1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "exceptions.h"
30 #include <sys/types.h>
35 #include "event-loop.h"
41 #include "cli/cli-cmds.h"
43 #include "auto-load.h"
46 #include "filenames.h"
47 #include "filestuff.h"
50 /* The selected interpreter. This will be used as a set command
51 variable, so it should always be malloc'ed - since
52 do_setshow_command will free it. */
55 /* Whether xdb commands will be handled. */
58 /* Whether dbx commands will be handled. */
61 /* System root path, used to find libraries etc. */
62 char *gdb_sysroot = 0;
64 /* GDB datadir, used to store data files. */
65 char *gdb_datadir = 0;
67 /* Non-zero if GDB_DATADIR was provided on the command line.
68 This doesn't track whether data-directory is set later from the
69 command line, but we don't reread system.gdbinit when that happens. */
70 static int gdb_datadir_provided = 0;
72 /* If gdb was configured with --with-python=/path,
73 the possibly relocated path to python's lib directory. */
74 char *python_libdir = 0;
76 struct ui_file *gdb_stdout;
77 struct ui_file *gdb_stderr;
78 struct ui_file *gdb_stdlog;
79 struct ui_file *gdb_stdin;
80 /* Target IO streams. */
81 struct ui_file *gdb_stdtargin;
82 struct ui_file *gdb_stdtarg;
83 struct ui_file *gdb_stdtargerr;
85 /* True if --batch or --batch-silent was seen. */
88 /* Support for the --batch-silent option. */
91 /* Support for --return-child-result option.
92 Set the default to -1 to return error in the case
93 that the program does not run or does not complete. */
94 int return_child_result = 0;
95 int return_child_result_value = -1;
98 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
99 static char *gdb_program_name;
101 /* Return read only pointer to GDB_PROGRAM_NAME. */
103 get_gdb_program_name (void)
105 return gdb_program_name;
108 static void print_gdb_help (struct ui_file *);
110 /* Set the data-directory parameter to NEW_DATADIR.
111 If NEW_DATADIR is not a directory then a warning is printed.
112 We don't signal an error for backward compatibility. */
115 set_gdb_data_directory (const char *new_datadir)
119 if (stat (new_datadir, &st) < 0)
121 int save_errno = errno;
123 fprintf_unfiltered (gdb_stderr, "Warning: ");
124 print_sys_errmsg (new_datadir, save_errno);
126 else if (!S_ISDIR (st.st_mode))
127 warning (_("%s is not a directory."), new_datadir);
130 gdb_datadir = gdb_realpath (new_datadir);
132 /* gdb_realpath won't return an absolute path if the path doesn't exist,
133 but we still want to record an absolute path here. If the user entered
134 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
135 isn't canonical, but that's ok. */
136 if (!IS_ABSOLUTE_PATH (gdb_datadir))
138 char *abs_datadir = gdb_abspath (gdb_datadir);
141 gdb_datadir = abs_datadir;
145 /* Relocate a file or directory. PROGNAME is the name by which gdb
146 was invoked (i.e., argv[0]). INITIAL is the default value for the
147 file or directory. FLAG is true if the value is relocatable, false
148 otherwise. Returns a newly allocated string; this may return NULL
149 under the same conditions as make_relative_prefix. */
152 relocate_path (const char *progname, const char *initial, int flag)
155 return make_relative_prefix (progname, BINDIR, initial);
156 return xstrdup (initial);
159 /* Like relocate_path, but specifically checks for a directory.
160 INITIAL is relocated according to the rules of relocate_path. If
161 the result is a directory, it is used; otherwise, INITIAL is used.
