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"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
62 #define MAP_FAILED ((void *) -1)
67 /* .debug_info header for a compilation unit
68 Because of alignment constraints, this structure has padding and cannot
69 be mapped directly onto the beginning of the .debug_info section. */
70 typedef struct comp_unit_header
72 unsigned int length
; /* length of the .debug_info
74 unsigned short version
; /* version number -- 2 for DWARF
76 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
77 unsigned char addr_size
; /* byte size of an address -- 4 */
80 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
83 /* .debug_pubnames header
84 Because of alignment constraints, this structure has padding and cannot
85 be mapped directly onto the beginning of the .debug_info section. */
86 typedef struct pubnames_header
88 unsigned int length
; /* length of the .debug_pubnames
90 unsigned char version
; /* version number -- 2 for DWARF
92 unsigned int info_offset
; /* offset into .debug_info section */
93 unsigned int info_size
; /* byte size of .debug_info section
97 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
99 /* .debug_pubnames header
100 Because of alignment constraints, this structure has padding and cannot
101 be mapped directly onto the beginning of the .debug_info section. */
102 typedef struct aranges_header
104 unsigned int length
; /* byte len of the .debug_aranges
106 unsigned short version
; /* version number -- 2 for DWARF
108 unsigned int info_offset
; /* offset into .debug_info section */
109 unsigned char addr_size
; /* byte size of an address */
110 unsigned char seg_size
; /* byte size of segment descriptor */
113 #define _ACTUAL_ARANGES_HEADER_SIZE 12
115 /* .debug_line statement program prologue
116 Because of alignment constraints, this structure has padding and cannot
117 be mapped directly onto the beginning of the .debug_info section. */
118 typedef struct statement_prologue
120 unsigned int total_length
; /* byte length of the statement
122 unsigned short version
; /* version number -- 2 for DWARF
124 unsigned int prologue_length
; /* # bytes between prologue &
126 unsigned char minimum_instruction_length
; /* byte size of
128 unsigned char default_is_stmt
; /* initial value of is_stmt
131 unsigned char line_range
;
132 unsigned char opcode_base
; /* number assigned to first special
134 unsigned char *standard_opcode_lengths
;
138 /* When non-zero, dump DIEs after they are read in. */
139 static int dwarf2_die_debug
= 0;
143 /* When set, the file that we're processing is known to have debugging
144 info for C++ namespaces. GCC 3.3.x did not produce this information,
145 but later versions do. */
147 static int processing_has_namespace_info
;
149 static const struct objfile_data
*dwarf2_objfile_data_key
;
151 struct dwarf2_section_info
159 struct dwarf2_per_objfile
161 struct dwarf2_section_info info
;
162 struct dwarf2_section_info abbrev
;
163 struct dwarf2_section_info line
;
164 struct dwarf2_section_info pubnames
;
165 struct dwarf2_section_info aranges
;
166 struct dwarf2_section_info loc
;
167 struct dwarf2_section_info macinfo
;
168 struct dwarf2_section_info str
;
169 struct dwarf2_section_info ranges
;
170 struct dwarf2_section_info types
;
171 struct dwarf2_section_info frame
;
172 struct dwarf2_section_info eh_frame
;
174 /* A list of all the compilation units. This is used to locate
175 the target compilation unit of a particular reference. */
176 struct dwarf2_per_cu_data
**all_comp_units
;
178 /* The number of compilation units in ALL_COMP_UNITS. */
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data
*read_in_chain
;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types
;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero
;
194 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
196 /* names of the debugging sections */
198 /* Note that if the debugging section has been compressed, it might
199 have a name like .zdebug_info. */
201 #define INFO_SECTION "debug_info"
202 #define ABBREV_SECTION "debug_abbrev"
203 #define LINE_SECTION "debug_line"
204 #define PUBNAMES_SECTION "debug_pubnames"
205 #define ARANGES_SECTION "debug_aranges"
206 #define LOC_SECTION "debug_loc"
207 #define MACINFO_SECTION "debug_macinfo"
208 #define STR_SECTION "debug_str"
209 #define RANGES_SECTION "debug_ranges"
210 #define TYPES_SECTION "debug_types"
211 #define FRAME_SECTION "debug_frame"
212 #define EH_FRAME_SECTION "eh_frame"
214 /* local data types */
216 /* We hold several abbreviation tables in memory at the same time. */
217 #ifndef ABBREV_HASH_SIZE
218 #define ABBREV_HASH_SIZE 121
221 /* The data in a compilation unit header, after target2host
222 translation, looks like this. */
223 struct comp_unit_head
227 unsigned char addr_size
;
228 unsigned char signed_addr_p
;
229 unsigned int abbrev_offset
;
231 /* Size of file offsets; either 4 or 8. */
232 unsigned int offset_size
;
234 /* Size of the length field; either 4 or 12. */
235 unsigned int initial_length_size
;
237 /* Offset to the first byte of this compilation unit header in the
238 .debug_info section, for resolving relative reference dies. */
241 /* Offset to first die in this cu from the start of the cu.
242 This will be the first byte following the compilation unit header. */
243 unsigned int first_die_offset
;
246 /* Internal state when decoding a particular compilation unit. */
249 /* The objfile containing this compilation unit. */
250 struct objfile
*objfile
;
252 /* The header of the compilation unit. */
253 struct comp_unit_head header
;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address
;
258 /* Non-zero if base_address has been set. */
261 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
263 /* The language we are debugging. */
264 enum language language
;
265 const struct language_defn
*language_defn
;
267 const char *producer
;
269 /* The generic symbol table building routines have separate lists for
270 file scope symbols and all all other scopes (local scopes). So
271 we need to select the right one to pass to add_symbol_to_list().
272 We do it by keeping a pointer to the correct list in list_in_scope.
274 FIXME: The original dwarf code just treated the file scope as the
275 first local scope, and all other local scopes as nested local
276 scopes, and worked fine. Check to see if we really need to
277 distinguish these in buildsym.c. */
278 struct pending
**list_in_scope
;
280 /* DWARF abbreviation table associated with this compilation unit. */
281 struct abbrev_info
**dwarf2_abbrevs
;
283 /* Storage for the abbrev table. */
284 struct obstack abbrev_obstack
;
286 /* Hash table holding all the loaded partial DIEs. */
289 /* Storage for things with the same lifetime as this read-in compilation
290 unit, including partial DIEs. */
291 struct obstack comp_unit_obstack
;
293 /* When multiple dwarf2_cu structures are living in memory, this field
294 chains them all together, so that they can be released efficiently.
295 We will probably also want a generation counter so that most-recently-used
296 compilation units are cached... */
297 struct dwarf2_per_cu_data
*read_in_chain
;
299 /* Backchain to our per_cu entry if the tree has been built. */
300 struct dwarf2_per_cu_data
*per_cu
;
302 /* Pointer to the die -> type map. Although it is stored
303 permanently in per_cu, we copy it here to avoid double
307 /* How many compilation units ago was this CU last referenced? */
310 /* A hash table of die offsets for following references. */
313 /* Full DIEs if read in. */
314 struct die_info
*dies
;
316 /* A set of pointers to dwarf2_per_cu_data objects for compilation
317 units referenced by this one. Only set during full symbol processing;
318 partial symbol tables do not have dependencies. */
321 /* Header data from the line table, during full symbol processing. */
322 struct line_header
*line_header
;
324 /* Mark used when releasing cached dies. */
325 unsigned int mark
: 1;
327 /* This flag will be set if this compilation unit might include
328 inter-compilation-unit references. */
329 unsigned int has_form_ref_addr
: 1;
331 /* This flag will be set if this compilation unit includes any
332 DW_TAG_namespace DIEs. If we know that there are explicit
333 DIEs for namespaces, we don't need to try to infer them
334 from mangled names. */
335 unsigned int has_namespace_info
: 1;
338 /* Persistent data held for a compilation unit, even when not
339 processing it. We put a pointer to this structure in the
340 read_symtab_private field of the psymtab. If we encounter
341 inter-compilation-unit references, we also maintain a sorted
342 list of all compilation units. */
344 struct dwarf2_per_cu_data
346 /* The start offset and length of this compilation unit. 2**29-1
347 bytes should suffice to store the length of any compilation unit
348 - if it doesn't, GDB will fall over anyway.
349 NOTE: Unlike comp_unit_head.length, this length includes
350 initial_length_size. */
352 unsigned int length
: 29;
354 /* Flag indicating this compilation unit will be read in before
355 any of the current compilation units are processed. */
356 unsigned int queued
: 1;
358 /* This flag will be set if we need to load absolutely all DIEs
359 for this compilation unit, instead of just the ones we think
360 are interesting. It gets set if we look for a DIE in the
361 hash table and don't find it. */
362 unsigned int load_all_dies
: 1;
364 /* Non-zero if this CU is from .debug_types.
365 Otherwise it's from .debug_info. */
366 unsigned int from_debug_types
: 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu
*cu
;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab
*psymtab
;
383 /* Entry in the signatured_types hash table. */
385 struct signatured_type
389 /* Offset in .debug_types of the TU (type_unit) for this type. */
392 /* Offset in .debug_types of the type defined by this TU. */
393 unsigned int type_offset
;
395 /* The CU(/TU) of this type. */
396 struct dwarf2_per_cu_data per_cu
;
399 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
400 which are used for both .debug_info and .debug_types dies.
401 All parameters here are unchanging for the life of the call.
402 This struct exists to abstract away the constant parameters of
405 struct die_reader_specs
407 /* The bfd of this objfile. */
410 /* The CU of the DIE we are parsing. */
411 struct dwarf2_cu
*cu
;
413 /* Pointer to start of section buffer.
414 This is either the start of .debug_info or .debug_types. */
415 const gdb_byte
*buffer
;
418 /* The line number information for a compilation unit (found in the
419 .debug_line section) begins with a "statement program header",
420 which contains the following information. */
423 unsigned int total_length
;
424 unsigned short version
;
425 unsigned int header_length
;
426 unsigned char minimum_instruction_length
;
427 unsigned char default_is_stmt
;
429 unsigned char line_range
;
430 unsigned char opcode_base
;
432 /* standard_opcode_lengths[i] is the number of operands for the
433 standard opcode whose value is i. This means that
434 standard_opcode_lengths[0] is unused, and the last meaningful
435 element is standard_opcode_lengths[opcode_base - 1]. */
436 unsigned char *standard_opcode_lengths
;
438 /* The include_directories table. NOTE! These strings are not
439 allocated with xmalloc; instead, they are pointers into
440 debug_line_buffer. If you try to free them, `free' will get
442 unsigned int num_include_dirs
, include_dirs_size
;
445 /* The file_names table. NOTE! These strings are not allocated
446 with xmalloc; instead, they are pointers into debug_line_buffer.
447 Don't try to free them directly. */
448 unsigned int num_file_names
, file_names_size
;
452 unsigned int dir_index
;
453 unsigned int mod_time
;
455 int included_p
; /* Non-zero if referenced by the Line Number Program. */
456 struct symtab
*symtab
; /* The associated symbol table, if any. */
459 /* The start and end of the statement program following this
460 header. These point into dwarf2_per_objfile->line_buffer. */
461 gdb_byte
*statement_program_start
, *statement_program_end
;
464 /* When we construct a partial symbol table entry we only
465 need this much information. */
466 struct partial_die_info
468 /* Offset of this DIE. */
471 /* DWARF-2 tag for this DIE. */
472 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
474 /* Assorted flags describing the data found in this DIE. */
475 unsigned int has_children
: 1;
476 unsigned int is_external
: 1;
477 unsigned int is_declaration
: 1;
478 unsigned int has_type
: 1;
479 unsigned int has_specification
: 1;
480 unsigned int has_pc_info
: 1;
482 /* Flag set if the SCOPE field of this structure has been
484 unsigned int scope_set
: 1;
486 /* Flag set if the DIE has a byte_size attribute. */
487 unsigned int has_byte_size
: 1;
489 /* The name of this DIE. Normally the value of DW_AT_name, but
490 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
494 /* The scope to prepend to our children. This is generally
495 allocated on the comp_unit_obstack, so will disappear
496 when this compilation unit leaves the cache. */
499 /* The location description associated with this DIE, if any. */
500 struct dwarf_block
*locdesc
;
502 /* If HAS_PC_INFO, the PC range associated with this DIE. */
506 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
507 DW_AT_sibling, if any. */
510 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
511 DW_AT_specification (or DW_AT_abstract_origin or
513 unsigned int spec_offset
;
515 /* Pointers to this DIE's parent, first child, and next sibling,
517 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
520 /* This data structure holds the information of an abbrev. */
523 unsigned int number
; /* number identifying abbrev */
524 enum dwarf_tag tag
; /* dwarf tag */
525 unsigned short has_children
; /* boolean */
526 unsigned short num_attrs
; /* number of attributes */
527 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
528 struct abbrev_info
*next
; /* next in chain */
533 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
534 ENUM_BITFIELD(dwarf_form
) form
: 16;
537 /* Attributes have a name and a value */
540 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
541 ENUM_BITFIELD(dwarf_form
) form
: 15;
543 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
544 field should be in u.str (existing only for DW_STRING) but it is kept
545 here for better struct attribute alignment. */
546 unsigned int string_is_canonical
: 1;
551 struct dwarf_block
*blk
;
555 struct signatured_type
*signatured_type
;
560 /* This data structure holds a complete die structure. */
563 /* DWARF-2 tag for this DIE. */
564 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
566 /* Number of attributes */
567 unsigned short num_attrs
;
572 /* Offset in .debug_info or .debug_types section. */
575 /* The dies in a compilation unit form an n-ary tree. PARENT
576 points to this die's parent; CHILD points to the first child of
577 this node; and all the children of a given node are chained
578 together via their SIBLING fields, terminated by a die whose
580 struct die_info
*child
; /* Its first child, if any. */
581 struct die_info
*sibling
; /* Its next sibling, if any. */
582 struct die_info
*parent
; /* Its parent, if any. */
584 /* An array of attributes, with NUM_ATTRS elements. There may be
585 zero, but it's not common and zero-sized arrays are not
586 sufficiently portable C. */
587 struct attribute attrs
[1];
590 struct function_range
593 CORE_ADDR lowpc
, highpc
;
595 struct function_range
*next
;
598 /* Get at parts of an attribute structure */
600 #define DW_STRING(attr) ((attr)->u.str)
601 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
602 #define DW_UNSND(attr) ((attr)->u.unsnd)
603 #define DW_BLOCK(attr) ((attr)->u.blk)
604 #define DW_SND(attr) ((attr)->u.snd)
605 #define DW_ADDR(attr) ((attr)->u.addr)
606 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
608 /* Blocks are a bunch of untyped bytes. */
615 #ifndef ATTR_ALLOC_CHUNK
616 #define ATTR_ALLOC_CHUNK 4
619 /* Allocate fields for structs, unions and enums in this size. */
620 #ifndef DW_FIELD_ALLOC_CHUNK
621 #define DW_FIELD_ALLOC_CHUNK 4
624 /* A zeroed version of a partial die for initialization purposes. */
625 static struct partial_die_info zeroed_partial_die
;
627 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
628 but this would require a corresponding change in unpack_field_as_long
630 static int bits_per_byte
= 8;
632 /* The routines that read and process dies for a C struct or C++ class
633 pass lists of data member fields and lists of member function fields
634 in an instance of a field_info structure, as defined below. */
637 /* List of data member and baseclasses fields. */
640 struct nextfield
*next
;
645 *fields
, *baseclasses
;
647 /* Number of fields (including baseclasses). */
650 /* Number of baseclasses. */
653 /* Set if the accesibility of one of the fields is not public. */
654 int non_public_fields
;
656 /* Member function fields array, entries are allocated in the order they
657 are encountered in the object file. */
660 struct nextfnfield
*next
;
661 struct fn_field fnfield
;
665 /* Member function fieldlist array, contains name of possibly overloaded
666 member function, number of overloaded member functions and a pointer
667 to the head of the member function field chain. */
672 struct nextfnfield
*head
;
676 /* Number of entries in the fnfieldlists array. */
680 /* One item on the queue of compilation units to read in full symbols
682 struct dwarf2_queue_item
684 struct dwarf2_per_cu_data
*per_cu
;
685 struct dwarf2_queue_item
*next
;
688 /* The current queue. */
689 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
691 /* Loaded secondary compilation units are kept in memory until they
692 have not been referenced for the processing of this many
693 compilation units. Set this to zero to disable caching. Cache
694 sizes of up to at least twenty will improve startup time for
695 typical inter-CU-reference binaries, at an obvious memory cost. */
696 static int dwarf2_max_cache_age
= 5;
698 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
699 struct cmd_list_element
*c
, const char *value
)
701 fprintf_filtered (file
, _("\
702 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
707 /* Various complaints about symbol reading that don't abort the process */
710 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
712 complaint (&symfile_complaints
,
713 _("statement list doesn't fit in .debug_line section"));
717 dwarf2_debug_line_missing_file_complaint (void)
719 complaint (&symfile_complaints
,
720 _(".debug_line section has line data without a file"));
724 dwarf2_debug_line_missing_end_sequence_complaint (void)
726 complaint (&symfile_complaints
,
727 _(".debug_line section has line program sequence without an end"));
731 dwarf2_complex_location_expr_complaint (void)
733 complaint (&symfile_complaints
, _("location expression too complex"));
737 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
740 complaint (&symfile_complaints
,
741 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
746 dwarf2_macros_too_long_complaint (void)
748 complaint (&symfile_complaints
,
749 _("macro info runs off end of `.debug_macinfo' section"));
753 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
755 complaint (&symfile_complaints
,
756 _("macro debug info contains a malformed macro definition:\n`%s'"),
761 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
763 complaint (&symfile_complaints
,
764 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
767 /* local function prototypes */
769 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
772 static void dwarf2_build_psymtabs_easy (struct objfile
*);
775 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
778 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
780 struct partial_symtab
*);
782 static void dwarf2_build_psymtabs_hard (struct objfile
*);
784 static void scan_partial_symbols (struct partial_die_info
*,
785 CORE_ADDR
*, CORE_ADDR
*,
786 int, struct dwarf2_cu
*);
788 static void add_partial_symbol (struct partial_die_info
*,
791 static int pdi_needs_namespace (enum dwarf_tag tag
);
793 static void add_partial_namespace (struct partial_die_info
*pdi
,
794 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
795 int need_pc
, struct dwarf2_cu
*cu
);
797 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
798 CORE_ADDR
*highpc
, int need_pc
,
799 struct dwarf2_cu
*cu
);
801 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
802 struct dwarf2_cu
*cu
);
804 static void add_partial_subprogram (struct partial_die_info
*pdi
,
805 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
806 int need_pc
, struct dwarf2_cu
*cu
);
808 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
809 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
810 bfd
*abfd
, struct dwarf2_cu
*cu
);
812 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
814 static void psymtab_to_symtab_1 (struct partial_symtab
*);
816 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
818 static void dwarf2_free_abbrev_table (void *);
820 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
823 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
826 static struct partial_die_info
*load_partial_dies (bfd
*,
827 gdb_byte
*, gdb_byte
*,
828 int, struct dwarf2_cu
*);
830 static gdb_byte
*read_partial_die (struct partial_die_info
*,
831 struct abbrev_info
*abbrev
,
833 gdb_byte
*, gdb_byte
*,
836 static struct partial_die_info
*find_partial_die (unsigned int,
839 static void fixup_partial_die (struct partial_die_info
*,
842 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
843 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
845 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
846 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
848 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
850 static int read_1_signed_byte (bfd
*, gdb_byte
*);
852 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
854 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
856 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
858 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
861 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
863 static LONGEST read_checked_initial_length_and_offset
864 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
865 unsigned int *, unsigned int *);
867 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
870 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
872 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
874 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
876 static char *read_indirect_string (bfd
*, gdb_byte
*,
877 const struct comp_unit_head
*,
880 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
882 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
884 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
886 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
888 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
891 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
895 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
896 struct dwarf2_cu
*cu
);
898 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
900 static struct die_info
*die_specification (struct die_info
*die
,
901 struct dwarf2_cu
**);
903 static void free_line_header (struct line_header
*lh
);
905 static void add_file_name (struct line_header
*, char *, unsigned int,
906 unsigned int, unsigned int);
908 static struct line_header
*(dwarf_decode_line_header
909 (unsigned int offset
,
910 bfd
*abfd
, struct dwarf2_cu
*cu
));
912 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
913 struct dwarf2_cu
*, struct partial_symtab
*);
915 static void dwarf2_start_subfile (char *, char *, char *);
917 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
920 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
923 static void dwarf2_const_value_data (struct attribute
*attr
,
927 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
929 static int need_gnat_info (struct dwarf2_cu
*);
931 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
933 static void set_descriptive_type (struct type
*, struct die_info
*,
936 static struct type
*die_containing_type (struct die_info
*,
939 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
941 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
943 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
945 static char *typename_concat (struct obstack
*,
950 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
952 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
954 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
956 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
958 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
959 struct dwarf2_cu
*, struct partial_symtab
*);
961 static int dwarf2_get_pc_bounds (struct die_info
*,
962 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
963 struct partial_symtab
*);
965 static void get_scope_pc_bounds (struct die_info
*,
966 CORE_ADDR
*, CORE_ADDR
*,
969 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
970 CORE_ADDR
, struct dwarf2_cu
*);
972 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
975 static void dwarf2_attach_fields_to_type (struct field_info
*,
976 struct type
*, struct dwarf2_cu
*);
978 static void dwarf2_add_member_fn (struct field_info
*,
979 struct die_info
*, struct type
*,
982 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
983 struct type
*, struct dwarf2_cu
*);
985 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
987 static const char *determine_class_name (struct die_info
*die
,
988 struct dwarf2_cu
*cu
);
990 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
992 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
994 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
996 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
998 static const char *namespace_name (struct die_info
*die
,
999 int *is_anonymous
, struct dwarf2_cu
*);
1001 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1003 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1005 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1006 struct dwarf2_cu
*);
1008 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1010 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1012 gdb_byte
**new_info_ptr
,
1013 struct die_info
*parent
);
1015 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1017 gdb_byte
**new_info_ptr
,
1018 struct die_info
*parent
);
1020 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1022 gdb_byte
**new_info_ptr
,
1023 struct die_info
*parent
);
1025 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1026 struct die_info
**, gdb_byte
*,
1029 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1031 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
1033 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1036 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1038 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1039 struct dwarf2_cu
**);
1041 static char *dwarf_tag_name (unsigned int);
1043 static char *dwarf_attr_name (unsigned int);
1045 static char *dwarf_form_name (unsigned int);
1047 static char *dwarf_stack_op_name (unsigned int);
1049 static char *dwarf_bool_name (unsigned int);
1051 static char *dwarf_type_encoding_name (unsigned int);
1054 static char *dwarf_cfi_name (unsigned int);
1057 static struct die_info
*sibling_die (struct die_info
*);
1059 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1061 static void dump_die_for_error (struct die_info
*);
1063 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1066 /*static*/ void dump_die (struct die_info
*, int max_level
);
1068 static void store_in_ref_table (struct die_info
*,
1069 struct dwarf2_cu
*);
1071 static int is_ref_attr (struct attribute
*);
1073 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1075 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1077 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1079 struct dwarf2_cu
**);
1081 static struct die_info
*follow_die_ref (struct die_info
*,
1083 struct dwarf2_cu
**);
1085 static struct die_info
*follow_die_sig (struct die_info
*,
1087 struct dwarf2_cu
**);
1089 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1090 unsigned int offset
);
1092 static void read_signatured_type (struct objfile
*,
1093 struct signatured_type
*type_sig
);
1095 /* memory allocation interface */
1097 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1099 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1101 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1103 static void initialize_cu_func_list (struct dwarf2_cu
*);
1105 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1106 struct dwarf2_cu
*);
1108 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1109 char *, bfd
*, struct dwarf2_cu
*);
1111 static int attr_form_is_block (struct attribute
*);
1113 static int attr_form_is_section_offset (struct attribute
*);
1115 static int attr_form_is_constant (struct attribute
*);
1117 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1119 struct dwarf2_cu
*cu
);
1121 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1122 struct abbrev_info
*abbrev
,
1123 struct dwarf2_cu
*cu
);
1125 static void free_stack_comp_unit (void *);
1127 static hashval_t
partial_die_hash (const void *item
);
1129 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1131 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1132 (unsigned int offset
, struct objfile
*objfile
);
1134 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1135 (unsigned int offset
, struct objfile
*objfile
);
1137 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1139 static void free_one_comp_unit (void *);
1141 static void free_cached_comp_units (void *);
1143 static void age_cached_comp_units (void);
1145 static void free_one_cached_comp_unit (void *);
1147 static struct type
*set_die_type (struct die_info
*, struct type
*,
1148 struct dwarf2_cu
*);
1150 static void create_all_comp_units (struct objfile
*);
1152 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1155 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1157 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1158 struct dwarf2_per_cu_data
*);
1160 static void dwarf2_mark (struct dwarf2_cu
*);
1162 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1164 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1166 /* Try to locate the sections we need for DWARF 2 debugging
1167 information and return true if we have enough to do something. */
1170 dwarf2_has_info (struct objfile
*objfile
)
1172 struct dwarf2_per_objfile
*data
;
1174 /* Initialize per-objfile state. */
1175 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1176 memset (data
, 0, sizeof (*data
));
1177 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1178 dwarf2_per_objfile
= data
;
1180 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1181 return (data
->info
.asection
!= NULL
&& data
->abbrev
.asection
!= NULL
);
1184 /* When loading sections, we can either look for ".<name>", or for
1185 * ".z<name>", which indicates a compressed section. */
1188 section_is_p (const char *section_name
, const char *name
)
1190 return (section_name
[0] == '.'
1191 && (strcmp (section_name
+ 1, name
) == 0
1192 || (section_name
[1] == 'z'
1193 && strcmp (section_name
+ 2, name
) == 0)));
1196 /* This function is mapped across the sections and remembers the
1197 offset and size of each of the debugging sections we are interested
1201 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1203 if (section_is_p (sectp
->name
, INFO_SECTION
))
1205 dwarf2_per_objfile
->info
.asection
= sectp
;
1206 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1208 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1210 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1211 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1215 dwarf2_per_objfile
->line
.asection
= sectp
;
1216 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1218 else if (section_is_p (sectp
->name
, PUBNAMES_SECTION
))
1220 dwarf2_per_objfile
->pubnames
.asection
= sectp
;
1221 dwarf2_per_objfile
->pubnames
.size
= bfd_get_section_size (sectp
);
1223 else if (section_is_p (sectp
->name
, ARANGES_SECTION
))
1225 dwarf2_per_objfile
->aranges
.asection
= sectp
;
1226 dwarf2_per_objfile
->aranges
.size
= bfd_get_section_size (sectp
);
1228 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1230 dwarf2_per_objfile
->loc
.asection
= sectp
;
1231 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1233 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1235 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1236 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1238 else if (section_is_p (sectp
->name
, STR_SECTION
))
1240 dwarf2_per_objfile
->str
.asection
= sectp
;
1241 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1243 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1245 dwarf2_per_objfile
->frame
.asection
= sectp
;
1246 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1248 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1250 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1251 if (aflag
& SEC_HAS_CONTENTS
)
1253 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1254 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1257 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1259 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1260 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1262 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1264 dwarf2_per_objfile
->types
.asection
= sectp
;
1265 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1268 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1269 && bfd_section_vma (abfd
, sectp
) == 0)
1270 dwarf2_per_objfile
->has_section_at_zero
= 1;
1273 /* Decompress a section that was compressed using zlib. Store the
1274 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1277 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1278 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1280 bfd
*abfd
= objfile
->obfd
;
1282 error (_("Support for zlib-compressed DWARF data (from '%s') "
1283 "is disabled in this copy of GDB"),
1284 bfd_get_filename (abfd
));
1286 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1287 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1288 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1289 bfd_size_type uncompressed_size
;
1290 gdb_byte
*uncompressed_buffer
;
1293 int header_size
= 12;
1295 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1296 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1297 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1298 bfd_get_filename (abfd
));
1300 /* Read the zlib header. In this case, it should be "ZLIB" followed
1301 by the uncompressed section size, 8 bytes in big-endian order. */
1302 if (compressed_size
< header_size
1303 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1304 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1305 bfd_get_filename (abfd
));
1306 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1307 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1308 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1309 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1310 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1311 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1312 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1313 uncompressed_size
+= compressed_buffer
[11];
1315 /* It is possible the section consists of several compressed
1316 buffers concatenated together, so we uncompress in a loop. */
1320 strm
.avail_in
= compressed_size
- header_size
;
1321 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1322 strm
.avail_out
= uncompressed_size
;
1323 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1325 rc
= inflateInit (&strm
);
1326 while (strm
.avail_in
> 0)
1329 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1330 bfd_get_filename (abfd
), rc
);
1331 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1332 + (uncompressed_size
- strm
.avail_out
));
1333 rc
= inflate (&strm
, Z_FINISH
);
1334 if (rc
!= Z_STREAM_END
)
1335 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1336 bfd_get_filename (abfd
), rc
);
1337 rc
= inflateReset (&strm
);
1339 rc
= inflateEnd (&strm
);
1341 || strm
.avail_out
!= 0)
1342 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1343 bfd_get_filename (abfd
), rc
);
1345 do_cleanups (cleanup
);
1346 *outbuf
= uncompressed_buffer
;
1347 *outsize
= uncompressed_size
;
1351 /* Read the contents of the section SECTP from object file specified by
1352 OBJFILE, store info about the section into INFO.
1353 If the section is compressed, uncompress it before returning. */
1356 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1358 bfd
*abfd
= objfile
->obfd
;
1359 asection
*sectp
= info
->asection
;
1360 gdb_byte
*buf
, *retbuf
;
1361 unsigned char header
[4];
1363 info
->buffer
= NULL
;
1364 info
->was_mmapped
= 0;
1366 if (info
->asection
== NULL
|| info
->size
== 0)
1369 /* Check if the file has a 4-byte header indicating compression. */
1370 if (info
->size
> sizeof (header
)
1371 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1372 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1374 /* Upon decompression, update the buffer and its size. */
1375 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1377 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1385 pagesize
= getpagesize ();
1387 /* Only try to mmap sections which are large enough: we don't want to
1388 waste space due to fragmentation. Also, only try mmap for sections
1389 without relocations. */
1391 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1393 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1394 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1395 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1396 MAP_PRIVATE
, pg_offset
);
1398 if (retbuf
!= MAP_FAILED
)
1400 info
->was_mmapped
= 1;
1401 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1407 /* If we get here, we are a normal, not-compressed section. */
1409 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1411 /* When debugging .o files, we may need to apply relocations; see
1412 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1413 We never compress sections in .o files, so we only need to
1414 try this when the section is not compressed. */
1415 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
1418 info
->buffer
= retbuf
;
1422 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1423 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1424 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1425 bfd_get_filename (abfd
));
1428 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1432 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1433 asection
**sectp
, gdb_byte
**bufp
,
1434 bfd_size_type
*sizep
)
1436 struct dwarf2_per_objfile
*data
1437 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1438 struct dwarf2_section_info
*info
;
1439 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1440 info
= &data
->eh_frame
;
1441 else if (section_is_p (section_name
, FRAME_SECTION
))
1442 info
= &data
->frame
;
1446 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1447 /* We haven't read this section in yet. Do it now. */
1448 dwarf2_read_section (objfile
, info
);
1450 *sectp
= info
->asection
;
1451 *bufp
= info
->buffer
;
1452 *sizep
= info
->size
;
1455 /* Build a partial symbol table. */
1458 dwarf2_build_psymtabs (struct objfile
*objfile
)
1460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
1461 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->abbrev
);
1462 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->line
);
1463 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->str
);
1464 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->macinfo
);
1465 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
1466 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1467 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->loc
);
1468 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->eh_frame
);
1469 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->frame
);
1471 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1473 init_psymbol_list (objfile
, 1024);
1477 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1479 /* Things are significantly easier if we have .debug_aranges and
1480 .debug_pubnames sections */
1482 dwarf2_build_psymtabs_easy (objfile
);
1486 /* only test this case for now */
1488 /* In this case we have to work a bit harder */
1489 dwarf2_build_psymtabs_hard (objfile
);
1494 /* Build the partial symbol table from the information in the
1495 .debug_pubnames and .debug_aranges sections. */
1498 dwarf2_build_psymtabs_easy (struct objfile
*objfile
)
1500 bfd
*abfd
= objfile
->obfd
;
1501 char *aranges_buffer
, *pubnames_buffer
;
1502 char *aranges_ptr
, *pubnames_ptr
;
1503 unsigned int entry_length
, version
, info_offset
, info_size
;
1505 pubnames_buffer
= dwarf2_read_section (objfile
,
1506 dwarf_pubnames_section
);
1507 pubnames_ptr
= pubnames_buffer
;
1508 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames
.size
)
1510 unsigned int bytes_read
;
1512 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &bytes_read
);
1513 pubnames_ptr
+= bytes_read
;
1514 version
= read_1_byte (abfd
, pubnames_ptr
);
1516 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1518 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1522 aranges_buffer
= dwarf2_read_section (objfile
,
1523 dwarf_aranges_section
);
1528 /* Return TRUE if OFFSET is within CU_HEADER. */
1531 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1533 unsigned int bottom
= cu_header
->offset
;
1534 unsigned int top
= (cu_header
->offset
1536 + cu_header
->initial_length_size
);
1537 return (offset
>= bottom
&& offset
< top
);
1540 /* Read in the comp unit header information from the debug_info at info_ptr.
