| 1 | /* Parser for linespec for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, |
| 5 | 2009 Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "frame.h" |
| 25 | #include "command.h" |
| 26 | #include "symfile.h" |
| 27 | #include "objfiles.h" |
| 28 | #include "source.h" |
| 29 | #include "demangle.h" |
| 30 | #include "value.h" |
| 31 | #include "completer.h" |
| 32 | #include "cp-abi.h" |
| 33 | #include "parser-defs.h" |
| 34 | #include "block.h" |
| 35 | #include "objc-lang.h" |
| 36 | #include "linespec.h" |
| 37 | #include "exceptions.h" |
| 38 | #include "language.h" |
| 39 | #include "interps.h" |
| 40 | #include "mi/mi-cmds.h" |
| 41 | #include "target.h" |
| 42 | |
| 43 | /* We share this one with symtab.c, but it is not exported widely. */ |
| 44 | |
| 45 | extern char *operator_chars (char *, char **); |
| 46 | |
| 47 | /* Prototypes for local functions */ |
| 48 | |
| 49 | static void initialize_defaults (struct symtab **default_symtab, |
| 50 | int *default_line); |
| 51 | |
| 52 | static void set_flags (char *arg, int *is_quoted, char **paren_pointer); |
| 53 | |
| 54 | static struct symtabs_and_lines decode_indirect (char **argptr); |
| 55 | |
| 56 | static char *locate_first_half (char **argptr, int *is_quote_enclosed); |
| 57 | |
| 58 | static struct symtabs_and_lines decode_objc (char **argptr, |
| 59 | int funfirstline, |
| 60 | struct symtab *file_symtab, |
| 61 | char ***canonical, |
| 62 | char *saved_arg); |
| 63 | |
| 64 | static struct symtabs_and_lines decode_compound (char **argptr, |
| 65 | int funfirstline, |
| 66 | char ***canonical, |
| 67 | char *saved_arg, |
| 68 | char *p, |
| 69 | int *not_found_ptr); |
| 70 | |
| 71 | static struct symbol *lookup_prefix_sym (char **argptr, char *p); |
| 72 | |
| 73 | static struct symtabs_and_lines find_method (int funfirstline, |
| 74 | char ***canonical, |
| 75 | char *saved_arg, |
| 76 | char *copy, |
| 77 | struct type *t, |
| 78 | struct symbol *sym_class, |
| 79 | int *not_found_ptr); |
| 80 | |
| 81 | static NORETURN void cplusplus_error (const char *name, |
| 82 | const char *fmt, ...) |
| 83 | ATTR_NORETURN ATTR_FORMAT (printf, 2, 3); |
| 84 | |
| 85 | static int total_number_of_methods (struct type *type); |
| 86 | |
| 87 | static int find_methods (struct type *, char *, |
| 88 | enum language, struct symbol **); |
| 89 | |
| 90 | static int add_matching_methods (int method_counter, struct type *t, |
| 91 | enum language language, |
| 92 | struct symbol **sym_arr); |
| 93 | |
| 94 | static int add_constructors (int method_counter, struct type *t, |
| 95 | enum language language, |
| 96 | struct symbol **sym_arr); |
| 97 | |
| 98 | static void build_canonical_line_spec (struct symtab_and_line *, |
| 99 | char *, char ***); |
| 100 | |
| 101 | static char *find_toplevel_char (char *s, char c); |
| 102 | |
| 103 | static int is_objc_method_format (const char *s); |
| 104 | |
| 105 | static struct symtabs_and_lines decode_line_2 (struct symbol *[], |
| 106 | int, int, char ***); |
| 107 | |
| 108 | static struct symtab *symtab_from_filename (char **argptr, |
| 109 | char *p, int is_quote_enclosed, |
| 110 | int *not_found_ptr); |
| 111 | |
| 112 | static struct |
| 113 | symtabs_and_lines decode_all_digits (char **argptr, |
| 114 | struct symtab *default_symtab, |
| 115 | int default_line, |
| 116 | char ***canonical, |
| 117 | struct symtab *file_symtab, |
| 118 | char *q); |
| 119 | |
| 120 | static struct symtabs_and_lines decode_dollar (char *copy, |
| 121 | int funfirstline, |
| 122 | struct symtab *default_symtab, |
| 123 | char ***canonical, |
| 124 | struct symtab *file_symtab); |
| 125 | |
| 126 | static struct symtabs_and_lines decode_variable (char *copy, |
| 127 | int funfirstline, |
| 128 | char ***canonical, |
| 129 | struct symtab *file_symtab, |
| 130 | int *not_found_ptr); |
| 131 | |
| 132 | static struct |
| 133 | symtabs_and_lines symbol_found (int funfirstline, |
| 134 | char ***canonical, |
| 135 | char *copy, |
| 136 | struct symbol *sym, |
| 137 | struct symtab *file_symtab); |
| 138 | |
| 139 | static struct |
| 140 | symtabs_and_lines minsym_found (int funfirstline, |
| 141 | struct minimal_symbol *msymbol); |
| 142 | |
| 143 | /* Helper functions. */ |
| 144 | |
| 145 | /* Issue a helpful hint on using the command completion feature on |
| 146 | single quoted demangled C++ symbols as part of the completion |
| 147 | error. */ |
| 148 | |
| 149 | static NORETURN void |
| 150 | cplusplus_error (const char *name, const char *fmt, ...) |
| 151 | { |
| 152 | struct ui_file *tmp_stream; |
| 153 | char *message; |
| 154 | tmp_stream = mem_fileopen (); |
| 155 | make_cleanup_ui_file_delete (tmp_stream); |
| 156 | |
| 157 | { |
| 158 | va_list args; |
| 159 | va_start (args, fmt); |
| 160 | vfprintf_unfiltered (tmp_stream, fmt, args); |
| 161 | va_end (args); |
| 162 | } |
| 163 | |
| 164 | while (*name == '\'') |
| 165 | name++; |
| 166 | fprintf_unfiltered (tmp_stream, |
| 167 | ("Hint: try '%s<TAB> or '%s<ESC-?>\n" |
| 168 | "(Note leading single quote.)"), |
| 169 | name, name); |
| 170 | |
| 171 | message = ui_file_xstrdup (tmp_stream, NULL); |
| 172 | make_cleanup (xfree, message); |
| 173 | throw_error (NOT_FOUND_ERROR, "%s", message); |
| 174 | } |
| 175 | |
| 176 | /* Return the number of methods described for TYPE, including the |
| 177 | methods from types it derives from. This can't be done in the symbol |
| 178 | reader because the type of the baseclass might still be stubbed |
| 179 | when the definition of the derived class is parsed. */ |
| 180 | |
| 181 | static int |
| 182 | total_number_of_methods (struct type *type) |
| 183 | { |
| 184 | int n; |
| 185 | int count; |
| 186 | |
| 187 | CHECK_TYPEDEF (type); |
| 188 | if (TYPE_CPLUS_SPECIFIC (type) == NULL) |
| 189 | return 0; |
| 190 | count = TYPE_NFN_FIELDS_TOTAL (type); |
| 191 | |
| 192 | for (n = 0; n < TYPE_N_BASECLASSES (type); n++) |
| 193 | count += total_number_of_methods (TYPE_BASECLASS (type, n)); |
| 194 | |
| 195 | return count; |
| 196 | } |
| 197 | |
| 198 | /* Recursive helper function for decode_line_1. |
| 199 | Look for methods named NAME in type T. |
| 200 | Return number of matches. |
| 201 | Put matches in SYM_ARR, which should have been allocated with |
| 202 | a size of total_number_of_methods (T) * sizeof (struct symbol *). |
| 203 | Note that this function is g++ specific. */ |
| 204 | |
| 205 | static int |
| 206 | find_methods (struct type *t, char *name, enum language language, |
| 207 | struct symbol **sym_arr) |
| 208 | { |
| 209 | int i1 = 0; |
| 210 | int ibase; |
| 211 | char *class_name = type_name_no_tag (t); |
| 212 | |
| 213 | /* Ignore this class if it doesn't have a name. This is ugly, but |
| 214 | unless we figure out how to get the physname without the name of |
| 215 | the class, then the loop can't do any good. */ |
| 216 | if (class_name |
| 217 | && (lookup_symbol_in_language (class_name, (struct block *) NULL, |
| 218 | STRUCT_DOMAIN, language, (int *) NULL))) |
| 219 | { |
| 220 | int method_counter; |
| 221 | int name_len = strlen (name); |
| 222 | |
| 223 | CHECK_TYPEDEF (t); |
| 224 | |
| 225 | /* Loop over each method name. At this level, all overloads of a name |
| 226 | are counted as a single name. There is an inner loop which loops over |
| 227 | each overload. */ |
| 228 | |
| 229 | for (method_counter = TYPE_NFN_FIELDS (t) - 1; |
| 230 | method_counter >= 0; |
| 231 | --method_counter) |
| 232 | { |
| 233 | char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter); |
| 234 | char dem_opname[64]; |
| 235 | |
| 236 | if (strncmp (method_name, "__", 2) == 0 || |
| 237 | strncmp (method_name, "op", 2) == 0 || |
| 238 | strncmp (method_name, "type", 4) == 0) |
| 239 | { |
| 240 | if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI)) |
| 241 | method_name = dem_opname; |
| 242 | else if (cplus_demangle_opname (method_name, dem_opname, 0)) |
| 243 | method_name = dem_opname; |
| 244 | } |
| 245 | |
| 246 | if (strcmp_iw (name, method_name) == 0) |
| 247 | /* Find all the overloaded methods with that name. */ |
| 248 | i1 += add_matching_methods (method_counter, t, language, |
| 249 | sym_arr + i1); |
| 250 | else if (strncmp (class_name, name, name_len) == 0 |
| 251 | && (class_name[name_len] == '\0' |
| 252 | || class_name[name_len] == '<')) |
| 253 | i1 += add_constructors (method_counter, t, language, |
| 254 | sym_arr + i1); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* Only search baseclasses if there is no match yet, since names in |
| 259 | derived classes override those in baseclasses. |
| 260 | |