162 The chosen directory is then canonicalized using lrealpath. This
163 function always returns a newly-allocated string. */
166 relocate_gdb_directory (const char *initial, int flag)
170 dir = relocate_path (gdb_program_name, initial, flag);
175 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
182 dir = xstrdup (initial);
184 /* Canonicalize the directory. */
187 char *canon_sysroot = lrealpath (dir);
199 /* Compute the locations of init files that GDB should source and
200 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
201 there is no system gdbinit (resp. home gdbinit and local gdbinit)
202 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
203 LOCAL_GDBINIT) is set to NULL. */
205 get_init_files (const char **system_gdbinit,
206 const char **home_gdbinit,
207 const char **local_gdbinit)
209 static const char *sysgdbinit = NULL;
210 static char *homeinit = NULL;
211 static const char *localinit = NULL;
212 static int initialized = 0;
216 struct stat homebuf, cwdbuf, s;
219 if (SYSTEM_GDBINIT[0])
221 int datadir_len = strlen (GDB_DATADIR);
222 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
223 char *relocated_sysgdbinit;
225 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
226 has been provided, search for SYSTEM_GDBINIT there. */
227 if (gdb_datadir_provided
228 && datadir_len < sys_gdbinit_len
229 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
230 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
232 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
234 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
237 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
239 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
241 xfree (tmp_sys_gdbinit);
245 relocated_sysgdbinit = relocate_path (gdb_program_name,
247 SYSTEM_GDBINIT_RELOCATABLE);
249 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
250 sysgdbinit = relocated_sysgdbinit;
252 xfree (relocated_sysgdbinit);
255 homedir = getenv ("HOME");
257 /* If the .gdbinit file in the current directory is the same as
258 the $HOME/.gdbinit file, it should not be sourced. homebuf
259 and cwdbuf are used in that purpose. Make sure that the stats
260 are zero in case one of them fails (this guarantees that they
261 won't match if either exists). */
263 memset (&homebuf, 0, sizeof (struct stat));
264 memset (&cwdbuf, 0, sizeof (struct stat));
268 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
269 if (stat (homeinit, &homebuf) != 0)
276 if (stat (gdbinit, &cwdbuf) == 0)
279 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
280 sizeof (struct stat)))
287 *system_gdbinit = sysgdbinit;
288 *home_gdbinit = homeinit;
289 *local_gdbinit = localinit;
292 /* Try to set up an alternate signal stack for SIGSEGV handlers.
293 This allows us to handle SIGSEGV signals generated when the
294 normal process stack is exhausted. If this stack is not set
295 up (sigaltstack is unavailable or fails) and a SIGSEGV is
296 generated when the normal stack is exhausted then the program
297 will behave as though no SIGSEGV handler was installed. */
300 setup_alternate_signal_stack (void)
302 #ifdef HAVE_SIGALTSTACK
305 ss.ss_sp = xmalloc (SIGSTKSZ);
306 ss.ss_size = SIGSTKSZ;
309 sigaltstack(&ss, NULL);
313 /* Call command_loop. If it happens to return, pass that through as a
314 non-zero return status. */
317 captured_command_loop (void *data)
319 /* Top-level execution commands can be run in the background from
321 interpreter_async = 1;
323 current_interp_command_loop ();
324 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
325 would clean things up (restoring the cleanup chain) to the state
326 they were just prior to the call. Technically, this means that
327 the do_cleanups() below is redundant. Unfortunately, many FUNCs
328 are not that well behaved. do_cleanups should either be replaced
329 with a do_cleanups call (to cover the problem) or an assertion
