1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009, 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "call-cmds.h"
25 #include "cli/cli-cmds.h"
26 #include "cli/cli-script.h"
27 #include "cli/cli-setshow.h"
28 #include "cli/cli-decode.h"
31 #include "exceptions.h"
34 #include "breakpoint.h"
36 #include "expression.h"
39 #include "terminal.h" /* For job_control. */
41 #include "completer.h"
46 #include "gdb_assert.h"
48 #include "event-loop.h"
49 #include "gdbthread.h"
51 /* readline include files */
52 #include "readline/readline.h"
53 #include "readline/history.h"
55 /* readline defines this. */
58 #include <sys/types.h>
60 #include "event-top.h"
61 #include "gdb_string.h"
67 /* Default command line prompt. This is overriden in some configs. */
69 #ifndef DEFAULT_PROMPT
70 #define DEFAULT_PROMPT "(gdb) "
73 /* Initialization file name for gdb. This is overridden in some configs. */
77 # define PATH_MAX FILENAME_MAX
83 #ifndef GDBINIT_FILENAME
84 #define GDBINIT_FILENAME ".gdbinit"
86 char gdbinit
[PATH_MAX
+ 1] = GDBINIT_FILENAME
;
88 int inhibit_gdbinit
= 0;
90 /* If nonzero, and GDB has been configured to be able to use windows,
91 attempt to open them upon startup. */
95 extern char lang_frame_mismatch_warn
[]; /* language.c */
97 /* Flag for whether we want all the "from_tty" gubbish printed. */
99 int caution
= 1; /* Default is yes, sigh. */
101 show_caution (struct ui_file
*file
, int from_tty
,
102 struct cmd_list_element
*c
, const char *value
)
104 fprintf_filtered (file
, _("\
105 Whether to confirm potentially dangerous operations is %s.\n"),
109 /* stdio stream that command input is being read from. Set to stdin normally.
110 Set by source_command to the file we are sourcing. Set to NULL if we are
111 executing a user-defined command or interacting via a GUI. */
115 /* Flag to indicate whether a user defined command is currently running. */
119 /* Current working directory. */
121 char *current_directory
;
123 /* The directory name is actually stored here (usually). */
124 char gdb_dirbuf
[1024];
126 /* Function to call before reading a command, if nonzero.
127 The function receives two args: an input stream,
128 and a prompt string. */
130 void (*window_hook
) (FILE *, char *);
135 /* Buffer used for reading command lines, and the size
136 allocated for it so far. */
141 /* Nonzero if the current command is modified by "server ". This
142 affects things like recording into the command history, commands
143 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
144 whatever) can issue its own commands and also send along commands
145 from the user, and have the user not notice that the user interface
146 is issuing commands too. */
149 /* Baud rate specified for talking to serial target systems. Default
150 is left as -1, so targets can choose their own defaults. */
151 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
152 or (unsigned int)-1. This is a Bad User Interface. */
156 /* Timeout limit for response from target. */
158 /* The default value has been changed many times over the years. It
159 was originally 5 seconds. But that was thought to be a long time
160 to sit and wait, so it was changed to 2 seconds. That was thought
161 to be plenty unless the connection was going through some terminal
162 server or multiplexer or other form of hairy serial connection.
164 In mid-1996, remote_timeout was moved from remote.c to top.c and
165 it began being used in other remote-* targets. It appears that the
166 default was changed to 20 seconds at that time, perhaps because the
167 Renesas E7000 ICE didn't always respond in a timely manner.
169 But if 5 seconds is a long time to sit and wait for retransmissions,
170 20 seconds is far worse. This demonstrates the difficulty of using
171 a single variable for all protocol timeouts.
173 As remote.c is used much more than remote-e7000.c, it was changed
174 back to 2 seconds in 1999. */
176 int remote_timeout
= 2;
178 /* Non-zero tells remote* modules to output debugging info. */
180 int remote_debug
= 0;
182 /* Sbrk location on entry to main. Used for statistics only. */
187 /* Hooks for alternate command interfaces. */
189 /* Called after most modules have been initialized, but before taking users
192 If the UI fails to initialize and it wants GDB to continue
193 using the default UI, then it should clear this hook before returning. */
195 void (*deprecated_init_ui_hook
) (char *argv0
);
197 /* This hook is called from within gdb's many mini-event loops which could
198 steal control from a real user interface's event loop. It returns
199 non-zero if the user is requesting a detach, zero otherwise. */
201 int (*deprecated_ui_loop_hook
) (int);
203 /* Called instead of command_loop at top level. Can be invoked via
204 throw_exception(). */
206 void (*deprecated_command_loop_hook
) (void);
209 /* Called from print_frame_info to list the line we stopped in. */
211 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
, int line
,
212 int stopline
, int noerror
);
213 /* Replaces most of query. */
215 int (*deprecated_query_hook
) (const char *, va_list);
217 /* Replaces most of warning. */
219 void (*deprecated_warning_hook
) (const char *, va_list);
221 /* These three functions support getting lines of text from the user.
