1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2016 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"
55 /* readline include files. */
56 #include "readline/readline.h"
57 #include "readline/history.h"
59 /* readline defines this. */
62 #include <sys/types.h>
64 #include "event-top.h"
69 #include "tracepoint.h"
76 extern void initialize_all_files (void);
78 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
79 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
80 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
82 /* Default command line prompt. This is overriden in some configs. */
84 #ifndef DEFAULT_PROMPT
85 #define DEFAULT_PROMPT "(gdb) "
88 /* Initialization file name for gdb. This is host-dependent. */
90 const char gdbinit
[] = GDBINIT
;
92 int inhibit_gdbinit
= 0;
94 extern char lang_frame_mismatch_warn
[]; /* language.c */
96 /* Flag for whether we want to confirm potentially dangerous
97 operations. Default is yes. */
102 show_confirm (struct ui_file
*file
, int from_tty
,
103 struct cmd_list_element
*c
, const char *value
)
105 fprintf_filtered (file
, _("Whether to confirm potentially "
106 "dangerous operations is %s.\n"),
110 /* stdio stream that command input is being read from. Set to stdin
111 normally. Set by source_command to the file we are sourcing. Set
112 to NULL if we are executing a user-defined command or interacting
117 /* Flag to indicate whether a user defined command is currently running. */
121 /* Current working directory. */
123 char *current_directory
;
125 /* The directory name is actually stored here (usually). */
126 char gdb_dirbuf
[1024];
128 /* The last command line executed on the console. Used for command
130 char *saved_command_line
;
132 /* Nonzero if the current command is modified by "server ". This
133 affects things like recording into the command history, commands
134 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
135 whatever) can issue its own commands and also send along commands
136 from the user, and have the user not notice that the user interface
137 is issuing commands too. */
140 /* Timeout limit for response from target. */
142 /* The default value has been changed many times over the years. It
143 was originally 5 seconds. But that was thought to be a long time
144 to sit and wait, so it was changed to 2 seconds. That was thought
145 to be plenty unless the connection was going through some terminal
146 server or multiplexer or other form of hairy serial connection.
148 In mid-1996, remote_timeout was moved from remote.c to top.c and
149 it began being used in other remote-* targets. It appears that the
150 default was changed to 20 seconds at that time, perhaps because the
151 Renesas E7000 ICE didn't always respond in a timely manner.
153 But if 5 seconds is a long time to sit and wait for retransmissions,
154 20 seconds is far worse. This demonstrates the difficulty of using
155 a single variable for all protocol timeouts.
157 As remote.c is used much more than remote-e7000.c, it was changed
158 back to 2 seconds in 1999. */
160 int remote_timeout
= 2;
162 /* Non-zero tells remote* modules to output debugging info. */
164 int remote_debug
= 0;
166 /* Sbrk location on entry to main. Used for statistics only. */
171 /* Hooks for alternate command interfaces. */
173 /* This hook is called from within gdb's many mini-event loops which
174 could steal control from a real user interface's event loop. It
175 returns non-zero if the user is requesting a detach, zero
178 int (*deprecated_ui_loop_hook
) (int);
181 /* Called from print_frame_info to list the line we stopped in. */
183 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
,
187 /* Replaces most of query. */
189 int (*deprecated_query_hook
) (const char *, va_list);
191 /* Replaces most of warning. */
193 void (*deprecated_warning_hook
) (const char *, va_list);
195 /* These three functions support getting lines of text from the user.
196 They are used in sequence. First deprecated_readline_begin_hook is
197 called with a text string that might be (for example) a message for
198 the user to type in a sequence of commands to be executed at a
199 breakpoint. If this function calls back to a GUI, it might take
200 this opportunity to pop up a text interaction window with this
201 message. Next, deprecated_readline_hook is called with a prompt
202 that is emitted prior to collecting the user input. It can be
203 called multiple times. Finally, deprecated_readline_end_hook is
204 called to notify the GUI that we are done with the interaction
205 window and it can close it. */
207 void (*deprecated_readline_begin_hook
) (char *, ...);
208 char *(*deprecated_readline_hook
) (const char *);
209 void (*deprecated_readline_end_hook
) (void);
211 /* Called as appropriate to notify the interface that we have attached
212 to or detached from an already running process. */
214 void (*deprecated_attach_hook
) (void);
215 void (*deprecated_detach_hook
) (void);
217 /* Called during long calculations to allow GUI to repair window
218 damage, and to check for stop buttons, etc... */
220 void (*deprecated_interactive_hook
) (void);
222 /* Called when going to wait for the target. Usually allows the GUI
223 to run while waiting for target events. */
225 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
226 struct target_waitstatus
*status
,
229 /* Used by UI as a wrapper around command execution. May do various
230 things like enabling/disabling buttons, etc... */
232 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
,
233 char *cmd
, int from_tty
);
235 /* Called when the current thread changes. Argument is thread id. */
237 void (*deprecated_context_hook
) (int id
);
239 /* Handler for SIGHUP. */
242 /* NOTE 1999-04-29: This function will be static again, once we modify
243 gdb to use the event loop as the default command loop and we merge
244 event-top.c into this file, top.c. */
248 /* Stop asking user for confirmation --- we're exiting. This
249 prevents asking the user dumb questions. */
251 quit_command ((char *) 0, 0);
253 #endif /* defined SIGHUP */
255 /* Line number we are currently in, in a file which is being sourced. */
256 /* NOTE 1999-04-29: This variable will be static again, once we modify
257 gdb to use the event loop as the default command loop and we merge
258 event-top.c into this file, top.c. */
259 /* static */ int source_line_number
;
261 /* Name of the file we are sourcing. */
