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. If it happens to return, pass that through as a
309 non-zero return status. */
312 captured_command_loop (void *data
)
314 struct ui
*ui
= current_ui
;
316 /* Top-level execution commands can be run in the background from
318 current_ui
->async
= 1;
320 /* Give the interpreter a chance to print a prompt, if necessary */
321 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
322 interp_pre_command_loop (top_level_interpreter ());
324 /* Now it's time to start the event loop. */
327 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
328 would clean things up (restoring the cleanup chain) to the state
329 they were just prior to the call. Technically, this means that
330 the do_cleanups() below is redundant. Unfortunately, many FUNCs
331 are not that well behaved. do_cleanups should either be replaced
332 with a do_cleanups call (to cover the problem) or an assertion
333 check to detect bad FUNCs code. */
334 do_cleanups (all_cleanups ());
335 /* If the command_loop returned, normally (rather than threw an
336 error) we try to quit. If the quit is aborted, catch_errors()
337 which called this catch the signal and restart the command
339 quit_command (NULL
, ui
->instream
== ui
->stdin_stream
);
343 /* Handle command errors thrown from within catch_command_errors. */
346 handle_command_errors (struct gdb_exception e
)
350 exception_print (gdb_stderr
, e
);
352 /* If any exception escaped to here, we better enable stdin.
353 Otherwise, any command that calls async_disable_stdin, and
354 then throws, will leave stdin inoperable. */
355 async_enable_stdin ();
361 /* Type of the command callback passed to catch_command_errors. */
363 typedef void (catch_command_errors_ftype
) (char *, int);
365 /* Wrap calls to commands run before the event loop is started. */
368 catch_command_errors (catch_command_errors_ftype
*command
,
369 char *arg
, int from_tty
)
373 int was_sync
= current_ui
->prompt_state
== PROMPT_BLOCKED
;
375 command (arg
, from_tty
);
377 maybe_wait_sync_command_done (was_sync
);
379 CATCH (e
, RETURN_MASK_ALL
)
381 return handle_command_errors (e
);
388 /* Type of the command callback passed to the const
389 catch_command_errors. */
391 typedef void (catch_command_errors_const_ftype
) (const char *, int);
393 /* Const-correct catch_command_errors. */
396 catch_command_errors (catch_command_errors_const_ftype command
,
397 const char *arg
, int from_tty
)
401 int was_sync
= current_ui
->prompt_state
== PROMPT_BLOCKED
;
403 command (arg
, from_tty
);
405 maybe_wait_sync_command_done (was_sync
);
407 CATCH (e
, RETURN_MASK_ALL
)
409 return handle_command_errors (e
);
416 /* Adapter for symbol_file_add_main that translates 'from_tty' to a
417 symfile_add_flags. */
420 symbol_file_add_main_adapter (const char *arg
, int from_tty
)
422 symfile_add_flags add_flags
= 0;
425 add_flags
|= SYMFILE_VERBOSE
;
427 symbol_file_add_main (arg
, add_flags
);
430 /* Type of this option. */
433 /* Option type -x. */
436 /* Option type -ex. */
439 /* Option type -ix. */
442 /* Option type -iex. */
446 /* Arguments of --command option and its counterpart. */
449 cmdarg (cmdarg_kind type_
, char *string_
)
450 : type (type_
), string (string_
)
453 /* Type of this option. */
454 enum cmdarg_kind type
;
456 /* Value of this option - filename or the GDB command itself. String memory
457 is not owned by this structure despite it is 'const'. */
462 captured_main_1 (struct captured_main_args
*context
)
464 int argc
= context
->argc
;
465 char **argv
= context
->argv
;
467 static int quiet
= 0;
468 static int set_args
= 0;
469 static int inhibit_home_gdbinit
= 0;
471 /* Pointers to various arguments from command line. */
473 char *execarg
= NULL
;
475 char *corearg
= NULL
;
476 char *pid_or_core_arg
