1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "cli/cli-cmds.h"
23 #include "cli/cli-script.h"
24 #include "cli/cli-setshow.h"
25 #include "cli/cli-decode.h"
31 #include "target-dcache.h"
32 #include "breakpoint.h"
34 #include "expression.h"
37 #include "terminal.h" /* For job_control. */
39 #include "completer.h"
45 #include "event-loop.h"
46 #include "gdbthread.h"
47 #include "extension.h"
51 #include "filenames.h"
54 /* readline include files. */
55 #include "readline/readline.h"
56 #include "readline/history.h"
58 /* readline defines this. */
61 #include <sys/types.h>
63 #include "event-top.h"
68 #include "tracepoint.h"
75 extern void initialize_all_files (void);
77 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
78 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
79 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
81 /* Default command line prompt. This is overriden in some configs. */
83 #ifndef DEFAULT_PROMPT
84 #define DEFAULT_PROMPT "(gdb) "
87 /* Initialization file name for gdb. This is host-dependent. */
89 const char gdbinit
[] = GDBINIT
;
91 int inhibit_gdbinit
= 0;
93 extern char lang_frame_mismatch_warn
[]; /* language.c */
95 /* Flag for whether we want to confirm potentially dangerous
96 operations. Default is yes. */
101 show_confirm (struct ui_file
*file
, int from_tty
,
102 struct cmd_list_element
*c
, const char *value
)
104 fprintf_filtered (file
, _("Whether to confirm potentially "
105 "dangerous operations is %s.\n"),
109 /* stdio stream that command input is being read from. Set to stdin
110 normally. Set by source_command to the file we are sourcing. Set
111 to NULL if we are executing a user-defined command or interacting
116 /* Flag to indicate whether a user defined command is currently running. */
120 /* Current working directory. */
122 char *current_directory
;
124 /* The directory name is actually stored here (usually). */
125 char gdb_dirbuf
[1024];
127 /* Function to call before reading a command, if nonzero.
128 The function receives two args: an input stream,
129 and a prompt string. */
131 void (*window_hook
) (FILE *, char *);
133 /* Buffer used for reading command lines, and the size
134 allocated for it so far. */
136 char *saved_command_line
;
137 int saved_command_line_size
= 100;
139 /* Nonzero if the current command is modified by "server ". This
140 affects things like recording into the command history, commands
141 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
142 whatever) can issue its own commands and also send along commands
143 from the user, and have the user not notice that the user interface
144 is issuing commands too. */
147 /* Timeout limit for response from target. */
149 /* The default value has been changed many times over the years. It
150 was originally 5 seconds. But that was thought to be a long time
151 to sit and wait, so it was changed to 2 seconds. That was thought
152 to be plenty unless the connection was going through some terminal
153 server or multiplexer or other form of hairy serial connection.
155 In mid-1996, remote_timeout was moved from remote.c to top.c and
156 it began being used in other remote-* targets. It appears that the
157 default was changed to 20 seconds at that time, perhaps because the
158 Renesas E7000 ICE didn't always respond in a timely manner.
160 But if 5 seconds is a long time to sit and wait for retransmissions,
161 20 seconds is far worse. This demonstrates the difficulty of using
162 a single variable for all protocol timeouts.
164 As remote.c is used much more than remote-e7000.c, it was changed
165 back to 2 seconds in 1999. */
167 int remote_timeout
= 2;
169 /* Non-zero tells remote* modules to output debugging info. */
171 int remote_debug
= 0;
173 /* Sbrk location on entry to main. Used for statistics only. */
178 /* Hooks for alternate command interfaces. */
180 /* This hook is called from within gdb's many mini-event loops which
181 could steal control from a real user interface's event loop. It
182 returns non-zero if the user is requesting a detach, zero
185 int (*deprecated_ui_loop_hook
) (int);
188 /* Called from print_frame_info to list the line we stopped in. */
190 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
,
194 /* Replaces most of query. */
196 int (*deprecated_query_hook
) (const char *, va_list);
198 /* Replaces most of warning. */
200 void (*deprecated_warning_hook
) (const char *, va_list);
202 /* These three functions support getting lines of text from the user.
203 They are used in sequence. First deprecated_readline_begin_hook is
204 called with a text string that might be (for example) a message for
205 the user to type in a sequence of commands to be executed at a
206 breakpoint. If this function calls back to a GUI, it might take
207 this opportunity to pop up a text interaction window with this
208 message. Next, deprecated_readline_hook is called with a prompt
209 that is emitted prior to collecting the user input. It can be
210 called multiple times. Finally, deprecated_readline_end_hook is
211 called to notify the GUI that we are done with the interaction
212 window and it can close it. */
214 void (*deprecated_readline_begin_hook
) (char *, ...);
215 char *(*deprecated_readline_hook
) (const char *);
216 void (*deprecated_readline_end_hook
) (void);
218 /* Called as appropriate to notify the interface that we have attached
219 to or detached from an already running process. */
221 void (*deprecated_attach_hook
) (void);
222 void (*deprecated_detach_hook
) (void);
224 /* Called during long calculations to allow GUI to repair window
225 damage, and to check for stop buttons, etc... */
227 void (*deprecated_interactive_hook
) (void);
229 /* Called when going to wait for the target. Usually allows the GUI
230 to run while waiting for target events. */
232 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
233 struct target_waitstatus
*status
,
236 /* Used by UI as a wrapper around command execution. May do various
237 things like enabling/disabling buttons, etc... */
239 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
,
240 char *cmd
, int from_tty
);
242 /* Called when the current thread changes. Argument is thread id. */
244 void (*deprecated_context_hook
) (int id
);
246 /* Handler for SIGHUP. */
249 /* NOTE 1999-04-29: This function will be static again, once we modify
250 gdb to use the event loop as the default command loop and we merge
251 event-top.c into this file, top.c. */
255 /* Stop asking user for confirmation --- we're exiting. This
256 prevents asking the user dumb questions. */
258 quit_command ((char *) 0, 0);
260 #endif /* defined SIGHUP */
262 /* Line number we are currently in, in a file which is being sourced. */
263 /* NOTE 1999-04-29: This variable will be static again, once we modify
264 gdb to use the event loop as the default command loop and we merge
265 event-top.c into this file, top.c. */
266 /* static */ int source_line_number
;
