1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2005, 2007-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "exceptions.h"
30 #include <sys/types.h>
34 #include "gdb_string.h"
35 #include "event-loop.h"
41 #include "cli/cli-cmds.h"
42 #include "python/python.h"
45 /* The selected interpreter. This will be used as a set command
46 variable, so it should always be malloc'ed - since
47 do_setshow_command will free it. */
50 /* Whether xdb commands will be handled. */
53 /* Whether dbx commands will be handled. */
56 /* System root path, used to find libraries etc. */
57 char *gdb_sysroot = 0;
59 /* GDB datadir, used to store data files. */
60 char *gdb_datadir = 0;
62 /* If gdb was configured with --with-python=/path,
63 the possibly relocated path to python's lib directory. */
64 char *python_libdir = 0;
66 struct ui_file *gdb_stdout;
67 struct ui_file *gdb_stderr;
68 struct ui_file *gdb_stdlog;
69 struct ui_file *gdb_stdin;
70 /* Target IO streams. */
71 struct ui_file *gdb_stdtargin;
72 struct ui_file *gdb_stdtarg;
73 struct ui_file *gdb_stdtargerr;
75 /* True if --batch or --batch-silent was seen. */
78 /* Support for the --batch-silent option. */
81 /* Support for --return-child-result option.
82 Set the default to -1 to return error in the case
83 that the program does not run or does not complete. */
84 int return_child_result = 0;
85 int return_child_result_value = -1;
87 /* Whether to enable writing into executable and core files. */
88 extern int write_files;
90 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
91 static char *gdb_program_name;
93 /* DragonFly kgdb support */
96 static void print_gdb_help (struct ui_file *);
98 /* These two are used to set the external editor commands when gdb is
99 farming out files to be edited by another program. */
101 extern char *external_editor_command;
103 /* Relocate a file or directory. PROGNAME is the name by which gdb
104 was invoked (i.e., argv[0]). INITIAL is the default value for the
105 file or directory. FLAG is true if the value is relocatable, false
106 otherwise. Returns a newly allocated string; this may return NULL
107 under the same conditions as make_relative_prefix. */
110 relocate_path (const char *progname, const char *initial, int flag)
113 return make_relative_prefix (progname, BINDIR, initial);
114 return xstrdup (initial);
117 /* Like relocate_path, but specifically checks for a directory.
118 INITIAL is relocated according to the rules of relocate_path. If
119 the result is a directory, it is used; otherwise, INITIAL is used.
120 The chosen directory is then canonicalized using lrealpath. This
121 function always returns a newly-allocated string. */
124 relocate_gdb_directory (const char *initial, int flag)
128 dir = relocate_path (gdb_program_name, initial, flag);
133 if (stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
140 dir = xstrdup (initial);
142 /* Canonicalize the directory. */
145 char *canon_sysroot = lrealpath (dir);
157 /* Compute the locations of init files that GDB should source and
158 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
159 there is no system gdbinit (resp. home gdbinit and local gdbinit)
160 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
161 LOCAL_GDBINIT) is set to NULL. */
163 get_init_files (char **system_gdbinit,
165 char **local_gdbinit)
167 static char *sysgdbinit = NULL;
168 static char *homeinit = NULL;
169 static char *localinit = NULL;
170 static int initialized = 0;
174 struct stat homebuf, cwdbuf, s;
175 char *homedir, *relocated_sysgdbinit;
177 if (SYSTEM_GDBINIT[0])
179 relocated_sysgdbinit = relocate_path (gdb_program_name,
181 SYSTEM_GDBINIT_RELOCATABLE);
182 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
183 sysgdbinit = relocated_sysgdbinit;
185 xfree (relocated_sysgdbinit);
188 homedir = getenv ("HOME");
190 /* If the .gdbinit file in the current directory is the same as
191 the $HOME/.gdbinit file, it should not be sourced. homebuf
192 and cwdbuf are used in that purpose. Make sure that the stats
193 are zero in case one of them fails (this guarantees that they
194 won't match if either exists). */
196 memset (&homebuf, 0, sizeof (struct stat));
197 memset (&cwdbuf, 0, sizeof (struct stat));
201 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
202 if (stat (homeinit, &homebuf) != 0)
209 if (stat (gdbinit, &cwdbuf) == 0)
212 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
