1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2016 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 dbx commands will be handled. */
56 /* System root path, used to find libraries etc. */
57 char *gdb_sysroot = 0;
59 /* GDB datadir, used to store data files. */
60 char *gdb_datadir = 0;
62 /* Non-zero if GDB_DATADIR was provided on the command line.
63 This doesn't track whether data-directory is set later from the
64 command line, but we don't reread system.gdbinit when that happens. */
65 static int gdb_datadir_provided = 0;
67 /* If gdb was configured with --with-python=/path,
68 the possibly relocated path to python's lib directory. */
69 char *python_libdir = 0;
71 /* Target IO streams. */
72 struct ui_file *gdb_stdtargin;
73 struct ui_file *gdb_stdtarg;
74 struct ui_file *gdb_stdtargerr;
76 /* True if --batch or --batch-silent was seen. */
79 /* Support for the --batch-silent option. */
82 /* Support for --return-child-result option.
83 Set the default to -1 to return error in the case
84 that the program does not run or does not complete. */
85 int return_child_result = 0;
86 int return_child_result_value = -1;
89 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
90 static char *gdb_program_name;
92 /* Return read only pointer to GDB_PROGRAM_NAME. */
94 get_gdb_program_name (void)
96 return gdb_program_name;
99 static void print_gdb_help (struct ui_file *);
101 /* Set the data-directory parameter to NEW_DATADIR.
102 If NEW_DATADIR is not a directory then a warning is printed.
103 We don't signal an error for backward compatibility. */
106 set_gdb_data_directory (const char *new_datadir)
110 if (stat (new_datadir, &st) < 0)
112 int save_errno = errno;
114 fprintf_unfiltered (gdb_stderr, "Warning: ");
115 print_sys_errmsg (new_datadir, save_errno);
117 else if (!S_ISDIR (st.st_mode))
118 warning (_("%s is not a directory."), new_datadir);
121 gdb_datadir = gdb_realpath (new_datadir);
123 /* gdb_realpath won't return an absolute path if the path doesn't exist,
124 but we still want to record an absolute path here. If the user entered
125 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
126 isn't canonical, but that's ok. */
127 if (!IS_ABSOLUTE_PATH (gdb_datadir))
129 char *abs_datadir = gdb_abspath (gdb_datadir);
132 gdb_datadir = abs_datadir;
136 /* Relocate a file or directory. PROGNAME is the name by which gdb
137 was invoked (i.e., argv[0]). INITIAL is the default value for the
138 file or directory. FLAG is true if the value is relocatable, false
139 otherwise. Returns a newly allocated string; this may return NULL
140 under the same conditions as make_relative_prefix. */
143 relocate_path (const char *progname, const char *initial, int flag)
146 return make_relative_prefix (progname, BINDIR, initial);
147 return xstrdup (initial);
150 /* Like relocate_path, but specifically checks for a directory.
151 INITIAL is relocated according to the rules of relocate_path. If
152 the result is a directory, it is used; otherwise, INITIAL is used.
153 The chosen directory is then canonicalized using lrealpath. This
154 function always returns a newly-allocated string. */
157 relocate_gdb_directory (const char *initial, int flag)
161 dir = relocate_path (gdb_program_name, initial, flag);
166 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
173 dir = xstrdup (initial);
175 /* Canonicalize the directory. */
178 char *canon_sysroot = lrealpath (dir);
190 /* Compute the locations of init files that GDB should source and
191 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
192 there is no system gdbinit (resp. home gdbinit and local gdbinit)
193 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
194 LOCAL_GDBINIT) is set to NULL. */
196 get_init_files (const char **system_gdbinit,
197 const char **home_gdbinit,
198 const char **local_gdbinit)
200 static const char *sysgdbinit = NULL;
201 static char *homeinit = NULL;
202 static const char *localinit = NULL;
203 static int initialized = 0;
207 struct stat homebuf, cwdbuf, s;
210 if (SYSTEM_GDBINIT[0])
212 int datadir_len = strlen (GDB_DATADIR);
213 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
214 char *relocated_sysgdbinit;
216 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
217 has been provided, search for SYSTEM_GDBINIT there. */
218 if (gdb_datadir_provided
219 && datadir_len < sys_gdbinit_len
220 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
221 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
223 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
225 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
228 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
230 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
232 xfree (tmp_sys_gdbinit);
236 relocated_sysgdbinit = relocate_path (gdb_program_name,
238 SYSTEM_GDBINIT_RELOCATABLE);
240 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
241 sysgdbinit = relocated_sysgdbinit;
243 xfree (relocated_sysgdbinit);
246 homedir = getenv ("HOME");
248 /* If the .gdbinit file in the current directory is the same as
249 the $HOME/.gdbinit file, it should not be sourced. homebuf
250 and cwdbuf are used in that purpose. Make sure that the stats
251 are zero in case one of them fails (this guarantees that they
252 won't match if either exists). */
254 memset (&homebuf, 0, sizeof (struct stat));
255 memset (&cwdbuf, 0, sizeof (struct stat));
259 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
260 if (stat (homeinit, &homebuf) != 0)
267 if (stat (gdbinit, &cwdbuf) == 0)
270 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
271 sizeof (struct stat)))
278 *system_gdbinit = sysgdbinit;
279 *home_gdbinit = homeinit;
280 *local_gdbinit = localinit;
283 /* Try to set up an alternate signal stack for SIGSEGV handlers.
