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 struct ui *ui = current_ui;
314 /* Top-level execution commands can be run in the background from
316 current_ui->async = 1;
318 /* Give the interpreter a chance to print a prompt, if necessary */
319 if (ui->prompt_state != PROMPT_BLOCKED)
320 interp_pre_command_loop (top_level_interpreter ());
322 /* Now it's time to start the event loop. */
325 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
326 would clean things up (restoring the cleanup chain) to the state
327 they were just prior to the call. Technically, this means that
328 the do_cleanups() below is redundant. Unfortunately, many FUNCs
329 are not that well behaved. do_cleanups should either be replaced
330 with a do_cleanups call (to cover the problem) or an assertion
331 check to detect bad FUNCs code. */
332 do_cleanups (all_cleanups ());
333 /* If the command_loop returned, normally (rather than threw an
334 error) we try to quit. If the quit is aborted, catch_errors()
335 which called this catch the signal and restart the command
337 quit_command (NULL, ui->instream == stdin);
341 /* Handle command errors thrown from within
342 catch_command_errors/catch_command_errors_const. */
345 handle_command_errors (struct gdb_exception e)
349 exception_print (gdb_stderr, e);
351 /* If any exception escaped to here, we better enable stdin.
352 Otherwise, any command that calls async_disable_stdin, and
353 then throws, will leave stdin inoperable. */
354 async_enable_stdin ();
360 /* Type of the command callback passed to catch_command_errors. */
362 typedef void (catch_command_errors_ftype) (char *, int);
364 /* Wrap calls to commands run before the event loop is started. */
367 catch_command_errors (catch_command_errors_ftype *command,
368 char *arg, int from_tty)
372 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
374 command (arg, from_tty);
376 maybe_wait_sync_command_done (was_sync);
378 CATCH (e, RETURN_MASK_ALL)
380 return handle_command_errors (e);
387 /* Type of the command callback passed to catch_command_errors_const. */
389 typedef void (catch_command_errors_const_ftype) (const char *, int);
391 /* Like catch_command_errors, but works with const command and args. */
394 catch_command_errors_const (catch_command_errors_const_ftype *command,
395 const char *arg, int from_tty)
399 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
401 command (arg, from_tty);
403 maybe_wait_sync_command_done (was_sync);
405 CATCH (e, RETURN_MASK_ALL)
407 return handle_command_errors (e);
414 /* Type of this option. */
417 /* Option type -x. */
420 /* Option type -ex. */
423 /* Option type -ix. */
426 /* Option type -iex. */
430 /* Arguments of --command option and its counterpart. */
431 typedef struct cmdarg {
432 /* Type of this option. */
433 enum cmdarg_kind type;
435 /* Value of this option - filename or the GDB command itself. String memory
436 is not owned by this structure despite it is 'const'. */
440 /* Define type VEC (cmdarg_s). */
441 DEF_VEC_O (cmdarg_s);
444 captured_main (void *data)
446 struct ui *ui = current_ui;
447 struct captured_main_args *context = (struct captured_main_args *) data;
448 int argc = context->argc;
449 char **argv = context->argv;
450 static int quiet = 0;
451 static int set_args = 0;
452 static int inhibit_home_gdbinit = 0;
454 /* Pointers to various arguments from command line. */
456 char *execarg = NULL;
458 char *corearg = NULL;
459 char *pid_or_core_arg = NULL;
463 /* These are static so that we can take their address in an
465 static int print_help;
466 static int print_version;
467 static int print_configuration;
469 /* Pointers to all arguments of --command option. */
470 VEC (cmdarg_s) *cmdarg_vec = NULL;
471 struct cmdarg *cmdarg_p;
473 /* Indices of all arguments of --directory option. */
475 /* Allocated size. */
477 /* Number of elements used. */
480 /* gdb init files. */
481 const char *system_gdbinit;
482 const char *home_gdbinit;
483 const char *local_gdbinit;
487 struct objfile *objfile;
