LANG_Cobol74
:
9567 case DW_LANG_Cobol85
:
9569 cu
->language
= language_minimal
;
9572 cu
->language_defn
= language_def (cu
->language
);
9575 /* Return the named attribute or NULL if not there. */
9577 static struct attribute
*
9578 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9581 struct attribute
*spec
= NULL
;
9583 for (i
= 0; i
< die
->num_attrs
; ++i
)
9585 if (die
->attrs
[i
].name
== name
)
9586 return &die
->attrs
[i
];
9587 if (die
->attrs
[i
].name
== DW_AT_specification
9588 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9589 spec
= &die
->attrs
[i
];
9594 die
= follow_die_ref (die
, spec
, &cu
);
9595 return dwarf2_attr (die
, name
, cu
);
9601 /* Return the named attribute or NULL if not there,
9602 but do not follow DW_AT_specification, etc.
9603 This is for use in contexts where we're reading .debug_types dies.
9604 Following DW_AT_specification, DW_AT_abstract_origin will take us
9605 back up the chain, and we want to go down. */
9607 static struct attribute
*
9608 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9609 struct dwarf2_cu
*cu
)
9613 for (i
= 0; i
< die
->num_attrs
; ++i
)
9614 if (die
->attrs
[i
].name
== name
)
9615 return &die
->attrs
[i
];
9620 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9621 and holds a non-zero value. This function should only be used for
9622 DW_FORM_flag or DW_FORM_flag_present attributes. */
9625 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9627 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9629 return (attr
&& DW_UNSND (attr
));
9633 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9635 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9636 which value is non-zero. However, we have to be careful with
9637 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9638 (via dwarf2_flag_true_p) follows this attribute. So we may
9639 end up accidently finding a declaration attribute that belongs
9640 to a different DIE referenced by the specification attribute,
9641 even though the given DIE does not have a declaration attribute. */
9642 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9643 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9646 /* Return the die giving the specification for DIE, if there is
9647 one. *SPEC_CU is the CU containing DIE on input, and the CU
9648 containing the return value on output. If there is no
9649 specification, but there is an abstract origin, that is
9652 static struct die_info
*
9653 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9655 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9658 if (spec_attr
== NULL
)
9659 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9661 if (spec_attr
== NULL
)
9664 return follow_die_ref (die
, spec_attr
, spec_cu
);
9667 /* Free the line_header structure *LH, and any arrays and strings it
9670 free_line_header (struct line_header
*lh
)
9672 if (lh
->standard_opcode_lengths
)
9673 xfree (lh
->standard_opcode_lengths
);
9675 /* Remember that all the lh->file_names[i].name pointers are
9676 pointers into debug_line_buffer, and don't need to be freed. */
9678 xfree (lh
->file_names
);
9680 /* Similarly for the include directory names. */
9681 if (lh
->include_dirs
)
9682 xfree (lh
->include_dirs
);
9688 /* Add an entry to LH's include directory table. */
9690 add_include_dir (struct line_header
*lh
, char *include_dir
)
9692 /* Grow the array if necessary. */
9693 if (lh
->include_dirs_size
== 0)
9695 lh
->include_dirs_size
= 1; /* for testing */
9696 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9697 * sizeof (*lh
->include_dirs
));
9699 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9701 lh
->include_dirs_size
*= 2;
9702 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9703 (lh
->include_dirs_size
9704 * sizeof (*lh
->include_dirs
)));
9707 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9711 /* Add an entry to LH's file name table. */
9713 add_file_name (struct line_header
*lh
,
9715 unsigned int dir_index
,
9716 unsigned int mod_time
,
9717 unsigned int length
)
9719 struct file_entry
*fe
;
9721 /* Grow the array if necessary. */
9722 if (lh
->file_names_size
== 0)
9724 lh
->file_names_size
= 1; /* for testing */
9725 lh
->file_names
= xmalloc (lh
->file_names_size
9726 * sizeof (*lh
->file_names
));
9728 else if (lh
->num_file_names
>= lh
->file_names_size
)
9730 lh
->file_names_size
*= 2;
9731 lh
->file_names
= xrealloc (lh
->file_names
,
9732 (lh
->file_names_size
9733 * sizeof (*lh
->file_names
)));
9736 fe
= &lh
->file_names
[lh
->num_file_names
++];
9738 fe
->dir_index
= dir_index
;
9739 fe
->mod_time
= mod_time
;
9740 fe
->length
= length
;
9746 /* Read the statement program header starting at OFFSET in
9747 .debug_line, according to the endianness of ABFD. Return a pointer
9748 to a struct line_header, allocated using xmalloc.
9750 NOTE: the strings in the include directory and file name tables of
9751 the returned object point into debug_line_buffer, and must not be
9753 static struct line_header
*
9754 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9755 struct dwarf2_cu
*cu
)
9757 struct cleanup
*back_to
;
9758 struct line_header
*lh
;
9760 unsigned int bytes_read
, offset_size
;
9762 char *cur_dir
, *cur_file
;
9764 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9765 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9767 complaint (&symfile_complaints
, _("missing .debug_line section"));
9771 /* Make sure that at least there's room for the total_length field.
9772 That could be 12 bytes long, but we're just going to fudge that. */
9773 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9775 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9779 lh
= xmalloc (sizeof (*lh
));
9780 memset (lh
, 0, sizeof (*lh
));
9781 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9784 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9786 /* Read in the header. */
9788 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9789 &bytes_read
, &offset_size
);
9790 line_ptr
+= bytes_read
;
9791 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9792 + dwarf2_per_objfile
->line
.size
))
9794 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9797 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9798 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9800 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9801 line_ptr
+= offset_size
;
9802 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9804 if (lh
->version
>= 4)
9806 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9810 lh
->maximum_ops_per_instruction
= 1;
9812 if (lh
->maximum_ops_per_instruction
== 0)
9814 lh
->maximum_ops_per_instruction
= 1;
9815 complaint (&symfile_complaints
,
9816 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9819 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9821 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9823 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9825 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9827 lh
->standard_opcode_lengths
9828 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9830 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9831 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9833 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9837 /* Read directory table. */
9838 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9840 line_ptr
+= bytes_read
;
9841 add_include_dir (lh
, cur_dir
);
9843 line_ptr
+= bytes_read
;
9845 /* Read file name table. */
9846 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9848 unsigned int dir_index
, mod_time
, length
;
9850 line_ptr
+= bytes_read
;
9851 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9852 line_ptr
+= bytes_read
;
9853 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9854 line_ptr
+= bytes_read
;
9855 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9856 line_ptr
+= bytes_read
;
9858 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9860 line_ptr
+= bytes_read
;
9861 lh
->statement_program_start
= line_ptr
;
9863 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9864 + dwarf2_per_objfile
->line
.size
))
9865 complaint (&symfile_complaints
,
9866 _("line number info header doesn't fit in `.debug_line' section"));
9868 discard_cleanups (back_to
);
9872 /* This function exists to work around a bug in certain compilers
9873 (particularly GCC 2.95), in which the first line number marker of a
9874 function does not show up until after the prologue, right before
9875 the second line number marker. This function shifts ADDRESS down
9876 to the beginning of the function if necessary, and is called on
9877 addresses passed to record_line. */
9880 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
9882 struct function_range
*fn
;
9884 /* Find the function_range containing address. */
9889 cu
->cached_fn
= cu
->first_fn
;
9893 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9899 while (fn
&& fn
!= cu
->cached_fn
)
9900 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9910 if (address
!= fn
->lowpc
)
9911 complaint (&symfile_complaints
,
9912 _("misplaced first line number at 0x%lx for '%s'"),
9913 (unsigned long) address
, fn
->name
);
9918 /* Subroutine of dwarf_decode_lines to simplify it.
9919 Return the file name of the psymtab for included file FILE_INDEX
9920 in line header LH of PST.
9921 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9922 If space for the result is malloc'd, it will be freed by a cleanup.
9923 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9926 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
9927 const struct partial_symtab
*pst
,
9928 const char *comp_dir
)
9930 const struct file_entry fe
= lh
->file_names
[file_index
];
9931 char *include_name
= fe
.name
;
9932 char *include_name_to_compare
= include_name
;
9933 char *dir_name
= NULL
;
9938 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
9940 if (!IS_ABSOLUTE_PATH (include_name
)
9941 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
9943 /* Avoid creating a duplicate psymtab for PST.
9944 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9945 Before we do the comparison, however, we need to account
9946 for DIR_NAME and COMP_DIR.
9947 First prepend dir_name (if non-NULL). If we still don't
9948 have an absolute path prepend comp_dir (if non-NULL).
9949 However, the directory we record in the include-file's
9950 psymtab does not contain COMP_DIR (to match the
9951 corresponding symtab(s)).
9956 bash$ gcc -g ./hello.c
9957 include_name = "hello.c"
9959 DW_AT_comp_dir = comp_dir = "/tmp"
9960 DW_AT_name = "./hello.c" */
9962 if (dir_name
!= NULL
)
9964 include_name
= concat (dir_name
, SLASH_STRING
,
9965 include_name
, (char *)NULL
);
9966 include_name_to_compare
= include_name
;
9967 make_cleanup (xfree
, include_name
);
9969 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
9971 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
9972 include_name
, (char *)NULL
);
9976 pst_filename
= pst
->filename
;
9977 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
9979 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
9980 pst_filename
, (char *)NULL
);
9983 file_is_pst
= strcmp (include_name_to_compare
, pst_filename
) == 0;
9985 if (include_name_to_compare
!= include_name
)
9986 xfree (include_name_to_compare
);
9987 if (pst_filename
!= pst
->filename
)
9988 xfree (pst_filename
);
9992 return include_name
;
9995 /* Decode the Line Number Program (LNP) for the given line_header
9996 structure and CU. The actual information extracted and the type
9997 of structures created from the LNP depends on the value of PST.
9999 1. If PST is NULL, then this procedure uses the data from the program
10000 to create all necessary symbol tables, and their linetables.
10002 2. If PST is not NULL, this procedure reads the program to determine
10003 the list of files included by the unit represented by PST, and
10004 builds all the associated partial symbol tables.
10006 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10007 It is used for relative paths in the line table.
10008 NOTE: When processing partial symtabs (pst != NULL),
10009 comp_dir == pst->dirname.
10011 NOTE: It is important that psymtabs have the same file name (via strcmp)
10012 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10013 symtab we don't use it in the name of the psymtabs we create.
10014 E.g. expand_line_sal requires this when finding psymtabs to expand.
10015 A good testcase for this is mb-inline.exp. */
10018 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
10019 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10021 gdb_byte
*line_ptr
, *extended_end
;
10022 gdb_byte
*line_end
;
10023 unsigned int bytes_read
, extended_len
;
10024 unsigned char op_code
, extended_op
, adj_opcode
;
10025 CORE_ADDR baseaddr
;
10026 struct objfile
*objfile
= cu
->objfile
;
10027 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10028 const int decode_for_pst_p
= (pst
!= NULL
);
10029 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10031 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10033 line_ptr
= lh
->statement_program_start
;
10034 line_end
= lh
->statement_program_end
;
10036 /* Read the statement sequences until there's nothing left. */
10037 while (line_ptr
< line_end
)
10039 /* state machine registers */
10040 CORE_ADDR address
= 0;
10041 unsigned int file
= 1;
10042 unsigned int line
= 1;
10043 unsigned int column
= 0;
10044 int is_stmt
= lh
->default_is_stmt
;
10045 int basic_block
= 0;
10046 int end_sequence
= 0;
10048 unsigned char op_index
= 0;
10050 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10052 /* Start a subfile for the current file of the state machine. */
10053 /* lh->include_dirs and lh->file_names are 0-based, but the
10054 directory and file name numbers in the statement program
10056 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10060 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10062 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10065 /* Decode the table. */
10066 while (!end_sequence
)
10068 op_code
= read_1_byte (abfd
, line_ptr
);
10070 if (line_ptr
> line_end
)
10072 dwarf2_debug_line_missing_end_sequence_complaint ();
10076 if (op_code
>= lh
->opcode_base
)
10078 /* Special operand. */
10079 adj_opcode
= op_code
- lh
->opcode_base
;
10080 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10081 / lh
->maximum_ops_per_instruction
)
10082 * lh
->minimum_instruction_length
);
10083 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10084 % lh
->maximum_ops_per_instruction
);
10085 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10086 if (lh
->num_file_names
< file
|| file
== 0)
10087 dwarf2_debug_line_missing_file_complaint ();
10088 /* For now we ignore lines not starting on an
10089 instruction boundary. */
10090 else if (op_index
== 0)
10092 lh
->file_names
[file
- 1].included_p
= 1;
10093 if (!decode_for_pst_p
&& is_stmt
)
10095 if (last_subfile
!= current_subfile
)
10097 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10099 record_line (last_subfile
, 0, addr
);
10100 last_subfile
= current_subfile
;
10102 /* Append row to matrix using current values. */
10103 addr
= check_cu_functions (address
, cu
);
10104 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10105 record_line (current_subfile
, line
, addr
);
10110 else switch (op_code
)
10112 case DW_LNS_extended_op
:
10113 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10114 line_ptr
+= bytes_read
;
10115 extended_end
= line_ptr
+ extended_len
;
10116 extended_op
= read_1_byte (abfd
, line_ptr
);
10118 switch (extended_op
)
10120 case DW_LNE_end_sequence
:
10123 case DW_LNE_set_address
:
10124 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10126 line_ptr
+= bytes_read
;
10127 address
+= baseaddr
;
10129 case DW_LNE_define_file
:
10132 unsigned int dir_index
, mod_time
, length
;
10134 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10135 line_ptr
+= bytes_read
;
10137 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10138 line_ptr
+= bytes_read
;
10140 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10141 line_ptr
+= bytes_read
;
10143 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10144 line_ptr
+= bytes_read
;
10145 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10148 case DW_LNE_set_discriminator
:
10149 /* The discriminator is not interesting to the debugger;
10151 line_ptr
= extended_end
;
10154 complaint (&symfile_complaints
,
10155 _("mangled .debug_line section"));
10158 /* Make sure that we parsed the extended op correctly. If e.g.
10159 we expected a different address size than the producer used,
10160 we may have read the wrong number of bytes. */
10161 if (line_ptr
!= extended_end
)
10163 complaint (&symfile_complaints
,
10164 _("mangled .debug_line section"));
10169 if (lh
->num_file_names
< file
|| file
== 0)
10170 dwarf2_debug_line_missing_file_complaint ();
10173 lh
->file_names
[file
- 1].included_p
= 1;
10174 if (!decode_for_pst_p
&& is_stmt
)
10176 if (last_subfile
!= current_subfile
)
10178 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10180 record_line (last_subfile
, 0, addr
);
10181 last_subfile
= current_subfile
;
10183 addr
= check_cu_functions (address
, cu
);
10184 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10185 record_line (current_subfile
, line
, addr
);
10190 case DW_LNS_advance_pc
:
10193 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10195 address
+= (((op_index
+ adjust
)
10196 / lh
->maximum_ops_per_instruction
)
10197 * lh
->minimum_instruction_length
);
10198 op_index
= ((op_index
+ adjust
)
10199 % lh
->maximum_ops_per_instruction
);
10200 line_ptr
+= bytes_read
;
10203 case DW_LNS_advance_line
:
10204 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10205 line_ptr
+= bytes_read
;
10207 case DW_LNS_set_file
:
10209 /* The arrays lh->include_dirs and lh->file_names are
10210 0-based, but the directory and file name numbers in
10211 the statement program are 1-based. */
10212 struct file_entry
*fe
;
10215 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10216 line_ptr
+= bytes_read
;
10217 if (lh
->num_file_names
< file
|| file
== 0)
10218 dwarf2_debug_line_missing_file_complaint ();
10221 fe
= &lh
->file_names
[file
- 1];
10223 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10224 if (!decode_for_pst_p
)
10226 last_subfile
= current_subfile
;
10227 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10232 case DW_LNS_set_column
:
10233 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10234 line_ptr
+= bytes_read
;
10236 case DW_LNS_negate_stmt
:
10237 is_stmt
= (!is_stmt
);
10239 case DW_LNS_set_basic_block
:
10242 /* Add to the address register of the state machine the
10243 address increment value corresponding to special opcode
10244 255. I.e., this value is scaled by the minimum
10245 instruction length since special opcode 255 would have
10246 scaled the the increment. */
10247 case DW_LNS_const_add_pc
:
10249 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10251 address
+= (((op_index
+ adjust
)
10252 / lh
->maximum_ops_per_instruction
)
10253 * lh
->minimum_instruction_length
);
10254 op_index
= ((op_index
+ adjust
)
10255 % lh
->maximum_ops_per_instruction
);
10258 case DW_LNS_fixed_advance_pc
:
10259 address
+= read_2_bytes (abfd
, line_ptr
);
10265 /* Unknown standard opcode, ignore it. */
10268 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10270 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10271 line_ptr
+= bytes_read
;
10276 if (lh
->num_file_names
< file
|| file
== 0)
10277 dwarf2_debug_line_missing_file_complaint ();
10280 lh
->file_names
[file
- 1].included_p
= 1;
10281 if (!decode_for_pst_p
)
10283 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10284 record_line (current_subfile
, 0, addr
);
10289 if (decode_for_pst_p
)
10293 /* Now that we're done scanning the Line Header Program, we can
10294 create the psymtab of each included file. */
10295 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10296 if (lh
->file_names
[file_index
].included_p
== 1)
10298 char *include_name
=
10299 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10300 if (include_name
!= NULL
)
10301 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10306 /* Make sure a symtab is created for every file, even files
10307 which contain only variables (i.e. no code with associated
10311 struct file_entry
*fe
;
10313 for (i
= 0; i
< lh
->num_file_names
; i
++)
10317 fe
= &lh
->file_names
[i
];
10319 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10320 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10322 /* Skip the main file; we don't need it, and it must be
10323 allocated last, so that it will show up before the
10324 non-primary symtabs in the objfile's symtab list. */
10325 if (current_subfile
== first_subfile
)
10328 if (current_subfile
->symtab
== NULL
)
10329 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10331 fe
->symtab
= current_subfile
->symtab
;
10336 /* Start a subfile for DWARF. FILENAME is the name of the file and
10337 DIRNAME the name of the source directory which contains FILENAME
10338 or NULL if not known. COMP_DIR is the compilation directory for the
10339 linetable's compilation unit or NULL if not known.