213 sizeof (struct stat)))
220 *system_gdbinit = sysgdbinit;
221 *home_gdbinit = homeinit;
222 *local_gdbinit = localinit;
225 /* Call command_loop. If it happens to return, pass that through as a
226 non-zero return status. */
229 captured_command_loop (void *data)
231 /* Top-level execution commands can be run on the background from
233 interpreter_async = 1;
235 current_interp_command_loop ();
236 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
237 would clean things up (restoring the cleanup chain) to the state
238 they were just prior to the call. Technically, this means that
239 the do_cleanups() below is redundant. Unfortunately, many FUNCs
240 are not that well behaved. do_cleanups should either be replaced
241 with a do_cleanups call (to cover the problem) or an assertion
242 check to detect bad FUNCs code. */
243 do_cleanups (ALL_CLEANUPS);
244 /* If the command_loop returned, normally (rather than threw an
245 error) we try to quit. If the quit is aborted, catch_errors()
246 which called this catch the signal and restart the command
248 quit_command (NULL, instream == stdin);
253 captured_main (void *data)
255 struct captured_main_args *context = data;
256 int argc = context->argc;
257 char **argv = context->argv;
258 static int quiet = 0;
259 static int set_args = 0;
261 /* Pointers to various arguments from command line. */
263 char *execarg = NULL;
265 char *corearg = NULL;
266 char *pid_or_core_arg = NULL;
270 /* These are static so that we can take their address in an
272 static int print_help;
273 static int print_version;
275 /* Pointers to all arguments of --command option. */
283 /* Allocated size of cmdarg. */
285 /* Number of elements of cmdarg used. */
288 /* Indices of all arguments of --directory option. */
290 /* Allocated size. */
292 /* Number of elements used. */
295 /* gdb init files. */
296 char *system_gdbinit;
302 struct objfile *objfile;
304 struct cleanup *pre_stat_chain;
307 /* Set this before calling make_command_stats_cleanup. */
308 lim_at_start = (char *) sbrk (0);
311 pre_stat_chain = make_command_stats_cleanup (0);
313 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
314 setlocale (LC_MESSAGES, "");
316 #if defined (HAVE_SETLOCALE)
317 setlocale (LC_CTYPE, "");
319 bindtextdomain (PACKAGE, LOCALEDIR);
320 textdomain (PACKAGE);
323 cmdarg = (struct cmdarg *) xmalloc (cmdsize * sizeof (*cmdarg));
326 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
330 saved_command_line = (char *) xmalloc (saved_command_line_size);
331 saved_command_line[0] = '\0';
334 gdb_stdout = stdio_fileopen (stdout);
335 gdb_stderr = stdio_fileopen (stderr);
336 gdb_stdlog = gdb_stderr; /* for moment */
337 gdb_stdtarg = gdb_stderr; /* for moment */
338 gdb_stdin = stdio_fileopen (stdin);
339 gdb_stdtargerr = gdb_stderr; /* for moment */
340 gdb_stdtargin = gdb_stdin; /* for moment */
342 gdb_program_name = xstrdup (argv[0]);
344 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
345 /* Don't use *_filtered or warning() (which relies on
346 current_target) until after initialize_all_files(). */
347 fprintf_unfiltered (gdb_stderr,
348 _("%s: warning: error finding "
349 "working directory: %s\n"),
350 argv[0], safe_strerror (errno));
352 current_directory = gdb_dirbuf;
354 /* Set the sysroot path. */
355 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
356 TARGET_SYSTEM_ROOT_RELOCATABLE);
358 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
359 DEBUGDIR_RELOCATABLE);
361 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
362 GDB_DATADIR_RELOCATABLE);
364 #ifdef WITH_PYTHON_PATH
366 /* For later use in helping Python find itself. */
367 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
369 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
375 add_substitute_path_rule (RELOC_SRCDIR,
376 make_relative_prefix (argv[0], BINDIR,
380 /* There will always be an interpreter. Either the one passed into
381 this captured main, or one specified by the user at start up, or
382 the console. Initialize the interpreter to the one requested by
384 interpreter_p = xstrdup (context->interpreter_p);
386 /* Parse arguments and options. */
389 /* When var field is 0, use flag field to record the equivalent
390 short option (or arbitrary numbers starting at 10 for those
391 with no equivalent). */
402 static struct option long_options[] =
404 {"tui", no_argument, 0, OPT_TUI},
405 {"xdb", no_argument, &xdb_commands, 1},
