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c906108c | 1 | /* Support routines for building symbol tables in GDB's internal format. |
0b302171 | 2 | Copyright (C) 1986-2004, 2007-2012 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
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 | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 9 | (at your option) any later version. |
c906108c | 10 | |
c5aa993b JM |
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. | |
c906108c | 15 | |
c5aa993b | 16 | You should have received a copy of the GNU General Public License |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
18 | |
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. | |
22 | ||
23 | Routines to support specific debugging information formats (stabs, | |
4a64f543 | 24 | DWARF, etc) belong somewhere else. */ |
c906108c SS |
25 | |
26 | #include "defs.h" | |
27 | #include "bfd.h" | |
04ea0df1 | 28 | #include "gdb_obstack.h" |
c906108c | 29 | #include "symtab.h" |
72367fb4 | 30 | #include "symfile.h" |
c906108c SS |
31 | #include "objfiles.h" |
32 | #include "gdbtypes.h" | |
0c5e171a | 33 | #include "gdb_assert.h" |
c906108c SS |
34 | #include "complaints.h" |
35 | #include "gdb_string.h" | |
4a64f543 | 36 | #include "expression.h" /* For "enum exp_opcode" used by... */ |
357e46e7 | 37 | #include "bcache.h" |
4a64f543 | 38 | #include "filenames.h" /* For DOSish file names. */ |
99d9066e | 39 | #include "macrotab.h" |
261397f8 | 40 | #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */ |
fe898f56 | 41 | #include "block.h" |
9219021c | 42 | #include "cp-support.h" |
de4f826b | 43 | #include "dictionary.h" |
801e3a5b | 44 | #include "addrmap.h" |
9219021c | 45 | |
c906108c | 46 | /* Ask buildsym.h to define the vars it normally declares `extern'. */ |
c5aa993b JM |
47 | #define EXTERN |
48 | /**/ | |
4a64f543 | 49 | #include "buildsym.h" /* Our own declarations. */ |
c906108c SS |
50 | #undef EXTERN |
51 | ||
0a0edcd5 | 52 | /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat |
c906108c SS |
53 | questionable--see comment where we call them). */ |
54 | ||
55 | #include "stabsread.h" | |
56 | ||
94d09e04 DE |
57 | /* List of subfiles. */ |
58 | ||
59 | static struct subfile *subfiles; | |
60 | ||
c906108c SS |
61 | /* List of free `struct pending' structures for reuse. */ |
62 | ||
63 | static struct pending *free_pendings; | |
64 | ||
65 | /* Non-zero if symtab has line number info. This prevents an | |
66 | otherwise empty symtab from being tossed. */ | |
67 | ||
68 | static int have_line_numbers; | |
801e3a5b JB |
69 | |
70 | /* The mutable address map for the compilation unit whose symbols | |
71 | we're currently reading. The symtabs' shared blockvector will | |
72 | point to a fixed copy of this. */ | |
73 | static struct addrmap *pending_addrmap; | |
74 | ||
75 | /* The obstack on which we allocate pending_addrmap. | |
76 | If pending_addrmap is NULL, this is uninitialized; otherwise, it is | |
77 | initialized (and holds pending_addrmap). */ | |
78 | static struct obstack pending_addrmap_obstack; | |
79 | ||
80 | /* Non-zero if we recorded any ranges in the addrmap that are | |
81 | different from those in the blockvector already. We set this to | |
82 | zero when we start processing a symfile, and if it's still zero at | |
83 | the end, then we just toss the addrmap. */ | |
84 | static int pending_addrmap_interesting; | |
85 | ||
c906108c SS |
86 | \f |
87 | static int compare_line_numbers (const void *ln1p, const void *ln2p); | |
0b49e518 TT |
88 | |
89 | static void record_pending_block (struct objfile *objfile, | |
90 | struct block *block, | |
91 | struct pending_block *opblock); | |
c906108c SS |
92 | \f |
93 | ||
94 | /* Initial sizes of data structures. These are realloc'd larger if | |
95 | needed, and realloc'd down to the size actually used, when | |
96 | completed. */ | |
97 | ||
98 | #define INITIAL_CONTEXT_STACK_SIZE 10 | |
99 | #define INITIAL_LINE_VECTOR_LENGTH 1000 | |
100 | \f | |
101 | ||
4a64f543 | 102 | /* Maintain the lists of symbols and blocks. */ |
c906108c | 103 | |
93bf33fd | 104 | /* Add a symbol to one of the lists of symbols. */ |
c906108c SS |
105 | |
106 | void | |
107 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
108 | { | |
52f0bd74 | 109 | struct pending *link; |
c906108c SS |
110 | |
111 | /* If this is an alias for another symbol, don't add it. */ | |
112 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') | |
113 | return; | |
114 | ||
4a64f543 | 115 | /* We keep PENDINGSIZE symbols in each link of the list. If we |
c906108c SS |
116 | don't have a link with room in it, add a new link. */ |
117 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) | |
118 | { | |
119 | if (free_pendings) | |
120 | { | |
121 | link = free_pendings; | |
122 | free_pendings = link->next; | |
123 | } | |
124 | else | |
125 | { | |
126 | link = (struct pending *) xmalloc (sizeof (struct pending)); | |
127 | } | |
128 | ||
129 | link->next = *listhead; | |
130 | *listhead = link; | |
131 | link->nsyms = 0; | |
132 | } | |
133 | ||
134 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; | |
135 | } | |
136 | ||
137 | /* Find a symbol named NAME on a LIST. NAME need not be | |
138 | '\0'-terminated; LENGTH is the length of the name. */ | |
139 | ||
140 | struct symbol * | |
141 | find_symbol_in_list (struct pending *list, char *name, int length) | |
142 | { | |
143 | int j; | |
0d5cff50 | 144 | const char *pp; |
c906108c SS |
145 | |
146 | while (list != NULL) | |
147 | { | |
148 | for (j = list->nsyms; --j >= 0;) | |
149 | { | |
3567439c | 150 | pp = SYMBOL_LINKAGE_NAME (list->symbol[j]); |
5aafa1cc PM |
151 | if (*pp == *name && strncmp (pp, name, length) == 0 |
152 | && pp[length] == '\0') | |
c906108c SS |
153 | { |
154 | return (list->symbol[j]); | |
155 | } | |
156 | } | |
157 | list = list->next; | |
158 | } | |
159 | return (NULL); | |
160 | } | |
161 | ||
162 | /* At end of reading syms, or in case of quit, really free as many | |
4a64f543 | 163 | `struct pending's as we can easily find. */ |
c906108c | 164 | |
c906108c | 165 | void |
bde58177 | 166 | really_free_pendings (void *dummy) |
c906108c SS |
167 | { |
168 | struct pending *next, *next1; | |
169 | ||
170 | for (next = free_pendings; next; next = next1) | |
171 | { | |
172 | next1 = next->next; | |
b8c9b27d | 173 | xfree ((void *) next); |
c906108c SS |
174 | } |
175 | free_pendings = NULL; | |
176 | ||
177 | free_pending_blocks (); | |
178 | ||
179 | for (next = file_symbols; next != NULL; next = next1) | |
180 | { | |
181 | next1 = next->next; | |
b8c9b27d | 182 | xfree ((void *) next); |
c906108c SS |
183 | } |
184 | file_symbols = NULL; | |
185 | ||
