1 /* Top level stuff for GDB, the GNU debugger. 2 3 Copyright (C) 1986-2013 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "top.h" 22 #include "target.h" 23 #include "inferior.h" 24 #include "symfile.h" 25 #include "gdbcore.h" 26 27 #include "exceptions.h" 28 #include "getopt.h" 29 30 #include <sys/types.h> 31 #include "gdb_stat.h" 32 #include <ctype.h> 33 34 #include "gdb_string.h" 35 #include "event-loop.h" 36 #include "ui-out.h" 37 38 #include "interps.h" 39 #include "main.h" 40 #include "source.h" 41 #include "cli/cli-cmds.h" 42 #include "python/python.h" 43 #include "objfiles.h" 44 #include "auto-load.h" 45 46 #include "filenames.h" 47 48 /* The selected interpreter. This will be used as a set command 49 variable, so it should always be malloc'ed - since 50 do_setshow_command will free it. */ 51 char *interpreter_p; 52 53 /* Whether xdb commands will be handled. */ 54 int xdb_commands = 0; 55 56 /* Whether dbx commands will be handled. */ 57 int dbx_commands = 0; 58 59 /* System root path, used to find libraries etc. */ 60 char *gdb_sysroot = 0; 61 62 /* GDB datadir, used to store data files. */ 63 char *gdb_datadir = 0; 64 65 /* Non-zero if GDB_DATADIR was provided on the command line. 66 This doesn't track whether data-directory is set later from the 67 command line, but we don't reread system.gdbinit when that happens. */ 68 static int gdb_datadir_provided = 0; 69 70 /* If gdb was configured with --with-python=/path, 71 the possibly relocated path to python's lib directory. */ 72 char *python_libdir = 0; 73 74 struct ui_file *gdb_stdout; 75 struct ui_file *gdb_stderr; 76 struct ui_file *gdb_stdlog; 77 struct ui_file *gdb_stdin; 78 /* Target IO streams. */ 79 struct ui_file *gdb_stdtargin; 80 struct ui_file *gdb_stdtarg; 81 struct ui_file *gdb_stdtargerr; 82 83 /* True if --batch or --batch-silent was seen. */ 84 int batch_flag = 0; 85 86 /* Support for the --batch-silent option. */ 87 int batch_silent = 0; 88 89 /* Support for --return-child-result option. 90 Set the default to -1 to return error in the case 91 that the program does not run or does not complete. */ 92 int return_child_result = 0; 93 int return_child_result_value = -1; 94 95 96 /* GDB as it has been invoked from the command line (i.e. argv[0]). */ 97 static char *gdb_program_name; 98 99 static void print_gdb_help (struct ui_file *); 100 101 /* Relocate a file or directory. PROGNAME is the name by which gdb 102 was invoked (i.e., argv[0]). INITIAL is the default value for the 103 file or directory. FLAG is true if the value is relocatable, false 104 otherwise. Returns a newly allocated string; this may return NULL 105 under the same conditions as make_relative_prefix. */ 106 107 static char * 108 relocate_path (const char *progname, const char *initial, int flag) 109 { 110 if (flag) 111 return make_relative_prefix (progname, BINDIR, initial); 112 return xstrdup (initial); 113 } 114 115 /* Like relocate_path, but specifically checks for a directory. 116 INITIAL is relocated according to the rules of relocate_path. If 117 the result is a directory, it is used; otherwise, INITIAL is used. 118 The chosen directory is then canonicalized using lrealpath. This 119 function always returns a newly-allocated string. */ 120 121 char * 122 relocate_gdb_directory (const char *initial, int flag) 123 { 124 char *dir; 125 126 dir = relocate_path (gdb_program_name, initial, flag); 127 if (dir) 128 { 129 struct stat s; 130 131 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode)) 132 { 133 xfree (dir); 134 dir = NULL; 135 } 136 } 137 if (!dir) 138 dir = xstrdup (initial); 139 140 /* Canonicalize the directory. */ 141 if (*dir) 142 { 143 char *canon_sysroot = lrealpath (dir); 144 145 if (canon_sysroot) 146 { 147 xfree (dir); 148 dir = canon_sysroot; 149 } 150 } 151 152 return dir; 153 } 154 155 /* Compute the locations of init files that GDB should source and 156 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If 157 there is no system gdbinit (resp. home gdbinit and local gdbinit) 158 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and 159 LOCAL_GDBINIT) is set to NULL. */ 160 static void 161 get_init_files (char **system_gdbinit, 162 char **home_gdbinit, 163 char **local_gdbinit) 164 { 165 static char *sysgdbinit = NULL; 166 static char *homeinit = NULL; 167 static char *localinit = NULL; 168 static int initialized = 0; 169 170 if (!initialized) 171 { 172 struct stat homebuf, cwdbuf, s; 173 char *homedir; 174 175 if (SYSTEM_GDBINIT[0]) 176 { 177 int datadir_len = strlen (GDB_DATADIR); 178 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT); 179 char *relocated_sysgdbinit; 180 181 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory 182 has been provided, search for SYSTEM_GDBINIT there. */ 183 if (gdb_datadir_provided 184 && datadir_len < sys_gdbinit_len 185 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0 186 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len])) 187 { 188 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR 189 to gdb_datadir. */ 190 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len); 191 char *p; 192 193 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p) 194 continue; 195 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p, 196 NULL); 197 xfree (tmp_sys_gdbinit); 198 } 199 else 200 { 201 relocated_sysgdbinit = relocate_path (gdb_program_name, 202 SYSTEM_GDBINIT, 203 SYSTEM_GDBINIT_RELOCATABLE); 204 } 205 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0) 206 sysgdbinit = relocated_sysgdbinit; 207 else 208 xfree (relocated_sysgdbinit); 209 } 210 211 homedir = getenv ("HOME"); 212 213 /* If the .gdbinit file in the current directory is the same as 214 the $HOME/.gdbinit file, it should not be sourced. homebuf 215 and cwdbuf are used in that purpose. Make sure that the stats 216 are zero in case one of them fails (this guarantees that they 217 won't match if either exists). */ 218 219 memset (&homebuf, 0, sizeof (struct stat)); 220 memset (&cwdbuf, 0, sizeof (struct stat)); 221 222 if (homedir) 223 { 224 homeinit = xstrprintf ("%s/%s", homedir, gdbinit); 225 if (stat (homeinit, &homebuf) != 0) 226 { 227 xfree (homeinit); 228 homeinit = NULL; 229 } 230 } 231 232 if (stat (gdbinit, &cwdbuf) == 0) 233 { 234 if (!homeinit 235 || memcmp ((char *) &homebuf, (char *) &cwdbuf, 236 sizeof (struct stat))) 237 localinit = gdbinit; 238 } 239 240 initialized = 1; 241 } 242 243 *system_gdbinit = sysgdbinit; 244 *home_gdbinit = homeinit; 245 *local_gdbinit = localinit; 246 } 247 248 /* Call command_loop. If it happens to return, pass that through as a 249 non-zero return status. */ 250 251 static int 252 captured_command_loop (void *data) 253 { 254 /* Top-level execution commands can be run on the background from 255 here on. */ 256 interpreter_async = 1; 257 258 current_interp_command_loop (); 259 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton 260 would clean things up (restoring the cleanup chain) to the state 261 they were just prior to the call. Technically, this means that 262 the do_cleanups() below is redundant. Unfortunately, many FUNCs 263 are not that well behaved. do_cleanups should either be replaced 264 with a do_cleanups call (to cover the problem) or an assertion 265 check to detect bad FUNCs code. */ 266 do_cleanups (all_cleanups ()); 267 /* If the command_loop returned, normally (rather than threw an 268 error) we try to quit. If the quit is aborted, catch_errors() 269 which called this catch the signal and restart the command 270 loop. */ 271 quit_command (NULL, instream == stdin); 272 return 1; 273 } 274 275 /* Arguments of --command option and its counterpart. */ 276 typedef struct cmdarg { 277 /* Type of this option. */ 278 enum { 279 /* Option type -x. */ 280 CMDARG_FILE, 281 282 /* Option type -ex. */ 283 CMDARG_COMMAND, 284 285 /* Option type -ix. */ 286 CMDARG_INIT_FILE, 287 288 /* Option type -iex. */ 289 CMDARG_INIT_COMMAND 290 } type; 291 292 /* Value of this option - filename or the GDB command itself. String memory 293 is not owned by this structure despite it is 'const'. */ 294 char *string; 295 } cmdarg_s; 296 297 /* Define type VEC (cmdarg_s). */ 298 DEF_VEC_O (cmdarg_s); 299 300 static int 301 captured_main (void *data) 302 { 303 struct captured_main_args *context = data; 304 int argc = context->argc; 305 char **argv = context->argv; 306 static int quiet = 0; 307 static int set_args = 0; 308 static int inhibit_home_gdbinit = 0; 309 310 /* Pointers to various arguments from command line. */ 311 char *symarg = NULL; 312 char *execarg = NULL; 313 char *pidarg = NULL; 314 char *corearg = NULL; 315 char *pid_or_core_arg = NULL; 