406 {"dbx", no_argument, &dbx_commands, 1},
407 {"readnow", no_argument, &readnow_symbol_files, 1},
408 {"r", no_argument, &readnow_symbol_files, 1},
409 {"quiet", no_argument, &quiet, 1},
410 {"q", no_argument, &quiet, 1},
411 {"silent", no_argument, &quiet, 1},
412 {"nx", no_argument, &inhibit_gdbinit, 1},
413 {"n", no_argument, &inhibit_gdbinit, 1},
414 {"batch-silent", no_argument, 0, 'B'},
415 {"batch", no_argument, &batch_flag, 1},
416 {"epoch", no_argument, &epoch_interface, 1},
418 /* This is a synonym for "--annotate=1". --annotate is now
419 preferred, but keep this here for a long time because people
420 will be running emacses which use --fullname. */
421 {"fullname", no_argument, 0, 'f'},
422 {"f", no_argument, 0, 'f'},
424 {"kernel", no_argument, 0, OPT_KGDB},
425 {"annotate", required_argument, 0, OPT_ANNOTATE},
426 {"help", no_argument, &print_help, 1},
427 {"se", required_argument, 0, OPT_SE},
428 {"symbols", required_argument, 0, 's'},
429 {"s", required_argument, 0, 's'},
430 {"exec", required_argument, 0, 'e'},
431 {"e", required_argument, 0, 'e'},
432 {"core", required_argument, 0, 'c'},
433 {"c", required_argument, 0, 'c'},
434 {"pid", required_argument, 0, 'p'},
435 {"p", required_argument, 0, 'p'},
436 {"command", required_argument, 0, 'x'},
437 {"eval-command", required_argument, 0, 'X'},
438 {"version", no_argument, &print_version, 1},
439 {"x", required_argument, 0, 'x'},
440 {"ex", required_argument, 0, 'X'},
442 {"tclcommand", required_argument, 0, 'z'},
443 {"enable-external-editor", no_argument, 0, 'y'},
444 {"editor-command", required_argument, 0, 'w'},
446 {"ui", required_argument, 0, 'i'},
447 {"interpreter", required_argument, 0, 'i'},
448 {"i", required_argument, 0, 'i'},
449 {"directory", required_argument, 0, 'd'},
450 {"d", required_argument, 0, 'd'},
451 {"data-directory", required_argument, 0, 'D'},
452 {"cd", required_argument, 0, OPT_CD},
453 {"tty", required_argument, 0, 't'},
454 {"baud", required_argument, 0, 'b'},
455 {"b", required_argument, 0, 'b'},
456 {"nw", no_argument, NULL, OPT_NOWINDOWS},
457 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
458 {"w", no_argument, NULL, OPT_WINDOWS},
459 {"windows", no_argument, NULL, OPT_WINDOWS},
460 {"statistics", no_argument, 0, OPT_STATISTICS},
461 {"write", no_argument, &write_files, 1},
462 {"args", no_argument, &set_args, 1},
463 {"l", required_argument, 0, 'l'},
464 {"return-child-result", no_argument, &return_child_result, 1},
465 {0, no_argument, 0, 0}
472 c = getopt_long_only (argc, argv, "",
473 long_options, &option_index);
474 if (c == EOF || set_args)
477 /* Long option that takes an argument. */
478 if (c == 0 && long_options[option_index].flag == 0)
479 c = long_options[option_index].val;
484 /* Long option that just sets a flag. */
494 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
495 annotation_level = atoi (optarg);
498 /* Enable the display of both time and space usage. */
499 set_display_time (1);
500 set_display_space (1);
503 /* --tui is equivalent to -i=tui. */
505 xfree (interpreter_p);
506 interpreter_p = xstrdup (INTERP_TUI);
508 fprintf_unfiltered (gdb_stderr,
509 _("%s: TUI mode is not supported\n"),
518 /* FIXME: cagney/2003-03-01: Not sure if this option is
519 actually useful, and if it is, what it should do. */
521 /* --windows is equivalent to -i=insight. */
522 xfree (interpreter_p);
523 interpreter_p = xstrdup (INTERP_INSIGHT);
528 /* -nw is equivalent to -i=console. */
529 xfree (interpreter_p);
530 interpreter_p = xstrdup (INTERP_CONSOLE);
534 annotation_level = 1;
535 /* We have probably been invoked from emacs. Disable
552 cmdarg[ncmd].type = CMDARG_FILE;
553 cmdarg[ncmd++].string = optarg;
557 cmdarg = xrealloc ((char *) cmdarg,
558 cmdsize * sizeof (*cmdarg));
562 cmdarg[ncmd].type = CMDARG_COMMAND;
563 cmdarg[ncmd++].string = optarg;
567 cmdarg = xrealloc ((char *) cmdarg,
568 cmdsize * sizeof (*cmdarg));
572 batch_flag = batch_silent = 1;
573 gdb_stdout = ui_file_new();
577 gdb_datadir = xstrdup (optarg);
582 extern int gdbtk_test (char *);
584 if (!gdbtk_test (optarg))
586 fprintf_unfiltered (gdb_stderr,
587 _("%s: unable to load "
588 "tclcommand file \"%s\""),
595 /* Backwards compatibility only. */
599 external_editor_command = xstrdup (optarg);
604 xfree (interpreter_p);
605 interpreter_p = xstrdup (optarg);
608 dirarg[ndir++] = optarg;
612 dirarg = (char **) xrealloc ((char *) dirarg,