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 */ const char *source_file_name
;
267 /* Clean up on error during a "source" command (or execution of a
268 user-defined command). */
271 do_restore_instream_cleanup (void *stream
)
273 /* Restore the previous input stream. */
274 instream
= (FILE *) stream
;
277 /* Read commands from STREAM. */
279 read_command_file (FILE *stream
)
281 struct cleanup
*cleanups
;
283 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
286 do_cleanups (cleanups
);
289 void (*pre_init_ui_hook
) (void);
293 do_chdir_cleanup (void *old_dir
)
301 prepare_execute_command (void)
304 struct cleanup
*cleanup
;
306 mark
= value_mark ();
307 cleanup
= make_cleanup_value_free_to_mark (mark
);
309 /* With multiple threads running while the one we're examining is
310 stopped, the dcache can get stale without us being able to detect
311 it. For the duration of the command, though, use the dcache to
312 help things like backtrace. */
314 target_dcache_invalidate ();
319 /* Tell the user if the language has changed (except first time) after
320 executing a command. */
323 check_frame_language_change (void)
325 static int warned
= 0;
326 struct frame_info
*frame
;
328 /* First make sure that a new frame has been selected, in case the
329 command or the hooks changed the program state. */
330 frame
= deprecated_safe_get_selected_frame ();
331 if (current_language
!= expected_language
)
333 if (language_mode
== language_mode_auto
&& info_verbose
)
335 language_info (1); /* Print what changed. */
340 /* Warn the user if the working language does not match the language
341 of the current frame. Only warn the user if we are actually
342 running the program, i.e. there is a stack. */
343 /* FIXME: This should be cacheing the frame and only running when
344 the frame changes. */
346 if (has_stack_frames ())
350 flang
= get_frame_language (frame
);
352 && flang
!= language_unknown
353 && flang
!= current_language
->la_language
)
355 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
364 wait_sync_command_done (void)
366 while (gdb_do_one_event () >= 0)
374 maybe_wait_sync_command_done (int was_sync
)
376 /* If the interpreter is in sync mode (we're running a user
377 command's list, running command hooks or similars), and we
378 just ran a synchronous command that started the target, wait
379 for that command to end. */
380 if (!interpreter_async
&& !was_sync
&& sync_execution
)
381 wait_sync_command_done ();
384 /* Execute the line P as a command, in the current user context.
385 Pass FROM_TTY as second argument to the defining function. */
388 execute_command (char *p
, int from_tty
)
390 struct cleanup
*cleanup_if_error
, *cleanup
;
391 struct cmd_list_element
*c
;
394 cleanup_if_error
= make_bpstat_clear_actions_cleanup ();
395 cleanup
= prepare_execute_command ();
397 /* Force cleanup of any alloca areas if using C alloca instead of
401 /* This can happen when command_line_input hits end of file. */
404 do_cleanups (cleanup
);
405 discard_cleanups (cleanup_if_error
);
409 target_log_command (p
);
411 while (*p
== ' ' || *p
== '\t')
417 int was_sync
= sync_execution
;
421 /* If trace-commands is set then this will print this command. */
422 print_command_trace (p
);
424 c
= lookup_cmd (&cmd
, cmdlist
, "", 0, 1);
427 /* Pass null arg rather than an empty one. */
430 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
431 while the is_complete_command(cfunc) test is just plain
432 bogus. They should both be replaced by a test of the form
433 c->strip_trailing_white_space_p. */
434 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
435 can't be replaced with func. This is because it is the
436 cfunc, and not the func, that has the value that the
437 is_complete_command hack is testing for. */
438 /* Clear off trailing whitespace, except for set and complete
441 && c
->type
!= set_cmd
442 && !is_complete_command (c
))
444 p
= arg
+ strlen (arg
) - 1;
445 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
450 /* If this command has been pre-hooked, run the hook first. */
451 execute_cmd_pre_hook (c
);
453 if (c
->deprecated_warn_user
)
454 deprecated_cmd_warning (line
);
456 /* c->user_commands would be NULL in the case of a python command. */
457 if (c
->theclass
== class_user
&& c
->user_commands
)
458 execute_user_command (c
, arg
);
459 else if (c
->type
== set_cmd
)
460 do_set_command (arg
, from_tty
, c
);
461 else if (c
->type
== show_cmd
)
462 do_show_command (arg
, from_tty
, c
);
463 else if (!cmd_func_p (c
))
464 error (_("That is not a command, just a help topic."));
465 else if (deprecated_call_command_hook
)
466 deprecated_call_command_hook (c
, arg
, from_tty
);
468 cmd_func (c
, arg
, from_tty
);
470 maybe_wait_sync_command_done (was_sync
);
472 /* If this command has been post-hooked, run the hook last. */
473 execute_cmd_post_hook (c
);
477 check_frame_language_change ();
479 do_cleanups (cleanup
);
480 discard_cleanups (cleanup_if_error
);
483 /* Run execute_command for P and FROM_TTY. Capture its output into the
484 returned string, do not display it to the screen. BATCH_FLAG will be
485 temporarily set to true. */
488 execute_command_to_string (char *p
, int from_tty
)
490 struct ui_file
*str_file
;
491 struct cleanup
*cleanup
;
494 /* GDB_STDOUT should be better already restored during these
495 restoration callbacks. */
496 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
498 make_cleanup_restore_integer (&interpreter_async
);
499 interpreter_async
= 0;
501 str_file
= mem_fileopen ();
503 make_cleanup_ui_file_delete (str_file
);
504 make_cleanup_restore_ui_file (&gdb_stdout
);
505 make_cleanup_restore_ui_file (&gdb_stderr
);
506 make_cleanup_restore_ui_file (&gdb_stdlog
);
507 make_cleanup_restore_ui_file (&gdb_stdtarg
);
508 make_cleanup_restore_ui_file (&gdb_stdtargerr
);
510 if (ui_out_redirect (current_uiout
, str_file
) < 0)
511 warning (_("Current output protocol does not support redirection"));
513 make_cleanup_ui_out_redirect_pop (current_uiout
);
515 gdb_stdout
= str_file
;
516 gdb_stderr
= str_file
;
517 gdb_stdlog
= str_file
;
518 gdb_stdtarg
= str_file
;
519 gdb_stdtargerr
= str_file
;
521 execute_command (p
, from_tty
);
523 retval
= ui_file_xstrdup (str_file
, NULL
);
525 do_cleanups (cleanup
);
530 /* Read commands from `instream' and execute them
531 until end of file or error reading instream. */
536 while (instream
&& !feof (instream
))
540 /* Get a command-line. This calls the readline package. */
541 command
= command_line_input (instream
== stdin
?
