1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length
; /* length of the .debug_info
77 unsigned short version
; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
80 unsigned char addr_size
; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length
; /* byte length of the statement
93 unsigned short version
; /* version number -- 2 for DWARF
95 unsigned int prologue_length
; /* # bytes between prologue &
97 unsigned char minimum_instruction_length
; /* byte size of
99 unsigned char default_is_stmt
; /* initial value of is_stmt
102 unsigned char line_range
;
103 unsigned char opcode_base
; /* number assigned to first special
105 unsigned char *standard_opcode_lengths
;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug
= 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info
;
120 static const struct objfile_data
*dwarf2_objfile_data_key
;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info
;
135 struct dwarf2_section_info abbrev
;
136 struct dwarf2_section_info line
;
137 struct dwarf2_section_info loc
;
138 struct dwarf2_section_info macinfo
;
139 struct dwarf2_section_info str
;
140 struct dwarf2_section_info ranges
;
141 struct dwarf2_section_info types
;
142 struct dwarf2_section_info frame
;
143 struct dwarf2_section_info eh_frame
;
146 struct objfile
*objfile
;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data
**all_comp_units
;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data
*read_in_chain
;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types
;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero
;
168 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size
;
200 unsigned char signed_addr_p
;
201 unsigned int abbrev_offset
;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size
;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size
;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset
;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile
*objfile
;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header
;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address
;
230 /* Non-zero if base_address has been set. */
233 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
235 /* The language we are debugging. */
236 enum language language
;
237 const struct language_defn
*language_defn
;
239 const char *producer
;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending
**list_in_scope
;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info
**dwarf2_abbrevs
;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack
;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack
;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data
*per_cu
;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info
*dies
;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header
*line_header
;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark
: 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr
: 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info
: 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length
: 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued
: 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies
: 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types
: 1;
340 /* Set iff currently read in. */
341 struct dwarf2_cu
*cu
;
343 /* If full symbols for this CU have been read in, then this field
344 holds a map of DIE offsets to types. It isn't always possible
345 to reconstruct this information later, so we have to preserve
349 /* The partial symbol table associated with this compilation unit,
350 or NULL for partial units (which do not have an associated
352 struct partial_symtab
*psymtab
;
355 /* Entry in the signatured_types hash table. */
357 struct signatured_type
361 /* Offset in .debug_types of the TU (type_unit) for this type. */
364 /* Offset in .debug_types of the type defined by this TU. */
365 unsigned int type_offset
;
367 /* The CU(/TU) of this type. */
368 struct dwarf2_per_cu_data per_cu
;
371 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
372 which are used for both .debug_info and .debug_types dies.
373 All parameters here are unchanging for the life of the call.
374 This struct exists to abstract away the constant parameters of
377 struct die_reader_specs
379 /* The bfd of this objfile. */
382 /* The CU of the DIE we are parsing. */
383 struct dwarf2_cu
*cu
;
385 /* Pointer to start of section buffer.
386 This is either the start of .debug_info or .debug_types. */
387 const gdb_byte
*buffer
;
390 /* The line number information for a compilation unit (found in the
391 .debug_line section) begins with a "statement program header",
392 which contains the following information. */
395 unsigned int total_length
;
396 unsigned short version
;
397 unsigned int header_length
;
398 unsigned char minimum_instruction_length
;
399 unsigned char maximum_ops_per_instruction
;
400 unsigned char default_is_stmt
;
402 unsigned char line_range
;
403 unsigned char opcode_base
;
405 /* standard_opcode_lengths[i] is the number of operands for the
406 standard opcode whose value is i. This means that
407 standard_opcode_lengths[0] is unused, and the last meaningful
408 element is standard_opcode_lengths[opcode_base - 1]. */
409 unsigned char *standard_opcode_lengths
;
411 /* The include_directories table. NOTE! These strings are not
412 allocated with xmalloc; instead, they are pointers into
413 debug_line_buffer. If you try to free them, `free' will get
415 unsigned int num_include_dirs
, include_dirs_size
;
418 /* The file_names table. NOTE! These strings are not allocated
419 with xmalloc; instead, they are pointers into debug_line_buffer.
420 Don't try to free them directly. */
421 unsigned int num_file_names
, file_names_size
;
425 unsigned int dir_index
;
426 unsigned int mod_time
;
428 int included_p
; /* Non-zero if referenced by the Line Number Program. */
429 struct symtab
*symtab
; /* The associated symbol table, if any. */
432 /* The start and end of the statement program following this
433 header. These point into dwarf2_per_objfile->line_buffer. */
434 gdb_byte
*statement_program_start
, *statement_program_end
;
437 /* When we construct a partial symbol table entry we only
438 need this much information. */
439 struct partial_die_info
441 /* Offset of this DIE. */
444 /* DWARF-2 tag for this DIE. */
445 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
447 /* Assorted flags describing the data found in this DIE. */
448 unsigned int has_children
: 1;
449 unsigned int is_external
: 1;
450 unsigned int is_declaration
: 1;
451 unsigned int has_type
: 1;
452 unsigned int has_specification
: 1;
453 unsigned int has_pc_info
: 1;
455 /* Flag set if the SCOPE field of this structure has been
457 unsigned int scope_set
: 1;
459 /* Flag set if the DIE has a byte_size attribute. */
460 unsigned int has_byte_size
: 1;
462 /* The name of this DIE. Normally the value of DW_AT_name, but
463 sometimes a default name for unnamed DIEs. */
466 /* The scope to prepend to our children. This is generally
467 allocated on the comp_unit_obstack, so will disappear
468 when this compilation unit leaves the cache. */
471 /* The location description associated with this DIE, if any. */
472 struct dwarf_block
*locdesc
;
474 /* If HAS_PC_INFO, the PC range associated with this DIE. */
478 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
479 DW_AT_sibling, if any. */
482 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
483 DW_AT_specification (or DW_AT_abstract_origin or
485 unsigned int spec_offset
;
487 /* Pointers to this DIE's parent, first child, and next sibling,
489 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
492 /* This data structure holds the information of an abbrev. */
495 unsigned int number
; /* number identifying abbrev */
496 enum dwarf_tag tag
; /* dwarf tag */
497 unsigned short has_children
; /* boolean */
498 unsigned short num_attrs
; /* number of attributes */
499 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
500 struct abbrev_info
*next
; /* next in chain */
505 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
506 ENUM_BITFIELD(dwarf_form
) form
: 16;
509 /* Attributes have a name and a value */
512 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
513 ENUM_BITFIELD(dwarf_form
) form
: 15;
515 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
516 field should be in u.str (existing only for DW_STRING) but it is kept
517 here for better struct attribute alignment. */
518 unsigned int string_is_canonical
: 1;
523 struct dwarf_block
*blk
;
527 struct signatured_type
*signatured_type
;
532 /* This data structure holds a complete die structure. */
535 /* DWARF-2 tag for this DIE. */
536 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
538 /* Number of attributes */
539 unsigned short num_attrs
;
544 /* Offset in .debug_info or .debug_types section. */
547 /* The dies in a compilation unit form an n-ary tree. PARENT
548 points to this die's parent; CHILD points to the first child of
549 this node; and all the children of a given node are chained
550 together via their SIBLING fields, terminated by a die whose
552 struct die_info
*child
; /* Its first child, if any. */
553 struct die_info
*sibling
; /* Its next sibling, if any. */
554 struct die_info
*parent
; /* Its parent, if any. */
556 /* An array of attributes, with NUM_ATTRS elements. There may be
557 zero, but it's not common and zero-sized arrays are not
558 sufficiently portable C. */
559 struct attribute attrs
[1];
562 struct function_range
565 CORE_ADDR lowpc
, highpc
;
567 struct function_range
*next
;
570 /* Get at parts of an attribute structure */
572 #define DW_STRING(attr) ((attr)->u.str)
573 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
574 #define DW_UNSND(attr) ((attr)->u.unsnd)
575 #define DW_BLOCK(attr) ((attr)->u.blk)
576 #define DW_SND(attr) ((attr)->u.snd)
577 #define DW_ADDR(attr) ((attr)->u.addr)
578 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
580 /* Blocks are a bunch of untyped bytes. */
587 #ifndef ATTR_ALLOC_CHUNK
588 #define ATTR_ALLOC_CHUNK 4
591 /* Allocate fields for structs, unions and enums in this size. */
592 #ifndef DW_FIELD_ALLOC_CHUNK
593 #define DW_FIELD_ALLOC_CHUNK 4
596 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
597 but this would require a corresponding change in unpack_field_as_long
599 static int bits_per_byte
= 8;
601 /* The routines that read and process dies for a C struct or C++ class
602 pass lists of data member fields and lists of member function fields
603 in an instance of a field_info structure, as defined below. */
606 /* List of data member and baseclasses fields. */
609 struct nextfield
*next
;
614 *fields
, *baseclasses
;
616 /* Number of fields (including baseclasses). */
619 /* Number of baseclasses. */
622 /* Set if the accesibility of one of the fields is not public. */
623 int non_public_fields
;
625 /* Member function fields array, entries are allocated in the order they
626 are encountered in the object file. */
629 struct nextfnfield
*next
;
630 struct fn_field fnfield
;
634 /* Member function fieldlist array, contains name of possibly overloaded
635 member function, number of overloaded member functions and a pointer
636 to the head of the member function field chain. */
641 struct nextfnfield
*head
;
645 /* Number of entries in the fnfieldlists array. */
649 /* One item on the queue of compilation units to read in full symbols
651 struct dwarf2_queue_item
653 struct dwarf2_per_cu_data
*per_cu
;
654 struct dwarf2_queue_item
*next
;
657 /* The current queue. */
658 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
660 /* Loaded secondary compilation units are kept in memory until they
661 have not been referenced for the processing of this many
662 compilation units. Set this to zero to disable caching. Cache
663 sizes of up to at least twenty will improve startup time for
664 typical inter-CU-reference binaries, at an obvious memory cost. */
665 static int dwarf2_max_cache_age
= 5;
667 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
668 struct cmd_list_element
*c
, const char *value
)
670 fprintf_filtered (file
, _("\
671 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
676 /* Various complaints about symbol reading that don't abort the process */
679 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
681 complaint (&symfile_complaints
,
682 _("statement list doesn't fit in .debug_line section"));
686 dwarf2_debug_line_missing_file_complaint (void)
688 complaint (&symfile_complaints
,
689 _(".debug_line section has line data without a file"));
693 dwarf2_debug_line_missing_end_sequence_complaint (void)
695 complaint (&symfile_complaints
,
696 _(".debug_line section has line program sequence without an end"));
700 dwarf2_complex_location_expr_complaint (void)
702 complaint (&symfile_complaints
, _("location expression too complex"));
706 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
709 complaint (&symfile_complaints
,
710 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
715 dwarf2_macros_too_long_complaint (void)
717 complaint (&symfile_complaints
,
718 _("macro info runs off end of `.debug_macinfo' section"));
722 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
724 complaint (&symfile_complaints
,
725 _("macro debug info contains a malformed macro definition:\n`%s'"),
730 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
732 complaint (&symfile_complaints
,
733 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
736 /* local function prototypes */
738 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
740 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
743 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
745 struct partial_symtab
*);
747 static void dwarf2_build_psymtabs_hard (struct objfile
*);
749 static void scan_partial_symbols (struct partial_die_info
*,
750 CORE_ADDR
*, CORE_ADDR
*,
751 int, struct dwarf2_cu
*);
753 static void add_partial_symbol (struct partial_die_info
*,
756 static void add_partial_namespace (struct partial_die_info
*pdi
,
757 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
758 int need_pc
, struct dwarf2_cu
*cu
);
760 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
761 CORE_ADDR
*highpc
, int need_pc
,
762 struct dwarf2_cu
*cu
);
764 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
765 struct dwarf2_cu
*cu
);
767 static void add_partial_subprogram (struct partial_die_info
*pdi
,
768 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
769 int need_pc
, struct dwarf2_cu
*cu
);
771 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
772 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
773 bfd
*abfd
, struct dwarf2_cu
*cu
);
775 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
777 static void psymtab_to_symtab_1 (struct partial_symtab
*);
779 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
781 static void dwarf2_free_abbrev_table (void *);
783 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
786 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
789 static struct partial_die_info
*load_partial_dies (bfd
*,
790 gdb_byte
*, gdb_byte
*,
791 int, struct dwarf2_cu
*);
793 static gdb_byte
*read_partial_die (struct partial_die_info
*,
794 struct abbrev_info
*abbrev
,
796 gdb_byte
*, gdb_byte
*,
799 static struct partial_die_info
*find_partial_die (unsigned int,
802 static void fixup_partial_die (struct partial_die_info
*,
805 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
806 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
808 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
809 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
811 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
813 static int read_1_signed_byte (bfd
*, gdb_byte
*);
815 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
817 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
819 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
821 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
824 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
826 static LONGEST read_checked_initial_length_and_offset
827 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
828 unsigned int *, unsigned int *);
830 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
833 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
835 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
837 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
839 static char *read_indirect_string (bfd
*, gdb_byte
*,
840 const struct comp_unit_head
*,
843 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
845 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
847 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
849 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
851 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
854 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
858 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
859 struct dwarf2_cu
*cu
);
861 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
863 static struct die_info
*die_specification (struct die_info
*die
,
864 struct dwarf2_cu
**);
866 static void free_line_header (struct line_header
*lh
);
868 static void add_file_name (struct line_header
*, char *, unsigned int,
869 unsigned int, unsigned int);
871 static struct line_header
*(dwarf_decode_line_header
872 (unsigned int offset
,
873 bfd
*abfd
, struct dwarf2_cu
*cu
));
875 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
876 struct dwarf2_cu
*, struct partial_symtab
*);
878 static void dwarf2_start_subfile (char *, char *, char *);
880 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
883 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
886 static void dwarf2_const_value_data (struct attribute
*attr
,
890 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
892 static int need_gnat_info (struct dwarf2_cu
*);
894 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
896 static void set_descriptive_type (struct type
*, struct die_info
*,
899 static struct type
*die_containing_type (struct die_info
*,
902 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
904 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
906 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
908 static char *typename_concat (struct obstack
*,
913 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
915 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
917 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
919 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
921 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
922 struct dwarf2_cu
*, struct partial_symtab
*);
924 static int dwarf2_get_pc_bounds (struct die_info
*,
925 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
926 struct partial_symtab
*);
928 static void get_scope_pc_bounds (struct die_info
*,
929 CORE_ADDR
*, CORE_ADDR
*,
932 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
933 CORE_ADDR
, struct dwarf2_cu
*);
935 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
938 static void dwarf2_attach_fields_to_type (struct field_info
*,
939 struct type
*, struct dwarf2_cu
*);
941 static void dwarf2_add_member_fn (struct field_info
*,
942 struct die_info
*, struct type
*,
945 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
946 struct type
*, struct dwarf2_cu
*);
948 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
950 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
952 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
954 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
956 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
958 static const char *namespace_name (struct die_info
*die
,
959 int *is_anonymous
, struct dwarf2_cu
*);
961 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
963 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
965 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
968 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
970 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
972 gdb_byte
**new_info_ptr
,
973 struct die_info
*parent
);
975 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
977 gdb_byte
**new_info_ptr
,
978 struct die_info
*parent
);
980 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
982 gdb_byte
**new_info_ptr
,
983 struct die_info
*parent
);
985 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
986 struct die_info
**, gdb_byte
*,
989 static void process_die (struct die_info
*, struct dwarf2_cu
*);
991 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
994 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
996 static struct die_info
*dwarf2_extension (struct die_info
*die
,
997 struct dwarf2_cu
**);
999 static char *dwarf_tag_name (unsigned int);
1001 static char *dwarf_attr_name (unsigned int);
1003 static char *dwarf_form_name (unsigned int);
1005 static char *dwarf_stack_op_name (unsigned int);
1007 static char *dwarf_bool_name (unsigned int);
1009 static char *dwarf_type_encoding_name (unsigned int);
1012 static char *dwarf_cfi_name (unsigned int);
1015 static struct die_info
*sibling_die (struct die_info
*);
1017 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1019 static void dump_die_for_error (struct die_info
*);
1021 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1024 /*static*/ void dump_die (struct die_info
*, int max_level
);
1026 static void store_in_ref_table (struct die_info
*,
1027 struct dwarf2_cu
*);
1029 static int is_ref_attr (struct attribute
*);
1031 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1033 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1035 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1037 struct dwarf2_cu
**);
1039 static struct die_info
*follow_die_ref (struct die_info
*,
1041 struct dwarf2_cu
**);
1043 static struct die_info
*follow_die_sig (struct die_info
*,
1045 struct dwarf2_cu
**);
1047 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1048 unsigned int offset
);
1050 static void read_signatured_type (struct objfile
*,
1051 struct signatured_type
*type_sig
);
1053 /* memory allocation interface */
1055 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1057 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1059 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1061 static void initialize_cu_func_list (struct dwarf2_cu
*);
1063 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1064 struct dwarf2_cu
*);
1066 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1067 char *, bfd
*, struct dwarf2_cu
*);
1069 static int attr_form_is_block (struct attribute
*);
1071 static int attr_form_is_section_offset (struct attribute
*);
1073 static int attr_form_is_constant (struct attribute
*);
1075 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1077 struct dwarf2_cu
*cu
);
1079 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1080 struct abbrev_info
*abbrev
,
1081 struct dwarf2_cu
*cu
);
1083 static void free_stack_comp_unit (void *);
1085 static hashval_t
partial_die_hash (const void *item
);
1087 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1089 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1090 (unsigned int offset
, struct objfile
*objfile
);
1092 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1093 (unsigned int offset
, struct objfile
*objfile
);
1095 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1097 static void free_one_comp_unit (void *);
1099 static void free_cached_comp_units (void *);
1101 static void age_cached_comp_units (void);
1103 static void free_one_cached_comp_unit (void *);
1105 static struct type
*set_die_type (struct die_info
*, struct type
*,
1106 struct dwarf2_cu
*);
1108 static void create_all_comp_units (struct objfile
*);
1110 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1113 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1115 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1116 struct dwarf2_per_cu_data
*);
1118 static void dwarf2_mark (struct dwarf2_cu
*);
1120 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1122 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1124 /* Try to locate the sections we need for DWARF 2 debugging
1125 information and return true if we have enough to do something. */
1128 dwarf2_has_info (struct objfile
*objfile
)
1130 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1131 if (!dwarf2_per_objfile
)
1133 /* Initialize per-objfile state. */
1134 struct dwarf2_per_objfile
*data
1135 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1137 memset (data
, 0, sizeof (*data
));
1138 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1139 dwarf2_per_objfile
= data
;
1141 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1142 dwarf2_per_objfile
->objfile
= objfile
;
1144 return (dwarf2_per_objfile
->info
.asection
!= NULL
1145 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1148 /* When loading sections, we can either look for ".<name>", or for
1149 * ".z<name>", which indicates a compressed section. */
1152 section_is_p (const char *section_name
, const char *name
)
1154 return (section_name
[0] == '.'
1155 && (strcmp (section_name
+ 1, name
) == 0
1156 || (section_name
[1] == 'z'
1157 && strcmp (section_name
+ 2, name
) == 0)));
1160 /* This function is mapped across the sections and remembers the
1161 offset and size of each of the debugging sections we are interested
1165 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1167 if (section_is_p (sectp
->name
, INFO_SECTION
))
1169 dwarf2_per_objfile
->info
.asection
= sectp
;
1170 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1172 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1174 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1175 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1177 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1179 dwarf2_per_objfile
->line
.asection
= sectp
;
1180 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1182 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1184 dwarf2_per_objfile
->loc
.asection
= sectp
;
1185 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1187 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1189 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1190 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1192 else if (section_is_p (sectp
->name
, STR_SECTION
))
1194 dwarf2_per_objfile
->str
.asection
= sectp
;
1195 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1197 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1199 dwarf2_per_objfile
->frame
.asection
= sectp
;
1200 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1202 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1204 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1206 if (aflag
& SEC_HAS_CONTENTS
)
1208 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1209 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1212 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1214 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1215 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1217 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1219 dwarf2_per_objfile
->types
.asection
= sectp
;
1220 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1223 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1224 && bfd_section_vma (abfd
, sectp
) == 0)
1225 dwarf2_per_objfile
->has_section_at_zero
= 1;
1228 /* Decompress a section that was compressed using zlib. Store the
1229 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1232 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1233 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1235 bfd
*abfd
= objfile
->obfd
;
1237 error (_("Support for zlib-compressed DWARF data (from '%s') "
1238 "is disabled in this copy of GDB"),
1239 bfd_get_filename (abfd
));
1241 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1242 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1243 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1244 bfd_size_type uncompressed_size
;
1245 gdb_byte
*uncompressed_buffer
;
1248 int header_size
= 12;
1250 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1251 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1252 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1253 bfd_get_filename (abfd
));
1255 /* Read the zlib header. In this case, it should be "ZLIB" followed
1256 by the uncompressed section size, 8 bytes in big-endian order. */
1257 if (compressed_size
< header_size
1258 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1259 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1260 bfd_get_filename (abfd
));
1261 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1262 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1263 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1264 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1265 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1266 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1267 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1268 uncompressed_size
+= compressed_buffer
[11];
1270 /* It is possible the section consists of several compressed
1271 buffers concatenated together, so we uncompress in a loop. */
1275 strm
.avail_in
= compressed_size
- header_size
;
1276 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1277 strm
.avail_out
= uncompressed_size
;
1278 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1280 rc
= inflateInit (&strm
);
1281 while (strm
.avail_in
> 0)
1284 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1285 bfd_get_filename (abfd
), rc
);
1286 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1287 + (uncompressed_size
- strm
.avail_out
));
1288 rc
= inflate (&strm
, Z_FINISH
);
1289 if (rc
!= Z_STREAM_END
)
1290 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1291 bfd_get_filename (abfd
), rc
);
1292 rc
= inflateReset (&strm
);
1294 rc
= inflateEnd (&strm
);
1296 || strm
.avail_out
!= 0)
1297 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1298 bfd_get_filename (abfd
), rc
);
1300 do_cleanups (cleanup
);
1301 *outbuf
= uncompressed_buffer
;
1302 *outsize
= uncompressed_size
;
1306 /* Read the contents of the section SECTP from object file specified by
1307 OBJFILE, store info about the section into INFO.
1308 If the section is compressed, uncompress it before returning. */
1311 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1313 bfd
*abfd
= objfile
->obfd
;
1314 asection
*sectp
= info
->asection
;
1315 gdb_byte
*buf
, *retbuf
;
1316 unsigned char header
[4];
1320 info
->buffer
= NULL
;
1321 info
->was_mmapped
= 0;
1324 if (info
->asection
== NULL
|| info
->size
== 0)
1327 /* Check if the file has a 4-byte header indicating compression. */
1328 if (info
->size
> sizeof (header
)
1329 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1330 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1332 /* Upon decompression, update the buffer and its size. */
1333 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1335 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1343 pagesize
= getpagesize ();
1345 /* Only try to mmap sections which are large enough: we don't want to
1346 waste space due to fragmentation. Also, only try mmap for sections
1347 without relocations. */
1349 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1351 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1352 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1353 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1354 MAP_PRIVATE
, pg_offset
);
1356 if (retbuf
!= MAP_FAILED
)
1358 info
->was_mmapped
= 1;
1359 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1360 #if HAVE_POSIX_MADVISE
1361 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1368 /* If we get here, we are a normal, not-compressed section. */
1370 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1372 /* When debugging .o files, we may need to apply relocations; see
1373 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1374 We never compress sections in .o files, so we only need to
1375 try this when the section is not compressed. */
1376 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1379 info
->buffer
= retbuf
;
1383 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1384 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1385 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1386 bfd_get_filename (abfd
));
1389 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1393 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1394 asection
**sectp
, gdb_byte
**bufp
,
1395 bfd_size_type
*sizep
)
1397 struct dwarf2_per_objfile
*data
1398 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1399 struct dwarf2_section_info
*info
;
1401 /* We may see an objfile without any DWARF, in which case we just
1410 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1411 info
= &data
->eh_frame
;
1412 else if (section_is_p (section_name
, FRAME_SECTION
))
1413 info
= &data
->frame
;
1417 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1418 /* We haven't read this section in yet. Do it now. */
1419 dwarf2_read_section (objfile
, info
);
1421 *sectp
= info
->asection
;
1422 *bufp
= info
->buffer
;
1423 *sizep
= info
->size
;
1426 /* Build a partial symbol table. */
1429 dwarf2_build_psymtabs (struct objfile
*objfile
)
1431 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1433 init_psymbol_list (objfile
, 1024);
1436 dwarf2_build_psymtabs_hard (objfile
);
1439 /* Return TRUE if OFFSET is within CU_HEADER. */
1442 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1444 unsigned int bottom
= cu_header
->offset
;
1445 unsigned int top
= (cu_header
->offset
1447 + cu_header
->initial_length_size
);
1449 return (offset
>= bottom
&& offset
< top
);
1452 /* Read in the comp unit header information from the debug_info at info_ptr.
1453 NOTE: This leaves members offset, first_die_offset to be filled in
1457 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1458 gdb_byte
*info_ptr
, bfd
*abfd
)
1461 unsigned int bytes_read
;
1463 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1464 cu_header
->initial_length_size
= bytes_read
;
1465 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1466 info_ptr
+= bytes_read
;
1467 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1469 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1471 info_ptr
+= bytes_read
;
1472 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1474 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1475 if (signed_addr
< 0)
1476 internal_error (__FILE__
, __LINE__
,
1477 _("read_comp_unit_head: dwarf from non elf file"));
1478 cu_header
->signed_addr_p
= signed_addr
;
1484 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1485 gdb_byte
*buffer
, unsigned int buffer_size
,
1488 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1490 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1492 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
1493 error (_("Dwarf Error: wrong version in compilation unit header "
1494 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
1495 bfd_get_filename (abfd
));
1497 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1498 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1499 "(offset 0x%lx + 6) [in module %s]"),
1500 (long) header
->abbrev_offset
,
1501 (long) (beg_of_comp_unit
- buffer
),
1502 bfd_get_filename (abfd
));
1504 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1505 > buffer
+ buffer_size
)
1506 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1507 "(offset 0x%lx + 0) [in module %s]"),
1508 (long) header
->length
,
1509 (long) (beg_of_comp_unit
- buffer
),
1510 bfd_get_filename (abfd
));
1515 /* Read in the types comp unit header information from .debug_types entry at
1516 types_ptr. The result is a pointer to one past the end of the header. */
1519 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1520 ULONGEST
*signature
,
1521 gdb_byte
*types_ptr
, bfd
*abfd
)
1523 gdb_byte
*initial_types_ptr
= types_ptr
;
1525 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
1526 &dwarf2_per_objfile
->types
);
1527 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1529 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1531 *signature
= read_8_bytes (abfd
, types_ptr
);
1533 types_ptr
+= cu_header
->offset_size
;
1534 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1539 /* Allocate a new partial symtab for file named NAME and mark this new
1540 partial symtab as being an include of PST. */
1543 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1544 struct objfile
*objfile
)
1546 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1548 subpst
->section_offsets
= pst
->section_offsets
;
1549 subpst
->textlow
= 0;
1550 subpst
->texthigh
= 0;
1552 subpst
->dependencies
= (struct partial_symtab
**)
1553 obstack_alloc (&objfile
->objfile_obstack
,
1554 sizeof (struct partial_symtab
*));
1555 subpst
->dependencies
[0] = pst
;
1556 subpst
->number_of_dependencies
= 1;
1558 subpst
->globals_offset
= 0;
1559 subpst
->n_global_syms
= 0;
1560 subpst
->statics_offset
= 0;
1561 subpst
->n_static_syms
= 0;
1562 subpst
->symtab
= NULL
;
1563 subpst
->read_symtab
= pst
->read_symtab
;
1566 /* No private part is necessary for include psymtabs. This property
1567 can be used to differentiate between such include psymtabs and
1568 the regular ones. */
1569 subpst
->read_symtab_private
= NULL
;
1572 /* Read the Line Number Program data and extract the list of files
1573 included by the source file represented by PST. Build an include
1574 partial symtab for each of these included files. */
1577 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1578 struct die_info
*die
,
1579 struct partial_symtab
*pst
)
1581 struct objfile
*objfile
= cu
->objfile
;
1582 bfd
*abfd
= objfile
->obfd
;
1583 struct line_header
*lh
= NULL
;
1584 struct attribute
*attr
;
1586 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1589 unsigned int line_offset
= DW_UNSND (attr
);
1591 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1594 return; /* No linetable, so no includes. */
1596 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1598 free_line_header (lh
);
1602 hash_type_signature (const void *item
)
1604 const struct signatured_type
*type_sig
= item
;
1606 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1607 return type_sig
->signature
;
1611 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1613 const struct signatured_type
*lhs
= item_lhs
;
1614 const struct signatured_type
*rhs
= item_rhs
;
1616 return lhs
->signature
== rhs
->signature
;
1619 /* Create the hash table of all entries in the .debug_types section.
1620 The result is zero if there is an error (e.g. missing .debug_types section),
1621 otherwise non-zero. */
1624 create_debug_types_hash_table (struct objfile
*objfile
)
1629 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1630 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1632 if (info_ptr
== NULL
)
1634 dwarf2_per_objfile
->signatured_types
= NULL
;
1638 types_htab
= htab_create_alloc_ex (41,
1639 hash_type_signature
,
1642 &objfile
->objfile_obstack
,
1643 hashtab_obstack_allocate
,
1644 dummy_obstack_deallocate
);
1646 if (dwarf2_die_debug
)
1647 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1649 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1651 unsigned int offset
;
1652 unsigned int offset_size
;
1653 unsigned int type_offset
;
1654 unsigned int length
, initial_length_size
;
1655 unsigned short version
;
1657 struct signatured_type
*type_sig
;
1659 gdb_byte
*ptr
= info_ptr
;
1661 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1663 /* We need to read the type's signature in order to build the hash
1664 table, but we don't need to read anything else just yet. */
1666 /* Sanity check to ensure entire cu is present. */
1667 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1668 if (ptr
+ length
+ initial_length_size
1669 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1671 complaint (&symfile_complaints
,
1672 _("debug type entry runs off end of `.debug_types' section, ignored"));
1676 offset_size
= initial_length_size
== 4 ? 4 : 8;
1677 ptr
+= initial_length_size
;
1678 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1680 ptr
+= offset_size
; /* abbrev offset */
1681 ptr
+= 1; /* address size */
1682 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1684 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1686 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1687 memset (type_sig
, 0, sizeof (*type_sig
));
1688 type_sig
->signature
= signature
;
1689 type_sig
->offset
= offset
;
1690 type_sig
->type_offset
= type_offset
;
1692 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1693 gdb_assert (slot
!= NULL
);
1696 if (dwarf2_die_debug
)
1697 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1698 offset
, phex (signature
, sizeof (signature
)));
1700 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1703 dwarf2_per_objfile
->signatured_types
= types_htab
;
1708 /* Lookup a signature based type.
1709 Returns NULL if SIG is not present in the table. */
1711 static struct signatured_type
*
1712 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1714 struct signatured_type find_entry
, *entry
;
1716 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1718 complaint (&symfile_complaints
,
1719 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1723 find_entry
.signature
= sig
;
1724 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1728 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1731 init_cu_die_reader (struct die_reader_specs
*reader
,
1732 struct dwarf2_cu
*cu
)
1734 reader
->abfd
= cu
->objfile
->obfd
;
1736 if (cu
->per_cu
->from_debug_types
)
1738 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1739 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1743 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1744 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1748 /* Find the base address of the compilation unit for range lists and
1749 location lists. It will normally be specified by DW_AT_low_pc.
1750 In DWARF-3 draft 4, the base address could be overridden by
1751 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1752 compilation units with discontinuous ranges. */
1755 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1757 struct attribute
*attr
;
1760 cu
->base_address
= 0;
1762 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1765 cu
->base_address
= DW_ADDR (attr
);
1770 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1773 cu
->base_address
= DW_ADDR (attr
);
1779 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1780 to combine the common parts.
1781 Process a compilation unit for a psymtab.
1782 BUFFER is a pointer to the beginning of the dwarf section buffer,
1783 either .debug_info or debug_types.
1784 INFO_PTR is a pointer to the start of the CU.
1785 Returns a pointer to the next CU. */
1788 process_psymtab_comp_unit (struct objfile
*objfile
,
1789 struct dwarf2_per_cu_data
*this_cu
,
1790 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1791 unsigned int buffer_size
)
1793 bfd
*abfd
= objfile
->obfd
;
1794 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1795 struct die_info
*comp_unit_die
;
1796 struct partial_symtab
*pst
;
1798 struct cleanup
*back_to_inner
;
1799 struct dwarf2_cu cu
;
1800 int has_children
, has_pc_info
;
1801 struct attribute
*attr
;
1802 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1803 struct die_reader_specs reader_specs
;
1805 memset (&cu
, 0, sizeof (cu
));
1806 cu
.objfile
= objfile
;
1807 obstack_init (&cu
.comp_unit_obstack
);
1809 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1811 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1812 buffer
, buffer_size
,
1815 /* Complete the cu_header. */
1816 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1817 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1819 cu
.list_in_scope
= &file_symbols
;
1821 /* If this compilation unit was already read in, free the
1822 cached copy in order to read it in again. This is
1823 necessary because we skipped some symbols when we first
1824 read in the compilation unit (see load_partial_dies).
1825 This problem could be avoided, but the benefit is
1827 if (this_cu
->cu
!= NULL
)
1828 free_one_cached_comp_unit (this_cu
->cu
);
1830 /* Note that this is a pointer to our stack frame, being
1831 added to a global data structure. It will be cleaned up
1832 in free_stack_comp_unit when we finish with this
1833 compilation unit. */
1835 cu
.per_cu
= this_cu
;
1837 /* Read the abbrevs for this compilation unit into a table. */
1838 dwarf2_read_abbrevs (abfd
, &cu
);
1839 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1841 /* Read the compilation unit die. */
1842 if (this_cu
->from_debug_types
)
1843 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1844 init_cu_die_reader (&reader_specs
, &cu
);
1845 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1848 if (this_cu
->from_debug_types
)
1850 /* offset,length haven't been set yet for type units. */
1851 this_cu
->offset
= cu
.header
.offset
;
1852 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1854 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1856 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1857 + cu
.header
.initial_length_size
);
1858 do_cleanups (back_to_inner
);
1862 /* Set the language we're debugging. */
1863 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1865 set_cu_language (DW_UNSND (attr
), &cu
);
1867 set_cu_language (language_minimal
, &cu
);
1869 /* Allocate a new partial symbol table structure. */
1870 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1871 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1872 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1873 /* TEXTLOW and TEXTHIGH are set below. */
1875 objfile
->global_psymbols
.next
,
1876 objfile
->static_psymbols
.next
);
1878 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1880 pst
->dirname
= DW_STRING (attr
);
1882 pst
->read_symtab_private
= this_cu
;
1884 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1886 /* Store the function that reads in the rest of the symbol table */
1887 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1889 this_cu
->psymtab
= pst
;
1891 dwarf2_find_base_address (comp_unit_die
, &cu
);
1893 /* Possibly set the default values of LOWPC and HIGHPC from
1895 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1896 &best_highpc
, &cu
, pst
);
1897 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1898 /* Store the contiguous range if it is not empty; it can be empty for
1899 CUs with no code. */
1900 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1901 best_lowpc
+ baseaddr
,
1902 best_highpc
+ baseaddr
- 1, pst
);
1904 /* Check if comp unit has_children.
