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bd5635a1 RP |
1 | /* Generic symbol file reading for the GNU debugger, GDB. |
2 | Copyright 1990, 1991 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
61a7292f | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
61a7292f SG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
61a7292f | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
61a7292f SG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
20 | |
21 | #include <stdio.h> | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
bd5635a1 RP |
24 | #include "gdbcore.h" |
25 | #include "frame.h" | |
26 | #include "target.h" | |
27 | #include "value.h" | |
28 | #include "symfile.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "breakpoint.h" | |
31 | ||
32 | #include <obstack.h> | |
33 | #include <assert.h> | |
34 | ||
35 | #include <sys/types.h> | |
36 | #include <fcntl.h> | |
37 | #include <string.h> | |
38 | #include <sys/stat.h> | |
39 | ||
d47d5315 JG |
40 | CORE_ADDR entry_point; /* Where execution starts in symfile */ |
41 | ||
bd5635a1 RP |
42 | extern int info_verbose; |
43 | ||
bd5635a1 RP |
44 | extern void qsort (); |
45 | extern char *getenv (); | |
d8ce1326 | 46 | extern char *rindex (); |
bd5635a1 | 47 | |
d47d5315 JG |
48 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ |
49 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
50 | ||
bd5635a1 | 51 | /* Functions this file defines */ |
7d9884b9 JG |
52 | static struct objfile *symfile_open (); |
53 | static struct sym_fns *symfile_init (); | |
54 | static void clear_symtab_users_once (); | |
55 | ||
56 | static void free_all_psymtabs (); | |
57 | static void free_all_symtabs (); | |
bd5635a1 RP |
58 | |
59 | /* List of all available sym_fns. */ | |
60 | ||
61 | struct sym_fns *symtab_fns = NULL; | |
62 | ||
63 | /* Saves the sym_fns of the current symbol table, so we can call | |
61a7292f SG |
64 | the right XXX_new_init function when we free it. FIXME. This |
65 | should be extended to calling the new_init function for each | |
66 | existing symtab or psymtab, since the main symbol file and | |
67 | subsequent added symbol files can have different types. */ | |
bd5635a1 RP |
68 | |
69 | static struct sym_fns *symfile_fns; | |
70 | ||
71 | /* Allocate an obstack to hold objects that should be freed | |
72 | when we load a new symbol table. | |
73 | This includes the symbols made by dbxread | |
74 | and the types that are not permanent. */ | |
75 | ||
76 | struct obstack obstack1; | |
77 | ||
78 | struct obstack *symbol_obstack = &obstack1; | |
79 | ||
80 | /* This obstack will be used for partial_symbol objects. It can | |
81 | probably actually be the same as the symbol_obstack above, but I'd | |
82 | like to keep them seperate for now. If I want to later, I'll | |
83 | replace one with the other. */ | |
84 | ||
85 | struct obstack obstack2; | |
86 | ||
87 | struct obstack *psymbol_obstack = &obstack2; | |
88 | ||
7d9884b9 JG |
89 | /* The object file that the main symbol table was loaded from (e.g. the |
90 | argument to the "symbol-file" or "file" command). */ | |
bd5635a1 | 91 | |
7d9884b9 | 92 | struct objfile *symfile_objfile = 0; |
bd5635a1 RP |
93 | |
94 | /* Structures with which to manage partial symbol allocation. */ | |
95 | ||
96 | struct psymbol_allocation_list global_psymbols = {0}, static_psymbols = {0}; | |
97 | ||
61a7292f SG |
98 | /* Flag for whether user will be reloading symbols multiple times. |
99 | Defaults to ON for VxWorks, otherwise OFF. */ | |
100 | ||
101 | #ifdef SYMBOL_RELOADING_DEFAULT | |
102 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
103 | #else | |
104 | int symbol_reloading = 0; | |
105 | #endif | |
106 | ||
bd5635a1 RP |
107 | /* Structure to manage complaints about symbol file contents. */ |
108 | ||
109 | struct complaint complaint_root[1] = { | |
110 | {(char *)0, 0, complaint_root}, | |
111 | }; | |
112 | ||
9d199712 JG |
113 | /* Some actual complaints. */ |
114 | ||
115 | struct complaint oldsyms_complaint = { | |
116 | "Replacing old symbols for `%s'", 0, 0 }; | |
117 | ||
118 | struct complaint empty_symtab_complaint = { | |
119 | "Empty symbol table found for `%s'", 0, 0 }; | |
120 | ||
bd5635a1 RP |
121 | \f |
122 | /* In the following sort, we always make sure that | |
123 | register debug symbol declarations always come before regular | |
124 | debug symbol declarations (as might happen when parameters are | |
125 | then put into registers by the compiler). */ | |
126 | ||
127 | static int | |
128 | compare_symbols (s1, s2) | |
129 | struct symbol **s1, **s2; | |
130 | { | |
131 | register int namediff; | |
132 | ||
133 | /* Compare the initial characters. */ | |
134 | namediff = SYMBOL_NAME (*s1)[0] - SYMBOL_NAME (*s2)[0]; | |
135 | if (namediff != 0) return namediff; | |
136 | ||
137 | /* If they match, compare the rest of the names. */ | |
138 | namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); | |
139 | if (namediff != 0) return namediff; | |
140 | ||
141 | /* For symbols of the same name, registers should come first. */ | |
142 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) | |
143 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); | |
144 | } | |
145 | ||
146 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ | |
147 | ||
148 | void | |
149 | sort_block_syms (b) | |
150 | register struct block *b; | |
151 | { | |
152 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
153 | sizeof (struct symbol *), compare_symbols); | |
154 | } | |
155 | ||
156 | /* Call sort_symtab_syms to sort alphabetically | |
157 | the symbols of each block of one symtab. */ | |
158 | ||
159 | void | |
160 | sort_symtab_syms (s) | |
161 | register struct symtab *s; | |
162 | { | |
c9bd6710 JG |
163 | register struct blockvector *bv; |
164 | int nbl; | |
