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. */
613 gdb_readline_no_editing (const char *prompt_arg)
618 int result_size = 80;
622 /* Don't use a _filtered function here. It causes the assumed
623 character position to be off, since the newline we read from
624 the user is not accounted for. */
625 fputs_unfiltered (prompt_arg, gdb_stdout);
626 gdb_flush (gdb_stdout);
629 result = (char *) xmalloc (result_size);
633 /* Read from stdin if we are executing a user defined command.
634 This is the right thing for prompt_for_continue, at least. */
635 c = fgetc (instream ? instream : stdin);
640 /* The last line does not end with a newline. Return it, and
641 if we are called again fgetc will still return EOF and
642 we'll return NULL then. */
650 if (input_index > 0 && result[input_index - 1] == '\r')
655 result[input_index++] = c;
656 while (input_index >= result_size)
659 result = (char *) xrealloc (result, result_size);
663 result[input_index++] = '\0';
667 /* Variables which control command line editing and history
668 substitution. These variables are given default values at the end
670 static int command_editing_p;
672 /* NOTE 1999-04-29: This variable will be static again, once we modify
673 gdb to use the event loop as the default command loop and we merge
674 event-top.c into this file, top.c. */
676 /* static */ int history_expansion_p;
678 static int write_history_p;
680 show_write_history_p (struct ui_file *file, int from_tty,
681 struct cmd_list_element *c, const char *value)
683 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
687 /* The variable associated with the "set/show history size"
688 command. The value -1 means unlimited, and -2 means undefined. */
689 static int history_size_setshow_var = -2;
692 show_history_size (struct ui_file *file, int from_tty,
693 struct cmd_list_element *c, const char *value)
695 fprintf_filtered (file, _("The size of the command history is %s.\n"),
699 /* Variable associated with the "history remove-duplicates" option.
700 The value -1 means unlimited. */
701 static int history_remove_duplicates = 0;
704 show_history_remove_duplicates (struct ui_file *file, int from_tty,
705 struct cmd_list_element *c, const char *value)
707 fprintf_filtered (file,
708 _("The number of history entries to look back at for "
709 "duplicates is %s.\n"),
713 static char *history_filename;
715 show_history_filename (struct ui_file *file, int from_tty,
716 struct cmd_list_element *c, const char *value)
718 fprintf_filtered (file, _("The filename in which to record "
719 "the command history is \"%s\".\n"),
723 /* This is like readline(), but it has some gdb-specific behavior.
724 gdb may want readline in both the synchronous and async modes during
725 a single gdb invocation. At the ordinary top-level prompt we might
726 be using the async readline. That means we can't use
727 rl_pre_input_hook, since it doesn't work properly in async mode.
728 However, for a secondary prompt (" >", such as occurs during a
729 `define'), gdb wants a synchronous response.
731 We used to call readline() directly, running it in synchronous
732 mode. But mixing modes this way is not supported, and as of
733 readline 5.x it no longer works; the arrow keys come unbound during
734 the synchronous call. So we make a nested call into the event
735 loop. That's what gdb_readline_wrapper is for. */
737 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
738 rely on gdb_readline_wrapper_result, which might still be NULL if
739 the user types Control-D for EOF. */
740 static int gdb_readline_wrapper_done;
742 /* The result of the current call to gdb_readline_wrapper, once a newline
744 static char *gdb_readline_wrapper_result;
746 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
747 to be called after the newline is processed (which will redisplay
748 the prompt). But in gdb_readline_wrapper we will not get a new
749 prompt until the next call, or until we return to the event loop.