186 | for (next = global_symbols; next != NULL; next = next1) | |
187 | { | |
188 | next1 = next->next; | |
b8c9b27d | 189 | xfree ((void *) next); |
c906108c SS |
190 | } |
191 | global_symbols = NULL; | |
99d9066e JB |
192 | |
193 | if (pending_macros) | |
194 | free_macro_table (pending_macros); | |
801e3a5b JB |
195 | |
196 | if (pending_addrmap) | |
197 | { | |
198 | obstack_free (&pending_addrmap_obstack, NULL); | |
199 | pending_addrmap = NULL; | |
200 | } | |
c906108c SS |
201 | } |
202 | ||
4a64f543 | 203 | /* This function is called to discard any pending blocks. */ |
c906108c SS |
204 | |
205 | void | |
206 | free_pending_blocks (void) | |
207 | { | |
89ba75b1 JB |
208 | /* The links are made in the objfile_obstack, so we only need to |
209 | reset PENDING_BLOCKS. */ | |
c906108c SS |
210 | pending_blocks = NULL; |
211 | } | |
212 | ||
213 | /* Take one of the lists of symbols and make a block from it. Keep | |
214 | the order the symbols have in the list (reversed from the input | |
215 | file). Put the block on the list of pending blocks. */ | |
216 | ||
84a146c9 TT |
217 | static struct block * |
218 | finish_block_internal (struct symbol *symbol, struct pending **listhead, | |
219 | struct pending_block *old_blocks, | |
220 | CORE_ADDR start, CORE_ADDR end, | |
221 | struct objfile *objfile, | |
6d30eef8 | 222 | int is_global, int expandable) |
c906108c | 223 | { |
5af949e3 | 224 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
52f0bd74 AC |
225 | struct pending *next, *next1; |
226 | struct block *block; | |
227 | struct pending_block *pblock; | |
c906108c | 228 | struct pending_block *opblock; |
c906108c | 229 | |
84a146c9 TT |
230 | block = (is_global |
231 | ? allocate_global_block (&objfile->objfile_obstack) | |
232 | : allocate_block (&objfile->objfile_obstack)); | |
c906108c | 233 | |
261397f8 DJ |
234 | if (symbol) |
235 | { | |
4a146b47 | 236 | BLOCK_DICT (block) = dict_create_linear (&objfile->objfile_obstack, |
de4f826b | 237 | *listhead); |
261397f8 DJ |
238 | } |
239 | else | |
c906108c | 240 | { |
6d30eef8 DE |
241 | if (expandable) |
242 | { | |
243 | BLOCK_DICT (block) = dict_create_hashed_expandable (); | |
244 | dict_add_pending (BLOCK_DICT (block), *listhead); | |
245 | } | |
246 | else | |
247 | { | |
248 | BLOCK_DICT (block) = | |
249 | dict_create_hashed (&objfile->objfile_obstack, *listhead); | |
250 | } | |
c906108c SS |
251 | } |
252 | ||
253 | BLOCK_START (block) = start; | |
254 | BLOCK_END (block) = end; | |
c906108c | 255 | |
c906108c SS |
256 | /* Put the block in as the value of the symbol that names it. */ |
257 | ||
258 | if (symbol) | |
259 | { | |
260 | struct type *ftype = SYMBOL_TYPE (symbol); | |
de4f826b | 261 | struct dict_iterator iter; |
c906108c SS |
262 | SYMBOL_BLOCK_VALUE (symbol) = block; |
263 | BLOCK_FUNCTION (block) = symbol; | |
264 | ||
265 | if (TYPE_NFIELDS (ftype) <= 0) | |
266 | { | |
267 | /* No parameter type information is recorded with the | |
268 | function's type. Set that from the type of the | |
4a64f543 | 269 | parameter symbols. */ |
c906108c SS |
270 | int nparams = 0, iparams; |
271 | struct symbol *sym; | |
8157b174 TT |
272 | |
273 | /* Here we want to directly access the dictionary, because | |
274 | we haven't fully initialized the block yet. */ | |
275 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 276 | { |
2a2d4dc3 AS |
277 | if (SYMBOL_IS_ARGUMENT (sym)) |
278 | nparams++; | |
c906108c SS |
279 | } |
280 | if (nparams > 0) | |
281 | { | |
282 | TYPE_NFIELDS (ftype) = nparams; | |
283 | TYPE_FIELDS (ftype) = (struct field *) | |
284 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); | |
285 | ||
de4f826b | 286 | iparams = 0; |
8157b174 TT |
287 | /* Here we want to directly access the dictionary, because |
288 | we haven't fully initialized the block yet. */ | |
289 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 290 | { |
de4f826b DC |
291 | if (iparams == nparams) |
292 | break; | |
293 | ||
2a2d4dc3 | 294 | if (SYMBOL_IS_ARGUMENT (sym)) |
c906108c | 295 | { |
c906108c | 296 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
8176bb6d | 297 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
c906108c | 298 | iparams++; |
c906108c SS |
299 | } |
300 | } | |
301 | } | |
302 | } | |
303 | } | |
304 | else | |
305 | { | |
306 | BLOCK_FUNCTION (block) = NULL; | |
307 | } | |
308 | ||
309 | /* Now "free" the links of the list, and empty the list. */ | |
310 | ||
311 | for (next = *listhead; next; next = next1) | |
312 | { | |
313 | next1 = next->next; | |
314 | next->next = free_pendings; | |
315 | free_pendings = next; | |
316 | } | |
317 | *listhead = NULL; | |
318 | ||
c906108c | 319 | /* Check to be sure that the blocks have an end address that is |
4a64f543 | 320 | greater than starting address. */ |
c906108c SS |
321 | |
322 | if (BLOCK_END (block) < BLOCK_START (block)) | |
323 | { | |
324 | if (symbol) | |
325 | { | |
23136709 | 326 | complaint (&symfile_complaints, |
3e43a32a MS |
327 | _("block end address less than block " |
328 | "start address in %s (patched it)"), | |
de5ad195 | 329 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
330 | } |
331 | else | |
332 | { | |
23136709 | 333 | complaint (&symfile_complaints, |
3e43a32a MS |
334 | _("block end address %s less than block " |
335 | "start address %s (patched it)"), | |
5af949e3 UW |
336 | paddress (gdbarch, BLOCK_END (block)), |
337 | paddress (gdbarch, BLOCK_START (block))); | |
c906108c | 338 | } |
4a64f543 | 339 | /* Better than nothing. */ |
c906108c SS |
340 | BLOCK_END (block) = BLOCK_START (block); |
341 | } | |
c906108c SS |
342 | |
343 | /* Install this block as the superblock of all blocks made since the | |
344 | start of this scope that don't have superblocks yet. */ | |
345 | ||
346 | opblock = NULL; | |
c0219d42 MS |
347 | for (pblock = pending_blocks; |
348 | pblock && pblock != old_blocks; | |
349 | pblock = pblock->next) | |
c906108c SS |
350 | { |
351 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) | |
352 | { | |
c906108c | 353 | /* Check to be sure the blocks are nested as we receive |
4a64f543 | 354 | them. If the compiler/assembler/linker work, this just |
14711c82 DJ |
355 | burns a small amount of time. |
356 | ||
357 | Skip blocks which correspond to a function; they're not | |
358 | physically nested inside this other blocks, only | |
359 | lexically nested. */ | |
360 | if (BLOCK_FUNCTION (pblock->block) == NULL | |
361 | && (BLOCK_START (pblock->block) < BLOCK_START (block) | |
362 | || BLOCK_END (pblock->block) > BLOCK_END (block))) | |
c906108c SS |
363 | { |
364 | if (symbol) | |
365 | { | |
23136709 | 366 | complaint (&symfile_complaints, |
3d263c1d | 367 | _("inner block not inside outer block in %s"), |