= NULL
;
480 /* These are static so that we can take their address in an
482 static int print_help
;
483 static int print_version
;
484 static int print_configuration
;
486 /* Pointers to all arguments of --command option. */
487 std::vector
<struct cmdarg
> cmdarg_vec
;
489 /* All arguments of --directory option. */
490 std::vector
<char *> dirarg
;
492 /* gdb init files. */
493 const char *system_gdbinit
;
494 const char *home_gdbinit
;
495 const char *local_gdbinit
;
499 struct objfile
*objfile
;
502 /* Set this before constructing scoped_command_stats. */
503 lim_at_start
= (char *) sbrk (0);
506 scoped_command_stats
stat_reporter (false);
508 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
509 setlocale (LC_MESSAGES
, "");
511 #if defined (HAVE_SETLOCALE)
512 setlocale (LC_CTYPE
, "");
515 bindtextdomain (PACKAGE
, LOCALEDIR
);
516 textdomain (PACKAGE
);
521 save_original_signals_state ();
523 saved_command_line
= (char *) xstrdup ("");
526 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
527 as a Windows pipe, and Windows buffers on pipes. */
528 setvbuf (stderr
, NULL
, _IONBF
, BUFSIZ
);
531 main_ui
= new ui (stdin
, stdout
, stderr
);
532 current_ui
= main_ui
;
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 gdb::unique_xmalloc_ptr
<char> tmp_warn_preprint
547 (xstrprintf ("%s: warning: ", gdb_program_name
));
548 warning_pre_print
= tmp_warn_preprint
.get ();
550 current_directory
= getcwd (NULL
, 0);
551 if (current_directory
== NULL
)
552 perror_warning_with_name (_("error finding working directory"));
554 /* Set the sysroot path. */
555 gdb_sysroot
= relocate_gdb_directory (TARGET_SYSTEM_ROOT
,
556 TARGET_SYSTEM_ROOT_RELOCATABLE
);
558 if (gdb_sysroot
== NULL
|| *gdb_sysroot
== '\0')
561 gdb_sysroot
= xstrdup (TARGET_SYSROOT_PREFIX
);
564 debug_file_directory
= relocate_gdb_directory (DEBUGDIR
,
565 DEBUGDIR_RELOCATABLE
);
567 gdb_datadir
= relocate_gdb_directory (GDB_DATADIR
,
568 GDB_DATADIR_RELOCATABLE
);
570 #ifdef WITH_PYTHON_PATH
572 /* For later use in helping Python find itself. */
573 char *tmp
= concat (WITH_PYTHON_PATH
, SLASH_STRING
, "lib", (char *) NULL
);
575 python_libdir
= relocate_gdb_directory (tmp
, PYTHON_PATH_RELOCATABLE
);
581 add_substitute_path_rule (RELOC_SRCDIR
,
582 make_relative_prefix (gdb_program_name
, BINDIR
,
586 /* There will always be an interpreter. Either the one passed into
587 this captured main, or one specified by the user at start up, or
588 the console. Initialize the interpreter to the one requested by
590 interpreter_p
= xstrdup (context
->interpreter_p
);
592 /* Parse arguments and options. */
595 /* When var field is 0, use flag field to record the equivalent
596 short option (or arbitrary numbers starting at 10 for those
597 with no equivalent). */
609 static struct option long_options
[] =
611 {"tui", no_argument
, 0, OPT_TUI
},
612 {"dbx", no_argument
, &dbx_commands
, 1},
613 {"readnow", no_argument
, &readnow_symbol_files
, 1},
614 {"r", no_argument
, &readnow_symbol_files
, 1},
615 {"quiet", no_argument
, &quiet
, 1},
616 {"q", no_argument
, &quiet
, 1},
617 {"silent", no_argument
, &quiet
, 1},
618 {"nh", no_argument
, &inhibit_home_gdbinit
, 1},
619 {"nx", no_argument
, &inhibit_gdbinit
, 1},
620 {"n", no_argument
, &inhibit_gdbinit
, 1},
621 {"batch-silent", no_argument
, 0, 'B'},
622 {"batch", no_argument
, &batch_flag
, 1},
624 /* This is a synonym for "--annotate=1". --annotate is now
625 preferred, but keep this here for a long time because people
626 will be running emacses which use --fullname. */
627 {"fullname", no_argument
, 0, 'f'},
628 {"f", no_argument
, 0, 'f'},
630 {"annotate", required_argument
, 0, OPT_ANNOTATE
},
631 {"help", no_argument
, &print_help
, 1},
632 {"se", required_argument
, 0, OPT_SE
},