| 261 | FIXME: The above is not true; it is only true of member functions |
| 262 | if they have the same number of arguments (??? - section 13.1 of the |
| 263 | ARM says the function members are not in the same scope but doesn't |
| 264 | really spell out the rules in a way I understand. In any case, if |
| 265 | the number of arguments differ this is a case in which we can overload |
| 266 | rather than hiding without any problem, and gcc 2.4.5 does overload |
| 267 | rather than hiding in this case). */ |
| 268 | |
| 269 | if (i1 == 0) |
| 270 | for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++) |
| 271 | i1 += find_methods (TYPE_BASECLASS (t, ibase), name, |
| 272 | language, sym_arr + i1); |
| 273 | |
| 274 | return i1; |
| 275 | } |
| 276 | |
| 277 | /* Add the symbols associated to methods of the class whose type is T |
| 278 | and whose name matches the method indexed by METHOD_COUNTER in the |
| 279 | array SYM_ARR. Return the number of methods added. */ |
| 280 | |
| 281 | static int |
| 282 | add_matching_methods (int method_counter, struct type *t, |
| 283 | enum language language, struct symbol **sym_arr) |
| 284 | { |
| 285 | int field_counter; |
| 286 | int i1 = 0; |
| 287 | |
| 288 | for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| 289 | field_counter >= 0; |
| 290 | --field_counter) |
| 291 | { |
| 292 | struct fn_field *f; |
| 293 | char *phys_name; |
| 294 | |
| 295 | f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| 296 | |
| 297 | if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| 298 | { |
| 299 | char *tmp_name; |
| 300 | |
| 301 | tmp_name = gdb_mangle_name (t, |
| 302 | method_counter, |
| 303 | field_counter); |
| 304 | phys_name = alloca (strlen (tmp_name) + 1); |
| 305 | strcpy (phys_name, tmp_name); |
| 306 | xfree (tmp_name); |
| 307 | } |
| 308 | else |
| 309 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| 310 | |
| 311 | sym_arr[i1] = lookup_symbol_in_language (phys_name, |
| 312 | NULL, VAR_DOMAIN, |
| 313 | language, |
| 314 | (int *) NULL); |
| 315 | if (sym_arr[i1]) |
| 316 | i1++; |
| 317 | else |
| 318 | { |
| 319 | /* This error message gets printed, but the method |
| 320 | still seems to be found |
| 321 | fputs_filtered("(Cannot find method ", gdb_stdout); |
| 322 | fprintf_symbol_filtered (gdb_stdout, phys_name, |
| 323 | language_cplus, |
| 324 | DMGL_PARAMS | DMGL_ANSI); |
| 325 | fputs_filtered(" - possibly inlined.)\n", gdb_stdout); |
| 326 | */ |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | return i1; |
| 331 | } |
| 332 | |
| 333 | /* Add the symbols associated to constructors of the class whose type |
| 334 | is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the |
| 335 | array SYM_ARR. Return the number of methods added. */ |
| 336 | |
| 337 | static int |
| 338 | add_constructors (int method_counter, struct type *t, |
| 339 | enum language language, struct symbol **sym_arr) |
| 340 | { |
| 341 | int field_counter; |
| 342 | int i1 = 0; |
| 343 | |
| 344 | /* For GCC 3.x and stabs, constructors and destructors |
| 345 | have names like __base_ctor and __complete_dtor. |
| 346 | Check the physname for now if we're looking for a |
| 347 | constructor. */ |
| 348 | for (field_counter |
| 349 | = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| 350 | field_counter >= 0; |
| 351 | --field_counter) |
| 352 | { |
| 353 | struct fn_field *f; |
| 354 | char *phys_name; |
| 355 | |
| 356 | f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| 357 | |
| 358 | /* GCC 3.x will never produce stabs stub methods, so |
| 359 | we don't need to handle this case. */ |
| 360 | if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| 361 | continue; |
| 362 | phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| 363 | if (! is_constructor_name (phys_name)) |
| 364 | continue; |
| 365 | |
| 366 | /* If this method is actually defined, include it in the |
| 367 | list. */ |
| 368 | sym_arr[i1] = lookup_symbol_in_language (phys_name, |
| 369 | NULL, VAR_DOMAIN, |
| 370 | language, |
| 371 | (int *) NULL); |
| 372 | if (sym_arr[i1]) |
| 373 | i1++; |
| 374 | } |
| 375 | |
| 376 | return i1; |
| 377 | } |
| 378 | |
| 379 | /* Helper function for decode_line_1. |
| 380 | Build a canonical line spec in CANONICAL if it is non-NULL and if |
| 381 | the SAL has a symtab. |
| 382 | If SYMNAME is non-NULL the canonical line spec is `filename:symname'. |
| 383 | If SYMNAME is NULL the line number from SAL is used and the canonical |
| 384 | line spec is `filename:linenum'. */ |
| 385 | |
| 386 | static void |
| 387 | build_canonical_line_spec (struct symtab_and_line *sal, char *symname, |
| 388 | char ***canonical) |
| 389 | { |
| 390 | char **canonical_arr; |
| 391 | char *canonical_name; |
| 392 | char *filename; |
| 393 | struct symtab *s = sal->symtab; |
| 394 | |
| 395 | if (s == (struct symtab *) NULL |
| 396 | || s->filename == (char *) NULL |
| 397 | || canonical == (char ***) NULL) |
| 398 | return; |
| 399 | |
| 400 | canonical_arr = (char **) xmalloc (sizeof (char *)); |
| 401 | *canonical = canonical_arr; |
| 402 | |
| 403 | filename = s->filename; |
| 404 | if (symname != NULL) |
| 405 | { |
| 406 | canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2); |
| 407 | sprintf (canonical_name, "%s:%s", filename, symname); |
| 408 | } |
| 409 | else |
| 410 | { |
| 411 | canonical_name = xmalloc (strlen (filename) + 30); |
| 412 | sprintf (canonical_name, "%s:%d", filename, sal->line); |
| 413 | } |
| 414 | canonical_arr[0] = canonical_name; |
| 415 | } |
| 416 | |
| 417 | |
| 418 | |
| 419 | /* Find an instance of the character C in the string S that is outside |
| 420 | of all parenthesis pairs, single-quoted strings, and double-quoted |
| 421 | strings. Also, ignore the char within a template name, like a ',' |
| 422 | within foo<int, int>. */ |
| 423 | |
| 424 | static char * |
| 425 | find_toplevel_char (char *s, char c) |
| 426 | { |
| 427 | int quoted = 0; /* zero if we're not in quotes; |
| 428 | '"' if we're in a double-quoted string; |
| 429 | '\'' if we're in a single-quoted string. */ |
| 430 | int depth = 0; /* Number of unclosed parens we've seen. */ |
| 431 | char *scan; |
| 432 | |
| 433 | for (scan = s; *scan; scan++) |
| 434 | { |
| 435 | if (quoted) |
| 436 | { |
| 437 | if (*scan == quoted) |
| 438 | quoted = 0; |
| 439 | else if (*scan == '\\' && *(scan + 1)) |
| 440 | scan++; |
| 441 | } |
| 442 | else if (*scan == c && ! quoted && depth == 0) |
| 443 | return scan; |
| 444 | else if (*scan == '"' || *scan == '\'') |
| 445 | quoted = *scan; |
| 446 | else if (*scan == '(' || *scan == '<') |
| 447 | depth++; |
| 448 | else if ((*scan == ')' || *scan == '>') && depth > 0) |
| 449 | depth--; |
| 450 | } |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | /* Determines if the gives string corresponds to an Objective-C method |
| 456 | representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols |
| 457 | are allowed to have spaces and parentheses in them. */ |
| 458 | |
| 459 | static int |
| 460 | is_objc_method_format (const char *s) |
| 461 | { |
| 462 | if (s == NULL || *s == '\0') |
| 463 | return 0; |
| 464 | /* Handle arguments with the format FILENAME:SYMBOL. */ |
| 465 | if ((s[0] == ':') && (strchr ("+-", s[1]) != NULL) |
| 466 | && (s[2] == '[') && strchr(s, ']')) |
| 467 | return 1; |
| 468 | /* Handle arguments that are just SYMBOL. */ |
| 469 | else if ((strchr ("+-", s[0]) != NULL) && (s[1] == '[') && strchr(s, ']')) |
| 470 | return 1; |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to |
| 475 | operate on (ask user if necessary). |
| 476 | If CANONICAL is non-NULL return a corresponding array of mangled names |
| 477 | as canonical line specs there. */ |
| 478 | |
| 479 | static struct symtabs_and_lines |
| 480 | decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline, |
| 481 | char ***canonical) |
| 482 | { |
| 483 | struct symtabs_and_lines values, return_values; |
| 484 | char *args, *arg1; |
| 485 | int i; |
| 486 | char *prompt; |
| 487 | char *symname; |
| 488 | struct cleanup *old_chain; |
| 489 | char **canonical_arr = (char **) NULL; |
| 490 | const char *select_mode = multiple_symbols_select_mode (); |
| 491 | |
| 492 | if (select_mode == multiple_symbols_cancel) |
| 493 | error (_("\ |
| 494 | canceled because the command is ambiguous\n\ |
| 495 | See set/show multiple-symbol.")); |
| 496 | |
| 497 | values.sals = (struct symtab_and_line *) |
| 498 | alloca (nelts * sizeof (struct symtab_and_line)); |
| 499 | return_values.sals = (struct symtab_and_line *) |
| 500 | xmalloc (nelts * sizeof (struct symtab_and_line)); |