de5ad195 | 368 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
369 | } |
370 | else | |
371 | { | |
23136709 | 372 | complaint (&symfile_complaints, |
3e43a32a MS |
373 | _("inner block (%s-%s) not " |
374 | "inside outer block (%s-%s)"), | |
5af949e3 UW |
375 | paddress (gdbarch, BLOCK_START (pblock->block)), |
376 | paddress (gdbarch, BLOCK_END (pblock->block)), | |
377 | paddress (gdbarch, BLOCK_START (block)), | |
378 | paddress (gdbarch, BLOCK_END (block))); | |
c906108c SS |
379 | } |
380 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) | |
381 | BLOCK_START (pblock->block) = BLOCK_START (block); | |
382 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) | |
383 | BLOCK_END (pblock->block) = BLOCK_END (block); | |
384 | } | |
c906108c SS |
385 | BLOCK_SUPERBLOCK (pblock->block) = block; |
386 | } | |
387 | opblock = pblock; | |
388 | } | |
389 | ||
27aa8d6a | 390 | block_set_using (block, using_directives, &objfile->objfile_obstack); |
00ae8fef | 391 | using_directives = NULL; |
27aa8d6a | 392 | |
c906108c | 393 | record_pending_block (objfile, block, opblock); |
801e3a5b JB |
394 | |
395 | return block; | |
c906108c SS |
396 | } |
397 | ||
84a146c9 TT |
398 | struct block * |
399 | finish_block (struct symbol *symbol, struct pending **listhead, | |
400 | struct pending_block *old_blocks, | |
401 | CORE_ADDR start, CORE_ADDR end, | |
402 | struct objfile *objfile) | |
403 | { | |
404 | return finish_block_internal (symbol, listhead, old_blocks, | |
6d30eef8 | 405 | start, end, objfile, 0, 0); |
84a146c9 | 406 | } |
de4f826b | 407 | |
c906108c SS |
408 | /* Record BLOCK on the list of all blocks in the file. Put it after |
409 | OPBLOCK, or at the beginning if opblock is NULL. This puts the | |
410 | block in the list after all its subblocks. | |
411 | ||
4a146b47 | 412 | Allocate the pending block struct in the objfile_obstack to save |
c906108c SS |
413 | time. This wastes a little space. FIXME: Is it worth it? */ |
414 | ||
0b49e518 | 415 | static void |
c906108c SS |
416 | record_pending_block (struct objfile *objfile, struct block *block, |
417 | struct pending_block *opblock) | |
418 | { | |
52f0bd74 | 419 | struct pending_block *pblock; |
c906108c SS |
420 | |
421 | pblock = (struct pending_block *) | |
4a146b47 | 422 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct pending_block)); |
c906108c SS |
423 | pblock->block = block; |
424 | if (opblock) | |
425 | { | |
426 | pblock->next = opblock->next; | |
427 | opblock->next = pblock; | |
428 | } | |
429 | else | |
430 | { | |
431 | pblock->next = pending_blocks; | |
432 | pending_blocks = pblock; | |
433 | } | |
434 | } | |
435 | ||
801e3a5b JB |
436 | |
437 | /* Record that the range of addresses from START to END_INCLUSIVE | |
438 | (inclusive, like it says) belongs to BLOCK. BLOCK's start and end | |
439 | addresses must be set already. You must apply this function to all | |
440 | BLOCK's children before applying it to BLOCK. | |
441 | ||
442 | If a call to this function complicates the picture beyond that | |
443 | already provided by BLOCK_START and BLOCK_END, then we create an | |
444 | address map for the block. */ | |
445 | void | |
446 | record_block_range (struct block *block, | |
447 | CORE_ADDR start, CORE_ADDR end_inclusive) | |
448 | { | |
449 | /* If this is any different from the range recorded in the block's | |
450 | own BLOCK_START and BLOCK_END, then note that the address map has | |
451 | become interesting. Note that even if this block doesn't have | |
452 | any "interesting" ranges, some later block might, so we still | |
453 | need to record this block in the addrmap. */ | |
454 | if (start != BLOCK_START (block) | |
455 | || end_inclusive + 1 != BLOCK_END (block)) | |
456 | pending_addrmap_interesting = 1; | |
457 | ||
458 | if (! pending_addrmap) | |
459 | { | |
460 | obstack_init (&pending_addrmap_obstack); | |
461 | pending_addrmap = addrmap_create_mutable (&pending_addrmap_obstack); | |
462 | } | |
463 | ||
464 | addrmap_set_empty (pending_addrmap, start, end_inclusive, block); | |
465 | } | |
466 | ||
467 | ||
822e978b | 468 | static struct blockvector * |
c906108c SS |
469 | make_blockvector (struct objfile *objfile) |
470 | { | |
52f0bd74 AC |
471 | struct pending_block *next; |
472 | struct blockvector *blockvector; | |
473 | int i; | |
c906108c SS |
474 | |
475 | /* Count the length of the list of blocks. */ | |
476 | ||
477 | for (next = pending_blocks, i = 0; next; next = next->next, i++) | |
478 | {; | |
479 | } | |
480 | ||
481 | blockvector = (struct blockvector *) | |
4a146b47 | 482 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
483 | (sizeof (struct blockvector) |
484 | + (i - 1) * sizeof (struct block *))); | |
485 | ||
4a64f543 | 486 | /* Copy the blocks into the blockvector. This is done in reverse |
c906108c | 487 | order, which happens to put the blocks into the proper order |
4a64f543 | 488 | (ascending starting address). finish_block has hair to insert |
c906108c SS |
489 | each block into the list after its subblocks in order to make |
490 | sure this is true. */ | |
491 | ||
492 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
493 | for (next = pending_blocks; next; next = next->next) | |
494 | { | |
495 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
496 | } | |
497 | ||
89ba75b1 | 498 | free_pending_blocks (); |
c906108c | 499 | |
801e3a5b JB |
500 | /* If we needed an address map for this symtab, record it in the |
501 | blockvector. */ | |
502 | if (pending_addrmap && pending_addrmap_interesting) | |
503 | BLOCKVECTOR_MAP (blockvector) | |
504 | = addrmap_create_fixed (pending_addrmap, &objfile->objfile_obstack); | |
505 | else | |
506 | BLOCKVECTOR_MAP (blockvector) = 0; | |
4aad0dfc | 507 | |
c906108c | 508 | /* Some compilers output blocks in the wrong order, but we depend on |
4a64f543 | 509 | their being in the right order so we can binary search. Check the |
4aad0dfc DE |
510 | order and moan about it. |
511 | Note: Remember that the first two blocks are the global and static | |
512 | blocks. We could special case that fact and begin checking at block 2. | |
513 | To avoid making that assumption we do not. */ | |
c906108c SS |
514 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) |
515 | { | |
516 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) | |
517 | { | |
518 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) | |
519 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) | |
520 | { | |
59527da0 JB |
521 | CORE_ADDR start |
522 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); | |
c906108c | 523 | |
3d263c1d | 524 | complaint (&symfile_complaints, _("block at %s out of order"), |