750 So we disable this hook around the newline and restore it before we
752 static void (*saved_after_char_processing_hook) (void);
755 /* The number of nested readline secondary prompts that are currently
758 static int gdb_secondary_prompt_depth = 0;
763 gdb_in_secondary_prompt_p (void)
765 return gdb_secondary_prompt_depth > 0;
769 /* This function is called when readline has seen a complete line of
773 gdb_readline_wrapper_line (char *line)
775 gdb_assert (!gdb_readline_wrapper_done);
776 gdb_readline_wrapper_result = line;
777 gdb_readline_wrapper_done = 1;
779 /* Prevent operate-and-get-next from acting too early. */
780 saved_after_char_processing_hook = after_char_processing_hook;
781 after_char_processing_hook = NULL;
783 /* Prevent parts of the prompt from being redisplayed if annotations
784 are enabled, and readline's state getting out of sync. We'll
785 reinstall the callback handler, which puts the terminal in raw
786 mode (or in readline lingo, in prepped state), when we're next
787 ready to process user input, either in display_gdb_prompt, or if
788 we're handling an asynchronous target event and running in the
789 background, just before returning to the event loop to process
790 further input (or more target events). */
791 if (async_command_editing_p)
792 gdb_rl_callback_handler_remove ();
795 struct gdb_readline_wrapper_cleanup
797 void (*handler_orig) (char *);
798 int already_prompted_orig;
800 /* Whether the target was async. */
801 int target_is_async_orig;
805 gdb_readline_wrapper_cleanup (void *arg)
807 struct gdb_readline_wrapper_cleanup *cleanup
808 = (struct gdb_readline_wrapper_cleanup *) arg;
810 rl_already_prompted = cleanup->already_prompted_orig;
812 gdb_assert (input_handler == gdb_readline_wrapper_line);
813 input_handler = cleanup->handler_orig;
815 /* Don't restore our input handler in readline yet. That would make
816 readline prep the terminal (putting it in raw mode), while the
817 line we just read may trigger execution of a command that expects
818 the terminal in the default cooked/canonical mode, such as e.g.,
819 running Python's interactive online help utility. See
820 gdb_readline_wrapper_line for when we'll reinstall it. */
822 gdb_readline_wrapper_result = NULL;
823 gdb_readline_wrapper_done = 0;
824 gdb_secondary_prompt_depth--;
825 gdb_assert (gdb_secondary_prompt_depth >= 0);
827 after_char_processing_hook = saved_after_char_processing_hook;
828 saved_after_char_processing_hook = NULL;
830 if (cleanup->target_is_async_orig)
837 gdb_readline_wrapper (const char *prompt)
839 struct cleanup *back_to;
840 struct gdb_readline_wrapper_cleanup *cleanup;
843 cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
844 cleanup->handler_orig = input_handler;
845 input_handler = gdb_readline_wrapper_line;
847 cleanup->already_prompted_orig = rl_already_prompted;
849 cleanup->target_is_async_orig = target_is_async_p ();
851 gdb_secondary_prompt_depth++;
852 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
854 if (cleanup->target_is_async_orig)
857 /* Display our prompt and prevent double prompt display. */
858 display_gdb_prompt (prompt);
859 rl_already_prompted = 1;
861 if (after_char_processing_hook)
862 (*after_char_processing_hook) ();
863 gdb_assert (after_char_processing_hook == NULL);
865 while (gdb_do_one_event () >= 0)
866 if (gdb_readline_wrapper_done)
869 retval = gdb_readline_wrapper_result;
870 do_cleanups (back_to);
875 /* The current saved history number from operate-and-get-next.
876 This is -1 if not valid. */
877 static int operate_saved_history = -1;
879 /* This is put on the appropriate hook and helps operate-and-get-next
882 gdb_rl_operate_and_get_next_completion (void)
884 int delta = where_history () - operate_saved_history;
886 /* The `key' argument to rl_get_previous_history is ignored. */
887 rl_get_previous_history (delta, 0);
888 operate_saved_history = -1;
890 /* readline doesn't automatically update the display for us. */
893 after_char_processing_hook = NULL;
894 rl_pre_input_hook = NULL;
897 /* This is a gdb-local readline command handler. It accepts the
898 current command line (like RET does) and, if this command was taken
899 from the history, arranges for the next command in the history to
900 appear on the command line when the prompt returns.
901 We ignore the arguments. */
903 gdb_rl_operate_and_get_next (int count, int key)
907 /* Use the async hook. */
908 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
910 /* Find the current line, and find the next line to use. */
911 where = where_history();
913 if ((history_is_stifled () && (history_length >= history_max_entries))
914 || (where >= history_length - 1))
915 operate_saved_history = where;
917 operate_saved_history = where + 1;
919 return rl_newline (1, key);
922 /* Number of user commands executed during this session. */
924 static int command_count = 0;
926 /* Add the user command COMMAND to the input history list. */
929 gdb_add_history (const char *command)
933 if (history_remove_duplicates != 0)
936 int lookbehind_threshold;
938 /* The lookbehind threshold for finding a duplicate history entry is
939 bounded by command_count because we can't meaningfully delete
940 history entries that are already stored in the history file since
941 the history file is appended to. */
942 if (history_remove_duplicates == -1
943 || history_remove_duplicates > command_count)
944 lookbehind_threshold = command_count;
946 lookbehind_threshold = history_remove_duplicates;
949 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
951 HIST_ENTRY *temp = previous_history ();
956 if (strcmp (temp->line, command) == 0)
958 HIST_ENTRY *prev = remove_history (where_history ());
960 free_history_entry (prev);
967 add_history (command);
970 /* Safely append new history entries to the history file in a corruption-free
971 way using an intermediate local history file. */
974 gdb_safe_append_history (void)
976 int ret, saved_errno;
977 char *local_history_filename;
978 struct cleanup *old_chain;
980 local_history_filename
981 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
982 old_chain = make_cleanup (xfree, local_history_filename);
984 ret = rename (history_filename, local_history_filename);
986 if (ret < 0 && saved_errno != ENOENT)
988 warning (_("Could not rename %s to %s: %s"),
989 history_filename, local_history_filename,
990 safe_strerror (saved_errno));
996 /* If the rename failed with ENOENT then either the global history
997 file never existed in the first place or another GDB process is
998 currently appending to it (and has thus temporarily renamed it).
