| 1 | /* Data structures and API for event locations in GDB. |
| 2 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "defs.h" |
| 20 | #include "gdb_assert.h" |
| 21 | #include "location.h" |
| 22 | #include "symtab.h" |
| 23 | #include "language.h" |
| 24 | #include "linespec.h" |
| 25 | #include "cli/cli-utils.h" |
| 26 | #include "probe.h" |
| 27 | |
| 28 | #include <ctype.h> |
| 29 | #include <string.h> |
| 30 | |
| 31 | /* An event location used to set a stop event in the inferior. |
| 32 | This structure is an amalgam of the various ways |
| 33 | to specify where a stop event should be set. */ |
| 34 | |
| 35 | struct event_location |
| 36 | { |
| 37 | /* The type of this breakpoint specification. */ |
| 38 | enum event_location_type type; |
| 39 | #define EL_TYPE(P) (P)->type |
| 40 | |
| 41 | union |
| 42 | { |
| 43 | /* A generic "this is a string specification" for a location. |
| 44 | This representation is used by both "normal" linespecs and |
| 45 | probes. */ |
| 46 | char *addr_string; |
| 47 | #define EL_LINESPEC(P) ((P)->u.addr_string) |
| 48 | #define EL_PROBE(P) ((P)->u.addr_string) |
| 49 | |
| 50 | /* An address in the inferior. */ |
| 51 | CORE_ADDR address; |
| 52 | #define EL_ADDRESS(P) (P)->u.address |
| 53 | |
| 54 | /* An explicit location. */ |
| 55 | struct explicit_location explicit_loc; |
| 56 | #define EL_EXPLICIT(P) (&((P)->u.explicit_loc)) |
| 57 | } u; |
| 58 | |
| 59 | /* Cached string representation of this location. This is used, e.g., to |
| 60 | save stop event locations to file. Malloc'd. */ |
| 61 | char *as_string; |
| 62 | #define EL_STRING(P) ((P)->as_string) |
| 63 | }; |
| 64 | |
| 65 | /* See description in location.h. */ |
| 66 | |
| 67 | enum event_location_type |
| 68 | event_location_type (const struct event_location *location) |
| 69 | { |
| 70 | return EL_TYPE (location); |
| 71 | } |
| 72 | |
| 73 | /* See description in location.h. */ |
| 74 | |
| 75 | void |
| 76 | initialize_explicit_location (struct explicit_location *explicit_loc) |
| 77 | { |
| 78 | memset (explicit_loc, 0, sizeof (struct explicit_location)); |
| 79 | explicit_loc->line_offset.sign = LINE_OFFSET_UNKNOWN; |
| 80 | } |
| 81 | |
| 82 | /* See description in location.h. */ |
| 83 | |
| 84 | struct event_location * |
| 85 | new_linespec_location (char **linespec) |
| 86 | { |
| 87 | struct event_location *location; |
| 88 | |
| 89 | location = XCNEW (struct event_location); |
| 90 | EL_TYPE (location) = LINESPEC_LOCATION; |
| 91 | if (*linespec != NULL) |
| 92 | { |
| 93 | char *p; |
| 94 | char *orig = *linespec; |
| 95 | |
| 96 | linespec_lex_to_end (linespec); |
| 97 | p = remove_trailing_whitespace (orig, *linespec); |
| 98 | if ((p - orig) > 0) |
| 99 | EL_LINESPEC (location) = savestring (orig, p - orig); |
| 100 | } |
| 101 | return location; |
| 102 | } |
| 103 | |
| 104 | /* See description in location.h. */ |
| 105 | |
| 106 | const char * |
| 107 | get_linespec_location (const struct event_location *location) |
| 108 | { |
| 109 | gdb_assert (EL_TYPE (location) == LINESPEC_LOCATION); |
| 110 | return EL_LINESPEC (location); |
| 111 | } |
| 112 | |
| 113 | /* See description in location.h. */ |
| 114 | |
| 115 | struct event_location * |
| 116 | new_address_location (CORE_ADDR addr, const char *addr_string, |
| 117 | int addr_string_len) |
| 118 | { |
| 119 | struct event_location *location; |
| 120 | |
| 121 | location = XCNEW (struct event_location); |