1905 If so, read the rest of the partial symbols from this comp unit.
1906 If not, there's no more debug_info for this comp unit. */
1909 struct partial_die_info
*first_die
;
1910 CORE_ADDR lowpc
, highpc
;
1912 lowpc
= ((CORE_ADDR
) -1);
1913 highpc
= ((CORE_ADDR
) 0);
1915 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1917 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1918 ! has_pc_info
, &cu
);
1920 /* If we didn't find a lowpc, set it to highpc to avoid
1921 complaints from `maint check'. */
1922 if (lowpc
== ((CORE_ADDR
) -1))
1925 /* If the compilation unit didn't have an explicit address range,
1926 then use the information extracted from its child dies. */
1930 best_highpc
= highpc
;
1933 pst
->textlow
= best_lowpc
+ baseaddr
;
1934 pst
->texthigh
= best_highpc
+ baseaddr
;
1936 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1937 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1938 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1939 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1940 sort_pst_symbols (pst
);
1942 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1943 + cu
.header
.initial_length_size
);
1945 if (this_cu
->from_debug_types
)
1947 /* It's not clear we want to do anything with stmt lists here.
1948 Waiting to see what gcc ultimately does. */
1952 /* Get the list of files included in the current compilation unit,
1953 and build a psymtab for each of them. */
1954 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1957 do_cleanups (back_to_inner
);
1962 /* Traversal function for htab_traverse_noresize.
1963 Process one .debug_types comp-unit. */
1966 process_type_comp_unit (void **slot
, void *info
)
1968 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1969 struct objfile
*objfile
= (struct objfile
*) info
;
1970 struct dwarf2_per_cu_data
*this_cu
;
1972 this_cu
= &entry
->per_cu
;
1973 this_cu
->from_debug_types
= 1;
1975 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1976 process_psymtab_comp_unit (objfile
, this_cu
,
1977 dwarf2_per_objfile
->types
.buffer
,
1978 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1979 dwarf2_per_objfile
->types
.size
);
1984 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1985 Build partial symbol tables for the .debug_types comp-units. */
1988 build_type_psymtabs (struct objfile
*objfile
)
1990 if (! create_debug_types_hash_table (objfile
))
1993 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
1994 process_type_comp_unit
, objfile
);
1997 /* Build the partial symbol table by doing a quick pass through the
1998 .debug_info and .debug_abbrev sections. */
2001 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2004 struct cleanup
*back_to
;
2006 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2007 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2009 /* Any cached compilation units will be linked by the per-objfile
2010 read_in_chain. Make sure to free them when we're done. */
2011 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2013 build_type_psymtabs (objfile
);
2015 create_all_comp_units (objfile
);
2017 objfile
->psymtabs_addrmap
=
2018 addrmap_create_mutable (&objfile
->objfile_obstack
);
2020 /* Since the objects we're extracting from .debug_info vary in
2021 length, only the individual functions to extract them (like
2022 read_comp_unit_head and load_partial_die) can really know whether
2023 the buffer is large enough to hold another complete object.
2025 At the moment, they don't actually check that. If .debug_info
2026 holds just one extra byte after the last compilation unit's dies,
2027 then read_comp_unit_head will happily read off the end of the
2028 buffer. read_partial_die is similarly casual. Those functions
2031 For this loop condition, simply checking whether there's any data
2032 left at all should be sufficient. */
2034 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2035 + dwarf2_per_objfile
->info
.size
))
2037 struct dwarf2_per_cu_data
*this_cu
;
2039 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2042 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2043 dwarf2_per_objfile
->info
.buffer
,
2045 dwarf2_per_objfile
->info
.size
);
2048 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2049 &objfile
->objfile_obstack
);
2051 do_cleanups (back_to
);
2054 /* Load the partial DIEs for a secondary CU into memory. */
2057 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2058 struct objfile
*objfile
)
2060 bfd
*abfd
= objfile
->obfd
;
2061 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2062 struct die_info
*comp_unit_die
;
2063 struct dwarf2_cu
*cu
;
2064 struct cleanup
*back_to
;
2065 struct attribute
*attr
;
2067 struct die_reader_specs reader_specs
;
2069 gdb_assert (! this_cu
->from_debug_types
);
2071 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2072 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2073 beg_of_comp_unit
= info_ptr
;
2075 cu
= alloc_one_comp_unit (objfile
);
2077 /* ??? Missing cleanup for CU? */
2079 /* Link this compilation unit into the compilation unit tree. */
2081 cu
->per_cu
= this_cu
;
2082 cu
->type_hash
= this_cu
->type_hash
;
2084 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2085 dwarf2_per_objfile
->info
.buffer
,
2086 dwarf2_per_objfile
->info
.size
,
2089 /* Complete the cu_header. */
2090 cu
->header
.offset
= this_cu
->offset
;
2091 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2093 /* Read the abbrevs for this compilation unit into a table. */
2094 dwarf2_read_abbrevs (abfd
, cu
);
2095 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2097 /* Read the compilation unit die. */
2098 init_cu_die_reader (&reader_specs
, cu
);
2099 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2102 /* Set the language we're debugging. */
2103 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2105 set_cu_language (DW_UNSND (attr
), cu
);
2107 set_cu_language (language_minimal
, cu
);
2109 /* Check if comp unit has_children.
2110 If so, read the rest of the partial symbols from this comp unit.
2111 If not, there's no more debug_info for this comp unit. */
2113 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2115 do_cleanups (back_to
);
2118 /* Create a list of all compilation units in OBJFILE. We do this only
2119 if an inter-comp-unit reference is found; presumably if there is one,
2120 there will be many, and one will occur early in the .debug_info section.
2121 So there's no point in building this list incrementally. */
2124 create_all_comp_units (struct objfile
*objfile
)
2128 struct dwarf2_per_cu_data
**all_comp_units
;
2131 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2132 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2136 all_comp_units
= xmalloc (n_allocated
2137 * sizeof (struct dwarf2_per_cu_data
*));
2139 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2141 unsigned int length
, initial_length_size
;
2142 struct dwarf2_per_cu_data
*this_cu
;
2143 unsigned int offset
;
2145 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2147 /* Read just enough information to find out where the next
2148 compilation unit is. */
2149 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2150 &initial_length_size
);
2152 /* Save the compilation unit for later lookup. */
2153 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2154 sizeof (struct dwarf2_per_cu_data
));
2155 memset (this_cu
, 0, sizeof (*this_cu
));
2156 this_cu
->offset
= offset
;
2157 this_cu
->length
= length
+ initial_length_size
;
2159 if (n_comp_units
== n_allocated
)
2162 all_comp_units
= xrealloc (all_comp_units
,
2164 * sizeof (struct dwarf2_per_cu_data
*));
2166 all_comp_units
[n_comp_units
++] = this_cu
;
2168 info_ptr
= info_ptr
+ this_cu
->length
;
2171 dwarf2_per_objfile
->all_comp_units
2172 = obstack_alloc (&objfile
->objfile_obstack
,
2173 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2174 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2175 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2176 xfree (all_comp_units
);
2177 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2180 /* Process all loaded DIEs for compilation unit CU, starting at
2181 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2182 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2183 DW_AT_ranges). If NEED_PC is set, then this function will set
2184 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2185 and record the covered ranges in the addrmap. */
2188 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2189 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2191 struct partial_die_info
*pdi
;
2193 /* Now, march along the PDI's, descending into ones which have
2194 interesting children but skipping the children of the other ones,
2195 until we reach the end of the compilation unit. */
2201 fixup_partial_die (pdi
, cu
);
2203 /* Anonymous namespaces have no name but have interesting
2204 children, so we need to look at them. Ditto for anonymous
2207 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2208 || pdi
->tag
== DW_TAG_enumeration_type
)
2212 case DW_TAG_subprogram
:
2213 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2215 case DW_TAG_variable
:
2216 case DW_TAG_typedef
:
2217 case DW_TAG_union_type
:
2218 if (!pdi
->is_declaration
)
2220 add_partial_symbol (pdi
, cu
);
2223 case DW_TAG_class_type
:
2224 case DW_TAG_interface_type
:
2225 case DW_TAG_structure_type
:
2226 if (!pdi
->is_declaration
)
2228 add_partial_symbol (pdi
, cu
);
2231 case DW_TAG_enumeration_type
:
2232 if (!pdi
->is_declaration
)
2233 add_partial_enumeration (pdi
, cu
);
2235 case DW_TAG_base_type
:
2236 case DW_TAG_subrange_type
:
2237 /* File scope base type definitions are added to the partial
2239 add_partial_symbol (pdi
, cu
);
2241 case DW_TAG_namespace
:
2242 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2245 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2252 /* If the die has a sibling, skip to the sibling. */
2254 pdi
= pdi
->die_sibling
;
2258 /* Functions used to compute the fully scoped name of a partial DIE.
2260 Normally, this is simple. For C++, the parent DIE's fully scoped
2261 name is concatenated with "::" and the partial DIE's name. For
2262 Java, the same thing occurs except that "." is used instead of "::".
2263 Enumerators are an exception; they use the scope of their parent
2264 enumeration type, i.e. the name of the enumeration type is not
2265 prepended to the enumerator.
2267 There are two complexities. One is DW_AT_specification; in this
2268 case "parent" means the parent of the target of the specification,
2269 instead of the direct parent of the DIE. The other is compilers
2270 which do not emit DW_TAG_namespace; in this case we try to guess
2271 the fully qualified name of structure types from their members'
2272 linkage names. This must be done using the DIE's children rather
2273 than the children of any DW_AT_specification target. We only need
2274 to do this for structures at the top level, i.e. if the target of
2275 any DW_AT_specification (if any; otherwise the DIE itself) does not
2278 /* Compute the scope prefix associated with PDI's parent, in
2279 compilation unit CU. The result will be allocated on CU's
2280 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2281 field. NULL is returned if no prefix is necessary. */
2283 partial_die_parent_scope (struct partial_die_info
*pdi
,
2284 struct dwarf2_cu
*cu
)
2286 char *grandparent_scope
;
2287 struct partial_die_info
*parent
, *real_pdi
;
2289 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2290 then this means the parent of the specification DIE. */
2293 while (real_pdi
->has_specification
)
2294 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2296 parent
= real_pdi
->die_parent
;
2300 if (parent
->scope_set
)
2301 return parent
->scope
;
2303 fixup_partial_die (parent
, cu
);
2305 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2307 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2308 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2309 Work around this problem here. */
2310 if (cu
->language
== language_cplus
2311 && parent
->tag
== DW_TAG_namespace
2312 && strcmp (parent
->name
, "::") == 0
2313 && grandparent_scope
== NULL
)
2315 parent
->scope
= NULL
;
2316 parent
->scope_set
= 1;
2320 if (parent
->tag
== DW_TAG_namespace
2321 || parent
->tag
== DW_TAG_structure_type
2322 || parent
->tag
== DW_TAG_class_type
2323 || parent
->tag
== DW_TAG_interface_type
2324 || parent
->tag
== DW_TAG_union_type
2325 || parent
->tag
== DW_TAG_enumeration_type
)
2327 if (grandparent_scope
== NULL
)
2328 parent
->scope
= parent
->name
;
2330 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2333 else if (parent
->tag
== DW_TAG_enumerator
)
2334 /* Enumerators should not get the name of the enumeration as a prefix. */
2335 parent
->scope
= grandparent_scope
;
2338 /* FIXME drow/2004-04-01: What should we be doing with
2339 function-local names? For partial symbols, we should probably be
2341 complaint (&symfile_complaints
,
2342 _("unhandled containing DIE tag %d for DIE at %d"),
2343 parent
->tag
, pdi
->offset
);
2344 parent
->scope
= grandparent_scope
;
2347 parent
->scope_set
= 1;
2348 return parent
->scope
;
2351 /* Return the fully scoped name associated with PDI, from compilation unit
2352 CU. The result will be allocated with malloc. */
2354 partial_die_full_name (struct partial_die_info
*pdi
,
2355 struct dwarf2_cu
*cu
)
2359 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2360 if (parent_scope
== NULL
)
2363 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2367 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2369 struct objfile
*objfile
= cu
->objfile
;
2371 char *actual_name
= NULL
;
2372 const struct partial_symbol
*psym
= NULL
;
2374 int built_actual_name
= 0;
2376 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2378 actual_name
= partial_die_full_name (pdi
, cu
);
2380 built_actual_name
= 1;
2382 if (actual_name
== NULL
)
2383 actual_name
= pdi
->name
;
2387 case DW_TAG_subprogram
:
2388 if (pdi
->is_external
|| cu
->language
== language_ada
)
2390 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2391 of the global scope. But in Ada, we want to be able to access
2392 nested procedures globally. So all Ada subprograms are stored
2393 in the global scope. */
2394 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2395 mst_text, objfile); */
2396 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2398 VAR_DOMAIN
, LOC_BLOCK
,
2399 &objfile
->global_psymbols
,
2400 0, pdi
->lowpc
+ baseaddr
,
2401 cu
->language
, objfile
);
2405 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2406 mst_file_text, objfile); */
2407 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2409 VAR_DOMAIN
, LOC_BLOCK
,
2410 &objfile
->static_psymbols
,
2411 0, pdi
->lowpc
+ baseaddr
,
2412 cu
->language
, objfile
);
2415 case DW_TAG_variable
:
2416 if (pdi
->is_external
)
2419 Don't enter into the minimal symbol tables as there is
2420 a minimal symbol table entry from the ELF symbols already.
2421 Enter into partial symbol table if it has a location
2422 descriptor or a type.
2423 If the location descriptor is missing, new_symbol will create
2424 a LOC_UNRESOLVED symbol, the address of the variable will then
2425 be determined from the minimal symbol table whenever the variable
2427 The address for the partial symbol table entry is not
2428 used by GDB, but it comes in handy for debugging partial symbol
2432 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2433 if (pdi
->locdesc
|| pdi
->has_type
)
2434 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2436 VAR_DOMAIN
, LOC_STATIC
,
2437 &objfile
->global_psymbols
,
2439 cu
->language
, objfile
);
2443 /* Static Variable. Skip symbols without location descriptors. */
2444 if (pdi
->locdesc
== NULL
)
2446 if (built_actual_name
)
2447 xfree (actual_name
);
2450 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2451 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2452 mst_file_data, objfile); */
2453 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2455 VAR_DOMAIN
, LOC_STATIC
,
2456 &objfile
->static_psymbols
,
2458 cu
->language
, objfile
);
2461 case DW_TAG_typedef
:
2462 case DW_TAG_base_type
:
2463 case DW_TAG_subrange_type
:
2464 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2466 VAR_DOMAIN
, LOC_TYPEDEF
,
2467 &objfile
->static_psymbols
,
2468 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2470 case DW_TAG_namespace
:
2471 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2473 VAR_DOMAIN
, LOC_TYPEDEF
,
2474 &objfile
->global_psymbols
,
2475 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2477 case DW_TAG_class_type
:
2478 case DW_TAG_interface_type
:
2479 case DW_TAG_structure_type
:
2480 case DW_TAG_union_type
:
2481 case DW_TAG_enumeration_type
:
2482 /* Skip external references. The DWARF standard says in the section
2483 about "Structure, Union, and Class Type Entries": "An incomplete
2484 structure, union or class type is represented by a structure,
2485 union or class entry that does not have a byte size attribute
2486 and that has a DW_AT_declaration attribute." */
2487 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2489 if (built_actual_name
)
2490 xfree (actual_name
);
2494 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2495 static vs. global. */
2496 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2498 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2499 (cu
->language
== language_cplus
2500 || cu
->language
== language_java
)
2501 ? &objfile
->global_psymbols
2502 : &objfile
->static_psymbols
,
2503 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2506 case DW_TAG_enumerator
:
2507 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2509 VAR_DOMAIN
, LOC_CONST
,
2510 (cu
->language
== language_cplus
2511 || cu
->language
== language_java
)
2512 ? &objfile
->global_psymbols
2513 : &objfile
->static_psymbols
,
2514 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2520 if (built_actual_name
)
2521 xfree (actual_name
);
2524 /* Read a partial die corresponding to a namespace; also, add a symbol
2525 corresponding to that namespace to the symbol table. NAMESPACE is
2526 the name of the enclosing namespace. */
2529 add_partial_namespace (struct partial_die_info
*pdi
,
2530 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2531 int need_pc
, struct dwarf2_cu
*cu
)
2533 /* Add a symbol for the namespace. */
2535 add_partial_symbol (pdi
, cu
);
2537 /* Now scan partial symbols in that namespace. */
2539 if (pdi
->has_children
)
2540 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2543 /* Read a partial die corresponding to a Fortran module. */
2546 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2547 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2549 /* Now scan partial symbols in that module.
2551 FIXME: Support the separate Fortran module namespaces. */
2553 if (pdi
->has_children
)
2554 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2557 /* Read a partial die corresponding to a subprogram and create a partial
2558 symbol for that subprogram. When the CU language allows it, this
2559 routine also defines a partial symbol for each nested subprogram
2560 that this subprogram contains.
2562 DIE my also be a lexical block, in which case we simply search
2563 recursively for suprograms defined inside that lexical block.
2564 Again, this is only performed when the CU language allows this
2565 type of definitions. */
2568 add_partial_subprogram (struct partial_die_info
*pdi
,
2569 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2570 int need_pc
, struct dwarf2_cu
*cu
)
2572 if (pdi
->tag
== DW_TAG_subprogram
)
2574 if (pdi
->has_pc_info
)
2576 if (pdi
->lowpc
< *lowpc
)
2577 *lowpc
= pdi
->lowpc
;
2578 if (pdi
->highpc
> *highpc
)
2579 *highpc
= pdi
->highpc
;
2583 struct objfile
*objfile
= cu
->objfile
;
2585 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2586 SECT_OFF_TEXT (objfile
));
2587 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2588 pdi
->lowpc
+ baseaddr
,
2589 pdi
->highpc
- 1 + baseaddr
,
2590 cu
->per_cu
->psymtab
);
2592 if (!pdi
->is_declaration
)
2593 /* Ignore subprogram DIEs that do not have a name, they are
2594 illegal. Do not emit a complaint at this point, we will
2595 do so when we convert this psymtab into a symtab. */
2597 add_partial_symbol (pdi
, cu
);
2601 if (! pdi
->has_children
)
2604 if (cu
->language
== language_ada
)
2606 pdi
= pdi
->die_child
;
2609 fixup_partial_die (pdi
, cu
);
2610 if (pdi
->tag
== DW_TAG_subprogram
2611 || pdi
->tag
== DW_TAG_lexical_block
)
2612 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2613 pdi
= pdi
->die_sibling
;
2618 /* See if we can figure out if the class lives in a namespace. We do
2619 this by looking for a member function; its demangled name will
2620 contain namespace info, if there is any. */
2623 guess_structure_name (struct partial_die_info
*struct_pdi
,
2624 struct dwarf2_cu
*cu
)
2626 if ((cu
->language
== language_cplus
2627 || cu
->language
== language_java
)
2628 && cu
->has_namespace_info
== 0
2629 && struct_pdi
->has_children
)
2631 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2632 what template types look like, because the demangler
2633 frequently doesn't give the same name as the debug info. We
2634 could fix this by only using the demangled name to get the
2635 prefix (but see comment in read_structure_type). */
2637 struct partial_die_info
*real_pdi
;
2639 /* If this DIE (this DIE's specification, if any) has a parent, then
2640 we should not do this. We'll prepend the parent's fully qualified
2641 name when we create the partial symbol. */
2643 real_pdi
= struct_pdi
;
2644 while (real_pdi
->has_specification
)
2645 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2647 if (real_pdi
->die_parent
!= NULL
)
2652 /* Read a partial die corresponding to an enumeration type. */
2655 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2656 struct dwarf2_cu
*cu
)
2658 struct partial_die_info
*pdi
;
2660 if (enum_pdi
->name
!= NULL
)
2661 add_partial_symbol (enum_pdi
, cu
);
2663 pdi
= enum_pdi
->die_child
;
2666 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2667 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2669 add_partial_symbol (pdi
, cu
);
2670 pdi
= pdi
->die_sibling
;
2674 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2675 Return the corresponding abbrev, or NULL if the number is zero (indicating
2676 an empty DIE). In either case *BYTES_READ will be set to the length of
2677 the initial number. */
2679 static struct abbrev_info
*
2680 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2681 struct dwarf2_cu
*cu
)
2683 bfd
*abfd
= cu
->objfile
->obfd
;
2684 unsigned int abbrev_number
;
2685 struct abbrev_info
*abbrev
;
2687 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2689 if (abbrev_number
== 0)
2692 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2695 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2696 bfd_get_filename (abfd
));
2702 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2703 Returns a pointer to the end of a series of DIEs, terminated by an empty
2704 DIE. Any children of the skipped DIEs will also be skipped. */
2707 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2709 struct abbrev_info
*abbrev
;
2710 unsigned int bytes_read
;
2714 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2716 return info_ptr
+ bytes_read
;
2718 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2722 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2723 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2724 abbrev corresponding to that skipped uleb128 should be passed in
2725 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2729 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2730 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2732 unsigned int bytes_read
;
2733 struct attribute attr
;
2734 bfd
*abfd
= cu
->objfile
->obfd
;
2735 unsigned int form
, i
;
2737 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2739 /* The only abbrev we care about is DW_AT_sibling. */
2740 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2742 read_attribute (&attr
, &abbrev
->attrs
[i
],
2743 abfd
, info_ptr
, cu
);
2744 if (attr
.form
== DW_FORM_ref_addr
)
2745 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2747 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2750 /* If it isn't DW_AT_sibling, skip this attribute. */
2751 form
= abbrev
->attrs
[i
].form
;
2755 case DW_FORM_ref_addr
:
2756 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2757 and later it is offset sized. */
2758 if (cu
->header
.version
== 2)
2759 info_ptr
+= cu
->header
.addr_size
;
2761 info_ptr
+= cu
->header
.offset_size
;
2764 info_ptr
+= cu
->header
.addr_size
;
2771 case DW_FORM_flag_present
:
2786 case DW_FORM_string
:
2787 read_string (abfd
, info_ptr
, &bytes_read
);
2788 info_ptr
+= bytes_read
;
2790 case DW_FORM_sec_offset
:
2792 info_ptr
+= cu
->header
.offset_size
;
2794 case DW_FORM_exprloc
:
2796 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2797 info_ptr
+= bytes_read
;
2799 case DW_FORM_block1
:
2800 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2802 case DW_FORM_block2
:
2803 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2805 case DW_FORM_block4
:
2806 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2810 case DW_FORM_ref_udata
:
2811 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2813 case DW_FORM_indirect
:
2814 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2815 info_ptr
+= bytes_read
;
2816 /* We need to continue parsing from here, so just go back to
2818 goto skip_attribute
;
2821 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2822 dwarf_form_name (form
),
2823 bfd_get_filename (abfd
));
2827 if (abbrev
->has_children
)
2828 return skip_children (buffer
, info_ptr
, cu
);
2833 /* Locate ORIG_PDI's sibling.
2834 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2838 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2839 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2840 bfd
*abfd
, struct dwarf2_cu
*cu
)
2842 /* Do we know the sibling already? */
2844 if (orig_pdi
->sibling
)
2845 return orig_pdi
->sibling
;
2847 /* Are there any children to deal with? */
2849 if (!orig_pdi
->has_children
)
2852 /* Skip the children the long way. */
2854 return skip_children (buffer
, info_ptr
, cu
);
2857 /* Expand this partial symbol table into a full symbol table. */
2860 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2862 /* FIXME: This is barely more than a stub. */
2867 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2873 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2874 gdb_flush (gdb_stdout
);
2877 /* Restore our global data. */
2878 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2879 dwarf2_objfile_data_key
);
2881 /* If this psymtab is constructed from a debug-only objfile, the
2882 has_section_at_zero flag will not necessarily be correct. We
2883 can get the correct value for this flag by looking at the data
2884 associated with the (presumably stripped) associated objfile. */
2885 if (pst
->objfile
->separate_debug_objfile_backlink
)
2887 struct dwarf2_per_objfile
*dpo_backlink
2888 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2889 dwarf2_objfile_data_key
);
2891 dwarf2_per_objfile
->has_section_at_zero
2892 = dpo_backlink
->has_section_at_zero
;
2895 psymtab_to_symtab_1 (pst
);
2897 /* Finish up the debug error message. */
2899 printf_filtered (_("done.\n"));
2904 /* Add PER_CU to the queue. */
2907 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2909 struct dwarf2_queue_item
*item
;
2912 item
= xmalloc (sizeof (*item
));
2913 item
->per_cu
= per_cu
;
2916 if (dwarf2_queue
== NULL
)
2917 dwarf2_queue
= item
;
2919 dwarf2_queue_tail
->next
= item
;
2921 dwarf2_queue_tail
= item
;
2924 /* Process the queue. */
2927 process_queue (struct objfile
*objfile
)
2929 struct dwarf2_queue_item
*item
, *next_item
;
2931 /* The queue starts out with one item, but following a DIE reference
2932 may load a new CU, adding it to the end of the queue. */
2933 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2935 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2936 process_full_comp_unit (item
->per_cu
);
2938 item
->per_cu
->queued
= 0;
2939 next_item
= item
->next
;
2943 dwarf2_queue_tail
= NULL
;
2946 /* Free all allocated queue entries. This function only releases anything if
2947 an error was thrown; if the queue was processed then it would have been
2948 freed as we went along. */
2951 dwarf2_release_queue (void *dummy
)
2953 struct dwarf2_queue_item
*item
, *last
;
2955 item
= dwarf2_queue
;
2958 /* Anything still marked queued is likely to be in an
2959 inconsistent state, so discard it. */
2960 if (item
->per_cu
->queued
)
2962 if (item
->per_cu
->cu
!= NULL
)
2963 free_one_cached_comp_unit (item
->per_cu
->cu
);
2964 item
->per_cu
->queued
= 0;
2972 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2975 /* Read in full symbols for PST, and anything it depends on. */
2978 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2980 struct dwarf2_per_cu_data
*per_cu
;
2981 struct cleanup
*back_to
;
2984 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2985 if (!pst
->dependencies
[i
]->readin
)
2987 /* Inform about additional files that need to be read in. */
2990 /* FIXME: i18n: Need to make this a single string. */
2991 fputs_filtered (" ", gdb_stdout
);
2993 fputs_filtered ("and ", gdb_stdout
);
2995 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2996 wrap_here (""); /* Flush output */
2997 gdb_flush (gdb_stdout
);
2999 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3002 per_cu
= pst
->read_symtab_private
;
3006 /* It's an include file, no symbols to read for it.
3007 Everything is in the parent symtab. */
3012 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3014 queue_comp_unit (per_cu
, pst
->objfile
);
3016 if (per_cu
->from_debug_types
)
3017 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3019 load_full_comp_unit (per_cu
, pst
->objfile
);
3021 process_queue (pst
->objfile
);
3023 /* Age the cache, releasing compilation units that have not
3024 been used recently. */
3025 age_cached_comp_units ();
3027 do_cleanups (back_to
);
3030 /* Load the DIEs associated with PER_CU into memory. */
3033 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3035 bfd
*abfd
= objfile
->obfd
;
3036 struct dwarf2_cu
*cu
;
3037 unsigned int offset
;
3038 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3039 struct cleanup
*back_to
, *free_cu_cleanup
;
3040 struct attribute
*attr
;
3042 gdb_assert (! per_cu
->from_debug_types
);
3044 /* Set local variables from the partial symbol table info. */
3045 offset
= per_cu
->offset
;
3047 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3048 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3049 beg_of_comp_unit
= info_ptr
;
3051 cu
= alloc_one_comp_unit (objfile
);
3053 /* If an error occurs while loading, release our storage. */
3054 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3056 /* Read in the comp_unit header. */
3057 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3059 /* Complete the cu_header. */
3060 cu
->header
.offset
= offset
;
3061 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3063 /* Read the abbrevs for this compilation unit. */
3064 dwarf2_read_abbrevs (abfd
, cu
);
3065 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3067 /* Link this compilation unit into the compilation unit tree. */
3069 cu
->per_cu
= per_cu
;
3070 cu
->type_hash
= per_cu
->type_hash
;
3072 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3074 /* We try not to read any attributes in this function, because not
3075 all objfiles needed for references have been loaded yet, and symbol
3076 table processing isn't initialized. But we have to set the CU language,
3077 or we won't be able to build types correctly. */
3078 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3080 set_cu_language (DW_UNSND (attr
), cu
);
3082 set_cu_language (language_minimal
, cu
);
3084 /* Similarly, if we do not read the producer, we can not apply
3085 producer-specific interpretation. */
3086 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3088 cu
->producer
= DW_STRING (attr
);
3090 /* Link this CU into read_in_chain. */
3091 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3092 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3094 do_cleanups (back_to
);
3096 /* We've successfully allocated this compilation unit. Let our caller
3097 clean it up when finished with it. */
3098 discard_cleanups (free_cu_cleanup
);
3101 /* Generate full symbol information for PST and CU, whose DIEs have
3102 already been loaded into memory. */
3105 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3107 struct partial_symtab
*pst
= per_cu
->psymtab
;
3108 struct dwarf2_cu
*cu
= per_cu
->cu
;
3109 struct objfile
*objfile
= pst
->objfile
;
3110 CORE_ADDR lowpc
, highpc
;
3111 struct symtab
*symtab
;
3112 struct cleanup
*back_to
;
3115 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3118 back_to
= make_cleanup (really_free_pendings
, NULL
);
3120 cu
->list_in_scope
= &file_symbols
;
3122 dwarf2_find_base_address (cu
->dies
, cu
);
3124 /* Do line number decoding in read_file_scope () */
3125 process_die (cu
->dies
, cu
);
3127 /* Some compilers don't define a DW_AT_high_pc attribute for the
3128 compilation unit. If the DW_AT_high_pc is missing, synthesize
3129 it, by scanning the DIE's below the compilation unit. */
3130 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3132 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3134 /* Set symtab language to language from DW_AT_language.
3135 If the compilation is from a C file generated by language preprocessors,
3136 do not set the language if it was already deduced by start_subfile. */
3138 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3140 symtab
->language
= cu
->language
;
3142 pst
->symtab
= symtab
;
3145 do_cleanups (back_to
);
3148 /* Process a die and its children. */
3151 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3155 case DW_TAG_padding
:
3157 case DW_TAG_compile_unit
:
3158 read_file_scope (die
, cu
);
3160 case DW_TAG_type_unit
:
3161 read_type_unit_scope (die
, cu
);
3163 case DW_TAG_subprogram
:
3164 case DW_TAG_inlined_subroutine
:
3165 read_func_scope (die
, cu
);
3167 case DW_TAG_lexical_block
:
3168 case DW_TAG_try_block
:
3169 case DW_TAG_catch_block
:
3170 read_lexical_block_scope (die
, cu
);
3172 case DW_TAG_class_type
:
3173 case DW_TAG_interface_type
:
3174 case DW_TAG_structure_type
:
3175 case DW_TAG_union_type
:
3176 process_structure_scope (die
, cu
);
3178 case DW_TAG_enumeration_type
:
3179 process_enumeration_scope (die
, cu
);
3182 /* These dies have a type, but processing them does not create
3183 a symbol or recurse to process the children. Therefore we can
3184 read them on-demand through read_type_die. */
3185 case DW_TAG_subroutine_type
:
3186 case DW_TAG_set_type
:
3187 case DW_TAG_array_type
:
3188 case DW_TAG_pointer_type
:
3189 case DW_TAG_ptr_to_member_type
:
3190 case DW_TAG_reference_type
:
3191 case DW_TAG_string_type
:
3194 case DW_TAG_base_type
:
3195 case DW_TAG_subrange_type
:
3196 case DW_TAG_typedef
:
3197 /* Add a typedef symbol for the type definition, if it has a
3199 new_symbol (die
, read_type_die (die
, cu
), cu
);
3201 case DW_TAG_common_block
:
3202 read_common_block (die
, cu
);
3204 case DW_TAG_common_inclusion
:
3206 case DW_TAG_namespace
:
3207 processing_has_namespace_info
= 1;
3208 read_namespace (die
, cu
);
3211 read_module (die
, cu
);
3213 case DW_TAG_imported_declaration
:
3214 case DW_TAG_imported_module
:
3215 processing_has_namespace_info
= 1;
3216 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3217 || cu
->language
!= language_fortran
))
3218 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3219 dwarf_tag_name (die
->tag
));
3220 read_import_statement (die
, cu
);
3223 new_symbol (die
, NULL
, cu
);
3228 /* A helper function for dwarf2_compute_name which determines whether DIE
3229 needs to have the name of the scope prepended to the name listed in the
3233 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3235 struct attribute
*attr
;
3239 case DW_TAG_namespace
:
3240 case DW_TAG_typedef
:
3241 case DW_TAG_class_type
:
3242 case DW_TAG_interface_type
:
3243 case DW_TAG_structure_type
:
3244 case DW_TAG_union_type
:
3245 case DW_TAG_enumeration_type
:
3246 case DW_TAG_enumerator
:
3247 case DW_TAG_subprogram
:
3251 case DW_TAG_variable
:
3252 /* We only need to prefix "globally" visible variables. These include
3253 any variable marked with DW_AT_external or any variable that
3254 lives in a namespace. [Variables in anonymous namespaces
3255 require prefixing, but they are not DW_AT_external.] */
3257 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3259 struct dwarf2_cu
*spec_cu
= cu
;
3261 return die_needs_namespace (die_specification (die
, &spec_cu
),
3265 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3266 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
)
3268 /* A variable in a lexical block of some kind does not need a
3269 namespace, even though in C++ such variables may be external
3270 and have a mangled name. */
3271 if (die
->parent
->tag
== DW_TAG_lexical_block
3272 || die
->parent
->tag
== DW_TAG_try_block
3273 || die
->parent
->tag
== DW_TAG_catch_block
3274 || die
->parent
->tag
== DW_TAG_subprogram
)
3283 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3284 compute the physname for the object, which include a method's
3285 formal parameters (C++/Java) and return type (Java).
3287 For Ada, return the DIE's linkage name rather than the fully qualified
3288 name. PHYSNAME is ignored..
