| 1 | /* List lines of source files for GDB, the GNU debugger. |
| 2 | Copyright (C) 1986-2017 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 "arch-utils.h" |
| 21 | #include "symtab.h" |
| 22 | #include "expression.h" |
| 23 | #include "language.h" |
| 24 | #include "command.h" |
| 25 | #include "source.h" |
| 26 | #include "gdbcmd.h" |
| 27 | #include "frame.h" |
| 28 | #include "value.h" |
| 29 | #include "filestuff.h" |
| 30 | |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <fcntl.h> |
| 34 | #include "gdbcore.h" |
| 35 | #include "gdb_regex.h" |
| 36 | #include "symfile.h" |
| 37 | #include "objfiles.h" |
| 38 | #include "annotate.h" |
| 39 | #include "gdbtypes.h" |
| 40 | #include "linespec.h" |
| 41 | #include "filenames.h" /* for DOSish file names */ |
| 42 | #include "completer.h" |
| 43 | #include "ui-out.h" |
| 44 | #include "readline/readline.h" |
| 45 | #include "common/enum-flags.h" |
| 46 | #include <algorithm> |
| 47 | |
| 48 | #define OPEN_MODE (O_RDONLY | O_BINARY) |
| 49 | #define FDOPEN_MODE FOPEN_RB |
| 50 | |
| 51 | /* Prototypes for exported functions. */ |
| 52 | |
| 53 | void _initialize_source (void); |
| 54 | |
| 55 | /* Prototypes for local functions. */ |
| 56 | |
| 57 | static int get_filename_and_charpos (struct symtab *, char **); |
| 58 | |
| 59 | static void reverse_search_command (char *, int); |
| 60 | |
| 61 | static void forward_search_command (char *, int); |
| 62 | |
| 63 | static void line_info (char *, int); |
| 64 | |
| 65 | static void source_info (char *, int); |
| 66 | |
| 67 | /* Path of directories to search for source files. |
| 68 | Same format as the PATH environment variable's value. */ |
| 69 | |
| 70 | char *source_path; |
| 71 | |
| 72 | /* Support for source path substitution commands. */ |
| 73 | |
| 74 | struct substitute_path_rule |
| 75 | { |
| 76 | char *from; |
| 77 | char *to; |
| 78 | struct substitute_path_rule *next; |
| 79 | }; |
| 80 | |
| 81 | static struct substitute_path_rule *substitute_path_rules = NULL; |
| 82 | |
| 83 | /* Symtab of default file for listing lines of. */ |
| 84 | |
| 85 | static struct symtab *current_source_symtab; |
| 86 | |
| 87 | /* Default next line to list. */ |
| 88 | |
| 89 | static int current_source_line; |
| 90 | |
| 91 | static struct program_space *current_source_pspace; |
| 92 | |
| 93 | /* Default number of lines to print with commands like "list". |
| 94 | This is based on guessing how many long (i.e. more than chars_per_line |
| 95 | characters) lines there will be. To be completely correct, "list" |
| 96 | and friends should be rewritten to count characters and see where |
| 97 | things are wrapping, but that would be a fair amount of work. */ |
| 98 | |
| 99 | static int lines_to_list = 10; |
| 100 | static void |
| 101 | show_lines_to_list (struct ui_file *file, int from_tty, |
| 102 | struct cmd_list_element *c, const char *value) |
| 103 | { |
| 104 | fprintf_filtered (file, |
| 105 | _("Number of source lines gdb " |
| 106 | "will list by default is %s.\n"), |
| 107 | value); |
| 108 | } |
| 109 | |
| 110 | /* Possible values of 'set filename-display'. */ |
| 111 | static const char filename_display_basename[] = "basename"; |
| 112 | static const char filename_display_relative[] = "relative"; |
| 113 | static const char filename_display_absolute[] = "absolute"; |
| 114 | |
| 115 | static const char *const filename_display_kind_names[] = { |
| 116 | filename_display_basename, |
| 117 | filename_display_relative, |
| 118 | filename_display_absolute, |
| 119 | NULL |
| 120 | }; |
| 121 | |
| 122 | static const char *filename_display_string = filename_display_relative; |
| 123 | |
| 124 | static void |
| 125 | show_filename_display_string (struct ui_file *file, int from_tty, |
| 126 | struct cmd_list_element *c, const char *value) |
| 127 | { |
| 128 | fprintf_filtered (file, _("Filenames are displayed as \"%s\".\n"), value); |
| 129 | } |
| 130 | |
| 131 | /* Line number of last line printed. Default for various commands. |
| 132 | current_source_line is usually, but not always, the same as this. */ |
| 133 | |
| 134 | static int last_line_listed; |
| 135 | |
| 136 | /* First line number listed by last listing command. If 0, then no |
| 137 | source lines have yet been listed since the last time the current |
| 138 | source line was changed. */ |
| 139 | |
| 140 | static int first_line_listed; |
| 141 | |
| 142 | /* Saves the name of the last source file visited and a possible error code. |
| 143 | Used to prevent repeating annoying "No such file or directories" msgs. */ |
| 144 | |
| 145 | static struct symtab *last_source_visited = NULL; |
| 146 | static int last_source_error = 0; |
| 147 | \f |
| 148 | /* Return the first line listed by print_source_lines. |
| 149 | Used by command interpreters to request listing from |
| 150 | a previous point. */ |
| 151 | |
| 152 | int |
| 153 | get_first_line_listed (void) |
| 154 | { |
| 155 | return first_line_listed; |
| 156 | } |
| 157 | |
| 158 | /* Clear line listed range. This makes the next "list" center the |
| 159 | printed source lines around the current source line. */ |
| 160 | |
| 161 | static void |
| 162 | clear_lines_listed_range (void) |
| 163 | { |
| 164 | first_line_listed = 0; |
| 165 | last_line_listed = 0; |
| 166 | } |
| 167 | |
| 168 | /* Return the default number of lines to print with commands like the |
| 169 | cli "list". The caller of print_source_lines must use this to |
| 170 | calculate the end line and use it in the call to print_source_lines |
| 171 | as it does not automatically use this value. */ |
| 172 | |
| 173 | int |
| 174 | get_lines_to_list (void) |
| 175 | { |
| 176 | return lines_to_list; |
| 177 | } |
| 178 | |
| 179 | /* Return the current source file for listing and next line to list. |
| 180 | NOTE: The returned sal pc and end fields are not valid. */ |
| 181 | |
| 182 | struct symtab_and_line |
| 183 | get_current_source_symtab_and_line (void) |
| 184 | { |
| 185 | struct symtab_and_line cursal = { 0 }; |
| 186 | |
| 187 | cursal.pspace = current_source_pspace; |
| 188 | cursal.symtab = current_source_symtab; |
| 189 | cursal.line = current_source_line; |
| 190 | cursal.pc = 0; |
| 191 | cursal.end = 0; |
| 192 | |
| 193 | return cursal; |
| 194 | } |
| 195 | |
| 196 | /* If the current source file for listing is not set, try and get a default. |
| 197 | Usually called before get_current_source_symtab_and_line() is called. |
| 198 | It may err out if a default cannot be determined. |
| 199 | We must be cautious about where it is called, as it can recurse as the |
| 200 | process of determining a new default may call the caller! |
| 201 | Use get_current_source_symtab_and_line only to get whatever |
| 202 | we have without erroring out or trying to get a default. */ |
| 203 | |
| 204 | void |
| 205 | set_default_source_symtab_and_line (void) |
| 206 | { |
| 207 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 208 | error (_("No symbol table is loaded. Use the \"file\" command.")); |
| 209 | |
| 210 | /* Pull in a current source symtab if necessary. */ |
| 211 | if (current_source_symtab == 0) |
| 212 | select_source_symtab (0); |
| 213 | } |
| 214 | |
| 215 | /* Return the current default file for listing and next line to list |
| 216 | (the returned sal pc and end fields are not valid.) |
| 217 | and set the current default to whatever is in SAL. |
| 218 | NOTE: The returned sal pc and end fields are not valid. */ |
| 219 | |
| 220 | struct symtab_and_line |
| 221 | set_current_source_symtab_and_line (const struct symtab_and_line *sal) |
| 222 | { |
| 223 | struct symtab_and_line cursal = { 0 }; |
| 224 | |
| 225 | cursal.pspace = current_source_pspace; |
| 226 | cursal.symtab = current_source_symtab; |
| 227 | cursal.line = current_source_line; |
| 228 | cursal.pc = 0; |
| 229 | cursal.end = 0; |
| 230 | |
| 231 | current_source_pspace = sal->pspace; |
| 232 | current_source_symtab = sal->symtab; |
| 233 | current_source_line = sal->line; |
| 234 | |
| 235 | /* Force the next "list" to center around the current line. */ |
| 236 | clear_lines_listed_range (); |
| 237 | |
| 238 | return cursal; |
| 239 | } |
| 240 | |
| 241 | /* Reset any information stored about a default file and line to print. */ |
| 242 | |
| 243 | void |
| 244 | clear_current_source_symtab_and_line (void) |
| 245 | { |
| 246 | current_source_symtab = 0; |
| 247 | current_source_line = 0; |
| 248 | } |
| 249 | |
| 250 | /* Set the source file default for the "list" command to be S. |
| 251 | |
| 252 | If S is NULL, and we don't have a default, find one. This |
| 253 | should only be called when the user actually tries to use the |
| 254 | default, since we produce an error if we can't find a reasonable |
| 255 | default. Also, since this can cause symbols to be read, doing it |
| 256 | before we need to would make things slower than necessary. */ |
| 257 | |
| 258 | void |
| 259 | select_source_symtab (struct symtab *s) |
| 260 | { |
| 261 | struct symtabs_and_lines sals; |
| 262 | struct symtab_and_line sal; |
| 263 | struct objfile *ofp; |
| 264 | struct compunit_symtab *cu; |
| 265 | |
| 266 | if (s) |
| 267 | { |
| 268 | current_source_symtab = s; |
| 269 | current_source_line = 1; |
| 270 | current_source_pspace = SYMTAB_PSPACE (s); |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | if (current_source_symtab) |
| 275 | return; |