542 get_prompt () : (char *) NULL
,
543 instream
== stdin
, "prompt");
546 command_handler (command
);
550 /* When nonzero, cause dont_repeat to do nothing. This should only be
551 set via prevent_dont_repeat. */
553 static int suppress_dont_repeat
= 0;
555 /* Commands call this if they do not want to be repeated by null lines. */
560 if (suppress_dont_repeat
|| server_command
)
563 /* If we aren't reading from standard input, we are saving the last
564 thing read from stdin in line and don't want to delete it. Null
565 lines won't repeat here in any case. */
566 if (instream
== stdin
)
567 *saved_command_line
= 0;
570 /* Prevent dont_repeat from working, and return a cleanup that
571 restores the previous state. */
574 prevent_dont_repeat (void)
576 struct cleanup
*result
= make_cleanup_restore_integer (&suppress_dont_repeat
);
578 suppress_dont_repeat
= 1;
583 /* Read a line from the stream "instream" without command line editing.
585 It prints PROMPT once at the start.
586 Action is compatible with "readline", e.g. space for the result is
587 malloc'd and should be freed by the caller.
589 A NULL return means end of file. */
592 gdb_readline_no_editing (const char *prompt
)
594 struct buffer line_buffer
;
596 buffer_init (&line_buffer
);
600 /* Don't use a _filtered function here. It causes the assumed
601 character position to be off, since the newline we read from
602 the user is not accounted for. */
603 fputs_unfiltered (prompt
, gdb_stdout
);
604 gdb_flush (gdb_stdout
);
611 /* Read from stdin if we are executing a user defined command.
612 This is the right thing for prompt_for_continue, at least. */
613 c
= fgetc (instream
? instream
: stdin
);
617 if (line_buffer
.used_size
> 0)
618 /* The last line does not end with a newline. Return it, and
619 if we are called again fgetc will still return EOF and
620 we'll return NULL then. */
622 xfree (buffer_finish (&line_buffer
));
628 if (line_buffer
.used_size
> 0
629 && line_buffer
.buffer
[line_buffer
.used_size
- 1] == '\r')
630 line_buffer
.used_size
--;
634 buffer_grow_char (&line_buffer
, c
);
637 buffer_grow_char (&line_buffer
, '\0');
638 return buffer_finish (&line_buffer
);
641 /* Variables which control command line editing and history
642 substitution. These variables are given default values at the end
644 static int command_editing_p
;
646 /* NOTE 1999-04-29: This variable will be static again, once we modify
647 gdb to use the event loop as the default command loop and we merge
648 event-top.c into this file, top.c. */
650 /* static */ int history_expansion_p
;
652 static int write_history_p
;
654 show_write_history_p (struct ui_file
*file
, int from_tty
,
655 struct cmd_list_element
*c
, const char *value
)
657 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
661 /* The variable associated with the "set/show history size"
662 command. The value -1 means unlimited, and -2 means undefined. */
663 static int history_size_setshow_var
= -2;
666 show_history_size (struct ui_file
*file
, int from_tty
,
667 struct cmd_list_element
*c
, const char *value
)
669 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
673 /* Variable associated with the "history remove-duplicates" option.
674 The value -1 means unlimited. */
675 static int history_remove_duplicates
= 0;
678 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
679 struct cmd_list_element
*c
, const char *value
)
681 fprintf_filtered (file
,
682 _("The number of history entries to look back at for "
683 "duplicates is %s.\n"),
687 static char *history_filename
;
689 show_history_filename (struct ui_file
*file
, int from_tty
,
690 struct cmd_list_element
*c
, const char *value
)
692 fprintf_filtered (file
, _("The filename in which to record "
693 "the command history is \"%s\".\n"),
697 /* This is like readline(), but it has some gdb-specific behavior.
698 gdb may want readline in both the synchronous and async modes during
699 a single gdb invocation. At the ordinary top-level prompt we might
700 be using the async readline. That means we can't use
701 rl_pre_input_hook, since it doesn't work properly in async mode.
702 However, for a secondary prompt (" >", such as occurs during a
703 `define'), gdb wants a synchronous response.
705 We used to call readline() directly, running it in synchronous
706 mode. But mixing modes this way is not supported, and as of
707 readline 5.x it no longer works; the arrow keys come unbound during
708 the synchronous call. So we make a nested call into the event
709 loop. That's what gdb_readline_wrapper is for. */
711 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
712 rely on gdb_readline_wrapper_result, which might still be NULL if
713 the user types Control-D for EOF. */
714 static int gdb_readline_wrapper_done
;
716 /* The result of the current call to gdb_readline_wrapper, once a newline
718 static char *gdb_readline_wrapper_result
;
720 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
721 to be called after the newline is processed (which will redisplay
722 the prompt). But in gdb_readline_wrapper we will not get a new
723 prompt until the next call, or until we return to the event loop.
