| 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 | } |