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
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 struct type
*die_containing_type (struct die_info
*,
932 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
934 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
936 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
938 static char *typename_concat (struct obstack
*,
943 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
945 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
947 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
949 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
951 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
952 struct dwarf2_cu
*, struct partial_symtab
*);
954 static int dwarf2_get_pc_bounds (struct die_info
*,
955 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
956 struct partial_symtab
*);
958 static void get_scope_pc_bounds (struct die_info
*,
959 CORE_ADDR
*, CORE_ADDR
*,
962 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
963 CORE_ADDR
, struct dwarf2_cu
*);
965 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
968 static void dwarf2_attach_fields_to_type (struct field_info
*,
969 struct type
*, struct dwarf2_cu
*);
971 static void dwarf2_add_member_fn (struct field_info
*,
972 struct die_info
*, struct type
*,
975 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
976 struct type
*, struct dwarf2_cu
*);
978 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
980 static const char *determine_class_name (struct die_info
*die
,
981 struct dwarf2_cu
*cu
);
983 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
985 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
987 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
989 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
991 static const char *namespace_name (struct die_info
*die
,
992 int *is_anonymous
, struct dwarf2_cu
*);
994 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
996 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
998 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1001 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1003 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1005 gdb_byte
**new_info_ptr
,
1006 struct die_info
*parent
);
1008 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1010 gdb_byte
**new_info_ptr
,
1011 struct die_info
*parent
);
1013 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1015 gdb_byte
**new_info_ptr
,
1016 struct die_info
*parent
);
1018 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1019 struct die_info
**, gdb_byte
*,
1022 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1024 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
1026 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1029 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1031 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1032 struct dwarf2_cu
**);
1034 static char *dwarf_tag_name (unsigned int);
1036 static char *dwarf_attr_name (unsigned int);
1038 static char *dwarf_form_name (unsigned int);
1040 static char *dwarf_stack_op_name (unsigned int);
1042 static char *dwarf_bool_name (unsigned int);
1044 static char *dwarf_type_encoding_name (unsigned int);
1047 static char *dwarf_cfi_name (unsigned int);
1050 static struct die_info
*sibling_die (struct die_info
*);
1052 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1054 static void dump_die_for_error (struct die_info
*);
1056 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1059 /*static*/ void dump_die (struct die_info
*, int max_level
);
1061 static void store_in_ref_table (struct die_info
*,
1062 struct dwarf2_cu
*);
1064 static int is_ref_attr (struct attribute
*);
1066 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1068 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1070 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1072 struct dwarf2_cu
**);
1074 static struct die_info
*follow_die_ref (struct die_info
*,
1076 struct dwarf2_cu
**);
1078 static struct die_info
*follow_die_sig (struct die_info
*,
1080 struct dwarf2_cu
**);
1082 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1083 unsigned int offset
);
1085 static void read_signatured_type (struct objfile
*,
1086 struct signatured_type
*type_sig
);
1088 /* memory allocation interface */
1090 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1092 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1094 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1096 static void initialize_cu_func_list (struct dwarf2_cu
*);
1098 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1099 struct dwarf2_cu
*);
1101 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1102 char *, bfd
*, struct dwarf2_cu
*);
1104 static int attr_form_is_block (struct attribute
*);
1106 static int attr_form_is_section_offset (struct attribute
*);
1108 static int attr_form_is_constant (struct attribute
*);
1110 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1112 struct dwarf2_cu
*cu
);
1114 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1115 struct abbrev_info
*abbrev
,
1116 struct dwarf2_cu
*cu
);
1118 static void free_stack_comp_unit (void *);
1120 static hashval_t
partial_die_hash (const void *item
);
1122 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1124 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1125 (unsigned int offset
, struct objfile
*objfile
);
1127 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1128 (unsigned int offset
, struct objfile
*objfile
);
1130 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1132 static void free_one_comp_unit (void *);
1134 static void free_cached_comp_units (void *);
1136 static void age_cached_comp_units (void);
1138 static void free_one_cached_comp_unit (void *);
1140 static struct type
*set_die_type (struct die_info
*, struct type
*,
1141 struct dwarf2_cu
*);
1143 static void create_all_comp_units (struct objfile
*);
1145 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1148 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1150 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1151 struct dwarf2_per_cu_data
*);
1153 static void dwarf2_mark (struct dwarf2_cu
*);
1155 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1157 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1159 /* Try to locate the sections we need for DWARF 2 debugging
1160 information and return true if we have enough to do something. */
1163 dwarf2_has_info (struct objfile
*objfile
)
1165 struct dwarf2_per_objfile
*data
;
1167 /* Initialize per-objfile state. */
1168 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1169 memset (data
, 0, sizeof (*data
));
1170 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1171 dwarf2_per_objfile
= data
;
1173 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1174 return (data
->info
.asection
!= NULL
&& data
->abbrev
.asection
!= NULL
);
1177 /* When loading sections, we can either look for ".<name>", or for
1178 * ".z<name>", which indicates a compressed section. */
1181 section_is_p (const char *section_name
, const char *name
)
1183 return (section_name
[0] == '.'
1184 && (strcmp (section_name
+ 1, name
) == 0
1185 || (section_name
[1] == 'z'
1186 && strcmp (section_name
+ 2, name
) == 0)));
1189 /* This function is mapped across the sections and remembers the
1190 offset and size of each of the debugging sections we are interested
1194 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1196 if (section_is_p (sectp
->name
, INFO_SECTION
))
1198 dwarf2_per_objfile
->info
.asection
= sectp
;
1199 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1201 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1203 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1204 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1206 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1208 dwarf2_per_objfile
->line
.asection
= sectp
;
1209 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1211 else if (section_is_p (sectp
->name
, PUBNAMES_SECTION
))
1213 dwarf2_per_objfile
->pubnames
.asection
= sectp
;
1214 dwarf2_per_objfile
->pubnames
.size
= bfd_get_section_size (sectp
);
1216 else if (section_is_p (sectp
->name
, ARANGES_SECTION
))
1218 dwarf2_per_objfile
->aranges
.asection
= sectp
;
1219 dwarf2_per_objfile
->aranges
.size
= bfd_get_section_size (sectp
);
1221 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1223 dwarf2_per_objfile
->loc
.asection
= sectp
;
1224 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1226 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1228 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1229 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1231 else if (section_is_p (sectp
->name
, STR_SECTION
))
1233 dwarf2_per_objfile
->str
.asection
= sectp
;
1234 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1236 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1238 dwarf2_per_objfile
->frame
.asection
= sectp
;
1239 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1241 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1243 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1244 if (aflag
& SEC_HAS_CONTENTS
)
1246 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1247 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1250 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1252 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1253 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1255 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1257 dwarf2_per_objfile
->types
.asection
= sectp
;
1258 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1261 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1262 && bfd_section_vma (abfd
, sectp
) == 0)
1263 dwarf2_per_objfile
->has_section_at_zero
= 1;
1266 /* Decompress a section that was compressed using zlib. Store the
1267 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1270 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1271 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1273 bfd
*abfd
= objfile
->obfd
;
1275 error (_("Support for zlib-compressed DWARF data (from '%s') "
1276 "is disabled in this copy of GDB"),
1277 bfd_get_filename (abfd
));
1279 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1280 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1281 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1282 bfd_size_type uncompressed_size
;
1283 gdb_byte
*uncompressed_buffer
;
1286 int header_size
= 12;
1288 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1289 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1290 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1291 bfd_get_filename (abfd
));
1293 /* Read the zlib header. In this case, it should be "ZLIB" followed
1294 by the uncompressed section size, 8 bytes in big-endian order. */
1295 if (compressed_size
< header_size
1296 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1297 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1298 bfd_get_filename (abfd
));
1299 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1300 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1301 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1302 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1303 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1304 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1305 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1306 uncompressed_size
+= compressed_buffer
[11];
1308 /* It is possible the section consists of several compressed
1309 buffers concatenated together, so we uncompress in a loop. */
1313 strm
.avail_in
= compressed_size
- header_size
;
1314 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1315 strm
.avail_out
= uncompressed_size
;
1316 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1318 rc
= inflateInit (&strm
);
1319 while (strm
.avail_in
> 0)
1322 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1323 bfd_get_filename (abfd
), rc
);
1324 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1325 + (uncompressed_size
- strm
.avail_out
));
1326 rc
= inflate (&strm
, Z_FINISH
);
1327 if (rc
!= Z_STREAM_END
)
1328 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1329 bfd_get_filename (abfd
), rc
);
1330 rc
= inflateReset (&strm
);
1332 rc
= inflateEnd (&strm
);
1334 || strm
.avail_out
!= 0)
1335 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1336 bfd_get_filename (abfd
), rc
);
1338 do_cleanups (cleanup
);
1339 *outbuf
= uncompressed_buffer
;
1340 *outsize
= uncompressed_size
;
1344 /* Read the contents of the section SECTP from object file specified by
1345 OBJFILE, store info about the section into INFO.
1346 If the section is compressed, uncompress it before returning. */
1349 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1351 bfd
*abfd
= objfile
->obfd
;
1352 asection
*sectp
= info
->asection
;
1353 gdb_byte
*buf
, *retbuf
;
1354 unsigned char header
[4];
1356 info
->buffer
= NULL
;
1357 info
->was_mmapped
= 0;
1359 if (info
->asection
== NULL
|| info
->size
== 0)
1362 /* Check if the file has a 4-byte header indicating compression. */
1363 if (info
->size
> sizeof (header
)
1364 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1365 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1367 /* Upon decompression, update the buffer and its size. */
1368 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1370 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1378 pagesize
= getpagesize ();
1380 /* Only try to mmap sections which are large enough: we don't want to
1381 waste space due to fragmentation. Also, only try mmap for sections
1382 without relocations. */
1384 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1386 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1387 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1388 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1389 MAP_PRIVATE
, pg_offset
);
1391 if (retbuf
!= MAP_FAILED
)
1393 info
->was_mmapped
= 1;
1394 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1400 /* If we get here, we are a normal, not-compressed section. */
1402 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1404 /* When debugging .o files, we may need to apply relocations; see
1405 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1406 We never compress sections in .o files, so we only need to
1407 try this when the section is not compressed. */
1408 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
1411 info
->buffer
= retbuf
;
1415 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1416 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1417 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1418 bfd_get_filename (abfd
));
1421 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1425 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1426 asection
**sectp
, gdb_byte
**bufp
,
1427 bfd_size_type
*sizep
)
1429 struct dwarf2_per_objfile
*data
1430 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1431 struct dwarf2_section_info
*info
;
1432 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1433 info
= &data
->eh_frame
;
1434 else if (section_is_p (section_name
, FRAME_SECTION
))
1435 info
= &data
->frame
;
1439 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1440 /* We haven't read this section in yet. Do it now. */
1441 dwarf2_read_section (objfile
, info
);
1443 *sectp
= info
->asection
;
1444 *bufp
= info
->buffer
;
1445 *sizep
= info
->size
;
1448 /* Build a partial symbol table. */
1451 dwarf2_build_psymtabs (struct objfile
*objfile
)
1453 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
1454 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->abbrev
);
1455 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->line
);
1456 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->str
);
1457 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->macinfo
);
1458 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
1459 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->loc
);
1461 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->eh_frame
);
1462 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->frame
);
1464 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1466 init_psymbol_list (objfile
, 1024);
1470 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1472 /* Things are significantly easier if we have .debug_aranges and
1473 .debug_pubnames sections */
1475 dwarf2_build_psymtabs_easy (objfile
);
1479 /* only test this case for now */
1481 /* In this case we have to work a bit harder */
1482 dwarf2_build_psymtabs_hard (objfile
);
1487 /* Build the partial symbol table from the information in the
1488 .debug_pubnames and .debug_aranges sections. */
1491 dwarf2_build_psymtabs_easy (struct objfile
*objfile
)
1493 bfd
*abfd
= objfile
->obfd
;
1494 char *aranges_buffer
, *pubnames_buffer
;
1495 char *aranges_ptr
, *pubnames_ptr
;
1496 unsigned int entry_length
, version
, info_offset
, info_size
;
1498 pubnames_buffer
= dwarf2_read_section (objfile
,
1499 dwarf_pubnames_section
);
1500 pubnames_ptr
= pubnames_buffer
;
1501 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames
.size
)
1503 unsigned int bytes_read
;
1505 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &bytes_read
);
1506 pubnames_ptr
+= bytes_read
;
1507 version
= read_1_byte (abfd
, pubnames_ptr
);
1509 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1511 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1515 aranges_buffer
= dwarf2_read_section (objfile
,
1516 dwarf_aranges_section
);
1521 /* Return TRUE if OFFSET is within CU_HEADER. */
1524 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1526 unsigned int bottom
= cu_header
->offset
;
1527 unsigned int top
= (cu_header
->offset
1529 + cu_header
->initial_length_size
);
1530 return (offset
>= bottom
&& offset
< top
);
1533 /* Read in the comp unit header information from the debug_info at info_ptr.
1534 NOTE: This leaves members offset, first_die_offset to be filled in
1538 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1539 gdb_byte
*info_ptr
, bfd
*abfd
)
1542 unsigned int bytes_read
;
1544 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1545 cu_header
->initial_length_size
= bytes_read
;
1546 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1547 info_ptr
+= bytes_read
;
1548 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1550 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1552 info_ptr
+= bytes_read
;
1553 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1555 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1556 if (signed_addr
< 0)
1557 internal_error (__FILE__
, __LINE__
,
1558 _("read_comp_unit_head: dwarf from non elf file"));
1559 cu_header
->signed_addr_p
= signed_addr
;
1565 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1566 gdb_byte
*buffer
, unsigned int buffer_size
,
1569 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1571 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1573 if (header
->version
!= 2 && header
->version
!= 3)
1574 error (_("Dwarf Error: wrong version in compilation unit header "
1575 "(is %d, should be %d) [in module %s]"), header
->version
,
1576 2, bfd_get_filename (abfd
));
1578 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1579 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1580 "(offset 0x%lx + 6) [in module %s]"),
1581 (long) header
->abbrev_offset
,
1582 (long) (beg_of_comp_unit
- buffer
),
1583 bfd_get_filename (abfd
));
1585 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1586 > buffer
+ buffer_size
)
1587 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1588 "(offset 0x%lx + 0) [in module %s]"),
1589 (long) header
->length
,
1590 (long) (beg_of_comp_unit
- buffer
),
1591 bfd_get_filename (abfd
));
1596 /* Read in the types comp unit header information from .debug_types entry at
1597 types_ptr. The result is a pointer to one past the end of the header. */
1600 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1601 ULONGEST
*signature
,
1602 gdb_byte
*types_ptr
, bfd
*abfd
)
1604 unsigned int bytes_read
;
1605 gdb_byte
*initial_types_ptr
= types_ptr
;
1607 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1609 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1611 *signature
= read_8_bytes (abfd
, types_ptr
);
1613 types_ptr
+= cu_header
->offset_size
;
1614 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1619 /* Allocate a new partial symtab for file named NAME and mark this new
1620 partial symtab as being an include of PST. */
1623 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1624 struct objfile
*objfile
)
1626 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1628 subpst
->section_offsets
= pst
->section_offsets
;
1629 subpst
->textlow
= 0;
1630 subpst
->texthigh
= 0;
1632 subpst
->dependencies
= (struct partial_symtab
**)
1633 obstack_alloc (&objfile
->objfile_obstack
,
1634 sizeof (struct partial_symtab
*));
1635 subpst
->dependencies
[0] = pst
;
1636 subpst
->number_of_dependencies
= 1;
1638 subpst
->globals_offset
= 0;
1639 subpst
->n_global_syms
= 0;
1640 subpst
->statics_offset
= 0;
1641 subpst
->n_static_syms
= 0;
1642 subpst
->symtab
= NULL
;
1643 subpst
->read_symtab
= pst
->read_symtab
;
1646 /* No private part is necessary for include psymtabs. This property
1647 can be used to differentiate between such include psymtabs and
1648 the regular ones. */
1649 subpst
->read_symtab_private
= NULL
;
1652 /* Read the Line Number Program data and extract the list of files
1653 included by the source file represented by PST. Build an include
1654 partial symtab for each of these included files. */
1657 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1658 struct die_info
*die
,
1659 struct partial_symtab
*pst
)
1661 struct objfile
*objfile
= cu
->objfile
;
1662 bfd
*abfd
= objfile
->obfd
;
1663 struct line_header
*lh
= NULL
;
1664 struct attribute
*attr
;
1666 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1669 unsigned int line_offset
= DW_UNSND (attr
);
1670 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1673 return; /* No linetable, so no includes. */
1675 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1677 free_line_header (lh
);
1681 hash_type_signature (const void *item
)
1683 const struct signatured_type
*type_sig
= item
;
1684 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1685 return type_sig
->signature
;
1689 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1691 const struct signatured_type
*lhs
= item_lhs
;
1692 const struct signatured_type
*rhs
= item_rhs
;
1693 return lhs
->signature
== rhs
->signature
;
1696 /* Create the hash table of all entries in the .debug_types section.
1697 The result is zero if there is an error (e.g. missing .debug_types section),
1698 otherwise non-zero. */
1701 create_debug_types_hash_table (struct objfile
*objfile
)
1703 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1706 if (info_ptr
== NULL
)
1708 dwarf2_per_objfile
->signatured_types
= NULL
;
1712 types_htab
= htab_create_alloc_ex (41,
1713 hash_type_signature
,
1716 &objfile
->objfile_obstack
,
1717 hashtab_obstack_allocate
,
1718 dummy_obstack_deallocate
);
1720 if (dwarf2_die_debug
)
1721 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1723 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1725 unsigned int offset
;
1726 unsigned int offset_size
;
1727 unsigned int type_offset
;
1728 unsigned int length
, initial_length_size
;
1729 unsigned short version
;
1731 struct signatured_type
*type_sig
;
1733 gdb_byte
*ptr
= info_ptr
;
1735 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1737 /* We need to read the type's signature in order to build the hash
1738 table, but we don't need to read anything else just yet. */
1740 /* Sanity check to ensure entire cu is present. */
1741 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1742 if (ptr
+ length
+ initial_length_size
1743 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1745 complaint (&symfile_complaints
,
1746 _("debug type entry runs off end of `.debug_types' section, ignored"));
1750 offset_size
= initial_length_size
== 4 ? 4 : 8;
1751 ptr
+= initial_length_size
;
1752 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1754 ptr
+= offset_size
; /* abbrev offset */
1755 ptr
+= 1; /* address size */
1756 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1758 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1760 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1761 memset (type_sig
, 0, sizeof (*type_sig
));
1762 type_sig
->signature
= signature
;
1763 type_sig
->offset
= offset
;
1764 type_sig
->type_offset
= type_offset
;
1766 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1767 gdb_assert (slot
!= NULL
);
1770 if (dwarf2_die_debug
)
1771 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1772 offset
, phex (signature
, sizeof (signature
)));
1774 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1777 dwarf2_per_objfile
->signatured_types
= types_htab
;
1782 /* Lookup a signature based type.
1783 Returns NULL if SIG is not present in the table. */
1785 static struct signatured_type
*
1786 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1788 struct signatured_type find_entry
, *entry
;
1790 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1792 complaint (&symfile_complaints
,
1793 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1797 find_entry
.signature
= sig
;
1798 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1802 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1805 init_cu_die_reader (struct die_reader_specs
*reader
,
1806 struct dwarf2_cu
*cu
)
1808 reader
->abfd
= cu
->objfile
->obfd
;
1810 if (cu
->per_cu
->from_debug_types
)
1811 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1813 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1816 /* Find the base address of the compilation unit for range lists and
1817 location lists. It will normally be specified by DW_AT_low_pc.
1818 In DWARF-3 draft 4, the base address could be overridden by
1819 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1820 compilation units with discontinuous ranges. */
1823 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1825 struct attribute
*attr
;
1828 cu
->base_address
= 0;
1830 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1833 cu
->base_address
= DW_ADDR (attr
);
1838 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1841 cu
->base_address
= DW_ADDR (attr
);
1847 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1848 to combine the common parts.
1849 Process a compilation unit for a psymtab.
1850 BUFFER is a pointer to the beginning of the dwarf section buffer,
1851 either .debug_info or debug_types.
1852 INFO_PTR is a pointer to the start of the CU.
1853 Returns a pointer to the next CU. */
1856 process_psymtab_comp_unit (struct objfile
*objfile
,
1857 struct dwarf2_per_cu_data
*this_cu
,
1858 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1859 unsigned int buffer_size
)
1861 bfd
*abfd
= objfile
->obfd
;
1862 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1863 struct die_info
*comp_unit_die
;
1864 struct partial_symtab
*pst
;
1866 struct cleanup
*back_to_inner
;
1867 struct dwarf2_cu cu
;
1868 unsigned int bytes_read
;
1869 int has_children
, has_pc_info
;
1870 struct attribute
*attr
;
1872 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1873 struct die_reader_specs reader_specs
;
1875 memset (&cu
, 0, sizeof (cu
));
1876 cu
.objfile
= objfile
;
1877 obstack_init (&cu
.comp_unit_obstack
);
1879 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1881 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1882 buffer
, buffer_size
,
1885 /* Complete the cu_header. */
1886 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1887 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1889 cu
.list_in_scope
= &file_symbols
;
1891 /* If this compilation unit was already read in, free the
1892 cached copy in order to read it in again. This is
1893 necessary because we skipped some symbols when we first
1894 read in the compilation unit (see load_partial_dies).
1895 This problem could be avoided, but the benefit is
1897 if (this_cu
->cu
!= NULL
)
1898 free_one_cached_comp_unit (this_cu
->cu
);
1900 /* Note that this is a pointer to our stack frame, being
1901 added to a global data structure. It will be cleaned up
1902 in free_stack_comp_unit when we finish with this
1903 compilation unit. */
1905 cu
.per_cu
= this_cu
;
1907 /* Read the abbrevs for this compilation unit into a table. */
1908 dwarf2_read_abbrevs (abfd
, &cu
);
1909 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1911 /* Read the compilation unit die. */
1912 if (this_cu
->from_debug_types
)
1913 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1914 init_cu_die_reader (&reader_specs
, &cu
);
1915 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1918 if (this_cu
->from_debug_types
)
1920 /* offset,length haven't been set yet for type units. */
1921 this_cu
->offset
= cu
.header
.offset
;
1922 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1924 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1926 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1927 + cu
.header
.initial_length_size
);
1928 do_cleanups (back_to_inner
);
1932 /* Set the language we're debugging. */
1933 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1935 set_cu_language (DW_UNSND (attr
), &cu
);
1937 set_cu_language (language_minimal
, &cu
);
1939 /* Allocate a new partial symbol table structure. */
1940 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1941 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1942 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1943 /* TEXTLOW and TEXTHIGH are set below. */
1945 objfile
->global_psymbols
.next
,
1946 objfile
->static_psymbols
.next
);
1948 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1950 pst
->dirname
= DW_STRING (attr
);
1952 pst
->read_symtab_private
= (char *) this_cu
;
1954 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1956 /* Store the function that reads in the rest of the symbol table */
1957 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1959 this_cu
->psymtab
= pst
;
1961 dwarf2_find_base_address (comp_unit_die
, &cu
);
1963 /* Possibly set the default values of LOWPC and HIGHPC from
1965 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1966 &best_highpc
, &cu
, pst
);
1967 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1968 /* Store the contiguous range if it is not empty; it can be empty for
1969 CUs with no code. */
1970 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1971 best_lowpc
+ baseaddr
,
1972 best_highpc
+ baseaddr
- 1, pst
);
1974 /* Check if comp unit has_children.
1975 If so, read the rest of the partial symbols from this comp unit.
1976 If not, there's no more debug_info for this comp unit. */
1979 struct partial_die_info
*first_die
;
1980 CORE_ADDR lowpc
, highpc
;
1982 lowpc
= ((CORE_ADDR
) -1);
1983 highpc
= ((CORE_ADDR
) 0);
1985 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1987 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1988 ! has_pc_info
, &cu
);
1990 /* If we didn't find a lowpc, set it to highpc to avoid
1991 complaints from `maint check'. */
1992 if (lowpc
== ((CORE_ADDR
) -1))
1995 /* If the compilation unit didn't have an explicit address range,
1996 then use the information extracted from its child dies. */
2000 best_highpc
= highpc
;
2003 pst
->textlow
= best_lowpc
+ baseaddr
;
2004 pst
->texthigh
= best_highpc
+ baseaddr
;
2006 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
2007 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2008 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
2009 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2010 sort_pst_symbols (pst
);
2012 /* If there is already a psymtab or symtab for a file of this
2013 name, remove it. (If there is a symtab, more drastic things
2014 also happen.) This happens in VxWorks. */
2015 if (! this_cu
->from_debug_types
)
2016 free_named_symtabs (pst
->filename
);
2018 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
2019 + cu
.header
.initial_length_size
);
2021 if (this_cu
->from_debug_types
)
2023 /* It's not clear we want to do anything with stmt lists here.
2024 Waiting to see what gcc ultimately does. */
2028 /* Get the list of files included in the current compilation unit,
2029 and build a psymtab for each of them. */
2030 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
2033 do_cleanups (back_to_inner
);
2038 /* Traversal function for htab_traverse_noresize.
2039 Process one .debug_types comp-unit. */
2042 process_type_comp_unit (void **slot
, void *info
)
2044 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
2045 struct objfile
*objfile
= (struct objfile
*) info
;
2046 struct dwarf2_per_cu_data
*this_cu
;
2048 this_cu
= &entry
->per_cu
;
2049 this_cu
->from_debug_types
= 1;
2051 process_psymtab_comp_unit (objfile
, this_cu
,
2052 dwarf2_per_objfile
->types
.buffer
,
2053 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
2054 dwarf2_per_objfile
->types
.size
);
2059 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2060 Build partial symbol tables for the .debug_types comp-units. */
2063 build_type_psymtabs (struct objfile
*objfile
)
2065 if (! create_debug_types_hash_table (objfile
))
2068 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2069 process_type_comp_unit
, objfile
);
2072 /* Build the partial symbol table by doing a quick pass through the
2073 .debug_info and .debug_abbrev sections. */
2076 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2078 /* Instead of reading this into a big buffer, we should probably use
2079 mmap() on architectures that support it. (FIXME) */
2080 bfd
*abfd
= objfile
->obfd
;
2082 struct cleanup
*back_to
;
2084 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2086 /* Any cached compilation units will be linked by the per-objfile
2087 read_in_chain. Make sure to free them when we're done. */
2088 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2090 build_type_psymtabs (objfile
);
2092 create_all_comp_units (objfile
);
2094 objfile
->psymtabs_addrmap
=
2095 addrmap_create_mutable (&objfile
->objfile_obstack
);
2097 /* Since the objects we're extracting from .debug_info vary in
2098 length, only the individual functions to extract them (like
2099 read_comp_unit_head and load_partial_die) can really know whether
2100 the buffer is large enough to hold another complete object.
2102 At the moment, they don't actually check that. If .debug_info
2103 holds just one extra byte after the last compilation unit's dies,
2104 then read_comp_unit_head will happily read off the end of the
2105 buffer. read_partial_die is similarly casual. Those functions
2108 For this loop condition, simply checking whether there's any data
2109 left at all should be sufficient. */
2111 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2112 + dwarf2_per_objfile
->info
.size
))
2114 struct dwarf2_per_cu_data
*this_cu
;
2116 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2119 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2120 dwarf2_per_objfile
->info
.buffer
,
2122 dwarf2_per_objfile
->info
.size
);
2125 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2126 &objfile
->objfile_obstack
);
2128 do_cleanups (back_to
);
2131 /* Load the partial DIEs for a secondary CU into memory. */
2134 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2135 struct objfile
*objfile
)
2137 bfd
*abfd
= objfile
->obfd
;
2138 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2139 struct die_info
*comp_unit_die
;
2140 struct dwarf2_cu
*cu
;
2141 unsigned int bytes_read
;
2142 struct cleanup
*back_to
;
2143 struct attribute
*attr
;
2145 struct die_reader_specs reader_specs
;
2147 gdb_assert (! this_cu
->from_debug_types
);
2149 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2150 beg_of_comp_unit
= info_ptr
;
2152 cu
= alloc_one_comp_unit (objfile
);
2154 /* ??? Missing cleanup for CU? */
2156 /* Link this compilation unit into the compilation unit tree. */
2158 cu
->per_cu
= this_cu
;
2159 cu
->type_hash
= this_cu
->type_hash
;
2161 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2162 dwarf2_per_objfile
->info
.buffer
,
2163 dwarf2_per_objfile
->info
.size
,
2166 /* Complete the cu_header. */
2167 cu
->header
.offset
= this_cu
->offset
;
2168 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2170 /* Read the abbrevs for this compilation unit into a table. */
2171 dwarf2_read_abbrevs (abfd
, cu
);
2172 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2174 /* Read the compilation unit die. */
2175 init_cu_die_reader (&reader_specs
, cu
);
2176 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2179 /* Set the language we're debugging. */
2180 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2182 set_cu_language (DW_UNSND (attr
), cu
);
2184 set_cu_language (language_minimal
, cu
);
2186 /* Check if comp unit has_children.
2187 If so, read the rest of the partial symbols from this comp unit.
2188 If not, there's no more debug_info for this comp unit. */
2190 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2192 do_cleanups (back_to
);
2195 /* Create a list of all compilation units in OBJFILE. We do this only
2196 if an inter-comp-unit reference is found; presumably if there is one,
2197 there will be many, and one will occur early in the .debug_info section.
2198 So there's no point in building this list incrementally. */
2201 create_all_comp_units (struct objfile
*objfile
)
2205 struct dwarf2_per_cu_data
**all_comp_units
;
2206 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2210 all_comp_units
= xmalloc (n_allocated
2211 * sizeof (struct dwarf2_per_cu_data
*));
2213 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2215 unsigned int length
, initial_length_size
;
2216 gdb_byte
*beg_of_comp_unit
;
2217 struct dwarf2_per_cu_data
*this_cu
;
2218 unsigned int offset
;
2220 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2222 /* Read just enough information to find out where the next
2223 compilation unit is. */
2224 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2225 &initial_length_size
);
2227 /* Save the compilation unit for later lookup. */
2228 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2229 sizeof (struct dwarf2_per_cu_data
));
2230 memset (this_cu
, 0, sizeof (*this_cu
));
2231 this_cu
->offset
= offset
;
2232 this_cu
->length
= length
+ initial_length_size
;
2234 if (n_comp_units
== n_allocated
)
2237 all_comp_units
= xrealloc (all_comp_units
,
2239 * sizeof (struct dwarf2_per_cu_data
*));
2241 all_comp_units
[n_comp_units
++] = this_cu
;
2243 info_ptr
= info_ptr
+ this_cu
->length
;
2246 dwarf2_per_objfile
->all_comp_units
2247 = obstack_alloc (&objfile
->objfile_obstack
,
2248 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2249 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2250 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2251 xfree (all_comp_units
);
2252 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2255 /* Process all loaded DIEs for compilation unit CU, starting at
2256 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2257 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2258 DW_AT_ranges). If NEED_PC is set, then this function will set
2259 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2260 and record the covered ranges in the addrmap. */
2263 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2264 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2266 struct objfile
*objfile
= cu
->objfile
;
2267 bfd
*abfd
= objfile
->obfd
;
2268 struct partial_die_info
*pdi
;
2270 /* Now, march along the PDI's, descending into ones which have
2271 interesting children but skipping the children of the other ones,
2272 until we reach the end of the compilation unit. */
2278 fixup_partial_die (pdi
, cu
);
2280 /* Anonymous namespaces have no name but have interesting
2281 children, so we need to look at them. Ditto for anonymous
2284 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2285 || pdi
->tag
== DW_TAG_enumeration_type
)
2289 case DW_TAG_subprogram
:
2290 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2292 case DW_TAG_variable
:
2293 case DW_TAG_typedef
:
2294 case DW_TAG_union_type
:
2295 if (!pdi
->is_declaration
)
2297 add_partial_symbol (pdi
, cu
);
2300 case DW_TAG_class_type
:
2301 case DW_TAG_interface_type
:
2302 case DW_TAG_structure_type
:
2303 if (!pdi
->is_declaration
)
2305 add_partial_symbol (pdi
, cu
);
2308 case DW_TAG_enumeration_type
:
2309 if (!pdi
->is_declaration
)
2310 add_partial_enumeration (pdi
, cu
);
2312 case DW_TAG_base_type
:
2313 case DW_TAG_subrange_type
:
2314 /* File scope base type definitions are added to the partial
2316 add_partial_symbol (pdi
, cu
);
2318 case DW_TAG_namespace
:
2319 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2322 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2329 /* If the die has a sibling, skip to the sibling. */
2331 pdi
= pdi
->die_sibling
;
2335 /* Functions used to compute the fully scoped name of a partial DIE.
