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1 | /* corefile.c | |
2 | ||
3 | Copyright (C) 1999-2020 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Binutils. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA | |
20 | 02110-1301, USA. */ | |
21 | \f | |
22 | #include "gprof.h" | |
23 | #include "libiberty.h" | |
24 | #include "filenames.h" | |
25 | #include "search_list.h" | |
26 | #include "source.h" | |
27 | #include "symtab.h" | |
28 | #include "hist.h" | |
29 | #include "corefile.h" | |
30 | #include "safe-ctype.h" | |
31 | #include <limits.h> /* For UINT_MAX. */ | |
32 | ||
33 | bfd *core_bfd; | |
34 | static int core_num_syms; | |
35 | static asymbol **core_syms; | |
36 | asection *core_text_sect; | |
37 | void * core_text_space; | |
38 | ||
39 | static int min_insn_size; | |
40 | int offset_to_code; | |
41 | ||
42 | /* For mapping symbols to specific .o files during file ordering. */ | |
43 | struct function_map * symbol_map; | |
44 | unsigned int symbol_map_count; | |
45 | ||
46 | static void read_function_mappings (const char *); | |
47 | static int core_sym_class (asymbol *); | |
48 | static bfd_boolean get_src_info | |
49 | (bfd_vma, const char **, const char **, int *); | |
50 | ||
51 | extern void i386_find_call (Sym *, bfd_vma, bfd_vma); | |
52 | extern void alpha_find_call (Sym *, bfd_vma, bfd_vma); | |
53 | extern void vax_find_call (Sym *, bfd_vma, bfd_vma); | |
54 | extern void sparc_find_call (Sym *, bfd_vma, bfd_vma); | |
55 | extern void mips_find_call (Sym *, bfd_vma, bfd_vma); | |
56 | extern void aarch64_find_call (Sym *, bfd_vma, bfd_vma); | |
57 | ||
58 | static void | |
59 | parse_error (const char *filename) | |
60 | { | |
61 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), whoami, filename); | |
62 | done (1); | |
63 | } | |
64 | ||
65 | /* Compare two function_map structs based on function name. | |
66 | We want to sort in ascending order. */ | |
67 | ||
68 | static int | |
69 | cmp_symbol_map (const void * l, const void * r) | |
70 | { | |
71 | return strcmp (((struct function_map *) l)->function_name, | |
72 | ((struct function_map *) r)->function_name); | |
73 | } | |
74 | ||
75 | #define BUFSIZE (1024) | |
76 | /* This is BUFSIZE - 1 as a string. Suitable for use in fprintf/sscanf format strings. */ | |
77 | #define STR_BUFSIZE "1023" | |
78 | ||
79 | static void | |
80 | read_function_mappings (const char *filename) | |
81 | { | |
82 | FILE * file = fopen (filename, "r"); | |
83 | char dummy[BUFSIZE]; | |
84 | int count = 0; | |
85 | unsigned int i; | |
86 | ||
87 | if (!file) | |
88 | { | |
89 | fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename); | |
90 | done (1); | |
91 | } | |
92 | ||
93 | /* First parse the mapping file so we know how big we need to | |
94 | make our tables. We also do some sanity checks at this | |
95 | time. */ | |
96 | while (!feof (file)) | |
97 | { | |
98 | int matches; | |
99 | ||
100 | matches = fscanf (file, "%" STR_BUFSIZE "[^\n:]", dummy); | |
101 | if (!matches) | |
102 | parse_error (filename); | |
103 | ||
104 | /* Just skip messages about files with no symbols. */ | |
105 | if (!strncmp (dummy, "No symbols in ", 14)) | |
106 | { | |
107 | matches = fscanf (file, "\n"); | |
108 | if (matches == EOF) | |
109 | parse_error (filename); | |
110 | continue; | |
111 | } | |
112 | ||
113 | /* Don't care what else is on this line at this point. */ | |
114 | matches = fscanf (file, "%" STR_BUFSIZE "[^\n]\n", dummy); | |
115 | if (!matches) | |
116 | parse_error (filename); | |
117 | count++; | |
118 | } | |
119 | ||
120 | /* Now we know how big we need to make our table. */ | |
121 | symbol_map = ((struct function_map *) | |
122 | xmalloc (count * sizeof (struct function_map))); | |
123 | ||
124 | /* Rewind the input file so we can read it again. */ | |
