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
,
272 /* Used by UI as a wrapper around command execution. May do various things
273 like enabling/disabling buttons, etc... */
275 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
, char *cmd
,
278 /* Called after a `set' command has finished. Is only run if the
279 `set' command succeeded. */
281 void (*deprecated_set_hook
) (struct cmd_list_element
* c
);
283 /* Called when the current thread changes. Argument is thread id. */
285 void (*deprecated_context_hook
) (int id
);
287 /* Handler for SIGHUP. */
290 /* NOTE 1999-04-29: This function will be static again, once we modify
291 gdb to use the event loop as the default command loop and we merge
292 event-top.c into this file, top.c */
296 caution
= 0; /* Throw caution to the wind -- we're exiting.
297 This prevents asking the user dumb questions. */
298 quit_command ((char *) 0, 0);
301 #endif /* defined SIGHUP */
303 /* Line number we are currently in in a file which is being sourced. */
304 /* NOTE 1999-04-29: This variable will be static again, once we modify
305 gdb to use the event loop as the default command loop and we merge
306 event-top.c into this file, top.c */
307 /* static */ int source_line_number
;
309 /* Name of the file we are sourcing. */
310 /* NOTE 1999-04-29: This variable will be static again, once we modify
311 gdb to use the event loop as the default command loop and we merge
312 event-top.c into this file, top.c */
313 /* static */ char *source_file_name
;
315 /* Clean up on error during a "source" command (or execution of a
316 user-defined command). */
319 do_restore_instream_cleanup (void *stream
)
321 /* Restore the previous input stream. */
325 /* Read commands from STREAM. */
327 read_command_file (FILE *stream
)
329 struct cleanup
*cleanups
;
331 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
334 do_cleanups (cleanups
);
337 void (*pre_init_ui_hook
) (void);
341 do_chdir_cleanup (void *old_dir
)
348 /* Execute the line P as a command.
349 Pass FROM_TTY as second argument to the defining function. */
351 /* Execute command P, in the current user context. */
354 execute_command (char *p
, int from_tty
)
356 struct cmd_list_element
*c
;
358 static int warned
= 0;
360 long time_at_cmd_start
= 0;
362 long space_at_cmd_start
= 0;
364 extern int display_time
;
365 extern int display_space
;
367 if (target_can_async_p ())
369 time_at_cmd_start
= get_run_time ();
374 char *lim
= (char *) sbrk (0);
375 space_at_cmd_start
= lim
- lim_at_start
;
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 target_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 /* Pass null arg rather than an empty one. */
407 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
408 while the is_complete_command(cfunc) test is just plain
409 bogus. They should both be replaced by a test of the form
410 c->strip_trailing_white_space_p. */
411 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
412 can't be replaced with func. This is because it is the
413 cfunc, and not the func, that has the value that the
414 is_complete_command hack is testing for. */
415 /* Clear off trailing whitespace, except for set and complete
418 && c
->type
!= set_cmd
419 && !is_complete_command (c
))
421 p
= arg
+ strlen (arg
) - 1;
422 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
427 /* If this command has been pre-hooked, run the hook first. */
428 execute_cmd_pre_hook (c
);
430 if (c
->flags
& DEPRECATED_WARN_USER
)
431 deprecated_cmd_warning (&line
);
433 if (c
->class == class_user
)
434 execute_user_command (c
, arg
);
435 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
436 do_setshow_command (arg
, from_tty
& caution
, c
);
437 else if (!cmd_func_p (c
))
438 error (_("That is not a command, just a help topic."));
439 else if (deprecated_call_command_hook
)
440 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
442 cmd_func (c
, arg
, from_tty
& caution
);
444 /* If this command has been post-hooked, run the hook last. */
445 execute_cmd_post_hook (c
);
449 /* Tell the user if the language has changed (except first time). */
450 if (current_language
!= expected_language
)
452 if (language_mode
== language_mode_auto
)
454 language_info (1); /* Print what changed. */
459 /* Warn the user if the working language does not match the
460 language of the current frame. Only warn the user if we are
461 actually running the program, i.e. there is a stack. */
462 /* FIXME: This should be cacheing the frame and only running when
463 the frame changes. */
465 if (has_stack_frames ())
467 flang
= get_frame_language ();
469 && flang
!= language_unknown
470 && flang
!= current_language
->la_language
)
472 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
478 /* Read commands from `instream' and execute them
479 until end of file or error reading instream. */
484 struct cleanup
*old_chain
;
486 int stdin_is_tty
= ISATTY (stdin
);
487 long time_at_cmd_start
;
489 long space_at_cmd_start
= 0;
491 extern int display_time
;
492 extern int display_space
;
494 while (instream
&& !feof (instream
))
496 if (window_hook
&& instream
== stdin
)
497 (*window_hook
) (instream
, get_prompt ());
500 if (instream
== stdin
&& stdin_is_tty
)
501 reinitialize_more_filter ();
502 old_chain
= make_cleanup (null_cleanup
, 0);
504 /* Get a command-line. This calls the readline package. */
505 command
= command_line_input (instream
== stdin
?