1541 NOTE: This leaves members offset, first_die_offset to be filled in
1545 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1546 gdb_byte
*info_ptr
, bfd
*abfd
)
1549 unsigned int bytes_read
;
1551 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1552 cu_header
->initial_length_size
= bytes_read
;
1553 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1554 info_ptr
+= bytes_read
;
1555 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1557 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1559 info_ptr
+= bytes_read
;
1560 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1562 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1563 if (signed_addr
< 0)
1564 internal_error (__FILE__
, __LINE__
,
1565 _("read_comp_unit_head: dwarf from non elf file"));
1566 cu_header
->signed_addr_p
= signed_addr
;
1572 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1573 gdb_byte
*buffer
, unsigned int buffer_size
,
1576 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1578 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1580 if (header
->version
!= 2 && header
->version
!= 3)
1581 error (_("Dwarf Error: wrong version in compilation unit header "
1582 "(is %d, should be %d) [in module %s]"), header
->version
,
1583 2, bfd_get_filename (abfd
));
1585 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1586 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1587 "(offset 0x%lx + 6) [in module %s]"),
1588 (long) header
->abbrev_offset
,
1589 (long) (beg_of_comp_unit
- buffer
),
1590 bfd_get_filename (abfd
));
1592 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1593 > buffer
+ buffer_size
)
1594 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1595 "(offset 0x%lx + 0) [in module %s]"),
1596 (long) header
->length
,
1597 (long) (beg_of_comp_unit
- buffer
),
1598 bfd_get_filename (abfd
));
1603 /* Read in the types comp unit header information from .debug_types entry at
1604 types_ptr. The result is a pointer to one past the end of the header. */
1607 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1608 ULONGEST
*signature
,
1609 gdb_byte
*types_ptr
, bfd
*abfd
)
1611 unsigned int bytes_read
;
1612 gdb_byte
*initial_types_ptr
= types_ptr
;
1614 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1616 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1618 *signature
= read_8_bytes (abfd
, types_ptr
);
1620 types_ptr
+= cu_header
->offset_size
;
1621 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1626 /* Allocate a new partial symtab for file named NAME and mark this new
1627 partial symtab as being an include of PST. */
1630 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1631 struct objfile
*objfile
)
1633 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1635 subpst
->section_offsets
= pst
->section_offsets
;
1636 subpst
->textlow
= 0;
1637 subpst
->texthigh
= 0;
1639 subpst
->dependencies
= (struct partial_symtab
**)
1640 obstack_alloc (&objfile
->objfile_obstack
,
1641 sizeof (struct partial_symtab
*));
1642 subpst
->dependencies
[0] = pst
;
1643 subpst
->number_of_dependencies
= 1;
1645 subpst
->globals_offset
= 0;
1646 subpst
->n_global_syms
= 0;
1647 subpst
->statics_offset
= 0;
1648 subpst
->n_static_syms
= 0;
1649 subpst
->symtab
= NULL
;
1650 subpst
->read_symtab
= pst
->read_symtab
;
1653 /* No private part is necessary for include psymtabs. This property
1654 can be used to differentiate between such include psymtabs and
1655 the regular ones. */
1656 subpst
->read_symtab_private
= NULL
;
1659 /* Read the Line Number Program data and extract the list of files
1660 included by the source file represented by PST. Build an include
1661 partial symtab for each of these included files. */
1664 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1665 struct die_info
*die
,
1666 struct partial_symtab
*pst
)
1668 struct objfile
*objfile
= cu
->objfile
;
1669 bfd
*abfd
= objfile
->obfd
;
1670 struct line_header
*lh
= NULL
;
1671 struct attribute
*attr
;
1673 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1676 unsigned int line_offset
= DW_UNSND (attr
);
1677 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1680 return; /* No linetable, so no includes. */
1682 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1684 free_line_header (lh
);
1688 hash_type_signature (const void *item
)
1690 const struct signatured_type
*type_sig
= item
;
1691 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1692 return type_sig
->signature
;
1696 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1698 const struct signatured_type
*lhs
= item_lhs
;
1699 const struct signatured_type
*rhs
= item_rhs
;
1700 return lhs
->signature
== rhs
->signature
;
1703 /* Create the hash table of all entries in the .debug_types section.
1704 The result is zero if there is an error (e.g. missing .debug_types section),
1705 otherwise non-zero. */
1708 create_debug_types_hash_table (struct objfile
*objfile
)
1710 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1713 if (info_ptr
== NULL
)
1715 dwarf2_per_objfile
->signatured_types
= NULL
;
1719 types_htab
= htab_create_alloc_ex (41,
1720 hash_type_signature
,
1723 &objfile
->objfile_obstack
,
1724 hashtab_obstack_allocate
,
1725 dummy_obstack_deallocate
);
1727 if (dwarf2_die_debug
)
1728 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1730 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1732 unsigned int offset
;
1733 unsigned int offset_size
;
1734 unsigned int type_offset
;
1735 unsigned int length
, initial_length_size
;
1736 unsigned short version
;
1738 struct signatured_type
*type_sig
;
1740 gdb_byte
*ptr
= info_ptr
;
1742 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1744 /* We need to read the type's signature in order to build the hash
1745 table, but we don't need to read anything else just yet. */
1747 /* Sanity check to ensure entire cu is present. */
1748 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1749 if (ptr
+ length
+ initial_length_size
1750 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1752 complaint (&symfile_complaints
,
1753 _("debug type entry runs off end of `.debug_types' section, ignored"));
1757 offset_size
= initial_length_size
== 4 ? 4 : 8;
1758 ptr
+= initial_length_size
;
1759 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1761 ptr
+= offset_size
; /* abbrev offset */
1762 ptr
+= 1; /* address size */
1763 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1765 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1767 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1768 memset (type_sig
, 0, sizeof (*type_sig
));
1769 type_sig
->signature
= signature
;
1770 type_sig
->offset
= offset
;
1771 type_sig
->type_offset
= type_offset
;
1773 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1774 gdb_assert (slot
!= NULL
);
1777 if (dwarf2_die_debug
)
1778 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1779 offset
, phex (signature
, sizeof (signature
)));
1781 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1784 dwarf2_per_objfile
->signatured_types
= types_htab
;
1789 /* Lookup a signature based type.
1790 Returns NULL if SIG is not present in the table. */
1792 static struct signatured_type
*
1793 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1795 struct signatured_type find_entry
, *entry
;
1797 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1799 complaint (&symfile_complaints
,
1800 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1804 find_entry
.signature
= sig
;
1805 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1809 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1812 init_cu_die_reader (struct die_reader_specs
*reader
,
1813 struct dwarf2_cu
*cu
)
1815 reader
->abfd
= cu
->objfile
->obfd
;
1817 if (cu
->per_cu
->from_debug_types
)
1818 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1820 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1823 /* Find the base address of the compilation unit for range lists and
1824 location lists. It will normally be specified by DW_AT_low_pc.
1825 In DWARF-3 draft 4, the base address could be overridden by
1826 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1827 compilation units with discontinuous ranges. */
1830 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1832 struct attribute
*attr
;
1835 cu
->base_address
= 0;
1837 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1840 cu
->base_address
= DW_ADDR (attr
);
1845 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1848 cu
->base_address
= DW_ADDR (attr
);
1854 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1855 to combine the common parts.
1856 Process a compilation unit for a psymtab.
1857 BUFFER is a pointer to the beginning of the dwarf section buffer,
1858 either .debug_info or debug_types.
1859 INFO_PTR is a pointer to the start of the CU.
1860 Returns a pointer to the next CU. */
1863 process_psymtab_comp_unit (struct objfile
*objfile
,
1864 struct dwarf2_per_cu_data
*this_cu
,
1865 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1866 unsigned int buffer_size
)
1868 bfd
*abfd
= objfile
->obfd
;
1869 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1870 struct die_info
*comp_unit_die
;
1871 struct partial_symtab
*pst
;
1873 struct cleanup
*back_to_inner
;
1874 struct dwarf2_cu cu
;
1875 unsigned int bytes_read
;
1876 int has_children
, has_pc_info
;
1877 struct attribute
*attr
;
1879 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1880 struct die_reader_specs reader_specs
;
1882 memset (&cu
, 0, sizeof (cu
));
1883 cu
.objfile
= objfile
;
1884 obstack_init (&cu
.comp_unit_obstack
);
1886 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1888 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1889 buffer
, buffer_size
,
1892 /* Complete the cu_header. */
1893 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1894 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1896 cu
.list_in_scope
= &file_symbols
;
1898 /* If this compilation unit was already read in, free the
1899 cached copy in order to read it in again. This is
1900 necessary because we skipped some symbols when we first
1901 read in the compilation unit (see load_partial_dies).
1902 This problem could be avoided, but the benefit is
1904 if (this_cu
->cu
!= NULL
)
1905 free_one_cached_comp_unit (this_cu
->cu
);
1907 /* Note that this is a pointer to our stack frame, being
1908 added to a global data structure. It will be cleaned up
1909 in free_stack_comp_unit when we finish with this
1910 compilation unit. */
1912 cu
.per_cu
= this_cu
;
1914 /* Read the abbrevs for this compilation unit into a table. */
1915 dwarf2_read_abbrevs (abfd
, &cu
);
1916 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1918 /* Read the compilation unit die. */
1919 if (this_cu
->from_debug_types
)
1920 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1921 init_cu_die_reader (&reader_specs
, &cu
);
1922 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1925 if (this_cu
->from_debug_types
)
1927 /* offset,length haven't been set yet for type units. */
1928 this_cu
->offset
= cu
.header
.offset
;
1929 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1931 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1933 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1934 + cu
.header
.initial_length_size
);
1935 do_cleanups (back_to_inner
);
1939 /* Set the language we're debugging. */
1940 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1942 set_cu_language (DW_UNSND (attr
), &cu
);
1944 set_cu_language (language_minimal
, &cu
);
1946 /* Allocate a new partial symbol table structure. */
1947 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1948 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1949 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1950 /* TEXTLOW and TEXTHIGH are set below. */
1952 objfile
->global_psymbols
.next
,
1953 objfile
->static_psymbols
.next
);
1955 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1957 pst
->dirname
= DW_STRING (attr
);
1959 pst
->read_symtab_private
= (char *) this_cu
;
1961 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1963 /* Store the function that reads in the rest of the symbol table */
1964 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1966 this_cu
->psymtab
= pst
;
1968 dwarf2_find_base_address (comp_unit_die
, &cu
);
1970 /* Possibly set the default values of LOWPC and HIGHPC from
1972 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1973 &best_highpc
, &cu
, pst
);
1974 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1975 /* Store the contiguous range if it is not empty; it can be empty for
1976 CUs with no code. */
1977 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1978 best_lowpc
+ baseaddr
,
1979 best_highpc
+ baseaddr
- 1, pst
);
1981 /* Check if comp unit has_children.
1982 If so, read the rest of the partial symbols from this comp unit.
1983 If not, there's no more debug_info for this comp unit. */
1986 struct partial_die_info
*first_die
;
1987 CORE_ADDR lowpc
, highpc
;
1989 lowpc
= ((CORE_ADDR
) -1);
1990 highpc
= ((CORE_ADDR
) 0);
1992 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1994 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1995 ! has_pc_info
, &cu
);
1997 /* If we didn't find a lowpc, set it to highpc to avoid
1998 complaints from `maint check'. */
1999 if (lowpc
== ((CORE_ADDR
) -1))
2002 /* If the compilation unit didn't have an explicit address range,
2003 then use the information extracted from its child dies. */
2007 best_highpc
= highpc
;
2010 pst
->textlow
= best_lowpc
+ baseaddr
;
2011 pst
->texthigh
= best_highpc
+ baseaddr
;
2013 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
2014 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2015 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
2016 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2017 sort_pst_symbols (pst
);
2019 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
2020 + cu
.header
.initial_length_size
);
2022 if (this_cu
->from_debug_types
)
2024 /* It's not clear we want to do anything with stmt lists here.
2025 Waiting to see what gcc ultimately does. */
2029 /* Get the list of files included in the current compilation unit,
2030 and build a psymtab for each of them. */
2031 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
2034 do_cleanups (back_to_inner
);
2039 /* Traversal function for htab_traverse_noresize.
2040 Process one .debug_types comp-unit. */
2043 process_type_comp_unit (void **slot
, void *info
)
2045 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
2046 struct objfile
*objfile
= (struct objfile
*) info
;
2047 struct dwarf2_per_cu_data
*this_cu
;
2049 this_cu
= &entry
->per_cu
;
2050 this_cu
->from_debug_types
= 1;
2052 process_psymtab_comp_unit (objfile
, this_cu
,
2053 dwarf2_per_objfile
->types
.buffer
,
2054 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
2055 dwarf2_per_objfile
->types
.size
);
2060 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2061 Build partial symbol tables for the .debug_types comp-units. */
2064 build_type_psymtabs (struct objfile
*objfile
)
2066 if (! create_debug_types_hash_table (objfile
))
2069 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2070 process_type_comp_unit
, objfile
);
2073 /* Build the partial symbol table by doing a quick pass through the
2074 .debug_info and .debug_abbrev sections. */
2077 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2079 /* Instead of reading this into a big buffer, we should probably use
2080 mmap() on architectures that support it. (FIXME) */
2081 bfd
*abfd
= objfile
->obfd
;
2083 struct cleanup
*back_to
;
2085 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2087 /* Any cached compilation units will be linked by the per-objfile
2088 read_in_chain. Make sure to free them when we're done. */
2089 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2091 build_type_psymtabs (objfile
);
2093 create_all_comp_units (objfile
);
2095 objfile
->psymtabs_addrmap
=
2096 addrmap_create_mutable (&objfile
->objfile_obstack
);
2098 /* Since the objects we're extracting from .debug_info vary in
2099 length, only the individual functions to extract them (like
2100 read_comp_unit_head and load_partial_die) can really know whether
2101 the buffer is large enough to hold another complete object.
2103 At the moment, they don't actually check that. If .debug_info
2104 holds just one extra byte after the last compilation unit's dies,
2105 then read_comp_unit_head will happily read off the end of the
2106 buffer. read_partial_die is similarly casual. Those functions
2109 For this loop condition, simply checking whether there's any data
2110 left at all should be sufficient. */
2112 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2113 + dwarf2_per_objfile
->info
.size
))
2115 struct dwarf2_per_cu_data
*this_cu
;
2117 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2120 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2121 dwarf2_per_objfile
->info
.buffer
,
2123 dwarf2_per_objfile
->info
.size
);
2126 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2127 &objfile
->objfile_obstack
);
2129 do_cleanups (back_to
);
2132 /* Load the partial DIEs for a secondary CU into memory. */
2135 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2136 struct objfile
*objfile
)
2138 bfd
*abfd
= objfile
->obfd
;
2139 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2140 struct die_info
*comp_unit_die
;
2141 struct dwarf2_cu
*cu
;
2142 unsigned int bytes_read
;
2143 struct cleanup
*back_to
;
2144 struct attribute
*attr
;
2146 struct die_reader_specs reader_specs
;
2148 gdb_assert (! this_cu
->from_debug_types
);
2150 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2151 beg_of_comp_unit
= info_ptr
;
2153 cu
= alloc_one_comp_unit (objfile
);
2155 /* ??? Missing cleanup for CU? */
2157 /* Link this compilation unit into the compilation unit tree. */
2159 cu
->per_cu
= this_cu
;
2160 cu
->type_hash
= this_cu
->type_hash
;
2162 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2163 dwarf2_per_objfile
->info
.buffer
,
2164 dwarf2_per_objfile
->info
.size
,
2167 /* Complete the cu_header. */
2168 cu
->header
.offset
= this_cu
->offset
;
2169 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2171 /* Read the abbrevs for this compilation unit into a table. */
2172 dwarf2_read_abbrevs (abfd
, cu
);
2173 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2175 /* Read the compilation unit die. */
2176 init_cu_die_reader (&reader_specs
, cu
);
2177 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2180 /* Set the language we're debugging. */
2181 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2183 set_cu_language (DW_UNSND (attr
), cu
);
2185 set_cu_language (language_minimal
, cu
);
2187 /* Check if comp unit has_children.
2188 If so, read the rest of the partial symbols from this comp unit.
2189 If not, there's no more debug_info for this comp unit. */
2191 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2193 do_cleanups (back_to
);
2196 /* Create a list of all compilation units in OBJFILE. We do this only
2197 if an inter-comp-unit reference is found; presumably if there is one,
2198 there will be many, and one will occur early in the .debug_info section.
2199 So there's no point in building this list incrementally. */
2202 create_all_comp_units (struct objfile
*objfile
)
2206 struct dwarf2_per_cu_data
**all_comp_units
;
2207 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2211 all_comp_units
= xmalloc (n_allocated
2212 * sizeof (struct dwarf2_per_cu_data
*));
2214 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2216 unsigned int length
, initial_length_size
;
2217 gdb_byte
*beg_of_comp_unit
;
2218 struct dwarf2_per_cu_data
*this_cu
;
2219 unsigned int offset
;
2221 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2223 /* Read just enough information to find out where the next
2224 compilation unit is. */
2225 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2226 &initial_length_size
);
2228 /* Save the compilation unit for later lookup. */
2229 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2230 sizeof (struct dwarf2_per_cu_data
));
2231 memset (this_cu
, 0, sizeof (*this_cu
));
2232 this_cu
->offset
= offset
;
2233 this_cu
->length
= length
+ initial_length_size
;
2235 if (n_comp_units
== n_allocated
)
2238 all_comp_units
= xrealloc (all_comp_units
,
2240 * sizeof (struct dwarf2_per_cu_data
*));
2242 all_comp_units
[n_comp_units
++] = this_cu
;
2244 info_ptr
= info_ptr
+ this_cu
->length
;
2247 dwarf2_per_objfile
->all_comp_units
2248 = obstack_alloc (&objfile
->objfile_obstack
,
2249 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2250 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2251 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2252 xfree (all_comp_units
);
2253 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2256 /* Process all loaded DIEs for compilation unit CU, starting at
2257 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2258 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2259 DW_AT_ranges). If NEED_PC is set, then this function will set
2260 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2261 and record the covered ranges in the addrmap. */
2264 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2265 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2267 struct objfile
*objfile
= cu
->objfile
;
2268 bfd
*abfd
= objfile
->obfd
;
2269 struct partial_die_info
*pdi
;
2271 /* Now, march along the PDI's, descending into ones which have
2272 interesting children but skipping the children of the other ones,
2273 until we reach the end of the compilation unit. */
2279 fixup_partial_die (pdi
, cu
);
2281 /* Anonymous namespaces have no name but have interesting
2282 children, so we need to look at them. Ditto for anonymous
2285 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2286 || pdi
->tag
== DW_TAG_enumeration_type
)
2290 case DW_TAG_subprogram
:
2291 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2293 case DW_TAG_variable
:
2294 case DW_TAG_typedef
:
2295 case DW_TAG_union_type
:
2296 if (!pdi
->is_declaration
)
2298 add_partial_symbol (pdi
, cu
);
2301 case DW_TAG_class_type
:
2302 case DW_TAG_interface_type
:
2303 case DW_TAG_structure_type
:
2304 if (!pdi
->is_declaration
)
2306 add_partial_symbol (pdi
, cu
);
2309 case DW_TAG_enumeration_type
:
2310 if (!pdi
->is_declaration
)
2311 add_partial_enumeration (pdi
, cu
);
2313 case DW_TAG_base_type
:
2314 case DW_TAG_subrange_type
:
2315 /* File scope base type definitions are added to the partial
2317 add_partial_symbol (pdi
, cu
);
2319 case DW_TAG_namespace
:
2320 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2323 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2330 /* If the die has a sibling, skip to the sibling. */
2332 pdi
= pdi
->die_sibling
;
2336 /* Functions used to compute the fully scoped name of a partial DIE.
2338 Normally, this is simple. For C++, the parent DIE's fully scoped
2339 name is concatenated with "::" and the partial DIE's name. For
2340 Java, the same thing occurs except that "." is used instead of "::".
2341 Enumerators are an exception; they use the scope of their parent
2342 enumeration type, i.e. the name of the enumeration type is not
2343 prepended to the enumerator.
2345 There are two complexities. One is DW_AT_specification; in this
2346 case "parent" means the parent of the target of the specification,
2347 instead of the direct parent of the DIE. The other is compilers
2348 which do not emit DW_TAG_namespace; in this case we try to guess
2349 the fully qualified name of structure types from their members'
2350 linkage names. This must be done using the DIE's children rather
2351 than the children of any DW_AT_specification target. We only need
2352 to do this for structures at the top level, i.e. if the target of
2353 any DW_AT_specification (if any; otherwise the DIE itself) does not
2356 /* Compute the scope prefix associated with PDI's parent, in
2357 compilation unit CU. The result will be allocated on CU's
2358 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2359 field. NULL is returned if no prefix is necessary. */
2361 partial_die_parent_scope (struct partial_die_info
*pdi
,
2362 struct dwarf2_cu
*cu
)
2364 char *grandparent_scope
;
2365 struct partial_die_info
*parent
, *real_pdi
;
2367 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2368 then this means the parent of the specification DIE. */
2371 while (real_pdi
->has_specification
)
2372 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2374 parent
= real_pdi
->die_parent
;
2378 if (parent
->scope_set
)
2379 return parent
->scope
;
2381 fixup_partial_die (parent
, cu
);
2383 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2385 if (parent
->tag
== DW_TAG_namespace
2386 || parent
->tag
== DW_TAG_structure_type
2387 || parent
->tag
== DW_TAG_class_type
2388 || parent
->tag
== DW_TAG_interface_type
2389 || parent
->tag
== DW_TAG_union_type
2390 || parent
->tag
== DW_TAG_enumeration_type
)
2392 if (grandparent_scope
== NULL
)
2393 parent
->scope
= parent
->name
;
2395 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2398 else if (parent
->tag
== DW_TAG_enumerator
)
2399 /* Enumerators should not get the name of the enumeration as a prefix. */
2400 parent
->scope
= grandparent_scope
;
2403 /* FIXME drow/2004-04-01: What should we be doing with
2404 function-local names? For partial symbols, we should probably be
2406 complaint (&symfile_complaints
,
2407 _("unhandled containing DIE tag %d for DIE at %d"),
2408 parent
->tag
, pdi
->offset
);
2409 parent
->scope
= grandparent_scope
;
2412 parent
->scope_set
= 1;
2413 return parent
->scope
;
2416 /* Return the fully scoped name associated with PDI, from compilation unit
2417 CU. The result will be allocated with malloc. */
2419 partial_die_full_name (struct partial_die_info
*pdi
,
2420 struct dwarf2_cu
*cu
)
2424 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2425 if (parent_scope
== NULL
)
2428 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2432 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2434 struct objfile
*objfile
= cu
->objfile
;
2436 char *actual_name
= NULL
;
2437 const char *my_prefix
;
2438 const struct partial_symbol
*psym
= NULL
;
2440 int built_actual_name
= 0;
2442 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2444 if (pdi_needs_namespace (pdi
->tag
))
2446 actual_name
= partial_die_full_name (pdi
, cu
);
2448 built_actual_name
= 1;
2451 if (actual_name
== NULL
)
2452 actual_name
= pdi
->name
;
2456 case DW_TAG_subprogram
:
2457 if (pdi
->is_external
|| cu
->language
== language_ada
)
2459 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2460 of the global scope. But in Ada, we want to be able to access
2461 nested procedures globally. So all Ada subprograms are stored
2462 in the global scope. */
2463 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2464 mst_text, objfile); */
2465 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2467 VAR_DOMAIN
, LOC_BLOCK
,
2468 &objfile
->global_psymbols
,
2469 0, pdi
->lowpc
+ baseaddr
,
2470 cu
->language
, objfile
);
2474 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2475 mst_file_text, objfile); */
2476 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2478 VAR_DOMAIN
, LOC_BLOCK
,
2479 &objfile
->static_psymbols
,
2480 0, pdi
->lowpc
+ baseaddr
,
2481 cu
->language
, objfile
);
2484 case DW_TAG_variable
:
2485 if (pdi
->is_external
)
2488 Don't enter into the minimal symbol tables as there is
2489 a minimal symbol table entry from the ELF symbols already.
2490 Enter into partial symbol table if it has a location
2491 descriptor or a type.
2492 If the location descriptor is missing, new_symbol will create
2493 a LOC_UNRESOLVED symbol, the address of the variable will then
2494 be determined from the minimal symbol table whenever the variable
2496 The address for the partial symbol table entry is not
2497 used by GDB, but it comes in handy for debugging partial symbol
2501 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2502 if (pdi
->locdesc
|| pdi
->has_type
)
2503 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2505 VAR_DOMAIN
, LOC_STATIC
,
2506 &objfile
->global_psymbols
,
2508 cu
->language
, objfile
);
2512 /* Static Variable. Skip symbols without location descriptors. */
2513 if (pdi
->locdesc
== NULL
)
2515 if (built_actual_name
)
2516 xfree (actual_name
);
2519 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2520 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2521 mst_file_data, objfile); */
2522 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2524 VAR_DOMAIN
, LOC_STATIC
,
2525 &objfile
->static_psymbols
,
2527 cu
->language
, objfile
);
2530 case DW_TAG_typedef
:
2531 case DW_TAG_base_type
:
2532 case DW_TAG_subrange_type
:
2533 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2535 VAR_DOMAIN
, LOC_TYPEDEF
,
2536 &objfile
->static_psymbols
,
2537 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2539 case DW_TAG_namespace
:
2540 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2542 VAR_DOMAIN
, LOC_TYPEDEF
,
2543 &objfile
->global_psymbols
,
2544 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2546 case DW_TAG_class_type
:
2547 case DW_TAG_interface_type
:
2548 case DW_TAG_structure_type
:
2549 case DW_TAG_union_type
:
2550 case DW_TAG_enumeration_type
:
2551 /* Skip external references. The DWARF standard says in the section
2552 about "Structure, Union, and Class Type Entries": "An incomplete
2553 structure, union or class type is represented by a structure,
2554 union or class entry that does not have a byte size attribute
2555 and that has a DW_AT_declaration attribute." */
2556 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2558 if (built_actual_name
)
2559 xfree (actual_name
);
2563 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2564 static vs. global. */
2565 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2567 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2568 (cu
->language
== language_cplus
2569 || cu
->language
== language_java
)
2570 ? &objfile
->global_psymbols
2571 : &objfile
->static_psymbols
,
2572 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2575 case DW_TAG_enumerator
:
2576 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2578 VAR_DOMAIN
, LOC_CONST
,
2579 (cu
->language
== language_cplus
2580 || cu
->language
== language_java
)
2581 ? &objfile
->global_psymbols
2582 : &objfile
->static_psymbols
,
2583 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2589 /* Check to see if we should scan the name for possible namespace
2590 info. Only do this if this is C++, if we don't have namespace
2591 debugging info in the file, if the psym is of an appropriate type
2592 (otherwise we'll have psym == NULL), and if we actually had a
2593 mangled name to begin with. */
2595 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2596 cases which do not set PSYM above? */
2598 if (cu
->language
== language_cplus
2599 && cu
->has_namespace_info
== 0
2601 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2602 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2605 if (built_actual_name
)
2606 xfree (actual_name
);
2609 /* Determine whether a die of type TAG living in a C++ class or
2610 namespace needs to have the name of the scope prepended to the
2611 name listed in the die. */
2614 pdi_needs_namespace (enum dwarf_tag tag
)
2618 case DW_TAG_namespace
:
2619 case DW_TAG_typedef
:
2620 case DW_TAG_class_type
:
2621 case DW_TAG_interface_type
:
2622 case DW_TAG_structure_type
:
2623 case DW_TAG_union_type
:
2624 case DW_TAG_enumeration_type
:
2625 case DW_TAG_enumerator
:
2632 /* Read a partial die corresponding to a namespace; also, add a symbol
2633 corresponding to that namespace to the symbol table. NAMESPACE is
2634 the name of the enclosing namespace. */
2637 add_partial_namespace (struct partial_die_info
*pdi
,
2638 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2639 int need_pc
, struct dwarf2_cu
*cu
)
2641 struct objfile
*objfile
= cu
->objfile
;
2643 /* Add a symbol for the namespace. */
2645 add_partial_symbol (pdi
, cu
);
2647 /* Now scan partial symbols in that namespace. */
2649 if (pdi
->has_children
)
2650 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2653 /* Read a partial die corresponding to a Fortran module. */
2656 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2657 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2659 /* Now scan partial symbols in that module.
2661 FIXME: Support the separate Fortran module namespaces. */
2663 if (pdi
->has_children
)
2664 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2667 /* Read a partial die corresponding to a subprogram and create a partial
2668 symbol for that subprogram. When the CU language allows it, this
2669 routine also defines a partial symbol for each nested subprogram
2670 that this subprogram contains.
2672 DIE my also be a lexical block, in which case we simply search
2673 recursively for suprograms defined inside that lexical block.
2674 Again, this is only performed when the CU language allows this
2675 type of definitions. */
2678 add_partial_subprogram (struct partial_die_info
*pdi
,
2679 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2680 int need_pc
, struct dwarf2_cu
*cu
)
2682 if (pdi
->tag
== DW_TAG_subprogram
)
2684 if (pdi
->has_pc_info
)
2686 if (pdi
->lowpc
< *lowpc
)
2687 *lowpc
= pdi
->lowpc
;
2688 if (pdi
->highpc
> *highpc
)
2689 *highpc
= pdi
->highpc
;
2693 struct objfile
*objfile
= cu
->objfile
;
2695 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2696 SECT_OFF_TEXT (objfile
));
2697 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2698 pdi
->lowpc
, pdi
->highpc
- 1,
2699 cu
->per_cu
->psymtab
);
2701 if (!pdi
->is_declaration
)
2702 add_partial_symbol (pdi
, cu
);
2706 if (! pdi
->has_children
)
2709 if (cu
->language
== language_ada
)
2711 pdi
= pdi
->die_child
;
2714 fixup_partial_die (pdi
, cu
);
2715 if (pdi
->tag
== DW_TAG_subprogram
2716 || pdi
->tag
== DW_TAG_lexical_block
)
2717 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2718 pdi
= pdi
->die_sibling
;
2723 /* See if we can figure out if the class lives in a namespace. We do
2724 this by looking for a member function; its demangled name will
2725 contain namespace info, if there is any. */
2728 guess_structure_name (struct partial_die_info
*struct_pdi
,
2729 struct dwarf2_cu
*cu
)
2731 if ((cu
->language
== language_cplus
2732 || cu
->language
== language_java
)
2733 && cu
->has_namespace_info
== 0
2734 && struct_pdi
->has_children
)
2736 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2737 what template types look like, because the demangler
2738 frequently doesn't give the same name as the debug info. We
2739 could fix this by only using the demangled name to get the
2740 prefix (but see comment in read_structure_type). */
2742 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2743 struct partial_die_info
*real_pdi
;
2745 /* If this DIE (this DIE's specification, if any) has a parent, then
2746 we should not do this. We'll prepend the parent's fully qualified
2747 name when we create the partial symbol. */
2749 real_pdi
= struct_pdi
;
2750 while (real_pdi
->has_specification
)
2751 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2753 if (real_pdi
->die_parent
!= NULL
)
2756 while (child_pdi
!= NULL
)
2758 if (child_pdi
->tag
== DW_TAG_subprogram
)
2760 char *actual_class_name
2761 = language_class_name_from_physname (cu
->language_defn
,
2763 if (actual_class_name
!= NULL
)
2766 = obsavestring (actual_class_name
,
2767 strlen (actual_class_name
),
2768 &cu
->comp_unit_obstack
);
2769 xfree (actual_class_name
);
2774 child_pdi
= child_pdi
->die_sibling
;
2779 /* Read a partial die corresponding to an enumeration type. */
2782 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2783 struct dwarf2_cu
*cu
)
2785 struct objfile
*objfile
= cu
->objfile
;
2786 bfd
*abfd
= objfile
->obfd
;
2787 struct partial_die_info
*pdi
;
2789 if (enum_pdi
->name
!= NULL
)
2790 add_partial_symbol (enum_pdi
, cu
);
2792 pdi
= enum_pdi
->die_child
;
2795 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2796 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2798 add_partial_symbol (pdi
, cu
);
2799 pdi
= pdi
->die_sibling
;
2803 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2804 Return the corresponding abbrev, or NULL if the number is zero (indicating
2805 an empty DIE). In either case *BYTES_READ will be set to the length of
2806 the initial number. */
2808 static struct abbrev_info
*
2809 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2810 struct dwarf2_cu
*cu
)
2812 bfd
*abfd
= cu
->objfile
->obfd
;
2813 unsigned int abbrev_number
;
2814 struct abbrev_info
*abbrev
;
2816 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2818 if (abbrev_number
== 0)
2821 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2824 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2825 bfd_get_filename (abfd
));
2831 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2832 Returns a pointer to the end of a series of DIEs, terminated by an empty
2833 DIE. Any children of the skipped DIEs will also be skipped. */
2836 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2838 struct abbrev_info
*abbrev
;
2839 unsigned int bytes_read
;
2843 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2845 return info_ptr
+ bytes_read
;
2847 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2851 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2852 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2853 abbrev corresponding to that skipped uleb128 should be passed in
2854 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2858 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2859 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2861 unsigned int bytes_read
;
2862 struct attribute attr
;
2863 bfd
*abfd
= cu
->objfile
->obfd
;
2864 unsigned int form
, i
;
2866 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2868 /* The only abbrev we care about is DW_AT_sibling. */
2869 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2871 read_attribute (&attr
, &abbrev
->attrs
[i
],
2872 abfd
, info_ptr
, cu
);
2873 if (attr
.form
== DW_FORM_ref_addr
)
2874 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2876 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2879 /* If it isn't DW_AT_sibling, skip this attribute. */
2880 form
= abbrev
->attrs
[i
].form
;
2885 case DW_FORM_ref_addr
:
2886 info_ptr
+= cu
->header
.addr_size
;
2906 case DW_FORM_string
:
2907 read_string (abfd
, info_ptr
, &bytes_read
);
2908 info_ptr
+= bytes_read
;
2911 info_ptr
+= cu
->header
.offset_size
;
2914 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2915 info_ptr
+= bytes_read
;
2917 case DW_FORM_block1
:
2918 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2920 case DW_FORM_block2
:
2921 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2923 case DW_FORM_block4
:
2924 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2928 case DW_FORM_ref_udata
:
2929 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2931 case DW_FORM_indirect
:
2932 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2933 info_ptr
+= bytes_read
;
2934 /* We need to continue parsing from here, so just go back to
2936 goto skip_attribute
;
2939 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2940 dwarf_form_name (form
),
2941 bfd_get_filename (abfd
));
2945 if (abbrev
->has_children
)
2946 return skip_children (buffer
, info_ptr
, cu
);
2951 /* Locate ORIG_PDI's sibling.
2952 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2956 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2957 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2958 bfd
*abfd
, struct dwarf2_cu
*cu
)
2960 /* Do we know the sibling already? */
2962 if (orig_pdi
->sibling
)
2963 return orig_pdi
->sibling
;
2965 /* Are there any children to deal with? */
2967 if (!orig_pdi
->has_children
)
2970 /* Skip the children the long way. */
2972 return skip_children (buffer
, info_ptr
, cu
);
2975 /* Expand this partial symbol table into a full symbol table. */
2978 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2980 /* FIXME: This is barely more than a stub. */
2985 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2991 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2992 gdb_flush (gdb_stdout
);
2995 /* Restore our global data. */
2996 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2997 dwarf2_objfile_data_key
);
2999 /* If this psymtab is constructed from a debug-only objfile, the
3000 has_section_at_zero flag will not necessarily be correct. We
3001 can get the correct value for this flag by looking at the data
3002 associated with the (presumably stripped) associated objfile. */
3003 if (pst
->objfile
->separate_debug_objfile_backlink
)
3005 struct dwarf2_per_objfile
*dpo_backlink
3006 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
3007 dwarf2_objfile_data_key
);
3008 dwarf2_per_objfile
->has_section_at_zero
3009 = dpo_backlink
->has_section_at_zero
;
3012 psymtab_to_symtab_1 (pst
);
3014 /* Finish up the debug error message. */
3016 printf_filtered (_("done.\n"));
3021 /* Add PER_CU to the queue. */
3024 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3026 struct dwarf2_queue_item
*item
;
3029 item
= xmalloc (sizeof (*item
));
3030 item
->per_cu
= per_cu
;
3033 if (dwarf2_queue
== NULL
)
3034 dwarf2_queue
= item
;
3036 dwarf2_queue_tail
->next
= item
;
3038 dwarf2_queue_tail
= item
;
3041 /* Process the queue. */
3044 process_queue (struct objfile
*objfile
)
3046 struct dwarf2_queue_item
*item
, *next_item
;
3048 /* The queue starts out with one item, but following a DIE reference
3049 may load a new CU, adding it to the end of the queue. */
3050 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
3052 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
3053 process_full_comp_unit (item
->per_cu
);
3055 item
->per_cu
->queued
= 0;
3056 next_item
= item
->next
;
3060 dwarf2_queue_tail
= NULL
;
3063 /* Free all allocated queue entries. This function only releases anything if
3064 an error was thrown; if the queue was processed then it would have been
3065 freed as we went along. */
3068 dwarf2_release_queue (void *dummy
)
3070 struct dwarf2_queue_item
*item
, *last
;
3072 item
= dwarf2_queue
;
3075 /* Anything still marked queued is likely to be in an
3076 inconsistent state, so discard it. */
3077 if (item
->per_cu
->queued
)
3079 if (item
->per_cu
->cu
!= NULL
)
3080 free_one_cached_comp_unit (item
->per_cu
->cu
);
3081 item
->per_cu
->queued
= 0;
3089 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3092 /* Read in full symbols for PST, and anything it depends on. */
3095 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3097 struct dwarf2_per_cu_data
*per_cu
;
3098 struct cleanup
*back_to
;
3101 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3102 if (!pst
->dependencies
[i
]->readin
)
3104 /* Inform about additional files that need to be read in. */
3107 /* FIXME: i18n: Need to make this a single string. */
3108 fputs_filtered (" ", gdb_stdout
);
3110 fputs_filtered ("and ", gdb_stdout
);
3112 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3113 wrap_here (""); /* Flush output */
3114 gdb_flush (gdb_stdout
);
3116 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3119 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
3123 /* It's an include file, no symbols to read for it.
