1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "cli/cli-cmds.h"
23 #include "cli/cli-script.h"
24 #include "cli/cli-setshow.h"
25 #include "cli/cli-decode.h"
31 #include "target-dcache.h"
32 #include "breakpoint.h"
34 #include "expression.h"
37 #include "terminal.h" /* For job_control. */
39 #include "completer.h"
45 #include "event-loop.h"
46 #include "gdbthread.h"
47 #include "extension.h"
51 #include "filenames.h"
53 /* readline include files. */
54 #include "readline/readline.h"
55 #include "readline/history.h"
57 /* readline defines this. */
60 #include <sys/types.h>
62 #include "event-top.h"
67 #include "tracepoint.h"
74 extern void initialize_all_files (void);
76 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
77 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
78 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
80 /* Default command line prompt. This is overriden in some configs. */
82 #ifndef DEFAULT_PROMPT
83 #define DEFAULT_PROMPT "(gdb) "
86 /* Initialization file name for gdb. This is host-dependent. */
88 const char gdbinit[] = GDBINIT;
90 int inhibit_gdbinit = 0;
92 extern char lang_frame_mismatch_warn[]; /* language.c */
94 /* Flag for whether we want to confirm potentially dangerous
95 operations. Default is yes. */
100 show_confirm (struct ui_file *file, int from_tty,
101 struct cmd_list_element *c, const char *value)
103 fprintf_filtered (file, _("Whether to confirm potentially "
104 "dangerous operations is %s.\n"),
108 /* stdio stream that command input is being read from. Set to stdin
109 normally. Set by source_command to the file we are sourcing. Set
110 to NULL if we are executing a user-defined command or interacting
115 /* Flag to indicate whether a user defined command is currently running. */
119 /* Current working directory. */
121 char *current_directory;
123 /* The directory name is actually stored here (usually). */
124 char gdb_dirbuf[1024];
126 /* Function to call before reading a command, if nonzero.
127 The function receives two args: an input stream,
128 and a prompt string. */
130 void (*window_hook) (FILE *, char *);
132 /* Buffer used for reading command lines, and the size
133 allocated for it so far. */
135 char *saved_command_line;
136 int saved_command_line_size = 100;
138 /* Nonzero if the current command is modified by "server ". This
139 affects things like recording into the command history, commands
140 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
141 whatever) can issue its own commands and also send along commands
142 from the user, and have the user not notice that the user interface
143 is issuing commands too. */
146 /* Timeout limit for response from target. */
148 /* The default value has been changed many times over the years. It
149 was originally 5 seconds. But that was thought to be a long time
150 to sit and wait, so it was changed to 2 seconds. That was thought
151 to be plenty unless the connection was going through some terminal
152 server or multiplexer or other form of hairy serial connection.
154 In mid-1996, remote_timeout was moved from remote.c to top.c and
155 it began being used in other remote-* targets. It appears that the
156 default was changed to 20 seconds at that time, perhaps because the
157 Renesas E7000 ICE didn't always respond in a timely manner.
159 But if 5 seconds is a long time to sit and wait for retransmissions,
160 20 seconds is far worse. This demonstrates the difficulty of using
161 a single variable for all protocol timeouts.
163 As remote.c is used much more than remote-e7000.c, it was changed
164 back to 2 seconds in 1999. */
166 int remote_timeout = 2;
168 /* Non-zero tells remote* modules to output debugging info. */
170 int remote_debug = 0;
172 /* Sbrk location on entry to main. Used for statistics only. */
177 /* Hooks for alternate command interfaces. */
179 /* This hook is called from within gdb's many mini-event loops which
180 could steal control from a real user interface's event loop. It
181 returns non-zero if the user is requesting a detach, zero
184 int (*deprecated_ui_loop_hook) (int);
187 /* Called from print_frame_info to list the line we stopped in. */
189 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
193 /* Replaces most of query. */
195 int (*deprecated_query_hook) (const char *, va_list);
197 /* Replaces most of warning. */
199 void (*deprecated_warning_hook) (const char *, va_list);
201 /* These three functions support getting lines of text from the user.
202 They are used in sequence. First deprecated_readline_begin_hook is
203 called with a text string that might be (for example) a message for
204 the user to type in a sequence of commands to be executed at a
205 breakpoint. If this function calls back to a GUI, it might take
206 this opportunity to pop up a text interaction window with this
207 message. Next, deprecated_readline_hook is called with a prompt
208 that is emitted prior to collecting the user input. It can be
209 called multiple times. Finally, deprecated_readline_end_hook is
210 called to notify the GUI that we are done with the interaction
211 window and it can close it. */
213 void (*deprecated_readline_begin_hook) (char *, ...);
214 char *(*deprecated_readline_hook) (const char *);
215 void (*deprecated_readline_end_hook) (void);
217 /* Called as appropriate to notify the interface that we have attached
218 to or detached from an already running process. */
220 void (*deprecated_attach_hook) (void);
221 void (*deprecated_detach_hook) (void);
223 /* Called during long calculations to allow GUI to repair window
224 damage, and to check for stop buttons, etc... */
226 void (*deprecated_interactive_hook) (void);
228 /* Called when going to wait for the target. Usually allows the GUI
229 to run while waiting for target events. */
231 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
232 struct target_waitstatus *status,
235 /* Used by UI as a wrapper around command execution. May do various
236 things like enabling/disabling buttons, etc... */
238 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
239 char *cmd, int from_tty);
241 /* Called when the current thread changes. Argument is thread id. */
243 void (*deprecated_context_hook) (int id);
245 /* Handler for SIGHUP. */
248 /* NOTE 1999-04-29: This function will be static again, once we modify
249 gdb to use the event loop as the default command loop and we merge
250 event-top.c into this file, top.c. */
254 /* Stop asking user for confirmation --- we're exiting. This
255 prevents asking the user dumb questions. */
257 quit_command ((char *) 0, 0);
259 #endif /* defined SIGHUP */
261 /* Line number we are currently in, in a file which is being sourced. */
262 /* NOTE 1999-04-29: This variable will be static again, once we modify
263 gdb to use the event loop as the default command loop and we merge
264 event-top.c into this file, top.c. */
