1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2015 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/>. */
28 #include <sys/types.h>
31 #include "event-loop.h"
37 #include "cli/cli-cmds.h"
39 #include "auto-load.h"
42 #include "filenames.h"
43 #include "filestuff.h"
45 #include "event-top.h"
48 /* The selected interpreter. This will be used as a set command
49 variable, so it should always be malloc'ed - since
50 do_setshow_command will free it. */
53 /* Whether xdb commands will be handled. */
56 /* Whether dbx commands will be handled. */
59 /* System root path, used to find libraries etc. */
60 char *gdb_sysroot = 0;
62 /* GDB datadir, used to store data files. */
63 char *gdb_datadir = 0;
65 /* Non-zero if GDB_DATADIR was provided on the command line.
66 This doesn't track whether data-directory is set later from the
67 command line, but we don't reread system.gdbinit when that happens. */
68 static int gdb_datadir_provided = 0;
70 /* If gdb was configured with --with-python=/path,
71 the possibly relocated path to python's lib directory. */
72 char *python_libdir = 0;
74 struct ui_file *gdb_stdout;
75 struct ui_file *gdb_stderr;
76 struct ui_file *gdb_stdlog;
77 struct ui_file *gdb_stdin;
78 /* Target IO streams. */
79 struct ui_file *gdb_stdtargin;
80 struct ui_file *gdb_stdtarg;
81 struct ui_file *gdb_stdtargerr;
83 /* True if --batch or --batch-silent was seen. */
86 /* Support for the --batch-silent option. */
89 /* Support for --return-child-result option.
90 Set the default to -1 to return error in the case
91 that the program does not run or does not complete. */
92 int return_child_result = 0;
93 int return_child_result_value = -1;
96 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
97 static char *gdb_program_name;
99 /* Return read only pointer to GDB_PROGRAM_NAME. */
101 get_gdb_program_name (void)
103 return gdb_program_name;
106 static void print_gdb_help (struct ui_file *);
108 /* Set the data-directory parameter to NEW_DATADIR.
109 If NEW_DATADIR is not a directory then a warning is printed.
110 We don't signal an error for backward compatibility. */
113 set_gdb_data_directory (const char *new_datadir)
117 if (stat (new_datadir, &st) < 0)
119 int save_errno = errno;
121 fprintf_unfiltered (gdb_stderr, "Warning: ");
122 print_sys_errmsg (new_datadir, save_errno);
124 else if (!S_ISDIR (st.st_mode))
125 warning (_("%s is not a directory."), new_datadir);
128 gdb_datadir = gdb_realpath (new_datadir);
130 /* gdb_realpath won't return an absolute path if the path doesn't exist,
131 but we still want to record an absolute path here. If the user entered
132 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
133 isn't canonical, but that's ok. */
134 if (!IS_ABSOLUTE_PATH (gdb_datadir))
136 char *abs_datadir = gdb_abspath (gdb_datadir);
139 gdb_datadir = abs_datadir;
143 /* Relocate a file or directory. PROGNAME is the name by which gdb
144 was invoked (i.e., argv[0]). INITIAL is the default value for the
145 file or directory. FLAG is true if the value is relocatable, false
146 otherwise. Returns a newly allocated string; this may return NULL
147 under the same conditions as make_relative_prefix. */
150 relocate_path (const char *progname, const char *initial, int flag)
153 return make_relative_prefix (progname, BINDIR, initial);
154 return xstrdup (initial);
157 /* Like relocate_path, but specifically checks for a directory.
158 INITIAL is relocated according to the rules of relocate_path. If
159 the result is a directory, it is used; otherwise, INITIAL is used.