10340 This routine tries to keep line numbers from identical absolute and
10341 relative file names in a common subfile.
10343 Using the `list' example from the GDB testsuite, which resides in
10344 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10345 of /srcdir/list0.c yields the following debugging information for list0.c:
10347 DW_AT_name: /srcdir/list0.c
10348 DW_AT_comp_dir: /compdir
10349 files.files[0].name: list0.h
10350 files.files[0].dir: /srcdir
10351 files.files[1].name: list0.c
10352 files.files[1].dir: /srcdir
10354 The line number information for list0.c has to end up in a single
10355 subfile, so that `break /srcdir/list0.c:1' works as expected.
10356 start_subfile will ensure that this happens provided that we pass the
10357 concatenation of files.files[1].dir and files.files[1].name as the
10361 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
10365 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10366 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10367 second argument to start_subfile. To be consistent, we do the
10368 same here. In order not to lose the line information directory,
10369 we concatenate it to the filename when it makes sense.
10370 Note that the Dwarf3 standard says (speaking of filenames in line
10371 information): ``The directory index is ignored for file names
10372 that represent full path names''. Thus ignoring dirname in the
10373 `else' branch below isn't an issue. */
10375 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10376 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10378 fullname
= filename
;
10380 start_subfile (fullname
, comp_dir
);
10382 if (fullname
!= filename
)
10387 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10388 struct dwarf2_cu
*cu
)
10390 struct objfile
*objfile
= cu
->objfile
;
10391 struct comp_unit_head
*cu_header
= &cu
->header
;
10393 /* NOTE drow/2003-01-30: There used to be a comment and some special
10394 code here to turn a symbol with DW_AT_external and a
10395 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10396 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10397 with some versions of binutils) where shared libraries could have
10398 relocations against symbols in their debug information - the
10399 minimal symbol would have the right address, but the debug info
10400 would not. It's no longer necessary, because we will explicitly
10401 apply relocations when we read in the debug information now. */
10403 /* A DW_AT_location attribute with no contents indicates that a
10404 variable has been optimized away. */
10405 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10407 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10411 /* Handle one degenerate form of location expression specially, to
10412 preserve GDB's previous behavior when section offsets are
10413 specified. If this is just a DW_OP_addr then mark this symbol
10416 if (attr_form_is_block (attr
)
10417 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10418 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10420 unsigned int dummy
;
10422 SYMBOL_VALUE_ADDRESS (sym
) =
10423 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10424 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10425 fixup_symbol_section (sym
, objfile
);
10426 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10427 SYMBOL_SECTION (sym
));
10431 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10432 expression evaluator, and use LOC_COMPUTED only when necessary
10433 (i.e. when the value of a register or memory location is
10434 referenced, or a thread-local block, etc.). Then again, it might
10435 not be worthwhile. I'm assuming that it isn't unless performance
10436 or memory numbers show me otherwise. */
10438 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10439 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10442 /* Given a pointer to a DWARF information entry, figure out if we need
10443 to make a symbol table entry for it, and if so, create a new entry
10444 and return a pointer to it.
10445 If TYPE is NULL, determine symbol type from the die, otherwise
10446 used the passed type.
10447 If SPACE is not NULL, use it to hold the new symbol. If it is
10448 NULL, allocate a new symbol on the objfile's obstack. */
10450 static struct symbol
*
10451 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10452 struct symbol
*space
)
10454 struct objfile
*objfile
= cu
->objfile
;
10455 struct symbol
*sym
= NULL
;
10457 struct attribute
*attr
= NULL
;
10458 struct attribute
*attr2
= NULL
;
10459 CORE_ADDR baseaddr
;
10460 struct pending
**list_to_add
= NULL
;
10462 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10464 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10466 name
= dwarf2_name (die
, cu
);
10469 const char *linkagename
;
10470 int suppress_add
= 0;
10475 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10476 OBJSTAT (objfile
, n_syms
++);
10478 /* Cache this symbol's name and the name's demangled form (if any). */
10479 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10480 linkagename
= dwarf2_physname (name
, die
, cu
);
10481 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10483 /* Fortran does not have mangling standard and the mangling does differ
10484 between gfortran, iFort etc. */
10485 if (cu
->language
== language_fortran
10486 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10487 symbol_set_demangled_name (&(sym
->ginfo
),
10488 (char *) dwarf2_full_name (name
, die
, cu
),
10491 /* Default assumptions.
10492 Use the passed type or decode it from the die. */
10493 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10494 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10496 SYMBOL_TYPE (sym
) = type
;
10498 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10499 attr
= dwarf2_attr (die
,
10500 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10504 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10507 attr
= dwarf2_attr (die
,
10508 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10512 int file_index
= DW_UNSND (attr
);
10514 if (cu
->line_header
== NULL
10515 || file_index
> cu
->line_header
->num_file_names
)
10516 complaint (&symfile_complaints
,
10517 _("file index out of range"));
10518 else if (file_index
> 0)
10520 struct file_entry
*fe
;
10522 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10523 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10530 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10533 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10535 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10536 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10537 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10538 add_symbol_to_list (sym
, cu
->list_in_scope
);
10540 case DW_TAG_subprogram
:
10541 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10543 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10544 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10545 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10546 || cu
->language
== language_ada
)
10548 /* Subprograms marked external are stored as a global symbol.
10549 Ada subprograms, whether marked external or not, are always
10550 stored as a global symbol, because we want to be able to
10551 access them globally. For instance, we want to be able
10552 to break on a nested subprogram without having to
10553 specify the context. */
10554 list_to_add
= &global_symbols
;
10558 list_to_add
= cu
->list_in_scope
;
10561 case DW_TAG_inlined_subroutine
:
10562 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10564 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10565 SYMBOL_INLINED (sym
) = 1;
10566 /* Do not add the symbol to any lists. It will be found via
10567 BLOCK_FUNCTION from the blockvector. */
10569 case DW_TAG_template_value_param
:
10571 /* Fall through. */
10572 case DW_TAG_variable
:
10573 case DW_TAG_member
:
10574 /* Compilation with minimal debug info may result in variables
10575 with missing type entries. Change the misleading `void' type
10576 to something sensible. */
10577 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10579 = objfile_type (objfile
)->nodebug_data_symbol
;
10581 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10582 /* In the case of DW_TAG_member, we should only be called for
10583 static const members. */
10584 if (die
->tag
== DW_TAG_member
)
10586 /* dwarf2_add_field uses die_is_declaration,
10587 so we do the same. */
10588 gdb_assert (die_is_declaration (die
, cu
));
10593 dwarf2_const_value (attr
, sym
, cu
);
10594 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10597 if (attr2
&& (DW_UNSND (attr2
) != 0))
10598 list_to_add
= &global_symbols
;
10600 list_to_add
= cu
->list_in_scope
;
10604 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10607 var_decode_location (attr
, sym
, cu
);
10608 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10609 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10610 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10611 && !dwarf2_per_objfile
->has_section_at_zero
)
10613 /* When a static variable is eliminated by the linker,
10614 the corresponding debug information is not stripped
10615 out, but the variable address is set to null;
10616 do not add such variables into symbol table. */
10618 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10620 /* Workaround gfortran PR debug/40040 - it uses
10621 DW_AT_location for variables in -fPIC libraries which may
10622 get overriden by other libraries/executable and get
10623 a different address. Resolve it by the minimal symbol
10624 which may come from inferior's executable using copy
10625 relocation. Make this workaround only for gfortran as for
10626 other compilers GDB cannot guess the minimal symbol
10627 Fortran mangling kind. */
10628 if (cu
->language
== language_fortran
&& die
->parent
10629 && die
->parent
->tag
== DW_TAG_module
10631 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10632 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10634 /* A variable with DW_AT_external is never static,
10635 but it may be block-scoped. */
10636 list_to_add
= (cu
->list_in_scope
== &file_symbols
10637 ? &global_symbols
: cu
->list_in_scope
);
10640 list_to_add
= cu
->list_in_scope
;
10644 /* We do not know the address of this symbol.
10645 If it is an external symbol and we have type information
10646 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10647 The address of the variable will then be determined from
10648 the minimal symbol table whenever the variable is
10650 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10651 if (attr2
&& (DW_UNSND (attr2
) != 0)
10652 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10654 /* A variable with DW_AT_external is never static, but it
10655 may be block-scoped. */
10656 list_to_add
= (cu
->list_in_scope
== &file_symbols
10657 ? &global_symbols
: cu
->list_in_scope
);
10659 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10661 else if (!die_is_declaration (die
, cu
))
10663 /* Use the default LOC_OPTIMIZED_OUT class. */
10664 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10666 list_to_add
= cu
->list_in_scope
;
10670 case DW_TAG_formal_parameter
:
10671 /* If we are inside a function, mark this as an argument. If
10672 not, we might be looking at an argument to an inlined function
10673 when we do not have enough information to show inlined frames;
10674 pretend it's a local variable in that case so that the user can
10676 if (context_stack_depth
> 0
10677 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10678 SYMBOL_IS_ARGUMENT (sym
) = 1;
10679 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10682 var_decode_location (attr
, sym
, cu
);
10684 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10687 dwarf2_const_value (attr
, sym
, cu
);
10689 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10690 if (attr
&& DW_UNSND (attr
))
10692 struct type
*ref_type
;
10694 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10695 SYMBOL_TYPE (sym
) = ref_type
;
10698 list_to_add
= cu
->list_in_scope
;
10700 case DW_TAG_unspecified_parameters
:
10701 /* From varargs functions; gdb doesn't seem to have any
10702 interest in this information, so just ignore it for now.
10705 case DW_TAG_template_type_param
:
10707 /* Fall through. */
10708 case DW_TAG_class_type
:
10709 case DW_TAG_interface_type
:
10710 case DW_TAG_structure_type
:
10711 case DW_TAG_union_type
:
10712 case DW_TAG_set_type
:
10713 case DW_TAG_enumeration_type
:
10714 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10715 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10718 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10719 really ever be static objects: otherwise, if you try
10720 to, say, break of a class's method and you're in a file
10721 which doesn't mention that class, it won't work unless
10722 the check for all static symbols in lookup_symbol_aux
10723 saves you. See the OtherFileClass tests in
10724 gdb.c++/namespace.exp. */
10728 list_to_add
= (cu
->list_in_scope
== &file_symbols
10729 && (cu
->language
== language_cplus
10730 || cu
->language
== language_java
)
10731 ? &global_symbols
: cu
->list_in_scope
);
10733 /* The semantics of C++ state that "struct foo {
10734 ... }" also defines a typedef for "foo". A Java
10735 class declaration also defines a typedef for the
10737 if (cu
->language
== language_cplus
10738 || cu
->language
== language_java
10739 || cu
->language
== language_ada
)
10741 /* The symbol's name is already allocated along
10742 with this objfile, so we don't need to
10743 duplicate it for the type. */
10744 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10745 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10750 case DW_TAG_typedef
:
10751 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10752 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10753 list_to_add
= cu
->list_in_scope
;
10755 case DW_TAG_base_type
:
10756 case DW_TAG_subrange_type
:
10757 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10758 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10759 list_to_add
= cu
->list_in_scope
;
10761 case DW_TAG_enumerator
:
10762 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10765 dwarf2_const_value (attr
, sym
, cu
);
10768 /* NOTE: carlton/2003-11-10: See comment above in the
10769 DW_TAG_class_type, etc. block. */
10771 list_to_add
= (cu
->list_in_scope
== &file_symbols
10772 && (cu
->language
== language_cplus
10773 || cu
->language
== language_java
)
10774 ? &global_symbols
: cu
->list_in_scope
);
10777 case DW_TAG_namespace
:
10778 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10779 list_to_add
= &global_symbols
;
10782 /* Not a tag we recognize. Hopefully we aren't processing
10783 trash data, but since we must specifically ignore things
10784 we don't recognize, there is nothing else we should do at
10786 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10787 dwarf_tag_name (die
->tag
));
10793 sym
->hash_next
= objfile
->template_symbols
;
10794 objfile
->template_symbols
= sym
;
10795 list_to_add
= NULL
;
10798 if (list_to_add
!= NULL
)
10799 add_symbol_to_list (sym
, list_to_add
);
10801 /* For the benefit of old versions of GCC, check for anonymous
10802 namespaces based on the demangled name. */
10803 if (!processing_has_namespace_info
10804 && cu
->language
== language_cplus
)
10805 cp_scan_for_anonymous_namespaces (sym
);
10810 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10812 static struct symbol
*
10813 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10815 return new_symbol_full (die
, type
, cu
, NULL
);
10818 /* Given an attr with a DW_FORM_dataN value in host byte order,
10819 zero-extend it as appropriate for the symbol's type. The DWARF
10820 standard (v4) is not entirely clear about the meaning of using
10821 DW_FORM_dataN for a constant with a signed type, where the type is
10822 wider than the data. The conclusion of a discussion on the DWARF
10823 list was that this is unspecified. We choose to always zero-extend
10824 because that is the interpretation long in use by GCC. */
10827 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10828 const char *name
, struct obstack
*obstack
,
10829 struct dwarf2_cu
*cu
, long *value
, int bits
)
10831 struct objfile
*objfile
= cu
->objfile
;
10832 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10833 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10834 LONGEST l
= DW_UNSND (attr
);
10836 if (bits
< sizeof (*value
) * 8)
10838 l
&= ((LONGEST
) 1 << bits
) - 1;
10841 else if (bits
== sizeof (*value
) * 8)
10845 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10846 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10853 /* Read a constant value from an attribute. Either set *VALUE, or if
10854 the value does not fit in *VALUE, set *BYTES - either already
10855 allocated on the objfile obstack, or newly allocated on OBSTACK,
10856 or, set *BATON, if we translated the constant to a location
10860 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10861 const char *name
, struct obstack
*obstack
,
10862 struct dwarf2_cu
*cu
,
10863 long *value
, gdb_byte
**bytes
,
10864 struct dwarf2_locexpr_baton
**baton
)
10866 struct objfile
*objfile
= cu
->objfile
;
10867 struct comp_unit_head
*cu_header
= &cu
->header
;
10868 struct dwarf_block
*blk
;
10869 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10870 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10876 switch (attr
->form
)
10882 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
10883 dwarf2_const_value_length_mismatch_complaint (name
,
10884 cu_header
->addr_size
,
10885 TYPE_LENGTH (type
));
10886 /* Symbols of this form are reasonably rare, so we just
10887 piggyback on the existing location code rather than writing
10888 a new implementation of symbol_computed_ops. */
10889 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
10890 sizeof (struct dwarf2_locexpr_baton
));
10891 (*baton
)->per_cu
= cu
->per_cu
;
10892 gdb_assert ((*baton
)->per_cu
);
10894 (*baton
)->size
= 2 + cu_header
->addr_size
;
10895 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
10896 (*baton
)->data
= data
;
10898 data
[0] = DW_OP_addr
;
10899 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
10900 byte_order
, DW_ADDR (attr
));
10901 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
10904 case DW_FORM_string
:
10906 /* DW_STRING is already allocated on the objfile obstack, point
10908 *bytes
= (gdb_byte
*) DW_STRING (attr
);
10910 case DW_FORM_block1
:
10911 case DW_FORM_block2
:
10912 case DW_FORM_block4
:
10913 case DW_FORM_block
:
10914 case DW_FORM_exprloc
:
10915 blk
= DW_BLOCK (attr
);
10916 if (TYPE_LENGTH (type
) != blk
->size
)
10917 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
10918 TYPE_LENGTH (type
));
10919 *bytes
= blk
->data
;
10922 /* The DW_AT_const_value attributes are supposed to carry the
10923 symbol's value "represented as it would be on the target
10924 architecture." By the time we get here, it's already been
10925 converted to host endianness, so we just need to sign- or
10926 zero-extend it as appropriate. */
10927 case DW_FORM_data1
:
10928 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
10930 case DW_FORM_data2
:
10931 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
10933 case DW_FORM_data4
:
10934 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
10936 case DW_FORM_data8
:
10937 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
10940 case DW_FORM_sdata
:
10941 *value
= DW_SND (attr
);
10944 case DW_FORM_udata
:
10945 *value
= DW_UNSND (attr
);
10949 complaint (&symfile_complaints
,
10950 _("unsupported const value attribute form: '%s'"),
10951 dwarf_form_name (attr
->form
));
10958 /* Copy constant value from an attribute to a symbol. */
10961 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
10962 struct dwarf2_cu
*cu
)
10964 struct objfile
*objfile
= cu
->objfile
;
10965 struct comp_unit_head
*cu_header
= &cu
->header
;
10968 struct dwarf2_locexpr_baton
*baton
;
10970 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
10971 SYMBOL_PRINT_NAME (sym
),
10972 &objfile
->objfile_obstack
, cu
,
10973 &value
, &bytes
, &baton
);
10977 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
10978 SYMBOL_LOCATION_BATON (sym
) = baton
;
10979 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10981 else if (bytes
!= NULL
)
10983 SYMBOL_VALUE_BYTES (sym
) = bytes
;
10984 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
10988 SYMBOL_VALUE (sym
) = value
;
10989 SYMBOL_CLASS (sym
) = LOC_CONST
;
10993 /* Return the type of the die in question using its DW_AT_type attribute. */
10995 static struct type
*
10996 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10998 struct attribute
*type_attr
;
11000 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11003 /* A missing DW_AT_type represents a void type. */
11004 return objfile_type (cu
->objfile
)->builtin_void
;
11007 return lookup_die_type (die
, type_attr
, cu
);
11010 /* True iff CU's producer generates GNAT Ada auxiliary information
11011 that allows to find parallel types through that information instead
11012 of having to do expensive parallel lookups by type name. */
11015 need_gnat_info (struct dwarf2_cu
*cu
)
11017 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11018 of GNAT produces this auxiliary information, without any indication
11019 that it is produced. Part of enhancing the FSF version of GNAT
11020 to produce that information will be to put in place an indicator
11021 that we can use in order to determine whether the descriptive type
11022 info is available or not. One suggestion that has been made is
11023 to use a new attribute, attached to the CU die. For now, assume
11024 that the descriptive type info is not available. */
11028 /* Return the auxiliary type of the die in question using its
11029 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11030 attribute is not present. */
11032 static struct type
*
11033 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11035 struct attribute
*type_attr
;
11037 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11041 return lookup_die_type (die
, type_attr
, cu
);
11044 /* If DIE has a descriptive_type attribute, then set the TYPE's
11045 descriptive type accordingly. */
11048 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11049 struct dwarf2_cu
*cu
)
11051 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11053 if (descriptive_type
)
11055 ALLOCATE_GNAT_AUX_TYPE (type
);
11056 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11060 /* Return the containing type of the die in question using its
11061 DW_AT_containing_type attribute. */
11063 static struct type
*
11064 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11066 struct attribute
*type_attr
;
11068 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11070 error (_("Dwarf Error: Problem turning containing type into gdb type "
11071 "[in module %s]"), cu
->objfile
->name
);
11073 return lookup_die_type (die
, type_attr
, cu
);
11076 /* Look up the type of DIE in CU using its type attribute ATTR.
