gdb/main.c

   1 /* Top level stuff for GDB, the GNU debugger.
   2
   3    Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
   4    1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
   5    2009, 2010, 2011 Free Software 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 3 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, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "top.h"
  24 #include "target.h"
  25 #include "inferior.h"
  26 #include "symfile.h"
  27 #include "gdbcore.h"
  28
  29 #include "exceptions.h"
  30 #include "getopt.h"
  31
  32 #include <sys/types.h>
  33 #include "gdb_stat.h"
  34 #include <ctype.h>
  35
  36 #include "gdb_string.h"
  37 #include "event-loop.h"
  38 #include "ui-out.h"
  39
  40 #include "interps.h"
  41 #include "main.h"
  42 #include "source.h"
  43 #include "cli/cli-cmds.h"
  44 #include "python/python.h"
  45 #include "objfiles.h"
  46
  47 /* The selected interpreter.  This will be used as a set command
  48    variable, so it should always be malloc'ed - since
  49    do_setshow_command will free it.  */
  50 char *interpreter_p;
  51
  52 /* Whether xdb commands will be handled.  */
  53 int xdb_commands = 0;
  54
  55 /* Whether dbx commands will be handled.  */
  56 int dbx_commands = 0;
  57
  58 /* System root path, used to find libraries etc.  */
  59 char *gdb_sysroot = 0;
  60
  61 /* GDB datadir, used to store data files.  */
  62 char *gdb_datadir = 0;
  63
  64 /* If gdb was configured with --with-python=/path,
  65    the possibly relocated path to python's lib directory.  */
  66 char *python_libdir = 0;
  67
  68 struct ui_file *gdb_stdout;
  69 struct ui_file *gdb_stderr;
  70 struct ui_file *gdb_stdlog;
  71 struct ui_file *gdb_stdin;
  72 /* Target IO streams.  */
  73 struct ui_file *gdb_stdtargin;
  74 struct ui_file *gdb_stdtarg;
  75 struct ui_file *gdb_stdtargerr;
  76
  77 /* True if --batch or --batch-silent was seen.  */
  78 int batch_flag = 0;
  79
  80 /* Support for the --batch-silent option.  */
  81 int batch_silent = 0;
  82
  83 /* Support for --return-child-result option.
  84    Set the default to -1 to return error in the case
  85    that the program does not run or does not complete.  */
  86 int return_child_result = 0;
  87 int return_child_result_value = -1;
  88
  89 /* Whether to enable writing into executable and core files.  */
  90 extern int write_files;
  91
  92 /* GDB as it has been invoked from the command line (i.e. argv[0]).  */
  93 static char *gdb_program_name;
  94
  95 static void print_gdb_help (struct ui_file *);
  96
  97 /* These two are used to set the external editor commands when gdb is
  98    farming out files to be edited by another program.  */
  99
 100 extern char *external_editor_command;
 101
 102 /* Relocate a file or directory.  PROGNAME is the name by which gdb
 103    was invoked (i.e., argv[0]).  INITIAL is the default value for the
 104    file or directory.  FLAG is true if the value is relocatable, false
 105    otherwise.  Returns a newly allocated string; this may return NULL
 106    under the same conditions as make_relative_prefix.  */
 107
 108 static char *
 109 relocate_path (const char *progname, const char *initial, int flag)
 110 {
 111   if (flag)
 112     return make_relative_prefix (progname, BINDIR, initial);
 113   return xstrdup (initial);
 114 }
 115
 116 /* Like relocate_path, but specifically checks for a directory.
 117    INITIAL is relocated according to the rules of relocate_path.  If
 118    the result is a directory, it is used; otherwise, INITIAL is used.