125 | rewind (file); | |
126 | ||
127 | /* Read each entry and put it into the table. */ | |
128 | count = 0; | |
129 | while (!feof (file)) | |
130 | { | |
131 | int matches; | |
132 | char *tmp; | |
133 | ||
134 | matches = fscanf (file, "%" STR_BUFSIZE "[^\n:]", dummy); | |
135 | if (!matches) | |
136 | parse_error (filename); | |
137 | ||
138 | /* Just skip messages about files with no symbols. */ | |
139 | if (!strncmp (dummy, "No symbols in ", 14)) | |
140 | { | |
141 | matches = fscanf (file, "\n"); | |
142 | if (matches == EOF) | |
143 | parse_error (filename); | |
144 | continue; | |
145 | } | |
146 | ||
147 | /* dummy has the filename, go ahead and copy it. */ | |
148 | symbol_map[count].file_name = (char *) xmalloc (strlen (dummy) + 1); | |
149 | strcpy (symbol_map[count].file_name, dummy); | |
150 | ||
151 | /* Now we need the function name. */ | |
152 | matches = fscanf (file, "%" STR_BUFSIZE "[^\n]\n", dummy); | |
153 | if (!matches) | |
154 | parse_error (filename); | |
155 | tmp = strrchr (dummy, ' ') + 1; | |
156 | symbol_map[count].function_name = (char *) xmalloc (strlen (tmp) + 1); | |
157 | strcpy (symbol_map[count].function_name, tmp); | |
158 | count++; | |
159 | } | |
160 | ||
161 | /* Record the size of the map table for future reference. */ | |
162 | symbol_map_count = count; | |
163 | ||
164 | for (i = 0; i < symbol_map_count; ++i) | |
165 | if (i == 0 | |
166 | || filename_cmp (symbol_map[i].file_name, symbol_map[i - 1].file_name)) | |
167 | symbol_map[i].is_first = 1; | |
168 | ||
169 | qsort (symbol_map, symbol_map_count, sizeof (struct function_map), cmp_symbol_map); | |
170 | ||
171 | fclose (file); | |
172 | } | |
173 | ||
174 | void | |
175 | core_init (const char * aout_name) | |
176 | { | |
177 | int core_sym_bytes; | |
178 | asymbol *synthsyms; | |
179 | long synth_count; | |
180 | ||
181 | core_bfd = bfd_openr (aout_name, 0); | |
182 | ||
183 | if (!core_bfd) | |
184 | { | |
185 | perror (aout_name); | |
186 | done (1); | |
187 | } | |
188 | ||
189 | core_bfd->flags |= BFD_DECOMPRESS; | |
190 | ||
191 | if (!bfd_check_format (core_bfd, bfd_object)) | |
192 | { | |
193 | fprintf (stderr, _("%s: %s: not in executable format\n"), whoami, aout_name); | |
194 | done (1); | |
195 | } | |
196 | ||
197 | /* Get core's text section. */ | |
198 | core_text_sect = bfd_get_section_by_name (core_bfd, ".text"); | |
199 | if (!core_text_sect) | |
200 | { | |
201 | core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$"); | |
202 | if (!core_text_sect) | |
203 | { | |
204 | fprintf (stderr, _("%s: can't find .text section in %s\n"), | |
205 | whoami, aout_name); | |
206 | done (1); | |
207 | } | |
208 | } | |
209 | ||
210 | /* Read core's symbol table. */ | |
211 | ||
212 | /* This will probably give us more than we need, but that's ok. */ | |
213 | core_sym_bytes = bfd_get_symtab_upper_bound (core_bfd); | |
214 | if (core_sym_bytes < 0) | |
215 | { | |
216 | fprintf (stderr, "%s: %s: %s\n", whoami, aout_name, | |
217 | bfd_errmsg (bfd_get_error ())); | |
218 | done (1); | |
219 | } | |
220 | ||
221 | core_syms = (asymbol **) xmalloc (core_sym_bytes); | |
222 | core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms); | |
223 | ||
224 | if (core_num_syms < 0) | |
225 | { | |
226 | fprintf (stderr, "%s: %s: %s\n", whoami, aout_name, | |
227 | bfd_errmsg (bfd_get_error ())); | |
228 | done (1); | |
229 | } | |
230 | ||
231 | synth_count = bfd_get_synthetic_symtab (core_bfd, core_num_syms, core_syms, | |
232 | 0, NULL, &synthsyms); | |
233 | if (synth_count > 0) | |
234 | { | |
235 | asymbol **symp; | |
236 | long new_size; | |
237 | long i; | |
238 | ||
239 | new_size = (core_num_syms + synth_count + 1) * sizeof (*core_syms); | |
240 | core_syms = (asymbol **) xrealloc (core_syms, new_size); | |