3124 Everything is in the parent symtab. */
3129 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3131 queue_comp_unit (per_cu
, pst
->objfile
);
3133 if (per_cu
->from_debug_types
)
3134 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3136 load_full_comp_unit (per_cu
, pst
->objfile
);
3138 process_queue (pst
->objfile
);
3140 /* Age the cache, releasing compilation units that have not
3141 been used recently. */
3142 age_cached_comp_units ();
3144 do_cleanups (back_to
);
3147 /* Load the DIEs associated with PER_CU into memory. */
3150 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3152 bfd
*abfd
= objfile
->obfd
;
3153 struct dwarf2_cu
*cu
;
3154 unsigned int offset
;
3155 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3156 struct cleanup
*back_to
, *free_cu_cleanup
;
3157 struct attribute
*attr
;
3160 gdb_assert (! per_cu
->from_debug_types
);
3162 /* Set local variables from the partial symbol table info. */
3163 offset
= per_cu
->offset
;
3165 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3166 beg_of_comp_unit
= info_ptr
;
3168 cu
= alloc_one_comp_unit (objfile
);
3170 /* If an error occurs while loading, release our storage. */
3171 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3173 /* Read in the comp_unit header. */
3174 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3176 /* Complete the cu_header. */
3177 cu
->header
.offset
= offset
;
3178 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3180 /* Read the abbrevs for this compilation unit. */
3181 dwarf2_read_abbrevs (abfd
, cu
);
3182 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3184 /* Link this compilation unit into the compilation unit tree. */
3186 cu
->per_cu
= per_cu
;
3187 cu
->type_hash
= per_cu
->type_hash
;
3189 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3191 /* We try not to read any attributes in this function, because not
3192 all objfiles needed for references have been loaded yet, and symbol
3193 table processing isn't initialized. But we have to set the CU language,
3194 or we won't be able to build types correctly. */
3195 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3197 set_cu_language (DW_UNSND (attr
), cu
);
3199 set_cu_language (language_minimal
, cu
);
3201 /* Link this CU into read_in_chain. */
3202 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3203 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3205 do_cleanups (back_to
);
3207 /* We've successfully allocated this compilation unit. Let our caller
3208 clean it up when finished with it. */
3209 discard_cleanups (free_cu_cleanup
);
3212 /* Generate full symbol information for PST and CU, whose DIEs have
3213 already been loaded into memory. */
3216 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3218 struct partial_symtab
*pst
= per_cu
->psymtab
;
3219 struct dwarf2_cu
*cu
= per_cu
->cu
;
3220 struct objfile
*objfile
= pst
->objfile
;
3221 bfd
*abfd
= objfile
->obfd
;
3222 CORE_ADDR lowpc
, highpc
;
3223 struct symtab
*symtab
;
3224 struct cleanup
*back_to
;
3227 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3230 back_to
= make_cleanup (really_free_pendings
, NULL
);
3232 cu
->list_in_scope
= &file_symbols
;
3234 dwarf2_find_base_address (cu
->dies
, cu
);
3236 /* Do line number decoding in read_file_scope () */
3237 process_die (cu
->dies
, cu
);
3239 /* Some compilers don't define a DW_AT_high_pc attribute for the
3240 compilation unit. If the DW_AT_high_pc is missing, synthesize
3241 it, by scanning the DIE's below the compilation unit. */
3242 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3244 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3246 /* Set symtab language to language from DW_AT_language.
3247 If the compilation is from a C file generated by language preprocessors,
3248 do not set the language if it was already deduced by start_subfile. */
3250 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3252 symtab
->language
= cu
->language
;
3254 pst
->symtab
= symtab
;
3257 do_cleanups (back_to
);
3260 /* Process a die and its children. */
3263 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3267 case DW_TAG_padding
:
3269 case DW_TAG_compile_unit
:
3270 read_file_scope (die
, cu
);
3272 case DW_TAG_type_unit
:
3273 read_type_unit_scope (die
, cu
);
3275 case DW_TAG_subprogram
:
3276 case DW_TAG_inlined_subroutine
:
3277 read_func_scope (die
, cu
);
3279 case DW_TAG_lexical_block
:
3280 case DW_TAG_try_block
:
3281 case DW_TAG_catch_block
:
3282 read_lexical_block_scope (die
, cu
);
3284 case DW_TAG_class_type
:
3285 case DW_TAG_interface_type
:
3286 case DW_TAG_structure_type
:
3287 case DW_TAG_union_type
:
3288 process_structure_scope (die
, cu
);
3290 case DW_TAG_enumeration_type
:
3291 process_enumeration_scope (die
, cu
);
3294 /* These dies have a type, but processing them does not create
3295 a symbol or recurse to process the children. Therefore we can
3296 read them on-demand through read_type_die. */
3297 case DW_TAG_subroutine_type
:
3298 case DW_TAG_set_type
:
3299 case DW_TAG_array_type
:
3300 case DW_TAG_pointer_type
:
3301 case DW_TAG_ptr_to_member_type
:
3302 case DW_TAG_reference_type
:
3303 case DW_TAG_string_type
:
3306 case DW_TAG_base_type
:
3307 case DW_TAG_subrange_type
:
3308 case DW_TAG_typedef
:
3309 /* Add a typedef symbol for the type definition, if it has a
3311 new_symbol (die
, read_type_die (die
, cu
), cu
);
3313 case DW_TAG_common_block
:
3314 read_common_block (die
, cu
);
3316 case DW_TAG_common_inclusion
:
3318 case DW_TAG_namespace
:
3319 processing_has_namespace_info
= 1;
3320 read_namespace (die
, cu
);
3323 read_module (die
, cu
);
3325 case DW_TAG_imported_declaration
:
3326 case DW_TAG_imported_module
:
3327 processing_has_namespace_info
= 1;
3328 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3329 || cu
->language
!= language_fortran
))
3330 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3331 dwarf_tag_name (die
->tag
));
3332 read_import_statement (die
, cu
);
3335 new_symbol (die
, NULL
, cu
);
3340 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3341 If scope qualifiers are appropriate they will be added. The result
3342 will be allocated on the objfile_obstack, or NULL if the DIE does
3346 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3348 struct attribute
*attr
;
3349 char *prefix
, *name
;
3350 struct ui_file
*buf
= NULL
;
3352 name
= dwarf2_name (die
, cu
);
3356 /* These are the only languages we know how to qualify names in. */
3357 if (cu
->language
!= language_cplus
3358 && cu
->language
!= language_java
)
3361 /* If no prefix is necessary for this type of DIE, return the
3362 unqualified name. The other three tags listed could be handled
3363 in pdi_needs_namespace, but that requires broader changes. */
3364 if (!pdi_needs_namespace (die
->tag
)
3365 && die
->tag
!= DW_TAG_subprogram
3366 && die
->tag
!= DW_TAG_variable
3367 && die
->tag
!= DW_TAG_member
)
3370 prefix
= determine_prefix (die
, cu
);
3371 if (*prefix
!= '\0')
3372 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3378 /* Read the import statement specified by the given die and record it. */
3381 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3383 struct attribute
*import_attr
;
3384 struct die_info
*imported_die
;
3385 struct dwarf2_cu
*imported_cu
;
3386 const char *imported_name
;
3387 const char *imported_name_prefix
;
3388 const char *import_prefix
;
3389 char *canonical_name
;
3391 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3392 if (import_attr
== NULL
)
3394 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3395 dwarf_tag_name (die
->tag
));
3400 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3401 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3402 if (imported_name
== NULL
)
3404 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3406 The import in the following code:
3420 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3421 <52> DW_AT_decl_file : 1
3422 <53> DW_AT_decl_line : 6
3423 <54> DW_AT_import : <0x75>
3424 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3426 <5b> DW_AT_decl_file : 1
3427 <5c> DW_AT_decl_line : 2
3428 <5d> DW_AT_type : <0x6e>
3430 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3431 <76> DW_AT_byte_size : 4
3432 <77> DW_AT_encoding : 5 (signed)
3434 imports the wrong die ( 0x75 instead of 0x58 ).
3435 This case will be ignored until the gcc bug is fixed. */
3439 /* FIXME: dwarf2_name (die); for the local name after import. */
3441 /* Figure out where the statement is being imported to. */
3442 import_prefix
= determine_prefix (die
, cu
);
3444 /* Figure out what the scope of the imported die is and prepend it
3445 to the name of the imported die. */
3446 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3448 if (strlen (imported_name_prefix
) > 0)
3450 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3451 strcpy (canonical_name
, imported_name_prefix
);
3452 strcat (canonical_name
, "::");
3453 strcat (canonical_name
, imported_name
);
3457 canonical_name
= alloca (strlen (imported_name
) + 1);
3458 strcpy (canonical_name
, imported_name
);
3461 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3465 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3467 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3471 free_cu_line_header (void *arg
)
3473 struct dwarf2_cu
*cu
= arg
;
3475 free_line_header (cu
->line_header
);
3476 cu
->line_header
= NULL
;
3480 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3482 struct objfile
*objfile
= cu
->objfile
;
3483 struct comp_unit_head
*cu_header
= &cu
->header
;
3484 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3485 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3486 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3487 struct attribute
*attr
;
3489 char *comp_dir
= NULL
;
3490 struct die_info
*child_die
;
3491 bfd
*abfd
= objfile
->obfd
;
3492 struct line_header
*line_header
= 0;
3495 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3497 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3499 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3500 from finish_block. */
3501 if (lowpc
== ((CORE_ADDR
) -1))
3506 /* Find the filename. Do not use dwarf2_name here, since the filename
3507 is not a source language identifier. */
3508 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3511 name
= DW_STRING (attr
);
3514 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3516 comp_dir
= DW_STRING (attr
);
3517 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3519 comp_dir
= ldirname (name
);
3520 if (comp_dir
!= NULL
)
3521 make_cleanup (xfree
, comp_dir
);
3523 if (comp_dir
!= NULL
)
3525 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3526 directory, get rid of it. */
3527 char *cp
= strchr (comp_dir
, ':');
3529 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3536 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3539 set_cu_language (DW_UNSND (attr
), cu
);
3542 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3544 cu
->producer
= DW_STRING (attr
);
3546 /* We assume that we're processing GCC output. */
3547 processing_gcc_compilation
= 2;
3549 processing_has_namespace_info
= 0;
3551 start_symtab (name
, comp_dir
, lowpc
);
3552 record_debugformat ("DWARF 2");
3553 record_producer (cu
->producer
);
3555 initialize_cu_func_list (cu
);
3557 /* Decode line number information if present. We do this before
3558 processing child DIEs, so that the line header table is available
3559 for DW_AT_decl_file. */
3560 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3563 unsigned int line_offset
= DW_UNSND (attr
);
3564 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3567 cu
->line_header
= line_header
;
3568 make_cleanup (free_cu_line_header
, cu
);
3569 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3573 /* Process all dies in compilation unit. */
3574 if (die
->child
!= NULL
)
3576 child_die
= die
->child
;
3577 while (child_die
&& child_die
->tag
)
3579 process_die (child_die
, cu
);
3580 child_die
= sibling_die (child_die
);
3584 /* Decode macro information, if present. Dwarf 2 macro information
3585 refers to information in the line number info statement program
3586 header, so we can only read it if we've read the header
3588 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3589 if (attr
&& line_header
)
3591 unsigned int macro_offset
= DW_UNSND (attr
);
3592 dwarf_decode_macros (line_header
, macro_offset
,
3593 comp_dir
, abfd
, cu
);
3595 do_cleanups (back_to
);
3598 /* For TUs we want to skip the first top level sibling if it's not the
3599 actual type being defined by this TU. In this case the first top
3600 level sibling is there to provide context only. */
3603 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3605 struct objfile
*objfile
= cu
->objfile
;
3606 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3608 struct attribute
*attr
;
3610 char *comp_dir
= NULL
;
3611 struct die_info
*child_die
;
3612 bfd
*abfd
= objfile
->obfd
;
3613 struct line_header
*line_header
= 0;
3615 /* start_symtab needs a low pc, but we don't really have one.
3616 Do what read_file_scope would do in the absence of such info. */
3617 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3619 /* Find the filename. Do not use dwarf2_name here, since the filename
3620 is not a source language identifier. */
3621 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3623 name
= DW_STRING (attr
);
3625 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3627 comp_dir
= DW_STRING (attr
);
3628 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3630 comp_dir
= ldirname (name
);
3631 if (comp_dir
!= NULL
)
3632 make_cleanup (xfree
, comp_dir
);
3638 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3640 set_cu_language (DW_UNSND (attr
), cu
);
3642 /* This isn't technically needed today. It is done for symmetry
3643 with read_file_scope. */
3644 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3646 cu
->producer
= DW_STRING (attr
);
3648 /* We assume that we're processing GCC output. */
3649 processing_gcc_compilation
= 2;
3651 processing_has_namespace_info
= 0;
3653 start_symtab (name
, comp_dir
, lowpc
);
3654 record_debugformat ("DWARF 2");
3655 record_producer (cu
->producer
);
3657 /* Process the dies in the type unit. */
3658 if (die
->child
== NULL
)
3660 dump_die_for_error (die
);
3661 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3662 bfd_get_filename (abfd
));
3665 child_die
= die
->child
;
3667 while (child_die
&& child_die
->tag
)
3669 process_die (child_die
, cu
);
3671 child_die
= sibling_die (child_die
);
3674 do_cleanups (back_to
);
3678 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3679 struct dwarf2_cu
*cu
)
3681 struct function_range
*thisfn
;
3683 thisfn
= (struct function_range
*)
3684 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3685 thisfn
->name
= name
;
3686 thisfn
->lowpc
= lowpc
;
3687 thisfn
->highpc
= highpc
;
3688 thisfn
->seen_line
= 0;
3689 thisfn
->next
= NULL
;
3691 if (cu
->last_fn
== NULL
)
3692 cu
->first_fn
= thisfn
;
3694 cu
->last_fn
->next
= thisfn
;
3696 cu
->last_fn
= thisfn
;
3699 /* qsort helper for inherit_abstract_dies. */
3702 unsigned_int_compar (const void *ap
, const void *bp
)
3704 unsigned int a
= *(unsigned int *) ap
;
3705 unsigned int b
= *(unsigned int *) bp
;
3707 return (a
> b
) - (b
> a
);
3710 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3711 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3712 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3715 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3717 struct die_info
*child_die
;
3718 unsigned die_children_count
;
3719 /* CU offsets which were referenced by children of the current DIE. */
3721 unsigned *offsets_end
, *offsetp
;
3722 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3723 struct die_info
*origin_die
;
3724 /* Iterator of the ORIGIN_DIE children. */
3725 struct die_info
*origin_child_die
;
3726 struct cleanup
*cleanups
;
3727 struct attribute
*attr
;
3729 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3733 origin_die
= follow_die_ref (die
, attr
, &cu
);
3734 if (die
->tag
!= origin_die
->tag
3735 && !(die
->tag
== DW_TAG_inlined_subroutine
3736 && origin_die
->tag
== DW_TAG_subprogram
))
3737 complaint (&symfile_complaints
,
3738 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3739 die
->offset
, origin_die
->offset
);
3741 child_die
= die
->child
;
3742 die_children_count
= 0;
3743 while (child_die
&& child_die
->tag
)
3745 child_die
= sibling_die (child_die
);
3746 die_children_count
++;
3748 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3749 cleanups
= make_cleanup (xfree
, offsets
);
3751 offsets_end
= offsets
;
3752 child_die
= die
->child
;
3753 while (child_die
&& child_die
->tag
)
3755 /* For each CHILD_DIE, find the corresponding child of
3756 ORIGIN_DIE. If there is more than one layer of
3757 DW_AT_abstract_origin, follow them all; there shouldn't be,
3758 but GCC versions at least through 4.4 generate this (GCC PR
3760 struct die_info
*child_origin_die
= child_die
;
3763 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3766 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3769 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3770 counterpart may exist. */
3771 if (child_origin_die
!= child_die
)
3773 if (child_die
->tag
!= child_origin_die
->tag
3774 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3775 && child_origin_die
->tag
== DW_TAG_subprogram
))
3776 complaint (&symfile_complaints
,
3777 _("Child DIE 0x%x and its abstract origin 0x%x have "
3778 "different tags"), child_die
->offset
,
3779 child_origin_die
->offset
);
3780 if (child_origin_die
->parent
!= origin_die
)
3781 complaint (&symfile_complaints
,
3782 _("Child DIE 0x%x and its abstract origin 0x%x have "
3783 "different parents"), child_die
->offset
,
3784 child_origin_die
->offset
);
3786 *offsets_end
++ = child_origin_die
->offset
;
3788 child_die
= sibling_die (child_die
);
3790 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3791 unsigned_int_compar
);
3792 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3793 if (offsetp
[-1] == *offsetp
)
3794 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3795 "to DIE 0x%x as their abstract origin"),
3796 die
->offset
, *offsetp
);
3799 origin_child_die
= origin_die
->child
;
3800 while (origin_child_die
&& origin_child_die
->tag
)
3802 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3803 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3805 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3807 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3808 process_die (origin_child_die
, cu
);
3810 origin_child_die
= sibling_die (origin_child_die
);
3813 do_cleanups (cleanups
);
3817 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3819 struct objfile
*objfile
= cu
->objfile
;
3820 struct context_stack
*new;
3823 struct die_info
*child_die
;
3824 struct attribute
*attr
, *call_line
, *call_file
;
3827 struct block
*block
;
3828 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3832 /* If we do not have call site information, we can't show the
3833 caller of this inlined function. That's too confusing, so
3834 only use the scope for local variables. */
3835 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3836 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3837 if (call_line
== NULL
|| call_file
== NULL
)
3839 read_lexical_block_scope (die
, cu
);
3844 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3846 name
= dwarf2_linkage_name (die
, cu
);
3848 /* Ignore functions with missing or empty names and functions with
3849 missing or invalid low and high pc attributes. */
3850 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3856 /* Record the function range for dwarf_decode_lines. */
3857 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3859 new = push_context (0, lowpc
);
3860 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3862 /* If there is a location expression for DW_AT_frame_base, record
3864 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3866 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3867 expression is being recorded directly in the function's symbol
3868 and not in a separate frame-base object. I guess this hack is
3869 to avoid adding some sort of frame-base adjunct/annex to the
3870 function's symbol :-(. The problem with doing this is that it
3871 results in a function symbol with a location expression that
3872 has nothing to do with the location of the function, ouch! The
3873 relationship should be: a function's symbol has-a frame base; a
3874 frame-base has-a location expression. */
3875 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3877 cu
->list_in_scope
= &local_symbols
;
3879 if (die
->child
!= NULL
)
3881 child_die
= die
->child
;
3882 while (child_die
&& child_die
->tag
)
3884 process_die (child_die
, cu
);
3885 child_die
= sibling_die (child_die
);
3889 inherit_abstract_dies (die
, cu
);
3891 new = pop_context ();
3892 /* Make a block for the local symbols within. */
3893 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3894 lowpc
, highpc
, objfile
);
3896 /* For C++, set the block's scope. */
3897 if (cu
->language
== language_cplus
)
3898 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3899 determine_prefix (die
, cu
),
3900 processing_has_namespace_info
);
3902 /* If we have address ranges, record them. */
3903 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3905 /* In C++, we can have functions nested inside functions (e.g., when
3906 a function declares a class that has methods). This means that
3907 when we finish processing a function scope, we may need to go
3908 back to building a containing block's symbol lists. */
3909 local_symbols
= new->locals
;
3910 param_symbols
= new->params
;
3911 using_directives
= new->using_directives
;
3913 /* If we've finished processing a top-level function, subsequent
3914 symbols go in the file symbol list. */
3915 if (outermost_context_p ())
3916 cu
->list_in_scope
= &file_symbols
;
3919 /* Process all the DIES contained within a lexical block scope. Start
3920 a new scope, process the dies, and then close the scope. */
3923 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3925 struct objfile
*objfile
= cu
->objfile
;
3926 struct context_stack
*new;
3927 CORE_ADDR lowpc
, highpc
;
3928 struct die_info
*child_die
;
3931 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3933 /* Ignore blocks with missing or invalid low and high pc attributes. */
3934 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3935 as multiple lexical blocks? Handling children in a sane way would
3936 be nasty. Might be easier to properly extend generic blocks to
3938 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3943 push_context (0, lowpc
);
3944 if (die
->child
!= NULL
)
3946 child_die
= die
->child
;
3947 while (child_die
&& child_die
->tag
)
3949 process_die (child_die
, cu
);
3950 child_die
= sibling_die (child_die
);
3953 new = pop_context ();
3955 if (local_symbols
!= NULL
)
3958 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3961 /* Note that recording ranges after traversing children, as we
3962 do here, means that recording a parent's ranges entails
3963 walking across all its children's ranges as they appear in
3964 the address map, which is quadratic behavior.
3966 It would be nicer to record the parent's ranges before
3967 traversing its children, simply overriding whatever you find
3968 there. But since we don't even decide whether to create a
3969 block until after we've traversed its children, that's hard
3971 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3973 local_symbols
= new->locals
;
3974 using_directives
= new->using_directives
;
3977 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3978 Return 1 if the attributes are present and valid, otherwise, return 0.
3979 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3982 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3983 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3984 struct partial_symtab
*ranges_pst
)
3986 struct objfile
*objfile
= cu
->objfile
;
3987 struct comp_unit_head
*cu_header
= &cu
->header
;
3988 bfd
*obfd
= objfile
->obfd
;
3989 unsigned int addr_size
= cu_header
->addr_size
;
3990 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3991 /* Base address selection entry. */
4002 found_base
= cu
->base_known
;
4003 base
= cu
->base_address
;
4005 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4007 complaint (&symfile_complaints
,
4008 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4012 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4014 /* Read in the largest possible address. */
4015 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4016 if ((marker
& mask
) == mask
)
4018 /* If we found the largest possible address, then
4019 read the base address. */
4020 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4021 buffer
+= 2 * addr_size
;
4022 offset
+= 2 * addr_size
;
4028 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4032 CORE_ADDR range_beginning
, range_end
;
4034 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4035 buffer
+= addr_size
;
4036 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4037 buffer
+= addr_size
;
4038 offset
+= 2 * addr_size
;
4040 /* An end of list marker is a pair of zero addresses. */
4041 if (range_beginning
== 0 && range_end
== 0)
4042 /* Found the end of list entry. */
4045 /* Each base address selection entry is a pair of 2 values.
4046 The first is the largest possible address, the second is
4047 the base address. Check for a base address here. */
4048 if ((range_beginning
& mask
) == mask
)
4050 /* If we found the largest possible address, then
4051 read the base address. */
4052 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4059 /* We have no valid base address for the ranges
4061 complaint (&symfile_complaints
,
4062 _("Invalid .debug_ranges data (no base address)"));
4066 range_beginning
+= base
;
4069 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4070 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4071 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4074 /* FIXME: This is recording everything as a low-high
4075 segment of consecutive addresses. We should have a
4076 data structure for discontiguous block ranges
4080 low
= range_beginning
;
4086 if (range_beginning
< low
)
4087 low
= range_beginning
;
4088 if (range_end
> high
)
4094 /* If the first entry is an end-of-list marker, the range
4095 describes an empty scope, i.e. no instructions. */
4101 *high_return
= high
;
4105 /* Get low and high pc attributes from a die. Return 1 if the attributes
4106 are present and valid, otherwise, return 0. Return -1 if the range is
4107 discontinuous, i.e. derived from DW_AT_ranges information. */
4109 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4110 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4111 struct partial_symtab
*pst
)
4113 struct attribute
*attr
;
4118 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4121 high
= DW_ADDR (attr
);
4122 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4124 low
= DW_ADDR (attr
);
4126 /* Found high w/o low attribute. */
4129 /* Found consecutive range of addresses. */
4134 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4137 /* Value of the DW_AT_ranges attribute is the offset in the
4138 .debug_ranges section. */
4139 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4141 /* Found discontinuous range of addresses. */
4149 /* When using the GNU linker, .gnu.linkonce. sections are used to
4150 eliminate duplicate copies of functions and vtables and such.
4151 The linker will arbitrarily choose one and discard the others.
4152 The AT_*_pc values for such functions refer to local labels in
4153 these sections. If the section from that file was discarded, the
4154 labels are not in the output, so the relocs get a value of 0.
4155 If this is a discarded function, mark the pc bounds as invalid,
4156 so that GDB will ignore it. */
4157 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4165 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4166 its low and high PC addresses. Do nothing if these addresses could not
4167 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4168 and HIGHPC to the high address if greater than HIGHPC. */
4171 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4172 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4173 struct dwarf2_cu
*cu
)
4175 CORE_ADDR low
, high
;
4176 struct die_info
*child
= die
->child
;
4178 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4180 *lowpc
= min (*lowpc
, low
);
4181 *highpc
= max (*highpc
, high
);
4184 /* If the language does not allow nested subprograms (either inside
4185 subprograms or lexical blocks), we're done. */
4186 if (cu
->language
!= language_ada
)
4189 /* Check all the children of the given DIE. If it contains nested
4190 subprograms, then check their pc bounds. Likewise, we need to
4191 check lexical blocks as well, as they may also contain subprogram
4193 while (child
&& child
->tag
)
4195 if (child
->tag
== DW_TAG_subprogram
4196 || child
->tag
== DW_TAG_lexical_block
)
4197 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4198 child
= sibling_die (child
);
4202 /* Get the low and high pc's represented by the scope DIE, and store
4203 them in *LOWPC and *HIGHPC. If the correct values can't be
4204 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4207 get_scope_pc_bounds (struct die_info
*die
,
4208 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4209 struct dwarf2_cu
*cu
)
4211 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4212 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4213 CORE_ADDR current_low
, current_high
;
4215 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4217 best_low
= current_low
;
4218 best_high
= current_high
;
4222 struct die_info
*child
= die
->child
;
4224 while (child
&& child
->tag
)
4226 switch (child
->tag
) {
4227 case DW_TAG_subprogram
:
4228 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4230 case DW_TAG_namespace
:
4231 /* FIXME: carlton/2004-01-16: Should we do this for
4232 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4233 that current GCC's always emit the DIEs corresponding
4234 to definitions of methods of classes as children of a
4235 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4236 the DIEs giving the declarations, which could be
4237 anywhere). But I don't see any reason why the
4238 standards says that they have to be there. */
4239 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4241 if (current_low
!= ((CORE_ADDR
) -1))
4243 best_low
= min (best_low
, current_low
);
4244 best_high
= max (best_high
, current_high
);
4252 child
= sibling_die (child
);
4257 *highpc
= best_high
;
4260 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4263 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4264 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4266 struct attribute
*attr
;
4268 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4271 CORE_ADDR high
= DW_ADDR (attr
);
4272 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4275 CORE_ADDR low
= DW_ADDR (attr
);
4276 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4280 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4283 bfd
*obfd
= cu
->objfile
->obfd
;
4285 /* The value of the DW_AT_ranges attribute is the offset of the
4286 address range list in the .debug_ranges section. */
4287 unsigned long offset
= DW_UNSND (attr
);
4288 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4290 /* For some target architectures, but not others, the
4291 read_address function sign-extends the addresses it returns.
4292 To recognize base address selection entries, we need a
4294 unsigned int addr_size
= cu
->header
.addr_size
;
4295 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4297 /* The base address, to which the next pair is relative. Note
4298 that this 'base' is a DWARF concept: most entries in a range
4299 list are relative, to reduce the number of relocs against the
4300 debugging information. This is separate from this function's
4301 'baseaddr' argument, which GDB uses to relocate debugging
4302 information from a shared library based on the address at
4303 which the library was loaded. */
4304 CORE_ADDR base
= cu
->base_address
;
4305 int base_known
= cu
->base_known
;
4307 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4309 complaint (&symfile_complaints
,
4310 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4317 unsigned int bytes_read
;
4318 CORE_ADDR start
, end
;
4320 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4321 buffer
+= bytes_read
;
4322 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4323 buffer
+= bytes_read
;
4325 /* Did we find the end of the range list? */
4326 if (start
== 0 && end
== 0)
4329 /* Did we find a base address selection entry? */
4330 else if ((start
& base_select_mask
) == base_select_mask
)
4336 /* We found an ordinary address range. */
4341 complaint (&symfile_complaints
,
4342 _("Invalid .debug_ranges data (no base address)"));
4346 record_block_range (block
,
4347 baseaddr
+ base
+ start
,
4348 baseaddr
+ base
+ end
- 1);
4354 /* Add an aggregate field to the field list. */
4357 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4358 struct dwarf2_cu
*cu
)
4360 struct objfile
*objfile
= cu
->objfile
;
4361 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4362 struct nextfield
*new_field
;
4363 struct attribute
*attr
;
4365 char *fieldname
= "";
4367 /* Allocate a new field list entry and link it in. */
4368 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4369 make_cleanup (xfree
, new_field
);
4370 memset (new_field
, 0, sizeof (struct nextfield
));
4372 if (die
->tag
== DW_TAG_inheritance
)
4374 new_field
->next
= fip
->baseclasses
;
4375 fip
->baseclasses
= new_field
;
4379 new_field
->next
= fip
->fields
;
4380 fip
->fields
= new_field
;
4384 /* Handle accessibility and virtuality of field.
4385 The default accessibility for members is public, the default
4386 accessibility for inheritance is private. */
4387 if (die
->tag
!= DW_TAG_inheritance
)
4388 new_field
->accessibility
= DW_ACCESS_public
;
4390 new_field
->accessibility
= DW_ACCESS_private
;
4391 new_field
->virtuality
= DW_VIRTUALITY_none
;
4393 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4395 new_field
->accessibility
= DW_UNSND (attr
);
4396 if (new_field
->accessibility
!= DW_ACCESS_public
)
4397 fip
->non_public_fields
= 1;
4398 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4400 new_field
->virtuality
= DW_UNSND (attr
);
4402 fp
= &new_field
->field
;
4404 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4406 /* Data member other than a C++ static data member. */
4408 /* Get type of field. */
4409 fp
->type
= die_type (die
, cu
);
4411 SET_FIELD_BITPOS (*fp
, 0);
4413 /* Get bit size of field (zero if none). */
4414 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4417 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4421 FIELD_BITSIZE (*fp
) = 0;
4424 /* Get bit offset of field. */
4425 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4428 int byte_offset
= 0;
4430 if (attr_form_is_section_offset (attr
))
4431 dwarf2_complex_location_expr_complaint ();
4432 else if (attr_form_is_constant (attr
))
4433 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4434 else if (attr_form_is_block (attr
))
4435 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4437 dwarf2_complex_location_expr_complaint ();
4439 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4441 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4444 if (gdbarch_bits_big_endian (gdbarch
))
4446 /* For big endian bits, the DW_AT_bit_offset gives the
4447 additional bit offset from the MSB of the containing
4448 anonymous object to the MSB of the field. We don't
4449 have to do anything special since we don't need to
4450 know the size of the anonymous object. */
4451 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4455 /* For little endian bits, compute the bit offset to the
4456 MSB of the anonymous object, subtract off the number of
4457 bits from the MSB of the field to the MSB of the
4458 object, and then subtract off the number of bits of
4459 the field itself. The result is the bit offset of
4460 the LSB of the field. */
4462 int bit_offset
= DW_UNSND (attr
);
4464 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4467 /* The size of the anonymous object containing
4468 the bit field is explicit, so use the
4469 indicated size (in bytes). */
4470 anonymous_size
= DW_UNSND (attr
);
4474 /* The size of the anonymous object containing
4475 the bit field must be inferred from the type
4476 attribute of the data member containing the
4478 anonymous_size
= TYPE_LENGTH (fp
->type
);
4480 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4481 - bit_offset
- FIELD_BITSIZE (*fp
);
4485 /* Get name of field. */
4486 fieldname
= dwarf2_name (die
, cu
);
4487 if (fieldname
== NULL
)
4490 /* The name is already allocated along with this objfile, so we don't
4491 need to duplicate it for the type. */
4492 fp
->name
= fieldname
;
4494 /* Change accessibility for artificial fields (e.g. virtual table
4495 pointer or virtual base class pointer) to private. */
4496 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4498 FIELD_ARTIFICIAL (*fp
) = 1;
4499 new_field
->accessibility
= DW_ACCESS_private
;
4500 fip
->non_public_fields
= 1;
4503 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4505 /* C++ static member. */
4507 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4508 is a declaration, but all versions of G++ as of this writing
4509 (so through at least 3.2.1) incorrectly generate
4510 DW_TAG_variable tags. */
4514 /* Get name of field. */
4515 fieldname
= dwarf2_name (die
, cu
);
4516 if (fieldname
== NULL
)
4519 /* Get physical name. */
4520 physname
= dwarf2_linkage_name (die
, cu
);
4522 /* The name is already allocated along with this objfile, so we don't
4523 need to duplicate it for the type. */
4524 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4525 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4526 FIELD_NAME (*fp
) = fieldname
;
4528 else if (die
->tag
== DW_TAG_inheritance
)
4530 /* C++ base class field. */
4531 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4534 int byte_offset
= 0;
4536 if (attr_form_is_section_offset (attr
))
4537 dwarf2_complex_location_expr_complaint ();
4538 else if (attr_form_is_constant (attr
))
4539 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4540 else if (attr_form_is_block (attr
))
4541 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4543 dwarf2_complex_location_expr_complaint ();
4545 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4547 FIELD_BITSIZE (*fp
) = 0;
4548 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4549 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4550 fip
->nbaseclasses
++;
4554 /* Create the vector of fields, and attach it to the type. */
4557 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4558 struct dwarf2_cu
*cu
)
4560 int nfields
= fip
->nfields
;
4562 /* Record the field count, allocate space for the array of fields,
4563 and create blank accessibility bitfields if necessary. */
4564 TYPE_NFIELDS (type
) = nfields
;
4565 TYPE_FIELDS (type
) = (struct field
*)
4566 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4567 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4569 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4571 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4573 TYPE_FIELD_PRIVATE_BITS (type
) =
4574 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4575 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4577 TYPE_FIELD_PROTECTED_BITS (type
) =
4578 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4579 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4581 TYPE_FIELD_IGNORE_BITS (type
) =
4582 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4583 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4586 /* If the type has baseclasses, allocate and clear a bit vector for
4587 TYPE_FIELD_VIRTUAL_BITS. */
4588 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4590 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4591 unsigned char *pointer
;
4593 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4594 pointer
= TYPE_ALLOC (type
, num_bytes
);
4595 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4596 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4597 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4600 /* Copy the saved-up fields into the field vector. Start from the head
4601 of the list, adding to the tail of the field array, so that they end
4602 up in the same order in the array in which they were added to the list. */
4603 while (nfields
-- > 0)
4605 struct nextfield
*fieldp
;
4609 fieldp
= fip
->fields
;
4610 fip
->fields
= fieldp
->next
;
4614 fieldp
= fip
->baseclasses
;
4615 fip
->baseclasses
= fieldp
->next
;
4618 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4619 switch (fieldp
->accessibility
)
4621 case DW_ACCESS_private
:
4622 if (cu
->language
!= language_ada
)
4623 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4626 case DW_ACCESS_protected
:
4627 if (cu
->language
!= language_ada
)
4628 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4631 case DW_ACCESS_public
:
4635 /* Unknown accessibility. Complain and treat it as public. */
4637 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4638 fieldp
->accessibility
);
4642 if (nfields
< fip
->nbaseclasses
)
4644 switch (fieldp
->virtuality
)
4646 case DW_VIRTUALITY_virtual
:
4647 case DW_VIRTUALITY_pure_virtual
:
4648 if (cu
->language
== language_ada
)
4649 error ("unexpected virtuality in component of Ada type");
4650 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4657 /* Add a member function to the proper fieldlist. */
4660 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4661 struct type
*type
, struct dwarf2_cu
*cu
)
4663 struct objfile
*objfile
= cu
->objfile
;
4664 struct attribute
*attr
;
4665 struct fnfieldlist
*flp
;
4667 struct fn_field
*fnp
;
4670 struct nextfnfield
*new_fnfield
;
4671 struct type
*this_type
;
4673 if (cu
->language
== language_ada
)
4674 error ("unexpected member function in Ada type");
4676 /* Get name of member function. */
4677 fieldname
= dwarf2_name (die
, cu
);
4678 if (fieldname
== NULL
)
4681 /* Get the mangled name. */
4682 physname
= dwarf2_linkage_name (die
, cu
);
4684 /* Look up member function name in fieldlist. */
4685 for (i
= 0; i
< fip
->nfnfields
; i
++)
4687 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4691 /* Create new list element if necessary. */
4692 if (i
< fip
->nfnfields
)
4693 flp
= &fip
->fnfieldlists
[i
];
4696 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4698 fip
->fnfieldlists
= (struct fnfieldlist
*)
4699 xrealloc (fip
->fnfieldlists
,
4700 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4701 * sizeof (struct fnfieldlist
));
4702 if (fip
->nfnfields
== 0)
4703 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4705 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4706 flp
->name
= fieldname
;
4712 /* Create a new member function field and chain it to the field list
4714 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4715 make_cleanup (xfree
, new_fnfield
);
4716 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4717 new_fnfield
->next
= flp
->head
;
4718 flp
->head
= new_fnfield
;
4721 /* Fill in the member function field info. */
4722 fnp
= &new_fnfield
->fnfield
;
4723 /* The name is already allocated along with this objfile, so we don't
4724 need to duplicate it for the type. */
4725 fnp
->physname
= physname
? physname
: "";
4726 fnp
->type
= alloc_type (objfile
);
4727 this_type
= read_type_die (die
, cu
);
4728 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4730 int nparams
= TYPE_NFIELDS (this_type
);
4732 /* TYPE is the domain of this method, and THIS_TYPE is the type
4733 of the method itself (TYPE_CODE_METHOD). */
4734 smash_to_method_type (fnp
->type
, type
,
4735 TYPE_TARGET_TYPE (this_type
),
4736 TYPE_FIELDS (this_type
),
4737 TYPE_NFIELDS (this_type
),
4738 TYPE_VARARGS (this_type
));
4740 /* Handle static member functions.
