1 /* Support routines for building symbol tables in GDB's internal format.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This module provides subroutines used for creating and adding to
22 the symbol table. These routines are called from various symbol-
23 file-reading routines.
25 Routines to support specific debugging information formats (stabs,
26 DWARF, etc) belong somewhere else. */
32 #include "symfile.h" /* Needed for "struct complaint" */
34 #include "complaints.h"
37 /* Ask buildsym.h to define the vars it normally declares `extern'. */
39 #include "buildsym.h" /* Our own declarations */
42 /* For cleanup_undefined_types and finish_global_stabs (somewhat
43 questionable--see comment where we call them). */
44 #include "stabsread.h"
47 compare_line_numbers
PARAMS ((const void *, const void *));
49 static struct blockvector
*
50 make_blockvector
PARAMS ((struct objfile
*));
53 /* Initial sizes of data structures. These are realloc'd larger if needed,
54 and realloc'd down to the size actually used, when completed. */
56 #define INITIAL_CONTEXT_STACK_SIZE 10
57 #define INITIAL_LINE_VECTOR_LENGTH 1000
60 /* Complaints about the symbols we have encountered. */
62 struct complaint innerblock_complaint
=
63 {"inner block not inside outer block in %s", 0, 0};
65 struct complaint innerblock_anon_complaint
=
66 {"inner block not inside outer block", 0, 0};
68 struct complaint blockvector_complaint
=
69 {"block at 0x%lx out of order", 0, 0};
72 /* maintain the lists of symbols and blocks */
74 /* Add a symbol to one of the lists of symbols. */
77 add_symbol_to_list (symbol
, listhead
)
78 struct symbol
*symbol
;
79 struct pending
**listhead
;
81 register struct pending
*link
;
83 /* We keep PENDINGSIZE symbols in each link of the list.
84 If we don't have a link with room in it, add a new link. */
85 if (*listhead
== NULL
|| (*listhead
)->nsyms
== PENDINGSIZE
)
90 free_pendings
= link
->next
;
94 link
= (struct pending
*) xmalloc (sizeof (struct pending
));
97 link
->next
= *listhead
;
102 (*listhead
)->symbol
[(*listhead
)->nsyms
++] = symbol
;
105 /* Find a symbol named NAME on a LIST. NAME need not be '\0'-terminated;
106 LENGTH is the length of the name. */
109 find_symbol_in_list (list
, name
, length
)
110 struct pending
*list
;
119 for (j
= list
->nsyms
; --j
>= 0; )
121 pp
= SYMBOL_NAME (list
->symbol
[j
]);
122 if (*pp
== *name
&& strncmp (pp
, name
, length
) == 0 &&
125 return (list
->symbol
[j
]);
133 /* At end of reading syms, or in case of quit,
134 really free as many `struct pending's as we can easily find. */
138 really_free_pendings (foo
)
141 struct pending
*next
, *next1
;
143 struct pending_block
*bnext
, *bnext1
;
146 for (next
= free_pendings
; next
; next
= next1
)
151 free_pendings
= NULL
;
153 #if 0 /* Now we make the links in the symbol_obstack, so don't free them. */
154 for (bnext
= pending_blocks
; bnext
; bnext
= bnext1
)
156 bnext1
= bnext
->next
;
160 pending_blocks
= NULL
;
162 for (next
= file_symbols
; next
!= NULL
; next
= next1
)
169 for (next
= global_symbols
; next
!= NULL
; next
= next1
)
174 global_symbols
= NULL
;
177 /* Take one of the lists of symbols and make a block from it.
