1/* Top level stuff for GDB, the GNU debugger. 2 3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software 5 Foundation, Inc. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 59 Temple Place - Suite 330, 22 Boston, MA 02111-1307, USA. */ 23 24#include "defs.h" 25#include "top.h" 26#include "target.h" 27#include "inferior.h" 28#include "symfile.h" 29#include "gdbcore.h" 30 31#include "getopt.h" 32 33#include <sys/types.h> 34#include "gdb_stat.h" 35#include <ctype.h> 36 37#include "gdb_string.h" 38#include "event-loop.h" 39#include "ui-out.h" 40 41#include "interps.h" 42#include "main.h" 43 44/* If nonzero, display time usage both at startup and for each command. */ 45 46int display_time; 47 48/* If nonzero, display space usage both at startup and for each command. */ 49 50int display_space; 51 52/* Whether this is the async version or not. The async version is 53 invoked on the command line with the -nw --async options. In this 54 version, the usual command_loop is substituted by and event loop which 55 processes UI events asynchronously. */ 56int event_loop_p = 1; 57 58/* The selected interpreter. This will be used as a set command 59 variable, so it should always be malloc'ed - since 60 do_setshow_command will free it. */ 61char *interpreter_p; 62 63/* Whether xdb commands will be handled */ 64int xdb_commands = 0; 65 66/* Whether dbx commands will be handled */ 67int dbx_commands = 0; 68 69/* System root path, used to find libraries etc. */ 70char *gdb_sysroot = 0; 71 72struct ui_file *gdb_stdout; 73struct ui_file *gdb_stderr; 74struct ui_file *gdb_stdlog; 75struct ui_file *gdb_stdin; 76/* target IO streams */ 77struct ui_file *gdb_stdtargin; 78struct ui_file *gdb_stdtarg; 79struct ui_file *gdb_stdtargerr; 80 81/* Whether to enable writing into executable and core files */ 82extern int write_files; 83 84static void print_gdb_help (struct ui_file *); 85 86/* These two are used to set the external editor commands when gdb is farming 87 out files to be edited by another program. */ 88 89extern char *external_editor_command; 90 91/* Call command_loop. If it happens to return, pass that through as a 92 non-zero return status. */ 93 94static int 95captured_command_loop (void *data) 96{ 97 current_interp_command_loop (); 98 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton 99 would clean things up (restoring the cleanup chain) to the state 100 they were just prior to the call. Technically, this means that 101 the do_cleanups() below is redundant. Unfortunately, many FUNCs 102 are not that well behaved. do_cleanups should either be replaced 103 with a do_cleanups call (to cover the problem) or an assertion 104 check to detect bad FUNCs code. */ 105 do_cleanups (ALL_CLEANUPS); 106 /* If the command_loop returned, normally (rather than threw an 107 error) we try to quit. If the quit is aborted, catch_errors() 108 which called this catch the signal and restart the command 109 loop. */ 110 quit_command (NULL, instream == stdin); 111 return 1; 112} 113 114static int 115captured_main (void *data) 116{ 117 struct captured_main_args *context = data; 118 int argc = context->argc; 119 char **argv = context->argv; 120 int count; 121 static int quiet = 0; 122 static int batch = 0; 123 static int set_args = 0; 124 125 /* Pointers to various arguments from command line. */ 126 char *symarg = NULL; 127 char *execarg = NULL; 128 char *corearg = NULL; 129 char *cdarg = NULL; 130 char *ttyarg = NULL; 131 132 /* These are static so that we can take their address in an initializer. */ 133 static int print_help; 134 static int print_version; 135 136 /* Pointers to all arguments of --command option. */ 137 char **cmdarg; 138 /* Allocated size of cmdarg. */ 139 int cmdsize; 