265 /* static */ int source_line_number;
267 /* Name of the file we are sourcing. */
268 /* NOTE 1999-04-29: This variable will be static again, once we modify
269 gdb to use the event loop as the default command loop and we merge
270 event-top.c into this file, top.c. */
271 /* static */ const char *source_file_name;
273 /* Clean up on error during a "source" command (or execution of a
274 user-defined command). */
277 do_restore_instream_cleanup (void *stream)
279 /* Restore the previous input stream. */
283 /* Read commands from STREAM. */
285 read_command_file (FILE *stream)
287 struct cleanup *cleanups;
289 cleanups = make_cleanup (do_restore_instream_cleanup, instream);
292 do_cleanups (cleanups);
295 void (*pre_init_ui_hook) (void);
299 do_chdir_cleanup (void *old_dir)
307 prepare_execute_command (void)
310 struct cleanup *cleanup;
312 mark = value_mark ();
313 cleanup = make_cleanup_value_free_to_mark (mark);
315 /* With multiple threads running while the one we're examining is
316 stopped, the dcache can get stale without us being able to detect
317 it. For the duration of the command, though, use the dcache to
318 help things like backtrace. */
320 target_dcache_invalidate ();
325 /* Tell the user if the language has changed (except first time) after
326 executing a command. */
329 check_frame_language_change (void)
331 static int warned = 0;
332 struct frame_info *frame;
334 /* First make sure that a new frame has been selected, in case the
335 command or the hooks changed the program state. */
336 frame = deprecated_safe_get_selected_frame ();
337 if (current_language != expected_language)
339 if (language_mode == language_mode_auto && info_verbose)
341 language_info (1); /* Print what changed. */
346 /* Warn the user if the working language does not match the language
347 of the current frame. Only warn the user if we are actually
348 running the program, i.e. there is a stack. */
349 /* FIXME: This should be cacheing the frame and only running when
350 the frame changes. */
352 if (has_stack_frames ())
356 flang = get_frame_language (frame);
358 && flang != language_unknown
359 && flang != current_language->la_language)
361 printf_filtered ("%s\n", lang_frame_mismatch_warn);
370 maybe_wait_sync_command_done (int was_sync)
372 /* If the interpreter is in sync mode (we're running a user
373 command's list, running command hooks or similars), and we
374 just ran a synchronous command that started the target, wait
375 for that command to end. */
376 if (!interpreter_async && !was_sync && sync_execution)
378 while (gdb_do_one_event () >= 0)
384 /* Execute the line P as a command, in the current user context.
385 Pass FROM_TTY as second argument to the defining function. */
388 execute_command (char *p, int from_tty)
390 struct cleanup *cleanup_if_error, *cleanup;
391 struct cmd_list_element *c;
394 cleanup_if_error = make_bpstat_clear_actions_cleanup ();
395 cleanup = prepare_execute_command ();
397 /* Force cleanup of any alloca areas if using C alloca instead of
401 /* This can happen when command_line_input hits end of file. */
404 do_cleanups (cleanup);
405 discard_cleanups (cleanup_if_error);
409 target_log_command (p);
411 while (*p == ' ' || *p == '\t')
417 int was_sync = sync_execution;
421 /* If trace-commands is set then this will print this command. */
422 print_command_trace (p);
424 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
427 /* Pass null arg rather than an empty one. */
430 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
431 while the is_complete_command(cfunc) test is just plain
432 bogus. They should both be replaced by a test of the form
433 c->strip_trailing_white_space_p. */
434 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
435 can't be replaced with func. This is because it is the
436 cfunc, and not the func, that has the value that the
437 is_complete_command hack is testing for. */
438 /* Clear off trailing whitespace, except for set and complete
441 && c->type != set_cmd
442 && !is_complete_command (c))
444 p = arg + strlen (arg) - 1;
445 while (p >= arg && (*p == ' ' || *p == '\t'))
450 /* If this command has been pre-hooked, run the hook first. */
451 execute_cmd_pre_hook (c);
453 if (c->deprecated_warn_user)
454 deprecated_cmd_warning (line);
456 /* c->user_commands would be NULL in the case of a python command. */
457 if (c->theclass == class_user && c->user_commands)
458 execute_user_command (c, arg);
459 else if (c->type == set_cmd)
460 do_set_command (arg, from_tty, c);
461 else if (c->type == show_cmd)
462 do_show_command (arg, from_tty, c);
463 else if (!cmd_func_p (c))
464 error (_("That is not a command, just a help topic."));
465 else if (deprecated_call_command_hook)
466 deprecated_call_command_hook (c, arg, from_tty);
468 cmd_func (c, arg, from_tty);
470 maybe_wait_sync_command_done (was_sync);
472 /* If this command has been post-hooked, run the hook last. */
473 execute_cmd_post_hook (c);
477 check_frame_language_change ();
479 do_cleanups (cleanup);
480 discard_cleanups (cleanup_if_error);
483 /* Run execute_command for P and FROM_TTY. Capture its output into the
484 returned string, do not display it to the screen. BATCH_FLAG will be
485 temporarily set to true. */
488 execute_command_to_string (char *p, int from_tty)
490 struct ui_file *str_file;
491 struct cleanup *cleanup;
494 /* GDB_STDOUT should be better already restored during these
495 restoration callbacks. */
496 cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
498 make_cleanup_restore_integer (&interpreter_async);
499 interpreter_async = 0;
501 str_file = mem_fileopen ();
503 make_cleanup_ui_file_delete (str_file);
504 make_cleanup_restore_ui_file (&gdb_stdout);
505 make_cleanup_restore_ui_file (&gdb_stderr);
506 make_cleanup_restore_ui_file (&gdb_stdlog);
507 make_cleanup_restore_ui_file (&gdb_stdtarg);
508 make_cleanup_restore_ui_file (&gdb_stdtargerr);
510 if (ui_out_redirect (current_uiout, str_file) < 0)
511 warning (_("Current output protocol does not support redirection"));
513 make_cleanup_ui_out_redirect_pop (current_uiout);
515 gdb_stdout = str_file;
516 gdb_stderr = str_file;
517 gdb_stdlog = str_file;
518 gdb_stdtarg = str_file;
519 gdb_stdtargerr = str_file;
521 execute_command (p, from_tty);
523 retval = ui_file_xstrdup (str_file, NULL);
525 do_cleanups (cleanup);
530 /* Read commands from `instream' and execute them
531 until end of file or error reading instream. */
536 struct cleanup *old_chain;
538 int stdin_is_tty = ISATTY (stdin);
540 while (instream && !feof (instream))
542 if (window_hook && instream == stdin)
543 (*window_hook) (instream, get_prompt ());
546 if (instream == stdin && stdin_is_tty)
547 reinitialize_more_filter ();
548 old_chain = make_cleanup (null_cleanup, 0);
550 /* Get a command-line. This calls the readline package. */
551 command = command_line_input (instream == stdin ?
