| 1 | /* List lines of source files for GDB, the GNU debugger. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 3 | 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "symtab.h" |
| 25 | #include "expression.h" |
| 26 | #include "language.h" |
| 27 | #include "command.h" |
| 28 | #include "source.h" |
| 29 | #include "gdbcmd.h" |
| 30 | #include "frame.h" |
| 31 | #include "value.h" |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include "gdb_string.h" |
| 35 | #include "gdb_stat.h" |
| 36 | #include <fcntl.h> |
| 37 | #include "gdbcore.h" |
| 38 | #include "gdb_regex.h" |
| 39 | #include "symfile.h" |
| 40 | #include "objfiles.h" |
| 41 | #include "annotate.h" |
| 42 | #include "gdbtypes.h" |
| 43 | #include "linespec.h" |
| 44 | #include "filenames.h" /* for DOSish file names */ |
| 45 | #include "completer.h" |
| 46 | #include "ui-out.h" |
| 47 | #include <readline/readline.h> |
| 48 | |
| 49 | #ifdef CRLF_SOURCE_FILES |
| 50 | |
| 51 | /* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the |
| 52 | host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is |
| 53 | much faster than defining LSEEK_NOT_LINEAR. */ |
| 54 | |
| 55 | #ifndef O_BINARY |
| 56 | #define O_BINARY 0 |
| 57 | #endif |
| 58 | |
| 59 | #define OPEN_MODE (O_RDONLY | O_BINARY) |
| 60 | #define FDOPEN_MODE FOPEN_RB |
| 61 | |
| 62 | #else /* ! defined (CRLF_SOURCE_FILES) */ |
| 63 | |
| 64 | #define OPEN_MODE O_RDONLY |
| 65 | #define FDOPEN_MODE FOPEN_RT |
| 66 | |
| 67 | #endif /* ! defined (CRLF_SOURCE_FILES) */ |
| 68 | |
| 69 | /* Prototypes for exported functions. */ |
| 70 | |
| 71 | void _initialize_source (void); |
| 72 | |
| 73 | /* Prototypes for local functions. */ |
| 74 | |
| 75 | static int get_filename_and_charpos (struct symtab *, char **); |
| 76 | |
| 77 | static void reverse_search_command (char *, int); |
| 78 | |
| 79 | static void forward_search_command (char *, int); |
| 80 | |
| 81 | static void line_info (char *, int); |
| 82 | |
| 83 | static void source_info (char *, int); |
| 84 | |
| 85 | static void show_directories (char *, int); |
| 86 | |
| 87 | /* Path of directories to search for source files. |
| 88 | Same format as the PATH environment variable's value. */ |
| 89 | |
| 90 | char *source_path; |
| 91 | |
| 92 | /* Symtab of default file for listing lines of. */ |
| 93 | |
| 94 | static struct symtab *current_source_symtab; |
| 95 | |
| 96 | /* Default next line to list. */ |
| 97 | |
| 98 | static int current_source_line; |
| 99 | |
| 100 | /* Default number of lines to print with commands like "list". |
| 101 | This is based on guessing how many long (i.e. more than chars_per_line |
| 102 | characters) lines there will be. To be completely correct, "list" |
| 103 | and friends should be rewritten to count characters and see where |
| 104 | things are wrapping, but that would be a fair amount of work. */ |
| 105 | |
| 106 | int lines_to_list = 10; |
| 107 | |
| 108 | /* Line number of last line printed. Default for various commands. |
| 109 | current_source_line is usually, but not always, the same as this. */ |
| 110 | |
| 111 | static int last_line_listed; |
| 112 | |
| 113 | /* First line number listed by last listing command. */ |
| 114 | |
| 115 | static int first_line_listed; |
| 116 | |
| 117 | /* Saves the name of the last source file visited and a possible error code. |
| 118 | Used to prevent repeating annoying "No such file or directories" msgs */ |
| 119 | |
| 120 | static struct symtab *last_source_visited = NULL; |
| 121 | static int last_source_error = 0; |
| 122 | \f |
| 123 | /* Return the first line listed by print_source_lines. |
| 124 | Used by command interpreters to request listing from |
| 125 | a previous point. */ |
| 126 | |
| 127 | int |
| 128 | get_first_line_listed (void) |
| 129 | { |
| 130 | return first_line_listed; |
| 131 | } |
| 132 | |
| 133 | /* Return the default number of lines to print with commands like the |
| 134 | cli "list". The caller of print_source_lines must use this to |
| 135 | calculate the end line and use it in the call to print_source_lines |
| 136 | as it does not automatically use this value. */ |
| 137 | |
| 138 | int |
| 139 | get_lines_to_list (void) |
| 140 | { |
| 141 | return lines_to_list; |
| 142 | } |
| 143 | |
| 144 | /* Return the current source file for listing and next line to list. |
| 145 | NOTE: The returned sal pc and end fields are not valid. */ |
| 146 | |
| 147 | struct symtab_and_line |
| 148 | get_current_source_symtab_and_line (void) |
| 149 | { |
| 150 | struct symtab_and_line cursal; |
| 151 | |
| 152 | cursal.symtab = current_source_symtab; |
| 153 | cursal.line = current_source_line; |
| 154 | cursal.pc = 0; |
| 155 | cursal.end = 0; |
| 156 | |
| 157 | return cursal; |
| 158 | } |
| 159 | |
| 160 | /* If the current source file for listing is not set, try and get a default. |
| 161 | Usually called before get_current_source_symtab_and_line() is called. |
| 162 | It may err out if a default cannot be determined. |
| 163 | We must be cautious about where it is called, as it can recurse as the |
| 164 | process of determining a new default may call the caller! |
| 165 | Use get_current_source_symtab_and_line only to get whatever |
| 166 | we have without erroring out or trying to get a default. */ |
| 167 | |
| 168 | void |
| 169 | set_default_source_symtab_and_line (void) |
| 170 | { |
| 171 | struct symtab_and_line cursal; |
| 172 | |
| 173 | if (!have_full_symbols () && !have_partial_symbols ()) |
| 174 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 175 | |
| 176 | /* Pull in a current source symtab if necessary */ |
| 177 | if (current_source_symtab == 0) |
| 178 | select_source_symtab (0); |
| 179 | } |
| 180 | |
| 181 | /* Return the current default file for listing and next line to list |
| 182 | (the returned sal pc and end fields are not valid.) |
| 183 | and set the current default to whatever is in SAL. |
| 184 | NOTE: The returned sal pc and end fields are not valid. */ |
| 185 | |
| 186 | struct symtab_and_line |
| 187 | set_current_source_symtab_and_line (const struct symtab_and_line *sal) |
| 188 | { |
| 189 | struct symtab_and_line cursal; |
| 190 | |
| 191 | cursal.symtab = current_source_symtab; |
| 192 | cursal.line = current_source_line; |
| 193 | |
| 194 | current_source_symtab = sal->symtab; |
| 195 | current_source_line = sal->line; |
| 196 | cursal.pc = 0; |
| 197 | cursal.end = 0; |
| 198 | |
| 199 | return cursal; |
| 200 | } |
| 201 | |
| 202 | /* Reset any information stored about a default file and line to print. */ |