613 dirsize * sizeof (*dirarg));
627 i = strtol (optarg, &p, 0);
628 if (i == 0 && p == optarg)
630 /* Don't use *_filtered or warning() (which relies on
631 current_target) until after initialize_all_files(). */
635 _("warning: could not set baud rate to `%s'.\n"), optarg);
645 i = strtol (optarg, &p, 0);
646 if (i == 0 && p == optarg)
648 /* Don't use *_filtered or warning() (which relies on
649 current_target) until after initialize_all_files(). */
651 fprintf_unfiltered (gdb_stderr,
652 _("warning: could not set "
653 "timeout limit to `%s'.\n"), optarg);
660 fprintf_unfiltered (gdb_stderr,
661 _("Use `%s --help' for a "
662 "complete list of options.\n"),
668 /* If --help or --version, disable window interface. */
669 if (print_help || print_version)
678 /* Initialize all files. Give the interpreter a chance to take
679 control of the console via the deprecated_init_ui_hook (). */
682 /* Now that gdb_init has created the initial inferior, we're in
683 position to set args for that inferior. */
686 /* The remaining options are the command-line options for the
687 inferior. The first one is the sym/exec file, and the rest
691 fprintf_unfiltered (gdb_stderr,
692 _("%s: `--args' specified but "
693 "no program specified\n"),
697 symarg = argv[optind];
698 execarg = argv[optind];
700 set_inferior_args_vector (argc - optind, &argv[optind]);
704 /* OK, that's all the options. */
706 /* The first argument, if specified, is the name of the
710 symarg = argv[optind];
711 execarg = argv[optind];
715 /* If the user hasn't already specified a PID or the name of a
716 core file, then a second optional argument is allowed. If
717 present, this argument should be interpreted as either a
718 PID or a core file, whichever works. */
719 if (pidarg == NULL && corearg == NULL && optind < argc)
721 pid_or_core_arg = argv[optind];
725 /* Any argument left on the command line is unexpected and
726 will be ignored. Inform the user. */
728 fprintf_unfiltered (gdb_stderr,
729 _("Excess command line "
730 "arguments ignored. (%s%s)\n"),
732 (optind == argc - 1) ? "" : " ...");
735 /* Lookup gdbinit files. Note that the gdbinit file name may be
736 overriden during file initialization, so get_init_files should be
737 called after gdb_init. */
738 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
740 /* Do these (and anything which might call wrap_here or *_filtered)
741 after initialize_all_files() but before the interpreter has been
742 installed. Otherwize the help/version messages will be eaten by
743 the interpreter's output handler. */
747 print_gdb_version (gdb_stdout);
749 printf_filtered ("\n");
755 print_gdb_help (gdb_stdout);
756 fputs_unfiltered ("\n", gdb_stdout);
760 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
761 GDB retain the old MI1 interpreter startup behavior. Output the
762 copyright message before the interpreter is installed. That way
763 it isn't encapsulated in MI output. */
764 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
766 /* Print all the junk at the top, with trailing "..." if we are
767 about to read a symbol file (possibly slowly). */
768 print_gdb_version (gdb_stdout);
770 printf_filtered ("..");
772 printf_filtered ("\n");
773 gdb_flush (gdb_stdout); /* Force to screen during slow
777 /* Install the default UI. All the interpreters should have had a
778 look at things by now. Initialize the default interpreter. */
782 struct interp *interp = interp_lookup (interpreter_p);
785 error (_("Interpreter `%s' unrecognized"), interpreter_p);
787 if (!interp_set (interp, 1))
789 fprintf_unfiltered (gdb_stderr,
790 "Interpreter `%s' failed to initialize.\n",
796 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
797 GDB retain the old MI1 interpreter startup behavior. Output the
798 copyright message after the interpreter is installed when it is
799 any sane interpreter. */
800 if (!quiet && !current_interp_named_p (INTERP_MI1))
802 /* Print all the junk at the top, with trailing "..." if we are
803 about to read a symbol file (possibly slowly). */
804 print_gdb_version (gdb_stdout);
806 printf_filtered ("..");
808 printf_filtered ("\n");
809 gdb_flush (gdb_stdout); /* Force to screen during slow
813 /* Set off error and warning messages with a blank line. */
814 error_pre_print = "\n";
815 quit_pre_print = error_pre_print;
816 warning_pre_print = _("\nwarning: ");
818 /* Read and execute the system-wide gdbinit file, if it exists.
