1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 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"
47 #include "signals-state-save-restore.h"
50 /* The selected interpreter. This will be used as a set command
51 variable, so it should always be malloc'ed - since
52 do_setshow_command will free it. */
55 /* Whether dbx commands will be handled. */
58 /* System root path, used to find libraries etc. */
59 char *gdb_sysroot
= 0;
61 /* GDB datadir, used to store data files. */
62 char *gdb_datadir
= 0;
64 /* Non-zero if GDB_DATADIR was provided on the command line.
65 This doesn't track whether data-directory is set later from the
66 command line, but we don't reread system.gdbinit when that happens. */
67 static int gdb_datadir_provided
= 0;
69 /* If gdb was configured with --with-python=/path,
70 the possibly relocated path to python's lib directory. */
71 char *python_libdir
= 0;
73 /* Target IO streams. */
74 struct ui_file
*gdb_stdtargin
;
75 struct ui_file
*gdb_stdtarg
;
76 struct ui_file
*gdb_stdtargerr
;
78 /* True if --batch or --batch-silent was seen. */
81 /* Support for the --batch-silent option. */
84 /* Support for --return-child-result option.
85 Set the default to -1 to return error in the case
86 that the program does not run or does not complete. */
87 int return_child_result
= 0;
88 int return_child_result_value
= -1;
91 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
92 static char *gdb_program_name
;
94 /* Return read only pointer to GDB_PROGRAM_NAME. */
96 get_gdb_program_name (void)
98 return gdb_program_name
;
101 static void print_gdb_help (struct ui_file
*);
103 /* Set the data-directory parameter to NEW_DATADIR.
104 If NEW_DATADIR is not a directory then a warning is printed.
105 We don't signal an error for backward compatibility. */
108 set_gdb_data_directory (const char *new_datadir
)
112 if (stat (new_datadir
, &st
) < 0)
114 int save_errno
= errno
;
116 fprintf_unfiltered (gdb_stderr
, "Warning: ");
117 print_sys_errmsg (new_datadir
, save_errno
);
119 else if (!S_ISDIR (st
.st_mode
))
120 warning (_("%s is not a directory."), new_datadir
);
123 gdb_datadir
= gdb_realpath (new_datadir
).release ();
125 /* gdb_realpath won't return an absolute path if the path doesn't exist,
126 but we still want to record an absolute path here. If the user entered
127 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
128 isn't canonical, but that's ok. */
129 if (!IS_ABSOLUTE_PATH (gdb_datadir
))
131 gdb::unique_xmalloc_ptr
<char> abs_datadir
= gdb_abspath (gdb_datadir
);
134 gdb_datadir
= abs_datadir
.release ();
138 /* Relocate a file or directory. PROGNAME is the name by which gdb
139 was invoked (i.e., argv[0]). INITIAL is the default value for the
140 file or directory. FLAG is true if the value is relocatable, false
141 otherwise. Returns a newly allocated string; this may return NULL
142 under the same conditions as make_relative_prefix. */
145 relocate_path (const char *progname
, const char *initial
, int flag
)
148 return make_relative_prefix (progname
, BINDIR
, initial
);
149 return xstrdup (initial
);
152 /* Like relocate_path, but specifically checks for a directory.
153 INITIAL is relocated according to the rules of relocate_path. If
154 the result is a directory, it is used; otherwise, INITIAL is used.