2337 Normally, this is simple. For C++, the parent DIE's fully scoped
2338 name is concatenated with "::" and the partial DIE's name. For
2339 Java, the same thing occurs except that "." is used instead of "::".
2340 Enumerators are an exception; they use the scope of their parent
2341 enumeration type, i.e. the name of the enumeration type is not
2342 prepended to the enumerator.
2344 There are two complexities. One is DW_AT_specification; in this
2345 case "parent" means the parent of the target of the specification,
2346 instead of the direct parent of the DIE. The other is compilers
2347 which do not emit DW_TAG_namespace; in this case we try to guess
2348 the fully qualified name of structure types from their members'
2349 linkage names. This must be done using the DIE's children rather
2350 than the children of any DW_AT_specification target. We only need
2351 to do this for structures at the top level, i.e. if the target of
2352 any DW_AT_specification (if any; otherwise the DIE itself) does not
2355 /* Compute the scope prefix associated with PDI's parent, in
2356 compilation unit CU. The result will be allocated on CU's
2357 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2358 field. NULL is returned if no prefix is necessary. */
2360 partial_die_parent_scope (struct partial_die_info
*pdi
,
2361 struct dwarf2_cu
*cu
)
2363 char *grandparent_scope
;
2364 struct partial_die_info
*parent
, *real_pdi
;
2366 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2367 then this means the parent of the specification DIE. */
2370 while (real_pdi
->has_specification
)
2371 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2373 parent
= real_pdi
->die_parent
;
2377 if (parent
->scope_set
)
2378 return parent
->scope
;
2380 fixup_partial_die (parent
, cu
);
2382 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2384 if (parent
->tag
== DW_TAG_namespace
2385 || parent
->tag
== DW_TAG_structure_type
2386 || parent
->tag
== DW_TAG_class_type
2387 || parent
->tag
== DW_TAG_interface_type
2388 || parent
->tag
== DW_TAG_union_type
)
2390 if (grandparent_scope
== NULL
)
2391 parent
->scope
= parent
->name
;
2393 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2396 else if (parent
->tag
== DW_TAG_enumeration_type
)
2397 /* Enumerators should not get the name of the enumeration as a prefix. */
2398 parent
->scope
= grandparent_scope
;
2401 /* FIXME drow/2004-04-01: What should we be doing with
2402 function-local names? For partial symbols, we should probably be
2404 complaint (&symfile_complaints
,
2405 _("unhandled containing DIE tag %d for DIE at %d"),
2406 parent
->tag
, pdi
->offset
);
2407 parent
->scope
= grandparent_scope
;
2410 parent
->scope_set
= 1;
2411 return parent
->scope
;
2414 /* Return the fully scoped name associated with PDI, from compilation unit
2415 CU. The result will be allocated with malloc. */
2417 partial_die_full_name (struct partial_die_info
*pdi
,
2418 struct dwarf2_cu
*cu
)
2422 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2423 if (parent_scope
== NULL
)
2426 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2430 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2432 struct objfile
*objfile
= cu
->objfile
;
2434 char *actual_name
= NULL
;
2435 const char *my_prefix
;
2436 const struct partial_symbol
*psym
= NULL
;
2438 int built_actual_name
= 0;
2440 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2442 if (pdi_needs_namespace (pdi
->tag
))
2444 actual_name
= partial_die_full_name (pdi
, cu
);
2446 built_actual_name
= 1;
2449 if (actual_name
== NULL
)
2450 actual_name
= pdi
->name
;
2454 case DW_TAG_subprogram
:
2455 if (pdi
->is_external
|| cu
->language
== language_ada
)
2457 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2458 of the global scope. But in Ada, we want to be able to access
2459 nested procedures globally. So all Ada subprograms are stored
2460 in the global scope. */
2461 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2462 mst_text, objfile); */
2463 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2465 VAR_DOMAIN
, LOC_BLOCK
,
2466 &objfile
->global_psymbols
,
2467 0, pdi
->lowpc
+ baseaddr
,
2468 cu
->language
, objfile
);
2472 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2473 mst_file_text, objfile); */
2474 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2476 VAR_DOMAIN
, LOC_BLOCK
,
2477 &objfile
->static_psymbols
,
2478 0, pdi
->lowpc
+ baseaddr
,
2479 cu
->language
, objfile
);
2482 case DW_TAG_variable
:
2483 if (pdi
->is_external
)
2486 Don't enter into the minimal symbol tables as there is
2487 a minimal symbol table entry from the ELF symbols already.
2488 Enter into partial symbol table if it has a location
2489 descriptor or a type.
2490 If the location descriptor is missing, new_symbol will create
2491 a LOC_UNRESOLVED symbol, the address of the variable will then
2492 be determined from the minimal symbol table whenever the variable
2494 The address for the partial symbol table entry is not
2495 used by GDB, but it comes in handy for debugging partial symbol
2499 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2500 if (pdi
->locdesc
|| pdi
->has_type
)
2501 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2503 VAR_DOMAIN
, LOC_STATIC
,
2504 &objfile
->global_psymbols
,
2506 cu
->language
, objfile
);
2510 /* Static Variable. Skip symbols without location descriptors. */
2511 if (pdi
->locdesc
== NULL
)
2513 if (built_actual_name
)
2514 xfree (actual_name
);
2517 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2518 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2519 mst_file_data, objfile); */
2520 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2522 VAR_DOMAIN
, LOC_STATIC
,
2523 &objfile
->static_psymbols
,
2525 cu
->language
, objfile
);
2528 case DW_TAG_typedef
:
2529 case DW_TAG_base_type
:
2530 case DW_TAG_subrange_type
:
2531 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2533 VAR_DOMAIN
, LOC_TYPEDEF
,
2534 &objfile
->static_psymbols
,
2535 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2537 case DW_TAG_namespace
:
2538 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2540 VAR_DOMAIN
, LOC_TYPEDEF
,
2541 &objfile
->global_psymbols
,
2542 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2544 case DW_TAG_class_type
:
2545 case DW_TAG_interface_type
:
2546 case DW_TAG_structure_type
:
2547 case DW_TAG_union_type
:
2548 case DW_TAG_enumeration_type
:
2549 /* Skip external references. The DWARF standard says in the section
2550 about "Structure, Union, and Class Type Entries": "An incomplete
2551 structure, union or class type is represented by a structure,
2552 union or class entry that does not have a byte size attribute
2553 and that has a DW_AT_declaration attribute." */
2554 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2556 if (built_actual_name
)
2557 xfree (actual_name
);
2561 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2562 static vs. global. */
2563 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2565 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2566 (cu
->language
== language_cplus
2567 || cu
->language
== language_java
)
2568 ? &objfile
->global_psymbols
2569 : &objfile
->static_psymbols
,
2570 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2573 case DW_TAG_enumerator
:
2574 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2576 VAR_DOMAIN
, LOC_CONST
,
2577 (cu
->language
== language_cplus
2578 || cu
->language
== language_java
)
2579 ? &objfile
->global_psymbols
2580 : &objfile
->static_psymbols
,
2581 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2587 /* Check to see if we should scan the name for possible namespace
2588 info. Only do this if this is C++, if we don't have namespace
2589 debugging info in the file, if the psym is of an appropriate type
2590 (otherwise we'll have psym == NULL), and if we actually had a
2591 mangled name to begin with. */
2593 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2594 cases which do not set PSYM above? */
2596 if (cu
->language
== language_cplus
2597 && cu
->has_namespace_info
== 0
2599 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2600 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2603 if (built_actual_name
)
2604 xfree (actual_name
);
2607 /* Determine whether a die of type TAG living in a C++ class or
2608 namespace needs to have the name of the scope prepended to the
2609 name listed in the die. */
2612 pdi_needs_namespace (enum dwarf_tag tag
)
2616 case DW_TAG_namespace
:
2617 case DW_TAG_typedef
:
2618 case DW_TAG_class_type
:
2619 case DW_TAG_interface_type
:
2620 case DW_TAG_structure_type
:
2621 case DW_TAG_union_type
:
2622 case DW_TAG_enumeration_type
:
2623 case DW_TAG_enumerator
:
2630 /* Read a partial die corresponding to a namespace; also, add a symbol
2631 corresponding to that namespace to the symbol table. NAMESPACE is
2632 the name of the enclosing namespace. */
2635 add_partial_namespace (struct partial_die_info
*pdi
,
2636 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2637 int need_pc
, struct dwarf2_cu
*cu
)
2639 struct objfile
*objfile
= cu
->objfile
;
2641 /* Add a symbol for the namespace. */
2643 add_partial_symbol (pdi
, cu
);
2645 /* Now scan partial symbols in that namespace. */
2647 if (pdi
->has_children
)
2648 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2651 /* Read a partial die corresponding to a Fortran module. */
2654 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2655 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2657 /* Now scan partial symbols in that module.
2659 FIXME: Support the separate Fortran module namespaces. */
2661 if (pdi
->has_children
)
2662 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2665 /* Read a partial die corresponding to a subprogram and create a partial
2666 symbol for that subprogram. When the CU language allows it, this
2667 routine also defines a partial symbol for each nested subprogram
2668 that this subprogram contains.
2670 DIE my also be a lexical block, in which case we simply search
2671 recursively for suprograms defined inside that lexical block.
2672 Again, this is only performed when the CU language allows this
2673 type of definitions. */
2676 add_partial_subprogram (struct partial_die_info
*pdi
,
2677 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2678 int need_pc
, struct dwarf2_cu
*cu
)
2680 if (pdi
->tag
== DW_TAG_subprogram
)
2682 if (pdi
->has_pc_info
)
2684 if (pdi
->lowpc
< *lowpc
)
2685 *lowpc
= pdi
->lowpc
;
2686 if (pdi
->highpc
> *highpc
)
2687 *highpc
= pdi
->highpc
;
2691 struct objfile
*objfile
= cu
->objfile
;
2693 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2694 SECT_OFF_TEXT (objfile
));
2695 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2696 pdi
->lowpc
, pdi
->highpc
- 1,
2697 cu
->per_cu
->psymtab
);
2699 if (!pdi
->is_declaration
)
2700 add_partial_symbol (pdi
, cu
);
2704 if (! pdi
->has_children
)
2707 if (cu
->language
== language_ada
)
2709 pdi
= pdi
->die_child
;
2712 fixup_partial_die (pdi
, cu
);
2713 if (pdi
->tag
== DW_TAG_subprogram
2714 || pdi
->tag
== DW_TAG_lexical_block
)
2715 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2716 pdi
= pdi
->die_sibling
;
2721 /* See if we can figure out if the class lives in a namespace. We do
2722 this by looking for a member function; its demangled name will
2723 contain namespace info, if there is any. */
2726 guess_structure_name (struct partial_die_info
*struct_pdi
,
2727 struct dwarf2_cu
*cu
)
2729 if ((cu
->language
== language_cplus
2730 || cu
->language
== language_java
)
2731 && cu
->has_namespace_info
== 0
2732 && struct_pdi
->has_children
)
2734 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2735 what template types look like, because the demangler
2736 frequently doesn't give the same name as the debug info. We
2737 could fix this by only using the demangled name to get the
2738 prefix (but see comment in read_structure_type). */
2740 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2741 struct partial_die_info
*real_pdi
;
2743 /* If this DIE (this DIE's specification, if any) has a parent, then
2744 we should not do this. We'll prepend the parent's fully qualified
2745 name when we create the partial symbol. */
2747 real_pdi
= struct_pdi
;
2748 while (real_pdi
->has_specification
)
2749 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2751 if (real_pdi
->die_parent
!= NULL
)
2754 while (child_pdi
!= NULL
)
2756 if (child_pdi
->tag
== DW_TAG_subprogram
)
2758 char *actual_class_name
2759 = language_class_name_from_physname (cu
->language_defn
,
2761 if (actual_class_name
!= NULL
)
2764 = obsavestring (actual_class_name
,
2765 strlen (actual_class_name
),
2766 &cu
->comp_unit_obstack
);
2767 xfree (actual_class_name
);
2772 child_pdi
= child_pdi
->die_sibling
;
2777 /* Read a partial die corresponding to an enumeration type. */
2780 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2781 struct dwarf2_cu
*cu
)
2783 struct objfile
*objfile
= cu
->objfile
;
2784 bfd
*abfd
= objfile
->obfd
;
2785 struct partial_die_info
*pdi
;
2787 if (enum_pdi
->name
!= NULL
)
2788 add_partial_symbol (enum_pdi
, cu
);
2790 pdi
= enum_pdi
->die_child
;
2793 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2794 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2796 add_partial_symbol (pdi
, cu
);
2797 pdi
= pdi
->die_sibling
;
2801 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2802 Return the corresponding abbrev, or NULL if the number is zero (indicating
2803 an empty DIE). In either case *BYTES_READ will be set to the length of
2804 the initial number. */
2806 static struct abbrev_info
*
2807 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2808 struct dwarf2_cu
*cu
)
2810 bfd
*abfd
= cu
->objfile
->obfd
;
2811 unsigned int abbrev_number
;
2812 struct abbrev_info
*abbrev
;
2814 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2816 if (abbrev_number
== 0)
2819 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2822 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2823 bfd_get_filename (abfd
));
2829 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2830 Returns a pointer to the end of a series of DIEs, terminated by an empty
2831 DIE. Any children of the skipped DIEs will also be skipped. */
2834 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2836 struct abbrev_info
*abbrev
;
2837 unsigned int bytes_read
;
2841 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2843 return info_ptr
+ bytes_read
;
2845 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2849 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2850 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2851 abbrev corresponding to that skipped uleb128 should be passed in
2852 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2856 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2857 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2859 unsigned int bytes_read
;
2860 struct attribute attr
;
2861 bfd
*abfd
= cu
->objfile
->obfd
;
2862 unsigned int form
, i
;
2864 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2866 /* The only abbrev we care about is DW_AT_sibling. */
2867 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2869 read_attribute (&attr
, &abbrev
->attrs
[i
],
2870 abfd
, info_ptr
, cu
);
2871 if (attr
.form
== DW_FORM_ref_addr
)
2872 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2874 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2877 /* If it isn't DW_AT_sibling, skip this attribute. */
2878 form
= abbrev
->attrs
[i
].form
;
2883 case DW_FORM_ref_addr
:
2884 info_ptr
+= cu
->header
.addr_size
;
2904 case DW_FORM_string
:
2905 read_string (abfd
, info_ptr
, &bytes_read
);
2906 info_ptr
+= bytes_read
;
2909 info_ptr
+= cu
->header
.offset_size
;
2912 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2913 info_ptr
+= bytes_read
;
2915 case DW_FORM_block1
:
2916 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2918 case DW_FORM_block2
:
2919 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2921 case DW_FORM_block4
:
2922 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2926 case DW_FORM_ref_udata
:
2927 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2929 case DW_FORM_indirect
:
2930 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2931 info_ptr
+= bytes_read
;
2932 /* We need to continue parsing from here, so just go back to
2934 goto skip_attribute
;
2937 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2938 dwarf_form_name (form
),
2939 bfd_get_filename (abfd
));
2943 if (abbrev
->has_children
)
2944 return skip_children (buffer
, info_ptr
, cu
);
2949 /* Locate ORIG_PDI's sibling.
2950 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2954 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2955 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2956 bfd
*abfd
, struct dwarf2_cu
*cu
)
2958 /* Do we know the sibling already? */
2960 if (orig_pdi
->sibling
)
2961 return orig_pdi
->sibling
;
2963 /* Are there any children to deal with? */
2965 if (!orig_pdi
->has_children
)
2968 /* Skip the children the long way. */
2970 return skip_children (buffer
, info_ptr
, cu
);
2973 /* Expand this partial symbol table into a full symbol table. */
2976 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2978 /* FIXME: This is barely more than a stub. */
2983 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2989 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2990 gdb_flush (gdb_stdout
);
2993 /* Restore our global data. */
2994 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2995 dwarf2_objfile_data_key
);
2997 /* If this psymtab is constructed from a debug-only objfile, the
2998 has_section_at_zero flag will not necessarily be correct. We
2999 can get the correct value for this flag by looking at the data
3000 associated with the (presumably stripped) associated objfile. */
3001 if (pst
->objfile
->separate_debug_objfile_backlink
)
3003 struct dwarf2_per_objfile
*dpo_backlink
3004 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
3005 dwarf2_objfile_data_key
);
3006 dwarf2_per_objfile
->has_section_at_zero
3007 = dpo_backlink
->has_section_at_zero
;
3010 psymtab_to_symtab_1 (pst
);
3012 /* Finish up the debug error message. */
3014 printf_filtered (_("done.\n"));
3019 /* Add PER_CU to the queue. */
3022 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3024 struct dwarf2_queue_item
*item
;
3027 item
= xmalloc (sizeof (*item
));
3028 item
->per_cu
= per_cu
;
3031 if (dwarf2_queue
== NULL
)
3032 dwarf2_queue
= item
;
3034 dwarf2_queue_tail
->next
= item
;
3036 dwarf2_queue_tail
= item
;
3039 /* Process the queue. */
3042 process_queue (struct objfile
*objfile
)
3044 struct dwarf2_queue_item
*item
, *next_item
;
3046 /* The queue starts out with one item, but following a DIE reference
3047 may load a new CU, adding it to the end of the queue. */
3048 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
3050 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
3051 process_full_comp_unit (item
->per_cu
);
3053 item
->per_cu
->queued
= 0;
3054 next_item
= item
->next
;
3058 dwarf2_queue_tail
= NULL
;
3061 /* Free all allocated queue entries. This function only releases anything if
3062 an error was thrown; if the queue was processed then it would have been
3063 freed as we went along. */
3066 dwarf2_release_queue (void *dummy
)
3068 struct dwarf2_queue_item
*item
, *last
;
3070 item
= dwarf2_queue
;
3073 /* Anything still marked queued is likely to be in an
3074 inconsistent state, so discard it. */
3075 if (item
->per_cu
->queued
)
3077 if (item
->per_cu
->cu
!= NULL
)
3078 free_one_cached_comp_unit (item
->per_cu
->cu
);
3079 item
->per_cu
->queued
= 0;
3087 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3090 /* Read in full symbols for PST, and anything it depends on. */
3093 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3095 struct dwarf2_per_cu_data
*per_cu
;
3096 struct cleanup
*back_to
;
3099 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3100 if (!pst
->dependencies
[i
]->readin
)
3102 /* Inform about additional files that need to be read in. */
3105 /* FIXME: i18n: Need to make this a single string. */
3106 fputs_filtered (" ", gdb_stdout
);
3108 fputs_filtered ("and ", gdb_stdout
);
3110 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3111 wrap_here (""); /* Flush output */
3112 gdb_flush (gdb_stdout
);
3114 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3117 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
3121 /* It's an include file, no symbols to read for it.
3122 Everything is in the parent symtab. */
3127 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3129 queue_comp_unit (per_cu
, pst
->objfile
);
3131 if (per_cu
->from_debug_types
)
3132 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3134 load_full_comp_unit (per_cu
, pst
->objfile
);
3136 process_queue (pst
->objfile
);
3138 /* Age the cache, releasing compilation units that have not
3139 been used recently. */
3140 age_cached_comp_units ();
3142 do_cleanups (back_to
);
3145 /* Load the DIEs associated with PER_CU into memory. */
3148 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3150 bfd
*abfd
= objfile
->obfd
;
3151 struct dwarf2_cu
*cu
;
3152 unsigned int offset
;
3153 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3154 struct cleanup
*back_to
, *free_cu_cleanup
;
3155 struct attribute
*attr
;
3158 gdb_assert (! per_cu
->from_debug_types
);
3160 /* Set local variables from the partial symbol table info. */
3161 offset
= per_cu
->offset
;
3163 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3164 beg_of_comp_unit
= info_ptr
;
3166 cu
= alloc_one_comp_unit (objfile
);
3168 /* If an error occurs while loading, release our storage. */
3169 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3171 /* Read in the comp_unit header. */
3172 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3174 /* Complete the cu_header. */
3175 cu
->header
.offset
= offset
;
3176 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3178 /* Read the abbrevs for this compilation unit. */
3179 dwarf2_read_abbrevs (abfd
, cu
);
3180 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3182 /* Link this compilation unit into the compilation unit tree. */
3184 cu
->per_cu
= per_cu
;
3185 cu
->type_hash
= per_cu
->type_hash
;
3187 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3189 /* We try not to read any attributes in this function, because not
3190 all objfiles needed for references have been loaded yet, and symbol
3191 table processing isn't initialized. But we have to set the CU language,
3192 or we won't be able to build types correctly. */
3193 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3195 set_cu_language (DW_UNSND (attr
), cu
);
3197 set_cu_language (language_minimal
, cu
);
3199 /* Link this CU into read_in_chain. */
3200 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3201 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3203 do_cleanups (back_to
);
3205 /* We've successfully allocated this compilation unit. Let our caller
3206 clean it up when finished with it. */
3207 discard_cleanups (free_cu_cleanup
);
3210 /* Generate full symbol information for PST and CU, whose DIEs have
3211 already been loaded into memory. */
3214 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3216 struct partial_symtab
*pst
= per_cu
->psymtab
;
3217 struct dwarf2_cu
*cu
= per_cu
->cu
;
3218 struct objfile
*objfile
= pst
->objfile
;
3219 bfd
*abfd
= objfile
->obfd
;
3220 CORE_ADDR lowpc
, highpc
;
3221 struct symtab
*symtab
;
3222 struct cleanup
*back_to
;
3225 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3228 back_to
= make_cleanup (really_free_pendings
, NULL
);
3230 cu
->list_in_scope
= &file_symbols
;
3232 dwarf2_find_base_address (cu
->dies
, cu
);
3234 /* Do line number decoding in read_file_scope () */
3235 process_die (cu
->dies
, cu
);
3237 /* Some compilers don't define a DW_AT_high_pc attribute for the
3238 compilation unit. If the DW_AT_high_pc is missing, synthesize
3239 it, by scanning the DIE's below the compilation unit. */
3240 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3242 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3244 /* Set symtab language to language from DW_AT_language.
3245 If the compilation is from a C file generated by language preprocessors,
3246 do not set the language if it was already deduced by start_subfile. */
3248 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3250 symtab
->language
= cu
->language
;
3252 pst
->symtab
= symtab
;
3255 do_cleanups (back_to
);
3258 /* Process a die and its children. */
3261 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3265 case DW_TAG_padding
:
3267 case DW_TAG_compile_unit
:
3268 read_file_scope (die
, cu
);
3270 case DW_TAG_type_unit
:
3271 read_type_unit_scope (die
, cu
);
3273 case DW_TAG_subprogram
:
3274 case DW_TAG_inlined_subroutine
:
3275 read_func_scope (die
, cu
);
3277 case DW_TAG_lexical_block
:
3278 case DW_TAG_try_block
:
3279 case DW_TAG_catch_block
:
3280 read_lexical_block_scope (die
, cu
);
3282 case DW_TAG_class_type
:
3283 case DW_TAG_interface_type
:
3284 case DW_TAG_structure_type
:
3285 case DW_TAG_union_type
:
3286 process_structure_scope (die
, cu
);
3288 case DW_TAG_enumeration_type
:
3289 process_enumeration_scope (die
, cu
);
3292 /* These dies have a type, but processing them does not create
3293 a symbol or recurse to process the children. Therefore we can
3294 read them on-demand through read_type_die. */
3295 case DW_TAG_subroutine_type
:
3296 case DW_TAG_set_type
:
3297 case DW_TAG_array_type
:
3298 case DW_TAG_pointer_type
:
3299 case DW_TAG_ptr_to_member_type
:
3300 case DW_TAG_reference_type
:
3301 case DW_TAG_string_type
:
3304 case DW_TAG_base_type
:
3305 case DW_TAG_subrange_type
:
3306 case DW_TAG_typedef
:
3307 /* Add a typedef symbol for the type definition, if it has a
3309 new_symbol (die
, read_type_die (die
, cu
), cu
);
3311 case DW_TAG_common_block
:
3312 read_common_block (die
, cu
);
3314 case DW_TAG_common_inclusion
:
3316 case DW_TAG_namespace
:
3317 processing_has_namespace_info
= 1;
3318 read_namespace (die
, cu
);
3321 read_module (die
, cu
);
3323 case DW_TAG_imported_declaration
:
3324 case DW_TAG_imported_module
:
3325 processing_has_namespace_info
= 1;
3326 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3327 || cu
->language
!= language_fortran
))
3328 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3329 dwarf_tag_name (die
->tag
));
3330 read_import_statement (die
, cu
);
3333 new_symbol (die
, NULL
, cu
);
3338 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3339 If scope qualifiers are appropriate they will be added. The result
3340 will be allocated on the objfile_obstack, or NULL if the DIE does
3344 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3346 struct attribute
*attr
;
3347 char *prefix
, *name
;
3348 struct ui_file
*buf
= NULL
;
3350 name
= dwarf2_name (die
, cu
);
3354 /* These are the only languages we know how to qualify names in. */
3355 if (cu
->language
!= language_cplus
3356 && cu
->language
!= language_java
)
3359 /* If no prefix is necessary for this type of DIE, return the
3360 unqualified name. The other three tags listed could be handled
3361 in pdi_needs_namespace, but that requires broader changes. */
3362 if (!pdi_needs_namespace (die
->tag
)
3363 && die
->tag
!= DW_TAG_subprogram
3364 && die
->tag
!= DW_TAG_variable
3365 && die
->tag
!= DW_TAG_member
)
3368 prefix
= determine_prefix (die
, cu
);
3369 if (*prefix
!= '\0')
3370 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3376 /* Read the import statement specified by the given die and record it. */
3379 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3381 struct attribute
*import_attr
;
3382 struct die_info
*imported_die
;
3383 struct dwarf2_cu
*imported_cu
;
3384 const char *imported_name
;
3385 const char *imported_name_prefix
;
3386 const char *import_prefix
;
3387 char *canonical_name
;
3389 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3390 if (import_attr
== NULL
)
3392 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3393 dwarf_tag_name (die
->tag
));
3398 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3399 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3400 if (imported_name
== NULL
)
3402 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3404 The import in the following code:
3418 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3419 <52> DW_AT_decl_file : 1
3420 <53> DW_AT_decl_line : 6
3421 <54> DW_AT_import : <0x75>
3422 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3424 <5b> DW_AT_decl_file : 1
3425 <5c> DW_AT_decl_line : 2
3426 <5d> DW_AT_type : <0x6e>
3428 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3429 <76> DW_AT_byte_size : 4
3430 <77> DW_AT_encoding : 5 (signed)
3432 imports the wrong die ( 0x75 instead of 0x58 ).
3433 This case will be ignored until the gcc bug is fixed. */
3437 /* FIXME: dwarf2_name (die); for the local name after import. */
3439 /* Figure out where the statement is being imported to. */
3440 import_prefix
= determine_prefix (die
, cu
);
3442 /* Figure out what the scope of the imported die is and prepend it
3443 to the name of the imported die. */
3444 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3446 if (strlen (imported_name_prefix
) > 0)
3448 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3449 strcpy (canonical_name
, imported_name_prefix
);
3450 strcat (canonical_name
, "::");
3451 strcat (canonical_name
, imported_name
);
3455 canonical_name
= alloca (strlen (imported_name
) + 1);
3456 strcpy (canonical_name
, imported_name
);
3459 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3463 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3465 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3469 free_cu_line_header (void *arg
)
3471 struct dwarf2_cu
*cu
= arg
;
3473 free_line_header (cu
->line_header
);
3474 cu
->line_header
= NULL
;
3478 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3480 struct objfile
*objfile
= cu
->objfile
;
3481 struct comp_unit_head
*cu_header
= &cu
->header
;
3482 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3483 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3484 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3485 struct attribute
*attr
;
3487 char *comp_dir
= NULL
;
3488 struct die_info
*child_die
;
3489 bfd
*abfd
= objfile
->obfd
;
3490 struct line_header
*line_header
= 0;
3493 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3495 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3497 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3498 from finish_block. */
3499 if (lowpc
== ((CORE_ADDR
) -1))
3504 /* Find the filename. Do not use dwarf2_name here, since the filename
3505 is not a source language identifier. */
3506 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3509 name
= DW_STRING (attr
);
3512 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3514 comp_dir
= DW_STRING (attr
);
3515 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3517 comp_dir
= ldirname (name
);
3518 if (comp_dir
!= NULL
)
3519 make_cleanup (xfree
, comp_dir
);
3521 if (comp_dir
!= NULL
)
3523 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3524 directory, get rid of it. */
3525 char *cp
= strchr (comp_dir
, ':');
3527 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3534 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3537 set_cu_language (DW_UNSND (attr
), cu
);
3540 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3542 cu
->producer
= DW_STRING (attr
);
3544 /* We assume that we're processing GCC output. */
3545 processing_gcc_compilation
= 2;
3547 processing_has_namespace_info
= 0;
3549 start_symtab (name
, comp_dir
, lowpc
);
3550 record_debugformat ("DWARF 2");
3551 record_producer (cu
->producer
);
3553 initialize_cu_func_list (cu
);
3555 /* Decode line number information if present. We do this before
3556 processing child DIEs, so that the line header table is available
3557 for DW_AT_decl_file. */
3558 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3561 unsigned int line_offset
= DW_UNSND (attr
);
3562 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3565 cu
->line_header
= line_header
;
3566 make_cleanup (free_cu_line_header
, cu
);
3567 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3571 /* Process all dies in compilation unit. */
3572 if (die
->child
!= NULL
)
3574 child_die
= die
->child
;
3575 while (child_die
&& child_die
->tag
)
3577 process_die (child_die
, cu
);
3578 child_die
= sibling_die (child_die
);
3582 /* Decode macro information, if present. Dwarf 2 macro information
3583 refers to information in the line number info statement program
3584 header, so we can only read it if we've read the header
3586 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3587 if (attr
&& line_header
)
3589 unsigned int macro_offset
= DW_UNSND (attr
);
3590 dwarf_decode_macros (line_header
, macro_offset
,
3591 comp_dir
, abfd
, cu
);
3593 do_cleanups (back_to
);
3596 /* For TUs we want to skip the first top level sibling if it's not the
3597 actual type being defined by this TU. In this case the first top
3598 level sibling is there to provide context only. */
3601 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3603 struct objfile
*objfile
= cu
->objfile
;
3604 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3606 struct attribute
*attr
;
3608 char *comp_dir
= NULL
;
3609 struct die_info
*child_die
;
3610 bfd
*abfd
= objfile
->obfd
;
3611 struct line_header
*line_header
= 0;
3613 /* start_symtab needs a low pc, but we don't really have one.