| 122 | EL_TYPE (location) = ADDRESS_LOCATION; |
| 123 | EL_ADDRESS (location) = addr; |
| 124 | if (addr_string != NULL) |
| 125 | EL_STRING (location) = xstrndup (addr_string, addr_string_len); |
| 126 | return location; |
| 127 | } |
| 128 | |
| 129 | /* See description in location.h. */ |
| 130 | |
| 131 | CORE_ADDR |
| 132 | get_address_location (const struct event_location *location) |
| 133 | { |
| 134 | gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION); |
| 135 | return EL_ADDRESS (location); |
| 136 | } |
| 137 | |
| 138 | /* See description in location.h. */ |
| 139 | |
| 140 | const char * |
| 141 | get_address_string_location (const struct event_location *location) |
| 142 | { |
| 143 | gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION); |
| 144 | return EL_STRING (location); |
| 145 | } |
| 146 | |
| 147 | /* See description in location.h. */ |
| 148 | |
| 149 | struct event_location * |
| 150 | new_probe_location (const char *probe) |
| 151 | { |
| 152 | struct event_location *location; |
| 153 | |
| 154 | location = XCNEW (struct event_location); |
| 155 | EL_TYPE (location) = PROBE_LOCATION; |
| 156 | if (probe != NULL) |
| 157 | EL_PROBE (location) = xstrdup (probe); |
| 158 | return location; |
| 159 | } |
| 160 | |
| 161 | /* See description in location.h. */ |
| 162 | |
| 163 | const char * |
| 164 | get_probe_location (const struct event_location *location) |
| 165 | { |
| 166 | gdb_assert (EL_TYPE (location) == PROBE_LOCATION); |
| 167 | return EL_PROBE (location); |
| 168 | } |
| 169 | |
| 170 | /* See description in location.h. */ |
| 171 | |
| 172 | struct event_location * |
| 173 | new_explicit_location (const struct explicit_location *explicit_loc) |
| 174 | { |
| 175 | struct event_location tmp; |
| 176 | |
| 177 | memset (&tmp, 0, sizeof (struct event_location)); |
| 178 | EL_TYPE (&tmp) = EXPLICIT_LOCATION; |
| 179 | initialize_explicit_location (EL_EXPLICIT (&tmp)); |
| 180 | if (explicit_loc != NULL) |
| 181 | { |
| 182 | if (explicit_loc->source_filename != NULL) |
| 183 | { |
| 184 | EL_EXPLICIT (&tmp)->source_filename |
| 185 | = explicit_loc->source_filename; |
| 186 | } |
| 187 | |
| 188 | if (explicit_loc->function_name != NULL) |
| 189 | EL_EXPLICIT (&tmp)->function_name |
| 190 | = explicit_loc->function_name; |
| 191 | |
| 192 | if (explicit_loc->label_name != NULL) |
| 193 | EL_EXPLICIT (&tmp)->label_name = explicit_loc->label_name; |
| 194 | |
| 195 | if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN) |
| 196 | EL_EXPLICIT (&tmp)->line_offset = explicit_loc->line_offset; |
| 197 | } |
| 198 | |
| 199 | return copy_event_location (&tmp); |
| 200 | } |
| 201 | |
| 202 | /* See description in location.h. */ |
| 203 | |
| 204 | struct explicit_location * |
| 205 | get_explicit_location (struct event_location *location) |
| 206 | { |
| 207 | gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION); |
| 208 | return EL_EXPLICIT (location); |
| 209 | } |
| 210 | |
| 211 | /* See description in location.h. */ |
| 212 | |
| 213 | const struct explicit_location * |
| 214 | get_explicit_location_const (const struct event_location *location) |
| 215 | { |
| 216 | gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION); |
| 217 | return EL_EXPLICIT (location); |
| 218 | } |
| 219 | |
| 220 | /* This convenience function returns a malloc'd string which |
| 221 | represents the location in EXPLICIT_LOC. |
| 222 | |
