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. */
319 interp_pre_command_loop (top_level_interpreter ());
321 /* Now it's time to start the event 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
, ui
->instream
== stdin
);
340 /* Handle command errors thrown from within
341 catch_command_errors/catch_command_errors_const. */
344 handle_command_errors (struct gdb_exception e
)
348 exception_print (gdb_stderr
, e
);
350 /* If any exception escaped to here, we better enable stdin.
351 Otherwise, any command that calls async_disable_stdin, and
352 then throws, will leave stdin inoperable. */
353 async_enable_stdin ();
359 /* Type of the command callback passed to catch_command_errors. */
361 typedef void (catch_command_errors_ftype
) (char *, int);
363 /* Wrap calls to commands run before the event loop is started. */
366 catch_command_errors (catch_command_errors_ftype
*command
,
367 char *arg
, int from_tty
)
371 int was_sync
= sync_execution
;
373 command (arg
, from_tty
);
375 maybe_wait_sync_command_done (was_sync
);
377 CATCH (e
, RETURN_MASK_ALL
)
379 return handle_command_errors (e
);
386 /* Type of the command callback passed to catch_command_errors_const. */
388 typedef void (catch_command_errors_const_ftype
) (const char *, int);
390 /* Like catch_command_errors, but works with const command and args. */
393 catch_command_errors_const (catch_command_errors_const_ftype
*command
,
394 const char *arg
, int from_tty
)
398 int was_sync
= sync_execution
;
400 command (arg
, from_tty
);
402 maybe_wait_sync_command_done (was_sync
);
404 CATCH (e
, RETURN_MASK_ALL
)
406 return handle_command_errors (e
);
413 /* Type of this option. */
416 /* Option type -x. */
419 /* Option type -ex. */
422 /* Option type -ix. */
425 /* Option type -iex. */
429 /* Arguments of --command option and its counterpart. */
430 typedef struct cmdarg
{
431 /* Type of this option. */
432 enum cmdarg_kind type
;
434 /* Value of this option - filename or the GDB command itself. String memory
435 is not owned by this structure despite it is 'const'. */
439 /* Define type VEC (cmdarg_s). */
440 DEF_VEC_O (cmdarg_s
);
443 captured_main (void *data
)
445 struct ui
*ui
= current_ui
;
446 struct captured_main_args
*context
= (struct captured_main_args
*) data
;
447 int argc
= context
->argc
;
448 char **argv
= context
->argv
;
449 static int quiet
= 0;
450 static int set_args
= 0;
451 static int inhibit_home_gdbinit
= 0;
453 /* Pointers to various arguments from command line. */
455 char *execarg
= NULL
;
457 char *corearg
= NULL
;
458 char *pid_or_core_arg
= NULL
;
462 /* These are static so that we can take their address in an
464 static int print_help
;
465 static int print_version
;
466 static int print_configuration
;
468 /* Pointers to all arguments of --command option. */
469 VEC (cmdarg_s
) *cmdarg_vec
= NULL
;
470 struct cmdarg
*cmdarg_p
;
472 /* Indices of all arguments of --directory option. */
474 /* Allocated size. */
476 /* Number of elements used. */
479 /* gdb init files. */
480 const char *system_gdbinit
;
481 const char *home_gdbinit
;
482 const char *local_gdbinit
;
486 struct objfile
*objfile
;
488 struct cleanup
*pre_stat_chain
;
491 /* Set this before calling make_command_stats_cleanup. */
492 lim_at_start
= (char *) sbrk (0);
495 pre_stat_chain
= make_command_stats_cleanup (0);
497 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
498 setlocale (LC_MESSAGES
, "");
500 #if defined (HAVE_SETLOCALE)
501 setlocale (LC_CTYPE
, "");
503 bindtextdomain (PACKAGE
, LOCALEDIR
);
504 textdomain (PACKAGE
);
509 make_cleanup (VEC_cleanup (cmdarg_s
), &cmdarg_vec
);
511 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
514 saved_command_line
= (char *) xstrdup ("");
516 ui
->instream
= stdin
;
517 ui
->outstream
= stdout
;
518 ui
->errstream
= stderr
;
520 ui
->input_fd
= fileno (stdin
);
523 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
524 as a Windows pipe, and Windows buffers on pipes. */
525 setvbuf (stderr
, NULL
, _IONBF
, BUFSIZ
);
528 gdb_stdout
= stdio_fileopen (stdout
);
529 gdb_stderr
= stderr_fileopen (stderr
);
531 gdb_stdlog
= gdb_stderr
; /* for moment */
532 gdb_stdtarg
= gdb_stderr
; /* for moment */
533 gdb_stdin
= stdio_fileopen (stdin
);
534 gdb_stdtargerr
= gdb_stderr