140 /* Number of elements of cmdarg used. */ 141 int ncmd; 142 143 /* Indices of all arguments of --directory option. */ 144 char **dirarg; 145 /* Allocated size. */ 146 int dirsize; 147 /* Number of elements used. */ 148 int ndir; 149 150 struct stat homebuf, cwdbuf; 151 char *homedir, *homeinit; 152 153 int i; 154 155 long time_at_startup = get_run_time (); 156 157#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 158 setlocale (LC_MESSAGES, ""); 159#endif 160#if defined (HAVE_SETLOCALE) 161 setlocale (LC_CTYPE, ""); 162#endif 163 bindtextdomain (PACKAGE, LOCALEDIR); 164 textdomain (PACKAGE); 165 166 /* This needs to happen before the first use of malloc. */ 167 init_malloc (NULL); 168 169#ifdef HAVE_SBRK 170 lim_at_start = (char *) sbrk (0); 171#endif 172 173#if defined (ALIGN_STACK_ON_STARTUP) 174 i = (int) &count & 0x3; 175 if (i != 0) 176 alloca (4 - i); 177#endif 178 179 cmdsize = 1; 180 cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg)); 181 ncmd = 0; 182 dirsize = 1; 183 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); 184 ndir = 0; 185 186 quit_flag = 0; 187 line = (char *) xmalloc (linesize); 188 line[0] = '\0'; /* Terminate saved (now empty) cmd line */ 189 instream = stdin; 190 191 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); 192 current_directory = gdb_dirbuf; 193 194 gdb_stdout = stdio_fileopen (stdout); 195 gdb_stderr = stdio_fileopen (stderr); 196 gdb_stdlog = gdb_stderr; /* for moment */ 197 gdb_stdtarg = gdb_stderr; /* for moment */ 198 gdb_stdin = stdio_fileopen (stdin); 199 gdb_stdtargerr = gdb_stderr; /* for moment */ 200 gdb_stdtargin = gdb_stdin; /* for moment */ 201 202 /* initialize error() */ 203 error_init (); 204 205 /* Set the sysroot path. */ 206#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE 207 gdb_sysroot = make_relative_prefix (argv[0], BINDIR, TARGET_SYSTEM_ROOT); 208 if (gdb_sysroot) 209 { 210 struct stat s; 211 int res = 0; 212 213 if (stat (gdb_sysroot, &s) == 0) 214 if (S_ISDIR (s.st_mode)) 215 res = 1; 216 217 if (res == 0) 218 { 219 xfree (gdb_sysroot); 220 gdb_sysroot = TARGET_SYSTEM_ROOT; 221 } 222 } 223 else 224 gdb_sysroot = TARGET_SYSTEM_ROOT; 225#else 226#if defined (TARGET_SYSTEM_ROOT) 227 gdb_sysroot = TARGET_SYSTEM_ROOT; 228#else 229 gdb_sysroot = ""; 230#endif 231#endif 232 233 /* There will always be an interpreter. Either the one passed into 234 this captured main, or one specified by the user at start up, or 235 the console. Initialize the interpreter to the one requested by 236 the application. */ 237 interpreter_p = xstrdup (context->interpreter_p); 238 239 /* Parse arguments and options. */ 240 { 241 int c; 242 /* When var field is 0, use flag field to record the equivalent 243 short option (or arbitrary numbers starting at 10 for those 244 with no equivalent). */ 245 enum { 246 OPT_SE = 10, 247 OPT_CD, 248 OPT_ANNOTATE, 249 OPT_STATISTICS, 250 OPT_TUI, 251 OPT_NOWINDOWS, 252 OPT_WINDOWS 253 }; 254 static struct option long_options[] = 255 { 256 {"async", no_argument, &event_loop_p, 1}, 257 {"noasync", no_argument, &event_loop_p, 0}, 258#if defined(TUI) 259 {"tui", no_argument, 0, OPT_TUI}, 260#endif 261 {"xdb", no_argument, &xdb_commands, 1}, 262 {"dbx", no_argument, &dbx_commands, 1}, 263 {"readnow", no_argument, &readnow_symbol_files, 1}, 264 {"r", no_argument, &readnow_symbol_files, 1}, 265 {"quiet", no_argument, &quiet, 1}, 266 {"q", no_argument, &quiet, 1}, 267 {"silent", no_argument, &quiet, 1}, 268 {"nx", no_argument, &inhibit_gdbinit, 1}, 269 {"n", no_argument, &inhibit_gdbinit, 1}, 270 {"batch", no_argument, &batch, 1}, 271 {"epoch", no_argument, &epoch_interface, 1}, 272 273 /* This is a synonym for "--annotate=1". --annotate is now preferred, 274 but keep