 119    The chosen directory is then canonicalized using lrealpath.  This
 120    function always returns a newly-allocated string.  */
 121
 122 char *
 123 relocate_gdb_directory (const char *initial, int flag)
 124 {
 125   char *dir;
 126
 127   dir = relocate_path (gdb_program_name, initial, flag);
 128   if (dir)
 129     {
 130       struct stat s;
 131
 132       if (stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
 133         {
 134           xfree (dir);
 135           dir = NULL;
 136         }
 137     }
 138   if (!dir)
 139     dir = xstrdup (initial);
 140
 141   /* Canonicalize the directory.  */
 142   if (*dir)
 143     {
 144       char *canon_sysroot = lrealpath (dir);
 145
 146       if (canon_sysroot)
 147         {
 148           xfree (dir);
 149           dir = canon_sysroot;
 150         }
 151     }
 152
 153   return dir;
 154 }
 155
 156 /* Compute the locations of init files that GDB should source and
 157    return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT.  If
 158    there is no system gdbinit (resp. home gdbinit and local gdbinit)
 159    to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
 160    LOCAL_GDBINIT) is set to NULL.  */
 161 static void
 162 get_init_files (char **system_gdbinit,
 163                 char **home_gdbinit,
 164                 char **local_gdbinit)
 165 {
 166   static char *sysgdbinit = NULL;
 167   static char *homeinit = NULL;
 168   static char *localinit = NULL;
 169   static int initialized = 0;
 170
 171   if (!initialized)
 172     {
 173       struct stat homebuf, cwdbuf, s;
 174       char *homedir, *relocated_sysgdbinit;
 175
 176       if (SYSTEM_GDBINIT[0])
 177         {
 178           relocated_sysgdbinit = relocate_path (gdb_program_name,
 179                                                 SYSTEM_GDBINIT,
 180                                                 SYSTEM_GDBINIT_RELOCATABLE);
 181           if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
 182             sysgdbinit = relocated_sysgdbinit;
 183           else
 184             xfree (relocated_sysgdbinit);
 185         }
 186
 187       homedir = getenv ("HOME");
 188
 189       /* If the .gdbinit file in the current directory is the same as
 190          the $HOME/.gdbinit file, it should not be sourced.  homebuf
 191          and cwdbuf are used in that purpose.  Make sure that the stats
 192          are zero in case one of them fails (this guarantees that they
 193          won't match if either exists).  */
 194
 195       memset (&homebuf, 0, sizeof (struct stat));
 196       memset (&cwdbuf, 0, sizeof (struct stat));
 197
 198       if (homedir)
 199         {
 200           homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
 201           if (stat (homeinit, &homebuf) != 0)
 202             {
 203               xfree (homeinit);
 204               homeinit = NULL;
 205             }
 206         }
 207
 208       if (stat (gdbinit, &cwdbuf) == 0)
 209         {
 210           if (!homeinit
 211               || memcmp ((char *) &homebuf, (char *) &cwdbuf,
 212                          sizeof (struct stat)))
 213             localinit = gdbinit;
 214         }
 215
 216       initialized = 1;
 217     }
 218
 219   *system_gdbinit = sysgdbinit;
 220   *home_gdbinit = homeinit;
 221   *local_gdbinit = localinit;
 222 }
 223
 224 /* Call command_loop.  If it happens to return, pass that through as a
 225    non-zero return status.  */
 226
 227 static int
 228 captured_command_loop (void *data)
 229 {
 230   /* Top-level execution commands can be run on the background from
 231      here on.  */
 232   interpreter_async = 1;
 233
 234   current_interp_command_loop ();
 235   /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
 236      would clean things up (restoring the cleanup chain) to the state
 237      they were just prior to the call.  Technically, this means that
 238      the do_cleanups() below is redundant.  Unfortunately, many FUNCs
 239      are not that well behaved.  do_cleanups should either be replaced
 240      with a do_cleanups call (to cover the problem) or an assertion
 241      check to detect bad FUNCs code.  */
 242   do_cleanups (ALL_CLEANUPS);
 243   /* If the command_loop returned, normally (rather than threw an
 244      error) we try to quit.  If the quit is aborted, catch_errors()
 245      which called this catch the signal and restart the command
 246      loop.  */
 247   quit_command (NULL, instream == stdin);
 248   return 1;
 249 }
 250
 251 static int
 252 captured_main (void *data)
 253 {
 254   struct captured_main_args *context = data;
 255   int argc = context->argc;
 256   char **argv = context->argv;
 257   static int quiet = 0;
 258   static int set_args = 0;
 259
 260   /* Pointers to various arguments from command line.  */
 261   char *symarg = NULL;
 262   char *execarg = NULL;
 263   char *pidarg = NULL;
 264   char *corearg = NULL;
 265   char *pid_or_core_arg = NULL;
 266   char *cdarg = NULL;
 267   char *ttyarg = NULL;
 268
 269   /* These are static so that we can take their address in an
 270      initializer.  */
 271   static int print_help;
 272   static int print_version;
 273
 274   /* Pointers to all arguments of --command option.  */
 275   struct cmdarg {
 276     enum {
 277       CMDARG_FILE,
 278       CMDARG_COMMAND
 279     } type;