3290 The result is allocated on the objfile_obstack and canonicalized. */
3293 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3297 name
= dwarf2_name (die
, cu
);
3299 /* These are the only languages we know how to qualify names in. */
3301 && (cu
->language
== language_cplus
|| cu
->language
== language_java
))
3303 if (die_needs_namespace (die
, cu
))
3307 struct ui_file
*buf
;
3309 prefix
= determine_prefix (die
, cu
);
3310 buf
= mem_fileopen ();
3311 if (*prefix
!= '\0')
3313 char *prefixed_name
= typename_concat (NULL
, prefix
, name
, cu
);
3315 fputs_unfiltered (prefixed_name
, buf
);
3316 xfree (prefixed_name
);
3319 fputs_unfiltered (name
? name
: "", buf
);
3321 /* For Java and C++ methods, append formal parameter type
3322 information, if PHYSNAME. */
3324 if (physname
&& die
->tag
== DW_TAG_subprogram
3325 && (cu
->language
== language_cplus
3326 || cu
->language
== language_java
))
3328 struct type
*type
= read_type_die (die
, cu
);
3330 c_type_print_args (type
, buf
, 0, cu
->language
);
3332 if (cu
->language
== language_java
)
3334 /* For java, we must append the return type to method
3336 if (die
->tag
== DW_TAG_subprogram
)
3337 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3340 else if (cu
->language
== language_cplus
)
3342 if (TYPE_NFIELDS (type
) > 0
3343 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3344 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3345 fputs_unfiltered (" const", buf
);
3349 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3351 ui_file_delete (buf
);
3353 if (cu
->language
== language_cplus
)
3356 = dwarf2_canonicalize_name (name
, cu
,
3357 &cu
->objfile
->objfile_obstack
);
3364 else if (cu
->language
== language_ada
)
3366 /* For Ada unit, we prefer the linkage name over the name, as
3367 the former contains the exported name, which the user expects
3368 to be able to reference. Ideally, we want the user to be able
3369 to reference this entity using either natural or linkage name,
3370 but we haven't started looking at this enhancement yet. */
3371 struct attribute
*attr
;
3373 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
3375 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3376 if (attr
&& DW_STRING (attr
))
3377 name
= DW_STRING (attr
);
3383 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3384 If scope qualifiers are appropriate they will be added. The result
3385 will be allocated on the objfile_obstack, or NULL if the DIE does
3386 not have a name. NAME may either be from a previous call to
3387 dwarf2_name or NULL.
3389 The output string will be canonicalized (if C++/Java). */
3392 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3394 return dwarf2_compute_name (name
, die
, cu
, 0);
3397 /* Construct a physname for the given DIE in CU. NAME may either be
3398 from a previous call to dwarf2_name or NULL. The result will be
3399 allocated on the objfile_objstack or NULL if the DIE does not have a
3402 The output string will be canonicalized (if C++/Java). */
3405 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3407 return dwarf2_compute_name (name
, die
, cu
, 1);
3410 /* Read the import statement specified by the given die and record it. */
3413 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3415 struct attribute
*import_attr
;
3416 struct die_info
*imported_die
;
3417 struct dwarf2_cu
*imported_cu
;
3418 const char *imported_name
;
3419 const char *imported_name_prefix
;
3420 const char *canonical_name
;
3421 const char *import_alias
;
3422 const char *imported_declaration
= NULL
;
3423 const char *import_prefix
;
3427 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3428 if (import_attr
== NULL
)
3430 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3431 dwarf_tag_name (die
->tag
));
3436 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3437 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3438 if (imported_name
== NULL
)
3440 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3442 The import in the following code:
3456 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3457 <52> DW_AT_decl_file : 1
3458 <53> DW_AT_decl_line : 6
3459 <54> DW_AT_import : <0x75>
3460 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3462 <5b> DW_AT_decl_file : 1
3463 <5c> DW_AT_decl_line : 2
3464 <5d> DW_AT_type : <0x6e>
3466 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3467 <76> DW_AT_byte_size : 4
3468 <77> DW_AT_encoding : 5 (signed)
3470 imports the wrong die ( 0x75 instead of 0x58 ).
3471 This case will be ignored until the gcc bug is fixed. */
3475 /* Figure out the local name after import. */
3476 import_alias
= dwarf2_name (die
, cu
);
3478 /* Figure out where the statement is being imported to. */
3479 import_prefix
= determine_prefix (die
, cu
);
3481 /* Figure out what the scope of the imported die is and prepend it
3482 to the name of the imported die. */
3483 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3485 if (imported_die
->tag
!= DW_TAG_namespace
)
3487 imported_declaration
= imported_name
;
3488 canonical_name
= imported_name_prefix
;
3490 else if (strlen (imported_name_prefix
) > 0)
3492 temp
= alloca (strlen (imported_name_prefix
)
3493 + 2 + strlen (imported_name
) + 1);
3494 strcpy (temp
, imported_name_prefix
);
3495 strcat (temp
, "::");
3496 strcat (temp
, imported_name
);
3497 canonical_name
= temp
;
3500 canonical_name
= imported_name
;
3502 cp_add_using_directive (import_prefix
,
3505 imported_declaration
,
3506 &cu
->objfile
->objfile_obstack
);
3510 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3512 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3516 free_cu_line_header (void *arg
)
3518 struct dwarf2_cu
*cu
= arg
;
3520 free_line_header (cu
->line_header
);
3521 cu
->line_header
= NULL
;
3525 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3527 struct objfile
*objfile
= cu
->objfile
;
3528 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3529 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3530 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3531 struct attribute
*attr
;
3533 char *comp_dir
= NULL
;
3534 struct die_info
*child_die
;
3535 bfd
*abfd
= objfile
->obfd
;
3536 struct line_header
*line_header
= 0;
3539 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3541 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3543 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3544 from finish_block. */
3545 if (lowpc
== ((CORE_ADDR
) -1))
3550 /* Find the filename. Do not use dwarf2_name here, since the filename
3551 is not a source language identifier. */
3552 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3555 name
= DW_STRING (attr
);
3558 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3560 comp_dir
= DW_STRING (attr
);
3561 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3563 comp_dir
= ldirname (name
);
3564 if (comp_dir
!= NULL
)
3565 make_cleanup (xfree
, comp_dir
);
3567 if (comp_dir
!= NULL
)
3569 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3570 directory, get rid of it. */
3571 char *cp
= strchr (comp_dir
, ':');
3573 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3580 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3583 set_cu_language (DW_UNSND (attr
), cu
);
3586 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3588 cu
->producer
= DW_STRING (attr
);
3590 /* We assume that we're processing GCC output. */
3591 processing_gcc_compilation
= 2;
3593 processing_has_namespace_info
= 0;
3595 start_symtab (name
, comp_dir
, lowpc
);
3596 record_debugformat ("DWARF 2");
3597 record_producer (cu
->producer
);
3599 initialize_cu_func_list (cu
);
3601 /* Decode line number information if present. We do this before
3602 processing child DIEs, so that the line header table is available
3603 for DW_AT_decl_file. */
3604 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3607 unsigned int line_offset
= DW_UNSND (attr
);
3608 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3611 cu
->line_header
= line_header
;
3612 make_cleanup (free_cu_line_header
, cu
);
3613 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3617 /* Process all dies in compilation unit. */
3618 if (die
->child
!= NULL
)
3620 child_die
= die
->child
;
3621 while (child_die
&& child_die
->tag
)
3623 process_die (child_die
, cu
);
3624 child_die
= sibling_die (child_die
);
3628 /* Decode macro information, if present. Dwarf 2 macro information
3629 refers to information in the line number info statement program
3630 header, so we can only read it if we've read the header
3632 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3633 if (attr
&& line_header
)
3635 unsigned int macro_offset
= DW_UNSND (attr
);
3637 dwarf_decode_macros (line_header
, macro_offset
,
3638 comp_dir
, abfd
, cu
);
3640 do_cleanups (back_to
);
3643 /* For TUs we want to skip the first top level sibling if it's not the
3644 actual type being defined by this TU. In this case the first top
3645 level sibling is there to provide context only. */
3648 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3650 struct objfile
*objfile
= cu
->objfile
;
3651 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3653 struct attribute
*attr
;
3655 char *comp_dir
= NULL
;
3656 struct die_info
*child_die
;
3657 bfd
*abfd
= objfile
->obfd
;
3659 /* start_symtab needs a low pc, but we don't really have one.
3660 Do what read_file_scope would do in the absence of such info. */
3661 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3663 /* Find the filename. Do not use dwarf2_name here, since the filename
3664 is not a source language identifier. */
3665 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3667 name
= DW_STRING (attr
);
3669 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3671 comp_dir
= DW_STRING (attr
);
3672 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3674 comp_dir
= ldirname (name
);
3675 if (comp_dir
!= NULL
)
3676 make_cleanup (xfree
, comp_dir
);
3682 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3684 set_cu_language (DW_UNSND (attr
), cu
);
3686 /* This isn't technically needed today. It is done for symmetry
3687 with read_file_scope. */
3688 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3690 cu
->producer
= DW_STRING (attr
);
3692 /* We assume that we're processing GCC output. */
3693 processing_gcc_compilation
= 2;
3695 processing_has_namespace_info
= 0;
3697 start_symtab (name
, comp_dir
, lowpc
);
3698 record_debugformat ("DWARF 2");
3699 record_producer (cu
->producer
);
3701 /* Process the dies in the type unit. */
3702 if (die
->child
== NULL
)
3704 dump_die_for_error (die
);
3705 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3706 bfd_get_filename (abfd
));
3709 child_die
= die
->child
;
3711 while (child_die
&& child_die
->tag
)
3713 process_die (child_die
, cu
);
3715 child_die
= sibling_die (child_die
);
3718 do_cleanups (back_to
);
3722 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3723 struct dwarf2_cu
*cu
)
3725 struct function_range
*thisfn
;
3727 thisfn
= (struct function_range
*)
3728 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3729 thisfn
->name
= name
;
3730 thisfn
->lowpc
= lowpc
;
3731 thisfn
->highpc
= highpc
;
3732 thisfn
->seen_line
= 0;
3733 thisfn
->next
= NULL
;
3735 if (cu
->last_fn
== NULL
)
3736 cu
->first_fn
= thisfn
;
3738 cu
->last_fn
->next
= thisfn
;
3740 cu
->last_fn
= thisfn
;
3743 /* qsort helper for inherit_abstract_dies. */
3746 unsigned_int_compar (const void *ap
, const void *bp
)
3748 unsigned int a
= *(unsigned int *) ap
;
3749 unsigned int b
= *(unsigned int *) bp
;
3751 return (a
> b
) - (b
> a
);
3754 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3755 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3756 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3759 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3761 struct die_info
*child_die
;
3762 unsigned die_children_count
;
3763 /* CU offsets which were referenced by children of the current DIE. */
3765 unsigned *offsets_end
, *offsetp
;
3766 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3767 struct die_info
*origin_die
;
3768 /* Iterator of the ORIGIN_DIE children. */
3769 struct die_info
*origin_child_die
;
3770 struct cleanup
*cleanups
;
3771 struct attribute
*attr
;
3773 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3777 origin_die
= follow_die_ref (die
, attr
, &cu
);
3778 if (die
->tag
!= origin_die
->tag
3779 && !(die
->tag
== DW_TAG_inlined_subroutine
3780 && origin_die
->tag
== DW_TAG_subprogram
))
3781 complaint (&symfile_complaints
,
3782 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3783 die
->offset
, origin_die
->offset
);
3785 child_die
= die
->child
;
3786 die_children_count
= 0;
3787 while (child_die
&& child_die
->tag
)
3789 child_die
= sibling_die (child_die
);
3790 die_children_count
++;
3792 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3793 cleanups
= make_cleanup (xfree
, offsets
);
3795 offsets_end
= offsets
;
3796 child_die
= die
->child
;
3797 while (child_die
&& child_die
->tag
)
3799 /* For each CHILD_DIE, find the corresponding child of
3800 ORIGIN_DIE. If there is more than one layer of
3801 DW_AT_abstract_origin, follow them all; there shouldn't be,
3802 but GCC versions at least through 4.4 generate this (GCC PR
3804 struct die_info
*child_origin_die
= child_die
;
3808 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3811 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3814 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3815 counterpart may exist. */
3816 if (child_origin_die
!= child_die
)
3818 if (child_die
->tag
!= child_origin_die
->tag
3819 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3820 && child_origin_die
->tag
== DW_TAG_subprogram
))
3821 complaint (&symfile_complaints
,
3822 _("Child DIE 0x%x and its abstract origin 0x%x have "
3823 "different tags"), child_die
->offset
,
3824 child_origin_die
->offset
);
3825 if (child_origin_die
->parent
!= origin_die
)
3826 complaint (&symfile_complaints
,
3827 _("Child DIE 0x%x and its abstract origin 0x%x have "
3828 "different parents"), child_die
->offset
,
3829 child_origin_die
->offset
);
3831 *offsets_end
++ = child_origin_die
->offset
;
3833 child_die
= sibling_die (child_die
);
3835 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3836 unsigned_int_compar
);
3837 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3838 if (offsetp
[-1] == *offsetp
)
3839 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3840 "to DIE 0x%x as their abstract origin"),
3841 die
->offset
, *offsetp
);
3844 origin_child_die
= origin_die
->child
;
3845 while (origin_child_die
&& origin_child_die
->tag
)
3847 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3848 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3850 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3852 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3853 process_die (origin_child_die
, cu
);
3855 origin_child_die
= sibling_die (origin_child_die
);
3858 do_cleanups (cleanups
);
3862 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3864 struct objfile
*objfile
= cu
->objfile
;
3865 struct context_stack
*new;
3868 struct die_info
*child_die
;
3869 struct attribute
*attr
, *call_line
, *call_file
;
3872 struct block
*block
;
3873 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3877 /* If we do not have call site information, we can't show the
3878 caller of this inlined function. That's too confusing, so
3879 only use the scope for local variables. */
3880 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3881 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3882 if (call_line
== NULL
|| call_file
== NULL
)
3884 read_lexical_block_scope (die
, cu
);
3889 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3891 name
= dwarf2_name (die
, cu
);
3893 /* Ignore functions with missing or empty names. These are actually
3894 illegal according to the DWARF standard. */
3897 complaint (&symfile_complaints
,
3898 _("missing name for subprogram DIE at %d"), die
->offset
);
3902 /* Ignore functions with missing or invalid low and high pc attributes. */
3903 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3905 complaint (&symfile_complaints
,
3906 _("cannot get low and high bounds for subprogram DIE at %d"),
3914 /* Record the function range for dwarf_decode_lines. */
3915 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3917 new = push_context (0, lowpc
);
3918 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3920 /* If there is a location expression for DW_AT_frame_base, record
3922 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3924 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3925 expression is being recorded directly in the function's symbol
3926 and not in a separate frame-base object. I guess this hack is
3927 to avoid adding some sort of frame-base adjunct/annex to the
3928 function's symbol :-(. The problem with doing this is that it
3929 results in a function symbol with a location expression that
3930 has nothing to do with the location of the function, ouch! The
3931 relationship should be: a function's symbol has-a frame base; a
3932 frame-base has-a location expression. */
3933 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3935 cu
->list_in_scope
= &local_symbols
;
3937 if (die
->child
!= NULL
)
3939 child_die
= die
->child
;
3940 while (child_die
&& child_die
->tag
)
3942 process_die (child_die
, cu
);
3943 child_die
= sibling_die (child_die
);
3947 inherit_abstract_dies (die
, cu
);
3949 /* If we have a DW_AT_specification, we might need to import using
3950 directives from the context of the specification DIE. See the
3951 comment in determine_prefix. */
3952 if (cu
->language
== language_cplus
3953 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3955 struct dwarf2_cu
*spec_cu
= cu
;
3956 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3960 child_die
= spec_die
->child
;
3961 while (child_die
&& child_die
->tag
)
3963 if (child_die
->tag
== DW_TAG_imported_module
)
3964 process_die (child_die
, spec_cu
);
3965 child_die
= sibling_die (child_die
);
3968 /* In some cases, GCC generates specification DIEs that
3969 themselves contain DW_AT_specification attributes. */
3970 spec_die
= die_specification (spec_die
, &spec_cu
);
3974 new = pop_context ();
3975 /* Make a block for the local symbols within. */
3976 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3977 lowpc
, highpc
, objfile
);
3979 /* For C++, set the block's scope. */
3980 if (cu
->language
== language_cplus
)
3981 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3982 determine_prefix (die
, cu
),
3983 processing_has_namespace_info
);
3985 /* If we have address ranges, record them. */
3986 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3988 /* In C++, we can have functions nested inside functions (e.g., when
3989 a function declares a class that has methods). This means that
3990 when we finish processing a function scope, we may need to go
3991 back to building a containing block's symbol lists. */
3992 local_symbols
= new->locals
;
3993 param_symbols
= new->params
;
3994 using_directives
= new->using_directives
;
3996 /* If we've finished processing a top-level function, subsequent
3997 symbols go in the file symbol list. */
3998 if (outermost_context_p ())
3999 cu
->list_in_scope
= &file_symbols
;
4002 /* Process all the DIES contained within a lexical block scope. Start
4003 a new scope, process the dies, and then close the scope. */
4006 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4008 struct objfile
*objfile
= cu
->objfile
;
4009 struct context_stack
*new;
4010 CORE_ADDR lowpc
, highpc
;
4011 struct die_info
*child_die
;
4014 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4016 /* Ignore blocks with missing or invalid low and high pc attributes. */
4017 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4018 as multiple lexical blocks? Handling children in a sane way would
4019 be nasty. Might be easier to properly extend generic blocks to
4021 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4026 push_context (0, lowpc
);
4027 if (die
->child
!= NULL
)
4029 child_die
= die
->child
;
4030 while (child_die
&& child_die
->tag
)
4032 process_die (child_die
, cu
);
4033 child_die
= sibling_die (child_die
);
4036 new = pop_context ();
4038 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4041 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4044 /* Note that recording ranges after traversing children, as we
4045 do here, means that recording a parent's ranges entails
4046 walking across all its children's ranges as they appear in
4047 the address map, which is quadratic behavior.
4049 It would be nicer to record the parent's ranges before
4050 traversing its children, simply overriding whatever you find
4051 there. But since we don't even decide whether to create a
4052 block until after we've traversed its children, that's hard
4054 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4056 local_symbols
= new->locals
;
4057 using_directives
= new->using_directives
;
4060 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4061 Return 1 if the attributes are present and valid, otherwise, return 0.
4062 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4065 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4066 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4067 struct partial_symtab
*ranges_pst
)
4069 struct objfile
*objfile
= cu
->objfile
;
4070 struct comp_unit_head
*cu_header
= &cu
->header
;
4071 bfd
*obfd
= objfile
->obfd
;
4072 unsigned int addr_size
= cu_header
->addr_size
;
4073 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4074 /* Base address selection entry. */
4085 found_base
= cu
->base_known
;
4086 base
= cu
->base_address
;
4088 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4089 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4091 complaint (&symfile_complaints
,
4092 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4096 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4098 /* Read in the largest possible address. */
4099 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4100 if ((marker
& mask
) == mask
)
4102 /* If we found the largest possible address, then
4103 read the base address. */
4104 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4105 buffer
+= 2 * addr_size
;
4106 offset
+= 2 * addr_size
;
4112 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4116 CORE_ADDR range_beginning
, range_end
;
4118 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4119 buffer
+= addr_size
;
4120 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4121 buffer
+= addr_size
;
4122 offset
+= 2 * addr_size
;
4124 /* An end of list marker is a pair of zero addresses. */
4125 if (range_beginning
== 0 && range_end
== 0)
4126 /* Found the end of list entry. */
4129 /* Each base address selection entry is a pair of 2 values.
4130 The first is the largest possible address, the second is
4131 the base address. Check for a base address here. */
4132 if ((range_beginning
& mask
) == mask
)
4134 /* If we found the largest possible address, then
4135 read the base address. */
4136 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4143 /* We have no valid base address for the ranges
4145 complaint (&symfile_complaints
,
4146 _("Invalid .debug_ranges data (no base address)"));
4150 range_beginning
+= base
;
4153 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4154 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4155 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4158 /* FIXME: This is recording everything as a low-high
4159 segment of consecutive addresses. We should have a
4160 data structure for discontiguous block ranges
4164 low
= range_beginning
;
4170 if (range_beginning
< low
)
4171 low
= range_beginning
;
4172 if (range_end
> high
)
4178 /* If the first entry is an end-of-list marker, the range
4179 describes an empty scope, i.e. no instructions. */
4185 *high_return
= high
;
4189 /* Get low and high pc attributes from a die. Return 1 if the attributes
4190 are present and valid, otherwise, return 0. Return -1 if the range is
4191 discontinuous, i.e. derived from DW_AT_ranges information. */
4193 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4194 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4195 struct partial_symtab
*pst
)
4197 struct attribute
*attr
;
4202 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4205 high
= DW_ADDR (attr
);
4206 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4208 low
= DW_ADDR (attr
);
4210 /* Found high w/o low attribute. */
4213 /* Found consecutive range of addresses. */
4218 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4221 /* Value of the DW_AT_ranges attribute is the offset in the
4222 .debug_ranges section. */
4223 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4225 /* Found discontinuous range of addresses. */
4233 /* When using the GNU linker, .gnu.linkonce. sections are used to
4234 eliminate duplicate copies of functions and vtables and such.
4235 The linker will arbitrarily choose one and discard the others.
4236 The AT_*_pc values for such functions refer to local labels in
4237 these sections. If the section from that file was discarded, the
4238 labels are not in the output, so the relocs get a value of 0.
4239 If this is a discarded function, mark the pc bounds as invalid,
4240 so that GDB will ignore it. */
4241 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4249 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4250 its low and high PC addresses. Do nothing if these addresses could not
4251 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4252 and HIGHPC to the high address if greater than HIGHPC. */
4255 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4256 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4257 struct dwarf2_cu
*cu
)
4259 CORE_ADDR low
, high
;
4260 struct die_info
*child
= die
->child
;
4262 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4264 *lowpc
= min (*lowpc
, low
);
4265 *highpc
= max (*highpc
, high
);
4268 /* If the language does not allow nested subprograms (either inside
4269 subprograms or lexical blocks), we're done. */
4270 if (cu
->language
!= language_ada
)
4273 /* Check all the children of the given DIE. If it contains nested
4274 subprograms, then check their pc bounds. Likewise, we need to
4275 check lexical blocks as well, as they may also contain subprogram
4277 while (child
&& child
->tag
)
4279 if (child
->tag
== DW_TAG_subprogram
4280 || child
->tag
== DW_TAG_lexical_block
)
4281 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4282 child
= sibling_die (child
);
4286 /* Get the low and high pc's represented by the scope DIE, and store
4287 them in *LOWPC and *HIGHPC. If the correct values can't be
4288 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4291 get_scope_pc_bounds (struct die_info
*die
,
4292 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4293 struct dwarf2_cu
*cu
)
4295 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4296 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4297 CORE_ADDR current_low
, current_high
;
4299 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4301 best_low
= current_low
;
4302 best_high
= current_high
;
4306 struct die_info
*child
= die
->child
;
4308 while (child
&& child
->tag
)
4310 switch (child
->tag
) {
4311 case DW_TAG_subprogram
:
4312 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4314 case DW_TAG_namespace
:
4315 /* FIXME: carlton/2004-01-16: Should we do this for
4316 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4317 that current GCC's always emit the DIEs corresponding
4318 to definitions of methods of classes as children of a
4319 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4320 the DIEs giving the declarations, which could be
4321 anywhere). But I don't see any reason why the
4322 standards says that they have to be there. */
4323 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4325 if (current_low
!= ((CORE_ADDR
) -1))
4327 best_low
= min (best_low
, current_low
);
4328 best_high
= max (best_high
, current_high
);
4336 child
= sibling_die (child
);
4341 *highpc
= best_high
;
4344 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4347 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4348 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4350 struct attribute
*attr
;
4352 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4355 CORE_ADDR high
= DW_ADDR (attr
);
4357 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4360 CORE_ADDR low
= DW_ADDR (attr
);
4362 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4366 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4369 bfd
*obfd
= cu
->objfile
->obfd
;
4371 /* The value of the DW_AT_ranges attribute is the offset of the
4372 address range list in the .debug_ranges section. */
4373 unsigned long offset
= DW_UNSND (attr
);
4374 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4376 /* For some target architectures, but not others, the
4377 read_address function sign-extends the addresses it returns.
4378 To recognize base address selection entries, we need a
4380 unsigned int addr_size
= cu
->header
.addr_size
;
4381 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4383 /* The base address, to which the next pair is relative. Note
4384 that this 'base' is a DWARF concept: most entries in a range
4385 list are relative, to reduce the number of relocs against the
4386 debugging information. This is separate from this function's
4387 'baseaddr' argument, which GDB uses to relocate debugging
4388 information from a shared library based on the address at
4389 which the library was loaded. */
4390 CORE_ADDR base
= cu
->base_address
;
4391 int base_known
= cu
->base_known
;
4393 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4394 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4396 complaint (&symfile_complaints
,
4397 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4404 unsigned int bytes_read
;
4405 CORE_ADDR start
, end
;
4407 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4408 buffer
+= bytes_read
;
4409 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4410 buffer
+= bytes_read
;
4412 /* Did we find the end of the range list? */
4413 if (start
== 0 && end
== 0)
4416 /* Did we find a base address selection entry? */
4417 else if ((start
& base_select_mask
) == base_select_mask
)
4423 /* We found an ordinary address range. */
4428 complaint (&symfile_complaints
,
4429 _("Invalid .debug_ranges data (no base address)"));
4433 record_block_range (block
,
4434 baseaddr
+ base
+ start
,
4435 baseaddr
+ base
+ end
- 1);
4441 /* Add an aggregate field to the field list. */
4444 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4445 struct dwarf2_cu
*cu
)
4447 struct objfile
*objfile
= cu
->objfile
;
4448 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4449 struct nextfield
*new_field
;
4450 struct attribute
*attr
;
4452 char *fieldname
= "";
4454 /* Allocate a new field list entry and link it in. */
4455 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4456 make_cleanup (xfree
, new_field
);
4457 memset (new_field
, 0, sizeof (struct nextfield
));
4459 if (die
->tag
== DW_TAG_inheritance
)
4461 new_field
->next
= fip
->baseclasses
;
4462 fip
->baseclasses
= new_field
;
4466 new_field
->next
= fip
->fields
;
4467 fip
->fields
= new_field
;
4471 /* Handle accessibility and virtuality of field.
4472 The default accessibility for members is public, the default
4473 accessibility for inheritance is private. */
4474 if (die
->tag
!= DW_TAG_inheritance
)
4475 new_field
->accessibility
= DW_ACCESS_public
;
4477 new_field
->accessibility
= DW_ACCESS_private
;
4478 new_field
->virtuality
= DW_VIRTUALITY_none
;
4480 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4482 new_field
->accessibility
= DW_UNSND (attr
);
4483 if (new_field
->accessibility
!= DW_ACCESS_public
)
4484 fip
->non_public_fields
= 1;
4485 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4487 new_field
->virtuality
= DW_UNSND (attr
);
4489 fp
= &new_field
->field
;
4491 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4493 /* Data member other than a C++ static data member. */
4495 /* Get type of field. */
4496 fp
->type
= die_type (die
, cu
);
4498 SET_FIELD_BITPOS (*fp
, 0);
4500 /* Get bit size of field (zero if none). */
4501 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4504 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4508 FIELD_BITSIZE (*fp
) = 0;
4511 /* Get bit offset of field. */
4512 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4515 int byte_offset
= 0;
4517 if (attr_form_is_section_offset (attr
))
4518 dwarf2_complex_location_expr_complaint ();
4519 else if (attr_form_is_constant (attr
))
4520 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4521 else if (attr_form_is_block (attr
))
4522 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4524 dwarf2_complex_location_expr_complaint ();
4526 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4528 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4531 if (gdbarch_bits_big_endian (gdbarch
))
4533 /* For big endian bits, the DW_AT_bit_offset gives the
4534 additional bit offset from the MSB of the containing
4535 anonymous object to the MSB of the field. We don't
4536 have to do anything special since we don't need to
4537 know the size of the anonymous object. */
4538 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4542 /* For little endian bits, compute the bit offset to the
4543 MSB of the anonymous object, subtract off the number of
4544 bits from the MSB of the field to the MSB of the
4545 object, and then subtract off the number of bits of
4546 the field itself. The result is the bit offset of
4547 the LSB of the field. */
4549 int bit_offset
= DW_UNSND (attr
);
4551 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4554 /* The size of the anonymous object containing
4555 the bit field is explicit, so use the
4556 indicated size (in bytes). */
4557 anonymous_size
= DW_UNSND (attr
);
4561 /* The size of the anonymous object containing
4562 the bit field must be inferred from the type
4563 attribute of the data member containing the
4565 anonymous_size
= TYPE_LENGTH (fp
->type
);
4567 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4568 - bit_offset
- FIELD_BITSIZE (*fp
);
4572 /* Get name of field. */
4573 fieldname
= dwarf2_name (die
, cu
);
4574 if (fieldname
== NULL
)
4577 /* The name is already allocated along with this objfile, so we don't
4578 need to duplicate it for the type. */
4579 fp
->name
= fieldname
;
4581 /* Change accessibility for artificial fields (e.g. virtual table
4582 pointer or virtual base class pointer) to private. */
4583 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4585 FIELD_ARTIFICIAL (*fp
) = 1;
4586 new_field
->accessibility
= DW_ACCESS_private
;
4587 fip
->non_public_fields
= 1;
4590 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4592 /* C++ static member. */
4594 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4595 is a declaration, but all versions of G++ as of this writing
4596 (so through at least 3.2.1) incorrectly generate
4597 DW_TAG_variable tags. */
4601 /* Get name of field. */
4602 fieldname
= dwarf2_name (die
, cu
);
4603 if (fieldname
== NULL
)
4606 /* Get physical name. */
4607 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4609 /* The name is already allocated along with this objfile, so we don't
4610 need to duplicate it for the type. */
4611 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4612 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4613 FIELD_NAME (*fp
) = fieldname
;
4615 else if (die
->tag
== DW_TAG_inheritance
)
4617 /* C++ base class field. */
4618 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4621 int byte_offset
= 0;
4623 if (attr_form_is_section_offset (attr
))
4624 dwarf2_complex_location_expr_complaint ();
4625 else if (attr_form_is_constant (attr
))
4626 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4627 else if (attr_form_is_block (attr
))
4628 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4630 dwarf2_complex_location_expr_complaint ();
4632 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4634 FIELD_BITSIZE (*fp
) = 0;
4635 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4636 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4637 fip
->nbaseclasses
++;
4641 /* Create the vector of fields, and attach it to the type. */
4644 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4645 struct dwarf2_cu
*cu
)
4647 int nfields
= fip
->nfields
;
4649 /* Record the field count, allocate space for the array of fields,
4650 and create blank accessibility bitfields if necessary. */
4651 TYPE_NFIELDS (type
) = nfields
;
4652 TYPE_FIELDS (type
) = (struct field
*)
4653 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4654 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4656 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4658 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4660 TYPE_FIELD_PRIVATE_BITS (type
) =
4661 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4662 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4664 TYPE_FIELD_PROTECTED_BITS (type
) =
4665 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4666 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4668 TYPE_FIELD_IGNORE_BITS (type
) =
4669 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4670 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4673 /* If the type has baseclasses, allocate and clear a bit vector for
4674 TYPE_FIELD_VIRTUAL_BITS. */
4675 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4677 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4678 unsigned char *pointer
;
4680 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4681 pointer
= TYPE_ALLOC (type
, num_bytes
);
4682 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4683 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4684 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4687 /* Copy the saved-up fields into the field vector. Start from the head
4688 of the list, adding to the tail of the field array, so that they end
4689 up in the same order in the array in which they were added to the list. */
4690 while (nfields
-- > 0)
4692 struct nextfield
*fieldp
;
4696 fieldp
= fip
->fields
;
4697 fip
->fields
= fieldp
->next
;
4701 fieldp
= fip
->baseclasses
;
4702 fip
->baseclasses
= fieldp
->next
;
4705 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4706 switch (fieldp
->accessibility
)
4708 case DW_ACCESS_private
:
4709 if (cu
->language
!= language_ada
)
4710 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4713 case DW_ACCESS_protected
:
4714 if (cu
->language
!= language_ada
)
4715 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4718 case DW_ACCESS_public
:
4722 /* Unknown accessibility. Complain and treat it as public. */
4724 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4725 fieldp
->accessibility
);
4729 if (nfields
< fip
->nbaseclasses
)
4731 switch (fieldp
->virtuality
)
4733 case DW_VIRTUALITY_virtual
:
4734 case DW_VIRTUALITY_pure_virtual
:
4735 if (cu
->language
== language_ada
)
4736 error ("unexpected virtuality in component of Ada type");
4737 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4744 /* Add a member function to the proper fieldlist. */
4747 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4748 struct type
*type
, struct dwarf2_cu
*cu
)
4750 struct objfile
*objfile
= cu
->objfile
;
4751 struct attribute
*attr
;
4752 struct fnfieldlist
*flp
;
4754 struct fn_field
*fnp
;
4757 struct nextfnfield
*new_fnfield
;
4758 struct type
*this_type
;
4760 if (cu
->language
== language_ada
)
4761 error ("unexpected member function in Ada type");
4763 /* Get name of member function. */
4764 fieldname
= dwarf2_name (die
, cu
);
4765 if (fieldname
== NULL
)
4768 /* Get the mangled name. */
4769 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4771 /* Look up member function name in fieldlist. */
4772 for (i
= 0; i
< fip
->nfnfields
; i
++)
4774 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4778 /* Create new list element if necessary. */
4779 if (i
< fip
->nfnfields
)
4780 flp
= &fip
->fnfieldlists
[i
];
4783 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4785 fip
->fnfieldlists
= (struct fnfieldlist
*)
4786 xrealloc (fip
->fnfieldlists
,
4787 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4788 * sizeof (struct fnfieldlist
));
4789 if (fip
->nfnfields
== 0)
4790 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4792 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4793 flp
->name
= fieldname
;
4799 /* Create a new member function field and chain it to the field list
4801 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4802 make_cleanup (xfree
, new_fnfield
);
4803 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4804 new_fnfield
->next
= flp
->head
;
4805 flp
->head
= new_fnfield
;
4808 /* Fill in the member function field info. */
4809 fnp
= &new_fnfield
->fnfield
;
4810 /* The name is already allocated along with this objfile, so we don't
4811 need to duplicate it for the type. */
4812 fnp
->physname
= physname
? physname
: "";
4813 fnp
->type
= alloc_type (objfile
);
4814 this_type
= read_type_die (die
, cu
);
4815 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4817 int nparams
= TYPE_NFIELDS (this_type
);
4819 /* TYPE is the domain of this method, and THIS_TYPE is the type
4820 of the method itself (TYPE_CODE_METHOD). */
4821 smash_to_method_type (fnp
->type
, type
,
4822 TYPE_TARGET_TYPE (this_type
),
4823 TYPE_FIELDS (this_type
),
4824 TYPE_NFIELDS (this_type
),
4825 TYPE_VARARGS (this_type
));
4827 /* Handle static member functions.
