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 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 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
191 #define STOP_SIGNAL SIGTSTP
192 static void stop_sig (int);
196 /* Hooks for alternate command interfaces. */
198 /* Called after most modules have been initialized, but before taking users
201 If the UI fails to initialize and it wants GDB to continue
202 using the default UI, then it should clear this hook before returning. */
204 void (*deprecated_init_ui_hook
) (char *argv0
);
206 /* This hook is called from within gdb's many mini-event loops which could
207 steal control from a real user interface's event loop. It returns
208 non-zero if the user is requesting a detach, zero otherwise. */
210 int (*deprecated_ui_loop_hook
) (int);
212 /* Called instead of command_loop at top level. Can be invoked via
213 throw_exception(). */
215 void (*deprecated_command_loop_hook
) (void);
218 /* Called from print_frame_info to list the line we stopped in. */
220 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
, int line
,
221 int stopline
, int noerror
);
222 /* Replaces most of query. */
224 int (*deprecated_query_hook
) (const char *, va_list);
226 /* Replaces most of warning. */
228 void (*deprecated_warning_hook
) (const char *, va_list);
230 /* These three functions support getting lines of text from the user.
231 They are used in sequence. First deprecated_readline_begin_hook is
232 called with a text string that might be (for example) a message for
233 the user to type in a sequence of commands to be executed at a
234 breakpoint. If this function calls back to a GUI, it might take
235 this opportunity to pop up a text interaction window with this
236 message. Next, deprecated_readline_hook is called with a prompt
237 that is emitted prior to collecting the user input. It can be
238 called multiple times. Finally, deprecated_readline_end_hook is
239 called to notify the GUI that we are done with the interaction
240 window and it can close it. */
242 void (*deprecated_readline_begin_hook
) (char *, ...);
243 char *(*deprecated_readline_hook
) (char *);
244 void (*deprecated_readline_end_hook
) (void);
246 /* Called as appropriate to notify the interface that we have attached
247 to or detached from an already running process. */
249 void (*deprecated_attach_hook
) (void);
250 void (*deprecated_detach_hook
) (void);
252 /* Called during long calculations to allow GUI to repair window damage, and to
253 check for stop buttons, etc... */
255 void (*deprecated_interactive_hook
) (void);
257 /* Tell the GUI someone changed the register REGNO. -1 means
258 that the caller does not know which register changed or
259 that several registers have changed (see value_assign). */
260 void (*deprecated_register_changed_hook
) (int regno
);
262 /* Tell the GUI someone changed LEN bytes of memory at ADDR */
263 void (*deprecated_memory_changed_hook
) (CORE_ADDR addr
, int len
);
265 /* Called when going to wait for the target. Usually allows the GUI to run
266 while waiting for target events. */
268 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
269 struct target_waitstatus
* status
);
271 /* Used by UI as a wrapper around command execution. May do various things
272 like enabling/disabling buttons, etc... */
274 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
, char *cmd
,
277 /* Called after a `set' command has finished. Is only run if the
278 `set' command succeeded. */
280 void (*deprecated_set_hook
) (struct cmd_list_element
* c
);
282 /* Called when the current thread changes. Argument is thread id. */
284 void (*deprecated_context_hook
) (int id
);
286 /* Takes control from error (). Typically used to prevent longjmps out of the
287 middle of the GUI. Usually used in conjunction with a catch routine. */
289 void (*deprecated_error_hook
) (void);
291 /* Handler for SIGHUP. */
294 /* NOTE 1999-04-29: This function will be static again, once we modify
295 gdb to use the event loop as the default command loop and we merge
296 event-top.c into this file, top.c */
300 caution
= 0; /* Throw caution to the wind -- we're exiting.
301 This prevents asking the user dumb questions. */
302 quit_command ((char *) 0, 0);
305 #endif /* defined SIGHUP */
307 /* Line number we are currently in in a file which is being sourced. */
308 /* NOTE 1999-04-29: This variable will be static again, once we modify
309 gdb to use the event loop as the default command loop and we merge
310 event-top.c into this file, top.c */
311 /* static */ int source_line_number
;
313 /* Name of the file we are sourcing. */
314 /* NOTE 1999-04-29: This variable will be static again, once we modify
315 gdb to use the event loop as the default command loop and we merge
316 event-top.c into this file, top.c */
317 /* static */ char *source_file_name
;
319 /* Clean up on error during a "source" command (or execution of a
320 user-defined command). */
323 do_restore_instream_cleanup (void *stream
)
325 /* Restore the previous input stream. */
329 /* Read commands from STREAM. */
331 read_command_file (FILE *stream
)
333 struct cleanup
*cleanups
;
335 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
338 do_cleanups (cleanups
);
341 void (*pre_init_ui_hook
) (void);
345 do_chdir_cleanup (void *old_dir
)
352 /* Execute the line P as a command.