268 /* Name of the file we are sourcing. */
269 /* NOTE 1999-04-29: This variable will be static again, once we modify
270 gdb to use the event loop as the default command loop and we merge
271 event-top.c into this file, top.c. */
272 /* static */ const char *source_file_name
;
274 /* Clean up on error during a "source" command (or execution of a
275 user-defined command). */
278 do_restore_instream_cleanup (void *stream
)
280 /* Restore the previous input stream. */
284 /* Read commands from STREAM. */
286 read_command_file (FILE *stream
)
288 struct cleanup
*cleanups
;
290 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
293 do_cleanups (cleanups
);
296 void (*pre_init_ui_hook
) (void);
300 do_chdir_cleanup (void *old_dir
)
308 prepare_execute_command (void)
311 struct cleanup
*cleanup
;
313 mark
= value_mark ();
314 cleanup
= make_cleanup_value_free_to_mark (mark
);
316 /* With multiple threads running while the one we're examining is
317 stopped, the dcache can get stale without us being able to detect
318 it. For the duration of the command, though, use the dcache to
319 help things like backtrace. */
321 target_dcache_invalidate ();
326 /* Tell the user if the language has changed (except first time) after
327 executing a command. */
330 check_frame_language_change (void)
332 static int warned
= 0;
333 struct frame_info
*frame
;
335 /* First make sure that a new frame has been selected, in case the
336 command or the hooks changed the program state. */
337 frame
= deprecated_safe_get_selected_frame ();
338 if (current_language
!= expected_language
)
340 if (language_mode
== language_mode_auto
&& info_verbose
)
342 language_info (1); /* Print what changed. */
347 /* Warn the user if the working language does not match the language
348 of the current frame. Only warn the user if we are actually
349 running the program, i.e. there is a stack. */
350 /* FIXME: This should be cacheing the frame and only running when
351 the frame changes. */
353 if (has_stack_frames ())
357 flang
= get_frame_language (frame
);
359 && flang
!= language_unknown
360 && flang
!= current_language
->la_language
)
362 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
371 wait_sync_command_done (void)
373 while (gdb_do_one_event () >= 0)
381 maybe_wait_sync_command_done (int was_sync
)
383 /* If the interpreter is in sync mode (we're running a user
384 command's list, running command hooks or similars), and we
385 just ran a synchronous command that started the target, wait
386 for that command to end. */
387 if (!interpreter_async
&& !was_sync
&& sync_execution
)
388 wait_sync_command_done ();
391 /* Execute the line P as a command, in the current user context.
392 Pass FROM_TTY as second argument to the defining function. */
395 execute_command (char *p
, int from_tty
)
397 struct cleanup
*cleanup_if_error
, *cleanup
;
398 struct cmd_list_element
*c
;
401 cleanup_if_error
= make_bpstat_clear_actions_cleanup ();
402 cleanup
= prepare_execute_command ();
404 /* Force cleanup of any alloca areas if using C alloca instead of
408 /* This can happen when command_line_input hits end of file. */
411 do_cleanups (cleanup
);
412 discard_cleanups (cleanup_if_error
);
416 target_log_command (p
);
418 while (*p
== ' ' || *p
== '\t')
424 int was_sync
= sync_execution
;
428 /* If trace-commands is set then this will print this command. */
429 print_command_trace (p
);
431 c
= lookup_cmd (&cmd
, cmdlist
, "", 0, 1);
434 /* Pass null arg rather than an empty one. */
437 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
438 while the is_complete_command(cfunc) test is just plain
439 bogus. They should both be replaced by a test of the form
440 c->strip_trailing_white_space_p. */
441 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
442 can't be replaced with func. This is because it is the
443 cfunc, and not the func, that has the value that the
444 is_complete_command hack is testing for. */
445 /* Clear off trailing whitespace, except for set and complete
448 && c
->type
!= set_cmd
449 && !is_complete_command (c
))
451 p
= arg
+ strlen (arg
) - 1;
452 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
457 /* If this command has been pre-hooked, run the hook first. */
458 execute_cmd_pre_hook (c
);
460 if (c
->deprecated_warn_user
)
461 deprecated_cmd_warning (line
);
463 /* c->user_commands would be NULL in the case of a python command. */
464 if (c
->theclass
== class_user
&& c
->user_commands
)
465 execute_user_command (c
, arg
);
466 else if (c
->type
== set_cmd
)
467 do_set_command (arg
, from_tty
, c
);
468 else if (c
->type
== show_cmd
)
469 do_show_command (arg
, from_tty
, c
);
470 else if (!cmd_func_p (c
))
471 error (_("That is not a command, just a help topic."));
472 else if (deprecated_call_command_hook
)
473 deprecated_call_command_hook (c
, arg
, from_tty
);
475 cmd_func (c
, arg
, from_tty
);
477 maybe_wait_sync_command_done (was_sync
);
479 /* If this command has been post-hooked, run the hook last. */
480 execute_cmd_post_hook (c
);
484 check_frame_language_change ();
486 do_cleanups (cleanup
);
487 discard_cleanups (cleanup_if_error
);
490 /* Run execute_command for P and FROM_TTY. Capture its output into the
491 returned string, do not display it to the screen. BATCH_FLAG will be
492 temporarily set to true. */
495 execute_command_to_string (char *p
, int from_tty
)
497 struct ui_file
*str_file
;
498 struct cleanup
*cleanup
;
501 /* GDB_STDOUT should be better already restored during these
502 restoration callbacks. */
503 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
505 make_cleanup_restore_integer (&interpreter_async
);
506 interpreter_async
= 0;
508 str_file
= mem_fileopen ();
510 make_cleanup_ui_file_delete (str_file
);
511 make_cleanup_restore_ui_file (&gdb_stdout
);
512 make_cleanup_restore_ui_file (&gdb_stderr
);
513 make_cleanup_restore_ui_file (&gdb_stdlog
);
514 make_cleanup_restore_ui_file (&gdb_stdtarg
);
515 make_cleanup_restore_ui_file (&gdb_stdtargerr
);
517 if (ui_out_redirect (current_uiout
, str_file
) < 0)
518 warning (_("Current output protocol does not support redirection"));
520 make_cleanup_ui_out_redirect_pop (current_uiout
);
522 gdb_stdout
= str_file
;
523 gdb_stderr
= str_file
;
524 gdb_stdlog
= str_file
;
525 gdb_stdtarg
= str_file
;
526 gdb_stdtargerr
= str_file
;
528 execute_command (p
, from_tty
);
530 retval
= ui_file_xstrdup (str_file
, NULL
);
532 do_cleanups (cleanup
);
537 /* Read commands from `instream' and execute them
538 until end of file or error reading instream. */
543 struct cleanup
*old_chain
;
545 int stdin_is_tty
= ISATTY (stdin
);
547 while (instream
&& !feof (instream
))
549 if (window_hook
&& instream
== stdin
)
550 (*window_hook
) (instream
, get_prompt ());
553 if (instream
== stdin
&& stdin_is_tty
)
554 reinitialize_more_filter ();
555 old_chain
= make_cleanup (null_cleanup
, 0);
557 /* Get a command-line. This calls the readline package. */
558 command
= command_line_input (instream
== stdin
?
