| 1 | /* Symbol table lookup for the GNU debugger, GDB. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "symtab.h" |
| 23 | #include "gdbtypes.h" |
| 24 | #include "gdbcore.h" |
| 25 | #include "frame.h" |
| 26 | #include "target.h" |
| 27 | #include "value.h" |
| 28 | #include "symfile.h" |
| 29 | #include "objfiles.h" |
| 30 | #include "gdbcmd.h" |
| 31 | #include "call-cmds.h" |
| 32 | #include "regex.h" |
| 33 | #include "expression.h" |
| 34 | #include "language.h" |
| 35 | #include "demangle.h" |
| 36 | |
| 37 | #include <obstack.h> |
| 38 | #include <assert.h> |
| 39 | |
| 40 | #include <sys/types.h> |
| 41 | #include <fcntl.h> |
| 42 | #include <string.h> |
| 43 | #include <sys/stat.h> |
| 44 | #include <ctype.h> |
| 45 | |
| 46 | /* Prototypes for local functions */ |
| 47 | |
| 48 | extern int |
| 49 | find_methods PARAMS ((struct type *, char *, struct symbol **)); |
| 50 | |
| 51 | static void |
| 52 | completion_list_add_name PARAMS ((char *, char *, int, char *, char *)); |
| 53 | |
| 54 | static void |
| 55 | build_canonical_line_spec PARAMS ((struct symtab_and_line *, char *, char ***)); |
| 56 | |
| 57 | static struct symtabs_and_lines |
| 58 | decode_line_2 PARAMS ((struct symbol *[], int, int, char ***)); |
| 59 | |
| 60 | static void |
| 61 | rbreak_command PARAMS ((char *, int)); |
| 62 | |
| 63 | static void |
| 64 | types_info PARAMS ((char *, int)); |
| 65 | |
| 66 | static void |
| 67 | functions_info PARAMS ((char *, int)); |
| 68 | |
| 69 | static void |
| 70 | variables_info PARAMS ((char *, int)); |
| 71 | |
| 72 | static void |
| 73 | sources_info PARAMS ((char *, int)); |
| 74 | |
| 75 | static void |
| 76 | list_symbols PARAMS ((char *, int, int)); |
| 77 | |
| 78 | static void |
| 79 | output_source_filename PARAMS ((char *, int *)); |
| 80 | |
| 81 | static char * |
| 82 | operator_chars PARAMS ((char *, char **)); |
| 83 | |
| 84 | static int find_line_common PARAMS ((struct linetable *, int, int *)); |
| 85 | |
| 86 | static struct partial_symbol * |
| 87 | lookup_partial_symbol PARAMS ((struct partial_symtab *, const char *, |
| 88 | int, enum namespace)); |
| 89 | |
| 90 | static struct symtab * |
| 91 | lookup_symtab_1 PARAMS ((char *)); |
| 92 | |
| 93 | /* */ |
| 94 | |
| 95 | /* The single non-language-specific builtin type */ |
| 96 | struct type *builtin_type_error; |
| 97 | |
| 98 | /* Block in which the most recently searched-for symbol was found. |
| 99 | Might be better to make this a parameter to lookup_symbol and |
| 100 | value_of_this. */ |
| 101 | |
| 102 | const struct block *block_found; |
| 103 | |
| 104 | char no_symtab_msg[] = "No symbol table is loaded. Use the \"file\" command."; |
| 105 | |
| 106 | /* While the C++ support is still in flux, issue a possibly helpful hint on |
| 107 | using the new command completion feature on single quoted demangled C++ |
| 108 | symbols. Remove when loose ends are cleaned up. FIXME -fnf */ |
| 109 | |
| 110 | void |
| 111 | cplusplus_hint (name) |
| 112 | char *name; |
| 113 | { |
| 114 | printf_unfiltered ("Hint: try '%s<TAB> or '%s<ESC-?>\n", name, name); |
| 115 | printf_unfiltered ("(Note leading single quote.)\n"); |
| 116 | } |
| 117 | |
| 118 | /* Check for a symtab of a specific name; first in symtabs, then in |
| 119 | psymtabs. *If* there is no '/' in the name, a match after a '/' |
| 120 | in the symtab filename will also work. */ |
| 121 | |
| 122 | static struct symtab * |
| 123 | lookup_symtab_1 (name) |
| 124 | char *name; |
| 125 | { |
| 126 | register struct symtab *s; |
| 127 | register struct partial_symtab *ps; |
| 128 | register char *slash; |
| 129 | register struct objfile *objfile; |
| 130 | |
| 131 | got_symtab: |
| 132 | |
| 133 | /* First, search for an exact match */ |
| 134 | |
| 135 | ALL_SYMTABS (objfile, s) |
| 136 | if (STREQ (name, s->filename)) |
| 137 | return s; |
| 138 | |
| 139 | slash = strchr (name, '/'); |
| 140 | |
| 141 | /* Now, search for a matching tail (only if name doesn't have any dirs) */ |
| 142 | |
| 143 | if (!slash) |
| 144 | ALL_SYMTABS (objfile, s) |
| 145 | { |
| 146 | char *p = s -> filename; |
| 147 | char *tail = strrchr (p, '/'); |
| 148 | |
| 149 | if (tail) |
| 150 | p = tail + 1; |
| 151 | |
| 152 | if (STREQ (p, name)) |
| 153 | return s; |
| 154 | } |
| 155 | |
| 156 | /* Same search rules as above apply here, but now we look thru the |
| 157 | psymtabs. */ |
| 158 | |
| 159 | ps = lookup_partial_symtab (name); |
| 160 | if (!ps) |
| 161 | return (NULL); |
| 162 | |
| 163 | if (ps -> readin) |
| 164 | error ("Internal: readin %s pst for `%s' found when no symtab found.", |
| 165 | ps -> filename, name); |
| 166 | |
| 167 | s = PSYMTAB_TO_SYMTAB (ps); |
| 168 | |
| 169 | if (s) |
| 170 | return s; |
| 171 | |
| 172 | /* At this point, we have located the psymtab for this file, but |
| 173 | the conversion to a symtab has failed. This usually happens |
| 174 | when we are looking up an include file. In this case, |
| 175 | PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has |
| 176 | been created. So, we need to run through the symtabs again in |
| 177 | order to find the file. |
| 178 | XXX - This is a crock, and should be fixed inside of the the |
| 179 | symbol parsing routines. */ |
| 180 | goto got_symtab; |
| 181 | } |
| 182 | |
| 183 | /* Lookup the symbol table of a source file named NAME. Try a couple |
| 184 | of variations if the first lookup doesn't work. */ |
| 185 | |
| 186 | struct symtab * |
| 187 | lookup_symtab (name) |
| 188 | char *name; |
| 189 | { |
| 190 | register struct symtab *s; |
| 191 | register char *copy; |
| 192 | |
| 193 | s = lookup_symtab_1 (name); |
| 194 | if (s) return s; |
| 195 | |
| 196 | #if 0 |
| 197 | /* This screws c-exp.y:yylex if there is both a type "tree" and a symtab |
| 198 | "tree.c". */ |
| 199 | |
| 200 | /* If name not found as specified, see if adding ".c" helps. */ |
| 201 | /* Why is this? Is it just a user convenience? (If so, it's pretty |
| 202 | questionable in the presence of C++, FORTRAN, etc.). It's not in |
| 203 | the GDB manual. */ |
| 204 | |
| 205 | copy = (char *) alloca (strlen (name) + 3); |
| 206 | strcpy (copy, name); |
| 207 | strcat (copy, ".c"); |
| 208 | s = lookup_symtab_1 (copy); |
| 209 | if (s) return s; |
| 210 | #endif /* 0 */ |
| 211 | |
| 212 | /* We didn't find anything; die. */ |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | /* Lookup the partial symbol table of a source file named NAME. |
| 217 | *If* there is no '/' in the name, a match after a '/' |
| 218 | in the psymtab filename will also work. */ |
| 219 | |
| 220 | struct partial_symtab * |
| 221 | lookup_partial_symtab (name) |
| 222 | char *name; |
| 223 | { |
| 224 | register struct partial_symtab *pst; |
| 225 | register struct objfile *objfile; |
| 226 | |
| 227 | ALL_PSYMTABS (objfile, pst) |
| 228 | { |
| 229 | if (STREQ (name, pst -> filename)) |
| 230 | { |
| 231 | return (pst); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* Now, search for a matching tail (only if name doesn't have any dirs) */ |
| 236 | |
| 237 | if (!strchr (name, '/')) |
| 238 | ALL_PSYMTABS (objfile, pst) |
| 239 | { |
| 240 | char *p = pst -> filename; |
| 241 | char *tail = strrchr (p, '/'); |
| 242 | |
| 243 | if (tail) |
| 244 | p = tail + 1; |
| 245 | |
| 246 | if (STREQ (p, name)) |
| 247 | return (pst); |
| 248 | } |
| 249 | |
| 250 | return (NULL); |
| 251 | } |
| 252 | \f |
| 253 | /* Demangle a GDB method stub type. |
| 254 | Note that this function is g++ specific. */ |
| 255 | |
| 256 | char * |
| 257 | gdb_mangle_name (type, i, j) |
| 258 | struct type *type; |
| 259 | int i, j; |
| 260 | { |
| 261 | int mangled_name_len; |
| 262 | char *mangled_name; |
| 263 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); |
| 264 | struct fn_field *method = &f[j]; |
| 265 | char *field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
| 266 | char *physname = TYPE_FN_FIELD_PHYSNAME (f, j); |
| 267 | char *newname = type_name_no_tag (type); |
| 268 | |
| 269 | /* Does the form of physname indicate that it is the full mangled name |
| 270 | of a constructor (not just the args)? */ |
| 271 | int is_full_physname_constructor; |
| 272 | |
| 273 | int is_constructor; |
| 274 | int is_destructor = DESTRUCTOR_PREFIX_P (physname); |
| 275 | /* Need a new type prefix. */ |
| 276 | char *const_prefix = method->is_const ? "C" : ""; |
| 277 | char *volatile_prefix = method->is_volatile ? "V" : ""; |
| 278 | char buf[20]; |
| 279 | int len = (newname == NULL ? 0 : strlen (newname)); |
| 280 | |
| 281 | is_full_physname_constructor = |
| 282 | ((physname[0]=='_' && physname[1]=='_' && |
| 283 | (isdigit(physname[2]) || physname[2]=='Q' || physname[2]=='t')) |
| 284 | || (strncmp(physname, "__ct", 4) == 0)); |
| 285 | |
| 286 | is_constructor = |
| 287 | is_full_physname_constructor || (newname && STREQ(field_name, newname)); |
| 288 | |
| 289 | if (!is_destructor) |
| 290 | is_destructor = (strncmp(physname, "__dt", 4) == 0); |
| 291 | |
| 292 | #ifndef GCC_MANGLE_BUG |
| 293 | if (is_destructor || is_full_physname_constructor) |
| 294 | { |
| 295 | mangled_name = (char*) xmalloc(strlen(physname)+1); |
| 296 | strcpy(mangled_name, physname); |
| 297 | return mangled_name; |
| 298 | } |
| 299 | |
| 300 | if (len == 0) |
| 301 | { |
| 302 | sprintf (buf, "__%s%s", const_prefix, volatile_prefix); |
| 303 | if (strcmp(buf, "__") == 0) |
| 304 | buf[0] = '\0'; |
| 305 | } |
| 306 | else |
| 307 | { |
| 308 | sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len); |
| 309 | } |
| 310 | mangled_name_len = ((is_constructor ? 0 : strlen (field_name)) |
| 311 | + strlen (buf) + len |
| 312 | + strlen (physname) |
| 313 | + 1); |
| 314 | |
| 315 | /* Only needed for GNU-mangled names. ANSI-mangled names |
| 316 | work with the normal mechanisms. */ |
| 317 | if (OPNAME_PREFIX_P (field_name)) |
| 318 | { |
| 319 | char *opname = cplus_mangle_opname (field_name + 3, 0); |
| 320 | if (opname == NULL) |
| 321 | error ("No mangling for \"%s\"", field_name); |
| 322 | mangled_name_len += strlen (opname); |
| 323 | mangled_name = (char *)xmalloc (mangled_name_len); |
| 324 | |
| 325 | strncpy (mangled_name, field_name, 3); |
| 326 | mangled_name[3] = '\0'; |
| 327 | strcat (mangled_name, opname); |
| 328 | } |
| 329 | else |
| 330 | { |
| 331 | mangled_name = (char *)xmalloc (mangled_name_len); |
| 332 | if (is_constructor) |
| 333 | mangled_name[0] = '\0'; |
| 334 | else |
| 335 | strcpy (mangled_name, field_name); |
| 336 | } |
| 337 | strcat (mangled_name, buf); |
| 338 | /* If the class doesn't have a name, i.e. newname NULL, then we just |
| 339 | mangle it using 0 for the length of the class. Thus it gets mangled |
| 340 | as something starting with `::' rather than `classname::'. */ |
| 341 | if (newname != NULL) |
| 342 | strcat (mangled_name, newname); |
| 343 | |
| 344 | #else |
| 345 | |
| 346 | if (is_constructor) |
| 347 | { |
| 348 | buf[0] = '\0'; |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | sprintf (buf, "__%s%s", const_prefix, volatile_prefix); |
| 353 | } |
| 354 | |
| 355 | mangled_name_len = ((is_constructor ? 0 : strlen (field_name)) |
| 356 | + strlen (buf) + strlen (physname) + 1); |
| 357 | |
| 358 | /* Only needed for GNU-mangled names. ANSI-mangled names |
| 359 | work with the normal mechanisms. */ |
| 360 | if (OPNAME_PREFIX_P (field_name)) |
| 361 | { |
| 362 | char *opname; |
| 363 | opname = cplus_mangle_opname (field_name + 3, 0); |
| 364 | if (opname == NULL) |
| 365 | { |
| 366 | error ("No mangling for \"%s\"", field_name); |
| 367 | } |
| 368 | mangled_name_len += strlen (opname); |
| 369 | mangled_name = (char *) xmalloc (mangled_name_len); |
| 370 | |
| 371 | strncpy (mangled_name, field_name, 3); |
| 372 | strcpy (mangled_name + 3, opname); |
| 373 | } |
| 374 | else |
| 375 | { |
| 376 | mangled_name = (char *) xmalloc (mangled_name_len); |
| 377 | if (is_constructor) |
| 378 | { |
| 379 | mangled_name[0] = '\0'; |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | strcpy (mangled_name, field_name); |
| 384 | } |
| 385 | } |
| 386 | strcat (mangled_name, buf); |
| 387 | |
| 388 | #endif |
| 389 | strcat (mangled_name, physname); |
| 390 | return (mangled_name); |
| 391 | } |
| 392 | |
| 393 | \f |
| 394 | /* Find which partial symtab on contains PC. Return 0 if none. */ |
| 395 | |
| 396 | struct partial_symtab * |
| 397 | find_pc_psymtab (pc) |
| 398 | register CORE_ADDR pc; |
| 399 | { |
| 400 | register struct partial_symtab *pst; |
| 401 | register struct objfile *objfile; |
| 402 | |
| 403 | ALL_PSYMTABS (objfile, pst) |
| 404 | { |
| 405 | if (pc >= pst->textlow && pc < pst->texthigh) |
| 406 | return (pst); |
| 407 | } |
| 408 | return (NULL); |
| 409 | } |
| 410 | |
| 411 | /* Find which partial symbol within a psymtab contains PC. Return 0 |
| 412 | if none. Check all psymtabs if PSYMTAB is 0. */ |
| 413 | struct partial_symbol * |
| 414 | find_pc_psymbol (psymtab, pc) |
| 415 | struct partial_symtab *psymtab; |
| 416 | CORE_ADDR pc; |
| 417 | { |
| 418 | struct partial_symbol *best = NULL, *p; |
| 419 | CORE_ADDR best_pc; |
| 420 | |
| 421 | if (!psymtab) |
| 422 | psymtab = find_pc_psymtab (pc); |
| 423 | if (!psymtab) |
| 424 | return 0; |
| 425 | |
| 426 | best_pc = psymtab->textlow - 1; |
| 427 | |
| 428 | /* Search the global symbols as well as the static symbols, so that |
| 429 | find_pc_partial_function doesn't use a minimal symbol and thus |
| 430 | cache a bad endaddr. */ |
| 431 | for (p = psymtab->objfile->global_psymbols.list + psymtab->globals_offset; |
| 432 | (p - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset) |
| 433 | < psymtab->n_global_syms); |
| 434 | p++) |
| 435 | if (SYMBOL_NAMESPACE (p) == VAR_NAMESPACE |
| 436 | && SYMBOL_CLASS (p) == LOC_BLOCK |
| 437 | && pc >= SYMBOL_VALUE_ADDRESS (p) |
| 438 | && SYMBOL_VALUE_ADDRESS (p) > best_pc) |
| 439 | { |
| 440 | best_pc = SYMBOL_VALUE_ADDRESS (p); |
| 441 | best = p; |
| 442 | } |
| 443 | for (p = psymtab->objfile->static_psymbols.list + psymtab->statics_offset; |
| 444 | (p - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset) |