353 Pass FROM_TTY as second argument to the defining function. */
355 /* Execute command P, in the current user context. */
358 execute_command (char *p
, int from_tty
)
360 struct cmd_list_element
*c
;
362 static int warned
= 0;
364 long time_at_cmd_start
= 0;
366 long space_at_cmd_start
= 0;
368 extern int display_time
;
369 extern int display_space
;
371 if (target_can_async_p ())
373 time_at_cmd_start
= get_run_time ();
378 char *lim
= (char *) sbrk (0);
379 space_at_cmd_start
= lim
- lim_at_start
;
386 /* Force cleanup of any alloca areas if using C alloca instead of
390 /* This can happen when command_line_input hits end of file. */
394 target_log_command (p
);
396 while (*p
== ' ' || *p
== '\t')
403 /* If trace-commands is set then this will print this command. */
404 print_command_trace (p
);
406 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
408 /* If the selected thread has terminated, we allow only a
409 limited set of commands. */
410 if (target_can_async_p ()
411 && is_exited (inferior_ptid
)
412 && !get_cmd_no_selected_thread_ok (c
))
414 Cannot execute this command without a live selected thread. See `help thread'."));
416 /* Pass null arg rather than an empty one. */
419 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
420 while the is_complete_command(cfunc) test is just plain
421 bogus. They should both be replaced by a test of the form
422 c->strip_trailing_white_space_p. */
423 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
424 can't be replaced with func. This is because it is the
425 cfunc, and not the func, that has the value that the
426 is_complete_command hack is testing for. */
427 /* Clear off trailing whitespace, except for set and complete
430 && c
->type
!= set_cmd
431 && !is_complete_command (c
))
433 p
= arg
+ strlen (arg
) - 1;
434 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
439 /* If this command has been pre-hooked, run the hook first. */
440 execute_cmd_pre_hook (c
);
442 if (c
->flags
& DEPRECATED_WARN_USER
)
443 deprecated_cmd_warning (&line
);
445 if (c
->class == class_user
)
446 execute_user_command (c
, arg
);
447 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
448 do_setshow_command (arg
, from_tty
& caution
, c
);
449 else if (!cmd_func_p (c
))
450 error (_("That is not a command, just a help topic."));
451 else if (deprecated_call_command_hook
)
452 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
454 cmd_func (c
, arg
, from_tty
& caution
);
456 /* If this command has been post-hooked, run the hook last. */
457 execute_cmd_post_hook (c
);
461 /* Tell the user if the language has changed (except first time). */
462 if (current_language
!= expected_language
)
464 if (language_mode
== language_mode_auto
)
466 language_info (1); /* Print what changed. */
471 /* Warn the user if the working language does not match the
472 language of the current frame. Only warn the user if we are
473 actually running the program, i.e. there is a stack. */
474 /* FIXME: This should be cacheing the frame and only running when
475 the frame changes. */
477 if (target_has_stack
&& is_stopped (inferior_ptid
))
479 flang
= get_frame_language ();
481 && flang
!= language_unknown
482 && flang
!= current_language
->la_language
)
484 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
490 /* Read commands from `instream' and execute them
491 until end of file or error reading instream. */
496 struct cleanup
*old_chain
;
498 int stdin_is_tty
= ISATTY (stdin
);
499 long time_at_cmd_start
;
501 long space_at_cmd_start
= 0;
503 extern int display_time
;
504 extern int display_space
;
506 while (instream
&& !feof (instream
))
508 if (window_hook
&& instream
== stdin
)
509 (*window_hook
) (instream
, get_prompt ());
512 if (instream
== stdin
&& stdin_is_tty
)
513 reinitialize_more_filter ();
514 old_chain
= make_cleanup (null_cleanup
, 0);
516 /* Get a command-line. This calls the readline package. */
517 command
= command_line_input (instream
== stdin
?
518 get_prompt () : (char *) NULL
,
519 instream
== stdin
, "prompt");
523 time_at_cmd_start
= get_run_time ();
528 char *lim
= (char *) sbrk (0);
529 space_at_cmd_start
= lim
- lim_at_start
;
533 execute_command (command
, instream
== stdin
);
535 /* Do any commands attached to breakpoint we are stopped at. */
536 bpstat_do_actions ();
538 do_cleanups (old_chain
);
542 long cmd_time
= get_run_time () - time_at_cmd_start
;
544 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
545 cmd_time
/ 1000000, cmd_time
% 1000000);
551 char *lim
= (char *) sbrk (0);
552 long space_now
= lim
- lim_at_start
;
553 long space_diff
= space_now
- space_at_cmd_start
;
555 printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"),
557 (space_diff
>= 0 ? "+" : ""),
564 /* Commands call this if they do not want to be repeated by null lines. */
572 /* If we aren't reading from standard input, we are saving the last
573 thing read from stdin in line and don't want to delete it. Null lines
574 won't repeat here in any case. */
575 if (instream
== stdin
)
579 /* Read a line from the stream "instream" without command line editing.
