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 /* If the selected thread has terminated, we allow only a
404 limited set of commands. */
405 if (target_can_async_p ()
406 && is_exited (inferior_ptid
)
407 && !get_cmd_no_selected_thread_ok (c
))
409 Cannot execute this command without a live selected thread. See `help thread'."));
411 /* Pass null arg rather than an empty one. */
414 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
415 while the is_complete_command(cfunc) test is just plain
416 bogus. They should both be replaced by a test of the form
417 c->strip_trailing_white_space_p. */
418 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
419 can't be replaced with func. This is because it is the
420 cfunc, and not the func, that has the value that the
421 is_complete_command hack is testing for. */
422 /* Clear off trailing whitespace, except for set and complete
425 && c
->type
!= set_cmd
426 && !is_complete_command (c
))
428 p
= arg
+ strlen (arg
) - 1;
429 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
434 /* If this command has been pre-hooked, run the hook first. */
435 execute_cmd_pre_hook (c
);
437 if (c
->flags
& DEPRECATED_WARN_USER
)
438 deprecated_cmd_warning (&line
);
440 if (c
->class == class_user
)
441 execute_user_command (c
, arg
);
442 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
443 do_setshow_command (arg
, from_tty
& caution
, c
);
444 else if (!cmd_func_p (c
))
445 error (_("That is not a command, just a help topic."));
446 else if (deprecated_call_command_hook
)
447 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
449 cmd_func (c
, arg
, from_tty
& caution
);
451 /* If this command has been post-hooked, run the hook last. */
452 execute_cmd_post_hook (c
);
456 /* Tell the user if the language has changed (except first time). */
457 if (current_language
!= expected_language
)
459 if (language_mode
== language_mode_auto
)
461 language_info (1); /* Print what changed. */
466 /* Warn the user if the working language does not match the
467 language of the current frame. Only warn the user if we are
468 actually running the program, i.e. there is a stack. */
469 /* FIXME: This should be cacheing the frame and only running when
470 the frame changes. */
472 if (target_has_stack
&& is_stopped (inferior_ptid
))
474 flang
= get_frame_language ();
476 && flang
!= language_unknown
477 && flang
!= current_language
->la_language
)
479 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
485 /* Read commands from `instream' and execute them
486 until end of file or error reading instream. */
491 struct cleanup
*old_chain
;
493 int stdin_is_tty
= ISATTY (stdin
);
494 long time_at_cmd_start
;
496 long space_at_cmd_start
= 0;
498 extern int display_time
;
499 extern int display_space
;
501 while (instream
&& !feof (instream
))
503 if (window_hook
&& instream
== stdin
)
504 (*window_hook
) (instream
, get_prompt ());
507 if (instream
== stdin
&& stdin_is_tty
)
508 reinitialize_more_filter ();
509 old_chain
= make_cleanup (null_cleanup
, 0);
511 /* Get a command-line. This calls the readline package. */
512 command
= command_line_input (instream
== stdin
?
513 get_prompt () : (char *) NULL
,
514 instream
== stdin
, "prompt");
518 time_at_cmd_start
= get_run_time ();
523 char *lim
= (char *) sbrk (0);
524 space_at_cmd_start
= lim
- lim_at_start
;
528 execute_command (command
, instream
== stdin
);
530 /* Do any commands attached to breakpoint we are stopped at. */
531 bpstat_do_actions ();
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 (%s%ld for this command)\n"),
552 (space_diff
>= 0 ? "+" : ""),
559 /* Commands call this if they do not want to be repeated by null lines. */
567 /* If we aren't reading from standard input, we are saving the last
568 thing read from stdin in line and don't want to delete it. Null lines
569 won't repeat here in any case. */
570 if (instream
== stdin
)
574 /* Read a line from the stream "instream" without command line editing.
576 It prints PROMPT_ARG once at the start.
577 Action is compatible with "readline", e.g. space for the result is
578 malloc'd and should be freed by the caller.