| 445 | < psymtab->n_static_syms); |
| 446 | p++) |
| 447 | if (SYMBOL_NAMESPACE (p) == VAR_NAMESPACE |
| 448 | && SYMBOL_CLASS (p) == LOC_BLOCK |
| 449 | && pc >= SYMBOL_VALUE_ADDRESS (p) |
| 450 | && SYMBOL_VALUE_ADDRESS (p) > best_pc) |
| 451 | { |
| 452 | best_pc = SYMBOL_VALUE_ADDRESS (p); |
| 453 | best = p; |
| 454 | } |
| 455 | if (best_pc == psymtab->textlow - 1) |
| 456 | return 0; |
| 457 | return best; |
| 458 | } |
| 459 | |
| 460 | \f |
| 461 | /* Find the definition for a specified symbol name NAME |
| 462 | in namespace NAMESPACE, visible from lexical block BLOCK. |
| 463 | Returns the struct symbol pointer, or zero if no symbol is found. |
| 464 | If SYMTAB is non-NULL, store the symbol table in which the |
| 465 | symbol was found there, or NULL if not found. |
| 466 | C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if |
| 467 | NAME is a field of the current implied argument `this'. If so set |
| 468 | *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero. |
| 469 | BLOCK_FOUND is set to the block in which NAME is found (in the case of |
| 470 | a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */ |
| 471 | |
| 472 | /* This function has a bunch of loops in it and it would seem to be |
| 473 | attractive to put in some QUIT's (though I'm not really sure |
| 474 | whether it can run long enough to be really important). But there |
| 475 | are a few calls for which it would appear to be bad news to quit |
| 476 | out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c, and |
| 477 | nindy_frame_chain_valid in nindy-tdep.c. (Note that there is C++ |
| 478 | code below which can error(), but that probably doesn't affect |
| 479 | these calls since they are looking for a known variable and thus |
| 480 | can probably assume it will never hit the C++ code). */ |
| 481 | |
| 482 | struct symbol * |
| 483 | lookup_symbol (name, block, namespace, is_a_field_of_this, symtab) |
| 484 | const char *name; |
| 485 | register const struct block *block; |
| 486 | const enum namespace namespace; |
| 487 | int *is_a_field_of_this; |
| 488 | struct symtab **symtab; |
| 489 | { |
| 490 | register struct symbol *sym; |
| 491 | register struct symtab *s = NULL; |
| 492 | register struct partial_symtab *ps; |
| 493 | struct blockvector *bv; |
| 494 | register struct objfile *objfile; |
| 495 | register struct block *b; |
| 496 | register struct minimal_symbol *msymbol; |
| 497 | |
| 498 | /* Search specified block and its superiors. */ |
| 499 | |
| 500 | while (block != 0) |
| 501 | { |
| 502 | sym = lookup_block_symbol (block, name, namespace); |
| 503 | if (sym) |
| 504 | { |
| 505 | block_found = block; |
| 506 | if (symtab != NULL) |
| 507 | { |
| 508 | /* Search the list of symtabs for one which contains the |
| 509 | address of the start of this block. */ |
| 510 | ALL_SYMTABS (objfile, s) |
| 511 | { |
| 512 | bv = BLOCKVECTOR (s); |
| 513 | b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 514 | if (BLOCK_START (b) <= BLOCK_START (block) |
| 515 | && BLOCK_END (b) > BLOCK_START (block)) |
| 516 | goto found; |
| 517 | } |
| 518 | found: |
| 519 | *symtab = s; |
| 520 | } |
| 521 | |
| 522 | return (sym); |
| 523 | } |
| 524 | block = BLOCK_SUPERBLOCK (block); |
| 525 | } |
| 526 | |
| 527 | /* FIXME: this code is never executed--block is always NULL at this |
| 528 | point. What is it trying to do, anyway? We already should have |
| 529 | checked the STATIC_BLOCK above (it is the superblock of top-level |
| 530 | blocks). Why is VAR_NAMESPACE special-cased? */ |
| 531 | /* Don't need to mess with the psymtabs; if we have a block, |
| 532 | that file is read in. If we don't, then we deal later with |
| 533 | all the psymtab stuff that needs checking. */ |
| 534 | if (namespace == VAR_NAMESPACE && block != NULL) |
| 535 | { |
| 536 | struct block *b; |
| 537 | /* Find the right symtab. */ |
| 538 | ALL_SYMTABS (objfile, s) |
| 539 | { |
| 540 | bv = BLOCKVECTOR (s); |
| 541 | b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 542 | if (BLOCK_START (b) <= BLOCK_START (block) |
| 543 | && BLOCK_END (b) > BLOCK_START (block)) |
| 544 | { |
| 545 | sym = lookup_block_symbol (b, name, VAR_NAMESPACE); |
| 546 | if (sym) |
| 547 | { |
| 548 | block_found = b; |
| 549 | if (symtab != NULL) |
| 550 | *symtab = s; |
| 551 | return sym; |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | |
| 558 | /* C++: If requested to do so by the caller, |
| 559 | check to see if NAME is a field of `this'. */ |
| 560 | if (is_a_field_of_this) |
| 561 | { |
| 562 | struct value *v = value_of_this (0); |
| 563 | |
| 564 | *is_a_field_of_this = 0; |
| 565 | if (v && check_field (v, name)) |
| 566 | { |
| 567 | *is_a_field_of_this = 1; |
| 568 | if (symtab != NULL) |
| 569 | *symtab = NULL; |
| 570 | return 0; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | /* Now search all global blocks. Do the symtab's first, then |
| 575 | check the psymtab's */ |
| 576 | |
| 577 | ALL_SYMTABS (objfile, s) |
| 578 | { |
| 579 | bv = BLOCKVECTOR (s); |
| 580 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 581 | sym = lookup_block_symbol (block, name, namespace); |
| 582 | if (sym) |
| 583 | { |
| 584 | block_found = block; |
| 585 | if (symtab != NULL) |
| 586 | *symtab = s; |
| 587 | return sym; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /* Check for the possibility of the symbol being a global function |
| 592 | that is stored in one of the minimal symbol tables. Eventually, all |
| 593 | global symbols might be resolved in this way. */ |
| 594 | |
| 595 | if (namespace == VAR_NAMESPACE) |
| 596 | { |
| 597 | msymbol = lookup_minimal_symbol (name, (struct objfile *) NULL); |
| 598 | if (msymbol != NULL) |
| 599 | { |
| 600 | s = find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)); |
| 601 | /* If S is NULL, there are no debug symbols for this file. |
| 602 | Skip this stuff and check for matching static symbols below. */ |
| 603 | if (s != NULL) |
| 604 | { |
| 605 | bv = BLOCKVECTOR (s); |
| 606 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 607 | sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol), |
| 608 | namespace); |
| 609 | /* We kept static functions in minimal symbol table as well as |
| 610 | in static scope. We want to find them in the symbol table. */ |
| 611 | if (!sym) { |
| 612 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 613 | sym = lookup_block_symbol (block, SYMBOL_NAME (msymbol), |
| 614 | namespace); |
| 615 | } |
| 616 | |
| 617 | /* sym == 0 if symbol was found in the minimal symbol table |
| 618 | but not in the symtab. |
| 619 | Return 0 to use the msymbol definition of "foo_". |
| 620 | |
| 621 | This happens for Fortran "foo_" symbols, |
| 622 | which are "foo" in the symtab. |
| 623 | |
| 624 | This can also happen if "asm" is used to make a |
| 625 | regular symbol but not a debugging symbol, e.g. |
| 626 | asm(".globl _main"); |
| 627 | asm("_main:"); |
| 628 | */ |
| 629 | |
| 630 | if (symtab != NULL) |
| 631 | *symtab = s; |
| 632 | return sym; |
| 633 | } |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | ALL_PSYMTABS (objfile, ps) |
| 638 | { |
| 639 | if (!ps->readin && lookup_partial_symbol (ps, name, 1, namespace)) |
| 640 | { |
| 641 | s = PSYMTAB_TO_SYMTAB(ps); |
| 642 | bv = BLOCKVECTOR (s); |
| 643 | block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 644 | sym = lookup_block_symbol (block, name, namespace); |
| 645 | if (!sym) |
| 646 | error ("Internal: global symbol `%s' found in %s psymtab but not in symtab", name, ps->filename); |
| 647 | if (symtab != NULL) |
| 648 | *symtab = s; |
| 649 | return sym; |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | /* Now search all per-file blocks. |
| 654 | Not strictly correct, but more useful than an error. |
| 655 | Do the symtabs first, then check the psymtabs */ |
| 656 | |
| 657 | ALL_SYMTABS (objfile, s) |
| 658 | { |
| 659 | bv = BLOCKVECTOR (s); |
| 660 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 661 | sym = lookup_block_symbol (block, name, namespace); |
| 662 | if (sym) |
| 663 | { |
| 664 | block_found = block; |
| 665 | if (symtab != NULL) |
| 666 | *symtab = s; |
| 667 | return sym; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | ALL_PSYMTABS (objfile, ps) |
| 672 | { |
| 673 | if (!ps->readin && lookup_partial_symbol (ps, name, 0, namespace)) |
| 674 | { |
| 675 | s = PSYMTAB_TO_SYMTAB(ps); |
| 676 | bv = BLOCKVECTOR (s); |
| 677 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 678 | sym = lookup_block_symbol (block, name, namespace); |
| 679 | if (!sym) |
| 680 | error ("Internal: static symbol `%s' found in %s psymtab but not in symtab", name, ps->filename); |
| 681 | if (symtab != NULL) |
| 682 | *symtab = s; |
| 683 | return sym; |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | /* Now search all per-file blocks for static mangled symbols. |
| 688 | Do the symtabs first, then check the psymtabs. */ |
| 689 | |
| 690 | if (namespace == VAR_NAMESPACE) |
| 691 | { |
| 692 | ALL_SYMTABS (objfile, s) |
| 693 | { |
| 694 | bv = BLOCKVECTOR (s); |
| 695 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 696 | sym = lookup_block_symbol (block, name, VAR_NAMESPACE); |
| 697 | if (sym) |
| 698 | { |
| 699 | block_found = block; |
| 700 | if (symtab != NULL) |
| 701 | *symtab = s; |
| 702 | return sym; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | ALL_PSYMTABS (objfile, ps) |
| 707 | { |
| 708 | if (!ps->readin && lookup_partial_symbol (ps, name, 0, VAR_NAMESPACE)) |
| 709 | { |
| 710 | s = PSYMTAB_TO_SYMTAB(ps); |
| 711 | bv = BLOCKVECTOR (s); |
| 712 | block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 713 | sym = lookup_block_symbol (block, name, VAR_NAMESPACE); |
| 714 | if (!sym) |
| 715 | error ("Internal: mangled static symbol `%s' found in %s psymtab but not in symtab", name, ps->filename); |
| 716 | if (symtab != NULL) |
| 717 | *symtab = s; |
| 718 | return sym; |
| 719 | } |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | if (symtab != NULL) |
| 724 | *symtab = NULL; |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | /* Look, in partial_symtab PST, for symbol NAME. Check the global |
| 729 | symbols if GLOBAL, the static symbols if not */ |
| 730 | |
| 731 | static struct partial_symbol * |
| 732 | lookup_partial_symbol (pst, name, global, namespace) |
| 733 | struct partial_symtab *pst; |
| 734 | const char *name; |
| 735 | int global; |
| 736 | enum namespace namespace; |
| 737 | { |
| 738 | struct partial_symbol *start, *psym; |
| 739 | struct partial_symbol *top, *bottom, *center; |
| 740 | int length = (global ? pst->n_global_syms : pst->n_static_syms); |
| 741 | int do_linear_search = 1; |
| 742 | |
| 743 | if (length == 0) |
| 744 | { |
| 745 | return (NULL); |
| 746 | } |
| 747 | |
| 748 | start = (global ? |
| 749 | pst->objfile->global_psymbols.list + pst->globals_offset : |
| 750 | pst->objfile->static_psymbols.list + pst->statics_offset ); |
| 751 | |
| 752 | if (global) /* This means we can use a binary search. */ |
| 753 | { |
| 754 | do_linear_search = 0; |
| 755 | |
| 756 | /* Binary search. This search is guaranteed to end with center |
| 757 | pointing at the earliest partial symbol with the correct |
| 758 | name. At that point *all* partial symbols with that name |
| 759 | will be checked against the correct namespace. */ |
| 760 | |
| 761 | bottom = start; |
| 762 | top = start + length - 1; |
| 763 | while (top > bottom) |
| 764 | { |
| 765 | center = bottom + (top - bottom) / 2; |
| 766 | assert (center < top); |
| 767 | if (!do_linear_search && SYMBOL_LANGUAGE (center) == language_cplus) |
| 768 | { |
| 769 | do_linear_search = 1; |
| 770 | } |
| 771 | if (STRCMP (SYMBOL_NAME (center), name) >= 0) |
| 772 | { |
| 773 | top = center; |
| 774 | } |
| 775 | else |
| 776 | { |
| 777 | bottom = center + 1; |
| 778 | } |
| 779 | } |
| 780 | assert (top == bottom); |
| 781 | while (STREQ (SYMBOL_NAME (top), name)) |
| 782 | { |
| 783 | if (SYMBOL_NAMESPACE (top) == namespace) |
| 784 | { |
| 785 | return top; |
| 786 | } |
| 787 | top ++; |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | /* Can't use a binary search or else we found during the binary search that |
| 792 | we should also do a linear search. */ |
| 793 | |
| 794 | if (do_linear_search) |
| 795 | { |
| 796 | for (psym = start; psym < start + length; psym++) |
| 797 | { |
| 798 | if (namespace == SYMBOL_NAMESPACE (psym)) |
| 799 | { |
| 800 | if (SYMBOL_MATCHES_NAME (psym, name)) |
| 801 | { |
| 802 | return (psym); |
| 803 | } |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | return (NULL); |
| 809 | } |
| 810 | |
| 811 | /* Find the psymtab containing main(). */ |
| 812 | /* FIXME: What about languages without main() or specially linked |
| 813 | executables that have no main() ? */ |
| 814 | |
| 815 | struct partial_symtab * |
| 816 | find_main_psymtab () |
| 817 | { |
| 818 | register struct partial_symtab *pst; |
| 819 | register struct objfile *objfile; |
| 820 | |
| 821 | ALL_PSYMTABS (objfile, pst) |
| 822 | { |
| 823 | if (lookup_partial_symbol (pst, "main", 1, VAR_NAMESPACE)) |
| 824 | { |
| 825 | return (pst); |
| 826 | } |
| 827 | } |
| 828 | return (NULL); |
| 829 | } |
| 830 | |
| 831 | /* Search BLOCK for symbol NAME in NAMESPACE. |
| 832 | |
| 833 | Note that if NAME is the demangled form of a C++ symbol, we will fail |
| 834 | to find a match during the binary search of the non-encoded names, but |
| 835 | for now we don't worry about the slight inefficiency of looking for |
| 836 | a match we'll never find, since it will go pretty quick. Once the |
| 837 | binary search terminates, we drop through and do a straight linear |
| 838 | search on the symbols. Each symbol which is marked as being a C++ |
| 839 | symbol (language_cplus set) has both the encoded and non-encoded names |
| 840 | tested for a match. */ |
| 841 | |
| 842 | struct symbol * |
| 843 | lookup_block_symbol (block, name, namespace) |
| 844 | register const struct block *block; |
| 845 | const char *name; |
| 846 | const enum namespace namespace; |
| 847 | { |
| 848 | register int bot, top, inc; |