bd5635a1 RP |
165 | int i; |
166 | register struct block *b; | |
167 | ||
c9bd6710 JG |
168 | if (s == 0) |
169 | return; | |
170 | bv = BLOCKVECTOR (s); | |
171 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
bd5635a1 RP |
172 | for (i = 0; i < nbl; i++) |
173 | { | |
174 | b = BLOCKVECTOR_BLOCK (bv, i); | |
175 | if (BLOCK_SHOULD_SORT (b)) | |
176 | sort_block_syms (b); | |
177 | } | |
178 | } | |
179 | ||
180 | void | |
181 | sort_all_symtab_syms () | |
182 | { | |
183 | register struct symtab *s; | |
184 | ||
185 | for (s = symtab_list; s; s = s->next) | |
186 | { | |
187 | sort_symtab_syms (s); | |
188 | } | |
189 | } | |
190 | ||
191 | /* Make a copy of the string at PTR with SIZE characters in the symbol obstack | |
192 | (and add a null character at the end in the copy). | |
193 | Returns the address of the copy. */ | |
194 | ||
195 | char * | |
196 | obsavestring (ptr, size) | |
197 | char *ptr; | |
198 | int size; | |
199 | { | |
200 | register char *p = (char *) obstack_alloc (symbol_obstack, size + 1); | |
201 | /* Open-coded bcopy--saves function call time. | |
202 | These strings are usually short. */ | |
203 | { | |
204 | register char *p1 = ptr; | |
205 | register char *p2 = p; | |
206 | char *end = ptr + size; | |
207 | while (p1 != end) | |
208 | *p2++ = *p1++; | |
209 | } | |
210 | p[size] = 0; | |
211 | return p; | |
212 | } | |
213 | ||
214 | /* Concatenate strings S1, S2 and S3; return the new string. | |
215 | Space is found in the symbol_obstack. */ | |
216 | ||
217 | char * | |
218 | obconcat (s1, s2, s3) | |
219 | char *s1, *s2, *s3; | |
220 | { | |
221 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
222 | register char *val = (char *) obstack_alloc (symbol_obstack, len); | |
223 | strcpy (val, s1); | |
224 | strcat (val, s2); | |
225 | strcat (val, s3); | |
226 | return val; | |
227 | } | |
228 | \f | |
229 | /* Accumulate the misc functions in bunches of 127. | |
230 | At the end, copy them all into one newly allocated structure. */ | |
231 | ||
232 | #define MISC_BUNCH_SIZE 127 | |
233 | ||
234 | struct misc_bunch | |
235 | { | |
236 | struct misc_bunch *next; | |
237 | struct misc_function contents[MISC_BUNCH_SIZE]; | |
238 | }; | |
239 | ||
240 | /* Bunch currently being filled up. | |
241 | The next field points to chain of filled bunches. */ | |
242 | ||
243 | static struct misc_bunch *misc_bunch; | |
244 | ||
245 | /* Number of slots filled in current bunch. */ | |
246 | ||
247 | static int misc_bunch_index; | |
248 | ||
249 | /* Total number of misc functions recorded so far. */ | |
250 | ||
251 | static int misc_count; | |
252 | ||
253 | void | |
254 | init_misc_bunches () | |
255 | { | |
256 | misc_count = 0; | |
257 | misc_bunch = 0; | |
258 | misc_bunch_index = MISC_BUNCH_SIZE; | |
259 | } | |
260 | ||
261 | void | |
262 | prim_record_misc_function (name, address, misc_type) | |
263 | char *name; | |
264 | CORE_ADDR address; | |
265 | enum misc_function_type misc_type; | |
266 | { | |
267 | register struct misc_bunch *new; | |
268 | ||
269 | if (misc_bunch_index == MISC_BUNCH_SIZE) | |
270 | { | |
271 | new = (struct misc_bunch *) xmalloc (sizeof (struct misc_bunch)); | |
272 | misc_bunch_index = 0; | |
273 | new->next = misc_bunch; | |
274 | misc_bunch = new; | |
275 | } | |
276 | misc_bunch->contents[misc_bunch_index].name = name; | |
277 | misc_bunch->contents[misc_bunch_index].address = address; | |
278 | misc_bunch->contents[misc_bunch_index].type = misc_type; | |
279 | misc_bunch->contents[misc_bunch_index].misc_info = 0; | |
280 | misc_bunch_index++; | |
281 | misc_count++; | |
282 | } | |
283 | ||
284 | static int | |
285 | compare_misc_functions (fn1, fn2) | |
286 | struct misc_function *fn1, *fn2; | |
287 | { | |
288 | /* Return a signed result based on unsigned comparisons | |
289 | so that we sort into unsigned numeric order. */ | |
290 | if (fn1->address < fn2->address) | |
291 | return -1; | |
292 | if (fn1->address > fn2->address) | |
293 | return 1; | |
294 | return 0; | |
295 | } | |
296 | ||
297 | /* ARGSUSED */ | |
298 | void | |
299 | discard_misc_bunches (foo) | |
300 | int foo; | |
301 | { | |
302 | register struct misc_bunch *next; | |
303 | ||
304 | while (misc_bunch) | |
305 | { | |
306 | next = misc_bunch->next; | |
307 | free (misc_bunch); | |
308 | misc_bunch = next; | |
309 | } | |
310 | } | |
311 | ||
7d9884b9 JG |
312 | /* After adding things to the vector, sort or re-sort it into address order. */ |
313 | void | |
314 | sort_misc_function_vector () | |
315 | { | |
316 | qsort (misc_function_vector, misc_function_count, | |
317 | sizeof (struct misc_function), | |
318 | compare_misc_functions); | |
319 | } | |
320 | ||
321 | /* Compact duplicate entries out of the misc function vector by walking | |
322 | through the vector and compacting out entries with duplicate addresses | |
323 | and matching names. | |
324 | ||
325 | When files contain multiple sources of symbol information, it is | |
326 | possible for the misc function vector to contain many duplicate entries. | |
327 | As an example, SVR4 systems use ELF formatted object files, which | |
328 | usually contain at least two different types of symbol tables (a | |
329 | standard ELF one and a smaller dynamic linking table), as well as | |
330 | DWARF debugging information for files compiled with -g. | |
331 | ||
332 | Without compacting, the misc function vector for gdb itself contains | |
333 | over a 1000 duplicates, about a third of the total table size. Aside | |
334 | from the potential trap of not noticing that two successive entries | |
335 | identify the same location, this duplication impacts the time required | |
336 | to linearly scan the table, which is done in a number of places. So | |
337 | just do one linear scan here and toss out the duplicates. | |
338 | ||
