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 (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)
369 int was_sync = sync_execution;
371 command (arg, from_tty);
373 maybe_wait_sync_command_done (was_sync);
375 CATCH (e, RETURN_MASK_ALL)
377 return handle_command_errors (e);
384 /* Type of the command callback passed to catch_command_errors_const. */
386 typedef void (catch_command_errors_const_ftype) (const char *, int);
388 /* Like catch_command_errors, but works with const command and args. */
391 catch_command_errors_const (catch_command_errors_const_ftype *command,
392 const char *arg, int from_tty)
396 int was_sync = sync_execution;
398 command (arg, from_tty);
400 maybe_wait_sync_command_done (was_sync);
402 CATCH (e, RETURN_MASK_ALL)
404 return handle_command_errors (e);
411 /* Type of this option. */
414 /* Option type -x. */
417 /* Option type -ex. */
420 /* Option type -ix. */
423 /* Option type -iex. */
427 /* Arguments of --command option and its counterpart. */
428 typedef struct cmdarg {
429 /* Type of this option. */
430 enum cmdarg_kind type;
432 /* Value of this option - filename or the GDB command itself. String memory
433 is not owned by this structure despite it is 'const'. */
437 /* Define type VEC (cmdarg_s). */
438 DEF_VEC_O (cmdarg_s);
441 captured_main (void *data)
443 struct captured_main_args *context = data;
444 int argc = context->argc;
445 char **argv = context->argv;
446 static int quiet = 0;
447 static int set_args = 0;
448 static int inhibit_home_gdbinit = 0;
450 /* Pointers to various arguments from command line. */
452 char *execarg = NULL;
454 char *corearg = NULL;
455 char *pid_or_core_arg = NULL;
459 /* These are static so that we can take their address in an
461 static int print_help;
462 static int print_version;
463 static int print_configuration;
465 /* Pointers to all arguments of --command option. */
466 VEC (cmdarg_s) *cmdarg_vec = NULL;
467 struct cmdarg *cmdarg_p;
469 /* Indices of all arguments of --directory option. */
471 /* Allocated size. */
473 /* Number of elements used. */
476 /* gdb init files. */
477 const char *system_gdbinit;
478 const char *home_gdbinit;
479 const char *local_gdbinit;
483 struct objfile *objfile;
485 struct cleanup *pre_stat_chain;
488 /* Set this before calling make_command_stats_cleanup. */
489 lim_at_start = (char *) sbrk (0);
492 pre_stat_chain = make_command_stats_cleanup (0);
494 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
495 setlocale (LC_MESSAGES, "");
497 #if defined (HAVE_SETLOCALE)
498 setlocale (LC_CTYPE, "");
500 bindtextdomain (PACKAGE, LOCALEDIR);
501 textdomain (PACKAGE);
506 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
508 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
512 saved_command_line = (char *) xmalloc (saved_command_line_size);
513 saved_command_line[0] = '\0';
517 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
518 as a Windows pipe, and Windows buffers on pipes. */
519 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
522 gdb_stdout = stdio_fileopen (stdout);
523 gdb_stderr = stderr_fileopen ();
525 gdb_stdlog = gdb_stderr; /* for moment */
526 gdb_stdtarg = gdb_stderr; /* for moment */
527 gdb_stdin = stdio_fileopen (stdin);
528 gdb_stdtargerr = gdb_stderr; /* for moment */
529 gdb_stdtargin = gdb_stdin; /* for moment */
532 /* On Windows, argv[0] is not necessarily set to absolute form when
533 GDB is found along PATH, without which relocation doesn't work. */
534 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
536 gdb_program_name = xstrdup (argv[0]);
539 /* Prefix warning messages with the command name. */
540 warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
542 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
543 perror_warning_with_name (_("error finding working directory"));
545 current_directory = gdb_dirbuf;
547 /* Set the sysroot path. */
548 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
549 TARGET_SYSTEM_ROOT_RELOCATABLE);
551 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
554 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
557 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
558 DEBUGDIR_RELOCATABLE);
560 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
561 GDB_DATADIR_RELOCATABLE);
563 #ifdef WITH_PYTHON_PATH
565 /* For later use in helping Python find itself. */
566 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
568 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
574 add_substitute_path_rule (RELOC_SRCDIR,
575 make_relative_prefix (gdb_program_name, BINDIR,
579 /* There will always be an interpreter. Either the one passed into
580 this captured main, or one specified by the user at start up, or
581 the console. Initialize the interpreter to the one requested by