489 struct cleanup *pre_stat_chain;
492 /* Set this before calling make_command_stats_cleanup. */
493 lim_at_start = (char *) sbrk (0);
496 pre_stat_chain = make_command_stats_cleanup (0);
498 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
499 setlocale (LC_MESSAGES, "");
501 #if defined (HAVE_SETLOCALE)
502 setlocale (LC_CTYPE, "");
504 bindtextdomain (PACKAGE, LOCALEDIR);
505 textdomain (PACKAGE);
510 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
512 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
515 saved_command_line = (char *) xstrdup ("");
517 ui->instream = stdin;
518 ui->outstream = stdout;
519 ui->errstream = stderr;
521 ui->input_fd = fileno (stdin);
523 ui->prompt_state = PROMPT_NEEDED;
526 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
527 as a Windows pipe, and Windows buffers on pipes. */
528 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
531 gdb_stdout = stdio_fileopen (stdout);
532 gdb_stderr = stderr_fileopen (stderr);
534 gdb_stdlog = gdb_stderr; /* for moment */
535 gdb_stdtarg = gdb_stderr; /* for moment */
536 gdb_stdin = stdio_fileopen (stdin);
537 gdb_stdtargerr = gdb_stderr; /* for moment */
538 gdb_stdtargin = gdb_stdin; /* for moment */
541 /* On Windows, argv[0] is not necessarily set to absolute form when
542 GDB is found along PATH, without which relocation doesn't work. */
543 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
545 gdb_program_name = xstrdup (argv[0]);
548 /* Prefix warning messages with the command name. */
549 warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
551 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
552 perror_warning_with_name (_("error finding working directory"));
554 current_directory = gdb_dirbuf;
556 /* Set the sysroot path. */
557 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
558 TARGET_SYSTEM_ROOT_RELOCATABLE);
560 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
563 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
566 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
567 DEBUGDIR_RELOCATABLE);
569 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
570 GDB_DATADIR_RELOCATABLE);
572 #ifdef WITH_PYTHON_PATH
574 /* For later use in helping Python find itself. */
575 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
577 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
583 add_substitute_path_rule (RELOC_SRCDIR,
584 make_relative_prefix (gdb_program_name, BINDIR,
588 /* There will always be an interpreter. Either the one passed into
589 this captured main, or one specified by the user at start up, or
590 the console. Initialize the interpreter to the one requested by
592 interpreter_p = xstrdup (context->interpreter_p);
594 /* Parse arguments and options. */
597 /* When var field is 0, use flag field to record the equivalent
598 short option (or arbitrary numbers starting at 10 for those
599 with no equivalent). */
611 static struct option long_options[] =
613 {"tui", no_argument, 0, OPT_TUI},
614 {"dbx", no_argument, &dbx_commands, 1},
615 {"readnow", no_argument, &readnow_symbol_files, 1},
616 {"r", no_argument, &readnow_symbol_files, 1},
617 {"quiet", no_argument, &quiet, 1},
618 {"q", no_argument, &quiet, 1},
619 {"silent", no_argument, &quiet, 1},
620 {"nh", no_argument, &inhibit_home_gdbinit, 1},
621 {"nx", no_argument, &inhibit_gdbinit, 1},
622 {"n", no_argument, &inhibit_gdbinit, 1},
623 {"batch-silent", no_argument, 0, 'B'},
624 {"batch", no_argument, &batch_flag, 1},
626 /* This is a synonym for "--annotate=1". --annotate is now
627 preferred, but keep this here for a long time because people
628 will be running emacses which use --fullname. */
629 {"fullname", no_argument, 0, 'f'},
630 {"f", no_argument, 0, 'f'},
632 {"annotate", required_argument, 0, OPT_ANNOTATE},
633 {"help", no_argument, &print_help, 1},
634 {"se", required_argument, 0, OPT_SE},
635 {"symbols", required_argument, 0, 's'},
636 {"s", required_argument, 0, 's'},
637 {"exec", required_argument, 0, 'e'},
638 {"e", required_argument, 0, 'e'},
