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 (objfile
, 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
;
3390 const char *import_prefix
;
3391 char *canonical_name
;
3393 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3394 if (import_attr
== NULL
)
3396 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3397 dwarf_tag_name (die
->tag
));
3402 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3403 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3404 if (imported_name
== NULL
)
3406 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3408 The import in the following code:
3422 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3423 <52> DW_AT_decl_file : 1
3424 <53> DW_AT_decl_line : 6
3425 <54> DW_AT_import : <0x75>
3426 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3428 <5b> DW_AT_decl_file : 1
3429 <5c> DW_AT_decl_line : 2
3430 <5d> DW_AT_type : <0x6e>
3432 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3433 <76> DW_AT_byte_size : 4
3434 <77> DW_AT_encoding : 5 (signed)
3436 imports the wrong die ( 0x75 instead of 0x58 ).
3437 This case will be ignored until the gcc bug is fixed. */
3441 /* Figure out the local name after import. */
3442 import_alias
= dwarf2_name (die
, cu
);
3444 /* Figure out where the statement is being imported to. */
3445 import_prefix
= determine_prefix (die
, cu
);
3447 /* Figure out what the scope of the imported die is and prepend it
3448 to the name of the imported die. */
3449 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3451 if (strlen (imported_name_prefix
) > 0)
3453 canonical_name
= alloca (strlen (imported_name_prefix
)
3454 + 2 + strlen (imported_name
) + 1);
3455 strcpy (canonical_name
, imported_name_prefix
);
3456 strcat (canonical_name
, "::");
3457 strcat (canonical_name
, imported_name
);
3461 canonical_name
= alloca (strlen (imported_name
) + 1);
3462 strcpy (canonical_name
, imported_name
);
3465 using_directives
= cp_add_using (import_prefix
,
3472 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3474 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3478 free_cu_line_header (void *arg
)
3480 struct dwarf2_cu
*cu
= arg
;
3482 free_line_header (cu
->line_header
);
3483 cu
->line_header
= NULL
;
3487 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3489 struct objfile
*objfile
= cu
->objfile
;
3490 struct comp_unit_head
*cu_header
= &cu
->header
;
3491 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3492 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3493 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3494 struct attribute
*attr
;
3496 char *comp_dir
= NULL
;
3497 struct die_info
*child_die
;
3498 bfd
*abfd
= objfile
->obfd
;
3499 struct line_header
*line_header
= 0;
3502 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3504 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3506 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3507 from finish_block. */
3508 if (lowpc
== ((CORE_ADDR
) -1))
3513 /* Find the filename. Do not use dwarf2_name here, since the filename
3514 is not a source language identifier. */
3515 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3518 name
= DW_STRING (attr
);
3521 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3523 comp_dir
= DW_STRING (attr
);
3524 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3526 comp_dir
= ldirname (name
);
3527 if (comp_dir
!= NULL
)
3528 make_cleanup (xfree
, comp_dir
);
3530 if (comp_dir
!= NULL
)
3532 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3533 directory, get rid of it. */
3534 char *cp
= strchr (comp_dir
, ':');
3536 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3543 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3546 set_cu_language (DW_UNSND (attr
), cu
);
3549 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3551 cu
->producer
= DW_STRING (attr
);
3553 /* We assume that we're processing GCC output. */
3554 processing_gcc_compilation
= 2;
3556 processing_has_namespace_info
= 0;
3558 start_symtab (name
, comp_dir
, lowpc
);
3559 record_debugformat ("DWARF 2");
3560 record_producer (cu
->producer
);
3562 initialize_cu_func_list (cu
);
3564 /* Decode line number information if present. We do this before
3565 processing child DIEs, so that the line header table is available
3566 for DW_AT_decl_file. */
3567 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3570 unsigned int line_offset
= DW_UNSND (attr
);
3571 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3574 cu
->line_header
= line_header
;
3575 make_cleanup (free_cu_line_header
, cu
);
3576 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3580 /* Process all dies in compilation unit. */
3581 if (die
->child
!= NULL
)
3583 child_die
= die
->child
;
3584 while (child_die
&& child_die
->tag
)
3586 process_die (child_die
, cu
);
3587 child_die
= sibling_die (child_die
);
3591 /* Decode macro information, if present. Dwarf 2 macro information
3592 refers to information in the line number info statement program
3593 header, so we can only read it if we've read the header
3595 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3596 if (attr
&& line_header
)
3598 unsigned int macro_offset
= DW_UNSND (attr
);
3599 dwarf_decode_macros (line_header
, macro_offset
,
3600 comp_dir
, abfd
, cu
);
3602 do_cleanups (back_to
);
3605 /* For TUs we want to skip the first top level sibling if it's not the
3606 actual type being defined by this TU. In this case the first top
3607 level sibling is there to provide context only. */
3610 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3612 struct objfile
*objfile
= cu
->objfile
;
3613 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3615 struct attribute
*attr
;
3617 char *comp_dir
= NULL
;
3618 struct die_info
*child_die
;
3619 bfd
*abfd
= objfile
->obfd
;
3620 struct line_header
*line_header
= 0;
3622 /* start_symtab needs a low pc, but we don't really have one.
3623 Do what read_file_scope would do in the absence of such info. */
3624 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3626 /* Find the filename. Do not use dwarf2_name here, since the filename
3627 is not a source language identifier. */
3628 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3630 name
= DW_STRING (attr
);
3632 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3634 comp_dir
= DW_STRING (attr
);
3635 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3637 comp_dir
= ldirname (name
);
3638 if (comp_dir
!= NULL
)
3639 make_cleanup (xfree
, comp_dir
);
3645 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3647 set_cu_language (DW_UNSND (attr
), cu
);
3649 /* This isn't technically needed today. It is done for symmetry
3650 with read_file_scope. */
3651 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3653 cu
->producer
= DW_STRING (attr
);
3655 /* We assume that we're processing GCC output. */
3656 processing_gcc_compilation
= 2;
3658 processing_has_namespace_info
= 0;
3660 start_symtab (name
, comp_dir
, lowpc
);
3661 record_debugformat ("DWARF 2");
3662 record_producer (cu
->producer
);
3664 /* Process the dies in the type unit. */
3665 if (die
->child
== NULL
)
3667 dump_die_for_error (die
);
3668 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3669 bfd_get_filename (abfd
));
3672 child_die
= die
->child
;
3674 while (child_die
&& child_die
->tag
)
3676 process_die (child_die
, cu
);
3678 child_die
= sibling_die (child_die
);
3681 do_cleanups (back_to
);
3685 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3686 struct dwarf2_cu
*cu
)
3688 struct function_range
*thisfn
;
3690 thisfn
= (struct function_range
*)
3691 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3692 thisfn
->name
= name
;
3693 thisfn
->lowpc
= lowpc
;
3694 thisfn
->highpc
= highpc
;
3695 thisfn
->seen_line
= 0;
3696 thisfn
->next
= NULL
;
3698 if (cu
->last_fn
== NULL
)
3699 cu
->first_fn
= thisfn
;
3701 cu
->last_fn
->next
= thisfn
;
3703 cu
->last_fn
= thisfn
;
3706 /* qsort helper for inherit_abstract_dies. */
3709 unsigned_int_compar (const void *ap
, const void *bp
)
3711 unsigned int a
= *(unsigned int *) ap
;
3712 unsigned int b
= *(unsigned int *) bp
;
3714 return (a
> b
) - (b
> a
);
3717 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3718 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3719 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3722 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3724 struct die_info
*child_die
;
3725 unsigned die_children_count
;
3726 /* CU offsets which were referenced by children of the current DIE. */
3728 unsigned *offsets_end
, *offsetp
;
3729 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3730 struct die_info
*origin_die
;
3731 /* Iterator of the ORIGIN_DIE children. */
3732 struct die_info
*origin_child_die
;
3733 struct cleanup
*cleanups
;
3734 struct attribute
*attr
;
3736 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3740 origin_die
= follow_die_ref (die
, attr
, &cu
);
3741 if (die
->tag
!= origin_die
->tag
3742 && !(die
->tag
== DW_TAG_inlined_subroutine
3743 && origin_die
->tag
== DW_TAG_subprogram
))
3744 complaint (&symfile_complaints
,
3745 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3746 die
->offset
, origin_die
->offset
);
3748 child_die
= die
->child
;
3749 die_children_count
= 0;
3750 while (child_die
&& child_die
->tag
)
3752 child_die
= sibling_die (child_die
);
3753 die_children_count
++;
3755 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3756 cleanups
= make_cleanup (xfree
, offsets
);
3758 offsets_end
= offsets
;
3759 child_die
= die
->child
;
3760 while (child_die
&& child_die
->tag
)
3762 /* For each CHILD_DIE, find the corresponding child of
3763 ORIGIN_DIE. If there is more than one layer of
3764 DW_AT_abstract_origin, follow them all; there shouldn't be,
3765 but GCC versions at least through 4.4 generate this (GCC PR
3767 struct die_info
*child_origin_die
= child_die
;
3770 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3773 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3776 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3777 counterpart may exist. */
3778 if (child_origin_die
!= child_die
)
3780 if (child_die
->tag
!= child_origin_die
->tag
3781 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3782 && child_origin_die
->tag
== DW_TAG_subprogram
))
3783 complaint (&symfile_complaints
,
3784 _("Child DIE 0x%x and its abstract origin 0x%x have "
3785 "different tags"), child_die
->offset
,
3786 child_origin_die
->offset
);
3787 if (child_origin_die
->parent
!= origin_die
)
3788 complaint (&symfile_complaints
,
3789 _("Child DIE 0x%x and its abstract origin 0x%x have "
3790 "different parents"), child_die
->offset
,
3791 child_origin_die
->offset
);
3793 *offsets_end
++ = child_origin_die
->offset
;
3795 child_die
= sibling_die (child_die
);
3797 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3798 unsigned_int_compar
);
3799 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3800 if (offsetp
[-1] == *offsetp
)
3801 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3802 "to DIE 0x%x as their abstract origin"),
3803 die
->offset
, *offsetp
);
3806 origin_child_die
= origin_die
->child
;
3807 while (origin_child_die
&& origin_child_die
->tag
)
3809 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3810 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3812 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3814 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3815 process_die (origin_child_die
, cu
);
3817 origin_child_die
= sibling_die (origin_child_die
);
3820 do_cleanups (cleanups
);
3824 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3826 struct objfile
*objfile
= cu
->objfile
;
3827 struct context_stack
*new;
3830 struct die_info
*child_die
;
3831 struct attribute
*attr
, *call_line
, *call_file
;
3834 struct block
*block
;
3835 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3839 /* If we do not have call site information, we can't show the
3840 caller of this inlined function. That's too confusing, so
3841 only use the scope for local variables. */
3842 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3843 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3844 if (call_line
== NULL
|| call_file
== NULL
)
3846 read_lexical_block_scope (die
, cu
);
3851 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3853 name
= dwarf2_linkage_name (die
, cu
);
3855 /* Ignore functions with missing or empty names and functions with
3856 missing or invalid low and high pc attributes. */
3857 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3863 /* Record the function range for dwarf_decode_lines. */
3864 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3866 new = push_context (0, lowpc
);
3867 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3869 /* If there is a location expression for DW_AT_frame_base, record
3871 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3873 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3874 expression is being recorded directly in the function's symbol
3875 and not in a separate frame-base object. I guess this hack is
3876 to avoid adding some sort of frame-base adjunct/annex to the
3877 function's symbol :-(. The problem with doing this is that it
3878 results in a function symbol with a location expression that
3879 has nothing to do with the location of the function, ouch! The
3880 relationship should be: a function's symbol has-a frame base; a
3881 frame-base has-a location expression. */
3882 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3884 cu
->list_in_scope
= &local_symbols
;
3886 if (die
->child
!= NULL
)
3888 child_die
= die
->child
;
3889 while (child_die
&& child_die
->tag
)
3891 process_die (child_die
, cu
);
3892 child_die
= sibling_die (child_die
);
3896 inherit_abstract_dies (die
, cu
);
3898 new = pop_context ();
3899 /* Make a block for the local symbols within. */
3900 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3901 lowpc
, highpc
, objfile
);
3903 /* For C++, set the block's scope. */
3904 if (cu
->language
== language_cplus
)
3905 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3906 determine_prefix (die
, cu
),
3907 processing_has_namespace_info
);
3909 /* If we have address ranges, record them. */
3910 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3912 /* In C++, we can have functions nested inside functions (e.g., when
3913 a function declares a class that has methods). This means that
3914 when we finish processing a function scope, we may need to go
3915 back to building a containing block's symbol lists. */
3916 local_symbols
= new->locals
;
3917 param_symbols
= new->params
;
3918 using_directives
= new->using_directives
;
3920 /* If we've finished processing a top-level function, subsequent
3921 symbols go in the file symbol list. */
3922 if (outermost_context_p ())
3923 cu
->list_in_scope
= &file_symbols
;
3926 /* Process all the DIES contained within a lexical block scope. Start
3927 a new scope, process the dies, and then close the scope. */
3930 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3932 struct objfile
*objfile
= cu
->objfile
;
3933 struct context_stack
*new;
3934 CORE_ADDR lowpc
, highpc
;
3935 struct die_info
*child_die
;
3938 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3940 /* Ignore blocks with missing or invalid low and high pc attributes. */
3941 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3942 as multiple lexical blocks? Handling children in a sane way would
3943 be nasty. Might be easier to properly extend generic blocks to
3945 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3950 push_context (0, lowpc
);
3951 if (die
->child
!= NULL
)
3953 child_die
= die
->child
;
3954 while (child_die
&& child_die
->tag
)
3956 process_die (child_die
, cu
);
3957 child_die
= sibling_die (child_die
);
3960 new = pop_context ();
3962 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
3965 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3968 /* Note that recording ranges after traversing children, as we
3969 do here, means that recording a parent's ranges entails
3970 walking across all its children's ranges as they appear in
3971 the address map, which is quadratic behavior.
3973 It would be nicer to record the parent's ranges before
3974 traversing its children, simply overriding whatever you find
3975 there. But since we don't even decide whether to create a
3976 block until after we've traversed its children, that's hard
3978 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3980 local_symbols
= new->locals
;
3981 using_directives
= new->using_directives
;
3984 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3985 Return 1 if the attributes are present and valid, otherwise, return 0.
3986 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3989 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3990 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3991 struct partial_symtab
*ranges_pst
)
3993 struct objfile
*objfile
= cu
->objfile
;
3994 struct comp_unit_head
*cu_header
= &cu
->header
;
3995 bfd
*obfd
= objfile
->obfd
;
3996 unsigned int addr_size
= cu_header
->addr_size
;
3997 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3998 /* Base address selection entry. */
4009 found_base
= cu
->base_known
;
4010 base
= cu
->base_address
;
4012 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4014 complaint (&symfile_complaints
,
4015 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4019 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4021 /* Read in the largest possible address. */
4022 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4023 if ((marker
& mask
) == mask
)
4025 /* If we found the largest possible address, then
4026 read the base address. */
4027 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4028 buffer
+= 2 * addr_size
;
4029 offset
+= 2 * addr_size
;
4035 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4039 CORE_ADDR range_beginning
, range_end
;
4041 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4042 buffer
+= addr_size
;
4043 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4044 buffer
+= addr_size
;
4045 offset
+= 2 * addr_size
;
4047 /* An end of list marker is a pair of zero addresses. */
4048 if (range_beginning
== 0 && range_end
== 0)
4049 /* Found the end of list entry. */
4052 /* Each base address selection entry is a pair of 2 values.
4053 The first is the largest possible address, the second is
4054 the base address. Check for a base address here. */
4055 if ((range_beginning
& mask
) == mask
)
4057 /* If we found the largest possible address, then
4058 read the base address. */
4059 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4066 /* We have no valid base address for the ranges
4068 complaint (&symfile_complaints
,
4069 _("Invalid .debug_ranges data (no base address)"));
4073 range_beginning
+= base
;
4076 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4077 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4078 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4081 /* FIXME: This is recording everything as a low-high
4082 segment of consecutive addresses. We should have a
4083 data structure for discontiguous block ranges
4087 low
= range_beginning
;
4093 if (range_beginning
< low
)
4094 low
= range_beginning
;
4095 if (range_end
> high
)
4101 /* If the first entry is an end-of-list marker, the range
4102 describes an empty scope, i.e. no instructions. */
4108 *high_return
= high
;
4112 /* Get low and high pc attributes from a die. Return 1 if the attributes
4113 are present and valid, otherwise, return 0. Return -1 if the range is
4114 discontinuous, i.e. derived from DW_AT_ranges information. */
4116 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4117 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4118 struct partial_symtab
*pst
)
4120 struct attribute
*attr
;
4125 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4128 high
= DW_ADDR (attr
);
4129 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4131 low
= DW_ADDR (attr
);
4133 /* Found high w/o low attribute. */
4136 /* Found consecutive range of addresses. */
4141 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4144 /* Value of the DW_AT_ranges attribute is the offset in the
4145 .debug_ranges section. */
4146 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4148 /* Found discontinuous range of addresses. */
4156 /* When using the GNU linker, .gnu.linkonce. sections are used to
4157 eliminate duplicate copies of functions and vtables and such.
4158 The linker will arbitrarily choose one and discard the others.
4159 The AT_*_pc values for such functions refer to local labels in
4160 these sections. If the section from that file was discarded, the
4161 labels are not in the output, so the relocs get a value of 0.
4162 If this is a discarded function, mark the pc bounds as invalid,
4163 so that GDB will ignore it. */
4164 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4172 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4173 its low and high PC addresses. Do nothing if these addresses could not
4174 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4175 and HIGHPC to the high address if greater than HIGHPC. */
4178 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4179 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4180 struct dwarf2_cu
*cu
)
4182 CORE_ADDR low
, high
;
4183 struct die_info
*child
= die
->child
;
4185 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4187 *lowpc
= min (*lowpc
, low
);
4188 *highpc
= max (*highpc
, high
);
4191 /* If the language does not allow nested subprograms (either inside
4192 subprograms or lexical blocks), we're done. */
4193 if (cu
->language
!= language_ada
)
4196 /* Check all the children of the given DIE. If it contains nested
4197 subprograms, then check their pc bounds. Likewise, we need to
4198 check lexical blocks as well, as they may also contain subprogram
4200 while (child
&& child
->tag
)
4202 if (child
->tag
== DW_TAG_subprogram
4203 || child
->tag
== DW_TAG_lexical_block
)
4204 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4205 child
= sibling_die (child
);
4209 /* Get the low and high pc's represented by the scope DIE, and store
4210 them in *LOWPC and *HIGHPC. If the correct values can't be
4211 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4214 get_scope_pc_bounds (struct die_info
*die
,
4215 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4216 struct dwarf2_cu
*cu
)
4218 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4219 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4220 CORE_ADDR current_low
, current_high
;
4222 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4224 best_low
= current_low
;
4225 best_high
= current_high
;
4229 struct die_info
*child
= die
->child
;
4231 while (child
&& child
->tag
)
4233 switch (child
->tag
) {
4234 case DW_TAG_subprogram
:
4235 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4237 case DW_TAG_namespace
:
4238 /* FIXME: carlton/2004-01-16: Should we do this for
4239 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4240 that current GCC's always emit the DIEs corresponding
4241 to definitions of methods of classes as children of a
4242 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4243 the DIEs giving the declarations, which could be
4244 anywhere). But I don't see any reason why the
4245 standards says that they have to be there. */
4246 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4248 if (current_low
!= ((CORE_ADDR
) -1))
4250 best_low
= min (best_low
, current_low
);
4251 best_high
= max (best_high
, current_high
);
4259 child
= sibling_die (child
);
4264 *highpc
= best_high
;
4267 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4270 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4271 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4273 struct attribute
*attr
;
4275 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4278 CORE_ADDR high
= DW_ADDR (attr
);
4279 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4282 CORE_ADDR low
= DW_ADDR (attr
);
4283 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4287 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4290 bfd
*obfd
= cu
->objfile
->obfd
;
4292 /* The value of the DW_AT_ranges attribute is the offset of the
4293 address range list in the .debug_ranges section. */
4294 unsigned long offset
= DW_UNSND (attr
);
4295 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4297 /* For some target architectures, but not others, the
4298 read_address function sign-extends the addresses it returns.
4299 To recognize base address selection entries, we need a
4301 unsigned int addr_size
= cu
->header
.addr_size
;
4302 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4304 /* The base address, to which the next pair is relative. Note
4305 that this 'base' is a DWARF concept: most entries in a range
4306 list are relative, to reduce the number of relocs against the
4307 debugging information. This is separate from this function's
4308 'baseaddr' argument, which GDB uses to relocate debugging
4309 information from a shared library based on the address at
4310 which the library was loaded. */
4311 CORE_ADDR base
= cu
->base_address
;
4312 int base_known
= cu
->base_known
;
4314 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4316 complaint (&symfile_complaints
,
4317 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4324 unsigned int bytes_read
;
4325 CORE_ADDR start
, end
;
4327 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4328 buffer
+= bytes_read
;
4329 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4330 buffer
+= bytes_read
;
4332 /* Did we find the end of the range list? */
4333 if (start
== 0 && end
== 0)
4336 /* Did we find a base address selection entry? */
4337 else if ((start
& base_select_mask
) == base_select_mask
)
4343 /* We found an ordinary address range. */
4348 complaint (&symfile_complaints
,
4349 _("Invalid .debug_ranges data (no base address)"));
4353 record_block_range (block
,
4354 baseaddr
+ base
+ start
,
4355 baseaddr
+ base
+ end
- 1);
4361 /* Add an aggregate field to the field list. */
4364 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4365 struct dwarf2_cu
*cu
)
4367 struct objfile
*objfile
= cu
->objfile
;
4368 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4369 struct nextfield
*new_field
;
4370 struct attribute
*attr
;
4372 char *fieldname
= "";
4374 /* Allocate a new field list entry and link it in. */
4375 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4376 make_cleanup (xfree
, new_field
);
4377 memset (new_field
, 0, sizeof (struct nextfield
));
4379 if (die
->tag
== DW_TAG_inheritance
)
4381 new_field
->next
= fip
->baseclasses
;
4382 fip
->baseclasses
= new_field
;
4386 new_field
->next
= fip
->fields
;
4387 fip
->fields
= new_field
;
4391 /* Handle accessibility and virtuality of field.