330 check to detect bad FUNCs code. */
331 do_cleanups (all_cleanups ());
332 /* If the command_loop returned, normally (rather than threw an
333 error) we try to quit. If the quit is aborted, catch_errors()
334 which called this catch the signal and restart the command
336 quit_command (NULL, instream == stdin);
340 /* Type of the command callback passed to catch_command_errors. */
342 typedef void (catch_command_errors_ftype) (char *, int);
344 /* Wrap calls to commands run before the event loop is started. */
347 catch_command_errors (catch_command_errors_ftype *command,
348 char *arg, int from_tty, return_mask mask)
350 volatile struct gdb_exception e;
354 command (arg, from_tty);
356 exception_print (gdb_stderr, e);
362 /* Type of the command callback passed to catch_command_errors_const. */
364 typedef void (catch_command_errors_const_ftype) (const char *, int);
366 /* Like catch_command_errors, but works with const command and args. */
369 catch_command_errors_const (catch_command_errors_const_ftype *command,
370 const char *arg, int from_tty, return_mask mask)
372 volatile struct gdb_exception e;
376 command (arg, from_tty);
378 exception_print (gdb_stderr, e);
384 /* Arguments of --command option and its counterpart. */
385 typedef struct cmdarg {
386 /* Type of this option. */
388 /* Option type -x. */
391 /* Option type -ex. */
394 /* Option type -ix. */
397 /* Option type -iex. */
401 /* Value of this option - filename or the GDB command itself. String memory
402 is not owned by this structure despite it is 'const'. */
406 /* Define type VEC (cmdarg_s). */
407 DEF_VEC_O (cmdarg_s);
410 captured_main (void *data)
412 struct captured_main_args *context = data;
413 int argc = context->argc;
414 char **argv = context->argv;
415 static int quiet = 0;
416 static int set_args = 0;
417 static int inhibit_home_gdbinit = 0;
419 /* Pointers to various arguments from command line. */
421 char *execarg = NULL;
423 char *corearg = NULL;
424 char *pid_or_core_arg = NULL;
428 /* These are static so that we can take their address in an
430 static int print_help;
431 static int print_version;
432 static int print_configuration;
434 /* Pointers to all arguments of --command option. */
435 VEC (cmdarg_s) *cmdarg_vec = NULL;
436 struct cmdarg *cmdarg_p;
438 /* Indices of all arguments of --directory option. */
440 /* Allocated size. */
442 /* Number of elements used. */
445 /* gdb init files. */
446 const char *system_gdbinit;
447 const char *home_gdbinit;
448 const char *local_gdbinit;
452 struct objfile *objfile;
454 struct cleanup *pre_stat_chain;
457 /* Set this before calling make_command_stats_cleanup. */
458 lim_at_start = (char *) sbrk (0);
461 pre_stat_chain = make_command_stats_cleanup (0);
463 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
464 setlocale (LC_MESSAGES, "");
466 #if defined (HAVE_SETLOCALE)
467 setlocale (LC_CTYPE, "");
469 bindtextdomain (PACKAGE, LOCALEDIR);
470 textdomain (PACKAGE);
475 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
477 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
481 saved_command_line = (char *) xmalloc (saved_command_line_size);
482 saved_command_line[0] = '\0';
486 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
487 as a Windows pipe, and Windows buffers on pipes. */
488 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
491 gdb_stdout = stdio_fileopen (stdout);
492 gdb_stderr = stderr_fileopen ();
494 gdb_stdlog = gdb_stderr; /* for moment */
495 gdb_stdtarg = gdb_stderr; /* for moment */
496 gdb_stdin = stdio_fileopen (stdin);
497 gdb_stdtargerr = gdb_stderr; /* for moment */
498 gdb_stdtargin = gdb_stdin; /* for moment */
501 /* On Windows, argv[0] is not necessarily set to absolute form when
502 GDB is found along PATH, without which relocation doesn't work. */
503 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
505 gdb_program_name = xstrdup (argv[0]);