222 They are used in sequence. First deprecated_readline_begin_hook is
223 called with a text string that might be (for example) a message for
224 the user to type in a sequence of commands to be executed at a
225 breakpoint. If this function calls back to a GUI, it might take
226 this opportunity to pop up a text interaction window with this
227 message. Next, deprecated_readline_hook is called with a prompt
228 that is emitted prior to collecting the user input. It can be
229 called multiple times. Finally, deprecated_readline_end_hook is
230 called to notify the GUI that we are done with the interaction
231 window and it can close it. */
233 void (*deprecated_readline_begin_hook
) (char *, ...);
234 char *(*deprecated_readline_hook
) (char *);
235 void (*deprecated_readline_end_hook
) (void);
237 /* Called as appropriate to notify the interface that we have attached
238 to or detached from an already running process. */
240 void (*deprecated_attach_hook
) (void);
241 void (*deprecated_detach_hook
) (void);
243 /* Called during long calculations to allow GUI to repair window damage, and to
244 check for stop buttons, etc... */
246 void (*deprecated_interactive_hook
) (void);
248 /* Tell the GUI someone changed the register REGNO. -1 means
249 that the caller does not know which register changed or
250 that several registers have changed (see value_assign). */
251 void (*deprecated_register_changed_hook
) (int regno
);
253 /* Called when going to wait for the target. Usually allows the GUI to run
254 while waiting for target events. */
256 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
257 struct target_waitstatus
*status
,
260 /* Used by UI as a wrapper around command execution. May do various things
261 like enabling/disabling buttons, etc... */
263 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
, char *cmd
,
266 /* Called after a `set' command has finished. Is only run if the
267 `set' command succeeded. */
269 void (*deprecated_set_hook
) (struct cmd_list_element
* c
);
271 /* Called when the current thread changes. Argument is thread id. */
273 void (*deprecated_context_hook
) (int id
);
275 /* Handler for SIGHUP. */
278 /* NOTE 1999-04-29: This function will be static again, once we modify
279 gdb to use the event loop as the default command loop and we merge
280 event-top.c into this file, top.c */
284 caution
= 0; /* Throw caution to the wind -- we're exiting.
285 This prevents asking the user dumb questions. */
286 quit_command ((char *) 0, 0);
289 #endif /* defined SIGHUP */
291 /* Line number we are currently in in a file which is being sourced. */
292 /* NOTE 1999-04-29: This variable will be static again, once we modify
293 gdb to use the event loop as the default command loop and we merge
294 event-top.c into this file, top.c */
295 /* static */ int source_line_number
;
297 /* Name of the file we are sourcing. */
298 /* NOTE 1999-04-29: This variable will be static again, once we modify
299 gdb to use the event loop as the default command loop and we merge
300 event-top.c into this file, top.c */
301 /* static */ const char *source_file_name
;
303 /* Clean up on error during a "source" command (or execution of a
304 user-defined command). */
307 do_restore_instream_cleanup (void *stream
)
309 /* Restore the previous input stream. */
313 /* Read commands from STREAM. */
315 read_command_file (FILE *stream
)
317 struct cleanup
*cleanups
;
319 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
322 do_cleanups (cleanups
);
325 void (*pre_init_ui_hook
) (void);
329 do_chdir_cleanup (void *old_dir
)
337 prepare_execute_command (void)
341 /* With multiple threads running while the one we're examining is stopped,
342 the dcache can get stale without us being able to detect it.
343 For the duration of the command, though, use the dcache to help
344 things like backtrace. */
346 target_dcache_invalidate ();
349 /* Execute the line P as a command, in the current user context.
350 Pass FROM_TTY as second argument to the defining function. */
353 execute_command (char *p
, int from_tty
)
355 struct cmd_list_element
*c
;
357 static int warned
= 0;
360 prepare_execute_command ();
362 /* Force cleanup of any alloca areas if using C alloca instead of
366 /* This can happen when command_line_input hits end of file. */
370 target_log_command (p
);
372 while (*p
== ' ' || *p
== '\t')
379 /* If trace-commands is set then this will print this command. */
380 print_command_trace (p
);
382 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
384 /* Pass null arg rather than an empty one. */
387 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
388 while the is_complete_command(cfunc) test is just plain
389 bogus. They should both be replaced by a test of the form
390 c->strip_trailing_white_space_p. */
391 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
392 can't be replaced with func. This is because it is the
393 cfunc, and not the func, that has the value that the
394 is_complete_command hack is testing for. */
395 /* Clear off trailing whitespace, except for set and complete
398 && c
->type
!= set_cmd
399 && !is_complete_command (c
))
401 p
= arg
+ strlen (arg
) - 1;
402 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
407 /* If this command has been pre-hooked, run the hook first. */
408 execute_cmd_pre_hook (c
);
410 if (c
->flags
& DEPRECATED_WARN_USER
)
411 deprecated_cmd_warning (&line
);
413 if (c
->class == class_user
)
414 execute_user_command (c
, arg
);
415 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
416 do_setshow_command (arg
, from_tty
& caution
, c
);
417 else if (!cmd_func_p (c
))
418 error (_("That is not a command, just a help topic."));
419 else if (deprecated_call_command_hook
)
420 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
422 cmd_func (c
, arg
, from_tty
& caution
);
424 /* If this command has been post-hooked, run the hook last. */
425 execute_cmd_post_hook (c
);
429 /* Tell the user if the language has changed (except first time).
