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 struct cleanup
*old_chain
;
539 while (instream
&& !feof (instream
))
542 if (instream
== stdin
)
543 reinitialize_more_filter ();
544 old_chain
= make_cleanup (null_cleanup
, 0);
546 /* Get a command-line. This calls the readline package. */
547 command
= command_line_input (instream
== stdin
?
548 get_prompt () : (char *) NULL
,
549 instream
== stdin
, "prompt");
552 do_cleanups (old_chain
);
556 make_command_stats_cleanup (1);
558 /* Do not execute commented lines. */
559 if (command
[0] != '#')
561 execute_command (command
, instream
== stdin
);
563 /* Do any commands attached to breakpoint we are stopped at. */
564 bpstat_do_actions ();
566 do_cleanups (old_chain
);
570 /* When nonzero, cause dont_repeat to do nothing. This should only be
571 set via prevent_dont_repeat. */
573 static int suppress_dont_repeat
= 0;
575 /* Commands call this if they do not want to be repeated by null lines. */
580 if (suppress_dont_repeat
|| server_command
)
583 /* If we aren't reading from standard input, we are saving the last
584 thing read from stdin in line and don't want to delete it. Null
585 lines won't repeat here in any case. */
586 if (instream
== stdin
)
587 *saved_command_line
= 0;
590 /* Prevent dont_repeat from working, and return a cleanup that
591 restores the previous state. */
594 prevent_dont_repeat (void)
596 struct cleanup
*result
= make_cleanup_restore_integer (&suppress_dont_repeat
);
598 suppress_dont_repeat
= 1;
603 /* Read a line from the stream "instream" without command line editing.
605 It prints PROMPT once at the start.
606 Action is compatible with "readline", e.g. space for the result is
607 malloc'd and should be freed by the caller.
609 A NULL return means end of file. */
612 gdb_readline_no_editing (const char *prompt
)
614 struct buffer line_buffer
;
616 buffer_init (&line_buffer
);
620 /* Don't use a _filtered function here. It causes the assumed
621 character position to be off, since the newline we read from
622 the user is not accounted for. */
623 fputs_unfiltered (prompt
, gdb_stdout
);
624 gdb_flush (gdb_stdout
);
631 /* Read from stdin if we are executing a user defined command.
632 This is the right thing for prompt_for_continue, at least. */
633 c
= fgetc (instream
? instream
: stdin
);
637 if (line_buffer
.used_size
> 0)
638 /* The last line does not end with a newline. Return it, and
639 if we are called again fgetc will still return EOF and
640 we'll return NULL then. */
642 xfree (buffer_finish (&line_buffer
));
648 if (line_buffer
.used_size
> 0
649 && line_buffer
.buffer
[line_buffer
.used_size
- 1] == '\r')
650 line_buffer
.used_size
--;
654 buffer_grow_char (&line_buffer
, c
);
657 buffer_grow_char (&line_buffer
, '\0');
658 return buffer_finish (&line_buffer
);
661 /* Variables which control command line editing and history
662 substitution. These variables are given default values at the end
664 static int command_editing_p
;
666 /* NOTE 1999-04-29: This variable will be static again, once we modify
667 gdb to use the event loop as the default command loop and we merge
668 event-top.c into this file, top.c. */
670 /* static */ int history_expansion_p
;
672 static int write_history_p
;
674 show_write_history_p (struct ui_file
*file
, int from_tty
,
675 struct cmd_list_element
*c
, const char *value
)
677 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
681 /* The variable associated with the "set/show history size"
682 command. The value -1 means unlimited, and -2 means undefined. */
683 static int history_size_setshow_var
= -2;
686 show_history_size (struct ui_file
*file
, int from_tty
,
687 struct cmd_list_element
*c
, const char *value
)
689 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
693 /* Variable associated with the "history remove-duplicates" option.
694 The value -1 means unlimited. */
695 static int history_remove_duplicates
= 0;
698 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
699 struct cmd_list_element
*c
, const char *value
)
701 fprintf_filtered (file
,
702 _("The number of history entries to look back at for "
703 "duplicates is %s.\n"),
707 static char *history_filename
;
709 show_history_filename (struct ui_file
*file
, int from_tty
,
710 struct cmd_list_element
*c
, const char *value
)
712 fprintf_filtered (file
, _("The filename in which to record "
713 "the command history is \"%s\".\n"),
717 /* This is like readline(), but it has some gdb-specific behavior.
718 gdb may want readline in both the synchronous and async modes during
719 a single gdb invocation. At the ordinary top-level prompt we might
720 be using the async readline. That means we can't use
721 rl_pre_input_hook, since it doesn't work properly in async mode.
722 However, for a secondary prompt (" >", such as occurs during a
723 `define'), gdb wants a synchronous response.