155 The chosen directory is then canonicalized using lrealpath. This
156 function always returns a newly-allocated string. */
159 relocate_gdb_directory (const char *initial
, int flag
)
163 dir
= relocate_path (gdb_program_name
, initial
, flag
);
168 if (*dir
== '\0' || stat (dir
, &s
) != 0 || !S_ISDIR (s
.st_mode
))
175 dir
= xstrdup (initial
);
177 /* Canonicalize the directory. */
180 char *canon_sysroot
= lrealpath (dir
);
192 /* Compute the locations of init files that GDB should source and
193 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
194 there is no system gdbinit (resp. home gdbinit and local gdbinit)
195 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
196 LOCAL_GDBINIT) is set to NULL. */
198 get_init_files (const char **system_gdbinit
,
199 const char **home_gdbinit
,
200 const char **local_gdbinit
)
202 static const char *sysgdbinit
= NULL
;
203 static char *homeinit
= NULL
;
204 static const char *localinit
= NULL
;
205 static int initialized
= 0;
209 struct stat homebuf
, cwdbuf
, s
;
212 if (SYSTEM_GDBINIT
[0])
214 int datadir_len
= strlen (GDB_DATADIR
);
215 int sys_gdbinit_len
= strlen (SYSTEM_GDBINIT
);
216 char *relocated_sysgdbinit
;
218 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
219 has been provided, search for SYSTEM_GDBINIT there. */
220 if (gdb_datadir_provided
221 && datadir_len
< sys_gdbinit_len
222 && filename_ncmp (SYSTEM_GDBINIT
, GDB_DATADIR
, datadir_len
) == 0
223 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT
[datadir_len
]))
225 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
227 char *tmp_sys_gdbinit
= xstrdup (&SYSTEM_GDBINIT
[datadir_len
]);
230 for (p
= tmp_sys_gdbinit
; IS_DIR_SEPARATOR (*p
); ++p
)
232 relocated_sysgdbinit
= concat (gdb_datadir
, SLASH_STRING
, p
,
234 xfree (tmp_sys_gdbinit
);
238 relocated_sysgdbinit
= relocate_path (gdb_program_name
,
240 SYSTEM_GDBINIT_RELOCATABLE
);
242 if (relocated_sysgdbinit
&& stat (relocated_sysgdbinit
, &s
) == 0)
243 sysgdbinit
= relocated_sysgdbinit
;
245 xfree (relocated_sysgdbinit
);
248 homedir
= getenv ("HOME");
250 /* If the .gdbinit file in the current directory is the same as
251 the $HOME/.gdbinit file, it should not be sourced. homebuf
252 and cwdbuf are used in that purpose. Make sure that the stats
253 are zero in case one of them fails (this guarantees that they
254 won't match if either exists). */
256 memset (&homebuf
, 0, sizeof (struct stat
));
257 memset (&cwdbuf
, 0, sizeof (struct stat
));
261 homeinit
= xstrprintf ("%s/%s", homedir
, gdbinit
);
262 if (stat (homeinit
, &homebuf
) != 0)
269 if (stat (gdbinit
, &cwdbuf
) == 0)
272 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
,
273 sizeof (struct stat
)))
280 *system_gdbinit
= sysgdbinit
;
281 *home_gdbinit
= homeinit
;
282 *local_gdbinit
= localinit
;
285 /* Try to set up an alternate signal stack for SIGSEGV handlers.
286 This allows us to handle SIGSEGV signals generated when the
287 normal process stack is exhausted. If this stack is not set
288 up (sigaltstack is unavailable or fails) and a SIGSEGV is
289 generated when the normal stack is exhausted then the program
290 will behave as though no SIGSEGV handler was installed. */
293 setup_alternate_signal_stack (void)
295 #ifdef HAVE_SIGALTSTACK
298 /* FreeBSD versions older than 11.0 use char * for ss_sp instead of
299 void *. This cast works with both types. */
300 ss
.ss_sp
= (char *) xmalloc (SIGSTKSZ
);
301 ss
.ss_size
= SIGSTKSZ
;
304 sigaltstack(&ss
, NULL
);
308 /* Call command_loop. */
310 /* Prevent inlining this function for the benefit of GDB's selftests
311 in the testsuite. Those tests want to run GDB under GDB and stop
313 static void captured_command_loop () __attribute__((noinline
));
316 captured_command_loop ()
318 struct ui
*ui
= current_ui
;
320 /* Top-level execution commands can be run in the background from
322 current_ui
->async
= 1;
324 /* Give the interpreter a chance to print a prompt, if necessary */
325 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
326 interp_pre_command_loop (top_level_interpreter ());
328 /* Now it's time to start the event loop. */
331 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
332 would clean things up (restoring the cleanup chain) to the state
333 they were just prior to the call. Technically, this means that
334 the do_cleanups() below is redundant. Unfortunately, many FUNCs
335 are not that well behaved. do_cleanups should either be replaced
336 with a do_cleanups call (to cover the problem) or an assertion
337 check to detect bad FUNCs code. */
338 do_cleanups (all_cleanups ());
339 /* If the command_loop returned, normally (rather than threw an
340 error) we try to quit. If the quit is aborted, our caller
341 catches the signal and restarts the command loop. */
342 quit_command (NULL
, ui
->instream
== ui
->stdin_stream
);
345 /* Handle command errors thrown from within catch_command_errors. */
348 handle_command_errors (struct gdb_exception e
)
352 exception_print (gdb_stderr
, e
);
354 /* If any exception escaped to here, we better enable stdin.