this here for a long time because people will be running 275 emacses which use --fullname. */ 276 {"fullname", no_argument, 0, 'f'}, 277 {"f", no_argument, 0, 'f'}, 278 279 {"annotate", required_argument, 0, OPT_ANNOTATE}, 280 {"help", no_argument, &print_help, 1}, 281 {"se", required_argument, 0, OPT_SE}, 282 {"symbols", required_argument, 0, 's'}, 283 {"s", required_argument, 0, 's'}, 284 {"exec", required_argument, 0, 'e'}, 285 {"e", required_argument, 0, 'e'}, 286 {"core", required_argument, 0, 'c'}, 287 {"c", required_argument, 0, 'c'}, 288 {"pid", required_argument, 0, 'p'}, 289 {"p", required_argument, 0, 'p'}, 290 {"command", required_argument, 0, 'x'}, 291 {"version", no_argument, &print_version, 1}, 292 {"x", required_argument, 0, 'x'}, 293#ifdef GDBTK 294 {"tclcommand", required_argument, 0, 'z'}, 295 {"enable-external-editor", no_argument, 0, 'y'}, 296 {"editor-command", required_argument, 0, 'w'}, 297#endif 298 {"ui", required_argument, 0, 'i'}, 299 {"interpreter", required_argument, 0, 'i'}, 300 {"i", required_argument, 0, 'i'}, 301 {"directory", required_argument, 0, 'd'}, 302 {"d", required_argument, 0, 'd'}, 303 {"cd", required_argument, 0, OPT_CD}, 304 {"tty", required_argument, 0, 't'}, 305 {"baud", required_argument, 0, 'b'}, 306 {"b", required_argument, 0, 'b'}, 307 {"nw", no_argument, NULL, OPT_NOWINDOWS}, 308 {"nowindows", no_argument, NULL, OPT_NOWINDOWS}, 309 {"w", no_argument, NULL, OPT_WINDOWS}, 310 {"windows", no_argument, NULL, OPT_WINDOWS}, 311 {"statistics", no_argument, 0, OPT_STATISTICS}, 312 {"write", no_argument, &write_files, 1}, 313 {"args", no_argument, &set_args, 1}, 314 {0, no_argument, 0, 0} 315 }; 316 317 while (1) 318 { 319 int option_index; 320 321 c = getopt_long_only (argc, argv, "", 322 long_options, &option_index); 323 if (c == EOF || set_args) 324 break; 325 326 /* Long option that takes an argument. */ 327 if (c == 0 && long_options[option_index].flag == 0) 328 c = long_options[option_index].val; 329 330 switch (c) 331 { 332 case 0: 333 /* Long option that just sets a flag. */ 334 break; 335 case OPT_SE: 336 symarg = optarg; 337 execarg = optarg; 338 break; 339 case OPT_CD: 340 cdarg = optarg; 341 break; 342 case OPT_ANNOTATE: 343 /* FIXME: what if the syntax is wrong (e.g. not digits)? */ 344 annotation_level = atoi (optarg); 345 break; 346 case OPT_STATISTICS: 347 /* Enable the display of both time and space usage. */ 348 display_time = 1; 349 display_space = 1; 350 break; 351 case OPT_TUI: 352 /* --tui is equivalent to -i=tui. */ 353 xfree (interpreter_p); 354 interpreter_p = xstrdup ("tui"); 355 break; 356 case OPT_WINDOWS: 357 /* FIXME: cagney/2003-03-01: Not sure if this option is 358 actually useful, and if it is, what it should do. */ 359 use_windows = 1; 360 break; 361 case OPT_NOWINDOWS: 362 /* -nw is equivalent to -i=console. */ 363 xfree (interpreter_p); 364 interpreter_p = xstrdup (INTERP_CONSOLE); 365 use_windows = 0; 366 break; 367 case 'f': 368 annotation_level = 1; 369/* We have probably been invoked from emacs. Disable window interface. */ 370 use_windows = 0; 371 break; 372 case 's': 373 symarg = optarg; 374 break; 375 case 'e': 376 execarg = optarg; 377 break; 378 case 'c': 379 corearg = optarg; 380 break; 381 case 'p': 382 /* "corearg" is shared by "--core" and "--pid" */ 383 corearg = optarg; 384 break; 385 case 'x': 386 cmdarg[ncmd++] = optarg; 387 if (ncmd >= cmdsize) 388 { 389 cmdsize *= 2; 390 cmdarg = (char **) xrealloc ((char *) cmdarg, 391 cmdsize * sizeof (*cmdarg)); 392 } 393 break; 394#ifdef GDBTK 395 case 'z': 396 { 397extern int gdbtk_test (char *); 398 if (!gdbtk_test (optarg)) 399 { 400 fprintf_unfiltered (gdb_stderr, _("%s: unable to load tclcommand file \"%s\""), 401 