725 We used to call readline() directly, running it in synchronous
726 mode. But mixing modes this way is not supported, and as of
727 readline 5.x it no longer works; the arrow keys come unbound during
728 the synchronous call. So we make a nested call into the event
729 loop. That's what gdb_readline_wrapper is for. */
731 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
732 rely on gdb_readline_wrapper_result, which might still be NULL if
733 the user types Control-D for EOF. */
734 static int gdb_readline_wrapper_done
;
736 /* The result of the current call to gdb_readline_wrapper, once a newline
738 static char *gdb_readline_wrapper_result
;
740 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
741 to be called after the newline is processed (which will redisplay
742 the prompt). But in gdb_readline_wrapper we will not get a new
743 prompt until the next call, or until we return to the event loop.
744 So we disable this hook around the newline and restore it before we
746 static void (*saved_after_char_processing_hook
) (void);
749 /* The number of nested readline secondary prompts that are currently
752 static int gdb_secondary_prompt_depth
= 0;
757 gdb_in_secondary_prompt_p (void)
759 return gdb_secondary_prompt_depth
> 0;
763 /* This function is called when readline has seen a complete line of
767 gdb_readline_wrapper_line (char *line
)
769 gdb_assert (!gdb_readline_wrapper_done
);
770 gdb_readline_wrapper_result
= line
;
771 gdb_readline_wrapper_done
= 1;
773 /* Prevent operate-and-get-next from acting too early. */
774 saved_after_char_processing_hook
= after_char_processing_hook
;
775 after_char_processing_hook
= NULL
;
777 /* Prevent parts of the prompt from being redisplayed if annotations
778 are enabled, and readline's state getting out of sync. We'll
779 reinstall the callback handler, which puts the terminal in raw
780 mode (or in readline lingo, in prepped state), when we're next
781 ready to process user input, either in display_gdb_prompt, or if
782 we're handling an asynchronous target event and running in the
783 background, just before returning to the event loop to process
784 further input (or more target events). */
785 if (async_command_editing_p
)
786 gdb_rl_callback_handler_remove ();
789 struct gdb_readline_wrapper_cleanup
791 void (*handler_orig
) (char *);
792 int already_prompted_orig
;
794 /* Whether the target was async. */
795 int target_is_async_orig
;
799 gdb_readline_wrapper_cleanup (void *arg
)
801 struct gdb_readline_wrapper_cleanup
*cleanup
802 = (struct gdb_readline_wrapper_cleanup
*) arg
;
804 rl_already_prompted
= cleanup
->already_prompted_orig
;
806 gdb_assert (input_handler
== gdb_readline_wrapper_line
);
807 input_handler
= cleanup
->handler_orig
;
809 /* Don't restore our input handler in readline yet. That would make
810 readline prep the terminal (putting it in raw mode), while the
811 line we just read may trigger execution of a command that expects
812 the terminal in the default cooked/canonical mode, such as e.g.,
813 running Python's interactive online help utility. See
814 gdb_readline_wrapper_line for when we'll reinstall it. */
816 gdb_readline_wrapper_result
= NULL
;
817 gdb_readline_wrapper_done
= 0;
818 gdb_secondary_prompt_depth
--;
819 gdb_assert (gdb_secondary_prompt_depth
>= 0);
821 after_char_processing_hook
= saved_after_char_processing_hook
;
822 saved_after_char_processing_hook
= NULL
;
824 if (cleanup
->target_is_async_orig
)
831 gdb_readline_wrapper (const char *prompt
)
833 struct cleanup
*back_to
;
834 struct gdb_readline_wrapper_cleanup
*cleanup
;
837 cleanup
= XNEW (struct gdb_readline_wrapper_cleanup
);
838 cleanup
->handler_orig
= input_handler
;
839 input_handler
= gdb_readline_wrapper_line
;
841 cleanup
->already_prompted_orig
= rl_already_prompted
;
843 cleanup
->target_is_async_orig
= target_is_async_p ();
845 gdb_secondary_prompt_depth
++;
846 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
848 if (cleanup
->target_is_async_orig
)
851 /* Display our prompt and prevent double prompt display. */
852 display_gdb_prompt (prompt
);
853 rl_already_prompted
= 1;
855 if (after_char_processing_hook
)
856 (*after_char_processing_hook
) ();
857 gdb_assert (after_char_processing_hook
== NULL
);
859 while (gdb_do_one_event () >= 0)
860 if (gdb_readline_wrapper_done
)
863 retval
= gdb_readline_wrapper_result
;
864 do_cleanups (back_to
);
869 /* The current saved history number from operate-and-get-next.
