1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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"
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 /* Current working directory. */
117 char *current_directory
;
119 /* The directory name is actually stored here (usually). */
120 char gdb_dirbuf
[1024];
122 /* Function to call before reading a command, if nonzero.
123 The function receives two args: an input stream,
124 and a prompt string. */
126 void (*window_hook
) (FILE *, char *);
131 /* gdb prints this when reading a command interactively */
132 static char *gdb_prompt_string
; /* the global prompt string */
134 /* Buffer used for reading command lines, and the size
135 allocated for it so far. */
140 /* Nonzero if the current command is modified by "server ". This
141 affects things like recording into the command history, commands
142 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
143 whatever) can issue its own commands and also send along commands
144 from the user, and have the user not notice that the user interface
145 is issuing commands too. */
148 /* Baud rate specified for talking to serial target systems. Default
149 is left as -1, so targets can choose their own defaults. */
150 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
151 or (unsigned int)-1. This is a Bad User Interface. */
155 /* Timeout limit for response from target. */
157 /* The default value has been changed many times over the years. It
158 was originally 5 seconds. But that was thought to be a long time
159 to sit and wait, so it was changed to 2 seconds. That was thought
160 to be plenty unless the connection was going through some terminal
161 server or multiplexer or other form of hairy serial connection.
163 In mid-1996, remote_timeout was moved from remote.c to top.c and
164 it began being used in other remote-* targets. It appears that the
165 default was changed to 20 seconds at that time, perhaps because the
166 Renesas E7000 ICE didn't always respond in a timely manner.
168 But if 5 seconds is a long time to sit and wait for retransmissions,
169 20 seconds is far worse. This demonstrates the difficulty of using
170 a single variable for all protocol timeouts.
172 As remote.c is used much more than remote-e7000.c, it was changed
173 back to 2 seconds in 1999. */
175 int remote_timeout
= 2;
177 /* Non-zero tells remote* modules to output debugging info. */
179 int remote_debug
= 0;
181 /* Non-zero means the target is running. Note: this is different from
182 saying that there is an active target and we are stopped at a
183 breakpoint, for instance. This is a real indicator whether the
184 target is off and running, which gdb is doing something else. */
185 int target_executing
= 0;
187 /* Sbrk location on entry to main. Used for statistics only. */
192 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
196 #define STOP_SIGNAL SIGTSTP
197 static void stop_sig (int);
201 /* Hooks for alternate command interfaces. */
203 /* Called after most modules have been initialized, but before taking users
206 If the UI fails to initialize and it wants GDB to continue
207 using the default UI, then it should clear this hook before returning. */
209 void (*deprecated_init_ui_hook
) (char *argv0
);
211 /* This hook is called from within gdb's many mini-event loops which could
212 steal control from a real user interface's event loop. It returns
213 non-zero if the user is requesting a detach, zero otherwise. */
215 int (*deprecated_ui_loop_hook
) (int);
217 /* Called instead of command_loop at top level. Can be invoked via
218 throw_exception(). */
220 void (*deprecated_command_loop_hook
) (void);
223 /* Called from print_frame_info to list the line we stopped in. */
225 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
, int line
,
226 int stopline
, int noerror
);
227 /* Replaces most of query. */
229 int (*deprecated_query_hook
) (const char *, va_list);
231 /* Replaces most of warning. */
233 void (*deprecated_warning_hook
) (const char *, va_list);
235 /* These three functions support getting lines of text from the user.