| 203 | |
| 204 | void |
| 205 | clear_current_source_symtab_and_line (void) |
| 206 | { |
| 207 | current_source_symtab = 0; |
| 208 | current_source_line = 0; |
| 209 | } |
| 210 | |
| 211 | /* Set the source file default for the "list" command to be S. |
| 212 | |
| 213 | If S is NULL, and we don't have a default, find one. This |
| 214 | should only be called when the user actually tries to use the |
| 215 | default, since we produce an error if we can't find a reasonable |
| 216 | default. Also, since this can cause symbols to be read, doing it |
| 217 | before we need to would make things slower than necessary. */ |
| 218 | |
| 219 | void |
| 220 | select_source_symtab (struct symtab *s) |
| 221 | { |
| 222 | struct symtabs_and_lines sals; |
| 223 | struct symtab_and_line sal; |
| 224 | struct partial_symtab *ps; |
| 225 | struct partial_symtab *cs_pst = 0; |
| 226 | struct objfile *ofp; |
| 227 | |
| 228 | if (s) |
| 229 | { |
| 230 | current_source_symtab = s; |
| 231 | current_source_line = 1; |
| 232 | return; |
| 233 | } |
| 234 | |
| 235 | if (current_source_symtab) |
| 236 | return; |
| 237 | |
| 238 | /* Make the default place to list be the function `main' |
| 239 | if one exists. */ |
| 240 | if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0, NULL)) |
| 241 | { |
| 242 | sals = decode_line_spec (main_name (), 1); |
| 243 | sal = sals.sals[0]; |
| 244 | xfree (sals.sals); |
| 245 | current_source_symtab = sal.symtab; |
| 246 | current_source_line = max (sal.line - (lines_to_list - 1), 1); |
| 247 | if (current_source_symtab) |
| 248 | return; |
| 249 | } |
| 250 | |
| 251 | /* All right; find the last file in the symtab list (ignoring .h's). */ |
| 252 | |
| 253 | current_source_line = 1; |
| 254 | |
| 255 | for (ofp = object_files; ofp != NULL; ofp = ofp->next) |
| 256 | { |
| 257 | for (s = ofp->symtabs; s; s = s->next) |
| 258 | { |
| 259 | char *name = s->filename; |
| 260 | int len = strlen (name); |
| 261 | if (!(len > 2 && (DEPRECATED_STREQ (&name[len - 2], ".h")))) |
| 262 | { |
| 263 | current_source_symtab = s; |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | if (current_source_symtab) |
| 268 | return; |
| 269 | |
| 270 | /* Howabout the partial symbol tables? */ |
| 271 | |
| 272 | for (ofp = object_files; ofp != NULL; ofp = ofp->next) |
| 273 | { |
| 274 | for (ps = ofp->psymtabs; ps != NULL; ps = ps->next) |
| 275 | { |
| 276 | char *name = ps->filename; |
| 277 | int len = strlen (name); |
| 278 | if (!(len > 2 && (DEPRECATED_STREQ (&name[len - 2], ".h")))) |
| 279 | { |
| 280 | cs_pst = ps; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | if (cs_pst) |
| 285 | { |
| 286 | if (cs_pst->readin) |
| 287 | { |
| 288 | internal_error (__FILE__, __LINE__, |
| 289 | "select_source_symtab: " |
| 290 | "readin pst found and no symtabs."); |
| 291 | } |
| 292 | else |
| 293 | { |
| 294 | current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst); |
| 295 | } |
| 296 | } |
| 297 | if (current_source_symtab) |
| 298 | return; |
| 299 | |
| 300 | error ("Can't find a default source file"); |
| 301 | } |
| 302 | \f |
| 303 | static void |
| 304 | show_directories (char *ignore, int from_tty) |
| 305 | { |
| 306 | puts_filtered ("Source directories searched: "); |
| 307 | puts_filtered (source_path); |
| 308 | puts_filtered ("\n"); |
| 309 | } |
| 310 | |
| 311 | /* Forget what we learned about line positions in source files, and |
| 312 | which directories contain them; must check again now since files |
| 313 | may be found in a different directory now. */ |
| 314 | |
| 315 | void |
| 316 | forget_cached_source_info (void) |
| 317 | { |
| 318 | struct symtab *s; |
| 319 | struct objfile *objfile; |
| 320 | struct partial_symtab *pst; |
| 321 | |
| 322 | for (objfile = object_files; objfile != NULL; objfile = objfile->next) |
| 323 | { |
| 324 | for (s = objfile->symtabs; s != NULL; s = s->next) |
| 325 | { |
| 326 | if (s->line_charpos != NULL) |
| 327 | { |
| 328 | xmfree (objfile->md, s->line_charpos); |
| 329 | s->line_charpos = NULL; |
| 330 | } |
| 331 | if (s->fullname != NULL) |
| 332 | { |
| 333 | xmfree (objfile->md, s->fullname); |
| 334 | s->fullname = NULL; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | ALL_OBJFILE_PSYMTABS (objfile, pst) |
| 339 | { |
| 340 | if (pst->fullname != NULL) |
| 341 | { |
| 342 | xfree (pst->fullname); |
| 343 | pst->fullname = NULL; |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | void |
| 350 | init_source_path (void) |
| 351 | { |
| 352 | char buf[20]; |
| 353 | |
| 354 | sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR); |
| 355 | source_path = xstrdup (buf); |
| 356 | forget_cached_source_info (); |
| 357 | } |
| 358 | |
| 359 | void |
| 360 | init_last_source_visited (void) |
| 361 | { |
| 362 | last_source_visited = NULL; |
| 363 | } |
| 364 | |
| 365 | /* Add zero or more directories to the front of the source path. */ |
| 366 | |
| 367 | void |
| 368 | directory_command (char *dirname, int from_tty) |
| 369 | { |
| 370 | dont_repeat (); |
| 371 | /* FIXME, this goes to "delete dir"... */ |
| 372 | if (dirname == 0) |
| 373 | { |
| 374 | if (from_tty && query ("Reinitialize source path to empty? ")) |
| 375 | { |
| 376 | xfree (source_path); |
| 377 | init_source_path (); |
| 378 | } |
| 379 | } |
| 380 | else |
| 381 | { |
| 382 | mod_path (dirname, &source_path); |
| 383 | last_source_visited = NULL; |
| 384 | } |
| 385 | if (from_tty) |
| 386 | show_directories ((char *) 0, from_tty); |
| 387 | forget_cached_source_info (); |
| 388 | } |
| 389 | |
| 390 | /* Add zero or more directories to the front of an arbitrary path. */ |
| 391 | |
| 392 | void |
| 393 | mod_path (char *dirname, char **which_path) |
| 394 | { |
| 395 | add_path (dirname, which_path, 1); |
| 396 | } |
| 397 | |
| 398 | /* Workhorse of mod_path. Takes an extra argument to determine |
| 399 | if dirname should be parsed for separators that indicate multiple |
| 400 | directories. This allows for interfaces that pre-parse the dirname |
| 401 | and allow specification of traditional separator characters such |
| 402 | as space or tab. */ |
| 403 | |
| 404 | void |
| 405 | add_path (char *dirname, char **which_path, int parse_separators) |
| 406 | { |
| 407 | char *old = *which_path; |
| 408 | int prefix = 0; |
| 409 | |
| 410 | if (dirname == 0) |
| 411 | return; |
| 412 | |
| 413 | dirname = xstrdup (dirname); |
| 414 | make_cleanup (xfree, dirname); |
| 415 | |
| 416 | do |
| 417 | { |
| 418 | char *name = dirname; |
| 419 | char *p; |
| 420 | struct stat st; |