| 849 | register struct symbol *sym; |
| 850 | register struct symbol *sym_found = NULL; |
| 851 | register int do_linear_search = 1; |
| 852 | |
| 853 | /* If the blocks's symbols were sorted, start with a binary search. */ |
| 854 | |
| 855 | if (BLOCK_SHOULD_SORT (block)) |
| 856 | { |
| 857 | /* Reset the linear search flag so if the binary search fails, we |
| 858 | won't do the linear search once unless we find some reason to |
| 859 | do so, such as finding a C++ symbol during the binary search. |
| 860 | Note that for C++ modules, ALL the symbols in a block should |
| 861 | end up marked as C++ symbols. */ |
| 862 | |
| 863 | do_linear_search = 0; |
| 864 | top = BLOCK_NSYMS (block); |
| 865 | bot = 0; |
| 866 | |
| 867 | /* Advance BOT to not far before the first symbol whose name is NAME. */ |
| 868 | |
| 869 | while (1) |
| 870 | { |
| 871 | inc = (top - bot + 1); |
| 872 | /* No need to keep binary searching for the last few bits worth. */ |
| 873 | if (inc < 4) |
| 874 | { |
| 875 | break; |
| 876 | } |
| 877 | inc = (inc >> 1) + bot; |
| 878 | sym = BLOCK_SYM (block, inc); |
| 879 | if (!do_linear_search && SYMBOL_LANGUAGE (sym) == language_cplus) |
| 880 | { |
| 881 | do_linear_search = 1; |
| 882 | } |
| 883 | if (SYMBOL_NAME (sym)[0] < name[0]) |
| 884 | { |
| 885 | bot = inc; |
| 886 | } |
| 887 | else if (SYMBOL_NAME (sym)[0] > name[0]) |
| 888 | { |
| 889 | top = inc; |
| 890 | } |
| 891 | else if (STRCMP (SYMBOL_NAME (sym), name) < 0) |
| 892 | { |
| 893 | bot = inc; |
| 894 | } |
| 895 | else |
| 896 | { |
| 897 | top = inc; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | /* Now scan forward until we run out of symbols, find one whose |
| 902 | name is greater than NAME, or find one we want. If there is |
| 903 | more than one symbol with the right name and namespace, we |
| 904 | return the first one; I believe it is now impossible for us |
| 905 | to encounter two symbols with the same name and namespace |
| 906 | here, because blocks containing argument symbols are no |
| 907 | longer sorted. */ |
| 908 | |
| 909 | top = BLOCK_NSYMS (block); |
| 910 | while (bot < top) |
| 911 | { |
| 912 | sym = BLOCK_SYM (block, bot); |
| 913 | inc = SYMBOL_NAME (sym)[0] - name[0]; |
| 914 | if (inc == 0) |
| 915 | { |
| 916 | inc = STRCMP (SYMBOL_NAME (sym), name); |
| 917 | } |
| 918 | if (inc == 0 && SYMBOL_NAMESPACE (sym) == namespace) |
| 919 | { |
| 920 | return (sym); |
| 921 | } |
| 922 | if (inc > 0) |
| 923 | { |
| 924 | break; |
| 925 | } |
| 926 | bot++; |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | /* Here if block isn't sorted, or we fail to find a match during the |
| 931 | binary search above. If during the binary search above, we find a |
| 932 | symbol which is a C++ symbol, then we have re-enabled the linear |
| 933 | search flag which was reset when starting the binary search. |
| 934 | |
| 935 | This loop is equivalent to the loop above, but hacked greatly for speed. |
| 936 | |
| 937 | Note that parameter symbols do not always show up last in the |
| 938 | list; this loop makes sure to take anything else other than |
| 939 | parameter symbols first; it only uses parameter symbols as a |
| 940 | last resort. Note that this only takes up extra computation |
| 941 | time on a match. */ |
| 942 | |
| 943 | if (do_linear_search) |
| 944 | { |
| 945 | top = BLOCK_NSYMS (block); |
| 946 | bot = 0; |
| 947 | while (bot < top) |
| 948 | { |
| 949 | sym = BLOCK_SYM (block, bot); |
| 950 | if (SYMBOL_NAMESPACE (sym) == namespace && |
| 951 | SYMBOL_MATCHES_NAME (sym, name)) |
| 952 | { |
| 953 | sym_found = sym; |
| 954 | if (SYMBOL_CLASS (sym) != LOC_ARG && |
| 955 | SYMBOL_CLASS (sym) != LOC_LOCAL_ARG && |
| 956 | SYMBOL_CLASS (sym) != LOC_REF_ARG && |
| 957 | SYMBOL_CLASS (sym) != LOC_REGPARM && |
| 958 | SYMBOL_CLASS (sym) != LOC_REGPARM_ADDR && |
| 959 | SYMBOL_CLASS (sym) != LOC_BASEREG_ARG) |
| 960 | { |
| 961 | break; |
| 962 | } |
| 963 | } |
| 964 | bot++; |
| 965 | } |
| 966 | } |
| 967 | return (sym_found); /* Will be NULL if not found. */ |
| 968 | } |
| 969 | |
| 970 | \f |
| 971 | /* Return the symbol for the function which contains a specified |
| 972 | lexical block, described by a struct block BL. */ |
| 973 | |
| 974 | struct symbol * |
| 975 | block_function (bl) |
| 976 | struct block *bl; |
| 977 | { |
| 978 | while (BLOCK_FUNCTION (bl) == 0 && BLOCK_SUPERBLOCK (bl) != 0) |
| 979 | bl = BLOCK_SUPERBLOCK (bl); |
| 980 | |
| 981 | return BLOCK_FUNCTION (bl); |
| 982 | } |
| 983 | |
| 984 | /* Find the symtab associated with PC. Look through the psymtabs and read in |
| 985 | another symtab if necessary. */ |
| 986 | |
| 987 | struct symtab * |
| 988 | find_pc_symtab (pc) |
| 989 | register CORE_ADDR pc; |
| 990 | { |
| 991 | register struct block *b; |
| 992 | struct blockvector *bv; |
| 993 | register struct symtab *s = NULL; |
| 994 | register struct symtab *best_s = NULL; |
| 995 | register struct partial_symtab *ps; |
| 996 | register struct objfile *objfile; |
| 997 | int distance = 0; |
| 998 | |
| 999 | /* Search all symtabs for the one whose file contains our address, and which |
| 1000 | is the smallest of all the ones containing the address. This is designed |
| 1001 | to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000 |
| 1002 | and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from |
| 1003 | 0x1000-0x4000, but for address 0x2345 we want to return symtab b. |
| 1004 | This is said to happen for the mips; it might be swifter to create |
| 1005 | several symtabs with the same name like xcoff does (I'm not sure). */ |
| 1006 | |
| 1007 | ALL_SYMTABS (objfile, s) |
| 1008 | { |
| 1009 | bv = BLOCKVECTOR (s); |
| 1010 | b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); |
| 1011 | if (BLOCK_START (b) <= pc |
| 1012 | && BLOCK_END (b) > pc |
| 1013 | && (distance == 0 |
| 1014 | || BLOCK_END (b) - BLOCK_START (b) < distance)) |
| 1015 | { |
| 1016 | distance = BLOCK_END (b) - BLOCK_START (b); |
| 1017 | best_s = s; |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | if (best_s != NULL) |
| 1022 | return(best_s); |
| 1023 | |
| 1024 | s = NULL; |
| 1025 | ps = find_pc_psymtab (pc); |
| 1026 | if (ps) |
| 1027 | { |
| 1028 | if (ps->readin) |
| 1029 | /* Might want to error() here (in case symtab is corrupt and |
| 1030 | will cause a core dump), but maybe we can successfully |
| 1031 | continue, so let's not. */ |
| 1032 | warning ("\ |
| 1033 | (Internal error: pc 0x%lx in read in psymtab, but not in symtab.)\n", |
| 1034 | (unsigned long) pc); |
| 1035 | s = PSYMTAB_TO_SYMTAB (ps); |
| 1036 | } |
| 1037 | return (s); |
| 1038 | } |
| 1039 | \f |
| 1040 | /* Find the closest symbol value (of any sort -- function or variable) |
| 1041 | for a given address value. Slow but complete. */ |
| 1042 | |
| 1043 | struct symbol * |
| 1044 | find_addr_symbol (addr, symtabp, symaddrp) |
| 1045 | CORE_ADDR addr; |
| 1046 | struct symtab **symtabp; |
| 1047 | CORE_ADDR *symaddrp; |
| 1048 | { |
| 1049 | struct symtab *symtab, *best_symtab; |
| 1050 | struct objfile *objfile; |
| 1051 | register int bot, top; |
| 1052 | register struct symbol *sym; |
| 1053 | register CORE_ADDR sym_addr; |
| 1054 | struct block *block; |
| 1055 | int blocknum; |
| 1056 | |
| 1057 | /* Info on best symbol seen so far */ |
| 1058 | |
| 1059 | register CORE_ADDR best_sym_addr = 0; |
| 1060 | struct symbol *best_sym = 0; |
| 1061 | |
| 1062 | /* FIXME -- we should pull in all the psymtabs, too! */ |
| 1063 | ALL_SYMTABS (objfile, symtab) |
| 1064 | { |
| 1065 | /* Search the global and static blocks in this symtab for |
| 1066 | the closest symbol-address to the desired address. */ |
| 1067 | |
| 1068 | for (blocknum = GLOBAL_BLOCK; blocknum <= STATIC_BLOCK; blocknum++) |
| 1069 | { |
| 1070 | QUIT; |
| 1071 | block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), blocknum); |
| 1072 | top = BLOCK_NSYMS (block); |
| 1073 | for (bot = 0; bot < top; bot++) |
| 1074 | { |
| 1075 | sym = BLOCK_SYM (block, bot); |
| 1076 | switch (SYMBOL_CLASS (sym)) |
| 1077 | { |
| 1078 | case LOC_STATIC: |
| 1079 | case LOC_LABEL: |
| 1080 | sym_addr = SYMBOL_VALUE_ADDRESS (sym); |
| 1081 | break; |
| 1082 | |
| 1083 | case LOC_BLOCK: |
| 1084 | sym_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 1085 | break; |
| 1086 | |
| 1087 | default: |
| 1088 | continue; |
| 1089 | } |
| 1090 | |
| 1091 | if (sym_addr <= addr) |
| 1092 | if (sym_addr > best_sym_addr) |
| 1093 | { |
| 1094 | /* Quit if we found an exact match. */ |
| 1095 | best_sym = sym; |
| 1096 | best_sym_addr = sym_addr; |
| 1097 | best_symtab = symtab; |
| 1098 | if (sym_addr == addr) |
| 1099 | goto done; |
| 1100 | } |
| 1101 | } |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | done: |
| 1106 | if (symtabp) |
| 1107 | *symtabp = best_symtab; |
| 1108 | if (symaddrp) |
| 1109 | *symaddrp = best_sym_addr; |
| 1110 | return best_sym; |
| 1111 | } |
| 1112 | |
| 1113 | |
| 1114 | /* Find the source file and line number for a given PC value. |
| 1115 | Return a structure containing a symtab pointer, a line number, |
| 1116 | and a pc range for the entire source line. |
| 1117 | The value's .pc field is NOT the specified pc. |
| 1118 | NOTCURRENT nonzero means, if specified pc is on a line boundary, |
| 1119 | use the line that ends there. Otherwise, in that case, the line |
| 1120 | that begins there is used. */ |
| 1121 | |
| 1122 | /* The big complication here is that a line may start in one file, and end just |
| 1123 | before the start of another file. This usually occurs when you #include |
| 1124 | code in the middle of a subroutine. To properly find the end of a line's PC |
| 1125 | range, we must search all symtabs associated with this compilation unit, and |
| 1126 | find the one whose first PC is closer than that of the next line in this |
| 1127 | symtab. */ |
| 1128 | |
| 1129 | /* If it's worth the effort, we could be using a binary search. */ |
| 1130 | |
| 1131 | struct symtab_and_line |
| 1132 | find_pc_line (pc, notcurrent) |
| 1133 | CORE_ADDR pc; |
| 1134 | int notcurrent; |
| 1135 | { |
| 1136 | struct symtab *s; |
| 1137 | register struct linetable *l; |
| 1138 | register int len; |
| 1139 | register int i; |
| 1140 | register struct linetable_entry *item; |
| 1141 | struct symtab_and_line val; |
| 1142 | struct blockvector *bv; |
| 1143 | |
| 1144 | /* Info on best line seen so far, and where it starts, and its file. */ |
| 1145 | |
| 1146 | struct linetable_entry *best = NULL; |
| 1147 | CORE_ADDR best_end = 0; |
| 1148 | struct symtab *best_symtab = 0; |
| 1149 | |
| 1150 | /* Store here the first line number |
| 1151 | of a file which contains the line at the smallest pc after PC. |
| 1152 | If we don't find a line whose range contains PC, |
| 1153 | we will use a line one less than this, |
| 1154 | with a range from the start of that file to the first line's pc. */ |
| 1155 | struct linetable_entry *alt = NULL; |
| 1156 | struct symtab *alt_symtab = 0; |
| 1157 | |
| 1158 | /* Info on best line seen in this file. */ |
| 1159 | |
| 1160 | struct linetable_entry *prev; |
| 1161 | |
| 1162 | /* If this pc is not from the current frame, |
| 1163 | it is the address of the end of a call instruction. |
| 1164 | Quite likely that is the start of the following statement. |
| 1165 | But what we want is the statement containing the instruction. |
| 1166 | Fudge the pc to make sure we get that. */ |
| 1167 | |
| 1168 | if (notcurrent) pc -= 1; |
| 1169 | |
| 1170 | s = find_pc_symtab (pc); |
| 1171 | if (!s) |
| 1172 | { |
| 1173 | val.symtab = 0; |
| 1174 | val.line = 0; |
| 1175 | val.pc = pc; |
| 1176 | val.end = 0; |
| 1177 | return val; |
| 1178 | } |
| 1179 | |
| 1180 | bv = BLOCKVECTOR (s); |
| 1181 | |
| 1182 | /* Look at all the symtabs that share this blockvector. |
| 1183 | They all have the same apriori range, that we found was right; |
| 1184 | but they have different line tables. */ |
| 1185 | |
| 1186 | for (; s && BLOCKVECTOR (s) == bv; s = s->next) |
| 1187 | { |
| 1188 | /* Find the best line in this symtab. */ |
| 1189 | l = LINETABLE (s); |
| 1190 | if (!l) |
| 1191 | continue; |
| 1192 | len = l->nitems; |
| 1193 | if (len <= 0) |
| 1194 | { |
| 1195 | /* I think len can be zero if the symtab lacks line numbers |
| 1196 | (e.g. gcc -g1). (Either that or the LINETABLE is NULL; |
| 1197 | I'm not sure which, and maybe it depends on the symbol |
| 1198 | reader). */ |
| 1199 | continue; |
| 1200 | } |
| 1201 | |
| 1202 | prev = NULL; |
| 1203 | item = l->item; /* Get first line info */ |
| 1204 | |
| 1205 | /* Is this file's first line closer than the first lines of other files? |
| 1206 | If so, record this file, and its first line, as best alternate. */ |
| 1207 | if (item->pc > pc && (!alt || item->pc < alt->pc)) |
| 1208 | { |
| 1209 | alt = item; |
| 1210 | alt_symtab = s; |
| 1211 | } |
| 1212 | |
| 1213 | for (i = 0; i < len; i++, item++) |
| 1214 | { |
| 1215 | /* Return the last line that did not start after PC. */ |
| 1216 | if (item->pc > pc) |
| 1217 | break; |
| 1218 | |
| 1219 | prev = item; |
| 1220 | } |
| 1221 | |
| 1222 | /* At this point, prev points at the line whose start addr is <= pc, and |
| 1223 | item points at the next line. If we ran off the end of the linetable |
| 1224 | (pc >= start of the last line), then prev == item. If pc < start of |
| 1225 | the first line, prev will not be set. */ |
| 1226 | |
| 1227 | /* Is this file's best line closer than the best in the other files? |
| 1228 | If so, record this file, and its best line, as best so far. */ |
| 1229 | |
| 1230 | if (prev && (!best || prev->pc > best->pc)) |
| 1231 | { |
| 1232 | best = prev; |
| 1233 | best_symtab = s; |
| 1234 | /* If another line is in the linetable, and its PC is closer |
| 1235 | than the best_end we currently have, take it as best_end. */ |
| 1236 | if (i < len && (best_end == 0 || best_end > item->pc)) |
| 1237 | best_end = item->pc; |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | if (!best_symtab) |
| 1242 | { |
| 1243 | if (!alt_symtab) |
| 1244 | { /* If we didn't find any line # info, just |