241 | symp = core_syms + core_num_syms; | |
242 | core_num_syms += synth_count; | |
243 | for (i = 0; i < synth_count; i++) | |
244 | *symp++ = synthsyms + i; | |
245 | *symp = 0; | |
246 | } | |
247 | ||
248 | min_insn_size = 1; | |
249 | offset_to_code = 0; | |
250 | ||
251 | switch (bfd_get_arch (core_bfd)) | |
252 | { | |
253 | case bfd_arch_vax: | |
254 | offset_to_code = 2; | |
255 | break; | |
256 | ||
257 | case bfd_arch_alpha: | |
258 | min_insn_size = 4; | |
259 | break; | |
260 | ||
261 | default: | |
262 | break; | |
263 | } | |
264 | ||
265 | if (function_mapping_file) | |
266 | read_function_mappings (function_mapping_file); | |
267 | } | |
268 | ||
269 | /* Read in the text space of an a.out file. */ | |
270 | ||
271 | void | |
272 | core_get_text_space (bfd *cbfd) | |
273 | { | |
274 | core_text_space = malloc (bfd_section_size (core_text_sect)); | |
275 | ||
276 | if (!core_text_space) | |
277 | { | |
278 | fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"), | |
279 | whoami, (unsigned long) bfd_section_size (core_text_sect)); | |
280 | done (1); | |
281 | } | |
282 | ||
283 | if (!bfd_get_section_contents (cbfd, core_text_sect, core_text_space, | |
284 | 0, bfd_section_size (core_text_sect))) | |
285 | { | |
286 | bfd_perror ("bfd_get_section_contents"); | |
287 | free (core_text_space); | |
288 | core_text_space = 0; | |
289 | } | |
290 | ||
291 | if (!core_text_space) | |
292 | fprintf (stderr, _("%s: can't do -c\n"), whoami); | |
293 | } | |
294 | ||
295 | ||
296 | void | |
297 | find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc) | |
298 | { | |
299 | if (core_text_space == 0) | |
300 | return; | |
301 | ||
302 | hist_clip_symbol_address (&p_lowpc, &p_highpc); | |
303 | ||
304 | switch (bfd_get_arch (core_bfd)) | |
305 | { | |
306 | case bfd_arch_i386: | |
307 | i386_find_call (parent, p_lowpc, p_highpc); | |
308 | break; | |
309 | ||
310 | case bfd_arch_alpha: | |
311 | alpha_find_call (parent, p_lowpc, p_highpc); | |
312 | break; | |
313 | ||
314 | case bfd_arch_vax: | |
315 | vax_find_call (parent, p_lowpc, p_highpc); | |
316 | break; | |
317 | ||
318 | case bfd_arch_sparc: | |
319 | sparc_find_call (parent, p_lowpc, p_highpc); | |
320 | break; | |
321 | ||
322 | case bfd_arch_mips: | |
323 | mips_find_call (parent, p_lowpc, p_highpc); | |
324 | break; | |
325 | ||
326 | case bfd_arch_aarch64: | |
327 | aarch64_find_call (parent, p_lowpc, p_highpc); | |
328 | break; | |
329 | ||
330 | default: | |
331 | fprintf (stderr, _("%s: -c not supported on architecture %s\n"), | |
332 | whoami, bfd_printable_name(core_bfd)); | |
333 | ||
334 | /* Don't give the error more than once. */ | |
335 | ignore_direct_calls = FALSE; | |
336 | } | |
337 | } | |
338 | ||
339 | /* Return class of symbol SYM. The returned class can be any of: | |
340 | 0 -> symbol is not interesting to us | |
341 | 'T' -> symbol is a global name | |
342 | 't' -> symbol is a local (static) name. */ | |
343 | ||
344 | static int | |
345 | core_sym_class (asymbol *sym) | |
346 | { | |
347 | symbol_info syminfo; | |
348 | const char *name; | |
349 | char sym_prefix; | |
350 | int i; | |
351 | ||
352 | if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0) | |
353 | return 0; | |
354 | ||
355 | /* Must be a text symbol, and static text symbols | |
356 | don't qualify if ignore_static_funcs set. */ | |
357 | if (ignore_static_funcs && (sym->flags & BSF_LOCAL)) | |
358 | { | |
359 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n", | |
360 | sym->name)); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | bfd_get_symbol_info (core_bfd, sym, &syminfo); | |
365 | i = syminfo.type; | |
366 | ||
367 | if (i == 'T') | |
368 | return i; /* It's a global symbol. */ | |
369 | ||
370 | if (i == 'W') | |