4392 The default accessibility for members is public, the default
4393 accessibility for inheritance is private. */
4394 if (die
->tag
!= DW_TAG_inheritance
)
4395 new_field
->accessibility
= DW_ACCESS_public
;
4397 new_field
->accessibility
= DW_ACCESS_private
;
4398 new_field
->virtuality
= DW_VIRTUALITY_none
;
4400 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4402 new_field
->accessibility
= DW_UNSND (attr
);
4403 if (new_field
->accessibility
!= DW_ACCESS_public
)
4404 fip
->non_public_fields
= 1;
4405 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4407 new_field
->virtuality
= DW_UNSND (attr
);
4409 fp
= &new_field
->field
;
4411 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4413 /* Data member other than a C++ static data member. */
4415 /* Get type of field. */
4416 fp
->type
= die_type (die
, cu
);
4418 SET_FIELD_BITPOS (*fp
, 0);
4420 /* Get bit size of field (zero if none). */
4421 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4424 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4428 FIELD_BITSIZE (*fp
) = 0;
4431 /* Get bit offset of field. */
4432 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4435 int byte_offset
= 0;
4437 if (attr_form_is_section_offset (attr
))
4438 dwarf2_complex_location_expr_complaint ();
4439 else if (attr_form_is_constant (attr
))
4440 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4441 else if (attr_form_is_block (attr
))
4442 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4444 dwarf2_complex_location_expr_complaint ();
4446 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4448 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4451 if (gdbarch_bits_big_endian (gdbarch
))
4453 /* For big endian bits, the DW_AT_bit_offset gives the
4454 additional bit offset from the MSB of the containing
4455 anonymous object to the MSB of the field. We don't
4456 have to do anything special since we don't need to
4457 know the size of the anonymous object. */
4458 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4462 /* For little endian bits, compute the bit offset to the
4463 MSB of the anonymous object, subtract off the number of
4464 bits from the MSB of the field to the MSB of the
4465 object, and then subtract off the number of bits of
4466 the field itself. The result is the bit offset of
4467 the LSB of the field. */
4469 int bit_offset
= DW_UNSND (attr
);
4471 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4474 /* The size of the anonymous object containing
4475 the bit field is explicit, so use the
4476 indicated size (in bytes). */
4477 anonymous_size
= DW_UNSND (attr
);
4481 /* The size of the anonymous object containing
4482 the bit field must be inferred from the type
4483 attribute of the data member containing the
4485 anonymous_size
= TYPE_LENGTH (fp
->type
);
4487 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4488 - bit_offset
- FIELD_BITSIZE (*fp
);
4492 /* Get name of field. */
4493 fieldname
= dwarf2_name (die
, cu
);
4494 if (fieldname
== NULL
)
4497 /* The name is already allocated along with this objfile, so we don't
4498 need to duplicate it for the type. */
4499 fp
->name
= fieldname
;
4501 /* Change accessibility for artificial fields (e.g. virtual table
4502 pointer or virtual base class pointer) to private. */
4503 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4505 FIELD_ARTIFICIAL (*fp
) = 1;
4506 new_field
->accessibility
= DW_ACCESS_private
;
4507 fip
->non_public_fields
= 1;
4510 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4512 /* C++ static member. */
4514 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4515 is a declaration, but all versions of G++ as of this writing
4516 (so through at least 3.2.1) incorrectly generate
4517 DW_TAG_variable tags. */
4521 /* Get name of field. */
4522 fieldname
= dwarf2_name (die
, cu
);
4523 if (fieldname
== NULL
)
4526 /* Get physical name. */
4527 physname
= dwarf2_linkage_name (die
, cu
);
4529 /* The name is already allocated along with this objfile, so we don't
4530 need to duplicate it for the type. */
4531 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4532 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4533 FIELD_NAME (*fp
) = fieldname
;
4535 else if (die
->tag
== DW_TAG_inheritance
)
4537 /* C++ base class field. */
4538 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4541 int byte_offset
= 0;
4543 if (attr_form_is_section_offset (attr
))
4544 dwarf2_complex_location_expr_complaint ();
4545 else if (attr_form_is_constant (attr
))
4546 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4547 else if (attr_form_is_block (attr
))
4548 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4550 dwarf2_complex_location_expr_complaint ();
4552 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4554 FIELD_BITSIZE (*fp
) = 0;
4555 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4556 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4557 fip
->nbaseclasses
++;
4561 /* Create the vector of fields, and attach it to the type. */
4564 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4565 struct dwarf2_cu
*cu
)
4567 int nfields
= fip
->nfields
;
4569 /* Record the field count, allocate space for the array of fields,
4570 and create blank accessibility bitfields if necessary. */
4571 TYPE_NFIELDS (type
) = nfields
;
4572 TYPE_FIELDS (type
) = (struct field
*)
4573 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4574 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4576 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4578 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4580 TYPE_FIELD_PRIVATE_BITS (type
) =
4581 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4582 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4584 TYPE_FIELD_PROTECTED_BITS (type
) =
4585 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4586 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4588 TYPE_FIELD_IGNORE_BITS (type
) =
4589 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4590 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4593 /* If the type has baseclasses, allocate and clear a bit vector for
4594 TYPE_FIELD_VIRTUAL_BITS. */
4595 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4597 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4598 unsigned char *pointer
;
4600 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4601 pointer
= TYPE_ALLOC (type
, num_bytes
);
4602 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4603 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4604 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4607 /* Copy the saved-up fields into the field vector. Start from the head
4608 of the list, adding to the tail of the field array, so that they end
4609 up in the same order in the array in which they were added to the list. */
4610 while (nfields
-- > 0)
4612 struct nextfield
*fieldp
;
4616 fieldp
= fip
->fields
;
4617 fip
->fields
= fieldp
->next
;
4621 fieldp
= fip
->baseclasses
;
4622 fip
->baseclasses
= fieldp
->next
;
4625 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4626 switch (fieldp
->accessibility
)
4628 case DW_ACCESS_private
:
4629 if (cu
->language
!= language_ada
)
4630 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4633 case DW_ACCESS_protected
:
4634 if (cu
->language
!= language_ada
)
4635 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4638 case DW_ACCESS_public
:
4642 /* Unknown accessibility. Complain and treat it as public. */
4644 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4645 fieldp
->accessibility
);
4649 if (nfields
< fip
->nbaseclasses
)
4651 switch (fieldp
->virtuality
)
4653 case DW_VIRTUALITY_virtual
:
4654 case DW_VIRTUALITY_pure_virtual
:
4655 if (cu
->language
== language_ada
)
4656 error ("unexpected virtuality in component of Ada type");
4657 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4664 /* Add a member function to the proper fieldlist. */
4667 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4668 struct type
*type
, struct dwarf2_cu
*cu
)
4670 struct objfile
*objfile
= cu
->objfile
;
4671 struct attribute
*attr
;
4672 struct fnfieldlist
*flp
;
4674 struct fn_field
*fnp
;
4677 struct nextfnfield
*new_fnfield
;
4678 struct type
*this_type
;
4680 if (cu
->language
== language_ada
)
4681 error ("unexpected member function in Ada type");
4683 /* Get name of member function. */
4684 fieldname
= dwarf2_name (die
, cu
);
4685 if (fieldname
== NULL
)
4688 /* Get the mangled name. */
4689 physname
= dwarf2_linkage_name (die
, cu
);
4691 /* Look up member function name in fieldlist. */
4692 for (i
= 0; i
< fip
->nfnfields
; i
++)
4694 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4698 /* Create new list element if necessary. */
4699 if (i
< fip
->nfnfields
)
4700 flp
= &fip
->fnfieldlists
[i
];
4703 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4705 fip
->fnfieldlists
= (struct fnfieldlist
*)
4706 xrealloc (fip
->fnfieldlists
,
4707 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4708 * sizeof (struct fnfieldlist
));
4709 if (fip
->nfnfields
== 0)
4710 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4712 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4713 flp
->name
= fieldname
;
4719 /* Create a new member function field and chain it to the field list
4721 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4722 make_cleanup (xfree
, new_fnfield
);
4723 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4724 new_fnfield
->next
= flp
->head
;
4725 flp
->head
= new_fnfield
;
4728 /* Fill in the member function field info. */
4729 fnp
= &new_fnfield
->fnfield
;
4730 /* The name is already allocated along with this objfile, so we don't
4731 need to duplicate it for the type. */
4732 fnp
->physname
= physname
? physname
: "";
4733 fnp
->type
= alloc_type (objfile
);
4734 this_type
= read_type_die (die
, cu
);
4735 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4737 int nparams
= TYPE_NFIELDS (this_type
);
4739 /* TYPE is the domain of this method, and THIS_TYPE is the type
4740 of the method itself (TYPE_CODE_METHOD). */
4741 smash_to_method_type (fnp
->type
, type
,
4742 TYPE_TARGET_TYPE (this_type
),
4743 TYPE_FIELDS (this_type
),
4744 TYPE_NFIELDS (this_type
),
4745 TYPE_VARARGS (this_type
));
4747 /* Handle static member functions.
4748 Dwarf2 has no clean way to discern C++ static and non-static
4749 member functions. G++ helps GDB by marking the first
4750 parameter for non-static member functions (which is the
4751 this pointer) as artificial. We obtain this information
4752 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4753 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4754 fnp
->voffset
= VOFFSET_STATIC
;
4757 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4760 /* Get fcontext from DW_AT_containing_type if present. */
4761 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4762 fnp
->fcontext
= die_containing_type (die
, cu
);
4764 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4765 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4767 /* Get accessibility. */
4768 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4771 switch (DW_UNSND (attr
))
4773 case DW_ACCESS_private
:
4774 fnp
->is_private
= 1;
4776 case DW_ACCESS_protected
:
4777 fnp
->is_protected
= 1;
4782 /* Check for artificial methods. */
4783 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4784 if (attr
&& DW_UNSND (attr
) != 0)
4785 fnp
->is_artificial
= 1;
4787 /* Get index in virtual function table if it is a virtual member
4788 function. For GCC, this is an offset in the appropriate
4789 virtual table, as specified by DW_AT_containing_type. For
4790 everyone else, it is an expression to be evaluated relative
4791 to the object address. */
4793 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4794 if (attr
&& fnp
->fcontext
)
4796 /* Support the .debug_loc offsets */
4797 if (attr_form_is_block (attr
))
4799 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4801 else if (attr_form_is_section_offset (attr
))
4803 dwarf2_complex_location_expr_complaint ();
4807 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4813 /* We only support trivial expressions here. This hack will work
4814 for v3 classes, which always start with the vtable pointer. */
4815 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4816 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4818 struct dwarf_block blk
;
4819 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4820 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4821 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4822 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4823 dwarf2_complex_location_expr_complaint ();
4825 fnp
->voffset
/= cu
->header
.addr_size
;
4827 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4830 dwarf2_complex_location_expr_complaint ();
4834 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4835 if (attr
&& DW_UNSND (attr
))
4837 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4838 complaint (&symfile_complaints
,
4839 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4840 fieldname
, die
->offset
);
4841 TYPE_CPLUS_DYNAMIC (type
) = 1;
4846 /* Create the vector of member function fields, and attach it to the type. */
4849 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4850 struct dwarf2_cu
*cu
)
4852 struct fnfieldlist
*flp
;
4853 int total_length
= 0;
4856 if (cu
->language
== language_ada
)
4857 error ("unexpected member functions in Ada type");
4859 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4860 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4861 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4863 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4865 struct nextfnfield
*nfp
= flp
->head
;
4866 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4869 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4870 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4871 fn_flp
->fn_fields
= (struct fn_field
*)
4872 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4873 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4874 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4876 total_length
+= flp
->length
;
4879 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4880 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4883 /* Returns non-zero if NAME is the name of a vtable member in CU's
4884 language, zero otherwise. */
4886 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4888 static const char vptr
[] = "_vptr";
4889 static const char vtable
[] = "vtable";
4891 /* Look for the C++ and Java forms of the vtable. */
4892 if ((cu
->language
== language_java
4893 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4894 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4895 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4901 /* GCC outputs unnamed structures that are really pointers to member
4902 functions, with the ABI-specified layout. If TYPE describes
4903 such a structure, smash it into a member function type.
4905 GCC shouldn't do this; it should just output pointer to member DIEs.
4906 This is GCC PR debug/28767. */
4909 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
4911 struct type
*pfn_type
, *domain_type
, *new_type
;
4913 /* Check for a structure with no name and two children. */
4914 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
4917 /* Check for __pfn and __delta members. */
4918 if (TYPE_FIELD_NAME (type
, 0) == NULL
4919 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
4920 || TYPE_FIELD_NAME (type
, 1) == NULL
4921 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
4924 /* Find the type of the method. */
4925 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
4926 if (pfn_type
== NULL
4927 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4928 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4931 /* Look for the "this" argument. */
4932 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4933 if (TYPE_NFIELDS (pfn_type
) == 0
4934 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
4935 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4938 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4939 new_type
= alloc_type (objfile
);
4940 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4941 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4942 TYPE_VARARGS (pfn_type
));
4943 smash_to_methodptr_type (type
, new_type
);
4946 /* Called when we find the DIE that starts a structure or union scope
4947 (definition) to process all dies that define the members of the
4950 NOTE: we need to call struct_type regardless of whether or not the
4951 DIE has an at_name attribute, since it might be an anonymous
4952 structure or union. This gets the type entered into our set of
4955 However, if the structure is incomplete (an opaque struct/union)
4956 then suppress creating a symbol table entry for it since gdb only
4957 wants to find the one with the complete definition. Note that if
4958 it is complete, we just call new_symbol, which does it's own
4959 checking about whether the struct/union is anonymous or not (and
4960 suppresses creating a symbol table entry itself). */
4962 static struct type
*
4963 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4965 struct objfile
*objfile
= cu
->objfile
;
4967 struct attribute
*attr
;
4969 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4971 /* If the definition of this type lives in .debug_types, read that type.
4972 Don't follow DW_AT_specification though, that will take us back up
4973 the chain and we want to go down. */
4974 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4977 struct dwarf2_cu
*type_cu
= cu
;
4978 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4979 /* We could just recurse on read_structure_type, but we need to call
4980 get_die_type to ensure only one type for this DIE is created.
4981 This is important, for example, because for c++ classes we need
4982 TYPE_NAME set which is only done by new_symbol. Blech. */
4983 type
= read_type_die (type_die
, type_cu
);
4984 return set_die_type (die
, type
, cu
);
4987 type
= alloc_type (objfile
);
4988 INIT_CPLUS_SPECIFIC (type
);
4990 name
= dwarf2_name (die
, cu
);
4993 if (cu
->language
== language_cplus
4994 || cu
->language
== language_java
)
4996 const char *new_prefix
= determine_class_name (die
, cu
);
4997 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
5001 /* The name is already allocated along with this objfile, so
5002 we don't need to duplicate it for the type. */
5003 TYPE_TAG_NAME (type
) = name
;
5007 if (die
->tag
== DW_TAG_structure_type
)
5009 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5011 else if (die
->tag
== DW_TAG_union_type
)
5013 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5017 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5020 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5021 TYPE_DECLARED_CLASS (type
) = 1;
5023 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5026 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5030 TYPE_LENGTH (type
) = 0;
5033 TYPE_STUB_SUPPORTED (type
) = 1;
5034 if (die_is_declaration (die
, cu
))
5035 TYPE_STUB (type
) = 1;
5037 set_descriptive_type (type
, die
, cu
);
5039 /* We need to add the type field to the die immediately so we don't
5040 infinitely recurse when dealing with pointers to the structure
5041 type within the structure itself. */
5042 set_die_type (die
, type
, cu
);
5044 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5046 struct field_info fi
;
5047 struct die_info
*child_die
;
5049 memset (&fi
, 0, sizeof (struct field_info
));
5051 child_die
= die
->child
;
5053 while (child_die
&& child_die
->tag
)
5055 if (child_die
->tag
== DW_TAG_member
5056 || child_die
->tag
== DW_TAG_variable
)
5058 /* NOTE: carlton/2002-11-05: A C++ static data member
5059 should be a DW_TAG_member that is a declaration, but
5060 all versions of G++ as of this writing (so through at
5061 least 3.2.1) incorrectly generate DW_TAG_variable
5062 tags for them instead. */
5063 dwarf2_add_field (&fi
, child_die
, cu
);
5065 else if (child_die
->tag
== DW_TAG_subprogram
)
5067 /* C++ member function. */
5068 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5070 else if (child_die
->tag
== DW_TAG_inheritance
)
5072 /* C++ base class field. */
5073 dwarf2_add_field (&fi
, child_die
, cu
);
5075 child_die
= sibling_die (child_die
);
5078 /* Attach fields and member functions to the type. */
5080 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5083 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5085 /* Get the type which refers to the base class (possibly this
5086 class itself) which contains the vtable pointer for the current
5087 class from the DW_AT_containing_type attribute. This use of
5088 DW_AT_containing_type is a GNU extension. */
5090 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5092 struct type
*t
= die_containing_type (die
, cu
);
5094 TYPE_VPTR_BASETYPE (type
) = t
;
5099 /* Our own class provides vtbl ptr. */
5100 for (i
= TYPE_NFIELDS (t
) - 1;
5101 i
>= TYPE_N_BASECLASSES (t
);
5104 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5106 if (is_vtable_name (fieldname
, cu
))
5108 TYPE_VPTR_FIELDNO (type
) = i
;
5113 /* Complain if virtual function table field not found. */
5114 if (i
< TYPE_N_BASECLASSES (t
))
5115 complaint (&symfile_complaints
,
5116 _("virtual function table pointer not found when defining class '%s'"),
5117 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5122 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5125 else if (cu
->producer
5126 && strncmp (cu
->producer
,
5127 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5129 /* The IBM XLC compiler does not provide direct indication
5130 of the containing type, but the vtable pointer is
5131 always named __vfp. */
5135 for (i
= TYPE_NFIELDS (type
) - 1;
5136 i
>= TYPE_N_BASECLASSES (type
);
5139 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5141 TYPE_VPTR_FIELDNO (type
) = i
;
5142 TYPE_VPTR_BASETYPE (type
) = type
;
5150 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5152 do_cleanups (back_to
);
5157 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5159 struct objfile
*objfile
= cu
->objfile
;
5160 struct die_info
*child_die
= die
->child
;
5161 struct type
*this_type
;
5163 this_type
= get_die_type (die
, cu
);
5164 if (this_type
== NULL
)
5165 this_type
= read_structure_type (die
, cu
);
5167 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5168 snapshots) has been known to create a die giving a declaration
5169 for a class that has, as a child, a die giving a definition for a
5170 nested class. So we have to process our children even if the
5171 current die is a declaration. Normally, of course, a declaration
5172 won't have any children at all. */
5174 while (child_die
!= NULL
&& child_die
->tag
)
5176 if (child_die
->tag
== DW_TAG_member
5177 || child_die
->tag
== DW_TAG_variable
5178 || child_die
->tag
== DW_TAG_inheritance
)
5183 process_die (child_die
, cu
);
5185 child_die
= sibling_die (child_die
);
5188 /* Do not consider external references. According to the DWARF standard,
5189 these DIEs are identified by the fact that they have no byte_size
5190 attribute, and a declaration attribute. */
5191 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5192 || !die_is_declaration (die
, cu
))
5193 new_symbol (die
, this_type
, cu
);
5196 /* Given a DW_AT_enumeration_type die, set its type. We do not
5197 complete the type's fields yet, or create any symbols. */
5199 static struct type
*
5200 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5202 struct objfile
*objfile
= cu
->objfile
;
5204 struct attribute
*attr
;
5207 /* If the definition of this type lives in .debug_types, read that type.
5208 Don't follow DW_AT_specification though, that will take us back up
5209 the chain and we want to go down. */
5210 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5213 struct dwarf2_cu
*type_cu
= cu
;
5214 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5215 type
= read_type_die (type_die
, type_cu
);
5216 return set_die_type (die
, type
, cu
);
5219 type
= alloc_type (objfile
);
5221 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5222 name
= dwarf2_full_name (die
, cu
);
5224 TYPE_TAG_NAME (type
) = (char *) name
;
5226 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5229 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5233 TYPE_LENGTH (type
) = 0;
5236 /* The enumeration DIE can be incomplete. In Ada, any type can be
5237 declared as private in the package spec, and then defined only
5238 inside the package body. Such types are known as Taft Amendment
5239 Types. When another package uses such a type, an incomplete DIE
5240 may be generated by the compiler. */
5241 if (die_is_declaration (die
, cu
))
5242 TYPE_STUB (type
) = 1;
5244 return set_die_type (die
, type
, cu
);
5247 /* Determine the name of the type represented by DIE, which should be
5248 a named C++ or Java compound type. Return the name in question,
5249 allocated on the objfile obstack. */
5252 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5254 const char *new_prefix
= NULL
;
5256 /* If we don't have namespace debug info, guess the name by trying
5257 to demangle the names of members, just like we did in
5258 guess_structure_name. */
5259 if (!processing_has_namespace_info
)
5261 struct die_info
*child
;
5263 for (child
= die
->child
;
5264 child
!= NULL
&& child
->tag
!= 0;
5265 child
= sibling_die (child
))
5267 if (child
->tag
== DW_TAG_subprogram
)
5270 = language_class_name_from_physname (cu
->language_defn
,
5274 if (phys_prefix
!= NULL
)
5277 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5278 &cu
->objfile
->objfile_obstack
);
5279 xfree (phys_prefix
);
5286 if (new_prefix
== NULL
)
5287 new_prefix
= dwarf2_full_name (die
, cu
);
5292 /* Given a pointer to a die which begins an enumeration, process all
5293 the dies that define the members of the enumeration, and create the
5294 symbol for the enumeration type.
5296 NOTE: We reverse the order of the element list. */
5299 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5301 struct objfile
*objfile
= cu
->objfile
;
5302 struct die_info
*child_die
;
5303 struct field
*fields
;
5306 int unsigned_enum
= 1;
5308 struct type
*this_type
;
5312 this_type
= get_die_type (die
, cu
);
5313 if (this_type
== NULL
)
5314 this_type
= read_enumeration_type (die
, cu
);
5315 if (die
->child
!= NULL
)
5317 child_die
= die
->child
;
5318 while (child_die
&& child_die
->tag
)
5320 if (child_die
->tag
!= DW_TAG_enumerator
)
5322 process_die (child_die
, cu
);
5326 name
= dwarf2_name (child_die
, cu
);
5329 sym
= new_symbol (child_die
, this_type
, cu
);
5330 if (SYMBOL_VALUE (sym
) < 0)
5333 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5335 fields
= (struct field
*)
5337 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5338 * sizeof (struct field
));
5341 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5342 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5343 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5344 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5350 child_die
= sibling_die (child_die
);
5355 TYPE_NFIELDS (this_type
) = num_fields
;
5356 TYPE_FIELDS (this_type
) = (struct field
*)
5357 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5358 memcpy (TYPE_FIELDS (this_type
), fields
,
5359 sizeof (struct field
) * num_fields
);
5363 TYPE_UNSIGNED (this_type
) = 1;
5366 new_symbol (die
, this_type
, cu
);
5369 /* Extract all information from a DW_TAG_array_type DIE and put it in
5370 the DIE's type field. For now, this only handles one dimensional
5373 static struct type
*
5374 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5376 struct objfile
*objfile
= cu
->objfile
;
5377 struct die_info
*child_die
;
5378 struct type
*type
= NULL
;
5379 struct type
*element_type
, *range_type
, *index_type
;
5380 struct type
**range_types
= NULL
;
5381 struct attribute
*attr
;
5383 struct cleanup
*back_to
;
5386 element_type
= die_type (die
, cu
);
5388 /* Irix 6.2 native cc creates array types without children for
5389 arrays with unspecified length. */
5390 if (die
->child
== NULL
)
5392 index_type
= objfile_type (objfile
)->builtin_int
;
5393 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5394 type
= create_array_type (NULL
, element_type
, range_type
);
5395 return set_die_type (die
, type
, cu
);
5398 back_to
= make_cleanup (null_cleanup
, NULL
);
5399 child_die
= die
->child
;
5400 while (child_die
&& child_die
->tag
)
5402 if (child_die
->tag
== DW_TAG_subrange_type
)
5404 struct type
*child_type
= read_type_die (child_die
, cu
);
5405 if (child_type
!= NULL
)
5407 /* The range type was succesfully read. Save it for
5408 the array type creation. */
5409 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5411 range_types
= (struct type
**)
5412 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5413 * sizeof (struct type
*));
5415 make_cleanup (free_current_contents
, &range_types
);
5417 range_types
[ndim
++] = child_type
;
5420 child_die
= sibling_die (child_die
);
5423 /* Dwarf2 dimensions are output from left to right, create the
5424 necessary array types in backwards order. */
5426 type
= element_type
;
5428 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5432 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5437 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5440 /* Understand Dwarf2 support for vector types (like they occur on
5441 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5442 array type. This is not part of the Dwarf2/3 standard yet, but a
5443 custom vendor extension. The main difference between a regular
5444 array and the vector variant is that vectors are passed by value
5446 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5448 make_vector_type (type
);
5450 name
= dwarf2_name (die
, cu
);
5452 TYPE_NAME (type
) = name
;
5454 set_descriptive_type (type
, die
, cu
);
5456 do_cleanups (back_to
);
5458 /* Install the type in the die. */
5459 return set_die_type (die
, type
, cu
);
5462 static enum dwarf_array_dim_ordering
5463 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5465 struct attribute
*attr
;
5467 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5469 if (attr
) return DW_SND (attr
);
5472 GNU F77 is a special case, as at 08/2004 array type info is the
5473 opposite order to the dwarf2 specification, but data is still
5474 laid out as per normal fortran.