178 Keep the order the symbols have in the list (reversed from the input file).
179 Put the block on the list of pending blocks. */
182 finish_block (symbol
, listhead
, old_blocks
, start
, end
, objfile
)
183 struct symbol
*symbol
;
184 struct pending
**listhead
;
185 struct pending_block
*old_blocks
;
186 CORE_ADDR start
, end
;
187 struct objfile
*objfile
;
189 register struct pending
*next
, *next1
;
190 register struct block
*block
;
191 register struct pending_block
*pblock
;
192 struct pending_block
*opblock
;
196 /* Count the length of the list of symbols. */
198 for (next
= *listhead
, i
= 0;
200 i
+= next
->nsyms
, next
= next
->next
)
205 block
= (struct block
*) obstack_alloc (&objfile
-> symbol_obstack
,
206 (sizeof (struct block
) + ((i
- 1) * sizeof (struct symbol
*))));
208 /* Copy the symbols into the block. */
210 BLOCK_NSYMS (block
) = i
;
211 for (next
= *listhead
; next
; next
= next
->next
)
213 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
215 BLOCK_SYM (block
, --i
) = next
->symbol
[j
];
219 BLOCK_START (block
) = start
;
220 BLOCK_END (block
) = end
;
221 /* Superblock filled in when containing block is made */
222 BLOCK_SUPERBLOCK (block
) = NULL
;
223 BLOCK_GCC_COMPILED (block
) = processing_gcc_compilation
;
225 /* Put the block in as the value of the symbol that names it. */
229 SYMBOL_BLOCK_VALUE (symbol
) = block
;
230 BLOCK_FUNCTION (block
) = symbol
;
234 BLOCK_FUNCTION (block
) = NULL
;
237 /* Now "free" the links of the list, and empty the list. */
239 for (next
= *listhead
; next
; next
= next1
)
242 next
->next
= free_pendings
;
243 free_pendings
= next
;
247 /* Install this block as the superblock
248 of all blocks made since the start of this scope
249 that don't have superblocks yet. */
252 for (pblock
= pending_blocks
; pblock
!= old_blocks
; pblock
= pblock
->next
)
254 if (BLOCK_SUPERBLOCK (pblock
->block
) == NULL
)
257 /* Check to be sure the blocks are nested as we receive them.
258 If the compiler/assembler/linker work, this just burns a small
260 if (BLOCK_START (pblock
->block
) < BLOCK_START (block
) ||
261 BLOCK_END (pblock
->block
) > BLOCK_END (block
))
265 complain (&innerblock_complaint
,
266 SYMBOL_SOURCE_NAME (symbol
));
270 complain (&innerblock_anon_complaint
);
272 BLOCK_START (pblock
->block
) = BLOCK_START (block
);
273 BLOCK_END (pblock
->block
) = BLOCK_END (block
);
276 BLOCK_SUPERBLOCK (pblock
->block
) = block
;
281 /* Record this block on the list of all blocks in the file.
282 Put it after opblock, or at the beginning if opblock is 0.
283 This puts the block in the list after all its subblocks. */
285 /* Allocate in the symbol_obstack to save time.
286 It wastes a little space. */
287 pblock
= (struct pending_block
*)
288 obstack_alloc (&objfile
-> symbol_obstack
,
289 sizeof (struct pending_block
));
290 pblock
->block
= block
;
293 pblock
->next
= opblock
->next
;
294 opblock
->next
= pblock
;
298 pblock
->next
= pending_blocks
;
299 pending_blocks
= pblock
;
303 static struct blockvector
*
304 make_blockvector (objfile
)
305 struct objfile
*objfile
;
307 register struct pending_block
*next
;
308 register struct blockvector
*blockvector
;
311 /* Count the length of the list of blocks. */
313 for (next
= pending_blocks
, i
= 0; next
; next
= next
->next
, i
++) {;}
315 blockvector
= (struct blockvector
*)
316 obstack_alloc (&objfile
-> symbol_obstack
,
317 (sizeof (struct blockvector
)
318 + (i
- 1) * sizeof (struct block
*)));
320 /* Copy the blocks into the blockvector.
321 This is done in reverse order, which happens to put
322 the blocks into the proper order (ascending starting address).
323 finish_block has hair to insert each block into the list
324 after its subblocks in order to make sure this is true. */
326 BLOCKVECTOR_NBLOCKS (blockvector
) = i
;
327 for (next
= pending_blocks
; next
; next
= next
->next
)
329 BLOCKVECTOR_BLOCK (blockvector
, --i
) = next
->block
;
332 #if 0 /* Now we make the links in the obstack, so don't free them. */
333 /* Now free the links of the list, and empty the list. */
335 for (next
= pending_blocks
; next
; next
= next1
)
341 pending_blocks
= NULL
;
343 #if 1 /* FIXME, shut this off after a while to speed up symbol reading. */
344 /* Some compilers output blocks in the wrong order, but we depend
345 on their being in the right order so we can binary search.
