1 /* Top level stuff for GDB, the GNU debugger. 2 3 Copyright (C) 1986-2005, 2007-2012 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 45 /* The selected interpreter. This will be used as a set command 46 variable, so it should always be malloc'ed - since 47 do_setshow_command will free it. */ 48 char *interpreter_p; 49 50 /* Whether xdb commands will be handled. */ 51 int xdb_commands = 0; 52 53 /* Whether dbx commands will be handled. */ 54 int dbx_commands = 0; 55 56 /* System root path, used to find libraries etc. */ 57 char *gdb_sysroot = 0; 58 59 /* GDB datadir, used to store data files. */ 60 char *gdb_datadir = 0; 61 62 /* If gdb was configured with --with-python=/path, 63 the possibly relocated path to python's lib directory. */ 64 char *python_libdir = 0; 65 66 struct ui_file *gdb_stdout; 67 struct ui_file *gdb_stderr; 68 struct ui_file *gdb_stdlog; 69 struct ui_file *gdb_stdin; 70 /* Target IO streams. */ 71 struct ui_file *gdb_stdtargin; 72 struct ui_file *gdb_stdtarg; 73 struct ui_file *gdb_stdtargerr; 74 75 /* True if --batch or --batch-silent was seen. */ 76 int batch_flag = 0; 77 78 /* Support for the --batch-silent option. */ 79 int batch_silent = 0; 80 81 /* Support for --return-child-result option. 82 Set the default to -1 to return error in the case 83 that the program does not run or does not complete. */ 84 int return_child_result = 0; 85 int return_child_result_value = -1; 86 87 /* Whether to enable writing into executable and core files. */ 88 extern int write_files; 89 90 /* GDB as it has been invoked from the command line (i.e. argv[0]). */ 91 static char *gdb_program_name; 92 93 /* DragonFly kgdb support */ 94 int kernel_debugger; 95 96 static void print_gdb_help (struct ui_file *); 97 98 /* These two are used to set the external editor commands when gdb is 99 farming out files to be edited by another program. */ 100 101 extern char *external_editor_command; 102 103 /* Relocate a file or directory. PROGNAME is the name by which gdb 104 was invoked (i.e., argv[0]). INITIAL is the default value for the 105 file or directory. FLAG is true if the value is relocatable, false 106 otherwise. Returns a newly allocated string; this may return NULL 107 under the same conditions as make_relative_prefix. */ 108 109 static char * 110 relocate_path (const char *progname, const char *initial, int flag) 111 { 112 if (flag) 113 return make_relative_prefix (progname, BINDIR, initial); 114 return xstrdup (initial); 115 } 116 117 /* Like relocate_path, but specifically checks for a directory. 118 INITIAL is relocated according to the rules of relocate_path. If 119 the result is a directory, it is used; otherwise, INITIAL is used. 120 The chosen directory is then canonicalized using lrealpath. This 121 function always returns a newly-allocated string. */ 122 123 char * 124 relocate_gdb_directory (const char *initial, int flag) 125 { 126 char *dir; 127 128 dir = relocate_path (gdb_program_name, initial, flag); 129 if (dir) 130 { 131 struct stat s; 132 133 if (stat (dir, &s) != 0 || !S_ISDIR (s.st_mode)) 134 { 135 xfree (dir); 136 dir = NULL; 137 } 138 } 139 if (!dir) 140 dir = xstrdup (initial); 141 142 /* Canonicalize the directory. */ 143 if (*dir) 144 { 145 char *canon_sysroot = lrealpath (dir); 146 147 if (canon_sysroot) 148 { 149 xfree (dir); 150 dir = canon_sysroot; 151 } 152 } 153 154 return dir; 155 } 156 157 /* Compute the locations of init files that GDB should source and 158 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If 159 there is no system gdbinit (resp. home gdbinit and local gdbinit) 160 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and 161 LOCAL_GDBINIT) is set to NULL. */ 162 static void 163 get_init_files (char **system_gdbinit, 164 char **home_gdbinit, 165 char **local_gdbinit) 166 { 167 static char *sysgdbinit = NULL; 168 static char *homeinit = NULL; 169 static