11077 If there is no type substitute an error marker. */
11079 static struct type
*
11080 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11081 struct dwarf2_cu
*cu
)
11083 struct type
*this_type
;
11085 /* First see if we have it cached. */
11087 if (is_ref_attr (attr
))
11089 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11091 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11093 else if (attr
->form
== DW_FORM_sig8
)
11095 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11096 struct dwarf2_cu
*sig_cu
;
11097 unsigned int offset
;
11099 /* sig_type will be NULL if the signatured type is missing from
11101 if (sig_type
== NULL
)
11102 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11103 "at 0x%x [in module %s]"),
11104 die
->offset
, cu
->objfile
->name
);
11106 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11107 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11108 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11112 dump_die_for_error (die
);
11113 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11114 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11117 /* If not cached we need to read it in. */
11119 if (this_type
== NULL
)
11121 struct die_info
*type_die
;
11122 struct dwarf2_cu
*type_cu
= cu
;
11124 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11125 /* If the type is cached, we should have found it above. */
11126 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11127 this_type
= read_type_die_1 (type_die
, type_cu
);
11130 /* If we still don't have a type use an error marker. */
11132 if (this_type
== NULL
)
11134 char *message
, *saved
;
11136 /* read_type_die already issued a complaint. */
11137 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11141 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11142 message
, strlen (message
));
11145 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11151 /* Return the type in DIE, CU.
11152 Returns NULL for invalid types.
11154 This first does a lookup in the appropriate type_hash table,
11155 and only reads the die in if necessary.
11157 NOTE: This can be called when reading in partial or full symbols. */
11159 static struct type
*
11160 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11162 struct type
*this_type
;
11164 this_type
= get_die_type (die
, cu
);
11168 return read_type_die_1 (die
, cu
);
11171 /* Read the type in DIE, CU.
11172 Returns NULL for invalid types. */
11174 static struct type
*
11175 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11177 struct type
*this_type
= NULL
;
11181 case DW_TAG_class_type
:
11182 case DW_TAG_interface_type
:
11183 case DW_TAG_structure_type
:
11184 case DW_TAG_union_type
:
11185 this_type
= read_structure_type (die
, cu
);
11187 case DW_TAG_enumeration_type
:
11188 this_type
= read_enumeration_type (die
, cu
);
11190 case DW_TAG_subprogram
:
11191 case DW_TAG_subroutine_type
:
11192 case DW_TAG_inlined_subroutine
:
11193 this_type
= read_subroutine_type (die
, cu
);
11195 case DW_TAG_array_type
:
11196 this_type
= read_array_type (die
, cu
);
11198 case DW_TAG_set_type
:
11199 this_type
= read_set_type (die
, cu
);
11201 case DW_TAG_pointer_type
:
11202 this_type
= read_tag_pointer_type (die
, cu
);
11204 case DW_TAG_ptr_to_member_type
:
11205 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11207 case DW_TAG_reference_type
:
11208 this_type
= read_tag_reference_type (die
, cu
);
11210 case DW_TAG_const_type
:
11211 this_type
= read_tag_const_type (die
, cu
);
11213 case DW_TAG_volatile_type
:
11214 this_type
= read_tag_volatile_type (die
, cu
);
11216 case DW_TAG_string_type
:
11217 this_type
= read_tag_string_type (die
, cu
);
11219 case DW_TAG_typedef
:
11220 this_type
= read_typedef (die
, cu
);
11222 case DW_TAG_subrange_type
:
11223 this_type
= read_subrange_type (die
, cu
);
11225 case DW_TAG_base_type
:
11226 this_type
= read_base_type (die
, cu
);
11228 case DW_TAG_unspecified_type
:
11229 this_type
= read_unspecified_type (die
, cu
);
11231 case DW_TAG_namespace
:
11232 this_type
= read_namespace_type (die
, cu
);
11234 case DW_TAG_module
:
11235 this_type
= read_module_type (die
, cu
);
11238 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11239 dwarf_tag_name (die
->tag
));
11246 /* Return the name of the namespace/class that DIE is defined within,
11247 or "" if we can't tell. The caller should not xfree the result.
11249 For example, if we're within the method foo() in the following
11259 then determine_prefix on foo's die will return "N::C". */
11262 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11264 struct die_info
*parent
, *spec_die
;
11265 struct dwarf2_cu
*spec_cu
;
11266 struct type
*parent_type
;
11268 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11269 && cu
->language
!= language_fortran
)
11272 /* We have to be careful in the presence of DW_AT_specification.
11273 For example, with GCC 3.4, given the code
11277 // Definition of N::foo.
11281 then we'll have a tree of DIEs like this:
11283 1: DW_TAG_compile_unit
11284 2: DW_TAG_namespace // N
11285 3: DW_TAG_subprogram // declaration of N::foo
11286 4: DW_TAG_subprogram // definition of N::foo
11287 DW_AT_specification // refers to die #3
11289 Thus, when processing die #4, we have to pretend that we're in
11290 the context of its DW_AT_specification, namely the contex of die
11293 spec_die
= die_specification (die
, &spec_cu
);
11294 if (spec_die
== NULL
)
11295 parent
= die
->parent
;
11298 parent
= spec_die
->parent
;
11302 if (parent
== NULL
)
11304 else if (parent
->building_fullname
)
11307 const char *parent_name
;
11309 /* It has been seen on RealView 2.2 built binaries,
11310 DW_TAG_template_type_param types actually _defined_ as
11311 children of the parent class:
11314 template class <class Enum> Class{};
11315 Class<enum E> class_e;
11317 1: DW_TAG_class_type (Class)
11318 2: DW_TAG_enumeration_type (E)
11319 3: DW_TAG_enumerator (enum1:0)
11320 3: DW_TAG_enumerator (enum2:1)
11322 2: DW_TAG_template_type_param
11323 DW_AT_type DW_FORM_ref_udata (E)
11325 Besides being broken debug info, it can put GDB into an
11326 infinite loop. Consider:
11328 When we're building the full name for Class<E>, we'll start
11329 at Class, and go look over its template type parameters,
11330 finding E. We'll then try to build the full name of E, and
11331 reach here. We're now trying to build the full name of E,
11332 and look over the parent DIE for containing scope. In the
11333 broken case, if we followed the parent DIE of E, we'd again
11334 find Class, and once again go look at its template type
11335 arguments, etc., etc. Simply don't consider such parent die
11336 as source-level parent of this die (it can't be, the language
11337 doesn't allow it), and break the loop here. */
11338 name
= dwarf2_name (die
, cu
);
11339 parent_name
= dwarf2_name (parent
, cu
);
11340 complaint (&symfile_complaints
,
11341 _("template param type '%s' defined within parent '%s'"),
11342 name
? name
: "<unknown>",
11343 parent_name
? parent_name
: "<unknown>");
11347 switch (parent
->tag
)
11349 case DW_TAG_namespace
:
11350 parent_type
= read_type_die (parent
, cu
);
11351 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11352 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11353 Work around this problem here. */
11354 if (cu
->language
== language_cplus
11355 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11357 /* We give a name to even anonymous namespaces. */
11358 return TYPE_TAG_NAME (parent_type
);
11359 case DW_TAG_class_type
:
11360 case DW_TAG_interface_type
:
11361 case DW_TAG_structure_type
:
11362 case DW_TAG_union_type
:
11363 case DW_TAG_module
:
11364 parent_type
= read_type_die (parent
, cu
);
11365 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11366 return TYPE_TAG_NAME (parent_type
);
11368 /* An anonymous structure is only allowed non-static data
11369 members; no typedefs, no member functions, et cetera.
11370 So it does not need a prefix. */
11373 return determine_prefix (parent
, cu
);
11377 /* Return a newly-allocated string formed by concatenating PREFIX and
11378 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11379 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11380 perform an obconcat, otherwise allocate storage for the result. The CU argument
11381 is used to determine the language and hence, the appropriate separator. */
11383 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11386 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11387 int physname
, struct dwarf2_cu
*cu
)
11389 const char *lead
= "";
11392 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11394 else if (cu
->language
== language_java
)
11396 else if (cu
->language
== language_fortran
&& physname
)
11398 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11399 DW_AT_MIPS_linkage_name is preferred and used instead. */
11407 if (prefix
== NULL
)
11409 if (suffix
== NULL
)
11414 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11416 strcpy (retval
, lead
);
11417 strcat (retval
, prefix
);
11418 strcat (retval
, sep
);
11419 strcat (retval
, suffix
);
11424 /* We have an obstack. */
11425 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11429 /* Return sibling of die, NULL if no sibling. */
11431 static struct die_info
*
11432 sibling_die (struct die_info
*die
)
11434 return die
->sibling
;
11437 /* Get name of a die, return NULL if not found. */
11440 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11441 struct obstack
*obstack
)
11443 if (name
&& cu
->language
== language_cplus
)
11445 char *canon_name
= cp_canonicalize_string (name
);
11447 if (canon_name
!= NULL
)
11449 if (strcmp (canon_name
, name
) != 0)
11450 name
= obsavestring (canon_name
, strlen (canon_name
),
11452 xfree (canon_name
);
11459 /* Get name of a die, return NULL if not found. */
11462 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11464 struct attribute
*attr
;
11466 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11467 if (!attr
|| !DW_STRING (attr
))
11472 case DW_TAG_compile_unit
:
11473 /* Compilation units have a DW_AT_name that is a filename, not
11474 a source language identifier. */
11475 case DW_TAG_enumeration_type
:
11476 case DW_TAG_enumerator
:
11477 /* These tags always have simple identifiers already; no need
11478 to canonicalize them. */
11479 return DW_STRING (attr
);
11481 case DW_TAG_subprogram
:
11482 /* Java constructors will all be named "<init>", so return
11483 the class name when we see this special case. */
11484 if (cu
->language
== language_java
11485 && DW_STRING (attr
) != NULL
11486 && strcmp (DW_STRING (attr
), "<init>") == 0)
11488 struct dwarf2_cu
*spec_cu
= cu
;
11489 struct die_info
*spec_die
;
11491 /* GCJ will output '<init>' for Java constructor names.
11492 For this special case, return the name of the parent class. */
11494 /* GCJ may output suprogram DIEs with AT_specification set.
11495 If so, use the name of the specified DIE. */
11496 spec_die
= die_specification (die
, &spec_cu
);
11497 if (spec_die
!= NULL
)
11498 return dwarf2_name (spec_die
, spec_cu
);
11503 if (die
->tag
== DW_TAG_class_type
)
11504 return dwarf2_name (die
, cu
);
11506 while (die
->tag
!= DW_TAG_compile_unit
);
11510 case DW_TAG_class_type
:
11511 case DW_TAG_interface_type
:
11512 case DW_TAG_structure_type
:
11513 case DW_TAG_union_type
:
11514 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11515 structures or unions. These were of the form "._%d" in GCC 4.1,
11516 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11517 and GCC 4.4. We work around this problem by ignoring these. */
11518 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11519 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11527 if (!DW_STRING_IS_CANONICAL (attr
))
11530 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11531 &cu
->objfile
->objfile_obstack
);
11532 DW_STRING_IS_CANONICAL (attr
) = 1;
11534 return DW_STRING (attr
);
11537 /* Return the die that this die in an extension of, or NULL if there
11538 is none. *EXT_CU is the CU containing DIE on input, and the CU
11539 containing the return value on output. */
11541 static struct die_info
*
11542 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11544 struct attribute
*attr
;
11546 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11550 return follow_die_ref (die
, attr
, ext_cu
);
11553 /* Convert a DIE tag into its string name. */
11556 dwarf_tag_name (unsigned tag
)
11560 case DW_TAG_padding
:
11561 return "DW_TAG_padding";
11562 case DW_TAG_array_type
:
11563 return "DW_TAG_array_type";
11564 case DW_TAG_class_type
:
11565 return "DW_TAG_class_type";
11566 case DW_TAG_entry_point
:
11567 return "DW_TAG_entry_point";
11568 case DW_TAG_enumeration_type
:
11569 return "DW_TAG_enumeration_type";
11570 case DW_TAG_formal_parameter
:
11571 return "DW_TAG_formal_parameter";
11572 case DW_TAG_imported_declaration
:
11573 return "DW_TAG_imported_declaration";
11575 return "DW_TAG_label";
11576 case DW_TAG_lexical_block
:
11577 return "DW_TAG_lexical_block";
11578 case DW_TAG_member
:
11579 return "DW_TAG_member";
11580 case DW_TAG_pointer_type
:
11581 return "DW_TAG_pointer_type";
11582 case DW_TAG_reference_type
:
11583 return "DW_TAG_reference_type";
11584 case DW_TAG_compile_unit
:
11585 return "DW_TAG_compile_unit";
11586 case DW_TAG_string_type
:
11587 return "DW_TAG_string_type";
11588 case DW_TAG_structure_type
:
11589 return "DW_TAG_structure_type";
11590 case DW_TAG_subroutine_type
:
11591 return "DW_TAG_subroutine_type";
11592 case DW_TAG_typedef
:
11593 return "DW_TAG_typedef";
11594 case DW_TAG_union_type
:
11595 return "DW_TAG_union_type";
11596 case DW_TAG_unspecified_parameters
:
11597 return "DW_TAG_unspecified_parameters";
11598 case DW_TAG_variant
:
11599 return "DW_TAG_variant";
11600 case DW_TAG_common_block
:
11601 return "DW_TAG_common_block";
11602 case DW_TAG_common_inclusion
:
11603 return "DW_TAG_common_inclusion";
11604 case DW_TAG_inheritance
:
11605 return "DW_TAG_inheritance";
11606 case DW_TAG_inlined_subroutine
:
11607 return "DW_TAG_inlined_subroutine";
11608 case DW_TAG_module
:
11609 return "DW_TAG_module";
11610 case DW_TAG_ptr_to_member_type
:
11611 return "DW_TAG_ptr_to_member_type";
11612 case DW_TAG_set_type
:
11613 return "DW_TAG_set_type";
11614 case DW_TAG_subrange_type
:
11615 return "DW_TAG_subrange_type";
11616 case DW_TAG_with_stmt
:
11617 return "DW_TAG_with_stmt";
11618 case DW_TAG_access_declaration
:
11619 return "DW_TAG_access_declaration";
11620 case DW_TAG_base_type
:
11621 return "DW_TAG_base_type";
11622 case DW_TAG_catch_block
:
11623 return "DW_TAG_catch_block";
11624 case DW_TAG_const_type
:
11625 return "DW_TAG_const_type";
11626 case DW_TAG_constant
:
11627 return "DW_TAG_constant";
11628 case DW_TAG_enumerator
:
11629 return "DW_TAG_enumerator";
11630 case DW_TAG_file_type
:
11631 return "DW_TAG_file_type";
11632 case DW_TAG_friend
:
11633 return "DW_TAG_friend";
11634 case DW_TAG_namelist
:
11635 return "DW_TAG_namelist";
11636 case DW_TAG_namelist_item
:
11637 return "DW_TAG_namelist_item";
11638 case DW_TAG_packed_type
:
11639 return "DW_TAG_packed_type";
11640 case DW_TAG_subprogram
:
11641 return "DW_TAG_subprogram";
11642 case DW_TAG_template_type_param
:
11643 return "DW_TAG_template_type_param";
11644 case DW_TAG_template_value_param
:
11645 return "DW_TAG_template_value_param";
11646 case DW_TAG_thrown_type
:
