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 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
51 #include "gdb_string.h"
52 #include "gdb_assert.h"
53 #include <sys/types.h>
58 /* A note on memory usage for this file.
60 At the present time, this code reads the debug info sections into
61 the objfile's objfile_obstack. A definite improvement for startup
62 time, on platforms which do not emit relocations for debug
63 sections, would be to use mmap instead. The object's complete
64 debug information is loaded into memory, partly to simplify
65 absolute DIE references.
67 Whether using obstacks or mmap, the sections should remain loaded
68 until the objfile is released, and pointers into the section data
69 can be used for any other data associated to the objfile (symbol
70 names, type names, location expressions to name a few). */
73 /* .debug_info header for a compilation unit
74 Because of alignment constraints, this structure has padding and cannot
75 be mapped directly onto the beginning of the .debug_info section. */
76 typedef struct comp_unit_header
78 unsigned int length
; /* length of the .debug_info
80 unsigned short version
; /* version number -- 2 for DWARF
82 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
83 unsigned char addr_size
; /* byte size of an address -- 4 */
86 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
89 /* .debug_pubnames header
90 Because of alignment constraints, this structure has padding and cannot
91 be mapped directly onto the beginning of the .debug_info section. */
92 typedef struct pubnames_header
94 unsigned int length
; /* length of the .debug_pubnames
96 unsigned char version
; /* version number -- 2 for DWARF
98 unsigned int info_offset
; /* offset into .debug_info section */
99 unsigned int info_size
; /* byte size of .debug_info section
103 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
105 /* .debug_pubnames header
106 Because of alignment constraints, this structure has padding and cannot
107 be mapped directly onto the beginning of the .debug_info section. */
108 typedef struct aranges_header
110 unsigned int length
; /* byte len of the .debug_aranges
112 unsigned short version
; /* version number -- 2 for DWARF
114 unsigned int info_offset
; /* offset into .debug_info section */
115 unsigned char addr_size
; /* byte size of an address */
116 unsigned char seg_size
; /* byte size of segment descriptor */
119 #define _ACTUAL_ARANGES_HEADER_SIZE 12
121 /* .debug_line statement program prologue
122 Because of alignment constraints, this structure has padding and cannot
123 be mapped directly onto the beginning of the .debug_info section. */
124 typedef struct statement_prologue
126 unsigned int total_length
; /* byte length of the statement
128 unsigned short version
; /* version number -- 2 for DWARF
130 unsigned int prologue_length
; /* # bytes between prologue &
132 unsigned char minimum_instruction_length
; /* byte size of
134 unsigned char default_is_stmt
; /* initial value of is_stmt
137 unsigned char line_range
;
138 unsigned char opcode_base
; /* number assigned to first special
140 unsigned char *standard_opcode_lengths
;
144 static const struct objfile_data
*dwarf2_objfile_data_key
;
146 struct dwarf2_per_objfile
148 /* Sizes of debugging sections. */
149 unsigned int info_size
;
150 unsigned int abbrev_size
;
151 unsigned int line_size
;
152 unsigned int pubnames_size
;
153 unsigned int aranges_size
;
154 unsigned int loc_size
;
155 unsigned int macinfo_size
;
156 unsigned int str_size
;
157 unsigned int ranges_size
;
158 unsigned int frame_size
;
159 unsigned int eh_frame_size
;
161 /* Loaded data from the sections. */
162 gdb_byte
*info_buffer
;
163 gdb_byte
*abbrev_buffer
;
164 gdb_byte
*line_buffer
;
165 gdb_byte
*str_buffer
;
166 gdb_byte
*macinfo_buffer
;
167 gdb_byte
*ranges_buffer
;
168 gdb_byte
*loc_buffer
;
170 /* A list of all the compilation units. This is used to locate
171 the target compilation unit of a particular reference. */
172 struct dwarf2_per_cu_data
**all_comp_units
;
174 /* The number of compilation units in ALL_COMP_UNITS. */
177 /* A chain of compilation units that are currently read in, so that
178 they can be freed later. */
179 struct dwarf2_per_cu_data
*read_in_chain
;
181 /* A flag indicating wether this objfile has a section loaded at a
183 int has_section_at_zero
;
186 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
188 static asection
*dwarf_info_section
;
189 static asection
*dwarf_abbrev_section
;
190 static asection
*dwarf_line_section
;
191 static asection
*dwarf_pubnames_section
;
192 static asection
*dwarf_aranges_section
;
193 static asection
*dwarf_loc_section
;
194 static asection
*dwarf_macinfo_section
;
195 static asection
*dwarf_str_section
;
196 static asection
*dwarf_ranges_section
;
197 asection
*dwarf_frame_section
;
198 asection
*dwarf_eh_frame_section
;
200 /* names of the debugging sections */
202 /* Note that if the debugging section has been compressed, it might
203 have a name like .zdebug_info. */
205 #define INFO_SECTION "debug_info"
206 #define ABBREV_SECTION "debug_abbrev"
207 #define LINE_SECTION "debug_line"
208 #define PUBNAMES_SECTION "debug_pubnames"
209 #define ARANGES_SECTION "debug_aranges"
210 #define LOC_SECTION "debug_loc"
211 #define MACINFO_SECTION "debug_macinfo"
212 #define STR_SECTION "debug_str"
213 #define RANGES_SECTION "debug_ranges"
214 #define FRAME_SECTION "debug_frame"
215 #define EH_FRAME_SECTION "eh_frame"
217 /* local data types */
219 /* We hold several abbreviation tables in memory at the same time. */
220 #ifndef ABBREV_HASH_SIZE
221 #define ABBREV_HASH_SIZE 121
224 /* The data in a compilation unit header, after target2host
225 translation, looks like this. */
226 struct comp_unit_head
228 unsigned long length
;
230 unsigned int abbrev_offset
;
231 unsigned char addr_size
;
232 unsigned char signed_addr_p
;
234 /* Size of file offsets; either 4 or 8. */
235 unsigned int offset_size
;
237 /* Size of the length field; either 4 or 12. */
238 unsigned int initial_length_size
;
240 /* Offset to the first byte of this compilation unit header in the
241 .debug_info section, for resolving relative reference dies. */
244 /* Pointer to this compilation unit header in the .debug_info
246 gdb_byte
*cu_head_ptr
;
248 /* Pointer to the first die of this compilation unit. This will be
249 the first byte following the compilation unit header. */
250 gdb_byte
*first_die_ptr
;
252 /* Pointer to the next compilation unit header in the program. */
253 struct comp_unit_head
*next
;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address
;
258 /* Non-zero if base_address has been set. */
262 /* Internal state when decoding a particular compilation unit. */
265 /* The objfile containing this compilation unit. */
266 struct objfile
*objfile
;
268 /* The header of the compilation unit.
270 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
271 should logically be moved to the dwarf2_cu structure. */
272 struct comp_unit_head header
;
274 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
276 /* The language we are debugging. */
277 enum language language
;
278 const struct language_defn
*language_defn
;
280 const char *producer
;
282 /* The generic symbol table building routines have separate lists for
283 file scope symbols and all all other scopes (local scopes). So
284 we need to select the right one to pass to add_symbol_to_list().
285 We do it by keeping a pointer to the correct list in list_in_scope.
287 FIXME: The original dwarf code just treated the file scope as the
288 first local scope, and all other local scopes as nested local
289 scopes, and worked fine. Check to see if we really need to
290 distinguish these in buildsym.c. */
291 struct pending
**list_in_scope
;
293 /* DWARF abbreviation table associated with this compilation unit. */
294 struct abbrev_info
**dwarf2_abbrevs
;
296 /* Storage for the abbrev table. */
297 struct obstack abbrev_obstack
;
299 /* Hash table holding all the loaded partial DIEs. */
302 /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */
303 unsigned long ranges_offset
;
305 /* Storage for things with the same lifetime as this read-in compilation
306 unit, including partial DIEs. */
307 struct obstack comp_unit_obstack
;
309 /* When multiple dwarf2_cu structures are living in memory, this field
310 chains them all together, so that they can be released efficiently.
311 We will probably also want a generation counter so that most-recently-used
312 compilation units are cached... */
313 struct dwarf2_per_cu_data
*read_in_chain
;
315 /* Backchain to our per_cu entry if the tree has been built. */
316 struct dwarf2_per_cu_data
*per_cu
;
318 /* Pointer to the die -> type map. Although it is stored
319 permanently in per_cu, we copy it here to avoid double
323 /* How many compilation units ago was this CU last referenced? */
326 /* A hash table of die offsets for following references. */
329 /* Full DIEs if read in. */
330 struct die_info
*dies
;
332 /* A set of pointers to dwarf2_per_cu_data objects for compilation
333 units referenced by this one. Only set during full symbol processing;
334 partial symbol tables do not have dependencies. */
337 /* Header data from the line table, during full symbol processing. */
338 struct line_header
*line_header
;
340 /* Mark used when releasing cached dies. */
341 unsigned int mark
: 1;
343 /* This flag will be set if this compilation unit might include
344 inter-compilation-unit references. */
345 unsigned int has_form_ref_addr
: 1;
347 /* This flag will be set if this compilation unit includes any
348 DW_TAG_namespace DIEs. If we know that there are explicit
349 DIEs for namespaces, we don't need to try to infer them
350 from mangled names. */
351 unsigned int has_namespace_info
: 1;
353 /* Field `ranges_offset' is filled in; flag as the value may be zero. */
354 unsigned int has_ranges_offset
: 1;
357 /* Persistent data held for a compilation unit, even when not
358 processing it. We put a pointer to this structure in the
359 read_symtab_private field of the psymtab. If we encounter
360 inter-compilation-unit references, we also maintain a sorted
361 list of all compilation units. */
363 struct dwarf2_per_cu_data
365 /* The start offset and length of this compilation unit. 2**30-1
366 bytes should suffice to store the length of any compilation unit
367 - if it doesn't, GDB will fall over anyway. */
368 unsigned long offset
;
369 unsigned long length
: 30;
371 /* Flag indicating this compilation unit will be read in before
372 any of the current compilation units are processed. */
373 unsigned long queued
: 1;
375 /* This flag will be set if we need to load absolutely all DIEs
376 for this compilation unit, instead of just the ones we think
377 are interesting. It gets set if we look for a DIE in the
378 hash table and don't find it. */
379 unsigned int load_all_dies
: 1;
381 /* Set iff currently read in. */
382 struct dwarf2_cu
*cu
;
384 /* If full symbols for this CU have been read in, then this field
385 holds a map of DIE offsets to types. It isn't always possible
386 to reconstruct this information later, so we have to preserve
390 /* The partial symbol table associated with this compilation unit,
391 or NULL for partial units (which do not have an associated
393 struct partial_symtab
*psymtab
;
396 /* The line number information for a compilation unit (found in the
397 .debug_line section) begins with a "statement program header",
398 which contains the following information. */
401 unsigned int total_length
;
402 unsigned short version
;
403 unsigned int header_length
;
404 unsigned char minimum_instruction_length
;
405 unsigned char default_is_stmt
;
407 unsigned char line_range
;
408 unsigned char opcode_base
;
410 /* standard_opcode_lengths[i] is the number of operands for the
411 standard opcode whose value is i. This means that
412 standard_opcode_lengths[0] is unused, and the last meaningful
413 element is standard_opcode_lengths[opcode_base - 1]. */
414 unsigned char *standard_opcode_lengths
;
416 /* The include_directories table. NOTE! These strings are not
417 allocated with xmalloc; instead, they are pointers into
418 debug_line_buffer. If you try to free them, `free' will get
420 unsigned int num_include_dirs
, include_dirs_size
;
423 /* The file_names table. NOTE! These strings are not allocated
424 with xmalloc; instead, they are pointers into debug_line_buffer.
425 Don't try to free them directly. */
426 unsigned int num_file_names
, file_names_size
;
430 unsigned int dir_index
;
431 unsigned int mod_time
;
433 int included_p
; /* Non-zero if referenced by the Line Number Program. */
434 struct symtab
*symtab
; /* The associated symbol table, if any. */
437 /* The start and end of the statement program following this
438 header. These point into dwarf2_per_objfile->line_buffer. */
439 gdb_byte
*statement_program_start
, *statement_program_end
;
442 /* When we construct a partial symbol table entry we only
443 need this much information. */
444 struct partial_die_info
446 /* Offset of this DIE. */
449 /* DWARF-2 tag for this DIE. */
450 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
452 /* Language code associated with this DIE. This is only used
453 for the compilation unit DIE. */
454 unsigned int language
: 8;
456 /* Assorted flags describing the data found in this DIE. */
457 unsigned int has_children
: 1;
458 unsigned int is_external
: 1;
459 unsigned int is_declaration
: 1;
460 unsigned int has_type
: 1;
461 unsigned int has_specification
: 1;
462 unsigned int has_stmt_list
: 1;
463 unsigned int has_pc_info
: 1;
465 /* Flag set if the SCOPE field of this structure has been
467 unsigned int scope_set
: 1;
469 /* Flag set if the DIE has a byte_size attribute. */
470 unsigned int has_byte_size
: 1;
472 /* The name of this DIE. Normally the value of DW_AT_name, but
473 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
478 /* The scope to prepend to our children. This is generally
479 allocated on the comp_unit_obstack, so will disappear
480 when this compilation unit leaves the cache. */
483 /* The location description associated with this DIE, if any. */
484 struct dwarf_block
*locdesc
;
486 /* If HAS_PC_INFO, the PC range associated with this DIE. */
490 /* Pointer into the info_buffer pointing at the target of
491 DW_AT_sibling, if any. */
494 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
495 DW_AT_specification (or DW_AT_abstract_origin or
497 unsigned int spec_offset
;
499 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
500 unsigned int line_offset
;
502 /* Pointers to this DIE's parent, first child, and next sibling,
504 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
507 /* This data structure holds the information of an abbrev. */
510 unsigned int number
; /* number identifying abbrev */
511 enum dwarf_tag tag
; /* dwarf tag */
512 unsigned short has_children
; /* boolean */
513 unsigned short num_attrs
; /* number of attributes */
514 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
515 struct abbrev_info
*next
; /* next in chain */
520 enum dwarf_attribute name
;
521 enum dwarf_form form
;
524 /* Attributes have a name and a value */
527 enum dwarf_attribute name
;
528 enum dwarf_form form
;
532 struct dwarf_block
*blk
;
540 /* This data structure holds a complete die structure. */
543 enum dwarf_tag tag
; /* Tag indicating type of die */
544 unsigned int abbrev
; /* Abbrev number */
545 unsigned int offset
; /* Offset in .debug_info section */
546 unsigned int num_attrs
; /* Number of attributes */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info
*child
; /* Its first child, if any. */
554 struct die_info
*sibling
; /* Its next sibling, if any. */
555 struct die_info
*parent
; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs
[1];
563 struct function_range
566 CORE_ADDR lowpc
, highpc
;
568 struct function_range
*next
;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
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)
579 /* Blocks are a bunch of untyped bytes. */
586 #ifndef ATTR_ALLOC_CHUNK
587 #define ATTR_ALLOC_CHUNK 4
590 /* Allocate fields for structs, unions and enums in this size. */
591 #ifndef DW_FIELD_ALLOC_CHUNK
592 #define DW_FIELD_ALLOC_CHUNK 4
595 /* A zeroed version of a partial die for initialization purposes. */
596 static struct partial_die_info zeroed_partial_die
;
598 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
599 but this would require a corresponding change in unpack_field_as_long
601 static int bits_per_byte
= 8;
603 /* The routines that read and process dies for a C struct or C++ class
604 pass lists of data member fields and lists of member function fields
605 in an instance of a field_info structure, as defined below. */
608 /* List of data member and baseclasses fields. */
611 struct nextfield
*next
;
618 /* Number of fields. */
621 /* Number of baseclasses. */
624 /* Set if the accesibility of one of the fields is not public. */
625 int non_public_fields
;
627 /* Member function fields array, entries are allocated in the order they
628 are encountered in the object file. */
631 struct nextfnfield
*next
;
632 struct fn_field fnfield
;
636 /* Member function fieldlist array, contains name of possibly overloaded
637 member function, number of overloaded member functions and a pointer
638 to the head of the member function field chain. */
643 struct nextfnfield
*head
;
647 /* Number of entries in the fnfieldlists array. */
651 /* One item on the queue of compilation units to read in full symbols
653 struct dwarf2_queue_item
655 struct dwarf2_per_cu_data
*per_cu
;
656 struct dwarf2_queue_item
*next
;
659 /* The current queue. */
660 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
662 /* Loaded secondary compilation units are kept in memory until they
663 have not been referenced for the processing of this many
664 compilation units. Set this to zero to disable caching. Cache
665 sizes of up to at least twenty will improve startup time for
666 typical inter-CU-reference binaries, at an obvious memory cost. */
667 static int dwarf2_max_cache_age
= 5;
669 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
670 struct cmd_list_element
*c
, const char *value
)
672 fprintf_filtered (file
, _("\
673 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
678 /* Various complaints about symbol reading that don't abort the process */
681 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
683 complaint (&symfile_complaints
,
684 _("statement list doesn't fit in .debug_line section"));
688 dwarf2_debug_line_missing_file_complaint (void)
690 complaint (&symfile_complaints
,
691 _(".debug_line section has line data without a file"));
695 dwarf2_complex_location_expr_complaint (void)
697 complaint (&symfile_complaints
, _("location expression too complex"));
701 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
704 complaint (&symfile_complaints
,
705 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
710 dwarf2_macros_too_long_complaint (void)
712 complaint (&symfile_complaints
,
713 _("macro info runs off end of `.debug_macinfo' section"));
717 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
719 complaint (&symfile_complaints
,
720 _("macro debug info contains a malformed macro definition:\n`%s'"),
725 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
727 complaint (&symfile_complaints
,
728 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
731 /* local function prototypes */
733 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
736 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
739 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
742 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
743 struct partial_die_info
*,
744 struct partial_symtab
*);
746 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
748 static void scan_partial_symbols (struct partial_die_info
*,
749 CORE_ADDR
*, CORE_ADDR
*,
752 static void add_partial_symbol (struct partial_die_info
*,
755 static int pdi_needs_namespace (enum dwarf_tag tag
);
757 static void add_partial_namespace (struct partial_die_info
*pdi
,
758 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
759 struct dwarf2_cu
*cu
);
761 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
762 struct dwarf2_cu
*cu
);
764 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
767 struct dwarf2_cu
*cu
);
769 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
771 static void psymtab_to_symtab_1 (struct partial_symtab
*);
773 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
775 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
777 static void dwarf2_free_abbrev_table (void *);
779 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
782 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
785 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
788 static gdb_byte
*read_partial_die (struct partial_die_info
*,
789 struct abbrev_info
*abbrev
, unsigned int,
790 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
792 static struct partial_die_info
*find_partial_die (unsigned long,
795 static void fixup_partial_die (struct partial_die_info
*,
798 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
799 struct dwarf2_cu
*, int *);
801 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
802 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
804 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
805 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
807 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
809 static int read_1_signed_byte (bfd
*, gdb_byte
*);
811 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
813 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
815 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
817 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
820 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
821 struct comp_unit_head
*, unsigned int *);
823 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
826 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
828 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
830 static char *read_indirect_string (bfd
*, gdb_byte
*,
831 const struct comp_unit_head
*,
834 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
836 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
838 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
840 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
842 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
845 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
846 struct dwarf2_cu
*cu
);
848 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
850 static struct die_info
*die_specification (struct die_info
*die
,
853 static void free_line_header (struct line_header
*lh
);
855 static void add_file_name (struct line_header
*, char *, unsigned int,
856 unsigned int, unsigned int);
858 static struct line_header
*(dwarf_decode_line_header
859 (unsigned int offset
,
860 bfd
*abfd
, struct dwarf2_cu
*cu
));
862 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
863 struct dwarf2_cu
*, struct partial_symtab
*);
865 static void dwarf2_start_subfile (char *, char *, char *);
867 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
870 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
873 static void dwarf2_const_value_data (struct attribute
*attr
,
877 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
879 static struct type
*die_containing_type (struct die_info
*,
882 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
884 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
886 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
888 static char *typename_concat (struct obstack
*,
893 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
895 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
897 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
899 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
900 struct dwarf2_cu
*, struct partial_symtab
*);
902 static int dwarf2_get_pc_bounds (struct die_info
*,
903 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
905 static void get_scope_pc_bounds (struct die_info
*,
906 CORE_ADDR
*, CORE_ADDR
*,
909 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
910 CORE_ADDR
, struct dwarf2_cu
*);
912 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
915 static void dwarf2_attach_fields_to_type (struct field_info
*,
916 struct type
*, struct dwarf2_cu
*);
918 static void dwarf2_add_member_fn (struct field_info
*,
919 struct die_info
*, struct type
*,
922 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
923 struct type
*, struct dwarf2_cu
*);
925 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
927 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
929 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
931 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
933 static const char *namespace_name (struct die_info
*die
,
934 int *is_anonymous
, struct dwarf2_cu
*);
936 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
938 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
940 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
943 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
945 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
947 gdb_byte
**new_info_ptr
,
948 struct die_info
*parent
);
950 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
952 gdb_byte
**new_info_ptr
,
953 struct die_info
*parent
);
955 static void process_die (struct die_info
*, struct dwarf2_cu
*);
957 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
959 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
961 static struct die_info
*dwarf2_extension (struct die_info
*die
,
964 static char *dwarf_tag_name (unsigned int);
966 static char *dwarf_attr_name (unsigned int);
968 static char *dwarf_form_name (unsigned int);
970 static char *dwarf_stack_op_name (unsigned int);
972 static char *dwarf_bool_name (unsigned int);
974 static char *dwarf_type_encoding_name (unsigned int);
977 static char *dwarf_cfi_name (unsigned int);
980 static struct die_info
*sibling_die (struct die_info
*);
982 static void dump_die (struct die_info
*);
984 static void dump_die_list (struct die_info
*);
986 static void store_in_ref_table (struct die_info
*,
989 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
992 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
994 static struct die_info
*follow_die_ref (struct die_info
*,
998 /* memory allocation interface */
1000 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1002 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1004 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1006 static void initialize_cu_func_list (struct dwarf2_cu
*);
1008 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1009 struct dwarf2_cu
*);
1011 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1012 char *, bfd
*, struct dwarf2_cu
*);
1014 static int attr_form_is_block (struct attribute
*);
1016 static int attr_form_is_section_offset (struct attribute
*);
1018 static int attr_form_is_constant (struct attribute
*);
1020 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1022 struct dwarf2_cu
*cu
);
1024 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1025 struct dwarf2_cu
*cu
);
1027 static void free_stack_comp_unit (void *);
1029 static hashval_t
partial_die_hash (const void *item
);
1031 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1033 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1034 (unsigned long offset
, struct objfile
*objfile
);
1036 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1037 (unsigned long offset
, struct objfile
*objfile
);
1039 static void free_one_comp_unit (void *);
1041 static void free_cached_comp_units (void *);
1043 static void age_cached_comp_units (void);
1045 static void free_one_cached_comp_unit (void *);
1047 static struct type
*set_die_type (struct die_info
*, struct type
*,
1048 struct dwarf2_cu
*);
1050 static void create_all_comp_units (struct objfile
*);
1052 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1055 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1057 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1058 struct dwarf2_per_cu_data
*);
1060 static void dwarf2_mark (struct dwarf2_cu
*);
1062 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1064 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1066 /* Try to locate the sections we need for DWARF 2 debugging
1067 information and return true if we have enough to do something. */
1070 dwarf2_has_info (struct objfile
*objfile
)
1072 struct dwarf2_per_objfile
*data
;
1074 /* Initialize per-objfile state. */
1075 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1076 memset (data
, 0, sizeof (*data
));
1077 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1078 dwarf2_per_objfile
= data
;
1080 dwarf_info_section
= 0;
1081 dwarf_abbrev_section
= 0;
1082 dwarf_line_section
= 0;
1083 dwarf_str_section
= 0;
1084 dwarf_macinfo_section
= 0;
1085 dwarf_frame_section
= 0;
1086 dwarf_eh_frame_section
= 0;
1087 dwarf_ranges_section
= 0;
1088 dwarf_loc_section
= 0;
1090 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1091 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1094 /* When loading sections, we can either look for ".<name>", or for
1095 * ".z<name>", which indicates a compressed section. */
1098 section_is_p (asection
*sectp
, const char *name
)
1100 return ((sectp
->name
[0] == '.'
1101 && strcmp (sectp
->name
+ 1, name
) == 0)
1102 || (sectp
->name
[0] == '.' && sectp
->name
[1] == 'z'
1103 && strcmp (sectp
->name
+ 2, name
) == 0));
1106 /* This function is mapped across the sections and remembers the
1107 offset and size of each of the debugging sections we are interested
1111 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1113 if (section_is_p (sectp
, INFO_SECTION
))
1115 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1116 dwarf_info_section
= sectp
;
1118 else if (section_is_p (sectp
, ABBREV_SECTION
))
1120 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1121 dwarf_abbrev_section
= sectp
;
1123 else if (section_is_p (sectp
, LINE_SECTION
))
1125 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1126 dwarf_line_section
= sectp
;
1128 else if (section_is_p (sectp
, PUBNAMES_SECTION
))
1130 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1131 dwarf_pubnames_section
= sectp
;
1133 else if (section_is_p (sectp
, ARANGES_SECTION
))
1135 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1136 dwarf_aranges_section
= sectp
;
1138 else if (section_is_p (sectp
, LOC_SECTION
))
1140 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1141 dwarf_loc_section
= sectp
;
1143 else if (section_is_p (sectp
, MACINFO_SECTION
))
1145 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1146 dwarf_macinfo_section
= sectp
;
1148 else if (section_is_p (sectp
, STR_SECTION
))
1150 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1151 dwarf_str_section
= sectp
;
1153 else if (section_is_p (sectp
, FRAME_SECTION
))
1155 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1156 dwarf_frame_section
= sectp
;
1158 else if (section_is_p (sectp
, EH_FRAME_SECTION
))
1160 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1161 if (aflag
& SEC_HAS_CONTENTS
)
1163 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1164 dwarf_eh_frame_section
= sectp
;
1167 else if (section_is_p (sectp
, RANGES_SECTION
))
1169 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1170 dwarf_ranges_section
= sectp
;
1173 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1174 && bfd_section_vma (abfd
, sectp
) == 0)
1175 dwarf2_per_objfile
->has_section_at_zero
= 1;
1178 /* This function is called after decompressing a section, so
1179 dwarf2_per_objfile can record its new, uncompressed size. */
1182 dwarf2_resize_section (asection
*sectp
, bfd_size_type new_size
)
1184 if (section_is_p (sectp
, INFO_SECTION
))
1185 dwarf2_per_objfile
->info_size
= new_size
;
1186 else if (section_is_p (sectp
, ABBREV_SECTION
))
1187 dwarf2_per_objfile
->abbrev_size
= new_size
;
1188 else if (section_is_p (sectp
, LINE_SECTION
))
1189 dwarf2_per_objfile
->line_size
= new_size
;
1190 else if (section_is_p (sectp
, PUBNAMES_SECTION
))
1191 dwarf2_per_objfile
->pubnames_size
= new_size
;
1192 else if (section_is_p (sectp
, ARANGES_SECTION
))
1193 dwarf2_per_objfile
->aranges_size
= new_size
;
1194 else if (section_is_p (sectp
, LOC_SECTION
))
1195 dwarf2_per_objfile
->loc_size
= new_size
;
1196 else if (section_is_p (sectp
, MACINFO_SECTION
))
1197 dwarf2_per_objfile
->macinfo_size
= new_size
;
1198 else if (section_is_p (sectp
, STR_SECTION
))
1199 dwarf2_per_objfile
->str_size
= new_size
;
1200 else if (section_is_p (sectp
, FRAME_SECTION
))
1201 dwarf2_per_objfile
->frame_size
= new_size
;
1202 else if (section_is_p (sectp
, EH_FRAME_SECTION
))
1203 dwarf2_per_objfile
->eh_frame_size
= new_size
;
1204 else if (section_is_p (sectp
, RANGES_SECTION
))
1205 dwarf2_per_objfile
->ranges_size
= new_size
;
1207 internal_error (__FILE__
, __LINE__
,
1208 _("dwarf2_resize_section: missing section_is_p check: %s"),
1212 /* Build a partial symbol table. */
1215 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1217 /* We definitely need the .debug_info and .debug_abbrev sections */
1219 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1220 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1222 if (dwarf_line_section
)
1223 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1225 dwarf2_per_objfile
->line_buffer
= NULL
;
1227 if (dwarf_str_section
)
1228 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1230 dwarf2_per_objfile
->str_buffer
= NULL
;
1232 if (dwarf_macinfo_section
)
1233 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1234 dwarf_macinfo_section
);
1236 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1238 if (dwarf_ranges_section
)
1239 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1241 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1243 if (dwarf_loc_section
)
1244 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1246 dwarf2_per_objfile
->loc_buffer
= NULL
;
1249 || (objfile
->global_psymbols
.size
== 0
1250 && objfile
->static_psymbols
.size
== 0))
1252 init_psymbol_list (objfile
, 1024);
1256 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1258 /* Things are significantly easier if we have .debug_aranges and
1259 .debug_pubnames sections */
1261 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1265 /* only test this case for now */
1267 /* In this case we have to work a bit harder */
1268 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1273 /* Build the partial symbol table from the information in the
1274 .debug_pubnames and .debug_aranges sections. */
1277 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1279 bfd
*abfd
= objfile
->obfd
;
1280 char *aranges_buffer
, *pubnames_buffer
;
1281 char *aranges_ptr
, *pubnames_ptr
;
1282 unsigned int entry_length
, version
, info_offset
, info_size
;
1284 pubnames_buffer
= dwarf2_read_section (objfile
,
1285 dwarf_pubnames_section
);
1286 pubnames_ptr
= pubnames_buffer
;
1287 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1289 struct comp_unit_head cu_header
;
1290 unsigned int bytes_read
;
1292 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1294 pubnames_ptr
+= bytes_read
;
1295 version
= read_1_byte (abfd
, pubnames_ptr
);
1297 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1299 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1303 aranges_buffer
= dwarf2_read_section (objfile
,
1304 dwarf_aranges_section
);
1309 /* Read in the comp unit header information from the debug_info at
1313 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1314 gdb_byte
*info_ptr
, bfd
*abfd
)
1317 unsigned int bytes_read
;
1318 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1320 info_ptr
+= bytes_read
;
1321 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1323 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1325 info_ptr
+= bytes_read
;
1326 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1328 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1329 if (signed_addr
< 0)
1330 internal_error (__FILE__
, __LINE__
,
1331 _("read_comp_unit_head: dwarf from non elf file"));
1332 cu_header
->signed_addr_p
= signed_addr
;
1337 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1340 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1342 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1344 if (header
->version
!= 2 && header
->version
!= 3)
1345 error (_("Dwarf Error: wrong version in compilation unit header "
1346 "(is %d, should be %d) [in module %s]"), header
->version
,
1347 2, bfd_get_filename (abfd
));
1349 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1350 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1351 "(offset 0x%lx + 6) [in module %s]"),
1352 (long) header
->abbrev_offset
,
1353 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1354 bfd_get_filename (abfd
));
1356 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1357 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1358 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1359 "(offset 0x%lx + 0) [in module %s]"),
1360 (long) header
->length
,
1361 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1362 bfd_get_filename (abfd
));
1367 /* Allocate a new partial symtab for file named NAME and mark this new
1368 partial symtab as being an include of PST. */
1371 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1372 struct objfile
*objfile
)
1374 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1376 subpst
->section_offsets
= pst
->section_offsets
;
1377 subpst
->textlow
= 0;
1378 subpst
->texthigh
= 0;
1380 subpst
->dependencies
= (struct partial_symtab
**)
1381 obstack_alloc (&objfile
->objfile_obstack
,
1382 sizeof (struct partial_symtab
*));
1383 subpst
->dependencies
[0] = pst
;
1384 subpst
->number_of_dependencies
= 1;
1386 subpst
->globals_offset
= 0;
1387 subpst
->n_global_syms
= 0;
1388 subpst
->statics_offset
= 0;
1389 subpst
->n_static_syms
= 0;
1390 subpst
->symtab
= NULL
;
1391 subpst
->read_symtab
= pst
->read_symtab
;
1394 /* No private part is necessary for include psymtabs. This property
1395 can be used to differentiate between such include psymtabs and
1396 the regular ones. */
1397 subpst
->read_symtab_private
= NULL
;
1400 /* Read the Line Number Program data and extract the list of files
1401 included by the source file represented by PST. Build an include
1402 partial symtab for each of these included files.
