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"
53 /* readline include files. */
54 #include "readline/readline.h"
55 #include "readline/history.h"
57 /* readline defines this. */
60 #include <sys/types.h>
62 #include "event-top.h"
67 #include "tracepoint.h"
74 extern void initialize_all_files (void);
76 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
77 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
78 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
80 /* Default command line prompt. This is overriden in some configs. */
82 #ifndef DEFAULT_PROMPT
83 #define DEFAULT_PROMPT "(gdb) "
86 /* Initialization file name for gdb. This is host-dependent. */
88 const char gdbinit
[] = GDBINIT
;
90 int inhibit_gdbinit
= 0;
92 extern char lang_frame_mismatch_warn
[]; /* language.c */
94 /* Flag for whether we want to confirm potentially dangerous
95 operations. Default is yes. */
100 show_confirm (struct ui_file
*file
, int from_tty
,
101 struct cmd_list_element
*c
, const char *value
)
103 fprintf_filtered (file
, _("Whether to confirm potentially "
104 "dangerous operations is %s.\n"),
108 /* stdio stream that command input is being read from. Set to stdin
109 normally. Set by source_command to the file we are sourcing. Set
110 to NULL if we are executing a user-defined command or interacting
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 *);
132 /* Buffer used for reading command lines, and the size
133 allocated for it so far. */
135 char *saved_command_line
;
136 int saved_command_line_size
= 100;
138 /* Nonzero if the current command is modified by "server ". This
139 affects things like recording into the command history, commands
140 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
141 whatever) can issue its own commands and also send along commands
142 from the user, and have the user not notice that the user interface
143 is issuing commands too. */
146 /* Timeout limit for response from target. */
148 /* The default value has been changed many times over the years. It
149 was originally 5 seconds. But that was thought to be a long time
150 to sit and wait, so it was changed to 2 seconds. That was thought
151 to be plenty unless the connection was going through some terminal
152 server or multiplexer or other form of hairy serial connection.
154 In mid-1996, remote_timeout was moved from remote.c to top.c and
155 it began being used in other remote-* targets. It appears that the
156 default was changed to 20 seconds at that time, perhaps because the
157 Renesas E7000 ICE didn't always respond in a timely manner.
159 But if 5 seconds is a long time to sit and wait for retransmissions,
160 20 seconds is far worse. This demonstrates the difficulty of using
161 a single variable for all protocol timeouts.
163 As remote.c is used much more than remote-e7000.c, it was changed
164 back to 2 seconds in 1999. */
166 int remote_timeout
= 2;
168 /* Non-zero tells remote* modules to output debugging info. */
170 int remote_debug
= 0;
172 /* Sbrk location on entry to main. Used for statistics only. */
177 /* Hooks for alternate command interfaces. */
179 /* This hook is called from within gdb's many mini-event loops which
180 could steal control from a real user interface's event loop. It
181 returns non-zero if the user is requesting a detach, zero
184 int (*deprecated_ui_loop_hook
) (int);
187 /* Called from print_frame_info to list the line we stopped in. */
189 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
,
193 /* Replaces most of query. */
195 int (*deprecated_query_hook
) (const char *, va_list);
197 /* Replaces most of warning. */
199 void (*deprecated_warning_hook
) (const char *, va_list);
201 /* These three functions support getting lines of text from the user.
202 They are used in sequence. First deprecated_readline_begin_hook is
203 called with a text string that might be (for example) a message for
204 the user to type in a sequence of commands to be executed at a
205 breakpoint. If this function calls back to a GUI, it might take
206 this opportunity to pop up a text interaction window with this
207 message. Next, deprecated_readline_hook is called with a prompt
208 that is emitted prior to collecting the user input. It can be
209 called multiple times. Finally, deprecated_readline_end_hook is
210 called to notify the GUI that we are done with the interaction
211 window and it can close it. */
213 void (*deprecated_readline_begin_hook
) (char *, ...);
214 char *(*deprecated_readline_hook
) (const char *);
215 void (*deprecated_readline_end_hook
) (void);
217 /* Called as appropriate to notify the interface that we have attached
218 to or detached from an already running process. */
220 void (*deprecated_attach_hook
) (void);
221 void (*deprecated_detach_hook
) (void);
223 /* Called during long calculations to allow GUI to repair window
224 damage, and to check for stop buttons, etc... */
226 void (*deprecated_interactive_hook
) (void);
228 /* Called when going to wait for the target. Usually allows the GUI
229 to run while waiting for target events. */
231 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
232 struct target_waitstatus
*status
,
235 /* Used by UI as a wrapper around command execution. May do various
236 things like enabling/disabling buttons, etc... */
238 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
,
239 char *cmd
, int from_tty
);
241 /* Called when the current thread changes. Argument is thread id. */
243 void (*deprecated_context_hook
) (int id
);
245 /* Handler for SIGHUP. */
248 /* NOTE 1999-04-29: This function will be static again, once we modify
249 gdb to use the event loop as the default command loop and we merge
250 event-top.c into this file, top.c. */
254 /* Stop asking user for confirmation --- we're exiting. This
255 prevents asking the user dumb questions. */
257 quit_command ((char *) 0, 0);
259 #endif /* defined SIGHUP */
261 /* Line number we are currently in, in a file which is being sourced. */
262 /* NOTE 1999-04-29: This variable will be static again, once we modify
263 gdb to use the event loop as the default command loop and we merge
264 event-top.c into this file, top.c. */
265 /* static */ int source_line_number
;
267 /* Name of the file we are sourcing. */
268 /* NOTE 1999-04-29: This variable will be static again, once we modify
269 gdb to use the event loop as the default command loop and we merge
270 event-top.c into this file, top.c. */
271 /* static */ const char *source_file_name
;
273 /* Clean up on error during a "source" command (or execution of a
274 user-defined command). */
277 do_restore_instream_cleanup (void *stream
)
279 /* Restore the previous input stream. */
283 /* Read commands from STREAM. */
285 read_command_file (FILE *stream
)
287 struct cleanup
*cleanups
;
289 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
292 do_cleanups (cleanups
);
295 void (*pre_init_ui_hook
) (void);
299 do_chdir_cleanup (void *old_dir
)
307 prepare_execute_command (void)
310 struct cleanup
*cleanup
;
312 mark
= value_mark ();
313 cleanup
= make_cleanup_value_free_to_mark (mark
);
315 /* With multiple threads running while the one we're examining is
316 stopped, the dcache can get stale without us being able to detect
317 it. For the duration of the command, though, use the dcache to
318 help things like backtrace. */
320 target_dcache_invalidate ();
325 /* Tell the user if the language has changed (except first time) after
326 executing a command. */
329 check_frame_language_change (void)
331 static int warned
= 0;
333 /* First make sure that a new frame has been selected, in case the
334 command or the hooks changed the program state. */
335 deprecated_safe_get_selected_frame ();
336 if (current_language
!= expected_language
)
338 if (language_mode
== language_mode_auto
&& info_verbose
)
340 language_info (1); /* Print what changed. */
345 /* Warn the user if the working language does not match the language
346 of the current frame. Only warn the user if we are actually
347 running the program, i.e. there is a stack. */
348 /* FIXME: This should be cacheing the frame and only running when
349 the frame changes. */
351 if (has_stack_frames ())
355 flang
= get_frame_language ();
357 && flang
!= language_unknown
358 && flang
!= current_language
->la_language
)
360 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
369 maybe_wait_sync_command_done (int was_sync
)
371 /* If the interpreter is in sync mode (we're running a user
372 command's list, running command hooks or similars), and we
373 just ran a synchronous command that started the target, wait
374 for that command to end. */
375 if (!interpreter_async
&& !was_sync
&& sync_execution
)
377 while (gdb_do_one_event () >= 0)
383 /* Execute the line P as a command, in the current user context.