; /* for moment */
535 gdb_stdtargin
= gdb_stdin
; /* for moment */
538 /* On Windows, argv[0] is not necessarily set to absolute form when
539 GDB is found along PATH, without which relocation doesn't work. */
540 gdb_program_name
= windows_get_absolute_argv0 (argv
[0]);
542 gdb_program_name
= xstrdup (argv
[0]);
545 /* Prefix warning messages with the command name. */
546 warning_pre_print
= xstrprintf ("%s: warning: ", gdb_program_name
);
548 if (! getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
)))
549 perror_warning_with_name (_("error finding working directory"));
551 current_directory
= gdb_dirbuf
;
553 /* Set the sysroot path. */
554 gdb_sysroot
= relocate_gdb_directory (TARGET_SYSTEM_ROOT
,
555 TARGET_SYSTEM_ROOT_RELOCATABLE
);
557 if (gdb_sysroot
== NULL
|| *gdb_sysroot
== '\0')
560 gdb_sysroot
= xstrdup (TARGET_SYSROOT_PREFIX
);
563 debug_file_directory
= relocate_gdb_directory (DEBUGDIR
,
564 DEBUGDIR_RELOCATABLE
);
566 gdb_datadir
= relocate_gdb_directory (GDB_DATADIR
,
567 GDB_DATADIR_RELOCATABLE
);
569 #ifdef WITH_PYTHON_PATH
571 /* For later use in helping Python find itself. */
572 char *tmp
= concat (WITH_PYTHON_PATH
, SLASH_STRING
, "lib", (char *) NULL
);
574 python_libdir
= relocate_gdb_directory (tmp
, PYTHON_PATH_RELOCATABLE
);
580 add_substitute_path_rule (RELOC_SRCDIR
,
581 make_relative_prefix (gdb_program_name
, BINDIR
,
585 /* There will always be an interpreter. Either the one passed into
586 this captured main, or one specified by the user at start up, or
587 the console. Initialize the interpreter to the one requested by
589 interpreter_p
= xstrdup (context
->interpreter_p
);
591 /* Parse arguments and options. */
594 /* When var field is 0, use flag field to record the equivalent
595 short option (or arbitrary numbers starting at 10 for those
596 with no equivalent). */
608 static struct option long_options
[] =
610 {"tui", no_argument
, 0, OPT_TUI
},
611 {"dbx", no_argument
, &dbx_commands
, 1},
612 {"readnow", no_argument
, &readnow_symbol_files
, 1},
613 {"r", no_argument
, &readnow_symbol_files
, 1},
614 {"quiet", no_argument
, &quiet
, 1},
615 {"q", no_argument
, &quiet
, 1},
616 {"silent", no_argument
, &quiet
, 1},
617 {"nh", no_argument
, &inhibit_home_gdbinit
, 1},
618 {"nx", no_argument
, &inhibit_gdbinit
, 1},
619 {"n", no_argument
, &inhibit_gdbinit
, 1},
620 {"batch-silent", no_argument
, 0, 'B'},
621 {"batch", no_argument
, &batch_flag
, 1},
623 /* This is a synonym for "--annotate=1". --annotate is now
624 preferred, but keep this here for a long time because people
625 will be running emacses which use --fullname. */
626 {"fullname", no_argument
, 0, 'f'},
627 {"f", no_argument
, 0, 'f'},
629 {"annotate", required_argument
, 0, OPT_ANNOTATE
},
630 {"help", no_argument
, &print_help
, 1},
631 {"se", required_argument
, 0, OPT_SE
},
632 {"symbols", required_argument
, 0, 's'},
633 {"s", required_argument
, 0, 's'},
634 {"exec", required_argument
, 0, 'e'},
635 {"e", required_argument
, 0, 'e'},
636 {"core", required_argument
, 0, 'c'},
637 {"c", required_argument
, 0, 'c'},
638 {"pid", required_argument
, 0, 'p'},
639 {"p", required_argument
, 0, 'p'},
640 {"command", required_argument
, 0, 'x'},
641 {"eval-command", required_argument
, 0, 'X'},
642 {"version", no_argument
, &print_version
, 1},
643 {"configuration", no_argument
, &print_configuration
, 1},
644 {"x", required_argument
, 0, 'x'},
645 {"ex", required_argument
, 0, 'X'},
646 {"init-command", required_argument
, 0, OPT_IX
},
647 {"init-eval-command", required_argument
, 0, OPT_IEX
},
648 {"ix", required_argument
, 0, OPT_IX
},
649 {"iex", required_argument
, 0, OPT_IEX
},
651 {"tclcommand", required_argument
, 0, 'z'},
652 {"enable-external-editor", no_argument
, 0, 'y'},
653 {"editor-command", required_argument
, 0, 'w'},
655 {"ui", required_argument
, 0, 'i'},
656 {"interpreter", required_argument
, 0, 'i'},
657 {"i", required_argument
, 0, 'i'},
658 {"directory", required_argument
, 0, 'd'},
659 {"d", required_argument
, 0, 'd'},
660 {"data-directory", required_argument
, 0, 'D'},
661 {"D", required_argument
, 0, 'D'},
662 {"cd", required_argument
, 0, OPT_CD
},
663 {"tty", required_argument
, 0, 't'},
664 {"baud", required_argument
, 0, 'b'},
665 {"b", required_argument