argv[0], optarg); 402 exit (1); 403 } 404 break; 405 } 406 case 'y': 407 /* Backwards compatibility only. */ 408 break; 409 case 'w': 410 { 411 external_editor_command = xstrdup (optarg); 412 break; 413 } 414#endif /* GDBTK */ 415 case 'i': 416 xfree (interpreter_p); 417 interpreter_p = xstrdup (optarg); 418 break; 419 case 'd': 420 dirarg[ndir++] = optarg; 421 if (ndir >= dirsize) 422 { 423 dirsize *= 2; 424 dirarg = (char **) xrealloc ((char *) dirarg, 425 dirsize * sizeof (*dirarg)); 426 } 427 break; 428 case 't': 429 ttyarg = optarg; 430 break; 431 case 'q': 432 quiet = 1; 433 break; 434 case 'b': 435 { 436 int i; 437 char *p; 438 439 i = strtol (optarg, &p, 0); 440 if (i == 0 && p == optarg) 441 442 /* Don't use *_filtered or warning() (which relies on 443 current_target) until after initialize_all_files(). */ 444 445 fprintf_unfiltered 446 (gdb_stderr, 447 _("warning: could not set baud rate to `%s'.\n"), optarg); 448 else 449 baud_rate = i; 450 } 451 break; 452 case 'l': 453 { 454 int i; 455 char *p; 456 457 i = strtol (optarg, &p, 0); 458 if (i == 0 && p == optarg) 459 460 /* Don't use *_filtered or warning() (which relies on 461 current_target) until after initialize_all_files(). */ 462 463 fprintf_unfiltered 464 (gdb_stderr, 465 _("warning: could not set timeout limit to `%s'.\n"), optarg); 466 else 467 remote_timeout = i; 468 } 469 break; 470 471 case '?': 472 fprintf_unfiltered (gdb_stderr, 473 _("Use `%s --help' for a complete list of options.\n"), 474 argv[0]); 475 exit (1); 476 } 477 } 478 479 /* If --help or --version, disable window interface. */ 480 if (print_help || print_version) 481 { 482 use_windows = 0; 483 } 484 485 if (set_args) 486 { 487 /* The remaining options are the command-line options for the 488 inferior. The first one is the sym/exec file, and the rest 489 are arguments. */ 490 if (optind >= argc) 491 { 492 fprintf_unfiltered (gdb_stderr, 493 _("%s: `--args' specified but no program specified\n"), 494 argv[0]); 495 exit (1); 496 } 497 symarg = argv[optind]; 498 execarg = argv[optind]; 499 ++optind; 500 set_inferior_args_vector (argc - optind, &argv[optind]); 501 } 502 else 503 { 504 /* OK, that's all the options. The other arguments are filenames. */ 505 count = 0; 506 for (; optind < argc; optind++) 507 switch (++count) 508 { 509 case 1: 510 symarg = argv[optind]; 511 execarg = argv[optind]; 512 break; 513 case 2: 514 /* The documentation says this can be a "ProcID" as well. 515 We will try it as both a corefile and a pid. */ 516 corearg = argv[optind]; 517 break; 518 case 3: 519 fprintf_unfiltered (gdb_stderr, 520 _("Excess command line arguments ignored. (%s%s)\n"), 521 argv[optind], (optind == argc - 1) ? "" : " ..."); 522 break; 523 } 524 } 525 if (batch) 526 quiet = 1; 527 } 528 529 /* Initialize all files. Give the interpreter a chance to take 530 control of the console via the init_ui_hook()) */ 531 gdb_init (argv[0]); 532 533 /* Do these (and anything which might call wrap_here or *_filtered) 534 after initialize_all_files() but before the interpreter has been 535 installed. Otherwize the help/version messages will be eaten by 536 the interpreter's output handler. */ 537 538 if (print_version) 539 { 540 print_gdb_version (gdb_stdout); 541 wrap_here (""); 542 printf_filtered ("\n"); 543 exit (0); 544 } 545 546 if (print_help) 547 { 548 print_gdb_help (gdb_stdout); 549 fputs_unfiltered ("\n", gdb_stdout); 550 exit (0); 551 } 552 553 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets 554 GDB retain the old MI1 interpreter startup behavior. Output the 555 copyright message before the interpreter is installed. That way 556 it isn't encapsulated in MI output. */ 557 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0) 558 { 