999 Since we can't distinguish between these two cases, we have to
1000 conservatively assume the first case and therefore must write out
1001 (not append) our known history to our local history file and try
1002 to move it back anyway. Otherwise a global history file would
1003 never get created! */
1004 gdb_assert (saved_errno == ENOENT);
1005 write_history (local_history_filename);
1009 append_history (command_count, local_history_filename);
1010 if (history_is_stifled ())
1011 history_truncate_file (local_history_filename, history_max_entries);
1014 ret = rename (local_history_filename, history_filename);
1015 saved_errno = errno;
1016 if (ret < 0 && saved_errno != EEXIST)
1017 warning (_("Could not rename %s to %s: %s"),
1018 local_history_filename, history_filename,
1019 safe_strerror (saved_errno));
1022 do_cleanups (old_chain);
1025 /* Read one line from the command input stream `instream'
1026 into the local static buffer `linebuffer' (whose current length
1028 The buffer is made bigger as necessary.
1029 Returns the address of the start of the line.
1031 NULL is returned for end of file.
1033 *If* the instream == stdin & stdin is a terminal, the line read
1034 is copied into the file line saver (global var char *line,
1035 length linesize) so that it can be duplicated.
1037 This routine either uses fancy command line editing or
1038 simple input as the user has requested. */
1041 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1043 static char *linebuffer = 0;
1044 static unsigned linelength = 0;
1045 const char *prompt = prompt_arg;
1052 /* The annotation suffix must be non-NULL. */
1053 if (annotation_suffix == NULL)
1054 annotation_suffix = "";
1056 if (annotation_level > 1 && instream == stdin)
1061 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1062 + strlen (annotation_suffix) + 40);
1064 local_prompt[0] = '\0';
1066 strcpy (local_prompt, prompt);
1067 strcat (local_prompt, "\n\032\032");
1068 strcat (local_prompt, annotation_suffix);
1069 strcat (local_prompt, "\n");
1071 prompt = local_prompt;
1074 if (linebuffer == 0)
1077 linebuffer = (char *) xmalloc (linelength);
1082 /* Control-C quits instantly if typed while in this loop
1083 since it should not wait until the user types a newline. */
1088 signal (STOP_SIGNAL, handle_stop_sig);
1093 /* Make sure that all output has been output. Some machines may
1094 let you get away with leaving out some of the gdb_flush, but
1097 gdb_flush (gdb_stdout);
1098 gdb_flush (gdb_stderr);
1100 if (source_file_name != NULL)
1101 ++source_line_number;
1103 if (annotation_level > 1 && instream == stdin)
1105 puts_unfiltered ("\n\032\032pre-");
1106 puts_unfiltered (annotation_suffix);
1107 puts_unfiltered ("\n");
1110 /* Don't use fancy stuff if not talking to stdin. */
1111 if (deprecated_readline_hook && input_from_terminal_p ())
1113 rl = (*deprecated_readline_hook) (prompt);
1115 else if (command_editing_p && input_from_terminal_p ())
1117 rl = gdb_readline_wrapper (prompt);
1121 rl = gdb_readline_no_editing (prompt);
1124 if (annotation_level > 1 && instream == stdin)
1126 puts_unfiltered ("\n\032\032post-");
1127 puts_unfiltered (annotation_suffix);
1128 puts_unfiltered ("\n");
1131 if (!rl || rl == (char *) EOF)
1136 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
1138 linelength = strlen (rl) + 1 + (p - linebuffer);
1139 nline = (char *) xrealloc (linebuffer, linelength);
1140 p += nline - linebuffer;
1144 /* Copy line. Don't copy null at end. (Leaves line alone
1145 if this was just a newline). */
1149 xfree (rl); /* Allocated in readline. */
1151 if (p == linebuffer || *(p - 1) != '\\')
1154 p--; /* Put on top of '\'. */
1160 signal (STOP_SIGNAL, SIG_DFL);
1167 #define SERVER_COMMAND_LENGTH 7
1169 (p - linebuffer > SERVER_COMMAND_LENGTH)
1170 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
1173 /* Note that we don't set `line'. Between this and the check in
1174 dont_repeat, this insures that repeating will still do the
1177 return linebuffer + SERVER_COMMAND_LENGTH;
1180 /* Do history expansion if that is wished. */
1181 if (history_expansion_p && instream == stdin
1182 && ISATTY (instream))
1184 char *history_value;
1187 *p = '\0'; /* Insert null now. */
