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"
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 /* Buffer used for reading command lines, and the size
128 allocated for it so far. */
130 char *saved_command_line;
131 int saved_command_line_size = 100;
133 /* Nonzero if the current command is modified by "server ". This
134 affects things like recording into the command history, commands
135 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
136 whatever) can issue its own commands and also send along commands
137 from the user, and have the user not notice that the user interface
138 is issuing commands too. */
141 /* Timeout limit for response from target. */
143 /* The default value has been changed many times over the years. It
144 was originally 5 seconds. But that was thought to be a long time
145 to sit and wait, so it was changed to 2 seconds. That was thought
146 to be plenty unless the connection was going through some terminal
147 server or multiplexer or other form of hairy serial connection.
149 In mid-1996, remote_timeout was moved from remote.c to top.c and
150 it began being used in other remote-* targets. It appears that the
151 default was changed to 20 seconds at that time, perhaps because the
152 Renesas E7000 ICE didn't always respond in a timely manner.
154 But if 5 seconds is a long time to sit and wait for retransmissions,
155 20 seconds is far worse. This demonstrates the difficulty of using
156 a single variable for all protocol timeouts.
158 As remote.c is used much more than remote-e7000.c, it was changed
159 back to 2 seconds in 1999. */
161 int remote_timeout = 2;
163 /* Non-zero tells remote* modules to output debugging info. */
165 int remote_debug = 0;
167 /* Sbrk location on entry to main. Used for statistics only. */
172 /* Hooks for alternate command interfaces. */
174 /* This hook is called from within gdb's many mini-event loops which
175 could steal control from a real user interface's event loop. It
176 returns non-zero if the user is requesting a detach, zero
179 int (*deprecated_ui_loop_hook) (int);
182 /* Called from print_frame_info to list the line we stopped in. */
184 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
188 /* Replaces most of query. */
190 int (*deprecated_query_hook) (const char *, va_list);
192 /* Replaces most of warning. */
194 void (*deprecated_warning_hook) (const char *, va_list);
196 /* These three functions support getting lines of text from the user.
197 They are used in sequence. First deprecated_readline_begin_hook is
198 called with a text string that might be (for example) a message for
199 the user to type in a sequence of commands to be executed at a
200 breakpoint. If this function calls back to a GUI, it might take
201 this opportunity to pop up a text interaction window with this
202 message. Next, deprecated_readline_hook is called with a prompt
203 that is emitted prior to collecting the user input. It can be
204 called multiple times. Finally, deprecated_readline_end_hook is
205 called to notify the GUI that we are done with the interaction
206 window and it can close it. */
208 void (*deprecated_readline_begin_hook) (char *, ...);
209 char *(*deprecated_readline_hook) (const char *);
210 void (*deprecated_readline_end_hook) (void);
212 /* Called as appropriate to notify the interface that we have attached
213 to or detached from an already running process. */
215 void (*deprecated_attach_hook) (void);
216 void (*deprecated_detach_hook) (void);
218 /* Called during long calculations to allow GUI to repair window
219 damage, and to check for stop buttons, etc... */
221 void (*deprecated_interactive_hook) (void);
223 /* Called when going to wait for the target. Usually allows the GUI
224 to run while waiting for target events. */
226 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
227 struct target_waitstatus *status,
230 /* Used by UI as a wrapper around command execution. May do various
231 things like enabling/disabling buttons, etc... */
233 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
234 char *cmd, int from_tty);
236 /* Called when the current thread changes. Argument is thread id. */
238 void (*deprecated_context_hook) (int id);
240 /* Handler for SIGHUP. */
243 /* NOTE 1999-04-29: This function will be static again, once we modify
244 gdb to use the event loop as the default command loop and we merge
245 event-top.c into this file, top.c. */
249 /* Stop asking user for confirmation --- we're exiting. This
250 prevents asking the user dumb questions. */
252 quit_command ((char *) 0, 0);
254 #endif /* defined SIGHUP */
256 /* Line number we are currently in, in a file which is being sourced. */
257 /* NOTE 1999-04-29: This variable will be static again, once we modify
258 gdb to use the event loop as the default command loop and we merge
259 event-top.c into this file, top.c. */
260 /* static */ int source_line_number;
262 /* Name of the file we are sourcing. */
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 */ const char *source_file_name;
268 /* Clean up on error during a "source" command (or execution of a
269 user-defined command). */
272 do_restore_instream_cleanup (void *stream)
274 /* Restore the previous input stream. */
275 instream = (FILE *) stream;
278 /* Read commands from STREAM. */
280 read_command_file (FILE *stream)
282 struct cleanup *cleanups;
284 cleanups = make_cleanup (do_restore_instream_cleanup, instream);
287 do_cleanups (cleanups);
290 void (*pre_init_ui_hook) (void);
294 do_chdir_cleanup (void *old_dir)
302 prepare_execute_command (void)
305 struct cleanup *cleanup;
307 mark = value_mark ();
308 cleanup = make_cleanup_value_free_to_mark (mark);
310 /* With multiple threads running while the one we're examining is
311 stopped, the dcache can get stale without us being able to detect
312 it. For the duration of the command, though, use the dcache to
313 help things like backtrace. */
315 target_dcache_invalidate ();
320 /* Tell the user if the language has changed (except first time) after
321 executing a command. */
324 check_frame_language_change (void)
326 static int warned = 0;
327 struct frame_info *frame;
329 /* First make sure that a new frame has been selected, in case the
330 command or the hooks changed the program state. */
331 frame = deprecated_safe_get_selected_frame ();
332 if (current_language != expected_language)
334 if (language_mode == language_mode_auto && info_verbose)
336 language_info (1); /* Print what changed. */
341 /* Warn the user if the working language does not match the language
342 of the current frame. Only warn the user if we are actually
343 running the program, i.e. there is a stack. */
344 /* FIXME: This should be cacheing the frame and only running when
345 the frame changes. */
347 if (has_stack_frames ())
351 flang = get_frame_language (frame);
353 && flang != language_unknown
354 && flang != current_language->la_language)
356 printf_filtered ("%s\n", lang_frame_mismatch_warn);
365 wait_sync_command_done (void)
367 while (gdb_do_one_event () >= 0)
375 maybe_wait_sync_command_done (int was_sync)
377 /* If the interpreter is in sync mode (we're running a user
378 command's list, running command hooks or similars), and we
379 just ran a synchronous command that started the target, wait
380 for that command to end. */
381 if (!interpreter_async && !was_sync && sync_execution)
382 wait_sync_command_done ();
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;
540 while (instream && !feof (instream))
543 if (instream == stdin)
544 reinitialize_more_filter ();
545 old_chain = make_cleanup (null_cleanup, 0);
547 /* Get a command-line. This calls the readline package. */
548 command = command_line_input (instream == stdin ?
