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 /* Handler for SIGHUP. */
289 /* NOTE 1999-04-29: This function will be static again, once we modify
290 gdb to use the event loop as the default command loop and we merge
291 event-top.c into this file, top.c */
295 caution
= 0; /* Throw caution to the wind -- we're exiting.
296 This prevents asking the user dumb questions. */
297 quit_command ((char *) 0, 0);
300 #endif /* defined SIGHUP */
302 /* Line number we are currently in in a file which is being sourced. */
303 /* NOTE 1999-04-29: This variable will be static again, once we modify
304 gdb to use the event loop as the default command loop and we merge
305 event-top.c into this file, top.c */
306 /* static */ int source_line_number
;
308 /* Name of the file we are sourcing. */
309 /* NOTE 1999-04-29: This variable will be static again, once we modify
310 gdb to use the event loop as the default command loop and we merge
311 event-top.c into this file, top.c */
312 /* static */ char *source_file_name
;
314 /* Clean up on error during a "source" command (or execution of a
315 user-defined command). */
318 do_restore_instream_cleanup (void *stream
)
320 /* Restore the previous input stream. */
324 /* Read commands from STREAM. */
326 read_command_file (FILE *stream
)
328 struct cleanup
*cleanups
;
330 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
333 do_cleanups (cleanups
);
336 void (*pre_init_ui_hook
) (void);
340 do_chdir_cleanup (void *old_dir
)
347 /* Execute the line P as a command.
348 Pass FROM_TTY as second argument to the defining function. */
350 /* Execute command P, in the current user context. */
353 execute_command (char *p
, int from_tty
)
355 struct cmd_list_element
*c
;
357 static int warned
= 0;
359 long time_at_cmd_start
= 0;
361 long space_at_cmd_start
= 0;
363 extern int display_time
;
364 extern int display_space
;
366 if (target_can_async_p ())
368 time_at_cmd_start
= get_run_time ();
373 char *lim
= (char *) sbrk (0);
374 space_at_cmd_start
= lim
- lim_at_start
;
381 /* Force cleanup of any alloca areas if using C alloca instead of
385 /* This can happen when command_line_input hits end of file. */
389 target_log_command (p
);
391 while (*p
== ' ' || *p
== '\t')
398 /* If trace-commands is set then this will print this command. */
399 print_command_trace (p
);
401 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
403 /* Pass null arg rather than an empty one. */
406 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
407 while the is_complete_command(cfunc) test is just plain
408 bogus. They should both be replaced by a test of the form
409 c->strip_trailing_white_space_p. */
410 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
411 can't be replaced with func. This is because it is the
412 cfunc, and not the func, that has the value that the
413 is_complete_command hack is testing for. */
414 /* Clear off trailing whitespace, except for set and complete
417 && c
->type
!= set_cmd
418 && !is_complete_command (c
))
420 p
= arg
+ strlen (arg
) - 1;
421 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
426 /* If this command has been pre-hooked, run the hook first. */
427 execute_cmd_pre_hook (c
);
429 if (c
->flags
& DEPRECATED_WARN_USER
)
430 deprecated_cmd_warning (&line
);
432 if (c
->class == class_user
)
433 execute_user_command (c
, arg
);
434 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
435 do_setshow_command (arg
, from_tty
& caution
, c
);
436 else if (!cmd_func_p (c
))
437 error (_("That is not a command, just a help topic."));
438 else if (deprecated_call_command_hook
)
439 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
441 cmd_func (c
, arg
, from_tty
& caution
);
443 /* If this command has been post-hooked, run the hook last. */
444 execute_cmd_post_hook (c
);
448 /* Tell the user if the language has changed (except first time). */
449 if (current_language
!= expected_language
)
451 if (language_mode
== language_mode_auto
)
453 language_info (1); /* Print what changed. */
458 /* Warn the user if the working language does not match the
459 language of the current frame. Only warn the user if we are
460 actually running the program, i.e. there is a stack. */
461 /* FIXME: This should be cacheing the frame and only running when
462 the frame changes. */
464 if (has_stack_frames ())
466 flang
= get_frame_language ();
468 && flang
!= language_unknown
469 && flang
!= current_language
->la_language
)
471 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
477 /* Read commands from `instream' and execute them
478 until end of file or error reading instream. */
483 struct cleanup
*old_chain
;
485 int stdin_is_tty
= ISATTY (stdin
);
486 long time_at_cmd_start
;
488 long space_at_cmd_start
= 0;
490 extern int display_time
;
491 extern int display_space
;
493 while (instream
&& !feof (instream
))
495 if (window_hook
&& instream
== stdin
)
496 (*window_hook
) (instream
, get_prompt ());
499 if (instream
== stdin
&& stdin_is_tty
)
500 reinitialize_more_filter ();
501 old_chain
= make_cleanup (null_cleanup
, 0);
503 /* Get a command-line. This calls the readline package. */
504 command
= command_line_input (instream
== stdin
?