316 char *cdarg = NULL; 317 char *ttyarg = NULL; 318 319 /* These are static so that we can take their address in an 320 initializer. */ 321 static int print_help; 322 static int print_version; 323 324 /* Pointers to all arguments of --command option. */ 325 VEC (cmdarg_s) *cmdarg_vec = NULL; 326 struct cmdarg *cmdarg_p; 327 328 /* Indices of all arguments of --directory option. */ 329 char **dirarg; 330 /* Allocated size. */ 331 int dirsize; 332 /* Number of elements used. */ 333 int ndir; 334 335 /* gdb init files. */ 336 char *system_gdbinit; 337 char *home_gdbinit; 338 char *local_gdbinit; 339 340 int i; 341 int save_auto_load; 342 struct objfile *objfile; 343 344 struct cleanup *pre_stat_chain; 345 346 #ifdef HAVE_SBRK 347 /* Set this before calling make_command_stats_cleanup. */ 348 lim_at_start = (char *) sbrk (0); 349 #endif 350 351 pre_stat_chain = make_command_stats_cleanup (0); 352 353 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 354 setlocale (LC_MESSAGES, ""); 355 #endif 356 #if defined (HAVE_SETLOCALE) 357 setlocale (LC_CTYPE, ""); 358 #endif 359 bindtextdomain (PACKAGE, LOCALEDIR); 360 textdomain (PACKAGE); 361 362 bfd_init (); 363 364 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec); 365 dirsize = 1; 366 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); 367 ndir = 0; 368 369 clear_quit_flag (); 370 saved_command_line = (char *) xmalloc (saved_command_line_size); 371 saved_command_line[0] = '\0'; 372 instream = stdin; 373 374 gdb_stdout = stdio_fileopen (stdout); 375 gdb_stderr = stdio_fileopen (stderr); 376 gdb_stdlog = gdb_stderr; /* for moment */ 377 gdb_stdtarg = gdb_stderr; /* for moment */ 378 gdb_stdin = stdio_fileopen (stdin); 379 gdb_stdtargerr = gdb_stderr; /* for moment */ 380 gdb_stdtargin = gdb_stdin; /* for moment */ 381 382 #ifdef __MINGW32__ 383 /* On Windows, argv[0] is not necessarily set to absolute form when 384 GDB is found along PATH, without which relocation doesn't work. */ 385 gdb_program_name = windows_get_absolute_argv0 (argv[0]); 386 #else 387 gdb_program_name = xstrdup (argv[0]); 388 #endif 389 390 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf))) 391 /* Don't use *_filtered or warning() (which relies on 392 current_target) until after initialize_all_files(). */ 393 fprintf_unfiltered (gdb_stderr, 394 _("%s: warning: error finding " 395 "working directory: %s\n"), 396 argv[0], safe_strerror (errno)); 397 398 current_directory = gdb_dirbuf; 399 400 /* Set the sysroot path. */ 401 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT, 402 TARGET_SYSTEM_ROOT_RELOCATABLE); 403 404 debug_file_directory = relocate_gdb_directory (DEBUGDIR, 405 DEBUGDIR_RELOCATABLE); 406 407 gdb_datadir = relocate_gdb_directory (GDB_DATADIR, 408 GDB_DATADIR_RELOCATABLE); 409 410 #ifdef WITH_PYTHON_PATH 411 { 412 /* For later use in helping Python find itself. */ 413 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL); 414 415 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE); 416 xfree (tmp); 417 } 418 #endif 419 420 #ifdef RELOC_SRCDIR 421 add_substitute_path_rule (RELOC_SRCDIR, 422 make_relative_prefix (gdb_program_name, BINDIR, 423 RELOC_SRCDIR)); 424 #endif 425 426 /* There will always be an interpreter. Either the one passed into 427 this captured main, or one specified by the user at start up, or 428 the console. Initialize the interpreter to the one requested by 429 the application. */ 430 interpreter_p = xstrdup (context->interpreter_p); 431 432 /* Parse arguments and options. */ 433 { 434 int c; 435 /* When var field is 0, use flag field to record the equivalent 436 short option (or arbitrary numbers starting at 10 for those 437 with no equivalent). */ 438 enum { 439 OPT_SE = 10, 440 OPT_CD, 441 OPT_ANNOTATE, 442 OPT_STATISTICS, 443 OPT_TUI, 444 OPT_NOWINDOWS, 445 OPT_WINDOWS, 446 OPT_IX, 447 OPT_IEX 448 }; 449 static struct option long_options[] = 450 { 451 {"tui", no_argument, 0, OPT_TUI}, 452 {"xdb", no_argument, &xdb_commands, 1}, 453 {"dbx", no_argument, &dbx_commands, 1}, 454 {"readnow", no_argument, &readnow_symbol_files, 1}, 455 {"r", no_argument, &readnow_symbol_files, 1}, 456 {"quiet", no_argument, &quiet, 1}, 457 {"q", no_argument, &quiet, 1}, 458 {"silent", no_argument, &quiet, 1}, 459 {"nh", no_argument, &inhibit_home_gdbinit, 1}, 460 {"nx", no_argument, &inhibit_gdbinit, 