1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The symbol table, implemented as a hash table. */
158 const offset_type
*symbol_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index. */
208 unsigned char using_index
;
210 /* The mapped index. */
211 struct mapped_index
*index_table
;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols
;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash
;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash
;
228 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size
;
261 unsigned char signed_addr_p
;
262 unsigned int abbrev_offset
;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size
;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size
;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset
;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info
*die
;
299 typedef struct delayed_method_info delayed_method_info
;
300 DEF_VEC_O (delayed_method_info
);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile
*objfile
;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header
;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address
;
314 /* Non-zero if base_address has been set. */
317 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
319 /* The language we are debugging. */
320 enum language language
;
321 const struct language_defn
*language_defn
;
323 const char *producer
;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending
**list_in_scope
;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info
**dwarf2_abbrevs
;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack
;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack
;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data
*read_in_chain
;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data
*per_cu
;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info
*dies
;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header
*line_header
;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info
) *method_list
;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark
: 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr
: 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info
: 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header
*lines
;
401 /* The file names from the line table. */
402 const char **file_names
;
403 /* The file names from the line table after being run through
405 const char **full_names
;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab
*symtab
;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark
: 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines
: 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length
: 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued
: 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies
: 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types
: 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu
*cu
;
453 /* The corresponding objfile. */
454 struct objfile
*objfile
;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab
*psymtab
;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data
*quick
;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset
;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu
;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu
*cu
;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte
*buffer
;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length
;
511 unsigned short version
;
512 unsigned int header_length
;
513 unsigned char minimum_instruction_length
;
514 unsigned char maximum_ops_per_instruction
;
515 unsigned char default_is_stmt
;
517 unsigned char line_range
;
518 unsigned char opcode_base
;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths
;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs
, include_dirs_size
;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names
, file_names_size
;
540 unsigned int dir_index
;
541 unsigned int mod_time
;
543 int included_p
; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab
*symtab
; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte
*statement_program_start
, *statement_program_end
;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children
: 1;
564 unsigned int is_external
: 1;
565 unsigned int is_declaration
: 1;
566 unsigned int has_type
: 1;
567 unsigned int has_specification
: 1;
568 unsigned int has_pc_info
: 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set
: 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size
: 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments
: 1;
580 /* Flag set if fixup_partial_die has been called on this die. */
581 unsigned int fixup_called
: 1;
583 /* The name of this DIE. Normally the value of DW_AT_name, but
584 sometimes a default name for unnamed DIEs. */
587 /* The linkage name, if present. */
588 const char *linkage_name
;
590 /* The scope to prepend to our children. This is generally
591 allocated on the comp_unit_obstack, so will disappear
592 when this compilation unit leaves the cache. */
595 /* The location description associated with this DIE, if any. */
596 struct dwarf_block
*locdesc
;
598 /* If HAS_PC_INFO, the PC range associated with this DIE. */
602 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
603 DW_AT_sibling, if any. */
604 /* NOTE: This member isn't strictly necessary, read_partial_die could
605 return DW_AT_sibling values to its caller load_partial_dies. */
608 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
609 DW_AT_specification (or DW_AT_abstract_origin or
611 unsigned int spec_offset
;
613 /* Pointers to this DIE's parent, first child, and next sibling,
615 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
618 /* This data structure holds the information of an abbrev. */
621 unsigned int number
; /* number identifying abbrev */
622 enum dwarf_tag tag
; /* dwarf tag */
623 unsigned short has_children
; /* boolean */
624 unsigned short num_attrs
; /* number of attributes */
625 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
626 struct abbrev_info
*next
; /* next in chain */
631 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
632 ENUM_BITFIELD(dwarf_form
) form
: 16;
635 /* Attributes have a name and a value */
638 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
639 ENUM_BITFIELD(dwarf_form
) form
: 15;
641 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
642 field should be in u.str (existing only for DW_STRING) but it is kept
643 here for better struct attribute alignment. */
644 unsigned int string_is_canonical
: 1;
649 struct dwarf_block
*blk
;
653 struct signatured_type
*signatured_type
;
658 /* This data structure holds a complete die structure. */
661 /* DWARF-2 tag for this DIE. */
662 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
664 /* Number of attributes */
665 unsigned char num_attrs
;
667 /* True if we're presently building the full type name for the
668 type derived from this DIE. */
669 unsigned char building_fullname
: 1;
674 /* Offset in .debug_info or .debug_types section. */
677 /* The dies in a compilation unit form an n-ary tree. PARENT
678 points to this die's parent; CHILD points to the first child of
679 this node; and all the children of a given node are chained
680 together via their SIBLING fields. */
681 struct die_info
*child
; /* Its first child, if any. */
682 struct die_info
*sibling
; /* Its next sibling, if any. */
683 struct die_info
*parent
; /* Its parent, if any. */
685 /* An array of attributes, with NUM_ATTRS elements. There may be
686 zero, but it's not common and zero-sized arrays are not
687 sufficiently portable C. */
688 struct attribute attrs
[1];
691 struct function_range
694 CORE_ADDR lowpc
, highpc
;
696 struct function_range
*next
;
699 /* Get at parts of an attribute structure */
701 #define DW_STRING(attr) ((attr)->u.str)
702 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
703 #define DW_UNSND(attr) ((attr)->u.unsnd)
704 #define DW_BLOCK(attr) ((attr)->u.blk)
705 #define DW_SND(attr) ((attr)->u.snd)
706 #define DW_ADDR(attr) ((attr)->u.addr)
707 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
709 /* Blocks are a bunch of untyped bytes. */
716 #ifndef ATTR_ALLOC_CHUNK
717 #define ATTR_ALLOC_CHUNK 4
720 /* Allocate fields for structs, unions and enums in this size. */
721 #ifndef DW_FIELD_ALLOC_CHUNK
722 #define DW_FIELD_ALLOC_CHUNK 4
725 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
726 but this would require a corresponding change in unpack_field_as_long
728 static int bits_per_byte
= 8;
730 /* The routines that read and process dies for a C struct or C++ class
731 pass lists of data member fields and lists of member function fields
732 in an instance of a field_info structure, as defined below. */
735 /* List of data member and baseclasses fields. */
738 struct nextfield
*next
;
743 *fields
, *baseclasses
;
745 /* Number of fields (including baseclasses). */
748 /* Number of baseclasses. */
751 /* Set if the accesibility of one of the fields is not public. */
752 int non_public_fields
;
754 /* Member function fields array, entries are allocated in the order they
755 are encountered in the object file. */
758 struct nextfnfield
*next
;
759 struct fn_field fnfield
;
763 /* Member function fieldlist array, contains name of possibly overloaded
764 member function, number of overloaded member functions and a pointer
765 to the head of the member function field chain. */
770 struct nextfnfield
*head
;
774 /* Number of entries in the fnfieldlists array. */
777 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
778 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
779 struct typedef_field_list
781 struct typedef_field field
;
782 struct typedef_field_list
*next
;
785 unsigned typedef_field_list_count
;
788 /* One item on the queue of compilation units to read in full symbols
790 struct dwarf2_queue_item
792 struct dwarf2_per_cu_data
*per_cu
;
793 struct dwarf2_queue_item
*next
;
796 /* The current queue. */
797 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
799 /* Loaded secondary compilation units are kept in memory until they
800 have not been referenced for the processing of this many
801 compilation units. Set this to zero to disable caching. Cache
802 sizes of up to at least twenty will improve startup time for
803 typical inter-CU-reference binaries, at an obvious memory cost. */
804 static int dwarf2_max_cache_age
= 5;
806 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
807 struct cmd_list_element
*c
, const char *value
)
809 fprintf_filtered (file
, _("\
810 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
815 /* Various complaints about symbol reading that don't abort the process */
818 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
820 complaint (&symfile_complaints
,
821 _("statement list doesn't fit in .debug_line section"));
825 dwarf2_debug_line_missing_file_complaint (void)
827 complaint (&symfile_complaints
,
828 _(".debug_line section has line data without a file"));
832 dwarf2_debug_line_missing_end_sequence_complaint (void)
834 complaint (&symfile_complaints
,
835 _(".debug_line section has line program sequence without an end"));
839 dwarf2_complex_location_expr_complaint (void)
841 complaint (&symfile_complaints
, _("location expression too complex"));
845 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
848 complaint (&symfile_complaints
,
849 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
854 dwarf2_macros_too_long_complaint (void)
856 complaint (&symfile_complaints
,
857 _("macro info runs off end of `.debug_macinfo' section"));
861 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
863 complaint (&symfile_complaints
,
864 _("macro debug info contains a malformed macro definition:\n`%s'"),
869 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
871 complaint (&symfile_complaints
,
872 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
875 /* local function prototypes */
877 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
879 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
882 static void dwarf2_build_psymtabs_hard (struct objfile
*);
884 static void scan_partial_symbols (struct partial_die_info
*,
885 CORE_ADDR
*, CORE_ADDR
*,
886 int, struct dwarf2_cu
*);
888 static void add_partial_symbol (struct partial_die_info
*,
891 static void add_partial_namespace (struct partial_die_info
*pdi
,
892 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
893 int need_pc
, struct dwarf2_cu
*cu
);
895 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
896 CORE_ADDR
*highpc
, int need_pc
,
897 struct dwarf2_cu
*cu
);
899 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
900 struct dwarf2_cu
*cu
);
902 static void add_partial_subprogram (struct partial_die_info
*pdi
,
903 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
904 int need_pc
, struct dwarf2_cu
*cu
);
906 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
907 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
908 bfd
*abfd
, struct dwarf2_cu
*cu
);
910 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
912 static void psymtab_to_symtab_1 (struct partial_symtab
*);
914 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
916 static void dwarf2_free_abbrev_table (void *);
918 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
921 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
924 static struct partial_die_info
*load_partial_dies (bfd
*,
925 gdb_byte
*, gdb_byte
*,
926 int, struct dwarf2_cu
*);
928 static gdb_byte
*read_partial_die (struct partial_die_info
*,
929 struct abbrev_info
*abbrev
,
931 gdb_byte
*, gdb_byte
*,
934 static struct partial_die_info
*find_partial_die (unsigned int,
937 static void fixup_partial_die (struct partial_die_info
*,
940 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
941 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
943 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
944 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
946 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
948 static int read_1_signed_byte (bfd
*, gdb_byte
*);
950 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
952 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
954 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
956 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
959 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
961 static LONGEST read_checked_initial_length_and_offset
962 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
963 unsigned int *, unsigned int *);
965 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
968 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
970 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
972 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
974 static char *read_indirect_string (bfd
*, gdb_byte
*,
975 const struct comp_unit_head
*,
978 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
980 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
982 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
984 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
986 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
989 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
993 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
994 struct dwarf2_cu
*cu
);
996 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
998 static struct die_info
*die_specification (struct die_info
*die
,
999 struct dwarf2_cu
**);
1001 static void free_line_header (struct line_header
*lh
);
1003 static void add_file_name (struct line_header
*, char *, unsigned int,
1004 unsigned int, unsigned int);
1006 static struct line_header
*(dwarf_decode_line_header
1007 (unsigned int offset
,
1008 bfd
*abfd
, struct dwarf2_cu
*cu
));
1010 static void dwarf_decode_lines (struct line_header
*, const char *, bfd
*,
1011 struct dwarf2_cu
*, struct partial_symtab
*);
1013 static void dwarf2_start_subfile (char *, const char *, const char *);
1015 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1016 struct dwarf2_cu
*);
1018 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1019 struct dwarf2_cu
*, struct symbol
*);
1021 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1022 struct dwarf2_cu
*);
1024 static void dwarf2_const_value_attr (struct attribute
*attr
,
1027 struct obstack
*obstack
,
1028 struct dwarf2_cu
*cu
, long *value
,
1030 struct dwarf2_locexpr_baton
**baton
);
1032 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1034 static int need_gnat_info (struct dwarf2_cu
*);
1036 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
1038 static void set_descriptive_type (struct type
*, struct die_info
*,
1039 struct dwarf2_cu
*);
1041 static struct type
*die_containing_type (struct die_info
*,
1042 struct dwarf2_cu
*);
1044 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1045 struct dwarf2_cu
*);
1047 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1049 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1051 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1053 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1054 const char *suffix
, int physname
,
1055 struct dwarf2_cu
*cu
);
1057 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1059 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1061 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1063 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1065 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1066 struct dwarf2_cu
*, struct partial_symtab
*);
1068 static int dwarf2_get_pc_bounds (struct die_info
*,
1069 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1070 struct partial_symtab
*);
1072 static void get_scope_pc_bounds (struct die_info
*,
1073 CORE_ADDR
*, CORE_ADDR
*,
1074 struct dwarf2_cu
*);
1076 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1077 CORE_ADDR
, struct dwarf2_cu
*);
1079 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1080 struct dwarf2_cu
*);
1082 static void dwarf2_attach_fields_to_type (struct field_info
*,
1083 struct type
*, struct dwarf2_cu
*);
1085 static void dwarf2_add_member_fn (struct field_info
*,
1086 struct die_info
*, struct type
*,
1087 struct dwarf2_cu
*);
1089 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1090 struct type
*, struct dwarf2_cu
*);
1092 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1094 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1096 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1098 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1100 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1102 static struct type
*read_module_type (struct die_info
*die
,
1103 struct dwarf2_cu
*cu
);
1105 static const char *namespace_name (struct die_info
*die
,
1106 int *is_anonymous
, struct dwarf2_cu
*);
1108 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1110 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1112 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1113 struct dwarf2_cu
*);
1115 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1117 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1119 gdb_byte
**new_info_ptr
,
1120 struct die_info
*parent
);
1122 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1124 gdb_byte
**new_info_ptr
,
1125 struct die_info
*parent
);
1127 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1129 gdb_byte
**new_info_ptr
,
1130 struct die_info
*parent
);
1132 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1133 struct die_info
**, gdb_byte
*,
1136 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1138 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1141 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1143 static const char *dwarf2_full_name (char *name
,
1144 struct die_info
*die
,
1145 struct dwarf2_cu
*cu
);
1147 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1148 struct dwarf2_cu
**);
1150 static char *dwarf_tag_name (unsigned int);
1152 static char *dwarf_attr_name (unsigned int);
1154 static char *dwarf_form_name (unsigned int);
1156 static char *dwarf_bool_name (unsigned int);
1158 static char *dwarf_type_encoding_name (unsigned int);
1161 static char *dwarf_cfi_name (unsigned int);
1164 static struct die_info
*sibling_die (struct die_info
*);
1166 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1168 static void dump_die_for_error (struct die_info
*);
1170 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1173 /*static*/ void dump_die (struct die_info
*, int max_level
);
1175 static void store_in_ref_table (struct die_info
*,
1176 struct dwarf2_cu
*);
1178 static int is_ref_attr (struct attribute
*);
1180 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1182 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1184 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1186 struct dwarf2_cu
**);
1188 static struct die_info
*follow_die_ref (struct die_info
*,
1190 struct dwarf2_cu
**);
1192 static struct die_info
*follow_die_sig (struct die_info
*,
1194 struct dwarf2_cu
**);
1196 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1197 unsigned int offset
);
1199 static void read_signatured_type (struct objfile
*,
1200 struct signatured_type
*type_sig
);
1202 /* memory allocation interface */
1204 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1206 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1208 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1210 static void initialize_cu_func_list (struct dwarf2_cu
*);
1212 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1213 struct dwarf2_cu
*);
1215 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1216 char *, bfd
*, struct dwarf2_cu
*);
1218 static int attr_form_is_block (struct attribute
*);
1220 static int attr_form_is_section_offset (struct attribute
*);
1222 static int attr_form_is_constant (struct attribute
*);
1224 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1225 struct dwarf2_loclist_baton
*baton
,
1226 struct attribute
*attr
);
1228 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1230 struct dwarf2_cu
*cu
);
1232 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1233 struct abbrev_info
*abbrev
,
1234 struct dwarf2_cu
*cu
);
1236 static void free_stack_comp_unit (void *);
1238 static hashval_t
partial_die_hash (const void *item
);
1240 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1242 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1243 (unsigned int offset
, struct objfile
*objfile
);
1245 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1246 (unsigned int offset
, struct objfile
*objfile
);
1248 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1249 struct objfile
*objfile
);
1251 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1252 struct die_info
*comp_unit_die
);
1254 static void free_one_comp_unit (void *);
1256 static void free_cached_comp_units (void *);
1258 static void age_cached_comp_units (void);
1260 static void free_one_cached_comp_unit (void *);
1262 static struct type
*set_die_type (struct die_info
*, struct type
*,
1263 struct dwarf2_cu
*);
1265 static void create_all_comp_units (struct objfile
*);
1267 static int create_debug_types_hash_table (struct objfile
*objfile
);
1269 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1272 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1274 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1275 struct dwarf2_per_cu_data
*);
1277 static void dwarf2_mark (struct dwarf2_cu
*);
1279 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1281 static struct type
*get_die_type_at_offset (unsigned int,
1282 struct dwarf2_per_cu_data
*per_cu
);
1284 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1286 static void dwarf2_release_queue (void *dummy
);
1288 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1289 struct objfile
*objfile
);
1291 static void process_queue (struct objfile
*objfile
);
1293 static void find_file_and_directory (struct die_info
*die
,
1294 struct dwarf2_cu
*cu
,
1295 char **name
, char **comp_dir
);
1297 static char *file_full_name (int file
, struct line_header
*lh
,
1298 const char *comp_dir
);
1300 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1303 unsigned int buffer_size
,
1306 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1307 struct dwarf2_cu
*cu
);
1309 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1313 /* Convert VALUE between big- and little-endian. */
1315 byte_swap (offset_type value
)
1319 result
= (value
& 0xff) << 24;
1320 result
|= (value
& 0xff00) << 8;
1321 result
|= (value
& 0xff0000) >> 8;
1322 result
|= (value
& 0xff000000) >> 24;
1326 #define MAYBE_SWAP(V) byte_swap (V)
1329 #define MAYBE_SWAP(V) (V)
1330 #endif /* WORDS_BIGENDIAN */
1332 /* The suffix for an index file. */
1333 #define INDEX_SUFFIX ".gdb-index"
1335 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1336 struct dwarf2_cu
*cu
);
1338 /* Try to locate the sections we need for DWARF 2 debugging
1339 information and return true if we have enough to do something. */
1342 dwarf2_has_info (struct objfile
*objfile
)
1344 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1345 if (!dwarf2_per_objfile
)
1347 /* Initialize per-objfile state. */
1348 struct dwarf2_per_objfile
*data
1349 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1351 memset (data
, 0, sizeof (*data
));
1352 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1353 dwarf2_per_objfile
= data
;
1355 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1356 dwarf2_per_objfile
->objfile
= objfile
;
1358 return (dwarf2_per_objfile
->info
.asection
!= NULL
1359 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1362 /* When loading sections, we can either look for ".<name>", or for
1363 * ".z<name>", which indicates a compressed section. */
1366 section_is_p (const char *section_name
, const char *name
)
1368 return (section_name
[0] == '.'
1369 && (strcmp (section_name
+ 1, name
) == 0
1370 || (section_name
[1] == 'z'
1371 && strcmp (section_name
+ 2, name
) == 0)));
1374 /* This function is mapped across the sections and remembers the
1375 offset and size of each of the debugging sections we are interested
1379 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1381 if (section_is_p (sectp
->name
, INFO_SECTION
))
1383 dwarf2_per_objfile
->info
.asection
= sectp
;
1384 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1386 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1388 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1389 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1391 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1393 dwarf2_per_objfile
->line
.asection
= sectp
;
1394 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1396 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1398 dwarf2_per_objfile
->loc
.asection
= sectp
;
1399 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1401 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1403 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1404 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1406 else if (section_is_p (sectp
->name
, STR_SECTION
))
1408 dwarf2_per_objfile
->str
.asection
= sectp
;
1409 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1411 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1413 dwarf2_per_objfile
->frame
.asection
= sectp
;
1414 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1416 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1418 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1420 if (aflag
& SEC_HAS_CONTENTS
)
1422 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1423 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1426 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1428 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1429 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1431 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1433 dwarf2_per_objfile
->types
.asection
= sectp
;
1434 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1436 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1438 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1439 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1442 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1443 && bfd_section_vma (abfd
, sectp
) == 0)
1444 dwarf2_per_objfile
->has_section_at_zero
= 1;
1447 /* Decompress a section that was compressed using zlib. Store the
1448 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1451 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1452 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1454 bfd
*abfd
= objfile
->obfd
;
1456 error (_("Support for zlib-compressed DWARF data (from '%s') "
1457 "is disabled in this copy of GDB"),
1458 bfd_get_filename (abfd
));
1460 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1461 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1462 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1463 bfd_size_type uncompressed_size
;
1464 gdb_byte
*uncompressed_buffer
;
1467 int header_size
= 12;
1469 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1470 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1471 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1472 bfd_get_filename (abfd
));
1474 /* Read the zlib header. In this case, it should be "ZLIB" followed
1475 by the uncompressed section size, 8 bytes in big-endian order. */
1476 if (compressed_size
< header_size
1477 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1478 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1479 bfd_get_filename (abfd
));
1480 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1481 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1482 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1483 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1484 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1485 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1486 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1487 uncompressed_size
+= compressed_buffer
[11];
1489 /* It is possible the section consists of several compressed
1490 buffers concatenated together, so we uncompress in a loop. */
1494 strm
.avail_in
= compressed_size
- header_size
;
1495 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1496 strm
.avail_out
= uncompressed_size
;
1497 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1499 rc
= inflateInit (&strm
);
1500 while (strm
.avail_in
> 0)
1503 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1504 bfd_get_filename (abfd
), rc
);
1505 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1506 + (uncompressed_size
- strm
.avail_out
));
1507 rc
= inflate (&strm
, Z_FINISH
);
1508 if (rc
!= Z_STREAM_END
)
1509 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1510 bfd_get_filename (abfd
), rc
);
1511 rc
= inflateReset (&strm
);
1513 rc
= inflateEnd (&strm
);
1515 || strm
.avail_out
!= 0)
1516 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1517 bfd_get_filename (abfd
), rc
);
1519 do_cleanups (cleanup
);
1520 *outbuf
= uncompressed_buffer
;
1521 *outsize
= uncompressed_size
;
1525 /* Read the contents of the section SECTP from object file specified by
1526 OBJFILE, store info about the section into INFO.
1527 If the section is compressed, uncompress it before returning. */
1530 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1532 bfd
*abfd
= objfile
->obfd
;
1533 asection
*sectp
= info
->asection
;
1534 gdb_byte
*buf
, *retbuf
;
1535 unsigned char header
[4];
1539 info
->buffer
= NULL
;
1540 info
->was_mmapped
= 0;
1543 if (info
->asection
== NULL
|| info
->size
== 0)
1546 /* Check if the file has a 4-byte header indicating compression. */
1547 if (info
->size
> sizeof (header
)
1548 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1549 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1551 /* Upon decompression, update the buffer and its size. */
1552 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1554 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1562 pagesize
= getpagesize ();
1564 /* Only try to mmap sections which are large enough: we don't want to
1565 waste space due to fragmentation. Also, only try mmap for sections
1566 without relocations. */
1568 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1570 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1571 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1572 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1573 MAP_PRIVATE
, pg_offset
);
1575 if (retbuf
!= MAP_FAILED
)
1577 info
->was_mmapped
= 1;
1578 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1579 #if HAVE_POSIX_MADVISE
1580 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1587 /* If we get here, we are a normal, not-compressed section. */
1589 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1591 /* When debugging .o files, we may need to apply relocations; see
1592 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1593 We never compress sections in .o files, so we only need to
1594 try this when the section is not compressed. */
1595 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1598 info
->buffer
= retbuf
;
1602 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1603 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1604 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1605 bfd_get_filename (abfd
));
1608 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1612 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1613 asection
**sectp
, gdb_byte
**bufp
,
1614 bfd_size_type
*sizep
)
1616 struct dwarf2_per_objfile
*data
1617 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1618 struct dwarf2_section_info
*info
;
1620 /* We may see an objfile without any DWARF, in which case we just
1629 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1630 info
= &data
->eh_frame
;
1631 else if (section_is_p (section_name
, FRAME_SECTION
))
1632 info
= &data
->frame
;
1634 gdb_assert_not_reached ("unexpected section");
1636 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1637 /* We haven't read this section in yet. Do it now. */
1638 dwarf2_read_section (objfile
, info
);
1640 *sectp
= info
->asection
;
1641 *bufp
= info
->buffer
;
1642 *sizep
= info
->size
;
1647 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1651 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1652 struct dwarf2_per_cu_data
*per_cu
)
1654 struct cleanup
*back_to
;
1656 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1658 queue_comp_unit (per_cu
, objfile
);
1660 if (per_cu
->from_debug_types
)
1661 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1663 load_full_comp_unit (per_cu
, objfile
);
1665 process_queue (objfile
);
1667 /* Age the cache, releasing compilation units that have not
1668 been used recently. */
1669 age_cached_comp_units ();
1671 do_cleanups (back_to
);
1674 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1675 the objfile from which this CU came. Returns the resulting symbol
1678 static struct symtab
*
1679 dw2_instantiate_symtab (struct objfile
*objfile
,
1680 struct dwarf2_per_cu_data
*per_cu
)
1682 if (!per_cu
->v
.quick
->symtab
)
1684 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1685 increment_reading_symtab ();
1686 dw2_do_instantiate_symtab (objfile
, per_cu
);
1687 do_cleanups (back_to
);
1689 return per_cu
->v
.quick
->symtab
;
1692 /* Return the CU given its index. */
1694 static struct dwarf2_per_cu_data
*
1695 dw2_get_cu (int index
)
1697 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1699 index
-= dwarf2_per_objfile
->n_comp_units
;
1700 return dwarf2_per_objfile
->type_comp_units
[index
];
1702 return dwarf2_per_objfile
->all_comp_units
[index
];
1705 /* A helper function that knows how to read a 64-bit value in a way
1706 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1710 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1712 if (sizeof (ULONGEST
) < 8)
1716 /* Ignore the upper 4 bytes if they are all zero. */
1717 for (i
= 0; i
< 4; ++i
)
1718 if (bytes
[i
+ 4] != 0)
1721 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1724 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1728 /* Read the CU list from the mapped index, and use it to create all
1729 the CU objects for this objfile. Return 0 if something went wrong,
1730 1 if everything went ok. */
1733 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1734 offset_type cu_list_elements
)
1738 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1739 dwarf2_per_objfile
->all_comp_units
1740 = obstack_alloc (&objfile
->objfile_obstack
,
1741 dwarf2_per_objfile
->n_comp_units
1742 * sizeof (struct dwarf2_per_cu_data
*));
1744 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1746 struct dwarf2_per_cu_data
*the_cu
;
1747 ULONGEST offset
, length
;
1749 if (!extract_cu_value (cu_list
, &offset
)
1750 || !extract_cu_value (cu_list
+ 8, &length
))
1754 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1755 struct dwarf2_per_cu_data
);
1756 the_cu
->offset
= offset
;
1757 the_cu
->length
= length
;
1758 the_cu
->objfile
= objfile
;
1759 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1760 struct dwarf2_per_cu_quick_data
);
1761 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1767 /* Create the signatured type hash table from the index. */
1770 create_signatured_type_table_from_index (struct objfile
*objfile
,
1771 const gdb_byte
*bytes
,
1772 offset_type elements
)
1775 htab_t sig_types_hash
;
1777 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1778 dwarf2_per_objfile
->type_comp_units
1779 = obstack_alloc (&objfile
->objfile_obstack
,
1780 dwarf2_per_objfile
->n_type_comp_units
1781 * sizeof (struct dwarf2_per_cu_data
*));
1783 sig_types_hash
= allocate_signatured_type_table (objfile
);
1785 for (i
= 0; i
< elements
; i
+= 3)
1787 struct signatured_type
*type_sig
;
1788 ULONGEST offset
, type_offset
, signature
;
1791 if (!extract_cu_value (bytes
, &offset
)
1792 || !extract_cu_value (bytes
+ 8, &type_offset
))
1794 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1797 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1798 struct signatured_type
);
1799 type_sig
->signature
= signature
;
1800 type_sig
->offset
= offset
;
1801 type_sig
->type_offset
= type_offset
;
1802 type_sig
->per_cu
.from_debug_types
= 1;
1803 type_sig
->per_cu
.offset
= offset
;
1804 type_sig
->per_cu
.objfile
= objfile
;
1805 type_sig
->per_cu
.v
.quick
1806 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1807 struct dwarf2_per_cu_quick_data
);
1809 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1812 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1815 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1820 /* Read the address map data from the mapped index, and use it to
1821 populate the objfile's psymtabs_addrmap. */
1824 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1826 const gdb_byte
*iter
, *end
;
1827 struct obstack temp_obstack
;
1828 struct addrmap
*mutable_map
;
1829 struct cleanup
*cleanup
;
1832 obstack_init (&temp_obstack
);
1833 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1834 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1836 iter
= index
->address_table
;
1837 end
= iter
+ index
->address_table_size
;
1839 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1843 ULONGEST hi
, lo
, cu_index
;
1844 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1846 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1848 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1851 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1852 dw2_get_cu (cu_index
));
1855 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1856 &objfile
->objfile_obstack
);
1857 do_cleanups (cleanup
);
1860 /* The hash function for strings in the mapped index. This is the
1861 same as the hashtab.c hash function, but we keep a separate copy to
1862 maintain control over the implementation. This is necessary
1863 because the hash function is tied to the format of the mapped index
1867 mapped_index_string_hash (const void *p
)
1869 const unsigned char *str
= (const unsigned char *) p
;
1873 while ((c
= *str
++) != 0)
1874 r
= r
* 67 + c
- 113;
1879 /* Find a slot in the mapped index INDEX for the object named NAME.
1880 If NAME is found, set *VEC_OUT to point to the CU vector in the
1881 constant pool and return 1. If NAME cannot be found, return 0. */
1884 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1885 offset_type
**vec_out
)
1887 offset_type hash
= mapped_index_string_hash (name
);
1888 offset_type slot
, step
;
1890 slot
= hash
& (index
->symbol_table_slots
- 1);
1891 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
1895 /* Convert a slot number to an offset into the table. */
1896 offset_type i
= 2 * slot
;
1898 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
1901 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
1902 if (!strcmp (name
, str
))
1904 *vec_out
= (offset_type
*) (index
->constant_pool
1905 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
1909 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
1913 /* Read the index file. If everything went ok, initialize the "quick"
1914 elements of all the CUs and return 1. Otherwise, return 0. */
1917 dwarf2_read_index (struct objfile
*objfile
)
1920 struct mapped_index
*map
;
1921 offset_type
*metadata
;
1922 const gdb_byte
*cu_list
;
1923 const gdb_byte
*types_list
= NULL
;
1924 offset_type version
, cu_list_elements
;
1925 offset_type types_list_elements
= 0;
1928 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
1929 || dwarf2_per_objfile
->gdb_index
.size
== 0)
1932 /* Older elfutils strip versions could keep the section in the main
1933 executable while splitting it for the separate debug info file. */
1934 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
1935 & SEC_HAS_CONTENTS
) == 0)
1938 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1940 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1941 /* Version check. */
1942 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1943 /* Versions earlier than 3 emitted every copy of a psymbol. This
1944 causes the index to behave very poorly for certain requests. So,
1945 it seems better to just ignore such indices. */
1948 /* Indexes with higher version than the one supported by GDB may be no
1949 longer backward compatible. */
1953 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1954 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1956 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1959 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1960 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1964 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1965 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1966 - MAYBE_SWAP (metadata
[i
]))
1970 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1971 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1972 - MAYBE_SWAP (metadata
[i
]));
1975 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1976 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1977 - MAYBE_SWAP (metadata
[i
]))
1978 / (2 * sizeof (offset_type
)));
1981 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1983 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1986 if (types_list_elements
1987 && !create_signatured_type_table_from_index (objfile
, types_list
,
1988 types_list_elements
))
1991 create_addrmap_from_index (objfile
, map
);
1993 dwarf2_per_objfile
->index_table
= map
;
1994 dwarf2_per_objfile
->using_index
= 1;
1999 /* A helper for the "quick" functions which sets the global
2000 dwarf2_per_objfile according to OBJFILE. */
2003 dw2_setup (struct objfile
*objfile
)
2005 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2006 gdb_assert (dwarf2_per_objfile
);
2009 /* A helper for the "quick" functions which attempts to read the line
2010 table for THIS_CU. */
2013 dw2_require_line_header (struct objfile
*objfile
,
2014 struct dwarf2_per_cu_data
*this_cu
)
2016 bfd
*abfd
= objfile
->obfd
;
2017 struct line_header
*lh
= NULL
;
2018 struct attribute
*attr
;
2019 struct cleanup
*cleanups
;
2020 struct die_info
*comp_unit_die
;
2021 struct dwarf2_section_info
* sec
;
2022 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2023 int has_children
, i
;
2024 struct dwarf2_cu cu
;
2025 unsigned int bytes_read
, buffer_size
;
2026 struct die_reader_specs reader_specs
;
2027 char *name
, *comp_dir
;
2029 if (this_cu
->v
.quick
->read_lines
)
2031 this_cu
->v
.quick
->read_lines
= 1;
2033 init_one_comp_unit (&cu
, objfile
);
2034 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2036 if (this_cu
->from_debug_types
)
2037 sec
= &dwarf2_per_objfile
->types
;
2039 sec
= &dwarf2_per_objfile
->info
;
2040 dwarf2_read_section (objfile
, sec
);
2041 buffer_size
= sec
->size
;
2042 buffer
= sec
->buffer
;
2043 info_ptr
= buffer
+ this_cu
->offset
;
2044 beg_of_comp_unit
= info_ptr
;
2046 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2047 buffer
, buffer_size
,
2050 /* Complete the cu_header. */
2051 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2052 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2055 cu
.per_cu
= this_cu
;
2057 dwarf2_read_abbrevs (abfd
, &cu
);
2058 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2060 if (this_cu
->from_debug_types
)
2061 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2062 init_cu_die_reader (&reader_specs
, &cu
);
2063 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2066 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2069 unsigned int line_offset
= DW_UNSND (attr
);
2070 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2074 do_cleanups (cleanups
);
2078 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2080 this_cu
->v
.quick
->lines
= lh
;
2082 this_cu
->v
.quick
->file_names
2083 = obstack_alloc (&objfile
->objfile_obstack
,
2084 lh
->num_file_names
* sizeof (char *));
2085 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2086 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2088 do_cleanups (cleanups
);
2091 /* A helper for the "quick" functions which computes and caches the
2092 real path for a given file name from the line table.
2093 dw2_require_line_header must have been called before this is
2097 dw2_require_full_path (struct objfile
*objfile
,
2098 struct dwarf2_per_cu_data
*per_cu
,
2101 if (!per_cu
->v
.quick
->full_names
)
2102 per_cu
->v
.quick
->full_names
2103 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2104 per_cu
->v
.quick
->lines
->num_file_names
,
2107 if (!per_cu
->v
.quick
->full_names
[index
])
2108 per_cu
->v
.quick
->full_names
[index
]
2109 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2111 return per_cu
->v
.quick
->full_names
[index
];
2114 static struct symtab
*
2115 dw2_find_last_source_symtab (struct objfile
*objfile
)
2118 dw2_setup (objfile
);
2119 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2120 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2124 dw2_forget_cached_source_info (struct objfile
*objfile
)
2128 dw2_setup (objfile
);
2129 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2130 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2132 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2134 if (per_cu
->v
.quick
->full_names
)
2138 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2140 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2141 per_cu
->v
.quick
->full_names
[j
] = NULL
;
2148 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2149 const char *full_path
, const char *real_path
,
2150 struct symtab
**result
)
2153 int check_basename
= lbasename (name
) == name
;
2154 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2156 dw2_setup (objfile
);
2157 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2158 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2161 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2163 if (per_cu
->v
.quick
->symtab
)
2166 dw2_require_line_header (objfile
, per_cu
);
2167 if (!per_cu
->v
.quick
->lines
)
2170 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2172 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2174 if (FILENAME_CMP (name
, this_name
) == 0)
2176 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2180 if (check_basename
&& ! base_cu
2181 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2184 if (full_path
!= NULL
)
2186 const char *this_full_name
= dw2_require_full_path (objfile
,
2190 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2192 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2197 if (real_path
!= NULL
)
2199 const char *this_full_name
= dw2_require_full_path (objfile
,
2202 if (this_full_name
!= NULL
2203 && FILENAME_CMP (real_path
, this_full_name
) == 0)
2205 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2214 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2221 static struct symtab
*
2222 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2223 const char *name
, domain_enum domain
)
2225 /* We do all the work in the pre_expand_symtabs_matching hook
2230 /* A helper function that expands all symtabs that hold an object
2234 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2236 dw2_setup (objfile
);
2238 if (dwarf2_per_objfile
->index_table
)
2242 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2245 offset_type i
, len
= MAYBE_SWAP (*vec
);
2246 for (i
= 0; i
< len
; ++i
)
2248 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2249 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2251 dw2_instantiate_symtab (objfile
, per_cu
);
2258 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2259 int kind
, const char *name
,
2262 dw2_do_expand_symtabs_matching (objfile
, name
);
2266 dw2_print_stats (struct objfile
*objfile
)
2270 dw2_setup (objfile
);
2272 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2273 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2275 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2277 if (!per_cu
->v
.quick
->symtab
)
2280 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2284 dw2_dump (struct objfile
*objfile
)
2286 /* Nothing worth printing. */
2290 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2291 struct section_offsets
*delta
)
2293 /* There's nothing to relocate here. */
2297 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2298 const char *func_name
)
2300 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2304 dw2_expand_all_symtabs (struct objfile
*objfile
)
2308 dw2_setup (objfile
);
2310 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2311 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2313 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2315 dw2_instantiate_symtab (objfile
, per_cu
);
2320 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2321 const char *filename
)
2325 dw2_setup (objfile
);
2327 /* We don't need to consider type units here.
2328 This is only called for examining code, e.g. expand_line_sal.
2329 There can be an order of magnitude (or more) more type units
2330 than comp units, and we avoid them if we can. */
2332 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2335 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2337 if (per_cu
->v
.quick
->symtab
)
2340 dw2_require_line_header (objfile
, per_cu
);
2341 if (!per_cu
->v
.quick
->lines
)
2344 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2346 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2347 if (FILENAME_CMP (this_name
, filename
) == 0)
2349 dw2_instantiate_symtab (objfile
, per_cu
);
2357 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2359 struct dwarf2_per_cu_data
*per_cu
;
2362 dw2_setup (objfile
);
2364 if (!dwarf2_per_objfile
->index_table
)
2367 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2371 /* Note that this just looks at the very first one named NAME -- but
2372 actually we are looking for a function. find_main_filename
2373 should be rewritten so that it doesn't require a custom hook. It
2374 could just use the ordinary symbol tables. */
2375 /* vec[0] is the length, which must always be >0. */
2376 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2378 dw2_require_line_header (objfile
, per_cu
);
2379 if (!per_cu
->v
.quick
->lines
)
2382 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2386 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2387 struct objfile
*objfile
, int global
,
2388 int (*callback
) (struct block
*,
2389 struct symbol
*, void *),
2390 void *data
, symbol_compare_ftype
*match
,
2391 symbol_compare_ftype
*ordered_compare
)
2393 /* Currently unimplemented; used for Ada. The function can be called if the
2394 current language is Ada for a non-Ada objfile using GNU index. As Ada
2395 does not look for non-Ada symbols this function should just return. */
2399 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2400 int (*file_matcher
) (const char *, void *),
2401 int (*name_matcher
) (const char *, void *),
2407 struct mapped_index
*index
;
2409 dw2_setup (objfile
);
2410 if (!dwarf2_per_objfile
->index_table
)
2412 index
= dwarf2_per_objfile
->index_table
;
2414 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2415 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2418 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2420 per_cu
->v
.quick
->mark
= 0;
2421 if (per_cu
->v
.quick
->symtab
)
2424 dw2_require_line_header (objfile
, per_cu
);
2425 if (!per_cu
->v
.quick
->lines
)
2428 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2430 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2432 per_cu
->v
.quick
->mark
= 1;
2438 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2440 offset_type idx
= 2 * iter
;
2442 offset_type
*vec
, vec_len
, vec_idx
;
2444 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2447 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2449 if (! (*name_matcher
) (name
, data
))
2452 /* The name was matched, now expand corresponding CUs that were
2454 vec
= (offset_type
*) (index
->constant_pool
2455 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2456 vec_len
= MAYBE_SWAP (vec
[0]);
2457 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2459 struct dwarf2_per_cu_data
*per_cu
;
2461 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2462 if (per_cu
->v
.quick
->mark
)
2463 dw2_instantiate_symtab (objfile
, per_cu
);
2468 static struct symtab
*
2469 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2470 struct minimal_symbol
*msymbol
,
2472 struct obj_section
*section
,
2475 struct dwarf2_per_cu_data
*data
;
2477 dw2_setup (objfile
);
2479 if (!objfile
->psymtabs_addrmap
)
2482 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2486 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2487 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2488 paddress (get_objfile_arch (objfile
), pc
));
2490 return dw2_instantiate_symtab (objfile
, data
);
2494 dw2_map_symbol_names (struct objfile
*objfile
,
2495 void (*fun
) (const char *, void *),
2499 struct mapped_index
*index
;
2501 dw2_setup (objfile
);
2503 if (!dwarf2_per_objfile
->index_table
)
2505 index
= dwarf2_per_objfile
->index_table
;
2507 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2509 offset_type idx
= 2 * iter
;
2511 offset_type
*vec
, vec_len
, vec_idx
;
2513 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2516 name
= (index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]));
2518 (*fun
) (name
, data
);
2523 dw2_map_symbol_filenames (struct objfile
*objfile
,
2524 void (*fun
) (const char *, const char *, void *),
2529 dw2_setup (objfile
);
2530 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2531 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2534 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2536 if (per_cu
->v
.quick
->symtab
)
2539 dw2_require_line_header (objfile
, per_cu
);
2540 if (!per_cu
->v
.quick
->lines
)
2543 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2545 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2547 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2553 dw2_has_symbols (struct objfile
*objfile
)
2558 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2561 dw2_find_last_source_symtab
,
2562 dw2_forget_cached_source_info
,
2565 dw2_pre_expand_symtabs_matching
,
2569 dw2_expand_symtabs_for_function
,
2570 dw2_expand_all_symtabs
,
2571 dw2_expand_symtabs_with_filename
,
2572 dw2_find_symbol_file
,
2573 dw2_map_matching_symbols
,
2574 dw2_expand_symtabs_matching
,
2575 dw2_find_pc_sect_symtab
,
2576 dw2_map_symbol_names
,
2577 dw2_map_symbol_filenames
2580 /* Initialize for reading DWARF for this objfile. Return 0 if this
2581 file will use psymtabs, or 1 if using the GNU index. */
2584 dwarf2_initialize_objfile (struct objfile
*objfile
)
2586 /* If we're about to read full symbols, don't bother with the
2587 indices. In this case we also don't care if some other debug
2588 format is making psymtabs, because they are all about to be
2590 if ((objfile
->flags
& OBJF_READNOW
))
2594 dwarf2_per_objfile
->using_index
= 1;
2595 create_all_comp_units (objfile
);
2596 create_debug_types_hash_table (objfile
);
2598 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2599 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2601 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2603 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2604 struct dwarf2_per_cu_quick_data
);
2607 /* Return 1 so that gdb sees the "quick" functions. However,
2608 these functions will be no-ops because we will have expanded
2613 if (dwarf2_read_index (objfile
))
2616 dwarf2_build_psymtabs (objfile
);
2622 /* Build a partial symbol table. */
2625 dwarf2_build_psymtabs (struct objfile
*objfile
)
2627 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2629 init_psymbol_list (objfile
, 1024);
2632 dwarf2_build_psymtabs_hard (objfile
);
2635 /* Return TRUE if OFFSET is within CU_HEADER. */
2638 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2640 unsigned int bottom
= cu_header
->offset
;
2641 unsigned int top
= (cu_header
->offset
2643 + cu_header
->initial_length_size
);
2645 return (offset
>= bottom
&& offset
< top
);
2648 /* Read in the comp unit header information from the debug_info at info_ptr.