3614 Do what read_file_scope would do in the absence of such info. */
3615 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3617 /* Find the filename. Do not use dwarf2_name here, since the filename
3618 is not a source language identifier. */
3619 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3621 name
= DW_STRING (attr
);
3623 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3625 comp_dir
= DW_STRING (attr
);
3626 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3628 comp_dir
= ldirname (name
);
3629 if (comp_dir
!= NULL
)
3630 make_cleanup (xfree
, comp_dir
);
3636 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3638 set_cu_language (DW_UNSND (attr
), cu
);
3640 /* This isn't technically needed today. It is done for symmetry
3641 with read_file_scope. */
3642 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3644 cu
->producer
= DW_STRING (attr
);
3646 /* We assume that we're processing GCC output. */
3647 processing_gcc_compilation
= 2;
3649 processing_has_namespace_info
= 0;
3651 start_symtab (name
, comp_dir
, lowpc
);
3652 record_debugformat ("DWARF 2");
3653 record_producer (cu
->producer
);
3655 /* Process the dies in the type unit. */
3656 if (die
->child
== NULL
)
3658 dump_die_for_error (die
);
3659 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3660 bfd_get_filename (abfd
));
3663 child_die
= die
->child
;
3665 while (child_die
&& child_die
->tag
)
3667 process_die (child_die
, cu
);
3669 child_die
= sibling_die (child_die
);
3672 do_cleanups (back_to
);
3676 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3677 struct dwarf2_cu
*cu
)
3679 struct function_range
*thisfn
;
3681 thisfn
= (struct function_range
*)
3682 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3683 thisfn
->name
= name
;
3684 thisfn
->lowpc
= lowpc
;
3685 thisfn
->highpc
= highpc
;
3686 thisfn
->seen_line
= 0;
3687 thisfn
->next
= NULL
;
3689 if (cu
->last_fn
== NULL
)
3690 cu
->first_fn
= thisfn
;
3692 cu
->last_fn
->next
= thisfn
;
3694 cu
->last_fn
= thisfn
;
3697 /* qsort helper for inherit_abstract_dies. */
3700 unsigned_int_compar (const void *ap
, const void *bp
)
3702 unsigned int a
= *(unsigned int *) ap
;
3703 unsigned int b
= *(unsigned int *) bp
;
3705 return (a
> b
) - (b
> a
);
3708 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3709 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3710 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3713 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3715 struct die_info
*child_die
;
3716 unsigned die_children_count
;
3717 /* CU offsets which were referenced by children of the current DIE. */
3719 unsigned *offsets_end
, *offsetp
;
3720 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3721 struct die_info
*origin_die
;
3722 /* Iterator of the ORIGIN_DIE children. */
3723 struct die_info
*origin_child_die
;
3724 struct cleanup
*cleanups
;
3725 struct attribute
*attr
;
3727 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3731 origin_die
= follow_die_ref (die
, attr
, &cu
);
3732 if (die
->tag
!= origin_die
->tag
3733 && !(die
->tag
== DW_TAG_inlined_subroutine
3734 && origin_die
->tag
== DW_TAG_subprogram
))
3735 complaint (&symfile_complaints
,
3736 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3737 die
->offset
, origin_die
->offset
);
3739 child_die
= die
->child
;
3740 die_children_count
= 0;
3741 while (child_die
&& child_die
->tag
)
3743 child_die
= sibling_die (child_die
);
3744 die_children_count
++;
3746 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3747 cleanups
= make_cleanup (xfree
, offsets
);
3749 offsets_end
= offsets
;
3750 child_die
= die
->child
;
3751 while (child_die
&& child_die
->tag
)
3753 /* For each CHILD_DIE, find the corresponding child of
3754 ORIGIN_DIE. If there is more than one layer of
3755 DW_AT_abstract_origin, follow them all; there shouldn't be,
3756 but GCC versions at least through 4.4 generate this (GCC PR
3758 struct die_info
*child_origin_die
= child_die
;
3761 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3764 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3767 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3768 counterpart may exist. */
3769 if (child_origin_die
!= child_die
)
3771 if (child_die
->tag
!= child_origin_die
->tag
3772 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3773 && child_origin_die
->tag
== DW_TAG_subprogram
))
3774 complaint (&symfile_complaints
,
3775 _("Child DIE 0x%x and its abstract origin 0x%x have "
3776 "different tags"), child_die
->offset
,
3777 child_origin_die
->offset
);
3778 if (child_origin_die
->parent
!= origin_die
)
3779 complaint (&symfile_complaints
,
3780 _("Child DIE 0x%x and its abstract origin 0x%x have "
3781 "different parents"), child_die
->offset
,
3782 child_origin_die
->offset
);
3784 *offsets_end
++ = child_origin_die
->offset
;
3786 child_die
= sibling_die (child_die
);
3788 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3789 unsigned_int_compar
);
3790 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3791 if (offsetp
[-1] == *offsetp
)
3792 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3793 "to DIE 0x%x as their abstract origin"),
3794 die
->offset
, *offsetp
);
3797 origin_child_die
= origin_die
->child
;
3798 while (origin_child_die
&& origin_child_die
->tag
)
3800 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3801 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3803 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3805 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3806 process_die (origin_child_die
, cu
);
3808 origin_child_die
= sibling_die (origin_child_die
);
3811 do_cleanups (cleanups
);
3815 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3817 struct objfile
*objfile
= cu
->objfile
;
3818 struct context_stack
*new;
3821 struct die_info
*child_die
;
3822 struct attribute
*attr
, *call_line
, *call_file
;
3825 struct block
*block
;
3826 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3830 /* If we do not have call site information, we can't show the
3831 caller of this inlined function. That's too confusing, so
3832 only use the scope for local variables. */
3833 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3834 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3835 if (call_line
== NULL
|| call_file
== NULL
)
3837 read_lexical_block_scope (die
, cu
);
3842 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3844 name
= dwarf2_linkage_name (die
, cu
);
3846 /* Ignore functions with missing or empty names and functions with
3847 missing or invalid low and high pc attributes. */
3848 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3854 /* Record the function range for dwarf_decode_lines. */
3855 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3857 new = push_context (0, lowpc
);
3858 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3860 /* If there is a location expression for DW_AT_frame_base, record
3862 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3864 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3865 expression is being recorded directly in the function's symbol
3866 and not in a separate frame-base object. I guess this hack is
3867 to avoid adding some sort of frame-base adjunct/annex to the
3868 function's symbol :-(. The problem with doing this is that it
3869 results in a function symbol with a location expression that
3870 has nothing to do with the location of the function, ouch! The
3871 relationship should be: a function's symbol has-a frame base; a
3872 frame-base has-a location expression. */
3873 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3875 cu
->list_in_scope
= &local_symbols
;
3877 if (die
->child
!= NULL
)
3879 child_die
= die
->child
;
3880 while (child_die
&& child_die
->tag
)
3882 process_die (child_die
, cu
);
3883 child_die
= sibling_die (child_die
);
3887 inherit_abstract_dies (die
, cu
);
3889 new = pop_context ();
3890 /* Make a block for the local symbols within. */
3891 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3892 lowpc
, highpc
, objfile
);
3894 /* For C++, set the block's scope. */
3895 if (cu
->language
== language_cplus
)
3896 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3897 determine_prefix (die
, cu
),
3898 processing_has_namespace_info
);
3900 /* If we have address ranges, record them. */
3901 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3903 /* In C++, we can have functions nested inside functions (e.g., when
3904 a function declares a class that has methods). This means that
3905 when we finish processing a function scope, we may need to go
3906 back to building a containing block's symbol lists. */
3907 local_symbols
= new->locals
;
3908 param_symbols
= new->params
;
3909 using_directives
= new->using_directives
;
3911 /* If we've finished processing a top-level function, subsequent
3912 symbols go in the file symbol list. */
3913 if (outermost_context_p ())
3914 cu
->list_in_scope
= &file_symbols
;
3917 /* Process all the DIES contained within a lexical block scope. Start
3918 a new scope, process the dies, and then close the scope. */
3921 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3923 struct objfile
*objfile
= cu
->objfile
;
3924 struct context_stack
*new;
3925 CORE_ADDR lowpc
, highpc
;
3926 struct die_info
*child_die
;
3929 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3931 /* Ignore blocks with missing or invalid low and high pc attributes. */
3932 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3933 as multiple lexical blocks? Handling children in a sane way would
3934 be nasty. Might be easier to properly extend generic blocks to
3936 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3941 push_context (0, lowpc
);
3942 if (die
->child
!= NULL
)
3944 child_die
= die
->child
;
3945 while (child_die
&& child_die
->tag
)
3947 process_die (child_die
, cu
);
3948 child_die
= sibling_die (child_die
);
3951 new = pop_context ();
3953 if (local_symbols
!= NULL
)
3956 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3959 /* Note that recording ranges after traversing children, as we
3960 do here, means that recording a parent's ranges entails
3961 walking across all its children's ranges as they appear in
3962 the address map, which is quadratic behavior.
3964 It would be nicer to record the parent's ranges before
3965 traversing its children, simply overriding whatever you find
3966 there. But since we don't even decide whether to create a
3967 block until after we've traversed its children, that's hard
3969 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3971 local_symbols
= new->locals
;
3972 using_directives
= new->using_directives
;
3975 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3976 Return 1 if the attributes are present and valid, otherwise, return 0.
3977 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3980 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3981 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3982 struct partial_symtab
*ranges_pst
)
3984 struct objfile
*objfile
= cu
->objfile
;
3985 struct comp_unit_head
*cu_header
= &cu
->header
;
3986 bfd
*obfd
= objfile
->obfd
;
3987 unsigned int addr_size
= cu_header
->addr_size
;
3988 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3989 /* Base address selection entry. */
4000 found_base
= cu
->base_known
;
4001 base
= cu
->base_address
;
4003 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4005 complaint (&symfile_complaints
,
4006 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4010 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4012 /* Read in the largest possible address. */
4013 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4014 if ((marker
& mask
) == mask
)
4016 /* If we found the largest possible address, then
4017 read the base address. */
4018 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4019 buffer
+= 2 * addr_size
;
4020 offset
+= 2 * addr_size
;
4026 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4030 CORE_ADDR range_beginning
, range_end
;
4032 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4033 buffer
+= addr_size
;
4034 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4035 buffer
+= addr_size
;
4036 offset
+= 2 * addr_size
;
4038 /* An end of list marker is a pair of zero addresses. */
4039 if (range_beginning
== 0 && range_end
== 0)
4040 /* Found the end of list entry. */
4043 /* Each base address selection entry is a pair of 2 values.
4044 The first is the largest possible address, the second is
4045 the base address. Check for a base address here. */
4046 if ((range_beginning
& mask
) == mask
)
4048 /* If we found the largest possible address, then
4049 read the base address. */
4050 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4057 /* We have no valid base address for the ranges
4059 complaint (&symfile_complaints
,
4060 _("Invalid .debug_ranges data (no base address)"));
4064 range_beginning
+= base
;
4067 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4068 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4069 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4072 /* FIXME: This is recording everything as a low-high
4073 segment of consecutive addresses. We should have a
4074 data structure for discontiguous block ranges
4078 low
= range_beginning
;
4084 if (range_beginning
< low
)
4085 low
= range_beginning
;
4086 if (range_end
> high
)
4092 /* If the first entry is an end-of-list marker, the range
4093 describes an empty scope, i.e. no instructions. */
4099 *high_return
= high
;
4103 /* Get low and high pc attributes from a die. Return 1 if the attributes
4104 are present and valid, otherwise, return 0. Return -1 if the range is
4105 discontinuous, i.e. derived from DW_AT_ranges information. */
4107 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4108 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4109 struct partial_symtab
*pst
)
4111 struct attribute
*attr
;
4116 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4119 high
= DW_ADDR (attr
);
4120 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4122 low
= DW_ADDR (attr
);
4124 /* Found high w/o low attribute. */
4127 /* Found consecutive range of addresses. */
4132 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4135 /* Value of the DW_AT_ranges attribute is the offset in the
4136 .debug_ranges section. */
4137 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4139 /* Found discontinuous range of addresses. */
4147 /* When using the GNU linker, .gnu.linkonce. sections are used to
4148 eliminate duplicate copies of functions and vtables and such.
4149 The linker will arbitrarily choose one and discard the others.
4150 The AT_*_pc values for such functions refer to local labels in
4151 these sections. If the section from that file was discarded, the
4152 labels are not in the output, so the relocs get a value of 0.
4153 If this is a discarded function, mark the pc bounds as invalid,
4154 so that GDB will ignore it. */
4155 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4163 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4164 its low and high PC addresses. Do nothing if these addresses could not
4165 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4166 and HIGHPC to the high address if greater than HIGHPC. */
4169 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4170 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4171 struct dwarf2_cu
*cu
)
4173 CORE_ADDR low
, high
;
4174 struct die_info
*child
= die
->child
;
4176 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4178 *lowpc
= min (*lowpc
, low
);
4179 *highpc
= max (*highpc
, high
);
4182 /* If the language does not allow nested subprograms (either inside
4183 subprograms or lexical blocks), we're done. */
4184 if (cu
->language
!= language_ada
)
4187 /* Check all the children of the given DIE. If it contains nested
4188 subprograms, then check their pc bounds. Likewise, we need to
4189 check lexical blocks as well, as they may also contain subprogram
4191 while (child
&& child
->tag
)
4193 if (child
->tag
== DW_TAG_subprogram
4194 || child
->tag
== DW_TAG_lexical_block
)
4195 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4196 child
= sibling_die (child
);
4200 /* Get the low and high pc's represented by the scope DIE, and store
4201 them in *LOWPC and *HIGHPC. If the correct values can't be
4202 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4205 get_scope_pc_bounds (struct die_info
*die
,
4206 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4207 struct dwarf2_cu
*cu
)
4209 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4210 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4211 CORE_ADDR current_low
, current_high
;
4213 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4215 best_low
= current_low
;
4216 best_high
= current_high
;
4220 struct die_info
*child
= die
->child
;
4222 while (child
&& child
->tag
)
4224 switch (child
->tag
) {
4225 case DW_TAG_subprogram
:
4226 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4228 case DW_TAG_namespace
:
4229 /* FIXME: carlton/2004-01-16: Should we do this for
4230 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4231 that current GCC's always emit the DIEs corresponding
4232 to definitions of methods of classes as children of a
4233 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4234 the DIEs giving the declarations, which could be
4235 anywhere). But I don't see any reason why the
4236 standards says that they have to be there. */
4237 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4239 if (current_low
!= ((CORE_ADDR
) -1))
4241 best_low
= min (best_low
, current_low
);
4242 best_high
= max (best_high
, current_high
);
4250 child
= sibling_die (child
);
4255 *highpc
= best_high
;
4258 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4261 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4262 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4264 struct attribute
*attr
;
4266 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4269 CORE_ADDR high
= DW_ADDR (attr
);
4270 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4273 CORE_ADDR low
= DW_ADDR (attr
);
4274 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4278 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4281 bfd
*obfd
= cu
->objfile
->obfd
;
4283 /* The value of the DW_AT_ranges attribute is the offset of the
4284 address range list in the .debug_ranges section. */
4285 unsigned long offset
= DW_UNSND (attr
);
4286 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4288 /* For some target architectures, but not others, the
4289 read_address function sign-extends the addresses it returns.
4290 To recognize base address selection entries, we need a
4292 unsigned int addr_size
= cu
->header
.addr_size
;
4293 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4295 /* The base address, to which the next pair is relative. Note
4296 that this 'base' is a DWARF concept: most entries in a range
4297 list are relative, to reduce the number of relocs against the
4298 debugging information. This is separate from this function's
4299 'baseaddr' argument, which GDB uses to relocate debugging
4300 information from a shared library based on the address at
4301 which the library was loaded. */
4302 CORE_ADDR base
= cu
->base_address
;
4303 int base_known
= cu
->base_known
;
4305 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4307 complaint (&symfile_complaints
,
4308 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4315 unsigned int bytes_read
;
4316 CORE_ADDR start
, end
;
4318 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4319 buffer
+= bytes_read
;
4320 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4321 buffer
+= bytes_read
;
4323 /* Did we find the end of the range list? */
4324 if (start
== 0 && end
== 0)
4327 /* Did we find a base address selection entry? */
4328 else if ((start
& base_select_mask
) == base_select_mask
)
4334 /* We found an ordinary address range. */
4339 complaint (&symfile_complaints
,
4340 _("Invalid .debug_ranges data (no base address)"));
4344 record_block_range (block
,
4345 baseaddr
+ base
+ start
,
4346 baseaddr
+ base
+ end
- 1);
4352 /* Add an aggregate field to the field list. */
4355 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4356 struct dwarf2_cu
*cu
)
4358 struct objfile
*objfile
= cu
->objfile
;
4359 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4360 struct nextfield
*new_field
;
4361 struct attribute
*attr
;
4363 char *fieldname
= "";
4365 /* Allocate a new field list entry and link it in. */
4366 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4367 make_cleanup (xfree
, new_field
);
4368 memset (new_field
, 0, sizeof (struct nextfield
));
4370 if (die
->tag
== DW_TAG_inheritance
)
4372 new_field
->next
= fip
->baseclasses
;
4373 fip
->baseclasses
= new_field
;
4377 new_field
->next
= fip
->fields
;
4378 fip
->fields
= new_field
;
4382 /* Handle accessibility and virtuality of field.
4383 The default accessibility for members is public, the default
4384 accessibility for inheritance is private. */
4385 if (die
->tag
!= DW_TAG_inheritance
)
4386 new_field
->accessibility
= DW_ACCESS_public
;
4388 new_field
->accessibility
= DW_ACCESS_private
;
4389 new_field
->virtuality
= DW_VIRTUALITY_none
;
4391 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4393 new_field
->accessibility
= DW_UNSND (attr
);
4394 if (new_field
->accessibility
!= DW_ACCESS_public
)
4395 fip
->non_public_fields
= 1;
4396 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4398 new_field
->virtuality
= DW_UNSND (attr
);
4400 fp
= &new_field
->field
;
4402 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4404 /* Data member other than a C++ static data member. */
4406 /* Get type of field. */
4407 fp
->type
= die_type (die
, cu
);
4409 SET_FIELD_BITPOS (*fp
, 0);
4411 /* Get bit size of field (zero if none). */
4412 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4415 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4419 FIELD_BITSIZE (*fp
) = 0;
4422 /* Get bit offset of field. */
4423 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4426 int byte_offset
= 0;
4428 if (attr_form_is_section_offset (attr
))
4429 dwarf2_complex_location_expr_complaint ();
4430 else if (attr_form_is_constant (attr
))
4431 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4432 else if (attr_form_is_block (attr
))
4433 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4435 dwarf2_complex_location_expr_complaint ();
4437 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4439 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4442 if (gdbarch_bits_big_endian (gdbarch
))
4444 /* For big endian bits, the DW_AT_bit_offset gives the
4445 additional bit offset from the MSB of the containing
4446 anonymous object to the MSB of the field. We don't
4447 have to do anything special since we don't need to
4448 know the size of the anonymous object. */
4449 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4453 /* For little endian bits, compute the bit offset to the
4454 MSB of the anonymous object, subtract off the number of
4455 bits from the MSB of the field to the MSB of the
4456 object, and then subtract off the number of bits of
4457 the field itself. The result is the bit offset of
4458 the LSB of the field. */
4460 int bit_offset
= DW_UNSND (attr
);
4462 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4465 /* The size of the anonymous object containing
4466 the bit field is explicit, so use the
4467 indicated size (in bytes). */
4468 anonymous_size
= DW_UNSND (attr
);
4472 /* The size of the anonymous object containing
4473 the bit field must be inferred from the type
4474 attribute of the data member containing the
4476 anonymous_size
= TYPE_LENGTH (fp
->type
);
4478 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4479 - bit_offset
- FIELD_BITSIZE (*fp
);
4483 /* Get name of field. */
4484 fieldname
= dwarf2_name (die
, cu
);
4485 if (fieldname
== NULL
)
4488 /* The name is already allocated along with this objfile, so we don't
4489 need to duplicate it for the type. */
4490 fp
->name
= fieldname
;
4492 /* Change accessibility for artificial fields (e.g. virtual table
4493 pointer or virtual base class pointer) to private. */
4494 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4496 FIELD_ARTIFICIAL (*fp
) = 1;
4497 new_field
->accessibility
= DW_ACCESS_private
;
4498 fip
->non_public_fields
= 1;
4501 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4503 /* C++ static member. */
4505 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4506 is a declaration, but all versions of G++ as of this writing
4507 (so through at least 3.2.1) incorrectly generate
4508 DW_TAG_variable tags. */
4512 /* Get name of field. */
4513 fieldname
= dwarf2_name (die
, cu
);
4514 if (fieldname
== NULL
)
4517 /* Get physical name. */
4518 physname
= dwarf2_linkage_name (die
, cu
);
4520 /* The name is already allocated along with this objfile, so we don't
4521 need to duplicate it for the type. */
4522 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4523 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4524 FIELD_NAME (*fp
) = fieldname
;
4526 else if (die
->tag
== DW_TAG_inheritance
)
4528 /* C++ base class field. */
4529 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4532 int byte_offset
= 0;
4534 if (attr_form_is_section_offset (attr
))
4535 dwarf2_complex_location_expr_complaint ();
4536 else if (attr_form_is_constant (attr
))
4537 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4538 else if (attr_form_is_block (attr
))
4539 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4541 dwarf2_complex_location_expr_complaint ();
4543 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4545 FIELD_BITSIZE (*fp
) = 0;
4546 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4547 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4548 fip
->nbaseclasses
++;
4552 /* Create the vector of fields, and attach it to the type. */
4555 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4556 struct dwarf2_cu
*cu
)
4558 int nfields
= fip
->nfields
;
4560 /* Record the field count, allocate space for the array of fields,
4561 and create blank accessibility bitfields if necessary. */
4562 TYPE_NFIELDS (type
) = nfields
;
4563 TYPE_FIELDS (type
) = (struct field
*)
4564 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4565 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4567 if (fip
->non_public_fields
)
4569 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4571 TYPE_FIELD_PRIVATE_BITS (type
) =
4572 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4573 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4575 TYPE_FIELD_PROTECTED_BITS (type
) =
4576 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4577 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4579 TYPE_FIELD_IGNORE_BITS (type
) =
4580 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4581 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4584 /* If the type has baseclasses, allocate and clear a bit vector for
4585 TYPE_FIELD_VIRTUAL_BITS. */
4586 if (fip
->nbaseclasses
)
4588 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4589 unsigned char *pointer
;
4591 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4592 pointer
= TYPE_ALLOC (type
, num_bytes
);
4593 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4594 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4595 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4598 /* Copy the saved-up fields into the field vector. Start from the head
4599 of the list, adding to the tail of the field array, so that they end
4600 up in the same order in the array in which they were added to the list. */
4601 while (nfields
-- > 0)
4603 struct nextfield
*fieldp
;
4607 fieldp
= fip
->fields
;
4608 fip
->fields
= fieldp
->next
;
4612 fieldp
= fip
->baseclasses
;
4613 fip
->baseclasses
= fieldp
->next
;
4616 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4617 switch (fieldp
->accessibility
)
4619 case DW_ACCESS_private
:
4620 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4623 case DW_ACCESS_protected
:
4624 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4627 case DW_ACCESS_public
:
4631 /* Unknown accessibility. Complain and treat it as public. */
4633 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4634 fieldp
->accessibility
);
4638 if (nfields
< fip
->nbaseclasses
)
4640 switch (fieldp
->virtuality
)
4642 case DW_VIRTUALITY_virtual
:
4643 case DW_VIRTUALITY_pure_virtual
:
4644 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4651 /* Add a member function to the proper fieldlist. */
4654 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4655 struct type
*type
, struct dwarf2_cu
*cu
)
4657 struct objfile
*objfile
= cu
->objfile
;
4658 struct attribute
*attr
;
4659 struct fnfieldlist
*flp
;
4661 struct fn_field
*fnp
;
4664 struct nextfnfield
*new_fnfield
;
4665 struct type
*this_type
;
4667 /* Get name of member function. */
4668 fieldname
= dwarf2_name (die
, cu
);
4669 if (fieldname
== NULL
)
4672 /* Get the mangled name. */
4673 physname
= dwarf2_linkage_name (die
, cu
);
4675 /* Look up member function name in fieldlist. */
4676 for (i
= 0; i
< fip
->nfnfields
; i
++)
4678 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4682 /* Create new list element if necessary. */
4683 if (i
< fip
->nfnfields
)
4684 flp
= &fip
->fnfieldlists
[i
];
4687 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4689 fip
->fnfieldlists
= (struct fnfieldlist
*)
4690 xrealloc (fip
->fnfieldlists
,
4691 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4692 * sizeof (struct fnfieldlist
));
4693 if (fip
->nfnfields
== 0)
4694 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4696 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4697 flp
->name
= fieldname
;
4703 /* Create a new member function field and chain it to the field list
4705 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4706 make_cleanup (xfree
, new_fnfield
);
4707 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4708 new_fnfield
->next
= flp
->head
;
4709 flp
->head
= new_fnfield
;
4712 /* Fill in the member function field info. */
4713 fnp
= &new_fnfield
->fnfield
;
4714 /* The name is already allocated along with this objfile, so we don't
4715 need to duplicate it for the type. */
4716 fnp
->physname
= physname
? physname
: "";
4717 fnp
->type
= alloc_type (objfile
);
4718 this_type
= read_type_die (die
, cu
);
4719 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4721 int nparams
= TYPE_NFIELDS (this_type
);
4723 /* TYPE is the domain of this method, and THIS_TYPE is the type
4724 of the method itself (TYPE_CODE_METHOD). */
4725 smash_to_method_type (fnp
->type
, type
,
4726 TYPE_TARGET_TYPE (this_type
),
4727 TYPE_FIELDS (this_type
),
4728 TYPE_NFIELDS (this_type
),
4729 TYPE_VARARGS (this_type
));
4731 /* Handle static member functions.
4732 Dwarf2 has no clean way to discern C++ static and non-static
4733 member functions. G++ helps GDB by marking the first
4734 parameter for non-static member functions (which is the
4735 this pointer) as artificial. We obtain this information
4736 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4737 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4738 fnp
->voffset
= VOFFSET_STATIC
;
4741 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4744 /* Get fcontext from DW_AT_containing_type if present. */
4745 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4746 fnp
->fcontext
= die_containing_type (die
, cu
);
4748 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4749 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4751 /* Get accessibility. */
4752 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4755 switch (DW_UNSND (attr
))
4757 case DW_ACCESS_private
:
4758 fnp
->is_private
= 1;
4760 case DW_ACCESS_protected
:
4761 fnp
->is_protected
= 1;
4766 /* Check for artificial methods. */
4767 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4768 if (attr
&& DW_UNSND (attr
) != 0)
4769 fnp
->is_artificial
= 1;
4771 /* Get index in virtual function table if it is a virtual member
4772 function. For GCC, this is an offset in the appropriate
4773 virtual table, as specified by DW_AT_containing_type. For
4774 everyone else, it is an expression to be evaluated relative
4775 to the object address. */
4777 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4778 if (attr
&& fnp
->fcontext
)
4780 /* Support the .debug_loc offsets */
4781 if (attr_form_is_block (attr
))
4783 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4785 else if (attr_form_is_section_offset (attr
))
4787 dwarf2_complex_location_expr_complaint ();
4791 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4797 /* We only support trivial expressions here. This hack will work
4798 for v3 classes, which always start with the vtable pointer. */
4799 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4800 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4802 struct dwarf_block blk
;
4803 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4804 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4805 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4806 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4807 dwarf2_complex_location_expr_complaint ();
4809 fnp
->voffset
/= cu
->header
.addr_size
;
4811 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4814 dwarf2_complex_location_expr_complaint ();
4818 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4819 if (attr
&& DW_UNSND (attr
))
4821 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4822 complaint (&symfile_complaints
,
4823 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4824 fieldname
, die
->offset
);
4825 TYPE_CPLUS_DYNAMIC (type
) = 1;
4830 /* Create the vector of member function fields, and attach it to the type. */
4833 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4834 struct dwarf2_cu
*cu
)
4836 struct fnfieldlist
*flp
;
4837 int total_length
= 0;
4840 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4841 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4842 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4844 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4846 struct nextfnfield
*nfp
= flp
->head
;
4847 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4850 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4851 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4852 fn_flp
->fn_fields
= (struct fn_field
*)
4853 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4854 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4855 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4857 total_length
+= flp
->length
;
4860 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4861 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4864 /* Returns non-zero if NAME is the name of a vtable member in CU's
4865 language, zero otherwise. */
4867 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4869 static const char vptr
[] = "_vptr";
4870 static const char vtable
[] = "vtable";
4872 /* Look for the C++ and Java forms of the vtable. */
4873 if ((cu
->language
== language_java
4874 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4875 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4876 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4882 /* GCC outputs unnamed structures that are really pointers to member
4883 functions, with the ABI-specified layout. If DIE (from CU) describes
4884 such a structure, set its type, and return nonzero. Otherwise return
4887 GCC shouldn't do this; it should just output pointer to member DIEs.
4888 This is GCC PR debug/28767. */
4890 static struct type
*
4891 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4893 struct objfile
*objfile
= cu
->objfile
;
4895 struct die_info
*pfn_die
, *delta_die
;
4896 struct attribute
*pfn_name
, *delta_name
;
4897 struct type
*pfn_type
, *domain_type
;
4899 /* Check for a structure with no name and two children. */
4900 if (die
->tag
!= DW_TAG_structure_type
4901 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4902 || die
->child
== NULL
4903 || die
->child
->sibling
== NULL
4904 || (die
->child
->sibling
->sibling
!= NULL
4905 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4908 /* Check for __pfn and __delta members. */
4909 pfn_die
= die
->child
;
4910 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4911 if (pfn_die
->tag
!= DW_TAG_member
4913 || DW_STRING (pfn_name
) == NULL
4914 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4917 delta_die
= pfn_die
->sibling
;
4918 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4919 if (delta_die
->tag
!= DW_TAG_member
4920 || delta_name
== NULL
4921 || DW_STRING (delta_name
) == NULL
4922 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4925 /* Find the type of the method. */
4926 pfn_type
= die_type (pfn_die
, cu
);
4927 if (pfn_type
== NULL
4928 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4929 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4932 /* Look for the "this" argument. */
4933 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4934 if (TYPE_NFIELDS (pfn_type
) == 0
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 type
= alloc_type (objfile
);
4940 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4941 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4942 TYPE_VARARGS (pfn_type
));
4943 type
= lookup_methodptr_type (type
);
4944 return set_die_type (die
, type
, cu
);
4947 /* Called when we find the DIE that starts a structure or union scope
4948 (definition) to process all dies that define the members of the
4951 NOTE: we need to call struct_type regardless of whether or not the
4952 DIE has an at_name attribute, since it might be an anonymous
4953 structure or union. This gets the type entered into our set of
4956 However, if the structure is incomplete (an opaque struct/union)
4957 then suppress creating a symbol table entry for it since gdb only
4958 wants to find the one with the complete definition. Note that if
4959 it is complete, we just call new_symbol, which does it's own
4960 checking about whether the struct/union is anonymous or not (and
4961 suppresses creating a symbol table entry itself). */
4963 static struct type
*
4964 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4966 struct objfile
*objfile
= cu
->objfile
;
4968 struct attribute
*attr
;
4970 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4972 type
= quirk_gcc_member_function_pointer (die
, cu
);
4976 /* If the definition of this type lives in .debug_types, read that type.