1}, 461 {"n", no_argument, &inhibit_gdbinit, 1}, 462 {"batch-silent", no_argument, 0, 'B'}, 463 {"batch", no_argument, &batch_flag, 1}, 464 465 /* This is a synonym for "--annotate=1". --annotate is now 466 preferred, but keep this here for a long time because people 467 will be running emacses which use --fullname. */ 468 {"fullname", no_argument, 0, 'f'}, 469 {"f", no_argument, 0, 'f'}, 470 471 {"annotate", required_argument, 0, OPT_ANNOTATE}, 472 {"help", no_argument, &print_help, 1}, 473 {"se", required_argument, 0, OPT_SE}, 474 {"symbols", required_argument, 0, 's'}, 475 {"s", required_argument, 0, 's'}, 476 {"exec", required_argument, 0, 'e'}, 477 {"e", required_argument, 0, 'e'}, 478 {"core", required_argument, 0, 'c'}, 479 {"c", required_argument, 0, 'c'}, 480 {"pid", required_argument, 0, 'p'}, 481 {"p", required_argument, 0, 'p'}, 482 {"command", required_argument, 0, 'x'}, 483 {"eval-command", required_argument, 0, 'X'}, 484 {"version", no_argument, &print_version, 1}, 485 {"x", required_argument, 0, 'x'}, 486 {"ex", required_argument, 0, 'X'}, 487 {"init-command", required_argument, 0, OPT_IX}, 488 {"init-eval-command", required_argument, 0, OPT_IEX}, 489 {"ix", required_argument, 0, OPT_IX}, 490 {"iex", required_argument, 0, OPT_IEX}, 491 #ifdef GDBTK 492 {"tclcommand", required_argument, 0, 'z'}, 493 {"enable-external-editor", no_argument, 0, 'y'}, 494 {"editor-command", required_argument, 0, 'w'}, 495 #endif 496 {"ui", required_argument, 0, 'i'}, 497 {"interpreter", required_argument, 0, 'i'}, 498 {"i", required_argument, 0, 'i'}, 499 {"directory", required_argument, 0, 'd'}, 500 {"d", required_argument, 0, 'd'}, 501 {"data-directory", required_argument, 0, 'D'}, 502 {"cd", required_argument, 0, OPT_CD}, 503 {"tty", required_argument, 0, 't'}, 504 {"baud", required_argument, 0, 'b'}, 505 {"b", required_argument, 0, 'b'}, 506 {"nw", no_argument, NULL, OPT_NOWINDOWS}, 507 {"nowindows", no_argument, NULL, OPT_NOWINDOWS}, 508 {"w", no_argument, NULL, OPT_WINDOWS}, 509 {"windows", no_argument, NULL, OPT_WINDOWS}, 510 {"statistics", no_argument, 0, OPT_STATISTICS}, 511 {"write", no_argument, &write_files, 1}, 512 {"args", no_argument, &set_args, 1}, 513 {"l", required_argument, 0, 'l'}, 514 {"return-child-result", no_argument, &return_child_result, 1}, 515 {0, no_argument, 0, 0} 516 }; 517 518 while (1) 519 { 520 int option_index; 521 522 c = getopt_long_only (argc, argv, "", 523 long_options, &option_index); 524 if (c == EOF || set_args) 525 break; 526 527 /* Long option that takes an argument. */ 528 if (c == 0 && long_options[option_index].flag == 0) 529 c = long_options[option_index].val; 530 531 switch (c) 532 { 533 case 0: 534 /* Long option that just sets a flag. */ 535 break; 536 case OPT_SE: 537 symarg = optarg; 538 execarg = optarg; 539 break; 540 case OPT_CD: 541 cdarg = optarg; 542 break; 543 case OPT_ANNOTATE: 544 /* FIXME: what if the syntax is wrong (e.g. not digits)? */ 545 annotation_level = atoi (optarg); 546 break; 547 case OPT_STATISTICS: 548 /* Enable the display of both time and space usage. */ 549 set_display_time (1); 550 set_display_space (1); 551 break; 552 case OPT_TUI: 553 /* --tui is equivalent to -i=tui. */ 554 #ifdef TUI 555 xfree (interpreter_p); 556 interpreter_p = xstrdup (INTERP_TUI); 557 #else 558 fprintf_unfiltered (gdb_stderr, 559 _("%s: TUI mode is not supported\n"), 560 argv[0]); 561 exit (1); 562 #endif 563 break; 564 case OPT_WINDOWS: 565 /* FIXME: cagney/2003-03-01: Not sure if this option is 566 actually useful, and if it is, what it should do. */ 567 #ifdef GDBTK 568 /* --windows is equivalent to -i=insight. */ 569 xfree (interpreter_p); 570 interpreter_p = xstrdup (INTERP_INSIGHT); 571 #endif 572 use_windows = 1; 573 break; 574 case OPT_NOWINDOWS: 575 /* -nw is equivalent to -i=console. */ 576 xfree (interpreter_p); 577 interpreter_p = xstrdup (INTERP_CONSOLE); 578 use_windows = 0; 579 break; 580 case 'f': 581 annotation_level = 1; 582 /* We have probably been invoked from emacs. Disable 583 window interface. */ 584 use_windows = 0; 585 break; 586 case 's': 587 symarg = optarg; 588 break; 589 case 'e': 590 execarg = optarg; 591 break; 592 case 'c': 593 corearg = optarg; 594 break; 595 case 'p': 596 pidarg = optarg; 597 break; 598 case 'x': 599 { 600 struct cmdarg cmdarg = { CMDARG_FILE, optarg }; 601 602 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); 603 } 604 break; 605 case 'X': 606 { 607 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg }; 608 609 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); 610 } 611 break; 612 case OPT_IX: 613 { 614 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg }; 615 616 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); 617 } 618 break; 619 case OPT_IEX: 620 { 621 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg }; 622 623 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); 624 } 625 break; 626 case 'B': 627 batch_flag = batch_silent = 1; 628 gdb_stdout = ui_file_new(); 629 break; 630 case 'D': 631 xfree (gdb_datadir); 632 gdb_datadir = xstrdup (optarg); 633 gdb_datadir_provided = 1; 634 break; 635 #ifdef GDBTK 636 case 'z': 637 { 638 extern int gdbtk_test (char *); 639 640 if (!gdbtk_test (optarg)) 641 { 642 fprintf_unfiltered (gdb_stderr, 643 _("%s: unable to load " 644 "tclcommand file \"%s\""), 645 argv[0], optarg); 646 exit (1); 647 } 648 break; 649 } 650 case 'y': 651 /* Backwards compatibility only. */ 652 break; 653 case 'w': 654 { 655 /* Set the external editor commands when gdb is farming out files 656 to be edited by another program. */ 657 extern char *external_editor_command; 658 659 external_editor_command = xstrdup (optarg); 660 break; 661 } 662 #endif /* GDBTK */ 663 case 'i': 664 xfree (interpreter_p); 665 interpreter_p = xstrdup (optarg); 666 break; 667 case 'd': 668 dirarg[ndir++] = optarg; 669 if (ndir >= dirsize) 670 { 671 dirsize *= 2; 672 dirarg = (char **) xrealloc ((char *) dirarg, 673 dirsize * sizeof (*dirarg)); 674 } 675 break; 676 case 't': 677 ttyarg = optarg; 678 break; 679 case 'q': 680 quiet = 1; 681 break; 682 case 'b': 683 { 684 int i; 685 char *p; 686 687 i = strtol (optarg, &p, 0); 688 if (i == 0 && p == optarg) 689 690 /* Don't use *_filtered or warning() (which relies on 691 current_target) until after initialize_all_files(). */ 692 693 fprintf_unfiltered 694 (gdb_stderr, 695 _("warning: could not set baud rate to `%s'.\n"), optarg); 696 else 697 baud_rate = i; 698 } 699 break; 700 case 'l': 701 { 702 int i; 703 char *p; 704 705 i = strtol (optarg, &p, 0); 706 if (i == 0 && p == optarg) 707 708 /* Don't use *_filtered or warning() (which relies on 709 current_target) until after initialize_all_files(). */ 710 711 fprintf_unfiltered (gdb_stderr, 712 _("warning: could not set " 713 "timeout limit to `%s'.\n"), optarg); 714 else 715 remote_timeout = i; 716 } 717 break; 718 719 case '?': 720 fprintf_unfiltered (gdb_stderr, 721 _("Use `%s --help' for a " 722 "complete list of options.\n"), 723 argv[0]); 724 exit (1); 725 } 726 } 727 728 /* If --help or --version, disable window interface. */ 729 if (print_help || print_version) 730 { 731 use_windows = 0; 732 } 733 734 if (batch_flag) 735 quiet = 1; 736 } 737 738 /* Initialize all files. Give the interpreter a chance to take 739 control of the console via the deprecated_init_ui_hook (). */ 740 gdb_init (gdb_program_name); 741 742 /* Now that gdb_init has created the initial inferior, we're in 743 position to set args for that inferior. */ 744 if (set_args) 745 { 746 /* The remaining options are the command-line options for the 747 inferior. The first one is the sym/exec file, and the rest 748 are arguments. */ 749 if (optind >= argc) 750 { 751 fprintf_unfiltered (gdb_stderr, 752 _("%s: `--args' specified but " 753 "no program specified\n"), 754 argv[0]); 755 exit (1); 756 } 757 symarg = argv[optind]; 758 execarg = argv[optind]; 759 ++optind; 760 set_inferior_args_vector (argc - optind, &argv[optind]); 761 } 762 else 763 { 764 /* OK, that's all the options. */ 765 766 /* The first argument, if specified, is the name of the 767 executable. */ 768 if (optind < argc) 769 { 770 symarg = argv[optind]; 771 execarg = argv[optind]; 772 optind++; 773 } 774 775 /* If the user hasn't already specified a PID or the name of a 776 core file, then a second optional argument is allowed. If 777 present, this argument should be interpreted as either a 778 PID or a core file, whichever works. */ 779 if (pidarg == NULL && corearg == NULL && optind < argc) 780 { 781 pid_or_core_arg = argv[optind]; 782 optind++; 783 } 784 785 /* Any argument left on the command line is unexpected and 786 will be