Commit | Line | Data |
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c906108c | 1 | /* Support routines for building symbol tables in GDB's internal format. |
197e01b6 | 2 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
6aba47ca | 3 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007 |
25caa7a8 | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
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. | |
24 | ||
25 | Routines to support specific debugging information formats (stabs, | |
26 | DWARF, etc) belong somewhere else. */ | |
27 | ||
28 | #include "defs.h" | |
29 | #include "bfd.h" | |
04ea0df1 | 30 | #include "gdb_obstack.h" |
c906108c | 31 | #include "symtab.h" |
72367fb4 | 32 | #include "symfile.h" |
c906108c SS |
33 | #include "objfiles.h" |
34 | #include "gdbtypes.h" | |
0c5e171a | 35 | #include "gdb_assert.h" |
c906108c SS |
36 | #include "complaints.h" |
37 | #include "gdb_string.h" | |
91b9ff21 | 38 | #include "expression.h" /* For "enum exp_opcode" used by... */ |
357e46e7 | 39 | #include "bcache.h" |
d5166ae1 | 40 | #include "filenames.h" /* For DOSish file names */ |
99d9066e | 41 | #include "macrotab.h" |
261397f8 | 42 | #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */ |
fe898f56 | 43 | #include "block.h" |
9219021c | 44 | #include "cp-support.h" |
de4f826b | 45 | #include "dictionary.h" |
9219021c | 46 | |
c906108c | 47 | /* Ask buildsym.h to define the vars it normally declares `extern'. */ |
c5aa993b JM |
48 | #define EXTERN |
49 | /**/ | |
c906108c SS |
50 | #include "buildsym.h" /* Our own declarations */ |
51 | #undef EXTERN | |
52 | ||
53 | /* For cleanup_undefined_types and finish_global_stabs (somewhat | |
54 | questionable--see comment where we call them). */ | |
55 | ||
56 | #include "stabsread.h" | |
57 | ||
58 | /* List of free `struct pending' structures for reuse. */ | |
59 | ||
60 | static struct pending *free_pendings; | |
61 | ||
62 | /* Non-zero if symtab has line number info. This prevents an | |
63 | otherwise empty symtab from being tossed. */ | |
64 | ||
65 | static int have_line_numbers; | |
66 | \f | |
67 | static int compare_line_numbers (const void *ln1p, const void *ln2p); | |
68 | \f | |
69 | ||
70 | /* Initial sizes of data structures. These are realloc'd larger if | |
71 | needed, and realloc'd down to the size actually used, when | |
72 | completed. */ | |
73 | ||
74 | #define INITIAL_CONTEXT_STACK_SIZE 10 | |
75 | #define INITIAL_LINE_VECTOR_LENGTH 1000 | |
76 | \f | |
77 | ||
c906108c SS |
78 | /* maintain the lists of symbols and blocks */ |
79 | ||
59527da0 JB |
80 | /* Add a pending list to free_pendings. */ |
81 | void | |
82 | add_free_pendings (struct pending *list) | |
83 | { | |
52f0bd74 | 84 | struct pending *link = list; |
59527da0 JB |
85 | |
86 | if (list) | |
87 | { | |
88 | while (link->next) link = link->next; | |
89 | link->next = free_pendings; | |
90 | free_pendings = list; | |
91 | } | |
92 | } | |
93 | ||
9219021c DC |
94 | /* Add a symbol to one of the lists of symbols. While we're at it, if |
95 | we're in the C++ case and don't have full namespace debugging info, | |
96 | check to see if it references an anonymous namespace; if so, add an | |
97 | appropriate using directive. */ | |
c906108c SS |
98 | |
99 | void | |
100 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
101 | { | |
52f0bd74 | 102 | struct pending *link; |
c906108c SS |
103 | |
104 | /* If this is an alias for another symbol, don't add it. */ | |
105 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') | |
106 | return; | |
107 | ||
108 | /* We keep PENDINGSIZE symbols in each link of the list. If we | |
109 | don't have a link with room in it, add a new link. */ | |
110 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) | |
111 | { | |
112 | if (free_pendings) | |
113 | { | |
114 | link = free_pendings; | |
115 | free_pendings = link->next; | |
116 | } | |
117 | else | |
118 | { | |
119 | link = (struct pending *) xmalloc (sizeof (struct pending)); | |
120 | } | |
121 | ||
122 | link->next = *listhead; | |
123 | *listhead = link; | |
124 | link->nsyms = 0; | |
125 | } | |
126 | ||
127 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; | |
9219021c DC |
128 | |
129 | /* Check to see if we might need to look for a mention of anonymous | |
130 | namespaces. */ | |
131 | ||
132 | if (SYMBOL_LANGUAGE (symbol) == language_cplus) | |
133 | cp_scan_for_anonymous_namespaces (symbol); | |
c906108c SS |
134 | } |
135 | ||
136 | /* Find a symbol named NAME on a LIST. NAME need not be | |
137 | '\0'-terminated; LENGTH is the length of the name. */ | |
138 | ||
139 | struct symbol * | |
140 | find_symbol_in_list (struct pending *list, char *name, int length) | |
141 | { | |
142 | int j; | |
143 | char *pp; | |
144 | ||
145 | while (list != NULL) | |
146 | { | |
147 | for (j = list->nsyms; --j >= 0;) | |
148 | { | |
22abf04a | 149 | pp = DEPRECATED_SYMBOL_NAME (list->symbol[j]); |
c906108c SS |
150 | if (*pp == *name && strncmp (pp, name, length) == 0 && |
151 | pp[length] == '\0') | |
152 | { | |
153 | return (list->symbol[j]); | |
154 | } | |
155 | } | |
156 | list = list->next; | |
157 | } | |
158 | return (NULL); | |
159 | } | |
160 | ||
161 | /* At end of reading syms, or in case of quit, really free as many | |
162 | `struct pending's as we can easily find. */ | |
163 | ||
c906108c | 164 | void |
bde58177 | 165 | really_free_pendings (void *dummy) |
c906108c SS |
166 | { |
167 | struct pending *next, *next1; | |
168 | ||
169 | for (next = free_pendings; next; next = next1) | |
170 | { | |
171 | next1 = next->next; | |
b8c9b27d | 172 | xfree ((void *) next); |
c906108c SS |
173 | } |
174 | free_pendings = NULL; | |
175 | ||
176 | free_pending_blocks (); | |
177 | ||