581 It prints PROMPT_ARG once at the start.
582 Action is compatible with "readline", e.g. space for the result is
583 malloc'd and should be freed by the caller.
585 A NULL return means end of file. */
587 gdb_readline (char *prompt_arg
)
592 int result_size
= 80;
596 /* Don't use a _filtered function here. It causes the assumed
597 character position to be off, since the newline we read from
598 the user is not accounted for. */
599 fputs_unfiltered (prompt_arg
, gdb_stdout
);
600 gdb_flush (gdb_stdout
);
603 result
= (char *) xmalloc (result_size
);
607 /* Read from stdin if we are executing a user defined command.
608 This is the right thing for prompt_for_continue, at least. */
609 c
= fgetc (instream
? instream
: stdin
);
614 /* The last line does not end with a newline. Return it, and
615 if we are called again fgetc will still return EOF and
616 we'll return NULL then. */
624 if (input_index
> 0 && result
[input_index
- 1] == '\r')
629 result
[input_index
++] = c
;
630 while (input_index
>= result_size
)
633 result
= (char *) xrealloc (result
, result_size
);
637 result
[input_index
++] = '\0';
641 /* Variables which control command line editing and history
642 substitution. These variables are given default values at the end
644 static int command_editing_p
;
646 /* NOTE 1999-04-29: This variable will be static again, once we modify
647 gdb to use the event loop as the default command loop and we merge
648 event-top.c into this file, top.c */
650 /* static */ int history_expansion_p
;
652 static int write_history_p
;
654 show_write_history_p (struct ui_file
*file
, int from_tty
,
655 struct cmd_list_element
*c
, const char *value
)
657 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
661 static int history_size
;
663 show_history_size (struct ui_file
*file
, int from_tty
,
664 struct cmd_list_element
*c
, const char *value
)
666 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
670 static char *history_filename
;
672 show_history_filename (struct ui_file
*file
, int from_tty
,
673 struct cmd_list_element
*c
, const char *value
)
675 fprintf_filtered (file
, _("\
676 The filename in which to record the command history is \"%s\".\n"),
680 /* This is like readline(), but it has some gdb-specific behavior.
681 gdb may want readline in both the synchronous and async modes during
682 a single gdb invocation. At the ordinary top-level prompt we might
683 be using the async readline. That means we can't use
684 rl_pre_input_hook, since it doesn't work properly in async mode.
685 However, for a secondary prompt (" >", such as occurs during a
686 `define'), gdb wants a synchronous response.
688 We used to call readline() directly, running it in synchronous
689 mode. But mixing modes this way is not supported, and as of
690 readline 5.x it no longer works; the arrow keys come unbound during
691 the synchronous call. So we make a nested call into the event
692 loop. That's what gdb_readline_wrapper is for. */
694 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
695 rely on gdb_readline_wrapper_result, which might still be NULL if
696 the user types Control-D for EOF. */
697 static int gdb_readline_wrapper_done
;
699 /* The result of the current call to gdb_readline_wrapper, once a newline
701 static char *gdb_readline_wrapper_result
;
703 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
704 to be called after the newline is processed (which will redisplay
705 the prompt). But in gdb_readline_wrapper we will not get a new
706 prompt until the next call, or until we return to the event loop.