2649 NOTE: This leaves members offset, first_die_offset to be filled in
2653 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2654 gdb_byte
*info_ptr
, bfd
*abfd
)
2657 unsigned int bytes_read
;
2659 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2660 cu_header
->initial_length_size
= bytes_read
;
2661 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2662 info_ptr
+= bytes_read
;
2663 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2665 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2667 info_ptr
+= bytes_read
;
2668 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2670 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2671 if (signed_addr
< 0)
2672 internal_error (__FILE__
, __LINE__
,
2673 _("read_comp_unit_head: dwarf from non elf file"));
2674 cu_header
->signed_addr_p
= signed_addr
;
2680 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2681 gdb_byte
*buffer
, unsigned int buffer_size
,
2684 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2686 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2688 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2689 error (_("Dwarf Error: wrong version in compilation unit header "
2690 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2691 bfd_get_filename (abfd
));
2693 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2694 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2695 "(offset 0x%lx + 6) [in module %s]"),
2696 (long) header
->abbrev_offset
,
2697 (long) (beg_of_comp_unit
- buffer
),
2698 bfd_get_filename (abfd
));
2700 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2701 > buffer
+ buffer_size
)
2702 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2703 "(offset 0x%lx + 0) [in module %s]"),
2704 (long) header
->length
,
2705 (long) (beg_of_comp_unit
- buffer
),
2706 bfd_get_filename (abfd
));
2711 /* Read in the types comp unit header information from .debug_types entry at
2712 types_ptr. The result is a pointer to one past the end of the header. */
2715 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2716 ULONGEST
*signature
,
2717 gdb_byte
*types_ptr
, bfd
*abfd
)
2719 gdb_byte
*initial_types_ptr
= types_ptr
;
2721 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2722 &dwarf2_per_objfile
->types
);
2723 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2725 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2727 *signature
= read_8_bytes (abfd
, types_ptr
);
2729 types_ptr
+= cu_header
->offset_size
;
2730 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2735 /* Allocate a new partial symtab for file named NAME and mark this new
2736 partial symtab as being an include of PST. */
2739 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2740 struct objfile
*objfile
)
2742 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2744 subpst
->section_offsets
= pst
->section_offsets
;
2745 subpst
->textlow
= 0;
2746 subpst
->texthigh
= 0;
2748 subpst
->dependencies
= (struct partial_symtab
**)
2749 obstack_alloc (&objfile
->objfile_obstack
,
2750 sizeof (struct partial_symtab
*));
2751 subpst
->dependencies
[0] = pst
;
2752 subpst
->number_of_dependencies
= 1;
2754 subpst
->globals_offset
= 0;
2755 subpst
->n_global_syms
= 0;
2756 subpst
->statics_offset
= 0;
2757 subpst
->n_static_syms
= 0;
2758 subpst
->symtab
= NULL
;
2759 subpst
->read_symtab
= pst
->read_symtab
;
2762 /* No private part is necessary for include psymtabs. This property
2763 can be used to differentiate between such include psymtabs and
2764 the regular ones. */
2765 subpst
->read_symtab_private
= NULL
;
2768 /* Read the Line Number Program data and extract the list of files
2769 included by the source file represented by PST. Build an include
2770 partial symtab for each of these included files. */
2773 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2774 struct die_info
*die
,
2775 struct partial_symtab
*pst
)
2777 struct objfile
*objfile
= cu
->objfile
;
2778 bfd
*abfd
= objfile
->obfd
;
2779 struct line_header
*lh
= NULL
;
2780 struct attribute
*attr
;
2782 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2785 unsigned int line_offset
= DW_UNSND (attr
);
2787 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2790 return; /* No linetable, so no includes. */
2792 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2793 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2795 free_line_header (lh
);
2799 hash_type_signature (const void *item
)
2801 const struct signatured_type
*type_sig
= item
;
2803 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2804 return type_sig
->signature
;
2808 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2810 const struct signatured_type
*lhs
= item_lhs
;
2811 const struct signatured_type
*rhs
= item_rhs
;
2813 return lhs
->signature
== rhs
->signature
;
2816 /* Allocate a hash table for signatured types. */
2819 allocate_signatured_type_table (struct objfile
*objfile
)
2821 return htab_create_alloc_ex (41,
2822 hash_type_signature
,
2825 &objfile
->objfile_obstack
,
2826 hashtab_obstack_allocate
,
2827 dummy_obstack_deallocate
);
2830 /* A helper function to add a signatured type CU to a list. */
2833 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2835 struct signatured_type
*sigt
= *slot
;
2836 struct dwarf2_per_cu_data
***datap
= datum
;
2838 **datap
= &sigt
->per_cu
;
2844 /* Create the hash table of all entries in the .debug_types section.
2845 The result is zero if there is an error (e.g. missing .debug_types section),
2846 otherwise non-zero. */
2849 create_debug_types_hash_table (struct objfile
*objfile
)
2853 struct dwarf2_per_cu_data
**iter
;
2855 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2856 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2858 if (info_ptr
== NULL
)
2860 dwarf2_per_objfile
->signatured_types
= NULL
;
2864 types_htab
= allocate_signatured_type_table (objfile
);
2866 if (dwarf2_die_debug
)
2867 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2869 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2871 unsigned int offset
;
2872 unsigned int offset_size
;
2873 unsigned int type_offset
;
2874 unsigned int length
, initial_length_size
;
2875 unsigned short version
;
2877 struct signatured_type
*type_sig
;
2879 gdb_byte
*ptr
= info_ptr
;
2881 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2883 /* We need to read the type's signature in order to build the hash
2884 table, but we don't need to read anything else just yet. */
2886 /* Sanity check to ensure entire cu is present. */
2887 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2888 if (ptr
+ length
+ initial_length_size
2889 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2891 complaint (&symfile_complaints
,
2892 _("debug type entry runs off end of `.debug_types' section, ignored"));
2896 offset_size
= initial_length_size
== 4 ? 4 : 8;
2897 ptr
+= initial_length_size
;
2898 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2900 ptr
+= offset_size
; /* abbrev offset */
2901 ptr
+= 1; /* address size */
2902 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2904 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2906 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2907 memset (type_sig
, 0, sizeof (*type_sig
));
2908 type_sig
->signature
= signature
;
2909 type_sig
->offset
= offset
;
2910 type_sig
->type_offset
= type_offset
;
2911 type_sig
->per_cu
.objfile
= objfile
;
2912 type_sig
->per_cu
.from_debug_types
= 1;
2914 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2915 gdb_assert (slot
!= NULL
);
2918 if (dwarf2_die_debug
)
2919 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2920 offset
, phex (signature
, sizeof (signature
)));
2922 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2925 dwarf2_per_objfile
->signatured_types
= types_htab
;
2927 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2928 dwarf2_per_objfile
->type_comp_units
2929 = obstack_alloc (&objfile
->objfile_obstack
,
2930 dwarf2_per_objfile
->n_type_comp_units
2931 * sizeof (struct dwarf2_per_cu_data
*));
2932 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2933 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2934 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2935 == dwarf2_per_objfile
->n_type_comp_units
);
2940 /* Lookup a signature based type.
2941 Returns NULL if SIG is not present in the table. */
2943 static struct signatured_type
*
2944 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2946 struct signatured_type find_entry
, *entry
;
2948 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2950 complaint (&symfile_complaints
,
2951 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2955 find_entry
.signature
= sig
;
2956 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2960 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2963 init_cu_die_reader (struct die_reader_specs
*reader
,
2964 struct dwarf2_cu
*cu
)
2966 reader
->abfd
= cu
->objfile
->obfd
;
2968 if (cu
->per_cu
->from_debug_types
)
2970 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2971 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2975 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2976 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2980 /* Find the base address of the compilation unit for range lists and
2981 location lists. It will normally be specified by DW_AT_low_pc.
2982 In DWARF-3 draft 4, the base address could be overridden by
2983 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2984 compilation units with discontinuous ranges. */
2987 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2989 struct attribute
*attr
;
2992 cu
->base_address
= 0;
2994 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
2997 cu
->base_address
= DW_ADDR (attr
);
3002 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3005 cu
->base_address
= DW_ADDR (attr
);
3011 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3012 to combine the common parts.
3013 Process a compilation unit for a psymtab.
3014 BUFFER is a pointer to the beginning of the dwarf section buffer,
3015 either .debug_info or debug_types.
3016 INFO_PTR is a pointer to the start of the CU.
3017 Returns a pointer to the next CU. */
3020 process_psymtab_comp_unit (struct objfile
*objfile
,
3021 struct dwarf2_per_cu_data
*this_cu
,
3022 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3023 unsigned int buffer_size
)
3025 bfd
*abfd
= objfile
->obfd
;
3026 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3027 struct die_info
*comp_unit_die
;
3028 struct partial_symtab
*pst
;
3030 struct cleanup
*back_to_inner
;
3031 struct dwarf2_cu cu
;
3032 int has_children
, has_pc_info
;
3033 struct attribute
*attr
;
3034 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3035 struct die_reader_specs reader_specs
;
3037 init_one_comp_unit (&cu
, objfile
);
3038 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3040 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3041 buffer
, buffer_size
,
3044 /* Complete the cu_header. */
3045 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3046 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3048 cu
.list_in_scope
= &file_symbols
;
3050 /* If this compilation unit was already read in, free the
3051 cached copy in order to read it in again. This is
3052 necessary because we skipped some symbols when we first
3053 read in the compilation unit (see load_partial_dies).
3054 This problem could be avoided, but the benefit is
3056 if (this_cu
->cu
!= NULL
)
3057 free_one_cached_comp_unit (this_cu
->cu
);
3059 /* Note that this is a pointer to our stack frame, being
3060 added to a global data structure. It will be cleaned up
3061 in free_stack_comp_unit when we finish with this
3062 compilation unit. */
3064 cu
.per_cu
= this_cu
;
3066 /* Read the abbrevs for this compilation unit into a table. */
3067 dwarf2_read_abbrevs (abfd
, &cu
);
3068 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3070 /* Read the compilation unit die. */
3071 if (this_cu
->from_debug_types
)
3072 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3073 init_cu_die_reader (&reader_specs
, &cu
);
3074 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3077 if (this_cu
->from_debug_types
)
3079 /* offset,length haven't been set yet for type units. */
3080 this_cu
->offset
= cu
.header
.offset
;
3081 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3083 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3085 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3086 + cu
.header
.initial_length_size
);
3087 do_cleanups (back_to_inner
);
3091 prepare_one_comp_unit (&cu
, comp_unit_die
);
3093 /* Allocate a new partial symbol table structure. */
3094 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3095 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3096 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3097 /* TEXTLOW and TEXTHIGH are set below. */
3099 objfile
->global_psymbols
.next
,
3100 objfile
->static_psymbols
.next
);
3102 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3104 pst
->dirname
= DW_STRING (attr
);
3106 pst
->read_symtab_private
= this_cu
;
3108 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3110 /* Store the function that reads in the rest of the symbol table */
3111 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3113 this_cu
->v
.psymtab
= pst
;
3115 dwarf2_find_base_address (comp_unit_die
, &cu
);
3117 /* Possibly set the default values of LOWPC and HIGHPC from
3119 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3120 &best_highpc
, &cu
, pst
);
3121 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3122 /* Store the contiguous range if it is not empty; it can be empty for
3123 CUs with no code. */
3124 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3125 best_lowpc
+ baseaddr
,
3126 best_highpc
+ baseaddr
- 1, pst
);
3128 /* Check if comp unit has_children.
3129 If so, read the rest of the partial symbols from this comp unit.
3130 If not, there's no more debug_info for this comp unit. */
3133 struct partial_die_info
*first_die
;
3134 CORE_ADDR lowpc
, highpc
;
3136 lowpc
= ((CORE_ADDR
) -1);
3137 highpc
= ((CORE_ADDR
) 0);
3139 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3141 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3142 ! has_pc_info
, &cu
);
3144 /* If we didn't find a lowpc, set it to highpc to avoid
3145 complaints from `maint check'. */
3146 if (lowpc
== ((CORE_ADDR
) -1))
3149 /* If the compilation unit didn't have an explicit address range,
3150 then use the information extracted from its child dies. */
3154 best_highpc
= highpc
;
3157 pst
->textlow
= best_lowpc
+ baseaddr
;
3158 pst
->texthigh
= best_highpc
+ baseaddr
;
3160 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3161 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3162 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3163 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3164 sort_pst_symbols (pst
);
3166 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3167 + cu
.header
.initial_length_size
);
3169 if (this_cu
->from_debug_types
)
3171 /* It's not clear we want to do anything with stmt lists here.
3172 Waiting to see what gcc ultimately does. */
3176 /* Get the list of files included in the current compilation unit,
3177 and build a psymtab for each of them. */
3178 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3181 do_cleanups (back_to_inner
);
3186 /* Traversal function for htab_traverse_noresize.
3187 Process one .debug_types comp-unit. */
3190 process_type_comp_unit (void **slot
, void *info
)
3192 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3193 struct objfile
*objfile
= (struct objfile
*) info
;
3194 struct dwarf2_per_cu_data
*this_cu
;
3196 this_cu
= &entry
->per_cu
;
3198 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3199 process_psymtab_comp_unit (objfile
, this_cu
,
3200 dwarf2_per_objfile
->types
.buffer
,
3201 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3202 dwarf2_per_objfile
->types
.size
);
3207 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3208 Build partial symbol tables for the .debug_types comp-units. */
3211 build_type_psymtabs (struct objfile
*objfile
)
3213 if (! create_debug_types_hash_table (objfile
))
3216 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3217 process_type_comp_unit
, objfile
);
3220 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3223 psymtabs_addrmap_cleanup (void *o
)
3225 struct objfile
*objfile
= o
;
3227 objfile
->psymtabs_addrmap
= NULL
;
3230 /* Build the partial symbol table by doing a quick pass through the
3231 .debug_info and .debug_abbrev sections. */
3234 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3237 struct cleanup
*back_to
, *addrmap_cleanup
;
3238 struct obstack temp_obstack
;
3240 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3242 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3243 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3245 /* Any cached compilation units will be linked by the per-objfile
3246 read_in_chain. Make sure to free them when we're done. */
3247 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3249 build_type_psymtabs (objfile
);
3251 create_all_comp_units (objfile
);
3253 /* Create a temporary address map on a temporary obstack. We later
3254 copy this to the final obstack. */
3255 obstack_init (&temp_obstack
);
3256 make_cleanup_obstack_free (&temp_obstack
);
3257 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3258 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3260 /* Since the objects we're extracting from .debug_info vary in
3261 length, only the individual functions to extract them (like
3262 read_comp_unit_head and load_partial_die) can really know whether
3263 the buffer is large enough to hold another complete object.
3265 At the moment, they don't actually check that. If .debug_info
3266 holds just one extra byte after the last compilation unit's dies,
3267 then read_comp_unit_head will happily read off the end of the
3268 buffer. read_partial_die is similarly casual. Those functions
3271 For this loop condition, simply checking whether there's any data
3272 left at all should be sufficient. */
3274 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3275 + dwarf2_per_objfile
->info
.size
))
3277 struct dwarf2_per_cu_data
*this_cu
;
3279 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3282 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3283 dwarf2_per_objfile
->info
.buffer
,
3285 dwarf2_per_objfile
->info
.size
);
3288 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3289 &objfile
->objfile_obstack
);
3290 discard_cleanups (addrmap_cleanup
);
3292 do_cleanups (back_to
);
3295 /* Load the partial DIEs for a secondary CU into memory. */
3298 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3299 struct objfile
*objfile
)
3301 bfd
*abfd
= objfile
->obfd
;
3302 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3303 struct die_info
*comp_unit_die
;
3304 struct dwarf2_cu
*cu
;
3305 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3307 struct die_reader_specs reader_specs
;
3310 gdb_assert (! this_cu
->from_debug_types
);
3312 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3313 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3314 beg_of_comp_unit
= info_ptr
;
3316 if (this_cu
->cu
== NULL
)
3318 cu
= xmalloc (sizeof (*cu
));
3319 init_one_comp_unit (cu
, objfile
);
3323 /* If an error occurs while loading, release our storage. */
3324 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3326 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3327 dwarf2_per_objfile
->info
.buffer
,
3328 dwarf2_per_objfile
->info
.size
,
3331 /* Complete the cu_header. */
3332 cu
->header
.offset
= this_cu
->offset
;
3333 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3335 /* Link this compilation unit into the compilation unit tree. */
3337 cu
->per_cu
= this_cu
;
3339 /* Link this CU into read_in_chain. */
3340 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3341 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3346 info_ptr
+= cu
->header
.first_die_offset
;
3349 /* Read the abbrevs for this compilation unit into a table. */
3350 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3351 dwarf2_read_abbrevs (abfd
, cu
);
3352 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3354 /* Read the compilation unit die. */
3355 init_cu_die_reader (&reader_specs
, cu
);
3356 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3359 prepare_one_comp_unit (cu
, comp_unit_die
);
3361 /* Check if comp unit has_children.
3362 If so, read the rest of the partial symbols from this comp unit.
3363 If not, there's no more debug_info for this comp unit. */
3365 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3367 do_cleanups (free_abbrevs_cleanup
);
3371 /* We've successfully allocated this compilation unit. Let our
3372 caller clean it up when finished with it. */
3373 discard_cleanups (free_cu_cleanup
);
3377 /* Create a list of all compilation units in OBJFILE. We do this only
3378 if an inter-comp-unit reference is found; presumably if there is one,
3379 there will be many, and one will occur early in the .debug_info section.
3380 So there's no point in building this list incrementally. */
3383 create_all_comp_units (struct objfile
*objfile
)
3387 struct dwarf2_per_cu_data
**all_comp_units
;
3390 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3391 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3395 all_comp_units
= xmalloc (n_allocated
3396 * sizeof (struct dwarf2_per_cu_data
*));
3398 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3400 unsigned int length
, initial_length_size
;
3401 struct dwarf2_per_cu_data
*this_cu
;
3402 unsigned int offset
;
3404 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3406 /* Read just enough information to find out where the next
3407 compilation unit is. */
3408 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3409 &initial_length_size
);
3411 /* Save the compilation unit for later lookup. */
3412 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3413 sizeof (struct dwarf2_per_cu_data
));
3414 memset (this_cu
, 0, sizeof (*this_cu
));
3415 this_cu
->offset
= offset
;
3416 this_cu
->length
= length
+ initial_length_size
;
3417 this_cu
->objfile
= objfile
;
3419 if (n_comp_units
== n_allocated
)
3422 all_comp_units
= xrealloc (all_comp_units
,
3424 * sizeof (struct dwarf2_per_cu_data
*));
3426 all_comp_units
[n_comp_units
++] = this_cu
;
3428 info_ptr
= info_ptr
+ this_cu
->length
;
3431 dwarf2_per_objfile
->all_comp_units
3432 = obstack_alloc (&objfile
->objfile_obstack
,
3433 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3434 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3435 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3436 xfree (all_comp_units
);
3437 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3440 /* Process all loaded DIEs for compilation unit CU, starting at
3441 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3442 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3443 DW_AT_ranges). If NEED_PC is set, then this function will set
3444 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3445 and record the covered ranges in the addrmap. */
3448 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3449 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3451 struct partial_die_info
*pdi
;
3453 /* Now, march along the PDI's, descending into ones which have
3454 interesting children but skipping the children of the other ones,
3455 until we reach the end of the compilation unit. */
3461 fixup_partial_die (pdi
, cu
);
3463 /* Anonymous namespaces or modules have no name but have interesting
3464 children, so we need to look at them. Ditto for anonymous
3467 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3468 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3472 case DW_TAG_subprogram
:
3473 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3475 case DW_TAG_constant
:
3476 case DW_TAG_variable
:
3477 case DW_TAG_typedef
:
3478 case DW_TAG_union_type
:
3479 if (!pdi
->is_declaration
)
3481 add_partial_symbol (pdi
, cu
);
3484 case DW_TAG_class_type
:
3485 case DW_TAG_interface_type
:
3486 case DW_TAG_structure_type
:
3487 if (!pdi
->is_declaration
)
3489 add_partial_symbol (pdi
, cu
);
3492 case DW_TAG_enumeration_type
:
3493 if (!pdi
->is_declaration
)
3494 add_partial_enumeration (pdi
, cu
);
3496 case DW_TAG_base_type
:
3497 case DW_TAG_subrange_type
:
3498 /* File scope base type definitions are added to the partial
3500 add_partial_symbol (pdi
, cu
);
3502 case DW_TAG_namespace
:
3503 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3506 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3513 /* If the die has a sibling, skip to the sibling. */
3515 pdi
= pdi
->die_sibling
;
3519 /* Functions used to compute the fully scoped name of a partial DIE.
3521 Normally, this is simple. For C++, the parent DIE's fully scoped
3522 name is concatenated with "::" and the partial DIE's name. For
3523 Java, the same thing occurs except that "." is used instead of "::".
3524 Enumerators are an exception; they use the scope of their parent
3525 enumeration type, i.e. the name of the enumeration type is not
3526 prepended to the enumerator.
3528 There are two complexities. One is DW_AT_specification; in this
3529 case "parent" means the parent of the target of the specification,
3530 instead of the direct parent of the DIE. The other is compilers
3531 which do not emit DW_TAG_namespace; in this case we try to guess
3532 the fully qualified name of structure types from their members'
3533 linkage names. This must be done using the DIE's children rather
3534 than the children of any DW_AT_specification target. We only need
3535 to do this for structures at the top level, i.e. if the target of
3536 any DW_AT_specification (if any; otherwise the DIE itself) does not
3539 /* Compute the scope prefix associated with PDI's parent, in
3540 compilation unit CU. The result will be allocated on CU's
3541 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3542 field. NULL is returned if no prefix is necessary. */
3544 partial_die_parent_scope (struct partial_die_info
*pdi
,
3545 struct dwarf2_cu
*cu
)
3547 char *grandparent_scope
;
3548 struct partial_die_info
*parent
, *real_pdi
;
3550 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3551 then this means the parent of the specification DIE. */
3554 while (real_pdi
->has_specification
)
3555 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3557 parent
= real_pdi
->die_parent
;
3561 if (parent
->scope_set
)
3562 return parent
->scope
;
3564 fixup_partial_die (parent
, cu
);
3566 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3568 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3569 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3570 Work around this problem here. */
3571 if (cu
->language
== language_cplus
3572 && parent
->tag
== DW_TAG_namespace
3573 && strcmp (parent
->name
, "::") == 0
3574 && grandparent_scope
== NULL
)
3576 parent
->scope
= NULL
;
3577 parent
->scope_set
= 1;
3581 if (parent
->tag
== DW_TAG_namespace
3582 || parent
->tag
== DW_TAG_module
3583 || parent
->tag
== DW_TAG_structure_type
3584 || parent
->tag
== DW_TAG_class_type
3585 || parent
->tag
== DW_TAG_interface_type
3586 || parent
->tag
== DW_TAG_union_type
3587 || parent
->tag
== DW_TAG_enumeration_type
)
3589 if (grandparent_scope
== NULL
)
3590 parent
->scope
= parent
->name
;
3592 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3593 parent
->name
, 0, cu
);
3595 else if (parent
->tag
== DW_TAG_enumerator
)
3596 /* Enumerators should not get the name of the enumeration as a prefix. */
3597 parent
->scope
= grandparent_scope
;
3600 /* FIXME drow/2004-04-01: What should we be doing with
3601 function-local names? For partial symbols, we should probably be
3603 complaint (&symfile_complaints
,
3604 _("unhandled containing DIE tag %d for DIE at %d"),
3605 parent
->tag
, pdi
->offset
);
3606 parent
->scope
= grandparent_scope
;
3609 parent
->scope_set
= 1;
3610 return parent
->scope
;
3613 /* Return the fully scoped name associated with PDI, from compilation unit
3614 CU. The result will be allocated with malloc. */
3616 partial_die_full_name (struct partial_die_info
*pdi
,
3617 struct dwarf2_cu
*cu
)
3621 /* If this is a template instantiation, we can not work out the
3622 template arguments from partial DIEs. So, unfortunately, we have
3623 to go through the full DIEs. At least any work we do building
3624 types here will be reused if full symbols are loaded later. */
3625 if (pdi
->has_template_arguments
)
3627 fixup_partial_die (pdi
, cu
);
3629 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3631 struct die_info
*die
;
3632 struct attribute attr
;
3633 struct dwarf2_cu
*ref_cu
= cu
;
3636 attr
.form
= DW_FORM_ref_addr
;
3637 attr
.u
.addr
= pdi
->offset
;
3638 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3640 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3644 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3645 if (parent_scope
== NULL
)
3648 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3652 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3654 struct objfile
*objfile
= cu
->objfile
;
3656 char *actual_name
= NULL
;
3657 const struct partial_symbol
*psym
= NULL
;
3659 int built_actual_name
= 0;
3661 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3663 actual_name
= partial_die_full_name (pdi
, cu
);
3665 built_actual_name
= 1;
3667 if (actual_name
== NULL
)
3668 actual_name
= pdi
->name
;
3672 case DW_TAG_subprogram
:
3673 if (pdi
->is_external
|| cu
->language
== language_ada
)
3675 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3676 of the global scope. But in Ada, we want to be able to access
3677 nested procedures globally. So all Ada subprograms are stored
3678 in the global scope. */
3679 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3680 mst_text, objfile); */
3681 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3683 VAR_DOMAIN
, LOC_BLOCK
,
3684 &objfile
->global_psymbols
,
3685 0, pdi
->lowpc
+ baseaddr
,
3686 cu
->language
, objfile
);
3690 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3691 mst_file_text, objfile); */
3692 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3694 VAR_DOMAIN
, LOC_BLOCK
,
3695 &objfile
->static_psymbols
,
3696 0, pdi
->lowpc
+ baseaddr
,
3697 cu
->language
, objfile
);
3700 case DW_TAG_constant
:
3702 struct psymbol_allocation_list
*list
;
3704 if (pdi
->is_external
)
3705 list
= &objfile
->global_psymbols
;
3707 list
= &objfile
->static_psymbols
;
3708 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3709 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3710 list
, 0, 0, cu
->language
, objfile
);
3714 case DW_TAG_variable
:
3716 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3720 && !dwarf2_per_objfile
->has_section_at_zero
)
3722 /* A global or static variable may also have been stripped
3723 out by the linker if unused, in which case its address
3724 will be nullified; do not add such variables into partial
3725 symbol table then. */
3727 else if (pdi
->is_external
)
3730 Don't enter into the minimal symbol tables as there is
3731 a minimal symbol table entry from the ELF symbols already.
3732 Enter into partial symbol table if it has a location
3733 descriptor or a type.
3734 If the location descriptor is missing, new_symbol will create
3735 a LOC_UNRESOLVED symbol, the address of the variable will then
3736 be determined from the minimal symbol table whenever the variable
3738 The address for the partial symbol table entry is not
3739 used by GDB, but it comes in handy for debugging partial symbol
3742 if (pdi
->locdesc
|| pdi
->has_type
)
3743 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3745 VAR_DOMAIN
, LOC_STATIC
,
3746 &objfile
->global_psymbols
,
3748 cu
->language
, objfile
);
3752 /* Static Variable. Skip symbols without location descriptors. */
3753 if (pdi
->locdesc
== NULL
)
3755 if (built_actual_name
)
3756 xfree (actual_name
);
3759 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3760 mst_file_data, objfile); */
3761 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3763 VAR_DOMAIN
, LOC_STATIC
,
3764 &objfile
->static_psymbols
,
3766 cu
->language
, objfile
);
3769 case DW_TAG_typedef
:
3770 case DW_TAG_base_type
:
3771 case DW_TAG_subrange_type
:
3772 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3774 VAR_DOMAIN
, LOC_TYPEDEF
,
3775 &objfile
->static_psymbols
,
3776 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3778 case DW_TAG_namespace
:
3779 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3781 VAR_DOMAIN
, LOC_TYPEDEF
,
3782 &objfile
->global_psymbols
,
3783 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3785 case DW_TAG_class_type
:
3786 case DW_TAG_interface_type
:
3787 case DW_TAG_structure_type
:
3788 case DW_TAG_union_type
:
3789 case DW_TAG_enumeration_type
:
3790 /* Skip external references. The DWARF standard says in the section
3791 about "Structure, Union, and Class Type Entries": "An incomplete
3792 structure, union or class type is represented by a structure,
3793 union or class entry that does not have a byte size attribute
3794 and that has a DW_AT_declaration attribute." */
3795 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3797 if (built_actual_name
)
3798 xfree (actual_name
);
3802 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3803 static vs. global. */
3804 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3806 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3807 (cu
->language
== language_cplus
3808 || cu
->language
== language_java
)
3809 ? &objfile
->global_psymbols
3810 : &objfile
->static_psymbols
,
3811 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3814 case DW_TAG_enumerator
:
3815 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3817 VAR_DOMAIN
, LOC_CONST
,
3818 (cu
->language
== language_cplus
3819 || cu
->language
== language_java
)
3820 ? &objfile
->global_psymbols
3821 : &objfile
->static_psymbols
,
3822 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3828 if (built_actual_name
)
3829 xfree (actual_name
);
3832 /* Read a partial die corresponding to a namespace; also, add a symbol
3833 corresponding to that namespace to the symbol table. NAMESPACE is
3834 the name of the enclosing namespace. */
3837 add_partial_namespace (struct partial_die_info
*pdi
,
3838 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3839 int need_pc
, struct dwarf2_cu
*cu
)
3841 /* Add a symbol for the namespace. */
3843 add_partial_symbol (pdi
, cu
);
3845 /* Now scan partial symbols in that namespace. */
3847 if (pdi
->has_children
)
3848 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3851 /* Read a partial die corresponding to a Fortran module. */
3854 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3855 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3857 /* Now scan partial symbols in that module. */
3859 if (pdi
->has_children
)
3860 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3863 /* Read a partial die corresponding to a subprogram and create a partial
3864 symbol for that subprogram. When the CU language allows it, this
3865 routine also defines a partial symbol for each nested subprogram
3866 that this subprogram contains.
3868 DIE my also be a lexical block, in which case we simply search
3869 recursively for suprograms defined inside that lexical block.
3870 Again, this is only performed when the CU language allows this
3871 type of definitions. */
3874 add_partial_subprogram (struct partial_die_info
*pdi
,
3875 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3876 int need_pc
, struct dwarf2_cu
*cu
)
3878 if (pdi
->tag
== DW_TAG_subprogram
)
3880 if (pdi
->has_pc_info
)
3882 if (pdi
->lowpc
< *lowpc
)
3883 *lowpc
= pdi
->lowpc
;
3884 if (pdi
->highpc
> *highpc
)
3885 *highpc
= pdi
->highpc
;
3889 struct objfile
*objfile
= cu
->objfile
;
3891 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3892 SECT_OFF_TEXT (objfile
));
3893 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3894 pdi
->lowpc
+ baseaddr
,
3895 pdi
->highpc
- 1 + baseaddr
,
3896 cu
->per_cu
->v
.psymtab
);
3898 if (!pdi
->is_declaration
)
3899 /* Ignore subprogram DIEs that do not have a name, they are
3900 illegal. Do not emit a complaint at this point, we will
3901 do so when we convert this psymtab into a symtab. */
3903 add_partial_symbol (pdi
, cu
);
3907 if (! pdi
->has_children
)
3910 if (cu
->language
== language_ada
)
3912 pdi
= pdi
->die_child
;
3915 fixup_partial_die (pdi
, cu
);
3916 if (pdi
->tag
== DW_TAG_subprogram
3917 || pdi
->tag
== DW_TAG_lexical_block
)
3918 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3919 pdi
= pdi
->die_sibling
;
3924 /* Read a partial die corresponding to an enumeration type. */
3927 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3928 struct dwarf2_cu
*cu
)
3930 struct partial_die_info
*pdi
;
3932 if (enum_pdi
->name
!= NULL
)
3933 add_partial_symbol (enum_pdi
, cu
);
3935 pdi
= enum_pdi
->die_child
;
3938 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3939 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3941 add_partial_symbol (pdi
, cu
);
3942 pdi
= pdi
->die_sibling
;
3946 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3947 Return the corresponding abbrev, or NULL if the number is zero (indicating
3948 an empty DIE). In either case *BYTES_READ will be set to the length of
3949 the initial number. */
3951 static struct abbrev_info
*
3952 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3953 struct dwarf2_cu
*cu
)
3955 bfd
*abfd
= cu
->objfile
->obfd
;
3956 unsigned int abbrev_number
;
3957 struct abbrev_info
*abbrev
;
3959 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
3961 if (abbrev_number
== 0)
3964 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
3967 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
3968 bfd_get_filename (abfd
));
3974 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3975 Returns a pointer to the end of a series of DIEs, terminated by an empty
3976 DIE. Any children of the skipped DIEs will also be skipped. */
3979 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
3981 struct abbrev_info
*abbrev
;
3982 unsigned int bytes_read
;
3986 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
3988 return info_ptr
+ bytes_read
;
3990 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
3994 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3995 INFO_PTR should point just after the initial uleb128 of a DIE, and the
3996 abbrev corresponding to that skipped uleb128 should be passed in
3997 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4001 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4002 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4004 unsigned int bytes_read
;
4005 struct attribute attr
;
4006 bfd
*abfd
= cu
->objfile
->obfd
;
4007 unsigned int form
, i
;
4009 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4011 /* The only abbrev we care about is DW_AT_sibling. */
4012 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4014 read_attribute (&attr
, &abbrev
->attrs
[i
],
4015 abfd
, info_ptr
, cu
);
4016 if (attr
.form
== DW_FORM_ref_addr
)
4017 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4019 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4022 /* If it isn't DW_AT_sibling, skip this attribute. */
4023 form
= abbrev
->attrs
[i
].form
;
4027 case DW_FORM_ref_addr
:
4028 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4029 and later it is offset sized. */
4030 if (cu
->header
.version
== 2)
4031 info_ptr
+= cu
->header
.addr_size
;
4033 info_ptr
+= cu
->header
.offset_size
;
4036 info_ptr
+= cu
->header
.addr_size
;
4043 case DW_FORM_flag_present
:
4058 case DW_FORM_string
:
4059 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4060 info_ptr
+= bytes_read
;
4062 case DW_FORM_sec_offset
:
4064 info_ptr
+= cu
->header
.offset_size
;
4066 case DW_FORM_exprloc
:
4068 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4069 info_ptr
+= bytes_read
;
4071 case DW_FORM_block1
:
4072 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4074 case DW_FORM_block2
:
4075 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4077 case DW_FORM_block4
:
4078 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4082 case DW_FORM_ref_udata
:
4083 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4085 case DW_FORM_indirect
:
4086 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4087 info_ptr
+= bytes_read
;
4088 /* We need to continue parsing from here, so just go back to
4090 goto skip_attribute
;
4093 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4094 dwarf_form_name (form
),
4095 bfd_get_filename (abfd
));
4099 if (abbrev
->has_children
)
4100 return skip_children (buffer
, info_ptr
, cu
);
4105 /* Locate ORIG_PDI's sibling.
4106 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4110 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4111 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4112 bfd
*abfd
, struct dwarf2_cu
*cu
)
4114 /* Do we know the sibling already? */
4116 if (orig_pdi
->sibling
)
4117 return orig_pdi
->sibling
;
4119 /* Are there any children to deal with? */
4121 if (!orig_pdi
->has_children
)
4124 /* Skip the children the long way. */
4126 return skip_children (buffer
, info_ptr
, cu
);
4129 /* Expand this partial symbol table into a full symbol table. */
4132 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4138 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4144 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4145 gdb_flush (gdb_stdout
);
4148 /* Restore our global data. */
4149 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4150 dwarf2_objfile_data_key
);
4152 /* If this psymtab is constructed from a debug-only objfile, the
4153 has_section_at_zero flag will not necessarily be correct. We
4154 can get the correct value for this flag by looking at the data
4155 associated with the (presumably stripped) associated objfile. */
4156 if (pst
->objfile
->separate_debug_objfile_backlink
)
4158 struct dwarf2_per_objfile
*dpo_backlink
4159 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4160 dwarf2_objfile_data_key
);
4162 dwarf2_per_objfile
->has_section_at_zero
4163 = dpo_backlink
->has_section_at_zero
;
4166 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4168 psymtab_to_symtab_1 (pst
);
4170 /* Finish up the debug error message. */
4172 printf_filtered (_("done.\n"));
4177 /* Add PER_CU to the queue. */
4180 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4182 struct dwarf2_queue_item
*item
;
4185 item
= xmalloc (sizeof (*item
));
4186 item
->per_cu
= per_cu
;
4189 if (dwarf2_queue
== NULL
)
4190 dwarf2_queue
= item
;
4192 dwarf2_queue_tail
->next
= item
;
4194 dwarf2_queue_tail
= item
;
4197 /* Process the queue. */
4200 process_queue (struct objfile
*objfile
)
4202 struct dwarf2_queue_item
*item
, *next_item
;
4204 /* The queue starts out with one item, but following a DIE reference
4205 may load a new CU, adding it to the end of the queue. */
4206 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4208 if (dwarf2_per_objfile
->using_index
4209 ? !item
->per_cu
->v
.quick
->symtab
4210 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4211 process_full_comp_unit (item
->per_cu
);
4213 item
->per_cu
->queued
= 0;
4214 next_item
= item
->next
;
4218 dwarf2_queue_tail
= NULL
;
4221 /* Free all allocated queue entries. This function only releases anything if
4222 an error was thrown; if the queue was processed then it would have been
4223 freed as we went along. */
4226 dwarf2_release_queue (void *dummy
)
4228 struct dwarf2_queue_item
*item
, *last
;
4230 item
= dwarf2_queue
;
4233 /* Anything still marked queued is likely to be in an
4234 inconsistent state, so discard it. */
4235 if (item
->per_cu
->queued
)
4237 if (item
->per_cu
->cu
!= NULL
)
4238 free_one_cached_comp_unit (item
->per_cu
->cu
);
4239 item
->per_cu
->queued
= 0;
4247 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4250 /* Read in full symbols for PST, and anything it depends on. */
4253 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4255 struct dwarf2_per_cu_data
*per_cu
;
4256 struct cleanup
*back_to
;
4259 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4260 if (!pst
->dependencies
[i
]->readin
)
4262 /* Inform about additional files that need to be read in. */
4265 /* FIXME: i18n: Need to make this a single string. */
4266 fputs_filtered (" ", gdb_stdout
);
4268 fputs_filtered ("and ", gdb_stdout
);
4270 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4271 wrap_here (""); /* Flush output */
4272 gdb_flush (gdb_stdout
);
4274 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4277 per_cu
= pst
->read_symtab_private
;
4281 /* It's an include file, no symbols to read for it.
4282 Everything is in the parent symtab. */
4287 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4290 /* Load the DIEs associated with PER_CU into memory. */
4293 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4295 bfd
*abfd
= objfile
->obfd
;
4296 struct dwarf2_cu
*cu
;
4297 unsigned int offset
;
4298 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4299 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4300 struct attribute
*attr
;
4303 gdb_assert (! per_cu
->from_debug_types
);
4305 /* Set local variables from the partial symbol table info. */
4306 offset
= per_cu
->offset
;
4308 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4309 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4310 beg_of_comp_unit
= info_ptr
;
4312 if (per_cu
->cu
== NULL
)
4314 cu
= xmalloc (sizeof (*cu
));
4315 init_one_comp_unit (cu
, objfile
);
4319 /* If an error occurs while loading, release our storage. */
4320 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4322 /* Read in the comp_unit header. */
4323 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4325 /* Complete the cu_header. */
4326 cu
->header
.offset
= offset
;
4327 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4329 /* Read the abbrevs for this compilation unit. */
4330 dwarf2_read_abbrevs (abfd
, cu
);
4331 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4333 /* Link this compilation unit into the compilation unit tree. */
4335 cu
->per_cu
= per_cu
;
4337 /* Link this CU into read_in_chain. */
4338 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4339 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4344 info_ptr
+= cu
->header
.first_die_offset
;
4347 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4349 /* We try not to read any attributes in this function, because not
4350 all objfiles needed for references have been loaded yet, and symbol
4351 table processing isn't initialized. But we have to set the CU language,
4352 or we won't be able to build types correctly. */
4353 prepare_one_comp_unit (cu
, cu
->dies
);
4355 /* Similarly, if we do not read the producer, we can not apply
4356 producer-specific interpretation. */
4357 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4359 cu
->producer
= DW_STRING (attr
);
4363 do_cleanups (free_abbrevs_cleanup
);
4365 /* We've successfully allocated this compilation unit. Let our
4366 caller clean it up when finished with it. */
4367 discard_cleanups (free_cu_cleanup
);
4371 /* Add a DIE to the delayed physname list. */
4374 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4375 const char *name
, struct die_info
*die
,
4376 struct dwarf2_cu
*cu
)
4378 struct delayed_method_info mi
;
4380 mi
.fnfield_index
= fnfield_index
;
4384 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4387 /* A cleanup for freeing the delayed method list. */
4390 free_delayed_list (void *ptr
)
4392 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4393 if (cu
->method_list
!= NULL
)
4395 VEC_free (delayed_method_info
, cu
->method_list
);
4396 cu
->method_list
= NULL
;
4400 /* Compute the physnames of any methods on the CU's method list.
4402 The computation of method physnames is delayed in order to avoid the
4403 (bad) condition that one of the method's formal parameters is of an as yet
4407 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4410 struct delayed_method_info
*mi
;
4411 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4414 struct fn_fieldlist
*fn_flp
4415 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4416 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4417 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4421 /* Generate full symbol information for PST and CU, whose DIEs have
4422 already been loaded into memory. */
4425 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4427 struct dwarf2_cu
*cu
= per_cu
->cu
;
4428 struct objfile
*objfile
= per_cu
->objfile
;
4429 CORE_ADDR lowpc
, highpc
;
4430 struct symtab
*symtab
;
4431 struct cleanup
*back_to
, *delayed_list_cleanup
;
4434 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4437 back_to
= make_cleanup (really_free_pendings
, NULL
);
4438 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4440 cu
->list_in_scope
= &file_symbols
;
4442 dwarf2_find_base_address (cu
->dies
, cu
);
4444 /* Do line number decoding in read_file_scope () */
4445 process_die (cu
->dies
, cu
);
4447 /* Now that we have processed all the DIEs in the CU, all the types
4448 should be complete, and it should now be safe to compute all of the
4450 compute_delayed_physnames (cu
);
4451 do_cleanups (delayed_list_cleanup
);
4453 /* Some compilers don't define a DW_AT_high_pc attribute for the
4454 compilation unit. If the DW_AT_high_pc is missing, synthesize
4455 it, by scanning the DIE's below the compilation unit. */
4456 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4458 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4460 /* Set symtab language to language from DW_AT_language.