160 The chosen directory is then canonicalized using lrealpath. This
161 function always returns a newly-allocated string. */
164 relocate_gdb_directory (const char *initial, int flag)
168 dir = relocate_path (gdb_program_name, initial, flag);
173 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
180 dir = xstrdup (initial);
182 /* Canonicalize the directory. */
185 char *canon_sysroot = lrealpath (dir);
197 /* Compute the locations of init files that GDB should source and
198 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
199 there is no system gdbinit (resp. home gdbinit and local gdbinit)
200 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
201 LOCAL_GDBINIT) is set to NULL. */
203 get_init_files (const char **system_gdbinit,
204 const char **home_gdbinit,
205 const char **local_gdbinit)
207 static const char *sysgdbinit = NULL;
208 static char *homeinit = NULL;
209 static const char *localinit = NULL;
210 static int initialized = 0;
214 struct stat homebuf, cwdbuf, s;
217 if (SYSTEM_GDBINIT[0])
219 int datadir_len = strlen (GDB_DATADIR);
220 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
221 char *relocated_sysgdbinit;
223 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
224 has been provided, search for SYSTEM_GDBINIT there. */
225 if (gdb_datadir_provided
226 && datadir_len < sys_gdbinit_len
227 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
228 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
230 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
232 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
235 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
237 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
239 xfree (tmp_sys_gdbinit);
243 relocated_sysgdbinit = relocate_path (gdb_program_name,
245 SYSTEM_GDBINIT_RELOCATABLE);
247 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
248 sysgdbinit = relocated_sysgdbinit;
250 xfree (relocated_sysgdbinit);
253 homedir = getenv ("HOME");
255 /* If the .gdbinit file in the current directory is the same as
256 the $HOME/.gdbinit file, it should not be sourced. homebuf
257 and cwdbuf are used in that purpose. Make sure that the stats
258 are zero in case one of them fails (this guarantees that they
259 won't match if either exists). */
261 memset (&homebuf, 0, sizeof (struct stat));
262 memset (&cwdbuf, 0, sizeof (struct stat));
266 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
267 if (stat (homeinit, &homebuf) != 0)
274 if (stat (gdbinit, &cwdbuf) == 0)
277 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
278 sizeof (struct stat)))
285 *system_gdbinit = sysgdbinit;
286 *home_gdbinit = homeinit;
287 *local_gdbinit = localinit;
290 /* Try to set up an alternate signal stack for SIGSEGV handlers.
291 This allows us to handle SIGSEGV signals generated when the
292 normal process stack is exhausted. If this stack is not set
293 up (sigaltstack is unavailable or fails) and a SIGSEGV is
294 generated when the normal stack is exhausted then the program
295 will behave as though no SIGSEGV handler was installed. */
298 setup_alternate_signal_stack (void)
300 #ifdef HAVE_SIGALTSTACK
303 ss.ss_sp = xmalloc (SIGSTKSZ);
304 ss.ss_size = SIGSTKSZ;
307 sigaltstack(&ss, NULL);
311 /* Call command_loop. If it happens to return, pass that through as a
312 non-zero return status. */
315 captured_command_loop (void *data)
317 /* Top-level execution commands can be run in the background from
319 interpreter_async = 1;
321 current_interp_command_loop ();
322 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
323 would clean things up (restoring the cleanup chain) to the state
324 they were just prior to the call. Technically, this means that
325 the do_cleanups() below is redundant. Unfortunately, many FUNCs
326 are not that well behaved. do_cleanups should either be replaced
327 with a do_cleanups call (to cover the problem) or an assertion
328 check to detect bad FUNCs code. */
329 do_cleanups (all_cleanups ());
330 /* If the command_loop returned, normally (rather than threw an
331 error) we try to quit. If the quit is aborted, catch_errors()
332 which called this catch the signal and restart the command
334 quit_command (NULL, instream == stdin);
338 /* Handle command errors thrown from within
339 catch_command_errors/catch_command_errors_const. */
342 handle_command_errors (volatile struct gdb_exception e)
346 exception_print (gdb_stderr, e);
348 /* If any exception escaped to here, we better enable stdin.