371 | /* Treat weak symbols as text symbols. FIXME: a weak symbol may | |
372 | also be a data symbol. */ | |
373 | return 'T'; | |
374 | ||
375 | if (i != 't') | |
376 | { | |
377 | /* Not a static text symbol. */ | |
378 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n", | |
379 | sym->name, i)); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* Do some more filtering on static function-names. */ | |
384 | if (ignore_static_funcs) | |
385 | return 0; | |
386 | ||
387 | /* Can't zero-length name or funny characters in name, where | |
388 | `funny' includes: `.' (.o file names) and `$' (Pascal labels). */ | |
389 | if (!sym->name || sym->name[0] == '\0') | |
390 | return 0; | |
391 | ||
392 | for (name = sym->name; *name; ++name) | |
393 | { | |
394 | if (*name == '$') | |
395 | return 0; | |
396 | ||
397 | while (*name == '.') | |
398 | { | |
399 | /* Allow both nested subprograms (which end with ".NNN", where N is | |
400 | a digit) and GCC cloned functions (which contain ".clone"). | |
401 | Allow for multiple iterations of both - apparently GCC can clone | |
402 | clones and subprograms. */ | |
403 | int digit_seen = 0; | |
404 | #define CLONE_NAME ".clone." | |
405 | #define CLONE_NAME_LEN strlen (CLONE_NAME) | |
406 | #define CONSTPROP_NAME ".constprop." | |
407 | #define CONSTPROP_NAME_LEN strlen (CONSTPROP_NAME) | |
408 | ||
409 | if (strlen (name) > CLONE_NAME_LEN | |
410 | && strncmp (name, CLONE_NAME, CLONE_NAME_LEN) == 0) | |
411 | name += CLONE_NAME_LEN - 1; | |
412 | ||
413 | else if (strlen (name) > CONSTPROP_NAME_LEN | |
414 | && strncmp (name, CONSTPROP_NAME, CONSTPROP_NAME_LEN) == 0) | |
415 | name += CONSTPROP_NAME_LEN - 1; | |
416 | ||
417 | for (name++; *name; name++) | |
418 | if (digit_seen && *name == '.') | |
419 | break; | |
420 | else if (ISDIGIT (*name)) | |
421 | digit_seen = 1; | |
422 | else | |
423 | return 0; | |
424 | } | |
425 | } | |
426 | ||
427 | /* On systems where the C compiler adds an underscore to all | |
428 | names, static names without underscores seem usually to be | |
429 | labels in hand written assembler in the library. We don't want | |
430 | these names. This is certainly necessary on a Sparc running | |
431 | SunOS 4.1 (try profiling a program that does a lot of | |
432 | division). I don't know whether it has harmful side effects on | |
433 | other systems. Perhaps it should be made configurable. */ | |
434 | sym_prefix = bfd_get_symbol_leading_char (core_bfd); | |
435 | ||
436 | if ((sym_prefix && sym_prefix != sym->name[0]) | |
437 | /* GCC may add special symbols to help gdb figure out the file | |
438 | language. We want to ignore these, since sometimes they mask | |
439 | the real function. (dj@ctron) */ | |
440 | || !strncmp (sym->name, "__gnu_compiled", 14) | |
441 | || !strncmp (sym->name, "___gnu_compiled", 15)) | |
442 | { | |
443 | return 0; | |
444 | } | |
445 | ||
446 | /* If the object file supports marking of function symbols, then | |
447 | we can zap anything that doesn't have BSF_FUNCTION set. */ | |
448 | if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0) | |
449 | return 0; | |
450 | ||
451 | return 't'; /* It's a static text symbol. */ | |
452 | } | |
453 | ||
454 | /* Get whatever source info we can get regarding address ADDR. */ | |
455 | ||
456 | static bfd_boolean | |
457 | get_src_info (bfd_vma addr, const char **filename, const char **name, int *line_num) | |
458 | { | |
459 | const char *fname = 0, *func_name = 0; | |
460 | int l = 0; | |
461 | ||
462 | if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms, | |
463 | addr - core_text_sect->vma, | |
464 | &fname, &func_name, (unsigned int *) &l) | |
465 | && fname && func_name && l) | |
466 | { | |
467 | DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n", | |
468 | (unsigned long) addr, fname, l, func_name)); | |