| 276 | |
| 277 | /* Make the default place to list be the function `main' |
| 278 | if one exists. */ |
| 279 | if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0).symbol) |
| 280 | { |
| 281 | sals = decode_line_with_current_source (main_name (), |
| 282 | DECODE_LINE_FUNFIRSTLINE); |
| 283 | sal = sals.sals[0]; |
| 284 | xfree (sals.sals); |
| 285 | current_source_pspace = sal.pspace; |
| 286 | current_source_symtab = sal.symtab; |
| 287 | current_source_line = std::max (sal.line - (lines_to_list - 1), 1); |
| 288 | if (current_source_symtab) |
| 289 | return; |
| 290 | } |
| 291 | |
| 292 | /* Alright; find the last file in the symtab list (ignoring .h's |
| 293 | and namespace symtabs). */ |
| 294 | |
| 295 | current_source_line = 1; |
| 296 | |
| 297 | ALL_FILETABS (ofp, cu, s) |
| 298 | { |
| 299 | const char *name = s->filename; |
| 300 | int len = strlen (name); |
| 301 | |
| 302 | if (!(len > 2 && (strcmp (&name[len - 2], ".h") == 0 |
| 303 | || strcmp (name, "<<C++-namespaces>>") == 0))) |
| 304 | { |
| 305 | current_source_pspace = current_program_space; |
| 306 | current_source_symtab = s; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | if (current_source_symtab) |
| 311 | return; |
| 312 | |
| 313 | ALL_OBJFILES (ofp) |
| 314 | { |
| 315 | if (ofp->sf) |
| 316 | s = ofp->sf->qf->find_last_source_symtab (ofp); |
| 317 | if (s) |
| 318 | current_source_symtab = s; |
| 319 | } |
| 320 | if (current_source_symtab) |
| 321 | return; |
| 322 | |
| 323 | error (_("Can't find a default source file")); |
| 324 | } |
| 325 | \f |
| 326 | /* Handler for "set directories path-list" command. |
| 327 | "set dir mumble" doesn't prepend paths, it resets the entire |
| 328 | path list. The theory is that set(show(dir)) should be a no-op. */ |
| 329 | |
| 330 | static void |
| 331 | set_directories_command (char *args, int from_tty, struct cmd_list_element *c) |
| 332 | { |
| 333 | /* This is the value that was set. |
| 334 | It needs to be processed to maintain $cdir:$cwd and remove dups. */ |
| 335 | char *set_path = source_path; |
| 336 | |
| 337 | /* We preserve the invariant that $cdir:$cwd begins life at the end of |
| 338 | the list by calling init_source_path. If they appear earlier in |
| 339 | SET_PATH then mod_path will move them appropriately. |
| 340 | mod_path will also remove duplicates. */ |
| 341 | init_source_path (); |
| 342 | if (*set_path != '\0') |
| 343 | mod_path (set_path, &source_path); |
| 344 | |
| 345 | xfree (set_path); |
| 346 | } |
| 347 | |
| 348 | /* Print the list of source directories. |
| 349 | This is used by the "ld" command, so it has the signature of a command |
| 350 | function. */ |
| 351 | |
| 352 | static void |
| 353 | show_directories_1 (char *ignore, int from_tty) |
| 354 | { |
| 355 | puts_filtered ("Source directories searched: "); |
| 356 | puts_filtered (source_path); |
| 357 | puts_filtered ("\n"); |
| 358 | } |
| 359 | |
| 360 | /* Handler for "show directories" command. */ |
| 361 | |
| 362 | static void |
| 363 | show_directories_command (struct ui_file *file, int from_tty, |
| 364 | struct cmd_list_element *c, const char *value) |
| 365 | { |
| 366 | show_directories_1 (NULL, from_tty); |
| 367 | } |
| 368 | |
| 369 | /* Forget line positions and file names for the symtabs in a |
| 370 | particular objfile. */ |
| 371 | |
| 372 | void |
| 373 | forget_cached_source_info_for_objfile (struct objfile *objfile) |
| 374 | { |
| 375 | struct compunit_symtab *cu; |
| 376 | struct symtab *s; |
| 377 | |
| 378 | ALL_OBJFILE_FILETABS (objfile, cu, s) |
| 379 | { |
| 380 | if (s->line_charpos != NULL) |
| 381 | { |
| 382 | xfree (s->line_charpos); |
| 383 | s->line_charpos = NULL; |
| 384 | } |
| 385 | if (s->fullname != NULL) |
| 386 | { |
| 387 | xfree (s->fullname); |
| 388 | s->fullname = NULL; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | if (objfile->sf) |
| 393 | objfile->sf->qf->forget_cached_source_info (objfile); |
| 394 | } |
| 395 | |
| 396 | /* Forget what we learned about line positions in source files, and |
| 397 | which directories contain them; must check again now since files |
| 398 | may be found in a different directory now. */ |
| 399 | |
| 400 | void |
| 401 | forget_cached_source_info (void) |
| 402 | { |
| 403 | struct program_space *pspace; |
| 404 | struct objfile *objfile; |
| 405 | |
| 406 | ALL_PSPACES (pspace) |
| 407 | ALL_PSPACE_OBJFILES (pspace, objfile) |
| 408 | { |
| 409 | forget_cached_source_info_for_objfile (objfile); |
| 410 | } |
| 411 | |
| 412 | last_source_visited = NULL; |
| 413 | } |
| 414 | |
| 415 | void |
| 416 | init_source_path (void) |
| 417 | { |
| 418 | char buf[20]; |
| 419 | |
| 420 | xsnprintf (buf, sizeof (buf), "$cdir%c$cwd", DIRNAME_SEPARATOR); |
| 421 | source_path = xstrdup (buf); |
| 422 | forget_cached_source_info (); |
| 423 | } |
| 424 | |
| 425 | /* Add zero or more directories to the front of the source path. */ |
| 426 | |
| 427 | static void |
| 428 | directory_command (char *dirname, int from_tty) |
| 429 | { |
| 430 | dont_repeat (); |
| 431 | /* FIXME, this goes to "delete dir"... */ |
| 432 | if (dirname == 0) |
| 433 | { |
| 434 | if (!from_tty || query (_("Reinitialize source path to empty? "))) |
| 435 | { |
| 436 | xfree (source_path); |
| 437 | init_source_path (); |
| 438 | } |
| 439 | } |
| 440 | else |
| 441 | { |
| 442 | mod_path (dirname, &source_path); |
| 443 | forget_cached_source_info (); |
| 444 | } |
| 445 | if (from_tty) |
| 446 | show_directories_1 ((char *) 0, from_tty); |
| 447 | } |
| 448 | |
| 449 | /* Add a path given with the -d command line switch. |
| 450 | This will not be quoted so we must not treat spaces as separators. */ |
| 451 | |
| 452 | void |
| 453 | directory_switch (char *dirname, int from_tty) |
| 454 | { |
| 455 | add_path (dirname, &source_path, 0); |
| 456 | } |
| 457 | |
| 458 | /* Add zero or more directories to the front of an arbitrary path. */ |
| 459 | |
| 460 | void |
| 461 | mod_path (char *dirname, char **which_path) |
| 462 | { |
| 463 | add_path (dirname, which_path, 1); |
| 464 | } |
| 465 | |
| 466 | /* Workhorse of mod_path. Takes an extra argument to determine |
| 467 | if dirname should be parsed for separators that indicate multiple |
| 468 | directories. This allows for interfaces that pre-parse the dirname |
| 469 | and allow specification of traditional separator characters such |
| 470 | as space or tab. */ |
| 471 | |
| 472 | void |
| 473 | add_path (char *dirname, char **which_path, int parse_separators) |
| 474 | { |
| 475 | char *old = *which_path; |
| 476 | int prefix = 0; |
| 477 | VEC (char_ptr) *dir_vec = NULL; |
| 478 | struct cleanup *back_to; |
| 479 | int ix; |
| 480 | char *name; |
| 481 | |
| 482 | if (dirname == 0) |
| 483 | return; |
| 484 | |
| 485 | if (parse_separators) |
| 486 | { |
| 487 | char **argv, **argvp; |
| 488 | |
| 489 | /* This will properly parse the space and tab separators |
| 490 | and any quotes that may exist. */ |
| 491 | argv = gdb_buildargv (dirname); |
| 492 | |
| 493 | for (argvp = argv; *argvp; argvp++) |
| 494 | dirnames_to_char_ptr_vec_append (&dir_vec, *argvp); |
| 495 | |
| 496 | freeargv (argv); |
| 497 | } |
| 498 | else |
| 499 | VEC_safe_push (char_ptr, dir_vec, xstrdup (dirname)); |
| 500 | back_to = make_cleanup_free_char_ptr_vec (dir_vec); |
| 501 | |
| 502 | for (ix = 0; VEC_iterate (char_ptr, dir_vec, ix, name); ++ix) |
| 503 | { |
| 504 | char *p; |
| 505 | struct stat st; |
| 506 | |
| 507 | /* Spaces and tabs will have been removed by buildargv(). |
| 508 | NAME is the start of the directory. |
| 509 | P is the '\0' following the end. */ |
| 510 | p = name + strlen (name); |
| 511 | |
| 512 | while (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */ |
| 513 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 514 | /* On MS-DOS and MS-Windows, h:\ is different from h: */ |
| 515 | && !(p == name + 3 && name[1] == ':') /* "d:/" */ |
| 516 | #endif |
| 517 | && IS_DIR_SEPARATOR (p[-1])) |
| 518 | /* Sigh. "foo/" => "foo" */ |
| 519 | --p; |
| 520 | *p = '\0'; |
| 521 | |
| 522 | while (p > name && p[-1] == '.') |
| 523 | { |
| 524 | if (p - name == 1) |
| 525 | { |
| 526 | /* "." => getwd (). */ |
| 527 | name = current_directory; |
| 528 | goto append; |
| 529 | } |
| 530 | else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2])) |
| 531 | { |
| 532 | if (p - name == 2) |
| 533 | { |
| 534 | /* "/." => "/". */ |
| 535 | *--p = '\0'; |
| 536 | goto append; |
| 537 | } |
| 538 | else |
| 539 | { |
| 540 | /* "...foo/." => "...foo". */ |
| 541 | p -= 2; |
| 542 | *p = '\0'; |
| 543 | continue; |
| 544 | } |
| 545 | } |
| 546 | else |
| 547 | break; |
| 548 | } |
| 549 | |
| 550 | if (name[0] == '~') |
| 551 | name = tilde_expand (name); |
| 552 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 553 | else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */ |
| 554 | name = concat (name, ".", (char *)NULL); |
| 555 | #endif |
| 556 | else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$') |
| 557 | name = concat (current_directory, SLASH_STRING, name, (char *)NULL); |
| 558 | else |
| 559 | name = savestring (name, p - name); |
| 560 | make_cleanup (xfree, name); |
| 561 | |
| 562 | /* Unless it's a variable, check existence. */ |
| 563 | if (name[0] != '$') |
| 564 | { |
| 565 | /* These are warnings, not errors, since we don't want a |