549 get_prompt () : (char *) NULL,
550 instream == stdin, "prompt");
553 do_cleanups (old_chain);
557 make_command_stats_cleanup (1);
559 /* Do not execute commented lines. */
560 if (command[0] != '#')
562 execute_command (command, instream == stdin);
564 /* Do any commands attached to breakpoint we are stopped at. */
565 bpstat_do_actions ();
567 do_cleanups (old_chain);
571 /* When nonzero, cause dont_repeat to do nothing. This should only be
572 set via prevent_dont_repeat. */
574 static int suppress_dont_repeat = 0;
576 /* Commands call this if they do not want to be repeated by null lines. */
581 if (suppress_dont_repeat || server_command)
584 /* If we aren't reading from standard input, we are saving the last
585 thing read from stdin in line and don't want to delete it. Null
586 lines won't repeat here in any case. */
587 if (instream == stdin)
588 *saved_command_line = 0;
591 /* Prevent dont_repeat from working, and return a cleanup that
592 restores the previous state. */
595 prevent_dont_repeat (void)
597 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
599 suppress_dont_repeat = 1;
604 /* Read a line from the stream "instream" without command line editing.
606 It prints PROMPT_ARG once at the start.
607 Action is compatible with "readline", e.g. space for the result is
608 malloc'd and should be freed by the caller.
610 A NULL return means end of file. */
612 gdb_readline (const char *prompt_arg)
617 int result_size = 80;
621 /* Don't use a _filtered function here. It causes the assumed
622 character position to be off, since the newline we read from
623 the user is not accounted for. */
624 fputs_unfiltered (prompt_arg, gdb_stdout);
625 gdb_flush (gdb_stdout);
628 result = (char *) xmalloc (result_size);
632 /* Read from stdin if we are executing a user defined command.
633 This is the right thing for prompt_for_continue, at least. */
634 c = fgetc (instream ? instream : stdin);
639 /* The last line does not end with a newline. Return it, and
640 if we are called again fgetc will still return EOF and
641 we'll return NULL then. */
649 if (input_index > 0 && result[input_index - 1] == '\r')
654 result[input_index++] = c;
655 while (input_index >= result_size)
658 result = (char *) xrealloc (result, result_size);
662 result[input_index++] = '\0';
666 /* Variables which control command line editing and history
667 substitution. These variables are given default values at the end
669 static int command_editing_p;
671 /* NOTE 1999-04-29: This variable will be static again, once we modify
672 gdb to use the event loop as the default command loop and we merge
673 event-top.c into this file, top.c. */
675 /* static */ int history_expansion_p;
677 static int write_history_p;
679 show_write_history_p (struct ui_file *file, int from_tty,
680 struct cmd_list_element *c, const char *value)
682 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
686 /* The variable associated with the "set/show history size"
687 command. The value -1 means unlimited, and -2 means undefined. */
688 static int history_size_setshow_var = -2;
691 show_history_size (struct ui_file *file, int from_tty,
692 struct cmd_list_element *c, const char *value)
694 fprintf_filtered (file, _("The size of the command history is %s.\n"),
698 /* Variable associated with the "history remove-duplicates" option.
699 The value -1 means unlimited. */
700 static int history_remove_duplicates = 0;
703 show_history_remove_duplicates (struct ui_file *file, int from_tty,
704 struct cmd_list_element *c, const char *value)
706 fprintf_filtered (file,
707 _("The number of history entries to look back at for "
708 "duplicates is %s.\n"),
712 static char *history_filename;
714 show_history_filename (struct ui_file *file, int from_tty,
715 struct cmd_list_element *c, const char *value)
717 fprintf_filtered (file, _("The filename in which to record "
718 "the command history is \"%s\".\n"),
722 /* This is like readline(), but it has some gdb-specific behavior.
723 gdb may want readline in both the synchronous and async modes during
724 a single gdb invocation. At the ordinary top-level prompt we might
725 be using the async readline. That means we can't use
726 rl_pre_input_hook, since it doesn't work properly in async mode.
727 However, for a secondary prompt (" >", such as occurs during a
728 `define'), gdb wants a synchronous response.
