1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2014 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>
33 #include "event-loop.h"
39 #include "cli/cli-cmds.h"
41 #include "auto-load.h"
44 #include "filenames.h"
45 #include "filestuff.h"
47 #include "event-top.h"
50 /* The selected interpreter. This will be used as a set command
51 variable, so it should always be malloc'ed - since
52 do_setshow_command will free it. */
55 /* Whether xdb commands will be handled. */
58 /* Whether dbx commands will be handled. */
61 /* System root path, used to find libraries etc. */
62 char *gdb_sysroot = 0;
64 /* GDB datadir, used to store data files. */
65 char *gdb_datadir = 0;
67 /* Non-zero if GDB_DATADIR was provided on the command line.
68 This doesn't track whether data-directory is set later from the
69 command line, but we don't reread system.gdbinit when that happens. */
70 static int gdb_datadir_provided = 0;
72 /* If gdb was configured with --with-python=/path,
73 the possibly relocated path to python's lib directory. */
74 char *python_libdir = 0;
76 struct ui_file *gdb_stdout;
77 struct ui_file *gdb_stderr;
78 struct ui_file *gdb_stdlog;
79 struct ui_file *gdb_stdin;
80 /* Target IO streams. */
81 struct ui_file *gdb_stdtargin;
82 struct ui_file *gdb_stdtarg;
83 struct ui_file *gdb_stdtargerr;
85 /* True if --batch or --batch-silent was seen. */
88 /* Support for the --batch-silent option. */
91 /* Support for --return-child-result option.
92 Set the default to -1 to return error in the case
93 that the program does not run or does not complete. */
94 int return_child_result = 0;
95 int return_child_result_value = -1;
98 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
99 static char *gdb_program_name;
101 /* Return read only pointer to GDB_PROGRAM_NAME. */
103 get_gdb_program_name (void)
105 return gdb_program_name;
108 static void print_gdb_help (struct ui_file *);
110 /* Set the data-directory parameter to NEW_DATADIR.
111 If NEW_DATADIR is not a directory then a warning is printed.
112 We don't signal an error for backward compatibility. */
115 set_gdb_data_directory (const char *new_datadir)
119 if (stat (new_datadir, &st) < 0)
121 int save_errno = errno;
123 fprintf_unfiltered (gdb_stderr, "Warning: ");
124 print_sys_errmsg (new_datadir, save_errno);
126 else if (!S_ISDIR (st.st_mode))
127 warning (_("%s is not a directory."), new_datadir);
130 gdb_datadir = gdb_realpath (new_datadir);
132 /* gdb_realpath won't return an absolute path if the path doesn't exist,
133 but we still want to record an absolute path here. If the user entered
134 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
135 isn't canonical, but that's ok. */
136 if (!IS_ABSOLUTE_PATH (gdb_datadir))
138 char *abs_datadir = gdb_abspath (gdb_datadir);
141 gdb_datadir = abs_datadir;
145 /* Relocate a file or directory. PROGNAME is the name by which gdb
146 was invoked (i.e., argv[0]). INITIAL is the default value for the
147 file or directory. FLAG is true if the value is relocatable, false
148 otherwise. Returns a newly allocated string; this may return NULL
149 under the same conditions as make_relative_prefix. */
152 relocate_path (const char *progname, const char *initial, int flag)
155 return make_relative_prefix (progname, BINDIR, initial);
156 return xstrdup (initial);
159 /* Like relocate_path, but specifically checks for a directory.
160 INITIAL is relocated according to the rules of relocate_path. If
161 the result is a directory, it is used; otherwise, INITIAL is used.
