| 1 | /* Parser for linespec for the GNU debugger, GDB. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 3 | 1996, 1997, 1998, 1999, 2000, 2001 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "symtab.h" |
| 25 | #include "frame.h" |
| 26 | #include "command.h" |
| 27 | #include "symfile.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "demangle.h" |
| 30 | #include "value.h" |
| 31 | #include "completer.h" |
| 32 | #include "cp-abi.h" |
| 33 | |
| 34 | /* Prototype for one function in parser-defs.h, |
| 35 | instead of including that entire file. */ |
| 36 | |
| 37 | extern char *find_template_name_end (char *); |
| 38 | |
| 39 | /* We share this one with symtab.c, but it is not exported widely. */ |
| 40 | |
| 41 | extern char *operator_chars (char *, char **); |
| 42 | |
| 43 | /* Prototypes for local functions */ |
| 44 | |
| 45 | static void cplusplus_error (const char *name, const char *fmt, ...) ATTR_FORMAT (printf, 2, 3); |
| 46 | |
| 47 | static int total_number_of_methods (struct type *type); |
| 48 | |
| 49 | static int find_methods (struct type *, char *, struct symbol **); |
| 50 | |
| 51 | static void build_canonical_line_spec (struct symtab_and_line *, |
| 52 | char *, char ***); |
| 53 | |
| 54 | static char *find_toplevel_char (char *s, char c); |
| 55 | |
| 56 | static struct symtabs_and_lines decode_line_2 (struct symbol *[], |
| 57 | int, int, char ***); |
| 58 | |
| 59 | /* Helper functions. */ |
| 60 | |
| 61 | /* Issue a helpful hint on using the command completion feature on |
| 62 | single quoted demangled C++ symbols as part of the completion |
| 63 | error. */ |
| 64 | |
| 65 | static void |
| 66 | cplusplus_error (const char *name, const char *fmt, ...) |
| 67 | { |
| 68 | struct ui_file *tmp_stream; |
| 69 | tmp_stream = mem_fileopen (); |
| 70 | make_cleanup_ui_file_delete (tmp_stream); |
| 71 | |
| 72 | { |
| 73 | va_list args; |
| 74 | va_start (args, fmt); |
| 75 | vfprintf_unfiltered (tmp_stream, fmt, args); |
| 76 | va_end (args); |
| 77 | } |
| 78 | |
| 79 | while (*name == '\'') |
| 80 | name++; |
| 81 | fprintf_unfiltered (tmp_stream, |
| 82 | ("Hint: try '%s<TAB> or '%s<ESC-?>\n" |
| 83 | "(Note leading single quote.)"), |
| 84 | name, name); |
| 85 | error_stream (tmp_stream); |
| 86 | } |
| 87 | |
| 88 | /* Return the number of methods described for TYPE, including the |
| 89 | methods from types it derives from. This can't be done in the symbol |
| 90 | reader because the type of the baseclass might still be stubbed |
| 91 | when the definition of the derived class is parsed. */ |
| 92 | |
| 93 | static int |
| 94 | total_number_of_methods (struct type *type) |
| 95 | { |
| 96 | int n; |
| 97 | int count; |
| 98 | |
| 99 | CHECK_TYPEDEF (type); |
| 100 | if (TYPE_CPLUS_SPECIFIC (type) == NULL) |
| 101 | return 0; |
| 102 | count = TYPE_NFN_FIELDS_TOTAL (type); |
| 103 | |
| 104 | for (n = 0; n < TYPE_N_BASECLASSES (type); n++) |
| 105 | count += total_number_of_methods (TYPE_BASECLASS (type, n)); |
| 106 | |
| 107 | return count; |
| 108 | } |
| 109 | |
| 110 | /* Recursive helper function for decode_line_1. |
| 111 | Look for methods named NAME in type T. |
| 112 | Return number of matches. |
| 113 | Put matches in SYM_ARR, which should have been allocated with |
| 114 | a size of total_number_of_methods (T) * sizeof (struct symbol *). |
| 115 | Note that this function is g++ specific. */ |
| 116 | |
| 117 | static int |
| 118 | find_methods (struct type *t, char *name, struct symbol **sym_arr) |
| 119 | { |
| 120 | int i1 = 0; |
| 121 | int ibase; |
| 122 | char *class_name = type_name_no_tag (t); |
| 123 | |
| 124 | /* Ignore this class if it doesn't have a name. This is ugly, but |
| 125 | unless we figure out how to get the physname without the name of |
| 126 | the class, then the loop can't do any good. */ |
| 127 | if (class_name |
| 128 | && (lookup_symbol (class_name, (struct block *) NULL, |
| 129 | STRUCT_NAMESPACE, (int *) NULL, |
| 130 | (struct symtab **) NULL))) |
| 131 | { |
| 132 | int method_counter; |
| 133 | int name_len = strlen (name); |
| 134 | |
| 135 | CHECK_TYPEDEF (t); |
| 136 | |
| 137 | /* Loop over each method name. At this level, all overloads of a name |
| 138 | are counted as a single name. There is an inner loop which loops over |
| 139 | each overload. */ |
| 140 | |
| 141 | for (method_counter = TYPE_NFN_FIELDS (t) - 1; |
| 142 | method_counter >= 0; |
| 143 | --method_counter) |
| 144 | { |
| 145 | int field_counter; |
| 146 | char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter); |
| 147 | char dem_opname[64]; |
| 148 | |
| 149 | if (strncmp (method_name, "__", 2) == 0 || |
| 150 | strncmp (method_name, "op", 2) == 0 || |
| 151 | strncmp (method_name, "type", 4) == 0) |
| 152 | { |
| 153 | if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI)) |
| 154 | method_name = dem_opname; |
| 155 | else if (cplus_demangle_opname (method_name, dem_opname, 0)) |
| 156 | method_name = dem_opname; |
| 157 | } |
| 158 | |
| 159 | if (strcmp_iw (name, method_name) == 0) |
| 160 | /* Find all the overloaded methods with that name. */ |
| 161 | for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| 162 | field_counter >= 0; |
| 163 | --field_counter) |
| 164 | { |
| 165 | struct fn_field *f; |
| 166 | char *phys_name; |
| 167 | |
| 168 | f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| 169 | |
| 170 | if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| 171 | { |
| 172 | char *tmp_name; |
| 173 | |
| 174 | tmp_name = gdb_mangle_name (t, |
| 175 | method_counter, |
| 176 | field_counter); |
| 177 | phys_name = alloca (strlen (tmp_name) + 1); |