355 Otherwise, any command that calls async_disable_stdin, and
356 then throws, will leave stdin inoperable. */
357 async_enable_stdin ();
363 /* Type of the command callback passed to catch_command_errors. */
365 typedef void (catch_command_errors_ftype
) (char *, int);
367 /* Wrap calls to commands run before the event loop is started. */
370 catch_command_errors (catch_command_errors_ftype
*command
,
371 char *arg
, int from_tty
)
375 int was_sync
= current_ui
->prompt_state
== PROMPT_BLOCKED
;
377 command (arg
, from_tty
);
379 maybe_wait_sync_command_done (was_sync
);
381 CATCH (e
, RETURN_MASK_ALL
)
383 return handle_command_errors (e
);
390 /* Type of the command callback passed to the const
391 catch_command_errors. */
393 typedef void (catch_command_errors_const_ftype
) (const char *, int);
395 /* Const-correct catch_command_errors. */
398 catch_command_errors (catch_command_errors_const_ftype command
,
399 const char *arg
, int from_tty
)
403 int was_sync
= current_ui
->prompt_state
== PROMPT_BLOCKED
;
405 command (arg
, from_tty
);
407 maybe_wait_sync_command_done (was_sync
);
409 CATCH (e
, RETURN_MASK_ALL
)
411 return handle_command_errors (e
);
418 /* Adapter for symbol_file_add_main that translates 'from_tty' to a
419 symfile_add_flags. */
422 symbol_file_add_main_adapter (const char *arg
, int from_tty
)
424 symfile_add_flags add_flags
= 0;
427 add_flags
|= SYMFILE_VERBOSE
;
429 symbol_file_add_main (arg
, add_flags
);
432 /* Type of this option. */
435 /* Option type -x. */
438 /* Option type -ex. */
441 /* Option type -ix. */
444 /* Option type -iex. */
448 /* Arguments of --command option and its counterpart. */
451 cmdarg (cmdarg_kind type_
, char *string_
)
452 : type (type_
), string (string_
)
455 /* Type of this option. */
456 enum cmdarg_kind type
;
458 /* Value of this option - filename or the GDB command itself. String memory
459 is not owned by this structure despite it is 'const'. */
464 captured_main_1 (struct captured_main_args
*context
)
466 int argc
= context
->argc
;
467 char **argv
= context
->argv
;
469 static int quiet
= 0;
470 static int set_args
= 0;
471 static int inhibit_home_gdbinit
= 0;
473 /* Pointers to various arguments from command line. */
475 char *execarg
= NULL
;
477 char *corearg
= NULL
;
478 char *pid_or_core_arg
= NULL
;
482 /* These are static so that we can take their address in an
484 static int print_help
;
485 static int print_version
;
486 static int print_configuration
;
488 /* Pointers to all arguments of --command option. */
489 std::vector
<struct cmdarg
> cmdarg_vec
;
491 /* All arguments of --directory option. */
492 std::vector
<char *> dirarg
;
494 /* gdb init files. */
495 const char *system_gdbinit
;
496 const char *home_gdbinit
;
497 const char *local_gdbinit
;
501 struct objfile
*objfile
;
504 /* Set this before constructing scoped_command_stats. */
505 lim_at_start
= (char *) sbrk (0);
508 scoped_command_stats
stat_reporter (false);
510 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
511 setlocale (LC_MESSAGES
, "");
513 #if defined (HAVE_SETLOCALE)
514 setlocale (LC_CTYPE
, "");
517 bindtextdomain (PACKAGE
, LOCALEDIR
);
518 textdomain (PACKAGE
);
523 save_original_signals_state ();
525 saved_command_line
= (char *) xstrdup ("");
528 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
529 as a Windows pipe, and Windows buffers on pipes. */
530 setvbuf (stderr
, NULL
, _IONBF
, BUFSIZ
);
533 main_ui
= new ui (stdin
, stdout
, stderr
);
534 current_ui
= main_ui
;
536 gdb_stdtargerr
= gdb_stderr
; /* for moment */
537 gdb_stdtargin
