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 current_interp_command_loop ();
319 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
320 would clean things up (restoring the cleanup chain) to the state
321 they were just prior to the call. Technically, this means that
322 the do_cleanups() below is redundant. Unfortunately, many FUNCs
323 are not that well behaved. do_cleanups should either be replaced
324 with a do_cleanups call (to cover the problem) or an assertion
325 check to detect bad FUNCs code. */
326 do_cleanups (all_cleanups ());
327 /* If the command_loop returned, normally (rather than threw an
328 error) we try to quit. If the quit is aborted, catch_errors()
329 which called this catch the signal and restart the command
331 quit_command (NULL
, ui
->instream
== stdin
);
335 /* Handle command errors thrown from within
336 catch_command_errors/catch_command_errors_const. */
339 handle_command_errors (struct gdb_exception e
)
343 exception_print (gdb_stderr
, e
);
345 /* If any exception escaped to here, we better enable stdin.
346 Otherwise, any command that calls async_disable_stdin, and
347 then throws, will leave stdin inoperable. */
348 async_enable_stdin ();
354 /* Type of the command callback passed to catch_command_errors. */
356 typedef void (catch_command_errors_ftype
) (char *, int);
358 /* Wrap calls to commands run before the event loop is started. */
361 catch_command_errors (catch_command_errors_ftype
*command
,
362 char *arg
, int from_tty
)
366 int was_sync
= sync_execution
;
368 command (arg
, from_tty
);
370 maybe_wait_sync_command_done (was_sync
);
372 CATCH (e
, RETURN_MASK_ALL
)
374 return handle_command_errors (e
);
381 /* Type of the command callback passed to catch_command_errors_const. */
383 typedef void (catch_command_errors_const_ftype
) (const char *, int);
385 /* Like catch_command_errors, but works with const command and args. */
388 catch_command_errors_const (catch_command_errors_const_ftype
*command
,
389 const char *arg
, int from_tty
)
393 int was_sync
= sync_execution
;
395 command (arg
, from_tty
);
397 maybe_wait_sync_command_done (was_sync
);
399 CATCH (e
, RETURN_MASK_ALL
)
401 return handle_command_errors (e
);
408 /* Type of this option. */
411 /* Option type -x. */
414 /* Option type -ex. */
417 /* Option type -ix. */
420 /* Option type -iex. */
424 /* Arguments of --command option and its counterpart. */
425 typedef struct cmdarg
{
426 /* Type of this option. */
427 enum cmdarg_kind type
;
429 /* Value of this option - filename or the GDB command itself. String memory
430 is not owned by this structure despite it is 'const'. */
434 /* Define type VEC (cmdarg_s). */
435 DEF_VEC_O (cmdarg_s
);
438 captured_main (void *data
)
440 struct ui
*ui
= current_ui
;
441 struct captured_main_args
*context
= (struct captured_main_args
*) data
;
442 int argc
= context
->argc
;
443 char **argv
= context
->argv
;
444 static int quiet
= 0;
445 static int set_args
= 0;
446 static int inhibit_home_gdbinit
= 0;
448 /* Pointers to various arguments from command line. */
450 char *execarg
= NULL
;
452 char *corearg
= NULL
;
453 char *pid_or_core_arg
= NULL
;
457 /* These are static so that we can take their address in an
459 static int print_help
;
460 static int print_version
;
461 static int print_configuration
;
463 /* Pointers to all arguments of --command option. */
464 VEC (cmdarg_s
) *cmdarg_vec
= NULL
;
465 struct cmdarg
*cmdarg_p
;