284 This allows us to handle SIGSEGV signals generated when the
285 normal process stack is exhausted. If this stack is not set
286 up (sigaltstack is unavailable or fails) and a SIGSEGV is
287 generated when the normal stack is exhausted then the program
288 will behave as though no SIGSEGV handler was installed. */
291 setup_alternate_signal_stack (void)
293 #ifdef HAVE_SIGALTSTACK
296 /* FreeBSD versions older than 11.0 use char * for ss_sp instead of
297 void *. This cast works with both types. */
298 ss.ss_sp = (char *) xmalloc (SIGSTKSZ);
299 ss.ss_size = SIGSTKSZ;
302 sigaltstack(&ss, NULL);
306 /* Call command_loop. If it happens to return, pass that through as a
307 non-zero return status. */
310 captured_command_loop (void *data)
312 /* Top-level execution commands can be run in the background from
314 current_ui->async = 1;
316 current_interp_command_loop ();
317 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
318 would clean things up (restoring the cleanup chain) to the state
319 they were just prior to the call. Technically, this means that
320 the do_cleanups() below is redundant. Unfortunately, many FUNCs
321 are not that well behaved. do_cleanups should either be replaced
322 with a do_cleanups call (to cover the problem) or an assertion
323 check to detect bad FUNCs code. */
324 do_cleanups (all_cleanups ());
325 /* If the command_loop returned, normally (rather than threw an
326 error) we try to quit. If the quit is aborted, catch_errors()
327 which called this catch the signal and restart the command
329 quit_command (NULL, instream == stdin);
333 /* Handle command errors thrown from within
334 catch_command_errors/catch_command_errors_const. */
337 handle_command_errors (struct gdb_exception e)
341 exception_print (gdb_stderr, e);
343 /* If any exception escaped to here, we better enable stdin.
344 Otherwise, any command that calls async_disable_stdin, and
345 then throws, will leave stdin inoperable. */
346 async_enable_stdin ();
352 /* Type of the command callback passed to catch_command_errors. */
354 typedef void (catch_command_errors_ftype) (char *, int);
356 /* Wrap calls to commands run before the event loop is started. */
359 catch_command_errors (catch_command_errors_ftype *command,
360 char *arg, int from_tty)
364 int was_sync = sync_execution;
366 command (arg, from_tty);
368 maybe_wait_sync_command_done (was_sync);
370 CATCH (e, RETURN_MASK_ALL)
372 return handle_command_errors (e);
379 /* Type of the command callback passed to catch_command_errors_const. */
381 typedef void (catch_command_errors_const_ftype) (const char *, int);
383 /* Like catch_command_errors, but works with const command and args. */
386 catch_command_errors_const (catch_command_errors_const_ftype *command,
387 const char *arg, int from_tty)
391 int was_sync = sync_execution;
393 command (arg, from_tty);
395 maybe_wait_sync_command_done (was_sync);
397 CATCH (e, RETURN_MASK_ALL)
399 return handle_command_errors (e);
406 /* Type of this option. */
409 /* Option type -x. */
412 /* Option type -ex. */
415 /* Option type -ix. */
418 /* Option type -iex. */
422 /* Arguments of --command option and its counterpart. */
423 typedef struct cmdarg {
424 /* Type of this option. */
425 enum cmdarg_kind type;
427 /* Value of this option - filename or the GDB command itself. String memory
428 is not owned by this structure despite it is 'const'. */
432 /* Define type VEC (cmdarg_s). */
433 DEF_VEC_O (cmdarg_s);
436 captured_main (void *data)
438 struct captured_main_args *context = (struct captured_main_args *) data;
439 int argc = context->argc;
440 char **argv = context->argv;
441 static int quiet = 0;
442 static int set_args = 0;
443 static int inhibit_home_gdbinit = 0;
445 /* Pointers to various arguments from command line. */
447 char *execarg = NULL;
449 char *corearg = NULL;
450 char *pid_or_core_arg = NULL;
454 /* These are static so that we can take their address in an
456 static int print_help;
457 static int print_version;
458 static int print_configuration;
460 /* Pointers to all arguments of --command option. */