707 So we disable this hook around the newline and restore it before we
709 static void (*saved_after_char_processing_hook
) (void);
711 /* This function is called when readline has seen a complete line of
715 gdb_readline_wrapper_line (char *line
)
717 gdb_assert (!gdb_readline_wrapper_done
);
718 gdb_readline_wrapper_result
= line
;
719 gdb_readline_wrapper_done
= 1;
721 /* Prevent operate-and-get-next from acting too early. */
722 saved_after_char_processing_hook
= after_char_processing_hook
;
723 after_char_processing_hook
= NULL
;
725 /* Prevent parts of the prompt from being redisplayed if annotations
726 are enabled, and readline's state getting out of sync. */
727 if (async_command_editing_p
)
728 rl_callback_handler_remove ();
731 struct gdb_readline_wrapper_cleanup
733 void (*handler_orig
) (char *);
734 int already_prompted_orig
;
738 gdb_readline_wrapper_cleanup (void *arg
)
740 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
742 rl_already_prompted
= cleanup
->already_prompted_orig
;
744 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
745 input_handler
= cleanup
->handler_orig
;
746 gdb_readline_wrapper_result
= NULL
;
747 gdb_readline_wrapper_done
= 0;
749 after_char_processing_hook
= saved_after_char_processing_hook
;
750 saved_after_char_processing_hook
= NULL
;
756 gdb_readline_wrapper (char *prompt
)
758 struct cleanup
*back_to
;
759 struct gdb_readline_wrapper_cleanup
*cleanup
;
762 cleanup
= xmalloc (sizeof (*cleanup
));
763 cleanup
->handler_orig
= input_handler
;
764 input_handler
= gdb_readline_wrapper_line
;
766 cleanup
->already_prompted_orig
= rl_already_prompted
;
768 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
770 /* Display our prompt and prevent double prompt display. */
771 display_gdb_prompt (prompt
);
772 rl_already_prompted
= 1;
774 if (after_char_processing_hook
)
775 (*after_char_processing_hook
) ();
776 gdb_assert (after_char_processing_hook
== NULL
);
778 /* gdb_do_one_event argument is unused. */
779 while (gdb_do_one_event (NULL
) >= 0)
780 if (gdb_readline_wrapper_done
)
783 retval
= gdb_readline_wrapper_result
;
784 do_cleanups (back_to
);
793 #if STOP_SIGNAL == SIGTSTP
794 signal (SIGTSTP
, SIG_DFL
);
800 sigprocmask (SIG_SETMASK
, &zero
, 0);
802 #elif HAVE_SIGSETMASK
805 kill (getpid (), SIGTSTP
);
806 signal (SIGTSTP
, stop_sig
);
808 signal (STOP_SIGNAL
, stop_sig
);
810 printf_unfiltered ("%s", get_prompt ());
811 gdb_flush (gdb_stdout
);
813 /* Forget about any previous command -- null line now will do nothing. */
816 #endif /* STOP_SIGNAL */
818 /* Initialize signal handlers. */
820 float_handler (int signo
)
822 /* This message is based on ANSI C, section 4.7. Note that integer
823 divide by zero causes this, so "float" is a misnomer. */
824 signal (SIGFPE
, float_handler
);
825 error (_("Erroneous arithmetic operation."));
829 do_nothing (int signo
)
831 /* Under System V the default disposition of a signal is reinstated after
832 the signal is caught and delivered to an application process. On such
833 systems one must restore the replacement signal handler if one wishes
834 to continue handling the signal in one's program. On BSD systems this
835 is not needed but it is harmless, and it simplifies the code to just do
836 it unconditionally. */
837 signal (signo
, do_nothing
);
840 /* The current saved history number from operate-and-get-next.
841 This is -1 if not valid. */
842 static int operate_saved_history
= -1;
844 /* This is put on the appropriate hook and helps operate-and-get-next
847 gdb_rl_operate_and_get_next_completion (void)
849 int delta
= where_history () - operate_saved_history
;
850 /* The `key' argument to rl_get_previous_history is ignored. */
851 rl_get_previous_history (delta
, 0);
852 operate_saved_history
= -1;
854 /* readline doesn't automatically update the display for us. */
857 after_char_processing_hook
= NULL
;
858 rl_pre_input_hook
= NULL
;
861 /* This is a gdb-local readline command handler. It accepts the
862 current command line (like RET does) and, if this command was taken
863 from the history, arranges for the next command in the history to
864 appear on the command line when the prompt returns.
865 We ignore the arguments. */
867 gdb_rl_operate_and_get_next (int count
, int key
)
871 /* Use the async hook. */
872 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
874 /* Find the current line, and find the next line to use. */
875 where
= where_history();
877 /* FIXME: kettenis/20020817: max_input_history is renamed into
878 history_max_entries in readline-4.2. When we do a new readline
879 import, we should probably change it here too, even though
880 readline maintains backwards compatibility for now by still
881 defining max_input_history. */
882 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
883 (where
>= history_length
- 1))
884 operate_saved_history
= where
;
886 operate_saved_history
= where
+ 1;
888 return rl_newline (1, key
);
891 /* Read one line from the command input stream `instream'
892 into the local static buffer `linebuffer' (whose current length
894 The buffer is made bigger as necessary.
895 Returns the address of the start of the line.
897 NULL is returned for end of file.
899 *If* the instream == stdin & stdin is a terminal, the line read
900 is copied into the file line saver (global var char *line,
901 length linesize) so that it can be duplicated.
