1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "cli/cli-cmds.h"
23 #include "cli/cli-script.h"
24 #include "cli/cli-setshow.h"
25 #include "cli/cli-decode.h"
31 #include "target-dcache.h"
32 #include "breakpoint.h"
34 #include "expression.h"
37 #include "terminal.h" /* For job_control. */
39 #include "completer.h"
45 #include "event-loop.h"
46 #include "gdbthread.h"
47 #include "extension.h"
51 #include "filenames.h"
54 /* readline include files. */
55 #include "readline/readline.h"
56 #include "readline/history.h"
58 /* readline defines this. */
61 #include <sys/types.h>
63 #include "event-top.h"
68 #include "tracepoint.h"
75 extern void initialize_all_files (void);
77 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
78 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
79 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
81 /* Default command line prompt. This is overriden in some configs. */
83 #ifndef DEFAULT_PROMPT
84 #define DEFAULT_PROMPT "(gdb) "
87 /* Initialization file name for gdb. This is host-dependent. */
89 const char gdbinit[] = GDBINIT;
91 int inhibit_gdbinit = 0;
93 extern char lang_frame_mismatch_warn[]; /* language.c */
95 /* Flag for whether we want to confirm potentially dangerous
96 operations. Default is yes. */
101 show_confirm (struct ui_file *file, int from_tty,
102 struct cmd_list_element *c, const char *value)
104 fprintf_filtered (file, _("Whether to confirm potentially "
105 "dangerous operations is %s.\n"),
109 /* stdio stream that command input is being read from. Set to stdin
110 normally. Set by source_command to the file we are sourcing. Set
111 to NULL if we are executing a user-defined command or interacting
116 /* Flag to indicate whether a user defined command is currently running. */
120 /* Current working directory. */
122 char *current_directory;
124 /* The directory name is actually stored here (usually). */
125 char gdb_dirbuf[1024];
127 /* Function to call before reading a command, if nonzero.
128 The function receives two args: an input stream,
129 and a prompt string. */
131 void (*window_hook) (FILE *, char *);
133 /* Buffer used for reading command lines, and the size
134 allocated for it so far. */
136 char *saved_command_line;
137 int saved_command_line_size = 100;
139 /* Nonzero if the current command is modified by "server ". This
140 affects things like recording into the command history, commands
141 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
142 whatever) can issue its own commands and also send along commands
143 from the user, and have the user not notice that the user interface
144 is issuing commands too. */
147 /* Timeout limit for response from target. */
149 /* The default value has been changed many times over the years. It
150 was originally 5 seconds. But that was thought to be a long time
151 to sit and wait, so it was changed to 2 seconds. That was thought
152 to be plenty unless the connection was going through some terminal
153 server or multiplexer or other form of hairy serial connection.
155 In mid-1996, remote_timeout was moved from remote.c to top.c and
156 it began being used in other remote-* targets. It appears that the
157 default was changed to 20 seconds at that time, perhaps because the
158 Renesas E7000 ICE didn't always respond in a timely manner.
160 But if 5 seconds is a long time to sit and wait for retransmissions,
161 20 seconds is far worse. This demonstrates the difficulty of using
162 a single variable for all protocol timeouts.
164 As remote.c is used much more than remote-e7000.c, it was changed
165 back to 2 seconds in 1999. */
167 int remote_timeout = 2;
169 /* Non-zero tells remote* modules to output debugging info. */
171 int remote_debug = 0;
173 /* Sbrk location on entry to main. Used for statistics only. */
178 /* Hooks for alternate command interfaces. */
180 /* This hook is called from within gdb's many mini-event loops which
181 could steal control from a real user interface's event loop. It
182 returns non-zero if the user is requesting a detach, zero
185 int (*deprecated_ui_loop_hook) (int);
188 /* Called from print_frame_info to list the line we stopped in. */
190 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
194 /* Replaces most of query. */
196 int (*deprecated_query_hook) (const char *, va_list);
198 /* Replaces most of warning. */
200 void (*deprecated_warning_hook) (const char *, va_list);
202 /* These three functions support getting lines of text from the user.
203 They are used in sequence. First deprecated_readline_begin_hook is
204 called with a text string that might be (for example) a message for
205 the user to type in a sequence of commands to be executed at a
206 breakpoint. If this function calls back to a GUI, it might take
207 this opportunity to pop up a text interaction window with this
208 message. Next, deprecated_readline_hook is called with a prompt
209 that is emitted prior to collecting the user input. It can be
210 called multiple times. Finally, deprecated_readline_end_hook is
211 called to notify the GUI that we are done with the interaction
212 window and it can close it. */
214 void (*deprecated_readline_begin_hook) (char *, ...);
215 char *(*deprecated_readline_hook) (const char *);
216 void (*deprecated_readline_end_hook) (void);
218 /* Called as appropriate to notify the interface that we have attached
219 to or detached from an already running process. */
221 void (*deprecated_attach_hook) (void);
222 void (*deprecated_detach_hook) (void);
224 /* Called during long calculations to allow GUI to repair window
225 damage, and to check for stop buttons, etc... */
227 void (*deprecated_interactive_hook) (void);
229 /* Called when going to wait for the target. Usually allows the GUI
230 to run while waiting for target events. */
232 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
233 struct target_waitstatus *status,
236 /* Used by UI as a wrapper around command execution. May do various
237 things like enabling/disabling buttons, etc... */
239 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
240 char *cmd, int from_tty);
242 /* Called when the current thread changes. Argument is thread id. */
244 void (*deprecated_context_hook) (int id);
246 /* Handler for SIGHUP. */
249 /* NOTE 1999-04-29: This function will be static again, once we modify
250 gdb to use the event loop as the default command loop and we merge
251 event-top.c into this file, top.c. */
255 /* Stop asking user for confirmation --- we're exiting. This
256 prevents asking the user dumb questions. */
258 quit_command ((char *) 0, 0);
260 #endif /* defined SIGHUP */
262 /* Line number we are currently in, in a file which is being sourced. */
263 /* NOTE 1999-04-29: This variable will be static again, once we modify
264 gdb to use the event loop as the default command loop and we merge
265 event-top.c into this file, top.c. */