505 get_prompt () : (char *) NULL
,
506 instream
== stdin
, "prompt");
510 time_at_cmd_start
= get_run_time ();
515 char *lim
= (char *) sbrk (0);
516 space_at_cmd_start
= lim
- lim_at_start
;
520 execute_command (command
, instream
== stdin
);
522 /* Do any commands attached to breakpoint we are stopped at. */
523 bpstat_do_actions ();
525 do_cleanups (old_chain
);
529 long cmd_time
= get_run_time () - time_at_cmd_start
;
531 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
532 cmd_time
/ 1000000, cmd_time
% 1000000);
538 char *lim
= (char *) sbrk (0);
539 long space_now
= lim
- lim_at_start
;
540 long space_diff
= space_now
- space_at_cmd_start
;
542 printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"),
544 (space_diff
>= 0 ? "+" : ""),
551 /* Commands call this if they do not want to be repeated by null lines. */
559 /* If we aren't reading from standard input, we are saving the last
560 thing read from stdin in line and don't want to delete it. Null lines
561 won't repeat here in any case. */
562 if (instream
== stdin
)
566 /* Read a line from the stream "instream" without command line editing.
568 It prints PROMPT_ARG once at the start.
569 Action is compatible with "readline", e.g. space for the result is
570 malloc'd and should be freed by the caller.
572 A NULL return means end of file. */
574 gdb_readline (char *prompt_arg
)
579 int result_size
= 80;
583 /* Don't use a _filtered function here. It causes the assumed
584 character position to be off, since the newline we read from
585 the user is not accounted for. */
586 fputs_unfiltered (prompt_arg
, gdb_stdout
);
587 gdb_flush (gdb_stdout
);
590 result
= (char *) xmalloc (result_size
);
594 /* Read from stdin if we are executing a user defined command.
595 This is the right thing for prompt_for_continue, at least. */
596 c
= fgetc (instream
? instream
: stdin
);
601 /* The last line does not end with a newline. Return it, and
602 if we are called again fgetc will still return EOF and
603 we'll return NULL then. */
611 if (input_index
> 0 && result
[input_index
- 1] == '\r')
616 result
[input_index
++] = c
;
617 while (input_index
>= result_size
)
620 result
= (char *) xrealloc (result
, result_size
);
624 result
[input_index
++] = '\0';
628 /* Variables which control command line editing and history
629 substitution. These variables are given default values at the end
631 static int command_editing_p
;
633 /* NOTE 1999-04-29: This variable will be static again, once we modify
634 gdb to use the event loop as the default command loop and we merge
635 event-top.c into this file, top.c */
637 /* static */ int history_expansion_p
;
639 static int write_history_p
;
641 show_write_history_p (struct ui_file
*file
, int from_tty
,
642 struct cmd_list_element
*c
, const char *value
)
644 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
648 static int history_size
;
650 show_history_size (struct ui_file
*file
, int from_tty
,
651 struct cmd_list_element
*c
, const char *value
)
653 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
657 static char *history_filename
;
659 show_history_filename (struct ui_file
*file
, int from_tty
,
660 struct cmd_list_element
*c
, const char *value
)
662 fprintf_filtered (file
, _("\
663 The filename in which to record the command history is \"%s\".\n"),
667 /* This is like readline(), but it has some gdb-specific behavior.
