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 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 2 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, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
26 #include "call-cmds.h"
27 #include "cli/cli-cmds.h"
28 #include "cli/cli-script.h"
29 #include "cli/cli-setshow.h"
30 #include "cli/cli-decode.h"
33 #include "exceptions.h"
36 #include "breakpoint.h"
38 #include "expression.h"
41 #include "terminal.h" /* For job_control. */
43 #include "completer.h"
48 #include "gdb_assert.h"
50 #include "event-loop.h"
52 /* readline include files */
53 #include "readline/readline.h"
54 #include "readline/history.h"
56 /* readline defines this. */
59 #include <sys/types.h>
61 #include "event-top.h"
62 #include "gdb_string.h"
68 /* Default command line prompt. This is overriden in some configs. */
70 #ifndef DEFAULT_PROMPT
71 #define DEFAULT_PROMPT "(gdb) "
74 /* Initialization file name for gdb. This is overridden in some configs. */
78 # define PATH_MAX FILENAME_MAX
84 #ifndef GDBINIT_FILENAME
85 #define GDBINIT_FILENAME ".gdbinit"
87 char gdbinit
[PATH_MAX
+ 1] = GDBINIT_FILENAME
;
89 int inhibit_gdbinit
= 0;
91 /* If nonzero, and GDB has been configured to be able to use windows,
92 attempt to open them upon startup. */
96 extern char lang_frame_mismatch_warn
[]; /* language.c */
98 /* Flag for whether we want all the "from_tty" gubbish printed. */
100 int caution
= 1; /* Default is yes, sigh. */
102 show_caution (struct ui_file
*file
, int from_tty
,
103 struct cmd_list_element
*c
, const char *value
)
105 fprintf_filtered (file
, _("\
106 Whether to confirm potentially dangerous operations is %s.\n"),
110 /* stdio stream that command input is being read from. Set to stdin normally.
111 Set by source_command to the file we are sourcing. Set to NULL if we are
112 executing a user-defined command or interacting via a GUI. */
116 /* Flag to indicate whether a user defined command is currently running. */
120 /* Current working directory. */
122 char *current_directory
;
124 /* The directory name is actually stored here (usually). */
125 char gdb_dirbuf
[1024];
127 /* Function to call before reading a command, if nonzero.
128 The function receives two args: an input stream,
129 and a prompt string. */
131 void (*window_hook
) (FILE *, char *);
136 /* gdb prints this when reading a command interactively */
137 static char *gdb_prompt_string
; /* the global prompt string */
139 /* Buffer used for reading command lines, and the size
140 allocated for it so far. */
145 /* Nonzero if the current command is modified by "server ". This
146 affects things like recording into the command history, commands
147 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
148 whatever) can issue its own commands and also send along commands
149 from the user, and have the user not notice that the user interface
150 is issuing commands too. */
153 /* Baud rate specified for talking to serial target systems. Default
154 is left as -1, so targets can choose their own defaults. */
155 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
156 or (unsigned int)-1. This is a Bad User Interface. */
160 /* Timeout limit for response from target. */
162 /* The default value has been changed many times over the years. It
163 was originally 5 seconds. But that was thought to be a long time
164 to sit and wait, so it was changed to 2 seconds. That was thought
165 to be plenty unless the connection was going through some terminal
166 server or multiplexer or other form of hairy serial connection.
168 In mid-1996, remote_timeout was moved from remote.c to top.c and
169 it began being used in other remote-* targets. It appears that the
170 default was changed to 20 seconds at that time, perhaps because the
171 Renesas E7000 ICE didn't always respond in a timely manner.
173 But if 5 seconds is a long time to sit and wait for retransmissions,
174 20 seconds is far worse. This demonstrates the difficulty of using
175 a single variable for all protocol timeouts.
177 As remote.c is used much more than remote-e7000.c, it was changed
178 back to 2 seconds in 1999. */
180 int remote_timeout
= 2;
182 /* Non-zero tells remote* modules to output debugging info. */
184 int remote_debug
= 0;
186 /* Non-zero means the target is running. Note: this is different from
187 saying that there is an active target and we are stopped at a
188 breakpoint, for instance. This is a real indicator whether the
189 target is off and running, which gdb is doing something else. */
190 int target_executing
= 0;
192 /* Sbrk location on entry to main. Used for statistics only. */
197 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
201 #define STOP_SIGNAL SIGTSTP
202 static void stop_sig (int);
206 /* Hooks for alternate command interfaces. */
208 /* Called after most modules have been initialized, but before taking users
211 If the UI fails to initialize and it wants GDB to continue
212 using the default UI, then it should clear this hook before returning. */
214 void (*deprecated_init_ui_hook
) (char *argv0
);
216 /* This hook is called from within gdb's many mini-event loops which could
217 steal control from a real user interface's event loop. It returns
218 non-zero if the user is requesting a detach, zero otherwise. */
220 int (*deprecated_ui_loop_hook
) (int);
222 /* Called instead of command_loop at top level. Can be invoked via
223 throw_exception(). */
225 void (*deprecated_command_loop_hook
) (void);
228 /* Called from print_frame_info to list the line we stopped in. */
230 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
, int line
,
231 int stopline
, int noerror
);
232 /* Replaces most of query. */
234 int (*deprecated_query_hook
) (const char *, va_list);
236 /* Replaces most of warning. */
238 void (*deprecated_warning_hook
) (const char *, va_list);
240 /* These three functions support getting lines of text from the user.