467 /* Indices of all arguments of --directory option. */
469 /* Allocated size. */
471 /* Number of elements used. */
474 /* gdb init files. */
475 const char *system_gdbinit
;
476 const char *home_gdbinit
;
477 const char *local_gdbinit
;
481 struct objfile
*objfile
;
483 struct cleanup
*pre_stat_chain
;
486 /* Set this before calling make_command_stats_cleanup. */
487 lim_at_start
= (char *) sbrk (0);
490 pre_stat_chain
= make_command_stats_cleanup (0);
492 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
493 setlocale (LC_MESSAGES
, "");
495 #if defined (HAVE_SETLOCALE)
496 setlocale (LC_CTYPE
, "");
498 bindtextdomain (PACKAGE
, LOCALEDIR
);
499 textdomain (PACKAGE
);
504 make_cleanup (VEC_cleanup (cmdarg_s
), &cmdarg_vec
);
506 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
509 saved_command_line
= (char *) xstrdup ("");
511 ui
->instream
= stdin
;
512 ui
->outstream
= stdout
;
513 ui
->errstream
= stderr
;
515 ui
->input_fd
= fileno (stdin
);
518 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
519 as a Windows pipe, and Windows buffers on pipes. */
520 setvbuf (stderr
, NULL
, _IONBF
, BUFSIZ
);
523 gdb_stdout
= stdio_fileopen (stdout
);
524 gdb_stderr
= stderr_fileopen (stderr
);
526 gdb_stdlog
= gdb_stderr
; /* for moment */
527 gdb_stdtarg
= gdb_stderr
; /* for moment */
528 gdb_stdin
= stdio_fileopen (stdin
);
529 gdb_stdtargerr
= gdb_stderr
; /* for moment */
530 gdb_stdtargin
= gdb_stdin
; /* for moment */
533 /* On Windows, argv[0] is not necessarily set to absolute form when
534 GDB is found along PATH, without which relocation doesn't work. */
535 gdb_program_name
= windows_get_absolute_argv0 (argv
[0]);
537 gdb_program_name
= xstrdup (argv
[0]);
540 /* Prefix warning messages with the command name. */
541 warning_pre_print
= xstrprintf ("%s: warning: ", gdb_program_name
);
543 if (! getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
)))
544 perror_warning_with_name (_("error finding working directory"));
546 current_directory
= gdb_dirbuf
;
548 /* Set the sysroot path. */
549 gdb_sysroot
= relocate_gdb_directory (TARGET_SYSTEM_ROOT
,
550 TARGET_SYSTEM_ROOT_RELOCATABLE
);
552 if (gdb_sysroot
== NULL
|| *gdb_sysroot
== '\0')
555 gdb_sysroot
= xstrdup (TARGET_SYSROOT_PREFIX
);
558 debug_file_directory
= relocate_gdb_directory (DEBUGDIR
,
559 DEBUGDIR_RELOCATABLE
);
561 gdb_datadir
= relocate_gdb_directory (GDB_DATADIR
,
562 GDB_DATADIR_RELOCATABLE
);
564 #ifdef WITH_PYTHON_PATH
566 /* For later use in helping Python find itself. */
567 char *tmp
= concat (WITH_PYTHON_PATH
, SLASH_STRING
, "lib", (char *) NULL
);
569 python_libdir
= relocate_gdb_directory (tmp
, PYTHON_PATH_RELOCATABLE
);
575 add_substitute_path_rule (RELOC_SRCDIR
,
576 make_relative_prefix (gdb_program_name
, BINDIR
,
580 /* There will always be an interpreter. Either the one passed into
581 this captured main, or one specified by the user at start up, or
582 the console. Initialize the interpreter to the one requested by
584 interpreter_p
= xstrdup (context
->interpreter_p
);
586 /* Parse arguments and options. */
589 /* When var field is 0, use flag field to record the equivalent
590 short option (or arbitrary numbers starting at 10 for those
591 with no equivalent). */
603 static struct option long_options
[] =
605 {"tui", no_argument
, 0, OPT_TUI
},
606 {"dbx", no_argument
, &dbx_commands
, 1},
607 {"readnow", no_argument
, &readnow_symbol_files
, 1},
608 {"r", no_argument
, &readnow_symbol_files