266 /* static */ int source_line_number;
268 /* Name of the file we are sourcing. */
269 /* NOTE 1999-04-29: This variable will be static again, once we modify
270 gdb to use the event loop as the default command loop and we merge
271 event-top.c into this file, top.c. */
272 /* static */ const char *source_file_name;
274 /* Clean up on error during a "source" command (or execution of a
275 user-defined command). */
278 do_restore_instream_cleanup (void *stream)
280 /* Restore the previous input stream. */
284 /* Read commands from STREAM. */
286 read_command_file (FILE *stream)
288 struct cleanup *cleanups;
290 cleanups = make_cleanup (do_restore_instream_cleanup, instream);
293 do_cleanups (cleanups);
296 void (*pre_init_ui_hook) (void);
300 do_chdir_cleanup (void *old_dir)
308 prepare_execute_command (void)
311 struct cleanup *cleanup;
313 mark = value_mark ();
314 cleanup = make_cleanup_value_free_to_mark (mark);
316 /* With multiple threads running while the one we're examining is
317 stopped, the dcache can get stale without us being able to detect
318 it. For the duration of the command, though, use the dcache to
319 help things like backtrace. */
321 target_dcache_invalidate ();
326 /* Tell the user if the language has changed (except first time) after
327 executing a command. */
330 check_frame_language_change (void)
332 static int warned = 0;
333 struct frame_info *frame;
335 /* First make sure that a new frame has been selected, in case the
336 command or the hooks changed the program state. */
337 frame = deprecated_safe_get_selected_frame ();
338 if (current_language != expected_language)
340 if (language_mode == language_mode_auto && info_verbose)
342 language_info (1); /* Print what changed. */
347 /* Warn the user if the working language does not match the language
348 of the current frame. Only warn the user if we are actually
349 running the program, i.e. there is a stack. */
350 /* FIXME: This should be cacheing the frame and only running when
351 the frame changes. */
353 if (has_stack_frames ())
357 flang = get_frame_language (frame);
359 && flang != language_unknown
360 && flang != current_language->la_language)
362 printf_filtered ("%s\n", lang_frame_mismatch_warn);
371 maybe_wait_sync_command_done (int was_sync)
373 /* If the interpreter is in sync mode (we're running a user
374 command's list, running command hooks or similars), and we
375 just ran a synchronous command that started the target, wait
376 for that command to end. */
377 if (!interpreter_async && !was_sync && sync_execution)
379 while (gdb_do_one_event () >= 0)
385 /* Execute the line P as a command, in the current user context.
386 Pass FROM_TTY as second argument to the defining function. */
389 execute_command (char *p, int from_tty)
391 struct cleanup *cleanup_if_error, *cleanup;
392 struct cmd_list_element *c;
395 cleanup_if_error = make_bpstat_clear_actions_cleanup ();
396 cleanup = prepare_execute_command ();
398 /* Force cleanup of any alloca areas if using C alloca instead of
402 /* This can happen when command_line_input hits end of file. */
405 do_cleanups (cleanup);
406 discard_cleanups (cleanup_if_error);
410 target_log_command (p);
412 while (*p == ' ' || *p == '\t')
418 int was_sync = sync_execution;
422 /* If trace-commands is set then this will print this command. */
423 print_command_trace (p);
425 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
428 /* Pass null arg rather than an empty one. */
431 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
432 while the is_complete_command(cfunc) test is just plain
433 bogus. They should both be replaced by a test of the form
434 c->strip_trailing_white_space_p. */
435 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
436 can't be replaced with func. This is because it is the
437 cfunc, and not the func, that has the value that the
438 is_complete_command hack is testing for. */
439 /* Clear off trailing whitespace, except for set and complete
442 && c->type != set_cmd
443 && !is_complete_command (c))
445 p = arg + strlen (arg) - 1;
446 while (p >= arg && (*p == ' ' || *p == '\t'))
451 /* If this command has been pre-hooked, run the hook first. */
452 execute_cmd_pre_hook (c);
454 if (c->deprecated_warn_user)
455 deprecated_cmd_warning (line);
457 /* c->user_commands would be NULL in the case of a python command. */
458 if (c->theclass == class_user && c->user_commands)
459 execute_user_command (c, arg);
460 else if (c->type == set_cmd)
461 do_set_command (arg, from_tty, c);
462 else if (c->type == show_cmd)
463 do_show_command (arg, from_tty, c);
464 else if (!cmd_func_p (c))
465 error (_("That is not a command, just a help topic."));
466 else if (deprecated_call_command_hook)
467 deprecated_call_command_hook (c, arg, from_tty);
469 cmd_func (c, arg, from_tty);
471 maybe_wait_sync_command_done (was_sync);
473 /* If this command has been post-hooked, run the hook last. */
474 execute_cmd_post_hook (c);
478 check_frame_language_change ();
480 do_cleanups (cleanup);
481 discard_cleanups (cleanup_if_error);
484 /* Run execute_command for P and FROM_TTY. Capture its output into the
485 returned string, do not display it to the screen. BATCH_FLAG will be
486 temporarily set to true. */
489 execute_command_to_string (char *p, int from_tty)
491 struct ui_file *str_file;
492 struct cleanup *cleanup;
495 /* GDB_STDOUT should be better already restored during these
496 restoration callbacks. */
497 cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
499 make_cleanup_restore_integer (&interpreter_async);
500 interpreter_async = 0;
502 str_file = mem_fileopen ();
504 make_cleanup_ui_file_delete (str_file);
505 make_cleanup_restore_ui_file (&gdb_stdout);
506 make_cleanup_restore_ui_file (&gdb_stderr);
507 make_cleanup_restore_ui_file (&gdb_stdlog);
508 make_cleanup_restore_ui_file (&gdb_stdtarg);
509 make_cleanup_restore_ui_file (&gdb_stdtargerr);
511 if (ui_out_redirect (current_uiout, str_file) < 0)
512 warning (_("Current output protocol does not support redirection"));
514 make_cleanup_ui_out_redirect_pop (current_uiout);
516 gdb_stdout = str_file;
517 gdb_stderr = str_file;
518 gdb_stdlog = str_file;
519 gdb_stdtarg = str_file;
520 gdb_stdtargerr = str_file;
522 execute_command (p, from_tty);
524 retval = ui_file_xstrdup (str_file, NULL);
526 do_cleanups (cleanup);
531 /* Read commands from `instream' and execute them
532 until end of file or error reading instream. */
537 struct cleanup *old_chain;
539 int stdin_is_tty = ISATTY (stdin);
541 while (instream && !feof (instream))
543 if (window_hook && instream == stdin)
544 (*window_hook) (instream, get_prompt ());
547 if (instream == stdin && stdin_is_tty)
548 reinitialize_more_filter ();
549 old_chain = make_cleanup (null_cleanup, 0);
551 /* Get a command-line. This calls the readline package. */
552 command = command_line_input (instream == stdin ?