430 First make sure that a new frame has been selected, in case this
431 command or the hooks changed the program state. */
432 deprecated_safe_get_selected_frame ();
433 if (current_language
!= expected_language
)
435 if (language_mode
== language_mode_auto
&& info_verbose
)
437 language_info (1); /* Print what changed. */
442 /* Warn the user if the working language does not match the
443 language of the current frame. Only warn the user if we are
444 actually running the program, i.e. there is a stack. */
445 /* FIXME: This should be cacheing the frame and only running when
446 the frame changes. */
448 if (has_stack_frames ())
450 flang
= get_frame_language ();
452 && flang
!= language_unknown
453 && flang
!= current_language
->la_language
)
455 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
461 /* Run execute_command for P and FROM_TTY. Capture its output into the
462 returned string, do not display it to the screen. BATCH_FLAG will be
463 temporarily set to true. */
466 execute_command_to_string (char *p
, int from_tty
)
468 struct ui_file
*str_file
;
469 struct cleanup
*cleanup
;
472 /* GDB_STDOUT should be better already restored during these
473 restoration callbacks. */
474 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
476 str_file
= mem_fileopen ();
478 make_cleanup_ui_file_delete (str_file
);
479 make_cleanup_restore_ui_file (&gdb_stdout
);
480 make_cleanup_restore_ui_file (&gdb_stderr
);
481 make_cleanup_restore_ui_file (&gdb_stdlog
);
482 make_cleanup_restore_ui_file (&gdb_stdtarg
);
483 make_cleanup_restore_ui_file (&gdb_stdtargerr
);
485 if (ui_out_redirect (uiout
, str_file
) < 0)
486 warning (_("Current output protocol does not support redirection"));
488 make_cleanup_ui_out_redirect_pop (uiout
);
490 gdb_stdout
= str_file
;
491 gdb_stderr
= str_file
;
492 gdb_stdlog
= str_file
;
493 gdb_stdtarg
= str_file
;
494 gdb_stdtargerr
= str_file
;
496 execute_command (p
, from_tty
);
498 retval
= ui_file_xstrdup (str_file
, NULL
);
500 do_cleanups (cleanup
);
505 /* Read commands from `instream' and execute them
506 until end of file or error reading instream. */
511 struct cleanup
*old_chain
;
513 int stdin_is_tty
= ISATTY (stdin
);
515 while (instream
&& !feof (instream
))
517 if (window_hook
&& instream
== stdin
)
518 (*window_hook
) (instream
, get_prompt ());
521 if (instream
== stdin
&& stdin_is_tty
)
522 reinitialize_more_filter ();
523 old_chain
= make_cleanup (null_cleanup
, 0);
525 /* Get a command-line. This calls the readline package. */
526 command
= command_line_input (instream
== stdin
?
527 get_prompt () : (char *) NULL
,
528 instream
== stdin
, "prompt");
532 make_command_stats_cleanup (1);
534 execute_command (command
, instream
== stdin
);
536 /* Do any commands attached to breakpoint we are stopped at. */
537 bpstat_do_actions ();
539 do_cleanups (old_chain
);
543 /* Commands call this if they do not want to be repeated by null lines. */
551 /* If we aren't reading from standard input, we are saving the last
552 thing read from stdin in line and don't want to delete it. Null lines
553 won't repeat here in any case. */
554 if (instream
== stdin
)
558 /* Read a line from the stream "instream" without command line editing.
560 It prints PROMPT_ARG once at the start.
561 Action is compatible with "readline", e.g. space for the result is
562 malloc'd and should be freed by the caller.
564 A NULL return means end of file. */
566 gdb_readline (char *prompt_arg
)
571 int result_size
= 80;
575 /* Don't use a _filtered function here. It causes the assumed
576 character position to be off, since the newline we read from
577 the user is not accounted for. */
578 fputs_unfiltered (prompt_arg
, gdb_stdout
);
579 gdb_flush (gdb_stdout
);
582 result
= (char *) xmalloc (result_size
);
586 /* Read from stdin if we are executing a user defined command.
587 This is the right thing for prompt_for_continue, at least. */
588 c
= fgetc (instream
? instream
: stdin
);
593 /* The last line does not end with a newline. Return it, and
594 if we are called again fgetc will still return EOF and
595 we'll return NULL then. */
603 if (input_index
> 0 && result
[input_index
- 1] == '\r')
608 result
[input_index
++] = c
;
609 while (input_index
>= result_size
)
612 result
= (char *) xrealloc (result
, result_size
);
616 result
[input_index
++] = '\0';
620 /* Variables which control command line editing and history
621 substitution. These variables are given default values at the end
623 static int command_editing_p
;
625 /* NOTE 1999-04-29: This variable will be static again, once we modify
626 gdb to use the event loop as the default command loop and we merge
627 event-top.c into this file, top.c */
629 /* static */ int history_expansion_p
;
631 static int write_history_p
;
633 show_write_history_p (struct ui_file
*file
, int from_tty
,
634 struct cmd_list_element
*c
, const char *value
)
636 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
640 static int history_size
;
642 show_history_size (struct ui_file
*file
, int from_tty
,
643 struct cmd_list_element
*c
, const char *value
)
645 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
649 static char *history_filename
;
651 show_history_filename (struct ui_file
*file
, int from_tty
,
652 struct cmd_list_element
*c
, const char *value
)
654 fprintf_filtered (file
, _("\
655 The filename in which to record the command history is \"%s\".\n"),
659 /* This is like readline(), but it has some gdb-specific behavior.