| 223 | AS_LINESPEC is non-zero if this string should be a linespec. |
| 224 | Otherwise it will be output in explicit form. */ |
| 225 | |
| 226 | static char * |
| 227 | explicit_to_string_internal (int as_linespec, |
| 228 | const struct explicit_location *explicit_loc) |
| 229 | { |
| 230 | struct ui_file *buf; |
| 231 | char space, *result; |
| 232 | int need_space = 0; |
| 233 | struct cleanup *cleanup; |
| 234 | |
| 235 | space = as_linespec ? ':' : ' '; |
| 236 | buf = mem_fileopen (); |
| 237 | cleanup = make_cleanup_ui_file_delete (buf); |
| 238 | |
| 239 | if (explicit_loc->source_filename != NULL) |
| 240 | { |
| 241 | if (!as_linespec) |
| 242 | fputs_unfiltered ("-source ", buf); |
| 243 | fputs_unfiltered (explicit_loc->source_filename, buf); |
| 244 | need_space = 1; |
| 245 | } |
| 246 | |
| 247 | if (explicit_loc->function_name != NULL) |
| 248 | { |
| 249 | if (need_space) |
| 250 | fputc_unfiltered (space, buf); |
| 251 | if (!as_linespec) |
| 252 | fputs_unfiltered ("-function ", buf); |
| 253 | fputs_unfiltered (explicit_loc->function_name, buf); |
| 254 | need_space = 1; |
| 255 | } |
| 256 | |
| 257 | if (explicit_loc->label_name != NULL) |
| 258 | { |
| 259 | if (need_space) |
| 260 | fputc_unfiltered (space, buf); |
| 261 | if (!as_linespec) |
| 262 | fputs_unfiltered ("-label ", buf); |
| 263 | fputs_unfiltered (explicit_loc->label_name, buf); |
| 264 | need_space = 1; |
| 265 | } |
| 266 | |
| 267 | if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN) |
| 268 | { |
| 269 | if (need_space) |
| 270 | fputc_unfiltered (space, buf); |
| 271 | if (!as_linespec) |
| 272 | fputs_unfiltered ("-line ", buf); |
| 273 | fprintf_filtered (buf, "%s%d", |
| 274 | (explicit_loc->line_offset.sign == LINE_OFFSET_NONE ? "" |
| 275 | : (explicit_loc->line_offset.sign |
| 276 | == LINE_OFFSET_PLUS ? "+" : "-")), |
| 277 | explicit_loc->line_offset.offset); |
| 278 | } |
| 279 | |
| 280 | result = ui_file_xstrdup (buf, NULL); |
| 281 | do_cleanups (cleanup); |
| 282 | return result; |
| 283 | } |
| 284 | |
| 285 | /* See description in location.h. */ |
| 286 | |
| 287 | char * |
| 288 | explicit_location_to_string (const struct explicit_location *explicit_loc) |
| 289 | { |
| 290 | return explicit_to_string_internal (0, explicit_loc); |
| 291 | } |
| 292 | |
| 293 | /* See description in location.h. */ |
| 294 | |
| 295 | char * |
| 296 | explicit_location_to_linespec (const struct explicit_location *explicit_loc) |
| 297 | { |
| 298 | return explicit_to_string_internal (1, explicit_loc); |
| 299 | } |
| 300 | |
| 301 | /* See description in location.h. */ |
| 302 | |
| 303 | struct event_location * |
| 304 | copy_event_location (const struct event_location *src) |
| 305 | { |
| 306 | struct event_location *dst; |
| 307 | |
| 308 | dst = XCNEW (struct event_location); |
| 309 | EL_TYPE (dst) = EL_TYPE (src); |
| 310 | if (EL_STRING (src) != NULL) |
| 311 | EL_STRING (dst) = xstrdup (EL_STRING (src)); |
| 312 | |
| 313 | switch (EL_TYPE (src)) |
| 314 | { |
| 315 | case LINESPEC_LOCATION: |
| 316 | if (EL_LINESPEC (src) != NULL) |
| 317 | EL_LINESPEC (dst) = xstrdup (EL_LINESPEC (src)); |
| 318 | break; |
| 319 | |
| 320 | case ADDRESS_LOCATION: |
| 321 | EL_ADDRESS (dst) = EL_ADDRESS (src); |
| 322 | break; |
| 323 | |
| 324 | case EXPLICIT_LOCATION: |
| 325 | if (EL_EXPLICIT (src)->source_filename != NULL) |
| 326 | EL_EXPLICIT (dst)->source_filename |
| 327 | = xstrdup (EL_EXPLICIT (src)->source_filename); |