| 1245 | return zeros. */ |
| 1246 | val.symtab = 0; |
| 1247 | val.line = 0; |
| 1248 | val.pc = pc; |
| 1249 | val.end = 0; |
| 1250 | } |
| 1251 | else |
| 1252 | { |
| 1253 | val.symtab = alt_symtab; |
| 1254 | val.line = alt->line - 1; |
| 1255 | val.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); |
| 1256 | val.end = alt->pc; |
| 1257 | } |
| 1258 | } |
| 1259 | else |
| 1260 | { |
| 1261 | val.symtab = best_symtab; |
| 1262 | val.line = best->line; |
| 1263 | val.pc = best->pc; |
| 1264 | if (best_end && (!alt || best_end < alt->pc)) |
| 1265 | val.end = best_end; |
| 1266 | else if (alt) |
| 1267 | val.end = alt->pc; |
| 1268 | else |
| 1269 | val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)); |
| 1270 | } |
| 1271 | return val; |
| 1272 | } |
| 1273 | \f |
| 1274 | static int find_line_symtab PARAMS ((struct symtab *, int, struct linetable **, |
| 1275 | int *, int *)); |
| 1276 | |
| 1277 | /* Find line number LINE in any symtab whose name is the same as |
| 1278 | SYMTAB. |
| 1279 | |
| 1280 | If found, return 1, set *LINETABLE to the linetable in which it was |
| 1281 | found, set *INDEX to the index in the linetable of the best entry |
| 1282 | found, and set *EXACT_MATCH nonzero if the value returned is an |
| 1283 | exact match. |
| 1284 | |
| 1285 | If not found, return 0. */ |
| 1286 | |
| 1287 | static int |
| 1288 | find_line_symtab (symtab, line, linetable, index, exact_match) |
| 1289 | struct symtab *symtab; |
| 1290 | int line; |
| 1291 | struct linetable **linetable; |
| 1292 | int *index; |
| 1293 | int *exact_match; |
| 1294 | { |
| 1295 | int exact; |
| 1296 | |
| 1297 | /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE |
| 1298 | so far seen. */ |
| 1299 | |
| 1300 | int best_index; |
| 1301 | struct linetable *best_linetable; |
| 1302 | |
| 1303 | /* First try looking it up in the given symtab. */ |
| 1304 | best_linetable = LINETABLE (symtab); |
| 1305 | best_index = find_line_common (best_linetable, line, &exact); |
| 1306 | if (best_index < 0 || !exact) |
| 1307 | { |
| 1308 | /* Didn't find an exact match. So we better keep looking for |
| 1309 | another symtab with the same name. In the case of xcoff, |
| 1310 | multiple csects for one source file (produced by IBM's FORTRAN |
| 1311 | compiler) produce multiple symtabs (this is unavoidable |
| 1312 | assuming csects can be at arbitrary places in memory and that |
| 1313 | the GLOBAL_BLOCK of a symtab has a begin and end address). */ |
| 1314 | |
| 1315 | /* BEST is the smallest linenumber > LINE so far seen, |
| 1316 | or 0 if none has been seen so far. |
| 1317 | BEST_INDEX and BEST_LINETABLE identify the item for it. */ |
| 1318 | int best; |
| 1319 | |
| 1320 | struct objfile *objfile; |
| 1321 | struct symtab *s; |
| 1322 | |
| 1323 | if (best_index >= 0) |
| 1324 | best = best_linetable->item[best_index].line; |
| 1325 | else |
| 1326 | best = 0; |
| 1327 | |
| 1328 | ALL_SYMTABS (objfile, s) |
| 1329 | { |
| 1330 | struct linetable *l; |
| 1331 | int ind; |
| 1332 | |
| 1333 | if (!STREQ (symtab->filename, s->filename)) |
| 1334 | continue; |
| 1335 | l = LINETABLE (s); |
| 1336 | ind = find_line_common (l, line, &exact); |
| 1337 | if (ind >= 0) |
| 1338 | { |
| 1339 | if (exact) |
| 1340 | { |
| 1341 | best_index = ind; |
| 1342 | best_linetable = l; |
| 1343 | goto done; |
| 1344 | } |
| 1345 | if (best == 0 || l->item[ind].line < best) |
| 1346 | { |
| 1347 | best = l->item[ind].line; |
| 1348 | best_index = ind; |
| 1349 | best_linetable = l; |
| 1350 | } |
| 1351 | } |
| 1352 | } |
| 1353 | } |
| 1354 | done: |
| 1355 | if (best_index < 0) |
| 1356 | return 0; |
| 1357 | |
| 1358 | if (index) |
| 1359 | *index = best_index; |
| 1360 | if (linetable) |
| 1361 | *linetable = best_linetable; |
| 1362 | if (exact_match) |
| 1363 | *exact_match = exact; |
| 1364 | return 1; |
| 1365 | } |
| 1366 | \f |
| 1367 | /* Find the PC value for a given source file and line number. |
| 1368 | Returns zero for invalid line number. |
| 1369 | The source file is specified with a struct symtab. */ |
| 1370 | |
| 1371 | CORE_ADDR |
| 1372 | find_line_pc (symtab, line) |
| 1373 | struct symtab *symtab; |
| 1374 | int line; |
| 1375 | { |
| 1376 | struct linetable *l; |
| 1377 | int ind; |
| 1378 | |
| 1379 | if (symtab == 0) |
| 1380 | return 0; |
| 1381 | if (find_line_symtab (symtab, line, &l, &ind, NULL)) |
| 1382 | return l->item[ind].pc; |
| 1383 | else |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | /* Find the range of pc values in a line. |
| 1388 | Store the starting pc of the line into *STARTPTR |
| 1389 | and the ending pc (start of next line) into *ENDPTR. |
| 1390 | Returns 1 to indicate success. |
| 1391 | Returns 0 if could not find the specified line. */ |
| 1392 | |
| 1393 | int |
| 1394 | find_line_pc_range (sal, startptr, endptr) |
| 1395 | struct symtab_and_line sal; |
| 1396 | CORE_ADDR *startptr, *endptr; |
| 1397 | { |
| 1398 | CORE_ADDR startaddr; |
| 1399 | struct symtab_and_line found_sal; |
| 1400 | |
| 1401 | startaddr = sal.pc; |
| 1402 | if (startaddr == 0) |
| 1403 | { |
| 1404 | startaddr = find_line_pc (sal.symtab, sal.line); |
| 1405 | } |
| 1406 | if (startaddr == 0) |
| 1407 | return 0; |
| 1408 | |
| 1409 | /* This whole function is based on address. For example, if line 10 has |
| 1410 | two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then |
| 1411 | "info line *0x123" should say the line goes from 0x100 to 0x200 |
| 1412 | and "info line *0x355" should say the line goes from 0x300 to 0x400. |
| 1413 | This also insures that we never give a range like "starts at 0x134 |
| 1414 | and ends at 0x12c". */ |
| 1415 | |
| 1416 | found_sal = find_pc_line (startaddr, 0); |
| 1417 | if (found_sal.line != sal.line) |
| 1418 | { |
| 1419 | /* The specified line (sal) has zero bytes. */ |
| 1420 | *startptr = found_sal.pc; |
| 1421 | *endptr = found_sal.pc; |
| 1422 | } |
| 1423 | else |
| 1424 | { |
| 1425 | *startptr = found_sal.pc; |
| 1426 | *endptr = found_sal.end; |
| 1427 | } |
| 1428 | return 1; |
| 1429 | } |
| 1430 | |
| 1431 | /* Given a line table and a line number, return the index into the line |
| 1432 | table for the pc of the nearest line whose number is >= the specified one. |
| 1433 | Return -1 if none is found. The value is >= 0 if it is an index. |
| 1434 | |
| 1435 | Set *EXACT_MATCH nonzero if the value returned is an exact match. */ |
| 1436 | |
| 1437 | static int |
| 1438 | find_line_common (l, lineno, exact_match) |
| 1439 | register struct linetable *l; |
| 1440 | register int lineno; |
| 1441 | int *exact_match; |
| 1442 | { |
| 1443 | register int i; |
| 1444 | register int len; |
| 1445 | |
| 1446 | /* BEST is the smallest linenumber > LINENO so far seen, |
| 1447 | or 0 if none has been seen so far. |
| 1448 | BEST_INDEX identifies the item for it. */ |
| 1449 | |
| 1450 | int best_index = -1; |
| 1451 | int best = 0; |
| 1452 | |
| 1453 | if (lineno <= 0) |
| 1454 | return -1; |
| 1455 | if (l == 0) |
| 1456 | return -1; |
| 1457 | |
| 1458 | len = l->nitems; |
| 1459 | for (i = 0; i < len; i++) |
| 1460 | { |
| 1461 | register struct linetable_entry *item = &(l->item[i]); |
| 1462 | |
| 1463 | if (item->line == lineno) |
| 1464 | { |
| 1465 | /* Return the first (lowest address) entry which matches. */ |
| 1466 | *exact_match = 1; |
| 1467 | return i; |
| 1468 | } |
| 1469 | |
| 1470 | if (item->line > lineno && (best == 0 || item->line < best)) |
| 1471 | { |
| 1472 | best = item->line; |
| 1473 | best_index = i; |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | /* If we got here, we didn't get an exact match. */ |
| 1478 | |
| 1479 | *exact_match = 0; |
| 1480 | return best_index; |
| 1481 | } |
| 1482 | |
| 1483 | int |
| 1484 | find_pc_line_pc_range (pc, startptr, endptr) |
| 1485 | CORE_ADDR pc; |
| 1486 | CORE_ADDR *startptr, *endptr; |
| 1487 | { |
| 1488 | struct symtab_and_line sal; |
| 1489 | sal = find_pc_line (pc, 0); |
| 1490 | *startptr = sal.pc; |
| 1491 | *endptr = sal.end; |
| 1492 | return sal.symtab != 0; |
| 1493 | } |
| 1494 | \f |
| 1495 | /* If P is of the form "operator[ \t]+..." where `...' is |
| 1496 | some legitimate operator text, return a pointer to the |
| 1497 | beginning of the substring of the operator text. |
| 1498 | Otherwise, return "". */ |
| 1499 | static char * |
| 1500 | operator_chars (p, end) |
| 1501 | char *p; |
| 1502 | char **end; |
| 1503 | { |
| 1504 | *end = ""; |
| 1505 | if (strncmp (p, "operator", 8)) |
| 1506 | return *end; |
| 1507 | p += 8; |
| 1508 | |
| 1509 | /* Don't get faked out by `operator' being part of a longer |
| 1510 | identifier. */ |
| 1511 | if (isalpha(*p) || *p == '_' || *p == '$' || *p == '\0') |
| 1512 | return *end; |
| 1513 | |
| 1514 | /* Allow some whitespace between `operator' and the operator symbol. */ |
| 1515 | while (*p == ' ' || *p == '\t') |
| 1516 | p++; |
| 1517 | |
| 1518 | /* Recognize 'operator TYPENAME'. */ |
| 1519 | |
| 1520 | if (isalpha(*p) || *p == '_' || *p == '$') |
| 1521 | { |
| 1522 | register char *q = p+1; |
| 1523 | while (isalnum(*q) || *q == '_' || *q == '$') |
| 1524 | q++; |
| 1525 | *end = q; |
| 1526 | return p; |
| 1527 | } |
| 1528 | |
| 1529 | switch (*p) |
| 1530 | { |
| 1531 | case '!': |
| 1532 | case '=': |
| 1533 | case '*': |
| 1534 | case '/': |
| 1535 | case '%': |
| 1536 | case '^': |
| 1537 | if (p[1] == '=') |
| 1538 | *end = p+2; |
| 1539 | else |
| 1540 | *end = p+1; |
| 1541 | return p; |
| 1542 | case '<': |
| 1543 | case '>': |
| 1544 | case '+': |
| 1545 | case '-': |
| 1546 | case '&': |
| 1547 | case '|': |
| 1548 | if (p[1] == '=' || p[1] == p[0]) |
| 1549 | *end = p+2; |
| 1550 | else |
| 1551 | *end = p+1; |
| 1552 | return p; |
| 1553 | case '~': |
| 1554 | case ',': |
| 1555 | *end = p+1; |
| 1556 | return p; |
| 1557 | case '(': |
| 1558 | if (p[1] != ')') |
| 1559 | error ("`operator ()' must be specified without whitespace in `()'"); |
| 1560 | *end = p+2; |
| 1561 | return p; |
| 1562 | case '?': |
| 1563 | if (p[1] != ':') |
| 1564 | error ("`operator ?:' must be specified without whitespace in `?:'"); |
| 1565 | *end = p+2; |
| 1566 | return p; |
| 1567 | case '[': |
| 1568 | if (p[1] != ']') |
| 1569 | error ("`operator []' must be specified without whitespace in `[]'"); |
| 1570 | *end = p+2; |
| 1571 | return p; |
| 1572 | default: |
| 1573 | error ("`operator %s' not supported", p); |
| 1574 | break; |
| 1575 | } |
| 1576 | *end = ""; |
| 1577 | return *end; |
| 1578 | } |
| 1579 | |
| 1580 | /* Recursive helper function for decode_line_1. |
| 1581 | * Look for methods named NAME in type T. |
| 1582 | * Return number of matches. |
| 1583 | * Put matches in SYM_ARR (which better be big enough!). |
| 1584 | * These allocations seem to define "big enough": |
| 1585 | * sym_arr = (struct symbol **) alloca(TYPE_NFN_FIELDS_TOTAL (t) * sizeof(struct symbol*)); |
| 1586 | * Note that this function is g++ specific. |
| 1587 | */ |
| 1588 | |
| 1589 | int |
| 1590 | find_methods (t, name, sym_arr) |
| 1591 | struct type *t; |
| 1592 | char *name; |
| 1593 | struct symbol **sym_arr; |
| 1594 | { |
| 1595 | int i1 = 0; |
| 1596 | int ibase; |
| 1597 | struct symbol *sym_class; |
| 1598 | char *class_name = type_name_no_tag (t); |
| 1599 | /* Ignore this class if it doesn't have a name. This is ugly, but |
| 1600 | unless we figure out how to get the physname without the name of |
| 1601 | the class, then the loop can't do any good. */ |
| 1602 | if (class_name |
| 1603 | && (sym_class = lookup_symbol (class_name, |
| 1604 | (struct block *)NULL, |
| 1605 | STRUCT_NAMESPACE, |
| 1606 | (int *)NULL, |
| 1607 | (struct symtab **)NULL))) |
| 1608 | { |
| 1609 | int method_counter; |
| 1610 | /* FIXME: Shouldn't this just be check_stub_type (t)? */ |
| 1611 | t = SYMBOL_TYPE (sym_class); |
| 1612 | for (method_counter = TYPE_NFN_FIELDS (t) - 1; |
| 1613 | method_counter >= 0; |
| 1614 | --method_counter) |
| 1615 | { |
| 1616 | int field_counter; |
| 1617 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| 1618 | char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter); |
| 1619 | char dem_opname[64]; |
| 1620 | |
| 1621 | if (strncmp(method_name, "__", 2)==0 || |
| 1622 | strncmp(method_name, "op", 2)==0 || |
| 1623 | strncmp(method_name, "type", 4)==0 ) |
| 1624 | { |
| 1625 | if (cplus_demangle_opname(method_name, dem_opname, DMGL_ANSI)) |
| 1626 | method_name = dem_opname; |
| 1627 | else if (cplus_demangle_opname(method_name, dem_opname, 0)) |
| 1628 | method_name = dem_opname; |
| 1629 | } |
| 1630 | if (STREQ (name, method_name)) |
| 1631 | /* Find all the fields with that name. */ |
| 1632 | for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| 1633 | field_counter >= 0; |
| 1634 | --field_counter) |
| 1635 | { |
| 1636 | char *phys_name; |
| 1637 | if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| 1638 | check_stub_method (t, method_counter, field_counter); |
| 1639 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| 1640 | /* Destructor is handled by caller, dont add it to the list */ |
| 1641 | if (DESTRUCTOR_PREFIX_P (phys_name)) |
| 1642 | continue; |
| 1643 | |
| 1644 | /* FIXME: Why are we looking this up in the |
| 1645 | SYMBOL_BLOCK_VALUE (sym_class)? It is intended as a hook |
| 1646 | for nested types? If so, it should probably hook to the |
| 1647 | type, not the symbol. mipsread.c is the only symbol |
| 1648 | reader which sets the SYMBOL_BLOCK_VALUE for types, and |
| 1649 | this is not documented in symtab.h. -26Aug93. */ |
| 1650 | |
| 1651 | sym_arr[i1] = lookup_symbol (phys_name, |
| 1652 | SYMBOL_BLOCK_VALUE (sym_class), |
| 1653 | VAR_NAMESPACE, |
| 1654 | (int *) NULL, |
| 1655 | (struct symtab **) NULL); |
| 1656 | if (sym_arr[i1]) i1++; |
| 1657 | else |
| 1658 | { |
| 1659 | fputs_filtered("(Cannot find method ", gdb_stdout); |
| 1660 | fprintf_symbol_filtered (gdb_stdout, phys_name, |
| 1661 | language_cplus, |
| 1662 | DMGL_PARAMS | DMGL_ANSI); |
| 1663 | fputs_filtered(" - possibly inlined.)\n", gdb_stdout); |
| 1664 | } |
| 1665 | } |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | /* Only search baseclasses if there is no match yet, since names in |