506 get_prompt () : (char *) NULL
,
507 instream
== stdin
, "prompt");
511 time_at_cmd_start
= get_run_time ();
516 char *lim
= (char *) sbrk (0);
517 space_at_cmd_start
= lim
- lim_at_start
;
521 execute_command (command
, instream
== stdin
);
523 /* Do any commands attached to breakpoint we are stopped at. */
524 bpstat_do_actions ();
526 do_cleanups (old_chain
);
530 long cmd_time
= get_run_time () - time_at_cmd_start
;
532 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
533 cmd_time
/ 1000000, cmd_time
% 1000000);
539 char *lim
= (char *) sbrk (0);
540 long space_now
= lim
- lim_at_start
;
541 long space_diff
= space_now
- space_at_cmd_start
;
543 printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"),
545 (space_diff
>= 0 ? "+" : ""),
552 /* Commands call this if they do not want to be repeated by null lines. */
560 /* If we aren't reading from standard input, we are saving the last
561 thing read from stdin in line and don't want to delete it. Null lines
562 won't repeat here in any case. */
563 if (instream
== stdin
)
567 /* Read a line from the stream "instream" without command line editing.
569 It prints PROMPT_ARG once at the start.
570 Action is compatible with "readline", e.g. space for the result is
571 malloc'd and should be freed by the caller.
573 A NULL return means end of file. */
575 gdb_readline (char *prompt_arg
)
580 int result_size
= 80;
584 /* Don't use a _filtered function here. It causes the assumed
585 character position to be off, since the newline we read from
586 the user is not accounted for. */
587 fputs_unfiltered (prompt_arg
, gdb_stdout
);
588 gdb_flush (gdb_stdout
);
591 result
= (char *) xmalloc (result_size
);
595 /* Read from stdin if we are executing a user defined command.
596 This is the right thing for prompt_for_continue, at least. */
597 c
= fgetc (instream
? instream
: stdin
);
602 /* The last line does not end with a newline. Return it, and
603 if we are called again fgetc will still return EOF and
604 we'll return NULL then. */
612 if (input_index
> 0 && result
[input_index
- 1] == '\r')
617 result
[input_index
++] = c
;
618 while (input_index
>= result_size
)
621 result
= (char *) xrealloc (result
, result_size
);
625 result
[input_index
++] = '\0';
629 /* Variables which control command line editing and history
630 substitution. These variables are given default values at the end
632 static int command_editing_p
;
634 /* NOTE 1999-04-29: This variable will be static again, once we modify
635 gdb to use the event loop as the default command loop and we merge
636 event-top.c into this file, top.c */
638 /* static */ int history_expansion_p
;
640 static int write_history_p
;
642 show_write_history_p (struct ui_file
*file
, int from_tty
,
643 struct cmd_list_element
*c
, const char *value
)
645 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
649 static int history_size
;
651 show_history_size (struct ui_file
*file
, int from_tty
,
652 struct cmd_list_element
*c
, const char *value
)
654 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
658 static char *history_filename
;
660 show_history_filename (struct ui_file
*file
, int from_tty
,
661 struct cmd_list_element
*c
, const char *value
)
663 fprintf_filtered (file
, _("\
664 The filename in which to record the command history is \"%s\".\n"),
668 /* This is like readline(), but it has some gdb-specific behavior.
669 gdb may want readline in both the synchronous and async modes during
670 a single gdb invocation. At the ordinary top-level prompt we might
671 be using the async readline. That means we can't use
672 rl_pre_input_hook, since it doesn't work properly in async mode.