ignored. Inform the user. */ 787 if (optind < argc) 788 fprintf_unfiltered (gdb_stderr, 789 _("Excess command line " 790 "arguments ignored. (%s%s)\n"), 791 argv[optind], 792 (optind == argc - 1) ? "" : " ..."); 793 } 794 795 /* Lookup gdbinit files. Note that the gdbinit file name may be 796 overriden during file initialization, so get_init_files should be 797 called after gdb_init. */ 798 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit); 799 800 /* Do these (and anything which might call wrap_here or *_filtered) 801 after initialize_all_files() but before the interpreter has been 802 installed. Otherwize the help/version messages will be eaten by 803 the interpreter's output handler. */ 804 805 if (print_version) 806 { 807 print_gdb_version (gdb_stdout); 808 wrap_here (""); 809 printf_filtered ("\n"); 810 exit (0); 811 } 812 813 if (print_help) 814 { 815 print_gdb_help (gdb_stdout); 816 fputs_unfiltered ("\n", gdb_stdout); 817 exit (0); 818 } 819 820 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets 821 GDB retain the old MI1 interpreter startup behavior. Output the 822 copyright message before the interpreter is installed. That way 823 it isn't encapsulated in MI output. */ 824 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0) 825 { 826 /* Print all the junk at the top, with trailing "..." if we are 827 about to read a symbol file (possibly slowly). */ 828 print_gdb_version (gdb_stdout); 829 if (symarg) 830 printf_filtered (".."); 831 wrap_here (""); 832 printf_filtered ("\n"); 833 gdb_flush (gdb_stdout); /* Force to screen during slow 834 operations. */ 835 } 836 837 /* Install the default UI. All the interpreters should have had a 838 look at things by now. Initialize the default interpreter. */ 839 840 { 841 /* Find it. */ 842 struct interp *interp = interp_lookup (interpreter_p); 843 844 if (interp == NULL) 845 error (_("Interpreter `%s' unrecognized"), interpreter_p); 846 /* Install it. */ 847 if (!interp_set (interp, 1)) 848 { 849 fprintf_unfiltered (gdb_stderr, 850 "Interpreter `%s' failed to initialize.\n", 851 interpreter_p); 852 exit (1); 853 } 854 } 855 856 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets 857 GDB retain the old MI1 interpreter startup behavior. Output the 858 copyright message after the interpreter is installed when it is 859 any sane interpreter. */ 860 if (!quiet && !current_interp_named_p (INTERP_MI1)) 861 { 862 /* Print all the junk at the top, with trailing "..." if we are 863 about to read a symbol file (possibly slowly). */ 864 print_gdb_version (gdb_stdout); 865 if (symarg) 866 printf_filtered (".."); 867 wrap_here (""); 868 printf_filtered ("\n"); 869 gdb_flush (gdb_stdout); /* Force to screen during slow 870 operations. */ 871 } 872 873 /* Set off error and warning messages with a blank line. */ 874 error_pre_print = "\n"; 875 quit_pre_print = error_pre_print; 876 warning_pre_print = _("\nwarning: "); 877 878 /* Read and execute the system-wide gdbinit file, if it exists. 879 This is done *before* all the command line arguments are 880 processed; it sets global parameters, which are independent of 881 what file you are debugging or what directory you are in. */ 882 if (system_gdbinit && !inhibit_gdbinit) 883 catch_command_errors (source_script, system_gdbinit, 0, RETURN_MASK_ALL); 884 885 /* Read and execute $HOME/.gdbinit file, if it exists. This is done 886 *before* all the command line arguments are processed; it sets 887 global parameters, which are independent of what file you are 888 debugging or what directory you are in. */ 889 890 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit) 891 catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL); 892 893 /* Process '-ix' and '-iex' options early. */ 894 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++) 895 switch (cmdarg_p->type) 896 { 897 case CMDARG_INIT_FILE: 898 catch_command_errors (source_script, cmdarg_p->string, 899 !batch_flag, RETURN_MASK_ALL); 900 break; 901 case CMDARG_INIT_COMMAND: 902 catch_command_errors (execute_command, cmdarg_p->string, 903 !batch_flag, RETURN_MASK_ALL); 904 break; 905 } 906 907 /* Now perform all the actions indicated by the arguments. */ 908 if (cdarg != NULL) 909 { 910 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL); 911 } 912 913 for (i = 0; i < ndir; i++) 914 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL); 915 xfree (dirarg); 916 917 /* Skip auto-loading section-specified scripts until we've sourced 918 local_gdbinit (which is often used to augment the source search 919 path). */ 920 save_auto_load = global_auto_load; 921 global_auto_load = 0; 922 923 if (execarg != NULL 924 && symarg != NULL 925 && strcmp (execarg, symarg) == 0) 926 { 927 /* The exec file and the symbol-file are the same. If we can't 928 open it, better only print one error message. 