bb599908 | 525 | hex_string ((LONGEST) start)); |
c906108c SS |
526 | } |
527 | } | |
528 | } | |
c906108c SS |
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 | |
4a64f543 MS |
536 | the directory in which the file was compiled (or NULL if not |
537 | known). */ | |
c906108c SS |
538 | |
539 | void | |
72b9f47f | 540 | start_subfile (const char *name, const char *dirname) |
c906108c | 541 | { |
52f0bd74 | 542 | struct subfile *subfile; |
c906108c SS |
543 | |
544 | /* See if this subfile is already known as a subfile of the current | |
545 | main source file. */ | |
546 | ||
547 | for (subfile = subfiles; subfile; subfile = subfile->next) | |
548 | { | |
84ba0adf DJ |
549 | char *subfile_name; |
550 | ||
551 | /* If NAME is an absolute path, and this subfile is not, then | |
552 | attempt to create an absolute path to compare. */ | |
553 | if (IS_ABSOLUTE_PATH (name) | |
554 | && !IS_ABSOLUTE_PATH (subfile->name) | |
555 | && subfile->dirname != NULL) | |
556 | subfile_name = concat (subfile->dirname, SLASH_STRING, | |
6eb7ee03 | 557 | subfile->name, (char *) NULL); |
84ba0adf DJ |
558 | else |
559 | subfile_name = subfile->name; | |
560 | ||
561 | if (FILENAME_CMP (subfile_name, name) == 0) | |
c906108c SS |
562 | { |
563 | current_subfile = subfile; | |
84ba0adf DJ |
564 | if (subfile_name != subfile->name) |
565 | xfree (subfile_name); | |
c906108c SS |
566 | return; |
567 | } | |
84ba0adf DJ |
568 | if (subfile_name != subfile->name) |
569 | xfree (subfile_name); | |
c906108c SS |
570 | } |
571 | ||
4a64f543 | 572 | /* This subfile is not known. Add an entry for it. Make an entry |
c906108c SS |
573 | for this subfile in the list of all subfiles of the current main |
574 | source file. */ | |
575 | ||
576 | subfile = (struct subfile *) xmalloc (sizeof (struct subfile)); | |
59527da0 | 577 | memset ((char *) subfile, 0, sizeof (struct subfile)); |
c906108c SS |
578 | subfile->next = subfiles; |
579 | subfiles = subfile; | |
580 | current_subfile = subfile; | |
581 | ||
4a64f543 | 582 | /* Save its name and compilation directory name. */ |
b74db436 | 583 | subfile->name = xstrdup (name); |
1b36a34b | 584 | subfile->dirname = (dirname == NULL) ? NULL : xstrdup (dirname); |
c906108c SS |
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 | |
4a64f543 | 598 | source file. */ |
c906108c SS |
599 | |
600 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
601 | if (subfile->language == language_unknown |
602 | && subfile->next != NULL) | |
c906108c SS |
603 | { |
604 | subfile->language = subfile->next->language; | |
605 | } | |
606 | ||
607 | /* Initialize the debug format string to NULL. We may supply it | |
4a64f543 | 608 | later via a call to record_debugformat. */ |
c906108c SS |
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 | |
4a64f543 | 650 | directory name actually is (by checking for a trailing '/'). */ |
c906108c SS |
651 | |
652 | void | |
653 | patch_subfile_names (struct subfile *subfile, char *name) | |
654 | { | |
655 | if (subfile != NULL && subfile->dirname == NULL && subfile->name != NULL | |
0ba1096a | 656 | && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1])) |
c906108c SS |
657 | { |
658 | subfile->dirname = subfile->name; | |
1b36a34b | 659 | subfile->name = xstrdup (name); |
c906108c SS |
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 | |
4a64f543 | 671 | symbols have been processed for a given source file. */ |
c906108c SS |
672 | |
673 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
674 | if (subfile->language == language_unknown |
675 | && subfile->next != NULL) | |
c906108c SS |
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 |
cc59ec59 | 691 | = (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack)); |
c906108c SS |
692 | |
693 | tem->next = subfile_stack; | |
694 | subfile_stack = tem; | |
695 | if (current_subfile == NULL || current_subfile->name == NULL) | |
696 | { | |
4a64f543 MS |
697 | internal_error (__FILE__, __LINE__, |
698 | _("failed internal consistency check")); | |
c906108c SS |
699 | } |
700 | tem->name = current_subfile->name; | |
701 | } | |
702 | ||
703 | char * | |
704 | pop_subfile (void) | |
705 | { | |
52f0bd74 AC |
706 | char *name; |
707 | struct subfile_stack *link = subfile_stack; | |
c906108c SS |
708 | |
709 | if (link == NULL) | |
710 | { | |
3e43a32a MS |
711 | internal_error (__FILE__, __LINE__, |
712 | _("failed internal consistency check")); | |
c906108c SS |
713 | } |
714 | name = link->name; | |
715 | subfile_stack = link->next; | |
b8c9b27d | 716 | xfree ((void *) link); |
c906108c SS |
717 | return (name); |
718 | } | |
719 | \f | |
720 | /* Add a linetable entry for line number LINE and address PC to the | |
721 | line vector for SUBFILE. */ | |
722 | ||
723 | void | |
aa1ee363 | 724 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
c906108c SS |
725 | { |
726 | struct linetable_entry *e; | |
c906108c | 727 | |
cc59ec59 | 728 | /* Ignore the dummy line number in libg.o */ |
c906108c SS |
729 | if (line == 0xffff) |
730 | { | |
731 | return; | |
732 | } | |
733 | ||
734 | /* Make sure line vector exists and is big enough. */ | |
735 | if (!subfile->line_vector) | |
736 | { | |
737 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; | |
738 | subfile->line_vector = (struct linetable *) | |
739 | xmalloc (sizeof (struct linetable) | |
c5aa993b | 740 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
c906108c SS |
741 | subfile->line_vector->nitems = 0; |
742 | have_line_numbers = 1; | |
743 | } | |
744 | ||
745 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) | |
746 | { | |
747 | subfile->line_vector_length *= 2; | |
748 | subfile->line_vector = (struct linetable *) | |
749 | xrealloc ((char *) subfile->line_vector, | |
750 | (sizeof (struct linetable) | |
751 | + (subfile->line_vector_length | |
752 | * sizeof (struct linetable_entry)))); | |
753 | } | |
754 | ||
607ae575 DJ |
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 | |
0b0287a1 DE |
807 | one original source file. |
808 | ||
809 | NAME is the name of the file (cannot be NULL). DIRNAME is the directory in | |
810 | which the file was compiled (or NULL if not known). START_ADDR is the | |
811 | lowest address of objects in the file (or 0 if not known). */ | |
c906108c SS |
812 | |
813 | void | |
814 | start_symtab (char *name, char *dirname, CORE_ADDR start_addr) | |
815 | { | |
6d30eef8 | 816 | restart_symtab (start_addr); |
c906108c | 817 | last_source_file = name; |
6d30eef8 DE |
818 | start_subfile (name, dirname); |
819 | } | |
820 | ||
821 | /* Restart compilation for a symtab. | |
822 | This is used when a symtab is built from multiple sources. | |
823 | The symtab is first built with start_symtab and then for each additional | |