162 The chosen directory is then canonicalized using lrealpath. This
163 function always returns a newly-allocated string. */
166 relocate_gdb_directory (const char *initial, int flag)
170 dir = relocate_path (gdb_program_name, initial, flag);
175 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
182 dir = xstrdup (initial);
184 /* Canonicalize the directory. */
187 char *canon_sysroot = lrealpath (dir);
199 /* Compute the locations of init files that GDB should source and
200 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
201 there is no system gdbinit (resp. home gdbinit and local gdbinit)
202 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
203 LOCAL_GDBINIT) is set to NULL. */
205 get_init_files (const char **system_gdbinit,
206 const char **home_gdbinit,
207 const char **local_gdbinit)
209 static const char *sysgdbinit = NULL;
210 static char *homeinit = NULL;
211 static const char *localinit = NULL;
212 static int initialized = 0;
216 struct stat homebuf, cwdbuf, s;
219 if (SYSTEM_GDBINIT[0])
221 int datadir_len = strlen (GDB_DATADIR);
222 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
223 char *relocated_sysgdbinit;
225 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
226 has been provided, search for SYSTEM_GDBINIT there. */
227 if (gdb_datadir_provided
228 && datadir_len < sys_gdbinit_len
229 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
230 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
232 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
234 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
237 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
239 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
241 xfree (tmp_sys_gdbinit);
245 relocated_sysgdbinit = relocate_path (gdb_program_name,
247 SYSTEM_GDBINIT_RELOCATABLE);
249 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
250 sysgdbinit = relocated_sysgdbinit;
252 xfree (relocated_sysgdbinit);
255 homedir = getenv ("HOME");
257 /* If the .gdbinit file in the current directory is the same as
258 the $HOME/.gdbinit file, it should not be sourced. homebuf
259 and cwdbuf are used in that purpose. Make sure that the stats
260 are zero in case one of them fails (this guarantees that they
261 won't match if either exists). */
263 memset (&homebuf, 0, sizeof (struct stat));
264 memset (&cwdbuf, 0, sizeof (struct stat));
268 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
269 if (stat (homeinit, &homebuf) != 0)
276 if (stat (gdbinit, &cwdbuf) == 0)
279 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
280 sizeof (struct stat)))
287 *system_gdbinit = sysgdbinit;
288 *home_gdbinit = homeinit;
289 *local_gdbinit = localinit;
292 /* Try to set up an alternate signal stack for SIGSEGV handlers.
293 This allows us to handle SIGSEGV signals generated when the
294 normal process stack is exhausted. If this stack is not set
295 up (sigaltstack is unavailable or fails) and a SIGSEGV is
296 generated when the normal stack is exhausted then the program
297 will behave as though no SIGSEGV handler was installed. */
300 setup_alternate_signal_stack (void)
302 #ifdef HAVE_SIGALTSTACK
305 ss.ss_sp = xmalloc (SIGSTKSZ);
306 ss.ss_size = SIGSTKSZ;
309 sigaltstack(&ss, NULL);
313 /* Call command_loop. If it happens to return, pass that through as a
314 non-zero return status. */
317 captured_command_loop (void *data)
319 /* Top-level execution commands can be run in the background from
321 interpreter_async = 1;
323 current_interp_command_loop ();
324 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
325 would clean things up (restoring the cleanup chain) to the state
326 they were just prior to the call. Technically, this means that
327 the do_cleanups() below is redundant. Unfortunately, many FUNCs
328 are not that well behaved. do_cleanups should either be replaced
329 with a do_cleanups call (to cover the problem) or an assertion
330 check to detect bad FUNCs code. */
331 do_cleanups (all_cleanups ());
332 /* If the command_loop returned, normally (rather than threw an
333 error) we try to quit. If the quit is aborted, catch_errors()
334 which called this catch the signal and restart the command
336 quit_command (NULL, instream == stdin);
340 /* Handle command errors thrown from within
341 catch_command_errors/catch_command_errors_const. */
344 handle_command_errors (volatile struct gdb_exception e)
348 exception_print (gdb_stderr, e);
350 /* If any exception escaped to here, we better enable stdin.