| 421 | |
| 422 | { |
| 423 | char *separator = NULL; |
| 424 | char *space = NULL; |
| 425 | char *tab = NULL; |
| 426 | |
| 427 | if (parse_separators) |
| 428 | { |
| 429 | separator = strchr (name, DIRNAME_SEPARATOR); |
| 430 | space = strchr (name, ' '); |
| 431 | tab = strchr (name, '\t'); |
| 432 | } |
| 433 | |
| 434 | if (separator == 0 && space == 0 && tab == 0) |
| 435 | p = dirname = name + strlen (name); |
| 436 | else |
| 437 | { |
| 438 | p = 0; |
| 439 | if (separator != 0 && (p == 0 || separator < p)) |
| 440 | p = separator; |
| 441 | if (space != 0 && (p == 0 || space < p)) |
| 442 | p = space; |
| 443 | if (tab != 0 && (p == 0 || tab < p)) |
| 444 | p = tab; |
| 445 | dirname = p + 1; |
| 446 | while (*dirname == DIRNAME_SEPARATOR |
| 447 | || *dirname == ' ' |
| 448 | || *dirname == '\t') |
| 449 | ++dirname; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | if (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */ |
| 454 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 455 | /* On MS-DOS and MS-Windows, h:\ is different from h: */ |
| 456 | && !(p == name + 3 && name[1] == ':') /* "d:/" */ |
| 457 | #endif |
| 458 | && IS_DIR_SEPARATOR (p[-1])) |
| 459 | /* Sigh. "foo/" => "foo" */ |
| 460 | --p; |
| 461 | *p = '\0'; |
| 462 | |
| 463 | while (p > name && p[-1] == '.') |
| 464 | { |
| 465 | if (p - name == 1) |
| 466 | { |
| 467 | /* "." => getwd (). */ |
| 468 | name = current_directory; |
| 469 | goto append; |
| 470 | } |
| 471 | else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2])) |
| 472 | { |
| 473 | if (p - name == 2) |
| 474 | { |
| 475 | /* "/." => "/". */ |
| 476 | *--p = '\0'; |
| 477 | goto append; |
| 478 | } |
| 479 | else |
| 480 | { |
| 481 | /* "...foo/." => "...foo". */ |
| 482 | p -= 2; |
| 483 | *p = '\0'; |
| 484 | continue; |
| 485 | } |
| 486 | } |
| 487 | else |
| 488 | break; |
| 489 | } |
| 490 | |
| 491 | if (name[0] == '~') |
| 492 | name = tilde_expand (name); |
| 493 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 494 | else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */ |
| 495 | name = concat (name, ".", NULL); |
| 496 | #endif |
| 497 | else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$') |
| 498 | name = concat (current_directory, SLASH_STRING, name, NULL); |
| 499 | else |
| 500 | name = savestring (name, p - name); |
| 501 | make_cleanup (xfree, name); |
| 502 | |
| 503 | /* Unless it's a variable, check existence. */ |
| 504 | if (name[0] != '$') |
| 505 | { |
| 506 | /* These are warnings, not errors, since we don't want a |
| 507 | non-existent directory in a .gdbinit file to stop processing |
| 508 | of the .gdbinit file. |
| 509 | |
| 510 | Whether they get added to the path is more debatable. Current |
| 511 | answer is yes, in case the user wants to go make the directory |
| 512 | or whatever. If the directory continues to not exist/not be |
| 513 | a directory/etc, then having them in the path should be |
| 514 | harmless. */ |
| 515 | if (stat (name, &st) < 0) |
| 516 | { |
| 517 | int save_errno = errno; |
| 518 | fprintf_unfiltered (gdb_stderr, "Warning: "); |
| 519 | print_sys_errmsg (name, save_errno); |
| 520 | } |
| 521 | else if ((st.st_mode & S_IFMT) != S_IFDIR) |
| 522 | warning ("%s is not a directory.", name); |
| 523 | } |
| 524 | |
| 525 | append: |
| 526 | { |
| 527 | unsigned int len = strlen (name); |
| 528 | |
| 529 | p = *which_path; |
| 530 | while (1) |
| 531 | { |
| 532 | /* FIXME: strncmp loses in interesting ways on MS-DOS and |
| 533 | MS-Windows because of case-insensitivity and two different |
| 534 | but functionally identical slash characters. We need a |
| 535 | special filesystem-dependent file-name comparison function. |
| 536 | |
| 537 | Actually, even on Unix I would use realpath() or its work- |
| 538 | alike before comparing. Then all the code above which |
| 539 | removes excess slashes and dots could simply go away. */ |
| 540 | if (!strncmp (p, name, len) |
| 541 | && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR)) |
| 542 | { |
| 543 | /* Found it in the search path, remove old copy */ |
| 544 | if (p > *which_path) |
| 545 | p--; /* Back over leading separator */ |
| 546 | if (prefix > p - *which_path) |
| 547 | goto skip_dup; /* Same dir twice in one cmd */ |
| 548 | strcpy (p, &p[len + 1]); /* Copy from next \0 or : */ |
| 549 | } |
| 550 | p = strchr (p, DIRNAME_SEPARATOR); |
| 551 | if (p != 0) |
| 552 | ++p; |
| 553 | else |
| 554 | break; |
| 555 | } |
| 556 | if (p == 0) |
| 557 | { |
| 558 | char tinybuf[2]; |
| 559 | |
| 560 | tinybuf[0] = DIRNAME_SEPARATOR; |
| 561 | tinybuf[1] = '\0'; |
| 562 | |
| 563 | /* If we have already tacked on a name(s) in this command, be sure they stay |
| 564 | on the front as we tack on some more. */ |
| 565 | if (prefix) |
| 566 | { |
| 567 | char *temp, c; |
| 568 | |
| 569 | c = old[prefix]; |
| 570 | old[prefix] = '\0'; |
| 571 | temp = concat (old, tinybuf, name, NULL); |
| 572 | old[prefix] = c; |
| 573 | *which_path = concat (temp, "", &old[prefix], NULL); |
| 574 | prefix = strlen (temp); |
| 575 | xfree (temp); |
| 576 | } |
| 577 | else |
| 578 | { |
| 579 | *which_path = concat (name, (old[0] ? tinybuf : old), old, NULL); |
| 580 | prefix = strlen (name); |
| 581 | } |
| 582 | xfree (old); |
| 583 | old = *which_path; |
| 584 | } |
| 585 | } |
| 586 | skip_dup:; |
| 587 | } |
| 588 | while (*dirname != '\0'); |
| 589 | } |
| 590 | |
| 591 | |
| 592 | static void |
| 593 | source_info (char *ignore, int from_tty) |
| 594 | { |
| 595 | struct symtab *s = current_source_symtab; |
| 596 | |
| 597 | if (!s) |
| 598 | { |
| 599 | printf_filtered ("No current source file.\n"); |
| 600 | return; |
| 601 | } |
| 602 | printf_filtered ("Current source file is %s\n", s->filename); |
| 603 | if (s->dirname) |
| 604 | printf_filtered ("Compilation directory is %s\n", s->dirname); |
| 605 | if (s->fullname) |
| 606 | printf_filtered ("Located in %s\n", s->fullname); |
| 607 | if (s->nlines) |
| 608 | printf_filtered ("Contains %d line%s.\n", s->nlines, |
| 609 | s->nlines == 1 ? "" : "s"); |
| 610 | |
| 611 | printf_filtered ("Source language is %s.\n", language_str (s->language)); |
| 612 | printf_filtered ("Compiled with %s debugging format.\n", s->debugformat); |
| 613 | printf_filtered ("%s preprocessor macro info.\n", |
| 614 | s->macro_table ? "Includes" : "Does not include"); |
| 615 | } |
| 616 | \f |
| 617 | |
| 618 | /* Return True if the file NAME exists and is a regular file */ |
| 619 | static int |
| 620 | is_regular_file (const char *name) |
