1 /* Support routines for building symbol tables in GDB's internal format.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides subroutines used for creating and adding to
20 the symbol table. These routines are called from various symbol-
21 file-reading routines.
23 Routines to support specific debugging information formats (stabs,
24 DWARF, etc) belong somewhere else.
26 The basic way this module is used is as follows:
29 cleanups = make_cleanup (really_free_pendings, NULL);
30 cust = start_symtab (...);
31 ... read debug info ...
32 cust = end_symtab (...);
33 do_cleanups (cleanups);
35 The compunit symtab pointer ("cust") is returned from both start_symtab
36 and end_symtab to simplify the debug info readers.
38 There are minor variations on this, e.g., dwarf2read.c splits end_symtab
39 into two calls: end_symtab_get_static_block, end_symtab_from_static_block,
40 but all debug info readers follow this basic flow.
42 Reading DWARF Type Units is another variation:
45 cleanups = make_cleanup (really_free_pendings, NULL);
46 cust = start_symtab (...);
47 ... read debug info ...
48 cust = end_expandable_symtab (...);
49 do_cleanups (cleanups);
51 And then reading subsequent Type Units within the containing "Comp Unit"
52 will use a second flow:
55 cleanups = make_cleanup (really_free_pendings, NULL);
56 cust = restart_symtab (...);
57 ... read debug info ...
58 cust = augment_type_symtab (...);
59 do_cleanups (cleanups);
61 dbxread.c and xcoffread.c use another variation:
64 cleanups = make_cleanup (really_free_pendings, NULL);
65 cust = start_symtab (...);
66 ... read debug info ...
67 cust = end_symtab (...);
68 ... start_symtab + read + end_symtab repeated ...
69 do_cleanups (cleanups);
74 #include "gdb_obstack.h"
79 #include "complaints.h"
80 #include "expression.h" /* For "enum exp_opcode" used by... */
82 #include "filenames.h" /* For DOSish file names. */
84 #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */
86 #include "cp-support.h"
87 #include "dictionary.h"
91 /* Ask buildsym.h to define the vars it normally declares `extern'. */
94 #include "buildsym.h" /* Our own declarations. */
97 /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat
98 questionable--see comment where we call them). */
100 #include "stabsread.h"
102 /* Buildsym's counterpart to struct compunit_symtab.
103 TODO(dje): Move all related global state into here. */
105 struct buildsym_compunit
107 /* The objfile we're reading debug info from. */
108 struct objfile
*objfile
;
110 /* List of subfiles (source files).
111 Files are added to the front of the list.
112 This is important mostly for the language determination hacks we use,
113 which iterate over previously added files. */
114 struct subfile
*subfiles
;
116 /* The subfile of the main source file. */
117 struct subfile
*main_subfile
;
119 /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */
122 /* Space for this is not malloc'd, and is assumed to have at least
123 the same lifetime as objfile. */
124 const char *producer
;
126 /* Space for this is not malloc'd, and is assumed to have at least
127 the same lifetime as objfile. */
128 const char *debugformat
;
130 /* The compunit we are building. */
131 struct compunit_symtab
*compunit_symtab
;
134 /* The work-in-progress of the compunit we are building.
135 This is created first, before any subfiles by start_symtab. */
137 static struct buildsym_compunit
*buildsym_compunit
;
139 /* List of free `struct pending' structures for reuse. */
141 static struct pending
*free_pendings
;
143 /* Non-zero if symtab has line number info. This prevents an
144 otherwise empty symtab from being tossed. */
146 static int have_line_numbers
;
148 /* The mutable address map for the compilation unit whose symbols
149 we're currently reading. The symtabs' shared blockvector will
150 point to a fixed copy of this. */
151 static struct addrmap
*pending_addrmap
;
153 /* The obstack on which we allocate pending_addrmap.
154 If pending_addrmap is NULL, this is uninitialized; otherwise, it is
155 initialized (and holds pending_addrmap). */
156 static struct obstack pending_addrmap_obstack
;
158 /* Non-zero if we recorded any ranges in the addrmap that are
159 different from those in the blockvector already. We set this to
160 zero when we start processing a symfile, and if it's still zero at
161 the end, then we just toss the addrmap. */
162 static int pending_addrmap_interesting
;
164 /* An obstack used for allocating pending blocks. */
166 static struct obstack pending_block_obstack
;
168 /* List of blocks already made (lexical contexts already closed).
169 This is used at the end to make the blockvector. */
173 struct pending_block
*next
;
177 /* Pointer to the head of a linked list of symbol blocks which have
178 already been finalized (lexical contexts already closed) and which
179 are just waiting to be built into a blockvector when finalizing the
180 associated symtab. */
182 static struct pending_block
*pending_blocks
;
186 struct subfile_stack
*next
;
190 static struct subfile_stack
*subfile_stack
;
192 /* The macro table for the compilation unit whose symbols we're
193 currently reading. */
194 static struct macro_table
*pending_macros
;
196 static void free_buildsym_compunit (void);
198 static int compare_line_numbers (const void *ln1p
, const void *ln2p
);
200 static void record_pending_block (struct objfile
*objfile
,
202 struct pending_block
*opblock
);
204 /* Initial sizes of data structures. These are realloc'd larger if
205 needed, and realloc'd down to the size actually used, when
208 #define INITIAL_CONTEXT_STACK_SIZE 10
209 #define INITIAL_LINE_VECTOR_LENGTH 1000
212 /* Maintain the lists of symbols and blocks. */
214 /* Add a symbol to one of the lists of symbols. */
217 add_symbol_to_list (struct symbol
*symbol
, struct pending
**listhead
)
219 struct pending
*link
;
221 /* If this is an alias for another symbol, don't add it. */
222 if (symbol
->ginfo
.name
&& symbol
->ginfo
.name
[0] == '#')
225 /* We keep PENDINGSIZE symbols in each link of the list. If we
226 don't have a link with room in it, add a new link. */
227 if (*listhead
== NULL
|| (*listhead
)->nsyms
== PENDINGSIZE
)
231 link
= free_pendings
;
232 free_pendings
= link
->next
;
236 link
= XNEW (struct pending
);
239 link
->next
= *listhead
;
244 (*listhead
)->symbol
[(*listhead
)->nsyms
++] = symbol
;
247 /* Find a symbol named NAME on a LIST. NAME need not be
248 '\0'-terminated; LENGTH is the length of the name. */
251 find_symbol_in_list (struct pending
*list
, char *name
, int length
)
258 for (j
= list
->nsyms
; --j
>= 0;)
260 pp
= SYMBOL_LINKAGE_NAME (list
->symbol
[j
]);
261 if (*pp
== *name
&& strncmp (pp
, name
, length
) == 0
262 && pp
[length
] == '\0')
264 return (list
->symbol
[j
]);
272 /* At end of reading syms, or in case of quit, ensure everything associated
273 with building symtabs is freed. This is intended to be registered as a
274 cleanup before doing psymtab->symtab expansion.