1188 expanded = history_expand (linebuffer, &history_value);
1191 /* Print the changes. */
1192 printf_unfiltered ("%s\n", history_value);
1194 /* If there was an error, call this function again. */
1197 xfree (history_value);
1198 return command_line_input (prompt, repeat,
1201 if (strlen (history_value) > linelength)
1203 linelength = strlen (history_value) + 1;
1204 linebuffer = (char *) xrealloc (linebuffer, linelength);
1206 strcpy (linebuffer, history_value);
1207 p = linebuffer + strlen (linebuffer);
1209 xfree (history_value);
1212 /* If we just got an empty line, and that is supposed to repeat the
1213 previous command, return the value in the global buffer. */
1214 if (repeat && p == linebuffer)
1215 return saved_command_line;
1216 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
1218 return saved_command_line;
1222 /* Add line to history if appropriate. */
1223 if (*linebuffer && input_from_terminal_p ())
1224 gdb_add_history (linebuffer);
1226 /* Save into global buffer if appropriate. */
1229 if (linelength > saved_command_line_size)
1232 = (char *) xrealloc (saved_command_line, linelength);
1233 saved_command_line_size = linelength;
1235 strcpy (saved_command_line, linebuffer);
1236 return saved_command_line;
1242 /* Print the GDB banner. */
1244 print_gdb_version (struct ui_file *stream)
1246 /* From GNU coding standards, first line is meant to be easy for a
1247 program to parse, and is just canonical program name and version
1248 number, which starts after last space. */
1250 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1252 /* Second line is a copyright notice. */
1254 fprintf_filtered (stream,
1255 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1257 /* Following the copyright is a brief statement that the program is
1258 free software, that users are free to copy and change it on
1259 certain conditions, that it is covered by the GNU GPL, and that
1260 there is no warranty. */
1262 fprintf_filtered (stream, "\
1263 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1264 \nThis is free software: you are free to change and redistribute it.\n\
1265 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1266 and \"show warranty\" for details.\n");
1268 /* After the required info we print the configuration information. */
1270 fprintf_filtered (stream, "This GDB was configured as \"");
1271 if (strcmp (host_name, target_name) != 0)
1273 fprintf_filtered (stream, "--host=%s --target=%s",
1274 host_name, target_name);
1278 fprintf_filtered (stream, "%s", host_name);
1280 fprintf_filtered (stream, "\".\n\
1281 Type \"show configuration\" for configuration details.");
1283 if (REPORT_BUGS_TO[0])
1285 fprintf_filtered (stream,
1286 _("\nFor bug reporting instructions, please see:\n"));
1287 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1289 fprintf_filtered (stream,
1290 _("Find the GDB manual and other documentation \
1291 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1292 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1293 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1294 commands related to \"word\"."));
1297 /* Print the details of GDB build-time configuration. */
1299 print_gdb_configuration (struct ui_file *stream)
1301 fprintf_filtered (stream, _("\
1302 This GDB was configured as follows:\n\
1303 configure --host=%s --target=%s\n\
1304 "), host_name, target_name);
1305 fprintf_filtered (stream, _("\
1306 --with-auto-load-dir=%s\n\
1307 --with-auto-load-safe-path=%s\n\
1308 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1310 fprintf_filtered (stream, _("\
1314 fprintf_filtered (stream, _("\
1319 fprintf_filtered (stream, _("\
1320 --with-gdb-datadir=%s%s\n\
1321 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1323 fprintf_filtered (stream, _("\
1324 --with-iconv-bin=%s%s\n\
1325 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1327 if (JIT_READER_DIR[0])
1328 fprintf_filtered (stream, _("\
1329 --with-jit-reader-dir=%s%s\n\
1330 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1331 #if HAVE_LIBUNWIND_IA64_H
1332 fprintf_filtered (stream, _("\
1333 --with-libunwind-ia64\n\
1336 fprintf_filtered (stream, _("\
1337 --without-libunwind-ia64\n\
1341 fprintf_filtered (stream, _("\