553 get_prompt () : (char *) NULL,
554 instream == stdin, "prompt");
557 do_cleanups (old_chain);
561 make_command_stats_cleanup (1);
563 /* Do not execute commented lines. */
564 if (command[0] != '#')
566 execute_command (command, instream == stdin);
568 /* Do any commands attached to breakpoint we are stopped at. */
569 bpstat_do_actions ();
571 do_cleanups (old_chain);
575 /* When nonzero, cause dont_repeat to do nothing. This should only be
576 set via prevent_dont_repeat. */
578 static int suppress_dont_repeat = 0;
580 /* Commands call this if they do not want to be repeated by null lines. */
585 if (suppress_dont_repeat || server_command)
588 /* If we aren't reading from standard input, we are saving the last
589 thing read from stdin in line and don't want to delete it. Null
590 lines won't repeat here in any case. */
591 if (instream == stdin)
592 *saved_command_line = 0;
595 /* Prevent dont_repeat from working, and return a cleanup that
596 restores the previous state. */
599 prevent_dont_repeat (void)
601 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
603 suppress_dont_repeat = 1;
608 /* Read a line from the stream "instream" without command line editing.
610 It prints PROMPT_ARG once at the start.
611 Action is compatible with "readline", e.g. space for the result is
612 malloc'd and should be freed by the caller.
614 A NULL return means end of file. */
616 gdb_readline (const char *prompt_arg)
621 int result_size = 80;
625 /* Don't use a _filtered function here. It causes the assumed
626 character position to be off, since the newline we read from
627 the user is not accounted for. */
628 fputs_unfiltered (prompt_arg, gdb_stdout);
629 gdb_flush (gdb_stdout);
632 result = (char *) xmalloc (result_size);
636 /* Read from stdin if we are executing a user defined command.
637 This is the right thing for prompt_for_continue, at least. */
638 c = fgetc (instream ? instream : stdin);
643 /* The last line does not end with a newline. Return it, and
644 if we are called again fgetc will still return EOF and
645 we'll return NULL then. */
653 if (input_index > 0 && result[input_index - 1] == '\r')
658 result[input_index++] = c;
659 while (input_index >= result_size)
662 result = (char *) xrealloc (result, result_size);
666 result[input_index++] = '\0';
670 /* Variables which control command line editing and history
671 substitution. These variables are given default values at the end
673 static int command_editing_p;
675 /* NOTE 1999-04-29: This variable will be static again, once we modify
676 gdb to use the event loop as the default command loop and we merge
677 event-top.c into this file, top.c. */
679 /* static */ int history_expansion_p;
681 static int write_history_p;
683 show_write_history_p (struct ui_file *file, int from_tty,
684 struct cmd_list_element *c, const char *value)
686 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
690 /* The variable associated with the "set/show history size"
691 command. The value -1 means unlimited, and -2 means undefined. */
692 static int history_size_setshow_var = -2;
695 show_history_size (struct ui_file *file, int from_tty,
696 struct cmd_list_element *c, const char *value)
698 fprintf_filtered (file, _("The size of the command history is %s.\n"),
702 /* Variable associated with the "history remove-duplicates" option.
703 The value -1 means unlimited. */
704 static int history_remove_duplicates = 0;
707 show_history_remove_duplicates (struct ui_file *file, int from_tty,
708 struct cmd_list_element *c, const char *value)
710 fprintf_filtered (file,
711 _("The number of history entries to look back at for "
712 "duplicates is %s.\n"),
716 static char *history_filename;
718 show_history_filename (struct ui_file *file, int from_tty,
719 struct cmd_list_element *c, const char *value)
721 fprintf_filtered (file, _("The filename in which to record "
722 "the command history is \"%s\".\n"),
726 /* This is like readline(), but it has some gdb-specific behavior.
727 gdb may want readline in both the synchronous and async modes during
728 a single gdb invocation. At the ordinary top-level prompt we might
729 be using the async readline. That means we can't use
730 rl_pre_input_hook, since it doesn't work properly in async mode.
731 However, for a secondary prompt (" >", such as occurs during a
732 `define'), gdb wants a synchronous response.
734 We used to call readline() directly, running it in synchronous
735 mode. But mixing modes this way is not supported, and as of
736 readline 5.x it no longer works; the arrow keys come unbound during
737 the synchronous call. So we make a nested call into the event
738 loop. That's what gdb_readline_wrapper is for. */
740 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
741 rely on gdb_readline_wrapper_result, which might still be NULL if
742 the user types Control-D for EOF. */
743 static int gdb_readline_wrapper_done;
745 /* The result of the current call to gdb_readline_wrapper, once a newline
747 static char *gdb_readline_wrapper_result;
749 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
750 to be called after the newline is processed (which will redisplay
751 the prompt). But in gdb_readline_wrapper we will not get a new
752 prompt until the next call, or until we return to the event loop.