, 0, 'b'},
666 {"nw", no_argument
, NULL
, OPT_NOWINDOWS
},
667 {"nowindows", no_argument
, NULL
, OPT_NOWINDOWS
},
668 {"w", no_argument
, NULL
, OPT_WINDOWS
},
669 {"windows", no_argument
, NULL
, OPT_WINDOWS
},
670 {"statistics", no_argument
, 0, OPT_STATISTICS
},
671 {"write", no_argument
, &write_files
, 1},
672 {"args", no_argument
, &set_args
, 1},
673 {"l", required_argument
, 0, 'l'},
674 {"return-child-result", no_argument
, &return_child_result
, 1},
675 {0, no_argument
, 0, 0}
682 c
= getopt_long_only (argc
, argv
, "",
683 long_options
, &option_index
);
684 if (c
== EOF
|| set_args
)
687 /* Long option that takes an argument. */
688 if (c
== 0 && long_options
[option_index
].flag
== 0)
689 c
= long_options
[option_index
].val
;
694 /* Long option that just sets a flag. */
704 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
705 annotation_level
= atoi (optarg
);
708 /* Enable the display of both time and space usage. */
709 set_per_command_time (1);
710 set_per_command_space (1);
713 /* --tui is equivalent to -i=tui. */
715 xfree (interpreter_p
);
716 interpreter_p
= xstrdup (INTERP_TUI
);
718 error (_("%s: TUI mode is not supported"), gdb_program_name
);
722 /* FIXME: cagney/2003-03-01: Not sure if this option is
723 actually useful, and if it is, what it should do. */
725 /* --windows is equivalent to -i=insight. */
726 xfree (interpreter_p
);
727 interpreter_p
= xstrdup (INTERP_INSIGHT
);
731 /* -nw is equivalent to -i=console. */
732 xfree (interpreter_p
);
733 interpreter_p
= xstrdup (INTERP_CONSOLE
);
736 annotation_level
= 1;
752 struct cmdarg cmdarg
= { CMDARG_FILE
, optarg
};
754 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
759 struct cmdarg cmdarg
= { CMDARG_COMMAND
, optarg
};
761 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
766 struct cmdarg cmdarg
= { CMDARG_INIT_FILE
, optarg
};
768 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
773 struct cmdarg cmdarg
= { CMDARG_INIT_COMMAND
, optarg
};
775 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
779 batch_flag
= batch_silent
= 1;
780 gdb_stdout
= ui_file_new();
783 if (optarg
[0] == '\0')
784 error (_("%s: empty path for `--data-directory'"),
786 set_gdb_data_directory (optarg
);
787 gdb_datadir_provided
= 1;
792 extern int gdbtk_test (char *);
794 if (!gdbtk_test (optarg
))
795 error (_("%s: unable to load tclcommand file \"%s\""),
796 gdb_program_name
, optarg
);
800 /* Backwards compatibility only. */
804 /* Set the external editor commands when gdb is farming out files
805 to be edited by another program. */
806 extern char *external_editor_command
;
808 external_editor_command
= xstrdup (optarg
);
813 xfree (interpreter_p
);
814 interpreter_p
= xstrdup (optarg
);
817 dirarg
[ndir
++] = optarg
;
821 dirarg
= (char **) xrealloc ((char *) dirarg
,
822 dirsize
* sizeof (*dirarg
));
836 i
= strtol (optarg
, &p
, 0);
837 if (i
== 0 && p
== optarg
)
838 warning (_("could not set baud rate to `%s'."),
849 i
= strtol (optarg
, &p
, 0);
850 if (i
== 0 && p
== optarg
)
851 warning (_("could not set timeout limit to `%s'."),
859 error (_("Use `%s --help' for a complete list of options."),
868 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
869 setup_alternate_signal_stack ();
871 /* Initialize all files. */
872 gdb_init (gdb_program_name
);
874 /* Now that gdb_init has created the initial inferior, we're in
875 position to set args for that inferior. */
878 /* The remaining options are the command-line options for the
879 inferior. The first one is the sym/exec file, and the rest
882 error (_("%s: `--args' specified but no program specified"),
885 symarg
= argv
[optind
];
886 execarg
= argv
[optind
];
888 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
892 /* OK, that's all the options. */
894 /* The first argument, if specified, is the name of the
898 symarg
= argv
[optind
];
899 execarg
= argv
[optind
];
903 /* If the user hasn't already specified a PID or the name of a
904 core file, then a second optional argument is allowed. If
905 present, this argument should be interpreted as either a
906 PID or a core file, whichever works. */
907 if (pidarg
== NULL
&& corearg
== NULL
&& optind
< argc
)
909 pid_or_core_arg
= argv
[optind
];
913 /* Any argument left on the command line is unexpected and