819 This is done *before* all the command line arguments are
820 processed; it sets global parameters, which are independent of
821 what file you are debugging or what directory you are in. */
822 if (system_gdbinit && !inhibit_gdbinit)
823 catch_command_errors (source_script, system_gdbinit, 0, RETURN_MASK_ALL);
825 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
826 *before* all the command line arguments are processed; it sets
827 global parameters, which are independent of what file you are
828 debugging or what directory you are in. */
830 if (home_gdbinit && !inhibit_gdbinit)
831 catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL);
833 /* Now perform all the actions indicated by the arguments. */
836 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
839 for (i = 0; i < ndir; i++)
840 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
843 /* Skip auto-loading section-specified scripts until we've sourced
844 local_gdbinit (which is often used to augment the source search
846 save_auto_load = gdbpy_global_auto_load;
847 gdbpy_global_auto_load = 0;
851 && strcmp (execarg, symarg) == 0)
853 /* The exec file and the symbol-file are the same. If we can't
854 open it, better only print one error message.
855 catch_command_errors returns non-zero on success! */
856 if (catch_command_errors (exec_file_attach, execarg,
857 !batch_flag, RETURN_MASK_ALL))
858 catch_command_errors (symbol_file_add_main, symarg,
859 !batch_flag, RETURN_MASK_ALL);
864 catch_command_errors (exec_file_attach, execarg,
865 !batch_flag, RETURN_MASK_ALL);
867 catch_command_errors (symbol_file_add_main, symarg,
868 !batch_flag, RETURN_MASK_ALL);
871 if (corearg && pidarg)
872 error (_("Can't attach to process and specify "
873 "a core file at the same time."));
876 catch_command_errors (core_file_command, corearg,
877 !batch_flag, RETURN_MASK_ALL);
878 else if (pidarg != NULL)
879 catch_command_errors (attach_command, pidarg,
880 !batch_flag, RETURN_MASK_ALL);
881 else if (pid_or_core_arg)
883 /* The user specified 'gdb program pid' or gdb program core'.
884 If pid_or_core_arg's first character is a digit, try attach
885 first and then corefile. Otherwise try just corefile. */
887 if (isdigit (pid_or_core_arg[0]))
889 if (catch_command_errors (attach_command, pid_or_core_arg,
890 !batch_flag, RETURN_MASK_ALL) == 0)
891 catch_command_errors (core_file_command, pid_or_core_arg,
892 !batch_flag, RETURN_MASK_ALL);
894 else /* Can't be a pid, better be a corefile. */
895 catch_command_errors (core_file_command, pid_or_core_arg,
896 !batch_flag, RETURN_MASK_ALL);
900 set_inferior_io_terminal (ttyarg);
902 /* Error messages should no longer be distinguished with extra output. */
903 error_pre_print = NULL;
904 quit_pre_print = NULL;
905 warning_pre_print = _("warning: ");
907 /* Read the .gdbinit file in the current directory, *if* it isn't
908 the same as the $HOME/.gdbinit file (it should exist, also). */
909 if (local_gdbinit && !inhibit_gdbinit)
910 catch_command_errors (source_script, local_gdbinit, 0, RETURN_MASK_ALL);
912 /* Now that all .gdbinit's have been read and all -d options have been
913 processed, we can read any scripts mentioned in SYMARG.