349 Otherwise, any command that calls async_disable_stdin, and
350 then throws, will leave stdin inoperable. */
351 async_enable_stdin ();
357 /* Type of the command callback passed to catch_command_errors. */
359 typedef void (catch_command_errors_ftype) (char *, int);
361 /* Wrap calls to commands run before the event loop is started. */
364 catch_command_errors (catch_command_errors_ftype *command,
365 char *arg, int from_tty, return_mask mask)
367 volatile struct gdb_exception e;
371 int was_sync = sync_execution;
373 command (arg, from_tty);
375 maybe_wait_sync_command_done (was_sync);
377 return handle_command_errors (e);
380 /* Type of the command callback passed to catch_command_errors_const. */
382 typedef void (catch_command_errors_const_ftype) (const char *, int);
384 /* Like catch_command_errors, but works with const command and args. */
387 catch_command_errors_const (catch_command_errors_const_ftype *command,
388 const char *arg, int from_tty, return_mask mask)
390 volatile struct gdb_exception e;
394 int was_sync = sync_execution;
396 command (arg, from_tty);
398 maybe_wait_sync_command_done (was_sync);
400 return handle_command_errors (e);
403 /* Type of this option. */
406 /* Option type -x. */
409 /* Option type -ex. */
412 /* Option type -ix. */
415 /* Option type -iex. */
419 /* Arguments of --command option and its counterpart. */
420 typedef struct cmdarg {
421 /* Type of this option. */
422 enum cmdarg_kind type;
424 /* Value of this option - filename or the GDB command itself. String memory
425 is not owned by this structure despite it is 'const'. */
429 /* Define type VEC (cmdarg_s). */
430 DEF_VEC_O (cmdarg_s);
433 captured_main (void *data)
435 struct captured_main_args *context = data;
436 int argc = context->argc;
437 char **argv = context->argv;
438 static int quiet = 0;
439 static int set_args = 0;
440 static int inhibit_home_gdbinit = 0;
442 /* Pointers to various arguments from command line. */
444 char *execarg = NULL;
446 char *corearg = NULL;
447 char *pid_or_core_arg = NULL;
451 /* These are static so that we can take their address in an
453 static int print_help;
454 static int print_version;
455 static int print_configuration;
457 /* Pointers to all arguments of --command option. */
458 VEC (cmdarg_s) *cmdarg_vec = NULL;
459 struct cmdarg *cmdarg_p;
461 /* Indices of all arguments of --directory option. */
463 /* Allocated size. */
465 /* Number of elements used. */
468 /* gdb init files. */
469 const char *system_gdbinit;
470 const char *home_gdbinit;
471 const char *local_gdbinit;
475 struct objfile *objfile;
477 struct cleanup *pre_stat_chain;
480 /* Set this before calling make_command_stats_cleanup. */
481 lim_at_start = (char *) sbrk (0);
484 pre_stat_chain = make_command_stats_cleanup (0);
486 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
487 setlocale (LC_MESSAGES, "");
489 #if defined (HAVE_SETLOCALE)
490 setlocale (LC_CTYPE, "");
492 bindtextdomain (PACKAGE, LOCALEDIR);
493 textdomain (PACKAGE);
498 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
500 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
504 saved_command_line = (char *) xmalloc (saved_command_line_size);
505 saved_command_line[0] = '\0';
509 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
510 as a Windows pipe, and Windows buffers on pipes. */
511 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
514 gdb_stdout = stdio_fileopen (stdout);
515 gdb_stderr = stderr_fileopen ();
517 gdb_stdlog = gdb_stderr; /* for moment */
518 gdb_stdtarg = gdb_stderr; /* for moment */
519 gdb_stdin = stdio_fileopen (stdin);
520 gdb_stdtargerr = gdb_stderr; /* for moment */
521 gdb_stdtargin = gdb_stdin; /* for moment */
524 /* On Windows, argv[0] is not necessarily set to absolute form when
525 GDB is found along PATH, without which relocation doesn't work. */
526 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
528 gdb_program_name = xstrdup (argv[0]);
531 /* Prefix warning messages with the command name. */
532 warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