11647 return "DW_TAG_thrown_type";
11648 case DW_TAG_try_block
:
11649 return "DW_TAG_try_block";
11650 case DW_TAG_variant_part
:
11651 return "DW_TAG_variant_part";
11652 case DW_TAG_variable
:
11653 return "DW_TAG_variable";
11654 case DW_TAG_volatile_type
:
11655 return "DW_TAG_volatile_type";
11656 case DW_TAG_dwarf_procedure
:
11657 return "DW_TAG_dwarf_procedure";
11658 case DW_TAG_restrict_type
:
11659 return "DW_TAG_restrict_type";
11660 case DW_TAG_interface_type
:
11661 return "DW_TAG_interface_type";
11662 case DW_TAG_namespace
:
11663 return "DW_TAG_namespace";
11664 case DW_TAG_imported_module
:
11665 return "DW_TAG_imported_module";
11666 case DW_TAG_unspecified_type
:
11667 return "DW_TAG_unspecified_type";
11668 case DW_TAG_partial_unit
:
11669 return "DW_TAG_partial_unit";
11670 case DW_TAG_imported_unit
:
11671 return "DW_TAG_imported_unit";
11672 case DW_TAG_condition
:
11673 return "DW_TAG_condition";
11674 case DW_TAG_shared_type
:
11675 return "DW_TAG_shared_type";
11676 case DW_TAG_type_unit
:
11677 return "DW_TAG_type_unit";
11678 case DW_TAG_MIPS_loop
:
11679 return "DW_TAG_MIPS_loop";
11680 case DW_TAG_HP_array_descriptor
:
11681 return "DW_TAG_HP_array_descriptor";
11682 case DW_TAG_format_label
:
11683 return "DW_TAG_format_label";
11684 case DW_TAG_function_template
:
11685 return "DW_TAG_function_template";
11686 case DW_TAG_class_template
:
11687 return "DW_TAG_class_template";
11688 case DW_TAG_GNU_BINCL
:
11689 return "DW_TAG_GNU_BINCL";
11690 case DW_TAG_GNU_EINCL
:
11691 return "DW_TAG_GNU_EINCL";
11692 case DW_TAG_upc_shared_type
:
11693 return "DW_TAG_upc_shared_type";
11694 case DW_TAG_upc_strict_type
:
11695 return "DW_TAG_upc_strict_type";
11696 case DW_TAG_upc_relaxed_type
:
11697 return "DW_TAG_upc_relaxed_type";
11698 case DW_TAG_PGI_kanji_type
:
11699 return "DW_TAG_PGI_kanji_type";
11700 case DW_TAG_PGI_interface_block
:
11701 return "DW_TAG_PGI_interface_block";
11703 return "DW_TAG_<unknown>";
11707 /* Convert a DWARF attribute code into its string name. */
11710 dwarf_attr_name (unsigned attr
)
11714 case DW_AT_sibling
:
11715 return "DW_AT_sibling";
11716 case DW_AT_location
:
11717 return "DW_AT_location";
11719 return "DW_AT_name";
11720 case DW_AT_ordering
:
11721 return "DW_AT_ordering";
11722 case DW_AT_subscr_data
:
11723 return "DW_AT_subscr_data";
11724 case DW_AT_byte_size
:
11725 return "DW_AT_byte_size";
11726 case DW_AT_bit_offset
:
11727 return "DW_AT_bit_offset";
11728 case DW_AT_bit_size
:
11729 return "DW_AT_bit_size";
11730 case DW_AT_element_list
:
11731 return "DW_AT_element_list";
11732 case DW_AT_stmt_list
:
11733 return "DW_AT_stmt_list";
11735 return "DW_AT_low_pc";
11736 case DW_AT_high_pc
:
11737 return "DW_AT_high_pc";
11738 case DW_AT_language
:
11739 return "DW_AT_language";
11741 return "DW_AT_member";
11743 return "DW_AT_discr";
11744 case DW_AT_discr_value
:
11745 return "DW_AT_discr_value";
11746 case DW_AT_visibility
:
11747 return "DW_AT_visibility";
11749 return "DW_AT_import";
11750 case DW_AT_string_length
:
11751 return "DW_AT_string_length";
11752 case DW_AT_common_reference
:
11753 return "DW_AT_common_reference";
11754 case DW_AT_comp_dir
:
11755 return "DW_AT_comp_dir";
11756 case DW_AT_const_value
:
11757 return "DW_AT_const_value";
11758 case DW_AT_containing_type
:
11759 return "DW_AT_containing_type";
11760 case DW_AT_default_value
:
11761 return "DW_AT_default_value";
11763 return "DW_AT_inline";
11764 case DW_AT_is_optional
:
11765 return "DW_AT_is_optional";
11766 case DW_AT_lower_bound
:
11767 return "DW_AT_lower_bound";
11768 case DW_AT_producer
:
11769 return "DW_AT_producer";
11770 case DW_AT_prototyped
:
11771 return "DW_AT_prototyped";
11772 case DW_AT_return_addr
:
11773 return "DW_AT_return_addr";
11774 case DW_AT_start_scope
:
11775 return "DW_AT_start_scope";
11776 case DW_AT_bit_stride
:
11777 return "DW_AT_bit_stride";
11778 case DW_AT_upper_bound
:
11779 return "DW_AT_upper_bound";
11780 case DW_AT_abstract_origin
:
11781 return "DW_AT_abstract_origin";
11782 case DW_AT_accessibility
:
11783 return "DW_AT_accessibility";
11784 case DW_AT_address_class
:
11785 return "DW_AT_address_class";
11786 case DW_AT_artificial
:
11787 return "DW_AT_artificial";
11788 case DW_AT_base_types
:
11789 return "DW_AT_base_types";
11790 case DW_AT_calling_convention
:
11791 return "DW_AT_calling_convention";
11793 return "DW_AT_count";
11794 case DW_AT_data_member_location
:
11795 return "DW_AT_data_member_location";
11796 case DW_AT_decl_column
:
11797 return "DW_AT_decl_column";
11798 case DW_AT_decl_file
:
11799 return "DW_AT_decl_file";
11800 case DW_AT_decl_line
:
11801 return "DW_AT_decl_line";
11802 case DW_AT_declaration
:
11803 return "DW_AT_declaration";
11804 case DW_AT_discr_list
:
11805 return "DW_AT_discr_list";
11806 case DW_AT_encoding
:
11807 return "DW_AT_encoding";
11808 case DW_AT_external
:
11809 return "DW_AT_external";
11810 case DW_AT_frame_base
:
11811 return "DW_AT_frame_base";
11813 return "DW_AT_friend";
11814 case DW_AT_identifier_case
:
11815 return "DW_AT_identifier_case";
11816 case DW_AT_macro_info
:
11817 return "DW_AT_macro_info";
11818 case DW_AT_namelist_items
:
11819 return "DW_AT_namelist_items";
11820 case DW_AT_priority
:
11821 return "DW_AT_priority";
11822 case DW_AT_segment
:
11823 return "DW_AT_segment";
11824 case DW_AT_specification
:
11825 return "DW_AT_specification";
11826 case DW_AT_static_link
:
11827 return "DW_AT_static_link";
11829 return "DW_AT_type";
11830 case DW_AT_use_location
:
11831 return "DW_AT_use_location";
11832 case DW_AT_variable_parameter
:
11833 return "DW_AT_variable_parameter";
11834 case DW_AT_virtuality
:
11835 return "DW_AT_virtuality";
11836 case DW_AT_vtable_elem_location
:
11837 return "DW_AT_vtable_elem_location";
11838 /* DWARF 3 values. */
11839 case DW_AT_allocated
:
11840 return "DW_AT_allocated";
11841 case DW_AT_associated
:
11842 return "DW_AT_associated";
11843 case DW_AT_data_location
:
11844 return "DW_AT_data_location";
11845 case DW_AT_byte_stride
:
11846 return "DW_AT_byte_stride";
11847 case DW_AT_entry_pc
:
11848 return "DW_AT_entry_pc";
11849 case DW_AT_use_UTF8
:
11850 return "DW_AT_use_UTF8";
11851 case DW_AT_extension
:
11852 return "DW_AT_extension";
11854 return "DW_AT_ranges";
11855 case DW_AT_trampoline
:
11856 return "DW_AT_trampoline";
11857 case DW_AT_call_column
:
11858 return "DW_AT_call_column";
11859 case DW_AT_call_file
:
11860 return "DW_AT_call_file";
11861 case DW_AT_call_line
:
11862 return "DW_AT_call_line";
11863 case DW_AT_description
:
11864 return "DW_AT_description";
11865 case DW_AT_binary_scale
:
11866 return "DW_AT_binary_scale";
11867 case DW_AT_decimal_scale
:
11868 return "DW_AT_decimal_scale";
11870 return "DW_AT_small";
11871 case DW_AT_decimal_sign
:
11872 return "DW_AT_decimal_sign";
11873 case DW_AT_digit_count
:
11874 return "DW_AT_digit_count";
11875 case DW_AT_picture_string
:
11876 return "DW_AT_picture_string";
11877 case DW_AT_mutable
:
11878 return "DW_AT_mutable";
11879 case DW_AT_threads_scaled
:
11880 return "DW_AT_threads_scaled";
11881 case DW_AT_explicit
:
11882 return "DW_AT_explicit";
11883 case DW_AT_object_pointer
:
11884 return "DW_AT_object_pointer";
11885 case DW_AT_endianity
:
11886 return "DW_AT_endianity";
11887 case DW_AT_elemental
:
11888 return "DW_AT_elemental";
11890 return "DW_AT_pure";
11891 case DW_AT_recursive
:
11892 return "DW_AT_recursive";
11893 /* DWARF 4 values. */
11894 case DW_AT_signature
:
11895 return "DW_AT_signature";
11896 case DW_AT_linkage_name
:
11897 return "DW_AT_linkage_name";
11898 /* SGI/MIPS extensions. */
11899 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11900 case DW_AT_MIPS_fde
:
11901 return "DW_AT_MIPS_fde";
11903 case DW_AT_MIPS_loop_begin
:
11904 return "DW_AT_MIPS_loop_begin";
11905 case DW_AT_MIPS_tail_loop_begin
:
11906 return "DW_AT_MIPS_tail_loop_begin";
11907 case DW_AT_MIPS_epilog_begin
:
11908 return "DW_AT_MIPS_epilog_begin";
11909 case DW_AT_MIPS_loop_unroll_factor
:
11910 return "DW_AT_MIPS_loop_unroll_factor";
11911 case DW_AT_MIPS_software_pipeline_depth
:
11912 return "DW_AT_MIPS_software_pipeline_depth";
11913 case DW_AT_MIPS_linkage_name
:
11914 return "DW_AT_MIPS_linkage_name";
11915 case DW_AT_MIPS_stride
:
11916 return "DW_AT_MIPS_stride";
11917 case DW_AT_MIPS_abstract_name
:
11918 return "DW_AT_MIPS_abstract_name";
11919 case DW_AT_MIPS_clone_origin
:
11920 return "DW_AT_MIPS_clone_origin";
11921 case DW_AT_MIPS_has_inlines
:
11922 return "DW_AT_MIPS_has_inlines";
11923 /* HP extensions. */
11924 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11925 case DW_AT_HP_block_index
:
11926 return "DW_AT_HP_block_index";
11928 case DW_AT_HP_unmodifiable
:
11929 return "DW_AT_HP_unmodifiable";
11930 case DW_AT_HP_actuals_stmt_list
:
11931 return "DW_AT_HP_actuals_stmt_list";
11932 case DW_AT_HP_proc_per_section
:
11933 return "DW_AT_HP_proc_per_section";
11934 case DW_AT_HP_raw_data_ptr
:
11935 return "DW_AT_HP_raw_data_ptr";
11936 case DW_AT_HP_pass_by_reference
:
11937 return "DW_AT_HP_pass_by_reference";
11938 case DW_AT_HP_opt_level
:
11939 return "DW_AT_HP_opt_level";
11940 case DW_AT_HP_prof_version_id
:
11941 return "DW_AT_HP_prof_version_id";
11942 case DW_AT_HP_opt_flags
:
11943 return "DW_AT_HP_opt_flags";
11944 case DW_AT_HP_cold_region_low_pc
:
11945 return "DW_AT_HP_cold_region_low_pc";
11946 case DW_AT_HP_cold_region_high_pc
:
11947 return "DW_AT_HP_cold_region_high_pc";
11948 case DW_AT_HP_all_variables_modifiable
:
11949 return "DW_AT_HP_all_variables_modifiable";
11950 case DW_AT_HP_linkage_name
:
11951 return "DW_AT_HP_linkage_name";
11952 case DW_AT_HP_prof_flags
:
11953 return "DW_AT_HP_prof_flags";
11954 /* GNU extensions. */
11955 case DW_AT_sf_names
:
11956 return "DW_AT_sf_names";
11957 case DW_AT_src_info
:
11958 return "DW_AT_src_info";
11959 case DW_AT_mac_info
:
11960 return "DW_AT_mac_info";
11961 case DW_AT_src_coords
:
11962 return "DW_AT_src_coords";
11963 case DW_AT_body_begin
:
11964 return "DW_AT_body_begin";
11965 case DW_AT_body_end
:
11966 return "DW_AT_body_end";
11967 case DW_AT_GNU_vector
:
11968 return "DW_AT_GNU_vector";
11969 case DW_AT_GNU_odr_signature
:
11970 return "DW_AT_GNU_odr_signature";
11971 /* VMS extensions. */
11972 case DW_AT_VMS_rtnbeg_pd_address
:
11973 return "DW_AT_VMS_rtnbeg_pd_address";
11974 /* UPC extension. */
11975 case DW_AT_upc_threads_scaled
:
11976 return "DW_AT_upc_threads_scaled";
11977 /* PGI (STMicroelectronics) extensions. */
11978 case DW_AT_PGI_lbase
:
11979 return "DW_AT_PGI_lbase";
11980 case DW_AT_PGI_soffset
:
11981 return "DW_AT_PGI_soffset";
11982 case DW_AT_PGI_lstride
:
11983 return "DW_AT_PGI_lstride";
11985 return "DW_AT_<unknown>";
11989 /* Convert a DWARF value form code into its string name. */
11992 dwarf_form_name (unsigned form
)
11997 return "DW_FORM_addr";
11998 case DW_FORM_block2
:
11999 return "DW_FORM_block2";
12000 case DW_FORM_block4
:
12001 return "DW_FORM_block4";
12002 case DW_FORM_data2
:
12003 return "DW_FORM_data2";
12004 case DW_FORM_data4
:
12005 return "DW_FORM_data4";
12006 case DW_FORM_data8
:
12007 return "DW_FORM_data8";
12008 case DW_FORM_string
:
12009 return "DW_FORM_string";
12010 case DW_FORM_block
:
12011 return "DW_FORM_block";
12012 case DW_FORM_block1
:
12013 return "DW_FORM_block1";
12014 case DW_FORM_data1
:
12015 return "DW_FORM_data1";
12017 return "DW_FORM_flag";
12018 case DW_FORM_sdata
:
12019 return "DW_FORM_sdata";
12021 return "DW_FORM_strp";
12022 case DW_FORM_udata
:
12023 return "DW_FORM_udata";
12024 case DW_FORM_ref_addr
:
12025 return "DW_FORM_ref_addr";
12027 return "DW_FORM_ref1";
12029 return "DW_FORM_ref2";
12031 return "DW_FORM_ref4";
12033 return "DW_FORM_ref8";
12034 case DW_FORM_ref_udata
:
12035 return "DW_FORM_ref_udata";
12036 case DW_FORM_indirect
:
12037 return "DW_FORM_indirect";
12038 case DW_FORM_sec_offset
:
12039 return "DW_FORM_sec_offset";
12040 case DW_FORM_exprloc
:
12041 return "DW_FORM_exprloc";
12042 case DW_FORM_flag_present
:
12043 return "DW_FORM_flag_present";
12045 return "DW_FORM_sig8";
12047 return "DW_FORM_<unknown>";
12051 /* Convert a DWARF stack opcode into its string name. */
12054 dwarf_stack_op_name (unsigned op
, int def
)
12059 return "DW_OP_addr";
12061 return "DW_OP_deref";
12062 case DW_OP_const1u
:
12063 return "DW_OP_const1u";
12064 case DW_OP_const1s
:
12065 return "DW_OP_const1s";
12066 case DW_OP_const2u
:
12067 return "DW_OP_const2u";
12068 case DW_OP_const2s
:
12069 return "DW_OP_const2s";
12070 case DW_OP_const4u
:
12071 return "DW_OP_const4u";
12072 case DW_OP_const4s
:
12073 return "DW_OP_const4s";
12074 case DW_OP_const8u
:
12075 return "DW_OP_const8u";
12076 case DW_OP_const8s
:
12077 return "DW_OP_const8s";
12079 return "DW_OP_constu";
12081 return "DW_OP_consts";
12083 return "DW_OP_dup";
12085 return "DW_OP_drop";
12087 return "DW_OP_over";
12089 return "DW_OP_pick";
12091 return "DW_OP_swap";
12093 return "DW_OP_rot";
12095 return "DW_OP_xderef";
12097 return "DW_OP_abs";
12099 return "DW_OP_and";
12101 return "DW_OP_div";
12103 return "DW_OP_minus";
12105 return "DW_OP_mod";
12107 return "DW_OP_mul";
12109 return "DW_OP_neg";
12111 return "DW_OP_not";
12115 return "DW_OP_plus";
12116 case DW_OP_plus_uconst
:
12117 return "DW_OP_plus_uconst";
12119 return "DW_OP_shl";
12121 return "DW_OP_shr";
12123 return "DW_OP_shra";
12125 return "DW_OP_xor";
12127 return "DW_OP_bra";
12141 return "DW_OP_skip";
12143 return "DW_OP_lit0";
12145 return "DW_OP_lit1";
12147 return "DW_OP_lit2";
12149 return "DW_OP_lit3";
12151 return "DW_OP_lit4";
12153 return "DW_OP_lit5";
12155 return "DW_OP_lit6";
12157 return "DW_OP_lit7";
12159 return "DW_OP_lit8";
12161 return "DW_OP_lit9";
12163 return "DW_OP_lit10";
12165 return "DW_OP_lit11";
12167 return "DW_OP_lit12";
12169 return "DW_OP_lit13";
12171 return "DW_OP_lit14";
12173 return "DW_OP_lit15";
12175 return "DW_OP_lit16";
12177 return "DW_OP_lit17";
12179 return "DW_OP_lit18";
12181 return "DW_OP_lit19";
12183 return "DW_OP_lit20";
12185 return "DW_OP_lit21";
12187 return "DW_OP_lit22";
12189 return "DW_OP_lit23";
12191 return "DW_OP_lit24";
12193 return "DW_OP_lit25";
12195 return "DW_OP_lit26";
12197 return "DW_OP_lit27";
12199 return "DW_OP_lit28";
12201 return "DW_OP_lit29";
12203 return "DW_OP_lit30";
12205 return "DW_OP_lit31";
12207 return "DW_OP_reg0";
12209 return "DW_OP_reg1";
12211 return "DW_OP_reg2";
12213 return "DW_OP_reg3";
12215 return "DW_OP_reg4";
12217 return "DW_OP_reg5";
12219 return "DW_OP_reg6";
12221 return "DW_OP_reg7";
12223 return "DW_OP_reg8";
12225 return "DW_OP_reg9";
12227 return "DW_OP_reg10";
12229 return "DW_OP_reg11";
12231 return "DW_OP_reg12";
12233 return "DW_OP_reg13";
12235 return "DW_OP_reg14";
12237 return "DW_OP_reg15";
12239 return "DW_OP_reg16";
12241 return "DW_OP_reg17";
12243 return "DW_OP_reg18";
12245 return "DW_OP_reg19";
12247 return "DW_OP_reg20";
12249 return "DW_OP_reg21";
12251 return "DW_OP_reg22";
12253 return "DW_OP_reg23";
12255 return "DW_OP_reg24";
12257 return "DW_OP_reg25";
12259 return "DW_OP_reg26";
12261 return "DW_OP_reg27";
12263 return "DW_OP_reg28";
12265 return "DW_OP_reg29";
12267 return "DW_OP_reg30";
12269 return "DW_OP_reg31";
12271 return "DW_OP_breg0";
12273 return "DW_OP_breg1";
12275 return "DW_OP_breg2";
12277 return "DW_OP_breg3";
12279 return "DW_OP_breg4";
12281 return "DW_OP_breg5";
12283 return "DW_OP_breg6";
12285 return "DW_OP_breg7";