559 get_prompt () : (char *) NULL
,
560 instream
== stdin
, "prompt");
563 do_cleanups (old_chain
);
567 make_command_stats_cleanup (1);
569 /* Do not execute commented lines. */
570 if (command
[0] != '#')
572 execute_command (command
, instream
== stdin
);
574 /* Do any commands attached to breakpoint we are stopped at. */
575 bpstat_do_actions ();
577 do_cleanups (old_chain
);
581 /* When nonzero, cause dont_repeat to do nothing. This should only be
582 set via prevent_dont_repeat. */
584 static int suppress_dont_repeat
= 0;
586 /* Commands call this if they do not want to be repeated by null lines. */
591 if (suppress_dont_repeat
|| server_command
)
594 /* If we aren't reading from standard input, we are saving the last
595 thing read from stdin in line and don't want to delete it. Null
596 lines won't repeat here in any case. */
597 if (instream
== stdin
)
598 *saved_command_line
= 0;
601 /* Prevent dont_repeat from working, and return a cleanup that
602 restores the previous state. */
605 prevent_dont_repeat (void)
607 struct cleanup
*result
= make_cleanup_restore_integer (&suppress_dont_repeat
);
609 suppress_dont_repeat
= 1;
614 /* Read a line from the stream "instream" without command line editing.
616 It prints PROMPT_ARG once at the start.
617 Action is compatible with "readline", e.g. space for the result is
618 malloc'd and should be freed by the caller.
620 A NULL return means end of file. */
622 gdb_readline (const char *prompt_arg
)
627 int result_size
= 80;
631 /* Don't use a _filtered function here. It causes the assumed
632 character position to be off, since the newline we read from
633 the user is not accounted for. */
634 fputs_unfiltered (prompt_arg
, gdb_stdout
);
635 gdb_flush (gdb_stdout
);
638 result
= (char *) xmalloc (result_size
);
642 /* Read from stdin if we are executing a user defined command.
643 This is the right thing for prompt_for_continue, at least. */
644 c
= fgetc (instream
? instream
: stdin
);
649 /* The last line does not end with a newline. Return it, and
650 if we are called again fgetc will still return EOF and
651 we'll return NULL then. */
659 if (input_index
> 0 && result
[input_index
- 1] == '\r')
664 result
[input_index
++] = c
;
665 while (input_index
>= result_size
)
668 result
= (char *) xrealloc (result
, result_size
);
672 result
[input_index
++] = '\0';
676 /* Variables which control command line editing and history
677 substitution. These variables are given default values at the end
679 static int command_editing_p
;
681 /* NOTE 1999-04-29: This variable will be static again, once we modify
682 gdb to use the event loop as the default command loop and we merge
683 event-top.c into this file, top.c. */
685 /* static */ int history_expansion_p
;
687 static int write_history_p
;
689 show_write_history_p (struct ui_file
*file
, int from_tty
,
690 struct cmd_list_element
*c
, const char *value
)
692 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
696 /* The variable associated with the "set/show history size"
697 command. The value -1 means unlimited, and -2 means undefined. */
698 static int history_size_setshow_var
= -2;
701 show_history_size (struct ui_file
*file
, int from_tty
,
702 struct cmd_list_element
*c
, const char *value
)
704 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
708 /* Variable associated with the "history remove-duplicates" option.
709 The value -1 means unlimited. */
710 static int history_remove_duplicates
= 0;
713 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
714 struct cmd_list_element
*c
, const char *value
)
716 fprintf_filtered (file
,
717 _("The number of history entries to look back at for "
718 "duplicates is %s.\n"),
722 static char *history_filename
;
724 show_history_filename (struct ui_file
*file
, int from_tty
,
725 struct cmd_list_element
*c
, const char *value
)
727 fprintf_filtered (file
, _("The filename in which to record "
728 "the command history is \"%s\".\n"),
732 /* This is like readline(), but it has some gdb-specific behavior.
733 gdb may want readline in both the synchronous and async modes during
734 a single gdb invocation. At the ordinary top-level prompt we might
735 be using the async readline. That means we can't use
736 rl_pre_input_hook, since it doesn't work properly in async mode.
737 However, for a secondary prompt (" >", such as occurs during a
738 `define'), gdb wants a synchronous response.
740 We used to call readline() directly, running it in synchronous
741 mode. But mixing modes this way is not supported, and as of
742 readline 5.x it no longer works; the arrow keys come unbound during
743 the synchronous call. So we make a nested call into the event
744 loop. That's what gdb_readline_wrapper is for. */
746 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
747 rely on gdb_readline_wrapper_result, which might still be NULL if
748 the user types Control-D for EOF. */
749 static int gdb_readline_wrapper_done
;
751 /* The result of the current call to gdb_readline_wrapper, once a newline
753 static char *gdb_readline_wrapper_result
;
755 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
756 to be called after the newline is processed (which will redisplay
757 the prompt). But in gdb_readline_wrapper we will not get a new
758 prompt until the next call, or until we return to the event loop.