461 VEC (cmdarg_s) *cmdarg_vec = NULL;
462 struct cmdarg *cmdarg_p;
464 /* Indices of all arguments of --directory option. */
466 /* Allocated size. */
468 /* Number of elements used. */
471 /* gdb init files. */
472 const char *system_gdbinit;
473 const char *home_gdbinit;
474 const char *local_gdbinit;
478 struct objfile *objfile;
480 struct cleanup *pre_stat_chain;
483 /* Set this before calling make_command_stats_cleanup. */
484 lim_at_start = (char *) sbrk (0);
487 pre_stat_chain = make_command_stats_cleanup (0);
489 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
490 setlocale (LC_MESSAGES, "");
492 #if defined (HAVE_SETLOCALE)
493 setlocale (LC_CTYPE, "");
495 bindtextdomain (PACKAGE, LOCALEDIR);
496 textdomain (PACKAGE);
501 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
503 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
506 saved_command_line = (char *) xstrdup ("");
510 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
511 as a Windows pipe, and Windows buffers on pipes. */
512 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
515 gdb_stdout = stdio_fileopen (stdout);
516 gdb_stderr = stderr_fileopen ();
518 gdb_stdlog = gdb_stderr; /* for moment */
519 gdb_stdtarg = gdb_stderr; /* for moment */
520 gdb_stdin = stdio_fileopen (stdin);
521 gdb_stdtargerr = gdb_stderr; /* for moment */
522 gdb_stdtargin = gdb_stdin; /* for moment */
525 /* On Windows, argv[0] is not necessarily set to absolute form when
526 GDB is found along PATH, without which relocation doesn't work. */
527 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
529 gdb_program_name = xstrdup (argv[0]);
532 /* Prefix warning messages with the command name. */
533 warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
535 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
536 perror_warning_with_name (_("error finding working directory"));
538 current_directory = gdb_dirbuf;
540 /* Set the sysroot path. */
541 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
542 TARGET_SYSTEM_ROOT_RELOCATABLE);
544 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
547 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
550 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
551 DEBUGDIR_RELOCATABLE);
553 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
554 GDB_DATADIR_RELOCATABLE);
556 #ifdef WITH_PYTHON_PATH
558 /* For later use in helping Python find itself. */
559 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
561 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
567 add_substitute_path_rule (RELOC_SRCDIR,
568 make_relative_prefix (gdb_program_name, BINDIR,
572 /* There will always be an interpreter. Either the one passed into
573 this captured main, or one specified by the user at start up, or
574 the console. Initialize the interpreter to the one requested by
576 interpreter_p = xstrdup (context->interpreter_p);
578 /* Parse arguments and options. */
581 /* When var field is 0, use flag field to record the equivalent
582 short option (or arbitrary numbers starting at 10 for those
583 with no equivalent). */
595 static struct option long_options[] =
597 {"tui", no_argument, 0, OPT_TUI},
598 {"dbx", no_argument, &dbx_commands, 1},
599 {"readnow", no_argument, &readnow_symbol_files, 1},
600 {"r", no_argument, &readnow_symbol_files, 1},
601 {"quiet", no_argument, &quiet, 1},
602 {"q", no_argument, &quiet, 1},
603 {"silent", no_argument, &quiet, 1},
604 {"nh", no_argument, &inhibit_home_gdbinit, 1},
605 {"nx", no_argument, &inhibit_gdbinit, 1},
606 {"n", no_argument, &inhibit_gdbinit, 1},
607 {"batch-silent", no_argument, 0, 'B'},
608 {"batch", no_argument, &batch_flag, 1},
610 /* This is a synonym for "--annotate=1". --annotate is now
611 preferred, but keep this here for a long time because people
612 will be running emacses which use --fullname. */
613 {"fullname", no_argument, 0, 'f'},
614 {"f", no_argument, 0, 'f'},
616 {"annotate", required_argument, 0, OPT_ANNOTATE},
617 {"help", no_argument, &print_help, 1},
618 {"se", required_argument, 0, OPT_SE},
619 {"symbols", required_argument, 0, 's'},