5476 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5480 if (cu
->language
== language_fortran
5481 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5483 return DW_ORD_row_major
;
5486 switch (cu
->language_defn
->la_array_ordering
)
5488 case array_column_major
:
5489 return DW_ORD_col_major
;
5490 case array_row_major
:
5492 return DW_ORD_row_major
;
5496 /* Extract all information from a DW_TAG_set_type DIE and put it in
5497 the DIE's type field. */
5499 static struct type
*
5500 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5502 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5504 return set_die_type (die
, set_type
, cu
);
5507 /* First cut: install each common block member as a global variable. */
5510 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5512 struct die_info
*child_die
;
5513 struct attribute
*attr
;
5515 CORE_ADDR base
= (CORE_ADDR
) 0;
5517 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5520 /* Support the .debug_loc offsets */
5521 if (attr_form_is_block (attr
))
5523 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5525 else if (attr_form_is_section_offset (attr
))
5527 dwarf2_complex_location_expr_complaint ();
5531 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5532 "common block member");
5535 if (die
->child
!= NULL
)
5537 child_die
= die
->child
;
5538 while (child_die
&& child_die
->tag
)
5540 sym
= new_symbol (child_die
, NULL
, cu
);
5541 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5544 CORE_ADDR byte_offset
= 0;
5546 if (attr_form_is_section_offset (attr
))
5547 dwarf2_complex_location_expr_complaint ();
5548 else if (attr_form_is_constant (attr
))
5549 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5550 else if (attr_form_is_block (attr
))
5551 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5553 dwarf2_complex_location_expr_complaint ();
5555 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5556 add_symbol_to_list (sym
, &global_symbols
);
5558 child_die
= sibling_die (child_die
);
5563 /* Create a type for a C++ namespace. */
5565 static struct type
*
5566 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5568 struct objfile
*objfile
= cu
->objfile
;
5569 const char *previous_prefix
, *name
;
5573 /* For extensions, reuse the type of the original namespace. */
5574 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5576 struct die_info
*ext_die
;
5577 struct dwarf2_cu
*ext_cu
= cu
;
5578 ext_die
= dwarf2_extension (die
, &ext_cu
);
5579 type
= read_type_die (ext_die
, ext_cu
);
5580 return set_die_type (die
, type
, cu
);
5583 name
= namespace_name (die
, &is_anonymous
, cu
);
5585 /* Now build the name of the current namespace. */
5587 previous_prefix
= determine_prefix (die
, cu
);
5588 if (previous_prefix
[0] != '\0')
5589 name
= typename_concat (&objfile
->objfile_obstack
,
5590 previous_prefix
, name
, cu
);
5592 /* Create the type. */
5593 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5595 TYPE_NAME (type
) = (char *) name
;
5596 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5598 set_die_type (die
, type
, cu
);
5603 /* Read a C++ namespace. */
5606 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5608 struct objfile
*objfile
= cu
->objfile
;
5612 /* Add a symbol associated to this if we haven't seen the namespace
5613 before. Also, add a using directive if it's an anonymous
5616 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5620 type
= read_type_die (die
, cu
);
5621 new_symbol (die
, type
, cu
);
5623 name
= namespace_name (die
, &is_anonymous
, cu
);
5626 const char *previous_prefix
= determine_prefix (die
, cu
);
5627 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
);
5631 if (die
->child
!= NULL
)
5633 struct die_info
*child_die
= die
->child
;
5635 while (child_die
&& child_die
->tag
)
5637 process_die (child_die
, cu
);
5638 child_die
= sibling_die (child_die
);
5643 /* Read a Fortran module. */
5646 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5648 struct die_info
*child_die
= die
->child
;
5650 /* FIXME: Support the separate Fortran module namespaces. */
5652 while (child_die
&& child_die
->tag
)
5654 process_die (child_die
, cu
);
5655 child_die
= sibling_die (child_die
);
5659 /* Return the name of the namespace represented by DIE. Set
5660 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5664 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5666 struct die_info
*current_die
;
5667 const char *name
= NULL
;
5669 /* Loop through the extensions until we find a name. */
5671 for (current_die
= die
;
5672 current_die
!= NULL
;
5673 current_die
= dwarf2_extension (die
, &cu
))
5675 name
= dwarf2_name (current_die
, cu
);
5680 /* Is it an anonymous namespace? */
5682 *is_anonymous
= (name
== NULL
);
5684 name
= "(anonymous namespace)";
5689 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5690 the user defined type vector. */
5692 static struct type
*
5693 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5695 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5696 struct comp_unit_head
*cu_header
= &cu
->header
;
5698 struct attribute
*attr_byte_size
;
5699 struct attribute
*attr_address_class
;
5700 int byte_size
, addr_class
;
5702 type
= lookup_pointer_type (die_type (die
, cu
));
5704 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5706 byte_size
= DW_UNSND (attr_byte_size
);
5708 byte_size
= cu_header
->addr_size
;
5710 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5711 if (attr_address_class
)
5712 addr_class
= DW_UNSND (attr_address_class
);
5714 addr_class
= DW_ADDR_none
;
5716 /* If the pointer size or address class is different than the
5717 default, create a type variant marked as such and set the
5718 length accordingly. */
5719 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5721 if (gdbarch_address_class_type_flags_p (gdbarch
))
5725 type_flags
= gdbarch_address_class_type_flags
5726 (gdbarch
, byte_size
, addr_class
);
5727 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5729 type
= make_type_with_address_space (type
, type_flags
);
5731 else if (TYPE_LENGTH (type
) != byte_size
)
5733 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5736 /* Should we also complain about unhandled address classes? */
5740 TYPE_LENGTH (type
) = byte_size
;
5741 return set_die_type (die
, type
, cu
);
5744 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5745 the user defined type vector. */
5747 static struct type
*
5748 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5750 struct objfile
*objfile
= cu
->objfile
;
5752 struct type
*to_type
;
5753 struct type
*domain
;
5755 to_type
= die_type (die
, cu
);
5756 domain
= die_containing_type (die
, cu
);
5758 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5759 type
= lookup_methodptr_type (to_type
);
5761 type
= lookup_memberptr_type (to_type
, domain
);
5763 return set_die_type (die
, type
, cu
);
5766 /* Extract all information from a DW_TAG_reference_type DIE and add to
5767 the user defined type vector. */
5769 static struct type
*
5770 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5772 struct comp_unit_head
*cu_header
= &cu
->header
;
5774 struct attribute
*attr
;
5776 type
= lookup_reference_type (die_type (die
, cu
));
5777 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5780 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5784 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5786 return set_die_type (die
, type
, cu
);
5789 static struct type
*
5790 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5792 struct type
*base_type
, *cv_type
;
5794 base_type
= die_type (die
, cu
);
5795 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5796 return set_die_type (die
, cv_type
, cu
);
5799 static struct type
*
5800 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5802 struct type
*base_type
, *cv_type
;
5804 base_type
= die_type (die
, cu
);
5805 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5806 return set_die_type (die
, cv_type
, cu
);
5809 /* Extract all information from a DW_TAG_string_type DIE and add to
5810 the user defined type vector. It isn't really a user defined type,
5811 but it behaves like one, with other DIE's using an AT_user_def_type
5812 attribute to reference it. */
5814 static struct type
*
5815 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5817 struct objfile
*objfile
= cu
->objfile
;
5818 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5819 struct type
*type
, *range_type
, *index_type
, *char_type
;
5820 struct attribute
*attr
;
5821 unsigned int length
;
5823 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5826 length
= DW_UNSND (attr
);
5830 /* check for the DW_AT_byte_size attribute */
5831 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5834 length
= DW_UNSND (attr
);
5842 index_type
= objfile_type (objfile
)->builtin_int
;
5843 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5844 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5845 type
= create_string_type (NULL
, char_type
, range_type
);
5847 return set_die_type (die
, type
, cu
);
5850 /* Handle DIES due to C code like:
5854 int (*funcp)(int a, long l);
5858 ('funcp' generates a DW_TAG_subroutine_type DIE)
5861 static struct type
*
5862 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5864 struct type
*type
; /* Type that this function returns */
5865 struct type
*ftype
; /* Function that returns above type */
5866 struct attribute
*attr
;
5868 type
= die_type (die
, cu
);
5869 ftype
= lookup_function_type (type
);
5871 /* All functions in C++, Pascal and Java have prototypes. */
5872 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5873 if ((attr
&& (DW_UNSND (attr
) != 0))
5874 || cu
->language
== language_cplus
5875 || cu
->language
== language_java
5876 || cu
->language
== language_pascal
)
5877 TYPE_PROTOTYPED (ftype
) = 1;
5879 /* Store the calling convention in the type if it's available in
5880 the subroutine die. Otherwise set the calling convention to
5881 the default value DW_CC_normal. */
5882 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5883 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5885 /* We need to add the subroutine type to the die immediately so
5886 we don't infinitely recurse when dealing with parameters
5887 declared as the same subroutine type. */
5888 set_die_type (die
, ftype
, cu
);
5890 if (die
->child
!= NULL
)
5892 struct die_info
*child_die
;
5896 /* Count the number of parameters.
5897 FIXME: GDB currently ignores vararg functions, but knows about
5898 vararg member functions. */
5899 child_die
= die
->child
;
5900 while (child_die
&& child_die
->tag
)
5902 if (child_die
->tag
== DW_TAG_formal_parameter
)
5904 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5905 TYPE_VARARGS (ftype
) = 1;
5906 child_die
= sibling_die (child_die
);
5909 /* Allocate storage for parameters and fill them in. */
5910 TYPE_NFIELDS (ftype
) = nparams
;
5911 TYPE_FIELDS (ftype
) = (struct field
*)
5912 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5914 child_die
= die
->child
;
5915 while (child_die
&& child_die
->tag
)
5917 if (child_die
->tag
== DW_TAG_formal_parameter
)
5919 /* Dwarf2 has no clean way to discern C++ static and non-static
5920 member functions. G++ helps GDB by marking the first
5921 parameter for non-static member functions (which is the
5922 this pointer) as artificial. We pass this information
5923 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5924 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5926 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5928 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5929 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5932 child_die
= sibling_die (child_die
);
5939 static struct type
*
5940 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5942 struct objfile
*objfile
= cu
->objfile
;
5943 struct attribute
*attr
;
5944 const char *name
= NULL
;
5945 struct type
*this_type
;
5947 name
= dwarf2_full_name (die
, cu
);
5948 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5949 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5950 TYPE_NAME (this_type
) = (char *) name
;
5951 set_die_type (die
, this_type
, cu
);
5952 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5956 /* Find a representation of a given base type and install
5957 it in the TYPE field of the die. */
5959 static struct type
*
5960 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5962 struct objfile
*objfile
= cu
->objfile
;
5964 struct attribute
*attr
;
5965 int encoding
= 0, size
= 0;
5967 enum type_code code
= TYPE_CODE_INT
;
5969 struct type
*target_type
= NULL
;
5971 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5974 encoding
= DW_UNSND (attr
);
5976 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5979 size
= DW_UNSND (attr
);
5981 name
= dwarf2_name (die
, cu
);
5984 complaint (&symfile_complaints
,
5985 _("DW_AT_name missing from DW_TAG_base_type"));
5990 case DW_ATE_address
:
5991 /* Turn DW_ATE_address into a void * pointer. */
5992 code
= TYPE_CODE_PTR
;
5993 type_flags
|= TYPE_FLAG_UNSIGNED
;
5994 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5996 case DW_ATE_boolean
:
5997 code
= TYPE_CODE_BOOL
;
5998 type_flags
|= TYPE_FLAG_UNSIGNED
;
6000 case DW_ATE_complex_float
:
6001 code
= TYPE_CODE_COMPLEX
;
6002 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6004 case DW_ATE_decimal_float
:
6005 code
= TYPE_CODE_DECFLOAT
;
6008 code
= TYPE_CODE_FLT
;
6012 case DW_ATE_unsigned
:
6013 type_flags
|= TYPE_FLAG_UNSIGNED
;
6015 case DW_ATE_signed_char
:
6016 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6017 || cu
->language
== language_pascal
)
6018 code
= TYPE_CODE_CHAR
;
6020 case DW_ATE_unsigned_char
:
6021 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6022 || cu
->language
== language_pascal
)
6023 code
= TYPE_CODE_CHAR
;
6024 type_flags
|= TYPE_FLAG_UNSIGNED
;
6027 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6028 dwarf_type_encoding_name (encoding
));
6032 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6033 TYPE_NAME (type
) = name
;
6034 TYPE_TARGET_TYPE (type
) = target_type
;
6036 if (name
&& strcmp (name
, "char") == 0)
6037 TYPE_NOSIGN (type
) = 1;
6039 return set_die_type (die
, type
, cu
);
6042 /* Read the given DW_AT_subrange DIE. */
6044 static struct type
*
6045 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6047 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6048 struct type
*base_type
;
6049 struct type
*range_type
;
6050 struct attribute
*attr
;
6054 LONGEST negative_mask
;
6056 base_type
= die_type (die
, cu
);
6057 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6059 complaint (&symfile_complaints
,
6060 _("DW_AT_type missing from DW_TAG_subrange_type"));
6062 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6063 0, NULL
, cu
->objfile
);
6066 if (cu
->language
== language_fortran
)
6068 /* FORTRAN implies a lower bound of 1, if not given. */
6072 /* FIXME: For variable sized arrays either of these could be
6073 a variable rather than a constant value. We'll allow it,
6074 but we don't know how to handle it. */
6075 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6077 low
= dwarf2_get_attr_constant_value (attr
, 0);
6079 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6082 if (attr
->form
== DW_FORM_block1
)
6084 /* GCC encodes arrays with unspecified or dynamic length
6085 with a DW_FORM_block1 attribute.
6086 FIXME: GDB does not yet know how to handle dynamic
6087 arrays properly, treat them as arrays with unspecified
6090 FIXME: jimb/2003-09-22: GDB does not really know
6091 how to handle arrays of unspecified length
6092 either; we just represent them as zero-length
6093 arrays. Choose an appropriate upper bound given
6094 the lower bound we've computed above. */
6098 high
= dwarf2_get_attr_constant_value (attr
, 1);
6102 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6103 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6104 low
|= negative_mask
;
6105 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6106 high
|= negative_mask
;
6108 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6110 name
= dwarf2_name (die
, cu
);
6112 TYPE_NAME (range_type
) = name
;
6114 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6116 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6118 set_descriptive_type (range_type
, die
, cu
);
6120 return set_die_type (die
, range_type
, cu
);
6123 static struct type
*
6124 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6128 /* For now, we only support the C meaning of an unspecified type: void. */
6130 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6131 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6133 return set_die_type (die
, type
, cu
);
6136 /* Trivial hash function for die_info: the hash value of a DIE
6137 is its offset in .debug_info for this objfile. */
6140 die_hash (const void *item
)
6142 const struct die_info
*die
= item
;
6146 /* Trivial comparison function for die_info structures: two DIEs
6147 are equal if they have the same offset. */
6150 die_eq (const void *item_lhs
, const void *item_rhs
)
6152 const struct die_info
*die_lhs
= item_lhs
;
6153 const struct die_info
*die_rhs
= item_rhs
;
6154 return die_lhs
->offset
== die_rhs
->offset
;
6157 /* Read a whole compilation unit into a linked list of dies. */
6159 static struct die_info
*
6160 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6162 struct die_reader_specs reader_specs
;
6164 gdb_assert (cu
->die_hash
== NULL
);
6166 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6170 &cu
->comp_unit_obstack
,
6171 hashtab_obstack_allocate
,
6172 dummy_obstack_deallocate
);
6174 init_cu_die_reader (&reader_specs
, cu
);
6176 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6179 /* Main entry point for reading a DIE and all children.
6180 Read the DIE and dump it if requested. */
6182 static struct die_info
*
6183 read_die_and_children (const struct die_reader_specs
*reader
,
6185 gdb_byte
**new_info_ptr
,
6186 struct die_info
*parent
)
6188 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6189 new_info_ptr
, parent
);
6191 if (dwarf2_die_debug
)
6193 fprintf_unfiltered (gdb_stdlog
,
6194 "\nRead die from %s of %s:\n",
6195 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6197 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6199 : "unknown section",
6200 reader
->abfd
->filename
);
6201 dump_die (result
, dwarf2_die_debug
);
6207 /* Read a single die and all its descendents. Set the die's sibling
6208 field to NULL; set other fields in the die correctly, and set all
6209 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6210 location of the info_ptr after reading all of those dies. PARENT
6211 is the parent of the die in question. */
6213 static struct die_info
*
6214 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6216 gdb_byte
**new_info_ptr
,
6217 struct die_info
*parent
)
6219 struct die_info
*die
;
6223 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6226 *new_info_ptr
= cur_ptr
;
6229 store_in_ref_table (die
, reader
->cu
);
6232 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6236 *new_info_ptr
= cur_ptr
;
6239 die
->sibling
= NULL
;
6240 die
->parent
= parent
;
6244 /* Read a die, all of its descendents, and all of its siblings; set
6245 all of the fields of all of the dies correctly. Arguments are as
6246 in read_die_and_children. */
6248 static struct die_info
*
6249 read_die_and_siblings (const struct die_reader_specs
*reader
,
6251 gdb_byte
**new_info_ptr
,
6252 struct die_info
*parent
)
6254 struct die_info
*first_die
, *last_sibling
;
6258 first_die
= last_sibling
= NULL
;
6262 struct die_info
*die
6263 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6267 *new_info_ptr
= cur_ptr
;
6274 last_sibling
->sibling
= die
;
6280 /* Read the die from the .debug_info section buffer. Set DIEP to
6281 point to a newly allocated die with its information, except for its
6282 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6283 whether the die has children or not. */
6286 read_full_die (const struct die_reader_specs
*reader
,
6287 struct die_info
**diep
, gdb_byte
*info_ptr
,
6290 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6291 struct abbrev_info
*abbrev
;
6292 struct die_info
*die
;
6293 struct dwarf2_cu
*cu
= reader
->cu
;
6294 bfd
*abfd
= reader
->abfd
;
6296 offset
= info_ptr
- reader
->buffer
;
6297 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6298 info_ptr
+= bytes_read
;
6306 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6308 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6310 bfd_get_filename (abfd
));
6312 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6313 die
->offset
= offset
;
6314 die
->tag
= abbrev
->tag
;
6315 die
->abbrev
= abbrev_number
;
6317 die
->num_attrs
= abbrev
->num_attrs
;
6319 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6320 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6321 abfd
, info_ptr
, cu
);
6324 *has_children
= abbrev
->has_children
;
6328 /* In DWARF version 2, the description of the debugging information is
6329 stored in a separate .debug_abbrev section. Before we read any
6330 dies from a section we read in all abbreviations and install them
6331 in a hash table. This function also sets flags in CU describing
6332 the data found in the abbrev table. */
6335 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6337 struct comp_unit_head
*cu_header
= &cu
->header
;
6338 gdb_byte
*abbrev_ptr
;
6339 struct abbrev_info
*cur_abbrev
;
6340 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6341 unsigned int abbrev_form
, hash_number
;
6342 struct attr_abbrev
*cur_attrs
;
6343 unsigned int allocated_attrs
;
6345 /* Initialize dwarf2 abbrevs */
6346 obstack_init (&cu
->abbrev_obstack
);
6347 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6349 * sizeof (struct abbrev_info
*)));
6350 memset (cu
->dwarf2_abbrevs
, 0,
6351 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6353 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6354 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6355 abbrev_ptr
+= bytes_read
;
6357 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6358 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6360 /* loop until we reach an abbrev number of 0 */
6361 while (abbrev_number
)
6363 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6365 /* read in abbrev header */
6366 cur_abbrev
->number
= abbrev_number
;
6367 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6368 abbrev_ptr
+= bytes_read
;
6369 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6372 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6373 cu
->has_namespace_info
= 1;
6375 /* now read in declarations */
6376 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6377 abbrev_ptr
+= bytes_read
;
6378 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6379 abbrev_ptr
+= bytes_read
;
6382 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6384 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6386 = xrealloc (cur_attrs
, (allocated_attrs
6387 * sizeof (struct attr_abbrev
)));
6390 /* Record whether this compilation unit might have
6391 inter-compilation-unit references. If we don't know what form
6392 this attribute will have, then it might potentially be a
6393 DW_FORM_ref_addr, so we conservatively expect inter-CU
6396 if (abbrev_form
== DW_FORM_ref_addr
6397 || abbrev_form
== DW_FORM_indirect
)
6398 cu
->has_form_ref_addr
= 1;
6400 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6401 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6402 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6403 abbrev_ptr
+= bytes_read
;
6404 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6405 abbrev_ptr
+= bytes_read
;
6408 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6409 (cur_abbrev
->num_attrs
6410 * sizeof (struct attr_abbrev
)));
6411 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6412 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6414 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6415 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6416 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6418 /* Get next abbreviation.
6419 Under Irix6 the abbreviations for a compilation unit are not
6420 always properly terminated with an abbrev number of 0.
6421 Exit loop if we encounter an abbreviation which we have
6422 already read (which means we are about to read the abbreviations
6423 for the next compile unit) or if the end of the abbreviation
6424 table is reached. */
6425 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6426 >= dwarf2_per_objfile
->abbrev
.size
)
6428 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6429 abbrev_ptr
+= bytes_read
;
6430 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6437 /* Release the memory used by the abbrev table for a compilation unit. */
6440 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6442 struct dwarf2_cu
*cu
= ptr_to_cu
;
6444 obstack_free (&cu
->abbrev_obstack
, NULL
);
6445 cu
->dwarf2_abbrevs
= NULL
;
6448 /* Lookup an abbrev_info structure in the abbrev hash table. */
6450 static struct abbrev_info
*
6451 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6453 unsigned int hash_number
;
6454 struct abbrev_info
*abbrev
;
6456 hash_number
= number
% ABBREV_HASH_SIZE
;
6457 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6461 if (abbrev
->number
== number
)
6464 abbrev
= abbrev
->next
;
6469 /* Returns nonzero if TAG represents a type that we might generate a partial
6473 is_type_tag_for_partial (int tag
)
6478 /* Some types that would be reasonable to generate partial symbols for,
6479 that we don't at present. */
6480 case DW_TAG_array_type
:
6481 case DW_TAG_file_type
:
6482 case DW_TAG_ptr_to_member_type
:
6483 case DW_TAG_set_type
:
6484 case DW_TAG_string_type
:
6485 case DW_TAG_subroutine_type
:
6487 case DW_TAG_base_type
:
6488 case DW_TAG_class_type
:
6489 case DW_TAG_interface_type
:
6490 case DW_TAG_enumeration_type
:
6491 case DW_TAG_structure_type
:
6492 case DW_TAG_subrange_type
:
6493 case DW_TAG_typedef
:
6494 case DW_TAG_union_type
:
6501 /* Load all DIEs that are interesting for partial symbols into memory. */
6503 static struct partial_die_info
*
6504 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6505 int building_psymtab
, struct dwarf2_cu
*cu
)
6507 struct partial_die_info
*part_die
;
6508 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6509 struct abbrev_info
*abbrev
;
6510 unsigned int bytes_read
;
6511 unsigned int load_all
= 0;
6513 int nesting_level
= 1;
6518 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6522 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6526 &cu
->comp_unit_obstack
,
6527 hashtab_obstack_allocate
,
6528 dummy_obstack_deallocate
);
6530 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6531 sizeof (struct partial_die_info
));
6535 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6537 /* A NULL abbrev means the end of a series of children. */
6540 if (--nesting_level
== 0)
6542 /* PART_DIE was probably the last thing allocated on the
6543 comp_unit_obstack, so we could call obstack_free
6544 here. We don't do that because the waste is small,
6545 and will be cleaned up when we're done with this
6546 compilation unit. This way, we're also more robust
6547 against other users of the comp_unit_obstack. */
6550 info_ptr
+= bytes_read
;
6551 last_die
= parent_die
;
6552 parent_die
= parent_die
->die_parent
;
6556 /* Check whether this DIE is interesting enough to save. Normally
6557 we would not be interested in members here, but there may be
6558 later variables referencing them via DW_AT_specification (for
6561 && !is_type_tag_for_partial (abbrev
->tag
)
6562 && abbrev
->tag
!= DW_TAG_enumerator
6563 && abbrev
->tag
!= DW_TAG_subprogram
6564 && abbrev
->tag
!= DW_TAG_lexical_block
6565 && abbrev
->tag
!= DW_TAG_variable
6566 && abbrev
->tag
!= DW_TAG_namespace
6567 && abbrev
->tag
!= DW_TAG_member
)
6569 /* Otherwise we skip to the next sibling, if any. */
6570 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6574 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6575 buffer
, info_ptr
, cu
);
6577 /* This two-pass algorithm for processing partial symbols has a
6578 high cost in cache pressure. Thus, handle some simple cases
6579 here which cover the majority of C partial symbols. DIEs
6580 which neither have specification tags in them, nor could have
6581 specification tags elsewhere pointing at them, can simply be
6582 processed and discarded.
6584 This segment is also optional; scan_partial_symbols and
6585 add_partial_symbol will handle these DIEs if we chain
6586 them in normally. When compilers which do not emit large
6587 quantities of duplicate debug information are more common,
6588 this code can probably be removed. */
6590 /* Any complete simple types at the top level (pretty much all
6591 of them, for a language without namespaces), can be processed
6593 if (parent_die
== NULL
6594 && part_die
->has_specification
== 0
6595 && part_die
->is_declaration
== 0
6596 && (part_die
->tag
== DW_TAG_typedef
6597 || part_die
->tag
== DW_TAG_base_type
6598 || part_die
->tag
== DW_TAG_subrange_type
))
6600 if (building_psymtab
&& part_die
->name
!= NULL
)
6601 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6602 VAR_DOMAIN
, LOC_TYPEDEF
,
6603 &cu
->objfile
->static_psymbols
,
6604 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6605 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6609 /* If we're at the second level, and we're an enumerator, and
6610 our parent has no specification (meaning possibly lives in a
6611 namespace elsewhere), then we can add the partial symbol now
6612 instead of queueing it. */
6613 if (part_die
->tag
== DW_TAG_enumerator
6614 && parent_die
!= NULL
6615 && parent_die
->die_parent
== NULL
6616 && parent_die
->tag
== DW_TAG_enumeration_type
6617 && parent_die
->has_specification
== 0)
6619 if (part_die
->name
== NULL
)
6620 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6621 else if (building_psymtab
)
6622 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6623 VAR_DOMAIN
, LOC_CONST
,
6624 (cu
->language
== language_cplus
6625 || cu
->language
== language_java
)
6626 ? &cu
->objfile
->global_psymbols
6627 : &cu
->objfile
->static_psymbols
,
6628 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6630 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6634 /* We'll save this DIE so link it in. */
6635 part_die
->die_parent
= parent_die
;
6636 part_die
->die_sibling
= NULL
;
6637 part_die
->die_child
= NULL
;
6639 if (last_die
&& last_die
== parent_die
)
6640 last_die
->die_child
= part_die
;
6642 last_die
->die_sibling
= part_die
;
6644 last_die
= part_die
;
6646 if (first_die
== NULL
)
6647 first_die
= part_die
;
6649 /* Maybe add the DIE to the hash table. Not all DIEs that we
6650 find interesting need to be in the hash table, because we
6651 also have the parent/sibling/child chains; only those that we
6652 might refer to by offset later during partial symbol reading.
6654 For now this means things that might have be the target of a
6655 DW_AT_specification, DW_AT_abstract_origin, or
6656 DW_AT_extension. DW_AT_extension will refer only to
6657 namespaces; DW_AT_abstract_origin refers to functions (and
6658 many things under the function DIE, but we do not recurse
6659 into function DIEs during partial symbol reading) and
6660 possibly variables as well; DW_AT_specification refers to
6661 declarations. Declarations ought to have the DW_AT_declaration
6662 flag. It happens that GCC forgets to put it in sometimes, but
6663 only for functions, not for types.
6665 Adding more things than necessary to the hash table is harmless
6666 except for the performance cost. Adding too few will result in
6667 wasted time in find_partial_die, when we reread the compilation
6668 unit with load_all_dies set. */
6671 || abbrev
->tag
== DW_TAG_subprogram
6672 || abbrev
->tag
== DW_TAG_variable
6673 || abbrev
->tag
== DW_TAG_namespace
6674 || part_die
->is_declaration
)
6678 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6679 part_die
->offset
, INSERT
);
6683 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6684 sizeof (struct partial_die_info
));
6686 /* For some DIEs we want to follow their children (if any). For C
6687 we have no reason to follow the children of structures; for other
6688 languages we have to, both so that we can get at method physnames
6689 to infer fully qualified class names, and for DW_AT_specification.