753 So we disable this hook around the newline and restore it before we
755 static void (*saved_after_char_processing_hook) (void);
757 /* This function is called when readline has seen a complete line of
761 gdb_readline_wrapper_line (char *line)
763 gdb_assert (!gdb_readline_wrapper_done);
764 gdb_readline_wrapper_result = line;
765 gdb_readline_wrapper_done = 1;
767 /* Prevent operate-and-get-next from acting too early. */
768 saved_after_char_processing_hook = after_char_processing_hook;
769 after_char_processing_hook = NULL;
771 /* Prevent parts of the prompt from being redisplayed if annotations
772 are enabled, and readline's state getting out of sync. We'll
773 reinstall the callback handler, which puts the terminal in raw
774 mode (or in readline lingo, in prepped state), when we're next
775 ready to process user input, either in display_gdb_prompt, or if
776 we're handling an asynchronous target event and running in the
777 background, just before returning to the event loop to process
778 further input (or more target events). */
779 if (async_command_editing_p)
780 gdb_rl_callback_handler_remove ();
783 struct gdb_readline_wrapper_cleanup
785 void (*handler_orig) (char *);
786 int already_prompted_orig;
788 /* Whether the target was async. */
789 int target_is_async_orig;
793 gdb_readline_wrapper_cleanup (void *arg)
795 struct gdb_readline_wrapper_cleanup *cleanup = arg;
797 rl_already_prompted = cleanup->already_prompted_orig;
799 gdb_assert (input_handler == gdb_readline_wrapper_line);
800 input_handler = cleanup->handler_orig;
802 /* Don't restore our input handler in readline yet. That would make
803 readline prep the terminal (putting it in raw mode), while the
804 line we just read may trigger execution of a command that expects
805 the terminal in the default cooked/canonical mode, such as e.g.,
806 running Python's interactive online help utility. See
807 gdb_readline_wrapper_line for when we'll reinstall it. */
809 gdb_readline_wrapper_result = NULL;
810 gdb_readline_wrapper_done = 0;
812 after_char_processing_hook = saved_after_char_processing_hook;
813 saved_after_char_processing_hook = NULL;
815 if (cleanup->target_is_async_orig)
822 gdb_readline_wrapper (const char *prompt)
824 struct cleanup *back_to;
825 struct gdb_readline_wrapper_cleanup *cleanup;
828 cleanup = xmalloc (sizeof (*cleanup));
829 cleanup->handler_orig = input_handler;
830 input_handler = gdb_readline_wrapper_line;
832 cleanup->already_prompted_orig = rl_already_prompted;
834 cleanup->target_is_async_orig = target_is_async_p ();
836 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
838 if (cleanup->target_is_async_orig)
841 /* Display our prompt and prevent double prompt display. */
842 display_gdb_prompt (prompt);
843 rl_already_prompted = 1;
845 if (after_char_processing_hook)
846 (*after_char_processing_hook) ();
847 gdb_assert (after_char_processing_hook == NULL);
849 while (gdb_do_one_event () >= 0)
850 if (gdb_readline_wrapper_done)
853 retval = gdb_readline_wrapper_result;
854 do_cleanups (back_to);
859 /* The current saved history number from operate-and-get-next.
860 This is -1 if not valid. */
861 static int operate_saved_history = -1;
863 /* This is put on the appropriate hook and helps operate-and-get-next
866 gdb_rl_operate_and_get_next_completion (void)
868 int delta = where_history () - operate_saved_history;
870 /* The `key' argument to rl_get_previous_history is ignored. */
871 rl_get_previous_history (delta, 0);
872 operate_saved_history = -1;
874 /* readline doesn't automatically update the display for us. */
877 after_char_processing_hook = NULL;
878 rl_pre_input_hook = NULL;
881 /* This is a gdb-local readline command handler. It accepts the
882 current command line (like RET does) and, if this command was taken
883 from the history, arranges for the next command in the history to
884 appear on the command line when the prompt returns.
885 We ignore the arguments. */
887 gdb_rl_operate_and_get_next (int count, int key)
891 /* Use the async hook. */
892 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
894 /* Find the current line, and find the next line to use. */
895 where = where_history();
897 if ((history_is_stifled () && (history_length >= history_max_entries))
898 || (where >= history_length - 1))
899 operate_saved_history = where;
901 operate_saved_history = where + 1;
903 return rl_newline (1, key);
906 /* Number of user commands executed during this session. */
908 static int command_count = 0;
910 /* Add the user command COMMAND to the input history list. */
913 gdb_add_history (const char *command)
917 if (history_remove_duplicates != 0)
920 int lookbehind_threshold;
922 /* The lookbehind threshold for finding a duplicate history entry is
923 bounded by command_count because we can't meaningfully delete
924 history entries that are already stored in the history file since
925 the history file is appended to. */
926 if (history_remove_duplicates == -1
927 || history_remove_duplicates > command_count)
928 lookbehind_threshold = command_count;
930 lookbehind_threshold = history_remove_duplicates;
933 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
935 HIST_ENTRY *temp = previous_history ();
940 if (strcmp (temp->line, command) == 0)
942 HIST_ENTRY *prev = remove_history (where_history ());
944 free_history_entry (prev);
951 add_history (command);
954 /* Safely append new history entries to the history file in a corruption-free
955 way using an intermediate local history file. */
958 gdb_safe_append_history (void)
960 int ret, saved_errno;
961 char *local_history_filename;
962 struct cleanup *old_chain;
964 local_history_filename
965 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
966 old_chain = make_cleanup (xfree, local_history_filename);
968 ret = rename (history_filename, local_history_filename);
970 if (ret < 0 && saved_errno != ENOENT)
972 warning (_("Could not rename %s to %s: %s"),
973 history_filename, local_history_filename,
974 safe_strerror (saved_errno));
980 /* If the rename failed with ENOENT then either the global history
981 file never existed in the first place or another GDB process is
982 currently appending to it (and has thus temporarily renamed it).
983 Since we can't distinguish between these two cases, we have to
984 conservatively assume the first case and therefore must write out
985 (not append) our known history to our local history file and try
986 to move it back anyway. Otherwise a global history file would
987 never get created! */
988 gdb_assert (saved_errno == ENOENT);
989 write_history (local_history_filename);
993 append_history (command_count, local_history_filename);
994 if (history_is_stifled ())
995 history_truncate_file (local_history_filename, history_max_entries);
998 ret = rename (local_history_filename, history_filename);
1000 if (ret < 0 && saved_errno != EEXIST)
1001 warning (_("Could not rename %s to %s: %s"),
1002 local_history_filename, history_filename,
1003 safe_strerror (saved_errno));
1006 do_cleanups (old_chain);
1009 /* Read one line from the command input stream `instream'
1010 into the local static buffer `linebuffer' (whose current length
1012 The buffer is made bigger as necessary.
1013 Returns the address of the start of the line.
1015 NULL is returned for end of file.
1017 *If* the instream == stdin & stdin is a terminal, the line read
1018 is copied into the file line saver (global var char *line,
1019 length linesize) so that it can be duplicated.