 280     char *string;
 281   } *cmdarg;
 282   /* Allocated size of cmdarg.  */
 283   int cmdsize;
 284   /* Number of elements of cmdarg used.  */
 285   int ncmd;
 286
 287   /* Indices of all arguments of --directory option.  */
 288   char **dirarg;
 289   /* Allocated size.  */
 290   int dirsize;
 291   /* Number of elements used.  */
 292   int ndir;
 293
 294   /* gdb init files.  */
 295   char *system_gdbinit;
 296   char *home_gdbinit;
 297   char *local_gdbinit;
 298
 299   int i;
 300   int save_auto_load;
 301   struct objfile *objfile;
 302
 303   struct cleanup *pre_stat_chain;
 304
 305 #ifdef HAVE_SBRK
 306   /* Set this before calling make_command_stats_cleanup.  */
 307   lim_at_start = (char *) sbrk (0);
 308 #endif
 309
 310   pre_stat_chain = make_command_stats_cleanup (0);
 311
 312 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
 313   setlocale (LC_MESSAGES, "");
 314 #endif
 315 #if defined (HAVE_SETLOCALE)
 316   setlocale (LC_CTYPE, "");
 317 #endif
 318   bindtextdomain (PACKAGE, LOCALEDIR);
 319   textdomain (PACKAGE);
 320
 321   cmdsize = 1;
 322   cmdarg = (struct cmdarg *) xmalloc (cmdsize * sizeof (*cmdarg));
 323   ncmd = 0;
 324   dirsize = 1;
 325   dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
 326   ndir = 0;
 327
 328   quit_flag = 0;
 329   saved_command_line = (char *) xmalloc (saved_command_line_size);
 330   saved_command_line[0] = '\0';
 331   instream = stdin;
 332
 333   gdb_stdout = stdio_fileopen (stdout);
 334   gdb_stderr = stdio_fileopen (stderr);
 335   gdb_stdlog = gdb_stderr;      /* for moment */
 336   gdb_stdtarg = gdb_stderr;     /* for moment */
 337   gdb_stdin = stdio_fileopen (stdin);
 338   gdb_stdtargerr = gdb_stderr;  /* for moment */
 339   gdb_stdtargin = gdb_stdin;    /* for moment */
 340
 341   gdb_program_name = xstrdup (argv[0]);
 342
 343   if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
 344     /* Don't use *_filtered or warning() (which relies on
 345        current_target) until after initialize_all_files().  */
 346     fprintf_unfiltered (gdb_stderr,
 347                         _("%s: warning: error finding "
 348                           "working directory: %s\n"),
 349                         argv[0], safe_strerror (errno));
 350
 351   current_directory = gdb_dirbuf;
 352
 353   /* Set the sysroot path.  */
 354   gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
 355                                         TARGET_SYSTEM_ROOT_RELOCATABLE);
 356
 357   debug_file_directory = relocate_gdb_directory (DEBUGDIR,
 358                                                  DEBUGDIR_RELOCATABLE);
 359
 360   gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
 361                                         GDB_DATADIR_RELOCATABLE);
 362
 363 #ifdef WITH_PYTHON_PATH
 364   {
 365     /* For later use in helping Python find itself.  */
 366     char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
 367
 368     python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
 369     xfree (tmp);
 370   }
 371 #endif
 372
 373 #ifdef RELOC_SRCDIR
 374   add_substitute_path_rule (RELOC_SRCDIR,
 375                             make_relative_prefix (argv[0], BINDIR,
 376                                                   RELOC_SRCDIR));
 377 #endif
 378
 379   /* There will always be an interpreter.  Either the one passed into
 380      this captured main, or one specified by the user at start up, or
 381      the console.  Initialize the interpreter to the one requested by
 382      the application.  */
 383   interpreter_p = xstrdup (context->interpreter_p);
 384
 385   /* Parse arguments and options.  */
 386   {
 387     int c;
 388     /* When var field is 0, use flag field to record the equivalent
 389        short option (or arbitrary numbers starting at 10 for those
 390        with no equivalent).  */
 391     enum {
 392       OPT_SE = 10,
 393       OPT_CD,
 394       OPT_ANNOTATE,
 395       OPT_STATISTICS,
 396       OPT_TUI,
 397       OPT_NOWINDOWS,
 398       OPT_WINDOWS
 399     };
 400     static struct option long_options[] =
 401     {
 402       {"tui", no_argument, 0, OPT_TUI},
 403       {"xdb", no_argument, &xdb_commands, 1},
 404       {"dbx", no_argument, &dbx_commands, 1},
 405       {"readnow", no_argument, &readnow_symbol_files, 1},
 406       {"r", no_argument, &readnow_symbol_files, 1},
 407       {"quiet", no_argument, &quiet, 1},
 408       {"q", no_argument, &quiet, 1},
 409       {"silent", no_argument, &quiet, 1},
 410       {"nx", no_argument, &inhibit_gdbinit, 1},
 411       {"n", no_argument, &inhibit_gdbinit, 1},
 412       {"batch-silent", no_argument, 0, 'B'},
 413       {"batch", no_argument, &batch_flag, 1},
 414       {"epoch", no_argument, &epoch_interface, 1},
 415
 416     /* This is a synonym for "--annotate=1".  --annotate is now
 417        preferred, but keep this here for a long time because people
 418        will be running emacses which use --fullname.  */
 419       {"fullname", no_argument, 0, 'f'},
 420       {"f", no_argument, 0, 'f'},
 421
 422       {"annotate", required_argument, 0, OPT_ANNOTATE},
 423       {"help", no_argument, &print_help, 1},
 424       {"se", required_argument, 0, OPT_SE},
 425       {"symbols", required_argument, 0, 's'},
 426       {"s", required_argument, 0, 's'},
 427       {"exec", required_argument, 0, 'e'},