633 {"symbols", required_argument
, 0, 's'},
634 {"s", required_argument
, 0, 's'},
635 {"exec", required_argument
, 0, 'e'},
636 {"e", required_argument
, 0, 'e'},
637 {"core", required_argument
, 0, 'c'},
638 {"c", required_argument
, 0, 'c'},
639 {"pid", required_argument
, 0, 'p'},
640 {"p", required_argument
, 0, 'p'},
641 {"command", required_argument
, 0, 'x'},
642 {"eval-command", required_argument
, 0, 'X'},
643 {"version", no_argument
, &print_version
, 1},
644 {"configuration", no_argument
, &print_configuration
, 1},
645 {"x", required_argument
, 0, 'x'},
646 {"ex", required_argument
, 0, 'X'},
647 {"init-command", required_argument
, 0, OPT_IX
},
648 {"init-eval-command", required_argument
, 0, OPT_IEX
},
649 {"ix", required_argument
, 0, OPT_IX
},
650 {"iex", required_argument
, 0, OPT_IEX
},
652 {"tclcommand", required_argument
, 0, 'z'},
653 {"enable-external-editor", no_argument
, 0, 'y'},
654 {"editor-command", required_argument
, 0, 'w'},
656 {"ui", required_argument
, 0, 'i'},
657 {"interpreter", required_argument
, 0, 'i'},
658 {"i", required_argument
, 0, 'i'},
659 {"directory", required_argument
, 0, 'd'},
660 {"d", required_argument
, 0, 'd'},
661 {"data-directory", required_argument
, 0, 'D'},
662 {"D", required_argument
, 0, 'D'},
663 {"cd", required_argument
, 0, OPT_CD
},
664 {"tty", required_argument
, 0, 't'},
665 {"baud", required_argument
, 0, 'b'},
666 {"b", required_argument
, 0, 'b'},
667 {"nw", no_argument
, NULL
, OPT_NOWINDOWS
},
668 {"nowindows", no_argument
, NULL
, OPT_NOWINDOWS
},
669 {"w", no_argument
, NULL
, OPT_WINDOWS
},
670 {"windows", no_argument
, NULL
, OPT_WINDOWS
},
671 {"statistics", no_argument
, 0, OPT_STATISTICS
},
672 {"write", no_argument
, &write_files
, 1},
673 {"args", no_argument
, &set_args
, 1},
674 {"l", required_argument
, 0, 'l'},
675 {"return-child-result", no_argument
, &return_child_result
, 1},
676 {0, no_argument
, 0, 0}
683 c
= getopt_long_only (argc
, argv
, "",
684 long_options
, &option_index
);
685 if (c
== EOF
|| set_args
)
688 /* Long option that takes an argument. */
689 if (c
== 0 && long_options
[option_index
].flag
== 0)
690 c
= long_options
[option_index
].val
;
695 /* Long option that just sets a flag. */
705 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
706 annotation_level
= atoi (optarg
);
709 /* Enable the display of both time and space usage. */
710 set_per_command_time (1);
711 set_per_command_space (1);
714 /* --tui is equivalent to -i=tui. */
716 xfree (interpreter_p
);
717 interpreter_p
= xstrdup (INTERP_TUI
);
719 error (_("%s: TUI mode is not supported"), gdb_program_name
);
723 /* FIXME: cagney/2003-03-01: Not sure if this option is
724 actually useful, and if it is, what it should do. */
726 /* --windows is equivalent to -i=insight. */
727 xfree (interpreter_p
);
728 interpreter_p
= xstrdup (INTERP_INSIGHT
);
732 /* -nw is equivalent to -i=console. */
733 xfree (interpreter_p
);
734 interpreter_p
= xstrdup (INTERP_CONSOLE
);
737 annotation_level
= 1;
752 cmdarg_vec
.emplace_back (CMDARG_FILE
, optarg
);
755 cmdarg_vec
.emplace_back (CMDARG_COMMAND
, optarg
);
758 cmdarg_vec
.emplace_back (CMDARG_INIT_FILE
, optarg
);
761 cmdarg_vec
.emplace_back (CMDARG_INIT_COMMAND
, optarg
);
764 batch_flag
= batch_silent
= 1;
765 gdb_stdout
= new null_file ();
768 if (optarg
[0] == '\0')
769 error (_("%s: empty path for `--data-directory'"),
771 set_gdb_data_directory (optarg
);
772 gdb_datadir_provided
= 1;
777 extern int gdbtk_test (char *);
779 if (!gdbtk_test (optarg
))
780 error (_("%s: unable to load tclcommand file \"%s\""),
781 gdb_program_name
, optarg
);
785 /* Backwards compatibility only. */
789 /* Set the external editor commands when gdb is farming out files
790 to be edited by another program. */
791 extern char *external_editor_command