583 interpreter_p = xstrdup (context->interpreter_p);
585 /* Parse arguments and options. */
588 /* When var field is 0, use flag field to record the equivalent
589 short option (or arbitrary numbers starting at 10 for those
590 with no equivalent). */
602 static struct option long_options[] =
604 {"tui", no_argument, 0, OPT_TUI},
605 {"xdb", no_argument, &xdb_commands, 1},
606 {"dbx", no_argument, &dbx_commands, 1},
607 {"readnow", no_argument, &readnow_symbol_files, 1},
608 {"r", no_argument, &readnow_symbol_files, 1},
609 {"quiet", no_argument, &quiet, 1},
610 {"q", no_argument, &quiet, 1},
611 {"silent", no_argument, &quiet, 1},
612 {"nh", no_argument, &inhibit_home_gdbinit, 1},
613 {"nx", no_argument, &inhibit_gdbinit, 1},
614 {"n", no_argument, &inhibit_gdbinit, 1},
615 {"batch-silent", no_argument, 0, 'B'},
616 {"batch", no_argument, &batch_flag, 1},
618 /* This is a synonym for "--annotate=1". --annotate is now
619 preferred, but keep this here for a long time because people
620 will be running emacses which use --fullname. */
621 {"fullname", no_argument, 0, 'f'},
622 {"f", no_argument, 0, 'f'},
624 {"annotate", required_argument, 0, OPT_ANNOTATE},
625 {"help", no_argument, &print_help, 1},
626 {"se", required_argument, 0, OPT_SE},
627 {"symbols", required_argument, 0, 's'},
628 {"s", required_argument, 0, 's'},
629 {"exec", required_argument, 0, 'e'},
630 {"e", required_argument, 0, 'e'},
631 {"core", required_argument, 0, 'c'},
632 {"c", required_argument, 0, 'c'},
633 {"pid", required_argument, 0, 'p'},
634 {"p", required_argument, 0, 'p'},
635 {"command", required_argument, 0, 'x'},
636 {"eval-command", required_argument, 0, 'X'},
637 {"version", no_argument, &print_version, 1},
638 {"configuration", no_argument, &print_configuration, 1},
639 {"x", required_argument, 0, 'x'},
640 {"ex", required_argument, 0, 'X'},
641 {"init-command", required_argument, 0, OPT_IX},
642 {"init-eval-command", required_argument, 0, OPT_IEX},
643 {"ix", required_argument, 0, OPT_IX},
644 {"iex", required_argument, 0, OPT_IEX},
646 {"tclcommand", required_argument, 0, 'z'},
647 {"enable-external-editor", no_argument, 0, 'y'},
648 {"editor-command", required_argument, 0, 'w'},
650 {"ui", required_argument, 0, 'i'},
651 {"interpreter", required_argument, 0, 'i'},
652 {"i", required_argument, 0, 'i'},
653 {"directory", required_argument, 0, 'd'},
654 {"d", required_argument, 0, 'd'},
655 {"data-directory", required_argument, 0, 'D'},
656 {"D", required_argument, 0, 'D'},
657 {"cd", required_argument, 0, OPT_CD},
658 {"tty", required_argument, 0, 't'},
659 {"baud", required_argument, 0, 'b'},
660 {"b", required_argument, 0, 'b'},
661 {"nw", no_argument, NULL, OPT_NOWINDOWS},
662 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
663 {"w", no_argument, NULL, OPT_WINDOWS},
664 {"windows", no_argument, NULL, OPT_WINDOWS},
665 {"statistics", no_argument, 0, OPT_STATISTICS},
666 {"write", no_argument, &write_files, 1},
667 {"args", no_argument, &set_args, 1},
668 {"l", required_argument, 0, 'l'},
669 {"return-child-result", no_argument, &return_child_result, 1},
670 {0, no_argument, 0, 0}
677 c = getopt_long_only (argc, argv, "",
678 long_options, &option_index);
679 if (c == EOF || set_args)
682 /* Long option that takes an argument. */
683 if (c == 0 && long_options[option_index].flag == 0)
684 c = long_options[option_index].val;
689 /* Long option that just sets a flag. */
699 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
700 annotation_level = atoi (optarg);
703 /* Enable the display of both time and space usage. */
704 set_per_command_time (1);
705 set_per_command_space (1);
708 /* --tui is equivalent to -i=tui. */
710 xfree (interpreter_p);
711 interpreter_p = xstrdup (INTERP_TUI);
713 error (_("%s: TUI mode is not supported"), gdb_program_name);
717 /* FIXME: cagney/2003-03-01: Not sure if this option is
718 actually useful, and if it is, what it should do. */
720 /* --windows is equivalent to -i=insight. */
721 xfree (interpreter_p);
722 interpreter_p = xstrdup (INTERP_INSIGHT);
726 /* -nw is equivalent to -i=console. */
727 xfree (interpreter_p);
728 interpreter_p = xstrdup (INTERP_CONSOLE);
731 annotation_level = 1;
747 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
749 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
754 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
756 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
761 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
763 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
768 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
770 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
774 batch_flag = batch_silent = 1;
775 gdb_stdout = ui_file_new();
778 if (optarg[0] == '\0')
779 error (_("%s: empty path for `--data-directory'"),