char *localinit = NULL; 170 static int initialized = 0; 171 172 if (!initialized) 173 { 174 struct stat homebuf, cwdbuf, s; 175 char *homedir, *relocated_sysgdbinit; 176 177 if (SYSTEM_GDBINIT[0]) 178 { 179 relocated_sysgdbinit = relocate_path (gdb_program_name, 180 SYSTEM_GDBINIT, 181 SYSTEM_GDBINIT_RELOCATABLE); 182 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0) 183 sysgdbinit = relocated_sysgdbinit; 184 else 185 xfree (relocated_sysgdbinit); 186 } 187 188 homedir = getenv ("HOME"); 189 190 /* If the .gdbinit file in the current directory is the same as 191 the $HOME/.gdbinit file, it should not be sourced. homebuf 192 and cwdbuf are used in that purpose. Make sure that the stats 193 are zero in case one of them fails (this guarantees that they 194 won't match if either exists). */ 195 196 memset (&homebuf, 0, sizeof (struct stat)); 197 memset (&cwdbuf, 0, sizeof (struct stat)); 198 199 if (homedir) 200 { 201 homeinit = xstrprintf ("%s/%s", homedir, gdbinit); 202 if (stat (homeinit, &homebuf) != 0) 203 { 204 xfree (homeinit); 205 homeinit = NULL; 206 } 207 } 208 209 if (stat (gdbinit, &cwdbuf) == 0) 210 { 211 if (!homeinit 212 || memcmp ((char *) &homebuf, (char *) &cwdbuf, 213 sizeof (struct stat))) 214 localinit = gdbinit; 215 } 216 217 initialized = 1; 218 } 219 220 *system_gdbinit = sysgdbinit; 221 *home_gdbinit = homeinit; 222 *local_gdbinit = localinit; 223 } 224 225 /* Call command_loop. If it happens to return, pass that through as a 226 non-zero return status. */ 227 228 static int 229 captured_command_loop (void *data) 230 { 231 /* Top-level execution commands can be run on the background from 232 here on. */ 233 interpreter_async = 1; 234 235 current_interp_command_loop (); 236 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton 237 would clean things up (restoring the cleanup chain) to the state 238 they were just prior to the call. Technically, this means that 239 the do_cleanups() below is redundant. Unfortunately, many FUNCs 240 are not that well behaved. do_cleanups should either be replaced 241 with a do_cleanups call (to cover the problem) or an assertion 242 check to detect bad FUNCs code. */ 243 do_cleanups (ALL_CLEANUPS); 244 /* If the command_loop returned, normally (rather than threw an 245 error) we try to quit. If the quit is aborted, catch_errors() 246 which called this catch the signal and restart the command 247 loop. */ 248 quit_command (NULL, instream == stdin); 249 return 1; 250 } 251 252 static int 253 captured_main (void *data) 254 { 255 struct captured_main_args *context = data; 256 int argc = context->argc; 257 char **argv = context->argv; 258 static int quiet = 0; 259 static int set_args = 0; 260 261 /* Pointers to various arguments from command line. */ 262 char *symarg = NULL; 263 char *execarg = NULL; 264 char *pidarg = NULL; 265 char *corearg = NULL; 266 char *pid_or_core_arg = NULL; 267 char *cdarg = NULL; 268 char *ttyarg = NULL; 269 270 /* These are static so that we can take their address in an 271 initializer. */ 272 static int print_help; 273 static int print_version; 274 275 /* Pointers to all arguments of --command option. */ 276 struct cmdarg { 277 enum { 278 CMDARG_FILE, 279 CMDARG_COMMAND 280 } type; 281 char *string; 282 } *cmdarg; 283 /* Allocated size of cmdarg. */ 284 int cmdsize; 285 /* Number of elements of cmdarg used. */ 286 int ncmd; 287 288 /* Indices of all arguments of --directory option. */ 289 char **dirarg; 290 /* Allocated size. */ 291 int dirsize; 292 /* Number of elements used. */ 293 int ndir; 294 295 /* gdb init files. */ 296 char *system_gdbinit; 297 char *home_gdbinit; 298 char *local_gdbinit; 299 300 int i; 301 int save_auto_load; 302 struct objfile *objfile; 303 304 struct cleanup *pre_stat_chain; 305 306 #ifdef HAVE_SBRK 307 /* Set this before calling make_command_stats_cleanup. */ 308 lim_at_start = (char *) sbrk (0); 309 #endif 310 311 pre_stat_chain = make_command_stats_cleanup (0); 312 313 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 314 setlocale (LC_MESSAGES, ""); 315 #endif 316 #if defined (HAVE_SETLOCALE) 317 setlocale (LC_CTYPE, ""); 318 #endif 319 bindtextdomain (PACKAGE, LOCALEDIR); 320 textdomain (PACKAGE); 321 322 cmdsize = 1; 323 cmdarg = (struct cmdarg *) xmalloc (cmdsize * sizeof (*cmdarg)); 324 ncmd = 0; 325 dirsize = 1; 326 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); 327 ndir = 0; 328 329 quit_flag = 0; 330 saved_command_line = (char *) xmalloc (saved_command_line_size); 331 saved_command_line[0] = '\0'; 332 instream = stdin; 333 334 gdb_stdout = stdio_fileopen (stdout); 335 gdb_stderr = stdio_fileopen (stderr); 336 gdb_stdlog = gdb_stderr; /* for moment */ 337 gdb_stdtarg = gdb_stderr; /* for moment */ 338 gdb_stdin = stdio_fileopen (stdin); 339 gdb_stdtargerr = gdb_stderr; /* for moment */ 340 gdb_stdtargin = gdb_stdin; /* for moment */ 341 342 gdb_program_name = xstrdup (argv[0]); 343 344 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf))) 345 /* Don't use *_filtered or warning() (which relies on 346 current_target) until after initialize_all_files(). */ 347 fprintf_unfiltered (gdb_stderr, 348 _("%s: warning: error finding " 349 "working directory: %s\n"), 350 argv[0], safe_strerror (errno)); 351 352 current_directory = gdb_dirbuf; 353 354 /* Set the sysroot path. */ 355 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT, 356 TARGET_SYSTEM_ROOT_RELOCATABLE); 357 358 debug_file_directory = relocate_gdb_directory (DEBUGDIR, 359 DEBUGDIR_RELOCATABLE); 360 361 gdb_datadir = relocate_gdb_directory (GDB_DATADIR, 362 GDB_DATADIR_RELOCATABLE); 363 364 #ifdef WITH_PYTHON_PATH 365 { 366 /* For later use in helping Python find itself. */ 367 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL); 368 369 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE); 370 xfree (tmp); 371 } 372 #endif 373 374 #ifdef RELOC_SRCDIR 375 add_substitute_path_rule (RELOC_SRCDIR, 376 make_relative_prefix (argv[0], BINDIR, 377 RELOC_SRCDIR)); 378 #endif 379 380 /* There will always be an interpreter. Either the one passed into 381 this captured main, or one specified by the user at start up, or 382 the console. Initialize the interpreter to the one requested by 383 the application. */ 384 interpreter_p = xstrdup (context->interpreter_p); 385 386 /* Parse arguments and options. */ 387 { 388 int c; 389 /* When var field is 0, use flag field to record the equivalent 390 short option (or arbitrary numbers starting at 10 for those 391 with no equivalent). */ 392 enum { 393 OPT_SE = 10, 394 OPT_CD, 395 OPT_ANNOTATE, 396 OPT_STATISTICS, 397 OPT_TUI, 398 OPT_KGDB, 399 OPT_NOWINDOWS, 400 OPT_WINDOWS 401 }; 402 static struct option long_options[] = 403 { 404 {"tui", no_argument, 0, OPT_TUI}, 405 {"xdb", no_argument, &xdb_commands, 1}, 406 {"dbx", no_argument, &dbx_commands, 1}, 407 {"readnow", no_argument, &readnow_symbol_files, 1}, 408 {"r", no_argument, &readnow_symbol_files, 1}, 409 {"quiet", no_argument, &quiet, 1}, 410 {"q", no_argument, &quiet, 1}, 411 {"silent", no_argument, &quiet, 1}, 412 {"nx", no_argument, &inhibit_gdbinit, 1}, 413 {"n", no_argument, &inhibit_gdbinit, 1}, 414 {"batch-silent", no_argument, 0, 'B'}, 415 {"batch", no_argument, &batch_flag, 1}, 416 {"epoch", no_argument, &epoch_interface, 1}, 417 418 /* This is a synonym for "--annotate=1". --annotate is now 419 preferred, but keep this here for a long time because people 420 will be running emacses which use --fullname. */ 421 {"fullname", no_argument, 0, 'f'}, 422 {"f", no_argument, 0, 'f'}, 423 424 {"kernel", no_argument, 0, OPT_KGDB}, 425 {"annotate", required_argument, 0, OPT_ANNOTATE}, 426 {"help", no_argument, &print_help, 1}, 427 {"se", required_argument, 0, OPT_SE}, 428 {"symbols", required_argument, 0, 's'}, 429 {"s", required_argument, 0, 's'}, 430 {"exec", required_argument, 0, 'e'}, 431 {"e", required_argument, 0, 'e'}, 432 {"core", required_argument, 0, 'c'}, 433 {"c", required_argument, 0, 'c'}, 434 {"pid", required_argument, 0, 'p'}, 435 {"p", required_argument, 0, 'p'}, 436 {"command", required_argument, 0, 'x'}, 437 {"eval-command", required_argument, 0, 'X'}, 438 {"version", no_argument, &print_version, 1}, 439 {"x", required_argument, 0, 'x'}, 440 {"ex", required_argument, 0, 'X'}, 441 #ifdef GDBTK 442 {"tclcommand", required_argument, 0, 'z'}, 443 {"enable-external-editor", no_argument, 0, 'y'}, 444 {"editor-command", required_argument, 0, 'w'}, 445 #endif 446 {"ui", required_argument, 0, 'i'}, 447 {"interpreter", required_argument, 0, 'i'}, 448 {"i", required_argument, 0, 'i'}, 449 {"directory", required_argument, 0, 'd'}, 450 {"d", required_argument, 0, 'd'}, 451 {"data-directory", required_argument, 0, 'D'}, 452 {"cd", required_argument, 0, OPT_CD}, 453 {"tty", required_argument, 0, 't'}, 454 {"baud", required_argument, 0, 'b'}, 455 {"b", required_argument, 0, 'b'}, 456 {"nw", no_argument, NULL, OPT_NOWINDOWS}, 457 {"nowindows", no_argument, NULL, OPT_NOWINDOWS}, 458 {"w", no_argument, NULL, OPT_WINDOWS}, 459 {"windows", no_argument, NULL, OPT_WINDOWS}, 460 {"statistics", no_argument, 0, OPT_STATISTICS}, 461 {"write", no_argument, &write_files, 1}, 462 {"args", no_argument, &set_args, 1}, 463 {"l", required_argument, 0, 'l'}, 464 {"return-child-result", no_argument, &return_child_result, 1}, 465 {0, no_argument, 0, 0} 466 }; 467 468 while (1) 469 { 470 int option_index; 471 472 c = getopt_long_only (argc, argv, "", 473 long_options, &option_index); 474 if (c == EOF || set_args) 475 break; 476 477 /* Long option that takes an argument. */ 478 if (c == 0 && long_options[option_index].flag == 0) 479 c = long_options[option_index].val; 480 481 switch (c) 482 { 483 case 0: 484 /* Long option that just sets a flag. */ 485 break; 486 case OPT_SE: 487 symarg = optarg; 488 execarg = optarg; 489 break; 490 case OPT_CD: 491 cdarg = optarg; 492 break; 493 case OPT_ANNOTATE: 494 /* FIXME: what if the syntax is wrong (e.g. not digits)? */ 495 annotation_level = atoi (optarg); 496 break; 497 case OPT_STATISTICS: 498 /* Enable the display of both time and space usage. */ 499 set_display_time (1); 500 set_display_space (1); 501 break; 502 case OPT_TUI: 503 /* --tui is equivalent to -i=tui. */ 504 #ifdef TUI 505 xfree (interpreter_p); 506 interpreter_p = xstrdup (INTERP_TUI); 507 #else 508 fprintf_unfiltered (gdb_stderr, 509 _("%s: TUI mode is not supported\n"), 510 argv[0]); 511 exit (1); 512 #endif 513 break; 514 case OPT_KGDB: 515 kernel_debugger = 1; 516 break; 517 case OPT_WINDOWS: 518 /* FIXME: cagney/2003-03-01: Not sure if this option is 519 actually useful, and if it is, what it should do. */ 520 #ifdef GDBTK 521 /* --windows is equivalent to -i=insight. */ 522 xfree (interpreter_p); 523 interpreter_p = xstrdup (INTERP_INSIGHT); 524 #endif 525 use_windows = 1; 526 break; 527 case OPT_NOWINDOWS: 528 /* -nw is equivalent to -i=console. */ 529 xfree (interpreter_p); 530 interpreter_p = xstrdup (INTERP_CONSOLE); 531 use_windows = 0; 532 break; 533 case 'f': 534 annotation_level = 1; 535 /* We have probably been invoked from emacs. Disable 536 window interface. */ 537 use_windows = 0; 538 break; 539 case 's': 540 symarg = optarg; 541 break; 542 case 'e': 543 execarg = optarg; 544 break; 545 case 'c': 546 corearg = optarg; 547 break; 548 case 'p': 549 pidarg = optarg; 550 break; 551 case 'x': 552 cmdarg[ncmd].type = CMDARG_FILE; 553 cmdarg[ncmd++].string = optarg; 554 if (ncmd >= cmdsize) 555 { 556 cmdsize *= 2; 557 cmdarg = xrealloc ((char *) cmdarg, 558 cmdsize * sizeof (*cmdarg)); 559 } 560 break; 561 case 'X': 562 cmdarg[ncmd].type = CMDARG_COMMAND; 563 cmdarg[ncmd++].string = optarg; 564 if (ncmd >= cmdsize) 565 { 566 