241 They are used in sequence. First deprecated_readline_begin_hook is
242 called with a text string that might be (for example) a message for
243 the user to type in a sequence of commands to be executed at a
244 breakpoint. If this function calls back to a GUI, it might take
245 this opportunity to pop up a text interaction window with this
246 message. Next, deprecated_readline_hook is called with a prompt
247 that is emitted prior to collecting the user input. It can be
248 called multiple times. Finally, deprecated_readline_end_hook is
249 called to notify the GUI that we are done with the interaction
250 window and it can close it. */
252 void (*deprecated_readline_begin_hook
) (char *, ...);
253 char *(*deprecated_readline_hook
) (char *);
254 void (*deprecated_readline_end_hook
) (void);
256 /* Called as appropriate to notify the interface of the specified breakpoint
259 void (*deprecated_create_breakpoint_hook
) (struct breakpoint
* bpt
);
260 void (*deprecated_delete_breakpoint_hook
) (struct breakpoint
* bpt
);
261 void (*deprecated_modify_breakpoint_hook
) (struct breakpoint
* bpt
);
263 /* Called as appropriate to notify the interface that we have attached
264 to or detached from an already running process. */
266 void (*deprecated_attach_hook
) (void);
267 void (*deprecated_detach_hook
) (void);
269 /* Called during long calculations to allow GUI to repair window damage, and to
270 check for stop buttons, etc... */
272 void (*deprecated_interactive_hook
) (void);
274 /* Tell the GUI someone changed the register REGNO. -1 means
275 that the caller does not know which register changed or
276 that several registers have changed (see value_assign). */
277 void (*deprecated_register_changed_hook
) (int regno
);
279 /* Tell the GUI someone changed LEN bytes of memory at ADDR */
280 void (*deprecated_memory_changed_hook
) (CORE_ADDR addr
, int len
);
282 /* Called when going to wait for the target. Usually allows the GUI to run
283 while waiting for target events. */
285 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
286 struct target_waitstatus
* status
);
288 /* Used by UI as a wrapper around command execution. May do various things
289 like enabling/disabling buttons, etc... */
291 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
, char *cmd
,
294 /* Called after a `set' command has finished. Is only run if the
295 `set' command succeeded. */
297 void (*deprecated_set_hook
) (struct cmd_list_element
* c
);
299 /* Called when the current thread changes. Argument is thread id. */
301 void (*deprecated_context_hook
) (int id
);
303 /* Takes control from error (). Typically used to prevent longjmps out of the
304 middle of the GUI. Usually used in conjunction with a catch routine. */
306 void (*deprecated_error_hook
) (void);
308 /* Handler for SIGHUP. */
311 /* NOTE 1999-04-29: This function will be static again, once we modify
312 gdb to use the event loop as the default command loop and we merge
313 event-top.c into this file, top.c */
317 caution
= 0; /* Throw caution to the wind -- we're exiting.
318 This prevents asking the user dumb questions. */
319 quit_command ((char *) 0, 0);
322 #endif /* defined SIGHUP */
324 /* Line number we are currently in in a file which is being sourced. */
325 /* NOTE 1999-04-29: This variable will be static again, once we modify
326 gdb to use the event loop as the default command loop and we merge
327 event-top.c into this file, top.c */
328 /* static */ int source_line_number
;
330 /* Name of the file we are sourcing. */
331 /* NOTE 1999-04-29: This variable will be static again, once we modify
332 gdb to use the event loop as the default command loop and we merge
333 event-top.c into this file, top.c */
334 /* static */ char *source_file_name
;
336 /* Clean up on error during a "source" command (or execution of a
337 user-defined command). */
340 do_restore_instream_cleanup (void *stream
)
342 /* Restore the previous input stream. */
346 /* Read commands from STREAM. */
348 read_command_file (FILE *stream
)
350 struct cleanup
*cleanups
;
352 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
355 do_cleanups (cleanups
);
358 void (*pre_init_ui_hook
) (void);
362 do_chdir_cleanup (void *old_dir
)
369 /* Execute the line P as a command.