639 {"core", required_argument, 0, 'c'},
640 {"c", required_argument, 0, 'c'},
641 {"pid", required_argument, 0, 'p'},
642 {"p", required_argument, 0, 'p'},
643 {"command", required_argument, 0, 'x'},
644 {"eval-command", required_argument, 0, 'X'},
645 {"version", no_argument, &print_version, 1},
646 {"configuration", no_argument, &print_configuration, 1},
647 {"x", required_argument, 0, 'x'},
648 {"ex", required_argument, 0, 'X'},
649 {"init-command", required_argument, 0, OPT_IX},
650 {"init-eval-command", required_argument, 0, OPT_IEX},
651 {"ix", required_argument, 0, OPT_IX},
652 {"iex", required_argument, 0, OPT_IEX},
654 {"tclcommand", required_argument, 0, 'z'},
655 {"enable-external-editor", no_argument, 0, 'y'},
656 {"editor-command", required_argument, 0, 'w'},
658 {"ui", required_argument, 0, 'i'},
659 {"interpreter", required_argument, 0, 'i'},
660 {"i", required_argument, 0, 'i'},
661 {"directory", required_argument, 0, 'd'},
662 {"d", required_argument, 0, 'd'},
663 {"data-directory", required_argument, 0, 'D'},
664 {"D", required_argument, 0, 'D'},
665 {"cd", required_argument, 0, OPT_CD},
666 {"tty", required_argument, 0, 't'},
667 {"baud", required_argument, 0, 'b'},
668 {"b", required_argument, 0, 'b'},
669 {"nw", no_argument, NULL, OPT_NOWINDOWS},
670 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
671 {"w", no_argument, NULL, OPT_WINDOWS},
672 {"windows", no_argument, NULL, OPT_WINDOWS},
673 {"statistics", no_argument, 0, OPT_STATISTICS},
674 {"write", no_argument, &write_files, 1},
675 {"args", no_argument, &set_args, 1},
676 {"l", required_argument, 0, 'l'},
677 {"return-child-result", no_argument, &return_child_result, 1},
678 {0, no_argument, 0, 0}
685 c = getopt_long_only (argc, argv, "",
686 long_options, &option_index);
687 if (c == EOF || set_args)
690 /* Long option that takes an argument. */
691 if (c == 0 && long_options[option_index].flag == 0)
692 c = long_options[option_index].val;
697 /* Long option that just sets a flag. */
707 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
708 annotation_level = atoi (optarg);
711 /* Enable the display of both time and space usage. */
712 set_per_command_time (1);
713 set_per_command_space (1);
716 /* --tui is equivalent to -i=tui. */
718 xfree (interpreter_p);
719 interpreter_p = xstrdup (INTERP_TUI);
721 error (_("%s: TUI mode is not supported"), gdb_program_name);
725 /* FIXME: cagney/2003-03-01: Not sure if this option is
726 actually useful, and if it is, what it should do. */
728 /* --windows is equivalent to -i=insight. */
729 xfree (interpreter_p);
730 interpreter_p = xstrdup (INTERP_INSIGHT);
734 /* -nw is equivalent to -i=console. */
735 xfree (interpreter_p);
736 interpreter_p = xstrdup (INTERP_CONSOLE);
739 annotation_level = 1;
755 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
757 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
762 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
764 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
769 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
771 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
776 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
778 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
782 batch_flag = batch_silent = 1;
783 gdb_stdout = ui_file_new();
786 if (optarg[0] == '\0')
787 error (_("%s: empty path for `--data-directory'"),
789 set_gdb_data_directory (optarg);
790 gdb_datadir_provided = 1;
795 extern int gdbtk_test (char *);
797 if (!gdbtk_test (optarg))
798 error (_("%s: unable to load tclcommand file \"%s\""),
799 gdb_program_name, optarg);
803 /* Backwards compatibility only. */
807 /* Set the external editor commands when gdb is farming out files
808 to be edited by another program. */
809 extern char *external_editor_command;
811 external_editor_command = xstrdup (optarg);
816 xfree (interpreter_p);
817 interpreter_p = xstrdup (optarg);
820 dirarg[ndir++] = optarg;
824 dirarg = (char **) xrealloc ((char *) dirarg,
825 dirsize * sizeof (*dirarg));