| 1670 | derived classes override those in baseclasses. |
| 1671 | |
| 1672 | FIXME: The above is not true; it is only true of member functions |
| 1673 | if they have the same number of arguments (??? - section 13.1 of the |
| 1674 | ARM says the function members are not in the same scope but doesn't |
| 1675 | really spell out the rules in a way I understand. In any case, if |
| 1676 | the number of arguments differ this is a case in which we can overload |
| 1677 | rather than hiding without any problem, and gcc 2.4.5 does overload |
| 1678 | rather than hiding in this case). */ |
| 1679 | |
| 1680 | if (i1) |
| 1681 | return i1; |
| 1682 | for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++) |
| 1683 | i1 += find_methods(TYPE_BASECLASS(t, ibase), name, |
| 1684 | sym_arr + i1); |
| 1685 | return i1; |
| 1686 | } |
| 1687 | |
| 1688 | /* Helper function for decode_line_1. |
| 1689 | Build a canonical line spec in CANONICAL if it is non-NULL and if |
| 1690 | the SAL has a symtab. |
| 1691 | If SYMNAME is non-NULL the canonical line spec is `filename:symname'. |
| 1692 | If SYMNAME is NULL the line number from SAL is used and the canonical |
| 1693 | line spec is `filename:linenum'. */ |
| 1694 | |
| 1695 | static void |
| 1696 | build_canonical_line_spec (sal, symname, canonical) |
| 1697 | struct symtab_and_line *sal; |
| 1698 | char *symname; |
| 1699 | char ***canonical; |
| 1700 | { |
| 1701 | char **canonical_arr; |
| 1702 | char *canonical_name; |
| 1703 | char *filename; |
| 1704 | struct symtab *s = sal->symtab; |
| 1705 | |
| 1706 | if (s == (struct symtab *)NULL |
| 1707 | || s->filename == (char *)NULL |
| 1708 | || canonical == (char ***)NULL) |
| 1709 | return; |
| 1710 | |
| 1711 | canonical_arr = (char **) xmalloc (sizeof (char *)); |
| 1712 | *canonical = canonical_arr; |
| 1713 | |
| 1714 | filename = s->filename; |
| 1715 | if (symname != NULL) |
| 1716 | { |
| 1717 | canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2); |
| 1718 | sprintf (canonical_name, "%s:%s", filename, symname); |
| 1719 | } |
| 1720 | else |
| 1721 | { |
| 1722 | canonical_name = xmalloc (strlen (filename) + 30); |
| 1723 | sprintf (canonical_name, "%s:%d", filename, sal->line); |
| 1724 | } |
| 1725 | canonical_arr[0] = canonical_name; |
| 1726 | } |
| 1727 | |
| 1728 | /* Parse a string that specifies a line number. |
| 1729 | Pass the address of a char * variable; that variable will be |
| 1730 | advanced over the characters actually parsed. |
| 1731 | |
| 1732 | The string can be: |
| 1733 | |
| 1734 | LINENUM -- that line number in current file. PC returned is 0. |
| 1735 | FILE:LINENUM -- that line in that file. PC returned is 0. |
| 1736 | FUNCTION -- line number of openbrace of that function. |
| 1737 | PC returned is the start of the function. |
| 1738 | VARIABLE -- line number of definition of that variable. |
| 1739 | PC returned is 0. |
| 1740 | FILE:FUNCTION -- likewise, but prefer functions in that file. |
| 1741 | *EXPR -- line in which address EXPR appears. |
| 1742 | |
| 1743 | FUNCTION may be an undebuggable function found in minimal symbol table. |
| 1744 | |
| 1745 | If the argument FUNFIRSTLINE is nonzero, we want the first line |
| 1746 | of real code inside a function when a function is specified. |
| 1747 | |
| 1748 | DEFAULT_SYMTAB specifies the file to use if none is specified. |
| 1749 | It defaults to current_source_symtab. |
| 1750 | DEFAULT_LINE specifies the line number to use for relative |
| 1751 | line numbers (that start with signs). Defaults to current_source_line. |
| 1752 | If CANONICAL is non-NULL, store an array of strings containing the canonical |
| 1753 | line specs there if necessary. Currently overloaded member functions and |
| 1754 | line numbers or static functions without a filename yield a canonical |
| 1755 | line spec. The array and the line spec strings are allocated on the heap, |
| 1756 | it is the callers responsibility to free them. |
| 1757 | |
| 1758 | Note that it is possible to return zero for the symtab |
| 1759 | if no file is validly specified. Callers must check that. |
| 1760 | Also, the line number returned may be invalid. */ |
| 1761 | |
| 1762 | /* We allow single quotes in various places. This is a hideous |
| 1763 | kludge, which exists because the completer can't yet deal with the |
| 1764 | lack of single quotes. FIXME: write a linespec_completer which we |
| 1765 | can use as appropriate instead of make_symbol_completion_list. */ |
| 1766 | |
| 1767 | struct symtabs_and_lines |
| 1768 | decode_line_1 (argptr, funfirstline, default_symtab, default_line, canonical) |
| 1769 | char **argptr; |
| 1770 | int funfirstline; |
| 1771 | struct symtab *default_symtab; |
| 1772 | int default_line; |
| 1773 | char ***canonical; |
| 1774 | { |
| 1775 | struct symtabs_and_lines values; |
| 1776 | #ifdef HPPA_COMPILER_BUG |
| 1777 | /* FIXME: The native HP 9000/700 compiler has a bug which appears |
| 1778 | when optimizing this file with target i960-vxworks. I haven't |
| 1779 | been able to construct a simple test case. The problem is that |
| 1780 | in the second call to SKIP_PROLOGUE below, the compiler somehow |
| 1781 | does not realize that the statement val = find_pc_line (...) will |
| 1782 | change the values of the fields of val. It extracts the elements |
| 1783 | into registers at the top of the block, and does not update the |
| 1784 | registers after the call to find_pc_line. You can check this by |
| 1785 | inserting a printf at the end of find_pc_line to show what values |
| 1786 | it is returning for val.pc and val.end and another printf after |
| 1787 | the call to see what values the function actually got (remember, |
| 1788 | this is compiling with cc -O, with this patch removed). You can |
| 1789 | also examine the assembly listing: search for the second call to |
| 1790 | skip_prologue; the LDO statement before the next call to |
| 1791 | find_pc_line loads the address of the structure which |
| 1792 | find_pc_line will return; if there is a LDW just before the LDO, |
| 1793 | which fetches an element of the structure, then the compiler |
| 1794 | still has the bug. |
| 1795 | |
| 1796 | Setting val to volatile avoids the problem. We must undef |
| 1797 | volatile, because the HPPA native compiler does not define |
| 1798 | __STDC__, although it does understand volatile, and so volatile |
| 1799 | will have been defined away in defs.h. */ |
| 1800 | #undef volatile |
| 1801 | volatile struct symtab_and_line val; |
| 1802 | #define volatile /*nothing*/ |
| 1803 | #else |
| 1804 | struct symtab_and_line val; |
| 1805 | #endif |
| 1806 | register char *p, *p1; |
| 1807 | char *q, *q1, *pp; |
| 1808 | register struct symtab *s; |
| 1809 | |
| 1810 | register struct symbol *sym; |
| 1811 | /* The symtab that SYM was found in. */ |
| 1812 | struct symtab *sym_symtab; |
| 1813 | |
| 1814 | register CORE_ADDR pc; |
| 1815 | register struct minimal_symbol *msymbol; |
| 1816 | char *copy; |
| 1817 | struct symbol *sym_class; |
| 1818 | int i1; |
| 1819 | int is_quoted, has_parens; |
| 1820 | struct symbol **sym_arr; |
| 1821 | struct type *t; |
| 1822 | char *saved_arg = *argptr; |
| 1823 | extern char *gdb_completer_quote_characters; |
| 1824 | |
| 1825 | /* Defaults have defaults. */ |
| 1826 | |
| 1827 | if (default_symtab == 0) |
| 1828 | { |
| 1829 | default_symtab = current_source_symtab; |
| 1830 | default_line = current_source_line; |
| 1831 | } |
| 1832 | |
| 1833 | /* See if arg is *PC */ |
| 1834 | |
| 1835 | if (**argptr == '*') |
| 1836 | { |
| 1837 | if (**argptr == '*') |
| 1838 | { |
| 1839 | (*argptr)++; |
| 1840 | } |
| 1841 | pc = parse_and_eval_address_1 (argptr); |
| 1842 | values.sals = (struct symtab_and_line *) |
| 1843 | xmalloc (sizeof (struct symtab_and_line)); |
| 1844 | values.nelts = 1; |
| 1845 | values.sals[0] = find_pc_line (pc, 0); |
| 1846 | values.sals[0].pc = pc; |
| 1847 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 1848 | return values; |
| 1849 | } |
| 1850 | |
| 1851 | /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */ |
| 1852 | |
| 1853 | s = NULL; |
| 1854 | is_quoted = (strchr(gdb_completer_quote_characters, **argptr) != NULL); |
| 1855 | has_parens = (( pp = strchr(*argptr, '(')) != NULL && |
| 1856 | (pp = strchr(pp, ')')) != NULL); |
| 1857 | |
| 1858 | for (p = *argptr; *p; p++) |
| 1859 | { |
| 1860 | if (p[0] == '<') |
| 1861 | { |
| 1862 | while(!++p && *p != '>'); |
| 1863 | if (!p) |
| 1864 | { |
| 1865 | /* FIXME: Why warning() and then return_to_top_level? |
| 1866 | What's wrong with error()? */ |
| 1867 | warning("non-matching '<' and '>' in command"); |
| 1868 | return_to_top_level (RETURN_ERROR); |
| 1869 | } |
| 1870 | } |
| 1871 | if (p[0] == ':' || p[0] == ' ' || p[0] == '\t') |
| 1872 | break; |
| 1873 | } |
| 1874 | while (p[0] == ' ' || p[0] == '\t') p++; |
| 1875 | |
| 1876 | if ((p[0] == ':') && !has_parens) |
| 1877 | { |
| 1878 | |
| 1879 | /* C++ */ |
| 1880 | if (is_quoted) *argptr = *argptr+1; |
| 1881 | if (p[1] ==':') |
| 1882 | { |
| 1883 | /* Extract the class name. */ |
| 1884 | p1 = p; |
| 1885 | while (p != *argptr && p[-1] == ' ') --p; |
| 1886 | copy = (char *) alloca (p - *argptr + 1); |
| 1887 | memcpy (copy, *argptr, p - *argptr); |
| 1888 | copy[p - *argptr] = 0; |
| 1889 | |
| 1890 | /* Discard the class name from the arg. */ |
| 1891 | p = p1 + 2; |
| 1892 | while (*p == ' ' || *p == '\t') p++; |
| 1893 | *argptr = p; |
| 1894 | |
| 1895 | sym_class = lookup_symbol (copy, 0, STRUCT_NAMESPACE, 0, |
| 1896 | (struct symtab **)NULL); |
| 1897 | |
| 1898 | if (sym_class && |
| 1899 | ( TYPE_CODE (SYMBOL_TYPE (sym_class)) == TYPE_CODE_STRUCT |
| 1900 | || TYPE_CODE (SYMBOL_TYPE (sym_class)) == TYPE_CODE_UNION)) |
| 1901 | { |
| 1902 | /* Arg token is not digits => try it as a function name |
| 1903 | Find the next token(everything up to end or next blank). */ |
| 1904 | if (strchr(gdb_completer_quote_characters, **argptr) != NULL) |
| 1905 | { |
| 1906 | p = skip_quoted(*argptr); |
| 1907 | *argptr = *argptr + 1; |
| 1908 | } |
| 1909 | else |
| 1910 | { |
| 1911 | p = *argptr; |
| 1912 | while (*p && *p!=' ' && *p!='\t' && *p!=',' && *p!=':') p++; |
| 1913 | } |
| 1914 | /* |
| 1915 | q = operator_chars (*argptr, &q1); |
| 1916 | if (q1 - q) |
| 1917 | { |
| 1918 | char *opname; |
| 1919 | char *tmp = alloca (q1 - q + 1); |
| 1920 | memcpy (tmp, q, q1 - q); |
| 1921 | tmp[q1 - q] = '\0'; |
| 1922 | opname = cplus_mangle_opname (tmp, DMGL_ANSI); |
| 1923 | if (opname == NULL) |
| 1924 | { |
| 1925 | warning ("no mangling for \"%s\"", tmp); |
| 1926 | cplusplus_hint (saved_arg); |
| 1927 | return_to_top_level (RETURN_ERROR); |
| 1928 | } |
| 1929 | copy = (char*) alloca (3 + strlen(opname)); |
| 1930 | sprintf (copy, "__%s", opname); |
| 1931 | p = q1; |
| 1932 | } |
| 1933 | else |
| 1934 | */ |
| 1935 | { |
| 1936 | copy = (char *) alloca (p - *argptr + 1 ); |
| 1937 | memcpy (copy, *argptr, p - *argptr); |
| 1938 | copy[p - *argptr] = '\0'; |
| 1939 | if (strchr(gdb_completer_quote_characters, copy[p-*argptr-1]) != NULL) |
| 1940 | copy[p - *argptr -1] = '\0'; |
| 1941 | } |
| 1942 | |
| 1943 | /* no line number may be specified */ |
| 1944 | while (*p == ' ' || *p == '\t') p++; |
| 1945 | *argptr = p; |
| 1946 | |
| 1947 | sym = 0; |
| 1948 | i1 = 0; /* counter for the symbol array */ |
| 1949 | t = SYMBOL_TYPE (sym_class); |
| 1950 | sym_arr = (struct symbol **) alloca(TYPE_NFN_FIELDS_TOTAL (t) * sizeof(struct symbol*)); |
| 1951 | |
| 1952 | /* Cfront objects don't have fieldlists. */ |
| 1953 | if (destructor_name_p (copy, t) && TYPE_FN_FIELDLISTS (t) != NULL) |
| 1954 | { |
| 1955 | /* destructors are a special case. */ |
| 1956 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, 0); |
| 1957 | int len = TYPE_FN_FIELDLIST_LENGTH (t, 0) - 1; |
| 1958 | /* gcc 1.x puts destructor in last field, |
| 1959 | gcc 2.x puts destructor in first field. */ |
| 1960 | char *phys_name = TYPE_FN_FIELD_PHYSNAME (f, len); |
| 1961 | if (!DESTRUCTOR_PREFIX_P (phys_name)) |
| 1962 | { |
| 1963 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, 0); |
| 1964 | if (!DESTRUCTOR_PREFIX_P (phys_name)) |
| 1965 | phys_name = ""; |
| 1966 | } |
| 1967 | sym_arr[i1] = |
| 1968 | lookup_symbol (phys_name, SYMBOL_BLOCK_VALUE (sym_class), |
| 1969 | VAR_NAMESPACE, 0, (struct symtab **)NULL); |
| 1970 | if (sym_arr[i1]) i1++; |
| 1971 | } |
| 1972 | else |
| 1973 | i1 = find_methods (t, copy, sym_arr); |
| 1974 | if (i1 == 1) |
| 1975 | { |
| 1976 | /* There is exactly one field with that name. */ |
| 1977 | sym = sym_arr[0]; |
| 1978 | |
| 1979 | if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 1980 | { |
| 1981 | /* Arg is the name of a function */ |
| 1982 | pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 1983 | if (funfirstline) |
| 1984 | { |
| 1985 | pc += FUNCTION_START_OFFSET; |
| 1986 | SKIP_PROLOGUE (pc); |
| 1987 | } |
| 1988 | values.sals = (struct symtab_and_line *)xmalloc (sizeof (struct symtab_and_line)); |
| 1989 | values.nelts = 1; |
| 1990 | values.sals[0] = find_pc_line (pc, 0); |
| 1991 | values.sals[0].pc = (values.sals[0].end && values.sals[0].pc != pc) ? values.sals[0].end : pc; |
| 1992 | } |
| 1993 | else |
| 1994 | { |
| 1995 | values.nelts = 0; |
| 1996 | } |
| 1997 | return values; |
| 1998 | } |
| 1999 | if (i1 > 0) |
| 2000 | { |
| 2001 | /* There is more than one field with that name |
| 2002 | (overloaded). Ask the user which one to use. */ |
| 2003 | return decode_line_2 (sym_arr, i1, funfirstline, canonical); |
| 2004 | } |
| 2005 | else |
| 2006 | { |
| 2007 | char *tmp; |
| 2008 | |
| 2009 | if (OPNAME_PREFIX_P (copy)) |
| 2010 | { |
| 2011 | tmp = (char *)alloca (strlen (copy+3) + 9); |
| 2012 | strcpy (tmp, "operator "); |
| 2013 | strcat (tmp, copy+3); |
| 2014 | } |
| 2015 | else |
| 2016 | tmp = copy; |
| 2017 | if (tmp[0] == '~') |
| 2018 | warning ("the class `%s' does not have destructor defined", |
| 2019 | SYMBOL_SOURCE_NAME(sym_class)); |
| 2020 | else |
| 2021 | warning ("the class %s does not have any method named %s", |