178 | for (next = file_symbols; next != NULL; next = next1) | |
179 | { | |
180 | next1 = next->next; | |
b8c9b27d | 181 | xfree ((void *) next); |
c906108c SS |
182 | } |
183 | file_symbols = NULL; | |
184 | ||
185 | for (next = global_symbols; next != NULL; next = next1) | |
186 | { | |
187 | next1 = next->next; | |
b8c9b27d | 188 | xfree ((void *) next); |
c906108c SS |
189 | } |
190 | global_symbols = NULL; | |
99d9066e JB |
191 | |
192 | if (pending_macros) | |
193 | free_macro_table (pending_macros); | |
c906108c SS |
194 | } |
195 | ||
196 | /* This function is called to discard any pending blocks. */ | |
197 | ||
198 | void | |
199 | free_pending_blocks (void) | |
200 | { | |
201 | #if 0 /* Now we make the links in the | |
4a146b47 | 202 | objfile_obstack, so don't free |
c906108c SS |
203 | them. */ |
204 | struct pending_block *bnext, *bnext1; | |
205 | ||
206 | for (bnext = pending_blocks; bnext; bnext = bnext1) | |
207 | { | |
208 | bnext1 = bnext->next; | |
b8c9b27d | 209 | xfree ((void *) bnext); |
c906108c SS |
210 | } |
211 | #endif | |
212 | pending_blocks = NULL; | |
213 | } | |
214 | ||
215 | /* Take one of the lists of symbols and make a block from it. Keep | |
216 | the order the symbols have in the list (reversed from the input | |
217 | file). Put the block on the list of pending blocks. */ | |
218 | ||
219 | void | |
220 | finish_block (struct symbol *symbol, struct pending **listhead, | |
221 | struct pending_block *old_blocks, | |
222 | CORE_ADDR start, CORE_ADDR end, | |
223 | struct objfile *objfile) | |
224 | { | |
52f0bd74 AC |
225 | struct pending *next, *next1; |
226 | struct block *block; | |
227 | struct pending_block *pblock; | |
c906108c | 228 | struct pending_block *opblock; |
c906108c | 229 | |
4a146b47 | 230 | block = allocate_block (&objfile->objfile_obstack); |
c906108c | 231 | |
261397f8 DJ |
232 | if (symbol) |
233 | { | |
4a146b47 | 234 | BLOCK_DICT (block) = dict_create_linear (&objfile->objfile_obstack, |
de4f826b | 235 | *listhead); |
261397f8 DJ |
236 | } |
237 | else | |
c906108c | 238 | { |
4a146b47 | 239 | BLOCK_DICT (block) = dict_create_hashed (&objfile->objfile_obstack, |
de4f826b | 240 | *listhead); |
c906108c SS |
241 | } |
242 | ||
243 | BLOCK_START (block) = start; | |
244 | BLOCK_END (block) = end; | |
245 | /* Superblock filled in when containing block is made */ | |
246 | BLOCK_SUPERBLOCK (block) = NULL; | |
9219021c | 247 | BLOCK_NAMESPACE (block) = NULL; |
c906108c | 248 | |
c906108c SS |
249 | /* Put the block in as the value of the symbol that names it. */ |
250 | ||
251 | if (symbol) | |
252 | { | |
253 | struct type *ftype = SYMBOL_TYPE (symbol); | |
de4f826b | 254 | struct dict_iterator iter; |
c906108c SS |
255 | SYMBOL_BLOCK_VALUE (symbol) = block; |
256 | BLOCK_FUNCTION (block) = symbol; | |
257 | ||
258 | if (TYPE_NFIELDS (ftype) <= 0) | |
259 | { | |
260 | /* No parameter type information is recorded with the | |
261 | function's type. Set that from the type of the | |
262 | parameter symbols. */ | |
263 | int nparams = 0, iparams; | |
264 | struct symbol *sym; | |
de4f826b | 265 | ALL_BLOCK_SYMBOLS (block, iter, sym) |
c906108c | 266 | { |
c906108c SS |
267 | switch (SYMBOL_CLASS (sym)) |
268 | { | |
269 | case LOC_ARG: | |
270 | case LOC_REF_ARG: | |
271 | case LOC_REGPARM: | |
272 | case LOC_REGPARM_ADDR: | |
273 | case LOC_BASEREG_ARG: | |
274 | case LOC_LOCAL_ARG: | |
4c2df51b | 275 | case LOC_COMPUTED_ARG: |
c906108c SS |
276 | nparams++; |
277 | break; | |
278 | case LOC_UNDEF: | |
279 | case LOC_CONST: | |
280 | case LOC_STATIC: | |
281 | case LOC_INDIRECT: | |
282 | case LOC_REGISTER: | |
283 | case LOC_LOCAL: | |
284 | case LOC_TYPEDEF: | |
285 | case LOC_LABEL: | |
286 | case LOC_BLOCK: | |
287 | case LOC_CONST_BYTES: | |
288 | case LOC_BASEREG: | |
289 | case LOC_UNRESOLVED: | |
290 | case LOC_OPTIMIZED_OUT: | |
4c2df51b | 291 | case LOC_COMPUTED: |
c906108c SS |
292 | default: |
293 | break; | |
294 | } | |
295 | } | |
296 | if (nparams > 0) | |
297 | { | |
298 | TYPE_NFIELDS (ftype) = nparams; | |
299 | TYPE_FIELDS (ftype) = (struct field *) | |
300 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); | |
301 | ||
de4f826b DC |
302 | iparams = 0; |
303 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
c906108c | 304 | { |
de4f826b DC |
305 | if (iparams == nparams) |
306 | break; | |
307 | ||
c906108c SS |
308 | switch (SYMBOL_CLASS (sym)) |
309 | { | |
310 | case LOC_ARG: | |
311 | case LOC_REF_ARG: | |
312 | case LOC_REGPARM: | |
313 | case LOC_REGPARM_ADDR: | |
314 | case LOC_BASEREG_ARG: | |
315 | case LOC_LOCAL_ARG: | |
4c2df51b | 316 | case LOC_COMPUTED_ARG: |
c906108c | 317 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
8176bb6d | 318 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
c906108c SS |
319 | iparams++; |
320 | break; | |
321 | case LOC_UNDEF: | |
322 | case LOC_CONST: | |
323 | case LOC_STATIC: | |
324 | case LOC_INDIRECT: | |
325 | case LOC_REGISTER: | |
326 | case LOC_LOCAL: | |
327 | case LOC_TYPEDEF: | |
328 | case LOC_LABEL: | |
329 | case LOC_BLOCK: | |
330 | case LOC_CONST_BYTES: | |
331 | case LOC_BASEREG: | |
332 | case LOC_UNRESOLVED: | |
333 | case LOC_OPTIMIZED_OUT: | |
4c2df51b | 334 | case LOC_COMPUTED: |
c906108c SS |
335 | default: |
336 | break; | |
337 | } | |
338 | } | |
339 | } | |
340 | } | |
9219021c DC |
341 | |
342 | /* If we're in the C++ case, set the block's scope. */ | |
343 | if (SYMBOL_LANGUAGE (symbol) == language_cplus) | |
344 | { | |
4a146b47 | 345 | cp_set_block_scope (symbol, block, &objfile->objfile_obstack); |
9219021c | 346 | } |
c906108c SS |
347 | } |
348 | else | |
349 | { | |
350 | BLOCK_FUNCTION (block) = NULL; | |
351 | } | |
352 | ||
353 | /* Now "free" the links of the list, and empty the list. */ | |