469 | *filename = fname; | |
470 | *name = func_name; | |
471 | *line_num = l; | |
472 | return TRUE; | |
473 | } | |
474 | else | |
475 | { | |
476 | DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n", | |
477 | (unsigned long) addr, | |
478 | fname ? fname : "<unknown>", l, | |
479 | func_name ? func_name : "<unknown>")); | |
480 | return FALSE; | |
481 | } | |
482 | } | |
483 | ||
484 | static char buf[BUFSIZE]; | |
485 | static char address[BUFSIZE]; | |
486 | static char name[BUFSIZE]; | |
487 | ||
488 | /* Return number of symbols in a symbol-table file. */ | |
489 | ||
490 | static unsigned int | |
491 | num_of_syms_in (FILE * f) | |
492 | { | |
493 | char type; | |
494 | unsigned int num = 0; | |
495 | ||
496 | while (!feof (f) && fgets (buf, BUFSIZE - 1, f)) | |
497 | { | |
498 | if (sscanf (buf, "%" STR_BUFSIZE "s %c %" STR_BUFSIZE "s", address, &type, name) == 3) | |
499 | if (type == 't' || type == 'T') | |
500 | { | |
501 | /* PR 20499 - prevent integer overflow computing argument to xmalloc. */ | |
502 | if (++num >= UINT_MAX / sizeof (Sym)) | |
503 | return -1U; | |
504 | } | |
505 | } | |
506 | ||
507 | return num; | |
508 | } | |
509 | ||
510 | /* Read symbol table from a file. */ | |
511 | ||
512 | void | |
513 | core_create_syms_from (const char * sym_table_file) | |
514 | { | |
515 | char type; | |
516 | bfd_vma min_vma = ~(bfd_vma) 0; | |
517 | bfd_vma max_vma = 0; | |
518 | FILE * f; | |
519 | ||
520 | f = fopen (sym_table_file, "r"); | |
521 | if (!f) | |
522 | { | |
523 | fprintf (stderr, _("%s: could not open %s.\n"), whoami, sym_table_file); | |
524 | done (1); | |
525 | } | |
526 | ||
527 | /* Pass 1 - determine upper bound on number of function names. */ | |
528 | symtab.len = num_of_syms_in (f); | |
529 | ||
530 | if (symtab.len == 0) | |
531 | { | |
532 | fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, sym_table_file); | |
533 | done (1); | |
534 | } | |
535 | else if (symtab.len == -1U) | |
536 | { | |
537 | fprintf (stderr, _("%s: file `%s' has too many symbols\n"), | |
538 | whoami, sym_table_file); | |
539 | done (1); | |
540 | } | |
541 | ||
542 | symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym)); | |
543 | ||
544 | /* Pass 2 - create symbols. */ | |
545 | symtab.limit = symtab.base; | |
546 | ||
547 | if (fseek (f, 0, SEEK_SET) != 0) | |
548 | { | |
549 | perror (sym_table_file); | |
550 | done (1); | |
551 | } | |
552 | ||
553 | while (!feof (f) && fgets (buf, BUFSIZE - 1, f)) | |
554 | { | |
555 | if (sscanf (buf, "%" STR_BUFSIZE "s %c %" STR_BUFSIZE "s", address, &type, name) != 3) | |
556 | continue; | |
557 | if (type != 't' && type != 'T') | |
558 | continue; | |
559 | ||
560 | sym_init (symtab.limit); | |
561 | ||
562 | sscanf (address, "%" BFD_VMA_FMT "x", &(symtab.limit->addr) ); | |
563 | ||
564 | symtab.limit->name = (char *) xmalloc (strlen (name) + 1); | |
565 | strcpy ((char *) symtab.limit->name, name); | |
566 | symtab.limit->mapped = 0; | |
567 | symtab.limit->is_func = TRUE; | |
568 | symtab.limit->is_bb_head = TRUE; | |
569 | symtab.limit->is_static = (type == 't'); | |
570 | min_vma = MIN (symtab.limit->addr, min_vma); | |
571 | max_vma = MAX (symtab.limit->addr, max_vma); | |
572 | ||
573 | ++symtab.limit; | |
574 | } | |
575 | fclose (f); | |
576 | ||
577 | symtab.len = symtab.limit - symtab.base; | |
578 | symtab_finalize (&symtab); | |
579 | } | |
580 | ||
581 | static int | |
582 | search_mapped_symbol (const void * l, const void * r) | |
583 | { | |
584 | return strcmp ((const char *) l, ((const struct function_map *) r)->function_name); | |
585 | } | |
586 | ||
587 | /* Read in symbol table from core. | |
588 | One symbol per function is entered. */ | |
589 | ||
590 | void | |
591 | core_create_function_syms (void) | |
592 | { | |