339 | Note that the strings themselves are allocated on the symbol_obstack, | |
340 | so we can't easily reclaim their memory. They will get automatically | |
341 | freed when the symbol table is freed. | |
342 | ||
343 | Also note we only go up to the next to last entry within the loop | |
344 | and then copy the last entry explicitly after the loop terminates. | |
345 | ||
346 | Since the different sources of information for each symbol may | |
347 | have different levels of "completeness", we may have duplicates | |
348 | that have one entry with type "mf_unknown" and the other with a | |
349 | known type. So if the one we are leaving alone has type mf_unknown, | |
350 | overwrite it's type with the type from the one we are compacting out. | |
351 | */ | |
352 | ||
353 | ||
354 | static void | |
355 | compact_misc_function_vector () | |
356 | { | |
357 | struct misc_function *copyfrom; | |
358 | struct misc_function *copyto; | |
359 | ||
360 | copyfrom = copyto = misc_function_vector; | |
361 | while (copyfrom < misc_function_vector + misc_function_count - 1) | |
362 | { | |
363 | if (copyfrom -> address == (copyfrom + 1) -> address | |
364 | && (strcmp (copyfrom -> name, (copyfrom + 1) -> name) == 0)) | |
365 | { | |
366 | if ((copyfrom + 1) -> type == mf_unknown) | |
367 | { | |
368 | (copyfrom + 1) -> type = copyfrom -> type; | |
369 | } | |
370 | copyfrom++; | |
371 | } | |
372 | else | |
373 | { | |
374 | *copyto++ = *copyfrom++; | |
375 | } | |
376 | } | |
377 | *copyto++ = *copyfrom++; | |
378 | misc_function_count = copyto - misc_function_vector; | |
379 | misc_function_vector = (struct misc_function *) | |
380 | xrealloc (misc_function_vector, | |
381 | misc_function_count * sizeof (struct misc_function)); | |
382 | ||
383 | } | |
384 | ||
bd5635a1 RP |
385 | /* INCLINK nonzero means bunches are from an incrementally-linked file. |
386 | Add them to the existing bunches. | |
387 | Otherwise INCLINK is zero, and we start from scratch. */ | |
388 | void | |
389 | condense_misc_bunches (inclink) | |
390 | int inclink; | |
391 | { | |
392 | register int i, j; | |
393 | register struct misc_bunch *bunch; | |
394 | ||
395 | if (inclink) | |
396 | { | |
397 | misc_function_vector | |
398 | = (struct misc_function *) | |
399 | xrealloc (misc_function_vector, (misc_count + misc_function_count) | |
400 | * sizeof (struct misc_function)); | |
401 | j = misc_function_count; | |
402 | } | |
403 | else | |
404 | { | |
405 | misc_function_vector | |
406 | = (struct misc_function *) | |
407 | xmalloc (misc_count * sizeof (struct misc_function)); | |
408 | j = 0; | |
409 | } | |
410 | ||
411 | bunch = misc_bunch; | |
412 | while (bunch) | |
413 | { | |
414 | for (i = 0; i < misc_bunch_index; i++, j++) | |
415 | { | |
416 | misc_function_vector[j] = bunch->contents[i]; | |
417 | #ifdef NAMES_HAVE_UNDERSCORE | |
418 | if (misc_function_vector[j].name[0] == '_') | |
419 | misc_function_vector[j].name++; | |
420 | #endif | |
d47d5315 JG |
421 | #ifdef SOME_NAMES_HAVE_DOT |
422 | if (misc_function_vector[j].name[0] == '.') | |
423 | misc_function_vector[j].name++; | |
424 | #endif | |
425 | ||
bd5635a1 RP |
426 | } |
427 | bunch = bunch->next; | |
428 | misc_bunch_index = MISC_BUNCH_SIZE; | |
429 | } | |
430 | ||
431 | if (misc_function_count + misc_count != j) /* DEBUG */ | |
432 | printf_filtered ("Function counts are off! %d + %d != %d\n", | |
433 | misc_function_count, misc_count, j); | |
434 | ||
435 | misc_function_count = j; | |
436 | ||
437 | /* Sort the misc functions by address. */ | |
438 | ||
7d9884b9 JG |
439 | sort_misc_function_vector (); |
440 | ||
441 | /* Compact out any duplicates. */ | |
442 | ||
443 | compact_misc_function_vector (); | |
bd5635a1 RP |
444 | } |
445 | ||
446 | ||
447 | /* Get the symbol table that corresponds to a partial_symtab. | |
448 | This is fast after the first time you do it. In fact, there | |
449 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
450 | case inline. */ | |
451 | ||
452 | struct symtab * | |
453 | psymtab_to_symtab (pst) | |
454 | register struct partial_symtab *pst; | |
455 | { | |
bd5635a1 RP |
456 | /* If it's been looked up before, return it. */ |
457 | if (pst->symtab) | |
458 | return pst->symtab; | |
459 | ||
460 | /* If it has not yet been read in, read it. */ | |
461 | if (!pst->readin) | |
462 | { | |
463 | (*pst->read_symtab) (pst); | |
464 | } | |
465 | ||
61a7292f | 466 | return pst->symtab; |
bd5635a1 RP |
467 | } |
468 | ||
469 | /* Process a symbol file, as either the main file or as a dynamically | |
470 | loaded file. | |
471 | ||
b3fdaf3d JK |
472 | NAME is the file name (which will be tilde-expanded and made |
473 | absolute herein) (but we don't free or modify NAME itself). | |
474 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
475 | is the main symbol file, or whether it's an extra symbol file such | |
476 | as dynamically loaded code. If !mainline, ADDR is the address | |
bd5635a1 RP |
477 | where the text segment was loaded. */ |
478 | ||
479 | void | |
7d9884b9 JG |
480 | syms_from_objfile (objfile, addr, mainline) |
481 | struct objfile *objfile; | |
bd5635a1 RP |
482 | CORE_ADDR addr; |
483 | int mainline; | |
484 | { | |
bd5635a1 RP |
485 | asection *text_sect; |
486 | struct sym_fns *sf; | |
7d9884b9 | 487 | bfd *sym_bfd = objfile->obfd; |
bd5635a1 | 488 | |
bd5635a1 RP |
489 | /* There is a distinction between having no symbol table |
490 | (we refuse to read the file, leaving the old set of symbols around) | |
491 | and having no debugging symbols in your symbol table (we read | |
492 | the file and end up with a mostly empty symbol table). */ | |
493 | ||
494 | if (!(bfd_get_file_flags (sym_bfd) & HAS_SYMS)) | |
d47d5315 JG |
495 | return; |
496 | ||
497 | /* Save startup file's range of PC addresses to help blockframe.c | |