351 Otherwise, any command that calls async_disable_stdin, and
352 then throws, will leave stdin inoperable. */
353 async_enable_stdin ();
359 /* Type of the command callback passed to catch_command_errors. */
361 typedef void (catch_command_errors_ftype) (char *, int);
363 /* Wrap calls to commands run before the event loop is started. */
366 catch_command_errors (catch_command_errors_ftype *command,
367 char *arg, int from_tty, return_mask mask)
369 volatile struct gdb_exception e;
373 int was_sync = sync_execution;
375 command (arg, from_tty);
377 maybe_wait_sync_command_done (was_sync);
379 return handle_command_errors (e);
382 /* Type of the command callback passed to catch_command_errors_const. */
384 typedef void (catch_command_errors_const_ftype) (const char *, int);
386 /* Like catch_command_errors, but works with const command and args. */
389 catch_command_errors_const (catch_command_errors_const_ftype *command,
390 const char *arg, int from_tty, return_mask mask)
392 volatile struct gdb_exception e;
396 int was_sync = sync_execution;
398 command (arg, from_tty);
400 maybe_wait_sync_command_done (was_sync);
402 return handle_command_errors (e);
405 /* Arguments of --command option and its counterpart. */
406 typedef struct cmdarg {
407 /* Type of this option. */
409 /* Option type -x. */
412 /* Option type -ex. */
415 /* Option type -ix. */
418 /* Option type -iex. */
422 /* Value of this option - filename or the GDB command itself. String memory
423 is not owned by this structure despite it is 'const'. */
427 /* Define type VEC (cmdarg_s). */
428 DEF_VEC_O (cmdarg_s);
431 captured_main (void *data)
433 struct captured_main_args *context = data;
434 int argc = context->argc;
435 char **argv = context->argv;
436 static int quiet = 0;
437 static int set_args = 0;
438 static int inhibit_home_gdbinit = 0;
440 /* Pointers to various arguments from command line. */
442 char *execarg = NULL;
444 char *corearg = NULL;
445 char *pid_or_core_arg = NULL;
449 /* These are static so that we can take their address in an
451 static int print_help;
452 static int print_version;
453 static int print_configuration;
455 /* Pointers to all arguments of --command option. */
456 VEC (cmdarg_s) *cmdarg_vec = NULL;
457 struct cmdarg *cmdarg_p;
459 /* Indices of all arguments of --directory option. */
461 /* Allocated size. */
463 /* Number of elements used. */
466 /* gdb init files. */
467 const char *system_gdbinit;
468 const char *home_gdbinit;
469 const char *local_gdbinit;
473 struct objfile *objfile;
475 struct cleanup *pre_stat_chain;
478 /* Set this before calling make_command_stats_cleanup. */
479 lim_at_start = (char *) sbrk (0);
482 pre_stat_chain = make_command_stats_cleanup (0);
484 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
485 setlocale (LC_MESSAGES, "");
487 #if defined (HAVE_SETLOCALE)
488 setlocale (LC_CTYPE, "");
490 bindtextdomain (PACKAGE, LOCALEDIR);
491 textdomain (PACKAGE);
496 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
498 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
502 saved_command_line = (char *) xmalloc (saved_command_line_size);
503 saved_command_line[0] = '\0';
507 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
508 as a Windows pipe, and Windows buffers on pipes. */
509 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
512 gdb_stdout = stdio_fileopen (stdout);
513 gdb_stderr = stderr_fileopen ();
515 gdb_stdlog = gdb_stderr; /* for moment */
516 gdb_stdtarg = gdb_stderr; /* for moment */
517 gdb_stdin = stdio_fileopen (stdin);
518 gdb_stdtargerr = gdb_stderr; /* for moment */
519 gdb_stdtargin = gdb_stdin; /* for moment */
522 /* On Windows, argv[0] is not necessarily set to absolute form when
523 GDB is found along PATH, without which relocation doesn't work. */
524 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
526 gdb_program_name = xstrdup (argv[0]);
529 /* Prefix warning messages with the command name. */
530 warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
532 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