914 We wait until now because it is common to add to the source search
915 path in local_gdbinit. */
916 gdbpy_global_auto_load = save_auto_load;
917 ALL_OBJFILES (objfile)
918 load_auto_scripts_for_objfile (objfile);
920 for (i = 0; i < ncmd; i++)
922 if (cmdarg[i].type == CMDARG_FILE)
923 catch_command_errors (source_script, cmdarg[i].string,
924 !batch_flag, RETURN_MASK_ALL);
925 else /* cmdarg[i].type == CMDARG_COMMAND */
926 catch_command_errors (execute_command, cmdarg[i].string,
927 !batch_flag, RETURN_MASK_ALL);
931 /* Read in the old history after all the command files have been
937 /* We have hit the end of the batch file. */
938 quit_force (NULL, 0);
941 /* Show time and/or space usage. */
942 do_cleanups (pre_stat_chain);
944 /* NOTE: cagney/1999-11-07: There is probably no reason for not
945 moving this loop and the code found in captured_command_loop()
946 into the command_loop() proper. The main thing holding back that
947 change - SET_TOP_LEVEL() - has been eliminated. */
950 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
952 /* No exit -- exit is through quit_command. */
956 gdb_main (struct captured_main_args *args)
959 use_windows = args->use_windows;
960 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
961 /* The only way to end up here is by an error (normal exit is
962 handled by quit_force()), hence always return an error status. */
967 /* Don't use *_filtered for printing help. We don't want to prompt
968 for continue no matter how small the screen or how much we're going
972 print_gdb_help (struct ui_file *stream)
974 char *system_gdbinit;
978 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
980 fputs_unfiltered (_("\
981 This is the GNU debugger. Usage:\n\n\
982 gdb [options] [executable-file [core-file or process-id]]\n\
983 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
986 fputs_unfiltered (_("\
987 --args Arguments after executable-file are passed to inferior\n\
989 fputs_unfiltered (_("\
990 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
991 --batch Exit after processing options.\n\
992 --batch-silent As for --batch, but suppress all gdb stdout output.\n\
993 --return-child-result\n\
994 GDB exit code will be the child's exit code.\n\
995 --cd=DIR Change current directory to DIR.\n\
996 --command=FILE, -x Execute GDB commands from FILE.\n\
997 --eval-command=COMMAND, -ex\n\
998 Execute a single GDB command.\n\
999 May be used multiple times and in conjunction\n\
1001 --core=COREFILE Analyze the core dump COREFILE.\n\
1002 --pid=PID Attach to running process PID.\n\
1004 fputs_unfiltered (_("\
1005 --dbx DBX compatibility mode.\n\
1006 --directory=DIR Search for source files in DIR.\n\
1007 --epoch Output information used by epoch emacs-GDB interface.\n\
1008 --exec=EXECFILE Use EXECFILE as the executable.\n\
1009 --fullname Output information used by emacs-GDB interface.\n\
1010 --help Print this message.\n\
1012 fputs_unfiltered (_("\
1013 --interpreter=INTERP\n\
1014 Select a specific interpreter / user interface\n\
1016 fputs_unfiltered (_("\
1017 -l TIMEOUT Set timeout in seconds for remote debugging.\n\
1018 --nw Do not use a window interface.\n\
1019 --nx Do not read "), stream);
1020 fputs_unfiltered (gdbinit, stream);
1021 fputs_unfiltered (_(" file.\n\
1022 --quiet Do not print version number on startup.\n\
1023 --readnow Fully read symbol files on first access.\n\
1025 fputs_unfiltered (_("\
1026 --se=FILE Use FILE as symbol file and executable file.\n\
1027 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1028 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1031 fputs_unfiltered (_("\
1032 --tui Use a terminal user interface.\n\
1035 fputs_unfiltered (_("\
1036 --version Print version information and then exit.\n\
1037 -w Use a window interface.\n\
1038 --write Set writing into executable and core files.\n\
1039 --xdb XDB compatibility mode.\n\
1041 fputs_unfiltered (_("\n\
1042 At startup, GDB reads the following init files and executes their commands:\n\
1045 fprintf_unfiltered (stream, _("\
1046 * system-wide init file: %s\n\
1047 "), system_gdbinit);
1049 fprintf_unfiltered (stream, _("\
1050 * user-specific init file: %s\n\
1053 fprintf_unfiltered (stream, _("\
1054 * local init file: ./%s\n\
1056 fputs_unfiltered (_("\n\
1057 For more information, type \"help\" from within GDB, or consult the\n\
1058 GDB manual (available as on-line info or a printed manual).\n\
1060 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1061 fprintf_unfiltered (stream, _("\
1062 Report bugs to \"%s\".\n\
1063 "), REPORT_BUGS_TO);