| 566 | non-existent directory in a .gdbinit file to stop processing |
| 567 | of the .gdbinit file. |
| 568 | |
| 569 | Whether they get added to the path is more debatable. Current |
| 570 | answer is yes, in case the user wants to go make the directory |
| 571 | or whatever. If the directory continues to not exist/not be |
| 572 | a directory/etc, then having them in the path should be |
| 573 | harmless. */ |
| 574 | if (stat (name, &st) < 0) |
| 575 | { |
| 576 | int save_errno = errno; |
| 577 | |
| 578 | fprintf_unfiltered (gdb_stderr, "Warning: "); |
| 579 | print_sys_errmsg (name, save_errno); |
| 580 | } |
| 581 | else if ((st.st_mode & S_IFMT) != S_IFDIR) |
| 582 | warning (_("%s is not a directory."), name); |
| 583 | } |
| 584 | |
| 585 | append: |
| 586 | { |
| 587 | unsigned int len = strlen (name); |
| 588 | char tinybuf[2]; |
| 589 | |
| 590 | p = *which_path; |
| 591 | while (1) |
| 592 | { |
| 593 | /* FIXME: we should use realpath() or its work-alike |
| 594 | before comparing. Then all the code above which |
| 595 | removes excess slashes and dots could simply go away. */ |
| 596 | if (!filename_ncmp (p, name, len) |
| 597 | && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR)) |
| 598 | { |
| 599 | /* Found it in the search path, remove old copy. */ |
| 600 | if (p > *which_path) |
| 601 | { |
| 602 | /* Back over leading separator. */ |
| 603 | p--; |
| 604 | } |
| 605 | if (prefix > p - *which_path) |
| 606 | { |
| 607 | /* Same dir twice in one cmd. */ |
| 608 | goto skip_dup; |
| 609 | } |
| 610 | /* Copy from next '\0' or ':'. */ |
| 611 | memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1); |
| 612 | } |
| 613 | p = strchr (p, DIRNAME_SEPARATOR); |
| 614 | if (p != 0) |
| 615 | ++p; |
| 616 | else |
| 617 | break; |
| 618 | } |
| 619 | |
| 620 | tinybuf[0] = DIRNAME_SEPARATOR; |
| 621 | tinybuf[1] = '\0'; |
| 622 | |
| 623 | /* If we have already tacked on a name(s) in this command, |
| 624 | be sure they stay on the front as we tack on some |
| 625 | more. */ |
| 626 | if (prefix) |
| 627 | { |
| 628 | char *temp, c; |
| 629 | |
| 630 | c = old[prefix]; |
| 631 | old[prefix] = '\0'; |
| 632 | temp = concat (old, tinybuf, name, (char *)NULL); |
| 633 | old[prefix] = c; |
| 634 | *which_path = concat (temp, "", &old[prefix], (char *) NULL); |
| 635 | prefix = strlen (temp); |
| 636 | xfree (temp); |
| 637 | } |
| 638 | else |
| 639 | { |
| 640 | *which_path = concat (name, (old[0] ? tinybuf : old), |
| 641 | old, (char *)NULL); |
| 642 | prefix = strlen (name); |
| 643 | } |
| 644 | xfree (old); |
| 645 | old = *which_path; |
| 646 | } |
| 647 | skip_dup: |
| 648 | ; |
| 649 | } |
| 650 | |
| 651 | do_cleanups (back_to); |
| 652 | } |
| 653 | |
| 654 | |
| 655 | static void |
| 656 | source_info (char *ignore, int from_tty) |
| 657 | { |
| 658 | struct symtab *s = current_source_symtab; |
| 659 | struct compunit_symtab *cust; |
| 660 | |
| 661 | if (!s) |
| 662 | { |
| 663 | printf_filtered (_("No current source file.\n")); |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | cust = SYMTAB_COMPUNIT (s); |
| 668 | printf_filtered (_("Current source file is %s\n"), s->filename); |
| 669 | if (SYMTAB_DIRNAME (s) != NULL) |
| 670 | printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s)); |
| 671 | if (s->fullname) |
| 672 | printf_filtered (_("Located in %s\n"), s->fullname); |
| 673 | if (s->nlines) |
| 674 | printf_filtered (_("Contains %d line%s.\n"), s->nlines, |
| 675 | s->nlines == 1 ? "" : "s"); |
| 676 | |
| 677 | printf_filtered (_("Source language is %s.\n"), language_str (s->language)); |
| 678 | printf_filtered (_("Producer is %s.\n"), |
| 679 | COMPUNIT_PRODUCER (cust) != NULL |
| 680 | ? COMPUNIT_PRODUCER (cust) : _("unknown")); |
| 681 | printf_filtered (_("Compiled with %s debugging format.\n"), |
| 682 | COMPUNIT_DEBUGFORMAT (cust)); |
| 683 | printf_filtered (_("%s preprocessor macro info.\n"), |
| 684 | COMPUNIT_MACRO_TABLE (cust) != NULL |
| 685 | ? "Includes" : "Does not include"); |
| 686 | } |
| 687 | \f |
| 688 | |
| 689 | /* Return True if the file NAME exists and is a regular file. |
| 690 | If the result is false then *ERRNO_PTR is set to a useful value assuming |
| 691 | we're expecting a regular file. */ |
| 692 | |
| 693 | static int |
| 694 | is_regular_file (const char *name, int *errno_ptr) |
| 695 | { |
| 696 | struct stat st; |
| 697 | const int status = stat (name, &st); |
| 698 | |
| 699 | /* Stat should never fail except when the file does not exist. |
| 700 | If stat fails, analyze the source of error and return True |
| 701 | unless the file does not exist, to avoid returning false results |
| 702 | on obscure systems where stat does not work as expected. */ |
| 703 | |
| 704 | if (status != 0) |
| 705 | { |
| 706 | if (errno != ENOENT) |
| 707 | return 1; |
| 708 | *errno_ptr = ENOENT; |
| 709 | return 0; |
| 710 | } |
| 711 | |
| 712 | if (S_ISREG (st.st_mode)) |
| 713 | return 1; |
| 714 | |
| 715 | if (S_ISDIR (st.st_mode)) |
| 716 | *errno_ptr = EISDIR; |
| 717 | else |
| 718 | *errno_ptr = EINVAL; |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | /* Open a file named STRING, searching path PATH (dir names sep by some char) |
| 723 | using mode MODE in the calls to open. You cannot use this function to |
| 724 | create files (O_CREAT). |
| 725 | |
| 726 | OPTS specifies the function behaviour in specific cases. |
| 727 | |
| 728 | If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH. |
| 729 | (ie pretend the first element of PATH is "."). This also indicates |
| 730 | that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING |
| 731 | disables searching of the path (this is so that "exec-file ./foo" or |
| 732 | "symbol-file ./foo" insures that you get that particular version of |
| 733 | foo or an error message). |
| 734 | |
| 735 | If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be |
| 736 | searched in path (we usually want this for source files but not for |
| 737 | executables). |
| 738 | |
| 739 | If FILENAME_OPENED is non-null, set it to a newly allocated string naming |
| 740 | the actual file opened (this string will always start with a "/"). We |
| 741 | have to take special pains to avoid doubling the "/" between the directory |
| 742 | and the file, sigh! Emacs gets confuzzed by this when we print the |
| 743 | source file name!!! |
| 744 | |
| 745 | If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by |
| 746 | gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns |
| 747 | filename starting with "/". If FILENAME_OPENED is NULL this option has no |
| 748 | effect. |
| 749 | |
| 750 | If a file is found, return the descriptor. |
| 751 | Otherwise, return -1, with errno set for the last name we tried to open. */ |
| 752 | |
| 753 | /* >>>> This should only allow files of certain types, |
| 754 | >>>> eg executable, non-directory. */ |
| 755 | int |
| 756 | openp (const char *path, int opts, const char *string, |
| 757 | int mode, char **filename_opened) |
| 758 | { |
| 759 | int fd; |
| 760 | char *filename; |
| 761 | int alloclen; |
| 762 | VEC (char_ptr) *dir_vec; |
| 763 | struct cleanup *back_to; |
| 764 | int ix; |
| 765 | char *dir; |
| 766 | /* The errno set for the last name we tried to open (and |
| 767 | failed). */ |
| 768 | int last_errno = 0; |
| 769 | |
| 770 | /* The open syscall MODE parameter is not specified. */ |
| 771 | gdb_assert ((mode & O_CREAT) == 0); |
| 772 | gdb_assert (string != NULL); |
| 773 | |
| 774 | /* A file with an empty name cannot possibly exist. Report a failure |
| 775 | without further checking. |
| 776 | |
| 777 | This is an optimization which also defends us against buggy |
| 778 | implementations of the "stat" function. For instance, we have |
| 779 | noticed that a MinGW debugger built on Windows XP 32bits crashes |
| 780 | when the debugger is started with an empty argument. */ |
| 781 | if (string[0] == '\0') |
| 782 | { |
| 783 | errno = ENOENT; |
| 784 | return -1; |
| 785 | } |
| 786 | |
| 787 | if (!path) |
| 788 | path = "."; |
| 789 | |
| 790 | mode |= O_BINARY; |
| 791 | |
| 792 | if ((opts & OPF_TRY_CWD_FIRST) || IS_ABSOLUTE_PATH (string)) |
| 793 | { |
| 794 | int i, reg_file_errno; |
| 795 | |
| 796 | if (is_regular_file (string, ®_file_errno)) |
| 797 | { |
| 798 | filename = (char *) alloca (strlen (string) + 1); |
| 799 | strcpy (filename, string); |
| 800 | fd = gdb_open_cloexec (filename, mode, 0); |
| 801 | if (fd >= 0) |
| 802 | goto done; |
| 803 | last_errno = errno; |
| 804 | } |
| 805 | else |
| 806 | { |
| 807 | filename = NULL; |
| 808 | fd = -1; |
| 809 | last_errno = reg_file_errno; |
| 810 | } |
| 811 | |
| 812 | if (!(opts & OPF_SEARCH_IN_PATH)) |
| 813 | for (i = 0; string[i]; i++) |
| 814 | if (IS_DIR_SEPARATOR (string[i])) |
| 815 | goto done; |
| 816 | } |
| 817 | |
| 818 | /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */ |
| 819 | if (HAS_DRIVE_SPEC (string)) |
| 820 | string = STRIP_DRIVE_SPEC (string); |
| 821 | |
| 822 | /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */ |
| 823 | while (IS_DIR_SEPARATOR(string[0])) |
| 824 | string++; |
| 825 | |
| 826 | /* ./foo => foo */ |
| 827 | while (string[0] == '.' && IS_DIR_SEPARATOR (string[1])) |
| 828 | string += 2; |
| 829 | |
| 830 | alloclen = strlen (path) + strlen (string) + 2; |
| 831 | filename = (char *) alloca (alloclen); |
| 832 | fd = -1; |