914 will be ignored. Inform the user. */
916 fprintf_unfiltered (gdb_stderr
,
917 _("Excess command line "
918 "arguments ignored. (%s%s)\n"),
920 (optind
== argc
- 1) ? "" : " ...");
923 /* Lookup gdbinit files. Note that the gdbinit file name may be
924 overriden during file initialization, so get_init_files should be
925 called after gdb_init. */
926 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
928 /* Do these (and anything which might call wrap_here or *_filtered)
929 after initialize_all_files() but before the interpreter has been
930 installed. Otherwize the help/version messages will be eaten by
931 the interpreter's output handler. */
935 print_gdb_version (gdb_stdout
);
937 printf_filtered ("\n");
943 print_gdb_help (gdb_stdout
);
944 fputs_unfiltered ("\n", gdb_stdout
);
948 if (print_configuration
)
950 print_gdb_configuration (gdb_stdout
);
952 printf_filtered ("\n");
956 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
957 GDB retain the old MI1 interpreter startup behavior. Output the
958 copyright message before the interpreter is installed. That way
959 it isn't encapsulated in MI output. */
960 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
962 /* Print all the junk at the top, with trailing "..." if we are
963 about to read a symbol file (possibly slowly). */
964 print_gdb_version (gdb_stdout
);
966 printf_filtered ("..");
968 printf_filtered ("\n");
969 gdb_flush (gdb_stdout
); /* Force to screen during slow
973 /* Install the default UI. All the interpreters should have had a
974 look at things by now. Initialize the default interpreter. */
978 struct interp
*interp
= interp_lookup (current_ui
, interpreter_p
);
981 error (_("Interpreter `%s' unrecognized"), interpreter_p
);
983 if (!interp_set (interp
, 1))
984 error (_("Interpreter `%s' failed to initialize."), interpreter_p
);
987 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
988 GDB retain the old MI1 interpreter startup behavior. Output the
989 copyright message after the interpreter is installed when it is
990 any sane interpreter. */
991 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
993 /* Print all the junk at the top, with trailing "..." if we are
994 about to read a symbol file (possibly slowly). */
995 print_gdb_version (gdb_stdout
);
997 printf_filtered ("..");
999 printf_filtered ("\n");
1000 gdb_flush (gdb_stdout
); /* Force to screen during slow
1004 /* Set off error and warning messages with a blank line. */
1005 xfree (warning_pre_print
);
1006 warning_pre_print
= _("\nwarning: ");
1008 /* Read and execute the system-wide gdbinit file, if it exists.
1009 This is done *before* all the command line arguments are
1010 processed; it sets global parameters, which are independent of
1011 what file you are debugging or what directory you are in. */
1012 if (system_gdbinit
&& !inhibit_gdbinit
)
1013 catch_command_errors_const (source_script
, system_gdbinit
, 0);
1015 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
1016 *before* all the command line arguments are processed; it sets
1017 global parameters, which are independent of what file you are
1018 debugging or what directory you are in. */
1020 if (home_gdbinit
&& !inhibit_gdbinit
&& !inhibit_home_gdbinit
)
1021 catch_command_errors_const (source_script
, home_gdbinit
, 0);
1023 /* Process '-ix' and '-iex' options early. */
1024 for (i
= 0; VEC_iterate (cmdarg_s
, cmdarg_vec
, i
, cmdarg_p
); i
++)
1025 switch (cmdarg_p
->type
)
1027 case CMDARG_INIT_FILE
:
1028 catch_command_errors_const (source_script
, cmdarg_p
->string
,
1031 case CMDARG_INIT_COMMAND
:
1032 catch_command_errors (execute_command
, cmdarg_p
->string
,
1037 /* Now perform all the actions indicated by the arguments. */
1040 catch_command_errors (cd_command
, cdarg
, 0);
1043 for (i
= 0; i
< ndir
; i
++)
1044 catch_command_errors (directory_switch
, dirarg
[i
], 0);
1047 /* Skip auto-loading section-specified scripts until we've sourced
1048 local_gdbinit (which is often used to augment the source search
1050 save_auto_load
= global_auto_load
;
1051 global_auto_load
= 0;
1055 && strcmp (execarg
, symarg
) == 0)
1057 /* The exec file and the symbol-file are the same. If we can't
1058 open it, better only print one error message.