| 621 | { |
| 622 | struct stat st; |
| 623 | const int status = stat (name, &st); |
| 624 | |
| 625 | /* Stat should never fail except when the file does not exist. |
| 626 | If stat fails, analyze the source of error and return True |
| 627 | unless the file does not exist, to avoid returning false results |
| 628 | on obscure systems where stat does not work as expected. |
| 629 | */ |
| 630 | if (status != 0) |
| 631 | return (errno != ENOENT); |
| 632 | |
| 633 | return S_ISREG (st.st_mode); |
| 634 | } |
| 635 | |
| 636 | /* Open a file named STRING, searching path PATH (dir names sep by some char) |
| 637 | using mode MODE and protection bits PROT in the calls to open. |
| 638 | |
| 639 | If TRY_CWD_FIRST, try to open ./STRING before searching PATH. |
| 640 | (ie pretend the first element of PATH is "."). This also indicates |
| 641 | that a slash in STRING disables searching of the path (this is |
| 642 | so that "exec-file ./foo" or "symbol-file ./foo" insures that you |
| 643 | get that particular version of foo or an error message). |
| 644 | |
| 645 | If FILENAME_OPENED is non-null, set it to a newly allocated string naming |
| 646 | the actual file opened (this string will always start with a "/"). We |
| 647 | have to take special pains to avoid doubling the "/" between the directory |
| 648 | and the file, sigh! Emacs gets confuzzed by this when we print the |
| 649 | source file name!!! |
| 650 | |
| 651 | If a file is found, return the descriptor. |
| 652 | Otherwise, return -1, with errno set for the last name we tried to open. */ |
| 653 | |
| 654 | /* >>>> This should only allow files of certain types, |
| 655 | >>>> eg executable, non-directory */ |
| 656 | int |
| 657 | openp (const char *path, int try_cwd_first, const char *string, |
| 658 | int mode, int prot, |
| 659 | char **filename_opened) |
| 660 | { |
| 661 | int fd; |
| 662 | char *filename; |
| 663 | const char *p; |
| 664 | const char *p1; |
| 665 | int len; |
| 666 | int alloclen; |
| 667 | |
| 668 | if (!path) |
| 669 | path = "."; |
| 670 | |
| 671 | #if defined(_WIN32) || defined(__CYGWIN__) |
| 672 | mode |= O_BINARY; |
| 673 | #endif |
| 674 | |
| 675 | if (try_cwd_first || IS_ABSOLUTE_PATH (string)) |
| 676 | { |
| 677 | int i; |
| 678 | |
| 679 | if (is_regular_file (string)) |
| 680 | { |
| 681 | filename = alloca (strlen (string) + 1); |
| 682 | strcpy (filename, string); |
| 683 | fd = open (filename, mode, prot); |
| 684 | if (fd >= 0) |
| 685 | goto done; |
| 686 | } |
| 687 | else |
| 688 | { |
| 689 | filename = NULL; |
| 690 | fd = -1; |
| 691 | } |
| 692 | |
| 693 | for (i = 0; string[i]; i++) |
| 694 | if (IS_DIR_SEPARATOR (string[i])) |
| 695 | goto done; |
| 696 | } |
| 697 | |
| 698 | /* ./foo => foo */ |
| 699 | while (string[0] == '.' && IS_DIR_SEPARATOR (string[1])) |
| 700 | string += 2; |
| 701 | |
| 702 | alloclen = strlen (path) + strlen (string) + 2; |
| 703 | filename = alloca (alloclen); |
| 704 | fd = -1; |
| 705 | for (p = path; p; p = p1 ? p1 + 1 : 0) |
| 706 | { |
| 707 | p1 = strchr (p, DIRNAME_SEPARATOR); |
| 708 | if (p1) |
| 709 | len = p1 - p; |
| 710 | else |
| 711 | len = strlen (p); |
| 712 | |
| 713 | if (len == 4 && p[0] == '$' && p[1] == 'c' |
| 714 | && p[2] == 'w' && p[3] == 'd') |
| 715 | { |
| 716 | /* Name is $cwd -- insert current directory name instead. */ |
| 717 | int newlen; |
| 718 | |
| 719 | /* First, realloc the filename buffer if too short. */ |
| 720 | len = strlen (current_directory); |
| 721 | newlen = len + strlen (string) + 2; |
| 722 | if (newlen > alloclen) |
| 723 | { |
| 724 | alloclen = newlen; |
| 725 | filename = alloca (alloclen); |
| 726 | } |
| 727 | strcpy (filename, current_directory); |
| 728 | } |
| 729 | else |
| 730 | { |
| 731 | /* Normal file name in path -- just use it. */ |
| 732 | strncpy (filename, p, len); |
| 733 | filename[len] = 0; |
| 734 | } |
| 735 | |
| 736 | /* Remove trailing slashes */ |
| 737 | while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1])) |
| 738 | filename[--len] = 0; |
| 739 | |
| 740 | strcat (filename + len, SLASH_STRING); |
| 741 | strcat (filename, string); |
| 742 | |
| 743 | if (is_regular_file (filename)) |
| 744 | { |
| 745 | fd = open (filename, mode); |
| 746 | if (fd >= 0) |
| 747 | break; |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | done: |
| 752 | if (filename_opened) |
| 753 | { |
| 754 | /* If a file was opened, canonicalize its filename. Use xfullpath |
| 755 | rather than gdb_realpath to avoid resolving the basename part |
| 756 | of filenames when the associated file is a symbolic link. This |
| 757 | fixes a potential inconsistency between the filenames known to |
| 758 | GDB and the filenames it prints in the annotations. */ |
| 759 | if (fd < 0) |
| 760 | *filename_opened = NULL; |
| 761 | else if (IS_ABSOLUTE_PATH (filename)) |
| 762 | *filename_opened = xfullpath (filename); |
| 763 | else |
| 764 | { |
| 765 | /* Beware the // my son, the Emacs barfs, the botch that catch... */ |
| 766 | |
| 767 | char *f = concat (current_directory, |
| 768 | IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1]) |
| 769 | ? "" : SLASH_STRING, |
| 770 | filename, NULL); |
| 771 | *filename_opened = xfullpath (f); |
| 772 | xfree (f); |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | return fd; |
| 777 | } |
| 778 | |
| 779 | |
| 780 | /* This is essentially a convenience, for clients that want the behaviour |
| 781 | of openp, using source_path, but that really don't want the file to be |
| 782 | opened but want instead just to know what the full pathname is (as |
| 783 | qualified against source_path). |
| 784 | |
| 785 | The current working directory is searched first. |
| 786 | |
| 787 | If the file was found, this function returns 1, and FULL_PATHNAME is |
| 788 | set to the fully-qualified pathname. |
| 789 | |
| 790 | Else, this functions returns 0, and FULL_PATHNAME is set to NULL. |
| 791 | */ |
| 792 | int |
| 793 | source_full_path_of (char *filename, char **full_pathname) |
| 794 | { |
| 795 | int fd; |
| 796 | |
| 797 | fd = openp (source_path, 1, filename, O_RDONLY, 0, full_pathname); |
| 798 | if (fd < 0) |
| 799 | { |
| 800 | *full_pathname = NULL; |
| 801 | return 0; |
| 802 | } |
| 803 | |
| 804 | close (fd); |
| 805 | return 1; |
| 806 | } |
| 807 | |
| 808 | |
| 809 | /* Open a source file given a symtab S. Returns a file descriptor or |
| 810 | negative number for error. */ |
| 811 | |
| 812 | int |
| 813 | open_source_file (struct symtab *s) |
| 814 | { |
| 815 | char *path = source_path; |