724 So we disable this hook around the newline and restore it before we
726 static void (*saved_after_char_processing_hook
) (void);
729 /* The number of nested readline secondary prompts that are currently
732 static int gdb_secondary_prompt_depth
= 0;
737 gdb_in_secondary_prompt_p (void)
739 return gdb_secondary_prompt_depth
> 0;
743 /* This function is called when readline has seen a complete line of
747 gdb_readline_wrapper_line (char *line
)
749 gdb_assert (!gdb_readline_wrapper_done
);
750 gdb_readline_wrapper_result
= line
;
751 gdb_readline_wrapper_done
= 1;
753 /* Prevent operate-and-get-next from acting too early. */
754 saved_after_char_processing_hook
= after_char_processing_hook
;
755 after_char_processing_hook
= NULL
;
757 /* Prevent parts of the prompt from being redisplayed if annotations
758 are enabled, and readline's state getting out of sync. We'll
759 reinstall the callback handler, which puts the terminal in raw
760 mode (or in readline lingo, in prepped state), when we're next
761 ready to process user input, either in display_gdb_prompt, or if
762 we're handling an asynchronous target event and running in the
763 background, just before returning to the event loop to process
764 further input (or more target events). */
765 if (async_command_editing_p
)
766 gdb_rl_callback_handler_remove ();
769 struct gdb_readline_wrapper_cleanup
771 void (*handler_orig
) (char *);
772 int already_prompted_orig
;
774 /* Whether the target was async. */
775 int target_is_async_orig
;
779 gdb_readline_wrapper_cleanup (void *arg
)
781 struct gdb_readline_wrapper_cleanup
*cleanup
782 = (struct gdb_readline_wrapper_cleanup
*) arg
;
784 rl_already_prompted
= cleanup
->already_prompted_orig
;
786 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
787 input_handler
= cleanup
->handler_orig
;
789 /* Don't restore our input handler in readline yet. That would make
790 readline prep the terminal (putting it in raw mode), while the
791 line we just read may trigger execution of a command that expects
792 the terminal in the default cooked/canonical mode, such as e.g.,
793 running Python's interactive online help utility. See
794 gdb_readline_wrapper_line for when we'll reinstall it. */
796 gdb_readline_wrapper_result
= NULL
;
797 gdb_readline_wrapper_done
= 0;
798 gdb_secondary_prompt_depth
--;
799 gdb_assert (gdb_secondary_prompt_depth
>= 0);
801 after_char_processing_hook
= saved_after_char_processing_hook
;
802 saved_after_char_processing_hook
= NULL
;
804 if (cleanup
->target_is_async_orig
)
811 gdb_readline_wrapper (const char *prompt
)
813 struct cleanup
*back_to
;
814 struct gdb_readline_wrapper_cleanup
*cleanup
;
817 cleanup
= XNEW (struct gdb_readline_wrapper_cleanup
);
818 cleanup
->handler_orig
= input_handler
;
819 input_handler
= gdb_readline_wrapper_line
;
821 cleanup
->already_prompted_orig
= rl_already_prompted
;
823 cleanup
->target_is_async_orig
= target_is_async_p ();
825 gdb_secondary_prompt_depth
++;
826 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
828 if (cleanup
->target_is_async_orig
)
831 /* Display our prompt and prevent double prompt display. */
832 display_gdb_prompt (prompt
);
833 rl_already_prompted
= 1;
835 if (after_char_processing_hook
)
836 (*after_char_processing_hook
) ();
837 gdb_assert (after_char_processing_hook
== NULL
);
839 while (gdb_do_one_event () >= 0)
840 if (gdb_readline_wrapper_done
)
843 retval
= gdb_readline_wrapper_result
;
844 do_cleanups (back_to
);
849 /* The current saved history number from operate-and-get-next.
850 This is -1 if not valid. */
851 static int operate_saved_history
= -1;
853 /* This is put on the appropriate hook and helps operate-and-get-next
856 gdb_rl_operate_and_get_next_completion (void)
858 int delta
= where_history () - operate_saved_history
;
860 /* The `key' argument to rl_get_previous_history is ignored. */
861 rl_get_previous_history (delta
, 0);
862 operate_saved_history
= -1;
864 /* readline doesn't automatically update the display for us. */
867 after_char_processing_hook
= NULL
;
868 rl_pre_input_hook
= NULL
;
871 /* This is a gdb-local readline command handler. It accepts the
872 current command line (like RET does) and, if this command was taken
873 from the history, arranges for the next command in the history to
874 appear on the command line when the prompt returns.
875 We ignore the arguments. */
877 gdb_rl_operate_and_get_next (int count
, int key
)
881 /* Use the async hook. */
882 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
884 /* Find the current line, and find the next line to use. */
885 where
= where_history();
887 if ((history_is_stifled () && (history_length
>= history_max_entries
))
888 || (where
>= history_length
- 1))
889 operate_saved_history
= where
;
891 operate_saved_history
= where
+ 1;
893 return rl_newline (1, key
);
896 /* Number of user commands executed during this session. */
898 static int command_count
= 0;
900 /* Add the user command COMMAND to the input history list. */
903 gdb_add_history (const char *command
)
907 if (history_remove_duplicates
!= 0)
910 int lookbehind_threshold
;
912 /* The lookbehind threshold for finding a duplicate history entry is
913 bounded by command_count because we can't meaningfully delete
914 history entries that are already stored in the history file since
915 the history file is appended to. */
916 if (history_remove_duplicates
== -1
917 || history_remove_duplicates
> command_count
)
918 lookbehind_threshold
= command_count
;
920 lookbehind_threshold
= history_remove_duplicates
;
923 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
925 HIST_ENTRY
*temp
= previous_history ();
930 if (strcmp (temp
->line
, command
) == 0)
932 HIST_ENTRY
*prev
= remove_history (where_history ());
934 free_history_entry (prev
);
941 add_history (command
);
944 /* Safely append new history entries to the history file in a corruption-free
945 way using an intermediate local history file. */
948 gdb_safe_append_history (void)
950 int ret
, saved_errno
;
951 char *local_history_filename
;
952 struct cleanup
*old_chain
;
954 local_history_filename
955 = xstrprintf ("%s-gdb%d~", history_filename
, getpid ());
956 old_chain
= make_cleanup (xfree
, local_history_filename
);
958 ret
= rename (history_filename
, local_history_filename
);
960 if (ret
< 0 && saved_errno
!= ENOENT
)
962 warning (_("Could not rename %s to %s: %s"),
963 history_filename
, local_history_filename
,
964 safe_strerror (saved_errno
));
970 /* If the rename failed with ENOENT then either the global history
971 file never existed in the first place or another GDB process is
972 currently appending to it (and has thus temporarily renamed it).