559 /* Print all the junk at the top, with trailing "..." if we are about 560 to read a symbol file (possibly slowly). */ 561 print_gdb_version (gdb_stdout); 562 if (symarg) 563 printf_filtered (".."); 564 wrap_here (""); 565 gdb_flush (gdb_stdout); /* Force to screen during slow operations */ 566 } 567 568 569 /* Install the default UI. All the interpreters should have had a 570 look at things by now. Initialize the default interpreter. */ 571 572 { 573 /* Find it. */ 574 struct interp *interp = interp_lookup (interpreter_p); 575 if (interp == NULL) 576 error ("Interpreter `%s' unrecognized", interpreter_p); 577 /* Install it. */ 578 if (!interp_set (interp)) 579 { 580 fprintf_unfiltered (gdb_stderr, 581 "Interpreter `%s' failed to initialize.\n", 582 interpreter_p); 583 exit (1); 584 } 585 } 586 587 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets 588 GDB retain the old MI1 interpreter startup behavior. Output the 589 copyright message after the interpreter is installed when it is 590 any sane interpreter. */ 591 if (!quiet && !current_interp_named_p (INTERP_MI1)) 592 { 593 /* Print all the junk at the top, with trailing "..." if we are about 594 to read a symbol file (possibly slowly). */ 595 print_gdb_version (gdb_stdout); 596 if (symarg) 597 printf_filtered (".."); 598 wrap_here (""); 599 gdb_flush (gdb_stdout); /* Force to screen during slow operations */ 600 } 601 602 error_pre_print = "\n\n"; 603 quit_pre_print = error_pre_print; 604 605 /* We may get more than one warning, don't double space all of them... */ 606 warning_pre_print = _("\nwarning: "); 607 608 /* Read and execute $HOME/.gdbinit file, if it exists. This is done 609 *before* all the command line arguments are processed; it sets 610 global parameters, which are independent of what file you are 611 debugging or what directory you are in. */ 612 homedir = getenv ("HOME"); 613 if (homedir) 614 { 615 homeinit = (char *) alloca (strlen (homedir) + 616 strlen (gdbinit) + 10); 617 strcpy (homeinit, homedir); 618 strcat (homeinit, "/"); 619 strcat (homeinit, gdbinit); 620 621 if (!inhibit_gdbinit) 622 { 623 catch_command_errors (source_command, homeinit, 0, RETURN_MASK_ALL); 624 } 625 626 /* Do stats; no need to do them elsewhere since we'll only 627 need them if homedir is set. Make sure that they are 628 zero in case one of them fails (this guarantees that they 629 won't match if either exists). */ 630 631 memset (&homebuf, 0, sizeof (struct stat)); 632 memset (&cwdbuf, 0, sizeof (struct stat)); 633 634 stat (homeinit, &homebuf); 635 stat (gdbinit, &cwdbuf); /* We'll only need this if 636 homedir was set. */ 637 } 638 639 /* Now perform all the actions indicated by the arguments. */ 640 if (cdarg != NULL) 641 { 642 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL); 643 } 644 645 for (i = 0; i < ndir; i++) 646 catch_command_errors (directory_command, dirarg[i], 0, RETURN_MASK_ALL); 647 xfree (dirarg); 648 649 if (execarg != NULL 650 && symarg != NULL 651 && strcmp (execarg, symarg) == 0) 652 { 653 /* The exec file and the symbol-file are the same. If we can't 654 open it, better only print one error message. 655 catch_command_errors returns non-zero on success! */ 656 if (catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL)) 657 catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL); 658 } 659 else 660 { 661 if (execarg != NULL) 662 catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL); 663 if (symarg != NULL) 664 catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL); 665 } 666 667 /* After the symbol file has been read, print a newline to get us 668 beyond the copyright line... But errors should still set off 669 the error message with a (single) blank line. */ 