370 Pass FROM_TTY as second argument to the defining function. */
373 execute_command (char *p
, int from_tty
)
375 struct cmd_list_element
*c
;
377 static int warned
= 0;
382 /* Force cleanup of any alloca areas if using C alloca instead of
386 /* This can happen when command_line_input hits end of file. */
390 serial_log_command (p
);
392 while (*p
== ' ' || *p
== '\t')
399 /* If trace-commands is set then this will print this command. */
400 print_command_trace (p
);
402 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
404 /* If the target is running, we allow only a limited set of
406 if (target_can_async_p () && target_executing
)
407 if (strcmp (c
->name
, "help") != 0
408 && strcmp (c
->name
, "pwd") != 0
409 && strcmp (c
->name
, "show") != 0
410 && strcmp (c
->name
, "stop") != 0)
411 error (_("Cannot execute this command while the target is running."));
413 /* Pass null arg rather than an empty one. */
416 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
417 while the is_complete_command(cfunc) test is just plain
418 bogus. They should both be replaced by a test of the form
419 c->strip_trailing_white_space_p. */
420 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
421 can't be replaced with func. This is because it is the
422 cfunc, and not the func, that has the value that the
423 is_complete_command hack is testing for. */
424 /* Clear off trailing whitespace, except for set and complete
427 && c
->type
!= set_cmd
428 && !is_complete_command (c
))
430 p
= arg
+ strlen (arg
) - 1;
431 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
436 /* If this command has been pre-hooked, run the hook first. */
437 execute_cmd_pre_hook (c
);
439 if (c
->flags
& DEPRECATED_WARN_USER
)
440 deprecated_cmd_warning (&line
);
442 if (c
->class == class_user
)
443 execute_user_command (c
, arg
);
444 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
445 do_setshow_command (arg
, from_tty
& caution
, c
);
446 else if (!cmd_func_p (c
))
447 error (_("That is not a command, just a help topic."));
448 else if (deprecated_call_command_hook
)
449 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
451 cmd_func (c
, arg
, from_tty
& caution
);
453 /* If this command has been post-hooked, run the hook last. */
454 execute_cmd_post_hook (c
);
458 /* Tell the user if the language has changed (except first time). */
459 if (current_language
!= expected_language
)
461 if (language_mode
== language_mode_auto
)
463 language_info (1); /* Print what changed. */
468 /* Warn the user if the working language does not match the
469 language of the current frame. Only warn the user if we are
470 actually running the program, i.e. there is a stack. */
471 /* FIXME: This should be cacheing the frame and only running when
472 the frame changes. */
474 if (target_has_stack
)
476 flang
= get_frame_language ();
478 && flang
!= language_unknown
479 && flang
!= current_language
->la_language
)
481 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
487 /* Read commands from `instream' and execute them
488 until end of file or error reading instream. */
493 struct cleanup
*old_chain
;
495 int stdin_is_tty
= ISATTY (stdin
);
496 long time_at_cmd_start
;
498 long space_at_cmd_start
= 0;
500 extern int display_time
;
501 extern int display_space
;
503 while (instream
&& !feof (instream
))
505 if (window_hook
&& instream
== stdin
)
506 (*window_hook
) (instream
, get_prompt ());
509 if (instream
== stdin
&& stdin_is_tty
)
510 reinitialize_more_filter ();
511 old_chain
= make_cleanup (null_cleanup
, 0);
513 /* Get a command-line. This calls the readline package. */
514 command
= command_line_input (instream
== stdin
?
515 get_prompt () : (char *) NULL
,
516 instream
== stdin
, "prompt");
520 time_at_cmd_start
= get_run_time ();
525 char *lim
= (char *) sbrk (0);
526 space_at_cmd_start
= lim
- lim_at_start
;
530 execute_command (command
, instream
== stdin
);
531 /* Do any commands attached to breakpoint we stopped at. */
532 bpstat_do_actions (&stop_bpstat
);
533 do_cleanups (old_chain
);
537 long cmd_time
= get_run_time () - time_at_cmd_start
;
539 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
540 cmd_time
/ 1000000, cmd_time
% 1000000);
546 char *lim
= (char *) sbrk (0);
547 long space_now
= lim
- lim_at_start
;
548 long space_diff
= space_now
- space_at_cmd_start
;
550 printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"),
552 (space_diff
>= 0 ? '+' : '-'),
559 /* Read commands from `instream' and execute them until end of file or
560 error reading instream. This command loop doesnt care about any
561 such things as displaying time and space usage. If the user asks
562 for those, they won't work. */
564 simplified_command_loop (char *(*read_input_func
) (char *),
565 void (*execute_command_func
) (char *, int))
567 struct cleanup
*old_chain
;
569 int stdin_is_tty
= ISATTY (stdin
);
571 while (instream
&& !feof (instream
))
574 if (instream
== stdin
&& stdin_is_tty
)
575 reinitialize_more_filter ();
576 old_chain
= make_cleanup (null_cleanup
, 0);
578 /* Get a command-line. */
579 command
= (*read_input_func
) (instream
== stdin
?
580 get_prompt () : (char *) NULL
);
585 (*execute_command_func
) (command
, instream
== stdin
);
587 /* Do any commands attached to breakpoint we stopped at. */
588 bpstat_do_actions (&stop_bpstat
);
590 do_cleanups (old_chain
);
594 /* Commands call this if they do not want to be repeated by null lines. */
602 /* If we aren't reading from standard input, we are saving the last
603 thing read from stdin in line and don't want to delete it. Null lines
604 won't repeat here in any case. */
605 if (instream
== stdin
)
609 /* Read a line from the stream "instream" without command line editing.
611 It prints PROMPT_ARG once at the start.
612 Action is compatible with "readline", e.g. space for the result is
613 malloc'd and should be freed by the caller.