973 Since we can't distinguish between these two cases, we have to
974 conservatively assume the first case and therefore must write out
975 (not append) our known history to our local history file and try
976 to move it back anyway. Otherwise a global history file would
977 never get created! */
978 gdb_assert (saved_errno
== ENOENT
);
979 write_history (local_history_filename
);
983 append_history (command_count
, local_history_filename
);
984 if (history_is_stifled ())
985 history_truncate_file (local_history_filename
, history_max_entries
);
988 ret
= rename (local_history_filename
, history_filename
);
990 if (ret
< 0 && saved_errno
!= EEXIST
)
991 warning (_("Could not rename %s to %s: %s"),
992 local_history_filename
, history_filename
,
993 safe_strerror (saved_errno
));
996 do_cleanups (old_chain
);
999 /* Read one line from the command input stream `instream' into a local
1000 static buffer. The buffer is made bigger as necessary. Returns
1001 the address of the start of the line.
1003 NULL is returned for end of file.
1005 *If* the instream == stdin & stdin is a terminal, the line read is
1006 copied into the global 'saved_command_line' so that it can be
1009 This routine either uses fancy command line editing or simple input
1010 as the user has requested. */
1013 command_line_input (const char *prompt_arg
, int repeat
, char *annotation_suffix
)
1015 static struct buffer cmd_line_buffer
;
1016 static int cmd_line_buffer_initialized
;
1017 const char *prompt
= prompt_arg
;
1020 /* The annotation suffix must be non-NULL. */
1021 if (annotation_suffix
== NULL
)
1022 annotation_suffix
= "";
1024 if (annotation_level
> 1 && instream
== stdin
)
1029 = (char *) alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1030 + strlen (annotation_suffix
) + 40);
1032 local_prompt
[0] = '\0';
1034 strcpy (local_prompt
, prompt
);
1035 strcat (local_prompt
, "\n\032\032");
1036 strcat (local_prompt
, annotation_suffix
);
1037 strcat (local_prompt
, "\n");
1039 prompt
= local_prompt
;
1042 if (!cmd_line_buffer_initialized
)
1044 buffer_init (&cmd_line_buffer
);
1045 cmd_line_buffer_initialized
= 1;
1048 /* Starting a new command line. */
1049 cmd_line_buffer
.used_size
= 0;
1051 /* Control-C quits instantly if typed while in this loop
1052 since it should not wait until the user types a newline. */
1057 signal (STOP_SIGNAL
, handle_stop_sig
);
1064 /* Make sure that all output has been output. Some machines may
1065 let you get away with leaving out some of the gdb_flush, but
1068 gdb_flush (gdb_stdout
);
1069 gdb_flush (gdb_stderr
);
1071 if (source_file_name
!= NULL
)
1072 ++source_line_number
;
1074 if (annotation_level
> 1 && instream
== stdin
)
1076 puts_unfiltered ("\n\032\032pre-");
1077 puts_unfiltered (annotation_suffix
);
1078 puts_unfiltered ("\n");
1081 /* Don't use fancy stuff if not talking to stdin. */
1082 if (deprecated_readline_hook
&& input_from_terminal_p ())
1084 rl
= (*deprecated_readline_hook
) (prompt
);
1086 else if (command_editing_p
&& input_from_terminal_p ())
1088 rl
= gdb_readline_wrapper (prompt
);
1092 rl
= gdb_readline_no_editing (prompt
);
1095 cmd
= handle_line_of_input (&cmd_line_buffer
, rl
,
1096 repeat
, annotation_suffix
);
1097 if (cmd
== (char *) EOF
)
1110 signal (STOP_SIGNAL
, SIG_DFL
);
1117 /* Print the GDB banner. */
1119 print_gdb_version (struct ui_file
*stream
)
1121 /* From GNU coding standards, first line is meant to be easy for a
1122 program to parse, and is just canonical program name and version
1123 number, which starts after last space. */
1125 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1127 /* Second line is a copyright notice. */
1129 fprintf_filtered (stream
,
1130 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1132 /* Following the copyright is a brief statement that the program is
1133 free software, that users are free to copy and change it on
1134 certain conditions, that it is covered by the GNU GPL, and that
1135 there is no warranty. */
1137 fprintf_filtered (stream
, "\
1138 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1139 \nThis is free software: you are free to change and redistribute it.\n\
1140 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1141 and \"show warranty\" for details.\n");
1143 /* After the required info we print the configuration information. */
1145 fprintf_filtered (stream
, "This GDB was configured as \"");
1146 if (strcmp (host_name
, target_name
) != 0)
1148 fprintf_filtered (stream
, "--host=%s --target=%s",
1149 host_name
, target_name
);
1153 fprintf_filtered (stream
, "%s", host_name
);
1155 fprintf_filtered (stream
, "\".\n\
1156 Type \"show configuration\" for configuration details.");
1158 if (REPORT_BUGS_TO
[0])
1160 fprintf_filtered (stream
,
1161 _("\nFor bug reporting instructions, please see:\n"));
1162 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1164 fprintf_filtered (stream
,
1165 _("Find the GDB manual and other documentation \
1166 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1167 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1168 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1169 commands related to \"word\"."));
1172 /* Print the details of GDB build-time configuration. */
1174 print_gdb_configuration (struct ui_file
*stream
)
1176 fprintf_filtered (stream
, _("\
1177 This GDB was configured as follows:\n\
1178 configure --host=%s --target=%s\n\
1179 "), host_name
, target_name
);
1180 fprintf_filtered (stream
, _("\
1181 --with-auto-load-dir=%s\n\
1182 --with-auto-load-safe-path=%s\n\
1183 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1185 fprintf_filtered (stream
, _("\
1189 fprintf_filtered (stream
, _("\
1194 fprintf_filtered (stream
, _("\
1195 --with-gdb-datadir=%s%s\n\
1196 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1198 fprintf_filtered (stream
, _("\
1199 --with-iconv-bin=%s%s\n\
1200 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1202 if (JIT_READER_DIR
[0])
1203 fprintf_filtered (stream
, _("\
1204 --with-jit-reader-dir=%s%s\n\
1205 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1206 #if HAVE_LIBUNWIND_IA64_H