12287 return "DW_OP_breg8";
12289 return "DW_OP_breg9";
12291 return "DW_OP_breg10";
12293 return "DW_OP_breg11";
12295 return "DW_OP_breg12";
12297 return "DW_OP_breg13";
12299 return "DW_OP_breg14";
12301 return "DW_OP_breg15";
12303 return "DW_OP_breg16";
12305 return "DW_OP_breg17";
12307 return "DW_OP_breg18";
12309 return "DW_OP_breg19";
12311 return "DW_OP_breg20";
12313 return "DW_OP_breg21";
12315 return "DW_OP_breg22";
12317 return "DW_OP_breg23";
12319 return "DW_OP_breg24";
12321 return "DW_OP_breg25";
12323 return "DW_OP_breg26";
12325 return "DW_OP_breg27";
12327 return "DW_OP_breg28";
12329 return "DW_OP_breg29";
12331 return "DW_OP_breg30";
12333 return "DW_OP_breg31";
12335 return "DW_OP_regx";
12337 return "DW_OP_fbreg";
12339 return "DW_OP_bregx";
12341 return "DW_OP_piece";
12342 case DW_OP_deref_size
:
12343 return "DW_OP_deref_size";
12344 case DW_OP_xderef_size
:
12345 return "DW_OP_xderef_size";
12347 return "DW_OP_nop";
12348 /* DWARF 3 extensions. */
12349 case DW_OP_push_object_address
:
12350 return "DW_OP_push_object_address";
12352 return "DW_OP_call2";
12354 return "DW_OP_call4";
12355 case DW_OP_call_ref
:
12356 return "DW_OP_call_ref";
12357 case DW_OP_form_tls_address
:
12358 return "DW_OP_form_tls_address";
12359 case DW_OP_call_frame_cfa
:
12360 return "DW_OP_call_frame_cfa";
12361 case DW_OP_bit_piece
:
12362 return "DW_OP_bit_piece";
12363 /* DWARF 4 extensions. */
12364 case DW_OP_implicit_value
:
12365 return "DW_OP_implicit_value";
12366 case DW_OP_stack_value
:
12367 return "DW_OP_stack_value";
12368 /* GNU extensions. */
12369 case DW_OP_GNU_push_tls_address
:
12370 return "DW_OP_GNU_push_tls_address";
12371 case DW_OP_GNU_uninit
:
12372 return "DW_OP_GNU_uninit";
12374 return def
? "OP_<unknown>" : NULL
;
12379 dwarf_bool_name (unsigned mybool
)
12387 /* Convert a DWARF type code into its string name. */
12390 dwarf_type_encoding_name (unsigned enc
)
12395 return "DW_ATE_void";
12396 case DW_ATE_address
:
12397 return "DW_ATE_address";
12398 case DW_ATE_boolean
:
12399 return "DW_ATE_boolean";
12400 case DW_ATE_complex_float
:
12401 return "DW_ATE_complex_float";
12403 return "DW_ATE_float";
12404 case DW_ATE_signed
:
12405 return "DW_ATE_signed";
12406 case DW_ATE_signed_char
:
12407 return "DW_ATE_signed_char";
12408 case DW_ATE_unsigned
:
12409 return "DW_ATE_unsigned";
12410 case DW_ATE_unsigned_char
:
12411 return "DW_ATE_unsigned_char";
12413 case DW_ATE_imaginary_float
:
12414 return "DW_ATE_imaginary_float";
12415 case DW_ATE_packed_decimal
:
12416 return "DW_ATE_packed_decimal";
12417 case DW_ATE_numeric_string
:
12418 return "DW_ATE_numeric_string";
12419 case DW_ATE_edited
:
12420 return "DW_ATE_edited";
12421 case DW_ATE_signed_fixed
:
12422 return "DW_ATE_signed_fixed";
12423 case DW_ATE_unsigned_fixed
:
12424 return "DW_ATE_unsigned_fixed";
12425 case DW_ATE_decimal_float
:
12426 return "DW_ATE_decimal_float";
12429 return "DW_ATE_UTF";
12430 /* HP extensions. */
12431 case DW_ATE_HP_float80
:
12432 return "DW_ATE_HP_float80";
12433 case DW_ATE_HP_complex_float80
:
12434 return "DW_ATE_HP_complex_float80";
12435 case DW_ATE_HP_float128
:
12436 return "DW_ATE_HP_float128";
12437 case DW_ATE_HP_complex_float128
:
12438 return "DW_ATE_HP_complex_float128";
12439 case DW_ATE_HP_floathpintel
:
12440 return "DW_ATE_HP_floathpintel";
12441 case DW_ATE_HP_imaginary_float80
:
12442 return "DW_ATE_HP_imaginary_float80";
12443 case DW_ATE_HP_imaginary_float128
:
12444 return "DW_ATE_HP_imaginary_float128";
12446 return "DW_ATE_<unknown>";
12450 /* Convert a DWARF call frame info operation to its string name. */
12454 dwarf_cfi_name (unsigned cfi_opc
)
12458 case DW_CFA_advance_loc
:
12459 return "DW_CFA_advance_loc";
12460 case DW_CFA_offset
:
12461 return "DW_CFA_offset";
12462 case DW_CFA_restore
:
12463 return "DW_CFA_restore";
12465 return "DW_CFA_nop";
12466 case DW_CFA_set_loc
:
12467 return "DW_CFA_set_loc";
12468 case DW_CFA_advance_loc1
:
12469 return "DW_CFA_advance_loc1";
12470 case DW_CFA_advance_loc2
:
12471 return "DW_CFA_advance_loc2";
12472 case DW_CFA_advance_loc4
:
12473 return "DW_CFA_advance_loc4";
12474 case DW_CFA_offset_extended
:
12475 return "DW_CFA_offset_extended";
12476 case DW_CFA_restore_extended
:
12477 return "DW_CFA_restore_extended";
12478 case DW_CFA_undefined
:
12479 return "DW_CFA_undefined";
12480 case DW_CFA_same_value
:
12481 return "DW_CFA_same_value";
12482 case DW_CFA_register
:
12483 return "DW_CFA_register";
12484 case DW_CFA_remember_state
:
12485 return "DW_CFA_remember_state";
12486 case DW_CFA_restore_state
:
12487 return "DW_CFA_restore_state";
12488 case DW_CFA_def_cfa
:
12489 return "DW_CFA_def_cfa";
12490 case DW_CFA_def_cfa_register
:
12491 return "DW_CFA_def_cfa_register";
12492 case DW_CFA_def_cfa_offset
:
12493 return "DW_CFA_def_cfa_offset";
12495 case DW_CFA_def_cfa_expression
:
12496 return "DW_CFA_def_cfa_expression";
12497 case DW_CFA_expression
:
12498 return "DW_CFA_expression";
12499 case DW_CFA_offset_extended_sf
:
12500 return "DW_CFA_offset_extended_sf";
12501 case DW_CFA_def_cfa_sf
:
12502 return "DW_CFA_def_cfa_sf";
12503 case DW_CFA_def_cfa_offset_sf
:
12504 return "DW_CFA_def_cfa_offset_sf";
12505 case DW_CFA_val_offset
:
12506 return "DW_CFA_val_offset";
12507 case DW_CFA_val_offset_sf
:
12508 return "DW_CFA_val_offset_sf";
12509 case DW_CFA_val_expression
:
12510 return "DW_CFA_val_expression";
12511 /* SGI/MIPS specific. */
12512 case DW_CFA_MIPS_advance_loc8
:
12513 return "DW_CFA_MIPS_advance_loc8";
12514 /* GNU extensions. */
12515 case DW_CFA_GNU_window_save
:
12516 return "DW_CFA_GNU_window_save";
12517 case DW_CFA_GNU_args_size
:
12518 return "DW_CFA_GNU_args_size";
12519 case DW_CFA_GNU_negative_offset_extended
:
12520 return "DW_CFA_GNU_negative_offset_extended";
12522 return "DW_CFA_<unknown>";
12528 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12532 print_spaces (indent
, f
);
12533 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12534 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12536 if (die
->parent
!= NULL
)
12538 print_spaces (indent
, f
);
12539 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12540 die
->parent
->offset
);
12543 print_spaces (indent
, f
);
12544 fprintf_unfiltered (f
, " has children: %s\n",
12545 dwarf_bool_name (die
->child
!= NULL
));
12547 print_spaces (indent
, f
);
12548 fprintf_unfiltered (f
, " attributes:\n");
12550 for (i
= 0; i
< die
->num_attrs
; ++i
)
12552 print_spaces (indent
, f
);
12553 fprintf_unfiltered (f
, " %s (%s) ",
12554 dwarf_attr_name (die
->attrs
[i
].name
),
12555 dwarf_form_name (die
->attrs
[i
].form
));
12557 switch (die
->attrs
[i
].form
)
12559 case DW_FORM_ref_addr
:
12561 fprintf_unfiltered (f
, "address: ");
12562 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12564 case DW_FORM_block2
:
12565 case DW_FORM_block4
:
12566 case DW_FORM_block
:
12567 case DW_FORM_block1
:
12568 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12570 case DW_FORM_exprloc
:
12571 fprintf_unfiltered (f
, "expression: size %u",
12572 DW_BLOCK (&die
->attrs
[i
])->size
);
12577 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12578 (long) (DW_ADDR (&die
->attrs
[i
])));
12580 case DW_FORM_data1
:
12581 case DW_FORM_data2
:
12582 case DW_FORM_data4
:
12583 case DW_FORM_data8
:
12584 case DW_FORM_udata
:
12585 case DW_FORM_sdata
:
12586 fprintf_unfiltered (f
, "constant: %s",
12587 pulongest (DW_UNSND (&die
->attrs
[i
])));
12589 case DW_FORM_sec_offset
:
12590 fprintf_unfiltered (f
, "section offset: %s",
12591 pulongest (DW_UNSND (&die
->attrs
[i
])));
12594 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12595 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12596 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12598 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12600 case DW_FORM_string
:
12602 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12603 DW_STRING (&die
->attrs
[i
])
12604 ? DW_STRING (&die
->attrs
[i
]) : "",
12605 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12608 if (DW_UNSND (&die
->attrs
[i
]))
12609 fprintf_unfiltered (f
, "flag: TRUE");
12611 fprintf_unfiltered (f
, "flag: FALSE");
12613 case DW_FORM_flag_present
:
12614 fprintf_unfiltered (f
, "flag: TRUE");
12616 case DW_FORM_indirect
:
12617 /* the reader will have reduced the indirect form to
12618 the "base form" so this form should not occur */
12619 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12622 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12623 die
->attrs
[i
].form
);
12626 fprintf_unfiltered (f
, "\n");
12631 dump_die_for_error (struct die_info
*die
)
12633 dump_die_shallow (gdb_stderr
, 0, die
);
12637 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12639 int indent
= level
* 4;
12641 gdb_assert (die
!= NULL
);
12643 if (level
>= max_level
)
12646 dump_die_shallow (f
, indent
, die
);
12648 if (die
->child
!= NULL
)
12650 print_spaces (indent
, f
);
12651 fprintf_unfiltered (f
, " Children:");
12652 if (level
+ 1 < max_level
)
12654 fprintf_unfiltered (f
, "\n");
12655 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12659 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12663 if (die
->sibling
!= NULL
&& level
> 0)
12665 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12669 /* This is called from the pdie macro in gdbinit.in.
12670 It's not static so gcc will keep a copy callable from gdb. */
12673 dump_die (struct die_info
*die
, int max_level
)
12675 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12679 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12683 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12689 is_ref_attr (struct attribute
*attr
)
12691 switch (attr
->form
)
12693 case DW_FORM_ref_addr
:
12698 case DW_FORM_ref_udata
:
12705 static unsigned int
12706 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12708 if (is_ref_attr (attr
))
12709 return DW_ADDR (attr
);
12711 complaint (&symfile_complaints
,
12712 _("unsupported die ref attribute form: '%s'"),
12713 dwarf_form_name (attr
->form
));
12717 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12718 * the value held by the attribute is not constant. */
12721 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12723 if (attr
->form
== DW_FORM_sdata
)
12724 return DW_SND (attr
);
12725 else if (attr
->form
== DW_FORM_udata
12726 || attr
->form
== DW_FORM_data1
12727 || attr
->form
== DW_FORM_data2
12728 || attr
->form
== DW_FORM_data4
12729 || attr
->form
== DW_FORM_data8
)
12730 return DW_UNSND (attr
);
12733 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12734 dwarf_form_name (attr
->form
));
12735 return default_value
;
12739 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12740 unit and add it to our queue.
12741 The result is non-zero if PER_CU was queued, otherwise the result is zero
12742 meaning either PER_CU is already queued or it is already loaded. */
12745 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12746 struct dwarf2_per_cu_data
*per_cu
)
12748 /* We may arrive here during partial symbol reading, if we need full
12749 DIEs to process an unusual case (e.g. template arguments). Do
12750 not queue PER_CU, just tell our caller to load its DIEs. */
12751 if (dwarf2_per_objfile
->reading_partial_symbols
)
12753 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12758 /* Mark the dependence relation so that we don't flush PER_CU
12760 dwarf2_add_dependence (this_cu
, per_cu
);
12762 /* If it's already on the queue, we have nothing to do. */
12763 if (per_cu
->queued
)
12766 /* If the compilation unit is already loaded, just mark it as
12768 if (per_cu
->cu
!= NULL
)
12770 per_cu
->cu
->last_used
= 0;
12774 /* Add it to the queue. */
12775 queue_comp_unit (per_cu
, this_cu
->objfile
);
12780 /* Follow reference or signature attribute ATTR of SRC_DIE.
12781 On entry *REF_CU is the CU of SRC_DIE.
12782 On exit *REF_CU is the CU of the result. */
12784 static struct die_info
*
12785 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12786 struct dwarf2_cu
**ref_cu
)
12788 struct die_info
*die
;
12790 if (is_ref_attr (attr
))
12791 die
= follow_die_ref (src_die
, attr
, ref_cu
);
12792 else if (attr
->form
== DW_FORM_sig8
)
12793 die
= follow_die_sig (src_die
, attr
, ref_cu
);
12796 dump_die_for_error (src_die
);
12797 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12798 (*ref_cu
)->objfile
->name
);
12804 /* Follow reference OFFSET.
12805 On entry *REF_CU is the CU of the source die referencing OFFSET.
12806 On exit *REF_CU is the CU of the result.
12807 Returns NULL if OFFSET is invalid. */
12809 static struct die_info
*
12810 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
12812 struct die_info temp_die
;
12813 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
12815 gdb_assert (cu
->per_cu
!= NULL
);
12819 if (cu
->per_cu
->from_debug_types
)
12821 /* .debug_types CUs cannot reference anything outside their CU.
12822 If they need to, they have to reference a signatured type via
12824 if (! offset_in_cu_p (&cu
->header
, offset
))
12827 else if (! offset_in_cu_p (&cu
->header
, offset
))
12829 struct dwarf2_per_cu_data
*per_cu
;
12831 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
12833 /* If necessary, add it to the queue and load its DIEs. */
12834 if (maybe_queue_comp_unit (cu
, per_cu
))
12835 load_full_comp_unit (per_cu
, cu
->objfile
);
12837 target_cu
= per_cu
->cu
;
12839 else if (cu
->dies
== NULL
)
12841 /* We're loading full DIEs during partial symbol reading. */
12842 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
12843 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
12846 *ref_cu
= target_cu
;
12847 temp_die
.offset
= offset
;
12848 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
12851 /* Follow reference attribute ATTR of SRC_DIE.
12852 On entry *REF_CU is the CU of SRC_DIE.
12853 On exit *REF_CU is the CU of the result. */
12855 static struct die_info
*
12856 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
12857 struct dwarf2_cu
**ref_cu
)
12859 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12860 struct dwarf2_cu
*cu
= *ref_cu
;
12861 struct die_info
*die
;
12863 die
= follow_die_offset (offset
, ref_cu
);
12865 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12866 "at 0x%x [in module %s]"),
12867 offset
, src_die
->offset
, cu
->objfile
->name
);
12872 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12873 value is intended for DW_OP_call*. */
12875 struct dwarf2_locexpr_baton
12876 dwarf2_fetch_die_location_block (unsigned int offset
,
12877 struct dwarf2_per_cu_data
*per_cu
)
12879 struct dwarf2_cu
*cu
= per_cu
->cu
;
12880 struct die_info
*die
;
12881 struct attribute
*attr
;
12882 struct dwarf2_locexpr_baton retval
;
12884 die
= follow_die_offset (offset
, &cu
);
12886 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12887 offset
, per_cu
->cu
->objfile
->name
);
12889 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12892 /* DWARF: "If there is no such attribute, then there is no effect.". */
12894 retval
.data
= NULL
;
12899 if (!attr_form_is_block (attr
))
12900 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12901 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12902 offset
, per_cu
->cu
->objfile
->name
);
12904 retval
.data
= DW_BLOCK (attr
)->data
;
12905 retval
.size
= DW_BLOCK (attr
)->size
;
12907 retval
.per_cu
= cu
->per_cu
;
12911 /* Follow the signature attribute ATTR in SRC_DIE.