552 get_prompt () : (char *) NULL,
553 instream == stdin, "prompt");
556 do_cleanups (old_chain);
560 make_command_stats_cleanup (1);
562 /* Do not execute commented lines. */
563 if (command[0] != '#')
565 execute_command (command, instream == stdin);
567 /* Do any commands attached to breakpoint we are stopped at. */
568 bpstat_do_actions ();
570 do_cleanups (old_chain);
574 /* When nonzero, cause dont_repeat to do nothing. This should only be
575 set via prevent_dont_repeat. */
577 static int suppress_dont_repeat = 0;
579 /* Commands call this if they do not want to be repeated by null lines. */
584 if (suppress_dont_repeat || server_command)
587 /* If we aren't reading from standard input, we are saving the last
588 thing read from stdin in line and don't want to delete it. Null
589 lines won't repeat here in any case. */
590 if (instream == stdin)
591 *saved_command_line = 0;
594 /* Prevent dont_repeat from working, and return a cleanup that
595 restores the previous state. */
598 prevent_dont_repeat (void)
600 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
602 suppress_dont_repeat = 1;
607 /* Read a line from the stream "instream" without command line editing.
609 It prints PROMPT_ARG once at the start.
610 Action is compatible with "readline", e.g. space for the result is
611 malloc'd and should be freed by the caller.
613 A NULL return means end of file. */
615 gdb_readline (const char *prompt_arg)
620 int result_size = 80;
624 /* Don't use a _filtered function here. It causes the assumed
625 character position to be off, since the newline we read from
626 the user is not accounted for. */
627 fputs_unfiltered (prompt_arg, gdb_stdout);
628 gdb_flush (gdb_stdout);
631 result = (char *) xmalloc (result_size);
635 /* Read from stdin if we are executing a user defined command.
636 This is the right thing for prompt_for_continue, at least. */
637 c = fgetc (instream ? instream : stdin);
642 /* The last line does not end with a newline. Return it, and
643 if we are called again fgetc will still return EOF and
644 we'll return NULL then. */
652 if (input_index > 0 && result[input_index - 1] == '\r')
657 result[input_index++] = c;
658 while (input_index >= result_size)
661 result = (char *) xrealloc (result, result_size);
665 result[input_index++] = '\0';
669 /* Variables which control command line editing and history
670 substitution. These variables are given default values at the end
672 static int command_editing_p;
674 /* NOTE 1999-04-29: This variable will be static again, once we modify
675 gdb to use the event loop as the default command loop and we merge
676 event-top.c into this file, top.c. */
678 /* static */ int history_expansion_p;
680 static int write_history_p;
682 show_write_history_p (struct ui_file *file, int from_tty,
683 struct cmd_list_element *c, const char *value)
685 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
689 /* The variable associated with the "set/show history size"
690 command. The value -1 means unlimited, and -2 means undefined. */
691 static int history_size_setshow_var = -2;
694 show_history_size (struct ui_file *file, int from_tty,
695 struct cmd_list_element *c, const char *value)
697 fprintf_filtered (file, _("The size of the command history is %s.\n"),
701 /* Variable associated with the "history remove-duplicates" option.
702 The value -1 means unlimited. */
703 static int history_remove_duplicates = 0;
706 show_history_remove_duplicates (struct ui_file *file, int from_tty,
707 struct cmd_list_element *c, const char *value)
709 fprintf_filtered (file,
710 _("The number of history entries to look back at for "
711 "duplicates is %s.\n"),
715 static char *history_filename;
717 show_history_filename (struct ui_file *file, int from_tty,
718 struct cmd_list_element *c, const char *value)
720 fprintf_filtered (file, _("The filename in which to record "
721 "the command history is \"%s\".\n"),
725 /* This is like readline(), but it has some gdb-specific behavior.
726 gdb may want readline in both the synchronous and async modes during
727 a single gdb invocation. At the ordinary top-level prompt we might
728 be using the async readline. That means we can't use
729 rl_pre_input_hook, since it doesn't work properly in async mode.
730 However, for a secondary prompt (" >", such as occurs during a
731 `define'), gdb wants a synchronous response.
733 We used to call readline() directly, running it in synchronous
734 mode. But mixing modes this way is not supported, and as of
735 readline 5.x it no longer works; the arrow keys come unbound during
736 the synchronous call. So we make a nested call into the event
737 loop. That's what gdb_readline_wrapper is for. */
739 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
740 rely on gdb_readline_wrapper_result, which might still be NULL if
741 the user types Control-D for EOF. */
742 static int gdb_readline_wrapper_done;
744 /* The result of the current call to gdb_readline_wrapper, once a newline
746 static char *gdb_readline_wrapper_result;
748 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
749 to be called after the newline is processed (which will redisplay
750 the prompt). But in gdb_readline_wrapper we will not get a new
751 prompt until the next call, or until we return to the event loop.