 428       {"e", required_argument, 0, 'e'},
 429       {"core", required_argument, 0, 'c'},
 430       {"c", required_argument, 0, 'c'},
 431       {"pid", required_argument, 0, 'p'},
 432       {"p", required_argument, 0, 'p'},
 433       {"command", required_argument, 0, 'x'},
 434       {"eval-command", required_argument, 0, 'X'},
 435       {"version", no_argument, &print_version, 1},
 436       {"x", required_argument, 0, 'x'},
 437       {"ex", required_argument, 0, 'X'},
 438 #ifdef GDBTK
 439       {"tclcommand", required_argument, 0, 'z'},
 440       {"enable-external-editor", no_argument, 0, 'y'},
 441       {"editor-command", required_argument, 0, 'w'},
 442 #endif
 443       {"ui", required_argument, 0, 'i'},
 444       {"interpreter", required_argument, 0, 'i'},
 445       {"i", required_argument, 0, 'i'},
 446       {"directory", required_argument, 0, 'd'},
 447       {"d", required_argument, 0, 'd'},
 448       {"data-directory", required_argument, 0, 'D'},
 449       {"cd", required_argument, 0, OPT_CD},
 450       {"tty", required_argument, 0, 't'},
 451       {"baud", required_argument, 0, 'b'},
 452       {"b", required_argument, 0, 'b'},
 453       {"nw", no_argument, NULL, OPT_NOWINDOWS},
 454       {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
 455       {"w", no_argument, NULL, OPT_WINDOWS},
 456       {"windows", no_argument, NULL, OPT_WINDOWS},
 457       {"statistics", no_argument, 0, OPT_STATISTICS},
 458       {"write", no_argument, &write_files, 1},
 459       {"args", no_argument, &set_args, 1},
 460       {"l", required_argument, 0, 'l'},
 461       {"return-child-result", no_argument, &return_child_result, 1},
 462       {0, no_argument, 0, 0}
 463     };
 464
 465     while (1)
 466       {
 467         int option_index;
 468
 469         c = getopt_long_only (argc, argv, "",
 470                               long_options, &option_index);
 471         if (c == EOF || set_args)
 472           break;
 473
 474         /* Long option that takes an argument.  */
 475         if (c == 0 && long_options[option_index].flag == 0)
 476           c = long_options[option_index].val;
 477
 478         switch (c)
 479           {
 480           case 0:
 481             /* Long option that just sets a flag.  */
 482             break;
 483           case OPT_SE:
 484             symarg = optarg;
 485             execarg = optarg;
 486             break;
 487           case OPT_CD:
 488             cdarg = optarg;
 489             break;
 490           case OPT_ANNOTATE:
 491             /* FIXME: what if the syntax is wrong (e.g. not digits)?  */
 492             annotation_level = atoi (optarg);
 493             break;
 494           case OPT_STATISTICS:
 495             /* Enable the display of both time and space usage.  */
 496             set_display_time (1);
 497             set_display_space (1);
 498             break;
 499           case OPT_TUI:
 500             /* --tui is equivalent to -i=tui.  */
 501 #ifdef TUI
 502             xfree (interpreter_p);
 503             interpreter_p = xstrdup (INTERP_TUI);
 504 #else
 505             fprintf_unfiltered (gdb_stderr,
 506                                 _("%s: TUI mode is not supported\n"),
 507                                 argv[0]);
 508             exit (1);
 509 #endif
 510             break;
 511           case OPT_WINDOWS:
 512             /* FIXME: cagney/2003-03-01: Not sure if this option is
 513                actually useful, and if it is, what it should do.  */
 514 #ifdef GDBTK
 515             /* --windows is equivalent to -i=insight.  */
 516             xfree (interpreter_p);
 517             interpreter_p = xstrdup (INTERP_INSIGHT);
 518 #endif
 519             use_windows = 1;
 520             break;
 521           case OPT_NOWINDOWS:
 522             /* -nw is equivalent to -i=console.  */
 523             xfree (interpreter_p);
 524             interpreter_p = xstrdup (INTERP_CONSOLE);
 525             use_windows = 0;
 526             break;
 527           case 'f':
 528             annotation_level = 1;
 529             /* We have probably been invoked from emacs.  Disable
 530                window interface.  */
 531             use_windows = 0;
 532             break;
 533           case 's':
 534             symarg = optarg;
 535             break;
 536           case 'e':
 537             execarg = optarg;
 538             break;
 539           case 'c':
 540             corearg = optarg;
 541             break;
 542           case 'p':
 543             pidarg = optarg;
 544             break;
 545           case 'x':
 546             cmdarg[ncmd].type = CMDARG_FILE;
 547             cmdarg[ncmd++].string = optarg;
 548             if (ncmd >= cmdsize)
 549               {
 550                 cmdsize *= 2;
 551                 cmdarg = xrealloc ((char *) cmdarg,
 552                                    cmdsize * sizeof (*cmdarg));
 553               }
 554             break;
 555           case 'X':
 556             cmdarg[ncmd].type = CMDARG_COMMAND;
 557             cmdarg[ncmd++].string = optarg;
 558             if (ncmd >= cmdsize)
 559               {
 560                 cmdsize *= 2;
 561                 cmdarg = xrealloc ((char *) cmdarg,
 562                                    cmdsize * sizeof (*cmdarg));
 563               }