593 | bfd_vma min_vma = ~ (bfd_vma) 0; | |
594 | bfd_vma max_vma = 0; | |
595 | int cxxclass; | |
596 | long i; | |
597 | struct function_map * found = NULL; | |
598 | int core_has_func_syms = 0; | |
599 | ||
600 | switch (core_bfd->xvec->flavour) | |
601 | { | |
602 | default: | |
603 | break; | |
604 | case bfd_target_coff_flavour: | |
605 | case bfd_target_ecoff_flavour: | |
606 | case bfd_target_xcoff_flavour: | |
607 | case bfd_target_elf_flavour: | |
608 | case bfd_target_som_flavour: | |
609 | core_has_func_syms = 1; | |
610 | } | |
611 | ||
612 | /* Pass 1 - determine upper bound on number of function names. */ | |
613 | symtab.len = 0; | |
614 | ||
615 | for (i = 0; i < core_num_syms; ++i) | |
616 | { | |
617 | if (!core_sym_class (core_syms[i])) | |
618 | continue; | |
619 | ||
620 | /* Don't create a symtab entry for a function that has | |
621 | a mapping to a file, unless it's the first function | |
622 | in the file. */ | |
623 | if (symbol_map_count != 0) | |
624 | { | |
625 | /* Note: some systems (SunOS 5.8) crash if bsearch base argument | |
626 | is NULL. */ | |
627 | found = (struct function_map *) bsearch | |
628 | (core_syms[i]->name, symbol_map, symbol_map_count, | |
629 | sizeof (struct function_map), search_mapped_symbol); | |
630 | } | |
631 | if (found == NULL || found->is_first) | |
632 | ++symtab.len; | |
633 | } | |
634 | ||
635 | if (symtab.len == 0) | |
636 | { | |
637 | fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name); | |
638 | done (1); | |
639 | } | |
640 | ||
641 | symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym)); | |
642 | ||
643 | /* Pass 2 - create symbols. */ | |
644 | symtab.limit = symtab.base; | |
645 | ||
646 | for (i = 0; i < core_num_syms; ++i) | |
647 | { | |
648 | asection *sym_sec; | |
649 | ||
650 | cxxclass = core_sym_class (core_syms[i]); | |
651 | ||
652 | if (!cxxclass) | |
653 | { | |
654 | DBG (AOUTDEBUG, | |
655 | printf ("[core_create_function_syms] rejecting: 0x%lx %s\n", | |
656 | (unsigned long) core_syms[i]->value, | |
657 | core_syms[i]->name)); | |
658 | continue; | |
659 | } | |
660 | ||
661 | if (symbol_map_count != 0) | |
662 | { | |
663 | /* Note: some systems (SunOS 5.8) crash if bsearch base argument | |
664 | is NULL. */ | |
665 | found = (struct function_map *) bsearch | |
666 | (core_syms[i]->name, symbol_map, symbol_map_count, | |
667 | sizeof (struct function_map), search_mapped_symbol); | |
668 | } | |
669 | if (found && ! found->is_first) | |
670 | continue; | |
671 | ||
672 | sym_init (symtab.limit); | |
673 | ||
674 | /* Symbol offsets are always section-relative. */ | |
675 | sym_sec = core_syms[i]->section; | |
676 | symtab.limit->addr = core_syms[i]->value; | |
677 | if (sym_sec) | |
678 | symtab.limit->addr += bfd_section_vma (sym_sec); | |
679 | ||
680 | if (found) | |
681 | { | |
682 | symtab.limit->name = found->file_name; | |
683 | symtab.limit->mapped = 1; | |
684 | } | |
685 | else | |
686 | { | |
687 | symtab.limit->name = core_syms[i]->name; | |
688 | symtab.limit->mapped = 0; | |
689 | } | |
690 | ||
691 | /* Lookup filename and line number, if we can. */ | |
692 | { | |
693 | const char * filename; | |
694 | const char * func_name; | |
695 | ||
696 | if (get_src_info (symtab.limit->addr, & filename, & func_name, | |
697 | & symtab.limit->line_num)) | |
698 | { | |
699 | symtab.limit->file = source_file_lookup_path (filename); | |
700 | ||
701 | /* FIXME: Checking __osf__ here does not work with a cross | |
702 | gprof. */ | |
703 | #ifdef __osf__ | |
704 | /* Suppress symbols that are not function names. This is | |
705 | useful to suppress code-labels and aliases. | |
706 | ||
707 | This is known to be useful under DEC's OSF/1. Under SunOS 4.x, | |
708 | labels do not appear in the symbol table info, so this isn't | |