839 i = strtol (optarg, &p, 0);
840 if (i == 0 && p == optarg)
841 warning (_("could not set baud rate to `%s'."),
852 i = strtol (optarg, &p, 0);
853 if (i == 0 && p == optarg)
854 warning (_("could not set timeout limit to `%s'."),
862 error (_("Use `%s --help' for a complete list of options."),
871 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
872 setup_alternate_signal_stack ();
874 /* Initialize all files. */
875 gdb_init (gdb_program_name);
877 /* Now that gdb_init has created the initial inferior, we're in
878 position to set args for that inferior. */
881 /* The remaining options are the command-line options for the
882 inferior. The first one is the sym/exec file, and the rest
885 error (_("%s: `--args' specified but no program specified"),
888 symarg = argv[optind];
889 execarg = argv[optind];
891 set_inferior_args_vector (argc - optind, &argv[optind]);
895 /* OK, that's all the options. */
897 /* The first argument, if specified, is the name of the
901 symarg = argv[optind];
902 execarg = argv[optind];
906 /* If the user hasn't already specified a PID or the name of a
907 core file, then a second optional argument is allowed. If
908 present, this argument should be interpreted as either a
909 PID or a core file, whichever works. */
910 if (pidarg == NULL && corearg == NULL && optind < argc)
912 pid_or_core_arg = argv[optind];
916 /* Any argument left on the command line is unexpected and
917 will be ignored. Inform the user. */
919 fprintf_unfiltered (gdb_stderr,
920 _("Excess command line "
921 "arguments ignored. (%s%s)\n"),
923 (optind == argc - 1) ? "" : " ...");
926 /* Lookup gdbinit files. Note that the gdbinit file name may be
927 overriden during file initialization, so get_init_files should be
928 called after gdb_init. */
929 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
931 /* Do these (and anything which might call wrap_here or *_filtered)
932 after initialize_all_files() but before the interpreter has been
933 installed. Otherwize the help/version messages will be eaten by
934 the interpreter's output handler. */
938 print_gdb_version (gdb_stdout);
940 printf_filtered ("\n");
946 print_gdb_help (gdb_stdout);
947 fputs_unfiltered ("\n", gdb_stdout);
951 if (print_configuration)
953 print_gdb_configuration (gdb_stdout);
955 printf_filtered ("\n");
959 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
960 GDB retain the old MI1 interpreter startup behavior. Output the
961 copyright message before the interpreter is installed. That way
962 it isn't encapsulated in MI output. */
963 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
965 /* Print all the junk at the top, with trailing "..." if we are
966 about to read a symbol file (possibly slowly). */
967 print_gdb_version (gdb_stdout);
969 printf_filtered ("..");
971 printf_filtered ("\n");
972 gdb_flush (gdb_stdout); /* Force to screen during slow
976 /* Install the default UI. All the interpreters should have had a
977 look at things by now. Initialize the default interpreter. */
981 struct interp *interp = interp_lookup (current_ui, interpreter_p);
984 error (_("Interpreter `%s' unrecognized"), interpreter_p);
986 if (!interp_set (interp, 1))
987 error (_("Interpreter `%s' failed to initialize."), interpreter_p);
990 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
991 GDB retain the old MI1 interpreter startup behavior. Output the
992 copyright message after the interpreter is installed when it is
993 any sane interpreter. */
994 if (!quiet && !current_interp_named_p (INTERP_MI1))
996 /* Print all the junk at the top, with trailing "..." if we are
997 about to read a symbol file (possibly slowly). */
998 print_gdb_version (gdb_stdout);
1000 printf_filtered ("..");
1002 printf_filtered ("\n");
1003 gdb_flush (gdb_stdout); /* Force to screen during slow
1007 /* Set off error and warning messages with a blank line. */
1008 xfree (warning_pre_print);
1009 warning_pre_print = _("\nwarning: ");
1011 /* Read and execute the system-wide gdbinit file, if it exists.