752 So we disable this hook around the newline and restore it before we
754 static void (*saved_after_char_processing_hook) (void);
756 /* This function is called when readline has seen a complete line of
760 gdb_readline_wrapper_line (char *line)
762 gdb_assert (!gdb_readline_wrapper_done);
763 gdb_readline_wrapper_result = line;
764 gdb_readline_wrapper_done = 1;
766 /* Prevent operate-and-get-next from acting too early. */
767 saved_after_char_processing_hook = after_char_processing_hook;
768 after_char_processing_hook = NULL;
770 /* Prevent parts of the prompt from being redisplayed if annotations
771 are enabled, and readline's state getting out of sync. We'll
772 reinstall the callback handler, which puts the terminal in raw
773 mode (or in readline lingo, in prepped state), when we're next
774 ready to process user input, either in display_gdb_prompt, or if
775 we're handling an asynchronous target event and running in the
776 background, just before returning to the event loop to process
777 further input (or more target events). */
778 if (async_command_editing_p)
779 gdb_rl_callback_handler_remove ();
782 struct gdb_readline_wrapper_cleanup
784 void (*handler_orig) (char *);
785 int already_prompted_orig;
787 /* Whether the target was async. */
788 int target_is_async_orig;
792 gdb_readline_wrapper_cleanup (void *arg)
794 struct gdb_readline_wrapper_cleanup *cleanup = arg;
796 rl_already_prompted = cleanup->already_prompted_orig;
798 gdb_assert (input_handler == gdb_readline_wrapper_line);
799 input_handler = cleanup->handler_orig;
801 /* Don't restore our input handler in readline yet. That would make
802 readline prep the terminal (putting it in raw mode), while the
803 line we just read may trigger execution of a command that expects
804 the terminal in the default cooked/canonical mode, such as e.g.,
805 running Python's interactive online help utility. See
806 gdb_readline_wrapper_line for when we'll reinstall it. */
808 gdb_readline_wrapper_result = NULL;
809 gdb_readline_wrapper_done = 0;
811 after_char_processing_hook = saved_after_char_processing_hook;
812 saved_after_char_processing_hook = NULL;
814 if (cleanup->target_is_async_orig)
821 gdb_readline_wrapper (const char *prompt)
823 struct cleanup *back_to;
824 struct gdb_readline_wrapper_cleanup *cleanup;
827 cleanup = xmalloc (sizeof (*cleanup));
828 cleanup->handler_orig = input_handler;
829 input_handler = gdb_readline_wrapper_line;
831 cleanup->already_prompted_orig = rl_already_prompted;
833 cleanup->target_is_async_orig = target_is_async_p ();
835 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
837 if (cleanup->target_is_async_orig)
840 /* Display our prompt and prevent double prompt display. */
841 display_gdb_prompt (prompt);
842 rl_already_prompted = 1;
844 if (after_char_processing_hook)
845 (*after_char_processing_hook) ();
846 gdb_assert (after_char_processing_hook == NULL);
848 while (gdb_do_one_event () >= 0)
849 if (gdb_readline_wrapper_done)
852 retval = gdb_readline_wrapper_result;
853 do_cleanups (back_to);
858 /* The current saved history number from operate-and-get-next.
859 This is -1 if not valid. */
860 static int operate_saved_history = -1;
862 /* This is put on the appropriate hook and helps operate-and-get-next
865 gdb_rl_operate_and_get_next_completion (void)
867 int delta = where_history () - operate_saved_history;
869 /* The `key' argument to rl_get_previous_history is ignored. */
870 rl_get_previous_history (delta, 0);
871 operate_saved_history = -1;
873 /* readline doesn't automatically update the display for us. */
876 after_char_processing_hook = NULL;
877 rl_pre_input_hook = NULL;
880 /* This is a gdb-local readline command handler. It accepts the
881 current command line (like RET does) and, if this command was taken
882 from the history, arranges for the next command in the history to
883 appear on the command line when the prompt returns.
884 We ignore the arguments. */
886 gdb_rl_operate_and_get_next (int count, int key)
890 /* Use the async hook. */
891 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
893 /* Find the current line, and find the next line to use. */
894 where = where_history();
896 if ((history_is_stifled () && (history_length >= history_max_entries))
897 || (where >= history_length - 1))
898 operate_saved_history = where;
900 operate_saved_history = where + 1;
902 return rl_newline (1, key);
905 /* Number of user commands executed during this session. */
907 static int command_count = 0;
909 /* Add the user command COMMAND to the input history list. */
912 gdb_add_history (const char *command)
916 if (history_remove_duplicates != 0)
919 int lookbehind_threshold;
921 /* The lookbehind threshold for finding a duplicate history entry is
922 bounded by command_count because we can't meaningfully delete
923 history entries that are already stored in the history file since
924 the history file is appended to. */
925 if (history_remove_duplicates == -1
926 || history_remove_duplicates > command_count)
927 lookbehind_threshold = command_count;
929 lookbehind_threshold = history_remove_duplicates;
932 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
934 HIST_ENTRY *temp = previous_history ();
939 if (strcmp (temp->line, command) == 0)
941 HIST_ENTRY *prev = remove_history (where_history ());
943 free_history_entry (prev);
950 add_history (command);
953 /* Safely append new history entries to the history file in a corruption-free
954 way using an intermediate local history file. */
957 gdb_safe_append_history (void)
959 int ret, saved_errno;
960 char *local_history_filename;
961 struct cleanup *old_chain;
963 local_history_filename
964 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
965 old_chain = make_cleanup (xfree, local_history_filename);
967 ret = rename (history_filename, local_history_filename);
969 if (ret < 0 && saved_errno != ENOENT)
971 warning (_("Could not rename %s to %s: %s"),
972 history_filename, local_history_filename,
973 safe_strerror (saved_errno));
979 /* If the rename failed with ENOENT then either the global history
980 file never existed in the first place or another GDB process is
981 currently appending to it (and has thus temporarily renamed it).
982 Since we can't distinguish between these two cases, we have to
983 conservatively assume the first case and therefore must write out
984 (not append) our known history to our local history file and try
985 to move it back anyway. Otherwise a global history file would
986 never get created! */
987 gdb_assert (saved_errno == ENOENT);
988 write_history (local_history_filename);
992 append_history (command_count, local_history_filename);
993 if (history_is_stifled ())
994 history_truncate_file (local_history_filename, history_max_entries);
997 ret = rename (local_history_filename, history_filename);
999 if (ret < 0 && saved_errno != EEXIST)
1000 warning (_("Could not rename %s to %s: %s"),
1001 local_history_filename, history_filename,
1002 safe_strerror (saved_errno));
1005 do_cleanups (old_chain);
1008 /* Read one line from the command input stream `instream'
1009 into the local static buffer `linebuffer' (whose current length
1011 The buffer is made bigger as necessary.
1012 Returns the address of the start of the line.
1014 NULL is returned for end of file.
1016 *If* the instream == stdin & stdin is a terminal, the line read
1017 is copied into the file line saver (global var char *line,
1018 length linesize) so that it can be duplicated.