533 perror_warning_with_name (_("error finding working directory"));
535 current_directory = gdb_dirbuf;
537 /* Set the sysroot path. */
538 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
539 TARGET_SYSTEM_ROOT_RELOCATABLE);
541 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
542 DEBUGDIR_RELOCATABLE);
544 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
545 GDB_DATADIR_RELOCATABLE);
547 #ifdef WITH_PYTHON_PATH
549 /* For later use in helping Python find itself. */
550 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
552 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
558 add_substitute_path_rule (RELOC_SRCDIR,
559 make_relative_prefix (gdb_program_name, BINDIR,
563 /* There will always be an interpreter. Either the one passed into
564 this captured main, or one specified by the user at start up, or
565 the console. Initialize the interpreter to the one requested by
567 interpreter_p = xstrdup (context->interpreter_p);
569 /* Parse arguments and options. */
572 /* When var field is 0, use flag field to record the equivalent
573 short option (or arbitrary numbers starting at 10 for those
574 with no equivalent). */
586 static struct option long_options[] =
588 {"tui", no_argument, 0, OPT_TUI},
589 {"xdb", no_argument, &xdb_commands, 1},
590 {"dbx", no_argument, &dbx_commands, 1},
591 {"readnow", no_argument, &readnow_symbol_files, 1},
592 {"r", no_argument, &readnow_symbol_files, 1},
593 {"quiet", no_argument, &quiet, 1},
594 {"q", no_argument, &quiet, 1},
595 {"silent", no_argument, &quiet, 1},
596 {"nh", no_argument, &inhibit_home_gdbinit, 1},
597 {"nx", no_argument, &inhibit_gdbinit, 1},
598 {"n", no_argument, &inhibit_gdbinit, 1},
599 {"batch-silent", no_argument, 0, 'B'},
600 {"batch", no_argument, &batch_flag, 1},
602 /* This is a synonym for "--annotate=1". --annotate is now
603 preferred, but keep this here for a long time because people
604 will be running emacses which use --fullname. */
605 {"fullname", no_argument, 0, 'f'},
606 {"f", no_argument, 0, 'f'},
608 {"annotate", required_argument, 0, OPT_ANNOTATE},
609 {"help", no_argument, &print_help, 1},
610 {"se", required_argument, 0, OPT_SE},
611 {"symbols", required_argument, 0, 's'},
612 {"s", required_argument, 0, 's'},
613 {"exec", required_argument, 0, 'e'},
614 {"e", required_argument, 0, 'e'},
615 {"core", required_argument, 0, 'c'},
616 {"c", required_argument, 0, 'c'},
617 {"pid", required_argument, 0, 'p'},
618 {"p", required_argument, 0, 'p'},
619 {"command", required_argument, 0, 'x'},
620 {"eval-command", required_argument, 0, 'X'},
621 {"version", no_argument, &print_version, 1},
622 {"configuration", no_argument, &print_configuration, 1},
623 {"x", required_argument, 0, 'x'},
624 {"ex", required_argument, 0, 'X'},
625 {"init-command", required_argument, 0, OPT_IX},
626 {"init-eval-command", required_argument, 0, OPT_IEX},
627 {"ix", required_argument, 0, OPT_IX},
628 {"iex", required_argument, 0, OPT_IEX},
630 {"tclcommand", required_argument, 0, 'z'},
631 {"enable-external-editor", no_argument, 0, 'y'},
632 {"editor-command", required_argument, 0, 'w'},
634 {"ui", required_argument, 0, 'i'},
635 {"interpreter", required_argument, 0, 'i'},
636 {"i", required_argument, 0, 'i'},
637 {"directory", required_argument, 0, 'd'},
638 {"d", required_argument, 0, 'd'},
639 {"data-directory", required_argument, 0, 'D'},
640 {"D", required_argument, 0, 'D'},
641 {"cd", required_argument, 0, OPT_CD},
642 {"tty", required_argument, 0, 't'},
643 {"baud", required_argument, 0, 'b'},
644 {"b", required_argument, 0, 'b'},
645 {"nw", no_argument, NULL, OPT_NOWINDOWS},
646 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
647 {"w", no_argument, NULL, OPT_WINDOWS},
648 {"windows", no_argument, NULL, OPT_WINDOWS},
649 {"statistics", no_argument, 0, OPT_STATISTICS},
650 {"write", no_argument, &write_files, 1},
651 {"args", no_argument, &set_args, 1},
652 {"l", required_argument, 0, 'l'},
653 {"return-child-result", no_argument, &return_child_result, 1},
654 {0, no_argument, 0, 0}