4461 If the compilation is from a C file generated by language preprocessors,
4462 do not set the language if it was already deduced by start_subfile. */
4464 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4466 symtab
->language
= cu
->language
;
4469 if (dwarf2_per_objfile
->using_index
)
4470 per_cu
->v
.quick
->symtab
= symtab
;
4473 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4474 pst
->symtab
= symtab
;
4478 do_cleanups (back_to
);
4481 /* Process a die and its children. */
4484 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4488 case DW_TAG_padding
:
4490 case DW_TAG_compile_unit
:
4491 read_file_scope (die
, cu
);
4493 case DW_TAG_type_unit
:
4494 read_type_unit_scope (die
, cu
);
4496 case DW_TAG_subprogram
:
4497 case DW_TAG_inlined_subroutine
:
4498 read_func_scope (die
, cu
);
4500 case DW_TAG_lexical_block
:
4501 case DW_TAG_try_block
:
4502 case DW_TAG_catch_block
:
4503 read_lexical_block_scope (die
, cu
);
4505 case DW_TAG_class_type
:
4506 case DW_TAG_interface_type
:
4507 case DW_TAG_structure_type
:
4508 case DW_TAG_union_type
:
4509 process_structure_scope (die
, cu
);
4511 case DW_TAG_enumeration_type
:
4512 process_enumeration_scope (die
, cu
);
4515 /* These dies have a type, but processing them does not create
4516 a symbol or recurse to process the children. Therefore we can
4517 read them on-demand through read_type_die. */
4518 case DW_TAG_subroutine_type
:
4519 case DW_TAG_set_type
:
4520 case DW_TAG_array_type
:
4521 case DW_TAG_pointer_type
:
4522 case DW_TAG_ptr_to_member_type
:
4523 case DW_TAG_reference_type
:
4524 case DW_TAG_string_type
:
4527 case DW_TAG_base_type
:
4528 case DW_TAG_subrange_type
:
4529 case DW_TAG_typedef
:
4530 /* Add a typedef symbol for the type definition, if it has a
4532 new_symbol (die
, read_type_die (die
, cu
), cu
);
4534 case DW_TAG_common_block
:
4535 read_common_block (die
, cu
);
4537 case DW_TAG_common_inclusion
:
4539 case DW_TAG_namespace
:
4540 processing_has_namespace_info
= 1;
4541 read_namespace (die
, cu
);
4544 processing_has_namespace_info
= 1;
4545 read_module (die
, cu
);
4547 case DW_TAG_imported_declaration
:
4548 case DW_TAG_imported_module
:
4549 processing_has_namespace_info
= 1;
4550 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4551 || cu
->language
!= language_fortran
))
4552 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4553 dwarf_tag_name (die
->tag
));
4554 read_import_statement (die
, cu
);
4557 new_symbol (die
, NULL
, cu
);
4562 /* A helper function for dwarf2_compute_name which determines whether DIE
4563 needs to have the name of the scope prepended to the name listed in the
4567 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4569 struct attribute
*attr
;
4573 case DW_TAG_namespace
:
4574 case DW_TAG_typedef
:
4575 case DW_TAG_class_type
:
4576 case DW_TAG_interface_type
:
4577 case DW_TAG_structure_type
:
4578 case DW_TAG_union_type
:
4579 case DW_TAG_enumeration_type
:
4580 case DW_TAG_enumerator
:
4581 case DW_TAG_subprogram
:
4585 case DW_TAG_variable
:
4586 case DW_TAG_constant
:
4587 /* We only need to prefix "globally" visible variables. These include
4588 any variable marked with DW_AT_external or any variable that
4589 lives in a namespace. [Variables in anonymous namespaces
4590 require prefixing, but they are not DW_AT_external.] */
4592 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4594 struct dwarf2_cu
*spec_cu
= cu
;
4596 return die_needs_namespace (die_specification (die
, &spec_cu
),
4600 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4601 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4602 && die
->parent
->tag
!= DW_TAG_module
)
4604 /* A variable in a lexical block of some kind does not need a
4605 namespace, even though in C++ such variables may be external
4606 and have a mangled name. */
4607 if (die
->parent
->tag
== DW_TAG_lexical_block
4608 || die
->parent
->tag
== DW_TAG_try_block
4609 || die
->parent
->tag
== DW_TAG_catch_block
4610 || die
->parent
->tag
== DW_TAG_subprogram
)
4619 /* Retrieve the last character from a mem_file. */
4622 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4624 char *last_char_p
= (char *) object
;
4627 *last_char_p
= buffer
[length
- 1];
4630 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4631 compute the physname for the object, which include a method's
4632 formal parameters (C++/Java) and return type (Java).
4634 For Ada, return the DIE's linkage name rather than the fully qualified
4635 name. PHYSNAME is ignored..
4637 The result is allocated on the objfile_obstack and canonicalized. */
4640 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4644 name
= dwarf2_name (die
, cu
);
4646 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4647 compute it by typename_concat inside GDB. */
4648 if (cu
->language
== language_ada
4649 || (cu
->language
== language_fortran
&& physname
))
4651 /* For Ada unit, we prefer the linkage name over the name, as
4652 the former contains the exported name, which the user expects
4653 to be able to reference. Ideally, we want the user to be able
4654 to reference this entity using either natural or linkage name,
4655 but we haven't started looking at this enhancement yet. */
4656 struct attribute
*attr
;
4658 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4660 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4661 if (attr
&& DW_STRING (attr
))
4662 return DW_STRING (attr
);
4665 /* These are the only languages we know how to qualify names in. */
4667 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4668 || cu
->language
== language_fortran
))
4670 if (die_needs_namespace (die
, cu
))
4674 struct ui_file
*buf
;
4676 prefix
= determine_prefix (die
, cu
);
4677 buf
= mem_fileopen ();
4678 if (*prefix
!= '\0')
4680 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4683 fputs_unfiltered (prefixed_name
, buf
);
4684 xfree (prefixed_name
);
4687 fputs_unfiltered (name
? name
: "", buf
);
4689 /* Template parameters may be specified in the DIE's DW_AT_name, or
4690 as children with DW_TAG_template_type_param or
4691 DW_TAG_value_type_param. If the latter, add them to the name
4692 here. If the name already has template parameters, then
4693 skip this step; some versions of GCC emit both, and
4694 it is more efficient to use the pre-computed name.
4696 Something to keep in mind about this process: it is very
4697 unlikely, or in some cases downright impossible, to produce
4698 something that will match the mangled name of a function.
4699 If the definition of the function has the same debug info,
4700 we should be able to match up with it anyway. But fallbacks
4701 using the minimal symbol, for instance to find a method
4702 implemented in a stripped copy of libstdc++, will not work.
4703 If we do not have debug info for the definition, we will have to
4704 match them up some other way.
4706 When we do name matching there is a related problem with function
4707 templates; two instantiated function templates are allowed to
4708 differ only by their return types, which we do not add here. */
4710 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4712 struct attribute
*attr
;
4713 struct die_info
*child
;
4716 die
->building_fullname
= 1;
4718 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4723 struct dwarf2_locexpr_baton
*baton
;
4726 if (child
->tag
!= DW_TAG_template_type_param
4727 && child
->tag
!= DW_TAG_template_value_param
)
4732 fputs_unfiltered ("<", buf
);
4736 fputs_unfiltered (", ", buf
);
4738 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4741 complaint (&symfile_complaints
,
4742 _("template parameter missing DW_AT_type"));
4743 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4746 type
= die_type (child
, cu
);
4748 if (child
->tag
== DW_TAG_template_type_param
)
4750 c_print_type (type
, "", buf
, -1, 0);
4754 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4757 complaint (&symfile_complaints
,
4758 _("template parameter missing DW_AT_const_value"));
4759 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4763 dwarf2_const_value_attr (attr
, type
, name
,
4764 &cu
->comp_unit_obstack
, cu
,
4765 &value
, &bytes
, &baton
);
4767 if (TYPE_NOSIGN (type
))
4768 /* GDB prints characters as NUMBER 'CHAR'. If that's
4769 changed, this can use value_print instead. */
4770 c_printchar (value
, type
, buf
);
4773 struct value_print_options opts
;
4776 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4780 else if (bytes
!= NULL
)
4782 v
= allocate_value (type
);
4783 memcpy (value_contents_writeable (v
), bytes
,
4784 TYPE_LENGTH (type
));
4787 v
= value_from_longest (type
, value
);
4789 /* Specify decimal so that we do not depend on the radix. */
4790 get_formatted_print_options (&opts
, 'd');
4792 value_print (v
, buf
, &opts
);
4798 die
->building_fullname
= 0;
4802 /* Close the argument list, with a space if necessary
4803 (nested templates). */
4804 char last_char
= '\0';
4805 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4806 if (last_char
== '>')
4807 fputs_unfiltered (" >", buf
);
4809 fputs_unfiltered (">", buf
);
4813 /* For Java and C++ methods, append formal parameter type
4814 information, if PHYSNAME. */
4816 if (physname
&& die
->tag
== DW_TAG_subprogram
4817 && (cu
->language
== language_cplus
4818 || cu
->language
== language_java
))
4820 struct type
*type
= read_type_die (die
, cu
);
4822 c_type_print_args (type
, buf
, 0, cu
->language
);
4824 if (cu
->language
== language_java
)
4826 /* For java, we must append the return type to method
4828 if (die
->tag
== DW_TAG_subprogram
)
4829 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4832 else if (cu
->language
== language_cplus
)
4834 /* Assume that an artificial first parameter is
4835 "this", but do not crash if it is not. RealView
4836 marks unnamed (and thus unused) parameters as
4837 artificial; there is no way to differentiate
4839 if (TYPE_NFIELDS (type
) > 0
4840 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4841 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4842 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4843 fputs_unfiltered (" const", buf
);
4847 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4849 ui_file_delete (buf
);
4851 if (cu
->language
== language_cplus
)
4854 = dwarf2_canonicalize_name (name
, cu
,
4855 &cu
->objfile
->objfile_obstack
);
4866 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4867 If scope qualifiers are appropriate they will be added. The result
4868 will be allocated on the objfile_obstack, or NULL if the DIE does
4869 not have a name. NAME may either be from a previous call to
4870 dwarf2_name or NULL.
4872 The output string will be canonicalized (if C++/Java). */
4875 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4877 return dwarf2_compute_name (name
, die
, cu
, 0);
4880 /* Construct a physname for the given DIE in CU. NAME may either be
4881 from a previous call to dwarf2_name or NULL. The result will be
4882 allocated on the objfile_objstack or NULL if the DIE does not have a
4885 The output string will be canonicalized (if C++/Java). */
4888 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4890 return dwarf2_compute_name (name
, die
, cu
, 1);
4893 /* Read the import statement specified by the given die and record it. */
4896 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4898 struct attribute
*import_attr
;
4899 struct die_info
*imported_die
;
4900 struct dwarf2_cu
*imported_cu
;
4901 const char *imported_name
;
4902 const char *imported_name_prefix
;
4903 const char *canonical_name
;
4904 const char *import_alias
;
4905 const char *imported_declaration
= NULL
;
4906 const char *import_prefix
;
4910 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4911 if (import_attr
== NULL
)
4913 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4914 dwarf_tag_name (die
->tag
));
4919 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4920 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4921 if (imported_name
== NULL
)
4923 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4925 The import in the following code:
4939 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4940 <52> DW_AT_decl_file : 1
4941 <53> DW_AT_decl_line : 6
4942 <54> DW_AT_import : <0x75>
4943 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4945 <5b> DW_AT_decl_file : 1
4946 <5c> DW_AT_decl_line : 2
4947 <5d> DW_AT_type : <0x6e>
4949 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4950 <76> DW_AT_byte_size : 4
4951 <77> DW_AT_encoding : 5 (signed)
4953 imports the wrong die ( 0x75 instead of 0x58 ).
4954 This case will be ignored until the gcc bug is fixed. */
4958 /* Figure out the local name after import. */
4959 import_alias
= dwarf2_name (die
, cu
);
4961 /* Figure out where the statement is being imported to. */
4962 import_prefix
= determine_prefix (die
, cu
);
4964 /* Figure out what the scope of the imported die is and prepend it
4965 to the name of the imported die. */
4966 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
4968 if (imported_die
->tag
!= DW_TAG_namespace
4969 && imported_die
->tag
!= DW_TAG_module
)
4971 imported_declaration
= imported_name
;
4972 canonical_name
= imported_name_prefix
;
4974 else if (strlen (imported_name_prefix
) > 0)
4976 temp
= alloca (strlen (imported_name_prefix
)
4977 + 2 + strlen (imported_name
) + 1);
4978 strcpy (temp
, imported_name_prefix
);
4979 strcat (temp
, "::");
4980 strcat (temp
, imported_name
);
4981 canonical_name
= temp
;
4984 canonical_name
= imported_name
;
4986 cp_add_using_directive (import_prefix
,
4989 imported_declaration
,
4990 &cu
->objfile
->objfile_obstack
);
4994 initialize_cu_func_list (struct dwarf2_cu
*cu
)
4996 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5000 free_cu_line_header (void *arg
)
5002 struct dwarf2_cu
*cu
= arg
;
5004 free_line_header (cu
->line_header
);
5005 cu
->line_header
= NULL
;
5009 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5010 char **name
, char **comp_dir
)
5012 struct attribute
*attr
;
5017 /* Find the filename. Do not use dwarf2_name here, since the filename
5018 is not a source language identifier. */
5019 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5022 *name
= DW_STRING (attr
);
5025 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5027 *comp_dir
= DW_STRING (attr
);
5028 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5030 *comp_dir
= ldirname (*name
);
5031 if (*comp_dir
!= NULL
)
5032 make_cleanup (xfree
, *comp_dir
);
5034 if (*comp_dir
!= NULL
)
5036 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5037 directory, get rid of it. */
5038 char *cp
= strchr (*comp_dir
, ':');
5040 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5045 *name
= "<unknown>";
5049 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5051 struct objfile
*objfile
= cu
->objfile
;
5052 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5053 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5054 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5055 struct attribute
*attr
;
5057 char *comp_dir
= NULL
;
5058 struct die_info
*child_die
;
5059 bfd
*abfd
= objfile
->obfd
;
5060 struct line_header
*line_header
= 0;
5063 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5065 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5067 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5068 from finish_block. */
5069 if (lowpc
== ((CORE_ADDR
) -1))
5074 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5076 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5079 set_cu_language (DW_UNSND (attr
), cu
);
5082 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5084 cu
->producer
= DW_STRING (attr
);
5086 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5087 standardised yet. As a workaround for the language detection we fall
5088 back to the DW_AT_producer string. */
5089 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5090 cu
->language
= language_opencl
;
5092 /* We assume that we're processing GCC output. */
5093 processing_gcc_compilation
= 2;
5095 processing_has_namespace_info
= 0;
5097 start_symtab (name
, comp_dir
, lowpc
);
5098 record_debugformat ("DWARF 2");
5099 record_producer (cu
->producer
);
5101 initialize_cu_func_list (cu
);
5103 /* Decode line number information if present. We do this before
5104 processing child DIEs, so that the line header table is available
5105 for DW_AT_decl_file. */
5106 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5109 unsigned int line_offset
= DW_UNSND (attr
);
5110 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5113 cu
->line_header
= line_header
;
5114 make_cleanup (free_cu_line_header
, cu
);
5115 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5119 /* Process all dies in compilation unit. */
5120 if (die
->child
!= NULL
)
5122 child_die
= die
->child
;
5123 while (child_die
&& child_die
->tag
)
5125 process_die (child_die
, cu
);
5126 child_die
= sibling_die (child_die
);
5130 /* Decode macro information, if present. Dwarf 2 macro information
5131 refers to information in the line number info statement program
5132 header, so we can only read it if we've read the header
5134 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5135 if (attr
&& line_header
)
5137 unsigned int macro_offset
= DW_UNSND (attr
);
5139 dwarf_decode_macros (line_header
, macro_offset
,
5140 comp_dir
, abfd
, cu
);
5142 do_cleanups (back_to
);
5145 /* For TUs we want to skip the first top level sibling if it's not the
5146 actual type being defined by this TU. In this case the first top
5147 level sibling is there to provide context only. */
5150 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5152 struct objfile
*objfile
= cu
->objfile
;
5153 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5155 struct attribute
*attr
;
5157 char *comp_dir
= NULL
;
5158 struct die_info
*child_die
;
5159 bfd
*abfd
= objfile
->obfd
;
5161 /* start_symtab needs a low pc, but we don't really have one.
5162 Do what read_file_scope would do in the absence of such info. */
5163 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5165 /* Find the filename. Do not use dwarf2_name here, since the filename
5166 is not a source language identifier. */
5167 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5169 name
= DW_STRING (attr
);
5171 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5173 comp_dir
= DW_STRING (attr
);
5174 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5176 comp_dir
= ldirname (name
);
5177 if (comp_dir
!= NULL
)
5178 make_cleanup (xfree
, comp_dir
);
5184 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5186 set_cu_language (DW_UNSND (attr
), cu
);
5188 /* This isn't technically needed today. It is done for symmetry
5189 with read_file_scope. */
5190 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5192 cu
->producer
= DW_STRING (attr
);
5194 /* We assume that we're processing GCC output. */
5195 processing_gcc_compilation
= 2;
5197 processing_has_namespace_info
= 0;
5199 start_symtab (name
, comp_dir
, lowpc
);
5200 record_debugformat ("DWARF 2");
5201 record_producer (cu
->producer
);
5203 /* Process the dies in the type unit. */
5204 if (die
->child
== NULL
)
5206 dump_die_for_error (die
);
5207 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5208 bfd_get_filename (abfd
));
5211 child_die
= die
->child
;
5213 while (child_die
&& child_die
->tag
)
5215 process_die (child_die
, cu
);
5217 child_die
= sibling_die (child_die
);
5220 do_cleanups (back_to
);
5224 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5225 struct dwarf2_cu
*cu
)
5227 struct function_range
*thisfn
;
5229 thisfn
= (struct function_range
*)
5230 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5231 thisfn
->name
= name
;
5232 thisfn
->lowpc
= lowpc
;
5233 thisfn
->highpc
= highpc
;
5234 thisfn
->seen_line
= 0;
5235 thisfn
->next
= NULL
;
5237 if (cu
->last_fn
== NULL
)
5238 cu
->first_fn
= thisfn
;
5240 cu
->last_fn
->next
= thisfn
;
5242 cu
->last_fn
= thisfn
;
5245 /* qsort helper for inherit_abstract_dies. */
5248 unsigned_int_compar (const void *ap
, const void *bp
)
5250 unsigned int a
= *(unsigned int *) ap
;
5251 unsigned int b
= *(unsigned int *) bp
;
5253 return (a
> b
) - (b
> a
);
5256 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5257 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5258 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5261 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5263 struct die_info
*child_die
;
5264 unsigned die_children_count
;
5265 /* CU offsets which were referenced by children of the current DIE. */
5267 unsigned *offsets_end
, *offsetp
;
5268 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5269 struct die_info
*origin_die
;
5270 /* Iterator of the ORIGIN_DIE children. */
5271 struct die_info
*origin_child_die
;
5272 struct cleanup
*cleanups
;
5273 struct attribute
*attr
;
5274 struct dwarf2_cu
*origin_cu
;
5275 struct pending
**origin_previous_list_in_scope
;
5277 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5281 /* Note that following die references may follow to a die in a
5285 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5287 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5289 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5290 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5292 if (die
->tag
!= origin_die
->tag
5293 && !(die
->tag
== DW_TAG_inlined_subroutine
5294 && origin_die
->tag
== DW_TAG_subprogram
))
5295 complaint (&symfile_complaints
,
5296 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5297 die
->offset
, origin_die
->offset
);
5299 child_die
= die
->child
;
5300 die_children_count
= 0;
5301 while (child_die
&& child_die
->tag
)
5303 child_die
= sibling_die (child_die
);
5304 die_children_count
++;
5306 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5307 cleanups
= make_cleanup (xfree
, offsets
);
5309 offsets_end
= offsets
;
5310 child_die
= die
->child
;
5311 while (child_die
&& child_die
->tag
)
5313 /* For each CHILD_DIE, find the corresponding child of
5314 ORIGIN_DIE. If there is more than one layer of
5315 DW_AT_abstract_origin, follow them all; there shouldn't be,
5316 but GCC versions at least through 4.4 generate this (GCC PR
5318 struct die_info
*child_origin_die
= child_die
;
5319 struct dwarf2_cu
*child_origin_cu
= cu
;
5323 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5327 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5331 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5332 counterpart may exist. */
5333 if (child_origin_die
!= child_die
)
5335 if (child_die
->tag
!= child_origin_die
->tag
5336 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5337 && child_origin_die
->tag
== DW_TAG_subprogram
))
5338 complaint (&symfile_complaints
,
5339 _("Child DIE 0x%x and its abstract origin 0x%x have "
5340 "different tags"), child_die
->offset
,
5341 child_origin_die
->offset
);
5342 if (child_origin_die
->parent
!= origin_die
)
5343 complaint (&symfile_complaints
,
5344 _("Child DIE 0x%x and its abstract origin 0x%x have "
5345 "different parents"), child_die
->offset
,
5346 child_origin_die
->offset
);
5348 *offsets_end
++ = child_origin_die
->offset
;
5350 child_die
= sibling_die (child_die
);
5352 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5353 unsigned_int_compar
);
5354 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5355 if (offsetp
[-1] == *offsetp
)
5356 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5357 "to DIE 0x%x as their abstract origin"),
5358 die
->offset
, *offsetp
);
5361 origin_child_die
= origin_die
->child
;
5362 while (origin_child_die
&& origin_child_die
->tag
)
5364 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5365 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5367 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5369 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5370 process_die (origin_child_die
, origin_cu
);
5372 origin_child_die
= sibling_die (origin_child_die
);
5374 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5376 do_cleanups (cleanups
);
5380 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5382 struct objfile
*objfile
= cu
->objfile
;
5383 struct context_stack
*new;
5386 struct die_info
*child_die
;
5387 struct attribute
*attr
, *call_line
, *call_file
;
5390 struct block
*block
;
5391 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5392 VEC (symbolp
) *template_args
= NULL
;
5393 struct template_symbol
*templ_func
= NULL
;
5397 /* If we do not have call site information, we can't show the
5398 caller of this inlined function. That's too confusing, so
5399 only use the scope for local variables. */
5400 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5401 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5402 if (call_line
== NULL
|| call_file
== NULL
)
5404 read_lexical_block_scope (die
, cu
);
5409 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5411 name
= dwarf2_name (die
, cu
);
5413 /* Ignore functions with missing or empty names. These are actually
5414 illegal according to the DWARF standard. */
5417 complaint (&symfile_complaints
,
5418 _("missing name for subprogram DIE at %d"), die
->offset
);
5422 /* Ignore functions with missing or invalid low and high pc attributes. */
5423 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5425 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5426 if (!attr
|| !DW_UNSND (attr
))
5427 complaint (&symfile_complaints
,
5428 _("cannot get low and high bounds for subprogram DIE at %d"),
5436 /* Record the function range for dwarf_decode_lines. */
5437 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5439 /* If we have any template arguments, then we must allocate a
5440 different sort of symbol. */
5441 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5443 if (child_die
->tag
== DW_TAG_template_type_param
5444 || child_die
->tag
== DW_TAG_template_value_param
)
5446 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5447 struct template_symbol
);
5448 templ_func
->base
.is_cplus_template_function
= 1;
5453 new = push_context (0, lowpc
);
5454 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5455 (struct symbol
*) templ_func
);
5457 /* If there is a location expression for DW_AT_frame_base, record
5459 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5461 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5462 expression is being recorded directly in the function's symbol
5463 and not in a separate frame-base object. I guess this hack is
5464 to avoid adding some sort of frame-base adjunct/annex to the
5465 function's symbol :-(. The problem with doing this is that it
5466 results in a function symbol with a location expression that
5467 has nothing to do with the location of the function, ouch! The
5468 relationship should be: a function's symbol has-a frame base; a
5469 frame-base has-a location expression. */
5470 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5472 cu
->list_in_scope
= &local_symbols
;
5474 if (die
->child
!= NULL
)
5476 child_die
= die
->child
;
5477 while (child_die
&& child_die
->tag
)
5479 if (child_die
->tag
== DW_TAG_template_type_param
5480 || child_die
->tag
== DW_TAG_template_value_param
)
5482 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5485 VEC_safe_push (symbolp
, template_args
, arg
);
5488 process_die (child_die
, cu
);
5489 child_die
= sibling_die (child_die
);
5493 inherit_abstract_dies (die
, cu
);
5495 /* If we have a DW_AT_specification, we might need to import using
5496 directives from the context of the specification DIE. See the
5497 comment in determine_prefix. */
5498 if (cu
->language
== language_cplus
5499 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5501 struct dwarf2_cu
*spec_cu
= cu
;
5502 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5506 child_die
= spec_die
->child
;
5507 while (child_die
&& child_die
->tag
)
5509 if (child_die
->tag
== DW_TAG_imported_module
)
5510 process_die (child_die
, spec_cu
);
5511 child_die
= sibling_die (child_die
);
5514 /* In some cases, GCC generates specification DIEs that
5515 themselves contain DW_AT_specification attributes. */
5516 spec_die
= die_specification (spec_die
, &spec_cu
);
5520 new = pop_context ();
5521 /* Make a block for the local symbols within. */
5522 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5523 lowpc
, highpc
, objfile
);
5525 /* For C++, set the block's scope. */
5526 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5527 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5528 determine_prefix (die
, cu
),
5529 processing_has_namespace_info
);
5531 /* If we have address ranges, record them. */
5532 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5534 /* Attach template arguments to function. */
5535 if (! VEC_empty (symbolp
, template_args
))
5537 gdb_assert (templ_func
!= NULL
);
5539 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5540 templ_func
->template_arguments
5541 = obstack_alloc (&objfile
->objfile_obstack
,
5542 (templ_func
->n_template_arguments
5543 * sizeof (struct symbol
*)));
5544 memcpy (templ_func
->template_arguments
,
5545 VEC_address (symbolp
, template_args
),
5546 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5547 VEC_free (symbolp
, template_args
);
5550 /* In C++, we can have functions nested inside functions (e.g., when
5551 a function declares a class that has methods). This means that
5552 when we finish processing a function scope, we may need to go
5553 back to building a containing block's symbol lists. */
5554 local_symbols
= new->locals
;
5555 param_symbols
= new->params
;
5556 using_directives
= new->using_directives
;
5558 /* If we've finished processing a top-level function, subsequent
5559 symbols go in the file symbol list. */
5560 if (outermost_context_p ())
5561 cu
->list_in_scope
= &file_symbols
;
5564 /* Process all the DIES contained within a lexical block scope. Start
5565 a new scope, process the dies, and then close the scope. */
5568 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5570 struct objfile
*objfile
= cu
->objfile
;
5571 struct context_stack
*new;
5572 CORE_ADDR lowpc
, highpc
;
5573 struct die_info
*child_die
;
5576 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5578 /* Ignore blocks with missing or invalid low and high pc attributes. */
5579 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5580 as multiple lexical blocks? Handling children in a sane way would
5581 be nasty. Might be easier to properly extend generic blocks to
5583 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5588 push_context (0, lowpc
);
5589 if (die
->child
!= NULL
)
5591 child_die
= die
->child
;
5592 while (child_die
&& child_die
->tag
)
5594 process_die (child_die
, cu
);
5595 child_die
= sibling_die (child_die
);
5598 new = pop_context ();
5600 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5603 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5606 /* Note that recording ranges after traversing children, as we
5607 do here, means that recording a parent's ranges entails
5608 walking across all its children's ranges as they appear in
5609 the address map, which is quadratic behavior.
5611 It would be nicer to record the parent's ranges before
5612 traversing its children, simply overriding whatever you find
5613 there. But since we don't even decide whether to create a
5614 block until after we've traversed its children, that's hard
5616 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5618 local_symbols
= new->locals
;
5619 using_directives
= new->using_directives
;
5622 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5623 Return 1 if the attributes are present and valid, otherwise, return 0.
5624 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5627 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5628 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5629 struct partial_symtab
*ranges_pst
)
5631 struct objfile
*objfile
= cu
->objfile
;
5632 struct comp_unit_head
*cu_header
= &cu
->header
;
5633 bfd
*obfd
= objfile
->obfd
;
5634 unsigned int addr_size
= cu_header
->addr_size
;
5635 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5636 /* Base address selection entry. */
5647 found_base
= cu
->base_known
;
5648 base
= cu
->base_address
;
5650 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5651 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5653 complaint (&symfile_complaints
,
5654 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5658 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5660 /* Read in the largest possible address. */
5661 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5662 if ((marker
& mask
) == mask
)
5664 /* If we found the largest possible address, then
5665 read the base address. */
5666 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5667 buffer
+= 2 * addr_size
;
5668 offset
+= 2 * addr_size
;
5674 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5678 CORE_ADDR range_beginning
, range_end
;
5680 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5681 buffer
+= addr_size
;
5682 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5683 buffer
+= addr_size
;
5684 offset
+= 2 * addr_size
;
5686 /* An end of list marker is a pair of zero addresses. */
5687 if (range_beginning
== 0 && range_end
== 0)
5688 /* Found the end of list entry. */
5691 /* Each base address selection entry is a pair of 2 values.
5692 The first is the largest possible address, the second is
5693 the base address. Check for a base address here. */
5694 if ((range_beginning
& mask
) == mask
)
5696 /* If we found the largest possible address, then
5697 read the base address. */
5698 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5705 /* We have no valid base address for the ranges
5707 complaint (&symfile_complaints
,
5708 _("Invalid .debug_ranges data (no base address)"));
5712 range_beginning
+= base
;
5715 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5716 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5717 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5720 /* FIXME: This is recording everything as a low-high
5721 segment of consecutive addresses. We should have a
5722 data structure for discontiguous block ranges
5726 low
= range_beginning
;
5732 if (range_beginning
< low
)
5733 low
= range_beginning
;
5734 if (range_end
> high
)
5740 /* If the first entry is an end-of-list marker, the range
5741 describes an empty scope, i.e. no instructions. */
5747 *high_return
= high
;
5751 /* Get low and high pc attributes from a die. Return 1 if the attributes
5752 are present and valid, otherwise, return 0. Return -1 if the range is
5753 discontinuous, i.e. derived from DW_AT_ranges information. */
5755 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5756 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5757 struct partial_symtab
*pst
)
5759 struct attribute
*attr
;
5764 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5767 high
= DW_ADDR (attr
);
5768 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5770 low
= DW_ADDR (attr
);
5772 /* Found high w/o low attribute. */
5775 /* Found consecutive range of addresses. */
5780 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5783 /* Value of the DW_AT_ranges attribute is the offset in the
5784 .debug_ranges section. */
5785 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5787 /* Found discontinuous range of addresses. */
5795 /* When using the GNU linker, .gnu.linkonce. sections are used to
5796 eliminate duplicate copies of functions and vtables and such.
5797 The linker will arbitrarily choose one and discard the others.
5798 The AT_*_pc values for such functions refer to local labels in
5799 these sections. If the section from that file was discarded, the
5800 labels are not in the output, so the relocs get a value of 0.
5801 If this is a discarded function, mark the pc bounds as invalid,
5802 so that GDB will ignore it. */
5803 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5811 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5812 its low and high PC addresses. Do nothing if these addresses could not
5813 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5814 and HIGHPC to the high address if greater than HIGHPC. */
5817 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5818 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5819 struct dwarf2_cu
*cu
)
5821 CORE_ADDR low
, high
;
5822 struct die_info
*child
= die
->child
;
5824 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5826 *lowpc
= min (*lowpc
, low
);
5827 *highpc
= max (*highpc
, high
);
5830 /* If the language does not allow nested subprograms (either inside
5831 subprograms or lexical blocks), we're done. */
5832 if (cu
->language
!= language_ada
)
5835 /* Check all the children of the given DIE. If it contains nested
5836 subprograms, then check their pc bounds. Likewise, we need to
5837 check lexical blocks as well, as they may also contain subprogram
5839 while (child
&& child
->tag
)
5841 if (child
->tag
== DW_TAG_subprogram
5842 || child
->tag
== DW_TAG_lexical_block
)
5843 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5844 child
= sibling_die (child
);
5848 /* Get the low and high pc's represented by the scope DIE, and store
5849 them in *LOWPC and *HIGHPC. If the correct values can't be
5850 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5853 get_scope_pc_bounds (struct die_info
*die
,
5854 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5855 struct dwarf2_cu
*cu
)
5857 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5858 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5859 CORE_ADDR current_low
, current_high
;
5861 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5863 best_low
= current_low
;
5864 best_high
= current_high
;
5868 struct die_info
*child
= die
->child
;
5870 while (child
&& child
->tag
)
5872 switch (child
->tag
) {
5873 case DW_TAG_subprogram
:
5874 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5876 case DW_TAG_namespace
:
5878 /* FIXME: carlton/2004-01-16: Should we do this for
5879 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5880 that current GCC's always emit the DIEs corresponding
5881 to definitions of methods of classes as children of a
5882 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5883 the DIEs giving the declarations, which could be
5884 anywhere). But I don't see any reason why the
5885 standards says that they have to be there. */
5886 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5888 if (current_low
!= ((CORE_ADDR
) -1))
5890 best_low
= min (best_low
, current_low
);
5891 best_high
= max (best_high
, current_high
);
5899 child
= sibling_die (child
);
5904 *highpc
= best_high
;
5907 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5910 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5911 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5913 struct attribute
*attr
;
5915 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5918 CORE_ADDR high
= DW_ADDR (attr
);
5920 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5923 CORE_ADDR low
= DW_ADDR (attr
);
5925 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5929 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5932 bfd
*obfd
= cu
->objfile
->obfd
;
5934 /* The value of the DW_AT_ranges attribute is the offset of the
5935 address range list in the .debug_ranges section. */
5936 unsigned long offset
= DW_UNSND (attr
);
5937 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5939 /* For some target architectures, but not others, the
5940 read_address function sign-extends the addresses it returns.
5941 To recognize base address selection entries, we need a
5943 unsigned int addr_size
= cu
->header
.addr_size
;
5944 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5946 /* The base address, to which the next pair is relative. Note
5947 that this 'base' is a DWARF concept: most entries in a range
5948 list are relative, to reduce the number of relocs against the
5949 debugging information. This is separate from this function's
5950 'baseaddr' argument, which GDB uses to relocate debugging
5951 information from a shared library based on the address at
5952 which the library was loaded. */
5953 CORE_ADDR base
= cu
->base_address
;
5954 int base_known
= cu
->base_known
;
5956 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5957 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5959 complaint (&symfile_complaints
,
5960 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5967 unsigned int bytes_read
;
5968 CORE_ADDR start
, end
;
5970 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5971 buffer
+= bytes_read
;
5972 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5973 buffer
+= bytes_read
;
5975 /* Did we find the end of the range list? */
5976 if (start
== 0 && end
== 0)
5979 /* Did we find a base address selection entry? */
5980 else if ((start
& base_select_mask
) == base_select_mask
)
5986 /* We found an ordinary address range. */
5991 complaint (&symfile_complaints
,
5992 _("Invalid .debug_ranges data (no base address)"));
5996 record_block_range (block
,
5997 baseaddr
+ base
+ start
,
5998 baseaddr
+ base
+ end
- 1);
6004 /* Add an aggregate field to the field list. */
6007 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6008 struct dwarf2_cu
*cu
)
6010 struct objfile
*objfile
= cu
->objfile
;
6011 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6012 struct nextfield
*new_field
;
6013 struct attribute
*attr
;
6015 char *fieldname
= "";
6017 /* Allocate a new field list entry and link it in. */
6018 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6019 make_cleanup (xfree
, new_field
);
6020 memset (new_field
, 0, sizeof (struct nextfield
));
6022 if (die
->tag
== DW_TAG_inheritance
)
6024 new_field
->next
= fip
->baseclasses
;
6025 fip
->baseclasses
= new_field
;
6029 new_field
->next
= fip
->fields
;
6030 fip
->fields
= new_field
;
6034 /* Handle accessibility and virtuality of field.
6035 The default accessibility for members is public, the default
6036 accessibility for inheritance is private. */
6037 if (die
->tag
!= DW_TAG_inheritance
)
6038 new_field
->accessibility
= DW_ACCESS_public
;
6040 new_field
->accessibility
= DW_ACCESS_private
;
6041 new_field
->virtuality
= DW_VIRTUALITY_none
;
6043 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6045 new_field
->accessibility
= DW_UNSND (attr
);
6046 if (new_field
->accessibility
!= DW_ACCESS_public
)
6047 fip
->non_public_fields
= 1;
6048 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6050 new_field
->virtuality
= DW_UNSND (attr
);
6052 fp
= &new_field
->field
;
6054 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6056 /* Data member other than a C++ static data member. */
6058 /* Get type of field. */
6059 fp
->type
= die_type (die
, cu
);
6061 SET_FIELD_BITPOS (*fp
, 0);
6063 /* Get bit size of field (zero if none). */
6064 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6067 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6071 FIELD_BITSIZE (*fp
) = 0;
6074 /* Get bit offset of field. */
6075 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6078 int byte_offset
= 0;
6080 if (attr_form_is_section_offset (attr
))
6081 dwarf2_complex_location_expr_complaint ();
6082 else if (attr_form_is_constant (attr
))
6083 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6084 else if (attr_form_is_block (attr
))
6085 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6087 dwarf2_complex_location_expr_complaint ();
6089 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6091 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6094 if (gdbarch_bits_big_endian (gdbarch
))
6096 /* For big endian bits, the DW_AT_bit_offset gives the
6097 additional bit offset from the MSB of the containing
6098 anonymous object to the MSB of the field. We don't
6099 have to do anything special since we don't need to
6100 know the size of the anonymous object. */
6101 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6105 /* For little endian bits, compute the bit offset to the
6106 MSB of the anonymous object, subtract off the number of
6107 bits from the MSB of the field to the MSB of the
6108 object, and then subtract off the number of bits of
6109 the field itself. The result is the bit offset of
6110 the LSB of the field. */
6112 int bit_offset
= DW_UNSND (attr
);
6114 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6117 /* The size of the anonymous object containing
6118 the bit field is explicit, so use the
6119 indicated size (in bytes). */
6120 anonymous_size
= DW_UNSND (attr
);
6124 /* The size of the anonymous object containing
6125 the bit field must be inferred from the type
6126 attribute of the data member containing the
6128 anonymous_size
= TYPE_LENGTH (fp
->type
);
6130 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6131 - bit_offset
- FIELD_BITSIZE (*fp
);
6135 /* Get name of field. */
6136 fieldname
= dwarf2_name (die
, cu
);
6137 if (fieldname
== NULL
)
6140 /* The name is already allocated along with this objfile, so we don't
6141 need to duplicate it for the type. */
6142 fp
->name
= fieldname
;
6144 /* Change accessibility for artificial fields (e.g. virtual table
6145 pointer or virtual base class pointer) to private. */
6146 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6148 FIELD_ARTIFICIAL (*fp
) = 1;
6149 new_field
->accessibility
= DW_ACCESS_private
;
6150 fip
->non_public_fields
= 1;
6153 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6155 /* C++ static member. */
6157 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6158 is a declaration, but all versions of G++ as of this writing
6159 (so through at least 3.2.1) incorrectly generate
6160 DW_TAG_variable tags. */
6164 /* Get name of field. */
6165 fieldname
= dwarf2_name (die
, cu
);
6166 if (fieldname
== NULL
)
6169 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6171 /* Only create a symbol if this is an external value.
6172 new_symbol checks this and puts the value in the global symbol
6173 table, which we want. If it is not external, new_symbol
6174 will try to put the value in cu->list_in_scope which is wrong. */
6175 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6177 /* A static const member, not much different than an enum as far as
6178 we're concerned, except that we can support more types. */
6179 new_symbol (die
, NULL
, cu
);
6182 /* Get physical name. */
6183 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6185 /* The name is already allocated along with this objfile, so we don't
6186 need to duplicate it for the type. */
6187 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6188 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6189 FIELD_NAME (*fp
) = fieldname
;
6191 else if (die
->tag
== DW_TAG_inheritance
)
6193 /* C++ base class field. */
6194 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6197 int byte_offset
= 0;
6199 if (attr_form_is_section_offset (attr
))
6200 dwarf2_complex_location_expr_complaint ();
6201 else if (attr_form_is_constant (attr
))
6202 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6203 else if (attr_form_is_block (attr
))
6204 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6206 dwarf2_complex_location_expr_complaint ();
6208 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6210 FIELD_BITSIZE (*fp
) = 0;
6211 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6212 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6213 fip
->nbaseclasses
++;
6217 /* Add a typedef defined in the scope of the FIP's class. */
6220 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6221 struct dwarf2_cu
*cu
)
6223 struct objfile
*objfile
= cu
->objfile
;
6224 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6225 struct typedef_field_list
*new_field
;
6226 struct attribute
*attr
;
6227 struct typedef_field
*fp
;
6228 char *fieldname
= "";
6230 /* Allocate a new field list entry and link it in. */
6231 new_field
= xzalloc (sizeof (*new_field
));
6232 make_cleanup (xfree
, new_field
);
6234 gdb_assert (die
->tag
== DW_TAG_typedef
);
6236 fp
= &new_field
->field
;
6238 /* Get name of field. */
6239 fp
->name
= dwarf2_name (die
, cu
);
6240 if (fp
->name
== NULL
)
6243 fp
->type
= read_type_die (die
, cu
);
6245 new_field
->next
= fip
->typedef_field_list
;
6246 fip
->typedef_field_list
= new_field
;
6247 fip
->typedef_field_list_count
++;
6250 /* Create the vector of fields, and attach it to the type. */
6253 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6254 struct dwarf2_cu
*cu
)
6256 int nfields
= fip
->nfields
;
6258 /* Record the field count, allocate space for the array of fields,
6259 and create blank accessibility bitfields if necessary. */
6260 TYPE_NFIELDS (type
) = nfields
;
6261 TYPE_FIELDS (type
) = (struct field
*)
6262 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6263 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6265 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6267 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6269 TYPE_FIELD_PRIVATE_BITS (type
) =
6270 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6271 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6273 TYPE_FIELD_PROTECTED_BITS (type
) =
6274 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6275 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6277 TYPE_FIELD_IGNORE_BITS (type
) =
6278 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6279 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6282 /* If the type has baseclasses, allocate and clear a bit vector for
6283 TYPE_FIELD_VIRTUAL_BITS. */
6284 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6286 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6287 unsigned char *pointer
;
6289 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6290 pointer
= TYPE_ALLOC (type
, num_bytes
);
6291 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6292 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6293 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6296 /* Copy the saved-up fields into the field vector. Start from the head
6297 of the list, adding to the tail of the field array, so that they end
6298 up in the same order in the array in which they were added to the list. */
6299 while (nfields
-- > 0)
6301 struct nextfield
*fieldp
;
6305 fieldp
= fip
->fields
;
6306 fip
->fields
= fieldp
->next
;
6310 fieldp
= fip
->baseclasses
;
6311 fip
->baseclasses
= fieldp
->next
;
6314 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6315 switch (fieldp
->accessibility
)
6317 case DW_ACCESS_private
:
6318 if (cu
->language
!= language_ada
)
6319 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6322 case DW_ACCESS_protected
:
6323 if (cu
->language
!= language_ada
)
6324 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6327 case DW_ACCESS_public
:
6331 /* Unknown accessibility. Complain and treat it as public. */
6333 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6334 fieldp
->accessibility
);
6338 if (nfields
< fip
->nbaseclasses
)
6340 switch (fieldp
->virtuality
)
6342 case DW_VIRTUALITY_virtual
:
6343 case DW_VIRTUALITY_pure_virtual
:
6344 if (cu
->language
== language_ada
)
6345 error ("unexpected virtuality in component of Ada type");
6346 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6353 /* Add a member function to the proper fieldlist. */
6356 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6357 struct type
*type
, struct dwarf2_cu
*cu
)
6359 struct objfile
*objfile
= cu
->objfile
;
6360 struct attribute
*attr
;
6361 struct fnfieldlist
*flp
;
6363 struct fn_field
*fnp
;
6365 struct nextfnfield
*new_fnfield
;
6366 struct type
*this_type
;
6368 if (cu
->language
== language_ada
)
6369 error ("unexpected member function in Ada type");
6371 /* Get name of member function. */
6372 fieldname
= dwarf2_name (die
, cu
);
6373 if (fieldname
== NULL
)
6376 /* Look up member function name in fieldlist. */
6377 for (i
= 0; i
< fip
->nfnfields
; i
++)
6379 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6383 /* Create new list element if necessary. */
6384 if (i
< fip
->nfnfields
)
6385 flp
= &fip
->fnfieldlists
[i
];
6388 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6390 fip
->fnfieldlists
= (struct fnfieldlist
*)
6391 xrealloc (fip
->fnfieldlists
,
6392 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6393 * sizeof (struct fnfieldlist
));
6394 if (fip
->nfnfields
== 0)
6395 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6397 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6398 flp
->name
= fieldname
;
6401 i
= fip
->nfnfields
++;
6404 /* Create a new member function field and chain it to the field list
6406 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6407 make_cleanup (xfree
, new_fnfield
);
6408 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6409 new_fnfield
->next
= flp
->head
;
6410 flp
->head
= new_fnfield
;
6413 /* Fill in the member function field info. */
6414 fnp
= &new_fnfield
->fnfield
;
6416 /* Delay processing of the physname until later. */
6417 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6419 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6424 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6425 fnp
->physname
= physname
? physname
: "";
6428 fnp
->type
= alloc_type (objfile
);
6429 this_type
= read_type_die (die
, cu
);
6430 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6432 int nparams
= TYPE_NFIELDS (this_type
);
6434 /* TYPE is the domain of this method, and THIS_TYPE is the type
6435 of the method itself (TYPE_CODE_METHOD). */
6436 smash_to_method_type (fnp
->type
, type
,
6437 TYPE_TARGET_TYPE (this_type
),
6438 TYPE_FIELDS (this_type
),
6439 TYPE_NFIELDS (this_type
),
6440 TYPE_VARARGS (this_type
));
6442 /* Handle static member functions.