| 178 | strcpy (phys_name, tmp_name); |
| 179 | xfree (tmp_name); |
| 180 | } |
| 181 | else |
| 182 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| 183 | |
| 184 | /* Destructor is handled by caller, dont add it to the list */ |
| 185 | if (is_destructor_name (phys_name) != 0) |
| 186 | continue; |
| 187 | |
| 188 | sym_arr[i1] = lookup_symbol (phys_name, |
| 189 | NULL, VAR_NAMESPACE, |
| 190 | (int *) NULL, |
| 191 | (struct symtab **) NULL); |
| 192 | if (sym_arr[i1]) |
| 193 | i1++; |
| 194 | else |
| 195 | { |
| 196 | /* This error message gets printed, but the method |
| 197 | still seems to be found |
| 198 | fputs_filtered("(Cannot find method ", gdb_stdout); |
| 199 | fprintf_symbol_filtered (gdb_stdout, phys_name, |
| 200 | language_cplus, |
| 201 | DMGL_PARAMS | DMGL_ANSI); |
| 202 | fputs_filtered(" - possibly inlined.)\n", gdb_stdout); |
| 203 | */ |
| 204 | } |
| 205 | } |
| 206 | else if (strncmp (class_name, name, name_len) == 0 |
| 207 | && (class_name[name_len] == '\0' |
| 208 | || class_name[name_len] == '<')) |
| 209 | { |
| 210 | /* For GCC 3.x and stabs, constructors and destructors have names |
| 211 | like __base_ctor and __complete_dtor. Check the physname for now |
| 212 | if we're looking for a constructor. */ |
| 213 | for (field_counter |
| 214 | = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| 215 | field_counter >= 0; |
| 216 | --field_counter) |
| 217 | { |
| 218 | struct fn_field *f; |
| 219 | char *phys_name; |
| 220 | |
| 221 | f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| 222 | |
| 223 | /* GCC 3.x will never produce stabs stub methods, so we don't need |
| 224 | to handle this case. */ |
| 225 | if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| 226 | continue; |
| 227 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| 228 | if (! is_constructor_name (phys_name)) |
| 229 | continue; |
| 230 | |
| 231 | /* If this method is actually defined, include it in the |
| 232 | list. */ |
| 233 | sym_arr[i1] = lookup_symbol (phys_name, |
| 234 | NULL, VAR_NAMESPACE, |
| 235 | (int *) NULL, |
| 236 | (struct symtab **) NULL); |
| 237 | if (sym_arr[i1]) |
| 238 | i1++; |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* Only search baseclasses if there is no match yet, since names in |
| 245 | derived classes override those in baseclasses. |
| 246 | |
| 247 | FIXME: The above is not true; it is only true of member functions |
| 248 | if they have the same number of arguments (??? - section 13.1 of the |
| 249 | ARM says the function members are not in the same scope but doesn't |
| 250 | really spell out the rules in a way I understand. In any case, if |
| 251 | the number of arguments differ this is a case in which we can overload |
| 252 | rather than hiding without any problem, and gcc 2.4.5 does overload |
| 253 | rather than hiding in this case). */ |
| 254 | |
| 255 | if (i1 == 0) |
| 256 | for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++) |
| 257 | i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1); |
| 258 | |
| 259 | return i1; |
| 260 | } |
| 261 | |
| 262 | /* Helper function for decode_line_1. |
| 263 | Build a canonical line spec in CANONICAL if it is non-NULL and if |
| 264 | the SAL has a symtab. |
| 265 | If SYMNAME is non-NULL the canonical line spec is `filename:symname'. |
| 266 | If SYMNAME is NULL the line number from SAL is used and the canonical |
| 267 | line spec is `filename:linenum'. */ |
| 268 | |
| 269 | static void |
| 270 | build_canonical_line_spec (struct symtab_and_line *sal, char *symname, |
| 271 | char ***canonical) |
| 272 | { |
| 273 | char **canonical_arr; |
| 274 | char *canonical_name; |
| 275 | char *filename; |
| 276 | struct symtab *s = sal->symtab; |
| 277 | |
| 278 | if (s == (struct symtab *) NULL |
| 279 | || s->filename == (char *) NULL |
| 280 | || canonical == (char ***) NULL) |
| 281 | return; |
| 282 | |
| 283 | canonical_arr = (char **) xmalloc (sizeof (char *)); |
| 284 | *canonical = canonical_arr; |
| 285 | |
| 286 | filename = s->filename; |
| 287 | if (symname != NULL) |
| 288 | { |
| 289 | canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2); |
| 290 | sprintf (canonical_name, "%s:%s", filename, symname); |
| 291 | } |
| 292 | else |
| 293 | { |
| 294 | canonical_name = xmalloc (strlen (filename) + 30); |
| 295 | sprintf (canonical_name, "%s:%d", filename, sal->line); |
| 296 | } |
| 297 | canonical_arr[0] = canonical_name; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | |
| 302 | /* Find an instance of the character C in the string S that is outside |
| 303 | of all parenthesis pairs, single-quoted strings, and double-quoted |
| 304 | strings. Also, ignore the char within a template name, like a ',' |
| 305 | within foo<int, int>. */ |
| 306 | |
| 307 | static char * |
| 308 | find_toplevel_char (char *s, char c) |
| 309 | { |
| 310 | int quoted = 0; /* zero if we're not in quotes; |
| 311 | '"' if we're in a double-quoted string; |
| 312 | '\'' if we're in a single-quoted string. */ |
| 313 | int depth = 0; /* number of unclosed parens we've seen */ |
| 314 | char *scan; |
| 315 | |
| 316 | for (scan = s; *scan; scan++) |
| 317 | { |
| 318 | if (quoted) |
| 319 | { |
| 320 | if (*scan == quoted) |
| 321 | quoted = 0; |
| 322 | else if (*scan == '\\' && *(scan + 1)) |
| 323 | scan++; |
| 324 | } |
| 325 | else if (*scan == c && ! quoted && depth == 0) |
| 326 | return scan; |
| 327 | else if (*scan == '"' || *scan == '\'') |
| 328 | quoted = *scan; |
| 329 | else if (*scan == '(' || *scan == '<') |
| 330 | depth++; |
| 331 | else if ((*scan == ')' || *scan == '>') && depth > 0) |
| 332 | depth--; |