| 501 | old_chain = make_cleanup (xfree, return_values.sals); |
| 502 | |
| 503 | if (canonical) |
| 504 | { |
| 505 | canonical_arr = (char **) xmalloc (nelts * sizeof (char *)); |
| 506 | make_cleanup (xfree, canonical_arr); |
| 507 | memset (canonical_arr, 0, nelts * sizeof (char *)); |
| 508 | *canonical = canonical_arr; |
| 509 | } |
| 510 | |
| 511 | i = 0; |
| 512 | while (i < nelts) |
| 513 | { |
| 514 | init_sal (&return_values.sals[i]); /* Initialize to zeroes. */ |
| 515 | init_sal (&values.sals[i]); |
| 516 | if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) |
| 517 | values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline); |
| 518 | i++; |
| 519 | } |
| 520 | |
| 521 | /* If select_mode is "all", then do not print the multiple-choice |
| 522 | menu and act as if the user had chosen choice "1" (all). */ |
| 523 | if (select_mode == multiple_symbols_all |
| 524 | || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))) |
| 525 | args = "1"; |
| 526 | else |
| 527 | { |
| 528 | i = 0; |
| 529 | printf_unfiltered (_("[0] cancel\n[1] all\n")); |
| 530 | while (i < nelts) |
| 531 | { |
| 532 | if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) |
| 533 | { |
| 534 | if (values.sals[i].symtab) |
| 535 | printf_unfiltered ("[%d] %s at %s:%d\n", |
| 536 | (i + 2), |
| 537 | SYMBOL_PRINT_NAME (sym_arr[i]), |
| 538 | values.sals[i].symtab->filename, |
| 539 | values.sals[i].line); |
| 540 | else |
| 541 | printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"), |
| 542 | (i + 2), |
| 543 | SYMBOL_PRINT_NAME (sym_arr[i]), |
| 544 | values.sals[i].line); |
| 545 | |
| 546 | } |
| 547 | else |
| 548 | printf_unfiltered (_("?HERE\n")); |
| 549 | i++; |
| 550 | } |
| 551 | |
| 552 | prompt = getenv ("PS2"); |
| 553 | if (prompt == NULL) |
| 554 | { |
| 555 | prompt = "> "; |
| 556 | } |
| 557 | args = command_line_input (prompt, 0, "overload-choice"); |
| 558 | } |
| 559 | |
| 560 | if (args == 0 || *args == 0) |
| 561 | error_no_arg (_("one or more choice numbers")); |
| 562 | |
| 563 | i = 0; |
| 564 | while (*args) |
| 565 | { |
| 566 | int num; |
| 567 | |
| 568 | arg1 = args; |
| 569 | while (*arg1 >= '0' && *arg1 <= '9') |
| 570 | arg1++; |
| 571 | if (*arg1 && *arg1 != ' ' && *arg1 != '\t') |
| 572 | error (_("Arguments must be choice numbers.")); |
| 573 | |
| 574 | num = atoi (args); |
| 575 | |
| 576 | if (num == 0) |
| 577 | error (_("canceled")); |
| 578 | else if (num == 1) |
| 579 | { |
| 580 | if (canonical_arr) |
| 581 | { |
| 582 | for (i = 0; i < nelts; i++) |
| 583 | { |
| 584 | if (canonical_arr[i] == NULL) |
| 585 | { |
| 586 | symname = SYMBOL_LINKAGE_NAME (sym_arr[i]); |
| 587 | canonical_arr[i] = xstrdup (symname); |
| 588 | } |
| 589 | } |
| 590 | } |
| 591 | memcpy (return_values.sals, values.sals, |
| 592 | (nelts * sizeof (struct symtab_and_line))); |
| 593 | return_values.nelts = nelts; |
| 594 | discard_cleanups (old_chain); |
| 595 | return return_values; |
| 596 | } |
| 597 | |
| 598 | if (num >= nelts + 2) |
| 599 | { |
| 600 | printf_unfiltered (_("No choice number %d.\n"), num); |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | num -= 2; |
| 605 | if (values.sals[num].pc) |
| 606 | { |
| 607 | if (canonical_arr) |
| 608 | { |
| 609 | symname = SYMBOL_LINKAGE_NAME (sym_arr[num]); |
| 610 | make_cleanup (xfree, symname); |
| 611 | canonical_arr[i] = xstrdup (symname); |
| 612 | } |
| 613 | return_values.sals[i++] = values.sals[num]; |
| 614 | values.sals[num].pc = 0; |
| 615 | } |
| 616 | else |
| 617 | { |
| 618 | printf_unfiltered (_("duplicate request for %d ignored.\n"), num); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | args = arg1; |
| 623 | while (*args == ' ' || *args == '\t') |
| 624 | args++; |
| 625 | } |
| 626 | return_values.nelts = i; |
| 627 | discard_cleanups (old_chain); |
| 628 | return return_values; |
| 629 | } |
| 630 | \f |
| 631 | /* The parser of linespec itself. */ |
| 632 | |
| 633 | /* Parse a string that specifies a line number. |
| 634 | Pass the address of a char * variable; that variable will be |
| 635 | advanced over the characters actually parsed. |
| 636 | |
| 637 | The string can be: |
| 638 | |
| 639 | LINENUM -- that line number in current file. PC returned is 0. |
| 640 | FILE:LINENUM -- that line in that file. PC returned is 0. |
| 641 | FUNCTION -- line number of openbrace of that function. |
| 642 | PC returned is the start of the function. |
| 643 | VARIABLE -- line number of definition of that variable. |
| 644 | PC returned is 0. |
| 645 | FILE:FUNCTION -- likewise, but prefer functions in that file. |
| 646 | *EXPR -- line in which address EXPR appears. |
| 647 | |
| 648 | This may all be followed by an "if EXPR", which we ignore. |
| 649 | |
| 650 | FUNCTION may be an undebuggable function found in minimal symbol table. |
| 651 | |
| 652 | If the argument FUNFIRSTLINE is nonzero, we want the first line |
| 653 | of real code inside a function when a function is specified, and it is |
| 654 | not OK to specify a variable or type to get its line number. |
| 655 | |
| 656 | DEFAULT_SYMTAB specifies the file to use if none is specified. |
| 657 | It defaults to current_source_symtab. |
| 658 | DEFAULT_LINE specifies the line number to use for relative |
| 659 | line numbers (that start with signs). Defaults to current_source_line. |
| 660 | If CANONICAL is non-NULL, store an array of strings containing the canonical |
| 661 | line specs there if necessary. Currently overloaded member functions and |
| 662 | line numbers or static functions without a filename yield a canonical |
| 663 | line spec. The array and the line spec strings are allocated on the heap, |
| 664 | it is the callers responsibility to free them. |
| 665 | |
| 666 | Note that it is possible to return zero for the symtab |
| 667 | if no file is validly specified. Callers must check that. |
| 668 | Also, the line number returned may be invalid. |
| 669 | |
| 670 | If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based |
| 671 | on whether or not failure occurs due to an unknown function or file. In the case |
| 672 | where failure does occur due to an unknown function or file, do not issue an error |
| 673 | message. */ |
| 674 | |
| 675 | /* We allow single quotes in various places. This is a hideous |
| 676 | kludge, which exists because the completer can't yet deal with the |
| 677 | lack of single quotes. FIXME: write a linespec_completer which we |
| 678 | can use as appropriate instead of make_symbol_completion_list. */ |
| 679 | |
| 680 | struct symtabs_and_lines |
| 681 | decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, |
| 682 | int default_line, char ***canonical, int *not_found_ptr) |
| 683 | { |
| 684 | char *p; |
| 685 | char *q; |
| 686 | /* If a file name is specified, this is its symtab. */ |
| 687 | struct symtab *file_symtab = NULL; |
| 688 | |
| 689 | char *copy; |
| 690 | /* This is NULL if there are no parens in *ARGPTR, or a pointer to |
| 691 | the closing parenthesis if there are parens. */ |
| 692 | char *paren_pointer; |
| 693 | /* This says whether or not something in *ARGPTR is quoted with |
| 694 | completer_quotes (i.e. with single quotes). */ |
| 695 | int is_quoted; |
| 696 | /* Is part of *ARGPTR is enclosed in double quotes? */ |
| 697 | int is_quote_enclosed; |
| 698 | int is_objc_method = 0; |
| 699 | char *saved_arg = *argptr; |
| 700 | |
| 701 | if (not_found_ptr) |
| 702 | *not_found_ptr = 0; |
| 703 | |
| 704 | /* Defaults have defaults. */ |
| 705 | |
| 706 | initialize_defaults (&default_symtab, &default_line); |
| 707 | |
| 708 | /* See if arg is *PC. */ |
| 709 | |
| 710 | if (**argptr == '*') |
| 711 | return decode_indirect (argptr); |
| 712 | |
| 713 | /* Set various flags. 'paren_pointer' is important for overload |
| 714 | checking, where we allow things like: |
| 715 | (gdb) break c::f(int) |
| 716 | */ |
| 717 | |
| 718 | set_flags (*argptr, &is_quoted, &paren_pointer); |
| 719 | |
| 720 | /* Check to see if it's a multipart linespec (with colons or |
| 721 | periods). */ |
| 722 | |
| 723 | /* Locate the end of the first half of the linespec. |
| 724 | After the call, for instance, if the argptr string is "foo.c:123" |
| 725 | p will point at "123". If there is only one part, like "foo", p |
| 726 | will point to "". If this is a C++ name, like "A::B::foo", p will |
| 727 | point to "::B::foo". Argptr is not changed by this call. */ |
| 728 | |
| 729 | p = locate_first_half (argptr, &is_quote_enclosed); |
| 730 | |
| 731 | /* Check if this is an Objective-C method (anything that starts with |
| 732 | a '+' or '-' and a '['). */ |