| 328 | |
| 329 | if (EL_EXPLICIT (src)->function_name != NULL) |
| 330 | EL_EXPLICIT (dst)->function_name |
| 331 | = xstrdup (EL_EXPLICIT (src)->function_name); |
| 332 | |
| 333 | if (EL_EXPLICIT (src)->label_name != NULL) |
| 334 | EL_EXPLICIT (dst)->label_name = xstrdup (EL_EXPLICIT (src)->label_name); |
| 335 | |
| 336 | EL_EXPLICIT (dst)->line_offset = EL_EXPLICIT (src)->line_offset; |
| 337 | break; |
| 338 | |
| 339 | |
| 340 | case PROBE_LOCATION: |
| 341 | if (EL_PROBE (src) != NULL) |
| 342 | EL_PROBE (dst) = xstrdup (EL_PROBE (src)); |
| 343 | break; |
| 344 | |
| 345 | default: |
| 346 | gdb_assert_not_reached ("unknown event location type"); |
| 347 | } |
| 348 | |
| 349 | return dst; |
| 350 | } |
| 351 | |
| 352 | /* A cleanup function for struct event_location. */ |
| 353 | |
| 354 | static void |
| 355 | delete_event_location_cleanup (void *data) |
| 356 | { |
| 357 | struct event_location *location = (struct event_location *) data; |
| 358 | |
| 359 | delete_event_location (location); |
| 360 | } |
| 361 | |
| 362 | /* See description in location.h. */ |
| 363 | |
| 364 | struct cleanup * |
| 365 | make_cleanup_delete_event_location (struct event_location *location) |
| 366 | { |
| 367 | return make_cleanup (delete_event_location_cleanup, location); |
| 368 | } |
| 369 | |
| 370 | /* See description in location.h. */ |
| 371 | |
| 372 | void |
| 373 | delete_event_location (struct event_location *location) |
| 374 | { |
| 375 | if (location != NULL) |
| 376 | { |
| 377 | xfree (EL_STRING (location)); |
| 378 | |
| 379 | switch (EL_TYPE (location)) |
| 380 | { |
| 381 | case LINESPEC_LOCATION: |
| 382 | xfree (EL_LINESPEC (location)); |
| 383 | break; |
| 384 | |
| 385 | case ADDRESS_LOCATION: |
| 386 | /* Nothing to do. */ |
| 387 | break; |
| 388 | |
| 389 | case EXPLICIT_LOCATION: |
| 390 | xfree (EL_EXPLICIT (location)->source_filename); |
| 391 | xfree (EL_EXPLICIT (location)->function_name); |
| 392 | xfree (EL_EXPLICIT (location)->label_name); |
| 393 | break; |
| 394 | |
| 395 | case PROBE_LOCATION: |
| 396 | xfree (EL_PROBE (location)); |
| 397 | break; |
| 398 | |
| 399 | default: |
| 400 | gdb_assert_not_reached ("unknown event location type"); |
| 401 | } |
| 402 | |
| 403 | xfree (location); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | /* See description in location.h. */ |
| 408 | |
| 409 | const char * |
| 410 | event_location_to_string (struct event_location *location) |
| 411 | { |
| 412 | if (EL_STRING (location) == NULL) |
| 413 | { |
| 414 | switch (EL_TYPE (location)) |
| 415 | { |
| 416 | case LINESPEC_LOCATION: |
| 417 | if (EL_LINESPEC (location) != NULL) |
| 418 | EL_STRING (location) = xstrdup (EL_LINESPEC (location)); |
| 419 | break; |
| 420 | |
| 421 | case ADDRESS_LOCATION: |
| 422 | EL_STRING (location) |
| 423 | = xstrprintf ("*%s", |
| 424 | core_addr_to_string (EL_ADDRESS (location))); |
| 425 | break; |
| 426 | |
| 427 | case EXPLICIT_LOCATION: |
| 428 | EL_STRING (location) |
| 429 | = explicit_location_to_string (EL_EXPLICIT (location)); |
| 430 | break; |
| 431 | |
| 432 | case PROBE_LOCATION: |
| 433 | EL_STRING (location) = xstrdup (EL_PROBE (location)); |
| 434 | break; |
| 435 | |
| 436 | default: |
| 437 | gdb_assert_not_reached ("unknown event location type"); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | return EL_STRING (location); |
| 442 | } |
| 443 | |