| 2022 | SYMBOL_SOURCE_NAME(sym_class), tmp); |
| 2023 | cplusplus_hint (saved_arg); |
| 2024 | return_to_top_level (RETURN_ERROR); |
| 2025 | } |
| 2026 | } |
| 2027 | else |
| 2028 | { |
| 2029 | /* The quotes are important if copy is empty. */ |
| 2030 | warning ("can't find class, struct, or union named \"%s\"", |
| 2031 | copy); |
| 2032 | cplusplus_hint (saved_arg); |
| 2033 | return_to_top_level (RETURN_ERROR); |
| 2034 | } |
| 2035 | } |
| 2036 | /* end of C++ */ |
| 2037 | |
| 2038 | |
| 2039 | /* Extract the file name. */ |
| 2040 | p1 = p; |
| 2041 | while (p != *argptr && p[-1] == ' ') --p; |
| 2042 | copy = (char *) alloca (p - *argptr + 1); |
| 2043 | memcpy (copy, *argptr, p - *argptr); |
| 2044 | copy[p - *argptr] = 0; |
| 2045 | |
| 2046 | /* Find that file's data. */ |
| 2047 | s = lookup_symtab (copy); |
| 2048 | if (s == 0) |
| 2049 | { |
| 2050 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 2051 | error (no_symtab_msg); |
| 2052 | error ("No source file named %s.", copy); |
| 2053 | } |
| 2054 | |
| 2055 | /* Discard the file name from the arg. */ |
| 2056 | p = p1 + 1; |
| 2057 | while (*p == ' ' || *p == '\t') p++; |
| 2058 | *argptr = p; |
| 2059 | } |
| 2060 | |
| 2061 | /* S is specified file's symtab, or 0 if no file specified. |
| 2062 | arg no longer contains the file name. */ |
| 2063 | |
| 2064 | /* Check whether arg is all digits (and sign) */ |
| 2065 | |
| 2066 | q = *argptr; |
| 2067 | if (*q == '-' || *q == '+') q++; |
| 2068 | while (*q >= '0' && *q <= '9') |
| 2069 | q++; |
| 2070 | |
| 2071 | if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')) |
| 2072 | { |
| 2073 | /* We found a token consisting of all digits -- at least one digit. */ |
| 2074 | enum sign {none, plus, minus} sign = none; |
| 2075 | |
| 2076 | /* We might need a canonical line spec if no file was specified. */ |
| 2077 | int need_canonical = (s == 0) ? 1 : 0; |
| 2078 | |
| 2079 | /* This is where we need to make sure that we have good defaults. |
| 2080 | We must guarantee that this section of code is never executed |
| 2081 | when we are called with just a function name, since |
| 2082 | select_source_symtab calls us with such an argument */ |
| 2083 | |
| 2084 | if (s == 0 && default_symtab == 0) |
| 2085 | { |
| 2086 | select_source_symtab (0); |
| 2087 | default_symtab = current_source_symtab; |
| 2088 | default_line = current_source_line; |
| 2089 | } |
| 2090 | |
| 2091 | if (**argptr == '+') |
| 2092 | sign = plus, (*argptr)++; |
| 2093 | else if (**argptr == '-') |
| 2094 | sign = minus, (*argptr)++; |
| 2095 | val.line = atoi (*argptr); |
| 2096 | switch (sign) |
| 2097 | { |
| 2098 | case plus: |
| 2099 | if (q == *argptr) |
| 2100 | val.line = 5; |
| 2101 | if (s == 0) |
| 2102 | val.line = default_line + val.line; |
| 2103 | break; |
| 2104 | case minus: |
| 2105 | if (q == *argptr) |
| 2106 | val.line = 15; |
| 2107 | if (s == 0) |
| 2108 | val.line = default_line - val.line; |
| 2109 | else |
| 2110 | val.line = 1; |
| 2111 | break; |
| 2112 | case none: |
| 2113 | break; /* No need to adjust val.line. */ |
| 2114 | } |
| 2115 | |
| 2116 | while (*q == ' ' || *q == '\t') q++; |
| 2117 | *argptr = q; |
| 2118 | if (s == 0) |
| 2119 | s = default_symtab; |
| 2120 | val.symtab = s; |
| 2121 | val.pc = 0; |
| 2122 | values.sals = (struct symtab_and_line *)xmalloc (sizeof (struct symtab_and_line)); |
| 2123 | values.sals[0] = val; |
| 2124 | values.nelts = 1; |
| 2125 | if (need_canonical) |
| 2126 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 2127 | return values; |
| 2128 | } |
| 2129 | |
| 2130 | /* Arg token is not digits => try it as a variable name |
| 2131 | Find the next token (everything up to end or next whitespace). */ |
| 2132 | |
| 2133 | if (is_quoted) |
| 2134 | { |
| 2135 | p = skip_quoted (*argptr); |
| 2136 | if (p[-1] != '\'') |
| 2137 | error ("Unmatched single quote."); |
| 2138 | } |
| 2139 | else if (has_parens) |
| 2140 | { |
| 2141 | p = pp+1; |
| 2142 | } |
| 2143 | else |
| 2144 | { |
| 2145 | p = skip_quoted(*argptr); |
| 2146 | } |
| 2147 | |
| 2148 | copy = (char *) alloca (p - *argptr + 1); |
| 2149 | memcpy (copy, *argptr, p - *argptr); |
| 2150 | copy[p - *argptr] = '\0'; |
| 2151 | if ((copy[0] == copy [p - *argptr - 1]) |
| 2152 | && strchr (gdb_completer_quote_characters, copy[0]) != NULL) |
| 2153 | { |
| 2154 | copy [p - *argptr - 1] = '\0'; |
| 2155 | copy++; |
| 2156 | } |
| 2157 | while (*p == ' ' || *p == '\t') p++; |
| 2158 | *argptr = p; |
| 2159 | |
| 2160 | /* Look up that token as a variable. |
| 2161 | If file specified, use that file's per-file block to start with. */ |
| 2162 | |
| 2163 | sym = lookup_symbol (copy, |
| 2164 | (s ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) |
| 2165 | : get_selected_block ()), |
| 2166 | VAR_NAMESPACE, 0, &sym_symtab); |
| 2167 | |
| 2168 | if (sym != NULL) |
| 2169 | { |
| 2170 | if (SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 2171 | { |
| 2172 | /* Arg is the name of a function */ |
| 2173 | pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); |
| 2174 | if (funfirstline) |
| 2175 | { |
| 2176 | pc += FUNCTION_START_OFFSET; |
| 2177 | SKIP_PROLOGUE (pc); |
| 2178 | } |
| 2179 | val = find_pc_line (pc, 0); |
| 2180 | #ifdef PROLOGUE_FIRSTLINE_OVERLAP |
| 2181 | /* Convex: no need to suppress code on first line, if any */ |
| 2182 | val.pc = pc; |
| 2183 | #else |
| 2184 | /* Check if SKIP_PROLOGUE left us in mid-line, and the next |
| 2185 | line is still part of the same function. */ |
| 2186 | if (val.pc != pc |
| 2187 | && BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= val.end |
| 2188 | && val.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym))) |
| 2189 | { |
| 2190 | /* First pc of next line */ |
| 2191 | pc = val.end; |
| 2192 | /* Recalculate the line number (might not be N+1). */ |
| 2193 | val = find_pc_line (pc, 0); |
| 2194 | } |
| 2195 | val.pc = pc; |
| 2196 | #endif |
| 2197 | values.sals = (struct symtab_and_line *)xmalloc (sizeof (struct symtab_and_line)); |
| 2198 | values.sals[0] = val; |
| 2199 | values.nelts = 1; |
| 2200 | |
| 2201 | /* Don't use the SYMBOL_LINE; if used at all it points to |
| 2202 | the line containing the parameters or thereabouts, not |
| 2203 | the first line of code. */ |
| 2204 | |
| 2205 | /* We might need a canonical line spec if it is a static |
| 2206 | function. */ |
| 2207 | if (s == 0) |
| 2208 | { |
| 2209 | struct blockvector *bv = BLOCKVECTOR (sym_symtab); |
| 2210 | struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 2211 | if (lookup_block_symbol (b, copy, VAR_NAMESPACE) != NULL) |
| 2212 | build_canonical_line_spec (values.sals, copy, canonical); |
| 2213 | } |
| 2214 | return values; |
| 2215 | } |
| 2216 | else if (SYMBOL_LINE (sym) != 0) |
| 2217 | { |
| 2218 | /* We know its line number. */ |
| 2219 | values.sals = (struct symtab_and_line *) |
| 2220 | xmalloc (sizeof (struct symtab_and_line)); |
| 2221 | values.nelts = 1; |
| 2222 | memset (&values.sals[0], 0, sizeof (values.sals[0])); |
| 2223 | values.sals[0].symtab = sym_symtab; |
| 2224 | values.sals[0].line = SYMBOL_LINE (sym); |
| 2225 | return values; |
| 2226 | } |
| 2227 | else |
| 2228 | /* This can happen if it is compiled with a compiler which doesn't |
| 2229 | put out line numbers for variables. */ |
| 2230 | /* FIXME: Shouldn't we just set .line and .symtab to zero and |
| 2231 | return? For example, "info line foo" could print the address. */ |
| 2232 | error ("Line number not known for symbol \"%s\"", copy); |
| 2233 | } |
| 2234 | |
| 2235 | msymbol = lookup_minimal_symbol (copy, (struct objfile *) NULL); |
| 2236 | if (msymbol != NULL) |
| 2237 | { |
| 2238 | val.symtab = 0; |
| 2239 | val.line = 0; |
| 2240 | val.pc = SYMBOL_VALUE_ADDRESS (msymbol); |
| 2241 | if (funfirstline) |
| 2242 | { |
| 2243 | val.pc += FUNCTION_START_OFFSET; |
| 2244 | SKIP_PROLOGUE (val.pc); |
| 2245 | } |
| 2246 | values.sals = (struct symtab_and_line *)xmalloc (sizeof (struct symtab_and_line)); |
| 2247 | values.sals[0] = val; |
| 2248 | values.nelts = 1; |
| 2249 | return values; |
| 2250 | } |
| 2251 | |
| 2252 | if (!have_full_symbols () && |
| 2253 | !have_partial_symbols () && !have_minimal_symbols ()) |
| 2254 | error (no_symtab_msg); |
| 2255 | |
| 2256 | error ("Function \"%s\" not defined.", copy); |
| 2257 | return values; /* for lint */ |
| 2258 | } |
| 2259 | |
| 2260 | struct symtabs_and_lines |
| 2261 | decode_line_spec (string, funfirstline) |
| 2262 | char *string; |
| 2263 | int funfirstline; |
| 2264 | { |
| 2265 | struct symtabs_and_lines sals; |
| 2266 | if (string == 0) |
| 2267 | error ("Empty line specification."); |
| 2268 | sals = decode_line_1 (&string, funfirstline, |
| 2269 | current_source_symtab, current_source_line, |
| 2270 | (char ***)NULL); |
| 2271 | if (*string) |
| 2272 | error ("Junk at end of line specification: %s", string); |
| 2273 | return sals; |
| 2274 | } |
| 2275 | |
| 2276 | /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to |
| 2277 | operate on (ask user if necessary). |
| 2278 | If CANONICAL is non-NULL return a corresponding array of mangled names |
| 2279 | as canonical line specs there. */ |
| 2280 | |
| 2281 | static struct symtabs_and_lines |
| 2282 | decode_line_2 (sym_arr, nelts, funfirstline, canonical) |
| 2283 | struct symbol *sym_arr[]; |
| 2284 | int nelts; |
| 2285 | int funfirstline; |
| 2286 | char ***canonical; |
| 2287 | { |
| 2288 | struct symtabs_and_lines values, return_values; |
| 2289 | register CORE_ADDR pc; |
| 2290 | char *args, *arg1; |
| 2291 | int i; |
| 2292 | char *prompt; |
| 2293 | char *symname; |
| 2294 | struct cleanup *old_chain; |
| 2295 | char **canonical_arr = (char **)NULL; |
| 2296 | |
| 2297 | values.sals = (struct symtab_and_line *) alloca (nelts * sizeof(struct symtab_and_line)); |
| 2298 | return_values.sals = (struct symtab_and_line *) xmalloc (nelts * sizeof(struct symtab_and_line)); |
| 2299 | old_chain = make_cleanup (free, return_values.sals); |
| 2300 | |
| 2301 | if (canonical) |
| 2302 | { |
| 2303 | canonical_arr = (char **) xmalloc (nelts * sizeof (char *)); |
| 2304 | make_cleanup (free, canonical_arr); |
| 2305 | memset (canonical_arr, 0, nelts * sizeof (char *)); |
| 2306 | *canonical = canonical_arr; |
| 2307 | } |
| 2308 | |
| 2309 | i = 0; |
| 2310 | printf_unfiltered("[0] cancel\n[1] all\n"); |
| 2311 | while (i < nelts) |
| 2312 | { |
| 2313 | if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) |
| 2314 | { |
| 2315 | /* Arg is the name of a function */ |
| 2316 | pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym_arr[i])); |
| 2317 | if (funfirstline) |
| 2318 | { |
| 2319 | pc += FUNCTION_START_OFFSET; |
| 2320 | SKIP_PROLOGUE (pc); |
| 2321 | } |
| 2322 | values.sals[i] = find_pc_line (pc, 0); |
| 2323 | values.sals[i].pc = (values.sals[i].end && values.sals[i].pc != pc) ? |
| 2324 | values.sals[i].end : pc; |
| 2325 | printf_unfiltered("[%d] %s at %s:%d\n", (i+2), SYMBOL_SOURCE_NAME (sym_arr[i]), |
| 2326 | values.sals[i].symtab->filename, values.sals[i].line); |
| 2327 | } |
| 2328 | else printf_unfiltered ("?HERE\n"); |
| 2329 | i++; |
| 2330 | } |
| 2331 | |
| 2332 | if ((prompt = getenv ("PS2")) == NULL) |
| 2333 | { |
| 2334 | prompt = ">"; |
| 2335 | } |
| 2336 | printf_unfiltered("%s ",prompt); |
| 2337 | gdb_flush(gdb_stdout); |
| 2338 | |
| 2339 | args = command_line_input ((char *) NULL, 0); |
| 2340 | |
| 2341 | if (args == 0 || *args == 0) |
| 2342 | error_no_arg ("one or more choice numbers"); |
| 2343 | |
| 2344 | i = 0; |
| 2345 | while (*args) |
| 2346 | { |
| 2347 | int num; |
| 2348 | |
| 2349 | arg1 = args; |
| 2350 | while (*arg1 >= '0' && *arg1 <= '9') arg1++; |
| 2351 | if (*arg1 && *arg1 != ' ' && *arg1 != '\t') |
| 2352 | error ("Arguments must be choice numbers."); |
| 2353 | |
| 2354 | num = atoi (args); |
| 2355 | |
| 2356 | if (num == 0) |
| 2357 | error ("cancelled"); |
| 2358 | else if (num == 1) |
| 2359 | { |
| 2360 | if (canonical_arr) |
| 2361 | { |
| 2362 | for (i = 0; i < nelts; i++) |
| 2363 | { |
| 2364 | if (canonical_arr[i] == NULL) |
| 2365 | { |
| 2366 | symname = SYMBOL_NAME (sym_arr[i]); |
| 2367 | canonical_arr[i] = savestring (symname, strlen (symname)); |
| 2368 | } |
| 2369 | } |
| 2370 | } |
| 2371 | memcpy (return_values.sals, values.sals, |
| 2372 | (nelts * sizeof(struct symtab_and_line))); |
| 2373 | return_values.nelts = nelts; |
| 2374 | discard_cleanups (old_chain); |
| 2375 | return return_values; |
| 2376 | } |
| 2377 | |
| 2378 | if (num > nelts + 2) |
| 2379 | { |
| 2380 | printf_unfiltered ("No choice number %d.\n", num); |
| 2381 | } |
| 2382 | else |
| 2383 | { |
| 2384 | num -= 2; |
| 2385 | if (values.sals[num].pc) |
| 2386 | { |
| 2387 | if (canonical_arr) |
| 2388 | { |
| 2389 | symname = SYMBOL_NAME (sym_arr[num]); |
| 2390 | make_cleanup (free, symname); |
| 2391 | canonical_arr[i] = savestring (symname, strlen (symname)); |
| 2392 | } |
| 2393 | return_values.sals[i++] = values.sals[num]; |
| 2394 | values.sals[num].pc = 0; |
| 2395 | } |
| 2396 | else |
| 2397 | { |
| 2398 | printf_unfiltered ("duplicate request for %d ignored.\n", num); |
| 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | args = arg1; |
| 2403 | while (*args == ' ' || *args == '\t') args++; |
| 2404 | } |
| 2405 | return_values.nelts = i; |
| 2406 | discard_cleanups (old_chain); |
| 2407 | return return_values; |
| 2408 | } |
| 2409 | |
| 2410 | \f |
| 2411 | /* Slave routine for sources_info. Force line breaks at ,'s. |
| 2412 | NAME is the name to print and *FIRST is nonzero if this is the first |
| 2413 | name printed. Set *FIRST to zero. */ |
| 2414 | static void |
| 2415 | output_source_filename (name, first) |
| 2416 | char *name; |
| 2417 | int *first; |
| 2418 | { |
| 2419 | /* Table of files printed so far. Since a single source file can |
| 2420 | result in several partial symbol tables, we need to avoid printing |
| 2421 | it more than once. Note: if some of the psymtabs are read in and |
| 2422 | some are not, it gets printed both under "Source files for which |