1207 fprintf_filtered (stream
, _("\
1208 --with-libunwind-ia64\n\
1211 fprintf_filtered (stream
, _("\
1212 --without-libunwind-ia64\n\
1216 fprintf_filtered (stream
, _("\
1220 fprintf_filtered (stream
, _("\
1224 #ifdef WITH_PYTHON_PATH
1225 fprintf_filtered (stream
, _("\
1226 --with-python=%s%s\n\
1227 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1230 fprintf_filtered (stream
, _("\
1234 fprintf_filtered (stream
, _("\
1239 fprintf_filtered (stream
, _("\
1240 --with-relocated-sources=%s\n\
1244 fprintf_filtered (stream
, _("\
1245 --with-separate-debug-dir=%s%s\n\
1246 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1247 if (TARGET_SYSTEM_ROOT
[0])
1248 fprintf_filtered (stream
, _("\
1249 --with-sysroot=%s%s\n\
1250 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1251 if (SYSTEM_GDBINIT
[0])
1252 fprintf_filtered (stream
, _("\
1253 --with-system-gdbinit=%s%s\n\
1254 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1255 #if HAVE_LIBBABELTRACE
1256 fprintf_filtered (stream
, _("\
1257 --with-babeltrace\n\
1260 fprintf_filtered (stream
, _("\
1261 --without-babeltrace\n\
1264 /* We assume "relocatable" will be printed at least once, thus we always
1265 print this text. It's a reasonably safe assumption for now. */
1266 fprintf_filtered (stream
, _("\n\
1267 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1268 tree, and GDB will still find it.)\n\
1273 /* The current top level prompt, settable with "set prompt", and/or
1274 with the python `gdb.prompt_hook' hook. */
1275 static char *top_prompt
;
1277 /* Access method for the GDB prompt string. */
1285 /* Set method for the GDB prompt string. */
1288 set_prompt (const char *s
)
1290 char *p
= xstrdup (s
);
1303 /* Callback for iterate_over_inferiors. Kills or detaches the given
1304 inferior, depending on how we originally gained control of it. */
1307 kill_or_detach (struct inferior
*inf
, void *args
)
1309 struct qt_args
*qt
= (struct qt_args
*) args
;
1310 struct thread_info
*thread
;
1315 thread
= any_thread_of_process (inf
->pid
);
1318 switch_to_thread (thread
->ptid
);
1320 /* Leave core files alone. */
1321 if (target_has_execution
)
1323 if (inf
->attach_flag
)
1324 target_detach (qt
->args
, qt
->from_tty
);
1333 /* Callback for iterate_over_inferiors. Prints info about what GDB
1334 will do to each inferior on a "quit". ARG points to a struct
1335 ui_out where output is to be collected. */
1338 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1340 struct ui_file
*stb
= (struct ui_file
*) arg
;
1345 if (inf
->attach_flag
)
1346 fprintf_filtered (stb
,
1347 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1348 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1350 fprintf_filtered (stb
,
1351 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1352 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1357 /* If necessary, make the user confirm that we should quit. Return
1358 non-zero if we should quit, zero if we shouldn't. */
1363 struct ui_file
*stb
;
1364 struct cleanup
*old_chain
;
1368 /* Don't even ask if we're only debugging a core file inferior. */
1369 if (!have_live_inferiors ())
1372 /* Build the query string as a single string. */
1373 stb
= mem_fileopen ();
1374 old_chain
= make_cleanup_ui_file_delete (stb
);
1376 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1377 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1378 fprintf_filtered (stb
, _("\nQuit anyway? "));
1380 str
= ui_file_xstrdup (stb
, NULL
);
1381 make_cleanup (xfree
, str
);
1383 qr
= query ("%s", str
);
1384 do_cleanups (old_chain
);
1388 /* Prepare to exit GDB cleanly by undoing any changes made to the
1389 terminal so that we leave the terminal in the state we acquired it. */
1392 undo_terminal_modifications_before_exit (void)
1394 target_terminal_ours ();
1398 if (async_command_editing_p
)
1399 gdb_disable_readline ();
1403 /* Quit without asking for confirmation. */
1406 quit_force (char *args
, int from_tty
)
1411 undo_terminal_modifications_before_exit ();
1413 /* An optional expression may be used to cause gdb to terminate with the
1414 value of that expression. */
1417 struct value
*val
= parse_and_eval (args
);
1419 exit_code
= (int) value_as_long (val
);
1421 else if (return_child_result
)
1422 exit_code
= return_child_result_value
;
1425 qt
.from_tty
= from_tty
;
1427 /* We want to handle any quit errors and exit regardless. */
1429 /* Get out of tfind mode, and kill or detach all inferiors. */
1432 disconnect_tracing ();
1433 iterate_over_inferiors (kill_or_detach
, &qt
);
1435 CATCH (ex
, RETURN_MASK_ALL
)
1437 exception_print (gdb_stderr
, ex
);
1441 /* Give all pushed targets a chance to do minimal cleanup, and pop
1447 CATCH (ex
, RETURN_MASK_ALL
)
1449 exception_print (gdb_stderr
, ex
);
1453 /* Save the history information if it is appropriate to do so. */
1456 if (write_history_p
&& history_filename
1457 && input_from_terminal_p ())
1458 gdb_safe_append_history ();
1460 CATCH (ex
, RETURN_MASK_ALL
)
1462 exception_print (gdb_stderr
, ex
);
1466 /* Do any final cleanups before exiting. */
1469 do_final_cleanups (all_cleanups ());
1471 CATCH (ex
, RETURN_MASK_ALL
)
1473 exception_print (gdb_stderr
, ex
);
1480 /* Returns whether GDB is running on a terminal and input is
1481 currently coming from that terminal. */
1484 input_from_terminal_p (void)
1489 if (gdb_has_a_terminal () && instream
== stdin
)
1492 /* If INSTREAM is unset, and we are not in a user command, we
1493 must be in Insight. That's like having a terminal, for our
1495 if (instream
== NULL
&& !in_user_command
)
1502 dont_repeat_command (char *ignored
, int from_tty
)
1504 /* Can't call dont_repeat here because we're not necessarily reading
1506 *saved_command_line
= 0;
1509 /* Functions to manipulate command line editing control variables. */
1511 /* Number of commands to print in each call to show_commands. */
1512 #define Hist_print 10
1514 show_commands (char *args
, int from_tty
)
1516 /* Index for history commands. Relative to history_base. */
1519 /* Number of the history entry which we are planning to display next.