620 {"s", required_argument, 0, 's'},
621 {"exec", required_argument, 0, 'e'},
622 {"e", required_argument, 0, 'e'},
623 {"core", required_argument, 0, 'c'},
624 {"c", required_argument, 0, 'c'},
625 {"pid", required_argument, 0, 'p'},
626 {"p", required_argument, 0, 'p'},
627 {"command", required_argument, 0, 'x'},
628 {"eval-command", required_argument, 0, 'X'},
629 {"version", no_argument, &print_version, 1},
630 {"configuration", no_argument, &print_configuration, 1},
631 {"x", required_argument, 0, 'x'},
632 {"ex", required_argument, 0, 'X'},
633 {"init-command", required_argument, 0, OPT_IX},
634 {"init-eval-command", required_argument, 0, OPT_IEX},
635 {"ix", required_argument, 0, OPT_IX},
636 {"iex", required_argument, 0, OPT_IEX},
638 {"tclcommand", required_argument, 0, 'z'},
639 {"enable-external-editor", no_argument, 0, 'y'},
640 {"editor-command", required_argument, 0, 'w'},
642 {"ui", required_argument, 0, 'i'},
643 {"interpreter", required_argument, 0, 'i'},
644 {"i", required_argument, 0, 'i'},
645 {"directory", required_argument, 0, 'd'},
646 {"d", required_argument, 0, 'd'},
647 {"data-directory", required_argument, 0, 'D'},
648 {"D", required_argument, 0, 'D'},
649 {"cd", required_argument, 0, OPT_CD},
650 {"tty", required_argument, 0, 't'},
651 {"baud", required_argument, 0, 'b'},
652 {"b", required_argument, 0, 'b'},
653 {"nw", no_argument, NULL, OPT_NOWINDOWS},
654 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
655 {"w", no_argument, NULL, OPT_WINDOWS},
656 {"windows", no_argument, NULL, OPT_WINDOWS},
657 {"statistics", no_argument, 0, OPT_STATISTICS},
658 {"write", no_argument, &write_files, 1},
659 {"args", no_argument, &set_args, 1},
660 {"l", required_argument, 0, 'l'},
661 {"return-child-result", no_argument, &return_child_result, 1},
662 {0, no_argument, 0, 0}
669 c = getopt_long_only (argc, argv, "",
670 long_options, &option_index);
671 if (c == EOF || set_args)
674 /* Long option that takes an argument. */
675 if (c == 0 && long_options[option_index].flag == 0)
676 c = long_options[option_index].val;
681 /* Long option that just sets a flag. */
691 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
692 annotation_level = atoi (optarg);
695 /* Enable the display of both time and space usage. */
696 set_per_command_time (1);
697 set_per_command_space (1);
700 /* --tui is equivalent to -i=tui. */
702 xfree (interpreter_p);
703 interpreter_p = xstrdup (INTERP_TUI);
705 error (_("%s: TUI mode is not supported"), gdb_program_name);
709 /* FIXME: cagney/2003-03-01: Not sure if this option is
710 actually useful, and if it is, what it should do. */
712 /* --windows is equivalent to -i=insight. */
713 xfree (interpreter_p);
714 interpreter_p = xstrdup (INTERP_INSIGHT);
718 /* -nw is equivalent to -i=console. */
719 xfree (interpreter_p);
720 interpreter_p = xstrdup (INTERP_CONSOLE);
723 annotation_level = 1;
739 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
741 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
746 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
748 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
753 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
755 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
760 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
762 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
766 batch_flag = batch_silent = 1;
767 gdb_stdout = ui_file_new();
770 if (optarg[0] == '\0')
771 error (_("%s: empty path for `--data-directory'"),
773 set_gdb_data_directory (optarg);
774 gdb_datadir_provided = 1;
779 extern int gdbtk_test (char *);
781 if (!gdbtk_test (optarg))
782 error (_("%s: unable to load tclcommand file \"%s\""),
783 gdb_program_name, optarg);
787 /* Backwards compatibility only. */
791 /* Set the external editor commands when gdb is farming out files
792 to be edited by another program. */
793 extern char *external_editor_command;
795 external_editor_command = xstrdup (optarg);
800 xfree (interpreter_p);
801 interpreter_p = xstrdup (optarg);
804 dirarg[ndir++] = optarg;