1020 This routine either uses fancy command line editing or
1021 simple input as the user has requested. */
1024 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1026 static char *linebuffer = 0;
1027 static unsigned linelength = 0;
1028 const char *prompt = prompt_arg;
1035 /* The annotation suffix must be non-NULL. */
1036 if (annotation_suffix == NULL)
1037 annotation_suffix = "";
1039 if (annotation_level > 1 && instream == stdin)
1043 local_prompt = alloca ((prompt == NULL ? 0 : strlen (prompt))
1044 + strlen (annotation_suffix) + 40);
1046 local_prompt[0] = '\0';
1048 strcpy (local_prompt, prompt);
1049 strcat (local_prompt, "\n\032\032");
1050 strcat (local_prompt, annotation_suffix);
1051 strcat (local_prompt, "\n");
1053 prompt = local_prompt;
1056 if (linebuffer == 0)
1059 linebuffer = (char *) xmalloc (linelength);
1064 /* Control-C quits instantly if typed while in this loop
1065 since it should not wait until the user types a newline. */
1070 signal (STOP_SIGNAL, handle_stop_sig);
1075 /* Make sure that all output has been output. Some machines may
1076 let you get away with leaving out some of the gdb_flush, but
1079 gdb_flush (gdb_stdout);
1080 gdb_flush (gdb_stderr);
1082 if (source_file_name != NULL)
1083 ++source_line_number;
1085 if (annotation_level > 1 && instream == stdin)
1087 puts_unfiltered ("\n\032\032pre-");
1088 puts_unfiltered (annotation_suffix);
1089 puts_unfiltered ("\n");
1092 /* Don't use fancy stuff if not talking to stdin. */
1093 if (deprecated_readline_hook && input_from_terminal_p ())
1095 rl = (*deprecated_readline_hook) (prompt);
1097 else if (command_editing_p && input_from_terminal_p ())
1099 rl = gdb_readline_wrapper (prompt);
1103 rl = gdb_readline (prompt);
1106 if (annotation_level > 1 && instream == stdin)
1108 puts_unfiltered ("\n\032\032post-");
1109 puts_unfiltered (annotation_suffix);
1110 puts_unfiltered ("\n");
1113 if (!rl || rl == (char *) EOF)
1118 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
1120 linelength = strlen (rl) + 1 + (p - linebuffer);
1121 nline = (char *) xrealloc (linebuffer, linelength);
1122 p += nline - linebuffer;
1126 /* Copy line. Don't copy null at end. (Leaves line alone
1127 if this was just a newline). */
1131 xfree (rl); /* Allocated in readline. */
1133 if (p == linebuffer || *(p - 1) != '\\')
1136 p--; /* Put on top of '\'. */
1142 signal (STOP_SIGNAL, SIG_DFL);
1149 #define SERVER_COMMAND_LENGTH 7
1151 (p - linebuffer > SERVER_COMMAND_LENGTH)
1152 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
1155 /* Note that we don't set `line'. Between this and the check in
1156 dont_repeat, this insures that repeating will still do the
1159 return linebuffer + SERVER_COMMAND_LENGTH;
1162 /* Do history expansion if that is wished. */
1163 if (history_expansion_p && instream == stdin
1164 && ISATTY (instream))
1166 char *history_value;
1169 *p = '\0'; /* Insert null now. */
1170 expanded = history_expand (linebuffer, &history_value);
1173 /* Print the changes. */
1174 printf_unfiltered ("%s\n", history_value);
1176 /* If there was an error, call this function again. */
1179 xfree (history_value);
1180 return command_line_input (prompt, repeat,
1183 if (strlen (history_value) > linelength)
1185 linelength = strlen (history_value) + 1;
1186 linebuffer = (char *) xrealloc (linebuffer, linelength);
1188 strcpy (linebuffer, history_value);
1189 p = linebuffer + strlen (linebuffer);
1191 xfree (history_value);
1194 /* If we just got an empty line, and that is supposed to repeat the
1195 previous command, return the value in the global buffer. */
1196 if (repeat && p == linebuffer)
1197 return saved_command_line;
1198 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
1200 return saved_command_line;
1204 /* Add line to history if appropriate. */
1205 if (*linebuffer && input_from_terminal_p ())
1206 gdb_add_history (linebuffer);
1208 /* Save into global buffer if appropriate. */
1211 if (linelength > saved_command_line_size)
1213 saved_command_line = xrealloc (saved_command_line, linelength);
1214 saved_command_line_size = linelength;
1216 strcpy (saved_command_line, linebuffer);
1217 return saved_command_line;
1223 /* Print the GDB banner. */
1225 print_gdb_version (struct ui_file *stream)
1227 /* From GNU coding standards, first line is meant to be easy for a
1228 program to parse, and is just canonical program name and version
1229 number, which starts after last space. */
1231 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1233 /* Second line is a copyright notice. */
1235 fprintf_filtered (stream,
1236 "Copyright (C) 2015 Free Software Foundation, Inc.\n");
1238 /* Following the copyright is a brief statement that the program is
1239 free software, that users are free to copy and change it on
1240 certain conditions, that it is covered by the GNU GPL, and that
1241 there is no warranty. */
1243 fprintf_filtered (stream, "\
1244 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1245 \nThis is free software: you are free to change and redistribute it.\n\
1246 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1247 and \"show warranty\" for details.\n");
1249 /* After the required info we print the configuration information. */
1251 fprintf_filtered (stream, "This GDB was configured as \"");
1252 if (strcmp (host_name, target_name) != 0)
1254 fprintf_filtered (stream, "--host=%s --target=%s",
1255 host_name, target_name);
1259 fprintf_filtered (stream, "%s", host_name);
1261 fprintf_filtered (stream, "\".\n\
1262 Type \"show configuration\" for configuration details.");
1264 if (REPORT_BUGS_TO[0])
1266 fprintf_filtered (stream,
1267 _("\nFor bug reporting instructions, please see:\n"));
1268 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1270 fprintf_filtered (stream,
1271 _("Find the GDB manual and other documentation \
1272 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1273 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1274 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1275 commands related to \"word\"."));
1278 /* Print the details of GDB build-time configuration. */
1280 print_gdb_configuration (struct ui_file *stream)
1282 fprintf_filtered (stream, _("\
1283 This GDB was configured as follows:\n\
1284 configure --host=%s --target=%s\n\
1285 "), host_name, target_name);
1286 fprintf_filtered (stream, _("\
1287 --with-auto-load-dir=%s\n\
1288 --with-auto-load-safe-path=%s\n\
1289 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1291 fprintf_filtered (stream, _("\