730 We used to call readline() directly, running it in synchronous
731 mode. But mixing modes this way is not supported, and as of
732 readline 5.x it no longer works; the arrow keys come unbound during
733 the synchronous call. So we make a nested call into the event
734 loop. That's what gdb_readline_wrapper is for. */
736 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
737 rely on gdb_readline_wrapper_result, which might still be NULL if
738 the user types Control-D for EOF. */
739 static int gdb_readline_wrapper_done;
741 /* The result of the current call to gdb_readline_wrapper, once a newline
743 static char *gdb_readline_wrapper_result;
745 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
746 to be called after the newline is processed (which will redisplay
747 the prompt). But in gdb_readline_wrapper we will not get a new
748 prompt until the next call, or until we return to the event loop.
749 So we disable this hook around the newline and restore it before we
751 static void (*saved_after_char_processing_hook) (void);
754 /* The number of nested readline secondary prompts that are currently
757 static int gdb_secondary_prompt_depth = 0;
762 gdb_in_secondary_prompt_p (void)
764 return gdb_secondary_prompt_depth > 0;
768 /* This function is called when readline has seen a complete line of
772 gdb_readline_wrapper_line (char *line)
774 gdb_assert (!gdb_readline_wrapper_done);
775 gdb_readline_wrapper_result = line;
776 gdb_readline_wrapper_done = 1;
778 /* Prevent operate-and-get-next from acting too early. */
779 saved_after_char_processing_hook = after_char_processing_hook;
780 after_char_processing_hook = NULL;
782 /* Prevent parts of the prompt from being redisplayed if annotations
783 are enabled, and readline's state getting out of sync. We'll
784 reinstall the callback handler, which puts the terminal in raw
785 mode (or in readline lingo, in prepped state), when we're next
786 ready to process user input, either in display_gdb_prompt, or if
787 we're handling an asynchronous target event and running in the
788 background, just before returning to the event loop to process
789 further input (or more target events). */
790 if (async_command_editing_p)
791 gdb_rl_callback_handler_remove ();
794 struct gdb_readline_wrapper_cleanup
796 void (*handler_orig) (char *);
797 int already_prompted_orig;
799 /* Whether the target was async. */
800 int target_is_async_orig;
804 gdb_readline_wrapper_cleanup (void *arg)
806 struct gdb_readline_wrapper_cleanup *cleanup
807 = (struct gdb_readline_wrapper_cleanup *) arg;
809 rl_already_prompted = cleanup->already_prompted_orig;
811 gdb_assert (input_handler == gdb_readline_wrapper_line);
812 input_handler = cleanup->handler_orig;
814 /* Don't restore our input handler in readline yet. That would make
815 readline prep the terminal (putting it in raw mode), while the
816 line we just read may trigger execution of a command that expects
817 the terminal in the default cooked/canonical mode, such as e.g.,
818 running Python's interactive online help utility. See
819 gdb_readline_wrapper_line for when we'll reinstall it. */
821 gdb_readline_wrapper_result = NULL;
822 gdb_readline_wrapper_done = 0;
823 gdb_secondary_prompt_depth--;
824 gdb_assert (gdb_secondary_prompt_depth >= 0);
826 after_char_processing_hook = saved_after_char_processing_hook;
827 saved_after_char_processing_hook = NULL;
829 if (cleanup->target_is_async_orig)
836 gdb_readline_wrapper (const char *prompt)
838 struct cleanup *back_to;
839 struct gdb_readline_wrapper_cleanup *cleanup;
842 cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
843 cleanup->handler_orig = input_handler;
844 input_handler = gdb_readline_wrapper_line;
846 cleanup->already_prompted_orig = rl_already_prompted;
848 cleanup->target_is_async_orig = target_is_async_p ();
850 gdb_secondary_prompt_depth++;
851 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
853 if (cleanup->target_is_async_orig)
856 /* Display our prompt and prevent double prompt display. */
857 display_gdb_prompt (prompt);
858 rl_already_prompted = 1;
860 if (after_char_processing_hook)
861 (*after_char_processing_hook) ();
862 gdb_assert (after_char_processing_hook == NULL);
864 while (gdb_do_one_event () >= 0)
865 if (gdb_readline_wrapper_done)
868 retval = gdb_readline_wrapper_result;
869 do_cleanups (back_to);
874 /* The current saved history number from operate-and-get-next.
875 This is -1 if not valid. */
876 static int operate_saved_history = -1;
878 /* This is put on the appropriate hook and helps operate-and-get-next
881 gdb_rl_operate_and_get_next_completion (void)
883 int delta = where_history () - operate_saved_history;
885 /* The `key' argument to rl_get_previous_history is ignored. */
886 rl_get_previous_history (delta, 0);
887 operate_saved_history = -1;
889 /* readline doesn't automatically update the display for us. */
892 after_char_processing_hook = NULL;
893 rl_pre_input_hook = NULL;
896 /* This is a gdb-local readline command handler. It accepts the
897 current command line (like RET does) and, if this command was taken
898 from the history, arranges for the next command in the history to
899 appear on the command line when the prompt returns.