384 Pass FROM_TTY as second argument to the defining function. */
387 execute_command (char *p
, int from_tty
)
389 struct cleanup
*cleanup_if_error
, *cleanup
;
390 struct cmd_list_element
*c
;
393 cleanup_if_error
= make_bpstat_clear_actions_cleanup ();
394 cleanup
= prepare_execute_command ();
396 /* Force cleanup of any alloca areas if using C alloca instead of
400 /* This can happen when command_line_input hits end of file. */
403 do_cleanups (cleanup
);
404 discard_cleanups (cleanup_if_error
);
408 target_log_command (p
);
410 while (*p
== ' ' || *p
== '\t')
416 int was_sync
= sync_execution
;
420 /* If trace-commands is set then this will print this command. */
421 print_command_trace (p
);
423 c
= lookup_cmd (&cmd
, cmdlist
, "", 0, 1);
426 /* Pass null arg rather than an empty one. */
429 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
430 while the is_complete_command(cfunc) test is just plain
431 bogus. They should both be replaced by a test of the form
432 c->strip_trailing_white_space_p. */
433 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
434 can't be replaced with func. This is because it is the
435 cfunc, and not the func, that has the value that the
436 is_complete_command hack is testing for. */
437 /* Clear off trailing whitespace, except for set and complete
440 && c
->type
!= set_cmd
441 && !is_complete_command (c
))
443 p
= arg
+ strlen (arg
) - 1;
444 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
449 /* If this command has been pre-hooked, run the hook first. */
450 execute_cmd_pre_hook (c
);
452 if (c
->deprecated_warn_user
)
453 deprecated_cmd_warning (line
);
455 /* c->user_commands would be NULL in the case of a python command. */
456 if (c
->theclass
== class_user
&& c
->user_commands
)
457 execute_user_command (c
, arg
);
458 else if (c
->type
== set_cmd
)
459 do_set_command (arg
, from_tty
, c
);
460 else if (c
->type
== show_cmd
)
461 do_show_command (arg
, from_tty
, c
);
462 else if (!cmd_func_p (c
))
463 error (_("That is not a command, just a help topic."));
464 else if (deprecated_call_command_hook
)
465 deprecated_call_command_hook (c
, arg
, from_tty
);
467 cmd_func (c
, arg
, from_tty
);
469 maybe_wait_sync_command_done (was_sync
);
471 /* If this command has been post-hooked, run the hook last. */
472 execute_cmd_post_hook (c
);
476 check_frame_language_change ();
478 do_cleanups (cleanup
);
479 discard_cleanups (cleanup_if_error
);
482 /* Run execute_command for P and FROM_TTY. Capture its output into the
483 returned string, do not display it to the screen. BATCH_FLAG will be
484 temporarily set to true. */
487 execute_command_to_string (char *p
, int from_tty
)
489 struct ui_file
*str_file
;
490 struct cleanup
*cleanup
;
493 /* GDB_STDOUT should be better already restored during these
494 restoration callbacks. */
495 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
497 make_cleanup_restore_integer (&interpreter_async
);
498 interpreter_async
= 0;
500 str_file
= mem_fileopen ();
502 make_cleanup_ui_file_delete (str_file
);
503 make_cleanup_restore_ui_file (&gdb_stdout
);
504 make_cleanup_restore_ui_file (&gdb_stderr
);
505 make_cleanup_restore_ui_file (&gdb_stdlog
);
506 make_cleanup_restore_ui_file (&gdb_stdtarg
);
507 make_cleanup_restore_ui_file (&gdb_stdtargerr
);
509 if (ui_out_redirect (current_uiout
, str_file
) < 0)
510 warning (_("Current output protocol does not support redirection"));
512 make_cleanup_ui_out_redirect_pop (current_uiout
);
514 gdb_stdout
= str_file
;
515 gdb_stderr
= str_file
;
516 gdb_stdlog
= str_file
;
517 gdb_stdtarg
= str_file
;
518 gdb_stdtargerr
= str_file
;
520 execute_command (p
, from_tty
);
522 retval
= ui_file_xstrdup (str_file
, NULL
);
524 do_cleanups (cleanup
);
529 /* Read commands from `instream' and execute them
530 until end of file or error reading instream. */
535 struct cleanup
*old_chain
;
537 int stdin_is_tty
= ISATTY (stdin
);
539 while (instream
&& !feof (instream
))
541 if (window_hook
&& instream
== stdin
)
542 (*window_hook
) (instream
, get_prompt ());
545 if (instream
== stdin
&& stdin_is_tty
)
546 reinitialize_more_filter ();
547 old_chain
= make_cleanup (null_cleanup
, 0);
549 /* Get a command-line. This calls the readline package. */
550 command
= command_line_input (instream
== stdin
?