354 | ||
355 | for (next = *listhead; next; next = next1) | |
356 | { | |
357 | next1 = next->next; | |
358 | next->next = free_pendings; | |
359 | free_pendings = next; | |
360 | } | |
361 | *listhead = NULL; | |
362 | ||
363 | #if 1 | |
364 | /* Check to be sure that the blocks have an end address that is | |
365 | greater than starting address */ | |
366 | ||
367 | if (BLOCK_END (block) < BLOCK_START (block)) | |
368 | { | |
369 | if (symbol) | |
370 | { | |
23136709 | 371 | complaint (&symfile_complaints, |
3d263c1d | 372 | _("block end address less than block start address in %s (patched it)"), |
de5ad195 | 373 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
374 | } |
375 | else | |
376 | { | |
23136709 | 377 | complaint (&symfile_complaints, |
3d263c1d | 378 | _("block end address 0x%s less than block start address 0x%s (patched it)"), |
23136709 | 379 | paddr_nz (BLOCK_END (block)), paddr_nz (BLOCK_START (block))); |
c906108c SS |
380 | } |
381 | /* Better than nothing */ | |
382 | BLOCK_END (block) = BLOCK_START (block); | |
383 | } | |
384 | #endif | |
385 | ||
386 | /* Install this block as the superblock of all blocks made since the | |
387 | start of this scope that don't have superblocks yet. */ | |
388 | ||
389 | opblock = NULL; | |
c0219d42 MS |
390 | for (pblock = pending_blocks; |
391 | pblock && pblock != old_blocks; | |
392 | pblock = pblock->next) | |
c906108c SS |
393 | { |
394 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) | |
395 | { | |
396 | #if 1 | |
397 | /* Check to be sure the blocks are nested as we receive | |
398 | them. If the compiler/assembler/linker work, this just | |
14711c82 DJ |
399 | burns a small amount of time. |
400 | ||
401 | Skip blocks which correspond to a function; they're not | |
402 | physically nested inside this other blocks, only | |
403 | lexically nested. */ | |
404 | if (BLOCK_FUNCTION (pblock->block) == NULL | |
405 | && (BLOCK_START (pblock->block) < BLOCK_START (block) | |
406 | || BLOCK_END (pblock->block) > BLOCK_END (block))) | |
c906108c SS |
407 | { |
408 | if (symbol) | |
409 | { | |
23136709 | 410 | complaint (&symfile_complaints, |
3d263c1d | 411 | _("inner block not inside outer block in %s"), |
de5ad195 | 412 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
413 | } |
414 | else | |
415 | { | |
23136709 | 416 | complaint (&symfile_complaints, |
3d263c1d | 417 | _("inner block (0x%s-0x%s) not inside outer block (0x%s-0x%s)"), |
23136709 KB |
418 | paddr_nz (BLOCK_START (pblock->block)), |
419 | paddr_nz (BLOCK_END (pblock->block)), | |
420 | paddr_nz (BLOCK_START (block)), | |
421 | paddr_nz (BLOCK_END (block))); | |
c906108c SS |
422 | } |
423 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) | |
424 | BLOCK_START (pblock->block) = BLOCK_START (block); | |
425 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) | |
426 | BLOCK_END (pblock->block) = BLOCK_END (block); | |
427 | } | |
428 | #endif | |
429 | BLOCK_SUPERBLOCK (pblock->block) = block; | |
430 | } | |
431 | opblock = pblock; | |
432 | } | |
433 | ||
434 | record_pending_block (objfile, block, opblock); | |
435 | } | |
436 | ||
de4f826b | 437 | |
c906108c SS |
438 | /* Record BLOCK on the list of all blocks in the file. Put it after |
439 | OPBLOCK, or at the beginning if opblock is NULL. This puts the | |
440 | block in the list after all its subblocks. | |
441 | ||
4a146b47 | 442 | Allocate the pending block struct in the objfile_obstack to save |
c906108c SS |
443 | time. This wastes a little space. FIXME: Is it worth it? */ |
444 | ||
445 | void | |
446 | record_pending_block (struct objfile *objfile, struct block *block, | |
447 | struct pending_block *opblock) | |
448 | { | |
52f0bd74 | 449 | struct pending_block *pblock; |
c906108c SS |
450 | |
451 | pblock = (struct pending_block *) | |
4a146b47 | 452 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct pending_block)); |
c906108c SS |
453 | pblock->block = block; |
454 | if (opblock) | |
455 | { | |
456 | pblock->next = opblock->next; | |
457 | opblock->next = pblock; | |
458 | } | |
459 | else | |
460 | { | |
461 | pblock->next = pending_blocks; | |
462 | pending_blocks = pblock; | |
463 | } | |
464 | } | |
465 | ||
822e978b | 466 | static struct blockvector * |
c906108c SS |
467 | make_blockvector (struct objfile *objfile) |
468 | { | |
52f0bd74 AC |
469 | struct pending_block *next; |
470 | struct blockvector *blockvector; | |
471 | int i; | |
c906108c SS |
472 | |
473 | /* Count the length of the list of blocks. */ | |
474 | ||
475 | for (next = pending_blocks, i = 0; next; next = next->next, i++) | |
476 | {; | |
477 | } | |
478 | ||
479 | blockvector = (struct blockvector *) | |
4a146b47 | 480 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
481 | (sizeof (struct blockvector) |
482 | + (i - 1) * sizeof (struct block *))); | |
483 | ||
484 | /* Copy the blocks into the blockvector. This is done in reverse | |
485 | order, which happens to put the blocks into the proper order | |
486 | (ascending starting address). finish_block has hair to insert | |
487 | each block into the list after its subblocks in order to make | |
488 | sure this is true. */ | |
489 | ||
490 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
491 | for (next = pending_blocks; next; next = next->next) | |
492 | { | |
493 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
494 | } | |
495 | ||
496 | #if 0 /* Now we make the links in the | |
497 | obstack, so don't free them. */ | |
498 | /* Now free the links of the list, and empty the list. */ | |
499 | ||
500 | for (next = pending_blocks; next; next = next1) | |
501 | { | |
502 | next1 = next->next; | |
b8c9b27d | 503 | xfree (next); |
c906108c SS |
504 | } |
505 | #endif | |