| 333 | } |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to |
| 339 | operate on (ask user if necessary). |
| 340 | If CANONICAL is non-NULL return a corresponding array of mangled names |
| 341 | as canonical line specs there. */ |
| 342 | |
| 343 | static struct symtabs_and_lines |
| 344 | decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline, |
| 345 | char ***canonical) |
| 346 | { |
| 347 | struct symtabs_and_lines values, return_values; |
| 348 | char *args, *arg1; |
| 349 | int i; |
| 350 | char *prompt; |
| 351 | char *symname; |
| 352 | struct cleanup *old_chain; |
| 353 | char **canonical_arr = (char **) NULL; |
| 354 | |
| 355 | values.sals = (struct symtab_and_line *) |
| 356 | alloca (nelts * sizeof (struct symtab_and_line)); |
| 357 | return_values.sals = (struct symtab_and_line *) |
| 358 | xmalloc (nelts * sizeof (struct symtab_and_line)); |
| 359 | old_chain = make_cleanup (xfree, return_values.sals); |
| 360 | |
| 361 | if (canonical) |
| 362 | { |
| 363 | canonical_arr = (char **) xmalloc (nelts * sizeof (char *)); |
| 364 | make_cleanup (xfree, canonical_arr); |
| 365 | memset (canonical_arr, 0, nelts * sizeof (char *)); |
| 366 | *canonical = canonical_arr; |
| 367 | } |
| 368 | |
| 369 | i = 0; |
| 370 | printf_unfiltered ("[0] cancel\n[1] all\n"); |
| 371 | while (i < nelts) |
| 372 | { |
| 373 | INIT_SAL (&return_values.sals[i]); /* initialize to zeroes */ |
| 374 | INIT_SAL (&values.sals[i]); |
| 375 | if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) |
| 376 | { |
| 377 | values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline); |
| 378 | printf_unfiltered ("[%d] %s at %s:%d\n", |
| 379 | (i + 2), |
| 380 | SYMBOL_SOURCE_NAME (sym_arr[i]), |
| 381 | values.sals[i].symtab->filename, |
| 382 | values.sals[i].line); |
| 383 | } |
| 384 | else |
| 385 | printf_unfiltered ("?HERE\n"); |
| 386 | i++; |
| 387 | } |
| 388 | |
| 389 | if ((prompt = getenv ("PS2")) == NULL) |
| 390 | { |
| 391 | prompt = "> "; |
| 392 | } |
| 393 | args = command_line_input (prompt, 0, "overload-choice"); |
| 394 | |
| 395 | if (args == 0 || *args == 0) |
| 396 | error_no_arg ("one or more choice numbers"); |
| 397 | |
| 398 | i = 0; |
| 399 | while (*args) |
| 400 | { |
| 401 | int num; |
| 402 | |
| 403 | arg1 = args; |
| 404 | while (*arg1 >= '0' && *arg1 <= '9') |
| 405 | arg1++; |
| 406 | if (*arg1 && *arg1 != ' ' && *arg1 != '\t') |
| 407 | error ("Arguments must be choice numbers."); |
| 408 | |
| 409 | num = atoi (args); |
| 410 | |
| 411 | if (num == 0) |
| 412 | error ("canceled"); |
| 413 | else if (num == 1) |
| 414 | { |
| 415 | if (canonical_arr) |
| 416 | { |
| 417 | for (i = 0; i < nelts; i++) |
| 418 | { |
| 419 | if (canonical_arr[i] == NULL) |
| 420 | { |
| 421 | symname = SYMBOL_NAME (sym_arr[i]); |
| 422 | canonical_arr[i] = savestring (symname, strlen (symname)); |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | memcpy (return_values.sals, values.sals, |
| 427 | (nelts * sizeof (struct symtab_and_line))); |
| 428 | return_values.nelts = nelts; |
| 429 | discard_cleanups (old_chain); |
| 430 | return return_values; |
| 431 | } |
| 432 | |
| 433 | if (num >= nelts + 2) |
| 434 | { |
| 435 | printf_unfiltered ("No choice number %d.\n", num); |
| 436 | } |
| 437 | else |
| 438 | { |
| 439 | num -= 2; |
| 440 | if (values.sals[num].pc) |
| 441 | { |
| 442 | if (canonical_arr) |
| 443 | { |
| 444 | symname = SYMBOL_NAME (sym_arr[num]); |
| 445 | make_cleanup (xfree, symname); |
| 446 | canonical_arr[i] = savestring (symname, strlen (symname)); |
| 447 | } |
| 448 | return_values.sals[i++] = values.sals[num]; |
| 449 | values.sals[num].pc = 0; |
| 450 | } |
| 451 | else |
| 452 | { |
| 453 | printf_unfiltered ("duplicate request for %d ignored.\n", num); |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | args = arg1; |
| 458 | while (*args == ' ' || *args == '\t') |
| 459 | args++; |
| 460 | } |
| 461 | return_values.nelts = i; |
| 462 | discard_cleanups (old_chain); |
| 463 | return return_values; |
| 464 | } |
| 465 | \f |
| 466 | /* The parser of linespec itself. */ |
| 467 | |
| 468 | /* Parse a string that specifies a line number. |
| 469 | Pass the address of a char * variable; that variable will be |
| 470 | advanced over the characters actually parsed. |
| 471 | |
| 472 | The string can be: |
| 473 | |
| 474 | LINENUM -- that line number in current file. PC returned is 0. |
| 475 | FILE:LINENUM -- that line in that file. PC returned is 0. |
| 476 | FUNCTION -- line number of openbrace of that function. |
| 477 | PC returned is the start of the function. |
| 478 | VARIABLE -- line number of definition of that variable. |
| 479 | PC returned is 0. |
| 480 | FILE:FUNCTION -- likewise, but prefer functions in that file. |
| 481 | *EXPR -- line in which address EXPR appears. |
| 482 | |
| 483 | This may all be followed by an "if EXPR", which we ignore. |
| 484 | |
| 485 | FUNCTION may be an undebuggable function found in minimal symbol table. |
| 486 | |
| 487 | If the argument FUNFIRSTLINE is nonzero, we want the first line |
| 488 | of real code inside a function when a function is specified, and it is |
| 489 | not OK to specify a variable or type to get its line number. |
| 490 | |
| 491 | DEFAULT_SYMTAB specifies the file to use if none is specified. |
| 492 | It defaults to current_source_symtab. |
| 493 | DEFAULT_LINE specifies the line number to use for relative |
| 494 | line numbers (that start with signs). Defaults to current_source_line. |
| 495 | If CANONICAL is non-NULL, store an array of strings containing the canonical |
| 496 | line specs there if necessary. Currently overloaded member functions and |