| 2423 | symbols have been read" and "Source files for which symbols will |
| 2424 | be read in on demand". I consider this a reasonable way to deal |
| 2425 | with the situation. I'm not sure whether this can also happen for |
| 2426 | symtabs; it doesn't hurt to check. */ |
| 2427 | static char **tab = NULL; |
| 2428 | /* Allocated size of tab in elements. |
| 2429 | Start with one 256-byte block (when using GNU malloc.c). |
| 2430 | 24 is the malloc overhead when range checking is in effect. */ |
| 2431 | static int tab_alloc_size = (256 - 24) / sizeof (char *); |
| 2432 | /* Current size of tab in elements. */ |
| 2433 | static int tab_cur_size; |
| 2434 | |
| 2435 | char **p; |
| 2436 | |
| 2437 | if (*first) |
| 2438 | { |
| 2439 | if (tab == NULL) |
| 2440 | tab = (char **) xmalloc (tab_alloc_size * sizeof (*tab)); |
| 2441 | tab_cur_size = 0; |
| 2442 | } |
| 2443 | |
| 2444 | /* Is NAME in tab? */ |
| 2445 | for (p = tab; p < tab + tab_cur_size; p++) |
| 2446 | if (STREQ (*p, name)) |
| 2447 | /* Yes; don't print it again. */ |
| 2448 | return; |
| 2449 | /* No; add it to tab. */ |
| 2450 | if (tab_cur_size == tab_alloc_size) |
| 2451 | { |
| 2452 | tab_alloc_size *= 2; |
| 2453 | tab = (char **) xrealloc ((char *) tab, tab_alloc_size * sizeof (*tab)); |
| 2454 | } |
| 2455 | tab[tab_cur_size++] = name; |
| 2456 | |
| 2457 | if (*first) |
| 2458 | { |
| 2459 | *first = 0; |
| 2460 | } |
| 2461 | else |
| 2462 | { |
| 2463 | printf_filtered (", "); |
| 2464 | } |
| 2465 | |
| 2466 | wrap_here (""); |
| 2467 | fputs_filtered (name, gdb_stdout); |
| 2468 | } |
| 2469 | |
| 2470 | static void |
| 2471 | sources_info (ignore, from_tty) |
| 2472 | char *ignore; |
| 2473 | int from_tty; |
| 2474 | { |
| 2475 | register struct symtab *s; |
| 2476 | register struct partial_symtab *ps; |
| 2477 | register struct objfile *objfile; |
| 2478 | int first; |
| 2479 | |
| 2480 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 2481 | { |
| 2482 | error (no_symtab_msg); |
| 2483 | } |
| 2484 | |
| 2485 | printf_filtered ("Source files for which symbols have been read in:\n\n"); |
| 2486 | |
| 2487 | first = 1; |
| 2488 | ALL_SYMTABS (objfile, s) |
| 2489 | { |
| 2490 | output_source_filename (s -> filename, &first); |
| 2491 | } |
| 2492 | printf_filtered ("\n\n"); |
| 2493 | |
| 2494 | printf_filtered ("Source files for which symbols will be read in on demand:\n\n"); |
| 2495 | |
| 2496 | first = 1; |
| 2497 | ALL_PSYMTABS (objfile, ps) |
| 2498 | { |
| 2499 | if (!ps->readin) |
| 2500 | { |
| 2501 | output_source_filename (ps -> filename, &first); |
| 2502 | } |
| 2503 | } |
| 2504 | printf_filtered ("\n"); |
| 2505 | } |
| 2506 | |
| 2507 | /* List all symbols (if REGEXP is NULL) or all symbols matching REGEXP. |
| 2508 | If CLASS is zero, list all symbols except functions, type names, and |
| 2509 | constants (enums). |
| 2510 | If CLASS is 1, list only functions. |
| 2511 | If CLASS is 2, list only type names. |
| 2512 | If CLASS is 3, list only method names. |
| 2513 | |
| 2514 | BPT is non-zero if we should set a breakpoint at the functions |
| 2515 | we find. */ |
| 2516 | |
| 2517 | static void |
| 2518 | list_symbols (regexp, class, bpt) |
| 2519 | char *regexp; |
| 2520 | int class; |
| 2521 | int bpt; |
| 2522 | { |
| 2523 | register struct symtab *s; |
| 2524 | register struct partial_symtab *ps; |
| 2525 | register struct blockvector *bv; |
| 2526 | struct blockvector *prev_bv = 0; |
| 2527 | register struct block *b; |
| 2528 | register int i, j; |
| 2529 | register struct symbol *sym; |
| 2530 | struct partial_symbol *psym; |
| 2531 | struct objfile *objfile; |
| 2532 | struct minimal_symbol *msymbol; |
| 2533 | char *val; |
| 2534 | static char *classnames[] |
| 2535 | = {"variable", "function", "type", "method"}; |
| 2536 | int found_in_file = 0; |
| 2537 | int found_misc = 0; |
| 2538 | static enum minimal_symbol_type types[] |
| 2539 | = {mst_data, mst_text, mst_abs, mst_unknown}; |
| 2540 | static enum minimal_symbol_type types2[] |
| 2541 | = {mst_bss, mst_text, mst_abs, mst_unknown}; |
| 2542 | enum minimal_symbol_type ourtype = types[class]; |
| 2543 | enum minimal_symbol_type ourtype2 = types2[class]; |
| 2544 | |
| 2545 | if (regexp != NULL) |
| 2546 | { |
| 2547 | /* Make sure spacing is right for C++ operators. |
| 2548 | This is just a courtesy to make the matching less sensitive |
| 2549 | to how many spaces the user leaves between 'operator' |
| 2550 | and <TYPENAME> or <OPERATOR>. */ |
| 2551 | char *opend; |
| 2552 | char *opname = operator_chars (regexp, &opend); |
| 2553 | if (*opname) |
| 2554 | { |
| 2555 | int fix = -1; /* -1 means ok; otherwise number of spaces needed. */ |
| 2556 | if (isalpha(*opname) || *opname == '_' || *opname == '$') |
| 2557 | { |
| 2558 | /* There should 1 space between 'operator' and 'TYPENAME'. */ |
| 2559 | if (opname[-1] != ' ' || opname[-2] == ' ') |
| 2560 | fix = 1; |
| 2561 | } |
| 2562 | else |
| 2563 | { |
| 2564 | /* There should 0 spaces between 'operator' and 'OPERATOR'. */ |
| 2565 | if (opname[-1] == ' ') |
| 2566 | fix = 0; |
| 2567 | } |
| 2568 | /* If wrong number of spaces, fix it. */ |
| 2569 | if (fix >= 0) |
| 2570 | { |
| 2571 | char *tmp = (char*) alloca(opend-opname+10); |
| 2572 | sprintf(tmp, "operator%.*s%s", fix, " ", opname); |
| 2573 | regexp = tmp; |
| 2574 | } |
| 2575 | } |
| 2576 | |
| 2577 | if (0 != (val = re_comp (regexp))) |
| 2578 | error ("Invalid regexp (%s): %s", val, regexp); |
| 2579 | } |
| 2580 | |
| 2581 | /* Search through the partial symtabs *first* for all symbols |
| 2582 | matching the regexp. That way we don't have to reproduce all of |
| 2583 | the machinery below. */ |
| 2584 | |
| 2585 | ALL_PSYMTABS (objfile, ps) |
| 2586 | { |
| 2587 | struct partial_symbol *bound, *gbound, *sbound; |
| 2588 | int keep_going = 1; |
| 2589 | |
| 2590 | if (ps->readin) continue; |
| 2591 | |
| 2592 | gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms; |
| 2593 | sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms; |
| 2594 | bound = gbound; |
| 2595 | |
| 2596 | /* Go through all of the symbols stored in a partial |
| 2597 | symtab in one loop. */ |
| 2598 | psym = objfile->global_psymbols.list + ps->globals_offset; |
| 2599 | while (keep_going) |
| 2600 | { |
| 2601 | if (psym >= bound) |
| 2602 | { |
| 2603 | if (bound == gbound && ps->n_static_syms != 0) |
| 2604 | { |
| 2605 | psym = objfile->static_psymbols.list + ps->statics_offset; |
| 2606 | bound = sbound; |
| 2607 | } |
| 2608 | else |
| 2609 | keep_going = 0; |
| 2610 | continue; |
| 2611 | } |
| 2612 | else |
| 2613 | { |
| 2614 | QUIT; |
| 2615 | |
| 2616 | /* If it would match (logic taken from loop below) |
| 2617 | load the file and go on to the next one */ |
| 2618 | if ((regexp == NULL || SYMBOL_MATCHES_REGEXP (psym)) |
| 2619 | && ((class == 0 && SYMBOL_CLASS (psym) != LOC_TYPEDEF |
| 2620 | && SYMBOL_CLASS (psym) != LOC_BLOCK) |
| 2621 | || (class == 1 && SYMBOL_CLASS (psym) == LOC_BLOCK) |
| 2622 | || (class == 2 && SYMBOL_CLASS (psym) == LOC_TYPEDEF) |
| 2623 | || (class == 3 && SYMBOL_CLASS (psym) == LOC_BLOCK))) |
| 2624 | { |
| 2625 | PSYMTAB_TO_SYMTAB(ps); |
| 2626 | keep_going = 0; |
| 2627 | } |
| 2628 | } |
| 2629 | psym++; |
| 2630 | } |
| 2631 | } |
| 2632 | |
| 2633 | /* Here, we search through the minimal symbol tables for functions that |
| 2634 | match, and call find_pc_symtab on them to force their symbols to |
| 2635 | be read. The symbol will then be found during the scan of symtabs |
| 2636 | below. If find_pc_symtab fails, set found_misc so that we will |
| 2637 | rescan to print any matching symbols without debug info. */ |
| 2638 | |
| 2639 | if (class == 1) |
| 2640 | { |
| 2641 | ALL_MSYMBOLS (objfile, msymbol) |
| 2642 | { |
| 2643 | if (MSYMBOL_TYPE (msymbol) == ourtype || |
| 2644 | MSYMBOL_TYPE (msymbol) == ourtype2) |
| 2645 | { |
| 2646 | if (regexp == NULL || SYMBOL_MATCHES_REGEXP (msymbol)) |
| 2647 | { |
| 2648 | if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))) |
| 2649 | { |
| 2650 | found_misc = 1; |
| 2651 | } |
| 2652 | } |
| 2653 | } |
| 2654 | } |
| 2655 | } |
| 2656 | |
| 2657 | /* Printout here so as to get after the "Reading in symbols" |
| 2658 | messages which will be generated above. */ |
| 2659 | if (!bpt) |
| 2660 | printf_filtered (regexp |
| 2661 | ? "All %ss matching regular expression \"%s\":\n" |
| 2662 | : "All defined %ss:\n", |
| 2663 | classnames[class], |
| 2664 | regexp); |
| 2665 | |
| 2666 | ALL_SYMTABS (objfile, s) |
| 2667 | { |
| 2668 | found_in_file = 0; |
| 2669 | bv = BLOCKVECTOR (s); |
| 2670 | /* Often many files share a blockvector. |
| 2671 | Scan each blockvector only once so that |
| 2672 | we don't get every symbol many times. |
| 2673 | It happens that the first symtab in the list |
| 2674 | for any given blockvector is the main file. */ |
| 2675 | if (bv != prev_bv) |
| 2676 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
| 2677 | { |
| 2678 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 2679 | /* Skip the sort if this block is always sorted. */ |
| 2680 | if (!BLOCK_SHOULD_SORT (b)) |
| 2681 | sort_block_syms (b); |
| 2682 | for (j = 0; j < BLOCK_NSYMS (b); j++) |
| 2683 | { |
| 2684 | QUIT; |
| 2685 | sym = BLOCK_SYM (b, j); |
| 2686 | if ((regexp == NULL || SYMBOL_MATCHES_REGEXP (sym)) |
| 2687 | && ((class == 0 && SYMBOL_CLASS (sym) != LOC_TYPEDEF |
| 2688 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
| 2689 | && SYMBOL_CLASS (sym) != LOC_CONST) |
| 2690 | || (class == 1 && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 2691 | || (class == 2 && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 2692 | || (class == 3 && SYMBOL_CLASS (sym) == LOC_BLOCK))) |
| 2693 | { |
| 2694 | if (bpt) |
| 2695 | { |
| 2696 | /* Set a breakpoint here, if it's a function */ |
| 2697 | if (class == 1) |
| 2698 | { |
| 2699 | /* There may be more than one function with the |
| 2700 | same name but in different files. In order to |
| 2701 | set breakpoints on all of them, we must give |
| 2702 | both the file name and the function name to |
| 2703 | break_command. */ |
| 2704 | char *string = |
| 2705 | (char *) alloca (strlen (s->filename) |
| 2706 | + strlen (SYMBOL_NAME(sym)) |
| 2707 | + 2); |
| 2708 | strcpy (string, s->filename); |
| 2709 | strcat (string, ":"); |
| 2710 | strcat (string, SYMBOL_NAME(sym)); |
| 2711 | break_command (string, 0); |
| 2712 | } |
| 2713 | } |
| 2714 | else if (!found_in_file) |
| 2715 | { |
| 2716 | fputs_filtered ("\nFile ", gdb_stdout); |
| 2717 | fputs_filtered (s->filename, gdb_stdout); |
| 2718 | fputs_filtered (":\n", gdb_stdout); |
| 2719 | } |
| 2720 | found_in_file = 1; |
| 2721 | |
| 2722 | if (class != 2 && i == STATIC_BLOCK) |
| 2723 | printf_filtered ("static "); |
| 2724 | |
| 2725 | /* Typedef that is not a C++ class */ |
| 2726 | if (class == 2 |
| 2727 | && SYMBOL_NAMESPACE (sym) != STRUCT_NAMESPACE) |
| 2728 | c_typedef_print (SYMBOL_TYPE(sym), sym, gdb_stdout); |
| 2729 | /* variable, func, or typedef-that-is-c++-class */ |
| 2730 | else if (class < 2 || |
| 2731 | (class == 2 && |
| 2732 | SYMBOL_NAMESPACE(sym) == STRUCT_NAMESPACE)) |
| 2733 | { |
| 2734 | type_print (SYMBOL_TYPE (sym), |
| 2735 | (SYMBOL_CLASS (sym) == LOC_TYPEDEF |
| 2736 | ? "" : SYMBOL_SOURCE_NAME (sym)), |
| 2737 | gdb_stdout, 0); |
| 2738 | |
| 2739 | printf_filtered (";\n"); |
| 2740 | } |
| 2741 | else |
| 2742 | { |
| 2743 | # if 0 /* FIXME, why is this zapped out? */ |
| 2744 | char buf[1024]; |
| 2745 | c_type_print_base (TYPE_FN_FIELD_TYPE(t, i), |
| 2746 | gdb_stdout, 0, 0); |
| 2747 | c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE(t, i), |
| 2748 | gdb_stdout, 0); |
| 2749 | sprintf (buf, " %s::", type_name_no_tag (t)); |
| 2750 | cp_type_print_method_args (TYPE_FN_FIELD_ARGS (t, i), |
| 2751 | buf, name, gdb_stdout); |
| 2752 | # endif |
| 2753 | } |
| 2754 | } |
| 2755 | } |
| 2756 | } |
| 2757 | prev_bv = bv; |
| 2758 | } |
| 2759 | |
| 2760 | /* If there are no eyes, avoid all contact. I mean, if there are |
| 2761 | no debug symbols, then print directly from the msymbol_vector. */ |
| 2762 | |
| 2763 | if (found_misc || class != 1) |
| 2764 | { |
| 2765 | found_in_file = 0; |
| 2766 | ALL_MSYMBOLS (objfile, msymbol) |
| 2767 | { |
| 2768 | if (MSYMBOL_TYPE (msymbol) == ourtype || |
| 2769 | MSYMBOL_TYPE (msymbol) == ourtype2) |
| 2770 | { |
| 2771 | if (regexp == NULL || SYMBOL_MATCHES_REGEXP (msymbol)) |
| 2772 | { |
| 2773 | /* Functions: Look up by address. */ |
| 2774 | if (class != 1 || |
| 2775 | (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))) |
| 2776 | { |
| 2777 | /* Variables/Absolutes: Look up by name */ |
| 2778 | if (lookup_symbol (SYMBOL_NAME (msymbol), |
| 2779 | (struct block *) NULL, VAR_NAMESPACE, |
| 2780 | 0, (struct symtab **) NULL) == NULL) |
| 2781 | { |
| 2782 | if (!found_in_file) |
| 2783 | { |
| 2784 | printf_filtered ("\nNon-debugging symbols:\n"); |
| 2785 | found_in_file = 1; |
| 2786 | } |
| 2787 | printf_filtered (" %08lx %s\n", |
| 2788 | (unsigned long) SYMBOL_VALUE_ADDRESS (msymbol), |
| 2789 | SYMBOL_SOURCE_NAME (msymbol)); |
| 2790 | } |
| 2791 | } |
| 2792 | } |
| 2793 | } |
| 2794 | } |
| 2795 | } |
| 2796 | } |
| 2797 | |
| 2798 | static void |
| 2799 | variables_info (regexp, from_tty) |
| 2800 | char *regexp; |
| 2801 | int from_tty; |
| 2802 | { |
| 2803 | list_symbols (regexp, 0, 0); |
| 2804 | } |
| 2805 | |
| 2806 | static void |
| 2807 | functions_info (regexp, from_tty) |
| 2808 | char *regexp; |
| 2809 | int from_tty; |
| 2810 | { |
| 2811 | list_symbols (regexp, 1, 0); |
| 2812 | } |
| 2813 | |
| 2814 | static void |
| 2815 | types_info (regexp, from_tty) |
| 2816 | char *regexp; |
| 2817 | int from_tty; |
| 2818 | { |
| 2819 | list_symbols (regexp, 2, 0); |
| 2820 | } |
| 2821 | |
| 2822 | #if 0 |
| 2823 | /* Tiemann says: "info methods was never implemented." */ |
| 2824 | static void |
| 2825 | methods_info (regexp) |
| 2826 | char *regexp; |
| 2827 | { |
| 2828 | list_symbols (regexp, 3, 0); |
| 2829 | } |
| 2830 | #endif /* 0 */ |
| 2831 | |
| 2832 | /* Breakpoint all functions matching regular expression. */ |