236 They are used in sequence. First deprecated_readline_begin_hook is
237 called with a text string that might be (for example) a message for
238 the user to type in a sequence of commands to be executed at a
239 breakpoint. If this function calls back to a GUI, it might take
240 this opportunity to pop up a text interaction window with this
241 message. Next, deprecated_readline_hook is called with a prompt
242 that is emitted prior to collecting the user input. It can be
243 called multiple times. Finally, deprecated_readline_end_hook is
244 called to notify the GUI that we are done with the interaction
245 window and it can close it. */
247 void (*deprecated_readline_begin_hook
) (char *, ...);
248 char *(*deprecated_readline_hook
) (char *);
249 void (*deprecated_readline_end_hook
) (void);
251 /* Called as appropriate to notify the interface of the specified breakpoint
254 void (*deprecated_create_breakpoint_hook
) (struct breakpoint
* bpt
);
255 void (*deprecated_delete_breakpoint_hook
) (struct breakpoint
* bpt
);
256 void (*deprecated_modify_breakpoint_hook
) (struct breakpoint
* bpt
);
258 /* Called as appropriate to notify the interface that we have attached
259 to or detached from an already running process. */
261 void (*deprecated_attach_hook
) (void);
262 void (*deprecated_detach_hook
) (void);
264 /* Called during long calculations to allow GUI to repair window damage, and to
265 check for stop buttons, etc... */
267 void (*deprecated_interactive_hook
) (void);
269 /* Called when the registers have changed, as a hint to a GUI
270 to minimize window update. */
272 void (*deprecated_registers_changed_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 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
401 /* If the target is running, we allow only a limited set of
403 if (target_can_async_p () && target_executing
)
404 if (strcmp (c
->name
, "help") != 0
405 && strcmp (c
->name
, "pwd") != 0
406 && strcmp (c
->name
, "show") != 0
407 && strcmp (c
->name
, "stop") != 0)
408 error (_("Cannot execute this command while the target is running."));
410 /* Pass null arg rather than an empty one. */
413 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
414 while the is_complete_command(cfunc) test is just plain
415 bogus. They should both be replaced by a test of the form
416 c->strip_trailing_white_space_p. */
417 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
418 can't be replaced with func. This is because it is the
419 cfunc, and not the func, that has the value that the
420 is_complete_command hack is testing for. */
421 /* Clear off trailing whitespace, except for set and complete
424 && c
->type
!= set_cmd
425 && !is_complete_command (c
))
427 p
= arg
+ strlen (arg
) - 1;
428 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
433 /* If this command has been pre-hooked, run the hook first. */
434 execute_cmd_pre_hook (c
);
436 if (c
->flags
& DEPRECATED_WARN_USER
)
437 deprecated_cmd_warning (&line
);
439 if (c
->class == class_user
)
440 execute_user_command (c
, arg
);
441 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
442 do_setshow_command (arg
, from_tty
& caution
, c
);
443 else if (!cmd_func_p (c
))
444 error (_("That is not a command, just a help topic."));
445 else if (deprecated_call_command_hook
)
446 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
448 cmd_func (c
, arg
, from_tty
& caution
);
450 /* If this command has been post-hooked, run the hook last. */
451 execute_cmd_post_hook (c
);
455 /* Tell the user if the language has changed (except first time). */
456 if (current_language
!= expected_language
)
458 if (language_mode
== language_mode_auto
)
460 language_info (1); /* Print what changed. */
465 /* Warn the user if the working language does not match the
466 language of the current frame. Only warn the user if we are
467 actually running the program, i.e. there is a stack. */
468 /* FIXME: This should be cacheing the frame and only running when
469 the frame changes. */
471 if (target_has_stack
)
473 flang
= get_frame_language ();
475 && flang
!= language_unknown
476 && flang
!= current_language
->la_language
)
478 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
484 /* Read commands from `instream' and execute them
485 until end of file or error reading instream. */
490 struct cleanup
*old_chain
;
492 int stdin_is_tty
= ISATTY (stdin
);
493 long time_at_cmd_start
;
495 long space_at_cmd_start
= 0;
497 extern int display_time
;
498 extern int display_space
;
500 while (instream
&& !feof (instream
))
502 if (window_hook
&& instream
== stdin
)
503 (*window_hook
) (instream
, get_prompt ());
506 if (instream
== stdin
&& stdin_is_tty
)
507 reinitialize_more_filter ();
508 old_chain
= make_cleanup (null_cleanup
, 0);
510 /* Get a command-line. This calls the readline package. */
511 command
= command_line_input (instream
== stdin
?