4828 Dwarf2 has no clean way to discern C++ static and non-static
4829 member functions. G++ helps GDB by marking the first
4830 parameter for non-static member functions (which is the
4831 this pointer) as artificial. We obtain this information
4832 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4833 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4834 fnp
->voffset
= VOFFSET_STATIC
;
4837 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4840 /* Get fcontext from DW_AT_containing_type if present. */
4841 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4842 fnp
->fcontext
= die_containing_type (die
, cu
);
4844 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4845 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4847 /* Get accessibility. */
4848 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4851 switch (DW_UNSND (attr
))
4853 case DW_ACCESS_private
:
4854 fnp
->is_private
= 1;
4856 case DW_ACCESS_protected
:
4857 fnp
->is_protected
= 1;
4862 /* Check for artificial methods. */
4863 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4864 if (attr
&& DW_UNSND (attr
) != 0)
4865 fnp
->is_artificial
= 1;
4867 /* Get index in virtual function table if it is a virtual member
4868 function. For GCC, this is an offset in the appropriate
4869 virtual table, as specified by DW_AT_containing_type. For
4870 everyone else, it is an expression to be evaluated relative
4871 to the object address. */
4873 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4874 if (attr
&& fnp
->fcontext
)
4876 /* Support the .debug_loc offsets */
4877 if (attr_form_is_block (attr
))
4879 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4881 else if (attr_form_is_section_offset (attr
))
4883 dwarf2_complex_location_expr_complaint ();
4887 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4893 /* We only support trivial expressions here. This hack will work
4894 for v3 classes, which always start with the vtable pointer. */
4895 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4896 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4898 struct dwarf_block blk
;
4900 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4901 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4902 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4903 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4904 dwarf2_complex_location_expr_complaint ();
4906 fnp
->voffset
/= cu
->header
.addr_size
;
4908 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4911 dwarf2_complex_location_expr_complaint ();
4915 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4916 if (attr
&& DW_UNSND (attr
))
4918 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4919 complaint (&symfile_complaints
,
4920 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4921 fieldname
, die
->offset
);
4922 TYPE_CPLUS_DYNAMIC (type
) = 1;
4927 /* Create the vector of member function fields, and attach it to the type. */
4930 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4931 struct dwarf2_cu
*cu
)
4933 struct fnfieldlist
*flp
;
4934 int total_length
= 0;
4937 if (cu
->language
== language_ada
)
4938 error ("unexpected member functions in Ada type");
4940 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4941 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4942 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4944 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4946 struct nextfnfield
*nfp
= flp
->head
;
4947 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4950 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4951 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4952 fn_flp
->fn_fields
= (struct fn_field
*)
4953 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4954 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4955 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4957 total_length
+= flp
->length
;
4960 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4961 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4964 /* Returns non-zero if NAME is the name of a vtable member in CU's
4965 language, zero otherwise. */
4967 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4969 static const char vptr
[] = "_vptr";
4970 static const char vtable
[] = "vtable";
4972 /* Look for the C++ and Java forms of the vtable. */
4973 if ((cu
->language
== language_java
4974 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4975 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4976 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4982 /* GCC outputs unnamed structures that are really pointers to member
4983 functions, with the ABI-specified layout. If TYPE describes
4984 such a structure, smash it into a member function type.
4986 GCC shouldn't do this; it should just output pointer to member DIEs.
4987 This is GCC PR debug/28767. */
4990 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
4992 struct type
*pfn_type
, *domain_type
, *new_type
;
4994 /* Check for a structure with no name and two children. */
4995 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
4998 /* Check for __pfn and __delta members. */
4999 if (TYPE_FIELD_NAME (type
, 0) == NULL
5000 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
5001 || TYPE_FIELD_NAME (type
, 1) == NULL
5002 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5005 /* Find the type of the method. */
5006 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5007 if (pfn_type
== NULL
5008 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5009 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5012 /* Look for the "this" argument. */
5013 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5014 if (TYPE_NFIELDS (pfn_type
) == 0
5015 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5016 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5019 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5020 new_type
= alloc_type (objfile
);
5021 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5022 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5023 TYPE_VARARGS (pfn_type
));
5024 smash_to_methodptr_type (type
, new_type
);
5027 /* Called when we find the DIE that starts a structure or union scope
5028 (definition) to process all dies that define the members of the
5031 NOTE: we need to call struct_type regardless of whether or not the
5032 DIE has an at_name attribute, since it might be an anonymous
5033 structure or union. This gets the type entered into our set of
5036 However, if the structure is incomplete (an opaque struct/union)
5037 then suppress creating a symbol table entry for it since gdb only
5038 wants to find the one with the complete definition. Note that if
5039 it is complete, we just call new_symbol, which does it's own
5040 checking about whether the struct/union is anonymous or not (and
5041 suppresses creating a symbol table entry itself). */
5043 static struct type
*
5044 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5046 struct objfile
*objfile
= cu
->objfile
;
5048 struct attribute
*attr
;
5050 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5052 /* If the definition of this type lives in .debug_types, read that type.
5053 Don't follow DW_AT_specification though, that will take us back up
5054 the chain and we want to go down. */
5055 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5058 struct dwarf2_cu
*type_cu
= cu
;
5059 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5061 /* We could just recurse on read_structure_type, but we need to call
5062 get_die_type to ensure only one type for this DIE is created.
5063 This is important, for example, because for c++ classes we need
5064 TYPE_NAME set which is only done by new_symbol. Blech. */
5065 type
= read_type_die (type_die
, type_cu
);
5066 return set_die_type (die
, type
, cu
);
5069 type
= alloc_type (objfile
);
5070 INIT_CPLUS_SPECIFIC (type
);
5072 name
= dwarf2_name (die
, cu
);
5075 if (cu
->language
== language_cplus
5076 || cu
->language
== language_java
)
5078 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5079 if (die
->tag
== DW_TAG_structure_type
5080 || die
->tag
== DW_TAG_class_type
)
5081 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5085 /* The name is already allocated along with this objfile, so
5086 we don't need to duplicate it for the type. */
5087 TYPE_TAG_NAME (type
) = (char *) name
;
5088 if (die
->tag
== DW_TAG_class_type
)
5089 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5093 if (die
->tag
== DW_TAG_structure_type
)
5095 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5097 else if (die
->tag
== DW_TAG_union_type
)
5099 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5103 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5106 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5107 TYPE_DECLARED_CLASS (type
) = 1;
5109 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5112 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5116 TYPE_LENGTH (type
) = 0;
5119 TYPE_STUB_SUPPORTED (type
) = 1;
5120 if (die_is_declaration (die
, cu
))
5121 TYPE_STUB (type
) = 1;
5122 else if (attr
== NULL
&& die
->child
== NULL
5123 && producer_is_realview (cu
->producer
))
5124 /* RealView does not output the required DW_AT_declaration
5125 on incomplete types. */
5126 TYPE_STUB (type
) = 1;
5128 set_descriptive_type (type
, die
, cu
);
5130 /* We need to add the type field to the die immediately so we don't
5131 infinitely recurse when dealing with pointers to the structure
5132 type within the structure itself. */
5133 set_die_type (die
, type
, cu
);
5135 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5137 struct field_info fi
;
5138 struct die_info
*child_die
;
5140 memset (&fi
, 0, sizeof (struct field_info
));
5142 child_die
= die
->child
;
5144 while (child_die
&& child_die
->tag
)
5146 if (child_die
->tag
== DW_TAG_member
5147 || child_die
->tag
== DW_TAG_variable
)
5149 /* NOTE: carlton/2002-11-05: A C++ static data member
5150 should be a DW_TAG_member that is a declaration, but
5151 all versions of G++ as of this writing (so through at
5152 least 3.2.1) incorrectly generate DW_TAG_variable
5153 tags for them instead. */
5154 dwarf2_add_field (&fi
, child_die
, cu
);
5156 else if (child_die
->tag
== DW_TAG_subprogram
)
5158 /* C++ member function. */
5159 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5161 else if (child_die
->tag
== DW_TAG_inheritance
)
5163 /* C++ base class field. */
5164 dwarf2_add_field (&fi
, child_die
, cu
);
5166 child_die
= sibling_die (child_die
);
5169 /* Attach fields and member functions to the type. */
5171 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5174 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5176 /* Get the type which refers to the base class (possibly this
5177 class itself) which contains the vtable pointer for the current
5178 class from the DW_AT_containing_type attribute. This use of
5179 DW_AT_containing_type is a GNU extension. */
5181 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5183 struct type
*t
= die_containing_type (die
, cu
);
5185 TYPE_VPTR_BASETYPE (type
) = t
;
5190 /* Our own class provides vtbl ptr. */
5191 for (i
= TYPE_NFIELDS (t
) - 1;
5192 i
>= TYPE_N_BASECLASSES (t
);
5195 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5197 if (is_vtable_name (fieldname
, cu
))
5199 TYPE_VPTR_FIELDNO (type
) = i
;
5204 /* Complain if virtual function table field not found. */
5205 if (i
< TYPE_N_BASECLASSES (t
))
5206 complaint (&symfile_complaints
,
5207 _("virtual function table pointer not found when defining class '%s'"),
5208 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5213 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5216 else if (cu
->producer
5217 && strncmp (cu
->producer
,
5218 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5220 /* The IBM XLC compiler does not provide direct indication
5221 of the containing type, but the vtable pointer is
5222 always named __vfp. */
5226 for (i
= TYPE_NFIELDS (type
) - 1;
5227 i
>= TYPE_N_BASECLASSES (type
);
5230 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5232 TYPE_VPTR_FIELDNO (type
) = i
;
5233 TYPE_VPTR_BASETYPE (type
) = type
;
5241 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5243 do_cleanups (back_to
);
5248 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5250 struct die_info
*child_die
= die
->child
;
5251 struct type
*this_type
;
5253 this_type
= get_die_type (die
, cu
);
5254 if (this_type
== NULL
)
5255 this_type
= read_structure_type (die
, cu
);
5257 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5258 snapshots) has been known to create a die giving a declaration
5259 for a class that has, as a child, a die giving a definition for a
5260 nested class. So we have to process our children even if the
5261 current die is a declaration. Normally, of course, a declaration
5262 won't have any children at all. */
5264 while (child_die
!= NULL
&& child_die
->tag
)
5266 if (child_die
->tag
== DW_TAG_member
5267 || child_die
->tag
== DW_TAG_variable
5268 || child_die
->tag
== DW_TAG_inheritance
)
5273 process_die (child_die
, cu
);
5275 child_die
= sibling_die (child_die
);
5278 /* Do not consider external references. According to the DWARF standard,
5279 these DIEs are identified by the fact that they have no byte_size
5280 attribute, and a declaration attribute. */
5281 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5282 || !die_is_declaration (die
, cu
))
5283 new_symbol (die
, this_type
, cu
);
5286 /* Given a DW_AT_enumeration_type die, set its type. We do not
5287 complete the type's fields yet, or create any symbols. */
5289 static struct type
*
5290 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5292 struct objfile
*objfile
= cu
->objfile
;
5294 struct attribute
*attr
;
5297 /* If the definition of this type lives in .debug_types, read that type.
5298 Don't follow DW_AT_specification though, that will take us back up
5299 the chain and we want to go down. */
5300 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5303 struct dwarf2_cu
*type_cu
= cu
;
5304 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5306 type
= read_type_die (type_die
, type_cu
);
5307 return set_die_type (die
, type
, cu
);
5310 type
= alloc_type (objfile
);
5312 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5313 name
= dwarf2_full_name (NULL
, die
, cu
);
5315 TYPE_TAG_NAME (type
) = (char *) name
;
5317 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5320 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5324 TYPE_LENGTH (type
) = 0;
5327 /* The enumeration DIE can be incomplete. In Ada, any type can be
5328 declared as private in the package spec, and then defined only
5329 inside the package body. Such types are known as Taft Amendment
5330 Types. When another package uses such a type, an incomplete DIE
5331 may be generated by the compiler. */
5332 if (die_is_declaration (die
, cu
))
5333 TYPE_STUB (type
) = 1;
5335 return set_die_type (die
, type
, cu
);
5338 /* Given a pointer to a die which begins an enumeration, process all
5339 the dies that define the members of the enumeration, and create the
5340 symbol for the enumeration type.
5342 NOTE: We reverse the order of the element list. */
5345 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5347 struct die_info
*child_die
;
5348 struct field
*fields
;
5351 int unsigned_enum
= 1;
5353 struct type
*this_type
;
5357 this_type
= get_die_type (die
, cu
);
5358 if (this_type
== NULL
)
5359 this_type
= read_enumeration_type (die
, cu
);
5360 if (die
->child
!= NULL
)
5362 child_die
= die
->child
;
5363 while (child_die
&& child_die
->tag
)
5365 if (child_die
->tag
!= DW_TAG_enumerator
)
5367 process_die (child_die
, cu
);
5371 name
= dwarf2_name (child_die
, cu
);
5374 sym
= new_symbol (child_die
, this_type
, cu
);
5375 if (SYMBOL_VALUE (sym
) < 0)
5378 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5380 fields
= (struct field
*)
5382 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5383 * sizeof (struct field
));
5386 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5387 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5388 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5389 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5395 child_die
= sibling_die (child_die
);
5400 TYPE_NFIELDS (this_type
) = num_fields
;
5401 TYPE_FIELDS (this_type
) = (struct field
*)
5402 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5403 memcpy (TYPE_FIELDS (this_type
), fields
,
5404 sizeof (struct field
) * num_fields
);
5408 TYPE_UNSIGNED (this_type
) = 1;
5411 new_symbol (die
, this_type
, cu
);
5414 /* Extract all information from a DW_TAG_array_type DIE and put it in
5415 the DIE's type field. For now, this only handles one dimensional
5418 static struct type
*
5419 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5421 struct objfile
*objfile
= cu
->objfile
;
5422 struct die_info
*child_die
;
5423 struct type
*type
= NULL
;
5424 struct type
*element_type
, *range_type
, *index_type
;
5425 struct type
**range_types
= NULL
;
5426 struct attribute
*attr
;
5428 struct cleanup
*back_to
;
5431 element_type
= die_type (die
, cu
);
5433 /* Irix 6.2 native cc creates array types without children for
5434 arrays with unspecified length. */
5435 if (die
->child
== NULL
)
5437 index_type
= objfile_type (objfile
)->builtin_int
;
5438 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5439 type
= create_array_type (NULL
, element_type
, range_type
);
5440 return set_die_type (die
, type
, cu
);
5443 back_to
= make_cleanup (null_cleanup
, NULL
);
5444 child_die
= die
->child
;
5445 while (child_die
&& child_die
->tag
)
5447 if (child_die
->tag
== DW_TAG_subrange_type
)
5449 struct type
*child_type
= read_type_die (child_die
, cu
);
5451 if (child_type
!= NULL
)
5453 /* The range type was succesfully read. Save it for
5454 the array type creation. */
5455 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5457 range_types
= (struct type
**)
5458 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5459 * sizeof (struct type
*));
5461 make_cleanup (free_current_contents
, &range_types
);
5463 range_types
[ndim
++] = child_type
;
5466 child_die
= sibling_die (child_die
);
5469 /* Dwarf2 dimensions are output from left to right, create the
5470 necessary array types in backwards order. */
5472 type
= element_type
;
5474 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5479 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5484 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5487 /* Understand Dwarf2 support for vector types (like they occur on
5488 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5489 array type. This is not part of the Dwarf2/3 standard yet, but a
5490 custom vendor extension. The main difference between a regular
5491 array and the vector variant is that vectors are passed by value
5493 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5495 make_vector_type (type
);
5497 name
= dwarf2_name (die
, cu
);
5499 TYPE_NAME (type
) = name
;
5501 set_descriptive_type (type
, die
, cu
);
5503 do_cleanups (back_to
);
5505 /* Install the type in the die. */
5506 return set_die_type (die
, type
, cu
);
5509 static enum dwarf_array_dim_ordering
5510 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5512 struct attribute
*attr
;
5514 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5516 if (attr
) return DW_SND (attr
);
5519 GNU F77 is a special case, as at 08/2004 array type info is the
5520 opposite order to the dwarf2 specification, but data is still
5521 laid out as per normal fortran.
5523 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5527 if (cu
->language
== language_fortran
5528 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5530 return DW_ORD_row_major
;
5533 switch (cu
->language_defn
->la_array_ordering
)
5535 case array_column_major
:
5536 return DW_ORD_col_major
;
5537 case array_row_major
:
5539 return DW_ORD_row_major
;
5543 /* Extract all information from a DW_TAG_set_type DIE and put it in
5544 the DIE's type field. */
5546 static struct type
*
5547 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5549 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5550 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5553 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
5554 return set_die_type (die
, set_type
, cu
);
5557 /* First cut: install each common block member as a global variable. */
5560 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5562 struct die_info
*child_die
;
5563 struct attribute
*attr
;
5565 CORE_ADDR base
= (CORE_ADDR
) 0;
5567 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5570 /* Support the .debug_loc offsets */
5571 if (attr_form_is_block (attr
))
5573 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5575 else if (attr_form_is_section_offset (attr
))
5577 dwarf2_complex_location_expr_complaint ();
5581 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5582 "common block member");
5585 if (die
->child
!= NULL
)
5587 child_die
= die
->child
;
5588 while (child_die
&& child_die
->tag
)
5590 sym
= new_symbol (child_die
, NULL
, cu
);
5591 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5594 CORE_ADDR byte_offset
= 0;
5596 if (attr_form_is_section_offset (attr
))
5597 dwarf2_complex_location_expr_complaint ();
5598 else if (attr_form_is_constant (attr
))
5599 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5600 else if (attr_form_is_block (attr
))
5601 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5603 dwarf2_complex_location_expr_complaint ();
5605 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5606 add_symbol_to_list (sym
, &global_symbols
);
5608 child_die
= sibling_die (child_die
);
5613 /* Create a type for a C++ namespace. */
5615 static struct type
*
5616 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5618 struct objfile
*objfile
= cu
->objfile
;
5619 const char *previous_prefix
, *name
;
5623 /* For extensions, reuse the type of the original namespace. */
5624 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5626 struct die_info
*ext_die
;
5627 struct dwarf2_cu
*ext_cu
= cu
;
5629 ext_die
= dwarf2_extension (die
, &ext_cu
);
5630 type
= read_type_die (ext_die
, ext_cu
);
5631 return set_die_type (die
, type
, cu
);
5634 name
= namespace_name (die
, &is_anonymous
, cu
);
5636 /* Now build the name of the current namespace. */
5638 previous_prefix
= determine_prefix (die
, cu
);
5639 if (previous_prefix
[0] != '\0')
5640 name
= typename_concat (&objfile
->objfile_obstack
,
5641 previous_prefix
, name
, cu
);
5643 /* Create the type. */
5644 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5646 TYPE_NAME (type
) = (char *) name
;
5647 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5649 return set_die_type (die
, type
, cu
);
5652 /* Read a C++ namespace. */
5655 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5657 struct objfile
*objfile
= cu
->objfile
;
5661 /* Add a symbol associated to this if we haven't seen the namespace
5662 before. Also, add a using directive if it's an anonymous
5665 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5669 type
= read_type_die (die
, cu
);
5670 new_symbol (die
, type
, cu
);
5672 name
= namespace_name (die
, &is_anonymous
, cu
);
5675 const char *previous_prefix
= determine_prefix (die
, cu
);
5677 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5678 NULL
, &objfile
->objfile_obstack
);
5682 if (die
->child
!= NULL
)
5684 struct die_info
*child_die
= die
->child
;
5686 while (child_die
&& child_die
->tag
)
5688 process_die (child_die
, cu
);
5689 child_die
= sibling_die (child_die
);
5694 /* Read a Fortran module. */
5697 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5699 struct die_info
*child_die
= die
->child
;
5701 /* FIXME: Support the separate Fortran module namespaces. */
5703 while (child_die
&& child_die
->tag
)
5705 process_die (child_die
, cu
);
5706 child_die
= sibling_die (child_die
);
5710 /* Return the name of the namespace represented by DIE. Set
5711 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5715 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5717 struct die_info
*current_die
;
5718 const char *name
= NULL
;
5720 /* Loop through the extensions until we find a name. */
5722 for (current_die
= die
;
5723 current_die
!= NULL
;
5724 current_die
= dwarf2_extension (die
, &cu
))
5726 name
= dwarf2_name (current_die
, cu
);
5731 /* Is it an anonymous namespace? */
5733 *is_anonymous
= (name
== NULL
);
5735 name
= "(anonymous namespace)";
5740 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5741 the user defined type vector. */
5743 static struct type
*
5744 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5746 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5747 struct comp_unit_head
*cu_header
= &cu
->header
;
5749 struct attribute
*attr_byte_size
;
5750 struct attribute
*attr_address_class
;
5751 int byte_size
, addr_class
;
5753 type
= lookup_pointer_type (die_type (die
, cu
));
5755 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5757 byte_size
= DW_UNSND (attr_byte_size
);
5759 byte_size
= cu_header
->addr_size
;
5761 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5762 if (attr_address_class
)
5763 addr_class
= DW_UNSND (attr_address_class
);
5765 addr_class
= DW_ADDR_none
;
5767 /* If the pointer size or address class is different than the
5768 default, create a type variant marked as such and set the
5769 length accordingly. */
5770 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5772 if (gdbarch_address_class_type_flags_p (gdbarch
))
5776 type_flags
= gdbarch_address_class_type_flags
5777 (gdbarch
, byte_size
, addr_class
);
5778 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5780 type
= make_type_with_address_space (type
, type_flags
);
5782 else if (TYPE_LENGTH (type
) != byte_size
)
5784 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5788 /* Should we also complain about unhandled address classes? */
5792 TYPE_LENGTH (type
) = byte_size
;
5793 return set_die_type (die
, type
, cu
);
5796 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5797 the user defined type vector. */
5799 static struct type
*
5800 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5803 struct type
*to_type
;
5804 struct type
*domain
;
5806 to_type
= die_type (die
, cu
);
5807 domain
= die_containing_type (die
, cu
);
5809 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5810 type
= lookup_methodptr_type (to_type
);
5812 type
= lookup_memberptr_type (to_type
, domain
);
5814 return set_die_type (die
, type
, cu
);
5817 /* Extract all information from a DW_TAG_reference_type DIE and add to
5818 the user defined type vector. */
5820 static struct type
*
5821 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5823 struct comp_unit_head
*cu_header
= &cu
->header
;
5825 struct attribute
*attr
;
5827 type
= lookup_reference_type (die_type (die
, cu
));
5828 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5831 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5835 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5837 return set_die_type (die
, type
, cu
);
5840 static struct type
*
5841 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5843 struct type
*base_type
, *cv_type
;
5845 base_type
= die_type (die
, cu
);
5846 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5847 return set_die_type (die
, cv_type
, cu
);
5850 static struct type
*
5851 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5853 struct type
*base_type
, *cv_type
;
5855 base_type
= die_type (die
, cu
);
5856 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5857 return set_die_type (die
, cv_type
, cu
);
5860 /* Extract all information from a DW_TAG_string_type DIE and add to
5861 the user defined type vector. It isn't really a user defined type,
5862 but it behaves like one, with other DIE's using an AT_user_def_type
5863 attribute to reference it. */
5865 static struct type
*
5866 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5868 struct objfile
*objfile
= cu
->objfile
;
5869 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5870 struct type
*type
, *range_type
, *index_type
, *char_type
;
5871 struct attribute
*attr
;
5872 unsigned int length
;
5874 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5877 length
= DW_UNSND (attr
);
5881 /* check for the DW_AT_byte_size attribute */
5882 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5885 length
= DW_UNSND (attr
);
5893 index_type
= objfile_type (objfile
)->builtin_int
;
5894 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5895 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5896 type
= create_string_type (NULL
, char_type
, range_type
);
5898 return set_die_type (die
, type
, cu
);
5901 /* Handle DIES due to C code like:
5905 int (*funcp)(int a, long l);
5909 ('funcp' generates a DW_TAG_subroutine_type DIE)
5912 static struct type
*
5913 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5915 struct type
*type
; /* Type that this function returns */
5916 struct type
*ftype
; /* Function that returns above type */
5917 struct attribute
*attr
;
5919 type
= die_type (die
, cu
);
5920 ftype
= lookup_function_type (type
);
5922 /* All functions in C++, Pascal and Java have prototypes. */
5923 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5924 if ((attr
&& (DW_UNSND (attr
) != 0))
5925 || cu
->language
== language_cplus
5926 || cu
->language
== language_java
5927 || cu
->language
== language_pascal
)
5928 TYPE_PROTOTYPED (ftype
) = 1;
5929 else if (producer_is_realview (cu
->producer
))
5930 /* RealView does not emit DW_AT_prototyped. We can not
5931 distinguish prototyped and unprototyped functions; default to
5932 prototyped, since that is more common in modern code (and
5933 RealView warns about unprototyped functions). */
5934 TYPE_PROTOTYPED (ftype
) = 1;
5936 /* Store the calling convention in the type if it's available in
5937 the subroutine die. Otherwise set the calling convention to
5938 the default value DW_CC_normal. */
5939 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5940 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5942 /* We need to add the subroutine type to the die immediately so
5943 we don't infinitely recurse when dealing with parameters
5944 declared as the same subroutine type. */
5945 set_die_type (die
, ftype
, cu
);
5947 if (die
->child
!= NULL
)
5949 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
5950 struct die_info
*child_die
;
5951 int nparams
, iparams
;
5953 /* Count the number of parameters.
5954 FIXME: GDB currently ignores vararg functions, but knows about
5955 vararg member functions. */
5957 child_die
= die
->child
;
5958 while (child_die
&& child_die
->tag
)
5960 if (child_die
->tag
== DW_TAG_formal_parameter
)
5962 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5963 TYPE_VARARGS (ftype
) = 1;
5964 child_die
= sibling_die (child_die
);
5967 /* Allocate storage for parameters and fill them in. */
5968 TYPE_NFIELDS (ftype
) = nparams
;
5969 TYPE_FIELDS (ftype
) = (struct field
*)
5970 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5972 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
5973 even if we error out during the parameters reading below. */
5974 for (iparams
= 0; iparams
< nparams
; iparams
++)
5975 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
5978 child_die
= die
->child
;
5979 while (child_die
&& child_die
->tag
)
5981 if (child_die
->tag
== DW_TAG_formal_parameter
)
5983 /* Dwarf2 has no clean way to discern C++ static and non-static
5984 member functions. G++ helps GDB by marking the first
5985 parameter for non-static member functions (which is the
5986 this pointer) as artificial. We pass this information
5987 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5988 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5990 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5993 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5995 /* GCC/43521: In java, the formal parameter
5996 "this" is sometimes not marked with DW_AT_artificial. */
5997 if (cu
->language
== language_java
)
5999 const char *name
= dwarf2_name (child_die
, cu
);
6001 if (name
&& !strcmp (name
, "this"))
6002 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
6005 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
6008 child_die
= sibling_die (child_die
);
6015 static struct type
*
6016 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6018 struct objfile
*objfile
= cu
->objfile
;
6019 const char *name
= NULL
;
6020 struct type
*this_type
;
6022 name
= dwarf2_full_name (NULL
, die
, cu
);
6023 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6024 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6025 TYPE_NAME (this_type
) = (char *) name
;
6026 set_die_type (die
, this_type
, cu
);
6027 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6031 /* Find a representation of a given base type and install
6032 it in the TYPE field of the die. */
6034 static struct type
*
6035 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6037 struct objfile
*objfile
= cu
->objfile
;
6039 struct attribute
*attr
;
6040 int encoding
= 0, size
= 0;
6042 enum type_code code
= TYPE_CODE_INT
;
6044 struct type
*target_type
= NULL
;
6046 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6049 encoding
= DW_UNSND (attr
);
6051 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6054 size
= DW_UNSND (attr
);
6056 name
= dwarf2_name (die
, cu
);
6059 complaint (&symfile_complaints
,
6060 _("DW_AT_name missing from DW_TAG_base_type"));
6065 case DW_ATE_address
:
6066 /* Turn DW_ATE_address into a void * pointer. */
6067 code
= TYPE_CODE_PTR
;
6068 type_flags
|= TYPE_FLAG_UNSIGNED
;
6069 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6071 case DW_ATE_boolean
:
6072 code
= TYPE_CODE_BOOL
;
6073 type_flags
|= TYPE_FLAG_UNSIGNED
;
6075 case DW_ATE_complex_float
:
6076 code
= TYPE_CODE_COMPLEX
;
6077 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6079 case DW_ATE_decimal_float
:
6080 code
= TYPE_CODE_DECFLOAT
;
6083 code
= TYPE_CODE_FLT
;
6087 case DW_ATE_unsigned
:
6088 type_flags
|= TYPE_FLAG_UNSIGNED
;
6090 case DW_ATE_signed_char
:
6091 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6092 || cu
->language
== language_pascal
)
6093 code
= TYPE_CODE_CHAR
;
6095 case DW_ATE_unsigned_char
:
6096 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6097 || cu
->language
== language_pascal
)
6098 code
= TYPE_CODE_CHAR
;
6099 type_flags
|= TYPE_FLAG_UNSIGNED
;
6102 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6103 dwarf_type_encoding_name (encoding
));
6107 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6108 TYPE_NAME (type
) = name
;
6109 TYPE_TARGET_TYPE (type
) = target_type
;
6111 if (name
&& strcmp (name
, "char") == 0)
6112 TYPE_NOSIGN (type
) = 1;
6114 return set_die_type (die
, type
, cu
);
6117 /* Read the given DW_AT_subrange DIE. */
6119 static struct type
*
6120 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6122 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6123 struct type
*base_type
;
6124 struct type
*range_type
;
6125 struct attribute
*attr
;
6129 LONGEST negative_mask
;
6131 base_type
= die_type (die
, cu
);
6132 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6134 complaint (&symfile_complaints
,
6135 _("DW_AT_type missing from DW_TAG_subrange_type"));
6137 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6138 0, NULL
, cu
->objfile
);
6141 if (cu
->language
== language_fortran
)
6143 /* FORTRAN implies a lower bound of 1, if not given. */
6147 /* FIXME: For variable sized arrays either of these could be
6148 a variable rather than a constant value. We'll allow it,
6149 but we don't know how to handle it. */
6150 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6152 low
= dwarf2_get_attr_constant_value (attr
, 0);
6154 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6157 if (attr
->form
== DW_FORM_block1
)
6159 /* GCC encodes arrays with unspecified or dynamic length
6160 with a DW_FORM_block1 attribute.
6161 FIXME: GDB does not yet know how to handle dynamic
6162 arrays properly, treat them as arrays with unspecified
6165 FIXME: jimb/2003-09-22: GDB does not really know
6166 how to handle arrays of unspecified length
6167 either; we just represent them as zero-length
6168 arrays. Choose an appropriate upper bound given
6169 the lower bound we've computed above. */
6173 high
= dwarf2_get_attr_constant_value (attr
, 1);
6177 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6178 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6179 low
|= negative_mask
;
6180 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6181 high
|= negative_mask
;
6183 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6185 /* Mark arrays with dynamic length at least as an array of unspecified
6186 length. GDB could check the boundary but before it gets implemented at
6187 least allow accessing the array elements. */
6188 if (attr
&& attr
->form
== DW_FORM_block1
)
6189 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6191 name
= dwarf2_name (die
, cu
);
6193 TYPE_NAME (range_type
) = name
;
6195 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6197 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6199 set_descriptive_type (range_type
, die
, cu
);
6201 return set_die_type (die
, range_type
, cu
);
6204 static struct type
*
6205 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6209 /* For now, we only support the C meaning of an unspecified type: void. */
6211 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6212 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6214 return set_die_type (die
, type
, cu
);
6217 /* Trivial hash function for die_info: the hash value of a DIE
6218 is its offset in .debug_info for this objfile. */
6221 die_hash (const void *item
)
6223 const struct die_info
*die
= item
;
6228 /* Trivial comparison function for die_info structures: two DIEs
6229 are equal if they have the same offset. */
6232 die_eq (const void *item_lhs
, const void *item_rhs
)
6234 const struct die_info
*die_lhs
= item_lhs
;
6235 const struct die_info
*die_rhs
= item_rhs
;
6237 return die_lhs
->offset
== die_rhs
->offset
;
6240 /* Read a whole compilation unit into a linked list of dies. */
6242 static struct die_info
*
6243 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6245 struct die_reader_specs reader_specs
;
6247 gdb_assert (cu
->die_hash
== NULL
);
6249 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6253 &cu
->comp_unit_obstack
,
6254 hashtab_obstack_allocate
,
6255 dummy_obstack_deallocate
);
6257 init_cu_die_reader (&reader_specs
, cu
);
6259 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6262 /* Main entry point for reading a DIE and all children.
6263 Read the DIE and dump it if requested. */
6265 static struct die_info
*
6266 read_die_and_children (const struct die_reader_specs
*reader
,
6268 gdb_byte
**new_info_ptr
,
6269 struct die_info
*parent
)
6271 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6272 new_info_ptr
, parent
);
6274 if (dwarf2_die_debug
)
6276 fprintf_unfiltered (gdb_stdlog
,
6277 "\nRead die from %s of %s:\n",
6278 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6280 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6282 : "unknown section",
6283 reader
->abfd
->filename
);
6284 dump_die (result
, dwarf2_die_debug
);
6290 /* Read a single die and all its descendents. Set the die's sibling
6291 field to NULL; set other fields in the die correctly, and set all
6292 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6293 location of the info_ptr after reading all of those dies. PARENT
6294 is the parent of the die in question. */
6296 static struct die_info
*
6297 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6299 gdb_byte
**new_info_ptr
,
6300 struct die_info
*parent
)
6302 struct die_info
*die
;
6306 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6309 *new_info_ptr
= cur_ptr
;
6312 store_in_ref_table (die
, reader
->cu
);
6315 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6319 *new_info_ptr
= cur_ptr
;
6322 die
->sibling
= NULL
;
6323 die
->parent
= parent
;
6327 /* Read a die, all of its descendents, and all of its siblings; set
6328 all of the fields of all of the dies correctly. Arguments are as
6329 in read_die_and_children. */
6331 static struct die_info
*
6332 read_die_and_siblings (const struct die_reader_specs
*reader
,
6334 gdb_byte
**new_info_ptr
,
6335 struct die_info
*parent
)
6337 struct die_info
*first_die
, *last_sibling
;
6341 first_die
= last_sibling
= NULL
;
6345 struct die_info
*die
6346 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6350 *new_info_ptr
= cur_ptr
;
6357 last_sibling
->sibling
= die
;
6363 /* Read the die from the .debug_info section buffer. Set DIEP to
6364 point to a newly allocated die with its information, except for its
6365 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6366 whether the die has children or not. */
6369 read_full_die (const struct die_reader_specs
*reader
,
6370 struct die_info
**diep
, gdb_byte
*info_ptr
,
6373 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6374 struct abbrev_info
*abbrev
;
6375 struct die_info
*die
;
6376 struct dwarf2_cu
*cu
= reader
->cu
;
6377 bfd
*abfd
= reader
->abfd
;
6379 offset
= info_ptr
- reader
->buffer
;
6380 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6381 info_ptr
+= bytes_read
;
6389 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6391 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6393 bfd_get_filename (abfd
));
6395 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6396 die
->offset
= offset
;
6397 die
->tag
= abbrev
->tag
;
6398 die
->abbrev
= abbrev_number
;
6400 die
->num_attrs
= abbrev
->num_attrs
;
6402 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6403 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6404 abfd
, info_ptr
, cu
);
6407 *has_children
= abbrev
->has_children
;
6411 /* In DWARF version 2, the description of the debugging information is
6412 stored in a separate .debug_abbrev section. Before we read any
6413 dies from a section we read in all abbreviations and install them
6414 in a hash table. This function also sets flags in CU describing
6415 the data found in the abbrev table. */
6418 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6420 struct comp_unit_head
*cu_header
= &cu
->header
;
6421 gdb_byte
*abbrev_ptr
;
6422 struct abbrev_info
*cur_abbrev
;
6423 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6424 unsigned int abbrev_form
, hash_number
;
6425 struct attr_abbrev
*cur_attrs
;
6426 unsigned int allocated_attrs
;
6428 /* Initialize dwarf2 abbrevs */
6429 obstack_init (&cu
->abbrev_obstack
);
6430 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6432 * sizeof (struct abbrev_info
*)));
6433 memset (cu
->dwarf2_abbrevs
, 0,
6434 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6436 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6437 &dwarf2_per_objfile
->abbrev
);
6438 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6439 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6440 abbrev_ptr
+= bytes_read
;
6442 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6443 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6445 /* loop until we reach an abbrev number of 0 */
6446 while (abbrev_number
)
6448 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6450 /* read in abbrev header */
6451 cur_abbrev
->number
= abbrev_number
;
6452 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6453 abbrev_ptr
+= bytes_read
;
6454 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6457 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6458 cu
->has_namespace_info
= 1;
6460 /* now read in declarations */
6461 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6462 abbrev_ptr
+= bytes_read
;
6463 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6464 abbrev_ptr
+= bytes_read
;
6467 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6469 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6471 = xrealloc (cur_attrs
, (allocated_attrs
6472 * sizeof (struct attr_abbrev
)));
6475 /* Record whether this compilation unit might have
6476 inter-compilation-unit references. If we don't know what form
6477 this attribute will have, then it might potentially be a
6478 DW_FORM_ref_addr, so we conservatively expect inter-CU
6481 if (abbrev_form
== DW_FORM_ref_addr
6482 || abbrev_form
== DW_FORM_indirect
)
6483 cu
->has_form_ref_addr
= 1;
6485 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6486 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6487 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6488 abbrev_ptr
+= bytes_read
;
6489 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6490 abbrev_ptr
+= bytes_read
;
6493 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6494 (cur_abbrev
->num_attrs
6495 * sizeof (struct attr_abbrev
)));
6496 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6497 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6499 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6500 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6501 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6503 /* Get next abbreviation.