4741 Dwarf2 has no clean way to discern C++ static and non-static
4742 member functions. G++ helps GDB by marking the first
4743 parameter for non-static member functions (which is the
4744 this pointer) as artificial. We obtain this information
4745 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4746 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4747 fnp
->voffset
= VOFFSET_STATIC
;
4750 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4753 /* Get fcontext from DW_AT_containing_type if present. */
4754 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4755 fnp
->fcontext
= die_containing_type (die
, cu
);
4757 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4758 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4760 /* Get accessibility. */
4761 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4764 switch (DW_UNSND (attr
))
4766 case DW_ACCESS_private
:
4767 fnp
->is_private
= 1;
4769 case DW_ACCESS_protected
:
4770 fnp
->is_protected
= 1;
4775 /* Check for artificial methods. */
4776 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4777 if (attr
&& DW_UNSND (attr
) != 0)
4778 fnp
->is_artificial
= 1;
4780 /* Get index in virtual function table if it is a virtual member
4781 function. For GCC, this is an offset in the appropriate
4782 virtual table, as specified by DW_AT_containing_type. For
4783 everyone else, it is an expression to be evaluated relative
4784 to the object address. */
4786 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4787 if (attr
&& fnp
->fcontext
)
4789 /* Support the .debug_loc offsets */
4790 if (attr_form_is_block (attr
))
4792 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4794 else if (attr_form_is_section_offset (attr
))
4796 dwarf2_complex_location_expr_complaint ();
4800 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4806 /* We only support trivial expressions here. This hack will work
4807 for v3 classes, which always start with the vtable pointer. */
4808 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4809 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4811 struct dwarf_block blk
;
4812 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4813 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4814 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4815 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4816 dwarf2_complex_location_expr_complaint ();
4818 fnp
->voffset
/= cu
->header
.addr_size
;
4820 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4823 dwarf2_complex_location_expr_complaint ();
4827 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4828 if (attr
&& DW_UNSND (attr
))
4830 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4831 complaint (&symfile_complaints
,
4832 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4833 fieldname
, die
->offset
);
4834 TYPE_CPLUS_DYNAMIC (type
) = 1;
4839 /* Create the vector of member function fields, and attach it to the type. */
4842 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4843 struct dwarf2_cu
*cu
)
4845 struct fnfieldlist
*flp
;
4846 int total_length
= 0;
4849 if (cu
->language
== language_ada
)
4850 error ("unexpected member functions in Ada type");
4852 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4853 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4854 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4856 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4858 struct nextfnfield
*nfp
= flp
->head
;
4859 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4862 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4863 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4864 fn_flp
->fn_fields
= (struct fn_field
*)
4865 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4866 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4867 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4869 total_length
+= flp
->length
;
4872 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4873 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4876 /* Returns non-zero if NAME is the name of a vtable member in CU's
4877 language, zero otherwise. */
4879 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4881 static const char vptr
[] = "_vptr";
4882 static const char vtable
[] = "vtable";
4884 /* Look for the C++ and Java forms of the vtable. */
4885 if ((cu
->language
== language_java
4886 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4887 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4888 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4894 /* GCC outputs unnamed structures that are really pointers to member
4895 functions, with the ABI-specified layout. If TYPE describes
4896 such a structure, smash it into a member function type.
4898 GCC shouldn't do this; it should just output pointer to member DIEs.
4899 This is GCC PR debug/28767. */
4902 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
4904 struct type
*pfn_type
, *domain_type
, *new_type
;
4906 /* Check for a structure with no name and two children. */
4907 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
4910 /* Check for __pfn and __delta members. */
4911 if (TYPE_FIELD_NAME (type
, 0) == NULL
4912 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
4913 || TYPE_FIELD_NAME (type
, 1) == NULL
4914 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
4917 /* Find the type of the method. */
4918 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
4919 if (pfn_type
== NULL
4920 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4921 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4924 /* Look for the "this" argument. */
4925 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4926 if (TYPE_NFIELDS (pfn_type
) == 0
4927 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
4928 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4931 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4932 new_type
= alloc_type (objfile
);
4933 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4934 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4935 TYPE_VARARGS (pfn_type
));
4936 smash_to_methodptr_type (type
, new_type
);
4939 /* Called when we find the DIE that starts a structure or union scope
4940 (definition) to process all dies that define the members of the
4943 NOTE: we need to call struct_type regardless of whether or not the
4944 DIE has an at_name attribute, since it might be an anonymous
4945 structure or union. This gets the type entered into our set of
4948 However, if the structure is incomplete (an opaque struct/union)
4949 then suppress creating a symbol table entry for it since gdb only
4950 wants to find the one with the complete definition. Note that if
4951 it is complete, we just call new_symbol, which does it's own
4952 checking about whether the struct/union is anonymous or not (and
4953 suppresses creating a symbol table entry itself). */
4955 static struct type
*
4956 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4958 struct objfile
*objfile
= cu
->objfile
;
4960 struct attribute
*attr
;
4962 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4964 /* If the definition of this type lives in .debug_types, read that type.
4965 Don't follow DW_AT_specification though, that will take us back up
4966 the chain and we want to go down. */
4967 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4970 struct dwarf2_cu
*type_cu
= cu
;
4971 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4972 /* We could just recurse on read_structure_type, but we need to call
4973 get_die_type to ensure only one type for this DIE is created.
4974 This is important, for example, because for c++ classes we need
4975 TYPE_NAME set which is only done by new_symbol. Blech. */
4976 type
= read_type_die (type_die
, type_cu
);
4977 return set_die_type (die
, type
, cu
);
4980 type
= alloc_type (objfile
);
4981 INIT_CPLUS_SPECIFIC (type
);
4983 name
= dwarf2_name (die
, cu
);
4986 if (cu
->language
== language_cplus
4987 || cu
->language
== language_java
)
4989 const char *new_prefix
= determine_class_name (die
, cu
);
4990 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4994 /* The name is already allocated along with this objfile, so
4995 we don't need to duplicate it for the type. */
4996 TYPE_TAG_NAME (type
) = name
;
5000 if (die
->tag
== DW_TAG_structure_type
)
5002 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5004 else if (die
->tag
== DW_TAG_union_type
)
5006 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5010 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5012 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5015 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5018 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5022 TYPE_LENGTH (type
) = 0;
5025 TYPE_STUB_SUPPORTED (type
) = 1;
5026 if (die_is_declaration (die
, cu
))
5027 TYPE_STUB (type
) = 1;
5029 set_descriptive_type (type
, die
, cu
);
5031 /* We need to add the type field to the die immediately so we don't
5032 infinitely recurse when dealing with pointers to the structure
5033 type within the structure itself. */
5034 set_die_type (die
, type
, cu
);
5036 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5038 struct field_info fi
;
5039 struct die_info
*child_die
;
5041 memset (&fi
, 0, sizeof (struct field_info
));
5043 child_die
= die
->child
;
5045 while (child_die
&& child_die
->tag
)
5047 if (child_die
->tag
== DW_TAG_member
5048 || child_die
->tag
== DW_TAG_variable
)
5050 /* NOTE: carlton/2002-11-05: A C++ static data member
5051 should be a DW_TAG_member that is a declaration, but
5052 all versions of G++ as of this writing (so through at
5053 least 3.2.1) incorrectly generate DW_TAG_variable
5054 tags for them instead. */
5055 dwarf2_add_field (&fi
, child_die
, cu
);
5057 else if (child_die
->tag
== DW_TAG_subprogram
)
5059 /* C++ member function. */
5060 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5062 else if (child_die
->tag
== DW_TAG_inheritance
)
5064 /* C++ base class field. */
5065 dwarf2_add_field (&fi
, child_die
, cu
);
5067 child_die
= sibling_die (child_die
);
5070 /* Attach fields and member functions to the type. */
5072 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5075 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5077 /* Get the type which refers to the base class (possibly this
5078 class itself) which contains the vtable pointer for the current
5079 class from the DW_AT_containing_type attribute. This use of
5080 DW_AT_containing_type is a GNU extension. */
5082 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5084 struct type
*t
= die_containing_type (die
, cu
);
5086 TYPE_VPTR_BASETYPE (type
) = t
;
5091 /* Our own class provides vtbl ptr. */
5092 for (i
= TYPE_NFIELDS (t
) - 1;
5093 i
>= TYPE_N_BASECLASSES (t
);
5096 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5098 if (is_vtable_name (fieldname
, cu
))
5100 TYPE_VPTR_FIELDNO (type
) = i
;
5105 /* Complain if virtual function table field not found. */
5106 if (i
< TYPE_N_BASECLASSES (t
))
5107 complaint (&symfile_complaints
,
5108 _("virtual function table pointer not found when defining class '%s'"),
5109 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5114 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5117 else if (cu
->producer
5118 && strncmp (cu
->producer
,
5119 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5121 /* The IBM XLC compiler does not provide direct indication
5122 of the containing type, but the vtable pointer is
5123 always named __vfp. */
5127 for (i
= TYPE_NFIELDS (type
) - 1;
5128 i
>= TYPE_N_BASECLASSES (type
);
5131 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5133 TYPE_VPTR_FIELDNO (type
) = i
;
5134 TYPE_VPTR_BASETYPE (type
) = type
;
5142 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5144 do_cleanups (back_to
);
5149 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5151 struct objfile
*objfile
= cu
->objfile
;
5152 struct die_info
*child_die
= die
->child
;
5153 struct type
*this_type
;
5155 this_type
= get_die_type (die
, cu
);
5156 if (this_type
== NULL
)
5157 this_type
= read_structure_type (die
, cu
);
5159 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5160 snapshots) has been known to create a die giving a declaration
5161 for a class that has, as a child, a die giving a definition for a
5162 nested class. So we have to process our children even if the
5163 current die is a declaration. Normally, of course, a declaration
5164 won't have any children at all. */
5166 while (child_die
!= NULL
&& child_die
->tag
)
5168 if (child_die
->tag
== DW_TAG_member
5169 || child_die
->tag
== DW_TAG_variable
5170 || child_die
->tag
== DW_TAG_inheritance
)
5175 process_die (child_die
, cu
);
5177 child_die
= sibling_die (child_die
);
5180 /* Do not consider external references. According to the DWARF standard,
5181 these DIEs are identified by the fact that they have no byte_size
5182 attribute, and a declaration attribute. */
5183 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5184 || !die_is_declaration (die
, cu
))
5185 new_symbol (die
, this_type
, cu
);
5188 /* Given a DW_AT_enumeration_type die, set its type. We do not
5189 complete the type's fields yet, or create any symbols. */
5191 static struct type
*
5192 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5194 struct objfile
*objfile
= cu
->objfile
;
5196 struct attribute
*attr
;
5199 /* If the definition of this type lives in .debug_types, read that type.
5200 Don't follow DW_AT_specification though, that will take us back up
5201 the chain and we want to go down. */
5202 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5205 struct dwarf2_cu
*type_cu
= cu
;
5206 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5207 type
= read_type_die (type_die
, type_cu
);
5208 return set_die_type (die
, type
, cu
);
5211 type
= alloc_type (objfile
);
5213 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5214 name
= dwarf2_full_name (die
, cu
);
5216 TYPE_TAG_NAME (type
) = (char *) name
;
5218 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5221 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5225 TYPE_LENGTH (type
) = 0;
5228 /* The enumeration DIE can be incomplete. In Ada, any type can be
5229 declared as private in the package spec, and then defined only
5230 inside the package body. Such types are known as Taft Amendment
5231 Types. When another package uses such a type, an incomplete DIE
5232 may be generated by the compiler. */
5233 if (die_is_declaration (die
, cu
))
5234 TYPE_STUB (type
) = 1;
5236 return set_die_type (die
, type
, cu
);
5239 /* Determine the name of the type represented by DIE, which should be
5240 a named C++ or Java compound type. Return the name in question,
5241 allocated on the objfile obstack. */
5244 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5246 const char *new_prefix
= NULL
;
5248 /* If we don't have namespace debug info, guess the name by trying
5249 to demangle the names of members, just like we did in
5250 guess_structure_name. */
5251 if (!processing_has_namespace_info
)
5253 struct die_info
*child
;
5255 for (child
= die
->child
;
5256 child
!= NULL
&& child
->tag
!= 0;
5257 child
= sibling_die (child
))
5259 if (child
->tag
== DW_TAG_subprogram
)
5262 = language_class_name_from_physname (cu
->language_defn
,
5266 if (phys_prefix
!= NULL
)
5269 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5270 &cu
->objfile
->objfile_obstack
);
5271 xfree (phys_prefix
);
5278 if (new_prefix
== NULL
)
5279 new_prefix
= dwarf2_full_name (die
, cu
);
5284 /* Given a pointer to a die which begins an enumeration, process all
5285 the dies that define the members of the enumeration, and create the
5286 symbol for the enumeration type.
5288 NOTE: We reverse the order of the element list. */
5291 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5293 struct objfile
*objfile
= cu
->objfile
;
5294 struct die_info
*child_die
;
5295 struct field
*fields
;
5298 int unsigned_enum
= 1;
5300 struct type
*this_type
;
5304 this_type
= get_die_type (die
, cu
);
5305 if (this_type
== NULL
)
5306 this_type
= read_enumeration_type (die
, cu
);
5307 if (die
->child
!= NULL
)
5309 child_die
= die
->child
;
5310 while (child_die
&& child_die
->tag
)
5312 if (child_die
->tag
!= DW_TAG_enumerator
)
5314 process_die (child_die
, cu
);
5318 name
= dwarf2_name (child_die
, cu
);
5321 sym
= new_symbol (child_die
, this_type
, cu
);
5322 if (SYMBOL_VALUE (sym
) < 0)
5325 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5327 fields
= (struct field
*)
5329 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5330 * sizeof (struct field
));
5333 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5334 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5335 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5336 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5342 child_die
= sibling_die (child_die
);
5347 TYPE_NFIELDS (this_type
) = num_fields
;
5348 TYPE_FIELDS (this_type
) = (struct field
*)
5349 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5350 memcpy (TYPE_FIELDS (this_type
), fields
,
5351 sizeof (struct field
) * num_fields
);
5355 TYPE_UNSIGNED (this_type
) = 1;
5358 new_symbol (die
, this_type
, cu
);
5361 /* Extract all information from a DW_TAG_array_type DIE and put it in
5362 the DIE's type field. For now, this only handles one dimensional
5365 static struct type
*
5366 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5368 struct objfile
*objfile
= cu
->objfile
;
5369 struct die_info
*child_die
;
5370 struct type
*type
= NULL
;
5371 struct type
*element_type
, *range_type
, *index_type
;
5372 struct type
**range_types
= NULL
;
5373 struct attribute
*attr
;
5375 struct cleanup
*back_to
;
5378 element_type
= die_type (die
, cu
);
5380 /* Irix 6.2 native cc creates array types without children for
5381 arrays with unspecified length. */
5382 if (die
->child
== NULL
)
5384 index_type
= objfile_type (objfile
)->builtin_int
;
5385 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5386 type
= create_array_type (NULL
, element_type
, range_type
);
5387 return set_die_type (die
, type
, cu
);
5390 back_to
= make_cleanup (null_cleanup
, NULL
);
5391 child_die
= die
->child
;
5392 while (child_die
&& child_die
->tag
)
5394 if (child_die
->tag
== DW_TAG_subrange_type
)
5396 struct type
*child_type
= read_type_die (child_die
, cu
);
5397 if (child_type
!= NULL
)
5399 /* The range type was succesfully read. Save it for
5400 the array type creation. */
5401 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5403 range_types
= (struct type
**)
5404 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5405 * sizeof (struct type
*));
5407 make_cleanup (free_current_contents
, &range_types
);
5409 range_types
[ndim
++] = child_type
;
5412 child_die
= sibling_die (child_die
);
5415 /* Dwarf2 dimensions are output from left to right, create the
5416 necessary array types in backwards order. */
5418 type
= element_type
;
5420 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5424 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5429 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5432 /* Understand Dwarf2 support for vector types (like they occur on
5433 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5434 array type. This is not part of the Dwarf2/3 standard yet, but a
5435 custom vendor extension. The main difference between a regular
5436 array and the vector variant is that vectors are passed by value
5438 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5440 make_vector_type (type
);
5442 name
= dwarf2_name (die
, cu
);
5444 TYPE_NAME (type
) = name
;
5446 set_descriptive_type (type
, die
, cu
);
5448 do_cleanups (back_to
);
5450 /* Install the type in the die. */
5451 return set_die_type (die
, type
, cu
);
5454 static enum dwarf_array_dim_ordering
5455 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5457 struct attribute
*attr
;
5459 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5461 if (attr
) return DW_SND (attr
);
5464 GNU F77 is a special case, as at 08/2004 array type info is the
5465 opposite order to the dwarf2 specification, but data is still
5466 laid out as per normal fortran.
5468 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5472 if (cu
->language
== language_fortran
5473 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5475 return DW_ORD_row_major
;
5478 switch (cu
->language_defn
->la_array_ordering
)
5480 case array_column_major
:
5481 return DW_ORD_col_major
;
5482 case array_row_major
:
5484 return DW_ORD_row_major
;
5488 /* Extract all information from a DW_TAG_set_type DIE and put it in
5489 the DIE's type field. */
5491 static struct type
*
5492 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5494 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5496 return set_die_type (die
, set_type
, cu
);
5499 /* First cut: install each common block member as a global variable. */
5502 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5504 struct die_info
*child_die
;
5505 struct attribute
*attr
;
5507 CORE_ADDR base
= (CORE_ADDR
) 0;
5509 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5512 /* Support the .debug_loc offsets */
5513 if (attr_form_is_block (attr
))
5515 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5517 else if (attr_form_is_section_offset (attr
))
5519 dwarf2_complex_location_expr_complaint ();
5523 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5524 "common block member");
5527 if (die
->child
!= NULL
)
5529 child_die
= die
->child
;
5530 while (child_die
&& child_die
->tag
)
5532 sym
= new_symbol (child_die
, NULL
, cu
);
5533 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5536 CORE_ADDR byte_offset
= 0;
5538 if (attr_form_is_section_offset (attr
))
5539 dwarf2_complex_location_expr_complaint ();
5540 else if (attr_form_is_constant (attr
))
5541 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5542 else if (attr_form_is_block (attr
))
5543 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5545 dwarf2_complex_location_expr_complaint ();
5547 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5548 add_symbol_to_list (sym
, &global_symbols
);
5550 child_die
= sibling_die (child_die
);
5555 /* Create a type for a C++ namespace. */
5557 static struct type
*
5558 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5560 struct objfile
*objfile
= cu
->objfile
;
5561 const char *previous_prefix
, *name
;
5565 /* For extensions, reuse the type of the original namespace. */
5566 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5568 struct die_info
*ext_die
;
5569 struct dwarf2_cu
*ext_cu
= cu
;
5570 ext_die
= dwarf2_extension (die
, &ext_cu
);
5571 type
= read_type_die (ext_die
, ext_cu
);
5572 return set_die_type (die
, type
, cu
);
5575 name
= namespace_name (die
, &is_anonymous
, cu
);
5577 /* Now build the name of the current namespace. */
5579 previous_prefix
= determine_prefix (die
, cu
);
5580 if (previous_prefix
[0] != '\0')
5581 name
= typename_concat (&objfile
->objfile_obstack
,
5582 previous_prefix
, name
, cu
);
5584 /* Create the type. */
5585 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5587 TYPE_NAME (type
) = (char *) name
;
5588 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5590 set_die_type (die
, type
, cu
);
5595 /* Read a C++ namespace. */
5598 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5600 struct objfile
*objfile
= cu
->objfile
;
5604 /* Add a symbol associated to this if we haven't seen the namespace
5605 before. Also, add a using directive if it's an anonymous
5608 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5612 type
= read_type_die (die
, cu
);
5613 new_symbol (die
, type
, cu
);
5615 name
= namespace_name (die
, &is_anonymous
, cu
);
5618 const char *previous_prefix
= determine_prefix (die
, cu
);
5619 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5623 if (die
->child
!= NULL
)
5625 struct die_info
*child_die
= die
->child
;
5627 while (child_die
&& child_die
->tag
)
5629 process_die (child_die
, cu
);
5630 child_die
= sibling_die (child_die
);
5635 /* Read a Fortran module. */
5638 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5640 struct die_info
*child_die
= die
->child
;
5642 /* FIXME: Support the separate Fortran module namespaces. */
5644 while (child_die
&& child_die
->tag
)
5646 process_die (child_die
, cu
);
5647 child_die
= sibling_die (child_die
);
5651 /* Return the name of the namespace represented by DIE. Set
5652 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5656 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5658 struct die_info
*current_die
;
5659 const char *name
= NULL
;
5661 /* Loop through the extensions until we find a name. */
5663 for (current_die
= die
;
5664 current_die
!= NULL
;
5665 current_die
= dwarf2_extension (die
, &cu
))
5667 name
= dwarf2_name (current_die
, cu
);
5672 /* Is it an anonymous namespace? */
5674 *is_anonymous
= (name
== NULL
);
5676 name
= "(anonymous namespace)";
5681 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5682 the user defined type vector. */
5684 static struct type
*
5685 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5687 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5688 struct comp_unit_head
*cu_header
= &cu
->header
;
5690 struct attribute
*attr_byte_size
;
5691 struct attribute
*attr_address_class
;
5692 int byte_size
, addr_class
;
5694 type
= lookup_pointer_type (die_type (die
, cu
));
5696 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5698 byte_size
= DW_UNSND (attr_byte_size
);
5700 byte_size
= cu_header
->addr_size
;
5702 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5703 if (attr_address_class
)
5704 addr_class
= DW_UNSND (attr_address_class
);
5706 addr_class
= DW_ADDR_none
;
5708 /* If the pointer size or address class is different than the
5709 default, create a type variant marked as such and set the
5710 length accordingly. */
5711 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5713 if (gdbarch_address_class_type_flags_p (gdbarch
))
5717 type_flags
= gdbarch_address_class_type_flags
5718 (gdbarch
, byte_size
, addr_class
);
5719 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5721 type
= make_type_with_address_space (type
, type_flags
);
5723 else if (TYPE_LENGTH (type
) != byte_size
)
5725 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5728 /* Should we also complain about unhandled address classes? */
5732 TYPE_LENGTH (type
) = byte_size
;
5733 return set_die_type (die
, type
, cu
);
5736 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5737 the user defined type vector. */
5739 static struct type
*
5740 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5742 struct objfile
*objfile
= cu
->objfile
;
5744 struct type
*to_type
;
5745 struct type
*domain
;
5747 to_type
= die_type (die
, cu
);
5748 domain
= die_containing_type (die
, cu
);
5750 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5751 type
= lookup_methodptr_type (to_type
);
5753 type
= lookup_memberptr_type (to_type
, domain
);
5755 return set_die_type (die
, type
, cu
);
5758 /* Extract all information from a DW_TAG_reference_type DIE and add to
5759 the user defined type vector. */
5761 static struct type
*
5762 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5764 struct comp_unit_head
*cu_header
= &cu
->header
;
5766 struct attribute
*attr
;
5768 type
= lookup_reference_type (die_type (die
, cu
));
5769 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5772 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5776 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5778 return set_die_type (die
, type
, cu
);
5781 static struct type
*
5782 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5784 struct type
*base_type
, *cv_type
;
5786 base_type
= die_type (die
, cu
);
5787 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5788 return set_die_type (die
, cv_type
, cu
);
5791 static struct type
*
5792 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5794 struct type
*base_type
, *cv_type
;
5796 base_type
= die_type (die
, cu
);
5797 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5798 return set_die_type (die
, cv_type
, cu
);
5801 /* Extract all information from a DW_TAG_string_type DIE and add to
5802 the user defined type vector. It isn't really a user defined type,
5803 but it behaves like one, with other DIE's using an AT_user_def_type
5804 attribute to reference it. */
5806 static struct type
*
5807 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5809 struct objfile
*objfile
= cu
->objfile
;
5810 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5811 struct type
*type
, *range_type
, *index_type
, *char_type
;
5812 struct attribute
*attr
;
5813 unsigned int length
;
5815 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5818 length
= DW_UNSND (attr
);
5822 /* check for the DW_AT_byte_size attribute */
5823 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5826 length
= DW_UNSND (attr
);
5834 index_type
= objfile_type (objfile
)->builtin_int
;
5835 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5836 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5837 type
= create_string_type (NULL
, char_type
, range_type
);
5839 return set_die_type (die
, type
, cu
);
5842 /* Handle DIES due to C code like:
5846 int (*funcp)(int a, long l);
5850 ('funcp' generates a DW_TAG_subroutine_type DIE)
5853 static struct type
*
5854 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5856 struct type
*type
; /* Type that this function returns */
5857 struct type
*ftype
; /* Function that returns above type */
5858 struct attribute
*attr
;
5860 type
= die_type (die
, cu
);
5861 ftype
= lookup_function_type (type
);
5863 /* All functions in C++, Pascal and Java have prototypes. */
5864 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5865 if ((attr
&& (DW_UNSND (attr
) != 0))
5866 || cu
->language
== language_cplus
5867 || cu
->language
== language_java
5868 || cu
->language
== language_pascal
)
5869 TYPE_PROTOTYPED (ftype
) = 1;
5871 /* Store the calling convention in the type if it's available in
5872 the subroutine die. Otherwise set the calling convention to
5873 the default value DW_CC_normal. */
5874 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5875 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5877 /* We need to add the subroutine type to the die immediately so
5878 we don't infinitely recurse when dealing with parameters
5879 declared as the same subroutine type. */
5880 set_die_type (die
, ftype
, cu
);
5882 if (die
->child
!= NULL
)
5884 struct die_info
*child_die
;
5888 /* Count the number of parameters.
5889 FIXME: GDB currently ignores vararg functions, but knows about
5890 vararg member functions. */
5891 child_die
= die
->child
;
5892 while (child_die
&& child_die
->tag
)
5894 if (child_die
->tag
== DW_TAG_formal_parameter
)
5896 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5897 TYPE_VARARGS (ftype
) = 1;
5898 child_die
= sibling_die (child_die
);
5901 /* Allocate storage for parameters and fill them in. */
5902 TYPE_NFIELDS (ftype
) = nparams
;
5903 TYPE_FIELDS (ftype
) = (struct field
*)
5904 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5906 child_die
= die
->child
;
5907 while (child_die
&& child_die
->tag
)
5909 if (child_die
->tag
== DW_TAG_formal_parameter
)
5911 /* Dwarf2 has no clean way to discern C++ static and non-static
5912 member functions. G++ helps GDB by marking the first
5913 parameter for non-static member functions (which is the
5914 this pointer) as artificial. We pass this information
5915 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5916 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5918 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5920 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5921 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5924 child_die
= sibling_die (child_die
);
5931 static struct type
*
5932 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5934 struct objfile
*objfile
= cu
->objfile
;
5935 struct attribute
*attr
;
5936 const char *name
= NULL
;
5937 struct type
*this_type
;
5939 name
= dwarf2_full_name (die
, cu
);
5940 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5941 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5942 TYPE_NAME (this_type
) = (char *) name
;
5943 set_die_type (die
, this_type
, cu
);
5944 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5948 /* Find a representation of a given base type and install
5949 it in the TYPE field of the die. */
5951 static struct type
*
5952 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5954 struct objfile
*objfile
= cu
->objfile
;
5956 struct attribute
*attr
;
5957 int encoding
= 0, size
= 0;
5959 enum type_code code
= TYPE_CODE_INT
;
5961 struct type
*target_type
= NULL
;
5963 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5966 encoding
= DW_UNSND (attr
);
5968 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5971 size
= DW_UNSND (attr
);
5973 name
= dwarf2_name (die
, cu
);
5976 complaint (&symfile_complaints
,
5977 _("DW_AT_name missing from DW_TAG_base_type"));
5982 case DW_ATE_address
:
5983 /* Turn DW_ATE_address into a void * pointer. */
5984 code
= TYPE_CODE_PTR
;
5985 type_flags
|= TYPE_FLAG_UNSIGNED
;
5986 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5988 case DW_ATE_boolean
:
5989 code
= TYPE_CODE_BOOL
;
5990 type_flags
|= TYPE_FLAG_UNSIGNED
;
5992 case DW_ATE_complex_float
:
5993 code
= TYPE_CODE_COMPLEX
;
5994 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5996 case DW_ATE_decimal_float
:
5997 code
= TYPE_CODE_DECFLOAT
;
6000 code
= TYPE_CODE_FLT
;
6004 case DW_ATE_unsigned
:
6005 type_flags
|= TYPE_FLAG_UNSIGNED
;
6007 case DW_ATE_signed_char
:
6008 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6009 || cu
->language
== language_pascal
)
6010 code
= TYPE_CODE_CHAR
;
6012 case DW_ATE_unsigned_char
:
6013 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6014 || cu
->language
== language_pascal
)
6015 code
= TYPE_CODE_CHAR
;
6016 type_flags
|= TYPE_FLAG_UNSIGNED
;
6019 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6020 dwarf_type_encoding_name (encoding
));
6024 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6025 TYPE_NAME (type
) = name
;
6026 TYPE_TARGET_TYPE (type
) = target_type
;
6028 if (name
&& strcmp (name
, "char") == 0)
6029 TYPE_NOSIGN (type
) = 1;
6031 return set_die_type (die
, type
, cu
);
6034 /* Read the given DW_AT_subrange DIE. */
6036 static struct type
*
6037 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6039 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6040 struct type
*base_type
;
6041 struct type
*range_type
;
6042 struct attribute
*attr
;
6046 LONGEST negative_mask
;
6048 base_type
= die_type (die
, cu
);
6049 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6051 complaint (&symfile_complaints
,
6052 _("DW_AT_type missing from DW_TAG_subrange_type"));
6054 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6055 0, NULL
, cu
->objfile
);
6058 if (cu
->language
== language_fortran
)
6060 /* FORTRAN implies a lower bound of 1, if not given. */
6064 /* FIXME: For variable sized arrays either of these could be
6065 a variable rather than a constant value. We'll allow it,
6066 but we don't know how to handle it. */
6067 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6069 low
= dwarf2_get_attr_constant_value (attr
, 0);
6071 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6074 if (attr
->form
== DW_FORM_block1
)
6076 /* GCC encodes arrays with unspecified or dynamic length
6077 with a DW_FORM_block1 attribute.
6078 FIXME: GDB does not yet know how to handle dynamic
6079 arrays properly, treat them as arrays with unspecified
6082 FIXME: jimb/2003-09-22: GDB does not really know
6083 how to handle arrays of unspecified length
6084 either; we just represent them as zero-length
6085 arrays. Choose an appropriate upper bound given
6086 the lower bound we've computed above. */
6090 high
= dwarf2_get_attr_constant_value (attr
, 1);
6094 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6095 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6096 low
|= negative_mask
;
6097 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6098 high
|= negative_mask
;
6100 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6102 name
= dwarf2_name (die
, cu
);
6104 TYPE_NAME (range_type
) = name
;
6106 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6108 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6110 set_descriptive_type (range_type
, die
, cu
);
6112 return set_die_type (die
, range_type
, cu
);
6115 static struct type
*
6116 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6120 /* For now, we only support the C meaning of an unspecified type: void. */
6122 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6123 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6125 return set_die_type (die
, type
, cu
);
6128 /* Trivial hash function for die_info: the hash value of a DIE
6129 is its offset in .debug_info for this objfile. */
6132 die_hash (const void *item
)
6134 const struct die_info
*die
= item
;
6138 /* Trivial comparison function for die_info structures: two DIEs
6139 are equal if they have the same offset. */
6142 die_eq (const void *item_lhs
, const void *item_rhs
)
6144 const struct die_info
*die_lhs
= item_lhs
;
6145 const struct die_info
*die_rhs
= item_rhs
;
6146 return die_lhs
->offset
== die_rhs
->offset
;
6149 /* Read a whole compilation unit into a linked list of dies. */
6151 static struct die_info
*
6152 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6154 struct die_reader_specs reader_specs
;
6156 gdb_assert (cu
->die_hash
== NULL
);
6158 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6162 &cu
->comp_unit_obstack
,
6163 hashtab_obstack_allocate
,
6164 dummy_obstack_deallocate
);
6166 init_cu_die_reader (&reader_specs
, cu
);
6168 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6171 /* Main entry point for reading a DIE and all children.