615 A NULL return means end of file. */
617 gdb_readline (char *prompt_arg
)
622 int result_size
= 80;
626 /* Don't use a _filtered function here. It causes the assumed
627 character position to be off, since the newline we read from
628 the user is not accounted for. */
629 fputs_unfiltered (prompt_arg
, gdb_stdout
);
630 gdb_flush (gdb_stdout
);
633 result
= (char *) xmalloc (result_size
);
637 /* Read from stdin if we are executing a user defined command.
638 This is the right thing for prompt_for_continue, at least. */
639 c
= fgetc (instream
? instream
: stdin
);
644 /* The last line does not end with a newline. Return it, and
645 if we are called again fgetc will still return EOF and
646 we'll return NULL then. */
654 if (input_index
> 0 && result
[input_index
- 1] == '\r')
659 result
[input_index
++] = c
;
660 while (input_index
>= result_size
)
663 result
= (char *) xrealloc (result
, result_size
);
667 result
[input_index
++] = '\0';
671 /* Variables which control command line editing and history
672 substitution. These variables are given default values at the end
674 static int command_editing_p
;
676 /* NOTE 1999-04-29: This variable will be static again, once we modify
677 gdb to use the event loop as the default command loop and we merge
678 event-top.c into this file, top.c */
680 /* static */ int history_expansion_p
;
682 static int write_history_p
;
684 show_write_history_p (struct ui_file
*file
, int from_tty
,
685 struct cmd_list_element
*c
, const char *value
)
687 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
691 static int history_size
;
693 show_history_size (struct ui_file
*file
, int from_tty
,
694 struct cmd_list_element
*c
, const char *value
)
696 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
700 static char *history_filename
;
702 show_history_filename (struct ui_file
*file
, int from_tty
,
703 struct cmd_list_element
*c
, const char *value
)
705 fprintf_filtered (file
, _("\
706 The filename in which to record the command history is \"%s\".\n"),
710 /* This is like readline(), but it has some gdb-specific behavior.
711 gdb may want readline in both the synchronous and async modes during
712 a single gdb invocation. At the ordinary top-level prompt we might
713 be using the async readline. That means we can't use
714 rl_pre_input_hook, since it doesn't work properly in async mode.
715 However, for a secondary prompt (" >", such as occurs during a
716 `define'), gdb wants a synchronous response.
718 We used to call readline() directly, running it in synchronous
719 mode. But mixing modes this way is not supported, and as of
720 readline 5.x it no longer works; the arrow keys come unbound during
721 the synchronous call. So we make a nested call into the event
722 loop. That's what gdb_readline_wrapper is for. */
724 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
725 rely on gdb_readline_wrapper_result, which might still be NULL if
726 the user types Control-D for EOF. */
727 static int gdb_readline_wrapper_done
;
729 /* The result of the current call to gdb_readline_wrapper, once a newline
731 static char *gdb_readline_wrapper_result
;
733 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
734 to be called after the newline is processed (which will redisplay
735 the prompt). But in gdb_readline_wrapper we will not get a new
736 prompt until the next call, or until we return to the event loop.
737 So we disable this hook around the newline and restore it before we
739 static void (*saved_after_char_processing_hook
) (void);
741 /* This function is called when readline has seen a complete line of
745 gdb_readline_wrapper_line (char *line
)
747 gdb_assert (!gdb_readline_wrapper_done
);
748 gdb_readline_wrapper_result
= line
;
749 gdb_readline_wrapper_done
= 1;
751 /* Prevent operate-and-get-next from acting too early. */
752 saved_after_char_processing_hook
= after_char_processing_hook
;
753 after_char_processing_hook
= NULL
;
755 /* Prevent parts of the prompt from being redisplayed if annotations
756 are enabled, and readline's state getting out of sync. */
757 if (async_command_editing_p
)
758 rl_callback_handler_remove ();
761 struct gdb_readline_wrapper_cleanup
763 void (*handler_orig
) (char *);
764 int already_prompted_orig
;
768 gdb_readline_wrapper_cleanup (void *arg
)
770 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
772 rl_already_prompted
= cleanup
->already_prompted_orig
;
774 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
775 input_handler
= cleanup
->handler_orig
;
776 gdb_readline_wrapper_result
= NULL
;
777 gdb_readline_wrapper_done
= 0;
779 after_char_processing_hook
= saved_after_char_processing_hook
;
780 saved_after_char_processing_hook
= NULL
;
786 gdb_readline_wrapper (char *prompt
)
788 struct cleanup
*back_to
;
789 struct gdb_readline_wrapper_cleanup
*cleanup
;
792 cleanup
= xmalloc (sizeof (*cleanup
));
793 cleanup
->handler_orig
= input_handler
;
794 input_handler
= gdb_readline_wrapper_line
;
796 cleanup
->already_prompted_orig
= rl_already_prompted
;
798 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
800 /* Display our prompt and prevent double prompt display. */
801 display_gdb_prompt (prompt
);
802 rl_already_prompted
= 1;
804 if (after_char_processing_hook
)
805 (*after_char_processing_hook
) ();
806 gdb_assert (after_char_processing_hook
== NULL
);
808 /* gdb_do_one_event argument is unused. */
809 while (gdb_do_one_event (NULL
) >= 0)
810 if (gdb_readline_wrapper_done
)
813 retval
= gdb_readline_wrapper_result
;
814 do_cleanups (back_to
);
823 #if STOP_SIGNAL == SIGTSTP
824 signal (SIGTSTP
, SIG_DFL
);
830 sigprocmask (SIG_SETMASK
, &zero
, 0);
832 #elif HAVE_SIGSETMASK
835 kill (getpid (), SIGTSTP
);
836 signal (SIGTSTP
, stop_sig
);
838 signal (STOP_SIGNAL
, stop_sig
);
840 printf_unfiltered ("%s", get_prompt ());
841 gdb_flush (gdb_stdout
);
843 /* Forget about any previous command -- null line now will do nothing. */
846 #endif /* STOP_SIGNAL */
848 /* Initialize signal handlers. */
850 float_handler (int signo
)
852 /* This message is based on ANSI C, section 4.7. Note that integer
853 divide by zero causes this, so "float" is a misnomer. */
854 signal (SIGFPE
, float_handler
);
855 error (_("Erroneous arithmetic operation."));
859 do_nothing (int signo
)
861 /* Under System V the default disposition of a signal is reinstated after
862 the signal is caught and delivered to an application process. On such
863 systems one must restore the replacement signal handler if one wishes
864 to continue handling the signal in one's program. On BSD systems this
865 is not needed but it is harmless, and it simplifies the code to just do
866 it unconditionally. */
867 signal (signo
, do_nothing
);
870 /* The current saved history number from operate-and-get-next.