668 gdb may want readline in both the synchronous and async modes during
669 a single gdb invocation. At the ordinary top-level prompt we might
670 be using the async readline. That means we can't use
671 rl_pre_input_hook, since it doesn't work properly in async mode.
672 However, for a secondary prompt (" >", such as occurs during a
673 `define'), gdb wants a synchronous response.
675 We used to call readline() directly, running it in synchronous
676 mode. But mixing modes this way is not supported, and as of
677 readline 5.x it no longer works; the arrow keys come unbound during
678 the synchronous call. So we make a nested call into the event
679 loop. That's what gdb_readline_wrapper is for. */
681 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
682 rely on gdb_readline_wrapper_result, which might still be NULL if
683 the user types Control-D for EOF. */
684 static int gdb_readline_wrapper_done
;
686 /* The result of the current call to gdb_readline_wrapper, once a newline
688 static char *gdb_readline_wrapper_result
;
690 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
691 to be called after the newline is processed (which will redisplay
692 the prompt). But in gdb_readline_wrapper we will not get a new
693 prompt until the next call, or until we return to the event loop.
694 So we disable this hook around the newline and restore it before we
696 static void (*saved_after_char_processing_hook
) (void);
698 /* This function is called when readline has seen a complete line of
702 gdb_readline_wrapper_line (char *line
)
704 gdb_assert (!gdb_readline_wrapper_done
);
705 gdb_readline_wrapper_result
= line
;
706 gdb_readline_wrapper_done
= 1;
708 /* Prevent operate-and-get-next from acting too early. */
709 saved_after_char_processing_hook
= after_char_processing_hook
;
710 after_char_processing_hook
= NULL
;
712 /* Prevent parts of the prompt from being redisplayed if annotations
713 are enabled, and readline's state getting out of sync. */
714 if (async_command_editing_p
)
715 rl_callback_handler_remove ();
718 struct gdb_readline_wrapper_cleanup
720 void (*handler_orig
) (char *);
721 int already_prompted_orig
;
725 gdb_readline_wrapper_cleanup (void *arg
)
727 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
729 rl_already_prompted
= cleanup
->already_prompted_orig
;
731 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
732 input_handler
= cleanup
->handler_orig
;
733 gdb_readline_wrapper_result
= NULL
;
734 gdb_readline_wrapper_done
= 0;
736 after_char_processing_hook
= saved_after_char_processing_hook
;
737 saved_after_char_processing_hook
= NULL
;
743 gdb_readline_wrapper (char *prompt
)
745 struct cleanup
*back_to
;
746 struct gdb_readline_wrapper_cleanup
*cleanup
;
749 cleanup
= xmalloc (sizeof (*cleanup
));
750 cleanup
->handler_orig
= input_handler
;
751 input_handler
= gdb_readline_wrapper_line
;
753 cleanup
->already_prompted_orig
= rl_already_prompted
;
755 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
757 /* Display our prompt and prevent double prompt display. */
758 display_gdb_prompt (prompt
);
759 rl_already_prompted
= 1;
761 if (after_char_processing_hook
)
762 (*after_char_processing_hook
) ();
763 gdb_assert (after_char_processing_hook
== NULL
);
765 /* gdb_do_one_event argument is unused. */
766 while (gdb_do_one_event (NULL
) >= 0)
767 if (gdb_readline_wrapper_done
)
770 retval
= gdb_readline_wrapper_result
;
771 do_cleanups (back_to
);
780 #if STOP_SIGNAL == SIGTSTP
781 signal (SIGTSTP
, SIG_DFL
);
787 sigprocmask (SIG_SETMASK
, &zero
, 0);
789 #elif HAVE_SIGSETMASK
792 kill (getpid (), SIGTSTP
);
793 signal (SIGTSTP
, stop_sig
);
795 signal (STOP_SIGNAL
, stop_sig
);
797 printf_unfiltered ("%s", get_prompt ());
798 gdb_flush (gdb_stdout
);
800 /* Forget about any previous command -- null line now will do nothing. */
803 #endif /* STOP_SIGNAL */
805 /* Initialize signal handlers. */
807 float_handler (int signo
)
809 /* This message is based on ANSI C, section 4.7. Note that integer
810 divide by zero causes this, so "float" is a misnomer. */
811 signal (SIGFPE
, float_handler
);
812 error (_("Erroneous arithmetic operation."));
816 do_nothing (int signo
)
818 /* Under System V the default disposition of a signal is reinstated after
819 the signal is caught and delivered to an application process. On such
820 systems one must restore the replacement signal handler if one wishes
821 to continue handling the signal in one's program. On BSD systems this
822 is not needed but it is harmless, and it simplifies the code to just do
823 it unconditionally. */
824 signal (signo
, do_nothing
);
827 /* The current saved history number from operate-and-get-next.