| 733 | if (is_objc_method_format (p)) |
| 734 | { |
| 735 | is_objc_method = 1; |
| 736 | paren_pointer = NULL; /* Just a category name. Ignore it. */ |
| 737 | } |
| 738 | |
| 739 | /* Check if the symbol could be an Objective-C selector. */ |
| 740 | |
| 741 | { |
| 742 | struct symtabs_and_lines values; |
| 743 | values = decode_objc (argptr, funfirstline, NULL, |
| 744 | canonical, saved_arg); |
| 745 | if (values.sals != NULL) |
| 746 | return values; |
| 747 | } |
| 748 | |
| 749 | /* Does it look like there actually were two parts? */ |
| 750 | |
| 751 | if ((p[0] == ':' || p[0] == '.') && paren_pointer == NULL) |
| 752 | { |
| 753 | if (is_quoted) |
| 754 | *argptr = *argptr + 1; |
| 755 | |
| 756 | /* Is it a C++ or Java compound data structure? |
| 757 | The check on p[1] == ':' is capturing the case of "::", |
| 758 | since p[0]==':' was checked above. |
| 759 | Note that the call to decode_compound does everything |
| 760 | for us, including the lookup on the symbol table, so we |
| 761 | can return now. */ |
| 762 | |
| 763 | if (p[0] == '.' || p[1] == ':') |
| 764 | return decode_compound (argptr, funfirstline, canonical, |
| 765 | saved_arg, p, not_found_ptr); |
| 766 | |
| 767 | /* No, the first part is a filename; set file_symtab to be that file's |
| 768 | symtab. Also, move argptr past the filename. */ |
| 769 | |
| 770 | file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed, |
| 771 | not_found_ptr); |
| 772 | } |
| 773 | #if 0 |
| 774 | /* No one really seems to know why this was added. It certainly |
| 775 | breaks the command line, though, whenever the passed |
| 776 | name is of the form ClassName::Method. This bit of code |
| 777 | singles out the class name, and if funfirstline is set (for |
| 778 | example, you are setting a breakpoint at this function), |
| 779 | you get an error. This did not occur with earlier |
| 780 | verions, so I am ifdef'ing this out. 3/29/99 */ |
| 781 | else |
| 782 | { |
| 783 | /* Check if what we have till now is a symbol name */ |
| 784 | |
| 785 | /* We may be looking at a template instantiation such |
| 786 | as "foo<int>". Check here whether we know about it, |
| 787 | instead of falling through to the code below which |
| 788 | handles ordinary function names, because that code |
| 789 | doesn't like seeing '<' and '>' in a name -- the |
| 790 | skip_quoted call doesn't go past them. So see if we |
| 791 | can figure it out right now. */ |
| 792 | |
| 793 | copy = (char *) alloca (p - *argptr + 1); |
| 794 | memcpy (copy, *argptr, p - *argptr); |
| 795 | copy[p - *argptr] = '\000'; |
| 796 | sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0); |
| 797 | if (sym) |
| 798 | { |
| 799 | *argptr = (*p == '\'') ? p + 1 : p; |
| 800 | return symbol_found (funfirstline, canonical, copy, sym, NULL); |
| 801 | } |
| 802 | /* Otherwise fall out from here and go to file/line spec |
| 803 | processing, etc. */ |
| 804 | } |
| 805 | #endif |
| 806 | |
| 807 | /* file_symtab is specified file's symtab, or 0 if no file specified. |
| 808 | arg no longer contains the file name. */ |
| 809 | |
| 810 | /* Check whether arg is all digits (and sign). */ |
| 811 | |
| 812 | q = *argptr; |
| 813 | if (*q == '-' || *q == '+') |
| 814 | q++; |
| 815 | while (*q >= '0' && *q <= '9') |
| 816 | q++; |
| 817 | |
| 818 | if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')) |
| 819 | /* We found a token consisting of all digits -- at least one digit. */ |
| 820 | return decode_all_digits (argptr, default_symtab, default_line, |
| 821 | canonical, file_symtab, q); |
| 822 | |
| 823 | /* Arg token is not digits => try it as a variable name |
| 824 | Find the next token (everything up to end or next whitespace). */ |
| 825 | |
| 826 | if (**argptr == '$') /* May be a convenience variable. */ |
| 827 | /* One or two $ chars possible. */ |
| 828 | p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); |
| 829 | else if (is_quoted) |
| 830 | { |
| 831 | p = skip_quoted (*argptr); |
| 832 | if (p[-1] != '\'') |
| 833 | error (_("Unmatched single quote.")); |
| 834 | } |
| 835 | else if (is_objc_method) |
| 836 | { |
| 837 | /* allow word separators in method names for Obj-C */ |
| 838 | p = skip_quoted_chars (*argptr, NULL, ""); |
| 839 | } |
| 840 | else if (paren_pointer != NULL) |
| 841 | { |
| 842 | p = paren_pointer + 1; |
| 843 | } |
| 844 | else |
| 845 | { |
| 846 | p = skip_quoted (*argptr); |
| 847 | } |
| 848 | |
| 849 | /* Keep any template parameters */ |
| 850 | if (*p == '<') |
| 851 | p = find_template_name_end (p); |
| 852 | |
| 853 | copy = (char *) alloca (p - *argptr + 1); |
| 854 | memcpy (copy, *argptr, p - *argptr); |
| 855 | copy[p - *argptr] = '\0'; |
| 856 | if (p != *argptr |
| 857 | && copy[0] |
| 858 | && copy[0] == copy[p - *argptr - 1] |
| 859 | && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL) |
| 860 | { |
| 861 | copy[p - *argptr - 1] = '\0'; |
| 862 | copy++; |
| 863 | } |
| 864 | while (*p == ' ' || *p == '\t') |
| 865 | p++; |
| 866 | *argptr = p; |
| 867 | |
| 868 | /* If it starts with $: may be a legitimate variable or routine name |
| 869 | (e.g. HP-UX millicode routines such as $$dyncall), or it may |
| 870 | be history value, or it may be a convenience variable. */ |
| 871 | |
| 872 | if (*copy == '$') |
| 873 | return decode_dollar (copy, funfirstline, default_symtab, |
| 874 | canonical, file_symtab); |
| 875 | |
| 876 | /* Look up that token as a variable. |
| 877 | If file specified, use that file's per-file block to start with. */ |
| 878 | |
| 879 | return decode_variable (copy, funfirstline, canonical, |
| 880 | file_symtab, not_found_ptr); |
| 881 | } |
| 882 | |
| 883 | \f |
| 884 | |
| 885 | /* Now, more helper functions for decode_line_1. Some conventions |
| 886 | that these functions follow: |
| 887 | |
| 888 | Decode_line_1 typically passes along some of its arguments or local |
| 889 | variables to the subfunctions. It passes the variables by |
| 890 | reference if they are modified by the subfunction, and by value |
| 891 | otherwise. |
| 892 | |
| 893 | Some of the functions have side effects that don't arise from |
| 894 | variables that are passed by reference. In particular, if a |
| 895 | function is passed ARGPTR as an argument, it modifies what ARGPTR |
| 896 | points to; typically, it advances *ARGPTR past whatever substring |
| 897 | it has just looked at. (If it doesn't modify *ARGPTR, then the |
| 898 | function gets passed *ARGPTR instead, which is then called ARG: see |
| 899 | set_flags, for example.) Also, functions that return a struct |
| 900 | symtabs_and_lines may modify CANONICAL, as in the description of |
| 901 | decode_line_1. |
| 902 | |
| 903 | If a function returns a struct symtabs_and_lines, then that struct |
| 904 | will immediately make its way up the call chain to be returned by |
| 905 | decode_line_1. In particular, all of the functions decode_XXX |
| 906 | calculate the appropriate struct symtabs_and_lines, under the |
| 907 | assumption that their argument is of the form XXX. */ |
| 908 | |
| 909 | /* First, some functions to initialize stuff at the beggining of the |
| 910 | function. */ |
| 911 | |
| 912 | static void |
| 913 | initialize_defaults (struct symtab **default_symtab, int *default_line) |
| 914 | { |
| 915 | if (*default_symtab == 0) |
| 916 | { |
| 917 | /* Use whatever we have for the default source line. We don't use |
| 918 | get_current_or_default_symtab_and_line as it can recurse and call |
| 919 | us back! */ |
| 920 | struct symtab_and_line cursal = |
| 921 | get_current_source_symtab_and_line (); |
| 922 | |
| 923 | *default_symtab = cursal.symtab; |
| 924 | *default_line = cursal.line; |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | static void |
| 929 | set_flags (char *arg, int *is_quoted, char **paren_pointer) |
| 930 | { |
| 931 | char *ii; |
| 932 | int has_if = 0; |
| 933 | |
| 934 | /* 'has_if' is for the syntax: |
| 935 | (gdb) break foo if (a==b) |
| 936 | */ |
| 937 | if ((ii = strstr (arg, " if ")) != NULL || |
| 938 | (ii = strstr (arg, "\tif ")) != NULL || |
| 939 | (ii = strstr (arg, " if\t")) != NULL || |
| 940 | (ii = strstr (arg, "\tif\t")) != NULL || |
| 941 | (ii = strstr (arg, " if(")) != NULL || |
| 942 | (ii = strstr (arg, "\tif( ")) != NULL) |
| 943 | has_if = 1; |
| 944 | /* Temporarily zap out "if (condition)" to not confuse the |
| 945 | parenthesis-checking code below. This is undone below. Do not |
| 946 | change ii!! */ |
| 947 | if (has_if) |
| 948 | { |
| 949 | *ii = '\0'; |
| 950 | } |
| 951 | |
| 952 | *is_quoted = (*arg |
| 953 | && strchr (get_gdb_completer_quote_characters (), |