1404 This procedure assumes that there *is* a Line Number Program in
1405 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1406 before calling this procedure. */
1409 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1410 struct partial_die_info
*pdi
,
1411 struct partial_symtab
*pst
)
1413 struct objfile
*objfile
= cu
->objfile
;
1414 bfd
*abfd
= objfile
->obfd
;
1415 struct line_header
*lh
;
1417 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1419 return; /* No linetable, so no includes. */
1421 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1423 free_line_header (lh
);
1427 /* Build the partial symbol table by doing a quick pass through the
1428 .debug_info and .debug_abbrev sections. */
1431 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1433 /* Instead of reading this into a big buffer, we should probably use
1434 mmap() on architectures that support it. (FIXME) */
1435 bfd
*abfd
= objfile
->obfd
;
1437 gdb_byte
*beg_of_comp_unit
;
1438 struct partial_die_info comp_unit_die
;
1439 struct partial_symtab
*pst
;
1440 struct cleanup
*back_to
;
1441 CORE_ADDR lowpc
, highpc
, baseaddr
;
1443 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1445 /* Any cached compilation units will be linked by the per-objfile
1446 read_in_chain. Make sure to free them when we're done. */
1447 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1449 create_all_comp_units (objfile
);
1451 objfile
->psymtabs_addrmap
= addrmap_create_mutable
1452 (&objfile
->objfile_obstack
);
1454 /* Since the objects we're extracting from .debug_info vary in
1455 length, only the individual functions to extract them (like
1456 read_comp_unit_head and load_partial_die) can really know whether
1457 the buffer is large enough to hold another complete object.
1459 At the moment, they don't actually check that. If .debug_info
1460 holds just one extra byte after the last compilation unit's dies,
1461 then read_comp_unit_head will happily read off the end of the
1462 buffer. read_partial_die is similarly casual. Those functions
1465 For this loop condition, simply checking whether there's any data
1466 left at all should be sufficient. */
1467 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1468 + dwarf2_per_objfile
->info_size
))
1470 struct cleanup
*back_to_inner
;
1471 struct dwarf2_cu cu
;
1472 struct abbrev_info
*abbrev
;
1473 unsigned int bytes_read
;
1474 struct dwarf2_per_cu_data
*this_cu
;
1476 beg_of_comp_unit
= info_ptr
;
1478 memset (&cu
, 0, sizeof (cu
));
1480 obstack_init (&cu
.comp_unit_obstack
);
1482 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1484 cu
.objfile
= objfile
;
1485 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1487 /* Complete the cu_header */
1488 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1489 cu
.header
.first_die_ptr
= info_ptr
;
1490 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1492 cu
.list_in_scope
= &file_symbols
;
1494 /* Read the abbrevs for this compilation unit into a table */
1495 dwarf2_read_abbrevs (abfd
, &cu
);
1496 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1498 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1500 /* Read the compilation unit die */
1501 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1502 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1503 abfd
, info_ptr
, &cu
);
1505 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1507 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1508 + cu
.header
.initial_length_size
);
1509 do_cleanups (back_to_inner
);
1513 /* Set the language we're debugging */
1514 set_cu_language (comp_unit_die
.language
, &cu
);
1516 /* Allocate a new partial symbol table structure */
1517 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1518 comp_unit_die
.name
? comp_unit_die
.name
: "",
1519 /* TEXTLOW and TEXTHIGH are set below. */
1521 objfile
->global_psymbols
.next
,
1522 objfile
->static_psymbols
.next
);
1524 if (comp_unit_die
.dirname
)
1525 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1527 pst
->read_symtab_private
= (char *) this_cu
;
1529 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1531 /* Store the function that reads in the rest of the symbol table */
1532 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1534 /* If this compilation unit was already read in, free the
1535 cached copy in order to read it in again. This is
1536 necessary because we skipped some symbols when we first
1537 read in the compilation unit (see load_partial_dies).
1538 This problem could be avoided, but the benefit is
1540 if (this_cu
->cu
!= NULL
)
1541 free_one_cached_comp_unit (this_cu
->cu
);
1543 cu
.per_cu
= this_cu
;
1545 /* Note that this is a pointer to our stack frame, being
1546 added to a global data structure. It will be cleaned up
1547 in free_stack_comp_unit when we finish with this
1548 compilation unit. */
1551 this_cu
->psymtab
= pst
;
1553 /* Possibly set the default values of LOWPC and HIGHPC from
1555 if (cu
.has_ranges_offset
)
1557 if (dwarf2_ranges_read (cu
.ranges_offset
, &comp_unit_die
.lowpc
,
1558 &comp_unit_die
.highpc
, &cu
, pst
))
1559 comp_unit_die
.has_pc_info
= 1;
1562 /* Check if comp unit has_children.
1563 If so, read the rest of the partial symbols from this comp unit.
1564 If not, there's no more debug_info for this comp unit. */
1565 if (comp_unit_die
.has_children
)
1567 struct partial_die_info
*first_die
;
1569 lowpc
= ((CORE_ADDR
) -1);
1570 highpc
= ((CORE_ADDR
) 0);
1572 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1574 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1576 /* If we didn't find a lowpc, set it to highpc to avoid
1577 complaints from `maint check'. */
1578 if (lowpc
== ((CORE_ADDR
) -1))
1581 /* If the compilation unit didn't have an explicit address range,
1582 then use the information extracted from its child dies. */
1583 if (! comp_unit_die
.has_pc_info
)
1585 comp_unit_die
.lowpc
= lowpc
;
1586 comp_unit_die
.highpc
= highpc
;
1589 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1590 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1592 /* Store the contiguous range; `DW_AT_ranges' range is stored above. The
1593 range can be also empty for CUs with no code. */
1594 if (!cu
.has_ranges_offset
&& pst
->textlow
< pst
->texthigh
)
1595 addrmap_set_empty (objfile
->psymtabs_addrmap
, pst
->textlow
,
1596 pst
->texthigh
- 1, pst
);
1598 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1599 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1600 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1601 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1602 sort_pst_symbols (pst
);
1604 /* If there is already a psymtab or symtab for a file of this
1605 name, remove it. (If there is a symtab, more drastic things
1606 also happen.) This happens in VxWorks. */
1607 free_named_symtabs (pst
->filename
);
1609 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1610 + cu
.header
.initial_length_size
;
1612 if (comp_unit_die
.has_stmt_list
)
1614 /* Get the list of files included in the current compilation unit,
1615 and build a psymtab for each of them. */
1616 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1619 do_cleanups (back_to_inner
);
1622 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
1623 &objfile
->objfile_obstack
);
1625 do_cleanups (back_to
);
1628 /* Load the DIEs for a secondary CU into memory. */
1631 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1633 bfd
*abfd
= objfile
->obfd
;
1634 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1635 struct partial_die_info comp_unit_die
;
1636 struct dwarf2_cu
*cu
;
1637 struct abbrev_info
*abbrev
;
1638 unsigned int bytes_read
;
1639 struct cleanup
*back_to
;
1641 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1642 beg_of_comp_unit
= info_ptr
;
1644 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1645 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1647 obstack_init (&cu
->comp_unit_obstack
);
1649 cu
->objfile
= objfile
;
1650 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1652 /* Complete the cu_header. */
1653 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1654 cu
->header
.first_die_ptr
= info_ptr
;
1655 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1657 /* Read the abbrevs for this compilation unit into a table. */
1658 dwarf2_read_abbrevs (abfd
, cu
);
1659 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1661 /* Read the compilation unit die. */
1662 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1663 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1664 abfd
, info_ptr
, cu
);
1666 /* Set the language we're debugging. */
1667 set_cu_language (comp_unit_die
.language
, cu
);
1669 /* Link this compilation unit into the compilation unit tree. */
1671 cu
->per_cu
= this_cu
;
1672 cu
->type_hash
= cu
->per_cu
->type_hash
;
1674 /* Check if comp unit has_children.
1675 If so, read the rest of the partial symbols from this comp unit.
1676 If not, there's no more debug_info for this comp unit. */
1677 if (comp_unit_die
.has_children
)
1678 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1680 do_cleanups (back_to
);
1683 /* Create a list of all compilation units in OBJFILE. We do this only
1684 if an inter-comp-unit reference is found; presumably if there is one,
1685 there will be many, and one will occur early in the .debug_info section.
1686 So there's no point in building this list incrementally. */
1689 create_all_comp_units (struct objfile
*objfile
)
1693 struct dwarf2_per_cu_data
**all_comp_units
;
1694 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1698 all_comp_units
= xmalloc (n_allocated
1699 * sizeof (struct dwarf2_per_cu_data
*));
1701 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1703 struct comp_unit_head cu_header
;
1704 gdb_byte
*beg_of_comp_unit
;
1705 struct dwarf2_per_cu_data
*this_cu
;
1706 unsigned long offset
;
1707 unsigned int bytes_read
;
1709 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1711 /* Read just enough information to find out where the next
1712 compilation unit is. */
1713 cu_header
.initial_length_size
= 0;
1714 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1715 &cu_header
, &bytes_read
);
1717 /* Save the compilation unit for later lookup. */
1718 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1719 sizeof (struct dwarf2_per_cu_data
));
1720 memset (this_cu
, 0, sizeof (*this_cu
));
1721 this_cu
->offset
= offset
;
1722 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1724 if (n_comp_units
== n_allocated
)
1727 all_comp_units
= xrealloc (all_comp_units
,
1729 * sizeof (struct dwarf2_per_cu_data
*));
1731 all_comp_units
[n_comp_units
++] = this_cu
;
1733 info_ptr
= info_ptr
+ this_cu
->length
;
1736 dwarf2_per_objfile
->all_comp_units
1737 = obstack_alloc (&objfile
->objfile_obstack
,
1738 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1739 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1740 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1741 xfree (all_comp_units
);
1742 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1745 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1746 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1750 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1751 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1753 struct objfile
*objfile
= cu
->objfile
;
1754 bfd
*abfd
= objfile
->obfd
;
1755 struct partial_die_info
*pdi
;
1757 /* Now, march along the PDI's, descending into ones which have
1758 interesting children but skipping the children of the other ones,
1759 until we reach the end of the compilation unit. */
1765 fixup_partial_die (pdi
, cu
);
1767 /* Anonymous namespaces have no name but have interesting
1768 children, so we need to look at them. Ditto for anonymous
1771 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1772 || pdi
->tag
== DW_TAG_enumeration_type
)
1776 case DW_TAG_subprogram
:
1777 if (pdi
->has_pc_info
)
1779 if (pdi
->lowpc
< *lowpc
)
1781 *lowpc
= pdi
->lowpc
;
1783 if (pdi
->highpc
> *highpc
)
1785 *highpc
= pdi
->highpc
;
1787 if (!pdi
->is_declaration
)
1789 add_partial_symbol (pdi
, cu
);
1793 case DW_TAG_variable
:
1794 case DW_TAG_typedef
:
1795 case DW_TAG_union_type
:
1796 if (!pdi
->is_declaration
)
1798 add_partial_symbol (pdi
, cu
);
1801 case DW_TAG_class_type
:
1802 case DW_TAG_interface_type
:
1803 case DW_TAG_structure_type
:
1804 if (!pdi
->is_declaration
)
1806 add_partial_symbol (pdi
, cu
);
1809 case DW_TAG_enumeration_type
:
1810 if (!pdi
->is_declaration
)
1811 add_partial_enumeration (pdi
, cu
);
1813 case DW_TAG_base_type
:
1814 case DW_TAG_subrange_type
:
1815 /* File scope base type definitions are added to the partial
1817 add_partial_symbol (pdi
, cu
);
1819 case DW_TAG_namespace
:
1820 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1827 /* If the die has a sibling, skip to the sibling. */
1829 pdi
= pdi
->die_sibling
;
1833 /* Functions used to compute the fully scoped name of a partial DIE.
1835 Normally, this is simple. For C++, the parent DIE's fully scoped
1836 name is concatenated with "::" and the partial DIE's name. For
1837 Java, the same thing occurs except that "." is used instead of "::".
1838 Enumerators are an exception; they use the scope of their parent
1839 enumeration type, i.e. the name of the enumeration type is not
1840 prepended to the enumerator.
1842 There are two complexities. One is DW_AT_specification; in this
1843 case "parent" means the parent of the target of the specification,
1844 instead of the direct parent of the DIE. The other is compilers
1845 which do not emit DW_TAG_namespace; in this case we try to guess
1846 the fully qualified name of structure types from their members'
1847 linkage names. This must be done using the DIE's children rather
1848 than the children of any DW_AT_specification target. We only need
1849 to do this for structures at the top level, i.e. if the target of
1850 any DW_AT_specification (if any; otherwise the DIE itself) does not
1853 /* Compute the scope prefix associated with PDI's parent, in
1854 compilation unit CU. The result will be allocated on CU's
1855 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1856 field. NULL is returned if no prefix is necessary. */
1858 partial_die_parent_scope (struct partial_die_info
*pdi
,
1859 struct dwarf2_cu
*cu
)
1861 char *grandparent_scope
;
1862 struct partial_die_info
*parent
, *real_pdi
;
1864 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1865 then this means the parent of the specification DIE. */
1868 while (real_pdi
->has_specification
)
1869 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1871 parent
= real_pdi
->die_parent
;
1875 if (parent
->scope_set
)
1876 return parent
->scope
;
1878 fixup_partial_die (parent
, cu
);
1880 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1882 if (parent
->tag
== DW_TAG_namespace
1883 || parent
->tag
== DW_TAG_structure_type
1884 || parent
->tag
== DW_TAG_class_type
1885 || parent
->tag
== DW_TAG_interface_type
1886 || parent
->tag
== DW_TAG_union_type
)
1888 if (grandparent_scope
== NULL
)
1889 parent
->scope
= parent
->name
;
1891 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1894 else if (parent
->tag
== DW_TAG_enumeration_type
)
1895 /* Enumerators should not get the name of the enumeration as a prefix. */
1896 parent
->scope
= grandparent_scope
;
1899 /* FIXME drow/2004-04-01: What should we be doing with
1900 function-local names? For partial symbols, we should probably be
1902 complaint (&symfile_complaints
,
1903 _("unhandled containing DIE tag %d for DIE at %d"),
1904 parent
->tag
, pdi
->offset
);
1905 parent
->scope
= grandparent_scope
;
1908 parent
->scope_set
= 1;
1909 return parent
->scope
;
1912 /* Return the fully scoped name associated with PDI, from compilation unit
1913 CU. The result will be allocated with malloc. */
1915 partial_die_full_name (struct partial_die_info
*pdi
,
1916 struct dwarf2_cu
*cu
)
1920 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1921 if (parent_scope
== NULL
)
1924 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1928 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1930 struct objfile
*objfile
= cu
->objfile
;
1932 char *actual_name
= NULL
;
1933 const char *my_prefix
;
1934 const struct partial_symbol
*psym
= NULL
;
1936 int built_actual_name
= 0;
1938 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1940 if (pdi_needs_namespace (pdi
->tag
))
1942 actual_name
= partial_die_full_name (pdi
, cu
);
1944 built_actual_name
= 1;
1947 if (actual_name
== NULL
)
1948 actual_name
= pdi
->name
;
1952 case DW_TAG_subprogram
:
1953 if (pdi
->is_external
|| cu
->language
== language_ada
)
1955 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
1956 of the global scope. But in Ada, we want to be able to access
1957 nested procedures globally. So all Ada subprograms are stored
1958 in the global scope. */
1959 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1960 mst_text, objfile); */
1961 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1962 VAR_DOMAIN
, LOC_BLOCK
,
1963 &objfile
->global_psymbols
,
1964 0, pdi
->lowpc
+ baseaddr
,
1965 cu
->language
, objfile
);
1969 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1970 mst_file_text, objfile); */
1971 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1972 VAR_DOMAIN
, LOC_BLOCK
,
1973 &objfile
->static_psymbols
,
1974 0, pdi
->lowpc
+ baseaddr
,
1975 cu
->language
, objfile
);
1978 case DW_TAG_variable
:
1979 if (pdi
->is_external
)
1982 Don't enter into the minimal symbol tables as there is
1983 a minimal symbol table entry from the ELF symbols already.
1984 Enter into partial symbol table if it has a location
1985 descriptor or a type.
1986 If the location descriptor is missing, new_symbol will create
1987 a LOC_UNRESOLVED symbol, the address of the variable will then
1988 be determined from the minimal symbol table whenever the variable
1990 The address for the partial symbol table entry is not
1991 used by GDB, but it comes in handy for debugging partial symbol
1995 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1996 if (pdi
->locdesc
|| pdi
->has_type
)
1997 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1998 VAR_DOMAIN
, LOC_STATIC
,
1999 &objfile
->global_psymbols
,
2001 cu
->language
, objfile
);
2005 /* Static Variable. Skip symbols without location descriptors. */
2006 if (pdi
->locdesc
== NULL
)
2008 if (built_actual_name
)
2009 xfree (actual_name
);
2012 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2013 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2014 mst_file_data, objfile); */
2015 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2016 VAR_DOMAIN
, LOC_STATIC
,
2017 &objfile
->static_psymbols
,
2019 cu
->language
, objfile
);
2022 case DW_TAG_typedef
:
2023 case DW_TAG_base_type
:
2024 case DW_TAG_subrange_type
:
2025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2026 VAR_DOMAIN
, LOC_TYPEDEF
,
2027 &objfile
->static_psymbols
,
2028 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2030 case DW_TAG_namespace
:
2031 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2032 VAR_DOMAIN
, LOC_TYPEDEF
,
2033 &objfile
->global_psymbols
,
2034 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2036 case DW_TAG_class_type
:
2037 case DW_TAG_interface_type
:
2038 case DW_TAG_structure_type
:
2039 case DW_TAG_union_type
:
2040 case DW_TAG_enumeration_type
:
2041 /* Skip external references. The DWARF standard says in the section
2042 about "Structure, Union, and Class Type Entries": "An incomplete
2043 structure, union or class type is represented by a structure,
2044 union or class entry that does not have a byte size attribute
2045 and that has a DW_AT_declaration attribute." */
2046 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2048 if (built_actual_name
)
2049 xfree (actual_name
);
2053 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2054 static vs. global. */
2055 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2056 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2057 (cu
->language
== language_cplus
2058 || cu
->language
== language_java
)
2059 ? &objfile
->global_psymbols
2060 : &objfile
->static_psymbols
,
2061 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2064 case DW_TAG_enumerator
:
2065 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2066 VAR_DOMAIN
, LOC_CONST
,
2067 (cu
->language
== language_cplus
2068 || cu
->language
== language_java
)
2069 ? &objfile
->global_psymbols
2070 : &objfile
->static_psymbols
,
2071 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2077 /* Check to see if we should scan the name for possible namespace
2078 info. Only do this if this is C++, if we don't have namespace
2079 debugging info in the file, if the psym is of an appropriate type
2080 (otherwise we'll have psym == NULL), and if we actually had a
2081 mangled name to begin with. */
2083 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2084 cases which do not set PSYM above? */
2086 if (cu
->language
== language_cplus
2087 && cu
->has_namespace_info
== 0
2089 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2090 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2093 if (built_actual_name
)
2094 xfree (actual_name
);
2097 /* Determine whether a die of type TAG living in a C++ class or
2098 namespace needs to have the name of the scope prepended to the
2099 name listed in the die. */
2102 pdi_needs_namespace (enum dwarf_tag tag
)
2106 case DW_TAG_namespace
:
2107 case DW_TAG_typedef
:
2108 case DW_TAG_class_type
:
2109 case DW_TAG_interface_type
:
2110 case DW_TAG_structure_type
:
2111 case DW_TAG_union_type
:
2112 case DW_TAG_enumeration_type
:
2113 case DW_TAG_enumerator
:
2120 /* Read a partial die corresponding to a namespace; also, add a symbol
2121 corresponding to that namespace to the symbol table. NAMESPACE is
2122 the name of the enclosing namespace. */
2125 add_partial_namespace (struct partial_die_info
*pdi
,
2126 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2127 struct dwarf2_cu
*cu
)
2129 struct objfile
*objfile
= cu
->objfile
;
2131 /* Add a symbol for the namespace. */
2133 add_partial_symbol (pdi
, cu
);
2135 /* Now scan partial symbols in that namespace. */
2137 if (pdi
->has_children
)
2138 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2141 /* See if we can figure out if the class lives in a namespace. We do
2142 this by looking for a member function; its demangled name will
2143 contain namespace info, if there is any. */
2146 guess_structure_name (struct partial_die_info
*struct_pdi
,
2147 struct dwarf2_cu
*cu
)
2149 if ((cu
->language
== language_cplus
2150 || cu
->language
== language_java
)
2151 && cu
->has_namespace_info
== 0
2152 && struct_pdi
->has_children
)
2154 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2155 what template types look like, because the demangler
2156 frequently doesn't give the same name as the debug info. We
2157 could fix this by only using the demangled name to get the
2158 prefix (but see comment in read_structure_type). */
2160 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2161 struct partial_die_info
*real_pdi
;
2163 /* If this DIE (this DIE's specification, if any) has a parent, then
2164 we should not do this. We'll prepend the parent's fully qualified
2165 name when we create the partial symbol. */
2167 real_pdi
= struct_pdi
;
2168 while (real_pdi
->has_specification
)
2169 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2171 if (real_pdi
->die_parent
!= NULL
)
2174 while (child_pdi
!= NULL
)
2176 if (child_pdi
->tag
== DW_TAG_subprogram
)
2178 char *actual_class_name
2179 = language_class_name_from_physname (cu
->language_defn
,
2181 if (actual_class_name
!= NULL
)
2184 = obsavestring (actual_class_name
,
2185 strlen (actual_class_name
),
2186 &cu
->comp_unit_obstack
);
2187 xfree (actual_class_name
);
2192 child_pdi
= child_pdi
->die_sibling
;
2197 /* Read a partial die corresponding to an enumeration type. */
2200 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2201 struct dwarf2_cu
*cu
)
2203 struct objfile
*objfile
= cu
->objfile
;
2204 bfd
*abfd
= objfile
->obfd
;
2205 struct partial_die_info
*pdi
;
2207 if (enum_pdi
->name
!= NULL
)
2208 add_partial_symbol (enum_pdi
, cu
);
2210 pdi
= enum_pdi
->die_child
;
2213 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2214 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2216 add_partial_symbol (pdi
, cu
);
2217 pdi
= pdi
->die_sibling
;
2221 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2222 Return the corresponding abbrev, or NULL if the number is zero (indicating
2223 an empty DIE). In either case *BYTES_READ will be set to the length of
2224 the initial number. */
2226 static struct abbrev_info
*
2227 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2228 struct dwarf2_cu
*cu
)
2230 bfd
*abfd
= cu
->objfile
->obfd
;
2231 unsigned int abbrev_number
;
2232 struct abbrev_info
*abbrev
;
2234 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2236 if (abbrev_number
== 0)
2239 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2242 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2243 bfd_get_filename (abfd
));
2249 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2250 pointer to the end of a series of DIEs, terminated by an empty
2251 DIE. Any children of the skipped DIEs will also be skipped. */
2254 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2256 struct abbrev_info
*abbrev
;
2257 unsigned int bytes_read
;
2261 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2263 return info_ptr
+ bytes_read
;
2265 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2269 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2270 should point just after the initial uleb128 of a DIE, and the
2271 abbrev corresponding to that skipped uleb128 should be passed in
2272 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2276 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2277 struct dwarf2_cu
*cu
)
2279 unsigned int bytes_read
;
2280 struct attribute attr
;
2281 bfd
*abfd
= cu
->objfile
->obfd
;
2282 unsigned int form
, i
;
2284 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2286 /* The only abbrev we care about is DW_AT_sibling. */
2287 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2289 read_attribute (&attr
, &abbrev
->attrs
[i
],
2290 abfd
, info_ptr
, cu
);
2291 if (attr
.form
== DW_FORM_ref_addr
)
2292 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2294 return dwarf2_per_objfile
->info_buffer
2295 + dwarf2_get_ref_die_offset (&attr
, cu
);
2298 /* If it isn't DW_AT_sibling, skip this attribute. */
2299 form
= abbrev
->attrs
[i
].form
;
2304 case DW_FORM_ref_addr
:
2305 info_ptr
+= cu
->header
.addr_size
;
2324 case DW_FORM_string
:
2325 read_string (abfd
, info_ptr
, &bytes_read
);
2326 info_ptr
+= bytes_read
;
2329 info_ptr
+= cu
->header
.offset_size
;
2332 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2333 info_ptr
+= bytes_read
;
2335 case DW_FORM_block1
:
2336 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2338 case DW_FORM_block2
:
2339 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2341 case DW_FORM_block4
:
2342 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2346 case DW_FORM_ref_udata
:
2347 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2349 case DW_FORM_indirect
:
2350 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2351 info_ptr
+= bytes_read
;
2352 /* We need to continue parsing from here, so just go back to
2354 goto skip_attribute
;
2357 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2358 dwarf_form_name (form
),
2359 bfd_get_filename (abfd
));
2363 if (abbrev
->has_children
)
2364 return skip_children (info_ptr
, cu
);
2369 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2370 the next DIE after ORIG_PDI. */
2373 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2374 bfd
*abfd
, struct dwarf2_cu
*cu
)
2376 /* Do we know the sibling already? */
2378 if (orig_pdi
->sibling
)
2379 return orig_pdi
->sibling
;
2381 /* Are there any children to deal with? */
2383 if (!orig_pdi
->has_children
)
2386 /* Skip the children the long way. */
2388 return skip_children (info_ptr
, cu
);
2391 /* Expand this partial symbol table into a full symbol table. */
2394 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2396 /* FIXME: This is barely more than a stub. */
2401 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2407 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2408 gdb_flush (gdb_stdout
);
2411 /* Restore our global data. */
2412 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2413 dwarf2_objfile_data_key
);
2415 psymtab_to_symtab_1 (pst
);
2417 /* Finish up the debug error message. */
2419 printf_filtered (_("done.\n"));
2424 /* Add PER_CU to the queue. */
2427 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2429 struct dwarf2_queue_item
*item
;
2432 item
= xmalloc (sizeof (*item
));
2433 item
->per_cu
= per_cu
;
2436 if (dwarf2_queue
== NULL
)
2437 dwarf2_queue
= item
;
2439 dwarf2_queue_tail
->next
= item
;
2441 dwarf2_queue_tail
= item
;
2444 /* Process the queue. */
2447 process_queue (struct objfile
*objfile
)
2449 struct dwarf2_queue_item
*item
, *next_item
;
2451 /* Initially, there is just one item on the queue. Load its DIEs,
2452 and the DIEs of any other compilation units it requires,
2455 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2457 /* Read in this compilation unit. This may add new items to
2458 the end of the queue. */
2459 load_full_comp_unit (item
->per_cu
, objfile
);
2461 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2462 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2465 /* Now everything left on the queue needs to be read in. Process
2466 them, one at a time, removing from the queue as we finish. */
2467 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2469 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2470 process_full_comp_unit (item
->per_cu
);
2472 item
->per_cu
->queued
= 0;
2473 next_item
= item
->next
;
2477 dwarf2_queue_tail
= NULL
;
2480 /* Free all allocated queue entries. This function only releases anything if
2481 an error was thrown; if the queue was processed then it would have been
2482 freed as we went along. */
2485 dwarf2_release_queue (void *dummy
)
2487 struct dwarf2_queue_item
*item
, *last
;
2489 item
= dwarf2_queue
;
2492 /* Anything still marked queued is likely to be in an
2493 inconsistent state, so discard it. */
2494 if (item
->per_cu
->queued
)
2496 if (item
->per_cu
->cu
!= NULL
)
2497 free_one_cached_comp_unit (item
->per_cu
->cu
);
2498 item
->per_cu
->queued
= 0;
2506 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2509 /* Read in full symbols for PST, and anything it depends on. */
2512 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2514 struct dwarf2_per_cu_data
*per_cu
;
2515 struct cleanup
*back_to
;
2518 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2519 if (!pst
->dependencies
[i
]->readin
)
2521 /* Inform about additional files that need to be read in. */
2524 /* FIXME: i18n: Need to make this a single string. */
2525 fputs_filtered (" ", gdb_stdout
);
2527 fputs_filtered ("and ", gdb_stdout
);
2529 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2530 wrap_here (""); /* Flush output */
2531 gdb_flush (gdb_stdout
);
2533 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2536 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2540 /* It's an include file, no symbols to read for it.