929 catch_command_errors returns non-zero on success! */ 930 if (catch_command_errors (exec_file_attach, execarg, 931 !batch_flag, RETURN_MASK_ALL)) 932 catch_command_errors (symbol_file_add_main, symarg, 933 !batch_flag, RETURN_MASK_ALL); 934 } 935 else 936 { 937 if (execarg != NULL) 938 catch_command_errors (exec_file_attach, execarg, 939 !batch_flag, RETURN_MASK_ALL); 940 if (symarg != NULL) 941 catch_command_errors (symbol_file_add_main, symarg, 942 !batch_flag, RETURN_MASK_ALL); 943 } 944 945 if (corearg && pidarg) 946 error (_("Can't attach to process and specify " 947 "a core file at the same time.")); 948 949 if (corearg != NULL) 950 catch_command_errors (core_file_command, corearg, 951 !batch_flag, RETURN_MASK_ALL); 952 else if (pidarg != NULL) 953 catch_command_errors (attach_command, pidarg, 954 !batch_flag, RETURN_MASK_ALL); 955 else if (pid_or_core_arg) 956 { 957 /* The user specified 'gdb program pid' or gdb program core'. 958 If pid_or_core_arg's first character is a digit, try attach 959 first and then corefile. Otherwise try just corefile. */ 960 961 if (isdigit (pid_or_core_arg[0])) 962 { 963 if (catch_command_errors (attach_command, pid_or_core_arg, 964 !batch_flag, RETURN_MASK_ALL) == 0) 965 catch_command_errors (core_file_command, pid_or_core_arg, 966 !batch_flag, RETURN_MASK_ALL); 967 } 968 else /* Can't be a pid, better be a corefile. */ 969 catch_command_errors (core_file_command, pid_or_core_arg, 970 !batch_flag, RETURN_MASK_ALL); 971 } 972 973 if (ttyarg != NULL) 974 set_inferior_io_terminal (ttyarg); 975 976 /* Error messages should no longer be distinguished with extra output. */ 977 error_pre_print = NULL; 978 quit_pre_print = NULL; 979 warning_pre_print = _("warning: "); 980 981 /* Read the .gdbinit file in the current directory, *if* it isn't 982 the same as the $HOME/.gdbinit file (it should exist, also). */ 983 if (local_gdbinit) 984 { 985 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit); 986 987 if (!inhibit_gdbinit && auto_load_local_gdbinit 988 && file_is_auto_load_safe (local_gdbinit, 989 _("auto-load: Loading .gdbinit " 990 "file \"%s\".\n"), 991 local_gdbinit)) 992 { 993 auto_load_local_gdbinit_loaded = 1; 994 995 catch_command_errors (source_script, local_gdbinit, 0, 996 RETURN_MASK_ALL); 997 } 998 } 999 1000 /* Now that all .gdbinit's have been read and all -d options have been 1001 processed, we can read any scripts mentioned in SYMARG. 1002 We wait until now because it is common to add to the source search 1003 path in local_gdbinit. */ 1004 global_auto_load = save_auto_load; 1005 ALL_OBJFILES (objfile) 1006 load_auto_scripts_for_objfile (objfile); 1007 1008 /* Process '-x' and '-ex' options. */ 1009 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++) 1010 switch (cmdarg_p->type) 1011 { 1012 case CMDARG_FILE: 1013 catch_command_errors (source_script, cmdarg_p->string, 1014 !batch_flag, RETURN_MASK_ALL); 1015 break; 1016 case CMDARG_COMMAND: 1017 catch_command_errors (execute_command, cmdarg_p->string, 1018 !batch_flag, RETURN_MASK_ALL); 1019 break; 1020 } 1021 1022 /* Read in the old history after all the command files have been 1023 read. */ 1024 init_history (); 1025 1026 if (batch_flag) 1027 { 1028 /* We have hit the end of the batch file. */ 1029 quit_force (NULL, 0); 1030 } 1031 1032 /* Show time and/or space usage. */ 1033 do_cleanups (pre_stat_chain); 1034 1035 /* NOTE: cagney/1999-11-07: There is probably no reason for not 1036 moving this loop and the code found in captured_command_loop() 1037 into the command_loop() proper. The main thing holding back that 1038 change - SET_TOP_LEVEL() - has been eliminated. */ 1039 while (1) 1040 { 1041 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL); 1042 } 1043 /* No exit -- exit is through quit_command. */ 1044 } 1045 1046 int 1047 