660 gdb may want readline in both the synchronous and async modes during
661 a single gdb invocation. At the ordinary top-level prompt we might
662 be using the async readline. That means we can't use
663 rl_pre_input_hook, since it doesn't work properly in async mode.
664 However, for a secondary prompt (" >", such as occurs during a
665 `define'), gdb wants a synchronous response.
667 We used to call readline() directly, running it in synchronous
668 mode. But mixing modes this way is not supported, and as of
669 readline 5.x it no longer works; the arrow keys come unbound during
670 the synchronous call. So we make a nested call into the event
671 loop. That's what gdb_readline_wrapper is for. */
673 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
674 rely on gdb_readline_wrapper_result, which might still be NULL if
675 the user types Control-D for EOF. */
676 static int gdb_readline_wrapper_done
;
678 /* The result of the current call to gdb_readline_wrapper, once a newline
680 static char *gdb_readline_wrapper_result
;
682 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
683 to be called after the newline is processed (which will redisplay
684 the prompt). But in gdb_readline_wrapper we will not get a new
685 prompt until the next call, or until we return to the event loop.
686 So we disable this hook around the newline and restore it before we
688 static void (*saved_after_char_processing_hook
) (void);
690 /* This function is called when readline has seen a complete line of
694 gdb_readline_wrapper_line (char *line
)
696 gdb_assert (!gdb_readline_wrapper_done
);
697 gdb_readline_wrapper_result
= line
;
698 gdb_readline_wrapper_done
= 1;
700 /* Prevent operate-and-get-next from acting too early. */
701 saved_after_char_processing_hook
= after_char_processing_hook
;
702 after_char_processing_hook
= NULL
;
704 /* Prevent parts of the prompt from being redisplayed if annotations
705 are enabled, and readline's state getting out of sync. */
706 if (async_command_editing_p
)
707 rl_callback_handler_remove ();
710 struct gdb_readline_wrapper_cleanup
712 void (*handler_orig
) (char *);
713 int already_prompted_orig
;
717 gdb_readline_wrapper_cleanup (void *arg
)
719 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
721 rl_already_prompted
= cleanup
->already_prompted_orig
;
723 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
724 input_handler
= cleanup
->handler_orig
;
725 gdb_readline_wrapper_result
= NULL
;
726 gdb_readline_wrapper_done
= 0;
728 after_char_processing_hook
= saved_after_char_processing_hook
;
729 saved_after_char_processing_hook
= NULL
;
735 gdb_readline_wrapper (char *prompt
)
737 struct cleanup
*back_to
;
738 struct gdb_readline_wrapper_cleanup
*cleanup
;
741 cleanup
= xmalloc (sizeof (*cleanup
));
742 cleanup
->handler_orig
= input_handler
;
743 input_handler
= gdb_readline_wrapper_line
;
745 cleanup
->already_prompted_orig
= rl_already_prompted
;
747 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
749 /* Display our prompt and prevent double prompt display. */
750 display_gdb_prompt (prompt
);
751 rl_already_prompted
= 1;
753 if (after_char_processing_hook
)
754 (*after_char_processing_hook
) ();
755 gdb_assert (after_char_processing_hook
== NULL
);
757 /* gdb_do_one_event argument is unused. */
758 while (gdb_do_one_event (NULL
) >= 0)
759 if (gdb_readline_wrapper_done
)
762 retval
= gdb_readline_wrapper_result
;
763 do_cleanups (back_to
);
768 /* The current saved history number from operate-and-get-next.
769 This is -1 if not valid. */
770 static int operate_saved_history
= -1;
772 /* This is put on the appropriate hook and helps operate-and-get-next
775 gdb_rl_operate_and_get_next_completion (void)
777 int delta
= where_history () - operate_saved_history
;
779 /* The `key' argument to rl_get_previous_history is ignored. */
780 rl_get_previous_history (delta
, 0);
781 operate_saved_history
= -1;
783 /* readline doesn't automatically update the display for us. */
786 after_char_processing_hook
= NULL
;
787 rl_pre_input_hook
= NULL
;
790 /* This is a gdb-local readline command handler. It accepts the
791 current command line (like RET does) and, if this command was taken
792 from the history, arranges for the next command in the history to
793 appear on the command line when the prompt returns.
794 We ignore the arguments. */
796 gdb_rl_operate_and_get_next (int count
, int key
)
800 /* Use the async hook. */
801 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
803 /* Find the current line, and find the next line to use. */
804 where
= where_history();
806 /* FIXME: kettenis/20020817: max_input_history is renamed into
807 history_max_entries in readline-4.2. When we do a new readline
808 import, we should probably change it here too, even though
809 readline maintains backwards compatibility for now by still
810 defining max_input_history. */
811 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
812 (where
>= history_length
- 1))
813 operate_saved_history
= where
;
815 operate_saved_history
= where
+ 1;
817 return rl_newline (1, key
);
820 /* Read one line from the command input stream `instream'
821 into the local static buffer `linebuffer' (whose current length
823 The buffer is made bigger as necessary.
824 Returns the address of the start of the line.
826 NULL is returned for end of file.
828 *If* the instream == stdin & stdin is a terminal, the line read
829 is copied into the file line saver (global var char *line,
830 length linesize) so that it can be duplicated.