| 954 | *arg) != NULL); |
| 955 | |
| 956 | *paren_pointer = strchr (arg, '('); |
| 957 | if (*paren_pointer != NULL) |
| 958 | *paren_pointer = strrchr (*paren_pointer, ')'); |
| 959 | |
| 960 | /* Now that we're safely past the paren_pointer check, put back " if |
| 961 | (condition)" so outer layers can see it. */ |
| 962 | if (has_if) |
| 963 | *ii = ' '; |
| 964 | } |
| 965 | |
| 966 | \f |
| 967 | |
| 968 | /* Decode arg of the form *PC. */ |
| 969 | |
| 970 | static struct symtabs_and_lines |
| 971 | decode_indirect (char **argptr) |
| 972 | { |
| 973 | struct symtabs_and_lines values; |
| 974 | CORE_ADDR pc; |
| 975 | |
| 976 | (*argptr)++; |
| 977 | pc = parse_and_eval_address_1 (argptr); |
| 978 | |
| 979 | values.sals = (struct symtab_and_line *) |
| 980 | xmalloc (sizeof (struct symtab_and_line)); |
| 981 | |
| 982 | values.nelts = 1; |
| 983 | values.sals[0] = find_pc_line (pc, 0); |
| 984 | values.sals[0].pc = pc; |
| 985 | values.sals[0].section = find_pc_overlay (pc); |
| 986 | values.sals[0].explicit_pc = 1; |
| 987 | |
| 988 | return values; |
| 989 | } |
| 990 | |
| 991 | \f |
| 992 | |
| 993 | /* Locate the first half of the linespec, ending in a colon, period, |
| 994 | or whitespace. (More or less.) Also, check to see if *ARGPTR is |
| 995 | enclosed in double quotes; if so, set is_quote_enclosed, advance |
| 996 | ARGPTR past that and zero out the trailing double quote. |
| 997 | If ARGPTR is just a simple name like "main", p will point to "" |
| 998 | at the end. */ |
| 999 | |
| 1000 | static char * |
| 1001 | locate_first_half (char **argptr, int *is_quote_enclosed) |
| 1002 | { |
| 1003 | char *ii; |
| 1004 | char *p, *p1; |
| 1005 | int has_comma; |
| 1006 | |
| 1007 | /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM |
| 1008 | and we must isolate the first half. Outer layers will call again later |
| 1009 | for the second half. |
| 1010 | |
| 1011 | Don't count commas that appear in argument lists of overloaded |
| 1012 | functions, or in quoted strings. It's stupid to go to this much |
| 1013 | trouble when the rest of the function is such an obvious roach hotel. */ |
| 1014 | ii = find_toplevel_char (*argptr, ','); |
| 1015 | has_comma = (ii != 0); |
| 1016 | |
| 1017 | /* Temporarily zap out second half to not confuse the code below. |
| 1018 | This is undone below. Do not change ii!! */ |
| 1019 | if (has_comma) |
| 1020 | { |
| 1021 | *ii = '\0'; |
| 1022 | } |
| 1023 | |
| 1024 | /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be |
| 1025 | CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore |
| 1026 | inside of <>. */ |
| 1027 | |
| 1028 | p = *argptr; |
| 1029 | if (p[0] == '"') |
| 1030 | { |
| 1031 | *is_quote_enclosed = 1; |
| 1032 | (*argptr)++; |
| 1033 | p++; |
| 1034 | } |
| 1035 | else |
| 1036 | *is_quote_enclosed = 0; |
| 1037 | for (; *p; p++) |
| 1038 | { |
| 1039 | if (p[0] == '<') |
| 1040 | { |
| 1041 | char *temp_end = find_template_name_end (p); |
| 1042 | if (!temp_end) |
| 1043 | error (_("malformed template specification in command")); |
| 1044 | p = temp_end; |
| 1045 | } |
| 1046 | /* Check for a colon and a plus or minus and a [ (which |
| 1047 | indicates an Objective-C method) */ |
| 1048 | if (is_objc_method_format (p)) |
| 1049 | { |
| 1050 | break; |
| 1051 | } |
| 1052 | /* Check for the end of the first half of the linespec. End of |
| 1053 | line, a tab, a double colon or the last single colon, or a |
| 1054 | space. But if enclosed in double quotes we do not break on |
| 1055 | enclosed spaces. */ |
| 1056 | if (!*p |
| 1057 | || p[0] == '\t' |
| 1058 | || ((p[0] == ':') |
| 1059 | && ((p[1] == ':') || (strchr (p + 1, ':') == NULL))) |
| 1060 | || ((p[0] == ' ') && !*is_quote_enclosed)) |
| 1061 | break; |
| 1062 | if (p[0] == '.' && strchr (p, ':') == NULL) |
| 1063 | { |
| 1064 | /* Java qualified method. Find the *last* '.', since the |
| 1065 | others are package qualifiers. */ |
| 1066 | for (p1 = p; *p1; p1++) |
| 1067 | { |
| 1068 | if (*p1 == '.') |
| 1069 | p = p1; |
| 1070 | } |
| 1071 | break; |
| 1072 | } |
| 1073 | } |
| 1074 | while (p[0] == ' ' || p[0] == '\t') |
| 1075 | p++; |
| 1076 | |
| 1077 | /* If the closing double quote was left at the end, remove it. */ |
| 1078 | if (*is_quote_enclosed) |
| 1079 | { |
| 1080 | char *closing_quote = strchr (p - 1, '"'); |
| 1081 | if (closing_quote && closing_quote[1] == '\0') |
| 1082 | *closing_quote = '\0'; |
| 1083 | } |
| 1084 | |
| 1085 | /* Now that we've safely parsed the first half, put back ',' so |
| 1086 | outer layers can see it. */ |
| 1087 | if (has_comma) |
| 1088 | *ii = ','; |
| 1089 | |
| 1090 | return p; |
| 1091 | } |
| 1092 | |
| 1093 | \f |
| 1094 | |
| 1095 | /* Here's where we recognise an Objective-C Selector. An Objective C |
| 1096 | selector may be implemented by more than one class, therefore it |
| 1097 | may represent more than one method/function. This gives us a |
| 1098 | situation somewhat analogous to C++ overloading. If there's more |
| 1099 | than one method that could represent the selector, then use some of |
| 1100 | the existing C++ code to let the user choose one. */ |
| 1101 | |
| 1102 | struct symtabs_and_lines |
| 1103 | decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab, |
| 1104 | char ***canonical, char *saved_arg) |
| 1105 | { |
| 1106 | struct symtabs_and_lines values; |
| 1107 | struct symbol **sym_arr = NULL; |
| 1108 | struct symbol *sym = NULL; |
| 1109 | char *copy = NULL; |
| 1110 | struct block *block = NULL; |
| 1111 | unsigned i1 = 0; |
| 1112 | unsigned i2 = 0; |
| 1113 | |
| 1114 | values.sals = NULL; |
| 1115 | values.nelts = 0; |
| 1116 | |
| 1117 | if (file_symtab != NULL) |
| 1118 | block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK); |
| 1119 | else |
| 1120 | { |
| 1121 | enum language save_language; |
| 1122 | |
| 1123 | /* get_selected_block can change the current language when there is |
| 1124 | no selected frame yet. */ |
| 1125 | save_language = current_language->la_language; |
| 1126 | block = get_selected_block (0); |
| 1127 | set_language (save_language); |
| 1128 | } |
| 1129 | |
| 1130 | copy = find_imps (file_symtab, block, *argptr, NULL, &i1, &i2); |
| 1131 | |
| 1132 | if (i1 > 0) |
| 1133 | { |
| 1134 | sym_arr = (struct symbol **) alloca ((i1 + 1) * sizeof (struct symbol *)); |
| 1135 | sym_arr[i1] = NULL; |
| 1136 | |
| 1137 | copy = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2); |
| 1138 | *argptr = copy; |
| 1139 | } |
| 1140 | |
| 1141 | /* i1 now represents the TOTAL number of matches found. |
| 1142 | i2 represents how many HIGH-LEVEL (struct symbol) matches, |
| 1143 | which will come first in the sym_arr array. Any low-level |
| 1144 | (minimal_symbol) matches will follow those. */ |
| 1145 | |
| 1146 | if (i1 == 1) |
| 1147 | { |
| 1148 | if (i2 > 0) |
| 1149 | { |
| 1150 | /* Already a struct symbol. */ |
| 1151 | sym = sym_arr[0]; |
| 1152 | } |
| 1153 | else |
| 1154 | { |
| 1155 | sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0])); |
| 1156 | if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]), SYMBOL_LINKAGE_NAME (sym)) != 0) |
| 1157 | { |
| 1158 | warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym)); |
| 1159 | sym = NULL; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | values.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); |
| 1164 | values.nelts = 1; |
| 1165 | |
| 1166 | if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 1167 | { |
| 1168 | /* Canonicalize this, so it remains resolved for dylib loads. */ |
| 1169 | values.sals[0] = find_function_start_sal (sym, funfirstline); |
| 1170 | build_canonical_line_spec (values.sals, SYMBOL_NATURAL_NAME (sym), canonical); |
| 1171 | } |
| 1172 | else |
| 1173 | { |
| 1174 | /* The only match was a non-debuggable symbol. */ |
| 1175 | values.sals[0].symtab = NULL; |
| 1176 | values.sals[0].line = 0; |
| 1177 | values.sals[0].end = 0; |
| 1178 | values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym_arr[0]); |
| 1179 | } |
| 1180 | return values; |
| 1181 | } |
| 1182 | |
| 1183 | if (i1 > 1) |
| 1184 | { |
| 1185 | /* More than one match. The user must choose one or more. */ |
| 1186 | return decode_line_2 (sym_arr, i2, funfirstline, canonical); |
| 1187 | } |
| 1188 | |
| 1189 | return values; |
| 1190 | } |
| 1191 | |
| 1192 | /* This handles C++ and Java compound data structures. P should point |
| 1193 | at the first component separator, i.e. double-colon or period. As |
| 1194 | an example, on entrance to this function we could have ARGPTR |
| 1195 | pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */ |
| 1196 | |
| 1197 | static struct symtabs_and_lines |
| 1198 | decode_compound (char **argptr, int funfirstline, char ***canonical, |
| 1199 | char *saved_arg, char *p, int *not_found_ptr) |
| 1200 | { |
| 1201 | struct symtabs_and_lines values; |
| 1202 | char *p2; |
| 1203 | char *saved_arg2 = *argptr; |
| 1204 | char *temp_end; |
| 1205 | struct symbol *sym; |
| 1206 | char *copy; |
| 1207 | struct symbol *sym_class; |
| 1208 | struct symbol **sym_arr; |
| 1209 | struct type *t; |
| 1210 | |
| 1211 | /* First check for "global" namespace specification, of the form |
| 1212 | "::foo". If found, skip over the colons and jump to normal |
| 1213 | symbol processing. I.e. the whole line specification starts with |
| 1214 | "::" (note the condition that *argptr == p). */ |
| 1215 | if (p[0] == ':' |
| 1216 | && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t'))) |
| 1217 | saved_arg2 += 2; |
| 1218 | |
| 1219 | /* Given our example "AAA::inA::fun", we have two cases to consider: |
| 1220 | |
| 1221 | 1) AAA::inA is the name of a class. In that case, presumably it |
| 1222 | has a method called "fun"; we then look up that method using |
| 1223 | find_method. |
| 1224 | |
| 1225 | 2) AAA::inA isn't the name of a class. In that case, either the |
| 1226 | user made a typo or AAA::inA is the name of a namespace. |
| 1227 | Either way, we just look up AAA::inA::fun with lookup_symbol. |
| 1228 | |
| 1229 | Thus, our first task is to find everything before the last set of |
| 1230 | double-colons and figure out if it's the name of a class. So we |
| 1231 | first loop through all of the double-colons. */ |
| 1232 | |
| 1233 | p2 = p; /* Save for restart. */ |
| 1234 | |
| 1235 | /* This is very messy. Following the example above we have now the |
| 1236 | following pointers: |
| 1237 | p -> "::inA::fun" |
| 1238 | argptr -> "AAA::inA::fun |
| 1239 | saved_arg -> "AAA::inA::fun |
| 1240 | saved_arg2 -> "AAA::inA::fun |
| 1241 | p2 -> "::inA::fun". */ |
| 1242 | |
| 1243 | /* In the loop below, with these strings, we'll make 2 passes, each |
| 1244 | is marked in comments.*/ |
| 1245 | |
| 1246 | while (1) |
| 1247 | { |
| 1248 | /* Move pointer up to next possible class/namespace token. */ |
| 1249 | |
| 1250 | p = p2 + 1; /* Restart with old value +1. */ |
| 1251 | |
| 1252 | /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun", |
| 1253 | i.e. if there is a double-colon, p will now point to the |
| 1254 | second colon. */ |
| 1255 | /* PASS2: p2->"::fun", p->":fun" */ |
| 1256 | |
| 1257 | /* Move pointer ahead to next double-colon. */ |
| 1258 | while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')) |
| 1259 | { |
| 1260 | if (p[0] == '<') |
| 1261 | { |
| 1262 | temp_end = find_template_name_end (p); |
| 1263 | if (!temp_end) |
| 1264 | error (_("malformed template specification in command")); |
| 1265 | p = temp_end; |
| 1266 | } |
| 1267 | /* Note that, since, at the start of this loop, p would be |
| 1268 | pointing to the second colon in a double-colon, we only |
| 1269 | satisfy the condition below if there is another |
| 1270 | double-colon to the right (after). I.e. there is another |
| 1271 | component that can be a class or a namespace. I.e, if at |
| 1272 | the beginning of this loop (PASS1), we had |
| 1273 | p->":inA::fun", we'll trigger this when p has been |
| 1274 | advanced to point to "::fun". */ |
| 1275 | /* PASS2: we will not trigger this. */ |
| 1276 | else if ((p[0] == ':') && (p[1] == ':')) |
| 1277 | break; /* Found double-colon. */ |
| 1278 | else |
| 1279 | /* PASS2: We'll keep getting here, until p->"", at which point |
| 1280 | we exit this loop. */ |
| 1281 | p++; |
| 1282 | } |
| 1283 | |
| 1284 | if (*p != ':') |
| 1285 | break; /* Out of the while (1). This would happen |
| 1286 | for instance if we have looked up |
| 1287 | unsuccessfully all the components of the |
| 1288 | string, and p->""(PASS2) */ |
| 1289 | |
| 1290 | /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e |
| 1291 | string ended). */ |
| 1292 | /* Save restart for next time around. */ |
| 1293 | p2 = p; |
| 1294 | /* Restore argptr as it was on entry to this function. */ |
| 1295 | *argptr = saved_arg2; |
| 1296 | /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun", |
| 1297 | p2->"::fun". */ |
| 1298 | |
| 1299 | /* All ready for next pass through the loop. */ |
| 1300 | } /* while (1) */ |
| 1301 | |
| 1302 | |
| 1303 | /* Start of lookup in the symbol tables. */ |
| 1304 | |
| 1305 | /* Lookup in the symbol table the substring between argptr and |
| 1306 | p. Note, this call changes the value of argptr. */ |
| 1307 | /* Before the call, argptr->"AAA::inA::fun", |
| 1308 | p->"", p2->"::fun". After the call: argptr->"fun", p, p2 |
| 1309 | unchanged. */ |
| 1310 | sym_class = lookup_prefix_sym (argptr, p2); |
| 1311 | |
| 1312 | /* If sym_class has been found, and if "AAA::inA" is a class, then |
| 1313 | we're in case 1 above. So we look up "fun" as a method of that |
| 1314 | class. */ |
| 1315 | if (sym_class && |
| 1316 | (t = check_typedef (SYMBOL_TYPE (sym_class)), |
| 1317 | (TYPE_CODE (t) == TYPE_CODE_STRUCT |
| 1318 | || TYPE_CODE (t) == TYPE_CODE_UNION))) |
| 1319 | { |
| 1320 | /* Arg token is not digits => try it as a function name. |
| 1321 | Find the next token (everything up to end or next |
| 1322 | blank). */ |
| 1323 | if (**argptr |
| 1324 | && strchr (get_gdb_completer_quote_characters (), |
| 1325 | **argptr) != NULL) |
| 1326 | { |
| 1327 | p = skip_quoted (*argptr); |
| 1328 | *argptr = *argptr + 1; |
| 1329 | } |
| 1330 | else |
| 1331 | { |
| 1332 | /* At this point argptr->"fun". */ |
| 1333 | p = *argptr; |
| 1334 | while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':') |
| 1335 | p++; |
| 1336 | /* At this point p->"". String ended. */ |
| 1337 | } |
| 1338 | |
| 1339 | /* Allocate our own copy of the substring between argptr and |
| 1340 | p. */ |
| 1341 | copy = (char *) alloca (p - *argptr + 1); |
| 1342 | memcpy (copy, *argptr, p - *argptr); |
| 1343 | copy[p - *argptr] = '\0'; |
| 1344 | if (p != *argptr |
| 1345 | && copy[p - *argptr - 1] |
| 1346 | && strchr (get_gdb_completer_quote_characters (), |
| 1347 | copy[p - *argptr - 1]) != NULL) |
| 1348 | copy[p - *argptr - 1] = '\0'; |
| 1349 | |
| 1350 | /* At this point copy->"fun", p->"" */ |
| 1351 | |
| 1352 | /* No line number may be specified. */ |
| 1353 | while (*p == ' ' || *p == '\t') |
| 1354 | p++; |
| 1355 | *argptr = p; |
| 1356 | /* At this point arptr->"". */ |
| 1357 | |
| 1358 | /* Look for copy as a method of sym_class. */ |
| 1359 | /* At this point copy->"fun", sym_class is "AAA:inA", |
| 1360 | saved_arg->"AAA::inA::fun". This concludes the scanning of |
| 1361 | the string for possible components matches. If we find it |
| 1362 | here, we return. If not, and we are at the and of the string, |
| 1363 | we'll lookup the whole string in the symbol tables. */ |
| 1364 | |
| 1365 | return find_method (funfirstline, canonical, saved_arg, |
| 1366 | copy, t, sym_class, not_found_ptr); |
| 1367 | |
| 1368 | } /* End if symbol found */ |
| 1369 | |
| 1370 | |
| 1371 | /* We couldn't find a class, so we're in case 2 above. We check the |
| 1372 | entire name as a symbol instead. */ |
| 1373 | |
| 1374 | copy = (char *) alloca (p - saved_arg2 + 1); |
| 1375 | memcpy (copy, saved_arg2, p - saved_arg2); |
| 1376 | /* Note: if is_quoted should be true, we snuff out quote here |
| 1377 | anyway. */ |
| 1378 | copy[p - saved_arg2] = '\000'; |
| 1379 | /* Set argptr to skip over the name. */ |
| 1380 | *argptr = (*p == '\'') ? p + 1 : p; |
| 1381 | |
| 1382 | /* Look up entire name */ |
| 1383 | sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0); |
| 1384 | if (sym) |
| 1385 | return symbol_found (funfirstline, canonical, copy, sym, NULL); |
| 1386 | |
| 1387 | /* Couldn't find any interpretation as classes/namespaces, so give |
| 1388 | up. The quotes are important if copy is empty. */ |
| 1389 | if (not_found_ptr) |
| 1390 | *not_found_ptr = 1; |
| 1391 | cplusplus_error (saved_arg, |
| 1392 | "Can't find member of namespace, class, struct, or union named \"%s\"\n", |
| 1393 | copy); |
| 1394 | } |
| 1395 | |
| 1396 | /* Next come some helper functions for decode_compound. */ |
| 1397 | |
| 1398 | /* Return the symbol corresponding to the substring of *ARGPTR ending |
| 1399 | at P, allowing whitespace. Also, advance *ARGPTR past the symbol |
| 1400 | name in question, the compound object separator ("::" or "."), and |
| 1401 | whitespace. Note that *ARGPTR is changed whether or not the |
| 1402 | lookup_symbol call finds anything (i.e we return NULL). As an |