709 | necessary. */ | |
710 | ||
711 | if (strcmp (symtab.limit->name, func_name) != 0) | |
712 | { | |
713 | /* The symbol's address maps to a different name, so | |
714 | it can't be a function-entry point. This happens | |
715 | for labels, for example. */ | |
716 | DBG (AOUTDEBUG, | |
717 | printf ("[core_create_function_syms: rej %s (maps to %s)\n", | |
718 | symtab.limit->name, func_name)); | |
719 | continue; | |
720 | } | |
721 | #endif | |
722 | } | |
723 | } | |
724 | ||
725 | symtab.limit->is_func = (!core_has_func_syms | |
726 | || (core_syms[i]->flags & BSF_FUNCTION) != 0); | |
727 | symtab.limit->is_bb_head = TRUE; | |
728 | ||
729 | if (cxxclass == 't') | |
730 | symtab.limit->is_static = TRUE; | |
731 | ||
732 | /* Keep track of the minimum and maximum vma addresses used by all | |
733 | symbols. When computing the max_vma, use the ending address of the | |
734 | section containing the symbol, if available. */ | |
735 | min_vma = MIN (symtab.limit->addr, min_vma); | |
736 | if (sym_sec) | |
737 | max_vma = MAX (bfd_section_vma (sym_sec) | |
738 | + bfd_section_size (sym_sec) - 1, | |
739 | max_vma); | |
740 | else | |
741 | max_vma = MAX (symtab.limit->addr, max_vma); | |
742 | ||
743 | DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n", | |
744 | (long) (symtab.limit - symtab.base), | |
745 | symtab.limit->name, | |
746 | (unsigned long) symtab.limit->addr)); | |
747 | ++symtab.limit; | |
748 | } | |
749 | ||
750 | symtab.len = symtab.limit - symtab.base; | |
751 | symtab_finalize (&symtab); | |
752 | } | |
753 | ||
754 | /* Read in symbol table from core. | |
755 | One symbol per line of source code is entered. */ | |
756 | ||
757 | void | |
758 | core_create_line_syms (void) | |
759 | { | |
760 | char *prev_name, *prev_filename; | |
761 | unsigned int prev_name_len, prev_filename_len; | |
762 | bfd_vma vma, min_vma = ~(bfd_vma) 0, max_vma = 0; | |
763 | Sym *prev, dummy, *sym; | |
764 | const char *filename; | |
765 | int prev_line_num; | |
766 | Sym_Table ltab; | |
767 | bfd_vma vma_high; | |
768 | ||
769 | /* Create symbols for functions as usual. This is necessary in | |
770 | cases where parts of a program were not compiled with -g. For | |
771 | those parts we still want to get info at the function level. */ | |
772 | core_create_function_syms (); | |
773 | ||
774 | /* Pass 1: count the number of symbols. */ | |
775 | ||
776 | /* To find all line information, walk through all possible | |
777 | text-space addresses (one by one!) and get the debugging | |
778 | info for each address. When the debugging info changes, | |
779 | it is time to create a new symbol. | |
780 | ||
781 | Of course, this is rather slow and it would be better if | |
782 | BFD would provide an iterator for enumerating all line infos. */ | |
783 | prev_name_len = PATH_MAX; | |
784 | prev_filename_len = PATH_MAX; | |
785 | prev_name = (char *) xmalloc (prev_name_len); | |
786 | prev_filename = (char *) xmalloc (prev_filename_len); | |
787 | ltab.len = 0; | |
788 | prev_line_num = 0; | |
789 | ||
790 | vma_high = core_text_sect->vma + bfd_section_size (core_text_sect); | |
791 | for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size) | |
792 | { | |
793 | unsigned int len; | |
794 | ||
795 | if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num) | |
796 | || (prev_line_num == dummy.line_num | |
797 | && prev_name != NULL | |
798 | && strcmp (prev_name, dummy.name) == 0 | |
799 | && filename_cmp (prev_filename, filename) == 0)) | |
800 | continue; | |
801 | ||
802 | ++ltab.len; | |
803 | prev_line_num = dummy.line_num; | |
804 | ||
805 | len = strlen (dummy.name); | |
806 | if (len >= prev_name_len) | |
807 | { | |
808 | prev_name_len = len + 1024; | |
809 | free (prev_name); | |
810 | prev_name = (char *) xmalloc (prev_name_len); | |