276 N.B. This is *not* intended to be used when building psymtabs. Some debug
277 info readers call this anyway, which is harmless if confusing. */
280 really_free_pendings (void *dummy
)
282 struct pending
*next
, *next1
;
284 for (next
= free_pendings
; next
; next
= next1
)
287 xfree ((void *) next
);
289 free_pendings
= NULL
;
291 free_pending_blocks ();
293 for (next
= file_symbols
; next
!= NULL
; next
= next1
)
296 xfree ((void *) next
);
300 for (next
= global_symbols
; next
!= NULL
; next
= next1
)
303 xfree ((void *) next
);
305 global_symbols
= NULL
;
308 free_macro_table (pending_macros
);
309 pending_macros
= NULL
;
312 obstack_free (&pending_addrmap_obstack
, NULL
);
313 pending_addrmap
= NULL
;
315 free_buildsym_compunit ();
318 /* This function is called to discard any pending blocks. */
321 free_pending_blocks (void)
323 if (pending_blocks
!= NULL
)
325 obstack_free (&pending_block_obstack
, NULL
);
326 pending_blocks
= NULL
;
330 /* Take one of the lists of symbols and make a block from it. Keep
331 the order the symbols have in the list (reversed from the input
332 file). Put the block on the list of pending blocks. */
334 static struct block
*
335 finish_block_internal (struct symbol
*symbol
,
336 struct pending
**listhead
,
337 struct pending_block
*old_blocks
,
338 const struct dynamic_prop
*static_link
,
339 CORE_ADDR start
, CORE_ADDR end
,
340 int is_global
, int expandable
)
342 struct objfile
*objfile
= buildsym_compunit
->objfile
;
343 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
344 struct pending
*next
, *next1
;
346 struct pending_block
*pblock
;
347 struct pending_block
*opblock
;
350 ? allocate_global_block (&objfile
->objfile_obstack
)
351 : allocate_block (&objfile
->objfile_obstack
));
355 BLOCK_DICT (block
) = dict_create_linear (&objfile
->objfile_obstack
,
362 BLOCK_DICT (block
) = dict_create_hashed_expandable ();
363 dict_add_pending (BLOCK_DICT (block
), *listhead
);
368 dict_create_hashed (&objfile
->objfile_obstack
, *listhead
);
372 BLOCK_START (block
) = start
;
373 BLOCK_END (block
) = end
;
375 /* Put the block in as the value of the symbol that names it. */
379 struct type
*ftype
= SYMBOL_TYPE (symbol
);
380 struct dict_iterator iter
;
381 SYMBOL_BLOCK_VALUE (symbol
) = block
;
382 BLOCK_FUNCTION (block
) = symbol
;
384 if (TYPE_NFIELDS (ftype
) <= 0)
386 /* No parameter type information is recorded with the
387 function's type. Set that from the type of the
388 parameter symbols. */
389 int nparams
= 0, iparams
;
392 /* Here we want to directly access the dictionary, because
393 we haven't fully initialized the block yet. */
394 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
396 if (SYMBOL_IS_ARGUMENT (sym
))
401 TYPE_NFIELDS (ftype
) = nparams
;
402 TYPE_FIELDS (ftype
) = (struct field
*)
403 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
406 /* Here we want to directly access the dictionary, because
407 we haven't fully initialized the block yet. */
408 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
410 if (iparams
== nparams
)
413 if (SYMBOL_IS_ARGUMENT (sym
))
415 TYPE_FIELD_TYPE (ftype
, iparams
) = SYMBOL_TYPE (sym
);
416 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
425 BLOCK_FUNCTION (block
) = NULL
;
428 if (static_link
!= NULL
)
429 objfile_register_static_link (objfile
, block
, static_link
);
431 /* Now "free" the links of the list, and empty the list. */
433 for (next
= *listhead
; next
; next
= next1
)
436 next
->next
= free_pendings
;
437 free_pendings
= next
;
441 /* Check to be sure that the blocks have an end address that is
442 greater than starting address. */
444 if (BLOCK_END (block
) < BLOCK_START (block
))
448 complaint (&symfile_complaints
,
449 _("block end address less than block "
450 "start address in %s (patched it)"),
451 SYMBOL_PRINT_NAME (symbol
));
455 complaint (&symfile_complaints
,
456 _("block end address %s less than block "
457 "start address %s (patched it)"),
458 paddress (gdbarch
, BLOCK_END (block
)),
459 paddress (gdbarch
, BLOCK_START (block
)));
461 /* Better than nothing. */
462 BLOCK_END (block
) = BLOCK_START (block
);
465 /* Install this block as the superblock of all blocks made since the
466 start of this scope that don't have superblocks yet. */
469 for (pblock
= pending_blocks
;
470 pblock
&& pblock
!= old_blocks
;
471 pblock
= pblock
->next
)
473 if (BLOCK_SUPERBLOCK (pblock
->block
) == NULL
)
475 /* Check to be sure the blocks are nested as we receive
476 them. If the compiler/assembler/linker work, this just
477 burns a small amount of time.
479 Skip blocks which correspond to a function; they're not
480 physically nested inside this other blocks, only
482 if (BLOCK_FUNCTION (pblock
->block
) == NULL
483 && (BLOCK_START (pblock
->block
) < BLOCK_START (block
)
484 || BLOCK_END (pblock
->block
) > BLOCK_END (block
)))
488 complaint (&symfile_complaints
,
489 _("inner block not inside outer block in %s"),
490 SYMBOL_PRINT_NAME (symbol
));
494 complaint (&symfile_complaints
,
495 _("inner block (%s-%s) not "
496 "inside outer block (%s-%s)"),
497 paddress (gdbarch
, BLOCK_START (pblock
->block
)),
498 paddress (gdbarch
, BLOCK_END (pblock
->block
)),
499 paddress (gdbarch
, BLOCK_START (block
)),
500 paddress (gdbarch
, BLOCK_END (block
)));
502 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
))
503 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
504 if (BLOCK_END (pblock
->block
) > BLOCK_END (block
))
505 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
507 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
512 block_set_using (block
,
514 ? global_using_directives
515 : local_using_directives
),
516 &objfile
->objfile_obstack
);
518 global_using_directives
= NULL
;
520 local_using_directives
= NULL
;
522 record_pending_block (objfile
, block
, opblock
);
528 finish_block (struct symbol
*symbol
,
529 struct pending
**listhead
,
530 struct pending_block
*old_blocks
,
531 const struct dynamic_prop
*static_link
,
532 CORE_ADDR start
, CORE_ADDR end
)
534 return finish_block_internal (symbol
, listhead
, old_blocks
, static_link
,
538 /* Record BLOCK on the list of all blocks in the file. Put it after
539 OPBLOCK, or at the beginning if opblock is NULL. This puts the
540 block in the list after all its subblocks.