512 get_prompt () : (char *) NULL
,
513 instream
== stdin
, "prompt");
517 time_at_cmd_start
= get_run_time ();
522 char *lim
= (char *) sbrk (0);
523 space_at_cmd_start
= lim
- lim_at_start
;
527 execute_command (command
, instream
== stdin
);
528 /* Do any commands attached to breakpoint we stopped at. */
529 bpstat_do_actions (&stop_bpstat
);
530 do_cleanups (old_chain
);
534 long cmd_time
= get_run_time () - time_at_cmd_start
;
536 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
537 cmd_time
/ 1000000, cmd_time
% 1000000);
543 char *lim
= (char *) sbrk (0);
544 long space_now
= lim
- lim_at_start
;
545 long space_diff
= space_now
- space_at_cmd_start
;
547 printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"),
549 (space_diff
>= 0 ? '+' : '-'),
556 /* Read commands from `instream' and execute them until end of file or
557 error reading instream. This command loop doesnt care about any
558 such things as displaying time and space usage. If the user asks
559 for those, they won't work. */
561 simplified_command_loop (char *(*read_input_func
) (char *),
562 void (*execute_command_func
) (char *, int))
564 struct cleanup
*old_chain
;
566 int stdin_is_tty
= ISATTY (stdin
);
568 while (instream
&& !feof (instream
))
571 if (instream
== stdin
&& stdin_is_tty
)
572 reinitialize_more_filter ();
573 old_chain
= make_cleanup (null_cleanup
, 0);
575 /* Get a command-line. */
576 command
= (*read_input_func
) (instream
== stdin
?
577 get_prompt () : (char *) NULL
);
582 (*execute_command_func
) (command
, instream
== stdin
);
584 /* Do any commands attached to breakpoint we stopped at. */
585 bpstat_do_actions (&stop_bpstat
);
587 do_cleanups (old_chain
);
591 /* Commands call this if they do not want to be repeated by null lines. */
599 /* If we aren't reading from standard input, we are saving the last
600 thing read from stdin in line and don't want to delete it. Null lines
601 won't repeat here in any case. */
602 if (instream
== stdin
)
606 /* Read a line from the stream "instream" without command line editing.
608 It prints PROMPT_ARG once at the start.
609 Action is compatible with "readline", e.g. space for the result is
610 malloc'd and should be freed by the caller.
612 A NULL return means end of file. */
614 gdb_readline (char *prompt_arg
)
619 int result_size
= 80;
623 /* Don't use a _filtered function here. It causes the assumed
624 character position to be off, since the newline we read from
625 the user is not accounted for. */
626 fputs_unfiltered (prompt_arg
, gdb_stdout
);
627 gdb_flush (gdb_stdout
);
630 result
= (char *) xmalloc (result_size
);
634 /* Read from stdin if we are executing a user defined command.
635 This is the right thing for prompt_for_continue, at least. */
636 c
= fgetc (instream
? instream
: stdin
);
641 /* The last line does not end with a newline. Return it, and
642 if we are called again fgetc will still return EOF and
643 we'll return NULL then. */
651 if (input_index
> 0 && result
[input_index
- 1] == '\r')
656 result
[input_index
++] = c
;
657 while (input_index
>= result_size
)
660 result
= (char *) xrealloc (result
, result_size
);
664 result
[input_index
++] = '\0';
668 /* Variables which control command line editing and history
669 substitution. These variables are given default values at the end
671 static int command_editing_p
;
673 /* NOTE 1999-04-29: This variable will be static again, once we modify
674 gdb to use the event loop as the default command loop and we merge
675 event-top.c into this file, top.c */
677 /* static */ int history_expansion_p
;
679 static int write_history_p
;
681 show_write_history_p (struct ui_file
*file
, int from_tty
,
682 struct cmd_list_element
*c
, const char *value
)
684 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
688 static int history_size
;
690 show_history_size (struct ui_file
*file
, int from_tty
,
691 struct cmd_list_element
*c
, const char *value
)
693 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
697 static char *history_filename
;
699 show_history_filename (struct ui_file
*file
, int from_tty
,
700 struct cmd_list_element
*c
, const char *value
)
702 fprintf_filtered (file
, _("\
703 The filename in which to record the command history is \"%s\".\n"),
707 /* This is like readline(), but it has some gdb-specific behavior.
708 gdb can use readline in both the synchronous and async modes during
709 a single gdb invocation. At the ordinary top-level prompt we might
710 be using the async readline. That means we can't use
711 rl_pre_input_hook, since it doesn't work properly in async mode.