808 dirarg = (char **) xrealloc ((char *) dirarg,
809 dirsize * sizeof (*dirarg));
823 i = strtol (optarg, &p, 0);
824 if (i == 0 && p == optarg)
825 warning (_("could not set baud rate to `%s'."),
836 i = strtol (optarg, &p, 0);
837 if (i == 0 && p == optarg)
838 warning (_("could not set timeout limit to `%s'."),
846 error (_("Use `%s --help' for a complete list of options."),
855 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
856 setup_alternate_signal_stack ();
858 /* Initialize all files. */
859 gdb_init (gdb_program_name);
861 /* Now that gdb_init has created the initial inferior, we're in
862 position to set args for that inferior. */
865 /* The remaining options are the command-line options for the
866 inferior. The first one is the sym/exec file, and the rest
869 error (_("%s: `--args' specified but no program specified"),
872 symarg = argv[optind];
873 execarg = argv[optind];
875 set_inferior_args_vector (argc - optind, &argv[optind]);
879 /* OK, that's all the options. */
881 /* The first argument, if specified, is the name of the
885 symarg = argv[optind];
886 execarg = argv[optind];
890 /* If the user hasn't already specified a PID or the name of a
891 core file, then a second optional argument is allowed. If
892 present, this argument should be interpreted as either a
893 PID or a core file, whichever works. */
894 if (pidarg == NULL && corearg == NULL && optind < argc)
896 pid_or_core_arg = argv[optind];
900 /* Any argument left on the command line is unexpected and
901 will be ignored. Inform the user. */
903 fprintf_unfiltered (gdb_stderr,
904 _("Excess command line "
905 "arguments ignored. (%s%s)\n"),
907 (optind == argc - 1) ? "" : " ...");
910 /* Lookup gdbinit files. Note that the gdbinit file name may be
911 overriden during file initialization, so get_init_files should be
912 called after gdb_init. */
913 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
915 /* Do these (and anything which might call wrap_here or *_filtered)
916 after initialize_all_files() but before the interpreter has been
917 installed. Otherwize the help/version messages will be eaten by
918 the interpreter's output handler. */
922 print_gdb_version (gdb_stdout);
924 printf_filtered ("\n");
930 print_gdb_help (gdb_stdout);
931 fputs_unfiltered ("\n", gdb_stdout);
935 if (print_configuration)
937 print_gdb_configuration (gdb_stdout);
939 printf_filtered ("\n");
943 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
944 GDB retain the old MI1 interpreter startup behavior. Output the
945 copyright message before the interpreter is installed. That way
946 it isn't encapsulated in MI output. */
947 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
949 /* Print all the junk at the top, with trailing "..." if we are
950 about to read a symbol file (possibly slowly). */
951 print_gdb_version (gdb_stdout);
953 printf_filtered ("..");
955 printf_filtered ("\n");
956 gdb_flush (gdb_stdout); /* Force to screen during slow
960 /* Install the default UI. All the interpreters should have had a
961 look at things by now. Initialize the default interpreter. */
965 struct interp *interp = interp_lookup (current_ui, interpreter_p);
968 error (_("Interpreter `%s' unrecognized"), interpreter_p);
970 if (!interp_set (interp, 1))
971 error (_("Interpreter `%s' failed to initialize."), interpreter_p);
974 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
975 GDB retain the old MI1 interpreter startup behavior. Output the
976 copyright message after the interpreter is installed when it is
977 any sane interpreter. */
978 if (!quiet && !current_interp_named_p (INTERP_MI1))
980 /* Print all the junk at the top, with trailing "..." if we are
981 about to read a symbol file (possibly slowly). */
982 print_gdb_version (gdb_stdout);
984 printf_filtered ("..");
986 printf_filtered ("\n");
987 gdb_flush (gdb_stdout); /* Force to screen during slow
991 /* Set off error and warning messages with a blank line. */
992 xfree (warning_pre_print);
993 warning_pre_print = _("\nwarning: ");
995 /* Read and execute the system-wide gdbinit file, if it exists.