870 This is -1 if not valid. */
871 static int operate_saved_history
= -1;
873 /* This is put on the appropriate hook and helps operate-and-get-next
876 gdb_rl_operate_and_get_next_completion (void)
878 int delta
= where_history () - operate_saved_history
;
880 /* The `key' argument to rl_get_previous_history is ignored. */
881 rl_get_previous_history (delta
, 0);
882 operate_saved_history
= -1;
884 /* readline doesn't automatically update the display for us. */
887 after_char_processing_hook
= NULL
;
888 rl_pre_input_hook
= NULL
;
891 /* This is a gdb-local readline command handler. It accepts the
892 current command line (like RET does) and, if this command was taken
893 from the history, arranges for the next command in the history to
894 appear on the command line when the prompt returns.
895 We ignore the arguments. */
897 gdb_rl_operate_and_get_next (int count
, int key
)
901 /* Use the async hook. */
902 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
904 /* Find the current line, and find the next line to use. */
905 where
= where_history();
907 if ((history_is_stifled () && (history_length
>= history_max_entries
))
908 || (where
>= history_length
- 1))
909 operate_saved_history
= where
;
911 operate_saved_history
= where
+ 1;
913 return rl_newline (1, key
);
916 /* Number of user commands executed during this session. */
918 static int command_count
= 0;
920 /* Add the user command COMMAND to the input history list. */
923 gdb_add_history (const char *command
)
927 if (history_remove_duplicates
!= 0)
930 int lookbehind_threshold
;
932 /* The lookbehind threshold for finding a duplicate history entry is
933 bounded by command_count because we can't meaningfully delete
934 history entries that are already stored in the history file since
935 the history file is appended to. */
936 if (history_remove_duplicates
== -1
937 || history_remove_duplicates
> command_count
)
938 lookbehind_threshold
= command_count
;
940 lookbehind_threshold
= history_remove_duplicates
;
943 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
945 HIST_ENTRY
*temp
= previous_history ();
950 if (strcmp (temp
->line
, command
) == 0)
952 HIST_ENTRY
*prev
= remove_history (where_history ());
954 free_history_entry (prev
);
961 add_history (command
);
964 /* Safely append new history entries to the history file in a corruption-free
965 way using an intermediate local history file. */
968 gdb_safe_append_history (void)
970 int ret
, saved_errno
;
971 char *local_history_filename
;
972 struct cleanup
*old_chain
;
974 local_history_filename
975 = xstrprintf ("%s-gdb%d~", history_filename
, getpid ());
976 old_chain
= make_cleanup (xfree
, local_history_filename
);
978 ret
= rename (history_filename
, local_history_filename
);
980 if (ret
< 0 && saved_errno
!= ENOENT
)
982 warning (_("Could not rename %s to %s: %s"),
983 history_filename
, local_history_filename
,
984 safe_strerror (saved_errno
));
990 /* If the rename failed with ENOENT then either the global history
991 file never existed in the first place or another GDB process is
992 currently appending to it (and has thus temporarily renamed it).
993 Since we can't distinguish between these two cases, we have to
994 conservatively assume the first case and therefore must write out
995 (not append) our known history to our local history file and try
996 to move it back anyway. Otherwise a global history file would
997 never get created! */
998 gdb_assert (saved_errno
== ENOENT
);
999 write_history (local_history_filename
);
1003 append_history (command_count
, local_history_filename
);
1004 if (history_is_stifled ())
1005 history_truncate_file (local_history_filename
, history_max_entries
);
1008 ret
= rename (local_history_filename
, history_filename
);
1009 saved_errno
= errno
;
1010 if (ret
< 0 && saved_errno
!= EEXIST
)
1011 warning (_("Could not rename %s to %s: %s"),
1012 local_history_filename
, history_filename
,
1013 safe_strerror (saved_errno
));
1016 do_cleanups (old_chain
);
1019 /* Read one line from the command input stream `instream'
1020 into the local static buffer `linebuffer' (whose current length
1022 The buffer is made bigger as necessary.
1023 Returns the address of the start of the line.
1025 NULL is returned for end of file.
1027 *If* the instream == stdin & stdin is a terminal, the line read
1028 is copied into the file line saver (global var char *line,
1029 length linesize) so that it can be duplicated.