4977 Don't follow DW_AT_specification though, that will take us back up
4978 the chain and we want to go down. */
4979 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4982 struct dwarf2_cu
*type_cu
= cu
;
4983 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4984 /* We could just recurse on read_structure_type, but we need to call
4985 get_die_type to ensure only one type for this DIE is created.
4986 This is important, for example, because for c++ classes we need
4987 TYPE_NAME set which is only done by new_symbol. Blech. */
4988 type
= read_type_die (type_die
, type_cu
);
4989 return set_die_type (die
, type
, cu
);
4992 type
= alloc_type (objfile
);
4993 INIT_CPLUS_SPECIFIC (type
);
4995 name
= dwarf2_name (die
, cu
);
4998 if (cu
->language
== language_cplus
4999 || cu
->language
== language_java
)
5001 const char *new_prefix
= determine_class_name (die
, cu
);
5002 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
5006 /* The name is already allocated along with this objfile, so
5007 we don't need to duplicate it for the type. */
5008 TYPE_TAG_NAME (type
) = name
;
5012 if (die
->tag
== DW_TAG_structure_type
)
5014 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5016 else if (die
->tag
== DW_TAG_union_type
)
5018 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5022 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5024 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5027 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5030 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5034 TYPE_LENGTH (type
) = 0;
5037 TYPE_STUB_SUPPORTED (type
) = 1;
5038 if (die_is_declaration (die
, cu
))
5039 TYPE_STUB (type
) = 1;
5041 /* We need to add the type field to the die immediately so we don't
5042 infinitely recurse when dealing with pointers to the structure
5043 type within the structure itself. */
5044 set_die_type (die
, type
, cu
);
5046 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5048 struct field_info fi
;
5049 struct die_info
*child_die
;
5051 memset (&fi
, 0, sizeof (struct field_info
));
5053 child_die
= die
->child
;
5055 while (child_die
&& child_die
->tag
)
5057 if (child_die
->tag
== DW_TAG_member
5058 || child_die
->tag
== DW_TAG_variable
)
5060 /* NOTE: carlton/2002-11-05: A C++ static data member
5061 should be a DW_TAG_member that is a declaration, but
5062 all versions of G++ as of this writing (so through at
5063 least 3.2.1) incorrectly generate DW_TAG_variable
5064 tags for them instead. */
5065 dwarf2_add_field (&fi
, child_die
, cu
);
5067 else if (child_die
->tag
== DW_TAG_subprogram
)
5069 /* C++ member function. */
5070 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5072 else if (child_die
->tag
== DW_TAG_inheritance
)
5074 /* C++ base class field. */
5075 dwarf2_add_field (&fi
, child_die
, cu
);
5077 child_die
= sibling_die (child_die
);
5080 /* Attach fields and member functions to the type. */
5082 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5085 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5087 /* Get the type which refers to the base class (possibly this
5088 class itself) which contains the vtable pointer for the current
5089 class from the DW_AT_containing_type attribute. This use of
5090 DW_AT_containing_type is a GNU extension. */
5092 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5094 struct type
*t
= die_containing_type (die
, cu
);
5096 TYPE_VPTR_BASETYPE (type
) = t
;
5101 /* Our own class provides vtbl ptr. */
5102 for (i
= TYPE_NFIELDS (t
) - 1;
5103 i
>= TYPE_N_BASECLASSES (t
);
5106 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5108 if (is_vtable_name (fieldname
, cu
))
5110 TYPE_VPTR_FIELDNO (type
) = i
;
5115 /* Complain if virtual function table field not found. */
5116 if (i
< TYPE_N_BASECLASSES (t
))
5117 complaint (&symfile_complaints
,
5118 _("virtual function table pointer not found when defining class '%s'"),
5119 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5124 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5127 else if (cu
->producer
5128 && strncmp (cu
->producer
,
5129 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5131 /* The IBM XLC compiler does not provide direct indication
5132 of the containing type, but the vtable pointer is
5133 always named __vfp. */
5137 for (i
= TYPE_NFIELDS (type
) - 1;
5138 i
>= TYPE_N_BASECLASSES (type
);
5141 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5143 TYPE_VPTR_FIELDNO (type
) = i
;
5144 TYPE_VPTR_BASETYPE (type
) = type
;
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 do_cleanups (back_to
);
5456 /* Install the type in the die. */
5457 return set_die_type (die
, type
, cu
);
5460 static enum dwarf_array_dim_ordering
5461 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5463 struct attribute
*attr
;
5465 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5467 if (attr
) return DW_SND (attr
);
5470 GNU F77 is a special case, as at 08/2004 array type info is the
5471 opposite order to the dwarf2 specification, but data is still
5472 laid out as per normal fortran.
5474 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5478 if (cu
->language
== language_fortran
5479 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5481 return DW_ORD_row_major
;
5484 switch (cu
->language_defn
->la_array_ordering
)
5486 case array_column_major
:
5487 return DW_ORD_col_major
;
5488 case array_row_major
:
5490 return DW_ORD_row_major
;
5494 /* Extract all information from a DW_TAG_set_type DIE and put it in
5495 the DIE's type field. */
5497 static struct type
*
5498 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5500 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5502 return set_die_type (die
, set_type
, cu
);
5505 /* First cut: install each common block member as a global variable. */
5508 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5510 struct die_info
*child_die
;
5511 struct attribute
*attr
;
5513 CORE_ADDR base
= (CORE_ADDR
) 0;
5515 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5518 /* Support the .debug_loc offsets */
5519 if (attr_form_is_block (attr
))
5521 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5523 else if (attr_form_is_section_offset (attr
))
5525 dwarf2_complex_location_expr_complaint ();
5529 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5530 "common block member");
5533 if (die
->child
!= NULL
)
5535 child_die
= die
->child
;
5536 while (child_die
&& child_die
->tag
)
5538 sym
= new_symbol (child_die
, NULL
, cu
);
5539 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5542 CORE_ADDR byte_offset
= 0;
5544 if (attr_form_is_section_offset (attr
))
5545 dwarf2_complex_location_expr_complaint ();
5546 else if (attr_form_is_constant (attr
))
5547 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5548 else if (attr_form_is_block (attr
))
5549 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5551 dwarf2_complex_location_expr_complaint ();
5553 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5554 add_symbol_to_list (sym
, &global_symbols
);
5556 child_die
= sibling_die (child_die
);
5561 /* Create a type for a C++ namespace. */
5563 static struct type
*
5564 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5566 struct objfile
*objfile
= cu
->objfile
;
5567 const char *previous_prefix
, *name
;
5571 /* For extensions, reuse the type of the original namespace. */
5572 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5574 struct die_info
*ext_die
;
5575 struct dwarf2_cu
*ext_cu
= cu
;
5576 ext_die
= dwarf2_extension (die
, &ext_cu
);
5577 type
= read_type_die (ext_die
, ext_cu
);
5578 return set_die_type (die
, type
, cu
);
5581 name
= namespace_name (die
, &is_anonymous
, cu
);
5583 /* Now build the name of the current namespace. */
5585 previous_prefix
= determine_prefix (die
, cu
);
5586 if (previous_prefix
[0] != '\0')
5587 name
= typename_concat (&objfile
->objfile_obstack
,
5588 previous_prefix
, name
, cu
);
5590 /* Create the type. */
5591 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5593 TYPE_NAME (type
) = (char *) name
;
5594 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5596 set_die_type (die
, type
, cu
);
5601 /* Read a C++ namespace. */
5604 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5606 struct objfile
*objfile
= cu
->objfile
;
5610 /* Add a symbol associated to this if we haven't seen the namespace
5611 before. Also, add a using directive if it's an anonymous
5614 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5618 type
= read_type_die (die
, cu
);
5619 new_symbol (die
, type
, cu
);
5621 name
= namespace_name (die
, &is_anonymous
, cu
);
5624 const char *previous_prefix
= determine_prefix (die
, cu
);
5625 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5629 if (die
->child
!= NULL
)
5631 struct die_info
*child_die
= die
->child
;
5633 while (child_die
&& child_die
->tag
)
5635 process_die (child_die
, cu
);
5636 child_die
= sibling_die (child_die
);
5641 /* Read a Fortran module. */
5644 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5646 struct die_info
*child_die
= die
->child
;
5648 /* FIXME: Support the separate Fortran module namespaces. */
5650 while (child_die
&& child_die
->tag
)
5652 process_die (child_die
, cu
);
5653 child_die
= sibling_die (child_die
);
5657 /* Return the name of the namespace represented by DIE. Set
5658 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5662 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5664 struct die_info
*current_die
;
5665 const char *name
= NULL
;
5667 /* Loop through the extensions until we find a name. */
5669 for (current_die
= die
;
5670 current_die
!= NULL
;
5671 current_die
= dwarf2_extension (die
, &cu
))
5673 name
= dwarf2_name (current_die
, cu
);
5678 /* Is it an anonymous namespace? */
5680 *is_anonymous
= (name
== NULL
);
5682 name
= "(anonymous namespace)";
5687 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5688 the user defined type vector. */
5690 static struct type
*
5691 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5693 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5694 struct comp_unit_head
*cu_header
= &cu
->header
;
5696 struct attribute
*attr_byte_size
;
5697 struct attribute
*attr_address_class
;
5698 int byte_size
, addr_class
;
5700 type
= lookup_pointer_type (die_type (die
, cu
));
5702 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5704 byte_size
= DW_UNSND (attr_byte_size
);
5706 byte_size
= cu_header
->addr_size
;
5708 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5709 if (attr_address_class
)
5710 addr_class
= DW_UNSND (attr_address_class
);
5712 addr_class
= DW_ADDR_none
;
5714 /* If the pointer size or address class is different than the
5715 default, create a type variant marked as such and set the
5716 length accordingly. */
5717 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5719 if (gdbarch_address_class_type_flags_p (gdbarch
))
5723 type_flags
= gdbarch_address_class_type_flags
5724 (gdbarch
, byte_size
, addr_class
);
5725 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5727 type
= make_type_with_address_space (type
, type_flags
);
5729 else if (TYPE_LENGTH (type
) != byte_size
)
5731 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5734 /* Should we also complain about unhandled address classes? */
5738 TYPE_LENGTH (type
) = byte_size
;
5739 return set_die_type (die
, type
, cu
);
5742 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5743 the user defined type vector. */
5745 static struct type
*
5746 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5748 struct objfile
*objfile
= cu
->objfile
;
5750 struct type
*to_type
;
5751 struct type
*domain
;
5753 to_type
= die_type (die
, cu
);
5754 domain
= die_containing_type (die
, cu
);
5756 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5757 type
= lookup_methodptr_type (to_type
);
5759 type
= lookup_memberptr_type (to_type
, domain
);
5761 return set_die_type (die
, type
, cu
);
5764 /* Extract all information from a DW_TAG_reference_type DIE and add to
5765 the user defined type vector. */
5767 static struct type
*
5768 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5770 struct comp_unit_head
*cu_header
= &cu
->header
;
5772 struct attribute
*attr
;
5774 type
= lookup_reference_type (die_type (die
, cu
));
5775 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5778 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5782 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5784 return set_die_type (die
, type
, cu
);
5787 static struct type
*
5788 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5790 struct type
*base_type
, *cv_type
;
5792 base_type
= die_type (die
, cu
);
5793 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5794 return set_die_type (die
, cv_type
, cu
);
5797 static struct type
*
5798 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5800 struct type
*base_type
, *cv_type
;
5802 base_type
= die_type (die
, cu
);
5803 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5804 return set_die_type (die
, cv_type
, cu
);
5807 /* Extract all information from a DW_TAG_string_type DIE and add to
5808 the user defined type vector. It isn't really a user defined type,
5809 but it behaves like one, with other DIE's using an AT_user_def_type
5810 attribute to reference it. */
5812 static struct type
*
5813 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5815 struct objfile
*objfile
= cu
->objfile
;
5816 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5817 struct type
*type
, *range_type
, *index_type
, *char_type
;
5818 struct attribute
*attr
;
5819 unsigned int length
;
5821 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5824 length
= DW_UNSND (attr
);
5828 /* check for the DW_AT_byte_size attribute */
5829 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5832 length
= DW_UNSND (attr
);
5840 index_type
= objfile_type (objfile
)->builtin_int
;
5841 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5842 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5843 type
= create_string_type (NULL
, char_type
, range_type
);
5845 return set_die_type (die
, type
, cu
);
5848 /* Handle DIES due to C code like:
5852 int (*funcp)(int a, long l);
5856 ('funcp' generates a DW_TAG_subroutine_type DIE)
5859 static struct type
*
5860 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5862 struct type
*type
; /* Type that this function returns */
5863 struct type
*ftype
; /* Function that returns above type */
5864 struct attribute
*attr
;
5866 type
= die_type (die
, cu
);
5867 ftype
= lookup_function_type (type
);
5869 /* All functions in C++, Pascal and Java have prototypes. */
5870 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5871 if ((attr
&& (DW_UNSND (attr
) != 0))
5872 || cu
->language
== language_cplus
5873 || cu
->language
== language_java
5874 || cu
->language
== language_pascal
)
5875 TYPE_PROTOTYPED (ftype
) = 1;
5877 /* Store the calling convention in the type if it's available in
5878 the subroutine die. Otherwise set the calling convention to
5879 the default value DW_CC_normal. */
5880 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5881 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5883 /* We need to add the subroutine type to the die immediately so
5884 we don't infinitely recurse when dealing with parameters
5885 declared as the same subroutine type. */
5886 set_die_type (die
, ftype
, cu
);
5888 if (die
->child
!= NULL
)
5890 struct die_info
*child_die
;
5894 /* Count the number of parameters.
5895 FIXME: GDB currently ignores vararg functions, but knows about
5896 vararg member functions. */
5897 child_die
= die
->child
;
5898 while (child_die
&& child_die
->tag
)
5900 if (child_die
->tag
== DW_TAG_formal_parameter
)
5902 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5903 TYPE_VARARGS (ftype
) = 1;
5904 child_die
= sibling_die (child_die
);
5907 /* Allocate storage for parameters and fill them in. */
5908 TYPE_NFIELDS (ftype
) = nparams
;
5909 TYPE_FIELDS (ftype
) = (struct field
*)
5910 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5912 child_die
= die
->child
;
5913 while (child_die
&& child_die
->tag
)
5915 if (child_die
->tag
== DW_TAG_formal_parameter
)
5917 /* Dwarf2 has no clean way to discern C++ static and non-static
5918 member functions. G++ helps GDB by marking the first
5919 parameter for non-static member functions (which is the
5920 this pointer) as artificial. We pass this information
5921 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5922 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5924 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5926 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5927 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5930 child_die
= sibling_die (child_die
);
5937 static struct type
*
5938 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5940 struct objfile
*objfile
= cu
->objfile
;
5941 struct attribute
*attr
;
5942 const char *name
= NULL
;
5943 struct type
*this_type
;
5945 name
= dwarf2_full_name (die
, cu
);
5946 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5947 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5948 TYPE_NAME (this_type
) = (char *) name
;
5949 set_die_type (die
, this_type
, cu
);
5950 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5954 /* Find a representation of a given base type and install
5955 it in the TYPE field of the die. */
5957 static struct type
*
5958 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5960 struct objfile
*objfile
= cu
->objfile
;
5962 struct attribute
*attr
;
5963 int encoding
= 0, size
= 0;
5965 enum type_code code
= TYPE_CODE_INT
;
5967 struct type
*target_type
= NULL
;
5969 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5972 encoding
= DW_UNSND (attr
);
5974 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5977 size
= DW_UNSND (attr
);
5979 name
= dwarf2_name (die
, cu
);
5982 complaint (&symfile_complaints
,
5983 _("DW_AT_name missing from DW_TAG_base_type"));
5988 case DW_ATE_address
:
5989 /* Turn DW_ATE_address into a void * pointer. */
5990 code
= TYPE_CODE_PTR
;
5991 type_flags
|= TYPE_FLAG_UNSIGNED
;
5992 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5994 case DW_ATE_boolean
:
5995 code
= TYPE_CODE_BOOL
;
5996 type_flags
|= TYPE_FLAG_UNSIGNED
;
5998 case DW_ATE_complex_float
:
5999 code
= TYPE_CODE_COMPLEX
;
6000 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6002 case DW_ATE_decimal_float
:
6003 code
= TYPE_CODE_DECFLOAT
;
6006 code
= TYPE_CODE_FLT
;
6010 case DW_ATE_unsigned
:
6011 type_flags
|= TYPE_FLAG_UNSIGNED
;
6013 case DW_ATE_signed_char
:
6014 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6015 || cu
->language
== language_pascal
)
6016 code
= TYPE_CODE_CHAR
;
6018 case DW_ATE_unsigned_char
:
6019 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6020 || cu
->language
== language_pascal
)
6021 code
= TYPE_CODE_CHAR
;
6022 type_flags
|= TYPE_FLAG_UNSIGNED
;
6025 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6026 dwarf_type_encoding_name (encoding
));
6030 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6031 TYPE_NAME (type
) = name
;
6032 TYPE_TARGET_TYPE (type
) = target_type
;
6034 if (name
&& strcmp (name
, "char") == 0)
6035 TYPE_NOSIGN (type
) = 1;
6037 return set_die_type (die
, type
, cu
);
6040 /* Read the given DW_AT_subrange DIE. */
6042 static struct type
*
6043 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6045 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6046 struct type
*base_type
;
6047 struct type
*range_type
;
6048 struct attribute
*attr
;
6052 LONGEST negative_mask
;
6054 base_type
= die_type (die
, cu
);
6055 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6057 complaint (&symfile_complaints
,
6058 _("DW_AT_type missing from DW_TAG_subrange_type"));
6060 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6061 0, NULL
, cu
->objfile
);
6064 if (cu
->language
== language_fortran
)
6066 /* FORTRAN implies a lower bound of 1, if not given. */
6070 /* FIXME: For variable sized arrays either of these could be
6071 a variable rather than a constant value. We'll allow it,
6072 but we don't know how to handle it. */
6073 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6075 low
= dwarf2_get_attr_constant_value (attr
, 0);
6077 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6080 if (attr
->form
== DW_FORM_block1
)
6082 /* GCC encodes arrays with unspecified or dynamic length
6083 with a DW_FORM_block1 attribute.
6084 FIXME: GDB does not yet know how to handle dynamic
6085 arrays properly, treat them as arrays with unspecified
6088 FIXME: jimb/2003-09-22: GDB does not really know
6089 how to handle arrays of unspecified length
6090 either; we just represent them as zero-length
6091 arrays. Choose an appropriate upper bound given
6092 the lower bound we've computed above. */
6096 high
= dwarf2_get_attr_constant_value (attr
, 1);
6100 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6101 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6102 low
|= negative_mask
;
6103 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6104 high
|= negative_mask
;
6106 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6108 name
= dwarf2_name (die
, cu
);
6110 TYPE_NAME (range_type
) = name
;
6112 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6114 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6116 return set_die_type (die
, range_type
, cu
);
6119 static struct type
*
6120 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6124 /* For now, we only support the C meaning of an unspecified type: void. */
6126 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6127 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6129 return set_die_type (die
, type
, cu
);
6132 /* Trivial hash function for die_info: the hash value of a DIE
6133 is its offset in .debug_info for this objfile. */
6136 die_hash (const void *item
)
6138 const struct die_info
*die
= item
;
6142 /* Trivial comparison function for die_info structures: two DIEs
6143 are equal if they have the same offset. */
6146 die_eq (const void *item_lhs
, const void *item_rhs
)
6148 const struct die_info
*die_lhs
= item_lhs
;
6149 const struct die_info
*die_rhs
= item_rhs
;
6150 return die_lhs
->offset
== die_rhs
->offset
;
6153 /* Read a whole compilation unit into a linked list of dies. */
6155 static struct die_info
*
6156 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6158 struct die_reader_specs reader_specs
;
6160 gdb_assert (cu
->die_hash
== NULL
);
6162 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6166 &cu
->comp_unit_obstack
,
6167 hashtab_obstack_allocate
,
6168 dummy_obstack_deallocate
);
6170 init_cu_die_reader (&reader_specs
, cu
);
6172 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6175 /* Main entry point for reading a DIE and all children.
6176 Read the DIE and dump it if requested. */
6178 static struct die_info
*
6179 read_die_and_children (const struct die_reader_specs
*reader
,
6181 gdb_byte
**new_info_ptr
,
6182 struct die_info
*parent
)
6184 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6185 new_info_ptr
, parent
);
6187 if (dwarf2_die_debug
)
6189 fprintf_unfiltered (gdb_stdlog
,
6190 "\nRead die from %s of %s:\n",
6191 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6193 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6195 : "unknown section",
6196 reader
->abfd
->filename
);
6197 dump_die (result
, dwarf2_die_debug
);
6203 /* Read a single die and all its descendents. Set the die's sibling
6204 field to NULL; set other fields in the die correctly, and set all
6205 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6206 location of the info_ptr after reading all of those dies. PARENT
6207 is the parent of the die in question. */
6209 static struct die_info
*
6210 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6212 gdb_byte
**new_info_ptr
,
6213 struct die_info
*parent
)
6215 struct die_info
*die
;
6219 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6222 *new_info_ptr
= cur_ptr
;
6225 store_in_ref_table (die
, reader
->cu
);
6228 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6232 *new_info_ptr
= cur_ptr
;
6235 die
->sibling
= NULL
;
6236 die
->parent
= parent
;
6240 /* Read a die, all of its descendents, and all of its siblings; set
6241 all of the fields of all of the dies correctly. Arguments are as
6242 in read_die_and_children. */
6244 static struct die_info
*
6245 read_die_and_siblings (const struct die_reader_specs
*reader
,
6247 gdb_byte
**new_info_ptr
,
6248 struct die_info
*parent
)
6250 struct die_info
*first_die
, *last_sibling
;
6254 first_die
= last_sibling
= NULL
;
6258 struct die_info
*die
6259 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6263 *new_info_ptr
= cur_ptr
;
6270 last_sibling
->sibling
= die
;
6276 /* Read the die from the .debug_info section buffer. Set DIEP to
6277 point to a newly allocated die with its information, except for its
6278 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6279 whether the die has children or not. */
6282 read_full_die (const struct die_reader_specs
*reader
,
6283 struct die_info
**diep
, gdb_byte
*info_ptr
,
6286 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6287 struct abbrev_info
*abbrev
;
6288 struct die_info
*die
;
6289 struct dwarf2_cu
*cu
= reader
->cu
;
6290 bfd
*abfd
= reader
->abfd
;
6292 offset
= info_ptr
- reader
->buffer
;
6293 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6294 info_ptr
+= bytes_read
;
6302 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6304 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6306 bfd_get_filename (abfd
));
6308 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6309 die
->offset
= offset
;
6310 die
->tag
= abbrev
->tag
;
6311 die
->abbrev
= abbrev_number
;
6313 die
->num_attrs
= abbrev
->num_attrs
;
6315 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6316 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6317 abfd
, info_ptr
, cu
);
6320 *has_children
= abbrev
->has_children
;
6324 /* In DWARF version 2, the description of the debugging information is
6325 stored in a separate .debug_abbrev section. Before we read any
6326 dies from a section we read in all abbreviations and install them
6327 in a hash table. This function also sets flags in CU describing
6328 the data found in the abbrev table. */
6331 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6333 struct comp_unit_head
*cu_header
= &cu
->header
;
6334 gdb_byte
*abbrev_ptr
;
6335 struct abbrev_info
*cur_abbrev
;
6336 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6337 unsigned int abbrev_form
, hash_number
;
6338 struct attr_abbrev
*cur_attrs
;
6339 unsigned int allocated_attrs
;
6341 /* Initialize dwarf2 abbrevs */
6342 obstack_init (&cu
->abbrev_obstack
);
6343 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6345 * sizeof (struct abbrev_info
*)));
6346 memset (cu
->dwarf2_abbrevs
, 0,
6347 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6349 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6350 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6351 abbrev_ptr
+= bytes_read
;
6353 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6354 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6356 /* loop until we reach an abbrev number of 0 */
6357 while (abbrev_number
)
6359 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6361 /* read in abbrev header */
6362 cur_abbrev
->number
= abbrev_number
;
6363 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6364 abbrev_ptr
+= bytes_read
;
6365 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6368 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6369 cu
->has_namespace_info
= 1;
6371 /* now read in declarations */
6372 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6373 abbrev_ptr
+= bytes_read
;
6374 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6375 abbrev_ptr
+= bytes_read
;
6378 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6380 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6382 = xrealloc (cur_attrs
, (allocated_attrs
6383 * sizeof (struct attr_abbrev
)));
6386 /* Record whether this compilation unit might have
6387 inter-compilation-unit references. If we don't know what form
6388 this attribute will have, then it might potentially be a
6389 DW_FORM_ref_addr, so we conservatively expect inter-CU
6392 if (abbrev_form
== DW_FORM_ref_addr
6393 || abbrev_form
== DW_FORM_indirect
)
6394 cu
->has_form_ref_addr
= 1;
6396 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6397 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6398 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6399 abbrev_ptr
+= bytes_read
;
6400 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6401 abbrev_ptr
+= bytes_read
;
6404 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6405 (cur_abbrev
->num_attrs
6406 * sizeof (struct attr_abbrev
)));
6407 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6408 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6410 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6411 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6412 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6414 /* Get next abbreviation.
6415 Under Irix6 the abbreviations for a compilation unit are not
6416 always properly terminated with an abbrev number of 0.
6417 Exit loop if we encounter an abbreviation which we have
6418 already read (which means we are about to read the abbreviations
6419 for the next compile unit) or if the end of the abbreviation
6420 table is reached. */
6421 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6422 >= dwarf2_per_objfile
->abbrev
.size
)
6424 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6425 abbrev_ptr
+= bytes_read
;
6426 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6433 /* Release the memory used by the abbrev table for a compilation unit. */
6436 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6438 struct dwarf2_cu
*cu
= ptr_to_cu
;
6440 obstack_free (&cu
->abbrev_obstack
, NULL
);
6441 cu
->dwarf2_abbrevs
= NULL
;
6444 /* Lookup an abbrev_info structure in the abbrev hash table. */
6446 static struct abbrev_info
*
6447 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6449 unsigned int hash_number
;
6450 struct abbrev_info
*abbrev
;
6452 hash_number
= number
% ABBREV_HASH_SIZE
;
6453 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6457 if (abbrev
->number
== number
)
6460 abbrev
= abbrev
->next
;
6465 /* Returns nonzero if TAG represents a type that we might generate a partial
6469 is_type_tag_for_partial (int tag
)
6474 /* Some types that would be reasonable to generate partial symbols for,
6475 that we don't at present. */
6476 case DW_TAG_array_type
:
6477 case DW_TAG_file_type
:
6478 case DW_TAG_ptr_to_member_type
:
6479 case DW_TAG_set_type
:
6480 case DW_TAG_string_type
:
6481 case DW_TAG_subroutine_type
:
6483 case DW_TAG_base_type
:
6484 case DW_TAG_class_type
:
6485 case DW_TAG_interface_type
:
6486 case DW_TAG_enumeration_type
:
6487 case DW_TAG_structure_type
:
6488 case DW_TAG_subrange_type
:
6489 case DW_TAG_typedef
:
6490 case DW_TAG_union_type
:
6497 /* Load all DIEs that are interesting for partial symbols into memory. */
6499 static struct partial_die_info
*
6500 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6501 int building_psymtab
, struct dwarf2_cu
*cu
)
6503 struct partial_die_info
*part_die
;
6504 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6505 struct abbrev_info
*abbrev
;
6506 unsigned int bytes_read
;
6507 unsigned int load_all
= 0;
6509 int nesting_level
= 1;
6514 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6518 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6522 &cu
->comp_unit_obstack
,
6523 hashtab_obstack_allocate
,
6524 dummy_obstack_deallocate
);
6526 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6527 sizeof (struct partial_die_info
));
6531 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6533 /* A NULL abbrev means the end of a series of children. */
6536 if (--nesting_level
== 0)
6538 /* PART_DIE was probably the last thing allocated on the
6539 comp_unit_obstack, so we could call obstack_free
6540 here. We don't do that because the waste is small,
6541 and will be cleaned up when we're done with this
6542 compilation unit. This way, we're also more robust
6543 against other users of the comp_unit_obstack. */
6546 info_ptr
+= bytes_read
;
6547 last_die
= parent_die
;
6548 parent_die
= parent_die
->die_parent
;
6552 /* Check whether this DIE is interesting enough to save. Normally
6553 we would not be interested in members here, but there may be
6554 later variables referencing them via DW_AT_specification (for
6557 && !is_type_tag_for_partial (abbrev
->tag
)
6558 && abbrev
->tag
!= DW_TAG_enumerator
6559 && abbrev
->tag
!= DW_TAG_subprogram
6560 && abbrev
->tag
!= DW_TAG_lexical_block
6561 && abbrev
->tag
!= DW_TAG_variable
6562 && abbrev
->tag
!= DW_TAG_namespace
6563 && abbrev
->tag
!= DW_TAG_member
)
6565 /* Otherwise we skip to the next sibling, if any. */
6566 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6570 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6571 buffer
, info_ptr
, cu
);
6573 /* This two-pass algorithm for processing partial symbols has a
6574 high cost in cache pressure. Thus, handle some simple cases
6575 here which cover the majority of C partial symbols. DIEs
6576 which neither have specification tags in them, nor could have
6577 specification tags elsewhere pointing at them, can simply be
6578 processed and discarded.
6580 This segment is also optional; scan_partial_symbols and
6581 add_partial_symbol will handle these DIEs if we chain
6582 them in normally. When compilers which do not emit large
6583 quantities of duplicate debug information are more common,
6584 this code can probably be removed. */
6586 /* Any complete simple types at the top level (pretty much all
6587 of them, for a language without namespaces), can be processed
6589 if (parent_die
== NULL
6590 && part_die
->has_specification
== 0
6591 && part_die
->is_declaration
== 0
6592 && (part_die
->tag
== DW_TAG_typedef
6593 || part_die
->tag
== DW_TAG_base_type
6594 || part_die
->tag
== DW_TAG_subrange_type
))
6596 if (building_psymtab
&& part_die
->name
!= NULL
)
6597 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6598 VAR_DOMAIN
, LOC_TYPEDEF
,
6599 &cu
->objfile
->static_psymbols
,
6600 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6601 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6605 /* If we're at the second level, and we're an enumerator, and
6606 our parent has no specification (meaning possibly lives in a
6607 namespace elsewhere), then we can add the partial symbol now
6608 instead of queueing it. */
6609 if (part_die
->tag
== DW_TAG_enumerator
6610 && parent_die
!= NULL
6611 && parent_die
->die_parent
== NULL
6612 && parent_die
->tag
== DW_TAG_enumeration_type
6613 && parent_die
->has_specification
== 0)
6615 if (part_die
->name
== NULL
)
6616 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6617 else if (building_psymtab
)
6618 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6619 VAR_DOMAIN
, LOC_CONST
,
6620 (cu
->language
== language_cplus
6621 || cu
->language
== language_java
)
6622 ? &cu
->objfile
->global_psymbols
6623 : &cu
->objfile
->static_psymbols
,
6624 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6626 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6630 /* We'll save this DIE so link it in. */
6631 part_die
->die_parent
= parent_die
;
6632 part_die
->die_sibling
= NULL
;
6633 part_die
->die_child
= NULL
;
6635 if (last_die
&& last_die
== parent_die
)
6636 last_die
->die_child
= part_die
;
6638 last_die
->die_sibling
= part_die
;
6640 last_die
= part_die
;
6642 if (first_die
== NULL
)
6643 first_die
= part_die
;
6645 /* Maybe add the DIE to the hash table. Not all DIEs that we
6646 find interesting need to be in the hash table, because we
6647 also have the parent/sibling/child chains; only those that we
6648 might refer to by offset later during partial symbol reading.