871 This is -1 if not valid. */
872 static int operate_saved_history
= -1;
874 /* This is put on the appropriate hook and helps operate-and-get-next
877 gdb_rl_operate_and_get_next_completion (void)
879 int delta
= where_history () - operate_saved_history
;
880 /* The `key' argument to rl_get_previous_history is ignored. */
881 rl_get_previous_history (delta
, 0);
882 operate_saved_history
= -1;
884 /* readline doesn't automatically update the display for us. */
887 after_char_processing_hook
= NULL
;
888 rl_pre_input_hook
= NULL
;
891 /* This is a gdb-local readline command handler. It accepts the
892 current command line (like RET does) and, if this command was taken
893 from the history, arranges for the next command in the history to
894 appear on the command line when the prompt returns.
895 We ignore the arguments. */
897 gdb_rl_operate_and_get_next (int count
, int key
)
901 /* Use the async hook. */
902 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
904 /* Find the current line, and find the next line to use. */
905 where
= where_history();
907 /* FIXME: kettenis/20020817: max_input_history is renamed into
908 history_max_entries in readline-4.2. When we do a new readline
909 import, we should probably change it here too, even though
910 readline maintains backwards compatibility for now by still
911 defining max_input_history. */
912 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
913 (where
>= history_length
- 1))
914 operate_saved_history
= where
;
916 operate_saved_history
= where
+ 1;
918 return rl_newline (1, key
);
921 /* Read one line from the command input stream `instream'
922 into the local static buffer `linebuffer' (whose current length
924 The buffer is made bigger as necessary.
925 Returns the address of the start of the line.
927 NULL is returned for end of file.
929 *If* the instream == stdin & stdin is a terminal, the line read
930 is copied into the file line saver (global var char *line,
931 length linesize) so that it can be duplicated.
933 This routine either uses fancy command line editing or
934 simple input as the user has requested. */
937 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
939 static char *linebuffer
= 0;
940 static unsigned linelength
= 0;
944 char *local_prompt
= prompt_arg
;
948 /* The annotation suffix must be non-NULL. */
949 if (annotation_suffix
== NULL
)
950 annotation_suffix
= "";
952 if (annotation_level
> 1 && instream
== stdin
)
954 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
955 + strlen (annotation_suffix
) + 40);
956 if (prompt_arg
== NULL
)
957 local_prompt
[0] = '\0';
959 strcpy (local_prompt
, prompt_arg
);
960 strcat (local_prompt
, "\n\032\032");
961 strcat (local_prompt
, annotation_suffix
);
962 strcat (local_prompt
, "\n");
968 linebuffer
= (char *) xmalloc (linelength
);
973 /* Control-C quits instantly if typed while in this loop
974 since it should not wait until the user types a newline. */
978 signal (STOP_SIGNAL
, handle_stop_sig
);
983 /* Make sure that all output has been output. Some machines may let
984 you get away with leaving out some of the gdb_flush, but not all. */
986 gdb_flush (gdb_stdout
);
987 gdb_flush (gdb_stderr
);
989 if (source_file_name
!= NULL
)
990 ++source_line_number
;
992 if (annotation_level
> 1 && instream
== stdin
)
994 puts_unfiltered ("\n\032\032pre-");
995 puts_unfiltered (annotation_suffix
);
996 puts_unfiltered ("\n");
999 /* Don't use fancy stuff if not talking to stdin. */
1000 if (deprecated_readline_hook
&& input_from_terminal_p ())
1002 rl
= (*deprecated_readline_hook
) (local_prompt
);
1004 else if (command_editing_p
&& input_from_terminal_p ())
1006 rl
= gdb_readline_wrapper (local_prompt
);
1010 rl
= gdb_readline (local_prompt
);
1013 if (annotation_level
> 1 && instream
== stdin
)
1015 puts_unfiltered ("\n\032\032post-");
1016 puts_unfiltered (annotation_suffix
);
1017 puts_unfiltered ("\n");
1020 if (!rl
|| rl
== (char *) EOF
)
1025 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
1027 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