673 However, for a secondary prompt (" >", such as occurs during a
674 `define'), gdb wants a synchronous response.
676 We used to call readline() directly, running it in synchronous
677 mode. But mixing modes this way is not supported, and as of
678 readline 5.x it no longer works; the arrow keys come unbound during
679 the synchronous call. So we make a nested call into the event
680 loop. That's what gdb_readline_wrapper is for. */
682 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
683 rely on gdb_readline_wrapper_result, which might still be NULL if
684 the user types Control-D for EOF. */
685 static int gdb_readline_wrapper_done
;
687 /* The result of the current call to gdb_readline_wrapper, once a newline
689 static char *gdb_readline_wrapper_result
;
691 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
692 to be called after the newline is processed (which will redisplay
693 the prompt). But in gdb_readline_wrapper we will not get a new
694 prompt until the next call, or until we return to the event loop.
695 So we disable this hook around the newline and restore it before we
697 static void (*saved_after_char_processing_hook
) (void);
699 /* This function is called when readline has seen a complete line of
703 gdb_readline_wrapper_line (char *line
)
705 gdb_assert (!gdb_readline_wrapper_done
);
706 gdb_readline_wrapper_result
= line
;
707 gdb_readline_wrapper_done
= 1;
709 /* Prevent operate-and-get-next from acting too early. */
710 saved_after_char_processing_hook
= after_char_processing_hook
;
711 after_char_processing_hook
= NULL
;
713 /* Prevent parts of the prompt from being redisplayed if annotations
714 are enabled, and readline's state getting out of sync. */
715 if (async_command_editing_p
)
716 rl_callback_handler_remove ();
719 struct gdb_readline_wrapper_cleanup
721 void (*handler_orig
) (char *);
722 int already_prompted_orig
;
726 gdb_readline_wrapper_cleanup (void *arg
)
728 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
730 rl_already_prompted
= cleanup
->already_prompted_orig
;
732 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
733 input_handler
= cleanup
->handler_orig
;
734 gdb_readline_wrapper_result
= NULL
;
735 gdb_readline_wrapper_done
= 0;
737 after_char_processing_hook
= saved_after_char_processing_hook
;
738 saved_after_char_processing_hook
= NULL
;
744 gdb_readline_wrapper (char *prompt
)
746 struct cleanup
*back_to
;
747 struct gdb_readline_wrapper_cleanup
*cleanup
;
750 cleanup
= xmalloc (sizeof (*cleanup
));
751 cleanup
->handler_orig
= input_handler
;
752 input_handler
= gdb_readline_wrapper_line
;
754 cleanup
->already_prompted_orig
= rl_already_prompted
;
756 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
758 /* Display our prompt and prevent double prompt display. */
759 display_gdb_prompt (prompt
);
760 rl_already_prompted
= 1;
762 if (after_char_processing_hook
)
763 (*after_char_processing_hook
) ();
764 gdb_assert (after_char_processing_hook
== NULL
);
766 /* gdb_do_one_event argument is unused. */
767 while (gdb_do_one_event (NULL
) >= 0)
768 if (gdb_readline_wrapper_done
)
771 retval
= gdb_readline_wrapper_result
;
772 do_cleanups (back_to
);
781 #if STOP_SIGNAL == SIGTSTP
782 signal (SIGTSTP
, SIG_DFL
);
788 sigprocmask (SIG_SETMASK
, &zero
, 0);
790 #elif HAVE_SIGSETMASK
793 kill (getpid (), SIGTSTP
);
794 signal (SIGTSTP
, stop_sig
);
796 signal (STOP_SIGNAL
, stop_sig
);
798 printf_unfiltered ("%s", get_prompt ());
799 gdb_flush (gdb_stdout
);
801 /* Forget about any previous command -- null line now will do nothing. */
804 #endif /* STOP_SIGNAL */
806 /* Initialize signal handlers. */
808 float_handler (int signo
)
810 /* This message is based on ANSI C, section 4.7. Note that integer
811 divide by zero causes this, so "float" is a misnomer. */
812 signal (SIGFPE
, float_handler
);
813 error (_("Erroneous arithmetic operation."));
817 do_nothing (int signo
)
819 /* Under System V the default disposition of a signal is reinstated after
820 the signal is caught and delivered to an application process. On such
821 systems one must restore the replacement signal handler if one wishes
822 to continue handling the signal in one's program. On BSD systems this
823 is not needed but it is harmless, and it simplifies the code to just do
824 it unconditionally. */
825 signal (signo
, do_nothing
);
828 /* The current saved history number from operate-and-get-next.