346 Check the order and moan about it. FIXME. */
347 if (BLOCKVECTOR_NBLOCKS (blockvector
) > 1)
349 for (i
= 1; i
< BLOCKVECTOR_NBLOCKS (blockvector
); i
++)
351 if (BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
-1))
352 > BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
)))
355 /* FIXME-32x64: loses if CORE_ADDR doesn't fit in a
356 long. Possible solutions include a version of
357 complain which takes a callback, a
358 sprintf_address_numeric to match
359 print_address_numeric, or a way to set up a GDB_FILE
360 * which causes sprintf rather than fprintf to be
363 complain (&blockvector_complaint
,
364 (unsigned long) BLOCK_START(BLOCKVECTOR_BLOCK (blockvector
, i
)));
370 return (blockvector
);
374 /* Start recording information about source code that came from an included
375 (or otherwise merged-in) source file with a different name. NAME is
376 the name of the file (cannot be NULL), DIRNAME is the directory in which
377 it resides (or NULL if not known). */
380 start_subfile (name
, dirname
)
384 register struct subfile
*subfile
;
386 /* See if this subfile is already known as a subfile of the
387 current main source file. */
389 for (subfile
= subfiles
; subfile
; subfile
= subfile
->next
)
391 if (STREQ (subfile
->name
, name
))
393 current_subfile
= subfile
;
398 /* This subfile is not known. Add an entry for it.
399 Make an entry for this subfile in the list of all subfiles
400 of the current main source file. */
402 subfile
= (struct subfile
*) xmalloc (sizeof (struct subfile
));
403 subfile
->next
= subfiles
;
405 current_subfile
= subfile
;
407 /* Save its name and compilation directory name */
408 subfile
->name
= (name
== NULL
) ? NULL
: savestring (name
, strlen (name
));
410 (dirname
== NULL
) ? NULL
: savestring (dirname
, strlen (dirname
));
412 /* Initialize line-number recording for this subfile. */
413 subfile
->line_vector
= NULL
;
415 /* Default the source language to whatever can be deduced from
416 the filename. If nothing can be deduced (such as for a C/C++
417 include file with a ".h" extension), then inherit whatever
418 language the previous subfile had. This kludgery is necessary
419 because there is no standard way in some object formats to
420 record the source language. Also, when symtabs are allocated
421 we try to deduce a language then as well, but it is too late
422 for us to use that information while reading symbols, since
423 symtabs aren't allocated until after all the symbols have
424 been processed for a given source file. */
426 subfile
->language
= deduce_language_from_filename (subfile
->name
);
427 if (subfile
->language
== language_unknown
&&
428 subfile
->next
!= NULL
)
430 subfile
->language
= subfile
->next
->language
;
433 /* cfront output is a C program, so in most ways it looks like a C
434 program. But to demangle we need to set the language to C++. We
435 can distinguish cfront code by the fact that it has #line
436 directives which specify a file name ending in .C.
438 So if the filename of this subfile ends in .C, then change the language
439 of any pending subfiles from C to C++. We also accept any other C++
440 suffixes accepted by deduce_language_from_filename (in particular,
441 some people use .cxx with cfront). */
442 /* Likewise for f2c. */
447 enum language sublang
= deduce_language_from_filename (subfile
->name
);
449 if (sublang
== language_cplus
|| sublang
== language_fortran
)
450 for (s
= subfiles
; s
!= NULL
; s
= s
->next
)
451 if (s
->language
== language_c
)
452 s
->language
= sublang
;
455 /* And patch up this file if necessary. */
456 if (subfile
->language
== language_c
457 && subfile
->next
!= NULL
458 && (subfile
->next
->language
== language_cplus
459 || subfile
->next
->language
== language_fortran
))
461 subfile
->language
= subfile
->next
->language
;
465 /* For stabs readers, the first N_SO symbol is assumed to be the source
466 file name, and the subfile struct is initialized using that assumption.
467 If another N_SO symbol is later seen, immediately following the first
468 one, then the first one is assumed to be the directory name and the
469 second one is really the source file name.