1345 fprintf_filtered (stream, _("\
1349 #ifdef WITH_PYTHON_PATH
1350 fprintf_filtered (stream, _("\
1351 --with-python=%s%s\n\
1352 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1355 fprintf_filtered (stream, _("\
1359 fprintf_filtered (stream, _("\
1364 fprintf_filtered (stream, _("\
1365 --with-relocated-sources=%s\n\
1369 fprintf_filtered (stream, _("\
1370 --with-separate-debug-dir=%s%s\n\
1371 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1372 if (TARGET_SYSTEM_ROOT[0])
1373 fprintf_filtered (stream, _("\
1374 --with-sysroot=%s%s\n\
1375 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1376 if (SYSTEM_GDBINIT[0])
1377 fprintf_filtered (stream, _("\
1378 --with-system-gdbinit=%s%s\n\
1379 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1380 #if HAVE_LIBBABELTRACE
1381 fprintf_filtered (stream, _("\
1382 --with-babeltrace\n\
1385 fprintf_filtered (stream, _("\
1386 --without-babeltrace\n\
1389 /* We assume "relocatable" will be printed at least once, thus we always
1390 print this text. It's a reasonably safe assumption for now. */
1391 fprintf_filtered (stream, _("\n\
1392 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1393 tree, and GDB will still find it.)\n\
1398 /* The current top level prompt, settable with "set prompt", and/or
1399 with the python `gdb.prompt_hook' hook. */
1400 static char *top_prompt;
1402 /* Access method for the GDB prompt string. */
1410 /* Set method for the GDB prompt string. */
1413 set_prompt (const char *s)
1415 char *p = xstrdup (s);
1428 /* Callback for iterate_over_inferiors. Kills or detaches the given
1429 inferior, depending on how we originally gained control of it. */
1432 kill_or_detach (struct inferior *inf, void *args)
1434 struct qt_args *qt = (struct qt_args *) args;
1435 struct thread_info *thread;
1440 thread = any_thread_of_process (inf->pid);
1443 switch_to_thread (thread->ptid);
1445 /* Leave core files alone. */
1446 if (target_has_execution)
1448 if (inf->attach_flag)
1449 target_detach (qt->args, qt->from_tty);
1458 /* Callback for iterate_over_inferiors. Prints info about what GDB
1459 will do to each inferior on a "quit". ARG points to a struct
1460 ui_out where output is to be collected. */
1463 print_inferior_quit_action (struct inferior *inf, void *arg)
1465 struct ui_file *stb = (struct ui_file *) arg;
1470 if (inf->attach_flag)
1471 fprintf_filtered (stb,
1472 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1473 target_pid_to_str (pid_to_ptid (inf->pid)));
1475 fprintf_filtered (stb,
1476 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1477 target_pid_to_str (pid_to_ptid (inf->pid)));
1482 /* If necessary, make the user confirm that we should quit. Return
1483 non-zero if we should quit, zero if we shouldn't. */
1488 struct ui_file *stb;
1489 struct cleanup *old_chain;
1493 /* Don't even ask if we're only debugging a core file inferior. */
1494 if (!have_live_inferiors ())
1497 /* Build the query string as a single string. */
1498 stb = mem_fileopen ();
1499 old_chain = make_cleanup_ui_file_delete (stb);
1501 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1502 iterate_over_inferiors (print_inferior_quit_action, stb);
1503 fprintf_filtered (stb, _("\nQuit anyway? "));
1505 str = ui_file_xstrdup (stb, NULL);
1506 make_cleanup (xfree, str);
1508 qr = query ("%s", str);
1509 do_cleanups (old_chain);
1513 /* Prepare to exit GDB cleanly by undoing any changes made to the
1514 terminal so that we leave the terminal in the state we acquired it. */
1517 undo_terminal_modifications_before_exit (void)
1519 target_terminal_ours ();
1523 if (async_command_editing_p)
1524 gdb_disable_readline ();
1528 /* Quit without asking for confirmation. */
1531 quit_force (char *args, int from_tty)
1536 undo_terminal_modifications_before_exit ();
1538 /* An optional expression may be used to cause gdb to terminate with the
1539 value of that expression. */
1542 struct value *val = parse_and_eval (args);
1544 exit_code = (int) value_as_long (val);
1546 else if (return_child_result)
1547 exit_code = return_child_result_value;
1550 qt.from_tty = from_tty;
1552 /* We want to handle any quit errors and exit regardless. */
1554 /* Get out of tfind mode, and kill or detach all inferiors. */