1059 catch_command_errors returns non-zero on success! */
1060 if (catch_command_errors_const (exec_file_attach
, execarg
,
1062 catch_command_errors_const (symbol_file_add_main
, symarg
,
1067 if (execarg
!= NULL
)
1068 catch_command_errors_const (exec_file_attach
, execarg
,
1071 catch_command_errors_const (symbol_file_add_main
, symarg
,
1075 if (corearg
&& pidarg
)
1076 error (_("Can't attach to process and specify "
1077 "a core file at the same time."));
1079 if (corearg
!= NULL
)
1080 catch_command_errors (core_file_command
, corearg
, !batch_flag
);
1081 else if (pidarg
!= NULL
)
1082 catch_command_errors (attach_command
, pidarg
, !batch_flag
);
1083 else if (pid_or_core_arg
)
1085 /* The user specified 'gdb program pid' or gdb program core'.
1086 If pid_or_core_arg's first character is a digit, try attach
1087 first and then corefile. Otherwise try just corefile. */
1089 if (isdigit (pid_or_core_arg
[0]))
1091 if (catch_command_errors (attach_command
, pid_or_core_arg
,
1093 catch_command_errors (core_file_command
, pid_or_core_arg
,
1096 else /* Can't be a pid, better be a corefile. */
1097 catch_command_errors (core_file_command
, pid_or_core_arg
,
1102 set_inferior_io_terminal (ttyarg
);
1104 /* Error messages should no longer be distinguished with extra output. */
1105 warning_pre_print
= _("warning: ");
1107 /* Read the .gdbinit file in the current directory, *if* it isn't
1108 the same as the $HOME/.gdbinit file (it should exist, also). */
1111 auto_load_local_gdbinit_pathname
= gdb_realpath (local_gdbinit
);
1113 if (!inhibit_gdbinit
&& auto_load_local_gdbinit
1114 && file_is_auto_load_safe (local_gdbinit
,
1115 _("auto-load: Loading .gdbinit "
1119 auto_load_local_gdbinit_loaded
= 1;
1121 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
,
1141 case CMDARG_COMMAND
:
1142 catch_command_errors (execute_command
, cmdarg_p
->string
,
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 -q, --quiet, --silent\n\
1245 Do not print version number on startup.\n\n\
1247 fputs_unfiltered (_("\
1248 Operating modes:\n\n\
1249 --batch Exit after processing options.\n\
1250 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1251 --return-child-result\n\
1252 GDB exit code will be the child's exit code.\n\
1253 --configuration Print details about GDB configuration and then exit.\n\
1254 --help Print this message and then exit.\n\
1255 --version Print version information and then exit.\n\n\
1256 Remote debugging options:\n\n\
1257 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1258 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1260 --cd=DIR Change current directory to DIR.\n\
1261 --data-directory=DIR, -D\n\
1262 Set GDB's data-directory to DIR.\n\
1264 fputs_unfiltered (_("\n\
1265 At startup, GDB reads the following init files and executes their commands:\n\
1268 fprintf_unfiltered (stream
, _("\
1269 * system-wide init file: %s\n\
1270 "), system_gdbinit
);
1272 fprintf_unfiltered (stream
, _("\
1273 * user-specific init file: %s\n\
1276 fprintf_unfiltered (stream
, _("\
1277 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1279 fputs_unfiltered (_("\n\
1280 For more information, type \"help\" from within GDB, or consult the\n\
1281 GDB manual (available as on-line info or a printed manual).\n\
1283 if (REPORT_BUGS_TO
[0] && stream
== gdb_stdout
)
1284 fprintf_unfiltered (stream
, _("\
1285 Report bugs to \"%s\".\n\
1286 "), REPORT_BUGS_TO
);