6650 For now this means things that might have be the target of a
6651 DW_AT_specification, DW_AT_abstract_origin, or
6652 DW_AT_extension. DW_AT_extension will refer only to
6653 namespaces; DW_AT_abstract_origin refers to functions (and
6654 many things under the function DIE, but we do not recurse
6655 into function DIEs during partial symbol reading) and
6656 possibly variables as well; DW_AT_specification refers to
6657 declarations. Declarations ought to have the DW_AT_declaration
6658 flag. It happens that GCC forgets to put it in sometimes, but
6659 only for functions, not for types.
6661 Adding more things than necessary to the hash table is harmless
6662 except for the performance cost. Adding too few will result in
6663 wasted time in find_partial_die, when we reread the compilation
6664 unit with load_all_dies set. */
6667 || abbrev
->tag
== DW_TAG_subprogram
6668 || abbrev
->tag
== DW_TAG_variable
6669 || abbrev
->tag
== DW_TAG_namespace
6670 || part_die
->is_declaration
)
6674 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6675 part_die
->offset
, INSERT
);
6679 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6680 sizeof (struct partial_die_info
));
6682 /* For some DIEs we want to follow their children (if any). For C
6683 we have no reason to follow the children of structures; for other
6684 languages we have to, both so that we can get at method physnames
6685 to infer fully qualified class names, and for DW_AT_specification.
6687 For Ada, we need to scan the children of subprograms and lexical
6688 blocks as well because Ada allows the definition of nested
6689 entities that could be interesting for the debugger, such as
6690 nested subprograms for instance. */
6691 if (last_die
->has_children
6693 || last_die
->tag
== DW_TAG_namespace
6694 || last_die
->tag
== DW_TAG_enumeration_type
6695 || (cu
->language
!= language_c
6696 && (last_die
->tag
== DW_TAG_class_type
6697 || last_die
->tag
== DW_TAG_interface_type
6698 || last_die
->tag
== DW_TAG_structure_type
6699 || last_die
->tag
== DW_TAG_union_type
))
6700 || (cu
->language
== language_ada
6701 && (last_die
->tag
== DW_TAG_subprogram
6702 || last_die
->tag
== DW_TAG_lexical_block
))))
6705 parent_die
= last_die
;
6709 /* Otherwise we skip to the next sibling, if any. */
6710 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6712 /* Back to the top, do it again. */
6716 /* Read a minimal amount of information into the minimal die structure. */
6719 read_partial_die (struct partial_die_info
*part_die
,
6720 struct abbrev_info
*abbrev
,
6721 unsigned int abbrev_len
, bfd
*abfd
,
6722 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6723 struct dwarf2_cu
*cu
)
6725 unsigned int bytes_read
, i
;
6726 struct attribute attr
;
6727 int has_low_pc_attr
= 0;
6728 int has_high_pc_attr
= 0;
6730 memset (part_die
, 0, sizeof (struct partial_die_info
));
6732 part_die
->offset
= info_ptr
- buffer
;
6734 info_ptr
+= abbrev_len
;
6739 part_die
->tag
= abbrev
->tag
;
6740 part_die
->has_children
= abbrev
->has_children
;
6742 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6744 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6746 /* Store the data if it is of an attribute we want to keep in a
6747 partial symbol table. */
6751 switch (part_die
->tag
)
6753 case DW_TAG_compile_unit
:
6754 case DW_TAG_type_unit
:
6755 /* Compilation units have a DW_AT_name that is a filename, not
6756 a source language identifier. */
6757 case DW_TAG_enumeration_type
:
6758 case DW_TAG_enumerator
:
6759 /* These tags always have simple identifiers already; no need
6760 to canonicalize them. */
6761 part_die
->name
= DW_STRING (&attr
);
6765 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6766 &cu
->comp_unit_obstack
);
6770 case DW_AT_MIPS_linkage_name
:
6771 part_die
->name
= DW_STRING (&attr
);
6774 has_low_pc_attr
= 1;
6775 part_die
->lowpc
= DW_ADDR (&attr
);
6778 has_high_pc_attr
= 1;
6779 part_die
->highpc
= DW_ADDR (&attr
);
6781 case DW_AT_location
:
6782 /* Support the .debug_loc offsets */
6783 if (attr_form_is_block (&attr
))
6785 part_die
->locdesc
= DW_BLOCK (&attr
);
6787 else if (attr_form_is_section_offset (&attr
))
6789 dwarf2_complex_location_expr_complaint ();
6793 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6794 "partial symbol information");
6797 case DW_AT_external
:
6798 part_die
->is_external
= DW_UNSND (&attr
);
6800 case DW_AT_declaration
:
6801 part_die
->is_declaration
= DW_UNSND (&attr
);
6804 part_die
->has_type
= 1;
6806 case DW_AT_abstract_origin
:
6807 case DW_AT_specification
:
6808 case DW_AT_extension
:
6809 part_die
->has_specification
= 1;
6810 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6813 /* Ignore absolute siblings, they might point outside of
6814 the current compile unit. */
6815 if (attr
.form
== DW_FORM_ref_addr
)
6816 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6818 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6820 case DW_AT_byte_size
:
6821 part_die
->has_byte_size
= 1;
6823 case DW_AT_calling_convention
:
6824 /* DWARF doesn't provide a way to identify a program's source-level
6825 entry point. DW_AT_calling_convention attributes are only meant
6826 to describe functions' calling conventions.
6828 However, because it's a necessary piece of information in
6829 Fortran, and because DW_CC_program is the only piece of debugging
6830 information whose definition refers to a 'main program' at all,
6831 several compilers have begun marking Fortran main programs with
6832 DW_CC_program --- even when those functions use the standard
6833 calling conventions.
6835 So until DWARF specifies a way to provide this information and
6836 compilers pick up the new representation, we'll support this
6838 if (DW_UNSND (&attr
) == DW_CC_program
6839 && cu
->language
== language_fortran
)
6840 set_main_name (part_die
->name
);
6847 /* When using the GNU linker, .gnu.linkonce. sections are used to
6848 eliminate duplicate copies of functions and vtables and such.
6849 The linker will arbitrarily choose one and discard the others.
6850 The AT_*_pc values for such functions refer to local labels in
6851 these sections. If the section from that file was discarded, the
6852 labels are not in the output, so the relocs get a value of 0.
6853 If this is a discarded function, mark the pc bounds as invalid,
6854 so that GDB will ignore it. */
6855 if (has_low_pc_attr
&& has_high_pc_attr
6856 && part_die
->lowpc
< part_die
->highpc
6857 && (part_die
->lowpc
!= 0
6858 || dwarf2_per_objfile
->has_section_at_zero
))
6859 part_die
->has_pc_info
= 1;
6864 /* Find a cached partial DIE at OFFSET in CU. */
6866 static struct partial_die_info
*
6867 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6869 struct partial_die_info
*lookup_die
= NULL
;
6870 struct partial_die_info part_die
;
6872 part_die
.offset
= offset
;
6873 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6878 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6879 except in the case of .debug_types DIEs which do not reference
6880 outside their CU (they do however referencing other types via
6883 static struct partial_die_info
*
6884 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6886 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6887 struct partial_die_info
*pd
= NULL
;
6889 if (cu
->per_cu
->from_debug_types
)
6891 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6897 if (offset_in_cu_p (&cu
->header
, offset
))
6899 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6904 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6906 if (per_cu
->cu
== NULL
)
6908 load_partial_comp_unit (per_cu
, cu
->objfile
);
6909 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6910 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6913 per_cu
->cu
->last_used
= 0;
6914 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6916 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6918 struct cleanup
*back_to
;
6919 struct partial_die_info comp_unit_die
;
6920 struct abbrev_info
*abbrev
;
6921 unsigned int bytes_read
;
6924 per_cu
->load_all_dies
= 1;
6926 /* Re-read the DIEs. */
6927 back_to
= make_cleanup (null_cleanup
, 0);
6928 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6930 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6931 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6933 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6934 + per_cu
->cu
->header
.offset
6935 + per_cu
->cu
->header
.first_die_offset
);
6936 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6937 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6938 per_cu
->cu
->objfile
->obfd
,
6939 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6941 if (comp_unit_die
.has_children
)
6942 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6943 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6945 do_cleanups (back_to
);
6947 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6953 internal_error (__FILE__
, __LINE__
,
6954 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6955 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6959 /* Adjust PART_DIE before generating a symbol for it. This function
6960 may set the is_external flag or change the DIE's name. */
6963 fixup_partial_die (struct partial_die_info
*part_die
,
6964 struct dwarf2_cu
*cu
)
6966 /* If we found a reference attribute and the DIE has no name, try
6967 to find a name in the referred to DIE. */
6969 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6971 struct partial_die_info
*spec_die
;
6973 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6975 fixup_partial_die (spec_die
, cu
);
6979 part_die
->name
= spec_die
->name
;
6981 /* Copy DW_AT_external attribute if it is set. */
6982 if (spec_die
->is_external
)
6983 part_die
->is_external
= spec_die
->is_external
;
6987 /* Set default names for some unnamed DIEs. */
6988 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6989 || part_die
->tag
== DW_TAG_class_type
))
6990 part_die
->name
= "(anonymous class)";
6992 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6993 part_die
->name
= "(anonymous namespace)";
6995 if (part_die
->tag
== DW_TAG_structure_type
6996 || part_die
->tag
== DW_TAG_class_type
6997 || part_die
->tag
== DW_TAG_union_type
)
6998 guess_structure_name (part_die
, cu
);
7001 /* Read an attribute value described by an attribute form. */
7004 read_attribute_value (struct attribute
*attr
, unsigned form
,
7005 bfd
*abfd
, gdb_byte
*info_ptr
,
7006 struct dwarf2_cu
*cu
)
7008 struct comp_unit_head
*cu_header
= &cu
->header
;
7009 unsigned int bytes_read
;
7010 struct dwarf_block
*blk
;
7016 case DW_FORM_ref_addr
:
7017 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7018 info_ptr
+= bytes_read
;
7020 case DW_FORM_block2
:
7021 blk
= dwarf_alloc_block (cu
);
7022 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7024 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7025 info_ptr
+= blk
->size
;
7026 DW_BLOCK (attr
) = blk
;
7028 case DW_FORM_block4
:
7029 blk
= dwarf_alloc_block (cu
);
7030 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7032 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7033 info_ptr
+= blk
->size
;
7034 DW_BLOCK (attr
) = blk
;
7037 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7041 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7045 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7048 case DW_FORM_string
:
7049 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7050 DW_STRING_IS_CANONICAL (attr
) = 0;
7051 info_ptr
+= bytes_read
;
7054 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7056 DW_STRING_IS_CANONICAL (attr
) = 0;
7057 info_ptr
+= bytes_read
;
7060 blk
= dwarf_alloc_block (cu
);
7061 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7062 info_ptr
+= bytes_read
;
7063 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7064 info_ptr
+= blk
->size
;
7065 DW_BLOCK (attr
) = blk
;
7067 case DW_FORM_block1
:
7068 blk
= dwarf_alloc_block (cu
);
7069 blk
->size
= read_1_byte (abfd
, info_ptr
);
7071 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7072 info_ptr
+= blk
->size
;
7073 DW_BLOCK (attr
) = blk
;
7076 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7080 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7084 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7085 info_ptr
+= bytes_read
;
7088 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7089 info_ptr
+= bytes_read
;
7092 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7096 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7100 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7104 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7108 /* Convert the signature to something we can record in DW_UNSND
7110 NOTE: This is NULL if the type wasn't found. */
7111 DW_SIGNATURED_TYPE (attr
) =
7112 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7115 case DW_FORM_ref_udata
:
7116 DW_ADDR (attr
) = (cu
->header
.offset
7117 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7118 info_ptr
+= bytes_read
;
7120 case DW_FORM_indirect
:
7121 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7122 info_ptr
+= bytes_read
;
7123 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7126 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7127 dwarf_form_name (form
),
7128 bfd_get_filename (abfd
));
7131 /* We have seen instances where the compiler tried to emit a byte
7132 size attribute of -1 which ended up being encoded as an unsigned
7133 0xffffffff. Although 0xffffffff is technically a valid size value,
7134 an object of this size seems pretty unlikely so we can relatively
7135 safely treat these cases as if the size attribute was invalid and
7136 treat them as zero by default. */
7137 if (attr
->name
== DW_AT_byte_size
7138 && form
== DW_FORM_data4
7139 && DW_UNSND (attr
) >= 0xffffffff)
7142 (&symfile_complaints
,
7143 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7144 hex_string (DW_UNSND (attr
)));
7145 DW_UNSND (attr
) = 0;
7151 /* Read an attribute described by an abbreviated attribute. */
7154 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7155 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7157 attr
->name
= abbrev
->name
;
7158 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7161 /* read dwarf information from a buffer */
7164 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7166 return bfd_get_8 (abfd
, buf
);
7170 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7172 return bfd_get_signed_8 (abfd
, buf
);
7176 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7178 return bfd_get_16 (abfd
, buf
);
7182 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7184 return bfd_get_signed_16 (abfd
, buf
);
7188 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7190 return bfd_get_32 (abfd
, buf
);
7194 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7196 return bfd_get_signed_32 (abfd
, buf
);
7200 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7202 return bfd_get_64 (abfd
, buf
);
7206 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7207 unsigned int *bytes_read
)
7209 struct comp_unit_head
*cu_header
= &cu
->header
;
7210 CORE_ADDR retval
= 0;
7212 if (cu_header
->signed_addr_p
)
7214 switch (cu_header
->addr_size
)
7217 retval
= bfd_get_signed_16 (abfd
, buf
);
7220 retval
= bfd_get_signed_32 (abfd
, buf
);
7223 retval
= bfd_get_signed_64 (abfd
, buf
);
7226 internal_error (__FILE__
, __LINE__
,
7227 _("read_address: bad switch, signed [in module %s]"),
7228 bfd_get_filename (abfd
));
7233 switch (cu_header
->addr_size
)
7236 retval
= bfd_get_16 (abfd
, buf
);
7239 retval
= bfd_get_32 (abfd
, buf
);
7242 retval
= bfd_get_64 (abfd
, buf
);
7245 internal_error (__FILE__
, __LINE__
,
7246 _("read_address: bad switch, unsigned [in module %s]"),
7247 bfd_get_filename (abfd
));
7251 *bytes_read
= cu_header
->addr_size
;
7255 /* Read the initial length from a section. The (draft) DWARF 3
7256 specification allows the initial length to take up either 4 bytes
7257 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7258 bytes describe the length and all offsets will be 8 bytes in length
7261 An older, non-standard 64-bit format is also handled by this
7262 function. The older format in question stores the initial length
7263 as an 8-byte quantity without an escape value. Lengths greater
7264 than 2^32 aren't very common which means that the initial 4 bytes
7265 is almost always zero. Since a length value of zero doesn't make
7266 sense for the 32-bit format, this initial zero can be considered to
7267 be an escape value which indicates the presence of the older 64-bit
7268 format. As written, the code can't detect (old format) lengths
7269 greater than 4GB. If it becomes necessary to handle lengths
7270 somewhat larger than 4GB, we could allow other small values (such
7271 as the non-sensical values of 1, 2, and 3) to also be used as
7272 escape values indicating the presence of the old format.
7274 The value returned via bytes_read should be used to increment the
7275 relevant pointer after calling read_initial_length().
7277 [ Note: read_initial_length() and read_offset() are based on the
7278 document entitled "DWARF Debugging Information Format", revision
7279 3, draft 8, dated November 19, 2001. This document was obtained
7282 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7284 This document is only a draft and is subject to change. (So beware.)
7286 Details regarding the older, non-standard 64-bit format were
7287 determined empirically by examining 64-bit ELF files produced by
7288 the SGI toolchain on an IRIX 6.5 machine.
7290 - Kevin, July 16, 2002
7294 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7296 LONGEST length
= bfd_get_32 (abfd
, buf
);
7298 if (length
== 0xffffffff)
7300 length
= bfd_get_64 (abfd
, buf
+ 4);
7303 else if (length
== 0)
7305 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7306 length
= bfd_get_64 (abfd
, buf
);
7317 /* Cover function for read_initial_length.
7318 Returns the length of the object at BUF, and stores the size of the
7319 initial length in *BYTES_READ and stores the size that offsets will be in
7321 If the initial length size is not equivalent to that specified in
7322 CU_HEADER then issue a complaint.
7323 This is useful when reading non-comp-unit headers. */
7326 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7327 const struct comp_unit_head
*cu_header
,
7328 unsigned int *bytes_read
,
7329 unsigned int *offset_size
)
7331 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7333 gdb_assert (cu_header
->initial_length_size
== 4
7334 || cu_header
->initial_length_size
== 8
7335 || cu_header
->initial_length_size
== 12);
7337 if (cu_header
->initial_length_size
!= *bytes_read
)
7338 complaint (&symfile_complaints
,
7339 _("intermixed 32-bit and 64-bit DWARF sections"));
7341 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7345 /* Read an offset from the data stream. The size of the offset is
7346 given by cu_header->offset_size. */
7349 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7350 unsigned int *bytes_read
)
7352 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7353 *bytes_read
= cu_header
->offset_size
;
7357 /* Read an offset from the data stream. */
7360 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7364 switch (offset_size
)
7367 retval
= bfd_get_32 (abfd
, buf
);
7370 retval
= bfd_get_64 (abfd
, buf
);
7373 internal_error (__FILE__
, __LINE__
,
7374 _("read_offset_1: bad switch [in module %s]"),
7375 bfd_get_filename (abfd
));
7382 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7384 /* If the size of a host char is 8 bits, we can return a pointer
7385 to the buffer, otherwise we have to copy the data to a buffer
7386 allocated on the temporary obstack. */
7387 gdb_assert (HOST_CHAR_BIT
== 8);
7392 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7394 /* If the size of a host char is 8 bits, we can return a pointer
7395 to the string, otherwise we have to copy the string to a buffer
7396 allocated on the temporary obstack. */
7397 gdb_assert (HOST_CHAR_BIT
== 8);
7400 *bytes_read_ptr
= 1;
7403 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7404 return (char *) buf
;
7408 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7409 const struct comp_unit_head
*cu_header
,
7410 unsigned int *bytes_read_ptr
)
7412 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7414 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7416 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7417 bfd_get_filename (abfd
));
7420 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7422 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7423 bfd_get_filename (abfd
));
7426 gdb_assert (HOST_CHAR_BIT
== 8);
7427 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7429 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7432 static unsigned long
7433 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7435 unsigned long result
;
7436 unsigned int num_read
;
7446 byte
= bfd_get_8 (abfd
, buf
);
7449 result
|= ((unsigned long)(byte
& 127) << shift
);
7450 if ((byte
& 128) == 0)
7456 *bytes_read_ptr
= num_read
;
7461 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7464 int i
, shift
, num_read
;
7473 byte
= bfd_get_8 (abfd
, buf
);
7476 result
|= ((long)(byte
& 127) << shift
);
7478 if ((byte
& 128) == 0)
7483 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7484 result
|= -(((long)1) << shift
);
7485 *bytes_read_ptr
= num_read
;
7489 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7492 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7498 byte
= bfd_get_8 (abfd
, buf
);
7500 if ((byte
& 128) == 0)
7506 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7513 cu
->language
= language_c
;
7515 case DW_LANG_C_plus_plus
:
7516 cu
->language
= language_cplus
;
7518 case DW_LANG_Fortran77
:
7519 case DW_LANG_Fortran90
:
7520 case DW_LANG_Fortran95
:
7521 cu
->language
= language_fortran
;
7523 case DW_LANG_Mips_Assembler
:
7524 cu
->language
= language_asm
;
7527 cu
->language
= language_java
;
7531 cu
->language
= language_ada
;
7533 case DW_LANG_Modula2
:
7534 cu
->language
= language_m2
;
7536 case DW_LANG_Pascal83
:
7537 cu
->language
= language_pascal
;
7540 cu
->language
= language_objc
;
7542 case DW_LANG_Cobol74
:
7543 case DW_LANG_Cobol85
:
7545 cu
->language
= language_minimal
;
7548 cu
->language_defn
= language_def (cu
->language
);
7551 /* Return the named attribute or NULL if not there. */
7553 static struct attribute
*
7554 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7557 struct attribute
*spec
= NULL
;
7559 for (i
= 0; i
< die
->num_attrs
; ++i
)
7561 if (die
->attrs
[i
].name
== name
)
7562 return &die
->attrs
[i
];
7563 if (die
->attrs
[i
].name
== DW_AT_specification
7564 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7565 spec
= &die
->attrs
[i
];
7570 die
= follow_die_ref (die
, spec
, &cu
);
7571 return dwarf2_attr (die
, name
, cu
);
7577 /* Return the named attribute or NULL if not there,
7578 but do not follow DW_AT_specification, etc.
7579 This is for use in contexts where we're reading .debug_types dies.
7580 Following DW_AT_specification, DW_AT_abstract_origin will take us
7581 back up the chain, and we want to go down. */
7583 static struct attribute
*
7584 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7585 struct dwarf2_cu
*cu
)
7589 for (i
= 0; i
< die
->num_attrs
; ++i
)
7590 if (die
->attrs
[i
].name
== name
)
7591 return &die
->attrs
[i
];
7596 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7597 and holds a non-zero value. This function should only be used for
7598 DW_FORM_flag attributes. */
7601 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7603 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7605 return (attr
&& DW_UNSND (attr
));
7609 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7611 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7612 which value is non-zero. However, we have to be careful with
7613 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7614 (via dwarf2_flag_true_p) follows this attribute. So we may
7615 end up accidently finding a declaration attribute that belongs
7616 to a different DIE referenced by the specification attribute,
7617 even though the given DIE does not have a declaration attribute. */
7618 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7619 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7622 /* Return the die giving the specification for DIE, if there is
7623 one. *SPEC_CU is the CU containing DIE on input, and the CU
7624 containing the return value on output. If there is no
7625 specification, but there is an abstract origin, that is
7628 static struct die_info
*
7629 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7631 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7634 if (spec_attr
== NULL
)
7635 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7637 if (spec_attr
== NULL
)
7640 return follow_die_ref (die
, spec_attr
, spec_cu
);
7643 /* Free the line_header structure *LH, and any arrays and strings it
7646 free_line_header (struct line_header
*lh
)
7648 if (lh
->standard_opcode_lengths
)
7649 xfree (lh
->standard_opcode_lengths
);
7651 /* Remember that all the lh->file_names[i].name pointers are
7652 pointers into debug_line_buffer, and don't need to be freed. */
7654 xfree (lh
->file_names
);
7656 /* Similarly for the include directory names. */
7657 if (lh
->include_dirs
)
7658 xfree (lh
->include_dirs
);
7664 /* Add an entry to LH's include directory table. */
7666 add_include_dir (struct line_header
*lh
, char *include_dir
)
7668 /* Grow the array if necessary. */
7669 if (lh
->include_dirs_size
== 0)
7671 lh
->include_dirs_size
= 1; /* for testing */
7672 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7673 * sizeof (*lh
->include_dirs
));
7675 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7677 lh
->include_dirs_size
*= 2;
7678 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7679 (lh
->include_dirs_size
7680 * sizeof (*lh
->include_dirs
)));
7683 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7687 /* Add an entry to LH's file name table. */
7689 add_file_name (struct line_header
*lh
,
7691 unsigned int dir_index
,
7692 unsigned int mod_time
,
7693 unsigned int length
)
7695 struct file_entry
*fe
;
7697 /* Grow the array if necessary. */
7698 if (lh
->file_names_size
== 0)
7700 lh
->file_names_size
= 1; /* for testing */
7701 lh
->file_names
= xmalloc (lh
->file_names_size
7702 * sizeof (*lh
->file_names
));
7704 else if (lh
->num_file_names
>= lh
->file_names_size
)
7706 lh
->file_names_size
*= 2;
7707 lh
->file_names
= xrealloc (lh
->file_names
,
7708 (lh
->file_names_size
7709 * sizeof (*lh
->file_names
)));
7712 fe
= &lh
->file_names
[lh
->num_file_names
++];
7714 fe
->dir_index
= dir_index
;
7715 fe
->mod_time
= mod_time
;
7716 fe
->length
= length
;
7722 /* Read the statement program header starting at OFFSET in
7723 .debug_line, according to the endianness of ABFD. Return a pointer
7724 to a struct line_header, allocated using xmalloc.
7726 NOTE: the strings in the include directory and file name tables of
7727 the returned object point into debug_line_buffer, and must not be
7729 static struct line_header
*
7730 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7731 struct dwarf2_cu
*cu
)
7733 struct cleanup
*back_to
;
7734 struct line_header
*lh
;
7736 unsigned int bytes_read
, offset_size
;
7738 char *cur_dir
, *cur_file
;
7740 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7742 complaint (&symfile_complaints
, _("missing .debug_line section"));
7746 /* Make sure that at least there's room for the total_length field.
7747 That could be 12 bytes long, but we're just going to fudge that. */
7748 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7750 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7754 lh
= xmalloc (sizeof (*lh
));
7755 memset (lh
, 0, sizeof (*lh
));
7756 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7759 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7761 /* Read in the header. */
7763 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7764 &bytes_read
, &offset_size
);
7765 line_ptr
+= bytes_read
;
7766 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7767 + dwarf2_per_objfile
->line
.size
))
7769 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7772 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7773 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7775 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7776 line_ptr
+= offset_size
;
7777 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7779 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7781 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7783 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7785 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7787 lh
->standard_opcode_lengths
7788 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7790 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7791 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7793 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7797 /* Read directory table. */
7798 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7800 line_ptr
+= bytes_read
;
7801 add_include_dir (lh
, cur_dir
);
7803 line_ptr
+= bytes_read
;
7805 /* Read file name table. */
7806 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7808 unsigned int dir_index
, mod_time
, length
;
7810 line_ptr
+= bytes_read
;
7811 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7812 line_ptr
+= bytes_read
;
7813 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7814 line_ptr
+= bytes_read
;
7815 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7816 line_ptr
+= bytes_read
;
7818 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7820 line_ptr
+= bytes_read
;
7821 lh
->statement_program_start
= line_ptr
;
7823 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7824 + dwarf2_per_objfile
->line
.size
))
7825 complaint (&symfile_complaints
,
7826 _("line number info header doesn't fit in `.debug_line' section"));
7828 discard_cleanups (back_to
);
7832 /* This function exists to work around a bug in certain compilers
7833 (particularly GCC 2.95), in which the first line number marker of a
7834 function does not show up until after the prologue, right before
7835 the second line number marker. This function shifts ADDRESS down
7836 to the beginning of the function if necessary, and is called on
7837 addresses passed to record_line. */
7840 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7842 struct function_range
*fn
;
7844 /* Find the function_range containing address. */
7849 cu
->cached_fn
= cu
->first_fn
;
7853 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7859 while (fn
&& fn
!= cu
->cached_fn
)
7860 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7870 if (address
!= fn
->lowpc
)
7871 complaint (&symfile_complaints
,
7872 _("misplaced first line number at 0x%lx for '%s'"),
7873 (unsigned long) address
, fn
->name
);
7878 /* Decode the Line Number Program (LNP) for the given line_header
7879 structure and CU. The actual information extracted and the type
7880 of structures created from the LNP depends on the value of PST.
7882 1. If PST is NULL, then this procedure uses the data from the program
7883 to create all necessary symbol tables, and their linetables.
7884 The compilation directory of the file is passed in COMP_DIR,
7885 and must not be NULL.
7887 2. If PST is not NULL, this procedure reads the program to determine
7888 the list of files included by the unit represented by PST, and
7889 builds all the associated partial symbol tables. In this case,
7890 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7891 is not used to compute the full name of the symtab, and therefore
7892 omitting it when building the partial symtab does not introduce
7893 the potential for inconsistency - a partial symtab and its associated
7894 symbtab having a different fullname -). */
7897 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7898 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7900 gdb_byte
*line_ptr
, *extended_end
;
7902 unsigned int bytes_read
, extended_len
;
7903 unsigned char op_code
, extended_op
, adj_opcode
;
7905 struct objfile
*objfile
= cu
->objfile
;
7906 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7907 const int decode_for_pst_p
= (pst
!= NULL
);
7908 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7910 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7912 line_ptr
= lh
->statement_program_start
;
7913 line_end
= lh
->statement_program_end
;
7915 /* Read the statement sequences until there's nothing left. */
7916 while (line_ptr
< line_end
)
7918 /* state machine registers */
7919 CORE_ADDR address
= 0;
7920 unsigned int file
= 1;
7921 unsigned int line
= 1;
7922 unsigned int column
= 0;
7923 int is_stmt
= lh
->default_is_stmt
;
7924 int basic_block
= 0;
7925 int end_sequence
= 0;
7928 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7930 /* Start a subfile for the current file of the state machine. */
7931 /* lh->include_dirs and lh->file_names are 0-based, but the
7932 directory and file name numbers in the statement program
7934 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7938 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7940 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7943 /* Decode the table. */
7944 while (!end_sequence
)
7946 op_code
= read_1_byte (abfd
, line_ptr
);
7948 if (line_ptr
> line_end
)
7950 dwarf2_debug_line_missing_end_sequence_complaint ();
7954 if (op_code
>= lh
->opcode_base
)
7956 /* Special operand. */
7957 adj_opcode
= op_code
- lh
->opcode_base
;
7958 address
+= (adj_opcode
/ lh
->line_range
)
7959 * lh
->minimum_instruction_length
;
7960 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7961 if (lh
->num_file_names
< file
|| file
== 0)
7962 dwarf2_debug_line_missing_file_complaint ();
7965 lh
->file_names
[file
- 1].included_p
= 1;
7966 if (!decode_for_pst_p
&& is_stmt
)
7968 if (last_subfile
!= current_subfile
)
7970 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7972 record_line (last_subfile
, 0, addr
);
7973 last_subfile
= current_subfile
;
7975 /* Append row to matrix using current values. */
7976 addr
= check_cu_functions (address
, cu
);
7977 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7978 record_line (current_subfile
, line
, addr
);
7983 else switch (op_code
)
7985 case DW_LNS_extended_op
:
7986 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7987 line_ptr
+= bytes_read
;
7988 extended_end
= line_ptr
+ extended_len
;
7989 extended_op
= read_1_byte (abfd
, line_ptr
);
7991 switch (extended_op
)
7993 case DW_LNE_end_sequence
:
7996 case DW_LNE_set_address
:
7997 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7998 line_ptr
+= bytes_read
;
7999 address
+= baseaddr
;
8001 case DW_LNE_define_file
:
8004 unsigned int dir_index
, mod_time
, length
;
8006 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8007 line_ptr
+= bytes_read
;
8009 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8010 line_ptr
+= bytes_read
;
8012 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8013 line_ptr
+= bytes_read
;
8015 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8016 line_ptr
+= bytes_read
;
8017 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8020 case DW_LNE_set_discriminator
:
8021 /* The discriminator is not interesting to the debugger;
8023 line_ptr
= extended_end
;
8026 complaint (&symfile_complaints
,
8027 _("mangled .debug_line section"));
8030 /* Make sure that we parsed the extended op correctly. If e.g.