12912 On entry *REF_CU is the CU of SRC_DIE.
12913 On exit *REF_CU is the CU of the result. */
12915 static struct die_info
*
12916 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
12917 struct dwarf2_cu
**ref_cu
)
12919 struct objfile
*objfile
= (*ref_cu
)->objfile
;
12920 struct die_info temp_die
;
12921 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12922 struct dwarf2_cu
*sig_cu
;
12923 struct die_info
*die
;
12925 /* sig_type will be NULL if the signatured type is missing from
12927 if (sig_type
== NULL
)
12928 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12929 "at 0x%x [in module %s]"),
12930 src_die
->offset
, objfile
->name
);
12932 /* If necessary, add it to the queue and load its DIEs. */
12934 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
12935 read_signatured_type (objfile
, sig_type
);
12937 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
12939 sig_cu
= sig_type
->per_cu
.cu
;
12940 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
12941 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
12948 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12949 "at 0x%x [in module %s]"),
12950 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
12953 /* Given an offset of a signatured type, return its signatured_type. */
12955 static struct signatured_type
*
12956 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
12958 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
12959 unsigned int length
, initial_length_size
;
12960 unsigned int sig_offset
;
12961 struct signatured_type find_entry
, *type_sig
;
12963 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
12964 sig_offset
= (initial_length_size
12966 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
12967 + 1 /*address_size*/);
12968 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
12969 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
12971 /* This is only used to lookup previously recorded types.
12972 If we didn't find it, it's our bug. */
12973 gdb_assert (type_sig
!= NULL
);
12974 gdb_assert (offset
== type_sig
->offset
);
12979 /* Read in signatured type at OFFSET and build its CU and die(s). */
12982 read_signatured_type_at_offset (struct objfile
*objfile
,
12983 unsigned int offset
)
12985 struct signatured_type
*type_sig
;
12987 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
12989 /* We have the section offset, but we need the signature to do the
12990 hash table lookup. */
12991 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
12993 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
12995 read_signatured_type (objfile
, type_sig
);
12997 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13000 /* Read in a signatured type and build its CU and DIEs. */
13003 read_signatured_type (struct objfile
*objfile
,
13004 struct signatured_type
*type_sig
)
13006 gdb_byte
*types_ptr
;
13007 struct die_reader_specs reader_specs
;
13008 struct dwarf2_cu
*cu
;
13009 ULONGEST signature
;
13010 struct cleanup
*back_to
, *free_cu_cleanup
;
13011 struct attribute
*attr
;
13013 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13014 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13016 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13018 cu
= xmalloc (sizeof (struct dwarf2_cu
));
13019 memset (cu
, 0, sizeof (struct dwarf2_cu
));
13020 obstack_init (&cu
->comp_unit_obstack
);
13021 cu
->objfile
= objfile
;
13022 type_sig
->per_cu
.cu
= cu
;
13023 cu
->per_cu
= &type_sig
->per_cu
;
13025 /* If an error occurs while loading, release our storage. */
13026 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13028 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13029 types_ptr
, objfile
->obfd
);
13030 gdb_assert (signature
== type_sig
->signature
);
13033 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13037 &cu
->comp_unit_obstack
,
13038 hashtab_obstack_allocate
,
13039 dummy_obstack_deallocate
);
13041 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13042 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13044 init_cu_die_reader (&reader_specs
, cu
);
13046 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13049 /* We try not to read any attributes in this function, because not
13050 all objfiles needed for references have been loaded yet, and symbol
13051 table processing isn't initialized. But we have to set the CU language,
13052 or we won't be able to build types correctly. */
13053 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
13055 set_cu_language (DW_UNSND (attr
), cu
);
13057 set_cu_language (language_minimal
, cu
);
13059 do_cleanups (back_to
);
13061 /* We've successfully allocated this compilation unit. Let our caller
13062 clean it up when finished with it. */
13063 discard_cleanups (free_cu_cleanup
);
13065 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13066 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13069 /* Decode simple location descriptions.
13070 Given a pointer to a dwarf block that defines a location, compute
13071 the location and return the value.
13073 NOTE drow/2003-11-18: This function is called in two situations
13074 now: for the address of static or global variables (partial symbols
13075 only) and for offsets into structures which are expected to be
13076 (more or less) constant. The partial symbol case should go away,
13077 and only the constant case should remain. That will let this
13078 function complain more accurately. A few special modes are allowed
13079 without complaint for global variables (for instance, global
13080 register values and thread-local values).
13082 A location description containing no operations indicates that the
13083 object is optimized out. The return value is 0 for that case.
13084 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13085 callers will only want a very basic result and this can become a
13088 Note that stack[0] is unused except as a default error return.
13089 Note that stack overflow is not yet handled. */
13092 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13094 struct objfile
*objfile
= cu
->objfile
;
13096 int size
= blk
->size
;
13097 gdb_byte
*data
= blk
->data
;
13098 CORE_ADDR stack
[64];
13100 unsigned int bytes_read
, unsnd
;
13144 stack
[++stacki
] = op
- DW_OP_lit0
;
13179 stack
[++stacki
] = op
- DW_OP_reg0
;
13181 dwarf2_complex_location_expr_complaint ();
13185 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13187 stack
[++stacki
] = unsnd
;
13189 dwarf2_complex_location_expr_complaint ();
13193 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13198 case DW_OP_const1u
:
13199 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13203 case DW_OP_const1s
:
13204 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13208 case DW_OP_const2u
:
13209 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13213 case DW_OP_const2s
:
13214 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13218 case DW_OP_const4u
:
13219 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13223 case DW_OP_const4s
:
13224 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13229 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13235 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13240 stack
[stacki
+ 1] = stack
[stacki
];
13245 stack
[stacki
- 1] += stack
[stacki
];
13249 case DW_OP_plus_uconst
:
13250 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13255 stack
[stacki
- 1] -= stack
[stacki
];
13260 /* If we're not the last op, then we definitely can't encode
13261 this using GDB's address_class enum. This is valid for partial
13262 global symbols, although the variable's address will be bogus
13265 dwarf2_complex_location_expr_complaint ();
13268 case DW_OP_GNU_push_tls_address
:
13269 /* The top of the stack has the offset from the beginning
13270 of the thread control block at which the variable is located. */
13271 /* Nothing should follow this operator, so the top of stack would
13273 /* This is valid for partial global symbols, but the variable's
13274 address will be bogus in the psymtab. */
13276 dwarf2_complex_location_expr_complaint ();
13279 case DW_OP_GNU_uninit
:
13283 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13284 dwarf_stack_op_name (op
, 1));
13285 return (stack
[stacki
]);
13288 return (stack
[stacki
]);
13291 /* memory allocation interface */
13293 static struct dwarf_block
*
13294 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13296 struct dwarf_block
*blk
;
13298 blk
= (struct dwarf_block
*)
13299 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13303 static struct abbrev_info
*
13304 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13306 struct abbrev_info
*abbrev
;
13308 abbrev
= (struct abbrev_info
*)
13309 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13310 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13314 static struct die_info
*
13315 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13317 struct die_info
*die
;
13318 size_t size
= sizeof (struct die_info
);
13321 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13323 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13324 memset (die
, 0, sizeof (struct die_info
));
13329 /* Macro support. */
13332 /* Return the full name of file number I in *LH's file name table.
13333 Use COMP_DIR as the name of the current directory of the
13334 compilation. The result is allocated using xmalloc; the caller is
13335 responsible for freeing it. */
13337 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13339 /* Is the file number a valid index into the line header's file name
13340 table? Remember that file numbers start with one, not zero. */
13341 if (1 <= file
&& file
<= lh
->num_file_names
)
13343 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13345 if (IS_ABSOLUTE_PATH (fe
->name
))
13346 return xstrdup (fe
->name
);
13354 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13360 dir_len
= strlen (dir
);
13361 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13362 strcpy (full_name
, dir
);
13363 full_name
[dir_len
] = '/';
13364 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13368 return xstrdup (fe
->name
);
13373 /* The compiler produced a bogus file number. We can at least
13374 record the macro definitions made in the file, even if we
13375 won't be able to find the file by name. */
13376 char fake_name
[80];
13378 sprintf (fake_name
, "<bad macro file number %d>", file
);
13380 complaint (&symfile_complaints
,
13381 _("bad file number in macro information (%d)"),
13384 return xstrdup (fake_name
);
13389 static struct macro_source_file
*
13390 macro_start_file (int file
, int line
,
13391 struct macro_source_file
*current_file
,
13392 const char *comp_dir
,
13393 struct line_header
*lh
, struct objfile
*objfile
)
13395 /* The full name of this source file. */
13396 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13398 /* We don't create a macro table for this compilation unit
13399 at all until we actually get a filename. */
13400 if (! pending_macros
)
13401 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13402 objfile
->macro_cache
);
13404 if (! current_file
)
13405 /* If we have no current file, then this must be the start_file
13406 directive for the compilation unit's main source file. */
13407 current_file
= macro_set_main (pending_macros
, full_name
);
13409 current_file
= macro_include (current_file
, line
, full_name
);
13413 return current_file
;
13417 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13418 followed by a null byte. */
13420 copy_string (const char *buf
, int len
)
13422 char *s
= xmalloc (len
+ 1);
13424 memcpy (s
, buf
, len
);
13430 static const char *
13431 consume_improper_spaces (const char *p
, const char *body
)
13435 complaint (&symfile_complaints
,
13436 _("macro definition contains spaces in formal argument list:\n`%s'"),
13448 parse_macro_definition (struct macro_source_file
*file
, int line
,
13453 /* The body string takes one of two forms. For object-like macro
13454 definitions, it should be:
13456 <macro name> " " <definition>
13458 For function-like macro definitions, it should be:
13460 <macro name> "() " <definition>
13462 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13464 Spaces may appear only where explicitly indicated, and in the
13467 The Dwarf 2 spec says that an object-like macro's name is always
13468 followed by a space, but versions of GCC around March 2002 omit
13469 the space when the macro's definition is the empty string.
13471 The Dwarf 2 spec says that there should be no spaces between the
13472 formal arguments in a function-like macro's formal argument list,
13473 but versions of GCC around March 2002 include spaces after the
13477 /* Find the extent of the macro name. The macro name is terminated
13478 by either a space or null character (for an object-like macro) or
13479 an opening paren (for a function-like macro). */
13480 for (p
= body
; *p
; p
++)
13481 if (*p
== ' ' || *p
== '(')
13484 if (*p
== ' ' || *p
== '\0')
13486 /* It's an object-like macro. */
13487 int name_len
= p
- body
;
13488 char *name
= copy_string (body
, name_len
);
13489 const char *replacement
;
13492 replacement
= body
+ name_len
+ 1;
13495 dwarf2_macro_malformed_definition_complaint (body
);
13496 replacement
= body
+ name_len
;
13499 macro_define_object (file
, line
, name
, replacement
);
13503 else if (*p
== '(')
13505 /* It's a function-like macro. */
13506 char *name
= copy_string (body
, p
- body
);
13509 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13513 p
= consume_improper_spaces (p
, body
);
13515 /* Parse the formal argument list. */
13516 while (*p
&& *p
!= ')')
13518 /* Find the extent of the current argument name. */
13519 const char *arg_start
= p
;
13521 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13524 if (! *p
|| p
== arg_start
)
13525 dwarf2_macro_malformed_definition_complaint (body
);
13528 /* Make sure argv has room for the new argument. */
13529 if (argc
>= argv_size
)
13532 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13535 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13538 p
= consume_improper_spaces (p
, body
);
13540 /* Consume the comma, if present. */
13545 p
= consume_improper_spaces (p
, body
);
13554 /* Perfectly formed definition, no complaints. */
13555 macro_define_function (file
, line
, name
,
13556 argc
, (const char **) argv
,
13558 else if (*p
== '\0')
13560 /* Complain, but do define it. */
13561 dwarf2_macro_malformed_definition_complaint (body
);
13562 macro_define_function (file
, line
, name
,
13563 argc
, (const char **) argv
,
13567 /* Just complain. */
13568 dwarf2_macro_malformed_definition_complaint (body
);
13571 /* Just complain. */
13572 dwarf2_macro_malformed_definition_complaint (body
);
13578 for (i
= 0; i
< argc
; i
++)
13584 dwarf2_macro_malformed_definition_complaint (body
);
13589 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13590 char *comp_dir
, bfd
*abfd
,
13591 struct dwarf2_cu
*cu
)
13593 gdb_byte
*mac_ptr
, *mac_end
;
13594 struct macro_source_file
*current_file
= 0;
13595 enum dwarf_macinfo_record_type macinfo_type
;
13596 int at_commandline
;
13598 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13599 &dwarf2_per_objfile
->macinfo
);
13600 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13602 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13606 /* First pass: Find the name of the base filename.
13607 This filename is needed in order to process all macros whose definition
13608 (or undefinition) comes from the command line. These macros are defined
13609 before the first DW_MACINFO_start_file entry, and yet still need to be
13610 associated to the base file.
13612 To determine the base file name, we scan the macro definitions until we
13613 reach the first DW_MACINFO_start_file entry. We then initialize
13614 CURRENT_FILE accordingly so that any macro definition found before the
13615 first DW_MACINFO_start_file can still be associated to the base file. */
13617 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13618 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13619 + dwarf2_per_objfile
->macinfo
.size
;
13623 /* Do we at least have room for a macinfo type byte? */
13624 if (mac_ptr
>= mac_end
)
13626 /* Complaint is printed during the second pass as GDB will probably
13627 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13631 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13634 switch (macinfo_type
)
13636 /* A zero macinfo type indicates the end of the macro
13641 case DW_MACINFO_define
:
13642 case DW_MACINFO_undef
:
13643 /* Only skip the data by MAC_PTR. */
13645 unsigned int bytes_read
;
13647 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13648 mac_ptr
+= bytes_read
;
13649 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13650 mac_ptr
+= bytes_read
;
13654 case DW_MACINFO_start_file
:
13656 unsigned int bytes_read
;
13659 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13660 mac_ptr
+= bytes_read
;
13661 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13662 mac_ptr
+= bytes_read
;
13664 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13669 case DW_MACINFO_end_file
:
13670 /* No data to skip by MAC_PTR. */
13673 case DW_MACINFO_vendor_ext
:
13674 /* Only skip the data by MAC_PTR. */
13676 unsigned int bytes_read
;
13678 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13679 mac_ptr
+= bytes_read
;
13680 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13681 mac_ptr
+= bytes_read
;
13688 } while (macinfo_type
!= 0 && current_file
== NULL
);
13690 /* Second pass: Process all entries.
13692 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13693 command-line macro definitions/undefinitions. This flag is unset when we
13694 reach the first DW_MACINFO_start_file entry. */
13696 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13698 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13699 GDB is still reading the definitions from command line. First
13700 DW_MACINFO_start_file will need to be ignored as it was already executed
13701 to create CURRENT_FILE for the main source holding also the command line
13702 definitions. On first met DW_MACINFO_start_file this flag is reset to
13703 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13705 at_commandline
= 1;
13709 /* Do we at least have room for a macinfo type byte? */
13710 if (mac_ptr
>= mac_end
)
13712 dwarf2_macros_too_long_complaint ();
13716 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13719 switch (macinfo_type
)
13721 /* A zero macinfo type indicates the end of the macro
13726 case DW_MACINFO_define
:
13727 case DW_MACINFO_undef
:
13729 unsigned int bytes_read
;
13733 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13734 mac_ptr
+= bytes_read
;
13735 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13736 mac_ptr
+= bytes_read
;
13738 if (! current_file
)
13740 /* DWARF violation as no main source is present. */
13741 complaint (&symfile_complaints
,
13742 _("debug info with no main source gives macro %s "
13744 macinfo_type
== DW_MACINFO_define
?
13746 macinfo_type
== DW_MACINFO_undef
?
13747 _("undefinition") :
13748 _("something-or-other"), line
, body
);
13751 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13752 complaint (&symfile_complaints
,
13753 _("debug info gives %s macro %s with %s line %d: %s"),
13754 at_commandline
? _("command-line") : _("in-file"),
13755 macinfo_type
== DW_MACINFO_define
?
13757 macinfo_type
== DW_MACINFO_undef
?
13758 _("undefinition") :
13759 _("something-or-other"),
13760 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13762 if (macinfo_type
== DW_MACINFO_define
)
13763 parse_macro_definition (current_file
, line
, body
);
13764 else if (macinfo_type
== DW_MACINFO_undef
)
13765 macro_undef (current_file
, line
, body
);
13769 case DW_MACINFO_start_file
:
13771 unsigned int bytes_read
;
13774 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13775 mac_ptr
+= bytes_read
;
13776 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13777 mac_ptr
+= bytes_read
;
13779 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13780 complaint (&symfile_complaints
,
13781 _("debug info gives source %d included "
13782 "from %s at %s line %d"),
13783 file
, at_commandline
? _("command-line") : _("file"),
13784 line
== 0 ? _("zero") : _("non-zero"), line
);
13786 if (at_commandline
)
13788 /* This DW_MACINFO_start_file was executed in the pass one. */
13789 at_commandline
= 0;
13792 current_file
= macro_start_file (file
, line
,
13793 current_file
, comp_dir
,
13798 case DW_MACINFO_end_file
:
13799 if (! current_file
)
13800 complaint (&symfile_complaints
,
13801 _("macro debug info has an unmatched `close_file' directive"));
13804 current_file
= current_file
->included_by
;
13805 if (! current_file
)
13807 enum dwarf_macinfo_record_type next_type
;
13809 /* GCC circa March 2002 doesn't produce the zero
13810 type byte marking the end of the compilation
13811 unit. Complain if it's not there, but exit no
13814 /* Do we at least have room for a macinfo type byte? */
13815 if (mac_ptr
>= mac_end
)
13817 dwarf2_macros_too_long_complaint ();
13821 /* We don't increment mac_ptr here, so this is just
13823 next_type
= read_1_byte (abfd
, mac_ptr
);
13824 if (next_type
!= 0)
13825 complaint (&symfile_complaints
,
13826 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13833 case DW_MACINFO_vendor_ext
:
13835 unsigned int bytes_read
;
13839 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13840 mac_ptr
+= bytes_read
;
13841 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13842 mac_ptr
+= bytes_read
;
13844 /* We don't recognize any vendor extensions. */
13848 } while (macinfo_type
!= 0);
13851 /* Check if the attribute's form is a DW_FORM_block*
13852 if so return true else false. */
13854 attr_form_is_block (struct attribute
*attr
)
13856 return (attr
== NULL
? 0 :
13857 attr
->form
== DW_FORM_block1
13858 || attr
->form
== DW_FORM_block2
13859 || attr
->form
== DW_FORM_block4
13860 || attr
->form
== DW_FORM_block
13861 || attr
->form
== DW_FORM_exprloc
);
13864 /* Return non-zero if ATTR's value is a section offset --- classes
13865 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13866 You may use DW_UNSND (attr) to retrieve such offsets.