508 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
509 /* Don't use *_filtered or warning() (which relies on
510 current_target) until after initialize_all_files(). */
511 fprintf_unfiltered (gdb_stderr,
512 _("%s: warning: error finding "
513 "working directory: %s\n"),
514 argv[0], safe_strerror (errno));
516 current_directory = gdb_dirbuf;
518 /* Set the sysroot path. */
519 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
520 TARGET_SYSTEM_ROOT_RELOCATABLE);
522 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
523 DEBUGDIR_RELOCATABLE);
525 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
526 GDB_DATADIR_RELOCATABLE);
528 #ifdef WITH_PYTHON_PATH
530 /* For later use in helping Python find itself. */
531 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
533 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
539 add_substitute_path_rule (RELOC_SRCDIR,
540 make_relative_prefix (gdb_program_name, BINDIR,
544 /* There will always be an interpreter. Either the one passed into
545 this captured main, or one specified by the user at start up, or
546 the console. Initialize the interpreter to the one requested by
548 interpreter_p = xstrdup (context->interpreter_p);
550 /* Parse arguments and options. */
553 /* When var field is 0, use flag field to record the equivalent
554 short option (or arbitrary numbers starting at 10 for those
555 with no equivalent). */
567 static struct option long_options[] =
569 {"tui", no_argument, 0, OPT_TUI},
570 {"xdb", no_argument, &xdb_commands, 1},
571 {"dbx", no_argument, &dbx_commands, 1},
572 {"readnow", no_argument, &readnow_symbol_files, 1},
573 {"r", no_argument, &readnow_symbol_files, 1},
574 {"quiet", no_argument, &quiet, 1},
575 {"q", no_argument, &quiet, 1},
576 {"silent", no_argument, &quiet, 1},
577 {"nh", no_argument, &inhibit_home_gdbinit, 1},
578 {"nx", no_argument, &inhibit_gdbinit, 1},
579 {"n", no_argument, &inhibit_gdbinit, 1},
580 {"batch-silent", no_argument, 0, 'B'},
581 {"batch", no_argument, &batch_flag, 1},
583 /* This is a synonym for "--annotate=1". --annotate is now
584 preferred, but keep this here for a long time because people
585 will be running emacses which use --fullname. */
586 {"fullname", no_argument, 0, 'f'},
587 {"f", no_argument, 0, 'f'},
589 {"annotate", required_argument, 0, OPT_ANNOTATE},
590 {"help", no_argument, &print_help, 1},
591 {"se", required_argument, 0, OPT_SE},
592 {"symbols", required_argument, 0, 's'},
593 {"s", required_argument, 0, 's'},
594 {"exec", required_argument, 0, 'e'},
595 {"e", required_argument, 0, 'e'},
596 {"core", required_argument, 0, 'c'},
597 {"c", required_argument, 0, 'c'},
598 {"pid", required_argument, 0, 'p'},
599 {"p", required_argument, 0, 'p'},
600 {"command", required_argument, 0, 'x'},
601 {"eval-command", required_argument, 0, 'X'},
602 {"version", no_argument, &print_version, 1},
603 {"configuration", no_argument, &print_configuration, 1},
604 {"x", required_argument, 0, 'x'},
605 {"ex", required_argument, 0, 'X'},
606 {"init-command", required_argument, 0, OPT_IX},
607 {"init-eval-command", required_argument, 0, OPT_IEX},
608 {"ix", required_argument, 0, OPT_IX},
609 {"iex", required_argument, 0, OPT_IEX},
611 {"tclcommand", required_argument, 0, 'z'},
612 {"enable-external-editor", no_argument, 0, 'y'},
613 {"editor-command", required_argument, 0, 'w'},
615 {"ui", required_argument, 0, 'i'},
616 {"interpreter", required_argument, 0, 'i'},
617 {"i", required_argument, 0, 'i'},
618 {"directory", required_argument, 0, 'd'},
619 {"d", required_argument, 0, 'd'},
620 {"data-directory", required_argument, 0, 'D'},
621 {"D", required_argument, 0, 'D'},
622 {"cd", required_argument, 0, OPT_CD},
623 {"tty", required_argument, 0, 't'},
624 {"baud", required_argument, 0, 'b'},
625 {"b", required_argument, 0, 'b'},
626 {"nw", no_argument, NULL, OPT_NOWINDOWS},
627 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