 564             break;
 565           case 'B':
 566             batch_flag = batch_silent = 1;
 567             gdb_stdout = ui_file_new();
 568             break;
 569           case 'D':
 570             xfree (gdb_datadir);
 571             gdb_datadir = xstrdup (optarg);
 572             break;
 573 #ifdef GDBTK
 574           case 'z':
 575             {
 576               extern int gdbtk_test (char *);
 577
 578               if (!gdbtk_test (optarg))
 579                 {
 580                   fprintf_unfiltered (gdb_stderr,
 581                                       _("%s: unable to load "
 582                                         "tclcommand file \"%s\""),
 583                                       argv[0], optarg);
 584                   exit (1);
 585                 }
 586               break;
 587             }
 588           case 'y':
 589             /* Backwards compatibility only.  */
 590             break;
 591           case 'w':
 592             {
 593               external_editor_command = xstrdup (optarg);
 594               break;
 595             }
 596 #endif /* GDBTK */
 597           case 'i':
 598             xfree (interpreter_p);
 599             interpreter_p = xstrdup (optarg);
 600             break;
 601           case 'd':
 602             dirarg[ndir++] = optarg;
 603             if (ndir >= dirsize)
 604               {
 605                 dirsize *= 2;
 606                 dirarg = (char **) xrealloc ((char *) dirarg,
 607                                              dirsize * sizeof (*dirarg));
 608               }
 609             break;
 610           case 't':
 611             ttyarg = optarg;
 612             break;
 613           case 'q':
 614             quiet = 1;
 615             break;
 616           case 'b':
 617             {
 618               int i;
 619               char *p;
 620
 621               i = strtol (optarg, &p, 0);
 622               if (i == 0 && p == optarg)
 623
 624                 /* Don't use *_filtered or warning() (which relies on
 625                    current_target) until after initialize_all_files().  */
 626
 627                 fprintf_unfiltered
 628                   (gdb_stderr,
 629                    _("warning: could not set baud rate to `%s'.\n"), optarg);
 630               else
 631                 baud_rate = i;
 632             }
 633             break;
 634           case 'l':
 635             {
 636               int i;
 637               char *p;
 638
 639               i = strtol (optarg, &p, 0);
 640               if (i == 0 && p == optarg)
 641
 642                 /* Don't use *_filtered or warning() (which relies on
 643                    current_target) until after initialize_all_files().  */
 644
 645                 fprintf_unfiltered (gdb_stderr,
 646                                     _("warning: could not set "
 647                                       "timeout limit to `%s'.\n"), optarg);
 648               else
 649                 remote_timeout = i;
 650             }
 651             break;
 652
 653           case '?':
 654             fprintf_unfiltered (gdb_stderr,
 655                                 _("Use `%s --help' for a "
 656                                   "complete list of options.\n"),
 657                                 argv[0]);
 658             exit (1);
 659           }
 660       }
 661
 662     /* If --help or --version, disable window interface.  */
 663     if (print_help || print_version)
 664       {
 665         use_windows = 0;
 666       }
 667
 668     if (batch_flag)
 669       quiet = 1;
 670   }
 671
 672   /* Initialize all files.  Give the interpreter a chance to take
 673      control of the console via the deprecated_init_ui_hook ().  */
 674   gdb_init (argv[0]);
 675
 676   /* Now that gdb_init has created the initial inferior, we're in
 677      position to set args for that inferior.  */
 678   if (set_args)
 679     {
 680       /* The remaining options are the command-line options for the
 681          inferior.  The first one is the sym/exec file, and the rest
 682          are arguments.  */
 683       if (optind >= argc)
 684         {
 685           fprintf_unfiltered (gdb_stderr,
 686                               _("%s: `--args' specified but "
 687                                 "no program specified\n"),
 688                               argv[0]);
 689           exit (1);
 690         }
 691       symarg = argv[optind];
 692       execarg = argv[optind];
 693       ++optind;
 694       set_inferior_args_vector (argc - optind, &argv[optind]);
 695     }
 696   else
 697     {
 698       /* OK, that's all the options.  */
 699
 700       /* The first argument, if specified, is the name of the
 701          executable.  */
 702       if (optind < argc)
 703         {
 704           symarg = argv[optind];
 705           execarg = argv[optind];
 706           optind++;
 707         }
 708
 709       /* If the user hasn't already specified a PID or the name of a
 710          core file, then a second optional argument is allowed.  If
 711          present, this argument should be interpreted as either a
 712          PID or a core file, whichever works.  */
 713       if (pidarg == NULL && corearg == NULL && optind < argc)
 714         {
 715           pid_or_core_arg = argv[optind];
 716           optind++;