828 This is -1 if not valid. */
829 static int operate_saved_history
= -1;
831 /* This is put on the appropriate hook and helps operate-and-get-next
834 gdb_rl_operate_and_get_next_completion (void)
836 int delta
= where_history () - operate_saved_history
;
837 /* The `key' argument to rl_get_previous_history is ignored. */
838 rl_get_previous_history (delta
, 0);
839 operate_saved_history
= -1;
841 /* readline doesn't automatically update the display for us. */
844 after_char_processing_hook
= NULL
;
845 rl_pre_input_hook
= NULL
;
848 /* This is a gdb-local readline command handler. It accepts the
849 current command line (like RET does) and, if this command was taken
850 from the history, arranges for the next command in the history to
851 appear on the command line when the prompt returns.
852 We ignore the arguments. */
854 gdb_rl_operate_and_get_next (int count
, int key
)
858 /* Use the async hook. */
859 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
861 /* Find the current line, and find the next line to use. */
862 where
= where_history();
864 /* FIXME: kettenis/20020817: max_input_history is renamed into
865 history_max_entries in readline-4.2. When we do a new readline
866 import, we should probably change it here too, even though
867 readline maintains backwards compatibility for now by still
868 defining max_input_history. */
869 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
870 (where
>= history_length
- 1))
871 operate_saved_history
= where
;
873 operate_saved_history
= where
+ 1;
875 return rl_newline (1, key
);
878 /* Read one line from the command input stream `instream'
879 into the local static buffer `linebuffer' (whose current length
881 The buffer is made bigger as necessary.
882 Returns the address of the start of the line.
884 NULL is returned for end of file.
886 *If* the instream == stdin & stdin is a terminal, the line read
887 is copied into the file line saver (global var char *line,
888 length linesize) so that it can be duplicated.
890 This routine either uses fancy command line editing or
891 simple input as the user has requested. */
894 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
896 static char *linebuffer
= 0;
897 static unsigned linelength
= 0;
901 char *local_prompt
= prompt_arg
;
905 /* The annotation suffix must be non-NULL. */
906 if (annotation_suffix
== NULL
)
907 annotation_suffix
= "";
909 if (annotation_level
> 1 && instream
== stdin
)
911 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
912 + strlen (annotation_suffix
) + 40);
913 if (prompt_arg
== NULL
)
914 local_prompt
[0] = '\0';
916 strcpy (local_prompt
, prompt_arg
);
917 strcat (local_prompt
, "\n\032\032");
918 strcat (local_prompt
, annotation_suffix
);
919 strcat (local_prompt
, "\n");
925 linebuffer
= (char *) xmalloc (linelength
);
930 /* Control-C quits instantly if typed while in this loop
931 since it should not wait until the user types a newline. */
935 signal (STOP_SIGNAL
, handle_stop_sig
);
940 /* Make sure that all output has been output. Some machines may let
941 you get away with leaving out some of the gdb_flush, but not all. */
943 gdb_flush (gdb_stdout
);
944 gdb_flush (gdb_stderr
);
946 if (source_file_name
!= NULL
)
947 ++source_line_number
;
949 if (annotation_level
> 1 && instream
== stdin
)
951 puts_unfiltered ("\n\032\032pre-");
952 puts_unfiltered (annotation_suffix
);
953 puts_unfiltered ("\n");
956 /* Don't use fancy stuff if not talking to stdin. */
957 if (deprecated_readline_hook
&& input_from_terminal_p ())
959 rl
= (*deprecated_readline_hook
) (local_prompt
);
961 else if (command_editing_p
&& input_from_terminal_p ())
963 rl
= gdb_readline_wrapper (local_prompt
);
967 rl
= gdb_readline (local_prompt
);
970 if (annotation_level
> 1 && instream
== stdin
)
972 puts_unfiltered ("\n\032\032post-");
973 puts_unfiltered (annotation_suffix
);
974 puts_unfiltered ("\n");
977 if (!rl
|| rl
== (char *) EOF
)
982 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
984 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
985 nline
= (char *) xrealloc (linebuffer
, linelength
);
986 p