471 So we have to patch up the subfile struct by moving the old name value to
472 dirname and remembering the new name. Some sanity checking is performed
473 to ensure that the state of the subfile struct is reasonable and that the
474 old name we are assuming to be a directory name actually is (by checking
475 for a trailing '/'). */
478 patch_subfile_names (subfile
, name
)
479 struct subfile
*subfile
;
482 if (subfile
!= NULL
&& subfile
->dirname
== NULL
&& subfile
->name
!= NULL
483 && subfile
->name
[strlen(subfile
->name
)-1] == '/')
485 subfile
->dirname
= subfile
->name
;
486 subfile
->name
= savestring (name
, strlen (name
));
488 /* Default the source language to whatever can be deduced from
489 the filename. If nothing can be deduced (such as for a C/C++
490 include file with a ".h" extension), then inherit whatever
491 language the previous subfile had. This kludgery is necessary
492 because there is no standard way in some object formats to
493 record the source language. Also, when symtabs are allocated
494 we try to deduce a language then as well, but it is too late
495 for us to use that information while reading symbols, since
496 symtabs aren't allocated until after all the symbols have
497 been processed for a given source file. */
499 subfile
->language
= deduce_language_from_filename (subfile
->name
);
500 if (subfile
->language
== language_unknown
&&
501 subfile
->next
!= NULL
)
503 subfile
->language
= subfile
->next
->language
;
509 /* Handle the N_BINCL and N_EINCL symbol types
510 that act like N_SOL for switching source files
511 (different subfiles, as we call them) within one object file,
512 but using a stack rather than in an arbitrary order. */
517 register struct subfile_stack
*tem
518 = (struct subfile_stack
*) xmalloc (sizeof (struct subfile_stack
));
520 tem
->next
= subfile_stack
;
522 if (current_subfile
== NULL
|| current_subfile
->name
== NULL
)
526 tem
->name
= current_subfile
->name
;
533 register struct subfile_stack
*link
= subfile_stack
;
540 subfile_stack
= link
->next
;
546 /* Add a linetable entry for line number LINE and address PC to the line
547 vector for SUBFILE. */
550 record_line (subfile
, line
, pc
)
551 register struct subfile
*subfile
;
555 struct linetable_entry
*e
;
556 /* Ignore the dummy line number in libg.o */
563 /* Make sure line vector exists and is big enough. */
564 if (!subfile
->line_vector
)
566 subfile
->line_vector_length
= INITIAL_LINE_VECTOR_LENGTH
;
567 subfile
->line_vector
= (struct linetable
*)
568 xmalloc (sizeof (struct linetable
)
569 + subfile
->line_vector_length
* sizeof (struct linetable_entry
));
570 subfile
->line_vector
->nitems
= 0;
573 if (subfile
->line_vector
->nitems
+ 1 >= subfile
->line_vector_length
)
575 subfile
->line_vector_length
*= 2;
576 subfile
->line_vector
= (struct linetable
*)
577 xrealloc ((char *) subfile
->line_vector
, (sizeof (struct linetable
)
578 + subfile
->line_vector_length
* sizeof (struct linetable_entry
)));
581 e
= subfile
->line_vector
->item
+ subfile
->line_vector
->nitems
++;
582 e
->line
= line
; e
->pc
= pc
;
586 /* Needed in order to sort line tables from IBM xcoff files. Sigh! */
589 compare_line_numbers (ln1p
, ln2p
)
593 struct linetable_entry
*ln1
= (struct linetable_entry
*) ln1p
;
594 struct linetable_entry
*ln2
= (struct linetable_entry
*) ln2p
;
596 /* Note: this code does not assume that CORE_ADDRs can fit in ints.
597 Please keep it that way. */
598 if (ln1
->pc
< ln2
->pc
)
601 if (ln1
->pc
> ln2
->pc
)
604 /* If pc equal, sort by line. I'm not sure whether this is optimum
605 behavior (see comment at struct linetable in symtab.h). */
606 return ln1
->line
- ln2
->line
;
610 /* Start a new symtab for a new source file.
611 Called, for example, when a stabs symbol of type N_SO is seen, or when
612 a DWARF TAG_compile_unit DIE is seen.