712 However, for a secondary prompt (" >", such as occurs during a
713 `define'), gdb just calls readline() directly, running it in
714 synchronous mode. So for operate-and-get-next to work in this
715 situation, we have to switch the hooks around. That is what
716 gdb_readline_wrapper is for. */
718 gdb_readline_wrapper (char *prompt
)
720 /* Set the hook that works in this case. */
721 if (after_char_processing_hook
)
723 rl_pre_input_hook
= (Function
*) after_char_processing_hook
;
724 after_char_processing_hook
= NULL
;
727 return readline (prompt
);
735 #if STOP_SIGNAL == SIGTSTP
736 signal (SIGTSTP
, SIG_DFL
);
742 sigprocmask (SIG_SETMASK
, &zero
, 0);
744 #elif HAVE_SIGSETMASK
747 kill (getpid (), SIGTSTP
);
748 signal (SIGTSTP
, stop_sig
);
750 signal (STOP_SIGNAL
, stop_sig
);
752 printf_unfiltered ("%s", get_prompt ());
753 gdb_flush (gdb_stdout
);
755 /* Forget about any previous command -- null line now will do nothing. */
758 #endif /* STOP_SIGNAL */
760 /* Initialize signal handlers. */
762 float_handler (int signo
)
764 /* This message is based on ANSI C, section 4.7. Note that integer
765 divide by zero causes this, so "float" is a misnomer. */
766 signal (SIGFPE
, float_handler
);
767 error (_("Erroneous arithmetic operation."));
771 do_nothing (int signo
)
773 /* Under System V the default disposition of a signal is reinstated after
774 the signal is caught and delivered to an application process. On such
775 systems one must restore the replacement signal handler if one wishes
776 to continue handling the signal in one's program. On BSD systems this
777 is not needed but it is harmless, and it simplifies the code to just do
778 it unconditionally. */
779 signal (signo
, do_nothing
);
782 /* The current saved history number from operate-and-get-next.
783 This is -1 if not valid. */
784 static int operate_saved_history
= -1;
786 /* This is put on the appropriate hook and helps operate-and-get-next
789 gdb_rl_operate_and_get_next_completion (void)
791 int delta
= where_history () - operate_saved_history
;
792 /* The `key' argument to rl_get_previous_history is ignored. */
793 rl_get_previous_history (delta
, 0);
794 operate_saved_history
= -1;
796 /* readline doesn't automatically update the display for us. */
799 after_char_processing_hook
= NULL
;
800 rl_pre_input_hook
= NULL
;
803 /* This is a gdb-local readline command handler. It accepts the
804 current command line (like RET does) and, if this command was taken
805 from the history, arranges for the next command in the history to
806 appear on the command line when the prompt returns.
807 We ignore the arguments. */
809 gdb_rl_operate_and_get_next (int count
, int key
)
813 /* Use the async hook. */
814 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
816 /* Find the current line, and find the next line to use. */
817 where
= where_history();
819 /* FIXME: kettenis/20020817: max_input_history is renamed into
820 history_max_entries in readline-4.2. When we do a new readline
821 import, we should probably change it here too, even though
822 readline maintains backwards compatibility for now by still
823 defining max_input_history. */
824 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
825 (where
>= history_length
- 1))
826 operate_saved_history
= where
;
828 operate_saved_history
= where
+ 1;
830 return rl_newline (1, key
);
833 /* Read one line from the command input stream `instream'
834 into the local static buffer `linebuffer' (whose current length
836 The buffer is made bigger as necessary.
837 Returns the address of the start of the line.
839 NULL is returned for end of file.
841 *If* the instream == stdin & stdin is a terminal, the line read
842 is copied into the file line saver (global var char *line,
843 length linesize) so that it can be duplicated.