6443 Dwarf2 has no clean way to discern C++ static and non-static
6444 member functions. G++ helps GDB by marking the first
6445 parameter for non-static member functions (which is the
6446 this pointer) as artificial. We obtain this information
6447 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6448 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6449 fnp
->voffset
= VOFFSET_STATIC
;
6452 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6453 dwarf2_full_name (fieldname
, die
, cu
));
6455 /* Get fcontext from DW_AT_containing_type if present. */
6456 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6457 fnp
->fcontext
= die_containing_type (die
, cu
);
6459 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6460 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6462 /* Get accessibility. */
6463 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6466 switch (DW_UNSND (attr
))
6468 case DW_ACCESS_private
:
6469 fnp
->is_private
= 1;
6471 case DW_ACCESS_protected
:
6472 fnp
->is_protected
= 1;
6477 /* Check for artificial methods. */
6478 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6479 if (attr
&& DW_UNSND (attr
) != 0)
6480 fnp
->is_artificial
= 1;
6482 /* Get index in virtual function table if it is a virtual member
6483 function. For older versions of GCC, this is an offset in the
6484 appropriate virtual table, as specified by DW_AT_containing_type.
6485 For everyone else, it is an expression to be evaluated relative
6486 to the object address. */
6488 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6491 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6493 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6495 /* Old-style GCC. */
6496 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6498 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6499 || (DW_BLOCK (attr
)->size
> 1
6500 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6501 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6503 struct dwarf_block blk
;
6506 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6508 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6509 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6510 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6511 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6512 dwarf2_complex_location_expr_complaint ();
6514 fnp
->voffset
/= cu
->header
.addr_size
;
6518 dwarf2_complex_location_expr_complaint ();
6521 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6523 else if (attr_form_is_section_offset (attr
))
6525 dwarf2_complex_location_expr_complaint ();
6529 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6535 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6536 if (attr
&& DW_UNSND (attr
))
6538 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6539 complaint (&symfile_complaints
,
6540 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6541 fieldname
, die
->offset
);
6542 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6543 TYPE_CPLUS_DYNAMIC (type
) = 1;
6548 /* Create the vector of member function fields, and attach it to the type. */
6551 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6552 struct dwarf2_cu
*cu
)
6554 struct fnfieldlist
*flp
;
6555 int total_length
= 0;
6558 if (cu
->language
== language_ada
)
6559 error ("unexpected member functions in Ada type");
6561 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6562 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6563 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6565 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6567 struct nextfnfield
*nfp
= flp
->head
;
6568 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6571 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6572 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6573 fn_flp
->fn_fields
= (struct fn_field
*)
6574 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6575 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6576 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6578 total_length
+= flp
->length
;
6581 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6582 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6585 /* Returns non-zero if NAME is the name of a vtable member in CU's
6586 language, zero otherwise. */
6588 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6590 static const char vptr
[] = "_vptr";
6591 static const char vtable
[] = "vtable";
6593 /* Look for the C++ and Java forms of the vtable. */
6594 if ((cu
->language
== language_java
6595 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6596 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6597 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6603 /* GCC outputs unnamed structures that are really pointers to member
6604 functions, with the ABI-specified layout. If TYPE describes
6605 such a structure, smash it into a member function type.
6607 GCC shouldn't do this; it should just output pointer to member DIEs.
6608 This is GCC PR debug/28767. */
6611 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6613 struct type
*pfn_type
, *domain_type
, *new_type
;
6615 /* Check for a structure with no name and two children. */
6616 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6619 /* Check for __pfn and __delta members. */
6620 if (TYPE_FIELD_NAME (type
, 0) == NULL
6621 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6622 || TYPE_FIELD_NAME (type
, 1) == NULL
6623 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6626 /* Find the type of the method. */
6627 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6628 if (pfn_type
== NULL
6629 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6630 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6633 /* Look for the "this" argument. */
6634 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6635 if (TYPE_NFIELDS (pfn_type
) == 0
6636 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6637 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6640 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6641 new_type
= alloc_type (objfile
);
6642 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6643 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6644 TYPE_VARARGS (pfn_type
));
6645 smash_to_methodptr_type (type
, new_type
);
6648 /* Called when we find the DIE that starts a structure or union scope
6649 (definition) to create a type for the structure or union. Fill in
6650 the type's name and general properties; the members will not be
6651 processed until process_structure_type.
6653 NOTE: we need to call these functions regardless of whether or not the
6654 DIE has a DW_AT_name attribute, since it might be an anonymous
6655 structure or union. This gets the type entered into our set of
6658 However, if the structure is incomplete (an opaque struct/union)
6659 then suppress creating a symbol table entry for it since gdb only
6660 wants to find the one with the complete definition. Note that if
6661 it is complete, we just call new_symbol, which does it's own
6662 checking about whether the struct/union is anonymous or not (and
6663 suppresses creating a symbol table entry itself). */
6665 static struct type
*
6666 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6668 struct objfile
*objfile
= cu
->objfile
;
6670 struct attribute
*attr
;
6673 /* If the definition of this type lives in .debug_types, read that type.
6674 Don't follow DW_AT_specification though, that will take us back up
6675 the chain and we want to go down. */
6676 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6679 struct dwarf2_cu
*type_cu
= cu
;
6680 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6682 /* We could just recurse on read_structure_type, but we need to call
6683 get_die_type to ensure only one type for this DIE is created.
6684 This is important, for example, because for c++ classes we need
6685 TYPE_NAME set which is only done by new_symbol. Blech. */
6686 type
= read_type_die (type_die
, type_cu
);
6688 /* TYPE_CU may not be the same as CU.
6689 Ensure TYPE is recorded in CU's type_hash table. */
6690 return set_die_type (die
, type
, cu
);
6693 type
= alloc_type (objfile
);
6694 INIT_CPLUS_SPECIFIC (type
);
6696 name
= dwarf2_name (die
, cu
);
6699 if (cu
->language
== language_cplus
6700 || cu
->language
== language_java
)
6702 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6704 /* dwarf2_full_name might have already finished building the DIE's
6705 type. If so, there is no need to continue. */
6706 if (get_die_type (die
, cu
) != NULL
)
6707 return get_die_type (die
, cu
);
6709 TYPE_TAG_NAME (type
) = full_name
;
6710 if (die
->tag
== DW_TAG_structure_type
6711 || die
->tag
== DW_TAG_class_type
)
6712 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6716 /* The name is already allocated along with this objfile, so
6717 we don't need to duplicate it for the type. */
6718 TYPE_TAG_NAME (type
) = (char *) name
;
6719 if (die
->tag
== DW_TAG_class_type
)
6720 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6724 if (die
->tag
== DW_TAG_structure_type
)
6726 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6728 else if (die
->tag
== DW_TAG_union_type
)
6730 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6734 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6737 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6738 TYPE_DECLARED_CLASS (type
) = 1;
6740 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6743 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6747 TYPE_LENGTH (type
) = 0;
6750 TYPE_STUB_SUPPORTED (type
) = 1;
6751 if (die_is_declaration (die
, cu
))
6752 TYPE_STUB (type
) = 1;
6753 else if (attr
== NULL
&& die
->child
== NULL
6754 && producer_is_realview (cu
->producer
))
6755 /* RealView does not output the required DW_AT_declaration
6756 on incomplete types. */
6757 TYPE_STUB (type
) = 1;
6759 /* We need to add the type field to the die immediately so we don't
6760 infinitely recurse when dealing with pointers to the structure
6761 type within the structure itself. */
6762 set_die_type (die
, type
, cu
);
6764 /* set_die_type should be already done. */
6765 set_descriptive_type (type
, die
, cu
);
6770 /* Finish creating a structure or union type, including filling in
6771 its members and creating a symbol for it. */
6774 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6776 struct objfile
*objfile
= cu
->objfile
;
6777 struct die_info
*child_die
= die
->child
;
6780 type
= get_die_type (die
, cu
);
6782 type
= read_structure_type (die
, cu
);
6784 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6786 struct field_info fi
;
6787 struct die_info
*child_die
;
6788 VEC (symbolp
) *template_args
= NULL
;
6789 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6791 memset (&fi
, 0, sizeof (struct field_info
));
6793 child_die
= die
->child
;
6795 while (child_die
&& child_die
->tag
)
6797 if (child_die
->tag
== DW_TAG_member
6798 || child_die
->tag
== DW_TAG_variable
)
6800 /* NOTE: carlton/2002-11-05: A C++ static data member
6801 should be a DW_TAG_member that is a declaration, but
6802 all versions of G++ as of this writing (so through at
6803 least 3.2.1) incorrectly generate DW_TAG_variable
6804 tags for them instead. */
6805 dwarf2_add_field (&fi
, child_die
, cu
);
6807 else if (child_die
->tag
== DW_TAG_subprogram
)
6809 /* C++ member function. */
6810 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6812 else if (child_die
->tag
== DW_TAG_inheritance
)
6814 /* C++ base class field. */
6815 dwarf2_add_field (&fi
, child_die
, cu
);
6817 else if (child_die
->tag
== DW_TAG_typedef
)
6818 dwarf2_add_typedef (&fi
, child_die
, cu
);
6819 else if (child_die
->tag
== DW_TAG_template_type_param
6820 || child_die
->tag
== DW_TAG_template_value_param
)
6822 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6825 VEC_safe_push (symbolp
, template_args
, arg
);
6828 child_die
= sibling_die (child_die
);
6831 /* Attach template arguments to type. */
6832 if (! VEC_empty (symbolp
, template_args
))
6834 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6835 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6836 = VEC_length (symbolp
, template_args
);
6837 TYPE_TEMPLATE_ARGUMENTS (type
)
6838 = obstack_alloc (&objfile
->objfile_obstack
,
6839 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6840 * sizeof (struct symbol
*)));
6841 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6842 VEC_address (symbolp
, template_args
),
6843 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6844 * sizeof (struct symbol
*)));
6845 VEC_free (symbolp
, template_args
);
6848 /* Attach fields and member functions to the type. */
6850 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6853 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6855 /* Get the type which refers to the base class (possibly this
6856 class itself) which contains the vtable pointer for the current
6857 class from the DW_AT_containing_type attribute. This use of
6858 DW_AT_containing_type is a GNU extension. */
6860 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6862 struct type
*t
= die_containing_type (die
, cu
);
6864 TYPE_VPTR_BASETYPE (type
) = t
;
6869 /* Our own class provides vtbl ptr. */
6870 for (i
= TYPE_NFIELDS (t
) - 1;
6871 i
>= TYPE_N_BASECLASSES (t
);
6874 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6876 if (is_vtable_name (fieldname
, cu
))
6878 TYPE_VPTR_FIELDNO (type
) = i
;
6883 /* Complain if virtual function table field not found. */
6884 if (i
< TYPE_N_BASECLASSES (t
))
6885 complaint (&symfile_complaints
,
6886 _("virtual function table pointer not found when defining class '%s'"),
6887 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6892 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6895 else if (cu
->producer
6896 && strncmp (cu
->producer
,
6897 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6899 /* The IBM XLC compiler does not provide direct indication
6900 of the containing type, but the vtable pointer is
6901 always named __vfp. */
6905 for (i
= TYPE_NFIELDS (type
) - 1;
6906 i
>= TYPE_N_BASECLASSES (type
);
6909 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6911 TYPE_VPTR_FIELDNO (type
) = i
;
6912 TYPE_VPTR_BASETYPE (type
) = type
;
6919 /* Copy fi.typedef_field_list linked list elements content into the
6920 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6921 if (fi
.typedef_field_list
)
6923 int i
= fi
.typedef_field_list_count
;
6925 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6926 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6927 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6928 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6930 /* Reverse the list order to keep the debug info elements order. */
6933 struct typedef_field
*dest
, *src
;
6935 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6936 src
= &fi
.typedef_field_list
->field
;
6937 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6942 do_cleanups (back_to
);
6945 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6947 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6948 snapshots) has been known to create a die giving a declaration
6949 for a class that has, as a child, a die giving a definition for a
6950 nested class. So we have to process our children even if the
6951 current die is a declaration. Normally, of course, a declaration
6952 won't have any children at all. */
6954 while (child_die
!= NULL
&& child_die
->tag
)
6956 if (child_die
->tag
== DW_TAG_member
6957 || child_die
->tag
== DW_TAG_variable
6958 || child_die
->tag
== DW_TAG_inheritance
6959 || child_die
->tag
== DW_TAG_template_value_param
6960 || child_die
->tag
== DW_TAG_template_type_param
)
6965 process_die (child_die
, cu
);
6967 child_die
= sibling_die (child_die
);
6970 /* Do not consider external references. According to the DWARF standard,
6971 these DIEs are identified by the fact that they have no byte_size
6972 attribute, and a declaration attribute. */
6973 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
6974 || !die_is_declaration (die
, cu
))
6975 new_symbol (die
, type
, cu
);
6978 /* Given a DW_AT_enumeration_type die, set its type. We do not
6979 complete the type's fields yet, or create any symbols. */
6981 static struct type
*
6982 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6984 struct objfile
*objfile
= cu
->objfile
;
6986 struct attribute
*attr
;
6989 /* If the definition of this type lives in .debug_types, read that type.
6990 Don't follow DW_AT_specification though, that will take us back up
6991 the chain and we want to go down. */
6992 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6995 struct dwarf2_cu
*type_cu
= cu
;
6996 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6998 type
= read_type_die (type_die
, type_cu
);
7000 /* TYPE_CU may not be the same as CU.
7001 Ensure TYPE is recorded in CU's type_hash table. */
7002 return set_die_type (die
, type
, cu
);
7005 type
= alloc_type (objfile
);
7007 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7008 name
= dwarf2_full_name (NULL
, die
, cu
);
7010 TYPE_TAG_NAME (type
) = (char *) name
;
7012 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7015 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7019 TYPE_LENGTH (type
) = 0;
7022 /* The enumeration DIE can be incomplete. In Ada, any type can be
7023 declared as private in the package spec, and then defined only
7024 inside the package body. Such types are known as Taft Amendment
7025 Types. When another package uses such a type, an incomplete DIE
7026 may be generated by the compiler. */
7027 if (die_is_declaration (die
, cu
))
7028 TYPE_STUB (type
) = 1;
7030 return set_die_type (die
, type
, cu
);
7033 /* Given a pointer to a die which begins an enumeration, process all
7034 the dies that define the members of the enumeration, and create the
7035 symbol for the enumeration type.
7037 NOTE: We reverse the order of the element list. */
7040 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7042 struct type
*this_type
;
7044 this_type
= get_die_type (die
, cu
);
7045 if (this_type
== NULL
)
7046 this_type
= read_enumeration_type (die
, cu
);
7048 if (die
->child
!= NULL
)
7050 struct die_info
*child_die
;
7052 struct field
*fields
= NULL
;
7054 int unsigned_enum
= 1;
7057 child_die
= die
->child
;
7058 while (child_die
&& child_die
->tag
)
7060 if (child_die
->tag
!= DW_TAG_enumerator
)
7062 process_die (child_die
, cu
);
7066 name
= dwarf2_name (child_die
, cu
);
7069 sym
= new_symbol (child_die
, this_type
, cu
);
7070 if (SYMBOL_VALUE (sym
) < 0)
7073 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7075 fields
= (struct field
*)
7077 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7078 * sizeof (struct field
));
7081 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7082 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7083 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7084 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7090 child_die
= sibling_die (child_die
);
7095 TYPE_NFIELDS (this_type
) = num_fields
;
7096 TYPE_FIELDS (this_type
) = (struct field
*)
7097 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7098 memcpy (TYPE_FIELDS (this_type
), fields
,
7099 sizeof (struct field
) * num_fields
);
7103 TYPE_UNSIGNED (this_type
) = 1;
7106 new_symbol (die
, this_type
, cu
);
7109 /* Extract all information from a DW_TAG_array_type DIE and put it in
7110 the DIE's type field. For now, this only handles one dimensional
7113 static struct type
*
7114 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7116 struct objfile
*objfile
= cu
->objfile
;
7117 struct die_info
*child_die
;
7119 struct type
*element_type
, *range_type
, *index_type
;
7120 struct type
**range_types
= NULL
;
7121 struct attribute
*attr
;
7123 struct cleanup
*back_to
;
7126 element_type
= die_type (die
, cu
);
7128 /* The die_type call above may have already set the type for this DIE. */
7129 type
= get_die_type (die
, cu
);
7133 /* Irix 6.2 native cc creates array types without children for
7134 arrays with unspecified length. */
7135 if (die
->child
== NULL
)
7137 index_type
= objfile_type (objfile
)->builtin_int
;
7138 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7139 type
= create_array_type (NULL
, element_type
, range_type
);
7140 return set_die_type (die
, type
, cu
);
7143 back_to
= make_cleanup (null_cleanup
, NULL
);
7144 child_die
= die
->child
;
7145 while (child_die
&& child_die
->tag
)
7147 if (child_die
->tag
== DW_TAG_subrange_type
)
7149 struct type
*child_type
= read_type_die (child_die
, cu
);
7151 if (child_type
!= NULL
)
7153 /* The range type was succesfully read. Save it for
7154 the array type creation. */
7155 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7157 range_types
= (struct type
**)
7158 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7159 * sizeof (struct type
*));
7161 make_cleanup (free_current_contents
, &range_types
);
7163 range_types
[ndim
++] = child_type
;
7166 child_die
= sibling_die (child_die
);
7169 /* Dwarf2 dimensions are output from left to right, create the
7170 necessary array types in backwards order. */
7172 type
= element_type
;
7174 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7179 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7184 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7187 /* Understand Dwarf2 support for vector types (like they occur on
7188 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7189 array type. This is not part of the Dwarf2/3 standard yet, but a
7190 custom vendor extension. The main difference between a regular
7191 array and the vector variant is that vectors are passed by value
7193 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7195 make_vector_type (type
);
7197 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7198 implementation may choose to implement triple vectors using this
7200 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7203 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
7204 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7206 complaint (&symfile_complaints
, _("\
7207 DW_AT_byte_size for array type smaller than the total size of elements"));
7210 name
= dwarf2_name (die
, cu
);
7212 TYPE_NAME (type
) = name
;
7214 /* Install the type in the die. */
7215 set_die_type (die
, type
, cu
);
7217 /* set_die_type should be already done. */
7218 set_descriptive_type (type
, die
, cu
);
7220 do_cleanups (back_to
);
7225 static enum dwarf_array_dim_ordering
7226 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7228 struct attribute
*attr
;
7230 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7232 if (attr
) return DW_SND (attr
);
7235 GNU F77 is a special case, as at 08/2004 array type info is the
7236 opposite order to the dwarf2 specification, but data is still
7237 laid out as per normal fortran.
7239 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7243 if (cu
->language
== language_fortran
7244 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7246 return DW_ORD_row_major
;
7249 switch (cu
->language_defn
->la_array_ordering
)
7251 case array_column_major
:
7252 return DW_ORD_col_major
;
7253 case array_row_major
:
7255 return DW_ORD_row_major
;
7259 /* Extract all information from a DW_TAG_set_type DIE and put it in
7260 the DIE's type field. */
7262 static struct type
*
7263 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7265 struct type
*domain_type
, *set_type
;
7266 struct attribute
*attr
;
7268 domain_type
= die_type (die
, cu
);
7270 /* The die_type call above may have already set the type for this DIE. */
7271 set_type
= get_die_type (die
, cu
);
7275 set_type
= create_set_type (NULL
, domain_type
);
7277 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7279 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7281 return set_die_type (die
, set_type
, cu
);
7284 /* First cut: install each common block member as a global variable. */
7287 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7289 struct die_info
*child_die
;
7290 struct attribute
*attr
;
7292 CORE_ADDR base
= (CORE_ADDR
) 0;
7294 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7297 /* Support the .debug_loc offsets */
7298 if (attr_form_is_block (attr
))
7300 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7302 else if (attr_form_is_section_offset (attr
))
7304 dwarf2_complex_location_expr_complaint ();
7308 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7309 "common block member");
7312 if (die
->child
!= NULL
)
7314 child_die
= die
->child
;
7315 while (child_die
&& child_die
->tag
)
7317 sym
= new_symbol (child_die
, NULL
, cu
);
7318 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7319 if (sym
!= NULL
&& attr
!= NULL
)
7321 CORE_ADDR byte_offset
= 0;
7323 if (attr_form_is_section_offset (attr
))
7324 dwarf2_complex_location_expr_complaint ();
7325 else if (attr_form_is_constant (attr
))
7326 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7327 else if (attr_form_is_block (attr
))
7328 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7330 dwarf2_complex_location_expr_complaint ();
7332 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7333 add_symbol_to_list (sym
, &global_symbols
);
7335 child_die
= sibling_die (child_die
);
7340 /* Create a type for a C++ namespace. */
7342 static struct type
*
7343 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7345 struct objfile
*objfile
= cu
->objfile
;
7346 const char *previous_prefix
, *name
;
7350 /* For extensions, reuse the type of the original namespace. */
7351 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7353 struct die_info
*ext_die
;
7354 struct dwarf2_cu
*ext_cu
= cu
;
7356 ext_die
= dwarf2_extension (die
, &ext_cu
);
7357 type
= read_type_die (ext_die
, ext_cu
);
7359 /* EXT_CU may not be the same as CU.
7360 Ensure TYPE is recorded in CU's type_hash table. */
7361 return set_die_type (die
, type
, cu
);
7364 name
= namespace_name (die
, &is_anonymous
, cu
);
7366 /* Now build the name of the current namespace. */
7368 previous_prefix
= determine_prefix (die
, cu
);
7369 if (previous_prefix
[0] != '\0')
7370 name
= typename_concat (&objfile
->objfile_obstack
,
7371 previous_prefix
, name
, 0, cu
);
7373 /* Create the type. */
7374 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7376 TYPE_NAME (type
) = (char *) name
;
7377 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7379 return set_die_type (die
, type
, cu
);
7382 /* Read a C++ namespace. */
7385 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7387 struct objfile
*objfile
= cu
->objfile
;
7391 /* Add a symbol associated to this if we haven't seen the namespace
7392 before. Also, add a using directive if it's an anonymous
7395 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7399 type
= read_type_die (die
, cu
);
7400 new_symbol (die
, type
, cu
);
7402 name
= namespace_name (die
, &is_anonymous
, cu
);
7405 const char *previous_prefix
= determine_prefix (die
, cu
);
7407 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7408 NULL
, &objfile
->objfile_obstack
);
7412 if (die
->child
!= NULL
)
7414 struct die_info
*child_die
= die
->child
;
7416 while (child_die
&& child_die
->tag
)
7418 process_die (child_die
, cu
);
7419 child_die
= sibling_die (child_die
);
7424 /* Read a Fortran module as type. This DIE can be only a declaration used for
7425 imported module. Still we need that type as local Fortran "use ... only"
7426 declaration imports depend on the created type in determine_prefix. */
7428 static struct type
*
7429 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7431 struct objfile
*objfile
= cu
->objfile
;
7435 module_name
= dwarf2_name (die
, cu
);
7437 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7439 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7441 /* determine_prefix uses TYPE_TAG_NAME. */
7442 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7444 return set_die_type (die
, type
, cu
);
7447 /* Read a Fortran module. */
7450 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7452 struct die_info
*child_die
= die
->child
;
7454 while (child_die
&& child_die
->tag
)
7456 process_die (child_die
, cu
);
7457 child_die
= sibling_die (child_die
);
7461 /* Return the name of the namespace represented by DIE. Set
7462 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7466 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7468 struct die_info
*current_die
;
7469 const char *name
= NULL
;
7471 /* Loop through the extensions until we find a name. */
7473 for (current_die
= die
;
7474 current_die
!= NULL
;
7475 current_die
= dwarf2_extension (die
, &cu
))
7477 name
= dwarf2_name (current_die
, cu
);
7482 /* Is it an anonymous namespace? */
7484 *is_anonymous
= (name
== NULL
);
7486 name
= "(anonymous namespace)";
7491 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7492 the user defined type vector. */
7494 static struct type
*
7495 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7497 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7498 struct comp_unit_head
*cu_header
= &cu
->header
;
7500 struct attribute
*attr_byte_size
;
7501 struct attribute
*attr_address_class
;
7502 int byte_size
, addr_class
;
7503 struct type
*target_type
;
7505 target_type
= die_type (die
, cu
);
7507 /* The die_type call above may have already set the type for this DIE. */
7508 type
= get_die_type (die
, cu
);
7512 type
= lookup_pointer_type (target_type
);
7514 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7516 byte_size
= DW_UNSND (attr_byte_size
);
7518 byte_size
= cu_header
->addr_size
;
7520 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7521 if (attr_address_class
)
7522 addr_class
= DW_UNSND (attr_address_class
);
7524 addr_class
= DW_ADDR_none
;
7526 /* If the pointer size or address class is different than the
7527 default, create a type variant marked as such and set the
7528 length accordingly. */
7529 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7531 if (gdbarch_address_class_type_flags_p (gdbarch
))
7535 type_flags
= gdbarch_address_class_type_flags
7536 (gdbarch
, byte_size
, addr_class
);
7537 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7539 type
= make_type_with_address_space (type
, type_flags
);
7541 else if (TYPE_LENGTH (type
) != byte_size
)
7543 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7547 /* Should we also complain about unhandled address classes? */
7551 TYPE_LENGTH (type
) = byte_size
;
7552 return set_die_type (die
, type
, cu
);
7555 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7556 the user defined type vector. */
7558 static struct type
*
7559 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7562 struct type
*to_type
;
7563 struct type
*domain
;
7565 to_type
= die_type (die
, cu
);
7566 domain
= die_containing_type (die
, cu
);
7568 /* The calls above may have already set the type for this DIE. */
7569 type
= get_die_type (die
, cu
);
7573 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7574 type
= lookup_methodptr_type (to_type
);
7576 type
= lookup_memberptr_type (to_type
, domain
);
7578 return set_die_type (die
, type
, cu
);
7581 /* Extract all information from a DW_TAG_reference_type DIE and add to
7582 the user defined type vector. */
7584 static struct type
*
7585 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7587 struct comp_unit_head
*cu_header
= &cu
->header
;
7588 struct type
*type
, *target_type
;
7589 struct attribute
*attr
;
7591 target_type
= die_type (die
, cu
);
7593 /* The die_type call above may have already set the type for this DIE. */
7594 type
= get_die_type (die
, cu
);
7598 type
= lookup_reference_type (target_type
);
7599 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7602 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7606 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7608 return set_die_type (die
, type
, cu
);
7611 static struct type
*
7612 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7614 struct type
*base_type
, *cv_type
;
7616 base_type
= die_type (die
, cu
);
7618 /* The die_type call above may have already set the type for this DIE. */
7619 cv_type
= get_die_type (die
, cu
);
7623 /* In case the const qualifier is applied to an array type, the element type
7624 is so qualified, not the array type (section 6.7.3 of C99). */
7625 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
7627 struct type
*el_type
, *inner_array
;
7629 base_type
= copy_type (base_type
);
7630 inner_array
= base_type
;
7632 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
7634 TYPE_TARGET_TYPE (inner_array
) =
7635 copy_type (TYPE_TARGET_TYPE (inner_array
));
7636 inner_array
= TYPE_TARGET_TYPE (inner_array
);
7639 el_type
= TYPE_TARGET_TYPE (inner_array
);
7640 TYPE_TARGET_TYPE (inner_array
) =
7641 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
7643 return set_die_type (die
, base_type
, cu
);
7646 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7647 return set_die_type (die
, cv_type
, cu
);
7650 static struct type
*
7651 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7653 struct type
*base_type
, *cv_type
;
7655 base_type
= die_type (die
, cu
);
7657 /* The die_type call above may have already set the type for this DIE. */
7658 cv_type
= get_die_type (die
, cu
);
7662 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7663 return set_die_type (die
, cv_type
, cu
);
7666 /* Extract all information from a DW_TAG_string_type DIE and add to
7667 the user defined type vector. It isn't really a user defined type,
7668 but it behaves like one, with other DIE's using an AT_user_def_type
7669 attribute to reference it. */
7671 static struct type
*
7672 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7674 struct objfile
*objfile
= cu
->objfile
;
7675 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7676 struct type
*type
, *range_type
, *index_type
, *char_type
;
7677 struct attribute
*attr
;
7678 unsigned int length
;
7680 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7683 length
= DW_UNSND (attr
);
7687 /* check for the DW_AT_byte_size attribute */
7688 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7691 length
= DW_UNSND (attr
);
7699 index_type
= objfile_type (objfile
)->builtin_int
;
7700 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7701 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7702 type
= create_string_type (NULL
, char_type
, range_type
);
7704 return set_die_type (die
, type
, cu
);
7707 /* Handle DIES due to C code like:
7711 int (*funcp)(int a, long l);
7715 ('funcp' generates a DW_TAG_subroutine_type DIE)
7718 static struct type
*
7719 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7721 struct type
*type
; /* Type that this function returns */
7722 struct type
*ftype
; /* Function that returns above type */
7723 struct attribute
*attr
;
7725 type
= die_type (die
, cu
);
7727 /* The die_type call above may have already set the type for this DIE. */
7728 ftype
= get_die_type (die
, cu
);
7732 ftype
= lookup_function_type (type
);
7734 /* All functions in C++, Pascal and Java have prototypes. */
7735 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7736 if ((attr
&& (DW_UNSND (attr
) != 0))
7737 || cu
->language
== language_cplus
7738 || cu
->language
== language_java
7739 || cu
->language
== language_pascal
)
7740 TYPE_PROTOTYPED (ftype
) = 1;
7741 else if (producer_is_realview (cu
->producer
))
7742 /* RealView does not emit DW_AT_prototyped. We can not
7743 distinguish prototyped and unprototyped functions; default to
7744 prototyped, since that is more common in modern code (and
7745 RealView warns about unprototyped functions). */
7746 TYPE_PROTOTYPED (ftype
) = 1;
7748 /* Store the calling convention in the type if it's available in
7749 the subroutine die. Otherwise set the calling convention to
7750 the default value DW_CC_normal. */
7751 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7752 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7754 /* We need to add the subroutine type to the die immediately so
7755 we don't infinitely recurse when dealing with parameters
7756 declared as the same subroutine type. */
7757 set_die_type (die
, ftype
, cu
);
7759 if (die
->child
!= NULL
)
7761 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7762 struct die_info
*child_die
;
7763 int nparams
, iparams
;
7765 /* Count the number of parameters.
7766 FIXME: GDB currently ignores vararg functions, but knows about
7767 vararg member functions. */
7769 child_die
= die
->child
;
7770 while (child_die
&& child_die
->tag
)
7772 if (child_die
->tag
== DW_TAG_formal_parameter
)
7774 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7775 TYPE_VARARGS (ftype
) = 1;
7776 child_die
= sibling_die (child_die
);
7779 /* Allocate storage for parameters and fill them in. */
7780 TYPE_NFIELDS (ftype
) = nparams
;
7781 TYPE_FIELDS (ftype
) = (struct field
*)
7782 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7784 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7785 even if we error out during the parameters reading below. */
7786 for (iparams
= 0; iparams
< nparams
; iparams
++)
7787 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7790 child_die
= die
->child
;
7791 while (child_die
&& child_die
->tag
)
7793 if (child_die
->tag
== DW_TAG_formal_parameter
)
7795 struct type
*arg_type
;
7797 /* DWARF version 2 has no clean way to discern C++
7798 static and non-static member functions. G++ helps
7799 GDB by marking the first parameter for non-static
7800 member functions (which is the this pointer) as
7801 artificial. We pass this information to
7802 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7804 DWARF version 3 added DW_AT_object_pointer, which GCC
7805 4.5 does not yet generate. */
7806 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7808 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7811 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7813 /* GCC/43521: In java, the formal parameter
7814 "this" is sometimes not marked with DW_AT_artificial. */
7815 if (cu
->language
== language_java
)
7817 const char *name
= dwarf2_name (child_die
, cu
);
7819 if (name
&& !strcmp (name
, "this"))
7820 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7823 arg_type
= die_type (child_die
, cu
);
7825 /* RealView does not mark THIS as const, which the testsuite
7826 expects. GCC marks THIS as const in method definitions,
7827 but not in the class specifications (GCC PR 43053). */
7828 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7829 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7832 struct dwarf2_cu
*arg_cu
= cu
;
7833 const char *name
= dwarf2_name (child_die
, cu
);
7835 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7838 /* If the compiler emits this, use it. */
7839 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7842 else if (name
&& strcmp (name
, "this") == 0)
7843 /* Function definitions will have the argument names. */
7845 else if (name
== NULL
&& iparams
== 0)
7846 /* Declarations may not have the names, so like
7847 elsewhere in GDB, assume an artificial first
7848 argument is "this". */
7852 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7856 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7859 child_die
= sibling_die (child_die
);
7866 static struct type
*
7867 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7869 struct objfile
*objfile
= cu
->objfile
;
7870 const char *name
= NULL
;
7871 struct type
*this_type
;
7873 name
= dwarf2_full_name (NULL
, die
, cu
);
7874 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7875 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7876 TYPE_NAME (this_type
) = (char *) name
;
7877 set_die_type (die
, this_type
, cu
);
7878 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7882 /* Find a representation of a given base type and install
7883 it in the TYPE field of the die. */
7885 static struct type
*
7886 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7888 struct objfile
*objfile
= cu
->objfile
;
7890 struct attribute
*attr
;
7891 int encoding
= 0, size
= 0;
7893 enum type_code code
= TYPE_CODE_INT
;
7895 struct type
*target_type
= NULL
;
7897 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7900 encoding
= DW_UNSND (attr
);
7902 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7905 size
= DW_UNSND (attr
);
7907 name
= dwarf2_name (die
, cu
);
7910 complaint (&symfile_complaints
,
7911 _("DW_AT_name missing from DW_TAG_base_type"));
7916 case DW_ATE_address
:
7917 /* Turn DW_ATE_address into a void * pointer. */
7918 code
= TYPE_CODE_PTR
;
7919 type_flags
|= TYPE_FLAG_UNSIGNED
;
7920 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7922 case DW_ATE_boolean
:
7923 code
= TYPE_CODE_BOOL
;
7924 type_flags
|= TYPE_FLAG_UNSIGNED
;
7926 case DW_ATE_complex_float
:
7927 code
= TYPE_CODE_COMPLEX
;
7928 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7930 case DW_ATE_decimal_float
:
7931 code
= TYPE_CODE_DECFLOAT
;
7934 code
= TYPE_CODE_FLT
;
7938 case DW_ATE_unsigned
:
7939 type_flags
|= TYPE_FLAG_UNSIGNED
;
7941 case DW_ATE_signed_char
:
7942 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7943 || cu
->language
== language_pascal
)
7944 code
= TYPE_CODE_CHAR
;
7946 case DW_ATE_unsigned_char
:
7947 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7948 || cu
->language
== language_pascal
)
7949 code
= TYPE_CODE_CHAR
;
7950 type_flags
|= TYPE_FLAG_UNSIGNED
;
7953 /* We just treat this as an integer and then recognize the
7954 type by name elsewhere. */
7958 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7959 dwarf_type_encoding_name (encoding
));
7963 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7964 TYPE_NAME (type
) = name
;
7965 TYPE_TARGET_TYPE (type
) = target_type
;
7967 if (name
&& strcmp (name
, "char") == 0)
7968 TYPE_NOSIGN (type
) = 1;
7970 return set_die_type (die
, type
, cu
);
7973 /* Read the given DW_AT_subrange DIE. */
7975 static struct type
*
7976 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7978 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7979 struct type
*base_type
;
7980 struct type
*range_type
;
7981 struct attribute
*attr
;
7985 LONGEST negative_mask
;
7987 base_type
= die_type (die
, cu
);
7988 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7989 check_typedef (base_type
);
7991 /* The die_type call above may have already set the type for this DIE. */
7992 range_type
= get_die_type (die
, cu
);
7996 if (cu
->language
== language_fortran
)
7998 /* FORTRAN implies a lower bound of 1, if not given. */
8002 /* FIXME: For variable sized arrays either of these could be
8003 a variable rather than a constant value. We'll allow it,
8004 but we don't know how to handle it. */
8005 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8007 low
= dwarf2_get_attr_constant_value (attr
, 0);
8009 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8012 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8014 /* GCC encodes arrays with unspecified or dynamic length
8015 with a DW_FORM_block1 attribute or a reference attribute.
8016 FIXME: GDB does not yet know how to handle dynamic
8017 arrays properly, treat them as arrays with unspecified
8020 FIXME: jimb/2003-09-22: GDB does not really know
8021 how to handle arrays of unspecified length
8022 either; we just represent them as zero-length
8023 arrays. Choose an appropriate upper bound given
8024 the lower bound we've computed above. */
8028 high
= dwarf2_get_attr_constant_value (attr
, 1);
8032 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8035 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8036 high
= low
+ count
- 1;
8040 /* Dwarf-2 specifications explicitly allows to create subrange types
8041 without specifying a base type.
8042 In that case, the base type must be set to the type of
8043 the lower bound, upper bound or count, in that order, if any of these
8044 three attributes references an object that has a type.
8045 If no base type is found, the Dwarf-2 specifications say that
8046 a signed integer type of size equal to the size of an address should
8048 For the following C code: `extern char gdb_int [];'
8049 GCC produces an empty range DIE.
8050 FIXME: muller/2010-05-28: Possible references to object for low bound,
8051 high bound or count are not yet handled by this code.
8053 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8055 struct objfile
*objfile
= cu
->objfile
;
8056 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8057 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8058 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8060 /* Test "int", "long int", and "long long int" objfile types,
8061 and select the first one having a size above or equal to the
8062 architecture address size. */
8063 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8064 base_type
= int_type
;
8067 int_type
= objfile_type (objfile
)->builtin_long
;
8068 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8069 base_type
= int_type
;
8072 int_type
= objfile_type (objfile
)->builtin_long_long
;
8073 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8074 base_type
= int_type
;
8080 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8081 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8082 low
|= negative_mask
;
8083 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8084 high
|= negative_mask
;
8086 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8088 /* Mark arrays with dynamic length at least as an array of unspecified
8089 length. GDB could check the boundary but before it gets implemented at
8090 least allow accessing the array elements. */
8091 if (attr
&& attr
->form
== DW_FORM_block1
)
8092 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8094 name
= dwarf2_name (die
, cu
);
8096 TYPE_NAME (range_type
) = name
;
8098 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8100 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8102 set_die_type (die
, range_type
, cu
);
8104 /* set_die_type should be already done. */
8105 set_descriptive_type (range_type
, die
, cu
);
8110 static struct type
*
8111 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8115 /* For now, we only support the C meaning of an unspecified type: void. */
8117 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8118 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8120 return set_die_type (die
, type
, cu
);
8123 /* Trivial hash function for die_info: the hash value of a DIE
8124 is its offset in .debug_info for this objfile. */
8127 die_hash (const void *item
)
8129 const struct die_info
*die
= item
;
8134 /* Trivial comparison function for die_info structures: two DIEs
8135 are equal if they have the same offset. */
8138 die_eq (const void *item_lhs
, const void *item_rhs
)
8140 const struct die_info
*die_lhs
= item_lhs
;
8141 const struct die_info
*die_rhs
= item_rhs
;
8143 return die_lhs
->offset
== die_rhs
->offset
;
8146 /* Read a whole compilation unit into a linked list of dies. */
8148 static struct die_info
*
8149 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8151 struct die_reader_specs reader_specs
;
8152 int read_abbrevs
= 0;
8153 struct cleanup
*back_to
= NULL
;
8154 struct die_info
*die
;
8156 if (cu
->dwarf2_abbrevs
== NULL
)
8158 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8159 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8163 gdb_assert (cu
->die_hash
== NULL
);
8165 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8169 &cu
->comp_unit_obstack
,
8170 hashtab_obstack_allocate
,
8171 dummy_obstack_deallocate
);
8173 init_cu_die_reader (&reader_specs
, cu
);
8175 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8178 do_cleanups (back_to
);
8183 /* Main entry point for reading a DIE and all children.
8184 Read the DIE and dump it if requested. */
8186 static struct die_info
*
8187 read_die_and_children (const struct die_reader_specs
*reader
,
8189 gdb_byte
**new_info_ptr
,
8190 struct die_info
*parent
)
8192 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8193 new_info_ptr
, parent
);
8195 if (dwarf2_die_debug
)
8197 fprintf_unfiltered (gdb_stdlog
,
8198 "\nRead die from %s of %s:\n",
8199 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8201 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8203 : "unknown section",
8204 reader
->abfd
->filename
);
8205 dump_die (result
, dwarf2_die_debug
);
8211 /* Read a single die and all its descendents. Set the die's sibling
8212 field to NULL; set other fields in the die correctly, and set all
8213 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8214 location of the info_ptr after reading all of those dies. PARENT
8215 is the parent of the die in question. */
8217 static struct die_info
*
8218 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8220 gdb_byte
**new_info_ptr
,
8221 struct die_info
*parent
)
8223 struct die_info
*die
;
8227 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8230 *new_info_ptr
= cur_ptr
;
8233 store_in_ref_table (die
, reader
->cu
);
8236 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8240 *new_info_ptr
= cur_ptr
;
8243 die
->sibling
= NULL
;
8244 die
->parent
= parent
;
8248 /* Read a die, all of its descendents, and all of its siblings; set
8249 all of the fields of all of the dies correctly. Arguments are as
8250 in read_die_and_children. */
8252 static struct die_info
*
8253 read_die_and_siblings (const struct die_reader_specs
*reader
,
8255 gdb_byte
**new_info_ptr
,
8256 struct die_info
*parent
)
8258 struct die_info
*first_die
, *last_sibling
;
8262 first_die
= last_sibling
= NULL
;
8266 struct die_info
*die
8267 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8271 *new_info_ptr
= cur_ptr
;
8278 last_sibling
->sibling
= die
;
8284 /* Read the die from the .debug_info section buffer. Set DIEP to
8285 point to a newly allocated die with its information, except for its
8286 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8287 whether the die has children or not. */
8290 read_full_die (const struct die_reader_specs
*reader
,
8291 struct die_info
**diep
, gdb_byte
*info_ptr
,
8294 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8295 struct abbrev_info
*abbrev
;
8296 struct die_info
*die
;
8297 struct dwarf2_cu
*cu
= reader
->cu
;
8298 bfd
*abfd
= reader
->abfd
;
8300 offset
= info_ptr
- reader
->buffer
;
8301 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8302 info_ptr
+= bytes_read
;
8310 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8312 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8314 bfd_get_filename (abfd
));
8316 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8317 die
->offset
= offset
;
8318 die
->tag
= abbrev
->tag
;
8319 die
->abbrev
= abbrev_number
;
8321 die
->num_attrs
= abbrev
->num_attrs
;
8323 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8324 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8325 abfd
, info_ptr
, cu
);
8328 *has_children
= abbrev
->has_children
;
8332 /* In DWARF version 2, the description of the debugging information is
8333 stored in a separate .debug_abbrev section. Before we read any
8334 dies from a section we read in all abbreviations and install them
8335 in a hash table. This function also sets flags in CU describing
8336 the data found in the abbrev table. */
8339 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8341 struct comp_unit_head
*cu_header
= &cu
->header
;
8342 gdb_byte
*abbrev_ptr
;
8343 struct abbrev_info
*cur_abbrev
;
8344 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8345 unsigned int abbrev_form
, hash_number
;
8346 struct attr_abbrev
*cur_attrs
;
8347 unsigned int allocated_attrs
;
8349 /* Initialize dwarf2 abbrevs */
8350 obstack_init (&cu
->abbrev_obstack
);
8351 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8353 * sizeof (struct abbrev_info
*)));
8354 memset (cu
->dwarf2_abbrevs
, 0,
8355 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8357 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8358 &dwarf2_per_objfile
->abbrev
);
8359 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8360 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8361 abbrev_ptr
+= bytes_read
;
8363 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8364 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8366 /* loop until we reach an abbrev number of 0 */
8367 while (abbrev_number
)
8369 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8371 /* read in abbrev header */
8372 cur_abbrev
->number
= abbrev_number
;
8373 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8374 abbrev_ptr
+= bytes_read
;
8375 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8378 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8379 cu
->has_namespace_info
= 1;
8381 /* now read in declarations */
8382 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8383 abbrev_ptr
+= bytes_read
;
8384 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8385 abbrev_ptr
+= bytes_read
;
8388 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8390 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8392 = xrealloc (cur_attrs
, (allocated_attrs
8393 * sizeof (struct attr_abbrev
)));
8396 /* Record whether this compilation unit might have
8397 inter-compilation-unit references. If we don't know what form
8398 this attribute will have, then it might potentially be a
8399 DW_FORM_ref_addr, so we conservatively expect inter-CU
8402 if (abbrev_form
== DW_FORM_ref_addr
8403 || abbrev_form
== DW_FORM_indirect
)
8404 cu
->has_form_ref_addr
= 1;
8406 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8407 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8408 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8409 abbrev_ptr
+= bytes_read
;
8410 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8411 abbrev_ptr
+= bytes_read
;
8414 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8415 (cur_abbrev
->num_attrs
8416 * sizeof (struct attr_abbrev
)));
8417 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8418 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8420 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8421 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8422 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8424 /* Get next abbreviation.