534 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
535 perror_warning_with_name (_("error finding working directory"));
537 current_directory = gdb_dirbuf;
539 /* Set the sysroot path. */
540 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
541 TARGET_SYSTEM_ROOT_RELOCATABLE);
543 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
544 DEBUGDIR_RELOCATABLE);
546 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
547 GDB_DATADIR_RELOCATABLE);
549 #ifdef WITH_PYTHON_PATH
551 /* For later use in helping Python find itself. */
552 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
554 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
560 add_substitute_path_rule (RELOC_SRCDIR,
561 make_relative_prefix (gdb_program_name, BINDIR,
565 /* There will always be an interpreter. Either the one passed into
566 this captured main, or one specified by the user at start up, or
567 the console. Initialize the interpreter to the one requested by
569 interpreter_p = xstrdup (context->interpreter_p);
571 /* Parse arguments and options. */
574 /* When var field is 0, use flag field to record the equivalent
575 short option (or arbitrary numbers starting at 10 for those
576 with no equivalent). */
588 static struct option long_options[] =
590 {"tui", no_argument, 0, OPT_TUI},
591 {"xdb", no_argument, &xdb_commands, 1},
592 {"dbx", no_argument, &dbx_commands, 1},
593 {"readnow", no_argument, &readnow_symbol_files, 1},
594 {"r", no_argument, &readnow_symbol_files, 1},
595 {"quiet", no_argument, &quiet, 1},
596 {"q", no_argument, &quiet, 1},
597 {"silent", no_argument, &quiet, 1},
598 {"nh", no_argument, &inhibit_home_gdbinit, 1},
599 {"nx", no_argument, &inhibit_gdbinit, 1},
600 {"n", no_argument, &inhibit_gdbinit, 1},
601 {"batch-silent", no_argument, 0, 'B'},
602 {"batch", no_argument, &batch_flag, 1},
604 /* This is a synonym for "--annotate=1". --annotate is now
605 preferred, but keep this here for a long time because people
606 will be running emacses which use --fullname. */
607 {"fullname", no_argument, 0, 'f'},
608 {"f", no_argument, 0, 'f'},
610 {"annotate", required_argument, 0, OPT_ANNOTATE},
611 {"help", no_argument, &print_help, 1},
612 {"se", required_argument, 0, OPT_SE},
613 {"symbols", required_argument, 0, 's'},
614 {"s", required_argument, 0, 's'},
615 {"exec", required_argument, 0, 'e'},
616 {"e", required_argument, 0, 'e'},
617 {"core", required_argument, 0, 'c'},
618 {"c", required_argument, 0, 'c'},
619 {"pid", required_argument, 0, 'p'},
620 {"p", required_argument, 0, 'p'},
621 {"command", required_argument, 0, 'x'},
622 {"eval-command", required_argument, 0, 'X'},
623 {"version", no_argument, &print_version, 1},
624 {"configuration", no_argument, &print_configuration, 1},
625 {"x", required_argument, 0, 'x'},
626 {"ex", required_argument, 0, 'X'},
627 {"init-command", required_argument, 0, OPT_IX},
628 {"init-eval-command", required_argument, 0, OPT_IEX},
629 {"ix", required_argument, 0, OPT_IX},
630 {"iex", required_argument, 0, OPT_IEX},
632 {"tclcommand", required_argument, 0, 'z'},
633 {"enable-external-editor", no_argument, 0, 'y'},
634 {"editor-command", required_argument, 0, 'w'},
636 {"ui", required_argument, 0, 'i'},
637 {"interpreter", required_argument, 0, 'i'},
638 {"i", required_argument, 0, 'i'},
639 {"directory", required_argument, 0, 'd'},
640 {"d", required_argument, 0, 'd'},
641 {"data-directory", required_argument, 0, 'D'},
642 {"D", required_argument, 0, 'D'},
643 {"cd", required_argument, 0, OPT_CD},
644 {"tty", required_argument, 0, 't'},
645 {"baud", required_argument, 0, 'b'},
646 {"b", required_argument, 0, 'b'},
647 {"nw", no_argument, NULL, OPT_NOWINDOWS},
648 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
649 {"w", no_argument, NULL, OPT_WINDOWS},
650 {"windows", no_argument, NULL, OPT_WINDOWS},
651 {"statistics", no_argument, 0, OPT_STATISTICS},
652 {"write", no_argument, &write_files, 1},
653 {"args", no_argument, &set_args, 1},
654 {"l", required_argument, 0, 'l'},
655 {"return-child-result", no_argument, &return_child_result, 1},