506 | pending_blocks = NULL; | |
507 | ||
508 | #if 1 /* FIXME, shut this off after a while | |
509 | to speed up symbol reading. */ | |
510 | /* Some compilers output blocks in the wrong order, but we depend on | |
511 | their being in the right order so we can binary search. Check the | |
512 | order and moan about it. FIXME. */ | |
513 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) | |
514 | { | |
515 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) | |
516 | { | |
517 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) | |
518 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) | |
519 | { | |
59527da0 JB |
520 | CORE_ADDR start |
521 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); | |
c906108c | 522 | |
3d263c1d | 523 | complaint (&symfile_complaints, _("block at %s out of order"), |
bb599908 | 524 | hex_string ((LONGEST) start)); |
c906108c SS |
525 | } |
526 | } | |
527 | } | |
528 | #endif | |
529 | ||
530 | return (blockvector); | |
531 | } | |
532 | \f | |
533 | /* Start recording information about source code that came from an | |
534 | included (or otherwise merged-in) source file with a different | |
535 | name. NAME is the name of the file (cannot be NULL), DIRNAME is | |
536 | the directory in which it resides (or NULL if not known). */ | |
537 | ||
538 | void | |
539 | start_subfile (char *name, char *dirname) | |
540 | { | |
52f0bd74 | 541 | struct subfile *subfile; |
c906108c SS |
542 | |
543 | /* See if this subfile is already known as a subfile of the current | |
544 | main source file. */ | |
545 | ||
546 | for (subfile = subfiles; subfile; subfile = subfile->next) | |
547 | { | |
84ba0adf DJ |
548 | char *subfile_name; |
549 | ||
550 | /* If NAME is an absolute path, and this subfile is not, then | |
551 | attempt to create an absolute path to compare. */ | |
552 | if (IS_ABSOLUTE_PATH (name) | |
553 | && !IS_ABSOLUTE_PATH (subfile->name) | |
554 | && subfile->dirname != NULL) | |
555 | subfile_name = concat (subfile->dirname, SLASH_STRING, | |
556 | subfile->name, NULL); | |
557 | else | |
558 | subfile_name = subfile->name; | |
559 | ||
560 | if (FILENAME_CMP (subfile_name, name) == 0) | |
c906108c SS |
561 | { |
562 | current_subfile = subfile; | |
84ba0adf DJ |
563 | if (subfile_name != subfile->name) |
564 | xfree (subfile_name); | |
c906108c SS |
565 | return; |
566 | } | |
84ba0adf DJ |
567 | if (subfile_name != subfile->name) |
568 | xfree (subfile_name); | |
c906108c SS |
569 | } |
570 | ||
571 | /* This subfile is not known. Add an entry for it. Make an entry | |
572 | for this subfile in the list of all subfiles of the current main | |
573 | source file. */ | |
574 | ||
575 | subfile = (struct subfile *) xmalloc (sizeof (struct subfile)); | |
59527da0 | 576 | memset ((char *) subfile, 0, sizeof (struct subfile)); |
c906108c SS |
577 | subfile->next = subfiles; |
578 | subfiles = subfile; | |
579 | current_subfile = subfile; | |
580 | ||
581 | /* Save its name and compilation directory name */ | |
582 | subfile->name = (name == NULL) ? NULL : savestring (name, strlen (name)); | |
583 | subfile->dirname = | |
584 | (dirname == NULL) ? NULL : savestring (dirname, strlen (dirname)); | |
585 | ||
586 | /* Initialize line-number recording for this subfile. */ | |
587 | subfile->line_vector = NULL; | |
588 | ||
589 | /* Default the source language to whatever can be deduced from the | |
590 | filename. If nothing can be deduced (such as for a C/C++ include | |
591 | file with a ".h" extension), then inherit whatever language the | |
592 | previous subfile had. This kludgery is necessary because there | |
593 | is no standard way in some object formats to record the source | |
594 | language. Also, when symtabs are allocated we try to deduce a | |
595 | language then as well, but it is too late for us to use that | |
596 | information while reading symbols, since symtabs aren't allocated | |
597 | until after all the symbols have been processed for a given | |
598 | source file. */ | |
599 | ||
600 | subfile->language = deduce_language_from_filename (subfile->name); | |
601 | if (subfile->language == language_unknown && | |
602 | subfile->next != NULL) | |
603 | { | |
604 | subfile->language = subfile->next->language; | |
605 | } | |
606 | ||
607 | /* Initialize the debug format string to NULL. We may supply it | |
608 | later via a call to record_debugformat. */ | |
609 | subfile->debugformat = NULL; | |
610 | ||
303b6f5d DJ |
611 | /* Similarly for the producer. */ |
612 | subfile->producer = NULL; | |
613 | ||
25caa7a8 | 614 | /* If the filename of this subfile ends in .C, then change the |
c906108c | 615 | language of any pending subfiles from C to C++. We also accept |
25caa7a8 | 616 | any other C++ suffixes accepted by deduce_language_from_filename. */ |
c906108c SS |
617 | /* Likewise for f2c. */ |
618 | ||
619 | if (subfile->name) | |
620 | { | |
621 | struct subfile *s; | |
622 | enum language sublang = deduce_language_from_filename (subfile->name); | |
623 | ||
624 | if (sublang == language_cplus || sublang == language_fortran) | |
625 | for (s = subfiles; s != NULL; s = s->next) | |
626 | if (s->language == language_c) | |
627 | s->language = sublang; | |
628 | } | |
629 | ||
630 | /* And patch up this file if necessary. */ | |
631 | if (subfile->language == language_c | |
632 | && subfile->next != NULL | |
633 | && (subfile->next->language == language_cplus | |
634 | || subfile->next->language == language_fortran)) | |
635 | { | |
636 | subfile->language = subfile->next->language; | |
637 | } | |
638 | } | |
639 | ||
640 | /* For stabs readers, the first N_SO symbol is assumed to be the | |
641 | source file name, and the subfile struct is initialized using that | |