824 | piece call restart_symtab. */ | |
825 | ||
826 | void | |
827 | restart_symtab (CORE_ADDR start_addr) | |
828 | { | |
829 | last_source_file = NULL; | |
c906108c SS |
830 | last_source_start_addr = start_addr; |
831 | file_symbols = NULL; | |
832 | global_symbols = NULL; | |
833 | within_function = 0; | |
834 | have_line_numbers = 0; | |
835 | ||
836 | /* Context stack is initially empty. Allocate first one with room | |
837 | for 10 levels; reuse it forever afterward. */ | |
838 | if (context_stack == NULL) | |
839 | { | |
840 | context_stack_size = INITIAL_CONTEXT_STACK_SIZE; | |
841 | context_stack = (struct context_stack *) | |
842 | xmalloc (context_stack_size * sizeof (struct context_stack)); | |
843 | } | |
844 | context_stack_depth = 0; | |
845 | ||
801e3a5b JB |
846 | /* We shouldn't have any address map at this point. */ |
847 | gdb_assert (! pending_addrmap); | |
848 | ||
c906108c SS |
849 | /* Initialize the list of sub source files with one entry for this |
850 | file (the top-level source file). */ | |
c906108c SS |
851 | subfiles = NULL; |
852 | current_subfile = NULL; | |
c906108c SS |
853 | } |
854 | ||
4a64f543 MS |
855 | /* Subroutine of end_symtab to simplify it. Look for a subfile that |
856 | matches the main source file's basename. If there is only one, and | |
857 | if the main source file doesn't have any symbol or line number | |
858 | information, then copy this file's symtab and line_vector to the | |
859 | main source file's subfile and discard the other subfile. This can | |
860 | happen because of a compiler bug or from the user playing games | |
861 | with #line or from things like a distributed build system that | |
862 | manipulates the debug info. */ | |
4584e32e DE |
863 | |
864 | static void | |
865 | watch_main_source_file_lossage (void) | |
866 | { | |
867 | struct subfile *mainsub, *subfile; | |
868 | ||
869 | /* Find the main source file. | |
870 | This loop could be eliminated if start_symtab saved it for us. */ | |
871 | mainsub = NULL; | |
872 | for (subfile = subfiles; subfile; subfile = subfile->next) | |
873 | { | |
874 | /* The main subfile is guaranteed to be the last one. */ | |
875 | if (subfile->next == NULL) | |
876 | mainsub = subfile; | |
877 | } | |
878 | ||
4a64f543 MS |
879 | /* If the main source file doesn't have any line number or symbol |
880 | info, look for an alias in another subfile. | |
881 | ||
882 | We have to watch for mainsub == NULL here. It's a quirk of | |
883 | end_symtab, it can return NULL so there may not be a main | |
884 | subfile. */ | |
4584e32e DE |
885 | |
886 | if (mainsub | |
887 | && mainsub->line_vector == NULL | |
888 | && mainsub->symtab == NULL) | |
889 | { | |
890 | const char *mainbase = lbasename (mainsub->name); | |
891 | int nr_matches = 0; | |
892 | struct subfile *prevsub; | |
893 | struct subfile *mainsub_alias = NULL; | |
894 | struct subfile *prev_mainsub_alias = NULL; | |
895 | ||
896 | prevsub = NULL; | |
897 | for (subfile = subfiles; | |
898 | /* Stop before we get to the last one. */ | |
899 | subfile->next; | |
900 | subfile = subfile->next) | |
901 | { | |
0ba1096a | 902 | if (filename_cmp (lbasename (subfile->name), mainbase) == 0) |
4584e32e DE |
903 | { |
904 | ++nr_matches; | |
905 | mainsub_alias = subfile; | |
906 | prev_mainsub_alias = prevsub; | |
907 | } | |
908 | prevsub = subfile; | |
909 | } | |
910 | ||
911 | if (nr_matches == 1) | |
912 | { | |
913 | gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub); | |
914 | ||
915 | /* Found a match for the main source file. | |
916 | Copy its line_vector and symtab to the main subfile | |
917 | and then discard it. */ | |
918 | ||
919 | mainsub->line_vector = mainsub_alias->line_vector; | |
920 | mainsub->line_vector_length = mainsub_alias->line_vector_length; | |
921 | mainsub->symtab = mainsub_alias->symtab; | |
922 | ||
923 | if (prev_mainsub_alias == NULL) | |
924 | subfiles = mainsub_alias->next; | |
925 | else | |
926 | prev_mainsub_alias->next = mainsub_alias->next; | |
927 | xfree (mainsub_alias); | |
928 | } | |
929 | } | |
930 | } | |
931 | ||
98cc87bd | 932 | /* Helper function for qsort. Parameters are `struct block *' pointers, |
07e7f39f JK |
933 | function sorts them in descending order by their BLOCK_START. */ |
934 | ||
935 | static int | |
936 | block_compar (const void *ap, const void *bp) | |
937 | { | |
938 | const struct block *a = *(const struct block **) ap; | |
939 | const struct block *b = *(const struct block **) bp; | |
940 | ||
941 | return ((BLOCK_START (b) > BLOCK_START (a)) | |
942 | - (BLOCK_START (b) < BLOCK_START (a))); | |
943 | } | |
944 | ||
6d30eef8 DE |
945 | /* Reset globals used to build symtabs. */ |
946 | ||
947 | static void | |
948 | reset_symtab_globals (void) | |
949 | { | |
950 | last_source_file = NULL; | |
951 | current_subfile = NULL; | |
952 | pending_macros = NULL; | |
953 | if (pending_addrmap) | |
954 | { | |
955 | obstack_free (&pending_addrmap_obstack, NULL); | |
956 | pending_addrmap = NULL; | |
957 | } | |
958 | } | |
959 | ||
4359dff1 JK |
960 | /* Implementation of the first part of end_symtab. It allows modifying |
961 | STATIC_BLOCK before it gets finalized by end_symtab_from_static_block. | |
962 | If the returned value is NULL there is no blockvector created for | |
963 | this symtab (you still must call end_symtab_from_static_block). | |
c906108c | 964 | |
4359dff1 JK |
965 | END_ADDR is the same as for end_symtab: the address of the end of the |
966 | file's text. | |
c906108c | 967 | |
4359dff1 | 968 | If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made |
36586728 TT |
969 | expandable. |
970 | ||
971 | If REQUIRED is non-zero, then a symtab is created even if it does | |
972 | not contain any symbols. */ | |
6d30eef8 | 973 | |
4359dff1 JK |
974 | struct block * |
975 | end_symtab_get_static_block (CORE_ADDR end_addr, struct objfile *objfile, | |
36586728 | 976 | int expandable, int required) |
c906108c | 977 | { |
c906108c SS |
978 | /* Finish the lexical context of the last function in the file; pop |
979 | the context stack. */ | |
980 | ||
981 | if (context_stack_depth > 0) | |
982 | { | |
4359dff1 JK |
983 | struct context_stack *cstk = pop_context (); |
984 | ||
c906108c SS |
985 | /* Make a block for the local symbols within. */ |
986 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
987 | cstk->start_addr, end_addr, objfile); | |
988 | ||
989 | if (context_stack_depth > 0) | |
990 | { | |
991 | /* This is said to happen with SCO. The old coffread.c | |
992 | code simply emptied the context stack, so we do the | |
993 | same. FIXME: Find out why it is happening. This is not | |
994 | believed to happen in most cases (even for coffread.c); | |