656 {0, no_argument, 0, 0}
663 c = getopt_long_only (argc, argv, "",
664 long_options, &option_index);
665 if (c == EOF || set_args)
668 /* Long option that takes an argument. */
669 if (c == 0 && long_options[option_index].flag == 0)
670 c = long_options[option_index].val;
675 /* Long option that just sets a flag. */
685 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
686 annotation_level = atoi (optarg);
689 /* Enable the display of both time and space usage. */
690 set_per_command_time (1);
691 set_per_command_space (1);
694 /* --tui is equivalent to -i=tui. */
696 xfree (interpreter_p);
697 interpreter_p = xstrdup (INTERP_TUI);
699 error (_("%s: TUI mode is not supported"), gdb_program_name);
703 /* FIXME: cagney/2003-03-01: Not sure if this option is
704 actually useful, and if it is, what it should do. */
706 /* --windows is equivalent to -i=insight. */
707 xfree (interpreter_p);
708 interpreter_p = xstrdup (INTERP_INSIGHT);
712 /* -nw is equivalent to -i=console. */
713 xfree (interpreter_p);
714 interpreter_p = xstrdup (INTERP_CONSOLE);
717 annotation_level = 1;
733 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
735 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
740 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
742 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
747 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
749 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
754 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
756 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
760 batch_flag = batch_silent = 1;
761 gdb_stdout = ui_file_new();
764 if (optarg[0] == '\0')
765 error (_("%s: empty path for `--data-directory'"),
767 set_gdb_data_directory (optarg);
768 gdb_datadir_provided = 1;
773 extern int gdbtk_test (char *);
775 if (!gdbtk_test (optarg))
776 error (_("%s: unable to load tclcommand file \"%s\""),
777 gdb_program_name, optarg);
781 /* Backwards compatibility only. */
785 /* Set the external editor commands when gdb is farming out files
786 to be edited by another program. */
787 extern char *external_editor_command;
789 external_editor_command = xstrdup (optarg);
794 xfree (interpreter_p);
795 interpreter_p = xstrdup (optarg);
798 dirarg[ndir++] = optarg;
802 dirarg = (char **) xrealloc ((char *) dirarg,
803 dirsize * sizeof (*dirarg));
817 i = strtol (optarg, &p, 0);
818 if (i == 0 && p == optarg)
819 warning (_("could not set baud rate to `%s'."),
830 i = strtol (optarg, &p, 0);
831 if (i == 0 && p == optarg)
832 warning (_("could not set timeout limit to `%s'."),
840 error (_("Use `%s --help' for a complete list of options."),
849 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
850 setup_alternate_signal_stack ();
852 /* Initialize all files. Give the interpreter a chance to take
853 control of the console via the deprecated_init_ui_hook (). */
854 gdb_init (gdb_program_name);
856 /* Now that gdb_init has created the initial inferior, we're in
857 position to set args for that inferior. */
860 /* The remaining options are the command-line options for the
861 inferior. The first one is the sym/exec file, and the rest
864 error (_("%s: `--args' specified but no program specified"),
867 symarg = argv[optind];
868 execarg = argv[optind];
870 set_inferior_args_vector (argc - optind, &argv[optind]);
874 /* OK, that's all the options. */
876 /* The first argument, if specified, is the name of the
880 symarg = argv[optind];
881 execarg = argv[optind];
885 /* If the user hasn't already specified a PID or the name of a
886 core file, then a second optional argument is allowed. If
887 present, this argument should be interpreted as either a
888 PID or a core file, whichever works. */
889 if (pidarg == NULL && corearg == NULL && optind < argc)
891 pid_or_core_arg = argv[optind];
895 /* Any argument left on the command line is unexpected and
896 will be ignored. Inform the user. */
898 fprintf_unfiltered (gdb_stderr,
899 _("Excess command line "
900 "arguments ignored. (%s%s)\n"),
902 (optind == argc - 1) ? "" : " ...");