661 c = getopt_long_only (argc, argv, "",
662 long_options, &option_index);
663 if (c == EOF || set_args)
666 /* Long option that takes an argument. */
667 if (c == 0 && long_options[option_index].flag == 0)
668 c = long_options[option_index].val;
673 /* Long option that just sets a flag. */
683 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
684 annotation_level = atoi (optarg);
687 /* Enable the display of both time and space usage. */
688 set_per_command_time (1);
689 set_per_command_space (1);
692 /* --tui is equivalent to -i=tui. */
694 xfree (interpreter_p);
695 interpreter_p = xstrdup (INTERP_TUI);
697 error (_("%s: TUI mode is not supported"), gdb_program_name);
701 /* FIXME: cagney/2003-03-01: Not sure if this option is
702 actually useful, and if it is, what it should do. */
704 /* --windows is equivalent to -i=insight. */
705 xfree (interpreter_p);
706 interpreter_p = xstrdup (INTERP_INSIGHT);
710 /* -nw is equivalent to -i=console. */
711 xfree (interpreter_p);
712 interpreter_p = xstrdup (INTERP_CONSOLE);
715 annotation_level = 1;
731 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
733 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
738 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
740 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
745 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
747 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
752 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
754 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
758 batch_flag = batch_silent = 1;
759 gdb_stdout = ui_file_new();
762 if (optarg[0] == '\0')
763 error (_("%s: empty path for `--data-directory'"),
765 set_gdb_data_directory (optarg);
766 gdb_datadir_provided = 1;
771 extern int gdbtk_test (char *);
773 if (!gdbtk_test (optarg))
774 error (_("%s: unable to load tclcommand file \"%s\""),
775 gdb_program_name, optarg);
779 /* Backwards compatibility only. */
783 /* Set the external editor commands when gdb is farming out files
784 to be edited by another program. */
785 extern char *external_editor_command;
787 external_editor_command = xstrdup (optarg);
792 xfree (interpreter_p);
793 interpreter_p = xstrdup (optarg);
796 dirarg[ndir++] = optarg;
800 dirarg = (char **) xrealloc ((char *) dirarg,
801 dirsize * sizeof (*dirarg));
815 i = strtol (optarg, &p, 0);
816 if (i == 0 && p == optarg)
817 warning (_("could not set baud rate to `%s'."),
828 i = strtol (optarg, &p, 0);
829 if (i == 0 && p == optarg)
830 warning (_("could not set timeout limit to `%s'."),
838 error (_("Use `%s --help' for a complete list of options."),
847 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
848 setup_alternate_signal_stack ();
850 /* Initialize all files. Give the interpreter a chance to take
851 control of the console via the deprecated_init_ui_hook (). */
852 gdb_init (gdb_program_name);
854 /* Now that gdb_init has created the initial inferior, we're in
855 position to set args for that inferior. */
858 /* The remaining options are the command-line options for the
859 inferior. The first one is the sym/exec file, and the rest
862 error (_("%s: `--args' specified but no program specified"),
865 symarg = argv[optind];
866 execarg = argv[optind];
868 set_inferior_args_vector (argc - optind, &argv[optind]);
872 /* OK, that's all the options. */
874 /* The first argument, if specified, is the name of the
878 symarg = argv[optind];
879 execarg = argv[optind];
883 /* If the user hasn't already specified a PID or the name of a
884 core file, then a second optional argument is allowed. If
885 present, this argument should be interpreted as either a
886 PID or a core file, whichever works. */
887 if (pidarg == NULL && corearg == NULL && optind < argc)
889 pid_or_core_arg = argv[optind];
893 /* Any argument left on the command line is unexpected and
894 will be ignored. Inform the user. */
896 fprintf_unfiltered (gdb_stderr,
897 _("Excess command line "
898 "arguments ignored. (%s%s)\n"),
900 (optind == argc - 1) ? "" : " ...");