1031 This routine either uses fancy command line editing or
1032 simple input as the user has requested. */
1035 command_line_input (const char *prompt_arg
, int repeat
, char *annotation_suffix
)
1037 static char *linebuffer
= 0;
1038 static unsigned linelength
= 0;
1039 const char *prompt
= prompt_arg
;
1046 /* The annotation suffix must be non-NULL. */
1047 if (annotation_suffix
== NULL
)
1048 annotation_suffix
= "";
1050 if (annotation_level
> 1 && instream
== stdin
)
1055 = (char *) alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1056 + strlen (annotation_suffix
) + 40);
1058 local_prompt
[0] = '\0';
1060 strcpy (local_prompt
, prompt
);
1061 strcat (local_prompt
, "\n\032\032");
1062 strcat (local_prompt
, annotation_suffix
);
1063 strcat (local_prompt
, "\n");
1065 prompt
= local_prompt
;
1068 if (linebuffer
== 0)
1071 linebuffer
= (char *) xmalloc (linelength
);
1076 /* Control-C quits instantly if typed while in this loop
1077 since it should not wait until the user types a newline. */
1082 signal (STOP_SIGNAL
, handle_stop_sig
);
1087 /* Make sure that all output has been output. Some machines may
1088 let you get away with leaving out some of the gdb_flush, but
1091 gdb_flush (gdb_stdout
);
1092 gdb_flush (gdb_stderr
);
1094 if (source_file_name
!= NULL
)
1095 ++source_line_number
;
1097 if (annotation_level
> 1 && instream
== stdin
)
1099 puts_unfiltered ("\n\032\032pre-");
1100 puts_unfiltered (annotation_suffix
);
1101 puts_unfiltered ("\n");
1104 /* Don't use fancy stuff if not talking to stdin. */
1105 if (deprecated_readline_hook
&& input_from_terminal_p ())
1107 rl
= (*deprecated_readline_hook
) (prompt
);
1109 else if (command_editing_p
&& input_from_terminal_p ())
1111 rl
= gdb_readline_wrapper (prompt
);
1115 rl
= gdb_readline_no_editing (prompt
);
1118 if (annotation_level
> 1 && instream
== stdin
)
1120 puts_unfiltered ("\n\032\032post-");
1121 puts_unfiltered (annotation_suffix
);
1122 puts_unfiltered ("\n");
1125 if (!rl
|| rl
== (char *) EOF
)
1130 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
1132 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
1133 nline
= (char *) xrealloc (linebuffer
, linelength
);
1134 p
+= nline
- linebuffer
;
1138 /* Copy line. Don't copy null at end. (Leaves line alone
1139 if this was just a newline). */
1143 xfree (rl
); /* Allocated in readline. */
1145 if (p
== linebuffer
|| *(p
- 1) != '\\')
1148 p
--; /* Put on top of '\'. */
1154 signal (STOP_SIGNAL
, SIG_DFL
);
1161 #define SERVER_COMMAND_LENGTH 7
1163 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1164 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
1167 /* Note that we don't set `line'. Between this and the check in
1168 dont_repeat, this insures that repeating will still do the
1171 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1174 /* Do history expansion if that is wished. */
1175 if (history_expansion_p
&& instream
== stdin
1176 && ISATTY (instream
))
1178 char *history_value
;
1181 *p
= '\0'; /* Insert null now. */
1182 expanded
= history_expand (linebuffer
, &history_value
);
1185 /* Print the changes. */
1186 printf_unfiltered ("%s\n", history_value
);
1188 /* If there was an error, call this function again. */
1191 xfree (history_value
);
1192 return command_line_input (prompt
, repeat
,
1195 if (strlen (history_value
) > linelength
)
1197 linelength
= strlen (history_value
) + 1;
1198 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1200 strcpy (linebuffer
, history_value
);
1201 p
= linebuffer
+ strlen (linebuffer
);
1203 xfree (history_value
);
1206 /* If we just got an empty line, and that is supposed to repeat the
1207 previous command, return the value in the global buffer. */
1208 if (repeat
&& p
== linebuffer
)
1209 return saved_command_line
;
1210 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1212 return saved_command_line
;
1216 /* Add line to history if appropriate. */
1217 if (*linebuffer
&& input_from_terminal_p ())
1218 gdb_add_history (linebuffer
);
1220 /* Save into global buffer if appropriate. */
1223 xfree (saved_command_line
);
1224 saved_command_line
= xstrdup (linebuffer
);
1225 return saved_command_line
;
1231 /* Print the GDB banner. */
1233 print_gdb_version (struct ui_file
*stream
)
1235 /* From GNU coding standards, first line is meant to be easy for a
1236 program to parse, and is just canonical program name and version
1237 number, which starts after last space. */
1239 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1241 /* Second line is a copyright notice. */
1243 fprintf_filtered (stream
,
1244 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1246 /* Following the copyright is a brief statement that the program is
1247 free software, that users are free to copy and change it on