1021 This routine either uses fancy command line editing or
1022 simple input as the user has requested. */
1025 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1027 static char *linebuffer = 0;
1028 static unsigned linelength = 0;
1029 const char *prompt = prompt_arg;
1036 /* The annotation suffix must be non-NULL. */
1037 if (annotation_suffix == NULL)
1038 annotation_suffix = "";
1040 if (annotation_level > 1 && instream == stdin)
1044 local_prompt = alloca ((prompt == NULL ? 0 : strlen (prompt))
1045 + strlen (annotation_suffix) + 40);
1047 local_prompt[0] = '\0';
1049 strcpy (local_prompt, prompt);
1050 strcat (local_prompt, "\n\032\032");
1051 strcat (local_prompt, annotation_suffix);
1052 strcat (local_prompt, "\n");
1054 prompt = local_prompt;
1057 if (linebuffer == 0)
1060 linebuffer = (char *) xmalloc (linelength);
1065 /* Control-C quits instantly if typed while in this loop
1066 since it should not wait until the user types a newline. */
1071 signal (STOP_SIGNAL, handle_stop_sig);
1076 /* Make sure that all output has been output. Some machines may
1077 let you get away with leaving out some of the gdb_flush, but
1080 gdb_flush (gdb_stdout);
1081 gdb_flush (gdb_stderr);
1083 if (source_file_name != NULL)
1084 ++source_line_number;
1086 if (annotation_level > 1 && instream == stdin)
1088 puts_unfiltered ("\n\032\032pre-");
1089 puts_unfiltered (annotation_suffix);
1090 puts_unfiltered ("\n");
1093 /* Don't use fancy stuff if not talking to stdin. */
1094 if (deprecated_readline_hook && input_from_terminal_p ())
1096 rl = (*deprecated_readline_hook) (prompt);
1098 else if (command_editing_p && input_from_terminal_p ())
1100 rl = gdb_readline_wrapper (prompt);
1104 rl = gdb_readline (prompt);
1107 if (annotation_level > 1 && instream == stdin)
1109 puts_unfiltered ("\n\032\032post-");
1110 puts_unfiltered (annotation_suffix);
1111 puts_unfiltered ("\n");
1114 if (!rl || rl == (char *) EOF)
1119 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
1121 linelength = strlen (rl) + 1 + (p - linebuffer);
1122 nline = (char *) xrealloc (linebuffer, linelength);
1123 p += nline - linebuffer;
1127 /* Copy line. Don't copy null at end. (Leaves line alone
1128 if this was just a newline). */
1132 xfree (rl); /* Allocated in readline. */
1134 if (p == linebuffer || *(p - 1) != '\\')
1137 p--; /* Put on top of '\'. */
1143 signal (STOP_SIGNAL, SIG_DFL);
1150 #define SERVER_COMMAND_LENGTH 7
1152 (p - linebuffer > SERVER_COMMAND_LENGTH)
1153 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
1156 /* Note that we don't set `line'. Between this and the check in
1157 dont_repeat, this insures that repeating will still do the
1160 return linebuffer + SERVER_COMMAND_LENGTH;
1163 /* Do history expansion if that is wished. */
1164 if (history_expansion_p && instream == stdin
1165 && ISATTY (instream))
1167 char *history_value;
1170 *p = '\0'; /* Insert null now. */
1171 expanded = history_expand (linebuffer, &history_value);
1174 /* Print the changes. */
1175 printf_unfiltered ("%s\n", history_value);
1177 /* If there was an error, call this function again. */
1180 xfree (history_value);
1181 return command_line_input (prompt, repeat,
1184 if (strlen (history_value) > linelength)
1186 linelength = strlen (history_value) + 1;
1187 linebuffer = (char *) xrealloc (linebuffer, linelength);
1189 strcpy (linebuffer, history_value);
1190 p = linebuffer + strlen (linebuffer);
1192 xfree (history_value);
1195 /* If we just got an empty line, and that is supposed to repeat the
1196 previous command, return the value in the global buffer. */
1197 if (repeat && p == linebuffer)
1198 return saved_command_line;
1199 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
1201 return saved_command_line;
1205 /* Add line to history if appropriate. */
1206 if (*linebuffer && input_from_terminal_p ())
1207 gdb_add_history (linebuffer);
1209 /* Save into global buffer if appropriate. */
1212 if (linelength > saved_command_line_size)
1214 saved_command_line = xrealloc (saved_command_line, linelength);
1215 saved_command_line_size = linelength;
1217 strcpy (saved_command_line, linebuffer);
1218 return saved_command_line;
1224 /* Print the GDB banner. */
1226 print_gdb_version (struct ui_file *stream)
1228 /* From GNU coding standards, first line is meant to be easy for a
1229 program to parse, and is just canonical program name and version
1230 number, which starts after last space. */
1232 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1234 /* Second line is a copyright notice. */
1236 fprintf_filtered (stream,
1237 "Copyright (C) 2015 Free Software Foundation, Inc.\n");
1239 /* Following the copyright is a brief statement that the program is
1240 free software, that users are free to copy and change it on
1241 certain conditions, that it is covered by the GNU GPL, and that
1242 there is no warranty. */
1244 fprintf_filtered (stream, "\
1245 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1246 \nThis is free software: you are free to change and redistribute it.\n\
1247 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1248 and \"show warranty\" for details.\n");
1250 /* After the required info we print the configuration information. */
1252 fprintf_filtered (stream, "This GDB was configured as \"");
1253 if (strcmp (host_name, target_name) != 0)
1255 fprintf_filtered (stream, "--host=%s --target=%s",
1256 host_name, target_name);
1260 fprintf_filtered (stream, "%s", host_name);
1262 fprintf_filtered (stream, "\".\n\
1263 Type \"show configuration\" for configuration details.");
1265 if (REPORT_BUGS_TO[0])
1267 fprintf_filtered (stream,
1268 _("\nFor bug reporting instructions, please see:\n"));
1269 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1271 fprintf_filtered (stream,
1272 _("Find the GDB manual and other documentation \
1273 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1274 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1275 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1276 commands related to \"word\"."));
1279 /* Print the details of GDB build-time configuration. */
1281 print_gdb_configuration (struct ui_file *stream)
1283 fprintf_filtered (stream, _("\
1284 This GDB was configured as follows:\n\
1285 configure --host=%s --target=%s\n\
1286 "), host_name, target_name);
1287 fprintf_filtered (stream, _("\
1288 --with-auto-load-dir=%s\n\
1289 --with-auto-load-safe-path=%s\n\
1290 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1292 fprintf_filtered (stream, _("\