2541 Everything is in the parent symtab. */
2546 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2548 queue_comp_unit (per_cu
);
2550 process_queue (pst
->objfile
);
2552 /* Age the cache, releasing compilation units that have not
2553 been used recently. */
2554 age_cached_comp_units ();
2556 do_cleanups (back_to
);
2559 /* Load the DIEs associated with PST and PER_CU into memory. */
2561 static struct dwarf2_cu
*
2562 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2564 bfd
*abfd
= objfile
->obfd
;
2565 struct dwarf2_cu
*cu
;
2566 unsigned long offset
;
2568 struct cleanup
*back_to
, *free_cu_cleanup
;
2569 struct attribute
*attr
;
2572 /* Set local variables from the partial symbol table info. */
2573 offset
= per_cu
->offset
;
2575 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2577 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2578 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2580 /* If an error occurs while loading, release our storage. */
2581 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2583 cu
->objfile
= objfile
;
2585 /* read in the comp_unit header */
2586 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2588 /* Read the abbrevs for this compilation unit */
2589 dwarf2_read_abbrevs (abfd
, cu
);
2590 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2592 cu
->header
.offset
= offset
;
2594 cu
->per_cu
= per_cu
;
2596 cu
->type_hash
= per_cu
->type_hash
;
2598 /* We use this obstack for block values in dwarf_alloc_block. */
2599 obstack_init (&cu
->comp_unit_obstack
);
2601 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2603 /* We try not to read any attributes in this function, because not
2604 all objfiles needed for references have been loaded yet, and symbol
2605 table processing isn't initialized. But we have to set the CU language,
2606 or we won't be able to build types correctly. */
2607 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2609 set_cu_language (DW_UNSND (attr
), cu
);
2611 set_cu_language (language_minimal
, cu
);
2613 do_cleanups (back_to
);
2615 /* We've successfully allocated this compilation unit. Let our caller
2616 clean it up when finished with it. */
2617 discard_cleanups (free_cu_cleanup
);
2622 /* Generate full symbol information for PST and CU, whose DIEs have
2623 already been loaded into memory. */
2626 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2628 struct partial_symtab
*pst
= per_cu
->psymtab
;
2629 struct dwarf2_cu
*cu
= per_cu
->cu
;
2630 struct objfile
*objfile
= pst
->objfile
;
2631 bfd
*abfd
= objfile
->obfd
;
2632 CORE_ADDR lowpc
, highpc
;
2633 struct symtab
*symtab
;
2634 struct cleanup
*back_to
;
2635 struct attribute
*attr
;
2638 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2640 /* We're in the global namespace. */
2641 processing_current_prefix
= "";
2644 back_to
= make_cleanup (really_free_pendings
, NULL
);
2646 cu
->list_in_scope
= &file_symbols
;
2648 /* Find the base address of the compilation unit for range lists and
2649 location lists. It will normally be specified by DW_AT_low_pc.
2650 In DWARF-3 draft 4, the base address could be overridden by
2651 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2652 compilation units with discontinuous ranges. */
2654 cu
->header
.base_known
= 0;
2655 cu
->header
.base_address
= 0;
2657 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2660 cu
->header
.base_address
= DW_ADDR (attr
);
2661 cu
->header
.base_known
= 1;
2665 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2668 cu
->header
.base_address
= DW_ADDR (attr
);
2669 cu
->header
.base_known
= 1;
2673 /* Do line number decoding in read_file_scope () */
2674 process_die (cu
->dies
, cu
);
2676 /* Some compilers don't define a DW_AT_high_pc attribute for the
2677 compilation unit. If the DW_AT_high_pc is missing, synthesize
2678 it, by scanning the DIE's below the compilation unit. */
2679 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2681 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2683 /* Set symtab language to language from DW_AT_language.
2684 If the compilation is from a C file generated by language preprocessors,
2685 do not set the language if it was already deduced by start_subfile. */
2687 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2689 symtab
->language
= cu
->language
;
2691 pst
->symtab
= symtab
;
2694 do_cleanups (back_to
);
2697 /* Process a die and its children. */
2700 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2704 case DW_TAG_padding
:
2706 case DW_TAG_compile_unit
:
2707 read_file_scope (die
, cu
);
2709 case DW_TAG_subprogram
:
2710 read_func_scope (die
, cu
);
2712 case DW_TAG_inlined_subroutine
:
2713 /* FIXME: These are ignored for now.
2714 They could be used to set breakpoints on all inlined instances
2715 of a function and make GDB `next' properly over inlined functions. */
2717 case DW_TAG_lexical_block
:
2718 case DW_TAG_try_block
:
2719 case DW_TAG_catch_block
:
2720 read_lexical_block_scope (die
, cu
);
2722 case DW_TAG_class_type
:
2723 case DW_TAG_interface_type
:
2724 case DW_TAG_structure_type
:
2725 case DW_TAG_union_type
:
2726 process_structure_scope (die
, cu
);
2728 case DW_TAG_enumeration_type
:
2729 process_enumeration_scope (die
, cu
);
2732 /* These dies have a type, but processing them does not create
2733 a symbol or recurse to process the children. Therefore we can
2734 read them on-demand through read_type_die. */
2735 case DW_TAG_subroutine_type
:
2736 case DW_TAG_set_type
:
2737 case DW_TAG_array_type
:
2738 case DW_TAG_pointer_type
:
2739 case DW_TAG_ptr_to_member_type
:
2740 case DW_TAG_reference_type
:
2741 case DW_TAG_string_type
:
2744 case DW_TAG_base_type
:
2745 case DW_TAG_subrange_type
:
2746 /* Add a typedef symbol for the type definition, if it has a
2748 new_symbol (die
, read_type_die (die
, cu
), cu
);
2750 case DW_TAG_common_block
:
2751 read_common_block (die
, cu
);
2753 case DW_TAG_common_inclusion
:
2755 case DW_TAG_namespace
:
2756 processing_has_namespace_info
= 1;
2757 read_namespace (die
, cu
);
2759 case DW_TAG_imported_declaration
:
2760 case DW_TAG_imported_module
:
2761 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2762 information contained in these. DW_TAG_imported_declaration
2763 dies shouldn't have children; DW_TAG_imported_module dies
2764 shouldn't in the C++ case, but conceivably could in the
2765 Fortran case, so we'll have to replace this gdb_assert if
2766 Fortran compilers start generating that info. */
2767 processing_has_namespace_info
= 1;
2768 gdb_assert (die
->child
== NULL
);
2771 new_symbol (die
, NULL
, cu
);
2777 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2779 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2783 free_cu_line_header (void *arg
)
2785 struct dwarf2_cu
*cu
= arg
;
2787 free_line_header (cu
->line_header
);
2788 cu
->line_header
= NULL
;
2792 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2794 struct objfile
*objfile
= cu
->objfile
;
2795 struct comp_unit_head
*cu_header
= &cu
->header
;
2796 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2797 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2798 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2799 struct attribute
*attr
;
2801 char *comp_dir
= NULL
;
2802 struct die_info
*child_die
;
2803 bfd
*abfd
= objfile
->obfd
;
2804 struct line_header
*line_header
= 0;
2807 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2809 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2811 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2812 from finish_block. */
2813 if (lowpc
== ((CORE_ADDR
) -1))
2818 /* Find the filename. Do not use dwarf2_name here, since the filename
2819 is not a source language identifier. */
2820 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2823 name
= DW_STRING (attr
);
2826 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2828 comp_dir
= DW_STRING (attr
);
2829 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2831 comp_dir
= ldirname (name
);
2832 if (comp_dir
!= NULL
)
2833 make_cleanup (xfree
, comp_dir
);
2835 if (comp_dir
!= NULL
)
2837 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2838 directory, get rid of it. */
2839 char *cp
= strchr (comp_dir
, ':');
2841 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2848 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2851 set_cu_language (DW_UNSND (attr
), cu
);
2854 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2856 cu
->producer
= DW_STRING (attr
);
2858 /* We assume that we're processing GCC output. */
2859 processing_gcc_compilation
= 2;
2861 start_symtab (name
, comp_dir
, lowpc
);
2862 record_debugformat ("DWARF 2");
2863 record_producer (cu
->producer
);
2865 initialize_cu_func_list (cu
);
2867 /* Decode line number information if present. We do this before
2868 processing child DIEs, so that the line header table is available
2869 for DW_AT_decl_file. */
2870 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2873 unsigned int line_offset
= DW_UNSND (attr
);
2874 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2877 cu
->line_header
= line_header
;
2878 make_cleanup (free_cu_line_header
, cu
);
2879 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2883 /* Process all dies in compilation unit. */
2884 if (die
->child
!= NULL
)
2886 child_die
= die
->child
;
2887 while (child_die
&& child_die
->tag
)
2889 process_die (child_die
, cu
);
2890 child_die
= sibling_die (child_die
);
2894 /* Decode macro information, if present. Dwarf 2 macro information
2895 refers to information in the line number info statement program
2896 header, so we can only read it if we've read the header
2898 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2899 if (attr
&& line_header
)
2901 unsigned int macro_offset
= DW_UNSND (attr
);
2902 dwarf_decode_macros (line_header
, macro_offset
,
2903 comp_dir
, abfd
, cu
);
2905 do_cleanups (back_to
);
2909 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2910 struct dwarf2_cu
*cu
)
2912 struct function_range
*thisfn
;
2914 thisfn
= (struct function_range
*)
2915 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2916 thisfn
->name
= name
;
2917 thisfn
->lowpc
= lowpc
;
2918 thisfn
->highpc
= highpc
;
2919 thisfn
->seen_line
= 0;
2920 thisfn
->next
= NULL
;
2922 if (cu
->last_fn
== NULL
)
2923 cu
->first_fn
= thisfn
;
2925 cu
->last_fn
->next
= thisfn
;
2927 cu
->last_fn
= thisfn
;
2931 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2933 struct objfile
*objfile
= cu
->objfile
;
2934 struct context_stack
*new;
2937 struct die_info
*child_die
;
2938 struct attribute
*attr
;
2940 const char *previous_prefix
= processing_current_prefix
;
2941 struct cleanup
*back_to
= NULL
;
2943 struct block
*block
;
2945 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2947 name
= dwarf2_linkage_name (die
, cu
);
2949 /* Ignore functions with missing or empty names and functions with
2950 missing or invalid low and high pc attributes. */
2951 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2954 if (cu
->language
== language_cplus
2955 || cu
->language
== language_java
)
2957 struct die_info
*spec_die
= die_specification (die
, cu
);
2959 /* NOTE: carlton/2004-01-23: We have to be careful in the
2960 presence of DW_AT_specification. For example, with GCC 3.4,
2965 // Definition of N::foo.
2969 then we'll have a tree of DIEs like this:
2971 1: DW_TAG_compile_unit
2972 2: DW_TAG_namespace // N
2973 3: DW_TAG_subprogram // declaration of N::foo
2974 4: DW_TAG_subprogram // definition of N::foo
2975 DW_AT_specification // refers to die #3
2977 Thus, when processing die #4, we have to pretend that we're
2978 in the context of its DW_AT_specification, namely the contex
2981 if (spec_die
!= NULL
)
2983 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2984 processing_current_prefix
= specification_prefix
;
2985 back_to
= make_cleanup (xfree
, specification_prefix
);
2992 /* Record the function range for dwarf_decode_lines. */
2993 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2995 new = push_context (0, lowpc
);
2996 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
2998 /* If there is a location expression for DW_AT_frame_base, record
3000 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3002 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3003 expression is being recorded directly in the function's symbol
3004 and not in a separate frame-base object. I guess this hack is
3005 to avoid adding some sort of frame-base adjunct/annex to the
3006 function's symbol :-(. The problem with doing this is that it
3007 results in a function symbol with a location expression that
3008 has nothing to do with the location of the function, ouch! The
3009 relationship should be: a function's symbol has-a frame base; a
3010 frame-base has-a location expression. */
3011 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3013 cu
->list_in_scope
= &local_symbols
;
3015 if (die
->child
!= NULL
)
3017 child_die
= die
->child
;
3018 while (child_die
&& child_die
->tag
)
3020 process_die (child_die
, cu
);
3021 child_die
= sibling_die (child_die
);
3025 new = pop_context ();
3026 /* Make a block for the local symbols within. */
3027 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3028 lowpc
, highpc
, objfile
);
3030 /* If we have address ranges, record them. */
3031 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3033 /* In C++, we can have functions nested inside functions (e.g., when
3034 a function declares a class that has methods). This means that
3035 when we finish processing a function scope, we may need to go
3036 back to building a containing block's symbol lists. */
3037 local_symbols
= new->locals
;
3038 param_symbols
= new->params
;
3040 /* If we've finished processing a top-level function, subsequent
3041 symbols go in the file symbol list. */
3042 if (outermost_context_p ())
3043 cu
->list_in_scope
= &file_symbols
;
3045 processing_current_prefix
= previous_prefix
;
3046 if (back_to
!= NULL
)
3047 do_cleanups (back_to
);
3050 /* Process all the DIES contained within a lexical block scope. Start
3051 a new scope, process the dies, and then close the scope. */
3054 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3056 struct objfile
*objfile
= cu
->objfile
;
3057 struct context_stack
*new;
3058 CORE_ADDR lowpc
, highpc
;
3059 struct die_info
*child_die
;
3062 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3064 /* Ignore blocks with missing or invalid low and high pc attributes. */
3065 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3066 as multiple lexical blocks? Handling children in a sane way would
3067 be nasty. Might be easier to properly extend generic blocks to
3069 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3074 push_context (0, lowpc
);
3075 if (die
->child
!= NULL
)
3077 child_die
= die
->child
;
3078 while (child_die
&& child_die
->tag
)
3080 process_die (child_die
, cu
);
3081 child_die
= sibling_die (child_die
);
3084 new = pop_context ();
3086 if (local_symbols
!= NULL
)
3089 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3092 /* Note that recording ranges after traversing children, as we
3093 do here, means that recording a parent's ranges entails
3094 walking across all its children's ranges as they appear in
3095 the address map, which is quadratic behavior.
3097 It would be nicer to record the parent's ranges before
3098 traversing its children, simply overriding whatever you find
3099 there. But since we don't even decide whether to create a
3100 block until after we've traversed its children, that's hard
3102 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3104 local_symbols
= new->locals
;
3107 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3108 Return 1 if the attributes are present and valid, otherwise, return 0.
3109 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3112 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3113 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3114 struct partial_symtab
*ranges_pst
)
3116 struct objfile
*objfile
= cu
->objfile
;
3117 struct comp_unit_head
*cu_header
= &cu
->header
;
3118 bfd
*obfd
= objfile
->obfd
;
3119 unsigned int addr_size
= cu_header
->addr_size
;
3120 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3121 /* Base address selection entry. */
3132 found_base
= cu_header
->base_known
;
3133 base
= cu_header
->base_address
;
3135 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3137 complaint (&symfile_complaints
,
3138 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3142 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3144 /* Read in the largest possible address. */
3145 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3146 if ((marker
& mask
) == mask
)
3148 /* If we found the largest possible address, then
3149 read the base address. */
3150 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3151 buffer
+= 2 * addr_size
;
3152 offset
+= 2 * addr_size
;
3158 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3162 CORE_ADDR range_beginning
, range_end
;
3164 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3165 buffer
+= addr_size
;
3166 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3167 buffer
+= addr_size
;
3168 offset
+= 2 * addr_size
;
3170 /* An end of list marker is a pair of zero addresses. */
3171 if (range_beginning
== 0 && range_end
== 0)
3172 /* Found the end of list entry. */
3175 /* Each base address selection entry is a pair of 2 values.
3176 The first is the largest possible address, the second is
3177 the base address. Check for a base address here. */
3178 if ((range_beginning
& mask
) == mask
)
3180 /* If we found the largest possible address, then
3181 read the base address. */
3182 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3189 /* We have no valid base address for the ranges
3191 complaint (&symfile_complaints
,
3192 _("Invalid .debug_ranges data (no base address)"));
3196 range_beginning
+= base
;
3199 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
3200 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3201 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
3204 /* FIXME: This is recording everything as a low-high
3205 segment of consecutive addresses. We should have a
3206 data structure for discontiguous block ranges
3210 low
= range_beginning
;
3216 if (range_beginning
< low
)
3217 low
= range_beginning
;
3218 if (range_end
> high
)
3224 /* If the first entry is an end-of-list marker, the range
3225 describes an empty scope, i.e. no instructions. */
3231 *high_return
= high
;
3235 /* Get low and high pc attributes from a die. Return 1 if the attributes
3236 are present and valid, otherwise, return 0. Return -1 if the range is
3237 discontinuous, i.e. derived from DW_AT_ranges information. */
3239 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3240 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3242 struct attribute
*attr
;
3247 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3250 high
= DW_ADDR (attr
);
3251 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3253 low
= DW_ADDR (attr
);
3255 /* Found high w/o low attribute. */
3258 /* Found consecutive range of addresses. */
3263 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3266 /* Value of the DW_AT_ranges attribute is the offset in the
3267 .debug_ranges section. */
3268 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, NULL
))
3270 /* Found discontinuous range of addresses. */
3278 /* When using the GNU linker, .gnu.linkonce. sections are used to
3279 eliminate duplicate copies of functions and vtables and such.
3280 The linker will arbitrarily choose one and discard the others.
3281 The AT_*_pc values for such functions refer to local labels in
3282 these sections. If the section from that file was discarded, the
3283 labels are not in the output, so the relocs get a value of 0.
3284 If this is a discarded function, mark the pc bounds as invalid,
3285 so that GDB will ignore it. */
3286 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3294 /* Get the low and high pc's represented by the scope DIE, and store
3295 them in *LOWPC and *HIGHPC. If the correct values can't be
3296 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3299 get_scope_pc_bounds (struct die_info
*die
,
3300 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3301 struct dwarf2_cu
*cu
)
3303 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3304 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3305 CORE_ADDR current_low
, current_high
;
3307 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3309 best_low
= current_low
;
3310 best_high
= current_high
;
3314 struct die_info
*child
= die
->child
;
3316 while (child
&& child
->tag
)
3318 switch (child
->tag
) {
3319 case DW_TAG_subprogram
:
3320 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3322 best_low
= min (best_low
, current_low
);
3323 best_high
= max (best_high
, current_high
);
3326 case DW_TAG_namespace
:
3327 /* FIXME: carlton/2004-01-16: Should we do this for
3328 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3329 that current GCC's always emit the DIEs corresponding
3330 to definitions of methods of classes as children of a
3331 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3332 the DIEs giving the declarations, which could be
3333 anywhere). But I don't see any reason why the
3334 standards says that they have to be there. */
3335 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3337 if (current_low
!= ((CORE_ADDR
) -1))
3339 best_low
= min (best_low
, current_low
);
3340 best_high
= max (best_high
, current_high
);
3348 child
= sibling_die (child
);
3353 *highpc
= best_high
;
3356 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3359 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
3360 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
3362 struct attribute
*attr
;
3364 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3367 CORE_ADDR high
= DW_ADDR (attr
);
3368 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3371 CORE_ADDR low
= DW_ADDR (attr
);
3372 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
3376 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3379 bfd
*obfd
= cu
->objfile
->obfd
;
3381 /* The value of the DW_AT_ranges attribute is the offset of the
3382 address range list in the .debug_ranges section. */
3383 unsigned long offset
= DW_UNSND (attr
);
3384 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3386 /* For some target architectures, but not others, the
3387 read_address function sign-extends the addresses it returns.
3388 To recognize base address selection entries, we need a
3390 unsigned int addr_size
= cu
->header
.addr_size
;
3391 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3393 /* The base address, to which the next pair is relative. Note
3394 that this 'base' is a DWARF concept: most entries in a range
3395 list are relative, to reduce the number of relocs against the
3396 debugging information. This is separate from this function's
3397 'baseaddr' argument, which GDB uses to relocate debugging
3398 information from a shared library based on the address at
3399 which the library was loaded. */
3400 CORE_ADDR base
= cu
->header
.base_address
;
3401 int base_known
= cu
->header
.base_known
;
3403 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3405 complaint (&symfile_complaints
,
3406 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3413 unsigned int bytes_read
;
3414 CORE_ADDR start
, end
;
3416 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3417 buffer
+= bytes_read
;
3418 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3419 buffer
+= bytes_read
;
3421 /* Did we find the end of the range list? */
3422 if (start
== 0 && end
== 0)
3425 /* Did we find a base address selection entry? */
3426 else if ((start
& base_select_mask
) == base_select_mask
)
3432 /* We found an ordinary address range. */
3437 complaint (&symfile_complaints
,
3438 _("Invalid .debug_ranges data (no base address)"));
3442 record_block_range (block
,
3443 baseaddr
+ base
+ start
,
3444 baseaddr
+ base
+ end
- 1);
3450 /* Add an aggregate field to the field list. */
3453 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3454 struct dwarf2_cu
*cu
)
3456 struct objfile
*objfile
= cu
->objfile
;
3457 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3458 struct nextfield
*new_field
;
3459 struct attribute
*attr
;
3461 char *fieldname
= "";
3463 /* Allocate a new field list entry and link it in. */
3464 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3465 make_cleanup (xfree
, new_field
);
3466 memset (new_field
, 0, sizeof (struct nextfield
));
3467 new_field
->next
= fip
->fields
;
3468 fip
->fields
= new_field
;
3471 /* Handle accessibility and virtuality of field.
3472 The default accessibility for members is public, the default
3473 accessibility for inheritance is private. */
3474 if (die
->tag
!= DW_TAG_inheritance
)
3475 new_field
->accessibility
= DW_ACCESS_public
;
3477 new_field
->accessibility
= DW_ACCESS_private
;
3478 new_field
->virtuality
= DW_VIRTUALITY_none
;
3480 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3482 new_field
->accessibility
= DW_UNSND (attr
);
3483 if (new_field
->accessibility
!= DW_ACCESS_public
)
3484 fip
->non_public_fields
= 1;
3485 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3487 new_field
->virtuality
= DW_UNSND (attr
);
3489 fp
= &new_field
->field
;
3491 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3493 /* Data member other than a C++ static data member. */
3495 /* Get type of field. */
3496 fp
->type
= die_type (die
, cu
);
3498 FIELD_STATIC_KIND (*fp
) = 0;
3500 /* Get bit size of field (zero if none). */
3501 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3504 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3508 FIELD_BITSIZE (*fp
) = 0;
3511 /* Get bit offset of field. */
3512 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3517 if (attr_form_is_section_offset (attr
))
3519 dwarf2_complex_location_expr_complaint ();
3522 else if (attr_form_is_constant (attr
))
3523 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
3525 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
3527 FIELD_BITPOS (*fp
) = byte_offset
* bits_per_byte
;
3530 FIELD_BITPOS (*fp
) = 0;
3531 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3534 if (gdbarch_bits_big_endian (gdbarch
))
3536 /* For big endian bits, the DW_AT_bit_offset gives the
3537 additional bit offset from the MSB of the containing
3538 anonymous object to the MSB of the field. We don't
3539 have to do anything special since we don't need to
3540 know the size of the anonymous object. */
3541 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3545 /* For little endian bits, compute the bit offset to the
3546 MSB of the anonymous object, subtract off the number of
3547 bits from the MSB of the field to the MSB of the
3548 object, and then subtract off the number of bits of
3549 the field itself. The result is the bit offset of
3550 the LSB of the field. */
3552 int bit_offset
= DW_UNSND (attr
);
3554 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3557 /* The size of the anonymous object containing
3558 the bit field is explicit, so use the
3559 indicated size (in bytes). */
3560 anonymous_size
= DW_UNSND (attr
);
3564 /* The size of the anonymous object containing
3565 the bit field must be inferred from the type
3566 attribute of the data member containing the
3568 anonymous_size
= TYPE_LENGTH (fp
->type
);
3570 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3571 - bit_offset
- FIELD_BITSIZE (*fp
);
3575 /* Get name of field. */
3576 fieldname
= dwarf2_name (die
, cu
);
3577 if (fieldname
== NULL
)
3580 /* The name is already allocated along with this objfile, so we don't
3581 need to duplicate it for the type. */
3582 fp
->name
= fieldname
;
3584 /* Change accessibility for artificial fields (e.g. virtual table
3585 pointer or virtual base class pointer) to private. */
3586 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3588 new_field
->accessibility
= DW_ACCESS_private
;
3589 fip
->non_public_fields
= 1;
3592 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3594 /* C++ static member. */
3596 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3597 is a declaration, but all versions of G++ as of this writing
3598 (so through at least 3.2.1) incorrectly generate
3599 DW_TAG_variable tags. */
3603 /* Get name of field. */
3604 fieldname
= dwarf2_name (die
, cu
);
3605 if (fieldname
== NULL
)
3608 /* Get physical name. */
3609 physname
= dwarf2_linkage_name (die
, cu
);
3611 /* The name is already allocated along with this objfile, so we don't
3612 need to duplicate it for the type. */
3613 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3614 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3615 FIELD_NAME (*fp
) = fieldname
;
3617 else if (die
->tag
== DW_TAG_inheritance
)
3619 /* C++ base class field. */
3620 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3622 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3624 FIELD_BITSIZE (*fp
) = 0;
3625 FIELD_STATIC_KIND (*fp
) = 0;
3626 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3627 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3628 fip
->nbaseclasses
++;
3632 /* Create the vector of fields, and attach it to the type. */
3635 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3636 struct dwarf2_cu
*cu
)
3638 int nfields
= fip
->nfields
;
3640 /* Record the field count, allocate space for the array of fields,
3641 and create blank accessibility bitfields if necessary. */
3642 TYPE_NFIELDS (type
) = nfields
;
3643 TYPE_FIELDS (type
) = (struct field
*)
3644 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3645 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3647 if (fip
->non_public_fields
)
3649 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3651 TYPE_FIELD_PRIVATE_BITS (type
) =
3652 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3653 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3655 TYPE_FIELD_PROTECTED_BITS (type
) =
3656 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3657 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3659 TYPE_FIELD_IGNORE_BITS (type
) =
3660 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3661 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3664 /* If the type has baseclasses, allocate and clear a bit vector for
3665 TYPE_FIELD_VIRTUAL_BITS. */
3666 if (fip
->nbaseclasses
)
3668 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3669 unsigned char *pointer
;
3671 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3672 pointer
= TYPE_ALLOC (type
, num_bytes
);
3673 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3674 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3675 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3678 /* Copy the saved-up fields into the field vector. Start from the head
3679 of the list, adding to the tail of the field array, so that they end
3680 up in the same order in the array in which they were added to the list. */
3681 while (nfields
-- > 0)
3683 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3684 switch (fip
->fields
->accessibility
)
3686 case DW_ACCESS_private
:
3687 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3690 case DW_ACCESS_protected
:
3691 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3694 case DW_ACCESS_public
:
3698 /* Unknown accessibility. Complain and treat it as public. */
3700 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3701 fip
->fields
->accessibility
);
3705 if (nfields
< fip
->nbaseclasses
)
3707 switch (fip
->fields
->virtuality
)
3709 case DW_VIRTUALITY_virtual
:
3710 case DW_VIRTUALITY_pure_virtual
:
3711 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3715 fip
->fields
= fip
->fields
->next
;
3719 /* Add a member function to the proper fieldlist. */
3722 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3723 struct type
*type
, struct dwarf2_cu
*cu
)
3725 struct objfile
*objfile
= cu
->objfile
;
3726 struct attribute
*attr
;
3727 struct fnfieldlist
*flp
;
3729 struct fn_field
*fnp
;
3732 struct nextfnfield
*new_fnfield
;
3733 struct type
*this_type
;
3735 /* Get name of member function. */
3736 fieldname
= dwarf2_name (die
, cu
);
3737 if (fieldname
== NULL
)
3740 /* Get the mangled name. */
3741 physname
= dwarf2_linkage_name (die
, cu
);
3743 /* Look up member function name in fieldlist. */
3744 for (i
= 0; i
< fip
->nfnfields
; i
++)
3746 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3750 /* Create new list element if necessary. */
3751 if (i
< fip
->nfnfields
)
3752 flp
= &fip
->fnfieldlists
[i
];
3755 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3757 fip
->fnfieldlists
= (struct fnfieldlist
*)
3758 xrealloc (fip
->fnfieldlists
,
3759 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3760 * sizeof (struct fnfieldlist
));
3761 if (fip
->nfnfields
== 0)
3762 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3764 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3765 flp
->name
= fieldname
;
3771 /* Create a new member function field and chain it to the field list
3773 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3774 make_cleanup (xfree
, new_fnfield
);
3775 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3776 new_fnfield
->next
= flp
->head
;
3777 flp
->head
= new_fnfield
;
3780 /* Fill in the member function field info. */
3781 fnp
= &new_fnfield
->fnfield
;
3782 /* The name is already allocated along with this objfile, so we don't
3783 need to duplicate it for the type. */
3784 fnp
->physname
= physname
? physname
: "";
3785 fnp
->type
= alloc_type (objfile
);
3786 this_type
= read_type_die (die
, cu
);
3787 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
3789 int nparams
= TYPE_NFIELDS (this_type
);
3791 /* TYPE is the domain of this method, and THIS_TYPE is the type
3792 of the method itself (TYPE_CODE_METHOD). */
3793 smash_to_method_type (fnp
->type
, type
,
3794 TYPE_TARGET_TYPE (this_type
),
3795 TYPE_FIELDS (this_type
),
3796 TYPE_NFIELDS (this_type
),
3797 TYPE_VARARGS (this_type
));
3799 /* Handle static member functions.