1248 certain conditions, that it is covered by the GNU GPL, and that
1249 there is no warranty. */
1251 fprintf_filtered (stream
, "\
1252 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1253 \nThis is free software: you are free to change and redistribute it.\n\
1254 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1255 and \"show warranty\" for details.\n");
1257 /* After the required info we print the configuration information. */
1259 fprintf_filtered (stream
, "This GDB was configured as \"");
1260 if (strcmp (host_name
, target_name
) != 0)
1262 fprintf_filtered (stream
, "--host=%s --target=%s",
1263 host_name
, target_name
);
1267 fprintf_filtered (stream
, "%s", host_name
);
1269 fprintf_filtered (stream
, "\".\n\
1270 Type \"show configuration\" for configuration details.");
1272 if (REPORT_BUGS_TO
[0])
1274 fprintf_filtered (stream
,
1275 _("\nFor bug reporting instructions, please see:\n"));
1276 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1278 fprintf_filtered (stream
,
1279 _("Find the GDB manual and other documentation \
1280 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1281 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1282 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1283 commands related to \"word\"."));
1286 /* Print the details of GDB build-time configuration. */
1288 print_gdb_configuration (struct ui_file
*stream
)
1290 fprintf_filtered (stream
, _("\
1291 This GDB was configured as follows:\n\
1292 configure --host=%s --target=%s\n\
1293 "), host_name
, target_name
);
1294 fprintf_filtered (stream
, _("\
1295 --with-auto-load-dir=%s\n\
1296 --with-auto-load-safe-path=%s\n\
1297 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1299 fprintf_filtered (stream
, _("\
1303 fprintf_filtered (stream
, _("\
1308 fprintf_filtered (stream
, _("\
1309 --with-gdb-datadir=%s%s\n\
1310 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1312 fprintf_filtered (stream
, _("\
1313 --with-iconv-bin=%s%s\n\
1314 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1316 if (JIT_READER_DIR
[0])
1317 fprintf_filtered (stream
, _("\
1318 --with-jit-reader-dir=%s%s\n\
1319 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1320 #if HAVE_LIBUNWIND_IA64_H
1321 fprintf_filtered (stream
, _("\
1322 --with-libunwind-ia64\n\
1325 fprintf_filtered (stream
, _("\
1326 --without-libunwind-ia64\n\
1330 fprintf_filtered (stream
, _("\
1334 fprintf_filtered (stream
, _("\
1338 #ifdef WITH_PYTHON_PATH
1339 fprintf_filtered (stream
, _("\
1340 --with-python=%s%s\n\
1341 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1344 fprintf_filtered (stream
, _("\
1348 fprintf_filtered (stream
, _("\
1353 fprintf_filtered (stream
, _("\
1354 --with-relocated-sources=%s\n\
1358 fprintf_filtered (stream
, _("\
1359 --with-separate-debug-dir=%s%s\n\
1360 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1361 if (TARGET_SYSTEM_ROOT
[0])
1362 fprintf_filtered (stream
, _("\
1363 --with-sysroot=%s%s\n\
1364 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1365 if (SYSTEM_GDBINIT
[0])
1366 fprintf_filtered (stream
, _("\
1367 --with-system-gdbinit=%s%s\n\
1368 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1369 #if HAVE_LIBBABELTRACE
1370 fprintf_filtered (stream
, _("\
1371 --with-babeltrace\n\
1374 fprintf_filtered (stream
, _("\
1375 --without-babeltrace\n\
1378 /* We assume "relocatable" will be printed at least once, thus we always
1379 print this text. It's a reasonably safe assumption for now. */
1380 fprintf_filtered (stream
, _("\n\
1381 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1382 tree, and GDB will still find it.)\n\
1387 /* The current top level prompt, settable with "set prompt", and/or
1388 with the python `gdb.prompt_hook' hook. */
1389 static char *top_prompt
;
1391 /* Access method for the GDB prompt string. */
1399 /* Set method for the GDB prompt string. */
1402 set_prompt (const char *s
)
1404 char *p
= xstrdup (s
);
1417 /* Callback for iterate_over_inferiors. Kills or detaches the given
1418 inferior, depending on how we originally gained control of it. */
1421 kill_or_detach (struct inferior
*inf
, void *args
)
1423 struct qt_args
*qt
= (struct qt_args
*) args
;
1424 struct thread_info
*thread
;
1429 thread
= any_thread_of_process (inf
->pid
);
1432 switch_to_thread (thread
->ptid
);
1434 /* Leave core files alone. */
1435 if (target_has_execution
)
1437 if (inf
->attach_flag
)
1438 target_detach (qt
->args
, qt
->from_tty
);
1447 /* Callback for iterate_over_inferiors. Prints info about what GDB
1448 will do to each inferior on a "quit". ARG points to a struct
1449 ui_out where output is to be collected. */
1452 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1454 struct ui_file
*stb
= (struct ui_file
*) arg
;
1459 if (inf