6691 For Ada, we need to scan the children of subprograms and lexical
6692 blocks as well because Ada allows the definition of nested
6693 entities that could be interesting for the debugger, such as
6694 nested subprograms for instance. */
6695 if (last_die
->has_children
6697 || last_die
->tag
== DW_TAG_namespace
6698 || last_die
->tag
== DW_TAG_enumeration_type
6699 || (cu
->language
!= language_c
6700 && (last_die
->tag
== DW_TAG_class_type
6701 || last_die
->tag
== DW_TAG_interface_type
6702 || last_die
->tag
== DW_TAG_structure_type
6703 || last_die
->tag
== DW_TAG_union_type
))
6704 || (cu
->language
== language_ada
6705 && (last_die
->tag
== DW_TAG_subprogram
6706 || last_die
->tag
== DW_TAG_lexical_block
))))
6709 parent_die
= last_die
;
6713 /* Otherwise we skip to the next sibling, if any. */
6714 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6716 /* Back to the top, do it again. */
6720 /* Read a minimal amount of information into the minimal die structure. */
6723 read_partial_die (struct partial_die_info
*part_die
,
6724 struct abbrev_info
*abbrev
,
6725 unsigned int abbrev_len
, bfd
*abfd
,
6726 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6727 struct dwarf2_cu
*cu
)
6729 unsigned int bytes_read
, i
;
6730 struct attribute attr
;
6731 int has_low_pc_attr
= 0;
6732 int has_high_pc_attr
= 0;
6734 memset (part_die
, 0, sizeof (struct partial_die_info
));
6736 part_die
->offset
= info_ptr
- buffer
;
6738 info_ptr
+= abbrev_len
;
6743 part_die
->tag
= abbrev
->tag
;
6744 part_die
->has_children
= abbrev
->has_children
;
6746 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6748 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6750 /* Store the data if it is of an attribute we want to keep in a
6751 partial symbol table. */
6755 switch (part_die
->tag
)
6757 case DW_TAG_compile_unit
:
6758 case DW_TAG_type_unit
:
6759 /* Compilation units have a DW_AT_name that is a filename, not
6760 a source language identifier. */
6761 case DW_TAG_enumeration_type
:
6762 case DW_TAG_enumerator
:
6763 /* These tags always have simple identifiers already; no need
6764 to canonicalize them. */
6765 part_die
->name
= DW_STRING (&attr
);
6769 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6770 &cu
->objfile
->objfile_obstack
);
6774 case DW_AT_MIPS_linkage_name
:
6775 part_die
->name
= DW_STRING (&attr
);
6778 has_low_pc_attr
= 1;
6779 part_die
->lowpc
= DW_ADDR (&attr
);
6782 has_high_pc_attr
= 1;
6783 part_die
->highpc
= DW_ADDR (&attr
);
6785 case DW_AT_location
:
6786 /* Support the .debug_loc offsets */
6787 if (attr_form_is_block (&attr
))
6789 part_die
->locdesc
= DW_BLOCK (&attr
);
6791 else if (attr_form_is_section_offset (&attr
))
6793 dwarf2_complex_location_expr_complaint ();
6797 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6798 "partial symbol information");
6801 case DW_AT_external
:
6802 part_die
->is_external
= DW_UNSND (&attr
);
6804 case DW_AT_declaration
:
6805 part_die
->is_declaration
= DW_UNSND (&attr
);
6808 part_die
->has_type
= 1;
6810 case DW_AT_abstract_origin
:
6811 case DW_AT_specification
:
6812 case DW_AT_extension
:
6813 part_die
->has_specification
= 1;
6814 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6817 /* Ignore absolute siblings, they might point outside of
6818 the current compile unit. */
6819 if (attr
.form
== DW_FORM_ref_addr
)
6820 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6822 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6824 case DW_AT_byte_size
:
6825 part_die
->has_byte_size
= 1;
6827 case DW_AT_calling_convention
:
6828 /* DWARF doesn't provide a way to identify a program's source-level
6829 entry point. DW_AT_calling_convention attributes are only meant
6830 to describe functions' calling conventions.
6832 However, because it's a necessary piece of information in
6833 Fortran, and because DW_CC_program is the only piece of debugging
6834 information whose definition refers to a 'main program' at all,
6835 several compilers have begun marking Fortran main programs with
6836 DW_CC_program --- even when those functions use the standard
6837 calling conventions.
6839 So until DWARF specifies a way to provide this information and
6840 compilers pick up the new representation, we'll support this
6842 if (DW_UNSND (&attr
) == DW_CC_program
6843 && cu
->language
== language_fortran
)
6844 set_main_name (part_die
->name
);
6851 /* When using the GNU linker, .gnu.linkonce. sections are used to
6852 eliminate duplicate copies of functions and vtables and such.
6853 The linker will arbitrarily choose one and discard the others.
6854 The AT_*_pc values for such functions refer to local labels in
6855 these sections. If the section from that file was discarded, the
6856 labels are not in the output, so the relocs get a value of 0.
6857 If this is a discarded function, mark the pc bounds as invalid,
6858 so that GDB will ignore it. */
6859 if (has_low_pc_attr
&& has_high_pc_attr
6860 && part_die
->lowpc
< part_die
->highpc
6861 && (part_die
->lowpc
!= 0
6862 || dwarf2_per_objfile
->has_section_at_zero
))
6863 part_die
->has_pc_info
= 1;
6868 /* Find a cached partial DIE at OFFSET in CU. */
6870 static struct partial_die_info
*
6871 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6873 struct partial_die_info
*lookup_die
= NULL
;
6874 struct partial_die_info part_die
;
6876 part_die
.offset
= offset
;
6877 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6882 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6883 except in the case of .debug_types DIEs which do not reference
6884 outside their CU (they do however referencing other types via
6887 static struct partial_die_info
*
6888 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6890 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6891 struct partial_die_info
*pd
= NULL
;
6893 if (cu
->per_cu
->from_debug_types
)
6895 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6901 if (offset_in_cu_p (&cu
->header
, offset
))
6903 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6908 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6910 if (per_cu
->cu
== NULL
)
6912 load_partial_comp_unit (per_cu
, cu
->objfile
);
6913 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6914 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6917 per_cu
->cu
->last_used
= 0;
6918 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6920 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6922 struct cleanup
*back_to
;
6923 struct partial_die_info comp_unit_die
;
6924 struct abbrev_info
*abbrev
;
6925 unsigned int bytes_read
;
6928 per_cu
->load_all_dies
= 1;
6930 /* Re-read the DIEs. */
6931 back_to
= make_cleanup (null_cleanup
, 0);
6932 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6934 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6935 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6937 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6938 + per_cu
->cu
->header
.offset
6939 + per_cu
->cu
->header
.first_die_offset
);
6940 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6941 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6942 per_cu
->cu
->objfile
->obfd
,
6943 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6945 if (comp_unit_die
.has_children
)
6946 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6947 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6949 do_cleanups (back_to
);
6951 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6957 internal_error (__FILE__
, __LINE__
,
6958 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6959 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6963 /* Adjust PART_DIE before generating a symbol for it. This function
6964 may set the is_external flag or change the DIE's name. */
6967 fixup_partial_die (struct partial_die_info
*part_die
,
6968 struct dwarf2_cu
*cu
)
6970 /* If we found a reference attribute and the DIE has no name, try
6971 to find a name in the referred to DIE. */
6973 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6975 struct partial_die_info
*spec_die
;
6977 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6979 fixup_partial_die (spec_die
, cu
);
6983 part_die
->name
= spec_die
->name
;
6985 /* Copy DW_AT_external attribute if it is set. */
6986 if (spec_die
->is_external
)
6987 part_die
->is_external
= spec_die
->is_external
;
6991 /* Set default names for some unnamed DIEs. */
6992 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6993 || part_die
->tag
== DW_TAG_class_type
))
6994 part_die
->name
= "(anonymous class)";
6996 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6997 part_die
->name
= "(anonymous namespace)";
6999 if (part_die
->tag
== DW_TAG_structure_type
7000 || part_die
->tag
== DW_TAG_class_type
7001 || part_die
->tag
== DW_TAG_union_type
)
7002 guess_structure_name (part_die
, cu
);
7005 /* Read an attribute value described by an attribute form. */
7008 read_attribute_value (struct attribute
*attr
, unsigned form
,
7009 bfd
*abfd
, gdb_byte
*info_ptr
,
7010 struct dwarf2_cu
*cu
)
7012 struct comp_unit_head
*cu_header
= &cu
->header
;
7013 unsigned int bytes_read
;
7014 struct dwarf_block
*blk
;
7020 case DW_FORM_ref_addr
:
7021 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7022 info_ptr
+= bytes_read
;
7024 case DW_FORM_block2
:
7025 blk
= dwarf_alloc_block (cu
);
7026 blk
->size
= read_2_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
;
7032 case DW_FORM_block4
:
7033 blk
= dwarf_alloc_block (cu
);
7034 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7036 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7037 info_ptr
+= blk
->size
;
7038 DW_BLOCK (attr
) = blk
;
7041 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7045 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7049 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7052 case DW_FORM_string
:
7053 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7054 DW_STRING_IS_CANONICAL (attr
) = 0;
7055 info_ptr
+= bytes_read
;
7058 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7060 DW_STRING_IS_CANONICAL (attr
) = 0;
7061 info_ptr
+= bytes_read
;
7064 blk
= dwarf_alloc_block (cu
);
7065 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7066 info_ptr
+= bytes_read
;
7067 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7068 info_ptr
+= blk
->size
;
7069 DW_BLOCK (attr
) = blk
;
7071 case DW_FORM_block1
:
7072 blk
= dwarf_alloc_block (cu
);
7073 blk
->size
= read_1_byte (abfd
, info_ptr
);
7075 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7076 info_ptr
+= blk
->size
;
7077 DW_BLOCK (attr
) = blk
;
7080 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7084 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7088 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7089 info_ptr
+= bytes_read
;
7092 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7093 info_ptr
+= bytes_read
;
7096 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7100 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7104 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7108 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7112 /* Convert the signature to something we can record in DW_UNSND
7114 NOTE: This is NULL if the type wasn't found. */
7115 DW_SIGNATURED_TYPE (attr
) =
7116 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7119 case DW_FORM_ref_udata
:
7120 DW_ADDR (attr
) = (cu
->header
.offset
7121 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7122 info_ptr
+= bytes_read
;
7124 case DW_FORM_indirect
:
7125 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7126 info_ptr
+= bytes_read
;
7127 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7130 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7131 dwarf_form_name (form
),
7132 bfd_get_filename (abfd
));
7135 /* We have seen instances where the compiler tried to emit a byte
7136 size attribute of -1 which ended up being encoded as an unsigned
7137 0xffffffff. Although 0xffffffff is technically a valid size value,
7138 an object of this size seems pretty unlikely so we can relatively
7139 safely treat these cases as if the size attribute was invalid and
7140 treat them as zero by default. */
7141 if (attr
->name
== DW_AT_byte_size
7142 && form
== DW_FORM_data4
7143 && DW_UNSND (attr
) >= 0xffffffff)
7146 (&symfile_complaints
,
7147 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7148 hex_string (DW_UNSND (attr
)));
7149 DW_UNSND (attr
) = 0;
7155 /* Read an attribute described by an abbreviated attribute. */
7158 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7159 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7161 attr
->name
= abbrev
->name
;
7162 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7165 /* read dwarf information from a buffer */
7168 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7170 return bfd_get_8 (abfd
, buf
);
7174 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7176 return bfd_get_signed_8 (abfd
, buf
);
7180 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7182 return bfd_get_16 (abfd
, buf
);
7186 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7188 return bfd_get_signed_16 (abfd
, buf
);
7192 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7194 return bfd_get_32 (abfd
, buf
);
7198 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7200 return bfd_get_signed_32 (abfd
, buf
);
7204 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7206 return bfd_get_64 (abfd
, buf
);
7210 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7211 unsigned int *bytes_read
)
7213 struct comp_unit_head
*cu_header
= &cu
->header
;
7214 CORE_ADDR retval
= 0;
7216 if (cu_header
->signed_addr_p
)
7218 switch (cu_header
->addr_size
)
7221 retval
= bfd_get_signed_16 (abfd
, buf
);
7224 retval
= bfd_get_signed_32 (abfd
, buf
);
7227 retval
= bfd_get_signed_64 (abfd
, buf
);
7230 internal_error (__FILE__
, __LINE__
,
7231 _("read_address: bad switch, signed [in module %s]"),
7232 bfd_get_filename (abfd
));
7237 switch (cu_header
->addr_size
)
7240 retval
= bfd_get_16 (abfd
, buf
);
7243 retval
= bfd_get_32 (abfd
, buf
);
7246 retval
= bfd_get_64 (abfd
, buf
);
7249 internal_error (__FILE__
, __LINE__
,
7250 _("read_address: bad switch, unsigned [in module %s]"),
7251 bfd_get_filename (abfd
));
7255 *bytes_read
= cu_header
->addr_size
;
7259 /* Read the initial length from a section. The (draft) DWARF 3
7260 specification allows the initial length to take up either 4 bytes
7261 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7262 bytes describe the length and all offsets will be 8 bytes in length
7265 An older, non-standard 64-bit format is also handled by this
7266 function. The older format in question stores the initial length
7267 as an 8-byte quantity without an escape value. Lengths greater
7268 than 2^32 aren't very common which means that the initial 4 bytes
7269 is almost always zero. Since a length value of zero doesn't make
7270 sense for the 32-bit format, this initial zero can be considered to
7271 be an escape value which indicates the presence of the older 64-bit
7272 format. As written, the code can't detect (old format) lengths
7273 greater than 4GB. If it becomes necessary to handle lengths
7274 somewhat larger than 4GB, we could allow other small values (such
7275 as the non-sensical values of 1, 2, and 3) to also be used as
7276 escape values indicating the presence of the old format.
7278 The value returned via bytes_read should be used to increment the
7279 relevant pointer after calling read_initial_length().
7281 [ Note: read_initial_length() and read_offset() are based on the
7282 document entitled "DWARF Debugging Information Format", revision
7283 3, draft 8, dated November 19, 2001. This document was obtained
7286 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7288 This document is only a draft and is subject to change. (So beware.)
7290 Details regarding the older, non-standard 64-bit format were
7291 determined empirically by examining 64-bit ELF files produced by
7292 the SGI toolchain on an IRIX 6.5 machine.
7294 - Kevin, July 16, 2002
7298 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7300 LONGEST length
= bfd_get_32 (abfd
, buf
);
7302 if (length
== 0xffffffff)
7304 length
= bfd_get_64 (abfd
, buf
+ 4);
7307 else if (length
== 0)
7309 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7310 length
= bfd_get_64 (abfd
, buf
);
7321 /* Cover function for read_initial_length.
7322 Returns the length of the object at BUF, and stores the size of the
7323 initial length in *BYTES_READ and stores the size that offsets will be in
7325 If the initial length size is not equivalent to that specified in
7326 CU_HEADER then issue a complaint.
7327 This is useful when reading non-comp-unit headers. */
7330 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7331 const struct comp_unit_head
*cu_header
,
7332 unsigned int *bytes_read
,
7333 unsigned int *offset_size
)
7335 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7337 gdb_assert (cu_header
->initial_length_size
== 4
7338 || cu_header
->initial_length_size
== 8
7339 || cu_header
->initial_length_size
== 12);
7341 if (cu_header
->initial_length_size
!= *bytes_read
)
7342 complaint (&symfile_complaints
,
7343 _("intermixed 32-bit and 64-bit DWARF sections"));
7345 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7349 /* Read an offset from the data stream. The size of the offset is
7350 given by cu_header->offset_size. */
7353 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7354 unsigned int *bytes_read
)
7356 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7357 *bytes_read
= cu_header
->offset_size
;
7361 /* Read an offset from the data stream. */
7364 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7368 switch (offset_size
)
7371 retval
= bfd_get_32 (abfd
, buf
);
7374 retval
= bfd_get_64 (abfd
, buf
);
7377 internal_error (__FILE__
, __LINE__
,
7378 _("read_offset_1: bad switch [in module %s]"),
7379 bfd_get_filename (abfd
));
7386 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7388 /* If the size of a host char is 8 bits, we can return a pointer
7389 to the buffer, otherwise we have to copy the data to a buffer
7390 allocated on the temporary obstack. */
7391 gdb_assert (HOST_CHAR_BIT
== 8);
7396 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7398 /* If the size of a host char is 8 bits, we can return a pointer
7399 to the string, otherwise we have to copy the string to a buffer
7400 allocated on the temporary obstack. */
7401 gdb_assert (HOST_CHAR_BIT
== 8);
7404 *bytes_read_ptr
= 1;
7407 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7408 return (char *) buf
;
7412 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7413 const struct comp_unit_head
*cu_header
,
7414 unsigned int *bytes_read_ptr
)
7416 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7418 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7420 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7421 bfd_get_filename (abfd
));
7424 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7426 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7427 bfd_get_filename (abfd
));
7430 gdb_assert (HOST_CHAR_BIT
== 8);
7431 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7433 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7436 static unsigned long
7437 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7439 unsigned long result
;
7440 unsigned int num_read
;
7450 byte
= bfd_get_8 (abfd
, buf
);
7453 result
|= ((unsigned long)(byte
& 127) << shift
);
7454 if ((byte
& 128) == 0)
7460 *bytes_read_ptr
= num_read
;
7465 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7468 int i
, shift
, num_read
;
7477 byte
= bfd_get_8 (abfd
, buf
);
7480 result
|= ((long)(byte
& 127) << shift
);
7482 if ((byte
& 128) == 0)
7487 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7488 result
|= -(((long)1) << shift
);
7489 *bytes_read_ptr
= num_read
;
7493 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7496 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7502 byte
= bfd_get_8 (abfd
, buf
);
7504 if ((byte
& 128) == 0)
7510 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7517 cu
->language
= language_c
;
7519 case DW_LANG_C_plus_plus
:
7520 cu
->language
= language_cplus
;
7522 case DW_LANG_Fortran77
:
7523 case DW_LANG_Fortran90
:
7524 case DW_LANG_Fortran95
:
7525 cu
->language
= language_fortran
;
7527 case DW_LANG_Mips_Assembler
:
7528 cu
->language
= language_asm
;
7531 cu
->language
= language_java
;
7535 cu
->language
= language_ada
;
7537 case DW_LANG_Modula2
:
7538 cu
->language
= language_m2
;
7540 case DW_LANG_Pascal83
:
7541 cu
->language
= language_pascal
;
7544 cu
->language
= language_objc
;
7546 case DW_LANG_Cobol74
:
7547 case DW_LANG_Cobol85
:
7549 cu
->language
= language_minimal
;
7552 cu
->language_defn
= language_def (cu
->language
);
7555 /* Return the named attribute or NULL if not there. */
7557 static struct attribute
*
7558 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7561 struct attribute
*spec
= NULL
;
7563 for (i
= 0; i
< die
->num_attrs
; ++i
)
7565 if (die
->attrs
[i
].name
== name
)
7566 return &die
->attrs
[i
];
7567 if (die
->attrs
[i
].name
== DW_AT_specification
7568 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7569 spec
= &die
->attrs
[i
];
7574 die
= follow_die_ref (die
, spec
, &cu
);
7575 return dwarf2_attr (die
, name
, cu
);
7581 /* Return the named attribute or NULL if not there,
7582 but do not follow DW_AT_specification, etc.
7583 This is for use in contexts where we're reading .debug_types dies.
7584 Following DW_AT_specification, DW_AT_abstract_origin will take us
7585 back up the chain, and we want to go down. */
7587 static struct attribute
*
7588 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7589 struct dwarf2_cu
*cu
)
7593 for (i
= 0; i
< die
->num_attrs
; ++i
)
7594 if (die
->attrs
[i
].name
== name
)
7595 return &die
->attrs
[i
];
7600 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7601 and holds a non-zero value. This function should only be used for
7602 DW_FORM_flag attributes. */
7605 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7607 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7609 return (attr
&& DW_UNSND (attr
));
7613 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7615 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7616 which value is non-zero. However, we have to be careful with
7617 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7618 (via dwarf2_flag_true_p) follows this attribute. So we may
7619 end up accidently finding a declaration attribute that belongs
7620 to a different DIE referenced by the specification attribute,
7621 even though the given DIE does not have a declaration attribute. */
7622 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7623 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7626 /* Return the die giving the specification for DIE, if there is
7627 one. *SPEC_CU is the CU containing DIE on input, and the CU
7628 containing the return value on output. If there is no
7629 specification, but there is an abstract origin, that is
7632 static struct die_info
*
7633 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7635 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7638 if (spec_attr
== NULL
)
7639 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7641 if (spec_attr
== NULL
)
7644 return follow_die_ref (die
, spec_attr
, spec_cu
);
7647 /* Free the line_header structure *LH, and any arrays and strings it
7650 free_line_header (struct line_header
*lh
)
7652 if (lh
->standard_opcode_lengths
)
7653 xfree (lh
->standard_opcode_lengths
);
7655 /* Remember that all the lh->file_names[i].name pointers are
7656 pointers into debug_line_buffer, and don't need to be freed. */
7658 xfree (lh
->file_names
);
7660 /* Similarly for the include directory names. */
7661 if (lh
->include_dirs
)
7662 xfree (lh
->include_dirs
);
7668 /* Add an entry to LH's include directory table. */
7670 add_include_dir (struct line_header
*lh
, char *include_dir
)
7672 /* Grow the array if necessary. */
7673 if (lh
->include_dirs_size
== 0)
7675 lh
->include_dirs_size
= 1; /* for testing */
7676 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7677 * sizeof (*lh
->include_dirs
));
7679 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7681 lh
->include_dirs_size
*= 2;
7682 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7683 (lh
->include_dirs_size
7684 * sizeof (*lh
->include_dirs
)));
7687 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7691 /* Add an entry to LH's file name table. */
7693 add_file_name (struct line_header
*lh
,
7695 unsigned int dir_index
,
7696 unsigned int mod_time
,
7697 unsigned int length
)
7699 struct file_entry
*fe
;
7701 /* Grow the array if necessary. */
7702 if (lh
->file_names_size
== 0)
7704 lh
->file_names_size
= 1; /* for testing */
7705 lh
->file_names
= xmalloc (lh
->file_names_size
7706 * sizeof (*lh
->file_names
));
7708 else if (lh
->num_file_names
>= lh
->file_names_size
)
7710 lh
->file_names_size
*= 2;
7711 lh
->file_names
= xrealloc (lh
->file_names
,
7712 (lh
->file_names_size
7713 * sizeof (*lh
->file_names
)));
7716 fe
= &lh
->file_names
[lh
->num_file_names
++];
7718 fe
->dir_index
= dir_index
;
7719 fe
->mod_time
= mod_time
;
7720 fe
->length
= length
;
7726 /* Read the statement program header starting at OFFSET in
7727 .debug_line, according to the endianness of ABFD. Return a pointer
7728 to a struct line_header, allocated using xmalloc.
7730 NOTE: the strings in the include directory and file name tables of
7731 the returned object point into debug_line_buffer, and must not be
7733 static struct line_header
*
7734 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7735 struct dwarf2_cu
*cu
)
7737 struct cleanup
*back_to
;
7738 struct line_header
*lh
;
7740 unsigned int bytes_read
, offset_size
;
7742 char *cur_dir
, *cur_file
;
7744 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7746 complaint (&symfile_complaints
, _("missing .debug_line section"));
7750 /* Make sure that at least there's room for the total_length field.
7751 That could be 12 bytes long, but we're just going to fudge that. */
7752 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7754 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7758 lh
= xmalloc (sizeof (*lh
));
7759 memset (lh
, 0, sizeof (*lh
));
7760 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7763 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7765 /* Read in the header. */
7767 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7768 &bytes_read
, &offset_size
);
7769 line_ptr
+= bytes_read
;
7770 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7771 + dwarf2_per_objfile
->line
.size
))
7773 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7776 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7777 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7779 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7780 line_ptr
+= offset_size
;
7781 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7783 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7785 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7787 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7789 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7791 lh
->standard_opcode_lengths
7792 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7794 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7795 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7797 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7801 /* Read directory table. */
7802 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7804 line_ptr
+= bytes_read
;
7805 add_include_dir (lh
, cur_dir
);
7807 line_ptr
+= bytes_read
;
7809 /* Read file name table. */
7810 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7812 unsigned int dir_index
, mod_time
, length
;
7814 line_ptr
+= bytes_read
;
7815 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7816 line_ptr
+= bytes_read
;
7817 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7818 line_ptr
+= bytes_read
;
7819 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7820 line_ptr
+= bytes_read
;
7822 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7824 line_ptr
+= bytes_read
;
7825 lh
->statement_program_start
= line_ptr
;
7827 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7828 + dwarf2_per_objfile
->line
.size
))
7829 complaint (&symfile_complaints
,
7830 _("line number info header doesn't fit in `.debug_line' section"));
7832 discard_cleanups (back_to
);
7836 /* This function exists to work around a bug in certain compilers
7837 (particularly GCC 2.95), in which the first line number marker of a
7838 function does not show up until after the prologue, right before
7839 the second line number marker. This function shifts ADDRESS down
7840 to the beginning of the function if necessary, and is called on
7841 addresses passed to record_line. */
7844 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7846 struct function_range
*fn
;
7848 /* Find the function_range containing address. */
7853 cu
->cached_fn
= cu
->first_fn
;
7857 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7863 while (fn
&& fn
!= cu
->cached_fn
)
7864 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7874 if (address
!= fn
->lowpc
)
7875 complaint (&symfile_complaints
,
7876 _("misplaced first line number at 0x%lx for '%s'"),
7877 (unsigned long) address
, fn
->name
);
7882 /* Decode the Line Number Program (LNP) for the given line_header
7883 structure and CU. The actual information extracted and the type
7884 of structures created from the LNP depends on the value of PST.