+= nline
- linebuffer
;
990 /* Copy line. Don't copy null at end. (Leaves line alone
991 if this was just a newline) */
995 xfree (rl
); /* Allocated in readline. */
997 if (p
== linebuffer
|| *(p
- 1) != '\\')
1000 p
--; /* Put on top of '\'. */
1001 local_prompt
= (char *) 0;
1006 signal (STOP_SIGNAL
, SIG_DFL
);
1013 #define SERVER_COMMAND_LENGTH 7
1015 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1016 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1019 /* Note that we don't set `line'. Between this and the check in
1020 dont_repeat, this insures that repeating will still do the
1023 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1026 /* Do history expansion if that is wished. */
1027 if (history_expansion_p
&& instream
== stdin
1028 && ISATTY (instream
))
1030 char *history_value
;
1033 *p
= '\0'; /* Insert null now. */
1034 expanded
= history_expand (linebuffer
, &history_value
);
1037 /* Print the changes. */
1038 printf_unfiltered ("%s\n", history_value
);
1040 /* If there was an error, call this function again. */
1043 xfree (history_value
);
1044 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1046 if (strlen (history_value
) > linelength
)
1048 linelength
= strlen (history_value
) + 1;
1049 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1051 strcpy (linebuffer
, history_value
);
1052 p
= linebuffer
+ strlen (linebuffer
);
1054 xfree (history_value
);
1057 /* If we just got an empty line, and that is supposed
1058 to repeat the previous command, return the value in the
1060 if (repeat
&& p
== linebuffer
)
1062 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1068 /* Add line to history if appropriate. */
1069 if (instream
== stdin
1070 && ISATTY (stdin
) && *linebuffer
)
1071 add_history (linebuffer
);
1073 /* Note: lines consisting solely of comments are added to the command
1074 history. This is useful when you type a command, and then
1075 realize you don't want to execute it quite yet. You can comment
1076 out the command and then later fetch it from the value history
1077 and remove the '#'. The kill ring is probably better, but some
1078 people are in the habit of commenting things out. */
1080 *p1
= '\0'; /* Found a comment. */
1082 /* Save into global buffer if appropriate. */
1085 if (linelength
> linesize
)
1087 line
= xrealloc (line
, linelength
);
1088 linesize
= linelength
;
1090 strcpy (line
, linebuffer
);
1097 /* Print the GDB banner. */
1099 print_gdb_version (struct ui_file
*stream
)
1101 /* From GNU coding standards, first line is meant to be easy for a
1102 program to parse, and is just canonical program name and version
1103 number, which starts after last space. */
1105 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1107 /* Second line is a copyright notice. */
1109 fprintf_filtered (stream
, "Copyright (C) 2009 Free Software Foundation, Inc.\n");
1111 /* Following the copyright is a brief statement that the program is
1112 free software, that users are free to copy and change it on
1113 certain conditions, that it is covered by the GNU GPL, and that
1114 there is no warranty. */
1116 fprintf_filtered (stream
, "\
1117 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1118 This is free software: you are free to change and redistribute it.\n\
1119 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1120 and \"show warranty\" for details.\n");
1122 /* After the required info we print the configuration information. */
1124 fprintf_filtered (stream
, "This GDB was configured as \"");
1125 if (strcmp (host_name
, target_name
) != 0)
1127 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1131 fprintf_filtered (stream
, "%s", host_name
);
1133 fprintf_filtered (stream
, "\".");
1135 if (REPORT_BUGS_TO
[0])
1137 fprintf_filtered (stream
,
1138 _("\nFor bug reporting instructions, please see:\n"));
1139 fprintf_filtered (stream
, "%s.", REPORT_BUGS_TO
);
1143 /* get_prompt: access method for the GDB prompt string. */
1152 set_prompt (char *s
)
1154 /* ??rehrauer: I don't know why this fails, since it looks as though
1155 assignments to prompt are wrapped in calls to savestring...