->attach_flag
)
1460 fprintf_filtered (stb
,
1461 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1462 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1464 fprintf_filtered (stb
,
1465 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1466 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1471 /* If necessary, make the user confirm that we should quit. Return
1472 non-zero if we should quit, zero if we shouldn't. */
1477 struct ui_file
*stb
;
1478 struct cleanup
*old_chain
;
1482 /* Don't even ask if we're only debugging a core file inferior. */
1483 if (!have_live_inferiors ())
1486 /* Build the query string as a single string. */
1487 stb
= mem_fileopen ();
1488 old_chain
= make_cleanup_ui_file_delete (stb
);
1490 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1491 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1492 fprintf_filtered (stb
, _("\nQuit anyway? "));
1494 str
= ui_file_xstrdup (stb
, NULL
);
1495 make_cleanup (xfree
, str
);
1497 qr
= query ("%s", str
);
1498 do_cleanups (old_chain
);
1502 /* Prepare to exit GDB cleanly by undoing any changes made to the
1503 terminal so that we leave the terminal in the state we acquired it. */
1506 undo_terminal_modifications_before_exit (void)
1508 target_terminal_ours ();
1512 if (async_command_editing_p
)
1513 gdb_disable_readline ();
1517 /* Quit without asking for confirmation. */
1520 quit_force (char *args
, int from_tty
)
1525 undo_terminal_modifications_before_exit ();
1527 /* An optional expression may be used to cause gdb to terminate with the
1528 value of that expression. */
1531 struct value
*val
= parse_and_eval (args
);
1533 exit_code
= (int) value_as_long (val
);
1535 else if (return_child_result
)
1536 exit_code
= return_child_result_value
;
1539 qt
.from_tty
= from_tty
;
1541 /* We want to handle any quit errors and exit regardless. */
1543 /* Get out of tfind mode, and kill or detach all inferiors. */
1546 disconnect_tracing ();
1547 iterate_over_inferiors (kill_or_detach
, &qt
);
1549 CATCH (ex
, RETURN_MASK_ALL
)
1551 exception_print (gdb_stderr
, ex
);
1555 /* Give all pushed targets a chance to do minimal cleanup, and pop
1561 CATCH (ex
, RETURN_MASK_ALL
)
1563 exception_print (gdb_stderr
, ex
);
1567 /* Save the history information if it is appropriate to do so. */
1570 if (write_history_p
&& history_filename
1571 && input_from_terminal_p ())
1572 gdb_safe_append_history ();
1574 CATCH (ex
, RETURN_MASK_ALL
)
1576 exception_print (gdb_stderr
, ex
);
1580 /* Do any final cleanups before exiting. */
1583 do_final_cleanups (all_cleanups ());
1585 CATCH (ex
, RETURN_MASK_ALL
)
1587 exception_print (gdb_stderr
, ex
);
1594 /* Returns whether GDB is running on a terminal and input is
1595 currently coming from that terminal. */
1598 input_from_terminal_p (void)
1603 if (gdb_has_a_terminal () && instream
== stdin
)
1606 /* If INSTREAM is unset, and we are not in a user command, we
1607 must be in Insight. That's like having a terminal, for our
1609 if (instream
== NULL
&& !in_user_command
)
1616 dont_repeat_command (char *ignored
, int from_tty
)
1618 /* Can't call dont_repeat here because we're not necessarily reading
1620 *saved_command_line
= 0;
1623 /* Functions to manipulate command line editing control variables. */
1625 /* Number of commands to print in each call to show_commands. */
1626 #define Hist_print 10
1628 show_commands (char *args
, int from_tty
)
1630 /* Index for history commands. Relative to history_base. */
1633 /* Number of the history entry which we are planning to display next.
1634 Relative to history_base. */
1637 /* Print out some of the commands from the command history. */
1641 if (args
[0] == '+' && args
[1] == '\0')
1642 /* "info editing +" should print from the stored position. */
1645 /* "info editing <exp>" should print around command number <exp>. */
1646 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1648 /* "show commands" means print the last Hist_print commands. */
1651 num
= history_length
- Hist_print
;
1657 /* If there are at least Hist_print commands, we want to display the last
1658 Hist_print rather than, say, the last 6. */
1659 if (history_length
- num
< Hist_print
)
1661 num
= history_length
- Hist_print
;
1667 offset
< num
+ Hist_print
&& offset
< history_length
;
1670 printf_filtered ("%5d %s\n", history_base
+ offset
,
1671 (history_get (history_base
+ offset
))->line
);
1674 /* The next command we want to display is the next one that we haven't
1678 /* If the user repeats this command with return, it should do what
1679 "show commands +" does. This is unnecessary if arg is null,
1680 because "show commands +" is not useful after "show commands". */
1681 if (from_tty
&& args
)
1688 /* Update the size of our command history file to HISTORY_SIZE.