832 This routine either uses fancy command line editing or
833 simple input as the user has requested. */
836 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
838 static char *linebuffer
= 0;
839 static unsigned linelength
= 0;
843 char *local_prompt
= prompt_arg
;
847 /* The annotation suffix must be non-NULL. */
848 if (annotation_suffix
== NULL
)
849 annotation_suffix
= "";
851 if (annotation_level
> 1 && instream
== stdin
)
853 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
854 + strlen (annotation_suffix
) + 40);
855 if (prompt_arg
== NULL
)
856 local_prompt
[0] = '\0';
858 strcpy (local_prompt
, prompt_arg
);
859 strcat (local_prompt
, "\n\032\032");
860 strcat (local_prompt
, annotation_suffix
);
861 strcat (local_prompt
, "\n");
867 linebuffer
= (char *) xmalloc (linelength
);
872 /* Control-C quits instantly if typed while in this loop
873 since it should not wait until the user types a newline. */
877 signal (STOP_SIGNAL
, handle_stop_sig
);
882 /* Make sure that all output has been output. Some machines may let
883 you get away with leaving out some of the gdb_flush, but not all. */
885 gdb_flush (gdb_stdout
);
886 gdb_flush (gdb_stderr
);
888 if (source_file_name
!= NULL
)
889 ++source_line_number
;
891 if (annotation_level
> 1 && instream
== stdin
)
893 puts_unfiltered ("\n\032\032pre-");
894 puts_unfiltered (annotation_suffix
);
895 puts_unfiltered ("\n");
898 /* Don't use fancy stuff if not talking to stdin. */
899 if (deprecated_readline_hook
&& input_from_terminal_p ())
901 rl
= (*deprecated_readline_hook
) (local_prompt
);
903 else if (command_editing_p
&& input_from_terminal_p ())
905 rl
= gdb_readline_wrapper (local_prompt
);
909 rl
= gdb_readline (local_prompt
);
912 if (annotation_level
> 1 && instream
== stdin
)
914 puts_unfiltered ("\n\032\032post-");
915 puts_unfiltered (annotation_suffix
);
916 puts_unfiltered ("\n");
919 if (!rl
|| rl
== (char *) EOF
)
924 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
926 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
927 nline
= (char *) xrealloc (linebuffer
, linelength
);
928 p
+= nline
- linebuffer
;
932 /* Copy line. Don't copy null at end. (Leaves line alone
933 if this was just a newline) */
937 xfree (rl
); /* Allocated in readline. */
939 if (p
== linebuffer
|| *(p
- 1) != '\\')
942 p
--; /* Put on top of '\'. */
943 local_prompt
= (char *) 0;
948 signal (STOP_SIGNAL
, SIG_DFL
);
955 #define SERVER_COMMAND_LENGTH 7
957 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
958 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
961 /* Note that we don't set `line'. Between this and the check in
962 dont_repeat, this insures that repeating will still do the
965 return linebuffer
+ SERVER_COMMAND_LENGTH
;
968 /* Do history expansion if that is wished. */
969 if (history_expansion_p
&& instream
== stdin
970 && ISATTY (instream
))
975 *p
= '\0'; /* Insert null now. */
976 expanded
= history_expand (linebuffer
, &history_value
);
979 /* Print the changes. */
980 printf_unfiltered ("%s\n", history_value
);
982 /* If there was an error, call this function again. */
985 xfree (history_value
);
986 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
988 if (strlen (history_value
) > linelength
)
990 linelength
= strlen (history_value
) + 1;
991 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
993 strcpy (linebuffer
, history_value
);
994 p
= linebuffer
+ strlen (linebuffer
);
996 xfree (history_value
);
999 /* If we just got an empty line, and that is supposed
1000 to repeat the previous command, return the value in the
1002 if (repeat
&& p
== linebuffer
)
1004 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1010 /* Add line to history if appropriate. */
1011 if (instream
== stdin
1012 && ISATTY (stdin
) && *linebuffer
)
1013 add_history (linebuffer
);
1015 /* Note: lines consisting solely of comments are added to the command
1016 history. This is useful when you type a command, and then
1017 realize you don't want to execute it quite yet. You can comment
1018 out the command and then later fetch it from the value history
1019 and remove the '#'. The kill ring is probably better, but some
1020 people are in the habit of commenting things out. */
1022 *p1
= '\0'; /* Found a comment. */
1024 /* Save into global buffer if appropriate. */
1027 if (linelength
> linesize
)
1029 line
= xrealloc (line
, linelength
);
1030 linesize
= linelength
;
1032 strcpy (line
, linebuffer
);
1039 /* Print the GDB banner. */
1041 print_gdb_version (struct ui_file
*stream
)
1043 /* From GNU coding standards, first line is meant to be easy for a
1044 program to parse, and is just canonical program name and version
1045 number, which starts after last space. */
1047 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1049 /* Second line is a copyright notice. */
1051 fprintf_filtered (stream
, "Copyright (C) 2010 Free Software Foundation, Inc.\n");
1053 /* Following the copyright is a brief statement that the program is
1054 free software, that users are free to copy and change it on
1055 certain conditions, that it is covered by the GNU GPL, and that
1056 there is no warranty. */
1058 fprintf_filtered (stream
, "\
1059 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1060 This is free software: you are free to change and redistribute it.\n\
1061 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1062 and \"show warranty\" for details.\n");
1064 /* After the required info we print the configuration information. */
1066 fprintf_filtered (stream
, "This GDB was configured as \"");
1067 if (strcmp (host_name
, target_name
) != 0)
1069 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1073 fprintf_filtered (stream
, "%s", host_name
);
1075 fprintf_filtered (stream
, "\".");
1077 if (REPORT_BUGS_TO
[0])
1079 fprintf_filtered (stream
,
1080 _("\nFor bug reporting instructions, please see:\n"));
1081 fprintf_filtered (stream
, "%s.", REPORT_BUGS_TO
);
1085 /* get_prompt: access method for the GDB prompt string. */
1094 set_prompt (char *s
)
1096 /* ??rehrauer: I don't know why this fails, since it looks as though
1097 assignments to prompt are wrapped in calls to xstrdup...