, 1},
609 {"quiet", no_argument
, &quiet
, 1},
610 {"q", no_argument
, &quiet
, 1},
611 {"silent", no_argument
, &quiet
, 1},
612 {"nh", no_argument
, &inhibit_home_gdbinit
, 1},
613 {"nx", no_argument
, &inhibit_gdbinit
, 1},
614 {"n", no_argument
, &inhibit_gdbinit
, 1},
615 {"batch-silent", no_argument
, 0, 'B'},
616 {"batch", no_argument
, &batch_flag
, 1},
618 /* This is a synonym for "--annotate=1". --annotate is now
619 preferred, but keep this here for a long time because people
620 will be running emacses which use --fullname. */
621 {"fullname", no_argument
, 0, 'f'},
622 {"f", no_argument
, 0, 'f'},
624 {"annotate", required_argument
, 0, OPT_ANNOTATE
},
625 {"help", no_argument
, &print_help
, 1},
626 {"se", required_argument
, 0, OPT_SE
},
627 {"symbols", required_argument
, 0, 's'},
628 {"s", required_argument
, 0, 's'},
629 {"exec", required_argument
, 0, 'e'},
630 {"e", required_argument
, 0, 'e'},
631 {"core", required_argument
, 0, 'c'},
632 {"c", required_argument
, 0, 'c'},
633 {"pid", required_argument
, 0, 'p'},
634 {"p", required_argument
, 0, 'p'},
635 {"command", required_argument
, 0, 'x'},
636 {"eval-command", required_argument
, 0, 'X'},
637 {"version", no_argument
, &print_version
, 1},
638 {"configuration", no_argument
, &print_configuration
, 1},
639 {"x", required_argument
, 0, 'x'},
640 {"ex", required_argument
, 0, 'X'},
641 {"init-command", required_argument
, 0, OPT_IX
},
642 {"init-eval-command", required_argument
, 0, OPT_IEX
},
643 {"ix", required_argument
, 0, OPT_IX
},
644 {"iex", required_argument
, 0, OPT_IEX
},
646 {"tclcommand", required_argument
, 0, 'z'},
647 {"enable-external-editor", no_argument
, 0, 'y'},
648 {"editor-command", required_argument
, 0, 'w'},
650 {"ui", required_argument
, 0, 'i'},
651 {"interpreter", required_argument
, 0, 'i'},
652 {"i", required_argument
, 0, 'i'},
653 {"directory", required_argument
, 0, 'd'},
654 {"d", required_argument
, 0, 'd'},
655 {"data-directory", required_argument
, 0, 'D'},
656 {"D", required_argument
, 0, 'D'},
657 {"cd", required_argument
, 0, OPT_CD
},
658 {"tty", required_argument
, 0, 't'},
659 {"baud", required_argument
, 0, 'b'},
660 {"b", required_argument
, 0, 'b'},
661 {"nw", no_argument
, NULL
, OPT_NOWINDOWS
},
662 {"nowindows", no_argument
, NULL
, OPT_NOWINDOWS
},
663 {"w", no_argument
, NULL
, OPT_WINDOWS
},
664 {"windows", no_argument
, NULL
, OPT_WINDOWS
},
665 {"statistics", no_argument
, 0, OPT_STATISTICS
},
666 {"write", no_argument
, &write_files
, 1},
667 {"args", no_argument
, &set_args
, 1},
668 {"l", required_argument
, 0, 'l'},
669 {"return-child-result", no_argument
, &return_child_result
, 1},
670 {0, no_argument
, 0, 0}
677 c
= getopt_long_only (argc
, argv
, "",
678 long_options
, &option_index
);
679 if (c
== EOF
|| set_args
)
682 /* Long option that takes an argument. */
683 if (c
== 0 && long_options
[option_index
].flag
== 0)
684 c
= long_options
[option_index
].val
;
689 /* Long option that just sets a flag. */
699 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
700 annotation_level
= atoi (optarg
);
703 /* Enable the display of both time and space usage. */
704 set_per_command_time (1);
705 set_per_command_space (1);
708 /* --tui is equivalent to -i=tui. */
710 xfree (interpreter_p
);
711 interpreter_p
= xstrdup (INTERP_TUI
);
713 error (_("%s: TUI mode is not supported"), gdb_program_name
);
717 /* FIXME: cagney/2003-03-01: Not sure if this option is