900 We ignore the arguments. */
902 gdb_rl_operate_and_get_next (int count, int key)
906 /* Use the async hook. */
907 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
909 /* Find the current line, and find the next line to use. */
910 where = where_history();
912 if ((history_is_stifled () && (history_length >= history_max_entries))
913 || (where >= history_length - 1))
914 operate_saved_history = where;
916 operate_saved_history = where + 1;
918 return rl_newline (1, key);
921 /* Number of user commands executed during this session. */
923 static int command_count = 0;
925 /* Add the user command COMMAND to the input history list. */
928 gdb_add_history (const char *command)
932 if (history_remove_duplicates != 0)
935 int lookbehind_threshold;
937 /* The lookbehind threshold for finding a duplicate history entry is
938 bounded by command_count because we can't meaningfully delete
939 history entries that are already stored in the history file since
940 the history file is appended to. */
941 if (history_remove_duplicates == -1
942 || history_remove_duplicates > command_count)
943 lookbehind_threshold = command_count;
945 lookbehind_threshold = history_remove_duplicates;
948 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
950 HIST_ENTRY *temp = previous_history ();
955 if (strcmp (temp->line, command) == 0)
957 HIST_ENTRY *prev = remove_history (where_history ());
959 free_history_entry (prev);
966 add_history (command);
969 /* Safely append new history entries to the history file in a corruption-free
970 way using an intermediate local history file. */
973 gdb_safe_append_history (void)
975 int ret, saved_errno;
976 char *local_history_filename;
977 struct cleanup *old_chain;
979 local_history_filename
980 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
981 old_chain = make_cleanup (xfree, local_history_filename);
983 ret = rename (history_filename, local_history_filename);
985 if (ret < 0 && saved_errno != ENOENT)
987 warning (_("Could not rename %s to %s: %s"),
988 history_filename, local_history_filename,
989 safe_strerror (saved_errno));
995 /* If the rename failed with ENOENT then either the global history
996 file never existed in the first place or another GDB process is
997 currently appending to it (and has thus temporarily renamed it).
998 Since we can't distinguish between these two cases, we have to
999 conservatively assume the first case and therefore must write out
1000 (not append) our known history to our local history file and try
1001 to move it back anyway. Otherwise a global history file would
1002 never get created! */
1003 gdb_assert (saved_errno == ENOENT);
1004 write_history (local_history_filename);
1008 append_history (command_count, local_history_filename);
1009 if (history_is_stifled ())
1010 history_truncate_file (local_history_filename, history_max_entries);
1013 ret = rename (local_history_filename, history_filename);
1014 saved_errno = errno;
1015 if (ret < 0 && saved_errno != EEXIST)
1016 warning (_("Could not rename %s to %s: %s"),
1017 local_history_filename, history_filename,
1018 safe_strerror (saved_errno));
1021 do_cleanups (old_chain);
1024 /* Read one line from the command input stream `instream'
1025 into the local static buffer `linebuffer' (whose current length
1027 The buffer is made bigger as necessary.
1028 Returns the address of the start of the line.
1030 NULL is returned for end of file.
1032 *If* the instream == stdin & stdin is a terminal, the line read
1033 is copied into the file line saver (global var char *line,
1034 length linesize) so that it can be duplicated.
1036 This routine either uses fancy command line editing or
1037 simple input as the user has requested. */
1040 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1042 static char *linebuffer = 0;
1043 static unsigned linelength = 0;
1044 const char *prompt = prompt_arg;
1051 /* The annotation suffix must be non-NULL. */
1052 if (annotation_suffix == NULL)
1053 annotation_suffix = "";
1055 if (annotation_level > 1 && instream == stdin)
1060 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1061 + strlen (annotation_suffix) + 40);
1063 local_prompt[0] = '\0';
1065 strcpy (local_prompt, prompt);
1066 strcat (local_prompt, "\n\032\032");
1067 strcat (local_prompt, annotation_suffix);
1068 strcat (local_prompt, "\n");
1070 prompt = local_prompt;
1073 if (linebuffer == 0)
1076 linebuffer = (char *) xmalloc (linelength);
1081 /* Control-C quits instantly if typed while in this loop
1082 since it should not wait until the user types a newline. */
1087 signal (STOP_SIGNAL, handle_stop_sig);
1092 /* Make sure that all output has been output. Some machines may
1093 let you get away with leaving out some of the gdb_flush, but
1096 gdb_flush (gdb_stdout);
1097 gdb_flush (gdb_stderr);
1099 if (source_file_name != NULL)
1100 ++source_line_number;
1102 if (annotation_level > 1 && instream == stdin)
1104 puts_unfiltered ("\n\032\032pre-");
1105 puts_unfiltered (annotation_suffix);
1106 puts_unfiltered ("\n");
1109 /* Don't use fancy stuff if not talking to stdin. */
1110 if (deprecated_readline_hook && input_from_terminal_p ())
1112 rl = (*deprecated_readline_hook) (prompt);
1114 else if (command_editing_p && input_from_terminal_p ())
1116 rl = gdb_readline_wrapper (prompt);
1120 rl = gdb_readline (prompt);
1123 if (annotation_level > 1 && instream == stdin)
1125 puts_unfiltered ("\n\032\032post-");
1126 puts_unfiltered (annotation_suffix);
1127 puts_unfiltered ("\n");
1130 if (!rl || rl == (char *) EOF)