829 This is -1 if not valid. */
830 static int operate_saved_history
= -1;
832 /* This is put on the appropriate hook and helps operate-and-get-next
835 gdb_rl_operate_and_get_next_completion (void)
837 int delta
= where_history () - operate_saved_history
;
838 /* The `key' argument to rl_get_previous_history is ignored. */
839 rl_get_previous_history (delta
, 0);
840 operate_saved_history
= -1;
842 /* readline doesn't automatically update the display for us. */
845 after_char_processing_hook
= NULL
;
846 rl_pre_input_hook
= NULL
;
849 /* This is a gdb-local readline command handler. It accepts the
850 current command line (like RET does) and, if this command was taken
851 from the history, arranges for the next command in the history to
852 appear on the command line when the prompt returns.
853 We ignore the arguments. */
855 gdb_rl_operate_and_get_next (int count
, int key
)
859 /* Use the async hook. */
860 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
862 /* Find the current line, and find the next line to use. */
863 where
= where_history();
865 /* FIXME: kettenis/20020817: max_input_history is renamed into
866 history_max_entries in readline-4.2. When we do a new readline
867 import, we should probably change it here too, even though
868 readline maintains backwards compatibility for now by still
869 defining max_input_history. */
870 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
871 (where
>= history_length
- 1))
872 operate_saved_history
= where
;
874 operate_saved_history
= where
+ 1;
876 return rl_newline (1, key
);
879 /* Read one line from the command input stream `instream'
880 into the local static buffer `linebuffer' (whose current length
882 The buffer is made bigger as necessary.
883 Returns the address of the start of the line.
885 NULL is returned for end of file.
887 *If* the instream == stdin & stdin is a terminal, the line read
888 is copied into the file line saver (global var char *line,
889 length linesize) so that it can be duplicated.
891 This routine either uses fancy command line editing or
892 simple input as the user has requested. */
895 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
897 static char *linebuffer
= 0;
898 static unsigned linelength
= 0;
902 char *local_prompt
= prompt_arg
;
906 /* The annotation suffix must be non-NULL. */
907 if (annotation_suffix
== NULL
)
908 annotation_suffix
= "";
910 if (annotation_level
> 1 && instream
== stdin
)
912 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
913 + strlen (annotation_suffix
) + 40);
914 if (prompt_arg
== NULL
)
915 local_prompt
[0] = '\0';
917 strcpy (local_prompt
, prompt_arg
);
918 strcat (local_prompt
, "\n\032\032");
919 strcat (local_prompt
, annotation_suffix
);
920 strcat (local_prompt
, "\n");
926 linebuffer
= (char *) xmalloc (linelength
);
931 /* Control-C quits instantly if typed while in this loop
932 since it should not wait until the user types a newline. */
936 signal (STOP_SIGNAL
, handle_stop_sig
);
941 /* Make sure that all output has been output. Some machines may let
942 you get away with leaving out some of the gdb_flush, but not all. */
944 gdb_flush (gdb_stdout
);
945 gdb_flush (gdb_stderr
);
947 if (source_file_name
!= NULL
)
948 ++source_line_number
;
950 if (annotation_level
> 1 && instream
== stdin
)
952 puts_unfiltered ("\n\032\032pre-");
953 puts_unfiltered (annotation_suffix
);
954 puts_unfiltered ("\n");
957 /* Don't use fancy stuff if not talking to stdin. */
958 if (deprecated_readline_hook
&& input_from_terminal_p ())
960 rl
= (*deprecated_readline_hook
) (local_prompt
);
962 else if (command_editing_p
&& input_from_terminal_p ())
964 rl
= gdb_readline_wrapper (local_prompt
);
968 rl
= gdb_readline (local_prompt
);
971 if (annotation_level
> 1 && instream
== stdin
)
973 puts_unfiltered ("\n\032\032post-");
974 puts_unfiltered (annotation_suffix
);
975 puts_unfiltered ("\n");
978 if (!rl
|| rl
== (char *) EOF
)
983 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
985 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
986 nline
= (char *) xrealloc (linebuffer
, linelength
);
987 p