995 | it used to be an abort(). */ | |
23136709 | 996 | complaint (&symfile_complaints, |
3d263c1d | 997 | _("Context stack not empty in end_symtab")); |
c906108c SS |
998 | context_stack_depth = 0; |
999 | } | |
1000 | } | |
1001 | ||
1002 | /* Reordered executables may have out of order pending blocks; if | |
1003 | OBJF_REORDERED is true, then sort the pending blocks. */ | |
6d30eef8 | 1004 | |
c906108c SS |
1005 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) |
1006 | { | |
07e7f39f JK |
1007 | unsigned count = 0; |
1008 | struct pending_block *pb; | |
1009 | struct block **barray, **bp; | |
1010 | struct cleanup *back_to; | |
c906108c | 1011 | |
07e7f39f JK |
1012 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
1013 | count++; | |
c906108c | 1014 | |
07e7f39f JK |
1015 | barray = xmalloc (sizeof (*barray) * count); |
1016 | back_to = make_cleanup (xfree, barray); | |
c906108c | 1017 | |
07e7f39f JK |
1018 | bp = barray; |
1019 | for (pb = pending_blocks; pb != NULL; pb = pb->next) | |
1020 | *bp++ = pb->block; | |
1021 | ||
1022 | qsort (barray, count, sizeof (*barray), block_compar); | |
1023 | ||
1024 | bp = barray; | |
1025 | for (pb = pending_blocks; pb != NULL; pb = pb->next) | |
1026 | pb->block = *bp++; | |
1027 | ||
1028 | do_cleanups (back_to); | |
c906108c SS |
1029 | } |
1030 | ||
1031 | /* Cleanup any undefined types that have been left hanging around | |
1032 | (this needs to be done before the finish_blocks so that | |
1033 | file_symbols is still good). | |
c5aa993b | 1034 | |
0a0edcd5 | 1035 | Both cleanup_undefined_stabs_types and finish_global_stabs are stabs |
c906108c SS |
1036 | specific, but harmless for other symbol readers, since on gdb |
1037 | startup or when finished reading stabs, the state is set so these | |
1038 | are no-ops. FIXME: Is this handled right in case of QUIT? Can | |
1039 | we make this cleaner? */ | |
1040 | ||
0a0edcd5 | 1041 | cleanup_undefined_stabs_types (objfile); |
c906108c SS |
1042 | finish_global_stabs (objfile); |
1043 | ||
36586728 TT |
1044 | if (!required |
1045 | && pending_blocks == NULL | |
c906108c SS |
1046 | && file_symbols == NULL |
1047 | && global_symbols == NULL | |
99d9066e JB |
1048 | && have_line_numbers == 0 |
1049 | && pending_macros == NULL) | |
c906108c | 1050 | { |
4359dff1 JK |
1051 | /* Ignore symtabs that have no functions with real debugging info. */ |
1052 | return NULL; | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | /* Define the STATIC_BLOCK. */ | |
1057 | return finish_block_internal (NULL, &file_symbols, NULL, | |
1058 | last_source_start_addr, end_addr, objfile, | |
1059 | 0, expandable); | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK | |
1064 | as value returned by end_symtab_get_static_block. | |
1065 | ||
1066 | SECTION is the same as for end_symtab: the section number | |
1067 | (in objfile->section_offsets) of the blockvector and linetable. | |
1068 | ||
1069 | If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made | |
1070 | expandable. */ | |
1071 | ||
1072 | struct symtab * | |
1073 | end_symtab_from_static_block (struct block *static_block, | |
1074 | struct objfile *objfile, int section, | |
1075 | int expandable) | |
1076 | { | |
1077 | struct symtab *symtab = NULL; | |
1078 | struct blockvector *blockvector; | |
1079 | struct subfile *subfile; | |
1080 | struct subfile *nextsub; | |
1081 | ||
1082 | if (static_block == NULL) | |
1083 | { | |
1084 | /* Ignore symtabs that have no functions with real debugging info. */ | |
c906108c SS |
1085 | blockvector = NULL; |
1086 | } | |
1087 | else | |
1088 | { | |
4359dff1 JK |
1089 | CORE_ADDR end_addr = BLOCK_END (static_block); |
1090 | ||
1091 | /* Define after STATIC_BLOCK also GLOBAL_BLOCK, and build the | |
c906108c | 1092 | blockvector. */ |
4359dff1 JK |
1093 | finish_block_internal (NULL, &global_symbols, NULL, |
1094 | last_source_start_addr, end_addr, objfile, | |
1095 | 1, expandable); | |
c906108c SS |
1096 | blockvector = make_blockvector (objfile); |
1097 | } | |
1098 | ||
c295b2e5 JB |
1099 | /* Read the line table if it has to be read separately. */ |
1100 | if (objfile->sf->sym_read_linetable != NULL) | |
1101 | objfile->sf->sym_read_linetable (); | |
c906108c | 1102 | |
4584e32e DE |
1103 | /* Handle the case where the debug info specifies a different path |
1104 | for the main source file. It can cause us to lose track of its | |
1105 | line number information. */ | |
1106 | watch_main_source_file_lossage (); | |
1107 | ||
c906108c SS |
1108 | /* Now create the symtab objects proper, one for each subfile. */ |
1109 | /* (The main file is the last one on the chain.) */ | |
1110 | ||
1111 | for (subfile = subfiles; subfile; subfile = nextsub) | |
1112 | { | |
1113 | int linetablesize = 0; | |
1114 | symtab = NULL; | |
1115 | ||
4a64f543 | 1116 | /* If we have blocks of symbols, make a symtab. Otherwise, just |
c906108c SS |
1117 | ignore this file and any line number info in it. */ |
1118 | if (blockvector) | |
1119 | { | |
1120 | if (subfile->line_vector) | |
1121 | { | |
1122 | linetablesize = sizeof (struct linetable) + | |
1123 | subfile->line_vector->nitems * sizeof (struct linetable_entry); | |
c906108c SS |
1124 | |
1125 | /* Like the pending blocks, the line table may be | |
1126 | scrambled in reordered executables. Sort it if | |
1127 | OBJF_REORDERED is true. */ | |
1128 | if (objfile->flags & OBJF_REORDERED) | |
1129 | qsort (subfile->line_vector->item, | |
1130 | subfile->line_vector->nitems, | |
c5aa993b | 1131 | sizeof (struct linetable_entry), compare_line_numbers); |
c906108c SS |
1132 | } |
1133 | ||
1134 | /* Now, allocate a symbol table. */ | |
cb1df416 DJ |
1135 | if (subfile->symtab == NULL) |
1136 | symtab = allocate_symtab (subfile->name, objfile); | |
1137 | else | |
1138 | symtab = subfile->symtab; | |
c906108c SS |
1139 | |
1140 | /* Fill in its components. */ | |
1141 | symtab->blockvector = blockvector; | |
99d9066e | 1142 | symtab->macro_table = pending_macros; |
c906108c SS |
1143 | if (subfile->line_vector) |
1144 | { | |
4a64f543 | 1145 | /* Reallocate the line table on the symbol obstack. */ |
c906108c | 1146 | symtab->linetable = (struct linetable *) |
4a146b47 | 1147 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
c906108c SS |
1148 | memcpy (symtab->linetable, subfile->line_vector, linetablesize); |
1149 | } | |
1150 | else | |
1151 | { | |
1152 | symtab->linetable = NULL; | |
1153 | } | |
1154 | symtab->block_line_section = section; | |
1155 | if (subfile->dirname) | |
1156 | { | |
4a64f543 | 1157 | /* Reallocate the dirname on the symbol obstack. */ |
c906108c | 1158 | symtab->dirname = (char *) |
4a146b47 | 1159 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