551 get_prompt () : (char *) NULL
,
552 instream
== stdin
, "prompt");
555 do_cleanups (old_chain
);
559 make_command_stats_cleanup (1);
561 /* Do not execute commented lines. */
562 if (command
[0] != '#')
564 execute_command (command
, instream
== stdin
);
566 /* Do any commands attached to breakpoint we are stopped at. */
567 bpstat_do_actions ();
569 do_cleanups (old_chain
);
573 /* When nonzero, cause dont_repeat to do nothing. This should only be
574 set via prevent_dont_repeat. */
576 static int suppress_dont_repeat
= 0;
578 /* Commands call this if they do not want to be repeated by null lines. */
583 if (suppress_dont_repeat
|| server_command
)
586 /* If we aren't reading from standard input, we are saving the last
587 thing read from stdin in line and don't want to delete it. Null
588 lines won't repeat here in any case. */
589 if (instream
== stdin
)
590 *saved_command_line
= 0;
593 /* Prevent dont_repeat from working, and return a cleanup that
594 restores the previous state. */
597 prevent_dont_repeat (void)
599 struct cleanup
*result
= make_cleanup_restore_integer (&suppress_dont_repeat
);
601 suppress_dont_repeat
= 1;
606 /* Read a line from the stream "instream" without command line editing.
608 It prints PROMPT_ARG once at the start.
609 Action is compatible with "readline", e.g. space for the result is
610 malloc'd and should be freed by the caller.
612 A NULL return means end of file. */
614 gdb_readline (const char *prompt_arg
)
619 int result_size
= 80;
623 /* Don't use a _filtered function here. It causes the assumed
624 character position to be off, since the newline we read from
625 the user is not accounted for. */
626 fputs_unfiltered (prompt_arg
, gdb_stdout
);
627 gdb_flush (gdb_stdout
);
630 result
= (char *) xmalloc (result_size
);
634 /* Read from stdin if we are executing a user defined command.
635 This is the right thing for prompt_for_continue, at least. */
636 c
= fgetc (instream
? instream
: stdin
);
641 /* The last line does not end with a newline. Return it, and
642 if we are called again fgetc will still return EOF and
643 we'll return NULL then. */
651 if (input_index
> 0 && result
[input_index
- 1] == '\r')
656 result
[input_index
++] = c
;
657 while (input_index
>= result_size
)
660 result
= (char *) xrealloc (result
, result_size
);
664 result
[input_index
++] = '\0';
668 /* Variables which control command line editing and history
669 substitution. These variables are given default values at the end
671 static int command_editing_p
;
673 /* NOTE 1999-04-29: This variable will be static again, once we modify
674 gdb to use the event loop as the default command loop and we merge
675 event-top.c into this file, top.c. */
677 /* static */ int history_expansion_p
;
679 static int write_history_p
;
681 show_write_history_p (struct ui_file
*file
, int from_tty
,
682 struct cmd_list_element
*c
, const char *value
)
684 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
688 /* The variable associated with the "set/show history size"
689 command. The value -1 means unlimited, and -2 means undefined. */
690 static int history_size_setshow_var
= -2;
693 show_history_size (struct ui_file
*file
, int from_tty
,
694 struct cmd_list_element
*c
, const char *value
)
696 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
700 /* Variable associated with the "history remove-duplicates" option.
701 The value -1 means unlimited. */
702 static int history_remove_duplicates
= 0;
705 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
706 struct cmd_list_element
*c
, const char *value
)
708 fprintf_filtered (file
,
709 _("The number of history entries to look back at for "
710 "duplicates is %s.\n"),
714 static char *history_filename
;
716 show_history_filename (struct ui_file
*file
, int from_tty
,
717 struct cmd_list_element
*c
, const char *value
)
719 fprintf_filtered (file
, _("The filename in which to record "
720 "the command history is \"%s\".\n"),
724 /* This is like readline(), but it has some gdb-specific behavior.
725 gdb may want readline in both the synchronous and async modes during
726 a single gdb invocation. At the ordinary top-level prompt we might
727 be using the async readline. That means we can't use
728 rl_pre_input_hook, since it doesn't work properly in async mode.
729 However, for a secondary prompt (" >", such as occurs during a
730 `define'), gdb wants a synchronous response.
732 We used to call readline() directly, running it in synchronous
733 mode. But mixing modes this way is not supported, and as of
734 readline 5.x it no longer works; the arrow keys come unbound during
735 the synchronous call. So we make a nested call into the event
736 loop. That's what gdb_readline_wrapper is for. */
738 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
739 rely on gdb_readline_wrapper_result, which might still be NULL if
740 the user types Control-D for EOF. */
741 static int gdb_readline_wrapper_done
;
743 /* The result of the current call to gdb_readline_wrapper, once a newline
745 static char *gdb_readline_wrapper_result
;
747 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
748 to be called after the newline is processed (which will redisplay
749 the prompt). But in gdb_readline_wrapper we will not get a new
750 prompt until the next call, or until we return to the event loop.