1028 nline
= (char *) xrealloc (linebuffer
, linelength
);
1029 p
+= nline
- linebuffer
;
1033 /* Copy line. Don't copy null at end. (Leaves line alone
1034 if this was just a newline) */
1038 xfree (rl
); /* Allocated in readline. */
1040 if (p
== linebuffer
|| *(p
- 1) != '\\')
1043 p
--; /* Put on top of '\'. */
1044 local_prompt
= (char *) 0;
1049 signal (STOP_SIGNAL
, SIG_DFL
);
1056 #define SERVER_COMMAND_LENGTH 7
1058 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1059 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1062 /* Note that we don't set `line'. Between this and the check in
1063 dont_repeat, this insures that repeating will still do the
1066 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1069 /* Do history expansion if that is wished. */
1070 if (history_expansion_p
&& instream
== stdin
1071 && ISATTY (instream
))
1073 char *history_value
;
1076 *p
= '\0'; /* Insert null now. */
1077 expanded
= history_expand (linebuffer
, &history_value
);
1080 /* Print the changes. */
1081 printf_unfiltered ("%s\n", history_value
);
1083 /* If there was an error, call this function again. */
1086 xfree (history_value
);
1087 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1089 if (strlen (history_value
) > linelength
)
1091 linelength
= strlen (history_value
) + 1;
1092 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1094 strcpy (linebuffer
, history_value
);
1095 p
= linebuffer
+ strlen (linebuffer
);
1096 xfree (history_value
);
1100 /* If we just got an empty line, and that is supposed
1101 to repeat the previous command, return the value in the
1103 if (repeat
&& p
== linebuffer
)
1105 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1111 /* Add line to history if appropriate. */
1112 if (instream
== stdin
1113 && ISATTY (stdin
) && *linebuffer
)
1114 add_history (linebuffer
);
1116 /* Note: lines consisting solely of comments are added to the command
1117 history. This is useful when you type a command, and then
1118 realize you don't want to execute it quite yet. You can comment
1119 out the command and then later fetch it from the value history
1120 and remove the '#'. The kill ring is probably better, but some
1121 people are in the habit of commenting things out. */
1123 *p1
= '\0'; /* Found a comment. */
1125 /* Save into global buffer if appropriate. */
1128 if (linelength
> linesize
)
1130 line
= xrealloc (line
, linelength
);
1131 linesize
= linelength
;
1133 strcpy (line
, linebuffer
);
1140 /* Print the GDB banner. */
1142 print_gdb_version (struct ui_file
*stream
)
1144 /* From GNU coding standards, first line is meant to be easy for a
1145 program to parse, and is just canonical program name and version
1146 number, which starts after last space. */
1148 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
1150 /* Second line is a copyright notice. */
1152 fprintf_filtered (stream
, "Copyright (C) 2007 Free Software Foundation, Inc.\n");
1154 /* Following the copyright is a brief statement that the program is
1155 free software, that users are free to copy and change it on
1156 certain conditions, that it is covered by the GNU GPL, and that
1157 there is no warranty. */
1159 fprintf_filtered (stream
, "\
1160 GDB is free software, covered by the GNU General Public License, and you are\n\
1161 welcome to change it and/or distribute copies of it under certain conditions.\n\
1162 Type \"show copying\" to see the conditions.\n\
1163 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
1165 /* After the required info we print the configuration information. */
1167 fprintf_filtered (stream
, "This GDB was configured as \"");
1168 if (strcmp (host_name
, target_name
) != 0)
1170 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1174 fprintf_filtered (stream
, "%s", host_name
);
1176 fprintf_filtered (stream
, "\".");
1179 /* get_prompt: access method for the GDB prompt string. */
1188 set_prompt (char *s
)
1190 /* ??rehrauer: I don't know why this fails, since it looks as though
1191 assignments to prompt are wrapped in calls to savestring...