542 Allocate the pending block struct in the objfile_obstack to save
543 time. This wastes a little space. FIXME: Is it worth it? */
546 record_pending_block (struct objfile
*objfile
, struct block
*block
,
547 struct pending_block
*opblock
)
549 struct pending_block
*pblock
;
551 if (pending_blocks
== NULL
)
552 obstack_init (&pending_block_obstack
);
554 pblock
= XOBNEW (&pending_block_obstack
, struct pending_block
);
555 pblock
->block
= block
;
558 pblock
->next
= opblock
->next
;
559 opblock
->next
= pblock
;
563 pblock
->next
= pending_blocks
;
564 pending_blocks
= pblock
;
569 /* Record that the range of addresses from START to END_INCLUSIVE
570 (inclusive, like it says) belongs to BLOCK. BLOCK's start and end
571 addresses must be set already. You must apply this function to all
572 BLOCK's children before applying it to BLOCK.
574 If a call to this function complicates the picture beyond that
575 already provided by BLOCK_START and BLOCK_END, then we create an
576 address map for the block. */
578 record_block_range (struct block
*block
,
579 CORE_ADDR start
, CORE_ADDR end_inclusive
)
581 /* If this is any different from the range recorded in the block's
582 own BLOCK_START and BLOCK_END, then note that the address map has
583 become interesting. Note that even if this block doesn't have
584 any "interesting" ranges, some later block might, so we still
585 need to record this block in the addrmap. */
586 if (start
!= BLOCK_START (block
)
587 || end_inclusive
+ 1 != BLOCK_END (block
))
588 pending_addrmap_interesting
= 1;
590 if (! pending_addrmap
)
592 obstack_init (&pending_addrmap_obstack
);
593 pending_addrmap
= addrmap_create_mutable (&pending_addrmap_obstack
);
596 addrmap_set_empty (pending_addrmap
, start
, end_inclusive
, block
);
599 static struct blockvector
*
600 make_blockvector (void)
602 struct objfile
*objfile
= buildsym_compunit
->objfile
;
603 struct pending_block
*next
;
604 struct blockvector
*blockvector
;
607 /* Count the length of the list of blocks. */
609 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++)
613 blockvector
= (struct blockvector
*)
614 obstack_alloc (&objfile
->objfile_obstack
,
615 (sizeof (struct blockvector
)
616 + (i
- 1) * sizeof (struct block
*)));
618 /* Copy the blocks into the blockvector. This is done in reverse
619 order, which happens to put the blocks into the proper order
620 (ascending starting address). finish_block has hair to insert
621 each block into the list after its subblocks in order to make
622 sure this is true. */
624 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
625 for (next
= pending_blocks
; next
; next
= next
->next
)
627 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
630 free_pending_blocks ();
632 /* If we needed an address map for this symtab, record it in the
634 if (pending_addrmap
&& pending_addrmap_interesting
)
635 BLOCKVECTOR_MAP (blockvector
)
636 = addrmap_create_fixed (pending_addrmap
, &objfile
->objfile_obstack
);
638 BLOCKVECTOR_MAP (blockvector
) = 0;
640 /* Some compilers output blocks in the wrong order, but we depend on
641 their being in the right order so we can binary search. Check the
642 order and moan about it.
643 Note: Remember that the first two blocks are the global and static
644 blocks. We could special case that fact and begin checking at block 2.
645 To avoid making that assumption we do not. */
646 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
648 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++)
650 if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
- 1))
651 > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
)))
654 = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector
, i
));
656 complaint (&symfile_complaints
, _("block at %s out of order"),
657 hex_string ((LONGEST
) start
));
662 return (blockvector
);
665 /* Start recording information about source code that came from an
666 included (or otherwise merged-in) source file with a different
667 name. NAME is the name of the file (cannot be NULL). */
670 start_subfile (const char *name
)
672 const char *subfile_dirname
;
673 struct subfile
*subfile
;
675 gdb_assert (buildsym_compunit
!= NULL
);
677 subfile_dirname
= buildsym_compunit
->comp_dir
;
679 /* See if this subfile is already registered. */
681 for (subfile
= buildsym_compunit
->subfiles
; subfile
; subfile
= subfile
->next
)
685 /* If NAME is an absolute path, and this subfile is not, then
686 attempt to create an absolute path to compare. */
687 if (IS_ABSOLUTE_PATH (name
)
688 && !IS_ABSOLUTE_PATH (subfile
->name
)
689 && subfile_dirname
!= NULL
)
690 subfile_name
= concat (subfile_dirname
, SLASH_STRING
,
691 subfile
->name
, (char *) NULL
);
693 subfile_name
= subfile
->name
;
695 if (FILENAME_CMP (subfile_name
, name
) == 0)
697 current_subfile
= subfile
;
698 if (subfile_name
!= subfile
->name
)
699 xfree (subfile_name
);
702 if (subfile_name
!= subfile
->name
)
703 xfree (subfile_name
);
706 /* This subfile is not known. Add an entry for it. */
708 subfile
= XNEW (struct subfile
);
709 memset (subfile
, 0, sizeof (struct subfile
));
710 subfile
->buildsym_compunit
= buildsym_compunit
;
712 subfile
->next
= buildsym_compunit
->subfiles
;
713 buildsym_compunit
->subfiles
= subfile
;
715 current_subfile
= subfile
;
717 subfile
->name
= xstrdup (name
);
719 /* Initialize line-number recording for this subfile. */
720 subfile
->line_vector
= NULL
;
722 /* Default the source language to whatever can be deduced from the
723 filename. If nothing can be deduced (such as for a C/C++ include
724 file with a ".h" extension), then inherit whatever language the
725 previous subfile had. This kludgery is necessary because there
726 is no standard way in some object formats to record the source
727 language. Also, when symtabs are allocated we try to deduce a
728 language then as well, but it is too late for us to use that
729 information while reading symbols, since symtabs aren't allocated
730 until after all the symbols have been processed for a given
733 subfile
->language
= deduce_language_from_filename (subfile
->name
);
734 if (subfile
->language
== language_unknown
735 && subfile
->next
!= NULL
)
737 subfile
->language
= subfile
->next
->language
;
740 /* If the filename of this subfile ends in .C, then change the
741 language of any pending subfiles from C to C++. We also accept
742 any other C++ suffixes accepted by deduce_language_from_filename. */
743 /* Likewise for f2c. */
748 enum language sublang
= deduce_language_from_filename (subfile
->name
);
750 if (sublang
== language_cplus
|| sublang
== language_fortran
)
751 for (s
= buildsym_compunit
->subfiles
; s
!= NULL
; s
= s
->next
)
752 if (s
->language
== language_c
)
753 s
->language
= sublang
;
756 /* And patch up this file if necessary. */
757 if (subfile
->language
== language_c
758 && subfile
->next
!= NULL
759 && (subfile
->next
->language
== language_cplus
760 || subfile
->next
->language
== language_fortran
))
762 subfile
->language
= subfile
->next
->language
;
766 /* Start recording information about a primary source file (IOW, not an
767 included source file).