8031 we expected a different address size than the producer used,
8032 we may have read the wrong number of bytes. */
8033 if (line_ptr
!= extended_end
)
8035 complaint (&symfile_complaints
,
8036 _("mangled .debug_line section"));
8041 if (lh
->num_file_names
< file
|| file
== 0)
8042 dwarf2_debug_line_missing_file_complaint ();
8045 lh
->file_names
[file
- 1].included_p
= 1;
8046 if (!decode_for_pst_p
&& is_stmt
)
8048 if (last_subfile
!= current_subfile
)
8050 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8052 record_line (last_subfile
, 0, addr
);
8053 last_subfile
= current_subfile
;
8055 addr
= check_cu_functions (address
, cu
);
8056 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8057 record_line (current_subfile
, line
, addr
);
8062 case DW_LNS_advance_pc
:
8063 address
+= lh
->minimum_instruction_length
8064 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8065 line_ptr
+= bytes_read
;
8067 case DW_LNS_advance_line
:
8068 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8069 line_ptr
+= bytes_read
;
8071 case DW_LNS_set_file
:
8073 /* The arrays lh->include_dirs and lh->file_names are
8074 0-based, but the directory and file name numbers in
8075 the statement program are 1-based. */
8076 struct file_entry
*fe
;
8079 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8080 line_ptr
+= bytes_read
;
8081 if (lh
->num_file_names
< file
|| file
== 0)
8082 dwarf2_debug_line_missing_file_complaint ();
8085 fe
= &lh
->file_names
[file
- 1];
8087 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8088 if (!decode_for_pst_p
)
8090 last_subfile
= current_subfile
;
8091 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8096 case DW_LNS_set_column
:
8097 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8098 line_ptr
+= bytes_read
;
8100 case DW_LNS_negate_stmt
:
8101 is_stmt
= (!is_stmt
);
8103 case DW_LNS_set_basic_block
:
8106 /* Add to the address register of the state machine the
8107 address increment value corresponding to special opcode
8108 255. I.e., this value is scaled by the minimum
8109 instruction length since special opcode 255 would have
8110 scaled the the increment. */
8111 case DW_LNS_const_add_pc
:
8112 address
+= (lh
->minimum_instruction_length
8113 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8115 case DW_LNS_fixed_advance_pc
:
8116 address
+= read_2_bytes (abfd
, line_ptr
);
8121 /* Unknown standard opcode, ignore it. */
8124 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8126 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8127 line_ptr
+= bytes_read
;
8132 if (lh
->num_file_names
< file
|| file
== 0)
8133 dwarf2_debug_line_missing_file_complaint ();
8136 lh
->file_names
[file
- 1].included_p
= 1;
8137 if (!decode_for_pst_p
)
8139 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8140 record_line (current_subfile
, 0, addr
);
8145 if (decode_for_pst_p
)
8149 /* Now that we're done scanning the Line Header Program, we can
8150 create the psymtab of each included file. */
8151 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8152 if (lh
->file_names
[file_index
].included_p
== 1)
8154 const struct file_entry fe
= lh
->file_names
[file_index
];
8155 char *include_name
= fe
.name
;
8156 char *dir_name
= NULL
;
8157 char *pst_filename
= pst
->filename
;
8160 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8162 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8164 include_name
= concat (dir_name
, SLASH_STRING
,
8165 include_name
, (char *)NULL
);
8166 make_cleanup (xfree
, include_name
);
8169 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8171 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8172 pst_filename
, (char *)NULL
);
8173 make_cleanup (xfree
, pst_filename
);
8176 if (strcmp (include_name
, pst_filename
) != 0)
8177 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8182 /* Make sure a symtab is created for every file, even files
8183 which contain only variables (i.e. no code with associated
8187 struct file_entry
*fe
;
8189 for (i
= 0; i
< lh
->num_file_names
; i
++)
8192 fe
= &lh
->file_names
[i
];
8194 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8195 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8197 /* Skip the main file; we don't need it, and it must be
8198 allocated last, so that it will show up before the
8199 non-primary symtabs in the objfile's symtab list. */
8200 if (current_subfile
== first_subfile
)
8203 if (current_subfile
->symtab
== NULL
)
8204 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8206 fe
->symtab
= current_subfile
->symtab
;
8211 /* Start a subfile for DWARF. FILENAME is the name of the file and
8212 DIRNAME the name of the source directory which contains FILENAME
8213 or NULL if not known. COMP_DIR is the compilation directory for the
8214 linetable's compilation unit or NULL if not known.
8215 This routine tries to keep line numbers from identical absolute and
8216 relative file names in a common subfile.
8218 Using the `list' example from the GDB testsuite, which resides in
8219 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8220 of /srcdir/list0.c yields the following debugging information for list0.c:
8222 DW_AT_name: /srcdir/list0.c
8223 DW_AT_comp_dir: /compdir
8224 files.files[0].name: list0.h
8225 files.files[0].dir: /srcdir
8226 files.files[1].name: list0.c
8227 files.files[1].dir: /srcdir
8229 The line number information for list0.c has to end up in a single
8230 subfile, so that `break /srcdir/list0.c:1' works as expected.
8231 start_subfile will ensure that this happens provided that we pass the
8232 concatenation of files.files[1].dir and files.files[1].name as the
8236 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8240 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8241 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8242 second argument to start_subfile. To be consistent, we do the
8243 same here. In order not to lose the line information directory,
8244 we concatenate it to the filename when it makes sense.
8245 Note that the Dwarf3 standard says (speaking of filenames in line
8246 information): ``The directory index is ignored for file names
8247 that represent full path names''. Thus ignoring dirname in the
8248 `else' branch below isn't an issue. */
8250 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8251 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8253 fullname
= filename
;
8255 start_subfile (fullname
, comp_dir
);
8257 if (fullname
!= filename
)
8262 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8263 struct dwarf2_cu
*cu
)
8265 struct objfile
*objfile
= cu
->objfile
;
8266 struct comp_unit_head
*cu_header
= &cu
->header
;
8268 /* NOTE drow/2003-01-30: There used to be a comment and some special
8269 code here to turn a symbol with DW_AT_external and a
8270 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8271 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8272 with some versions of binutils) where shared libraries could have
8273 relocations against symbols in their debug information - the
8274 minimal symbol would have the right address, but the debug info
8275 would not. It's no longer necessary, because we will explicitly
8276 apply relocations when we read in the debug information now. */
8278 /* A DW_AT_location attribute with no contents indicates that a
8279 variable has been optimized away. */
8280 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8282 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8286 /* Handle one degenerate form of location expression specially, to
8287 preserve GDB's previous behavior when section offsets are
8288 specified. If this is just a DW_OP_addr then mark this symbol
8291 if (attr_form_is_block (attr
)
8292 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8293 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8297 SYMBOL_VALUE_ADDRESS (sym
) =
8298 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8299 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8300 fixup_symbol_section (sym
, objfile
);
8301 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8302 SYMBOL_SECTION (sym
));
8306 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8307 expression evaluator, and use LOC_COMPUTED only when necessary
8308 (i.e. when the value of a register or memory location is
8309 referenced, or a thread-local block, etc.). Then again, it might
8310 not be worthwhile. I'm assuming that it isn't unless performance
8311 or memory numbers show me otherwise. */
8313 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8314 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8317 /* Given a pointer to a DWARF information entry, figure out if we need
8318 to make a symbol table entry for it, and if so, create a new entry
8319 and return a pointer to it.
8320 If TYPE is NULL, determine symbol type from the die, otherwise
8321 used the passed type. */
8323 static struct symbol
*
8324 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8326 struct objfile
*objfile
= cu
->objfile
;
8327 struct symbol
*sym
= NULL
;
8329 struct attribute
*attr
= NULL
;
8330 struct attribute
*attr2
= NULL
;
8332 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8334 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8336 if (die
->tag
!= DW_TAG_namespace
)
8337 name
= dwarf2_linkage_name (die
, cu
);
8339 name
= TYPE_NAME (type
);
8343 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8344 sizeof (struct symbol
));
8345 OBJSTAT (objfile
, n_syms
++);
8346 memset (sym
, 0, sizeof (struct symbol
));
8348 /* Cache this symbol's name and the name's demangled form (if any). */
8349 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8350 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 0, objfile
);
8352 /* Default assumptions.
8353 Use the passed type or decode it from the die. */
8354 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8355 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8357 SYMBOL_TYPE (sym
) = type
;
8359 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8360 attr
= dwarf2_attr (die
,
8361 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8365 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8368 attr
= dwarf2_attr (die
,
8369 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8373 int file_index
= DW_UNSND (attr
);
8374 if (cu
->line_header
== NULL
8375 || file_index
> cu
->line_header
->num_file_names
)
8376 complaint (&symfile_complaints
,
8377 _("file index out of range"));
8378 else if (file_index
> 0)
8380 struct file_entry
*fe
;
8381 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8382 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8389 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8392 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8394 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8396 case DW_TAG_subprogram
:
8397 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8399 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8400 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8401 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8402 || cu
->language
== language_ada
)
8404 /* Subprograms marked external are stored as a global symbol.
8405 Ada subprograms, whether marked external or not, are always
8406 stored as a global symbol, because we want to be able to
8407 access them globally. For instance, we want to be able
8408 to break on a nested subprogram without having to
8409 specify the context. */
8410 add_symbol_to_list (sym
, &global_symbols
);
8414 add_symbol_to_list (sym
, cu
->list_in_scope
);
8417 case DW_TAG_inlined_subroutine
:
8418 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8420 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8421 SYMBOL_INLINED (sym
) = 1;
8422 /* Do not add the symbol to any lists. It will be found via
8423 BLOCK_FUNCTION from the blockvector. */
8425 case DW_TAG_variable
:
8426 /* Compilation with minimal debug info may result in variables
8427 with missing type entries. Change the misleading `void' type
8428 to something sensible. */
8429 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8431 = objfile_type (objfile
)->nodebug_data_symbol
;
8433 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8436 dwarf2_const_value (attr
, sym
, cu
);
8437 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8438 if (attr2
&& (DW_UNSND (attr2
) != 0))
8439 add_symbol_to_list (sym
, &global_symbols
);
8441 add_symbol_to_list (sym
, cu
->list_in_scope
);
8444 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8447 var_decode_location (attr
, sym
, cu
);
8448 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8449 if (attr2
&& (DW_UNSND (attr2
) != 0))
8450 add_symbol_to_list (sym
, &global_symbols
);
8452 add_symbol_to_list (sym
, cu
->list_in_scope
);
8456 /* We do not know the address of this symbol.
8457 If it is an external symbol and we have type information
8458 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8459 The address of the variable will then be determined from
8460 the minimal symbol table whenever the variable is
8462 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8463 if (attr2
&& (DW_UNSND (attr2
) != 0)
8464 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8466 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8467 add_symbol_to_list (sym
, cu
->list_in_scope
);
8469 else if (!die_is_declaration (die
, cu
))
8471 /* Use the default LOC_OPTIMIZED_OUT class. */
8472 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8473 add_symbol_to_list (sym
, cu
->list_in_scope
);
8477 case DW_TAG_formal_parameter
:
8478 /* If we are inside a function, mark this as an argument. If
8479 not, we might be looking at an argument to an inlined function
8480 when we do not have enough information to show inlined frames;
8481 pretend it's a local variable in that case so that the user can
8483 if (context_stack_depth
> 0
8484 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8485 SYMBOL_IS_ARGUMENT (sym
) = 1;
8486 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8489 var_decode_location (attr
, sym
, cu
);
8491 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8494 dwarf2_const_value (attr
, sym
, cu
);
8496 add_symbol_to_list (sym
, cu
->list_in_scope
);
8498 case DW_TAG_unspecified_parameters
:
8499 /* From varargs functions; gdb doesn't seem to have any
8500 interest in this information, so just ignore it for now.
8503 case DW_TAG_class_type
:
8504 case DW_TAG_interface_type
:
8505 case DW_TAG_structure_type
:
8506 case DW_TAG_union_type
:
8507 case DW_TAG_set_type
:
8508 case DW_TAG_enumeration_type
:
8509 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8510 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8512 /* Make sure that the symbol includes appropriate enclosing
8513 classes/namespaces in its name. These are calculated in
8514 read_structure_type, and the correct name is saved in
8517 if (cu
->language
== language_cplus
8518 || cu
->language
== language_java
)
8520 struct type
*type
= SYMBOL_TYPE (sym
);
8522 if (TYPE_TAG_NAME (type
) != NULL
)
8524 /* FIXME: carlton/2003-11-10: Should this use
8525 SYMBOL_SET_NAMES instead? (The same problem also
8526 arises further down in this function.) */
8527 /* The type's name is already allocated along with
8528 this objfile, so we don't need to duplicate it
8530 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8535 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8536 really ever be static objects: otherwise, if you try
8537 to, say, break of a class's method and you're in a file
8538 which doesn't mention that class, it won't work unless
8539 the check for all static symbols in lookup_symbol_aux
8540 saves you. See the OtherFileClass tests in
8541 gdb.c++/namespace.exp. */
8543 struct pending
**list_to_add
;
8545 list_to_add
= (cu
->list_in_scope
== &file_symbols
8546 && (cu
->language
== language_cplus
8547 || cu
->language
== language_java
)
8548 ? &global_symbols
: cu
->list_in_scope
);
8550 add_symbol_to_list (sym
, list_to_add
);
8552 /* The semantics of C++ state that "struct foo { ... }" also
8553 defines a typedef for "foo". A Java class declaration also
8554 defines a typedef for the class. */
8555 if (cu
->language
== language_cplus
8556 || cu
->language
== language_java
8557 || cu
->language
== language_ada
)
8559 /* The symbol's name is already allocated along with
8560 this objfile, so we don't need to duplicate it for
8562 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8563 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8567 case DW_TAG_typedef
:
8568 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8569 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8570 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8571 add_symbol_to_list (sym
, cu
->list_in_scope
);
8573 case DW_TAG_base_type
:
8574 case DW_TAG_subrange_type
:
8575 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8576 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8577 add_symbol_to_list (sym
, cu
->list_in_scope
);
8579 case DW_TAG_enumerator
:
8580 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8581 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8584 dwarf2_const_value (attr
, sym
, cu
);
8587 /* NOTE: carlton/2003-11-10: See comment above in the
8588 DW_TAG_class_type, etc. block. */
8590 struct pending
**list_to_add
;
8592 list_to_add
= (cu
->list_in_scope
== &file_symbols
8593 && (cu
->language
== language_cplus
8594 || cu
->language
== language_java
)
8595 ? &global_symbols
: cu
->list_in_scope
);
8597 add_symbol_to_list (sym
, list_to_add
);
8600 case DW_TAG_namespace
:
8601 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8602 add_symbol_to_list (sym
, &global_symbols
);
8605 /* Not a tag we recognize. Hopefully we aren't processing
8606 trash data, but since we must specifically ignore things
8607 we don't recognize, there is nothing else we should do at
8609 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8610 dwarf_tag_name (die
->tag
));
8614 /* For the benefit of old versions of GCC, check for anonymous
8615 namespaces based on the demangled name. */
8616 if (!processing_has_namespace_info
8617 && cu
->language
== language_cplus
8618 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8619 cp_scan_for_anonymous_namespaces (sym
);
8624 /* Copy constant value from an attribute to a symbol. */
8627 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8628 struct dwarf2_cu
*cu
)
8630 struct objfile
*objfile
= cu
->objfile
;
8631 struct comp_unit_head
*cu_header
= &cu
->header
;
8632 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8633 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8634 struct dwarf_block
*blk
;
8639 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8640 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8641 cu_header
->addr_size
,
8642 TYPE_LENGTH (SYMBOL_TYPE
8644 SYMBOL_VALUE_BYTES (sym
) =
8645 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8646 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8647 it's body - store_unsigned_integer. */
8648 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8649 byte_order
, DW_ADDR (attr
));
8650 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8652 case DW_FORM_string
:
8654 /* DW_STRING is already allocated on the obstack, point directly
8656 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8657 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8659 case DW_FORM_block1
:
8660 case DW_FORM_block2
:
8661 case DW_FORM_block4
:
8663 blk
= DW_BLOCK (attr
);
8664 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8665 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8667 TYPE_LENGTH (SYMBOL_TYPE
8669 SYMBOL_VALUE_BYTES (sym
) =
8670 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8671 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8672 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8675 /* The DW_AT_const_value attributes are supposed to carry the
8676 symbol's value "represented as it would be on the target
8677 architecture." By the time we get here, it's already been
8678 converted to host endianness, so we just need to sign- or
8679 zero-extend it as appropriate. */
8681 dwarf2_const_value_data (attr
, sym
, 8);
8684 dwarf2_const_value_data (attr
, sym
, 16);
8687 dwarf2_const_value_data (attr
, sym
, 32);
8690 dwarf2_const_value_data (attr
, sym
, 64);
8694 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8695 SYMBOL_CLASS (sym
) = LOC_CONST
;
8699 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8700 SYMBOL_CLASS (sym
) = LOC_CONST
;
8704 complaint (&symfile_complaints
,
8705 _("unsupported const value attribute form: '%s'"),
8706 dwarf_form_name (attr
->form
));
8707 SYMBOL_VALUE (sym
) = 0;
8708 SYMBOL_CLASS (sym
) = LOC_CONST
;
8714 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8715 or zero-extend it as appropriate for the symbol's type. */
8717 dwarf2_const_value_data (struct attribute
*attr
,
8721 LONGEST l
= DW_UNSND (attr
);
8723 if (bits
< sizeof (l
) * 8)
8725 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8726 l
&= ((LONGEST
) 1 << bits
) - 1;
8728 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8731 SYMBOL_VALUE (sym
) = l
;
8732 SYMBOL_CLASS (sym
) = LOC_CONST
;
8736 /* Return the type of the die in question using its DW_AT_type attribute. */
8738 static struct type
*
8739 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8742 struct attribute
*type_attr
;
8743 struct die_info
*type_die
;
8745 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8748 /* A missing DW_AT_type represents a void type. */
8749 return objfile_type (cu
->objfile
)->builtin_void
;
8752 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8754 type
= tag_type_to_type (type_die
, cu
);
8757 dump_die_for_error (type_die
);
8758 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8764 /* Return the containing type of the die in question using its
8765 DW_AT_containing_type attribute. */
8767 static struct type
*
8768 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8770 struct type
*type
= NULL
;
8771 struct attribute
*type_attr
;
8772 struct die_info
*type_die
= NULL
;
8774 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8777 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8778 type
= tag_type_to_type (type_die
, cu
);
8783 dump_die_for_error (type_die
);
8784 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8790 static struct type
*
8791 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8793 struct type
*this_type
;
8795 this_type
= read_type_die (die
, cu
);
8798 dump_die_for_error (die
);
8799 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8805 static struct type
*
8806 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8808 struct type
*this_type
;
8810 this_type
= get_die_type (die
, cu
);
8816 case DW_TAG_class_type
:
8817 case DW_TAG_interface_type
:
8818 case DW_TAG_structure_type
:
8819 case DW_TAG_union_type
:
8820 this_type
= read_structure_type (die
, cu
);
8822 case DW_TAG_enumeration_type
:
8823 this_type
= read_enumeration_type (die
, cu
);
8825 case DW_TAG_subprogram
:
8826 case DW_TAG_subroutine_type
:
8827 case DW_TAG_inlined_subroutine
:
8828 this_type
= read_subroutine_type (die
, cu
);
8830 case DW_TAG_array_type
:
8831 this_type
= read_array_type (die
, cu
);
8833 case DW_TAG_set_type
:
8834 this_type
= read_set_type (die
, cu
);
8836 case DW_TAG_pointer_type
:
8837 this_type
= read_tag_pointer_type (die
, cu
);
8839 case DW_TAG_ptr_to_member_type
:
8840 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8842 case DW_TAG_reference_type
:
8843 this_type
= read_tag_reference_type (die
, cu
);
8845 case DW_TAG_const_type
:
8846 this_type
= read_tag_const_type (die
, cu
);
8848 case DW_TAG_volatile_type
:
8849 this_type
= read_tag_volatile_type (die
, cu
);
8851 case DW_TAG_string_type
:
8852 this_type
= read_tag_string_type (die
, cu
);
8854 case DW_TAG_typedef
:
8855 this_type
= read_typedef (die
, cu
);
8857 case DW_TAG_subrange_type
:
8858 this_type
= read_subrange_type (die
, cu
);
8860 case DW_TAG_base_type
:
8861 this_type
= read_base_type (die
, cu
);
8863 case DW_TAG_unspecified_type
:
8864 this_type
= read_unspecified_type (die
, cu
);
8866 case DW_TAG_namespace
:
8867 this_type
= read_namespace_type (die
, cu
);
8870 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8871 dwarf_tag_name (die
->tag
));
8878 /* Return the name of the namespace/class that DIE is defined within,
8879 or "" if we can't tell. The caller should not xfree the result.
8881 For example, if we're within the method foo() in the following
8891 then determine_prefix on foo's die will return "N::C". */
8894 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8896 struct die_info
*parent
, *spec_die
;
8897 struct dwarf2_cu
*spec_cu
;
8898 struct type
*parent_type
;
8900 if (cu
->language
!= language_cplus
8901 && cu
->language
!= language_java
)
8904 /* We have to be careful in the presence of DW_AT_specification.
8905 For example, with GCC 3.4, given the code
8909 // Definition of N::foo.
8913 then we'll have a tree of DIEs like this:
8915 1: DW_TAG_compile_unit
8916 2: DW_TAG_namespace // N
8917 3: DW_TAG_subprogram // declaration of N::foo
8918 4: DW_TAG_subprogram // definition of N::foo
8919 DW_AT_specification // refers to die #3
8921 Thus, when processing die #4, we have to pretend that we're in
8922 the context of its DW_AT_specification, namely the contex of die
8925 spec_die
= die_specification (die
, &spec_cu
);
8926 if (spec_die
== NULL
)
8927 parent
= die
->parent
;
8930 parent
= spec_die
->parent
;
8937 switch (parent
->tag
)
8939 case DW_TAG_namespace
:
8940 parent_type
= read_type_die (parent
, cu
);
8941 /* We give a name to even anonymous namespaces. */
8942 return TYPE_TAG_NAME (parent_type
);
8943 case DW_TAG_class_type
:
8944 case DW_TAG_interface_type
:
8945 case DW_TAG_structure_type
:
8946 case DW_TAG_union_type
:
8947 parent_type
= read_type_die (parent
, cu
);
8948 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8949 return TYPE_TAG_NAME (parent_type
);
8951 /* An anonymous structure is only allowed non-static data
8952 members; no typedefs, no member functions, et cetera.