498 | decide where the bottom of the stack is. */ | |
499 | if (bfd_get_file_flags (sym_bfd) & EXEC_P) | |
bd5635a1 | 500 | { |
d47d5315 JG |
501 | /* Executable file -- record its entry point so we'll recognize |
502 | the startup file because it contains the entry point. */ | |
503 | entry_point = bfd_get_start_address (sym_bfd); | |
bd5635a1 | 504 | } |
d47d5315 | 505 | else |
bd5635a1 | 506 | { |
d47d5315 JG |
507 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
508 | /* ~0 will not be in any file, we hope. */ | |
509 | entry_point = ~0; | |
510 | /* set the startup file to be an empty range. */ | |
511 | startup_file_start = 0; | |
512 | startup_file_end = 0; | |
bd5635a1 RP |
513 | } |
514 | ||
7d9884b9 | 515 | sf = symfile_init (objfile); |
bd5635a1 RP |
516 | |
517 | if (mainline) | |
518 | { | |
519 | /* Since no error yet, throw away the old symbol table. */ | |
520 | ||
7d9884b9 JG |
521 | if (symfile_objfile) |
522 | free_objfile (symfile_objfile); | |
523 | symfile_objfile = 0; | |
bd5635a1 RP |
524 | |
525 | (*sf->sym_new_init) (); | |
526 | ||
527 | /* For mainline, caller didn't know the specified address of the | |
528 | text section. We fix that here. */ | |
529 | text_sect = bfd_get_section_by_name (sym_bfd, ".text"); | |
530 | addr = bfd_section_vma (sym_bfd, text_sect); | |
531 | } | |
532 | ||
533 | clear_complaints(); /* Allow complaints to appear for this new file. */ | |
534 | ||
535 | (*sf->sym_read) (sf, addr, mainline); | |
536 | ||
537 | /* Don't allow char * to have a typename (else would get caddr_t.) */ | |
538 | /* Ditto void *. FIXME should do this for all the builtin types. */ | |
539 | ||
540 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
541 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
542 | ||
543 | if (mainline) | |
544 | { | |
545 | /* OK, make it the "real" symbol file. */ | |
7d9884b9 | 546 | symfile_objfile = objfile; |
bd5635a1 RP |
547 | symfile_fns = sf; |
548 | } | |
549 | ||
0ef6f019 JG |
550 | /* If we have wiped out any old symbol tables, clean up. */ |
551 | clear_symtab_users_once (); | |
d47d5315 JG |
552 | } |
553 | ||
554 | ||
555 | /* Process a symbol file, as either the main file or as a dynamically | |
556 | loaded file. | |
557 | ||
558 | NAME is the file name (which will be tilde-expanded and made | |
559 | absolute herein) (but we don't free or modify NAME itself). | |
560 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
561 | is the main symbol file, or whether it's an extra symbol file such | |
562 | as dynamically loaded code. If !mainline, ADDR is the address | |
563 | where the text segment was loaded. */ | |
564 | ||
565 | void | |
566 | symbol_file_add (name, from_tty, addr, mainline) | |
567 | char *name; | |
568 | int from_tty; | |
569 | CORE_ADDR addr; | |
570 | int mainline; | |
571 | { | |
7d9884b9 | 572 | struct objfile *objfile; |
d47d5315 JG |
573 | bfd *sym_bfd; |
574 | ||
7d9884b9 JG |
575 | objfile = symfile_open (name); |
576 | sym_bfd = objfile->obfd; | |
d47d5315 JG |
577 | |
578 | /* There is a distinction between having no symbol table | |
579 | (we refuse to read the file, leaving the old set of symbols around) | |
580 | and having no debugging symbols in your symbol table (we read | |
7d9884b9 JG |
581 | the file and end up with a mostly empty symbol table, but with lots |
582 | of stuff in the misc function vector). */ | |
d47d5315 JG |
583 | |
584 | if (!(bfd_get_file_flags (sym_bfd) & HAS_SYMS)) | |
585 | { | |
586 | error ("%s has no symbol-table", name); | |
587 | } | |
588 | ||
589 | if ((symtab_list || partial_symtab_list) | |
590 | && mainline | |
591 | && from_tty | |
592 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
593 | error ("Not confirmed."); | |
594 | ||
595 | if (from_tty) | |
596 | { | |
597 | printf_filtered ("Reading symbols from %s...", name); | |
598 | wrap_here (""); | |
599 | fflush (stdout); | |
600 | } | |
601 | ||
7d9884b9 | 602 | syms_from_objfile (objfile, addr, mainline); |
0ef6f019 | 603 | |
bd5635a1 RP |
604 | if (from_tty) |
605 | { | |
0ef6f019 | 606 | printf_filtered ("done.\n"); |
bd5635a1 RP |
607 | fflush (stdout); |
608 | } | |
609 | } | |
610 | ||
611 | /* This is the symbol-file command. Read the file, analyze its symbols, | |
612 | and add a struct symtab to symtab_list. */ | |
613 | ||
614 | void | |
615 | symbol_file_command (name, from_tty) | |
616 | char *name; | |
617 | int from_tty; | |
618 | { | |
619 | ||
620 | dont_repeat (); | |
621 | ||
622 | if (name == 0) | |
623 | { | |
7d9884b9 JG |
624 | if (symfile_objfile) { |
625 | if ((symtab_list || partial_symtab_list) | |
626 | && from_tty | |
627 | && !query ("Discard symbol table from `%s'? ", | |
628 | symfile_objfile->name)) | |
629 | error ("Not confirmed."); | |
630 | free_objfile (symfile_objfile); | |
631 | } | |
632 | symfile_objfile = 0; | |
bd5635a1 RP |
633 | /* FIXME, this does not account for the main file and subsequent |
634 | files (shared libs, dynloads, etc) having different formats. | |
635 | It only calls the cleanup routine for the main file's format. */ | |
0ef6f019 JG |
636 | if (symfile_fns) { |
637 | (*symfile_fns->sym_new_init) (); | |
638 | free (symfile_fns); | |
639 | symfile_fns = 0; | |
640 | } | |
bd5635a1 RP |
641 | return; |
642 | } | |
643 | ||
2403f49b JK |
644 | /* Getting new symbols may change our opinion about what is |
645 | frameless. */ | |
646 | reinit_frame_cache (); | |
647 | ||
bd5635a1 RP |
648 | symbol_file_add (name, from_tty, (CORE_ADDR)0, 1); |
649 | } | |
650 | ||
651 | /* Open NAME and hand it off to BFD for preliminary analysis. Result | |
7d9884b9 JG |
652 | is newly malloc'd struct objfile *, which includes a newly malloc'd` |
653 | copy of NAME (tilde-expanded and made absolute). | |
654 | In case of trouble, error() is called. */ | |