1557 disconnect_tracing ();
1558 iterate_over_inferiors (kill_or_detach, &qt);
1560 CATCH (ex, RETURN_MASK_ALL)
1562 exception_print (gdb_stderr, ex);
1566 /* Give all pushed targets a chance to do minimal cleanup, and pop
1572 CATCH (ex, RETURN_MASK_ALL)
1574 exception_print (gdb_stderr, ex);
1578 /* Save the history information if it is appropriate to do so. */
1581 if (write_history_p && history_filename
1582 && input_from_terminal_p ())
1583 gdb_safe_append_history ();
1585 CATCH (ex, RETURN_MASK_ALL)
1587 exception_print (gdb_stderr, ex);
1591 /* Do any final cleanups before exiting. */
1594 do_final_cleanups (all_cleanups ());
1596 CATCH (ex, RETURN_MASK_ALL)
1598 exception_print (gdb_stderr, ex);
1605 /* Returns whether GDB is running on a terminal and input is
1606 currently coming from that terminal. */
1609 input_from_terminal_p (void)
1614 if (gdb_has_a_terminal () && instream == stdin)
1617 /* If INSTREAM is unset, and we are not in a user command, we
1618 must be in Insight. That's like having a terminal, for our
1620 if (instream == NULL && !in_user_command)
1627 dont_repeat_command (char *ignored, int from_tty)
1629 /* Can't call dont_repeat here because we're not necessarily reading
1631 *saved_command_line = 0;
1634 /* Functions to manipulate command line editing control variables. */
1636 /* Number of commands to print in each call to show_commands. */
1637 #define Hist_print 10
1639 show_commands (char *args, int from_tty)
1641 /* Index for history commands. Relative to history_base. */
1644 /* Number of the history entry which we are planning to display next.
1645 Relative to history_base. */
1648 /* Print out some of the commands from the command history. */
1652 if (args[0] == '+' && args[1] == '\0')
1653 /* "info editing +" should print from the stored position. */
1656 /* "info editing <exp>" should print around command number <exp>. */
1657 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1659 /* "show commands" means print the last Hist_print commands. */
1662 num = history_length - Hist_print;
1668 /* If there are at least Hist_print commands, we want to display the last
1669 Hist_print rather than, say, the last 6. */
1670 if (history_length - num < Hist_print)
1672 num = history_length - Hist_print;
1678 offset < num + Hist_print && offset < history_length;
1681 printf_filtered ("%5d %s\n", history_base + offset,
1682 (history_get (history_base + offset))->line);
1685 /* The next command we want to display is the next one that we haven't
1689 /* If the user repeats this command with return, it should do what
1690 "show commands +" does. This is unnecessary if arg is null,
1691 because "show commands +" is not useful after "show commands". */
1692 if (from_tty && args)
1699 /* Update the size of our command history file to HISTORY_SIZE.
1701 A HISTORY_SIZE of -1 stands for unlimited. */
1704 set_readline_history_size (int history_size)
1706 gdb_assert (history_size >= -1);
1708 if (history_size == -1)
1709 unstifle_history ();
1711 stifle_history (history_size);
1714 /* Called by do_setshow_command. */
1716 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1718 set_readline_history_size (history_size_setshow_var);
1722 set_history (char *args, int from_tty)
1724 printf_unfiltered (_("\"set history\" must be followed "
1725 "by the name of a history subcommand.\n"));
1726 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1730 show_history (char *args, int from_tty)
1732 cmd_show_list (showhistlist, from_tty, "");
1735 int info_verbose = 0; /* Default verbose msgs off. */
1737 /* Called by do_setshow_command. An elaborate joke. */
1739 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1741 const char *cmdname = "verbose";
1742 struct cmd_list_element *showcmd;
1744 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1745 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1749 c->doc = "Set verbose printing of informational messages.";
1750 showcmd->doc = "Show verbose printing of informational messages.";
1754 c->doc = "Set verbosity.";
1755 showcmd->doc = "Show verbosity.";
1759 /* Init the history buffer. Note that we are called after the init file(s)