751 So we disable this hook around the newline and restore it before we
753 static void (*saved_after_char_processing_hook
) (void);
755 /* This function is called when readline has seen a complete line of
759 gdb_readline_wrapper_line (char *line
)
761 gdb_assert (!gdb_readline_wrapper_done
);
762 gdb_readline_wrapper_result
= line
;
763 gdb_readline_wrapper_done
= 1;
765 /* Prevent operate-and-get-next from acting too early. */
766 saved_after_char_processing_hook
= after_char_processing_hook
;
767 after_char_processing_hook
= NULL
;
769 /* Prevent parts of the prompt from being redisplayed if annotations
770 are enabled, and readline's state getting out of sync. We'll
771 reinstall the callback handler, which puts the terminal in raw
772 mode (or in readline lingo, in prepped state), when we're next
773 ready to process user input, either in display_gdb_prompt, or if
774 we're handling an asynchronous target event and running in the
775 background, just before returning to the event loop to process
776 further input (or more target events). */
777 if (async_command_editing_p
)
778 gdb_rl_callback_handler_remove ();
781 struct gdb_readline_wrapper_cleanup
783 void (*handler_orig
) (char *);
784 int already_prompted_orig
;
786 /* Whether the target was async. */
787 int target_is_async_orig
;
791 gdb_readline_wrapper_cleanup (void *arg
)
793 struct gdb_readline_wrapper_cleanup
*cleanup
= arg
;
795 rl_already_prompted
= cleanup
->already_prompted_orig
;
797 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
798 input_handler
= cleanup
->handler_orig
;
800 /* Don't restore our input handler in readline yet. That would make
801 readline prep the terminal (putting it in raw mode), while the
802 line we just read may trigger execution of a command that expects
803 the terminal in the default cooked/canonical mode, such as e.g.,
804 running Python's interactive online help utility. See
805 gdb_readline_wrapper_line for when we'll reinstall it. */
807 gdb_readline_wrapper_result
= NULL
;
808 gdb_readline_wrapper_done
= 0;
810 after_char_processing_hook
= saved_after_char_processing_hook
;
811 saved_after_char_processing_hook
= NULL
;
813 if (cleanup
->target_is_async_orig
)
820 gdb_readline_wrapper (const char *prompt
)
822 struct cleanup
*back_to
;
823 struct gdb_readline_wrapper_cleanup
*cleanup
;
826 cleanup
= xmalloc (sizeof (*cleanup
));
827 cleanup
->handler_orig
= input_handler
;
828 input_handler
= gdb_readline_wrapper_line
;
830 cleanup
->already_prompted_orig
= rl_already_prompted
;
832 cleanup
->target_is_async_orig
= target_is_async_p ();
834 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
836 if (cleanup
->target_is_async_orig
)
839 /* Display our prompt and prevent double prompt display. */
840 display_gdb_prompt (prompt
);
841 rl_already_prompted
= 1;
843 if (after_char_processing_hook
)
844 (*after_char_processing_hook
) ();
845 gdb_assert (after_char_processing_hook
== NULL
);
847 while (gdb_do_one_event () >= 0)
848 if (gdb_readline_wrapper_done
)
851 retval
= gdb_readline_wrapper_result
;
852 do_cleanups (back_to
);
857 /* The current saved history number from operate-and-get-next.
858 This is -1 if not valid. */
859 static int operate_saved_history
= -1;
861 /* This is put on the appropriate hook and helps operate-and-get-next
864 gdb_rl_operate_and_get_next_completion (void)
866 int delta
= where_history () - operate_saved_history
;
868 /* The `key' argument to rl_get_previous_history is ignored. */
869 rl_get_previous_history (delta
, 0);
870 operate_saved_history
= -1;
872 /* readline doesn't automatically update the display for us. */
875 after_char_processing_hook
= NULL
;
876 rl_pre_input_hook
= NULL
;
879 /* This is a gdb-local readline command handler. It accepts the
880 current command line (like RET does) and, if this command was taken
881 from the history, arranges for the next command in the history to
882 appear on the command line when the prompt returns.
883 We ignore the arguments. */
885 gdb_rl_operate_and_get_next (int count
, int key
)
889 /* Use the async hook. */
890 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
892 /* Find the current line, and find the next line to use. */
893 where
= where_history();
895 if ((history_is_stifled () && (history_length
>= history_max_entries
))
896 || (where
>= history_length
- 1))
897 operate_saved_history
= where
;
899 operate_saved_history
= where
+ 1;
901 return rl_newline (1, key
);
904 /* Number of user commands executed during this session. */
906 static int command_count
= 0;
908 /* Add the user command COMMAND to the input history list. */
911 gdb_add_history (const char *command
)
915 if (history_remove_duplicates
!= 0)
918 int lookbehind_threshold
;
920 /* The lookbehind threshold for finding a duplicate history entry is
921 bounded by command_count because we can't meaningfully delete
922 history entries that are already stored in the history file since
923 the history file is appended to. */
924 if (history_remove_duplicates
== -1
925 || history_remove_duplicates
> command_count
)
926 lookbehind_threshold
= command_count
;
928 lookbehind_threshold
= history_remove_duplicates
;
931 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
933 HIST_ENTRY
*temp
= previous_history ();
938 if (strcmp (temp
->line
, command
) == 0)
940 HIST_ENTRY
*prev
= remove_history (where_history ());
942 free_history_entry (prev
);
949 add_history (command
);
952 /* Safely append new history entries to the history file in a corruption-free
953 way using an intermediate local history file. */
956 gdb_safe_append_history (void)
958 int ret
, saved_errno
;
959 char *local_history_filename
;
960 struct cleanup
*old_chain
;
962 local_history_filename
963 = xstrprintf ("%s-gdb%d~", history_filename
, getpid ());
964 old_chain
= make_cleanup (xfree
, local_history_filename
);
966 ret
= rename (history_filename
, local_history_filename
);
968 if (ret
< 0 && saved_errno
!= ENOENT
)
970 warning (_("Could not rename %s to %s: %s"),
971 history_filename
, local_history_filename
,
972 safe_strerror (saved_errno
));
978 /* If the rename failed with ENOENT then either the global history
979 file never existed in the first place or another GDB process is
980 currently appending to it (and has thus temporarily renamed it).
981 Since we can't distinguish between these two cases, we have to
982 conservatively assume the first case and therefore must write out
983 (not append) our known history to our local history file and try
984 to move it back anyway. Otherwise a global history file would
985 never get created! */
986 gdb_assert (saved_errno
== ENOENT
);
987 write_history (local_history_filename
);
991 append_history (command_count
, local_history_filename
);
992 if (history_is_stifled ())
993 history_truncate_file (local_history_filename
, history_max_entries
);
996 ret
= rename (local_history_filename
, history_filename
);
998 if (ret
< 0 && saved_errno
!= EEXIST
)
999 warning (_("Could not rename %s to %s: %s"),
1000 local_history_filename
, history_filename
,
1001 safe_strerror (saved_errno
));
1004 do_cleanups (old_chain
);
1007 /* Read one line from the command input stream `instream'
1008 into the local static buffer `linebuffer' (whose current length
1010 The buffer is made bigger as necessary.
1011 Returns the address of the start of the line.
1013 NULL is returned for end of file.
1015 *If* the instream == stdin & stdin is a terminal, the line read
1016 is copied into the file line saver (global var char *line,
1017 length linesize) so that it can be duplicated.