8425 Under Irix6 the abbreviations for a compilation unit are not
8426 always properly terminated with an abbrev number of 0.
8427 Exit loop if we encounter an abbreviation which we have
8428 already read (which means we are about to read the abbreviations
8429 for the next compile unit) or if the end of the abbreviation
8430 table is reached. */
8431 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8432 >= dwarf2_per_objfile
->abbrev
.size
)
8434 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8435 abbrev_ptr
+= bytes_read
;
8436 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8443 /* Release the memory used by the abbrev table for a compilation unit. */
8446 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8448 struct dwarf2_cu
*cu
= ptr_to_cu
;
8450 obstack_free (&cu
->abbrev_obstack
, NULL
);
8451 cu
->dwarf2_abbrevs
= NULL
;
8454 /* Lookup an abbrev_info structure in the abbrev hash table. */
8456 static struct abbrev_info
*
8457 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8459 unsigned int hash_number
;
8460 struct abbrev_info
*abbrev
;
8462 hash_number
= number
% ABBREV_HASH_SIZE
;
8463 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8467 if (abbrev
->number
== number
)
8470 abbrev
= abbrev
->next
;
8475 /* Returns nonzero if TAG represents a type that we might generate a partial
8479 is_type_tag_for_partial (int tag
)
8484 /* Some types that would be reasonable to generate partial symbols for,
8485 that we don't at present. */
8486 case DW_TAG_array_type
:
8487 case DW_TAG_file_type
:
8488 case DW_TAG_ptr_to_member_type
:
8489 case DW_TAG_set_type
:
8490 case DW_TAG_string_type
:
8491 case DW_TAG_subroutine_type
:
8493 case DW_TAG_base_type
:
8494 case DW_TAG_class_type
:
8495 case DW_TAG_interface_type
:
8496 case DW_TAG_enumeration_type
:
8497 case DW_TAG_structure_type
:
8498 case DW_TAG_subrange_type
:
8499 case DW_TAG_typedef
:
8500 case DW_TAG_union_type
:
8507 /* Load all DIEs that are interesting for partial symbols into memory. */
8509 static struct partial_die_info
*
8510 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8511 int building_psymtab
, struct dwarf2_cu
*cu
)
8513 struct partial_die_info
*part_die
;
8514 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8515 struct abbrev_info
*abbrev
;
8516 unsigned int bytes_read
;
8517 unsigned int load_all
= 0;
8519 int nesting_level
= 1;
8524 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8528 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8532 &cu
->comp_unit_obstack
,
8533 hashtab_obstack_allocate
,
8534 dummy_obstack_deallocate
);
8536 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8537 sizeof (struct partial_die_info
));
8541 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8543 /* A NULL abbrev means the end of a series of children. */
8546 if (--nesting_level
== 0)
8548 /* PART_DIE was probably the last thing allocated on the
8549 comp_unit_obstack, so we could call obstack_free
8550 here. We don't do that because the waste is small,
8551 and will be cleaned up when we're done with this
8552 compilation unit. This way, we're also more robust
8553 against other users of the comp_unit_obstack. */
8556 info_ptr
+= bytes_read
;
8557 last_die
= parent_die
;
8558 parent_die
= parent_die
->die_parent
;
8562 /* Check for template arguments. We never save these; if
8563 they're seen, we just mark the parent, and go on our way. */
8564 if (parent_die
!= NULL
8565 && cu
->language
== language_cplus
8566 && (abbrev
->tag
== DW_TAG_template_type_param
8567 || abbrev
->tag
== DW_TAG_template_value_param
))
8569 parent_die
->has_template_arguments
= 1;
8573 /* We don't need a partial DIE for the template argument. */
8574 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8580 /* We only recurse into subprograms looking for template arguments.
8581 Skip their other children. */
8583 && cu
->language
== language_cplus
8584 && parent_die
!= NULL
8585 && parent_die
->tag
== DW_TAG_subprogram
)
8587 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8591 /* Check whether this DIE is interesting enough to save. Normally
8592 we would not be interested in members here, but there may be
8593 later variables referencing them via DW_AT_specification (for
8596 && !is_type_tag_for_partial (abbrev
->tag
)
8597 && abbrev
->tag
!= DW_TAG_constant
8598 && abbrev
->tag
!= DW_TAG_enumerator
8599 && abbrev
->tag
!= DW_TAG_subprogram
8600 && abbrev
->tag
!= DW_TAG_lexical_block
8601 && abbrev
->tag
!= DW_TAG_variable
8602 && abbrev
->tag
!= DW_TAG_namespace
8603 && abbrev
->tag
!= DW_TAG_module
8604 && abbrev
->tag
!= DW_TAG_member
)
8606 /* Otherwise we skip to the next sibling, if any. */
8607 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8611 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8612 buffer
, info_ptr
, cu
);
8614 /* This two-pass algorithm for processing partial symbols has a
8615 high cost in cache pressure. Thus, handle some simple cases
8616 here which cover the majority of C partial symbols. DIEs
8617 which neither have specification tags in them, nor could have
8618 specification tags elsewhere pointing at them, can simply be
8619 processed and discarded.
8621 This segment is also optional; scan_partial_symbols and
8622 add_partial_symbol will handle these DIEs if we chain
8623 them in normally. When compilers which do not emit large
8624 quantities of duplicate debug information are more common,
8625 this code can probably be removed. */
8627 /* Any complete simple types at the top level (pretty much all
8628 of them, for a language without namespaces), can be processed
8630 if (parent_die
== NULL
8631 && part_die
->has_specification
== 0
8632 && part_die
->is_declaration
== 0
8633 && (part_die
->tag
== DW_TAG_typedef
8634 || part_die
->tag
== DW_TAG_base_type
8635 || part_die
->tag
== DW_TAG_subrange_type
))
8637 if (building_psymtab
&& part_die
->name
!= NULL
)
8638 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8639 VAR_DOMAIN
, LOC_TYPEDEF
,
8640 &cu
->objfile
->static_psymbols
,
8641 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8642 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8646 /* If we're at the second level, and we're an enumerator, and
8647 our parent has no specification (meaning possibly lives in a
8648 namespace elsewhere), then we can add the partial symbol now
8649 instead of queueing it. */
8650 if (part_die
->tag
== DW_TAG_enumerator
8651 && parent_die
!= NULL
8652 && parent_die
->die_parent
== NULL
8653 && parent_die
->tag
== DW_TAG_enumeration_type
8654 && parent_die
->has_specification
== 0)
8656 if (part_die
->name
== NULL
)
8657 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8658 else if (building_psymtab
)
8659 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8660 VAR_DOMAIN
, LOC_CONST
,
8661 (cu
->language
== language_cplus
8662 || cu
->language
== language_java
)
8663 ? &cu
->objfile
->global_psymbols
8664 : &cu
->objfile
->static_psymbols
,
8665 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8667 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8671 /* We'll save this DIE so link it in. */
8672 part_die
->die_parent
= parent_die
;
8673 part_die
->die_sibling
= NULL
;
8674 part_die
->die_child
= NULL
;
8676 if (last_die
&& last_die
== parent_die
)
8677 last_die
->die_child
= part_die
;
8679 last_die
->die_sibling
= part_die
;
8681 last_die
= part_die
;
8683 if (first_die
== NULL
)
8684 first_die
= part_die
;
8686 /* Maybe add the DIE to the hash table. Not all DIEs that we
8687 find interesting need to be in the hash table, because we
8688 also have the parent/sibling/child chains; only those that we
8689 might refer to by offset later during partial symbol reading.
8691 For now this means things that might have be the target of a
8692 DW_AT_specification, DW_AT_abstract_origin, or
8693 DW_AT_extension. DW_AT_extension will refer only to
8694 namespaces; DW_AT_abstract_origin refers to functions (and
8695 many things under the function DIE, but we do not recurse
8696 into function DIEs during partial symbol reading) and
8697 possibly variables as well; DW_AT_specification refers to
8698 declarations. Declarations ought to have the DW_AT_declaration
8699 flag. It happens that GCC forgets to put it in sometimes, but
8700 only for functions, not for types.
8702 Adding more things than necessary to the hash table is harmless
8703 except for the performance cost. Adding too few will result in
8704 wasted time in find_partial_die, when we reread the compilation
8705 unit with load_all_dies set. */
8708 || abbrev
->tag
== DW_TAG_constant
8709 || abbrev
->tag
== DW_TAG_subprogram
8710 || abbrev
->tag
== DW_TAG_variable
8711 || abbrev
->tag
== DW_TAG_namespace
8712 || part_die
->is_declaration
)
8716 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8717 part_die
->offset
, INSERT
);
8721 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8722 sizeof (struct partial_die_info
));
8724 /* For some DIEs we want to follow their children (if any). For C
8725 we have no reason to follow the children of structures; for other
8726 languages we have to, so that we can get at method physnames
8727 to infer fully qualified class names, for DW_AT_specification,
8728 and for C++ template arguments. For C++, we also look one level
8729 inside functions to find template arguments (if the name of the
8730 function does not already contain the template arguments).
8732 For Ada, we need to scan the children of subprograms and lexical
8733 blocks as well because Ada allows the definition of nested
8734 entities that could be interesting for the debugger, such as
8735 nested subprograms for instance. */
8736 if (last_die
->has_children
8738 || last_die
->tag
== DW_TAG_namespace
8739 || last_die
->tag
== DW_TAG_module
8740 || last_die
->tag
== DW_TAG_enumeration_type
8741 || (cu
->language
== language_cplus
8742 && last_die
->tag
== DW_TAG_subprogram
8743 && (last_die
->name
== NULL
8744 || strchr (last_die
->name
, '<') == NULL
))
8745 || (cu
->language
!= language_c
8746 && (last_die
->tag
== DW_TAG_class_type
8747 || last_die
->tag
== DW_TAG_interface_type
8748 || last_die
->tag
== DW_TAG_structure_type
8749 || last_die
->tag
== DW_TAG_union_type
))
8750 || (cu
->language
== language_ada
8751 && (last_die
->tag
== DW_TAG_subprogram
8752 || last_die
->tag
== DW_TAG_lexical_block
))))
8755 parent_die
= last_die
;
8759 /* Otherwise we skip to the next sibling, if any. */
8760 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8762 /* Back to the top, do it again. */
8766 /* Read a minimal amount of information into the minimal die structure. */
8769 read_partial_die (struct partial_die_info
*part_die
,
8770 struct abbrev_info
*abbrev
,
8771 unsigned int abbrev_len
, bfd
*abfd
,
8772 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8773 struct dwarf2_cu
*cu
)
8776 struct attribute attr
;
8777 int has_low_pc_attr
= 0;
8778 int has_high_pc_attr
= 0;
8780 memset (part_die
, 0, sizeof (struct partial_die_info
));
8782 part_die
->offset
= info_ptr
- buffer
;
8784 info_ptr
+= abbrev_len
;
8789 part_die
->tag
= abbrev
->tag
;
8790 part_die
->has_children
= abbrev
->has_children
;
8792 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8794 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8796 /* Store the data if it is of an attribute we want to keep in a
8797 partial symbol table. */
8801 switch (part_die
->tag
)
8803 case DW_TAG_compile_unit
:
8804 case DW_TAG_type_unit
:
8805 /* Compilation units have a DW_AT_name that is a filename, not
8806 a source language identifier. */
8807 case DW_TAG_enumeration_type
:
8808 case DW_TAG_enumerator
:
8809 /* These tags always have simple identifiers already; no need
8810 to canonicalize them. */
8811 part_die
->name
= DW_STRING (&attr
);
8815 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8816 &cu
->objfile
->objfile_obstack
);
8820 case DW_AT_linkage_name
:
8821 case DW_AT_MIPS_linkage_name
:
8822 /* Note that both forms of linkage name might appear. We
8823 assume they will be the same, and we only store the last
8825 if (cu
->language
== language_ada
)
8826 part_die
->name
= DW_STRING (&attr
);
8827 part_die
->linkage_name
= DW_STRING (&attr
);
8830 has_low_pc_attr
= 1;
8831 part_die
->lowpc
= DW_ADDR (&attr
);
8834 has_high_pc_attr
= 1;
8835 part_die
->highpc
= DW_ADDR (&attr
);
8837 case DW_AT_location
:
8838 /* Support the .debug_loc offsets */
8839 if (attr_form_is_block (&attr
))
8841 part_die
->locdesc
= DW_BLOCK (&attr
);
8843 else if (attr_form_is_section_offset (&attr
))
8845 dwarf2_complex_location_expr_complaint ();
8849 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8850 "partial symbol information");
8853 case DW_AT_external
:
8854 part_die
->is_external
= DW_UNSND (&attr
);
8856 case DW_AT_declaration
:
8857 part_die
->is_declaration
= DW_UNSND (&attr
);
8860 part_die
->has_type
= 1;
8862 case DW_AT_abstract_origin
:
8863 case DW_AT_specification
:
8864 case DW_AT_extension
:
8865 part_die
->has_specification
= 1;
8866 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8869 /* Ignore absolute siblings, they might point outside of
8870 the current compile unit. */
8871 if (attr
.form
== DW_FORM_ref_addr
)
8872 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8874 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8876 case DW_AT_byte_size
:
8877 part_die
->has_byte_size
= 1;
8879 case DW_AT_calling_convention
:
8880 /* DWARF doesn't provide a way to identify a program's source-level
8881 entry point. DW_AT_calling_convention attributes are only meant
8882 to describe functions' calling conventions.
8884 However, because it's a necessary piece of information in
8885 Fortran, and because DW_CC_program is the only piece of debugging
8886 information whose definition refers to a 'main program' at all,
8887 several compilers have begun marking Fortran main programs with
8888 DW_CC_program --- even when those functions use the standard
8889 calling conventions.
8891 So until DWARF specifies a way to provide this information and
8892 compilers pick up the new representation, we'll support this
8894 if (DW_UNSND (&attr
) == DW_CC_program
8895 && cu
->language
== language_fortran
)
8897 set_main_name (part_die
->name
);
8899 /* As this DIE has a static linkage the name would be difficult
8900 to look up later. */
8901 language_of_main
= language_fortran
;
8909 /* When using the GNU linker, .gnu.linkonce. sections are used to
8910 eliminate duplicate copies of functions and vtables and such.
8911 The linker will arbitrarily choose one and discard the others.
8912 The AT_*_pc values for such functions refer to local labels in
8913 these sections. If the section from that file was discarded, the
8914 labels are not in the output, so the relocs get a value of 0.
8915 If this is a discarded function, mark the pc bounds as invalid,
8916 so that GDB will ignore it. */
8917 if (has_low_pc_attr
&& has_high_pc_attr
8918 && part_die
->lowpc
< part_die
->highpc
8919 && (part_die
->lowpc
!= 0
8920 || dwarf2_per_objfile
->has_section_at_zero
))
8921 part_die
->has_pc_info
= 1;
8926 /* Find a cached partial DIE at OFFSET in CU. */
8928 static struct partial_die_info
*
8929 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8931 struct partial_die_info
*lookup_die
= NULL
;
8932 struct partial_die_info part_die
;
8934 part_die
.offset
= offset
;
8935 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8940 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8941 except in the case of .debug_types DIEs which do not reference
8942 outside their CU (they do however referencing other types via
8945 static struct partial_die_info
*
8946 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8948 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8949 struct partial_die_info
*pd
= NULL
;
8951 if (cu
->per_cu
->from_debug_types
)
8953 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8959 if (offset_in_cu_p (&cu
->header
, offset
))
8961 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8966 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8968 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8969 load_partial_comp_unit (per_cu
, cu
->objfile
);
8971 per_cu
->cu
->last_used
= 0;
8972 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8974 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8976 struct cleanup
*back_to
;
8977 struct partial_die_info comp_unit_die
;
8978 struct abbrev_info
*abbrev
;
8979 unsigned int bytes_read
;
8982 per_cu
->load_all_dies
= 1;
8984 /* Re-read the DIEs. */
8985 back_to
= make_cleanup (null_cleanup
, 0);
8986 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8988 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8989 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8991 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8992 + per_cu
->cu
->header
.offset
8993 + per_cu
->cu
->header
.first_die_offset
);
8994 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8995 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8996 per_cu
->cu
->objfile
->obfd
,
8997 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8999 if (comp_unit_die
.has_children
)
9000 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
9001 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9003 do_cleanups (back_to
);
9005 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9011 internal_error (__FILE__
, __LINE__
,
9012 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
9013 offset
, bfd_get_filename (cu
->objfile
->obfd
));
9017 /* See if we can figure out if the class lives in a namespace. We do
9018 this by looking for a member function; its demangled name will
9019 contain namespace info, if there is any. */
9022 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
9023 struct dwarf2_cu
*cu
)
9025 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9026 what template types look like, because the demangler
9027 frequently doesn't give the same name as the debug info. We
9028 could fix this by only using the demangled name to get the
9029 prefix (but see comment in read_structure_type). */
9031 struct partial_die_info
*real_pdi
;
9032 struct partial_die_info
*child_pdi
;
9034 /* If this DIE (this DIE's specification, if any) has a parent, then
9035 we should not do this. We'll prepend the parent's fully qualified
9036 name when we create the partial symbol. */
9038 real_pdi
= struct_pdi
;
9039 while (real_pdi
->has_specification
)
9040 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
9042 if (real_pdi
->die_parent
!= NULL
)
9045 for (child_pdi
= struct_pdi
->die_child
;
9047 child_pdi
= child_pdi
->die_sibling
)
9049 if (child_pdi
->tag
== DW_TAG_subprogram
9050 && child_pdi
->linkage_name
!= NULL
)
9052 char *actual_class_name
9053 = language_class_name_from_physname (cu
->language_defn
,
9054 child_pdi
->linkage_name
);
9055 if (actual_class_name
!= NULL
)
9058 = obsavestring (actual_class_name
,
9059 strlen (actual_class_name
),
9060 &cu
->objfile
->objfile_obstack
);
9061 xfree (actual_class_name
);
9068 /* Adjust PART_DIE before generating a symbol for it. This function
9069 may set the is_external flag or change the DIE's name. */
9072 fixup_partial_die (struct partial_die_info
*part_die
,
9073 struct dwarf2_cu
*cu
)
9075 /* Once we've fixed up a die, there's no point in doing so again.
9076 This also avoids a memory leak if we were to call
9077 guess_partial_die_structure_name multiple times. */
9078 if (part_die
->fixup_called
)
9081 /* If we found a reference attribute and the DIE has no name, try
9082 to find a name in the referred to DIE. */
9084 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9086 struct partial_die_info
*spec_die
;
9088 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9090 fixup_partial_die (spec_die
, cu
);
9094 part_die
->name
= spec_die
->name
;
9096 /* Copy DW_AT_external attribute if it is set. */
9097 if (spec_die
->is_external
)
9098 part_die
->is_external
= spec_die
->is_external
;
9102 /* Set default names for some unnamed DIEs. */
9104 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9105 part_die
->name
= "(anonymous namespace)";
9107 /* If there is no parent die to provide a namespace, and there are
9108 children, see if we can determine the namespace from their linkage
9110 NOTE: We need to do this even if cu->has_namespace_info != 0.
9111 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9112 if (cu
->language
== language_cplus
9113 && dwarf2_per_objfile
->types
.asection
!= NULL
9114 && part_die
->die_parent
== NULL
9115 && part_die
->has_children
9116 && (part_die
->tag
== DW_TAG_class_type
9117 || part_die
->tag
== DW_TAG_structure_type
9118 || part_die
->tag
== DW_TAG_union_type
))
9119 guess_partial_die_structure_name (part_die
, cu
);
9121 part_die
->fixup_called
= 1;
9124 /* Read an attribute value described by an attribute form. */
9127 read_attribute_value (struct attribute
*attr
, unsigned form
,
9128 bfd
*abfd
, gdb_byte
*info_ptr
,
9129 struct dwarf2_cu
*cu
)
9131 struct comp_unit_head
*cu_header
= &cu
->header
;
9132 unsigned int bytes_read
;
9133 struct dwarf_block
*blk
;
9138 case DW_FORM_ref_addr
:
9139 if (cu
->header
.version
== 2)
9140 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9142 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9143 info_ptr
+= bytes_read
;
9146 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9147 info_ptr
+= bytes_read
;
9149 case DW_FORM_block2
:
9150 blk
= dwarf_alloc_block (cu
);
9151 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9153 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9154 info_ptr
+= blk
->size
;
9155 DW_BLOCK (attr
) = blk
;
9157 case DW_FORM_block4
:
9158 blk
= dwarf_alloc_block (cu
);
9159 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9161 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9162 info_ptr
+= blk
->size
;
9163 DW_BLOCK (attr
) = blk
;
9166 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9170 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9174 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9177 case DW_FORM_sec_offset
:
9178 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9179 info_ptr
+= bytes_read
;
9181 case DW_FORM_string
:
9182 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9183 DW_STRING_IS_CANONICAL (attr
) = 0;
9184 info_ptr
+= bytes_read
;
9187 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9189 DW_STRING_IS_CANONICAL (attr
) = 0;
9190 info_ptr
+= bytes_read
;
9192 case DW_FORM_exprloc
:
9194 blk
= dwarf_alloc_block (cu
);
9195 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9196 info_ptr
+= bytes_read
;
9197 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9198 info_ptr
+= blk
->size
;
9199 DW_BLOCK (attr
) = blk
;
9201 case DW_FORM_block1
:
9202 blk
= dwarf_alloc_block (cu
);
9203 blk
->size
= read_1_byte (abfd
, info_ptr
);
9205 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9206 info_ptr
+= blk
->size
;
9207 DW_BLOCK (attr
) = blk
;
9210 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9214 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9217 case DW_FORM_flag_present
:
9218 DW_UNSND (attr
) = 1;
9221 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9222 info_ptr
+= bytes_read
;
9225 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9226 info_ptr
+= bytes_read
;
9229 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9233 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9237 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9241 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9245 /* Convert the signature to something we can record in DW_UNSND
9247 NOTE: This is NULL if the type wasn't found. */
9248 DW_SIGNATURED_TYPE (attr
) =
9249 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9252 case DW_FORM_ref_udata
:
9253 DW_ADDR (attr
) = (cu
->header
.offset
9254 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9255 info_ptr
+= bytes_read
;
9257 case DW_FORM_indirect
:
9258 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9259 info_ptr
+= bytes_read
;
9260 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9263 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9264 dwarf_form_name (form
),
9265 bfd_get_filename (abfd
));
9268 /* We have seen instances where the compiler tried to emit a byte
9269 size attribute of -1 which ended up being encoded as an unsigned
9270 0xffffffff. Although 0xffffffff is technically a valid size value,
9271 an object of this size seems pretty unlikely so we can relatively
9272 safely treat these cases as if the size attribute was invalid and
9273 treat them as zero by default. */
9274 if (attr
->name
== DW_AT_byte_size
9275 && form
== DW_FORM_data4
9276 && DW_UNSND (attr
) >= 0xffffffff)
9279 (&symfile_complaints
,
9280 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9281 hex_string (DW_UNSND (attr
)));
9282 DW_UNSND (attr
) = 0;
9288 /* Read an attribute described by an abbreviated attribute. */
9291 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9292 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9294 attr
->name
= abbrev
->name
;
9295 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9298 /* read dwarf information from a buffer */
9301 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9303 return bfd_get_8 (abfd
, buf
);
9307 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9309 return bfd_get_signed_8 (abfd
, buf
);
9313 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9315 return bfd_get_16 (abfd
, buf
);
9319 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9321 return bfd_get_signed_16 (abfd
, buf
);
9325 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9327 return bfd_get_32 (abfd
, buf
);
9331 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9333 return bfd_get_signed_32 (abfd
, buf
);
9337 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9339 return bfd_get_64 (abfd
, buf
);
9343 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9344 unsigned int *bytes_read
)
9346 struct comp_unit_head
*cu_header
= &cu
->header
;
9347 CORE_ADDR retval
= 0;
9349 if (cu_header
->signed_addr_p
)
9351 switch (cu_header
->addr_size
)
9354 retval
= bfd_get_signed_16 (abfd
, buf
);
9357 retval
= bfd_get_signed_32 (abfd
, buf
);
9360 retval
= bfd_get_signed_64 (abfd
, buf
);
9363 internal_error (__FILE__
, __LINE__
,
9364 _("read_address: bad switch, signed [in module %s]"),
9365 bfd_get_filename (abfd
));
9370 switch (cu_header
->addr_size
)
9373 retval
= bfd_get_16 (abfd
, buf
);
9376 retval
= bfd_get_32 (abfd
, buf
);
9379 retval
= bfd_get_64 (abfd
, buf
);
9382 internal_error (__FILE__
, __LINE__
,
9383 _("read_address: bad switch, unsigned [in module %s]"),
9384 bfd_get_filename (abfd
));
9388 *bytes_read
= cu_header
->addr_size
;
9392 /* Read the initial length from a section. The (draft) DWARF 3
9393 specification allows the initial length to take up either 4 bytes
9394 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9395 bytes describe the length and all offsets will be 8 bytes in length
9398 An older, non-standard 64-bit format is also handled by this
9399 function. The older format in question stores the initial length
9400 as an 8-byte quantity without an escape value. Lengths greater
9401 than 2^32 aren't very common which means that the initial 4 bytes
9402 is almost always zero. Since a length value of zero doesn't make
9403 sense for the 32-bit format, this initial zero can be considered to
9404 be an escape value which indicates the presence of the older 64-bit
9405 format. As written, the code can't detect (old format) lengths
9406 greater than 4GB. If it becomes necessary to handle lengths
9407 somewhat larger than 4GB, we could allow other small values (such
9408 as the non-sensical values of 1, 2, and 3) to also be used as
9409 escape values indicating the presence of the old format.
9411 The value returned via bytes_read should be used to increment the
9412 relevant pointer after calling read_initial_length().
9414 [ Note: read_initial_length() and read_offset() are based on the
9415 document entitled "DWARF Debugging Information Format", revision
9416 3, draft 8, dated November 19, 2001. This document was obtained
9419 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9421 This document is only a draft and is subject to change. (So beware.)
9423 Details regarding the older, non-standard 64-bit format were
9424 determined empirically by examining 64-bit ELF files produced by
9425 the SGI toolchain on an IRIX 6.5 machine.
9427 - Kevin, July 16, 2002
9431 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9433 LONGEST length
= bfd_get_32 (abfd
, buf
);
9435 if (length
== 0xffffffff)
9437 length
= bfd_get_64 (abfd
, buf
+ 4);
9440 else if (length
== 0)
9442 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9443 length
= bfd_get_64 (abfd
, buf
);
9454 /* Cover function for read_initial_length.
9455 Returns the length of the object at BUF, and stores the size of the
9456 initial length in *BYTES_READ and stores the size that offsets will be in
9458 If the initial length size is not equivalent to that specified in
9459 CU_HEADER then issue a complaint.
9460 This is useful when reading non-comp-unit headers. */
9463 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9464 const struct comp_unit_head
*cu_header
,
9465 unsigned int *bytes_read
,
9466 unsigned int *offset_size
)
9468 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9470 gdb_assert (cu_header
->initial_length_size
== 4
9471 || cu_header
->initial_length_size
== 8
9472 || cu_header
->initial_length_size
== 12);
9474 if (cu_header
->initial_length_size
!= *bytes_read
)
9475 complaint (&symfile_complaints
,
9476 _("intermixed 32-bit and 64-bit DWARF sections"));
9478 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9482 /* Read an offset from the data stream. The size of the offset is
9483 given by cu_header->offset_size. */
9486 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9487 unsigned int *bytes_read
)
9489 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9491 *bytes_read
= cu_header
->offset_size
;
9495 /* Read an offset from the data stream. */
9498 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9502 switch (offset_size
)
9505 retval
= bfd_get_32 (abfd
, buf
);
9508 retval
= bfd_get_64 (abfd
, buf
);
9511 internal_error (__FILE__
, __LINE__
,
9512 _("read_offset_1: bad switch [in module %s]"),
9513 bfd_get_filename (abfd
));
9520 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9522 /* If the size of a host char is 8 bits, we can return a pointer
9523 to the buffer, otherwise we have to copy the data to a buffer
9524 allocated on the temporary obstack. */
9525 gdb_assert (HOST_CHAR_BIT
== 8);
9530 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9532 /* If the size of a host char is 8 bits, we can return a pointer
9533 to the string, otherwise we have to copy the string to a buffer
9534 allocated on the temporary obstack. */
9535 gdb_assert (HOST_CHAR_BIT
== 8);
9538 *bytes_read_ptr
= 1;
9541 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9542 return (char *) buf
;
9546 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9547 const struct comp_unit_head
*cu_header
,
9548 unsigned int *bytes_read_ptr
)
9550 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9552 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9553 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9555 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9556 bfd_get_filename (abfd
));
9559 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9561 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9562 bfd_get_filename (abfd
));
9565 gdb_assert (HOST_CHAR_BIT
== 8);
9566 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9568 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9571 static unsigned long
9572 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9574 unsigned long result
;
9575 unsigned int num_read
;
9585 byte
= bfd_get_8 (abfd
, buf
);
9588 result
|= ((unsigned long)(byte
& 127) << shift
);
9589 if ((byte
& 128) == 0)
9595 *bytes_read_ptr
= num_read
;
9600 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9603 int i
, shift
, num_read
;
9612 byte
= bfd_get_8 (abfd
, buf
);
9615 result
|= ((long)(byte
& 127) << shift
);
9617 if ((byte
& 128) == 0)
9622 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9623 result
|= -(((long)1) << shift
);
9624 *bytes_read_ptr
= num_read
;
9628 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9631 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9637 byte
= bfd_get_8 (abfd
, buf
);
9639 if ((byte
& 128) == 0)
9645 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9652 cu
->language
= language_c
;
9654 case DW_LANG_C_plus_plus
:
9655 cu
->language
= language_cplus
;
9658 cu
->language
= language_d
;
9660 case DW_LANG_Fortran77
:
9661 case DW_LANG_Fortran90
:
9662 case DW_LANG_Fortran95
:
9663 cu
->language
= language_fortran
;
9665 case DW_LANG_Mips_Assembler
:
9666 cu
->language
= language_asm
;
9669 cu
->language
= language_java
;
9673 cu
->language
= language_ada
;
9675 case DW_LANG_Modula2
:
9676 cu
->language
= language_m2
;
9678 case DW_LANG_Pascal83
:
9679 cu
->language
= language_pascal
;
9682 cu
->language
= language_objc
;
9684 case DW_LANG_Cobol74
:
9685 case DW_LANG_Cobol85
:
9687 cu
->language
= language_minimal
;
9690 cu
->language_defn
= language_def (cu
->language
);
9693 /* Return the named attribute or NULL if not there. */
9695 static struct attribute
*
9696 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9699 struct attribute
*spec
= NULL
;
9701 for (i
= 0; i
< die
->num_attrs
; ++i
)
9703 if (die
->attrs
[i
].name
== name
)
9704 return &die
->attrs
[i
];
9705 if (die
->attrs
[i
].name
== DW_AT_specification
9706 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9707 spec
= &die
->attrs
[i
];
9712 die
= follow_die_ref (die
, spec
, &cu
);
9713 return dwarf2_attr (die
, name
, cu
);
9719 /* Return the named attribute or NULL if not there,
9720 but do not follow DW_AT_specification, etc.
9721 This is for use in contexts where we're reading .debug_types dies.
9722 Following DW_AT_specification, DW_AT_abstract_origin will take us
9723 back up the chain, and we want to go down. */
9725 static struct attribute
*
9726 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9727 struct dwarf2_cu
*cu
)
9731 for (i
= 0; i
< die
->num_attrs
; ++i
)
9732 if (die
->attrs
[i
].name
== name
)
9733 return &die
->attrs
[i
];
9738 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9739 and holds a non-zero value. This function should only be used for
9740 DW_FORM_flag or DW_FORM_flag_present attributes. */
9743 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9745 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9747 return (attr
&& DW_UNSND (attr
));
9751 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9753 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9754 which value is non-zero. However, we have to be careful with
9755 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9756 (via dwarf2_flag_true_p) follows this attribute. So we may
9757 end up accidently finding a declaration attribute that belongs
9758 to a different DIE referenced by the specification attribute,
9759 even though the given DIE does not have a declaration attribute. */
9760 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9761 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9764 /* Return the die giving the specification for DIE, if there is
9765 one. *SPEC_CU is the CU containing DIE on input, and the CU
9766 containing the return value on output. If there is no
9767 specification, but there is an abstract origin, that is
9770 static struct die_info
*
9771 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9773 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9776 if (spec_attr
== NULL
)
9777 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9779 if (spec_attr
== NULL
)
9782 return follow_die_ref (die
, spec_attr
, spec_cu
);
9785 /* Free the line_header structure *LH, and any arrays and strings it
9788 free_line_header (struct line_header
*lh
)
9790 if (lh
->standard_opcode_lengths
)
9791 xfree (lh
->standard_opcode_lengths
);
9793 /* Remember that all the lh->file_names[i].name pointers are
9794 pointers into debug_line_buffer, and don't need to be freed. */
9796 xfree (lh
->file_names
);
9798 /* Similarly for the include directory names. */
9799 if (lh
->include_dirs
)
9800 xfree (lh
->include_dirs
);
9806 /* Add an entry to LH's include directory table. */
9808 add_include_dir (struct line_header
*lh
, char *include_dir
)
9810 /* Grow the array if necessary. */
9811 if (lh
->include_dirs_size
== 0)
9813 lh
->include_dirs_size
= 1; /* for testing */
9814 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9815 * sizeof (*lh
->include_dirs
));
9817 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9819 lh
->include_dirs_size
*= 2;
9820 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9821 (lh
->include_dirs_size
9822 * sizeof (*lh
->include_dirs
)));
9825 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9829 /* Add an entry to LH's file name table. */
9831 add_file_name (struct line_header
*lh
,
9833 unsigned int dir_index
,
9834 unsigned int mod_time
,
9835 unsigned int length
)
9837 struct file_entry
*fe
;
9839 /* Grow the array if necessary. */
9840 if (lh
->file_names_size
== 0)
9842 lh
->file_names_size
= 1; /* for testing */
9843 lh
->file_names
= xmalloc (lh
->file_names_size
9844 * sizeof (*lh
->file_names
));
9846 else if (lh
->num_file_names
>= lh
->file_names_size
)
9848 lh
->file_names_size
*= 2;
9849 lh
->file_names
= xrealloc (lh
->file_names
,
9850 (lh
->file_names_size
9851 * sizeof (*lh
->file_names
)));
9854 fe
= &lh
->file_names
[lh
->num_file_names
++];
9856 fe
->dir_index
= dir_index
;
9857 fe
->mod_time
= mod_time
;
9858 fe
->length
= length
;
9864 /* Read the statement program header starting at OFFSET in
9865 .debug_line, according to the endianness of ABFD. Return a pointer
9866 to a struct line_header, allocated using xmalloc.
9868 NOTE: the strings in the include directory and file name tables of
9869 the returned object point into debug_line_buffer, and must not be
9871 static struct line_header
*
9872 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9873 struct dwarf2_cu
*cu
)
9875 struct cleanup
*back_to
;
9876 struct line_header
*lh
;
9878 unsigned int bytes_read
, offset_size
;
9880 char *cur_dir
, *cur_file
;
9882 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9883 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9885 complaint (&symfile_complaints
, _("missing .debug_line section"));
9889 /* Make sure that at least there's room for the total_length field.
9890 That could be 12 bytes long, but we're just going to fudge that. */
9891 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9893 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9897 lh
= xmalloc (sizeof (*lh
));
9898 memset (lh
, 0, sizeof (*lh
));
9899 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9902 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9904 /* Read in the header. */
9906 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9907 &bytes_read
, &offset_size
);
9908 line_ptr
+= bytes_read
;
9909 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9910 + dwarf2_per_objfile
->line
.size
))
9912 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9915 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9916 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9918 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9919 line_ptr
+= offset_size
;
9920 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9922 if (lh
->version
>= 4)
9924 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9928 lh
->maximum_ops_per_instruction
= 1;
9930 if (lh
->maximum_ops_per_instruction
== 0)
9932 lh
->maximum_ops_per_instruction
= 1;
9933 complaint (&symfile_complaints
,
9934 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9937 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9939 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9941 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9943 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9945 lh
->standard_opcode_lengths
9946 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9948 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9949 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9951 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9955 /* Read directory table. */
9956 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9958 line_ptr
+= bytes_read
;
9959 add_include_dir (lh
, cur_dir
);
9961 line_ptr
+= bytes_read
;
9963 /* Read file name table. */
9964 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9966 unsigned int dir_index
, mod_time
, length
;
9968 line_ptr
+= bytes_read
;
9969 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9970 line_ptr
+= bytes_read
;
9971 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9972 line_ptr
+= bytes_read
;
9973 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9974 line_ptr
+= bytes_read
;
9976 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9978 line_ptr
+= bytes_read
;
9979 lh
->statement_program_start
= line_ptr
;
9981 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9982 + dwarf2_per_objfile
->line
.size
))
9983 complaint (&symfile_complaints
,
9984 _("line number info header doesn't fit in `.debug_line' section"));
9986 discard_cleanups (back_to
);
9990 /* This function exists to work around a bug in certain compilers
9991 (particularly GCC 2.95), in which the first line number marker of a
9992 function does not show up until after the prologue, right before
9993 the second line number marker. This function shifts ADDRESS down
9994 to the beginning of the function if necessary, and is called on
9995 addresses passed to record_line. */
9998 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
10000 struct function_range
*fn
;
10002 /* Find the function_range containing address. */
10006 if (!cu
->cached_fn
)
10007 cu
->cached_fn
= cu
->first_fn
;
10009 fn
= cu
->cached_fn
;
10011 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10017 while (fn
&& fn
!= cu
->cached_fn
)
10018 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10028 if (address
!= fn
->lowpc
)
10029 complaint (&symfile_complaints
,
10030 _("misplaced first line number at 0x%lx for '%s'"),
10031 (unsigned long) address
, fn
->name
);
10036 /* Subroutine of dwarf_decode_lines to simplify it.
10037 Return the file name of the psymtab for included file FILE_INDEX
10038 in line header LH of PST.
10039 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10040 If space for the result is malloc'd, it will be freed by a cleanup.
10041 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10044 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
10045 const struct partial_symtab
*pst
,
10046 const char *comp_dir
)
10048 const struct file_entry fe
= lh
->file_names
[file_index
];
10049 char *include_name
= fe
.name
;
10050 char *include_name_to_compare
= include_name
;
10051 char *dir_name
= NULL
;
10052 const char *pst_filename
;
10053 char *copied_name
= NULL
;
10057 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
10059 if (!IS_ABSOLUTE_PATH (include_name
)
10060 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
10062 /* Avoid creating a duplicate psymtab for PST.
10063 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10064 Before we do the comparison, however, we need to account
10065 for DIR_NAME and COMP_DIR.
10066 First prepend dir_name (if non-NULL). If we still don't
10067 have an absolute path prepend comp_dir (if non-NULL).
10068 However, the directory we record in the include-file's
10069 psymtab does not contain COMP_DIR (to match the
10070 corresponding symtab(s)).
10075 bash$ gcc -g ./hello.c
10076 include_name = "hello.c"
10078 DW_AT_comp_dir = comp_dir = "/tmp"
10079 DW_AT_name = "./hello.c" */
10081 if (dir_name
!= NULL
)
10083 include_name
= concat (dir_name
, SLASH_STRING
,
10084 include_name
, (char *)NULL
);
10085 include_name_to_compare
= include_name
;
10086 make_cleanup (xfree
, include_name
);
10088 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10090 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10091 include_name
, (char *)NULL
);
10095 pst_filename
= pst
->filename
;
10096 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10098 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
10099 pst_filename
, (char *)NULL
);
10100 pst_filename
= copied_name
;
10103 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
10105 if (include_name_to_compare
!= include_name
)
10106 xfree (include_name_to_compare
);
10107 if (copied_name
!= NULL
)
10108 xfree (copied_name
);
10112 return include_name
;
10115 /* Decode the Line Number Program (LNP) for the given line_header
10116 structure and CU. The actual information extracted and the type
10117 of structures created from the LNP depends on the value of PST.
10119 1. If PST is NULL, then this procedure uses the data from the program
10120 to create all necessary symbol tables, and their linetables.
10122 2. If PST is not NULL, this procedure reads the program to determine
10123 the list of files included by the unit represented by PST, and
10124 builds all the associated partial symbol tables.
10126 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10127 It is used for relative paths in the line table.
10128 NOTE: When processing partial symtabs (pst != NULL),
10129 comp_dir == pst->dirname.
10131 NOTE: It is important that psymtabs have the same file name (via strcmp)
10132 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10133 symtab we don't use it in the name of the psymtabs we create.
10134 E.g. expand_line_sal requires this when finding psymtabs to expand.
10135 A good testcase for this is mb-inline.exp. */
10138 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
, bfd
*abfd
,
10139 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10141 gdb_byte
*line_ptr
, *extended_end
;
10142 gdb_byte
*line_end
;
10143 unsigned int bytes_read
, extended_len
;
10144 unsigned char op_code
, extended_op
, adj_opcode
;
10145 CORE_ADDR baseaddr
;
10146 struct objfile
*objfile
= cu
->objfile
;
10147 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10148 const int decode_for_pst_p
= (pst
!= NULL
);
10149 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10151 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10153 line_ptr
= lh
->statement_program_start
;
10154 line_end
= lh
->statement_program_end
;
10156 /* Read the statement sequences until there's nothing left. */
10157 while (line_ptr
< line_end
)
10159 /* state machine registers */
10160 CORE_ADDR address
= 0;
10161 unsigned int file
= 1;
10162 unsigned int line
= 1;
10163 unsigned int column
= 0;
10164 int is_stmt
= lh
->default_is_stmt
;
10165 int basic_block
= 0;
10166 int end_sequence
= 0;
10168 unsigned char op_index
= 0;
10170 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10172 /* Start a subfile for the current file of the state machine. */
10173 /* lh->include_dirs and lh->file_names are 0-based, but the
10174 directory and file name numbers in the statement program
10176 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10180 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10182 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10185 /* Decode the table. */
10186 while (!end_sequence
)
10188 op_code
= read_1_byte (abfd
, line_ptr
);
10190 if (line_ptr
> line_end
)
10192 dwarf2_debug_line_missing_end_sequence_complaint ();
10196 if (op_code
>= lh
->opcode_base
)
10198 /* Special operand. */
10199 adj_opcode
= op_code
- lh
->opcode_base
;
10200 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10201 / lh
->maximum_ops_per_instruction
)
10202 * lh
->minimum_instruction_length
);
10203 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10204 % lh
->maximum_ops_per_instruction
);
10205 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10206 if (lh
->num_file_names
< file
|| file
== 0)
10207 dwarf2_debug_line_missing_file_complaint ();
10208 /* For now we ignore lines not starting on an
10209 instruction boundary. */
10210 else if (op_index
== 0)
10212 lh
->file_names
[file
- 1].included_p
= 1;
10213 if (!decode_for_pst_p
&& is_stmt
)
10215 if (last_subfile
!= current_subfile
)
10217 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10219 record_line (last_subfile
, 0, addr
);
10220 last_subfile
= current_subfile
;
10222 /* Append row to matrix using current values. */
10223 addr
= check_cu_functions (address
, cu
);
10224 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10225 record_line (current_subfile
, line
, addr
);
10230 else switch (op_code
)
10232 case DW_LNS_extended_op
:
10233 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10234 line_ptr
+= bytes_read
;
10235 extended_end
= line_ptr
+ extended_len
;
10236 extended_op
= read_1_byte (abfd
, line_ptr
);
10238 switch (extended_op
)
10240 case DW_LNE_end_sequence
:
10243 case DW_LNE_set_address
:
10244 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10246 line_ptr
+= bytes_read
;
10247 address
+= baseaddr
;
10249 case DW_LNE_define_file
:
10252 unsigned int dir_index
, mod_time
, length
;
10254 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10255 line_ptr
+= bytes_read
;
10257 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10258 line_ptr
+= bytes_read
;
10260 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10261 line_ptr
+= bytes_read
;
10263 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10264 line_ptr
+= bytes_read
;
10265 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10268 case DW_LNE_set_discriminator
:
10269 /* The discriminator is not interesting to the debugger;
10271 line_ptr
= extended_end
;
10274 complaint (&symfile_complaints
,
10275 _("mangled .debug_line section"));
10278 /* Make sure that we parsed the extended op correctly. If e.g.