1159 PROMPT (0) = savestring (s
, strlen (s
));
1163 /* If necessary, make the user confirm that we should quit. Return
1164 non-zero if we should quit, zero if we shouldn't. */
1169 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1172 struct inferior
*inf
= current_inferior ();
1174 /* This is something of a hack. But there's no reliable way to
1175 see if a GUI is running. The `use_windows' variable doesn't
1177 if (deprecated_init_ui_hook
)
1178 s
= _("A debugging session is active.\nDo you still want to close the debugger?");
1179 else if (inf
->attach_flag
)
1180 s
= _("The program is running. Quit anyway (and detach it)? ");
1182 s
= _("The program is running. Quit anyway (and kill it)? ");
1184 if (!query ("%s", s
))
1197 /* Callback for iterate_over_threads. Finds any thread of inferior
1198 given by ARG (really an int*). */
1201 any_thread_of (struct thread_info
*thread
, void *arg
)
1203 int pid
= * (int *)arg
;
1205 if (PIDGET (thread
->ptid
) == pid
)
1211 /* Callback for iterate_over_inferiors. Kills or detaches the given
1212 inferior, depending on how we originally gained control of it. */
1215 kill_or_detach (struct inferior
*inf
, void *args
)
1217 struct qt_args
*qt
= args
;
1218 struct thread_info
*thread
;
1220 thread
= iterate_over_threads (any_thread_of
, &inf
->pid
);
1223 switch_to_thread (thread
->ptid
);
1224 if (inf
->attach_flag
)
1225 target_detach (qt
->args
, qt
->from_tty
);
1233 /* Helper routine for quit_force that requires error handling. */
1236 quit_target (void *arg
)
1238 struct qt_args
*qt
= (struct qt_args
*)arg
;
1240 /* Kill or detach all inferiors. */
1241 if (target_has_execution
)
1242 iterate_over_inferiors (kill_or_detach
, qt
);
1244 /* Give all pushed targets a chance to do minimal cleanup, and pop
1246 pop_all_targets (1);
1248 /* Save the history information if it is appropriate to do so. */
1249 if (write_history_p
&& history_filename
)
1250 write_history (history_filename
);
1252 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1257 /* Quit without asking for confirmation. */
1260 quit_force (char *args
, int from_tty
)
1265 /* An optional expression may be used to cause gdb to terminate with the
1266 value of that expression. */
1269 struct value
*val
= parse_and_eval (args
);
1271 exit_code
= (int) value_as_long (val
);
1273 else if (return_child_result
)
1274 exit_code
= return_child_result_value
;
1277 qt
.from_tty
= from_tty
;
1279 /* We want to handle any quit errors and exit regardless. */
1280 catch_errors (quit_target
, &qt
,
1281 "Quitting: ", RETURN_MASK_ALL
);
1286 /* Returns whether GDB is running on a terminal and input is
1287 currently coming from that terminal. */
1290 input_from_terminal_p (void)
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
= savestring (tmpenv
, strlen (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 struct cmd_list_element
*c
;
1514 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1515 whatever the DEFAULT_PROMPT is. */
1516 the_prompts
.top
= 0;
1518 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1520 /* Set things up for annotation_level > 1, if the user ever decides
1522 async_annotation_suffix
= "prompt";
1523 /* Set the variable associated with the setshow prompt command. */
1524 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1526 /* If gdb was started with --annotate=2, this is equivalent to the
1527 user entering the command 'set annotate 2' at the gdb prompt, so
1528 we need to do extra processing. */
1529 if (annotation_level
> 1)
1530 set_async_annotation_level (NULL
, 0, NULL
);
1532 /* Set the important stuff up for command editing. */
1533 command_editing_p
= 1;
1534 history_expansion_p
= 0;
1535 write_history_p
= 0;
1537 /* Setup important stuff for command line editing. */
1538 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1539 rl_completion_entry_function
= readline_line_completion_function
;
1540 rl_completer_word_break_characters
= default_word_break_characters ();
1541 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1542 rl_readline_name
= "gdb";
1543 rl_terminal_name
= getenv ("TERM");
1545 /* The name for this defun comes from Bash, where it originated.