1019 This routine either uses fancy command line editing or
1020 simple input as the user has requested. */
1023 command_line_input (const char *prompt_arg
, int repeat
, char *annotation_suffix
)
1025 static char *linebuffer
= 0;
1026 static unsigned linelength
= 0;
1027 const char *prompt
= prompt_arg
;
1034 /* The annotation suffix must be non-NULL. */
1035 if (annotation_suffix
== NULL
)
1036 annotation_suffix
= "";
1038 if (annotation_level
> 1 && instream
== stdin
)
1042 local_prompt
= alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1043 + strlen (annotation_suffix
) + 40);
1045 local_prompt
[0] = '\0';
1047 strcpy (local_prompt
, prompt
);
1048 strcat (local_prompt
, "\n\032\032");
1049 strcat (local_prompt
, annotation_suffix
);
1050 strcat (local_prompt
, "\n");
1052 prompt
= local_prompt
;
1055 if (linebuffer
== 0)
1058 linebuffer
= (char *) xmalloc (linelength
);
1063 /* Control-C quits instantly if typed while in this loop
1064 since it should not wait until the user types a newline. */
1069 signal (STOP_SIGNAL
, handle_stop_sig
);
1074 /* Make sure that all output has been output. Some machines may
1075 let you get away with leaving out some of the gdb_flush, but
1078 gdb_flush (gdb_stdout
);
1079 gdb_flush (gdb_stderr
);
1081 if (source_file_name
!= NULL
)
1082 ++source_line_number
;
1084 if (annotation_level
> 1 && instream
== stdin
)
1086 puts_unfiltered ("\n\032\032pre-");
1087 puts_unfiltered (annotation_suffix
);
1088 puts_unfiltered ("\n");
1091 /* Don't use fancy stuff if not talking to stdin. */
1092 if (deprecated_readline_hook
&& input_from_terminal_p ())
1094 rl
= (*deprecated_readline_hook
) (prompt
);
1096 else if (command_editing_p
&& input_from_terminal_p ())
1098 rl
= gdb_readline_wrapper (prompt
);
1102 rl
= gdb_readline (prompt
);
1105 if (annotation_level
> 1 && instream
== stdin
)
1107 puts_unfiltered ("\n\032\032post-");
1108 puts_unfiltered (annotation_suffix
);
1109 puts_unfiltered ("\n");
1112 if (!rl
|| rl
== (char *) EOF
)
1117 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
1119 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
1120 nline
= (char *) xrealloc (linebuffer
, linelength
);
1121 p
+= nline
- linebuffer
;
1125 /* Copy line. Don't copy null at end. (Leaves line alone
1126 if this was just a newline). */
1130 xfree (rl
); /* Allocated in readline. */
1132 if (p
== linebuffer
|| *(p
- 1) != '\\')
1135 p
--; /* Put on top of '\'. */
1141 signal (STOP_SIGNAL
, SIG_DFL
);
1148 #define SERVER_COMMAND_LENGTH 7
1150 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1151 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1154 /* Note that we don't set `line'. Between this and the check in
1155 dont_repeat, this insures that repeating will still do the
1158 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1161 /* Do history expansion if that is wished. */
1162 if (history_expansion_p
&& instream
== stdin
1163 && ISATTY (instream
))
1165 char *history_value
;
1168 *p
= '\0'; /* Insert null now. */
1169 expanded
= history_expand (linebuffer
, &history_value
);
1172 /* Print the changes. */
1173 printf_unfiltered ("%s\n", history_value
);
1175 /* If there was an error, call this function again. */
1178 xfree (history_value
);
1179 return command_line_input (prompt
, repeat
,
1182 if (strlen (history_value
) > linelength
)
1184 linelength
= strlen (history_value
) + 1;
1185 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1187 strcpy (linebuffer
, history_value
);
1188 p
= linebuffer
+ strlen (linebuffer
);
1190 xfree (history_value
);
1193 /* If we just got an empty line, and that is supposed to repeat the
1194 previous command, return the value in the global buffer. */
1195 if (repeat
&& p
== linebuffer
)
1196 return saved_command_line
;
1197 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1199 return saved_command_line
;
1203 /* Add line to history if appropriate. */
1204 if (*linebuffer
&& input_from_terminal_p ())
1205 gdb_add_history (linebuffer
);
1207 /* Save into global buffer if appropriate. */
1210 if (linelength
> saved_command_line_size
)
1212 saved_command_line
= xrealloc (saved_command_line
, linelength
);
1213 saved_command_line_size
= linelength
;
1215 strcpy (saved_command_line
, linebuffer
);
1216 return saved_command_line
;
1222 /* Print the GDB banner. */
1224 print_gdb_version (struct ui_file
*stream
)
1226 /* From GNU coding standards, first line is meant to be easy for a
1227 program to parse, and is just canonical program name and version
1228 number, which starts after last space. */
1230 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1232 /* Second line is a copyright notice. */
1234 fprintf_filtered (stream
,
1235 "Copyright (C) 2015 Free Software Foundation, Inc.\n");
1237 /* Following the copyright is a brief statement that the program is
1238 free software, that users are free to copy and change it on
1239 certain conditions, that it is covered by the GNU GPL, and that
1240 there is no warranty. */
1242 fprintf_filtered (stream
, "\
1243 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1244 \nThis is free software: you are free to change and redistribute it.\n\
1245 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1246 and \"show warranty\" for details.\n");
1248 /* After the required info we print the configuration information. */
1250 fprintf_filtered (stream
, "This GDB was configured as \"");
1251 if (strcmp (host_name
, target_name
) != 0)
1253 fprintf_filtered (stream
, "--host=%s --target=%s",
1254 host_name
, target_name
);
1258 fprintf_filtered (stream
, "%s", host_name
);
1260 fprintf_filtered (stream
, "\".\n\
1261 Type \"show configuration\" for configuration details.");
1263 if (REPORT_BUGS_TO
[0])
1265 fprintf_filtered (stream
,
1266 _("\nFor bug reporting instructions, please see:\n"));
1267 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1269 fprintf_filtered (stream
,
1270 _("Find the GDB manual and other documentation \
1271 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1272 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1273 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1274 commands related to \"word\"."));
1277 /* Print the details of GDB build-time configuration. */
1279 print_gdb_configuration (struct ui_file
*stream
)
1281 fprintf_filtered (stream
, _("\
1282 This GDB was configured as follows:\n\
1283 configure --host=%s --target=%s\n\
1284 "), host_name
, target_name
);
1285 fprintf_filtered (stream
, _("\
1286 --with-auto-load-dir=%s\n\
1287 --with-auto-load-safe-path=%s\n\