718 actually useful, and if it is, what it should do. */
720 /* --windows is equivalent to -i=insight. */
721 xfree (interpreter_p
);
722 interpreter_p
= xstrdup (INTERP_INSIGHT
);
726 /* -nw is equivalent to -i=console. */
727 xfree (interpreter_p
);
728 interpreter_p
= xstrdup (INTERP_CONSOLE
);
731 annotation_level
= 1;
747 struct cmdarg cmdarg
= { CMDARG_FILE
, optarg
};
749 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
754 struct cmdarg cmdarg
= { CMDARG_COMMAND
, optarg
};
756 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
761 struct cmdarg cmdarg
= { CMDARG_INIT_FILE
, optarg
};
763 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
768 struct cmdarg cmdarg
= { CMDARG_INIT_COMMAND
, optarg
};
770 VEC_safe_push (cmdarg_s
, cmdarg_vec
, &cmdarg
);
774 batch_flag
= batch_silent
= 1;
775 gdb_stdout
= ui_file_new();
778 if (optarg
[0] == '\0')
779 error (_("%s: empty path for `--data-directory'"),
781 set_gdb_data_directory (optarg
);
782 gdb_datadir_provided
= 1;
787 extern int gdbtk_test (char *);
789 if (!gdbtk_test (optarg
))
790 error (_("%s: unable to load tclcommand file \"%s\""),
791 gdb_program_name
, optarg
);
795 /* Backwards compatibility only. */
799 /* Set the external editor commands when gdb is farming out files
800 to be edited by another program. */
801 extern char *external_editor_command
;
803 external_editor_command
= xstrdup (optarg
);
808 xfree (interpreter_p
);
809 interpreter_p
= xstrdup (optarg
);
812 dirarg
[ndir
++] = optarg
;
816 dirarg
= (char **) xrealloc ((char *) dirarg
,
817 dirsize
* sizeof (*dirarg
));
831 i
= strtol (optarg
, &p
, 0);
832 if (i
== 0 && p
== optarg
)
833 warning (_("could not set baud rate to `%s'."),
844 i
= strtol (optarg
, &p
, 0);
845 if (i
== 0 && p
== optarg
)
846 warning (_("could not set timeout limit to `%s'."),
854 error (_("Use `%s --help' for a complete list of options."),
863 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
864 setup_alternate_signal_stack ();
866 /* Initialize all files. */
867 gdb_init (gdb_program_name
);
869 /* Now that gdb_init has created the initial inferior, we're in
870 position to set args for that inferior. */
873 /* The remaining options are the command-line options for the
874 inferior. The first one is the sym/exec file, and the rest
877 error (_("%s: `--args' specified but no program specified"),
880 symarg
= argv
[optind
];
881 execarg
= argv
[optind
];
883 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
887 /* OK, that's all the options. */
889 /* The first argument, if specified, is the name of the
893 symarg
= argv
[optind
];
894 execarg
= argv
[optind
];
898 /* If the user hasn't already specified a PID or the name of a
899 core file, then a second optional argument is allowed. If
900 present, this argument should be interpreted as either a
901 PID or a core file, whichever works. */
902 if (pidarg
== NULL
&& corearg
== NULL
&& optind
< argc
)
904 pid_or_core_arg
= argv
[optind
];
908 /* Any argument left on the command line is unexpected and
909 will be ignored. Inform the user. */
911 fprintf_unfiltered (gdb_stderr
,
912 _("Excess command line "
913 "arguments ignored. (%s%s)\n"),
915 (optind
== argc
- 1) ? "" : " ...");
918 /* Lookup gdbinit files. Note that the gdbinit file name may be
919 overriden during file initialization, so get_init_files should be
920 called after gdb_init. */
921 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