7886 1. If PST is NULL, then this procedure uses the data from the program
7887 to create all necessary symbol tables, and their linetables.
7888 The compilation directory of the file is passed in COMP_DIR,
7889 and must not be NULL.
7891 2. If PST is not NULL, this procedure reads the program to determine
7892 the list of files included by the unit represented by PST, and
7893 builds all the associated partial symbol tables. In this case,
7894 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7895 is not used to compute the full name of the symtab, and therefore
7896 omitting it when building the partial symtab does not introduce
7897 the potential for inconsistency - a partial symtab and its associated
7898 symbtab having a different fullname -). */
7901 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7902 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7904 gdb_byte
*line_ptr
, *extended_end
;
7906 unsigned int bytes_read
, extended_len
;
7907 unsigned char op_code
, extended_op
, adj_opcode
;
7909 struct objfile
*objfile
= cu
->objfile
;
7910 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7911 const int decode_for_pst_p
= (pst
!= NULL
);
7912 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7914 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7916 line_ptr
= lh
->statement_program_start
;
7917 line_end
= lh
->statement_program_end
;
7919 /* Read the statement sequences until there's nothing left. */
7920 while (line_ptr
< line_end
)
7922 /* state machine registers */
7923 CORE_ADDR address
= 0;
7924 unsigned int file
= 1;
7925 unsigned int line
= 1;
7926 unsigned int column
= 0;
7927 int is_stmt
= lh
->default_is_stmt
;
7928 int basic_block
= 0;
7929 int end_sequence
= 0;
7932 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7934 /* Start a subfile for the current file of the state machine. */
7935 /* lh->include_dirs and lh->file_names are 0-based, but the
7936 directory and file name numbers in the statement program
7938 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7942 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7944 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7947 /* Decode the table. */
7948 while (!end_sequence
)
7950 op_code
= read_1_byte (abfd
, line_ptr
);
7952 if (line_ptr
> line_end
)
7954 dwarf2_debug_line_missing_end_sequence_complaint ();
7958 if (op_code
>= lh
->opcode_base
)
7960 /* Special operand. */
7961 adj_opcode
= op_code
- lh
->opcode_base
;
7962 address
+= (adj_opcode
/ lh
->line_range
)
7963 * lh
->minimum_instruction_length
;
7964 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7965 if (lh
->num_file_names
< file
|| file
== 0)
7966 dwarf2_debug_line_missing_file_complaint ();
7969 lh
->file_names
[file
- 1].included_p
= 1;
7970 if (!decode_for_pst_p
&& is_stmt
)
7972 if (last_subfile
!= current_subfile
)
7974 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7976 record_line (last_subfile
, 0, addr
);
7977 last_subfile
= current_subfile
;
7979 /* Append row to matrix using current values. */
7980 addr
= check_cu_functions (address
, cu
);
7981 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7982 record_line (current_subfile
, line
, addr
);
7987 else switch (op_code
)
7989 case DW_LNS_extended_op
:
7990 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7991 line_ptr
+= bytes_read
;
7992 extended_end
= line_ptr
+ extended_len
;
7993 extended_op
= read_1_byte (abfd
, line_ptr
);
7995 switch (extended_op
)
7997 case DW_LNE_end_sequence
:
8000 case DW_LNE_set_address
:
8001 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8002 line_ptr
+= bytes_read
;
8003 address
+= baseaddr
;
8005 case DW_LNE_define_file
:
8008 unsigned int dir_index
, mod_time
, length
;
8010 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8011 line_ptr
+= bytes_read
;
8013 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8014 line_ptr
+= bytes_read
;
8016 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8017 line_ptr
+= bytes_read
;
8019 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8020 line_ptr
+= bytes_read
;
8021 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8024 case DW_LNE_set_discriminator
:
8025 /* The discriminator is not interesting to the debugger;
8027 line_ptr
= extended_end
;
8030 complaint (&symfile_complaints
,
8031 _("mangled .debug_line section"));
8034 /* Make sure that we parsed the extended op correctly. If e.g.
8035 we expected a different address size than the producer used,
8036 we may have read the wrong number of bytes. */
8037 if (line_ptr
!= extended_end
)
8039 complaint (&symfile_complaints
,
8040 _("mangled .debug_line section"));
8045 if (lh
->num_file_names
< file
|| file
== 0)
8046 dwarf2_debug_line_missing_file_complaint ();
8049 lh
->file_names
[file
- 1].included_p
= 1;
8050 if (!decode_for_pst_p
&& is_stmt
)
8052 if (last_subfile
!= current_subfile
)
8054 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8056 record_line (last_subfile
, 0, addr
);
8057 last_subfile
= current_subfile
;
8059 addr
= check_cu_functions (address
, cu
);
8060 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8061 record_line (current_subfile
, line
, addr
);
8066 case DW_LNS_advance_pc
:
8067 address
+= lh
->minimum_instruction_length
8068 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8069 line_ptr
+= bytes_read
;
8071 case DW_LNS_advance_line
:
8072 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8073 line_ptr
+= bytes_read
;
8075 case DW_LNS_set_file
:
8077 /* The arrays lh->include_dirs and lh->file_names are
8078 0-based, but the directory and file name numbers in
8079 the statement program are 1-based. */
8080 struct file_entry
*fe
;
8083 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8084 line_ptr
+= bytes_read
;
8085 if (lh
->num_file_names
< file
|| file
== 0)
8086 dwarf2_debug_line_missing_file_complaint ();
8089 fe
= &lh
->file_names
[file
- 1];
8091 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8092 if (!decode_for_pst_p
)
8094 last_subfile
= current_subfile
;
8095 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8100 case DW_LNS_set_column
:
8101 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8102 line_ptr
+= bytes_read
;
8104 case DW_LNS_negate_stmt
:
8105 is_stmt
= (!is_stmt
);
8107 case DW_LNS_set_basic_block
:
8110 /* Add to the address register of the state machine the
8111 address increment value corresponding to special opcode
8112 255. I.e., this value is scaled by the minimum
8113 instruction length since special opcode 255 would have
8114 scaled the the increment. */
8115 case DW_LNS_const_add_pc
:
8116 address
+= (lh
->minimum_instruction_length
8117 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8119 case DW_LNS_fixed_advance_pc
:
8120 address
+= read_2_bytes (abfd
, line_ptr
);
8125 /* Unknown standard opcode, ignore it. */
8128 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8130 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8131 line_ptr
+= bytes_read
;
8136 if (lh
->num_file_names
< file
|| file
== 0)
8137 dwarf2_debug_line_missing_file_complaint ();
8140 lh
->file_names
[file
- 1].included_p
= 1;
8141 if (!decode_for_pst_p
)
8143 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8144 record_line (current_subfile
, 0, addr
);
8149 if (decode_for_pst_p
)
8153 /* Now that we're done scanning the Line Header Program, we can
8154 create the psymtab of each included file. */
8155 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8156 if (lh
->file_names
[file_index
].included_p
== 1)
8158 const struct file_entry fe
= lh
->file_names
[file_index
];
8159 char *include_name
= fe
.name
;
8160 char *dir_name
= NULL
;
8161 char *pst_filename
= pst
->filename
;
8164 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8166 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8168 include_name
= concat (dir_name
, SLASH_STRING
,
8169 include_name
, (char *)NULL
);
8170 make_cleanup (xfree
, include_name
);
8173 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8175 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8176 pst_filename
, (char *)NULL
);
8177 make_cleanup (xfree
, pst_filename
);
8180 if (strcmp (include_name
, pst_filename
) != 0)
8181 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8186 /* Make sure a symtab is created for every file, even files
8187 which contain only variables (i.e. no code with associated
8191 struct file_entry
*fe
;
8193 for (i
= 0; i
< lh
->num_file_names
; i
++)
8196 fe
= &lh
->file_names
[i
];
8198 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8199 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8201 /* Skip the main file; we don't need it, and it must be
8202 allocated last, so that it will show up before the
8203 non-primary symtabs in the objfile's symtab list. */
8204 if (current_subfile
== first_subfile
)
8207 if (current_subfile
->symtab
== NULL
)
8208 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8210 fe
->symtab
= current_subfile
->symtab
;
8215 /* Start a subfile for DWARF. FILENAME is the name of the file and
8216 DIRNAME the name of the source directory which contains FILENAME
8217 or NULL if not known. COMP_DIR is the compilation directory for the
8218 linetable's compilation unit or NULL if not known.
8219 This routine tries to keep line numbers from identical absolute and
8220 relative file names in a common subfile.
8222 Using the `list' example from the GDB testsuite, which resides in
8223 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8224 of /srcdir/list0.c yields the following debugging information for list0.c:
8226 DW_AT_name: /srcdir/list0.c
8227 DW_AT_comp_dir: /compdir
8228 files.files[0].name: list0.h
8229 files.files[0].dir: /srcdir
8230 files.files[1].name: list0.c
8231 files.files[1].dir: /srcdir
8233 The line number information for list0.c has to end up in a single
8234 subfile, so that `break /srcdir/list0.c:1' works as expected.
8235 start_subfile will ensure that this happens provided that we pass the
8236 concatenation of files.files[1].dir and files.files[1].name as the
8240 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8244 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8245 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8246 second argument to start_subfile. To be consistent, we do the
8247 same here. In order not to lose the line information directory,
8248 we concatenate it to the filename when it makes sense.
8249 Note that the Dwarf3 standard says (speaking of filenames in line
8250 information): ``The directory index is ignored for file names
8251 that represent full path names''. Thus ignoring dirname in the
8252 `else' branch below isn't an issue. */
8254 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8255 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8257 fullname
= filename
;
8259 start_subfile (fullname
, comp_dir
);
8261 if (fullname
!= filename
)
8266 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8267 struct dwarf2_cu
*cu
)
8269 struct objfile
*objfile
= cu
->objfile
;
8270 struct comp_unit_head
*cu_header
= &cu
->header
;
8272 /* NOTE drow/2003-01-30: There used to be a comment and some special
8273 code here to turn a symbol with DW_AT_external and a
8274 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8275 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8276 with some versions of binutils) where shared libraries could have
8277 relocations against symbols in their debug information - the
8278 minimal symbol would have the right address, but the debug info
8279 would not. It's no longer necessary, because we will explicitly
8280 apply relocations when we read in the debug information now. */
8282 /* A DW_AT_location attribute with no contents indicates that a
8283 variable has been optimized away. */
8284 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8286 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8290 /* Handle one degenerate form of location expression specially, to
8291 preserve GDB's previous behavior when section offsets are
8292 specified. If this is just a DW_OP_addr then mark this symbol
8295 if (attr_form_is_block (attr
)
8296 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8297 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8301 SYMBOL_VALUE_ADDRESS (sym
) =
8302 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8303 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8304 fixup_symbol_section (sym
, objfile
);
8305 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8306 SYMBOL_SECTION (sym
));
8310 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8311 expression evaluator, and use LOC_COMPUTED only when necessary
8312 (i.e. when the value of a register or memory location is
8313 referenced, or a thread-local block, etc.). Then again, it might
8314 not be worthwhile. I'm assuming that it isn't unless performance
8315 or memory numbers show me otherwise. */
8317 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8318 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8321 /* Given a pointer to a DWARF information entry, figure out if we need
8322 to make a symbol table entry for it, and if so, create a new entry
8323 and return a pointer to it.
8324 If TYPE is NULL, determine symbol type from the die, otherwise
8325 used the passed type. */
8327 static struct symbol
*
8328 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8330 struct objfile
*objfile
= cu
->objfile
;
8331 struct symbol
*sym
= NULL
;
8333 struct attribute
*attr
= NULL
;
8334 struct attribute
*attr2
= NULL
;
8336 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8338 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8340 if (die
->tag
!= DW_TAG_namespace
)
8341 name
= dwarf2_linkage_name (die
, cu
);
8343 name
= TYPE_NAME (type
);
8347 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8348 sizeof (struct symbol
));
8349 OBJSTAT (objfile
, n_syms
++);
8350 memset (sym
, 0, sizeof (struct symbol
));
8352 /* Cache this symbol's name and the name's demangled form (if any). */
8353 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8354 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 0, objfile
);
8356 /* Default assumptions.
8357 Use the passed type or decode it from the die. */
8358 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8359 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8361 SYMBOL_TYPE (sym
) = type
;
8363 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8364 attr
= dwarf2_attr (die
,
8365 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8369 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8372 attr
= dwarf2_attr (die
,
8373 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8377 int file_index
= DW_UNSND (attr
);
8378 if (cu
->line_header
== NULL
8379 || file_index
> cu
->line_header
->num_file_names
)
8380 complaint (&symfile_complaints
,
8381 _("file index out of range"));
8382 else if (file_index
> 0)
8384 struct file_entry
*fe
;
8385 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8386 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8393 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8396 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8398 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8400 case DW_TAG_subprogram
:
8401 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8403 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8404 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8405 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8406 || cu
->language
== language_ada
)
8408 /* Subprograms marked external are stored as a global symbol.
8409 Ada subprograms, whether marked external or not, are always
8410 stored as a global symbol, because we want to be able to
8411 access them globally. For instance, we want to be able
8412 to break on a nested subprogram without having to
8413 specify the context. */
8414 add_symbol_to_list (sym
, &global_symbols
);
8418 add_symbol_to_list (sym
, cu
->list_in_scope
);
8421 case DW_TAG_inlined_subroutine
:
8422 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8424 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8425 SYMBOL_INLINED (sym
) = 1;
8426 /* Do not add the symbol to any lists. It will be found via
8427 BLOCK_FUNCTION from the blockvector. */
8429 case DW_TAG_variable
:
8430 /* Compilation with minimal debug info may result in variables
8431 with missing type entries. Change the misleading `void' type
8432 to something sensible. */
8433 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8435 = objfile_type (objfile
)->nodebug_data_symbol
;
8437 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8440 dwarf2_const_value (attr
, sym
, cu
);
8441 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8442 if (attr2
&& (DW_UNSND (attr2
) != 0))
8443 add_symbol_to_list (sym
, &global_symbols
);
8445 add_symbol_to_list (sym
, cu
->list_in_scope
);
8448 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8451 var_decode_location (attr
, sym
, cu
);
8452 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8453 if (attr2
&& (DW_UNSND (attr2
) != 0))
8454 add_symbol_to_list (sym
, &global_symbols
);
8456 add_symbol_to_list (sym
, cu
->list_in_scope
);
8460 /* We do not know the address of this symbol.
8461 If it is an external symbol and we have type information
8462 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8463 The address of the variable will then be determined from
8464 the minimal symbol table whenever the variable is
8466 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8467 if (attr2
&& (DW_UNSND (attr2
) != 0)
8468 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8470 struct pending
**list_to_add
;
8472 /* A variable with DW_AT_external is never static, but it
8473 may be block-scoped. */
8474 list_to_add
= (cu
->list_in_scope
== &file_symbols
8475 ? &global_symbols
: cu
->list_in_scope
);
8477 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8478 add_symbol_to_list (sym
, list_to_add
);
8480 else if (!die_is_declaration (die
, cu
))
8482 /* Use the default LOC_OPTIMIZED_OUT class. */
8483 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8484 add_symbol_to_list (sym
, cu
->list_in_scope
);
8488 case DW_TAG_formal_parameter
:
8489 /* If we are inside a function, mark this as an argument. If
8490 not, we might be looking at an argument to an inlined function
8491 when we do not have enough information to show inlined frames;
8492 pretend it's a local variable in that case so that the user can
8494 if (context_stack_depth
> 0
8495 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8496 SYMBOL_IS_ARGUMENT (sym
) = 1;
8497 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8500 var_decode_location (attr
, sym
, cu
);
8502 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8505 dwarf2_const_value (attr
, sym
, cu
);
8507 add_symbol_to_list (sym
, cu
->list_in_scope
);
8509 case DW_TAG_unspecified_parameters
:
8510 /* From varargs functions; gdb doesn't seem to have any
8511 interest in this information, so just ignore it for now.
8514 case DW_TAG_class_type
:
8515 case DW_TAG_interface_type
:
8516 case DW_TAG_structure_type
:
8517 case DW_TAG_union_type
:
8518 case DW_TAG_set_type
:
8519 case DW_TAG_enumeration_type
:
8520 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8521 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8523 /* Make sure that the symbol includes appropriate enclosing
8524 classes/namespaces in its name. These are calculated in
8525 read_structure_type, and the correct name is saved in
8528 if (cu
->language
== language_cplus
8529 || cu
->language
== language_java
)
8531 struct type
*type
= SYMBOL_TYPE (sym
);
8533 if (TYPE_TAG_NAME (type
) != NULL
)
8535 /* FIXME: carlton/2003-11-10: Should this use
8536 SYMBOL_SET_NAMES instead? (The same problem also
8537 arises further down in this function.) */
8538 /* The type's name is already allocated along with
8539 this objfile, so we don't need to duplicate it
8541 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8546 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8547 really ever be static objects: otherwise, if you try
8548 to, say, break of a class's method and you're in a file
8549 which doesn't mention that class, it won't work unless
8550 the check for all static symbols in lookup_symbol_aux
8551 saves you. See the OtherFileClass tests in
8552 gdb.c++/namespace.exp. */
8554 struct pending
**list_to_add
;
8556 list_to_add
= (cu
->list_in_scope
== &file_symbols
8557 && (cu
->language
== language_cplus
8558 || cu
->language
== language_java
)
8559 ? &global_symbols
: cu
->list_in_scope
);
8561 add_symbol_to_list (sym
, list_to_add
);
8563 /* The semantics of C++ state that "struct foo { ... }" also
8564 defines a typedef for "foo". A Java class declaration also
8565 defines a typedef for the class. */
8566 if (cu
->language
== language_cplus
8567 || cu
->language
== language_java
8568 || cu
->language
== language_ada
)
8570 /* The symbol's name is already allocated along with
8571 this objfile, so we don't need to duplicate it for
8573 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8574 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8578 case DW_TAG_typedef
:
8579 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8580 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8581 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8582 add_symbol_to_list (sym
, cu
->list_in_scope
);
8584 case DW_TAG_base_type
:
8585 case DW_TAG_subrange_type
:
8586 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8587 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8588 add_symbol_to_list (sym
, cu
->list_in_scope
);
8590 case DW_TAG_enumerator
:
8591 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8592 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8595 dwarf2_const_value (attr
, sym
, cu
);
8598 /* NOTE: carlton/2003-11-10: See comment above in the
8599 DW_TAG_class_type, etc. block. */
8601 struct pending
**list_to_add
;
8603 list_to_add
= (cu
->list_in_scope
== &file_symbols
8604 && (cu
->language
== language_cplus
8605 || cu
->language
== language_java
)
8606 ? &global_symbols
: cu
->list_in_scope
);
8608 add_symbol_to_list (sym
, list_to_add
);
8611 case DW_TAG_namespace
:
8612 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8613 add_symbol_to_list (sym
, &global_symbols
);
8616 /* Not a tag we recognize. Hopefully we aren't processing
8617 trash data, but since we must specifically ignore things
8618 we don't recognize, there is nothing else we should do at
8620 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8621 dwarf_tag_name (die
->tag
));
8625 /* For the benefit of old versions of GCC, check for anonymous
8626 namespaces based on the demangled name. */
8627 if (!processing_has_namespace_info
8628 && cu
->language
== language_cplus
8629 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8630 cp_scan_for_anonymous_namespaces (sym
);
8635 /* Copy constant value from an attribute to a symbol. */
8638 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8639 struct dwarf2_cu
*cu
)
8641 struct objfile
*objfile
= cu
->objfile
;
8642 struct comp_unit_head
*cu_header
= &cu
->header
;
8643 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8644 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8645 struct dwarf_block
*blk
;
8650 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8651 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8652 cu_header
->addr_size
,
8653 TYPE_LENGTH (SYMBOL_TYPE
8655 SYMBOL_VALUE_BYTES (sym
) =
8656 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8657 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8658 it's body - store_unsigned_integer. */
8659 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8660 byte_order
, DW_ADDR (attr
));
8661 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8663 case DW_FORM_string
:
8665 /* DW_STRING is already allocated on the obstack, point directly
8667 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8668 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8670 case DW_FORM_block1
:
8671 case DW_FORM_block2
:
8672 case DW_FORM_block4
:
8674 blk
= DW_BLOCK (attr
);
8675 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8676 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8678 TYPE_LENGTH (SYMBOL_TYPE
8680 SYMBOL_VALUE_BYTES (sym
) =
8681 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8682 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8683 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8686 /* The DW_AT_const_value attributes are supposed to carry the
8687 symbol's value "represented as it would be on the target
8688 architecture." By the time we get here, it's already been
8689 converted to host endianness, so we just need to sign- or
8690 zero-extend it as appropriate. */
8692 dwarf2_const_value_data (attr
, sym
, 8);
8695 dwarf2_const_value_data (attr
, sym
, 16);
8698 dwarf2_const_value_data (attr
, sym
, 32);
8701 dwarf2_const_value_data (attr
, sym
, 64);
8705 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8706 SYMBOL_CLASS (sym
) = LOC_CONST
;
8710 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8711 SYMBOL_CLASS (sym
) = LOC_CONST
;
8715 complaint (&symfile_complaints
,
8716 _("unsupported const value attribute form: '%s'"),
8717 dwarf_form_name (attr
->form
));
8718 SYMBOL_VALUE (sym
) = 0;
8719 SYMBOL_CLASS (sym
) = LOC_CONST
;
8725 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8726 or zero-extend it as appropriate for the symbol's type. */
8728 dwarf2_const_value_data (struct attribute
*attr
,
8732 LONGEST l
= DW_UNSND (attr
);
8734 if (bits
< sizeof (l
) * 8)
8736 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8737 l
&= ((LONGEST
) 1 << bits
) - 1;
8739 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8742 SYMBOL_VALUE (sym
) = l
;
8743 SYMBOL_CLASS (sym
) = LOC_CONST
;
8747 /* Return the type of the die in question using its DW_AT_type attribute. */
8749 static struct type
*
8750 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8753 struct attribute
*type_attr
;
8754 struct die_info
*type_die
;
8756 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8759 /* A missing DW_AT_type represents a void type. */
8760 return objfile_type (cu
->objfile
)->builtin_void
;
8763 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8765 type
= tag_type_to_type (type_die
, cu
);
8768 dump_die_for_error (type_die
);
8769 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8775 /* True iff CU's producer generates GNAT Ada auxiliary information
8776 that allows to find parallel types through that information instead
8777 of having to do expensive parallel lookups by type name. */
8780 need_gnat_info (struct dwarf2_cu
*cu
)
8782 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8783 of GNAT produces this auxiliary information, without any indication
8784 that it is produced. Part of enhancing the FSF version of GNAT
8785 to produce that information will be to put in place an indicator
8786 that we can use in order to determine whether the descriptive type
8787 info is available or not. One suggestion that has been made is
8788 to use a new attribute, attached to the CU die. For now, assume
8789 that the descriptive type info is not available. */
8794 /* Return the auxiliary type of the die in question using its
8795 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8796 attribute is not present. */
8798 static struct type
*
8799 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8802 struct attribute
*type_attr
;
8803 struct die_info
*type_die
;
8805 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
8809 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8810 type
= tag_type_to_type (type_die
, cu
);
8813 dump_die_for_error (type_die
);
8814 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8820 /* If DIE has a descriptive_type attribute, then set the TYPE's
8821 descriptive type accordingly. */
8824 set_descriptive_type (struct type
*type
, struct die_info
*die
,
8825 struct dwarf2_cu
*cu
)
8827 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
8829 if (descriptive_type
)
8831 ALLOCATE_GNAT_AUX_TYPE (type
);
8832 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
8836 /* Return the containing type of the die in question using its
8837 DW_AT_containing_type attribute. */
8839 static struct type
*
8840 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8842 struct type
*type
= NULL
;
8843 struct attribute
*type_attr
;
8844 struct die_info
*type_die
= NULL
;
8846 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8849 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8850 type
= tag_type_to_type (type_die
, cu
);
8855 dump_die_for_error (type_die
);
8856 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8862 static struct type
*
8863 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8865 struct type
*this_type
;
8867 this_type
= read_type_die (die
, cu
);
8870 dump_die_for_error (die
);
8871 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8877 static struct type
*
8878 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8880 struct type
*this_type
;
8882 this_type
= get_die_type (die
, cu
);
8888 case DW_TAG_class_type
:
8889 case DW_TAG_interface_type
:
8890 case DW_TAG_structure_type
:
8891 case DW_TAG_union_type
:
8892 this_type
= read_structure_type (die
, cu
);
8894 case DW_TAG_enumeration_type
:
8895 this_type
= read_enumeration_type (die
, cu
);
8897 case DW_TAG_subprogram
:
8898 case DW_TAG_subroutine_type
:
8899 case DW_TAG_inlined_subroutine
:
8900 this_type
= read_subroutine_type (die
, cu
);
8902 case DW_TAG_array_type
:
8903 this_type
= read_array_type (die
, cu
);
8905 case DW_TAG_set_type
:
8906 this_type
= read_set_type (die
, cu
);
8908 case DW_TAG_pointer_type
:
8909 this_type
= read_tag_pointer_type (die
, cu
);
8911 case DW_TAG_ptr_to_member_type
:
8912 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8914 case DW_TAG_reference_type
:
8915 this_type
= read_tag_reference_type (die
, cu
);
8917 case DW_TAG_const_type
:
8918 this_type
= read_tag_const_type (die
, cu
);
8920 case DW_TAG_volatile_type
:
8921 this_type
= read_tag_volatile_type (die
, cu
);
8923 case DW_TAG_string_type
:
8924 this_type
= read_tag_string_type (die
, cu
);
8926 case DW_TAG_typedef
:
8927 this_type
= read_typedef (die
, cu
);
8929 case DW_TAG_subrange_type
:
8930 this_type
= read_subrange_type (die
, cu
);
8932 case DW_TAG_base_type
:
8933 this_type
= read_base_type (die
, cu
);
8935 case DW_TAG_unspecified_type
:
8936 this_type
= read_unspecified_type (die
, cu
);
8938 case DW_TAG_namespace
:
8939 this_type
= read_namespace_type (die
, cu
);
8942 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8943 dwarf_tag_name (die
->tag
));
8950 /* Return the name of the namespace/class that DIE is defined within,
8951 or "" if we can't tell. The caller should not xfree the result.