1288 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1290 fprintf_filtered (stream
, _("\
1294 fprintf_filtered (stream
, _("\
1299 fprintf_filtered (stream
, _("\
1300 --with-gdb-datadir=%s%s\n\
1301 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1303 fprintf_filtered (stream
, _("\
1304 --with-iconv-bin=%s%s\n\
1305 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1307 if (JIT_READER_DIR
[0])
1308 fprintf_filtered (stream
, _("\
1309 --with-jit-reader-dir=%s%s\n\
1310 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1311 #if HAVE_LIBUNWIND_IA64_H
1312 fprintf_filtered (stream
, _("\
1313 --with-libunwind-ia64\n\
1316 fprintf_filtered (stream
, _("\
1317 --without-libunwind-ia64\n\
1321 fprintf_filtered (stream
, _("\
1325 fprintf_filtered (stream
, _("\
1329 #ifdef WITH_PYTHON_PATH
1330 fprintf_filtered (stream
, _("\
1331 --with-python=%s%s\n\
1332 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1335 fprintf_filtered (stream
, _("\
1339 fprintf_filtered (stream
, _("\
1344 fprintf_filtered (stream
, _("\
1345 --with-relocated-sources=%s\n\
1349 fprintf_filtered (stream
, _("\
1350 --with-separate-debug-dir=%s%s\n\
1351 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1352 if (TARGET_SYSTEM_ROOT
[0])
1353 fprintf_filtered (stream
, _("\
1354 --with-sysroot=%s%s\n\
1355 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1356 if (SYSTEM_GDBINIT
[0])
1357 fprintf_filtered (stream
, _("\
1358 --with-system-gdbinit=%s%s\n\
1359 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1360 #if HAVE_LIBBABELTRACE
1361 fprintf_filtered (stream
, _("\
1362 --with-babeltrace\n\
1365 fprintf_filtered (stream
, _("\
1366 --without-babeltrace\n\
1369 /* We assume "relocatable" will be printed at least once, thus we always
1370 print this text. It's a reasonably safe assumption for now. */
1371 fprintf_filtered (stream
, _("\n\
1372 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1373 tree, and GDB will still find it.)\n\
1378 /* The current top level prompt, settable with "set prompt", and/or
1379 with the python `gdb.prompt_hook' hook. */
1380 static char *top_prompt
;
1382 /* Access method for the GDB prompt string. */
1390 /* Set method for the GDB prompt string. */
1393 set_prompt (const char *s
)
1395 char *p
= xstrdup (s
);
1408 /* Callback for iterate_over_inferiors. Kills or detaches the given
1409 inferior, depending on how we originally gained control of it. */
1412 kill_or_detach (struct inferior
*inf
, void *args
)
1414 struct qt_args
*qt
= args
;
1415 struct thread_info
*thread
;
1420 thread
= any_thread_of_process (inf
->pid
);
1423 switch_to_thread (thread
->ptid
);
1425 /* Leave core files alone. */
1426 if (target_has_execution
)
1428 if (inf
->attach_flag
)
1429 target_detach (qt
->args
, qt
->from_tty
);
1438 /* Callback for iterate_over_inferiors. Prints info about what GDB
1439 will do to each inferior on a "quit". ARG points to a struct
1440 ui_out where output is to be collected. */
1443 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1445 struct ui_file
*stb
= arg
;
1450 if (inf
->attach_flag
)
1451 fprintf_filtered (stb
,
1452 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1453 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1455 fprintf_filtered (stb
,
1456 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1457 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1462 /* If necessary, make the user confirm that we should quit. Return
1463 non-zero if we should quit, zero if we shouldn't. */
1468 struct ui_file
*stb
;
1469 struct cleanup
*old_chain
;
1473 /* Don't even ask if we're only debugging a core file inferior. */
1474 if (!have_live_inferiors ())
1477 /* Build the query string as a single string. */
1478 stb
= mem_fileopen ();
1479 old_chain
= make_cleanup_ui_file_delete (stb
);
1481 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1482 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1483 fprintf_filtered (stb
, _("\nQuit anyway? "));
1485 str
= ui_file_xstrdup (stb
, NULL
);
1486 make_cleanup (xfree
, str
);
1488 qr
= query ("%s", str
);
1489 do_cleanups (old_chain
);
1493 /* Prepare to exit GDB cleanly by undoing any changes made to the
1494 terminal so that we leave the terminal in the state we acquired it. */
1497 undo_terminal_modifications_before_exit (void)
1499 target_terminal_ours ();
1503 if (async_command_editing_p
)
1504 gdb_disable_readline ();
1508 /* Quit without asking for confirmation. */
1511 quit_force (char *args
, int from_tty
)
1516 undo_terminal_modifications_before_exit ();
1518 /* An optional expression may be used to cause gdb to terminate with the
1519 value of that expression. */
1522 struct value
*val
= parse_and_eval (args
);
1524 exit_code
= (int) value_as_long (val
);
1526 else if (return_child_result
)
1527 exit_code
= return_child_result_value
;
1530 qt
.from_tty
= from_tty
;
1532 /* We want to handle any quit errors and exit regardless. */
1534 /* Get out of tfind mode, and kill or detach all inferiors. */
1537 disconnect_tracing ();
1538 iterate_over_inferiors (kill_or_detach
, &qt
);
1540 CATCH (ex
, RETURN_MASK_ALL
)
1542 exception_print (gdb_stderr
, ex
);
1546 /* Give all pushed targets a chance to do minimal cleanup, and pop
1552 CATCH (ex
, RETURN_MASK_ALL
)
1554 exception_print (gdb_stderr
, ex
);
1558 /* Save the history information if it is appropriate to do so. */
1561 if (write_history_p
&& history_filename
1562 && input_from_terminal_p ())
1563 gdb_safe_append_history ();
1565 CATCH (ex
, RETURN_MASK_ALL
)
1567 exception_print (gdb_stderr
, ex
);
1571 /* Do any final cleanups before exiting. */
1574 do_final_cleanups (all_cleanups ());
1576 CATCH (ex
, RETURN_MASK_ALL
)
1578 exception_print (gdb_stderr
, ex
);
1585 /* Returns whether GDB is running on a terminal and input is
1586 currently coming from that terminal. */
1589 input_from_terminal_p (void)
1594 if (gdb_has_a_terminal () && instream
== stdin
)
1597 /* If INSTREAM is unset, and we are not in a user command, we
1598 must be in Insight. That's like having a terminal, for our
1600 if (instream
== NULL
&& !in_user_command
)
1607 dont_repeat_command (char *ignored
, int from_tty
)
1609 /* Can't call dont_repeat here because we're not necessarily reading
1611 *saved_command_line
= 0;
1614 /* Functions to manipulate command line editing control variables. */
1616 /* Number of commands to print in each call to show_commands. */
1617 #define Hist_print 10
1619 show_commands (char *args
, int from_tty
)
1621 /* Index for history commands. Relative to history_base. */
1624 /* Number of the history entry which we are planning to display next.