bd5635a1 | 655 | |
7d9884b9 | 656 | static struct objfile * |
bd5635a1 RP |
657 | symfile_open (name) |
658 | char *name; | |
659 | { | |
660 | bfd *sym_bfd; | |
661 | int desc; | |
662 | char *absolute_name; | |
7d9884b9 | 663 | struct objfile *objfile; |
bd5635a1 | 664 | |
7d9884b9 | 665 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
bd5635a1 | 666 | |
7d9884b9 | 667 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
bd5635a1 | 668 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name); |
7d9884b9 JG |
669 | if (desc < 0) { |
670 | make_cleanup (free, name); | |
bd5635a1 | 671 | perror_with_name (name); |
7d9884b9 JG |
672 | } |
673 | free (name); /* Free 1st new malloc'd copy */ | |
674 | name = absolute_name; /* Keep 2nd malloc'd copy in objfile and bfd */ | |
bd5635a1 RP |
675 | |
676 | sym_bfd = bfd_fdopenr (name, NULL, desc); | |
677 | if (!sym_bfd) | |
678 | { | |
679 | close (desc); | |
7d9884b9 | 680 | make_cleanup (free, name); |
bd5635a1 RP |
681 | error ("Could not open `%s' to read symbols: %s", |
682 | name, bfd_errmsg (bfd_error)); | |
683 | } | |
bd5635a1 | 684 | |
7d9884b9 JG |
685 | if (!bfd_check_format (sym_bfd, bfd_object)) { |
686 | bfd_close (sym_bfd); /* This also closes desc */ | |
687 | make_cleanup (free, name); | |
bd5635a1 RP |
688 | error ("\"%s\": can't read symbols: %s.", |
689 | name, bfd_errmsg (bfd_error)); | |
7d9884b9 JG |
690 | } |
691 | ||
692 | objfile = allocate_objfile (sym_bfd, name); | |
693 | return objfile; | |
694 | } | |
695 | ||
696 | ||
697 | /* Allocate a new objfile struct, fill it in as best we can, and return it. | |
698 | FIXME-soon! Eventually, the objfile will contain the obstack in which | |
699 | the symtabs and psymtabs are contained, so they can all be blown away | |
700 | cheaply and easily. */ | |
701 | ||
702 | struct objfile * | |
703 | allocate_objfile (abfd, filename) | |
704 | bfd *abfd; | |
705 | char *filename; | |
706 | { | |
707 | struct objfile *objfile; | |
708 | ||
709 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
710 | bzero (objfile, sizeof (*objfile)); | |
711 | ||
712 | objfile->obfd = abfd; | |
713 | objfile->name = filename; | |
bd5635a1 | 714 | |
7d9884b9 JG |
715 | objfile->symtabs = 0; /* Don't have any yet */ |
716 | objfile->psymtabs = 0; /* Don't have any yet */ | |
717 | ||
718 | objfile->mtime = bfd_get_mtime (abfd); | |
719 | ||
720 | /* Chain it to the list. */ | |
721 | objfile->next = object_files; | |
722 | object_files = objfile; | |
723 | ||
724 | return objfile; | |
725 | } | |
726 | ||
727 | ||
728 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ | |
729 | ||
730 | void | |
731 | free_objfile (objfile) | |
732 | struct objfile *objfile; | |
733 | { | |
734 | struct objfile *ofp; | |
735 | ||
736 | if (objfile->name) | |
737 | free (objfile->name); | |
738 | if (objfile->obfd) | |
739 | bfd_close (objfile->obfd); | |
740 | ||
741 | /* Remove it from the chain of all objfiles. */ | |
742 | if (object_files == objfile) | |
743 | object_files = objfile->next; | |
744 | else for (ofp = object_files; ofp; ofp = ofp->next) { | |
745 | if (ofp->next == objfile) | |
746 | ofp->next = objfile->next; | |
747 | } | |
748 | ||
749 | /* FIXME! This should only free those associated with the objfile | |
750 | being passed to us. THIS IS A KLUDGE TO BOOTSTRAP US. */ | |
751 | free_all_psymtabs (); | |
752 | free_all_symtabs (); | |
753 | ||
754 | free (objfile); | |
bd5635a1 RP |
755 | } |
756 | ||
7d9884b9 | 757 | |
bd5635a1 RP |
758 | /* Link a new symtab_fns into the global symtab_fns list. |
759 | Called by various _initialize routines. */ | |
760 | ||
761 | void | |
762 | add_symtab_fns (sf) | |
763 | struct sym_fns *sf; | |
764 | { | |
765 | sf->next = symtab_fns; | |
766 | symtab_fns = sf; | |
767 | } | |
768 | ||
769 | ||
770 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
771 | returns or calls error(). The result is a malloc'd struct sym_fns | |
772 | that contains cached information about the symbol file. */ | |
773 | ||
774 | static struct sym_fns * | |
7d9884b9 JG |
775 | symfile_init (objfile) |
776 | struct objfile *objfile; | |
bd5635a1 RP |
777 | { |
778 | struct sym_fns *sf, *sf2; | |
7d9884b9 | 779 | bfd *sym_bfd = objfile->obfd; |
bd5635a1 RP |
780 | |
781 | for (sf = symtab_fns; sf != NULL; sf = sf->next) | |
782 | { | |
783 | if (!strncmp (bfd_get_target (sym_bfd), sf->sym_name, sf->sym_namelen)) | |
784 | { | |
785 | sf2 = (struct sym_fns *)xmalloc (sizeof (*sf2)); | |
786 | /* FIXME, who frees this? */ | |
787 | *sf2 = *sf; | |
7d9884b9 | 788 | sf2->objfile = objfile; |
bd5635a1 RP |
789 | sf2->sym_bfd = sym_bfd; |
790 | sf2->sym_private = 0; /* Not alloc'd yet */ | |
791 | (*sf2->sym_init) (sf2); | |
792 | return sf2; | |
793 | } | |
794 | } | |
c9bd6710 JG |
795 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
796 | bfd_get_target (sym_bfd)); | |
e1ce8aa5 | 797 | return 0; /* Appease lint. */ |
bd5635a1 RP |
798 | } |
799 | \f | |
800 | /* This function runs the load command of our current target. */ | |
801 | ||
802 | void | |
803 | load_command (arg, from_tty) | |
804 | char *arg; | |
805 | int from_tty; | |
806 | { | |
807 | target_load (arg, from_tty); | |
808 | } | |
809 | ||
61a7292f SG |
810 | /* This function allows the addition of incrementally linked object files. |
811 | It does not modify any state in the target, only in the debugger. */ | |
bd5635a1 | 812 | |
e1ce8aa5 | 813 | /* ARGSUSED */ |
bd5635a1 | 814 | void |
61a7292f SG |
815 | add_symbol_file_command (arg_string, from_tty) |
816 | char *arg_string; | |
bd5635a1 RP |
817 | int from_tty; |
818 | { | |
819 | char *name; | |
820 | CORE_ADDR text_addr; | |
821 | ||
61a7292f SG |
822 | /* Getting new symbols may change our opinion about what is |
823 | frameless. */ | |
824 | reinit_frame_cache (); | |
825 | ||