580 A NULL return means end of file. */
582 gdb_readline (char *prompt_arg
)
587 int result_size
= 80;
591 /* Don't use a _filtered function here. It causes the assumed
592 character position to be off, since the newline we read from
593 the user is not accounted for. */
594 fputs_unfiltered (prompt_arg
, gdb_stdout
);
595 gdb_flush (gdb_stdout
);
598 result
= (char *) xmalloc (result_size
);
602 /* Read from stdin if we are executing a user defined command.
603 This is the right thing for prompt_for_continue, at least. */
604 c
= fgetc (instream
? instream
: stdin
);
609 /* The last line does not end with a newline. Return it, and
610 if we are called again fgetc will still return EOF and
611 we'll return NULL then. */
619 if (input_index
> 0 && result
[input_index
- 1] == '\r')
624 result
[input_index
++] = c
;
625 while (input_index
>= result_size
)
628 result
= (char *) xrealloc (result
, result_size
);
632 result
[input_index
++] = '\0';
636 /* Variables which control command line editing and history
637 substitution. These variables are given default values at the end
639 static int command_editing_p
;
641 /* NOTE 1999-04-29: This variable will be static again, once we modify
642 gdb to use the event loop as the default command loop and we merge
643 event-top.c into this file, top.c */
645 /* static */ int history_expansion_p
;
647 static int write_history_p
;
649 show_write_history_p (struct ui_file
*file
, int from_tty
,
650 struct cmd_list_element
*c
, const char *value
)
652 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
656 static int history_size
;
658 show_history_size (struct ui_file
*file
, int from_tty
,
659 struct cmd_list_element
*c
, const char *value
)
661 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
665 static char *history_filename
;
667 show_history_filename (struct ui_file
*file
, int from_tty
,
668 struct cmd_list_element
*c
, const char *value
)
670 fprintf_filtered (file
, _("\
671 The filename in which to record the command history is \"%s\".\n"),
675 /* This is like readline(), but it has some gdb-specific behavior.
676 gdb may want readline in both the synchronous and async modes during
677 a single gdb invocation. At the ordinary top-level prompt we might
678 be using the async readline. That means we can't use
679 rl_pre_input_hook, since it doesn't work properly in async mode.
680 However, for a secondary prompt (" >", such as occurs during a
681 `define'), gdb wants a synchronous response.
683 We used to call readline() directly, running it in synchronous
684 mode. But mixing modes this way is not supported, and as of
685 readline 5.x it no longer works; the arrow keys come unbound during
686 the synchronous call. So we make a nested call into the event
687 loop. That's what gdb_readline_wrapper is for. */
689 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
690 rely on gdb_readline_wrapper_result, which might still be NULL if
691 the user types Control-D for EOF. */
692 static int gdb_readline_wrapper_done
;
694 /* The result of the current call to gdb_readline_wrapper, once a newline
696 static char *gdb_readline_wrapper_result
;
698 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
699 to be called after the newline is processed (which will redisplay
700 the prompt). But in gdb_readline_wrapper we will not get a new
701 prompt until the next call, or until we return to the event loop.