| 833 | last_errno = ENOENT; |
| 834 | |
| 835 | dir_vec = dirnames_to_char_ptr_vec (path); |
| 836 | back_to = make_cleanup_free_char_ptr_vec (dir_vec); |
| 837 | |
| 838 | for (ix = 0; VEC_iterate (char_ptr, dir_vec, ix, dir); ++ix) |
| 839 | { |
| 840 | size_t len = strlen (dir); |
| 841 | int reg_file_errno; |
| 842 | |
| 843 | if (strcmp (dir, "$cwd") == 0) |
| 844 | { |
| 845 | /* Name is $cwd -- insert current directory name instead. */ |
| 846 | int newlen; |
| 847 | |
| 848 | /* First, realloc the filename buffer if too short. */ |
| 849 | len = strlen (current_directory); |
| 850 | newlen = len + strlen (string) + 2; |
| 851 | if (newlen > alloclen) |
| 852 | { |
| 853 | alloclen = newlen; |
| 854 | filename = (char *) alloca (alloclen); |
| 855 | } |
| 856 | strcpy (filename, current_directory); |
| 857 | } |
| 858 | else if (strchr(dir, '~')) |
| 859 | { |
| 860 | /* See whether we need to expand the tilde. */ |
| 861 | int newlen; |
| 862 | char *tilde_expanded; |
| 863 | |
| 864 | tilde_expanded = tilde_expand (dir); |
| 865 | |
| 866 | /* First, realloc the filename buffer if too short. */ |
| 867 | len = strlen (tilde_expanded); |
| 868 | newlen = len + strlen (string) + 2; |
| 869 | if (newlen > alloclen) |
| 870 | { |
| 871 | alloclen = newlen; |
| 872 | filename = (char *) alloca (alloclen); |
| 873 | } |
| 874 | strcpy (filename, tilde_expanded); |
| 875 | xfree (tilde_expanded); |
| 876 | } |
| 877 | else |
| 878 | { |
| 879 | /* Normal file name in path -- just use it. */ |
| 880 | strcpy (filename, dir); |
| 881 | |
| 882 | /* Don't search $cdir. It's also a magic path like $cwd, but we |
| 883 | don't have enough information to expand it. The user *could* |
| 884 | have an actual directory named '$cdir' but handling that would |
| 885 | be confusing, it would mean different things in different |
| 886 | contexts. If the user really has '$cdir' one can use './$cdir'. |
| 887 | We can get $cdir when loading scripts. When loading source files |
| 888 | $cdir must have already been expanded to the correct value. */ |
| 889 | if (strcmp (dir, "$cdir") == 0) |
| 890 | continue; |
| 891 | } |
| 892 | |
| 893 | /* Remove trailing slashes. */ |
| 894 | while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1])) |
| 895 | filename[--len] = 0; |
| 896 | |
| 897 | strcat (filename + len, SLASH_STRING); |
| 898 | strcat (filename, string); |
| 899 | |
| 900 | if (is_regular_file (filename, ®_file_errno)) |
| 901 | { |
| 902 | fd = gdb_open_cloexec (filename, mode, 0); |
| 903 | if (fd >= 0) |
| 904 | break; |
| 905 | last_errno = errno; |
| 906 | } |
| 907 | else |
| 908 | last_errno = reg_file_errno; |
| 909 | } |
| 910 | |
| 911 | do_cleanups (back_to); |
| 912 | |
| 913 | done: |
| 914 | if (filename_opened) |
| 915 | { |
| 916 | /* If a file was opened, canonicalize its filename. */ |
| 917 | if (fd < 0) |
| 918 | *filename_opened = NULL; |
| 919 | else if ((opts & OPF_RETURN_REALPATH) != 0) |
| 920 | *filename_opened = gdb_realpath (filename); |
| 921 | else |
| 922 | *filename_opened = gdb_abspath (filename); |
| 923 | } |
| 924 | |
| 925 | errno = last_errno; |
| 926 | return fd; |
| 927 | } |
| 928 | |
| 929 | |
| 930 | /* This is essentially a convenience, for clients that want the behaviour |
| 931 | of openp, using source_path, but that really don't want the file to be |
| 932 | opened but want instead just to know what the full pathname is (as |
| 933 | qualified against source_path). |
| 934 | |
| 935 | The current working directory is searched first. |
| 936 | |
| 937 | If the file was found, this function returns 1, and FULL_PATHNAME is |
| 938 | set to the fully-qualified pathname. |
| 939 | |
| 940 | Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */ |
| 941 | int |
| 942 | source_full_path_of (const char *filename, char **full_pathname) |
| 943 | { |
| 944 | int fd; |
| 945 | |
| 946 | fd = openp (source_path, |
| 947 | OPF_TRY_CWD_FIRST | OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, |
| 948 | filename, O_RDONLY, full_pathname); |
| 949 | if (fd < 0) |
| 950 | { |
| 951 | *full_pathname = NULL; |
| 952 | return 0; |
| 953 | } |
| 954 | |
| 955 | close (fd); |
| 956 | return 1; |
| 957 | } |
| 958 | |
| 959 | /* Return non-zero if RULE matches PATH, that is if the rule can be |
| 960 | applied to PATH. */ |
| 961 | |
| 962 | static int |
| 963 | substitute_path_rule_matches (const struct substitute_path_rule *rule, |
| 964 | const char *path) |
| 965 | { |
| 966 | const int from_len = strlen (rule->from); |
| 967 | const int path_len = strlen (path); |
| 968 | |
| 969 | if (path_len < from_len) |
| 970 | return 0; |
| 971 | |
| 972 | /* The substitution rules are anchored at the start of the path, |
| 973 | so the path should start with rule->from. */ |
| 974 | |
| 975 | if (filename_ncmp (path, rule->from, from_len) != 0) |
| 976 | return 0; |
| 977 | |
| 978 | /* Make sure that the region in the path that matches the substitution |
| 979 | rule is immediately followed by a directory separator (or the end of |
| 980 | string character). */ |
| 981 | |
| 982 | if (path[from_len] != '\0' && !IS_DIR_SEPARATOR (path[from_len])) |
| 983 | return 0; |
| 984 | |
| 985 | return 1; |
| 986 | } |
| 987 | |
| 988 | /* Find the substitute-path rule that applies to PATH and return it. |
| 989 | Return NULL if no rule applies. */ |
| 990 | |
| 991 | static struct substitute_path_rule * |
| 992 | get_substitute_path_rule (const char *path) |
| 993 | { |
| 994 | struct substitute_path_rule *rule = substitute_path_rules; |
| 995 | |
| 996 | while (rule != NULL && !substitute_path_rule_matches (rule, path)) |
| 997 | rule = rule->next; |
| 998 | |
| 999 | return rule; |
| 1000 | } |
| 1001 | |
| 1002 | /* If the user specified a source path substitution rule that applies |
| 1003 | to PATH, then apply it and return the new path. This new path must |
| 1004 | be deallocated afterwards. |
| 1005 | |
| 1006 | Return NULL if no substitution rule was specified by the user, |
| 1007 | or if no rule applied to the given PATH. */ |
| 1008 | |
| 1009 | char * |
| 1010 | rewrite_source_path (const char *path) |
| 1011 | { |
| 1012 | const struct substitute_path_rule *rule = get_substitute_path_rule (path); |
| 1013 | char *new_path; |
| 1014 | int from_len; |
| 1015 | |
| 1016 | if (rule == NULL) |
| 1017 | return NULL; |
| 1018 | |
| 1019 | from_len = strlen (rule->from); |
| 1020 | |
| 1021 | /* Compute the rewritten path and return it. */ |
| 1022 | |
| 1023 | new_path = |
| 1024 | (char *) xmalloc (strlen (path) + 1 + strlen (rule->to) - from_len); |
| 1025 | strcpy (new_path, rule->to); |
| 1026 | strcat (new_path, path + from_len); |
| 1027 | |
| 1028 | return new_path; |
| 1029 | } |
| 1030 | |
| 1031 | int |
| 1032 | find_and_open_source (const char *filename, |
| 1033 | const char *dirname, |
| 1034 | char **fullname) |
| 1035 | { |
| 1036 | char *path = source_path; |
| 1037 | const char *p; |
| 1038 | int result; |
| 1039 | struct cleanup *cleanup; |
| 1040 | |
| 1041 | /* Quick way out if we already know its full name. */ |
| 1042 | |
| 1043 | if (*fullname) |
| 1044 | { |
| 1045 | /* The user may have requested that source paths be rewritten |
| 1046 | according to substitution rules he provided. If a substitution |
| 1047 | rule applies to this path, then apply it. */ |
| 1048 | char *rewritten_fullname = rewrite_source_path (*fullname); |
| 1049 | |
| 1050 | if (rewritten_fullname != NULL) |
| 1051 | { |
| 1052 | xfree (*fullname); |
| 1053 | *fullname = rewritten_fullname; |
| 1054 | } |
| 1055 | |
| 1056 | result = gdb_open_cloexec (*fullname, OPEN_MODE, 0); |
| 1057 | if (result >= 0) |
| 1058 | { |
| 1059 | char *lpath = gdb_realpath (*fullname); |
| 1060 | |
| 1061 | xfree (*fullname); |
| 1062 | *fullname = lpath; |
| 1063 | return result; |
| 1064 | } |
| 1065 | |
| 1066 | /* Didn't work -- free old one, try again. */ |
| 1067 | xfree (*fullname); |
| 1068 | *fullname = NULL; |
| 1069 | } |
| 1070 | |
| 1071 | cleanup = make_cleanup (null_cleanup, NULL); |
| 1072 | |
| 1073 | if (dirname != NULL) |
| 1074 | { |
| 1075 | /* If necessary, rewrite the compilation directory name according |
| 1076 | to the source path substitution rules specified by the user. */ |
| 1077 | |
| 1078 | char *rewritten_dirname = rewrite_source_path (dirname); |
| 1079 | |
| 1080 | if (rewritten_dirname != NULL) |
| 1081 | { |
| 1082 | make_cleanup (xfree, rewritten_dirname); |
| 1083 | dirname = rewritten_dirname; |
| 1084 | } |
| 1085 | |
| 1086 | /* Replace a path entry of $cdir with the compilation directory |
| 1087 | name. */ |
| 1088 | #define cdir_len 5 |
| 1089 | /* We cast strstr's result in case an ANSIhole has made it const, |
| 1090 | which produces a "required warning" when assigned to a nonconst. */ |
| 1091 | p = (char *) strstr (source_path, "$cdir"); |
| 1092 | if (p && (p == path || p[-1] == DIRNAME_SEPARATOR) |
| 1093 | && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0')) |
| 1094 | { |
| 1095 | int len; |
| 1096 | |
| 1097 | path = (char *) |
| 1098 | alloca (strlen (source_path) + 1 + strlen (dirname) + 1); |
| 1099 | len = p - source_path; |
| 1100 | strncpy (path, source_path, len); /* Before $cdir */ |
| 1101 | strcpy (path + len, dirname); /* new stuff */ |
| 1102 | strcat (path + len, source_path + len + cdir_len); /* After |