8953 For example, if we're within the method foo() in the following
8963 then determine_prefix on foo's die will return "N::C". */
8966 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8968 struct die_info
*parent
, *spec_die
;
8969 struct dwarf2_cu
*spec_cu
;
8970 struct type
*parent_type
;
8972 if (cu
->language
!= language_cplus
8973 && cu
->language
!= language_java
)
8976 /* We have to be careful in the presence of DW_AT_specification.
8977 For example, with GCC 3.4, given the code
8981 // Definition of N::foo.
8985 then we'll have a tree of DIEs like this:
8987 1: DW_TAG_compile_unit
8988 2: DW_TAG_namespace // N
8989 3: DW_TAG_subprogram // declaration of N::foo
8990 4: DW_TAG_subprogram // definition of N::foo
8991 DW_AT_specification // refers to die #3
8993 Thus, when processing die #4, we have to pretend that we're in
8994 the context of its DW_AT_specification, namely the contex of die
8997 spec_die
= die_specification (die
, &spec_cu
);
8998 if (spec_die
== NULL
)
8999 parent
= die
->parent
;
9002 parent
= spec_die
->parent
;
9009 switch (parent
->tag
)
9011 case DW_TAG_namespace
:
9012 parent_type
= read_type_die (parent
, cu
);
9013 /* We give a name to even anonymous namespaces. */
9014 return TYPE_TAG_NAME (parent_type
);
9015 case DW_TAG_class_type
:
9016 case DW_TAG_interface_type
:
9017 case DW_TAG_structure_type
:
9018 case DW_TAG_union_type
:
9019 parent_type
= read_type_die (parent
, cu
);
9020 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9021 return TYPE_TAG_NAME (parent_type
);
9023 /* An anonymous structure is only allowed non-static data
9024 members; no typedefs, no member functions, et cetera.
9025 So it does not need a prefix. */
9028 return determine_prefix (parent
, cu
);
9032 /* Return a newly-allocated string formed by concatenating PREFIX and
9033 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9034 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9035 perform an obconcat, otherwise allocate storage for the result. The CU argument
9036 is used to determine the language and hence, the appropriate separator. */
9038 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9041 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9042 struct dwarf2_cu
*cu
)
9046 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9048 else if (cu
->language
== language_java
)
9060 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9061 strcpy (retval
, prefix
);
9062 strcat (retval
, sep
);
9063 strcat (retval
, suffix
);
9068 /* We have an obstack. */
9069 return obconcat (obs
, prefix
, sep
, suffix
);
9073 /* Return sibling of die, NULL if no sibling. */
9075 static struct die_info
*
9076 sibling_die (struct die_info
*die
)
9078 return die
->sibling
;
9081 /* Get linkage name of a die, return NULL if not found. */
9084 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9086 struct attribute
*attr
;
9088 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9089 if (attr
&& DW_STRING (attr
))
9090 return DW_STRING (attr
);
9091 return dwarf2_name (die
, cu
);
9094 /* Get name of a die, return NULL if not found. */
9097 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9098 struct obstack
*obstack
)
9100 if (name
&& cu
->language
== language_cplus
)
9102 char *canon_name
= cp_canonicalize_string (name
);
9104 if (canon_name
!= NULL
)
9106 if (strcmp (canon_name
, name
) != 0)
9107 name
= obsavestring (canon_name
, strlen (canon_name
),
9116 /* Get name of a die, return NULL if not found. */
9119 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9121 struct attribute
*attr
;
9123 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9124 if (!attr
|| !DW_STRING (attr
))
9129 case DW_TAG_compile_unit
:
9130 /* Compilation units have a DW_AT_name that is a filename, not
9131 a source language identifier. */
9132 case DW_TAG_enumeration_type
:
9133 case DW_TAG_enumerator
:
9134 /* These tags always have simple identifiers already; no need
9135 to canonicalize them. */
9136 return DW_STRING (attr
);
9138 if (!DW_STRING_IS_CANONICAL (attr
))
9141 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9142 &cu
->objfile
->objfile_obstack
);
9143 DW_STRING_IS_CANONICAL (attr
) = 1;
9145 return DW_STRING (attr
);
9149 /* Return the die that this die in an extension of, or NULL if there
9150 is none. *EXT_CU is the CU containing DIE on input, and the CU
9151 containing the return value on output. */
9153 static struct die_info
*
9154 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9156 struct attribute
*attr
;
9158 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9162 return follow_die_ref (die
, attr
, ext_cu
);
9165 /* Convert a DIE tag into its string name. */
9168 dwarf_tag_name (unsigned tag
)
9172 case DW_TAG_padding
:
9173 return "DW_TAG_padding";
9174 case DW_TAG_array_type
:
9175 return "DW_TAG_array_type";
9176 case DW_TAG_class_type
:
9177 return "DW_TAG_class_type";
9178 case DW_TAG_entry_point
:
9179 return "DW_TAG_entry_point";
9180 case DW_TAG_enumeration_type
:
9181 return "DW_TAG_enumeration_type";
9182 case DW_TAG_formal_parameter
:
9183 return "DW_TAG_formal_parameter";
9184 case DW_TAG_imported_declaration
:
9185 return "DW_TAG_imported_declaration";
9187 return "DW_TAG_label";
9188 case DW_TAG_lexical_block
:
9189 return "DW_TAG_lexical_block";
9191 return "DW_TAG_member";
9192 case DW_TAG_pointer_type
:
9193 return "DW_TAG_pointer_type";
9194 case DW_TAG_reference_type
:
9195 return "DW_TAG_reference_type";
9196 case DW_TAG_compile_unit
:
9197 return "DW_TAG_compile_unit";
9198 case DW_TAG_string_type
:
9199 return "DW_TAG_string_type";
9200 case DW_TAG_structure_type
:
9201 return "DW_TAG_structure_type";
9202 case DW_TAG_subroutine_type
:
9203 return "DW_TAG_subroutine_type";
9204 case DW_TAG_typedef
:
9205 return "DW_TAG_typedef";
9206 case DW_TAG_union_type
:
9207 return "DW_TAG_union_type";
9208 case DW_TAG_unspecified_parameters
:
9209 return "DW_TAG_unspecified_parameters";
9210 case DW_TAG_variant
:
9211 return "DW_TAG_variant";
9212 case DW_TAG_common_block
:
9213 return "DW_TAG_common_block";
9214 case DW_TAG_common_inclusion
:
9215 return "DW_TAG_common_inclusion";
9216 case DW_TAG_inheritance
:
9217 return "DW_TAG_inheritance";
9218 case DW_TAG_inlined_subroutine
:
9219 return "DW_TAG_inlined_subroutine";
9221 return "DW_TAG_module";
9222 case DW_TAG_ptr_to_member_type
:
9223 return "DW_TAG_ptr_to_member_type";
9224 case DW_TAG_set_type
:
9225 return "DW_TAG_set_type";
9226 case DW_TAG_subrange_type
:
9227 return "DW_TAG_subrange_type";
9228 case DW_TAG_with_stmt
:
9229 return "DW_TAG_with_stmt";
9230 case DW_TAG_access_declaration
:
9231 return "DW_TAG_access_declaration";
9232 case DW_TAG_base_type
:
9233 return "DW_TAG_base_type";
9234 case DW_TAG_catch_block
:
9235 return "DW_TAG_catch_block";
9236 case DW_TAG_const_type
:
9237 return "DW_TAG_const_type";
9238 case DW_TAG_constant
:
9239 return "DW_TAG_constant";
9240 case DW_TAG_enumerator
:
9241 return "DW_TAG_enumerator";
9242 case DW_TAG_file_type
:
9243 return "DW_TAG_file_type";
9245 return "DW_TAG_friend";
9246 case DW_TAG_namelist
:
9247 return "DW_TAG_namelist";
9248 case DW_TAG_namelist_item
:
9249 return "DW_TAG_namelist_item";
9250 case DW_TAG_packed_type
:
9251 return "DW_TAG_packed_type";
9252 case DW_TAG_subprogram
:
9253 return "DW_TAG_subprogram";
9254 case DW_TAG_template_type_param
:
9255 return "DW_TAG_template_type_param";
9256 case DW_TAG_template_value_param
:
9257 return "DW_TAG_template_value_param";
9258 case DW_TAG_thrown_type
:
9259 return "DW_TAG_thrown_type";
9260 case DW_TAG_try_block
:
9261 return "DW_TAG_try_block";
9262 case DW_TAG_variant_part
:
9263 return "DW_TAG_variant_part";
9264 case DW_TAG_variable
:
9265 return "DW_TAG_variable";
9266 case DW_TAG_volatile_type
:
9267 return "DW_TAG_volatile_type";
9268 case DW_TAG_dwarf_procedure
:
9269 return "DW_TAG_dwarf_procedure";
9270 case DW_TAG_restrict_type
:
9271 return "DW_TAG_restrict_type";
9272 case DW_TAG_interface_type
:
9273 return "DW_TAG_interface_type";
9274 case DW_TAG_namespace
:
9275 return "DW_TAG_namespace";
9276 case DW_TAG_imported_module
:
9277 return "DW_TAG_imported_module";
9278 case DW_TAG_unspecified_type
:
9279 return "DW_TAG_unspecified_type";
9280 case DW_TAG_partial_unit
:
9281 return "DW_TAG_partial_unit";
9282 case DW_TAG_imported_unit
:
9283 return "DW_TAG_imported_unit";
9284 case DW_TAG_condition
:
9285 return "DW_TAG_condition";
9286 case DW_TAG_shared_type
:
9287 return "DW_TAG_shared_type";
9288 case DW_TAG_type_unit
:
9289 return "DW_TAG_type_unit";
9290 case DW_TAG_MIPS_loop
:
9291 return "DW_TAG_MIPS_loop";
9292 case DW_TAG_HP_array_descriptor
:
9293 return "DW_TAG_HP_array_descriptor";
9294 case DW_TAG_format_label
:
9295 return "DW_TAG_format_label";
9296 case DW_TAG_function_template
:
9297 return "DW_TAG_function_template";
9298 case DW_TAG_class_template
:
9299 return "DW_TAG_class_template";
9300 case DW_TAG_GNU_BINCL
:
9301 return "DW_TAG_GNU_BINCL";
9302 case DW_TAG_GNU_EINCL
:
9303 return "DW_TAG_GNU_EINCL";
9304 case DW_TAG_upc_shared_type
:
9305 return "DW_TAG_upc_shared_type";
9306 case DW_TAG_upc_strict_type
:
9307 return "DW_TAG_upc_strict_type";
9308 case DW_TAG_upc_relaxed_type
:
9309 return "DW_TAG_upc_relaxed_type";
9310 case DW_TAG_PGI_kanji_type
:
9311 return "DW_TAG_PGI_kanji_type";
9312 case DW_TAG_PGI_interface_block
:
9313 return "DW_TAG_PGI_interface_block";
9315 return "DW_TAG_<unknown>";
9319 /* Convert a DWARF attribute code into its string name. */
9322 dwarf_attr_name (unsigned attr
)
9327 return "DW_AT_sibling";
9328 case DW_AT_location
:
9329 return "DW_AT_location";
9331 return "DW_AT_name";
9332 case DW_AT_ordering
:
9333 return "DW_AT_ordering";
9334 case DW_AT_subscr_data
:
9335 return "DW_AT_subscr_data";
9336 case DW_AT_byte_size
:
9337 return "DW_AT_byte_size";
9338 case DW_AT_bit_offset
:
9339 return "DW_AT_bit_offset";
9340 case DW_AT_bit_size
:
9341 return "DW_AT_bit_size";
9342 case DW_AT_element_list
:
9343 return "DW_AT_element_list";
9344 case DW_AT_stmt_list
:
9345 return "DW_AT_stmt_list";
9347 return "DW_AT_low_pc";
9349 return "DW_AT_high_pc";
9350 case DW_AT_language
:
9351 return "DW_AT_language";
9353 return "DW_AT_member";
9355 return "DW_AT_discr";
9356 case DW_AT_discr_value
:
9357 return "DW_AT_discr_value";
9358 case DW_AT_visibility
:
9359 return "DW_AT_visibility";
9361 return "DW_AT_import";
9362 case DW_AT_string_length
:
9363 return "DW_AT_string_length";
9364 case DW_AT_common_reference
:
9365 return "DW_AT_common_reference";
9366 case DW_AT_comp_dir
:
9367 return "DW_AT_comp_dir";
9368 case DW_AT_const_value
:
9369 return "DW_AT_const_value";
9370 case DW_AT_containing_type
:
9371 return "DW_AT_containing_type";
9372 case DW_AT_default_value
:
9373 return "DW_AT_default_value";
9375 return "DW_AT_inline";
9376 case DW_AT_is_optional
:
9377 return "DW_AT_is_optional";
9378 case DW_AT_lower_bound
:
9379 return "DW_AT_lower_bound";
9380 case DW_AT_producer
:
9381 return "DW_AT_producer";
9382 case DW_AT_prototyped
:
9383 return "DW_AT_prototyped";
9384 case DW_AT_return_addr
:
9385 return "DW_AT_return_addr";
9386 case DW_AT_start_scope
:
9387 return "DW_AT_start_scope";
9388 case DW_AT_bit_stride
:
9389 return "DW_AT_bit_stride";
9390 case DW_AT_upper_bound
:
9391 return "DW_AT_upper_bound";
9392 case DW_AT_abstract_origin
:
9393 return "DW_AT_abstract_origin";
9394 case DW_AT_accessibility
:
9395 return "DW_AT_accessibility";
9396 case DW_AT_address_class
:
9397 return "DW_AT_address_class";
9398 case DW_AT_artificial
:
9399 return "DW_AT_artificial";
9400 case DW_AT_base_types
:
9401 return "DW_AT_base_types";
9402 case DW_AT_calling_convention
:
9403 return "DW_AT_calling_convention";
9405 return "DW_AT_count";
9406 case DW_AT_data_member_location
:
9407 return "DW_AT_data_member_location";
9408 case DW_AT_decl_column
:
9409 return "DW_AT_decl_column";
9410 case DW_AT_decl_file
:
9411 return "DW_AT_decl_file";
9412 case DW_AT_decl_line
:
9413 return "DW_AT_decl_line";
9414 case DW_AT_declaration
:
9415 return "DW_AT_declaration";
9416 case DW_AT_discr_list
:
9417 return "DW_AT_discr_list";
9418 case DW_AT_encoding
:
9419 return "DW_AT_encoding";
9420 case DW_AT_external
:
9421 return "DW_AT_external";
9422 case DW_AT_frame_base
:
9423 return "DW_AT_frame_base";
9425 return "DW_AT_friend";
9426 case DW_AT_identifier_case
:
9427 return "DW_AT_identifier_case";
9428 case DW_AT_macro_info
:
9429 return "DW_AT_macro_info";
9430 case DW_AT_namelist_items
:
9431 return "DW_AT_namelist_items";
9432 case DW_AT_priority
:
9433 return "DW_AT_priority";
9435 return "DW_AT_segment";
9436 case DW_AT_specification
:
9437 return "DW_AT_specification";
9438 case DW_AT_static_link
:
9439 return "DW_AT_static_link";
9441 return "DW_AT_type";
9442 case DW_AT_use_location
:
9443 return "DW_AT_use_location";
9444 case DW_AT_variable_parameter
:
9445 return "DW_AT_variable_parameter";
9446 case DW_AT_virtuality
:
9447 return "DW_AT_virtuality";
9448 case DW_AT_vtable_elem_location
:
9449 return "DW_AT_vtable_elem_location";
9450 /* DWARF 3 values. */
9451 case DW_AT_allocated
:
9452 return "DW_AT_allocated";
9453 case DW_AT_associated
:
9454 return "DW_AT_associated";
9455 case DW_AT_data_location
:
9456 return "DW_AT_data_location";
9457 case DW_AT_byte_stride
:
9458 return "DW_AT_byte_stride";
9459 case DW_AT_entry_pc
:
9460 return "DW_AT_entry_pc";
9461 case DW_AT_use_UTF8
:
9462 return "DW_AT_use_UTF8";
9463 case DW_AT_extension
:
9464 return "DW_AT_extension";
9466 return "DW_AT_ranges";
9467 case DW_AT_trampoline
:
9468 return "DW_AT_trampoline";
9469 case DW_AT_call_column
:
9470 return "DW_AT_call_column";
9471 case DW_AT_call_file
:
9472 return "DW_AT_call_file";
9473 case DW_AT_call_line
:
9474 return "DW_AT_call_line";
9475 case DW_AT_description
:
9476 return "DW_AT_description";
9477 case DW_AT_binary_scale
:
9478 return "DW_AT_binary_scale";
9479 case DW_AT_decimal_scale
:
9480 return "DW_AT_decimal_scale";
9482 return "DW_AT_small";
9483 case DW_AT_decimal_sign
:
9484 return "DW_AT_decimal_sign";
9485 case DW_AT_digit_count
:
9486 return "DW_AT_digit_count";
9487 case DW_AT_picture_string
:
9488 return "DW_AT_picture_string";
9490 return "DW_AT_mutable";
9491 case DW_AT_threads_scaled
:
9492 return "DW_AT_threads_scaled";
9493 case DW_AT_explicit
:
9494 return "DW_AT_explicit";
9495 case DW_AT_object_pointer
:
9496 return "DW_AT_object_pointer";
9497 case DW_AT_endianity
:
9498 return "DW_AT_endianity";
9499 case DW_AT_elemental
:
9500 return "DW_AT_elemental";
9502 return "DW_AT_pure";
9503 case DW_AT_recursive
:
9504 return "DW_AT_recursive";
9505 /* DWARF 4 values. */
9506 case DW_AT_signature
:
9507 return "DW_AT_signature";
9508 /* SGI/MIPS extensions. */
9509 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9510 case DW_AT_MIPS_fde
:
9511 return "DW_AT_MIPS_fde";
9513 case DW_AT_MIPS_loop_begin
:
9514 return "DW_AT_MIPS_loop_begin";
9515 case DW_AT_MIPS_tail_loop_begin
:
9516 return "DW_AT_MIPS_tail_loop_begin";
9517 case DW_AT_MIPS_epilog_begin
:
9518 return "DW_AT_MIPS_epilog_begin";
9519 case DW_AT_MIPS_loop_unroll_factor
:
9520 return "DW_AT_MIPS_loop_unroll_factor";
9521 case DW_AT_MIPS_software_pipeline_depth
:
9522 return "DW_AT_MIPS_software_pipeline_depth";
9523 case DW_AT_MIPS_linkage_name
:
9524 return "DW_AT_MIPS_linkage_name";
9525 case DW_AT_MIPS_stride
:
9526 return "DW_AT_MIPS_stride";
9527 case DW_AT_MIPS_abstract_name
:
9528 return "DW_AT_MIPS_abstract_name";
9529 case DW_AT_MIPS_clone_origin
:
9530 return "DW_AT_MIPS_clone_origin";
9531 case DW_AT_MIPS_has_inlines
:
9532 return "DW_AT_MIPS_has_inlines";
9533 /* HP extensions. */
9534 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9535 case DW_AT_HP_block_index
:
9536 return "DW_AT_HP_block_index";
9538 case DW_AT_HP_unmodifiable
:
9539 return "DW_AT_HP_unmodifiable";
9540 case DW_AT_HP_actuals_stmt_list
:
9541 return "DW_AT_HP_actuals_stmt_list";
9542 case DW_AT_HP_proc_per_section
:
9543 return "DW_AT_HP_proc_per_section";
9544 case DW_AT_HP_raw_data_ptr
:
9545 return "DW_AT_HP_raw_data_ptr";
9546 case DW_AT_HP_pass_by_reference
:
9547 return "DW_AT_HP_pass_by_reference";
9548 case DW_AT_HP_opt_level
:
9549 return "DW_AT_HP_opt_level";
9550 case DW_AT_HP_prof_version_id
:
9551 return "DW_AT_HP_prof_version_id";
9552 case DW_AT_HP_opt_flags
:
9553 return "DW_AT_HP_opt_flags";
9554 case DW_AT_HP_cold_region_low_pc
:
9555 return "DW_AT_HP_cold_region_low_pc";
9556 case DW_AT_HP_cold_region_high_pc
:
9557 return "DW_AT_HP_cold_region_high_pc";
9558 case DW_AT_HP_all_variables_modifiable
:
9559 return "DW_AT_HP_all_variables_modifiable";
9560 case DW_AT_HP_linkage_name
:
9561 return "DW_AT_HP_linkage_name";
9562 case DW_AT_HP_prof_flags
:
9563 return "DW_AT_HP_prof_flags";
9564 /* GNU extensions. */
9565 case DW_AT_sf_names
:
9566 return "DW_AT_sf_names";
9567 case DW_AT_src_info
:
9568 return "DW_AT_src_info";
9569 case DW_AT_mac_info
:
9570 return "DW_AT_mac_info";
9571 case DW_AT_src_coords
:
9572 return "DW_AT_src_coords";
9573 case DW_AT_body_begin
:
9574 return "DW_AT_body_begin";
9575 case DW_AT_body_end
:
9576 return "DW_AT_body_end";
9577 case DW_AT_GNU_vector
:
9578 return "DW_AT_GNU_vector";
9579 /* VMS extensions. */
9580 case DW_AT_VMS_rtnbeg_pd_address
:
9581 return "DW_AT_VMS_rtnbeg_pd_address";
9582 /* UPC extension. */
9583 case DW_AT_upc_threads_scaled
:
9584 return "DW_AT_upc_threads_scaled";
9585 /* PGI (STMicroelectronics) extensions. */
9586 case DW_AT_PGI_lbase
:
9587 return "DW_AT_PGI_lbase";
9588 case DW_AT_PGI_soffset
:
9589 return "DW_AT_PGI_soffset";
9590 case DW_AT_PGI_lstride
:
9591 return "DW_AT_PGI_lstride";
9593 return "DW_AT_<unknown>";
9597 /* Convert a DWARF value form code into its string name. */
9600 dwarf_form_name (unsigned form
)
9605 return "DW_FORM_addr";
9606 case DW_FORM_block2
:
9607 return "DW_FORM_block2";
9608 case DW_FORM_block4
:
9609 return "DW_FORM_block4";
9611 return "DW_FORM_data2";
9613 return "DW_FORM_data4";
9615 return "DW_FORM_data8";
9616 case DW_FORM_string
:
9617 return "DW_FORM_string";
9619 return "DW_FORM_block";
9620 case DW_FORM_block1
:
9621 return "DW_FORM_block1";
9623 return "DW_FORM_data1";
9625 return "DW_FORM_flag";
9627 return "DW_FORM_sdata";
9629 return "DW_FORM_strp";
9631 return "DW_FORM_udata";
9632 case DW_FORM_ref_addr
:
9633 return "DW_FORM_ref_addr";
9635 return "DW_FORM_ref1";
9637 return "DW_FORM_ref2";
9639 return "DW_FORM_ref4";
9641 return "DW_FORM_ref8";
9642 case DW_FORM_ref_udata
:
9643 return "DW_FORM_ref_udata";
9644 case DW_FORM_indirect
:
9645 return "DW_FORM_indirect";
9646 case DW_FORM_sec_offset
:
9647 return "DW_FORM_sec_offset";
9648 case DW_FORM_exprloc
:
9649 return "DW_FORM_exprloc";
9650 case DW_FORM_flag_present
:
9651 return "DW_FORM_flag_present";
9653 return "DW_FORM_sig8";
9655 return "DW_FORM_<unknown>";
9659 /* Convert a DWARF stack opcode into its string name. */
9662 dwarf_stack_op_name (unsigned op
)
9667 return "DW_OP_addr";
9669 return "DW_OP_deref";
9671 return "DW_OP_const1u";
9673 return "DW_OP_const1s";
9675 return "DW_OP_const2u";
9677 return "DW_OP_const2s";
9679 return "DW_OP_const4u";
9681 return "DW_OP_const4s";
9683 return "DW_OP_const8u";
9685 return "DW_OP_const8s";
9687 return "DW_OP_constu";
9689 return "DW_OP_consts";
9693 return "DW_OP_drop";
9695 return "DW_OP_over";
9697 return "DW_OP_pick";
9699 return "DW_OP_swap";
9703 return "DW_OP_xderef";
9711 return "DW_OP_minus";
9723 return "DW_OP_plus";
9724 case DW_OP_plus_uconst
:
9725 return "DW_OP_plus_uconst";
9731 return "DW_OP_shra";
9749 return "DW_OP_skip";
9751 return "DW_OP_lit0";
9753 return "DW_OP_lit1";
9755 return "DW_OP_lit2";
9757 return "DW_OP_lit3";
9759 return "DW_OP_lit4";
9761 return "DW_OP_lit5";
9763 return "DW_OP_lit6";
9765 return "DW_OP_lit7";
9767 return "DW_OP_lit8";
9769 return "DW_OP_lit9";
9771 return "DW_OP_lit10";
9773 return "DW_OP_lit11";
9775 return "DW_OP_lit12";
9777 return "DW_OP_lit13";
9779 return "DW_OP_lit14";
9781 return "DW_OP_lit15";
9783 return "DW_OP_lit16";
9785 return "DW_OP_lit17";
9787 return "DW_OP_lit18";
9789 return "DW_OP_lit19";
9791 return "DW_OP_lit20";
9793 return "DW_OP_lit21";
9795 return "DW_OP_lit22";
9797 return "DW_OP_lit23";
9799 return "DW_OP_lit24";
9801 return "DW_OP_lit25";
9803 return "DW_OP_lit26";
9805 return "DW_OP_lit27";
9807 return "DW_OP_lit28";
9809 return "DW_OP_lit29";
9811 return "DW_OP_lit30";
9813 return "DW_OP_lit31";
9815 return "DW_OP_reg0";
9817 return "DW_OP_reg1";
9819 return "DW_OP_reg2";
9821 return "DW_OP_reg3";
9823 return "DW_OP_reg4";
9825 return "DW_OP_reg5";
9827 return "DW_OP_reg6";
9829 return "DW_OP_reg7";
9831 return "DW_OP_reg8";
9833 return "DW_OP_reg9";
9835 return "DW_OP_reg10";
9837 return "DW_OP_reg11";
9839 return "DW_OP_reg12";
9841 return "DW_OP_reg13";
9843 return "DW_OP_reg14";
9845 return "DW_OP_reg15";
9847 return "DW_OP_reg16";
9849 return "DW_OP_reg17";
9851 return "DW_OP_reg18";
9853 return "DW_OP_reg19";
9855 return "DW_OP_reg20";
9857 return "DW_OP_reg21";
9859 return "DW_OP_reg22";
9861 return "DW_OP_reg23";
9863 return "DW_OP_reg24";
9865 return "DW_OP_reg25";
9867 return "DW_OP_reg26";
9869 return "DW_OP_reg27";
9871 return "DW_OP_reg28";
9873 return "DW_OP_reg29";
9875 return "DW_OP_reg30";
9877 return "DW_OP_reg31";
9879 return "DW_OP_breg0";
9881 return "DW_OP_breg1";
9883 return "DW_OP_breg2";
9885 return "DW_OP_breg3";
9887 return "DW_OP_breg4";
9889 return "DW_OP_breg5";
9891 return "DW_OP_breg6";
9893 return "DW_OP_breg7";
9895 return "DW_OP_breg8";
9897 return "DW_OP_breg9";
9899 return "DW_OP_breg10";
9901 return "DW_OP_breg11";
9903 return "DW_OP_breg12";
9905 return "DW_OP_breg13";
9907 return "DW_OP_breg14";
9909 return "DW_OP_breg15";
9911 return "DW_OP_breg16";
9913 return "DW_OP_breg17";
9915 return "DW_OP_breg18";
9917 return "DW_OP_breg19";
9919 return "DW_OP_breg20";
9921 return "DW_OP_breg21";
9923 return "DW_OP_breg22";
9925 return "DW_OP_breg23";