903 /* Lookup gdbinit files. Note that the gdbinit file name may be
904 overriden during file initialization, so get_init_files should be
905 called after gdb_init. */
906 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
908 /* Do these (and anything which might call wrap_here or *_filtered)
909 after initialize_all_files() but before the interpreter has been
910 installed. Otherwize the help/version messages will be eaten by
911 the interpreter's output handler. */
915 print_gdb_version (gdb_stdout);
917 printf_filtered ("\n");
923 print_gdb_help (gdb_stdout);
924 fputs_unfiltered ("\n", gdb_stdout);
928 if (print_configuration)
930 print_gdb_configuration (gdb_stdout);
932 printf_filtered ("\n");
936 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
937 GDB retain the old MI1 interpreter startup behavior. Output the
938 copyright message before the interpreter is installed. That way
939 it isn't encapsulated in MI output. */
940 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
942 /* Print all the junk at the top, with trailing "..." if we are
943 about to read a symbol file (possibly slowly). */
944 print_gdb_version (gdb_stdout);
946 printf_filtered ("..");
948 printf_filtered ("\n");
949 gdb_flush (gdb_stdout); /* Force to screen during slow
953 /* Install the default UI. All the interpreters should have had a
954 look at things by now. Initialize the default interpreter. */
958 struct interp *interp = interp_lookup (interpreter_p);
961 error (_("Interpreter `%s' unrecognized"), interpreter_p);
963 if (!interp_set (interp, 1))
964 error (_("Interpreter `%s' failed to initialize."), interpreter_p);
967 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
968 GDB retain the old MI1 interpreter startup behavior. Output the
969 copyright message after the interpreter is installed when it is
970 any sane interpreter. */
971 if (!quiet && !current_interp_named_p (INTERP_MI1))
973 /* Print all the junk at the top, with trailing "..." if we are
974 about to read a symbol file (possibly slowly). */
975 print_gdb_version (gdb_stdout);
977 printf_filtered ("..");
979 printf_filtered ("\n");
980 gdb_flush (gdb_stdout); /* Force to screen during slow
984 /* Set off error and warning messages with a blank line. */
985 xfree (warning_pre_print);
986 warning_pre_print = _("\nwarning: ");
988 /* Read and execute the system-wide gdbinit file, if it exists.
989 This is done *before* all the command line arguments are
990 processed; it sets global parameters, which are independent of
991 what file you are debugging or what directory you are in. */
992 if (system_gdbinit && !inhibit_gdbinit)
993 catch_command_errors_const (source_script, system_gdbinit,
996 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
997 *before* all the command line arguments are processed; it sets
998 global parameters, which are independent of what file you are
999 debugging or what directory you are in. */
1001 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
1002 catch_command_errors_const (source_script,
1003 home_gdbinit, 0, RETURN_MASK_ALL);
1005 /* Process '-ix' and '-iex' options early. */
1006 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1007 switch (cmdarg_p->type)
1009 case CMDARG_INIT_FILE:
1010 catch_command_errors_const (source_script, cmdarg_p->string,
1011 !batch_flag, RETURN_MASK_ALL);
1013 case CMDARG_INIT_COMMAND:
1014 catch_command_errors (execute_command, cmdarg_p->string,
1015 !batch_flag, RETURN_MASK_ALL);
1019 /* Now perform all the actions indicated by the arguments. */
1022 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
1025 for (i = 0; i < ndir; i++)
1026 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
1029 /* Skip auto-loading section-specified scripts until we've sourced
1030 local_gdbinit (which is often used to augment the source search
1032 save_auto_load = global_auto_load;
1033 global_auto_load = 0;
1037 && strcmp (execarg, symarg) == 0)
1039 /* The exec file and the symbol-file are the same. If we can't
1040 open it, better only print one error message.