905 /* Lookup gdbinit files. Note that the gdbinit file name may be
906 overriden during file initialization, so get_init_files should be
907 called after gdb_init. */
908 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
910 /* Do these (and anything which might call wrap_here or *_filtered)
911 after initialize_all_files() but before the interpreter has been
912 installed. Otherwize the help/version messages will be eaten by
913 the interpreter's output handler. */
917 print_gdb_version (gdb_stdout);
919 printf_filtered ("\n");
925 print_gdb_help (gdb_stdout);
926 fputs_unfiltered ("\n", gdb_stdout);
930 if (print_configuration)
932 print_gdb_configuration (gdb_stdout);
934 printf_filtered ("\n");
938 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
939 GDB retain the old MI1 interpreter startup behavior. Output the
940 copyright message before the interpreter is installed. That way
941 it isn't encapsulated in MI output. */
942 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
944 /* Print all the junk at the top, with trailing "..." if we are
945 about to read a symbol file (possibly slowly). */
946 print_gdb_version (gdb_stdout);
948 printf_filtered ("..");
950 printf_filtered ("\n");
951 gdb_flush (gdb_stdout); /* Force to screen during slow
955 /* Install the default UI. All the interpreters should have had a
956 look at things by now. Initialize the default interpreter. */
960 struct interp *interp = interp_lookup (interpreter_p);
963 error (_("Interpreter `%s' unrecognized"), interpreter_p);
965 if (!interp_set (interp, 1))
966 error (_("Interpreter `%s' failed to initialize."), interpreter_p);
969 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
970 GDB retain the old MI1 interpreter startup behavior. Output the
971 copyright message after the interpreter is installed when it is
972 any sane interpreter. */
973 if (!quiet && !current_interp_named_p (INTERP_MI1))
975 /* Print all the junk at the top, with trailing "..." if we are
976 about to read a symbol file (possibly slowly). */
977 print_gdb_version (gdb_stdout);
979 printf_filtered ("..");
981 printf_filtered ("\n");
982 gdb_flush (gdb_stdout); /* Force to screen during slow
986 /* Set off error and warning messages with a blank line. */
987 xfree (warning_pre_print);
988 warning_pre_print = _("\nwarning: ");
990 /* Read and execute the system-wide gdbinit file, if it exists.
991 This is done *before* all the command line arguments are
992 processed; it sets global parameters, which are independent of
993 what file you are debugging or what directory you are in. */
994 if (system_gdbinit && !inhibit_gdbinit)
995 catch_command_errors_const (source_script, system_gdbinit,
998 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
999 *before* all the command line arguments are processed; it sets
1000 global parameters, which are independent of what file you are
1001 debugging or what directory you are in. */
1003 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
1004 catch_command_errors_const (source_script,
1005 home_gdbinit, 0, RETURN_MASK_ALL);
1007 /* Process '-ix' and '-iex' options early. */
1008 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1009 switch (cmdarg_p->type)
1011 case CMDARG_INIT_FILE:
1012 catch_command_errors_const (source_script, cmdarg_p->string,
1013 !batch_flag, RETURN_MASK_ALL);
1015 case CMDARG_INIT_COMMAND:
1016 catch_command_errors (execute_command, cmdarg_p->string,
1017 !batch_flag, RETURN_MASK_ALL);
1021 /* Now perform all the actions indicated by the arguments. */
1024 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
1027 for (i = 0; i < ndir; i++)
1028 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
1031 /* Skip auto-loading section-specified scripts until we've sourced
1032 local_gdbinit (which is often used to augment the source search
1034 save_auto_load = global_auto_load;
1035 global_auto_load = 0;
1039 && strcmp (execarg, symarg) == 0)
1041 /* The exec file and the symbol-file are the same. If we can't
1042 open it, better only print one error message.