845 This routine either uses fancy command line editing or
846 simple input as the user has requested. */
849 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
851 static char *linebuffer
= 0;
852 static unsigned linelength
= 0;
856 char *local_prompt
= prompt_arg
;
860 /* The annotation suffix must be non-NULL. */
861 if (annotation_suffix
== NULL
)
862 annotation_suffix
= "";
864 if (annotation_level
> 1 && instream
== stdin
)
866 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
867 + strlen (annotation_suffix
) + 40);
868 if (prompt_arg
== NULL
)
869 local_prompt
[0] = '\0';
871 strcpy (local_prompt
, prompt_arg
);
872 strcat (local_prompt
, "\n\032\032");
873 strcat (local_prompt
, annotation_suffix
);
874 strcat (local_prompt
, "\n");
880 linebuffer
= (char *) xmalloc (linelength
);
885 /* Control-C quits instantly if typed while in this loop
886 since it should not wait until the user types a newline. */
890 signal (STOP_SIGNAL
, handle_stop_sig
);
895 /* Make sure that all output has been output. Some machines may let
896 you get away with leaving out some of the gdb_flush, but not all. */
898 gdb_flush (gdb_stdout
);
899 gdb_flush (gdb_stderr
);
901 if (source_file_name
!= NULL
)
902 ++source_line_number
;
904 if (annotation_level
> 1 && instream
== stdin
)
906 puts_unfiltered ("\n\032\032pre-");
907 puts_unfiltered (annotation_suffix
);
908 puts_unfiltered ("\n");
911 /* Don't use fancy stuff if not talking to stdin. */
912 if (deprecated_readline_hook
&& instream
== NULL
)
914 rl
= (*deprecated_readline_hook
) (local_prompt
);
916 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
918 rl
= gdb_readline_wrapper (local_prompt
);
922 rl
= gdb_readline (local_prompt
);
925 if (annotation_level
> 1 && instream
== stdin
)
927 puts_unfiltered ("\n\032\032post-");
928 puts_unfiltered (annotation_suffix
);
929 puts_unfiltered ("\n");
932 if (!rl
|| rl
== (char *) EOF
)
937 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
939 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
940 nline
= (char *) xrealloc (linebuffer
, linelength
);
941 p
+= nline
- linebuffer
;
945 /* Copy line. Don't copy null at end. (Leaves line alone
946 if this was just a newline) */
950 xfree (rl
); /* Allocated in readline. */
952 if (p
== linebuffer
|| *(p
- 1) != '\\')
955 p
--; /* Put on top of '\'. */
956 local_prompt
= (char *) 0;
961 signal (STOP_SIGNAL
, SIG_DFL
);
968 #define SERVER_COMMAND_LENGTH 7
970 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
971 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
974 /* Note that we don't set `line'. Between this and the check in
975 dont_repeat, this insures that repeating will still do the
978 return linebuffer
+ SERVER_COMMAND_LENGTH
;
981 /* Do history expansion if that is wished. */
982 if (history_expansion_p
&& instream
== stdin
983 && ISATTY (instream
))
988 *p
= '\0'; /* Insert null now. */
989 expanded
= history_expand (linebuffer
, &history_value
);
992 /* Print the changes. */
993 printf_unfiltered ("%s\n", history_value
);
995 /* If there was an error, call this function again. */
998 xfree (history_value
);
999 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1001 if (strlen (history_value
) > linelength
)
1003 linelength
= strlen (history_value
) + 1;
1004 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1006 strcpy (linebuffer
, history_value
);
1007 p
= linebuffer
+ strlen (linebuffer
);
1008 xfree (history_value
);
1012 /* If we just got an empty line, and that is supposed
1013 to repeat the previous command, return the value in the
1015 if (repeat
&& p
== linebuffer
)
1017 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1023 /* Add line to history if appropriate. */
1024 if (instream
== stdin
1025 && ISATTY (stdin
) && *linebuffer
)
1026 add_history (linebuffer
);
1028 /* Note: lines consisting solely of comments are added to the command
1029 history. This is useful when you type a command, and then
1030 realize you don't want to execute it quite yet. You can comment
1031 out the command and then later fetch it from the value history
1032 and remove the '#'. The kill ring is probably better, but some
1033 people are in the habit of commenting things out. */
1035 *p1
= '\0'; /* Found a comment. */