759 So we disable this hook around the newline and restore it before we
761 static void (*saved_after_char_processing_hook
) (void);
764 /* The number of nested readline secondary prompts that are currently
767 static int gdb_secondary_prompt_depth
= 0;
772 gdb_in_secondary_prompt_p (void)
774 return gdb_secondary_prompt_depth
> 0;
778 /* This function is called when readline has seen a complete line of
782 gdb_readline_wrapper_line (char *line
)
784 gdb_assert (!gdb_readline_wrapper_done
);
785 gdb_readline_wrapper_result
= line
;
786 gdb_readline_wrapper_done
= 1;
788 /* Prevent operate-and-get-next from acting too early. */
789 saved_after_char_processing_hook
= after_char_processing_hook
;
790 after_char_processing_hook
= NULL
;
792 /* Prevent parts of the prompt from being redisplayed if annotations
793 are enabled, and readline's state getting out of sync. We'll
794 reinstall the callback handler, which puts the terminal in raw
795 mode (or in readline lingo, in prepped state), when we're next
796 ready to process user input, either in display_gdb_prompt, or if
797 we're handling an asynchronous target event and running in the
798 background, just before returning to the event loop to process
799 further input (or more target events). */
800 if (async_command_editing_p
)
801 gdb_rl_callback_handler_remove ();
804 struct gdb_readline_wrapper_cleanup
806 void (*handler_orig
) (char *);
807 int already_prompted_orig
;
809 /* Whether the target was async. */
810 int target_is_async_orig
;
814 gdb_readline_wrapper_cleanup (void *arg
)
816 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
818 rl_already_prompted
= cleanup
->already_prompted_orig
;
820 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
821 input_handler
= cleanup
->handler_orig
;
823 /* Don't restore our input handler in readline yet. That would make
824 readline prep the terminal (putting it in raw mode), while the
825 line we just read may trigger execution of a command that expects
826 the terminal in the default cooked/canonical mode, such as e.g.,
827 running Python's interactive online help utility. See
828 gdb_readline_wrapper_line for when we'll reinstall it. */
830 gdb_readline_wrapper_result
= NULL
;
831 gdb_readline_wrapper_done
= 0;
832 gdb_secondary_prompt_depth
--;
833 gdb_assert (gdb_secondary_prompt_depth
>= 0);
835 after_char_processing_hook
= saved_after_char_processing_hook
;
836 saved_after_char_processing_hook
= NULL
;
838 if (cleanup
->target_is_async_orig
)
845 gdb_readline_wrapper (const char *prompt
)
847 struct cleanup
*back_to
;
848 struct gdb_readline_wrapper_cleanup
*cleanup
;
851 cleanup
= XNEW (struct gdb_readline_wrapper_cleanup
);
852 cleanup
->handler_orig
= input_handler
;
853 input_handler
= gdb_readline_wrapper_line
;
855 cleanup
->already_prompted_orig
= rl_already_prompted
;
857 cleanup
->target_is_async_orig
= target_is_async_p ();
859 gdb_secondary_prompt_depth
++;
860 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
862 if (cleanup
->target_is_async_orig
)
865 /* Display our prompt and prevent double prompt display. */
866 display_gdb_prompt (prompt
);
867 rl_already_prompted
= 1;
869 if (after_char_processing_hook
)
870 (*after_char_processing_hook
) ();
871 gdb_assert (after_char_processing_hook
== NULL
);
873 while (gdb_do_one_event () >= 0)
874 if (gdb_readline_wrapper_done
)
877 retval
= gdb_readline_wrapper_result
;
878 do_cleanups (back_to
);
883 /* The current saved history number from operate-and-get-next.
884 This is -1 if not valid. */
885 static int operate_saved_history
= -1;
887 /* This is put on the appropriate hook and helps operate-and-get-next
890 gdb_rl_operate_and_get_next_completion (void)
892 int delta
= where_history () - operate_saved_history
;
894 /* The `key' argument to rl_get_previous_history is ignored. */
895 rl_get_previous_history (delta
, 0);
896 operate_saved_history
= -1;
898 /* readline doesn't automatically update the display for us. */
901 after_char_processing_hook
= NULL
;
902 rl_pre_input_hook
= NULL
;
905 /* This is a gdb-local readline command handler. It accepts the
906 current command line (like RET does) and, if this command was taken
907 from the history, arranges for the next command in the history to
908 appear on the command line when the prompt returns.
909 We ignore the arguments. */
911 gdb_rl_operate_and_get_next (int count
, int key
)
915 /* Use the async hook. */
916 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
918 /* Find the current line, and find the next line to use. */
919 where
= where_history();
921 if ((history_is_stifled () && (history_length
>= history_max_entries
))
922 || (where
>= history_length
- 1))
923 operate_saved_history
= where
;
925 operate_saved_history
= where
+ 1;
927 return rl_newline (1, key
);
930 /* Number of user commands executed during this session. */
932 static int command_count
= 0;
934 /* Add the user command COMMAND to the input history list. */
937 gdb_add_history (const char *command
)
941 if (history_remove_duplicates
!= 0)
944 int lookbehind_threshold
;
946 /* The lookbehind threshold for finding a duplicate history entry is
947 bounded by command_count because we can't meaningfully delete
948 history entries that are already stored in the history file since
949 the history file is appended to. */
950 if (history_remove_duplicates
== -1
951 || history_remove_duplicates
> command_count
)
952 lookbehind_threshold
= command_count
;
954 lookbehind_threshold
= history_remove_duplicates
;
957 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
959 HIST_ENTRY
*temp
= previous_history ();
964 if (strcmp (temp
->line
, command
) == 0)
966 HIST_ENTRY
*prev
= remove_history (where_history ());
968 free_history_entry (prev
);
975 add_history (command
);
978 /* Safely append new history entries to the history file in a corruption-free
979 way using an intermediate local history file. */
982 gdb_safe_append_history (void)
984 int ret
, saved_errno
;
985 char *local_history_filename
;
986 struct cleanup
*old_chain
;
988 local_history_filename
989 = xstrprintf ("%s-gdb%d~", history_filename
, getpid ());
990 old_chain
= make_cleanup (xfree
, local_history_filename
);
992 ret
= rename (history_filename
, local_history_filename
);
994 if (ret
< 0 && saved_errno
!= ENOENT
)
996 warning (_("Could not rename %s to %s: %s"),
997 history_filename
, local_history_filename
,
998 safe_strerror (saved_errno
));
1004 /* If the rename failed with ENOENT then either the global history
1005 file never existed in the first place or another GDB process is
1006 currently appending to it (and has thus temporarily renamed it).
1007 Since we can't distinguish between these two cases, we have to
1008 conservatively assume the first case and therefore must write out
1009 (not append) our known history to our local history file and try
1010 to move it back anyway. Otherwise a global history file would
1011 never get created! */
1012 gdb_assert (saved_errno
== ENOENT
);
1013 write_history (local_history_filename
);
1017 append_history (command_count
, local_history_filename
);
1018 if (history_is_stifled ())
1019 history_truncate_file (local_history_filename
, history_max_entries
);
1022 ret
= rename (local_history_filename
, history_filename
);
1023 saved_errno
= errno
;
1024 if (ret
< 0 && saved_errno
!= EEXIST
)
1025 warning (_("Could not rename %s to %s: %s"),
1026 local_history_filename
, history_filename
,
1027 safe_strerror (saved_errno
));
1030 do_cleanups (old_chain
);
1033 /* Read one line from the command input stream `instream'
1034 into the local static buffer `linebuffer' (whose current length
1036 The buffer is made bigger as necessary.
1037 Returns the address of the start of the line.
1039 NULL is returned for end of file.
1041 *If* the instream == stdin & stdin is a terminal, the line read
1042 is copied into the file line saver (global var char *line,
1043 length linesize) so that it can be duplicated.