| 1103 | $cdir */ |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | if (IS_ABSOLUTE_PATH (filename)) |
| 1108 | { |
| 1109 | /* If filename is absolute path, try the source path |
| 1110 | substitution on it. */ |
| 1111 | char *rewritten_filename = rewrite_source_path (filename); |
| 1112 | |
| 1113 | if (rewritten_filename != NULL) |
| 1114 | { |
| 1115 | make_cleanup (xfree, rewritten_filename); |
| 1116 | filename = rewritten_filename; |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, filename, |
| 1121 | OPEN_MODE, fullname); |
| 1122 | if (result < 0) |
| 1123 | { |
| 1124 | /* Didn't work. Try using just the basename. */ |
| 1125 | p = lbasename (filename); |
| 1126 | if (p != filename) |
| 1127 | result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, p, |
| 1128 | OPEN_MODE, fullname); |
| 1129 | } |
| 1130 | |
| 1131 | do_cleanups (cleanup); |
| 1132 | return result; |
| 1133 | } |
| 1134 | |
| 1135 | /* Open a source file given a symtab S. Returns a file descriptor or |
| 1136 | negative number for error. |
| 1137 | |
| 1138 | This function is a convience function to find_and_open_source. */ |
| 1139 | |
| 1140 | int |
| 1141 | open_source_file (struct symtab *s) |
| 1142 | { |
| 1143 | if (!s) |
| 1144 | return -1; |
| 1145 | |
| 1146 | return find_and_open_source (s->filename, SYMTAB_DIRNAME (s), &s->fullname); |
| 1147 | } |
| 1148 | |
| 1149 | /* Finds the fullname that a symtab represents. |
| 1150 | |
| 1151 | This functions finds the fullname and saves it in s->fullname. |
| 1152 | It will also return the value. |
| 1153 | |
| 1154 | If this function fails to find the file that this symtab represents, |
| 1155 | the expected fullname is used. Therefore the files does not have to |
| 1156 | exist. */ |
| 1157 | |
| 1158 | const char * |
| 1159 | symtab_to_fullname (struct symtab *s) |
| 1160 | { |
| 1161 | /* Use cached copy if we have it. |
| 1162 | We rely on forget_cached_source_info being called appropriately |
| 1163 | to handle cases like the file being moved. */ |
| 1164 | if (s->fullname == NULL) |
| 1165 | { |
| 1166 | int fd = find_and_open_source (s->filename, SYMTAB_DIRNAME (s), |
| 1167 | &s->fullname); |
| 1168 | |
| 1169 | if (fd >= 0) |
| 1170 | close (fd); |
| 1171 | else |
| 1172 | { |
| 1173 | char *fullname; |
| 1174 | struct cleanup *back_to; |
| 1175 | |
| 1176 | /* rewrite_source_path would be applied by find_and_open_source, we |
| 1177 | should report the pathname where GDB tried to find the file. */ |
| 1178 | |
| 1179 | if (SYMTAB_DIRNAME (s) == NULL || IS_ABSOLUTE_PATH (s->filename)) |
| 1180 | fullname = xstrdup (s->filename); |
| 1181 | else |
| 1182 | fullname = concat (SYMTAB_DIRNAME (s), SLASH_STRING, |
| 1183 | s->filename, (char *) NULL); |
| 1184 | |
| 1185 | back_to = make_cleanup (xfree, fullname); |
| 1186 | s->fullname = rewrite_source_path (fullname); |
| 1187 | if (s->fullname == NULL) |
| 1188 | s->fullname = xstrdup (fullname); |
| 1189 | do_cleanups (back_to); |
| 1190 | } |
| 1191 | } |
| 1192 | |
| 1193 | return s->fullname; |
| 1194 | } |
| 1195 | |
| 1196 | /* See commentary in source.h. */ |
| 1197 | |
| 1198 | const char * |
| 1199 | symtab_to_filename_for_display (struct symtab *symtab) |
| 1200 | { |
| 1201 | if (filename_display_string == filename_display_basename) |
| 1202 | return lbasename (symtab->filename); |
| 1203 | else if (filename_display_string == filename_display_absolute) |
| 1204 | return symtab_to_fullname (symtab); |
| 1205 | else if (filename_display_string == filename_display_relative) |
| 1206 | return symtab->filename; |
| 1207 | else |
| 1208 | internal_error (__FILE__, __LINE__, _("invalid filename_display_string")); |
| 1209 | } |
| 1210 | \f |
| 1211 | /* Create and initialize the table S->line_charpos that records |
| 1212 | the positions of the lines in the source file, which is assumed |
| 1213 | to be open on descriptor DESC. |
| 1214 | All set S->nlines to the number of such lines. */ |
| 1215 | |
| 1216 | void |
| 1217 | find_source_lines (struct symtab *s, int desc) |
| 1218 | { |
| 1219 | struct stat st; |
| 1220 | char *data, *p, *end; |
| 1221 | int nlines = 0; |
| 1222 | int lines_allocated = 1000; |
| 1223 | int *line_charpos; |
| 1224 | long mtime = 0; |
| 1225 | int size; |
| 1226 | |
| 1227 | gdb_assert (s); |
| 1228 | line_charpos = XNEWVEC (int, lines_allocated); |
| 1229 | if (fstat (desc, &st) < 0) |
| 1230 | perror_with_name (symtab_to_filename_for_display (s)); |
| 1231 | |
| 1232 | if (SYMTAB_OBJFILE (s) != NULL && SYMTAB_OBJFILE (s)->obfd != NULL) |
| 1233 | mtime = SYMTAB_OBJFILE (s)->mtime; |
| 1234 | else if (exec_bfd) |
| 1235 | mtime = exec_bfd_mtime; |
| 1236 | |
| 1237 | if (mtime && mtime < st.st_mtime) |
| 1238 | warning (_("Source file is more recent than executable.")); |
| 1239 | |
| 1240 | { |
| 1241 | struct cleanup *old_cleanups; |
| 1242 | |
| 1243 | /* st_size might be a large type, but we only support source files whose |
| 1244 | size fits in an int. */ |
| 1245 | size = (int) st.st_size; |
| 1246 | |
| 1247 | /* Use malloc, not alloca, because this may be pretty large, and we may |
| 1248 | run into various kinds of limits on stack size. */ |
| 1249 | data = (char *) xmalloc (size); |
| 1250 | old_cleanups = make_cleanup (xfree, data); |
| 1251 | |
| 1252 | /* Reassign `size' to result of read for systems where \r\n -> \n. */ |
| 1253 | size = myread (desc, data, size); |
| 1254 | if (size < 0) |
| 1255 | perror_with_name (symtab_to_filename_for_display (s)); |
| 1256 | end = data + size; |
| 1257 | p = data; |
| 1258 | line_charpos[0] = 0; |
| 1259 | nlines = 1; |
| 1260 | while (p != end) |
| 1261 | { |
| 1262 | if (*p++ == '\n' |
| 1263 | /* A newline at the end does not start a new line. */ |
| 1264 | && p != end) |
| 1265 | { |
| 1266 | if (nlines == lines_allocated) |
| 1267 | { |
| 1268 | lines_allocated *= 2; |
| 1269 | line_charpos = |
| 1270 | (int *) xrealloc ((char *) line_charpos, |
| 1271 | sizeof (int) * lines_allocated); |
| 1272 | } |
| 1273 | line_charpos[nlines++] = p - data; |
| 1274 | } |
| 1275 | } |
| 1276 | do_cleanups (old_cleanups); |
| 1277 | } |
| 1278 | |
| 1279 | s->nlines = nlines; |
| 1280 | s->line_charpos = |
| 1281 | (int *) xrealloc ((char *) line_charpos, nlines * sizeof (int)); |
| 1282 | |
| 1283 | } |
| 1284 | |
| 1285 | \f |
| 1286 | |
| 1287 | /* Get full pathname and line number positions for a symtab. |
| 1288 | Return nonzero if line numbers may have changed. |
| 1289 | Set *FULLNAME to actual name of the file as found by `openp', |
| 1290 | or to 0 if the file is not found. */ |
| 1291 | |
| 1292 | static int |
| 1293 | get_filename_and_charpos (struct symtab *s, char **fullname) |
| 1294 | { |
| 1295 | int desc, linenums_changed = 0; |
| 1296 | struct cleanup *cleanups; |
| 1297 | |
| 1298 | desc = open_source_file (s); |
| 1299 | if (desc < 0) |
| 1300 | { |
| 1301 | if (fullname) |
| 1302 | *fullname = NULL; |
| 1303 | return 0; |
| 1304 | } |
| 1305 | cleanups = make_cleanup_close (desc); |
| 1306 | if (fullname) |
| 1307 | *fullname = s->fullname; |
| 1308 | if (s->line_charpos == 0) |
| 1309 | linenums_changed = 1; |
| 1310 | if (linenums_changed) |
| 1311 | find_source_lines (s, desc); |
| 1312 | do_cleanups (cleanups); |
| 1313 | return linenums_changed; |
| 1314 | } |
| 1315 | |
| 1316 | /* Print text describing the full name of the source file S |
| 1317 | and the line number LINE and its corresponding character position. |
| 1318 | The text starts with two Ctrl-z so that the Emacs-GDB interface |
| 1319 | can easily find it. |
| 1320 | |
| 1321 | MID_STATEMENT is nonzero if the PC is not at the beginning of that line. |
| 1322 | |
| 1323 | Return 1 if successful, 0 if could not find the file. */ |
| 1324 | |
| 1325 | int |
| 1326 | identify_source_line (struct symtab *s, int line, int mid_statement, |
| 1327 | CORE_ADDR pc) |
| 1328 | { |
| 1329 | if (s->line_charpos == 0) |
| 1330 | get_filename_and_charpos (s, (char **) NULL); |
| 1331 | if (s->fullname == 0) |
| 1332 | return 0; |
| 1333 | if (line > s->nlines) |
| 1334 | /* Don't index off the end of the line_charpos array. */ |
| 1335 | return 0; |
| 1336 | annotate_source (s->fullname, line, s->line_charpos[line - 1], |
| 1337 | mid_statement, get_objfile_arch (SYMTAB_OBJFILE (s)), pc); |
| 1338 | |
| 1339 | current_source_line = line; |
| 1340 | current_source_symtab = s; |
| 1341 | clear_lines_listed_range (); |
| 1342 | return 1; |
| 1343 | } |
| 1344 | \f |
| 1345 | |
| 1346 | /* Print source lines from the file of symtab S, |
| 1347 | starting with line number LINE and stopping before line number STOPLINE. */ |
| 1348 | |
| 1349 | static void |
| 1350 | print_source_lines_base (struct symtab *s, int line, int stopline, |
| 1351 | print_source_lines_flags flags) |
| 1352 | { |
| 1353 | int c; |
| 1354 | int desc; |
| 1355 | int noprint = 0; |
| 1356 | FILE *stream; |
| 1357 | int nlines = stopline - line; |
| 1358 | struct cleanup *cleanup; |
| 1359 | struct ui_out *uiout = current_uiout; |
| 1360 | |
| 1361 | /* Regardless of whether we can open the file, set current_source_symtab. */ |
| 1362 | current_source_symtab = s; |
| 1363 | current_source_line = line; |
| 1364 | first_line_listed = line; |
| 1365 | |
| 1366 | /* If printing of source lines is disabled, just print file and line |
| 1367 | number. */ |
| 1368 | if (uiout->test_flags (ui_source_list)) |
| 1369 | { |