1195 PROMPT (0) = savestring (s
, strlen (s
));
1199 /* If necessary, make the user confirm that we should quit. Return
1200 non-zero if we should quit, zero if we shouldn't. */
1205 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1209 /* This is something of a hack. But there's no reliable way to
1210 see if a GUI is running. The `use_windows' variable doesn't
1212 if (deprecated_init_ui_hook
)
1213 s
= "A debugging session is active.\nDo you still want to close the debugger?";
1214 else if (attach_flag
)
1215 s
= "The program is running. Quit anyway (and detach it)? ";
1217 s
= "The program is running. Exit anyway? ";
1219 if (!query ("%s", s
))
1226 /* Helper routine for quit_force that requires error handling. */
1235 quit_target (void *arg
)
1237 struct qt_args
*qt
= (struct qt_args
*)arg
;
1239 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1242 target_detach (qt
->args
, qt
->from_tty
);
1247 /* UDI wants this, to kill the TIP. */
1248 target_close (¤t_target
, 1);
1250 /* Save the history information if it is appropriate to do so. */
1251 if (write_history_p
&& history_filename
)
1252 write_history (history_filename
);
1254 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1259 /* Quit without asking for confirmation. */
1262 quit_force (char *args
, int from_tty
)
1267 /* An optional expression may be used to cause gdb to terminate with the
1268 value of that expression. */
1271 struct value
*val
= parse_and_eval (args
);
1273 exit_code
= (int) value_as_long (val
);
1275 else if (return_child_result
)
1276 exit_code
= return_child_result_value
;
1279 qt
.from_tty
= from_tty
;
1281 /* We want to handle any quit errors and exit regardless. */
1282 catch_errors (quit_target
, &qt
,
1283 "Quitting: ", RETURN_MASK_ALL
);
1288 /* Returns whether GDB is running on a terminal and input is
1289 currently coming from that terminal. */
1292 input_from_terminal_p (void)
1294 if (gdb_has_a_terminal () && instream
== stdin
)
1297 /* If INSTREAM is unset, and we are not in a user command, we
1298 must be in Insight. That's like having a terminal, for our
1300 if (instream
== NULL
&& !in_user_command
)
1307 dont_repeat_command (char *ignored
, int from_tty
)
1309 *line
= 0; /* Can't call dont_repeat here because we're not
1310 necessarily reading from stdin. */
1313 /* Functions to manipulate command line editing control variables. */
1315 /* Number of commands to print in each call to show_commands. */
1316 #define Hist_print 10
1318 show_commands (char *args
, int from_tty
)
1320 /* Index for history commands. Relative to history_base. */
1323 /* Number of the history entry which we are planning to display next.
1324 Relative to history_base. */
1327 /* The first command in the history which doesn't exist (i.e. one more
1328 than the number of the last command). Relative to history_base. */
1331 /* Print out some of the commands from the command history. */
1332 /* First determine the length of the history list. */
1333 hist_len
= history_size
;
1334 for (offset
= 0; offset
< history_size
; offset
++)
1336 if (!history_get (history_base
+ offset
))
1345 if (args
[0] == '+' && args
[1] == '\0')
1346 /* "info editing +" should print from the stored position. */
1349 /* "info editing <exp>" should print around command number <exp>. */
1350 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1352 /* "show commands" means print the last Hist_print commands. */
1355 num
= hist_len
- Hist_print
;
1361 /* If there are at least Hist_print commands, we want to display the last
1362 Hist_print rather than, say, the last 6. */
1363 if (hist_len
- num
< Hist_print
)
1365 num
= hist_len
- Hist_print
;
1370 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1372 printf_filtered ("%5d %s\n", history_base
+ offset
,
1373 (history_get (history_base
+ offset
))->line
);
1376 /* The next command we want to display is the next one that we haven't
1380 /* If the user repeats this command with return, it should do what
1381 "show commands +" does. This is unnecessary if arg is null,
1382 because "show commands +" is not useful after "show commands". */
1383 if (from_tty
&& args
)
1390 /* Called by do_setshow_command. */
1392 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1394 if (history_size
== INT_MAX
)
1395 unstifle_history ();
1396 else if (history_size
>= 0)
1397 stifle_history (history_size
);
1400 history_size
= INT_MAX
;
1401 error (_("History size must be non-negative"));
1406 set_history (char *args
, int from_tty
)
1408 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1409 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1413 show_history (char *args
, int from_tty
)
1415 cmd_show_list (showhistlist
, from_tty
, "");
1418 int info_verbose
= 0; /* Default verbose msgs off */
1420 /* Called by do_setshow_command. An elaborate joke. */
1422 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1424 char *cmdname
= "verbose";
1425 struct cmd_list_element
*showcmd
;
1427 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1431 c
->doc
= "Set verbose printing of informational messages.";
1432 showcmd
->doc
= "Show verbose printing of informational messages.";
1436 c
->doc
= "Set verbosity.";
1437 showcmd
->doc
= "Show verbosity.";
1441 /* Init the history buffer. Note that we are called after the init file(s)
1442 * have been read so that the user can change the history file via his
1443 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1444 * overrides all of this.