1037 /* Save into global buffer if appropriate. */
1040 if (linelength
> linesize
)
1042 line
= xrealloc (line
, linelength
);
1043 linesize
= linelength
;
1045 strcpy (line
, linebuffer
);
1052 /* Print the GDB banner. */
1054 print_gdb_version (struct ui_file
*stream
)
1056 /* From GNU coding standards, first line is meant to be easy for a
1057 program to parse, and is just canonical program name and version
1058 number, which starts after last space. */
1060 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
1062 /* Second line is a copyright notice. */
1064 fprintf_filtered (stream
, "Copyright (C) 2006 Free Software Foundation, Inc.\n");
1066 /* Following the copyright is a brief statement that the program is
1067 free software, that users are free to copy and change it on
1068 certain conditions, that it is covered by the GNU GPL, and that
1069 there is no warranty. */
1071 fprintf_filtered (stream
, "\
1072 GDB is free software, covered by the GNU General Public License, and you are\n\
1073 welcome to change it and/or distribute copies of it under certain conditions.\n\
1074 Type \"show copying\" to see the conditions.\n\
1075 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
1077 /* After the required info we print the configuration information. */
1079 fprintf_filtered (stream
, "This GDB was configured as \"");
1080 if (strcmp (host_name
, target_name
) != 0)
1082 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1086 fprintf_filtered (stream
, "%s", host_name
);
1088 fprintf_filtered (stream
, "\".");
1091 /* get_prompt: access method for the GDB prompt string. */
1100 set_prompt (char *s
)
1102 /* ??rehrauer: I don't know why this fails, since it looks as though
1103 assignments to prompt are wrapped in calls to savestring...
1107 PROMPT (0) = savestring (s
, strlen (s
));
1111 /* If necessary, make the user confirm that we should quit. Return
1112 non-zero if we should quit, zero if we shouldn't. */
1117 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1121 /* This is something of a hack. But there's no reliable way to
1122 see if a GUI is running. The `use_windows' variable doesn't
1124 if (deprecated_init_ui_hook
)
1125 s
= "A debugging session is active.\nDo you still want to close the debugger?";
1126 else if (attach_flag
)
1127 s
= "The program is running. Quit anyway (and detach it)? ";
1129 s
= "The program is running. Exit anyway? ";
1131 if (!query ("%s", s
))
1138 /* Helper routine for quit_force that requires error handling. */
1147 quit_target (void *arg
)
1149 struct qt_args
*qt
= (struct qt_args
*)arg
;
1151 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1154 target_detach (qt
->args
, qt
->from_tty
);
1159 /* UDI wants this, to kill the TIP. */
1160 target_close (¤t_target
, 1);
1162 /* Save the history information if it is appropriate to do so. */
1163 if (write_history_p
&& history_filename
)
1164 write_history (history_filename
);
1166 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1171 /* Quit without asking for confirmation. */
1174 quit_force (char *args
, int from_tty
)
1179 /* An optional expression may be used to cause gdb to terminate with the
1180 value of that expression. */
1183 struct value
*val
= parse_and_eval (args
);
1185 exit_code
= (int) value_as_long (val
);
1187 else if (return_child_result
)
1188 exit_code
= return_child_result_value
;
1191 qt
.from_tty
= from_tty
;
1193 /* We want to handle any quit errors and exit regardless. */
1194 catch_errors (quit_target
, &qt
,
1195 "Quitting: ", RETURN_MASK_ALL
);
1200 /* Returns whether GDB is running on a terminal and whether the user
1201 desires that questions be asked of them on that terminal. */
1204 input_from_terminal_p (void)
1206 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
1210 dont_repeat_command (char *ignored
, int from_tty
)
1212 *line
= 0; /* Can't call dont_repeat here because we're not
1213 necessarily reading from stdin. */
1216 /* Functions to manipulate command line editing control variables. */
1218 /* Number of commands to print in each call to show_commands. */
1219 #define Hist_print 10
1221 show_commands (char *args
, int from_tty
)
1223 /* Index for history commands. Relative to history_base. */
1226 /* Number of the history entry which we are planning to display next.