| 816 | const char *p; |
| 817 | int result; |
| 818 | char *fullname; |
| 819 | |
| 820 | /* Quick way out if we already know its full name */ |
| 821 | if (s->fullname) |
| 822 | { |
| 823 | result = open (s->fullname, OPEN_MODE); |
| 824 | if (result >= 0) |
| 825 | return result; |
| 826 | /* Didn't work -- free old one, try again. */ |
| 827 | xmfree (s->objfile->md, s->fullname); |
| 828 | s->fullname = NULL; |
| 829 | } |
| 830 | |
| 831 | if (s->dirname != NULL) |
| 832 | { |
| 833 | /* Replace a path entry of $cdir with the compilation directory name */ |
| 834 | #define cdir_len 5 |
| 835 | /* We cast strstr's result in case an ANSIhole has made it const, |
| 836 | which produces a "required warning" when assigned to a nonconst. */ |
| 837 | p = (char *) strstr (source_path, "$cdir"); |
| 838 | if (p && (p == path || p[-1] == DIRNAME_SEPARATOR) |
| 839 | && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0')) |
| 840 | { |
| 841 | int len; |
| 842 | |
| 843 | path = (char *) |
| 844 | alloca (strlen (source_path) + 1 + strlen (s->dirname) + 1); |
| 845 | len = p - source_path; |
| 846 | strncpy (path, source_path, len); /* Before $cdir */ |
| 847 | strcpy (path + len, s->dirname); /* new stuff */ |
| 848 | strcat (path + len, source_path + len + cdir_len); /* After $cdir */ |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | result = openp (path, 0, s->filename, OPEN_MODE, 0, &s->fullname); |
| 853 | if (result < 0) |
| 854 | { |
| 855 | /* Didn't work. Try using just the basename. */ |
| 856 | p = lbasename (s->filename); |
| 857 | if (p != s->filename) |
| 858 | result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname); |
| 859 | } |
| 860 | |
| 861 | if (result >= 0) |
| 862 | { |
| 863 | fullname = s->fullname; |
| 864 | s->fullname = mstrsave (s->objfile->md, s->fullname); |
| 865 | xfree (fullname); |
| 866 | } |
| 867 | return result; |
| 868 | } |
| 869 | |
| 870 | /* Return the path to the source file associated with symtab. Returns NULL |
| 871 | if no symtab. */ |
| 872 | |
| 873 | char * |
| 874 | symtab_to_filename (struct symtab *s) |
| 875 | { |
| 876 | int fd; |
| 877 | |
| 878 | if (!s) |
| 879 | return NULL; |
| 880 | |
| 881 | /* If we've seen the file before, just return fullname. */ |
| 882 | |
| 883 | if (s->fullname) |
| 884 | return s->fullname; |
| 885 | |
| 886 | /* Try opening the file to setup fullname */ |
| 887 | |
| 888 | fd = open_source_file (s); |
| 889 | if (fd < 0) |
| 890 | return s->filename; /* File not found. Just use short name */ |
| 891 | |
| 892 | /* Found the file. Cleanup and return the full name */ |
| 893 | |
| 894 | close (fd); |
| 895 | return s->fullname; |
| 896 | } |
| 897 | \f |
| 898 | |
| 899 | /* Create and initialize the table S->line_charpos that records |
| 900 | the positions of the lines in the source file, which is assumed |
| 901 | to be open on descriptor DESC. |
| 902 | All set S->nlines to the number of such lines. */ |
| 903 | |
| 904 | void |
| 905 | find_source_lines (struct symtab *s, int desc) |
| 906 | { |
| 907 | struct stat st; |
| 908 | char *data, *p, *end; |
| 909 | int nlines = 0; |
| 910 | int lines_allocated = 1000; |
| 911 | int *line_charpos; |
| 912 | long mtime = 0; |
| 913 | int size; |
| 914 | |
| 915 | line_charpos = (int *) xmmalloc (s->objfile->md, |
| 916 | lines_allocated * sizeof (int)); |
| 917 | if (fstat (desc, &st) < 0) |
| 918 | perror_with_name (s->filename); |
| 919 | |
| 920 | if (s && s->objfile && s->objfile->obfd) |
| 921 | mtime = bfd_get_mtime (s->objfile->obfd); |
| 922 | else if (exec_bfd) |
| 923 | mtime = bfd_get_mtime (exec_bfd); |
| 924 | |
| 925 | if (mtime && mtime < st.st_mtime) |
| 926 | { |
| 927 | warning ("Source file is more recent than executable.\n"); |
| 928 | } |
| 929 | |
| 930 | #ifdef LSEEK_NOT_LINEAR |
| 931 | { |
| 932 | char c; |
| 933 | |
| 934 | /* Have to read it byte by byte to find out where the chars live */ |
| 935 | |
| 936 | line_charpos[0] = lseek (desc, 0, SEEK_CUR); |
| 937 | nlines = 1; |
| 938 | while (myread (desc, &c, 1) > 0) |
| 939 | { |
| 940 | if (c == '\n') |
| 941 | { |
| 942 | if (nlines == lines_allocated) |
| 943 | { |
| 944 | lines_allocated *= 2; |
| 945 | line_charpos = |
| 946 | (int *) xmrealloc (s->objfile->md, (char *) line_charpos, |
| 947 | sizeof (int) * lines_allocated); |
| 948 | } |
| 949 | line_charpos[nlines++] = lseek (desc, 0, SEEK_CUR); |
| 950 | } |
| 951 | } |
| 952 | } |
| 953 | #else /* lseek linear. */ |
| 954 | { |
| 955 | struct cleanup *old_cleanups; |
| 956 | |
| 957 | /* st_size might be a large type, but we only support source files whose |
| 958 | size fits in an int. */ |
| 959 | size = (int) st.st_size; |
| 960 | |
| 961 | /* Use malloc, not alloca, because this may be pretty large, and we may |
| 962 | run into various kinds of limits on stack size. */ |
| 963 | data = (char *) xmalloc (size); |
| 964 | old_cleanups = make_cleanup (xfree, data); |
| 965 | |
| 966 | /* Reassign `size' to result of read for systems where \r\n -> \n. */ |
| 967 | size = myread (desc, data, size); |
| 968 | if (size < 0) |
| 969 | perror_with_name (s->filename); |
| 970 | end = data + size; |
| 971 | p = data; |
| 972 | line_charpos[0] = 0; |
| 973 | nlines = 1; |
| 974 | while (p != end) |
| 975 | { |
| 976 | if (*p++ == '\n' |
| 977 | /* A newline at the end does not start a new line. */ |
| 978 | && p != end) |
| 979 | { |
| 980 | if (nlines == lines_allocated) |
| 981 | { |
| 982 | lines_allocated *= 2; |
| 983 | line_charpos = |
| 984 | (int *) xmrealloc (s->objfile->md, (char *) line_charpos, |
| 985 | sizeof (int) * lines_allocated); |
| 986 | } |
| 987 | line_charpos[nlines++] = p - data; |
| 988 | } |
| 989 | } |
| 990 | do_cleanups (old_cleanups); |
| 991 | } |
| 992 | #endif /* lseek linear. */ |
| 993 | s->nlines = nlines; |
| 994 | s->line_charpos = |
| 995 | (int *) xmrealloc (s->objfile->md, (char *) line_charpos, |
| 996 | nlines * sizeof (int)); |
| 997 | |
| 998 | } |
| 999 | |
| 1000 | /* Return the character position of a line LINE in symtab S. |
| 1001 | Return 0 if anything is invalid. */ |
| 1002 | |
| 1003 | #if 0 /* Currently unused */ |
| 1004 | |
| 1005 | int |
| 1006 | source_line_charpos (struct symtab *s, int line) |
| 1007 | { |
| 1008 | if (!s) |
| 1009 | return 0; |
| 1010 | if (!s->line_charpos || line <= 0) |
| 1011 | return 0; |
| 1012 | if (line > s->nlines) |
| 1013 | line = s->nlines; |
| 1014 | return s->line_charpos[line - 1]; |
| 1015 | } |
| 1016 | |
| 1017 | /* Return the line number of character position POS in symtab S. */ |