8953 So it does not need a prefix. */
8956 return determine_prefix (parent
, cu
);
8960 /* Return a newly-allocated string formed by concatenating PREFIX and
8961 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8962 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8963 perform an obconcat, otherwise allocate storage for the result. The CU argument
8964 is used to determine the language and hence, the appropriate separator. */
8966 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8969 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8970 struct dwarf2_cu
*cu
)
8974 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8976 else if (cu
->language
== language_java
)
8988 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8989 strcpy (retval
, prefix
);
8990 strcat (retval
, sep
);
8991 strcat (retval
, suffix
);
8996 /* We have an obstack. */
8997 return obconcat (obs
, prefix
, sep
, suffix
);
9001 /* Return sibling of die, NULL if no sibling. */
9003 static struct die_info
*
9004 sibling_die (struct die_info
*die
)
9006 return die
->sibling
;
9009 /* Get linkage name of a die, return NULL if not found. */
9012 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9014 struct attribute
*attr
;
9016 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9017 if (attr
&& DW_STRING (attr
))
9018 return DW_STRING (attr
);
9019 return dwarf2_name (die
, cu
);
9022 /* Get name of a die, return NULL if not found. */
9025 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9026 struct obstack
*obstack
)
9028 if (name
&& cu
->language
== language_cplus
)
9030 char *canon_name
= cp_canonicalize_string (name
);
9032 if (canon_name
!= NULL
)
9034 if (strcmp (canon_name
, name
) != 0)
9035 name
= obsavestring (canon_name
, strlen (canon_name
),
9044 /* Get name of a die, return NULL if not found. */
9047 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9049 struct attribute
*attr
;
9051 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9052 if (!attr
|| !DW_STRING (attr
))
9057 case DW_TAG_compile_unit
:
9058 /* Compilation units have a DW_AT_name that is a filename, not
9059 a source language identifier. */
9060 case DW_TAG_enumeration_type
:
9061 case DW_TAG_enumerator
:
9062 /* These tags always have simple identifiers already; no need
9063 to canonicalize them. */
9064 return DW_STRING (attr
);
9066 if (!DW_STRING_IS_CANONICAL (attr
))
9069 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9070 &cu
->objfile
->objfile_obstack
);
9071 DW_STRING_IS_CANONICAL (attr
) = 1;
9073 return DW_STRING (attr
);
9077 /* Return the die that this die in an extension of, or NULL if there
9078 is none. *EXT_CU is the CU containing DIE on input, and the CU
9079 containing the return value on output. */
9081 static struct die_info
*
9082 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9084 struct attribute
*attr
;
9086 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9090 return follow_die_ref (die
, attr
, ext_cu
);
9093 /* Convert a DIE tag into its string name. */
9096 dwarf_tag_name (unsigned tag
)
9100 case DW_TAG_padding
:
9101 return "DW_TAG_padding";
9102 case DW_TAG_array_type
:
9103 return "DW_TAG_array_type";
9104 case DW_TAG_class_type
:
9105 return "DW_TAG_class_type";
9106 case DW_TAG_entry_point
:
9107 return "DW_TAG_entry_point";
9108 case DW_TAG_enumeration_type
:
9109 return "DW_TAG_enumeration_type";
9110 case DW_TAG_formal_parameter
:
9111 return "DW_TAG_formal_parameter";
9112 case DW_TAG_imported_declaration
:
9113 return "DW_TAG_imported_declaration";
9115 return "DW_TAG_label";
9116 case DW_TAG_lexical_block
:
9117 return "DW_TAG_lexical_block";
9119 return "DW_TAG_member";
9120 case DW_TAG_pointer_type
:
9121 return "DW_TAG_pointer_type";
9122 case DW_TAG_reference_type
:
9123 return "DW_TAG_reference_type";
9124 case DW_TAG_compile_unit
:
9125 return "DW_TAG_compile_unit";
9126 case DW_TAG_string_type
:
9127 return "DW_TAG_string_type";
9128 case DW_TAG_structure_type
:
9129 return "DW_TAG_structure_type";
9130 case DW_TAG_subroutine_type
:
9131 return "DW_TAG_subroutine_type";
9132 case DW_TAG_typedef
:
9133 return "DW_TAG_typedef";
9134 case DW_TAG_union_type
:
9135 return "DW_TAG_union_type";
9136 case DW_TAG_unspecified_parameters
:
9137 return "DW_TAG_unspecified_parameters";
9138 case DW_TAG_variant
:
9139 return "DW_TAG_variant";
9140 case DW_TAG_common_block
:
9141 return "DW_TAG_common_block";
9142 case DW_TAG_common_inclusion
:
9143 return "DW_TAG_common_inclusion";
9144 case DW_TAG_inheritance
:
9145 return "DW_TAG_inheritance";
9146 case DW_TAG_inlined_subroutine
:
9147 return "DW_TAG_inlined_subroutine";
9149 return "DW_TAG_module";
9150 case DW_TAG_ptr_to_member_type
:
9151 return "DW_TAG_ptr_to_member_type";
9152 case DW_TAG_set_type
:
9153 return "DW_TAG_set_type";
9154 case DW_TAG_subrange_type
:
9155 return "DW_TAG_subrange_type";
9156 case DW_TAG_with_stmt
:
9157 return "DW_TAG_with_stmt";
9158 case DW_TAG_access_declaration
:
9159 return "DW_TAG_access_declaration";
9160 case DW_TAG_base_type
:
9161 return "DW_TAG_base_type";
9162 case DW_TAG_catch_block
:
9163 return "DW_TAG_catch_block";
9164 case DW_TAG_const_type
:
9165 return "DW_TAG_const_type";
9166 case DW_TAG_constant
:
9167 return "DW_TAG_constant";
9168 case DW_TAG_enumerator
:
9169 return "DW_TAG_enumerator";
9170 case DW_TAG_file_type
:
9171 return "DW_TAG_file_type";
9173 return "DW_TAG_friend";
9174 case DW_TAG_namelist
:
9175 return "DW_TAG_namelist";
9176 case DW_TAG_namelist_item
:
9177 return "DW_TAG_namelist_item";
9178 case DW_TAG_packed_type
:
9179 return "DW_TAG_packed_type";
9180 case DW_TAG_subprogram
:
9181 return "DW_TAG_subprogram";
9182 case DW_TAG_template_type_param
:
9183 return "DW_TAG_template_type_param";
9184 case DW_TAG_template_value_param
:
9185 return "DW_TAG_template_value_param";
9186 case DW_TAG_thrown_type
:
9187 return "DW_TAG_thrown_type";
9188 case DW_TAG_try_block
:
9189 return "DW_TAG_try_block";
9190 case DW_TAG_variant_part
:
9191 return "DW_TAG_variant_part";
9192 case DW_TAG_variable
:
9193 return "DW_TAG_variable";
9194 case DW_TAG_volatile_type
:
9195 return "DW_TAG_volatile_type";
9196 case DW_TAG_dwarf_procedure
:
9197 return "DW_TAG_dwarf_procedure";
9198 case DW_TAG_restrict_type
:
9199 return "DW_TAG_restrict_type";
9200 case DW_TAG_interface_type
:
9201 return "DW_TAG_interface_type";
9202 case DW_TAG_namespace
:
9203 return "DW_TAG_namespace";
9204 case DW_TAG_imported_module
:
9205 return "DW_TAG_imported_module";
9206 case DW_TAG_unspecified_type
:
9207 return "DW_TAG_unspecified_type";
9208 case DW_TAG_partial_unit
:
9209 return "DW_TAG_partial_unit";
9210 case DW_TAG_imported_unit
:
9211 return "DW_TAG_imported_unit";
9212 case DW_TAG_condition
:
9213 return "DW_TAG_condition";
9214 case DW_TAG_shared_type
:
9215 return "DW_TAG_shared_type";
9216 case DW_TAG_type_unit
:
9217 return "DW_TAG_type_unit";
9218 case DW_TAG_MIPS_loop
:
9219 return "DW_TAG_MIPS_loop";
9220 case DW_TAG_HP_array_descriptor
:
9221 return "DW_TAG_HP_array_descriptor";
9222 case DW_TAG_format_label
:
9223 return "DW_TAG_format_label";
9224 case DW_TAG_function_template
:
9225 return "DW_TAG_function_template";
9226 case DW_TAG_class_template
:
9227 return "DW_TAG_class_template";
9228 case DW_TAG_GNU_BINCL
:
9229 return "DW_TAG_GNU_BINCL";
9230 case DW_TAG_GNU_EINCL
:
9231 return "DW_TAG_GNU_EINCL";
9232 case DW_TAG_upc_shared_type
:
9233 return "DW_TAG_upc_shared_type";
9234 case DW_TAG_upc_strict_type
:
9235 return "DW_TAG_upc_strict_type";
9236 case DW_TAG_upc_relaxed_type
:
9237 return "DW_TAG_upc_relaxed_type";
9238 case DW_TAG_PGI_kanji_type
:
9239 return "DW_TAG_PGI_kanji_type";
9240 case DW_TAG_PGI_interface_block
:
9241 return "DW_TAG_PGI_interface_block";
9243 return "DW_TAG_<unknown>";
9247 /* Convert a DWARF attribute code into its string name. */
9250 dwarf_attr_name (unsigned attr
)
9255 return "DW_AT_sibling";
9256 case DW_AT_location
:
9257 return "DW_AT_location";
9259 return "DW_AT_name";
9260 case DW_AT_ordering
:
9261 return "DW_AT_ordering";
9262 case DW_AT_subscr_data
:
9263 return "DW_AT_subscr_data";
9264 case DW_AT_byte_size
:
9265 return "DW_AT_byte_size";
9266 case DW_AT_bit_offset
:
9267 return "DW_AT_bit_offset";
9268 case DW_AT_bit_size
:
9269 return "DW_AT_bit_size";
9270 case DW_AT_element_list
:
9271 return "DW_AT_element_list";
9272 case DW_AT_stmt_list
:
9273 return "DW_AT_stmt_list";
9275 return "DW_AT_low_pc";
9277 return "DW_AT_high_pc";
9278 case DW_AT_language
:
9279 return "DW_AT_language";
9281 return "DW_AT_member";
9283 return "DW_AT_discr";
9284 case DW_AT_discr_value
:
9285 return "DW_AT_discr_value";
9286 case DW_AT_visibility
:
9287 return "DW_AT_visibility";
9289 return "DW_AT_import";
9290 case DW_AT_string_length
:
9291 return "DW_AT_string_length";
9292 case DW_AT_common_reference
:
9293 return "DW_AT_common_reference";
9294 case DW_AT_comp_dir
:
9295 return "DW_AT_comp_dir";
9296 case DW_AT_const_value
:
9297 return "DW_AT_const_value";
9298 case DW_AT_containing_type
:
9299 return "DW_AT_containing_type";
9300 case DW_AT_default_value
:
9301 return "DW_AT_default_value";
9303 return "DW_AT_inline";
9304 case DW_AT_is_optional
:
9305 return "DW_AT_is_optional";
9306 case DW_AT_lower_bound
:
9307 return "DW_AT_lower_bound";
9308 case DW_AT_producer
:
9309 return "DW_AT_producer";
9310 case DW_AT_prototyped
:
9311 return "DW_AT_prototyped";
9312 case DW_AT_return_addr
:
9313 return "DW_AT_return_addr";
9314 case DW_AT_start_scope
:
9315 return "DW_AT_start_scope";
9316 case DW_AT_bit_stride
:
9317 return "DW_AT_bit_stride";
9318 case DW_AT_upper_bound
:
9319 return "DW_AT_upper_bound";
9320 case DW_AT_abstract_origin
:
9321 return "DW_AT_abstract_origin";
9322 case DW_AT_accessibility
:
9323 return "DW_AT_accessibility";
9324 case DW_AT_address_class
:
9325 return "DW_AT_address_class";
9326 case DW_AT_artificial
:
9327 return "DW_AT_artificial";
9328 case DW_AT_base_types
:
9329 return "DW_AT_base_types";
9330 case DW_AT_calling_convention
:
9331 return "DW_AT_calling_convention";
9333 return "DW_AT_count";
9334 case DW_AT_data_member_location
:
9335 return "DW_AT_data_member_location";
9336 case DW_AT_decl_column
:
9337 return "DW_AT_decl_column";
9338 case DW_AT_decl_file
:
9339 return "DW_AT_decl_file";
9340 case DW_AT_decl_line
:
9341 return "DW_AT_decl_line";
9342 case DW_AT_declaration
:
9343 return "DW_AT_declaration";
9344 case DW_AT_discr_list
:
9345 return "DW_AT_discr_list";
9346 case DW_AT_encoding
:
9347 return "DW_AT_encoding";
9348 case DW_AT_external
:
9349 return "DW_AT_external";
9350 case DW_AT_frame_base
:
9351 return "DW_AT_frame_base";
9353 return "DW_AT_friend";
9354 case DW_AT_identifier_case
:
9355 return "DW_AT_identifier_case";
9356 case DW_AT_macro_info
:
9357 return "DW_AT_macro_info";
9358 case DW_AT_namelist_items
:
9359 return "DW_AT_namelist_items";
9360 case DW_AT_priority
:
9361 return "DW_AT_priority";
9363 return "DW_AT_segment";
9364 case DW_AT_specification
:
9365 return "DW_AT_specification";
9366 case DW_AT_static_link
:
9367 return "DW_AT_static_link";
9369 return "DW_AT_type";
9370 case DW_AT_use_location
:
9371 return "DW_AT_use_location";
9372 case DW_AT_variable_parameter
:
9373 return "DW_AT_variable_parameter";
9374 case DW_AT_virtuality
:
9375 return "DW_AT_virtuality";
9376 case DW_AT_vtable_elem_location
:
9377 return "DW_AT_vtable_elem_location";
9378 /* DWARF 3 values. */
9379 case DW_AT_allocated
:
9380 return "DW_AT_allocated";
9381 case DW_AT_associated
:
9382 return "DW_AT_associated";
9383 case DW_AT_data_location
:
9384 return "DW_AT_data_location";
9385 case DW_AT_byte_stride
:
9386 return "DW_AT_byte_stride";
9387 case DW_AT_entry_pc
:
9388 return "DW_AT_entry_pc";
9389 case DW_AT_use_UTF8
:
9390 return "DW_AT_use_UTF8";
9391 case DW_AT_extension
:
9392 return "DW_AT_extension";
9394 return "DW_AT_ranges";
9395 case DW_AT_trampoline
:
9396 return "DW_AT_trampoline";
9397 case DW_AT_call_column
:
9398 return "DW_AT_call_column";
9399 case DW_AT_call_file
:
9400 return "DW_AT_call_file";
9401 case DW_AT_call_line
:
9402 return "DW_AT_call_line";
9403 case DW_AT_description
:
9404 return "DW_AT_description";
9405 case DW_AT_binary_scale
:
9406 return "DW_AT_binary_scale";
9407 case DW_AT_decimal_scale
:
9408 return "DW_AT_decimal_scale";
9410 return "DW_AT_small";
9411 case DW_AT_decimal_sign
:
9412 return "DW_AT_decimal_sign";
9413 case DW_AT_digit_count
:
9414 return "DW_AT_digit_count";
9415 case DW_AT_picture_string
:
9416 return "DW_AT_picture_string";
9418 return "DW_AT_mutable";
9419 case DW_AT_threads_scaled
:
9420 return "DW_AT_threads_scaled";
9421 case DW_AT_explicit
:
9422 return "DW_AT_explicit";
9423 case DW_AT_object_pointer
:
9424 return "DW_AT_object_pointer";
9425 case DW_AT_endianity
:
9426 return "DW_AT_endianity";
9427 case DW_AT_elemental
:
9428 return "DW_AT_elemental";
9430 return "DW_AT_pure";
9431 case DW_AT_recursive
:
9432 return "DW_AT_recursive";
9433 /* DWARF 4 values. */
9434 case DW_AT_signature
:
9435 return "DW_AT_signature";
9436 /* SGI/MIPS extensions. */
9437 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9438 case DW_AT_MIPS_fde
:
9439 return "DW_AT_MIPS_fde";
9441 case DW_AT_MIPS_loop_begin
:
9442 return "DW_AT_MIPS_loop_begin";
9443 case DW_AT_MIPS_tail_loop_begin
:
9444 return "DW_AT_MIPS_tail_loop_begin";
9445 case DW_AT_MIPS_epilog_begin
:
9446 return "DW_AT_MIPS_epilog_begin";
9447 case DW_AT_MIPS_loop_unroll_factor
:
9448 return "DW_AT_MIPS_loop_unroll_factor";
9449 case DW_AT_MIPS_software_pipeline_depth
:
9450 return "DW_AT_MIPS_software_pipeline_depth";
9451 case DW_AT_MIPS_linkage_name
:
9452 return "DW_AT_MIPS_linkage_name";
9453 case DW_AT_MIPS_stride
:
9454 return "DW_AT_MIPS_stride";
9455 case DW_AT_MIPS_abstract_name
:
9456 return "DW_AT_MIPS_abstract_name";
9457 case DW_AT_MIPS_clone_origin
:
9458 return "DW_AT_MIPS_clone_origin";
9459 case DW_AT_MIPS_has_inlines
:
9460 return "DW_AT_MIPS_has_inlines";
9461 /* HP extensions. */
9462 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9463 case DW_AT_HP_block_index
:
9464 return "DW_AT_HP_block_index";
9466 case DW_AT_HP_unmodifiable
:
9467 return "DW_AT_HP_unmodifiable";
9468 case DW_AT_HP_actuals_stmt_list
:
9469 return "DW_AT_HP_actuals_stmt_list";
9470 case DW_AT_HP_proc_per_section
:
9471 return "DW_AT_HP_proc_per_section";
9472 case DW_AT_HP_raw_data_ptr
:
9473 return "DW_AT_HP_raw_data_ptr";
9474 case DW_AT_HP_pass_by_reference
:
9475 return "DW_AT_HP_pass_by_reference";
9476 case DW_AT_HP_opt_level
:
9477 return "DW_AT_HP_opt_level";
9478 case DW_AT_HP_prof_version_id
:
9479 return "DW_AT_HP_prof_version_id";
9480 case DW_AT_HP_opt_flags
:
9481 return "DW_AT_HP_opt_flags";
9482 case DW_AT_HP_cold_region_low_pc
:
9483 return "DW_AT_HP_cold_region_low_pc";
9484 case DW_AT_HP_cold_region_high_pc
:
9485 return "DW_AT_HP_cold_region_high_pc";
9486 case DW_AT_HP_all_variables_modifiable
:
9487 return "DW_AT_HP_all_variables_modifiable";
9488 case DW_AT_HP_linkage_name
:
9489 return "DW_AT_HP_linkage_name";
9490 case DW_AT_HP_prof_flags
:
9491 return "DW_AT_HP_prof_flags";
9492 /* GNU extensions. */
9493 case DW_AT_sf_names
:
9494 return "DW_AT_sf_names";
9495 case DW_AT_src_info
:
9496 return "DW_AT_src_info";
9497 case DW_AT_mac_info
:
9498 return "DW_AT_mac_info";
9499 case DW_AT_src_coords
:
9500 return "DW_AT_src_coords";
9501 case DW_AT_body_begin
:
9502 return "DW_AT_body_begin";
9503 case DW_AT_body_end
:
9504 return "DW_AT_body_end";
9505 case DW_AT_GNU_vector
:
9506 return "DW_AT_GNU_vector";
9507 /* VMS extensions. */
9508 case DW_AT_VMS_rtnbeg_pd_address
:
9509 return "DW_AT_VMS_rtnbeg_pd_address";
9510 /* UPC extension. */
9511 case DW_AT_upc_threads_scaled
:
9512 return "DW_AT_upc_threads_scaled";
9513 /* PGI (STMicroelectronics) extensions. */
9514 case DW_AT_PGI_lbase
:
9515 return "DW_AT_PGI_lbase";
9516 case DW_AT_PGI_soffset
:
9517 return "DW_AT_PGI_soffset";
9518 case DW_AT_PGI_lstride
:
9519 return "DW_AT_PGI_lstride";
9521 return "DW_AT_<unknown>";
9525 /* Convert a DWARF value form code into its string name. */
9528 dwarf_form_name (unsigned form
)
9533 return "DW_FORM_addr";
9534 case DW_FORM_block2
:
9535 return "DW_FORM_block2";
9536 case DW_FORM_block4
:
9537 return "DW_FORM_block4";
9539 return "DW_FORM_data2";
9541 return "DW_FORM_data4";
9543 return "DW_FORM_data8";
9544 case DW_FORM_string
:
9545 return "DW_FORM_string";
9547 return "DW_FORM_block";
9548 case DW_FORM_block1
:
9549 return "DW_FORM_block1";
9551 return "DW_FORM_data1";
9553 return "DW_FORM_flag";
9555 return "DW_FORM_sdata";
9557 return "DW_FORM_strp";
9559 return "DW_FORM_udata";
9560 case DW_FORM_ref_addr
:
9561 return "DW_FORM_ref_addr";
9563 return "DW_FORM_ref1";
9565 return "DW_FORM_ref2";
9567 return "DW_FORM_ref4";
9569 return "DW_FORM_ref8";
9570 case DW_FORM_ref_udata
:
9571 return "DW_FORM_ref_udata";
9572 case DW_FORM_indirect
:
9573 return "DW_FORM_indirect";
9574 case DW_FORM_sec_offset
:
9575 return "DW_FORM_sec_offset";
9576 case DW_FORM_exprloc
:
9577 return "DW_FORM_exprloc";
9578 case DW_FORM_flag_present
:
9579 return "DW_FORM_flag_present";
9581 return "DW_FORM_sig8";
9583 return "DW_FORM_<unknown>";
9587 /* Convert a DWARF stack opcode into its string name. */
9590 dwarf_stack_op_name (unsigned op
)
9595 return "DW_OP_addr";
9597 return "DW_OP_deref";
9599 return "DW_OP_const1u";
9601 return "DW_OP_const1s";
9603 return "DW_OP_const2u";
9605 return "DW_OP_const2s";
9607 return "DW_OP_const4u";
9609 return "DW_OP_const4s";
9611 return "DW_OP_const8u";
9613 return "DW_OP_const8s";
9615 return "DW_OP_constu";
9617 return "DW_OP_consts";
9621 return "DW_OP_drop";
9623 return "DW_OP_over";
9625 return "DW_OP_pick";
9627 return "DW_OP_swap";
9631 return "DW_OP_xderef";
9639 return "DW_OP_minus";
9651 return "DW_OP_plus";
9652 case DW_OP_plus_uconst
:
9653 return "DW_OP_plus_uconst";
9659 return "DW_OP_shra";
9677 return "DW_OP_skip";
9679 return "DW_OP_lit0";
9681 return "DW_OP_lit1";
9683 return "DW_OP_lit2";
9685 return "DW_OP_lit3";
9687 return "DW_OP_lit4";
9689 return "DW_OP_lit5";
9691 return "DW_OP_lit6";
9693 return "DW_OP_lit7";
9695 return "DW_OP_lit8";
9697 return "DW_OP_lit9";
9699 return "DW_OP_lit10";
9701 return "DW_OP_lit11";
9703 return "DW_OP_lit12";
9705 return "DW_OP_lit13";
9707 return "DW_OP_lit14";
9709 return "DW_OP_lit15";
9711 return "DW_OP_lit16";
9713 return "DW_OP_lit17";
9715 return "DW_OP_lit18";
9717 return "DW_OP_lit19";
9719 return "DW_OP_lit20";
9721 return "DW_OP_lit21";
9723 return "DW_OP_lit22";
9725 return "DW_OP_lit23";
9727 return "DW_OP_lit24";
9729 return "DW_OP_lit25";
9731 return "DW_OP_lit26";
9733 return "DW_OP_lit27";
9735 return "DW_OP_lit28";
9737 return "DW_OP_lit29";
9739 return "DW_OP_lit30";
9741 return "DW_OP_lit31";
9743 return "DW_OP_reg0";
9745 return "DW_OP_reg1";
9747 return "DW_OP_reg2";
9749 return "DW_OP_reg3";
9751 return "DW_OP_reg4";
9753 return "DW_OP_reg5";
9755 return "DW_OP_reg6";
9757 return "DW_OP_reg7";
9759 return "DW_OP_reg8";
9761 return "DW_OP_reg9";
9763 return "DW_OP_reg10";
9765 return "DW_OP_reg11";
9767 return "DW_OP_reg12";
9769 return "DW_OP_reg13";
9771 return "DW_OP_reg14";
9773 return "DW_OP_reg15";
9775 return "DW_OP_reg16";
9777 return "DW_OP_reg17";
9779 return "DW_OP_reg18";
9781 return "DW_OP_reg19";
9783 return "DW_OP_reg20";
9785 return "DW_OP_reg21";
9787 return "DW_OP_reg22";
9789 return "DW_OP_reg23";
9791 return "DW_OP_reg24";
9793 return "DW_OP_reg25";
9795 return "DW_OP_reg26";
9797 return "DW_OP_reg27";
9799 return "DW_OP_reg28";
9801 return "DW_OP_reg29";
9803 return "DW_OP_reg30";
9805 return "DW_OP_reg31";
9807 return "DW_OP_breg0";
9809 return "DW_OP_breg1";
9811 return "DW_OP_breg2";
9813 return "DW_OP_breg3";
9815 return "DW_OP_breg4";
9817 return "DW_OP_breg5";
9819 return "DW_OP_breg6";
9821 return "DW_OP_breg7";
9823 return "DW_OP_breg8";
9825 return "DW_OP_breg9";
9827 return "DW_OP_breg10";
9829 return "DW_OP_breg11";
9831 return "DW_OP_breg12";
9833 return "DW_OP_breg13";
9835 return "DW_OP_breg14";
9837 return "DW_OP_breg15";
9839 return "DW_OP_breg16";
9841 return "DW_OP_breg17";
9843 return "DW_OP_breg18";
9845 return "DW_OP_breg19";
9847 return "DW_OP_breg20";
9849 return "DW_OP_breg21";
9851 return "DW_OP_breg22";
9853 return "DW_OP_breg23";
9855 return "DW_OP_breg24";
9857 return "DW_OP_breg25";
9859 return "DW_OP_breg26";
9861 return "DW_OP_breg27";
9863 return "DW_OP_breg28";
9865 return "DW_OP_breg29";
9867 return "DW_OP_breg30";
9869 return "DW_OP_breg31";
9871 return "DW_OP_regx";
9873 return "DW_OP_fbreg";
9875 return "DW_OP_bregx";
9877 return "DW_OP_piece";
9878 case DW_OP_deref_size
:
9879 return "DW_OP_deref_size";
9880 case DW_OP_xderef_size
:
9881 return "DW_OP_xderef_size";
9884 /* DWARF 3 extensions. */
9885 case DW_OP_push_object_address
:
9886 return "DW_OP_push_object_address";
9888 return "DW_OP_call2";
9890 return "DW_OP_call4";
9891 case DW_OP_call_ref
:
9892 return "DW_OP_call_ref";
9893 /* GNU extensions. */
9894 case DW_OP_form_tls_address
:
9895 return "DW_OP_form_tls_address";
9896 case DW_OP_call_frame_cfa
:
9897 return "DW_OP_call_frame_cfa";
9898 case DW_OP_bit_piece
:
9899 return "DW_OP_bit_piece";
9900 case DW_OP_GNU_push_tls_address
:
9901 return "DW_OP_GNU_push_tls_address";
9902 case DW_OP_GNU_uninit
:
9903 return "DW_OP_GNU_uninit";
9904 /* HP extensions. */
9905 case DW_OP_HP_is_value
:
9906 return "DW_OP_HP_is_value";
9907 case DW_OP_HP_fltconst4
:
9908 return "DW_OP_HP_fltconst4";
9909 case DW_OP_HP_fltconst8
:
9910 return "DW_OP_HP_fltconst8";
9911 case DW_OP_HP_mod_range
:
9912 return "DW_OP_HP_mod_range";
9913 case DW_OP_HP_unmod_range
:
9914 return "DW_OP_HP_unmod_range";
9916 return "DW_OP_HP_tls";
9918 return "OP_<unknown>";
9923 dwarf_bool_name (unsigned mybool
)
9931 /* Convert a DWARF type code into its string name. */
9934 dwarf_type_encoding_name (unsigned enc
)
9939 return "DW_ATE_void";
9940 case DW_ATE_address
:
9941 return "DW_ATE_address";
9942 case DW_ATE_boolean
:
9943 return "DW_ATE_boolean";
9944 case DW_ATE_complex_float
:
9945 return "DW_ATE_complex_float";
9947 return "DW_ATE_float";
9949 return "DW_ATE_signed";
9950 case DW_ATE_signed_char
:
9951 return "DW_ATE_signed_char";
9952 case DW_ATE_unsigned
:
9953 return "DW_ATE_unsigned";
9954 case DW_ATE_unsigned_char
:
9955 return "DW_ATE_unsigned_char";
9957 case DW_ATE_imaginary_float
:
9958 return "DW_ATE_imaginary_float";
9959 case DW_ATE_packed_decimal
:
9960 return "DW_ATE_packed_decimal";
9961 case DW_ATE_numeric_string
:
9962 return "DW_ATE_numeric_string";
9964 return "DW_ATE_edited";
9965 case DW_ATE_signed_fixed
:
9966 return "DW_ATE_signed_fixed";
9967 case DW_ATE_unsigned_fixed
:
9968 return "DW_ATE_unsigned_fixed";
9969 case DW_ATE_decimal_float
:
9970 return "DW_ATE_decimal_float";
9971 /* HP extensions. */
9972 case DW_ATE_HP_float80
:
9973 return "DW_ATE_HP_float80";
9974 case DW_ATE_HP_complex_float80
:
9975 return "DW_ATE_HP_complex_float80";
9976 case DW_ATE_HP_float128
:
9977 return "DW_ATE_HP_float128";
9978 case DW_ATE_HP_complex_float128
:
9979 return "DW_ATE_HP_complex_float128";
9980 case DW_ATE_HP_floathpintel
:
9981 return "DW_ATE_HP_floathpintel";
9982 case DW_ATE_HP_imaginary_float80
:
9983 return "DW_ATE_HP_imaginary_float80";
9984 case DW_ATE_HP_imaginary_float128
:
9985 return "DW_ATE_HP_imaginary_float128";
9987 return "DW_ATE_<unknown>";
9991 /* Convert a DWARF call frame info operation to its string name. */
9995 dwarf_cfi_name (unsigned cfi_opc
)
9999 case DW_CFA_advance_loc
:
10000 return "DW_CFA_advance_loc";
10001 case DW_CFA_offset
:
10002 return "DW_CFA_offset";
10003 case DW_CFA_restore
:
10004 return "DW_CFA_restore";
10006 return "DW_CFA_nop";
10007 case DW_CFA_set_loc
:
10008 return "DW_CFA_set_loc";
10009 case DW_CFA_advance_loc1
:
10010 return "DW_CFA_advance_loc1";
10011 case DW_CFA_advance_loc2
:
10012 return "DW_CFA_advance_loc2";
10013 case DW_CFA_advance_loc4
:
10014 return "DW_CFA_advance_loc4";
10015 case DW_CFA_offset_extended
:
10016 return "DW_CFA_offset_extended";
10017 case DW_CFA_restore_extended
:
10018 return "DW_CFA_restore_extended";
10019 case DW_CFA_undefined
:
10020 return "DW_CFA_undefined";
10021 case DW_CFA_same_value
:
10022 return "DW_CFA_same_value";
10023 case DW_CFA_register
:
10024 return "DW_CFA_register";
10025 case DW_CFA_remember_state
:
10026 return "DW_CFA_remember_state";
10027 case DW_CFA_restore_state
:
10028 return "DW_CFA_restore_state";
10029 case DW_CFA_def_cfa
:
10030 return "DW_CFA_def_cfa";
10031 case DW_CFA_def_cfa_register
:
10032 return "DW_CFA_def_cfa_register";
10033 case DW_CFA_def_cfa_offset
:
10034 return "DW_CFA_def_cfa_offset";
10036 case DW_CFA_def_cfa_expression
:
10037 return "DW_CFA_def_cfa_expression";
10038 case DW_CFA_expression
:
10039 return "DW_CFA_expression";
10040 case DW_CFA_offset_extended_sf
:
10041 return "DW_CFA_offset_extended_sf";
10042 case DW_CFA_def_cfa_sf
:
10043 return "DW_CFA_def_cfa_sf";
10044 case DW_CFA_def_cfa_offset_sf
:
10045 return "DW_CFA_def_cfa_offset_sf";
10046 case DW_CFA_val_offset
:
10047 return "DW_CFA_val_offset";
10048 case DW_CFA_val_offset_sf
:
10049 return "DW_CFA_val_offset_sf";
10050 case DW_CFA_val_expression
:
10051 return "DW_CFA_val_expression";
10052 /* SGI/MIPS specific. */
10053 case DW_CFA_MIPS_advance_loc8
:
10054 return "DW_CFA_MIPS_advance_loc8";
10055 /* GNU extensions. */
10056 case DW_CFA_GNU_window_save
:
10057 return "DW_CFA_GNU_window_save";
10058 case DW_CFA_GNU_args_size
:
10059 return "DW_CFA_GNU_args_size";
10060 case DW_CFA_GNU_negative_offset_extended
:
10061 return "DW_CFA_GNU_negative_offset_extended";
10063 return "DW_CFA_<unknown>";
10069 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10073 print_spaces (indent
, f
);
10074 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10075 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10077 if (die
->parent
!= NULL
)
10079 print_spaces (indent
, f
);
10080 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10081 die
->parent
->offset
);
10084 print_spaces (indent
, f
);
10085 fprintf_unfiltered (f
, " has children: %s\n",
10086 dwarf_bool_name (die
->child
!= NULL
));
10088 print_spaces (indent
, f
);
10089 fprintf_unfiltered (f
, " attributes:\n");
10091 for (i
= 0; i
< die
->num_attrs
; ++i
)
10093 print_spaces (indent
, f
);
10094 fprintf_unfiltered (f
, " %s (%s) ",
10095 dwarf_attr_name (die
->attrs
[i
].name
),
10096 dwarf_form_name (die
->attrs
[i
].form
));
10098 switch (die
->attrs
[i
].form
)
10100 case DW_FORM_ref_addr
:
10102 fprintf_unfiltered (f
, "address: ");
10103 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10105 case DW_FORM_block2
:
10106 case DW_FORM_block4
:
10107 case DW_FORM_block
:
10108 case DW_FORM_block1
:
10109 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10114 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10115 (long) (DW_ADDR (&die
->attrs
[i
])));
10117 case DW_FORM_data1
:
10118 case DW_FORM_data2
:
10119 case DW_FORM_data4
:
10120 case DW_FORM_data8
:
10121 case DW_FORM_udata
:
10122 case DW_FORM_sdata
:
10123 fprintf_unfiltered (f
, "constant: %s",
10124 pulongest (DW_UNSND (&die
->attrs
[i
])));
10127 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10128 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10129 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10131 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10133 case DW_FORM_string
:
10135 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10136 DW_STRING (&die
->attrs
[i
])
10137 ? DW_STRING (&die
->attrs
[i
]) : "",
10138 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10141 if (DW_UNSND (&die
->attrs
[i
]))
10142 fprintf_unfiltered (f
, "flag: TRUE");
10144 fprintf_unfiltered (f
, "flag: FALSE");
10146 case DW_FORM_indirect
:
10147 /* the reader will have reduced the indirect form to
10148 the "base form" so this form should not occur */
10149 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10152 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10153 die
->attrs
[i
].form
);
10156 fprintf_unfiltered (f
, "\n");
10161 dump_die_for_error (struct die_info
*die
)
10163 dump_die_shallow (gdb_stderr
, 0, die
);
10167 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10169 int indent
= level
* 4;
10171 gdb_assert (die
!= NULL
);
10173 if (level
>= max_level
)
10176 dump_die_shallow (f
, indent
, die
);
10178 if (die
->child
!= NULL
)
10180 print_spaces (indent
, f
);
10181 fprintf_unfiltered (f
, " Children:");
10182 if (level
+ 1 < max_level
)
10184 fprintf_unfiltered (f
, "\n");
10185 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10189 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10193 if (die
->sibling
!= NULL
&& level
> 0)
10195 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10199 /* This is called from the pdie macro in gdbinit.in.
10200 It's not static so gcc will keep a copy callable from gdb. */
10203 dump_die (struct die_info
*die
, int max_level
)
10205 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10209 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10213 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10219 is_ref_attr (struct attribute
*attr
)
10221 switch (attr
->form
)
10223 case DW_FORM_ref_addr
:
10228 case DW_FORM_ref_udata
:
10235 static unsigned int
10236 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10238 if (is_ref_attr (attr
))
10239 return DW_ADDR (attr
);
10241 complaint (&symfile_complaints
,
10242 _("unsupported die ref attribute form: '%s'"),
10243 dwarf_form_name (attr
->form
));
10247 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10248 * the value held by the attribute is not constant. */
10251 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10253 if (attr
->form
== DW_FORM_sdata
)
10254 return DW_SND (attr
);
10255 else if (attr
->form
== DW_FORM_udata
10256 || attr
->form
== DW_FORM_data1
10257 || attr
->form
== DW_FORM_data2
10258 || attr
->form
== DW_FORM_data4
10259 || attr
->form
== DW_FORM_data8
)
10260 return DW_UNSND (attr
);
10263 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10264 dwarf_form_name (attr
->form
));
10265 return default_value
;
10269 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10270 unit and add it to our queue.
10271 The result is non-zero if PER_CU was queued, otherwise the result is zero
10272 meaning either PER_CU is already queued or it is already loaded. */
10275 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10276 struct dwarf2_per_cu_data
*per_cu
)
10278 /* Mark the dependence relation so that we don't flush PER_CU
10280 dwarf2_add_dependence (this_cu
, per_cu
);
10282 /* If it's already on the queue, we have nothing to do. */
10283 if (per_cu
->queued
)
10286 /* If the compilation unit is already loaded, just mark it as
10288 if (per_cu
->cu
!= NULL
)
10290 per_cu
->cu
->last_used
= 0;
10294 /* Add it to the queue. */
10295 queue_comp_unit (per_cu
, this_cu
->objfile
);
10300 /* Follow reference or signature attribute ATTR of SRC_DIE.
10301 On entry *REF_CU is the CU of SRC_DIE.
10302 On exit *REF_CU is the CU of the result. */
10304 static struct die_info
*
10305 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10306 struct dwarf2_cu
**ref_cu
)
10308 struct die_info
*die
;
10310 if (is_ref_attr (attr
))
10311 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10312 else if (attr
->form
== DW_FORM_sig8
)
10313 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10316 dump_die_for_error (src_die
);
10317 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10318 (*ref_cu
)->objfile
->name
);
10324 /* Follow reference attribute ATTR of SRC_DIE.
10325 On entry *REF_CU is the CU of SRC_DIE.
10326 On exit *REF_CU is the CU of the result. */
10328 static struct die_info
*
10329 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10330 struct dwarf2_cu
**ref_cu
)
10332 struct die_info
*die
;
10333 unsigned int offset
;
10334 struct die_info temp_die
;
10335 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10337 gdb_assert (cu
->per_cu
!= NULL
);
10339 offset
= dwarf2_get_ref_die_offset (attr
);
10341 if (cu
->per_cu
->from_debug_types
)
10343 /* .debug_types CUs cannot reference anything outside their CU.
10344 If they need to, they have to reference a signatured type via
10346 if (! offset_in_cu_p (&cu
->header
, offset
))
10350 else if (! offset_in_cu_p (&cu
->header
, offset
))
10352 struct dwarf2_per_cu_data
*per_cu
;
10353 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10355 /* If necessary, add it to the queue and load its DIEs. */
10356 if (maybe_queue_comp_unit (cu
, per_cu
))
10357 load_full_comp_unit (per_cu
, cu
->objfile
);
10359 target_cu
= per_cu
->cu
;
10364 *ref_cu
= target_cu
;
10365 temp_die
.offset
= offset
;
10366 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10372 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10373 "at 0x%x [in module %s]"),
10374 offset
, src_die
->offset
, cu
->objfile
->name
);
10377 /* Follow the signature attribute ATTR in SRC_DIE.
10378 On entry *REF_CU is the CU of SRC_DIE.
10379 On exit *REF_CU is the CU of the result. */
10381 static struct die_info
*
10382 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10383 struct dwarf2_cu
**ref_cu
)
10385 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10386 struct die_info temp_die
;
10387 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10388 struct dwarf2_cu
*sig_cu
;
10389 struct die_info
*die
;
10391 /* sig_type will be NULL if the signatured type is missing from
10393 if (sig_type
== NULL
)
10394 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10395 "at 0x%x [in module %s]"),
10396 src_die
->offset
, objfile
->name
);
10398 /* If necessary, add it to the queue and load its DIEs. */
10400 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10401 read_signatured_type (objfile
, sig_type
);
10403 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10405 sig_cu
= sig_type
->per_cu
.cu
;
10406 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10407 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10414 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10415 "at 0x%x [in module %s]"),
10416 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10419 /* Given an offset of a signatured type, return its signatured_type. */
10421 static struct signatured_type
*
10422 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10424 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10425 unsigned int length
, initial_length_size
;
10426 unsigned int sig_offset
;
10427 struct signatured_type find_entry
, *type_sig
;
10429 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10430 sig_offset
= (initial_length_size
10432 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10433 + 1 /*address_size*/);
10434 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10435 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10437 /* This is only used to lookup previously recorded types.