9927 return "DW_OP_breg24";
9929 return "DW_OP_breg25";
9931 return "DW_OP_breg26";
9933 return "DW_OP_breg27";
9935 return "DW_OP_breg28";
9937 return "DW_OP_breg29";
9939 return "DW_OP_breg30";
9941 return "DW_OP_breg31";
9943 return "DW_OP_regx";
9945 return "DW_OP_fbreg";
9947 return "DW_OP_bregx";
9949 return "DW_OP_piece";
9950 case DW_OP_deref_size
:
9951 return "DW_OP_deref_size";
9952 case DW_OP_xderef_size
:
9953 return "DW_OP_xderef_size";
9956 /* DWARF 3 extensions. */
9957 case DW_OP_push_object_address
:
9958 return "DW_OP_push_object_address";
9960 return "DW_OP_call2";
9962 return "DW_OP_call4";
9963 case DW_OP_call_ref
:
9964 return "DW_OP_call_ref";
9965 /* GNU extensions. */
9966 case DW_OP_form_tls_address
:
9967 return "DW_OP_form_tls_address";
9968 case DW_OP_call_frame_cfa
:
9969 return "DW_OP_call_frame_cfa";
9970 case DW_OP_bit_piece
:
9971 return "DW_OP_bit_piece";
9972 case DW_OP_GNU_push_tls_address
:
9973 return "DW_OP_GNU_push_tls_address";
9974 case DW_OP_GNU_uninit
:
9975 return "DW_OP_GNU_uninit";
9976 /* HP extensions. */
9977 case DW_OP_HP_is_value
:
9978 return "DW_OP_HP_is_value";
9979 case DW_OP_HP_fltconst4
:
9980 return "DW_OP_HP_fltconst4";
9981 case DW_OP_HP_fltconst8
:
9982 return "DW_OP_HP_fltconst8";
9983 case DW_OP_HP_mod_range
:
9984 return "DW_OP_HP_mod_range";
9985 case DW_OP_HP_unmod_range
:
9986 return "DW_OP_HP_unmod_range";
9988 return "DW_OP_HP_tls";
9990 return "OP_<unknown>";
9995 dwarf_bool_name (unsigned mybool
)
10003 /* Convert a DWARF type code into its string name. */
10006 dwarf_type_encoding_name (unsigned enc
)
10011 return "DW_ATE_void";
10012 case DW_ATE_address
:
10013 return "DW_ATE_address";
10014 case DW_ATE_boolean
:
10015 return "DW_ATE_boolean";
10016 case DW_ATE_complex_float
:
10017 return "DW_ATE_complex_float";
10019 return "DW_ATE_float";
10020 case DW_ATE_signed
:
10021 return "DW_ATE_signed";
10022 case DW_ATE_signed_char
:
10023 return "DW_ATE_signed_char";
10024 case DW_ATE_unsigned
:
10025 return "DW_ATE_unsigned";
10026 case DW_ATE_unsigned_char
:
10027 return "DW_ATE_unsigned_char";
10029 case DW_ATE_imaginary_float
:
10030 return "DW_ATE_imaginary_float";
10031 case DW_ATE_packed_decimal
:
10032 return "DW_ATE_packed_decimal";
10033 case DW_ATE_numeric_string
:
10034 return "DW_ATE_numeric_string";
10035 case DW_ATE_edited
:
10036 return "DW_ATE_edited";
10037 case DW_ATE_signed_fixed
:
10038 return "DW_ATE_signed_fixed";
10039 case DW_ATE_unsigned_fixed
:
10040 return "DW_ATE_unsigned_fixed";
10041 case DW_ATE_decimal_float
:
10042 return "DW_ATE_decimal_float";
10043 /* HP extensions. */
10044 case DW_ATE_HP_float80
:
10045 return "DW_ATE_HP_float80";
10046 case DW_ATE_HP_complex_float80
:
10047 return "DW_ATE_HP_complex_float80";
10048 case DW_ATE_HP_float128
:
10049 return "DW_ATE_HP_float128";
10050 case DW_ATE_HP_complex_float128
:
10051 return "DW_ATE_HP_complex_float128";
10052 case DW_ATE_HP_floathpintel
:
10053 return "DW_ATE_HP_floathpintel";
10054 case DW_ATE_HP_imaginary_float80
:
10055 return "DW_ATE_HP_imaginary_float80";
10056 case DW_ATE_HP_imaginary_float128
:
10057 return "DW_ATE_HP_imaginary_float128";
10059 return "DW_ATE_<unknown>";
10063 /* Convert a DWARF call frame info operation to its string name. */
10067 dwarf_cfi_name (unsigned cfi_opc
)
10071 case DW_CFA_advance_loc
:
10072 return "DW_CFA_advance_loc";
10073 case DW_CFA_offset
:
10074 return "DW_CFA_offset";
10075 case DW_CFA_restore
:
10076 return "DW_CFA_restore";
10078 return "DW_CFA_nop";
10079 case DW_CFA_set_loc
:
10080 return "DW_CFA_set_loc";
10081 case DW_CFA_advance_loc1
:
10082 return "DW_CFA_advance_loc1";
10083 case DW_CFA_advance_loc2
:
10084 return "DW_CFA_advance_loc2";
10085 case DW_CFA_advance_loc4
:
10086 return "DW_CFA_advance_loc4";
10087 case DW_CFA_offset_extended
:
10088 return "DW_CFA_offset_extended";
10089 case DW_CFA_restore_extended
:
10090 return "DW_CFA_restore_extended";
10091 case DW_CFA_undefined
:
10092 return "DW_CFA_undefined";
10093 case DW_CFA_same_value
:
10094 return "DW_CFA_same_value";
10095 case DW_CFA_register
:
10096 return "DW_CFA_register";
10097 case DW_CFA_remember_state
:
10098 return "DW_CFA_remember_state";
10099 case DW_CFA_restore_state
:
10100 return "DW_CFA_restore_state";
10101 case DW_CFA_def_cfa
:
10102 return "DW_CFA_def_cfa";
10103 case DW_CFA_def_cfa_register
:
10104 return "DW_CFA_def_cfa_register";
10105 case DW_CFA_def_cfa_offset
:
10106 return "DW_CFA_def_cfa_offset";
10108 case DW_CFA_def_cfa_expression
:
10109 return "DW_CFA_def_cfa_expression";
10110 case DW_CFA_expression
:
10111 return "DW_CFA_expression";
10112 case DW_CFA_offset_extended_sf
:
10113 return "DW_CFA_offset_extended_sf";
10114 case DW_CFA_def_cfa_sf
:
10115 return "DW_CFA_def_cfa_sf";
10116 case DW_CFA_def_cfa_offset_sf
:
10117 return "DW_CFA_def_cfa_offset_sf";
10118 case DW_CFA_val_offset
:
10119 return "DW_CFA_val_offset";
10120 case DW_CFA_val_offset_sf
:
10121 return "DW_CFA_val_offset_sf";
10122 case DW_CFA_val_expression
:
10123 return "DW_CFA_val_expression";
10124 /* SGI/MIPS specific. */
10125 case DW_CFA_MIPS_advance_loc8
:
10126 return "DW_CFA_MIPS_advance_loc8";
10127 /* GNU extensions. */
10128 case DW_CFA_GNU_window_save
:
10129 return "DW_CFA_GNU_window_save";
10130 case DW_CFA_GNU_args_size
:
10131 return "DW_CFA_GNU_args_size";
10132 case DW_CFA_GNU_negative_offset_extended
:
10133 return "DW_CFA_GNU_negative_offset_extended";
10135 return "DW_CFA_<unknown>";
10141 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10145 print_spaces (indent
, f
);
10146 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10147 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10149 if (die
->parent
!= NULL
)
10151 print_spaces (indent
, f
);
10152 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10153 die
->parent
->offset
);
10156 print_spaces (indent
, f
);
10157 fprintf_unfiltered (f
, " has children: %s\n",
10158 dwarf_bool_name (die
->child
!= NULL
));
10160 print_spaces (indent
, f
);
10161 fprintf_unfiltered (f
, " attributes:\n");
10163 for (i
= 0; i
< die
->num_attrs
; ++i
)
10165 print_spaces (indent
, f
);
10166 fprintf_unfiltered (f
, " %s (%s) ",
10167 dwarf_attr_name (die
->attrs
[i
].name
),
10168 dwarf_form_name (die
->attrs
[i
].form
));
10170 switch (die
->attrs
[i
].form
)
10172 case DW_FORM_ref_addr
:
10174 fprintf_unfiltered (f
, "address: ");
10175 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10177 case DW_FORM_block2
:
10178 case DW_FORM_block4
:
10179 case DW_FORM_block
:
10180 case DW_FORM_block1
:
10181 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10186 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10187 (long) (DW_ADDR (&die
->attrs
[i
])));
10189 case DW_FORM_data1
:
10190 case DW_FORM_data2
:
10191 case DW_FORM_data4
:
10192 case DW_FORM_data8
:
10193 case DW_FORM_udata
:
10194 case DW_FORM_sdata
:
10195 fprintf_unfiltered (f
, "constant: %s",
10196 pulongest (DW_UNSND (&die
->attrs
[i
])));
10199 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10200 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10201 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10203 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10205 case DW_FORM_string
:
10207 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10208 DW_STRING (&die
->attrs
[i
])
10209 ? DW_STRING (&die
->attrs
[i
]) : "",
10210 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10213 if (DW_UNSND (&die
->attrs
[i
]))
10214 fprintf_unfiltered (f
, "flag: TRUE");
10216 fprintf_unfiltered (f
, "flag: FALSE");
10218 case DW_FORM_indirect
:
10219 /* the reader will have reduced the indirect form to
10220 the "base form" so this form should not occur */
10221 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10224 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10225 die
->attrs
[i
].form
);
10228 fprintf_unfiltered (f
, "\n");
10233 dump_die_for_error (struct die_info
*die
)
10235 dump_die_shallow (gdb_stderr
, 0, die
);
10239 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10241 int indent
= level
* 4;
10243 gdb_assert (die
!= NULL
);
10245 if (level
>= max_level
)
10248 dump_die_shallow (f
, indent
, die
);
10250 if (die
->child
!= NULL
)
10252 print_spaces (indent
, f
);
10253 fprintf_unfiltered (f
, " Children:");
10254 if (level
+ 1 < max_level
)
10256 fprintf_unfiltered (f
, "\n");
10257 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10261 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10265 if (die
->sibling
!= NULL
&& level
> 0)
10267 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10271 /* This is called from the pdie macro in gdbinit.in.
10272 It's not static so gcc will keep a copy callable from gdb. */
10275 dump_die (struct die_info
*die
, int max_level
)
10277 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10281 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10285 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10291 is_ref_attr (struct attribute
*attr
)
10293 switch (attr
->form
)
10295 case DW_FORM_ref_addr
:
10300 case DW_FORM_ref_udata
:
10307 static unsigned int
10308 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10310 if (is_ref_attr (attr
))
10311 return DW_ADDR (attr
);
10313 complaint (&symfile_complaints
,
10314 _("unsupported die ref attribute form: '%s'"),
10315 dwarf_form_name (attr
->form
));
10319 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10320 * the value held by the attribute is not constant. */
10323 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10325 if (attr
->form
== DW_FORM_sdata
)
10326 return DW_SND (attr
);
10327 else if (attr
->form
== DW_FORM_udata
10328 || attr
->form
== DW_FORM_data1
10329 || attr
->form
== DW_FORM_data2
10330 || attr
->form
== DW_FORM_data4
10331 || attr
->form
== DW_FORM_data8
)
10332 return DW_UNSND (attr
);
10335 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10336 dwarf_form_name (attr
->form
));
10337 return default_value
;
10341 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10342 unit and add it to our queue.
10343 The result is non-zero if PER_CU was queued, otherwise the result is zero
10344 meaning either PER_CU is already queued or it is already loaded. */
10347 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10348 struct dwarf2_per_cu_data
*per_cu
)
10350 /* Mark the dependence relation so that we don't flush PER_CU
10352 dwarf2_add_dependence (this_cu
, per_cu
);
10354 /* If it's already on the queue, we have nothing to do. */
10355 if (per_cu
->queued
)
10358 /* If the compilation unit is already loaded, just mark it as
10360 if (per_cu
->cu
!= NULL
)
10362 per_cu
->cu
->last_used
= 0;
10366 /* Add it to the queue. */
10367 queue_comp_unit (per_cu
, this_cu
->objfile
);
10372 /* Follow reference or signature attribute ATTR of SRC_DIE.
10373 On entry *REF_CU is the CU of SRC_DIE.
10374 On exit *REF_CU is the CU of the result. */
10376 static struct die_info
*
10377 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10378 struct dwarf2_cu
**ref_cu
)
10380 struct die_info
*die
;
10382 if (is_ref_attr (attr
))
10383 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10384 else if (attr
->form
== DW_FORM_sig8
)
10385 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10388 dump_die_for_error (src_die
);
10389 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10390 (*ref_cu
)->objfile
->name
);
10396 /* Follow reference attribute ATTR of SRC_DIE.
10397 On entry *REF_CU is the CU of SRC_DIE.
10398 On exit *REF_CU is the CU of the result. */
10400 static struct die_info
*
10401 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10402 struct dwarf2_cu
**ref_cu
)
10404 struct die_info
*die
;
10405 unsigned int offset
;
10406 struct die_info temp_die
;
10407 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10409 gdb_assert (cu
->per_cu
!= NULL
);
10411 offset
= dwarf2_get_ref_die_offset (attr
);
10413 if (cu
->per_cu
->from_debug_types
)
10415 /* .debug_types CUs cannot reference anything outside their CU.
10416 If they need to, they have to reference a signatured type via
10418 if (! offset_in_cu_p (&cu
->header
, offset
))
10422 else if (! offset_in_cu_p (&cu
->header
, offset
))
10424 struct dwarf2_per_cu_data
*per_cu
;
10425 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10427 /* If necessary, add it to the queue and load its DIEs. */
10428 if (maybe_queue_comp_unit (cu
, per_cu
))
10429 load_full_comp_unit (per_cu
, cu
->objfile
);
10431 target_cu
= per_cu
->cu
;
10436 *ref_cu
= target_cu
;
10437 temp_die
.offset
= offset
;
10438 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10444 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10445 "at 0x%x [in module %s]"),
10446 offset
, src_die
->offset
, cu
->objfile
->name
);
10449 /* Follow the signature attribute ATTR in SRC_DIE.
10450 On entry *REF_CU is the CU of SRC_DIE.
10451 On exit *REF_CU is the CU of the result. */
10453 static struct die_info
*
10454 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10455 struct dwarf2_cu
**ref_cu
)
10457 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10458 struct die_info temp_die
;
10459 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10460 struct dwarf2_cu
*sig_cu
;
10461 struct die_info
*die
;
10463 /* sig_type will be NULL if the signatured type is missing from
10465 if (sig_type
== NULL
)
10466 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10467 "at 0x%x [in module %s]"),
10468 src_die
->offset
, objfile
->name
);
10470 /* If necessary, add it to the queue and load its DIEs. */
10472 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10473 read_signatured_type (objfile
, sig_type
);
10475 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10477 sig_cu
= sig_type
->per_cu
.cu
;
10478 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10479 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10486 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10487 "at 0x%x [in module %s]"),
10488 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10491 /* Given an offset of a signatured type, return its signatured_type. */
10493 static struct signatured_type
*
10494 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10496 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10497 unsigned int length
, initial_length_size
;
10498 unsigned int sig_offset
;
10499 struct signatured_type find_entry
, *type_sig
;
10501 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10502 sig_offset
= (initial_length_size
10504 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10505 + 1 /*address_size*/);
10506 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10507 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10509 /* This is only used to lookup previously recorded types.
10510 If we didn't find it, it's our bug. */
10511 gdb_assert (type_sig
!= NULL
);
10512 gdb_assert (offset
== type_sig
->offset
);
10517 /* Read in signatured type at OFFSET and build its CU and die(s). */
10520 read_signatured_type_at_offset (struct objfile
*objfile
,
10521 unsigned int offset
)
10523 struct signatured_type
*type_sig
;
10525 /* We have the section offset, but we need the signature to do the
10526 hash table lookup. */
10527 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10529 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10531 read_signatured_type (objfile
, type_sig
);
10533 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10536 /* Read in a signatured type and build its CU and DIEs. */
10539 read_signatured_type (struct objfile
*objfile
,
10540 struct signatured_type
*type_sig
)
10542 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10543 struct die_reader_specs reader_specs
;
10544 struct dwarf2_cu
*cu
;
10545 ULONGEST signature
;
10546 struct cleanup
*back_to
, *free_cu_cleanup
;
10547 struct attribute
*attr
;
10549 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10551 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10552 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10553 obstack_init (&cu
->comp_unit_obstack
);
10554 cu
->objfile
= objfile
;
10555 type_sig
->per_cu
.cu
= cu
;
10556 cu
->per_cu
= &type_sig
->per_cu
;
10558 /* If an error occurs while loading, release our storage. */
10559 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10561 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10562 types_ptr
, objfile
->obfd
);
10563 gdb_assert (signature
== type_sig
->signature
);
10566 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10570 &cu
->comp_unit_obstack
,
10571 hashtab_obstack_allocate
,
10572 dummy_obstack_deallocate
);
10574 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10575 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10577 init_cu_die_reader (&reader_specs
, cu
);
10579 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10582 /* We try not to read any attributes in this function, because not
10583 all objfiles needed for references have been loaded yet, and symbol
10584 table processing isn't initialized. But we have to set the CU language,
10585 or we won't be able to build types correctly. */
10586 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10588 set_cu_language (DW_UNSND (attr
), cu
);
10590 set_cu_language (language_minimal
, cu
);
10592 do_cleanups (back_to
);
10594 /* We've successfully allocated this compilation unit. Let our caller
10595 clean it up when finished with it. */
10596 discard_cleanups (free_cu_cleanup
);
10598 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10599 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10602 /* Decode simple location descriptions.
10603 Given a pointer to a dwarf block that defines a location, compute
10604 the location and return the value.
10606 NOTE drow/2003-11-18: This function is called in two situations
10607 now: for the address of static or global variables (partial symbols
10608 only) and for offsets into structures which are expected to be
10609 (more or less) constant. The partial symbol case should go away,
10610 and only the constant case should remain. That will let this
10611 function complain more accurately. A few special modes are allowed
10612 without complaint for global variables (for instance, global
10613 register values and thread-local values).
10615 A location description containing no operations indicates that the
10616 object is optimized out. The return value is 0 for that case.
10617 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10618 callers will only want a very basic result and this can become a
10621 Note that stack[0] is unused except as a default error return.
10622 Note that stack overflow is not yet handled. */
10625 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10627 struct objfile
*objfile
= cu
->objfile
;
10628 struct comp_unit_head
*cu_header
= &cu
->header
;
10630 int size
= blk
->size
;
10631 gdb_byte
*data
= blk
->data
;
10632 CORE_ADDR stack
[64];
10634 unsigned int bytes_read
, unsnd
;
10678 stack
[++stacki
] = op
- DW_OP_lit0
;
10713 stack
[++stacki
] = op
- DW_OP_reg0
;
10715 dwarf2_complex_location_expr_complaint ();
10719 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10721 stack
[++stacki
] = unsnd
;
10723 dwarf2_complex_location_expr_complaint ();
10727 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10732 case DW_OP_const1u
:
10733 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10737 case DW_OP_const1s
:
10738 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10742 case DW_OP_const2u
:
10743 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10747 case DW_OP_const2s
:
10748 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10752 case DW_OP_const4u
:
10753 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10757 case DW_OP_const4s
:
10758 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10763 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10769 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10774 stack
[stacki
+ 1] = stack
[stacki
];
10779 stack
[stacki
- 1] += stack
[stacki
];
10783 case DW_OP_plus_uconst
:
10784 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10789 stack
[stacki
- 1] -= stack
[stacki
];
10794 /* If we're not the last op, then we definitely can't encode
10795 this using GDB's address_class enum. This is valid for partial
10796 global symbols, although the variable's address will be bogus
10799 dwarf2_complex_location_expr_complaint ();
10802 case DW_OP_GNU_push_tls_address
:
10803 /* The top of the stack has the offset from the beginning
10804 of the thread control block at which the variable is located. */
10805 /* Nothing should follow this operator, so the top of stack would
10807 /* This is valid for partial global symbols, but the variable's
10808 address will be bogus in the psymtab. */
10810 dwarf2_complex_location_expr_complaint ();
10813 case DW_OP_GNU_uninit
:
10817 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10818 dwarf_stack_op_name (op
));
10819 return (stack
[stacki
]);
10822 return (stack
[stacki
]);
10825 /* memory allocation interface */
10827 static struct dwarf_block
*
10828 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10830 struct dwarf_block
*blk
;
10832 blk
= (struct dwarf_block
*)
10833 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10837 static struct abbrev_info
*
10838 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10840 struct abbrev_info
*abbrev
;
10842 abbrev
= (struct abbrev_info
*)
10843 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10844 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10848 static struct die_info
*
10849 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10851 struct die_info
*die
;
10852 size_t size
= sizeof (struct die_info
);
10855 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10857 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10858 memset (die
, 0, sizeof (struct die_info
));
10863 /* Macro support. */
10866 /* Return the full name of file number I in *LH's file name table.