| 1018 | |
| 1019 | int |
| 1020 | source_charpos_line (struct symtab *s, int chr) |
| 1021 | { |
| 1022 | int line = 0; |
| 1023 | int *lnp; |
| 1024 | |
| 1025 | if (s == 0 || s->line_charpos == 0) |
| 1026 | return 0; |
| 1027 | lnp = s->line_charpos; |
| 1028 | /* Files are usually short, so sequential search is Ok */ |
| 1029 | while (line < s->nlines && *lnp <= chr) |
| 1030 | { |
| 1031 | line++; |
| 1032 | lnp++; |
| 1033 | } |
| 1034 | if (line >= s->nlines) |
| 1035 | line = s->nlines; |
| 1036 | return line; |
| 1037 | } |
| 1038 | |
| 1039 | #endif /* 0 */ |
| 1040 | \f |
| 1041 | |
| 1042 | /* Get full pathname and line number positions for a symtab. |
| 1043 | Return nonzero if line numbers may have changed. |
| 1044 | Set *FULLNAME to actual name of the file as found by `openp', |
| 1045 | or to 0 if the file is not found. */ |
| 1046 | |
| 1047 | static int |
| 1048 | get_filename_and_charpos (struct symtab *s, char **fullname) |
| 1049 | { |
| 1050 | int desc, linenums_changed = 0; |
| 1051 | |
| 1052 | desc = open_source_file (s); |
| 1053 | if (desc < 0) |
| 1054 | { |
| 1055 | if (fullname) |
| 1056 | *fullname = NULL; |
| 1057 | return 0; |
| 1058 | } |
| 1059 | if (fullname) |
| 1060 | *fullname = s->fullname; |
| 1061 | if (s->line_charpos == 0) |
| 1062 | linenums_changed = 1; |
| 1063 | if (linenums_changed) |
| 1064 | find_source_lines (s, desc); |
| 1065 | close (desc); |
| 1066 | return linenums_changed; |
| 1067 | } |
| 1068 | |
| 1069 | /* Print text describing the full name of the source file S |
| 1070 | and the line number LINE and its corresponding character position. |
| 1071 | The text starts with two Ctrl-z so that the Emacs-GDB interface |
| 1072 | can easily find it. |
| 1073 | |
| 1074 | MID_STATEMENT is nonzero if the PC is not at the beginning of that line. |
| 1075 | |
| 1076 | Return 1 if successful, 0 if could not find the file. */ |
| 1077 | |
| 1078 | int |
| 1079 | identify_source_line (struct symtab *s, int line, int mid_statement, |
| 1080 | CORE_ADDR pc) |
| 1081 | { |
| 1082 | if (s->line_charpos == 0) |
| 1083 | get_filename_and_charpos (s, (char **) NULL); |
| 1084 | if (s->fullname == 0) |
| 1085 | return 0; |
| 1086 | if (line > s->nlines) |
| 1087 | /* Don't index off the end of the line_charpos array. */ |
| 1088 | return 0; |
| 1089 | annotate_source (s->fullname, line, s->line_charpos[line - 1], |
| 1090 | mid_statement, pc); |
| 1091 | |
| 1092 | current_source_line = line; |
| 1093 | first_line_listed = line; |
| 1094 | last_line_listed = line; |
| 1095 | current_source_symtab = s; |
| 1096 | return 1; |
| 1097 | } |
| 1098 | \f |
| 1099 | |
| 1100 | /* Print source lines from the file of symtab S, |
| 1101 | starting with line number LINE and stopping before line number STOPLINE. */ |
| 1102 | |
| 1103 | static void print_source_lines_base (struct symtab *s, int line, int stopline, |
| 1104 | int noerror); |
| 1105 | static void |
| 1106 | print_source_lines_base (struct symtab *s, int line, int stopline, int noerror) |
| 1107 | { |
| 1108 | int c; |
| 1109 | int desc; |
| 1110 | FILE *stream; |
| 1111 | int nlines = stopline - line; |
| 1112 | |
| 1113 | /* Regardless of whether we can open the file, set current_source_symtab. */ |
| 1114 | current_source_symtab = s; |
| 1115 | current_source_line = line; |
| 1116 | first_line_listed = line; |
| 1117 | |
| 1118 | /* If printing of source lines is disabled, just print file and line number */ |
| 1119 | if (ui_out_test_flags (uiout, ui_source_list)) |
| 1120 | { |
| 1121 | /* Only prints "No such file or directory" once */ |
| 1122 | if ((s != last_source_visited) || (!last_source_error)) |
| 1123 | { |
| 1124 | last_source_visited = s; |
| 1125 | desc = open_source_file (s); |
| 1126 | } |
| 1127 | else |
| 1128 | { |
| 1129 | desc = last_source_error; |
| 1130 | noerror = 1; |
| 1131 | } |
| 1132 | } |
| 1133 | else |
| 1134 | { |
| 1135 | desc = -1; |
| 1136 | noerror = 1; |
| 1137 | } |
| 1138 | |
| 1139 | if (desc < 0) |
| 1140 | { |
| 1141 | last_source_error = desc; |
| 1142 | |
| 1143 | if (!noerror) |
| 1144 | { |
| 1145 | char *name = alloca (strlen (s->filename) + 100); |
| 1146 | sprintf (name, "%d\t%s", line, s->filename); |
| 1147 | print_sys_errmsg (name, errno); |
| 1148 | } |
| 1149 | else |
| 1150 | ui_out_field_int (uiout, "line", line); |
| 1151 | ui_out_text (uiout, "\tin "); |
| 1152 | ui_out_field_string (uiout, "file", s->filename); |
| 1153 | ui_out_text (uiout, "\n"); |
| 1154 | |
| 1155 | return; |
| 1156 | } |
| 1157 | |
| 1158 | last_source_error = 0; |
| 1159 | |
| 1160 | if (s->line_charpos == 0) |
| 1161 | find_source_lines (s, desc); |
| 1162 | |
| 1163 | if (line < 1 || line > s->nlines) |
| 1164 | { |
| 1165 | close (desc); |
| 1166 | error ("Line number %d out of range; %s has %d lines.", |
| 1167 | line, s->filename, s->nlines); |
| 1168 | } |
| 1169 | |
| 1170 | if (lseek (desc, s->line_charpos[line - 1], 0) < 0) |
| 1171 | { |
| 1172 | close (desc); |
| 1173 | perror_with_name (s->filename); |
| 1174 | } |
| 1175 | |
| 1176 | stream = fdopen (desc, FDOPEN_MODE); |
| 1177 | clearerr (stream); |
| 1178 | |
| 1179 | while (nlines-- > 0) |
| 1180 | { |
| 1181 | char buf[20]; |
| 1182 | |
| 1183 | c = fgetc (stream); |
| 1184 | if (c == EOF) |
| 1185 | break; |
| 1186 | last_line_listed = current_source_line; |
| 1187 | sprintf (buf, "%d\t", current_source_line++); |
| 1188 | ui_out_text (uiout, buf); |
| 1189 | do |
| 1190 | { |
| 1191 | if (c < 040 && c != '\t' && c != '\n' && c != '\r') |
| 1192 | { |
| 1193 | sprintf (buf, "^%c", c + 0100); |
| 1194 | ui_out_text (uiout, buf); |
| 1195 | } |
| 1196 | else if (c == 0177) |
| 1197 | ui_out_text (uiout, "^?"); |
| 1198 | #ifdef CRLF_SOURCE_FILES |
| 1199 | else if (c == '\r') |
| 1200 | { |
| 1201 | /* Skip a \r character, but only before a \n. */ |
| 1202 | int c1 = fgetc (stream); |
| 1203 | |
| 1204 | if (c1 != '\n') |
| 1205 | printf_filtered ("^%c", c + 0100); |
| 1206 | if (c1 != EOF) |
| 1207 | ungetc (c1, stream); |
| 1208 | } |
| 1209 | #endif |
| 1210 | else |
| 1211 | { |
| 1212 | sprintf (buf, "%c", c); |
| 1213 | ui_out_text (uiout, buf); |
| 1214 | } |
| 1215 | } |
| 1216 | while (c != '\n' && (c = fgetc (stream)) >= 0); |
| 1217 | } |
| 1218 | |
| 1219 | fclose (stream); |
| 1220 | } |
| 1221 | \f |
| 1222 | /* Show source lines from the file of symtab S, starting with line |
| 1223 | number LINE and stopping before line number STOPLINE. If this is the |
| 1224 | not the command line version, then the source is shown in the source |