702 So we disable this hook around the newline and restore it before we
704 static void (*saved_after_char_processing_hook
) (void);
706 /* This function is called when readline has seen a complete line of
710 gdb_readline_wrapper_line (char *line
)
712 gdb_assert (!gdb_readline_wrapper_done
);
713 gdb_readline_wrapper_result
= line
;
714 gdb_readline_wrapper_done
= 1;
716 /* Prevent operate-and-get-next from acting too early. */
717 saved_after_char_processing_hook
= after_char_processing_hook
;
718 after_char_processing_hook
= NULL
;
720 /* Prevent parts of the prompt from being redisplayed if annotations
721 are enabled, and readline's state getting out of sync. */
722 if (async_command_editing_p
)
723 rl_callback_handler_remove ();
726 struct gdb_readline_wrapper_cleanup
728 void (*handler_orig
) (char *);
729 int already_prompted_orig
;
733 gdb_readline_wrapper_cleanup (void *arg
)
735 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
737 rl_already_prompted
= cleanup
->already_prompted_orig
;
739 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
740 input_handler
= cleanup
->handler_orig
;
741 gdb_readline_wrapper_result
= NULL
;
742 gdb_readline_wrapper_done
= 0;
744 after_char_processing_hook
= saved_after_char_processing_hook
;
745 saved_after_char_processing_hook
= NULL
;
751 gdb_readline_wrapper (char *prompt
)
753 struct cleanup
*back_to
;
754 struct gdb_readline_wrapper_cleanup
*cleanup
;
757 cleanup
= xmalloc (sizeof (*cleanup
));
758 cleanup
->handler_orig
= input_handler
;
759 input_handler
= gdb_readline_wrapper_line
;
761 cleanup
->already_prompted_orig
= rl_already_prompted
;
763 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
765 /* Display our prompt and prevent double prompt display. */
766 display_gdb_prompt (prompt
);
767 rl_already_prompted
= 1;
769 if (after_char_processing_hook
)
770 (*after_char_processing_hook
) ();
771 gdb_assert (after_char_processing_hook
== NULL
);
773 /* gdb_do_one_event argument is unused. */
774 while (gdb_do_one_event (NULL
) >= 0)
775 if (gdb_readline_wrapper_done
)
778 retval
= gdb_readline_wrapper_result
;
779 do_cleanups (back_to
);
788 #if STOP_SIGNAL == SIGTSTP
789 signal (SIGTSTP
, SIG_DFL
);
795 sigprocmask (SIG_SETMASK
, &zero
, 0);
797 #elif HAVE_SIGSETMASK
800 kill (getpid (), SIGTSTP
);
801 signal (SIGTSTP
, stop_sig
);
803 signal (STOP_SIGNAL
, stop_sig
);
805 printf_unfiltered ("%s", get_prompt ());
806 gdb_flush (gdb_stdout
);
808 /* Forget about any previous command -- null line now will do nothing. */
811 #endif /* STOP_SIGNAL */
813 /* Initialize signal handlers. */
815 float_handler (int signo
)
817 /* This message is based on ANSI C, section 4.7. Note that integer
818 divide by zero causes this, so "float" is a misnomer. */
819 signal (SIGFPE
, float_handler
);
820 error (_("Erroneous arithmetic operation."));
824 do_nothing (int signo
)
826 /* Under System V the default disposition of a signal is reinstated after
827 the signal is caught and delivered to an application process. On such
828 systems one must restore the replacement signal handler if one wishes
829 to continue handling the signal in one's program. On BSD systems this
830 is not needed but it is harmless, and it simplifies the code to just do
831 it unconditionally. */
832 signal (signo
, do_nothing
);
835 /* The current saved history number from operate-and-get-next.
836 This is -1 if not valid. */
837 static int operate_saved_history
= -1;
839 /* This is put on the appropriate hook and helps operate-and-get-next
842 gdb_rl_operate_and_get_next_completion (void)
844 int delta
= where_history () - operate_saved_history
;
845 /* The `key' argument to rl_get_previous_history is ignored. */
846 rl_get_previous_history (delta
, 0);
847 operate_saved_history
= -1;
849 /* readline doesn't automatically update the display for us. */
852 after_char_processing_hook
= NULL
;
853 rl_pre_input_hook
= NULL
;
856 /* This is a gdb-local readline command handler. It accepts the
857 current command line (like RET does) and, if this command was taken
858 from the history, arranges for the next command in the history to
859 appear on the command line when the prompt returns.