| 444 | /* A lexer for explicit locations. This function will advance INP |
| 445 | past any strings that it lexes. Returns a malloc'd copy of the |
| 446 | lexed string or NULL if no lexing was done. */ |
| 447 | |
| 448 | static char * |
| 449 | explicit_location_lex_one (const char **inp, |
| 450 | const struct language_defn *language) |
| 451 | { |
| 452 | const char *start = *inp; |
| 453 | |
| 454 | if (*start == '\0') |
| 455 | return NULL; |
| 456 | |
| 457 | /* If quoted, skip to the ending quote. */ |
| 458 | if (strchr (get_gdb_linespec_parser_quote_characters (), *start)) |
| 459 | { |
| 460 | char quote_char = *start; |
| 461 | |
| 462 | /* If the input is not an Ada operator, skip to the matching |
| 463 | closing quote and return the string. */ |
| 464 | if (!(language->la_language == language_ada |
| 465 | && quote_char == '\"' && is_ada_operator (start))) |
| 466 | { |
| 467 | const char *end = find_toplevel_char (start + 1, quote_char); |
| 468 | |
| 469 | if (end == NULL) |
| 470 | error (_("Unmatched quote, %s."), start); |
| 471 | *inp = end + 1; |
| 472 | return savestring (start + 1, *inp - start - 2); |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | /* If the input starts with '-' or '+', the string ends with the next |
| 477 | whitespace or comma. */ |
| 478 | if (*start == '-' || *start == '+') |
| 479 | { |
| 480 | while (*inp[0] != '\0' && *inp[0] != ',' && !isspace (*inp[0])) |
| 481 | ++(*inp); |
| 482 | } |
| 483 | else |
| 484 | { |
| 485 | /* Handle numbers first, stopping at the next whitespace or ','. */ |
| 486 | while (isdigit (*inp[0])) |
| 487 | ++(*inp); |
| 488 | if (*inp[0] == '\0' || isspace (*inp[0]) || *inp[0] == ',') |
| 489 | return savestring (start, *inp - start); |
| 490 | |
| 491 | /* Otherwise stop at the next occurrence of whitespace, '\0', |
| 492 | keyword, or ','. */ |
| 493 | *inp = start; |
| 494 | while ((*inp)[0] |
| 495 | && (*inp)[0] != ',' |
| 496 | && !(isspace ((*inp)[0]) |
| 497 | || linespec_lexer_lex_keyword (&(*inp)[1]))) |
| 498 | { |
| 499 | /* Special case: C++ operator,. */ |
| 500 | if (language->la_language == language_cplus |
| 501 | && strncmp (*inp, "operator", 8) == 0) |
| 502 | (*inp) += 8; |
| 503 | ++(*inp); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | if (*inp - start > 0) |
| 508 | return savestring (start, *inp - start); |
| 509 | |
| 510 | return NULL; |
| 511 | } |
| 512 | |
| 513 | /* See description in location.h. */ |
| 514 | |
| 515 | struct event_location * |
| 516 | string_to_explicit_location (const char **argp, |
| 517 | const struct language_defn *language, |
| 518 | int dont_throw) |
| 519 | { |
| 520 | struct cleanup *cleanup; |
| 521 | struct event_location *location; |
| 522 | |
| 523 | /* It is assumed that input beginning with '-' and a non-digit |
| 524 | character is an explicit location. "-p" is reserved, though, |
| 525 | for probe locations. */ |
| 526 | if (argp == NULL |
| 527 | || *argp == NULL |
| 528 | || *argp[0] != '-' |
| 529 | || !isalpha ((*argp)[1]) |
| 530 | || ((*argp)[0] == '-' && (*argp)[1] == 'p')) |
| 531 | return NULL; |
| 532 | |
| 533 | location = new_explicit_location (NULL); |
| 534 | cleanup = make_cleanup_delete_event_location (location); |
| 535 | |
| 536 | /* Process option/argument pairs. dprintf_command |
| 537 | requires that processing stop on ','. */ |
| 538 | while ((*argp)[0] != '\0' && (*argp)[0] != ',') |
| 539 | { |
| 540 | int len; |
| 541 | char *opt, *oarg; |