1043 catch_command_errors returns non-zero on success! */
1044 if (catch_command_errors_const (exec_file_attach, execarg,
1045 !batch_flag, RETURN_MASK_ALL))
1046 catch_command_errors_const (symbol_file_add_main, symarg,
1047 !batch_flag, RETURN_MASK_ALL);
1051 if (execarg != NULL)
1052 catch_command_errors_const (exec_file_attach, execarg,
1053 !batch_flag, RETURN_MASK_ALL);
1055 catch_command_errors_const (symbol_file_add_main, symarg,
1056 !batch_flag, RETURN_MASK_ALL);
1059 if (corearg && pidarg)
1060 error (_("Can't attach to process and specify "
1061 "a core file at the same time."));
1063 if (corearg != NULL)
1064 catch_command_errors (core_file_command, corearg,
1065 !batch_flag, RETURN_MASK_ALL);
1066 else if (pidarg != NULL)
1067 catch_command_errors (attach_command, pidarg,
1068 !batch_flag, RETURN_MASK_ALL);
1069 else if (pid_or_core_arg)
1071 /* The user specified 'gdb program pid' or gdb program core'.
1072 If pid_or_core_arg's first character is a digit, try attach
1073 first and then corefile. Otherwise try just corefile. */
1075 if (isdigit (pid_or_core_arg[0]))
1077 if (catch_command_errors (attach_command, pid_or_core_arg,
1078 !batch_flag, RETURN_MASK_ALL) == 0)
1079 catch_command_errors (core_file_command, pid_or_core_arg,
1080 !batch_flag, RETURN_MASK_ALL);
1082 else /* Can't be a pid, better be a corefile. */
1083 catch_command_errors (core_file_command, pid_or_core_arg,
1084 !batch_flag, RETURN_MASK_ALL);
1088 set_inferior_io_terminal (ttyarg);
1090 /* Error messages should no longer be distinguished with extra output. */
1091 warning_pre_print = _("warning: ");
1093 /* Read the .gdbinit file in the current directory, *if* it isn't
1094 the same as the $HOME/.gdbinit file (it should exist, also). */
1097 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1099 if (!inhibit_gdbinit && auto_load_local_gdbinit
1100 && file_is_auto_load_safe (local_gdbinit,
1101 _("auto-load: Loading .gdbinit "
1105 auto_load_local_gdbinit_loaded = 1;
1107 catch_command_errors_const (source_script, local_gdbinit, 0,
1112 /* Now that all .gdbinit's have been read and all -d options have been
1113 processed, we can read any scripts mentioned in SYMARG.
1114 We wait until now because it is common to add to the source search
1115 path in local_gdbinit. */
1116 global_auto_load = save_auto_load;
1117 ALL_OBJFILES (objfile)
1118 load_auto_scripts_for_objfile (objfile);
1120 /* Process '-x' and '-ex' options. */
1121 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1122 switch (cmdarg_p->type)
1125 catch_command_errors_const (source_script, cmdarg_p->string,
1126 !batch_flag, RETURN_MASK_ALL);
1128 case CMDARG_COMMAND:
1129 catch_command_errors (execute_command, cmdarg_p->string,
1130 !batch_flag, RETURN_MASK_ALL);
1134 /* Read in the old history after all the command files have been
1140 /* We have hit the end of the batch file. */
1141 quit_force (NULL, 0);
1144 /* Show time and/or space usage. */
1145 do_cleanups (pre_stat_chain);
1147 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1148 moving this loop and the code found in captured_command_loop()
1149 into the command_loop() proper. The main thing holding back that
1150 change - SET_TOP_LEVEL() - has been eliminated. */
1153 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1155 /* No exit -- exit is through quit_command. */
1159 gdb_main (struct captured_main_args *args)
1161 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1162 /* The only way to end up here is by an error (normal exit is
1163 handled by quit_force()), hence always return an error status. */
1168 /* Don't use *_filtered for printing help. We don't want to prompt
1169 for continue no matter how small the screen or how much we're going