1296 fprintf_filtered (stream, _("\
1301 fprintf_filtered (stream, _("\
1302 --with-gdb-datadir=%s%s\n\
1303 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1305 fprintf_filtered (stream, _("\
1306 --with-iconv-bin=%s%s\n\
1307 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1309 if (JIT_READER_DIR[0])
1310 fprintf_filtered (stream, _("\
1311 --with-jit-reader-dir=%s%s\n\
1312 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1313 #if HAVE_LIBUNWIND_IA64_H
1314 fprintf_filtered (stream, _("\
1315 --with-libunwind-ia64\n\
1318 fprintf_filtered (stream, _("\
1319 --without-libunwind-ia64\n\
1323 fprintf_filtered (stream, _("\
1327 fprintf_filtered (stream, _("\
1331 #ifdef WITH_PYTHON_PATH
1332 fprintf_filtered (stream, _("\
1333 --with-python=%s%s\n\
1334 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1337 fprintf_filtered (stream, _("\
1341 fprintf_filtered (stream, _("\
1346 fprintf_filtered (stream, _("\
1347 --with-relocated-sources=%s\n\
1351 fprintf_filtered (stream, _("\
1352 --with-separate-debug-dir=%s%s\n\
1353 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1354 if (TARGET_SYSTEM_ROOT[0])
1355 fprintf_filtered (stream, _("\
1356 --with-sysroot=%s%s\n\
1357 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1358 if (SYSTEM_GDBINIT[0])
1359 fprintf_filtered (stream, _("\
1360 --with-system-gdbinit=%s%s\n\
1361 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1362 #if HAVE_LIBBABELTRACE
1363 fprintf_filtered (stream, _("\
1364 --with-babeltrace\n\
1367 fprintf_filtered (stream, _("\
1368 --without-babeltrace\n\
1371 /* We assume "relocatable" will be printed at least once, thus we always
1372 print this text. It's a reasonably safe assumption for now. */
1373 fprintf_filtered (stream, _("\n\
1374 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1375 tree, and GDB will still find it.)\n\
1380 /* The current top level prompt, settable with "set prompt", and/or
1381 with the python `gdb.prompt_hook' hook. */
1382 static char *top_prompt;
1384 /* Access method for the GDB prompt string. */
1392 /* Set method for the GDB prompt string. */
1395 set_prompt (const char *s)
1397 char *p = xstrdup (s);
1410 /* Callback for iterate_over_inferiors. Kills or detaches the given
1411 inferior, depending on how we originally gained control of it. */
1414 kill_or_detach (struct inferior *inf, void *args)
1416 struct qt_args *qt = args;
1417 struct thread_info *thread;
1422 thread = any_thread_of_process (inf->pid);
1425 switch_to_thread (thread->ptid);
1427 /* Leave core files alone. */
1428 if (target_has_execution)
1430 if (inf->attach_flag)
1431 target_detach (qt->args, qt->from_tty);
1440 /* Callback for iterate_over_inferiors. Prints info about what GDB
1441 will do to each inferior on a "quit". ARG points to a struct
1442 ui_out where output is to be collected. */
1445 print_inferior_quit_action (struct inferior *inf, void *arg)
1447 struct ui_file *stb = arg;
1452 if (inf->attach_flag)
1453 fprintf_filtered (stb,
1454 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1455 target_pid_to_str (pid_to_ptid (inf->pid)));
1457 fprintf_filtered (stb,
1458 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1459 target_pid_to_str (pid_to_ptid (inf->pid)));
1464 /* If necessary, make the user confirm that we should quit. Return
1465 non-zero if we should quit, zero if we shouldn't. */
1470 struct ui_file *stb;
1471 struct cleanup *old_chain;
1475 /* Don't even ask if we're only debugging a core file inferior. */
1476 if (!have_live_inferiors ())
1479 /* Build the query string as a single string. */
1480 stb = mem_fileopen ();
1481 old_chain = make_cleanup_ui_file_delete (stb);
1483 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1484 iterate_over_inferiors (print_inferior_quit_action, stb);
1485 fprintf_filtered (stb, _("\nQuit anyway? "));
1487 str = ui_file_xstrdup (stb, NULL);
1488 make_cleanup (xfree, str);
1490 qr = query ("%s", str);
1491 do_cleanups (old_chain);
1495 /* Prepare to exit GDB cleanly by undoing any changes made to the
1496 terminal so that we leave the terminal in the state we acquired it. */
1499 undo_terminal_modifications_before_exit (void)
1501 target_terminal_ours ();
1505 if (async_command_editing_p)
1506 gdb_disable_readline ();
1510 /* Quit without asking for confirmation. */
1513 quit_force (char *args, int from_tty)
1518 undo_terminal_modifications_before_exit ();
1520 /* An optional expression may be used to cause gdb to terminate with the
1521 value of that expression. */
1524 struct value *val = parse_and_eval (args);
1526 exit_code = (int) value_as_long (val);
1528 else if (return_child_result)
1529 exit_code = return_child_result_value;
1532 qt.from_tty = from_tty;
1534 /* We want to handle any quit errors and exit regardless. */
1536 /* Get out of tfind mode, and kill or detach all inferiors. */
1539 disconnect_tracing ();
1540 iterate_over_inferiors (kill_or_detach, &qt);
1542 CATCH (ex, RETURN_MASK_ALL)
1544 exception_print (gdb_stderr, ex);
1548 /* Give all pushed targets a chance to do minimal cleanup, and pop
1554 CATCH (ex, RETURN_MASK_ALL)
1556 exception_print (gdb_stderr, ex);
1560 /* Save the history information if it is appropriate to do so. */
1563 if (write_history_p && history_filename
1564 && input_from_terminal_p ())
1565 gdb_safe_append_history ();
1567 CATCH (ex, RETURN_MASK_ALL)
1569 exception_print (gdb_stderr, ex);
1573 /* Do any final cleanups before exiting. */
1576 do_final_cleanups (all_cleanups ());
1578 CATCH (ex, RETURN_MASK_ALL)
1580 exception_print (gdb_stderr, ex);
1587 /* Returns whether GDB is running on a terminal and input is
1588 currently coming from that terminal. */
1591 input_from_terminal_p (void)
1596 if (gdb_has_a_terminal () && instream == stdin)
1599 /* If INSTREAM is unset, and we are not in a user command, we
1600 must be in Insight. That's like having a terminal, for our
1602 if (instream == NULL && !in_user_command)
1609 dont_repeat_command (char *ignored, int from_tty)
1611 /* Can't call dont_repeat here because we're not necessarily reading
1613 *saved_command_line = 0;
1616 /* Functions to manipulate command line editing control variables. */
1618 /* Number of commands to print in each call to show_commands. */
1619 #define Hist_print 10
1621 show_commands (char *args, int from_tty)
1623 /* Index for history commands. Relative to history_base. */
1626 /* Number of the history entry which we are planning to display next.