860 We ignore the arguments. */
862 gdb_rl_operate_and_get_next (int count
, int key
)
866 /* Use the async hook. */
867 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
869 /* Find the current line, and find the next line to use. */
870 where
= where_history();
872 /* FIXME: kettenis/20020817: max_input_history is renamed into
873 history_max_entries in readline-4.2. When we do a new readline
874 import, we should probably change it here too, even though
875 readline maintains backwards compatibility for now by still
876 defining max_input_history. */
877 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
878 (where
>= history_length
- 1))
879 operate_saved_history
= where
;
881 operate_saved_history
= where
+ 1;
883 return rl_newline (1, key
);
886 /* Read one line from the command input stream `instream'
887 into the local static buffer `linebuffer' (whose current length
889 The buffer is made bigger as necessary.
890 Returns the address of the start of the line.
892 NULL is returned for end of file.
894 *If* the instream == stdin & stdin is a terminal, the line read
895 is copied into the file line saver (global var char *line,
896 length linesize) so that it can be duplicated.
898 This routine either uses fancy command line editing or
899 simple input as the user has requested. */
902 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
904 static char *linebuffer
= 0;
905 static unsigned linelength
= 0;
909 char *local_prompt
= prompt_arg
;
913 /* The annotation suffix must be non-NULL. */
914 if (annotation_suffix
== NULL
)
915 annotation_suffix
= "";
917 if (annotation_level
> 1 && instream
== stdin
)
919 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
920 + strlen (annotation_suffix
) + 40);
921 if (prompt_arg
== NULL
)
922 local_prompt
[0] = '\0';
924 strcpy (local_prompt
, prompt_arg
);
925 strcat (local_prompt
, "\n\032\032");
926 strcat (local_prompt
, annotation_suffix
);
927 strcat (local_prompt
, "\n");
933 linebuffer
= (char *) xmalloc (linelength
);
938 /* Control-C quits instantly if typed while in this loop
939 since it should not wait until the user types a newline. */
943 signal (STOP_SIGNAL
, handle_stop_sig
);
948 /* Make sure that all output has been output. Some machines may let
949 you get away with leaving out some of the gdb_flush, but not all. */
951 gdb_flush (gdb_stdout
);
952 gdb_flush (gdb_stderr
);
954 if (source_file_name
!= NULL
)
955 ++source_line_number
;
957 if (annotation_level
> 1 && instream
== stdin
)
959 puts_unfiltered ("\n\032\032pre-");
960 puts_unfiltered (annotation_suffix
);
961 puts_unfiltered ("\n");
964 /* Don't use fancy stuff if not talking to stdin. */
965 if (deprecated_readline_hook
&& input_from_terminal_p ())
967 rl
= (*deprecated_readline_hook
) (local_prompt
);
969 else if (command_editing_p
&& input_from_terminal_p ())
971 rl
= gdb_readline_wrapper (local_prompt
);
975 rl
= gdb_readline (local_prompt
);
978 if (annotation_level
> 1 && instream
== stdin
)
980 puts_unfiltered ("\n\032\032post-");
981 puts_unfiltered (annotation_suffix
);
982 puts_unfiltered ("\n");
985 if (!rl
|| rl
== (char *) EOF
)
990 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
992 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
993 nline
= (char *) xrealloc (linebuffer
, linelength
);
994 p
+= nline
- linebuffer
;
998 /* Copy line. Don't copy null at end. (Leaves line alone
999 if this was just a newline) */
1003 xfree (rl
); /* Allocated in readline. */
1005 if (p
== linebuffer
|| *(p
- 1) != '\\')
1008 p
--; /* Put on top of '\'. */
1009 local_prompt
= (char *) 0;
1014 signal (STOP_SIGNAL
, SIG_DFL
);
1021 #define SERVER_COMMAND_LENGTH 7