cmdsize *= 2; 567 cmdarg = xrealloc ((char *) cmdarg, 568 cmdsize * sizeof (*cmdarg)); 569 } 570 break; 571 case 'B': 572 batch_flag = batch_silent = 1; 573 gdb_stdout = ui_file_new(); 574 break; 575 case 'D': 576 xfree (gdb_datadir); 577 gdb_datadir = xstrdup (optarg); 578 break; 579 #ifdef GDBTK 580 case 'z': 581 { 582 extern int gdbtk_test (char *); 583 584 if (!gdbtk_test (optarg)) 585 { 586 fprintf_unfiltered (gdb_stderr, 587 _("%s: unable to load " 588 "tclcommand file \"%s\""), 589 argv[0], optarg); 590 exit (1); 591 } 592 break; 593 } 594 case 'y': 595 /* Backwards compatibility only. */ 596 break; 597 case 'w': 598 { 599 external_editor_command = xstrdup (optarg); 600 break; 601 } 602 #endif /* GDBTK */ 603 case 'i': 604 xfree (interpreter_p); 605 interpreter_p = xstrdup (optarg); 606 break; 607 case 'd': 608 dirarg[ndir++] = optarg; 609 if (ndir >= dirsize) 610 { 611 dirsize *= 2; 612 dirarg = (char **) xrealloc ((char *) dirarg, 613 dirsize * sizeof (*dirarg)); 614 } 615 break; 616 case 't': 617 ttyarg = optarg; 618 break; 619 case 'q': 620 quiet = 1; 621 break; 622 case 'b': 623 { 624 int i; 625 char *p; 626 627 i = strtol (optarg, &p, 0); 628 if (i == 0 && p == optarg) 629 630 /* Don't use *_filtered or warning() (which relies on 631 current_target) until after initialize_all_files(). */ 632 633 fprintf_unfiltered 634 (gdb_stderr, 635 _("warning: could not set baud rate to `%s'.\n"), optarg); 636 else 637 baud_rate = i; 638 } 639 break; 640 case 'l': 641 { 642 int i; 643 char *p; 644 645 i = strtol (optarg, &p, 0); 646 if (i == 0 && p == optarg) 647 648 /* Don't use *_filtered or warning() (which relies on 649 current_target) until after initialize_all_files(). */ 650 651 fprintf_unfiltered (gdb_stderr, 652 _("warning: could not set " 653 "timeout limit to `%s'.\n"), optarg); 654 else 655 remote_timeout = i; 656 } 657 break; 658 659 case '?': 660 fprintf_unfiltered (gdb_stderr, 661 _("Use `%s --help' for a " 662 "complete list of options.\n"), 663 argv[0]); 664 exit (1); 665 } 666 } 667 668 /* If --help or --version, disable window interface. */ 669 if (print_help || print_version) 670 { 671 use_windows = 0; 672 } 673 674 if (batch_flag) 675 quiet = 1; 676 } 677 678 /* Initialize all files. Give the interpreter a chance to take 679 control of the console via the deprecated_init_ui_hook (). */ 680 gdb_init (argv[0]); 681 682 /* Now that gdb_init has created the initial inferior, we're in 683 position to set args for that inferior. */ 684 if (set_args) 685 { 686 /* The remaining options are the command-line options for the 687 inferior. The first one is the sym/exec file, and the rest 688 are arguments. */ 689 if (optind >= argc) 690 { 691 fprintf_unfiltered (gdb_stderr, 692 _("%s: `--args' specified but " 693 "no program specified\n"), 694 argv[0]); 695 exit (1); 696 } 697 symarg = argv[optind]; 698 execarg = argv[optind]; 699 ++optind; 700 set_inferior_args_vector (argc - optind, &argv[optind]); 701 } 702 else 703 { 704 /* OK, that's all the options. */ 705 706 /* The first argument, if specified, is the name of the 707 executable. */ 708 if (optind < argc) 709 { 710 symarg = argv[optind]; 711 execarg = argv[optind]; 712 optind++; 713 } 714 715 /* If the user hasn't already specified a PID or the name of a 716 core file, then a second optional argument is allowed. If 717 present, this argument should be interpreted as either a 718 PID or a core file, whichever works. */ 719 if (pidarg == NULL && corearg == NULL && optind < argc) 720 { 721 pid_or_core_arg = argv[optind]; 722 optind++; 723 } 724 725 /* Any argument left on the command line is unexpected and 726 will be ignored. Inform the user. */ 727 if (optind < argc) 728 fprintf_unfiltered (gdb_stderr, 729 _("Excess command line " 730 "arguments ignored. (%s%s)\n"), 731 argv[optind], 732 (optind == argc - 1) ? "" : " ..."); 733 } 734 735 /* Lookup