10867 Use COMP_DIR as the name of the current directory of the
10868 compilation. The result is allocated using xmalloc; the caller is
10869 responsible for freeing it. */
10871 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10873 /* Is the file number a valid index into the line header's file name
10874 table? Remember that file numbers start with one, not zero. */
10875 if (1 <= file
&& file
<= lh
->num_file_names
)
10877 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10879 if (IS_ABSOLUTE_PATH (fe
->name
))
10880 return xstrdup (fe
->name
);
10888 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10894 dir_len
= strlen (dir
);
10895 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10896 strcpy (full_name
, dir
);
10897 full_name
[dir_len
] = '/';
10898 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10902 return xstrdup (fe
->name
);
10907 /* The compiler produced a bogus file number. We can at least
10908 record the macro definitions made in the file, even if we
10909 won't be able to find the file by name. */
10910 char fake_name
[80];
10911 sprintf (fake_name
, "<bad macro file number %d>", file
);
10913 complaint (&symfile_complaints
,
10914 _("bad file number in macro information (%d)"),
10917 return xstrdup (fake_name
);
10922 static struct macro_source_file
*
10923 macro_start_file (int file
, int line
,
10924 struct macro_source_file
*current_file
,
10925 const char *comp_dir
,
10926 struct line_header
*lh
, struct objfile
*objfile
)
10928 /* The full name of this source file. */
10929 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10931 /* We don't create a macro table for this compilation unit
10932 at all until we actually get a filename. */
10933 if (! pending_macros
)
10934 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10935 objfile
->macro_cache
);
10937 if (! current_file
)
10938 /* If we have no current file, then this must be the start_file
10939 directive for the compilation unit's main source file. */
10940 current_file
= macro_set_main (pending_macros
, full_name
);
10942 current_file
= macro_include (current_file
, line
, full_name
);
10946 return current_file
;
10950 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10951 followed by a null byte. */
10953 copy_string (const char *buf
, int len
)
10955 char *s
= xmalloc (len
+ 1);
10956 memcpy (s
, buf
, len
);
10963 static const char *
10964 consume_improper_spaces (const char *p
, const char *body
)
10968 complaint (&symfile_complaints
,
10969 _("macro definition contains spaces in formal argument list:\n`%s'"),
10981 parse_macro_definition (struct macro_source_file
*file
, int line
,
10986 /* The body string takes one of two forms. For object-like macro
10987 definitions, it should be:
10989 <macro name> " " <definition>
10991 For function-like macro definitions, it should be:
10993 <macro name> "() " <definition>
10995 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10997 Spaces may appear only where explicitly indicated, and in the
11000 The Dwarf 2 spec says that an object-like macro's name is always
11001 followed by a space, but versions of GCC around March 2002 omit
11002 the space when the macro's definition is the empty string.
11004 The Dwarf 2 spec says that there should be no spaces between the
11005 formal arguments in a function-like macro's formal argument list,
11006 but versions of GCC around March 2002 include spaces after the
11010 /* Find the extent of the macro name. The macro name is terminated
11011 by either a space or null character (for an object-like macro) or
11012 an opening paren (for a function-like macro). */
11013 for (p
= body
; *p
; p
++)
11014 if (*p
== ' ' || *p
== '(')
11017 if (*p
== ' ' || *p
== '\0')
11019 /* It's an object-like macro. */
11020 int name_len
= p
- body
;
11021 char *name
= copy_string (body
, name_len
);
11022 const char *replacement
;
11025 replacement
= body
+ name_len
+ 1;
11028 dwarf2_macro_malformed_definition_complaint (body
);
11029 replacement
= body
+ name_len
;
11032 macro_define_object (file
, line
, name
, replacement
);
11036 else if (*p
== '(')
11038 /* It's a function-like macro. */
11039 char *name
= copy_string (body
, p
- body
);
11042 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11046 p
= consume_improper_spaces (p
, body
);
11048 /* Parse the formal argument list. */
11049 while (*p
&& *p
!= ')')
11051 /* Find the extent of the current argument name. */
11052 const char *arg_start
= p
;
11054 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11057 if (! *p
|| p
== arg_start
)
11058 dwarf2_macro_malformed_definition_complaint (body
);
11061 /* Make sure argv has room for the new argument. */
11062 if (argc
>= argv_size
)
11065 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11068 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11071 p
= consume_improper_spaces (p
, body
);
11073 /* Consume the comma, if present. */
11078 p
= consume_improper_spaces (p
, body
);
11087 /* Perfectly formed definition, no complaints. */
11088 macro_define_function (file
, line
, name
,
11089 argc
, (const char **) argv
,
11091 else if (*p
== '\0')
11093 /* Complain, but do define it. */
11094 dwarf2_macro_malformed_definition_complaint (body
);
11095 macro_define_function (file
, line
, name
,
11096 argc
, (const char **) argv
,
11100 /* Just complain. */
11101 dwarf2_macro_malformed_definition_complaint (body
);
11104 /* Just complain. */
11105 dwarf2_macro_malformed_definition_complaint (body
);
11111 for (i
= 0; i
< argc
; i
++)
11117 dwarf2_macro_malformed_definition_complaint (body
);
11122 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11123 char *comp_dir
, bfd
*abfd
,
11124 struct dwarf2_cu
*cu
)
11126 gdb_byte
*mac_ptr
, *mac_end
;
11127 struct macro_source_file
*current_file
= 0;
11128 enum dwarf_macinfo_record_type macinfo_type
;
11129 int at_commandline
;
11131 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11133 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11137 /* First pass: Find the name of the base filename.
11138 This filename is needed in order to process all macros whose definition
11139 (or undefinition) comes from the command line. These macros are defined
11140 before the first DW_MACINFO_start_file entry, and yet still need to be
11141 associated to the base file.
11143 To determine the base file name, we scan the macro definitions until we
11144 reach the first DW_MACINFO_start_file entry. We then initialize
11145 CURRENT_FILE accordingly so that any macro definition found before the
11146 first DW_MACINFO_start_file can still be associated to the base file. */
11148 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11149 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11150 + dwarf2_per_objfile
->macinfo
.size
;
11154 /* Do we at least have room for a macinfo type byte? */
11155 if (mac_ptr
>= mac_end
)
11157 /* Complaint is printed during the second pass as GDB will probably
11158 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11162 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11165 switch (macinfo_type
)
11167 /* A zero macinfo type indicates the end of the macro
11172 case DW_MACINFO_define
:
11173 case DW_MACINFO_undef
:
11174 /* Only skip the data by MAC_PTR. */
11176 unsigned int bytes_read
;
11178 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11179 mac_ptr
+= bytes_read
;
11180 read_string (abfd
, mac_ptr
, &bytes_read
);
11181 mac_ptr
+= bytes_read
;
11185 case DW_MACINFO_start_file
:
11187 unsigned int bytes_read
;
11190 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11191 mac_ptr
+= bytes_read
;
11192 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11193 mac_ptr
+= bytes_read
;
11195 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11200 case DW_MACINFO_end_file
:
11201 /* No data to skip by MAC_PTR. */
11204 case DW_MACINFO_vendor_ext
:
11205 /* Only skip the data by MAC_PTR. */
11207 unsigned int bytes_read
;
11209 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11210 mac_ptr
+= bytes_read
;
11211 read_string (abfd
, mac_ptr
, &bytes_read
);
11212 mac_ptr
+= bytes_read
;
11219 } while (macinfo_type
!= 0 && current_file
== NULL
);
11221 /* Second pass: Process all entries.
11223 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11224 command-line macro definitions/undefinitions. This flag is unset when we
11225 reach the first DW_MACINFO_start_file entry. */
11227 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11229 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11230 GDB is still reading the definitions from command line. First
11231 DW_MACINFO_start_file will need to be ignored as it was already executed
11232 to create CURRENT_FILE for the main source holding also the command line
11233 definitions. On first met DW_MACINFO_start_file this flag is reset to
11234 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11236 at_commandline
= 1;
11240 /* Do we at least have room for a macinfo type byte? */
11241 if (mac_ptr
>= mac_end
)
11243 dwarf2_macros_too_long_complaint ();
11247 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11250 switch (macinfo_type
)
11252 /* A zero macinfo type indicates the end of the macro
11257 case DW_MACINFO_define
:
11258 case DW_MACINFO_undef
:
11260 unsigned int bytes_read
;
11264 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11265 mac_ptr
+= bytes_read
;
11266 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11267 mac_ptr
+= bytes_read
;
11269 if (! current_file
)
11271 /* DWARF violation as no main source is present. */
11272 complaint (&symfile_complaints
,
11273 _("debug info with no main source gives macro %s "
11275 macinfo_type
== DW_MACINFO_define
?
11277 macinfo_type
== DW_MACINFO_undef
?
11278 _("undefinition") :
11279 _("something-or-other"), line
, body
);
11282 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11283 complaint (&symfile_complaints
,
11284 _("debug info gives %s macro %s with %s line %d: %s"),
11285 at_commandline
? _("command-line") : _("in-file"),
11286 macinfo_type
== DW_MACINFO_define
?
11288 macinfo_type
== DW_MACINFO_undef
?
11289 _("undefinition") :
11290 _("something-or-other"),
11291 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11293 if (macinfo_type
== DW_MACINFO_define
)
11294 parse_macro_definition (current_file
, line
, body
);
11295 else if (macinfo_type
== DW_MACINFO_undef
)
11296 macro_undef (current_file
, line
, body
);
11300 case DW_MACINFO_start_file
:
11302 unsigned int bytes_read
;
11305 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11306 mac_ptr
+= bytes_read
;
11307 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11308 mac_ptr
+= bytes_read
;
11310 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11311 complaint (&symfile_complaints
,
11312 _("debug info gives source %d included "
11313 "from %s at %s line %d"),
11314 file
, at_commandline
? _("command-line") : _("file"),
11315 line
== 0 ? _("zero") : _("non-zero"), line
);
11317 if (at_commandline
)
11319 /* This DW_MACINFO_start_file was executed in the pass one. */
11320 at_commandline
= 0;
11323 current_file
= macro_start_file (file
, line
,
11324 current_file
, comp_dir
,
11329 case DW_MACINFO_end_file
:
11330 if (! current_file
)
11331 complaint (&symfile_complaints
,
11332 _("macro debug info has an unmatched `close_file' directive"));
11335 current_file
= current_file
->included_by
;
11336 if (! current_file
)
11338 enum dwarf_macinfo_record_type next_type
;
11340 /* GCC circa March 2002 doesn't produce the zero
11341 type byte marking the end of the compilation
11342 unit. Complain if it's not there, but exit no
11345 /* Do we at least have room for a macinfo type byte? */
11346 if (mac_ptr
>= mac_end
)
11348 dwarf2_macros_too_long_complaint ();
11352 /* We don't increment mac_ptr here, so this is just
11354 next_type
= read_1_byte (abfd
, mac_ptr
);
11355 if (next_type
!= 0)
11356 complaint (&symfile_complaints
,
11357 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11364 case DW_MACINFO_vendor_ext
:
11366 unsigned int bytes_read
;
11370 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11371 mac_ptr
+= bytes_read
;
11372 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11373 mac_ptr
+= bytes_read
;
11375 /* We don't recognize any vendor extensions. */
11379 } while (macinfo_type
!= 0);
11382 /* Check if the attribute's form is a DW_FORM_block*
11383 if so return true else false. */
11385 attr_form_is_block (struct attribute
*attr
)
11387 return (attr
== NULL
? 0 :
11388 attr
->form
== DW_FORM_block1
11389 || attr
->form
== DW_FORM_block2
11390 || attr
->form
== DW_FORM_block4
11391 || attr
->form
== DW_FORM_block
);
11394 /* Return non-zero if ATTR's value is a section offset --- classes
11395 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11396 You may use DW_UNSND (attr) to retrieve such offsets.
11398 Section 7.5.4, "Attribute Encodings", explains that no attribute
11399 may have a value that belongs to more than one of these classes; it
11400 would be ambiguous if we did, because we use the same forms for all
11403 attr_form_is_section_offset (struct attribute
*attr
)
11405 return (attr
->form
== DW_FORM_data4
11406 || attr
->form
== DW_FORM_data8
);
11410 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11411 zero otherwise. When this function returns true, you can apply
11412 dwarf2_get_attr_constant_value to it.
11414 However, note that for some attributes you must check
11415 attr_form_is_section_offset before using this test. DW_FORM_data4
11416 and DW_FORM_data8 are members of both the constant class, and of
11417 the classes that contain offsets into other debug sections
11418 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11419 that, if an attribute's can be either a constant or one of the
11420 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11421 taken as section offsets, not constants. */
11423 attr_form_is_constant (struct attribute
*attr
)
11425 switch (attr
->form
)
11427 case DW_FORM_sdata
:
11428 case DW_FORM_udata
:
11429 case DW_FORM_data1
:
11430 case DW_FORM_data2
:
11431 case DW_FORM_data4
:
11432 case DW_FORM_data8
:
11440 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11441 struct dwarf2_cu
*cu
)
11443 if (attr_form_is_section_offset (attr
)
11444 /* ".debug_loc" may not exist at all, or the offset may be outside
11445 the section. If so, fall through to the complaint in the
11447 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11449 struct dwarf2_loclist_baton
*baton
;
11451 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11452 sizeof (struct dwarf2_loclist_baton
));
11453 baton
->per_cu
= cu
->per_cu
;
11454 gdb_assert (baton
->per_cu
);
11456 /* We don't know how long the location list is, but make sure we
11457 don't run off the edge of the section. */
11458 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11459 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11460 baton
->base_address
= cu
->base_address
;
11461 if (cu
->base_known
== 0)
11462 complaint (&symfile_complaints
,
11463 _("Location list used without specifying the CU base address."));
11465 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11466 SYMBOL_LOCATION_BATON (sym
) = baton
;
11470 struct dwarf2_locexpr_baton
*baton
;
11472 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11473 sizeof (struct dwarf2_locexpr_baton
));
11474 baton
->per_cu
= cu
->per_cu
;
11475 gdb_assert (baton
->per_cu
);
11477 if (attr_form_is_block (attr
))
11479 /* Note that we're just copying the block's data pointer
11480 here, not the actual data. We're still pointing into the
11481 info_buffer for SYM's objfile; right now we never release
11482 that buffer, but when we do clean up properly this may
11484 baton
->size
= DW_BLOCK (attr
)->size
;
11485 baton
->data
= DW_BLOCK (attr
)->data
;
11489 dwarf2_invalid_attrib_class_complaint ("location description",
11490 SYMBOL_NATURAL_NAME (sym
));
11492 baton
->data
= NULL
;
11495 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11496 SYMBOL_LOCATION_BATON (sym
) = baton
;
11500 /* Return the OBJFILE associated with the compilation unit CU. */
11503 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11505 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11507 /* Return the master objfile, so that we can report and look up the
11508 correct file containing this variable. */
11509 if (objfile
->separate_debug_objfile_backlink
)
11510 objfile
= objfile
->separate_debug_objfile_backlink
;
11515 /* Return the address size given in the compilation unit header for CU. */
11518 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11521 return per_cu
->cu
->header
.addr_size
;
11524 /* If the CU is not currently read in, we re-read its header. */
11525 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11526 struct dwarf2_per_objfile
*per_objfile
11527 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11528 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11530 struct comp_unit_head cu_header
;
11531 memset (&cu_header
, 0, sizeof cu_header
);
11532 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11533 return cu_header
.addr_size
;
11537 /* Locate the .debug_info compilation unit from CU's objfile which contains
11538 the DIE at OFFSET. Raises an error on failure. */
11540 static struct dwarf2_per_cu_data
*
11541 dwarf2_find_containing_comp_unit (unsigned int offset
,
11542 struct objfile
*objfile
)
11544 struct dwarf2_per_cu_data
*this_cu
;
11548 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11551 int mid
= low
+ (high
- low
) / 2;
11552 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11557 gdb_assert (low
== high
);
11558 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11561 error (_("Dwarf Error: could not find partial DIE containing "
11562 "offset 0x%lx [in module %s]"),
11563 (long) offset
, bfd_get_filename (objfile
->obfd
));
11565 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11566 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11570 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11571 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11572 && offset
>= this_cu
->offset
+ this_cu
->length
)
11573 error (_("invalid dwarf2 offset %u"), offset
);
11574 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11579 /* Locate the compilation unit from OBJFILE which is located at exactly
11580 OFFSET. Raises an error on failure. */
11582 static struct dwarf2_per_cu_data
*
11583 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11585 struct dwarf2_per_cu_data
*this_cu
;
11586 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11587 if (this_cu
->offset
!= offset
)
11588 error (_("no compilation unit with offset %u."), offset
);
11592 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11594 static struct dwarf2_cu
*
11595 alloc_one_comp_unit (struct objfile
*objfile
)
11597 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11598 cu
->objfile
= objfile
;
11599 obstack_init (&cu
->comp_unit_obstack
);
11603 /* Release one cached compilation unit, CU. We unlink it from the tree
11604 of compilation units, but we don't remove it from the read_in_chain;
11605 the caller is responsible for that.
11606 NOTE: DATA is a void * because this function is also used as a
11607 cleanup routine. */
11610 free_one_comp_unit (void *data
)
11612 struct dwarf2_cu
*cu
= data
;
11614 if (cu
->per_cu
!= NULL
)
11615 cu
->per_cu
->cu
= NULL
;
11618 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11623 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11624 when we're finished with it. We can't free the pointer itself, but be
11625 sure to unlink it from the cache. Also release any associated storage
11626 and perform cache maintenance.
11628 Only used during partial symbol parsing. */
11631 free_stack_comp_unit (void *data
)
11633 struct dwarf2_cu
*cu
= data
;
11635 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11636 cu
->partial_dies
= NULL
;
11638 if (cu
->per_cu
!= NULL
)
11640 /* This compilation unit is on the stack in our caller, so we
11641 should not xfree it. Just unlink it. */
11642 cu
->per_cu
->cu
= NULL
;
11645 /* If we had a per-cu pointer, then we may have other compilation
11646 units loaded, so age them now. */
11647 age_cached_comp_units ();
11651 /* Free all cached compilation units. */
11654 free_cached_comp_units (void *data
)
11656 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11658 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11659 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11660 while (per_cu
!= NULL
)
11662 struct dwarf2_per_cu_data
*next_cu
;
11664 next_cu
= per_cu
->cu
->read_in_chain
;
11666 free_one_comp_unit (per_cu
->cu
);
11667 *last_chain
= next_cu
;
11673 /* Increase the age counter on each cached compilation unit, and free
11674 any that are too old. */
11677 age_cached_comp_units (void)
11679 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11681 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11682 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11683 while (per_cu
!= NULL
)
11685 per_cu
->cu
->last_used
++;
11686 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11687 dwarf2_mark (per_cu
->cu
);
11688 per_cu
= per_cu
->cu
->read_in_chain
;
11691 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11692 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11693 while (per_cu
!= NULL
)
11695 struct dwarf2_per_cu_data
*next_cu
;
11697 next_cu
= per_cu
->cu
->read_in_chain
;
11699 if (!per_cu
->cu
->mark
)
11701 free_one_comp_unit (per_cu
->cu
);
11702 *last_chain
= next_cu
;
11705 last_chain
= &per_cu
->cu
->read_in_chain
;
11711 /* Remove a single compilation unit from the cache. */
11714 free_one_cached_comp_unit (void *target_cu
)
11716 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11718 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11719 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11720 while (per_cu
!= NULL
)
11722 struct dwarf2_per_cu_data
*next_cu
;
11724 next_cu
= per_cu
->cu
->read_in_chain
;
11726 if (per_cu
->cu
== target_cu
)
11728 free_one_comp_unit (per_cu
->cu
);
11729 *last_chain
= next_cu
;
11733 last_chain
= &per_cu
->cu
->read_in_chain
;
11739 /* Release all extra memory associated with OBJFILE. */
11742 dwarf2_free_objfile (struct objfile
*objfile
)
11744 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11746 if (dwarf2_per_objfile
== NULL
)
11749 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11750 free_cached_comp_units (NULL
);
11752 /* Everything else should be on the objfile obstack. */
11755 /* A pair of DIE offset and GDB type pointer. We store these
11756 in a hash table separate from the DIEs, and preserve them
11757 when the DIEs are flushed out of cache. */
11759 struct dwarf2_offset_and_type
11761 unsigned int offset
;
11765 /* Hash function for a dwarf2_offset_and_type. */
11768 offset_and_type_hash (const void *item
)
11770 const struct dwarf2_offset_and_type
*ofs
= item
;
11771 return ofs
->offset
;
11774 /* Equality function for a dwarf2_offset_and_type. */
11777 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11779 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11780 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11781 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11784 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11785 table if necessary. For convenience, return TYPE. */
11787 static struct type
*
11788 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11790 struct dwarf2_offset_and_type
**slot
, ofs
;
11792 /* For Ada types, make sure that the gnat-specific data is always
11793 initialized (if not already set). There are a few types where
11794 we should not be doing so, because the type-specific area is
11795 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11796 where the type-specific area is used to store the floatformat).
11797 But this is not a problem, because the gnat-specific information
11798 is actually not needed for these types. */
11799 if (need_gnat_info (cu
)
11800 && TYPE_CODE (type
) != TYPE_CODE_FUNC
11801 && TYPE_CODE (type
) != TYPE_CODE_FLT
11802 && !HAVE_GNAT_AUX_INFO (type
))
11803 INIT_GNAT_SPECIFIC (type
);
11805 if (cu
->type_hash
== NULL
)
11807 gdb_assert (cu
->per_cu
!= NULL
);
11808 cu
->per_cu
->type_hash
11809 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11810 offset_and_type_hash
,
11811 offset_and_type_eq
,
11813 &cu
->objfile
->objfile_obstack
,
11814 hashtab_obstack_allocate
,
11815 dummy_obstack_deallocate
);
11816 cu
->type_hash
= cu
->per_cu
->type_hash
;
11819 ofs
.offset
= die
->offset
;
11821 slot
= (struct dwarf2_offset_and_type
**)
11822 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11823 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11828 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11829 not have a saved type. */
11831 static struct type
*
11832 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11834 struct dwarf2_offset_and_type
*slot
, ofs
;
11835 htab_t type_hash
= cu
->type_hash
;
11837 if (type_hash
== NULL
)
11840 ofs
.offset
= die
->offset
;
11841 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11848 /* Add a dependence relationship from CU to REF_PER_CU. */
11851 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11852 struct dwarf2_per_cu_data
*ref_per_cu
)
11856 if (cu
->dependencies
== NULL
)
11858 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11859 NULL
, &cu
->comp_unit_obstack
,
11860 hashtab_obstack_allocate
,
11861 dummy_obstack_deallocate
);
11863 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11865 *slot
= ref_per_cu
;
11868 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11869 Set the mark field in every compilation unit in the
11870 cache that we must keep because we are keeping CU. */
11873 dwarf2_mark_helper (void **slot
, void *data
)
11875 struct dwarf2_per_cu_data
*per_cu
;
11877 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11878 if (per_cu
->cu
->mark
)
11880 per_cu
->cu
->mark
= 1;
11882 if (per_cu
->cu
->dependencies
!= NULL
)
11883 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11888 /* Set the mark field in CU and in every other compilation unit in the
11889 cache that we must keep because we are keeping CU. */
11892 dwarf2_mark (struct dwarf2_cu
*cu
)
11897 if (cu
->dependencies
!= NULL
)
11898 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11902 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11906 per_cu
->cu
->mark
= 0;
11907 per_cu
= per_cu
->cu
->read_in_chain
;
11911 /* Trivial hash function for partial_die_info: the hash value of a DIE
11912 is its offset in .debug_info for this objfile. */
11915 partial_die_hash (const void *item
)
11917 const struct partial_die_info
*part_die
= item
;
11918 return part_die
->offset
;
11921 /* Trivial comparison function for partial_die_info structures: two DIEs
11922 are equal if they have the same offset. */
11925 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11927 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11928 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11929 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11932 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11933 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11936 set_dwarf2_cmd (char *args
, int from_tty
)
11938 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11942 show_dwarf2_cmd (char *args
, int from_tty
)
11944 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11947 /* If section described by INFO was mmapped, munmap it now. */
11950 munmap_section_buffer (struct dwarf2_section_info
*info
)
11952 if (info
->was_mmapped
)
11955 intptr_t begin
= (intptr_t) info
->buffer
;
11956 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11957 size_t map_length
= info
->size
+ begin
- map_begin
;
11958 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11960 /* Without HAVE_MMAP, we should never be here to begin with. */
11966 /* munmap debug sections for OBJFILE, if necessary. */
11969 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11971 struct dwarf2_per_objfile
*data
= d
;
11972 munmap_section_buffer (&data
->info
);
11973 munmap_section_buffer (&data
->abbrev
);
11974 munmap_section_buffer (&data
->line
);
11975 munmap_section_buffer (&data
->str
);
11976 munmap_section_buffer (&data
->macinfo
);
11977 munmap_section_buffer (&data
->ranges
);
11978 munmap_section_buffer (&data
->loc
);
11979 munmap_section_buffer (&data
->frame
);
11980 munmap_section_buffer (&data
->eh_frame
);
11983 void _initialize_dwarf2_read (void);
11986 _initialize_dwarf2_read (void)
11988 dwarf2_objfile_data_key
11989 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11991 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11992 Set DWARF 2 specific variables.\n\
11993 Configure DWARF 2 variables such as the cache size"),
11994 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11995 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11997 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11998 Show DWARF 2 specific variables\n\
11999 Show DWARF 2 variables such as the cache size"),
12000 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12001 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12003 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12004 &dwarf2_max_cache_age
, _("\
12005 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12006 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12007 A higher limit means that cached compilation units will be stored\n\
12008 in memory longer, and more total memory will be used. Zero disables\n\
12009 caching, which can slow down startup."),
12011 show_dwarf2_max_cache_age
,
12012 &set_dwarf2_cmdlist
,
12013 &show_dwarf2_cmdlist
);
12015 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12016 Set debugging of the dwarf2 DIE reader."), _("\
12017 Show debugging of the dwarf2 DIE reader."), _("\
12018 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12019 The value is the maximum depth to print."),
12022 &setdebuglist
, &showdebuglist
);