| 1225 | window otherwise it is simply printed */ |
| 1226 | |
| 1227 | void |
| 1228 | print_source_lines (struct symtab *s, int line, int stopline, int noerror) |
| 1229 | { |
| 1230 | print_source_lines_base (s, line, stopline, noerror); |
| 1231 | } |
| 1232 | \f |
| 1233 | /* Print info on range of pc's in a specified line. */ |
| 1234 | |
| 1235 | static void |
| 1236 | line_info (char *arg, int from_tty) |
| 1237 | { |
| 1238 | struct symtabs_and_lines sals; |
| 1239 | struct symtab_and_line sal; |
| 1240 | CORE_ADDR start_pc, end_pc; |
| 1241 | int i; |
| 1242 | |
| 1243 | init_sal (&sal); /* initialize to zeroes */ |
| 1244 | |
| 1245 | if (arg == 0) |
| 1246 | { |
| 1247 | sal.symtab = current_source_symtab; |
| 1248 | sal.line = last_line_listed; |
| 1249 | sals.nelts = 1; |
| 1250 | sals.sals = (struct symtab_and_line *) |
| 1251 | xmalloc (sizeof (struct symtab_and_line)); |
| 1252 | sals.sals[0] = sal; |
| 1253 | } |
| 1254 | else |
| 1255 | { |
| 1256 | sals = decode_line_spec_1 (arg, 0); |
| 1257 | |
| 1258 | dont_repeat (); |
| 1259 | } |
| 1260 | |
| 1261 | /* C++ More than one line may have been specified, as when the user |
| 1262 | specifies an overloaded function name. Print info on them all. */ |
| 1263 | for (i = 0; i < sals.nelts; i++) |
| 1264 | { |
| 1265 | sal = sals.sals[i]; |
| 1266 | |
| 1267 | if (sal.symtab == 0) |
| 1268 | { |
| 1269 | printf_filtered ("No line number information available"); |
| 1270 | if (sal.pc != 0) |
| 1271 | { |
| 1272 | /* This is useful for "info line *0x7f34". If we can't tell the |
| 1273 | user about a source line, at least let them have the symbolic |
| 1274 | address. */ |
| 1275 | printf_filtered (" for address "); |
| 1276 | wrap_here (" "); |
| 1277 | print_address (sal.pc, gdb_stdout); |
| 1278 | } |
| 1279 | else |
| 1280 | printf_filtered ("."); |
| 1281 | printf_filtered ("\n"); |
| 1282 | } |
| 1283 | else if (sal.line > 0 |
| 1284 | && find_line_pc_range (sal, &start_pc, &end_pc)) |
| 1285 | { |
| 1286 | if (start_pc == end_pc) |
| 1287 | { |
| 1288 | printf_filtered ("Line %d of \"%s\"", |
| 1289 | sal.line, sal.symtab->filename); |
| 1290 | wrap_here (" "); |
| 1291 | printf_filtered (" is at address "); |
| 1292 | print_address (start_pc, gdb_stdout); |
| 1293 | wrap_here (" "); |
| 1294 | printf_filtered (" but contains no code.\n"); |
| 1295 | } |
| 1296 | else |
| 1297 | { |
| 1298 | printf_filtered ("Line %d of \"%s\"", |
| 1299 | sal.line, sal.symtab->filename); |
| 1300 | wrap_here (" "); |
| 1301 | printf_filtered (" starts at address "); |
| 1302 | print_address (start_pc, gdb_stdout); |
| 1303 | wrap_here (" "); |
| 1304 | printf_filtered (" and ends at "); |
| 1305 | print_address (end_pc, gdb_stdout); |
| 1306 | printf_filtered (".\n"); |
| 1307 | } |
| 1308 | |
| 1309 | /* x/i should display this line's code. */ |
| 1310 | set_next_address (start_pc); |
| 1311 | |
| 1312 | /* Repeating "info line" should do the following line. */ |
| 1313 | last_line_listed = sal.line + 1; |
| 1314 | |
| 1315 | /* If this is the only line, show the source code. If it could |
| 1316 | not find the file, don't do anything special. */ |
| 1317 | if (annotation_level && sals.nelts == 1) |
| 1318 | identify_source_line (sal.symtab, sal.line, 0, start_pc); |
| 1319 | } |
| 1320 | else |
| 1321 | /* Is there any case in which we get here, and have an address |
| 1322 | which the user would want to see? If we have debugging symbols |
| 1323 | and no line numbers? */ |
| 1324 | printf_filtered ("Line number %d is out of range for \"%s\".\n", |
| 1325 | sal.line, sal.symtab->filename); |
| 1326 | } |
| 1327 | xfree (sals.sals); |
| 1328 | } |
| 1329 | \f |
| 1330 | /* Commands to search the source file for a regexp. */ |
| 1331 | |
| 1332 | static void |
| 1333 | forward_search_command (char *regex, int from_tty) |
| 1334 | { |
| 1335 | int c; |
| 1336 | int desc; |
| 1337 | FILE *stream; |
| 1338 | int line; |
| 1339 | char *msg; |
| 1340 | |
| 1341 | line = last_line_listed + 1; |
| 1342 | |
| 1343 | msg = (char *) re_comp (regex); |
| 1344 | if (msg) |
| 1345 | error ("%s", msg); |
| 1346 | |
| 1347 | if (current_source_symtab == 0) |
| 1348 | select_source_symtab (0); |
| 1349 | |
| 1350 | desc = open_source_file (current_source_symtab); |
| 1351 | if (desc < 0) |
| 1352 | perror_with_name (current_source_symtab->filename); |
| 1353 | |
| 1354 | if (current_source_symtab->line_charpos == 0) |
| 1355 | find_source_lines (current_source_symtab, desc); |
| 1356 | |
| 1357 | if (line < 1 || line > current_source_symtab->nlines) |
| 1358 | { |
| 1359 | close (desc); |
| 1360 | error ("Expression not found"); |
| 1361 | } |
| 1362 | |
| 1363 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1364 | { |
| 1365 | close (desc); |
| 1366 | perror_with_name (current_source_symtab->filename); |
| 1367 | } |
| 1368 | |
| 1369 | stream = fdopen (desc, FDOPEN_MODE); |
| 1370 | clearerr (stream); |
| 1371 | while (1) |
| 1372 | { |
| 1373 | static char *buf = NULL; |
| 1374 | char *p; |
| 1375 | int cursize, newsize; |
| 1376 | |
| 1377 | cursize = 256; |
| 1378 | buf = xmalloc (cursize); |
| 1379 | p = buf; |
| 1380 | |
| 1381 | c = getc (stream); |
| 1382 | if (c == EOF) |
| 1383 | break; |
| 1384 | do |
| 1385 | { |
| 1386 | *p++ = c; |
| 1387 | if (p - buf == cursize) |
| 1388 | { |
| 1389 | newsize = cursize + cursize / 2; |
| 1390 | buf = xrealloc (buf, newsize); |
| 1391 | p = buf + cursize; |
| 1392 | cursize = newsize; |
| 1393 | } |
| 1394 | } |
| 1395 | while (c != '\n' && (c = getc (stream)) >= 0); |
| 1396 | |
| 1397 | #ifdef CRLF_SOURCE_FILES |
| 1398 | /* Remove the \r, if any, at the end of the line, otherwise |
| 1399 | regular expressions that end with $ or \n won't work. */ |
| 1400 | if (p - buf > 1 && p[-2] == '\r') |
| 1401 | { |
| 1402 | p--; |
| 1403 | p[-1] = '\n'; |
| 1404 | } |
| 1405 | #endif |
| 1406 | |
| 1407 | /* we now have a source line in buf, null terminate and match */ |
| 1408 | *p = 0; |
| 1409 | if (re_exec (buf) > 0) |
| 1410 | { |
| 1411 | /* Match! */ |
| 1412 | fclose (stream); |
| 1413 | print_source_lines (current_source_symtab, line, line + 1, 0); |
| 1414 | set_internalvar (lookup_internalvar ("_"), |
| 1415 | value_from_longest (builtin_type_int, |
| 1416 | (LONGEST) line)); |
| 1417 | current_source_line = max (line - lines_to_list / 2, 1); |
| 1418 | return; |
| 1419 | } |
| 1420 | line++; |
| 1421 | } |
| 1422 | |
| 1423 | printf_filtered ("Expression not found\n"); |
| 1424 | fclose (stream); |
| 1425 | } |
| 1426 | |
| 1427 | static void |