811 | } | |
812 | ||
813 | strcpy (prev_name, dummy.name); | |
814 | len = strlen (filename); | |
815 | ||
816 | if (len >= prev_filename_len) | |
817 | { | |
818 | prev_filename_len = len + 1024; | |
819 | free (prev_filename); | |
820 | prev_filename = (char *) xmalloc (prev_filename_len); | |
821 | } | |
822 | ||
823 | strcpy (prev_filename, filename); | |
824 | ||
825 | min_vma = MIN (vma, min_vma); | |
826 | max_vma = MAX (vma, max_vma); | |
827 | } | |
828 | ||
829 | free (prev_name); | |
830 | free (prev_filename); | |
831 | ||
832 | /* Make room for function symbols, too. */ | |
833 | ltab.len += symtab.len; | |
834 | ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym)); | |
835 | ltab.limit = ltab.base; | |
836 | ||
837 | /* Pass 2 - create symbols. */ | |
838 | ||
839 | /* We now set is_static as we go along, rather than by running | |
840 | through the symbol table at the end. | |
841 | ||
842 | The old way called symtab_finalize before the is_static pass, | |
843 | causing a problem since symtab_finalize uses is_static as part of | |
844 | its address conflict resolution algorithm. Since global symbols | |
845 | were preferred over static symbols, and all line symbols were | |
846 | global at that point, static function names that conflicted with | |
847 | their own line numbers (static, but labeled as global) were | |
848 | rejected in favor of the line num. | |
849 | ||
850 | This was not the desired functionality. We always want to keep | |
851 | our function symbols and discard any conflicting line symbols. | |
852 | Perhaps symtab_finalize should be modified to make this | |
853 | distinction as well, but the current fix works and the code is a | |
854 | lot cleaner now. */ | |
855 | prev = 0; | |
856 | ||
857 | for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size) | |
858 | { | |
859 | sym_init (ltab.limit); | |
860 | ||
861 | if (!get_src_info (vma, &filename, <ab.limit->name, <ab.limit->line_num) | |
862 | || (prev && prev->line_num == ltab.limit->line_num | |
863 | && strcmp (prev->name, ltab.limit->name) == 0 | |
864 | && filename_cmp (prev->file->name, filename) == 0)) | |
865 | continue; | |
866 | ||
867 | /* Make name pointer a malloc'ed string. */ | |
868 | ltab.limit->name = xstrdup (ltab.limit->name); | |
869 | ltab.limit->file = source_file_lookup_path (filename); | |
870 | ||
871 | ltab.limit->addr = vma; | |
872 | ||
873 | /* Set is_static based on the enclosing function, using either: | |
874 | 1) the previous symbol, if it's from the same function, or | |
875 | 2) a symtab lookup. */ | |
876 | if (prev && ltab.limit->file == prev->file && | |
877 | strcmp (ltab.limit->name, prev->name) == 0) | |
878 | { | |
879 | ltab.limit->is_static = prev->is_static; | |
880 | } | |
881 | else | |
882 | { | |
883 | sym = sym_lookup(&symtab, ltab.limit->addr); | |
884 | if (sym) | |
885 | ltab.limit->is_static = sym->is_static; | |
886 | } | |
887 | ||
888 | prev = ltab.limit; | |
889 | ||
890 | DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n", | |
891 | (unsigned long) (ltab.limit - ltab.base), | |
892 | ltab.limit->name, | |
893 | (unsigned long) ltab.limit->addr)); | |
894 | ++ltab.limit; | |
895 | } | |
896 | ||
897 | /* Copy in function symbols. */ | |
898 | memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym)); | |
899 | ltab.limit += symtab.len; | |
900 | ||
901 | if ((unsigned int) (ltab.limit - ltab.base) != ltab.len) | |
902 | { | |
903 | fprintf (stderr, | |
904 | _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"), | |
905 | whoami, ltab.len, (long) (ltab.limit - ltab.base)); | |
906 | done (1); | |
907 | } | |
908 | ||
909 | /* Finalize ltab and make it symbol table. */ | |
910 | symtab_finalize (<ab); | |
911 | free (symtab.base); | |
912 | symtab = ltab; | |
913 | } |