3800 Dwarf2 has no clean way to discern C++ static and non-static
3801 member functions. G++ helps GDB by marking the first
3802 parameter for non-static member functions (which is the
3803 this pointer) as artificial. We obtain this information
3804 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3805 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
3806 fnp
->voffset
= VOFFSET_STATIC
;
3809 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3812 /* Get fcontext from DW_AT_containing_type if present. */
3813 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3814 fnp
->fcontext
= die_containing_type (die
, cu
);
3816 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3817 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3819 /* Get accessibility. */
3820 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3823 switch (DW_UNSND (attr
))
3825 case DW_ACCESS_private
:
3826 fnp
->is_private
= 1;
3828 case DW_ACCESS_protected
:
3829 fnp
->is_protected
= 1;
3834 /* Check for artificial methods. */
3835 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3836 if (attr
&& DW_UNSND (attr
) != 0)
3837 fnp
->is_artificial
= 1;
3839 /* Get index in virtual function table if it is a virtual member function. */
3840 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3843 /* Support the .debug_loc offsets */
3844 if (attr_form_is_block (attr
))
3846 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3848 else if (attr_form_is_section_offset (attr
))
3850 dwarf2_complex_location_expr_complaint ();
3854 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3860 /* Create the vector of member function fields, and attach it to the type. */
3863 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3864 struct dwarf2_cu
*cu
)
3866 struct fnfieldlist
*flp
;
3867 int total_length
= 0;
3870 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3871 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3872 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3874 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3876 struct nextfnfield
*nfp
= flp
->head
;
3877 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3880 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3881 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3882 fn_flp
->fn_fields
= (struct fn_field
*)
3883 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3884 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3885 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3887 total_length
+= flp
->length
;
3890 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3891 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3894 /* Returns non-zero if NAME is the name of a vtable member in CU's
3895 language, zero otherwise. */
3897 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3899 static const char vptr
[] = "_vptr";
3900 static const char vtable
[] = "vtable";
3902 /* Look for the C++ and Java forms of the vtable. */
3903 if ((cu
->language
== language_java
3904 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3905 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3906 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3912 /* GCC outputs unnamed structures that are really pointers to member
3913 functions, with the ABI-specified layout. If DIE (from CU) describes
3914 such a structure, set its type, and return nonzero. Otherwise return
3917 GCC shouldn't do this; it should just output pointer to member DIEs.
3918 This is GCC PR debug/28767. */
3920 static struct type
*
3921 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3923 struct objfile
*objfile
= cu
->objfile
;
3925 struct die_info
*pfn_die
, *delta_die
;
3926 struct attribute
*pfn_name
, *delta_name
;
3927 struct type
*pfn_type
, *domain_type
;
3929 /* Check for a structure with no name and two children. */
3930 if (die
->tag
!= DW_TAG_structure_type
3931 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3932 || die
->child
== NULL
3933 || die
->child
->sibling
== NULL
3934 || (die
->child
->sibling
->sibling
!= NULL
3935 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3938 /* Check for __pfn and __delta members. */
3939 pfn_die
= die
->child
;
3940 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3941 if (pfn_die
->tag
!= DW_TAG_member
3943 || DW_STRING (pfn_name
) == NULL
3944 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3947 delta_die
= pfn_die
->sibling
;
3948 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3949 if (delta_die
->tag
!= DW_TAG_member
3950 || delta_name
== NULL
3951 || DW_STRING (delta_name
) == NULL
3952 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3955 /* Find the type of the method. */
3956 pfn_type
= die_type (pfn_die
, cu
);
3957 if (pfn_type
== NULL
3958 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3959 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3962 /* Look for the "this" argument. */
3963 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3964 if (TYPE_NFIELDS (pfn_type
) == 0
3965 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3968 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3969 type
= alloc_type (objfile
);
3970 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3971 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3972 TYPE_VARARGS (pfn_type
));
3973 type
= lookup_methodptr_type (type
);
3974 return set_die_type (die
, type
, cu
);
3977 /* Called when we find the DIE that starts a structure or union scope
3978 (definition) to process all dies that define the members of the
3981 NOTE: we need to call struct_type regardless of whether or not the
3982 DIE has an at_name attribute, since it might be an anonymous
3983 structure or union. This gets the type entered into our set of
3986 However, if the structure is incomplete (an opaque struct/union)
3987 then suppress creating a symbol table entry for it since gdb only
3988 wants to find the one with the complete definition. Note that if
3989 it is complete, we just call new_symbol, which does it's own
3990 checking about whether the struct/union is anonymous or not (and
3991 suppresses creating a symbol table entry itself). */
3993 static struct type
*
3994 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3996 struct objfile
*objfile
= cu
->objfile
;
3998 struct attribute
*attr
;
3999 const char *previous_prefix
= processing_current_prefix
;
4000 struct cleanup
*back_to
= NULL
;
4003 type
= quirk_gcc_member_function_pointer (die
, cu
);
4007 type
= alloc_type (objfile
);
4008 INIT_CPLUS_SPECIFIC (type
);
4009 name
= dwarf2_name (die
, cu
);
4012 if (cu
->language
== language_cplus
4013 || cu
->language
== language_java
)
4015 char *new_prefix
= determine_class_name (die
, cu
);
4016 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
4017 strlen (new_prefix
),
4018 &objfile
->objfile_obstack
);
4019 back_to
= make_cleanup (xfree
, new_prefix
);
4020 processing_current_prefix
= new_prefix
;
4024 /* The name is already allocated along with this objfile, so
4025 we don't need to duplicate it for the type. */
4026 TYPE_TAG_NAME (type
) = name
;
4030 if (die
->tag
== DW_TAG_structure_type
)
4032 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4034 else if (die
->tag
== DW_TAG_union_type
)
4036 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4040 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4042 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4045 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4048 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4052 TYPE_LENGTH (type
) = 0;
4055 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
4056 if (die_is_declaration (die
, cu
))
4057 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4059 /* We need to add the type field to the die immediately so we don't
4060 infinitely recurse when dealing with pointers to the structure
4061 type within the structure itself. */
4062 set_die_type (die
, type
, cu
);
4064 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4066 struct field_info fi
;
4067 struct die_info
*child_die
;
4068 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
4070 memset (&fi
, 0, sizeof (struct field_info
));
4072 child_die
= die
->child
;
4074 while (child_die
&& child_die
->tag
)
4076 if (child_die
->tag
== DW_TAG_member
4077 || child_die
->tag
== DW_TAG_variable
)
4079 /* NOTE: carlton/2002-11-05: A C++ static data member
4080 should be a DW_TAG_member that is a declaration, but
4081 all versions of G++ as of this writing (so through at
4082 least 3.2.1) incorrectly generate DW_TAG_variable
4083 tags for them instead. */
4084 dwarf2_add_field (&fi
, child_die
, cu
);
4086 else if (child_die
->tag
== DW_TAG_subprogram
)
4088 /* C++ member function. */
4089 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
4091 else if (child_die
->tag
== DW_TAG_inheritance
)
4093 /* C++ base class field. */
4094 dwarf2_add_field (&fi
, child_die
, cu
);
4096 child_die
= sibling_die (child_die
);
4099 /* Attach fields and member functions to the type. */
4101 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
4104 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
4106 /* Get the type which refers to the base class (possibly this
4107 class itself) which contains the vtable pointer for the current
4108 class from the DW_AT_containing_type attribute. */
4110 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4112 struct type
*t
= die_containing_type (die
, cu
);
4114 TYPE_VPTR_BASETYPE (type
) = t
;
4119 /* Our own class provides vtbl ptr. */
4120 for (i
= TYPE_NFIELDS (t
) - 1;
4121 i
>= TYPE_N_BASECLASSES (t
);
4124 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
4126 if (is_vtable_name (fieldname
, cu
))
4128 TYPE_VPTR_FIELDNO (type
) = i
;
4133 /* Complain if virtual function table field not found. */
4134 if (i
< TYPE_N_BASECLASSES (t
))
4135 complaint (&symfile_complaints
,
4136 _("virtual function table pointer not found when defining class '%s'"),
4137 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
4142 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4145 else if (cu
->producer
4146 && strncmp (cu
->producer
,
4147 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4149 /* The IBM XLC compiler does not provide direct indication
4150 of the containing type, but the vtable pointer is
4151 always named __vfp. */
4155 for (i
= TYPE_NFIELDS (type
) - 1;
4156 i
>= TYPE_N_BASECLASSES (type
);
4159 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4161 TYPE_VPTR_FIELDNO (type
) = i
;
4162 TYPE_VPTR_BASETYPE (type
) = type
;
4169 do_cleanups (back_to
);
4172 processing_current_prefix
= previous_prefix
;
4173 if (back_to
!= NULL
)
4174 do_cleanups (back_to
);
4180 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4182 struct objfile
*objfile
= cu
->objfile
;
4183 const char *previous_prefix
= processing_current_prefix
;
4184 struct die_info
*child_die
= die
->child
;
4185 struct type
*this_type
;
4187 this_type
= get_die_type (die
, cu
);
4188 if (this_type
== NULL
)
4189 this_type
= read_structure_type (die
, cu
);
4190 if (TYPE_TAG_NAME (this_type
) != NULL
)
4191 processing_current_prefix
= TYPE_TAG_NAME (this_type
);
4193 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4194 snapshots) has been known to create a die giving a declaration
4195 for a class that has, as a child, a die giving a definition for a
4196 nested class. So we have to process our children even if the
4197 current die is a declaration. Normally, of course, a declaration
4198 won't have any children at all. */
4200 while (child_die
!= NULL
&& child_die
->tag
)
4202 if (child_die
->tag
== DW_TAG_member
4203 || child_die
->tag
== DW_TAG_variable
4204 || child_die
->tag
== DW_TAG_inheritance
)
4209 process_die (child_die
, cu
);
4211 child_die
= sibling_die (child_die
);
4214 /* Do not consider external references. According to the DWARF standard,
4215 these DIEs are identified by the fact that they have no byte_size
4216 attribute, and a declaration attribute. */
4217 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4218 || !die_is_declaration (die
, cu
))
4219 new_symbol (die
, this_type
, cu
);
4221 processing_current_prefix
= previous_prefix
;
4224 /* Given a DW_AT_enumeration_type die, set its type. We do not
4225 complete the type's fields yet, or create any symbols. */
4227 static struct type
*
4228 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4230 struct objfile
*objfile
= cu
->objfile
;
4232 struct attribute
*attr
;
4235 type
= alloc_type (objfile
);
4237 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4238 name
= dwarf2_name (die
, cu
);
4241 if (processing_has_namespace_info
)
4243 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4244 processing_current_prefix
,
4249 /* The name is already allocated along with this objfile, so
4250 we don't need to duplicate it for the type. */
4251 TYPE_TAG_NAME (type
) = name
;
4255 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4258 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4262 TYPE_LENGTH (type
) = 0;
4265 /* The enumeration DIE can be incomplete. In Ada, any type can be
4266 declared as private in the package spec, and then defined only
4267 inside the package body. Such types are known as Taft Amendment
4268 Types. When another package uses such a type, an incomplete DIE
4269 may be generated by the compiler. */
4270 if (die_is_declaration (die
, cu
))
4271 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4273 return set_die_type (die
, type
, cu
);
4276 /* Determine the name of the type represented by DIE, which should be
4277 a named C++ or Java compound type. Return the name in question; the caller
4278 is responsible for xfree()'ing it. */
4281 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4283 struct cleanup
*back_to
= NULL
;
4284 struct die_info
*spec_die
= die_specification (die
, cu
);
4285 char *new_prefix
= NULL
;
4287 /* If this is the definition of a class that is declared by another
4288 die, then processing_current_prefix may not be accurate; see
4289 read_func_scope for a similar example. */
4290 if (spec_die
!= NULL
)
4292 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4293 processing_current_prefix
= specification_prefix
;
4294 back_to
= make_cleanup (xfree
, specification_prefix
);
4297 /* If we don't have namespace debug info, guess the name by trying
4298 to demangle the names of members, just like we did in
4299 guess_structure_name. */
4300 if (!processing_has_namespace_info
)
4302 struct die_info
*child
;
4304 for (child
= die
->child
;
4305 child
!= NULL
&& child
->tag
!= 0;
4306 child
= sibling_die (child
))
4308 if (child
->tag
== DW_TAG_subprogram
)
4311 = language_class_name_from_physname (cu
->language_defn
,
4315 if (new_prefix
!= NULL
)
4321 if (new_prefix
== NULL
)
4323 const char *name
= dwarf2_name (die
, cu
);
4324 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4325 name
? name
: "<<anonymous>>",
4329 if (back_to
!= NULL
)
4330 do_cleanups (back_to
);
4335 /* Given a pointer to a die which begins an enumeration, process all
4336 the dies that define the members of the enumeration, and create the
4337 symbol for the enumeration type.
4339 NOTE: We reverse the order of the element list. */
4342 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4344 struct objfile
*objfile
= cu
->objfile
;
4345 struct die_info
*child_die
;
4346 struct field
*fields
;
4349 int unsigned_enum
= 1;
4351 struct type
*this_type
;
4355 this_type
= get_die_type (die
, cu
);
4356 if (this_type
== NULL
)
4357 this_type
= read_enumeration_type (die
, cu
);
4358 if (die
->child
!= NULL
)
4360 child_die
= die
->child
;
4361 while (child_die
&& child_die
->tag
)
4363 if (child_die
->tag
!= DW_TAG_enumerator
)
4365 process_die (child_die
, cu
);
4369 name
= dwarf2_name (child_die
, cu
);
4372 sym
= new_symbol (child_die
, this_type
, cu
);
4373 if (SYMBOL_VALUE (sym
) < 0)
4376 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4378 fields
= (struct field
*)
4380 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4381 * sizeof (struct field
));
4384 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4385 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4386 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4387 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4388 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4394 child_die
= sibling_die (child_die
);
4399 TYPE_NFIELDS (this_type
) = num_fields
;
4400 TYPE_FIELDS (this_type
) = (struct field
*)
4401 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
4402 memcpy (TYPE_FIELDS (this_type
), fields
,
4403 sizeof (struct field
) * num_fields
);
4407 TYPE_FLAGS (this_type
) |= TYPE_FLAG_UNSIGNED
;
4410 new_symbol (die
, this_type
, cu
);
4413 /* Extract all information from a DW_TAG_array_type DIE and put it in
4414 the DIE's type field. For now, this only handles one dimensional
4417 static struct type
*
4418 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4420 struct objfile
*objfile
= cu
->objfile
;
4421 struct die_info
*child_die
;
4422 struct type
*type
= NULL
;
4423 struct type
*element_type
, *range_type
, *index_type
;
4424 struct type
**range_types
= NULL
;
4425 struct attribute
*attr
;
4427 struct cleanup
*back_to
;
4430 element_type
= die_type (die
, cu
);
4432 /* Irix 6.2 native cc creates array types without children for
4433 arrays with unspecified length. */
4434 if (die
->child
== NULL
)
4436 index_type
= builtin_type_int32
;
4437 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4438 type
= create_array_type (NULL
, element_type
, range_type
);
4439 return set_die_type (die
, type
, cu
);
4442 back_to
= make_cleanup (null_cleanup
, NULL
);
4443 child_die
= die
->child
;
4444 while (child_die
&& child_die
->tag
)
4446 if (child_die
->tag
== DW_TAG_subrange_type
)
4448 struct type
*child_type
= read_type_die (child_die
, cu
);
4449 if (child_type
!= NULL
)
4451 /* The range type was succesfully read. Save it for
4452 the array type creation. */
4453 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4455 range_types
= (struct type
**)
4456 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4457 * sizeof (struct type
*));
4459 make_cleanup (free_current_contents
, &range_types
);
4461 range_types
[ndim
++] = child_type
;
4464 child_die
= sibling_die (child_die
);
4467 /* Dwarf2 dimensions are output from left to right, create the
4468 necessary array types in backwards order. */
4470 type
= element_type
;
4472 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4476 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4481 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4484 /* Understand Dwarf2 support for vector types (like they occur on
4485 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4486 array type. This is not part of the Dwarf2/3 standard yet, but a
4487 custom vendor extension. The main difference between a regular
4488 array and the vector variant is that vectors are passed by value
4490 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4492 make_vector_type (type
);
4494 name
= dwarf2_name (die
, cu
);
4496 TYPE_NAME (type
) = name
;
4498 do_cleanups (back_to
);
4500 /* Install the type in the die. */
4501 return set_die_type (die
, type
, cu
);
4504 static enum dwarf_array_dim_ordering
4505 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4507 struct attribute
*attr
;
4509 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4511 if (attr
) return DW_SND (attr
);
4514 GNU F77 is a special case, as at 08/2004 array type info is the
4515 opposite order to the dwarf2 specification, but data is still
4516 laid out as per normal fortran.
4518 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4522 if (cu
->language
== language_fortran
&&
4523 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4525 return DW_ORD_row_major
;
4528 switch (cu
->language_defn
->la_array_ordering
)
4530 case array_column_major
:
4531 return DW_ORD_col_major
;
4532 case array_row_major
:
4534 return DW_ORD_row_major
;
4538 /* Extract all information from a DW_TAG_set_type DIE and put it in
4539 the DIE's type field. */
4541 static struct type
*
4542 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4544 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
4546 return set_die_type (die
, set_type
, cu
);
4549 /* First cut: install each common block member as a global variable. */
4552 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4554 struct die_info
*child_die
;
4555 struct attribute
*attr
;
4557 CORE_ADDR base
= (CORE_ADDR
) 0;
4559 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4562 /* Support the .debug_loc offsets */
4563 if (attr_form_is_block (attr
))
4565 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4567 else if (attr_form_is_section_offset (attr
))
4569 dwarf2_complex_location_expr_complaint ();
4573 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4574 "common block member");
4577 if (die
->child
!= NULL
)
4579 child_die
= die
->child
;
4580 while (child_die
&& child_die
->tag
)
4582 sym
= new_symbol (child_die
, NULL
, cu
);
4583 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4586 SYMBOL_VALUE_ADDRESS (sym
) =
4587 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4588 add_symbol_to_list (sym
, &global_symbols
);
4590 child_die
= sibling_die (child_die
);
4595 /* Read a C++ namespace. */
4598 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4600 struct objfile
*objfile
= cu
->objfile
;
4601 const char *previous_prefix
= processing_current_prefix
;
4604 struct die_info
*current_die
;
4605 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4607 name
= namespace_name (die
, &is_anonymous
, cu
);
4609 /* Now build the name of the current namespace. */
4611 if (previous_prefix
[0] == '\0')
4613 processing_current_prefix
= name
;
4617 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4618 make_cleanup (xfree
, temp_name
);
4619 processing_current_prefix
= temp_name
;
4622 /* Add a symbol associated to this if we haven't seen the namespace
4623 before. Also, add a using directive if it's an anonymous
4626 if (dwarf2_extension (die
, cu
) == NULL
)
4630 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4631 this cast will hopefully become unnecessary. */
4632 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4633 (char *) processing_current_prefix
,
4635 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4637 new_symbol (die
, type
, cu
);
4638 set_die_type (die
, type
, cu
);
4641 cp_add_using_directive (processing_current_prefix
,
4642 strlen (previous_prefix
),
4643 strlen (processing_current_prefix
));
4646 if (die
->child
!= NULL
)
4648 struct die_info
*child_die
= die
->child
;
4650 while (child_die
&& child_die
->tag
)
4652 process_die (child_die
, cu
);
4653 child_die
= sibling_die (child_die
);
4657 processing_current_prefix
= previous_prefix
;
4658 do_cleanups (back_to
);
4661 /* Return the name of the namespace represented by DIE. Set
4662 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4666 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4668 struct die_info
*current_die
;
4669 const char *name
= NULL
;
4671 /* Loop through the extensions until we find a name. */
4673 for (current_die
= die
;
4674 current_die
!= NULL
;
4675 current_die
= dwarf2_extension (die
, cu
))
4677 name
= dwarf2_name (current_die
, cu
);
4682 /* Is it an anonymous namespace? */
4684 *is_anonymous
= (name
== NULL
);
4686 name
= "(anonymous namespace)";
4691 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4692 the user defined type vector. */
4694 static struct type
*
4695 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4697 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
4698 struct comp_unit_head
*cu_header
= &cu
->header
;
4700 struct attribute
*attr_byte_size
;
4701 struct attribute
*attr_address_class
;
4702 int byte_size
, addr_class
;
4704 type
= lookup_pointer_type (die_type (die
, cu
));
4706 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4708 byte_size
= DW_UNSND (attr_byte_size
);
4710 byte_size
= cu_header
->addr_size
;
4712 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4713 if (attr_address_class
)
4714 addr_class
= DW_UNSND (attr_address_class
);
4716 addr_class
= DW_ADDR_none
;
4718 /* If the pointer size or address class is different than the
4719 default, create a type variant marked as such and set the
4720 length accordingly. */
4721 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4723 if (gdbarch_address_class_type_flags_p (gdbarch
))
4727 type_flags
= gdbarch_address_class_type_flags
4728 (gdbarch
, byte_size
, addr_class
);
4729 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4730 type
= make_type_with_address_space (type
, type_flags
);
4732 else if (TYPE_LENGTH (type
) != byte_size
)
4734 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4737 /* Should we also complain about unhandled address classes? */
4741 TYPE_LENGTH (type
) = byte_size
;
4742 return set_die_type (die
, type
, cu
);
4745 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4746 the user defined type vector. */
4748 static struct type
*
4749 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4751 struct objfile
*objfile
= cu
->objfile
;
4753 struct type
*to_type
;
4754 struct type
*domain
;
4756 to_type
= die_type (die
, cu
);
4757 domain
= die_containing_type (die
, cu
);
4759 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4760 type
= lookup_methodptr_type (to_type
);
4762 type
= lookup_memberptr_type (to_type
, domain
);
4764 return set_die_type (die
, type
, cu
);
4767 /* Extract all information from a DW_TAG_reference_type DIE and add to
4768 the user defined type vector. */
4770 static struct type
*
4771 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4773 struct comp_unit_head
*cu_header
= &cu
->header
;
4775 struct attribute
*attr
;
4777 type
= lookup_reference_type (die_type (die
, cu
));
4778 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4781 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4785 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4787 return set_die_type (die
, type
, cu
);
4790 static struct type
*
4791 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4793 struct type
*base_type
, *cv_type
;
4795 base_type
= die_type (die
, cu
);
4796 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
4797 return set_die_type (die
, cv_type
, cu
);
4800 static struct type
*
4801 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4803 struct type
*base_type
, *cv_type
;
4805 base_type
= die_type (die
, cu
);
4806 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
4807 return set_die_type (die
, cv_type
, cu
);
4810 /* Extract all information from a DW_TAG_string_type DIE and add to
4811 the user defined type vector. It isn't really a user defined type,
4812 but it behaves like one, with other DIE's using an AT_user_def_type
4813 attribute to reference it. */
4815 static struct type
*
4816 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4818 struct objfile
*objfile
= cu
->objfile
;
4819 struct type
*type
, *range_type
, *index_type
, *char_type
;
4820 struct attribute
*attr
;
4821 unsigned int length
;
4823 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4826 length
= DW_UNSND (attr
);
4830 /* check for the DW_AT_byte_size attribute */
4831 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4834 length
= DW_UNSND (attr
);
4842 index_type
= builtin_type_int32
;
4843 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4844 type
= create_string_type (NULL
, range_type
);
4846 return set_die_type (die
, type
, cu
);
4849 /* Handle DIES due to C code like:
4853 int (*funcp)(int a, long l);
4857 ('funcp' generates a DW_TAG_subroutine_type DIE)
4860 static struct type
*
4861 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4863 struct type
*type
; /* Type that this function returns */
4864 struct type
*ftype
; /* Function that returns above type */
4865 struct attribute
*attr
;
4867 type
= die_type (die
, cu
);
4868 ftype
= make_function_type (type
, (struct type
**) 0);
4870 /* All functions in C++, Pascal and Java have prototypes. */
4871 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4872 if ((attr
&& (DW_UNSND (attr
) != 0))
4873 || cu
->language
== language_cplus
4874 || cu
->language
== language_java
4875 || cu
->language
== language_pascal
)
4876 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4878 /* Store the calling convention in the type if it's available in
4879 the subroutine die. Otherwise set the calling convention to
4880 the default value DW_CC_normal. */
4881 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
4882 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
4884 if (die
->child
!= NULL
)
4886 struct die_info
*child_die
;
4890 /* Count the number of parameters.
4891 FIXME: GDB currently ignores vararg functions, but knows about
4892 vararg member functions. */
4893 child_die
= die
->child
;
4894 while (child_die
&& child_die
->tag
)
4896 if (child_die
->tag
== DW_TAG_formal_parameter
)
4898 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4899 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4900 child_die
= sibling_die (child_die
);
4903 /* Allocate storage for parameters and fill them in. */
4904 TYPE_NFIELDS (ftype
) = nparams
;
4905 TYPE_FIELDS (ftype
) = (struct field
*)
4906 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4908 child_die
= die
->child
;
4909 while (child_die
&& child_die
->tag
)
4911 if (child_die
->tag
== DW_TAG_formal_parameter
)
4913 /* Dwarf2 has no clean way to discern C++ static and non-static
4914 member functions. G++ helps GDB by marking the first
4915 parameter for non-static member functions (which is the
4916 this pointer) as artificial. We pass this information
4917 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4918 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4920 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4922 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4923 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4926 child_die
= sibling_die (child_die
);
4930 return set_die_type (die
, ftype
, cu
);
4933 static struct type
*
4934 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4936 struct objfile
*objfile
= cu
->objfile
;
4937 struct attribute
*attr
;
4939 struct type
*this_type
;
4941 name
= dwarf2_name (die
, cu
);
4942 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
4943 TYPE_FLAG_TARGET_STUB
, name
, objfile
);
4944 set_die_type (die
, this_type
, cu
);
4945 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
4949 /* Find a representation of a given base type and install
4950 it in the TYPE field of the die. */
4952 static struct type
*
4953 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4955 struct objfile
*objfile
= cu
->objfile
;
4957 struct attribute
*attr
;
4958 int encoding
= 0, size
= 0;
4960 enum type_code code
= TYPE_CODE_INT
;
4962 struct type
*target_type
= NULL
;
4964 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4967 encoding
= DW_UNSND (attr
);
4969 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4972 size
= DW_UNSND (attr
);
4974 name
= dwarf2_name (die
, cu
);
4977 complaint (&symfile_complaints
,
4978 _("DW_AT_name missing from DW_TAG_base_type"));
4983 case DW_ATE_address
:
4984 /* Turn DW_ATE_address into a void * pointer. */
4985 code
= TYPE_CODE_PTR
;
4986 type_flags
|= TYPE_FLAG_UNSIGNED
;
4987 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
4989 case DW_ATE_boolean
:
4990 code
= TYPE_CODE_BOOL
;
4991 type_flags
|= TYPE_FLAG_UNSIGNED
;
4993 case DW_ATE_complex_float
:
4994 code
= TYPE_CODE_COMPLEX
;
4995 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
4997 case DW_ATE_decimal_float
:
4998 code
= TYPE_CODE_DECFLOAT
;
5001 code
= TYPE_CODE_FLT
;
5005 case DW_ATE_unsigned
:
5006 type_flags
|= TYPE_FLAG_UNSIGNED
;
5008 case DW_ATE_signed_char
:
5009 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5010 code
= TYPE_CODE_CHAR
;
5012 case DW_ATE_unsigned_char
:
5013 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5014 code
= TYPE_CODE_CHAR
;
5015 type_flags
|= TYPE_FLAG_UNSIGNED
;
5018 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5019 dwarf_type_encoding_name (encoding
));
5023 type
= init_type (code
, size
, type_flags
, name
, objfile
);
5024 TYPE_TARGET_TYPE (type
) = target_type
;
5026 return set_die_type (die
, type
, cu
);
5029 /* Read the given DW_AT_subrange DIE. */
5031 static struct type
*
5032 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5034 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5035 struct type
*base_type
;
5036 struct type
*range_type
;
5037 struct attribute
*attr
;
5042 base_type
= die_type (die
, cu
);
5043 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5045 complaint (&symfile_complaints
,
5046 _("DW_AT_type missing from DW_TAG_subrange_type"));
5048 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5049 0, NULL
, cu
->objfile
);
5052 if (cu
->language
== language_fortran
)
5054 /* FORTRAN implies a lower bound of 1, if not given. */
5058 /* FIXME: For variable sized arrays either of these could be
5059 a variable rather than a constant value. We'll allow it,
5060 but we don't know how to handle it. */
5061 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5063 low
= dwarf2_get_attr_constant_value (attr
, 0);
5065 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5068 if (attr
->form
== DW_FORM_block1
)
5070 /* GCC encodes arrays with unspecified or dynamic length
5071 with a DW_FORM_block1 attribute.
5072 FIXME: GDB does not yet know how to handle dynamic
5073 arrays properly, treat them as arrays with unspecified
5076 FIXME: jimb/2003-09-22: GDB does not really know
5077 how to handle arrays of unspecified length
5078 either; we just represent them as zero-length
5079 arrays. Choose an appropriate upper bound given
5080 the lower bound we've computed above. */
5084 high
= dwarf2_get_attr_constant_value (attr
, 1);
5087 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5089 name
= dwarf2_name (die
, cu
);
5091 TYPE_NAME (range_type
) = name
;
5093 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5095 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5097 return set_die_type (die
, range_type
, cu
);
5100 static struct type
*
5101 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5105 /* For now, we only support the C meaning of an unspecified type: void. */
5107 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5110 return set_die_type (die
, type
, cu
);
5113 /* Trivial hash function for die_info: the hash value of a DIE
5114 is its offset in .debug_info for this objfile. */
5117 die_hash (const void *item
)
5119 const struct die_info
*die
= item
;
5123 /* Trivial comparison function for die_info structures: two DIEs
5124 are equal if they have the same offset. */
5127 die_eq (const void *item_lhs
, const void *item_rhs
)
5129 const struct die_info
*die_lhs
= item_lhs
;
5130 const struct die_info
*die_rhs
= item_rhs
;
5131 return die_lhs
->offset
== die_rhs
->offset
;
5134 /* Read a whole compilation unit into a linked list of dies. */
5136 static struct die_info
*
5137 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5140 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5144 &cu
->comp_unit_obstack
,
5145 hashtab_obstack_allocate
,
5146 dummy_obstack_deallocate
);
5148 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5151 /* Read a single die and all its descendents. Set the die's sibling
5152 field to NULL; set other fields in the die correctly, and set all
5153 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5154 location of the info_ptr after reading all of those dies. PARENT
5155 is the parent of the die in question. */
5157 static struct die_info
*
5158 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5159 struct dwarf2_cu
*cu
,
5160 gdb_byte
**new_info_ptr
,
5161 struct die_info
*parent
)
5163 struct die_info
*die
;
5167 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5170 *new_info_ptr
= cur_ptr
;
5173 store_in_ref_table (die
, cu
);
5177 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5183 *new_info_ptr
= cur_ptr
;
5186 die
->sibling
= NULL
;
5187 die
->parent
= parent
;
5191 /* Read a die, all of its descendents, and all of its siblings; set
5192 all of the fields of all of the dies correctly. Arguments are as
5193 in read_die_and_children. */
5195 static struct die_info
*
5196 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5197 struct dwarf2_cu
*cu
,
5198 gdb_byte
**new_info_ptr
,
5199 struct die_info
*parent
)
5201 struct die_info
*first_die
, *last_sibling
;
5205 first_die
= last_sibling
= NULL
;
5209 struct die_info
*die
5210 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5214 *new_info_ptr
= cur_ptr
;
5221 last_sibling
->sibling
= die
;
5227 /* Decompress a section that was compressed using zlib. Store the
5228 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
5231 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
5232 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
5234 bfd
*abfd
= objfile
->obfd
;
5236 error (_("Support for zlib-compressed DWARF data (from '%s') "
5237 "is disabled in this copy of GDB"),
5238 bfd_get_filename (abfd
));
5240 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
5241 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
5242 bfd_size_type uncompressed_size
;
5243 gdb_byte
*uncompressed_buffer
;
5246 int header_size
= 12;
5248 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5249 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
5250 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5251 bfd_get_filename (abfd
));
5253 /* Read the zlib header. In this case, it should be "ZLIB" followed
5254 by the uncompressed section size, 8 bytes in big-endian order. */
5255 if (compressed_size
< header_size
5256 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
5257 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
5258 bfd_get_filename (abfd
));
5259 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
5260 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
5261 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
5262 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
5263 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
5264 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
5265 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
5266 uncompressed_size
+= compressed_buffer
[11];
5268 /* It is possible the section consists of several compressed
5269 buffers concatenated together, so we uncompress in a loop. */
5273 strm
.avail_in
= compressed_size
- header_size
;
5274 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
5275 strm
.avail_out
= uncompressed_size
;
5276 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
5278 rc
= inflateInit (&strm
);
5279 while (strm
.avail_in
> 0)
5282 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
5283 bfd_get_filename (abfd
), rc
);
5284 strm
.next_out
= ((Bytef
*) uncompressed_buffer
5285 + (uncompressed_size
- strm
.avail_out
));
5286 rc
= inflate (&strm
, Z_FINISH
);
5287 if (rc
!= Z_STREAM_END
)
5288 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
5289 bfd_get_filename (abfd
), rc
);
5290 rc
= inflateReset (&strm
);
5292 rc
= inflateEnd (&strm
);
5294 || strm
.avail_out
!= 0)
5295 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
5296 bfd_get_filename (abfd
), rc
);
5298 xfree (compressed_buffer
);
5299 *outbuf
= uncompressed_buffer
;
5300 *outsize
= uncompressed_size
;
5305 /* Read the contents of the section at OFFSET and of size SIZE from the
5306 object file specified by OBJFILE into the objfile_obstack and return it.