1012 This is done *before* all the command line arguments are
1013 processed; it sets global parameters, which are independent of
1014 what file you are debugging or what directory you are in. */
1015 if (system_gdbinit && !inhibit_gdbinit)
1016 catch_command_errors_const (source_script, system_gdbinit, 0);
1018 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
1019 *before* all the command line arguments are processed; it sets
1020 global parameters, which are independent of what file you are
1021 debugging or what directory you are in. */
1023 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
1024 catch_command_errors_const (source_script, home_gdbinit, 0);
1026 /* Process '-ix' and '-iex' options early. */
1027 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1028 switch (cmdarg_p->type)
1030 case CMDARG_INIT_FILE:
1031 catch_command_errors_const (source_script, cmdarg_p->string,
1034 case CMDARG_INIT_COMMAND:
1035 catch_command_errors (execute_command, cmdarg_p->string,
1040 /* Now perform all the actions indicated by the arguments. */
1043 catch_command_errors (cd_command, cdarg, 0);
1046 for (i = 0; i < ndir; i++)
1047 catch_command_errors (directory_switch, dirarg[i], 0);
1050 /* Skip auto-loading section-specified scripts until we've sourced
1051 local_gdbinit (which is often used to augment the source search
1053 save_auto_load = global_auto_load;
1054 global_auto_load = 0;
1058 && strcmp (execarg, symarg) == 0)
1060 /* The exec file and the symbol-file are the same. If we can't
1061 open it, better only print one error message.
1062 catch_command_errors returns non-zero on success! */
1063 if (catch_command_errors_const (exec_file_attach, execarg,
1065 catch_command_errors_const (symbol_file_add_main, symarg,
1070 if (execarg != NULL)
1071 catch_command_errors_const (exec_file_attach, execarg,
1074 catch_command_errors_const (symbol_file_add_main, symarg,
1078 if (corearg && pidarg)
1079 error (_("Can't attach to process and specify "
1080 "a core file at the same time."));
1082 if (corearg != NULL)
1083 catch_command_errors (core_file_command, corearg, !batch_flag);
1084 else if (pidarg != NULL)
1085 catch_command_errors (attach_command, pidarg, !batch_flag);
1086 else if (pid_or_core_arg)
1088 /* The user specified 'gdb program pid' or gdb program core'.
1089 If pid_or_core_arg's first character is a digit, try attach
1090 first and then corefile. Otherwise try just corefile. */
1092 if (isdigit (pid_or_core_arg[0]))
1094 if (catch_command_errors (attach_command, pid_or_core_arg,
1096 catch_command_errors (core_file_command, pid_or_core_arg,
1099 else /* Can't be a pid, better be a corefile. */
1100 catch_command_errors (core_file_command, pid_or_core_arg,
1105 set_inferior_io_terminal (ttyarg);
1107 /* Error messages should no longer be distinguished with extra output. */
1108 warning_pre_print = _("warning: ");
1110 /* Read the .gdbinit file in the current directory, *if* it isn't
1111 the same as the $HOME/.gdbinit file (it should exist, also). */
1114 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1116 if (!inhibit_gdbinit && auto_load_local_gdbinit
1117 && file_is_auto_load_safe (local_gdbinit,
1118 _("auto-load: Loading .gdbinit "
1122 auto_load_local_gdbinit_loaded = 1;
1124 catch_command_errors_const (source_script, local_gdbinit, 0);
1128 /* Now that all .gdbinit's have been read and all -d options have been
1129 processed, we can read any scripts mentioned in SYMARG.