923 /* Do these (and anything which might call wrap_here or *_filtered)
924 after initialize_all_files() but before the interpreter has been
925 installed. Otherwize the help/version messages will be eaten by
926 the interpreter's output handler. */
930 print_gdb_version (gdb_stdout
);
932 printf_filtered ("\n");
938 print_gdb_help (gdb_stdout
);
939 fputs_unfiltered ("\n", gdb_stdout
);
943 if (print_configuration
)
945 print_gdb_configuration (gdb_stdout
);
947 printf_filtered ("\n");
951 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
952 GDB retain the old MI1 interpreter startup behavior. Output the
953 copyright message before the interpreter is installed. That way
954 it isn't encapsulated in MI output. */
955 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
957 /* Print all the junk at the top, with trailing "..." if we are
958 about to read a symbol file (possibly slowly). */
959 print_gdb_version (gdb_stdout
);
961 printf_filtered ("..");
963 printf_filtered ("\n");
964 gdb_flush (gdb_stdout
); /* Force to screen during slow
968 /* Install the default UI. All the interpreters should have had a
969 look at things by now. Initialize the default interpreter. */
973 struct interp
*interp
= interp_lookup (current_ui
, interpreter_p
);
976 error (_("Interpreter `%s' unrecognized"), interpreter_p
);
978 if (!interp_set (interp
, 1))
979 error (_("Interpreter `%s' failed to initialize."), interpreter_p
);
982 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
983 GDB retain the old MI1 interpreter startup behavior. Output the
984 copyright message after the interpreter is installed when it is
985 any sane interpreter. */
986 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
988 /* Print all the junk at the top, with trailing "..." if we are
989 about to read a symbol file (possibly slowly). */
990 print_gdb_version (gdb_stdout
);
992 printf_filtered ("..");
994 printf_filtered ("\n");
995 gdb_flush (gdb_stdout
); /* Force to screen during slow
999 /* Set off error and warning messages with a blank line. */
1000 xfree (warning_pre_print
);
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
, 0);
1010 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
1011 *before* all the command line arguments are processed; it sets
1012 global parameters, which are independent of what file you are
1013 debugging or what directory you are in. */
1015 if (home_gdbinit
&& !inhibit_gdbinit
&& !inhibit_home_gdbinit
)
1016 catch_command_errors_const (source_script
, home_gdbinit
, 0);
1018 /* Process '-ix' and '-iex' options early. */
1019 for (i
= 0; VEC_iterate (cmdarg_s
, cmdarg_vec
, i
, cmdarg_p
); i
++)
1020 switch (cmdarg_p
->type
)
1022 case CMDARG_INIT_FILE
:
1023 catch_command_errors_const (source_script
, cmdarg_p
->string
,
1026 case CMDARG_INIT_COMMAND
:
1027 catch_command_errors (execute_command
, cmdarg_p
->string
,
1032 /* Now perform all the actions indicated by the arguments. */
1035 catch_command_errors (cd_command
, cdarg
, 0);
1038 for (i
= 0; i
< ndir
; i
++)
1039 catch_command_errors (directory_switch
, dirarg
[i
], 0);
1042 /* Skip auto-loading section-specified scripts until we've sourced
1043 local_gdbinit (which is often used to augment the source search
1045 save_auto_load
= global_auto_load
;
1046 global_auto_load
= 0;
1050 && strcmp (execarg
, symarg
) == 0)
1052 /* The exec file and the symbol-file are the same. If we can't
1053 open it, better only print one error message.