= gdb_stdin
; /* for moment */
540 /* On Windows, argv[0] is not necessarily set to absolute form when
541 GDB is found along PATH, without which relocation doesn't work. */
542 gdb_program_name
= windows_get_absolute_argv0 (argv
[0]);
544 gdb_program_name
= xstrdup (argv
[0]);
547 /* Prefix warning messages with the command name. */
548 gdb::unique_xmalloc_ptr
<char> tmp_warn_preprint
549 (xstrprintf ("%s: warning: ", gdb_program_name
));
550 warning_pre_print
= tmp_warn_preprint
.get ();
552 current_directory
= getcwd (NULL
, 0);
553 if (current_directory
== NULL
)
554 perror_warning_with_name (_("error finding working directory"));
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;
754 cmdarg_vec
.emplace_back (CMDARG_FILE
, optarg
);
757 cmdarg_vec
.emplace_back (CMDARG_COMMAND
, optarg
);
760 cmdarg_vec
.emplace_back (CMDARG_INIT_FILE
, optarg
);
763 cmdarg_vec
.emplace_back (CMDARG_INIT_COMMAND
, optarg
);
766 batch_flag
= batch_silent
= 1;
767 gdb_stdout
= new null_file ();
770 if (optarg
[0] == '\0')
771 error (_("%s: empty path for `--data-directory'"),
773 set_gdb_data_directory (optarg
);
774 gdb_datadir_provided
= 1;
779 extern int gdbtk_test (char *);
781 if (!gdbtk_test (optarg
))
782 error (_("%s: unable to load tclcommand file \"%s\""),
783 gdb_program_name
, optarg
);
787 /* Backwards compatibility only. */
791 /* Set the external editor commands when gdb is farming out files
792 to be edited by another program. */
793 extern char *external_editor_command
;
795 external_editor_command
= xstrdup (optarg
);
800 xfree (interpreter_p
);
801 interpreter_p
= xstrdup (optarg
);
804 dirarg
.push_back (optarg
);
817 i
= strtol (optarg
, &p
, 0);
818 if (i
== 0 && p
== optarg
)
819 warning (_("could not set baud rate to `%s'."),
830 i
= strtol (optarg
, &p
, 0);
831 if (i
== 0 && p
== optarg
)
832 warning (_("could not set timeout limit to `%s'."),
840 error (_("Use `%s --help' for a complete list of options."),
849 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
850 setup_alternate_signal_stack ();
852 /* Initialize all files. */
853 gdb_init (gdb_program_name
);
855 /* Now that gdb_init has created the initial inferior, we're in
856 position to set args for that inferior. */
859 /* The remaining options are the command-line options for the
860 inferior. The first one is the sym/exec file, and the rest
863 error (_("%s: `--args' specified but no program specified"),
866 symarg
= argv
[optind
];
867 execarg
= argv
[optind
];
869 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
873 /* OK, that's all the options. */
875 /* The first argument, if specified, is the name of the
879 symarg
= argv
[optind
];
880 execarg
= argv
[optind
];
884 /* If the user hasn't already specified a PID or the name of a
885 core file, then a second optional argument is allowed. If
886 present, this argument should be interpreted as either a
887 PID or a core file, whichever works. */
888 if (pidarg
== NULL
&& corearg
== NULL
&& optind
< argc
)
890 pid_or_core_arg
= argv
[optind
];
894 /* Any argument left on the command line is unexpected and
895 will be ignored. Inform the user. */
897 fprintf_unfiltered (gdb_stderr
,
898 _("Excess command line "
899 "arguments ignored. (%s%s)\n"),
901 (optind
== argc
- 1) ? "" : " ...");
904 /* Lookup gdbinit files. Note that the gdbinit file name may be
905 overriden during file initialization, so get_init_files should be
906 called after gdb_init. */
907 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
909 /* Do these (and anything which might call wrap_here or *_filtered)