768 COMP_DIR is the directory in which the compilation unit was compiled
769 (or NULL if not known). */
771 static struct buildsym_compunit
*
772 start_buildsym_compunit (struct objfile
*objfile
, const char *comp_dir
)
774 struct buildsym_compunit
*bscu
;
776 bscu
= XNEW (struct buildsym_compunit
);
777 memset (bscu
, 0, sizeof (struct buildsym_compunit
));
779 bscu
->objfile
= objfile
;
780 bscu
->comp_dir
= (comp_dir
== NULL
) ? NULL
: xstrdup (comp_dir
);
782 /* Initialize the debug format string to NULL. We may supply it
783 later via a call to record_debugformat. */
784 bscu
->debugformat
= NULL
;
786 /* Similarly for the producer. */
787 bscu
->producer
= NULL
;
792 /* Delete the buildsym compunit. */
795 free_buildsym_compunit (void)
797 struct subfile
*subfile
, *nextsub
;
799 if (buildsym_compunit
== NULL
)
801 for (subfile
= buildsym_compunit
->subfiles
;
805 nextsub
= subfile
->next
;
806 xfree (subfile
->name
);
807 xfree (subfile
->line_vector
);
810 xfree (buildsym_compunit
->comp_dir
);
811 xfree (buildsym_compunit
);
812 buildsym_compunit
= NULL
;
813 current_subfile
= NULL
;
816 /* For stabs readers, the first N_SO symbol is assumed to be the
817 source file name, and the subfile struct is initialized using that
818 assumption. If another N_SO symbol is later seen, immediately
819 following the first one, then the first one is assumed to be the
820 directory name and the second one is really the source file name.
822 So we have to patch up the subfile struct by moving the old name
823 value to dirname and remembering the new name. Some sanity
824 checking is performed to ensure that the state of the subfile
825 struct is reasonable and that the old name we are assuming to be a
826 directory name actually is (by checking for a trailing '/'). */
829 patch_subfile_names (struct subfile
*subfile
, const char *name
)
832 && buildsym_compunit
->comp_dir
== NULL
833 && subfile
->name
!= NULL
834 && IS_DIR_SEPARATOR (subfile
->name
[strlen (subfile
->name
) - 1]))
836 buildsym_compunit
->comp_dir
= subfile
->name
;
837 subfile
->name
= xstrdup (name
);
838 set_last_source_file (name
);
840 /* Default the source language to whatever can be deduced from
841 the filename. If nothing can be deduced (such as for a C/C++
842 include file with a ".h" extension), then inherit whatever
843 language the previous subfile had. This kludgery is
844 necessary because there is no standard way in some object
845 formats to record the source language. Also, when symtabs
846 are allocated we try to deduce a language then as well, but
847 it is too late for us to use that information while reading
848 symbols, since symtabs aren't allocated until after all the
849 symbols have been processed for a given source file. */
851 subfile
->language
= deduce_language_from_filename (subfile
->name
);
852 if (subfile
->language
== language_unknown
853 && subfile
->next
!= NULL
)
855 subfile
->language
= subfile
->next
->language
;
860 /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for
861 switching source files (different subfiles, as we call them) within
862 one object file, but using a stack rather than in an arbitrary
868 struct subfile_stack
*tem
= XNEW (struct subfile_stack
);
870 tem
->next
= subfile_stack
;
872 if (current_subfile
== NULL
|| current_subfile
->name
== NULL
)
874 internal_error (__FILE__
, __LINE__
,
875 _("failed internal consistency check"));
877 tem
->name
= current_subfile
->name
;
884 struct subfile_stack
*link
= subfile_stack
;
888 internal_error (__FILE__
, __LINE__
,
889 _("failed internal consistency check"));
892 subfile_stack
= link
->next
;
893 xfree ((void *) link
);
897 /* Add a linetable entry for line number LINE and address PC to the
898 line vector for SUBFILE. */
901 record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
903 struct linetable_entry
*e
;
905 /* Ignore the dummy line number in libg.o */
911 /* Make sure line vector exists and is big enough. */
912 if (!subfile
->line_vector
)
914 subfile
->line_vector_length
= INITIAL_LINE_VECTOR_LENGTH
;
915 subfile
->line_vector
= (struct linetable
*)
916 xmalloc (sizeof (struct linetable
)
917 + subfile
->line_vector_length
* sizeof (struct linetable_entry
));
918 subfile
->line_vector
->nitems
= 0;
919 have_line_numbers
= 1;
922 if (subfile
->line_vector
->nitems
+ 1 >= subfile
->line_vector_length
)
924 subfile
->line_vector_length
*= 2;
925 subfile
->line_vector
= (struct linetable
*)
926 xrealloc ((char *) subfile
->line_vector
,
927 (sizeof (struct linetable
)
928 + (subfile
->line_vector_length
929 * sizeof (struct linetable_entry
))));
932 /* Normally, we treat lines as unsorted. But the end of sequence
933 marker is special. We sort line markers at the same PC by line
934 number, so end of sequence markers (which have line == 0) appear
935 first. This is right if the marker ends the previous function,
936 and there is no padding before the next function. But it is
937 wrong if the previous line was empty and we are now marking a
938 switch to a different subfile. We must leave the end of sequence
939 marker at the end of this group of lines, not sort the empty line
940 to after the marker. The easiest way to accomplish this is to
941 delete any empty lines from our table, if they are followed by
942 end of sequence markers. All we lose is the ability to set
943 breakpoints at some lines which contain no instructions
945 if (line
== 0 && subfile
->line_vector
->nitems
> 0)
947 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
- 1;
948 while (subfile
->line_vector
->nitems
> 0 && e
->pc
== pc
)
951 subfile
->line_vector
->nitems
--;
955 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
++;
960 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
963 compare_line_numbers (const void *ln1p
, const void *ln2p
)
965 struct linetable_entry
*ln1
= (struct linetable_entry
*) ln1p
;
966 struct linetable_entry
*ln2
= (struct linetable_entry
*) ln2p
;
968 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
969 Please keep it that way. */
970 if (ln1
->pc
< ln2
->pc
)
973 if (ln1
->pc
> ln2
->pc
)
976 /* If pc equal, sort by line. I'm not sure whether this is optimum
977 behavior (see comment at struct linetable in symtab.h). */
978 return ln1
->line
- ln2
->line
;
981 /* See buildsym.h. */
983 struct compunit_symtab
*
984 buildsym_compunit_symtab (void)
986 gdb_assert (buildsym_compunit
!= NULL
);
988 return buildsym_compunit
->compunit_symtab
;
991 /* See buildsym.h. */
994 get_macro_table (void)
996 struct objfile
*objfile
;
998 gdb_assert (buildsym_compunit
!= NULL
);
1000 objfile
= buildsym_compunit
->objfile
;
1002 if (! pending_macros
)
1004 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
1005 objfile
->per_bfd
->macro_cache
,
1006 buildsym_compunit
->compunit_symtab
);
1009 return pending_macros
;
1012 /* Init state to prepare for building a symtab.