| 1370 | /* Only prints "No such file or directory" once. */ |
| 1371 | if ((s != last_source_visited) || (!last_source_error)) |
| 1372 | { |
| 1373 | last_source_visited = s; |
| 1374 | desc = open_source_file (s); |
| 1375 | } |
| 1376 | else |
| 1377 | { |
| 1378 | desc = last_source_error; |
| 1379 | flags |= PRINT_SOURCE_LINES_NOERROR; |
| 1380 | } |
| 1381 | } |
| 1382 | else |
| 1383 | { |
| 1384 | desc = last_source_error; |
| 1385 | flags |= PRINT_SOURCE_LINES_NOERROR; |
| 1386 | noprint = 1; |
| 1387 | } |
| 1388 | |
| 1389 | if (desc < 0 || noprint) |
| 1390 | { |
| 1391 | last_source_error = desc; |
| 1392 | |
| 1393 | if (!(flags & PRINT_SOURCE_LINES_NOERROR)) |
| 1394 | { |
| 1395 | const char *filename = symtab_to_filename_for_display (s); |
| 1396 | int len = strlen (filename) + 100; |
| 1397 | char *name = (char *) alloca (len); |
| 1398 | |
| 1399 | xsnprintf (name, len, "%d\t%s", line, filename); |
| 1400 | print_sys_errmsg (name, errno); |
| 1401 | } |
| 1402 | else |
| 1403 | { |
| 1404 | uiout->field_int ("line", line); |
| 1405 | uiout->text ("\tin "); |
| 1406 | |
| 1407 | /* CLI expects only the "file" field. TUI expects only the |
| 1408 | "fullname" field (and TUI does break if "file" is printed). |
| 1409 | MI expects both fields. ui_source_list is set only for CLI, |
| 1410 | not for TUI. */ |
| 1411 | if (uiout->is_mi_like_p () || uiout->test_flags (ui_source_list)) |
| 1412 | uiout->field_string ("file", symtab_to_filename_for_display (s)); |
| 1413 | if (uiout->is_mi_like_p () || !uiout->test_flags (ui_source_list)) |
| 1414 | { |
| 1415 | const char *s_fullname = symtab_to_fullname (s); |
| 1416 | char *local_fullname; |
| 1417 | |
| 1418 | /* ui_out_field_string may free S_FULLNAME by calling |
| 1419 | open_source_file for it again. See e.g., |
| 1420 | tui_field_string->tui_show_source. */ |
| 1421 | local_fullname = (char *) alloca (strlen (s_fullname) + 1); |
| 1422 | strcpy (local_fullname, s_fullname); |
| 1423 | |
| 1424 | uiout->field_string ("fullname", local_fullname); |
| 1425 | } |
| 1426 | |
| 1427 | uiout->text ("\n"); |
| 1428 | } |
| 1429 | |
| 1430 | return; |
| 1431 | } |
| 1432 | |
| 1433 | last_source_error = 0; |
| 1434 | |
| 1435 | if (s->line_charpos == 0) |
| 1436 | find_source_lines (s, desc); |
| 1437 | |
| 1438 | if (line < 1 || line > s->nlines) |
| 1439 | { |
| 1440 | close (desc); |
| 1441 | error (_("Line number %d out of range; %s has %d lines."), |
| 1442 | line, symtab_to_filename_for_display (s), s->nlines); |
| 1443 | } |
| 1444 | |
| 1445 | if (lseek (desc, s->line_charpos[line - 1], 0) < 0) |
| 1446 | { |
| 1447 | close (desc); |
| 1448 | perror_with_name (symtab_to_filename_for_display (s)); |
| 1449 | } |
| 1450 | |
| 1451 | stream = fdopen (desc, FDOPEN_MODE); |
| 1452 | clearerr (stream); |
| 1453 | cleanup = make_cleanup_fclose (stream); |
| 1454 | |
| 1455 | while (nlines-- > 0) |
| 1456 | { |
| 1457 | char buf[20]; |
| 1458 | |
| 1459 | c = fgetc (stream); |
| 1460 | if (c == EOF) |
| 1461 | break; |
| 1462 | last_line_listed = current_source_line; |
| 1463 | if (flags & PRINT_SOURCE_LINES_FILENAME) |
| 1464 | { |
| 1465 | uiout->text (symtab_to_filename_for_display (s)); |
| 1466 | uiout->text (":"); |
| 1467 | } |
| 1468 | xsnprintf (buf, sizeof (buf), "%d\t", current_source_line++); |
| 1469 | uiout->text (buf); |
| 1470 | do |
| 1471 | { |
| 1472 | if (c < 040 && c != '\t' && c != '\n' && c != '\r') |
| 1473 | { |
| 1474 | xsnprintf (buf, sizeof (buf), "^%c", c + 0100); |
| 1475 | uiout->text (buf); |
| 1476 | } |
| 1477 | else if (c == 0177) |
| 1478 | uiout->text ("^?"); |
| 1479 | else if (c == '\r') |
| 1480 | { |
| 1481 | /* Skip a \r character, but only before a \n. */ |
| 1482 | int c1 = fgetc (stream); |
| 1483 | |
| 1484 | if (c1 != '\n') |
| 1485 | printf_filtered ("^%c", c + 0100); |
| 1486 | if (c1 != EOF) |
| 1487 | ungetc (c1, stream); |
| 1488 | } |
| 1489 | else |
| 1490 | { |
| 1491 | xsnprintf (buf, sizeof (buf), "%c", c); |
| 1492 | uiout->text (buf); |
| 1493 | } |
| 1494 | } |
| 1495 | while (c != '\n' && (c = fgetc (stream)) >= 0); |
| 1496 | } |
| 1497 | |
| 1498 | do_cleanups (cleanup); |
| 1499 | } |
| 1500 | \f |
| 1501 | /* Show source lines from the file of symtab S, starting with line |
| 1502 | number LINE and stopping before line number STOPLINE. If this is |
| 1503 | not the command line version, then the source is shown in the source |
| 1504 | window otherwise it is simply printed. */ |
| 1505 | |
| 1506 | void |
| 1507 | print_source_lines (struct symtab *s, int line, int stopline, |
| 1508 | print_source_lines_flags flags) |
| 1509 | { |
| 1510 | print_source_lines_base (s, line, stopline, flags); |
| 1511 | } |
| 1512 | \f |
| 1513 | /* Print info on range of pc's in a specified line. */ |
| 1514 | |
| 1515 | static void |
| 1516 | line_info (char *arg, int from_tty) |
| 1517 | { |
| 1518 | struct symtabs_and_lines sals; |
| 1519 | struct symtab_and_line sal; |
| 1520 | CORE_ADDR start_pc, end_pc; |
| 1521 | int i; |
| 1522 | struct cleanup *cleanups; |
| 1523 | |
| 1524 | init_sal (&sal); /* initialize to zeroes */ |
| 1525 | |
| 1526 | if (arg == 0) |
| 1527 | { |
| 1528 | sal.symtab = current_source_symtab; |
| 1529 | sal.pspace = current_program_space; |
| 1530 | if (last_line_listed != 0) |
| 1531 | sal.line = last_line_listed; |
| 1532 | else |
| 1533 | sal.line = current_source_line; |
| 1534 | |
| 1535 | sals.nelts = 1; |
| 1536 | sals.sals = XNEW (struct symtab_and_line); |
| 1537 | sals.sals[0] = sal; |
| 1538 | } |
| 1539 | else |
| 1540 | { |
| 1541 | sals = decode_line_with_last_displayed (arg, DECODE_LINE_LIST_MODE); |
| 1542 | |
| 1543 | dont_repeat (); |
| 1544 | } |
| 1545 | |
| 1546 | cleanups = make_cleanup (xfree, sals.sals); |
| 1547 | |
| 1548 | /* C++ More than one line may have been specified, as when the user |
| 1549 | specifies an overloaded function name. Print info on them all. */ |
| 1550 | for (i = 0; i < sals.nelts; i++) |
| 1551 | { |
| 1552 | sal = sals.sals[i]; |
| 1553 | if (sal.pspace != current_program_space) |
| 1554 | continue; |
| 1555 | |
| 1556 | if (sal.symtab == 0) |
| 1557 | { |
| 1558 | struct gdbarch *gdbarch = get_current_arch (); |
| 1559 | |
| 1560 | printf_filtered (_("No line number information available")); |
| 1561 | if (sal.pc != 0) |
| 1562 | { |
| 1563 | /* This is useful for "info line *0x7f34". If we can't tell the |
| 1564 | user about a source line, at least let them have the symbolic |
| 1565 | address. */ |
| 1566 | printf_filtered (" for address "); |
| 1567 | wrap_here (" "); |
| 1568 | print_address (gdbarch, sal.pc, gdb_stdout); |
| 1569 | } |
| 1570 | else |
| 1571 | printf_filtered ("."); |
| 1572 | printf_filtered ("\n"); |
| 1573 | } |
| 1574 | else if (sal.line > 0 |
| 1575 | && find_line_pc_range (sal, &start_pc, &end_pc)) |
| 1576 | { |
| 1577 | struct gdbarch *gdbarch |
| 1578 | = get_objfile_arch (SYMTAB_OBJFILE (sal.symtab)); |
| 1579 | |
| 1580 | if (start_pc == end_pc) |
| 1581 | { |
| 1582 | printf_filtered ("Line %d of \"%s\"", |
| 1583 | sal.line, |
| 1584 | symtab_to_filename_for_display (sal.symtab)); |
| 1585 | wrap_here (" "); |
| 1586 | printf_filtered (" is at address "); |
| 1587 | print_address (gdbarch, start_pc, gdb_stdout); |
| 1588 | wrap_here (" "); |
| 1589 | printf_filtered (" but contains no code.\n"); |
| 1590 | } |
| 1591 | else |
| 1592 | { |
| 1593 | printf_filtered ("Line %d of \"%s\"", |
| 1594 | sal.line, |
| 1595 | symtab_to_filename_for_display (sal.symtab)); |
| 1596 | wrap_here (" "); |
| 1597 | printf_filtered (" starts at address "); |
| 1598 | print_address (gdbarch, start_pc, gdb_stdout); |
| 1599 | wrap_here (" "); |
| 1600 | printf_filtered (" and ends at "); |
| 1601 | print_address (gdbarch, end_pc, gdb_stdout); |
| 1602 | printf_filtered (".\n"); |
| 1603 | } |
| 1604 | |
| 1605 | /* x/i should display this line's code. */ |
| 1606 | set_next_address (gdbarch, start_pc); |
| 1607 | |
| 1608 | /* Repeating "info line" should do the following line. */ |
| 1609 | last_line_listed = sal.line + 1; |
| 1610 | |
| 1611 | /* If this is the only line, show the source code. If it could |
| 1612 | not find the file, don't do anything special. */ |
| 1613 | if (annotation_level && sals.nelts == 1) |
| 1614 | identify_source_line (sal.symtab, sal.line, 0, start_pc); |
| 1615 | } |
| 1616 | else |
| 1617 | /* Is there any case in which we get here, and have an address |
| 1618 | which the user would want to see? If we have debugging symbols |
| 1619 | and no line numbers? */ |
| 1620 | printf_filtered (_("Line number %d is out of range for \"%s\".\n"), |
| 1621 | sal.line, symtab_to_filename_for_display (sal.symtab)); |
| 1622 | } |
| 1623 | do_cleanups (cleanups); |
| 1624 | } |
| 1625 | \f |
| 1626 | /* Commands to search the source file for a regexp. */ |
| 1627 | |
| 1628 | static void |
| 1629 | forward_search_command (char *regex, int from_tty) |
| 1630 | { |
| 1631 | int c; |
| 1632 | int desc; |
| 1633 | FILE *stream; |
| 1634 | int line; |
| 1635 | char *msg; |
| 1636 | struct cleanup *cleanups; |
| 1637 | |
| 1638 | line = last_line_listed + 1; |
| 1639 | |
| 1640 | msg = (char *) re_comp (regex); |
| 1641 | if (msg) |
| 1642 | error (("%s"), msg); |
| 1643 | |
| 1644 | if (current_source_symtab == 0) |
| 1645 | select_source_symtab (0); |
| 1646 | |
| 1647 | desc = open_source_file (current_source_symtab); |