1054 catch_command_errors returns non-zero on success! */
1055 if (catch_command_errors_const (exec_file_attach
, execarg
,
1057 catch_command_errors_const (symbol_file_add_main
, symarg
,
1062 if (execarg
!= NULL
)
1063 catch_command_errors_const (exec_file_attach
, execarg
,
1066 catch_command_errors_const (symbol_file_add_main
, symarg
,
1070 if (corearg
&& pidarg
)
1071 error (_("Can't attach to process and specify "
1072 "a core file at the same time."));
1074 if (corearg
!= NULL
)
1075 catch_command_errors (core_file_command
, corearg
, !batch_flag
);
1076 else if (pidarg
!= NULL
)
1077 catch_command_errors (attach_command
, pidarg
, !batch_flag
);
1078 else if (pid_or_core_arg
)
1080 /* The user specified 'gdb program pid' or gdb program core'.
1081 If pid_or_core_arg's first character is a digit, try attach
1082 first and then corefile. Otherwise try just corefile. */
1084 if (isdigit (pid_or_core_arg
[0]))
1086 if (catch_command_errors (attach_command
, pid_or_core_arg
,
1088 catch_command_errors (core_file_command
, pid_or_core_arg
,
1091 else /* Can't be a pid, better be a corefile. */
1092 catch_command_errors (core_file_command
, pid_or_core_arg
,
1097 set_inferior_io_terminal (ttyarg
);
1099 /* Error messages should no longer be distinguished with extra output. */
1100 warning_pre_print
= _("warning: ");
1102 /* Read the .gdbinit file in the current directory, *if* it isn't
1103 the same as the $HOME/.gdbinit file (it should exist, also). */
1106 auto_load_local_gdbinit_pathname
= gdb_realpath (local_gdbinit
);
1108 if (!inhibit_gdbinit
&& auto_load_local_gdbinit
1109 && file_is_auto_load_safe (local_gdbinit
,
1110 _("auto-load: Loading .gdbinit "
1114 auto_load_local_gdbinit_loaded
= 1;
1116 catch_command_errors_const (source_script
, local_gdbinit
, 0);
1120 /* Now that all .gdbinit's have been read and all -d options have been
1121 processed, we can read any scripts mentioned in SYMARG.
1122 We wait until now because it is common to add to the source search
1123 path in local_gdbinit. */
1124 global_auto_load
= save_auto_load
;
1125 ALL_OBJFILES (objfile
)
1126 load_auto_scripts_for_objfile (objfile
);
1128 /* Process '-x' and '-ex' options. */
1129 for (i
= 0; VEC_iterate (cmdarg_s
, cmdarg_vec
, i
, cmdarg_p
); i
++)
1130 switch (cmdarg_p
->type
)
1133 catch_command_errors_const (source_script
, cmdarg_p
->string
,
1136 case CMDARG_COMMAND
:
1137 catch_command_errors (execute_command
, cmdarg_p
->string
,
1142 /* Read in the old history after all the command files have been
1148 /* We have hit the end of the batch file. */
1149 quit_force (NULL
, 0);
1152 /* Show time and/or space usage. */
1153 do_cleanups (pre_stat_chain
);
1155 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1156 moving this loop and the code found in captured_command_loop()
1157 into the command_loop() proper. The main thing holding back that
1158 change - SET_TOP_LEVEL() - has been eliminated. */
1161 catch_errors (captured_command_loop
, 0, "", RETURN_MASK_ALL
);
1163 /* No exit -- exit is through quit_command. */
1167 gdb_main (struct captured_main_args
*args
)
1169 catch_errors (captured_main
, args
, "", RETURN_MASK_ALL
);
1170 /* The only way to end up here is by an error (normal exit is
1171 handled by quit_force()), hence always return an error status. */
1176 /* Don't use *_filtered for printing help. We don't want to prompt
1177 for continue no matter how small the screen or how much we're going
1181 print_gdb_help (struct ui_file
*stream
)
1183 const char *system_gdbinit
;
1184 const char *home_gdbinit
;