1227 Relative to history_base. */
1230 /* The first command in the history which doesn't exist (i.e. one more
1231 than the number of the last command). Relative to history_base. */
1234 /* Print out some of the commands from the command history. */
1235 /* First determine the length of the history list. */
1236 hist_len
= history_size
;
1237 for (offset
= 0; offset
< history_size
; offset
++)
1239 if (!history_get (history_base
+ offset
))
1248 if (args
[0] == '+' && args
[1] == '\0')
1249 /* "info editing +" should print from the stored position. */
1252 /* "info editing <exp>" should print around command number <exp>. */
1253 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1255 /* "show commands" means print the last Hist_print commands. */
1258 num
= hist_len
- Hist_print
;
1264 /* If there are at least Hist_print commands, we want to display the last
1265 Hist_print rather than, say, the last 6. */
1266 if (hist_len
- num
< Hist_print
)
1268 num
= hist_len
- Hist_print
;
1273 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1275 printf_filtered ("%5d %s\n", history_base
+ offset
,
1276 (history_get (history_base
+ offset
))->line
);
1279 /* The next command we want to display is the next one that we haven't
1283 /* If the user repeats this command with return, it should do what
1284 "show commands +" does. This is unnecessary if arg is null,
1285 because "show commands +" is not useful after "show commands". */
1286 if (from_tty
&& args
)
1293 /* Called by do_setshow_command. */
1295 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1297 if (history_size
== INT_MAX
)
1298 unstifle_history ();
1299 else if (history_size
>= 0)
1300 stifle_history (history_size
);
1303 history_size
= INT_MAX
;
1304 error (_("History size must be non-negative"));
1309 set_history (char *args
, int from_tty
)
1311 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1312 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1316 show_history (char *args
, int from_tty
)
1318 cmd_show_list (showhistlist
, from_tty
, "");
1321 int info_verbose
= 0; /* Default verbose msgs off */
1323 /* Called by do_setshow_command. An elaborate joke. */
1325 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1327 char *cmdname
= "verbose";
1328 struct cmd_list_element
*showcmd
;
1330 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1334 c
->doc
= "Set verbose printing of informational messages.";
1335 showcmd
->doc
= "Show verbose printing of informational messages.";
1339 c
->doc
= "Set verbosity.";
1340 showcmd
->doc
= "Show verbosity.";
1344 /* Init the history buffer. Note that we are called after the init file(s)
1345 * have been read so that the user can change the history file via his
1346 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1347 * overrides all of this.
1355 tmpenv
= getenv ("HISTSIZE");
1357 history_size
= atoi (tmpenv
);
1358 else if (!history_size
)
1361 stifle_history (history_size
);
1363 tmpenv
= getenv ("GDBHISTFILE");
1365 history_filename
= savestring (tmpenv
, strlen (tmpenv
));
1366 else if (!history_filename
)
1368 /* We include the current directory so that if the user changes
1369 directories the file written will be the same as the one
1372 /* No leading dots in file names are allowed on MSDOS. */
1373 history_filename
= concat (current_directory
, "/_gdb_history",
1376 history_filename
= concat (current_directory
, "/.gdb_history",
1380 read_history (history_filename
);
1384 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1385 struct cmd_list_element
*c
, const char *value
)
1387 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1391 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1392 struct cmd_list_element
*c
, const char *value
)
1394 fprintf_filtered (file
, _("\
1395 Editing of command lines as they are typed is %s.\n"),
1400 show_annotation_level (struct ui_file
*file
, int from_tty
,
1401 struct cmd_list_element
*c
, const char *value
)
1403 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1407 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1408 struct cmd_list_element
*c
, const char *value
)
1410 fprintf_filtered (file
, _("\
1411 Notification of completion for asynchronous execution commands is %s.\n"),
1417 struct cmd_list_element
*c
;
1419 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1420 whatever the DEFAULT_PROMPT is. */
1421 the_prompts
.top
= 0;
1423 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1425 /* Set things up for annotation_level > 1, if the user ever decides
1427 async_annotation_suffix
= "prompt";
1428 /* Set the variable associated with the setshow prompt command. */
1429 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1431 /* If gdb was started with --annotate=2, this is equivalent to the
1432 user entering the command 'set annotate 2' at the gdb prompt, so
1433 we need to do extra processing. */
1434 if (annotation_level
> 1)
1435 set_async_annotation_level (NULL
, 0, NULL
);
1437 /* Set the important stuff up for command editing. */
1438 command_editing_p
= 1;
1439 history_expansion_p
= 0;
1440 write_history_p
= 0;
1442 /* Setup important stuff for command line editing. */
1443 rl_completion_entry_function
= readline_line_completion_function
;
1444 rl_completer_word_break_characters
= default_word_break_characters ();
1445 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1446 rl_readline_name
= "gdb";
1447 rl_terminal_name
= getenv ("TERM");
1449 /* The name for this defun comes from Bash, where it originated.
