1 /* Top level stuff for GDB, the GNU debugger.
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.
7 This file is part of GDB.
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.
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.
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/>. */
29 #include "exceptions.h"
32 #include <sys/types.h>
36 #include "gdb_string.h"
37 #include "event-loop.h"
43 #include "cli/cli-cmds.h"
44 #include "python/python.h"
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. */
52 /* Whether xdb commands will be handled. */
55 /* Whether dbx commands will be handled. */
58 /* System root path, used to find libraries etc. */
59 char *gdb_sysroot = 0;
61 /* GDB datadir, used to store data files. */
62 char *gdb_datadir = 0;
64 /* If gdb was configured with --with-python=/path,
65 the possibly relocated path to python's lib directory. */
66 char *python_libdir = 0;
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;
77 /* True if --batch or --batch-silent was seen. */
80 /* Support for the --batch-silent option. */
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;
89 /* Whether to enable writing into executable and core files. */
90 extern int write_files;
92 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
93 static char *gdb_program_name;
95 static void print_gdb_help (struct ui_file *);
97 /* These two are used to set the external editor commands when gdb is
98 farming out files to be edited by another program. */
100 extern char *external_editor_command;
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. */
109 relocate_path (const char *progname, const char *initial, int flag)
112 return make_relative_prefix (progname, BINDIR, initial);
113 return xstrdup (initial);
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. */
123 relocate_gdb_directory (const char *initial, int flag)
127 dir = relocate_path (gdb_program_name, initial, flag);
132 if (stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
139 dir = xstrdup (initial);
141 /* Canonicalize the directory. */
144 char *canon_sysroot = lrealpath (dir);
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. */
162 get_init_files (char **system_gdbinit,
164 char **local_gdbinit)
166 static char *sysgdbinit = NULL;
167 static char *homeinit = NULL;
168 static char *localinit = NULL;
169 static int initialized = 0;
173 struct stat homebuf, cwdbuf, s;
174 char *homedir, *relocated_sysgdbinit;
176 if (SYSTEM_GDBINIT[0])
178 relocated_sysgdbinit = relocate_path (gdb_program_name,
180 SYSTEM_GDBINIT_RELOCATABLE);
181 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
182 sysgdbinit = relocated_sysgdbinit;
184 xfree (relocated_sysgdbinit);
187 homedir = getenv ("HOME");
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). */
195 memset (&homebuf, 0, sizeof (struct stat));
196 memset (&cwdbuf, 0, sizeof (struct stat));
200 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
201 if (stat (homeinit, &homebuf) != 0)
208 if (stat (gdbinit, &cwdbuf) == 0)
211 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
212 sizeof (struct stat)))
219 *system_gdbinit = sysgdbinit;
220 *home_gdbinit = homeinit;
221 *local_gdbinit = localinit;
224 /* Call command_loop. If it happens to return, pass that through as a
225 non-zero return status. */
228 captured_command_loop (void *data)
230 /* Top-level execution commands can be run on the background from
232 interpreter_async = 1;
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
247 quit_command (NULL, instream == stdin);
252 captured_main (void *data)
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;
260 /* Pointers to various arguments from command line. */
262 char *execarg = NULL;
264 char *corearg = NULL;
265 char *pid_or_core_arg = NULL;
269 /* These are static so that we can take their address in an
271 static int print_help;
272 static int print_version;
274 /* Pointers to all arguments of --command option. */
282 /* Allocated size of cmdarg. */
284 /* Number of elements of cmdarg used. */
287 /* Indices of all arguments of --directory option. */
289 /* Allocated size. */
291 /* Number of elements used. */
294 /* gdb init files. */
295 char *system_gdbinit;
301 struct objfile *objfile;
303 struct cleanup *pre_stat_chain;
306 /* Set this before calling make_command_stats_cleanup. */
307 lim_at_start = (char *) sbrk (0);
310 pre_stat_chain = make_command_stats_cleanup (0);
312 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
313 setlocale (LC_MESSAGES, "");
315 #if defined (HAVE_SETLOCALE)
316 setlocale (LC_CTYPE, "");
318 bindtextdomain (PACKAGE, LOCALEDIR);
319 textdomain (PACKAGE);
322 cmdarg = (struct cmdarg *) xmalloc (cmdsize * sizeof (*cmdarg));
325 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
329 saved_command_line = (char *) xmalloc (saved_command_line_size);
330 saved_command_line[0] = '\0';
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 */