642 | assumption. If another N_SO symbol is later seen, immediately | |
643 | following the first one, then the first one is assumed to be the | |
644 | directory name and the second one is really the source file name. | |
645 | ||
646 | So we have to patch up the subfile struct by moving the old name | |
647 | value to dirname and remembering the new name. Some sanity | |
648 | checking is performed to ensure that the state of the subfile | |
649 | struct is reasonable and that the old name we are assuming to be a | |
650 | directory name actually is (by checking for a trailing '/'). */ | |
651 | ||
652 | void | |
653 | patch_subfile_names (struct subfile *subfile, char *name) | |
654 | { | |
655 | if (subfile != NULL && subfile->dirname == NULL && subfile->name != NULL | |
656 | && subfile->name[strlen (subfile->name) - 1] == '/') | |
657 | { | |
658 | subfile->dirname = subfile->name; | |
659 | subfile->name = savestring (name, strlen (name)); | |
660 | last_source_file = name; | |
661 | ||
662 | /* Default the source language to whatever can be deduced from | |
663 | the filename. If nothing can be deduced (such as for a C/C++ | |
664 | include file with a ".h" extension), then inherit whatever | |
665 | language the previous subfile had. This kludgery is | |
666 | necessary because there is no standard way in some object | |
667 | formats to record the source language. Also, when symtabs | |
668 | are allocated we try to deduce a language then as well, but | |
669 | it is too late for us to use that information while reading | |
670 | symbols, since symtabs aren't allocated until after all the | |
671 | symbols have been processed for a given source file. */ | |
672 | ||
673 | subfile->language = deduce_language_from_filename (subfile->name); | |
674 | if (subfile->language == language_unknown && | |
675 | subfile->next != NULL) | |
676 | { | |
677 | subfile->language = subfile->next->language; | |
678 | } | |
679 | } | |
680 | } | |
681 | \f | |
682 | /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for | |
683 | switching source files (different subfiles, as we call them) within | |
684 | one object file, but using a stack rather than in an arbitrary | |
685 | order. */ | |
686 | ||
687 | void | |
688 | push_subfile (void) | |
689 | { | |
52f0bd74 | 690 | struct subfile_stack *tem |
c906108c SS |
691 | = (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack)); |
692 | ||
693 | tem->next = subfile_stack; | |
694 | subfile_stack = tem; | |
695 | if (current_subfile == NULL || current_subfile->name == NULL) | |
696 | { | |
3d263c1d | 697 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
698 | } |
699 | tem->name = current_subfile->name; | |
700 | } | |
701 | ||
702 | char * | |
703 | pop_subfile (void) | |
704 | { | |
52f0bd74 AC |
705 | char *name; |
706 | struct subfile_stack *link = subfile_stack; | |
c906108c SS |
707 | |
708 | if (link == NULL) | |
709 | { | |
3d263c1d | 710 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
711 | } |
712 | name = link->name; | |
713 | subfile_stack = link->next; | |
b8c9b27d | 714 | xfree ((void *) link); |
c906108c SS |
715 | return (name); |
716 | } | |
717 | \f | |
718 | /* Add a linetable entry for line number LINE and address PC to the | |
719 | line vector for SUBFILE. */ | |
720 | ||
721 | void | |
aa1ee363 | 722 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
c906108c SS |
723 | { |
724 | struct linetable_entry *e; | |
725 | /* Ignore the dummy line number in libg.o */ | |
726 | ||
727 | if (line == 0xffff) | |
728 | { | |
729 | return; | |
730 | } | |
731 | ||
732 | /* Make sure line vector exists and is big enough. */ | |
733 | if (!subfile->line_vector) | |
734 | { | |
735 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; | |
736 | subfile->line_vector = (struct linetable *) | |
737 | xmalloc (sizeof (struct linetable) | |
c5aa993b | 738 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
c906108c SS |
739 | subfile->line_vector->nitems = 0; |
740 | have_line_numbers = 1; | |
741 | } | |
742 | ||
743 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) | |
744 | { | |
745 | subfile->line_vector_length *= 2; | |
746 | subfile->line_vector = (struct linetable *) | |
747 | xrealloc ((char *) subfile->line_vector, | |
748 | (sizeof (struct linetable) | |
749 | + (subfile->line_vector_length | |
750 | * sizeof (struct linetable_entry)))); | |
751 | } | |
752 | ||
607ae575 DJ |
753 | pc = gdbarch_addr_bits_remove (current_gdbarch, pc); |
754 | ||
755 | /* Normally, we treat lines as unsorted. But the end of sequence | |
756 | marker is special. We sort line markers at the same PC by line | |
757 | number, so end of sequence markers (which have line == 0) appear | |
758 | first. This is right if the marker ends the previous function, | |
759 | and there is no padding before the next function. But it is | |
760 | wrong if the previous line was empty and we are now marking a | |
761 | switch to a different subfile. We must leave the end of sequence | |
762 | marker at the end of this group of lines, not sort the empty line | |
763 | to after the marker. The easiest way to accomplish this is to | |
764 | delete any empty lines from our table, if they are followed by | |
765 | end of sequence markers. All we lose is the ability to set | |
766 | breakpoints at some lines which contain no instructions | |
767 | anyway. */ | |
768 | if (line == 0 && subfile->line_vector->nitems > 0) | |
769 | { | |
770 | e = subfile->line_vector->item + subfile->line_vector->nitems - 1; | |
771 | while (subfile->line_vector->nitems > 0 && e->pc == pc) | |
772 | { | |
773 | e--; | |
774 | subfile->line_vector->nitems--; | |
775 | } | |
776 | } | |
777 | ||
c906108c SS |