| 497 | line numbers or static functions without a filename yield a canonical |
| 498 | line spec. The array and the line spec strings are allocated on the heap, |
| 499 | it is the callers responsibility to free them. |
| 500 | |
| 501 | Note that it is possible to return zero for the symtab |
| 502 | if no file is validly specified. Callers must check that. |
| 503 | Also, the line number returned may be invalid. */ |
| 504 | |
| 505 | /* We allow single quotes in various places. This is a hideous |
| 506 | kludge, which exists because the completer can't yet deal with the |
| 507 | lack of single quotes. FIXME: write a linespec_completer which we |
| 508 | can use as appropriate instead of make_symbol_completion_list. */ |
| 509 | |
| 510 | struct symtabs_and_lines |
| 511 | decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, |
| 512 | int default_line, char ***canonical) |
| 513 | { |
| 514 | struct symtabs_and_lines values; |
| 515 | struct symtab_and_line val; |
| 516 | register char *p, *p1; |
| 517 | char *q, *pp, *ii, *p2; |
| 518 | #if 0 |
| 519 | char *q1; |
| 520 | #endif |
| 521 | register struct symtab *s; |
| 522 | |
| 523 | register struct symbol *sym; |
| 524 | /* The symtab that SYM was found in. */ |
| 525 | struct symtab *sym_symtab; |
| 526 | |
| 527 | register CORE_ADDR pc; |
| 528 | register struct minimal_symbol *msymbol; |
| 529 | char *copy; |
| 530 | struct symbol *sym_class; |
| 531 | int i1; |
| 532 | int is_quoted; |
| 533 | int is_quote_enclosed; |
| 534 | int has_parens; |
| 535 | int has_if = 0; |
| 536 | int has_comma = 0; |
| 537 | struct symbol **sym_arr; |
| 538 | struct type *t; |
| 539 | char *saved_arg = *argptr; |
| 540 | extern char *gdb_completer_quote_characters; |
| 541 | |
| 542 | INIT_SAL (&val); /* initialize to zeroes */ |
| 543 | |
| 544 | /* Defaults have defaults. */ |
| 545 | |
| 546 | if (default_symtab == 0) |
| 547 | { |
| 548 | default_symtab = current_source_symtab; |
| 549 | default_line = current_source_line; |
| 550 | } |
| 551 | |
| 552 | /* See if arg is *PC */ |
| 553 | |
| 554 | if (**argptr == '*') |
| 555 | { |
| 556 | (*argptr)++; |
| 557 | pc = parse_and_eval_address_1 (argptr); |
| 558 | |
| 559 | values.sals = (struct symtab_and_line *) |
| 560 | xmalloc (sizeof (struct symtab_and_line)); |
| 561 | |
| 562 | values.nelts = 1; |
| 563 | values.sals[0] = find_pc_line (pc, 0); |
| 564 | values.sals[0].pc = pc; |
| 565 | values.sals[0].section = find_pc_overlay (pc); |
| 566 | |
| 567 | return values; |
| 568 | } |
| 569 | |
| 570 | /* 'has_if' is for the syntax: |
| 571 | * (gdb) break foo if (a==b) |
| 572 | */ |
| 573 | if ((ii = strstr (*argptr, " if ")) != NULL || |
| 574 | (ii = strstr (*argptr, "\tif ")) != NULL || |
| 575 | (ii = strstr (*argptr, " if\t")) != NULL || |
| 576 | (ii = strstr (*argptr, "\tif\t")) != NULL || |
| 577 | (ii = strstr (*argptr, " if(")) != NULL || |
| 578 | (ii = strstr (*argptr, "\tif( ")) != NULL) |
| 579 | has_if = 1; |
| 580 | /* Temporarily zap out "if (condition)" to not |
| 581 | * confuse the parenthesis-checking code below. |
| 582 | * This is undone below. Do not change ii!! |
| 583 | */ |
| 584 | if (has_if) |
| 585 | { |
| 586 | *ii = '\0'; |
| 587 | } |
| 588 | |
| 589 | /* Set various flags. |
| 590 | * 'has_parens' is important for overload checking, where |
| 591 | * we allow things like: |
| 592 | * (gdb) break c::f(int) |
| 593 | */ |
| 594 | |
| 595 | /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */ |
| 596 | |
| 597 | is_quoted = (**argptr |
| 598 | && strchr (get_gdb_completer_quote_characters (), |
| 599 | **argptr) != NULL); |
| 600 | |
| 601 | has_parens = ((pp = strchr (*argptr, '(')) != NULL |
| 602 | && (pp = strrchr (pp, ')')) != NULL); |
| 603 | |
| 604 | /* Now that we're safely past the has_parens check, |
| 605 | * put back " if (condition)" so outer layers can see it |
| 606 | */ |
| 607 | if (has_if) |
| 608 | *ii = ' '; |
| 609 | |
| 610 | /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM |
| 611 | and we must isolate the first half. Outer layers will call again later |
| 612 | for the second half. |
| 613 | |
| 614 | Don't count commas that appear in argument lists of overloaded |
| 615 | functions, or in quoted strings. It's stupid to go to this much |
| 616 | trouble when the rest of the function is such an obvious roach hotel. */ |
| 617 | ii = find_toplevel_char (*argptr, ','); |
| 618 | has_comma = (ii != 0); |
| 619 | |
| 620 | /* Temporarily zap out second half to not |
| 621 | * confuse the code below. |
| 622 | * This is undone below. Do not change ii!! |
| 623 | */ |
| 624 | if (has_comma) |
| 625 | { |
| 626 | *ii = '\0'; |
| 627 | } |
| 628 | |
| 629 | /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */ |
| 630 | /* May also be CLASS::MEMBER, or NAMESPACE::NAME */ |
| 631 | /* Look for ':', but ignore inside of <> */ |
| 632 | |
| 633 | s = NULL; |
| 634 | p = *argptr; |
| 635 | if (p[0] == '"') |
| 636 | { |
| 637 | is_quote_enclosed = 1; |
| 638 | (*argptr)++; |
| 639 | p++; |
| 640 | } |
| 641 | else |
| 642 | is_quote_enclosed = 0; |
| 643 | for (; *p; p++) |
| 644 | { |
| 645 | if (p[0] == '<') |
| 646 | { |
| 647 | char *temp_end = find_template_name_end (p); |
| 648 | if (!temp_end) |
| 649 | error ("malformed template specification in command"); |
| 650 | p = temp_end; |
| 651 | } |
| 652 | /* Check for the end of the first half of the linespec. End of line, |
| 653 | a tab, a double colon or the last single colon, or a space. But |
| 654 | if enclosed in double quotes we do not break on enclosed spaces */ |
| 655 | if (!*p |
| 656 | || p[0] == '\t' |
