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 #include "gdb_select.h"
56 /* readline include files. */
57 #include "readline/readline.h"
58 #include "readline/history.h"
60 /* readline defines this. */
63 #include <sys/types.h>
65 #include "event-top.h"
70 #include "tracepoint.h"
77 extern void initialize_all_files (void);
79 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
80 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
81 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
83 /* Default command line prompt. This is overriden in some configs. */
85 #ifndef DEFAULT_PROMPT
86 #define DEFAULT_PROMPT "(gdb) "
89 /* Generate a function that exports a pointer to a field of the
92 #define gen_ret_current_ui_field_ptr(type, name) \
94 current_ui_## name ## _ptr (void) \
96 return ¤t_ui->m_ ## name; \
99 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdout)
100 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdin)
101 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stderr)
102 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdlog)
103 gen_ret_current_ui_field_ptr (struct ui_out *, current_uiout)
105 /* Initialization file name for gdb. This is host-dependent. */
107 const char gdbinit[] = GDBINIT;
109 int inhibit_gdbinit = 0;
111 extern char lang_frame_mismatch_warn[]; /* language.c */
113 /* Flag for whether we want to confirm potentially dangerous
114 operations. Default is yes. */
119 show_confirm (struct ui_file *file, int from_tty,
120 struct cmd_list_element *c, const char *value)
122 fprintf_filtered (file, _("Whether to confirm potentially "
123 "dangerous operations is %s.\n"),
127 /* Flag to indicate whether a user defined command is currently running. */
131 /* Current working directory. */
133 char *current_directory;
135 /* The directory name is actually stored here (usually). */
136 char gdb_dirbuf[1024];
138 /* The last command line executed on the console. Used for command
140 char *saved_command_line;
142 /* Nonzero if the current command is modified by "server ". This
143 affects things like recording into the command history, commands
144 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
145 whatever) can issue its own commands and also send along commands
146 from the user, and have the user not notice that the user interface
147 is issuing commands too. */
150 /* Timeout limit for response from target. */
152 /* The default value has been changed many times over the years. It
153 was originally 5 seconds. But that was thought to be a long time
154 to sit and wait, so it was changed to 2 seconds. That was thought
155 to be plenty unless the connection was going through some terminal
156 server or multiplexer or other form of hairy serial connection.
158 In mid-1996, remote_timeout was moved from remote.c to top.c and
159 it began being used in other remote-* targets. It appears that the
160 default was changed to 20 seconds at that time, perhaps because the
161 Renesas E7000 ICE didn't always respond in a timely manner.
163 But if 5 seconds is a long time to sit and wait for retransmissions,
164 20 seconds is far worse. This demonstrates the difficulty of using
165 a single variable for all protocol timeouts.
167 As remote.c is used much more than remote-e7000.c, it was changed
168 back to 2 seconds in 1999. */
170 int remote_timeout = 2;
172 /* Non-zero tells remote* modules to output debugging info. */
174 int remote_debug = 0;
176 /* Sbrk location on entry to main. Used for statistics only. */
181 /* Hooks for alternate command interfaces. */
183 /* This hook is called from within gdb's many mini-event loops which
184 could steal control from a real user interface's event loop. It
185 returns non-zero if the user is requesting a detach, zero
188 int (*deprecated_ui_loop_hook) (int);
191 /* Called from print_frame_info to list the line we stopped in. */
193 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
197 /* Replaces most of query. */
199 int (*deprecated_query_hook) (const char *, va_list);
201 /* Replaces most of warning. */
203 void (*deprecated_warning_hook) (const char *, va_list);
205 /* These three functions support getting lines of text from the user.
206 They are used in sequence. First deprecated_readline_begin_hook is
207 called with a text string that might be (for example) a message for
208 the user to type in a sequence of commands to be executed at a
209 breakpoint. If this function calls back to a GUI, it might take
210 this opportunity to pop up a text interaction window with this
211 message. Next, deprecated_readline_hook is called with a prompt
212 that is emitted prior to collecting the user input. It can be
213 called multiple times. Finally, deprecated_readline_end_hook is
214 called to notify the GUI that we are done with the interaction
215 window and it can close it. */
217 void (*deprecated_readline_begin_hook) (char *, ...);
218 char *(*deprecated_readline_hook) (const char *);
219 void (*deprecated_readline_end_hook) (void);
221 /* Called as appropriate to notify the interface that we have attached
222 to or detached from an already running process. */
224 void (*deprecated_attach_hook) (void);
225 void (*deprecated_detach_hook) (void);
227 /* Called during long calculations to allow GUI to repair window
228 damage, and to check for stop buttons, etc... */
230 void (*deprecated_interactive_hook) (void);
232 /* Called when going to wait for the target. Usually allows the GUI
233 to run while waiting for target events. */
235 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
236 struct target_waitstatus *status,
239 /* Used by UI as a wrapper around command execution. May do various
240 things like enabling/disabling buttons, etc... */
242 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
243 char *cmd, int from_tty);
245 /* Called when the current thread changes. Argument is thread id. */
247 void (*deprecated_context_hook) (int id);
249 /* The highest UI number ever assigned. */
250 static int highest_ui_num;