| 1403 | example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */ |
| 1404 | |
| 1405 | static struct symbol * |
| 1406 | lookup_prefix_sym (char **argptr, char *p) |
| 1407 | { |
| 1408 | char *p1; |
| 1409 | char *copy; |
| 1410 | |
| 1411 | /* Extract the class name. */ |
| 1412 | p1 = p; |
| 1413 | while (p != *argptr && p[-1] == ' ') |
| 1414 | --p; |
| 1415 | copy = (char *) alloca (p - *argptr + 1); |
| 1416 | memcpy (copy, *argptr, p - *argptr); |
| 1417 | copy[p - *argptr] = 0; |
| 1418 | |
| 1419 | /* Discard the class name from the argptr. */ |
| 1420 | p = p1 + (p1[0] == ':' ? 2 : 1); |
| 1421 | while (*p == ' ' || *p == '\t') |
| 1422 | p++; |
| 1423 | *argptr = p; |
| 1424 | |
| 1425 | /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA", |
| 1426 | argptr->"inA::fun" */ |
| 1427 | |
| 1428 | return lookup_symbol (copy, 0, STRUCT_DOMAIN, 0); |
| 1429 | } |
| 1430 | |
| 1431 | /* This finds the method COPY in the class whose type is T and whose |
| 1432 | symbol is SYM_CLASS. */ |
| 1433 | |
| 1434 | static struct symtabs_and_lines |
| 1435 | find_method (int funfirstline, char ***canonical, char *saved_arg, |
| 1436 | char *copy, struct type *t, struct symbol *sym_class, int *not_found_ptr) |
| 1437 | { |
| 1438 | struct symtabs_and_lines values; |
| 1439 | struct symbol *sym = NULL; |
| 1440 | int i1; /* Counter for the symbol array. */ |
| 1441 | struct symbol **sym_arr = alloca (total_number_of_methods (t) |
| 1442 | * sizeof (struct symbol *)); |
| 1443 | |
| 1444 | /* Find all methods with a matching name, and put them in |
| 1445 | sym_arr. */ |
| 1446 | |
| 1447 | i1 = find_methods (t, copy, SYMBOL_LANGUAGE (sym_class), sym_arr); |
| 1448 | |
| 1449 | if (i1 == 1) |
| 1450 | { |
| 1451 | /* There is exactly one field with that name. */ |
| 1452 | sym = sym_arr[0]; |
| 1453 | |
| 1454 | if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 1455 | { |
| 1456 | values.sals = (struct symtab_and_line *) |
| 1457 | xmalloc (sizeof (struct symtab_and_line)); |
| 1458 | values.nelts = 1; |
| 1459 | values.sals[0] = find_function_start_sal (sym, |
| 1460 | funfirstline); |
| 1461 | } |
| 1462 | else |
| 1463 | { |
| 1464 | values.sals = NULL; |
| 1465 | values.nelts = 0; |
| 1466 | } |
| 1467 | return values; |
| 1468 | } |
| 1469 | if (i1 > 0) |
| 1470 | { |
| 1471 | /* There is more than one field with that name |
| 1472 | (overloaded). Ask the user which one to use. */ |
| 1473 | return decode_line_2 (sym_arr, i1, funfirstline, canonical); |
| 1474 | } |
| 1475 | else |
| 1476 | { |
| 1477 | char *tmp; |
| 1478 | |
| 1479 | if (is_operator_name (copy)) |
| 1480 | { |
| 1481 | tmp = (char *) alloca (strlen (copy + 3) + 9); |
| 1482 | strcpy (tmp, "operator "); |
| 1483 | strcat (tmp, copy + 3); |
| 1484 | } |
| 1485 | else |
| 1486 | tmp = copy; |
| 1487 | if (not_found_ptr) |
| 1488 | *not_found_ptr = 1; |
| 1489 | if (tmp[0] == '~') |
| 1490 | cplusplus_error (saved_arg, |
| 1491 | "the class `%s' does not have destructor defined\n", |
| 1492 | SYMBOL_PRINT_NAME (sym_class)); |
| 1493 | else |
| 1494 | cplusplus_error (saved_arg, |
| 1495 | "the class %s does not have any method named %s\n", |
| 1496 | SYMBOL_PRINT_NAME (sym_class), tmp); |
| 1497 | } |
| 1498 | } |
| 1499 | |
| 1500 | \f |
| 1501 | |
| 1502 | /* Return the symtab associated to the filename given by the substring |
| 1503 | of *ARGPTR ending at P, and advance ARGPTR past that filename. If |
| 1504 | NOT_FOUND_PTR is not null and the source file is not found, store |
| 1505 | boolean true at the location pointed to and do not issue an |
| 1506 | error message. */ |
| 1507 | |
| 1508 | static struct symtab * |
| 1509 | symtab_from_filename (char **argptr, char *p, int is_quote_enclosed, |
| 1510 | int *not_found_ptr) |
| 1511 | { |
| 1512 | char *p1; |
| 1513 | char *copy; |
| 1514 | struct symtab *file_symtab; |
| 1515 | |
| 1516 | p1 = p; |
| 1517 | while (p != *argptr && p[-1] == ' ') |
| 1518 | --p; |
| 1519 | if ((*p == '"') && is_quote_enclosed) |
| 1520 | --p; |
| 1521 | copy = (char *) alloca (p - *argptr + 1); |
| 1522 | memcpy (copy, *argptr, p - *argptr); |
| 1523 | /* It may have the ending quote right after the file name. */ |
| 1524 | if (is_quote_enclosed && copy[p - *argptr - 1] == '"') |
| 1525 | copy[p - *argptr - 1] = 0; |
| 1526 | else |
| 1527 | copy[p - *argptr] = 0; |
| 1528 | |
| 1529 | /* Find that file's data. */ |
| 1530 | file_symtab = lookup_symtab (copy); |
| 1531 | if (file_symtab == 0) |
| 1532 | { |
| 1533 | if (not_found_ptr) |
| 1534 | *not_found_ptr = 1; |
| 1535 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 1536 | throw_error (NOT_FOUND_ERROR, |
| 1537 | _("No symbol table is loaded. Use the \"file\" command.")); |
| 1538 | throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy); |
| 1539 | } |
| 1540 | |
| 1541 | /* Discard the file name from the arg. */ |
| 1542 | p = p1 + 1; |
| 1543 | while (*p == ' ' || *p == '\t') |
| 1544 | p++; |
| 1545 | *argptr = p; |
| 1546 | |
| 1547 | return file_symtab; |
| 1548 | } |
| 1549 | |
| 1550 | \f |
| 1551 | |
| 1552 | /* This decodes a line where the argument is all digits (possibly |
| 1553 | preceded by a sign). Q should point to the end of those digits; |
| 1554 | the other arguments are as usual. */ |
| 1555 | |
| 1556 | static struct symtabs_and_lines |
| 1557 | decode_all_digits (char **argptr, struct symtab *default_symtab, |
| 1558 | int default_line, char ***canonical, |
| 1559 | struct symtab *file_symtab, char *q) |
| 1560 | |
| 1561 | { |
| 1562 | struct symtabs_and_lines values; |
| 1563 | struct symtab_and_line val; |
| 1564 | |
| 1565 | enum sign |
| 1566 | { |
| 1567 | none, plus, minus |
| 1568 | } |
| 1569 | sign = none; |
| 1570 | |
| 1571 | /* We might need a canonical line spec if no file was specified. */ |
| 1572 | int need_canonical = (file_symtab == NULL) ? 1 : 0; |
| 1573 | |
| 1574 | init_sal (&val); |
| 1575 | |
| 1576 | /* This is where we need to make sure that we have good defaults. |
| 1577 | We must guarantee that this section of code is never executed |
| 1578 | when we are called with just a function name, since |
| 1579 | set_default_source_symtab_and_line uses |
| 1580 | select_source_symtab that calls us with such an argument. */ |
| 1581 | |
| 1582 | if (file_symtab == 0 && default_symtab == 0) |
| 1583 | { |
| 1584 | /* Make sure we have at least a default source file. */ |
| 1585 | set_default_source_symtab_and_line (); |
| 1586 | initialize_defaults (&default_symtab, &default_line); |
| 1587 | } |
| 1588 | |
| 1589 | if (**argptr == '+') |
| 1590 | sign = plus, (*argptr)++; |
| 1591 | else if (**argptr == '-') |
| 1592 | sign = minus, (*argptr)++; |
| 1593 | val.line = atoi (*argptr); |
| 1594 | switch (sign) |
| 1595 | { |
| 1596 | case plus: |
| 1597 | if (q == *argptr) |
| 1598 | val.line = 5; |
| 1599 | if (file_symtab == 0) |
| 1600 | val.line = default_line + val.line; |
| 1601 | break; |
| 1602 | case minus: |
| 1603 | if (q == *argptr) |
| 1604 | val.line = 15; |
| 1605 | if (file_symtab == 0) |
| 1606 | val.line = default_line - val.line; |
| 1607 | else |
| 1608 | val.line = 1; |
| 1609 | break; |
| 1610 | case none: |
| 1611 | break; /* No need to adjust val.line. */ |
| 1612 | } |
| 1613 | |
| 1614 | while (*q == ' ' || *q == '\t') |
| 1615 | q++; |
| 1616 | *argptr = q; |
| 1617 | if (file_symtab == 0) |
| 1618 | file_symtab = default_symtab; |
| 1619 | |
| 1620 | /* It is possible that this source file has more than one symtab, |
| 1621 | and that the new line number specification has moved us from the |
| 1622 | default (in file_symtab) to a new one. */ |
| 1623 | val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL); |
| 1624 | if (val.symtab == 0) |
| 1625 | val.symtab = file_symtab; |
| 1626 | |
| 1627 | val.pc = 0; |
| 1628 | values.sals = (struct symtab_and_line *) |
| 1629 | xmalloc (sizeof (struct symtab_and_line)); |
| 1630 | values.sals[0] = val; |
| 1631 | values.nelts = 1; |
| 1632 | if (need_canonical) |
| 1633 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 1634 | values.sals[0].explicit_line = 1; |
| 1635 | return values; |
| 1636 | } |
| 1637 | |
| 1638 | \f |
| 1639 | |
| 1640 | /* Decode a linespec starting with a dollar sign. */ |
| 1641 | |
| 1642 | static struct symtabs_and_lines |
| 1643 | decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab, |
| 1644 | char ***canonical, struct symtab *file_symtab) |
| 1645 | { |
| 1646 | LONGEST valx; |
| 1647 | int index = 0; |
| 1648 | int need_canonical = 0; |
| 1649 | struct symtabs_and_lines values; |
| 1650 | struct symtab_and_line val; |