778 | e = subfile->line_vector->item + subfile->line_vector->nitems++; |
779 | e->line = line; | |
607ae575 | 780 | e->pc = pc; |
c906108c SS |
781 | } |
782 | ||
783 | /* Needed in order to sort line tables from IBM xcoff files. Sigh! */ | |
784 | ||
785 | static int | |
786 | compare_line_numbers (const void *ln1p, const void *ln2p) | |
787 | { | |
788 | struct linetable_entry *ln1 = (struct linetable_entry *) ln1p; | |
789 | struct linetable_entry *ln2 = (struct linetable_entry *) ln2p; | |
790 | ||
791 | /* Note: this code does not assume that CORE_ADDRs can fit in ints. | |
792 | Please keep it that way. */ | |
793 | if (ln1->pc < ln2->pc) | |
794 | return -1; | |
795 | ||
796 | if (ln1->pc > ln2->pc) | |
797 | return 1; | |
798 | ||
799 | /* If pc equal, sort by line. I'm not sure whether this is optimum | |
800 | behavior (see comment at struct linetable in symtab.h). */ | |
801 | return ln1->line - ln2->line; | |
802 | } | |
803 | \f | |
804 | /* Start a new symtab for a new source file. Called, for example, | |
805 | when a stabs symbol of type N_SO is seen, or when a DWARF | |
806 | TAG_compile_unit DIE is seen. It indicates the start of data for | |
807 | one original source file. */ | |
808 | ||
809 | void | |
810 | start_symtab (char *name, char *dirname, CORE_ADDR start_addr) | |
811 | { | |
812 | ||
813 | last_source_file = name; | |
814 | last_source_start_addr = start_addr; | |
815 | file_symbols = NULL; | |
816 | global_symbols = NULL; | |
817 | within_function = 0; | |
818 | have_line_numbers = 0; | |
819 | ||
820 | /* Context stack is initially empty. Allocate first one with room | |
821 | for 10 levels; reuse it forever afterward. */ | |
822 | if (context_stack == NULL) | |
823 | { | |
824 | context_stack_size = INITIAL_CONTEXT_STACK_SIZE; | |
825 | context_stack = (struct context_stack *) | |
826 | xmalloc (context_stack_size * sizeof (struct context_stack)); | |
827 | } | |
828 | context_stack_depth = 0; | |
829 | ||
9219021c DC |
830 | /* Set up support for C++ namespace support, in case we need it. */ |
831 | ||
832 | cp_initialize_namespace (); | |
833 | ||
c906108c SS |
834 | /* Initialize the list of sub source files with one entry for this |
835 | file (the top-level source file). */ | |
836 | ||
837 | subfiles = NULL; | |
838 | current_subfile = NULL; | |
839 | start_subfile (name, dirname); | |
840 | } | |
841 | ||
842 | /* Finish the symbol definitions for one main source file, close off | |
843 | all the lexical contexts for that file (creating struct block's for | |
844 | them), then make the struct symtab for that file and put it in the | |
845 | list of all such. | |
846 | ||
847 | END_ADDR is the address of the end of the file's text. SECTION is | |
848 | the section number (in objfile->section_offsets) of the blockvector | |
849 | and linetable. | |
850 | ||
851 | Note that it is possible for end_symtab() to return NULL. In | |
852 | particular, for the DWARF case at least, it will return NULL when | |
853 | it finds a compilation unit that has exactly one DIE, a | |
854 | TAG_compile_unit DIE. This can happen when we link in an object | |
855 | file that was compiled from an empty source file. Returning NULL | |
856 | is probably not the correct thing to do, because then gdb will | |
857 | never know about this empty file (FIXME). */ | |
858 | ||
859 | struct symtab * | |
860 | end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section) | |
861 | { | |
52f0bd74 AC |
862 | struct symtab *symtab = NULL; |
863 | struct blockvector *blockvector; | |
864 | struct subfile *subfile; | |
865 | struct context_stack *cstk; | |
c906108c SS |
866 | struct subfile *nextsub; |
867 | ||
868 | /* Finish the lexical context of the last function in the file; pop | |
869 | the context stack. */ | |
870 | ||
871 | if (context_stack_depth > 0) | |
872 | { | |
873 | cstk = pop_context (); | |
874 | /* Make a block for the local symbols within. */ | |
875 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
876 | cstk->start_addr, end_addr, objfile); | |
877 | ||
878 | if (context_stack_depth > 0) | |
879 | { | |
880 | /* This is said to happen with SCO. The old coffread.c | |
881 | code simply emptied the context stack, so we do the | |
882 | same. FIXME: Find out why it is happening. This is not | |
883 | believed to happen in most cases (even for coffread.c); | |
884 | it used to be an abort(). */ | |
23136709 | 885 | complaint (&symfile_complaints, |
3d263c1d | 886 | _("Context stack not empty in end_symtab")); |
c906108c SS |
887 | context_stack_depth = 0; |
888 | } | |
889 | } | |
890 | ||
891 | /* Reordered executables may have out of order pending blocks; if | |
892 | OBJF_REORDERED is true, then sort the pending blocks. */ | |
893 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) | |
894 | { | |
895 | /* FIXME! Remove this horrid bubble sort and use merge sort!!! */ | |
896 | int swapped; | |
897 | do | |
898 | { | |
899 | struct pending_block *pb, *pbnext; | |
900 | ||
901 | pb = pending_blocks; | |
902 | pbnext = pb->next; | |
903 | swapped = 0; | |
904 | ||
905 | while (pbnext) | |
906 | { | |
907 | /* swap blocks if unordered! */ | |
908 | ||
909 | if (BLOCK_START (pb->block) < BLOCK_START (pbnext->block)) | |
910 | { | |
911 | struct block *tmp = pb->block; | |
912 | pb->block = pbnext->block; | |
913 | pbnext->block = tmp; | |
914 | swapped = 1; | |
915 | } | |
916 | pb = pbnext; | |
917 | pbnext = pbnext->next; | |
918 | } | |
919 | } | |
920 | while (swapped); | |
921 | } | |
922 | ||
923 | /* Cleanup any undefined types that have been left hanging around | |
924 | (this needs to be done before the finish_blocks so that | |
925 | file_symbols is still good). | |
c5aa993b | 926 | |
c906108c SS |
927 | Both cleanup_undefined_types and finish_global_stabs are stabs |