1013 Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c
1014 can call start_symtab+end_symtab multiple times after one call to
1018 prepare_for_building (const char *name
, CORE_ADDR start_addr
)
1020 set_last_source_file (name
);
1021 last_source_start_addr
= start_addr
;
1023 local_symbols
= NULL
;
1024 local_using_directives
= NULL
;
1025 within_function
= 0;
1026 have_line_numbers
= 0;
1028 context_stack_depth
= 0;
1030 /* These should have been reset either by successful completion of building
1031 a symtab, or by the really_free_pendings cleanup. */
1032 gdb_assert (file_symbols
== NULL
);
1033 gdb_assert (global_symbols
== NULL
);
1034 gdb_assert (global_using_directives
== NULL
);
1035 gdb_assert (pending_macros
== NULL
);
1036 gdb_assert (pending_addrmap
== NULL
);
1037 gdb_assert (current_subfile
== NULL
);
1040 /* Start a new symtab for a new source file in OBJFILE. Called, for example,
1041 when a stabs symbol of type N_SO is seen, or when a DWARF
1042 TAG_compile_unit DIE is seen. It indicates the start of data for
1043 one original source file.
1045 NAME is the name of the file (cannot be NULL). COMP_DIR is the directory in
1046 which the file was compiled (or NULL if not known). START_ADDR is the
1047 lowest address of objects in the file (or 0 if not known). */
1049 struct compunit_symtab
*
1050 start_symtab (struct objfile
*objfile
, const char *name
, const char *comp_dir
,
1051 CORE_ADDR start_addr
)
1053 prepare_for_building (name
, start_addr
);
1055 buildsym_compunit
= start_buildsym_compunit (objfile
, comp_dir
);
1057 /* Allocate the compunit symtab now. The caller needs it to allocate
1058 non-primary symtabs. It is also needed by get_macro_table. */
1059 buildsym_compunit
->compunit_symtab
= allocate_compunit_symtab (objfile
,
1062 /* Build the subfile for NAME (the main source file) so that we can record
1063 a pointer to it for later.
1064 IMPORTANT: Do not allocate a struct symtab for NAME here.
1065 It can happen that the debug info provides a different path to NAME than
1066 DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but
1067 that only works if the main_subfile doesn't have a symtab yet. */
1068 start_subfile (name
);
1069 /* Save this so that we don't have to go looking for it at the end
1070 of the subfiles list. */
1071 buildsym_compunit
->main_subfile
= current_subfile
;
1073 return buildsym_compunit
->compunit_symtab
;
1076 /* Restart compilation for a symtab.
1077 CUST is the result of end_expandable_symtab.
1078 NAME, START_ADDR are the source file we are resuming with.
1080 This is used when a symtab is built from multiple sources.
1081 The symtab is first built with start_symtab/end_expandable_symtab
1082 and then for each additional piece call restart_symtab/augment_*_symtab.
1083 Note: At the moment there is only augment_type_symtab. */
1086 restart_symtab (struct compunit_symtab
*cust
,
1087 const char *name
, CORE_ADDR start_addr
)
1089 prepare_for_building (name
, start_addr
);
1091 buildsym_compunit
= start_buildsym_compunit (COMPUNIT_OBJFILE (cust
),
1092 COMPUNIT_DIRNAME (cust
));
1093 buildsym_compunit
->compunit_symtab
= cust
;
1096 /* Subroutine of end_symtab to simplify it. Look for a subfile that
1097 matches the main source file's basename. If there is only one, and
1098 if the main source file doesn't have any symbol or line number
1099 information, then copy this file's symtab and line_vector to the
1100 main source file's subfile and discard the other subfile. This can
1101 happen because of a compiler bug or from the user playing games
1102 with #line or from things like a distributed build system that
1103 manipulates the debug info. This can also happen from an innocent
1104 symlink in the paths, we don't canonicalize paths here. */
1107 watch_main_source_file_lossage (void)
1109 struct subfile
*mainsub
, *subfile
;
1111 /* We have to watch for buildsym_compunit == NULL here. It's a quirk of
1112 end_symtab, it can return NULL so there may not be a main subfile. */
1113 if (buildsym_compunit
== NULL
)
1116 /* Get the main source file. */
1117 mainsub
= buildsym_compunit
->main_subfile
;
1119 /* If the main source file doesn't have any line number or symbol
1120 info, look for an alias in another subfile. */
1122 if (mainsub
->line_vector
== NULL
1123 && mainsub
->symtab
== NULL
)
1125 const char *mainbase
= lbasename (mainsub
->name
);
1127 struct subfile
*prevsub
;
1128 struct subfile
*mainsub_alias
= NULL
;
1129 struct subfile
*prev_mainsub_alias
= NULL
;
1132 for (subfile
= buildsym_compunit
->subfiles
;
1134 subfile
= subfile
->next
)
1136 if (subfile
== mainsub
)
1138 if (filename_cmp (lbasename (subfile
->name
), mainbase
) == 0)
1141 mainsub_alias
= subfile
;
1142 prev_mainsub_alias
= prevsub
;
1147 if (nr_matches
== 1)
1149 gdb_assert (mainsub_alias
!= NULL
&& mainsub_alias
!= mainsub
);
1151 /* Found a match for the main source file.