1023 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1024 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1027 /* Note that we don't set `line'. Between this and the check in
1028 dont_repeat, this insures that repeating will still do the
1031 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1034 /* Do history expansion if that is wished. */
1035 if (history_expansion_p
&& instream
== stdin
1036 && ISATTY (instream
))
1038 char *history_value
;
1041 *p
= '\0'; /* Insert null now. */
1042 expanded
= history_expand (linebuffer
, &history_value
);
1045 /* Print the changes. */
1046 printf_unfiltered ("%s\n", history_value
);
1048 /* If there was an error, call this function again. */
1051 xfree (history_value
);
1052 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1054 if (strlen (history_value
) > linelength
)
1056 linelength
= strlen (history_value
) + 1;
1057 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1059 strcpy (linebuffer
, history_value
);
1060 p
= linebuffer
+ strlen (linebuffer
);
1062 xfree (history_value
);
1065 /* If we just got an empty line, and that is supposed
1066 to repeat the previous command, return the value in the
1068 if (repeat
&& p
== linebuffer
)
1070 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1076 /* Add line to history if appropriate. */
1077 if (instream
== stdin
1078 && ISATTY (stdin
) && *linebuffer
)
1079 add_history (linebuffer
);
1081 /* Note: lines consisting solely of comments are added to the command
1082 history. This is useful when you type a command, and then
1083 realize you don't want to execute it quite yet. You can comment
1084 out the command and then later fetch it from the value history
1085 and remove the '#'. The kill ring is probably better, but some
1086 people are in the habit of commenting things out. */
1088 *p1
= '\0'; /* Found a comment. */
1090 /* Save into global buffer if appropriate. */
1093 if (linelength
> linesize
)
1095 line
= xrealloc (line
, linelength
);
1096 linesize
= linelength
;
1098 strcpy (line
, linebuffer
);
1105 /* Print the GDB banner. */
1107 print_gdb_version (struct ui_file
*stream
)
1109 /* From GNU coding standards, first line is meant to be easy for a
1110 program to parse, and is just canonical program name and version
1111 number, which starts after last space. */
1113 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1115 /* Second line is a copyright notice. */
1117 fprintf_filtered (stream
, "Copyright (C) 2009 Free Software Foundation, Inc.\n");
1119 /* Following the copyright is a brief statement that the program is
1120 free software, that users are free to copy and change it on
1121 certain conditions, that it is covered by the GNU GPL, and that
1122 there is no warranty. */
1124 fprintf_filtered (stream
, "\
1125 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1126 This is free software: you are free to change and redistribute it.\n\
1127 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1128 and \"show warranty\" for details.\n");
1130 /* After the required info we print the configuration information. */
1132 fprintf_filtered (stream
, "This GDB was configured as \"");
1133 if (strcmp (host_name
, target_name
) != 0)
1135 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1139 fprintf_filtered (stream
, "%s", host_name
);
1141 fprintf_filtered (stream
, "\".");
1143 if (REPORT_BUGS_TO
[0])
1145 fprintf_filtered (stream
,
1146 _("\nFor bug reporting instructions, please see:\n"));
1147 fprintf_filtered (stream
, "%s.", REPORT_BUGS_TO
);
1151 /* get_prompt: access method for the GDB prompt string. */
1160 set_prompt (char *s
)
1162 /* ??rehrauer: I don't know why this fails, since it looks as though
1163 assignments to prompt are wrapped in calls to savestring...