781 set_gdb_data_directory (optarg);
782 gdb_datadir_provided = 1;
787 extern int gdbtk_test (char *);
789 if (!gdbtk_test (optarg))
790 error (_("%s: unable to load tclcommand file \"%s\""),
791 gdb_program_name, optarg);
795 /* Backwards compatibility only. */
799 /* Set the external editor commands when gdb is farming out files
800 to be edited by another program. */
801 extern char *external_editor_command;
803 external_editor_command = xstrdup (optarg);
808 xfree (interpreter_p);
809 interpreter_p = xstrdup (optarg);
812 dirarg[ndir++] = optarg;
816 dirarg = (char **) xrealloc ((char *) dirarg,
817 dirsize * sizeof (*dirarg));
831 i = strtol (optarg, &p, 0);
832 if (i == 0 && p == optarg)
833 warning (_("could not set baud rate to `%s'."),
844 i = strtol (optarg, &p, 0);
845 if (i == 0 && p == optarg)
846 warning (_("could not set timeout limit to `%s'."),
854 error (_("Use `%s --help' for a complete list of options."),
863 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
864 setup_alternate_signal_stack ();
866 /* Initialize all files. Give the interpreter a chance to take
867 control of the console via the deprecated_init_ui_hook (). */
868 gdb_init (gdb_program_name);
870 /* Now that gdb_init has created the initial inferior, we're in
871 position to set args for that inferior. */
874 /* The remaining options are the command-line options for the
875 inferior. The first one is the sym/exec file, and the rest
878 error (_("%s: `--args' specified but no program specified"),
881 symarg = argv[optind];
882 execarg = argv[optind];
884 set_inferior_args_vector (argc - optind, &argv[optind]);
888 /* OK, that's all the options. */
890 /* The first argument, if specified, is the name of the
894 symarg = argv[optind];
895 execarg = argv[optind];
899 /* If the user hasn't already specified a PID or the name of a
900 core file, then a second optional argument is allowed. If
901 present, this argument should be interpreted as either a
902 PID or a core file, whichever works. */
903 if (pidarg == NULL && corearg == NULL && optind < argc)
905 pid_or_core_arg = argv[optind];
909 /* Any argument left on the command line is unexpected and
910 will be ignored. Inform the user. */
912 fprintf_unfiltered (gdb_stderr,
913 _("Excess command line "
914 "arguments ignored. (%s%s)\n"),
916 (optind == argc - 1) ? "" : " ...");
919 /* Lookup gdbinit files. Note that the gdbinit file name may be
920 overriden during file initialization, so get_init_files should be
921 called after gdb_init. */
922 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
924 /* Do these (and anything which might call wrap_here or *_filtered)
925 after initialize_all_files() but before the interpreter has been
926 installed. Otherwize the help/version messages will be eaten by
927 the interpreter's output handler. */
931 print_gdb_version (gdb_stdout);
933 printf_filtered ("\n");
939 print_gdb_help (gdb_stdout);
940 fputs_unfiltered ("\n", gdb_stdout);
944 if (print_configuration)
946 print_gdb_configuration (gdb_stdout);
948 printf_filtered ("\n");
952 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
953 GDB retain the old MI1 interpreter startup behavior. Output the
954 copyright message before the interpreter is installed. That way
955 it isn't encapsulated in MI output. */
956 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
958 /* Print all the junk at the top, with trailing "..." if we are
959 about to read a symbol file (possibly slowly). */
960 print_gdb_version (gdb_stdout);
962 printf_filtered ("..");
964 printf_filtered ("\n");
965 gdb_flush (gdb_stdout); /* Force to screen during slow
969 /* Install the default UI. All the interpreters should have had a
970 look at things by now. Initialize the default interpreter. */
974 struct interp *interp = interp_lookup (interpreter_p);
977 error (_("Interpreter `%s' unrecognized"), interpreter_p);
979 if (!interp_set (interp, 1))
980 error (_("Interpreter `%s' failed to initialize."), interpreter_p);
983 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
984 GDB retain the old MI1 interpreter startup behavior. Output the
985 copyright message after the interpreter is installed when it is
986 any sane interpreter. */
987 if (!quiet && !current_interp_named_p (INTERP_MI1))
989 /* Print all the junk at the top, with trailing "..." if we are
990 about to read a symbol file (possibly slowly). */
991 print_gdb_version (gdb_stdout);
993 printf_filtered ("..");
995 printf_filtered ("\n");
996 gdb_flush (gdb_stdout); /* Force to screen during slow
1000 /* Set off error and warning messages with a blank line. */
1001 xfree (warning_pre_print);
1002 warning_pre_print = _("\nwarning: ");
1004 /* Read and execute the system-wide gdbinit file, if it exists.