5307 If the section is compressed, uncompress it before returning. */
5310 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5312 bfd
*abfd
= objfile
->obfd
;
5313 gdb_byte
*buf
, *retbuf
;
5314 bfd_size_type size
= bfd_get_section_size (sectp
);
5315 unsigned char header
[4];
5320 /* Check if the file has a 4-byte header indicating compression. */
5321 if (size
> sizeof (header
)
5322 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
5323 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
5325 /* Upon decompression, update the buffer and its size. */
5326 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
5328 zlib_decompress_section (objfile
, sectp
, &buf
, &size
);
5329 dwarf2_resize_section (sectp
, size
);
5334 /* If we get here, we are a normal, not-compressed section. */
5335 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5336 /* When debugging .o files, we may need to apply relocations; see
5337 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
5338 We never compress sections in .o files, so we only need to
5339 try this when the section is not compressed. */
5340 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5344 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5345 || bfd_bread (buf
, size
, abfd
) != size
)
5346 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5347 bfd_get_filename (abfd
));
5352 /* In DWARF version 2, the description of the debugging information is
5353 stored in a separate .debug_abbrev section. Before we read any
5354 dies from a section we read in all abbreviations and install them
5355 in a hash table. This function also sets flags in CU describing
5356 the data found in the abbrev table. */
5359 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5361 struct comp_unit_head
*cu_header
= &cu
->header
;
5362 gdb_byte
*abbrev_ptr
;
5363 struct abbrev_info
*cur_abbrev
;
5364 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5365 unsigned int abbrev_form
, hash_number
;
5366 struct attr_abbrev
*cur_attrs
;
5367 unsigned int allocated_attrs
;
5369 /* Initialize dwarf2 abbrevs */
5370 obstack_init (&cu
->abbrev_obstack
);
5371 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5373 * sizeof (struct abbrev_info
*)));
5374 memset (cu
->dwarf2_abbrevs
, 0,
5375 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5377 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5378 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5379 abbrev_ptr
+= bytes_read
;
5381 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5382 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5384 /* loop until we reach an abbrev number of 0 */
5385 while (abbrev_number
)
5387 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5389 /* read in abbrev header */
5390 cur_abbrev
->number
= abbrev_number
;
5391 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5392 abbrev_ptr
+= bytes_read
;
5393 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5396 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5397 cu
->has_namespace_info
= 1;
5399 /* now read in declarations */
5400 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5401 abbrev_ptr
+= bytes_read
;
5402 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5403 abbrev_ptr
+= bytes_read
;
5406 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5408 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5410 = xrealloc (cur_attrs
, (allocated_attrs
5411 * sizeof (struct attr_abbrev
)));
5414 /* Record whether this compilation unit might have
5415 inter-compilation-unit references. If we don't know what form
5416 this attribute will have, then it might potentially be a
5417 DW_FORM_ref_addr, so we conservatively expect inter-CU
5420 if (abbrev_form
== DW_FORM_ref_addr
5421 || abbrev_form
== DW_FORM_indirect
)
5422 cu
->has_form_ref_addr
= 1;
5424 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5425 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5426 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5427 abbrev_ptr
+= bytes_read
;
5428 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5429 abbrev_ptr
+= bytes_read
;
5432 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5433 (cur_abbrev
->num_attrs
5434 * sizeof (struct attr_abbrev
)));
5435 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5436 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5438 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5439 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5440 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5442 /* Get next abbreviation.
5443 Under Irix6 the abbreviations for a compilation unit are not
5444 always properly terminated with an abbrev number of 0.
5445 Exit loop if we encounter an abbreviation which we have
5446 already read (which means we are about to read the abbreviations
5447 for the next compile unit) or if the end of the abbreviation
5448 table is reached. */
5449 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5450 >= dwarf2_per_objfile
->abbrev_size
)
5452 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5453 abbrev_ptr
+= bytes_read
;
5454 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5461 /* Release the memory used by the abbrev table for a compilation unit. */
5464 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5466 struct dwarf2_cu
*cu
= ptr_to_cu
;
5468 obstack_free (&cu
->abbrev_obstack
, NULL
);
5469 cu
->dwarf2_abbrevs
= NULL
;
5472 /* Lookup an abbrev_info structure in the abbrev hash table. */
5474 static struct abbrev_info
*
5475 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5477 unsigned int hash_number
;
5478 struct abbrev_info
*abbrev
;
5480 hash_number
= number
% ABBREV_HASH_SIZE
;
5481 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5485 if (abbrev
->number
== number
)
5488 abbrev
= abbrev
->next
;
5493 /* Returns nonzero if TAG represents a type that we might generate a partial
5497 is_type_tag_for_partial (int tag
)
5502 /* Some types that would be reasonable to generate partial symbols for,
5503 that we don't at present. */
5504 case DW_TAG_array_type
:
5505 case DW_TAG_file_type
:
5506 case DW_TAG_ptr_to_member_type
:
5507 case DW_TAG_set_type
:
5508 case DW_TAG_string_type
:
5509 case DW_TAG_subroutine_type
:
5511 case DW_TAG_base_type
:
5512 case DW_TAG_class_type
:
5513 case DW_TAG_interface_type
:
5514 case DW_TAG_enumeration_type
:
5515 case DW_TAG_structure_type
:
5516 case DW_TAG_subrange_type
:
5517 case DW_TAG_typedef
:
5518 case DW_TAG_union_type
:
5525 /* Load all DIEs that are interesting for partial symbols into memory. */
5527 static struct partial_die_info
*
5528 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5529 struct dwarf2_cu
*cu
)
5531 struct partial_die_info
*part_die
;
5532 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5533 struct abbrev_info
*abbrev
;
5534 unsigned int bytes_read
;
5535 unsigned int load_all
= 0;
5537 int nesting_level
= 1;
5542 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5546 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5550 &cu
->comp_unit_obstack
,
5551 hashtab_obstack_allocate
,
5552 dummy_obstack_deallocate
);
5554 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5555 sizeof (struct partial_die_info
));
5559 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5561 /* A NULL abbrev means the end of a series of children. */
5564 if (--nesting_level
== 0)
5566 /* PART_DIE was probably the last thing allocated on the
5567 comp_unit_obstack, so we could call obstack_free
5568 here. We don't do that because the waste is small,
5569 and will be cleaned up when we're done with this
5570 compilation unit. This way, we're also more robust
5571 against other users of the comp_unit_obstack. */
5574 info_ptr
+= bytes_read
;
5575 last_die
= parent_die
;
5576 parent_die
= parent_die
->die_parent
;
5580 /* Check whether this DIE is interesting enough to save. Normally
5581 we would not be interested in members here, but there may be
5582 later variables referencing them via DW_AT_specification (for
5585 && !is_type_tag_for_partial (abbrev
->tag
)
5586 && abbrev
->tag
!= DW_TAG_enumerator
5587 && abbrev
->tag
!= DW_TAG_subprogram
5588 && abbrev
->tag
!= DW_TAG_variable
5589 && abbrev
->tag
!= DW_TAG_namespace
5590 && abbrev
->tag
!= DW_TAG_member
)
5592 /* Otherwise we skip to the next sibling, if any. */
5593 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5597 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5598 abfd
, info_ptr
, cu
);
5600 /* This two-pass algorithm for processing partial symbols has a
5601 high cost in cache pressure. Thus, handle some simple cases
5602 here which cover the majority of C partial symbols. DIEs
5603 which neither have specification tags in them, nor could have
5604 specification tags elsewhere pointing at them, can simply be
5605 processed and discarded.
5607 This segment is also optional; scan_partial_symbols and
5608 add_partial_symbol will handle these DIEs if we chain
5609 them in normally. When compilers which do not emit large
5610 quantities of duplicate debug information are more common,
5611 this code can probably be removed. */
5613 /* Any complete simple types at the top level (pretty much all
5614 of them, for a language without namespaces), can be processed
5616 if (parent_die
== NULL
5617 && part_die
->has_specification
== 0
5618 && part_die
->is_declaration
== 0
5619 && (part_die
->tag
== DW_TAG_typedef
5620 || part_die
->tag
== DW_TAG_base_type
5621 || part_die
->tag
== DW_TAG_subrange_type
))
5623 if (building_psymtab
&& part_die
->name
!= NULL
)
5624 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5625 VAR_DOMAIN
, LOC_TYPEDEF
,
5626 &cu
->objfile
->static_psymbols
,
5627 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5628 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5632 /* If we're at the second level, and we're an enumerator, and
5633 our parent has no specification (meaning possibly lives in a
5634 namespace elsewhere), then we can add the partial symbol now
5635 instead of queueing it. */
5636 if (part_die
->tag
== DW_TAG_enumerator
5637 && parent_die
!= NULL
5638 && parent_die
->die_parent
== NULL
5639 && parent_die
->tag
== DW_TAG_enumeration_type
5640 && parent_die
->has_specification
== 0)
5642 if (part_die
->name
== NULL
)
5643 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5644 else if (building_psymtab
)
5645 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5646 VAR_DOMAIN
, LOC_CONST
,
5647 (cu
->language
== language_cplus
5648 || cu
->language
== language_java
)
5649 ? &cu
->objfile
->global_psymbols
5650 : &cu
->objfile
->static_psymbols
,
5651 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5653 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5657 /* We'll save this DIE so link it in. */
5658 part_die
->die_parent
= parent_die
;
5659 part_die
->die_sibling
= NULL
;
5660 part_die
->die_child
= NULL
;
5662 if (last_die
&& last_die
== parent_die
)
5663 last_die
->die_child
= part_die
;
5665 last_die
->die_sibling
= part_die
;
5667 last_die
= part_die
;
5669 if (first_die
== NULL
)
5670 first_die
= part_die
;
5672 /* Maybe add the DIE to the hash table. Not all DIEs that we
5673 find interesting need to be in the hash table, because we
5674 also have the parent/sibling/child chains; only those that we
5675 might refer to by offset later during partial symbol reading.
5677 For now this means things that might have be the target of a
5678 DW_AT_specification, DW_AT_abstract_origin, or
5679 DW_AT_extension. DW_AT_extension will refer only to
5680 namespaces; DW_AT_abstract_origin refers to functions (and
5681 many things under the function DIE, but we do not recurse
5682 into function DIEs during partial symbol reading) and
5683 possibly variables as well; DW_AT_specification refers to
5684 declarations. Declarations ought to have the DW_AT_declaration
5685 flag. It happens that GCC forgets to put it in sometimes, but
5686 only for functions, not for types.
5688 Adding more things than necessary to the hash table is harmless
5689 except for the performance cost. Adding too few will result in
5690 wasted time in find_partial_die, when we reread the compilation
5691 unit with load_all_dies set. */
5694 || abbrev
->tag
== DW_TAG_subprogram
5695 || abbrev
->tag
== DW_TAG_variable
5696 || abbrev
->tag
== DW_TAG_namespace
5697 || part_die
->is_declaration
)
5701 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5702 part_die
->offset
, INSERT
);
5706 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5707 sizeof (struct partial_die_info
));
5709 /* For some DIEs we want to follow their children (if any). For C
5710 we have no reason to follow the children of structures; for other
5711 languages we have to, both so that we can get at method physnames
5712 to infer fully qualified class names, and for DW_AT_specification. */
5713 if (last_die
->has_children
5715 || last_die
->tag
== DW_TAG_namespace
5716 || last_die
->tag
== DW_TAG_enumeration_type
5717 || (cu
->language
!= language_c
5718 && (last_die
->tag
== DW_TAG_class_type
5719 || last_die
->tag
== DW_TAG_interface_type
5720 || last_die
->tag
== DW_TAG_structure_type
5721 || last_die
->tag
== DW_TAG_union_type
))))
5724 parent_die
= last_die
;
5728 /* Otherwise we skip to the next sibling, if any. */
5729 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5731 /* Back to the top, do it again. */
5735 /* Read a minimal amount of information into the minimal die structure. */
5738 read_partial_die (struct partial_die_info
*part_die
,
5739 struct abbrev_info
*abbrev
,
5740 unsigned int abbrev_len
, bfd
*abfd
,
5741 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5743 unsigned int bytes_read
, i
;
5744 struct attribute attr
;
5745 int has_low_pc_attr
= 0;
5746 int has_high_pc_attr
= 0;
5747 CORE_ADDR base_address
= 0;
5751 base_address_low_pc
,
5752 /* Overrides BASE_ADDRESS_LOW_PC. */
5753 base_address_entry_pc
5755 base_address_type
= base_address_none
;
5757 memset (part_die
, 0, sizeof (struct partial_die_info
));
5759 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5761 info_ptr
+= abbrev_len
;
5766 part_die
->tag
= abbrev
->tag
;
5767 part_die
->has_children
= abbrev
->has_children
;
5769 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5771 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5773 /* Store the data if it is of an attribute we want to keep in a
5774 partial symbol table. */
5779 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5780 if (part_die
->name
== NULL
)
5781 part_die
->name
= DW_STRING (&attr
);
5783 case DW_AT_comp_dir
:
5784 if (part_die
->dirname
== NULL
)
5785 part_die
->dirname
= DW_STRING (&attr
);
5787 case DW_AT_MIPS_linkage_name
:
5788 part_die
->name
= DW_STRING (&attr
);
5791 has_low_pc_attr
= 1;
5792 part_die
->lowpc
= DW_ADDR (&attr
);
5793 if (part_die
->tag
== DW_TAG_compile_unit
5794 && base_address_type
< base_address_low_pc
)
5796 base_address
= DW_ADDR (&attr
);
5797 base_address_type
= base_address_low_pc
;
5801 has_high_pc_attr
= 1;
5802 part_die
->highpc
= DW_ADDR (&attr
);
5804 case DW_AT_entry_pc
:
5805 if (part_die
->tag
== DW_TAG_compile_unit
5806 && base_address_type
< base_address_entry_pc
)
5808 base_address
= DW_ADDR (&attr
);
5809 base_address_type
= base_address_entry_pc
;
5813 if (part_die
->tag
== DW_TAG_compile_unit
)
5815 cu
->ranges_offset
= DW_UNSND (&attr
);
5816 cu
->has_ranges_offset
= 1;
5819 case DW_AT_location
:
5820 /* Support the .debug_loc offsets */
5821 if (attr_form_is_block (&attr
))
5823 part_die
->locdesc
= DW_BLOCK (&attr
);
5825 else if (attr_form_is_section_offset (&attr
))
5827 dwarf2_complex_location_expr_complaint ();
5831 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5832 "partial symbol information");
5835 case DW_AT_language
:
5836 part_die
->language
= DW_UNSND (&attr
);
5838 case DW_AT_external
:
5839 part_die
->is_external
= DW_UNSND (&attr
);
5841 case DW_AT_declaration
:
5842 part_die
->is_declaration
= DW_UNSND (&attr
);
5845 part_die
->has_type
= 1;
5847 case DW_AT_abstract_origin
:
5848 case DW_AT_specification
:
5849 case DW_AT_extension
:
5850 part_die
->has_specification
= 1;
5851 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5854 /* Ignore absolute siblings, they might point outside of
5855 the current compile unit. */
5856 if (attr
.form
== DW_FORM_ref_addr
)
5857 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5859 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5860 + dwarf2_get_ref_die_offset (&attr
, cu
);
5862 case DW_AT_stmt_list
:
5863 part_die
->has_stmt_list
= 1;
5864 part_die
->line_offset
= DW_UNSND (&attr
);
5866 case DW_AT_byte_size
:
5867 part_die
->has_byte_size
= 1;
5869 case DW_AT_calling_convention
:
5870 /* DWARF doesn't provide a way to identify a program's source-level
5871 entry point. DW_AT_calling_convention attributes are only meant
5872 to describe functions' calling conventions.
5874 However, because it's a necessary piece of information in
5875 Fortran, and because DW_CC_program is the only piece of debugging
5876 information whose definition refers to a 'main program' at all,
5877 several compilers have begun marking Fortran main programs with
5878 DW_CC_program --- even when those functions use the standard
5879 calling conventions.
5881 So until DWARF specifies a way to provide this information and
5882 compilers pick up the new representation, we'll support this
5884 if (DW_UNSND (&attr
) == DW_CC_program
5885 && cu
->language
== language_fortran
)
5886 set_main_name (part_die
->name
);
5893 /* When using the GNU linker, .gnu.linkonce. sections are used to
5894 eliminate duplicate copies of functions and vtables and such.
5895 The linker will arbitrarily choose one and discard the others.
5896 The AT_*_pc values for such functions refer to local labels in
5897 these sections. If the section from that file was discarded, the
5898 labels are not in the output, so the relocs get a value of 0.
5899 If this is a discarded function, mark the pc bounds as invalid,
5900 so that GDB will ignore it. */
5901 if (has_low_pc_attr
&& has_high_pc_attr
5902 && part_die
->lowpc
< part_die
->highpc
5903 && (part_die
->lowpc
!= 0
5904 || dwarf2_per_objfile
->has_section_at_zero
))
5905 part_die
->has_pc_info
= 1;
5907 if (base_address_type
!= base_address_none
&& !cu
->header
.base_known
)
5909 gdb_assert (part_die
->tag
== DW_TAG_compile_unit
);
5910 cu
->header
.base_known
= 1;
5911 cu
->header
.base_address
= base_address
;
5917 /* Find a cached partial DIE at OFFSET in CU. */
5919 static struct partial_die_info
*
5920 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5922 struct partial_die_info
*lookup_die
= NULL
;
5923 struct partial_die_info part_die
;
5925 part_die
.offset
= offset
;
5926 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5931 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5933 static struct partial_die_info
*
5934 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5936 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5937 struct partial_die_info
*pd
= NULL
;
5939 if (offset
>= cu
->header
.offset
5940 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5942 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5947 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5949 if (per_cu
->cu
== NULL
)
5951 load_comp_unit (per_cu
, cu
->objfile
);
5952 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5953 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5956 per_cu
->cu
->last_used
= 0;
5957 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5959 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5961 struct cleanup
*back_to
;
5962 struct partial_die_info comp_unit_die
;
5963 struct abbrev_info
*abbrev
;
5964 unsigned int bytes_read
;
5967 per_cu
->load_all_dies
= 1;
5969 /* Re-read the DIEs. */
5970 back_to
= make_cleanup (null_cleanup
, 0);
5971 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5973 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5974 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5976 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5977 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5978 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5979 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5981 if (comp_unit_die
.has_children
)
5982 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5983 do_cleanups (back_to
);
5985 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5989 internal_error (__FILE__
, __LINE__
,
5990 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5991 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5995 /* Adjust PART_DIE before generating a symbol for it. This function
5996 may set the is_external flag or change the DIE's name. */
5999 fixup_partial_die (struct partial_die_info
*part_die
,
6000 struct dwarf2_cu
*cu
)
6002 /* If we found a reference attribute and the DIE has no name, try
6003 to find a name in the referred to DIE. */
6005 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6007 struct partial_die_info
*spec_die
;
6009 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6011 fixup_partial_die (spec_die
, cu
);
6015 part_die
->name
= spec_die
->name
;
6017 /* Copy DW_AT_external attribute if it is set. */
6018 if (spec_die
->is_external
)
6019 part_die
->is_external
= spec_die
->is_external
;
6023 /* Set default names for some unnamed DIEs. */
6024 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6025 || part_die
->tag
== DW_TAG_class_type
))
6026 part_die
->name
= "(anonymous class)";
6028 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6029 part_die
->name
= "(anonymous namespace)";
6031 if (part_die
->tag
== DW_TAG_structure_type
6032 || part_die
->tag
== DW_TAG_class_type
6033 || part_die
->tag
== DW_TAG_union_type
)
6034 guess_structure_name (part_die
, cu
);
6037 /* Read the die from the .debug_info section buffer. Set DIEP to
6038 point to a newly allocated die with its information, except for its
6039 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6040 whether the die has children or not. */
6043 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
6044 struct dwarf2_cu
*cu
, int *has_children
)
6046 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6047 struct abbrev_info
*abbrev
;
6048 struct die_info
*die
;
6050 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
6051 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6052 info_ptr
+= bytes_read
;
6060 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6063 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6065 bfd_get_filename (abfd
));
6067 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6068 die
->offset
= offset
;
6069 die
->tag
= abbrev
->tag
;
6070 die
->abbrev
= abbrev_number
;
6072 die
->num_attrs
= abbrev
->num_attrs
;
6074 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6076 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6077 abfd
, info_ptr
, cu
);
6079 /* If this attribute is an absolute reference to a different
6080 compilation unit, make sure that compilation unit is loaded
6082 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
6083 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
6084 || (DW_ADDR (&die
->attrs
[i
])
6085 >= cu
->header
.offset
+ cu
->header
.length
)))
6087 struct dwarf2_per_cu_data
*per_cu
;
6088 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
6091 /* Mark the dependence relation so that we don't flush PER_CU
6093 dwarf2_add_dependence (cu
, per_cu
);
6095 /* If it's already on the queue, we have nothing to do. */
6099 /* If the compilation unit is already loaded, just mark it as
6101 if (per_cu
->cu
!= NULL
)
6103 per_cu
->cu
->last_used
= 0;
6107 /* Add it to the queue. */
6108 queue_comp_unit (per_cu
);
6113 *has_children
= abbrev
->has_children
;
6117 /* Read an attribute value described by an attribute form. */
6120 read_attribute_value (struct attribute
*attr
, unsigned form
,
6121 bfd
*abfd
, gdb_byte
*info_ptr
,
6122 struct dwarf2_cu
*cu
)
6124 struct comp_unit_head
*cu_header
= &cu
->header
;
6125 unsigned int bytes_read
;
6126 struct dwarf_block
*blk
;
6132 case DW_FORM_ref_addr
:
6133 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6134 info_ptr
+= bytes_read
;
6136 case DW_FORM_block2
:
6137 blk
= dwarf_alloc_block (cu
);
6138 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6140 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6141 info_ptr
+= blk
->size
;
6142 DW_BLOCK (attr
) = blk
;
6144 case DW_FORM_block4
:
6145 blk
= dwarf_alloc_block (cu
);
6146 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6148 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6149 info_ptr
+= blk
->size
;
6150 DW_BLOCK (attr
) = blk
;
6153 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6157 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6161 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6164 case DW_FORM_string
:
6165 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6166 info_ptr
+= bytes_read
;
6169 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6171 info_ptr
+= bytes_read
;
6174 blk
= dwarf_alloc_block (cu
);
6175 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6176 info_ptr
+= bytes_read
;
6177 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6178 info_ptr
+= blk
->size
;
6179 DW_BLOCK (attr
) = blk
;
6181 case DW_FORM_block1
:
6182 blk
= dwarf_alloc_block (cu
);
6183 blk
->size
= read_1_byte (abfd
, info_ptr
);
6185 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6186 info_ptr
+= blk
->size
;
6187 DW_BLOCK (attr
) = blk
;
6190 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6194 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6198 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6199 info_ptr
+= bytes_read
;
6202 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6203 info_ptr
+= bytes_read
;
6206 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6210 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6214 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6218 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6221 case DW_FORM_ref_udata
:
6222 DW_ADDR (attr
) = (cu
->header
.offset
6223 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6224 info_ptr
+= bytes_read
;
6226 case DW_FORM_indirect
:
6227 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6228 info_ptr
+= bytes_read
;
6229 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6232 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6233 dwarf_form_name (form
),
6234 bfd_get_filename (abfd
));
6237 /* We have seen instances where the compiler tried to emit a byte
6238 size attribute of -1 which ended up being encoded as an unsigned
6239 0xffffffff. Although 0xffffffff is technically a valid size value,
6240 an object of this size seems pretty unlikely so we can relatively
6241 safely treat these cases as if the size attribute was invalid and
6242 treat them as zero by default. */
6243 if (attr
->name
== DW_AT_byte_size
6244 && form
== DW_FORM_data4
6245 && DW_UNSND (attr
) >= 0xffffffff)
6248 (&symfile_complaints
,
6249 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
6251 DW_UNSND (attr
) = 0;
6257 /* Read an attribute described by an abbreviated attribute. */
6260 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6261 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6263 attr
->name
= abbrev
->name
;
6264 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6267 /* read dwarf information from a buffer */
6270 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6272 return bfd_get_8 (abfd
, buf
);
6276 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6278 return bfd_get_signed_8 (abfd
, buf
);
6282 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6284 return bfd_get_16 (abfd
, buf
);
6288 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6290 return bfd_get_signed_16 (abfd
, buf
);
6294 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6296 return bfd_get_32 (abfd
, buf
);
6300 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6302 return bfd_get_signed_32 (abfd
, buf
);
6305 static unsigned long
6306 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6308 return bfd_get_64 (abfd
, buf
);
6312 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6313 unsigned int *bytes_read
)
6315 struct comp_unit_head
*cu_header
= &cu
->header
;
6316 CORE_ADDR retval
= 0;
6318 if (cu_header
->signed_addr_p
)
6320 switch (cu_header
->addr_size
)
6323 retval
= bfd_get_signed_16 (abfd
, buf
);
6326 retval
= bfd_get_signed_32 (abfd
, buf
);
6329 retval
= bfd_get_signed_64 (abfd
, buf
);
6332 internal_error (__FILE__
, __LINE__
,
6333 _("read_address: bad switch, signed [in module %s]"),
6334 bfd_get_filename (abfd
));
6339 switch (cu_header
->addr_size
)
6342 retval
= bfd_get_16 (abfd
, buf
);
6345 retval
= bfd_get_32 (abfd
, buf
);
6348 retval
= bfd_get_64 (abfd
, buf
);
6351 internal_error (__FILE__
, __LINE__
,
6352 _("read_address: bad switch, unsigned [in module %s]"),
6353 bfd_get_filename (abfd
));
6357 *bytes_read
= cu_header
->addr_size
;
6361 /* Read the initial length from a section. The (draft) DWARF 3
6362 specification allows the initial length to take up either 4 bytes
6363 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6364 bytes describe the length and all offsets will be 8 bytes in length
6367 An older, non-standard 64-bit format is also handled by this
6368 function. The older format in question stores the initial length
6369 as an 8-byte quantity without an escape value. Lengths greater
6370 than 2^32 aren't very common which means that the initial 4 bytes
6371 is almost always zero. Since a length value of zero doesn't make
6372 sense for the 32-bit format, this initial zero can be considered to
6373 be an escape value which indicates the presence of the older 64-bit
6374 format. As written, the code can't detect (old format) lengths
6375 greater than 4GB. If it becomes necessary to handle lengths
6376 somewhat larger than 4GB, we could allow other small values (such
6377 as the non-sensical values of 1, 2, and 3) to also be used as
6378 escape values indicating the presence of the old format.
6380 The value returned via bytes_read should be used to increment the
6381 relevant pointer after calling read_initial_length().
6383 As a side effect, this function sets the fields initial_length_size
6384 and offset_size in cu_header to the values appropriate for the
6385 length field. (The format of the initial length field determines
6386 the width of file offsets to be fetched later with read_offset().)
6388 [ Note: read_initial_length() and read_offset() are based on the
6389 document entitled "DWARF Debugging Information Format", revision
6390 3, draft 8, dated November 19, 2001. This document was obtained
6393 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6395 This document is only a draft and is subject to change. (So beware.)
6397 Details regarding the older, non-standard 64-bit format were
6398 determined empirically by examining 64-bit ELF files produced by
6399 the SGI toolchain on an IRIX 6.5 machine.