| 657 | || ((p[0] == ':') |
| 658 | && ((p[1] == ':') || (strchr (p + 1, ':') == NULL))) |
| 659 | || ((p[0] == ' ') && !is_quote_enclosed)) |
| 660 | break; |
| 661 | if (p[0] == '.' && strchr (p, ':') == NULL) /* Java qualified method. */ |
| 662 | { |
| 663 | /* Find the *last* '.', since the others are package qualifiers. */ |
| 664 | for (p1 = p; *p1; p1++) |
| 665 | { |
| 666 | if (*p1 == '.') |
| 667 | p = p1; |
| 668 | } |
| 669 | break; |
| 670 | } |
| 671 | } |
| 672 | while (p[0] == ' ' || p[0] == '\t') |
| 673 | p++; |
| 674 | |
| 675 | /* if the closing double quote was left at the end, remove it */ |
| 676 | if (is_quote_enclosed) |
| 677 | { |
| 678 | char *closing_quote = strchr (p - 1, '"'); |
| 679 | if (closing_quote && closing_quote[1] == '\0') |
| 680 | *closing_quote = '\0'; |
| 681 | } |
| 682 | |
| 683 | /* Now that we've safely parsed the first half, |
| 684 | * put back ',' so outer layers can see it |
| 685 | */ |
| 686 | if (has_comma) |
| 687 | *ii = ','; |
| 688 | |
| 689 | if ((p[0] == ':' || p[0] == '.') && !has_parens) |
| 690 | { |
| 691 | /* C++ */ |
| 692 | /* ... or Java */ |
| 693 | if (is_quoted) |
| 694 | *argptr = *argptr + 1; |
| 695 | if (p[0] == '.' || p[1] == ':') |
| 696 | { |
| 697 | char *saved_arg2 = *argptr; |
| 698 | char *temp_end; |
| 699 | /* First check for "global" namespace specification, |
| 700 | of the form "::foo". If found, skip over the colons |
| 701 | and jump to normal symbol processing */ |
| 702 | if (p[0] == ':' |
| 703 | && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t'))) |
| 704 | saved_arg2 += 2; |
| 705 | |
| 706 | /* We have what looks like a class or namespace |
| 707 | scope specification (A::B), possibly with many |
| 708 | levels of namespaces or classes (A::B::C::D). |
| 709 | |
| 710 | Some versions of the HP ANSI C++ compiler (as also possibly |
| 711 | other compilers) generate class/function/member names with |
| 712 | embedded double-colons if they are inside namespaces. To |
| 713 | handle this, we loop a few times, considering larger and |
| 714 | larger prefixes of the string as though they were single |
| 715 | symbols. So, if the initially supplied string is |
| 716 | A::B::C::D::foo, we have to look up "A", then "A::B", |
| 717 | then "A::B::C", then "A::B::C::D", and finally |
| 718 | "A::B::C::D::foo" as single, monolithic symbols, because |
| 719 | A, B, C or D may be namespaces. |
| 720 | |
| 721 | Note that namespaces can nest only inside other |
| 722 | namespaces, and not inside classes. So we need only |
| 723 | consider *prefixes* of the string; there is no need to look up |
| 724 | "B::C" separately as a symbol in the previous example. */ |
| 725 | |
| 726 | p2 = p; /* save for restart */ |
| 727 | while (1) |
| 728 | { |
| 729 | /* Extract the class name. */ |
| 730 | p1 = p; |
| 731 | while (p != *argptr && p[-1] == ' ') |
| 732 | --p; |
| 733 | copy = (char *) alloca (p - *argptr + 1); |
| 734 | memcpy (copy, *argptr, p - *argptr); |
| 735 | copy[p - *argptr] = 0; |
| 736 | |
| 737 | /* Discard the class name from the arg. */ |
| 738 | p = p1 + (p1[0] == ':' ? 2 : 1); |
| 739 | while (*p == ' ' || *p == '\t') |
| 740 | p++; |
| 741 | *argptr = p; |
| 742 | |
| 743 | sym_class = lookup_symbol (copy, 0, STRUCT_NAMESPACE, 0, |
| 744 | (struct symtab **) NULL); |
| 745 | |
| 746 | if (sym_class && |
| 747 | (t = check_typedef (SYMBOL_TYPE (sym_class)), |
| 748 | (TYPE_CODE (t) == TYPE_CODE_STRUCT |
| 749 | || TYPE_CODE (t) == TYPE_CODE_UNION))) |
| 750 | { |
| 751 | /* Arg token is not digits => try it as a function name |
| 752 | Find the next token(everything up to end or next blank). */ |
| 753 | if (**argptr |
| 754 | && strchr (get_gdb_completer_quote_characters (), |
| 755 | **argptr) != NULL) |
| 756 | { |
| 757 | p = skip_quoted (*argptr); |
| 758 | *argptr = *argptr + 1; |
| 759 | } |
| 760 | else |
| 761 | { |
| 762 | p = *argptr; |
| 763 | while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':') |
| 764 | p++; |
| 765 | } |
| 766 | /* |
| 767 | q = operator_chars (*argptr, &q1); |
| 768 | if (q1 - q) |
| 769 | { |
| 770 | char *opname; |
| 771 | char *tmp = alloca (q1 - q + 1); |
| 772 | memcpy (tmp, q, q1 - q); |
| 773 | tmp[q1 - q] = '\0'; |
| 774 | opname = cplus_mangle_opname (tmp, DMGL_ANSI); |
| 775 | if (opname == NULL) |
| 776 | { |
| 777 | cplusplus_error (saved_arg, "no mangling for \"%s\"\n", tmp); |
| 778 | } |
| 779 | copy = (char*) alloca (3 + strlen(opname)); |
| 780 | sprintf (copy, "__%s", opname); |
| 781 | p = q1; |
| 782 | } |
| 783 | else |
| 784 | */ |
| 785 | { |
| 786 | copy = (char *) alloca (p - *argptr + 1); |
| 787 | memcpy (copy, *argptr, p - *argptr); |
| 788 | copy[p - *argptr] = '\0'; |
| 789 | if (p != *argptr |
| 790 | && copy[p - *argptr - 1] |
| 791 | && strchr (get_gdb_completer_quote_characters (), |
| 792 | copy[p - *argptr - 1]) != NULL) |
| 793 | copy[p - *argptr - 1] = '\0'; |
| 794 | } |
| 795 | |
| 796 | /* no line number may be specified */ |
| 797 | while (*p == ' ' || *p == '\t') |
| 798 | p++; |
| 799 | *argptr = p; |
| 800 | |
| 801 | sym = 0; |
| 802 | i1 = 0; /* counter for the symbol array */ |
| 803 | sym_arr = (struct symbol **) alloca (total_number_of_methods (t) |
| 804 | * sizeof (struct symbol *)); |
| 805 | |
| 806 | if (destructor_name_p (copy, t)) |
| 807 | { |
| 808 | /* Destructors are a special case. */ |
| 809 | int m_index, f_index; |
| 810 | |
| 811 | if (get_destructor_fn_field (t, &m_index, &f_index)) |
| 812 | { |
| 813 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index); |
| 814 | |
| 815 | sym_arr[i1] = |
| 816 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index), |