1135 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
1137 linelength = strlen (rl) + 1 + (p - linebuffer);
1138 nline = (char *) xrealloc (linebuffer, linelength);
1139 p += nline - linebuffer;
1143 /* Copy line. Don't copy null at end. (Leaves line alone
1144 if this was just a newline). */
1148 xfree (rl); /* Allocated in readline. */
1150 if (p == linebuffer || *(p - 1) != '\\')
1153 p--; /* Put on top of '\'. */
1159 signal (STOP_SIGNAL, SIG_DFL);
1166 #define SERVER_COMMAND_LENGTH 7
1168 (p - linebuffer > SERVER_COMMAND_LENGTH)
1169 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
1172 /* Note that we don't set `line'. Between this and the check in
1173 dont_repeat, this insures that repeating will still do the
1176 return linebuffer + SERVER_COMMAND_LENGTH;
1179 /* Do history expansion if that is wished. */
1180 if (history_expansion_p && instream == stdin
1181 && ISATTY (instream))
1183 char *history_value;
1186 *p = '\0'; /* Insert null now. */
1187 expanded = history_expand (linebuffer, &history_value);
1190 /* Print the changes. */
1191 printf_unfiltered ("%s\n", history_value);
1193 /* If there was an error, call this function again. */
1196 xfree (history_value);
1197 return command_line_input (prompt, repeat,
1200 if (strlen (history_value) > linelength)
1202 linelength = strlen (history_value) + 1;
1203 linebuffer = (char *) xrealloc (linebuffer, linelength);
1205 strcpy (linebuffer, history_value);
1206 p = linebuffer + strlen (linebuffer);
1208 xfree (history_value);
1211 /* If we just got an empty line, and that is supposed to repeat the
1212 previous command, return the value in the global buffer. */
1213 if (repeat && p == linebuffer)
1214 return saved_command_line;
1215 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
1217 return saved_command_line;
1221 /* Add line to history if appropriate. */
1222 if (*linebuffer && input_from_terminal_p ())
1223 gdb_add_history (linebuffer);
1225 /* Save into global buffer if appropriate. */
1228 if (linelength > saved_command_line_size)
1231 = (char *) xrealloc (saved_command_line, linelength);
1232 saved_command_line_size = linelength;
1234 strcpy (saved_command_line, linebuffer);
1235 return saved_command_line;
1241 /* Print the GDB banner. */
1243 print_gdb_version (struct ui_file *stream)
1245 /* From GNU coding standards, first line is meant to be easy for a
1246 program to parse, and is just canonical program name and version
1247 number, which starts after last space. */
1249 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1251 /* Second line is a copyright notice. */
1253 fprintf_filtered (stream,
1254 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1256 /* Following the copyright is a brief statement that the program is
1257 free software, that users are free to copy and change it on
1258 certain conditions, that it is covered by the GNU GPL, and that
1259 there is no warranty. */
1261 fprintf_filtered (stream, "\
1262 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1263 \nThis is free software: you are free to change and redistribute it.\n\
1264 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1265 and \"show warranty\" for details.\n");
1267 /* After the required info we print the configuration information. */
1269 fprintf_filtered (stream, "This GDB was configured as \"");
1270 if (strcmp (host_name, target_name) != 0)
1272 fprintf_filtered (stream, "--host=%s --target=%s",
1273 host_name, target_name);
1277 fprintf_filtered (stream, "%s", host_name);
1279 fprintf_filtered (stream, "\".\n\
1280 Type \"show configuration\" for configuration details.");
1282 if (REPORT_BUGS_TO[0])
1284 fprintf_filtered (stream,
1285 _("\nFor bug reporting instructions, please see:\n"));
1286 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1288 fprintf_filtered (stream,
1289 _("Find the GDB manual and other documentation \
1290 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1291 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1292 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1293 commands related to \"word\"."));
1296 /* Print the details of GDB build-time configuration. */
1298 print_gdb_configuration (struct ui_file *stream)
1300 fprintf_filtered (stream, _("\
1301 This GDB was configured as follows:\n\
1302 configure --host=%s --target=%s\n\
1303 "), host_name, target_name);
1304 fprintf_filtered (stream, _("\
1305 --with-auto-load-dir=%s\n\
1306 --with-auto-load-safe-path=%s\n\
1307 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1309 fprintf_filtered (stream, _("\
1313 fprintf_filtered (stream, _("\
1318 fprintf_filtered (stream, _("\
1319 --with-gdb-datadir=%s%s\n\
1320 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1322 fprintf_filtered (stream, _("\
1323 --with-iconv-bin=%s%s\n\
1324 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1326 if (JIT_READER_DIR[0])
1327 fprintf_filtered (stream, _("\
1328 --with-jit-reader-dir=%s%s\n\
1329 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1330 #if HAVE_LIBUNWIND_IA64_H
1331 fprintf_filtered (stream, _("\
1332 --with-libunwind-ia64\n\
1335 fprintf_filtered (stream, _("\
1336 --without-libunwind-ia64\n\
1340 fprintf_filtered (stream, _("\
1344 fprintf_filtered (stream, _("\
1348 #ifdef WITH_PYTHON_PATH
1349 fprintf_filtered (stream, _("\
1350 --with-python=%s%s\n\
1351 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1354 fprintf_filtered (stream, _("\
1358 fprintf_filtered (stream, _("\
1363 fprintf_filtered (stream, _("\
1364 --with-relocated-sources=%s\n\