1130 We wait until now because it is common to add to the source search
1131 path in local_gdbinit. */
1132 global_auto_load = save_auto_load;
1133 ALL_OBJFILES (objfile)
1134 load_auto_scripts_for_objfile (objfile);
1136 /* Process '-x' and '-ex' options. */
1137 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1138 switch (cmdarg_p->type)
1141 catch_command_errors_const (source_script, cmdarg_p->string,
1144 case CMDARG_COMMAND:
1145 catch_command_errors (execute_command, cmdarg_p->string,
1150 /* Read in the old history after all the command files have been
1156 /* We have hit the end of the batch file. */
1157 quit_force (NULL, 0);
1160 /* Show time and/or space usage. */
1161 do_cleanups (pre_stat_chain);
1163 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1164 moving this loop and the code found in captured_command_loop()
1165 into the command_loop() proper. The main thing holding back that
1166 change - SET_TOP_LEVEL() - has been eliminated. */
1169 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1171 /* No exit -- exit is through quit_command. */
1175 gdb_main (struct captured_main_args *args)
1177 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1178 /* The only way to end up here is by an error (normal exit is
1179 handled by quit_force()), hence always return an error status. */
1184 /* Don't use *_filtered for printing help. We don't want to prompt
1185 for continue no matter how small the screen or how much we're going
1189 print_gdb_help (struct ui_file *stream)
1191 const char *system_gdbinit;
1192 const char *home_gdbinit;
1193 const char *local_gdbinit;
1195 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1197 /* Note: The options in the list below are only approximately sorted
1198 in the alphabetical order, so as to group closely related options
1200 fputs_unfiltered (_("\
1201 This is the GNU debugger. Usage:\n\n\
1202 gdb [options] [executable-file [core-file or process-id]]\n\
1203 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1205 fputs_unfiltered (_("\
1206 Selection of debuggee and its files:\n\n\
1207 --args Arguments after executable-file are passed to inferior\n\
1208 --core=COREFILE Analyze the core dump COREFILE.\n\
1209 --exec=EXECFILE Use EXECFILE as the executable.\n\
1210 --pid=PID Attach to running process PID.\n\
1211 --directory=DIR Search for source files in DIR.\n\
1212 --se=FILE Use FILE as symbol file and executable file.\n\
1213 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1214 --readnow Fully read symbol files on first access.\n\
1215 --write Set writing into executable and core files.\n\n\
1217 fputs_unfiltered (_("\
1218 Initial commands and command files:\n\n\
1219 --command=FILE, -x Execute GDB commands from FILE.\n\
1220 --init-command=FILE, -ix\n\
1221 Like -x but execute commands before loading inferior.\n\
1222 --eval-command=COMMAND, -ex\n\
1223 Execute a single GDB command.\n\
1224 May be used multiple times and in conjunction\n\
1226 --init-eval-command=COMMAND, -iex\n\
1227 Like -ex but before loading inferior.\n\
1228 --nh Do not read ~/.gdbinit.\n\
1229 --nx Do not read any .gdbinit files in any directory.\n\n\
1231 fputs_unfiltered (_("\
1232 Output and user interface control:\n\n\
1233 --fullname Output information used by emacs-GDB interface.\n\
1234 --interpreter=INTERP\n\
1235 Select a specific interpreter / user interface\n\
1236 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1237 -w Use the GUI interface.\n\
1238 --nw Do not use the GUI interface.\n\
1241 fputs_unfiltered (_("\
1242 --tui Use a terminal user interface.\n\
1245 fputs_unfiltered (_("\
1246 --dbx DBX compatibility mode.\n\
1247 -q, --quiet, --silent\n\
1248 Do not print version number on startup.\n\n\
1250 fputs_unfiltered (_("\
1251 Operating modes:\n\n\
1252 --batch Exit after processing options.\n\
1253 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1254 --return-child-result\n\
1255 GDB exit code will be the child's exit code.\n\
1256 --configuration Print details about GDB configuration and then exit.\n\
1257 --help Print this message and then exit.\n\
1258 --version Print version information and then exit.\n\n\
1259 Remote debugging options:\n\n\
1260 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1261 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1263 --cd=DIR Change current directory to DIR.\n\
1264 --data-directory=DIR, -D\n\
1265 Set GDB's data-directory to DIR.\n\
1267 fputs_unfiltered (_("\n\
1268 At startup, GDB reads the following init files and executes their commands:\n\
1271 fprintf_unfiltered (stream, _("\
1272 * system-wide init file: %s\n\
1273 "), system_gdbinit);
1275 fprintf_unfiltered (stream, _("\
1276 * user-specific init file: %s\n\
1279 fprintf_unfiltered (stream, _("\
1280 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1282 fputs_unfiltered (_("\n\
1283 For more information, type \"help\" from within GDB, or consult the\n\
1284 GDB manual (available as on-line info or a printed manual).\n\
1286 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1287 fprintf_unfiltered (stream, _("\
1288 Report bugs to \"%s\".\n\
1289 "), REPORT_BUGS_TO);