gdbinit files. Note that the gdbinit file name may be 736 overriden during file initialization, so get_init_files should be 737 called after gdb_init. */ 738 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit); 739 740 /* Do these (and anything which might call wrap_here or *_filtered) 741 after initialize_all_files() but before the interpreter has been 742 installed. Otherwize the help/version messages will be eaten by 743 the interpreter's output handler. */ 744 745 if (print_version) 746 { 747 print_gdb_version (gdb_stdout); 748 wrap_here (""); 749 printf_filtered ("\n"); 750 exit (0); 751 } 752 753 if (print_help) 754 { 755 print_gdb_help (gdb_stdout); 756 fputs_unfiltered ("\n", gdb_stdout); 757 exit (0); 758 } 759 760 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets 761 GDB retain the old MI1 interpreter startup behavior. Output the 762 copyright message before the interpreter is installed. That way 763 it isn't encapsulated in MI output. */ 764 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0) 765 { 766 /* Print all the junk at the top, with trailing "..." if we are 767 about to read a symbol file (possibly slowly). */ 768 print_gdb_version (gdb_stdout); 769 if (symarg) 770 printf_filtered (".."); 771 wrap_here (""); 772 printf_filtered ("\n"); 773 gdb_flush (gdb_stdout); /* Force to screen during slow 774 operations. */ 775 } 776 777 /* Install the default UI. All the interpreters should have had a 778 look at things by now. Initialize the default interpreter. */ 779 780 { 781 /* Find it. */ 782 struct interp *interp = interp_lookup (interpreter_p); 783 784 if (interp == NULL) 785 error (_("Interpreter `%s' unrecognized"), interpreter_p); 786 /* Install it. */ 787 if (!interp_set (interp, 1)) 788 { 789 fprintf_unfiltered (gdb_stderr, 790 "Interpreter `%s' failed to initialize.\n", 791 interpreter_p); 792 exit (1); 793 } 794 } 795 796 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets 797 GDB retain the old MI1 interpreter startup behavior. Output the 798 copyright message after the interpreter is installed when it is 799 any sane interpreter. */ 800 if (!quiet && !current_interp_named_p (INTERP_MI1)) 801 { 802 /* Print all the junk at the top, with trailing "..." if we are 803 about to read a symbol file (possibly slowly). */ 804 print_gdb_version (gdb_stdout); 805 if (symarg) 806 printf_filtered (".."); 807 wrap_here (""); 808 printf_filtered ("\n"); 809 gdb_flush (gdb_stdout); /* Force to screen during slow 810 operations. */ 811 } 812 813 /* Set off error and warning messages with a blank line. */ 814 error_pre_print = "\n"; 815 quit_pre_print = error_pre_print; 816 warning_pre_print = _("\nwarning: "); 817 818 /* Read and execute the system-wide gdbinit file, if it exists. 819 This is done *before* all the command line arguments are 820 processed; it sets global parameters, which are independent of 821 what file you are debugging or what directory you are in. */ 822 if (system_gdbinit && !inhibit_gdbinit) 823 catch_command_errors (source_script, system_gdbinit, 0, RETURN_MASK_ALL); 824 825 /* Read and execute $HOME/.gdbinit file, if it exists. This is done 826 *before* all the command line arguments are processed; it sets 827 global parameters, which are independent of what file you are 828 debugging or what directory you are in. */ 829 830 if (home_gdbinit && !inhibit_gdbinit) 831 catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL); 832 833 /* Now perform all the actions indicated by the arguments. */ 834 if (cdarg != NULL) 835 { 836 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL); 837 } 838 839 for (i = 0; i < ndir; i++) 840 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL); 841 xfree (dirarg); 842 843 /* Skip auto-loading section-specified scripts until we've sourced 844 local_gdbinit (which is often used to augment the source search 845 path). */ 846 save_auto_load = gdbpy_global_auto_load; 847 gdbpy_global_auto_load = 0; 848 849 if (execarg != NULL 850 && symarg != NULL 851 && strcmp (execarg, symarg) == 0) 852 { 853 /* The exec file and the symbol-file are the same. If we can't 854 open it, better only print one error message. 