910 after initialize_all_files() but before the interpreter has been
911 installed. Otherwize the help/version messages will be eaten by
912 the interpreter's output handler. */
916 print_gdb_version (gdb_stdout
);
918 printf_filtered ("\n");
924 print_gdb_help (gdb_stdout
);
925 fputs_unfiltered ("\n", gdb_stdout
);
929 if (print_configuration
)
931 print_gdb_configuration (gdb_stdout
);
933 printf_filtered ("\n");
937 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
938 GDB retain the old MI1 interpreter startup behavior. Output the
939 copyright message before the interpreter is installed. That way
940 it isn't encapsulated in MI output. */
941 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
943 /* Print all the junk at the top, with trailing "..." if we are
944 about to read a symbol file (possibly slowly). */
945 print_gdb_version (gdb_stdout
);
947 printf_filtered ("..");
949 printf_filtered ("\n");
950 gdb_flush (gdb_stdout
); /* Force to screen during slow
954 /* Install the default UI. All the interpreters should have had a
955 look at things by now. Initialize the default interpreter. */
956 set_top_level_interpreter (interpreter_p
);
958 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
959 GDB retain the old MI1 interpreter startup behavior. Output the
960 copyright message after the interpreter is installed when it is
961 any sane interpreter. */
962 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
964 /* Print all the junk at the top, with trailing "..." if we are
965 about to read a symbol file (possibly slowly). */
966 print_gdb_version (gdb_stdout
);
968 printf_filtered ("..");
970 printf_filtered ("\n");
971 gdb_flush (gdb_stdout
); /* Force to screen during slow
975 /* Set off error and warning messages with a blank line. */
976 tmp_warn_preprint
.reset ();
977 warning_pre_print
= _("\nwarning: ");
979 /* Read and execute the system-wide gdbinit file, if it exists.
980 This is done *before* all the command line arguments are
981 processed; it sets global parameters, which are independent of
982 what file you are debugging or what directory you are in. */
983 if (system_gdbinit
&& !inhibit_gdbinit
)
984 catch_command_errors (source_script
, system_gdbinit
, 0);
986 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
987 *before* all the command line arguments are processed; it sets
988 global parameters, which are independent of what file you are
989 debugging or what directory you are in. */
991 if (home_gdbinit
&& !inhibit_gdbinit
&& !inhibit_home_gdbinit
)
992 catch_command_errors (source_script
, home_gdbinit
, 0);
994 /* Process '-ix' and '-iex' options early. */
995 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
997 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
999 switch (cmdarg_p
.type
)
1001 case CMDARG_INIT_FILE
:
1002 catch_command_errors (source_script
, cmdarg_p
.string
,
1005 case CMDARG_INIT_COMMAND
:
1006 catch_command_errors (execute_command
, cmdarg_p
.string
,
1012 /* Now perform all the actions indicated by the arguments. */
1015 catch_command_errors (cd_command
, cdarg
, 0);
1018 for (i
= 0; i
< dirarg
.size (); i
++)
1019 catch_command_errors (directory_switch
, dirarg
[i
], 0);
1021 /* Skip auto-loading section-specified scripts until we've sourced
1022 local_gdbinit (which is often used to augment the source search
1024 save_auto_load
= global_auto_load
;
1025 global_auto_load
= 0;
1029 && strcmp (execarg
, symarg
) == 0)
1031 /* The exec file and the symbol-file are the same. If we can't
1032 open it, better only print one error message.