1045 This routine either uses fancy command line editing or
1046 simple input as the user has requested. */
1049 command_line_input (const char *prompt_arg
, int repeat
, char *annotation_suffix
)
1051 static char *linebuffer
= 0;
1052 static unsigned linelength
= 0;
1053 const char *prompt
= prompt_arg
;
1060 /* The annotation suffix must be non-NULL. */
1061 if (annotation_suffix
== NULL
)
1062 annotation_suffix
= "";
1064 if (annotation_level
> 1 && instream
== stdin
)
1068 local_prompt
= alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1069 + strlen (annotation_suffix
) + 40);
1071 local_prompt
[0] = '\0';
1073 strcpy (local_prompt
, prompt
);
1074 strcat (local_prompt
, "\n\032\032");
1075 strcat (local_prompt
, annotation_suffix
);
1076 strcat (local_prompt
, "\n");
1078 prompt
= local_prompt
;
1081 if (linebuffer
== 0)
1084 linebuffer
= (char *) xmalloc (linelength
);
1089 /* Control-C quits instantly if typed while in this loop
1090 since it should not wait until the user types a newline. */
1095 signal (STOP_SIGNAL
, handle_stop_sig
);
1100 /* Make sure that all output has been output. Some machines may
1101 let you get away with leaving out some of the gdb_flush, but
1104 gdb_flush (gdb_stdout
);
1105 gdb_flush (gdb_stderr
);
1107 if (source_file_name
!= NULL
)
1108 ++source_line_number
;
1110 if (annotation_level
> 1 && instream
== stdin
)
1112 puts_unfiltered ("\n\032\032pre-");
1113 puts_unfiltered (annotation_suffix
);
1114 puts_unfiltered ("\n");
1117 /* Don't use fancy stuff if not talking to stdin. */
1118 if (deprecated_readline_hook
&& input_from_terminal_p ())
1120 rl
= (*deprecated_readline_hook
) (prompt
);
1122 else if (command_editing_p
&& input_from_terminal_p ())
1124 rl
= gdb_readline_wrapper (prompt
);
1128 rl
= gdb_readline (prompt
);
1131 if (annotation_level
> 1 && instream
== stdin
)
1133 puts_unfiltered ("\n\032\032post-");
1134 puts_unfiltered (annotation_suffix
);
1135 puts_unfiltered ("\n");
1138 if (!rl
|| rl
== (char *) EOF
)
1143 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
1145 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
1146 nline
= (char *) xrealloc (linebuffer
, linelength
);
1147 p
+= nline
- linebuffer
;
1151 /* Copy line. Don't copy null at end. (Leaves line alone
1152 if this was just a newline). */
1156 xfree (rl
); /* Allocated in readline. */
1158 if (p
== linebuffer
|| *(p
- 1) != '\\')
1161 p
--; /* Put on top of '\'. */
1167 signal (STOP_SIGNAL
, SIG_DFL
);
1174 #define SERVER_COMMAND_LENGTH 7
1176 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1177 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1180 /* Note that we don't set `line'. Between this and the check in
1181 dont_repeat, this insures that repeating will still do the
1184 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1187 /* Do history expansion if that is wished. */
1188 if (history_expansion_p
&& instream
== stdin
1189 && ISATTY (instream
))
1191 char *history_value
;
1194 *p
= '\0'; /* Insert null now. */
1195 expanded
= history_expand (linebuffer
, &history_value
);
1198 /* Print the changes. */
1199 printf_unfiltered ("%s\n", history_value
);
1201 /* If there was an error, call this function again. */
1204 xfree (history_value
);
1205 return command_line_input (prompt
, repeat
,
1208 if (strlen (history_value
) > linelength
)
1210 linelength
= strlen (history_value
) + 1;
1211 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1213 strcpy (linebuffer
, history_value
);
1214 p
= linebuffer
+ strlen (linebuffer
);
1216 xfree (history_value
);
1219 /* If we just got an empty line, and that is supposed to repeat the
1220 previous command, return the value in the global buffer. */
1221 if (repeat
&& p
== linebuffer
)
1222 return saved_command_line
;
1223 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1225 return saved_command_line
;
1229 /* Add line to history if appropriate. */
1230 if (*linebuffer
&& input_from_terminal_p ())
1231 gdb_add_history (linebuffer
);
1233 /* Save into global buffer if appropriate. */
1236 if (linelength
> saved_command_line_size
)
1238 saved_command_line
= xrealloc (saved_command_line
, linelength
);
1239 saved_command_line_size
= linelength
;
1241 strcpy (saved_command_line
, linebuffer
);
1242 return saved_command_line
;
1248 /* Print the GDB banner. */
1250 print_gdb_version (struct ui_file
*stream
)
1252 /* From GNU coding standards, first line is meant to be easy for a
1253 program to parse, and is just canonical program name and version
1254 number, which starts after last space. */
1256 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1258 /* Second line is a copyright notice. */
1260 fprintf_filtered (stream
,
1261 "Copyright (C) 2015 Free Software Foundation, Inc.\n");
1263 /* Following the copyright is a brief statement that the program is
1264 free software, that users are free to copy and change it on
1265 certain conditions, that it is covered by the GNU GPL, and that
1266 there is no warranty. */
1268 fprintf_filtered (stream
, "\
1269 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1270 \nThis is free software: you are free to change and redistribute it.\n\
1271 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1272 and \"show warranty\" for details.\n");
1274 /* After the required info we print the configuration information. */
1276 fprintf_filtered (stream
, "This GDB was configured as \"");
1277 if (strcmp (host_name
, target_name
) != 0)
1279 fprintf_filtered (stream
, "--host=%s --target=%s",
1280 host_name
, target_name
);
1284 fprintf_filtered (stream
, "%s", host_name
);
1286 fprintf_filtered (stream
, "\".\n\
1287 Type \"show configuration\" for configuration details.");
1289 if (REPORT_BUGS_TO
[0])
1291 fprintf_filtered (stream
,
1292 _("\nFor bug reporting instructions, please see:\n"));
1293 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1295 fprintf_filtered (stream
,
1296 _("Find the GDB manual and other documentation \
1297 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1298 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1299 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1300 commands related to \"word\"."));
1303 /* Print the details of GDB build-time configuration. */
1305 print_gdb_configuration (struct ui_file
*stream
)
1307 fprintf_filtered (stream
, _("\
1308 This GDB was configured as follows:\n\
1309 configure --host=%s --target=%s\n\
1310 "), host_name
, target_name
);
1311 fprintf_filtered (stream
, _("\
1312 --with-auto-load-dir=%s\n\
1313 --with-auto-load-safe-path=%s\n\