1005 This is done *before* all the command line arguments are
1006 processed; it sets global parameters, which are independent of
1007 what file you are debugging or what directory you are in. */
1008 if (system_gdbinit && !inhibit_gdbinit)
1009 catch_command_errors_const (source_script, system_gdbinit, 0);
1011 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
1012 *before* all the command line arguments are processed; it sets
1013 global parameters, which are independent of what file you are
1014 debugging or what directory you are in. */
1016 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
1017 catch_command_errors_const (source_script, home_gdbinit, 0);
1019 /* Process '-ix' and '-iex' options early. */
1020 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1021 switch (cmdarg_p->type)
1023 case CMDARG_INIT_FILE:
1024 catch_command_errors_const (source_script, cmdarg_p->string,
1027 case CMDARG_INIT_COMMAND:
1028 catch_command_errors (execute_command, cmdarg_p->string,
1033 /* Now perform all the actions indicated by the arguments. */
1036 catch_command_errors (cd_command, cdarg, 0);
1039 for (i = 0; i < ndir; i++)
1040 catch_command_errors (directory_switch, dirarg[i], 0);
1043 /* Skip auto-loading section-specified scripts until we've sourced
1044 local_gdbinit (which is often used to augment the source search
1046 save_auto_load = global_auto_load;
1047 global_auto_load = 0;
1051 && strcmp (execarg, symarg) == 0)
1053 /* The exec file and the symbol-file are the same. If we can't
1054 open it, better only print one error message.
1055 catch_command_errors returns non-zero on success! */
1056 if (catch_command_errors_const (exec_file_attach, execarg,
1058 catch_command_errors_const (symbol_file_add_main, symarg,
1063 if (execarg != NULL)
1064 catch_command_errors_const (exec_file_attach, execarg,
1067 catch_command_errors_const (symbol_file_add_main, symarg,
1071 if (corearg && pidarg)
1072 error (_("Can't attach to process and specify "
1073 "a core file at the same time."));
1075 if (corearg != NULL)
1076 catch_command_errors (core_file_command, corearg, !batch_flag);
1077 else if (pidarg != NULL)
1078 catch_command_errors (attach_command, pidarg, !batch_flag);
1079 else if (pid_or_core_arg)
1081 /* The user specified 'gdb program pid' or gdb program core'.
1082 If pid_or_core_arg's first character is a digit, try attach
1083 first and then corefile. Otherwise try just corefile. */
1085 if (isdigit (pid_or_core_arg[0]))
1087 if (catch_command_errors (attach_command, pid_or_core_arg,
1089 catch_command_errors (core_file_command, pid_or_core_arg,
1092 else /* Can't be a pid, better be a corefile. */
1093 catch_command_errors (core_file_command, pid_or_core_arg,
1098 set_inferior_io_terminal (ttyarg);
1100 /* Error messages should no longer be distinguished with extra output. */
1101 warning_pre_print = _("warning: ");
1103 /* Read the .gdbinit file in the current directory, *if* it isn't
1104 the same as the $HOME/.gdbinit file (it should exist, also). */
1107 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1109 if (!inhibit_gdbinit && auto_load_local_gdbinit
1110 && file_is_auto_load_safe (local_gdbinit,
1111 _("auto-load: Loading .gdbinit "
1115 auto_load_local_gdbinit_loaded = 1;
1117 catch_command_errors_const (source_script, local_gdbinit, 0);
1121 /* Now that all .gdbinit's have been read and all -d options have been
1122 processed, we can read any scripts mentioned in SYMARG.