6401 - Kevin, July 16, 2002
6405 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6406 unsigned int *bytes_read
)
6408 LONGEST length
= bfd_get_32 (abfd
, buf
);
6410 if (length
== 0xffffffff)
6412 length
= bfd_get_64 (abfd
, buf
+ 4);
6415 else if (length
== 0)
6417 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6418 length
= bfd_get_64 (abfd
, buf
);
6428 gdb_assert (cu_header
->initial_length_size
== 0
6429 || cu_header
->initial_length_size
== 4
6430 || cu_header
->initial_length_size
== 8
6431 || cu_header
->initial_length_size
== 12);
6433 if (cu_header
->initial_length_size
!= 0
6434 && cu_header
->initial_length_size
!= *bytes_read
)
6435 complaint (&symfile_complaints
,
6436 _("intermixed 32-bit and 64-bit DWARF sections"));
6438 cu_header
->initial_length_size
= *bytes_read
;
6439 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6445 /* Read an offset from the data stream. The size of the offset is
6446 given by cu_header->offset_size. */
6449 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6450 unsigned int *bytes_read
)
6454 switch (cu_header
->offset_size
)
6457 retval
= bfd_get_32 (abfd
, buf
);
6461 retval
= bfd_get_64 (abfd
, buf
);
6465 internal_error (__FILE__
, __LINE__
,
6466 _("read_offset: bad switch [in module %s]"),
6467 bfd_get_filename (abfd
));
6474 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6476 /* If the size of a host char is 8 bits, we can return a pointer
6477 to the buffer, otherwise we have to copy the data to a buffer
6478 allocated on the temporary obstack. */
6479 gdb_assert (HOST_CHAR_BIT
== 8);
6484 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6486 /* If the size of a host char is 8 bits, we can return a pointer
6487 to the string, otherwise we have to copy the string to a buffer
6488 allocated on the temporary obstack. */
6489 gdb_assert (HOST_CHAR_BIT
== 8);
6492 *bytes_read_ptr
= 1;
6495 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6496 return (char *) buf
;
6500 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6501 const struct comp_unit_head
*cu_header
,
6502 unsigned int *bytes_read_ptr
)
6504 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6507 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6509 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6510 bfd_get_filename (abfd
));
6513 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6515 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6516 bfd_get_filename (abfd
));
6519 gdb_assert (HOST_CHAR_BIT
== 8);
6520 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6522 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6525 static unsigned long
6526 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6528 unsigned long result
;
6529 unsigned int num_read
;
6539 byte
= bfd_get_8 (abfd
, buf
);
6542 result
|= ((unsigned long)(byte
& 127) << shift
);
6543 if ((byte
& 128) == 0)
6549 *bytes_read_ptr
= num_read
;
6554 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6557 int i
, shift
, num_read
;
6566 byte
= bfd_get_8 (abfd
, buf
);
6569 result
|= ((long)(byte
& 127) << shift
);
6571 if ((byte
& 128) == 0)
6576 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6577 result
|= -(((long)1) << shift
);
6578 *bytes_read_ptr
= num_read
;
6582 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6585 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6591 byte
= bfd_get_8 (abfd
, buf
);
6593 if ((byte
& 128) == 0)
6599 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6605 cu
->language
= language_c
;
6607 case DW_LANG_C_plus_plus
:
6608 cu
->language
= language_cplus
;
6610 case DW_LANG_Fortran77
:
6611 case DW_LANG_Fortran90
:
6612 case DW_LANG_Fortran95
:
6613 cu
->language
= language_fortran
;
6615 case DW_LANG_Mips_Assembler
:
6616 cu
->language
= language_asm
;
6619 cu
->language
= language_java
;
6623 cu
->language
= language_ada
;
6625 case DW_LANG_Modula2
:
6626 cu
->language
= language_m2
;
6628 case DW_LANG_Pascal83
:
6629 cu
->language
= language_pascal
;
6632 cu
->language
= language_objc
;
6634 case DW_LANG_Cobol74
:
6635 case DW_LANG_Cobol85
:
6637 cu
->language
= language_minimal
;
6640 cu
->language_defn
= language_def (cu
->language
);
6643 /* Return the named attribute or NULL if not there. */
6645 static struct attribute
*
6646 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6649 struct attribute
*spec
= NULL
;
6651 for (i
= 0; i
< die
->num_attrs
; ++i
)
6653 if (die
->attrs
[i
].name
== name
)
6654 return &die
->attrs
[i
];
6655 if (die
->attrs
[i
].name
== DW_AT_specification
6656 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6657 spec
= &die
->attrs
[i
];
6661 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6666 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6667 and holds a non-zero value. This function should only be used for
6668 DW_FORM_flag attributes. */
6671 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6673 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6675 return (attr
&& DW_UNSND (attr
));
6679 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6681 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6682 which value is non-zero. However, we have to be careful with
6683 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6684 (via dwarf2_flag_true_p) follows this attribute. So we may
6685 end up accidently finding a declaration attribute that belongs
6686 to a different DIE referenced by the specification attribute,
6687 even though the given DIE does not have a declaration attribute. */
6688 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6689 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6692 /* Return the die giving the specification for DIE, if there is
6695 static struct die_info
*
6696 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6698 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6700 if (spec_attr
== NULL
)
6703 return follow_die_ref (die
, spec_attr
, cu
);
6706 /* Free the line_header structure *LH, and any arrays and strings it
6709 free_line_header (struct line_header
*lh
)
6711 if (lh
->standard_opcode_lengths
)
6712 xfree (lh
->standard_opcode_lengths
);
6714 /* Remember that all the lh->file_names[i].name pointers are
6715 pointers into debug_line_buffer, and don't need to be freed. */
6717 xfree (lh
->file_names
);
6719 /* Similarly for the include directory names. */
6720 if (lh
->include_dirs
)
6721 xfree (lh
->include_dirs
);
6727 /* Add an entry to LH's include directory table. */
6729 add_include_dir (struct line_header
*lh
, char *include_dir
)
6731 /* Grow the array if necessary. */
6732 if (lh
->include_dirs_size
== 0)
6734 lh
->include_dirs_size
= 1; /* for testing */
6735 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6736 * sizeof (*lh
->include_dirs
));
6738 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6740 lh
->include_dirs_size
*= 2;
6741 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6742 (lh
->include_dirs_size
6743 * sizeof (*lh
->include_dirs
)));
6746 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6750 /* Add an entry to LH's file name table. */
6752 add_file_name (struct line_header
*lh
,
6754 unsigned int dir_index
,
6755 unsigned int mod_time
,
6756 unsigned int length
)
6758 struct file_entry
*fe
;
6760 /* Grow the array if necessary. */
6761 if (lh
->file_names_size
== 0)
6763 lh
->file_names_size
= 1; /* for testing */
6764 lh
->file_names
= xmalloc (lh
->file_names_size
6765 * sizeof (*lh
->file_names
));
6767 else if (lh
->num_file_names
>= lh
->file_names_size
)
6769 lh
->file_names_size
*= 2;
6770 lh
->file_names
= xrealloc (lh
->file_names
,
6771 (lh
->file_names_size
6772 * sizeof (*lh
->file_names
)));
6775 fe
= &lh
->file_names
[lh
->num_file_names
++];
6777 fe
->dir_index
= dir_index
;
6778 fe
->mod_time
= mod_time
;
6779 fe
->length
= length
;
6785 /* Read the statement program header starting at OFFSET in
6786 .debug_line, according to the endianness of ABFD. Return a pointer
6787 to a struct line_header, allocated using xmalloc.
6789 NOTE: the strings in the include directory and file name tables of
6790 the returned object point into debug_line_buffer, and must not be
6792 static struct line_header
*
6793 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6794 struct dwarf2_cu
*cu
)
6796 struct cleanup
*back_to
;
6797 struct line_header
*lh
;
6799 unsigned int bytes_read
;
6801 char *cur_dir
, *cur_file
;
6803 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6805 complaint (&symfile_complaints
, _("missing .debug_line section"));
6809 /* Make sure that at least there's room for the total_length field.
6810 That could be 12 bytes long, but we're just going to fudge that. */
6811 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6813 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6817 lh
= xmalloc (sizeof (*lh
));
6818 memset (lh
, 0, sizeof (*lh
));
6819 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6822 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6824 /* Read in the header. */
6826 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6827 line_ptr
+= bytes_read
;
6828 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6829 + dwarf2_per_objfile
->line_size
))
6831 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6834 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6835 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6837 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6838 line_ptr
+= bytes_read
;
6839 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6841 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6843 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6845 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6847 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6849 lh
->standard_opcode_lengths
6850 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6852 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6853 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6855 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6859 /* Read directory table. */
6860 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6862 line_ptr
+= bytes_read
;
6863 add_include_dir (lh
, cur_dir
);
6865 line_ptr
+= bytes_read
;
6867 /* Read file name table. */
6868 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6870 unsigned int dir_index
, mod_time
, length
;
6872 line_ptr
+= bytes_read
;
6873 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6874 line_ptr
+= bytes_read
;
6875 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6876 line_ptr
+= bytes_read
;
6877 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6878 line_ptr
+= bytes_read
;
6880 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6882 line_ptr
+= bytes_read
;
6883 lh
->statement_program_start
= line_ptr
;
6885 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6886 + dwarf2_per_objfile
->line_size
))
6887 complaint (&symfile_complaints
,
6888 _("line number info header doesn't fit in `.debug_line' section"));
6890 discard_cleanups (back_to
);
6894 /* This function exists to work around a bug in certain compilers
6895 (particularly GCC 2.95), in which the first line number marker of a
6896 function does not show up until after the prologue, right before
6897 the second line number marker. This function shifts ADDRESS down
6898 to the beginning of the function if necessary, and is called on
6899 addresses passed to record_line. */
6902 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6904 struct function_range
*fn
;
6906 /* Find the function_range containing address. */
6911 cu
->cached_fn
= cu
->first_fn
;
6915 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6921 while (fn
&& fn
!= cu
->cached_fn
)
6922 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6932 if (address
!= fn
->lowpc
)
6933 complaint (&symfile_complaints
,
6934 _("misplaced first line number at 0x%lx for '%s'"),
6935 (unsigned long) address
, fn
->name
);
6940 /* Decode the Line Number Program (LNP) for the given line_header
6941 structure and CU. The actual information extracted and the type
6942 of structures created from the LNP depends on the value of PST.
6944 1. If PST is NULL, then this procedure uses the data from the program
6945 to create all necessary symbol tables, and their linetables.
6946 The compilation directory of the file is passed in COMP_DIR,
6947 and must not be NULL.
6949 2. If PST is not NULL, this procedure reads the program to determine
6950 the list of files included by the unit represented by PST, and
6951 builds all the associated partial symbol tables. In this case,
6952 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6953 is not used to compute the full name of the symtab, and therefore
6954 omitting it when building the partial symtab does not introduce
6955 the potential for inconsistency - a partial symtab and its associated
6956 symbtab having a different fullname -). */
6959 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6960 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6962 gdb_byte
*line_ptr
, *extended_end
;
6964 unsigned int bytes_read
, extended_len
;
6965 unsigned char op_code
, extended_op
, adj_opcode
;
6967 struct objfile
*objfile
= cu
->objfile
;
6968 const int decode_for_pst_p
= (pst
!= NULL
);
6969 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6971 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6973 line_ptr
= lh
->statement_program_start
;
6974 line_end
= lh
->statement_program_end
;
6976 /* Read the statement sequences until there's nothing left. */
6977 while (line_ptr
< line_end
)
6979 /* state machine registers */
6980 CORE_ADDR address
= 0;
6981 unsigned int file
= 1;
6982 unsigned int line
= 1;
6983 unsigned int column
= 0;
6984 int is_stmt
= lh
->default_is_stmt
;
6985 int basic_block
= 0;
6986 int end_sequence
= 0;
6988 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6990 /* Start a subfile for the current file of the state machine. */
6991 /* lh->include_dirs and lh->file_names are 0-based, but the
6992 directory and file name numbers in the statement program
6994 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6998 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7000 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7003 /* Decode the table. */
7004 while (!end_sequence
)
7006 op_code
= read_1_byte (abfd
, line_ptr
);
7009 if (op_code
>= lh
->opcode_base
)
7011 /* Special operand. */
7012 adj_opcode
= op_code
- lh
->opcode_base
;
7013 address
+= (adj_opcode
/ lh
->line_range
)
7014 * lh
->minimum_instruction_length
;
7015 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7016 if (lh
->num_file_names
< file
)
7017 dwarf2_debug_line_missing_file_complaint ();
7020 lh
->file_names
[file
- 1].included_p
= 1;
7021 if (!decode_for_pst_p
)
7023 if (last_subfile
!= current_subfile
)
7026 record_line (last_subfile
, 0, address
);
7027 last_subfile
= current_subfile
;
7029 /* Append row to matrix using current values. */
7030 record_line (current_subfile
, line
,
7031 check_cu_functions (address
, cu
));
7036 else switch (op_code
)
7038 case DW_LNS_extended_op
:
7039 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7040 line_ptr
+= bytes_read
;
7041 extended_end
= line_ptr
+ extended_len
;
7042 extended_op
= read_1_byte (abfd
, line_ptr
);
7044 switch (extended_op
)
7046 case DW_LNE_end_sequence
:
7049 if (lh
->num_file_names
< file
)
7050 dwarf2_debug_line_missing_file_complaint ();
7053 lh
->file_names
[file
- 1].included_p
= 1;
7054 if (!decode_for_pst_p
)
7055 record_line (current_subfile
, 0, address
);
7058 case DW_LNE_set_address
:
7059 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7060 line_ptr
+= bytes_read
;
7061 address
+= baseaddr
;
7063 case DW_LNE_define_file
:
7066 unsigned int dir_index
, mod_time
, length
;
7068 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7069 line_ptr
+= bytes_read
;
7071 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7072 line_ptr
+= bytes_read
;
7074 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7075 line_ptr
+= bytes_read
;
7077 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7078 line_ptr
+= bytes_read
;
7079 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7083 complaint (&symfile_complaints
,
7084 _("mangled .debug_line section"));
7087 /* Make sure that we parsed the extended op correctly. If e.g.
7088 we expected a different address size than the producer used,
7089 we may have read the wrong number of bytes. */
7090 if (line_ptr
!= extended_end
)
7092 complaint (&symfile_complaints
,
7093 _("mangled .debug_line section"));
7098 if (lh
->num_file_names
< file
)
7099 dwarf2_debug_line_missing_file_complaint ();
7102 lh
->file_names
[file
- 1].included_p
= 1;
7103 if (!decode_for_pst_p
)
7105 if (last_subfile
!= current_subfile
)
7108 record_line (last_subfile
, 0, address
);
7109 last_subfile
= current_subfile
;
7111 record_line (current_subfile
, line
,
7112 check_cu_functions (address
, cu
));
7117 case DW_LNS_advance_pc
:
7118 address
+= lh
->minimum_instruction_length
7119 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7120 line_ptr
+= bytes_read
;
7122 case DW_LNS_advance_line
:
7123 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7124 line_ptr
+= bytes_read
;
7126 case DW_LNS_set_file
:
7128 /* The arrays lh->include_dirs and lh->file_names are
7129 0-based, but the directory and file name numbers in
7130 the statement program are 1-based. */
7131 struct file_entry
*fe
;
7134 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7135 line_ptr
+= bytes_read
;
7136 if (lh
->num_file_names
< file
)
7137 dwarf2_debug_line_missing_file_complaint ();
7140 fe
= &lh
->file_names
[file
- 1];
7142 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7143 if (!decode_for_pst_p
)
7145 last_subfile
= current_subfile
;
7146 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7151 case DW_LNS_set_column
:
7152 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7153 line_ptr
+= bytes_read
;
7155 case DW_LNS_negate_stmt
:
7156 is_stmt
= (!is_stmt
);
7158 case DW_LNS_set_basic_block
:
7161 /* Add to the address register of the state machine the
7162 address increment value corresponding to special opcode
7163 255. I.e., this value is scaled by the minimum
7164 instruction length since special opcode 255 would have
7165 scaled the the increment. */
7166 case DW_LNS_const_add_pc
:
7167 address
+= (lh
->minimum_instruction_length
7168 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7170 case DW_LNS_fixed_advance_pc
:
7171 address
+= read_2_bytes (abfd
, line_ptr
);
7176 /* Unknown standard opcode, ignore it. */
7179 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7181 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7182 line_ptr
+= bytes_read
;
7189 if (decode_for_pst_p
)
7193 /* Now that we're done scanning the Line Header Program, we can
7194 create the psymtab of each included file. */
7195 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7196 if (lh
->file_names
[file_index
].included_p
== 1)
7198 const struct file_entry fe
= lh
->file_names
[file_index
];
7199 char *include_name
= fe
.name
;
7200 char *dir_name
= NULL
;
7201 char *pst_filename
= pst
->filename
;
7204 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7206 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7208 include_name
= concat (dir_name
, SLASH_STRING
,
7209 include_name
, (char *)NULL
);
7210 make_cleanup (xfree
, include_name
);
7213 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7215 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7216 pst_filename
, (char *)NULL
);
7217 make_cleanup (xfree
, pst_filename
);
7220 if (strcmp (include_name
, pst_filename
) != 0)
7221 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7226 /* Make sure a symtab is created for every file, even files
7227 which contain only variables (i.e. no code with associated
7231 struct file_entry
*fe
;
7233 for (i
= 0; i
< lh
->num_file_names
; i
++)
7236 fe
= &lh
->file_names
[i
];
7238 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7239 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7241 /* Skip the main file; we don't need it, and it must be
7242 allocated last, so that it will show up before the
7243 non-primary symtabs in the objfile's symtab list. */
7244 if (current_subfile
== first_subfile
)
7247 if (current_subfile
->symtab
== NULL
)
7248 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7250 fe
->symtab
= current_subfile
->symtab
;
7255 /* Start a subfile for DWARF. FILENAME is the name of the file and
7256 DIRNAME the name of the source directory which contains FILENAME
7257 or NULL if not known. COMP_DIR is the compilation directory for the
7258 linetable's compilation unit or NULL if not known.
7259 This routine tries to keep line numbers from identical absolute and
7260 relative file names in a common subfile.
7262 Using the `list' example from the GDB testsuite, which resides in
7263 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7264 of /srcdir/list0.c yields the following debugging information for list0.c:
7266 DW_AT_name: /srcdir/list0.c
7267 DW_AT_comp_dir: /compdir
7268 files.files[0].name: list0.h
7269 files.files[0].dir: /srcdir
7270 files.files[1].name: list0.c
7271 files.files[1].dir: /srcdir
7273 The line number information for list0.c has to end up in a single
7274 subfile, so that `break /srcdir/list0.c:1' works as expected.
7275 start_subfile will ensure that this happens provided that we pass the
7276 concatenation of files.files[1].dir and files.files[1].name as the
7280 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7284 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7285 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7286 second argument to start_subfile. To be consistent, we do the
7287 same here. In order not to lose the line information directory,
7288 we concatenate it to the filename when it makes sense.
7289 Note that the Dwarf3 standard says (speaking of filenames in line
7290 information): ``The directory index is ignored for file names
7291 that represent full path names''. Thus ignoring dirname in the
7292 `else' branch below isn't an issue. */
7294 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7295 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7297 fullname
= filename
;
7299 start_subfile (fullname
, comp_dir
);
7301 if (fullname
!= filename
)
7306 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7307 struct dwarf2_cu
*cu
)
7309 struct objfile
*objfile
= cu
->objfile
;
7310 struct comp_unit_head
*cu_header
= &cu
->header
;
7312 /* NOTE drow/2003-01-30: There used to be a comment and some special
7313 code here to turn a symbol with DW_AT_external and a
7314 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7315 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7316 with some versions of binutils) where shared libraries could have
7317 relocations against symbols in their debug information - the
7318 minimal symbol would have the right address, but the debug info
7319 would not. It's no longer necessary, because we will explicitly
7320 apply relocations when we read in the debug information now. */
7322 /* A DW_AT_location attribute with no contents indicates that a
7323 variable has been optimized away. */
7324 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7326 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7330 /* Handle one degenerate form of location expression specially, to
7331 preserve GDB's previous behavior when section offsets are
7332 specified. If this is just a DW_OP_addr then mark this symbol
7335 if (attr_form_is_block (attr
)
7336 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7337 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7341 SYMBOL_VALUE_ADDRESS (sym
) =
7342 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7343 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7344 fixup_symbol_section (sym
, objfile
);
7345 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7346 SYMBOL_SECTION (sym
));
7350 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7351 expression evaluator, and use LOC_COMPUTED only when necessary
7352 (i.e. when the value of a register or memory location is
7353 referenced, or a thread-local block, etc.). Then again, it might
7354 not be worthwhile. I'm assuming that it isn't unless performance
7355 or memory numbers show me otherwise. */
7357 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7358 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7361 /* Given a pointer to a DWARF information entry, figure out if we need
7362 to make a symbol table entry for it, and if so, create a new entry
7363 and return a pointer to it.
7364 If TYPE is NULL, determine symbol type from the die, otherwise
7365 used the passed type. */
7367 static struct symbol
*
7368 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7370 struct objfile
*objfile
= cu
->objfile
;
7371 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7372 struct symbol
*sym
= NULL
;
7374 struct attribute
*attr
= NULL
;
7375 struct attribute
*attr2
= NULL
;
7378 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7380 if (die
->tag
!= DW_TAG_namespace
)
7381 name
= dwarf2_linkage_name (die
, cu
);
7383 name
= TYPE_NAME (type
);
7387 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7388 sizeof (struct symbol
));
7389 OBJSTAT (objfile
, n_syms
++);
7390 memset (sym
, 0, sizeof (struct symbol
));
7392 /* Cache this symbol's name and the name's demangled form (if any). */
7393 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7394 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7396 /* Default assumptions.
7397 Use the passed type or decode it from the die. */
7398 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7399 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7401 SYMBOL_TYPE (sym
) = type
;
7403 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7404 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7407 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7410 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7413 int file_index
= DW_UNSND (attr
);
7414 if (cu
->line_header
== NULL
7415 || file_index
> cu
->line_header
->num_file_names
)
7416 complaint (&symfile_complaints
,
7417 _("file index out of range"));
7418 else if (file_index
> 0)
7420 struct file_entry
*fe
;
7421 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7422 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7429 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7432 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7434 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7436 case DW_TAG_subprogram
:
7437 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7439 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7440 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7441 if ((attr2
&& (DW_UNSND (attr2
) != 0))
7442 || cu
->language
== language_ada
)
7444 /* Subprograms marked external are stored as a global symbol.
7445 Ada subprograms, whether marked external or not, are always
7446 stored as a global symbol, because we want to be able to
7447 access them globally. For instance, we want to be able
7448 to break on a nested subprogram without having to
7449 specify the context. */
7450 add_symbol_to_list (sym
, &global_symbols
);
7454 add_symbol_to_list (sym
, cu
->list_in_scope
);
7457 case DW_TAG_variable
:
7458 /* Compilation with minimal debug info may result in variables
7459 with missing type entries. Change the misleading `void' type
7460 to something sensible. */
7461 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7463 = builtin_type (gdbarch
)->nodebug_data_symbol
;
7465 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7468 dwarf2_const_value (attr
, sym
, cu
);
7469 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7470 if (attr2
&& (DW_UNSND (attr2
) != 0))
7471 add_symbol_to_list (sym
, &global_symbols
);
7473 add_symbol_to_list (sym
, cu
->list_in_scope
);
7476 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7479 var_decode_location (attr
, sym
, cu
);
7480 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7481 if (attr2
&& (DW_UNSND (attr2
) != 0))
7482 add_symbol_to_list (sym
, &global_symbols
);
7484 add_symbol_to_list (sym
, cu
->list_in_scope
);
7488 /* We do not know the address of this symbol.
7489 If it is an external symbol and we have type information
7490 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7491 The address of the variable will then be determined from
7492 the minimal symbol table whenever the variable is
7494 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7495 if (attr2
&& (DW_UNSND (attr2
) != 0)
7496 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7498 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7499 add_symbol_to_list (sym
, &global_symbols
);
7503 case DW_TAG_formal_parameter
:
7504 SYMBOL_IS_ARGUMENT (sym
) = 1;
7505 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7508 var_decode_location (attr
, sym
, cu
);
7510 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7513 dwarf2_const_value (attr
, sym
, cu
);
7515 add_symbol_to_list (sym
, cu
->list_in_scope
);
7517 case DW_TAG_unspecified_parameters
:
7518 /* From varargs functions; gdb doesn't seem to have any
7519 interest in this information, so just ignore it for now.