6504 Under Irix6 the abbreviations for a compilation unit are not
6505 always properly terminated with an abbrev number of 0.
6506 Exit loop if we encounter an abbreviation which we have
6507 already read (which means we are about to read the abbreviations
6508 for the next compile unit) or if the end of the abbreviation
6509 table is reached. */
6510 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6511 >= dwarf2_per_objfile
->abbrev
.size
)
6513 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6514 abbrev_ptr
+= bytes_read
;
6515 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6522 /* Release the memory used by the abbrev table for a compilation unit. */
6525 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6527 struct dwarf2_cu
*cu
= ptr_to_cu
;
6529 obstack_free (&cu
->abbrev_obstack
, NULL
);
6530 cu
->dwarf2_abbrevs
= NULL
;
6533 /* Lookup an abbrev_info structure in the abbrev hash table. */
6535 static struct abbrev_info
*
6536 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6538 unsigned int hash_number
;
6539 struct abbrev_info
*abbrev
;
6541 hash_number
= number
% ABBREV_HASH_SIZE
;
6542 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6546 if (abbrev
->number
== number
)
6549 abbrev
= abbrev
->next
;
6554 /* Returns nonzero if TAG represents a type that we might generate a partial
6558 is_type_tag_for_partial (int tag
)
6563 /* Some types that would be reasonable to generate partial symbols for,
6564 that we don't at present. */
6565 case DW_TAG_array_type
:
6566 case DW_TAG_file_type
:
6567 case DW_TAG_ptr_to_member_type
:
6568 case DW_TAG_set_type
:
6569 case DW_TAG_string_type
:
6570 case DW_TAG_subroutine_type
:
6572 case DW_TAG_base_type
:
6573 case DW_TAG_class_type
:
6574 case DW_TAG_interface_type
:
6575 case DW_TAG_enumeration_type
:
6576 case DW_TAG_structure_type
:
6577 case DW_TAG_subrange_type
:
6578 case DW_TAG_typedef
:
6579 case DW_TAG_union_type
:
6586 /* Load all DIEs that are interesting for partial symbols into memory. */
6588 static struct partial_die_info
*
6589 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6590 int building_psymtab
, struct dwarf2_cu
*cu
)
6592 struct partial_die_info
*part_die
;
6593 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6594 struct abbrev_info
*abbrev
;
6595 unsigned int bytes_read
;
6596 unsigned int load_all
= 0;
6598 int nesting_level
= 1;
6603 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6607 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6611 &cu
->comp_unit_obstack
,
6612 hashtab_obstack_allocate
,
6613 dummy_obstack_deallocate
);
6615 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6616 sizeof (struct partial_die_info
));
6620 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6622 /* A NULL abbrev means the end of a series of children. */
6625 if (--nesting_level
== 0)
6627 /* PART_DIE was probably the last thing allocated on the
6628 comp_unit_obstack, so we could call obstack_free
6629 here. We don't do that because the waste is small,
6630 and will be cleaned up when we're done with this
6631 compilation unit. This way, we're also more robust
6632 against other users of the comp_unit_obstack. */
6635 info_ptr
+= bytes_read
;
6636 last_die
= parent_die
;
6637 parent_die
= parent_die
->die_parent
;
6641 /* Check whether this DIE is interesting enough to save. Normally
6642 we would not be interested in members here, but there may be
6643 later variables referencing them via DW_AT_specification (for
6646 && !is_type_tag_for_partial (abbrev
->tag
)
6647 && abbrev
->tag
!= DW_TAG_enumerator
6648 && abbrev
->tag
!= DW_TAG_subprogram
6649 && abbrev
->tag
!= DW_TAG_lexical_block
6650 && abbrev
->tag
!= DW_TAG_variable
6651 && abbrev
->tag
!= DW_TAG_namespace
6652 && abbrev
->tag
!= DW_TAG_member
)
6654 /* Otherwise we skip to the next sibling, if any. */
6655 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6659 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6660 buffer
, info_ptr
, cu
);
6662 /* This two-pass algorithm for processing partial symbols has a
6663 high cost in cache pressure. Thus, handle some simple cases
6664 here which cover the majority of C partial symbols. DIEs
6665 which neither have specification tags in them, nor could have
6666 specification tags elsewhere pointing at them, can simply be
6667 processed and discarded.
6669 This segment is also optional; scan_partial_symbols and
6670 add_partial_symbol will handle these DIEs if we chain
6671 them in normally. When compilers which do not emit large
6672 quantities of duplicate debug information are more common,
6673 this code can probably be removed. */
6675 /* Any complete simple types at the top level (pretty much all
6676 of them, for a language without namespaces), can be processed
6678 if (parent_die
== NULL
6679 && part_die
->has_specification
== 0
6680 && part_die
->is_declaration
== 0
6681 && (part_die
->tag
== DW_TAG_typedef
6682 || part_die
->tag
== DW_TAG_base_type
6683 || part_die
->tag
== DW_TAG_subrange_type
))
6685 if (building_psymtab
&& part_die
->name
!= NULL
)
6686 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6687 VAR_DOMAIN
, LOC_TYPEDEF
,
6688 &cu
->objfile
->static_psymbols
,
6689 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6690 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6694 /* If we're at the second level, and we're an enumerator, and
6695 our parent has no specification (meaning possibly lives in a
6696 namespace elsewhere), then we can add the partial symbol now
6697 instead of queueing it. */
6698 if (part_die
->tag
== DW_TAG_enumerator
6699 && parent_die
!= NULL
6700 && parent_die
->die_parent
== NULL
6701 && parent_die
->tag
== DW_TAG_enumeration_type
6702 && parent_die
->has_specification
== 0)
6704 if (part_die
->name
== NULL
)
6705 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6706 else if (building_psymtab
)
6707 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6708 VAR_DOMAIN
, LOC_CONST
,
6709 (cu
->language
== language_cplus
6710 || cu
->language
== language_java
)
6711 ? &cu
->objfile
->global_psymbols
6712 : &cu
->objfile
->static_psymbols
,
6713 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6715 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6719 /* We'll save this DIE so link it in. */
6720 part_die
->die_parent
= parent_die
;
6721 part_die
->die_sibling
= NULL
;
6722 part_die
->die_child
= NULL
;
6724 if (last_die
&& last_die
== parent_die
)
6725 last_die
->die_child
= part_die
;
6727 last_die
->die_sibling
= part_die
;
6729 last_die
= part_die
;
6731 if (first_die
== NULL
)
6732 first_die
= part_die
;
6734 /* Maybe add the DIE to the hash table. Not all DIEs that we
6735 find interesting need to be in the hash table, because we
6736 also have the parent/sibling/child chains; only those that we
6737 might refer to by offset later during partial symbol reading.
6739 For now this means things that might have be the target of a
6740 DW_AT_specification, DW_AT_abstract_origin, or
6741 DW_AT_extension. DW_AT_extension will refer only to
6742 namespaces; DW_AT_abstract_origin refers to functions (and
6743 many things under the function DIE, but we do not recurse
6744 into function DIEs during partial symbol reading) and
6745 possibly variables as well; DW_AT_specification refers to
6746 declarations. Declarations ought to have the DW_AT_declaration
6747 flag. It happens that GCC forgets to put it in sometimes, but
6748 only for functions, not for types.
6750 Adding more things than necessary to the hash table is harmless
6751 except for the performance cost. Adding too few will result in
6752 wasted time in find_partial_die, when we reread the compilation
6753 unit with load_all_dies set. */
6756 || abbrev
->tag
== DW_TAG_subprogram
6757 || abbrev
->tag
== DW_TAG_variable
6758 || abbrev
->tag
== DW_TAG_namespace
6759 || part_die
->is_declaration
)
6763 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6764 part_die
->offset
, INSERT
);
6768 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6769 sizeof (struct partial_die_info
));
6771 /* For some DIEs we want to follow their children (if any). For C
6772 we have no reason to follow the children of structures; for other
6773 languages we have to, both so that we can get at method physnames
6774 to infer fully qualified class names, and for DW_AT_specification.
6776 For Ada, we need to scan the children of subprograms and lexical
6777 blocks as well because Ada allows the definition of nested
6778 entities that could be interesting for the debugger, such as
6779 nested subprograms for instance. */
6780 if (last_die
->has_children
6782 || last_die
->tag
== DW_TAG_namespace
6783 || last_die
->tag
== DW_TAG_enumeration_type
6784 || (cu
->language
!= language_c
6785 && (last_die
->tag
== DW_TAG_class_type
6786 || last_die
->tag
== DW_TAG_interface_type
6787 || last_die
->tag
== DW_TAG_structure_type
6788 || last_die
->tag
== DW_TAG_union_type
))
6789 || (cu
->language
== language_ada
6790 && (last_die
->tag
== DW_TAG_subprogram
6791 || last_die
->tag
== DW_TAG_lexical_block
))))
6794 parent_die
= last_die
;
6798 /* Otherwise we skip to the next sibling, if any. */
6799 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6801 /* Back to the top, do it again. */
6805 /* Read a minimal amount of information into the minimal die structure. */
6808 read_partial_die (struct partial_die_info
*part_die
,
6809 struct abbrev_info
*abbrev
,
6810 unsigned int abbrev_len
, bfd
*abfd
,
6811 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6812 struct dwarf2_cu
*cu
)
6815 struct attribute attr
;
6816 int has_low_pc_attr
= 0;
6817 int has_high_pc_attr
= 0;
6819 memset (part_die
, 0, sizeof (struct partial_die_info
));
6821 part_die
->offset
= info_ptr
- buffer
;
6823 info_ptr
+= abbrev_len
;
6828 part_die
->tag
= abbrev
->tag
;
6829 part_die
->has_children
= abbrev
->has_children
;
6831 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6833 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6835 /* Store the data if it is of an attribute we want to keep in a
6836 partial symbol table. */
6840 switch (part_die
->tag
)
6842 case DW_TAG_compile_unit
:
6843 case DW_TAG_type_unit
:
6844 /* Compilation units have a DW_AT_name that is a filename, not
6845 a source language identifier. */
6846 case DW_TAG_enumeration_type
:
6847 case DW_TAG_enumerator
:
6848 /* These tags always have simple identifiers already; no need
6849 to canonicalize them. */
6850 part_die
->name
= DW_STRING (&attr
);
6854 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6855 &cu
->objfile
->objfile_obstack
);
6859 case DW_AT_linkage_name
:
6860 case DW_AT_MIPS_linkage_name
:
6861 /* Note that both forms of linkage name might appear. We
6862 assume they will be the same, and we only store the last
6864 if (cu
->language
== language_ada
)
6865 part_die
->name
= DW_STRING (&attr
);
6868 has_low_pc_attr
= 1;
6869 part_die
->lowpc
= DW_ADDR (&attr
);
6872 has_high_pc_attr
= 1;
6873 part_die
->highpc
= DW_ADDR (&attr
);
6875 case DW_AT_location
:
6876 /* Support the .debug_loc offsets */
6877 if (attr_form_is_block (&attr
))
6879 part_die
->locdesc
= DW_BLOCK (&attr
);
6881 else if (attr_form_is_section_offset (&attr
))
6883 dwarf2_complex_location_expr_complaint ();
6887 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6888 "partial symbol information");
6891 case DW_AT_external
:
6892 part_die
->is_external
= DW_UNSND (&attr
);
6894 case DW_AT_declaration
:
6895 part_die
->is_declaration
= DW_UNSND (&attr
);
6898 part_die
->has_type
= 1;
6900 case DW_AT_abstract_origin
:
6901 case DW_AT_specification
:
6902 case DW_AT_extension
:
6903 part_die
->has_specification
= 1;
6904 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6907 /* Ignore absolute siblings, they might point outside of
6908 the current compile unit. */
6909 if (attr
.form
== DW_FORM_ref_addr
)
6910 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6912 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6914 case DW_AT_byte_size
:
6915 part_die
->has_byte_size
= 1;
6917 case DW_AT_calling_convention
:
6918 /* DWARF doesn't provide a way to identify a program's source-level
6919 entry point. DW_AT_calling_convention attributes are only meant
6920 to describe functions' calling conventions.
6922 However, because it's a necessary piece of information in
6923 Fortran, and because DW_CC_program is the only piece of debugging
6924 information whose definition refers to a 'main program' at all,
6925 several compilers have begun marking Fortran main programs with
6926 DW_CC_program --- even when those functions use the standard
6927 calling conventions.
6929 So until DWARF specifies a way to provide this information and
6930 compilers pick up the new representation, we'll support this
6932 if (DW_UNSND (&attr
) == DW_CC_program
6933 && cu
->language
== language_fortran
)
6934 set_main_name (part_die
->name
);
6941 /* When using the GNU linker, .gnu.linkonce. sections are used to
6942 eliminate duplicate copies of functions and vtables and such.
6943 The linker will arbitrarily choose one and discard the others.
6944 The AT_*_pc values for such functions refer to local labels in
6945 these sections. If the section from that file was discarded, the
6946 labels are not in the output, so the relocs get a value of 0.
6947 If this is a discarded function, mark the pc bounds as invalid,
6948 so that GDB will ignore it. */
6949 if (has_low_pc_attr
&& has_high_pc_attr
6950 && part_die
->lowpc
< part_die
->highpc
6951 && (part_die
->lowpc
!= 0
6952 || dwarf2_per_objfile
->has_section_at_zero
))
6953 part_die
->has_pc_info
= 1;
6958 /* Find a cached partial DIE at OFFSET in CU. */
6960 static struct partial_die_info
*
6961 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6963 struct partial_die_info
*lookup_die
= NULL
;
6964 struct partial_die_info part_die
;
6966 part_die
.offset
= offset
;
6967 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6972 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6973 except in the case of .debug_types DIEs which do not reference
6974 outside their CU (they do however referencing other types via
6977 static struct partial_die_info
*
6978 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6980 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6981 struct partial_die_info
*pd
= NULL
;
6983 if (cu
->per_cu
->from_debug_types
)
6985 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6991 if (offset_in_cu_p (&cu
->header
, offset
))
6993 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6998 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
7000 if (per_cu
->cu
== NULL
)
7002 load_partial_comp_unit (per_cu
, cu
->objfile
);
7003 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7004 dwarf2_per_objfile
->read_in_chain
= per_cu
;
7007 per_cu
->cu
->last_used
= 0;
7008 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7010 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
7012 struct cleanup
*back_to
;
7013 struct partial_die_info comp_unit_die
;
7014 struct abbrev_info
*abbrev
;
7015 unsigned int bytes_read
;
7018 per_cu
->load_all_dies
= 1;
7020 /* Re-read the DIEs. */
7021 back_to
= make_cleanup (null_cleanup
, 0);
7022 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7024 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7025 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7027 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7028 + per_cu
->cu
->header
.offset
7029 + per_cu
->cu
->header
.first_die_offset
);
7030 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7031 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7032 per_cu
->cu
->objfile
->obfd
,
7033 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7035 if (comp_unit_die
.has_children
)
7036 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7037 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7039 do_cleanups (back_to
);
7041 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7047 internal_error (__FILE__
, __LINE__
,
7048 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7049 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7053 /* Adjust PART_DIE before generating a symbol for it. This function
7054 may set the is_external flag or change the DIE's name. */
7057 fixup_partial_die (struct partial_die_info
*part_die
,
7058 struct dwarf2_cu
*cu
)
7060 /* If we found a reference attribute and the DIE has no name, try
7061 to find a name in the referred to DIE. */
7063 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7065 struct partial_die_info
*spec_die
;
7067 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7069 fixup_partial_die (spec_die
, cu
);
7073 part_die
->name
= spec_die
->name
;
7075 /* Copy DW_AT_external attribute if it is set. */
7076 if (spec_die
->is_external
)
7077 part_die
->is_external
= spec_die
->is_external
;
7081 /* Set default names for some unnamed DIEs. */
7082 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7083 || part_die
->tag
== DW_TAG_class_type
))
7084 part_die
->name
= "(anonymous class)";
7086 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7087 part_die
->name
= "(anonymous namespace)";
7089 if (part_die
->tag
== DW_TAG_structure_type
7090 || part_die
->tag
== DW_TAG_class_type
7091 || part_die
->tag
== DW_TAG_union_type
)
7092 guess_structure_name (part_die
, cu
);
7095 /* Read an attribute value described by an attribute form. */
7098 read_attribute_value (struct attribute
*attr
, unsigned form
,
7099 bfd
*abfd
, gdb_byte
*info_ptr
,
7100 struct dwarf2_cu
*cu
)
7102 struct comp_unit_head
*cu_header
= &cu
->header
;
7103 unsigned int bytes_read
;
7104 struct dwarf_block
*blk
;
7109 case DW_FORM_ref_addr
:
7110 if (cu
->header
.version
== 2)
7111 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7113 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7114 info_ptr
+= bytes_read
;
7117 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7118 info_ptr
+= bytes_read
;
7120 case DW_FORM_block2
:
7121 blk
= dwarf_alloc_block (cu
);
7122 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7124 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7125 info_ptr
+= blk
->size
;
7126 DW_BLOCK (attr
) = blk
;
7128 case DW_FORM_block4
:
7129 blk
= dwarf_alloc_block (cu
);
7130 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7132 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7133 info_ptr
+= blk
->size
;
7134 DW_BLOCK (attr
) = blk
;
7137 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7141 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7145 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7148 case DW_FORM_sec_offset
:
7149 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7150 info_ptr
+= bytes_read
;
7152 case DW_FORM_string
:
7153 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7154 DW_STRING_IS_CANONICAL (attr
) = 0;
7155 info_ptr
+= bytes_read
;
7158 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7160 DW_STRING_IS_CANONICAL (attr
) = 0;
7161 info_ptr
+= bytes_read
;
7163 case DW_FORM_exprloc
:
7165 blk
= dwarf_alloc_block (cu
);
7166 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7167 info_ptr
+= bytes_read
;
7168 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7169 info_ptr
+= blk
->size
;
7170 DW_BLOCK (attr
) = blk
;
7172 case DW_FORM_block1
:
7173 blk
= dwarf_alloc_block (cu
);
7174 blk
->size
= read_1_byte (abfd
, info_ptr
);
7176 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7177 info_ptr
+= blk
->size
;
7178 DW_BLOCK (attr
) = blk
;
7181 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7185 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7188 case DW_FORM_flag_present
:
7189 DW_UNSND (attr
) = 1;
7192 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7193 info_ptr
+= bytes_read
;
7196 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7197 info_ptr
+= bytes_read
;
7200 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7204 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7208 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7212 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7216 /* Convert the signature to something we can record in DW_UNSND
7218 NOTE: This is NULL if the type wasn't found. */
7219 DW_SIGNATURED_TYPE (attr
) =
7220 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7223 case DW_FORM_ref_udata
:
7224 DW_ADDR (attr
) = (cu
->header
.offset
7225 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7226 info_ptr
+= bytes_read
;
7228 case DW_FORM_indirect
:
7229 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7230 info_ptr
+= bytes_read
;
7231 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7234 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7235 dwarf_form_name (form
),
7236 bfd_get_filename (abfd
));
7239 /* We have seen instances where the compiler tried to emit a byte
7240 size attribute of -1 which ended up being encoded as an unsigned
7241 0xffffffff. Although 0xffffffff is technically a valid size value,
7242 an object of this size seems pretty unlikely so we can relatively
7243 safely treat these cases as if the size attribute was invalid and
7244 treat them as zero by default. */
7245 if (attr
->name
== DW_AT_byte_size
7246 && form
== DW_FORM_data4
7247 && DW_UNSND (attr
) >= 0xffffffff)
7250 (&symfile_complaints
,
7251 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7252 hex_string (DW_UNSND (attr
)));
7253 DW_UNSND (attr
) = 0;
7259 /* Read an attribute described by an abbreviated attribute. */
7262 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7263 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7265 attr
->name
= abbrev
->name
;
7266 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7269 /* read dwarf information from a buffer */
7272 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7274 return bfd_get_8 (abfd
, buf
);
7278 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7280 return bfd_get_signed_8 (abfd
, buf
);
7284 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7286 return bfd_get_16 (abfd
, buf
);
7290 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7292 return bfd_get_signed_16 (abfd
, buf
);
7296 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7298 return bfd_get_32 (abfd
, buf
);
7302 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7304 return bfd_get_signed_32 (abfd
, buf
);
7308 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7310 return bfd_get_64 (abfd
, buf
);
7314 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7315 unsigned int *bytes_read
)
7317 struct comp_unit_head
*cu_header
= &cu
->header
;
7318 CORE_ADDR retval
= 0;
7320 if (cu_header
->signed_addr_p
)
7322 switch (cu_header
->addr_size
)
7325 retval
= bfd_get_signed_16 (abfd
, buf
);
7328 retval
= bfd_get_signed_32 (abfd
, buf
);
7331 retval
= bfd_get_signed_64 (abfd
, buf
);
7334 internal_error (__FILE__
, __LINE__
,
7335 _("read_address: bad switch, signed [in module %s]"),
7336 bfd_get_filename (abfd
));
7341 switch (cu_header
->addr_size
)
7344 retval
= bfd_get_16 (abfd
, buf
);
7347 retval
= bfd_get_32 (abfd
, buf
);
7350 retval
= bfd_get_64 (abfd
, buf
);
7353 internal_error (__FILE__
, __LINE__
,
7354 _("read_address: bad switch, unsigned [in module %s]"),
7355 bfd_get_filename (abfd
));
7359 *bytes_read
= cu_header
->addr_size
;
7363 /* Read the initial length from a section. The (draft) DWARF 3
7364 specification allows the initial length to take up either 4 bytes
7365 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7366 bytes describe the length and all offsets will be 8 bytes in length
7369 An older, non-standard 64-bit format is also handled by this
7370 function. The older format in question stores the initial length
7371 as an 8-byte quantity without an escape value. Lengths greater
7372 than 2^32 aren't very common which means that the initial 4 bytes
7373 is almost always zero. Since a length value of zero doesn't make
7374 sense for the 32-bit format, this initial zero can be considered to
7375 be an escape value which indicates the presence of the older 64-bit
7376 format. As written, the code can't detect (old format) lengths
7377 greater than 4GB. If it becomes necessary to handle lengths
7378 somewhat larger than 4GB, we could allow other small values (such
7379 as the non-sensical values of 1, 2, and 3) to also be used as
7380 escape values indicating the presence of the old format.
7382 The value returned via bytes_read should be used to increment the
7383 relevant pointer after calling read_initial_length().
7385 [ Note: read_initial_length() and read_offset() are based on the
7386 document entitled "DWARF Debugging Information Format", revision
7387 3, draft 8, dated November 19, 2001. This document was obtained
7390 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7392 This document is only a draft and is subject to change. (So beware.)
7394 Details regarding the older, non-standard 64-bit format were
7395 determined empirically by examining 64-bit ELF files produced by
7396 the SGI toolchain on an IRIX 6.5 machine.
7398 - Kevin, July 16, 2002
7402 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7404 LONGEST length
= bfd_get_32 (abfd
, buf
);
7406 if (length
== 0xffffffff)
7408 length
= bfd_get_64 (abfd
, buf
+ 4);
7411 else if (length
== 0)
7413 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7414 length
= bfd_get_64 (abfd
, buf
);
7425 /* Cover function for read_initial_length.
7426 Returns the length of the object at BUF, and stores the size of the
7427 initial length in *BYTES_READ and stores the size that offsets will be in
7429 If the initial length size is not equivalent to that specified in
7430 CU_HEADER then issue a complaint.
7431 This is useful when reading non-comp-unit headers. */
7434 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7435 const struct comp_unit_head
*cu_header
,
7436 unsigned int *bytes_read
,
7437 unsigned int *offset_size
)
7439 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7441 gdb_assert (cu_header
->initial_length_size
== 4
7442 || cu_header
->initial_length_size
== 8
7443 || cu_header
->initial_length_size
== 12);
7445 if (cu_header
->initial_length_size
!= *bytes_read
)
7446 complaint (&symfile_complaints
,
7447 _("intermixed 32-bit and 64-bit DWARF sections"));
7449 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7453 /* Read an offset from the data stream. The size of the offset is
7454 given by cu_header->offset_size. */
7457 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7458 unsigned int *bytes_read
)
7460 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7462 *bytes_read
= cu_header
->offset_size
;
7466 /* Read an offset from the data stream. */
7469 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7473 switch (offset_size
)
7476 retval
= bfd_get_32 (abfd
, buf
);
7479 retval
= bfd_get_64 (abfd
, buf
);
7482 internal_error (__FILE__
, __LINE__
,
7483 _("read_offset_1: bad switch [in module %s]"),
7484 bfd_get_filename (abfd
));
7491 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7493 /* If the size of a host char is 8 bits, we can return a pointer
7494 to the buffer, otherwise we have to copy the data to a buffer
7495 allocated on the temporary obstack. */
7496 gdb_assert (HOST_CHAR_BIT
== 8);
7501 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7503 /* If the size of a host char is 8 bits, we can return a pointer
7504 to the string, otherwise we have to copy the string to a buffer
7505 allocated on the temporary obstack. */
7506 gdb_assert (HOST_CHAR_BIT
== 8);
7509 *bytes_read_ptr
= 1;
7512 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7513 return (char *) buf
;
7517 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7518 const struct comp_unit_head
*cu_header
,
7519 unsigned int *bytes_read_ptr
)
7521 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7523 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7524 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7526 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7527 bfd_get_filename (abfd
));
7530 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7532 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7533 bfd_get_filename (abfd
));
7536 gdb_assert (HOST_CHAR_BIT
== 8);
7537 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7539 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7542 static unsigned long
7543 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7545 unsigned long result
;
7546 unsigned int num_read
;
7556 byte
= bfd_get_8 (abfd
, buf
);
7559 result
|= ((unsigned long)(byte
& 127) << shift
);
7560 if ((byte
& 128) == 0)
7566 *bytes_read_ptr
= num_read
;
7571 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7574 int i
, shift
, num_read
;
7583 byte
= bfd_get_8 (abfd
, buf
);
7586 result
|= ((long)(byte
& 127) << shift
);
7588 if ((byte
& 128) == 0)
7593 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7594 result
|= -(((long)1) << shift
);
7595 *bytes_read_ptr
= num_read
;
7599 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7602 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7608 byte
= bfd_get_8 (abfd
, buf
);
7610 if ((byte
& 128) == 0)
7616 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7623 cu
->language
= language_c
;
7625 case DW_LANG_C_plus_plus
:
7626 cu
->language
= language_cplus
;
7629 cu
->language
= language_d
;
7631 case DW_LANG_Fortran77
:
7632 case DW_LANG_Fortran90
:
7633 case DW_LANG_Fortran95
:
7634 cu
->language
= language_fortran
;
7636 case DW_LANG_Mips_Assembler
:
7637 cu
->language
= language_asm
;
7640 cu
->language
= language_java
;
7644 cu
->language
= language_ada
;
7646 case DW_LANG_Modula2
:
7647 cu
->language
= language_m2
;
7649 case DW_LANG_Pascal83
:
7650 cu
->language
= language_pascal
;
7653 cu
->language
= language_objc
;
7655 case DW_LANG_Cobol74
:
7656 case DW_LANG_Cobol85
:
7658 cu
->language
= language_minimal
;
7661 cu
->language_defn
= language_def (cu
->language
);
7664 /* Return the named attribute or NULL if not there. */
7666 static struct attribute
*
7667 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7670 struct attribute
*spec
= NULL
;
7672 for (i
= 0; i
< die
->num_attrs
; ++i
)
7674 if (die
->attrs
[i
].name
== name
)
7675 return &die
->attrs
[i
];
7676 if (die
->attrs
[i
].name
== DW_AT_specification
7677 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7678 spec
= &die
->attrs
[i
];
7683 die
= follow_die_ref (die
, spec
, &cu
);
7684 return dwarf2_attr (die
, name
, cu
);
7690 /* Return the named attribute or NULL if not there,
7691 but do not follow DW_AT_specification, etc.
7692 This is for use in contexts where we're reading .debug_types dies.
7693 Following DW_AT_specification, DW_AT_abstract_origin will take us
7694 back up the chain, and we want to go down. */
7696 static struct attribute
*
7697 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7698 struct dwarf2_cu
*cu
)
7702 for (i
= 0; i
< die
->num_attrs
; ++i
)
7703 if (die
->attrs
[i
].name
== name
)
7704 return &die
->attrs
[i
];
7709 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7710 and holds a non-zero value. This function should only be used for
7711 DW_FORM_flag or DW_FORM_flag_present attributes. */
7714 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7716 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7718 return (attr
&& DW_UNSND (attr
));
7722 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7724 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7725 which value is non-zero. However, we have to be careful with
7726 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7727 (via dwarf2_flag_true_p) follows this attribute. So we may
7728 end up accidently finding a declaration attribute that belongs
7729 to a different DIE referenced by the specification attribute,
7730 even though the given DIE does not have a declaration attribute. */
7731 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7732 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7735 /* Return the die giving the specification for DIE, if there is
7736 one. *SPEC_CU is the CU containing DIE on input, and the CU
7737 containing the return value on output. If there is no
7738 specification, but there is an abstract origin, that is
7741 static struct die_info
*
7742 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7744 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7747 if (spec_attr
== NULL
)
7748 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7750 if (spec_attr
== NULL
)
7753 return follow_die_ref (die
, spec_attr
, spec_cu
);
7756 /* Free the line_header structure *LH, and any arrays and strings it
7759 free_line_header (struct line_header
*lh
)
7761 if (lh
->standard_opcode_lengths
)
7762 xfree (lh
->standard_opcode_lengths
);
7764 /* Remember that all the lh->file_names[i].name pointers are
7765 pointers into debug_line_buffer, and don't need to be freed. */
7767 xfree (lh
->file_names
);
7769 /* Similarly for the include directory names. */
7770 if (lh
->include_dirs
)
7771 xfree (lh
->include_dirs
);
7777 /* Add an entry to LH's include directory table. */
7779 add_include_dir (struct line_header
*lh
, char *include_dir
)
7781 /* Grow the array if necessary. */
7782 if (lh
->include_dirs_size
== 0)
7784 lh
->include_dirs_size
= 1; /* for testing */
7785 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7786 * sizeof (*lh
->include_dirs
));
7788 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7790 lh
->include_dirs_size
*= 2;
7791 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7792 (lh
->include_dirs_size
7793 * sizeof (*lh
->include_dirs
)));
7796 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7800 /* Add an entry to LH's file name table. */
7802 add_file_name (struct line_header
*lh
,
7804 unsigned int dir_index
,
7805 unsigned int mod_time
,
7806 unsigned int length
)
7808 struct file_entry
*fe
;
7810 /* Grow the array if necessary. */
7811 if (lh
->file_names_size
== 0)
7813 lh
->file_names_size
= 1; /* for testing */
7814 lh
->file_names
= xmalloc (lh
->file_names_size
7815 * sizeof (*lh
->file_names
));
7817 else if (lh
->num_file_names
>= lh
->file_names_size
)
7819 lh
->file_names_size
*= 2;
7820 lh
->file_names
= xrealloc (lh
->file_names
,
7821 (lh
->file_names_size
7822 * sizeof (*lh
->file_names
)));
7825 fe
= &lh
->file_names
[lh
->num_file_names
++];
7827 fe
->dir_index
= dir_index
;
7828 fe
->mod_time
= mod_time
;
7829 fe
->length
= length
;
7835 /* Read the statement program header starting at OFFSET in
7836 .debug_line, according to the endianness of ABFD. Return a pointer
7837 to a struct line_header, allocated using xmalloc.
7839 NOTE: the strings in the include directory and file name tables of
7840 the returned object point into debug_line_buffer, and must not be
7842 static struct line_header
*
7843 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7844 struct dwarf2_cu
*cu
)
7846 struct cleanup
*back_to
;
7847 struct line_header
*lh
;
7849 unsigned int bytes_read
, offset_size
;
7851 char *cur_dir
, *cur_file
;
7853 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
7854 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7856 complaint (&symfile_complaints
, _("missing .debug_line section"));
7860 /* Make sure that at least there's room for the total_length field.
7861 That could be 12 bytes long, but we're just going to fudge that. */
7862 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7864 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7868 lh
= xmalloc (sizeof (*lh
));
7869 memset (lh
, 0, sizeof (*lh
));
7870 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7873 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7875 /* Read in the header. */
7877 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7878 &bytes_read
, &offset_size
);
7879 line_ptr
+= bytes_read
;
7880 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7881 + dwarf2_per_objfile
->line
.size
))
7883 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7886 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7887 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7889 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7890 line_ptr
+= offset_size
;
7891 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7893 if (lh
->version
>= 4)
7895 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
7899 lh
->maximum_ops_per_instruction
= 1;
7901 if (lh
->maximum_ops_per_instruction
== 0)
7903 lh
->maximum_ops_per_instruction
= 1;
7904 complaint (&symfile_complaints
,
7905 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
7908 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7910 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7912 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7914 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7916 lh
->standard_opcode_lengths
7917 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7919 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7920 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7922 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7926 /* Read directory table. */
7927 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7929 line_ptr
+= bytes_read
;
7930 add_include_dir (lh
, cur_dir
);
7932 line_ptr
+= bytes_read
;
7934 /* Read file name table. */
7935 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7937 unsigned int dir_index
, mod_time
, length
;
7939 line_ptr
+= bytes_read
;
7940 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7941 line_ptr
+= bytes_read
;
7942 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7943 line_ptr
+= bytes_read
;
7944 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7945 line_ptr
+= bytes_read
;
7947 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7949 line_ptr
+= bytes_read
;
7950 lh
->statement_program_start
= line_ptr
;
7952 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7953 + dwarf2_per_objfile
->line
.size
))
7954 complaint (&symfile_complaints
,
7955 _("line number info header doesn't fit in `.debug_line' section"));
7957 discard_cleanups (back_to
);
7961 /* This function exists to work around a bug in certain compilers
7962 (particularly GCC 2.95), in which the first line number marker of a
7963 function does not show up until after the prologue, right before
7964 the second line number marker. This function shifts ADDRESS down
7965 to the beginning of the function if necessary, and is called on
7966 addresses passed to record_line. */
7969 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7971 struct function_range
*fn
;
7973 /* Find the function_range containing address. */
7978 cu
->cached_fn
= cu
->first_fn
;
7982 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7988 while (fn
&& fn
!= cu
->cached_fn
)
7989 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7999 if (address
!= fn
->lowpc
)
8000 complaint (&symfile_complaints
,
8001 _("misplaced first line number at 0x%lx for '%s'"),
8002 (unsigned long) address
, fn
->name
);
8007 /* Decode the Line Number Program (LNP) for the given line_header
8008 structure and CU. The actual information extracted and the type
8009 of structures created from the LNP depends on the value of PST.