1760 have been read so that the user can change the history file via his
1761 .gdbinit file (for instance). The GDBHISTFILE environment variable
1762 overrides all of this. */
1769 tmpenv = getenv ("GDBHISTSIZE");
1776 tmpenv = skip_spaces (tmpenv);
1778 var = strtol (tmpenv, &endptr, 10);
1779 saved_errno = errno;
1780 endptr = skip_spaces (endptr);
1782 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1783 empty string, a negative number or a huge positive number (larger than
1784 INT_MAX) then set the history size to unlimited. Otherwise set our
1785 history size to the number we have read. This behavior is consistent
1786 with how bash handles HISTSIZE. */
1787 if (*endptr != '\0')
1789 else if (*tmpenv == '\0'
1792 /* On targets where INT_MAX == LONG_MAX, we have to look at
1793 errno after calling strtol to distinguish between a value that
1794 is exactly INT_MAX and an overflowing value that was clamped
1796 || (var == INT_MAX && saved_errno == ERANGE))
1797 history_size_setshow_var = -1;
1799 history_size_setshow_var = var;
1802 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1804 if (history_size_setshow_var == -2)
1805 history_size_setshow_var = 256;
1807 set_readline_history_size (history_size_setshow_var);
1809 tmpenv = getenv ("GDBHISTFILE");
1811 history_filename = xstrdup (tmpenv);
1812 else if (!history_filename)
1814 /* We include the current directory so that if the user changes
1815 directories the file written will be the same as the one
1818 /* No leading dots in file names are allowed on MSDOS. */
1819 history_filename = concat (current_directory, "/_gdb_history",
1822 history_filename = concat (current_directory, "/.gdb_history",
1826 read_history (history_filename);
1830 show_prompt (struct ui_file *file, int from_tty,
1831 struct cmd_list_element *c, const char *value)
1833 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1837 show_async_command_editing_p (struct ui_file *file, int from_tty,
1838 struct cmd_list_element *c, const char *value)
1840 fprintf_filtered (file, _("Editing of command lines as "
1841 "they are typed is %s.\n"),
1846 show_annotation_level (struct ui_file *file, int from_tty,
1847 struct cmd_list_element *c, const char *value)
1849 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1853 show_exec_done_display_p (struct ui_file *file, int from_tty,
1854 struct cmd_list_element *c, const char *value)
1856 fprintf_filtered (file, _("Notification of completion for "
1857 "asynchronous execution commands is %s.\n"),
1861 /* New values of the "data-directory" parameter are staged here. */
1862 static char *staged_gdb_datadir;
1864 /* "set" command for the gdb_datadir configuration variable. */
1867 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1869 set_gdb_data_directory (staged_gdb_datadir);
1870 observer_notify_gdb_datadir_changed ();
1873 /* "show" command for the gdb_datadir configuration variable. */
1876 show_gdb_datadir (struct ui_file *file, int from_tty,
1877 struct cmd_list_element *c, const char *value)
1879 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1884 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1886 /* We include the current directory so that if the user changes
1887 directories the file written will be the same as the one
1889 if (!IS_ABSOLUTE_PATH (history_filename))
1890 history_filename = reconcat (history_filename, current_directory, "/",
1891 history_filename, (char *) NULL);
1897 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1898 the DEFAULT_PROMPT is. */
1899 set_prompt (DEFAULT_PROMPT);
1901 /* Set the important stuff up for command editing. */
1902 command_editing_p = 1;
1903 history_expansion_p = 0;
1904 write_history_p = 0;
1906 /* Setup important stuff for command line editing. */
1907 rl_completion_word_break_hook = gdb_completion_word_break_characters;
1908 rl_completion_entry_function = readline_line_completion_function;
1909 rl_completer_word_break_characters = default_word_break_characters ();
1910 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1911 rl_completion_display_matches_hook = cli_display_match_list;
1912 rl_readline_name = "gdb";
1913 rl_terminal_name = getenv ("TERM");
1915 /* The name for this defun comes from Bash, where it originated.