| 542 | const char *start; |
| 543 | struct cleanup *opt_cleanup, *oarg_cleanup; |
| 544 | |
| 545 | /* If *ARGP starts with a keyword, stop processing |
| 546 | options. */ |
| 547 | if (linespec_lexer_lex_keyword (*argp) != NULL) |
| 548 | break; |
| 549 | |
| 550 | /* Mark the start of the string in case we need to rewind. */ |
| 551 | start = *argp; |
| 552 | |
| 553 | /* Get the option string. */ |
| 554 | opt = explicit_location_lex_one (argp, language); |
| 555 | opt_cleanup = make_cleanup (xfree, opt); |
| 556 | |
| 557 | *argp = skip_spaces_const (*argp); |
| 558 | |
| 559 | /* Get the argument string. */ |
| 560 | oarg = explicit_location_lex_one (argp, language); |
| 561 | oarg_cleanup = make_cleanup (xfree, oarg); |
| 562 | *argp = skip_spaces_const (*argp); |
| 563 | |
| 564 | /* Use the length of the option to allow abbreviations. */ |
| 565 | len = strlen (opt); |
| 566 | |
| 567 | /* All options have a required argument. Checking for this required |
| 568 | argument is deferred until later. */ |
| 569 | if (strncmp (opt, "-source", len) == 0) |
| 570 | EL_EXPLICIT (location)->source_filename = oarg; |
| 571 | else if (strncmp (opt, "-function", len) == 0) |
| 572 | EL_EXPLICIT (location)->function_name = oarg; |
| 573 | else if (strncmp (opt, "-line", len) == 0) |
| 574 | { |
| 575 | if (oarg != NULL) |
| 576 | { |
| 577 | EL_EXPLICIT (location)->line_offset |
| 578 | = linespec_parse_line_offset (oarg); |
| 579 | do_cleanups (oarg_cleanup); |
| 580 | do_cleanups (opt_cleanup); |
| 581 | continue; |
| 582 | } |
| 583 | } |
| 584 | else if (strncmp (opt, "-label", len) == 0) |
| 585 | EL_EXPLICIT (location)->label_name = oarg; |
| 586 | /* Only emit an "invalid argument" error for options |
| 587 | that look like option strings. */ |
| 588 | else if (opt[0] == '-' && !isdigit (opt[1])) |
| 589 | { |
| 590 | if (!dont_throw) |
| 591 | error (_("invalid explicit location argument, \"%s\""), opt); |
| 592 | } |
| 593 | else |
| 594 | { |
| 595 | /* End of the explicit location specification. |
| 596 | Stop parsing and return whatever explicit location was |
| 597 | parsed. */ |
| 598 | *argp = start; |
| 599 | discard_cleanups (oarg_cleanup); |
| 600 | do_cleanups (opt_cleanup); |
| 601 | discard_cleanups (cleanup); |
| 602 | return location; |
| 603 | } |
| 604 | |
| 605 | /* It's a little lame to error after the fact, but in this |
| 606 | case, it provides a much better user experience to issue |
| 607 | the "invalid argument" error before any missing |
| 608 | argument error. */ |
| 609 | if (oarg == NULL && !dont_throw) |
| 610 | error (_("missing argument for \"%s\""), opt); |
| 611 | |
| 612 | /* The option/argument pair was successfully processed; |
| 613 | oarg belongs to the explicit location, and opt should |
| 614 | be freed. */ |
| 615 | discard_cleanups (oarg_cleanup); |
| 616 | do_cleanups (opt_cleanup); |
| 617 | } |
| 618 | |
| 619 | /* One special error check: If a source filename was given |
| 620 | without offset, function, or label, issue an error. */ |
| 621 | if (EL_EXPLICIT (location)->source_filename != NULL |
| 622 | && EL_EXPLICIT (location)->function_name == NULL |
| 623 | && EL_EXPLICIT (location)->label_name == NULL |
| 624 | && (EL_EXPLICIT (location)->line_offset.sign == LINE_OFFSET_UNKNOWN) |
| 625 | && !dont_throw) |
| 626 | { |
| 627 | error (_("Source filename requires function, label, or " |
| 628 | "line offset.")); |