1295 fprintf_filtered (stream, _("\
1300 fprintf_filtered (stream, _("\
1301 --with-gdb-datadir=%s%s\n\
1302 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1304 fprintf_filtered (stream, _("\
1305 --with-iconv-bin=%s%s\n\
1306 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1308 if (JIT_READER_DIR[0])
1309 fprintf_filtered (stream, _("\
1310 --with-jit-reader-dir=%s%s\n\
1311 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1312 #if HAVE_LIBUNWIND_IA64_H
1313 fprintf_filtered (stream, _("\
1314 --with-libunwind-ia64\n\
1317 fprintf_filtered (stream, _("\
1318 --without-libunwind-ia64\n\
1322 fprintf_filtered (stream, _("\
1326 fprintf_filtered (stream, _("\
1330 #ifdef WITH_PYTHON_PATH
1331 fprintf_filtered (stream, _("\
1332 --with-python=%s%s\n\
1333 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1336 fprintf_filtered (stream, _("\
1340 fprintf_filtered (stream, _("\
1345 fprintf_filtered (stream, _("\
1346 --with-relocated-sources=%s\n\
1350 fprintf_filtered (stream, _("\
1351 --with-separate-debug-dir=%s%s\n\
1352 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1353 if (TARGET_SYSTEM_ROOT[0])
1354 fprintf_filtered (stream, _("\
1355 --with-sysroot=%s%s\n\
1356 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1357 if (SYSTEM_GDBINIT[0])
1358 fprintf_filtered (stream, _("\
1359 --with-system-gdbinit=%s%s\n\
1360 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1361 #if HAVE_LIBBABELTRACE
1362 fprintf_filtered (stream, _("\
1363 --with-babeltrace\n\
1366 fprintf_filtered (stream, _("\
1367 --without-babeltrace\n\
1370 /* We assume "relocatable" will be printed at least once, thus we always
1371 print this text. It's a reasonably safe assumption for now. */
1372 fprintf_filtered (stream, _("\n\
1373 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1374 tree, and GDB will still find it.)\n\
1379 /* The current top level prompt, settable with "set prompt", and/or
1380 with the python `gdb.prompt_hook' hook. */
1381 static char *top_prompt;
1383 /* Access method for the GDB prompt string. */
1391 /* Set method for the GDB prompt string. */
1394 set_prompt (const char *s)
1396 char *p = xstrdup (s);
1409 /* Callback for iterate_over_inferiors. Kills or detaches the given
1410 inferior, depending on how we originally gained control of it. */
1413 kill_or_detach (struct inferior *inf, void *args)
1415 struct qt_args *qt = args;
1416 struct thread_info *thread;
1421 thread = any_thread_of_process (inf->pid);
1424 switch_to_thread (thread->ptid);
1426 /* Leave core files alone. */
1427 if (target_has_execution)
1429 if (inf->attach_flag)
1430 target_detach (qt->args, qt->from_tty);
1439 /* Callback for iterate_over_inferiors. Prints info about what GDB
1440 will do to each inferior on a "quit". ARG points to a struct
1441 ui_out where output is to be collected. */
1444 print_inferior_quit_action (struct inferior *inf, void *arg)
1446 struct ui_file *stb = arg;
1451 if (inf->attach_flag)
1452 fprintf_filtered (stb,
1453 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1454 target_pid_to_str (pid_to_ptid (inf->pid)));
1456 fprintf_filtered (stb,
1457 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1458 target_pid_to_str (pid_to_ptid (inf->pid)));
1463 /* If necessary, make the user confirm that we should quit. Return
1464 non-zero if we should quit, zero if we shouldn't. */
1469 struct ui_file *stb;
1470 struct cleanup *old_chain;
1474 /* Don't even ask if we're only debugging a core file inferior. */
1475 if (!have_live_inferiors ())
1478 /* Build the query string as a single string. */
1479 stb = mem_fileopen ();
1480 old_chain = make_cleanup_ui_file_delete (stb);
1482 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1483 iterate_over_inferiors (print_inferior_quit_action, stb);
1484 fprintf_filtered (stb, _("\nQuit anyway? "));
1486 str = ui_file_xstrdup (stb, NULL);
1487 make_cleanup (xfree, str);
1489 qr = query ("%s", str);
1490 do_cleanups (old_chain);
1494 /* Prepare to exit GDB cleanly by undoing any changes made to the
1495 terminal so that we leave the terminal in the state we acquired it. */
1498 undo_terminal_modifications_before_exit (void)
1500 target_terminal_ours ();
1504 if (async_command_editing_p)
1505 gdb_disable_readline ();
1509 /* Quit without asking for confirmation. */
1512 quit_force (char *args, int from_tty)
1517 undo_terminal_modifications_before_exit ();
1519 /* An optional expression may be used to cause gdb to terminate with the
1520 value of that expression. */
1523 struct value *val = parse_and_eval (args);
1525 exit_code = (int) value_as_long (val);
1527 else if (return_child_result)
1528 exit_code = return_child_result_value;
1531 qt.from_tty = from_tty;
1533 /* We want to handle any quit errors and exit regardless. */
1535 /* Get out of tfind mode, and kill or detach all inferiors. */
1538 disconnect_tracing ();
1539 iterate_over_inferiors (kill_or_detach, &qt);
1541 CATCH (ex, RETURN_MASK_ALL)
1543 exception_print (gdb_stderr, ex);
1547 /* Give all pushed targets a chance to do minimal cleanup, and pop
1553 CATCH (ex, RETURN_MASK_ALL)
1555 exception_print (gdb_stderr, ex);
1559 /* Save the history information if it is appropriate to do so. */
1562 if (write_history_p && history_filename
1563 && input_from_terminal_p ())
1564 gdb_safe_append_history ();
1566 CATCH (ex, RETURN_MASK_ALL)
1568 exception_print (gdb_stderr, ex);
1572 /* Do any final cleanups before exiting. */
1575 do_final_cleanups (all_cleanups ());
1577 CATCH (ex, RETURN_MASK_ALL)
1579 exception_print (gdb_stderr, ex);
1586 /* Returns whether GDB is running on a terminal and input is
1587 currently coming from that terminal. */
1590 input_from_terminal_p (void)
1595 if (gdb_has_a_terminal () && instream == stdin)
1598 /* If INSTREAM is unset, and we are not in a user command, we
1599 must be in Insight. That's like having a terminal, for our
1601 if (instream == NULL && !in_user_command)
1608 dont_repeat_command (char *ignored, int from_tty)
1610 /* Can't call dont_repeat here because we're not necessarily reading
1612 *saved_command_line = 0;
1615 /* Functions to manipulate command line editing control variables. */
1617 /* Number of commands to print in each call to show_commands. */
1618 #define Hist_print 10
1620 show_commands (char *args, int from_tty)
1622 /* Index for history commands. Relative to history_base. */
1625 /* Number of the history entry which we are planning to display next.