628 {"w", no_argument, NULL, OPT_WINDOWS},
629 {"windows", no_argument, NULL, OPT_WINDOWS},
630 {"statistics", no_argument, 0, OPT_STATISTICS},
631 {"write", no_argument, &write_files, 1},
632 {"args", no_argument, &set_args, 1},
633 {"l", required_argument, 0, 'l'},
634 {"return-child-result", no_argument, &return_child_result, 1},
635 {0, no_argument, 0, 0}
642 c = getopt_long_only (argc, argv, "",
643 long_options, &option_index);
644 if (c == EOF || set_args)
647 /* Long option that takes an argument. */
648 if (c == 0 && long_options[option_index].flag == 0)
649 c = long_options[option_index].val;
654 /* Long option that just sets a flag. */
664 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
665 annotation_level = atoi (optarg);
668 /* Enable the display of both time and space usage. */
669 set_per_command_time (1);
670 set_per_command_space (1);
673 /* --tui is equivalent to -i=tui. */
675 xfree (interpreter_p);
676 interpreter_p = xstrdup (INTERP_TUI);
678 fprintf_unfiltered (gdb_stderr,
679 _("%s: TUI mode is not supported\n"),
685 /* FIXME: cagney/2003-03-01: Not sure if this option is
686 actually useful, and if it is, what it should do. */
688 /* --windows is equivalent to -i=insight. */
689 xfree (interpreter_p);
690 interpreter_p = xstrdup (INTERP_INSIGHT);
694 /* -nw is equivalent to -i=console. */
695 xfree (interpreter_p);
696 interpreter_p = xstrdup (INTERP_CONSOLE);
699 annotation_level = 1;
715 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
717 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
722 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
724 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
729 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
731 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
736 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
738 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
742 batch_flag = batch_silent = 1;
743 gdb_stdout = ui_file_new();
746 if (optarg[0] == '\0')
748 fprintf_unfiltered (gdb_stderr,
749 _("%s: empty path for"
750 " `--data-directory'\n"),
754 set_gdb_data_directory (optarg);
755 gdb_datadir_provided = 1;
760 extern int gdbtk_test (char *);
762 if (!gdbtk_test (optarg))
764 fprintf_unfiltered (gdb_stderr,
765 _("%s: unable to load "
766 "tclcommand file \"%s\""),
773 /* Backwards compatibility only. */
777 /* Set the external editor commands when gdb is farming out files
778 to be edited by another program. */
779 extern char *external_editor_command;
781 external_editor_command = xstrdup (optarg);
786 xfree (interpreter_p);
787 interpreter_p = xstrdup (optarg);
790 dirarg[ndir++] = optarg;
794 dirarg = (char **) xrealloc ((char *) dirarg,
795 dirsize * sizeof (*dirarg));
809 i = strtol (optarg, &p, 0);
810 if (i == 0 && p == optarg)
812 /* Don't use *_filtered or warning() (which relies on
813 current_target) until after initialize_all_files(). */
817 _("warning: could not set baud rate to `%s'.\n"), optarg);
827 i = strtol (optarg, &p, 0);
828 if (i == 0 && p == optarg)
830 /* Don't use *_filtered or warning() (which relies on
831 current_target) until after initialize_all_files(). */
833 fprintf_unfiltered (gdb_stderr,
834 _("warning: could not set "
835 "timeout limit to `%s'.\n"), optarg);
842 fprintf_unfiltered (gdb_stderr,
843 _("Use `%s --help' for a "
844 "complete list of options.\n"),
854 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
855 setup_alternate_signal_stack ();
857 /* Initialize all files. Give the interpreter a chance to take
858 control of the console via the deprecated_init_ui_hook (). */
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
870 fprintf_unfiltered (gdb_stderr,
871 _("%s: `--args' specified but "
872 "no program specified\n"),
876 symarg = argv[optind];
877 execarg = argv[optind];
879 set_inferior_args_vector (argc - optind, &argv[optind]);
883 /* OK, that's all the options. */