| 629 | } |
| 630 | |
| 631 | discard_cleanups (cleanup); |
| 632 | return location; |
| 633 | } |
| 634 | |
| 635 | /* See description in location.h. */ |
| 636 | |
| 637 | struct event_location * |
| 638 | string_to_event_location_basic (char **stringp, |
| 639 | const struct language_defn *language) |
| 640 | { |
| 641 | struct event_location *location; |
| 642 | const char *cs; |
| 643 | |
| 644 | /* Try the input as a probe spec. */ |
| 645 | cs = *stringp; |
| 646 | if (cs != NULL && probe_linespec_to_ops (&cs) != NULL) |
| 647 | { |
| 648 | location = new_probe_location (*stringp); |
| 649 | *stringp += strlen (*stringp); |
| 650 | } |
| 651 | else |
| 652 | { |
| 653 | /* Try an address location. */ |
| 654 | if (*stringp != NULL && **stringp == '*') |
| 655 | { |
| 656 | const char *arg, *orig; |
| 657 | CORE_ADDR addr; |
| 658 | |
| 659 | orig = arg = *stringp; |
| 660 | addr = linespec_expression_to_pc (&arg); |
| 661 | location = new_address_location (addr, orig, arg - orig); |
| 662 | *stringp += arg - orig; |
| 663 | } |
| 664 | else |
| 665 | { |
| 666 | /* Everything else is a linespec. */ |
| 667 | location = new_linespec_location (stringp); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | return location; |
| 672 | } |
| 673 | |
| 674 | /* See description in location.h. */ |
| 675 | |
| 676 | struct event_location * |
| 677 | string_to_event_location (char **stringp, |
| 678 | const struct language_defn *language) |
| 679 | { |
| 680 | struct event_location *location; |
| 681 | const char *arg, *orig; |
| 682 | |
| 683 | /* Try an explicit location. */ |
| 684 | orig = arg = *stringp; |
| 685 | location = string_to_explicit_location (&arg, language, 0); |
| 686 | if (location != NULL) |
| 687 | { |
| 688 | /* It was a valid explicit location. Advance STRINGP to |
| 689 | the end of input. */ |
| 690 | *stringp += arg - orig; |
| 691 | } |
| 692 | else |
| 693 | { |
| 694 | /* Everything else is a "basic" linespec, address, or probe |
| 695 | location. */ |
| 696 | location = string_to_event_location_basic (stringp, language); |
| 697 | } |
| 698 | |
| 699 | return location; |
| 700 | } |
| 701 | |
| 702 | /* See description in location.h. */ |
| 703 | |
| 704 | int |
| 705 | event_location_empty_p (const struct event_location *location) |
| 706 | { |
| 707 | switch (EL_TYPE (location)) |
| 708 | { |
| 709 | case LINESPEC_LOCATION: |
| 710 | /* Linespecs are never "empty." (NULL is a valid linespec) */ |
| 711 | return 0; |
| 712 | |
| 713 | case ADDRESS_LOCATION: |
| 714 | return 0; |
| 715 | |
| 716 | case EXPLICIT_LOCATION: |
| 717 | return (EL_EXPLICIT (location) == NULL |
| 718 | || (EL_EXPLICIT (location)->source_filename == NULL |
| 719 | && EL_EXPLICIT (location)->function_name == NULL |
| 720 | && EL_EXPLICIT (location)->label_name == NULL |
| 721 | && (EL_EXPLICIT (location)->line_offset.sign |
| 722 | == LINE_OFFSET_UNKNOWN))); |
| 723 | |
| 724 | case PROBE_LOCATION: |
| 725 | return EL_PROBE (location) == NULL; |
| 726 | |
| 727 | default: |
| 728 | gdb_assert_not_reached ("unknown event location type"); |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | /* See description in location.h. */ |
| 733 | |
| 734 | void |
| 735 | set_event_location_string (struct event_location *location, |
| 736 | const char *string) |
| 737 | { |
| 738 | xfree (EL_STRING (location)); |
| 739 | EL_STRING (location) = string == NULL ? NULL : xstrdup (string); |
| 740 | } |