| 1428 | reverse_search_command (char *regex, int from_tty) |
| 1429 | { |
| 1430 | int c; |
| 1431 | int desc; |
| 1432 | FILE *stream; |
| 1433 | int line; |
| 1434 | char *msg; |
| 1435 | |
| 1436 | line = last_line_listed - 1; |
| 1437 | |
| 1438 | msg = (char *) re_comp (regex); |
| 1439 | if (msg) |
| 1440 | error ("%s", msg); |
| 1441 | |
| 1442 | if (current_source_symtab == 0) |
| 1443 | select_source_symtab (0); |
| 1444 | |
| 1445 | desc = open_source_file (current_source_symtab); |
| 1446 | if (desc < 0) |
| 1447 | perror_with_name (current_source_symtab->filename); |
| 1448 | |
| 1449 | if (current_source_symtab->line_charpos == 0) |
| 1450 | find_source_lines (current_source_symtab, desc); |
| 1451 | |
| 1452 | if (line < 1 || line > current_source_symtab->nlines) |
| 1453 | { |
| 1454 | close (desc); |
| 1455 | error ("Expression not found"); |
| 1456 | } |
| 1457 | |
| 1458 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1459 | { |
| 1460 | close (desc); |
| 1461 | perror_with_name (current_source_symtab->filename); |
| 1462 | } |
| 1463 | |
| 1464 | stream = fdopen (desc, FDOPEN_MODE); |
| 1465 | clearerr (stream); |
| 1466 | while (line > 1) |
| 1467 | { |
| 1468 | /* FIXME!!! We walk right off the end of buf if we get a long line!!! */ |
| 1469 | char buf[4096]; /* Should be reasonable??? */ |
| 1470 | char *p = buf; |
| 1471 | |
| 1472 | c = getc (stream); |
| 1473 | if (c == EOF) |
| 1474 | break; |
| 1475 | do |
| 1476 | { |
| 1477 | *p++ = c; |
| 1478 | } |
| 1479 | while (c != '\n' && (c = getc (stream)) >= 0); |
| 1480 | |
| 1481 | #ifdef CRLF_SOURCE_FILES |
| 1482 | /* Remove the \r, if any, at the end of the line, otherwise |
| 1483 | regular expressions that end with $ or \n won't work. */ |
| 1484 | if (p - buf > 1 && p[-2] == '\r') |
| 1485 | { |
| 1486 | p--; |
| 1487 | p[-1] = '\n'; |
| 1488 | } |
| 1489 | #endif |
| 1490 | |
| 1491 | /* We now have a source line in buf; null terminate and match. */ |
| 1492 | *p = 0; |
| 1493 | if (re_exec (buf) > 0) |
| 1494 | { |
| 1495 | /* Match! */ |
| 1496 | fclose (stream); |
| 1497 | print_source_lines (current_source_symtab, line, line + 1, 0); |
| 1498 | set_internalvar (lookup_internalvar ("_"), |
| 1499 | value_from_longest (builtin_type_int, |
| 1500 | (LONGEST) line)); |
| 1501 | current_source_line = max (line - lines_to_list / 2, 1); |
| 1502 | return; |
| 1503 | } |
| 1504 | line--; |
| 1505 | if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) |
| 1506 | { |
| 1507 | fclose (stream); |
| 1508 | perror_with_name (current_source_symtab->filename); |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | printf_filtered ("Expression not found\n"); |
| 1513 | fclose (stream); |
| 1514 | return; |
| 1515 | } |
| 1516 | \f |
| 1517 | void |
| 1518 | _initialize_source (void) |
| 1519 | { |
| 1520 | struct cmd_list_element *c; |
| 1521 | current_source_symtab = 0; |
| 1522 | init_source_path (); |
| 1523 | |
| 1524 | /* The intention is to use POSIX Basic Regular Expressions. |
| 1525 | Always use the GNU regex routine for consistency across all hosts. |
| 1526 | Our current GNU regex.c does not have all the POSIX features, so this is |
| 1527 | just an approximation. */ |
| 1528 | re_set_syntax (RE_SYNTAX_GREP); |
| 1529 | |
| 1530 | c = add_cmd ("directory", class_files, directory_command, |
| 1531 | "Add directory DIR to beginning of search path for source files.\n\ |
| 1532 | Forget cached info on source file locations and line positions.\n\ |
| 1533 | DIR can also be $cwd for the current working directory, or $cdir for the\n\ |
| 1534 | directory in which the source file was compiled into object code.\n\ |
| 1535 | With no argument, reset the search path to $cdir:$cwd, the default.", |
| 1536 | &cmdlist); |
| 1537 | |
| 1538 | if (dbx_commands) |
| 1539 | add_com_alias ("use", "directory", class_files, 0); |
| 1540 | |
| 1541 | set_cmd_completer (c, filename_completer); |
| 1542 | |
| 1543 | add_cmd ("directories", no_class, show_directories, |
| 1544 | "Current search path for finding source files.\n\ |
| 1545 | $cwd in the path means the current working directory.\n\ |
| 1546 | $cdir in the path means the compilation directory of the source file.", |
| 1547 | &showlist); |
| 1548 | |
| 1549 | if (xdb_commands) |
| 1550 | { |
| 1551 | add_com_alias ("D", "directory", class_files, 0); |
| 1552 | add_cmd ("ld", no_class, show_directories, |
| 1553 | "Current search path for finding source files.\n\ |
| 1554 | $cwd in the path means the current working directory.\n\ |
| 1555 | $cdir in the path means the compilation directory of the source file.", |
| 1556 | &cmdlist); |
| 1557 | } |
| 1558 | |
| 1559 | add_info ("source", source_info, |
| 1560 | "Information about the current source file."); |
| 1561 | |
| 1562 | add_info ("line", line_info, |
| 1563 | concat ("Core addresses of the code for a source line.\n\ |
| 1564 | Line can be specified as\n\ |
| 1565 | LINENUM, to list around that line in current file,\n\ |
| 1566 | FILE:LINENUM, to list around that line in that file,\n\ |
| 1567 | FUNCTION, to list around beginning of that function,\n\ |
| 1568 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ |
| 1569 | ", "\ |
| 1570 | Default is to describe the last source line that was listed.\n\n\ |
| 1571 | This sets the default address for \"x\" to the line's first instruction\n\ |
| 1572 | so that \"x/i\" suffices to start examining the machine code.\n\ |
| 1573 | The address is also stored as the value of \"$_\".", NULL)); |
| 1574 | |
| 1575 | add_com ("forward-search", class_files, forward_search_command, |
| 1576 | "Search for regular expression (see regex(3)) from last line listed.\n\ |
| 1577 | The matching line number is also stored as the value of \"$_\"."); |
| 1578 | add_com_alias ("search", "forward-search", class_files, 0); |
| 1579 | |
| 1580 | add_com ("reverse-search", class_files, reverse_search_command, |
| 1581 | "Search backward for regular expression (see regex(3)) from last line listed.\n\ |
| 1582 | The matching line number is also stored as the value of \"$_\"."); |
| 1583 | |
| 1584 | if (xdb_commands) |
| 1585 | { |
| 1586 | add_com_alias ("/", "forward-search", class_files, 0); |
| 1587 | add_com_alias ("?", "reverse-search", class_files, 0); |
| 1588 | } |
| 1589 | |
| 1590 | add_show_from_set |
| 1591 | (add_set_cmd ("listsize", class_support, var_uinteger, |
| 1592 | (char *) &lines_to_list, |
| 1593 | "Set number of source lines gdb will list by default.", |
| 1594 | &setlist), |
| 1595 | &showlist); |
| 1596 | } |