1314 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1316 fprintf_filtered (stream
, _("\
1320 fprintf_filtered (stream
, _("\
1325 fprintf_filtered (stream
, _("\
1326 --with-gdb-datadir=%s%s\n\
1327 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1329 fprintf_filtered (stream
, _("\
1330 --with-iconv-bin=%s%s\n\
1331 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1333 if (JIT_READER_DIR
[0])
1334 fprintf_filtered (stream
, _("\
1335 --with-jit-reader-dir=%s%s\n\
1336 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1337 #if HAVE_LIBUNWIND_IA64_H
1338 fprintf_filtered (stream
, _("\
1339 --with-libunwind-ia64\n\
1342 fprintf_filtered (stream
, _("\
1343 --without-libunwind-ia64\n\
1347 fprintf_filtered (stream
, _("\
1351 fprintf_filtered (stream
, _("\
1355 #ifdef WITH_PYTHON_PATH
1356 fprintf_filtered (stream
, _("\
1357 --with-python=%s%s\n\
1358 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1361 fprintf_filtered (stream
, _("\
1365 fprintf_filtered (stream
, _("\
1370 fprintf_filtered (stream
, _("\
1371 --with-relocated-sources=%s\n\
1375 fprintf_filtered (stream
, _("\
1376 --with-separate-debug-dir=%s%s\n\
1377 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1378 if (TARGET_SYSTEM_ROOT
[0])
1379 fprintf_filtered (stream
, _("\
1380 --with-sysroot=%s%s\n\
1381 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1382 if (SYSTEM_GDBINIT
[0])
1383 fprintf_filtered (stream
, _("\
1384 --with-system-gdbinit=%s%s\n\
1385 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1386 #if HAVE_LIBBABELTRACE
1387 fprintf_filtered (stream
, _("\
1388 --with-babeltrace\n\
1391 fprintf_filtered (stream
, _("\
1392 --without-babeltrace\n\
1395 /* We assume "relocatable" will be printed at least once, thus we always
1396 print this text. It's a reasonably safe assumption for now. */
1397 fprintf_filtered (stream
, _("\n\
1398 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1399 tree, and GDB will still find it.)\n\
1404 /* The current top level prompt, settable with "set prompt", and/or
1405 with the python `gdb.prompt_hook' hook. */
1406 static char *top_prompt
;
1408 /* Access method for the GDB prompt string. */
1416 /* Set method for the GDB prompt string. */
1419 set_prompt (const char *s
)
1421 char *p
= xstrdup (s
);
1434 /* Callback for iterate_over_inferiors. Kills or detaches the given
1435 inferior, depending on how we originally gained control of it. */
1438 kill_or_detach (struct inferior
*inf
, void *args
)
1440 struct qt_args
*qt
= args
;
1441 struct thread_info
*thread
;
1446 thread
= any_thread_of_process (inf
->pid
);
1449 switch_to_thread (thread
->ptid
);
1451 /* Leave core files alone. */
1452 if (target_has_execution
)
1454 if (inf
->attach_flag
)
1455 target_detach (qt
->args
, qt
->from_tty
);
1464 /* Callback for iterate_over_inferiors. Prints info about what GDB
1465 will do to each inferior on a "quit". ARG points to a struct
1466 ui_out where output is to be collected. */
1469 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1471 struct ui_file
*stb
= arg
;
1476 if (inf
->attach_flag
)
1477 fprintf_filtered (stb
,
1478 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1479 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1481 fprintf_filtered (stb
,
1482 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1483 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1488 /* If necessary, make the user confirm that we should quit. Return
1489 non-zero if we should quit, zero if we shouldn't. */
1494 struct ui_file
*stb
;
1495 struct cleanup
*old_chain
;
1499 /* Don't even ask if we're only debugging a core file inferior. */
1500 if (!have_live_inferiors ())
1503 /* Build the query string as a single string. */
1504 stb
= mem_fileopen ();
1505 old_chain
= make_cleanup_ui_file_delete (stb
);
1507 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1508 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1509 fprintf_filtered (stb
, _("\nQuit anyway? "));
1511 str
= ui_file_xstrdup (stb
, NULL
);
1512 make_cleanup (xfree
, str
);
1514 qr
= query ("%s", str
);
1515 do_cleanups (old_chain
);
1519 /* Prepare to exit GDB cleanly by undoing any changes made to the
1520 terminal so that we leave the terminal in the state we acquired it. */
1523 undo_terminal_modifications_before_exit (void)
1525 target_terminal_ours ();
1529 if (async_command_editing_p
)
1530 gdb_disable_readline ();
1534 /* Quit without asking for confirmation. */
1537 quit_force (char *args
, int from_tty
)
1542 undo_terminal_modifications_before_exit ();
1544 /* An optional expression may be used to cause gdb to terminate with the
1545 value of that expression. */
1548 struct value
*val
= parse_and_eval (args
);
1550 exit_code
= (int) value_as_long (val
);
1552 else if (return_child_result
)
1553 exit_code
= return_child_result_value
;
1556 qt
.from_tty
= from_tty
;
1558 /* We want to handle any quit errors and exit regardless. */
1560 /* Get out of tfind mode, and kill or detach all inferiors. */
1563 disconnect_tracing ();
1564 iterate_over_inferiors (kill_or_detach
, &qt
);
1566 CATCH (ex
, RETURN_MASK_ALL
)
1568 exception_print (gdb_stderr
, ex
);
1572 /* Give all pushed targets a chance to do minimal cleanup, and pop
1578 CATCH (ex
, RETURN_MASK_ALL
)
1580 exception_print (gdb_stderr
, ex
);
1584 /* Save the history information if it is appropriate to do so. */
1587 if (write_history_p
&& history_filename
1588 && input_from_terminal_p ())
1589 gdb_safe_append_history ();
1591 CATCH (ex
, RETURN_MASK_ALL
)
1593 exception_print (gdb_stderr
, ex
);
1597 /* Do any final cleanups before exiting. */
1600 do_final_cleanups (all_cleanups ());
1602 CATCH (ex
, RETURN_MASK_ALL
)
1604 exception_print (gdb_stderr
, ex
);
1611 /* Returns whether GDB is running on a terminal and input is
1612 currently coming from that terminal. */
1615 input_from_terminal_p (void)
1620 if (gdb_has_a_terminal () && instream
== stdin
)
1623 /* If INSTREAM is unset, and we are not in a user command, we
1624 must be in Insight. That's like having a terminal, for our
1626 if (instream
== NULL
&& !in_user_command
)
1633 dont_repeat_command (char *ignored
, int from_tty
)
1635 /* Can't call dont_repeat here because we're not necessarily reading
1637 *saved_command_line
= 0;
1640 /* Functions to manipulate command line editing control variables. */
1642 /* Number of commands to print in each call to show_commands. */
1643 #define Hist_print 10
1645 show_commands (char *args
, int from_tty
)
1647 /* Index for history commands. Relative to history_base. */
1650 /* Number of the history entry which we are planning to display next.