bd5635a1 | 826 | if (arg_string == 0) |
e74d7b43 | 827 | error ("add-symbol-file takes a file name and an address"); |
bd5635a1 RP |
828 | |
829 | arg_string = tilde_expand (arg_string); | |
830 | make_cleanup (free, arg_string); | |
831 | ||
832 | for( ; *arg_string == ' '; arg_string++ ); | |
833 | name = arg_string; | |
834 | for( ; *arg_string && *arg_string != ' ' ; arg_string++ ); | |
835 | *arg_string++ = (char) 0; | |
836 | ||
837 | if (name[0] == 0) | |
e74d7b43 | 838 | error ("add-symbol-file takes a file name and an address"); |
bd5635a1 RP |
839 | |
840 | text_addr = parse_and_eval_address (arg_string); | |
841 | ||
842 | dont_repeat (); | |
843 | ||
d8ce1326 JG |
844 | if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", |
845 | name, local_hex_string (text_addr))) | |
bd5635a1 RP |
846 | error ("Not confirmed."); |
847 | ||
848 | symbol_file_add (name, 0, text_addr, 0); | |
849 | } | |
850 | \f | |
7d9884b9 | 851 | /* Re-read symbols if a symbol-file has changed. */ |
bd5635a1 RP |
852 | void |
853 | reread_symbols () | |
854 | { | |
7d9884b9 JG |
855 | struct objfile *objfile; |
856 | long new_modtime; | |
857 | int reread_one = 0; | |
bd5635a1 RP |
858 | |
859 | /* With the addition of shared libraries, this should be modified, | |
860 | the load time should be saved in the partial symbol tables, since | |
861 | different tables may come from different source files. FIXME. | |
862 | This routine should then walk down each partial symbol table | |
863 | and see if the symbol table that it originates from has been changed | |
864 | */ | |
865 | ||
7d9884b9 JG |
866 | for (objfile = object_files; objfile; objfile = objfile->next) { |
867 | if (objfile->obfd) { | |
868 | objfile->obfd->mtime_set = false; /* Force it to reread. */ | |
869 | new_modtime = bfd_get_mtime (objfile->obfd); | |
870 | if (new_modtime != objfile->mtime) { | |
871 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
872 | objfile->name); | |
873 | /* FIXME, this should use a different command...that would only | |
874 | affect this objfile's symbols. */ | |
875 | symbol_file_command (objfile->name, 0); | |
876 | objfile->mtime = new_modtime; | |
877 | reread_one = 1; | |
878 | } | |
bd5635a1 | 879 | } |
7d9884b9 JG |
880 | } |
881 | ||
882 | if (reread_one) | |
883 | breakpoint_re_set (); | |
bd5635a1 RP |
884 | } |
885 | ||
bd5635a1 RP |
886 | /* This function is really horrible, but to avoid it, there would need |
887 | to be more filling in of forward references. */ | |
7cc43879 | 888 | void |
bd5635a1 RP |
889 | fill_in_vptr_fieldno (type) |
890 | struct type *type; | |
891 | { | |
bd5635a1 | 892 | if (TYPE_VPTR_FIELDNO (type) < 0) |
7cc43879 JK |
893 | { |
894 | int i; | |
895 | for (i = 1; i < TYPE_N_BASECLASSES (type); i++) | |
896 | { | |
897 | fill_in_vptr_fieldno (TYPE_BASECLASS (type, i)); | |
898 | if (TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, i)) >= 0) | |
899 | { | |
900 | TYPE_VPTR_FIELDNO (type) | |
901 | = TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, i)); | |
902 | TYPE_VPTR_BASETYPE (type) | |
903 | = TYPE_VPTR_BASETYPE (TYPE_BASECLASS (type, i)); | |
904 | break; | |
905 | } | |
906 | } | |
907 | } | |
bd5635a1 RP |
908 | } |
909 | \f | |
910 | /* Functions to handle complaints during symbol reading. */ | |
911 | ||
912 | /* How many complaints about a particular thing should be printed before | |
61a7292f SG |
913 | we stop whining about it? Default is no whining at all, since so many |
914 | systems have ill-constructed symbol files. */ | |
bd5635a1 | 915 | |
61a7292f | 916 | static unsigned stop_whining = 0; |
bd5635a1 RP |
917 | |
918 | /* Print a complaint about the input symbols, and link the complaint block | |
7d9884b9 | 919 | into a chain for later handling. */ |
bd5635a1 | 920 | |
7d9884b9 | 921 | void |
bd5635a1 RP |
922 | complain (complaint, val) |
923 | struct complaint *complaint; | |
924 | char *val; | |
925 | { | |
926 | complaint->counter++; | |
927 | if (complaint->next == 0) { | |
928 | complaint->next = complaint_root->next; | |
929 | complaint_root->next = complaint; | |
930 | } | |
931 | if (complaint->counter > stop_whining) | |
7d9884b9 | 932 | return; |
bd5635a1 RP |
933 | wrap_here (""); |
934 | if (!info_verbose) { | |
935 | puts_filtered ("During symbol reading..."); | |
936 | } | |
937 | printf_filtered (complaint->message, val); | |
938 | puts_filtered ("..."); | |
939 | wrap_here(""); | |
940 | if (!info_verbose) | |
941 | puts_filtered ("\n"); | |
bd5635a1 RP |
942 | } |
943 | ||
944 | /* Clear out all complaint counters that have ever been incremented. */ | |
945 | ||
946 | void | |
947 | clear_complaints () | |
948 | { | |
949 | struct complaint *p; | |
950 | ||
951 | for (p = complaint_root->next; p != complaint_root; p = p->next) | |
952 | p->counter = 0; | |
953 | } | |
954 | \f | |
7d9884b9 JG |
955 | enum language |
956 | deduce_language_from_filename (filename) | |
957 | char *filename; | |
958 | { | |
959 | char *c = rindex (filename, '.'); | |
960 | ||
961 | if (!c) ; /* Get default. */ | |
962 | else if(!strcmp(c,".mod")) | |
963 | return language_m2; | |
964 | else if(!strcmp(c,".c")) | |
965 | return language_c; | |
966 | else if(!strcmp(c,".cc") || !strcmp(c,".C")) | |
967 | return language_cplus; | |
968 | ||
969 | return language_unknown; /* default */ | |
970 | } | |
971 | \f | |
d8ce1326 JG |
972 | /* allocate_symtab: |
973 | ||
974 | Allocate and partly initialize a new symbol table. Return a pointer | |
975 | to it. error() if no space. | |
976 | ||
977 | Caller must set these fields: | |
978 | LINETABLE(symtab) | |
979 | symtab->blockvector | |
d8ce1326 JG |
980 | symtab->dirname |
981 | symtab->free_code | |
982 | symtab->free_ptr | |
983 | initialize any EXTRA_SYMTAB_INFO | |
984 | possibly free_named_symtabs (symtab->filename); | |