1450 15 is Control-o, the same binding this function has in Bash. */
1451 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1453 add_setshow_string_cmd ("prompt", class_support
,
1454 &new_async_prompt
, _("\
1455 Set gdb's prompt"), _("\
1456 Show gdb's prompt"), NULL
,
1458 show_new_async_prompt
,
1459 &setlist
, &showlist
);
1461 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1462 Don't repeat this command.\n\
1463 Primarily used inside of user-defined commands that should not be repeated when\n\
1466 add_setshow_boolean_cmd ("editing", class_support
,
1467 &async_command_editing_p
, _("\
1468 Set editing of command lines as they are typed."), _("\
1469 Show editing of command lines as they are typed."), _("\
1470 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1471 Without an argument, command line editing is enabled. To edit, use\n\
1472 EMACS-like or VI-like commands like control-P or ESC."),
1473 set_async_editing_command
,
1474 show_async_command_editing_p
,
1475 &setlist
, &showlist
);
1477 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1478 Set saving of the history record on exit."), _("\
1479 Show saving of the history record on exit."), _("\
1480 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1481 Without an argument, saving is enabled."),
1483 show_write_history_p
,
1484 &sethistlist
, &showhistlist
);
1486 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1487 Set the size of the command history,"), _("\
1488 Show the size of the command history,"), _("\
1489 ie. the number of previous commands to keep a record of."),
1490 set_history_size_command
,
1492 &sethistlist
, &showhistlist
);
1494 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1495 Set the filename in which to record the command history"), _("\
1496 Show the filename in which to record the command history"), _("\
1497 (the list of previous commands of which a record is kept)."),
1499 show_history_filename
,
1500 &sethistlist
, &showhistlist
);
1502 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1503 Set whether to confirm potentially dangerous operations."), _("\
1504 Show whether to confirm potentially dangerous operations."), NULL
,
1507 &setlist
, &showlist
);
1509 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1510 Set annotation_level."), _("\
1511 Show annotation_level."), _("\
1512 0 == normal; 1 == fullname (for use when running under emacs)\n\
1513 2 == output annotated suitably for use by programs that control GDB."),
1514 set_async_annotation_level
,
1515 show_annotation_level
,
1516 &setlist
, &showlist
);
1518 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1519 &exec_done_display_p
, _("\
1520 Set notification of completion for asynchronous execution commands."), _("\
1521 Show notification of completion for asynchronous execution commands."), _("\
1522 Use \"on\" to enable the notification, and \"off\" to disable it."),
1524 show_exec_done_display_p
,
1525 &setlist
, &showlist
);
1529 gdb_init (char *argv0
)
1531 if (pre_init_ui_hook
)
1532 pre_init_ui_hook ();
1534 /* Run the init function of each source file */
1536 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
1537 current_directory
= gdb_dirbuf
;
1540 /* Make sure we return to the original directory upon exit, come
1541 what may, since the OS doesn't do that for us. */
1542 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1545 init_cmd_lists (); /* This needs to be done first */
1546 initialize_targets (); /* Setup target_terminal macros for utils.c */
1547 initialize_utils (); /* Make errors and warnings possible */
1548 initialize_all_files ();
1549 initialize_current_architecture ();
1551 init_main (); /* But that omits this file! Do it now */
1553 initialize_stdin_serial ();
1555 async_init_signals ();
1557 /* We need a default language for parsing expressions, so simple things like
1558 "set width 0" won't fail if no language is explicitly set in a config file
1559 or implicitly set by reading an executable during startup. */
1560 set_language (language_c
);
1561 expected_language
= current_language
; /* don't warn about the change. */
1563 /* Allow another UI to initialize. If the UI fails to initialize,
1564 and it wants GDB to revert to the CLI, it should clear
1565 deprecated_init_ui_hook. */
1566 if (deprecated_init_ui_hook
)
1567 deprecated_init_ui_hook (argv0
);