1167 PROMPT (0) = savestring (s
, strlen (s
));
1171 /* If necessary, make the user confirm that we should quit. Return
1172 non-zero if we should quit, zero if we shouldn't. */
1177 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1180 struct inferior
*inf
= current_inferior ();
1182 /* This is something of a hack. But there's no reliable way to
1183 see if a GUI is running. The `use_windows' variable doesn't
1185 if (deprecated_init_ui_hook
)
1186 s
= "A debugging session is active.\nDo you still want to close the debugger?";
1187 else if (inf
->attach_flag
)
1188 s
= "The program is running. Quit anyway (and detach it)? ";
1190 s
= "The program is running. Quit anyway (and kill it)? ";
1192 if (!query ("%s", s
))
1205 /* Callback for iterate_over_threads. Finds any thread of inferior
1206 given by ARG (really an int*). */
1209 any_thread_of (struct thread_info
*thread
, void *arg
)
1211 int pid
= * (int *)arg
;
1213 if (PIDGET (thread
->ptid
) == pid
)
1219 /* Callback for iterate_over_inferiors. Kills or detaches the given
1220 inferior, depending on how we originally gained control of it. */
1223 kill_or_detach (struct inferior
*inf
, void *args
)
1225 struct qt_args
*qt
= args
;
1226 struct thread_info
*thread
;
1228 thread
= iterate_over_threads (any_thread_of
, &inf
->pid
);
1231 switch_to_thread (thread
->ptid
);
1232 if (inf
->attach_flag
)
1233 target_detach (qt
->args
, qt
->from_tty
);
1241 /* Helper routine for quit_force that requires error handling. */
1244 quit_target (void *arg
)
1246 struct qt_args
*qt
= (struct qt_args
*)arg
;
1248 /* Kill or detach all inferiors. */
1249 iterate_over_inferiors (kill_or_detach
, qt
);
1251 /* Give all pushed targets a chance to do minimal cleanup, and pop
1253 pop_all_targets (1);
1255 /* Save the history information if it is appropriate to do so. */
1256 if (write_history_p
&& history_filename
)
1257 write_history (history_filename
);
1259 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1264 /* Quit without asking for confirmation. */
1267 quit_force (char *args
, int from_tty
)
1272 /* An optional expression may be used to cause gdb to terminate with the
1273 value of that expression. */
1276 struct value
*val
= parse_and_eval (args
);
1278 exit_code
= (int) value_as_long (val
);
1280 else if (return_child_result
)
1281 exit_code
= return_child_result_value
;
1284 qt
.from_tty
= from_tty
;
1286 /* We want to handle any quit errors and exit regardless. */
1287 catch_errors (quit_target
, &qt
,
1288 "Quitting: ", RETURN_MASK_ALL
);
1293 /* Returns whether GDB is running on a terminal and input is
1294 currently coming from that terminal. */
1297 input_from_terminal_p (void)
1299 if (gdb_has_a_terminal () && instream
== stdin
)
1302 /* If INSTREAM is unset, and we are not in a user command, we
1303 must be in Insight. That's like having a terminal, for our
1305 if (instream
== NULL
&& !in_user_command
)
1312 dont_repeat_command (char *ignored
, int from_tty
)
1314 *line
= 0; /* Can't call dont_repeat here because we're not
1315 necessarily reading from stdin. */
1318 /* Functions to manipulate command line editing control variables. */
1320 /* Number of commands to print in each call to show_commands. */
1321 #define Hist_print 10
1323 show_commands (char *args
, int from_tty
)
1325 /* Index for history commands. Relative to history_base. */
1328 /* Number of the history entry which we are planning to display next.