1101 PROMPT (0) = xstrdup (s
);
1111 /* Callback for iterate_over_inferiors. Kills or detaches the given
1112 inferior, depending on how we originally gained control of it. */
1115 kill_or_detach (struct inferior
*inf
, void *args
)
1117 struct qt_args
*qt
= args
;
1118 struct thread_info
*thread
;
1123 thread
= any_thread_of_process (inf
->pid
);
1126 switch_to_thread (thread
->ptid
);
1128 /* Leave core files alone. */
1129 if (target_has_execution
)
1131 if (inf
->attach_flag
)
1132 target_detach (qt
->args
, qt
->from_tty
);
1141 /* Callback for iterate_over_inferiors. Prints info about what GDB
1142 will do to each inferior on a "quit". ARG points to a struct
1143 ui_out where output is to be collected. */
1146 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1148 struct ui_file
*stb
= arg
;
1153 if (inf
->attach_flag
)
1154 fprintf_filtered (stb
,
1155 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1156 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1158 fprintf_filtered (stb
,
1159 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1160 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1165 /* If necessary, make the user confirm that we should quit. Return
1166 non-zero if we should quit, zero if we shouldn't. */
1171 struct ui_file
*stb
;
1172 struct cleanup
*old_chain
;
1176 /* Don't even ask if we're only debugging a core file inferior. */
1177 if (!have_live_inferiors ())
1180 /* Build the query string as a single string. */
1181 stb
= mem_fileopen ();
1182 old_chain
= make_cleanup_ui_file_delete (stb
);
1184 /* This is something of a hack. But there's no reliable way to see
1185 if a GUI is running. The `use_windows' variable doesn't cut
1187 if (deprecated_init_ui_hook
)
1188 fprintf_filtered (stb
, _("A debugging session is active.\n"
1189 "Do you still want to close the debugger?"));
1192 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1193 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1194 fprintf_filtered (stb
, _("\nQuit anyway? "));
1197 str
= ui_file_xstrdup (stb
, NULL
);
1198 make_cleanup (xfree
, str
);
1200 qr
= query ("%s", str
);
1201 do_cleanups (old_chain
);
1205 /* Helper routine for quit_force that requires error handling. */
1208 quit_target (void *arg
)
1210 struct qt_args
*qt
= (struct qt_args
*)arg
;
1212 /* Kill or detach all inferiors. */
1213 iterate_over_inferiors (kill_or_detach
, qt
);
1215 /* Give all pushed targets a chance to do minimal cleanup, and pop
1217 pop_all_targets (1);
1219 /* Save the history information if it is appropriate to do so. */
1220 if (write_history_p
&& history_filename
)
1221 write_history (history_filename
);
1223 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1228 /* Quit without asking for confirmation. */
1231 quit_force (char *args
, int from_tty
)
1236 /* An optional expression may be used to cause gdb to terminate with the
1237 value of that expression. */
1240 struct value
*val
= parse_and_eval (args
);
1242 exit_code
= (int) value_as_long (val
);
1244 else if (return_child_result
)
1245 exit_code
= return_child_result_value
;
1248 qt
.from_tty
= from_tty
;
1250 /* We want to handle any quit errors and exit regardless. */
1251 catch_errors (quit_target
, &qt
,
1252 "Quitting: ", RETURN_MASK_ALL
);
1257 /* If OFF, the debugger will run in non-interactive mode, which means
1258 that it will automatically select the default answer to all the
1259 queries made to the user. If ON, gdb will wait for the user to
1260 answer all queries. If AUTO, gdb will determine whether to run
1261 in interactive mode or not depending on whether stdin is a terminal
1263 static enum auto_boolean interactive_mode
= AUTO_BOOLEAN_AUTO
;
1265 /* Implement the "show interactive-mode" option. */
1268 show_interactive_mode (struct ui_file
*file
, int from_tty
,
1269 struct cmd_list_element
*c
,
1272 if (interactive_mode
== AUTO_BOOLEAN_AUTO
)
1273 fprintf_filtered (file
, "\
1274 Debugger's interactive mode is %s (currently %s).\n",
1275 value
, input_from_terminal_p () ? "on" : "off");
1277 fprintf_filtered (file
, "Debugger's interactive mode is %s.\n", value
);
1280 /* Returns whether GDB is running on a terminal and input is
1281 currently coming from that terminal. */
1284 input_from_terminal_p (void)
1286 if (interactive_mode
!= AUTO_BOOLEAN_AUTO
)
1287 return interactive_mode
== AUTO_BOOLEAN_TRUE
;
1292 if (gdb_has_a_terminal () && instream
== stdin
)
1295 /* If INSTREAM is unset, and we are not in a user command, we
1296 must be in Insight. That's like having a terminal, for our
1298 if (instream
== NULL
&& !in_user_command
)
1305 dont_repeat_command (char *ignored
, int from_tty
)
1307 *line
= 0; /* Can't call dont_repeat here because we're not
1308 necessarily reading from stdin. */
1311 /* Functions to manipulate command line editing control variables. */
1313 /* Number of commands to print in each call to show_commands. */
1314 #define Hist_print 10
1316 show_commands (char *args
, int from_tty
)
1318 /* Index for history commands. Relative to history_base. */
1321 /* Number of the history entry which we are planning to display next.