985 | symtab->next = symtab_list; | |
986 | symtab_list = symtab; | |
987 | */ | |
988 | ||
989 | struct symtab * | |
7d9884b9 | 990 | allocate_symtab(name, objfile) |
d8ce1326 | 991 | char *name; |
7d9884b9 | 992 | struct objfile *objfile; |
d8ce1326 JG |
993 | { |
994 | register struct symtab *symtab; | |
d8ce1326 JG |
995 | |
996 | symtab = (struct symtab *) xmalloc (sizeof (struct symtab)); | |
997 | bzero (symtab, sizeof (*symtab)); | |
998 | symtab->filename = name; | |
999 | symtab->fullname = NULL; | |
1000 | symtab->nlines = 0; | |
1001 | symtab->line_charpos = 0; | |
1002 | symtab->version = 0; | |
7d9884b9 | 1003 | symtab->language = deduce_language_from_filename (name); |
d8ce1326 | 1004 | |
7d9884b9 JG |
1005 | /* Hook it to the objfile it comes from */ |
1006 | symtab->objfile = objfile; | |
1007 | symtab->objfile_chain = objfile->symtabs; | |
1008 | objfile->symtabs = symtab; | |
1009 | ||
1010 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
1011 | INIT_EXTRA_SYMTAB_INFO(symtab); | |
1012 | #endif | |
d8ce1326 JG |
1013 | |
1014 | return symtab; | |
1015 | } | |
1016 | \f | |
9d199712 JG |
1017 | /* clear_symtab_users_once: |
1018 | ||
1019 | This function is run after symbol reading, or from a cleanup. | |
1020 | If an old symbol table was obsoleted, the old symbol table | |
1021 | has been blown away, but the other GDB data structures that may | |
1022 | reference it have not yet been cleared or re-directed. (The old | |
1023 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
1024 | below.) | |
1025 | ||
1026 | This function can be queued N times as a cleanup, or called | |
1027 | directly; it will do all the work the first time, and then will be a | |
1028 | no-op until the next time it is queued. This works by bumping a | |
1029 | counter at queueing time. Much later when the cleanup is run, or at | |
1030 | the end of symbol processing (in case the cleanup is discarded), if | |
1031 | the queued count is greater than the "done-count", we do the work | |
1032 | and set the done-count to the queued count. If the queued count is | |
1033 | less than or equal to the done-count, we just ignore the call. This | |
1034 | is needed because reading a single .o file will often replace many | |
1035 | symtabs (one per .h file, for example), and we don't want to reset | |
1036 | the breakpoints N times in the user's face. | |
1037 | ||
1038 | The reason we both queue a cleanup, and call it directly after symbol | |
1039 | reading, is because the cleanup protects us in case of errors, but is | |
1040 | discarded if symbol reading is successful. */ | |
1041 | ||
1042 | static int clear_symtab_users_queued; | |
1043 | static int clear_symtab_users_done; | |
1044 | ||
1045 | static void | |
1046 | clear_symtab_users_once () | |
1047 | { | |
1048 | /* Enforce once-per-`do_cleanups'-semantics */ | |
1049 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
1050 | return; | |
1051 | clear_symtab_users_done = clear_symtab_users_queued; | |
1052 | ||
1053 | printf ("Resetting debugger state after updating old symbol tables\n"); | |
1054 | ||
1055 | /* Someday, we should do better than this, by only blowing away | |
1056 | the things that really need to be blown. */ | |
1057 | clear_value_history (); | |
1058 | clear_displays (); | |
1059 | clear_internalvars (); | |
1060 | breakpoint_re_set (); | |
1061 | set_default_breakpoint (0, 0, 0, 0); | |
1062 | current_source_symtab = 0; | |
1063 | } | |
1064 | ||
1065 | /* Delete the specified psymtab, and any others that reference it. */ | |
1066 | ||
e1ce8aa5 | 1067 | static void |
9d199712 JG |
1068 | cashier_psymtab (pst) |
1069 | struct partial_symtab *pst; | |
1070 | { | |
1071 | struct partial_symtab *ps, *pprev; | |
1072 | int i; | |
1073 | ||
1074 | /* Find its previous psymtab in the chain */ | |
1075 | for (ps = partial_symtab_list; ps; ps = ps->next) { | |
1076 | if (ps == pst) | |
1077 | break; | |
1078 | pprev = ps; | |
1079 | } | |
1080 | ||
1081 | if (ps) { | |
1082 | /* Unhook it from the chain. */ | |
1083 | if (ps == partial_symtab_list) | |
1084 | partial_symtab_list = ps->next; | |
1085 | else | |
1086 | pprev->next = ps->next; | |
1087 | ||
1088 | /* FIXME, we can't conveniently deallocate the entries in the | |
1089 | partial_symbol lists (global_psymbols/static_psymbols) that | |
1090 | this psymtab points to. These just take up space until all | |
1091 | the psymtabs are reclaimed. Ditto the dependencies list and | |
1092 | filename, which are all in the psymbol_obstack. */ | |
1093 | ||
1094 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
1095 | again: | |
1096 | for (ps = partial_symtab_list; ps; ps = ps->next) { | |
1097 | for (i = 0; i < ps->number_of_dependencies; i++) { | |
1098 | if (ps->dependencies[i] == pst) { | |
1099 | cashier_psymtab (ps); | |
1100 | goto again; /* Must restart, chain has been munged. */ | |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | /* If a symtab or psymtab for filename NAME is found, free it along | |
1108 | with any dependent breakpoints, displays, etc. | |
1109 | Used when loading new versions of object modules with the "add-file" | |
1110 | command. This is only called on the top-level symtab or psymtab's name; | |
1111 | it is not called for subsidiary files such as .h files. | |
1112 | ||
1113 | Return value is 1 if we blew away the environment, 0 if not. | |
1114 | ||
1115 | FIXME. I think this is not the best way to do this. We should | |
1116 | work on being gentler to the environment while still cleaning up | |
1117 | all stray pointers into the freed symtab. */ | |
1118 | ||
1119 | int | |
1120 | free_named_symtabs (name) | |
1121 | char *name; | |
1122 | { | |
1123 | register struct symtab *s; | |
1124 | register struct symtab *prev; | |
1125 | register struct partial_symtab *ps; | |