8011 1. If PST is NULL, then this procedure uses the data from the program
8012 to create all necessary symbol tables, and their linetables.
8013 The compilation directory of the file is passed in COMP_DIR,
8014 and must not be NULL.
8016 2. If PST is not NULL, this procedure reads the program to determine
8017 the list of files included by the unit represented by PST, and
8018 builds all the associated partial symbol tables. In this case,
8019 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8020 is not used to compute the full name of the symtab, and therefore
8021 omitting it when building the partial symtab does not introduce
8022 the potential for inconsistency - a partial symtab and its associated
8023 symbtab having a different fullname -). */
8026 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
8027 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
8029 gdb_byte
*line_ptr
, *extended_end
;
8031 unsigned int bytes_read
, extended_len
;
8032 unsigned char op_code
, extended_op
, adj_opcode
;
8034 struct objfile
*objfile
= cu
->objfile
;
8035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8036 const int decode_for_pst_p
= (pst
!= NULL
);
8037 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
8039 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8041 line_ptr
= lh
->statement_program_start
;
8042 line_end
= lh
->statement_program_end
;
8044 /* Read the statement sequences until there's nothing left. */
8045 while (line_ptr
< line_end
)
8047 /* state machine registers */
8048 CORE_ADDR address
= 0;
8049 unsigned int file
= 1;
8050 unsigned int line
= 1;
8051 unsigned int column
= 0;
8052 int is_stmt
= lh
->default_is_stmt
;
8053 int basic_block
= 0;
8054 int end_sequence
= 0;
8056 unsigned char op_index
= 0;
8058 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8060 /* Start a subfile for the current file of the state machine. */
8061 /* lh->include_dirs and lh->file_names are 0-based, but the
8062 directory and file name numbers in the statement program
8064 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8068 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8070 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8073 /* Decode the table. */
8074 while (!end_sequence
)
8076 op_code
= read_1_byte (abfd
, line_ptr
);
8078 if (line_ptr
> line_end
)
8080 dwarf2_debug_line_missing_end_sequence_complaint ();
8084 if (op_code
>= lh
->opcode_base
)
8086 /* Special operand. */
8087 adj_opcode
= op_code
- lh
->opcode_base
;
8088 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
8089 / lh
->maximum_ops_per_instruction
)
8090 * lh
->minimum_instruction_length
);
8091 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
8092 % lh
->maximum_ops_per_instruction
);
8093 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8094 if (lh
->num_file_names
< file
|| file
== 0)
8095 dwarf2_debug_line_missing_file_complaint ();
8096 /* For now we ignore lines not starting on an
8097 instruction boundary. */
8098 else if (op_index
== 0)
8100 lh
->file_names
[file
- 1].included_p
= 1;
8101 if (!decode_for_pst_p
&& is_stmt
)
8103 if (last_subfile
!= current_subfile
)
8105 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8107 record_line (last_subfile
, 0, addr
);
8108 last_subfile
= current_subfile
;
8110 /* Append row to matrix using current values. */
8111 addr
= check_cu_functions (address
, cu
);
8112 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8113 record_line (current_subfile
, line
, addr
);
8118 else switch (op_code
)
8120 case DW_LNS_extended_op
:
8121 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8122 line_ptr
+= bytes_read
;
8123 extended_end
= line_ptr
+ extended_len
;
8124 extended_op
= read_1_byte (abfd
, line_ptr
);
8126 switch (extended_op
)
8128 case DW_LNE_end_sequence
:
8131 case DW_LNE_set_address
:
8132 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8134 line_ptr
+= bytes_read
;
8135 address
+= baseaddr
;
8137 case DW_LNE_define_file
:
8140 unsigned int dir_index
, mod_time
, length
;
8142 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8143 line_ptr
+= bytes_read
;
8145 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8146 line_ptr
+= bytes_read
;
8148 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8149 line_ptr
+= bytes_read
;
8151 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8152 line_ptr
+= bytes_read
;
8153 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8156 case DW_LNE_set_discriminator
:
8157 /* The discriminator is not interesting to the debugger;
8159 line_ptr
= extended_end
;
8162 complaint (&symfile_complaints
,
8163 _("mangled .debug_line section"));
8166 /* Make sure that we parsed the extended op correctly. If e.g.
8167 we expected a different address size than the producer used,
8168 we may have read the wrong number of bytes. */
8169 if (line_ptr
!= extended_end
)
8171 complaint (&symfile_complaints
,
8172 _("mangled .debug_line section"));
8177 if (lh
->num_file_names
< file
|| file
== 0)
8178 dwarf2_debug_line_missing_file_complaint ();
8181 lh
->file_names
[file
- 1].included_p
= 1;
8182 if (!decode_for_pst_p
&& is_stmt
)
8184 if (last_subfile
!= current_subfile
)
8186 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8188 record_line (last_subfile
, 0, addr
);
8189 last_subfile
= current_subfile
;
8191 addr
= check_cu_functions (address
, cu
);
8192 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8193 record_line (current_subfile
, line
, addr
);
8198 case DW_LNS_advance_pc
:
8201 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8203 address
+= (((op_index
+ adjust
)
8204 / lh
->maximum_ops_per_instruction
)
8205 * lh
->minimum_instruction_length
);
8206 op_index
= ((op_index
+ adjust
)
8207 % lh
->maximum_ops_per_instruction
);
8208 line_ptr
+= bytes_read
;
8211 case DW_LNS_advance_line
:
8212 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8213 line_ptr
+= bytes_read
;
8215 case DW_LNS_set_file
:
8217 /* The arrays lh->include_dirs and lh->file_names are
8218 0-based, but the directory and file name numbers in
8219 the statement program are 1-based. */
8220 struct file_entry
*fe
;
8223 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8224 line_ptr
+= bytes_read
;
8225 if (lh
->num_file_names
< file
|| file
== 0)
8226 dwarf2_debug_line_missing_file_complaint ();
8229 fe
= &lh
->file_names
[file
- 1];
8231 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8232 if (!decode_for_pst_p
)
8234 last_subfile
= current_subfile
;
8235 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8240 case DW_LNS_set_column
:
8241 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8242 line_ptr
+= bytes_read
;
8244 case DW_LNS_negate_stmt
:
8245 is_stmt
= (!is_stmt
);
8247 case DW_LNS_set_basic_block
:
8250 /* Add to the address register of the state machine the
8251 address increment value corresponding to special opcode
8252 255. I.e., this value is scaled by the minimum
8253 instruction length since special opcode 255 would have
8254 scaled the the increment. */
8255 case DW_LNS_const_add_pc
:
8257 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
8259 address
+= (((op_index
+ adjust
)
8260 / lh
->maximum_ops_per_instruction
)
8261 * lh
->minimum_instruction_length
);
8262 op_index
= ((op_index
+ adjust
)
8263 % lh
->maximum_ops_per_instruction
);
8266 case DW_LNS_fixed_advance_pc
:
8267 address
+= read_2_bytes (abfd
, line_ptr
);
8273 /* Unknown standard opcode, ignore it. */
8276 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8278 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8279 line_ptr
+= bytes_read
;
8284 if (lh
->num_file_names
< file
|| file
== 0)
8285 dwarf2_debug_line_missing_file_complaint ();
8288 lh
->file_names
[file
- 1].included_p
= 1;
8289 if (!decode_for_pst_p
)
8291 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8292 record_line (current_subfile
, 0, addr
);
8297 if (decode_for_pst_p
)
8301 /* Now that we're done scanning the Line Header Program, we can
8302 create the psymtab of each included file. */
8303 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8304 if (lh
->file_names
[file_index
].included_p
== 1)
8306 const struct file_entry fe
= lh
->file_names
[file_index
];
8307 char *include_name
= fe
.name
;
8308 char *dir_name
= NULL
;
8309 char *pst_filename
= pst
->filename
;
8312 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8314 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8316 include_name
= concat (dir_name
, SLASH_STRING
,
8317 include_name
, (char *)NULL
);
8318 make_cleanup (xfree
, include_name
);
8321 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8323 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8324 pst_filename
, (char *)NULL
);
8325 make_cleanup (xfree
, pst_filename
);
8328 if (strcmp (include_name
, pst_filename
) != 0)
8329 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8334 /* Make sure a symtab is created for every file, even files
8335 which contain only variables (i.e. no code with associated
8339 struct file_entry
*fe
;
8341 for (i
= 0; i
< lh
->num_file_names
; i
++)
8345 fe
= &lh
->file_names
[i
];
8347 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8348 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8350 /* Skip the main file; we don't need it, and it must be
8351 allocated last, so that it will show up before the
8352 non-primary symtabs in the objfile's symtab list. */
8353 if (current_subfile
== first_subfile
)
8356 if (current_subfile
->symtab
== NULL
)
8357 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8359 fe
->symtab
= current_subfile
->symtab
;
8364 /* Start a subfile for DWARF. FILENAME is the name of the file and
8365 DIRNAME the name of the source directory which contains FILENAME
8366 or NULL if not known. COMP_DIR is the compilation directory for the
8367 linetable's compilation unit or NULL if not known.
8368 This routine tries to keep line numbers from identical absolute and
8369 relative file names in a common subfile.
8371 Using the `list' example from the GDB testsuite, which resides in
8372 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8373 of /srcdir/list0.c yields the following debugging information for list0.c:
8375 DW_AT_name: /srcdir/list0.c
8376 DW_AT_comp_dir: /compdir
8377 files.files[0].name: list0.h
8378 files.files[0].dir: /srcdir
8379 files.files[1].name: list0.c
8380 files.files[1].dir: /srcdir
8382 The line number information for list0.c has to end up in a single
8383 subfile, so that `break /srcdir/list0.c:1' works as expected.
8384 start_subfile will ensure that this happens provided that we pass the
8385 concatenation of files.files[1].dir and files.files[1].name as the
8389 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8393 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8394 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8395 second argument to start_subfile. To be consistent, we do the
8396 same here. In order not to lose the line information directory,
8397 we concatenate it to the filename when it makes sense.
8398 Note that the Dwarf3 standard says (speaking of filenames in line
8399 information): ``The directory index is ignored for file names
8400 that represent full path names''. Thus ignoring dirname in the
8401 `else' branch below isn't an issue. */
8403 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8404 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8406 fullname
= filename
;
8408 start_subfile (fullname
, comp_dir
);
8410 if (fullname
!= filename
)
8415 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8416 struct dwarf2_cu
*cu
)
8418 struct objfile
*objfile
= cu
->objfile
;
8419 struct comp_unit_head
*cu_header
= &cu
->header
;
8421 /* NOTE drow/2003-01-30: There used to be a comment and some special
8422 code here to turn a symbol with DW_AT_external and a
8423 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8424 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8425 with some versions of binutils) where shared libraries could have
8426 relocations against symbols in their debug information - the
8427 minimal symbol would have the right address, but the debug info
8428 would not. It's no longer necessary, because we will explicitly
8429 apply relocations when we read in the debug information now. */
8431 /* A DW_AT_location attribute with no contents indicates that a
8432 variable has been optimized away. */
8433 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8435 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8439 /* Handle one degenerate form of location expression specially, to
8440 preserve GDB's previous behavior when section offsets are
8441 specified. If this is just a DW_OP_addr then mark this symbol
8444 if (attr_form_is_block (attr
)
8445 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8446 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8450 SYMBOL_VALUE_ADDRESS (sym
) =
8451 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8452 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8453 fixup_symbol_section (sym
, objfile
);
8454 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8455 SYMBOL_SECTION (sym
));
8459 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8460 expression evaluator, and use LOC_COMPUTED only when necessary
8461 (i.e. when the value of a register or memory location is
8462 referenced, or a thread-local block, etc.). Then again, it might
8463 not be worthwhile. I'm assuming that it isn't unless performance
8464 or memory numbers show me otherwise. */
8466 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8467 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8470 /* Given a pointer to a DWARF information entry, figure out if we need
8471 to make a symbol table entry for it, and if so, create a new entry
8472 and return a pointer to it.
8473 If TYPE is NULL, determine symbol type from the die, otherwise
8474 used the passed type. */
8476 static struct symbol
*
8477 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8479 struct objfile
*objfile
= cu
->objfile
;
8480 struct symbol
*sym
= NULL
;
8482 struct attribute
*attr
= NULL
;
8483 struct attribute
*attr2
= NULL
;
8485 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8487 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8489 name
= dwarf2_name (die
, cu
);
8492 const char *linkagename
;
8494 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8495 sizeof (struct symbol
));
8496 OBJSTAT (objfile
, n_syms
++);
8497 memset (sym
, 0, sizeof (struct symbol
));
8499 /* Cache this symbol's name and the name's demangled form (if any). */
8500 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8501 linkagename
= dwarf2_physname (name
, die
, cu
);
8502 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8504 /* Default assumptions.
8505 Use the passed type or decode it from the die. */
8506 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8507 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8509 SYMBOL_TYPE (sym
) = type
;
8511 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8512 attr
= dwarf2_attr (die
,
8513 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8517 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8520 attr
= dwarf2_attr (die
,
8521 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8525 int file_index
= DW_UNSND (attr
);
8527 if (cu
->line_header
== NULL
8528 || file_index
> cu
->line_header
->num_file_names
)
8529 complaint (&symfile_complaints
,
8530 _("file index out of range"));
8531 else if (file_index
> 0)
8533 struct file_entry
*fe
;
8535 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8536 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8543 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8546 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8548 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8550 case DW_TAG_subprogram
:
8551 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8553 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8554 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8555 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8556 || cu
->language
== language_ada
)
8558 /* Subprograms marked external are stored as a global symbol.
8559 Ada subprograms, whether marked external or not, are always
8560 stored as a global symbol, because we want to be able to
8561 access them globally. For instance, we want to be able
8562 to break on a nested subprogram without having to
8563 specify the context. */
8564 add_symbol_to_list (sym
, &global_symbols
);
8568 add_symbol_to_list (sym
, cu
->list_in_scope
);
8571 case DW_TAG_inlined_subroutine
:
8572 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8574 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8575 SYMBOL_INLINED (sym
) = 1;
8576 /* Do not add the symbol to any lists. It will be found via
8577 BLOCK_FUNCTION from the blockvector. */
8579 case DW_TAG_variable
:
8580 /* Compilation with minimal debug info may result in variables
8581 with missing type entries. Change the misleading `void' type
8582 to something sensible. */
8583 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8585 = objfile_type (objfile
)->nodebug_data_symbol
;
8587 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8590 dwarf2_const_value (attr
, sym
, cu
);
8591 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8592 if (attr2
&& (DW_UNSND (attr2
) != 0))
8593 add_symbol_to_list (sym
, &global_symbols
);
8595 add_symbol_to_list (sym
, cu
->list_in_scope
);
8598 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8601 var_decode_location (attr
, sym
, cu
);
8602 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8603 if (attr2
&& (DW_UNSND (attr2
) != 0))
8605 struct pending
**list_to_add
;
8607 /* A variable with DW_AT_external is never static,
8608 but it may be block-scoped. */
8609 list_to_add
= (cu
->list_in_scope
== &file_symbols
8610 ? &global_symbols
: cu
->list_in_scope
);
8611 add_symbol_to_list (sym
, list_to_add
);
8614 add_symbol_to_list (sym
, cu
->list_in_scope
);
8618 /* We do not know the address of this symbol.
8619 If it is an external symbol and we have type information
8620 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8621 The address of the variable will then be determined from
8622 the minimal symbol table whenever the variable is
8624 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8625 if (attr2
&& (DW_UNSND (attr2
) != 0)
8626 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8628 struct pending
**list_to_add
;
8630 /* A variable with DW_AT_external is never static, but it
8631 may be block-scoped. */
8632 list_to_add
= (cu
->list_in_scope
== &file_symbols
8633 ? &global_symbols
: cu
->list_in_scope
);
8635 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8636 add_symbol_to_list (sym
, list_to_add
);
8638 else if (!die_is_declaration (die
, cu
))
8640 /* Use the default LOC_OPTIMIZED_OUT class. */
8641 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8642 add_symbol_to_list (sym
, cu
->list_in_scope
);
8646 case DW_TAG_formal_parameter
:
8647 /* If we are inside a function, mark this as an argument. If
8648 not, we might be looking at an argument to an inlined function
8649 when we do not have enough information to show inlined frames;
8650 pretend it's a local variable in that case so that the user can
8652 if (context_stack_depth
> 0
8653 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8654 SYMBOL_IS_ARGUMENT (sym
) = 1;
8655 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8658 var_decode_location (attr
, sym
, cu
);
8660 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8663 dwarf2_const_value (attr
, sym
, cu
);
8665 add_symbol_to_list (sym
, cu
->list_in_scope
);
8667 case DW_TAG_unspecified_parameters
:
8668 /* From varargs functions; gdb doesn't seem to have any
8669 interest in this information, so just ignore it for now.
8672 case DW_TAG_class_type
:
8673 case DW_TAG_interface_type
:
8674 case DW_TAG_structure_type
:
8675 case DW_TAG_union_type
:
8676 case DW_TAG_set_type
:
8677 case DW_TAG_enumeration_type
:
8678 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8679 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8681 /* Make sure that the symbol includes appropriate enclosing
8682 classes/namespaces in its name. These are calculated in
8683 read_structure_type, and the correct name is saved in
8686 if (cu
->language
== language_cplus
8687 || cu
->language
== language_java
)
8689 struct type
*type
= SYMBOL_TYPE (sym
);
8691 if (TYPE_TAG_NAME (type
) != NULL
)
8693 /* FIXME: carlton/2003-11-10: Should this use
8694 SYMBOL_SET_NAMES instead? (The same problem also
8695 arises further down in this function.) */
8696 /* The type's name is already allocated along with
8697 this objfile, so we don't need to duplicate it
8699 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8704 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8705 really ever be static objects: otherwise, if you try
8706 to, say, break of a class's method and you're in a file
8707 which doesn't mention that class, it won't work unless
8708 the check for all static symbols in lookup_symbol_aux
8709 saves you. See the OtherFileClass tests in
8710 gdb.c++/namespace.exp. */
8712 struct pending
**list_to_add
;
8714 list_to_add
= (cu
->list_in_scope
== &file_symbols
8715 && (cu
->language
== language_cplus
8716 || cu
->language
== language_java
)
8717 ? &global_symbols
: cu
->list_in_scope
);
8719 add_symbol_to_list (sym
, list_to_add
);
8721 /* The semantics of C++ state that "struct foo { ... }" also
8722 defines a typedef for "foo". A Java class declaration also
8723 defines a typedef for the class. */
8724 if (cu
->language
== language_cplus
8725 || cu
->language
== language_java
8726 || cu
->language
== language_ada
)
8728 /* The symbol's name is already allocated along with
8729 this objfile, so we don't need to duplicate it for
8731 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8732 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8736 case DW_TAG_typedef
:
8737 SYMBOL_LINKAGE_NAME (sym
)
8738 = (char *) dwarf2_full_name (name
, die
, cu
);
8739 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8740 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8741 add_symbol_to_list (sym
, cu
->list_in_scope
);
8743 case DW_TAG_base_type
:
8744 case DW_TAG_subrange_type
:
8745 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8746 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8747 add_symbol_to_list (sym
, cu
->list_in_scope
);
8749 case DW_TAG_enumerator
:
8750 SYMBOL_LINKAGE_NAME (sym
)
8751 = (char *) dwarf2_full_name (name
, die
, cu
);
8752 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8755 dwarf2_const_value (attr
, sym
, cu
);
8758 /* NOTE: carlton/2003-11-10: See comment above in the
8759 DW_TAG_class_type, etc. block. */
8761 struct pending
**list_to_add
;
8763 list_to_add
= (cu
->list_in_scope
== &file_symbols
8764 && (cu
->language
== language_cplus
8765 || cu
->language
== language_java
)
8766 ? &global_symbols
: cu
->list_in_scope
);
8768 add_symbol_to_list (sym
, list_to_add
);
8771 case DW_TAG_namespace
:
8772 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8773 add_symbol_to_list (sym
, &global_symbols
);
8776 /* Not a tag we recognize. Hopefully we aren't processing
8777 trash data, but since we must specifically ignore things
8778 we don't recognize, there is nothing else we should do at
8780 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8781 dwarf_tag_name (die
->tag
));
8785 /* For the benefit of old versions of GCC, check for anonymous
8786 namespaces based on the demangled name. */
8787 if (!processing_has_namespace_info
8788 && cu
->language
== language_cplus
)
8789 cp_scan_for_anonymous_namespaces (sym
);
8794 /* Copy constant value from an attribute to a symbol. */
8797 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8798 struct dwarf2_cu
*cu
)
8800 struct objfile
*objfile
= cu
->objfile
;
8801 struct comp_unit_head
*cu_header
= &cu
->header
;
8802 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8803 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8804 struct dwarf_block
*blk
;
8809 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8810 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8811 cu_header
->addr_size
,
8812 TYPE_LENGTH (SYMBOL_TYPE
8814 SYMBOL_VALUE_BYTES (sym
) =
8815 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8816 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8817 it's body - store_unsigned_integer. */
8818 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8819 byte_order
, DW_ADDR (attr
));
8820 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8822 case DW_FORM_string
:
8824 /* DW_STRING is already allocated on the obstack, point directly
8826 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8827 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8829 case DW_FORM_block1
:
8830 case DW_FORM_block2
:
8831 case DW_FORM_block4
:
8833 case DW_FORM_exprloc
:
8834 blk
= DW_BLOCK (attr
);
8835 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8836 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8838 TYPE_LENGTH (SYMBOL_TYPE
8840 SYMBOL_VALUE_BYTES (sym
) =
8841 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8842 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8843 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8846 /* The DW_AT_const_value attributes are supposed to carry the
8847 symbol's value "represented as it would be on the target
8848 architecture." By the time we get here, it's already been
8849 converted to host endianness, so we just need to sign- or
8850 zero-extend it as appropriate. */
8852 dwarf2_const_value_data (attr
, sym
, 8);
8855 dwarf2_const_value_data (attr
, sym
, 16);
8858 dwarf2_const_value_data (attr
, sym
, 32);
8861 dwarf2_const_value_data (attr
, sym
, 64);
8865 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8866 SYMBOL_CLASS (sym
) = LOC_CONST
;
8870 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8871 SYMBOL_CLASS (sym
) = LOC_CONST
;
8875 complaint (&symfile_complaints
,
8876 _("unsupported const value attribute form: '%s'"),
8877 dwarf_form_name (attr
->form
));
8878 SYMBOL_VALUE (sym
) = 0;
8879 SYMBOL_CLASS (sym
) = LOC_CONST
;
8885 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8886 or zero-extend it as appropriate for the symbol's type. */
8888 dwarf2_const_value_data (struct attribute
*attr
,
8892 LONGEST l
= DW_UNSND (attr
);
8894 if (bits
< sizeof (l
) * 8)
8896 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8897 l
&= ((LONGEST
) 1 << bits
) - 1;
8899 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8902 SYMBOL_VALUE (sym
) = l
;
8903 SYMBOL_CLASS (sym
) = LOC_CONST
;
8907 /* Return the type of the die in question using its DW_AT_type attribute. */
8909 static struct type
*
8910 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8912 struct attribute
*type_attr
;
8913 struct die_info
*type_die
;
8915 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8918 /* A missing DW_AT_type represents a void type. */
8919 return objfile_type (cu
->objfile
)->builtin_void
;
8922 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8924 return tag_type_to_type (type_die
, cu
);
8927 /* True iff CU's producer generates GNAT Ada auxiliary information
8928 that allows to find parallel types through that information instead
8929 of having to do expensive parallel lookups by type name. */
8932 need_gnat_info (struct dwarf2_cu
*cu
)
8934 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8935 of GNAT produces this auxiliary information, without any indication
8936 that it is produced. Part of enhancing the FSF version of GNAT
8937 to produce that information will be to put in place an indicator
8938 that we can use in order to determine whether the descriptive type
8939 info is available or not. One suggestion that has been made is
8940 to use a new attribute, attached to the CU die. For now, assume
8941 that the descriptive type info is not available. */
8946 /* Return the auxiliary type of the die in question using its
8947 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8948 attribute is not present. */
8950 static struct type
*
8951 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8953 struct attribute
*type_attr
;
8954 struct die_info
*type_die
;
8956 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
8960 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8961 return tag_type_to_type (type_die
, cu
);
8964 /* If DIE has a descriptive_type attribute, then set the TYPE's
8965 descriptive type accordingly. */
8968 set_descriptive_type (struct type
*type
, struct die_info
*die
,
8969 struct dwarf2_cu
*cu
)
8971 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
8973 if (descriptive_type
)
8975 ALLOCATE_GNAT_AUX_TYPE (type
);
8976 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
8980 /* Return the containing type of the die in question using its
8981 DW_AT_containing_type attribute. */
8983 static struct type
*
8984 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8986 struct attribute
*type_attr
;
8987 struct die_info
*type_die
;
8989 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8991 error (_("Dwarf Error: Problem turning containing type into gdb type "
8992 "[in module %s]"), cu
->objfile
->name
);
8994 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8995 return tag_type_to_type (type_die
, cu
);
8998 static struct type
*
8999 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9001 struct type
*this_type
;
9003 this_type
= read_type_die (die
, cu
);
9006 dump_die_for_error (die
);
9007 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
9013 static struct type
*
9014 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9016 struct type
*this_type
;
9018 this_type
= get_die_type (die
, cu
);
9024 case DW_TAG_class_type
:
9025 case DW_TAG_interface_type
:
9026 case DW_TAG_structure_type
:
9027 case DW_TAG_union_type
:
9028 this_type
= read_structure_type (die
, cu
);
9030 case DW_TAG_enumeration_type
:
9031 this_type
= read_enumeration_type (die
, cu
);
9033 case DW_TAG_subprogram
:
9034 case DW_TAG_subroutine_type
:
9035 case DW_TAG_inlined_subroutine
:
9036 this_type
= read_subroutine_type (die
, cu
);
9038 case DW_TAG_array_type
:
9039 this_type
= read_array_type (die
, cu
);
9041 case DW_TAG_set_type
:
9042 this_type
= read_set_type (die
, cu
);
9044 case DW_TAG_pointer_type
:
9045 this_type
= read_tag_pointer_type (die
, cu
);
9047 case DW_TAG_ptr_to_member_type
:
9048 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9050 case DW_TAG_reference_type
:
9051 this_type
= read_tag_reference_type (die
, cu
);
9053 case DW_TAG_const_type
:
9054 this_type
= read_tag_const_type (die
, cu
);
9056 case DW_TAG_volatile_type
:
9057 this_type
= read_tag_volatile_type (die
, cu
);
9059 case DW_TAG_string_type
:
9060 this_type
= read_tag_string_type (die
, cu
);
9062 case DW_TAG_typedef
:
9063 this_type
= read_typedef (die
, cu
);
9065 case DW_TAG_subrange_type
:
9066 this_type
= read_subrange_type (die
, cu
);
9068 case DW_TAG_base_type
:
9069 this_type
= read_base_type (die
, cu
);
9071 case DW_TAG_unspecified_type
:
9072 this_type
= read_unspecified_type (die
, cu
);
9074 case DW_TAG_namespace
:
9075 this_type
= read_namespace_type (die
, cu
);
9078 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9079 dwarf_tag_name (die
->tag
));
9086 /* Return the name of the namespace/class that DIE is defined within,
9087 or "" if we can't tell. The caller should not xfree the result.
9089 For example, if we're within the method foo() in the following
9099 then determine_prefix on foo's die will return "N::C". */
9102 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9104 struct die_info
*parent
, *spec_die
;
9105 struct dwarf2_cu
*spec_cu
;
9106 struct type
*parent_type
;
9108 if (cu
->language
!= language_cplus
9109 && cu
->language
!= language_java
)
9112 /* We have to be careful in the presence of DW_AT_specification.
9113 For example, with GCC 3.4, given the code
9117 // Definition of N::foo.
9121 then we'll have a tree of DIEs like this:
9123 1: DW_TAG_compile_unit
9124 2: DW_TAG_namespace // N
9125 3: DW_TAG_subprogram // declaration of N::foo
9126 4: DW_TAG_subprogram // definition of N::foo
9127 DW_AT_specification // refers to die #3
9129 Thus, when processing die #4, we have to pretend that we're in
9130 the context of its DW_AT_specification, namely the contex of die
9133 spec_die
= die_specification (die
, &spec_cu
);
9134 if (spec_die
== NULL
)
9135 parent
= die
->parent
;
9138 parent
= spec_die
->parent
;
9145 switch (parent
->tag
)
9147 case DW_TAG_namespace
:
9148 parent_type
= read_type_die (parent
, cu
);
9149 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9150 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9151 Work around this problem here. */
9152 if (cu
->language
== language_cplus
9153 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9155 /* We give a name to even anonymous namespaces. */
9156 return TYPE_TAG_NAME (parent_type
);
9157 case DW_TAG_class_type
:
9158 case DW_TAG_interface_type
:
9159 case DW_TAG_structure_type
:
9160 case DW_TAG_union_type
:
9161 parent_type
= read_type_die (parent
, cu
);
9162 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9163 return TYPE_TAG_NAME (parent_type
);
9165 /* An anonymous structure is only allowed non-static data
9166 members; no typedefs, no member functions, et cetera.
9167 So it does not need a prefix. */
9170 return determine_prefix (parent
, cu
);
9174 /* Return a newly-allocated string formed by concatenating PREFIX and
9175 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9176 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9177 perform an obconcat, otherwise allocate storage for the result. The CU argument
9178 is used to determine the language and hence, the appropriate separator. */
9180 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9183 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9184 struct dwarf2_cu
*cu
)
9188 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9190 else if (cu
->language
== language_java
)
9202 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9204 strcpy (retval
, prefix
);
9205 strcat (retval
, sep
);
9206 strcat (retval
, suffix
);
9211 /* We have an obstack. */
9212 return obconcat (obs
, prefix
, sep
, suffix
, (char *) NULL
);
9216 /* Return sibling of die, NULL if no sibling. */
9218 static struct die_info
*
9219 sibling_die (struct die_info
*die
)
9221 return die
->sibling
;
9224 /* Get name of a die, return NULL if not found. */
9227 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9228 struct obstack
*obstack
)
9230 if (name
&& cu
->language
== language_cplus
)
9232 char *canon_name
= cp_canonicalize_string (name
);
9234 if (canon_name
!= NULL
)
9236 if (strcmp (canon_name
, name
) != 0)
9237 name
= obsavestring (canon_name
, strlen (canon_name
),
9246 /* Get name of a die, return NULL if not found. */
9249 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9251 struct attribute
*attr
;
9253 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9254 if (!attr
|| !DW_STRING (attr
))
9259 case DW_TAG_compile_unit
:
9260 /* Compilation units have a DW_AT_name that is a filename, not
9261 a source language identifier. */
9262 case DW_TAG_enumeration_type
:
9263 case DW_TAG_enumerator
:
9264 /* These tags always have simple identifiers already; no need
9265 to canonicalize them. */
9266 return DW_STRING (attr
);
9268 case DW_TAG_subprogram
:
9269 /* Java constructors will all be named "<init>", so return
9270 the class name when we see this special case. */
9271 if (cu
->language
== language_java
9272 && DW_STRING (attr
) != NULL
9273 && strcmp (DW_STRING (attr
), "<init>") == 0)
9275 struct dwarf2_cu
*spec_cu
= cu
;
9276 struct die_info
*spec_die
;
9278 /* GCJ will output '<init>' for Java constructor names.
9279 For this special case, return the name of the parent class. */
9281 /* GCJ may output suprogram DIEs with AT_specification set.