1625 Relative to history_base. */
1628 /* Print out some of the commands from the command history. */
1632 if (args
[0] == '+' && args
[1] == '\0')
1633 /* "info editing +" should print from the stored position. */
1636 /* "info editing <exp>" should print around command number <exp>. */
1637 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1639 /* "show commands" means print the last Hist_print commands. */
1642 num
= history_length
- Hist_print
;
1648 /* If there are at least Hist_print commands, we want to display the last
1649 Hist_print rather than, say, the last 6. */
1650 if (history_length
- num
< Hist_print
)
1652 num
= history_length
- Hist_print
;
1658 offset
< num
+ Hist_print
&& offset
< history_length
;
1661 printf_filtered ("%5d %s\n", history_base
+ offset
,
1662 (history_get (history_base
+ offset
))->line
);
1665 /* The next command we want to display is the next one that we haven't
1669 /* If the user repeats this command with return, it should do what
1670 "show commands +" does. This is unnecessary if arg is null,
1671 because "show commands +" is not useful after "show commands". */
1672 if (from_tty
&& args
)
1679 /* Update the size of our command history file to HISTORY_SIZE.
1681 A HISTORY_SIZE of -1 stands for unlimited. */
1684 set_readline_history_size (int history_size
)
1686 gdb_assert (history_size
>= -1);
1688 if (history_size
== -1)
1689 unstifle_history ();
1691 stifle_history (history_size
);
1694 /* Called by do_setshow_command. */
1696 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1698 set_readline_history_size (history_size_setshow_var
);
1702 set_history (char *args
, int from_tty
)
1704 printf_unfiltered (_("\"set history\" must be followed "
1705 "by the name of a history subcommand.\n"));
1706 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1710 show_history (char *args
, int from_tty
)
1712 cmd_show_list (showhistlist
, from_tty
, "");
1715 int info_verbose
= 0; /* Default verbose msgs off. */
1717 /* Called by do_setshow_command. An elaborate joke. */
1719 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1721 const char *cmdname
= "verbose";
1722 struct cmd_list_element
*showcmd
;
1724 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1725 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1729 c
->doc
= "Set verbose printing of informational messages.";
1730 showcmd
->doc
= "Show verbose printing of informational messages.";
1734 c
->doc
= "Set verbosity.";
1735 showcmd
->doc
= "Show verbosity.";
1739 /* Init the history buffer. Note that we are called after the init file(s)
1740 have been read so that the user can change the history file via his
1741 .gdbinit file (for instance). The GDBHISTFILE environment variable
1742 overrides all of this. */
1749 tmpenv
= getenv ("GDBHISTSIZE");
1756 tmpenv
= skip_spaces (tmpenv
);
1758 var
= strtol (tmpenv
, &endptr
, 10);
1759 saved_errno
= errno
;
1760 endptr
= skip_spaces (endptr
);
1762 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1763 empty string, a negative number or a huge positive number (larger than
1764 INT_MAX) then set the history size to unlimited. Otherwise set our
1765 history size to the number we have read. This behavior is consistent
1766 with how bash handles HISTSIZE. */
1767 if (*endptr
!= '\0')
1769 else if (*tmpenv
== '\0'
1772 /* On targets where INT_MAX == LONG_MAX, we have to look at
1773 errno after calling strtol to distinguish between a value that
1774 is exactly INT_MAX and an overflowing value that was clamped
1776 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1777 history_size_setshow_var
= -1;
1779 history_size_setshow_var
= var
;
1782 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1784 if (history_size_setshow_var
== -2)
1785 history_size_setshow_var
= 256;
1787 set_readline_history_size (history_size_setshow_var
);
1789 tmpenv
= getenv ("GDBHISTFILE");
1791 history_filename
= xstrdup (tmpenv
);
1792 else if (!history_filename
)
1794 /* We include the current directory so that if the user changes
1795 directories the file written will be the same as the one
1798 /* No leading dots in file names are allowed on MSDOS. */
1799 history_filename
= concat (current_directory
, "/_gdb_history",
1802 history_filename
= concat (current_directory
, "/.gdb_history",
1806 read_history (history_filename
);
1810 show_prompt (struct ui_file
*file
, int from_tty
,
1811 struct cmd_list_element
*c
, const char *value
)
1813 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1817 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1818 struct cmd_list_element
*c
, const char *value
)
1820 fprintf_filtered (file
, _("Editing of command lines as "
1821 "they are typed is %s.\n"),
1826 show_annotation_level (struct ui_file
*file
, int from_tty
,
1827 struct cmd_list_element
*c
, const char *value
)
1829 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1833 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1834 struct cmd_list_element
*c
, const char *value
)
1836 fprintf_filtered (file
, _("Notification of completion for "
1837 "asynchronous execution commands is %s.\n"),
1841 /* New values of the "data-directory" parameter are staged here. */
1842 static char *staged_gdb_datadir
;
1844 /* "set" command for the gdb_datadir configuration variable. */
1847 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1849 set_gdb_data_directory (staged_gdb_datadir
);
1850 observer_notify_gdb_datadir_changed ();
1853 /* "show" command for the gdb_datadir configuration variable. */
1856 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
1857 struct cmd_list_element
*c
, const char *value
)
1859 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
1864 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
1866 /* We include the current directory so that if the user changes
1867 directories the file written will be the same as the one
1869 if (!IS_ABSOLUTE_PATH (history_filename
))
1870 history_filename
= reconcat (history_filename
, current_directory
, "/",
1871 history_filename
, (char *) NULL
);
1877 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1878 the DEFAULT_PROMPT is. */
1879 set_prompt (DEFAULT_PROMPT
);
1881 /* Set things up for annotation_level > 1, if the user ever decides
1883 async_annotation_suffix
= "prompt";
1885 /* Set the important stuff up for command editing. */
1886 command_editing_p
= 1;
1887 history_expansion_p
= 0;
1888 write_history_p
= 0;
1890 /* Setup important stuff for command line editing. */
1891 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1892 rl_completion_entry_function
= readline_line_completion_function
;
1893 rl_completer_word_break_characters
= default_word_break_characters ();
1894 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1895 rl_completion_display_matches_hook
= cli_display_match_list
;
1896 rl_readline_name
= "gdb";
1897 rl_terminal_name
= getenv ("TERM");
1899 /* The name for this defun comes from Bash, where it originated.