9d199712 JG |
1126 | struct blockvector *bv; |
1127 | int blewit = 0; | |
1128 | ||
61a7292f SG |
1129 | /* We only wack things if the symbol-reload switch is set. */ |
1130 | if (!symbol_reloading) | |
1131 | return 0; | |
1132 | ||
d11c44f1 JG |
1133 | /* Some symbol formats have trouble providing file names... */ |
1134 | if (name == 0 || *name == '\0') | |
1135 | return 0; | |
1136 | ||
9d199712 JG |
1137 | /* Look for a psymtab with the specified name. */ |
1138 | ||
1139 | again2: | |
1140 | for (ps = partial_symtab_list; ps; ps = ps->next) { | |
1141 | if (!strcmp (name, ps->filename)) { | |
1142 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
1143 | goto again2; /* Must restart, chain has been munged */ | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | /* Look for a symtab with the specified name. */ | |
1148 | ||
1149 | for (s = symtab_list; s; s = s->next) | |
1150 | { | |
1151 | if (!strcmp (name, s->filename)) | |
1152 | break; | |
1153 | prev = s; | |
1154 | } | |
1155 | ||
1156 | if (s) | |
1157 | { | |
1158 | if (s == symtab_list) | |
1159 | symtab_list = s->next; | |
1160 | else | |
1161 | prev->next = s->next; | |
1162 | ||
1163 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
1164 | or not they depend on the symtab being freed. This should be | |
1165 | changed so that only those data structures affected are deleted. */ | |
1166 | ||
1167 | /* But don't delete anything if the symtab is empty. | |
1168 | This test is necessary due to a bug in "dbxread.c" that | |
1169 | causes empty symtabs to be created for N_SO symbols that | |
1170 | contain the pathname of the object file. (This problem | |
1171 | has been fixed in GDB 3.9x). */ | |
1172 | ||
c9bd6710 JG |
1173 | bv = BLOCKVECTOR (s); |
1174 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
9d199712 JG |
1175 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
1176 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
1177 | { | |
1178 | complain (&oldsyms_complaint, name); | |
1179 | ||
1180 | clear_symtab_users_queued++; | |
1181 | make_cleanup (clear_symtab_users_once, 0); | |
1182 | blewit = 1; | |
1183 | } else { | |
1184 | complain (&empty_symtab_complaint, name); | |
1185 | } | |
1186 | ||
1187 | free_symtab (s); | |
1188 | } | |
1189 | else | |
d8ce1326 JG |
1190 | { |
1191 | /* It is still possible that some breakpoints will be affected | |
1192 | even though no symtab was found, since the file might have | |
1193 | been compiled without debugging, and hence not be associated | |
1194 | with a symtab. In order to handle this correctly, we would need | |
1195 | to keep a list of text address ranges for undebuggable files. | |
1196 | For now, we do nothing, since this is a fairly obscure case. */ | |
1197 | ; | |
1198 | } | |
9d199712 JG |
1199 | |
1200 | /* FIXME, what about the misc function vector? */ | |
1201 | return blewit; | |
1202 | } | |
1203 | \f | |
7d9884b9 JG |
1204 | /* |
1205 | * Free all partial_symtab storage. | |
1206 | */ | |
1207 | static void | |
1208 | free_all_psymtabs() | |
1209 | { | |
1210 | obstack_free (psymbol_obstack, 0); | |
1211 | obstack_init (psymbol_obstack); | |
1212 | partial_symtab_list = (struct partial_symtab *) 0; | |
1213 | } | |
1214 | ||
1215 | /* Free all the symtabs that are currently installed, | |
1216 | and all storage associated with them. | |
1217 | Leaves us in a consistent state with no symtabs installed. */ | |
1218 | ||
1219 | static void | |
1220 | free_all_symtabs () | |
1221 | { | |
1222 | register struct symtab *s, *snext; | |
1223 | ||
1224 | /* All values will be invalid because their types will be! */ | |
1225 | ||
1226 | clear_value_history (); | |
1227 | clear_displays (); | |
1228 | clear_internalvars (); | |
1229 | #if defined (CLEAR_SOLIB) | |
1230 | CLEAR_SOLIB (); | |
1231 | #endif | |
1232 | set_default_breakpoint (0, 0, 0, 0); | |
1233 | ||
1234 | current_source_symtab = 0; | |
1235 | ||
1236 | for (s = symtab_list; s; s = snext) | |
1237 | { | |
1238 | snext = s->next; | |
1239 | free_symtab (s); | |
1240 | } | |
1241 | symtab_list = 0; | |
1242 | obstack_free (symbol_obstack, 0); | |
1243 | obstack_init (symbol_obstack); | |
1244 | ||
1245 | if (misc_function_vector) | |
1246 | free (misc_function_vector); | |
1247 | misc_function_count = 0; | |
1248 | misc_function_vector = 0; | |
1249 | clear_pc_function_cache(); | |
1250 | } | |
1251 | \f | |
bd5635a1 RP |
1252 | void |
1253 | _initialize_symfile () | |
1254 | { | |
1255 | ||
1256 | add_com ("symbol-file", class_files, symbol_file_command, | |
1257 | "Load symbol table from executable file FILE.\n\ | |
1258 | The `file' command can also load symbol tables, as well as setting the file\n\ | |
1259 | to execute."); | |
1260 | ||
e74d7b43 | 1261 | add_com ("add-symbol-file", class_files, add_symbol_file_command, |
bd5635a1 RP |
1262 | "Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
1263 | The second argument provides the starting address of the file's text."); | |
1264 | ||
1265 | add_com ("load", class_files, load_command, | |
1266 | "Dynamically load FILE into the running program, and record its symbols\n\ | |
1267 | for access from GDB."); | |
1268 | ||
1269 | add_show_from_set | |
1270 | (add_set_cmd ("complaints", class_support, var_uinteger, | |
1271 | (char *)&stop_whining, | |
1272 | "Set max number of complaints about incorrect symbols.", | |
1273 | &setlist), | |
1274 | &showlist); | |
1275 | ||
61a7292f SG |
1276 | add_show_from_set |
1277 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
1278 | (char *)&symbol_reloading, | |
1279 | "Set dynamic symbol table reloading multiple times in one run.", | |
1280 | &setlist), | |
1281 | &showlist); | |
1282 | ||
bd5635a1 RP |
1283 | obstack_init (symbol_obstack); |
1284 | obstack_init (psymbol_obstack); | |
1285 | } |