;
793 external_editor_command
= xstrdup (optarg
);
798 xfree (interpreter_p
);
799 interpreter_p
= xstrdup (optarg
);
802 dirarg
.push_back (optarg
);
815 i
= strtol (optarg
, &p
, 0);
816 if (i
== 0 && p
== optarg
)
817 warning (_("could not set baud rate to `%s'."),
828 i
= strtol (optarg
, &p
, 0);
829 if (i
== 0 && p
== optarg
)
830 warning (_("could not set timeout limit to `%s'."),
838 error (_("Use `%s --help' for a complete list of options."),
847 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
848 setup_alternate_signal_stack ();
850 /* Initialize all files. */
851 gdb_init (gdb_program_name
);
853 /* Now that gdb_init has created the initial inferior, we're in
854 position to set args for that inferior. */
857 /* The remaining options are the command-line options for the
858 inferior. The first one is the sym/exec file, and the rest
861 error (_("%s: `--args' specified but no program specified"),
864 symarg
= argv
[optind
];
865 execarg
= argv
[optind
];
867 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
871 /* OK, that's all the options. */
873 /* The first argument, if specified, is the name of the
877 symarg
= argv
[optind
];
878 execarg
= argv
[optind
];
882 /* If the user hasn't already specified a PID or the name of a
883 core file, then a second optional argument is allowed. If
884 present, this argument should be interpreted as either a
885 PID or a core file, whichever works. */
886 if (pidarg
== NULL
&& corearg
== NULL
&& optind
< argc
)
888 pid_or_core_arg
= argv
[optind
];
892 /* Any argument left on the command line is unexpected and
893 will be ignored. Inform the user. */
895 fprintf_unfiltered (gdb_stderr
,
896 _("Excess command line "
897 "arguments ignored. (%s%s)\n"),
899 (optind
== argc
- 1) ? "" : " ...");
902 /* Lookup gdbinit files. Note that the gdbinit file name may be
903 overriden during file initialization, so get_init_files should be
904 called after gdb_init. */
905 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
907 /* Do these (and anything which might call wrap_here or *_filtered)
908 after initialize_all_files() but before the interpreter has been
909 installed. Otherwize the help/version messages will be eaten by
910 the interpreter's output handler. */
914 print_gdb_version (gdb_stdout
);
916 printf_filtered ("\n");
922 print_gdb_help (gdb_stdout
);
923 fputs_unfiltered ("\n", gdb_stdout
);
927 if (print_configuration
)
929 print_gdb_configuration (gdb_stdout
);
931 printf_filtered ("\n");
935 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
936 GDB retain the old MI1 interpreter startup behavior. Output the
937 copyright message before the interpreter is installed. That way
938 it isn't encapsulated in MI output. */
939 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
941 /* Print all the junk at the top, with trailing "..." if we are
942 about to read a symbol file (possibly slowly). */
943 print_gdb_version (gdb_stdout
);
945 printf_filtered ("..");
947 printf_filtered ("\n");
948 gdb_flush (gdb_stdout
); /* Force to screen during slow
952 /* Install the default UI. All the interpreters should have had a
953 look at things by now. Initialize the default interpreter. */
954 set_top_level_interpreter (interpreter_p
);
956 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
957 GDB retain the old MI1 interpreter startup behavior. Output the
958 copyright message after the interpreter is installed when it is
959 any sane interpreter. */
960 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
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 /* Set off error and warning messages with a blank line. */
974 tmp_warn_preprint
.reset ();
975 warning_pre_print
= _("\nwarning: ");
977 /* Read and execute the system-wide gdbinit file, if it exists.