855 catch_command_errors returns non-zero on success! */ 856 if (catch_command_errors (exec_file_attach, execarg, 857 !batch_flag, RETURN_MASK_ALL)) 858 catch_command_errors (symbol_file_add_main, symarg, 859 !batch_flag, RETURN_MASK_ALL); 860 } 861 else 862 { 863 if (execarg != NULL) 864 catch_command_errors (exec_file_attach, execarg, 865 !batch_flag, RETURN_MASK_ALL); 866 if (symarg != NULL) 867 catch_command_errors (symbol_file_add_main, symarg, 868 !batch_flag, RETURN_MASK_ALL); 869 } 870 871 if (corearg && pidarg) 872 error (_("Can't attach to process and specify " 873 "a core file at the same time.")); 874 875 if (corearg != NULL) 876 catch_command_errors (core_file_command, corearg, 877 !batch_flag, RETURN_MASK_ALL); 878 else if (pidarg != NULL) 879 catch_command_errors (attach_command, pidarg, 880 !batch_flag, RETURN_MASK_ALL); 881 else if (pid_or_core_arg) 882 { 883 /* The user specified 'gdb program pid' or gdb program core'. 884 If pid_or_core_arg's first character is a digit, try attach 885 first and then corefile. Otherwise try just corefile. */ 886 887 if (isdigit (pid_or_core_arg[0])) 888 { 889 if (catch_command_errors (attach_command, pid_or_core_arg, 890 !batch_flag, RETURN_MASK_ALL) == 0) 891 catch_command_errors (core_file_command, pid_or_core_arg, 892 !batch_flag, RETURN_MASK_ALL); 893 } 894 else /* Can't be a pid, better be a corefile. */ 895 catch_command_errors (core_file_command, pid_or_core_arg, 896 !batch_flag, RETURN_MASK_ALL); 897 } 898 899 if (ttyarg != NULL) 900 set_inferior_io_terminal (ttyarg); 901 902 /* Error messages should no longer be distinguished with extra output. */ 903 error_pre_print = NULL; 904 quit_pre_print = NULL; 905 warning_pre_print = _("warning: "); 906 907 /* Read the .gdbinit file in the current directory, *if* it isn't 908 the same as the $HOME/.gdbinit file (it should exist, also). */ 909 if (local_gdbinit && !inhibit_gdbinit) 910 catch_command_errors (source_script, local_gdbinit, 0, RETURN_MASK_ALL); 911 912 /* Now that all .gdbinit's have been read and all -d options have been 913 processed, we can read any scripts mentioned in SYMARG. 914 We wait until now because it is common to add to the source search 915 path in local_gdbinit. */ 916 gdbpy_global_auto_load = save_auto_load; 917 ALL_OBJFILES (objfile) 918 load_auto_scripts_for_objfile (objfile); 919 920 for (i = 0; i < ncmd; i++) 921 { 922 if (cmdarg[i].type == CMDARG_FILE) 923 catch_command_errors (source_script, cmdarg[i].string, 924 !batch_flag, RETURN_MASK_ALL); 925 else /* cmdarg[i].type == CMDARG_COMMAND */ 926 catch_command_errors (execute_command, cmdarg[i].string, 927 !batch_flag, RETURN_MASK_ALL); 928 } 929 xfree (cmdarg); 930 931 /* Read in the old history after all the command files have been 932 read. */ 933 init_history (); 934 935 if (batch_flag) 936 { 937 /* We have hit the end of the batch file. */ 938 quit_force (NULL, 0); 939 } 940 941 /* Show time and/or space usage. */ 942 do_cleanups (pre_stat_chain); 943 944 /* NOTE: cagney/1999-11-07: There is probably no reason for not 945 moving this loop and the code found in captured_command_loop() 946 into the command_loop() proper. The main thing holding back that 947 change - SET_TOP_LEVEL() - has been eliminated. */ 948 while (1) 949 { 950 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL); 951 } 952 /* No exit -- exit is through quit_command. */ 953 } 954 955 int 956 gdb_main (struct captured_main_args *args) 957 { 958 kernel_debugger = 0; 959 use_windows = args->use_windows; 960 catch_errors (captured_main, args, "", RETURN_MASK_ALL); 961 /* The only way to end up here is by an error (normal exit is 962 handled by quit_force()), hence always return an error status. */ 963 return 1; 964 } 965 966 967 /* Don't use *_filtered for printing help. We don't want to prompt 968 for continue no matter how small the screen or how much we're going 969 to print. */ 970 971 static void 972 print_gdb_help (struct ui_file *stream) 973 { 974 char *system_gdbinit; 975 char *home_gdbinit; 976 char *local_gdbinit; 977 978 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit); 979 980 fputs_unfiltered (_("\ 981 This is the GNU debugger. Usage:\n\n\ 982 gdb [options] [executable-file [core-file or process-id]]\n\ 983 gdb [options] --args executable-file [inferior-arguments ...]\n\n\ 984 Options:\n\n\ 985 "), stream); 986 fputs_unfiltered (_("\ 987 --args Arguments after executable-file are passed to inferior\n\ 988 "), stream); 989 fputs_unfiltered (_("\ 990 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\ 991 --batch Exit after processing options.\n\ 992 --batch-silent As for --batch, but suppress all gdb stdout output.\n\ 993 --return-child-result\n\ 994 GDB exit code will be the child's exit code.\n\ 995 --cd=DIR Change current directory to DIR.\n\ 996 --command=FILE, -x Execute GDB commands from FILE.\n\ 997 --eval-command=COMMAND, -ex\n\ 998 Execute a single GDB command.\n\ 999 May be used multiple times and in conjunction\n\ 1000 with --command.\n\ 1001 --core=COREFILE Analyze the core dump COREFILE.\n\ 1002 --pid=PID Attach to running process PID.\n\ 1003 "), stream); 1004 fputs_unfiltered (_("\ 1005 --dbx DBX compatibility mode.\n\ 1006 --directory=DIR Search for source files in DIR.\n\ 1007 --epoch Output information used by epoch emacs-GDB interface.\n\ 1008 --exec=EXECFILE Use EXECFILE as the executable.\n\ 1009 --fullname Output information used by emacs-GDB interface.\n\ 1010 --help Print this message.\n\ 1011 "), stream); 1012 fputs_unfiltered (_("\ 1013 --interpreter=INTERP\n\ 1014 Select a specific interpreter / user interface\n\ 1015 "), stream); 1016 fputs_unfiltered (_("\ 1017 -l TIMEOUT Set timeout in seconds for remote debugging.\n\ 1018 --nw Do not use a window interface.\n\ 1019 --nx Do not read "), stream); 1020 fputs_unfiltered (gdbinit, stream); 1021 fputs_unfiltered (_(" file.\n\ 1022 --quiet Do not print version number on startup.\n\ 1023 --readnow Fully read symbol files on first access.\n\ 1024 "), stream); 1025 fputs_unfiltered (_("\ 1026 --se=FILE Use FILE as symbol file and executable file.\n\ 1027 --symbols=SYMFILE Read symbols from SYMFILE.\n\ 1028 --tty=TTY Use TTY for input/output by the program being debugged.\n\ 1029 "), stream); 1030 #if defined(TUI) 1031 fputs_unfiltered (_("\ 1032 --tui Use a terminal user interface.\n\ 1033 "), stream); 1034 #endif 1035 fputs_unfiltered (_("\ 1036 --version Print version information and then exit.\n\ 1037 -w Use a window interface.\n\ 1038 --write Set writing into executable and core files.\n\ 1039 --xdb XDB compatibility mode.\n\ 1040 "), stream); 1041 fputs_unfiltered (_("\n\ 1042 At startup, GDB reads the following init files and executes their commands:\n\ 1043 "), stream); 1044 if (system_gdbinit) 1045 fprintf_unfiltered (stream, _("\ 1046 * system-wide init file: %s\n\ 1047 "), system_gdbinit); 1048 if (home_gdbinit) 1049 fprintf_unfiltered (stream, _("\ 1050 * user-specific init file: %s\n\ 1051 "), home_gdbinit); 1052 if (local_gdbinit) 1053 fprintf_unfiltered (stream, _("\ 1054 * local init file: ./%s\n\ 1055 "), local_gdbinit); 1056 fputs_unfiltered (_("\n\ 1057 For more information, type \"help\" from within GDB, or consult the\n\ 1058 GDB manual (available as on-line info or a printed manual).\n\ 1059 "), stream); 1060 if (REPORT_BUGS_TO[0] && stream == gdb_stdout) 1061 fprintf_unfiltered (stream, _("\ 1062 Report bugs to \"%s\".\n\ 1063 "), REPORT_BUGS_TO); 1064 } 1065