1452 tmpenv
= getenv ("HISTSIZE");
1454 history_size
= atoi (tmpenv
);
1455 else if (!history_size
)
1458 stifle_history (history_size
);
1460 tmpenv
= getenv ("GDBHISTFILE");
1462 history_filename
= savestring (tmpenv
, strlen (tmpenv
));
1463 else if (!history_filename
)
1465 /* We include the current directory so that if the user changes
1466 directories the file written will be the same as the one
1469 /* No leading dots in file names are allowed on MSDOS. */
1470 history_filename
= concat (current_directory
, "/_gdb_history",
1473 history_filename
= concat (current_directory
, "/.gdb_history",
1477 read_history (history_filename
);
1481 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1482 struct cmd_list_element
*c
, const char *value
)
1484 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1488 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1489 struct cmd_list_element
*c
, const char *value
)
1491 fprintf_filtered (file
, _("\
1492 Editing of command lines as they are typed is %s.\n"),
1497 show_annotation_level (struct ui_file
*file
, int from_tty
,
1498 struct cmd_list_element
*c
, const char *value
)
1500 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1504 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1505 struct cmd_list_element
*c
, const char *value
)
1507 fprintf_filtered (file
, _("\
1508 Notification of completion for asynchronous execution commands is %s.\n"),
1514 struct cmd_list_element
*c
;
1516 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1517 whatever the DEFAULT_PROMPT is. */
1518 the_prompts
.top
= 0;
1520 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1522 /* Set things up for annotation_level > 1, if the user ever decides
1524 async_annotation_suffix
= "prompt";
1525 /* Set the variable associated with the setshow prompt command. */
1526 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1528 /* If gdb was started with --annotate=2, this is equivalent to the
1529 user entering the command 'set annotate 2' at the gdb prompt, so
1530 we need to do extra processing. */
1531 if (annotation_level
> 1)
1532 set_async_annotation_level (NULL
, 0, NULL
);
1534 /* Set the important stuff up for command editing. */
1535 command_editing_p
= 1;
1536 history_expansion_p
= 0;
1537 write_history_p
= 0;
1539 /* Setup important stuff for command line editing. */
1540 rl_completion_entry_function
= readline_line_completion_function
;
1541 rl_completer_word_break_characters
= default_word_break_characters ();
1542 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1543 rl_readline_name
= "gdb";
1544 rl_terminal_name
= getenv ("TERM");
1546 /* The name for this defun comes from Bash, where it originated.
1547 15 is Control-o, the same binding this function has in Bash. */
1548 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1550 add_setshow_string_cmd ("prompt", class_support
,
1551 &new_async_prompt
, _("\
1552 Set gdb's prompt"), _("\
1553 Show gdb's prompt"), NULL
,
1555 show_new_async_prompt
,
1556 &setlist
, &showlist
);
1558 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1559 Don't repeat this command.\n\
1560 Primarily used inside of user-defined commands that should not be repeated when\n\
1563 add_setshow_boolean_cmd ("editing", class_support
,
1564 &async_command_editing_p
, _("\
1565 Set editing of command lines as they are typed."), _("\
1566 Show editing of command lines as they are typed."), _("\
1567 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1568 Without an argument, command line editing is enabled. To edit, use\n\
1569 EMACS-like or VI-like commands like control-P or ESC."),
1570 set_async_editing_command
,
1571 show_async_command_editing_p
,
1572 &setlist
, &showlist
);
1574 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1575 Set saving of the history record on exit."), _("\
1576 Show saving of the history record on exit."), _("\
1577 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1578 Without an argument, saving is enabled."),
1580 show_write_history_p
,
1581 &sethistlist
, &showhistlist
);
1583 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1584 Set the size of the command history,"), _("\
1585 Show the size of the command history,"), _("\
1586 ie. the number of previous commands to keep a record of."),
1587 set_history_size_command
,
1589 &sethistlist
, &showhistlist
);
1591 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1592 Set the filename in which to record the command history"), _("\
1593 Show the filename in which to record the command history"), _("\
1594 (the list of previous commands of which a record is kept)."),
1596 show_history_filename
,
1597 &sethistlist
, &showhistlist
);
1599 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1600 Set whether to confirm potentially dangerous operations."), _("\
1601 Show whether to confirm potentially dangerous operations."), NULL
,
1604 &setlist
, &showlist
);
1606 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1607 Set annotation_level."), _("\
1608 Show annotation_level."), _("\
1609 0 == normal; 1 == fullname (for use when running under emacs)\n\
1610 2 == output annotated suitably for use by programs that control GDB."),
1611 set_async_annotation_level
,
1612 show_annotation_level
,
1613 &setlist
, &showlist
);
1615 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1616 &exec_done_display_p
, _("\
1617 Set notification of completion for asynchronous execution commands."), _("\
1618 Show notification of completion for asynchronous execution commands."), _("\
1619 Use \"on\" to enable the notification, and \"off\" to disable it."),
1621 show_exec_done_display_p
,
1622 &setlist
, &showlist
);
1626 gdb_init (char *argv0
)
1628 if (pre_init_ui_hook
)
1629 pre_init_ui_hook ();
1631 /* Run the init function of each source file */
1633 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
1634 current_directory
= gdb_dirbuf
;
1637 /* Make sure we return to the original directory upon exit, come
1638 what may, since the OS doesn't do that for us. */
1639 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1642 init_cmd_lists (); /* This needs to be done first */
1643 initialize_targets (); /* Setup target_terminal macros for utils.c */
1644 initialize_utils (); /* Make errors and warnings possible */
1645 initialize_all_files ();
1646 initialize_current_architecture ();
1648 init_main (); /* But that omits this file! Do it now */
1650 initialize_stdin_serial ();
1652 async_init_signals ();
1654 /* We need a default language for parsing expressions, so simple things like
1655 "set width 0" won't fail if no language is explicitly set in a config file
1656 or implicitly set by reading an executable during startup. */
1657 set_language (language_c
);
1658 expected_language
= current_language
; /* don't warn about the change. */
1660 /* Allow another UI to initialize. If the UI fails to initialize,
1661 and it wants GDB to revert to the CLI, it should clear
1662 deprecated_init_ui_hook. */
1663 if (deprecated_init_ui_hook
)
1664 deprecated_init_ui_hook (argv0
);