| 1648 | if (desc < 0) |
| 1649 | perror_with_name (symtab_to_filename_for_display (current_source_symtab)); |
| 1650 | cleanups = make_cleanup_close (desc); |
| 1651 | |
| 1652 | if (current_source_symtab->line_charpos == 0) |
| 1653 | find_source_lines (current_source_symtab, desc); |
| 1654 | |
| 1655 | if (line < 1 || line > current_source_symtab->nlines) |
| 1656 | error (_("Expression not found")); |
| 1657 | |
| 1658 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1659 | perror_with_name (symtab_to_filename_for_display (current_source_symtab)); |
| 1660 | |
| 1661 | discard_cleanups (cleanups); |
| 1662 | stream = fdopen (desc, FDOPEN_MODE); |
| 1663 | clearerr (stream); |
| 1664 | cleanups = make_cleanup_fclose (stream); |
| 1665 | while (1) |
| 1666 | { |
| 1667 | static char *buf = NULL; |
| 1668 | char *p; |
| 1669 | int cursize, newsize; |
| 1670 | |
| 1671 | cursize = 256; |
| 1672 | buf = (char *) xmalloc (cursize); |
| 1673 | p = buf; |
| 1674 | |
| 1675 | c = fgetc (stream); |
| 1676 | if (c == EOF) |
| 1677 | break; |
| 1678 | do |
| 1679 | { |
| 1680 | *p++ = c; |
| 1681 | if (p - buf == cursize) |
| 1682 | { |
| 1683 | newsize = cursize + cursize / 2; |
| 1684 | buf = (char *) xrealloc (buf, newsize); |
| 1685 | p = buf + cursize; |
| 1686 | cursize = newsize; |
| 1687 | } |
| 1688 | } |
| 1689 | while (c != '\n' && (c = fgetc (stream)) >= 0); |
| 1690 | |
| 1691 | /* Remove the \r, if any, at the end of the line, otherwise |
| 1692 | regular expressions that end with $ or \n won't work. */ |
| 1693 | if (p - buf > 1 && p[-2] == '\r') |
| 1694 | { |
| 1695 | p--; |
| 1696 | p[-1] = '\n'; |
| 1697 | } |
| 1698 | |
| 1699 | /* We now have a source line in buf, null terminate and match. */ |
| 1700 | *p = 0; |
| 1701 | if (re_exec (buf) > 0) |
| 1702 | { |
| 1703 | /* Match! */ |
| 1704 | do_cleanups (cleanups); |
| 1705 | print_source_lines (current_source_symtab, line, line + 1, 0); |
| 1706 | set_internalvar_integer (lookup_internalvar ("_"), line); |
| 1707 | current_source_line = std::max (line - lines_to_list / 2, 1); |
| 1708 | return; |
| 1709 | } |
| 1710 | line++; |
| 1711 | } |
| 1712 | |
| 1713 | printf_filtered (_("Expression not found\n")); |
| 1714 | do_cleanups (cleanups); |
| 1715 | } |
| 1716 | |
| 1717 | static void |
| 1718 | reverse_search_command (char *regex, int from_tty) |
| 1719 | { |
| 1720 | int c; |
| 1721 | int desc; |
| 1722 | FILE *stream; |
| 1723 | int line; |
| 1724 | char *msg; |
| 1725 | struct cleanup *cleanups; |
| 1726 | |
| 1727 | line = last_line_listed - 1; |
| 1728 | |
| 1729 | msg = (char *) re_comp (regex); |
| 1730 | if (msg) |
| 1731 | error (("%s"), msg); |
| 1732 | |
| 1733 | if (current_source_symtab == 0) |
| 1734 | select_source_symtab (0); |
| 1735 | |
| 1736 | desc = open_source_file (current_source_symtab); |
| 1737 | if (desc < 0) |
| 1738 | perror_with_name (symtab_to_filename_for_display (current_source_symtab)); |
| 1739 | cleanups = make_cleanup_close (desc); |
| 1740 | |
| 1741 | if (current_source_symtab->line_charpos == 0) |
| 1742 | find_source_lines (current_source_symtab, desc); |
| 1743 | |
| 1744 | if (line < 1 || line > current_source_symtab->nlines) |
| 1745 | error (_("Expression not found")); |
| 1746 | |
| 1747 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1748 | perror_with_name (symtab_to_filename_for_display (current_source_symtab)); |
| 1749 | |
| 1750 | discard_cleanups (cleanups); |
| 1751 | stream = fdopen (desc, FDOPEN_MODE); |
| 1752 | clearerr (stream); |
| 1753 | cleanups = make_cleanup_fclose (stream); |
| 1754 | while (line > 1) |
| 1755 | { |
| 1756 | /* FIXME!!! We walk right off the end of buf if we get a long line!!! */ |
| 1757 | char buf[4096]; /* Should be reasonable??? */ |
| 1758 | char *p = buf; |
| 1759 | |
| 1760 | c = fgetc (stream); |
| 1761 | if (c == EOF) |
| 1762 | break; |
| 1763 | do |
| 1764 | { |
| 1765 | *p++ = c; |
| 1766 | } |
| 1767 | while (c != '\n' && (c = fgetc (stream)) >= 0); |
| 1768 | |
| 1769 | /* Remove the \r, if any, at the end of the line, otherwise |
| 1770 | regular expressions that end with $ or \n won't work. */ |
| 1771 | if (p - buf > 1 && p[-2] == '\r') |
| 1772 | { |
| 1773 | p--; |
| 1774 | p[-1] = '\n'; |
| 1775 | } |
| 1776 | |
| 1777 | /* We now have a source line in buf; null terminate and match. */ |
| 1778 | *p = 0; |
| 1779 | if (re_exec (buf) > 0) |
| 1780 | { |
| 1781 | /* Match! */ |
| 1782 | do_cleanups (cleanups); |
| 1783 | print_source_lines (current_source_symtab, line, line + 1, 0); |
| 1784 | set_internalvar_integer (lookup_internalvar ("_"), line); |
| 1785 | current_source_line = std::max (line - lines_to_list / 2, 1); |
| 1786 | return; |
| 1787 | } |
| 1788 | line--; |
| 1789 | if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1790 | { |
| 1791 | const char *filename; |
| 1792 | |
| 1793 | do_cleanups (cleanups); |
| 1794 | filename = symtab_to_filename_for_display (current_source_symtab); |
| 1795 | perror_with_name (filename); |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | printf_filtered (_("Expression not found\n")); |
| 1800 | do_cleanups (cleanups); |
| 1801 | return; |
| 1802 | } |
| 1803 | |
| 1804 | /* If the last character of PATH is a directory separator, then strip it. */ |
| 1805 | |
| 1806 | static void |
| 1807 | strip_trailing_directory_separator (char *path) |
| 1808 | { |
| 1809 | const int last = strlen (path) - 1; |
| 1810 | |
| 1811 | if (last < 0) |
| 1812 | return; /* No stripping is needed if PATH is the empty string. */ |
| 1813 | |
| 1814 | if (IS_DIR_SEPARATOR (path[last])) |
| 1815 | path[last] = '\0'; |
| 1816 | } |
| 1817 | |
| 1818 | /* Return the path substitution rule that matches FROM. |
| 1819 | Return NULL if no rule matches. */ |
| 1820 | |
| 1821 | static struct substitute_path_rule * |
| 1822 | find_substitute_path_rule (const char *from) |
| 1823 | { |
| 1824 | struct substitute_path_rule *rule = substitute_path_rules; |
| 1825 | |
| 1826 | while (rule != NULL) |
| 1827 | { |
| 1828 | if (FILENAME_CMP (rule->from, from) == 0) |
| 1829 | return rule; |
| 1830 | rule = rule->next; |
| 1831 | } |
| 1832 | |
| 1833 | return NULL; |
| 1834 | } |
| 1835 | |
| 1836 | /* Add a new substitute-path rule at the end of the current list of rules. |
| 1837 | The new rule will replace FROM into TO. */ |
| 1838 | |
| 1839 | void |
| 1840 | add_substitute_path_rule (char *from, char *to) |
| 1841 | { |
| 1842 | struct substitute_path_rule *rule; |
| 1843 | struct substitute_path_rule *new_rule = XNEW (struct substitute_path_rule); |
| 1844 | |
| 1845 | new_rule->from = xstrdup (from); |
| 1846 | new_rule->to = xstrdup (to); |
| 1847 | new_rule->next = NULL; |
| 1848 | |
| 1849 | /* If the list of rules are empty, then insert the new rule |
| 1850 | at the head of the list. */ |
| 1851 | |
| 1852 | if (substitute_path_rules == NULL) |
| 1853 | { |
| 1854 | substitute_path_rules = new_rule; |
| 1855 | return; |
| 1856 | } |
| 1857 | |
| 1858 | /* Otherwise, skip to the last rule in our list and then append |
| 1859 | the new rule. */ |
| 1860 | |
| 1861 | rule = substitute_path_rules; |
| 1862 | while (rule->next != NULL) |
| 1863 | rule = rule->next; |
| 1864 | |
| 1865 | rule->next = new_rule; |
| 1866 | } |
| 1867 | |
| 1868 | /* Remove the given source path substitution rule from the current list |
| 1869 | of rules. The memory allocated for that rule is also deallocated. */ |
| 1870 | |
| 1871 | static void |
| 1872 | delete_substitute_path_rule (struct substitute_path_rule *rule) |
| 1873 | { |
| 1874 | if (rule == substitute_path_rules) |
| 1875 | substitute_path_rules = rule->next; |
| 1876 | else |
| 1877 | { |
| 1878 | struct substitute_path_rule *prev = substitute_path_rules; |
| 1879 | |
| 1880 | while (prev != NULL && prev->next != rule) |
| 1881 | prev = prev->next; |
| 1882 | |
| 1883 | gdb_assert (prev != NULL); |
| 1884 | |
| 1885 | prev->next = rule->next; |
| 1886 | } |
| 1887 | |
| 1888 | xfree (rule->from); |
| 1889 | xfree (rule->to); |
| 1890 | xfree (rule); |
| 1891 | } |
| 1892 | |
| 1893 | /* Implement the "show substitute-path" command. */ |
| 1894 | |
| 1895 | static void |
| 1896 | show_substitute_path_command (char *args, int from_tty) |
| 1897 | { |
| 1898 | struct substitute_path_rule *rule = substitute_path_rules; |
| 1899 | char **argv; |
| 1900 | char *from = NULL; |
| 1901 | struct cleanup *cleanup; |
| 1902 | |
| 1903 | argv = gdb_buildargv (args); |
| 1904 | cleanup = make_cleanup_freeargv (argv); |
| 1905 | |
| 1906 | /* We expect zero or one argument. */ |
| 1907 | |
| 1908 | if (argv != NULL && argv[0] != NULL && argv[1] != NULL) |
| 1909 | error (_("Too many arguments in command")); |
| 1910 | |
| 1911 | if (argv != NULL && argv[0] != NULL) |
| 1912 | from = argv[0]; |
| 1913 | |
| 1914 | /* Print the substitution rules. */ |
| 1915 | |
| 1916 | if (from != NULL) |
| 1917 | printf_filtered |
| 1918 | (_("Source path substitution rule matching `%s':\n"), from); |
| 1919 | else |
| 1920 | printf_filtered (_("List of all source path substitution rules:\n")); |
| 1921 | |
| 1922 | while (rule != NULL) |
| 1923 | { |
| 1924 | if (from == NULL || substitute_path_rule_matches (rule, from) != 0) |
| 1925 | printf_filtered (" `%s' -> `%s'.\n", rule->from, rule->to); |
| 1926 | rule = rule->next; |
| 1927 | } |
| 1928 | |
| 1929 | do_cleanups (cleanup); |