10279 we expected a different address size than the producer used,
10280 we may have read the wrong number of bytes. */
10281 if (line_ptr
!= extended_end
)
10283 complaint (&symfile_complaints
,
10284 _("mangled .debug_line section"));
10289 if (lh
->num_file_names
< file
|| file
== 0)
10290 dwarf2_debug_line_missing_file_complaint ();
10293 lh
->file_names
[file
- 1].included_p
= 1;
10294 if (!decode_for_pst_p
&& is_stmt
)
10296 if (last_subfile
!= current_subfile
)
10298 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10300 record_line (last_subfile
, 0, addr
);
10301 last_subfile
= current_subfile
;
10303 addr
= check_cu_functions (address
, cu
);
10304 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10305 record_line (current_subfile
, line
, addr
);
10310 case DW_LNS_advance_pc
:
10313 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10315 address
+= (((op_index
+ adjust
)
10316 / lh
->maximum_ops_per_instruction
)
10317 * lh
->minimum_instruction_length
);
10318 op_index
= ((op_index
+ adjust
)
10319 % lh
->maximum_ops_per_instruction
);
10320 line_ptr
+= bytes_read
;
10323 case DW_LNS_advance_line
:
10324 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10325 line_ptr
+= bytes_read
;
10327 case DW_LNS_set_file
:
10329 /* The arrays lh->include_dirs and lh->file_names are
10330 0-based, but the directory and file name numbers in
10331 the statement program are 1-based. */
10332 struct file_entry
*fe
;
10335 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10336 line_ptr
+= bytes_read
;
10337 if (lh
->num_file_names
< file
|| file
== 0)
10338 dwarf2_debug_line_missing_file_complaint ();
10341 fe
= &lh
->file_names
[file
- 1];
10343 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10344 if (!decode_for_pst_p
)
10346 last_subfile
= current_subfile
;
10347 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10352 case DW_LNS_set_column
:
10353 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10354 line_ptr
+= bytes_read
;
10356 case DW_LNS_negate_stmt
:
10357 is_stmt
= (!is_stmt
);
10359 case DW_LNS_set_basic_block
:
10362 /* Add to the address register of the state machine the
10363 address increment value corresponding to special opcode
10364 255. I.e., this value is scaled by the minimum
10365 instruction length since special opcode 255 would have
10366 scaled the the increment. */
10367 case DW_LNS_const_add_pc
:
10369 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10371 address
+= (((op_index
+ adjust
)
10372 / lh
->maximum_ops_per_instruction
)
10373 * lh
->minimum_instruction_length
);
10374 op_index
= ((op_index
+ adjust
)
10375 % lh
->maximum_ops_per_instruction
);
10378 case DW_LNS_fixed_advance_pc
:
10379 address
+= read_2_bytes (abfd
, line_ptr
);
10385 /* Unknown standard opcode, ignore it. */
10388 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10390 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10391 line_ptr
+= bytes_read
;
10396 if (lh
->num_file_names
< file
|| file
== 0)
10397 dwarf2_debug_line_missing_file_complaint ();
10400 lh
->file_names
[file
- 1].included_p
= 1;
10401 if (!decode_for_pst_p
)
10403 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10404 record_line (current_subfile
, 0, addr
);
10409 if (decode_for_pst_p
)
10413 /* Now that we're done scanning the Line Header Program, we can
10414 create the psymtab of each included file. */
10415 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10416 if (lh
->file_names
[file_index
].included_p
== 1)
10418 char *include_name
=
10419 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10420 if (include_name
!= NULL
)
10421 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10426 /* Make sure a symtab is created for every file, even files
10427 which contain only variables (i.e. no code with associated
10431 struct file_entry
*fe
;
10433 for (i
= 0; i
< lh
->num_file_names
; i
++)
10437 fe
= &lh
->file_names
[i
];
10439 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10440 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10442 /* Skip the main file; we don't need it, and it must be
10443 allocated last, so that it will show up before the
10444 non-primary symtabs in the objfile's symtab list. */
10445 if (current_subfile
== first_subfile
)
10448 if (current_subfile
->symtab
== NULL
)
10449 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10451 fe
->symtab
= current_subfile
->symtab
;
10456 /* Start a subfile for DWARF. FILENAME is the name of the file and
10457 DIRNAME the name of the source directory which contains FILENAME
10458 or NULL if not known. COMP_DIR is the compilation directory for the
10459 linetable's compilation unit or NULL if not known.
10460 This routine tries to keep line numbers from identical absolute and
10461 relative file names in a common subfile.
10463 Using the `list' example from the GDB testsuite, which resides in
10464 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10465 of /srcdir/list0.c yields the following debugging information for list0.c:
10467 DW_AT_name: /srcdir/list0.c
10468 DW_AT_comp_dir: /compdir
10469 files.files[0].name: list0.h
10470 files.files[0].dir: /srcdir
10471 files.files[1].name: list0.c
10472 files.files[1].dir: /srcdir
10474 The line number information for list0.c has to end up in a single
10475 subfile, so that `break /srcdir/list0.c:1' works as expected.
10476 start_subfile will ensure that this happens provided that we pass the
10477 concatenation of files.files[1].dir and files.files[1].name as the
10481 dwarf2_start_subfile (char *filename
, const char *dirname
, const char *comp_dir
)
10485 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10486 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10487 second argument to start_subfile. To be consistent, we do the
10488 same here. In order not to lose the line information directory,
10489 we concatenate it to the filename when it makes sense.
10490 Note that the Dwarf3 standard says (speaking of filenames in line
10491 information): ``The directory index is ignored for file names
10492 that represent full path names''. Thus ignoring dirname in the
10493 `else' branch below isn't an issue. */
10495 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10496 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10498 fullname
= filename
;
10500 start_subfile (fullname
, comp_dir
);
10502 if (fullname
!= filename
)
10507 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10508 struct dwarf2_cu
*cu
)
10510 struct objfile
*objfile
= cu
->objfile
;
10511 struct comp_unit_head
*cu_header
= &cu
->header
;
10513 /* NOTE drow/2003-01-30: There used to be a comment and some special
10514 code here to turn a symbol with DW_AT_external and a
10515 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10516 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10517 with some versions of binutils) where shared libraries could have
10518 relocations against symbols in their debug information - the
10519 minimal symbol would have the right address, but the debug info
10520 would not. It's no longer necessary, because we will explicitly
10521 apply relocations when we read in the debug information now. */
10523 /* A DW_AT_location attribute with no contents indicates that a
10524 variable has been optimized away. */
10525 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10527 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10531 /* Handle one degenerate form of location expression specially, to
10532 preserve GDB's previous behavior when section offsets are
10533 specified. If this is just a DW_OP_addr then mark this symbol
10536 if (attr_form_is_block (attr
)
10537 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10538 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10540 unsigned int dummy
;
10542 SYMBOL_VALUE_ADDRESS (sym
) =
10543 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10544 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10545 fixup_symbol_section (sym
, objfile
);
10546 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10547 SYMBOL_SECTION (sym
));
10551 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10552 expression evaluator, and use LOC_COMPUTED only when necessary
10553 (i.e. when the value of a register or memory location is
10554 referenced, or a thread-local block, etc.). Then again, it might
10555 not be worthwhile. I'm assuming that it isn't unless performance
10556 or memory numbers show me otherwise. */
10558 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10559 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10562 /* Given a pointer to a DWARF information entry, figure out if we need
10563 to make a symbol table entry for it, and if so, create a new entry
10564 and return a pointer to it.
10565 If TYPE is NULL, determine symbol type from the die, otherwise
10566 used the passed type.
10567 If SPACE is not NULL, use it to hold the new symbol. If it is
10568 NULL, allocate a new symbol on the objfile's obstack. */
10570 static struct symbol
*
10571 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10572 struct symbol
*space
)
10574 struct objfile
*objfile
= cu
->objfile
;
10575 struct symbol
*sym
= NULL
;
10577 struct attribute
*attr
= NULL
;
10578 struct attribute
*attr2
= NULL
;
10579 CORE_ADDR baseaddr
;
10580 struct pending
**list_to_add
= NULL
;
10582 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10584 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10586 name
= dwarf2_name (die
, cu
);
10589 const char *linkagename
;
10590 int suppress_add
= 0;
10595 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10596 OBJSTAT (objfile
, n_syms
++);
10598 /* Cache this symbol's name and the name's demangled form (if any). */
10599 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10600 linkagename
= dwarf2_physname (name
, die
, cu
);
10601 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10603 /* Fortran does not have mangling standard and the mangling does differ
10604 between gfortran, iFort etc. */
10605 if (cu
->language
== language_fortran
10606 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10607 symbol_set_demangled_name (&(sym
->ginfo
),
10608 (char *) dwarf2_full_name (name
, die
, cu
),
10611 /* Default assumptions.
10612 Use the passed type or decode it from the die. */
10613 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10614 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10616 SYMBOL_TYPE (sym
) = type
;
10618 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10619 attr
= dwarf2_attr (die
,
10620 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10624 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10627 attr
= dwarf2_attr (die
,
10628 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10632 int file_index
= DW_UNSND (attr
);
10634 if (cu
->line_header
== NULL
10635 || file_index
> cu
->line_header
->num_file_names
)
10636 complaint (&symfile_complaints
,
10637 _("file index out of range"));
10638 else if (file_index
> 0)
10640 struct file_entry
*fe
;
10642 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10643 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10650 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10653 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10655 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10656 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10657 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10658 add_symbol_to_list (sym
, cu
->list_in_scope
);
10660 case DW_TAG_subprogram
:
10661 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10663 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10664 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10665 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10666 || cu
->language
== language_ada
)
10668 /* Subprograms marked external are stored as a global symbol.
10669 Ada subprograms, whether marked external or not, are always
10670 stored as a global symbol, because we want to be able to
10671 access them globally. For instance, we want to be able
10672 to break on a nested subprogram without having to
10673 specify the context. */
10674 list_to_add
= &global_symbols
;
10678 list_to_add
= cu
->list_in_scope
;
10681 case DW_TAG_inlined_subroutine
:
10682 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10684 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10685 SYMBOL_INLINED (sym
) = 1;
10686 /* Do not add the symbol to any lists. It will be found via
10687 BLOCK_FUNCTION from the blockvector. */
10689 case DW_TAG_template_value_param
:
10691 /* Fall through. */
10692 case DW_TAG_constant
:
10693 case DW_TAG_variable
:
10694 case DW_TAG_member
:
10695 /* Compilation with minimal debug info may result in variables
10696 with missing type entries. Change the misleading `void' type
10697 to something sensible. */
10698 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10700 = objfile_type (objfile
)->nodebug_data_symbol
;
10702 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10703 /* In the case of DW_TAG_member, we should only be called for
10704 static const members. */
10705 if (die
->tag
== DW_TAG_member
)
10707 /* dwarf2_add_field uses die_is_declaration,
10708 so we do the same. */
10709 gdb_assert (die_is_declaration (die
, cu
));
10714 dwarf2_const_value (attr
, sym
, cu
);
10715 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10718 if (attr2
&& (DW_UNSND (attr2
) != 0))
10719 list_to_add
= &global_symbols
;
10721 list_to_add
= cu
->list_in_scope
;
10725 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10728 var_decode_location (attr
, sym
, cu
);
10729 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10730 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10731 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10732 && !dwarf2_per_objfile
->has_section_at_zero
)
10734 /* When a static variable is eliminated by the linker,
10735 the corresponding debug information is not stripped
10736 out, but the variable address is set to null;
10737 do not add such variables into symbol table. */
10739 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10741 /* Workaround gfortran PR debug/40040 - it uses
10742 DW_AT_location for variables in -fPIC libraries which may
10743 get overriden by other libraries/executable and get
10744 a different address. Resolve it by the minimal symbol
10745 which may come from inferior's executable using copy
10746 relocation. Make this workaround only for gfortran as for
10747 other compilers GDB cannot guess the minimal symbol
10748 Fortran mangling kind. */
10749 if (cu
->language
== language_fortran
&& die
->parent
10750 && die
->parent
->tag
== DW_TAG_module
10752 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10753 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10755 /* A variable with DW_AT_external is never static,
10756 but it may be block-scoped. */
10757 list_to_add
= (cu
->list_in_scope
== &file_symbols
10758 ? &global_symbols
: cu
->list_in_scope
);
10761 list_to_add
= cu
->list_in_scope
;
10765 /* We do not know the address of this symbol.
10766 If it is an external symbol and we have type information
10767 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10768 The address of the variable will then be determined from
10769 the minimal symbol table whenever the variable is
10771 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10772 if (attr2
&& (DW_UNSND (attr2
) != 0)
10773 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10775 /* A variable with DW_AT_external is never static, but it
10776 may be block-scoped. */
10777 list_to_add
= (cu
->list_in_scope
== &file_symbols
10778 ? &global_symbols
: cu
->list_in_scope
);
10780 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10782 else if (!die_is_declaration (die
, cu
))
10784 /* Use the default LOC_OPTIMIZED_OUT class. */
10785 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10787 list_to_add
= cu
->list_in_scope
;
10791 case DW_TAG_formal_parameter
:
10792 /* If we are inside a function, mark this as an argument. If
10793 not, we might be looking at an argument to an inlined function
10794 when we do not have enough information to show inlined frames;
10795 pretend it's a local variable in that case so that the user can
10797 if (context_stack_depth
> 0
10798 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10799 SYMBOL_IS_ARGUMENT (sym
) = 1;
10800 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10803 var_decode_location (attr
, sym
, cu
);
10805 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10808 dwarf2_const_value (attr
, sym
, cu
);
10810 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10811 if (attr
&& DW_UNSND (attr
))
10813 struct type
*ref_type
;
10815 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10816 SYMBOL_TYPE (sym
) = ref_type
;
10819 list_to_add
= cu
->list_in_scope
;
10821 case DW_TAG_unspecified_parameters
:
10822 /* From varargs functions; gdb doesn't seem to have any
10823 interest in this information, so just ignore it for now.
10826 case DW_TAG_template_type_param
:
10828 /* Fall through. */
10829 case DW_TAG_class_type
:
10830 case DW_TAG_interface_type
:
10831 case DW_TAG_structure_type
:
10832 case DW_TAG_union_type
:
10833 case DW_TAG_set_type
:
10834 case DW_TAG_enumeration_type
:
10835 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10836 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10839 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10840 really ever be static objects: otherwise, if you try
10841 to, say, break of a class's method and you're in a file
10842 which doesn't mention that class, it won't work unless
10843 the check for all static symbols in lookup_symbol_aux
10844 saves you. See the OtherFileClass tests in
10845 gdb.c++/namespace.exp. */
10849 list_to_add
= (cu
->list_in_scope
== &file_symbols
10850 && (cu
->language
== language_cplus
10851 || cu
->language
== language_java
)
10852 ? &global_symbols
: cu
->list_in_scope
);
10854 /* The semantics of C++ state that "struct foo {
10855 ... }" also defines a typedef for "foo". A Java
10856 class declaration also defines a typedef for the
10858 if (cu
->language
== language_cplus
10859 || cu
->language
== language_java
10860 || cu
->language
== language_ada
)
10862 /* The symbol's name is already allocated along
10863 with this objfile, so we don't need to
10864 duplicate it for the type. */
10865 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10866 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10871 case DW_TAG_typedef
:
10872 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10873 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10874 list_to_add
= cu
->list_in_scope
;
10876 case DW_TAG_base_type
:
10877 case DW_TAG_subrange_type
:
10878 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10879 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10880 list_to_add
= cu
->list_in_scope
;
10882 case DW_TAG_enumerator
:
10883 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10886 dwarf2_const_value (attr
, sym
, cu
);
10889 /* NOTE: carlton/2003-11-10: See comment above in the
10890 DW_TAG_class_type, etc. block. */
10892 list_to_add
= (cu
->list_in_scope
== &file_symbols
10893 && (cu
->language
== language_cplus
10894 || cu
->language
== language_java
)
10895 ? &global_symbols
: cu
->list_in_scope
);
10898 case DW_TAG_namespace
:
10899 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10900 list_to_add
= &global_symbols
;
10903 /* Not a tag we recognize. Hopefully we aren't processing
10904 trash data, but since we must specifically ignore things
10905 we don't recognize, there is nothing else we should do at
10907 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10908 dwarf_tag_name (die
->tag
));
10914 sym
->hash_next
= objfile
->template_symbols
;
10915 objfile
->template_symbols
= sym
;
10916 list_to_add
= NULL
;
10919 if (list_to_add
!= NULL
)
10920 add_symbol_to_list (sym
, list_to_add
);
10922 /* For the benefit of old versions of GCC, check for anonymous
10923 namespaces based on the demangled name. */
10924 if (!processing_has_namespace_info
10925 && cu
->language
== language_cplus
)
10926 cp_scan_for_anonymous_namespaces (sym
);
10931 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10933 static struct symbol
*
10934 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10936 return new_symbol_full (die
, type
, cu
, NULL
);
10939 /* Given an attr with a DW_FORM_dataN value in host byte order,
10940 zero-extend it as appropriate for the symbol's type. The DWARF
10941 standard (v4) is not entirely clear about the meaning of using
10942 DW_FORM_dataN for a constant with a signed type, where the type is
10943 wider than the data. The conclusion of a discussion on the DWARF
10944 list was that this is unspecified. We choose to always zero-extend
10945 because that is the interpretation long in use by GCC. */
10948 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10949 const char *name
, struct obstack
*obstack
,
10950 struct dwarf2_cu
*cu
, long *value
, int bits
)
10952 struct objfile
*objfile
= cu
->objfile
;
10953 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10954 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10955 LONGEST l
= DW_UNSND (attr
);
10957 if (bits
< sizeof (*value
) * 8)
10959 l
&= ((LONGEST
) 1 << bits
) - 1;
10962 else if (bits
== sizeof (*value
) * 8)
10966 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10967 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10974 /* Read a constant value from an attribute. Either set *VALUE, or if
10975 the value does not fit in *VALUE, set *BYTES - either already
10976 allocated on the objfile obstack, or newly allocated on OBSTACK,
10977 or, set *BATON, if we translated the constant to a location
10981 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10982 const char *name
, struct obstack
*obstack
,
10983 struct dwarf2_cu
*cu
,
10984 long *value
, gdb_byte
**bytes
,
10985 struct dwarf2_locexpr_baton
**baton
)
10987 struct objfile
*objfile
= cu
->objfile
;
10988 struct comp_unit_head
*cu_header
= &cu
->header
;
10989 struct dwarf_block
*blk
;
10990 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10991 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10997 switch (attr
->form
)
11003 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
11004 dwarf2_const_value_length_mismatch_complaint (name
,
11005 cu_header
->addr_size
,
11006 TYPE_LENGTH (type
));
11007 /* Symbols of this form are reasonably rare, so we just
11008 piggyback on the existing location code rather than writing
11009 a new implementation of symbol_computed_ops. */
11010 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
11011 sizeof (struct dwarf2_locexpr_baton
));
11012 (*baton
)->per_cu
= cu
->per_cu
;
11013 gdb_assert ((*baton
)->per_cu
);
11015 (*baton
)->size
= 2 + cu_header
->addr_size
;
11016 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
11017 (*baton
)->data
= data
;
11019 data
[0] = DW_OP_addr
;
11020 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
11021 byte_order
, DW_ADDR (attr
));
11022 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
11025 case DW_FORM_string
:
11027 /* DW_STRING is already allocated on the objfile obstack, point
11029 *bytes
= (gdb_byte
*) DW_STRING (attr
);
11031 case DW_FORM_block1
:
11032 case DW_FORM_block2
:
11033 case DW_FORM_block4
:
11034 case DW_FORM_block
:
11035 case DW_FORM_exprloc
:
11036 blk
= DW_BLOCK (attr
);
11037 if (TYPE_LENGTH (type
) != blk
->size
)
11038 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
11039 TYPE_LENGTH (type
));
11040 *bytes
= blk
->data
;
11043 /* The DW_AT_const_value attributes are supposed to carry the
11044 symbol's value "represented as it would be on the target
11045 architecture." By the time we get here, it's already been
11046 converted to host endianness, so we just need to sign- or
11047 zero-extend it as appropriate. */
11048 case DW_FORM_data1
:
11049 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
11051 case DW_FORM_data2
:
11052 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
11054 case DW_FORM_data4
:
11055 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
11057 case DW_FORM_data8
:
11058 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
11061 case DW_FORM_sdata
:
11062 *value
= DW_SND (attr
);
11065 case DW_FORM_udata
:
11066 *value
= DW_UNSND (attr
);
11070 complaint (&symfile_complaints
,
11071 _("unsupported const value attribute form: '%s'"),
11072 dwarf_form_name (attr
->form
));
11079 /* Copy constant value from an attribute to a symbol. */
11082 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
11083 struct dwarf2_cu
*cu
)
11085 struct objfile
*objfile
= cu
->objfile
;
11086 struct comp_unit_head
*cu_header
= &cu
->header
;
11089 struct dwarf2_locexpr_baton
*baton
;
11091 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11092 SYMBOL_PRINT_NAME (sym
),
11093 &objfile
->objfile_obstack
, cu
,
11094 &value
, &bytes
, &baton
);
11098 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11099 SYMBOL_LOCATION_BATON (sym
) = baton
;
11100 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11102 else if (bytes
!= NULL
)
11104 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11105 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11109 SYMBOL_VALUE (sym
) = value
;
11110 SYMBOL_CLASS (sym
) = LOC_CONST
;
11114 /* Return the type of the die in question using its DW_AT_type attribute. */
11116 static struct type
*
11117 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11119 struct attribute
*type_attr
;
11121 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11124 /* A missing DW_AT_type represents a void type. */
11125 return objfile_type (cu
->objfile
)->builtin_void
;
11128 return lookup_die_type (die
, type_attr
, cu
);
11131 /* True iff CU's producer generates GNAT Ada auxiliary information
11132 that allows to find parallel types through that information instead
11133 of having to do expensive parallel lookups by type name. */
11136 need_gnat_info (struct dwarf2_cu
*cu
)
11138 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11139 of GNAT produces this auxiliary information, without any indication
11140 that it is produced. Part of enhancing the FSF version of GNAT
11141 to produce that information will be to put in place an indicator
11142 that we can use in order to determine whether the descriptive type
11143 info is available or not. One suggestion that has been made is
11144 to use a new attribute, attached to the CU die. For now, assume
11145 that the descriptive type info is not available. */
11149 /* Return the auxiliary type of the die in question using its
11150 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11151 attribute is not present. */
11153 static struct type
*
11154 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11156 struct attribute
*type_attr
;
11158 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11162 return lookup_die_type (die
, type_attr
, cu
);
11165 /* If DIE has a descriptive_type attribute, then set the TYPE's
11166 descriptive type accordingly. */
11169 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11170 struct dwarf2_cu
*cu
)
11172 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11174 if (descriptive_type
)
11176 ALLOCATE_GNAT_AUX_TYPE (type
);
11177 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11181 /* Return the containing type of the die in question using its
11182 DW_AT_containing_type attribute. */
11184 static struct type
*
11185 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11187 struct attribute
*type_attr
;
11189 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11191 error (_("Dwarf Error: Problem turning containing type into gdb type "
11192 "[in module %s]"), cu
->objfile
->name
);
11194 return lookup_die_type (die
, type_attr
, cu
);
11197 /* Look up the type of DIE in CU using its type attribute ATTR.
11198 If there is no type substitute an error marker. */
11200 static struct type
*
11201 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11202 struct dwarf2_cu
*cu
)
11204 struct type
*this_type
;
11206 /* First see if we have it cached. */
11208 if (is_ref_attr (attr
))
11210 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11212 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11214 else if (attr
->form
== DW_FORM_sig8
)
11216 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11217 struct dwarf2_cu
*sig_cu
;
11218 unsigned int offset
;
11220 /* sig_type will be NULL if the signatured type is missing from
11222 if (sig_type
== NULL
)
11223 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11224 "at 0x%x [in module %s]"),
11225 die
->offset
, cu
->objfile
->name
);
11227 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11228 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11229 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11233 dump_die_for_error (die
);
11234 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11235 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11238 /* If not cached we need to read it in. */
11240 if (this_type
== NULL
)
11242 struct die_info
*type_die
;
11243 struct dwarf2_cu
*type_cu
= cu
;
11245 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11246 /* If the type is cached, we should have found it above. */
11247 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11248 this_type
= read_type_die_1 (type_die
, type_cu
);
11251 /* If we still don't have a type use an error marker. */
11253 if (this_type
== NULL
)
11255 char *message
, *saved
;
11257 /* read_type_die already issued a complaint. */
11258 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11262 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11263 message
, strlen (message
));
11266 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11272 /* Return the type in DIE, CU.
11273 Returns NULL for invalid types.
11275 This first does a lookup in the appropriate type_hash table,
11276 and only reads the die in if necessary.
11278 NOTE: This can be called when reading in partial or full symbols. */
11280 static struct type
*
11281 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11283 struct type
*this_type
;
11285 this_type
= get_die_type (die
, cu
);
11289 return read_type_die_1 (die
, cu
);
11292 /* Read the type in DIE, CU.
11293 Returns NULL for invalid types. */
11295 static struct type
*
11296 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11298 struct type
*this_type
= NULL
;
11302 case DW_TAG_class_type
:
11303 case DW_TAG_interface_type
:
11304 case DW_TAG_structure_type
:
11305 case DW_TAG_union_type
:
11306 this_type
= read_structure_type (die
, cu
);
11308 case DW_TAG_enumeration_type
:
11309 this_type
= read_enumeration_type (die
, cu
);
11311 case DW_TAG_subprogram
:
11312 case DW_TAG_subroutine_type
:
11313 case DW_TAG_inlined_subroutine
:
11314 this_type
= read_subroutine_type (die
, cu
);
11316 case DW_TAG_array_type
:
11317 this_type
= read_array_type (die
, cu
);
11319 case DW_TAG_set_type
:
11320 this_type
= read_set_type (die
, cu
);
11322 case DW_TAG_pointer_type
:
11323 this_type
= read_tag_pointer_type (die
, cu
);
11325 case DW_TAG_ptr_to_member_type
:
11326 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11328 case DW_TAG_reference_type
:
11329 this_type
= read_tag_reference_type (die
, cu
);
11331 case DW_TAG_const_type
:
11332 this_type
= read_tag_const_type (die
, cu
);
11334 case DW_TAG_volatile_type
:
11335 this_type
= read_tag_volatile_type (die
, cu
);
11337 case DW_TAG_string_type
:
11338 this_type
= read_tag_string_type (die
, cu
);
11340 case DW_TAG_typedef
:
11341 this_type
= read_typedef (die
, cu
);
11343 case DW_TAG_subrange_type
:
11344 this_type
= read_subrange_type (die
, cu
);
11346 case DW_TAG_base_type
:
11347 this_type
= read_base_type (die
, cu
);
11349 case DW_TAG_unspecified_type
:
11350 this_type
= read_unspecified_type (die
, cu
);
11352 case DW_TAG_namespace
:
11353 this_type
= read_namespace_type (die
, cu
);
11355 case DW_TAG_module
:
11356 this_type
= read_module_type (die
, cu
);
11359 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11360 dwarf_tag_name (die
->tag
));
11367 /* See if we can figure out if the class lives in a namespace. We do
11368 this by looking for a member function; its demangled name will
11369 contain namespace info, if there is any.
11370 Return the computed name or NULL.
11371 Space for the result is allocated on the objfile's obstack.
11372 This is the full-die version of guess_partial_die_structure_name.
11373 In this case we know DIE has no useful parent. */
11376 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11378 struct die_info
*spec_die
;
11379 struct dwarf2_cu
*spec_cu
;
11380 struct die_info
*child
;
11383 spec_die
= die_specification (die
, &spec_cu
);
11384 if (spec_die
!= NULL
)
11390 for (child
= die
->child
;
11392 child
= child
->sibling
)
11394 if (child
->tag
== DW_TAG_subprogram
)
11396 struct attribute
*attr
;
11398 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
11400 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
11404 = language_class_name_from_physname (cu
->language_defn
,
11408 if (actual_name
!= NULL
)
11410 char *die_name
= dwarf2_name (die
, cu
);
11412 if (die_name
!= NULL
11413 && strcmp (die_name
, actual_name
) != 0)
11415 /* Strip off the class name from the full name.
11416 We want the prefix. */
11417 int die_name_len
= strlen (die_name
);
11418 int actual_name_len
= strlen (actual_name
);
11420 /* Test for '::' as a sanity check. */
11421 if (actual_name_len
> die_name_len
+ 2
11422 && actual_name
[actual_name_len
- die_name_len
- 1] == ':')
11424 obsavestring (actual_name
,
11425 actual_name_len
- die_name_len
- 2,
11426 &cu
->objfile
->objfile_obstack
);
11429 xfree (actual_name
);
11438 /* Return the name of the namespace/class that DIE is defined within,
11439 or "" if we can't tell. The caller should not xfree the result.
11441 For example, if we're within the method foo() in the following
11451 then determine_prefix on foo's die will return "N::C". */
11454 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11456 struct die_info
*parent
, *spec_die
;
11457 struct dwarf2_cu
*spec_cu
;
11458 struct type
*parent_type
;
11460 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11461 && cu
->language
!= language_fortran
)
11464 /* We have to be careful in the presence of DW_AT_specification.
11465 For example, with GCC 3.4, given the code
11469 // Definition of N::foo.
11473 then we'll have a tree of DIEs like this:
11475 1: DW_TAG_compile_unit
11476 2: DW_TAG_namespace // N
11477 3: DW_TAG_subprogram // declaration of N::foo
11478 4: DW_TAG_subprogram // definition of N::foo
11479 DW_AT_specification // refers to die #3
11481 Thus, when processing die #4, we have to pretend that we're in
11482 the context of its DW_AT_specification, namely the contex of die
11485 spec_die
= die_specification (die
, &spec_cu
);
11486 if (spec_die
== NULL
)
11487 parent
= die
->parent
;
11490 parent
= spec_die
->parent
;
11494 if (parent
== NULL
)
11496 else if (parent
->building_fullname
)
11499 const char *parent_name
;
11501 /* It has been seen on RealView 2.2 built binaries,
11502 DW_TAG_template_type_param types actually _defined_ as
11503 children of the parent class:
11506 template class <class Enum> Class{};
11507 Class<enum E> class_e;
11509 1: DW_TAG_class_type (Class)
11510 2: DW_TAG_enumeration_type (E)
11511 3: DW_TAG_enumerator (enum1:0)
11512 3: DW_TAG_enumerator (enum2:1)
11514 2: DW_TAG_template_type_param
11515 DW_AT_type DW_FORM_ref_udata (E)
11517 Besides being broken debug info, it can put GDB into an
11518 infinite loop. Consider:
11520 When we're building the full name for Class<E>, we'll start
11521 at Class, and go look over its template type parameters,
11522 finding E. We'll then try to build the full name of E, and
11523 reach here. We're now trying to build the full name of E,
11524 and look over the parent DIE for containing scope. In the
11525 broken case, if we followed the parent DIE of E, we'd again
11526 find Class, and once again go look at its template type
11527 arguments, etc., etc. Simply don't consider such parent die
11528 as source-level parent of this die (it can't be, the language
11529 doesn't allow it), and break the loop here. */
11530 name
= dwarf2_name (die
, cu
);
11531 parent_name
= dwarf2_name (parent
, cu
);
11532 complaint (&symfile_complaints
,
11533 _("template param type '%s' defined within parent '%s'"),
11534 name
? name
: "<unknown>",
11535 parent_name
? parent_name
: "<unknown>");
11539 switch (parent
->tag
)
11541 case DW_TAG_namespace
:
11542 parent_type
= read_type_die (parent
, cu
);
11543 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11544 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11545 Work around this problem here. */
11546 if (cu
->language
== language_cplus
11547 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11549 /* We give a name to even anonymous namespaces. */
11550 return TYPE_TAG_NAME (parent_type
);
11551 case DW_TAG_class_type
:
11552 case DW_TAG_interface_type
:
11553 case DW_TAG_structure_type
:
11554 case DW_TAG_union_type
:
11555 case DW_TAG_module
:
11556 parent_type
= read_type_die (parent
, cu
);
11557 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11558 return TYPE_TAG_NAME (parent_type
);
11560 /* An anonymous structure is only allowed non-static data
11561 members; no typedefs, no member functions, et cetera.
11562 So it does not need a prefix. */
11564 case DW_TAG_compile_unit
:
11565 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11566 if (cu
->language
== language_cplus
11567 && dwarf2_per_objfile
->types
.asection
!= NULL
11568 && die
->child
!= NULL
11569 && (die
->tag
== DW_TAG_class_type
11570 || die
->tag
== DW_TAG_structure_type
11571 || die
->tag
== DW_TAG_union_type
))
11573 char *name
= guess_full_die_structure_name (die
, cu
);
11579 return determine_prefix (parent
, cu
);
11583 /* Return a newly-allocated string formed by concatenating PREFIX and
11584 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11585 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11586 perform an obconcat, otherwise allocate storage for the result. The CU argument
11587 is used to determine the language and hence, the appropriate separator. */
11589 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11592 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11593 int physname
, struct dwarf2_cu
*cu
)
11595 const char *lead
= "";
11598 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11600 else if (cu
->language
== language_java
)
11602 else if (cu
->language
== language_fortran
&& physname
)
11604 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11605 DW_AT_MIPS_linkage_name is preferred and used instead. */
11613 if (prefix
== NULL
)
11615 if (suffix
== NULL
)
11620 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11622 strcpy (retval
, lead
);
11623 strcat (retval
, prefix
);
11624 strcat (retval
, sep
);
11625 strcat (retval
, suffix
);
11630 /* We have an obstack. */
11631 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11635 /* Return sibling of die, NULL if no sibling. */
11637 static struct die_info
*
11638 sibling_die (struct die_info
*die
)
11640 return die
->sibling
;
11643 /* Get name of a die, return NULL if not found. */
11646 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11647 struct obstack
*obstack
)
11649 if (name
&& cu
->language
== language_cplus
)
11651 char *canon_name
= cp_canonicalize_string (name
);
11653 if (canon_name
!= NULL
)
11655 if (strcmp (canon_name
, name
) != 0)
11656 name
= obsavestring (canon_name
, strlen (canon_name
),
11658 xfree (canon_name
);
11665 /* Get name of a die, return NULL if not found. */
11668 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11670 struct attribute
*attr
;
11672 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11673 if (!attr
|| !DW_STRING (attr
))
11678 case DW_TAG_compile_unit
:
11679 /* Compilation units have a DW_AT_name that is a filename, not
11680 a source language identifier. */
11681 case DW_TAG_enumeration_type
:
11682 case DW_TAG_enumerator
:
11683 /* These tags always have simple identifiers already; no need
11684 to canonicalize them. */
11685 return DW_STRING (attr
);
11687 case DW_TAG_subprogram
:
11688 /* Java constructors will all be named "<init>", so return
11689 the class name when we see this special case. */
11690 if (cu
->language
== language_java
11691 && DW_STRING (attr
) != NULL
11692 && strcmp (DW_STRING (attr
), "<init>") == 0)
11694 struct dwarf2_cu
*spec_cu
= cu
;
11695 struct die_info
*spec_die
;
11697 /* GCJ will output '<init>' for Java constructor names.
11698 For this special case, return the name of the parent class. */
11700 /* GCJ may output suprogram DIEs with AT_specification set.