+= nline
- linebuffer
;
991 /* Copy line. Don't copy null at end. (Leaves line alone
992 if this was just a newline) */
996 xfree (rl
); /* Allocated in readline. */
998 if (p
== linebuffer
|| *(p
- 1) != '\\')
1001 p
--; /* Put on top of '\'. */
1002 local_prompt
= (char *) 0;
1007 signal (STOP_SIGNAL
, SIG_DFL
);
1014 #define SERVER_COMMAND_LENGTH 7
1016 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1017 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1020 /* Note that we don't set `line'. Between this and the check in
1021 dont_repeat, this insures that repeating will still do the
1024 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1027 /* Do history expansion if that is wished. */
1028 if (history_expansion_p
&& instream
== stdin
1029 && ISATTY (instream
))
1031 char *history_value
;
1034 *p
= '\0'; /* Insert null now. */
1035 expanded
= history_expand (linebuffer
, &history_value
);
1038 /* Print the changes. */
1039 printf_unfiltered ("%s\n", history_value
);
1041 /* If there was an error, call this function again. */
1044 xfree (history_value
);
1045 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1047 if (strlen (history_value
) > linelength
)
1049 linelength
= strlen (history_value
) + 1;
1050 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1052 strcpy (linebuffer
, history_value
);
1053 p
= linebuffer
+ strlen (linebuffer
);
1055 xfree (history_value
);
1058 /* If we just got an empty line, and that is supposed
1059 to repeat the previous command, return the value in the
1061 if (repeat
&& p
== linebuffer
)
1063 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1069 /* Add line to history if appropriate. */
1070 if (instream
== stdin
1071 && ISATTY (stdin
) && *linebuffer
)
1072 add_history (linebuffer
);
1074 /* Note: lines consisting solely of comments are added to the command
1075 history. This is useful when you type a command, and then
1076 realize you don't want to execute it quite yet. You can comment
1077 out the command and then later fetch it from the value history
1078 and remove the '#'. The kill ring is probably better, but some
1079 people are in the habit of commenting things out. */
1081 *p1
= '\0'; /* Found a comment. */
1083 /* Save into global buffer if appropriate. */
1086 if (linelength
> linesize
)
1088 line
= xrealloc (line
, linelength
);
1089 linesize
= linelength
;
1091 strcpy (line
, linebuffer
);
1098 /* Print the GDB banner. */
1100 print_gdb_version (struct ui_file
*stream
)
1102 /* From GNU coding standards, first line is meant to be easy for a
1103 program to parse, and is just canonical program name and version
1104 number, which starts after last space. */
1106 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1108 /* Second line is a copyright notice. */
1110 fprintf_filtered (stream
, "Copyright (C) 2009 Free Software Foundation, Inc.\n");
1112 /* Following the copyright is a brief statement that the program is
1113 free software, that users are free to copy and change it on
1114 certain conditions, that it is covered by the GNU GPL, and that
1115 there is no warranty. */
1117 fprintf_filtered (stream
, "\
1118 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1119 This is free software: you are free to change and redistribute it.\n\
1120 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1121 and \"show warranty\" for details.\n");
1123 /* After the required info we print the configuration information. */
1125 fprintf_filtered (stream
, "This GDB was configured as \"");
1126 if (strcmp (host_name
, target_name
) != 0)
1128 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1132 fprintf_filtered (stream
, "%s", host_name
);
1134 fprintf_filtered (stream
, "\".");
1136 if (REPORT_BUGS_TO
[0])
1138 fprintf_filtered (stream
,
1139 _("\nFor bug reporting instructions, please see:\n"));
1140 fprintf_filtered (stream
, "%s.", REPORT_BUGS_TO
);
1144 /* get_prompt: access method for the GDB prompt string. */
1153 set_prompt (char *s
)
1155 /* ??rehrauer: I don't know why this fails, since it looks as though
1156 assignments to prompt are wrapped in calls to xstrdup...