1690 A HISTORY_SIZE of -1 stands for unlimited. */
1693 set_readline_history_size (int history_size
)
1695 gdb_assert (history_size
>= -1);
1697 if (history_size
== -1)
1698 unstifle_history ();
1700 stifle_history (history_size
);
1703 /* Called by do_setshow_command. */
1705 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1707 set_readline_history_size (history_size_setshow_var
);
1711 set_history (char *args
, int from_tty
)
1713 printf_unfiltered (_("\"set history\" must be followed "
1714 "by the name of a history subcommand.\n"));
1715 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1719 show_history (char *args
, int from_tty
)
1721 cmd_show_list (showhistlist
, from_tty
, "");
1724 int info_verbose
= 0; /* Default verbose msgs off. */
1726 /* Called by do_setshow_command. An elaborate joke. */
1728 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1730 const char *cmdname
= "verbose";
1731 struct cmd_list_element
*showcmd
;
1733 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1734 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1738 c
->doc
= "Set verbose printing of informational messages.";
1739 showcmd
->doc
= "Show verbose printing of informational messages.";
1743 c
->doc
= "Set verbosity.";
1744 showcmd
->doc
= "Show verbosity.";
1748 /* Init the history buffer. Note that we are called after the init file(s)
1749 have been read so that the user can change the history file via his
1750 .gdbinit file (for instance). The GDBHISTFILE environment variable
1751 overrides all of this. */
1758 tmpenv
= getenv ("GDBHISTSIZE");
1765 tmpenv
= skip_spaces (tmpenv
);
1767 var
= strtol (tmpenv
, &endptr
, 10);
1768 saved_errno
= errno
;
1769 endptr
= skip_spaces (endptr
);
1771 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1772 empty string, a negative number or a huge positive number (larger than
1773 INT_MAX) then set the history size to unlimited. Otherwise set our
1774 history size to the number we have read. This behavior is consistent
1775 with how bash handles HISTSIZE. */
1776 if (*endptr
!= '\0')
1778 else if (*tmpenv
== '\0'
1781 /* On targets where INT_MAX == LONG_MAX, we have to look at
1782 errno after calling strtol to distinguish between a value that
1783 is exactly INT_MAX and an overflowing value that was clamped
1785 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1786 history_size_setshow_var
= -1;
1788 history_size_setshow_var
= var
;
1791 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1793 if (history_size_setshow_var
== -2)
1794 history_size_setshow_var
= 256;
1796 set_readline_history_size (history_size_setshow_var
);
1798 tmpenv
= getenv ("GDBHISTFILE");
1800 history_filename
= xstrdup (tmpenv
);
1801 else if (!history_filename
)
1803 /* We include the current directory so that if the user changes
1804 directories the file written will be the same as the one
1807 /* No leading dots in file names are allowed on MSDOS. */
1808 history_filename
= concat (current_directory
, "/_gdb_history",
1811 history_filename
= concat (current_directory
, "/.gdb_history",
1815 read_history (history_filename
);
1819 show_prompt (struct ui_file
*file
, int from_tty
,
1820 struct cmd_list_element
*c
, const char *value
)
1822 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1826 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1827 struct cmd_list_element
*c
, const char *value
)
1829 fprintf_filtered (file
, _("Editing of command lines as "
1830 "they are typed is %s.\n"),
1835 show_annotation_level (struct ui_file
*file
, int from_tty
,
1836 struct cmd_list_element
*c
, const char *value
)
1838 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1842 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1843 struct cmd_list_element
*c
, const char *value
)
1845 fprintf_filtered (file
, _("Notification of completion for "
1846 "asynchronous execution commands is %s.\n"),
1850 /* New values of the "data-directory" parameter are staged here. */
1851 static char *staged_gdb_datadir
;
1853 /* "set" command for the gdb_datadir configuration variable. */
1856 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1858 set_gdb_data_directory (staged_gdb_datadir
);
1859 observer_notify_gdb_datadir_changed ();
1862 /* "show" command for the gdb_datadir configuration variable. */
1865 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
1866 struct cmd_list_element
*c
, const char *value
)
1868 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
1873 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
1875 /* We include the current directory so that if the user changes
1876 directories the file written will be the same as the one
1878 if (!IS_ABSOLUTE_PATH (history_filename
))
1879 history_filename
= reconcat (history_filename
, current_directory
, "/",
1880 history_filename
, (char *) NULL
);
1886 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1887 the DEFAULT_PROMPT is. */
1888 set_prompt (DEFAULT_PROMPT
);
1890 /* Set the important stuff up for command editing. */
1891 command_editing_p
= 1;
1892 history_expansion_p
= 0;
1893 write_history_p
= 0;
1895 /* Setup important stuff for command line editing. */
1896 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
1897 rl_completion_entry_function
= readline_line_completion_function
;
1898 rl_completer_word_break_characters
= default_word_break_characters ();
1899 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1900 rl_completion_display_matches_hook
= cli_display_match_list
;
1901 rl_readline_name
= "gdb";
1902 rl_terminal_name
= getenv ("TERM");
1904 /* The name for this defun comes from Bash, where it originated.