1368 fprintf_filtered (stream, _("\
1369 --with-separate-debug-dir=%s%s\n\
1370 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1371 if (TARGET_SYSTEM_ROOT[0])
1372 fprintf_filtered (stream, _("\
1373 --with-sysroot=%s%s\n\
1374 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1375 if (SYSTEM_GDBINIT[0])
1376 fprintf_filtered (stream, _("\
1377 --with-system-gdbinit=%s%s\n\
1378 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1379 #if HAVE_LIBBABELTRACE
1380 fprintf_filtered (stream, _("\
1381 --with-babeltrace\n\
1384 fprintf_filtered (stream, _("\
1385 --without-babeltrace\n\
1388 /* We assume "relocatable" will be printed at least once, thus we always
1389 print this text. It's a reasonably safe assumption for now. */
1390 fprintf_filtered (stream, _("\n\
1391 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1392 tree, and GDB will still find it.)\n\
1397 /* The current top level prompt, settable with "set prompt", and/or
1398 with the python `gdb.prompt_hook' hook. */
1399 static char *top_prompt;
1401 /* Access method for the GDB prompt string. */
1409 /* Set method for the GDB prompt string. */
1412 set_prompt (const char *s)
1414 char *p = xstrdup (s);
1427 /* Callback for iterate_over_inferiors. Kills or detaches the given
1428 inferior, depending on how we originally gained control of it. */
1431 kill_or_detach (struct inferior *inf, void *args)
1433 struct qt_args *qt = (struct qt_args *) args;
1434 struct thread_info *thread;
1439 thread = any_thread_of_process (inf->pid);
1442 switch_to_thread (thread->ptid);
1444 /* Leave core files alone. */
1445 if (target_has_execution)
1447 if (inf->attach_flag)
1448 target_detach (qt->args, qt->from_tty);
1457 /* Callback for iterate_over_inferiors. Prints info about what GDB
1458 will do to each inferior on a "quit". ARG points to a struct
1459 ui_out where output is to be collected. */
1462 print_inferior_quit_action (struct inferior *inf, void *arg)
1464 struct ui_file *stb = (struct ui_file *) arg;
1469 if (inf->attach_flag)
1470 fprintf_filtered (stb,
1471 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1472 target_pid_to_str (pid_to_ptid (inf->pid)));
1474 fprintf_filtered (stb,
1475 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1476 target_pid_to_str (pid_to_ptid (inf->pid)));
1481 /* If necessary, make the user confirm that we should quit. Return
1482 non-zero if we should quit, zero if we shouldn't. */
1487 struct ui_file *stb;
1488 struct cleanup *old_chain;
1492 /* Don't even ask if we're only debugging a core file inferior. */
1493 if (!have_live_inferiors ())
1496 /* Build the query string as a single string. */
1497 stb = mem_fileopen ();
1498 old_chain = make_cleanup_ui_file_delete (stb);
1500 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1501 iterate_over_inferiors (print_inferior_quit_action, stb);
1502 fprintf_filtered (stb, _("\nQuit anyway? "));
1504 str = ui_file_xstrdup (stb, NULL);
1505 make_cleanup (xfree, str);
1507 qr = query ("%s", str);
1508 do_cleanups (old_chain);
1512 /* Prepare to exit GDB cleanly by undoing any changes made to the
1513 terminal so that we leave the terminal in the state we acquired it. */
1516 undo_terminal_modifications_before_exit (void)
1518 target_terminal_ours ();
1522 if (async_command_editing_p)
1523 gdb_disable_readline ();
1527 /* Quit without asking for confirmation. */
1530 quit_force (char *args, int from_tty)
1535 undo_terminal_modifications_before_exit ();
1537 /* An optional expression may be used to cause gdb to terminate with the
1538 value of that expression. */
1541 struct value *val = parse_and_eval (args);
1543 exit_code = (int) value_as_long (val);
1545 else if (return_child_result)
1546 exit_code = return_child_result_value;
1549 qt.from_tty = from_tty;
1551 /* We want to handle any quit errors and exit regardless. */
1553 /* Get out of tfind mode, and kill or detach all inferiors. */
1556 disconnect_tracing ();
1557 iterate_over_inferiors (kill_or_detach, &qt);
1559 CATCH (ex, RETURN_MASK_ALL)
1561 exception_print (gdb_stderr, ex);
1565 /* Give all pushed targets a chance to do minimal cleanup, and pop
1571 CATCH (ex, RETURN_MASK_ALL)
1573 exception_print (gdb_stderr, ex);
1577 /* Save the history information if it is appropriate to do so. */
1580 if (write_history_p && history_filename
1581 && input_from_terminal_p ())
1582 gdb_safe_append_history ();
1584 CATCH (ex, RETURN_MASK_ALL)
1586 exception_print (gdb_stderr, ex);
1590 /* Do any final cleanups before exiting. */
1593 do_final_cleanups (all_cleanups ());
1595 CATCH (ex, RETURN_MASK_ALL)
1597 exception_print (gdb_stderr, ex);
1604 /* Returns whether GDB is running on a terminal and input is
1605 currently coming from that terminal. */
1608 input_from_terminal_p (void)
1613 if (gdb_has_a_terminal () && instream == stdin)
1616 /* If INSTREAM is unset, and we are not in a user command, we
1617 must be in Insight. That's like having a terminal, for our
1619 if (instream == NULL && !in_user_command)
1626 dont_repeat_command (char *ignored, int from_tty)
1628 /* Can't call dont_repeat here because we're not necessarily reading
1630 *saved_command_line = 0;
1633 /* Functions to manipulate command line editing control variables. */
1635 /* Number of commands to print in each call to show_commands. */
1636 #define Hist_print 10
1638 show_commands (char *args, int from_tty)
1640 /* Index for history commands. Relative to history_base. */
1643 /* Number of the history entry which we are planning to display next.