9282 If so, use the name of the specified DIE. */
9283 spec_die
= die_specification (die
, &spec_cu
);
9284 if (spec_die
!= NULL
)
9285 return dwarf2_name (spec_die
, spec_cu
);
9290 if (die
->tag
== DW_TAG_class_type
)
9291 return dwarf2_name (die
, cu
);
9293 while (die
->tag
!= DW_TAG_compile_unit
);
9297 case DW_TAG_class_type
:
9298 case DW_TAG_interface_type
:
9299 case DW_TAG_structure_type
:
9300 case DW_TAG_union_type
:
9301 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9302 structures or unions. These were of the form "._%d" in GCC 4.1,
9303 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9304 and GCC 4.4. We work around this problem by ignoring these. */
9305 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9306 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9314 if (!DW_STRING_IS_CANONICAL (attr
))
9317 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9318 &cu
->objfile
->objfile_obstack
);
9319 DW_STRING_IS_CANONICAL (attr
) = 1;
9321 return DW_STRING (attr
);
9324 /* Return the die that this die in an extension of, or NULL if there
9325 is none. *EXT_CU is the CU containing DIE on input, and the CU
9326 containing the return value on output. */
9328 static struct die_info
*
9329 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9331 struct attribute
*attr
;
9333 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9337 return follow_die_ref (die
, attr
, ext_cu
);
9340 /* Convert a DIE tag into its string name. */
9343 dwarf_tag_name (unsigned tag
)
9347 case DW_TAG_padding
:
9348 return "DW_TAG_padding";
9349 case DW_TAG_array_type
:
9350 return "DW_TAG_array_type";
9351 case DW_TAG_class_type
:
9352 return "DW_TAG_class_type";
9353 case DW_TAG_entry_point
:
9354 return "DW_TAG_entry_point";
9355 case DW_TAG_enumeration_type
:
9356 return "DW_TAG_enumeration_type";
9357 case DW_TAG_formal_parameter
:
9358 return "DW_TAG_formal_parameter";
9359 case DW_TAG_imported_declaration
:
9360 return "DW_TAG_imported_declaration";
9362 return "DW_TAG_label";
9363 case DW_TAG_lexical_block
:
9364 return "DW_TAG_lexical_block";
9366 return "DW_TAG_member";
9367 case DW_TAG_pointer_type
:
9368 return "DW_TAG_pointer_type";
9369 case DW_TAG_reference_type
:
9370 return "DW_TAG_reference_type";
9371 case DW_TAG_compile_unit
:
9372 return "DW_TAG_compile_unit";
9373 case DW_TAG_string_type
:
9374 return "DW_TAG_string_type";
9375 case DW_TAG_structure_type
:
9376 return "DW_TAG_structure_type";
9377 case DW_TAG_subroutine_type
:
9378 return "DW_TAG_subroutine_type";
9379 case DW_TAG_typedef
:
9380 return "DW_TAG_typedef";
9381 case DW_TAG_union_type
:
9382 return "DW_TAG_union_type";
9383 case DW_TAG_unspecified_parameters
:
9384 return "DW_TAG_unspecified_parameters";
9385 case DW_TAG_variant
:
9386 return "DW_TAG_variant";
9387 case DW_TAG_common_block
:
9388 return "DW_TAG_common_block";
9389 case DW_TAG_common_inclusion
:
9390 return "DW_TAG_common_inclusion";
9391 case DW_TAG_inheritance
:
9392 return "DW_TAG_inheritance";
9393 case DW_TAG_inlined_subroutine
:
9394 return "DW_TAG_inlined_subroutine";
9396 return "DW_TAG_module";
9397 case DW_TAG_ptr_to_member_type
:
9398 return "DW_TAG_ptr_to_member_type";
9399 case DW_TAG_set_type
:
9400 return "DW_TAG_set_type";
9401 case DW_TAG_subrange_type
:
9402 return "DW_TAG_subrange_type";
9403 case DW_TAG_with_stmt
:
9404 return "DW_TAG_with_stmt";
9405 case DW_TAG_access_declaration
:
9406 return "DW_TAG_access_declaration";
9407 case DW_TAG_base_type
:
9408 return "DW_TAG_base_type";
9409 case DW_TAG_catch_block
:
9410 return "DW_TAG_catch_block";
9411 case DW_TAG_const_type
:
9412 return "DW_TAG_const_type";
9413 case DW_TAG_constant
:
9414 return "DW_TAG_constant";
9415 case DW_TAG_enumerator
:
9416 return "DW_TAG_enumerator";
9417 case DW_TAG_file_type
:
9418 return "DW_TAG_file_type";
9420 return "DW_TAG_friend";
9421 case DW_TAG_namelist
:
9422 return "DW_TAG_namelist";
9423 case DW_TAG_namelist_item
:
9424 return "DW_TAG_namelist_item";
9425 case DW_TAG_packed_type
:
9426 return "DW_TAG_packed_type";
9427 case DW_TAG_subprogram
:
9428 return "DW_TAG_subprogram";
9429 case DW_TAG_template_type_param
:
9430 return "DW_TAG_template_type_param";
9431 case DW_TAG_template_value_param
:
9432 return "DW_TAG_template_value_param";
9433 case DW_TAG_thrown_type
:
9434 return "DW_TAG_thrown_type";
9435 case DW_TAG_try_block
:
9436 return "DW_TAG_try_block";
9437 case DW_TAG_variant_part
:
9438 return "DW_TAG_variant_part";
9439 case DW_TAG_variable
:
9440 return "DW_TAG_variable";
9441 case DW_TAG_volatile_type
:
9442 return "DW_TAG_volatile_type";
9443 case DW_TAG_dwarf_procedure
:
9444 return "DW_TAG_dwarf_procedure";
9445 case DW_TAG_restrict_type
:
9446 return "DW_TAG_restrict_type";
9447 case DW_TAG_interface_type
:
9448 return "DW_TAG_interface_type";
9449 case DW_TAG_namespace
:
9450 return "DW_TAG_namespace";
9451 case DW_TAG_imported_module
:
9452 return "DW_TAG_imported_module";
9453 case DW_TAG_unspecified_type
:
9454 return "DW_TAG_unspecified_type";
9455 case DW_TAG_partial_unit
:
9456 return "DW_TAG_partial_unit";
9457 case DW_TAG_imported_unit
:
9458 return "DW_TAG_imported_unit";
9459 case DW_TAG_condition
:
9460 return "DW_TAG_condition";
9461 case DW_TAG_shared_type
:
9462 return "DW_TAG_shared_type";
9463 case DW_TAG_type_unit
:
9464 return "DW_TAG_type_unit";
9465 case DW_TAG_MIPS_loop
:
9466 return "DW_TAG_MIPS_loop";
9467 case DW_TAG_HP_array_descriptor
:
9468 return "DW_TAG_HP_array_descriptor";
9469 case DW_TAG_format_label
:
9470 return "DW_TAG_format_label";
9471 case DW_TAG_function_template
:
9472 return "DW_TAG_function_template";
9473 case DW_TAG_class_template
:
9474 return "DW_TAG_class_template";
9475 case DW_TAG_GNU_BINCL
:
9476 return "DW_TAG_GNU_BINCL";
9477 case DW_TAG_GNU_EINCL
:
9478 return "DW_TAG_GNU_EINCL";
9479 case DW_TAG_upc_shared_type
:
9480 return "DW_TAG_upc_shared_type";
9481 case DW_TAG_upc_strict_type
:
9482 return "DW_TAG_upc_strict_type";
9483 case DW_TAG_upc_relaxed_type
:
9484 return "DW_TAG_upc_relaxed_type";
9485 case DW_TAG_PGI_kanji_type
:
9486 return "DW_TAG_PGI_kanji_type";
9487 case DW_TAG_PGI_interface_block
:
9488 return "DW_TAG_PGI_interface_block";
9490 return "DW_TAG_<unknown>";
9494 /* Convert a DWARF attribute code into its string name. */
9497 dwarf_attr_name (unsigned attr
)
9502 return "DW_AT_sibling";
9503 case DW_AT_location
:
9504 return "DW_AT_location";
9506 return "DW_AT_name";
9507 case DW_AT_ordering
:
9508 return "DW_AT_ordering";
9509 case DW_AT_subscr_data
:
9510 return "DW_AT_subscr_data";
9511 case DW_AT_byte_size
:
9512 return "DW_AT_byte_size";
9513 case DW_AT_bit_offset
:
9514 return "DW_AT_bit_offset";
9515 case DW_AT_bit_size
:
9516 return "DW_AT_bit_size";
9517 case DW_AT_element_list
:
9518 return "DW_AT_element_list";
9519 case DW_AT_stmt_list
:
9520 return "DW_AT_stmt_list";
9522 return "DW_AT_low_pc";
9524 return "DW_AT_high_pc";
9525 case DW_AT_language
:
9526 return "DW_AT_language";
9528 return "DW_AT_member";
9530 return "DW_AT_discr";
9531 case DW_AT_discr_value
:
9532 return "DW_AT_discr_value";
9533 case DW_AT_visibility
:
9534 return "DW_AT_visibility";
9536 return "DW_AT_import";
9537 case DW_AT_string_length
:
9538 return "DW_AT_string_length";
9539 case DW_AT_common_reference
:
9540 return "DW_AT_common_reference";
9541 case DW_AT_comp_dir
:
9542 return "DW_AT_comp_dir";
9543 case DW_AT_const_value
:
9544 return "DW_AT_const_value";
9545 case DW_AT_containing_type
:
9546 return "DW_AT_containing_type";
9547 case DW_AT_default_value
:
9548 return "DW_AT_default_value";
9550 return "DW_AT_inline";
9551 case DW_AT_is_optional
:
9552 return "DW_AT_is_optional";
9553 case DW_AT_lower_bound
:
9554 return "DW_AT_lower_bound";
9555 case DW_AT_producer
:
9556 return "DW_AT_producer";
9557 case DW_AT_prototyped
:
9558 return "DW_AT_prototyped";
9559 case DW_AT_return_addr
:
9560 return "DW_AT_return_addr";
9561 case DW_AT_start_scope
:
9562 return "DW_AT_start_scope";
9563 case DW_AT_bit_stride
:
9564 return "DW_AT_bit_stride";
9565 case DW_AT_upper_bound
:
9566 return "DW_AT_upper_bound";
9567 case DW_AT_abstract_origin
:
9568 return "DW_AT_abstract_origin";
9569 case DW_AT_accessibility
:
9570 return "DW_AT_accessibility";
9571 case DW_AT_address_class
:
9572 return "DW_AT_address_class";
9573 case DW_AT_artificial
:
9574 return "DW_AT_artificial";
9575 case DW_AT_base_types
:
9576 return "DW_AT_base_types";
9577 case DW_AT_calling_convention
:
9578 return "DW_AT_calling_convention";
9580 return "DW_AT_count";
9581 case DW_AT_data_member_location
:
9582 return "DW_AT_data_member_location";
9583 case DW_AT_decl_column
:
9584 return "DW_AT_decl_column";
9585 case DW_AT_decl_file
:
9586 return "DW_AT_decl_file";
9587 case DW_AT_decl_line
:
9588 return "DW_AT_decl_line";
9589 case DW_AT_declaration
:
9590 return "DW_AT_declaration";
9591 case DW_AT_discr_list
:
9592 return "DW_AT_discr_list";
9593 case DW_AT_encoding
:
9594 return "DW_AT_encoding";
9595 case DW_AT_external
:
9596 return "DW_AT_external";
9597 case DW_AT_frame_base
:
9598 return "DW_AT_frame_base";
9600 return "DW_AT_friend";
9601 case DW_AT_identifier_case
:
9602 return "DW_AT_identifier_case";
9603 case DW_AT_macro_info
:
9604 return "DW_AT_macro_info";
9605 case DW_AT_namelist_items
:
9606 return "DW_AT_namelist_items";
9607 case DW_AT_priority
:
9608 return "DW_AT_priority";
9610 return "DW_AT_segment";
9611 case DW_AT_specification
:
9612 return "DW_AT_specification";
9613 case DW_AT_static_link
:
9614 return "DW_AT_static_link";
9616 return "DW_AT_type";
9617 case DW_AT_use_location
:
9618 return "DW_AT_use_location";
9619 case DW_AT_variable_parameter
:
9620 return "DW_AT_variable_parameter";
9621 case DW_AT_virtuality
:
9622 return "DW_AT_virtuality";
9623 case DW_AT_vtable_elem_location
:
9624 return "DW_AT_vtable_elem_location";
9625 /* DWARF 3 values. */
9626 case DW_AT_allocated
:
9627 return "DW_AT_allocated";
9628 case DW_AT_associated
:
9629 return "DW_AT_associated";
9630 case DW_AT_data_location
:
9631 return "DW_AT_data_location";
9632 case DW_AT_byte_stride
:
9633 return "DW_AT_byte_stride";
9634 case DW_AT_entry_pc
:
9635 return "DW_AT_entry_pc";
9636 case DW_AT_use_UTF8
:
9637 return "DW_AT_use_UTF8";
9638 case DW_AT_extension
:
9639 return "DW_AT_extension";
9641 return "DW_AT_ranges";
9642 case DW_AT_trampoline
:
9643 return "DW_AT_trampoline";
9644 case DW_AT_call_column
:
9645 return "DW_AT_call_column";
9646 case DW_AT_call_file
:
9647 return "DW_AT_call_file";
9648 case DW_AT_call_line
:
9649 return "DW_AT_call_line";
9650 case DW_AT_description
:
9651 return "DW_AT_description";
9652 case DW_AT_binary_scale
:
9653 return "DW_AT_binary_scale";
9654 case DW_AT_decimal_scale
:
9655 return "DW_AT_decimal_scale";
9657 return "DW_AT_small";
9658 case DW_AT_decimal_sign
:
9659 return "DW_AT_decimal_sign";
9660 case DW_AT_digit_count
:
9661 return "DW_AT_digit_count";
9662 case DW_AT_picture_string
:
9663 return "DW_AT_picture_string";
9665 return "DW_AT_mutable";
9666 case DW_AT_threads_scaled
:
9667 return "DW_AT_threads_scaled";
9668 case DW_AT_explicit
:
9669 return "DW_AT_explicit";
9670 case DW_AT_object_pointer
:
9671 return "DW_AT_object_pointer";
9672 case DW_AT_endianity
:
9673 return "DW_AT_endianity";
9674 case DW_AT_elemental
:
9675 return "DW_AT_elemental";
9677 return "DW_AT_pure";
9678 case DW_AT_recursive
:
9679 return "DW_AT_recursive";
9680 /* DWARF 4 values. */
9681 case DW_AT_signature
:
9682 return "DW_AT_signature";
9683 case DW_AT_linkage_name
:
9684 return "DW_AT_linkage_name";
9685 /* SGI/MIPS extensions. */
9686 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9687 case DW_AT_MIPS_fde
:
9688 return "DW_AT_MIPS_fde";
9690 case DW_AT_MIPS_loop_begin
:
9691 return "DW_AT_MIPS_loop_begin";
9692 case DW_AT_MIPS_tail_loop_begin
:
9693 return "DW_AT_MIPS_tail_loop_begin";
9694 case DW_AT_MIPS_epilog_begin
:
9695 return "DW_AT_MIPS_epilog_begin";
9696 case DW_AT_MIPS_loop_unroll_factor
:
9697 return "DW_AT_MIPS_loop_unroll_factor";
9698 case DW_AT_MIPS_software_pipeline_depth
:
9699 return "DW_AT_MIPS_software_pipeline_depth";
9700 case DW_AT_MIPS_linkage_name
:
9701 return "DW_AT_MIPS_linkage_name";
9702 case DW_AT_MIPS_stride
:
9703 return "DW_AT_MIPS_stride";
9704 case DW_AT_MIPS_abstract_name
:
9705 return "DW_AT_MIPS_abstract_name";
9706 case DW_AT_MIPS_clone_origin
:
9707 return "DW_AT_MIPS_clone_origin";
9708 case DW_AT_MIPS_has_inlines
:
9709 return "DW_AT_MIPS_has_inlines";
9710 /* HP extensions. */
9711 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9712 case DW_AT_HP_block_index
:
9713 return "DW_AT_HP_block_index";
9715 case DW_AT_HP_unmodifiable
:
9716 return "DW_AT_HP_unmodifiable";
9717 case DW_AT_HP_actuals_stmt_list
:
9718 return "DW_AT_HP_actuals_stmt_list";
9719 case DW_AT_HP_proc_per_section
:
9720 return "DW_AT_HP_proc_per_section";
9721 case DW_AT_HP_raw_data_ptr
:
9722 return "DW_AT_HP_raw_data_ptr";
9723 case DW_AT_HP_pass_by_reference
:
9724 return "DW_AT_HP_pass_by_reference";
9725 case DW_AT_HP_opt_level
:
9726 return "DW_AT_HP_opt_level";
9727 case DW_AT_HP_prof_version_id
:
9728 return "DW_AT_HP_prof_version_id";
9729 case DW_AT_HP_opt_flags
:
9730 return "DW_AT_HP_opt_flags";
9731 case DW_AT_HP_cold_region_low_pc
:
9732 return "DW_AT_HP_cold_region_low_pc";
9733 case DW_AT_HP_cold_region_high_pc
:
9734 return "DW_AT_HP_cold_region_high_pc";
9735 case DW_AT_HP_all_variables_modifiable
:
9736 return "DW_AT_HP_all_variables_modifiable";
9737 case DW_AT_HP_linkage_name
:
9738 return "DW_AT_HP_linkage_name";
9739 case DW_AT_HP_prof_flags
:
9740 return "DW_AT_HP_prof_flags";
9741 /* GNU extensions. */
9742 case DW_AT_sf_names
:
9743 return "DW_AT_sf_names";
9744 case DW_AT_src_info
:
9745 return "DW_AT_src_info";
9746 case DW_AT_mac_info
:
9747 return "DW_AT_mac_info";
9748 case DW_AT_src_coords
:
9749 return "DW_AT_src_coords";
9750 case DW_AT_body_begin
:
9751 return "DW_AT_body_begin";
9752 case DW_AT_body_end
:
9753 return "DW_AT_body_end";
9754 case DW_AT_GNU_vector
:
9755 return "DW_AT_GNU_vector";
9756 /* VMS extensions. */
9757 case DW_AT_VMS_rtnbeg_pd_address
:
9758 return "DW_AT_VMS_rtnbeg_pd_address";
9759 /* UPC extension. */
9760 case DW_AT_upc_threads_scaled
:
9761 return "DW_AT_upc_threads_scaled";
9762 /* PGI (STMicroelectronics) extensions. */
9763 case DW_AT_PGI_lbase
:
9764 return "DW_AT_PGI_lbase";
9765 case DW_AT_PGI_soffset
:
9766 return "DW_AT_PGI_soffset";
9767 case DW_AT_PGI_lstride
:
9768 return "DW_AT_PGI_lstride";
9770 return "DW_AT_<unknown>";
9774 /* Convert a DWARF value form code into its string name. */
9777 dwarf_form_name (unsigned form
)
9782 return "DW_FORM_addr";
9783 case DW_FORM_block2
:
9784 return "DW_FORM_block2";
9785 case DW_FORM_block4
:
9786 return "DW_FORM_block4";
9788 return "DW_FORM_data2";
9790 return "DW_FORM_data4";
9792 return "DW_FORM_data8";
9793 case DW_FORM_string
:
9794 return "DW_FORM_string";
9796 return "DW_FORM_block";
9797 case DW_FORM_block1
:
9798 return "DW_FORM_block1";
9800 return "DW_FORM_data1";
9802 return "DW_FORM_flag";
9804 return "DW_FORM_sdata";
9806 return "DW_FORM_strp";
9808 return "DW_FORM_udata";
9809 case DW_FORM_ref_addr
:
9810 return "DW_FORM_ref_addr";
9812 return "DW_FORM_ref1";
9814 return "DW_FORM_ref2";
9816 return "DW_FORM_ref4";
9818 return "DW_FORM_ref8";
9819 case DW_FORM_ref_udata
:
9820 return "DW_FORM_ref_udata";
9821 case DW_FORM_indirect
:
9822 return "DW_FORM_indirect";
9823 case DW_FORM_sec_offset
:
9824 return "DW_FORM_sec_offset";
9825 case DW_FORM_exprloc
:
9826 return "DW_FORM_exprloc";
9827 case DW_FORM_flag_present
:
9828 return "DW_FORM_flag_present";
9830 return "DW_FORM_sig8";
9832 return "DW_FORM_<unknown>";
9836 /* Convert a DWARF stack opcode into its string name. */
9839 dwarf_stack_op_name (unsigned op
)
9844 return "DW_OP_addr";
9846 return "DW_OP_deref";
9848 return "DW_OP_const1u";
9850 return "DW_OP_const1s";
9852 return "DW_OP_const2u";
9854 return "DW_OP_const2s";
9856 return "DW_OP_const4u";
9858 return "DW_OP_const4s";
9860 return "DW_OP_const8u";
9862 return "DW_OP_const8s";
9864 return "DW_OP_constu";
9866 return "DW_OP_consts";
9870 return "DW_OP_drop";
9872 return "DW_OP_over";
9874 return "DW_OP_pick";
9876 return "DW_OP_swap";
9880 return "DW_OP_xderef";
9888 return "DW_OP_minus";
9900 return "DW_OP_plus";
9901 case DW_OP_plus_uconst
:
9902 return "DW_OP_plus_uconst";
9908 return "DW_OP_shra";
9926 return "DW_OP_skip";
9928 return "DW_OP_lit0";
9930 return "DW_OP_lit1";
9932 return "DW_OP_lit2";
9934 return "DW_OP_lit3";
9936 return "DW_OP_lit4";
9938 return "DW_OP_lit5";
9940 return "DW_OP_lit6";
9942 return "DW_OP_lit7";
9944 return "DW_OP_lit8";
9946 return "DW_OP_lit9";
9948 return "DW_OP_lit10";
9950 return "DW_OP_lit11";
9952 return "DW_OP_lit12";
9954 return "DW_OP_lit13";
9956 return "DW_OP_lit14";
9958 return "DW_OP_lit15";
9960 return "DW_OP_lit16";
9962 return "DW_OP_lit17";
9964 return "DW_OP_lit18";
9966 return "DW_OP_lit19";
9968 return "DW_OP_lit20";
9970 return "DW_OP_lit21";
9972 return "DW_OP_lit22";
9974 return "DW_OP_lit23";
9976 return "DW_OP_lit24";
9978 return "DW_OP_lit25";
9980 return "DW_OP_lit26";
9982 return "DW_OP_lit27";
9984 return "DW_OP_lit28";
9986 return "DW_OP_lit29";
9988 return "DW_OP_lit30";
9990 return "DW_OP_lit31";
9992 return "DW_OP_reg0";
9994 return "DW_OP_reg1";
9996 return "DW_OP_reg2";
9998 return "DW_OP_reg3";
10000 return "DW_OP_reg4";
10002 return "DW_OP_reg5";
10004 return "DW_OP_reg6";
10006 return "DW_OP_reg7";
10008 return "DW_OP_reg8";
10010 return "DW_OP_reg9";
10012 return "DW_OP_reg10";
10014 return "DW_OP_reg11";
10016 return "DW_OP_reg12";
10018 return "DW_OP_reg13";
10020 return "DW_OP_reg14";
10022 return "DW_OP_reg15";
10024 return "DW_OP_reg16";
10026 return "DW_OP_reg17";
10028 return "DW_OP_reg18";
10030 return "DW_OP_reg19";
10032 return "DW_OP_reg20";
10034 return "DW_OP_reg21";
10036 return "DW_OP_reg22";
10038 return "DW_OP_reg23";
10040 return "DW_OP_reg24";
10042 return "DW_OP_reg25";
10044 return "DW_OP_reg26";
10046 return "DW_OP_reg27";
10048 return "DW_OP_reg28";
10050 return "DW_OP_reg29";
10052 return "DW_OP_reg30";
10054 return "DW_OP_reg31";
10056 return "DW_OP_breg0";
10058 return "DW_OP_breg1";
10060 return "DW_OP_breg2";
10062 return "DW_OP_breg3";
10064 return "DW_OP_breg4";
10066 return "DW_OP_breg5";
10068 return "DW_OP_breg6";
10070 return "DW_OP_breg7";
10072 return "DW_OP_breg8";
10074 return "DW_OP_breg9";
10076 return "DW_OP_breg10";
10078 return "DW_OP_breg11";
10080 return "DW_OP_breg12";
10082 return "DW_OP_breg13";
10084 return "DW_OP_breg14";
10086 return "DW_OP_breg15";
10088 return "DW_OP_breg16";
10090 return "DW_OP_breg17";
10092 return "DW_OP_breg18";
10094 return "DW_OP_breg19";
10096 return "DW_OP_breg20";
10098 return "DW_OP_breg21";
10100 return "DW_OP_breg22";
10102 return "DW_OP_breg23";
10104 return "DW_OP_breg24";
10106 return "DW_OP_breg25";
10108 return "DW_OP_breg26";
10110 return "DW_OP_breg27";
10112 return "DW_OP_breg28";
10114 return "DW_OP_breg29";
10116 return "DW_OP_breg30";
10118 return "DW_OP_breg31";
10120 return "DW_OP_regx";
10122 return "DW_OP_fbreg";
10124 return "DW_OP_bregx";
10126 return "DW_OP_piece";
10127 case DW_OP_deref_size
:
10128 return "DW_OP_deref_size";
10129 case DW_OP_xderef_size
:
10130 return "DW_OP_xderef_size";
10132 return "DW_OP_nop";
10133 /* DWARF 3 extensions. */
10134 case DW_OP_push_object_address
:
10135 return "DW_OP_push_object_address";
10137 return "DW_OP_call2";
10139 return "DW_OP_call4";
10140 case DW_OP_call_ref
:
10141 return "DW_OP_call_ref";
10142 /* GNU extensions. */
10143 case DW_OP_form_tls_address
:
10144 return "DW_OP_form_tls_address";
10145 case DW_OP_call_frame_cfa
:
10146 return "DW_OP_call_frame_cfa";
10147 case DW_OP_bit_piece
:
10148 return "DW_OP_bit_piece";
10149 case DW_OP_GNU_push_tls_address
:
10150 return "DW_OP_GNU_push_tls_address";
10151 case DW_OP_GNU_uninit
:
10152 return "DW_OP_GNU_uninit";
10153 /* HP extensions. */
10154 case DW_OP_HP_is_value
:
10155 return "DW_OP_HP_is_value";
10156 case DW_OP_HP_fltconst4
:
10157 return "DW_OP_HP_fltconst4";
10158 case DW_OP_HP_fltconst8
:
10159 return "DW_OP_HP_fltconst8";
10160 case DW_OP_HP_mod_range
:
10161 return "DW_OP_HP_mod_range";
10162 case DW_OP_HP_unmod_range
:
10163 return "DW_OP_HP_unmod_range";
10165 return "DW_OP_HP_tls";
10167 return "OP_<unknown>";
10172 dwarf_bool_name (unsigned mybool
)
10180 /* Convert a DWARF type code into its string name. */
10183 dwarf_type_encoding_name (unsigned enc
)
10188 return "DW_ATE_void";
10189 case DW_ATE_address
:
10190 return "DW_ATE_address";
10191 case DW_ATE_boolean
:
10192 return "DW_ATE_boolean";
10193 case DW_ATE_complex_float
:
10194 return "DW_ATE_complex_float";
10196 return "DW_ATE_float";
10197 case DW_ATE_signed
:
10198 return "DW_ATE_signed";
10199 case DW_ATE_signed_char
:
10200 return "DW_ATE_signed_char";
10201 case DW_ATE_unsigned
:
10202 return "DW_ATE_unsigned";
10203 case DW_ATE_unsigned_char
:
10204 return "DW_ATE_unsigned_char";
10206 case DW_ATE_imaginary_float
:
10207 return "DW_ATE_imaginary_float";
10208 case DW_ATE_packed_decimal
:
10209 return "DW_ATE_packed_decimal";
10210 case DW_ATE_numeric_string
:
10211 return "DW_ATE_numeric_string";
10212 case DW_ATE_edited
:
10213 return "DW_ATE_edited";
10214 case DW_ATE_signed_fixed
:
10215 return "DW_ATE_signed_fixed";
10216 case DW_ATE_unsigned_fixed
:
10217 return "DW_ATE_unsigned_fixed";
10218 case DW_ATE_decimal_float
:
10219 return "DW_ATE_decimal_float";
10220 /* HP extensions. */
10221 case DW_ATE_HP_float80
:
10222 return "DW_ATE_HP_float80";
10223 case DW_ATE_HP_complex_float80
:
10224 return "DW_ATE_HP_complex_float80";
10225 case DW_ATE_HP_float128
:
10226 return "DW_ATE_HP_float128";
10227 case DW_ATE_HP_complex_float128
:
10228 return "DW_ATE_HP_complex_float128";
10229 case DW_ATE_HP_floathpintel
:
10230 return "DW_ATE_HP_floathpintel";
10231 case DW_ATE_HP_imaginary_float80
:
10232 return "DW_ATE_HP_imaginary_float80";
10233 case DW_ATE_HP_imaginary_float128
:
10234 return "DW_ATE_HP_imaginary_float128";
10236 return "DW_ATE_<unknown>";
10240 /* Convert a DWARF call frame info operation to its string name. */
10244 dwarf_cfi_name (unsigned cfi_opc
)
10248 case DW_CFA_advance_loc
:
10249 return "DW_CFA_advance_loc";
10250 case DW_CFA_offset
:
10251 return "DW_CFA_offset";
10252 case DW_CFA_restore
:
10253 return "DW_CFA_restore";
10255 return "DW_CFA_nop";
10256 case DW_CFA_set_loc
:
10257 return "DW_CFA_set_loc";
10258 case DW_CFA_advance_loc1
:
10259 return "DW_CFA_advance_loc1";
10260 case DW_CFA_advance_loc2
:
10261 return "DW_CFA_advance_loc2";
10262 case DW_CFA_advance_loc4
:
10263 return "DW_CFA_advance_loc4";
10264 case DW_CFA_offset_extended
:
10265 return "DW_CFA_offset_extended";
10266 case DW_CFA_restore_extended
:
10267 return "DW_CFA_restore_extended";
10268 case DW_CFA_undefined
:
10269 return "DW_CFA_undefined";
10270 case DW_CFA_same_value
:
10271 return "DW_CFA_same_value";
10272 case DW_CFA_register
:
10273 return "DW_CFA_register";
10274 case DW_CFA_remember_state
:
10275 return "DW_CFA_remember_state";
10276 case DW_CFA_restore_state
:
10277 return "DW_CFA_restore_state";
10278 case DW_CFA_def_cfa
:
10279 return "DW_CFA_def_cfa";
10280 case DW_CFA_def_cfa_register
:
10281 return "DW_CFA_def_cfa_register";
10282 case DW_CFA_def_cfa_offset
:
10283 return "DW_CFA_def_cfa_offset";
10285 case DW_CFA_def_cfa_expression
:
10286 return "DW_CFA_def_cfa_expression";
10287 case DW_CFA_expression
:
10288 return "DW_CFA_expression";
10289 case DW_CFA_offset_extended_sf
:
10290 return "DW_CFA_offset_extended_sf";
10291 case DW_CFA_def_cfa_sf
:
10292 return "DW_CFA_def_cfa_sf";
10293 case DW_CFA_def_cfa_offset_sf
:
10294 return "DW_CFA_def_cfa_offset_sf";
10295 case DW_CFA_val_offset
:
10296 return "DW_CFA_val_offset";
10297 case DW_CFA_val_offset_sf
:
10298 return "DW_CFA_val_offset_sf";
10299 case DW_CFA_val_expression
:
10300 return "DW_CFA_val_expression";
10301 /* SGI/MIPS specific. */
10302 case DW_CFA_MIPS_advance_loc8
:
10303 return "DW_CFA_MIPS_advance_loc8";
10304 /* GNU extensions. */
10305 case DW_CFA_GNU_window_save
:
10306 return "DW_CFA_GNU_window_save";
10307 case DW_CFA_GNU_args_size
:
10308 return "DW_CFA_GNU_args_size";
10309 case DW_CFA_GNU_negative_offset_extended
:
10310 return "DW_CFA_GNU_negative_offset_extended";
10312 return "DW_CFA_<unknown>";
10318 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10322 print_spaces (indent
, f
);
10323 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10324 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10326 if (die
->parent
!= NULL
)
10328 print_spaces (indent
, f
);
10329 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10330 die
->parent
->offset
);
10333 print_spaces (indent
, f
);
10334 fprintf_unfiltered (f
, " has children: %s\n",
10335 dwarf_bool_name (die
->child
!= NULL
));
10337 print_spaces (indent
, f
);
10338 fprintf_unfiltered (f
, " attributes:\n");
10340 for (i
= 0; i
< die
->num_attrs
; ++i
)
10342 print_spaces (indent
, f
);
10343 fprintf_unfiltered (f
, " %s (%s) ",
10344 dwarf_attr_name (die
->attrs
[i
].name
),
10345 dwarf_form_name (die
->attrs
[i
].form
));
10347 switch (die
->attrs
[i
].form
)
10349 case DW_FORM_ref_addr
:
10351 fprintf_unfiltered (f
, "address: ");
10352 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10354 case DW_FORM_block2
:
10355 case DW_FORM_block4
:
10356 case DW_FORM_block
:
10357 case DW_FORM_block1
:
10358 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10360 case DW_FORM_exprloc
:
10361 fprintf_unfiltered (f
, "expression: size %u",
10362 DW_BLOCK (&die
->attrs
[i
])->size
);
10367 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10368 (long) (DW_ADDR (&die
->attrs
[i
])));
10370 case DW_FORM_data1
:
10371 case DW_FORM_data2
:
10372 case DW_FORM_data4
:
10373 case DW_FORM_data8
:
10374 case DW_FORM_udata
:
10375 case DW_FORM_sdata
:
10376 fprintf_unfiltered (f
, "constant: %s",
10377 pulongest (DW_UNSND (&die
->attrs
[i
])));
10379 case DW_FORM_sec_offset
:
10380 fprintf_unfiltered (f
, "section offset: %s",
10381 pulongest (DW_UNSND (&die
->attrs
[i
])));
10384 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10385 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10386 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10388 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10390 case DW_FORM_string
:
10392 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10393 DW_STRING (&die
->attrs
[i
])
10394 ? DW_STRING (&die
->attrs
[i
]) : "",
10395 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10398 if (DW_UNSND (&die
->attrs
[i
]))
10399 fprintf_unfiltered (f
, "flag: TRUE");
10401 fprintf_unfiltered (f
, "flag: FALSE");
10403 case DW_FORM_flag_present
:
10404 fprintf_unfiltered (f
, "flag: TRUE");
10406 case DW_FORM_indirect
:
10407 /* the reader will have reduced the indirect form to
10408 the "base form" so this form should not occur */
10409 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10412 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10413 die
->attrs
[i
].form
);
10416 fprintf_unfiltered (f
, "\n");
10421 dump_die_for_error (struct die_info
*die
)
10423 dump_die_shallow (gdb_stderr
, 0, die
);
10427 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10429 int indent
= level
* 4;
10431 gdb_assert (die
!= NULL
);
10433 if (level
>= max_level
)
10436 dump_die_shallow (f
, indent
, die
);
10438 if (die
->child
!= NULL
)
10440 print_spaces (indent
, f
);
10441 fprintf_unfiltered (f
, " Children:");
10442 if (level
+ 1 < max_level
)
10444 fprintf_unfiltered (f
, "\n");
10445 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10449 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10453 if (die
->sibling
!= NULL
&& level
> 0)
10455 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10459 /* This is called from the pdie macro in gdbinit.in.
10460 It's not static so gcc will keep a copy callable from gdb. */
10463 dump_die (struct die_info
*die
, int max_level
)
10465 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10469 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10473 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10479 is_ref_attr (struct attribute
*attr
)
10481 switch (attr
->form
)
10483 case DW_FORM_ref_addr
:
10488 case DW_FORM_ref_udata
:
10495 static unsigned int
10496 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10498 if (is_ref_attr (attr
))
10499 return DW_ADDR (attr
);
10501 complaint (&symfile_complaints
,
10502 _("unsupported die ref attribute form: '%s'"),
10503 dwarf_form_name (attr
->form
));
10507 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10508 * the value held by the attribute is not constant. */
10511 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10513 if (attr
->form
== DW_FORM_sdata
)
10514 return DW_SND (attr
);
10515 else if (attr
->form
== DW_FORM_udata
10516 || attr
->form
== DW_FORM_data1
10517 || attr
->form
== DW_FORM_data2
10518 || attr
->form
== DW_FORM_data4
10519 || attr
->form
== DW_FORM_data8
)
10520 return DW_UNSND (attr
);
10523 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10524 dwarf_form_name (attr
->form
));
10525 return default_value
;
10529 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10530 unit and add it to our queue.
10531 The result is non-zero if PER_CU was queued, otherwise the result is zero
10532 meaning either PER_CU is already queued or it is already loaded. */
10535 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10536 struct dwarf2_per_cu_data
*per_cu
)
10538 /* Mark the dependence relation so that we don't flush PER_CU
10540 dwarf2_add_dependence (this_cu
, per_cu
);
10542 /* If it's already on the queue, we have nothing to do. */
10543 if (per_cu
->queued
)
10546 /* If the compilation unit is already loaded, just mark it as
10548 if (per_cu
->cu
!= NULL
)
10550 per_cu
->cu
->last_used
= 0;
10554 /* Add it to the queue. */
10555 queue_comp_unit (per_cu
, this_cu
->objfile
);
10560 /* Follow reference or signature attribute ATTR of SRC_DIE.