1152 Copy its line_vector and symtab to the main subfile
1153 and then discard it. */
1155 mainsub
->line_vector
= mainsub_alias
->line_vector
;
1156 mainsub
->line_vector_length
= mainsub_alias
->line_vector_length
;
1157 mainsub
->symtab
= mainsub_alias
->symtab
;
1159 if (prev_mainsub_alias
== NULL
)
1160 buildsym_compunit
->subfiles
= mainsub_alias
->next
;
1162 prev_mainsub_alias
->next
= mainsub_alias
->next
;
1163 xfree (mainsub_alias
->name
);
1164 xfree (mainsub_alias
);
1169 /* Reset state after a successful building of a symtab.
1170 This exists because dbxread.c and xcoffread.c can call
1171 start_symtab+end_symtab multiple times after one call to buildsym_init,
1172 and before the really_free_pendings cleanup is called.
1173 We keep the free_pendings list around for dbx/xcoff sake. */
1176 reset_symtab_globals (void)
1178 set_last_source_file (NULL
);
1180 local_symbols
= NULL
;
1181 local_using_directives
= NULL
;
1182 file_symbols
= NULL
;
1183 global_symbols
= NULL
;
1184 global_using_directives
= NULL
;
1186 /* We don't free pending_macros here because if the symtab was successfully
1187 built then ownership was transferred to the symtab. */
1188 pending_macros
= NULL
;
1190 if (pending_addrmap
)
1191 obstack_free (&pending_addrmap_obstack
, NULL
);
1192 pending_addrmap
= NULL
;
1194 free_buildsym_compunit ();
1197 /* Implementation of the first part of end_symtab. It allows modifying
1198 STATIC_BLOCK before it gets finalized by end_symtab_from_static_block.
1199 If the returned value is NULL there is no blockvector created for
1200 this symtab (you still must call end_symtab_from_static_block).
1202 END_ADDR is the same as for end_symtab: the address of the end of the
1205 If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
1208 If REQUIRED is non-zero, then a symtab is created even if it does
1209 not contain any symbols. */
1212 end_symtab_get_static_block (CORE_ADDR end_addr
, int expandable
, int required
)
1214 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1216 /* Finish the lexical context of the last function in the file; pop
1217 the context stack. */
1219 if (context_stack_depth
> 0)
1221 struct context_stack
*cstk
= pop_context ();
1223 /* Make a block for the local symbols within. */
1224 finish_block (cstk
->name
, &local_symbols
, cstk
->old_blocks
, NULL
,
1225 cstk
->start_addr
, end_addr
);
1227 if (context_stack_depth
> 0)
1229 /* This is said to happen with SCO. The old coffread.c
1230 code simply emptied the context stack, so we do the
1231 same. FIXME: Find out why it is happening. This is not
1232 believed to happen in most cases (even for coffread.c);
1233 it used to be an abort(). */
1234 complaint (&symfile_complaints
,
1235 _("Context stack not empty in end_symtab"));
1236 context_stack_depth
= 0;
1240 /* Reordered executables may have out of order pending blocks; if
1241 OBJF_REORDERED is true, then sort the pending blocks. */
1243 if ((objfile
->flags
& OBJF_REORDERED
) && pending_blocks
)
1245 struct pending_block
*pb
;
1247 std::vector
<block
*> barray
;
1249 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1250 barray
.push_back (pb
->block
);
1252 std::sort (barray
.begin (), barray
.end (),
1253 [] (const block
*a
, const block
*b
)
1255 /* Sort blocks in descending order. */
1256 return BLOCK_START (a
) > BLOCK_START (b
);
1260 for (pb
= pending_blocks
; pb
!= NULL
; pb
= pb
->next
)
1261 pb
->block
= barray
[i
++];
1264 /* Cleanup any undefined types that have been left hanging around
1265 (this needs to be done before the finish_blocks so that
1266 file_symbols is still good).
1268 Both cleanup_undefined_stabs_types and finish_global_stabs are stabs
1269 specific, but harmless for other symbol readers, since on gdb
1270 startup or when finished reading stabs, the state is set so these
1271 are no-ops. FIXME: Is this handled right in case of QUIT? Can
1272 we make this cleaner? */
1274 cleanup_undefined_stabs_types (objfile
);
1275 finish_global_stabs (objfile
);
1278 && pending_blocks
== NULL
1279 && file_symbols
== NULL
1280 && global_symbols
== NULL
1281 && have_line_numbers
== 0
1282 && pending_macros
== NULL
1283 && global_using_directives
== NULL
)
1285 /* Ignore symtabs that have no functions with real debugging info. */
1290 /* Define the STATIC_BLOCK. */
1291 return finish_block_internal (NULL
, &file_symbols
, NULL
, NULL
,
1292 last_source_start_addr
, end_addr
,
1297 /* Subroutine of end_symtab_from_static_block to simplify it.
1298 Handle the "have blockvector" case.
1299 See end_symtab_from_static_block for a description of the arguments. */
1301 static struct compunit_symtab
*
1302 end_symtab_with_blockvector (struct block
*static_block
,
1303 int section
, int expandable
)
1305 struct objfile
*objfile
= buildsym_compunit
->objfile
;
1306 struct compunit_symtab
*cu
= buildsym_compunit
->compunit_symtab
;
1307 struct symtab
*symtab
;
1308 struct blockvector
*blockvector
;
1309 struct subfile
*subfile
;
1312 gdb_assert (static_block
!= NULL
);
1313 gdb_assert (buildsym_compunit
!= NULL
);
1314 gdb_assert (buildsym_compunit
->subfiles
!= NULL
);
1316 end_addr
= BLOCK_END (static_block
);
1318 /* Create the GLOBAL_BLOCK and build the blockvector. */
1319 finish_block_internal (NULL
, &global_symbols
, NULL
, NULL
,
1320 last_source_start_addr
, end_addr
,
1322 blockvector
= make_blockvector ();
1324 /* Read the line table if it has to be read separately.