11701 If so, use the name of the specified DIE. */
11702 spec_die
= die_specification (die
, &spec_cu
);
11703 if (spec_die
!= NULL
)
11704 return dwarf2_name (spec_die
, spec_cu
);
11709 if (die
->tag
== DW_TAG_class_type
)
11710 return dwarf2_name (die
, cu
);
11712 while (die
->tag
!= DW_TAG_compile_unit
);
11716 case DW_TAG_class_type
:
11717 case DW_TAG_interface_type
:
11718 case DW_TAG_structure_type
:
11719 case DW_TAG_union_type
:
11720 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11721 structures or unions. These were of the form "._%d" in GCC 4.1,
11722 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11723 and GCC 4.4. We work around this problem by ignoring these. */
11724 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11725 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11733 if (!DW_STRING_IS_CANONICAL (attr
))
11736 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11737 &cu
->objfile
->objfile_obstack
);
11738 DW_STRING_IS_CANONICAL (attr
) = 1;
11740 return DW_STRING (attr
);
11743 /* Return the die that this die in an extension of, or NULL if there
11744 is none. *EXT_CU is the CU containing DIE on input, and the CU
11745 containing the return value on output. */
11747 static struct die_info
*
11748 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11750 struct attribute
*attr
;
11752 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11756 return follow_die_ref (die
, attr
, ext_cu
);
11759 /* Convert a DIE tag into its string name. */
11762 dwarf_tag_name (unsigned tag
)
11766 case DW_TAG_padding
:
11767 return "DW_TAG_padding";
11768 case DW_TAG_array_type
:
11769 return "DW_TAG_array_type";
11770 case DW_TAG_class_type
:
11771 return "DW_TAG_class_type";
11772 case DW_TAG_entry_point
:
11773 return "DW_TAG_entry_point";
11774 case DW_TAG_enumeration_type
:
11775 return "DW_TAG_enumeration_type";
11776 case DW_TAG_formal_parameter
:
11777 return "DW_TAG_formal_parameter";
11778 case DW_TAG_imported_declaration
:
11779 return "DW_TAG_imported_declaration";
11781 return "DW_TAG_label";
11782 case DW_TAG_lexical_block
:
11783 return "DW_TAG_lexical_block";
11784 case DW_TAG_member
:
11785 return "DW_TAG_member";
11786 case DW_TAG_pointer_type
:
11787 return "DW_TAG_pointer_type";
11788 case DW_TAG_reference_type
:
11789 return "DW_TAG_reference_type";
11790 case DW_TAG_compile_unit
:
11791 return "DW_TAG_compile_unit";
11792 case DW_TAG_string_type
:
11793 return "DW_TAG_string_type";
11794 case DW_TAG_structure_type
:
11795 return "DW_TAG_structure_type";
11796 case DW_TAG_subroutine_type
:
11797 return "DW_TAG_subroutine_type";
11798 case DW_TAG_typedef
:
11799 return "DW_TAG_typedef";
11800 case DW_TAG_union_type
:
11801 return "DW_TAG_union_type";
11802 case DW_TAG_unspecified_parameters
:
11803 return "DW_TAG_unspecified_parameters";
11804 case DW_TAG_variant
:
11805 return "DW_TAG_variant";
11806 case DW_TAG_common_block
:
11807 return "DW_TAG_common_block";
11808 case DW_TAG_common_inclusion
:
11809 return "DW_TAG_common_inclusion";
11810 case DW_TAG_inheritance
:
11811 return "DW_TAG_inheritance";
11812 case DW_TAG_inlined_subroutine
:
11813 return "DW_TAG_inlined_subroutine";
11814 case DW_TAG_module
:
11815 return "DW_TAG_module";
11816 case DW_TAG_ptr_to_member_type
:
11817 return "DW_TAG_ptr_to_member_type";
11818 case DW_TAG_set_type
:
11819 return "DW_TAG_set_type";
11820 case DW_TAG_subrange_type
:
11821 return "DW_TAG_subrange_type";
11822 case DW_TAG_with_stmt
:
11823 return "DW_TAG_with_stmt";
11824 case DW_TAG_access_declaration
:
11825 return "DW_TAG_access_declaration";
11826 case DW_TAG_base_type
:
11827 return "DW_TAG_base_type";
11828 case DW_TAG_catch_block
:
11829 return "DW_TAG_catch_block";
11830 case DW_TAG_const_type
:
11831 return "DW_TAG_const_type";
11832 case DW_TAG_constant
:
11833 return "DW_TAG_constant";
11834 case DW_TAG_enumerator
:
11835 return "DW_TAG_enumerator";
11836 case DW_TAG_file_type
:
11837 return "DW_TAG_file_type";
11838 case DW_TAG_friend
:
11839 return "DW_TAG_friend";
11840 case DW_TAG_namelist
:
11841 return "DW_TAG_namelist";
11842 case DW_TAG_namelist_item
:
11843 return "DW_TAG_namelist_item";
11844 case DW_TAG_packed_type
:
11845 return "DW_TAG_packed_type";
11846 case DW_TAG_subprogram
:
11847 return "DW_TAG_subprogram";
11848 case DW_TAG_template_type_param
:
11849 return "DW_TAG_template_type_param";
11850 case DW_TAG_template_value_param
:
11851 return "DW_TAG_template_value_param";
11852 case DW_TAG_thrown_type
:
11853 return "DW_TAG_thrown_type";
11854 case DW_TAG_try_block
:
11855 return "DW_TAG_try_block";
11856 case DW_TAG_variant_part
:
11857 return "DW_TAG_variant_part";
11858 case DW_TAG_variable
:
11859 return "DW_TAG_variable";
11860 case DW_TAG_volatile_type
:
11861 return "DW_TAG_volatile_type";
11862 case DW_TAG_dwarf_procedure
:
11863 return "DW_TAG_dwarf_procedure";
11864 case DW_TAG_restrict_type
:
11865 return "DW_TAG_restrict_type";
11866 case DW_TAG_interface_type
:
11867 return "DW_TAG_interface_type";
11868 case DW_TAG_namespace
:
11869 return "DW_TAG_namespace";
11870 case DW_TAG_imported_module
:
11871 return "DW_TAG_imported_module";
11872 case DW_TAG_unspecified_type
:
11873 return "DW_TAG_unspecified_type";
11874 case DW_TAG_partial_unit
:
11875 return "DW_TAG_partial_unit";
11876 case DW_TAG_imported_unit
:
11877 return "DW_TAG_imported_unit";
11878 case DW_TAG_condition
:
11879 return "DW_TAG_condition";
11880 case DW_TAG_shared_type
:
11881 return "DW_TAG_shared_type";
11882 case DW_TAG_type_unit
:
11883 return "DW_TAG_type_unit";
11884 case DW_TAG_MIPS_loop
:
11885 return "DW_TAG_MIPS_loop";
11886 case DW_TAG_HP_array_descriptor
:
11887 return "DW_TAG_HP_array_descriptor";
11888 case DW_TAG_format_label
:
11889 return "DW_TAG_format_label";
11890 case DW_TAG_function_template
:
11891 return "DW_TAG_function_template";
11892 case DW_TAG_class_template
:
11893 return "DW_TAG_class_template";
11894 case DW_TAG_GNU_BINCL
:
11895 return "DW_TAG_GNU_BINCL";
11896 case DW_TAG_GNU_EINCL
:
11897 return "DW_TAG_GNU_EINCL";
11898 case DW_TAG_upc_shared_type
:
11899 return "DW_TAG_upc_shared_type";
11900 case DW_TAG_upc_strict_type
:
11901 return "DW_TAG_upc_strict_type";
11902 case DW_TAG_upc_relaxed_type
:
11903 return "DW_TAG_upc_relaxed_type";
11904 case DW_TAG_PGI_kanji_type
:
11905 return "DW_TAG_PGI_kanji_type";
11906 case DW_TAG_PGI_interface_block
:
11907 return "DW_TAG_PGI_interface_block";
11909 return "DW_TAG_<unknown>";
11913 /* Convert a DWARF attribute code into its string name. */
11916 dwarf_attr_name (unsigned attr
)
11920 case DW_AT_sibling
:
11921 return "DW_AT_sibling";
11922 case DW_AT_location
:
11923 return "DW_AT_location";
11925 return "DW_AT_name";
11926 case DW_AT_ordering
:
11927 return "DW_AT_ordering";
11928 case DW_AT_subscr_data
:
11929 return "DW_AT_subscr_data";
11930 case DW_AT_byte_size
:
11931 return "DW_AT_byte_size";
11932 case DW_AT_bit_offset
:
11933 return "DW_AT_bit_offset";
11934 case DW_AT_bit_size
:
11935 return "DW_AT_bit_size";
11936 case DW_AT_element_list
:
11937 return "DW_AT_element_list";
11938 case DW_AT_stmt_list
:
11939 return "DW_AT_stmt_list";
11941 return "DW_AT_low_pc";
11942 case DW_AT_high_pc
:
11943 return "DW_AT_high_pc";
11944 case DW_AT_language
:
11945 return "DW_AT_language";
11947 return "DW_AT_member";
11949 return "DW_AT_discr";
11950 case DW_AT_discr_value
:
11951 return "DW_AT_discr_value";
11952 case DW_AT_visibility
:
11953 return "DW_AT_visibility";
11955 return "DW_AT_import";
11956 case DW_AT_string_length
:
11957 return "DW_AT_string_length";
11958 case DW_AT_common_reference
:
11959 return "DW_AT_common_reference";
11960 case DW_AT_comp_dir
:
11961 return "DW_AT_comp_dir";
11962 case DW_AT_const_value
:
11963 return "DW_AT_const_value";
11964 case DW_AT_containing_type
:
11965 return "DW_AT_containing_type";
11966 case DW_AT_default_value
:
11967 return "DW_AT_default_value";
11969 return "DW_AT_inline";
11970 case DW_AT_is_optional
:
11971 return "DW_AT_is_optional";
11972 case DW_AT_lower_bound
:
11973 return "DW_AT_lower_bound";
11974 case DW_AT_producer
:
11975 return "DW_AT_producer";
11976 case DW_AT_prototyped
:
11977 return "DW_AT_prototyped";
11978 case DW_AT_return_addr
:
11979 return "DW_AT_return_addr";
11980 case DW_AT_start_scope
:
11981 return "DW_AT_start_scope";
11982 case DW_AT_bit_stride
:
11983 return "DW_AT_bit_stride";
11984 case DW_AT_upper_bound
:
11985 return "DW_AT_upper_bound";
11986 case DW_AT_abstract_origin
:
11987 return "DW_AT_abstract_origin";
11988 case DW_AT_accessibility
:
11989 return "DW_AT_accessibility";
11990 case DW_AT_address_class
:
11991 return "DW_AT_address_class";
11992 case DW_AT_artificial
:
11993 return "DW_AT_artificial";
11994 case DW_AT_base_types
:
11995 return "DW_AT_base_types";
11996 case DW_AT_calling_convention
:
11997 return "DW_AT_calling_convention";
11999 return "DW_AT_count";
12000 case DW_AT_data_member_location
:
12001 return "DW_AT_data_member_location";
12002 case DW_AT_decl_column
:
12003 return "DW_AT_decl_column";
12004 case DW_AT_decl_file
:
12005 return "DW_AT_decl_file";
12006 case DW_AT_decl_line
:
12007 return "DW_AT_decl_line";
12008 case DW_AT_declaration
:
12009 return "DW_AT_declaration";
12010 case DW_AT_discr_list
:
12011 return "DW_AT_discr_list";
12012 case DW_AT_encoding
:
12013 return "DW_AT_encoding";
12014 case DW_AT_external
:
12015 return "DW_AT_external";
12016 case DW_AT_frame_base
:
12017 return "DW_AT_frame_base";
12019 return "DW_AT_friend";
12020 case DW_AT_identifier_case
:
12021 return "DW_AT_identifier_case";
12022 case DW_AT_macro_info
:
12023 return "DW_AT_macro_info";
12024 case DW_AT_namelist_items
:
12025 return "DW_AT_namelist_items";
12026 case DW_AT_priority
:
12027 return "DW_AT_priority";
12028 case DW_AT_segment
:
12029 return "DW_AT_segment";
12030 case DW_AT_specification
:
12031 return "DW_AT_specification";
12032 case DW_AT_static_link
:
12033 return "DW_AT_static_link";
12035 return "DW_AT_type";
12036 case DW_AT_use_location
:
12037 return "DW_AT_use_location";
12038 case DW_AT_variable_parameter
:
12039 return "DW_AT_variable_parameter";
12040 case DW_AT_virtuality
:
12041 return "DW_AT_virtuality";
12042 case DW_AT_vtable_elem_location
:
12043 return "DW_AT_vtable_elem_location";
12044 /* DWARF 3 values. */
12045 case DW_AT_allocated
:
12046 return "DW_AT_allocated";
12047 case DW_AT_associated
:
12048 return "DW_AT_associated";
12049 case DW_AT_data_location
:
12050 return "DW_AT_data_location";
12051 case DW_AT_byte_stride
:
12052 return "DW_AT_byte_stride";
12053 case DW_AT_entry_pc
:
12054 return "DW_AT_entry_pc";
12055 case DW_AT_use_UTF8
:
12056 return "DW_AT_use_UTF8";
12057 case DW_AT_extension
:
12058 return "DW_AT_extension";
12060 return "DW_AT_ranges";
12061 case DW_AT_trampoline
:
12062 return "DW_AT_trampoline";
12063 case DW_AT_call_column
:
12064 return "DW_AT_call_column";
12065 case DW_AT_call_file
:
12066 return "DW_AT_call_file";
12067 case DW_AT_call_line
:
12068 return "DW_AT_call_line";
12069 case DW_AT_description
:
12070 return "DW_AT_description";
12071 case DW_AT_binary_scale
:
12072 return "DW_AT_binary_scale";
12073 case DW_AT_decimal_scale
:
12074 return "DW_AT_decimal_scale";
12076 return "DW_AT_small";
12077 case DW_AT_decimal_sign
:
12078 return "DW_AT_decimal_sign";
12079 case DW_AT_digit_count
:
12080 return "DW_AT_digit_count";
12081 case DW_AT_picture_string
:
12082 return "DW_AT_picture_string";
12083 case DW_AT_mutable
:
12084 return "DW_AT_mutable";
12085 case DW_AT_threads_scaled
:
12086 return "DW_AT_threads_scaled";
12087 case DW_AT_explicit
:
12088 return "DW_AT_explicit";
12089 case DW_AT_object_pointer
:
12090 return "DW_AT_object_pointer";
12091 case DW_AT_endianity
:
12092 return "DW_AT_endianity";
12093 case DW_AT_elemental
:
12094 return "DW_AT_elemental";
12096 return "DW_AT_pure";
12097 case DW_AT_recursive
:
12098 return "DW_AT_recursive";
12099 /* DWARF 4 values. */
12100 case DW_AT_signature
:
12101 return "DW_AT_signature";
12102 case DW_AT_linkage_name
:
12103 return "DW_AT_linkage_name";
12104 /* SGI/MIPS extensions. */
12105 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12106 case DW_AT_MIPS_fde
:
12107 return "DW_AT_MIPS_fde";
12109 case DW_AT_MIPS_loop_begin
:
12110 return "DW_AT_MIPS_loop_begin";
12111 case DW_AT_MIPS_tail_loop_begin
:
12112 return "DW_AT_MIPS_tail_loop_begin";
12113 case DW_AT_MIPS_epilog_begin
:
12114 return "DW_AT_MIPS_epilog_begin";
12115 case DW_AT_MIPS_loop_unroll_factor
:
12116 return "DW_AT_MIPS_loop_unroll_factor";
12117 case DW_AT_MIPS_software_pipeline_depth
:
12118 return "DW_AT_MIPS_software_pipeline_depth";
12119 case DW_AT_MIPS_linkage_name
:
12120 return "DW_AT_MIPS_linkage_name";
12121 case DW_AT_MIPS_stride
:
12122 return "DW_AT_MIPS_stride";
12123 case DW_AT_MIPS_abstract_name
:
12124 return "DW_AT_MIPS_abstract_name";
12125 case DW_AT_MIPS_clone_origin
:
12126 return "DW_AT_MIPS_clone_origin";
12127 case DW_AT_MIPS_has_inlines
:
12128 return "DW_AT_MIPS_has_inlines";
12129 /* HP extensions. */
12130 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12131 case DW_AT_HP_block_index
:
12132 return "DW_AT_HP_block_index";
12134 case DW_AT_HP_unmodifiable
:
12135 return "DW_AT_HP_unmodifiable";
12136 case DW_AT_HP_actuals_stmt_list
:
12137 return "DW_AT_HP_actuals_stmt_list";
12138 case DW_AT_HP_proc_per_section
:
12139 return "DW_AT_HP_proc_per_section";
12140 case DW_AT_HP_raw_data_ptr
:
12141 return "DW_AT_HP_raw_data_ptr";
12142 case DW_AT_HP_pass_by_reference
:
12143 return "DW_AT_HP_pass_by_reference";
12144 case DW_AT_HP_opt_level
:
12145 return "DW_AT_HP_opt_level";
12146 case DW_AT_HP_prof_version_id
:
12147 return "DW_AT_HP_prof_version_id";
12148 case DW_AT_HP_opt_flags
:
12149 return "DW_AT_HP_opt_flags";
12150 case DW_AT_HP_cold_region_low_pc
:
12151 return "DW_AT_HP_cold_region_low_pc";
12152 case DW_AT_HP_cold_region_high_pc
:
12153 return "DW_AT_HP_cold_region_high_pc";
12154 case DW_AT_HP_all_variables_modifiable
:
12155 return "DW_AT_HP_all_variables_modifiable";
12156 case DW_AT_HP_linkage_name
:
12157 return "DW_AT_HP_linkage_name";
12158 case DW_AT_HP_prof_flags
:
12159 return "DW_AT_HP_prof_flags";
12160 /* GNU extensions. */
12161 case DW_AT_sf_names
:
12162 return "DW_AT_sf_names";
12163 case DW_AT_src_info
:
12164 return "DW_AT_src_info";
12165 case DW_AT_mac_info
:
12166 return "DW_AT_mac_info";
12167 case DW_AT_src_coords
:
12168 return "DW_AT_src_coords";
12169 case DW_AT_body_begin
:
12170 return "DW_AT_body_begin";
12171 case DW_AT_body_end
:
12172 return "DW_AT_body_end";
12173 case DW_AT_GNU_vector
:
12174 return "DW_AT_GNU_vector";
12175 case DW_AT_GNU_odr_signature
:
12176 return "DW_AT_GNU_odr_signature";
12177 /* VMS extensions. */
12178 case DW_AT_VMS_rtnbeg_pd_address
:
12179 return "DW_AT_VMS_rtnbeg_pd_address";
12180 /* UPC extension. */
12181 case DW_AT_upc_threads_scaled
:
12182 return "DW_AT_upc_threads_scaled";
12183 /* PGI (STMicroelectronics) extensions. */
12184 case DW_AT_PGI_lbase
:
12185 return "DW_AT_PGI_lbase";
12186 case DW_AT_PGI_soffset
:
12187 return "DW_AT_PGI_soffset";
12188 case DW_AT_PGI_lstride
:
12189 return "DW_AT_PGI_lstride";
12191 return "DW_AT_<unknown>";
12195 /* Convert a DWARF value form code into its string name. */
12198 dwarf_form_name (unsigned form
)
12203 return "DW_FORM_addr";
12204 case DW_FORM_block2
:
12205 return "DW_FORM_block2";
12206 case DW_FORM_block4
:
12207 return "DW_FORM_block4";
12208 case DW_FORM_data2
:
12209 return "DW_FORM_data2";
12210 case DW_FORM_data4
:
12211 return "DW_FORM_data4";
12212 case DW_FORM_data8
:
12213 return "DW_FORM_data8";
12214 case DW_FORM_string
:
12215 return "DW_FORM_string";
12216 case DW_FORM_block
:
12217 return "DW_FORM_block";
12218 case DW_FORM_block1
:
12219 return "DW_FORM_block1";
12220 case DW_FORM_data1
:
12221 return "DW_FORM_data1";
12223 return "DW_FORM_flag";
12224 case DW_FORM_sdata
:
12225 return "DW_FORM_sdata";
12227 return "DW_FORM_strp";
12228 case DW_FORM_udata
:
12229 return "DW_FORM_udata";
12230 case DW_FORM_ref_addr
:
12231 return "DW_FORM_ref_addr";
12233 return "DW_FORM_ref1";
12235 return "DW_FORM_ref2";
12237 return "DW_FORM_ref4";
12239 return "DW_FORM_ref8";
12240 case DW_FORM_ref_udata
:
12241 return "DW_FORM_ref_udata";
12242 case DW_FORM_indirect
:
12243 return "DW_FORM_indirect";
12244 case DW_FORM_sec_offset
:
12245 return "DW_FORM_sec_offset";
12246 case DW_FORM_exprloc
:
12247 return "DW_FORM_exprloc";
12248 case DW_FORM_flag_present
:
12249 return "DW_FORM_flag_present";
12251 return "DW_FORM_sig8";
12253 return "DW_FORM_<unknown>";
12257 /* Convert a DWARF stack opcode into its string name. */
12260 dwarf_stack_op_name (unsigned op
, int def
)
12265 return "DW_OP_addr";
12267 return "DW_OP_deref";
12268 case DW_OP_const1u
:
12269 return "DW_OP_const1u";
12270 case DW_OP_const1s
:
12271 return "DW_OP_const1s";
12272 case DW_OP_const2u
:
12273 return "DW_OP_const2u";
12274 case DW_OP_const2s
:
12275 return "DW_OP_const2s";
12276 case DW_OP_const4u
:
12277 return "DW_OP_const4u";
12278 case DW_OP_const4s
:
12279 return "DW_OP_const4s";
12280 case DW_OP_const8u
:
12281 return "DW_OP_const8u";
12282 case DW_OP_const8s
:
12283 return "DW_OP_const8s";
12285 return "DW_OP_constu";
12287 return "DW_OP_consts";
12289 return "DW_OP_dup";
12291 return "DW_OP_drop";
12293 return "DW_OP_over";
12295 return "DW_OP_pick";
12297 return "DW_OP_swap";
12299 return "DW_OP_rot";
12301 return "DW_OP_xderef";
12303 return "DW_OP_abs";
12305 return "DW_OP_and";
12307 return "DW_OP_div";
12309 return "DW_OP_minus";
12311 return "DW_OP_mod";
12313 return "DW_OP_mul";
12315 return "DW_OP_neg";
12317 return "DW_OP_not";
12321 return "DW_OP_plus";
12322 case DW_OP_plus_uconst
:
12323 return "DW_OP_plus_uconst";
12325 return "DW_OP_shl";
12327 return "DW_OP_shr";
12329 return "DW_OP_shra";
12331 return "DW_OP_xor";
12333 return "DW_OP_bra";
12347 return "DW_OP_skip";
12349 return "DW_OP_lit0";
12351 return "DW_OP_lit1";
12353 return "DW_OP_lit2";
12355 return "DW_OP_lit3";
12357 return "DW_OP_lit4";
12359 return "DW_OP_lit5";
12361 return "DW_OP_lit6";
12363 return "DW_OP_lit7";
12365 return "DW_OP_lit8";
12367 return "DW_OP_lit9";
12369 return "DW_OP_lit10";
12371 return "DW_OP_lit11";
12373 return "DW_OP_lit12";
12375 return "DW_OP_lit13";
12377 return "DW_OP_lit14";
12379 return "DW_OP_lit15";
12381 return "DW_OP_lit16";
12383 return "DW_OP_lit17";
12385 return "DW_OP_lit18";
12387 return "DW_OP_lit19";
12389 return "DW_OP_lit20";
12391 return "DW_OP_lit21";
12393 return "DW_OP_lit22";
12395 return "DW_OP_lit23";
12397 return "DW_OP_lit24";
12399 return "DW_OP_lit25";
12401 return "DW_OP_lit26";
12403 return "DW_OP_lit27";
12405 return "DW_OP_lit28";
12407 return "DW_OP_lit29";
12409 return "DW_OP_lit30";
12411 return "DW_OP_lit31";
12413 return "DW_OP_reg0";
12415 return "DW_OP_reg1";
12417 return "DW_OP_reg2";
12419 return "DW_OP_reg3";
12421 return "DW_OP_reg4";
12423 return "DW_OP_reg5";
12425 return "DW_OP_reg6";
12427 return "DW_OP_reg7";
12429 return "DW_OP_reg8";
12431 return "DW_OP_reg9";
12433 return "DW_OP_reg10";
12435 return "DW_OP_reg11";
12437 return "DW_OP_reg12";
12439 return "DW_OP_reg13";
12441 return "DW_OP_reg14";
12443 return "DW_OP_reg15";
12445 return "DW_OP_reg16";
12447 return "DW_OP_reg17";
12449 return "DW_OP_reg18";
12451 return "DW_OP_reg19";
12453 return "DW_OP_reg20";
12455 return "DW_OP_reg21";
12457 return "DW_OP_reg22";
12459 return "DW_OP_reg23";
12461 return "DW_OP_reg24";
12463 return "DW_OP_reg25";
12465 return "DW_OP_reg26";
12467 return "DW_OP_reg27";
12469 return "DW_OP_reg28";
12471 return "DW_OP_reg29";
12473 return "DW_OP_reg30";
12475 return "DW_OP_reg31";
12477 return "DW_OP_breg0";
12479 return "DW_OP_breg1";
12481 return "DW_OP_breg2";
12483 return "DW_OP_breg3";
12485 return "DW_OP_breg4";
12487 return "DW_OP_breg5";
12489 return "DW_OP_breg6";
12491 return "DW_OP_breg7";
12493 return "DW_OP_breg8";
12495 return "DW_OP_breg9";
12497 return "DW_OP_breg10";
12499 return "DW_OP_breg11";
12501 return "DW_OP_breg12";
12503 return "DW_OP_breg13";
12505 return "DW_OP_breg14";
12507 return "DW_OP_breg15";
12509 return "DW_OP_breg16";
12511 return "DW_OP_breg17";
12513 return "DW_OP_breg18";
12515 return "DW_OP_breg19";
12517 return "DW_OP_breg20";
12519 return "DW_OP_breg21";
12521 return "DW_OP_breg22";
12523 return "DW_OP_breg23";
12525 return "DW_OP_breg24";
12527 return "DW_OP_breg25";
12529 return "DW_OP_breg26";
12531 return "DW_OP_breg27";
12533 return "DW_OP_breg28";
12535 return "DW_OP_breg29";
12537 return "DW_OP_breg30";
12539 return "DW_OP_breg31";
12541 return "DW_OP_regx";
12543 return "DW_OP_fbreg";
12545 return "DW_OP_bregx";
12547 return "DW_OP_piece";
12548 case DW_OP_deref_size
:
12549 return "DW_OP_deref_size";
12550 case DW_OP_xderef_size
:
12551 return "DW_OP_xderef_size";
12553 return "DW_OP_nop";
12554 /* DWARF 3 extensions. */
12555 case DW_OP_push_object_address
:
12556 return "DW_OP_push_object_address";
12558 return "DW_OP_call2";
12560 return "DW_OP_call4";
12561 case DW_OP_call_ref
:
12562 return "DW_OP_call_ref";
12563 case DW_OP_form_tls_address
:
12564 return "DW_OP_form_tls_address";
12565 case DW_OP_call_frame_cfa
:
12566 return "DW_OP_call_frame_cfa";
12567 case DW_OP_bit_piece
:
12568 return "DW_OP_bit_piece";
12569 /* DWARF 4 extensions. */
12570 case DW_OP_implicit_value
:
12571 return "DW_OP_implicit_value";
12572 case DW_OP_stack_value
:
12573 return "DW_OP_stack_value";
12574 /* GNU extensions. */
12575 case DW_OP_GNU_push_tls_address
:
12576 return "DW_OP_GNU_push_tls_address";
12577 case DW_OP_GNU_uninit
:
12578 return "DW_OP_GNU_uninit";
12579 case DW_OP_GNU_implicit_pointer
:
12580 return "DW_OP_GNU_implicit_pointer";
12582 return def
? "OP_<unknown>" : NULL
;
12587 dwarf_bool_name (unsigned mybool
)
12595 /* Convert a DWARF type code into its string name. */
12598 dwarf_type_encoding_name (unsigned enc
)
12603 return "DW_ATE_void";
12604 case DW_ATE_address
:
12605 return "DW_ATE_address";
12606 case DW_ATE_boolean
:
12607 return "DW_ATE_boolean";
12608 case DW_ATE_complex_float
:
12609 return "DW_ATE_complex_float";
12611 return "DW_ATE_float";
12612 case DW_ATE_signed
:
12613 return "DW_ATE_signed";
12614 case DW_ATE_signed_char
:
12615 return "DW_ATE_signed_char";
12616 case DW_ATE_unsigned
:
12617 return "DW_ATE_unsigned";
12618 case DW_ATE_unsigned_char
:
12619 return "DW_ATE_unsigned_char";
12621 case DW_ATE_imaginary_float
:
12622 return "DW_ATE_imaginary_float";
12623 case DW_ATE_packed_decimal
:
12624 return "DW_ATE_packed_decimal";
12625 case DW_ATE_numeric_string
:
12626 return "DW_ATE_numeric_string";
12627 case DW_ATE_edited
:
12628 return "DW_ATE_edited";
12629 case DW_ATE_signed_fixed
:
12630 return "DW_ATE_signed_fixed";
12631 case DW_ATE_unsigned_fixed
:
12632 return "DW_ATE_unsigned_fixed";
12633 case DW_ATE_decimal_float
:
12634 return "DW_ATE_decimal_float";
12637 return "DW_ATE_UTF";
12638 /* HP extensions. */
12639 case DW_ATE_HP_float80
:
12640 return "DW_ATE_HP_float80";
12641 case DW_ATE_HP_complex_float80
:
12642 return "DW_ATE_HP_complex_float80";
12643 case DW_ATE_HP_float128
:
12644 return "DW_ATE_HP_float128";
12645 case DW_ATE_HP_complex_float128
:
12646 return "DW_ATE_HP_complex_float128";
12647 case DW_ATE_HP_floathpintel
:
12648 return "DW_ATE_HP_floathpintel";
12649 case DW_ATE_HP_imaginary_float80
:
12650 return "DW_ATE_HP_imaginary_float80";
12651 case DW_ATE_HP_imaginary_float128
:
12652 return "DW_ATE_HP_imaginary_float128";
12654 return "DW_ATE_<unknown>";
12658 /* Convert a DWARF call frame info operation to its string name. */
12662 dwarf_cfi_name (unsigned cfi_opc
)
12666 case DW_CFA_advance_loc
:
12667 return "DW_CFA_advance_loc";
12668 case DW_CFA_offset
:
12669 return "DW_CFA_offset";
12670 case DW_CFA_restore
:
12671 return "DW_CFA_restore";
12673 return "DW_CFA_nop";
12674 case DW_CFA_set_loc
:
12675 return "DW_CFA_set_loc";
12676 case DW_CFA_advance_loc1
:
12677 return "DW_CFA_advance_loc1";
12678 case DW_CFA_advance_loc2
:
12679 return "DW_CFA_advance_loc2";
12680 case DW_CFA_advance_loc4
:
12681 return "DW_CFA_advance_loc4";
12682 case DW_CFA_offset_extended
:
12683 return "DW_CFA_offset_extended";
12684 case DW_CFA_restore_extended
:
12685 return "DW_CFA_restore_extended";
12686 case DW_CFA_undefined
:
12687 return "DW_CFA_undefined";
12688 case DW_CFA_same_value
:
12689 return "DW_CFA_same_value";
12690 case DW_CFA_register
:
12691 return "DW_CFA_register";
12692 case DW_CFA_remember_state
:
12693 return "DW_CFA_remember_state";
12694 case DW_CFA_restore_state
:
12695 return "DW_CFA_restore_state";
12696 case DW_CFA_def_cfa
:
12697 return "DW_CFA_def_cfa";
12698 case DW_CFA_def_cfa_register
:
12699 return "DW_CFA_def_cfa_register";
12700 case DW_CFA_def_cfa_offset
:
12701 return "DW_CFA_def_cfa_offset";
12703 case DW_CFA_def_cfa_expression
:
12704 return "DW_CFA_def_cfa_expression";
12705 case DW_CFA_expression
:
12706 return "DW_CFA_expression";
12707 case DW_CFA_offset_extended_sf
:
12708 return "DW_CFA_offset_extended_sf";
12709 case DW_CFA_def_cfa_sf
:
12710 return "DW_CFA_def_cfa_sf";
12711 case DW_CFA_def_cfa_offset_sf
:
12712 return "DW_CFA_def_cfa_offset_sf";
12713 case DW_CFA_val_offset
:
12714 return "DW_CFA_val_offset";
12715 case DW_CFA_val_offset_sf
:
12716 return "DW_CFA_val_offset_sf";
12717 case DW_CFA_val_expression
:
12718 return "DW_CFA_val_expression";
12719 /* SGI/MIPS specific. */
12720 case DW_CFA_MIPS_advance_loc8
:
12721 return "DW_CFA_MIPS_advance_loc8";
12722 /* GNU extensions. */
12723 case DW_CFA_GNU_window_save
:
12724 return "DW_CFA_GNU_window_save";
12725 case DW_CFA_GNU_args_size
:
12726 return "DW_CFA_GNU_args_size";
12727 case DW_CFA_GNU_negative_offset_extended
:
12728 return "DW_CFA_GNU_negative_offset_extended";
12730 return "DW_CFA_<unknown>";
12736 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12740 print_spaces (indent
, f
);
12741 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12742 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12744 if (die
->parent
!= NULL
)
12746 print_spaces (indent
, f
);
12747 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12748 die
->parent
->offset
);
12751 print_spaces (indent
, f
);
12752 fprintf_unfiltered (f
, " has children: %s\n",
12753 dwarf_bool_name (die
->child
!= NULL
));
12755 print_spaces (indent
, f
);
12756 fprintf_unfiltered (f
, " attributes:\n");
12758 for (i
= 0; i
< die
->num_attrs
; ++i
)
12760 print_spaces (indent
, f
);
12761 fprintf_unfiltered (f
, " %s (%s) ",
12762 dwarf_attr_name (die
->attrs
[i
].name
),
12763 dwarf_form_name (die
->attrs
[i
].form
));
12765 switch (die
->attrs
[i
].form
)
12767 case DW_FORM_ref_addr
:
12769 fprintf_unfiltered (f
, "address: ");
12770 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12772 case DW_FORM_block2
:
12773 case DW_FORM_block4
:
12774 case DW_FORM_block
:
12775 case DW_FORM_block1
:
12776 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12778 case DW_FORM_exprloc
:
12779 fprintf_unfiltered (f
, "expression: size %u",
12780 DW_BLOCK (&die
->attrs
[i
])->size
);
12785 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12786 (long) (DW_ADDR (&die
->attrs
[i
])));
12788 case DW_FORM_data1
:
12789 case DW_FORM_data2
:
12790 case DW_FORM_data4
:
12791 case DW_FORM_data8
:
12792 case DW_FORM_udata
:
12793 case DW_FORM_sdata
:
12794 fprintf_unfiltered (f
, "constant: %s",
12795 pulongest (DW_UNSND (&die
->attrs
[i
])));
12797 case DW_FORM_sec_offset
:
12798 fprintf_unfiltered (f
, "section offset: %s",
12799 pulongest (DW_UNSND (&die
->attrs
[i
])));
12802 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12803 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12804 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12806 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12808 case DW_FORM_string
:
12810 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12811 DW_STRING (&die
->attrs
[i
])
12812 ? DW_STRING (&die
->attrs
[i
]) : "",
12813 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12816 if (DW_UNSND (&die
->attrs
[i
]))
12817 fprintf_unfiltered (f
, "flag: TRUE");
12819 fprintf_unfiltered (f
, "flag: FALSE");
12821 case DW_FORM_flag_present
:
12822 fprintf_unfiltered (f
, "flag: TRUE");
12824 case DW_FORM_indirect
:
12825 /* the reader will have reduced the indirect form to
12826 the "base form" so this form should not occur */
12827 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12830 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12831 die
->attrs
[i
].form
);
12834 fprintf_unfiltered (f
, "\n");
12839 dump_die_for_error (struct die_info
*die
)
12841 dump_die_shallow (gdb_stderr
, 0, die
);
12845 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12847 int indent
= level
* 4;
12849 gdb_assert (die
!= NULL
);
12851 if (level
>= max_level
)
12854 dump_die_shallow (f
, indent
, die
);
12856 if (die
->child
!= NULL
)
12858 print_spaces (indent
, f
);
12859 fprintf_unfiltered (f
, " Children:");
12860 if (level
+ 1 < max_level
)
12862 fprintf_unfiltered (f
, "\n");
12863 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12867 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12871 if (die
->sibling
!= NULL
&& level
> 0)
12873 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12877 /* This is called from the pdie macro in gdbinit.in.
12878 It's not static so gcc will keep a copy callable from gdb. */
12881 dump_die (struct die_info
*die
, int max_level
)
12883 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12887 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12891 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12897 is_ref_attr (struct attribute
*attr
)
12899 switch (attr
->form
)
12901 case DW_FORM_ref_addr
:
12906 case DW_FORM_ref_udata
:
12913 static unsigned int
12914 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12916 if (is_ref_attr (attr
))
12917 return DW_ADDR (attr
);
12919 complaint (&symfile_complaints
,
12920 _("unsupported die ref attribute form: '%s'"),
12921 dwarf_form_name (attr
->form
));
12925 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12926 * the value held by the attribute is not constant. */
12929 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12931 if (attr
->form
== DW_FORM_sdata
)
12932 return DW_SND (attr
);
12933 else if (attr
->form
== DW_FORM_udata
12934 || attr
->form
== DW_FORM_data1
12935 || attr
->form
== DW_FORM_data2
12936 || attr
->form
== DW_FORM_data4
12937 || attr
->form
== DW_FORM_data8
)
12938 return DW_UNSND (attr
);
12941 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12942 dwarf_form_name (attr
->form
));
12943 return default_value
;
12947 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12948 unit and add it to our queue.
12949 The result is non-zero if PER_CU was queued, otherwise the result is zero
12950 meaning either PER_CU is already queued or it is already loaded. */
12953 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12954 struct dwarf2_per_cu_data
*per_cu
)
12956 /* We may arrive here during partial symbol reading, if we need full
12957 DIEs to process an unusual case (e.g. template arguments). Do
12958 not queue PER_CU, just tell our caller to load its DIEs. */
12959 if (dwarf2_per_objfile
->reading_partial_symbols
)
12961 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12966 /* Mark the dependence relation so that we don't flush PER_CU
12968 dwarf2_add_dependence (this_cu
, per_cu
);
12970 /* If it's already on the queue, we have nothing to do. */
12971 if (per_cu
->queued
)
12974 /* If the compilation unit is already loaded, just mark it as
12976 if (per_cu
->cu
!= NULL
)
12978 per_cu
->cu
->last_used
= 0;
12982 /* Add it to the queue. */
12983 queue_comp_unit (per_cu
, this_cu
->objfile
);
12988 /* Follow reference or signature attribute ATTR of SRC_DIE.
12989 On entry *REF_CU is the CU of SRC_DIE.
12990 On exit *REF_CU is the CU of the result. */
12992 static struct die_info
*
12993 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12994 struct dwarf2_cu
**ref_cu
)
12996 struct die_info
*die
;
12998 if (is_ref_attr (attr
))
12999 die
= follow_die_ref (src_die
, attr
, ref_cu
);
13000 else if (attr
->form
== DW_FORM_sig8
)
13001 die
= follow_die_sig (src_die
, attr
, ref_cu
);
13004 dump_die_for_error (src_die
);
13005 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13006 (*ref_cu
)->objfile
->name
);
13012 /* Follow reference OFFSET.
13013 On entry *REF_CU is the CU of the source die referencing OFFSET.
13014 On exit *REF_CU is the CU of the result.
13015 Returns NULL if OFFSET is invalid. */
13017 static struct die_info
*
13018 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
13020 struct die_info temp_die
;
13021 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
13023 gdb_assert (cu
->per_cu
!= NULL
);
13027 if (cu
->per_cu
->from_debug_types
)
13029 /* .debug_types CUs cannot reference anything outside their CU.
13030 If they need to, they have to reference a signatured type via
13032 if (! offset_in_cu_p (&cu
->header
, offset
))
13035 else if (! offset_in_cu_p (&cu
->header
, offset
))
13037 struct dwarf2_per_cu_data
*per_cu
;
13039 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
13041 /* If necessary, add it to the queue and load its DIEs. */
13042 if (maybe_queue_comp_unit (cu
, per_cu
))
13043 load_full_comp_unit (per_cu
, cu
->objfile
);
13045 target_cu
= per_cu
->cu
;
13047 else if (cu
->dies
== NULL
)
13049 /* We're loading full DIEs during partial symbol reading. */
13050 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
13051 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
13054 *ref_cu
= target_cu
;
13055 temp_die
.offset
= offset
;
13056 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
13059 /* Follow reference attribute ATTR of SRC_DIE.
13060 On entry *REF_CU is the CU of SRC_DIE.
13061 On exit *REF_CU is the CU of the result. */
13063 static struct die_info
*
13064 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
13065 struct dwarf2_cu
**ref_cu
)
13067 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
13068 struct dwarf2_cu
*cu
= *ref_cu
;
13069 struct die_info
*die
;
13071 die
= follow_die_offset (offset
, ref_cu
);
13073 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13074 "at 0x%x [in module %s]"),
13075 offset
, src_die
->offset
, cu
->objfile
->name
);
13080 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13081 value is intended for DW_OP_call*. */
13083 struct dwarf2_locexpr_baton
13084 dwarf2_fetch_die_location_block (unsigned int offset
,
13085 struct dwarf2_per_cu_data
*per_cu
,
13086 CORE_ADDR (*get_frame_pc
) (void *baton
),
13089 struct dwarf2_cu
*cu
= per_cu
->cu
;
13090 struct die_info
*die
;
13091 struct attribute
*attr
;
13092 struct dwarf2_locexpr_baton retval
;
13094 dw2_setup (per_cu
->objfile
);
13096 die
= follow_die_offset (offset
, &cu
);
13098 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13099 offset
, per_cu
->cu
->objfile
->name
);
13101 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13104 /* DWARF: "If there is no such attribute, then there is no effect.". */
13106 retval
.data
= NULL
;
13109 else if (attr_form_is_section_offset (attr
))
13111 struct dwarf2_loclist_baton loclist_baton
;
13112 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
13115 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
13117 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
13119 retval
.size
= size
;
13123 if (!attr_form_is_block (attr
))
13124 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13125 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13126 offset
, per_cu
->cu
->objfile
->name
);
13128 retval
.data
= DW_BLOCK (attr
)->data
;
13129 retval
.size
= DW_BLOCK (attr
)->size
;
13131 retval
.per_cu
= cu
->per_cu
;
13135 /* Follow the signature attribute ATTR in SRC_DIE.
13136 On entry *REF_CU is the CU of SRC_DIE.
13137 On exit *REF_CU is the CU of the result. */
13139 static struct die_info
*
13140 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
13141 struct dwarf2_cu
**ref_cu
)
13143 struct objfile
*objfile
= (*ref_cu
)->objfile
;
13144 struct die_info temp_die
;
13145 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13146 struct dwarf2_cu
*sig_cu
;
13147 struct die_info
*die
;
13149 /* sig_type will be NULL if the signatured type is missing from
13151 if (sig_type
== NULL
)
13152 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13153 "at 0x%x [in module %s]"),
13154 src_die
->offset
, objfile
->name
);
13156 /* If necessary, add it to the queue and load its DIEs. */
13158 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
13159 read_signatured_type (objfile
, sig_type
);
13161 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
13163 sig_cu
= sig_type
->per_cu
.cu
;
13164 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
13165 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
13172 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
13173 "at 0x%x [in module %s]"),
13174 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
13177 /* Given an offset of a signatured type, return its signatured_type. */
13179 static struct signatured_type
*
13180 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
13182 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
13183 unsigned int length
, initial_length_size
;
13184 unsigned int sig_offset
;
13185 struct signatured_type find_entry
, *type_sig
;
13187 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
13188 sig_offset
= (initial_length_size
13190 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13191 + 1 /*address_size*/);
13192 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13193 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13195 /* This is only used to lookup previously recorded types.
13196 If we didn't find it, it's our bug. */
13197 gdb_assert (type_sig
!= NULL
);
13198 gdb_assert (offset
== type_sig
->offset
);
13203 /* Read in signatured type at OFFSET and build its CU and die(s). */
13206 read_signatured_type_at_offset (struct objfile
*objfile
,
13207 unsigned int offset
)
13209 struct signatured_type
*type_sig
;
13211 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13213 /* We have the section offset, but we need the signature to do the
13214 hash table lookup. */
13215 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13217 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13219 read_signatured_type (objfile
, type_sig
);
13221 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13224 /* Read in a signatured type and build its CU and DIEs. */
13227 read_signatured_type (struct objfile
*objfile
,
13228 struct signatured_type
*type_sig
)
13230 gdb_byte
*types_ptr
;
13231 struct die_reader_specs reader_specs
;
13232 struct dwarf2_cu
*cu
;
13233 ULONGEST signature
;
13234 struct cleanup
*back_to
, *free_cu_cleanup
;
13236 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13237 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13239 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13241 cu
= xmalloc (sizeof (*cu
));
13242 init_one_comp_unit (cu
, objfile
);
13244 type_sig
->per_cu
.cu
= cu
;
13245 cu
->per_cu
= &type_sig
->per_cu
;
13247 /* If an error occurs while loading, release our storage. */
13248 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13250 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13251 types_ptr
, objfile
->obfd
);
13252 gdb_assert (signature
== type_sig
->signature
);
13255 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13259 &cu
->comp_unit_obstack
,
13260 hashtab_obstack_allocate
,
13261 dummy_obstack_deallocate
);
13263 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13264 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13266 init_cu_die_reader (&reader_specs
, cu
);
13268 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13271 /* We try not to read any attributes in this function, because not
13272 all objfiles needed for references have been loaded yet, and symbol
13273 table processing isn't initialized. But we have to set the CU language,
13274 or we won't be able to build types correctly. */
13275 prepare_one_comp_unit (cu
, cu
->dies
);
13277 do_cleanups (back_to
);
13279 /* We've successfully allocated this compilation unit. Let our caller
13280 clean it up when finished with it. */
13281 discard_cleanups (free_cu_cleanup
);
13283 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13284 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13287 /* Decode simple location descriptions.
13288 Given a pointer to a dwarf block that defines a location, compute
13289 the location and return the value.
13291 NOTE drow/2003-11-18: This function is called in two situations
13292 now: for the address of static or global variables (partial symbols
13293 only) and for offsets into structures which are expected to be
13294 (more or less) constant. The partial symbol case should go away,
13295 and only the constant case should remain. That will let this
13296 function complain more accurately. A few special modes are allowed
13297 without complaint for global variables (for instance, global
13298 register values and thread-local values).
13300 A location description containing no operations indicates that the
13301 object is optimized out. The return value is 0 for that case.
13302 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13303 callers will only want a very basic result and this can become a
13306 Note that stack[0] is unused except as a default error return. */
13309 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13311 struct objfile
*objfile
= cu
->objfile
;
13313 int size
= blk
->size
;
13314 gdb_byte
*data
= blk
->data
;
13315 CORE_ADDR stack
[64];
13317 unsigned int bytes_read
, unsnd
;
13323 stack
[++stacki
] = 0;
13362 stack
[++stacki
] = op
- DW_OP_lit0
;
13397 stack
[++stacki
] = op
- DW_OP_reg0
;
13399 dwarf2_complex_location_expr_complaint ();
13403 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13405 stack
[++stacki
] = unsnd
;
13407 dwarf2_complex_location_expr_complaint ();
13411 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13416 case DW_OP_const1u
:
13417 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13421 case DW_OP_const1s
:
13422 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13426 case DW_OP_const2u
:
13427 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13431 case DW_OP_const2s
:
13432 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13436 case DW_OP_const4u
:
13437 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13441 case DW_OP_const4s
:
13442 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13447 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13453 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13458 stack
[stacki
+ 1] = stack
[stacki
];
13463 stack
[stacki
- 1] += stack
[stacki
];
13467 case DW_OP_plus_uconst
:
13468 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13473 stack
[stacki
- 1] -= stack
[stacki
];
13478 /* If we're not the last op, then we definitely can't encode
13479 this using GDB's address_class enum. This is valid for partial
13480 global symbols, although the variable's address will be bogus
13483 dwarf2_complex_location_expr_complaint ();
13486 case DW_OP_GNU_push_tls_address
:
13487 /* The top of the stack has the offset from the beginning
13488 of the thread control block at which the variable is located. */
13489 /* Nothing should follow this operator, so the top of stack would
13491 /* This is valid for partial global symbols, but the variable's
13492 address will be bogus in the psymtab. */
13494 dwarf2_complex_location_expr_complaint ();
13497 case DW_OP_GNU_uninit
:
13501 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13502 dwarf_stack_op_name (op
, 1));
13503 return (stack
[stacki
]);
13506 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13507 outside of the allocated space. Also enforce minimum>0. */
13508 if (stacki
>= ARRAY_SIZE (stack
) - 1)
13510 complaint (&symfile_complaints
,
13511 _("location description stack overflow"));
13517 complaint (&symfile_complaints
,
13518 _("location description stack underflow"));
13522 return (stack
[stacki
]);
13525 /* memory allocation interface */
13527 static struct dwarf_block
*
13528 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13530 struct dwarf_block
*blk
;
13532 blk
= (struct dwarf_block
*)
13533 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13537 static struct abbrev_info
*
13538 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13540 struct abbrev_info
*abbrev
;
13542 abbrev
= (struct abbrev_info
*)
13543 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13544 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13548 static struct die_info
*
13549 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13551 struct die_info
*die
;
13552 size_t size
= sizeof (struct die_info
);
13555 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13557 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13558 memset (die
, 0, sizeof (struct die_info
));
13563 /* Macro support. */
13566 /* Return the full name of file number I in *LH's file name table.
13567 Use COMP_DIR as the name of the current directory of the
13568 compilation. The result is allocated using xmalloc; the caller is
13569 responsible for freeing it. */
13571 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13573 /* Is the file number a valid index into the line header's file name
13574 table? Remember that file numbers start with one, not zero. */
13575 if (1 <= file
&& file
<= lh
->num_file_names
)
13577 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13579 if (IS_ABSOLUTE_PATH (fe
->name
))
13580 return xstrdup (fe
->name
);
13588 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13594 dir_len
= strlen (dir
);
13595 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13596 strcpy (full_name
, dir
);
13597 full_name
[dir_len
] = '/';
13598 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13602 return xstrdup (fe
->name
);
13607 /* The compiler produced a bogus file number. We can at least
13608 record the macro definitions made in the file, even if we
13609 won't be able to find the file by name. */
13610 char fake_name
[80];
13612 sprintf (fake_name
, "<bad macro file number %d>", file
);
13614 complaint (&symfile_complaints
,
13615 _("bad file number in macro information (%d)"),
13618 return xstrdup (fake_name
);
13623 static struct macro_source_file
*
13624 macro_start_file (int file
, int line
,
13625 struct macro_source_file
*current_file
,
13626 const char *comp_dir
,
13627 struct line_header
*lh
, struct objfile
*objfile
)
13629 /* The full name of this source file. */
13630 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13632 /* We don't create a macro table for this compilation unit
13633 at all until we actually get a filename. */
13634 if (! pending_macros
)
13635 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13636 objfile
->macro_cache
);
13638 if (! current_file
)
13639 /* If we have no current file, then this must be the start_file
13640 directive for the compilation unit's main source file. */
13641 current_file
= macro_set_main (pending_macros
, full_name
);
13643 current_file
= macro_include (current_file
, line
, full_name
);
13647 return current_file
;
13651 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13652 followed by a null byte. */
13654 copy_string (const char *buf
, int len
)
13656 char *s
= xmalloc (len
+ 1);
13658 memcpy (s
, buf
, len
);
13664 static const char *
13665 consume_improper_spaces (const char *p
, const char *body
)
13669 complaint (&symfile_complaints
,
13670 _("macro definition contains spaces in formal argument list:\n`%s'"),
13682 parse_macro_definition (struct macro_source_file
*file
, int line
,
13687 /* The body string takes one of two forms. For object-like macro
13688 definitions, it should be:
13690 <macro name> " " <definition>
13692 For function-like macro definitions, it should be:
13694 <macro name> "() " <definition>
13696 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13698 Spaces may appear only where explicitly indicated, and in the
13701 The Dwarf 2 spec says that an object-like macro's name is always
13702 followed by a space, but versions of GCC around March 2002 omit
13703 the space when the macro's definition is the empty string.