13868 Section 7.5.4, "Attribute Encodings", explains that no attribute
13869 may have a value that belongs to more than one of these classes; it
13870 would be ambiguous if we did, because we use the same forms for all
13873 attr_form_is_section_offset (struct attribute
*attr
)
13875 return (attr
->form
== DW_FORM_data4
13876 || attr
->form
== DW_FORM_data8
13877 || attr
->form
== DW_FORM_sec_offset
);
13881 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13882 zero otherwise. When this function returns true, you can apply
13883 dwarf2_get_attr_constant_value to it.
13885 However, note that for some attributes you must check
13886 attr_form_is_section_offset before using this test. DW_FORM_data4
13887 and DW_FORM_data8 are members of both the constant class, and of
13888 the classes that contain offsets into other debug sections
13889 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13890 that, if an attribute's can be either a constant or one of the
13891 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13892 taken as section offsets, not constants. */
13894 attr_form_is_constant (struct attribute
*attr
)
13896 switch (attr
->form
)
13898 case DW_FORM_sdata
:
13899 case DW_FORM_udata
:
13900 case DW_FORM_data1
:
13901 case DW_FORM_data2
:
13902 case DW_FORM_data4
:
13903 case DW_FORM_data8
:
13911 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
13912 struct dwarf2_cu
*cu
)
13914 if (attr_form_is_section_offset (attr
)
13915 /* ".debug_loc" may not exist at all, or the offset may be outside
13916 the section. If so, fall through to the complaint in the
13918 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
13920 struct dwarf2_loclist_baton
*baton
;
13922 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13923 sizeof (struct dwarf2_loclist_baton
));
13924 baton
->per_cu
= cu
->per_cu
;
13925 gdb_assert (baton
->per_cu
);
13927 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13928 &dwarf2_per_objfile
->loc
);
13930 /* We don't know how long the location list is, but make sure we
13931 don't run off the edge of the section. */
13932 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
13933 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
13934 baton
->base_address
= cu
->base_address
;
13935 if (cu
->base_known
== 0)
13936 complaint (&symfile_complaints
,
13937 _("Location list used without specifying the CU base address."));
13939 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
13940 SYMBOL_LOCATION_BATON (sym
) = baton
;
13944 struct dwarf2_locexpr_baton
*baton
;
13946 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13947 sizeof (struct dwarf2_locexpr_baton
));
13948 baton
->per_cu
= cu
->per_cu
;
13949 gdb_assert (baton
->per_cu
);
13951 if (attr_form_is_block (attr
))
13953 /* Note that we're just copying the block's data pointer
13954 here, not the actual data. We're still pointing into the
13955 info_buffer for SYM's objfile; right now we never release
13956 that buffer, but when we do clean up properly this may
13958 baton
->size
= DW_BLOCK (attr
)->size
;
13959 baton
->data
= DW_BLOCK (attr
)->data
;
13963 dwarf2_invalid_attrib_class_complaint ("location description",
13964 SYMBOL_NATURAL_NAME (sym
));
13966 baton
->data
= NULL
;
13969 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13970 SYMBOL_LOCATION_BATON (sym
) = baton
;
13974 /* Return the OBJFILE associated with the compilation unit CU. If CU
13975 came from a separate debuginfo file, then the master objfile is
13979 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
13981 struct objfile
*objfile
= per_cu
->objfile
;
13983 /* Return the master objfile, so that we can report and look up the
13984 correct file containing this variable. */
13985 if (objfile
->separate_debug_objfile_backlink
)
13986 objfile
= objfile
->separate_debug_objfile_backlink
;
13991 /* Return the address size given in the compilation unit header for CU. */
13994 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
13997 return per_cu
->cu
->header
.addr_size
;
14000 /* If the CU is not currently read in, we re-read its header. */
14001 struct objfile
*objfile
= per_cu
->objfile
;
14002 struct dwarf2_per_objfile
*per_objfile
14003 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14004 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14005 struct comp_unit_head cu_header
;
14007 memset (&cu_header
, 0, sizeof cu_header
);
14008 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14009 return cu_header
.addr_size
;
14013 /* Return the offset size given in the compilation unit header for CU. */
14016 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14019 return per_cu
->cu
->header
.offset_size
;
14022 /* If the CU is not currently read in, we re-read its header. */
14023 struct objfile
*objfile
= per_cu
->objfile
;
14024 struct dwarf2_per_objfile
*per_objfile
14025 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14026 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14027 struct comp_unit_head cu_header
;
14029 memset (&cu_header
, 0, sizeof cu_header
);
14030 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14031 return cu_header
.offset_size
;
14035 /* Return the text offset of the CU. The returned offset comes from
14036 this CU's objfile. If this objfile came from a separate debuginfo
14037 file, then the offset may be different from the corresponding
14038 offset in the parent objfile. */
14041 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14043 struct objfile
*objfile
= per_cu
->objfile
;
14045 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14048 /* Locate the .debug_info compilation unit from CU's objfile which contains
14049 the DIE at OFFSET. Raises an error on failure. */
14051 static struct dwarf2_per_cu_data
*
14052 dwarf2_find_containing_comp_unit (unsigned int offset
,
14053 struct objfile
*objfile
)
14055 struct dwarf2_per_cu_data
*this_cu
;
14059 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14062 int mid
= low
+ (high
- low
) / 2;
14064 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14069 gdb_assert (low
== high
);
14070 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14073 error (_("Dwarf Error: could not find partial DIE containing "
14074 "offset 0x%lx [in module %s]"),
14075 (long) offset
, bfd_get_filename (objfile
->obfd
));
14077 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14078 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14082 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14083 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14084 && offset
>= this_cu
->offset
+ this_cu
->length
)
14085 error (_("invalid dwarf2 offset %u"), offset
);
14086 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14091 /* Locate the compilation unit from OBJFILE which is located at exactly
14092 OFFSET. Raises an error on failure. */
14094 static struct dwarf2_per_cu_data
*
14095 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14097 struct dwarf2_per_cu_data
*this_cu
;
14099 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14100 if (this_cu
->offset
!= offset
)
14101 error (_("no compilation unit with offset %u."), offset
);
14105 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14107 static struct dwarf2_cu
*
14108 alloc_one_comp_unit (struct objfile
*objfile
)
14110 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
14111 cu
->objfile
= objfile
;
14112 obstack_init (&cu
->comp_unit_obstack
);
14116 /* Release one cached compilation unit, CU. We unlink it from the tree
14117 of compilation units, but we don't remove it from the read_in_chain;
14118 the caller is responsible for that.
14119 NOTE: DATA is a void * because this function is also used as a
14120 cleanup routine. */
14123 free_one_comp_unit (void *data
)
14125 struct dwarf2_cu
*cu
= data
;
14127 if (cu
->per_cu
!= NULL
)
14128 cu
->per_cu
->cu
= NULL
;
14131 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14136 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14137 when we're finished with it. We can't free the pointer itself, but be
14138 sure to unlink it from the cache. Also release any associated storage
14139 and perform cache maintenance.
14141 Only used during partial symbol parsing. */
14144 free_stack_comp_unit (void *data
)
14146 struct dwarf2_cu
*cu
= data
;
14148 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14149 cu
->partial_dies
= NULL
;
14151 if (cu
->per_cu
!= NULL
)
14153 /* This compilation unit is on the stack in our caller, so we
14154 should not xfree it. Just unlink it. */
14155 cu
->per_cu
->cu
= NULL
;
14158 /* If we had a per-cu pointer, then we may have other compilation
14159 units loaded, so age them now. */
14160 age_cached_comp_units ();
14164 /* Free all cached compilation units. */
14167 free_cached_comp_units (void *data
)
14169 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14171 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14172 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14173 while (per_cu
!= NULL
)
14175 struct dwarf2_per_cu_data
*next_cu
;
14177 next_cu
= per_cu
->cu
->read_in_chain
;
14179 free_one_comp_unit (per_cu
->cu
);
14180 *last_chain
= next_cu
;
14186 /* Increase the age counter on each cached compilation unit, and free
14187 any that are too old. */
14190 age_cached_comp_units (void)
14192 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14194 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14195 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14196 while (per_cu
!= NULL
)
14198 per_cu
->cu
->last_used
++;
14199 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14200 dwarf2_mark (per_cu
->cu
);
14201 per_cu
= per_cu
->cu
->read_in_chain
;
14204 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14205 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14206 while (per_cu
!= NULL
)
14208 struct dwarf2_per_cu_data
*next_cu
;
14210 next_cu
= per_cu
->cu
->read_in_chain
;
14212 if (!per_cu
->cu
->mark
)
14214 free_one_comp_unit (per_cu
->cu
);
14215 *last_chain
= next_cu
;
14218 last_chain
= &per_cu
->cu
->read_in_chain
;
14224 /* Remove a single compilation unit from the cache. */
14227 free_one_cached_comp_unit (void *target_cu
)
14229 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14231 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14232 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14233 while (per_cu
!= NULL
)
14235 struct dwarf2_per_cu_data
*next_cu
;
14237 next_cu
= per_cu
->cu
->read_in_chain
;
14239 if (per_cu
->cu
== target_cu
)
14241 free_one_comp_unit (per_cu
->cu
);
14242 *last_chain
= next_cu
;
14246 last_chain
= &per_cu
->cu
->read_in_chain
;
14252 /* Release all extra memory associated with OBJFILE. */
14255 dwarf2_free_objfile (struct objfile
*objfile
)
14257 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14259 if (dwarf2_per_objfile
== NULL
)
14262 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14263 free_cached_comp_units (NULL
);
14265 if (dwarf2_per_objfile
->using_index
)
14269 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14272 struct dwarf2_per_cu_data
*per_cu
=
14273 dwarf2_per_objfile
->all_comp_units
[i
];
14275 if (!per_cu
->v
.quick
->lines
)
14278 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14280 if (per_cu
->v
.quick
->file_names
)
14281 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14282 if (per_cu
->v
.quick
->full_names
)
14283 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14286 free_line_header (per_cu
->v
.quick
->lines
);
14290 /* Everything else should be on the objfile obstack. */
14293 /* A pair of DIE offset and GDB type pointer. We store these
14294 in a hash table separate from the DIEs, and preserve them
14295 when the DIEs are flushed out of cache. */
14297 struct dwarf2_offset_and_type
14299 unsigned int offset
;
14303 /* Hash function for a dwarf2_offset_and_type. */
14306 offset_and_type_hash (const void *item
)
14308 const struct dwarf2_offset_and_type
*ofs
= item
;
14310 return ofs
->offset
;
14313 /* Equality function for a dwarf2_offset_and_type. */
14316 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14318 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14319 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14321 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14324 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14325 table if necessary. For convenience, return TYPE.
14327 The DIEs reading must have careful ordering to:
14328 * Not cause infite loops trying to read in DIEs as a prerequisite for
14329 reading current DIE.
14330 * Not trying to dereference contents of still incompletely read in types
14331 while reading in other DIEs.
14332 * Enable referencing still incompletely read in types just by a pointer to
14333 the type without accessing its fields.
14335 Therefore caller should follow these rules:
14336 * Try to fetch any prerequisite types we may need to build this DIE type
14337 before building the type and calling set_die_type.
14338 * After building type call set_die_type for current DIE as soon as
14339 possible before fetching more types to complete the current type.
14340 * Make the type as complete as possible before fetching more types. */
14342 static struct type
*
14343 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14345 struct dwarf2_offset_and_type
**slot
, ofs
;
14346 struct objfile
*objfile
= cu
->objfile
;
14347 htab_t
*type_hash_ptr
;
14349 /* For Ada types, make sure that the gnat-specific data is always
14350 initialized (if not already set). There are a few types where
14351 we should not be doing so, because the type-specific area is
14352 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14353 where the type-specific area is used to store the floatformat).
14354 But this is not a problem, because the gnat-specific information
14355 is actually not needed for these types. */
14356 if (need_gnat_info (cu
)
14357 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14358 && TYPE_CODE (type
) != TYPE_CODE_FLT
14359 && !HAVE_GNAT_AUX_INFO (type
))
14360 INIT_GNAT_SPECIFIC (type
);
14362 if (cu
->per_cu
->from_debug_types
)
14363 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14365 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14367 if (*type_hash_ptr
== NULL
)
14370 = htab_create_alloc_ex (127,
14371 offset_and_type_hash
,
14372 offset_and_type_eq
,
14374 &objfile
->objfile_obstack
,
14375 hashtab_obstack_allocate
,
14376 dummy_obstack_deallocate
);
14379 ofs
.offset
= die
->offset
;
14381 slot
= (struct dwarf2_offset_and_type
**)
14382 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14384 complaint (&symfile_complaints
,
14385 _("A problem internal to GDB: DIE 0x%x has type already set"),
14387 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14392 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14393 table, or return NULL if the die does not have a saved type. */
14395 static struct type
*
14396 get_die_type_at_offset (unsigned int offset
,
14397 struct dwarf2_per_cu_data
*per_cu
)
14399 struct dwarf2_offset_and_type
*slot
, ofs
;
14402 if (per_cu
->from_debug_types
)
14403 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14405 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14406 if (type_hash
== NULL
)
14409 ofs
.offset
= offset
;
14410 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14417 /* Look up the type for DIE in the appropriate type_hash table,
14418 or return NULL if DIE does not have a saved type. */
14420 static struct type
*
14421 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14423 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14426 /* Add a dependence relationship from CU to REF_PER_CU. */
14429 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14430 struct dwarf2_per_cu_data
*ref_per_cu
)
14434 if (cu
->dependencies
== NULL
)
14436 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14437 NULL
, &cu
->comp_unit_obstack
,
14438 hashtab_obstack_allocate
,
14439 dummy_obstack_deallocate
);
14441 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14443 *slot
= ref_per_cu
;
14446 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14447 Set the mark field in every compilation unit in the
14448 cache that we must keep because we are keeping CU. */
14451 dwarf2_mark_helper (void **slot
, void *data
)
14453 struct dwarf2_per_cu_data
*per_cu
;
14455 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14456 if (per_cu
->cu
->mark
)
14458 per_cu
->cu
->mark
= 1;
14460 if (per_cu
->cu
->dependencies
!= NULL
)
14461 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14466 /* Set the mark field in CU and in every other compilation unit in the
14467 cache that we must keep because we are keeping CU. */
14470 dwarf2_mark (struct dwarf2_cu
*cu
)
14475 if (cu
->dependencies
!= NULL
)
14476 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14480 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14484 per_cu
->cu
->mark
= 0;
14485 per_cu
= per_cu
->cu
->read_in_chain
;
14489 /* Trivial hash function for partial_die_info: the hash value of a DIE
14490 is its offset in .debug_info for this objfile. */
14493 partial_die_hash (const void *item
)
14495 const struct partial_die_info
*part_die
= item
;
14497 return part_die
->offset
;
14500 /* Trivial comparison function for partial_die_info structures: two DIEs
14501 are equal if they have the same offset. */
14504 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14506 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14507 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14509 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14512 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14513 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14516 set_dwarf2_cmd (char *args
, int from_tty
)
14518 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14522 show_dwarf2_cmd (char *args
, int from_tty
)
14524 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14527 /* If section described by INFO was mmapped, munmap it now. */
14530 munmap_section_buffer (struct dwarf2_section_info
*info
)
14532 if (info
->was_mmapped
)
14535 intptr_t begin
= (intptr_t) info
->buffer
;
14536 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14537 size_t map_length
= info
->size
+ begin
- map_begin
;
14539 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14541 /* Without HAVE_MMAP, we should never be here to begin with. */
14542 gdb_assert_not_reached ("no mmap support");
14547 /* munmap debug sections for OBJFILE, if necessary. */
14550 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14552 struct dwarf2_per_objfile
*data
= d
;
14554 /* This is sorted according to the order they're defined in to make it easier
14555 to keep in sync. */
14556 munmap_section_buffer (&data
->info
);
14557 munmap_section_buffer (&data
->abbrev
);
14558 munmap_section_buffer (&data
->line
);
14559 munmap_section_buffer (&data
->loc
);
14560 munmap_section_buffer (&data
->macinfo
);
14561 munmap_section_buffer (&data
->str
);
14562 munmap_section_buffer (&data
->ranges
);
14563 munmap_section_buffer (&data
->types
);
14564 munmap_section_buffer (&data
->frame
);
14565 munmap_section_buffer (&data
->eh_frame
);
14566 munmap_section_buffer (&data
->gdb_index
);
14571 /* The contents of the hash table we create when building the string
14573 struct strtab_entry
14575 offset_type offset
;
14579 /* Hash function for a strtab_entry. */
14581 hash_strtab_entry (const void *e
)
14583 const struct strtab_entry
*entry
= e
;
14584 return mapped_index_string_hash (entry
->str
);
14587 /* Equality function for a strtab_entry. */
14589 eq_strtab_entry (const void *a
, const void *b
)
14591 const struct strtab_entry
*ea
= a
;
14592 const struct strtab_entry
*eb
= b
;
14593 return !strcmp (ea
->str
, eb
->str
);
14596 /* Create a strtab_entry hash table. */
14598 create_strtab (void)
14600 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14601 xfree
, xcalloc
, xfree
);
14604 /* Add a string to the constant pool. Return the string's offset in
14607 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14610 struct strtab_entry entry
;
14611 struct strtab_entry
*result
;
14614 slot
= htab_find_slot (table