7522 case DW_TAG_class_type
:
7523 case DW_TAG_interface_type
:
7524 case DW_TAG_structure_type
:
7525 case DW_TAG_union_type
:
7526 case DW_TAG_set_type
:
7527 case DW_TAG_enumeration_type
:
7528 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7529 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7531 /* Make sure that the symbol includes appropriate enclosing
7532 classes/namespaces in its name. These are calculated in
7533 read_structure_type, and the correct name is saved in
7536 if (cu
->language
== language_cplus
7537 || cu
->language
== language_java
)
7539 struct type
*type
= SYMBOL_TYPE (sym
);
7541 if (TYPE_TAG_NAME (type
) != NULL
)
7543 /* FIXME: carlton/2003-11-10: Should this use
7544 SYMBOL_SET_NAMES instead? (The same problem also
7545 arises further down in this function.) */
7546 /* The type's name is already allocated along with
7547 this objfile, so we don't need to duplicate it
7549 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7554 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7555 really ever be static objects: otherwise, if you try
7556 to, say, break of a class's method and you're in a file
7557 which doesn't mention that class, it won't work unless
7558 the check for all static symbols in lookup_symbol_aux
7559 saves you. See the OtherFileClass tests in
7560 gdb.c++/namespace.exp. */
7562 struct pending
**list_to_add
;
7564 list_to_add
= (cu
->list_in_scope
== &file_symbols
7565 && (cu
->language
== language_cplus
7566 || cu
->language
== language_java
)
7567 ? &global_symbols
: cu
->list_in_scope
);
7569 add_symbol_to_list (sym
, list_to_add
);
7571 /* The semantics of C++ state that "struct foo { ... }" also
7572 defines a typedef for "foo". A Java class declaration also
7573 defines a typedef for the class. */
7574 if (cu
->language
== language_cplus
7575 || cu
->language
== language_java
7576 || cu
->language
== language_ada
)
7578 /* The symbol's name is already allocated along with
7579 this objfile, so we don't need to duplicate it for
7581 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7582 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7586 case DW_TAG_typedef
:
7587 if (processing_has_namespace_info
7588 && processing_current_prefix
[0] != '\0')
7590 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7591 processing_current_prefix
,
7594 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7595 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7596 add_symbol_to_list (sym
, cu
->list_in_scope
);
7598 case DW_TAG_base_type
:
7599 case DW_TAG_subrange_type
:
7600 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7601 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7602 add_symbol_to_list (sym
, cu
->list_in_scope
);
7604 case DW_TAG_enumerator
:
7605 if (processing_has_namespace_info
7606 && processing_current_prefix
[0] != '\0')
7608 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7609 processing_current_prefix
,
7612 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7615 dwarf2_const_value (attr
, sym
, cu
);
7618 /* NOTE: carlton/2003-11-10: See comment above in the
7619 DW_TAG_class_type, etc. block. */
7621 struct pending
**list_to_add
;
7623 list_to_add
= (cu
->list_in_scope
== &file_symbols
7624 && (cu
->language
== language_cplus
7625 || cu
->language
== language_java
)
7626 ? &global_symbols
: cu
->list_in_scope
);
7628 add_symbol_to_list (sym
, list_to_add
);
7631 case DW_TAG_namespace
:
7632 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7633 add_symbol_to_list (sym
, &global_symbols
);
7636 /* Not a tag we recognize. Hopefully we aren't processing
7637 trash data, but since we must specifically ignore things
7638 we don't recognize, there is nothing else we should do at
7640 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7641 dwarf_tag_name (die
->tag
));
7648 /* Copy constant value from an attribute to a symbol. */
7651 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7652 struct dwarf2_cu
*cu
)
7654 struct objfile
*objfile
= cu
->objfile
;
7655 struct comp_unit_head
*cu_header
= &cu
->header
;
7656 struct dwarf_block
*blk
;
7661 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7662 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7663 cu_header
->addr_size
,
7664 TYPE_LENGTH (SYMBOL_TYPE
7666 SYMBOL_VALUE_BYTES (sym
) =
7667 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7668 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7669 it's body - store_unsigned_integer. */
7670 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7672 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7675 /* DW_STRING is already allocated on the obstack, point directly
7677 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
7678 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7680 case DW_FORM_block1
:
7681 case DW_FORM_block2
:
7682 case DW_FORM_block4
:
7684 blk
= DW_BLOCK (attr
);
7685 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7686 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7688 TYPE_LENGTH (SYMBOL_TYPE
7690 SYMBOL_VALUE_BYTES (sym
) =
7691 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7692 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7693 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7696 /* The DW_AT_const_value attributes are supposed to carry the
7697 symbol's value "represented as it would be on the target
7698 architecture." By the time we get here, it's already been
7699 converted to host endianness, so we just need to sign- or
7700 zero-extend it as appropriate. */
7702 dwarf2_const_value_data (attr
, sym
, 8);
7705 dwarf2_const_value_data (attr
, sym
, 16);
7708 dwarf2_const_value_data (attr
, sym
, 32);
7711 dwarf2_const_value_data (attr
, sym
, 64);
7715 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7716 SYMBOL_CLASS (sym
) = LOC_CONST
;
7720 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7721 SYMBOL_CLASS (sym
) = LOC_CONST
;
7725 complaint (&symfile_complaints
,
7726 _("unsupported const value attribute form: '%s'"),
7727 dwarf_form_name (attr
->form
));
7728 SYMBOL_VALUE (sym
) = 0;
7729 SYMBOL_CLASS (sym
) = LOC_CONST
;
7735 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7736 or zero-extend it as appropriate for the symbol's type. */
7738 dwarf2_const_value_data (struct attribute
*attr
,
7742 LONGEST l
= DW_UNSND (attr
);
7744 if (bits
< sizeof (l
) * 8)
7746 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7747 l
&= ((LONGEST
) 1 << bits
) - 1;
7749 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7752 SYMBOL_VALUE (sym
) = l
;
7753 SYMBOL_CLASS (sym
) = LOC_CONST
;
7757 /* Return the type of the die in question using its DW_AT_type attribute. */
7759 static struct type
*
7760 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7762 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7764 struct attribute
*type_attr
;
7765 struct die_info
*type_die
;
7767 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7770 /* A missing DW_AT_type represents a void type. */
7771 return builtin_type (gdbarch
)->builtin_void
;
7774 type_die
= follow_die_ref (die
, type_attr
, cu
);
7776 type
= tag_type_to_type (type_die
, cu
);
7779 dump_die (type_die
);
7780 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7786 /* Return the containing type of the die in question using its
7787 DW_AT_containing_type attribute. */
7789 static struct type
*
7790 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7792 struct type
*type
= NULL
;
7793 struct attribute
*type_attr
;
7794 struct die_info
*type_die
= NULL
;
7796 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7799 type_die
= follow_die_ref (die
, type_attr
, cu
);
7800 type
= tag_type_to_type (type_die
, cu
);
7805 dump_die (type_die
);
7806 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7812 static struct type
*
7813 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7815 struct type
*this_type
;
7817 this_type
= read_type_die (die
, cu
);
7821 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7827 static struct type
*
7828 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7831 const char *old_prefix
;
7832 struct cleanup
*back_to
;
7833 struct type
*this_type
;
7835 this_type
= get_die_type (die
, cu
);
7839 prefix
= determine_prefix (die
, cu
);
7840 old_prefix
= processing_current_prefix
;
7841 back_to
= make_cleanup (xfree
, prefix
);
7842 processing_current_prefix
= prefix
;
7846 case DW_TAG_class_type
:
7847 case DW_TAG_interface_type
:
7848 case DW_TAG_structure_type
:
7849 case DW_TAG_union_type
:
7850 this_type
= read_structure_type (die
, cu
);
7852 case DW_TAG_enumeration_type
:
7853 this_type
= read_enumeration_type (die
, cu
);
7855 case DW_TAG_subprogram
:
7856 case DW_TAG_subroutine_type
:
7857 this_type
= read_subroutine_type (die
, cu
);
7859 case DW_TAG_array_type
:
7860 this_type
= read_array_type (die
, cu
);
7862 case DW_TAG_set_type
:
7863 this_type
= read_set_type (die
, cu
);
7865 case DW_TAG_pointer_type
:
7866 this_type
= read_tag_pointer_type (die
, cu
);
7868 case DW_TAG_ptr_to_member_type
:
7869 this_type
= read_tag_ptr_to_member_type (die
, cu
);
7871 case DW_TAG_reference_type
:
7872 this_type
= read_tag_reference_type (die
, cu
);
7874 case DW_TAG_const_type
:
7875 this_type
= read_tag_const_type (die
, cu
);
7877 case DW_TAG_volatile_type
:
7878 this_type
= read_tag_volatile_type (die
, cu
);
7880 case DW_TAG_string_type
:
7881 this_type
= read_tag_string_type (die
, cu
);
7883 case DW_TAG_typedef
:
7884 this_type
= read_typedef (die
, cu
);
7886 case DW_TAG_subrange_type
:
7887 this_type
= read_subrange_type (die
, cu
);
7889 case DW_TAG_base_type
:
7890 this_type
= read_base_type (die
, cu
);
7892 case DW_TAG_unspecified_type
:
7893 this_type
= read_unspecified_type (die
, cu
);
7896 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7897 dwarf_tag_name (die
->tag
));
7901 processing_current_prefix
= old_prefix
;
7902 do_cleanups (back_to
);
7906 /* Return the name of the namespace/class that DIE is defined within,
7907 or "" if we can't tell. The caller should xfree the result. */
7909 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7910 therein) for an example of how to use this function to deal with
7911 DW_AT_specification. */
7914 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7916 struct die_info
*parent
;
7918 if (cu
->language
!= language_cplus
7919 && cu
->language
!= language_java
)
7922 parent
= die
->parent
;
7926 return xstrdup ("");
7930 switch (parent
->tag
) {
7931 case DW_TAG_namespace
:
7933 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7934 before doing this check? */
7935 struct type
*parent_type
= get_die_type (parent
, cu
);
7936 if (parent_type
!= NULL
&& TYPE_TAG_NAME (parent_type
) != NULL
)
7938 return xstrdup (TYPE_TAG_NAME (parent_type
));
7943 char *parent_prefix
= determine_prefix (parent
, cu
);
7944 char *retval
= typename_concat (NULL
, parent_prefix
,
7945 namespace_name (parent
, &dummy
,
7948 xfree (parent_prefix
);
7953 case DW_TAG_class_type
:
7954 case DW_TAG_interface_type
:
7955 case DW_TAG_structure_type
:
7957 struct type
*parent_type
= get_die_type (parent
, cu
);
7958 if (parent_type
!= NULL
&& TYPE_TAG_NAME (parent_type
) != NULL
)
7960 return xstrdup (TYPE_TAG_NAME (parent_type
));
7964 const char *old_prefix
= processing_current_prefix
;
7965 char *new_prefix
= determine_prefix (parent
, cu
);
7968 processing_current_prefix
= new_prefix
;
7969 retval
= determine_class_name (parent
, cu
);
7970 processing_current_prefix
= old_prefix
;
7977 return determine_prefix (parent
, cu
);
7982 /* Return a newly-allocated string formed by concatenating PREFIX and
7983 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7984 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7985 perform an obconcat, otherwise allocate storage for the result. The CU argument
7986 is used to determine the language and hence, the appropriate separator. */
7988 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7991 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7992 struct dwarf2_cu
*cu
)
7996 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7998 else if (cu
->language
== language_java
)
8005 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8010 strcpy (retval
, prefix
);
8011 strcat (retval
, sep
);
8014 strcat (retval
, suffix
);
8020 /* We have an obstack. */
8021 return obconcat (obs
, prefix
, sep
, suffix
);
8025 /* Return sibling of die, NULL if no sibling. */
8027 static struct die_info
*
8028 sibling_die (struct die_info
*die
)
8030 return die
->sibling
;
8033 /* Get linkage name of a die, return NULL if not found. */
8036 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8038 struct attribute
*attr
;
8040 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8041 if (attr
&& DW_STRING (attr
))
8042 return DW_STRING (attr
);
8043 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8044 if (attr
&& DW_STRING (attr
))
8045 return DW_STRING (attr
);
8049 /* Get name of a die, return NULL if not found. */
8052 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8054 struct attribute
*attr
;
8056 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8057 if (attr
&& DW_STRING (attr
))
8058 return DW_STRING (attr
);
8062 /* Return the die that this die in an extension of, or NULL if there
8065 static struct die_info
*
8066 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
8068 struct attribute
*attr
;
8070 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
8074 return follow_die_ref (die
, attr
, cu
);
8077 /* Convert a DIE tag into its string name. */
8080 dwarf_tag_name (unsigned tag
)
8084 case DW_TAG_padding
:
8085 return "DW_TAG_padding";
8086 case DW_TAG_array_type
:
8087 return "DW_TAG_array_type";
8088 case DW_TAG_class_type
:
8089 return "DW_TAG_class_type";
8090 case DW_TAG_entry_point
:
8091 return "DW_TAG_entry_point";
8092 case DW_TAG_enumeration_type
:
8093 return "DW_TAG_enumeration_type";
8094 case DW_TAG_formal_parameter
:
8095 return "DW_TAG_formal_parameter";
8096 case DW_TAG_imported_declaration
:
8097 return "DW_TAG_imported_declaration";
8099 return "DW_TAG_label";
8100 case DW_TAG_lexical_block
:
8101 return "DW_TAG_lexical_block";
8103 return "DW_TAG_member";
8104 case DW_TAG_pointer_type
:
8105 return "DW_TAG_pointer_type";
8106 case DW_TAG_reference_type
:
8107 return "DW_TAG_reference_type";
8108 case DW_TAG_compile_unit
:
8109 return "DW_TAG_compile_unit";
8110 case DW_TAG_string_type
:
8111 return "DW_TAG_string_type";
8112 case DW_TAG_structure_type
:
8113 return "DW_TAG_structure_type";
8114 case DW_TAG_subroutine_type
:
8115 return "DW_TAG_subroutine_type";
8116 case DW_TAG_typedef
:
8117 return "DW_TAG_typedef";
8118 case DW_TAG_union_type
:
8119 return "DW_TAG_union_type";
8120 case DW_TAG_unspecified_parameters
:
8121 return "DW_TAG_unspecified_parameters";
8122 case DW_TAG_variant
:
8123 return "DW_TAG_variant";
8124 case DW_TAG_common_block
:
8125 return "DW_TAG_common_block";
8126 case DW_TAG_common_inclusion
:
8127 return "DW_TAG_common_inclusion";
8128 case DW_TAG_inheritance
:
8129 return "DW_TAG_inheritance";
8130 case DW_TAG_inlined_subroutine
:
8131 return "DW_TAG_inlined_subroutine";
8133 return "DW_TAG_module";
8134 case DW_TAG_ptr_to_member_type
:
8135 return "DW_TAG_ptr_to_member_type";
8136 case DW_TAG_set_type
:
8137 return "DW_TAG_set_type";
8138 case DW_TAG_subrange_type
:
8139 return "DW_TAG_subrange_type";
8140 case DW_TAG_with_stmt
:
8141 return "DW_TAG_with_stmt";
8142 case DW_TAG_access_declaration
:
8143 return "DW_TAG_access_declaration";
8144 case DW_TAG_base_type
:
8145 return "DW_TAG_base_type";
8146 case DW_TAG_catch_block
:
8147 return "DW_TAG_catch_block";
8148 case DW_TAG_const_type
:
8149 return "DW_TAG_const_type";
8150 case DW_TAG_constant
:
8151 return "DW_TAG_constant";
8152 case DW_TAG_enumerator
:
8153 return "DW_TAG_enumerator";
8154 case DW_TAG_file_type
:
8155 return "DW_TAG_file_type";
8157 return "DW_TAG_friend";
8158 case DW_TAG_namelist
:
8159 return "DW_TAG_namelist";
8160 case DW_TAG_namelist_item
:
8161 return "DW_TAG_namelist_item";
8162 case DW_TAG_packed_type
:
8163 return "DW_TAG_packed_type";
8164 case DW_TAG_subprogram
:
8165 return "DW_TAG_subprogram";
8166 case DW_TAG_template_type_param
:
8167 return "DW_TAG_template_type_param";
8168 case DW_TAG_template_value_param
:
8169 return "DW_TAG_template_value_param";
8170 case DW_TAG_thrown_type
:
8171 return "DW_TAG_thrown_type";
8172 case DW_TAG_try_block
:
8173 return "DW_TAG_try_block";
8174 case DW_TAG_variant_part
:
8175 return "DW_TAG_variant_part";
8176 case DW_TAG_variable
:
8177 return "DW_TAG_variable";
8178 case DW_TAG_volatile_type
:
8179 return "DW_TAG_volatile_type";
8180 case DW_TAG_dwarf_procedure
:
8181 return "DW_TAG_dwarf_procedure";
8182 case DW_TAG_restrict_type
:
8183 return "DW_TAG_restrict_type";
8184 case DW_TAG_interface_type
:
8185 return "DW_TAG_interface_type";
8186 case DW_TAG_namespace
:
8187 return "DW_TAG_namespace";
8188 case DW_TAG_imported_module
:
8189 return "DW_TAG_imported_module";
8190 case DW_TAG_unspecified_type
:
8191 return "DW_TAG_unspecified_type";
8192 case DW_TAG_partial_unit
:
8193 return "DW_TAG_partial_unit";
8194 case DW_TAG_imported_unit
:
8195 return "DW_TAG_imported_unit";
8196 case DW_TAG_condition
:
8197 return "DW_TAG_condition";
8198 case DW_TAG_shared_type
:
8199 return "DW_TAG_shared_type";
8200 case DW_TAG_MIPS_loop
:
8201 return "DW_TAG_MIPS_loop";
8202 case DW_TAG_HP_array_descriptor
:
8203 return "DW_TAG_HP_array_descriptor";
8204 case DW_TAG_format_label
:
8205 return "DW_TAG_format_label";
8206 case DW_TAG_function_template
:
8207 return "DW_TAG_function_template";
8208 case DW_TAG_class_template
:
8209 return "DW_TAG_class_template";
8210 case DW_TAG_GNU_BINCL
:
8211 return "DW_TAG_GNU_BINCL";
8212 case DW_TAG_GNU_EINCL
:
8213 return "DW_TAG_GNU_EINCL";
8214 case DW_TAG_upc_shared_type
:
8215 return "DW_TAG_upc_shared_type";
8216 case DW_TAG_upc_strict_type
:
8217 return "DW_TAG_upc_strict_type";
8218 case DW_TAG_upc_relaxed_type
:
8219 return "DW_TAG_upc_relaxed_type";
8220 case DW_TAG_PGI_kanji_type
:
8221 return "DW_TAG_PGI_kanji_type";
8222 case DW_TAG_PGI_interface_block
:
8223 return "DW_TAG_PGI_interface_block";
8225 return "DW_TAG_<unknown>";
8229 /* Convert a DWARF attribute code into its string name. */
8232 dwarf_attr_name (unsigned attr
)
8237 return "DW_AT_sibling";
8238 case DW_AT_location
:
8239 return "DW_AT_location";
8241 return "DW_AT_name";
8242 case DW_AT_ordering
:
8243 return "DW_AT_ordering";
8244 case DW_AT_subscr_data
:
8245 return "DW_AT_subscr_data";
8246 case DW_AT_byte_size
:
8247 return "DW_AT_byte_size";
8248 case DW_AT_bit_offset
:
8249 return "DW_AT_bit_offset";
8250 case DW_AT_bit_size
:
8251 return "DW_AT_bit_size";
8252 case DW_AT_element_list
:
8253 return "DW_AT_element_list";
8254 case DW_AT_stmt_list
:
8255 return "DW_AT_stmt_list";
8257 return "DW_AT_low_pc";
8259 return "DW_AT_high_pc";
8260 case DW_AT_language
:
8261 return "DW_AT_language";
8263 return "DW_AT_member";
8265 return "DW_AT_discr";
8266 case DW_AT_discr_value
:
8267 return "DW_AT_discr_value";
8268 case DW_AT_visibility
:
8269 return "DW_AT_visibility";
8271 return "DW_AT_import";
8272 case DW_AT_string_length
:
8273 return "DW_AT_string_length";
8274 case DW_AT_common_reference
:
8275 return "DW_AT_common_reference";
8276 case DW_AT_comp_dir
:
8277 return "DW_AT_comp_dir";
8278 case DW_AT_const_value
:
8279 return "DW_AT_const_value";
8280 case DW_AT_containing_type
:
8281 return "DW_AT_containing_type";
8282 case DW_AT_default_value
:
8283 return "DW_AT_default_value";
8285 return "DW_AT_inline";
8286 case DW_AT_is_optional
:
8287 return "DW_AT_is_optional";
8288 case DW_AT_lower_bound
:
8289 return "DW_AT_lower_bound";
8290 case DW_AT_producer
:
8291 return "DW_AT_producer";
8292 case DW_AT_prototyped
:
8293 return "DW_AT_prototyped";
8294 case DW_AT_return_addr
:
8295 return "DW_AT_return_addr";
8296 case DW_AT_start_scope
:
8297 return "DW_AT_start_scope";
8298 case DW_AT_bit_stride
:
8299 return "DW_AT_bit_stride";
8300 case DW_AT_upper_bound
:
8301 return "DW_AT_upper_bound";
8302 case DW_AT_abstract_origin
:
8303 return "DW_AT_abstract_origin";
8304 case DW_AT_accessibility
:
8305 return "DW_AT_accessibility";
8306 case DW_AT_address_class
:
8307 return "DW_AT_address_class";
8308 case DW_AT_artificial
:
8309 return "DW_AT_artificial";
8310 case DW_AT_base_types
:
8311 return "DW_AT_base_types";
8312 case DW_AT_calling_convention
:
8313 return "DW_AT_calling_convention";
8315 return "DW_AT_count";
8316 case DW_AT_data_member_location
:
8317 return "DW_AT_data_member_location";
8318 case DW_AT_decl_column
:
8319 return "DW_AT_decl_column";
8320 case DW_AT_decl_file
:
8321 return "DW_AT_decl_file";
8322 case DW_AT_decl_line
:
8323 return "DW_AT_decl_line";
8324 case DW_AT_declaration
:
8325 return "DW_AT_declaration";
8326 case DW_AT_discr_list
:
8327 return "DW_AT_discr_list";
8328 case DW_AT_encoding
:
8329 return "DW_AT_encoding";
8330 case DW_AT_external
:
8331 return "DW_AT_external";
8332 case DW_AT_frame_base
:
8333 return "DW_AT_frame_base";
8335 return "DW_AT_friend";
8336 case DW_AT_identifier_case
:
8337 return "DW_AT_identifier_case";
8338 case DW_AT_macro_info
:
8339 return "DW_AT_macro_info";
8340 case DW_AT_namelist_items
:
8341 return "DW_AT_namelist_items";
8342 case DW_AT_priority
:
8343 return "DW_AT_priority";
8345 return "DW_AT_segment";
8346 case DW_AT_specification
:
8347 return "DW_AT_specification";
8348 case DW_AT_static_link
:
8349 return "DW_AT_static_link";
8351 return "DW_AT_type";
8352 case DW_AT_use_location
:
8353 return "DW_AT_use_location";
8354 case DW_AT_variable_parameter
:
8355 return "DW_AT_variable_parameter";
8356 case DW_AT_virtuality
:
8357 return "DW_AT_virtuality";
8358 case DW_AT_vtable_elem_location
:
8359 return "DW_AT_vtable_elem_location";
8360 /* DWARF 3 values. */
8361 case DW_AT_allocated
:
8362 return "DW_AT_allocated";
8363 case DW_AT_associated
:
8364 return "DW_AT_associated";
8365 case DW_AT_data_location
:
8366 return "DW_AT_data_location";
8367 case DW_AT_byte_stride
:
8368 return "DW_AT_byte_stride";
8369 case DW_AT_entry_pc
:
8370 return "DW_AT_entry_pc";
8371 case DW_AT_use_UTF8
:
8372 return "DW_AT_use_UTF8";
8373 case DW_AT_extension
:
8374 return "DW_AT_extension";
8376 return "DW_AT_ranges";
8377 case DW_AT_trampoline
:
8378 return "DW_AT_trampoline";
8379 case DW_AT_call_column
:
8380 return "DW_AT_call_column";
8381 case DW_AT_call_file
:
8382 return "DW_AT_call_file";
8383 case DW_AT_call_line
:
8384 return "DW_AT_call_line";
8385 case DW_AT_description
:
8386 return "DW_AT_description";
8387 case DW_AT_binary_scale
:
8388 return "DW_AT_binary_scale";
8389 case DW_AT_decimal_scale
:
8390 return "DW_AT_decimal_scale";
8392 return "DW_AT_small";
8393 case DW_AT_decimal_sign
:
8394 return "DW_AT_decimal_sign";
8395 case DW_AT_digit_count
:
8396 return "DW_AT_digit_count";
8397 case DW_AT_picture_string
:
8398 return "DW_AT_picture_string";
8400 return "DW_AT_mutable";
8401 case DW_AT_threads_scaled
:
8402 return "DW_AT_threads_scaled";
8403 case DW_AT_explicit
:
8404 return "DW_AT_explicit";
8405 case DW_AT_object_pointer
:
8406 return "DW_AT_object_pointer";
8407 case DW_AT_endianity
:
8408 return "DW_AT_endianity";
8409 case DW_AT_elemental
:
8410 return "DW_AT_elemental";
8412 return "DW_AT_pure";
8413 case DW_AT_recursive
:
8414 return "DW_AT_recursive";
8416 /* SGI/MIPS extensions. */
8417 case DW_AT_MIPS_fde
:
8418 return "DW_AT_MIPS_fde";
8419 case DW_AT_MIPS_loop_begin
:
8420 return "DW_AT_MIPS_loop_begin";
8421 case DW_AT_MIPS_tail_loop_begin
:
8422 return "DW_AT_MIPS_tail_loop_begin";
8423 case DW_AT_MIPS_epilog_begin
:
8424 return "DW_AT_MIPS_epilog_begin";
8425 case DW_AT_MIPS_loop_unroll_factor
:
8426 return "DW_AT_MIPS_loop_unroll_factor";
8427 case DW_AT_MIPS_software_pipeline_depth
:
8428 return "DW_AT_MIPS_software_pipeline_depth";
8429 case DW_AT_MIPS_linkage_name
:
8430 return "DW_AT_MIPS_linkage_name";
8431 case DW_AT_MIPS_stride
:
8432 return "DW_AT_MIPS_stride";
8433 case DW_AT_MIPS_abstract_name
:
8434 return "DW_AT_MIPS_abstract_name";
8435 case DW_AT_MIPS_clone_origin
:
8436 return "DW_AT_MIPS_clone_origin";
8437 case DW_AT_MIPS_has_inlines
:
8438 return "DW_AT_MIPS_has_inlines";
8440 /* HP extensions. */
8441 case DW_AT_HP_block_index
:
8442 return "DW_AT_HP_block_index";
8443 case DW_AT_HP_unmodifiable
:
8444 return "DW_AT_HP_unmodifiable";
8445 case DW_AT_HP_actuals_stmt_list
:
8446 return "DW_AT_HP_actuals_stmt_list";
8447 case DW_AT_HP_proc_per_section
:
8448 return "DW_AT_HP_proc_per_section";
8449 case DW_AT_HP_raw_data_ptr
:
8450 return "DW_AT_HP_raw_data_ptr";
8451 case DW_AT_HP_pass_by_reference
:
8452 return "DW_AT_HP_pass_by_reference";
8453 case DW_AT_HP_opt_level
:
8454 return "DW_AT_HP_opt_level";
8455 case DW_AT_HP_prof_version_id
:
8456 return "DW_AT_HP_prof_version_id";
8457 case DW_AT_HP_opt_flags
:
8458 return "DW_AT_HP_opt_flags";
8459 case DW_AT_HP_cold_region_low_pc
:
8460 return "DW_AT_HP_cold_region_low_pc";
8461 case DW_AT_HP_cold_region_high_pc
:
8462 return "DW_AT_HP_cold_region_high_pc";
8463 case DW_AT_HP_all_variables_modifiable
:
8464 return "DW_AT_HP_all_variables_modifiable";
8465 case DW_AT_HP_linkage_name
:
8466 return "DW_AT_HP_linkage_name";
8467 case DW_AT_HP_prof_flags
:
8468 return "DW_AT_HP_prof_flags";
8469 /* GNU extensions. */
8470 case DW_AT_sf_names
:
8471 return "DW_AT_sf_names";
8472 case DW_AT_src_info
:
8473 return "DW_AT_src_info";
8474 case DW_AT_mac_info
:
8475 return "DW_AT_mac_info";
8476 case DW_AT_src_coords
:
8477 return "DW_AT_src_coords";
8478 case DW_AT_body_begin
:
8479 return "DW_AT_body_begin";
8480 case DW_AT_body_end
:
8481 return "DW_AT_body_end";
8482 case DW_AT_GNU_vector
:
8483 return "DW_AT_GNU_vector";
8484 /* VMS extensions. */
8485 case DW_AT_VMS_rtnbeg_pd_address
:
8486 return "DW_AT_VMS_rtnbeg_pd_address";
8487 /* UPC extension. */
8488 case DW_AT_upc_threads_scaled
:
8489 return "DW_AT_upc_threads_scaled";
8490 /* PGI (STMicroelectronics) extensions. */
8491 case DW_AT_PGI_lbase
:
8492 return "DW_AT_PGI_lbase";
8493 case DW_AT_PGI_soffset
:
8494 return "DW_AT_PGI_soffset";
8495 case DW_AT_PGI_lstride
:
8496 return "DW_AT_PGI_lstride";
8498 return "DW_AT_<unknown>";
8502 /* Convert a DWARF value form code into its string name. */
8505 dwarf_form_name (unsigned form
)
8510 return "DW_FORM_addr";
8511 case DW_FORM_block2
:
8512 return "DW_FORM_block2";
8513 case DW_FORM_block4
:
8514 return "DW_FORM_block4";
8516 return "DW_FORM_data2";
8518 return "DW_FORM_data4";
8520 return "DW_FORM_data8";
8521 case DW_FORM_string
:
8522 return "DW_FORM_string";
8524 return "DW_FORM_block";
8525 case DW_FORM_block1
:
8526 return "DW_FORM_block1";
8528 return "DW_FORM_data1";
8530 return "DW_FORM_flag";
8532 return "DW_FORM_sdata";
8534 return "DW_FORM_strp";
8536 return "DW_FORM_udata";
8537 case DW_FORM_ref_addr
:
8538 return "DW_FORM_ref_addr";
8540 return "DW_FORM_ref1";
8542 return "DW_FORM_ref2";
8544 return "DW_FORM_ref4";
8546 return "DW_FORM_ref8";
8547 case DW_FORM_ref_udata
:
8548 return "DW_FORM_ref_udata";
8549 case DW_FORM_indirect
:
8550 return "DW_FORM_indirect";
8552 return "DW_FORM_<unknown>";
8556 /* Convert a DWARF stack opcode into its string name. */
8559 dwarf_stack_op_name (unsigned op
)
8564 return "DW_OP_addr";
8566 return "DW_OP_deref";
8568 return "DW_OP_const1u";
8570 return "DW_OP_const1s";
8572 return "DW_OP_const2u";
8574 return "DW_OP_const2s";
8576 return "DW_OP_const4u";
8578 return "DW_OP_const4s";
8580 return "DW_OP_const8u";
8582 return "DW_OP_const8s";
8584 return "DW_OP_constu";
8586 return "DW_OP_consts";
8590 return "DW_OP_drop";
8592 return "DW_OP_over";
8594 return "DW_OP_pick";
8596 return "DW_OP_swap";
8600 return "DW_OP_xderef";
8608 return "DW_OP_minus";
8620 return "DW_OP_plus";
8621 case DW_OP_plus_uconst
:
8622 return "DW_OP_plus_uconst";
8628 return "DW_OP_shra";
8646 return "DW_OP_skip";
8648 return "DW_OP_lit0";
8650 return "DW_OP_lit1";
8652 return "DW_OP_lit2";
8654 return "DW_OP_lit3";
8656 return "DW_OP_lit4";
8658 return "DW_OP_lit5";
8660 return "DW_OP_lit6";
8662 return "DW_OP_lit7";
8664 return "DW_OP_lit8";
8666 return "DW_OP_lit9";
8668 return "DW_OP_lit10";
8670 return "DW_OP_lit11";
8672 return "DW_OP_lit12";
8674 return "DW_OP_lit13";
8676 return "DW_OP_lit14";
8678 return "DW_OP_lit15";
8680 return "DW_OP_lit16";
8682 return "DW_OP_lit17";
8684 return "DW_OP_lit18";
8686 return "DW_OP_lit19";
8688 return "DW_OP_lit20";
8690 return "DW_OP_lit21";
8692 return "DW_OP_lit22";
8694 return "DW_OP_lit23";
8696 return "DW_OP_lit24";
8698 return "DW_OP_lit25";
8700 return "DW_OP_lit26";
8702 return "DW_OP_lit27";
8704 return "DW_OP_lit28";
8706 return "DW_OP_lit29";
8708 return "DW_OP_lit30";
8710 return "DW_OP_lit31";
8712 return "DW_OP_reg0";
8714 return "DW_OP_reg1";
8716 return "DW_OP_reg2";
8718 return "DW_OP_reg3";
8720 return "DW_OP_reg4";
8722 return "DW_OP_reg5";
8724 return "DW_OP_reg6";
8726 return "DW_OP_reg7";
8728 return "DW_OP_reg8";
8730 return "DW_OP_reg9";
8732 return "DW_OP_reg10";
8734 return "DW_OP_reg11";
8736 return "DW_OP_reg12";
8738 return "DW_OP_reg13";
8740 return "DW_OP_reg14";
8742 return "DW_OP_reg15";
8744 return "DW_OP_reg16";
8746 return "DW_OP_reg17";
8748 return "DW_OP_reg18";
8750 return "DW_OP_reg19";
8752 return "DW_OP_reg20";
8754 return "DW_OP_reg21";
8756 return "DW_OP_reg22";
8758 return "DW_OP_reg23";
8760 return "DW_OP_reg24";
8762 return "DW_OP_reg25";
8764 return "DW_OP_reg26";
8766 return "DW_OP_reg27";
8768 return "DW_OP_reg28";
8770 return "DW_OP_reg29";
8772 return "DW_OP_reg30";
8774 return "DW_OP_reg31";
8776 return "DW_OP_breg0";
8778 return "DW_OP_breg1";
8780 return "DW_OP_breg2";
8782 return "DW_OP_breg3";
8784 return "DW_OP_breg4";
8786 return "DW_OP_breg5";
8788 return "DW_OP_breg6";
8790 return "DW_OP_breg7";
8792 return "DW_OP_breg8";
8794 return "DW_OP_breg9";
8796 return "DW_OP_breg10";
8798 return "DW_OP_breg11";
8800 return "DW_OP_breg12";
8802 return "DW_OP_breg13";
8804 return "DW_OP_breg14";
8806 return "DW_OP_breg15";
8808 return "DW_OP_breg16";
8810 return "DW_OP_breg17";
8812 return "DW_OP_breg18";
8814 return "DW_OP_breg19";
8816 return "DW_OP_breg20";
8818 return "DW_OP_breg21";
8820 return "DW_OP_breg22";
8822 return "DW_OP_breg23";
8824 return "DW_OP_breg24";
8826 return "DW_OP_breg25";
8828 return "DW_OP_breg26";
8830 return "DW_OP_breg27";
8832 return "DW_OP_breg28";
8834 return "DW_OP_breg29";
8836 return "DW_OP_breg30";
8838 return "DW_OP_breg31";
8840 return "DW_OP_regx";
8842 return "DW_OP_fbreg";
8844 return "DW_OP_bregx";
8846 return "DW_OP_piece";
8847 case DW_OP_deref_size
:
8848 return "DW_OP_deref_size";
8849 case DW_OP_xderef_size
:
8850 return "DW_OP_xderef_size";
8853 /* DWARF 3 extensions. */
8854 case DW_OP_push_object_address
:
8855 return "DW_OP_push_object_address";
8857 return "DW_OP_call2";
8859 return "DW_OP_call4";
8860 case DW_OP_call_ref
:
8861 return "DW_OP_call_ref";
8862 /* GNU extensions. */
8863 case DW_OP_form_tls_address
:
8864 return "DW_OP_form_tls_address";
8865 case DW_OP_call_frame_cfa
:
8866 return "DW_OP_call_frame_cfa";
8867 case DW_OP_bit_piece
:
8868 return "DW_OP_bit_piece";
8869 case DW_OP_GNU_push_tls_address
:
8870 return "DW_OP_GNU_push_tls_address";
8871 case DW_OP_GNU_uninit
:
8872 return "DW_OP_GNU_uninit";
8873 /* HP extensions. */
8874 case DW_OP_HP_is_value
:
8875 return "DW_OP_HP_is_value";
8876 case DW_OP_HP_fltconst4
:
8877 return "DW_OP_HP_fltconst4";
8878 case DW_OP_HP_fltconst8
:
8879 return "DW_OP_HP_fltconst8";
8880 case DW_OP_HP_mod_range
:
8881 return "DW_OP_HP_mod_range";
8882 case DW_OP_HP_unmod_range
:
8883 return "DW_OP_HP_unmod_range";
8885 return "DW_OP_HP_tls";
8887 return "OP_<unknown>";
8892 dwarf_bool_name (unsigned mybool
)
8900 /* Convert a DWARF type code into its string name. */
8903 dwarf_type_encoding_name (unsigned enc
)
8908 return "DW_ATE_void";
8909 case DW_ATE_address
:
8910 return "DW_ATE_address";
8911 case DW_ATE_boolean
:
8912 return "DW_ATE_boolean";
8913 case DW_ATE_complex_float
:
8914 return "DW_ATE_complex_float";
8916 return "DW_ATE_float";
8918 return "DW_ATE_signed";
8919 case DW_ATE_signed_char
:
8920 return "DW_ATE_signed_char";
8921 case DW_ATE_unsigned
:
8922 return "DW_ATE_unsigned";
8923 case DW_ATE_unsigned_char
:
8924 return "DW_ATE_unsigned_char";
8926 case DW_ATE_imaginary_float
:
8927 return "DW_ATE_imaginary_float";
8928 case DW_ATE_packed_decimal
:
8929 return "DW_ATE_packed_decimal";
8930 case DW_ATE_numeric_string
:
8931 return "DW_ATE_numeric_string";
8933 return "DW_ATE_edited";
8934 case DW_ATE_signed_fixed
:
8935 return "DW_ATE_signed_fixed";
8936 case DW_ATE_unsigned_fixed
:
8937 return "DW_ATE_unsigned_fixed";
8938 case DW_ATE_decimal_float
:
8939 return "DW_ATE_decimal_float";
8940 /* HP extensions. */
8941 case DW_ATE_HP_float80
:
8942 return "DW_ATE_HP_float80";
8943 case DW_ATE_HP_complex_float80
:
8944 return "DW_ATE_HP_complex_float80";
8945 case DW_ATE_HP_float128
:
8946 return "DW_ATE_HP_float128";
8947 case DW_ATE_HP_complex_float128
:
8948 return "DW_ATE_HP_complex_float128";
8949 case DW_ATE_HP_floathpintel
:
8950 return "DW_ATE_HP_floathpintel";
8951 case DW_ATE_HP_imaginary_float80
:
8952 return "DW_ATE_HP_imaginary_float80";
8953 case DW_ATE_HP_imaginary_float128
:
8954 return "DW_ATE_HP_imaginary_float128";
8956 return "DW_ATE_<unknown>";
8960 /* Convert a DWARF call frame info operation to its string name. */
8964 dwarf_cfi_name (unsigned cfi_opc
)
8968 case DW_CFA_advance_loc
:
8969 return "DW_CFA_advance_loc";
8971 return "DW_CFA_offset";
8972 case DW_CFA_restore
:
8973 return "DW_CFA_restore";
8975 return "DW_CFA_nop";
8976 case DW_CFA_set_loc
:
8977 return "DW_CFA_set_loc";
8978 case DW_CFA_advance_loc1
:
8979 return "DW_CFA_advance_loc1";
8980 case DW_CFA_advance_loc2
:
8981 return "DW_CFA_advance_loc2";
8982 case DW_CFA_advance_loc4
:
8983 return "DW_CFA_advance_loc4";
8984 case DW_CFA_offset_extended
:
8985 return "DW_CFA_offset_extended";
8986 case DW_CFA_restore_extended
:
8987 return "DW_CFA_restore_extended";
8988 case DW_CFA_undefined
:
8989 return "DW_CFA_undefined";
8990 case DW_CFA_same_value
:
8991 return "DW_CFA_same_value";
8992 case DW_CFA_register
:
8993 return "DW_CFA_register";
8994 case DW_CFA_remember_state
:
8995 return "DW_CFA_remember_state";
8996 case DW_CFA_restore_state
:
8997 return "DW_CFA_restore_state";
8998 case DW_CFA_def_cfa
:
8999 return "DW_CFA_def_cfa";
9000 case DW_CFA_def_cfa_register
:
9001 return "DW_CFA_def_cfa_register";
9002 case DW_CFA_def_cfa_offset
:
9003 return "DW_CFA_def_cfa_offset";
9005 case DW_CFA_def_cfa_expression
:
9006 return "DW_CFA_def_cfa_expression";
9007 case DW_CFA_expression
:
9008 return "DW_CFA_expression";
9009 case DW_CFA_offset_extended_sf
:
9010 return "DW_CFA_offset_extended_sf";
9011 case DW_CFA_def_cfa_sf
:
9012 return "DW_CFA_def_cfa_sf";
9013 case DW_CFA_def_cfa_offset_sf
:
9014 return "DW_CFA_def_cfa_offset_sf";
9015 case DW_CFA_val_offset
:
9016 return "DW_CFA_val_offset";
9017 case DW_CFA_val_offset_sf
:
9018 return "DW_CFA_val_offset_sf";
9019 case DW_CFA_val_expression
:
9020 return "DW_CFA_val_expression";
9021 /* SGI/MIPS specific. */
9022 case DW_CFA_MIPS_advance_loc8
:
9023 return "DW_CFA_MIPS_advance_loc8";
9024 /* GNU extensions. */
9025 case DW_CFA_GNU_window_save
:
9026 return "DW_CFA_GNU_window_save";
9027 case DW_CFA_GNU_args_size
:
9028 return "DW_CFA_GNU_args_size";
9029 case DW_CFA_GNU_negative_offset_extended
:
9030 return "DW_CFA_GNU_negative_offset_extended";
9032 return "DW_CFA_<unknown>";
9038 dump_die (struct die_info
*die
)
9042 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
9043 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9044 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
9045 dwarf_bool_name (die
->child
!= NULL
));
9047 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
9048 for (i
= 0; i
< die
->num_attrs
; ++i
)
9050 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
9051 dwarf_attr_name (die
->attrs
[i
].name
),
9052 dwarf_form_name (die
->attrs
[i
].form
));
9053 switch (die
->attrs
[i
].form
)
9055 case DW_FORM_ref_addr
:
9057 fprintf_unfiltered (gdb_stderr
, "address: ");
9058 fputs_filtered (paddress (DW_ADDR (&die
->attrs
[i
])), gdb_stderr
);
9060 case DW_FORM_block2
:
9061 case DW_FORM_block4
:
9063 case DW_FORM_block1
:
9064 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
9069 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
9070 (long) (DW_ADDR (&die
->attrs
[i
])));
9078 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
9080 case DW_FORM_string
:
9082 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
9083 DW_STRING (&die
->attrs
[i
])
9084 ? DW_STRING (&die
->attrs
[i
]) : "");
9087 if (DW_UNSND (&die
->attrs
[i
]))
9088 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
9090 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
9092 case DW_FORM_indirect
:
9093 /* the reader will have reduced the indirect form to
9094 the "base form" so this form should not occur */
9095 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
9098 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
9099 die
->attrs
[i
].form
);
9101 fprintf_unfiltered (gdb_stderr
, "\n");
9106 dump_die_list (struct die_info
*die
)
9111 if (die
->child
!= NULL
)
9112 dump_die_list (die
->child
);
9113 if (die
->sibling
!= NULL
)
9114 dump_die_list (die
->sibling
);
9119 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
9123 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
9129 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
9131 unsigned int result
= 0;
9135 case DW_FORM_ref_addr
:
9140 case DW_FORM_ref_udata
:
9141 result
= DW_ADDR (attr
);
9144 complaint (&symfile_complaints
,
9145 _("unsupported die ref attribute form: '%s'"),
9146 dwarf_form_name (attr
->form
));
9151 /* Return the constant value held by the given attribute. Return -1
9152 if the value held by the attribute is not constant. */
9155 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9157 if (attr
->form
== DW_FORM_sdata
)
9158 return DW_SND (attr
);
9159 else if (attr
->form
== DW_FORM_udata
9160 || attr
->form
== DW_FORM_data1
9161 || attr
->form
== DW_FORM_data2
9162 || attr
->form
== DW_FORM_data4
9163 || attr
->form
== DW_FORM_data8
)
9164 return DW_UNSND (attr
);
9167 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9168 dwarf_form_name (attr
->form
));
9169 return default_value
;
9173 static struct die_info
*
9174 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9175 struct dwarf2_cu
*cu
)
9177 struct die_info
*die
;
9178 unsigned int offset
;
9179 struct die_info temp_die
;
9180 struct dwarf2_cu
*target_cu
;
9182 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9184 if (DW_ADDR (attr
) < cu
->header
.offset
9185 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9187 struct dwarf2_per_cu_data
*per_cu
;
9188 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9190 target_cu
= per_cu
->cu
;
9195 temp_die
.offset
= offset
;
9196 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
9200 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9201 "at 0x%lx [in module %s]"),
9202 (long) offset
, (long) src_die
->offset
, cu
->objfile
->name
);
9205 /* Decode simple location descriptions.