| 2833 | static void |
| 2834 | rbreak_command (regexp, from_tty) |
| 2835 | char *regexp; |
| 2836 | int from_tty; |
| 2837 | { |
| 2838 | list_symbols (regexp, 1, 1); |
| 2839 | } |
| 2840 | \f |
| 2841 | |
| 2842 | /* Return Nonzero if block a is lexically nested within block b, |
| 2843 | or if a and b have the same pc range. |
| 2844 | Return zero otherwise. */ |
| 2845 | int |
| 2846 | contained_in (a, b) |
| 2847 | struct block *a, *b; |
| 2848 | { |
| 2849 | if (!a || !b) |
| 2850 | return 0; |
| 2851 | return BLOCK_START (a) >= BLOCK_START (b) |
| 2852 | && BLOCK_END (a) <= BLOCK_END (b); |
| 2853 | } |
| 2854 | |
| 2855 | \f |
| 2856 | /* Helper routine for make_symbol_completion_list. */ |
| 2857 | |
| 2858 | static int return_val_size; |
| 2859 | static int return_val_index; |
| 2860 | static char **return_val; |
| 2861 | |
| 2862 | #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \ |
| 2863 | do { \ |
| 2864 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) \ |
| 2865 | /* Put only the mangled name on the list. */ \ |
| 2866 | /* Advantage: "b foo<TAB>" completes to "b foo(int, int)" */ \ |
| 2867 | /* Disadvantage: "b foo__i<TAB>" doesn't complete. */ \ |
| 2868 | completion_list_add_name \ |
| 2869 | (SYMBOL_DEMANGLED_NAME (symbol), (sym_text), (len), (text), (word)); \ |
| 2870 | else \ |
| 2871 | completion_list_add_name \ |
| 2872 | (SYMBOL_NAME (symbol), (sym_text), (len), (text), (word)); \ |
| 2873 | } while (0) |
| 2874 | |
| 2875 | /* Test to see if the symbol specified by SYMNAME (which is already |
| 2876 | demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN |
| 2877 | characters. If so, add it to the current completion list. */ |
| 2878 | |
| 2879 | static void |
| 2880 | completion_list_add_name (symname, sym_text, sym_text_len, text, word) |
| 2881 | char *symname; |
| 2882 | char *sym_text; |
| 2883 | int sym_text_len; |
| 2884 | char *text; |
| 2885 | char *word; |
| 2886 | { |
| 2887 | int newsize; |
| 2888 | int i; |
| 2889 | |
| 2890 | /* clip symbols that cannot match */ |
| 2891 | |
| 2892 | if (strncmp (symname, sym_text, sym_text_len) != 0) |
| 2893 | { |
| 2894 | return; |
| 2895 | } |
| 2896 | |
| 2897 | /* Clip any symbol names that we've already considered. (This is a |
| 2898 | time optimization) */ |
| 2899 | |
| 2900 | for (i = 0; i < return_val_index; ++i) |
| 2901 | { |
| 2902 | if (STREQ (symname, return_val[i])) |
| 2903 | { |
| 2904 | return; |
| 2905 | } |
| 2906 | } |
| 2907 | |
| 2908 | /* We have a match for a completion, so add SYMNAME to the current list |
| 2909 | of matches. Note that the name is moved to freshly malloc'd space. */ |
| 2910 | |
| 2911 | { |
| 2912 | char *new; |
| 2913 | if (word == sym_text) |
| 2914 | { |
| 2915 | new = xmalloc (strlen (symname) + 5); |
| 2916 | strcpy (new, symname); |
| 2917 | } |
| 2918 | else if (word > sym_text) |
| 2919 | { |
| 2920 | /* Return some portion of symname. */ |
| 2921 | new = xmalloc (strlen (symname) + 5); |
| 2922 | strcpy (new, symname + (word - sym_text)); |
| 2923 | } |
| 2924 | else |
| 2925 | { |
| 2926 | /* Return some of SYM_TEXT plus symname. */ |
| 2927 | new = xmalloc (strlen (symname) + (sym_text - word) + 5); |
| 2928 | strncpy (new, word, sym_text - word); |
| 2929 | new[sym_text - word] = '\0'; |
| 2930 | strcat (new, symname); |
| 2931 | } |
| 2932 | |
| 2933 | if (return_val_index + 3 > return_val_size) |
| 2934 | { |
| 2935 | newsize = (return_val_size *= 2) * sizeof (char *); |
| 2936 | return_val = (char **) xrealloc ((char *) return_val, newsize); |
| 2937 | } |
| 2938 | return_val[return_val_index++] = new; |
| 2939 | return_val[return_val_index] = NULL; |
| 2940 | } |
| 2941 | } |
| 2942 | |
| 2943 | /* Return a NULL terminated array of all symbols (regardless of class) which |
| 2944 | begin by matching TEXT. If the answer is no symbols, then the return value |
| 2945 | is an array which contains only a NULL pointer. |
| 2946 | |
| 2947 | Problem: All of the symbols have to be copied because readline frees them. |
| 2948 | I'm not going to worry about this; hopefully there won't be that many. */ |
| 2949 | |
| 2950 | char ** |
| 2951 | make_symbol_completion_list (text, word) |
| 2952 | char *text; |
| 2953 | char *word; |
| 2954 | { |
| 2955 | register struct symbol *sym; |
| 2956 | register struct symtab *s; |
| 2957 | register struct partial_symtab *ps; |
| 2958 | register struct minimal_symbol *msymbol; |
| 2959 | register struct objfile *objfile; |
| 2960 | register struct block *b, *surrounding_static_block = 0; |
| 2961 | register int i, j; |
| 2962 | struct partial_symbol *psym; |
| 2963 | /* The symbol we are completing on. Points in same buffer as text. */ |
| 2964 | char *sym_text; |
| 2965 | /* Length of sym_text. */ |
| 2966 | int sym_text_len; |
| 2967 | |
| 2968 | /* Now look for the symbol we are supposed to complete on. |
| 2969 | FIXME: This should be language-specific. */ |
| 2970 | { |
| 2971 | char *p; |
| 2972 | char quote_found; |
| 2973 | char *quote_pos = NULL; |
| 2974 | |
| 2975 | /* First see if this is a quoted string. */ |
| 2976 | quote_found = '\0'; |
| 2977 | for (p = text; *p != '\0'; ++p) |
| 2978 | { |
| 2979 | if (quote_found != '\0') |
| 2980 | { |
| 2981 | if (*p == quote_found) |
| 2982 | /* Found close quote. */ |
| 2983 | quote_found = '\0'; |
| 2984 | else if (*p == '\\' && p[1] == quote_found) |
| 2985 | /* A backslash followed by the quote character |
| 2986 | doesn't end the string. */ |
| 2987 | ++p; |
| 2988 | } |
| 2989 | else if (*p == '\'' || *p == '"') |
| 2990 | { |
| 2991 | quote_found = *p; |
| 2992 | quote_pos = p; |
| 2993 | } |
| 2994 | } |
| 2995 | if (quote_found == '\'') |
| 2996 | /* A string within single quotes can be a symbol, so complete on it. */ |
| 2997 | sym_text = quote_pos + 1; |
| 2998 | else if (quote_found == '"') |
| 2999 | /* A double-quoted string is never a symbol, nor does it make sense |
| 3000 | to complete it any other way. */ |
| 3001 | return NULL; |
| 3002 | else |
| 3003 | { |
| 3004 | /* It is not a quoted string. Break it based on the characters |
| 3005 | which are in symbols. */ |
| 3006 | while (p > text) |
| 3007 | { |
| 3008 | if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0') |
| 3009 | --p; |
| 3010 | else |
| 3011 | break; |
| 3012 | } |
| 3013 | sym_text = p; |
| 3014 | } |
| 3015 | } |
| 3016 | |
| 3017 | sym_text_len = strlen (sym_text); |
| 3018 | |
| 3019 | return_val_size = 100; |
| 3020 | return_val_index = 0; |
| 3021 | return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *)); |
| 3022 | return_val[0] = NULL; |
| 3023 | |
| 3024 | /* Look through the partial symtabs for all symbols which begin |
| 3025 | by matching SYM_TEXT. Add each one that you find to the list. */ |
| 3026 | |
| 3027 | ALL_PSYMTABS (objfile, ps) |
| 3028 | { |
| 3029 | /* If the psymtab's been read in we'll get it when we search |
| 3030 | through the blockvector. */ |
| 3031 | if (ps->readin) continue; |
| 3032 | |
| 3033 | for (psym = objfile->global_psymbols.list + ps->globals_offset; |
| 3034 | psym < (objfile->global_psymbols.list + ps->globals_offset |
| 3035 | + ps->n_global_syms); |
| 3036 | psym++) |
| 3037 | { |
| 3038 | /* If interrupted, then quit. */ |
| 3039 | QUIT; |
| 3040 | COMPLETION_LIST_ADD_SYMBOL (psym, sym_text, sym_text_len, text, word); |
| 3041 | } |
| 3042 | |
| 3043 | for (psym = objfile->static_psymbols.list + ps->statics_offset; |
| 3044 | psym < (objfile->static_psymbols.list + ps->statics_offset |
| 3045 | + ps->n_static_syms); |
| 3046 | psym++) |
| 3047 | { |
| 3048 | QUIT; |
| 3049 | COMPLETION_LIST_ADD_SYMBOL (psym, sym_text, sym_text_len, text, word); |
| 3050 | } |
| 3051 | } |
| 3052 | |
| 3053 | /* At this point scan through the misc symbol vectors and add each |
| 3054 | symbol you find to the list. Eventually we want to ignore |
| 3055 | anything that isn't a text symbol (everything else will be |
| 3056 | handled by the psymtab code above). */ |
| 3057 | |
| 3058 | ALL_MSYMBOLS (objfile, msymbol) |
| 3059 | { |
| 3060 | QUIT; |
| 3061 | COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word); |
| 3062 | } |
| 3063 | |
| 3064 | /* Search upwards from currently selected frame (so that we can |
| 3065 | complete on local vars. */ |
| 3066 | |
| 3067 | for (b = get_selected_block (); b != NULL; b = BLOCK_SUPERBLOCK (b)) |
| 3068 | { |
| 3069 | if (!BLOCK_SUPERBLOCK (b)) |
| 3070 | { |
| 3071 | surrounding_static_block = b; /* For elmin of dups */ |
| 3072 | } |
| 3073 | |
| 3074 | /* Also catch fields of types defined in this places which match our |
| 3075 | text string. Only complete on types visible from current context. */ |
| 3076 | |
| 3077 | for (i = 0; i < BLOCK_NSYMS (b); i++) |
| 3078 | { |
| 3079 | sym = BLOCK_SYM (b, i); |
| 3080 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 3081 | if (SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 3082 | { |
| 3083 | struct type *t = SYMBOL_TYPE (sym); |
| 3084 | enum type_code c = TYPE_CODE (t); |
| 3085 | |
| 3086 | if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT) |
| 3087 | { |
| 3088 | for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++) |
| 3089 | { |
| 3090 | if (TYPE_FIELD_NAME (t, j)) |
| 3091 | { |
| 3092 | completion_list_add_name (TYPE_FIELD_NAME (t, j), |
| 3093 | sym_text, sym_text_len, text, word); |
| 3094 | } |
| 3095 | } |
| 3096 | } |
| 3097 | } |
| 3098 | } |
| 3099 | } |
| 3100 | |
| 3101 | /* Go through the symtabs and check the externs and statics for |
| 3102 | symbols which match. */ |
| 3103 | |
| 3104 | ALL_SYMTABS (objfile, s) |
| 3105 | { |
| 3106 | QUIT; |
| 3107 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK); |
| 3108 | for (i = 0; i < BLOCK_NSYMS (b); i++) |
| 3109 | { |
| 3110 | sym = BLOCK_SYM (b, i); |
| 3111 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 3112 | } |
| 3113 | } |
| 3114 | |
| 3115 | ALL_SYMTABS (objfile, s) |
| 3116 | { |
| 3117 | QUIT; |
| 3118 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
| 3119 | /* Don't do this block twice. */ |
| 3120 | if (b == surrounding_static_block) continue; |
| 3121 | for (i = 0; i < BLOCK_NSYMS (b); i++) |
| 3122 | { |
| 3123 | sym = BLOCK_SYM (b, i); |
| 3124 | COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word); |
| 3125 | } |
| 3126 | } |
| 3127 | |
| 3128 | return (return_val); |
| 3129 | } |
| 3130 | |
| 3131 | \f |
| 3132 | #if 0 |
| 3133 | /* Add the type of the symbol sym to the type of the current |
| 3134 | function whose block we are in (assumed). The type of |
| 3135 | this current function is contained in *TYPE. |
| 3136 | |
| 3137 | This basically works as follows: When we find a function |
| 3138 | symbol (N_FUNC with a 'f' or 'F' in the symbol name), we record |
| 3139 | a pointer to its type in the global in_function_type. Every |
| 3140 | time we come across a parameter symbol ('p' in its name), then |
| 3141 | this procedure adds the name and type of that parameter |
| 3142 | to the function type pointed to by *TYPE. (Which should correspond |
| 3143 | to in_function_type if it was called correctly). |
| 3144 | |
| 3145 | Note that since we are modifying a type, the result of |
| 3146 | lookup_function_type() should be memcpy()ed before calling |
| 3147 | this. When not in strict typing mode, the expression |
| 3148 | evaluator can choose to ignore this. |
| 3149 | |
| 3150 | Assumption: All of a function's parameter symbols will |
| 3151 | appear before another function symbol is found. The parameters |
| 3152 | appear in the same order in the argument list as they do in the |
| 3153 | symbol table. */ |
| 3154 | |
| 3155 | void |
| 3156 | add_param_to_type (type,sym) |
| 3157 | struct type **type; |
| 3158 | struct symbol *sym; |
| 3159 | { |
| 3160 | int num = ++(TYPE_NFIELDS(*type)); |
| 3161 | |
| 3162 | if(TYPE_NFIELDS(*type)-1) |
| 3163 | TYPE_FIELDS(*type) = (struct field *) |
| 3164 | (*current_objfile->xrealloc) ((char *)(TYPE_FIELDS(*type)), |
| 3165 | num*sizeof(struct field)); |
| 3166 | else |
| 3167 | TYPE_FIELDS(*type) = (struct field *) |
| 3168 | (*current_objfile->xmalloc) (num*sizeof(struct field)); |
| 3169 | |
| 3170 | TYPE_FIELD_BITPOS(*type,num-1) = num-1; |
| 3171 | TYPE_FIELD_BITSIZE(*type,num-1) = 0; |
| 3172 | TYPE_FIELD_TYPE(*type,num-1) = SYMBOL_TYPE(sym); |
| 3173 | TYPE_FIELD_NAME(*type,num-1) = SYMBOL_NAME(sym); |
| 3174 | } |
| 3175 | #endif |
| 3176 | \f |
| 3177 | void |
| 3178 | _initialize_symtab () |
| 3179 | { |
| 3180 | add_info ("variables", variables_info, |
| 3181 | "All global and static variable names, or those matching REGEXP."); |
| 3182 | add_info ("functions", functions_info, |
| 3183 | "All function names, or those matching REGEXP."); |
| 3184 | |
| 3185 | /* FIXME: This command has at least the following problems: |
| 3186 | 1. It prints builtin types (in a very strange and confusing fashion). |
| 3187 | 2. It doesn't print right, e.g. with |
| 3188 | typedef struct foo *FOO |
| 3189 | type_print prints "FOO" when we want to make it (in this situation) |
| 3190 | print "struct foo *". |
| 3191 | I also think "ptype" or "whatis" is more likely to be useful (but if |
| 3192 | there is much disagreement "info types" can be fixed). */ |
| 3193 | add_info ("types", types_info, |
| 3194 | "All type names, or those matching REGEXP."); |
| 3195 | |
| 3196 | #if 0 |
| 3197 | add_info ("methods", methods_info, |
| 3198 | "All method names, or those matching REGEXP::REGEXP.\n\ |
| 3199 | If the class qualifier is omitted, it is assumed to be the current scope.\n\ |
| 3200 | If the first REGEXP is omitted, then all methods matching the second REGEXP\n\ |
| 3201 | are listed."); |
| 3202 | #endif |
| 3203 | add_info ("sources", sources_info, |
| 3204 | "Source files in the program."); |
| 3205 | |
| 3206 | add_com ("rbreak", no_class, rbreak_command, |
| 3207 | "Set a breakpoint for all functions matching REGEXP."); |
| 3208 | |
| 3209 | /* Initialize the one built-in type that isn't language dependent... */ |
| 3210 | builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0, |
| 3211 | "<unknown type>", (struct objfile *) NULL); |
| 3212 | } |