1160 PROMPT (0) = xstrdup (s
);
1170 /* Callback for iterate_over_inferiors. Kills or detaches the given
1171 inferior, depending on how we originally gained control of it. */
1174 kill_or_detach (struct inferior
*inf
, void *args
)
1176 struct qt_args
*qt
= args
;
1177 struct thread_info
*thread
;
1179 thread
= any_thread_of_process (inf
->pid
);
1182 switch_to_thread (thread
->ptid
);
1184 /* Leave core files alone. */
1185 if (target_has_execution
)
1187 if (inf
->attach_flag
)
1188 target_detach (qt
->args
, qt
->from_tty
);
1197 /* Callback for iterate_over_inferiors. Prints info about what GDB
1198 will do to each inferior on a "quit". ARG points to a struct
1199 ui_out where output is to be collected. */
1202 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1204 struct ui_file
*stb
= arg
;
1206 if (inf
->attach_flag
)
1207 fprintf_filtered (stb
,
1208 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1209 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1211 fprintf_filtered (stb
,
1212 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1213 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1218 /* If necessary, make the user confirm that we should quit. Return
1219 non-zero if we should quit, zero if we shouldn't. */
1224 struct ui_file
*stb
;
1225 struct cleanup
*old_chain
;
1229 /* Don't even ask if we're only debugging a core file inferior. */
1230 if (!have_live_inferiors ())
1233 /* Build the query string as a single string. */
1234 stb
= mem_fileopen ();
1235 old_chain
= make_cleanup_ui_file_delete (stb
);
1237 /* This is something of a hack. But there's no reliable way to see
1238 if a GUI is running. The `use_windows' variable doesn't cut
1240 if (deprecated_init_ui_hook
)
1241 fprintf_filtered (stb
, _("A debugging session is active.\n"
1242 "Do you still want to close the debugger?"));
1245 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1246 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1247 fprintf_filtered (stb
, _("\nQuit anyway? "));
1250 str
= ui_file_xstrdup (stb
, NULL
);
1251 make_cleanup (xfree
, str
);
1253 qr
= query ("%s", str
);
1254 do_cleanups (old_chain
);
1258 /* Helper routine for quit_force that requires error handling. */
1261 quit_target (void *arg
)
1263 struct qt_args
*qt
= (struct qt_args
*)arg
;
1265 /* Kill or detach all inferiors. */
1266 iterate_over_inferiors (kill_or_detach
, qt
);
1268 /* Give all pushed targets a chance to do minimal cleanup, and pop
1270 pop_all_targets (1);
1272 /* Save the history information if it is appropriate to do so. */
1273 if (write_history_p
&& history_filename
)
1274 write_history (history_filename
);
1276 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1281 /* Quit without asking for confirmation. */
1284 quit_force (char *args
, int from_tty
)
1289 /* An optional expression may be used to cause gdb to terminate with the
1290 value of that expression. */
1293 struct value
*val
= parse_and_eval (args
);
1295 exit_code
= (int) value_as_long (val
);
1297 else if (return_child_result
)
1298 exit_code
= return_child_result_value
;
1301 qt
.from_tty
= from_tty
;
1303 /* We want to handle any quit errors and exit regardless. */
1304 catch_errors (quit_target
, &qt
,
1305 "Quitting: ", RETURN_MASK_ALL
);
1310 /* Returns whether GDB is running on a terminal and input is
1311 currently coming from that terminal. */
1314 input_from_terminal_p (void)
1316 if (gdb_has_a_terminal () && instream
== stdin
)
1319 /* If INSTREAM is unset, and we are not in a user command, we
1320 must be in Insight. That's like having a terminal, for our
1322 if (instream
== NULL
&& !in_user_command
)
1329 dont_repeat_command (char *ignored
, int from_tty
)
1331 *line
= 0; /* Can't call dont_repeat here because we're not
1332 necessarily reading from stdin. */
1335 /* Functions to manipulate command line editing control variables. */
1337 /* Number of commands to print in each call to show_commands. */
1338 #define Hist_print 10
1340 show_commands (char *args
, int from_tty
)
1342 /* Index for history commands. Relative to history_base. */
1345 /* Number of the history entry which we are planning to display next.