1520 Relative to history_base. */
1523 /* Print out some of the commands from the command history. */
1527 if (args
[0] == '+' && args
[1] == '\0')
1528 /* "info editing +" should print from the stored position. */
1531 /* "info editing <exp>" should print around command number <exp>. */
1532 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1534 /* "show commands" means print the last Hist_print commands. */
1537 num
= history_length
- Hist_print
;
1543 /* If there are at least Hist_print commands, we want to display the last
1544 Hist_print rather than, say, the last 6. */
1545 if (history_length
- num
< Hist_print
)
1547 num
= history_length
- Hist_print
;
1553 offset
< num
+ Hist_print
&& offset
< history_length
;
1556 printf_filtered ("%5d %s\n", history_base
+ offset
,
1557 (history_get (history_base
+ offset
))->line
);
1560 /* The next command we want to display is the next one that we haven't
1564 /* If the user repeats this command with return, it should do what
1565 "show commands +" does. This is unnecessary if arg is null,
1566 because "show commands +" is not useful after "show commands". */
1567 if (from_tty
&& args
)
1574 /* Update the size of our command history file to HISTORY_SIZE.
1576 A HISTORY_SIZE of -1 stands for unlimited. */
1579 set_readline_history_size (int history_size
)
1581 gdb_assert (history_size
>= -1);
1583 if (history_size
== -1)
1584 unstifle_history ();
1586 stifle_history (history_size
);
1589 /* Called by do_setshow_command. */
1591 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1593 set_readline_history_size (history_size_setshow_var
);
1597 set_history (char *args
, int from_tty
)
1599 printf_unfiltered (_("\"set history\" must be followed "
1600 "by the name of a history subcommand.\n"));
1601 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1605 show_history (char *args
, int from_tty
)
1607 cmd_show_list (showhistlist
, from_tty
, "");
1610 int info_verbose
= 0; /* Default verbose msgs off. */
1612 /* Called by do_setshow_command. An elaborate joke. */
1614 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1616 const char *cmdname
= "verbose";
1617 struct cmd_list_element
*showcmd
;
1619 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1620 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1624 c
->doc
= "Set verbose printing of informational messages.";
1625 showcmd
->doc
= "Show verbose printing of informational messages.";
1629 c
->doc
= "Set verbosity.";
1630 showcmd
->doc
= "Show verbosity.";
1634 /* Init the history buffer. Note that we are called after the init file(s)
1635 have been read so that the user can change the history file via his
1636 .gdbinit file (for instance). The GDBHISTFILE environment variable
1637 overrides all of this. */
1644 tmpenv
= getenv ("GDBHISTSIZE");
1651 tmpenv
= skip_spaces (tmpenv
);
1653 var
= strtol (tmpenv
, &endptr
, 10);
1654 saved_errno
= errno
;
1655 endptr
= skip_spaces (endptr
);
1657 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1658 empty string, a negative number or a huge positive number (larger than
1659 INT_MAX) then set the history size to unlimited. Otherwise set our
1660 history size to the number we have read. This behavior is consistent
1661 with how bash handles HISTSIZE. */
1662 if (*endptr
!= '\0')
1664 else if (*tmpenv
== '\0'
1667 /* On targets where INT_MAX == LONG_MAX, we have to look at
1668 errno after calling strtol to distinguish between a value that
1669 is exactly INT_MAX and an overflowing value that was clamped
1671 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1672 history_size_setshow_var
= -1;
1674 history_size_setshow_var
= var
;
1677 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1679 if (history_size_setshow_var
== -2)
1680 history_size_setshow_var
= 256;
1682 set_readline_history_size (history_size_setshow_var
);
1684 tmpenv
= getenv ("GDBHISTFILE");
1686 history_filename
= xstrdup (tmpenv
);
1687 else if (!history_filename
)
1689 /* We include the current directory so that if the user changes
1690 directories the file written will be the same as the one
1693 /* No leading dots in file names are allowed on MSDOS. */
1694 history_filename
= concat (current_directory
, "/_gdb_history",
1697 history_filename
= concat (current_directory
, "/.gdb_history",
1701 read_history (history_filename
);
1705 show_prompt (struct ui_file
*file
, int from_tty
,
1706 struct cmd_list_element
*c
, const char *value
)
1708 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1712 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1713 struct cmd_list_element
*c
, const char *value
)
1715 fprintf_filtered (file
, _("Editing of command lines as "
1716 "they are typed is %s.\n"),
1721 show_annotation_level (struct ui_file
*file
, int from_tty
,
1722 struct cmd_list_element
*c
, const char *value
)
1724 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1728 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1729 struct cmd_list_element
*c
, const char *value
)
1731 fprintf_filtered (file
, _("Notification of completion for "
1732 "asynchronous execution commands is %s.\n"),
1736 /* New values of the "data-directory" parameter are staged here. */
1737 static char *staged_gdb_datadir
;
1739 /* "set" command for the gdb_datadir configuration variable. */
1742 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1744 set_gdb_data_directory (staged_gdb_datadir
);
1745 observer_notify_gdb_datadir_changed ();
1748 /* "show" command for the gdb_datadir configuration variable. */
1751 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
1752 struct cmd_list_element
*c
, const char *value
)
1754 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
1759 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
1761 /* We include the current directory so that if the user changes
1762 directories the file written will be the same as the one
1764 if (!IS_ABSOLUTE_PATH (history_filename
))
1765 history_filename
= reconcat (history_filename
, current_directory
, "/",
1766 history_filename
, (char *) NULL
);
1772 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1773 the DEFAULT_PROMPT is. */
1774 set_prompt (DEFAULT_PROMPT
);
1776 /* Set the important stuff up for command editing. */
1777 command_editing_p
= 1;
1778 history_expansion_p
= 0;
1779 write_history_p
= 0;
1781 /* Setup important stuff for command line editing. */
1782 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1783 rl_completion_entry_function
= readline_line_completion_function
;
1784 rl_completer_word_break_characters
= default_word_break_characters ();
1785 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1786 rl_completion_display_matches_hook
= cli_display_match_list
;
1787 rl_readline_name
= "gdb";
1788 rl_terminal_name
= getenv ("TERM");
1790 /* The name for this defun comes from Bash, where it originated.