1916 15 is Control-o, the same binding this function has in Bash. */
1917 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1919 add_setshow_string_cmd ("prompt", class_support,
1921 _("Set gdb's prompt"),
1922 _("Show gdb's prompt"),
1925 &setlist, &showlist);
1927 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1928 Don't repeat this command.\nPrimarily \
1929 used inside of user-defined commands that should not be repeated when\n\
1932 add_setshow_boolean_cmd ("editing", class_support,
1933 &async_command_editing_p, _("\
1934 Set editing of command lines as they are typed."), _("\
1935 Show editing of command lines as they are typed."), _("\
1936 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1937 Without an argument, command line editing is enabled. To edit, use\n\
1938 EMACS-like or VI-like commands like control-P or ESC."),
1939 set_async_editing_command,
1940 show_async_command_editing_p,
1941 &setlist, &showlist);
1943 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1944 Set saving of the history record on exit."), _("\
1945 Show saving of the history record on exit."), _("\
1946 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1947 Without an argument, saving is enabled."),
1949 show_write_history_p,
1950 &sethistlist, &showhistlist);
1952 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
1953 &history_size_setshow_var, _("\
1954 Set the size of the command history,"), _("\
1955 Show the size of the command history,"), _("\
1956 ie. the number of previous commands to keep a record of.\n\
1957 If set to \"unlimited\", the number of commands kept in the history\n\
1958 list is unlimited. This defaults to the value of the environment\n\
1959 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1960 set_history_size_command,
1962 &sethistlist, &showhistlist);
1964 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
1965 &history_remove_duplicates, _("\
1966 Set how far back in history to look for and remove duplicate entries."), _("\
1967 Show how far back in history to look for and remove duplicate entries."), _("\
1968 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1969 and remove the first history entry that is a duplicate of the most recent\n\
1970 entry, each time a new history entry is added.\n\
1971 If set to \"unlimited\", this lookbehind is unbounded.\n\
1972 Only history entries added during this session are considered for removal.\n\
1973 If set to 0, removal of duplicate history entries is disabled.\n\
1974 By default this option is set to 0."),
1976 show_history_remove_duplicates,
1977 &sethistlist, &showhistlist);
1979 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1980 Set the filename in which to record the command history"), _("\
1981 Show the filename in which to record the command history"), _("\
1982 (the list of previous commands of which a record is kept)."),
1983 set_history_filename,
1984 show_history_filename,
1985 &sethistlist, &showhistlist);
1987 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
1988 Set whether to confirm potentially dangerous operations."), _("\
1989 Show whether to confirm potentially dangerous operations."), NULL,
1992 &setlist, &showlist);
1994 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1995 Set annotation_level."), _("\
1996 Show annotation_level."), _("\
1997 0 == normal; 1 == fullname (for use when running under emacs)\n\
1998 2 == output annotated suitably for use by programs that control GDB."),
2000 show_annotation_level,
2001 &setlist, &showlist);
2003 add_setshow_boolean_cmd ("exec-done-display", class_support,
2004 &exec_done_display_p, _("\
2005 Set notification of completion for asynchronous execution commands."), _("\
2006 Show notification of completion for asynchronous execution commands."), _("\
2007 Use \"on\" to enable the notification, and \"off\" to disable it."),
2009 show_exec_done_display_p,
2010 &setlist, &showlist);
2012 add_setshow_filename_cmd ("data-directory", class_maintenance,
2013 &staged_gdb_datadir, _("Set GDB's data directory."),
2014 _("Show GDB's data directory."),
2016 When set, GDB uses the specified path to search for data files."),
2017 set_gdb_datadir, show_gdb_datadir,
2023 gdb_init (char *argv0)
2025 if (pre_init_ui_hook)
2026 pre_init_ui_hook ();
2028 /* Run the init function of each source file. */
2031 /* Make sure we return to the original directory upon exit, come
2032 what may, since the OS doesn't do that for us. */
2033 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2036 init_cmd_lists (); /* This needs to be done first. */
2037 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2038 initialize_utils (); /* Make errors and warnings possible. */
2042 /* Here is where we call all the _initialize_foo routines. */
2043 initialize_all_files ();
2045 /* This creates the current_program_space. Do this after all the
2046 _initialize_foo routines have had a chance to install their
2047 per-sspace data keys. Also do this before
2048 initialize_current_architecture is called, because it accesses
2049 exec_bfd of the current program space. */
2050 initialize_progspace ();
2051 initialize_inferiors ();
2052 initialize_current_architecture ();
2054 init_main (); /* But that omits this file! Do it now. */
2056 initialize_stdin_serial ();
2058 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2060 set_initial_gdb_ttystate ();
2062 async_init_signals ();
2064 /* We need a default language for parsing expressions, so simple
2065 things like "set width 0" won't fail if no language is explicitly
2066 set in a config file or implicitly set by reading an executable
2068 set_language (language_c);
2069 expected_language = current_language; /* Don't warn about the change. */
2071 /* Python initialization, for example, can require various commands to be
2072 installed. For example "info pretty-printer" needs the "info"
2073 prefix to be installed. Keep things simple and just do final
2074 script initialization here. */
2075 finish_ext_lang_initialization ();