1346 Relative to history_base. */
1349 /* The first command in the history which doesn't exist (i.e. one more
1350 than the number of the last command). Relative to history_base. */
1353 /* Print out some of the commands from the command history. */
1354 /* First determine the length of the history list. */
1355 hist_len
= history_size
;
1356 for (offset
= 0; offset
< history_size
; offset
++)
1358 if (!history_get (history_base
+ offset
))
1367 if (args
[0] == '+' && args
[1] == '\0')
1368 /* "info editing +" should print from the stored position. */
1371 /* "info editing <exp>" should print around command number <exp>. */
1372 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1374 /* "show commands" means print the last Hist_print commands. */
1377 num
= hist_len
- Hist_print
;
1383 /* If there are at least Hist_print commands, we want to display the last
1384 Hist_print rather than, say, the last 6. */
1385 if (hist_len
- num
< Hist_print
)
1387 num
= hist_len
- Hist_print
;
1392 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1394 printf_filtered ("%5d %s\n", history_base
+ offset
,
1395 (history_get (history_base
+ offset
))->line
);
1398 /* The next command we want to display is the next one that we haven't
1402 /* If the user repeats this command with return, it should do what
1403 "show commands +" does. This is unnecessary if arg is null,
1404 because "show commands +" is not useful after "show commands". */
1405 if (from_tty
&& args
)
1412 /* Called by do_setshow_command. */
1414 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1416 if (history_size
== INT_MAX
)
1417 unstifle_history ();
1418 else if (history_size
>= 0)
1419 stifle_history (history_size
);
1422 history_size
= INT_MAX
;
1423 error (_("History size must be non-negative"));
1428 set_history (char *args
, int from_tty
)
1430 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1431 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1435 show_history (char *args
, int from_tty
)
1437 cmd_show_list (showhistlist
, from_tty
, "");
1440 int info_verbose
= 0; /* Default verbose msgs off */
1442 /* Called by do_setshow_command. An elaborate joke. */
1444 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1446 char *cmdname
= "verbose";
1447 struct cmd_list_element
*showcmd
;
1449 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1453 c
->doc
= "Set verbose printing of informational messages.";
1454 showcmd
->doc
= "Show verbose printing of informational messages.";
1458 c
->doc
= "Set verbosity.";
1459 showcmd
->doc
= "Show verbosity.";
1463 /* Init the history buffer. Note that we are called after the init file(s)
1464 * have been read so that the user can change the history file via his
1465 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1466 * overrides all of this.
1474 tmpenv
= getenv ("HISTSIZE");
1476 history_size
= atoi (tmpenv
);
1477 else if (!history_size
)
1480 stifle_history (history_size
);
1482 tmpenv
= getenv ("GDBHISTFILE");
1484 history_filename
= xstrdup (tmpenv
);
1485 else if (!history_filename
)
1487 /* We include the current directory so that if the user changes
1488 directories the file written will be the same as the one
1491 /* No leading dots in file names are allowed on MSDOS. */
1492 history_filename
= concat (current_directory
, "/_gdb_history",
1495 history_filename
= concat (current_directory
, "/.gdb_history",
1499 read_history (history_filename
);
1503 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1504 struct cmd_list_element
*c
, const char *value
)
1506 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1510 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1511 struct cmd_list_element
*c
, const char *value
)
1513 fprintf_filtered (file
, _("\
1514 Editing of command lines as they are typed is %s.\n"),
1519 show_annotation_level (struct ui_file
*file
, int from_tty
,
1520 struct cmd_list_element
*c
, const char *value
)
1522 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1526 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1527 struct cmd_list_element
*c
, const char *value
)
1529 fprintf_filtered (file
, _("\
1530 Notification of completion for asynchronous execution commands is %s.\n"),
1536 struct cmd_list_element
*c
;
1538 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1539 whatever the DEFAULT_PROMPT is. */
1540 the_prompts
.top
= 0;
1542 PROMPT (0) = xstrdup (DEFAULT_PROMPT
);
1544 /* Set things up for annotation_level > 1, if the user ever decides
1546 async_annotation_suffix
= "prompt";
1547 /* Set the variable associated with the setshow prompt command. */
1548 new_async_prompt
= xstrdup (PROMPT (0));
1550 /* If gdb was started with --annotate=2, this is equivalent to the
1551 user entering the command 'set annotate 2' at the gdb prompt, so
1552 we need to do extra processing. */
1553 if (annotation_level
> 1)
1554 set_async_annotation_level (NULL
, 0, NULL
);
1556 /* Set the important stuff up for command editing. */
1557 command_editing_p
= 1;
1558 history_expansion_p
= 0;
1559 write_history_p
= 0;
1561 /* Setup important stuff for command line editing. */
1562 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1563 rl_completion_entry_function
= readline_line_completion_function
;
1564 rl_completer_word_break_characters
= default_word_break_characters ();
1565 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1566 rl_readline_name
= "gdb";
1567 rl_terminal_name
= getenv ("TERM");
1569 /* The name for this defun comes from Bash, where it originated.