928 | specific, but harmless for other symbol readers, since on gdb | |
929 | startup or when finished reading stabs, the state is set so these | |
930 | are no-ops. FIXME: Is this handled right in case of QUIT? Can | |
931 | we make this cleaner? */ | |
932 | ||
933 | cleanup_undefined_types (); | |
934 | finish_global_stabs (objfile); | |
935 | ||
936 | if (pending_blocks == NULL | |
937 | && file_symbols == NULL | |
938 | && global_symbols == NULL | |
99d9066e JB |
939 | && have_line_numbers == 0 |
940 | && pending_macros == NULL) | |
c906108c SS |
941 | { |
942 | /* Ignore symtabs that have no functions with real debugging | |
943 | info. */ | |
944 | blockvector = NULL; | |
945 | } | |
946 | else | |
947 | { | |
948 | /* Define the STATIC_BLOCK & GLOBAL_BLOCK, and build the | |
949 | blockvector. */ | |
950 | finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr, | |
951 | objfile); | |
952 | finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr, | |
953 | objfile); | |
954 | blockvector = make_blockvector (objfile); | |
9219021c | 955 | cp_finalize_namespace (BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK), |
4a146b47 | 956 | &objfile->objfile_obstack); |
c906108c SS |
957 | } |
958 | ||
c295b2e5 JB |
959 | /* Read the line table if it has to be read separately. */ |
960 | if (objfile->sf->sym_read_linetable != NULL) | |
961 | objfile->sf->sym_read_linetable (); | |
c906108c SS |
962 | |
963 | /* Now create the symtab objects proper, one for each subfile. */ | |
964 | /* (The main file is the last one on the chain.) */ | |
965 | ||
966 | for (subfile = subfiles; subfile; subfile = nextsub) | |
967 | { | |
968 | int linetablesize = 0; | |
969 | symtab = NULL; | |
970 | ||
971 | /* If we have blocks of symbols, make a symtab. Otherwise, just | |
972 | ignore this file and any line number info in it. */ | |
973 | if (blockvector) | |
974 | { | |
975 | if (subfile->line_vector) | |
976 | { | |
977 | linetablesize = sizeof (struct linetable) + | |
978 | subfile->line_vector->nitems * sizeof (struct linetable_entry); | |
979 | #if 0 | |
980 | /* I think this is artifact from before it went on the | |
981 | obstack. I doubt we'll need the memory between now | |
982 | and when we free it later in this function. */ | |
983 | /* First, shrink the linetable to make more memory. */ | |
984 | subfile->line_vector = (struct linetable *) | |
985 | xrealloc ((char *) subfile->line_vector, linetablesize); | |
986 | #endif | |
987 | ||
988 | /* Like the pending blocks, the line table may be | |
989 | scrambled in reordered executables. Sort it if | |
990 | OBJF_REORDERED is true. */ | |
991 | if (objfile->flags & OBJF_REORDERED) | |
992 | qsort (subfile->line_vector->item, | |
993 | subfile->line_vector->nitems, | |
c5aa993b | 994 | sizeof (struct linetable_entry), compare_line_numbers); |
c906108c SS |
995 | } |
996 | ||
997 | /* Now, allocate a symbol table. */ | |
cb1df416 DJ |
998 | if (subfile->symtab == NULL) |
999 | symtab = allocate_symtab (subfile->name, objfile); | |
1000 | else | |
1001 | symtab = subfile->symtab; | |
c906108c SS |
1002 | |
1003 | /* Fill in its components. */ | |
1004 | symtab->blockvector = blockvector; | |
99d9066e | 1005 | symtab->macro_table = pending_macros; |
c906108c SS |
1006 | if (subfile->line_vector) |
1007 | { | |
1008 | /* Reallocate the line table on the symbol obstack */ | |
1009 | symtab->linetable = (struct linetable *) | |
4a146b47 | 1010 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
c906108c SS |
1011 | memcpy (symtab->linetable, subfile->line_vector, linetablesize); |
1012 | } | |
1013 | else | |
1014 | { | |
1015 | symtab->linetable = NULL; | |
1016 | } | |
1017 | symtab->block_line_section = section; | |
1018 | if (subfile->dirname) | |
1019 | { | |
1020 | /* Reallocate the dirname on the symbol obstack */ | |
1021 | symtab->dirname = (char *) | |
4a146b47 | 1022 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
1023 | strlen (subfile->dirname) + 1); |
1024 | strcpy (symtab->dirname, subfile->dirname); | |
1025 | } | |
1026 | else | |
1027 | { | |
1028 | symtab->dirname = NULL; | |
1029 | } | |
1030 | symtab->free_code = free_linetable; | |
de4f826b | 1031 | symtab->free_func = NULL; |
c906108c SS |
1032 | |
1033 | /* Use whatever language we have been using for this | |
1034 | subfile, not the one that was deduced in allocate_symtab | |
1035 | from the filename. We already did our own deducing when | |
1036 | we created the subfile, and we may have altered our | |
1037 | opinion of what language it is from things we found in | |
1038 | the symbols. */ | |
1039 | symtab->language = subfile->language; | |
1040 | ||
1041 | /* Save the debug format string (if any) in the symtab */ | |
1042 | if (subfile->debugformat != NULL) | |
1043 | { | |
1044 | symtab->debugformat = obsavestring (subfile->debugformat, | |
c5aa993b | 1045 | strlen (subfile->debugformat), |
4a146b47 | 1046 | &objfile->objfile_obstack); |
c906108c SS |
1047 | } |
1048 | ||
303b6f5d DJ |
1049 | /* Similarly for the producer. */ |
1050 | if (subfile->producer != NULL) | |
1051 | symtab->producer = obsavestring (subfile->producer, | |
1052 | strlen (subfile->producer), | |
1053 | &objfile->objfile_obstack); | |
1054 | ||
c906108c SS |
1055 | /* All symtabs for the main file and the subfiles share a |
1056 | blockvector, so we need to clear primary for everything | |
1057 | but the main file. */ | |
1058 | ||
1059 | symtab->primary = 0; | |
1060 | } | |
1061 | if (subfile->name != NULL) | |
1062 | { | |
b8c9b27d | 1063 | xfree ((void *) subfile->name); |
c906108c SS |
1064 | } |
1065 | if (subfile->dirname != NULL) | |
1066 | { | |
b8c9b27d | 1067 | xfree ((void *) subfile->dirname); |