1329 Relative to history_base. */
1332 /* The first command in the history which doesn't exist (i.e. one more
1333 than the number of the last command). Relative to history_base. */
1336 /* Print out some of the commands from the command history. */
1337 /* First determine the length of the history list. */
1338 hist_len
= history_size
;
1339 for (offset
= 0; offset
< history_size
; offset
++)
1341 if (!history_get (history_base
+ offset
))
1350 if (args
[0] == '+' && args
[1] == '\0')
1351 /* "info editing +" should print from the stored position. */
1354 /* "info editing <exp>" should print around command number <exp>. */
1355 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1357 /* "show commands" means print the last Hist_print commands. */
1360 num
= hist_len
- Hist_print
;
1366 /* If there are at least Hist_print commands, we want to display the last
1367 Hist_print rather than, say, the last 6. */
1368 if (hist_len
- num
< Hist_print
)
1370 num
= hist_len
- Hist_print
;
1375 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1377 printf_filtered ("%5d %s\n", history_base
+ offset
,
1378 (history_get (history_base
+ offset
))->line
);
1381 /* The next command we want to display is the next one that we haven't
1385 /* If the user repeats this command with return, it should do what
1386 "show commands +" does. This is unnecessary if arg is null,
1387 because "show commands +" is not useful after "show commands". */
1388 if (from_tty
&& args
)
1395 /* Called by do_setshow_command. */
1397 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1399 if (history_size
== INT_MAX
)
1400 unstifle_history ();
1401 else if (history_size
>= 0)
1402 stifle_history (history_size
);
1405 history_size
= INT_MAX
;
1406 error (_("History size must be non-negative"));
1411 set_history (char *args
, int from_tty
)
1413 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1414 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1418 show_history (char *args
, int from_tty
)
1420 cmd_show_list (showhistlist
, from_tty
, "");
1423 int info_verbose
= 0; /* Default verbose msgs off */
1425 /* Called by do_setshow_command. An elaborate joke. */
1427 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1429 char *cmdname
= "verbose";
1430 struct cmd_list_element
*showcmd
;
1432 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1436 c
->doc
= "Set verbose printing of informational messages.";
1437 showcmd
->doc
= "Show verbose printing of informational messages.";
1441 c
->doc
= "Set verbosity.";
1442 showcmd
->doc
= "Show verbosity.";
1446 /* Init the history buffer. Note that we are called after the init file(s)
1447 * have been read so that the user can change the history file via his
1448 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1449 * overrides all of this.
1457 tmpenv
= getenv ("HISTSIZE");
1459 history_size
= atoi (tmpenv
);
1460 else if (!history_size
)
1463 stifle_history (history_size
);
1465 tmpenv
= getenv ("GDBHISTFILE");
1467 history_filename
= savestring (tmpenv
, strlen (tmpenv
));
1468 else if (!history_filename
)
1470 /* We include the current directory so that if the user changes
1471 directories the file written will be the same as the one
1474 /* No leading dots in file names are allowed on MSDOS. */
1475 history_filename
= concat (current_directory
, "/_gdb_history",
1478 history_filename
= concat (current_directory
, "/.gdb_history",
1482 read_history (history_filename
);
1486 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1487 struct cmd_list_element
*c
, const char *value
)
1489 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1493 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1494 struct cmd_list_element
*c
, const char *value
)
1496 fprintf_filtered (file
, _("\
1497 Editing of command lines as they are typed is %s.\n"),
1502 show_annotation_level (struct ui_file
*file
, int from_tty
,
1503 struct cmd_list_element
*c
, const char *value
)
1505 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1509 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1510 struct cmd_list_element
*c
, const char *value
)
1512 fprintf_filtered (file
, _("\
1513 Notification of completion for asynchronous execution commands is %s.\n"),
1519 struct cmd_list_element
*c
;
1521 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1522 whatever the DEFAULT_PROMPT is. */
1523 the_prompts
.top
= 0;
1525 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1527 /* Set things up for annotation_level > 1, if the user ever decides
1529 async_annotation_suffix
= "prompt";
1530 /* Set the variable associated with the setshow prompt command. */
1531 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1533 /* If gdb was started with --annotate=2, this is equivalent to the
1534 user entering the command 'set annotate 2' at the gdb prompt, so
1535 we need to do extra processing. */
1536 if (annotation_level
> 1)
1537 set_async_annotation_level (NULL
, 0, NULL
);
1539 /* Set the important stuff up for command editing. */
1540 command_editing_p
= 1;
1541 history_expansion_p
= 0;
1542 write_history_p
= 0;
1544 /* Setup important stuff for command line editing. */
1545 rl_completion_entry_function
= readline_line_completion_function
;
1546 rl_completer_word_break_characters
= default_word_break_characters ();
1547 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1548 rl_readline_name
= "gdb";
1549 rl_terminal_name
= getenv ("TERM");
1551 /* The name for this defun comes from Bash, where it originated.