903 This routine either uses fancy command line editing or
904 simple input as the user has requested. */
907 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
909 static char *linebuffer
= 0;
910 static unsigned linelength
= 0;
914 char *local_prompt
= prompt_arg
;
918 /* The annotation suffix must be non-NULL. */
919 if (annotation_suffix
== NULL
)
920 annotation_suffix
= "";
922 if (annotation_level
> 1 && instream
== stdin
)
924 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
925 + strlen (annotation_suffix
) + 40);
926 if (prompt_arg
== NULL
)
927 local_prompt
[0] = '\0';
929 strcpy (local_prompt
, prompt_arg
);
930 strcat (local_prompt
, "\n\032\032");
931 strcat (local_prompt
, annotation_suffix
);
932 strcat (local_prompt
, "\n");
938 linebuffer
= (char *) xmalloc (linelength
);
943 /* Control-C quits instantly if typed while in this loop
944 since it should not wait until the user types a newline. */
948 signal (STOP_SIGNAL
, handle_stop_sig
);
953 /* Make sure that all output has been output. Some machines may let
954 you get away with leaving out some of the gdb_flush, but not all. */
956 gdb_flush (gdb_stdout
);
957 gdb_flush (gdb_stderr
);
959 if (source_file_name
!= NULL
)
960 ++source_line_number
;
962 if (annotation_level
> 1 && instream
== stdin
)
964 puts_unfiltered ("\n\032\032pre-");
965 puts_unfiltered (annotation_suffix
);
966 puts_unfiltered ("\n");
969 /* Don't use fancy stuff if not talking to stdin. */
970 if (deprecated_readline_hook
&& input_from_terminal_p ())
972 rl
= (*deprecated_readline_hook
) (local_prompt
);
974 else if (command_editing_p
&& input_from_terminal_p ())
976 rl
= gdb_readline_wrapper (local_prompt
);
980 rl
= gdb_readline (local_prompt
);
983 if (annotation_level
> 1 && instream
== stdin
)
985 puts_unfiltered ("\n\032\032post-");
986 puts_unfiltered (annotation_suffix
);
987 puts_unfiltered ("\n");
990 if (!rl
|| rl
== (char *) EOF
)
995 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
997 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
998 nline
= (char *) xrealloc (linebuffer
, linelength
);
999 p
+= nline
- linebuffer
;
1003 /* Copy line. Don't copy null at end. (Leaves line alone
1004 if this was just a newline) */
1008 xfree (rl
); /* Allocated in readline. */
1010 if (p
== linebuffer
|| *(p
- 1) != '\\')
1013 p
--; /* Put on top of '\'. */
1014 local_prompt
= (char *) 0;
1019 signal (STOP_SIGNAL
, SIG_DFL
);
1026 #define SERVER_COMMAND_LENGTH 7
1028 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1029 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1032 /* Note that we don't set `line'. Between this and the check in
1033 dont_repeat, this insures that repeating will still do the
1036 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1039 /* Do history expansion if that is wished. */
1040 if (history_expansion_p
&& instream
== stdin
1041 && ISATTY (instream
))
1043 char *history_value
;
1046 *p
= '\0'; /* Insert null now. */
1047 expanded
= history_expand (linebuffer
, &history_value
);
1050 /* Print the changes. */
1051 printf_unfiltered ("%s\n", history_value
);
1053 /* If there was an error, call this function again. */
1056 xfree (history_value
);
1057 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1059 if (strlen (history_value
) > linelength
)
1061 linelength
= strlen (history_value
) + 1;
1062 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1064 strcpy (linebuffer
, history_value
);
1065 p
= linebuffer
+ strlen (linebuffer
);
1067 xfree (history_value
);
1070 /* If we just got an empty line, and that is supposed
1071 to repeat the previous command, return the value in the
1073 if (repeat
&& p
== linebuffer
)
1075 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1081 /* Add line to history if appropriate. */
1082 if (instream
== stdin
1083 && ISATTY (stdin
) && *linebuffer
)
1084 add_history (linebuffer
);
1086 /* Note: lines consisting solely of comments are added to the command
1087 history. This is useful when you type a command, and then
1088 realize you don't want to execute it quite yet. You can comment
1089 out the command and then later fetch it from the value history
1090 and remove the '#'. The kill ring is probably better, but some
1091 people are in the habit of commenting things out. */
1093 *p1
= '\0'; /* Found a comment. */
1095 /* Save into global buffer if appropriate. */
1098 if (linelength
> linesize
)
1100 line
= xrealloc (line
, linelength
);
1101 linesize
= linelength
;
1103 strcpy (line
, linebuffer
);
1110 /* Print the GDB banner. */
1112 print_gdb_version (struct ui_file
*stream
)
1114 /* From GNU coding standards, first line is meant to be easy for a
1115 program to parse, and is just canonical program name and version
1116 number, which starts after last space. */