885 /* The first argument, if specified, is the name of the
889 symarg = argv[optind];
890 execarg = argv[optind];
894 /* If the user hasn't already specified a PID or the name of a
895 core file, then a second optional argument is allowed. If
896 present, this argument should be interpreted as either a
897 PID or a core file, whichever works. */
898 if (pidarg == NULL && corearg == NULL && optind < argc)
900 pid_or_core_arg = argv[optind];
904 /* Any argument left on the command line is unexpected and
905 will be ignored. Inform the user. */
907 fprintf_unfiltered (gdb_stderr,
908 _("Excess command line "
909 "arguments ignored. (%s%s)\n"),
911 (optind == argc - 1) ? "" : " ...");
914 /* Lookup gdbinit files. Note that the gdbinit file name may be
915 overriden during file initialization, so get_init_files should be
916 called after gdb_init. */
917 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
919 /* Do these (and anything which might call wrap_here or *_filtered)
920 after initialize_all_files() but before the interpreter has been
921 installed. Otherwize the help/version messages will be eaten by
922 the interpreter's output handler. */
926 print_gdb_version (gdb_stdout);
928 printf_filtered ("\n");
934 print_gdb_help (gdb_stdout);
935 fputs_unfiltered ("\n", gdb_stdout);
939 if (print_configuration)
941 print_gdb_configuration (gdb_stdout);
943 printf_filtered ("\n");
947 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
948 GDB retain the old MI1 interpreter startup behavior. Output the
949 copyright message before the interpreter is installed. That way
950 it isn't encapsulated in MI output. */
951 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
953 /* Print all the junk at the top, with trailing "..." if we are
954 about to read a symbol file (possibly slowly). */
955 print_gdb_version (gdb_stdout);
957 printf_filtered ("..");
959 printf_filtered ("\n");
960 gdb_flush (gdb_stdout); /* Force to screen during slow
964 /* Install the default UI. All the interpreters should have had a
965 look at things by now. Initialize the default interpreter. */
969 struct interp *interp = interp_lookup (interpreter_p);
972 error (_("Interpreter `%s' unrecognized"), interpreter_p);
974 if (!interp_set (interp, 1))
976 fprintf_unfiltered (gdb_stderr,
977 "Interpreter `%s' failed to initialize.\n",
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 warning_pre_print = _("\nwarning: ");
1003 /* Read and execute the system-wide gdbinit file, if it exists.
1004 This is done *before* all the command line arguments are
1005 processed; it sets global parameters, which are independent of
1006 what file you are debugging or what directory you are in. */
1007 if (system_gdbinit && !inhibit_gdbinit)
1008 catch_command_errors_const (source_script, system_gdbinit,
1009 0, RETURN_MASK_ALL);
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,
1018 home_gdbinit, 0, RETURN_MASK_ALL);
1020 /* Process '-ix' and '-iex' options early. */
1021 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1022 switch (cmdarg_p->type)
1024 case CMDARG_INIT_FILE:
1025 catch_command_errors_const (source_script, cmdarg_p->string,
1026 !batch_flag, RETURN_MASK_ALL);
1028 case CMDARG_INIT_COMMAND:
1029 catch_command_errors (execute_command, cmdarg_p->string,
1030 !batch_flag, RETURN_MASK_ALL);
1034 /* Now perform all the actions indicated by the arguments. */
1037 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
1040 for (i = 0; i < ndir; i++)
1041 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
1044 /* Skip auto-loading section-specified scripts until we've sourced
1045 local_gdbinit (which is often used to augment the source search
1047 save_auto_load = global_auto_load;
1048 global_auto_load = 0;
1052 && strcmp (execarg, symarg) == 0)
1054 /* The exec file and the symbol-file are the same. If we can't
1055 open it, better only print one error message.