gdb_main (struct captured_main_args *args) 1048 { 1049 use_windows = args->use_windows; 1050 catch_errors (captured_main, args, "", RETURN_MASK_ALL); 1051 /* The only way to end up here is by an error (normal exit is 1052 handled by quit_force()), hence always return an error status. */ 1053 return 1; 1054 } 1055 1056 1057 /* Don't use *_filtered for printing help. We don't want to prompt 1058 for continue no matter how small the screen or how much we're going 1059 to print. */ 1060 1061 static void 1062 print_gdb_help (struct ui_file *stream) 1063 { 1064 char *system_gdbinit; 1065 char *home_gdbinit; 1066 char *local_gdbinit; 1067 1068 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit); 1069 1070 fputs_unfiltered (_("\ 1071 This is the GNU debugger. Usage:\n\n\ 1072 gdb [options] [executable-file [core-file or process-id]]\n\ 1073 gdb [options] --args executable-file [inferior-arguments ...]\n\n\ 1074 Options:\n\n\ 1075 "), stream); 1076 fputs_unfiltered (_("\ 1077 --args Arguments after executable-file are passed to inferior\n\ 1078 "), stream); 1079 fputs_unfiltered (_("\ 1080 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\ 1081 --batch Exit after processing options.\n\ 1082 --batch-silent As for --batch, but suppress all gdb stdout output.\n\ 1083 --return-child-result\n\ 1084 GDB exit code will be the child's exit code.\n\ 1085 --cd=DIR Change current directory to DIR.\n\ 1086 --command=FILE, -x Execute GDB commands from FILE.\n\ 1087 --eval-command=COMMAND, -ex\n\ 1088 Execute a single GDB command.\n\ 1089 May be used multiple times and in conjunction\n\ 1090 with --command.\n\ 1091 --init-command=FILE, -ix Like -x but execute it before loading inferior.\n\ 1092 --init-eval-command=COMMAND, -iex Like -ex but before loading inferior.\n\ 1093 --core=COREFILE Analyze the core dump COREFILE.\n\ 1094 --pid=PID Attach to running process PID.\n\ 1095 "), stream); 1096 fputs_unfiltered (_("\ 1097 --dbx DBX compatibility mode.\n\ 1098 --directory=DIR Search for source files in DIR.\n\ 1099 --exec=EXECFILE Use EXECFILE as the executable.\n\ 1100 --fullname Output information used by emacs-GDB interface.\n\ 1101 --help Print this message.\n\ 1102 "), stream); 1103 fputs_unfiltered (_("\ 1104 --interpreter=INTERP\n\ 1105 Select a specific interpreter / user interface\n\ 1106 "), stream); 1107 fputs_unfiltered (_("\ 1108 -l TIMEOUT Set timeout in seconds for remote debugging.\n\ 1109 --nw Do not use a window interface.\n\ 1110 --nx Do not read any "), stream); 1111 fputs_unfiltered (gdbinit, stream); 1112 fputs_unfiltered (_(" files.\n\ 1113 --nh Do not read "), stream); 1114 fputs_unfiltered (gdbinit, stream); 1115 fputs_unfiltered (_(" file from home directory.\n\ 1116 --quiet Do not print version number on startup.\n\ 1117 --readnow Fully read symbol files on first access.\n\ 1118 "), stream); 1119 fputs_unfiltered (_("\ 1120 --se=FILE Use FILE as symbol file and executable file.\n\ 1121 --symbols=SYMFILE Read symbols from SYMFILE.\n\ 1122 --tty=TTY Use TTY for input/output by the program being debugged.\n\ 1123 "), stream); 1124 #if defined(TUI) 1125 fputs_unfiltered (_("\ 1126 --tui Use a terminal user interface.\n\ 1127 "), stream); 1128 #endif 1129 fputs_unfiltered (_("\ 1130 --version Print version information and then exit.\n\ 1131 -w Use a window interface.\n\ 1132 --write Set writing into executable and core files.\n\ 1133 --xdb XDB compatibility mode.\n\ 1134 "), stream); 1135 fputs_unfiltered (_("\n\ 1136 At startup, GDB reads the following init files and executes their commands:\n\ 1137 "), stream); 1138 if (system_gdbinit) 1139 fprintf_unfiltered (stream, _("\ 1140 * system-wide init file: %s\n\ 1141 "), system_gdbinit); 1142 if (home_gdbinit) 1143 fprintf_unfiltered (stream, _("\ 1144 * user-specific init file: %s\n\ 1145 "), home_gdbinit); 1146 if (local_gdbinit) 1147 fprintf_unfiltered (stream, _("\ 1148 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\ 1149 "), local_gdbinit); 1150 fputs_unfiltered (_("\n\ 1151 For more information, type \"help\" from within GDB, or consult the\n\ 1152 GDB manual (available as on-line info or a printed manual).\n\ 1153 "), stream); 1154 if (REPORT_BUGS_TO[0] && stream == gdb_stdout) 1155 fprintf_unfiltered (stream, _("\ 1156 Report bugs to \"%s\".\n\ 1157 "), REPORT_BUGS_TO); 1158 } 1159