1118 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1120 /* Second line is a copyright notice. */
1122 fprintf_filtered (stream
, "Copyright (C) 2009 Free Software Foundation, Inc.\n");
1124 /* Following the copyright is a brief statement that the program is
1125 free software, that users are free to copy and change it on
1126 certain conditions, that it is covered by the GNU GPL, and that
1127 there is no warranty. */
1129 fprintf_filtered (stream
, "\
1130 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1131 This is free software: you are free to change and redistribute it.\n\
1132 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1133 and \"show warranty\" for details.\n");
1135 /* After the required info we print the configuration information. */
1137 fprintf_filtered (stream
, "This GDB was configured as \"");
1138 if (strcmp (host_name
, target_name
) != 0)
1140 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1144 fprintf_filtered (stream
, "%s", host_name
);
1146 fprintf_filtered (stream
, "\".");
1148 if (REPORT_BUGS_TO
[0])
1150 fprintf_filtered (stream
,
1151 _("\nFor bug reporting instructions, please see:\n"));
1152 fprintf_filtered (stream
, "%s.", REPORT_BUGS_TO
);
1156 /* get_prompt: access method for the GDB prompt string. */
1165 set_prompt (char *s
)
1167 /* ??rehrauer: I don't know why this fails, since it looks as though
1168 assignments to prompt are wrapped in calls to savestring...
1172 PROMPT (0) = savestring (s
, strlen (s
));
1176 /* If necessary, make the user confirm that we should quit. Return
1177 non-zero if we should quit, zero if we shouldn't. */
1182 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1185 struct inferior
*inf
= current_inferior ();
1187 /* This is something of a hack. But there's no reliable way to
1188 see if a GUI is running. The `use_windows' variable doesn't
1190 if (deprecated_init_ui_hook
)
1191 s
= "A debugging session is active.\nDo you still want to close the debugger?";
1192 else if (inf
->attach_flag
)
1193 s
= "The program is running. Quit anyway (and detach it)? ";
1195 s
= "The program is running. Quit anyway (and kill it)? ";
1197 if (!query ("%s", s
))
1210 /* Callback for iterate_over_threads. Finds any thread of inferior
1211 given by ARG (really an int*). */
1214 any_thread_of (struct thread_info
*thread
, void *arg
)
1216 int pid
= * (int *)arg
;
1218 if (PIDGET (thread
->ptid
) == pid
)
1224 /* Callback for iterate_over_inferiors. Kills or detaches the given
1225 inferior, depending on how we originally gained control of it. */
1228 kill_or_detach (struct inferior
*inf
, void *args
)
1230 struct qt_args
*qt
= args
;
1231 struct thread_info
*thread
;
1233 thread
= iterate_over_threads (any_thread_of
, &inf
->pid
);
1236 switch_to_thread (thread
->ptid
);
1237 if (inf
->attach_flag
)
1238 target_detach (qt
->args
, qt
->from_tty
);
1246 /* Helper routine for quit_force that requires error handling. */
1249 quit_target (void *arg
)
1251 struct qt_args
*qt
= (struct qt_args
*)arg
;
1253 /* Kill or detach all inferiors. */
1254 iterate_over_inferiors (kill_or_detach
, qt
);
1256 /* Give all pushed targets a chance to do minimal cleanup, and pop
1258 pop_all_targets (1);
1260 /* Save the history information if it is appropriate to do so. */
1261 if (write_history_p
&& history_filename
)
1262 write_history (history_filename
);
1264 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1269 /* Quit without asking for confirmation. */
1272 quit_force (char *args
, int from_tty
)
1277 /* An optional expression may be used to cause gdb to terminate with the
1278 value of that expression. */
1281 struct value
*val
= parse_and_eval (args
);
1283 exit_code
= (int) value_as_long (val
);
1285 else if (return_child_result
)
1286 exit_code
= return_child_result_value
;
1289 qt
.from_tty
= from_tty
;
1291 /* We want to handle any quit errors and exit regardless. */
1292 catch_errors (quit_target
, &qt
,
1293 "Quitting: ", RETURN_MASK_ALL
);
1298 /* Returns whether GDB is running on a terminal and input is
1299 currently coming from that terminal. */
1302 input_from_terminal_p (void)
1304 if (gdb_has_a_terminal () && instream
== stdin
)
1307 /* If INSTREAM is unset, and we are not in a user command, we
1308 must be in Insight. That's like having a terminal, for our
1310 if (instream
== NULL
&& !in_user_command
)
1317 dont_repeat_command (char *ignored
, int from_tty
)
1319 *line
= 0; /* Can't call dont_repeat here because we're not
1320 necessarily reading from stdin. */
1323 /* Functions to manipulate command line editing control variables. */
1325 /* Number of commands to print in each call to show_commands. */
1326 #define Hist_print 10
1328 show_commands (char *args
, int from_tty
)
1330 /* Index for history commands. Relative to history_base. */
1333 /* Number of the history entry which we are planning to display next.