c906108c SS |
1068 | } |
1069 | if (subfile->line_vector != NULL) | |
1070 | { | |
b8c9b27d | 1071 | xfree ((void *) subfile->line_vector); |
c906108c SS |
1072 | } |
1073 | if (subfile->debugformat != NULL) | |
1074 | { | |
b8c9b27d | 1075 | xfree ((void *) subfile->debugformat); |
c906108c | 1076 | } |
303b6f5d DJ |
1077 | if (subfile->producer != NULL) |
1078 | xfree (subfile->producer); | |
c906108c SS |
1079 | |
1080 | nextsub = subfile->next; | |
b8c9b27d | 1081 | xfree ((void *) subfile); |
c906108c SS |
1082 | } |
1083 | ||
1084 | /* Set this for the main source file. */ | |
1085 | if (symtab) | |
1086 | { | |
1087 | symtab->primary = 1; | |
1088 | } | |
1089 | ||
cb1df416 DJ |
1090 | /* Default any symbols without a specified symtab to the primary |
1091 | symtab. */ | |
1092 | if (blockvector) | |
1093 | { | |
1094 | int block_i; | |
1095 | ||
1096 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) | |
1097 | { | |
1098 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); | |
1099 | struct symbol *sym; | |
1100 | struct dict_iterator iter; | |
1101 | ||
1102 | for (sym = dict_iterator_first (BLOCK_DICT (block), &iter); | |
1103 | sym != NULL; | |
1104 | sym = dict_iterator_next (&iter)) | |
1105 | if (SYMBOL_SYMTAB (sym) == NULL) | |
1106 | SYMBOL_SYMTAB (sym) = symtab; | |
1107 | } | |
1108 | } | |
1109 | ||
c906108c SS |
1110 | last_source_file = NULL; |
1111 | current_subfile = NULL; | |
99d9066e | 1112 | pending_macros = NULL; |
c906108c SS |
1113 | |
1114 | return symtab; | |
1115 | } | |
1116 | ||
1117 | /* Push a context block. Args are an identifying nesting level | |
1118 | (checkable when you pop it), and the starting PC address of this | |
1119 | context. */ | |
1120 | ||
1121 | struct context_stack * | |
1122 | push_context (int desc, CORE_ADDR valu) | |
1123 | { | |
52f0bd74 | 1124 | struct context_stack *new; |
c906108c SS |
1125 | |
1126 | if (context_stack_depth == context_stack_size) | |
1127 | { | |
1128 | context_stack_size *= 2; | |
1129 | context_stack = (struct context_stack *) | |
1130 | xrealloc ((char *) context_stack, | |
c5aa993b | 1131 | (context_stack_size * sizeof (struct context_stack))); |
c906108c SS |
1132 | } |
1133 | ||
1134 | new = &context_stack[context_stack_depth++]; | |
1135 | new->depth = desc; | |
1136 | new->locals = local_symbols; | |
1137 | new->params = param_symbols; | |
1138 | new->old_blocks = pending_blocks; | |
1139 | new->start_addr = valu; | |
1140 | new->name = NULL; | |
1141 | ||
1142 | local_symbols = NULL; | |
1143 | param_symbols = NULL; | |
1144 | ||
1145 | return new; | |
1146 | } | |
0c5e171a | 1147 | |
a672ef13 KD |
1148 | /* Pop a context block. Returns the address of the context block just |
1149 | popped. */ | |
1150 | ||
0c5e171a KD |
1151 | struct context_stack * |
1152 | pop_context (void) | |
1153 | { | |
1154 | gdb_assert (context_stack_depth > 0); | |
1155 | return (&context_stack[--context_stack_depth]); | |
1156 | } | |
1157 | ||
c906108c | 1158 | \f |
357e46e7 | 1159 | |
c906108c SS |
1160 | /* Compute a small integer hash code for the given name. */ |
1161 | ||
1162 | int | |
1163 | hashname (char *name) | |
1164 | { | |
357e46e7 | 1165 | return (hash(name,strlen(name)) % HASHSIZE); |
c906108c SS |
1166 | } |
1167 | \f | |
1168 | ||
1169 | void | |
1170 | record_debugformat (char *format) | |
1171 | { | |
1172 | current_subfile->debugformat = savestring (format, strlen (format)); | |
1173 | } | |
1174 | ||
303b6f5d DJ |
1175 | void |
1176 | record_producer (const char *producer) | |
1177 | { | |
05279ca0 JB |
1178 | /* The producer is not always provided in the debugging info. |
1179 | Do nothing if PRODUCER is NULL. */ | |
1180 | if (producer == NULL) | |
1181 | return; | |
1182 | ||
303b6f5d DJ |
1183 | current_subfile->producer = savestring (producer, strlen (producer)); |
1184 | } | |
1185 | ||
c906108c SS |
1186 | /* Merge the first symbol list SRCLIST into the second symbol list |
1187 | TARGETLIST by repeated calls to add_symbol_to_list(). This | |
1188 | procedure "frees" each link of SRCLIST by adding it to the | |
1189 | free_pendings list. Caller must set SRCLIST to a null list after | |
1190 | calling this function. | |
1191 | ||
1192 | Void return. */ | |
1193 | ||
1194 | void | |
1195 | merge_symbol_lists (struct pending **srclist, struct pending **targetlist) | |
1196 | { | |
52f0bd74 | 1197 | int i; |
c906108c SS |
1198 | |
1199 | if (!srclist || !*srclist) | |
1200 | return; | |
1201 | ||
1202 | /* Merge in elements from current link. */ | |
1203 | for (i = 0; i < (*srclist)->nsyms; i++) | |
1204 | add_symbol_to_list ((*srclist)->symbol[i], targetlist); | |
1205 | ||
1206 | /* Recurse on next. */ | |
1207 | merge_symbol_lists (&(*srclist)->next, targetlist); | |
1208 | ||
1209 | /* "Free" the current link. */ | |
1210 | (*srclist)->next = free_pendings; | |
1211 | free_pendings = (*srclist); | |
1212 | } | |
1213 | \f | |
1214 | /* Initialize anything that needs initializing when starting to read a | |
1215 | fresh piece of a symbol file, e.g. reading in the stuff | |
1216 | corresponding to a psymtab. */ | |
1217 | ||
1218 | void | |
fba45db2 | 1219 | buildsym_init (void) |
c906108c SS |
1220 | { |
1221 | free_pendings = NULL; | |
1222 | file_symbols = NULL; | |
1223 | global_symbols = NULL; | |
1224 | pending_blocks = NULL; | |
99d9066e | 1225 | pending_macros = NULL; |
c906108c SS |
1226 | } |
1227 | ||
1228 | /* Initialize anything that needs initializing when a completely new | |
1229 | symbol file is specified (not just adding some symbols from another | |
1230 | file, e.g. a shared library). */ | |
1231 | ||
1232 | void | |
fba45db2 | 1233 | buildsym_new_init (void) |
c906108c SS |
1234 | { |
1235 | buildsym_init (); | |
1236 | } |