1552 15 is Control-o, the same binding this function has in Bash. */
1553 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1555 add_setshow_string_cmd ("prompt", class_support
,
1556 &new_async_prompt
, _("\
1557 Set gdb's prompt"), _("\
1558 Show gdb's prompt"), NULL
,
1560 show_new_async_prompt
,
1561 &setlist
, &showlist
);
1563 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1564 Don't repeat this command.\n\
1565 Primarily used inside of user-defined commands that should not be repeated when\n\
1568 add_setshow_boolean_cmd ("editing", class_support
,
1569 &async_command_editing_p
, _("\
1570 Set editing of command lines as they are typed."), _("\
1571 Show editing of command lines as they are typed."), _("\
1572 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1573 Without an argument, command line editing is enabled. To edit, use\n\
1574 EMACS-like or VI-like commands like control-P or ESC."),
1575 set_async_editing_command
,
1576 show_async_command_editing_p
,
1577 &setlist
, &showlist
);
1579 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1580 Set saving of the history record on exit."), _("\
1581 Show saving of the history record on exit."), _("\
1582 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1583 Without an argument, saving is enabled."),
1585 show_write_history_p
,
1586 &sethistlist
, &showhistlist
);
1588 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1589 Set the size of the command history,"), _("\
1590 Show the size of the command history,"), _("\
1591 ie. the number of previous commands to keep a record of."),
1592 set_history_size_command
,
1594 &sethistlist
, &showhistlist
);
1596 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1597 Set the filename in which to record the command history"), _("\
1598 Show the filename in which to record the command history"), _("\
1599 (the list of previous commands of which a record is kept)."),
1601 show_history_filename
,
1602 &sethistlist
, &showhistlist
);
1604 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1605 Set whether to confirm potentially dangerous operations."), _("\
1606 Show whether to confirm potentially dangerous operations."), NULL
,
1609 &setlist
, &showlist
);
1611 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1612 Set annotation_level."), _("\
1613 Show annotation_level."), _("\
1614 0 == normal; 1 == fullname (for use when running under emacs)\n\
1615 2 == output annotated suitably for use by programs that control GDB."),
1616 set_async_annotation_level
,
1617 show_annotation_level
,
1618 &setlist
, &showlist
);
1620 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1621 &exec_done_display_p
, _("\
1622 Set notification of completion for asynchronous execution commands."), _("\
1623 Show notification of completion for asynchronous execution commands."), _("\
1624 Use \"on\" to enable the notification, and \"off\" to disable it."),
1626 show_exec_done_display_p
,
1627 &setlist
, &showlist
);
1631 gdb_init (char *argv0
)
1633 if (pre_init_ui_hook
)
1634 pre_init_ui_hook ();
1636 /* Run the init function of each source file */
1639 /* Make sure we return to the original directory upon exit, come
1640 what may, since the OS doesn't do that for us. */
1641 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1644 init_cmd_lists (); /* This needs to be done first */
1645 initialize_targets (); /* Setup target_terminal macros for utils.c */
1646 initialize_utils (); /* Make errors and warnings possible */
1647 initialize_all_files ();
1648 initialize_current_architecture ();
1650 init_main (); /* But that omits this file! Do it now */
1652 initialize_stdin_serial ();
1654 async_init_signals ();
1656 /* We need a default language for parsing expressions, so simple things like
1657 "set width 0" won't fail if no language is explicitly set in a config file
1658 or implicitly set by reading an executable during startup. */
1659 set_language (language_c
);
1660 expected_language
= current_language
; /* don't warn about the change. */
1662 /* Allow another UI to initialize. If the UI fails to initialize,
1663 and it wants GDB to revert to the CLI, it should clear
1664 deprecated_init_ui_hook. */
1665 if (deprecated_init_ui_hook
)
1666 deprecated_init_ui_hook (argv0
);