978 This is done *before* all the command line arguments are
979 processed; it sets global parameters, which are independent of
980 what file you are debugging or what directory you are in. */
981 if (system_gdbinit
&& !inhibit_gdbinit
)
982 catch_command_errors (source_script
, system_gdbinit
, 0);
984 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
985 *before* all the command line arguments are processed; it sets
986 global parameters, which are independent of what file you are
987 debugging or what directory you are in. */
989 if (home_gdbinit
&& !inhibit_gdbinit
&& !inhibit_home_gdbinit
)
990 catch_command_errors (source_script
, home_gdbinit
, 0);
992 /* Process '-ix' and '-iex' options early. */
993 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
995 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
997 switch (cmdarg_p
.type
)
999 case CMDARG_INIT_FILE
:
1000 catch_command_errors (source_script
, cmdarg_p
.string
,
1003 case CMDARG_INIT_COMMAND
:
1004 catch_command_errors (execute_command
, cmdarg_p
.string
,
1010 /* Now perform all the actions indicated by the arguments. */
1013 catch_command_errors (cd_command
, cdarg
, 0);
1016 for (i
= 0; i
< dirarg
.size (); i
++)
1017 catch_command_errors (directory_switch
, dirarg
[i
], 0);
1019 /* Skip auto-loading section-specified scripts until we've sourced
1020 local_gdbinit (which is often used to augment the source search
1022 save_auto_load
= global_auto_load
;
1023 global_auto_load
= 0;
1027 && strcmp (execarg
, symarg
) == 0)
1029 /* The exec file and the symbol-file are the same. If we can't
1030 open it, better only print one error message.
1031 catch_command_errors returns non-zero on success! */
1032 if (catch_command_errors (exec_file_attach
, execarg
,
1034 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1039 if (execarg
!= NULL
)
1040 catch_command_errors (exec_file_attach
, execarg
,
1043 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1047 if (corearg
&& pidarg
)
1048 error (_("Can't attach to process and specify "
1049 "a core file at the same time."));
1051 if (corearg
!= NULL
)
1052 catch_command_errors (core_file_command
, corearg
, !batch_flag
);
1053 else if (pidarg
!= NULL
)
1054 catch_command_errors (attach_command
, pidarg
, !batch_flag
);
1055 else if (pid_or_core_arg
)
1057 /* The user specified 'gdb program pid' or gdb program core'.
1058 If pid_or_core_arg's first character is a digit, try attach
1059 first and then corefile. Otherwise try just corefile. */
1061 if (isdigit (pid_or_core_arg
[0]))
1063 if (catch_command_errors (attach_command
, pid_or_core_arg
,
1065 catch_command_errors (core_file_command
, pid_or_core_arg
,
1068 else /* Can't be a pid, better be a corefile. */
1069 catch_command_errors (core_file_command
, pid_or_core_arg
,
1074 set_inferior_io_terminal (ttyarg
);
1076 /* Error messages should no longer be distinguished with extra output. */
1077 warning_pre_print
= _("warning: ");
1079 /* Read the .gdbinit file in the current directory, *if* it isn't
1080 the same as the $HOME/.gdbinit file (it should exist, also). */
1083 auto_load_local_gdbinit_pathname
1084 = gdb_realpath (local_gdbinit
).release ();
1086 if (!inhibit_gdbinit
&& auto_load_local_gdbinit
1087 && file_is_auto_load_safe (local_gdbinit
,
1088 _("auto-load: Loading .gdbinit "
1092 auto_load_local_gdbinit_loaded
= 1;
1094 catch_command_errors (source_script
, local_gdbinit
, 0);
1098 /* Now that all .gdbinit's have been read and all -d options have been
1099 processed, we can read any scripts mentioned in SYMARG.