1325 This is only used by xcoffread.c. */
1326 if (objfile
->sf
->sym_read_linetable
!= NULL
)
1327 objfile
->sf
->sym_read_linetable (objfile
);
1329 /* Handle the case where the debug info specifies a different path
1330 for the main source file. It can cause us to lose track of its
1331 line number information. */
1332 watch_main_source_file_lossage ();
1334 /* Now create the symtab objects proper, if not already done,
1335 one for each subfile. */
1337 for (subfile
= buildsym_compunit
->subfiles
;
1339 subfile
= subfile
->next
)
1341 int linetablesize
= 0;
1343 if (subfile
->line_vector
)
1345 linetablesize
= sizeof (struct linetable
) +
1346 subfile
->line_vector
->nitems
* sizeof (struct linetable_entry
);
1348 /* Like the pending blocks, the line table may be
1349 scrambled in reordered executables. Sort it if
1350 OBJF_REORDERED is true. */
1351 if (objfile
->flags
& OBJF_REORDERED
)
1352 qsort (subfile
->line_vector
->item
,
1353 subfile
->line_vector
->nitems
,
1354 sizeof (struct linetable_entry
), compare_line_numbers
);
1357 /* Allocate a symbol table if necessary. */
1358 if (subfile
->symtab
== NULL
)
1359 subfile
->symtab
= allocate_symtab (cu
, subfile
->name
);
1360 symtab
= subfile
->symtab
;
1362 /* Fill in its components. */
1364 if (subfile
->line_vector
)
1366 /* Reallocate the line table on the symbol obstack. */
1367 SYMTAB_LINETABLE (symtab
) = (struct linetable
*)
1368 obstack_alloc (&objfile
->objfile_obstack
, linetablesize
);
1369 memcpy (SYMTAB_LINETABLE (symtab
), subfile
->line_vector
,
1374 SYMTAB_LINETABLE (symtab
) = NULL
;
1377 /* Use whatever language we have been using for this
1378 subfile, not the one that was deduced in allocate_symtab
1379 from the filename. We already did our own deducing when
1380 we created the subfile, and we may have altered our
1381 opinion of what language it is from things we found in
1383 symtab
->language
= subfile
->language
;
1386 /* Make sure the symtab of main_subfile is the first in its list. */
1388 struct symtab
*main_symtab
, *prev_symtab
;
1390 main_symtab
= buildsym_compunit
->main_subfile
->symtab
;
1392 ALL_COMPUNIT_FILETABS (cu
, symtab
)
1394 if (symtab
== main_symtab
)
1396 if (prev_symtab
!= NULL
)
1398 prev_symtab
->next
= main_symtab
->next
;
1399 main_symtab
->next
= COMPUNIT_FILETABS (cu
);
1400 COMPUNIT_FILETABS (cu
) = main_symtab
;
1404 prev_symtab
= symtab
;
1406 gdb_assert (main_symtab
== COMPUNIT_FILETABS (cu
));
1409 /* Fill out the compunit symtab. */
1411 if (buildsym_compunit
->comp_dir
!= NULL
)
1413 /* Reallocate the dirname on the symbol obstack. */
1414 COMPUNIT_DIRNAME (cu
)
1415 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
1416 buildsym_compunit
->comp_dir
,
1417 strlen (buildsym_compunit
->comp_dir
));
1420 /* Save the debug format string (if any) in the symtab. */
1421 COMPUNIT_DEBUGFORMAT (cu
) = buildsym_compunit
->debugformat
;
1423 /* Similarly for the producer. */
1424 COMPUNIT_PRODUCER (cu
) = buildsym_compunit
->producer
;
1426 COMPUNIT_BLOCKVECTOR (cu
) = blockvector
;
1428 struct block
*b
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1430 set_block_compunit_symtab (b
, cu
);
1433 COMPUNIT_BLOCK_LINE_SECTION (cu
) = section
;
1435 COMPUNIT_MACRO_TABLE (cu
) = pending_macros
;
1437 /* Default any symbols without a specified symtab to the primary symtab. */
1441 /* The main source file's symtab. */
1442 symtab
= COMPUNIT_FILETABS (cu
);
1444 for (block_i
= 0; block_i
< BLOCKVECTOR_NBLOCKS (blockvector
); block_i
++)
1446 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, block_i
);
1448 struct dict_iterator iter
;
1450 /* Inlined functions may have symbols not in the global or
1451 static symbol lists. */
1452 if (BLOCK_FUNCTION (block
) != NULL
)
1453 if (symbol_symtab (BLOCK_FUNCTION (block
)) == NULL
)
1454 symbol_set_symtab (BLOCK_FUNCTION (block
), symtab
);
1456 /* Note that we only want to fix up symbols from the local
1457 blocks, not blocks coming from included symtabs. That is why
1458 we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
1459 ALL_DICT_SYMBOLS (BLOCK_DICT (block
), iter
, sym
)
1460 if (symbol_symtab (sym
) == NULL
)
1461 symbol_set_symtab (sym
, symtab
);
1465 add_compunit_symtab_to_objfile (cu
);
1470 /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
1471 as value returned by end_symtab_get_static_block.
1473 SECTION is the same as for end_symtab: the section number
1474 (in objfile->section_offsets) of the blockvector and linetable.
1476 If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
1479 struct compunit_symtab
*
1480 end_symtab_from_static_block (struct block
*static_block
,
1481 int section
, int expandable
)
1483 struct compunit_symtab
*cu
;
1485 if (static_block
== NULL
)
1487 /* Handle the "no blockvector" case.
1488 When this happens there is nothing to record, so there's nothing
1489 to do: memory will be freed up later.
1491 Note: We won't be adding a compunit to the objfile's list of
1492 compunits, so there's nothing to unchain. However, since each symtab
1493 is added to the objfile's obstack we can't free that space.
1494 We could do better, but this is believed to be a sufficiently rare
1499 cu
= end_symtab_with_blockvector (static_block
, section
, expandable
);
1501 reset_symtab_globals ();
1506 /* Finish the symbol definitions for one main source file, close off
1507 all the lexical contexts for that file (creating struct block's for
1508 them), then make the struct symtab for that file and put it in the
1511 END_ADDR is the address of the end of the file's text. SECTION is
1512 the section number (in objfile->section_offsets) of the blockvector
1515 Note that it is possible for end_symtab() to return NULL. In
1516 particular, for the DWARF case at least, it will return NULL when
1517 it finds a compilation unit that has exactly one DIE, a
1518 TAG_compile_unit DIE. This can happen when we link in an object
1519 file that was compiled from an empty source file. Returning NULL
1520 is probably not the correct thing to do, because then gdb will
1521 never know about this empty file (FIXME).
1523 If you need to modify STATIC_BLOCK before it is finalized you should
1524 call end_symtab_get_static_block and end_symtab_from_static_block
1527 struct compunit_symtab
*
1528 end_symtab (CORE_ADDR end_addr
, int section
)
1530 struct block
*static_block
;
1532 static_block
= end_symtab_get_static_block (end_addr
, 0, 0);
1533 return end_symtab_from_static_block (static_block
, section
, 0);
1536 /* Same as end_symtab except create a symtab that can be later added to. */
1538 struct compunit_symtab
*
1539 end_expandable_symtab (CORE_ADDR end_addr
, int section
)
1541 struct block
*static_block
;
1543 static_block
= end_symtab_get_static_block (end_addr
, 1, 0);
1544 return end_symtab_from_static_block (static_block
, section
, 1);
1547 /* Subroutine of augment_type_symtab to simplify it.