1173 print_gdb_help (struct ui_file *stream)
1175 const char *system_gdbinit;
1176 const char *home_gdbinit;
1177 const char *local_gdbinit;
1179 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1181 /* Note: The options in the list below are only approximately sorted
1182 in the alphabetical order, so as to group closely related options
1184 fputs_unfiltered (_("\
1185 This is the GNU debugger. Usage:\n\n\
1186 gdb [options] [executable-file [core-file or process-id]]\n\
1187 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1189 fputs_unfiltered (_("\
1190 Selection of debuggee and its files:\n\n\
1191 --args Arguments after executable-file are passed to inferior\n\
1192 --core=COREFILE Analyze the core dump COREFILE.\n\
1193 --exec=EXECFILE Use EXECFILE as the executable.\n\
1194 --pid=PID Attach to running process PID.\n\
1195 --directory=DIR Search for source files in DIR.\n\
1196 --se=FILE Use FILE as symbol file and executable file.\n\
1197 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1198 --readnow Fully read symbol files on first access.\n\
1199 --write Set writing into executable and core files.\n\n\
1201 fputs_unfiltered (_("\
1202 Initial commands and command files:\n\n\
1203 --command=FILE, -x Execute GDB commands from FILE.\n\
1204 --init-command=FILE, -ix\n\
1205 Like -x but execute commands before loading inferior.\n\
1206 --eval-command=COMMAND, -ex\n\
1207 Execute a single GDB command.\n\
1208 May be used multiple times and in conjunction\n\
1210 --init-eval-command=COMMAND, -iex\n\
1211 Like -ex but before loading inferior.\n\
1212 --nh Do not read ~/.gdbinit.\n\
1213 --nx Do not read any .gdbinit files in any directory.\n\n\
1215 fputs_unfiltered (_("\
1216 Output and user interface control:\n\n\
1217 --fullname Output information used by emacs-GDB interface.\n\
1218 --interpreter=INTERP\n\
1219 Select a specific interpreter / user interface\n\
1220 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1221 -w Use the GUI interface.\n\
1222 --nw Do not use the GUI interface.\n\
1225 fputs_unfiltered (_("\
1226 --tui Use a terminal user interface.\n\
1229 fputs_unfiltered (_("\
1230 --dbx DBX compatibility mode.\n\
1231 --xdb XDB compatibility mode.\n\
1232 -q, --quiet, --silent\n\
1233 Do not print version number on startup.\n\n\
1235 fputs_unfiltered (_("\
1236 Operating modes:\n\n\
1237 --batch Exit after processing options.\n\
1238 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1239 --return-child-result\n\
1240 GDB exit code will be the child's exit code.\n\
1241 --configuration Print details about GDB configuration and then exit.\n\
1242 --help Print this message and then exit.\n\
1243 --version Print version information and then exit.\n\n\
1244 Remote debugging options:\n\n\
1245 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1246 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1248 --cd=DIR Change current directory to DIR.\n\
1249 --data-directory=DIR, -D\n\
1250 Set GDB's data-directory to DIR.\n\
1252 fputs_unfiltered (_("\n\
1253 At startup, GDB reads the following init files and executes their commands:\n\
1256 fprintf_unfiltered (stream, _("\
1257 * system-wide init file: %s\n\
1258 "), system_gdbinit);
1260 fprintf_unfiltered (stream, _("\
1261 * user-specific init file: %s\n\
1264 fprintf_unfiltered (stream, _("\
1265 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1267 fputs_unfiltered (_("\n\
1268 For more information, type \"help\" from within GDB, or consult the\n\
1269 GDB manual (available as on-line info or a printed manual).\n\
1271 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1272 fprintf_unfiltered (stream, _("\
1273 Report bugs to \"%s\".\n\
1274 "), REPORT_BUGS_TO);