13705 The Dwarf 2 spec says that there should be no spaces between the
13706 formal arguments in a function-like macro's formal argument list,
13707 but versions of GCC around March 2002 include spaces after the
13711 /* Find the extent of the macro name. The macro name is terminated
13712 by either a space or null character (for an object-like macro) or
13713 an opening paren (for a function-like macro). */
13714 for (p
= body
; *p
; p
++)
13715 if (*p
== ' ' || *p
== '(')
13718 if (*p
== ' ' || *p
== '\0')
13720 /* It's an object-like macro. */
13721 int name_len
= p
- body
;
13722 char *name
= copy_string (body
, name_len
);
13723 const char *replacement
;
13726 replacement
= body
+ name_len
+ 1;
13729 dwarf2_macro_malformed_definition_complaint (body
);
13730 replacement
= body
+ name_len
;
13733 macro_define_object (file
, line
, name
, replacement
);
13737 else if (*p
== '(')
13739 /* It's a function-like macro. */
13740 char *name
= copy_string (body
, p
- body
);
13743 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13747 p
= consume_improper_spaces (p
, body
);
13749 /* Parse the formal argument list. */
13750 while (*p
&& *p
!= ')')
13752 /* Find the extent of the current argument name. */
13753 const char *arg_start
= p
;
13755 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13758 if (! *p
|| p
== arg_start
)
13759 dwarf2_macro_malformed_definition_complaint (body
);
13762 /* Make sure argv has room for the new argument. */
13763 if (argc
>= argv_size
)
13766 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13769 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13772 p
= consume_improper_spaces (p
, body
);
13774 /* Consume the comma, if present. */
13779 p
= consume_improper_spaces (p
, body
);
13788 /* Perfectly formed definition, no complaints. */
13789 macro_define_function (file
, line
, name
,
13790 argc
, (const char **) argv
,
13792 else if (*p
== '\0')
13794 /* Complain, but do define it. */
13795 dwarf2_macro_malformed_definition_complaint (body
);
13796 macro_define_function (file
, line
, name
,
13797 argc
, (const char **) argv
,
13801 /* Just complain. */
13802 dwarf2_macro_malformed_definition_complaint (body
);
13805 /* Just complain. */
13806 dwarf2_macro_malformed_definition_complaint (body
);
13812 for (i
= 0; i
< argc
; i
++)
13818 dwarf2_macro_malformed_definition_complaint (body
);
13823 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13824 char *comp_dir
, bfd
*abfd
,
13825 struct dwarf2_cu
*cu
)
13827 gdb_byte
*mac_ptr
, *mac_end
;
13828 struct macro_source_file
*current_file
= 0;
13829 enum dwarf_macinfo_record_type macinfo_type
;
13830 int at_commandline
;
13832 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13833 &dwarf2_per_objfile
->macinfo
);
13834 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13836 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13840 /* First pass: Find the name of the base filename.
13841 This filename is needed in order to process all macros whose definition
13842 (or undefinition) comes from the command line. These macros are defined
13843 before the first DW_MACINFO_start_file entry, and yet still need to be
13844 associated to the base file.
13846 To determine the base file name, we scan the macro definitions until we
13847 reach the first DW_MACINFO_start_file entry. We then initialize
13848 CURRENT_FILE accordingly so that any macro definition found before the
13849 first DW_MACINFO_start_file can still be associated to the base file. */
13851 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13852 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13853 + dwarf2_per_objfile
->macinfo
.size
;
13857 /* Do we at least have room for a macinfo type byte? */
13858 if (mac_ptr
>= mac_end
)
13860 /* Complaint is printed during the second pass as GDB will probably
13861 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13865 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13868 switch (macinfo_type
)
13870 /* A zero macinfo type indicates the end of the macro
13875 case DW_MACINFO_define
:
13876 case DW_MACINFO_undef
:
13877 /* Only skip the data by MAC_PTR. */
13879 unsigned int bytes_read
;
13881 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13882 mac_ptr
+= bytes_read
;
13883 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13884 mac_ptr
+= bytes_read
;
13888 case DW_MACINFO_start_file
:
13890 unsigned int bytes_read
;
13893 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13894 mac_ptr
+= bytes_read
;
13895 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13896 mac_ptr
+= bytes_read
;
13898 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13903 case DW_MACINFO_end_file
:
13904 /* No data to skip by MAC_PTR. */
13907 case DW_MACINFO_vendor_ext
:
13908 /* Only skip the data by MAC_PTR. */
13910 unsigned int bytes_read
;
13912 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13913 mac_ptr
+= bytes_read
;
13914 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13915 mac_ptr
+= bytes_read
;
13922 } while (macinfo_type
!= 0 && current_file
== NULL
);
13924 /* Second pass: Process all entries.
13926 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13927 command-line macro definitions/undefinitions. This flag is unset when we
13928 reach the first DW_MACINFO_start_file entry. */
13930 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13932 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13933 GDB is still reading the definitions from command line. First
13934 DW_MACINFO_start_file will need to be ignored as it was already executed
13935 to create CURRENT_FILE for the main source holding also the command line
13936 definitions. On first met DW_MACINFO_start_file this flag is reset to
13937 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13939 at_commandline
= 1;
13943 /* Do we at least have room for a macinfo type byte? */
13944 if (mac_ptr
>= mac_end
)
13946 dwarf2_macros_too_long_complaint ();
13950 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13953 switch (macinfo_type
)
13955 /* A zero macinfo type indicates the end of the macro
13960 case DW_MACINFO_define
:
13961 case DW_MACINFO_undef
:
13963 unsigned int bytes_read
;
13967 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13968 mac_ptr
+= bytes_read
;
13969 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13970 mac_ptr
+= bytes_read
;
13972 if (! current_file
)
13974 /* DWARF violation as no main source is present. */
13975 complaint (&symfile_complaints
,
13976 _("debug info with no main source gives macro %s "
13978 macinfo_type
== DW_MACINFO_define
?
13980 macinfo_type
== DW_MACINFO_undef
?
13981 _("undefinition") :
13982 _("something-or-other"), line
, body
);
13985 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13986 complaint (&symfile_complaints
,
13987 _("debug info gives %s macro %s with %s line %d: %s"),
13988 at_commandline
? _("command-line") : _("in-file"),
13989 macinfo_type
== DW_MACINFO_define
?
13991 macinfo_type
== DW_MACINFO_undef
?
13992 _("undefinition") :
13993 _("something-or-other"),
13994 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13996 if (macinfo_type
== DW_MACINFO_define
)
13997 parse_macro_definition (current_file
, line
, body
);
13998 else if (macinfo_type
== DW_MACINFO_undef
)
13999 macro_undef (current_file
, line
, body
);
14003 case DW_MACINFO_start_file
:
14005 unsigned int bytes_read
;
14008 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14009 mac_ptr
+= bytes_read
;
14010 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14011 mac_ptr
+= bytes_read
;
14013 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
14014 complaint (&symfile_complaints
,
14015 _("debug info gives source %d included "
14016 "from %s at %s line %d"),
14017 file
, at_commandline
? _("command-line") : _("file"),
14018 line
== 0 ? _("zero") : _("non-zero"), line
);
14020 if (at_commandline
)
14022 /* This DW_MACINFO_start_file was executed in the pass one. */
14023 at_commandline
= 0;
14026 current_file
= macro_start_file (file
, line
,
14027 current_file
, comp_dir
,
14032 case DW_MACINFO_end_file
:
14033 if (! current_file
)
14034 complaint (&symfile_complaints
,
14035 _("macro debug info has an unmatched `close_file' directive"));
14038 current_file
= current_file
->included_by
;
14039 if (! current_file
)
14041 enum dwarf_macinfo_record_type next_type
;
14043 /* GCC circa March 2002 doesn't produce the zero
14044 type byte marking the end of the compilation
14045 unit. Complain if it's not there, but exit no
14048 /* Do we at least have room for a macinfo type byte? */
14049 if (mac_ptr
>= mac_end
)
14051 dwarf2_macros_too_long_complaint ();
14055 /* We don't increment mac_ptr here, so this is just
14057 next_type
= read_1_byte (abfd
, mac_ptr
);
14058 if (next_type
!= 0)
14059 complaint (&symfile_complaints
,
14060 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
14067 case DW_MACINFO_vendor_ext
:
14069 unsigned int bytes_read
;
14073 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14074 mac_ptr
+= bytes_read
;
14075 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14076 mac_ptr
+= bytes_read
;
14078 /* We don't recognize any vendor extensions. */
14082 } while (macinfo_type
!= 0);
14085 /* Check if the attribute's form is a DW_FORM_block*
14086 if so return true else false. */
14088 attr_form_is_block (struct attribute
*attr
)
14090 return (attr
== NULL
? 0 :
14091 attr
->form
== DW_FORM_block1
14092 || attr
->form
== DW_FORM_block2
14093 || attr
->form
== DW_FORM_block4
14094 || attr
->form
== DW_FORM_block
14095 || attr
->form
== DW_FORM_exprloc
);
14098 /* Return non-zero if ATTR's value is a section offset --- classes
14099 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14100 You may use DW_UNSND (attr) to retrieve such offsets.
14102 Section 7.5.4, "Attribute Encodings", explains that no attribute
14103 may have a value that belongs to more than one of these classes; it
14104 would be ambiguous if we did, because we use the same forms for all
14107 attr_form_is_section_offset (struct attribute
*attr
)
14109 return (attr
->form
== DW_FORM_data4
14110 || attr
->form
== DW_FORM_data8
14111 || attr
->form
== DW_FORM_sec_offset
);
14115 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14116 zero otherwise. When this function returns true, you can apply
14117 dwarf2_get_attr_constant_value to it.
14119 However, note that for some attributes you must check
14120 attr_form_is_section_offset before using this test. DW_FORM_data4
14121 and DW_FORM_data8 are members of both the constant class, and of
14122 the classes that contain offsets into other debug sections
14123 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14124 that, if an attribute's can be either a constant or one of the
14125 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14126 taken as section offsets, not constants. */
14128 attr_form_is_constant (struct attribute
*attr
)
14130 switch (attr
->form
)
14132 case DW_FORM_sdata
:
14133 case DW_FORM_udata
:
14134 case DW_FORM_data1
:
14135 case DW_FORM_data2
:
14136 case DW_FORM_data4
:
14137 case DW_FORM_data8
:
14144 /* A helper function that fills in a dwarf2_loclist_baton. */
14147 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
14148 struct dwarf2_loclist_baton
*baton
,
14149 struct attribute
*attr
)
14151 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14152 &dwarf2_per_objfile
->loc
);
14154 baton
->per_cu
= cu
->per_cu
;
14155 gdb_assert (baton
->per_cu
);
14156 /* We don't know how long the location list is, but make sure we
14157 don't run off the edge of the section. */
14158 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
14159 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
14160 baton
->base_address
= cu
->base_address
;
14164 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
14165 struct dwarf2_cu
*cu
)
14167 if (attr_form_is_section_offset (attr
)
14168 /* ".debug_loc" may not exist at all, or the offset may be outside
14169 the section. If so, fall through to the complaint in the
14171 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
14173 struct dwarf2_loclist_baton
*baton
;
14175 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14176 sizeof (struct dwarf2_loclist_baton
));
14178 fill_in_loclist_baton (cu
, baton
, attr
);
14180 if (cu
->base_known
== 0)
14181 complaint (&symfile_complaints
,
14182 _("Location list used without specifying the CU base address."));
14184 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
14185 SYMBOL_LOCATION_BATON (sym
) = baton
;
14189 struct dwarf2_locexpr_baton
*baton
;
14191 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14192 sizeof (struct dwarf2_locexpr_baton
));
14193 baton
->per_cu
= cu
->per_cu
;
14194 gdb_assert (baton
->per_cu
);
14196 if (attr_form_is_block (attr
))
14198 /* Note that we're just copying the block's data pointer
14199 here, not the actual data. We're still pointing into the
14200 info_buffer for SYM's objfile; right now we never release
14201 that buffer, but when we do clean up properly this may
14203 baton
->size
= DW_BLOCK (attr
)->size
;
14204 baton
->data
= DW_BLOCK (attr
)->data
;
14208 dwarf2_invalid_attrib_class_complaint ("location description",
14209 SYMBOL_NATURAL_NAME (sym
));
14211 baton
->data
= NULL
;
14214 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14215 SYMBOL_LOCATION_BATON (sym
) = baton
;
14219 /* Return the OBJFILE associated with the compilation unit CU. If CU
14220 came from a separate debuginfo file, then the master objfile is
14224 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14226 struct objfile
*objfile
= per_cu
->objfile
;
14228 /* Return the master objfile, so that we can report and look up the
14229 correct file containing this variable. */
14230 if (objfile
->separate_debug_objfile_backlink
)
14231 objfile
= objfile
->separate_debug_objfile_backlink
;
14236 /* Return the address size given in the compilation unit header for CU. */
14239 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14242 return per_cu
->cu
->header
.addr_size
;
14245 /* If the CU is not currently read in, we re-read its header. */
14246 struct objfile
*objfile
= per_cu
->objfile
;
14247 struct dwarf2_per_objfile
*per_objfile
14248 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14249 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14250 struct comp_unit_head cu_header
;
14252 memset (&cu_header
, 0, sizeof cu_header
);
14253 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14254 return cu_header
.addr_size
;
14258 /* Return the offset size given in the compilation unit header for CU. */
14261 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14264 return per_cu
->cu
->header
.offset_size
;
14267 /* If the CU is not currently read in, we re-read its header. */
14268 struct objfile
*objfile
= per_cu
->objfile
;
14269 struct dwarf2_per_objfile
*per_objfile
14270 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14271 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14272 struct comp_unit_head cu_header
;
14274 memset (&cu_header
, 0, sizeof cu_header
);
14275 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14276 return cu_header
.offset_size
;
14280 /* Return the text offset of the CU. The returned offset comes from
14281 this CU's objfile. If this objfile came from a separate debuginfo
14282 file, then the offset may be different from the corresponding
14283 offset in the parent objfile. */
14286 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14288 struct objfile
*objfile
= per_cu
->objfile
;
14290 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14293 /* Locate the .debug_info compilation unit from CU's objfile which contains
14294 the DIE at OFFSET. Raises an error on failure. */
14296 static struct dwarf2_per_cu_data
*
14297 dwarf2_find_containing_comp_unit (unsigned int offset
,
14298 struct objfile
*objfile
)
14300 struct dwarf2_per_cu_data
*this_cu
;
14304 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14307 int mid
= low
+ (high
- low
) / 2;
14309 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14314 gdb_assert (low
== high
);
14315 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14318 error (_("Dwarf Error: could not find partial DIE containing "
14319 "offset 0x%lx [in module %s]"),
14320 (long) offset
, bfd_get_filename (objfile
->obfd
));
14322 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14323 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14327 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14328 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14329 && offset
>= this_cu
->offset
+ this_cu
->length
)
14330 error (_("invalid dwarf2 offset %u"), offset
);
14331 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14336 /* Locate the compilation unit from OBJFILE which is located at exactly
14337 OFFSET. Raises an error on failure. */
14339 static struct dwarf2_per_cu_data
*
14340 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14342 struct dwarf2_per_cu_data
*this_cu
;
14344 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14345 if (this_cu
->offset
!= offset
)
14346 error (_("no compilation unit with offset %u."), offset
);
14350 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14353 init_one_comp_unit (struct dwarf2_cu
*cu
, struct objfile
*objfile
)
14355 memset (cu
, 0, sizeof (*cu
));
14356 cu
->objfile
= objfile
;
14357 obstack_init (&cu
->comp_unit_obstack
);
14360 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14363 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
14365 struct attribute
*attr
;
14367 /* Set the language we're debugging. */
14368 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
14370 set_cu_language (DW_UNSND (attr
), cu
);
14372 set_cu_language (language_minimal
, cu
);
14375 /* Release one cached compilation unit, CU. We unlink it from the tree
14376 of compilation units, but we don't remove it from the read_in_chain;
14377 the caller is responsible for that.
14378 NOTE: DATA is a void * because this function is also used as a
14379 cleanup routine. */
14382 free_one_comp_unit (void *data
)
14384 struct dwarf2_cu
*cu
= data
;
14386 if (cu
->per_cu
!= NULL
)
14387 cu
->per_cu
->cu
= NULL
;
14390 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14395 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14396 when we're finished with it. We can't free the pointer itself, but be
14397 sure to unlink it from the cache. Also release any associated storage
14398 and perform cache maintenance.
14400 Only used during partial symbol parsing. */
14403 free_stack_comp_unit (void *data
)
14405 struct dwarf2_cu
*cu
= data
;
14407 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14408 cu
->partial_dies
= NULL
;
14410 if (cu
->per_cu
!= NULL
)
14412 /* This compilation unit is on the stack in our caller, so we
14413 should not xfree it. Just unlink it. */
14414 cu
->per_cu
->cu
= NULL
;
14417 /* If we had a per-cu pointer, then we may have other compilation
14418 units loaded, so age them now. */
14419 age_cached_comp_units ();
14423 /* Free all cached compilation units. */
14426 free_cached_comp_units (void *data
)
14428 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14430 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14431 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14432 while (per_cu
!= NULL
)
14434 struct dwarf2_per_cu_data
*next_cu
;
14436 next_cu
= per_cu
->cu
->read_in_chain
;
14438 free_one_comp_unit (per_cu
->cu
);
14439 *last_chain
= next_cu
;
14445 /* Increase the age counter on each cached compilation unit, and free
14446 any that are too old. */
14449 age_cached_comp_units (void)
14451 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14453 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14454 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14455 while (per_cu
!= NULL
)
14457 per_cu
->cu
->last_used
++;
14458 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14459 dwarf2_mark (per_cu
->cu
);
14460 per_cu
= per_cu
->cu
->read_in_chain
;
14463 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14464 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14465 while (per_cu
!= NULL
)
14467 struct dwarf2_per_cu_data
*next_cu
;
14469 next_cu
= per_cu
->cu
->read_in_chain
;
14471 if (!per_cu
->cu
->mark
)
14473 free_one_comp_unit (per_cu
->cu
);
14474 *last_chain
= next_cu
;
14477 last_chain
= &per_cu
->cu
->read_in_chain
;
14483 /* Remove a single compilation unit from the cache. */
14486 free_one_cached_comp_unit (void *target_cu
)
14488 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14490 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14491 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14492 while (per_cu
!= NULL
)
14494 struct dwarf2_per_cu_data
*next_cu
;
14496 next_cu
= per_cu
->cu
->read_in_chain
;
14498 if (per_cu
->cu
== target_cu
)
14500 free_one_comp_unit (per_cu
->cu
);
14501 *last_chain
= next_cu
;
14505 last_chain
= &per_cu
->cu
->read_in_chain
;
14511 /* Release all extra memory associated with OBJFILE. */
14514 dwarf2_free_objfile (struct objfile
*objfile
)
14516 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14518 if (dwarf2_per_objfile
== NULL
)
14521 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14522 free_cached_comp_units (NULL
);
14524 if (dwarf2_per_objfile
->using_index
)
14528 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14531 struct dwarf2_per_cu_data
*per_cu
=
14532 dwarf2_per_objfile
->all_comp_units
[i
];
14534 if (!per_cu
->v
.quick
->lines
)
14537 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14539 if (per_cu
->v
.quick
->file_names
)
14540 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14541 if (per_cu
->v
.quick
->full_names
)
14542 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14545 free_line_header (per_cu
->v
.quick
->lines
);
14549 /* Everything else should be on the objfile obstack. */
14552 /* A pair of DIE offset and GDB type pointer. We store these
14553 in a hash table separate from the DIEs, and preserve them
14554 when the DIEs are flushed out of cache. */
14556 struct dwarf2_offset_and_type
14558 unsigned int offset
;
14562 /* Hash function for a dwarf2_offset_and_type. */
14565 offset_and_type_hash (const void *item
)
14567 const struct dwarf2_offset_and_type
*ofs
= item
;
14569 return ofs
->offset
;
14572 /* Equality function for a dwarf2_offset_and_type. */
14575 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14577 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14578 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14580 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14583 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14584 table if necessary. For convenience, return TYPE.
14586 The DIEs reading must have careful ordering to:
14587 * Not cause infite loops trying to read in DIEs as a prerequisite for
14588 reading current DIE.
14589 * Not trying to dereference contents of still incompletely read in types
14590 while reading in other DIEs.
14591 * Enable referencing still incompletely read in types just by a pointer to
14592 the type without accessing its fields.
14594 Therefore caller should follow these rules:
14595 * Try to fetch any prerequisite types we may need to build this DIE type
14596 before building the type and calling set_die_type.
14597 * After building type call set_die_type for current DIE as soon as
14598 possible before fetching more types to complete the current type.
14599 * Make the type as complete as possible before fetching more types. */
14601 static struct type
*
14602 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14604 struct dwarf2_offset_and_type
**slot
, ofs
;
14605 struct objfile
*objfile
= cu
->objfile
;
14606 htab_t
*type_hash_ptr
;
14608 /* For Ada types, make sure that the gnat-specific data is always
14609 initialized (if not already set). There are a few types where
14610 we should not be doing so, because the type-specific area is
14611 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14612 where the type-specific area is used to store the floatformat).
14613 But this is not a problem, because the gnat-specific information
14614 is actually not needed for these types. */
14615 if (need_gnat_info (cu
)
14616 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14617 && TYPE_CODE (type
) != TYPE_CODE_FLT
14618 && !HAVE_GNAT_AUX_INFO (type
))
14619 INIT_GNAT_SPECIFIC (type
);
14621 if (cu
->per_cu
->from_debug_types
)
14622 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14624 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14626 if (*type_hash_ptr
== NULL
)
14629 = htab_create_alloc_ex (127,
14630 offset_and_type_hash
,
14631 offset_and_type_eq
,
14633 &objfile
->objfile_obstack
,
14634 hashtab_obstack_allocate
,
14635 dummy_obstack_deallocate
);
14638 ofs
.offset
= die
->offset
;
14640 slot
= (struct dwarf2_offset_and_type
**)
14641 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14643 complaint (&symfile_complaints
,
14644 _("A problem internal to GDB: DIE 0x%x has type already set"),
14646 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14651 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14652 table, or return NULL if the die does not have a saved type. */
14654 static struct type
*
14655 get_die_type_at_offset (unsigned int offset
,
14656 struct dwarf2_per_cu_data
*per_cu
)
14658 struct dwarf2_offset_and_type
*slot
, ofs
;
14661 if (per_cu
->from_debug_types
)
14662 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14664 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14665 if (type_hash
== NULL
)
14668 ofs
.offset
= offset
;
14669 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14676 /* Look up the type for DIE in the appropriate type_hash table,
14677 or return NULL if DIE does not have a saved type. */
14679 static struct type
*
14680 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14682 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14685 /* Add a dependence relationship from CU to REF_PER_CU. */
14688 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14689 struct dwarf2_per_cu_data
*ref_per_cu
)
14693 if (cu
->dependencies
== NULL
)
14695 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14696 NULL
, &cu
->comp_unit_obstack
,
14697 hashtab_obstack_allocate
,
14698 dummy_obstack_deallocate
);
14700 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14702 *slot
= ref_per_cu
;
14705 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14706 Set the mark field in every compilation unit in the
14707 cache that we must keep because we are keeping CU. */
14710 dwarf2_mark_helper (void **slot
, void *data
)
14712 struct dwarf2_per_cu_data
*per_cu
;
14714 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14715 if (per_cu
->cu
->mark
)
14717 per_cu
->cu
->mark
= 1;
14719 if (per_cu
->cu
->dependencies
!= NULL
)
14720 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14725 /* Set the mark field in CU and in every other compilation unit in the
14726 cache that we must keep because we are keeping CU. */
14729 dwarf2_mark (struct dwarf2_cu
*cu
)
14734 if (cu
->dependencies
!= NULL
)
14735 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14739 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14743 per_cu
->cu
->mark
= 0;
14744 per_cu
= per_cu
->cu
->read_in_chain
;
14748 /* Trivial hash function for partial_die_info: the hash value of a DIE
14749 is its offset in .debug_info for this objfile. */
14752 partial_die_hash (const void *item
)
14754 const struct partial_die_info
*part_die
= item
;
14756 return part_die
->offset
;
14759 /* Trivial comparison function for partial_die_info structures: two DIEs
14760 are equal if they have the same offset. */
14763 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14765 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14766 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14768 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14771 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14772 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14775 set_dwarf2_cmd (char *args
, int from_tty
)
14777 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14781 show_dwarf2_cmd (char *args
, int from_tty
)
14783 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14786 /* If section described by INFO was mmapped, munmap it now. */
14789 munmap_section_buffer (struct dwarf2_section_info
*info
)
14791 if (info
->was_mmapped
)
14794 intptr_t begin
= (intptr_t) info
->buffer
;
14795 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14796 size_t map_length
= info
->size
+ begin
- map_begin
;
14798 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14800 /* Without HAVE_MMAP, we should never be here to begin with. */
14801 gdb_assert_not_reached ("no mmap support");
14806 /* munmap debug sections for OBJFILE, if necessary. */
14809 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14811 struct dwarf2_per_objfile
*data
= d
;
14813 /* This is sorted according to the order they're defined in to make it easier
14814 to keep in sync. */
14815 munmap_section_buffer (&data
->info
);
14816 munmap_section_buffer (&data
->abbrev
);
14817 munmap_section_buffer (&data
->line
);
14818 munmap_section_buffer (&data
->loc
);
14819 munmap_section_buffer (&data
->macinfo
);
14820 munmap_section_buffer (&data
->str
);
14821 munmap_section_buffer (&data
->ranges
);
14822 munmap_section_buffer (&data
->types
);
14823 munmap_section_buffer (&data
->frame
);
14824 munmap_section_buffer (&data
->eh_frame
);
14825 munmap_section_buffer (&data
->gdb_index
);
14830 /* The contents of the hash table we create when building the string
14832 struct strtab_entry
14834 offset_type offset
;
14838 /* Hash function for a strtab_entry. */
14841 hash_strtab_entry (const void *e
)
14843 const struct strtab_entry
*entry
= e
;
14844 return mapped_index_string_hash (entry
->str
);
14847 /* Equality function for a strtab_entry. */
14850 eq_strtab_entry (const void *a
, const void *b
)
14852 const struct strtab_entry
*ea
= a
;
14853 const struct strtab_entry
*eb
= b
;
14854 return !strcmp (ea
->str
, eb
->str
);
14857 /* Create a strtab_entry hash table. */
14860 create_strtab (void)
14862 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14863 xfree
, xcalloc
, xfree
);
14866 /* Add a string to the constant pool. Return the string's offset in
14870 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14873 struct strtab_entry entry
;
14874 struct strtab_entry
*result
;
14877 slot
= htab_find_slot (table
, &entry
, INSERT
);
14882 result
= XNEW (struct strtab_entry
);
14883 result
->offset
= obstack_object_size (cpool
);
14885 obstack_grow_str0 (cpool
, str
);
14888 return result
->offset
;
14891 /* An entry in the symbol table. */
14892 struct symtab_index_entry
14894 /* The name of the symbol. */
14896 /* The offset of the name in the constant pool. */
14897 offset_type index_offset
;
14898 /* A sorted vector of the indices of all the CUs that hold an object
14900 VEC (offset_type
) *cu_indices
;
14903 /* The symbol table. This is a power-of-2-sized hash table. */
14904 struct mapped_symtab
14906 offset_type n_elements
;
14908 struct symtab_index_entry
**data
;
14911 /* Hash function for a symtab_index_entry. */
14914 hash_symtab_entry (const void *e
)
14916 const struct symtab_index_entry
*entry
= e
;
14917 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14918 sizeof (offset_type
) * VEC_length (offset_type
,
14919 entry
->cu_indices
),
14923 /* Equality function for a symtab_index_entry. */
14926 eq_symtab_entry (const void *a
, const void *b
)
14928 const struct symtab_index_entry
*ea
= a
;
14929 const struct symtab_index_entry
*eb
= b
;
14930 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14931 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14933 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14934 VEC_address (offset_type
, eb
->cu_indices
),
14935 sizeof (offset_type
) * len
);
14938 /* Destroy a symtab_index_entry. */
14941 delete_symtab_entry (void *p
)
14943 struct symtab_index_entry
*entry
= p
;
14944 VEC_free (offset_type
, entry
->cu_indices
);
14948 /* Create a hash table holding symtab_index_entry objects. */
14951 create_symbol_hash_table (void)
14953 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14954 delete_symtab_entry
, xcalloc
, xfree
);
14957 /* Create a new mapped symtab object. */
14959 static struct mapped_symtab
*
14960 create_mapped_symtab (void)
14962 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14963 symtab
->n_elements
= 0;
14964 symtab
->size
= 1024;
14965 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14969 /* Destroy a mapped_symtab. */
14972 cleanup_mapped_symtab (void *p
)
14974 struct mapped_symtab
*symtab
= p
;
14975 /* The contents of the array are freed when the other hash table is
14977 xfree (symtab
->data
);
14981 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14984 static struct symtab_index_entry
**
14985 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14987 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14989 index
= hash
& (symtab
->size
- 1);
14990 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14994 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14995 return &symtab
->data
[index
];
14996 index
= (index
+ step
) & (symtab
->size
- 1);
15000 /* Expand SYMTAB's hash table. */
15003 hash_expand (struct mapped_symtab
*symtab
)
15005 offset_type old_size
= symtab
->size
;
15007 struct symtab_index_entry
**old_entries
= symtab
->data
;
15010 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15012 for (i
= 0; i
< old_size
; ++i
)
15014 if (old_entries
[i
])
15016 struct symtab_index_entry
**slot
= find_slot (symtab
,
15017 old_entries
[i
]->name
);
15018 *slot
= old_entries
[i
];
15022 xfree (old_entries
);
15025 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15026 is the index of the CU in which the symbol appears. */
15029 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
15030 offset_type cu_index
)
15032 struct symtab_index_entry
**slot
;
15034 ++symtab
->n_elements
;
15035 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
15036 hash_expand (symtab
);
15038 slot
= find_slot (symtab
, name
);
15041 *slot
= XNEW (struct symtab_index_entry
);
15042 (*slot
)->name
= name
;
15043 (*slot
)->cu_indices
= NULL
;
15045 /* Don't push an index twice. Due to how we add entries we only
15046 have to check the last one. */
15047 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
15048 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
15049 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
15052 /* Add a vector of indices to the constant pool. */
15055 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
15056 struct symtab_index_entry
*entry
)
15060 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
15063 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
15064 offset_type val
= MAYBE_SWAP (len
);
15069 entry
->index_offset
= obstack_object_size (cpool
);
15071 obstack_grow (cpool
, &val
, sizeof (val
));
15073 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
15076 val
= MAYBE_SWAP (iter
);
15077 obstack_grow (cpool
, &val
, sizeof (val
));
15082 struct symtab_index_entry
*old_entry
= *slot
;
15083 entry
->index_offset
= old_entry
->index_offset
;
15086 return entry
->index_offset
;
15089 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15090 constant pool entries going into the obstack CPOOL. */
15093 write_hash_table (struct mapped_symtab
*symtab
,
15094 struct obstack
*output
, struct obstack
*cpool
)
15097 htab_t symbol_hash_table
;
15100 symbol_hash_table
= create_symbol_hash_table ();
15101 str_table
= create_strtab ();
15103 /* We add all the index vectors to the constant pool first, to
15104 ensure alignment is ok. */
15105 for (i
= 0; i
< symtab
->size
; ++i
)
15107 if (symtab
->data
[i
])
15108 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
15111 /* Now write out the hash table. */
15112 for (i
= 0; i
< symtab
->size
; ++i
)
15114 offset_type str_off
, vec_off
;
15116 if (symtab
->data
[i
])
15118 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
15119 vec_off
= symtab
->data
[i
]->index_offset
;
15123 /* While 0 is a valid constant pool index, it is not valid
15124 to have 0 for both offsets. */
15129 str_off
= MAYBE_SWAP (str_off
);
15130 vec_off
= MAYBE_SWAP (vec_off
);
15132 obstack_grow (output
, &str_off
, sizeof (str_off
));
15133 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
15136 htab_delete (str_table
);
15137 htab_delete (symbol_hash_table
);
15140 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
15141 from PST; CU_INDEX is the index of the CU in the vector of all
15145 add_address_entry (struct objfile
*objfile
,
15146 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
15147 unsigned int cu_index
)
15149 offset_type offset
;
15151 CORE_ADDR baseaddr
;
15153 /* Don't bother recording empty ranges. */
15154 if (pst
->textlow
== pst
->texthigh
)
15157 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15159 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
15160 obstack_grow (addr_obstack
, addr
, 8);
15161 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
15162 obstack_grow (addr_obstack
, addr
, 8);
15163 offset
= MAYBE_SWAP (cu_index
);
15164 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
15167 /* Add a list of partial symbols to SYMTAB. */
15170 write_psymbols (struct mapped_symtab
*symtab
,
15172 struct partial_symbol
**psymp
,
15174 offset_type cu_index
,
15177 for (; count
-- > 0; ++psymp
)
15179 void **slot
, *lookup
;
15181 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
15182 error (_("Ada is not currently supported by the index"));
15184 /* We only want to add a given psymbol once. However, we also
15185 want to account for whether it is global or static. So, we
15186 may add it twice, using slightly different values. */
15189 uintptr_t val
= 1 | (uintptr_t) *psymp
;
15191 lookup
= (void *) val
;
15196 /* Only add a given psymbol once. */
15197 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
15201 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
15206 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15207 exception if there is an error. */
15210 write_obstack (FILE *file
, struct obstack
*obstack
)
15212 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
15214 != obstack_object_size (obstack
))
15215 error (_("couldn't data write to file"));
15218 /* Unlink a file if the argument is not NULL. */
15221 unlink_if_set (void *p
)
15223 char **filename
= p
;
15225 unlink (*filename
);
15228 /* A helper struct used when iterating over debug_types. */
15229 struct signatured_type_index_data
15231 struct objfile
*objfile
;
15232 struct mapped_symtab
*symtab
;
15233 struct obstack
*types_list
;
15238 /* A helper function that writes a single signatured_type to an
15242 write_one_signatured_type (void **slot
, void *d
)
15244 struct signatured_type_index_data
*info
= d
;
15245 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
15246 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
15247 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15250 write_psymbols (info
->symtab
,
15252 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15253 psymtab
->n_global_syms
, info
->cu_index
,
15255 write_psymbols (info
->symtab
,
15257 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15258 psymtab
->n_static_syms
, info
->cu_index
,
15261 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15262 obstack_grow (info
->types_list
, val
, 8);
15263 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15264 obstack_grow (info
->types_list
, val
, 8);
15265 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15266 obstack_grow (info
->types_list
, val
, 8);
15273 /* A cleanup function for an htab_t. */
15276 cleanup_htab (void *arg
)
15281 /* Create an index file for OBJFILE in the directory DIR. */
15284 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15286 struct cleanup
*cleanup
;
15287 char *filename
, *cleanup_filename
;
15288 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15289 struct obstack cu_list
, types_cu_list
;
15292 struct mapped_symtab
*symtab
;
15293 offset_type val
, size_of_contents
, total_len
;
15298 if (!objfile
->psymtabs
)
15300 if (dwarf2_per_objfile
->using_index
)
15301 error (_("Cannot use an index to create the index"));
15303 if (stat (objfile
->name
, &st
) < 0)
15304 perror_with_name (objfile
->name
);
15306 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15307 INDEX_SUFFIX
, (char *) NULL
);
15308 cleanup
= make_cleanup (xfree
, filename
);
15310 out_file
= fopen (filename
, "wb");
15312 error (_("Can't open `%s' for writing"), filename
);
15314 cleanup_filename
= filename
;
15315 make_cleanup (unlink_if_set
, &cleanup_filename
);
15317 symtab
= create_mapped_symtab ();
15318 make_cleanup (cleanup_mapped_symtab
, symtab
);
15320 obstack_init (&addr_obstack
);
15321 make_cleanup_obstack_free (&addr_obstack
);
15323 obstack_init (&cu_list
);
15324 make_cleanup_obstack_free (&cu_list
);
15326 obstack_init (&types_cu_list
);
15327 make_cleanup_obstack_free (&types_cu_list
);
15329 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15330 NULL
, xcalloc
, xfree
);
15331 make_cleanup (cleanup_htab
, psyms_seen
);
15333 /* The list is already sorted, so we don't need to do additional
15334 work here. Also, the debug_types entries do not appear in
15335 all_comp_units, but only in their own hash table. */
15336 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15338 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15339 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15342 write_psymbols (symtab
,
15344 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15345 psymtab
->n_global_syms
, i
,
15347 write_psymbols (symtab
,
15349 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15350 psymtab
->n_static_syms
, i
,
15353 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15355 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15356 obstack_grow (&cu_list
, val
, 8);
15357 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15358 obstack_grow (&cu_list
, val
, 8);
15361 /* Write out the .debug_type entries, if any. */
15362 if (dwarf2_per_objfile
->signatured_types
)
15364 struct signatured_type_index_data sig_data
;
15366 sig_data
.objfile
= objfile
;
15367 sig_data
.symtab
= symtab
;
15368 sig_data
.types_list
= &types_cu_list
;
15369 sig_data
.psyms_seen
= psyms_seen
;
15370 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15371 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15372 write_one_signatured_type
, &sig_data
);
15375 obstack_init (&constant_pool
);
15376 make_cleanup_obstack_free (&constant_pool
);
15377 obstack_init (&symtab_obstack
);
15378 make_cleanup_obstack_free (&symtab_obstack
);
15379 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15381 obstack_init (&contents
);
15382 make_cleanup_obstack_free (&contents
);
15383 size_of_contents
= 6 * sizeof (offset_type
);
15384 total_len
= size_of_contents
;
15386 /* The version number. */
15387 val
= MAYBE_SWAP (3);
15388 obstack_grow (&contents
, &val
, sizeof (val
));
15390 /* The offset of the CU list from the start of the file. */
15391 val
= MAYBE_SWAP (total_len
);
15392 obstack_grow (&contents
, &val
, sizeof (val
));
15393 total_len
+= obstack_object_size (&cu_list
);
15395 /* The offset of the types CU list from the start of the file. */
15396 val
= MAYBE_SWAP (total_len
);
15397 obstack_grow (&contents
, &val
, sizeof (val
));
15398 total_len
+= obstack_object_size (&types_cu_list
);
15400 /* The offset of the address table from the start of the file. */
15401 val
= MAYBE_SWAP (total_len
);
15402 obstack_grow (&contents
, &val
, sizeof (val
));
15403 total_len
+= obstack_object_size (&addr_obstack
);
15405 /* The offset of the symbol table from the start of the file. */
15406 val
= MAYBE_SWAP (total_len
);
15407 obstack_grow (&contents
, &val
, sizeof (val
));
15408 total_len
+= obstack_object_size (&symtab_obstack
);
15410 /* The offset of the constant pool from the start of the file. */
15411 val
= MAYBE_SWAP (total_len
);
15412 obstack_grow (&contents
, &val
, sizeof (val
));
15413 total_len
+= obstack_object_size (&constant_pool
);
15415 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15417 write_obstack (out_file
, &contents
);
15418 write_obstack (out_file
, &cu_list
);
15419 write_obstack (out_file
, &types_cu_list
);
15420 write_obstack (out_file
, &addr_obstack
);
15421 write_obstack (out_file
, &symtab_obstack
);
15422 write_obstack (out_file
, &constant_pool
);
15426 /* We want to keep the file, so we set cleanup_filename to NULL
15427 here. See unlink_if_set. */
15428 cleanup_filename
= NULL
;
15430 do_cleanups (cleanup
);
15433 /* The mapped index file format is designed to be directly mmap()able
15434 on any architecture. In most cases, a datum is represented using a
15435 little-endian 32-bit integer value, called an offset_type. Big
15436 endian machines must byte-swap the values before using them.
15437 Exceptions to this rule are noted. The data is laid out such that
15438 alignment is always respected.
15440 A mapped index consists of several sections.
15442 1. The file header. This is a sequence of values, of offset_type
15443 unless otherwise noted:
15445 [0] The version number, currently 3. Versions 1 and 2 are
15447 [1] The offset, from the start of the file, of the CU list.
15448 [2] The offset, from the start of the file, of the types CU list.
15449 Note that this section can be empty, in which case this offset will
15450 be equal to the next offset.
15451 [3] The offset, from the start of the file, of the address section.
15452 [4] The offset, from the start of the file, of the symbol table.
15453 [5] The offset, from the start of the file, of the constant pool.
15455 2. The CU list. This is a sequence of pairs of 64-bit
15456 little-endian values, sorted by the CU offset. The first element
15457 in each pair is the offset of a CU in the .debug_info section. The
15458 second element in each pair is the length of that CU. References
15459 to a CU elsewhere in the map are done using a CU index, which is
15460 just the 0-based index into this table. Note that if there are
15461 type CUs, then conceptually CUs and type CUs form a single list for
15462 the purposes of CU indices.
15464 3. The types CU list. This is a sequence of triplets of 64-bit
15465 little-endian values. In a triplet, the first value is the CU
15466 offset, the second value is the type offset in the CU, and the
15467 third value is the type signature. The types CU list is not
15470 4. The address section. The address section consists of a sequence
15471 of address entries. Each address entry has three elements.
15472 [0] The low address. This is a 64-bit little-endian value.
15473 [1] The high address. This is a 64-bit little-endian value.
15474 Like DW_AT_high_pc, the value is one byte beyond the end.
15475 [2] The CU index. This is an offset_type value.
15477 5. The symbol table. This is a hash table. The size of the hash
15478 table is always a power of 2. The initial hash and the step are
15479 currently defined by the `find_slot' function.
15481 Each slot in the hash table consists of a pair of offset_type
15482 values. The first value is the offset of the symbol's name in the
15483 constant pool. The second value is the offset of the CU vector in
15486 If both values are 0, then this slot in the hash table is empty.
15487 This is ok because while 0 is a valid constant pool index, it
15488 cannot be a valid index for both a string and a CU vector.
15490 A string in the constant pool is stored as a \0-terminated string,
15493 A CU vector in the constant pool is a sequence of offset_type
15494 values. The first value is the number of CU indices in the vector.
15495 Each subsequent value is the index of a CU in the CU list. This
15496 element in the hash table is used to indicate which CUs define the
15499 6. The constant pool. This is simply a bunch of bytes. It is
15500 organized so that alignment is correct: CU vectors are stored
15501 first, followed by strings. */
15504 save_gdb_index_command (char *arg
, int from_tty
)
15506 struct objfile
*objfile
;
15509 error (_("usage: save gdb-index DIRECTORY"));
15511 ALL_OBJFILES (objfile
)
15515 /* If the objfile does not correspond to an actual file, skip it. */
15516 if (stat (objfile
->name
, &st
) < 0)
15519 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15520 if (dwarf2_per_objfile
)
15522 volatile struct gdb_exception except
;
15524 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15526 write_psymtabs_to_index (objfile
, arg
);
15528 if (except
.reason
< 0)
15529 exception_fprintf (gdb_stderr
, except
,
15530 _("Error while writing index for `%s': "),
15538 int dwarf2_always_disassemble
;
15541 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15542 struct cmd_list_element
*c
, const char *value
)
15544 fprintf_filtered (file
, _("\
15545 Whether to always disassemble DWARF expressions is %s.\n"),
15549 void _initialize_dwarf2_read (void);
15552 _initialize_dwarf2_read (void)
15554 struct cmd_list_element
*c
;
15556 dwarf2_objfile_data_key
15557 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15559 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15560 Set DWARF 2 specific variables.\n\
15561 Configure DWARF 2 variables such as the cache size"),
15562 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15563 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15565 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15566 Show DWARF 2 specific variables\n\
15567 Show DWARF 2 variables such as the cache size"),
15568 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15569 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15571 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15572 &dwarf2_max_cache_age
, _("\
15573 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15574 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15575 A higher limit means that cached compilation units will be stored\n\
15576 in memory longer, and more total memory will be used. Zero disables\n\
15577 caching, which can slow down startup."),
15579 show_dwarf2_max_cache_age
,
15580 &set_dwarf2_cmdlist
,
15581 &show_dwarf2_cmdlist
);
15583 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15584 &dwarf2_always_disassemble
, _("\
15585 Set whether `info address' always disassembles DWARF expressions."), _("\
15586 Show whether `info address' always disassembles DWARF expressions."), _("\
15587 When enabled, DWARF expressions are always printed in an assembly-like\n\
15588 syntax. When disabled, expressions will be printed in a more\n\
15589 conversational style, when possible."),
15591 show_dwarf2_always_disassemble
,
15592 &set_dwarf2_cmdlist
,
15593 &show_dwarf2_cmdlist
);
15595 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15596 Set debugging of the dwarf2 DIE reader."), _("\
15597 Show debugging of the dwarf2 DIE reader."), _("\
15598 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15599 The value is the maximum depth to print."),
15602 &setdebuglist
, &showdebuglist
);
15604 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15606 Save a .gdb-index file.\n\
15607 Usage: save gdb-index DIRECTORY"),
15609 set_cmd_completer (c
, filename_completer
);