1548 Attach the main source file's symtab to all symbols in PENDING_LIST that
1552 set_missing_symtab (struct pending
*pending_list
,
1553 struct compunit_symtab
*cu
)
1555 struct pending
*pending
;
1558 for (pending
= pending_list
; pending
!= NULL
; pending
= pending
->next
)
1560 for (i
= 0; i
< pending
->nsyms
; ++i
)
1562 if (symbol_symtab (pending
->symbol
[i
]) == NULL
)
1563 symbol_set_symtab (pending
->symbol
[i
], COMPUNIT_FILETABS (cu
));
1568 /* Same as end_symtab, but for the case where we're adding more symbols
1569 to an existing symtab that is known to contain only type information.
1570 This is the case for DWARF4 Type Units. */
1573 augment_type_symtab (void)
1575 struct compunit_symtab
*cust
= buildsym_compunit
->compunit_symtab
;
1576 const struct blockvector
*blockvector
= COMPUNIT_BLOCKVECTOR (cust
);
1578 if (context_stack_depth
> 0)
1580 complaint (&symfile_complaints
,
1581 _("Context stack not empty in augment_type_symtab"));
1582 context_stack_depth
= 0;
1584 if (pending_blocks
!= NULL
)
1585 complaint (&symfile_complaints
, _("Blocks in a type symtab"));
1586 if (pending_macros
!= NULL
)
1587 complaint (&symfile_complaints
, _("Macro in a type symtab"));
1588 if (have_line_numbers
)
1589 complaint (&symfile_complaints
,
1590 _("Line numbers recorded in a type symtab"));
1592 if (file_symbols
!= NULL
)
1594 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, STATIC_BLOCK
);
1596 /* First mark any symbols without a specified symtab as belonging
1597 to the primary symtab. */
1598 set_missing_symtab (file_symbols
, cust
);
1600 dict_add_pending (BLOCK_DICT (block
), file_symbols
);
1603 if (global_symbols
!= NULL
)
1605 struct block
*block
= BLOCKVECTOR_BLOCK (blockvector
, GLOBAL_BLOCK
);
1607 /* First mark any symbols without a specified symtab as belonging
1608 to the primary symtab. */
1609 set_missing_symtab (global_symbols
, cust
);
1611 dict_add_pending (BLOCK_DICT (block
), global_symbols
);
1614 reset_symtab_globals ();
1617 /* Push a context block. Args are an identifying nesting level
1618 (checkable when you pop it), and the starting PC address of this
1621 struct context_stack
*
1622 push_context (int desc
, CORE_ADDR valu
)
1624 struct context_stack
*newobj
;
1626 if (context_stack_depth
== context_stack_size
)
1628 context_stack_size
*= 2;
1629 context_stack
= (struct context_stack
*)
1630 xrealloc ((char *) context_stack
,
1631 (context_stack_size
* sizeof (struct context_stack
)));
1634 newobj
= &context_stack
[context_stack_depth
++];
1635 newobj
->depth
= desc
;
1636 newobj
->locals
= local_symbols
;
1637 newobj
->old_blocks
= pending_blocks
;
1638 newobj
->start_addr
= valu
;
1639 newobj
->local_using_directives
= local_using_directives
;
1640 newobj
->name
= NULL
;
1642 local_symbols
= NULL
;
1643 local_using_directives
= NULL
;
1648 /* Pop a context block. Returns the address of the context block just
1651 struct context_stack
*
1654 gdb_assert (context_stack_depth
> 0);
1655 return (&context_stack
[--context_stack_depth
]);
1660 /* Compute a small integer hash code for the given name. */
1663 hashname (const char *name
)
1665 return (hash(name
,strlen(name
)) % HASHSIZE
);
1670 record_debugformat (const char *format
)
1672 buildsym_compunit
->debugformat
= format
;
1676 record_producer (const char *producer
)
1678 buildsym_compunit
->producer
= producer
;
1681 /* Merge the first symbol list SRCLIST into the second symbol list
1682 TARGETLIST by repeated calls to add_symbol_to_list(). This
1683 procedure "frees" each link of SRCLIST by adding it to the
1684 free_pendings list. Caller must set SRCLIST to a null list after
1685 calling this function.
1690 merge_symbol_lists (struct pending
**srclist
, struct pending
**targetlist
)
1694 if (!srclist
|| !*srclist
)
1697 /* Merge in elements from current link. */
1698 for (i
= 0; i
< (*srclist
)->nsyms
; i
++)
1699 add_symbol_to_list ((*srclist
)->symbol
[i
], targetlist
);
1701 /* Recurse on next. */
1702 merge_symbol_lists (&(*srclist
)->next
, targetlist
);
1704 /* "Free" the current link. */
1705 (*srclist
)->next
= free_pendings
;
1706 free_pendings
= (*srclist
);
1710 /* Name of source file whose symbol data we are now processing. This
1711 comes from a symbol of type N_SO for stabs. For Dwarf it comes
1712 from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
1714 static char *last_source_file
;
1716 /* See buildsym.h. */
1719 set_last_source_file (const char *name
)
1721 xfree (last_source_file
);
1722 last_source_file
= name
== NULL
? NULL
: xstrdup (name
);
1725 /* See buildsym.h. */
1728 get_last_source_file (void)
1730 return last_source_file
;
1735 /* Initialize anything that needs initializing when starting to read a
1736 fresh piece of a symbol file, e.g. reading in the stuff
1737 corresponding to a psymtab. */
1740 buildsym_init (void)
1742 subfile_stack
= NULL
;
1744 pending_addrmap_interesting
= 0;
1746 /* Context stack is initially empty. Allocate first one with room
1747 for a few levels; reuse it forever afterward. */
1748 if (context_stack
== NULL
)
1750 context_stack_size
= INITIAL_CONTEXT_STACK_SIZE
;
1751 context_stack
= XNEWVEC (struct context_stack
, context_stack_size
);
1754 /* Ensure the really_free_pendings cleanup was called after
1756 gdb_assert (free_pendings
== NULL
);
1757 gdb_assert (pending_blocks
== NULL
);
1758 gdb_assert (file_symbols
== NULL
);
1759 gdb_assert (global_symbols
== NULL
);
1760 gdb_assert (global_using_directives
== NULL
);
1761 gdb_assert (pending_macros
== NULL
);
1762 gdb_assert (pending_addrmap
== NULL
);
1763 gdb_assert (buildsym_compunit
== NULL
);
1766 /* Initialize anything that needs initializing when a completely new
1767 symbol file is specified (not just adding some symbols from another
1768 file, e.g. a shared library). */
1771 buildsym_new_init (void)