1185 const char *local_gdbinit
;
1187 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
1189 /* Note: The options in the list below are only approximately sorted
1190 in the alphabetical order, so as to group closely related options
1192 fputs_unfiltered (_("\
1193 This is the GNU debugger. Usage:\n\n\
1194 gdb [options] [executable-file [core-file or process-id]]\n\
1195 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1197 fputs_unfiltered (_("\
1198 Selection of debuggee and its files:\n\n\
1199 --args Arguments after executable-file are passed to inferior\n\
1200 --core=COREFILE Analyze the core dump COREFILE.\n\
1201 --exec=EXECFILE Use EXECFILE as the executable.\n\
1202 --pid=PID Attach to running process PID.\n\
1203 --directory=DIR Search for source files in DIR.\n\
1204 --se=FILE Use FILE as symbol file and executable file.\n\
1205 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1206 --readnow Fully read symbol files on first access.\n\
1207 --write Set writing into executable and core files.\n\n\
1209 fputs_unfiltered (_("\
1210 Initial commands and command files:\n\n\
1211 --command=FILE, -x Execute GDB commands from FILE.\n\
1212 --init-command=FILE, -ix\n\
1213 Like -x but execute commands before loading inferior.\n\
1214 --eval-command=COMMAND, -ex\n\
1215 Execute a single GDB command.\n\
1216 May be used multiple times and in conjunction\n\
1218 --init-eval-command=COMMAND, -iex\n\
1219 Like -ex but before loading inferior.\n\
1220 --nh Do not read ~/.gdbinit.\n\
1221 --nx Do not read any .gdbinit files in any directory.\n\n\
1223 fputs_unfiltered (_("\
1224 Output and user interface control:\n\n\
1225 --fullname Output information used by emacs-GDB interface.\n\
1226 --interpreter=INTERP\n\
1227 Select a specific interpreter / user interface\n\
1228 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1229 -w Use the GUI interface.\n\
1230 --nw Do not use the GUI interface.\n\
1233 fputs_unfiltered (_("\
1234 --tui Use a terminal user interface.\n\
1237 fputs_unfiltered (_("\
1238 --dbx DBX compatibility mode.\n\
1239 -q, --quiet, --silent\n\
1240 Do not print version number on startup.\n\n\
1242 fputs_unfiltered (_("\
1243 Operating modes:\n\n\
1244 --batch Exit after processing options.\n\
1245 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1246 --return-child-result\n\
1247 GDB exit code will be the child's exit code.\n\
1248 --configuration Print details about GDB configuration and then exit.\n\
1249 --help Print this message and then exit.\n\
1250 --version Print version information and then exit.\n\n\
1251 Remote debugging options:\n\n\
1252 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1253 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1255 --cd=DIR Change current directory to DIR.\n\
1256 --data-directory=DIR, -D\n\
1257 Set GDB's data-directory to DIR.\n\
1259 fputs_unfiltered (_("\n\
1260 At startup, GDB reads the following init files and executes their commands:\n\
1263 fprintf_unfiltered (stream
, _("\
1264 * system-wide init file: %s\n\
1265 "), system_gdbinit
);
1267 fprintf_unfiltered (stream
, _("\
1268 * user-specific init file: %s\n\
1271 fprintf_unfiltered (stream
, _("\
1272 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1274 fputs_unfiltered (_("\n\
1275 For more information, type \"help\" from within GDB, or consult the\n\
1276 GDB manual (available as on-line info or a printed manual).\n\
1278 if (REPORT_BUGS_TO
[0] && stream
== gdb_stdout
)
1279 fprintf_unfiltered (stream
, _("\
1280 Report bugs to \"%s\".\n\
1281 "), REPORT_BUGS_TO
);