10438 If we didn't find it, it's our bug. */
10439 gdb_assert (type_sig
!= NULL
);
10440 gdb_assert (offset
== type_sig
->offset
);
10445 /* Read in signatured type at OFFSET and build its CU and die(s). */
10448 read_signatured_type_at_offset (struct objfile
*objfile
,
10449 unsigned int offset
)
10451 struct signatured_type
*type_sig
;
10453 /* We have the section offset, but we need the signature to do the
10454 hash table lookup. */
10455 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10457 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10459 read_signatured_type (objfile
, type_sig
);
10461 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10464 /* Read in a signatured type and build its CU and DIEs. */
10467 read_signatured_type (struct objfile
*objfile
,
10468 struct signatured_type
*type_sig
)
10470 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10471 struct die_reader_specs reader_specs
;
10472 struct dwarf2_cu
*cu
;
10473 ULONGEST signature
;
10474 struct cleanup
*back_to
, *free_cu_cleanup
;
10475 struct attribute
*attr
;
10477 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10479 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10480 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10481 obstack_init (&cu
->comp_unit_obstack
);
10482 cu
->objfile
= objfile
;
10483 type_sig
->per_cu
.cu
= cu
;
10484 cu
->per_cu
= &type_sig
->per_cu
;
10486 /* If an error occurs while loading, release our storage. */
10487 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10489 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10490 types_ptr
, objfile
->obfd
);
10491 gdb_assert (signature
== type_sig
->signature
);
10494 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10498 &cu
->comp_unit_obstack
,
10499 hashtab_obstack_allocate
,
10500 dummy_obstack_deallocate
);
10502 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10503 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10505 init_cu_die_reader (&reader_specs
, cu
);
10507 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10510 /* We try not to read any attributes in this function, because not
10511 all objfiles needed for references have been loaded yet, and symbol
10512 table processing isn't initialized. But we have to set the CU language,
10513 or we won't be able to build types correctly. */
10514 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10516 set_cu_language (DW_UNSND (attr
), cu
);
10518 set_cu_language (language_minimal
, cu
);
10520 do_cleanups (back_to
);
10522 /* We've successfully allocated this compilation unit. Let our caller
10523 clean it up when finished with it. */
10524 discard_cleanups (free_cu_cleanup
);
10526 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10527 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10530 /* Decode simple location descriptions.
10531 Given a pointer to a dwarf block that defines a location, compute
10532 the location and return the value.
10534 NOTE drow/2003-11-18: This function is called in two situations
10535 now: for the address of static or global variables (partial symbols
10536 only) and for offsets into structures which are expected to be
10537 (more or less) constant. The partial symbol case should go away,
10538 and only the constant case should remain. That will let this
10539 function complain more accurately. A few special modes are allowed
10540 without complaint for global variables (for instance, global
10541 register values and thread-local values).
10543 A location description containing no operations indicates that the
10544 object is optimized out. The return value is 0 for that case.
10545 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10546 callers will only want a very basic result and this can become a
10549 Note that stack[0] is unused except as a default error return.
10550 Note that stack overflow is not yet handled. */
10553 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10555 struct objfile
*objfile
= cu
->objfile
;
10556 struct comp_unit_head
*cu_header
= &cu
->header
;
10558 int size
= blk
->size
;
10559 gdb_byte
*data
= blk
->data
;
10560 CORE_ADDR stack
[64];
10562 unsigned int bytes_read
, unsnd
;
10606 stack
[++stacki
] = op
- DW_OP_lit0
;
10641 stack
[++stacki
] = op
- DW_OP_reg0
;
10643 dwarf2_complex_location_expr_complaint ();
10647 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10649 stack
[++stacki
] = unsnd
;
10651 dwarf2_complex_location_expr_complaint ();
10655 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10660 case DW_OP_const1u
:
10661 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10665 case DW_OP_const1s
:
10666 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10670 case DW_OP_const2u
:
10671 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10675 case DW_OP_const2s
:
10676 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10680 case DW_OP_const4u
:
10681 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10685 case DW_OP_const4s
:
10686 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10691 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10697 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10702 stack
[stacki
+ 1] = stack
[stacki
];
10707 stack
[stacki
- 1] += stack
[stacki
];
10711 case DW_OP_plus_uconst
:
10712 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10717 stack
[stacki
- 1] -= stack
[stacki
];
10722 /* If we're not the last op, then we definitely can't encode
10723 this using GDB's address_class enum. This is valid for partial
10724 global symbols, although the variable's address will be bogus
10727 dwarf2_complex_location_expr_complaint ();
10730 case DW_OP_GNU_push_tls_address
:
10731 /* The top of the stack has the offset from the beginning
10732 of the thread control block at which the variable is located. */
10733 /* Nothing should follow this operator, so the top of stack would
10735 /* This is valid for partial global symbols, but the variable's
10736 address will be bogus in the psymtab. */
10738 dwarf2_complex_location_expr_complaint ();
10741 case DW_OP_GNU_uninit
:
10745 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10746 dwarf_stack_op_name (op
));
10747 return (stack
[stacki
]);
10750 return (stack
[stacki
]);
10753 /* memory allocation interface */
10755 static struct dwarf_block
*
10756 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10758 struct dwarf_block
*blk
;
10760 blk
= (struct dwarf_block
*)
10761 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10765 static struct abbrev_info
*
10766 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10768 struct abbrev_info
*abbrev
;
10770 abbrev
= (struct abbrev_info
*)
10771 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10772 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10776 static struct die_info
*
10777 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10779 struct die_info
*die
;
10780 size_t size
= sizeof (struct die_info
);
10783 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10785 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10786 memset (die
, 0, sizeof (struct die_info
));
10791 /* Macro support. */
10794 /* Return the full name of file number I in *LH's file name table.
10795 Use COMP_DIR as the name of the current directory of the
10796 compilation. The result is allocated using xmalloc; the caller is
10797 responsible for freeing it. */
10799 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10801 /* Is the file number a valid index into the line header's file name
10802 table? Remember that file numbers start with one, not zero. */
10803 if (1 <= file
&& file
<= lh
->num_file_names
)
10805 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10807 if (IS_ABSOLUTE_PATH (fe
->name
))
10808 return xstrdup (fe
->name
);
10816 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10822 dir_len
= strlen (dir
);
10823 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10824 strcpy (full_name
, dir
);
10825 full_name
[dir_len
] = '/';
10826 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10830 return xstrdup (fe
->name
);
10835 /* The compiler produced a bogus file number. We can at least
10836 record the macro definitions made in the file, even if we
10837 won't be able to find the file by name. */
10838 char fake_name
[80];
10839 sprintf (fake_name
, "<bad macro file number %d>", file
);
10841 complaint (&symfile_complaints
,
10842 _("bad file number in macro information (%d)"),
10845 return xstrdup (fake_name
);
10850 static struct macro_source_file
*
10851 macro_start_file (int file
, int line
,
10852 struct macro_source_file
*current_file
,
10853 const char *comp_dir
,
10854 struct line_header
*lh
, struct objfile
*objfile
)
10856 /* The full name of this source file. */
10857 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10859 /* We don't create a macro table for this compilation unit
10860 at all until we actually get a filename. */
10861 if (! pending_macros
)
10862 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10863 objfile
->macro_cache
);
10865 if (! current_file
)
10866 /* If we have no current file, then this must be the start_file
10867 directive for the compilation unit's main source file. */
10868 current_file
= macro_set_main (pending_macros
, full_name
);
10870 current_file
= macro_include (current_file
, line
, full_name
);
10874 return current_file
;
10878 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10879 followed by a null byte. */
10881 copy_string (const char *buf
, int len
)
10883 char *s
= xmalloc (len
+ 1);
10884 memcpy (s
, buf
, len
);
10891 static const char *
10892 consume_improper_spaces (const char *p
, const char *body
)
10896 complaint (&symfile_complaints
,
10897 _("macro definition contains spaces in formal argument list:\n`%s'"),
10909 parse_macro_definition (struct macro_source_file
*file
, int line
,
10914 /* The body string takes one of two forms. For object-like macro
10915 definitions, it should be:
10917 <macro name> " " <definition>
10919 For function-like macro definitions, it should be:
10921 <macro name> "() " <definition>
10923 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10925 Spaces may appear only where explicitly indicated, and in the
10928 The Dwarf 2 spec says that an object-like macro's name is always
10929 followed by a space, but versions of GCC around March 2002 omit
10930 the space when the macro's definition is the empty string.
10932 The Dwarf 2 spec says that there should be no spaces between the
10933 formal arguments in a function-like macro's formal argument list,
10934 but versions of GCC around March 2002 include spaces after the
10938 /* Find the extent of the macro name. The macro name is terminated
10939 by either a space or null character (for an object-like macro) or
10940 an opening paren (for a function-like macro). */
10941 for (p
= body
; *p
; p
++)
10942 if (*p
== ' ' || *p
== '(')
10945 if (*p
== ' ' || *p
== '\0')
10947 /* It's an object-like macro. */
10948 int name_len
= p
- body
;
10949 char *name
= copy_string (body
, name_len
);
10950 const char *replacement
;
10953 replacement
= body
+ name_len
+ 1;
10956 dwarf2_macro_malformed_definition_complaint (body
);
10957 replacement
= body
+ name_len
;
10960 macro_define_object (file
, line
, name
, replacement
);
10964 else if (*p
== '(')
10966 /* It's a function-like macro. */
10967 char *name
= copy_string (body
, p
- body
);
10970 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10974 p
= consume_improper_spaces (p
, body
);
10976 /* Parse the formal argument list. */
10977 while (*p
&& *p
!= ')')
10979 /* Find the extent of the current argument name. */
10980 const char *arg_start
= p
;
10982 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10985 if (! *p
|| p
== arg_start
)
10986 dwarf2_macro_malformed_definition_complaint (body
);
10989 /* Make sure argv has room for the new argument. */
10990 if (argc
>= argv_size
)
10993 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10996 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10999 p
= consume_improper_spaces (p
, body
);
11001 /* Consume the comma, if present. */
11006 p
= consume_improper_spaces (p
, body
);
11015 /* Perfectly formed definition, no complaints. */
11016 macro_define_function (file
, line
, name
,
11017 argc
, (const char **) argv
,
11019 else if (*p
== '\0')
11021 /* Complain, but do define it. */
11022 dwarf2_macro_malformed_definition_complaint (body
);
11023 macro_define_function (file
, line
, name
,
11024 argc
, (const char **) argv
,
11028 /* Just complain. */
11029 dwarf2_macro_malformed_definition_complaint (body
);
11032 /* Just complain. */
11033 dwarf2_macro_malformed_definition_complaint (body
);
11039 for (i
= 0; i
< argc
; i
++)
11045 dwarf2_macro_malformed_definition_complaint (body
);
11050 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11051 char *comp_dir
, bfd
*abfd
,
11052 struct dwarf2_cu
*cu
)
11054 gdb_byte
*mac_ptr
, *mac_end
;
11055 struct macro_source_file
*current_file
= 0;
11056 enum dwarf_macinfo_record_type macinfo_type
;
11057 int at_commandline
;
11059 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11061 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11065 /* First pass: Find the name of the base filename.
11066 This filename is needed in order to process all macros whose definition
11067 (or undefinition) comes from the command line. These macros are defined
11068 before the first DW_MACINFO_start_file entry, and yet still need to be
11069 associated to the base file.
11071 To determine the base file name, we scan the macro definitions until we
11072 reach the first DW_MACINFO_start_file entry. We then initialize
11073 CURRENT_FILE accordingly so that any macro definition found before the
11074 first DW_MACINFO_start_file can still be associated to the base file. */
11076 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11077 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11078 + dwarf2_per_objfile
->macinfo
.size
;
11082 /* Do we at least have room for a macinfo type byte? */
11083 if (mac_ptr
>= mac_end
)
11085 /* Complaint is printed during the second pass as GDB will probably
11086 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11090 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11093 switch (macinfo_type
)
11095 /* A zero macinfo type indicates the end of the macro
11100 case DW_MACINFO_define
:
11101 case DW_MACINFO_undef
:
11102 /* Only skip the data by MAC_PTR. */
11104 unsigned int bytes_read
;
11106 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11107 mac_ptr
+= bytes_read
;
11108 read_string (abfd
, mac_ptr
, &bytes_read
);
11109 mac_ptr
+= bytes_read
;
11113 case DW_MACINFO_start_file
:
11115 unsigned int bytes_read
;
11118 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11119 mac_ptr
+= bytes_read
;
11120 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11121 mac_ptr
+= bytes_read
;
11123 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11128 case DW_MACINFO_end_file
:
11129 /* No data to skip by MAC_PTR. */
11132 case DW_MACINFO_vendor_ext
:
11133 /* Only skip the data by MAC_PTR. */
11135 unsigned int bytes_read
;
11137 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11138 mac_ptr
+= bytes_read
;
11139 read_string (abfd
, mac_ptr
, &bytes_read
);
11140 mac_ptr
+= bytes_read
;
11147 } while (macinfo_type
!= 0 && current_file
== NULL
);
11149 /* Second pass: Process all entries.
11151 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11152 command-line macro definitions/undefinitions. This flag is unset when we
11153 reach the first DW_MACINFO_start_file entry. */
11155 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11157 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11158 GDB is still reading the definitions from command line. First
11159 DW_MACINFO_start_file will need to be ignored as it was already executed
11160 to create CURRENT_FILE for the main source holding also the command line
11161 definitions. On first met DW_MACINFO_start_file this flag is reset to
11162 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11164 at_commandline
= 1;
11168 /* Do we at least have room for a macinfo type byte? */
11169 if (mac_ptr
>= mac_end
)
11171 dwarf2_macros_too_long_complaint ();
11175 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11178 switch (macinfo_type
)
11180 /* A zero macinfo type indicates the end of the macro
11185 case DW_MACINFO_define
:
11186 case DW_MACINFO_undef
:
11188 unsigned int bytes_read
;
11192 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11193 mac_ptr
+= bytes_read
;
11194 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11195 mac_ptr
+= bytes_read
;
11197 if (! current_file
)
11199 /* DWARF violation as no main source is present. */
11200 complaint (&symfile_complaints
,
11201 _("debug info with no main source gives macro %s "
11203 macinfo_type
== DW_MACINFO_define
?
11205 macinfo_type
== DW_MACINFO_undef
?
11206 _("undefinition") :
11207 _("something-or-other"), line
, body
);
11210 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11211 complaint (&symfile_complaints
,
11212 _("debug info gives %s macro %s with %s line %d: %s"),
11213 at_commandline
? _("command-line") : _("in-file"),
11214 macinfo_type
== DW_MACINFO_define
?
11216 macinfo_type
== DW_MACINFO_undef
?
11217 _("undefinition") :
11218 _("something-or-other"),
11219 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11221 if (macinfo_type
== DW_MACINFO_define
)
11222 parse_macro_definition (current_file
, line
, body
);
11223 else if (macinfo_type
== DW_MACINFO_undef
)
11224 macro_undef (current_file
, line
, body
);
11228 case DW_MACINFO_start_file
:
11230 unsigned int bytes_read
;
11233 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11234 mac_ptr
+= bytes_read
;
11235 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11236 mac_ptr
+= bytes_read
;
11238 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11239 complaint (&symfile_complaints
,
11240 _("debug info gives source %d included "
11241 "from %s at %s line %d"),
11242 file
, at_commandline
? _("command-line") : _("file"),
11243 line
== 0 ? _("zero") : _("non-zero"), line
);
11245 if (at_commandline
)
11247 /* This DW_MACINFO_start_file was executed in the pass one. */
11248 at_commandline
= 0;
11251 current_file
= macro_start_file (file
, line
,
11252 current_file
, comp_dir
,
11257 case DW_MACINFO_end_file
:
11258 if (! current_file
)
11259 complaint (&symfile_complaints
,
11260 _("macro debug info has an unmatched `close_file' directive"));
11263 current_file
= current_file
->included_by
;
11264 if (! current_file
)
11266 enum dwarf_macinfo_record_type next_type
;
11268 /* GCC circa March 2002 doesn't produce the zero
11269 type byte marking the end of the compilation
11270 unit. Complain if it's not there, but exit no
11273 /* Do we at least have room for a macinfo type byte? */
11274 if (mac_ptr
>= mac_end
)
11276 dwarf2_macros_too_long_complaint ();
11280 /* We don't increment mac_ptr here, so this is just
11282 next_type
= read_1_byte (abfd
, mac_ptr
);
11283 if (next_type
!= 0)
11284 complaint (&symfile_complaints
,
11285 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11292 case DW_MACINFO_vendor_ext
:
11294 unsigned int bytes_read
;
11298 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11299 mac_ptr
+= bytes_read
;
11300 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11301 mac_ptr
+= bytes_read
;
11303 /* We don't recognize any vendor extensions. */
11307 } while (macinfo_type
!= 0);
11310 /* Check if the attribute's form is a DW_FORM_block*
11311 if so return true else false. */
11313 attr_form_is_block (struct attribute
*attr
)
11315 return (attr
== NULL
? 0 :
11316 attr
->form
== DW_FORM_block1
11317 || attr
->form
== DW_FORM_block2
11318 || attr
->form
== DW_FORM_block4
11319 || attr
->form
== DW_FORM_block
);
11322 /* Return non-zero if ATTR's value is a section offset --- classes
11323 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11324 You may use DW_UNSND (attr) to retrieve such offsets.
11326 Section 7.5.4, "Attribute Encodings", explains that no attribute
11327 may have a value that belongs to more than one of these classes; it
11328 would be ambiguous if we did, because we use the same forms for all
11331 attr_form_is_section_offset (struct attribute
*attr
)
11333 return (attr
->form
== DW_FORM_data4
11334 || attr
->form
== DW_FORM_data8
);
11338 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11339 zero otherwise. When this function returns true, you can apply
11340 dwarf2_get_attr_constant_value to it.
11342 However, note that for some attributes you must check
11343 attr_form_is_section_offset before using this test. DW_FORM_data4
11344 and DW_FORM_data8 are members of both the constant class, and of
11345 the classes that contain offsets into other debug sections
11346 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11347 that, if an attribute's can be either a constant or one of the
11348 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11349 taken as section offsets, not constants. */
11351 attr_form_is_constant (struct attribute
*attr
)
11353 switch (attr
->form
)
11355 case DW_FORM_sdata
:
11356 case DW_FORM_udata
:
11357 case DW_FORM_data1
:
11358 case DW_FORM_data2
:
11359 case DW_FORM_data4
:
11360 case DW_FORM_data8
:
11368 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11369 struct dwarf2_cu
*cu
)
11371 if (attr_form_is_section_offset (attr
)
11372 /* ".debug_loc" may not exist at all, or the offset may be outside
11373 the section. If so, fall through to the complaint in the
11375 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11377 struct dwarf2_loclist_baton
*baton
;
11379 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11380 sizeof (struct dwarf2_loclist_baton
));
11381 baton
->per_cu
= cu
->per_cu
;
11382 gdb_assert (baton
->per_cu
);
11384 /* We don't know how long the location list is, but make sure we
11385 don't run off the edge of the section. */
11386 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11387 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11388 baton
->base_address
= cu
->base_address
;
11389 if (cu
->base_known
== 0)
11390 complaint (&symfile_complaints
,
11391 _("Location list used without specifying the CU base address."));
11393 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11394 SYMBOL_LOCATION_BATON (sym
) = baton
;
11398 struct dwarf2_locexpr_baton
*baton
;
11400 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11401 sizeof (struct dwarf2_locexpr_baton
));
11402 baton
->per_cu
= cu
->per_cu
;
11403 gdb_assert (baton
->per_cu
);
11405 if (attr_form_is_block (attr
))
11407 /* Note that we're just copying the block's data pointer
11408 here, not the actual data. We're still pointing into the
11409 info_buffer for SYM's objfile; right now we never release
11410 that buffer, but when we do clean up properly this may
11412 baton
->size
= DW_BLOCK (attr
)->size
;
11413 baton
->data
= DW_BLOCK (attr
)->data
;
11417 dwarf2_invalid_attrib_class_complaint ("location description",
11418 SYMBOL_NATURAL_NAME (sym
));
11420 baton
->data
= NULL
;
11423 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11424 SYMBOL_LOCATION_BATON (sym
) = baton
;
11428 /* Return the OBJFILE associated with the compilation unit CU. */
11431 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11433 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11435 /* Return the master objfile, so that we can report and look up the
11436 correct file containing this variable. */
11437 if (objfile
->separate_debug_objfile_backlink
)
11438 objfile
= objfile
->separate_debug_objfile_backlink
;
11443 /* Return the address size given in the compilation unit header for CU. */
11446 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11449 return per_cu
->cu
->header
.addr_size
;
11452 /* If the CU is not currently read in, we re-read its header. */
11453 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11454 struct dwarf2_per_objfile
*per_objfile
11455 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11456 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11458 struct comp_unit_head cu_header
;
11459 memset (&cu_header
, 0, sizeof cu_header
);
11460 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11461 return cu_header
.addr_size
;
11465 /* Locate the .debug_info compilation unit from CU's objfile which contains
11466 the DIE at OFFSET. Raises an error on failure. */
11468 static struct dwarf2_per_cu_data
*
11469 dwarf2_find_containing_comp_unit (unsigned int offset
,
11470 struct objfile
*objfile
)
11472 struct dwarf2_per_cu_data
*this_cu
;
11476 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11479 int mid
= low
+ (high
- low
) / 2;
11480 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11485 gdb_assert (low
== high
);
11486 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11489 error (_("Dwarf Error: could not find partial DIE containing "
11490 "offset 0x%lx [in module %s]"),
11491 (long) offset
, bfd_get_filename (objfile
->obfd
));
11493 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11494 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11498 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11499 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11500 && offset
>= this_cu
->offset
+ this_cu
->length
)
11501 error (_("invalid dwarf2 offset %u"), offset
);
11502 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11507 /* Locate the compilation unit from OBJFILE which is located at exactly
11508 OFFSET. Raises an error on failure. */
11510 static struct dwarf2_per_cu_data
*
11511 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11513 struct dwarf2_per_cu_data
*this_cu
;
11514 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11515 if (this_cu
->offset
!= offset
)
11516 error (_("no compilation unit with offset %u."), offset
);
11520 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11522 static struct dwarf2_cu
*
11523 alloc_one_comp_unit (struct objfile
*objfile
)
11525 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11526 cu
->objfile
= objfile
;
11527 obstack_init (&cu
->comp_unit_obstack
);
11531 /* Release one cached compilation unit, CU. We unlink it from the tree
11532 of compilation units, but we don't remove it from the read_in_chain;
11533 the caller is responsible for that.
11534 NOTE: DATA is a void * because this function is also used as a
11535 cleanup routine. */
11538 free_one_comp_unit (void *data
)
11540 struct dwarf2_cu
*cu
= data
;
11542 if (cu
->per_cu
!= NULL
)
11543 cu
->per_cu
->cu
= NULL
;
11546 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11551 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11552 when we're finished with it. We can't free the pointer itself, but be
11553 sure to unlink it from the cache. Also release any associated storage
11554 and perform cache maintenance.
11556 Only used during partial symbol parsing. */
11559 free_stack_comp_unit (void *data
)
11561 struct dwarf2_cu
*cu
= data
;
11563 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11564 cu
->partial_dies
= NULL
;
11566 if (cu
->per_cu
!= NULL
)
11568 /* This compilation unit is on the stack in our caller, so we
11569 should not xfree it. Just unlink it. */
11570 cu
->per_cu
->cu
= NULL
;
11573 /* If we had a per-cu pointer, then we may have other compilation
11574 units loaded, so age them now. */
11575 age_cached_comp_units ();
11579 /* Free all cached compilation units. */
11582 free_cached_comp_units (void *data
)
11584 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11586 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11587 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11588 while (per_cu
!= NULL
)
11590 struct dwarf2_per_cu_data
*next_cu
;
11592 next_cu
= per_cu
->cu
->read_in_chain
;
11594 free_one_comp_unit (per_cu
->cu
);
11595 *last_chain
= next_cu
;
11601 /* Increase the age counter on each cached compilation unit, and free
11602 any that are too old. */
11605 age_cached_comp_units (void)
11607 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11609 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11610 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11611 while (per_cu
!= NULL
)
11613 per_cu
->cu
->last_used
++;
11614 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11615 dwarf2_mark (per_cu
->cu
);
11616 per_cu
= per_cu
->cu
->read_in_chain
;
11619 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11620 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11621 while (per_cu
!= NULL
)
11623 struct dwarf2_per_cu_data
*next_cu
;
11625 next_cu
= per_cu
->cu
->read_in_chain
;
11627 if (!per_cu
->cu
->mark
)
11629 free_one_comp_unit (per_cu
->cu
);
11630 *last_chain
= next_cu
;
11633 last_chain
= &per_cu
->cu
->read_in_chain
;
11639 /* Remove a single compilation unit from the cache. */
11642 free_one_cached_comp_unit (void *target_cu
)
11644 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11646 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11647 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11648 while (per_cu
!= NULL
)
11650 struct dwarf2_per_cu_data
*next_cu
;
11652 next_cu
= per_cu
->cu
->read_in_chain
;
11654 if (per_cu
->cu
== target_cu
)
11656 free_one_comp_unit (per_cu
->cu
);
11657 *last_chain
= next_cu
;
11661 last_chain
= &per_cu
->cu
->read_in_chain
;
11667 /* Release all extra memory associated with OBJFILE. */
11670 dwarf2_free_objfile (struct objfile
*objfile
)
11672 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11674 if (dwarf2_per_objfile
== NULL
)
11677 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11678 free_cached_comp_units (NULL
);
11680 /* Everything else should be on the objfile obstack. */
11683 /* A pair of DIE offset and GDB type pointer. We store these
11684 in a hash table separate from the DIEs, and preserve them
11685 when the DIEs are flushed out of cache. */
11687 struct dwarf2_offset_and_type
11689 unsigned int offset
;
11693 /* Hash function for a dwarf2_offset_and_type. */
11696 offset_and_type_hash (const void *item
)
11698 const struct dwarf2_offset_and_type
*ofs
= item
;
11699 return ofs
->offset
;
11702 /* Equality function for a dwarf2_offset_and_type. */
11705 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11707 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11708 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11709 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11712 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11713 table if necessary. For convenience, return TYPE. */
11715 static struct type
*
11716 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11718 struct dwarf2_offset_and_type
**slot
, ofs
;
11720 if (cu
->type_hash
== NULL
)
11722 gdb_assert (cu
->per_cu
!= NULL
);
11723 cu
->per_cu
->type_hash
11724 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11725 offset_and_type_hash
,
11726 offset_and_type_eq
,
11728 &cu
->objfile
->objfile_obstack
,
11729 hashtab_obstack_allocate
,
11730 dummy_obstack_deallocate
);
11731 cu
->type_hash
= cu
->per_cu
->type_hash
;
11734 ofs
.offset
= die
->offset
;
11736 slot
= (struct dwarf2_offset_and_type
**)
11737 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11738 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11743 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11744 not have a saved type. */
11746 static struct type
*
11747 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11749 struct dwarf2_offset_and_type
*slot
, ofs
;
11750 htab_t type_hash
= cu
->type_hash
;
11752 if (type_hash
== NULL
)
11755 ofs
.offset
= die
->offset
;
11756 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11763 /* Add a dependence relationship from CU to REF_PER_CU. */
11766 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11767 struct dwarf2_per_cu_data
*ref_per_cu
)
11771 if (cu
->dependencies
== NULL
)
11773 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11774 NULL
, &cu
->comp_unit_obstack
,
11775 hashtab_obstack_allocate
,
11776 dummy_obstack_deallocate
);
11778 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11780 *slot
= ref_per_cu
;
11783 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11784 Set the mark field in every compilation unit in the
11785 cache that we must keep because we are keeping CU. */
11788 dwarf2_mark_helper (void **slot
, void *data
)
11790 struct dwarf2_per_cu_data
*per_cu
;
11792 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11793 if (per_cu
->cu
->mark
)
11795 per_cu
->cu
->mark
= 1;
11797 if (per_cu
->cu
->dependencies
!= NULL
)
11798 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11803 /* Set the mark field in CU and in every other compilation unit in the
11804 cache that we must keep because we are keeping CU. */
11807 dwarf2_mark (struct dwarf2_cu
*cu
)
11812 if (cu
->dependencies
!= NULL
)
11813 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11817 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11821 per_cu
->cu
->mark
= 0;
11822 per_cu
= per_cu
->cu
->read_in_chain
;
11826 /* Trivial hash function for partial_die_info: the hash value of a DIE
11827 is its offset in .debug_info for this objfile. */
11830 partial_die_hash (const void *item
)
11832 const struct partial_die_info
*part_die
= item
;
11833 return part_die
->offset
;
11836 /* Trivial comparison function for partial_die_info structures: two DIEs
11837 are equal if they have the same offset. */
11840 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11842 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11843 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11844 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11847 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11848 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11851 set_dwarf2_cmd (char *args
, int from_tty
)
11853 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11857 show_dwarf2_cmd (char *args
, int from_tty
)
11859 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11862 /* If section described by INFO was mmapped, munmap it now. */
11865 munmap_section_buffer (struct dwarf2_section_info
*info
)
11867 if (info
->was_mmapped
)
11870 intptr_t begin
= (intptr_t) info
->buffer
;
11871 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11872 size_t map_length
= info
->size
+ begin
- map_begin
;
11873 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11875 /* Without HAVE_MMAP, we should never be here to begin with. */
11881 /* munmap debug sections for OBJFILE, if necessary. */
11884 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11886 struct dwarf2_per_objfile
*data
= d
;
11887 munmap_section_buffer (&data
->info
);
11888 munmap_section_buffer (&data
->abbrev
);
11889 munmap_section_buffer (&data
->line
);
11890 munmap_section_buffer (&data
->str
);
11891 munmap_section_buffer (&data
->macinfo
);
11892 munmap_section_buffer (&data
->ranges
);
11893 munmap_section_buffer (&data
->loc
);
11894 munmap_section_buffer (&data
->frame
);
11895 munmap_section_buffer (&data
->eh_frame
);
11898 void _initialize_dwarf2_read (void);
11901 _initialize_dwarf2_read (void)
11903 dwarf2_objfile_data_key
11904 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11906 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11907 Set DWARF 2 specific variables.\n\
11908 Configure DWARF 2 variables such as the cache size"),
11909 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11910 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11912 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11913 Show DWARF 2 specific variables\n\
11914 Show DWARF 2 variables such as the cache size"),
11915 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11916 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11918 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11919 &dwarf2_max_cache_age
, _("\
11920 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11921 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11922 A higher limit means that cached compilation units will be stored\n\
11923 in memory longer, and more total memory will be used. Zero disables\n\
11924 caching, which can slow down startup."),
11926 show_dwarf2_max_cache_age
,
11927 &set_dwarf2_cmdlist
,
11928 &show_dwarf2_cmdlist
);
11930 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11931 Set debugging of the dwarf2 DIE reader."), _("\
11932 Show debugging of the dwarf2 DIE reader."), _("\
11933 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11934 The value is the maximum depth to print."),
11937 &setdebuglist
, &showdebuglist
);