 717         }
 718
 719       /* Any argument left on the command line is unexpected and
 720          will be ignored.  Inform the user.  */
 721       if (optind < argc)
 722         fprintf_unfiltered (gdb_stderr,
 723                             _("Excess command line "
 724                               "arguments ignored. (%s%s)\n"),
 725                             argv[optind],
 726                             (optind == argc - 1) ? "" : " ...");
 727     }
 728
 729   /* Lookup gdbinit files.  Note that the gdbinit file name may be
 730      overriden during file initialization, so get_init_files should be
 731      called after gdb_init.  */
 732   get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
 733
 734   /* Do these (and anything which might call wrap_here or *_filtered)
 735      after initialize_all_files() but before the interpreter has been
 736      installed.  Otherwize the help/version messages will be eaten by
 737      the interpreter's output handler.  */
 738
 739   if (print_version)
 740     {
 741       print_gdb_version (gdb_stdout);
 742       wrap_here ("");
 743       printf_filtered ("\n");
 744       exit (0);
 745     }
 746
 747   if (print_help)
 748     {
 749       print_gdb_help (gdb_stdout);
 750       fputs_unfiltered ("\n", gdb_stdout);
 751       exit (0);
 752     }
 753
 754   /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
 755      GDB retain the old MI1 interpreter startup behavior.  Output the
 756      copyright message before the interpreter is installed.  That way
 757      it isn't encapsulated in MI output.  */
 758   if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
 759     {
 760       /* Print all the junk at the top, with trailing "..." if we are
 761          about to read a symbol file (possibly slowly).  */
 762       print_gdb_version (gdb_stdout);
 763       if (symarg)
 764         printf_filtered ("..");
 765       wrap_here ("");
 766       printf_filtered ("\n");
 767       gdb_flush (gdb_stdout);   /* Force to screen during slow
 768                                    operations.  */
 769     }
 770
 771   /* Install the default UI.  All the interpreters should have had a
 772      look at things by now.  Initialize the default interpreter.  */
 773
 774   {
 775     /* Find it.  */
 776     struct interp *interp = interp_lookup (interpreter_p);
 777
 778     if (interp == NULL)
 779       error (_("Interpreter `%s' unrecognized"), interpreter_p);
 780     /* Install it.  */
 781     if (!interp_set (interp, 1))
 782       {
 783         fprintf_unfiltered (gdb_stderr,
 784                             "Interpreter `%s' failed to initialize.\n",
 785                             interpreter_p);
 786         exit (1);
 787       }
 788   }
 789
 790   /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
 791      GDB retain the old MI1 interpreter startup behavior.  Output the
 792      copyright message after the interpreter is installed when it is
 793      any sane interpreter.  */
 794   if (!quiet && !current_interp_named_p (INTERP_MI1))
 795     {
 796       /* Print all the junk at the top, with trailing "..." if we are
 797          about to read a symbol file (possibly slowly).  */
 798       print_gdb_version (gdb_stdout);
 799       if (symarg)
 800         printf_filtered ("..");
 801       wrap_here ("");
 802       printf_filtered ("\n");
 803       gdb_flush (gdb_stdout);   /* Force to screen during slow
 804                                    operations.  */
 805     }
 806
 807   /* Set off error and warning messages with a blank line.  */
 808   error_pre_print = "\n";
 809   quit_pre_print = error_pre_print;
 810   warning_pre_print = _("\nwarning: ");
 811
 812   /* Read and execute the system-wide gdbinit file, if it exists.
 813      This is done *before* all the command line arguments are
 814      processed; it sets global parameters, which are independent of
 815      what file you are debugging or what directory you are in.  */
 816   if (system_gdbinit && !inhibit_gdbinit)
 817     catch_command_errors (source_script, system_gdbinit, 0, RETURN_MASK_ALL);
 818
 819   /* Read and execute $HOME/.gdbinit file, if it exists.  This is done
 820      *before* all the command line arguments are processed; it sets
 821      global parameters, which are independent of what file you are
 822      debugging or what directory you are in.  */
 823
 824   if (home_gdbinit && !inhibit_gdbinit)
 825     catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL);
 826
 827   /* Now perform all the actions indicated by the arguments.  */
 828   if (cdarg != NULL)
 829     {
 830       catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
 831     }
 832
 833   for (i = 0; i < ndir; i++)
 834     catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
 835   xfree (dirarg);
 836
 837   /* Skip auto-loading section-specified scripts until we've sourced
 838      local_gdbinit (which is often used to augment the source search
 839      path).  */
 840   save_auto_load = gdbpy_global_auto_load;
 841   gdbpy_global_auto_load = 0;
 842
 843   if (execarg != NULL
 844       && symarg != NULL
 845       && strcmp (execarg, symarg) == 0)
 846     {
 847       /* The exec file and the symbol-file are the same.  If we can't
 848          open it, better only print one error message.