1651 Relative to history_base. */
1654 /* Print out some of the commands from the command history. */
1658 if (args
[0] == '+' && args
[1] == '\0')
1659 /* "info editing +" should print from the stored position. */
1662 /* "info editing <exp>" should print around command number <exp>. */
1663 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1665 /* "show commands" means print the last Hist_print commands. */
1668 num
= history_length
- Hist_print
;
1674 /* If there are at least Hist_print commands, we want to display the last
1675 Hist_print rather than, say, the last 6. */
1676 if (history_length
- num
< Hist_print
)
1678 num
= history_length
- Hist_print
;
1684 offset
< num
+ Hist_print
&& offset
< history_length
;
1687 printf_filtered ("%5d %s\n", history_base
+ offset
,
1688 (history_get (history_base
+ offset
))->line
);
1691 /* The next command we want to display is the next one that we haven't
1695 /* If the user repeats this command with return, it should do what
1696 "show commands +" does. This is unnecessary if arg is null,
1697 because "show commands +" is not useful after "show commands". */
1698 if (from_tty
&& args
)
1705 /* Update the size of our command history file to HISTORY_SIZE.
1707 A HISTORY_SIZE of -1 stands for unlimited. */
1710 set_readline_history_size (int history_size
)
1712 gdb_assert (history_size
>= -1);
1714 if (history_size
== -1)
1715 unstifle_history ();
1717 stifle_history (history_size
);
1720 /* Called by do_setshow_command. */
1722 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1724 set_readline_history_size (history_size_setshow_var
);
1728 set_history (char *args
, int from_tty
)
1730 printf_unfiltered (_("\"set history\" must be followed "
1731 "by the name of a history subcommand.\n"));
1732 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1736 show_history (char *args
, int from_tty
)
1738 cmd_show_list (showhistlist
, from_tty
, "");
1741 int info_verbose
= 0; /* Default verbose msgs off. */
1743 /* Called by do_setshow_command. An elaborate joke. */
1745 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1747 const char *cmdname
= "verbose";
1748 struct cmd_list_element
*showcmd
;
1750 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1751 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1755 c
->doc
= "Set verbose printing of informational messages.";
1756 showcmd
->doc
= "Show verbose printing of informational messages.";
1760 c
->doc
= "Set verbosity.";
1761 showcmd
->doc
= "Show verbosity.";
1765 /* Init the history buffer. Note that we are called after the init file(s)
1766 have been read so that the user can change the history file via his
1767 .gdbinit file (for instance). The GDBHISTFILE environment variable
1768 overrides all of this. */
1775 tmpenv
= getenv ("GDBHISTSIZE");
1782 tmpenv
= skip_spaces (tmpenv
);
1784 var
= strtol (tmpenv
, &endptr
, 10);
1785 saved_errno
= errno
;
1786 endptr
= skip_spaces (endptr
);
1788 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1789 empty string, a negative number or a huge positive number (larger than
1790 INT_MAX) then set the history size to unlimited. Otherwise set our
1791 history size to the number we have read. This behavior is consistent
1792 with how bash handles HISTSIZE. */
1793 if (*endptr
!= '\0')
1795 else if (*tmpenv
== '\0'
1798 /* On targets where INT_MAX == LONG_MAX, we have to look at
1799 errno after calling strtol to distinguish between a value that
1800 is exactly INT_MAX and an overflowing value that was clamped
1802 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1803 history_size_setshow_var
= -1;
1805 history_size_setshow_var
= var
;
1808 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1810 if (history_size_setshow_var
== -2)
1811 history_size_setshow_var
= 256;
1813 set_readline_history_size (history_size_setshow_var
);
1815 tmpenv
= getenv ("GDBHISTFILE");
1817 history_filename
= xstrdup (tmpenv
);
1818 else if (!history_filename
)
1820 /* We include the current directory so that if the user changes
1821 directories the file written will be the same as the one
1824 /* No leading dots in file names are allowed on MSDOS. */
1825 history_filename
= concat (current_directory
, "/_gdb_history",
1828 history_filename
= concat (current_directory
, "/.gdb_history",
1832 read_history (history_filename
);
1836 show_prompt (struct ui_file
*file
, int from_tty
,
1837 struct cmd_list_element
*c
, const char *value
)
1839 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1843 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1844 struct cmd_list_element
*c
, const char *value
)
1846 fprintf_filtered (file
, _("Editing of command lines as "
1847 "they are typed is %s.\n"),
1852 show_annotation_level (struct ui_file
*file
, int from_tty
,
1853 struct cmd_list_element
*c
, const char *value
)
1855 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1859 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1860 struct cmd_list_element
*c
, const char *value
)
1862 fprintf_filtered (file
, _("Notification of completion for "
1863 "asynchronous execution commands is %s.\n"),
1867 /* New values of the "data-directory" parameter are staged here. */
1868 static char *staged_gdb_datadir
;
1870 /* "set" command for the gdb_datadir configuration variable. */
1873 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1875 set_gdb_data_directory (staged_gdb_datadir
);
1876 observer_notify_gdb_datadir_changed ();
1879 /* "show" command for the gdb_datadir configuration variable. */
1882 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
1883 struct cmd_list_element
*c
, const char *value
)
1885 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
1890 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
1892 /* We include the current directory so that if the user changes
1893 directories the file written will be the same as the one
1895 if (!IS_ABSOLUTE_PATH (history_filename
))
1896 history_filename
= reconcat (history_filename
, current_directory
, "/",
1897 history_filename
, (char *) NULL
);
1903 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1904 the DEFAULT_PROMPT is. */
1905 set_prompt (DEFAULT_PROMPT
);
1907 /* Set things up for annotation_level > 1, if the user ever decides
1909 async_annotation_suffix
= "prompt";
1911 /* Set the important stuff up for command editing. */
1912 command_editing_p
= 1;
1913 history_expansion_p
= 0;
1914 write_history_p
= 0;
1916 /* Setup important stuff for command line editing. */
1917 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1918 rl_completion_entry_function
= readline_line_completion_function
;
1919 rl_completer_word_break_characters
= default_word_break_characters ();
1920 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1921 rl_completion_display_matches_hook
= cli_display_match_list
;
1922 rl_readline_name
= "gdb";
1923 rl_terminal_name
= getenv ("TERM");
1925 /* The name for this defun comes from Bash, where it originated.