| 1930 | } |
| 1931 | |
| 1932 | /* Implement the "unset substitute-path" command. */ |
| 1933 | |
| 1934 | static void |
| 1935 | unset_substitute_path_command (char *args, int from_tty) |
| 1936 | { |
| 1937 | struct substitute_path_rule *rule = substitute_path_rules; |
| 1938 | char **argv = gdb_buildargv (args); |
| 1939 | char *from = NULL; |
| 1940 | int rule_found = 0; |
| 1941 | struct cleanup *cleanup; |
| 1942 | |
| 1943 | /* This function takes either 0 or 1 argument. */ |
| 1944 | |
| 1945 | cleanup = make_cleanup_freeargv (argv); |
| 1946 | if (argv != NULL && argv[0] != NULL && argv[1] != NULL) |
| 1947 | error (_("Incorrect usage, too many arguments in command")); |
| 1948 | |
| 1949 | if (argv != NULL && argv[0] != NULL) |
| 1950 | from = argv[0]; |
| 1951 | |
| 1952 | /* If the user asked for all the rules to be deleted, ask him |
| 1953 | to confirm and give him a chance to abort before the action |
| 1954 | is performed. */ |
| 1955 | |
| 1956 | if (from == NULL |
| 1957 | && !query (_("Delete all source path substitution rules? "))) |
| 1958 | error (_("Canceled")); |
| 1959 | |
| 1960 | /* Delete the rule matching the argument. No argument means that |
| 1961 | all rules should be deleted. */ |
| 1962 | |
| 1963 | while (rule != NULL) |
| 1964 | { |
| 1965 | struct substitute_path_rule *next = rule->next; |
| 1966 | |
| 1967 | if (from == NULL || FILENAME_CMP (from, rule->from) == 0) |
| 1968 | { |
| 1969 | delete_substitute_path_rule (rule); |
| 1970 | rule_found = 1; |
| 1971 | } |
| 1972 | |
| 1973 | rule = next; |
| 1974 | } |
| 1975 | |
| 1976 | /* If the user asked for a specific rule to be deleted but |
| 1977 | we could not find it, then report an error. */ |
| 1978 | |
| 1979 | if (from != NULL && !rule_found) |
| 1980 | error (_("No substitution rule defined for `%s'"), from); |
| 1981 | |
| 1982 | forget_cached_source_info (); |
| 1983 | |
| 1984 | do_cleanups (cleanup); |
| 1985 | } |
| 1986 | |
| 1987 | /* Add a new source path substitution rule. */ |
| 1988 | |
| 1989 | static void |
| 1990 | set_substitute_path_command (char *args, int from_tty) |
| 1991 | { |
| 1992 | char **argv; |
| 1993 | struct substitute_path_rule *rule; |
| 1994 | struct cleanup *cleanup; |
| 1995 | |
| 1996 | argv = gdb_buildargv (args); |
| 1997 | cleanup = make_cleanup_freeargv (argv); |
| 1998 | |
| 1999 | if (argv == NULL || argv[0] == NULL || argv [1] == NULL) |
| 2000 | error (_("Incorrect usage, too few arguments in command")); |
| 2001 | |
| 2002 | if (argv[2] != NULL) |
| 2003 | error (_("Incorrect usage, too many arguments in command")); |
| 2004 | |
| 2005 | if (*(argv[0]) == '\0') |
| 2006 | error (_("First argument must be at least one character long")); |
| 2007 | |
| 2008 | /* Strip any trailing directory separator character in either FROM |
| 2009 | or TO. The substitution rule already implicitly contains them. */ |
| 2010 | strip_trailing_directory_separator (argv[0]); |
| 2011 | strip_trailing_directory_separator (argv[1]); |
| 2012 | |
| 2013 | /* If a rule with the same "from" was previously defined, then |
| 2014 | delete it. This new rule replaces it. */ |
| 2015 | |
| 2016 | rule = find_substitute_path_rule (argv[0]); |
| 2017 | if (rule != NULL) |
| 2018 | delete_substitute_path_rule (rule); |
| 2019 | |
| 2020 | /* Insert the new substitution rule. */ |
| 2021 | |
| 2022 | add_substitute_path_rule (argv[0], argv[1]); |
| 2023 | forget_cached_source_info (); |
| 2024 | |
| 2025 | do_cleanups (cleanup); |
| 2026 | } |
| 2027 | |
| 2028 | \f |
| 2029 | void |
| 2030 | _initialize_source (void) |
| 2031 | { |
| 2032 | struct cmd_list_element *c; |
| 2033 | |
| 2034 | current_source_symtab = 0; |
| 2035 | init_source_path (); |
| 2036 | |
| 2037 | /* The intention is to use POSIX Basic Regular Expressions. |
| 2038 | Always use the GNU regex routine for consistency across all hosts. |
| 2039 | Our current GNU regex.c does not have all the POSIX features, so this is |
| 2040 | just an approximation. */ |
| 2041 | re_set_syntax (RE_SYNTAX_GREP); |
| 2042 | |
| 2043 | c = add_cmd ("directory", class_files, directory_command, _("\ |
| 2044 | Add directory DIR to beginning of search path for source files.\n\ |
| 2045 | Forget cached info on source file locations and line positions.\n\ |
| 2046 | DIR can also be $cwd for the current working directory, or $cdir for the\n\ |
| 2047 | directory in which the source file was compiled into object code.\n\ |
| 2048 | With no argument, reset the search path to $cdir:$cwd, the default."), |
| 2049 | &cmdlist); |
| 2050 | |
| 2051 | if (dbx_commands) |
| 2052 | add_com_alias ("use", "directory", class_files, 0); |
| 2053 | |
| 2054 | set_cmd_completer (c, filename_completer); |
| 2055 | |
| 2056 | add_setshow_optional_filename_cmd ("directories", |
| 2057 | class_files, |
| 2058 | &source_path, |
| 2059 | _("\ |
| 2060 | Set the search path for finding source files."), |
| 2061 | _("\ |
| 2062 | Show the search path for finding source files."), |
| 2063 | _("\ |
| 2064 | $cwd in the path means the current working directory.\n\ |
| 2065 | $cdir in the path means the compilation directory of the source file.\n\ |
| 2066 | GDB ensures the search path always ends with $cdir:$cwd by\n\ |
| 2067 | appending these directories if necessary.\n\ |
| 2068 | Setting the value to an empty string sets it to $cdir:$cwd, the default."), |
| 2069 | set_directories_command, |
| 2070 | show_directories_command, |
| 2071 | &setlist, &showlist); |
| 2072 | |
| 2073 | add_info ("source", source_info, |
| 2074 | _("Information about the current source file.")); |
| 2075 | |
| 2076 | add_info ("line", line_info, _("\ |
| 2077 | Core addresses of the code for a source line.\n\ |
| 2078 | Line can be specified as\n\ |
| 2079 | LINENUM, to list around that line in current file,\n\ |
| 2080 | FILE:LINENUM, to list around that line in that file,\n\ |
| 2081 | FUNCTION, to list around beginning of that function,\n\ |
| 2082 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ |
| 2083 | Default is to describe the last source line that was listed.\n\n\ |
| 2084 | This sets the default address for \"x\" to the line's first instruction\n\ |
| 2085 | so that \"x/i\" suffices to start examining the machine code.\n\ |
| 2086 | The address is also stored as the value of \"$_\".")); |
| 2087 | |
| 2088 | add_com ("forward-search", class_files, forward_search_command, _("\ |
| 2089 | Search for regular expression (see regex(3)) from last line listed.\n\ |
| 2090 | The matching line number is also stored as the value of \"$_\".")); |
| 2091 | add_com_alias ("search", "forward-search", class_files, 0); |
| 2092 | add_com_alias ("fo", "forward-search", class_files, 1); |
| 2093 | |
| 2094 | add_com ("reverse-search", class_files, reverse_search_command, _("\ |
| 2095 | Search backward for regular expression (see regex(3)) from last line listed.\n\ |
| 2096 | The matching line number is also stored as the value of \"$_\".")); |
| 2097 | add_com_alias ("rev", "reverse-search", class_files, 1); |
| 2098 | |
| 2099 | add_setshow_integer_cmd ("listsize", class_support, &lines_to_list, _("\ |
| 2100 | Set number of source lines gdb will list by default."), _("\ |
| 2101 | Show number of source lines gdb will list by default."), _("\ |
| 2102 | Use this to choose how many source lines the \"list\" displays (unless\n\ |
| 2103 | the \"list\" argument explicitly specifies some other number).\n\ |
| 2104 | A value of \"unlimited\", or zero, means there's no limit."), |
| 2105 | NULL, |
| 2106 | show_lines_to_list, |
| 2107 | &setlist, &showlist); |
| 2108 | |
| 2109 | add_cmd ("substitute-path", class_files, set_substitute_path_command, |
| 2110 | _("\ |
| 2111 | Usage: set substitute-path FROM TO\n\ |
| 2112 | Add a substitution rule replacing FROM into TO in source file names.\n\ |
| 2113 | If a substitution rule was previously set for FROM, the old rule\n\ |
| 2114 | is replaced by the new one."), |
| 2115 | &setlist); |
| 2116 | |
| 2117 | add_cmd ("substitute-path", class_files, unset_substitute_path_command, |
| 2118 | _("\ |
| 2119 | Usage: unset substitute-path [FROM]\n\ |
| 2120 | Delete the rule for substituting FROM in source file names. If FROM\n\ |
| 2121 | is not specified, all substituting rules are deleted.\n\ |
| 2122 | If the debugger cannot find a rule for FROM, it will display a warning."), |
| 2123 | &unsetlist); |
| 2124 | |
| 2125 | add_cmd ("substitute-path", class_files, show_substitute_path_command, |
| 2126 | _("\ |
| 2127 | Usage: show substitute-path [FROM]\n\ |
| 2128 | Print the rule for substituting FROM in source file names. If FROM\n\ |
| 2129 | is not specified, print all substitution rules."), |
| 2130 | &showlist); |
| 2131 | |
| 2132 | add_setshow_enum_cmd ("filename-display", class_files, |
| 2133 | filename_display_kind_names, |
| 2134 | &filename_display_string, _("\ |
| 2135 | Set how to display filenames."), _("\ |
| 2136 | Show how to display filenames."), _("\ |
| 2137 | filename-display can be:\n\ |
| 2138 | basename - display only basename of a filename\n\ |
| 2139 | relative - display a filename relative to the compilation directory\n\ |
| 2140 | absolute - display an absolute filename\n\ |
| 2141 | By default, relative filenames are displayed."), |
| 2142 | NULL, |
| 2143 | show_filename_display_string, |
| 2144 | &setlist, &showlist); |
| 2145 | |
| 2146 | } |