1123 We wait until now because it is common to add to the source search
1124 path in local_gdbinit. */
1125 global_auto_load = save_auto_load;
1126 ALL_OBJFILES (objfile)
1127 load_auto_scripts_for_objfile (objfile);
1129 /* Process '-x' and '-ex' options. */
1130 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1131 switch (cmdarg_p->type)
1134 catch_command_errors_const (source_script, cmdarg_p->string,
1137 case CMDARG_COMMAND:
1138 catch_command_errors (execute_command, cmdarg_p->string,
1143 /* Read in the old history after all the command files have been
1149 /* We have hit the end of the batch file. */
1150 quit_force (NULL, 0);
1153 /* Show time and/or space usage. */
1154 do_cleanups (pre_stat_chain);
1156 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1157 moving this loop and the code found in captured_command_loop()
1158 into the command_loop() proper. The main thing holding back that
1159 change - SET_TOP_LEVEL() - has been eliminated. */
1162 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1164 /* No exit -- exit is through quit_command. */
1168 gdb_main (struct captured_main_args *args)
1170 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1171 /* The only way to end up here is by an error (normal exit is
1172 handled by quit_force()), hence always return an error status. */
1177 /* Don't use *_filtered for printing help. We don't want to prompt
1178 for continue no matter how small the screen or how much we're going
1182 print_gdb_help (struct ui_file *stream)
1184 const char *system_gdbinit;
1185 const char *home_gdbinit;
1186 const char *local_gdbinit;
1188 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1190 /* Note: The options in the list below are only approximately sorted
1191 in the alphabetical order, so as to group closely related options
1193 fputs_unfiltered (_("\
1194 This is the GNU debugger. Usage:\n\n\
1195 gdb [options] [executable-file [core-file or process-id]]\n\
1196 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1198 fputs_unfiltered (_("\
1199 Selection of debuggee and its files:\n\n\
1200 --args Arguments after executable-file are passed to inferior\n\
1201 --core=COREFILE Analyze the core dump COREFILE.\n\
1202 --exec=EXECFILE Use EXECFILE as the executable.\n\
1203 --pid=PID Attach to running process PID.\n\
1204 --directory=DIR Search for source files in DIR.\n\
1205 --se=FILE Use FILE as symbol file and executable file.\n\
1206 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1207 --readnow Fully read symbol files on first access.\n\
1208 --write Set writing into executable and core files.\n\n\
1210 fputs_unfiltered (_("\
1211 Initial commands and command files:\n\n\
1212 --command=FILE, -x Execute GDB commands from FILE.\n\
1213 --init-command=FILE, -ix\n\
1214 Like -x but execute commands before loading inferior.\n\
1215 --eval-command=COMMAND, -ex\n\
1216 Execute a single GDB command.\n\
1217 May be used multiple times and in conjunction\n\
1219 --init-eval-command=COMMAND, -iex\n\
1220 Like -ex but before loading inferior.\n\
1221 --nh Do not read ~/.gdbinit.\n\
1222 --nx Do not read any .gdbinit files in any directory.\n\n\
1224 fputs_unfiltered (_("\
1225 Output and user interface control:\n\n\
1226 --fullname Output information used by emacs-GDB interface.\n\
1227 --interpreter=INTERP\n\
1228 Select a specific interpreter / user interface\n\
1229 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1230 -w Use the GUI interface.\n\
1231 --nw Do not use the GUI interface.\n\
1234 fputs_unfiltered (_("\
1235 --tui Use a terminal user interface.\n\
1238 fputs_unfiltered (_("\
1239 --dbx DBX compatibility mode.\n\
1240 --xdb XDB compatibility mode.\n\
1241 -q, --quiet, --silent\n\
1242 Do not print version number on startup.\n\n\
1244 fputs_unfiltered (_("\
1245 Operating modes:\n\n\
1246 --batch Exit after processing options.\n\
1247 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1248 --return-child-result\n\
1249 GDB exit code will be the child's exit code.\n\
1250 --configuration Print details about GDB configuration and then exit.\n\
1251 --help Print this message and then exit.\n\
1252 --version Print version information and then exit.\n\n\
1253 Remote debugging options:\n\n\
1254 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1255 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1257 --cd=DIR Change current directory to DIR.\n\
1258 --data-directory=DIR, -D\n\
1259 Set GDB's data-directory to DIR.\n\
1261 fputs_unfiltered (_("\n\
1262 At startup, GDB reads the following init files and executes their commands:\n\
1265 fprintf_unfiltered (stream, _("\
1266 * system-wide init file: %s\n\
1267 "), system_gdbinit);
1269 fprintf_unfiltered (stream, _("\
1270 * user-specific init file: %s\n\
1273 fprintf_unfiltered (stream, _("\
1274 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1276 fputs_unfiltered (_("\n\
1277 For more information, type \"help\" from within GDB, or consult the\n\
1278 GDB manual (available as on-line info or a printed manual).\n\
1280 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1281 fprintf_unfiltered (stream, _("\
1282 Report bugs to \"%s\".\n\
1283 "), REPORT_BUGS_TO);