1644 Relative to history_base. */
1647 /* Print out some of the commands from the command history. */
1651 if (args[0] == '+' && args[1] == '\0')
1652 /* "info editing +" should print from the stored position. */
1655 /* "info editing <exp>" should print around command number <exp>. */
1656 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1658 /* "show commands" means print the last Hist_print commands. */
1661 num = history_length - Hist_print;
1667 /* If there are at least Hist_print commands, we want to display the last
1668 Hist_print rather than, say, the last 6. */
1669 if (history_length - num < Hist_print)
1671 num = history_length - Hist_print;
1677 offset < num + Hist_print && offset < history_length;
1680 printf_filtered ("%5d %s\n", history_base + offset,
1681 (history_get (history_base + offset))->line);
1684 /* The next command we want to display is the next one that we haven't
1688 /* If the user repeats this command with return, it should do what
1689 "show commands +" does. This is unnecessary if arg is null,
1690 because "show commands +" is not useful after "show commands". */
1691 if (from_tty && args)
1698 /* Update the size of our command history file to HISTORY_SIZE.
1700 A HISTORY_SIZE of -1 stands for unlimited. */
1703 set_readline_history_size (int history_size)
1705 gdb_assert (history_size >= -1);
1707 if (history_size == -1)
1708 unstifle_history ();
1710 stifle_history (history_size);
1713 /* Called by do_setshow_command. */
1715 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1717 set_readline_history_size (history_size_setshow_var);
1721 set_history (char *args, int from_tty)
1723 printf_unfiltered (_("\"set history\" must be followed "
1724 "by the name of a history subcommand.\n"));
1725 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1729 show_history (char *args, int from_tty)
1731 cmd_show_list (showhistlist, from_tty, "");
1734 int info_verbose = 0; /* Default verbose msgs off. */
1736 /* Called by do_setshow_command. An elaborate joke. */
1738 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1740 const char *cmdname = "verbose";
1741 struct cmd_list_element *showcmd;
1743 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1744 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1748 c->doc = "Set verbose printing of informational messages.";
1749 showcmd->doc = "Show verbose printing of informational messages.";
1753 c->doc = "Set verbosity.";
1754 showcmd->doc = "Show verbosity.";
1758 /* Init the history buffer. Note that we are called after the init file(s)
1759 have been read so that the user can change the history file via his
1760 .gdbinit file (for instance). The GDBHISTFILE environment variable
1761 overrides all of this. */
1768 tmpenv = getenv ("GDBHISTSIZE");
1775 tmpenv = skip_spaces (tmpenv);
1777 var = strtol (tmpenv, &endptr, 10);
1778 saved_errno = errno;
1779 endptr = skip_spaces (endptr);
1781 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1782 empty string, a negative number or a huge positive number (larger than
1783 INT_MAX) then set the history size to unlimited. Otherwise set our
1784 history size to the number we have read. This behavior is consistent
1785 with how bash handles HISTSIZE. */
1786 if (*endptr != '\0')
1788 else if (*tmpenv == '\0'
1791 /* On targets where INT_MAX == LONG_MAX, we have to look at
1792 errno after calling strtol to distinguish between a value that
1793 is exactly INT_MAX and an overflowing value that was clamped
1795 || (var == INT_MAX && saved_errno == ERANGE))
1796 history_size_setshow_var = -1;
1798 history_size_setshow_var = var;
1801 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1803 if (history_size_setshow_var == -2)
1804 history_size_setshow_var = 256;
1806 set_readline_history_size (history_size_setshow_var);
1808 tmpenv = getenv ("GDBHISTFILE");
1810 history_filename = xstrdup (tmpenv);
1811 else if (!history_filename)
1813 /* We include the current directory so that if the user changes
1814 directories the file written will be the same as the one
1817 /* No leading dots in file names are allowed on MSDOS. */
1818 history_filename = concat (current_directory, "/_gdb_history",
1821 history_filename = concat (current_directory, "/.gdb_history",
1825 read_history (history_filename);
1829 show_prompt (struct ui_file *file, int from_tty,
1830 struct cmd_list_element *c, const char *value)
1832 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1836 show_async_command_editing_p (struct ui_file *file, int from_tty,
1837 struct cmd_list_element *c, const char *value)
1839 fprintf_filtered (file, _("Editing of command lines as "
1840 "they are typed is %s.\n"),
1845 show_annotation_level (struct ui_file *file, int from_tty,
1846 struct cmd_list_element *c, const char *value)
1848 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1852 show_exec_done_display_p (struct ui_file *file, int from_tty,
1853 struct cmd_list_element *c, const char *value)
1855 fprintf_filtered (file, _("Notification of completion for "
1856 "asynchronous execution commands is %s.\n"),
1860 /* New values of the "data-directory" parameter are staged here. */
1861 static char *staged_gdb_datadir;
1863 /* "set" command for the gdb_datadir configuration variable. */
1866 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1868 set_gdb_data_directory (staged_gdb_datadir);
1869 observer_notify_gdb_datadir_changed ();
1872 /* "show" command for the gdb_datadir configuration variable. */
1875 show_gdb_datadir (struct ui_file *file, int from_tty,
1876 struct cmd_list_element *c, const char *value)
1878 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1883 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1885 /* We include the current directory so that if the user changes
1886 directories the file written will be the same as the one
1888 if (!IS_ABSOLUTE_PATH (history_filename))
1889 history_filename = reconcat (history_filename, current_directory, "/",
1890 history_filename, (char *) NULL);
1896 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1897 the DEFAULT_PROMPT is. */
1898 set_prompt (DEFAULT_PROMPT);
1900 /* Set the important stuff up for command editing. */
1901 command_editing_p = 1;
1902 history_expansion_p = 0;
1903 write_history_p = 0;
1905 /* Setup important stuff for command line editing. */
1906 rl_completion_word_break_hook = gdb_completion_word_break_characters;
1907 rl_completion_entry_function = readline_line_completion_function;
1908 rl_completer_word_break_characters = default_word_break_characters ();
1909 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1910 rl_completion_display_matches_hook = cli_display_match_list;
1911 rl_readline_name = "gdb";
1912 rl_terminal_name = getenv ("TERM");
1914 /* The name for this defun comes from Bash, where it originated.