, &entry
, INSERT
);
14619 result
= XNEW (struct strtab_entry
);
14620 result
->offset
= obstack_object_size (cpool
);
14622 obstack_grow_str0 (cpool
, str
);
14625 return result
->offset
;
14628 /* An entry in the symbol table. */
14629 struct symtab_index_entry
14631 /* The name of the symbol. */
14633 /* The offset of the name in the constant pool. */
14634 offset_type index_offset
;
14635 /* A sorted vector of the indices of all the CUs that hold an object
14637 VEC (offset_type
) *cu_indices
;
14640 /* The symbol table. This is a power-of-2-sized hash table. */
14641 struct mapped_symtab
14643 offset_type n_elements
;
14645 struct symtab_index_entry
**data
;
14648 /* Hash function for a symtab_index_entry. */
14650 hash_symtab_entry (const void *e
)
14652 const struct symtab_index_entry
*entry
= e
;
14653 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14654 sizeof (offset_type
) * VEC_length (offset_type
,
14655 entry
->cu_indices
),
14659 /* Equality function for a symtab_index_entry. */
14661 eq_symtab_entry (const void *a
, const void *b
)
14663 const struct symtab_index_entry
*ea
= a
;
14664 const struct symtab_index_entry
*eb
= b
;
14665 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14666 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14668 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14669 VEC_address (offset_type
, eb
->cu_indices
),
14670 sizeof (offset_type
) * len
);
14673 /* Destroy a symtab_index_entry. */
14675 delete_symtab_entry (void *p
)
14677 struct symtab_index_entry
*entry
= p
;
14678 VEC_free (offset_type
, entry
->cu_indices
);
14682 /* Create a hash table holding symtab_index_entry objects. */
14684 create_index_table (void)
14686 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14687 delete_symtab_entry
, xcalloc
, xfree
);
14690 /* Create a new mapped symtab object. */
14691 static struct mapped_symtab
*
14692 create_mapped_symtab (void)
14694 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14695 symtab
->n_elements
= 0;
14696 symtab
->size
= 1024;
14697 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14701 /* Destroy a mapped_symtab. */
14703 cleanup_mapped_symtab (void *p
)
14705 struct mapped_symtab
*symtab
= p
;
14706 /* The contents of the array are freed when the other hash table is
14708 xfree (symtab
->data
);
14712 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14714 static struct symtab_index_entry
**
14715 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14717 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14719 index
= hash
& (symtab
->size
- 1);
14720 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14724 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14725 return &symtab
->data
[index
];
14726 index
= (index
+ step
) & (symtab
->size
- 1);
14730 /* Expand SYMTAB's hash table. */
14732 hash_expand (struct mapped_symtab
*symtab
)
14734 offset_type old_size
= symtab
->size
;
14736 struct symtab_index_entry
**old_entries
= symtab
->data
;
14739 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14741 for (i
= 0; i
< old_size
; ++i
)
14743 if (old_entries
[i
])
14745 struct symtab_index_entry
**slot
= find_slot (symtab
,
14746 old_entries
[i
]->name
);
14747 *slot
= old_entries
[i
];
14751 xfree (old_entries
);
14754 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14755 is the index of the CU in which the symbol appears. */
14757 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
14758 offset_type cu_index
)
14760 struct symtab_index_entry
**slot
;
14762 ++symtab
->n_elements
;
14763 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
14764 hash_expand (symtab
);
14766 slot
= find_slot (symtab
, name
);
14769 *slot
= XNEW (struct symtab_index_entry
);
14770 (*slot
)->name
= name
;
14771 (*slot
)->cu_indices
= NULL
;
14773 /* Don't push an index twice. Due to how we add entries we only
14774 have to check the last one. */
14775 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
14776 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
14777 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
14780 /* Add a vector of indices to the constant pool. */
14782 add_indices_to_cpool (htab_t index_table
, struct obstack
*cpool
,
14783 struct symtab_index_entry
*entry
)
14787 slot
= htab_find_slot (index_table
, entry
, INSERT
);
14790 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
14791 offset_type val
= MAYBE_SWAP (len
);
14796 entry
->index_offset
= obstack_object_size (cpool
);
14798 obstack_grow (cpool
, &val
, sizeof (val
));
14800 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
14803 val
= MAYBE_SWAP (iter
);
14804 obstack_grow (cpool
, &val
, sizeof (val
));
14809 struct symtab_index_entry
*old_entry
= *slot
;
14810 entry
->index_offset
= old_entry
->index_offset
;
14813 return entry
->index_offset
;
14816 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14817 constant pool entries going into the obstack CPOOL. */
14819 write_hash_table (struct mapped_symtab
*symtab
,
14820 struct obstack
*output
, struct obstack
*cpool
)
14823 htab_t index_table
;
14826 index_table
= create_index_table ();
14827 str_table
= create_strtab ();
14828 /* We add all the index vectors to the constant pool first, to
14829 ensure alignment is ok. */
14830 for (i
= 0; i
< symtab
->size
; ++i
)
14832 if (symtab
->data
[i
])
14833 add_indices_to_cpool (index_table
, cpool
, symtab
->data
[i
]);
14836 /* Now write out the hash table. */
14837 for (i
= 0; i
< symtab
->size
; ++i
)
14839 offset_type str_off
, vec_off
;
14841 if (symtab
->data
[i
])
14843 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
14844 vec_off
= symtab
->data
[i
]->index_offset
;
14848 /* While 0 is a valid constant pool index, it is not valid
14849 to have 0 for both offsets. */
14854 str_off
= MAYBE_SWAP (str_off
);
14855 vec_off
= MAYBE_SWAP (vec_off
);
14857 obstack_grow (output
, &str_off
, sizeof (str_off
));
14858 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
14861 htab_delete (str_table
);
14862 htab_delete (index_table
);
14865 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14866 from PST; CU_INDEX is the index of the CU in the vector of all
14869 add_address_entry (struct objfile
*objfile
,
14870 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
14871 unsigned int cu_index
)
14873 offset_type offset
;
14875 CORE_ADDR baseaddr
;
14877 /* Don't bother recording empty ranges. */
14878 if (pst
->textlow
== pst
->texthigh
)
14881 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14883 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
14884 obstack_grow (addr_obstack
, addr
, 8);
14885 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
14886 obstack_grow (addr_obstack
, addr
, 8);
14887 offset
= MAYBE_SWAP (cu_index
);
14888 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
14891 /* Add a list of partial symbols to SYMTAB. */
14893 write_psymbols (struct mapped_symtab
*symtab
,
14894 struct partial_symbol
**psymp
,
14896 offset_type cu_index
)
14898 for (; count
-- > 0; ++psymp
)
14900 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
14901 error (_("Ada is not currently supported by the index"));
14902 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
14906 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14907 exception if there is an error. */
14909 write_obstack (FILE *file
, struct obstack
*obstack
)
14911 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
14913 != obstack_object_size (obstack
))
14914 error (_("couldn't data write to file"));
14917 /* Unlink a file if the argument is not NULL. */
14919 unlink_if_set (void *p
)
14921 char **filename
= p
;
14923 unlink (*filename
);
14926 /* A helper struct used when iterating over debug_types. */
14927 struct signatured_type_index_data
14929 struct objfile
*objfile
;
14930 struct mapped_symtab
*symtab
;
14931 struct obstack
*types_list
;
14935 /* A helper function that writes a single signatured_type to an
14938 write_one_signatured_type (void **slot
, void *d
)
14940 struct signatured_type_index_data
*info
= d
;
14941 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
14942 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
14943 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
14946 write_psymbols (info
->symtab
,
14947 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
14948 psymtab
->n_global_syms
, info
->cu_index
);
14949 write_psymbols (info
->symtab
,
14950 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
14951 psymtab
->n_static_syms
, info
->cu_index
);
14953 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
14954 obstack_grow (info
->types_list
, val
, 8);
14955 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
14956 obstack_grow (info
->types_list
, val
, 8);
14957 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
14958 obstack_grow (info
->types_list
, val
, 8);
14965 /* Create an index file for OBJFILE in the directory DIR. */
14967 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
14969 struct cleanup
*cleanup
;
14970 char *filename
, *cleanup_filename
;
14971 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
14972 struct obstack cu_list
, types_cu_list
;
14975 struct mapped_symtab
*symtab
;
14976 offset_type val
, size_of_contents
, total_len
;
14980 if (!objfile
->psymtabs
)
14982 if (dwarf2_per_objfile
->using_index
)
14983 error (_("Cannot use an index to create the index"));
14985 if (stat (objfile
->name
, &st
) < 0)
14986 perror_with_name (_("Could not stat"));
14988 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
14989 INDEX_SUFFIX
, (char *) NULL
);
14990 cleanup
= make_cleanup (xfree
, filename
);
14992 out_file
= fopen (filename
, "wb");
14994 error (_("Can't open `%s' for writing"), filename
);
14996 cleanup_filename
= filename
;
14997 make_cleanup (unlink_if_set
, &cleanup_filename
);
14999 symtab
= create_mapped_symtab ();
15000 make_cleanup (cleanup_mapped_symtab
, symtab
);
15002 obstack_init (&addr_obstack
);
15003 make_cleanup_obstack_free (&addr_obstack
);
15005 obstack_init (&cu_list
);
15006 make_cleanup_obstack_free (&cu_list
);
15008 obstack_init (&types_cu_list
);
15009 make_cleanup_obstack_free (&types_cu_list
);
15011 /* The list is already sorted, so we don't need to do additional
15012 work here. Also, the debug_types entries do not appear in
15013 all_comp_units, but only in their own hash table. */
15014 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15016 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15017 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15020 write_psymbols (symtab
,
15021 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15022 psymtab
->n_global_syms
, i
);
15023 write_psymbols (symtab
,
15024 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15025 psymtab
->n_static_syms
, i
);
15027 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15029 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15030 obstack_grow (&cu_list
, val
, 8);
15031 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15032 obstack_grow (&cu_list
, val
, 8);
15035 /* Write out the .debug_type entries, if any. */
15036 if (dwarf2_per_objfile
->signatured_types
)
15038 struct signatured_type_index_data sig_data
;
15040 sig_data
.objfile
= objfile
;
15041 sig_data
.symtab
= symtab
;
15042 sig_data
.types_list
= &types_cu_list
;
15043 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15044 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15045 write_one_signatured_type
, &sig_data
);
15048 obstack_init (&constant_pool
);
15049 make_cleanup_obstack_free (&constant_pool
);
15050 obstack_init (&symtab_obstack
);
15051 make_cleanup_obstack_free (&symtab_obstack
);
15052 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15054 obstack_init (&contents
);
15055 make_cleanup_obstack_free (&contents
);
15056 size_of_contents
= 6 * sizeof (offset_type
);
15057 total_len
= size_of_contents
;
15059 /* The version number. */
15060 val
= MAYBE_SWAP (2);
15061 obstack_grow (&contents
, &val
, sizeof (val
));
15063 /* The offset of the CU list from the start of the file. */
15064 val
= MAYBE_SWAP (total_len
);
15065 obstack_grow (&contents
, &val
, sizeof (val
));
15066 total_len
+= obstack_object_size (&cu_list
);
15068 /* The offset of the types CU list from the start of the file. */
15069 val
= MAYBE_SWAP (total_len
);
15070 obstack_grow (&contents
, &val
, sizeof (val
));
15071 total_len
+= obstack_object_size (&types_cu_list
);
15073 /* The offset of the address table from the start of the file. */
15074 val
= MAYBE_SWAP (total_len
);
15075 obstack_grow (&contents
, &val
, sizeof (val
));
15076 total_len
+= obstack_object_size (&addr_obstack
);
15078 /* The offset of the symbol table 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 (&symtab_obstack
);
15083 /* The offset of the constant pool 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 (&constant_pool
);
15088 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15090 write_obstack (out_file
, &contents
);
15091 write_obstack (out_file
, &cu_list
);
15092 write_obstack (out_file
, &types_cu_list
);
15093 write_obstack (out_file
, &addr_obstack
);
15094 write_obstack (out_file
, &symtab_obstack
);
15095 write_obstack (out_file
, &constant_pool
);
15099 /* We want to keep the file, so we set cleanup_filename to NULL
15100 here. See unlink_if_set. */
15101 cleanup_filename
= NULL
;
15103 do_cleanups (cleanup
);
15106 /* The mapped index file format is designed to be directly mmap()able
15107 on any architecture. In most cases, a datum is represented using a
15108 little-endian 32-bit integer value, called an offset_type. Big
15109 endian machines must byte-swap the values before using them.
15110 Exceptions to this rule are noted. The data is laid out such that
15111 alignment is always respected.
15113 A mapped index consists of several sections.
15115 1. The file header. This is a sequence of values, of offset_type
15116 unless otherwise noted:
15117 [0] The version number. Currently 1 or 2. The differences are
15118 noted below. Version 1 did not account for .debug_types sections;
15119 the presence of a .debug_types section invalidates any version 1
15120 index that may exist.
15121 [1] The offset, from the start of the file, of the CU list.
15122 [1.5] In version 2, the offset, from the start of the file, of the
15123 types CU list. This offset does not appear in version 1. Note
15124 that this can be empty, in which case this offset will be equal to
15126 [2] The offset, from the start of the file, of the address section.
15127 [3] The offset, from the start of the file, of the symbol table.
15128 [4] The offset, from the start of the file, of the constant pool.
15130 2. The CU list. This is a sequence of pairs of 64-bit
15131 little-endian values, sorted by the CU offset. The first element
15132 in each pair is the offset of a CU in the .debug_info section. The
15133 second element in each pair is the length of that CU. References
15134 to a CU elsewhere in the map are done using a CU index, which is
15135 just the 0-based index into this table. Note that if there are
15136 type CUs, then conceptually CUs and type CUs form a single list for
15137 the purposes of CU indices.
15139 2.5 The types CU list. This does not appear in a version 1 index.
15140 This is a sequence of triplets of 64-bit little-endian values. In
15141 a triplet, the first value is the CU offset, the second value is
15142 the type offset in the CU, and the third value is the type
15143 signature. The types CU list is not sorted.
15145 3. The address section. The address section consists of a sequence
15146 of address entries. Each address entry has three elements.
15147 [0] The low address. This is a 64-bit little-endian value.
15148 [1] The high address. This is a 64-bit little-endian value.
15149 [2] The CU index. This is an offset_type value.
15151 4. The symbol table. This is a hash table. The size of the hash
15152 table is always a power of 2. The initial hash and the step are
15153 currently defined by the `find_slot' function.
15155 Each slot in the hash table consists of a pair of offset_type
15156 values. The first value is the offset of the symbol's name in the
15157 constant pool. The second value is the offset of the CU vector in
15160 If both values are 0, then this slot in the hash table is empty.
15161 This is ok because while 0 is a valid constant pool index, it
15162 cannot be a valid index for both a string and a CU vector.
15164 A string in the constant pool is stored as a \0-terminated string,
15167 A CU vector in the constant pool is a sequence of offset_type
15168 values. The first value is the number of CU indices in the vector.
15169 Each subsequent value is the index of a CU in the CU list. This
15170 element in the hash table is used to indicate which CUs define the
15173 5. The constant pool. This is simply a bunch of bytes. It is
15174 organized so that alignment is correct: CU vectors are stored
15175 first, followed by strings. */
15177 save_gdb_index_command (char *arg
, int from_tty
)
15179 struct objfile
*objfile
;
15182 error (_("usage: save gdb-index DIRECTORY"));
15184 ALL_OBJFILES (objfile
)
15188 /* If the objfile does not correspond to an actual file, skip it. */
15189 if (stat (objfile
->name
, &st
) < 0)
15192 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15193 if (dwarf2_per_objfile
)
15195 volatile struct gdb_exception except
;
15197 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15199 write_psymtabs_to_index (objfile
, arg
);
15201 if (except
.reason
< 0)
15202 exception_fprintf (gdb_stderr
, except
,
15203 _("Error while writing index for `%s': "),
15211 int dwarf2_always_disassemble
;
15214 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15215 struct cmd_list_element
*c
, const char *value
)
15217 fprintf_filtered (file
, _("\
15218 Whether to always disassemble DWARF expressions is %s.\n"),
15222 void _initialize_dwarf2_read (void);
15225 _initialize_dwarf2_read (void)
15227 struct cmd_list_element
*c
;
15229 dwarf2_objfile_data_key
15230 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15232 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15233 Set DWARF 2 specific variables.\n\
15234 Configure DWARF 2 variables such as the cache size"),
15235 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15236 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15238 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15239 Show DWARF 2 specific variables\n\
15240 Show DWARF 2 variables such as the cache size"),
15241 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15242 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15244 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15245 &dwarf2_max_cache_age
, _("\
15246 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15247 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15248 A higher limit means that cached compilation units will be stored\n\
15249 in memory longer, and more total memory will be used. Zero disables\n\
15250 caching, which can slow down startup."),
15252 show_dwarf2_max_cache_age
,
15253 &set_dwarf2_cmdlist
,
15254 &show_dwarf2_cmdlist
);
15256 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15257 &dwarf2_always_disassemble
, _("\
15258 Set whether `info address' always disassembles DWARF expressions."), _("\
15259 Show whether `info address' always disassembles DWARF expressions."), _("\
15260 When enabled, DWARF expressions are always printed in an assembly-like\n\
15261 syntax. When disabled, expressions will be printed in a more\n\
15262 conversational style, when possible."),
15264 show_dwarf2_always_disassemble
,
15265 &set_dwarf2_cmdlist
,
15266 &show_dwarf2_cmdlist
);
15268 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15269 Set debugging of the dwarf2 DIE reader."), _("\
15270 Show debugging of the dwarf2 DIE reader."), _("\
15271 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15272 The value is the maximum depth to print."),
15275 &setdebuglist
, &showdebuglist
);
15277 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15278 _("Save a .gdb-index file"),
15280 set_cmd_completer (c
, filename_completer
);