613 It indicates the start of data for one original source file. */
616 start_symtab (name
, dirname
, start_addr
)
619 CORE_ADDR start_addr
;
622 last_source_file
= name
;
623 last_source_start_addr
= start_addr
;
625 global_symbols
= NULL
;
628 /* Context stack is initially empty. Allocate first one with room for
629 10 levels; reuse it forever afterward. */
630 if (context_stack
== NULL
)
632 context_stack_size
= INITIAL_CONTEXT_STACK_SIZE
;
633 context_stack
= (struct context_stack
*)
634 xmalloc (context_stack_size
* sizeof (struct context_stack
));
636 context_stack_depth
= 0;
638 /* Initialize the list of sub source files with one entry
639 for this file (the top-level source file). */
642 current_subfile
= NULL
;
643 start_subfile (name
, dirname
);
646 /* Finish the symbol definitions for one main source file,
647 close off all the lexical contexts for that file
648 (creating struct block's for them), then make the struct symtab
649 for that file and put it in the list of all such.
651 END_ADDR is the address of the end of the file's text.
652 SECTION is the section number (in objfile->section_offsets) of
653 the blockvector and linetable.
655 Note that it is possible for end_symtab() to return NULL. In particular,
656 for the DWARF case at least, it will return NULL when it finds a
657 compilation unit that has exactly one DIE, a TAG_compile_unit DIE. This
658 can happen when we link in an object file that was compiled from an empty
659 source file. Returning NULL is probably not the correct thing to do,
660 because then gdb will never know about this empty file (FIXME). */
663 end_symtab (end_addr
, sort_pending
, sort_linevec
, objfile
, section
)
667 struct objfile
*objfile
;
670 register struct symtab
*symtab
= NULL
;
671 register struct blockvector
*blockvector
;
672 register struct subfile
*subfile
;
673 register struct context_stack
*cstk
;
674 struct subfile
*nextsub
;
676 /* Finish the lexical context of the last function in the file;
677 pop the context stack. */
679 if (context_stack_depth
> 0)
681 context_stack_depth
--;
682 cstk
= &context_stack
[context_stack_depth
];
683 /* Make a block for the local symbols within. */
684 finish_block (cstk
->name
, &local_symbols
, cstk
->old_blocks
,
685 cstk
->start_addr
, end_addr
, objfile
);
687 if (context_stack_depth
> 0)
689 /* This is said to happen with SCO. The old coffread.c code
690 simply emptied the context stack, so we do the same. FIXME:
691 Find out why it is happening. This is not believed to happen
692 in most cases (even for coffread.c); it used to be an abort(). */
693 static struct complaint msg
=
694 {"Context stack not empty in end_symtab", 0, 0};
696 context_stack_depth
= 0;
700 /* It is unfortunate that in xcoff, pending blocks might not be ordered
701 in this stage. Especially, blocks for static functions will show up at
702 the end. We need to sort them, so tools like `find_pc_function' and
703 `find_pc_block' can work reliably. */
705 if (sort_pending
&& pending_blocks
)
707 /* FIXME! Remove this horrid bubble sort and use qsort!!! */
711 struct pending_block
*pb
, *pbnext
;
719 /* swap blocks if unordered! */
721 if (BLOCK_START(pb
->block
) < BLOCK_START(pbnext
->block
))
723 struct block
*tmp
= pb
->block
;
724 pb
->block
= pbnext
->block
;
729 pbnext
= pbnext
->next
;
734 /* Cleanup any undefined types that have been left hanging around
735 (this needs to be done before the finish_blocks so that
736 file_symbols is still good).
738 Both cleanup_undefined_types and finish_global_stabs are stabs
739 specific, but harmless for other symbol readers, since on gdb
740 startup or when finished reading stabs, the state is set so these
741 are no-ops. FIXME: Is this handled right in case of QUIT? Can
742 we make this cleaner? */
744 cleanup_undefined_types ();
745 finish_global_stabs (objfile
);
747 if (pending_blocks
== NULL
748 && file_symbols
== NULL
749 && global_symbols
== NULL
)
751 /* Ignore symtabs that have no functions with real debugging info */
756 /* Define the STATIC_BLOCK & GLOBAL_BLOCK, and build the blockvector. */
757 finish_block (0, &file_symbols
, 0, last_source_start_addr
, end_addr
,
759 finish_block (0, &global_symbols
, 0, last_source_start_addr
, end_addr
,
761 blockvector
= make_blockvector (objfile
);
764 #ifdef PROCESS_LINENUMBER_HOOK
765 PROCESS_LINENUMBER_HOOK (); /* Needed for xcoff. */
768 /* Now create the symtab objects proper, one for each subfile. */
769 /* (The main file is the last one on the chain.) */
771 for (subfile
= subfiles
; subfile
; subfile
= nextsub
)
773 int linetablesize
= 0;
774 /* If we have blocks of symbols, make a symtab.