1334 Relative to history_base. */
1337 /* The first command in the history which doesn't exist (i.e. one more
1338 than the number of the last command). Relative to history_base. */
1341 /* Print out some of the commands from the command history. */
1342 /* First determine the length of the history list. */
1343 hist_len
= history_size
;
1344 for (offset
= 0; offset
< history_size
; offset
++)
1346 if (!history_get (history_base
+ offset
))
1355 if (args
[0] == '+' && args
[1] == '\0')
1356 /* "info editing +" should print from the stored position. */
1359 /* "info editing <exp>" should print around command number <exp>. */
1360 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1362 /* "show commands" means print the last Hist_print commands. */
1365 num
= hist_len
- Hist_print
;
1371 /* If there are at least Hist_print commands, we want to display the last
1372 Hist_print rather than, say, the last 6. */
1373 if (hist_len
- num
< Hist_print
)
1375 num
= hist_len
- Hist_print
;
1380 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1382 printf_filtered ("%5d %s\n", history_base
+ offset
,
1383 (history_get (history_base
+ offset
))->line
);
1386 /* The next command we want to display is the next one that we haven't
1390 /* If the user repeats this command with return, it should do what
1391 "show commands +" does. This is unnecessary if arg is null,
1392 because "show commands +" is not useful after "show commands". */
1393 if (from_tty
&& args
)
1400 /* Called by do_setshow_command. */
1402 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1404 if (history_size
== INT_MAX
)
1405 unstifle_history ();
1406 else if (history_size
>= 0)
1407 stifle_history (history_size
);
1410 history_size
= INT_MAX
;
1411 error (_("History size must be non-negative"));
1416 set_history (char *args
, int from_tty
)
1418 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1419 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1423 show_history (char *args
, int from_tty
)
1425 cmd_show_list (showhistlist
, from_tty
, "");
1428 int info_verbose
= 0; /* Default verbose msgs off */
1430 /* Called by do_setshow_command. An elaborate joke. */
1432 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1434 char *cmdname
= "verbose";
1435 struct cmd_list_element
*showcmd
;
1437 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1441 c
->doc
= "Set verbose printing of informational messages.";
1442 showcmd
->doc
= "Show verbose printing of informational messages.";
1446 c
->doc
= "Set verbosity.";
1447 showcmd
->doc
= "Show verbosity.";
1451 /* Init the history buffer. Note that we are called after the init file(s)
1452 * have been read so that the user can change the history file via his
1453 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1454 * overrides all of this.
1462 tmpenv
= getenv ("HISTSIZE");
1464 history_size
= atoi (tmpenv
);
1465 else if (!history_size
)
1468 stifle_history (history_size
);
1470 tmpenv
= getenv ("GDBHISTFILE");
1472 history_filename
= savestring (tmpenv
, strlen (tmpenv
));
1473 else if (!history_filename
)
1475 /* We include the current directory so that if the user changes
1476 directories the file written will be the same as the one
1479 /* No leading dots in file names are allowed on MSDOS. */
1480 history_filename
= concat (current_directory
, "/_gdb_history",
1483 history_filename
= concat (current_directory
, "/.gdb_history",
1487 read_history (history_filename
);
1491 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1492 struct cmd_list_element
*c
, const char *value
)
1494 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1498 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1499 struct cmd_list_element
*c
, const char *value
)
1501 fprintf_filtered (file
, _("\
1502 Editing of command lines as they are typed is %s.\n"),
1507 show_annotation_level (struct ui_file
*file
, int from_tty
,
1508 struct cmd_list_element
*c
, const char *value
)
1510 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1514 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1515 struct cmd_list_element
*c
, const char *value
)
1517 fprintf_filtered (file
, _("\
1518 Notification of completion for asynchronous execution commands is %s.\n"),
1524 struct cmd_list_element
*c
;
1526 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1527 whatever the DEFAULT_PROMPT is. */
1528 the_prompts
.top
= 0;
1530 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1532 /* Set things up for annotation_level > 1, if the user ever decides
1534 async_annotation_suffix
= "prompt";
1535 /* Set the variable associated with the setshow prompt command. */
1536 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1538 /* If gdb was started with --annotate=2, this is equivalent to the
1539 user entering the command 'set annotate 2' at the gdb prompt, so
1540 we need to do extra processing. */
1541 if (annotation_level
> 1)
1542 set_async_annotation_level (NULL
, 0, NULL
);
1544 /* Set the important stuff up for command editing. */
1545 command_editing_p
= 1;
1546 history_expansion_p
= 0;
1547 write_history_p
= 0;
1549 /* Setup important stuff for command line editing. */
1550 rl_completion_entry_function
= readline_line_completion_function
;
1551 rl_completer_word_break_characters
= default_word_break_characters ();
1552 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1553 rl_readline_name
= "gdb";
1554 rl_terminal_name
= getenv ("TERM");
1556 /* The name for this defun comes from Bash, where it originated.