1100 We wait until now because it is common to add to the source search
1101 path in local_gdbinit. */
1102 global_auto_load
= save_auto_load
;
1103 ALL_OBJFILES (objfile
)
1104 load_auto_scripts_for_objfile (objfile
);
1106 /* Process '-x' and '-ex' options. */
1107 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
1109 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
1111 switch (cmdarg_p
.type
)
1114 catch_command_errors (source_script
, cmdarg_p
.string
,
1117 case CMDARG_COMMAND
:
1118 catch_command_errors (execute_command
, cmdarg_p
.string
,
1124 /* Read in the old history after all the command files have been
1130 /* We have hit the end of the batch file. */
1131 quit_force (NULL
, 0);
1136 captured_main (void *data
)
1138 struct captured_main_args
*context
= (struct captured_main_args
*) data
;
1140 captured_main_1 (context
);
1142 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1143 moving this loop and the code found in captured_command_loop()
1144 into the command_loop() proper. The main thing holding back that
1145 change - SET_TOP_LEVEL() - has been eliminated. */
1148 catch_errors (captured_command_loop
, 0, "", RETURN_MASK_ALL
);
1150 /* No exit -- exit is through quit_command. */
1154 gdb_main (struct captured_main_args
*args
)
1158 captured_main (args
);
1160 CATCH (ex
, RETURN_MASK_ALL
)
1162 exception_print (gdb_stderr
, ex
);
1166 /* The only way to end up here is by an error (normal exit is
1167 handled by quit_force()), hence always return an error status. */
1172 /* Don't use *_filtered for printing help. We don't want to prompt
1173 for continue no matter how small the screen or how much we're going
1177 print_gdb_help (struct ui_file
*stream
)
1179 const char *system_gdbinit
;
1180 const char *home_gdbinit
;
1181 const char *local_gdbinit
;
1183 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
1185 /* Note: The options in the list below are only approximately sorted
1186 in the alphabetical order, so as to group closely related options
1188 fputs_unfiltered (_("\
1189 This is the GNU debugger. Usage:\n\n\
1190 gdb [options] [executable-file [core-file or process-id]]\n\
1191 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1193 fputs_unfiltered (_("\
1194 Selection of debuggee and its files:\n\n\
1195 --args Arguments after executable-file are passed to inferior\n\
1196 --core=COREFILE Analyze the core dump COREFILE.\n\
1197 --exec=EXECFILE Use EXECFILE as the executable.\n\
1198 --pid=PID Attach to running process PID.\n\
1199 --directory=DIR Search for source files in DIR.\n\
1200 --se=FILE Use FILE as symbol file and executable file.\n\
1201 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1202 --readnow Fully read symbol files on first access.\n\
1203 --write Set writing into executable and core files.\n\n\
1205 fputs_unfiltered (_("\
1206 Initial commands and command files:\n\n\
1207 --command=FILE, -x Execute GDB commands from FILE.\n\
1208 --init-command=FILE, -ix\n\
1209 Like -x but execute commands before loading inferior.\n\
1210 --eval-command=COMMAND, -ex\n\
1211 Execute a single GDB command.\n\
1212 May be used multiple times and in conjunction\n\
1214 --init-eval-command=COMMAND, -iex\n\
1215 Like -ex but before loading inferior.\n\
1216 --nh Do not read ~/.gdbinit.\n\
1217 --nx Do not read any .gdbinit files in any directory.\n\n\
1219 fputs_unfiltered (_("\
1220 Output and user interface control:\n\n\
1221 --fullname Output information used by emacs-GDB interface.\n\
1222 --interpreter=INTERP\n\
1223 Select a specific interpreter / user interface\n\
1224 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1225 -w Use the GUI interface.\n\
1226 --nw Do not use the GUI interface.\n\
1229 fputs_unfiltered (_("\
1230 --tui Use a terminal user interface.\n\
1233 fputs_unfiltered (_("\
1234 --dbx DBX compatibility mode.\n\
1235 -q, --quiet, --silent\n\
1236 Do not print version number on startup.\n\n\
1238 fputs_unfiltered (_("\
1239 Operating modes:\n\n\
1240 --batch Exit after processing options.\n\
1241 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1242 --return-child-result\n\
1243 GDB exit code will be the child's exit code.\n\
1244 --configuration Print details about GDB configuration and then exit.\n\
1245 --help Print this message and then exit.\n\
1246 --version Print version information and then exit.\n\n\
1247 Remote debugging options:\n\n\
1248 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1249 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1251 --cd=DIR Change current directory to DIR.\n\
1252 --data-directory=DIR, -D\n\
1253 Set GDB's data-directory to DIR.\n\
1255 fputs_unfiltered (_("\n\
1256 At startup, GDB reads the following init files and executes their commands:\n\
1259 fprintf_unfiltered (stream
, _("\
1260 * system-wide init file: %s\n\
1261 "), system_gdbinit
);
1263 fprintf_unfiltered (stream
, _("\
1264 * user-specific init file: %s\n\
1267 fprintf_unfiltered (stream
, _("\
1268 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1270 fputs_unfiltered (_("\n\
1271 For more information, type \"help\" from within GDB, or consult the\n\
1272 GDB manual (available as on-line info or a printed manual).\n\
1274 if (REPORT_BUGS_TO
[0] && stream
== gdb_stdout
)
1275 fprintf_unfiltered (stream
, _("\
1276 Report bugs to \"%s\".\n\
1277 "), REPORT_BUGS_TO
);