1041 catch_command_errors returns non-zero on success! */
1042 if (catch_command_errors_const (exec_file_attach, execarg,
1043 !batch_flag, RETURN_MASK_ALL))
1044 catch_command_errors_const (symbol_file_add_main, symarg,
1045 !batch_flag, RETURN_MASK_ALL);
1049 if (execarg != NULL)
1050 catch_command_errors_const (exec_file_attach, execarg,
1051 !batch_flag, RETURN_MASK_ALL);
1053 catch_command_errors_const (symbol_file_add_main, symarg,
1054 !batch_flag, RETURN_MASK_ALL);
1057 if (corearg && pidarg)
1058 error (_("Can't attach to process and specify "
1059 "a core file at the same time."));
1061 if (corearg != NULL)
1062 catch_command_errors (core_file_command, corearg,
1063 !batch_flag, RETURN_MASK_ALL);
1064 else if (pidarg != NULL)
1065 catch_command_errors (attach_command, pidarg,
1066 !batch_flag, RETURN_MASK_ALL);
1067 else if (pid_or_core_arg)
1069 /* The user specified 'gdb program pid' or gdb program core'.
1070 If pid_or_core_arg's first character is a digit, try attach
1071 first and then corefile. Otherwise try just corefile. */
1073 if (isdigit (pid_or_core_arg[0]))
1075 if (catch_command_errors (attach_command, pid_or_core_arg,
1076 !batch_flag, RETURN_MASK_ALL) == 0)
1077 catch_command_errors (core_file_command, pid_or_core_arg,
1078 !batch_flag, RETURN_MASK_ALL);
1080 else /* Can't be a pid, better be a corefile. */
1081 catch_command_errors (core_file_command, pid_or_core_arg,
1082 !batch_flag, RETURN_MASK_ALL);
1086 set_inferior_io_terminal (ttyarg);
1088 /* Error messages should no longer be distinguished with extra output. */
1089 warning_pre_print = _("warning: ");
1091 /* Read the .gdbinit file in the current directory, *if* it isn't
1092 the same as the $HOME/.gdbinit file (it should exist, also). */
1095 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1097 if (!inhibit_gdbinit && auto_load_local_gdbinit
1098 && file_is_auto_load_safe (local_gdbinit,
1099 _("auto-load: Loading .gdbinit "
1103 auto_load_local_gdbinit_loaded = 1;
1105 catch_command_errors_const (source_script, local_gdbinit, 0,
1110 /* Now that all .gdbinit's have been read and all -d options have been
1111 processed, we can read any scripts mentioned in SYMARG.
1112 We wait until now because it is common to add to the source search
1113 path in local_gdbinit. */
1114 global_auto_load = save_auto_load;
1115 ALL_OBJFILES (objfile)
1116 load_auto_scripts_for_objfile (objfile);
1118 /* Process '-x' and '-ex' options. */
1119 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1120 switch (cmdarg_p->type)
1123 catch_command_errors_const (source_script, cmdarg_p->string,
1124 !batch_flag, RETURN_MASK_ALL);
1126 case CMDARG_COMMAND:
1127 catch_command_errors (execute_command, cmdarg_p->string,
1128 !batch_flag, RETURN_MASK_ALL);
1132 /* Read in the old history after all the command files have been
1138 /* We have hit the end of the batch file. */
1139 quit_force (NULL, 0);
1142 /* Show time and/or space usage. */
1143 do_cleanups (pre_stat_chain);
1145 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1146 moving this loop and the code found in captured_command_loop()
1147 into the command_loop() proper. The main thing holding back that
1148 change - SET_TOP_LEVEL() - has been eliminated. */
1151 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1153 /* No exit -- exit is through quit_command. */
1157 gdb_main (struct captured_main_args *args)
1159 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1160 /* The only way to end up here is by an error (normal exit is
1161 handled by quit_force()), hence always return an error status. */
1166 /* Don't use *_filtered for printing help. We don't want to prompt
1167 for continue no matter how small the screen or how much we're going