6172 Read the DIE and dump it if requested. */
6174 static struct die_info
*
6175 read_die_and_children (const struct die_reader_specs
*reader
,
6177 gdb_byte
**new_info_ptr
,
6178 struct die_info
*parent
)
6180 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6181 new_info_ptr
, parent
);
6183 if (dwarf2_die_debug
)
6185 fprintf_unfiltered (gdb_stdlog
,
6186 "\nRead die from %s of %s:\n",
6187 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6189 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6191 : "unknown section",
6192 reader
->abfd
->filename
);
6193 dump_die (result
, dwarf2_die_debug
);
6199 /* Read a single die and all its descendents. Set the die's sibling
6200 field to NULL; set other fields in the die correctly, and set all
6201 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6202 location of the info_ptr after reading all of those dies. PARENT
6203 is the parent of the die in question. */
6205 static struct die_info
*
6206 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6208 gdb_byte
**new_info_ptr
,
6209 struct die_info
*parent
)
6211 struct die_info
*die
;
6215 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6218 *new_info_ptr
= cur_ptr
;
6221 store_in_ref_table (die
, reader
->cu
);
6224 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6228 *new_info_ptr
= cur_ptr
;
6231 die
->sibling
= NULL
;
6232 die
->parent
= parent
;
6236 /* Read a die, all of its descendents, and all of its siblings; set
6237 all of the fields of all of the dies correctly. Arguments are as
6238 in read_die_and_children. */
6240 static struct die_info
*
6241 read_die_and_siblings (const struct die_reader_specs
*reader
,
6243 gdb_byte
**new_info_ptr
,
6244 struct die_info
*parent
)
6246 struct die_info
*first_die
, *last_sibling
;
6250 first_die
= last_sibling
= NULL
;
6254 struct die_info
*die
6255 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6259 *new_info_ptr
= cur_ptr
;
6266 last_sibling
->sibling
= die
;
6272 /* Read the die from the .debug_info section buffer. Set DIEP to
6273 point to a newly allocated die with its information, except for its
6274 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6275 whether the die has children or not. */
6278 read_full_die (const struct die_reader_specs
*reader
,
6279 struct die_info
**diep
, gdb_byte
*info_ptr
,
6282 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6283 struct abbrev_info
*abbrev
;
6284 struct die_info
*die
;
6285 struct dwarf2_cu
*cu
= reader
->cu
;
6286 bfd
*abfd
= reader
->abfd
;
6288 offset
= info_ptr
- reader
->buffer
;
6289 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6290 info_ptr
+= bytes_read
;
6298 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6300 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6302 bfd_get_filename (abfd
));
6304 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6305 die
->offset
= offset
;
6306 die
->tag
= abbrev
->tag
;
6307 die
->abbrev
= abbrev_number
;
6309 die
->num_attrs
= abbrev
->num_attrs
;
6311 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6312 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6313 abfd
, info_ptr
, cu
);
6316 *has_children
= abbrev
->has_children
;
6320 /* In DWARF version 2, the description of the debugging information is
6321 stored in a separate .debug_abbrev section. Before we read any
6322 dies from a section we read in all abbreviations and install them
6323 in a hash table. This function also sets flags in CU describing
6324 the data found in the abbrev table. */
6327 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6329 struct comp_unit_head
*cu_header
= &cu
->header
;
6330 gdb_byte
*abbrev_ptr
;
6331 struct abbrev_info
*cur_abbrev
;
6332 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6333 unsigned int abbrev_form
, hash_number
;
6334 struct attr_abbrev
*cur_attrs
;
6335 unsigned int allocated_attrs
;
6337 /* Initialize dwarf2 abbrevs */
6338 obstack_init (&cu
->abbrev_obstack
);
6339 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6341 * sizeof (struct abbrev_info
*)));
6342 memset (cu
->dwarf2_abbrevs
, 0,
6343 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6345 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6346 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6347 abbrev_ptr
+= bytes_read
;
6349 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6350 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6352 /* loop until we reach an abbrev number of 0 */
6353 while (abbrev_number
)
6355 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6357 /* read in abbrev header */
6358 cur_abbrev
->number
= abbrev_number
;
6359 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6360 abbrev_ptr
+= bytes_read
;
6361 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6364 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6365 cu
->has_namespace_info
= 1;
6367 /* now read in declarations */
6368 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6369 abbrev_ptr
+= bytes_read
;
6370 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6371 abbrev_ptr
+= bytes_read
;
6374 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6376 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6378 = xrealloc (cur_attrs
, (allocated_attrs
6379 * sizeof (struct attr_abbrev
)));
6382 /* Record whether this compilation unit might have
6383 inter-compilation-unit references. If we don't know what form
6384 this attribute will have, then it might potentially be a
6385 DW_FORM_ref_addr, so we conservatively expect inter-CU
6388 if (abbrev_form
== DW_FORM_ref_addr
6389 || abbrev_form
== DW_FORM_indirect
)
6390 cu
->has_form_ref_addr
= 1;
6392 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6393 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6394 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6395 abbrev_ptr
+= bytes_read
;
6396 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6397 abbrev_ptr
+= bytes_read
;
6400 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6401 (cur_abbrev
->num_attrs
6402 * sizeof (struct attr_abbrev
)));
6403 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6404 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6406 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6407 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6408 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6410 /* Get next abbreviation.
6411 Under Irix6 the abbreviations for a compilation unit are not
6412 always properly terminated with an abbrev number of 0.
6413 Exit loop if we encounter an abbreviation which we have
6414 already read (which means we are about to read the abbreviations
6415 for the next compile unit) or if the end of the abbreviation
6416 table is reached. */
6417 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6418 >= dwarf2_per_objfile
->abbrev
.size
)
6420 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6421 abbrev_ptr
+= bytes_read
;
6422 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6429 /* Release the memory used by the abbrev table for a compilation unit. */
6432 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6434 struct dwarf2_cu
*cu
= ptr_to_cu
;
6436 obstack_free (&cu
->abbrev_obstack
, NULL
);
6437 cu
->dwarf2_abbrevs
= NULL
;
6440 /* Lookup an abbrev_info structure in the abbrev hash table. */
6442 static struct abbrev_info
*
6443 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6445 unsigned int hash_number
;
6446 struct abbrev_info
*abbrev
;
6448 hash_number
= number
% ABBREV_HASH_SIZE
;
6449 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6453 if (abbrev
->number
== number
)
6456 abbrev
= abbrev
->next
;
6461 /* Returns nonzero if TAG represents a type that we might generate a partial
6465 is_type_tag_for_partial (int tag
)
6470 /* Some types that would be reasonable to generate partial symbols for,
6471 that we don't at present. */
6472 case DW_TAG_array_type
:
6473 case DW_TAG_file_type
:
6474 case DW_TAG_ptr_to_member_type
:
6475 case DW_TAG_set_type
:
6476 case DW_TAG_string_type
:
6477 case DW_TAG_subroutine_type
:
6479 case DW_TAG_base_type
:
6480 case DW_TAG_class_type
:
6481 case DW_TAG_interface_type
:
6482 case DW_TAG_enumeration_type
:
6483 case DW_TAG_structure_type
:
6484 case DW_TAG_subrange_type
:
6485 case DW_TAG_typedef
:
6486 case DW_TAG_union_type
:
6493 /* Load all DIEs that are interesting for partial symbols into memory. */
6495 static struct partial_die_info
*
6496 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6497 int building_psymtab
, struct dwarf2_cu
*cu
)
6499 struct partial_die_info
*part_die
;
6500 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6501 struct abbrev_info
*abbrev
;
6502 unsigned int bytes_read
;
6503 unsigned int load_all
= 0;
6505 int nesting_level
= 1;
6510 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6514 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6518 &cu
->comp_unit_obstack
,
6519 hashtab_obstack_allocate
,
6520 dummy_obstack_deallocate
);
6522 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6523 sizeof (struct partial_die_info
));
6527 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6529 /* A NULL abbrev means the end of a series of children. */
6532 if (--nesting_level
== 0)
6534 /* PART_DIE was probably the last thing allocated on the
6535 comp_unit_obstack, so we could call obstack_free
6536 here. We don't do that because the waste is small,
6537 and will be cleaned up when we're done with this
6538 compilation unit. This way, we're also more robust
6539 against other users of the comp_unit_obstack. */
6542 info_ptr
+= bytes_read
;
6543 last_die
= parent_die
;
6544 parent_die
= parent_die
->die_parent
;
6548 /* Check whether this DIE is interesting enough to save. Normally
6549 we would not be interested in members here, but there may be
6550 later variables referencing them via DW_AT_specification (for
6553 && !is_type_tag_for_partial (abbrev
->tag
)
6554 && abbrev
->tag
!= DW_TAG_enumerator
6555 && abbrev
->tag
!= DW_TAG_subprogram
6556 && abbrev
->tag
!= DW_TAG_lexical_block
6557 && abbrev
->tag
!= DW_TAG_variable
6558 && abbrev
->tag
!= DW_TAG_namespace
6559 && abbrev
->tag
!= DW_TAG_member
)
6561 /* Otherwise we skip to the next sibling, if any. */
6562 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6566 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6567 buffer
, info_ptr
, cu
);
6569 /* This two-pass algorithm for processing partial symbols has a
6570 high cost in cache pressure. Thus, handle some simple cases
6571 here which cover the majority of C partial symbols. DIEs
6572 which neither have specification tags in them, nor could have
6573 specification tags elsewhere pointing at them, can simply be
6574 processed and discarded.
6576 This segment is also optional; scan_partial_symbols and
6577 add_partial_symbol will handle these DIEs if we chain
6578 them in normally. When compilers which do not emit large
6579 quantities of duplicate debug information are more common,
6580 this code can probably be removed. */
6582 /* Any complete simple types at the top level (pretty much all
6583 of them, for a language without namespaces), can be processed
6585 if (parent_die
== NULL
6586 && part_die
->has_specification
== 0
6587 && part_die
->is_declaration
== 0
6588 && (part_die
->tag
== DW_TAG_typedef
6589 || part_die
->tag
== DW_TAG_base_type
6590 || part_die
->tag
== DW_TAG_subrange_type
))
6592 if (building_psymtab
&& part_die
->name
!= NULL
)
6593 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6594 VAR_DOMAIN
, LOC_TYPEDEF
,
6595 &cu
->objfile
->static_psymbols
,
6596 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6597 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6601 /* If we're at the second level, and we're an enumerator, and
6602 our parent has no specification (meaning possibly lives in a
6603 namespace elsewhere), then we can add the partial symbol now
6604 instead of queueing it. */
6605 if (part_die
->tag
== DW_TAG_enumerator
6606 && parent_die
!= NULL
6607 && parent_die
->die_parent
== NULL
6608 && parent_die
->tag
== DW_TAG_enumeration_type
6609 && parent_die
->has_specification
== 0)
6611 if (part_die
->name
== NULL
)
6612 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6613 else if (building_psymtab
)
6614 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6615 VAR_DOMAIN
, LOC_CONST
,
6616 (cu
->language
== language_cplus
6617 || cu
->language
== language_java
)
6618 ? &cu
->objfile
->global_psymbols
6619 : &cu
->objfile
->static_psymbols
,
6620 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6622 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6626 /* We'll save this DIE so link it in. */
6627 part_die
->die_parent
= parent_die
;
6628 part_die
->die_sibling
= NULL
;
6629 part_die
->die_child
= NULL
;
6631 if (last_die
&& last_die
== parent_die
)
6632 last_die
->die_child
= part_die
;
6634 last_die
->die_sibling
= part_die
;
6636 last_die
= part_die
;
6638 if (first_die
== NULL
)
6639 first_die
= part_die
;
6641 /* Maybe add the DIE to the hash table. Not all DIEs that we
6642 find interesting need to be in the hash table, because we
6643 also have the parent/sibling/child chains; only those that we
6644 might refer to by offset later during partial symbol reading.
6646 For now this means things that might have be the target of a
6647 DW_AT_specification, DW_AT_abstract_origin, or
6648 DW_AT_extension. DW_AT_extension will refer only to
6649 namespaces; DW_AT_abstract_origin refers to functions (and
6650 many things under the function DIE, but we do not recurse
6651 into function DIEs during partial symbol reading) and
6652 possibly variables as well; DW_AT_specification refers to
6653 declarations. Declarations ought to have the DW_AT_declaration
6654 flag. It happens that GCC forgets to put it in sometimes, but
6655 only for functions, not for types.
6657 Adding more things than necessary to the hash table is harmless
6658 except for the performance cost. Adding too few will result in
6659 wasted time in find_partial_die, when we reread the compilation
6660 unit with load_all_dies set. */
6663 || abbrev
->tag
== DW_TAG_subprogram
6664 || abbrev
->tag
== DW_TAG_variable
6665 || abbrev
->tag
== DW_TAG_namespace
6666 || part_die
->is_declaration
)
6670 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6671 part_die
->offset
, INSERT
);
6675 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6676 sizeof (struct partial_die_info
));
6678 /* For some DIEs we want to follow their children (if any). For C
6679 we have no reason to follow the children of structures; for other
6680 languages we have to, both so that we can get at method physnames
6681 to infer fully qualified class names, and for DW_AT_specification.
6683 For Ada, we need to scan the children of subprograms and lexical
6684 blocks as well because Ada allows the definition of nested
6685 entities that could be interesting for the debugger, such as
6686 nested subprograms for instance. */
6687 if (last_die
->has_children
6689 || last_die
->tag
== DW_TAG_namespace
6690 || last_die
->tag
== DW_TAG_enumeration_type
6691 || (cu
->language
!= language_c
6692 && (last_die
->tag
== DW_TAG_class_type
6693 || last_die
->tag
== DW_TAG_interface_type
6694 || last_die
->tag
== DW_TAG_structure_type
6695 || last_die
->tag
== DW_TAG_union_type
))
6696 || (cu
->language
== language_ada
6697 && (last_die
->tag
== DW_TAG_subprogram
6698 || last_die
->tag
== DW_TAG_lexical_block
))))
6701 parent_die
= last_die
;
6705 /* Otherwise we skip to the next sibling, if any. */
6706 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6708 /* Back to the top, do it again. */
6712 /* Read a minimal amount of information into the minimal die structure. */
6715 read_partial_die (struct partial_die_info
*part_die
,
6716 struct abbrev_info
*abbrev
,
6717 unsigned int abbrev_len
, bfd
*abfd
,
6718 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6719 struct dwarf2_cu
*cu
)
6721 unsigned int bytes_read
, i
;
6722 struct attribute attr
;
6723 int has_low_pc_attr
= 0;
6724 int has_high_pc_attr
= 0;
6726 memset (part_die
, 0, sizeof (struct partial_die_info
));
6728 part_die
->offset
= info_ptr
- buffer
;
6730 info_ptr
+= abbrev_len
;
6735 part_die
->tag
= abbrev
->tag
;
6736 part_die
->has_children
= abbrev
->has_children
;
6738 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6740 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6742 /* Store the data if it is of an attribute we want to keep in a
6743 partial symbol table. */
6747 switch (part_die
->tag
)
6749 case DW_TAG_compile_unit
:
6750 case DW_TAG_type_unit
:
6751 /* Compilation units have a DW_AT_name that is a filename, not
6752 a source language identifier. */
6753 case DW_TAG_enumeration_type
:
6754 case DW_TAG_enumerator
:
6755 /* These tags always have simple identifiers already; no need
6756 to canonicalize them. */
6757 part_die
->name
= DW_STRING (&attr
);
6761 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6762 &cu
->objfile
->objfile_obstack
);
6766 case DW_AT_MIPS_linkage_name
:
6767 part_die
->name
= DW_STRING (&attr
);
6770 has_low_pc_attr
= 1;
6771 part_die
->lowpc
= DW_ADDR (&attr
);
6774 has_high_pc_attr
= 1;
6775 part_die
->highpc
= DW_ADDR (&attr
);
6777 case DW_AT_location
:
6778 /* Support the .debug_loc offsets */
6779 if (attr_form_is_block (&attr
))
6781 part_die
->locdesc
= DW_BLOCK (&attr
);
6783 else if (attr_form_is_section_offset (&attr
))
6785 dwarf2_complex_location_expr_complaint ();
6789 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6790 "partial symbol information");
6793 case DW_AT_external
:
6794 part_die
->is_external
= DW_UNSND (&attr
);
6796 case DW_AT_declaration
:
6797 part_die
->is_declaration
= DW_UNSND (&attr
);
6800 part_die
->has_type
= 1;
6802 case DW_AT_abstract_origin
:
6803 case DW_AT_specification
:
6804 case DW_AT_extension
:
6805 part_die
->has_specification
= 1;
6806 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6809 /* Ignore absolute siblings, they might point outside of
6810 the current compile unit. */
6811 if (attr
.form
== DW_FORM_ref_addr
)
6812 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6814 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6816 case DW_AT_byte_size
:
6817 part_die
->has_byte_size
= 1;
6819 case DW_AT_calling_convention
:
6820 /* DWARF doesn't provide a way to identify a program's source-level
6821 entry point. DW_AT_calling_convention attributes are only meant
6822 to describe functions' calling conventions.
6824 However, because it's a necessary piece of information in
6825 Fortran, and because DW_CC_program is the only piece of debugging
6826 information whose definition refers to a 'main program' at all,
6827 several compilers have begun marking Fortran main programs with
6828 DW_CC_program --- even when those functions use the standard
6829 calling conventions.
6831 So until DWARF specifies a way to provide this information and
6832 compilers pick up the new representation, we'll support this
6834 if (DW_UNSND (&attr
) == DW_CC_program
6835 && cu
->language
== language_fortran
)
6836 set_main_name (part_die
->name
);
6843 /* When using the GNU linker, .gnu.linkonce. sections are used to
6844 eliminate duplicate copies of functions and vtables and such.
6845 The linker will arbitrarily choose one and discard the others.
6846 The AT_*_pc values for such functions refer to local labels in
6847 these sections. If the section from that file was discarded, the
6848 labels are not in the output, so the relocs get a value of 0.
6849 If this is a discarded function, mark the pc bounds as invalid,
6850 so that GDB will ignore it. */
6851 if (has_low_pc_attr
&& has_high_pc_attr
6852 && part_die
->lowpc
< part_die
->highpc
6853 && (part_die
->lowpc
!= 0
6854 || dwarf2_per_objfile
->has_section_at_zero
))
6855 part_die
->has_pc_info
= 1;
6860 /* Find a cached partial DIE at OFFSET in CU. */
6862 static struct partial_die_info
*
6863 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6865 struct partial_die_info
*lookup_die
= NULL
;
6866 struct partial_die_info part_die
;
6868 part_die
.offset
= offset
;
6869 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6874 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6875 except in the case of .debug_types DIEs which do not reference
6876 outside their CU (they do however referencing other types via
6879 static struct partial_die_info
*
6880 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6882 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6883 struct partial_die_info
*pd
= NULL
;
6885 if (cu
->per_cu
->from_debug_types
)
6887 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6893 if (offset_in_cu_p (&cu
->header
, offset
))
6895 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6900 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6902 if (per_cu
->cu
== NULL
)
6904 load_partial_comp_unit (per_cu
, cu
->objfile
);
6905 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6906 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6909 per_cu
->cu
->last_used
= 0;
6910 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6912 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6914 struct cleanup
*back_to
;
6915 struct partial_die_info comp_unit_die
;
6916 struct abbrev_info
*abbrev
;
6917 unsigned int bytes_read
;
6920 per_cu
->load_all_dies
= 1;
6922 /* Re-read the DIEs. */
6923 back_to
= make_cleanup (null_cleanup
, 0);
6924 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6926 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6927 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6929 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6930 + per_cu
->cu
->header
.offset
6931 + per_cu
->cu
->header
.first_die_offset
);
6932 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6933 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6934 per_cu
->cu
->objfile
->obfd
,
6935 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6937 if (comp_unit_die
.has_children
)
6938 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6939 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6941 do_cleanups (back_to
);
6943 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6949 internal_error (__FILE__
, __LINE__
,
6950 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6951 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6955 /* Adjust PART_DIE before generating a symbol for it. This function
6956 may set the is_external flag or change the DIE's name. */
6959 fixup_partial_die (struct partial_die_info
*part_die
,
6960 struct dwarf2_cu
*cu
)
6962 /* If we found a reference attribute and the DIE has no name, try
6963 to find a name in the referred to DIE. */
6965 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6967 struct partial_die_info
*spec_die
;
6969 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6971 fixup_partial_die (spec_die
, cu
);
6975 part_die
->name
= spec_die
->name
;
6977 /* Copy DW_AT_external attribute if it is set. */
6978 if (spec_die
->is_external
)
6979 part_die
->is_external
= spec_die
->is_external
;
6983 /* Set default names for some unnamed DIEs. */
6984 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6985 || part_die
->tag
== DW_TAG_class_type
))
6986 part_die
->name
= "(anonymous class)";
6988 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6989 part_die
->name
= "(anonymous namespace)";
6991 if (part_die
->tag
== DW_TAG_structure_type
6992 || part_die
->tag
== DW_TAG_class_type
6993 || part_die
->tag
== DW_TAG_union_type
)
6994 guess_structure_name (part_die
, cu
);
6997 /* Read an attribute value described by an attribute form. */
7000 read_attribute_value (struct attribute
*attr
, unsigned form
,
7001 bfd
*abfd
, gdb_byte
*info_ptr
,
7002 struct dwarf2_cu
*cu
)
7004 struct comp_unit_head
*cu_header
= &cu
->header
;
7005 unsigned int bytes_read
;
7006 struct dwarf_block
*blk
;
7012 case DW_FORM_ref_addr
:
7013 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7014 info_ptr
+= bytes_read
;
7016 case DW_FORM_block2
:
7017 blk
= dwarf_alloc_block (cu
);
7018 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7020 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7021 info_ptr
+= blk
->size
;
7022 DW_BLOCK (attr
) = blk
;
7024 case DW_FORM_block4
:
7025 blk
= dwarf_alloc_block (cu
);
7026 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7028 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7029 info_ptr
+= blk
->size
;
7030 DW_BLOCK (attr
) = blk
;
7033 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7037 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7041 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7044 case DW_FORM_string
:
7045 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7046 DW_STRING_IS_CANONICAL (attr
) = 0;
7047 info_ptr
+= bytes_read
;
7050 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7052 DW_STRING_IS_CANONICAL (attr
) = 0;
7053 info_ptr
+= bytes_read
;
7056 blk
= dwarf_alloc_block (cu
);
7057 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7058 info_ptr
+= bytes_read
;
7059 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7060 info_ptr
+= blk
->size
;
7061 DW_BLOCK (attr
) = blk
;
7063 case DW_FORM_block1
:
7064 blk
= dwarf_alloc_block (cu
);
7065 blk
->size
= read_1_byte (abfd
, info_ptr
);
7067 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7068 info_ptr
+= blk
->size
;
7069 DW_BLOCK (attr
) = blk
;
7072 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7076 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7080 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7081 info_ptr
+= bytes_read
;
7084 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7085 info_ptr
+= bytes_read
;
7088 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7092 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7096 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7100 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7104 /* Convert the signature to something we can record in DW_UNSND
7106 NOTE: This is NULL if the type wasn't found. */
7107 DW_SIGNATURED_TYPE (attr
) =
7108 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7111 case DW_FORM_ref_udata
:
7112 DW_ADDR (attr
) = (cu
->header
.offset
7113 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7114 info_ptr
+= bytes_read
;
7116 case DW_FORM_indirect
:
7117 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7118 info_ptr
+= bytes_read
;
7119 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7122 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7123 dwarf_form_name (form
),
7124 bfd_get_filename (abfd
));
7127 /* We have seen instances where the compiler tried to emit a byte
7128 size attribute of -1 which ended up being encoded as an unsigned
7129 0xffffffff. Although 0xffffffff is technically a valid size value,
7130 an object of this size seems pretty unlikely so we can relatively
7131 safely treat these cases as if the size attribute was invalid and
7132 treat them as zero by default. */
7133 if (attr
->name
== DW_AT_byte_size
7134 && form
== DW_FORM_data4
7135 && DW_UNSND (attr
) >= 0xffffffff)
7138 (&symfile_complaints
,
7139 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7140 hex_string (DW_UNSND (attr
)));
7141 DW_UNSND (attr
) = 0;
7147 /* Read an attribute described by an abbreviated attribute. */
7150 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7151 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7153 attr
->name
= abbrev
->name
;
7154 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7157 /* read dwarf information from a buffer */
7160 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7162 return bfd_get_8 (abfd
, buf
);
7166 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7168 return bfd_get_signed_8 (abfd
, buf
);
7172 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7174 return bfd_get_16 (abfd
, buf
);
7178 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7180 return bfd_get_signed_16 (abfd
, buf
);
7184 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7186 return bfd_get_32 (abfd
, buf
);
7190 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7192 return bfd_get_signed_32 (abfd
, buf
);
7196 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7198 return bfd_get_64 (abfd
, buf
);
7202 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7203 unsigned int *bytes_read
)
7205 struct comp_unit_head
*cu_header
= &cu
->header
;
7206 CORE_ADDR retval
= 0;
7208 if (cu_header
->signed_addr_p
)
7210 switch (cu_header
->addr_size
)
7213 retval
= bfd_get_signed_16 (abfd
, buf
);
7216 retval
= bfd_get_signed_32 (abfd
, buf
);
7219 retval
= bfd_get_signed_64 (abfd
, buf
);
7222 internal_error (__FILE__
, __LINE__
,
7223 _("read_address: bad switch, signed [in module %s]"),
7224 bfd_get_filename (abfd
));
7229 switch (cu_header
->addr_size
)
7232 retval
= bfd_get_16 (abfd
, buf
);
7235 retval
= bfd_get_32 (abfd
, buf
);
7238 retval
= bfd_get_64 (abfd
, buf
);
7241 internal_error (__FILE__
, __LINE__
,
7242 _("read_address: bad switch, unsigned [in module %s]"),
7243 bfd_get_filename (abfd
));
7247 *bytes_read
= cu_header
->addr_size
;
7251 /* Read the initial length from a section. The (draft) DWARF 3
7252 specification allows the initial length to take up either 4 bytes
7253 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7254 bytes describe the length and all offsets will be 8 bytes in length
7257 An older, non-standard 64-bit format is also handled by this
7258 function. The older format in question stores the initial length
7259 as an 8-byte quantity without an escape value. Lengths greater
7260 than 2^32 aren't very common which means that the initial 4 bytes
7261 is almost always zero. Since a length value of zero doesn't make
7262 sense for the 32-bit format, this initial zero can be considered to
7263 be an escape value which indicates the presence of the older 64-bit
7264 format. As written, the code can't detect (old format) lengths
7265 greater than 4GB. If it becomes necessary to handle lengths
7266 somewhat larger than 4GB, we could allow other small values (such
7267 as the non-sensical values of 1, 2, and 3) to also be used as
7268 escape values indicating the presence of the old format.
7270 The value returned via bytes_read should be used to increment the
7271 relevant pointer after calling read_initial_length().
7273 [ Note: read_initial_length() and read_offset() are based on the
7274 document entitled "DWARF Debugging Information Format", revision
7275 3, draft 8, dated November 19, 2001. This document was obtained
7278 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7280 This document is only a draft and is subject to change. (So beware.)
7282 Details regarding the older, non-standard 64-bit format were
7283 determined empirically by examining 64-bit ELF files produced by
7284 the SGI toolchain on an IRIX 6.5 machine.
7286 - Kevin, July 16, 2002
7290 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7292 LONGEST length
= bfd_get_32 (abfd
, buf
);
7294 if (length
== 0xffffffff)
7296 length
= bfd_get_64 (abfd
, buf
+ 4);
7299 else if (length
== 0)
7301 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7302 length
= bfd_get_64 (abfd
, buf
);
7313 /* Cover function for read_initial_length.
7314 Returns the length of the object at BUF, and stores the size of the
7315 initial length in *BYTES_READ and stores the size that offsets will be in
7317 If the initial length size is not equivalent to that specified in
7318 CU_HEADER then issue a complaint.
7319 This is useful when reading non-comp-unit headers. */
7322 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7323 const struct comp_unit_head
*cu_header
,
7324 unsigned int *bytes_read
,
7325 unsigned int *offset_size
)
7327 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7329 gdb_assert (cu_header
->initial_length_size
== 4
7330 || cu_header
->initial_length_size
== 8
7331 || cu_header
->initial_length_size
== 12);
7333 if (cu_header
->initial_length_size
!= *bytes_read
)
7334 complaint (&symfile_complaints
,
7335 _("intermixed 32-bit and 64-bit DWARF sections"));
7337 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7341 /* Read an offset from the data stream. The size of the offset is
7342 given by cu_header->offset_size. */
7345 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7346 unsigned int *bytes_read
)
7348 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7349 *bytes_read
= cu_header
->offset_size
;
7353 /* Read an offset from the data stream. */
7356 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7360 switch (offset_size
)
7363 retval
= bfd_get_32 (abfd
, buf
);
7366 retval
= bfd_get_64 (abfd
, buf
);
7369 internal_error (__FILE__
, __LINE__
,
7370 _("read_offset_1: bad switch [in module %s]"),
7371 bfd_get_filename (abfd
));
7378 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7380 /* If the size of a host char is 8 bits, we can return a pointer
7381 to the buffer, otherwise we have to copy the data to a buffer
7382 allocated on the temporary obstack. */
7383 gdb_assert (HOST_CHAR_BIT
== 8);
7388 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7390 /* If the size of a host char is 8 bits, we can return a pointer
7391 to the string, otherwise we have to copy the string to a buffer
7392 allocated on the temporary obstack. */
7393 gdb_assert (HOST_CHAR_BIT
== 8);
7396 *bytes_read_ptr
= 1;
7399 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7400 return (char *) buf
;
7404 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7405 const struct comp_unit_head
*cu_header
,
7406 unsigned int *bytes_read_ptr
)
7408 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7410 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7412 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7413 bfd_get_filename (abfd
));
7416 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7418 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7419 bfd_get_filename (abfd
));
7422 gdb_assert (HOST_CHAR_BIT
== 8);
7423 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7425 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7428 static unsigned long
7429 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7431 unsigned long result
;
7432 unsigned int num_read
;
7442 byte
= bfd_get_8 (abfd
, buf
);
7445 result
|= ((unsigned long)(byte
& 127) << shift
);
7446 if ((byte
& 128) == 0)
7452 *bytes_read_ptr
= num_read
;
7457 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7460 int i
, shift
, num_read
;
7469 byte
= bfd_get_8 (abfd
, buf
);
7472 result
|= ((long)(byte
& 127) << shift
);
7474 if ((byte
& 128) == 0)
7479 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7480 result
|= -(((long)1) << shift
);
7481 *bytes_read_ptr
= num_read
;
7485 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7488 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7494 byte
= bfd_get_8 (abfd
, buf
);
7496 if ((byte
& 128) == 0)
7502 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7509 cu
->language
= language_c
;
7511 case DW_LANG_C_plus_plus
:
7512 cu
->language
= language_cplus
;
7514 case DW_LANG_Fortran77
:
7515 case DW_LANG_Fortran90
:
7516 case DW_LANG_Fortran95
:
7517 cu
->language
= language_fortran
;
7519 case DW_LANG_Mips_Assembler
:
7520 cu
->language
= language_asm
;
7523 cu
->language
= language_java
;
7527 cu
->language
= language_ada
;
7529 case DW_LANG_Modula2
:
7530 cu
->language
= language_m2
;
7532 case DW_LANG_Pascal83
:
7533 cu
->language
= language_pascal
;
7536 cu
->language
= language_objc
;
7538 case DW_LANG_Cobol74
:
7539 case DW_LANG_Cobol85
:
7541 cu
->language
= language_minimal
;
7544 cu
->language_defn
= language_def (cu
->language
);
7547 /* Return the named attribute or NULL if not there. */
7549 static struct attribute
*
7550 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7553 struct attribute
*spec
= NULL
;
7555 for (i
= 0; i
< die
->num_attrs
; ++i
)
7557 if (die
->attrs
[i
].name
== name
)
7558 return &die
->attrs
[i
];
7559 if (die
->attrs
[i
].name
== DW_AT_specification
7560 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7561 spec
= &die
->attrs
[i
];
7566 die
= follow_die_ref (die
, spec
, &cu
);
7567 return dwarf2_attr (die
, name
, cu
);
7573 /* Return the named attribute or NULL if not there,
7574 but do not follow DW_AT_specification, etc.
7575 This is for use in contexts where we're reading .debug_types dies.
7576 Following DW_AT_specification, DW_AT_abstract_origin will take us
7577 back up the chain, and we want to go down. */
7579 static struct attribute
*
7580 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7581 struct dwarf2_cu
*cu
)
7585 for (i
= 0; i
< die
->num_attrs
; ++i
)
7586 if (die
->attrs
[i
].name
== name
)
7587 return &die
->attrs
[i
];
7592 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7593 and holds a non-zero value. This function should only be used for
7594 DW_FORM_flag attributes. */
7597 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7599 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7601 return (attr
&& DW_UNSND (attr
));
7605 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7607 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7608 which value is non-zero. However, we have to be careful with
7609 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7610 (via dwarf2_flag_true_p) follows this attribute. So we may
7611 end up accidently finding a declaration attribute that belongs
7612 to a different DIE referenced by the specification attribute,
7613 even though the given DIE does not have a declaration attribute. */
7614 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7615 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7618 /* Return the die giving the specification for DIE, if there is
7619 one. *SPEC_CU is the CU containing DIE on input, and the CU
7620 containing the return value on output. If there is no
7621 specification, but there is an abstract origin, that is
7624 static struct die_info
*
7625 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7627 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7630 if (spec_attr
== NULL
)
7631 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7633 if (spec_attr
== NULL
)
7636 return follow_die_ref (die
, spec_attr
, spec_cu
);
7639 /* Free the line_header structure *LH, and any arrays and strings it
7642 free_line_header (struct line_header
*lh
)
7644 if (lh
->standard_opcode_lengths
)
7645 xfree (lh
->standard_opcode_lengths
);
7647 /* Remember that all the lh->file_names[i].name pointers are
7648 pointers into debug_line_buffer, and don't need to be freed. */
7650 xfree (lh
->file_names
);
7652 /* Similarly for the include directory names. */
7653 if (lh
->include_dirs
)
7654 xfree (lh
->include_dirs
);
7660 /* Add an entry to LH's include directory table. */
7662 add_include_dir (struct line_header
*lh
, char *include_dir
)
7664 /* Grow the array if necessary. */
7665 if (lh
->include_dirs_size
== 0)
7667 lh
->include_dirs_size
= 1; /* for testing */
7668 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7669 * sizeof (*lh
->include_dirs
));
7671 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7673 lh
->include_dirs_size
*= 2;
7674 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7675 (lh
->include_dirs_size
7676 * sizeof (*lh
->include_dirs
)));
7679 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7683 /* Add an entry to LH's file name table. */
7685 add_file_name (struct line_header
*lh
,
7687 unsigned int dir_index
,
7688 unsigned int mod_time
,
7689 unsigned int length
)
7691 struct file_entry
*fe
;
7693 /* Grow the array if necessary. */
7694 if (lh
->file_names_size
== 0)
7696 lh
->file_names_size
= 1; /* for testing */
7697 lh
->file_names
= xmalloc (lh
->file_names_size
7698 * sizeof (*lh
->file_names
));
7700 else if (lh
->num_file_names
>= lh
->file_names_size
)
7702 lh
->file_names_size
*= 2;
7703 lh
->file_names
= xrealloc (lh
->file_names
,
7704 (lh
->file_names_size
7705 * sizeof (*lh
->file_names
)));
7708 fe
= &lh
->file_names
[lh
->num_file_names
++];
7710 fe
->dir_index
= dir_index
;
7711 fe
->mod_time
= mod_time
;
7712 fe
->length
= length
;
7718 /* Read the statement program header starting at OFFSET in
7719 .debug_line, according to the endianness of ABFD. Return a pointer
7720 to a struct line_header, allocated using xmalloc.