| 1651 | char *p; |
| 1652 | struct symbol *sym; |
| 1653 | struct minimal_symbol *msymbol; |
| 1654 | |
| 1655 | p = (copy[1] == '$') ? copy + 2 : copy + 1; |
| 1656 | while (*p >= '0' && *p <= '9') |
| 1657 | p++; |
| 1658 | if (!*p) /* Reached end of token without hitting non-digit. */ |
| 1659 | { |
| 1660 | /* We have a value history reference. */ |
| 1661 | struct value *val_history; |
| 1662 | sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index); |
| 1663 | val_history = access_value_history ((copy[1] == '$') ? -index : index); |
| 1664 | if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT) |
| 1665 | error (_("History values used in line specs must have integer values.")); |
| 1666 | valx = value_as_long (val_history); |
| 1667 | } |
| 1668 | else |
| 1669 | { |
| 1670 | /* Not all digits -- may be user variable/function or a |
| 1671 | convenience variable. */ |
| 1672 | |
| 1673 | /* Look up entire name as a symbol first. */ |
| 1674 | sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0); |
| 1675 | file_symtab = (struct symtab *) NULL; |
| 1676 | need_canonical = 1; |
| 1677 | /* Symbol was found --> jump to normal symbol processing. */ |
| 1678 | if (sym) |
| 1679 | return symbol_found (funfirstline, canonical, copy, sym, NULL); |
| 1680 | |
| 1681 | /* If symbol was not found, look in minimal symbol tables. */ |
| 1682 | msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| 1683 | /* Min symbol was found --> jump to minsym processing. */ |
| 1684 | if (msymbol) |
| 1685 | return minsym_found (funfirstline, msymbol); |
| 1686 | |
| 1687 | /* Not a user variable or function -- must be convenience variable. */ |
| 1688 | if (!get_internalvar_integer (lookup_internalvar (copy + 1), &valx)) |
| 1689 | error (_("Convenience variables used in line specs must have integer values.")); |
| 1690 | } |
| 1691 | |
| 1692 | init_sal (&val); |
| 1693 | |
| 1694 | /* Either history value or convenience value from above, in valx. */ |
| 1695 | val.symtab = file_symtab ? file_symtab : default_symtab; |
| 1696 | val.line = valx; |
| 1697 | val.pc = 0; |
| 1698 | |
| 1699 | values.sals = (struct symtab_and_line *) xmalloc (sizeof val); |
| 1700 | values.sals[0] = val; |
| 1701 | values.nelts = 1; |
| 1702 | |
| 1703 | if (need_canonical) |
| 1704 | build_canonical_line_spec (values.sals, NULL, canonical); |
| 1705 | |
| 1706 | return values; |
| 1707 | } |
| 1708 | |
| 1709 | \f |
| 1710 | |
| 1711 | /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL, |
| 1712 | look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and |
| 1713 | the function cannot be found, store boolean true in the location pointed to |
| 1714 | and do not issue an error message. */ |
| 1715 | |
| 1716 | static struct symtabs_and_lines |
| 1717 | decode_variable (char *copy, int funfirstline, char ***canonical, |
| 1718 | struct symtab *file_symtab, int *not_found_ptr) |
| 1719 | { |
| 1720 | struct symbol *sym; |
| 1721 | |
| 1722 | struct minimal_symbol *msymbol; |
| 1723 | |
| 1724 | sym = lookup_symbol (copy, |
| 1725 | (file_symtab |
| 1726 | ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), |
| 1727 | STATIC_BLOCK) |
| 1728 | : get_selected_block (0)), |
| 1729 | VAR_DOMAIN, 0); |
| 1730 | |
| 1731 | if (sym != NULL) |
| 1732 | return symbol_found (funfirstline, canonical, copy, sym, file_symtab); |
| 1733 | |
| 1734 | msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| 1735 | |
| 1736 | if (msymbol != NULL) |
| 1737 | return minsym_found (funfirstline, msymbol); |
| 1738 | |
| 1739 | if (not_found_ptr) |
| 1740 | *not_found_ptr = 1; |
| 1741 | |
| 1742 | if (!have_full_symbols () |
| 1743 | && !have_partial_symbols () |
| 1744 | && !have_minimal_symbols ()) |
| 1745 | throw_error (NOT_FOUND_ERROR, |
| 1746 | _("No symbol table is loaded. Use the \"file\" command.")); |
| 1747 | throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy); |
| 1748 | } |
| 1749 | |
| 1750 | |
| 1751 | \f |
| 1752 | |
| 1753 | /* Now come some functions that are called from multiple places within |
| 1754 | decode_line_1. */ |
| 1755 | |
| 1756 | /* We've found a symbol SYM to associate with our linespec; build a |
| 1757 | corresponding struct symtabs_and_lines. */ |
| 1758 | |
| 1759 | static struct symtabs_and_lines |
| 1760 | symbol_found (int funfirstline, char ***canonical, char *copy, |
| 1761 | struct symbol *sym, struct symtab *file_symtab) |
| 1762 | { |
| 1763 | struct symtabs_and_lines values; |
| 1764 | |
| 1765 | if (SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 1766 | { |
| 1767 | /* Arg is the name of a function */ |
| 1768 | values.sals = (struct symtab_and_line *) |
| 1769 | xmalloc (sizeof (struct symtab_and_line)); |
| 1770 | values.sals[0] = find_function_start_sal (sym, funfirstline); |
| 1771 | values.nelts = 1; |
| 1772 | |
| 1773 | /* Don't use the SYMBOL_LINE; if used at all it points to |
| 1774 | the line containing the parameters or thereabouts, not |
| 1775 | the first line of code. */ |
| 1776 | |
| 1777 | /* We might need a canonical line spec if it is a static |
| 1778 | function. */ |
| 1779 | if (file_symtab == 0) |
| 1780 | { |
| 1781 | struct blockvector *bv = BLOCKVECTOR (SYMBOL_SYMTAB (sym)); |
| 1782 | struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| 1783 | if (lookup_block_symbol (b, copy, NULL, VAR_DOMAIN) != NULL) |
| 1784 | build_canonical_line_spec (values.sals, copy, canonical); |
| 1785 | } |
| 1786 | return values; |
| 1787 | } |
| 1788 | else |
| 1789 | { |
| 1790 | if (funfirstline) |
| 1791 | error (_("\"%s\" is not a function"), copy); |
| 1792 | else if (SYMBOL_LINE (sym) != 0) |
| 1793 | { |
| 1794 | /* We know its line number. */ |
| 1795 | values.sals = (struct symtab_and_line *) |
| 1796 | xmalloc (sizeof (struct symtab_and_line)); |
| 1797 | values.nelts = 1; |
| 1798 | memset (&values.sals[0], 0, sizeof (values.sals[0])); |
| 1799 | values.sals[0].symtab = SYMBOL_SYMTAB (sym); |
| 1800 | values.sals[0].line = SYMBOL_LINE (sym); |
| 1801 | return values; |
| 1802 | } |
| 1803 | else |
| 1804 | /* This can happen if it is compiled with a compiler which doesn't |
| 1805 | put out line numbers for variables. */ |
| 1806 | /* FIXME: Shouldn't we just set .line and .symtab to zero |
| 1807 | and return? For example, "info line foo" could print |
| 1808 | the address. */ |
| 1809 | error (_("Line number not known for symbol \"%s\""), copy); |
| 1810 | } |
| 1811 | } |
| 1812 | |
| 1813 | /* We've found a minimal symbol MSYMBOL to associate with our |
| 1814 | linespec; build a corresponding struct symtabs_and_lines. */ |
| 1815 | |
| 1816 | static struct symtabs_and_lines |
| 1817 | minsym_found (int funfirstline, struct minimal_symbol *msymbol) |
| 1818 | { |
| 1819 | struct objfile *objfile = msymbol_objfile (msymbol); |
| 1820 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 1821 | struct symtabs_and_lines values; |
| 1822 | CORE_ADDR pc; |
| 1823 | |
| 1824 | values.sals = (struct symtab_and_line *) |
| 1825 | xmalloc (sizeof (struct symtab_and_line)); |
| 1826 | values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol), |
| 1827 | (struct obj_section *) 0, 0); |
| 1828 | values.sals[0].section = SYMBOL_OBJ_SECTION (msymbol); |
| 1829 | |
| 1830 | /* The minimal symbol might point to a function descriptor; |
| 1831 | resolve it to the actual code address instead. */ |
| 1832 | pc = gdbarch_convert_from_func_ptr_addr (gdbarch, |
| 1833 | values.sals[0].pc, |
| 1834 | ¤t_target); |
| 1835 | if (pc != values.sals[0].pc) |
| 1836 | values.sals[0] = find_pc_sect_line (pc, NULL, 0); |
| 1837 | |
| 1838 | if (funfirstline) |
| 1839 | { |
| 1840 | struct symtab_and_line sal; |
| 1841 | |
| 1842 | values.sals[0].pc = find_function_start_pc (gdbarch, |
| 1843 | values.sals[0].pc, |
| 1844 | values.sals[0].section); |
| 1845 | |
| 1846 | sal = find_pc_sect_line (values.sals[0].pc, values.sals[0].section, 0); |
| 1847 | |
| 1848 | /* Check if SKIP_PROLOGUE left us in mid-line, and the next |
| 1849 | line is still part of the same function. If there is no |
| 1850 | line information here, sal.pc will be the passed in PC. */ |
| 1851 | if (sal.pc != values.sals[0].pc |
| 1852 | && (lookup_minimal_symbol_by_pc_section (values.sals[0].pc, |
| 1853 | values.sals[0].section) |
| 1854 | == lookup_minimal_symbol_by_pc_section (sal.end, |
| 1855 | values.sals[0].section))) |
| 1856 | /* Recalculate the line number (might not be N+1). */ |
| 1857 | values.sals[0] = find_pc_sect_line (sal.end, values.sals[0].section, 0); |
| 1858 | } |
| 1859 | |
| 1860 | values.nelts = 1; |
| 1861 | return values; |
| 1862 | } |