 849          catch_command_errors returns non-zero on success!  */
 850       if (catch_command_errors (exec_file_attach, execarg,
 851                                 !batch_flag, RETURN_MASK_ALL))
 852         catch_command_errors (symbol_file_add_main, symarg,
 853                               !batch_flag, RETURN_MASK_ALL);
 854     }
 855   else
 856     {
 857       if (execarg != NULL)
 858         catch_command_errors (exec_file_attach, execarg,
 859                               !batch_flag, RETURN_MASK_ALL);
 860       if (symarg != NULL)
 861         catch_command_errors (symbol_file_add_main, symarg,
 862                               !batch_flag, RETURN_MASK_ALL);
 863     }
 864
 865   if (corearg && pidarg)
 866     error (_("Can't attach to process and specify "
 867              "a core file at the same time."));
 868
 869   if (corearg != NULL)
 870     catch_command_errors (core_file_command, corearg,
 871                           !batch_flag, RETURN_MASK_ALL);
 872   else if (pidarg != NULL)
 873     catch_command_errors (attach_command, pidarg,
 874                           !batch_flag, RETURN_MASK_ALL);
 875   else if (pid_or_core_arg)
 876     {
 877       /* The user specified 'gdb program pid' or gdb program core'.
 878          If pid_or_core_arg's first character is a digit, try attach
 879          first and then corefile.  Otherwise try just corefile.  */
 880
 881       if (isdigit (pid_or_core_arg[0]))
 882         {
 883           if (catch_command_errors (attach_command, pid_or_core_arg,
 884                                     !batch_flag, RETURN_MASK_ALL) == 0)
 885             catch_command_errors (core_file_command, pid_or_core_arg,
 886                                   !batch_flag, RETURN_MASK_ALL);
 887         }
 888       else /* Can't be a pid, better be a corefile.  */
 889         catch_command_errors (core_file_command, pid_or_core_arg,
 890                               !batch_flag, RETURN_MASK_ALL);
 891     }
 892
 893   if (ttyarg != NULL)
 894     set_inferior_io_terminal (ttyarg);
 895
 896   /* Error messages should no longer be distinguished with extra output.  */
 897   error_pre_print = NULL;
 898   quit_pre_print = NULL;
 899   warning_pre_print = _("warning: ");
 900
 901   /* Read the .gdbinit file in the current directory, *if* it isn't
 902      the same as the $HOME/.gdbinit file (it should exist, also).  */
 903   if (local_gdbinit && !inhibit_gdbinit)
 904     catch_command_errors (source_script, local_gdbinit, 0, RETURN_MASK_ALL);
 905
 906   /* Now that all .gdbinit's have been read and all -d options have been
 907      processed, we can read any scripts mentioned in SYMARG.
 908      We wait until now because it is common to add to the source search
 909      path in local_gdbinit.  */
 910   gdbpy_global_auto_load = save_auto_load;
 911   ALL_OBJFILES (objfile)
 912     load_auto_scripts_for_objfile (objfile);
 913
 914   for (i = 0; i < ncmd; i++)
 915     {
 916       if (cmdarg[i].type == CMDARG_FILE)
 917         catch_command_errors (source_script, cmdarg[i].string,
 918                               !batch_flag, RETURN_MASK_ALL);
 919       else  /* cmdarg[i].type == CMDARG_COMMAND */
 920         catch_command_errors (execute_command, cmdarg[i].string,
 921                               !batch_flag, RETURN_MASK_ALL);
 922     }
 923   xfree (cmdarg);
 924
 925   /* Read in the old history after all the command files have been
 926      read.  */
 927   init_history ();
 928
 929   if (batch_flag)
 930     {
 931       /* We have hit the end of the batch file.  */
 932       quit_force (NULL, 0);
 933     }
 934
 935   /* Show time and/or space usage.  */
 936   do_cleanups (pre_stat_chain);
 937
 938   /* NOTE: cagney/1999-11-07: There is probably no reason for not
 939      moving this loop and the code found in captured_command_loop()
 940      into the command_loop() proper.  The main thing holding back that
 941      change - SET_TOP_LEVEL() - has been eliminated.  */
 942   while (1)
 943     {
 944       catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
 945     }
 946   /* No exit -- exit is through quit_command.  */
 947 }
 948
 949 int
 950 gdb_main (struct captured_main_args *args)
 951 {
 952   use_windows = args->use_windows;
 953   catch_errors (captured_main, args, "", RETURN_MASK_ALL);
 954   /* The only way to end up here is by an error (normal exit is