341 gdb_program_name = xstrdup (argv[0]);
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));
351 current_directory = gdb_dirbuf;
353 /* Set the sysroot path. */
354 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
355 TARGET_SYSTEM_ROOT_RELOCATABLE);
357 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
358 DEBUGDIR_RELOCATABLE);
360 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
361 GDB_DATADIR_RELOCATABLE);
363 #ifdef WITH_PYTHON_PATH
365 /* For later use in helping Python find itself. */
366 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
368 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
374 add_substitute_path_rule (RELOC_SRCDIR,
375 make_relative_prefix (argv[0], BINDIR,
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
383 interpreter_p = xstrdup (context->interpreter_p);
385 /* Parse arguments and options. */
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). */
400 static struct option long_options[] =
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},
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'},
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'},
439 {"tclcommand", required_argument, 0, 'z'},
440 {"enable-external-editor", no_argument, 0, 'y'},
441 {"editor-command", required_argument, 0, 'w'},
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}
469 c = getopt_long_only (argc, argv, "",
470 long_options, &option_index);
471 if (c == EOF || set_args)
474 /* Long option that takes an argument. */
475 if (c == 0 && long_options[option_index].flag == 0)
476 c = long_options[option_index].val;
481 /* Long option that just sets a flag. */
491 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
492 annotation_level = atoi (optarg);
495 /* Enable the display of both time and space usage. */
496 set_display_time (1);
497 set_display_space (1);
500 /* --tui is equivalent to -i=tui. */
502 xfree (interpreter_p);
503 interpreter_p = xstrdup (INTERP_TUI);
505 fprintf_unfiltered (gdb_stderr,
506 _("%s: TUI mode is not supported\n"),
512 /* FIXME: cagney/2003-03-01: Not sure if this option is
513 actually useful, and if it is, what it should do. */
515 /* --windows is equivalent to -i=insight. */
516 xfree (interpreter_p);
517 interpreter_p = xstrdup (INTERP_INSIGHT);
522 /* -nw is equivalent to -i=console. */
523 xfree (interpreter_p);
524 interpreter_p = xstrdup (INTERP_CONSOLE);
528 annotation_level = 1;
529 /* We have probably been invoked from emacs. Disable
546 cmdarg[ncmd].type = CMDARG_FILE;
547 cmdarg[ncmd++].string = optarg;
551 cmdarg = xrealloc ((char *) cmdarg,
552 cmdsize * sizeof (*cmdarg));
556 cmdarg[ncmd].type = CMDARG_COMMAND;
557 cmdarg[ncmd++].string = optarg;
561 cmdarg = xrealloc ((char *) cmdarg,
562 cmdsize * sizeof (*cmdarg));
566 batch_flag = batch_silent = 1;
567 gdb_stdout = ui_file_new();
571 gdb_datadir = xstrdup (optarg);
576 extern int gdbtk_test (char *);
578 if (!gdbtk_test (optarg))
580 fprintf_unfiltered (gdb_stderr,
581 _("%s: unable to load "
582 "tclcommand file \"%s\""),
589 /* Backwards compatibility only. */
593 external_editor_command = xstrdup (optarg);
598 xfree (interpreter_p);
599 interpreter_p = xstrdup (optarg);
602 dirarg[ndir++] = optarg;
606 dirarg = (char **) xrealloc ((char *) dirarg,
607 dirsize * sizeof (*dirarg));
621 i = strtol (optarg, &p, 0);
622 if (i == 0 && p == optarg)
624 /* Don't use *_filtered or warning() (which relies on
625 current_target) until after initialize_all_files(). */
629 _("warning: could not set baud rate to `%s'.\n"), optarg);
639 i = strtol (optarg, &p, 0);
640 if (i == 0 && p == optarg)
642 /* Don't use *_filtered or warning() (which relies on
643 current_target) until after initialize_all_files(). */
645 fprintf_unfiltered (gdb_stderr,
646 _("warning: could not set "
647 "timeout limit to `%s'.\n"), optarg);
654 fprintf_unfiltered (gdb_stderr,
655 _("Use `%s --help' for a "
656 "complete list of options.\n"),
662 /* If --help or --version, disable window interface. */
663 if (print_help || print_version)
672 /* Initialize all files. Give the interpreter a chance to take
673 control of the console via the deprecated_init_ui_hook (). */
676 /* Now that gdb_init has created the initial inferior, we're in
677 position to set args for that inferior. */
680 /* The remaining options are the command-line options for the
681 inferior. The first one is the sym/exec file, and the rest
685 fprintf_unfiltered (gdb_stderr,
686 _("%s: `--args' specified but "
687 "no program specified\n"),
691 symarg = argv[optind];
692 execarg = argv[optind];
694 set_inferior_args_vector (argc - optind, &argv[optind]);
698 /* OK, that's all the options. */
700 /* The first argument, if specified, is the name of the
704 symarg = argv[optind];
705 execarg = argv[optind];
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)
715 pid_or_core_arg = argv[optind];