1171 print_gdb_help (struct ui_file *stream)
1173 const char *system_gdbinit;
1174 const char *home_gdbinit;
1175 const char *local_gdbinit;
1177 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1179 /* Note: The options in the list below are only approximately sorted
1180 in the alphabetical order, so as to group closely related options
1182 fputs_unfiltered (_("\
1183 This is the GNU debugger. Usage:\n\n\
1184 gdb [options] [executable-file [core-file or process-id]]\n\
1185 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1187 fputs_unfiltered (_("\
1188 Selection of debuggee and its files:\n\n\
1189 --args Arguments after executable-file are passed to inferior\n\
1190 --core=COREFILE Analyze the core dump COREFILE.\n\
1191 --exec=EXECFILE Use EXECFILE as the executable.\n\
1192 --pid=PID Attach to running process PID.\n\
1193 --directory=DIR Search for source files in DIR.\n\
1194 --se=FILE Use FILE as symbol file and executable file.\n\
1195 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1196 --readnow Fully read symbol files on first access.\n\
1197 --write Set writing into executable and core files.\n\n\
1199 fputs_unfiltered (_("\
1200 Initial commands and command files:\n\n\
1201 --command=FILE, -x Execute GDB commands from FILE.\n\
1202 --init-command=FILE, -ix\n\
1203 Like -x but execute commands before loading inferior.\n\
1204 --eval-command=COMMAND, -ex\n\
1205 Execute a single GDB command.\n\
1206 May be used multiple times and in conjunction\n\
1208 --init-eval-command=COMMAND, -iex\n\
1209 Like -ex but before loading inferior.\n\
1210 --nh Do not read ~/.gdbinit.\n\
1211 --nx Do not read any .gdbinit files in any directory.\n\n\
1213 fputs_unfiltered (_("\
1214 Output and user interface control:\n\n\
1215 --fullname Output information used by emacs-GDB interface.\n\
1216 --interpreter=INTERP\n\
1217 Select a specific interpreter / user interface\n\
1218 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1219 -w Use the GUI interface.\n\
1220 --nw Do not use the GUI interface.\n\
1223 fputs_unfiltered (_("\
1224 --tui Use a terminal user interface.\n\
1227 fputs_unfiltered (_("\
1228 --dbx DBX compatibility mode.\n\
1229 --xdb XDB compatibility mode.\n\
1230 -q, --quiet, --silent\n\
1231 Do not print version number on startup.\n\n\
1233 fputs_unfiltered (_("\
1234 Operating modes:\n\n\
1235 --batch Exit after processing options.\n\
1236 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1237 --return-child-result\n\
1238 GDB exit code will be the child's exit code.\n\
1239 --configuration Print details about GDB configuration and then exit.\n\
1240 --help Print this message and then exit.\n\
1241 --version Print version information and then exit.\n\n\
1242 Remote debugging options:\n\n\
1243 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1244 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1246 --cd=DIR Change current directory to DIR.\n\
1247 --data-directory=DIR, -D\n\
1248 Set GDB's data-directory to DIR.\n\
1250 fputs_unfiltered (_("\n\
1251 At startup, GDB reads the following init files and executes their commands:\n\
1254 fprintf_unfiltered (stream, _("\
1255 * system-wide init file: %s\n\
1256 "), system_gdbinit);
1258 fprintf_unfiltered (stream, _("\
1259 * user-specific init file: %s\n\
1262 fprintf_unfiltered (stream, _("\
1263 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1265 fputs_unfiltered (_("\n\
1266 For more information, type \"help\" from within GDB, or consult the\n\
1267 GDB manual (available as on-line info or a printed manual).\n\
1269 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1270 fprintf_unfiltered (stream, _("\
1271 Report bugs to \"%s\".\n\
1272 "), REPORT_BUGS_TO);