670 if (!quiet) 671 printf_filtered ("\n"); 672 error_pre_print = "\n"; 673 quit_pre_print = error_pre_print; 674 warning_pre_print = _("\nwarning: "); 675 676 if (corearg != NULL) 677 { 678 /* corearg may be either a corefile or a pid. 679 If its first character is a digit, try attach first 680 and then corefile. Otherwise try corefile first. */ 681 682 if (isdigit (corearg[0])) 683 { 684 if (catch_command_errors (attach_command, corearg, 685 !batch, RETURN_MASK_ALL) == 0) 686 catch_command_errors (core_file_command, corearg, 687 !batch, RETURN_MASK_ALL); 688 } 689 else /* Can't be a pid, better be a corefile. */ 690 catch_command_errors (core_file_command, corearg, 691 !batch, RETURN_MASK_ALL); 692 } 693 694 if (ttyarg != NULL) 695 catch_command_errors (tty_command, ttyarg, !batch, RETURN_MASK_ALL); 696 697 /* Error messages should no longer be distinguished with extra output. */ 698 error_pre_print = NULL; 699 quit_pre_print = NULL; 700 warning_pre_print = _("warning: "); 701 702 /* Read the .gdbinit file in the current directory, *if* it isn't 703 the same as the $HOME/.gdbinit file (it should exist, also). */ 704 705 if (!homedir 706 || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat))) 707 if (!inhibit_gdbinit) 708 { 709 catch_command_errors (source_command, gdbinit, 0, RETURN_MASK_ALL); 710 } 711 712 for (i = 0; i < ncmd; i++) 713 { 714#if 0 715 /* NOTE: cagney/1999-11-03: SET_TOP_LEVEL() was a macro that 716 expanded into a call to setjmp(). */ 717 if (!SET_TOP_LEVEL ()) /* NB: This is #if 0'd out */ 718 { 719 /* NOTE: I am commenting this out, because it is not clear 720 where this feature is used. It is very old and 721 undocumented. ezannoni: 1999-05-04 */ 722#if 0 723 if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0') 724 read_command_file (stdin); 725 else 726#endif 727 source_command (cmdarg[i], !batch); 728 do_cleanups (ALL_CLEANUPS); 729 } 730#endif 731 catch_command_errors (source_command, cmdarg[i], !batch, RETURN_MASK_ALL); 732 } 733 xfree (cmdarg); 734 735 /* Read in the old history after all the command files have been read. */ 736 init_history (); 737 738 if (batch) 739 { 740 /* We have hit the end of the batch file. */ 741 exit (0); 742 } 743 744 /* Do any host- or target-specific hacks. This is used for i960 targets 745 to force the user to set a nindy target and spec its parameters. */ 746 747#ifdef BEFORE_MAIN_LOOP_HOOK 748 BEFORE_MAIN_LOOP_HOOK; 749#endif 750 751 /* Show time and/or space usage. */ 752 753 if (display_time) 754 { 755 long init_time = get_run_time () - time_at_startup; 756 757 printf_unfiltered (_("Startup time: %ld.%06ld\n"), 758 init_time / 1000000, init_time % 1000000); 759 } 760 761 if (display_space) 762 { 763#ifdef HAVE_SBRK 764 extern char **environ; 765 char *lim = (char *) sbrk (0); 766 767 printf_unfiltered (_("Startup size: data size %ld\n"), 768 (long) (lim - (char *) &environ)); 769#endif 770 } 771 772#if 0 773 /* FIXME: cagney/1999-11-06: The original main loop was like: */ 774 while (1) 775 { 776 if (!SET_TOP_LEVEL ()) 777 { 778 do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */ 779 /* GUIs generally have their own command loop, mainloop, or whatever. 