1905 15 is Control-o, the same binding this function has in Bash. */
1906 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1908 add_setshow_string_cmd ("prompt", class_support
,
1910 _("Set gdb's prompt"),
1911 _("Show gdb's prompt"),
1914 &setlist
, &showlist
);
1916 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1917 Don't repeat this command.\nPrimarily \
1918 used inside of user-defined commands that should not be repeated when\n\
1921 add_setshow_boolean_cmd ("editing", class_support
,
1922 &async_command_editing_p
, _("\
1923 Set editing of command lines as they are typed."), _("\
1924 Show editing of command lines as they are typed."), _("\
1925 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1926 Without an argument, command line editing is enabled. To edit, use\n\
1927 EMACS-like or VI-like commands like control-P or ESC."),
1928 set_async_editing_command
,
1929 show_async_command_editing_p
,
1930 &setlist
, &showlist
);
1932 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1933 Set saving of the history record on exit."), _("\
1934 Show saving of the history record on exit."), _("\
1935 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1936 Without an argument, saving is enabled."),
1938 show_write_history_p
,
1939 &sethistlist
, &showhistlist
);
1941 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
1942 &history_size_setshow_var
, _("\
1943 Set the size of the command history,"), _("\
1944 Show the size of the command history,"), _("\
1945 ie. the number of previous commands to keep a record of.\n\
1946 If set to \"unlimited\", the number of commands kept in the history\n\
1947 list is unlimited. This defaults to the value of the environment\n\
1948 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1949 set_history_size_command
,
1951 &sethistlist
, &showhistlist
);
1953 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
1954 &history_remove_duplicates
, _("\
1955 Set how far back in history to look for and remove duplicate entries."), _("\
1956 Show how far back in history to look for and remove duplicate entries."), _("\
1957 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1958 and remove the first history entry that is a duplicate of the most recent\n\
1959 entry, each time a new history entry is added.\n\
1960 If set to \"unlimited\", this lookbehind is unbounded.\n\
1961 Only history entries added during this session are considered for removal.\n\
1962 If set to 0, removal of duplicate history entries is disabled.\n\
1963 By default this option is set to 0."),
1965 show_history_remove_duplicates
,
1966 &sethistlist
, &showhistlist
);
1968 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1969 Set the filename in which to record the command history"), _("\
1970 Show the filename in which to record the command history"), _("\
1971 (the list of previous commands of which a record is kept)."),
1972 set_history_filename
,
1973 show_history_filename
,
1974 &sethistlist
, &showhistlist
);
1976 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
1977 Set whether to confirm potentially dangerous operations."), _("\
1978 Show whether to confirm potentially dangerous operations."), NULL
,
1981 &setlist
, &showlist
);
1983 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1984 Set annotation_level."), _("\
1985 Show annotation_level."), _("\
1986 0 == normal; 1 == fullname (for use when running under emacs)\n\
1987 2 == output annotated suitably for use by programs that control GDB."),
1989 show_annotation_level
,
1990 &setlist
, &showlist
);
1992 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1993 &exec_done_display_p
, _("\
1994 Set notification of completion for asynchronous execution commands."), _("\
1995 Show notification of completion for asynchronous execution commands."), _("\
1996 Use \"on\" to enable the notification, and \"off\" to disable it."),
1998 show_exec_done_display_p
,
1999 &setlist
, &showlist
);
2001 add_setshow_filename_cmd ("data-directory", class_maintenance
,
2002 &staged_gdb_datadir
, _("Set GDB's data directory."),
2003 _("Show GDB's data directory."),
2005 When set, GDB uses the specified path to search for data files."),
2006 set_gdb_datadir
, show_gdb_datadir
,
2012 gdb_init (char *argv0
)
2014 if (pre_init_ui_hook
)
2015 pre_init_ui_hook ();
2017 /* Run the init function of each source file. */
2020 /* Make sure we return to the original directory upon exit, come
2021 what may, since the OS doesn't do that for us. */
2022 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
2025 init_cmd_lists (); /* This needs to be done first. */
2026 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2027 initialize_utils (); /* Make errors and warnings possible. */
2031 /* Here is where we call all the _initialize_foo routines. */
2032 initialize_all_files ();
2034 /* This creates the current_program_space. Do this after all the
2035 _initialize_foo routines have had a chance to install their
2036 per-sspace data keys. Also do this before
2037 initialize_current_architecture is called, because it accesses
2038 exec_bfd of the current program space. */
2039 initialize_progspace ();
2040 initialize_inferiors ();
2041 initialize_current_architecture ();
2043 init_main (); /* But that omits this file! Do it now. */
2045 initialize_stdin_serial ();
2047 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2049 set_initial_gdb_ttystate ();
2051 async_init_signals ();
2053 /* We need a default language for parsing expressions, so simple
2054 things like "set width 0" won't fail if no language is explicitly
2055 set in a config file or implicitly set by reading an executable
2057 set_language (language_c
);
2058 expected_language
= current_language
; /* Don't warn about the change. */
2060 /* Python initialization, for example, can require various commands to be
2061 installed. For example "info pretty-printer" needs the "info"
2062 prefix to be installed. Keep things simple and just do final
2063 script initialization here. */
2064 finish_ext_lang_initialization ();