1626 Relative to history_base. */
1629 /* Print out some of the commands from the command history. */
1633 if (args[0] == '+' && args[1] == '\0')
1634 /* "info editing +" should print from the stored position. */
1637 /* "info editing <exp>" should print around command number <exp>. */
1638 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1640 /* "show commands" means print the last Hist_print commands. */
1643 num = history_length - Hist_print;
1649 /* If there are at least Hist_print commands, we want to display the last
1650 Hist_print rather than, say, the last 6. */
1651 if (history_length - num < Hist_print)
1653 num = history_length - Hist_print;
1659 offset < num + Hist_print && offset < history_length;
1662 printf_filtered ("%5d %s\n", history_base + offset,
1663 (history_get (history_base + offset))->line);
1666 /* The next command we want to display is the next one that we haven't
1670 /* If the user repeats this command with return, it should do what
1671 "show commands +" does. This is unnecessary if arg is null,
1672 because "show commands +" is not useful after "show commands". */
1673 if (from_tty && args)
1680 /* Update the size of our command history file to HISTORY_SIZE.
1682 A HISTORY_SIZE of -1 stands for unlimited. */
1685 set_readline_history_size (int history_size)
1687 gdb_assert (history_size >= -1);
1689 if (history_size == -1)
1690 unstifle_history ();
1692 stifle_history (history_size);
1695 /* Called by do_setshow_command. */
1697 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1699 set_readline_history_size (history_size_setshow_var);
1703 set_history (char *args, int from_tty)
1705 printf_unfiltered (_("\"set history\" must be followed "
1706 "by the name of a history subcommand.\n"));
1707 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1711 show_history (char *args, int from_tty)
1713 cmd_show_list (showhistlist, from_tty, "");
1716 int info_verbose = 0; /* Default verbose msgs off. */
1718 /* Called by do_setshow_command. An elaborate joke. */
1720 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1722 const char *cmdname = "verbose";
1723 struct cmd_list_element *showcmd;
1725 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1726 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1730 c->doc = "Set verbose printing of informational messages.";
1731 showcmd->doc = "Show verbose printing of informational messages.";
1735 c->doc = "Set verbosity.";
1736 showcmd->doc = "Show verbosity.";
1740 /* Init the history buffer. Note that we are called after the init file(s)
1741 have been read so that the user can change the history file via his
1742 .gdbinit file (for instance). The GDBHISTFILE environment variable
1743 overrides all of this. */
1750 tmpenv = getenv ("GDBHISTSIZE");
1757 tmpenv = skip_spaces (tmpenv);
1759 var = strtol (tmpenv, &endptr, 10);
1760 saved_errno = errno;
1761 endptr = skip_spaces (endptr);
1763 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1764 empty string, a negative number or a huge positive number (larger than
1765 INT_MAX) then set the history size to unlimited. Otherwise set our
1766 history size to the number we have read. This behavior is consistent
1767 with how bash handles HISTSIZE. */
1768 if (*endptr != '\0')
1770 else if (*tmpenv == '\0'
1773 /* On targets where INT_MAX == LONG_MAX, we have to look at
1774 errno after calling strtol to distinguish between a value that
1775 is exactly INT_MAX and an overflowing value that was clamped
1777 || (var == INT_MAX && saved_errno == ERANGE))
1778 history_size_setshow_var = -1;
1780 history_size_setshow_var = var;
1783 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1785 if (history_size_setshow_var == -2)
1786 history_size_setshow_var = 256;
1788 set_readline_history_size (history_size_setshow_var);
1790 tmpenv = getenv ("GDBHISTFILE");
1792 history_filename = xstrdup (tmpenv);
1793 else if (!history_filename)
1795 /* We include the current directory so that if the user changes
1796 directories the file written will be the same as the one
1799 /* No leading dots in file names are allowed on MSDOS. */
1800 history_filename = concat (current_directory, "/_gdb_history",
1803 history_filename = concat (current_directory, "/.gdb_history",
1807 read_history (history_filename);
1811 show_prompt (struct ui_file *file, int from_tty,
1812 struct cmd_list_element *c, const char *value)
1814 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1818 show_async_command_editing_p (struct ui_file *file, int from_tty,
1819 struct cmd_list_element *c, const char *value)
1821 fprintf_filtered (file, _("Editing of command lines as "
1822 "they are typed is %s.\n"),
1827 show_annotation_level (struct ui_file *file, int from_tty,
1828 struct cmd_list_element *c, const char *value)
1830 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1834 show_exec_done_display_p (struct ui_file *file, int from_tty,
1835 struct cmd_list_element *c, const char *value)
1837 fprintf_filtered (file, _("Notification of completion for "
1838 "asynchronous execution commands is %s.\n"),
1842 /* New values of the "data-directory" parameter are staged here. */
1843 static char *staged_gdb_datadir;
1845 /* "set" command for the gdb_datadir configuration variable. */
1848 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1850 set_gdb_data_directory (staged_gdb_datadir);
1851 observer_notify_gdb_datadir_changed ();
1854 /* "show" command for the gdb_datadir configuration variable. */
1857 show_gdb_datadir (struct ui_file *file, int from_tty,
1858 struct cmd_list_element *c, const char *value)
1860 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1865 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1867 /* We include the current directory so that if the user changes
1868 directories the file written will be the same as the one
1870 if (!IS_ABSOLUTE_PATH (history_filename))
1871 history_filename = reconcat (history_filename, current_directory, "/",
1872 history_filename, (char *) NULL);
1878 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1879 the DEFAULT_PROMPT is. */
1880 set_prompt (DEFAULT_PROMPT);
1882 /* Set things up for annotation_level > 1, if the user ever decides
1884 async_annotation_suffix = "prompt";
1886 /* Set the important stuff up for command editing. */
1887 command_editing_p = 1;
1888 history_expansion_p = 0;
1889 write_history_p = 0;
1891 /* Setup important stuff for command line editing. */
1892 rl_completion_word_break_hook = gdb_completion_word_break_characters;
1893 rl_completion_entry_function = readline_line_completion_function;
1894 rl_completer_word_break_characters = default_word_break_characters ();
1895 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1896 rl_completion_display_matches_hook = cli_display_match_list;
1897 rl_readline_name = "gdb";
1898 rl_terminal_name = getenv ("TERM");
1900 /* The name for this defun comes from Bash, where it originated.