9206 Given a pointer to a dwarf block that defines a location, compute
9207 the location and return the value.
9209 NOTE drow/2003-11-18: This function is called in two situations
9210 now: for the address of static or global variables (partial symbols
9211 only) and for offsets into structures which are expected to be
9212 (more or less) constant. The partial symbol case should go away,
9213 and only the constant case should remain. That will let this
9214 function complain more accurately. A few special modes are allowed
9215 without complaint for global variables (for instance, global
9216 register values and thread-local values).
9218 A location description containing no operations indicates that the
9219 object is optimized out. The return value is 0 for that case.
9220 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9221 callers will only want a very basic result and this can become a
9224 Note that stack[0] is unused except as a default error return.
9225 Note that stack overflow is not yet handled. */
9228 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9230 struct objfile
*objfile
= cu
->objfile
;
9231 struct comp_unit_head
*cu_header
= &cu
->header
;
9233 int size
= blk
->size
;
9234 gdb_byte
*data
= blk
->data
;
9235 CORE_ADDR stack
[64];
9237 unsigned int bytes_read
, unsnd
;
9281 stack
[++stacki
] = op
- DW_OP_lit0
;
9316 stack
[++stacki
] = op
- DW_OP_reg0
;
9318 dwarf2_complex_location_expr_complaint ();
9322 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9324 stack
[++stacki
] = unsnd
;
9326 dwarf2_complex_location_expr_complaint ();
9330 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9336 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9341 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9346 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9351 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9356 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9361 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9366 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9372 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9377 stack
[stacki
+ 1] = stack
[stacki
];
9382 stack
[stacki
- 1] += stack
[stacki
];
9386 case DW_OP_plus_uconst
:
9387 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9392 stack
[stacki
- 1] -= stack
[stacki
];
9397 /* If we're not the last op, then we definitely can't encode
9398 this using GDB's address_class enum. This is valid for partial
9399 global symbols, although the variable's address will be bogus
9402 dwarf2_complex_location_expr_complaint ();
9405 case DW_OP_GNU_push_tls_address
:
9406 /* The top of the stack has the offset from the beginning
9407 of the thread control block at which the variable is located. */
9408 /* Nothing should follow this operator, so the top of stack would
9410 /* This is valid for partial global symbols, but the variable's
9411 address will be bogus in the psymtab. */
9413 dwarf2_complex_location_expr_complaint ();
9416 case DW_OP_GNU_uninit
:
9420 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9421 dwarf_stack_op_name (op
));
9422 return (stack
[stacki
]);
9425 return (stack
[stacki
]);
9428 /* memory allocation interface */
9430 static struct dwarf_block
*
9431 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9433 struct dwarf_block
*blk
;
9435 blk
= (struct dwarf_block
*)
9436 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9440 static struct abbrev_info
*
9441 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9443 struct abbrev_info
*abbrev
;
9445 abbrev
= (struct abbrev_info
*)
9446 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9447 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9451 static struct die_info
*
9452 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
9454 struct die_info
*die
;
9455 size_t size
= sizeof (struct die_info
);
9458 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
9460 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
9461 memset (die
, 0, sizeof (struct die_info
));
9466 /* Macro support. */
9469 /* Return the full name of file number I in *LH's file name table.
9470 Use COMP_DIR as the name of the current directory of the
9471 compilation. The result is allocated using xmalloc; the caller is
9472 responsible for freeing it. */
9474 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9476 /* Is the file number a valid index into the line header's file name
9477 table? Remember that file numbers start with one, not zero. */
9478 if (1 <= file
&& file
<= lh
->num_file_names
)
9480 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9482 if (IS_ABSOLUTE_PATH (fe
->name
))
9483 return xstrdup (fe
->name
);
9491 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9497 dir_len
= strlen (dir
);
9498 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9499 strcpy (full_name
, dir
);
9500 full_name
[dir_len
] = '/';
9501 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9505 return xstrdup (fe
->name
);
9510 /* The compiler produced a bogus file number. We can at least
9511 record the macro definitions made in the file, even if we
9512 won't be able to find the file by name. */
9514 sprintf (fake_name
, "<bad macro file number %d>", file
);
9516 complaint (&symfile_complaints
,
9517 _("bad file number in macro information (%d)"),
9520 return xstrdup (fake_name
);
9525 static struct macro_source_file
*
9526 macro_start_file (int file
, int line
,
9527 struct macro_source_file
*current_file
,
9528 const char *comp_dir
,
9529 struct line_header
*lh
, struct objfile
*objfile
)
9531 /* The full name of this source file. */
9532 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9534 /* We don't create a macro table for this compilation unit
9535 at all until we actually get a filename. */
9536 if (! pending_macros
)
9537 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9538 objfile
->macro_cache
);
9541 /* If we have no current file, then this must be the start_file
9542 directive for the compilation unit's main source file. */
9543 current_file
= macro_set_main (pending_macros
, full_name
);
9545 current_file
= macro_include (current_file
, line
, full_name
);
9549 return current_file
;
9553 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9554 followed by a null byte. */
9556 copy_string (const char *buf
, int len
)
9558 char *s
= xmalloc (len
+ 1);
9559 memcpy (s
, buf
, len
);
9567 consume_improper_spaces (const char *p
, const char *body
)
9571 complaint (&symfile_complaints
,
9572 _("macro definition contains spaces in formal argument list:\n`%s'"),
9584 parse_macro_definition (struct macro_source_file
*file
, int line
,
9589 /* The body string takes one of two forms. For object-like macro
9590 definitions, it should be:
9592 <macro name> " " <definition>
9594 For function-like macro definitions, it should be:
9596 <macro name> "() " <definition>
9598 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9600 Spaces may appear only where explicitly indicated, and in the
9603 The Dwarf 2 spec says that an object-like macro's name is always
9604 followed by a space, but versions of GCC around March 2002 omit
9605 the space when the macro's definition is the empty string.
9607 The Dwarf 2 spec says that there should be no spaces between the
9608 formal arguments in a function-like macro's formal argument list,
9609 but versions of GCC around March 2002 include spaces after the
9613 /* Find the extent of the macro name. The macro name is terminated
9614 by either a space or null character (for an object-like macro) or
9615 an opening paren (for a function-like macro). */
9616 for (p
= body
; *p
; p
++)
9617 if (*p
== ' ' || *p
== '(')
9620 if (*p
== ' ' || *p
== '\0')
9622 /* It's an object-like macro. */
9623 int name_len
= p
- body
;
9624 char *name
= copy_string (body
, name_len
);
9625 const char *replacement
;
9628 replacement
= body
+ name_len
+ 1;
9631 dwarf2_macro_malformed_definition_complaint (body
);
9632 replacement
= body
+ name_len
;
9635 macro_define_object (file
, line
, name
, replacement
);
9641 /* It's a function-like macro. */
9642 char *name
= copy_string (body
, p
- body
);
9645 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9649 p
= consume_improper_spaces (p
, body
);
9651 /* Parse the formal argument list. */
9652 while (*p
&& *p
!= ')')
9654 /* Find the extent of the current argument name. */
9655 const char *arg_start
= p
;
9657 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9660 if (! *p
|| p
== arg_start
)
9661 dwarf2_macro_malformed_definition_complaint (body
);
9664 /* Make sure argv has room for the new argument. */
9665 if (argc
>= argv_size
)
9668 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9671 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9674 p
= consume_improper_spaces (p
, body
);
9676 /* Consume the comma, if present. */
9681 p
= consume_improper_spaces (p
, body
);
9690 /* Perfectly formed definition, no complaints. */
9691 macro_define_function (file
, line
, name
,
9692 argc
, (const char **) argv
,
9694 else if (*p
== '\0')
9696 /* Complain, but do define it. */
9697 dwarf2_macro_malformed_definition_complaint (body
);
9698 macro_define_function (file
, line
, name
,
9699 argc
, (const char **) argv
,
9703 /* Just complain. */
9704 dwarf2_macro_malformed_definition_complaint (body
);
9707 /* Just complain. */
9708 dwarf2_macro_malformed_definition_complaint (body
);
9714 for (i
= 0; i
< argc
; i
++)
9720 dwarf2_macro_malformed_definition_complaint (body
);
9725 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9726 char *comp_dir
, bfd
*abfd
,
9727 struct dwarf2_cu
*cu
)
9729 gdb_byte
*mac_ptr
, *mac_end
;
9730 struct macro_source_file
*current_file
= 0;
9732 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9734 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9738 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9739 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9740 + dwarf2_per_objfile
->macinfo_size
;
9744 enum dwarf_macinfo_record_type macinfo_type
;
9746 /* Do we at least have room for a macinfo type byte? */
9747 if (mac_ptr
>= mac_end
)
9749 dwarf2_macros_too_long_complaint ();
9753 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9756 switch (macinfo_type
)
9758 /* A zero macinfo type indicates the end of the macro
9763 case DW_MACINFO_define
:
9764 case DW_MACINFO_undef
:
9766 unsigned int bytes_read
;
9770 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9771 mac_ptr
+= bytes_read
;
9772 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9773 mac_ptr
+= bytes_read
;
9776 complaint (&symfile_complaints
,
9777 _("debug info gives macro %s outside of any file: %s"),
9779 DW_MACINFO_define
? "definition" : macinfo_type
==
9780 DW_MACINFO_undef
? "undefinition" :
9781 "something-or-other", body
);
9784 if (macinfo_type
== DW_MACINFO_define
)
9785 parse_macro_definition (current_file
, line
, body
);
9786 else if (macinfo_type
== DW_MACINFO_undef
)
9787 macro_undef (current_file
, line
, body
);
9792 case DW_MACINFO_start_file
:
9794 unsigned int bytes_read
;
9797 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9798 mac_ptr
+= bytes_read
;
9799 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9800 mac_ptr
+= bytes_read
;
9802 current_file
= macro_start_file (file
, line
,
9803 current_file
, comp_dir
,
9808 case DW_MACINFO_end_file
:
9810 complaint (&symfile_complaints
,
9811 _("macro debug info has an unmatched `close_file' directive"));
9814 current_file
= current_file
->included_by
;
9817 enum dwarf_macinfo_record_type next_type
;
9819 /* GCC circa March 2002 doesn't produce the zero
9820 type byte marking the end of the compilation
9821 unit. Complain if it's not there, but exit no
9824 /* Do we at least have room for a macinfo type byte? */
9825 if (mac_ptr
>= mac_end
)
9827 dwarf2_macros_too_long_complaint ();
9831 /* We don't increment mac_ptr here, so this is just
9833 next_type
= read_1_byte (abfd
, mac_ptr
);
9835 complaint (&symfile_complaints
,
9836 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9843 case DW_MACINFO_vendor_ext
:
9845 unsigned int bytes_read
;
9849 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9850 mac_ptr
+= bytes_read
;
9851 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9852 mac_ptr
+= bytes_read
;
9854 /* We don't recognize any vendor extensions. */
9861 /* Check if the attribute's form is a DW_FORM_block*
9862 if so return true else false. */
9864 attr_form_is_block (struct attribute
*attr
)
9866 return (attr
== NULL
? 0 :
9867 attr
->form
== DW_FORM_block1
9868 || attr
->form
== DW_FORM_block2
9869 || attr
->form
== DW_FORM_block4
9870 || attr
->form
== DW_FORM_block
);
9873 /* Return non-zero if ATTR's value is a section offset --- classes
9874 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
9875 You may use DW_UNSND (attr) to retrieve such offsets.
9877 Section 7.5.4, "Attribute Encodings", explains that no attribute
9878 may have a value that belongs to more than one of these classes; it
9879 would be ambiguous if we did, because we use the same forms for all
9882 attr_form_is_section_offset (struct attribute
*attr
)
9884 return (attr
->form
== DW_FORM_data4
9885 || attr
->form
== DW_FORM_data8
);
9889 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9890 zero otherwise. When this function returns true, you can apply
9891 dwarf2_get_attr_constant_value to it.
9893 However, note that for some attributes you must check
9894 attr_form_is_section_offset before using this test. DW_FORM_data4
9895 and DW_FORM_data8 are members of both the constant class, and of
9896 the classes that contain offsets into other debug sections
9897 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9898 that, if an attribute's can be either a constant or one of the
9899 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9900 taken as section offsets, not constants. */
9902 attr_form_is_constant (struct attribute
*attr
)
9919 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9920 struct dwarf2_cu
*cu
)
9922 if (attr_form_is_section_offset (attr
)
9923 /* ".debug_loc" may not exist at all, or the offset may be outside
9924 the section. If so, fall through to the complaint in the
9926 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9928 struct dwarf2_loclist_baton
*baton
;
9930 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9931 sizeof (struct dwarf2_loclist_baton
));
9932 baton
->per_cu
= cu
->per_cu
;
9933 gdb_assert (baton
->per_cu
);
9935 /* We don't know how long the location list is, but make sure we
9936 don't run off the edge of the section. */
9937 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9938 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9939 baton
->base_address
= cu
->header
.base_address
;
9940 if (cu
->header
.base_known
== 0)
9941 complaint (&symfile_complaints
,
9942 _("Location list used without specifying the CU base address."));
9944 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9945 SYMBOL_LOCATION_BATON (sym
) = baton
;
9949 struct dwarf2_locexpr_baton
*baton
;
9951 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9952 sizeof (struct dwarf2_locexpr_baton
));
9953 baton
->per_cu
= cu
->per_cu
;
9954 gdb_assert (baton
->per_cu
);
9956 if (attr_form_is_block (attr
))
9958 /* Note that we're just copying the block's data pointer
9959 here, not the actual data. We're still pointing into the
9960 info_buffer for SYM's objfile; right now we never release
9961 that buffer, but when we do clean up properly this may
9963 baton
->size
= DW_BLOCK (attr
)->size
;
9964 baton
->data
= DW_BLOCK (attr
)->data
;
9968 dwarf2_invalid_attrib_class_complaint ("location description",
9969 SYMBOL_NATURAL_NAME (sym
));
9974 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9975 SYMBOL_LOCATION_BATON (sym
) = baton
;
9979 /* Return the OBJFILE associated with the compilation unit CU. */
9982 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
9984 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
9986 /* Return the master objfile, so that we can report and look up the
9987 correct file containing this variable. */
9988 if (objfile
->separate_debug_objfile_backlink
)
9989 objfile
= objfile
->separate_debug_objfile_backlink
;
9994 /* Return the address size given in the compilation unit header for CU. */
9997 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
10000 return per_cu
->cu
->header
.addr_size
;
10003 /* If the CU is not currently read in, we re-read its header. */
10004 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10005 struct dwarf2_per_objfile
*per_objfile
10006 = objfile_data (objfile
, dwarf2_objfile_data_key
);
10007 gdb_byte
*info_ptr
= per_objfile
->info_buffer
+ per_cu
->offset
;
10009 struct comp_unit_head cu_header
;
10010 memset (&cu_header
, 0, sizeof cu_header
);
10011 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
10012 return cu_header
.addr_size
;
10016 /* Locate the compilation unit from CU's objfile which contains the
10017 DIE at OFFSET. Raises an error on failure. */
10019 static struct dwarf2_per_cu_data
*
10020 dwarf2_find_containing_comp_unit (unsigned long offset
,
10021 struct objfile
*objfile
)
10023 struct dwarf2_per_cu_data
*this_cu
;
10027 high
= dwarf2_per_objfile
->n_comp_units
- 1;
10030 int mid
= low
+ (high
- low
) / 2;
10031 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
10036 gdb_assert (low
== high
);
10037 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
10040 error (_("Dwarf Error: could not find partial DIE containing "
10041 "offset 0x%lx [in module %s]"),
10042 (long) offset
, bfd_get_filename (objfile
->obfd
));
10044 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
10045 return dwarf2_per_objfile
->all_comp_units
[low
-1];
10049 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
10050 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
10051 && offset
>= this_cu
->offset
+ this_cu
->length
)
10052 error (_("invalid dwarf2 offset %ld"), offset
);
10053 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
10058 /* Locate the compilation unit from OBJFILE which is located at exactly
10059 OFFSET. Raises an error on failure. */
10061 static struct dwarf2_per_cu_data
*
10062 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
10064 struct dwarf2_per_cu_data
*this_cu
;
10065 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
10066 if (this_cu
->offset
!= offset
)
10067 error (_("no compilation unit with offset %ld."), offset
);
10071 /* Release one cached compilation unit, CU. We unlink it from the tree
10072 of compilation units, but we don't remove it from the read_in_chain;
10073 the caller is responsible for that. */
10076 free_one_comp_unit (void *data
)
10078 struct dwarf2_cu
*cu
= data
;
10080 if (cu
->per_cu
!= NULL
)
10081 cu
->per_cu
->cu
= NULL
;
10084 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10089 /* This cleanup function is passed the address of a dwarf2_cu on the stack
10090 when we're finished with it. We can't free the pointer itself, but be
10091 sure to unlink it from the cache. Also release any associated storage
10092 and perform cache maintenance.
10094 Only used during partial symbol parsing. */
10097 free_stack_comp_unit (void *data
)
10099 struct dwarf2_cu
*cu
= data
;
10101 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10102 cu
->partial_dies
= NULL
;
10104 if (cu
->per_cu
!= NULL
)
10106 /* This compilation unit is on the stack in our caller, so we
10107 should not xfree it. Just unlink it. */
10108 cu
->per_cu
->cu
= NULL
;
10111 /* If we had a per-cu pointer, then we may have other compilation
10112 units loaded, so age them now. */
10113 age_cached_comp_units ();
10117 /* Free all cached compilation units. */
10120 free_cached_comp_units (void *data
)
10122 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10124 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10125 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10126 while (per_cu
!= NULL
)
10128 struct dwarf2_per_cu_data
*next_cu
;
10130 next_cu
= per_cu
->cu
->read_in_chain
;
10132 free_one_comp_unit (per_cu
->cu
);
10133 *last_chain
= next_cu
;
10139 /* Increase the age counter on each cached compilation unit, and free
10140 any that are too old. */
10143 age_cached_comp_units (void)
10145 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10147 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
10148 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10149 while (per_cu
!= NULL
)
10151 per_cu
->cu
->last_used
++;
10152 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
10153 dwarf2_mark (per_cu
->cu
);
10154 per_cu
= per_cu
->cu
->read_in_chain
;
10157 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10158 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10159 while (per_cu
!= NULL
)
10161 struct dwarf2_per_cu_data
*next_cu
;
10163 next_cu
= per_cu
->cu
->read_in_chain
;
10165 if (!per_cu
->cu
->mark
)
10167 free_one_comp_unit (per_cu
->cu
);
10168 *last_chain
= next_cu
;
10171 last_chain
= &per_cu
->cu
->read_in_chain
;
10177 /* Remove a single compilation unit from the cache. */
10180 free_one_cached_comp_unit (void *target_cu
)
10182 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10184 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10185 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10186 while (per_cu
!= NULL
)
10188 struct dwarf2_per_cu_data
*next_cu
;
10190 next_cu
= per_cu
->cu
->read_in_chain
;
10192 if (per_cu
->cu
== target_cu
)
10194 free_one_comp_unit (per_cu
->cu
);
10195 *last_chain
= next_cu
;
10199 last_chain
= &per_cu
->cu
->read_in_chain
;
10205 /* Release all extra memory associated with OBJFILE. */
10208 dwarf2_free_objfile (struct objfile
*objfile
)
10210 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10212 if (dwarf2_per_objfile
== NULL
)
10215 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10216 free_cached_comp_units (NULL
);
10218 /* Everything else should be on the objfile obstack. */
10221 /* A pair of DIE offset and GDB type pointer. We store these
10222 in a hash table separate from the DIEs, and preserve them
10223 when the DIEs are flushed out of cache. */
10225 struct dwarf2_offset_and_type
10227 unsigned int offset
;
10231 /* Hash function for a dwarf2_offset_and_type. */
10234 offset_and_type_hash (const void *item
)
10236 const struct dwarf2_offset_and_type
*ofs
= item
;
10237 return ofs
->offset
;
10240 /* Equality function for a dwarf2_offset_and_type. */
10243 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10245 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10246 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10247 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10250 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10251 table if necessary. For convenience, return TYPE. */
10253 static struct type
*
10254 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10256 struct dwarf2_offset_and_type
**slot
, ofs
;
10258 if (cu
->type_hash
== NULL
)
10260 gdb_assert (cu
->per_cu
!= NULL
);
10261 cu
->per_cu
->type_hash
10262 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10263 offset_and_type_hash
,
10264 offset_and_type_eq
,
10266 &cu
->objfile
->objfile_obstack
,
10267 hashtab_obstack_allocate
,
10268 dummy_obstack_deallocate
);
10269 cu
->type_hash
= cu
->per_cu
->type_hash
;
10272 ofs
.offset
= die
->offset
;
10274 slot
= (struct dwarf2_offset_and_type
**)
10275 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10276 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10281 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
10282 not have a saved type. */
10284 static struct type
*
10285 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10287 struct dwarf2_offset_and_type
*slot
, ofs
;
10288 htab_t type_hash
= cu
->type_hash
;
10290 if (type_hash
== NULL
)
10293 ofs
.offset
= die
->offset
;
10294 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10301 /* Set the mark field in CU and in every other compilation unit in the
10302 cache that we must keep because we are keeping CU. */
10304 /* Add a dependence relationship from CU to REF_PER_CU. */
10307 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10308 struct dwarf2_per_cu_data
*ref_per_cu
)
10312 if (cu
->dependencies
== NULL
)
10314 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10315 NULL
, &cu
->comp_unit_obstack
,
10316 hashtab_obstack_allocate
,
10317 dummy_obstack_deallocate
);
10319 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10321 *slot
= ref_per_cu
;
10324 /* Set the mark field in CU and in every other compilation unit in the
10325 cache that we must keep because we are keeping CU. */
10328 dwarf2_mark_helper (void **slot
, void *data
)
10330 struct dwarf2_per_cu_data
*per_cu
;
10332 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10333 if (per_cu
->cu
->mark
)
10335 per_cu
->cu
->mark
= 1;
10337 if (per_cu
->cu
->dependencies
!= NULL
)
10338 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10344 dwarf2_mark (struct dwarf2_cu
*cu
)
10349 if (cu
->dependencies
!= NULL
)
10350 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10354 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10358 per_cu
->cu
->mark
= 0;
10359 per_cu
= per_cu
->cu
->read_in_chain
;
10363 /* Trivial hash function for partial_die_info: the hash value of a DIE
10364 is its offset in .debug_info for this objfile. */
10367 partial_die_hash (const void *item
)
10369 const struct partial_die_info
*part_die
= item
;
10370 return part_die
->offset
;
10373 /* Trivial comparison function for partial_die_info structures: two DIEs
10374 are equal if they have the same offset. */
10377 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10379 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10380 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10381 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10384 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10385 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10388 set_dwarf2_cmd (char *args
, int from_tty
)
10390 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10394 show_dwarf2_cmd (char *args
, int from_tty
)
10396 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10399 void _initialize_dwarf2_read (void);
10402 _initialize_dwarf2_read (void)
10404 dwarf2_objfile_data_key
= register_objfile_data ();
10406 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10407 Set DWARF 2 specific variables.\n\
10408 Configure DWARF 2 variables such as the cache size"),
10409 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10410 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10412 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10413 Show DWARF 2 specific variables\n\
10414 Show DWARF 2 variables such as the cache size"),
10415 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10416 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10418 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10419 &dwarf2_max_cache_age
, _("\
10420 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10421 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10422 A higher limit means that cached compilation units will be stored\n\
10423 in memory longer, and more total memory will be used. Zero disables\n\
10424 caching, which can slow down startup."),
10426 show_dwarf2_max_cache_age
,
10427 &set_dwarf2_cmdlist
,
10428 &show_dwarf2_cmdlist
);