7722 NOTE: the strings in the include directory and file name tables of
7723 the returned object point into debug_line_buffer, and must not be
7725 static struct line_header
*
7726 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7727 struct dwarf2_cu
*cu
)
7729 struct cleanup
*back_to
;
7730 struct line_header
*lh
;
7732 unsigned int bytes_read
, offset_size
;
7734 char *cur_dir
, *cur_file
;
7736 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7738 complaint (&symfile_complaints
, _("missing .debug_line section"));
7742 /* Make sure that at least there's room for the total_length field.
7743 That could be 12 bytes long, but we're just going to fudge that. */
7744 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7746 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7750 lh
= xmalloc (sizeof (*lh
));
7751 memset (lh
, 0, sizeof (*lh
));
7752 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7755 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7757 /* Read in the header. */
7759 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7760 &bytes_read
, &offset_size
);
7761 line_ptr
+= bytes_read
;
7762 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7763 + dwarf2_per_objfile
->line
.size
))
7765 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7768 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7769 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7771 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7772 line_ptr
+= offset_size
;
7773 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7775 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7777 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7779 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7781 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7783 lh
->standard_opcode_lengths
7784 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7786 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7787 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7789 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7793 /* Read directory table. */
7794 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7796 line_ptr
+= bytes_read
;
7797 add_include_dir (lh
, cur_dir
);
7799 line_ptr
+= bytes_read
;
7801 /* Read file name table. */
7802 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7804 unsigned int dir_index
, mod_time
, length
;
7806 line_ptr
+= bytes_read
;
7807 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7808 line_ptr
+= bytes_read
;
7809 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7810 line_ptr
+= bytes_read
;
7811 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7812 line_ptr
+= bytes_read
;
7814 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7816 line_ptr
+= bytes_read
;
7817 lh
->statement_program_start
= line_ptr
;
7819 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7820 + dwarf2_per_objfile
->line
.size
))
7821 complaint (&symfile_complaints
,
7822 _("line number info header doesn't fit in `.debug_line' section"));
7824 discard_cleanups (back_to
);
7828 /* This function exists to work around a bug in certain compilers
7829 (particularly GCC 2.95), in which the first line number marker of a
7830 function does not show up until after the prologue, right before
7831 the second line number marker. This function shifts ADDRESS down
7832 to the beginning of the function if necessary, and is called on
7833 addresses passed to record_line. */
7836 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7838 struct function_range
*fn
;
7840 /* Find the function_range containing address. */
7845 cu
->cached_fn
= cu
->first_fn
;
7849 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7855 while (fn
&& fn
!= cu
->cached_fn
)
7856 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7866 if (address
!= fn
->lowpc
)
7867 complaint (&symfile_complaints
,
7868 _("misplaced first line number at 0x%lx for '%s'"),
7869 (unsigned long) address
, fn
->name
);
7874 /* Decode the Line Number Program (LNP) for the given line_header
7875 structure and CU. The actual information extracted and the type
7876 of structures created from the LNP depends on the value of PST.
7878 1. If PST is NULL, then this procedure uses the data from the program
7879 to create all necessary symbol tables, and their linetables.
7880 The compilation directory of the file is passed in COMP_DIR,
7881 and must not be NULL.
7883 2. If PST is not NULL, this procedure reads the program to determine
7884 the list of files included by the unit represented by PST, and
7885 builds all the associated partial symbol tables. In this case,
7886 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7887 is not used to compute the full name of the symtab, and therefore
7888 omitting it when building the partial symtab does not introduce
7889 the potential for inconsistency - a partial symtab and its associated
7890 symbtab having a different fullname -). */
7893 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7894 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7896 gdb_byte
*line_ptr
, *extended_end
;
7898 unsigned int bytes_read
, extended_len
;
7899 unsigned char op_code
, extended_op
, adj_opcode
;
7901 struct objfile
*objfile
= cu
->objfile
;
7902 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7903 const int decode_for_pst_p
= (pst
!= NULL
);
7904 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7906 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7908 line_ptr
= lh
->statement_program_start
;
7909 line_end
= lh
->statement_program_end
;
7911 /* Read the statement sequences until there's nothing left. */
7912 while (line_ptr
< line_end
)
7914 /* state machine registers */
7915 CORE_ADDR address
= 0;
7916 unsigned int file
= 1;
7917 unsigned int line
= 1;
7918 unsigned int column
= 0;
7919 int is_stmt
= lh
->default_is_stmt
;
7920 int basic_block
= 0;
7921 int end_sequence
= 0;
7924 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7926 /* Start a subfile for the current file of the state machine. */
7927 /* lh->include_dirs and lh->file_names are 0-based, but the
7928 directory and file name numbers in the statement program
7930 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7934 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7936 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7939 /* Decode the table. */
7940 while (!end_sequence
)
7942 op_code
= read_1_byte (abfd
, line_ptr
);
7944 if (line_ptr
> line_end
)
7946 dwarf2_debug_line_missing_end_sequence_complaint ();
7950 if (op_code
>= lh
->opcode_base
)
7952 /* Special operand. */
7953 adj_opcode
= op_code
- lh
->opcode_base
;
7954 address
+= (adj_opcode
/ lh
->line_range
)
7955 * lh
->minimum_instruction_length
;
7956 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7957 if (lh
->num_file_names
< file
|| file
== 0)
7958 dwarf2_debug_line_missing_file_complaint ();
7961 lh
->file_names
[file
- 1].included_p
= 1;
7962 if (!decode_for_pst_p
&& is_stmt
)
7964 if (last_subfile
!= current_subfile
)
7966 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7968 record_line (last_subfile
, 0, addr
);
7969 last_subfile
= current_subfile
;
7971 /* Append row to matrix using current values. */
7972 addr
= check_cu_functions (address
, cu
);
7973 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7974 record_line (current_subfile
, line
, addr
);
7979 else switch (op_code
)
7981 case DW_LNS_extended_op
:
7982 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7983 line_ptr
+= bytes_read
;
7984 extended_end
= line_ptr
+ extended_len
;
7985 extended_op
= read_1_byte (abfd
, line_ptr
);
7987 switch (extended_op
)
7989 case DW_LNE_end_sequence
:
7992 case DW_LNE_set_address
:
7993 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7994 line_ptr
+= bytes_read
;
7995 address
+= baseaddr
;
7997 case DW_LNE_define_file
:
8000 unsigned int dir_index
, mod_time
, length
;
8002 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8003 line_ptr
+= bytes_read
;
8005 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8006 line_ptr
+= bytes_read
;
8008 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8009 line_ptr
+= bytes_read
;
8011 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8012 line_ptr
+= bytes_read
;
8013 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8016 case DW_LNE_set_discriminator
:
8017 /* The discriminator is not interesting to the debugger;
8019 line_ptr
= extended_end
;
8022 complaint (&symfile_complaints
,
8023 _("mangled .debug_line section"));
8026 /* Make sure that we parsed the extended op correctly. If e.g.
8027 we expected a different address size than the producer used,
8028 we may have read the wrong number of bytes. */
8029 if (line_ptr
!= extended_end
)
8031 complaint (&symfile_complaints
,
8032 _("mangled .debug_line section"));
8037 if (lh
->num_file_names
< file
|| file
== 0)
8038 dwarf2_debug_line_missing_file_complaint ();
8041 lh
->file_names
[file
- 1].included_p
= 1;
8042 if (!decode_for_pst_p
&& is_stmt
)
8044 if (last_subfile
!= current_subfile
)
8046 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8048 record_line (last_subfile
, 0, addr
);
8049 last_subfile
= current_subfile
;
8051 addr
= check_cu_functions (address
, cu
);
8052 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8053 record_line (current_subfile
, line
, addr
);
8058 case DW_LNS_advance_pc
:
8059 address
+= lh
->minimum_instruction_length
8060 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8061 line_ptr
+= bytes_read
;
8063 case DW_LNS_advance_line
:
8064 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8065 line_ptr
+= bytes_read
;
8067 case DW_LNS_set_file
:
8069 /* The arrays lh->include_dirs and lh->file_names are
8070 0-based, but the directory and file name numbers in
8071 the statement program are 1-based. */
8072 struct file_entry
*fe
;
8075 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8076 line_ptr
+= bytes_read
;
8077 if (lh
->num_file_names
< file
|| file
== 0)
8078 dwarf2_debug_line_missing_file_complaint ();
8081 fe
= &lh
->file_names
[file
- 1];
8083 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8084 if (!decode_for_pst_p
)
8086 last_subfile
= current_subfile
;
8087 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8092 case DW_LNS_set_column
:
8093 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8094 line_ptr
+= bytes_read
;
8096 case DW_LNS_negate_stmt
:
8097 is_stmt
= (!is_stmt
);
8099 case DW_LNS_set_basic_block
:
8102 /* Add to the address register of the state machine the
8103 address increment value corresponding to special opcode
8104 255. I.e., this value is scaled by the minimum
8105 instruction length since special opcode 255 would have
8106 scaled the the increment. */
8107 case DW_LNS_const_add_pc
:
8108 address
+= (lh
->minimum_instruction_length
8109 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8111 case DW_LNS_fixed_advance_pc
:
8112 address
+= read_2_bytes (abfd
, line_ptr
);
8117 /* Unknown standard opcode, ignore it. */
8120 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8122 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8123 line_ptr
+= bytes_read
;
8128 if (lh
->num_file_names
< file
|| file
== 0)
8129 dwarf2_debug_line_missing_file_complaint ();
8132 lh
->file_names
[file
- 1].included_p
= 1;
8133 if (!decode_for_pst_p
)
8135 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8136 record_line (current_subfile
, 0, addr
);
8141 if (decode_for_pst_p
)
8145 /* Now that we're done scanning the Line Header Program, we can
8146 create the psymtab of each included file. */
8147 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8148 if (lh
->file_names
[file_index
].included_p
== 1)
8150 const struct file_entry fe
= lh
->file_names
[file_index
];
8151 char *include_name
= fe
.name
;
8152 char *dir_name
= NULL
;
8153 char *pst_filename
= pst
->filename
;
8156 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8158 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8160 include_name
= concat (dir_name
, SLASH_STRING
,
8161 include_name
, (char *)NULL
);
8162 make_cleanup (xfree
, include_name
);
8165 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8167 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8168 pst_filename
, (char *)NULL
);
8169 make_cleanup (xfree
, pst_filename
);
8172 if (strcmp (include_name
, pst_filename
) != 0)
8173 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8178 /* Make sure a symtab is created for every file, even files
8179 which contain only variables (i.e. no code with associated
8183 struct file_entry
*fe
;
8185 for (i
= 0; i
< lh
->num_file_names
; i
++)
8188 fe
= &lh
->file_names
[i
];
8190 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8191 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8193 /* Skip the main file; we don't need it, and it must be
8194 allocated last, so that it will show up before the
8195 non-primary symtabs in the objfile's symtab list. */
8196 if (current_subfile
== first_subfile
)
8199 if (current_subfile
->symtab
== NULL
)
8200 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8202 fe
->symtab
= current_subfile
->symtab
;
8207 /* Start a subfile for DWARF. FILENAME is the name of the file and
8208 DIRNAME the name of the source directory which contains FILENAME
8209 or NULL if not known. COMP_DIR is the compilation directory for the
8210 linetable's compilation unit or NULL if not known.
8211 This routine tries to keep line numbers from identical absolute and
8212 relative file names in a common subfile.
8214 Using the `list' example from the GDB testsuite, which resides in
8215 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8216 of /srcdir/list0.c yields the following debugging information for list0.c:
8218 DW_AT_name: /srcdir/list0.c
8219 DW_AT_comp_dir: /compdir
8220 files.files[0].name: list0.h
8221 files.files[0].dir: /srcdir
8222 files.files[1].name: list0.c
8223 files.files[1].dir: /srcdir
8225 The line number information for list0.c has to end up in a single
8226 subfile, so that `break /srcdir/list0.c:1' works as expected.
8227 start_subfile will ensure that this happens provided that we pass the
8228 concatenation of files.files[1].dir and files.files[1].name as the
8232 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8236 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8237 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8238 second argument to start_subfile. To be consistent, we do the
8239 same here. In order not to lose the line information directory,
8240 we concatenate it to the filename when it makes sense.
8241 Note that the Dwarf3 standard says (speaking of filenames in line
8242 information): ``The directory index is ignored for file names
8243 that represent full path names''. Thus ignoring dirname in the
8244 `else' branch below isn't an issue. */
8246 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8247 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8249 fullname
= filename
;
8251 start_subfile (fullname
, comp_dir
);
8253 if (fullname
!= filename
)
8258 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8259 struct dwarf2_cu
*cu
)
8261 struct objfile
*objfile
= cu
->objfile
;
8262 struct comp_unit_head
*cu_header
= &cu
->header
;
8264 /* NOTE drow/2003-01-30: There used to be a comment and some special
8265 code here to turn a symbol with DW_AT_external and a
8266 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8267 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8268 with some versions of binutils) where shared libraries could have
8269 relocations against symbols in their debug information - the
8270 minimal symbol would have the right address, but the debug info
8271 would not. It's no longer necessary, because we will explicitly
8272 apply relocations when we read in the debug information now. */
8274 /* A DW_AT_location attribute with no contents indicates that a
8275 variable has been optimized away. */
8276 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8278 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8282 /* Handle one degenerate form of location expression specially, to
8283 preserve GDB's previous behavior when section offsets are
8284 specified. If this is just a DW_OP_addr then mark this symbol
8287 if (attr_form_is_block (attr
)
8288 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8289 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8293 SYMBOL_VALUE_ADDRESS (sym
) =
8294 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8295 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8296 fixup_symbol_section (sym
, objfile
);
8297 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8298 SYMBOL_SECTION (sym
));
8302 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8303 expression evaluator, and use LOC_COMPUTED only when necessary
8304 (i.e. when the value of a register or memory location is
8305 referenced, or a thread-local block, etc.). Then again, it might
8306 not be worthwhile. I'm assuming that it isn't unless performance
8307 or memory numbers show me otherwise. */
8309 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8310 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8313 /* Given a pointer to a DWARF information entry, figure out if we need
8314 to make a symbol table entry for it, and if so, create a new entry
8315 and return a pointer to it.
8316 If TYPE is NULL, determine symbol type from the die, otherwise
8317 used the passed type. */
8319 static struct symbol
*
8320 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8322 struct objfile
*objfile
= cu
->objfile
;
8323 struct symbol
*sym
= NULL
;
8325 struct attribute
*attr
= NULL
;
8326 struct attribute
*attr2
= NULL
;
8328 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8330 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8332 if (die
->tag
!= DW_TAG_namespace
)
8333 name
= dwarf2_linkage_name (die
, cu
);
8335 name
= TYPE_NAME (type
);
8339 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8340 sizeof (struct symbol
));
8341 OBJSTAT (objfile
, n_syms
++);
8342 memset (sym
, 0, sizeof (struct symbol
));
8344 /* Cache this symbol's name and the name's demangled form (if any). */
8345 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8346 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 0, objfile
);
8348 /* Default assumptions.
8349 Use the passed type or decode it from the die. */
8350 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8351 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8353 SYMBOL_TYPE (sym
) = type
;
8355 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8356 attr
= dwarf2_attr (die
,
8357 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8361 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8364 attr
= dwarf2_attr (die
,
8365 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8369 int file_index
= DW_UNSND (attr
);
8370 if (cu
->line_header
== NULL
8371 || file_index
> cu
->line_header
->num_file_names
)
8372 complaint (&symfile_complaints
,
8373 _("file index out of range"));
8374 else if (file_index
> 0)
8376 struct file_entry
*fe
;
8377 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8378 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8385 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8388 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8390 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8392 case DW_TAG_subprogram
:
8393 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8395 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8396 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8397 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8398 || cu
->language
== language_ada
)
8400 /* Subprograms marked external are stored as a global symbol.
8401 Ada subprograms, whether marked external or not, are always
8402 stored as a global symbol, because we want to be able to
8403 access them globally. For instance, we want to be able
8404 to break on a nested subprogram without having to
8405 specify the context. */
8406 add_symbol_to_list (sym
, &global_symbols
);
8410 add_symbol_to_list (sym
, cu
->list_in_scope
);
8413 case DW_TAG_inlined_subroutine
:
8414 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8416 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8417 SYMBOL_INLINED (sym
) = 1;
8418 /* Do not add the symbol to any lists. It will be found via
8419 BLOCK_FUNCTION from the blockvector. */
8421 case DW_TAG_variable
:
8422 /* Compilation with minimal debug info may result in variables
8423 with missing type entries. Change the misleading `void' type
8424 to something sensible. */
8425 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8427 = objfile_type (objfile
)->nodebug_data_symbol
;
8429 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8432 dwarf2_const_value (attr
, sym
, cu
);
8433 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8434 if (attr2
&& (DW_UNSND (attr2
) != 0))
8435 add_symbol_to_list (sym
, &global_symbols
);
8437 add_symbol_to_list (sym
, cu
->list_in_scope
);
8440 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8443 var_decode_location (attr
, sym
, cu
);
8444 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8445 if (attr2
&& (DW_UNSND (attr2
) != 0))
8446 add_symbol_to_list (sym
, &global_symbols
);
8448 add_symbol_to_list (sym
, cu
->list_in_scope
);
8452 /* We do not know the address of this symbol.
8453 If it is an external symbol and we have type information
8454 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8455 The address of the variable will then be determined from
8456 the minimal symbol table whenever the variable is
8458 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8459 if (attr2
&& (DW_UNSND (attr2
) != 0)
8460 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8462 struct pending
**list_to_add
;
8464 /* A variable with DW_AT_external is never static, but it
8465 may be block-scoped. */
8466 list_to_add
= (cu
->list_in_scope
== &file_symbols
8467 ? &global_symbols
: cu
->list_in_scope
);
8469 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8470 add_symbol_to_list (sym
, list_to_add
);
8472 else if (!die_is_declaration (die
, cu
))
8474 /* Use the default LOC_OPTIMIZED_OUT class. */
8475 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8476 add_symbol_to_list (sym
, cu
->list_in_scope
);
8480 case DW_TAG_formal_parameter
:
8481 /* If we are inside a function, mark this as an argument. If
8482 not, we might be looking at an argument to an inlined function
8483 when we do not have enough information to show inlined frames;
8484 pretend it's a local variable in that case so that the user can
8486 if (context_stack_depth
> 0
8487 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8488 SYMBOL_IS_ARGUMENT (sym
) = 1;
8489 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8492 var_decode_location (attr
, sym
, cu
);
8494 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8497 dwarf2_const_value (attr
, sym
, cu
);
8499 add_symbol_to_list (sym
, cu
->list_in_scope
);
8501 case DW_TAG_unspecified_parameters
:
8502 /* From varargs functions; gdb doesn't seem to have any
8503 interest in this information, so just ignore it for now.
8506 case DW_TAG_class_type
:
8507 case DW_TAG_interface_type
:
8508 case DW_TAG_structure_type
:
8509 case DW_TAG_union_type
:
8510 case DW_TAG_set_type
:
8511 case DW_TAG_enumeration_type
:
8512 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8513 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8515 /* Make sure that the symbol includes appropriate enclosing
8516 classes/namespaces in its name. These are calculated in
8517 read_structure_type, and the correct name is saved in
8520 if (cu
->language
== language_cplus
8521 || cu
->language
== language_java
)
8523 struct type
*type
= SYMBOL_TYPE (sym
);
8525 if (TYPE_TAG_NAME (type
) != NULL
)
8527 /* FIXME: carlton/2003-11-10: Should this use
8528 SYMBOL_SET_NAMES instead? (The same problem also
8529 arises further down in this function.) */
8530 /* The type's name is already allocated along with
8531 this objfile, so we don't need to duplicate it
8533 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8538 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8539 really ever be static objects: otherwise, if you try
8540 to, say, break of a class's method and you're in a file
8541 which doesn't mention that class, it won't work unless
8542 the check for all static symbols in lookup_symbol_aux
8543 saves you. See the OtherFileClass tests in
8544 gdb.c++/namespace.exp. */
8546 struct pending
**list_to_add
;
8548 list_to_add
= (cu
->list_in_scope
== &file_symbols
8549 && (cu
->language
== language_cplus
8550 || cu
->language
== language_java
)
8551 ? &global_symbols
: cu
->list_in_scope
);
8553 add_symbol_to_list (sym
, list_to_add
);
8555 /* The semantics of C++ state that "struct foo { ... }" also
8556 defines a typedef for "foo". A Java class declaration also
8557 defines a typedef for the class. */
8558 if (cu
->language
== language_cplus
8559 || cu
->language
== language_java
8560 || cu
->language
== language_ada
)
8562 /* The symbol's name is already allocated along with
8563 this objfile, so we don't need to duplicate it for
8565 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8566 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8570 case DW_TAG_typedef
:
8571 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8572 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8573 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8574 add_symbol_to_list (sym
, cu
->list_in_scope
);
8576 case DW_TAG_base_type
:
8577 case DW_TAG_subrange_type
:
8578 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8579 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8580 add_symbol_to_list (sym
, cu
->list_in_scope
);
8582 case DW_TAG_enumerator
:
8583 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8584 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8587 dwarf2_const_value (attr
, sym
, cu
);
8590 /* NOTE: carlton/2003-11-10: See comment above in the
8591 DW_TAG_class_type, etc. block. */
8593 struct pending
**list_to_add
;
8595 list_to_add
= (cu
->list_in_scope
== &file_symbols
8596 && (cu
->language
== language_cplus
8597 || cu
->language
== language_java
)
8598 ? &global_symbols
: cu
->list_in_scope
);
8600 add_symbol_to_list (sym
, list_to_add
);
8603 case DW_TAG_namespace
:
8604 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8605 add_symbol_to_list (sym
, &global_symbols
);
8608 /* Not a tag we recognize. Hopefully we aren't processing
8609 trash data, but since we must specifically ignore things
8610 we don't recognize, there is nothing else we should do at
8612 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8613 dwarf_tag_name (die
->tag
));
8617 /* For the benefit of old versions of GCC, check for anonymous
8618 namespaces based on the demangled name. */
8619 if (!processing_has_namespace_info
8620 && cu
->language
== language_cplus
8621 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8622 cp_scan_for_anonymous_namespaces (sym
);
8627 /* Copy constant value from an attribute to a symbol. */
8630 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8631 struct dwarf2_cu
*cu
)
8633 struct objfile
*objfile
= cu
->objfile
;
8634 struct comp_unit_head
*cu_header
= &cu
->header
;
8635 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8636 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8637 struct dwarf_block
*blk
;
8642 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8643 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8644 cu_header
->addr_size
,
8645 TYPE_LENGTH (SYMBOL_TYPE
8647 SYMBOL_VALUE_BYTES (sym
) =
8648 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8649 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8650 it's body - store_unsigned_integer. */
8651 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8652 byte_order
, DW_ADDR (attr
));
8653 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8655 case DW_FORM_string
:
8657 /* DW_STRING is already allocated on the obstack, point directly
8659 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8660 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8662 case DW_FORM_block1
:
8663 case DW_FORM_block2
:
8664 case DW_FORM_block4
:
8666 blk
= DW_BLOCK (attr
);
8667 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8668 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8670 TYPE_LENGTH (SYMBOL_TYPE
8672 SYMBOL_VALUE_BYTES (sym
) =
8673 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8674 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8675 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8678 /* The DW_AT_const_value attributes are supposed to carry the
8679 symbol's value "represented as it would be on the target
8680 architecture." By the time we get here, it's already been
8681 converted to host endianness, so we just need to sign- or
8682 zero-extend it as appropriate. */
8684 dwarf2_const_value_data (attr
, sym
, 8);
8687 dwarf2_const_value_data (attr
, sym
, 16);
8690 dwarf2_const_value_data (attr
, sym
, 32);
8693 dwarf2_const_value_data (attr
, sym
, 64);
8697 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8698 SYMBOL_CLASS (sym
) = LOC_CONST
;
8702 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8703 SYMBOL_CLASS (sym
) = LOC_CONST
;
8707 complaint (&symfile_complaints
,
8708 _("unsupported const value attribute form: '%s'"),
8709 dwarf_form_name (attr
->form
));
8710 SYMBOL_VALUE (sym
) = 0;
8711 SYMBOL_CLASS (sym
) = LOC_CONST
;
8717 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8718 or zero-extend it as appropriate for the symbol's type. */
8720 dwarf2_const_value_data (struct attribute
*attr
,
8724 LONGEST l
= DW_UNSND (attr
);
8726 if (bits
< sizeof (l
) * 8)
8728 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8729 l
&= ((LONGEST
) 1 << bits
) - 1;
8731 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8734 SYMBOL_VALUE (sym
) = l
;
8735 SYMBOL_CLASS (sym
) = LOC_CONST
;
8739 /* Return the type of the die in question using its DW_AT_type attribute. */
8741 static struct type
*
8742 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8745 struct attribute
*type_attr
;
8746 struct die_info
*type_die
;
8748 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8751 /* A missing DW_AT_type represents a void type. */
8752 return objfile_type (cu
->objfile
)->builtin_void
;
8755 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8757 type
= tag_type_to_type (type_die
, cu
);
8760 dump_die_for_error (type_die
);
8761 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8767 /* True iff CU's producer generates GNAT Ada auxiliary information
8768 that allows to find parallel types through that information instead
8769 of having to do expensive parallel lookups by type name. */
8772 need_gnat_info (struct dwarf2_cu
*cu
)
8774 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8775 of GNAT produces this auxiliary information, without any indication
8776 that it is produced. Part of enhancing the FSF version of GNAT
8777 to produce that information will be to put in place an indicator
8778 that we can use in order to determine whether the descriptive type
8779 info is available or not. One suggestion that has been made is
8780 to use a new attribute, attached to the CU die. For now, assume
8781 that the descriptive type info is not available. */
8786 /* Return the auxiliary type of the die in question using its
8787 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8788 attribute is not present. */
8790 static struct type
*
8791 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8794 struct attribute
*type_attr
;
8795 struct die_info
*type_die
;
8797 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
8801 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8802 type
= tag_type_to_type (type_die
, cu
);
8805 dump_die_for_error (type_die
);
8806 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8812 /* If DIE has a descriptive_type attribute, then set the TYPE's
8813 descriptive type accordingly. */
8816 set_descriptive_type (struct type
*type
, struct die_info
*die
,
8817 struct dwarf2_cu
*cu
)
8819 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
8821 if (descriptive_type
)
8823 ALLOCATE_GNAT_AUX_TYPE (type
);
8824 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
8828 /* Return the containing type of the die in question using its
8829 DW_AT_containing_type attribute. */
8831 static struct type
*
8832 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8834 struct type
*type
= NULL
;
8835 struct attribute
*type_attr
;
8836 struct die_info
*type_die
= NULL
;
8838 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8841 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8842 type
= tag_type_to_type (type_die
, cu
);
8847 dump_die_for_error (type_die
);
8848 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8854 static struct type
*
8855 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8857 struct type
*this_type
;
8859 this_type
= read_type_die (die
, cu
);
8862 dump_die_for_error (die
);
8863 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8869 static struct type
*
8870 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8872 struct type
*this_type
;
8874 this_type
= get_die_type (die
, cu
);
8880 case DW_TAG_class_type
:
8881 case DW_TAG_interface_type
:
8882 case DW_TAG_structure_type
:
8883 case DW_TAG_union_type
:
8884 this_type
= read_structure_type (die
, cu
);
8886 case DW_TAG_enumeration_type
:
8887 this_type
= read_enumeration_type (die
, cu
);
8889 case DW_TAG_subprogram
:
8890 case DW_TAG_subroutine_type
:
8891 case DW_TAG_inlined_subroutine
:
8892 this_type
= read_subroutine_type (die
, cu
);
8894 case DW_TAG_array_type
:
8895 this_type
= read_array_type (die
, cu
);
8897 case DW_TAG_set_type
:
8898 this_type
= read_set_type (die
, cu
);
8900 case DW_TAG_pointer_type
:
8901 this_type
= read_tag_pointer_type (die
, cu
);
8903 case DW_TAG_ptr_to_member_type
:
8904 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8906 case DW_TAG_reference_type
:
8907 this_type
= read_tag_reference_type (die
, cu
);
8909 case DW_TAG_const_type
:
8910 this_type
= read_tag_const_type (die
, cu
);
8912 case DW_TAG_volatile_type
:
8913 this_type
= read_tag_volatile_type (die
, cu
);
8915 case DW_TAG_string_type
:
8916 this_type
= read_tag_string_type (die
, cu
);
8918 case DW_TAG_typedef
:
8919 this_type
= read_typedef (die
, cu
);
8921 case DW_TAG_subrange_type
:
8922 this_type
= read_subrange_type (die
, cu
);
8924 case DW_TAG_base_type
:
8925 this_type
= read_base_type (die
, cu
);
8927 case DW_TAG_unspecified_type
:
8928 this_type
= read_unspecified_type (die
, cu
);
8930 case DW_TAG_namespace
:
8931 this_type
= read_namespace_type (die
, cu
);
8934 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8935 dwarf_tag_name (die
->tag
));
8942 /* Return the name of the namespace/class that DIE is defined within,
8943 or "" if we can't tell. The caller should not xfree the result.
8945 For example, if we're within the method foo() in the following
8955 then determine_prefix on foo's die will return "N::C". */
8958 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8960 struct die_info
*parent
, *spec_die
;
8961 struct dwarf2_cu
*spec_cu
;
8962 struct type
*parent_type
;
8964 if (cu
->language
!= language_cplus
8965 && cu
->language
!= language_java
)
8968 /* We have to be careful in the presence of DW_AT_specification.
8969 For example, with GCC 3.4, given the code
8973 // Definition of N::foo.
8977 then we'll have a tree of DIEs like this:
8979 1: DW_TAG_compile_unit
8980 2: DW_TAG_namespace // N
8981 3: DW_TAG_subprogram // declaration of N::foo
8982 4: DW_TAG_subprogram // definition of N::foo
8983 DW_AT_specification // refers to die #3
8985 Thus, when processing die #4, we have to pretend that we're in
8986 the context of its DW_AT_specification, namely the contex of die
8989 spec_die
= die_specification (die
, &spec_cu
);
8990 if (spec_die
== NULL
)
8991 parent
= die
->parent
;
8994 parent
= spec_die
->parent
;
9001 switch (parent
->tag
)
9003 case DW_TAG_namespace
:
9004 parent_type
= read_type_die (parent
, cu
);
9005 /* We give a name to even anonymous namespaces. */
9006 return TYPE_TAG_NAME (parent_type
);
9007 case DW_TAG_class_type
:
9008 case DW_TAG_interface_type
:
9009 case DW_TAG_structure_type
:
9010 case DW_TAG_union_type
:
9011 parent_type
= read_type_die (parent
, cu
);
9012 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9013 return TYPE_TAG_NAME (parent_type
);
9015 /* An anonymous structure is only allowed non-static data
9016 members; no typedefs, no member functions, et cetera.