1033 catch_command_errors returns non-zero on success! */
1034 if (catch_command_errors (exec_file_attach
, execarg
,
1036 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1041 if (execarg
!= NULL
)
1042 catch_command_errors (exec_file_attach
, execarg
,
1045 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1049 if (corearg
&& pidarg
)
1050 error (_("Can't attach to process and specify "
1051 "a core file at the same time."));
1053 if (corearg
!= NULL
)
1054 catch_command_errors (core_file_command
, corearg
, !batch_flag
);
1055 else if (pidarg
!= NULL
)
1056 catch_command_errors (attach_command
, pidarg
, !batch_flag
);
1057 else if (pid_or_core_arg
)
1059 /* The user specified 'gdb program pid' or gdb program core'.
1060 If pid_or_core_arg's first character is a digit, try attach
1061 first and then corefile. Otherwise try just corefile. */
1063 if (isdigit (pid_or_core_arg
[0]))
1065 if (catch_command_errors (attach_command
, pid_or_core_arg
,
1067 catch_command_errors (core_file_command
, pid_or_core_arg
,
1070 else /* Can't be a pid, better be a corefile. */
1071 catch_command_errors (core_file_command
, pid_or_core_arg
,
1076 set_inferior_io_terminal (ttyarg
);
1078 /* Error messages should no longer be distinguished with extra output. */
1079 warning_pre_print
= _("warning: ");
1081 /* Read the .gdbinit file in the current directory, *if* it isn't
1082 the same as the $HOME/.gdbinit file (it should exist, also). */
1085 auto_load_local_gdbinit_pathname
1086 = gdb_realpath (local_gdbinit
).release ();
1088 if (!inhibit_gdbinit
&& auto_load_local_gdbinit
1089 && file_is_auto_load_safe (local_gdbinit
,
1090 _("auto-load: Loading .gdbinit "
1094 auto_load_local_gdbinit_loaded
= 1;
1096 catch_command_errors (source_script
, local_gdbinit
, 0);
1100 /* Now that all .gdbinit's have been read and all -d options have been
1101 processed, we can read any scripts mentioned in SYMARG.
1102 We wait until now because it is common to add to the source search
1103 path in local_gdbinit. */
1104 global_auto_load
= save_auto_load
;
1105 ALL_OBJFILES (objfile
)
1106 load_auto_scripts_for_objfile (objfile
);
1108 /* Process '-x' and '-ex' options. */
1109 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
1111 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
1113 switch (cmdarg_p
.type
)
1116 catch_command_errors (source_script
, cmdarg_p
.string
,
1119 case CMDARG_COMMAND
:
1120 catch_command_errors (execute_command
, cmdarg_p
.string
,
1126 /* Read in the old history after all the command files have been
1132 /* We have hit the end of the batch file. */
1133 quit_force (NULL
, 0);
1138 captured_main (void *data
)
1140 struct captured_main_args
*context
= (struct captured_main_args
*) data
;
1142 captured_main_1 (context
);
1144 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1145 moving this loop and the code found in captured_command_loop()
1146 into the command_loop() proper. The main thing holding back that
1147 change - SET_TOP_LEVEL() - has been eliminated. */
1152 captured_command_loop ();
1154 CATCH (ex
, RETURN_MASK_ALL
)
1156 exception_print (gdb_stderr
, ex
);
1160 /* No exit -- exit is through quit_command. */
1164 gdb_main (struct captured_main_args
*args
)
1168 captured_main (args
);
1170 CATCH (ex
, RETURN_MASK_ALL
)
1172 exception_print (gdb_stderr
, ex
);
1176 /* The only way to end up here is by an error (normal exit is
1177 handled by quit_force()), hence always return an error status. */
1182 /* Don't use *_filtered for printing help. We don't want to prompt
1183 for continue no matter how small the screen or how much we're going
1187 print_gdb_help (struct ui_file