 955      handled by quit_force()), hence always return an error status.  */
 956   return 1;
 957 }
 958
 959
 960 /* Don't use *_filtered for printing help.  We don't want to prompt
 961    for continue no matter how small the screen or how much we're going
 962    to print.  */
 963
 964 static void
 965 print_gdb_help (struct ui_file *stream)
 966 {
 967   char *system_gdbinit;
 968   char *home_gdbinit;
 969   char *local_gdbinit;
 970
 971   get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
 972
 973   fputs_unfiltered (_("\
 974 This is the GNU debugger.  Usage:\n\n\
 975     gdb [options] [executable-file [core-file or process-id]]\n\
 976     gdb [options] --args executable-file [inferior-arguments ...]\n\n\
 977 Options:\n\n\
 978 "), stream);
 979   fputs_unfiltered (_("\
 980   --args             Arguments after executable-file are passed to inferior\n\
 981 "), stream);
 982   fputs_unfiltered (_("\
 983   -b BAUDRATE        Set serial port baud rate used for remote debugging.\n\
 984   --batch            Exit after processing options.\n\
 985   --batch-silent     As for --batch, but suppress all gdb stdout output.\n\
 986   --return-child-result\n\
 987                      GDB exit code will be the child's exit code.\n\
 988   --cd=DIR           Change current directory to DIR.\n\
 989   --command=FILE, -x Execute GDB commands from FILE.\n\
 990   --eval-command=COMMAND, -ex\n\
 991                      Execute a single GDB command.\n\
 992                      May be used multiple times and in conjunction\n\
 993                      with --command.\n\
 994   --core=COREFILE    Analyze the core dump COREFILE.\n\
 995   --pid=PID          Attach to running process PID.\n\
 996 "), stream);
 997   fputs_unfiltered (_("\
 998   --dbx              DBX compatibility mode.\n\
 999   --directory=DIR    Search for source files in DIR.\n\
1000   --epoch            Output information used by epoch emacs-GDB interface.\n\
1001   --exec=EXECFILE    Use EXECFILE as the executable.\n\
1002   --fullname         Output information used by emacs-GDB interface.\n\
1003   --help             Print this message.\n\
1004 "), stream);
1005   fputs_unfiltered (_("\
1006   --interpreter=INTERP\n\
1007                      Select a specific interpreter / user interface\n\
1008 "), stream);
1009   fputs_unfiltered (_("\
1010   -l TIMEOUT         Set timeout in seconds for remote debugging.\n\
1011   --nw               Do not use a window interface.\n\
1012   --nx               Do not read "), stream);
1013   fputs_unfiltered (gdbinit, stream);
1014   fputs_unfiltered (_(" file.\n\
1015   --quiet            Do not print version number on startup.\n\
1016   --readnow          Fully read symbol files on first access.\n\
1017 "), stream);
1018   fputs_unfiltered (_("\
1019   --se=FILE          Use FILE as symbol file and executable file.\n\
1020   --symbols=SYMFILE  Read symbols from SYMFILE.\n\
1021   --tty=TTY          Use TTY for input/output by the program being debugged.\n\
1022 "), stream);
1023 #if defined(TUI)
1024   fputs_unfiltered (_("\
1025   --tui              Use a terminal user interface.\n\
1026 "), stream);
1027 #endif
1028   fputs_unfiltered (_("\
1029   --version          Print version information and then exit.\n\
1030   -w                 Use a window interface.\n\
1031   --write            Set writing into executable and core files.\n\
1032   --xdb              XDB compatibility mode.\n\
1033 "), stream);
1034   fputs_unfiltered (_("\n\
1035 At startup, GDB reads the following init files and executes their commands:\n\
1036 "), stream);
1037   if (system_gdbinit)
1038     fprintf_unfiltered (stream, _("\
1039    * system-wide init file: %s\n\
1040 "), system_gdbinit);
1041   if (home_gdbinit)
1042     fprintf_unfiltered (stream, _("\
1043    * user-specific init file: %s\n\
1044 "), home_gdbinit);
1045   if (local_gdbinit)
1046     fprintf_unfiltered (stream, _("\
1047    * local init file: ./%s\n\
1048 "), local_gdbinit);
1049   fputs_unfiltered (_("\n\
1050 For more information, type \"help\" from within GDB, or consult the\n\
1051 GDB manual (available as on-line info or a printed manual).\n\
1052 "), stream);
1053   if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1054     fprintf_unfiltered (stream, _("\
1055 Report bugs to \"%s\".\n\
1056 "), REPORT_BUGS_TO);
1057 }