1160 | strlen (subfile->dirname) + 1); |
1161 | strcpy (symtab->dirname, subfile->dirname); | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | symtab->dirname = NULL; | |
1166 | } | |
c906108c SS |
1167 | |
1168 | /* Use whatever language we have been using for this | |
1169 | subfile, not the one that was deduced in allocate_symtab | |
1170 | from the filename. We already did our own deducing when | |
1171 | we created the subfile, and we may have altered our | |
1172 | opinion of what language it is from things we found in | |
4a64f543 | 1173 | the symbols. */ |
c906108c SS |
1174 | symtab->language = subfile->language; |
1175 | ||
9182c5bc JK |
1176 | /* Save the debug format string (if any) in the symtab. */ |
1177 | symtab->debugformat = subfile->debugformat; | |
1178 | ||
1179 | /* Similarly for the producer. */ | |
1180 | symtab->producer = subfile->producer; | |
1181 | ||
c906108c SS |
1182 | /* All symtabs for the main file and the subfiles share a |
1183 | blockvector, so we need to clear primary for everything | |
1184 | but the main file. */ | |
1185 | ||
1186 | symtab->primary = 0; | |
1187 | } | |
24be086d JB |
1188 | else |
1189 | { | |
1190 | if (subfile->symtab) | |
1191 | { | |
1192 | /* Since we are ignoring that subfile, we also need | |
1193 | to unlink the associated empty symtab that we created. | |
98cc87bd | 1194 | Otherwise, we can run into trouble because various parts |
24be086d JB |
1195 | such as the block-vector are uninitialized whereas |
1196 | the rest of the code assumes that they are. | |
1197 | ||
1198 | We can only unlink the symtab because it was allocated | |
1199 | on the objfile obstack. */ | |
1200 | struct symtab *s; | |
1201 | ||
1202 | if (objfile->symtabs == subfile->symtab) | |
1203 | objfile->symtabs = objfile->symtabs->next; | |
1204 | else | |
1205 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1206 | if (s->next == subfile->symtab) | |
1207 | { | |
1208 | s->next = s->next->next; | |
1209 | break; | |
1210 | } | |
1211 | subfile->symtab = NULL; | |
1212 | } | |
1213 | } | |
c906108c SS |
1214 | if (subfile->name != NULL) |
1215 | { | |
b8c9b27d | 1216 | xfree ((void *) subfile->name); |
c906108c SS |
1217 | } |
1218 | if (subfile->dirname != NULL) | |
1219 | { | |
b8c9b27d | 1220 | xfree ((void *) subfile->dirname); |
c906108c SS |
1221 | } |
1222 | if (subfile->line_vector != NULL) | |
1223 | { | |
b8c9b27d | 1224 | xfree ((void *) subfile->line_vector); |
c906108c | 1225 | } |
c906108c SS |
1226 | |
1227 | nextsub = subfile->next; | |
b8c9b27d | 1228 | xfree ((void *) subfile); |
c906108c SS |
1229 | } |
1230 | ||
1231 | /* Set this for the main source file. */ | |
1232 | if (symtab) | |
1233 | { | |
1234 | symtab->primary = 1; | |
84a146c9 TT |
1235 | |
1236 | if (symtab->blockvector) | |
1237 | { | |
1238 | struct block *b = BLOCKVECTOR_BLOCK (symtab->blockvector, | |
1239 | GLOBAL_BLOCK); | |
1240 | ||
1241 | set_block_symtab (b, symtab); | |
1242 | } | |
c906108c SS |
1243 | } |
1244 | ||
cb1df416 DJ |
1245 | /* Default any symbols without a specified symtab to the primary |
1246 | symtab. */ | |
1247 | if (blockvector) | |
1248 | { | |
1249 | int block_i; | |
1250 | ||
1251 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) | |
1252 | { | |
1253 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); | |
1254 | struct symbol *sym; | |
1255 | struct dict_iterator iter; | |
1256 | ||
4a64f543 MS |
1257 | /* Inlined functions may have symbols not in the global or |
1258 | static symbol lists. */ | |
edb3359d DJ |
1259 | if (BLOCK_FUNCTION (block) != NULL) |
1260 | if (SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) == NULL) | |
1261 | SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) = symtab; | |
1262 | ||
8157b174 | 1263 | /* Note that we only want to fix up symbols from the local |
98cc87bd DE |
1264 | blocks, not blocks coming from included symtabs. That is why |
1265 | we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */ | |
8157b174 | 1266 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) |
cb1df416 DJ |
1267 | if (SYMBOL_SYMTAB (sym) == NULL) |
1268 | SYMBOL_SYMTAB (sym) = symtab; | |
1269 | } | |
1270 | } | |
1271 | ||
6d30eef8 DE |
1272 | reset_symtab_globals (); |
1273 | ||
1274 | return symtab; | |
1275 | } | |
1276 | ||
4359dff1 JK |
1277 | /* Finish the symbol definitions for one main source file, close off |
1278 | all the lexical contexts for that file (creating struct block's for | |
1279 | them), then make the struct symtab for that file and put it in the | |
1280 | list of all such. | |
1281 | ||
1282 | END_ADDR is the address of the end of the file's text. SECTION is | |
1283 | the section number (in objfile->section_offsets) of the blockvector | |
1284 | and linetable. | |
1285 | ||
1286 | Note that it is possible for end_symtab() to return NULL. In | |
1287 | particular, for the DWARF case at least, it will return NULL when | |
1288 | it finds a compilation unit that has exactly one DIE, a | |
1289 | TAG_compile_unit DIE. This can happen when we link in an object | |
1290 | file that was compiled from an empty source file. Returning NULL | |
1291 | is probably not the correct thing to do, because then gdb will | |
1292 | never know about this empty file (FIXME). | |
1293 | ||
1294 | If you need to modify STATIC_BLOCK before it is finalized you should | |
1295 | call end_symtab_get_static_block and end_symtab_from_static_block | |
1296 | yourself. */ | |
6d30eef8 DE |
1297 | |
1298 | struct symtab * | |
1299 | end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section) | |
1300 | { | |
4359dff1 JK |
1301 | struct block *static_block; |
1302 | ||
36586728 | 1303 | static_block = end_symtab_get_static_block (end_addr, objfile, 0, 0); |
4359dff1 | 1304 | return end_symtab_from_static_block (static_block, objfile, section, 0); |
6d30eef8 DE |
1305 | } |
1306 | ||
4359dff1 | 1307 | /* Same as end_symtab except create a symtab that can be later added to. */ |
6d30eef8 DE |
1308 | |
1309 | struct symtab * | |
1310 | end_expandable_symtab (CORE_ADDR end_addr, struct objfile *objfile, | |
1311 | int section) | |
1312 | { | |
4359dff1 JK |
1313 | struct block *static_block; |
1314 | ||
36586728 | 1315 | static_block = end_symtab_get_static_block (end_addr, objfile, 1, 0); |
4359dff1 | 1316 | return end_symtab_from_static_block (static_block, objfile, section, 1); |
6d30eef8 DE |
1317 | } |
1318 | ||
1319 | /* Subroutine of augment_type_symtab to simplify it. | |
1320 | Attach SYMTAB to all symbols in PENDING_LIST that don't have one. */ | |
1321 | ||
1322 | static void | |
1323 | set_missing_symtab (struct pending *pending_list, struct symtab *symtab) | |