1915 15 is Control-o, the same binding this function has in Bash. */
1916 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1918 add_setshow_string_cmd ("prompt", class_support,
1920 _("Set gdb's prompt"),
1921 _("Show gdb's prompt"),
1924 &setlist, &showlist);
1926 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1927 Don't repeat this command.\nPrimarily \
1928 used inside of user-defined commands that should not be repeated when\n\
1931 add_setshow_boolean_cmd ("editing", class_support,
1932 &async_command_editing_p, _("\
1933 Set editing of command lines as they are typed."), _("\
1934 Show editing of command lines as they are typed."), _("\
1935 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1936 Without an argument, command line editing is enabled. To edit, use\n\
1937 EMACS-like or VI-like commands like control-P or ESC."),
1938 set_async_editing_command,
1939 show_async_command_editing_p,
1940 &setlist, &showlist);
1942 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1943 Set saving of the history record on exit."), _("\
1944 Show saving of the history record on exit."), _("\
1945 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1946 Without an argument, saving is enabled."),
1948 show_write_history_p,
1949 &sethistlist, &showhistlist);
1951 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
1952 &history_size_setshow_var, _("\
1953 Set the size of the command history,"), _("\
1954 Show the size of the command history,"), _("\
1955 ie. the number of previous commands to keep a record of.\n\
1956 If set to \"unlimited\", the number of commands kept in the history\n\
1957 list is unlimited. This defaults to the value of the environment\n\
1958 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1959 set_history_size_command,
1961 &sethistlist, &showhistlist);
1963 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
1964 &history_remove_duplicates, _("\
1965 Set how far back in history to look for and remove duplicate entries."), _("\
1966 Show how far back in history to look for and remove duplicate entries."), _("\
1967 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1968 and remove the first history entry that is a duplicate of the most recent\n\
1969 entry, each time a new history entry is added.\n\
1970 If set to \"unlimited\", this lookbehind is unbounded.\n\
1971 Only history entries added during this session are considered for removal.\n\
1972 If set to 0, removal of duplicate history entries is disabled.\n\
1973 By default this option is set to 0."),
1975 show_history_remove_duplicates,
1976 &sethistlist, &showhistlist);
1978 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1979 Set the filename in which to record the command history"), _("\
1980 Show the filename in which to record the command history"), _("\
1981 (the list of previous commands of which a record is kept)."),
1982 set_history_filename,
1983 show_history_filename,
1984 &sethistlist, &showhistlist);
1986 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
1987 Set whether to confirm potentially dangerous operations."), _("\
1988 Show whether to confirm potentially dangerous operations."), NULL,
1991 &setlist, &showlist);
1993 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1994 Set annotation_level."), _("\
1995 Show annotation_level."), _("\
1996 0 == normal; 1 == fullname (for use when running under emacs)\n\
1997 2 == output annotated suitably for use by programs that control GDB."),
1999 show_annotation_level,
2000 &setlist, &showlist);
2002 add_setshow_boolean_cmd ("exec-done-display", class_support,
2003 &exec_done_display_p, _("\
2004 Set notification of completion for asynchronous execution commands."), _("\
2005 Show notification of completion for asynchronous execution commands."), _("\
2006 Use \"on\" to enable the notification, and \"off\" to disable it."),
2008 show_exec_done_display_p,
2009 &setlist, &showlist);
2011 add_setshow_filename_cmd ("data-directory", class_maintenance,
2012 &staged_gdb_datadir, _("Set GDB's data directory."),
2013 _("Show GDB's data directory."),
2015 When set, GDB uses the specified path to search for data files."),
2016 set_gdb_datadir, show_gdb_datadir,
2022 gdb_init (char *argv0)
2024 if (pre_init_ui_hook)
2025 pre_init_ui_hook ();
2027 /* Run the init function of each source file. */
2030 /* Make sure we return to the original directory upon exit, come
2031 what may, since the OS doesn't do that for us. */
2032 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2035 init_cmd_lists (); /* This needs to be done first. */
2036 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2037 initialize_utils (); /* Make errors and warnings possible. */
2041 /* Here is where we call all the _initialize_foo routines. */
2042 initialize_all_files ();
2044 /* This creates the current_program_space. Do this after all the
2045 _initialize_foo routines have had a chance to install their
2046 per-sspace data keys. Also do this before
2047 initialize_current_architecture is called, because it accesses
2048 exec_bfd of the current program space. */
2049 initialize_progspace ();
2050 initialize_inferiors ();
2051 initialize_current_architecture ();
2053 init_main (); /* But that omits this file! Do it now. */
2055 initialize_stdin_serial ();
2057 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2059 set_initial_gdb_ttystate ();
2061 async_init_signals ();
2063 /* We need a default language for parsing expressions, so simple
2064 things like "set width 0" won't fail if no language is explicitly
2065 set in a config file or implicitly set by reading an executable
2067 set_language (language_c);
2068 expected_language = current_language; /* Don't warn about the change. */
2070 /* Python initialization, for example, can require various commands to be
2071 installed. For example "info pretty-printer" needs the "info"
2072 prefix to be installed. Keep things simple and just do final
2073 script initialization here. */
2074 finish_ext_lang_initialization ();