780 This is a good place to gain control because many error 781 conditions will end up here via longjmp(). */ 782 if (command_loop_hook) 783 command_loop_hook (); 784 else 785 command_loop (); 786 quit_command ((char *) 0, instream == stdin); 787 } 788 } 789 /* NOTE: If the command_loop() returned normally, the loop would 790 attempt to exit by calling the function quit_command(). That 791 function would either call exit() or throw an error returning 792 control to SET_TOP_LEVEL. */ 793 /* NOTE: The function do_cleanups() was called once each time round 794 the loop. The usefulness of the call isn't clear. If an error 795 was thrown, everything would have already been cleaned up. If 796 command_loop() returned normally and quit_command() was called, 797 either exit() or error() (again cleaning up) would be called. */ 798#endif 799 /* NOTE: cagney/1999-11-07: There is probably no reason for not 800 moving this loop and the code found in captured_command_loop() 801 into the command_loop() proper. The main thing holding back that 802 change - SET_TOP_LEVEL() - has been eliminated. */ 803 while (1) 804 { 805 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL); 806 } 807 /* No exit -- exit is through quit_command. */ 808} 809 810int 811gdb_main (struct captured_main_args *args) 812{ 813 use_windows = args->use_windows; 814 catch_errors (captured_main, args, "", RETURN_MASK_ALL); 815 /* The only way to end up here is by an error (normal exit is 816 handled by quit_force()), hence always return an error status. */ 817 return 1; 818} 819 820 821/* Don't use *_filtered for printing help. We don't want to prompt 822 for continue no matter how small the screen or how much we're going 823 to print. */ 824 825static void 826print_gdb_help (struct ui_file *stream) 827{ 828 fputs_unfiltered (_("\ 829This is the GNU debugger. Usage:\n\n\ 830 gdb [options] [executable-file [core-file or process-id]]\n\ 831 gdb [options] --args executable-file [inferior-arguments ...]\n\n\ 832Options:\n\n\ 833"), stream); 834 fputs_unfiltered (_("\ 835 --args Arguments after executable-file are passed to inferior\n\ 836"), stream); 837 fputs_unfiltered (_("\ 838 --[no]async Enable (disable) asynchronous version of CLI\n\ 839"), stream); 840 fputs_unfiltered (_("\ 841 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\ 842 --batch Exit after processing options.\n\ 843 --cd=DIR Change current directory to DIR.\n\ 844 --command=FILE Execute GDB commands from FILE.\n\ 845 --core=COREFILE Analyze the core dump COREFILE.\n\ 846 --pid=PID Attach to running process PID.\n\ 847"), stream); 848 fputs_unfiltered (_("\ 849 --dbx DBX compatibility mode.\n\ 850 --directory=DIR Search for source files in DIR.\n\ 851 --epoch Output information used by epoch emacs-GDB interface.\n\ 852 --exec=EXECFILE Use EXECFILE as the executable.\n\ 853 --fullname Output information used by emacs-GDB interface.\n\ 854 --help Print this message.\n\ 855"), stream); 856 fputs_unfiltered (_("\ 857 --interpreter=INTERP\n\ 858 Select a specific interpreter / user interface\n\ 859"), stream); 860 fputs_unfiltered (_("\ 861 --mapped Use mapped symbol files if supported on this system.\n\ 862 --nw Do not use a window interface.\n\ 863 --nx Do not read "), stream); 864 fputs_unfiltered (gdbinit, stream); 865 fputs_unfiltered (_(" file.\n\ 866 --quiet Do not print version number on startup.\n\ 867 --readnow Fully read symbol files on first access.\n\ 868"), stream); 869 fputs_unfiltered (_("\ 870 --se=FILE Use FILE as symbol file and executable file.\n\ 871 --symbols=SYMFILE Read symbols from SYMFILE.\n\ 872 --tty=TTY Use TTY for input/output by the program being debugged.\n\ 873"), stream); 874#if defined(TUI) 875 fputs_unfiltered (_("\ 876 --tui Use a terminal user interface.\n\ 877"), stream); 878#endif 879 fputs_unfiltered (_("\ 880 --version Print version information and then exit.\n\ 881 -w Use a window interface.\n\ 882 --write Set writing into executable and core files.\n\ 883 --xdb XDB compatibility mode.\n\ 884"), stream); 885 fputs_unfiltered (_("\n\ 886For more information, type \"help\" from within GDB, or consult the\n\ 887GDB manual (available as on-line info or a printed manual).\n\ 888Report bugs to \"bug-gdb@gnu.org\".\ 889"), stream); 890} 891