9017 So it does not need a prefix. */
9020 return determine_prefix (parent
, cu
);
9024 /* Return a newly-allocated string formed by concatenating PREFIX and
9025 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9026 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9027 perform an obconcat, otherwise allocate storage for the result. The CU argument
9028 is used to determine the language and hence, the appropriate separator. */
9030 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9033 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9034 struct dwarf2_cu
*cu
)
9038 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9040 else if (cu
->language
== language_java
)
9052 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9053 strcpy (retval
, prefix
);
9054 strcat (retval
, sep
);
9055 strcat (retval
, suffix
);
9060 /* We have an obstack. */
9061 return obconcat (obs
, prefix
, sep
, suffix
);
9065 /* Return sibling of die, NULL if no sibling. */
9067 static struct die_info
*
9068 sibling_die (struct die_info
*die
)
9070 return die
->sibling
;
9073 /* Get linkage name of a die, return NULL if not found. */
9076 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9078 struct attribute
*attr
;
9080 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9081 if (attr
&& DW_STRING (attr
))
9082 return DW_STRING (attr
);
9083 return dwarf2_name (die
, cu
);
9086 /* Get name of a die, return NULL if not found. */
9089 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9090 struct obstack
*obstack
)
9092 if (name
&& cu
->language
== language_cplus
)
9094 char *canon_name
= cp_canonicalize_string (name
);
9096 if (canon_name
!= NULL
)
9098 if (strcmp (canon_name
, name
) != 0)
9099 name
= obsavestring (canon_name
, strlen (canon_name
),
9108 /* Get name of a die, return NULL if not found. */
9111 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9113 struct attribute
*attr
;
9115 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9116 if (!attr
|| !DW_STRING (attr
))
9121 case DW_TAG_compile_unit
:
9122 /* Compilation units have a DW_AT_name that is a filename, not
9123 a source language identifier. */
9124 case DW_TAG_enumeration_type
:
9125 case DW_TAG_enumerator
:
9126 /* These tags always have simple identifiers already; no need
9127 to canonicalize them. */
9128 return DW_STRING (attr
);
9130 if (!DW_STRING_IS_CANONICAL (attr
))
9133 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9134 &cu
->objfile
->objfile_obstack
);
9135 DW_STRING_IS_CANONICAL (attr
) = 1;
9137 return DW_STRING (attr
);
9141 /* Return the die that this die in an extension of, or NULL if there
9142 is none. *EXT_CU is the CU containing DIE on input, and the CU
9143 containing the return value on output. */
9145 static struct die_info
*
9146 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9148 struct attribute
*attr
;
9150 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9154 return follow_die_ref (die
, attr
, ext_cu
);
9157 /* Convert a DIE tag into its string name. */
9160 dwarf_tag_name (unsigned tag
)
9164 case DW_TAG_padding
:
9165 return "DW_TAG_padding";
9166 case DW_TAG_array_type
:
9167 return "DW_TAG_array_type";
9168 case DW_TAG_class_type
:
9169 return "DW_TAG_class_type";
9170 case DW_TAG_entry_point
:
9171 return "DW_TAG_entry_point";
9172 case DW_TAG_enumeration_type
:
9173 return "DW_TAG_enumeration_type";
9174 case DW_TAG_formal_parameter
:
9175 return "DW_TAG_formal_parameter";
9176 case DW_TAG_imported_declaration
:
9177 return "DW_TAG_imported_declaration";
9179 return "DW_TAG_label";
9180 case DW_TAG_lexical_block
:
9181 return "DW_TAG_lexical_block";
9183 return "DW_TAG_member";
9184 case DW_TAG_pointer_type
:
9185 return "DW_TAG_pointer_type";
9186 case DW_TAG_reference_type
:
9187 return "DW_TAG_reference_type";
9188 case DW_TAG_compile_unit
:
9189 return "DW_TAG_compile_unit";
9190 case DW_TAG_string_type
:
9191 return "DW_TAG_string_type";
9192 case DW_TAG_structure_type
:
9193 return "DW_TAG_structure_type";
9194 case DW_TAG_subroutine_type
:
9195 return "DW_TAG_subroutine_type";
9196 case DW_TAG_typedef
:
9197 return "DW_TAG_typedef";
9198 case DW_TAG_union_type
:
9199 return "DW_TAG_union_type";
9200 case DW_TAG_unspecified_parameters
:
9201 return "DW_TAG_unspecified_parameters";
9202 case DW_TAG_variant
:
9203 return "DW_TAG_variant";
9204 case DW_TAG_common_block
:
9205 return "DW_TAG_common_block";
9206 case DW_TAG_common_inclusion
:
9207 return "DW_TAG_common_inclusion";
9208 case DW_TAG_inheritance
:
9209 return "DW_TAG_inheritance";
9210 case DW_TAG_inlined_subroutine
:
9211 return "DW_TAG_inlined_subroutine";
9213 return "DW_TAG_module";
9214 case DW_TAG_ptr_to_member_type
:
9215 return "DW_TAG_ptr_to_member_type";
9216 case DW_TAG_set_type
:
9217 return "DW_TAG_set_type";
9218 case DW_TAG_subrange_type
:
9219 return "DW_TAG_subrange_type";
9220 case DW_TAG_with_stmt
:
9221 return "DW_TAG_with_stmt";
9222 case DW_TAG_access_declaration
:
9223 return "DW_TAG_access_declaration";
9224 case DW_TAG_base_type
:
9225 return "DW_TAG_base_type";
9226 case DW_TAG_catch_block
:
9227 return "DW_TAG_catch_block";
9228 case DW_TAG_const_type
:
9229 return "DW_TAG_const_type";
9230 case DW_TAG_constant
:
9231 return "DW_TAG_constant";
9232 case DW_TAG_enumerator
:
9233 return "DW_TAG_enumerator";
9234 case DW_TAG_file_type
:
9235 return "DW_TAG_file_type";
9237 return "DW_TAG_friend";
9238 case DW_TAG_namelist
:
9239 return "DW_TAG_namelist";
9240 case DW_TAG_namelist_item
:
9241 return "DW_TAG_namelist_item";
9242 case DW_TAG_packed_type
:
9243 return "DW_TAG_packed_type";
9244 case DW_TAG_subprogram
:
9245 return "DW_TAG_subprogram";
9246 case DW_TAG_template_type_param
:
9247 return "DW_TAG_template_type_param";
9248 case DW_TAG_template_value_param
:
9249 return "DW_TAG_template_value_param";
9250 case DW_TAG_thrown_type
:
9251 return "DW_TAG_thrown_type";
9252 case DW_TAG_try_block
:
9253 return "DW_TAG_try_block";
9254 case DW_TAG_variant_part
:
9255 return "DW_TAG_variant_part";
9256 case DW_TAG_variable
:
9257 return "DW_TAG_variable";
9258 case DW_TAG_volatile_type
:
9259 return "DW_TAG_volatile_type";
9260 case DW_TAG_dwarf_procedure
:
9261 return "DW_TAG_dwarf_procedure";
9262 case DW_TAG_restrict_type
:
9263 return "DW_TAG_restrict_type";
9264 case DW_TAG_interface_type
:
9265 return "DW_TAG_interface_type";
9266 case DW_TAG_namespace
:
9267 return "DW_TAG_namespace";
9268 case DW_TAG_imported_module
:
9269 return "DW_TAG_imported_module";
9270 case DW_TAG_unspecified_type
:
9271 return "DW_TAG_unspecified_type";
9272 case DW_TAG_partial_unit
:
9273 return "DW_TAG_partial_unit";
9274 case DW_TAG_imported_unit
:
9275 return "DW_TAG_imported_unit";
9276 case DW_TAG_condition
:
9277 return "DW_TAG_condition";
9278 case DW_TAG_shared_type
:
9279 return "DW_TAG_shared_type";
9280 case DW_TAG_type_unit
:
9281 return "DW_TAG_type_unit";
9282 case DW_TAG_MIPS_loop
:
9283 return "DW_TAG_MIPS_loop";
9284 case DW_TAG_HP_array_descriptor
:
9285 return "DW_TAG_HP_array_descriptor";
9286 case DW_TAG_format_label
:
9287 return "DW_TAG_format_label";
9288 case DW_TAG_function_template
:
9289 return "DW_TAG_function_template";
9290 case DW_TAG_class_template
:
9291 return "DW_TAG_class_template";
9292 case DW_TAG_GNU_BINCL
:
9293 return "DW_TAG_GNU_BINCL";
9294 case DW_TAG_GNU_EINCL
:
9295 return "DW_TAG_GNU_EINCL";
9296 case DW_TAG_upc_shared_type
:
9297 return "DW_TAG_upc_shared_type";
9298 case DW_TAG_upc_strict_type
:
9299 return "DW_TAG_upc_strict_type";
9300 case DW_TAG_upc_relaxed_type
:
9301 return "DW_TAG_upc_relaxed_type";
9302 case DW_TAG_PGI_kanji_type
:
9303 return "DW_TAG_PGI_kanji_type";
9304 case DW_TAG_PGI_interface_block
:
9305 return "DW_TAG_PGI_interface_block";
9307 return "DW_TAG_<unknown>";
9311 /* Convert a DWARF attribute code into its string name. */
9314 dwarf_attr_name (unsigned attr
)
9319 return "DW_AT_sibling";
9320 case DW_AT_location
:
9321 return "DW_AT_location";
9323 return "DW_AT_name";
9324 case DW_AT_ordering
:
9325 return "DW_AT_ordering";
9326 case DW_AT_subscr_data
:
9327 return "DW_AT_subscr_data";
9328 case DW_AT_byte_size
:
9329 return "DW_AT_byte_size";
9330 case DW_AT_bit_offset
:
9331 return "DW_AT_bit_offset";
9332 case DW_AT_bit_size
:
9333 return "DW_AT_bit_size";
9334 case DW_AT_element_list
:
9335 return "DW_AT_element_list";
9336 case DW_AT_stmt_list
:
9337 return "DW_AT_stmt_list";
9339 return "DW_AT_low_pc";
9341 return "DW_AT_high_pc";
9342 case DW_AT_language
:
9343 return "DW_AT_language";
9345 return "DW_AT_member";
9347 return "DW_AT_discr";
9348 case DW_AT_discr_value
:
9349 return "DW_AT_discr_value";
9350 case DW_AT_visibility
:
9351 return "DW_AT_visibility";
9353 return "DW_AT_import";
9354 case DW_AT_string_length
:
9355 return "DW_AT_string_length";
9356 case DW_AT_common_reference
:
9357 return "DW_AT_common_reference";
9358 case DW_AT_comp_dir
:
9359 return "DW_AT_comp_dir";
9360 case DW_AT_const_value
:
9361 return "DW_AT_const_value";
9362 case DW_AT_containing_type
:
9363 return "DW_AT_containing_type";
9364 case DW_AT_default_value
:
9365 return "DW_AT_default_value";
9367 return "DW_AT_inline";
9368 case DW_AT_is_optional
:
9369 return "DW_AT_is_optional";
9370 case DW_AT_lower_bound
:
9371 return "DW_AT_lower_bound";
9372 case DW_AT_producer
:
9373 return "DW_AT_producer";
9374 case DW_AT_prototyped
:
9375 return "DW_AT_prototyped";
9376 case DW_AT_return_addr
:
9377 return "DW_AT_return_addr";
9378 case DW_AT_start_scope
:
9379 return "DW_AT_start_scope";
9380 case DW_AT_bit_stride
:
9381 return "DW_AT_bit_stride";
9382 case DW_AT_upper_bound
:
9383 return "DW_AT_upper_bound";
9384 case DW_AT_abstract_origin
:
9385 return "DW_AT_abstract_origin";
9386 case DW_AT_accessibility
:
9387 return "DW_AT_accessibility";
9388 case DW_AT_address_class
:
9389 return "DW_AT_address_class";
9390 case DW_AT_artificial
:
9391 return "DW_AT_artificial";
9392 case DW_AT_base_types
:
9393 return "DW_AT_base_types";
9394 case DW_AT_calling_convention
:
9395 return "DW_AT_calling_convention";
9397 return "DW_AT_count";
9398 case DW_AT_data_member_location
:
9399 return "DW_AT_data_member_location";
9400 case DW_AT_decl_column
:
9401 return "DW_AT_decl_column";
9402 case DW_AT_decl_file
:
9403 return "DW_AT_decl_file";
9404 case DW_AT_decl_line
:
9405 return "DW_AT_decl_line";
9406 case DW_AT_declaration
:
9407 return "DW_AT_declaration";
9408 case DW_AT_discr_list
:
9409 return "DW_AT_discr_list";
9410 case DW_AT_encoding
:
9411 return "DW_AT_encoding";
9412 case DW_AT_external
:
9413 return "DW_AT_external";
9414 case DW_AT_frame_base
:
9415 return "DW_AT_frame_base";
9417 return "DW_AT_friend";
9418 case DW_AT_identifier_case
:
9419 return "DW_AT_identifier_case";
9420 case DW_AT_macro_info
:
9421 return "DW_AT_macro_info";
9422 case DW_AT_namelist_items
:
9423 return "DW_AT_namelist_items";
9424 case DW_AT_priority
:
9425 return "DW_AT_priority";
9427 return "DW_AT_segment";
9428 case DW_AT_specification
:
9429 return "DW_AT_specification";
9430 case DW_AT_static_link
:
9431 return "DW_AT_static_link";
9433 return "DW_AT_type";
9434 case DW_AT_use_location
:
9435 return "DW_AT_use_location";
9436 case DW_AT_variable_parameter
:
9437 return "DW_AT_variable_parameter";
9438 case DW_AT_virtuality
:
9439 return "DW_AT_virtuality";
9440 case DW_AT_vtable_elem_location
:
9441 return "DW_AT_vtable_elem_location";
9442 /* DWARF 3 values. */
9443 case DW_AT_allocated
:
9444 return "DW_AT_allocated";
9445 case DW_AT_associated
:
9446 return "DW_AT_associated";
9447 case DW_AT_data_location
:
9448 return "DW_AT_data_location";
9449 case DW_AT_byte_stride
:
9450 return "DW_AT_byte_stride";
9451 case DW_AT_entry_pc
:
9452 return "DW_AT_entry_pc";
9453 case DW_AT_use_UTF8
:
9454 return "DW_AT_use_UTF8";
9455 case DW_AT_extension
:
9456 return "DW_AT_extension";
9458 return "DW_AT_ranges";
9459 case DW_AT_trampoline
:
9460 return "DW_AT_trampoline";
9461 case DW_AT_call_column
:
9462 return "DW_AT_call_column";
9463 case DW_AT_call_file
:
9464 return "DW_AT_call_file";
9465 case DW_AT_call_line
:
9466 return "DW_AT_call_line";
9467 case DW_AT_description
:
9468 return "DW_AT_description";
9469 case DW_AT_binary_scale
:
9470 return "DW_AT_binary_scale";
9471 case DW_AT_decimal_scale
:
9472 return "DW_AT_decimal_scale";
9474 return "DW_AT_small";
9475 case DW_AT_decimal_sign
:
9476 return "DW_AT_decimal_sign";
9477 case DW_AT_digit_count
:
9478 return "DW_AT_digit_count";
9479 case DW_AT_picture_string
:
9480 return "DW_AT_picture_string";
9482 return "DW_AT_mutable";
9483 case DW_AT_threads_scaled
:
9484 return "DW_AT_threads_scaled";
9485 case DW_AT_explicit
:
9486 return "DW_AT_explicit";
9487 case DW_AT_object_pointer
:
9488 return "DW_AT_object_pointer";
9489 case DW_AT_endianity
:
9490 return "DW_AT_endianity";
9491 case DW_AT_elemental
:
9492 return "DW_AT_elemental";
9494 return "DW_AT_pure";
9495 case DW_AT_recursive
:
9496 return "DW_AT_recursive";
9497 /* DWARF 4 values. */
9498 case DW_AT_signature
:
9499 return "DW_AT_signature";
9500 /* SGI/MIPS extensions. */
9501 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9502 case DW_AT_MIPS_fde
:
9503 return "DW_AT_MIPS_fde";
9505 case DW_AT_MIPS_loop_begin
:
9506 return "DW_AT_MIPS_loop_begin";
9507 case DW_AT_MIPS_tail_loop_begin
:
9508 return "DW_AT_MIPS_tail_loop_begin";
9509 case DW_AT_MIPS_epilog_begin
:
9510 return "DW_AT_MIPS_epilog_begin";
9511 case DW_AT_MIPS_loop_unroll_factor
:
9512 return "DW_AT_MIPS_loop_unroll_factor";
9513 case DW_AT_MIPS_software_pipeline_depth
:
9514 return "DW_AT_MIPS_software_pipeline_depth";
9515 case DW_AT_MIPS_linkage_name
:
9516 return "DW_AT_MIPS_linkage_name";
9517 case DW_AT_MIPS_stride
:
9518 return "DW_AT_MIPS_stride";
9519 case DW_AT_MIPS_abstract_name
:
9520 return "DW_AT_MIPS_abstract_name";
9521 case DW_AT_MIPS_clone_origin
:
9522 return "DW_AT_MIPS_clone_origin";
9523 case DW_AT_MIPS_has_inlines
:
9524 return "DW_AT_MIPS_has_inlines";
9525 /* HP extensions. */
9526 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9527 case DW_AT_HP_block_index
:
9528 return "DW_AT_HP_block_index";
9530 case DW_AT_HP_unmodifiable
:
9531 return "DW_AT_HP_unmodifiable";
9532 case DW_AT_HP_actuals_stmt_list
:
9533 return "DW_AT_HP_actuals_stmt_list";
9534 case DW_AT_HP_proc_per_section
:
9535 return "DW_AT_HP_proc_per_section";
9536 case DW_AT_HP_raw_data_ptr
:
9537 return "DW_AT_HP_raw_data_ptr";
9538 case DW_AT_HP_pass_by_reference
:
9539 return "DW_AT_HP_pass_by_reference";
9540 case DW_AT_HP_opt_level
:
9541 return "DW_AT_HP_opt_level";
9542 case DW_AT_HP_prof_version_id
:
9543 return "DW_AT_HP_prof_version_id";
9544 case DW_AT_HP_opt_flags
:
9545 return "DW_AT_HP_opt_flags";
9546 case DW_AT_HP_cold_region_low_pc
:
9547 return "DW_AT_HP_cold_region_low_pc";
9548 case DW_AT_HP_cold_region_high_pc
:
9549 return "DW_AT_HP_cold_region_high_pc";
9550 case DW_AT_HP_all_variables_modifiable
:
9551 return "DW_AT_HP_all_variables_modifiable";
9552 case DW_AT_HP_linkage_name
:
9553 return "DW_AT_HP_linkage_name";
9554 case DW_AT_HP_prof_flags
:
9555 return "DW_AT_HP_prof_flags";
9556 /* GNU extensions. */
9557 case DW_AT_sf_names
:
9558 return "DW_AT_sf_names";
9559 case DW_AT_src_info
:
9560 return "DW_AT_src_info";
9561 case DW_AT_mac_info
:
9562 return "DW_AT_mac_info";
9563 case DW_AT_src_coords
:
9564 return "DW_AT_src_coords";
9565 case DW_AT_body_begin
:
9566 return "DW_AT_body_begin";
9567 case DW_AT_body_end
:
9568 return "DW_AT_body_end";
9569 case DW_AT_GNU_vector
:
9570 return "DW_AT_GNU_vector";
9571 /* VMS extensions. */
9572 case DW_AT_VMS_rtnbeg_pd_address
:
9573 return "DW_AT_VMS_rtnbeg_pd_address";
9574 /* UPC extension. */
9575 case DW_AT_upc_threads_scaled
:
9576 return "DW_AT_upc_threads_scaled";
9577 /* PGI (STMicroelectronics) extensions. */
9578 case DW_AT_PGI_lbase
:
9579 return "DW_AT_PGI_lbase";
9580 case DW_AT_PGI_soffset
:
9581 return "DW_AT_PGI_soffset";
9582 case DW_AT_PGI_lstride
:
9583 return "DW_AT_PGI_lstride";
9585 return "DW_AT_<unknown>";
9589 /* Convert a DWARF value form code into its string name. */
9592 dwarf_form_name (unsigned form
)
9597 return "DW_FORM_addr";
9598 case DW_FORM_block2
:
9599 return "DW_FORM_block2";
9600 case DW_FORM_block4
:
9601 return "DW_FORM_block4";
9603 return "DW_FORM_data2";
9605 return "DW_FORM_data4";
9607 return "DW_FORM_data8";
9608 case DW_FORM_string
:
9609 return "DW_FORM_string";
9611 return "DW_FORM_block";
9612 case DW_FORM_block1
:
9613 return "DW_FORM_block1";
9615 return "DW_FORM_data1";
9617 return "DW_FORM_flag";
9619 return "DW_FORM_sdata";
9621 return "DW_FORM_strp";
9623 return "DW_FORM_udata";
9624 case DW_FORM_ref_addr
:
9625 return "DW_FORM_ref_addr";
9627 return "DW_FORM_ref1";
9629 return "DW_FORM_ref2";
9631 return "DW_FORM_ref4";
9633 return "DW_FORM_ref8";
9634 case DW_FORM_ref_udata
:
9635 return "DW_FORM_ref_udata";
9636 case DW_FORM_indirect
:
9637 return "DW_FORM_indirect";
9638 case DW_FORM_sec_offset
:
9639 return "DW_FORM_sec_offset";
9640 case DW_FORM_exprloc
:
9641 return "DW_FORM_exprloc";
9642 case DW_FORM_flag_present
:
9643 return "DW_FORM_flag_present";
9645 return "DW_FORM_sig8";
9647 return "DW_FORM_<unknown>";
9651 /* Convert a DWARF stack opcode into its string name. */
9654 dwarf_stack_op_name (unsigned op
)
9659 return "DW_OP_addr";
9661 return "DW_OP_deref";
9663 return "DW_OP_const1u";
9665 return "DW_OP_const1s";
9667 return "DW_OP_const2u";
9669 return "DW_OP_const2s";
9671 return "DW_OP_const4u";
9673 return "DW_OP_const4s";
9675 return "DW_OP_const8u";
9677 return "DW_OP_const8s";
9679 return "DW_OP_constu";
9681 return "DW_OP_consts";
9685 return "DW_OP_drop";
9687 return "DW_OP_over";
9689 return "DW_OP_pick";
9691 return "DW_OP_swap";
9695 return "DW_OP_xderef";
9703 return "DW_OP_minus";
9715 return "DW_OP_plus";
9716 case DW_OP_plus_uconst
:
9717 return "DW_OP_plus_uconst";
9723 return "DW_OP_shra";
9741 return "DW_OP_skip";
9743 return "DW_OP_lit0";
9745 return "DW_OP_lit1";
9747 return "DW_OP_lit2";
9749 return "DW_OP_lit3";
9751 return "DW_OP_lit4";
9753 return "DW_OP_lit5";
9755 return "DW_OP_lit6";
9757 return "DW_OP_lit7";
9759 return "DW_OP_lit8";
9761 return "DW_OP_lit9";
9763 return "DW_OP_lit10";
9765 return "DW_OP_lit11";
9767 return "DW_OP_lit12";
9769 return "DW_OP_lit13";
9771 return "DW_OP_lit14";
9773 return "DW_OP_lit15";
9775 return "DW_OP_lit16";
9777 return "DW_OP_lit17";
9779 return "DW_OP_lit18";
9781 return "DW_OP_lit19";
9783 return "DW_OP_lit20";
9785 return "DW_OP_lit21";
9787 return "DW_OP_lit22";
9789 return "DW_OP_lit23";
9791 return "DW_OP_lit24";
9793 return "DW_OP_lit25";
9795 return "DW_OP_lit26";
9797 return "DW_OP_lit27";
9799 return "DW_OP_lit28";
9801 return "DW_OP_lit29";
9803 return "DW_OP_lit30";
9805 return "DW_OP_lit31";
9807 return "DW_OP_reg0";
9809 return "DW_OP_reg1";
9811 return "DW_OP_reg2";
9813 return "DW_OP_reg3";
9815 return "DW_OP_reg4";
9817 return "DW_OP_reg5";
9819 return "DW_OP_reg6";
9821 return "DW_OP_reg7";
9823 return "DW_OP_reg8";
9825 return "DW_OP_reg9";
9827 return "DW_OP_reg10";
9829 return "DW_OP_reg11";
9831 return "DW_OP_reg12";
9833 return "DW_OP_reg13";
9835 return "DW_OP_reg14";
9837 return "DW_OP_reg15";
9839 return "DW_OP_reg16";
9841 return "DW_OP_reg17";
9843 return "DW_OP_reg18";
9845 return "DW_OP_reg19";
9847 return "DW_OP_reg20";
9849 return "DW_OP_reg21";
9851 return "DW_OP_reg22";
9853 return "DW_OP_reg23";
9855 return "DW_OP_reg24";
9857 return "DW_OP_reg25";
9859 return "DW_OP_reg26";
9861 return "DW_OP_reg27";
9863 return "DW_OP_reg28";
9865 return "DW_OP_reg29";
9867 return "DW_OP_reg30";
9869 return "DW_OP_reg31";
9871 return "DW_OP_breg0";
9873 return "DW_OP_breg1";
9875 return "DW_OP_breg2";
9877 return "DW_OP_breg3";
9879 return "DW_OP_breg4";
9881 return "DW_OP_breg5";
9883 return "DW_OP_breg6";
9885 return "DW_OP_breg7";
9887 return "DW_OP_breg8";
9889 return "DW_OP_breg9";
9891 return "DW_OP_breg10";
9893 return "DW_OP_breg11";
9895 return "DW_OP_breg12";
9897 return "DW_OP_breg13";
9899 return "DW_OP_breg14";
9901 return "DW_OP_breg15";
9903 return "DW_OP_breg16";
9905 return "DW_OP_breg17";
9907 return "DW_OP_breg18";
9909 return "DW_OP_breg19";
9911 return "DW_OP_breg20";
9913 return "DW_OP_breg21";
9915 return "DW_OP_breg22";
9917 return "DW_OP_breg23";
9919 return "DW_OP_breg24";
9921 return "DW_OP_breg25";
9923 return "DW_OP_breg26";
9925 return "DW_OP_breg27";
9927 return "DW_OP_breg28";
9929 return "DW_OP_breg29";
9931 return "DW_OP_breg30";
9933 return "DW_OP_breg31";
9935 return "DW_OP_regx";
9937 return "DW_OP_fbreg";
9939 return "DW_OP_bregx";
9941 return "DW_OP_piece";
9942 case DW_OP_deref_size
:
9943 return "DW_OP_deref_size";
9944 case DW_OP_xderef_size
:
9945 return "DW_OP_xderef_size";
9948 /* DWARF 3 extensions. */
9949 case DW_OP_push_object_address
:
9950 return "DW_OP_push_object_address";
9952 return "DW_OP_call2";
9954 return "DW_OP_call4";
9955 case DW_OP_call_ref
:
9956 return "DW_OP_call_ref";
9957 /* GNU extensions. */
9958 case DW_OP_form_tls_address
:
9959 return "DW_OP_form_tls_address";
9960 case DW_OP_call_frame_cfa
:
9961 return "DW_OP_call_frame_cfa";
9962 case DW_OP_bit_piece
:
9963 return "DW_OP_bit_piece";
9964 case DW_OP_GNU_push_tls_address
:
9965 return "DW_OP_GNU_push_tls_address";
9966 case DW_OP_GNU_uninit
:
9967 return "DW_OP_GNU_uninit";
9968 /* HP extensions. */
9969 case DW_OP_HP_is_value
:
9970 return "DW_OP_HP_is_value";
9971 case DW_OP_HP_fltconst4
:
9972 return "DW_OP_HP_fltconst4";
9973 case DW_OP_HP_fltconst8
:
9974 return "DW_OP_HP_fltconst8";
9975 case DW_OP_HP_mod_range
:
9976 return "DW_OP_HP_mod_range";
9977 case DW_OP_HP_unmod_range
:
9978 return "DW_OP_HP_unmod_range";
9980 return "DW_OP_HP_tls";
9982 return "OP_<unknown>";
9987 dwarf_bool_name (unsigned mybool
)
9995 /* Convert a DWARF type code into its string name. */
9998 dwarf_type_encoding_name (unsigned enc
)
10003 return "DW_ATE_void";
10004 case DW_ATE_address
:
10005 return "DW_ATE_address";
10006 case DW_ATE_boolean
:
10007 return "DW_ATE_boolean";
10008 case DW_ATE_complex_float
:
10009 return "DW_ATE_complex_float";
10011 return "DW_ATE_float";
10012 case DW_ATE_signed
:
10013 return "DW_ATE_signed";
10014 case DW_ATE_signed_char
:
10015 return "DW_ATE_signed_char";
10016 case DW_ATE_unsigned
:
10017 return "DW_ATE_unsigned";
10018 case DW_ATE_unsigned_char
:
10019 return "DW_ATE_unsigned_char";
10021 case DW_ATE_imaginary_float
:
10022 return "DW_ATE_imaginary_float";
10023 case DW_ATE_packed_decimal
:
10024 return "DW_ATE_packed_decimal";
10025 case DW_ATE_numeric_string
:
10026 return "DW_ATE_numeric_string";
10027 case DW_ATE_edited
:
10028 return "DW_ATE_edited";
10029 case DW_ATE_signed_fixed
:
10030 return "DW_ATE_signed_fixed";
10031 case DW_ATE_unsigned_fixed
:
10032 return "DW_ATE_unsigned_fixed";
10033 case DW_ATE_decimal_float
:
10034 return "DW_ATE_decimal_float";
10035 /* HP extensions. */
10036 case DW_ATE_HP_float80
:
10037 return "DW_ATE_HP_float80";
10038 case DW_ATE_HP_complex_float80
:
10039 return "DW_ATE_HP_complex_float80";
10040 case DW_ATE_HP_float128
:
10041 return "DW_ATE_HP_float128";
10042 case DW_ATE_HP_complex_float128
:
10043 return "DW_ATE_HP_complex_float128";
10044 case DW_ATE_HP_floathpintel
:
10045 return "DW_ATE_HP_floathpintel";
10046 case DW_ATE_HP_imaginary_float80
:
10047 return "DW_ATE_HP_imaginary_float80";
10048 case DW_ATE_HP_imaginary_float128
:
10049 return "DW_ATE_HP_imaginary_float128";
10051 return "DW_ATE_<unknown>";
10055 /* Convert a DWARF call frame info operation to its string name. */
10059 dwarf_cfi_name (unsigned cfi_opc
)
10063 case DW_CFA_advance_loc
:
10064 return "DW_CFA_advance_loc";
10065 case DW_CFA_offset
:
10066 return "DW_CFA_offset";
10067 case DW_CFA_restore
:
10068 return "DW_CFA_restore";
10070 return "DW_CFA_nop";
10071 case DW_CFA_set_loc
:
10072 return "DW_CFA_set_loc";
10073 case DW_CFA_advance_loc1
:
10074 return "DW_CFA_advance_loc1";
10075 case DW_CFA_advance_loc2
:
10076 return "DW_CFA_advance_loc2";
10077 case DW_CFA_advance_loc4
:
10078 return "DW_CFA_advance_loc4";
10079 case DW_CFA_offset_extended
:
10080 return "DW_CFA_offset_extended";
10081 case DW_CFA_restore_extended
:
10082 return "DW_CFA_restore_extended";
10083 case DW_CFA_undefined
:
10084 return "DW_CFA_undefined";
10085 case DW_CFA_same_value
:
10086 return "DW_CFA_same_value";
10087 case DW_CFA_register
:
10088 return "DW_CFA_register";
10089 case DW_CFA_remember_state
:
10090 return "DW_CFA_remember_state";
10091 case DW_CFA_restore_state
:
10092 return "DW_CFA_restore_state";
10093 case DW_CFA_def_cfa
:
10094 return "DW_CFA_def_cfa";
10095 case DW_CFA_def_cfa_register
:
10096 return "DW_CFA_def_cfa_register";
10097 case DW_CFA_def_cfa_offset
:
10098 return "DW_CFA_def_cfa_offset";
10100 case DW_CFA_def_cfa_expression
:
10101 return "DW_CFA_def_cfa_expression";
10102 case DW_CFA_expression
:
10103 return "DW_CFA_expression";
10104 case DW_CFA_offset_extended_sf
:
10105 return "DW_CFA_offset_extended_sf";
10106 case DW_CFA_def_cfa_sf
:
10107 return "DW_CFA_def_cfa_sf";
10108 case DW_CFA_def_cfa_offset_sf
:
10109 return "DW_CFA_def_cfa_offset_sf";
10110 case DW_CFA_val_offset
:
10111 return "DW_CFA_val_offset";
10112 case DW_CFA_val_offset_sf
:
10113 return "DW_CFA_val_offset_sf";
10114 case DW_CFA_val_expression
:
10115 return "DW_CFA_val_expression";
10116 /* SGI/MIPS specific. */
10117 case DW_CFA_MIPS_advance_loc8
:
10118 return "DW_CFA_MIPS_advance_loc8";
10119 /* GNU extensions. */
10120 case DW_CFA_GNU_window_save
:
10121 return "DW_CFA_GNU_window_save";
10122 case DW_CFA_GNU_args_size
:
10123 return "DW_CFA_GNU_args_size";
10124 case DW_CFA_GNU_negative_offset_extended
:
10125 return "DW_CFA_GNU_negative_offset_extended";
10127 return "DW_CFA_<unknown>";
10133 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10137 print_spaces (indent
, f
);
10138 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10139 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10141 if (die
->parent
!= NULL
)
10143 print_spaces (indent
, f
);
10144 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10145 die
->parent
->offset
);
10148 print_spaces (indent
, f
);
10149 fprintf_unfiltered (f
, " has children: %s\n",
10150 dwarf_bool_name (die
->child
!= NULL
));
10152 print_spaces (indent
, f
);
10153 fprintf_unfiltered (f
, " attributes:\n");
10155 for (i
= 0; i
< die
->num_attrs
; ++i
)
10157 print_spaces (indent
, f
);
10158 fprintf_unfiltered (f
, " %s (%s) ",
10159 dwarf_attr_name (die
->attrs
[i
].name
),
10160 dwarf_form_name (die
->attrs
[i
].form
));
10162 switch (die
->attrs
[i
].form
)
10164 case DW_FORM_ref_addr
:
10166 fprintf_unfiltered (f
, "address: ");
10167 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10169 case DW_FORM_block2
:
10170 case DW_FORM_block4
:
10171 case DW_FORM_block
:
10172 case DW_FORM_block1
:
10173 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10178 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10179 (long) (DW_ADDR (&die
->attrs
[i
])));
10181 case DW_FORM_data1
:
10182 case DW_FORM_data2
:
10183 case DW_FORM_data4
:
10184 case DW_FORM_data8
:
10185 case DW_FORM_udata
:
10186 case DW_FORM_sdata
:
10187 fprintf_unfiltered (f
, "constant: %s",
10188 pulongest (DW_UNSND (&die
->attrs
[i
])));
10191 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10192 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10193 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10195 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10197 case DW_FORM_string
:
10199 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10200 DW_STRING (&die
->attrs
[i
])
10201 ? DW_STRING (&die
->attrs
[i
]) : "",
10202 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10205 if (DW_UNSND (&die
->attrs
[i
]))
10206 fprintf_unfiltered (f
, "flag: TRUE");
10208 fprintf_unfiltered (f
, "flag: FALSE");
10210 case DW_FORM_indirect
:
10211 /* the reader will have reduced the indirect form to
10212 the "base form" so this form should not occur */
10213 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10216 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10217 die
->attrs
[i
].form
);
10220 fprintf_unfiltered (f
, "\n");
10225 dump_die_for_error (struct die_info
*die
)
10227 dump_die_shallow (gdb_stderr
, 0, die
);
10231 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10233 int indent
= level
* 4;
10235 gdb_assert (die
!= NULL
);
10237 if (level
>= max_level
)
10240 dump_die_shallow (f
, indent
, die
);
10242 if (die
->child
!= NULL
)
10244 print_spaces (indent
, f
);
10245 fprintf_unfiltered (f
, " Children:");
10246 if (level
+ 1 < max_level
)
10248 fprintf_unfiltered (f
, "\n");
10249 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10253 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10257 if (die
->sibling
!= NULL
&& level
> 0)
10259 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10263 /* This is called from the pdie macro in gdbinit.in.
10264 It's not static so gcc will keep a copy callable from gdb. */
10267 dump_die (struct die_info
*die
, int max_level
)
10269 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10273 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10277 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10283 is_ref_attr (struct attribute
*attr
)
10285 switch (attr
->form
)
10287 case DW_FORM_ref_addr
:
10292 case DW_FORM_ref_udata
:
10299 static unsigned int
10300 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10302 if (is_ref_attr (attr
))
10303 return DW_ADDR (attr
);
10305 complaint (&symfile_complaints
,
10306 _("unsupported die ref attribute form: '%s'"),
10307 dwarf_form_name (attr
->form
));
10311 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10312 * the value held by the attribute is not constant. */
10315 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10317 if (attr
->form
== DW_FORM_sdata
)
10318 return DW_SND (attr
);
10319 else if (attr
->form
== DW_FORM_udata
10320 || attr
->form
== DW_FORM_data1
10321 || attr
->form
== DW_FORM_data2
10322 || attr
->form
== DW_FORM_data4
10323 || attr
->form
== DW_FORM_data8
)
10324 return DW_UNSND (attr
);
10327 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10328 dwarf_form_name (attr
->form
));
10329 return default_value
;
10333 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10334 unit and add it to our queue.
10335 The result is non-zero if PER_CU was queued, otherwise the result is zero
10336 meaning either PER_CU is already queued or it is already loaded. */
10339 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10340 struct dwarf2_per_cu_data
*per_cu
)
10342 /* Mark the dependence relation so that we don't flush PER_CU
10344 dwarf2_add_dependence (this_cu
, per_cu
);
10346 /* If it's already on the queue, we have nothing to do. */
10347 if (per_cu
->queued
)
10350 /* If the compilation unit is already loaded, just mark it as
10352 if (per_cu
->cu
!= NULL
)
10354 per_cu
->cu
->last_used
= 0;
10358 /* Add it to the queue. */
10359 queue_comp_unit (per_cu
, this_cu
->objfile
);
10364 /* Follow reference or signature attribute ATTR of SRC_DIE.