| 817 | NULL, VAR_NAMESPACE, (int *) NULL, |
| 818 | (struct symtab **) NULL); |
| 819 | if (sym_arr[i1]) |
| 820 | i1++; |
| 821 | } |
| 822 | } |
| 823 | else |
| 824 | i1 = find_methods (t, copy, sym_arr); |
| 825 | if (i1 == 1) |
| 826 | { |
| 827 | /* There is exactly one field with that name. */ |
| 828 | sym = sym_arr[0]; |
| 829 | |
| 830 | if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 831 | { |
| 832 | values.sals = (struct symtab_and_line *) |
| 833 | xmalloc (sizeof (struct symtab_and_line)); |
| 834 | values.nelts = 1; |
| 835 | values.sals[0] = find_function_start_sal (sym, |
| 836 | funfirstline); |
| 837 | } |
| 838 | else |
| 839 | { |
| 840 | values.nelts = 0; |
| 841 | } |
| 842 | return values; |
| 843 | } |
| 844 | if (i1 > 0) |
| 845 | { |
| 846 | /* There is more than one field with that name |
| 847 | (overloaded). Ask the user which one to use. */ |
| 848 | return decode_line_2 (sym_arr, i1, funfirstline, canonical); |
| 849 | } |
| 850 | else |
| 851 | { |
| 852 | char *tmp; |
| 853 | |
| 854 | if (is_operator_name (copy)) |
| 855 | { |
| 856 | tmp = (char *) alloca (strlen (copy + 3) + 9); |
| 857 | strcpy (tmp, "operator "); |
| 858 | strcat (tmp, copy + 3); |
| 859 | } |
| 860 | else |
| 861 | tmp = copy; |
| 862 | if (tmp[0] == '~') |
| 863 | cplusplus_error (saved_arg, |
| 864 | "the class `%s' does not have destructor defined\n", |
| 865 | SYMBOL_SOURCE_NAME (sym_class)); |
| 866 | else |
| 867 | cplusplus_error (saved_arg, |
| 868 | "the class %s does not have any method named %s\n", |
| 869 | SYMBOL_SOURCE_NAME (sym_class), tmp); |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | /* Move pointer up to next possible class/namespace token */ |
| 874 | p = p2 + 1; /* restart with old value +1 */ |
| 875 | /* Move pointer ahead to next double-colon */ |
| 876 | while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')) |
| 877 | { |
| 878 | if (p[0] == '<') |
| 879 | { |
| 880 | temp_end = find_template_name_end (p); |
| 881 | if (!temp_end) |
| 882 | error ("malformed template specification in command"); |
| 883 | p = temp_end; |
| 884 | } |
| 885 | else if ((p[0] == ':') && (p[1] == ':')) |
| 886 | break; /* found double-colon */ |
| 887 | else |
| 888 | p++; |
| 889 | } |
| 890 | |
| 891 | if (*p != ':') |
| 892 | break; /* out of the while (1) */ |
| 893 | |
| 894 | p2 = p; /* save restart for next time around */ |
| 895 | *argptr = saved_arg2; /* restore argptr */ |
| 896 | } /* while (1) */ |
| 897 | |
| 898 | /* Last chance attempt -- check entire name as a symbol */ |
| 899 | /* Use "copy" in preparation for jumping out of this block, |
| 900 | to be consistent with usage following the jump target */ |
| 901 | copy = (char *) alloca (p - saved_arg2 + 1); |
| 902 | memcpy (copy, saved_arg2, p - saved_arg2); |
| 903 | /* Note: if is_quoted should be true, we snuff out quote here anyway */ |
| 904 | copy[p - saved_arg2] = '\000'; |
| 905 | /* Set argptr to skip over the name */ |
| 906 | *argptr = (*p == '\'') ? p + 1 : p; |
| 907 | /* Look up entire name */ |
| 908 | sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); |
| 909 | s = (struct symtab *) 0; |
| 910 | /* Prepare to jump: restore the " if (condition)" so outer layers see it */ |
| 911 | /* Symbol was found --> jump to normal symbol processing. |
| 912 | Code following "symbol_found" expects "copy" to have the |
| 913 | symbol name, "sym" to have the symbol pointer, "s" to be |
| 914 | a specified file's symtab, and sym_symtab to be the symbol's |
| 915 | symtab. */ |
| 916 | /* By jumping there we avoid falling through the FILE:LINE and |
| 917 | FILE:FUNC processing stuff below */ |
| 918 | if (sym) |
| 919 | goto symbol_found; |
| 920 | |
| 921 | /* Couldn't find any interpretation as classes/namespaces, so give up */ |
| 922 | /* The quotes are important if copy is empty. */ |
| 923 | cplusplus_error (saved_arg, |
| 924 | "Can't find member of namespace, class, struct, or union named \"%s\"\n", |
| 925 | copy); |
| 926 | } |
| 927 | /* end of C++ */ |
| 928 | |
| 929 | |
| 930 | /* Extract the file name. */ |
| 931 | p1 = p; |
| 932 | while (p != *argptr && p[-1] == ' ') |
| 933 | --p; |
| 934 | if ((*p == '"') && is_quote_enclosed) |
| 935 | --p; |
| 936 | copy = (char *) alloca (p - *argptr + 1); |
| 937 | memcpy (copy, *argptr, p - *argptr); |
| 938 | /* It may have the ending quote right after the file name */ |
| 939 | if (is_quote_enclosed && copy[p - *argptr - 1] == '"') |
| 940 | copy[p - *argptr - 1] = 0; |
| 941 | else |
| 942 | copy[p - *argptr] = 0; |
| 943 | |
| 944 | /* Find that file's data. */ |
| 945 | s = lookup_symtab (copy); |
| 946 | if (s == 0) |
| 947 | { |
| 948 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 949 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 950 | error ("No source file named %s.", copy); |
| 951 | } |
| 952 | |
| 953 | /* Discard the file name from the arg. */ |
| 954 | p = p1 + 1; |
| 955 | while (*p == ' ' || *p == '\t') |
| 956 | p++; |
| 957 | *argptr = p; |
| 958 | } |
| 959 | #if 0 |
| 960 | /* No one really seems to know why this was added. It certainly |
| 961 | breaks the command line, though, whenever the passed |
| 962 | name is of the form ClassName::Method. This bit of code |
| 963 | singles out the class name, and if funfirstline is set (for |
| 964 | example, you are setting a breakpoint at this function), |
| 965 | you get an error. This did not occur with earlier |
| 966 | verions, so I am ifdef'ing this out. 3/29/99 */ |
| 967 | else |
| 968 | { |
| 969 | /* Check if what we have till now is a symbol name */ |
| 970 | |