1926 15 is Control-o, the same binding this function has in Bash. */
1927 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1929 add_setshow_string_cmd ("prompt", class_support
,
1931 _("Set gdb's prompt"),
1932 _("Show gdb's prompt"),
1935 &setlist
, &showlist
);
1937 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1938 Don't repeat this command.\nPrimarily \
1939 used inside of user-defined commands that should not be repeated when\n\
1942 add_setshow_boolean_cmd ("editing", class_support
,
1943 &async_command_editing_p
, _("\
1944 Set editing of command lines as they are typed."), _("\
1945 Show editing of command lines as they are typed."), _("\
1946 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1947 Without an argument, command line editing is enabled. To edit, use\n\
1948 EMACS-like or VI-like commands like control-P or ESC."),
1949 set_async_editing_command
,
1950 show_async_command_editing_p
,
1951 &setlist
, &showlist
);
1953 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1954 Set saving of the history record on exit."), _("\
1955 Show saving of the history record on exit."), _("\
1956 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1957 Without an argument, saving is enabled."),
1959 show_write_history_p
,
1960 &sethistlist
, &showhistlist
);
1962 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
1963 &history_size_setshow_var
, _("\
1964 Set the size of the command history,"), _("\
1965 Show the size of the command history,"), _("\
1966 ie. the number of previous commands to keep a record of.\n\
1967 If set to \"unlimited\", the number of commands kept in the history\n\
1968 list is unlimited. This defaults to the value of the environment\n\
1969 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1970 set_history_size_command
,
1972 &sethistlist
, &showhistlist
);
1974 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
1975 &history_remove_duplicates
, _("\
1976 Set how far back in history to look for and remove duplicate entries."), _("\
1977 Show how far back in history to look for and remove duplicate entries."), _("\
1978 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1979 and remove the first history entry that is a duplicate of the most recent\n\
1980 entry, each time a new history entry is added.\n\
1981 If set to \"unlimited\", this lookbehind is unbounded.\n\
1982 Only history entries added during this session are considered for removal.\n\
1983 If set to 0, removal of duplicate history entries is disabled.\n\
1984 By default this option is set to 0."),
1986 show_history_remove_duplicates
,
1987 &sethistlist
, &showhistlist
);
1989 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1990 Set the filename in which to record the command history"), _("\
1991 Show the filename in which to record the command history"), _("\
1992 (the list of previous commands of which a record is kept)."),
1993 set_history_filename
,
1994 show_history_filename
,
1995 &sethistlist
, &showhistlist
);
1997 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
1998 Set whether to confirm potentially dangerous operations."), _("\
1999 Show whether to confirm potentially dangerous operations."), NULL
,
2002 &setlist
, &showlist
);
2004 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
2005 Set annotation_level."), _("\
2006 Show annotation_level."), _("\
2007 0 == normal; 1 == fullname (for use when running under emacs)\n\
2008 2 == output annotated suitably for use by programs that control GDB."),
2010 show_annotation_level
,
2011 &setlist
, &showlist
);
2013 add_setshow_boolean_cmd ("exec-done-display", class_support
,
2014 &exec_done_display_p
, _("\
2015 Set notification of completion for asynchronous execution commands."), _("\
2016 Show notification of completion for asynchronous execution commands."), _("\
2017 Use \"on\" to enable the notification, and \"off\" to disable it."),
2019 show_exec_done_display_p
,
2020 &setlist
, &showlist
);
2022 add_setshow_filename_cmd ("data-directory", class_maintenance
,
2023 &staged_gdb_datadir
, _("Set GDB's data directory."),
2024 _("Show GDB's data directory."),
2026 When set, GDB uses the specified path to search for data files."),
2027 set_gdb_datadir
, show_gdb_datadir
,
2033 gdb_init (char *argv0
)
2035 if (pre_init_ui_hook
)
2036 pre_init_ui_hook ();
2038 /* Run the init function of each source file. */
2041 /* Make sure we return to the original directory upon exit, come
2042 what may, since the OS doesn't do that for us. */
2043 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
2046 init_cmd_lists (); /* This needs to be done first. */
2047 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2048 initialize_utils (); /* Make errors and warnings possible. */
2052 /* Here is where we call all the _initialize_foo routines. */
2053 initialize_all_files ();
2055 /* This creates the current_program_space. Do this after all the
2056 _initialize_foo routines have had a chance to install their
2057 per-sspace data keys. Also do this before
2058 initialize_current_architecture is called, because it accesses
2059 exec_bfd of the current program space. */
2060 initialize_progspace ();
2061 initialize_inferiors ();
2062 initialize_current_architecture ();
2064 init_main (); /* But that omits this file! Do it now. */
2066 initialize_stdin_serial ();
2068 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2070 set_initial_gdb_ttystate ();
2072 async_init_signals ();
2074 /* We need a default language for parsing expressions, so simple
2075 things like "set width 0" won't fail if no language is explicitly
2076 set in a config file or implicitly set by reading an executable
2078 set_language (language_c
);
2079 expected_language
= current_language
; /* Don't warn about the change. */
2081 /* Python initialization, for example, can require various commands to be
2082 installed. For example "info pretty-printer" needs the "info"
2083 prefix to be installed. Keep things simple and just do final
2084 script initialization here. */
2085 finish_ext_lang_initialization ();