1322 Relative to history_base. */
1325 /* The first command in the history which doesn't exist (i.e. one more
1326 than the number of the last command). Relative to history_base. */
1329 /* Print out some of the commands from the command history. */
1330 /* First determine the length of the history list. */
1331 hist_len
= history_size
;
1332 for (offset
= 0; offset
< history_size
; offset
++)
1334 if (!history_get (history_base
+ offset
))
1343 if (args
[0] == '+' && args
[1] == '\0')
1344 /* "info editing +" should print from the stored position. */
1347 /* "info editing <exp>" should print around command number <exp>. */
1348 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1350 /* "show commands" means print the last Hist_print commands. */
1353 num
= hist_len
- Hist_print
;
1359 /* If there are at least Hist_print commands, we want to display the last
1360 Hist_print rather than, say, the last 6. */
1361 if (hist_len
- num
< Hist_print
)
1363 num
= hist_len
- Hist_print
;
1368 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1370 printf_filtered ("%5d %s\n", history_base
+ offset
,
1371 (history_get (history_base
+ offset
))->line
);
1374 /* The next command we want to display is the next one that we haven't
1378 /* If the user repeats this command with return, it should do what
1379 "show commands +" does. This is unnecessary if arg is null,
1380 because "show commands +" is not useful after "show commands". */
1381 if (from_tty
&& args
)
1388 /* Called by do_setshow_command. */
1390 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1392 if (history_size
== INT_MAX
)
1393 unstifle_history ();
1394 else if (history_size
>= 0)
1395 stifle_history (history_size
);
1398 history_size
= INT_MAX
;
1399 error (_("History size must be non-negative"));
1404 set_history (char *args
, int from_tty
)
1406 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1407 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1411 show_history (char *args
, int from_tty
)
1413 cmd_show_list (showhistlist
, from_tty
, "");
1416 int info_verbose
= 0; /* Default verbose msgs off */
1418 /* Called by do_setshow_command. An elaborate joke. */
1420 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1422 char *cmdname
= "verbose";
1423 struct cmd_list_element
*showcmd
;
1425 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1429 c
->doc
= "Set verbose printing of informational messages.";
1430 showcmd
->doc
= "Show verbose printing of informational messages.";
1434 c
->doc
= "Set verbosity.";
1435 showcmd
->doc
= "Show verbosity.";
1439 /* Init the history buffer. Note that we are called after the init file(s)
1440 * have been read so that the user can change the history file via his
1441 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1442 * overrides all of this.
1450 tmpenv
= getenv ("HISTSIZE");
1452 history_size
= atoi (tmpenv
);
1453 else if (!history_size
)
1456 stifle_history (history_size
);
1458 tmpenv
= getenv ("GDBHISTFILE");
1460 history_filename
= xstrdup (tmpenv
);
1461 else if (!history_filename
)
1463 /* We include the current directory so that if the user changes
1464 directories the file written will be the same as the one
1467 /* No leading dots in file names are allowed on MSDOS. */
1468 history_filename
= concat (current_directory
, "/_gdb_history",
1471 history_filename
= concat (current_directory
, "/.gdb_history",
1475 read_history (history_filename
);
1479 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1480 struct cmd_list_element
*c
, const char *value
)
1482 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1486 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1487 struct cmd_list_element
*c
, const char *value
)
1489 fprintf_filtered (file
, _("\
1490 Editing of command lines as they are typed is %s.\n"),
1495 show_annotation_level (struct ui_file
*file
, int from_tty
,
1496 struct cmd_list_element
*c
, const char *value
)
1498 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1502 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1503 struct cmd_list_element
*c
, const char *value
)
1505 fprintf_filtered (file
, _("\
1506 Notification of completion for asynchronous execution commands is %s.\n"),
1512 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1513 whatever the DEFAULT_PROMPT is. */
1514 the_prompts
.top
= 0;
1516 PROMPT (0) = xstrdup (DEFAULT_PROMPT
);
1518 /* Set things up for annotation_level > 1, if the user ever decides
1520 async_annotation_suffix
= "prompt";
1521 /* Set the variable associated with the setshow prompt command. */
1522 new_async_prompt
= xstrdup (PROMPT (0));
1524 /* If gdb was started with --annotate=2, this is equivalent to the
1525 user entering the command 'set annotate 2' at the gdb prompt, so
1526 we need to do extra processing. */
1527 if (annotation_level
> 1)
1528 set_async_annotation_level (NULL
, 0, NULL
);
1530 /* Set the important stuff up for command editing. */
1531 command_editing_p
= 1;
1532 history_expansion_p
= 0;
1533 write_history_p
= 0;
1535 /* Setup important stuff for command line editing. */
1536 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1537 rl_completion_entry_function
= readline_line_completion_function
;
1538 rl_completer_word_break_characters
= default_word_break_characters ();
1539 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1540 rl_readline_name
= "gdb";
1541 rl_terminal_name
= getenv ("TERM");
1543 /* The name for this defun comes from Bash, where it originated.