719 /* Any argument left on the command line is unexpected and
720 will be ignored. Inform the user. */
722 fprintf_unfiltered (gdb_stderr,
723 _("Excess command line "
724 "arguments ignored. (%s%s)\n"),
726 (optind == argc - 1) ? "" : " ...");
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);
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. */
741 print_gdb_version (gdb_stdout);
743 printf_filtered ("\n");
749 print_gdb_help (gdb_stdout);
750 fputs_unfiltered ("\n", gdb_stdout);
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)
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);
764 printf_filtered ("..");
766 printf_filtered ("\n");
767 gdb_flush (gdb_stdout); /* Force to screen during slow
771 /* Install the default UI. All the interpreters should have had a
772 look at things by now. Initialize the default interpreter. */
776 struct interp *interp = interp_lookup (interpreter_p);
779 error (_("Interpreter `%s' unrecognized"), interpreter_p);
781 if (!interp_set (interp, 1))
783 fprintf_unfiltered (gdb_stderr,
784 "Interpreter `%s' failed to initialize.\n",
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))
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);
800 printf_filtered ("..");
802 printf_filtered ("\n");
803 gdb_flush (gdb_stdout); /* Force to screen during slow
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: ");
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);
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. */
824 if (home_gdbinit && !inhibit_gdbinit)
825 catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL);
827 /* Now perform all the actions indicated by the arguments. */
830 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
833 for (i = 0; i < ndir; i++)
834 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
837 /* Skip auto-loading section-specified scripts until we've sourced
838 local_gdbinit (which is often used to augment the source search
840 save_auto_load = gdbpy_global_auto_load;
841 gdbpy_global_auto_load = 0;
845 && strcmp (execarg, symarg) == 0)
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);
858 catch_command_errors (exec_file_attach, execarg,
859 !batch_flag, RETURN_MASK_ALL);
861 catch_command_errors (symbol_file_add_main, symarg,
862 !batch_flag, RETURN_MASK_ALL);
865 if (corearg && pidarg)
866 error (_("Can't attach to process and specify "
867 "a core file at the same time."));
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)
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. */
881 if (isdigit (pid_or_core_arg[0]))
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);
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);
894 set_inferior_io_terminal (ttyarg);
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: ");
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);
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);
914 for (i = 0; i < ncmd; i++)
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);
925 /* Read in the old history after all the command files have been
931 /* We have hit the end of the batch file. */
932 quit_force (NULL, 0);
935 /* Show time and/or space usage. */
936 do_cleanups (pre_stat_chain);
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. */
944 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
946 /* No exit -- exit is through quit_command. */
950 gdb_main (struct captured_main_args *args)
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. */
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
965 print_gdb_help (struct ui_file *stream)
967 char *system_gdbinit;
971 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
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\
979 fputs_unfiltered (_("\
980 --args Arguments after executable-file are passed to inferior\n\
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\
994 --core=COREFILE Analyze the core dump COREFILE.\n\
995 --pid=PID Attach to running process PID.\n\
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\
1005 fputs_unfiltered (_("\
1006 --interpreter=INTERP\n\
1007 Select a specific interpreter / user interface\n\
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\
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\
1024 fputs_unfiltered (_("\
1025 --tui Use a terminal user interface.\n\
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\
1034 fputs_unfiltered (_("\n\
1035 At startup, GDB reads the following init files and executes their commands:\n\
1038 fprintf_unfiltered (stream, _("\
1039 * system-wide init file: %s\n\
1040 "), system_gdbinit);
1042 fprintf_unfiltered (stream, _("\
1043 * user-specific init file: %s\n\
1046 fprintf_unfiltered (stream, _("\
1047 * local init file: ./%s\n\
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\
1053 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1054 fprintf_unfiltered (stream, _("\
1055 Report bugs to \"%s\".\n\
1056 "), REPORT_BUGS_TO);