10561 On entry *REF_CU is the CU of SRC_DIE.
10562 On exit *REF_CU is the CU of the result. */
10564 static struct die_info
*
10565 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10566 struct dwarf2_cu
**ref_cu
)
10568 struct die_info
*die
;
10570 if (is_ref_attr (attr
))
10571 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10572 else if (attr
->form
== DW_FORM_sig8
)
10573 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10576 dump_die_for_error (src_die
);
10577 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10578 (*ref_cu
)->objfile
->name
);
10584 /* Follow reference attribute ATTR of SRC_DIE.
10585 On entry *REF_CU is the CU of SRC_DIE.
10586 On exit *REF_CU is the CU of the result. */
10588 static struct die_info
*
10589 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10590 struct dwarf2_cu
**ref_cu
)
10592 struct die_info
*die
;
10593 unsigned int offset
;
10594 struct die_info temp_die
;
10595 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10597 gdb_assert (cu
->per_cu
!= NULL
);
10599 offset
= dwarf2_get_ref_die_offset (attr
);
10601 if (cu
->per_cu
->from_debug_types
)
10603 /* .debug_types CUs cannot reference anything outside their CU.
10604 If they need to, they have to reference a signatured type via
10606 if (! offset_in_cu_p (&cu
->header
, offset
))
10610 else if (! offset_in_cu_p (&cu
->header
, offset
))
10612 struct dwarf2_per_cu_data
*per_cu
;
10614 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10616 /* If necessary, add it to the queue and load its DIEs. */
10617 if (maybe_queue_comp_unit (cu
, per_cu
))
10618 load_full_comp_unit (per_cu
, cu
->objfile
);
10620 target_cu
= per_cu
->cu
;
10625 *ref_cu
= target_cu
;
10626 temp_die
.offset
= offset
;
10627 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10633 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10634 "at 0x%x [in module %s]"),
10635 offset
, src_die
->offset
, cu
->objfile
->name
);
10638 /* Follow the signature attribute ATTR in SRC_DIE.
10639 On entry *REF_CU is the CU of SRC_DIE.
10640 On exit *REF_CU is the CU of the result. */
10642 static struct die_info
*
10643 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10644 struct dwarf2_cu
**ref_cu
)
10646 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10647 struct die_info temp_die
;
10648 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10649 struct dwarf2_cu
*sig_cu
;
10650 struct die_info
*die
;
10652 /* sig_type will be NULL if the signatured type is missing from
10654 if (sig_type
== NULL
)
10655 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10656 "at 0x%x [in module %s]"),
10657 src_die
->offset
, objfile
->name
);
10659 /* If necessary, add it to the queue and load its DIEs. */
10661 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10662 read_signatured_type (objfile
, sig_type
);
10664 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10666 sig_cu
= sig_type
->per_cu
.cu
;
10667 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10668 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10675 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10676 "at 0x%x [in module %s]"),
10677 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10680 /* Given an offset of a signatured type, return its signatured_type. */
10682 static struct signatured_type
*
10683 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10685 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10686 unsigned int length
, initial_length_size
;
10687 unsigned int sig_offset
;
10688 struct signatured_type find_entry
, *type_sig
;
10690 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10691 sig_offset
= (initial_length_size
10693 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10694 + 1 /*address_size*/);
10695 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10696 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10698 /* This is only used to lookup previously recorded types.
10699 If we didn't find it, it's our bug. */
10700 gdb_assert (type_sig
!= NULL
);
10701 gdb_assert (offset
== type_sig
->offset
);
10706 /* Read in signatured type at OFFSET and build its CU and die(s). */
10709 read_signatured_type_at_offset (struct objfile
*objfile
,
10710 unsigned int offset
)
10712 struct signatured_type
*type_sig
;
10714 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
10716 /* We have the section offset, but we need the signature to do the
10717 hash table lookup. */
10718 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10720 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10722 read_signatured_type (objfile
, type_sig
);
10724 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10727 /* Read in a signatured type and build its CU and DIEs. */
10730 read_signatured_type (struct objfile
*objfile
,
10731 struct signatured_type
*type_sig
)
10733 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10734 struct die_reader_specs reader_specs
;
10735 struct dwarf2_cu
*cu
;
10736 ULONGEST signature
;
10737 struct cleanup
*back_to
, *free_cu_cleanup
;
10738 struct attribute
*attr
;
10740 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10742 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10743 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10744 obstack_init (&cu
->comp_unit_obstack
);
10745 cu
->objfile
= objfile
;
10746 type_sig
->per_cu
.cu
= cu
;
10747 cu
->per_cu
= &type_sig
->per_cu
;
10749 /* If an error occurs while loading, release our storage. */
10750 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10752 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10753 types_ptr
, objfile
->obfd
);
10754 gdb_assert (signature
== type_sig
->signature
);
10757 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10761 &cu
->comp_unit_obstack
,
10762 hashtab_obstack_allocate
,
10763 dummy_obstack_deallocate
);
10765 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10766 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10768 init_cu_die_reader (&reader_specs
, cu
);
10770 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10773 /* We try not to read any attributes in this function, because not
10774 all objfiles needed for references have been loaded yet, and symbol
10775 table processing isn't initialized. But we have to set the CU language,
10776 or we won't be able to build types correctly. */
10777 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10779 set_cu_language (DW_UNSND (attr
), cu
);
10781 set_cu_language (language_minimal
, cu
);
10783 do_cleanups (back_to
);
10785 /* We've successfully allocated this compilation unit. Let our caller
10786 clean it up when finished with it. */
10787 discard_cleanups (free_cu_cleanup
);
10789 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10790 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10793 /* Decode simple location descriptions.
10794 Given a pointer to a dwarf block that defines a location, compute
10795 the location and return the value.
10797 NOTE drow/2003-11-18: This function is called in two situations
10798 now: for the address of static or global variables (partial symbols
10799 only) and for offsets into structures which are expected to be
10800 (more or less) constant. The partial symbol case should go away,
10801 and only the constant case should remain. That will let this
10802 function complain more accurately. A few special modes are allowed
10803 without complaint for global variables (for instance, global
10804 register values and thread-local values).
10806 A location description containing no operations indicates that the
10807 object is optimized out. The return value is 0 for that case.
10808 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10809 callers will only want a very basic result and this can become a
10812 Note that stack[0] is unused except as a default error return.
10813 Note that stack overflow is not yet handled. */
10816 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10818 struct objfile
*objfile
= cu
->objfile
;
10820 int size
= blk
->size
;
10821 gdb_byte
*data
= blk
->data
;
10822 CORE_ADDR stack
[64];
10824 unsigned int bytes_read
, unsnd
;
10868 stack
[++stacki
] = op
- DW_OP_lit0
;
10903 stack
[++stacki
] = op
- DW_OP_reg0
;
10905 dwarf2_complex_location_expr_complaint ();
10909 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10911 stack
[++stacki
] = unsnd
;
10913 dwarf2_complex_location_expr_complaint ();
10917 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10922 case DW_OP_const1u
:
10923 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10927 case DW_OP_const1s
:
10928 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10932 case DW_OP_const2u
:
10933 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10937 case DW_OP_const2s
:
10938 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10942 case DW_OP_const4u
:
10943 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10947 case DW_OP_const4s
:
10948 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10953 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10959 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10964 stack
[stacki
+ 1] = stack
[stacki
];
10969 stack
[stacki
- 1] += stack
[stacki
];
10973 case DW_OP_plus_uconst
:
10974 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10979 stack
[stacki
- 1] -= stack
[stacki
];
10984 /* If we're not the last op, then we definitely can't encode
10985 this using GDB's address_class enum. This is valid for partial
10986 global symbols, although the variable's address will be bogus
10989 dwarf2_complex_location_expr_complaint ();
10992 case DW_OP_GNU_push_tls_address
:
10993 /* The top of the stack has the offset from the beginning
10994 of the thread control block at which the variable is located. */
10995 /* Nothing should follow this operator, so the top of stack would
10997 /* This is valid for partial global symbols, but the variable's
10998 address will be bogus in the psymtab. */
11000 dwarf2_complex_location_expr_complaint ();
11003 case DW_OP_GNU_uninit
:
11007 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
11008 dwarf_stack_op_name (op
));
11009 return (stack
[stacki
]);
11012 return (stack
[stacki
]);
11015 /* memory allocation interface */
11017 static struct dwarf_block
*
11018 dwarf_alloc_block (struct dwarf2_cu
*cu
)
11020 struct dwarf_block
*blk
;
11022 blk
= (struct dwarf_block
*)
11023 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
11027 static struct abbrev_info
*
11028 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
11030 struct abbrev_info
*abbrev
;
11032 abbrev
= (struct abbrev_info
*)
11033 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
11034 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11038 static struct die_info
*
11039 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
11041 struct die_info
*die
;
11042 size_t size
= sizeof (struct die_info
);
11045 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
11047 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
11048 memset (die
, 0, sizeof (struct die_info
));
11053 /* Macro support. */
11056 /* Return the full name of file number I in *LH's file name table.
11057 Use COMP_DIR as the name of the current directory of the
11058 compilation. The result is allocated using xmalloc; the caller is
11059 responsible for freeing it. */
11061 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11063 /* Is the file number a valid index into the line header's file name
11064 table? Remember that file numbers start with one, not zero. */
11065 if (1 <= file
&& file
<= lh
->num_file_names
)
11067 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11069 if (IS_ABSOLUTE_PATH (fe
->name
))
11070 return xstrdup (fe
->name
);
11078 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11084 dir_len
= strlen (dir
);
11085 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11086 strcpy (full_name
, dir
);
11087 full_name
[dir_len
] = '/';
11088 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11092 return xstrdup (fe
->name
);
11097 /* The compiler produced a bogus file number. We can at least
11098 record the macro definitions made in the file, even if we
11099 won't be able to find the file by name. */
11100 char fake_name
[80];
11102 sprintf (fake_name
, "<bad macro file number %d>", file
);
11104 complaint (&symfile_complaints
,
11105 _("bad file number in macro information (%d)"),
11108 return xstrdup (fake_name
);
11113 static struct macro_source_file
*
11114 macro_start_file (int file
, int line
,
11115 struct macro_source_file
*current_file
,
11116 const char *comp_dir
,
11117 struct line_header
*lh
, struct objfile
*objfile
)
11119 /* The full name of this source file. */
11120 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11122 /* We don't create a macro table for this compilation unit
11123 at all until we actually get a filename. */
11124 if (! pending_macros
)
11125 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11126 objfile
->macro_cache
);
11128 if (! current_file
)
11129 /* If we have no current file, then this must be the start_file
11130 directive for the compilation unit's main source file. */
11131 current_file
= macro_set_main (pending_macros
, full_name
);
11133 current_file
= macro_include (current_file
, line
, full_name
);
11137 return current_file
;
11141 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11142 followed by a null byte. */
11144 copy_string (const char *buf
, int len
)
11146 char *s
= xmalloc (len
+ 1);
11148 memcpy (s
, buf
, len
);
11154 static const char *
11155 consume_improper_spaces (const char *p
, const char *body
)
11159 complaint (&symfile_complaints
,
11160 _("macro definition contains spaces in formal argument list:\n`%s'"),
11172 parse_macro_definition (struct macro_source_file
*file
, int line
,
11177 /* The body string takes one of two forms. For object-like macro
11178 definitions, it should be:
11180 <macro name> " " <definition>
11182 For function-like macro definitions, it should be:
11184 <macro name> "() " <definition>
11186 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11188 Spaces may appear only where explicitly indicated, and in the
11191 The Dwarf 2 spec says that an object-like macro's name is always
11192 followed by a space, but versions of GCC around March 2002 omit
11193 the space when the macro's definition is the empty string.
11195 The Dwarf 2 spec says that there should be no spaces between the
11196 formal arguments in a function-like macro's formal argument list,
11197 but versions of GCC around March 2002 include spaces after the
11201 /* Find the extent of the macro name. The macro name is terminated
11202 by either a space or null character (for an object-like macro) or
11203 an opening paren (for a function-like macro). */
11204 for (p
= body
; *p
; p
++)
11205 if (*p
== ' ' || *p
== '(')
11208 if (*p
== ' ' || *p
== '\0')
11210 /* It's an object-like macro. */
11211 int name_len
= p
- body
;
11212 char *name
= copy_string (body
, name_len
);
11213 const char *replacement
;
11216 replacement
= body
+ name_len
+ 1;
11219 dwarf2_macro_malformed_definition_complaint (body
);
11220 replacement
= body
+ name_len
;
11223 macro_define_object (file
, line
, name
, replacement
);
11227 else if (*p
== '(')
11229 /* It's a function-like macro. */
11230 char *name
= copy_string (body
, p
- body
);
11233 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11237 p
= consume_improper_spaces (p
, body
);
11239 /* Parse the formal argument list. */
11240 while (*p
&& *p
!= ')')
11242 /* Find the extent of the current argument name. */
11243 const char *arg_start
= p
;
11245 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11248 if (! *p
|| p
== arg_start
)
11249 dwarf2_macro_malformed_definition_complaint (body
);
11252 /* Make sure argv has room for the new argument. */
11253 if (argc
>= argv_size
)
11256 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11259 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11262 p
= consume_improper_spaces (p
, body
);
11264 /* Consume the comma, if present. */
11269 p
= consume_improper_spaces (p
, body
);
11278 /* Perfectly formed definition, no complaints. */
11279 macro_define_function (file
, line
, name
,
11280 argc
, (const char **) argv
,
11282 else if (*p
== '\0')
11284 /* Complain, but do define it. */
11285 dwarf2_macro_malformed_definition_complaint (body
);
11286 macro_define_function (file
, line
, name
,
11287 argc
, (const char **) argv
,
11291 /* Just complain. */
11292 dwarf2_macro_malformed_definition_complaint (body
);
11295 /* Just complain. */
11296 dwarf2_macro_malformed_definition_complaint (body
);
11302 for (i
= 0; i
< argc
; i
++)
11308 dwarf2_macro_malformed_definition_complaint (body
);
11313 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11314 char *comp_dir
, bfd
*abfd
,
11315 struct dwarf2_cu
*cu
)
11317 gdb_byte
*mac_ptr
, *mac_end
;
11318 struct macro_source_file
*current_file
= 0;
11319 enum dwarf_macinfo_record_type macinfo_type
;
11320 int at_commandline
;
11322 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11323 &dwarf2_per_objfile
->macinfo
);
11324 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11326 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11330 /* First pass: Find the name of the base filename.
11331 This filename is needed in order to process all macros whose definition
11332 (or undefinition) comes from the command line. These macros are defined
11333 before the first DW_MACINFO_start_file entry, and yet still need to be
11334 associated to the base file.
11336 To determine the base file name, we scan the macro definitions until we
11337 reach the first DW_MACINFO_start_file entry. We then initialize
11338 CURRENT_FILE accordingly so that any macro definition found before the
11339 first DW_MACINFO_start_file can still be associated to the base file. */
11341 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11342 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11343 + dwarf2_per_objfile
->macinfo
.size
;
11347 /* Do we at least have room for a macinfo type byte? */
11348 if (mac_ptr
>= mac_end
)
11350 /* Complaint is printed during the second pass as GDB will probably
11351 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11355 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11358 switch (macinfo_type
)
11360 /* A zero macinfo type indicates the end of the macro
11365 case DW_MACINFO_define
:
11366 case DW_MACINFO_undef
:
11367 /* Only skip the data by MAC_PTR. */
11369 unsigned int bytes_read
;
11371 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11372 mac_ptr
+= bytes_read
;
11373 read_string (abfd
, mac_ptr
, &bytes_read
);
11374 mac_ptr
+= bytes_read
;
11378 case DW_MACINFO_start_file
:
11380 unsigned int bytes_read
;
11383 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11384 mac_ptr
+= bytes_read
;
11385 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11386 mac_ptr
+= bytes_read
;
11388 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11393 case DW_MACINFO_end_file
:
11394 /* No data to skip by MAC_PTR. */
11397 case DW_MACINFO_vendor_ext
:
11398 /* Only skip the data by MAC_PTR. */
11400 unsigned int bytes_read
;
11402 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11403 mac_ptr
+= bytes_read
;
11404 read_string (abfd
, mac_ptr
, &bytes_read
);
11405 mac_ptr
+= bytes_read
;
11412 } while (macinfo_type
!= 0 && current_file
== NULL
);
11414 /* Second pass: Process all entries.
11416 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11417 command-line macro definitions/undefinitions. This flag is unset when we
11418 reach the first DW_MACINFO_start_file entry. */
11420 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11422 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11423 GDB is still reading the definitions from command line. First
11424 DW_MACINFO_start_file will need to be ignored as it was already executed
11425 to create CURRENT_FILE for the main source holding also the command line
11426 definitions. On first met DW_MACINFO_start_file this flag is reset to
11427 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11429 at_commandline
= 1;
11433 /* Do we at least have room for a macinfo type byte? */
11434 if (mac_ptr
>= mac_end
)
11436 dwarf2_macros_too_long_complaint ();
11440 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11443 switch (macinfo_type
)
11445 /* A zero macinfo type indicates the end of the macro
11450 case DW_MACINFO_define
:
11451 case DW_MACINFO_undef
:
11453 unsigned int bytes_read
;
11457 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11458 mac_ptr
+= bytes_read
;
11459 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11460 mac_ptr
+= bytes_read
;
11462 if (! current_file
)
11464 /* DWARF violation as no main source is present. */
11465 complaint (&symfile_complaints
,
11466 _("debug info with no main source gives macro %s "
11468 macinfo_type
== DW_MACINFO_define
?
11470 macinfo_type
== DW_MACINFO_undef
?
11471 _("undefinition") :
11472 _("something-or-other"), line
, body
);
11475 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11476 complaint (&symfile_complaints
,
11477 _("debug info gives %s macro %s with %s line %d: %s"),
11478 at_commandline
? _("command-line") : _("in-file"),
11479 macinfo_type
== DW_MACINFO_define
?
11481 macinfo_type
== DW_MACINFO_undef
?
11482 _("undefinition") :
11483 _("something-or-other"),
11484 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11486 if (macinfo_type
== DW_MACINFO_define
)
11487 parse_macro_definition (current_file
, line
, body
);
11488 else if (macinfo_type
== DW_MACINFO_undef
)
11489 macro_undef (current_file
, line
, body
);
11493 case DW_MACINFO_start_file
:
11495 unsigned int bytes_read
;
11498 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11499 mac_ptr
+= bytes_read
;
11500 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11501 mac_ptr
+= bytes_read
;
11503 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11504 complaint (&symfile_complaints
,
11505 _("debug info gives source %d included "
11506 "from %s at %s line %d"),
11507 file
, at_commandline
? _("command-line") : _("file"),
11508 line
== 0 ? _("zero") : _("non-zero"), line
);
11510 if (at_commandline
)
11512 /* This DW_MACINFO_start_file was executed in the pass one. */
11513 at_commandline
= 0;
11516 current_file
= macro_start_file (file
, line
,
11517 current_file
, comp_dir
,
11522 case DW_MACINFO_end_file
:
11523 if (! current_file
)
11524 complaint (&symfile_complaints
,
11525 _("macro debug info has an unmatched `close_file' directive"));
11528 current_file
= current_file
->included_by
;
11529 if (! current_file
)
11531 enum dwarf_macinfo_record_type next_type
;
11533 /* GCC circa March 2002 doesn't produce the zero
11534 type byte marking the end of the compilation
11535 unit. Complain if it's not there, but exit no
11538 /* Do we at least have room for a macinfo type byte? */
11539 if (mac_ptr
>= mac_end
)
11541 dwarf2_macros_too_long_complaint ();
11545 /* We don't increment mac_ptr here, so this is just
11547 next_type
= read_1_byte (abfd
, mac_ptr
);
11548 if (next_type
!= 0)
11549 complaint (&symfile_complaints
,
11550 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11557 case DW_MACINFO_vendor_ext
:
11559 unsigned int bytes_read
;
11563 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11564 mac_ptr
+= bytes_read
;
11565 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11566 mac_ptr
+= bytes_read
;
11568 /* We don't recognize any vendor extensions. */
11572 } while (macinfo_type
!= 0);
11575 /* Check if the attribute's form is a DW_FORM_block*
11576 if so return true else false. */
11578 attr_form_is_block (struct attribute
*attr
)
11580 return (attr
== NULL
? 0 :
11581 attr
->form
== DW_FORM_block1
11582 || attr
->form
== DW_FORM_block2
11583 || attr
->form
== DW_FORM_block4
11584 || attr
->form
== DW_FORM_block
11585 || attr
->form
== DW_FORM_exprloc
);
11588 /* Return non-zero if ATTR's value is a section offset --- classes
11589 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11590 You may use DW_UNSND (attr) to retrieve such offsets.
11592 Section 7.5.4, "Attribute Encodings", explains that no attribute
11593 may have a value that belongs to more than one of these classes; it
11594 would be ambiguous if we did, because we use the same forms for all
11597 attr_form_is_section_offset (struct attribute
*attr
)
11599 return (attr
->form
== DW_FORM_data4
11600 || attr
->form
== DW_FORM_data8
11601 || attr
->form
== DW_FORM_sec_offset
);
11605 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11606 zero otherwise. When this function returns true, you can apply
11607 dwarf2_get_attr_constant_value to it.
11609 However, note that for some attributes you must check
11610 attr_form_is_section_offset before using this test. DW_FORM_data4
11611 and DW_FORM_data8 are members of both the constant class, and of
11612 the classes that contain offsets into other debug sections
11613 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11614 that, if an attribute's can be either a constant or one of the
11615 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11616 taken as section offsets, not constants. */
11618 attr_form_is_constant (struct attribute
*attr
)
11620 switch (attr
->form
)
11622 case DW_FORM_sdata
:
11623 case DW_FORM_udata
:
11624 case DW_FORM_data1
:
11625 case DW_FORM_data2
:
11626 case DW_FORM_data4
:
11627 case DW_FORM_data8
:
11635 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11636 struct dwarf2_cu
*cu
)
11638 if (attr_form_is_section_offset (attr
)
11639 /* ".debug_loc" may not exist at all, or the offset may be outside
11640 the section. If so, fall through to the complaint in the
11642 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11644 struct dwarf2_loclist_baton
*baton
;
11646 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11647 sizeof (struct dwarf2_loclist_baton
));
11648 baton
->per_cu
= cu
->per_cu
;
11649 gdb_assert (baton
->per_cu
);
11651 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11652 &dwarf2_per_objfile
->loc
);
11654 /* We don't know how long the location list is, but make sure we
11655 don't run off the edge of the section. */
11656 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11657 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11658 baton
->base_address
= cu
->base_address
;
11659 if (cu
->base_known
== 0)
11660 complaint (&symfile_complaints
,
11661 _("Location list used without specifying the CU base address."));
11663 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11664 SYMBOL_LOCATION_BATON (sym
) = baton
;
11668 struct dwarf2_locexpr_baton
*baton
;
11670 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11671 sizeof (struct dwarf2_locexpr_baton
));
11672 baton
->per_cu
= cu
->per_cu
;
11673 gdb_assert (baton
->per_cu
);
11675 if (attr_form_is_block (attr
))
11677 /* Note that we're just copying the block's data pointer
11678 here, not the actual data. We're still pointing into the
11679 info_buffer for SYM's objfile; right now we never release
11680 that buffer, but when we do clean up properly this may
11682 baton
->size
= DW_BLOCK (attr
)->size
;
11683 baton
->data
= DW_BLOCK (attr
)->data
;
11687 dwarf2_invalid_attrib_class_complaint ("location description",
11688 SYMBOL_NATURAL_NAME (sym
));
11690 baton
->data
= NULL
;
11693 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11694 SYMBOL_LOCATION_BATON (sym
) = baton
;
11698 /* Return the OBJFILE associated with the compilation unit CU. */
11701 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11703 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11705 /* Return the master objfile, so that we can report and look up the
11706 correct file containing this variable. */
11707 if (objfile
->separate_debug_objfile_backlink
)
11708 objfile
= objfile
->separate_debug_objfile_backlink
;
11713 /* Return the address size given in the compilation unit header for CU. */
11716 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11719 return per_cu
->cu
->header
.addr_size
;
11722 /* If the CU is not currently read in, we re-read its header. */
11723 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11724 struct dwarf2_per_objfile
*per_objfile
11725 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11726 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11727 struct comp_unit_head cu_header
;
11729 memset (&cu_header
, 0, sizeof cu_header
);
11730 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11731 return cu_header
.addr_size
;
11735 /* Locate the .debug_info compilation unit from CU's objfile which contains
11736 the DIE at OFFSET. Raises an error on failure. */
11738 static struct dwarf2_per_cu_data
*
11739 dwarf2_find_containing_comp_unit (unsigned int offset
,
11740 struct objfile
*objfile
)
11742 struct dwarf2_per_cu_data
*this_cu
;
11746 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11749 int mid
= low
+ (high
- low
) / 2;
11751 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11756 gdb_assert (low
== high
);
11757 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11760 error (_("Dwarf Error: could not find partial DIE containing "
11761 "offset 0x%lx [in module %s]"),
11762 (long) offset
, bfd_get_filename (objfile
->obfd
));
11764 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11765 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11769 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11770 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11771 && offset
>= this_cu
->offset
+ this_cu
->length
)
11772 error (_("invalid dwarf2 offset %u"), offset
);
11773 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11778 /* Locate the compilation unit from OBJFILE which is located at exactly
11779 OFFSET. Raises an error on failure. */
11781 static struct dwarf2_per_cu_data
*
11782 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11784 struct dwarf2_per_cu_data
*this_cu
;
11786 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11787 if (this_cu
->offset
!= offset
)
11788 error (_("no compilation unit with offset %u."), offset
);
11792 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11794 static struct dwarf2_cu
*
11795 alloc_one_comp_unit (struct objfile
*objfile
)
11797 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11798 cu
->objfile
= objfile
;
11799 obstack_init (&cu
->comp_unit_obstack
);
11803 /* Release one cached compilation unit, CU. We unlink it from the tree
11804 of compilation units, but we don't remove it from the read_in_chain;
11805 the caller is responsible for that.
11806 NOTE: DATA is a void * because this function is also used as a
11807 cleanup routine. */
11810 free_one_comp_unit (void *data
)
11812 struct dwarf2_cu
*cu
= data
;
11814 if (cu
->per_cu
!= NULL
)
11815 cu
->per_cu
->cu
= NULL
;
11818 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11823 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11824 when we're finished with it. We can't free the pointer itself, but be
11825 sure to unlink it from the cache. Also release any associated storage
11826 and perform cache maintenance.
11828 Only used during partial symbol parsing. */
11831 free_stack_comp_unit (void *data
)
11833 struct dwarf2_cu
*cu
= data
;
11835 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11836 cu
->partial_dies
= NULL
;
11838 if (cu
->per_cu
!= NULL
)
11840 /* This compilation unit is on the stack in our caller, so we
11841 should not xfree it. Just unlink it. */
11842 cu
->per_cu
->cu
= NULL
;
11845 /* If we had a per-cu pointer, then we may have other compilation
11846 units loaded, so age them now. */
11847 age_cached_comp_units ();
11851 /* Free all cached compilation units. */
11854 free_cached_comp_units (void *data
)
11856 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11858 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11859 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11860 while (per_cu
!= NULL
)
11862 struct dwarf2_per_cu_data
*next_cu
;
11864 next_cu
= per_cu
->cu
->read_in_chain
;
11866 free_one_comp_unit (per_cu
->cu
);
11867 *last_chain
= next_cu
;
11873 /* Increase the age counter on each cached compilation unit, and free
11874 any that are too old. */
11877 age_cached_comp_units (void)
11879 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11881 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11882 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11883 while (per_cu
!= NULL
)
11885 per_cu
->cu
->last_used
++;
11886 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11887 dwarf2_mark (per_cu
->cu
);
11888 per_cu
= per_cu
->cu
->read_in_chain
;
11891 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11892 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11893 while (per_cu
!= NULL
)
11895 struct dwarf2_per_cu_data
*next_cu
;
11897 next_cu
= per_cu
->cu
->read_in_chain
;
11899 if (!per_cu
->cu
->mark
)
11901 free_one_comp_unit (per_cu
->cu
);
11902 *last_chain
= next_cu
;
11905 last_chain
= &per_cu
->cu
->read_in_chain
;
11911 /* Remove a single compilation unit from the cache. */
11914 free_one_cached_comp_unit (void *target_cu
)
11916 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11918 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11919 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11920 while (per_cu
!= NULL
)
11922 struct dwarf2_per_cu_data
*next_cu
;
11924 next_cu
= per_cu
->cu
->read_in_chain
;
11926 if (per_cu
->cu
== target_cu
)
11928 free_one_comp_unit (per_cu
->cu
);
11929 *last_chain
= next_cu
;
11933 last_chain
= &per_cu
->cu
->read_in_chain
;
11939 /* Release all extra memory associated with OBJFILE. */
11942 dwarf2_free_objfile (struct objfile
*objfile
)
11944 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11946 if (dwarf2_per_objfile
== NULL
)
11949 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11950 free_cached_comp_units (NULL
);
11952 /* Everything else should be on the objfile obstack. */
11955 /* A pair of DIE offset and GDB type pointer. We store these
11956 in a hash table separate from the DIEs, and preserve them
11957 when the DIEs are flushed out of cache. */
11959 struct dwarf2_offset_and_type
11961 unsigned int offset
;
11965 /* Hash function for a dwarf2_offset_and_type. */
11968 offset_and_type_hash (const void *item
)
11970 const struct dwarf2_offset_and_type
*ofs
= item
;
11972 return ofs
->offset
;
11975 /* Equality function for a dwarf2_offset_and_type. */
11978 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11980 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11981 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11983 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11986 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11987 table if necessary. For convenience, return TYPE. */
11989 static struct type
*
11990 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11992 struct dwarf2_offset_and_type
**slot
, ofs
;
11994 /* For Ada types, make sure that the gnat-specific data is always
11995 initialized (if not already set). There are a few types where
11996 we should not be doing so, because the type-specific area is
11997 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11998 where the type-specific area is used to store the floatformat).
11999 But this is not a problem, because the gnat-specific information
12000 is actually not needed for these types. */
12001 if (need_gnat_info (cu
)
12002 && TYPE_CODE (type
) != TYPE_CODE_FUNC
12003 && TYPE_CODE (type
) != TYPE_CODE_FLT
12004 && !HAVE_GNAT_AUX_INFO (type
))
12005 INIT_GNAT_SPECIFIC (type
);
12007 if (cu
->type_hash
== NULL
)
12009 gdb_assert (cu
->per_cu
!= NULL
);
12010 cu
->per_cu
->type_hash
12011 = htab_create_alloc_ex (cu
->header
.length
/ 24,
12012 offset_and_type_hash
,
12013 offset_and_type_eq
,
12015 &cu
->objfile
->objfile_obstack
,
12016 hashtab_obstack_allocate
,
12017 dummy_obstack_deallocate
);
12018 cu
->type_hash
= cu
->per_cu
->type_hash
;
12021 ofs
.offset
= die
->offset
;
12023 slot
= (struct dwarf2_offset_and_type
**)
12024 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
12025 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
12030 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12031 not have a saved type. */
12033 static struct type
*
12034 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12036 struct dwarf2_offset_and_type
*slot
, ofs
;
12037 htab_t type_hash
= cu
->type_hash
;
12039 if (type_hash
== NULL
)
12042 ofs
.offset
= die
->offset
;
12043 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
12050 /* Add a dependence relationship from CU to REF_PER_CU. */
12053 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
12054 struct dwarf2_per_cu_data
*ref_per_cu
)
12058 if (cu
->dependencies
== NULL
)
12060 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
12061 NULL
, &cu
->comp_unit_obstack
,
12062 hashtab_obstack_allocate
,
12063 dummy_obstack_deallocate
);
12065 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12067 *slot
= ref_per_cu
;
12070 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12071 Set the mark field in every compilation unit in the
12072 cache that we must keep because we are keeping CU. */
12075 dwarf2_mark_helper (void **slot
, void *data
)
12077 struct dwarf2_per_cu_data
*per_cu
;
12079 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12080 if (per_cu
->cu
->mark
)
12082 per_cu
->cu
->mark
= 1;
12084 if (per_cu
->cu
->dependencies
!= NULL
)
12085 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12090 /* Set the mark field in CU and in every other compilation unit in the
12091 cache that we must keep because we are keeping CU. */
12094 dwarf2_mark (struct dwarf2_cu
*cu
)
12099 if (cu
->dependencies
!= NULL
)
12100 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12104 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12108 per_cu
->cu
->mark
= 0;
12109 per_cu
= per_cu
->cu
->read_in_chain
;
12113 /* Trivial hash function for partial_die_info: the hash value of a DIE
12114 is its offset in .debug_info for this objfile. */
12117 partial_die_hash (const void *item
)
12119 const struct partial_die_info
*part_die
= item
;
12121 return part_die
->offset
;
12124 /* Trivial comparison function for partial_die_info structures: two DIEs
12125 are equal if they have the same offset. */
12128 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12130 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12131 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12133 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12136 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12137 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12140 set_dwarf2_cmd (char *args
, int from_tty
)
12142 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12146 show_dwarf2_cmd (char *args
, int from_tty
)
12148 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12151 /* If section described by INFO was mmapped, munmap it now. */
12154 munmap_section_buffer (struct dwarf2_section_info
*info
)
12156 if (info
->was_mmapped
)
12159 intptr_t begin
= (intptr_t) info
->buffer
;
12160 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12161 size_t map_length
= info
->size
+ begin
- map_begin
;
12163 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12165 /* Without HAVE_MMAP, we should never be here to begin with. */
12171 /* munmap debug sections for OBJFILE, if necessary. */
12174 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12176 struct dwarf2_per_objfile
*data
= d
;
12178 munmap_section_buffer (&data
->info
);
12179 munmap_section_buffer (&data
->abbrev
);
12180 munmap_section_buffer (&data
->line
);
12181 munmap_section_buffer (&data
->str
);
12182 munmap_section_buffer (&data
->macinfo
);
12183 munmap_section_buffer (&data
->ranges
);
12184 munmap_section_buffer (&data
->loc
);
12185 munmap_section_buffer (&data
->frame
);
12186 munmap_section_buffer (&data
->eh_frame
);
12189 void _initialize_dwarf2_read (void);
12192 _initialize_dwarf2_read (void)
12194 dwarf2_objfile_data_key
12195 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12197 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12198 Set DWARF 2 specific variables.\n\
12199 Configure DWARF 2 variables such as the cache size"),
12200 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12201 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12203 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12204 Show DWARF 2 specific variables\n\
12205 Show DWARF 2 variables such as the cache size"),
12206 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12207 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12209 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12210 &dwarf2_max_cache_age
, _("\
12211 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12212 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12213 A higher limit means that cached compilation units will be stored\n\
12214 in memory longer, and more total memory will be used. Zero disables\n\
12215 caching, which can slow down startup."),
12217 show_dwarf2_max_cache_age
,
12218 &set_dwarf2_cmdlist
,
12219 &show_dwarf2_cmdlist
);
12221 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12222 Set debugging of the dwarf2 DIE reader."), _("\
12223 Show debugging of the dwarf2 DIE reader."), _("\
12224 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12225 The value is the maximum depth to print."),
12228 &setdebuglist
, &showdebuglist
);