1324 | { | |
1325 | struct pending *pending; | |
1326 | int i; | |
1327 | ||
1328 | for (pending = pending_list; pending != NULL; pending = pending->next) | |
801e3a5b | 1329 | { |
6d30eef8 DE |
1330 | for (i = 0; i < pending->nsyms; ++i) |
1331 | { | |
1332 | if (SYMBOL_SYMTAB (pending->symbol[i]) == NULL) | |
1333 | SYMBOL_SYMTAB (pending->symbol[i]) = symtab; | |
1334 | } | |
801e3a5b | 1335 | } |
6d30eef8 | 1336 | } |
c906108c | 1337 | |
6d30eef8 DE |
1338 | /* Same as end_symtab, but for the case where we're adding more symbols |
1339 | to an existing symtab that is known to contain only type information. | |
1340 | This is the case for DWARF4 Type Units. */ | |
1341 | ||
1342 | void | |
1343 | augment_type_symtab (struct objfile *objfile, struct symtab *primary_symtab) | |
1344 | { | |
1345 | struct blockvector *blockvector = primary_symtab->blockvector; | |
1346 | int i; | |
1347 | ||
1348 | if (context_stack_depth > 0) | |
1349 | { | |
1350 | complaint (&symfile_complaints, | |
1351 | _("Context stack not empty in augment_type_symtab")); | |
1352 | context_stack_depth = 0; | |
1353 | } | |
1354 | if (pending_blocks != NULL) | |
1355 | complaint (&symfile_complaints, _("Blocks in a type symtab")); | |
1356 | if (pending_macros != NULL) | |
1357 | complaint (&symfile_complaints, _("Macro in a type symtab")); | |
1358 | if (have_line_numbers) | |
1359 | complaint (&symfile_complaints, | |
1360 | _("Line numbers recorded in a type symtab")); | |
1361 | ||
1362 | if (file_symbols != NULL) | |
1363 | { | |
1364 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK); | |
1365 | ||
1366 | /* First mark any symbols without a specified symtab as belonging | |
1367 | to the primary symtab. */ | |
1368 | set_missing_symtab (file_symbols, primary_symtab); | |
1369 | ||
1370 | dict_add_pending (BLOCK_DICT (block), file_symbols); | |
1371 | } | |
1372 | ||
1373 | if (global_symbols != NULL) | |
1374 | { | |
1375 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); | |
1376 | ||
1377 | /* First mark any symbols without a specified symtab as belonging | |
1378 | to the primary symtab. */ | |
1379 | set_missing_symtab (global_symbols, primary_symtab); | |
1380 | ||
1381 | dict_add_pending (BLOCK_DICT (block), global_symbols); | |
1382 | } | |
1383 | ||
1384 | reset_symtab_globals (); | |
c906108c SS |
1385 | } |
1386 | ||
1387 | /* Push a context block. Args are an identifying nesting level | |
1388 | (checkable when you pop it), and the starting PC address of this | |
1389 | context. */ | |
1390 | ||
1391 | struct context_stack * | |
1392 | push_context (int desc, CORE_ADDR valu) | |
1393 | { | |
52f0bd74 | 1394 | struct context_stack *new; |
c906108c SS |
1395 | |
1396 | if (context_stack_depth == context_stack_size) | |
1397 | { | |
1398 | context_stack_size *= 2; | |
1399 | context_stack = (struct context_stack *) | |
1400 | xrealloc ((char *) context_stack, | |
c5aa993b | 1401 | (context_stack_size * sizeof (struct context_stack))); |
c906108c SS |
1402 | } |
1403 | ||
1404 | new = &context_stack[context_stack_depth++]; | |
1405 | new->depth = desc; | |
1406 | new->locals = local_symbols; | |
c906108c SS |
1407 | new->old_blocks = pending_blocks; |
1408 | new->start_addr = valu; | |
27aa8d6a | 1409 | new->using_directives = using_directives; |
c906108c SS |
1410 | new->name = NULL; |
1411 | ||
1412 | local_symbols = NULL; | |
27aa8d6a | 1413 | using_directives = NULL; |
c906108c SS |
1414 | |
1415 | return new; | |
1416 | } | |
0c5e171a | 1417 | |
a672ef13 | 1418 | /* Pop a context block. Returns the address of the context block just |
4a64f543 | 1419 | popped. */ |
a672ef13 | 1420 | |
0c5e171a KD |
1421 | struct context_stack * |
1422 | pop_context (void) | |
1423 | { | |
1424 | gdb_assert (context_stack_depth > 0); | |
1425 | return (&context_stack[--context_stack_depth]); | |
1426 | } | |
1427 | ||
c906108c | 1428 | \f |
357e46e7 | 1429 | |
4a64f543 | 1430 | /* Compute a small integer hash code for the given name. */ |
c906108c SS |
1431 | |
1432 | int | |
0d5cff50 | 1433 | hashname (const char *name) |
c906108c | 1434 | { |
357e46e7 | 1435 | return (hash(name,strlen(name)) % HASHSIZE); |
c906108c SS |
1436 | } |
1437 | \f | |
1438 | ||
1439 | void | |
554d387d | 1440 | record_debugformat (const char *format) |
c906108c | 1441 | { |
554d387d | 1442 | current_subfile->debugformat = format; |
c906108c SS |
1443 | } |
1444 | ||
303b6f5d DJ |
1445 | void |
1446 | record_producer (const char *producer) | |
1447 | { | |
554d387d | 1448 | current_subfile->producer = producer; |
303b6f5d DJ |
1449 | } |
1450 | ||
c906108c SS |
1451 | /* Merge the first symbol list SRCLIST into the second symbol list |
1452 | TARGETLIST by repeated calls to add_symbol_to_list(). This | |
1453 | procedure "frees" each link of SRCLIST by adding it to the | |
1454 | free_pendings list. Caller must set SRCLIST to a null list after | |
1455 | calling this function. | |
1456 | ||
4a64f543 | 1457 | Void return. */ |
c906108c SS |
1458 | |
1459 | void | |
1460 | merge_symbol_lists (struct pending **srclist, struct pending **targetlist) | |
1461 | { | |
52f0bd74 | 1462 | int i; |
c906108c SS |
1463 | |
1464 | if (!srclist || !*srclist) | |
1465 | return; | |
1466 | ||
1467 | /* Merge in elements from current link. */ | |
1468 | for (i = 0; i < (*srclist)->nsyms; i++) | |
1469 | add_symbol_to_list ((*srclist)->symbol[i], targetlist); | |
1470 | ||
1471 | /* Recurse on next. */ | |
1472 | merge_symbol_lists (&(*srclist)->next, targetlist); | |
1473 | ||
1474 | /* "Free" the current link. */ | |
1475 | (*srclist)->next = free_pendings; | |
1476 | free_pendings = (*srclist); | |
1477 | } | |
1478 | \f | |
1479 | /* Initialize anything that needs initializing when starting to read a | |
1480 | fresh piece of a symbol file, e.g. reading in the stuff | |
1481 | corresponding to a psymtab. */ | |
1482 | ||
1483 | void | |
fba45db2 | 1484 | buildsym_init (void) |
c906108c SS |
1485 | { |
1486 | free_pendings = NULL; | |
1487 | file_symbols = NULL; | |
1488 | global_symbols = NULL; | |
1489 | pending_blocks = NULL; | |
99d9066e | 1490 | pending_macros = NULL; |
aa14df25 | 1491 | using_directives = NULL; |
801e3a5b JB |
1492 | |
1493 | /* We shouldn't have any address map at this point. */ | |
1494 | gdb_assert (! pending_addrmap); | |
1495 | pending_addrmap_interesting = 0; | |
c906108c SS |
1496 | } |
1497 | ||
1498 | /* Initialize anything that needs initializing when a completely new | |
1499 | symbol file is specified (not just adding some symbols from another | |
1500 | file, e.g. a shared library). */ | |
1501 | ||
1502 | void | |
fba45db2 | 1503 | buildsym_new_init (void) |
c906108c SS |
1504 | { |
1505 | buildsym_init (); | |
1506 | } |