1791 15 is Control-o, the same binding this function has in Bash. */
1792 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1794 add_setshow_string_cmd ("prompt", class_support
,
1796 _("Set gdb's prompt"),
1797 _("Show gdb's prompt"),
1800 &setlist
, &showlist
);
1802 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1803 Don't repeat this command.\nPrimarily \
1804 used inside of user-defined commands that should not be repeated when\n\
1807 add_setshow_boolean_cmd ("editing", class_support
,
1808 &async_command_editing_p
, _("\
1809 Set editing of command lines as they are typed."), _("\
1810 Show editing of command lines as they are typed."), _("\
1811 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1812 Without an argument, command line editing is enabled. To edit, use\n\
1813 EMACS-like or VI-like commands like control-P or ESC."),
1814 set_async_editing_command
,
1815 show_async_command_editing_p
,
1816 &setlist
, &showlist
);
1818 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1819 Set saving of the history record on exit."), _("\
1820 Show saving of the history record on exit."), _("\
1821 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1822 Without an argument, saving is enabled."),
1824 show_write_history_p
,
1825 &sethistlist
, &showhistlist
);
1827 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
1828 &history_size_setshow_var
, _("\
1829 Set the size of the command history,"), _("\
1830 Show the size of the command history,"), _("\
1831 ie. the number of previous commands to keep a record of.\n\
1832 If set to \"unlimited\", the number of commands kept in the history\n\
1833 list is unlimited. This defaults to the value of the environment\n\
1834 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1835 set_history_size_command
,
1837 &sethistlist
, &showhistlist
);
1839 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
1840 &history_remove_duplicates
, _("\
1841 Set how far back in history to look for and remove duplicate entries."), _("\
1842 Show how far back in history to look for and remove duplicate entries."), _("\
1843 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1844 and remove the first history entry that is a duplicate of the most recent\n\
1845 entry, each time a new history entry is added.\n\
1846 If set to \"unlimited\", this lookbehind is unbounded.\n\
1847 Only history entries added during this session are considered for removal.\n\
1848 If set to 0, removal of duplicate history entries is disabled.\n\
1849 By default this option is set to 0."),
1851 show_history_remove_duplicates
,
1852 &sethistlist
, &showhistlist
);
1854 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1855 Set the filename in which to record the command history"), _("\
1856 Show the filename in which to record the command history"), _("\
1857 (the list of previous commands of which a record is kept)."),
1858 set_history_filename
,
1859 show_history_filename
,
1860 &sethistlist
, &showhistlist
);
1862 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
1863 Set whether to confirm potentially dangerous operations."), _("\
1864 Show whether to confirm potentially dangerous operations."), NULL
,
1867 &setlist
, &showlist
);
1869 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1870 Set annotation_level."), _("\
1871 Show annotation_level."), _("\
1872 0 == normal; 1 == fullname (for use when running under emacs)\n\
1873 2 == output annotated suitably for use by programs that control GDB."),
1875 show_annotation_level
,
1876 &setlist
, &showlist
);
1878 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1879 &exec_done_display_p
, _("\
1880 Set notification of completion for asynchronous execution commands."), _("\
1881 Show notification of completion for asynchronous execution commands."), _("\
1882 Use \"on\" to enable the notification, and \"off\" to disable it."),
1884 show_exec_done_display_p
,
1885 &setlist
, &showlist
);
1887 add_setshow_filename_cmd ("data-directory", class_maintenance
,
1888 &staged_gdb_datadir
, _("Set GDB's data directory."),
1889 _("Show GDB's data directory."),
1891 When set, GDB uses the specified path to search for data files."),
1892 set_gdb_datadir
, show_gdb_datadir
,
1898 gdb_init (char *argv0
)
1900 if (pre_init_ui_hook
)
1901 pre_init_ui_hook ();
1903 /* Run the init function of each source file. */
1906 /* Make sure we return to the original directory upon exit, come
1907 what may, since the OS doesn't do that for us. */
1908 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1911 init_cmd_lists (); /* This needs to be done first. */
1912 initialize_targets (); /* Setup target_terminal macros for utils.c. */
1913 initialize_utils (); /* Make errors and warnings possible. */
1917 /* Here is where we call all the _initialize_foo routines. */
1918 initialize_all_files ();
1920 /* This creates the current_program_space. Do this after all the
1921 _initialize_foo routines have had a chance to install their
1922 per-sspace data keys. Also do this before
1923 initialize_current_architecture is called, because it accesses
1924 exec_bfd of the current program space. */
1925 initialize_progspace ();
1926 initialize_inferiors ();
1927 initialize_current_architecture ();
1929 init_main (); /* But that omits this file! Do it now. */
1931 initialize_stdin_serial ();
1933 /* Take a snapshot of our tty state before readline/ncurses have had a chance
1935 set_initial_gdb_ttystate ();
1937 async_init_signals ();
1939 /* We need a default language for parsing expressions, so simple
1940 things like "set width 0" won't fail if no language is explicitly
1941 set in a config file or implicitly set by reading an executable
1943 set_language (language_c
);
1944 expected_language
= current_language
; /* Don't warn about the change. */
1946 /* Python initialization, for example, can require various commands to be
1947 installed. For example "info pretty-printer" needs the "info"
1948 prefix to be installed. Keep things simple and just do final
1949 script initialization here. */
1950 finish_ext_lang_initialization ();