1557 15 is Control-o, the same binding this function has in Bash. */
1558 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1560 add_setshow_string_cmd ("prompt", class_support
,
1561 &new_async_prompt
, _("\
1562 Set gdb's prompt"), _("\
1563 Show gdb's prompt"), NULL
,
1565 show_new_async_prompt
,
1566 &setlist
, &showlist
);
1568 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1569 Don't repeat this command.\n\
1570 Primarily used inside of user-defined commands that should not be repeated when\n\
1573 add_setshow_boolean_cmd ("editing", class_support
,
1574 &async_command_editing_p
, _("\
1575 Set editing of command lines as they are typed."), _("\
1576 Show editing of command lines as they are typed."), _("\
1577 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1578 Without an argument, command line editing is enabled. To edit, use\n\
1579 EMACS-like or VI-like commands like control-P or ESC."),
1580 set_async_editing_command
,
1581 show_async_command_editing_p
,
1582 &setlist
, &showlist
);
1584 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1585 Set saving of the history record on exit."), _("\
1586 Show saving of the history record on exit."), _("\
1587 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1588 Without an argument, saving is enabled."),
1590 show_write_history_p
,
1591 &sethistlist
, &showhistlist
);
1593 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1594 Set the size of the command history,"), _("\
1595 Show the size of the command history,"), _("\
1596 ie. the number of previous commands to keep a record of."),
1597 set_history_size_command
,
1599 &sethistlist
, &showhistlist
);
1601 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1602 Set the filename in which to record the command history"), _("\
1603 Show the filename in which to record the command history"), _("\
1604 (the list of previous commands of which a record is kept)."),
1606 show_history_filename
,
1607 &sethistlist
, &showhistlist
);
1609 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1610 Set whether to confirm potentially dangerous operations."), _("\
1611 Show whether to confirm potentially dangerous operations."), NULL
,
1614 &setlist
, &showlist
);
1616 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1617 Set annotation_level."), _("\
1618 Show annotation_level."), _("\
1619 0 == normal; 1 == fullname (for use when running under emacs)\n\
1620 2 == output annotated suitably for use by programs that control GDB."),
1621 set_async_annotation_level
,
1622 show_annotation_level
,
1623 &setlist
, &showlist
);
1625 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1626 &exec_done_display_p
, _("\
1627 Set notification of completion for asynchronous execution commands."), _("\
1628 Show notification of completion for asynchronous execution commands."), _("\
1629 Use \"on\" to enable the notification, and \"off\" to disable it."),
1631 show_exec_done_display_p
,
1632 &setlist
, &showlist
);
1636 gdb_init (char *argv0
)
1638 if (pre_init_ui_hook
)
1639 pre_init_ui_hook ();
1641 /* Run the init function of each source file */
1644 /* Make sure we return to the original directory upon exit, come
1645 what may, since the OS doesn't do that for us. */
1646 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1649 init_cmd_lists (); /* This needs to be done first */
1650 initialize_targets (); /* Setup target_terminal macros for utils.c */
1651 initialize_utils (); /* Make errors and warnings possible */
1652 initialize_all_files ();
1653 initialize_current_architecture ();
1655 init_main (); /* But that omits this file! Do it now */
1657 initialize_stdin_serial ();
1659 async_init_signals ();
1661 /* We need a default language for parsing expressions, so simple things like
1662 "set width 0" won't fail if no language is explicitly set in a config file
1663 or implicitly set by reading an executable during startup. */
1664 set_language (language_c
);
1665 expected_language
= current_language
; /* don't warn about the change. */
1667 /* Allow another UI to initialize. If the UI fails to initialize,
1668 and it wants GDB to revert to the CLI, it should clear
1669 deprecated_init_ui_hook. */
1670 if (deprecated_init_ui_hook
)
1671 deprecated_init_ui_hook (argv0
);