1056 catch_command_errors returns non-zero on success! */
1057 if (catch_command_errors (exec_file_attach, execarg,
1058 !batch_flag, RETURN_MASK_ALL))
1059 catch_command_errors_const (symbol_file_add_main, symarg,
1060 !batch_flag, RETURN_MASK_ALL);
1064 if (execarg != NULL)
1065 catch_command_errors (exec_file_attach, execarg,
1066 !batch_flag, RETURN_MASK_ALL);
1068 catch_command_errors_const (symbol_file_add_main, symarg,
1069 !batch_flag, RETURN_MASK_ALL);
1072 if (corearg && pidarg)
1073 error (_("Can't attach to process and specify "
1074 "a core file at the same time."));
1076 if (corearg != NULL)
1077 catch_command_errors (core_file_command, corearg,
1078 !batch_flag, RETURN_MASK_ALL);
1079 else if (pidarg != NULL)
1080 catch_command_errors (attach_command, pidarg,
1081 !batch_flag, RETURN_MASK_ALL);
1082 else if (pid_or_core_arg)
1084 /* The user specified 'gdb program pid' or gdb program core'.
1085 If pid_or_core_arg's first character is a digit, try attach
1086 first and then corefile. Otherwise try just corefile. */
1088 if (isdigit (pid_or_core_arg[0]))
1090 if (catch_command_errors (attach_command, pid_or_core_arg,
1091 !batch_flag, RETURN_MASK_ALL) == 0)
1092 catch_command_errors (core_file_command, pid_or_core_arg,
1093 !batch_flag, RETURN_MASK_ALL);
1095 else /* Can't be a pid, better be a corefile. */
1096 catch_command_errors (core_file_command, pid_or_core_arg,
1097 !batch_flag, RETURN_MASK_ALL);
1101 set_inferior_io_terminal (ttyarg);
1103 /* Error messages should no longer be distinguished with extra output. */
1104 warning_pre_print = _("warning: ");
1106 /* Read the .gdbinit file in the current directory, *if* it isn't
1107 the same as the $HOME/.gdbinit file (it should exist, also). */
1110 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1112 if (!inhibit_gdbinit && auto_load_local_gdbinit
1113 && file_is_auto_load_safe (local_gdbinit,
1114 _("auto-load: Loading .gdbinit "
1118 auto_load_local_gdbinit_loaded = 1;
1120 catch_command_errors_const (source_script, local_gdbinit, 0,
1125 /* Now that all .gdbinit's have been read and all -d options have been
1126 processed, we can read any scripts mentioned in SYMARG.
1127 We wait until now because it is common to add to the source search
1128 path in local_gdbinit. */
1129 global_auto_load = save_auto_load;
1130 ALL_OBJFILES (objfile)
1131 load_auto_scripts_for_objfile (objfile);
1133 /* Process '-x' and '-ex' options. */
1134 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1135 switch (cmdarg_p->type)
1138 catch_command_errors_const (source_script, cmdarg_p->string,
1139 !batch_flag, RETURN_MASK_ALL);
1141 case CMDARG_COMMAND:
1142 catch_command_errors (execute_command, cmdarg_p->string,
1143 !batch_flag, RETURN_MASK_ALL);
1147 /* Read in the old history after all the command files have been
1153 /* We have hit the end of the batch file. */
1154 quit_force (NULL, 0);
1157 /* Show time and/or space usage. */
1158 do_cleanups (pre_stat_chain);
1160 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1161 moving this loop and the code found in captured_command_loop()
1162 into the command_loop() proper. The main thing holding back that
1163 change - SET_TOP_LEVEL() - has been eliminated. */
1166 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1168 /* No exit -- exit is through quit_command. */
1172 gdb_main (struct captured_main_args *args)
1174 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1175 /* The only way to end up here is by an error (normal exit is
1176 handled by quit_force()), hence always return an error status. */
1181 /* Don't use *_filtered for printing help. We don't want to prompt
1182 for continue no matter how small the screen or how much we're going