1544 15 is Control-o, the same binding this function has in Bash. */
1545 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1547 add_setshow_string_cmd ("prompt", class_support
,
1548 &new_async_prompt
, _("\
1549 Set gdb's prompt"), _("\
1550 Show gdb's prompt"), NULL
,
1552 show_new_async_prompt
,
1553 &setlist
, &showlist
);
1555 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1556 Don't repeat this command.\n\
1557 Primarily used inside of user-defined commands that should not be repeated when\n\
1560 add_setshow_boolean_cmd ("editing", class_support
,
1561 &async_command_editing_p
, _("\
1562 Set editing of command lines as they are typed."), _("\
1563 Show editing of command lines as they are typed."), _("\
1564 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1565 Without an argument, command line editing is enabled. To edit, use\n\
1566 EMACS-like or VI-like commands like control-P or ESC."),
1567 set_async_editing_command
,
1568 show_async_command_editing_p
,
1569 &setlist
, &showlist
);
1571 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1572 Set saving of the history record on exit."), _("\
1573 Show saving of the history record on exit."), _("\
1574 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1575 Without an argument, saving is enabled."),
1577 show_write_history_p
,
1578 &sethistlist
, &showhistlist
);
1580 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1581 Set the size of the command history,"), _("\
1582 Show the size of the command history,"), _("\
1583 ie. the number of previous commands to keep a record of."),
1584 set_history_size_command
,
1586 &sethistlist
, &showhistlist
);
1588 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1589 Set the filename in which to record the command history"), _("\
1590 Show the filename in which to record the command history"), _("\
1591 (the list of previous commands of which a record is kept)."),
1593 show_history_filename
,
1594 &sethistlist
, &showhistlist
);
1596 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1597 Set whether to confirm potentially dangerous operations."), _("\
1598 Show whether to confirm potentially dangerous operations."), NULL
,
1601 &setlist
, &showlist
);
1603 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1604 Set annotation_level."), _("\
1605 Show annotation_level."), _("\
1606 0 == normal; 1 == fullname (for use when running under emacs)\n\
1607 2 == output annotated suitably for use by programs that control GDB."),
1608 set_async_annotation_level
,
1609 show_annotation_level
,
1610 &setlist
, &showlist
);
1612 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1613 &exec_done_display_p
, _("\
1614 Set notification of completion for asynchronous execution commands."), _("\
1615 Show notification of completion for asynchronous execution commands."), _("\
1616 Use \"on\" to enable the notification, and \"off\" to disable it."),
1618 show_exec_done_display_p
,
1619 &setlist
, &showlist
);
1621 add_setshow_auto_boolean_cmd ("interactive-mode", class_support
,
1622 &interactive_mode
, _("\
1623 Set whether GDB should run in interactive mode or not"), _("\
1624 Show whether GDB runs in interactive mode"), _("\
1625 If on, run in interactive mode and wait for the user to answer\n\
1626 all queries. If off, run in non-interactive mode and automatically\n\
1627 assume the default answer to all queries. If auto (the default),\n\
1628 determine which mode to use based on the standard input settings"),
1630 show_interactive_mode
,
1631 &setlist
, &showlist
);
1633 add_setshow_filename_cmd ("data-directory", class_maintenance
,
1634 &gdb_datadir
, _("Set GDB's data directory."),
1635 _("Show GDB's data directory."),
1637 When set, GDB uses the specified path to search for data files."),
1644 gdb_init (char *argv0
)
1646 if (pre_init_ui_hook
)
1647 pre_init_ui_hook ();
1649 /* Run the init function of each source file */
1652 /* Make sure we return to the original directory upon exit, come
1653 what may, since the OS doesn't do that for us. */
1654 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1657 init_cmd_lists (); /* This needs to be done first */
1658 initialize_targets (); /* Setup target_terminal macros for utils.c */
1659 initialize_utils (); /* Make errors and warnings possible */
1660 initialize_all_files ();
1661 /* This creates the current_program_space. Do this after all the
1662 _initialize_foo routines have had a chance to install their
1663 per-sspace data keys. Also do this before
1664 initialize_current_architecture is called, because it accesses
1665 exec_bfd of the current program space. */
1666 initialize_progspace ();
1667 initialize_inferiors ();
1668 initialize_current_architecture ();
1670 init_main (); /* But that omits this file! Do it now */
1672 initialize_stdin_serial ();
1674 async_init_signals ();
1676 /* We need a default language for parsing expressions, so simple things like
1677 "set width 0" won't fail if no language is explicitly set in a config file
1678 or implicitly set by reading an executable during startup. */
1679 set_language (language_c
);
1680 expected_language
= current_language
; /* don't warn about the change. */
1682 /* Allow another UI to initialize. If the UI fails to initialize,
1683 and it wants GDB to revert to the CLI, it should clear
1684 deprecated_init_ui_hook. */
1685 if (deprecated_init_ui_hook
)
1686 deprecated_init_ui_hook (argv0
);