*stream
)
1189 const char *system_gdbinit
;
1190 const char *home_gdbinit
;
1191 const char *local_gdbinit
;
1193 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
1195 /* Note: The options in the list below are only approximately sorted
1196 in the alphabetical order, so as to group closely related options
1198 fputs_unfiltered (_("\
1199 This is the GNU debugger. Usage:\n\n\
1200 gdb [options] [executable-file [core-file or process-id]]\n\
1201 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1203 fputs_unfiltered (_("\
1204 Selection of debuggee and its files:\n\n\
1205 --args Arguments after executable-file are passed to inferior\n\
1206 --core=COREFILE Analyze the core dump COREFILE.\n\
1207 --exec=EXECFILE Use EXECFILE as the executable.\n\
1208 --pid=PID Attach to running process PID.\n\
1209 --directory=DIR Search for source files in DIR.\n\
1210 --se=FILE Use FILE as symbol file and executable file.\n\
1211 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1212 --readnow Fully read symbol files on first access.\n\
1213 --write Set writing into executable and core files.\n\n\
1215 fputs_unfiltered (_("\
1216 Initial commands and command files:\n\n\
1217 --command=FILE, -x Execute GDB commands from FILE.\n\
1218 --init-command=FILE, -ix\n\
1219 Like -x but execute commands before loading inferior.\n\
1220 --eval-command=COMMAND, -ex\n\
1221 Execute a single GDB command.\n\
1222 May be used multiple times and in conjunction\n\
1224 --init-eval-command=COMMAND, -iex\n\
1225 Like -ex but before loading inferior.\n\
1226 --nh Do not read ~/.gdbinit.\n\
1227 --nx Do not read any .gdbinit files in any directory.\n\n\
1229 fputs_unfiltered (_("\
1230 Output and user interface control:\n\n\
1231 --fullname Output information used by emacs-GDB interface.\n\
1232 --interpreter=INTERP\n\
1233 Select a specific interpreter / user interface\n\
1234 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1235 -w Use the GUI interface.\n\
1236 --nw Do not use the GUI interface.\n\
1239 fputs_unfiltered (_("\
1240 --tui Use a terminal user interface.\n\
1243 fputs_unfiltered (_("\
1244 --dbx DBX compatibility mode.\n\
1245 -q, --quiet, --silent\n\
1246 Do not print version number on startup.\n\n\
1248 fputs_unfiltered (_("\
1249 Operating modes:\n\n\
1250 --batch Exit after processing options.\n\
1251 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1252 --return-child-result\n\
1253 GDB exit code will be the child's exit code.\n\
1254 --configuration Print details about GDB configuration and then exit.\n\
1255 --help Print this message and then exit.\n\
1256 --version Print version information and then exit.\n\n\
1257 Remote debugging options:\n\n\
1258 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1259 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1261 --cd=DIR Change current directory to DIR.\n\
1262 --data-directory=DIR, -D\n\
1263 Set GDB's data-directory to DIR.\n\
1265 fputs_unfiltered (_("\n\
1266 At startup, GDB reads the following init files and executes their commands:\n\
1269 fprintf_unfiltered (stream
, _("\
1270 * system-wide init file: %s\n\
1271 "), system_gdbinit
);
1273 fprintf_unfiltered (stream
, _("\
1274 * user-specific init file: %s\n\
1277 fprintf_unfiltered (stream
, _("\
1278 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1280 fputs_unfiltered (_("\n\
1281 For more information, type \"help\" from within GDB, or consult the\n\
1282 GDB manual (available as on-line info or a printed manual).\n\
1284 if (REPORT_BUGS_TO
[0] && stream
== gdb_stdout
)
1285 fprintf_unfiltered (stream
, _("\
1286 Report bugs to \"%s\".\n\
1287 "), REPORT_BUGS_TO
);