1546 15 is Control-o, the same binding this function has in Bash. */
1547 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1549 add_setshow_string_cmd ("prompt", class_support
,
1550 &new_async_prompt
, _("\
1551 Set gdb's prompt"), _("\
1552 Show gdb's prompt"), NULL
,
1554 show_new_async_prompt
,
1555 &setlist
, &showlist
);
1557 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1558 Don't repeat this command.\n\
1559 Primarily used inside of user-defined commands that should not be repeated when\n\
1562 add_setshow_boolean_cmd ("editing", class_support
,
1563 &async_command_editing_p
, _("\
1564 Set editing of command lines as they are typed."), _("\
1565 Show editing of command lines as they are typed."), _("\
1566 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1567 Without an argument, command line editing is enabled. To edit, use\n\
1568 EMACS-like or VI-like commands like control-P or ESC."),
1569 set_async_editing_command
,
1570 show_async_command_editing_p
,
1571 &setlist
, &showlist
);
1573 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1574 Set saving of the history record on exit."), _("\
1575 Show saving of the history record on exit."), _("\
1576 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1577 Without an argument, saving is enabled."),
1579 show_write_history_p
,
1580 &sethistlist
, &showhistlist
);
1582 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1583 Set the size of the command history,"), _("\
1584 Show the size of the command history,"), _("\
1585 ie. the number of previous commands to keep a record of."),
1586 set_history_size_command
,
1588 &sethistlist
, &showhistlist
);
1590 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1591 Set the filename in which to record the command history"), _("\
1592 Show the filename in which to record the command history"), _("\
1593 (the list of previous commands of which a record is kept)."),
1595 show_history_filename
,
1596 &sethistlist
, &showhistlist
);
1598 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1599 Set whether to confirm potentially dangerous operations."), _("\
1600 Show whether to confirm potentially dangerous operations."), NULL
,
1603 &setlist
, &showlist
);
1605 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1606 Set annotation_level."), _("\
1607 Show annotation_level."), _("\
1608 0 == normal; 1 == fullname (for use when running under emacs)\n\
1609 2 == output annotated suitably for use by programs that control GDB."),
1610 set_async_annotation_level
,
1611 show_annotation_level
,
1612 &setlist
, &showlist
);
1614 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1615 &exec_done_display_p
, _("\
1616 Set notification of completion for asynchronous execution commands."), _("\
1617 Show notification of completion for asynchronous execution commands."), _("\
1618 Use \"on\" to enable the notification, and \"off\" to disable it."),
1620 show_exec_done_display_p
,
1621 &setlist
, &showlist
);
1623 add_setshow_filename_cmd ("data-directory", class_maintenance
,
1624 &gdb_datadir
, _("Set GDB's data directory."),
1625 _("Show GDB's data directory."),
1627 When set, GDB uses the specified path to search for data files."),
1634 gdb_init (char *argv0
)
1636 if (pre_init_ui_hook
)
1637 pre_init_ui_hook ();
1639 /* Run the init function of each source file */
1642 /* Make sure we return to the original directory upon exit, come
1643 what may, since the OS doesn't do that for us. */
1644 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1647 init_cmd_lists (); /* This needs to be done first */
1648 initialize_targets (); /* Setup target_terminal macros for utils.c */
1649 initialize_utils (); /* Make errors and warnings possible */
1650 initialize_all_files ();
1651 initialize_current_architecture ();
1653 init_main (); /* But that omits this file! Do it now */
1655 initialize_stdin_serial ();
1657 async_init_signals ();
1659 /* We need a default language for parsing expressions, so simple things like
1660 "set width 0" won't fail if no language is explicitly set in a config file
1661 or implicitly set by reading an executable during startup. */
1662 set_language (language_c
);
1663 expected_language
= current_language
; /* don't warn about the change. */
1665 /* Allow another UI to initialize. If the UI fails to initialize,
1666 and it wants GDB to revert to the CLI, it should clear
1667 deprecated_init_ui_hook. */
1668 if (deprecated_init_ui_hook
)
1669 deprecated_init_ui_hook (argv0
);