1627 Relative to history_base. */
1630 /* Print out some of the commands from the command history. */
1634 if (args[0] == '+' && args[1] == '\0')
1635 /* "info editing +" should print from the stored position. */
1638 /* "info editing <exp>" should print around command number <exp>. */
1639 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1641 /* "show commands" means print the last Hist_print commands. */
1644 num = history_length - Hist_print;
1650 /* If there are at least Hist_print commands, we want to display the last
1651 Hist_print rather than, say, the last 6. */
1652 if (history_length - num < Hist_print)
1654 num = history_length - Hist_print;
1660 offset < num + Hist_print && offset < history_length;
1663 printf_filtered ("%5d %s\n", history_base + offset,
1664 (history_get (history_base + offset))->line);
1667 /* The next command we want to display is the next one that we haven't
1671 /* If the user repeats this command with return, it should do what
1672 "show commands +" does. This is unnecessary if arg is null,
1673 because "show commands +" is not useful after "show commands". */
1674 if (from_tty && args)
1681 /* Update the size of our command history file to HISTORY_SIZE.
1683 A HISTORY_SIZE of -1 stands for unlimited. */
1686 set_readline_history_size (int history_size)
1688 gdb_assert (history_size >= -1);
1690 if (history_size == -1)
1691 unstifle_history ();
1693 stifle_history (history_size);
1696 /* Called by do_setshow_command. */
1698 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1700 set_readline_history_size (history_size_setshow_var);
1704 set_history (char *args, int from_tty)
1706 printf_unfiltered (_("\"set history\" must be followed "
1707 "by the name of a history subcommand.\n"));
1708 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1712 show_history (char *args, int from_tty)
1714 cmd_show_list (showhistlist, from_tty, "");
1717 int info_verbose = 0; /* Default verbose msgs off. */
1719 /* Called by do_setshow_command. An elaborate joke. */
1721 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1723 const char *cmdname = "verbose";
1724 struct cmd_list_element *showcmd;
1726 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1727 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1731 c->doc = "Set verbose printing of informational messages.";
1732 showcmd->doc = "Show verbose printing of informational messages.";
1736 c->doc = "Set verbosity.";
1737 showcmd->doc = "Show verbosity.";
1741 /* Init the history buffer. Note that we are called after the init file(s)
1742 have been read so that the user can change the history file via his
1743 .gdbinit file (for instance). The GDBHISTFILE environment variable
1744 overrides all of this. */
1751 tmpenv = getenv ("GDBHISTSIZE");
1758 tmpenv = skip_spaces (tmpenv);
1760 var = strtol (tmpenv, &endptr, 10);
1761 saved_errno = errno;
1762 endptr = skip_spaces (endptr);
1764 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1765 empty string, a negative number or a huge positive number (larger than
1766 INT_MAX) then set the history size to unlimited. Otherwise set our
1767 history size to the number we have read. This behavior is consistent
1768 with how bash handles HISTSIZE. */
1769 if (*endptr != '\0')
1771 else if (*tmpenv == '\0'
1774 /* On targets where INT_MAX == LONG_MAX, we have to look at
1775 errno after calling strtol to distinguish between a value that
1776 is exactly INT_MAX and an overflowing value that was clamped
1778 || (var == INT_MAX && saved_errno == ERANGE))
1779 history_size_setshow_var = -1;
1781 history_size_setshow_var = var;
1784 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1786 if (history_size_setshow_var == -2)
1787 history_size_setshow_var = 256;
1789 set_readline_history_size (history_size_setshow_var);
1791 tmpenv = getenv ("GDBHISTFILE");
1793 history_filename = xstrdup (tmpenv);
1794 else if (!history_filename)
1796 /* We include the current directory so that if the user changes
1797 directories the file written will be the same as the one
1800 /* No leading dots in file names are allowed on MSDOS. */
1801 history_filename = concat (current_directory, "/_gdb_history",
1804 history_filename = concat (current_directory, "/.gdb_history",
1808 read_history (history_filename);
1812 show_prompt (struct ui_file *file, int from_tty,
1813 struct cmd_list_element *c, const char *value)
1815 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1819 show_async_command_editing_p (struct ui_file *file, int from_tty,
1820 struct cmd_list_element *c, const char *value)
1822 fprintf_filtered (file, _("Editing of command lines as "
1823 "they are typed is %s.\n"),
1828 show_annotation_level (struct ui_file *file, int from_tty,
1829 struct cmd_list_element *c, const char *value)
1831 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1835 show_exec_done_display_p (struct ui_file *file, int from_tty,
1836 struct cmd_list_element *c, const char *value)
1838 fprintf_filtered (file, _("Notification of completion for "
1839 "asynchronous execution commands is %s.\n"),
1843 /* New values of the "data-directory" parameter are staged here. */
1844 static char *staged_gdb_datadir;
1846 /* "set" command for the gdb_datadir configuration variable. */
1849 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1851 set_gdb_data_directory (staged_gdb_datadir);
1852 observer_notify_gdb_datadir_changed ();
1855 /* "show" command for the gdb_datadir configuration variable. */
1858 show_gdb_datadir (struct ui_file *file, int from_tty,
1859 struct cmd_list_element *c, const char *value)
1861 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1866 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1868 /* We include the current directory so that if the user changes
1869 directories the file written will be the same as the one
1871 if (!IS_ABSOLUTE_PATH (history_filename))
1872 history_filename = reconcat (history_filename, current_directory, "/",
1873 history_filename, (char *) NULL);
1879 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1880 the DEFAULT_PROMPT is. */
1881 set_prompt (DEFAULT_PROMPT);
1883 /* Set things up for annotation_level > 1, if the user ever decides
1885 async_annotation_suffix = "prompt";
1887 /* Set the important stuff up for command editing. */
1888 command_editing_p = 1;
1889 history_expansion_p = 0;
1890 write_history_p = 0;
1892 /* Setup important stuff for command line editing. */
1893 rl_completion_word_break_hook = gdb_completion_word_break_characters;
1894 rl_completion_entry_function = readline_line_completion_function;
1895 rl_completer_word_break_characters = default_word_break_characters ();
1896 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1897 rl_completion_display_matches_hook = cli_display_match_list;
1898 rl_readline_name = "gdb";
1899 rl_terminal_name = getenv ("TERM");
1901 /* The name for this defun comes from Bash, where it originated.