1900 15 is Control-o, the same binding this function has in Bash. */
1901 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1903 add_setshow_string_cmd ("prompt", class_support
,
1905 _("Set gdb's prompt"),
1906 _("Show gdb's prompt"),
1909 &setlist
, &showlist
);
1911 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1912 Don't repeat this command.\nPrimarily \
1913 used inside of user-defined commands that should not be repeated when\n\
1916 add_setshow_boolean_cmd ("editing", class_support
,
1917 &async_command_editing_p
, _("\
1918 Set editing of command lines as they are typed."), _("\
1919 Show editing of command lines as they are typed."), _("\
1920 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1921 Without an argument, command line editing is enabled. To edit, use\n\
1922 EMACS-like or VI-like commands like control-P or ESC."),
1923 set_async_editing_command
,
1924 show_async_command_editing_p
,
1925 &setlist
, &showlist
);
1927 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1928 Set saving of the history record on exit."), _("\
1929 Show saving of the history record on exit."), _("\
1930 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1931 Without an argument, saving is enabled."),
1933 show_write_history_p
,
1934 &sethistlist
, &showhistlist
);
1936 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
1937 &history_size_setshow_var
, _("\
1938 Set the size of the command history,"), _("\
1939 Show the size of the command history,"), _("\
1940 ie. the number of previous commands to keep a record of.\n\
1941 If set to \"unlimited\", the number of commands kept in the history\n\
1942 list is unlimited. This defaults to the value of the environment\n\
1943 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1944 set_history_size_command
,
1946 &sethistlist
, &showhistlist
);
1948 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
1949 &history_remove_duplicates
, _("\
1950 Set how far back in history to look for and remove duplicate entries."), _("\
1951 Show how far back in history to look for and remove duplicate entries."), _("\
1952 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1953 and remove the first history entry that is a duplicate of the most recent\n\
1954 entry, each time a new history entry is added.\n\
1955 If set to \"unlimited\", this lookbehind is unbounded.\n\
1956 Only history entries added during this session are considered for removal.\n\
1957 If set to 0, removal of duplicate history entries is disabled.\n\
1958 By default this option is set to 0."),
1960 show_history_remove_duplicates
,
1961 &sethistlist
, &showhistlist
);
1963 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1964 Set the filename in which to record the command history"), _("\
1965 Show the filename in which to record the command history"), _("\
1966 (the list of previous commands of which a record is kept)."),
1967 set_history_filename
,
1968 show_history_filename
,
1969 &sethistlist
, &showhistlist
);
1971 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
1972 Set whether to confirm potentially dangerous operations."), _("\
1973 Show whether to confirm potentially dangerous operations."), NULL
,
1976 &setlist
, &showlist
);
1978 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1979 Set annotation_level."), _("\
1980 Show annotation_level."), _("\
1981 0 == normal; 1 == fullname (for use when running under emacs)\n\
1982 2 == output annotated suitably for use by programs that control GDB."),
1984 show_annotation_level
,
1985 &setlist
, &showlist
);
1987 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1988 &exec_done_display_p
, _("\
1989 Set notification of completion for asynchronous execution commands."), _("\
1990 Show notification of completion for asynchronous execution commands."), _("\
1991 Use \"on\" to enable the notification, and \"off\" to disable it."),
1993 show_exec_done_display_p
,
1994 &setlist
, &showlist
);
1996 add_setshow_filename_cmd ("data-directory", class_maintenance
,
1997 &staged_gdb_datadir
, _("Set GDB's data directory."),
1998 _("Show GDB's data directory."),
2000 When set, GDB uses the specified path to search for data files."),
2001 set_gdb_datadir
, show_gdb_datadir
,
2007 gdb_init (char *argv0
)
2009 if (pre_init_ui_hook
)
2010 pre_init_ui_hook ();
2012 /* Run the init function of each source file. */
2015 /* Make sure we return to the original directory upon exit, come
2016 what may, since the OS doesn't do that for us. */
2017 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
2020 init_cmd_lists (); /* This needs to be done first. */
2021 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2022 initialize_utils (); /* Make errors and warnings possible. */
2026 /* Here is where we call all the _initialize_foo routines. */
2027 initialize_all_files ();
2029 /* This creates the current_program_space. Do this after all the
2030 _initialize_foo routines have had a chance to install their
2031 per-sspace data keys. Also do this before
2032 initialize_current_architecture is called, because it accesses
2033 exec_bfd of the current program space. */
2034 initialize_progspace ();
2035 initialize_inferiors ();
2036 initialize_current_architecture ();
2038 init_main (); /* But that omits this file! Do it now. */
2040 initialize_stdin_serial ();
2042 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2044 set_initial_gdb_ttystate ();
2046 async_init_signals ();
2048 /* We need a default language for parsing expressions, so simple
2049 things like "set width 0" won't fail if no language is explicitly
2050 set in a config file or implicitly set by reading an executable
2052 set_language (language_c
);
2053 expected_language
= current_language
; /* Don't warn about the change. */
2055 /* Python initialization, for example, can require various commands to be
2056 installed. For example "info pretty-printer" needs the "info"
2057 prefix to be installed. Keep things simple and just do final
2058 script initialization here. */
2059 finish_ext_lang_initialization ();