996 This is done *before* all the command line arguments are
997 processed; it sets global parameters, which are independent of
998 what file you are debugging or what directory you are in. */
999 if (system_gdbinit && !inhibit_gdbinit)
1000 catch_command_errors_const (source_script, system_gdbinit, 0);
1002 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
1003 *before* all the command line arguments are processed; it sets
1004 global parameters, which are independent of what file you are
1005 debugging or what directory you are in. */
1007 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
1008 catch_command_errors_const (source_script, home_gdbinit, 0);
1010 /* Process '-ix' and '-iex' options early. */
1011 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1012 switch (cmdarg_p->type)
1014 case CMDARG_INIT_FILE:
1015 catch_command_errors_const (source_script, cmdarg_p->string,
1018 case CMDARG_INIT_COMMAND:
1019 catch_command_errors (execute_command, cmdarg_p->string,
1024 /* Now perform all the actions indicated by the arguments. */
1027 catch_command_errors (cd_command, cdarg, 0);
1030 for (i = 0; i < ndir; i++)
1031 catch_command_errors (directory_switch, dirarg[i], 0);
1034 /* Skip auto-loading section-specified scripts until we've sourced
1035 local_gdbinit (which is often used to augment the source search
1037 save_auto_load = global_auto_load;
1038 global_auto_load = 0;
1042 && strcmp (execarg, symarg) == 0)
1044 /* The exec file and the symbol-file are the same. If we can't
1045 open it, better only print one error message.
1046 catch_command_errors returns non-zero on success! */
1047 if (catch_command_errors_const (exec_file_attach, execarg,
1049 catch_command_errors_const (symbol_file_add_main, symarg,
1054 if (execarg != NULL)
1055 catch_command_errors_const (exec_file_attach, execarg,
1058 catch_command_errors_const (symbol_file_add_main, symarg,
1062 if (corearg && pidarg)
1063 error (_("Can't attach to process and specify "
1064 "a core file at the same time."));
1066 if (corearg != NULL)
1067 catch_command_errors (core_file_command, corearg, !batch_flag);
1068 else if (pidarg != NULL)
1069 catch_command_errors (attach_command, pidarg, !batch_flag);
1070 else if (pid_or_core_arg)
1072 /* The user specified 'gdb program pid' or gdb program core'.
1073 If pid_or_core_arg's first character is a digit, try attach
1074 first and then corefile. Otherwise try just corefile. */
1076 if (isdigit (pid_or_core_arg[0]))
1078 if (catch_command_errors (attach_command, pid_or_core_arg,
1080 catch_command_errors (core_file_command, pid_or_core_arg,
1083 else /* Can't be a pid, better be a corefile. */
1084 catch_command_errors (core_file_command, pid_or_core_arg,
1089 set_inferior_io_terminal (ttyarg);
1091 /* Error messages should no longer be distinguished with extra output. */
1092 warning_pre_print = _("warning: ");
1094 /* Read the .gdbinit file in the current directory, *if* it isn't
1095 the same as the $HOME/.gdbinit file (it should exist, also). */
1098 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1100 if (!inhibit_gdbinit && auto_load_local_gdbinit
1101 && file_is_auto_load_safe (local_gdbinit,
1102 _("auto-load: Loading .gdbinit "
1106 auto_load_local_gdbinit_loaded = 1;
1108 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,
1128 case CMDARG_COMMAND:
1129 catch_command_errors (execute_command, cmdarg_p->string,
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 -q, --quiet, --silent\n\
1232 Do not print version number on startup.\n\n\
1234 fputs_unfiltered (_("\
1235 Operating modes:\n\n\
1236 --batch Exit after processing options.\n\
1237 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1238 --return-child-result\n\
1239 GDB exit code will be the child's exit code.\n\
1240 --configuration Print details about GDB configuration and then exit.\n\
1241 --help Print this message and then exit.\n\
1242 --version Print version information and then exit.\n\n\
1243 Remote debugging options:\n\n\
1244 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1245 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1247 --cd=DIR Change current directory to DIR.\n\
1248 --data-directory=DIR, -D\n\
1249 Set GDB's data-directory to DIR.\n\
1251 fputs_unfiltered (_("\n\
1252 At startup, GDB reads the following init files and executes their commands:\n\
1255 fprintf_unfiltered (stream, _("\
1256 * system-wide init file: %s\n\
1257 "), system_gdbinit);
1259 fprintf_unfiltered (stream, _("\
1260 * user-specific init file: %s\n\
1263 fprintf_unfiltered (stream, _("\
1264 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1266 fputs_unfiltered (_("\n\
1267 For more information, type \"help\" from within GDB, or consult the\n\
1268 GDB manual (available as on-line info or a printed manual).\n\
1270 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1271 fprintf_unfiltered (stream, _("\
1272 Report bugs to \"%s\".\n\
1273 "), REPORT_BUGS_TO);