1902 15 is Control-o, the same binding this function has in Bash. */
1903 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1905 add_setshow_string_cmd ("prompt", class_support,
1907 _("Set gdb's prompt"),
1908 _("Show gdb's prompt"),
1911 &setlist, &showlist);
1913 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1914 Don't repeat this command.\nPrimarily \
1915 used inside of user-defined commands that should not be repeated when\n\
1918 add_setshow_boolean_cmd ("editing", class_support,
1919 &async_command_editing_p, _("\
1920 Set editing of command lines as they are typed."), _("\
1921 Show editing of command lines as they are typed."), _("\
1922 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1923 Without an argument, command line editing is enabled. To edit, use\n\
1924 EMACS-like or VI-like commands like control-P or ESC."),
1925 set_async_editing_command,
1926 show_async_command_editing_p,
1927 &setlist, &showlist);
1929 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1930 Set saving of the history record on exit."), _("\
1931 Show saving of the history record on exit."), _("\
1932 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1933 Without an argument, saving is enabled."),
1935 show_write_history_p,
1936 &sethistlist, &showhistlist);
1938 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
1939 &history_size_setshow_var, _("\
1940 Set the size of the command history,"), _("\
1941 Show the size of the command history,"), _("\
1942 ie. the number of previous commands to keep a record of.\n\
1943 If set to \"unlimited\", the number of commands kept in the history\n\
1944 list is unlimited. This defaults to the value of the environment\n\
1945 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1946 set_history_size_command,
1948 &sethistlist, &showhistlist);
1950 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
1951 &history_remove_duplicates, _("\
1952 Set how far back in history to look for and remove duplicate entries."), _("\
1953 Show how far back in history to look for and remove duplicate entries."), _("\
1954 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1955 and remove the first history entry that is a duplicate of the most recent\n\
1956 entry, each time a new history entry is added.\n\
1957 If set to \"unlimited\", this lookbehind is unbounded.\n\
1958 Only history entries added during this session are considered for removal.\n\
1959 If set to 0, removal of duplicate history entries is disabled.\n\
1960 By default this option is set to 0."),
1962 show_history_remove_duplicates,
1963 &sethistlist, &showhistlist);
1965 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1966 Set the filename in which to record the command history"), _("\
1967 Show the filename in which to record the command history"), _("\
1968 (the list of previous commands of which a record is kept)."),
1969 set_history_filename,
1970 show_history_filename,
1971 &sethistlist, &showhistlist);
1973 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
1974 Set whether to confirm potentially dangerous operations."), _("\
1975 Show whether to confirm potentially dangerous operations."), NULL,
1978 &setlist, &showlist);
1980 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1981 Set annotation_level."), _("\
1982 Show annotation_level."), _("\
1983 0 == normal; 1 == fullname (for use when running under emacs)\n\
1984 2 == output annotated suitably for use by programs that control GDB."),
1986 show_annotation_level,
1987 &setlist, &showlist);
1989 add_setshow_boolean_cmd ("exec-done-display", class_support,
1990 &exec_done_display_p, _("\
1991 Set notification of completion for asynchronous execution commands."), _("\
1992 Show notification of completion for asynchronous execution commands."), _("\
1993 Use \"on\" to enable the notification, and \"off\" to disable it."),
1995 show_exec_done_display_p,
1996 &setlist, &showlist);
1998 add_setshow_filename_cmd ("data-directory", class_maintenance,
1999 &staged_gdb_datadir, _("Set GDB's data directory."),
2000 _("Show GDB's data directory."),
2002 When set, GDB uses the specified path to search for data files."),
2003 set_gdb_datadir, show_gdb_datadir,
2009 gdb_init (char *argv0)
2011 if (pre_init_ui_hook)
2012 pre_init_ui_hook ();
2014 /* Run the init function of each source file. */
2017 /* Make sure we return to the original directory upon exit, come
2018 what may, since the OS doesn't do that for us. */
2019 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2022 init_cmd_lists (); /* This needs to be done first. */
2023 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2024 initialize_utils (); /* Make errors and warnings possible. */
2028 /* Here is where we call all the _initialize_foo routines. */
2029 initialize_all_files ();
2031 /* This creates the current_program_space. Do this after all the
2032 _initialize_foo routines have had a chance to install their
2033 per-sspace data keys. Also do this before
2034 initialize_current_architecture is called, because it accesses
2035 exec_bfd of the current program space. */
2036 initialize_progspace ();
2037 initialize_inferiors ();
2038 initialize_current_architecture ();
2040 init_main (); /* But that omits this file! Do it now. */
2042 initialize_stdin_serial ();
2044 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2046 set_initial_gdb_ttystate ();
2048 async_init_signals ();
2050 /* We need a default language for parsing expressions, so simple
2051 things like "set width 0" won't fail if no language is explicitly
2052 set in a config file or implicitly set by reading an executable
2054 set_language (language_c);
2055 expected_language = current_language; /* Don't warn about the change. */
2057 /* Python initialization, for example, can require various commands to be
2058 installed. For example "info pretty-printer" needs the "info"
2059 prefix to be installed. Keep things simple and just do final
2060 script initialization here. */
2061 finish_ext_lang_initialization ();