| 971 | /* We may be looking at a template instantiation such |
| 972 | as "foo<int>". Check here whether we know about it, |
| 973 | instead of falling through to the code below which |
| 974 | handles ordinary function names, because that code |
| 975 | doesn't like seeing '<' and '>' in a name -- the |
| 976 | skip_quoted call doesn't go past them. So see if we |
| 977 | can figure it out right now. */ |
| 978 | |
| 979 | copy = (char *) alloca (p - *argptr + 1); |
| 980 | memcpy (copy, *argptr, p - *argptr); |
| 981 | copy[p - *argptr] = '\000'; |
| 982 | sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); |
| 983 | if (sym) |
| 984 | { |
| 985 | /* Yes, we have a symbol; jump to symbol processing */ |
| 986 | /* Code after symbol_found expects S, SYM_SYMTAB, SYM, |
| 987 | and COPY to be set correctly */ |
| 988 | *argptr = (*p == '\'') ? p + 1 : p; |
| 989 | s = (struct symtab *) 0; |
| 990 | goto symbol_found; |
| 991 | } |
| 992 | /* Otherwise fall out from here and go to file/line spec |
| 993 | processing, etc. */ |
| 994 | } |
| 995 | #endif |
| 996 | |
| 997 | /* S is specified file's symtab, or 0 if no file specified. |
| 998 | arg no longer contains the file name. */ |
| 999 | |
| 1000 | /* Check whether arg is all digits (and sign) */ |
| 1001 | |
| 1002 | q = *argptr; |
| 1003 | if (*q == '-' || *q == '+') |
| 1004 | q++; |
| 1005 | while (*q >= '0' && *q <= '9') |
| 1006 | q++; |
| 1007 | |
| 1008 | if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')) |
| 1009 | { |
| 1010 | /* We found a token consisting of all digits -- at least one digit. */ |
| 1011 | enum sign |
| 1012 | { |
| 1013 | none, plus, minus |
| 1014 | } |
| 1015 | sign = none; |
| 1016 | |
| 1017 | /* We might need a canonical line spec if no file was specified. */ |
| 1018 | int need_canonical = (s == 0) ? 1 : 0; |
| 1019 | |
| 1020 | /* This is where we need to make sure that we have good defaults. |
| 1021 | We must guarantee that this section of code is never executed |
| 1022 | when we are called with just a function name, since |
| 1023 | select_source_symtab calls us with such an argument */ |
| 1024 | |
| 1025 | if (s == 0 && default_symtab == 0) |
| 1026 | { |
| 1027 | select_source_symtab (0); |
| 1028 | default_symtab = current_source_symtab; |
| 1029 | default_line = current_source_line; |
| 1030 | } |
| 1031 | |
| 1032 | if (**argptr == '+') |
| 1033 | sign = plus, (*argptr)++; |
| 1034 | else if (**argptr == '-') |
| 1035 | sign = minus, (*argptr)++; |
| 1036 | val.line = atoi (*argptr); |
| 1037 | switch (sign) |
| 1038 | { |
| 1039 | case plus: |
| 1040 | if (q == *argptr) |
| 1041 | val.line = 5; |
| 1042 | if (s == 0) |
| 1043 | val.line = default_line + val.line; |
| 1044 | break; |
| 1045 | case minus: |
| 1046 | if (q == *argptr) |
| 1047 | val.line = 15; |
| 1048 | if (s == 0) |
| 1049 | val.line = default_line - val.line; |
| 1050 | else |
| 1051 | val.line = 1; |
| 1052 | break; |
| 1053 | case none: |
| 1054 | break; /* No need to adjust val.line. */ |
| 1055 | } |
| 1056 | |
| 1057 | while (*q == ' ' || *q == '\t') |
| 1058 | q++; |
| 1059 | *argptr = q; |
| 1060 | if (s == 0) |
| 1061 | s = default_symtab; |
| 1062 | |
| 1063 | /* It is possible that this source file has more than one symtab, |
| 1064 | and that the new line number specification has moved us from the |
| 1065 | default (in s) to a new one. */ |
| 1066 | val.symtab = find_line_symtab (s, val.line, NULL, NULL); |
| 1067 | if (val.symtab == 0) |
| 1068 | val.symtab = s; |
| 1069 | |
| 1070 | val.pc = 0; |
| 1071 | values.sals = (struct symtab_and_line *) |
| 1072 | xmalloc (sizeof (struct symtab_and_line)); |
| 1073 | values.sals[0] = val; |
| 1074 | values.nelts = 1; |
| 1075 | if (need_canonical) |
| 1076 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 1077 | return values; |
| 1078 | } |
| 1079 | |
| 1080 | /* Arg token is not digits => try it as a variable name |
| 1081 | Find the next token (everything up to end or next whitespace). */ |
| 1082 | |
| 1083 | if (**argptr == '$') /* May be a convenience variable */ |
| 1084 | p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); /* One or two $ chars possible */ |
| 1085 | else if (is_quoted) |
| 1086 | { |
| 1087 | p = skip_quoted (*argptr); |
| 1088 | if (p[-1] != '\'') |
| 1089 | error ("Unmatched single quote."); |
| 1090 | } |
| 1091 | else if (has_parens) |
| 1092 | { |
| 1093 | p = pp + 1; |
| 1094 | } |
| 1095 | else |
| 1096 | { |
| 1097 | p = skip_quoted (*argptr); |
| 1098 | } |
| 1099 | |
| 1100 | copy = (char *) alloca (p - *argptr + 1); |
| 1101 | memcpy (copy, *argptr, p - *argptr); |
| 1102 | copy[p - *argptr] = '\0'; |
| 1103 | if (p != *argptr |
| 1104 | && copy[0] |
| 1105 | && copy[0] == copy[p - *argptr - 1] |
| 1106 | && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL) |
| 1107 | { |
| 1108 | copy[p - *argptr - 1] = '\0'; |
| 1109 | copy++; |
| 1110 | } |
| 1111 | while (*p == ' ' || *p == '\t') |
| 1112 | p++; |
| 1113 | *argptr = p; |
| 1114 | |
| 1115 | /* If it starts with $: may be a legitimate variable or routine name |
| 1116 | (e.g. HP-UX millicode routines such as $$dyncall), or it may |
| 1117 | be history value, or it may be a convenience variable */ |
| 1118 | |
| 1119 | if (*copy == '$') |
| 1120 | { |
| 1121 | struct value *valx; |
| 1122 | int index = 0; |
| 1123 | int need_canonical = 0; |
| 1124 | |
| 1125 | p = (copy[1] == '$') ? copy + 2 : copy + 1; |
| 1126 | while (*p >= '0' && *p <= '9') |
| 1127 | p++; |
| 1128 | if (!*p) /* reached end of token without hitting non-digit */ |
| 1129 | { |
| 1130 | /* We have a value history reference */ |