10365 On entry *REF_CU is the CU of SRC_DIE.
10366 On exit *REF_CU is the CU of the result. */
10368 static struct die_info
*
10369 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10370 struct dwarf2_cu
**ref_cu
)
10372 struct die_info
*die
;
10374 if (is_ref_attr (attr
))
10375 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10376 else if (attr
->form
== DW_FORM_sig8
)
10377 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10380 dump_die_for_error (src_die
);
10381 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10382 (*ref_cu
)->objfile
->name
);
10388 /* Follow reference attribute ATTR of SRC_DIE.
10389 On entry *REF_CU is the CU of SRC_DIE.
10390 On exit *REF_CU is the CU of the result. */
10392 static struct die_info
*
10393 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10394 struct dwarf2_cu
**ref_cu
)
10396 struct die_info
*die
;
10397 unsigned int offset
;
10398 struct die_info temp_die
;
10399 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10401 gdb_assert (cu
->per_cu
!= NULL
);
10403 offset
= dwarf2_get_ref_die_offset (attr
);
10405 if (cu
->per_cu
->from_debug_types
)
10407 /* .debug_types CUs cannot reference anything outside their CU.
10408 If they need to, they have to reference a signatured type via
10410 if (! offset_in_cu_p (&cu
->header
, offset
))
10414 else if (! offset_in_cu_p (&cu
->header
, offset
))
10416 struct dwarf2_per_cu_data
*per_cu
;
10417 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10419 /* If necessary, add it to the queue and load its DIEs. */
10420 if (maybe_queue_comp_unit (cu
, per_cu
))
10421 load_full_comp_unit (per_cu
, cu
->objfile
);
10423 target_cu
= per_cu
->cu
;
10428 *ref_cu
= target_cu
;
10429 temp_die
.offset
= offset
;
10430 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10436 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10437 "at 0x%x [in module %s]"),
10438 offset
, src_die
->offset
, cu
->objfile
->name
);
10441 /* Follow the signature attribute ATTR in SRC_DIE.
10442 On entry *REF_CU is the CU of SRC_DIE.
10443 On exit *REF_CU is the CU of the result. */
10445 static struct die_info
*
10446 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10447 struct dwarf2_cu
**ref_cu
)
10449 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10450 struct die_info temp_die
;
10451 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10452 struct dwarf2_cu
*sig_cu
;
10453 struct die_info
*die
;
10455 /* sig_type will be NULL if the signatured type is missing from
10457 if (sig_type
== NULL
)
10458 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10459 "at 0x%x [in module %s]"),
10460 src_die
->offset
, objfile
->name
);
10462 /* If necessary, add it to the queue and load its DIEs. */
10464 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10465 read_signatured_type (objfile
, sig_type
);
10467 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10469 sig_cu
= sig_type
->per_cu
.cu
;
10470 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10471 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10478 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10479 "at 0x%x [in module %s]"),
10480 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10483 /* Given an offset of a signatured type, return its signatured_type. */
10485 static struct signatured_type
*
10486 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10488 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10489 unsigned int length
, initial_length_size
;
10490 unsigned int sig_offset
;
10491 struct signatured_type find_entry
, *type_sig
;
10493 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10494 sig_offset
= (initial_length_size
10496 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10497 + 1 /*address_size*/);
10498 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10499 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10501 /* This is only used to lookup previously recorded types.
10502 If we didn't find it, it's our bug. */
10503 gdb_assert (type_sig
!= NULL
);
10504 gdb_assert (offset
== type_sig
->offset
);
10509 /* Read in signatured type at OFFSET and build its CU and die(s). */
10512 read_signatured_type_at_offset (struct objfile
*objfile
,
10513 unsigned int offset
)
10515 struct signatured_type
*type_sig
;
10517 /* We have the section offset, but we need the signature to do the
10518 hash table lookup. */
10519 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10521 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10523 read_signatured_type (objfile
, type_sig
);
10525 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10528 /* Read in a signatured type and build its CU and DIEs. */
10531 read_signatured_type (struct objfile
*objfile
,
10532 struct signatured_type
*type_sig
)
10534 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10535 struct die_reader_specs reader_specs
;
10536 struct dwarf2_cu
*cu
;
10537 ULONGEST signature
;
10538 struct cleanup
*back_to
, *free_cu_cleanup
;
10539 struct attribute
*attr
;
10541 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10543 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10544 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10545 obstack_init (&cu
->comp_unit_obstack
);
10546 cu
->objfile
= objfile
;
10547 type_sig
->per_cu
.cu
= cu
;
10548 cu
->per_cu
= &type_sig
->per_cu
;
10550 /* If an error occurs while loading, release our storage. */
10551 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10553 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10554 types_ptr
, objfile
->obfd
);
10555 gdb_assert (signature
== type_sig
->signature
);
10558 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10562 &cu
->comp_unit_obstack
,
10563 hashtab_obstack_allocate
,
10564 dummy_obstack_deallocate
);
10566 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10567 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10569 init_cu_die_reader (&reader_specs
, cu
);
10571 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10574 /* We try not to read any attributes in this function, because not
10575 all objfiles needed for references have been loaded yet, and symbol
10576 table processing isn't initialized. But we have to set the CU language,
10577 or we won't be able to build types correctly. */
10578 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10580 set_cu_language (DW_UNSND (attr
), cu
);
10582 set_cu_language (language_minimal
, cu
);
10584 do_cleanups (back_to
);
10586 /* We've successfully allocated this compilation unit. Let our caller
10587 clean it up when finished with it. */
10588 discard_cleanups (free_cu_cleanup
);
10590 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10591 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10594 /* Decode simple location descriptions.
10595 Given a pointer to a dwarf block that defines a location, compute
10596 the location and return the value.
10598 NOTE drow/2003-11-18: This function is called in two situations
10599 now: for the address of static or global variables (partial symbols
10600 only) and for offsets into structures which are expected to be
10601 (more or less) constant. The partial symbol case should go away,
10602 and only the constant case should remain. That will let this
10603 function complain more accurately. A few special modes are allowed
10604 without complaint for global variables (for instance, global
10605 register values and thread-local values).
10607 A location description containing no operations indicates that the
10608 object is optimized out. The return value is 0 for that case.
10609 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10610 callers will only want a very basic result and this can become a
10613 Note that stack[0] is unused except as a default error return.
10614 Note that stack overflow is not yet handled. */
10617 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10619 struct objfile
*objfile
= cu
->objfile
;
10620 struct comp_unit_head
*cu_header
= &cu
->header
;
10622 int size
= blk
->size
;
10623 gdb_byte
*data
= blk
->data
;
10624 CORE_ADDR stack
[64];
10626 unsigned int bytes_read
, unsnd
;
10670 stack
[++stacki
] = op
- DW_OP_lit0
;
10705 stack
[++stacki
] = op
- DW_OP_reg0
;
10707 dwarf2_complex_location_expr_complaint ();
10711 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10713 stack
[++stacki
] = unsnd
;
10715 dwarf2_complex_location_expr_complaint ();
10719 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10724 case DW_OP_const1u
:
10725 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10729 case DW_OP_const1s
:
10730 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10734 case DW_OP_const2u
:
10735 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10739 case DW_OP_const2s
:
10740 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10744 case DW_OP_const4u
:
10745 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10749 case DW_OP_const4s
:
10750 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10755 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10761 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10766 stack
[stacki
+ 1] = stack
[stacki
];
10771 stack
[stacki
- 1] += stack
[stacki
];
10775 case DW_OP_plus_uconst
:
10776 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10781 stack
[stacki
- 1] -= stack
[stacki
];
10786 /* If we're not the last op, then we definitely can't encode
10787 this using GDB's address_class enum. This is valid for partial
10788 global symbols, although the variable's address will be bogus
10791 dwarf2_complex_location_expr_complaint ();
10794 case DW_OP_GNU_push_tls_address
:
10795 /* The top of the stack has the offset from the beginning
10796 of the thread control block at which the variable is located. */
10797 /* Nothing should follow this operator, so the top of stack would
10799 /* This is valid for partial global symbols, but the variable's
10800 address will be bogus in the psymtab. */
10802 dwarf2_complex_location_expr_complaint ();
10805 case DW_OP_GNU_uninit
:
10809 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10810 dwarf_stack_op_name (op
));
10811 return (stack
[stacki
]);
10814 return (stack
[stacki
]);
10817 /* memory allocation interface */
10819 static struct dwarf_block
*
10820 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10822 struct dwarf_block
*blk
;
10824 blk
= (struct dwarf_block
*)
10825 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10829 static struct abbrev_info
*
10830 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10832 struct abbrev_info
*abbrev
;
10834 abbrev
= (struct abbrev_info
*)
10835 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10836 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10840 static struct die_info
*
10841 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10843 struct die_info
*die
;
10844 size_t size
= sizeof (struct die_info
);
10847 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10849 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10850 memset (die
, 0, sizeof (struct die_info
));
10855 /* Macro support. */
10858 /* Return the full name of file number I in *LH's file name table.
10859 Use COMP_DIR as the name of the current directory of the
10860 compilation. The result is allocated using xmalloc; the caller is
10861 responsible for freeing it. */
10863 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10865 /* Is the file number a valid index into the line header's file name
10866 table? Remember that file numbers start with one, not zero. */
10867 if (1 <= file
&& file
<= lh
->num_file_names
)
10869 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10871 if (IS_ABSOLUTE_PATH (fe
->name
))
10872 return xstrdup (fe
->name
);
10880 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10886 dir_len
= strlen (dir
);
10887 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10888 strcpy (full_name
, dir
);
10889 full_name
[dir_len
] = '/';
10890 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10894 return xstrdup (fe
->name
);
10899 /* The compiler produced a bogus file number. We can at least
10900 record the macro definitions made in the file, even if we
10901 won't be able to find the file by name. */
10902 char fake_name
[80];
10903 sprintf (fake_name
, "<bad macro file number %d>", file
);
10905 complaint (&symfile_complaints
,
10906 _("bad file number in macro information (%d)"),
10909 return xstrdup (fake_name
);
10914 static struct macro_source_file
*
10915 macro_start_file (int file
, int line
,
10916 struct macro_source_file
*current_file
,
10917 const char *comp_dir
,
10918 struct line_header
*lh
, struct objfile
*objfile
)
10920 /* The full name of this source file. */
10921 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10923 /* We don't create a macro table for this compilation unit
10924 at all until we actually get a filename. */
10925 if (! pending_macros
)
10926 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10927 objfile
->macro_cache
);
10929 if (! current_file
)
10930 /* If we have no current file, then this must be the start_file
10931 directive for the compilation unit's main source file. */
10932 current_file
= macro_set_main (pending_macros
, full_name
);
10934 current_file
= macro_include (current_file
, line
, full_name
);
10938 return current_file
;
10942 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10943 followed by a null byte. */
10945 copy_string (const char *buf
, int len
)
10947 char *s
= xmalloc (len
+ 1);
10948 memcpy (s
, buf
, len
);
10955 static const char *
10956 consume_improper_spaces (const char *p
, const char *body
)
10960 complaint (&symfile_complaints
,
10961 _("macro definition contains spaces in formal argument list:\n`%s'"),
10973 parse_macro_definition (struct macro_source_file
*file
, int line
,
10978 /* The body string takes one of two forms. For object-like macro
10979 definitions, it should be:
10981 <macro name> " " <definition>
10983 For function-like macro definitions, it should be:
10985 <macro name> "() " <definition>
10987 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10989 Spaces may appear only where explicitly indicated, and in the
10992 The Dwarf 2 spec says that an object-like macro's name is always
10993 followed by a space, but versions of GCC around March 2002 omit
10994 the space when the macro's definition is the empty string.
10996 The Dwarf 2 spec says that there should be no spaces between the
10997 formal arguments in a function-like macro's formal argument list,
10998 but versions of GCC around March 2002 include spaces after the
11002 /* Find the extent of the macro name. The macro name is terminated
11003 by either a space or null character (for an object-like macro) or
11004 an opening paren (for a function-like macro). */
11005 for (p
= body
; *p
; p
++)
11006 if (*p
== ' ' || *p
== '(')
11009 if (*p
== ' ' || *p
== '\0')
11011 /* It's an object-like macro. */
11012 int name_len
= p
- body
;
11013 char *name
= copy_string (body
, name_len
);
11014 const char *replacement
;
11017 replacement
= body
+ name_len
+ 1;
11020 dwarf2_macro_malformed_definition_complaint (body
);
11021 replacement
= body
+ name_len
;
11024 macro_define_object (file
, line
, name
, replacement
);
11028 else if (*p
== '(')
11030 /* It's a function-like macro. */
11031 char *name
= copy_string (body
, p
- body
);
11034 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11038 p
= consume_improper_spaces (p
, body
);
11040 /* Parse the formal argument list. */
11041 while (*p
&& *p
!= ')')
11043 /* Find the extent of the current argument name. */
11044 const char *arg_start
= p
;
11046 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11049 if (! *p
|| p
== arg_start
)
11050 dwarf2_macro_malformed_definition_complaint (body
);
11053 /* Make sure argv has room for the new argument. */
11054 if (argc
>= argv_size
)
11057 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11060 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11063 p
= consume_improper_spaces (p
, body
);
11065 /* Consume the comma, if present. */
11070 p
= consume_improper_spaces (p
, body
);
11079 /* Perfectly formed definition, no complaints. */
11080 macro_define_function (file
, line
, name
,
11081 argc
, (const char **) argv
,
11083 else if (*p
== '\0')
11085 /* Complain, but do define it. */
11086 dwarf2_macro_malformed_definition_complaint (body
);
11087 macro_define_function (file
, line
, name
,
11088 argc
, (const char **) argv
,
11092 /* Just complain. */
11093 dwarf2_macro_malformed_definition_complaint (body
);
11096 /* Just complain. */
11097 dwarf2_macro_malformed_definition_complaint (body
);
11103 for (i
= 0; i
< argc
; i
++)
11109 dwarf2_macro_malformed_definition_complaint (body
);
11114 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11115 char *comp_dir
, bfd
*abfd
,
11116 struct dwarf2_cu
*cu
)
11118 gdb_byte
*mac_ptr
, *mac_end
;
11119 struct macro_source_file
*current_file
= 0;
11120 enum dwarf_macinfo_record_type macinfo_type
;
11121 int at_commandline
;
11123 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11125 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11129 /* First pass: Find the name of the base filename.
11130 This filename is needed in order to process all macros whose definition
11131 (or undefinition) comes from the command line. These macros are defined
11132 before the first DW_MACINFO_start_file entry, and yet still need to be
11133 associated to the base file.
11135 To determine the base file name, we scan the macro definitions until we
11136 reach the first DW_MACINFO_start_file entry. We then initialize
11137 CURRENT_FILE accordingly so that any macro definition found before the
11138 first DW_MACINFO_start_file can still be associated to the base file. */
11140 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11141 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11142 + dwarf2_per_objfile
->macinfo
.size
;
11146 /* Do we at least have room for a macinfo type byte? */
11147 if (mac_ptr
>= mac_end
)
11149 /* Complaint is printed during the second pass as GDB will probably
11150 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11154 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11157 switch (macinfo_type
)
11159 /* A zero macinfo type indicates the end of the macro
11164 case DW_MACINFO_define
:
11165 case DW_MACINFO_undef
:
11166 /* Only skip the data by MAC_PTR. */
11168 unsigned int bytes_read
;
11170 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11171 mac_ptr
+= bytes_read
;
11172 read_string (abfd
, mac_ptr
, &bytes_read
);
11173 mac_ptr
+= bytes_read
;
11177 case DW_MACINFO_start_file
:
11179 unsigned int bytes_read
;
11182 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11183 mac_ptr
+= bytes_read
;
11184 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11185 mac_ptr
+= bytes_read
;
11187 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11192 case DW_MACINFO_end_file
:
11193 /* No data to skip by MAC_PTR. */
11196 case DW_MACINFO_vendor_ext
:
11197 /* Only skip the data by MAC_PTR. */
11199 unsigned int bytes_read
;
11201 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11202 mac_ptr
+= bytes_read
;
11203 read_string (abfd
, mac_ptr
, &bytes_read
);
11204 mac_ptr
+= bytes_read
;
11211 } while (macinfo_type
!= 0 && current_file
== NULL
);
11213 /* Second pass: Process all entries.
11215 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11216 command-line macro definitions/undefinitions. This flag is unset when we
11217 reach the first DW_MACINFO_start_file entry. */
11219 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11221 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11222 GDB is still reading the definitions from command line. First
11223 DW_MACINFO_start_file will need to be ignored as it was already executed
11224 to create CURRENT_FILE for the main source holding also the command line
11225 definitions. On first met DW_MACINFO_start_file this flag is reset to
11226 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11228 at_commandline
= 1;
11232 /* Do we at least have room for a macinfo type byte? */
11233 if (mac_ptr
>= mac_end
)
11235 dwarf2_macros_too_long_complaint ();
11239 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11242 switch (macinfo_type
)
11244 /* A zero macinfo type indicates the end of the macro
11249 case DW_MACINFO_define
:
11250 case DW_MACINFO_undef
:
11252 unsigned int bytes_read
;
11256 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11257 mac_ptr
+= bytes_read
;
11258 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11259 mac_ptr
+= bytes_read
;
11261 if (! current_file
)
11263 /* DWARF violation as no main source is present. */
11264 complaint (&symfile_complaints
,
11265 _("debug info with no main source gives macro %s "
11267 macinfo_type
== DW_MACINFO_define
?
11269 macinfo_type
== DW_MACINFO_undef
?
11270 _("undefinition") :
11271 _("something-or-other"), line
, body
);
11274 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11275 complaint (&symfile_complaints
,
11276 _("debug info gives %s macro %s with %s line %d: %s"),
11277 at_commandline
? _("command-line") : _("in-file"),
11278 macinfo_type
== DW_MACINFO_define
?
11280 macinfo_type
== DW_MACINFO_undef
?
11281 _("undefinition") :
11282 _("something-or-other"),
11283 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11285 if (macinfo_type
== DW_MACINFO_define
)
11286 parse_macro_definition (current_file
, line
, body
);
11287 else if (macinfo_type
== DW_MACINFO_undef
)
11288 macro_undef (current_file
, line
, body
);
11292 case DW_MACINFO_start_file
:
11294 unsigned int bytes_read
;
11297 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11298 mac_ptr
+= bytes_read
;
11299 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11300 mac_ptr
+= bytes_read
;
11302 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11303 complaint (&symfile_complaints
,
11304 _("debug info gives source %d included "
11305 "from %s at %s line %d"),
11306 file
, at_commandline
? _("command-line") : _("file"),
11307 line
== 0 ? _("zero") : _("non-zero"), line
);
11309 if (at_commandline
)
11311 /* This DW_MACINFO_start_file was executed in the pass one. */
11312 at_commandline
= 0;
11315 current_file
= macro_start_file (file
, line
,
11316 current_file
, comp_dir
,
11321 case DW_MACINFO_end_file
:
11322 if (! current_file
)
11323 complaint (&symfile_complaints
,
11324 _("macro debug info has an unmatched `close_file' directive"));
11327 current_file
= current_file
->included_by
;
11328 if (! current_file
)
11330 enum dwarf_macinfo_record_type next_type
;
11332 /* GCC circa March 2002 doesn't produce the zero
11333 type byte marking the end of the compilation
11334 unit. Complain if it's not there, but exit no
11337 /* Do we at least have room for a macinfo type byte? */
11338 if (mac_ptr
>= mac_end
)
11340 dwarf2_macros_too_long_complaint ();
11344 /* We don't increment mac_ptr here, so this is just
11346 next_type
= read_1_byte (abfd
, mac_ptr
);
11347 if (next_type
!= 0)
11348 complaint (&symfile_complaints
,
11349 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11356 case DW_MACINFO_vendor_ext
:
11358 unsigned int bytes_read
;
11362 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11363 mac_ptr
+= bytes_read
;
11364 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11365 mac_ptr
+= bytes_read
;
11367 /* We don't recognize any vendor extensions. */
11371 } while (macinfo_type
!= 0);
11374 /* Check if the attribute's form is a DW_FORM_block*
11375 if so return true else false. */
11377 attr_form_is_block (struct attribute
*attr
)
11379 return (attr
== NULL
? 0 :
11380 attr
->form
== DW_FORM_block1
11381 || attr
->form
== DW_FORM_block2
11382 || attr
->form
== DW_FORM_block4
11383 || attr
->form
== DW_FORM_block
);
11386 /* Return non-zero if ATTR's value is a section offset --- classes
11387 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11388 You may use DW_UNSND (attr) to retrieve such offsets.
11390 Section 7.5.4, "Attribute Encodings", explains that no attribute
11391 may have a value that belongs to more than one of these classes; it
11392 would be ambiguous if we did, because we use the same forms for all
11395 attr_form_is_section_offset (struct attribute
*attr
)
11397 return (attr
->form
== DW_FORM_data4
11398 || attr
->form
== DW_FORM_data8
);
11402 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11403 zero otherwise. When this function returns true, you can apply
11404 dwarf2_get_attr_constant_value to it.
11406 However, note that for some attributes you must check
11407 attr_form_is_section_offset before using this test. DW_FORM_data4
11408 and DW_FORM_data8 are members of both the constant class, and of
11409 the classes that contain offsets into other debug sections
11410 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11411 that, if an attribute's can be either a constant or one of the
11412 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11413 taken as section offsets, not constants. */
11415 attr_form_is_constant (struct attribute
*attr
)
11417 switch (attr
->form
)
11419 case DW_FORM_sdata
:
11420 case DW_FORM_udata
:
11421 case DW_FORM_data1
:
11422 case DW_FORM_data2
:
11423 case DW_FORM_data4
:
11424 case DW_FORM_data8
:
11432 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11433 struct dwarf2_cu
*cu
)
11435 if (attr_form_is_section_offset (attr
)
11436 /* ".debug_loc" may not exist at all, or the offset may be outside
11437 the section. If so, fall through to the complaint in the
11439 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11441 struct dwarf2_loclist_baton
*baton
;
11443 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11444 sizeof (struct dwarf2_loclist_baton
));
11445 baton
->per_cu
= cu
->per_cu
;
11446 gdb_assert (baton
->per_cu
);
11448 /* We don't know how long the location list is, but make sure we
11449 don't run off the edge of the section. */
11450 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11451 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11452 baton
->base_address
= cu
->base_address
;
11453 if (cu
->base_known
== 0)
11454 complaint (&symfile_complaints
,
11455 _("Location list used without specifying the CU base address."));
11457 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11458 SYMBOL_LOCATION_BATON (sym
) = baton
;
11462 struct dwarf2_locexpr_baton
*baton
;
11464 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11465 sizeof (struct dwarf2_locexpr_baton
));
11466 baton
->per_cu
= cu
->per_cu
;
11467 gdb_assert (baton
->per_cu
);
11469 if (attr_form_is_block (attr
))
11471 /* Note that we're just copying the block's data pointer
11472 here, not the actual data. We're still pointing into the
11473 info_buffer for SYM's objfile; right now we never release
11474 that buffer, but when we do clean up properly this may
11476 baton
->size
= DW_BLOCK (attr
)->size
;
11477 baton
->data
= DW_BLOCK (attr
)->data
;
11481 dwarf2_invalid_attrib_class_complaint ("location description",
11482 SYMBOL_NATURAL_NAME (sym
));
11484 baton
->data
= NULL
;
11487 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11488 SYMBOL_LOCATION_BATON (sym
) = baton
;
11492 /* Return the OBJFILE associated with the compilation unit CU. */
11495 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11497 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11499 /* Return the master objfile, so that we can report and look up the
11500 correct file containing this variable. */
11501 if (objfile
->separate_debug_objfile_backlink
)
11502 objfile
= objfile
->separate_debug_objfile_backlink
;
11507 /* Return the address size given in the compilation unit header for CU. */
11510 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11513 return per_cu
->cu
->header
.addr_size
;
11516 /* If the CU is not currently read in, we re-read its header. */
11517 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11518 struct dwarf2_per_objfile
*per_objfile
11519 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11520 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11522 struct comp_unit_head cu_header
;
11523 memset (&cu_header
, 0, sizeof cu_header
);
11524 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11525 return cu_header
.addr_size
;
11529 /* Locate the .debug_info compilation unit from CU's objfile which contains
11530 the DIE at OFFSET. Raises an error on failure. */
11532 static struct dwarf2_per_cu_data
*
11533 dwarf2_find_containing_comp_unit (unsigned int offset
,
11534 struct objfile
*objfile
)
11536 struct dwarf2_per_cu_data
*this_cu
;
11540 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11543 int mid
= low
+ (high
- low
) / 2;
11544 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11549 gdb_assert (low
== high
);
11550 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11553 error (_("Dwarf Error: could not find partial DIE containing "
11554 "offset 0x%lx [in module %s]"),
11555 (long) offset
, bfd_get_filename (objfile
->obfd
));
11557 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11558 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11562 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11563 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11564 && offset
>= this_cu
->offset
+ this_cu
->length
)
11565 error (_("invalid dwarf2 offset %u"), offset
);
11566 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11571 /* Locate the compilation unit from OBJFILE which is located at exactly
11572 OFFSET. Raises an error on failure. */
11574 static struct dwarf2_per_cu_data
*
11575 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11577 struct dwarf2_per_cu_data
*this_cu
;
11578 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11579 if (this_cu
->offset
!= offset
)
11580 error (_("no compilation unit with offset %u."), offset
);
11584 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11586 static struct dwarf2_cu
*
11587 alloc_one_comp_unit (struct objfile
*objfile
)
11589 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11590 cu
->objfile
= objfile
;
11591 obstack_init (&cu
->comp_unit_obstack
);
11595 /* Release one cached compilation unit, CU. We unlink it from the tree
11596 of compilation units, but we don't remove it from the read_in_chain;
11597 the caller is responsible for that.
11598 NOTE: DATA is a void * because this function is also used as a
11599 cleanup routine. */
11602 free_one_comp_unit (void *data
)
11604 struct dwarf2_cu
*cu
= data
;
11606 if (cu
->per_cu
!= NULL
)
11607 cu
->per_cu
->cu
= NULL
;
11610 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11615 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11616 when we're finished with it. We can't free the pointer itself, but be
11617 sure to unlink it from the cache. Also release any associated storage
11618 and perform cache maintenance.
11620 Only used during partial symbol parsing. */
11623 free_stack_comp_unit (void *data
)
11625 struct dwarf2_cu
*cu
= data
;
11627 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11628 cu
->partial_dies
= NULL
;
11630 if (cu
->per_cu
!= NULL
)
11632 /* This compilation unit is on the stack in our caller, so we
11633 should not xfree it. Just unlink it. */
11634 cu
->per_cu
->cu
= NULL
;
11637 /* If we had a per-cu pointer, then we may have other compilation
11638 units loaded, so age them now. */
11639 age_cached_comp_units ();
11643 /* Free all cached compilation units. */
11646 free_cached_comp_units (void *data
)
11648 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11650 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11651 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11652 while (per_cu
!= NULL
)
11654 struct dwarf2_per_cu_data
*next_cu
;
11656 next_cu
= per_cu
->cu
->read_in_chain
;
11658 free_one_comp_unit (per_cu
->cu
);
11659 *last_chain
= next_cu
;
11665 /* Increase the age counter on each cached compilation unit, and free
11666 any that are too old. */
11669 age_cached_comp_units (void)
11671 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11673 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11674 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11675 while (per_cu
!= NULL
)
11677 per_cu
->cu
->last_used
++;
11678 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11679 dwarf2_mark (per_cu
->cu
);
11680 per_cu
= per_cu
->cu
->read_in_chain
;
11683 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11684 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11685 while (per_cu
!= NULL
)
11687 struct dwarf2_per_cu_data
*next_cu
;
11689 next_cu
= per_cu
->cu
->read_in_chain
;
11691 if (!per_cu
->cu
->mark
)
11693 free_one_comp_unit (per_cu
->cu
);
11694 *last_chain
= next_cu
;
11697 last_chain
= &per_cu
->cu
->read_in_chain
;
11703 /* Remove a single compilation unit from the cache. */
11706 free_one_cached_comp_unit (void *target_cu
)
11708 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11710 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11711 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11712 while (per_cu
!= NULL
)
11714 struct dwarf2_per_cu_data
*next_cu
;
11716 next_cu
= per_cu
->cu
->read_in_chain
;
11718 if (per_cu
->cu
== target_cu
)
11720 free_one_comp_unit (per_cu
->cu
);
11721 *last_chain
= next_cu
;
11725 last_chain
= &per_cu
->cu
->read_in_chain
;
11731 /* Release all extra memory associated with OBJFILE. */
11734 dwarf2_free_objfile (struct objfile
*objfile
)
11736 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11738 if (dwarf2_per_objfile
== NULL
)
11741 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11742 free_cached_comp_units (NULL
);
11744 /* Everything else should be on the objfile obstack. */
11747 /* A pair of DIE offset and GDB type pointer. We store these
11748 in a hash table separate from the DIEs, and preserve them
11749 when the DIEs are flushed out of cache. */
11751 struct dwarf2_offset_and_type
11753 unsigned int offset
;
11757 /* Hash function for a dwarf2_offset_and_type. */
11760 offset_and_type_hash (const void *item
)
11762 const struct dwarf2_offset_and_type
*ofs
= item
;
11763 return ofs
->offset
;
11766 /* Equality function for a dwarf2_offset_and_type. */
11769 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11771 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11772 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11773 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11776 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11777 table if necessary. For convenience, return TYPE. */
11779 static struct type
*
11780 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11782 struct dwarf2_offset_and_type
**slot
, ofs
;
11784 /* For Ada types, make sure that the gnat-specific data is always
11785 initialized (if not already set). There are a few types where
11786 we should not be doing so, because the type-specific area is
11787 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11788 where the type-specific area is used to store the floatformat).
11789 But this is not a problem, because the gnat-specific information
11790 is actually not needed for these types. */
11791 if (need_gnat_info (cu
)
11792 && TYPE_CODE (type
) != TYPE_CODE_FUNC
11793 && TYPE_CODE (type
) != TYPE_CODE_FLT
11794 && !HAVE_GNAT_AUX_INFO (type
))
11795 INIT_GNAT_SPECIFIC (type
);
11797 if (cu
->type_hash
== NULL
)
11799 gdb_assert (cu
->per_cu
!= NULL
);
11800 cu
->per_cu
->type_hash
11801 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11802 offset_and_type_hash
,
11803 offset_and_type_eq
,
11805 &cu
->objfile
->objfile_obstack
,
11806 hashtab_obstack_allocate
,
11807 dummy_obstack_deallocate
);
11808 cu
->type_hash
= cu
->per_cu
->type_hash
;
11811 ofs
.offset
= die
->offset
;
11813 slot
= (struct dwarf2_offset_and_type
**)
11814 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11815 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11820 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11821 not have a saved type. */
11823 static struct type
*
11824 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11826 struct dwarf2_offset_and_type
*slot
, ofs
;
11827 htab_t type_hash
= cu
->type_hash
;
11829 if (type_hash
== NULL
)
11832 ofs
.offset
= die
->offset
;
11833 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11840 /* Add a dependence relationship from CU to REF_PER_CU. */
11843 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11844 struct dwarf2_per_cu_data
*ref_per_cu
)
11848 if (cu
->dependencies
== NULL
)
11850 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11851 NULL
, &cu
->comp_unit_obstack
,
11852 hashtab_obstack_allocate
,
11853 dummy_obstack_deallocate
);
11855 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11857 *slot
= ref_per_cu
;
11860 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11861 Set the mark field in every compilation unit in the
11862 cache that we must keep because we are keeping CU. */
11865 dwarf2_mark_helper (void **slot
, void *data
)
11867 struct dwarf2_per_cu_data
*per_cu
;
11869 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11870 if (per_cu
->cu
->mark
)
11872 per_cu
->cu
->mark
= 1;
11874 if (per_cu
->cu
->dependencies
!= NULL
)
11875 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11880 /* Set the mark field in CU and in every other compilation unit in the
11881 cache that we must keep because we are keeping CU. */
11884 dwarf2_mark (struct dwarf2_cu
*cu
)
11889 if (cu
->dependencies
!= NULL
)
11890 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11894 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11898 per_cu
->cu
->mark
= 0;
11899 per_cu
= per_cu
->cu
->read_in_chain
;
11903 /* Trivial hash function for partial_die_info: the hash value of a DIE
11904 is its offset in .debug_info for this objfile. */
11907 partial_die_hash (const void *item
)
11909 const struct partial_die_info
*part_die
= item
;
11910 return part_die
->offset
;
11913 /* Trivial comparison function for partial_die_info structures: two DIEs
11914 are equal if they have the same offset. */
11917 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11919 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11920 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11921 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11924 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11925 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11928 set_dwarf2_cmd (char *args
, int from_tty
)
11930 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11934 show_dwarf2_cmd (char *args
, int from_tty
)
11936 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11939 /* If section described by INFO was mmapped, munmap it now. */
11942 munmap_section_buffer (struct dwarf2_section_info
*info
)
11944 if (info
->was_mmapped
)
11947 intptr_t begin
= (intptr_t) info
->buffer
;
11948 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11949 size_t map_length
= info
->size
+ begin
- map_begin
;
11950 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11952 /* Without HAVE_MMAP, we should never be here to begin with. */
11958 /* munmap debug sections for OBJFILE, if necessary. */
11961 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11963 struct dwarf2_per_objfile
*data
= d
;
11964 munmap_section_buffer (&data
->info
);
11965 munmap_section_buffer (&data
->abbrev
);
11966 munmap_section_buffer (&data
->line
);
11967 munmap_section_buffer (&data
->str
);
11968 munmap_section_buffer (&data
->macinfo
);
11969 munmap_section_buffer (&data
->ranges
);
11970 munmap_section_buffer (&data
->loc
);
11971 munmap_section_buffer (&data
->frame
);
11972 munmap_section_buffer (&data
->eh_frame
);
11975 void _initialize_dwarf2_read (void);
11978 _initialize_dwarf2_read (void)
11980 dwarf2_objfile_data_key
11981 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11983 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11984 Set DWARF 2 specific variables.\n\
11985 Configure DWARF 2 variables such as the cache size"),
11986 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11987 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11989 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11990 Show DWARF 2 specific variables\n\
11991 Show DWARF 2 variables such as the cache size"),
11992 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11993 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11995 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11996 &dwarf2_max_cache_age
, _("\
11997 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11998 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11999 A higher limit means that cached compilation units will be stored\n\
12000 in memory longer, and more total memory will be used. Zero disables\n\
12001 caching, which can slow down startup."),
12003 show_dwarf2_max_cache_age
,
12004 &set_dwarf2_cmdlist
,
12005 &show_dwarf2_cmdlist
);
12007 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12008 Set debugging of the dwarf2 DIE reader."), _("\
12009 Show debugging of the dwarf2 DIE reader."), _("\
12010 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12011 The value is the maximum depth to print."),
12014 &setdebuglist
, &showdebuglist
);