775 Otherwise, just ignore this file and any line number info in it. */
779 if (subfile
->line_vector
)
781 linetablesize
= sizeof (struct linetable
) +
782 subfile
->line_vector
->nitems
* sizeof (struct linetable_entry
);
784 /* I think this is artifact from before it went on the obstack.
785 I doubt we'll need the memory between now and when we
786 free it later in this function. */
787 /* First, shrink the linetable to make more memory. */
788 subfile
->line_vector
= (struct linetable
*)
789 xrealloc ((char *) subfile
->line_vector
, linetablesize
);
791 /* If sort_linevec is false, we might want just check to make
792 sure they are sorted and complain() if not, as a way of
793 tracking down compilers/symbol readers which don't get
794 them sorted right. */
797 qsort (subfile
->line_vector
->item
,
798 subfile
->line_vector
->nitems
,
799 sizeof (struct linetable_entry
), compare_line_numbers
);
802 /* Now, allocate a symbol table. */
803 symtab
= allocate_symtab (subfile
->name
, objfile
);
805 /* Fill in its components. */
806 symtab
->blockvector
= blockvector
;
807 if (subfile
->line_vector
)
809 /* Reallocate the line table on the symbol obstack */
810 symtab
->linetable
= (struct linetable
*)
811 obstack_alloc (&objfile
-> symbol_obstack
, linetablesize
);
812 memcpy (symtab
->linetable
, subfile
->line_vector
, linetablesize
);
816 symtab
->linetable
= NULL
;
818 symtab
->block_line_section
= section
;
819 if (subfile
->dirname
)
821 /* Reallocate the dirname on the symbol obstack */
822 symtab
->dirname
= (char *)
823 obstack_alloc (&objfile
-> symbol_obstack
,
824 strlen (subfile
-> dirname
) + 1);
825 strcpy (symtab
->dirname
, subfile
->dirname
);
829 symtab
->dirname
= NULL
;
831 symtab
->free_code
= free_linetable
;
832 symtab
->free_ptr
= NULL
;
834 /* Use whatever language we have been using for this subfile,
835 not the one that was deduced in allocate_symtab from the
836 filename. We already did our own deducing when we created
837 the subfile, and we may have altered our opinion of what
838 language it is from things we found in the symbols. */
839 symtab
->language
= subfile
->language
;
841 /* All symtabs for the main file and the subfiles share a
842 blockvector, so we need to clear primary for everything but
847 if (subfile
->name
!= NULL
)
849 free ((PTR
) subfile
->name
);
851 if (subfile
->dirname
!= NULL
)
853 free ((PTR
) subfile
->dirname
);
855 if (subfile
->line_vector
!= NULL
)
857 free ((PTR
) subfile
->line_vector
);
860 nextsub
= subfile
->next
;
864 /* Set this for the main source file. */
870 last_source_file
= NULL
;
871 current_subfile
= NULL
;
877 /* Push a context block. Args are an identifying nesting level (checkable
878 when you pop it), and the starting PC address of this context. */
880 struct context_stack
*
881 push_context (desc
, valu
)
885 register struct context_stack
*new;
887 if (context_stack_depth
== context_stack_size
)
889 context_stack_size
*= 2;
890 context_stack
= (struct context_stack
*)
891 xrealloc ((char *) context_stack
,
892 (context_stack_size
* sizeof (struct context_stack
)));
895 new = &context_stack
[context_stack_depth
++];
897 new->locals
= local_symbols
;
898 new->old_blocks
= pending_blocks
;
899 new->start_addr
= valu
;
902 local_symbols
= NULL
;
908 /* Compute a small integer hash code for the given name. */
914 register char *p
= name
;
915 register int total
= p
[0];
930 /* Ensure result is positive. */
933 total
+= (1000 << 6);
935 return (total
% HASHSIZE
);
939 /* Initialize anything that needs initializing when starting to read
940 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
946 free_pendings
= NULL
;
948 global_symbols
= NULL
;
949 pending_blocks
= NULL
;
952 /* Initialize anything that needs initializing when a completely new
953 symbol file is specified (not just adding some symbols from another
954 file, e.g. a shared library). */
962 /* Initializer for this module */
965 _initialize_buildsym ()