| 1131 | sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index); |
| 1132 | valx = access_value_history ((copy[1] == '$') ? -index : index); |
| 1133 | if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT) |
| 1134 | error ("History values used in line specs must have integer values."); |
| 1135 | } |
| 1136 | else |
| 1137 | { |
| 1138 | /* Not all digits -- may be user variable/function or a |
| 1139 | convenience variable */ |
| 1140 | |
| 1141 | /* Look up entire name as a symbol first */ |
| 1142 | sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); |
| 1143 | s = (struct symtab *) 0; |
| 1144 | need_canonical = 1; |
| 1145 | /* Symbol was found --> jump to normal symbol processing. |
| 1146 | Code following "symbol_found" expects "copy" to have the |
| 1147 | symbol name, "sym" to have the symbol pointer, "s" to be |
| 1148 | a specified file's symtab, and sym_symtab to be the symbol's |
| 1149 | symtab. */ |
| 1150 | if (sym) |
| 1151 | goto symbol_found; |
| 1152 | |
| 1153 | /* If symbol was not found, look in minimal symbol tables */ |
| 1154 | msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| 1155 | /* Min symbol was found --> jump to minsym processing. */ |
| 1156 | if (msymbol) |
| 1157 | goto minimal_symbol_found; |
| 1158 | |
| 1159 | /* Not a user variable or function -- must be convenience variable */ |
| 1160 | need_canonical = (s == 0) ? 1 : 0; |
| 1161 | valx = value_of_internalvar (lookup_internalvar (copy + 1)); |
| 1162 | if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT) |
| 1163 | error ("Convenience variables used in line specs must have integer values."); |
| 1164 | } |
| 1165 | |
| 1166 | /* Either history value or convenience value from above, in valx */ |
| 1167 | val.symtab = s ? s : default_symtab; |
| 1168 | val.line = value_as_long (valx); |
| 1169 | val.pc = 0; |
| 1170 | |
| 1171 | values.sals = (struct symtab_and_line *) xmalloc (sizeof val); |
| 1172 | values.sals[0] = val; |
| 1173 | values.nelts = 1; |
| 1174 | |
| 1175 | if (need_canonical) |
| 1176 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 1177 | |
| 1178 | return values; |
| 1179 | } |
| 1180 | |
| 1181 | |
| 1182 | /* Look up that token as a variable. |
| 1183 | If file specified, use that file's per-file block to start with. */ |
| 1184 | |
| 1185 | sym = lookup_symbol (copy, |
| 1186 | (s ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) |
| 1187 | : get_selected_block (0)), |
| 1188 | VAR_NAMESPACE, 0, &sym_symtab); |
| 1189 | |
| 1190 | symbol_found: /* We also jump here from inside the C++ class/namespace |
| 1191 | code on finding a symbol of the form "A::B::C" */ |
| 1192 | |
| 1193 | if (sym != NULL) |
| 1194 | { |
| 1195 | if (SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 1196 | { |
| 1197 | /* Arg is the name of a function */ |
| 1198 | values.sals = (struct symtab_and_line *) |
| 1199 | xmalloc (sizeof (struct symtab_and_line)); |
| 1200 | values.sals[0] = find_function_start_sal (sym, funfirstline); |
| 1201 | values.nelts = 1; |
| 1202 | |
| 1203 | /* Don't use the SYMBOL_LINE; if used at all it points to |
| 1204 | the line containing the parameters or thereabouts, not |
| 1205 | the first line of code. */ |
| 1206 | |
| 1207 | /* We might need a canonical line spec if it is a static |
| 1208 | function. */ |
| 1209 | if (s == 0) |
| 1210 | { |
| 1211 | struct blockvector *bv = BLOCKVECTOR (sym_symtab); |
| 1212 | struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 1213 | if (lookup_block_symbol (b, copy, NULL, VAR_NAMESPACE) != NULL) |
| 1214 | build_canonical_line_spec (values.sals, copy, canonical); |
| 1215 | } |
| 1216 | return values; |
| 1217 | } |
| 1218 | else |
| 1219 | { |
| 1220 | if (funfirstline) |
| 1221 | error ("\"%s\" is not a function", copy); |
| 1222 | else if (SYMBOL_LINE (sym) != 0) |
| 1223 | { |
| 1224 | /* We know its line number. */ |
| 1225 | values.sals = (struct symtab_and_line *) |
| 1226 | xmalloc (sizeof (struct symtab_and_line)); |
| 1227 | values.nelts = 1; |
| 1228 | memset (&values.sals[0], 0, sizeof (values.sals[0])); |
| 1229 | values.sals[0].symtab = sym_symtab; |
| 1230 | values.sals[0].line = SYMBOL_LINE (sym); |
| 1231 | return values; |
| 1232 | } |
| 1233 | else |
| 1234 | /* This can happen if it is compiled with a compiler which doesn't |
| 1235 | put out line numbers for variables. */ |
| 1236 | /* FIXME: Shouldn't we just set .line and .symtab to zero |
| 1237 | and return? For example, "info line foo" could print |
| 1238 | the address. */ |
| 1239 | error ("Line number not known for symbol \"%s\"", copy); |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| 1244 | |
| 1245 | minimal_symbol_found: /* We also jump here from the case for variables |
| 1246 | that begin with '$' */ |
| 1247 | |
| 1248 | if (msymbol != NULL) |
| 1249 | { |
| 1250 | values.sals = (struct symtab_and_line *) |
| 1251 | xmalloc (sizeof (struct symtab_and_line)); |
| 1252 | values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol), |
| 1253 | (struct sec *) 0, 0); |
| 1254 | values.sals[0].section = SYMBOL_BFD_SECTION (msymbol); |
| 1255 | if (funfirstline) |
| 1256 | { |
| 1257 | values.sals[0].pc += FUNCTION_START_OFFSET; |
| 1258 | values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc); |
| 1259 | } |
| 1260 | values.nelts = 1; |
| 1261 | return values; |
| 1262 | } |
| 1263 | |
| 1264 | if (!have_full_symbols () && |
| 1265 | !have_partial_symbols () && !have_minimal_symbols ()) |
| 1266 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 1267 | |
| 1268 | error ("Function \"%s\" not defined.", copy); |
| 1269 | return values; /* for lint */ |
| 1270 | } |