1186 print_gdb_help (struct ui_file *stream)
1188 const char *system_gdbinit;
1189 const char *home_gdbinit;
1190 const char *local_gdbinit;
1192 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1194 /* Note: The options in the list below are only approximately sorted
1195 in the alphabetical order, so as to group closely related options
1197 fputs_unfiltered (_("\
1198 This is the GNU debugger. Usage:\n\n\
1199 gdb [options] [executable-file [core-file or process-id]]\n\
1200 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1202 fputs_unfiltered (_("\
1203 Selection of debuggee and its files:\n\n\
1204 --args Arguments after executable-file are passed to inferior\n\
1205 --core=COREFILE Analyze the core dump COREFILE.\n\
1206 --exec=EXECFILE Use EXECFILE as the executable.\n\
1207 --pid=PID Attach to running process PID.\n\
1208 --directory=DIR Search for source files in DIR.\n\
1209 --se=FILE Use FILE as symbol file and executable file.\n\
1210 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1211 --readnow Fully read symbol files on first access.\n\
1212 --write Set writing into executable and core files.\n\n\
1214 fputs_unfiltered (_("\
1215 Initial commands and command files:\n\n\
1216 --command=FILE, -x Execute GDB commands from FILE.\n\
1217 --init-command=FILE, -ix\n\
1218 Like -x but execute commands before loading inferior.\n\
1219 --eval-command=COMMAND, -ex\n\
1220 Execute a single GDB command.\n\
1221 May be used multiple times and in conjunction\n\
1223 --init-eval-command=COMMAND, -iex\n\
1224 Like -ex but before loading inferior.\n\
1225 --nh Do not read ~/.gdbinit.\n\
1226 --nx Do not read any .gdbinit files in any directory.\n\n\
1228 fputs_unfiltered (_("\
1229 Output and user interface control:\n\n\
1230 --fullname Output information used by emacs-GDB interface.\n\
1231 --interpreter=INTERP\n\
1232 Select a specific interpreter / user interface\n\
1233 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1234 -w Use the GUI interface.\n\
1235 --nw Do not use the GUI interface.\n\
1238 fputs_unfiltered (_("\
1239 --tui Use a terminal user interface.\n\
1242 fputs_unfiltered (_("\
1243 --dbx DBX compatibility mode.\n\
1244 --xdb XDB compatibility mode.\n\
1245 -q, --quiet, --silent\n\
1246 Do not print version number on startup.\n\n\
1248 fputs_unfiltered (_("\
1249 Operating modes:\n\n\
1250 --batch Exit after processing options.\n\
1251 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1252 --return-child-result\n\
1253 GDB exit code will be the child's exit code.\n\
1254 --configuration Print details about GDB configuration and then exit.\n\
1255 --help Print this message and then exit.\n\
1256 --version Print version information and then exit.\n\n\
1257 Remote debugging options:\n\n\
1258 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1259 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1261 --cd=DIR Change current directory to DIR.\n\
1262 --data-directory=DIR, -D\n\
1263 Set GDB's data-directory to DIR.\n\
1265 fputs_unfiltered (_("\n\
1266 At startup, GDB reads the following init files and executes their commands:\n\
1269 fprintf_unfiltered (stream, _("\
1270 * system-wide init file: %s\n\
1271 "), system_gdbinit);
1273 fprintf_unfiltered (stream, _("\
1274 * user-specific init file: %s\n\
1277 fprintf_unfiltered (stream, _("\
1278 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1280 fputs_unfiltered (_("\n\
1281 For more information, type \"help\" from within GDB, or consult the\n\
1282 GDB manual (available as on-line info or a printed manual).\n\
1284 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1285 fprintf_unfiltered (stream, _("\
1286 Report bugs to \"%s\".\n\
1287 "), REPORT_BUGS_TO);