1570 15 is Control-o, the same binding this function has in Bash. */
1571 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1573 add_setshow_string_cmd ("prompt", class_support
,
1574 &new_async_prompt
, _("\
1575 Set gdb's prompt"), _("\
1576 Show gdb's prompt"), NULL
,
1578 show_new_async_prompt
,
1579 &setlist
, &showlist
);
1581 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1582 Don't repeat this command.\n\
1583 Primarily used inside of user-defined commands that should not be repeated when\n\
1586 add_setshow_boolean_cmd ("editing", class_support
,
1587 &async_command_editing_p
, _("\
1588 Set editing of command lines as they are typed."), _("\
1589 Show editing of command lines as they are typed."), _("\
1590 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1591 Without an argument, command line editing is enabled. To edit, use\n\
1592 EMACS-like or VI-like commands like control-P or ESC."),
1593 set_async_editing_command
,
1594 show_async_command_editing_p
,
1595 &setlist
, &showlist
);
1597 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1598 Set saving of the history record on exit."), _("\
1599 Show saving of the history record on exit."), _("\
1600 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1601 Without an argument, saving is enabled."),
1603 show_write_history_p
,
1604 &sethistlist
, &showhistlist
);
1606 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1607 Set the size of the command history,"), _("\
1608 Show the size of the command history,"), _("\
1609 ie. the number of previous commands to keep a record of."),
1610 set_history_size_command
,
1612 &sethistlist
, &showhistlist
);
1614 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1615 Set the filename in which to record the command history"), _("\
1616 Show the filename in which to record the command history"), _("\
1617 (the list of previous commands of which a record is kept)."),
1619 show_history_filename
,
1620 &sethistlist
, &showhistlist
);
1622 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1623 Set whether to confirm potentially dangerous operations."), _("\
1624 Show whether to confirm potentially dangerous operations."), NULL
,
1627 &setlist
, &showlist
);
1629 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1630 Set annotation_level."), _("\
1631 Show annotation_level."), _("\
1632 0 == normal; 1 == fullname (for use when running under emacs)\n\
1633 2 == output annotated suitably for use by programs that control GDB."),
1634 set_async_annotation_level
,
1635 show_annotation_level
,
1636 &setlist
, &showlist
);
1638 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1639 &exec_done_display_p
, _("\
1640 Set notification of completion for asynchronous execution commands."), _("\
1641 Show notification of completion for asynchronous execution commands."), _("\
1642 Use \"on\" to enable the notification, and \"off\" to disable it."),
1644 show_exec_done_display_p
,
1645 &setlist
, &showlist
);
1647 add_setshow_filename_cmd ("data-directory", class_maintenance
,
1648 &gdb_datadir
, _("Set GDB's data directory."),
1649 _("Show GDB's data directory."),
1651 When set, GDB uses the specified path to search for data files."),
1658 gdb_init (char *argv0
)
1660 if (pre_init_ui_hook
)
1661 pre_init_ui_hook ();
1663 /* Run the init function of each source file */
1666 /* Make sure we return to the original directory upon exit, come
1667 what may, since the OS doesn't do that for us. */
1668 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1671 init_cmd_lists (); /* This needs to be done first */
1672 initialize_targets (); /* Setup target_terminal macros for utils.c */
1673 initialize_utils (); /* Make errors and warnings possible */
1674 initialize_all_files ();
1675 initialize_current_architecture ();
1677 init_main (); /* But that omits this file! Do it now */
1679 initialize_stdin_serial ();
1681 async_init_signals ();
1683 /* We need a default language for parsing expressions, so simple things like
1684 "set width 0" won't fail if no language is explicitly set in a config file
1685 or implicitly set by reading an executable during startup. */
1686 set_language (language_c
);
1687 expected_language
= current_language
; /* don't warn about the change. */
1689 /* Allow another UI to initialize. If the UI fails to initialize,
1690 and it wants GDB to revert to the CLI, it should clear
1691 deprecated_init_ui_hook. */
1692 if (deprecated_init_ui_hook
)
1693 deprecated_init_ui_hook (argv0
);