1901 15 is Control-o, the same binding this function has in Bash. */
1902 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1904 add_setshow_string_cmd ("prompt", class_support,
1906 _("Set gdb's prompt"),
1907 _("Show gdb's prompt"),
1910 &setlist, &showlist);
1912 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1913 Don't repeat this command.\nPrimarily \
1914 used inside of user-defined commands that should not be repeated when\n\
1917 add_setshow_boolean_cmd ("editing", class_support,
1918 &async_command_editing_p, _("\
1919 Set editing of command lines as they are typed."), _("\
1920 Show editing of command lines as they are typed."), _("\
1921 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1922 Without an argument, command line editing is enabled. To edit, use\n\
1923 EMACS-like or VI-like commands like control-P or ESC."),
1924 set_async_editing_command,
1925 show_async_command_editing_p,
1926 &setlist, &showlist);
1928 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1929 Set saving of the history record on exit."), _("\
1930 Show saving of the history record on exit."), _("\
1931 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1932 Without an argument, saving is enabled."),
1934 show_write_history_p,
1935 &sethistlist, &showhistlist);
1937 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
1938 &history_size_setshow_var, _("\
1939 Set the size of the command history,"), _("\
1940 Show the size of the command history,"), _("\
1941 ie. the number of previous commands to keep a record of.\n\
1942 If set to \"unlimited\", the number of commands kept in the history\n\
1943 list is unlimited. This defaults to the value of the environment\n\
1944 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1945 set_history_size_command,
1947 &sethistlist, &showhistlist);
1949 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
1950 &history_remove_duplicates, _("\
1951 Set how far back in history to look for and remove duplicate entries."), _("\
1952 Show how far back in history to look for and remove duplicate entries."), _("\
1953 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1954 and remove the first history entry that is a duplicate of the most recent\n\
1955 entry, each time a new history entry is added.\n\
1956 If set to \"unlimited\", this lookbehind is unbounded.\n\
1957 Only history entries added during this session are considered for removal.\n\
1958 If set to 0, removal of duplicate history entries is disabled.\n\
1959 By default this option is set to 0."),
1961 show_history_remove_duplicates,
1962 &sethistlist, &showhistlist);
1964 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1965 Set the filename in which to record the command history"), _("\
1966 Show the filename in which to record the command history"), _("\
1967 (the list of previous commands of which a record is kept)."),
1968 set_history_filename,
1969 show_history_filename,
1970 &sethistlist, &showhistlist);
1972 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
1973 Set whether to confirm potentially dangerous operations."), _("\
1974 Show whether to confirm potentially dangerous operations."), NULL,
1977 &setlist, &showlist);
1979 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1980 Set annotation_level."), _("\
1981 Show annotation_level."), _("\
1982 0 == normal; 1 == fullname (for use when running under emacs)\n\
1983 2 == output annotated suitably for use by programs that control GDB."),
1985 show_annotation_level,
1986 &setlist, &showlist);
1988 add_setshow_boolean_cmd ("exec-done-display", class_support,
1989 &exec_done_display_p, _("\
1990 Set notification of completion for asynchronous execution commands."), _("\
1991 Show notification of completion for asynchronous execution commands."), _("\
1992 Use \"on\" to enable the notification, and \"off\" to disable it."),
1994 show_exec_done_display_p,
1995 &setlist, &showlist);
1997 add_setshow_filename_cmd ("data-directory", class_maintenance,
1998 &staged_gdb_datadir, _("Set GDB's data directory."),
1999 _("Show GDB's data directory."),
2001 When set, GDB uses the specified path to search for data files."),
2002 set_gdb_datadir, show_gdb_datadir,
2008 gdb_init (char *argv0)
2010 if (pre_init_ui_hook)
2011 pre_init_ui_hook ();
2013 /* Run the init function of each source file. */
2016 /* Make sure we return to the original directory upon exit, come
2017 what may, since the OS doesn't do that for us. */
2018 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2021 init_cmd_lists (); /* This needs to be done first. */
2022 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2023 initialize_utils (); /* Make errors and warnings possible. */
2027 /* Here is where we call all the _initialize_foo routines. */
2028 initialize_all_files ();
2030 /* This creates the current_program_space. Do this after all the
2031 _initialize_foo routines have had a chance to install their
2032 per-sspace data keys. Also do this before
2033 initialize_current_architecture is called, because it accesses
2034 exec_bfd of the current program space. */
2035 initialize_progspace ();
2036 initialize_inferiors ();
2037 initialize_current_architecture ();
2039 init_main (); /* But that omits this file! Do it now. */
2041 initialize_stdin_serial ();
2043 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2045 set_initial_gdb_ttystate ();
2047 async_init_signals ();
2049 /* We need a default language for parsing expressions, so simple
2050 things like "set width 0" won't fail if no language is explicitly
2051 set in a config file or implicitly set by reading an executable
2053 set_language (language_c);
2054 expected_language = current_language; /* Don't warn about the change. */
2056 /* Python initialization, for example, can require various commands to be
2057 installed. For example "info pretty-printer" needs the "info"
2058 prefix to be installed. Keep things simple and just do final
2059 script initialization here. */
2060 finish_ext_lang_initialization ();