255 new_ui (FILE *instream, FILE *outstream, FILE *errstream)
259 ui = XCNEW (struct ui);
261 ui->num = ++highest_ui_num;
262 ui->instream = instream;
263 ui->outstream = outstream;
264 ui->errstream = errstream;
266 ui->input_fd = fileno (ui->instream);
268 ui->m_gdb_stdin = stdio_fileopen (ui->instream);
269 ui->m_gdb_stdout = stdio_fileopen (ui->outstream);
270 ui->m_gdb_stderr = stderr_fileopen (ui->errstream);
271 ui->m_gdb_stdlog = ui->m_gdb_stderr;
273 ui->prompt_state = PROMPT_NEEDED;
281 for (last = ui_list; last->next != NULL; last = last->next)
290 free_ui (struct ui *ui)
292 ui_file_delete (ui->m_gdb_stdin);
293 ui_file_delete (ui->m_gdb_stdout);
294 ui_file_delete (ui->m_gdb_stderr);
300 delete_ui (struct ui *todel)
302 struct ui *ui, *uiprev;
306 for (ui = ui_list; ui != NULL; uiprev = ui, ui = ui->next)
310 gdb_assert (ui != NULL);
313 uiprev->next = ui->next;
320 /* Handler for SIGHUP. */
323 /* NOTE 1999-04-29: This function will be static again, once we modify
324 gdb to use the event loop as the default command loop and we merge
325 event-top.c into this file, top.c. */
329 /* Stop asking user for confirmation --- we're exiting. This
330 prevents asking the user dumb questions. */
332 quit_command ((char *) 0, 0);
334 #endif /* defined SIGHUP */
336 /* Line number we are currently in, in a file which is being sourced. */
337 /* NOTE 1999-04-29: This variable will be static again, once we modify
338 gdb to use the event loop as the default command loop and we merge
339 event-top.c into this file, top.c. */
340 /* static */ int source_line_number;
342 /* Name of the file we are sourcing. */
343 /* NOTE 1999-04-29: This variable will be static again, once we modify
344 gdb to use the event loop as the default command loop and we merge
345 event-top.c into this file, top.c. */
346 /* static */ const char *source_file_name;
348 /* Clean up on error during a "source" command (or execution of a
349 user-defined command). */
352 do_restore_instream_cleanup (void *stream)
354 struct ui *ui = current_ui;
356 /* Restore the previous input stream. */
357 ui->instream = (FILE *) stream;
360 /* Read commands from STREAM. */
362 read_command_file (FILE *stream)
364 struct ui *ui = current_ui;
365 struct cleanup *cleanups;
367 cleanups = make_cleanup (do_restore_instream_cleanup, ui->instream);
368 ui->instream = stream;
370 /* Read commands from `instream' and execute them until end of file
371 or error reading instream. */
373 while (ui->instream != NULL && !feof (ui->instream))
377 /* Get a command-line. This calls the readline package. */
378 command = command_line_input (NULL, 0, NULL);
381 command_handler (command);
384 do_cleanups (cleanups);
387 void (*pre_init_ui_hook) (void);
391 do_chdir_cleanup (void *old_dir)
399 prepare_execute_command (void)
402 struct cleanup *cleanup;
404 mark = value_mark ();
405 cleanup = make_cleanup_value_free_to_mark (mark);
407 /* With multiple threads running while the one we're examining is
408 stopped, the dcache can get stale without us being able to detect
409 it. For the duration of the command, though, use the dcache to
410 help things like backtrace. */
412 target_dcache_invalidate ();
417 /* Tell the user if the language has changed (except first time) after
418 executing a command. */
421 check_frame_language_change (void)
423 static int warned = 0;
424 struct frame_info *frame;
426 /* First make sure that a new frame has been selected, in case the
427 command or the hooks changed the program state. */
428 frame = deprecated_safe_get_selected_frame ();
429 if (current_language != expected_language)
431 if (language_mode == language_mode_auto && info_verbose)
433 language_info (1); /* Print what changed. */
438 /* Warn the user if the working language does not match the language
439 of the current frame. Only warn the user if we are actually
440 running the program, i.e. there is a stack. */
441 /* FIXME: This should be cacheing the frame and only running when
442 the frame changes. */
444 if (has_stack_frames ())
448 flang = get_frame_language (frame);
450 && flang != language_unknown
451 && flang != current_language->la_language)
453 printf_filtered ("%s\n", lang_frame_mismatch_warn);
462 wait_sync_command_done (void)
464 while (gdb_do_one_event () >= 0)
465 if (current_ui->prompt_state != PROMPT_BLOCKED)
472 maybe_wait_sync_command_done (int was_sync)
474 /* If the interpreter is in sync mode (we're running a user
475 command's list, running command hooks or similars), and we
476 just ran a synchronous command that started the target, wait
477 for that command to end. */
478 if (!current_ui->async
480 && current_ui->prompt_state == PROMPT_BLOCKED)
481 wait_sync_command_done ();
484 /* Execute the line P as a command, in the current user context.
485 Pass FROM_TTY as second argument to the defining function. */
488 execute_command (char *p, int from_tty)
490 struct cleanup *cleanup_if_error, *cleanup;
491 struct cmd_list_element *c;
494 cleanup_if_error = make_bpstat_clear_actions_cleanup ();
495 cleanup = prepare_execute_command ();
497 /* Force cleanup of any alloca areas if using C alloca instead of
501 /* This can happen when command_line_input hits end of file. */
504 do_cleanups (cleanup);
505 discard_cleanups (cleanup_if_error);
509 target_log_command (p);
511 while (*p == ' ' || *p == '\t')
517 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
521 /* If trace-commands is set then this will print this command. */
522 print_command_trace (p);
524 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
527 /* Pass null arg rather than an empty one. */
530 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
531 while the is_complete_command(cfunc) test is just plain
532 bogus. They should both be replaced by a test of the form
533 c->strip_trailing_white_space_p. */
534 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
535 can't be replaced with func. This is because it is the
536 cfunc, and not the func, that has the value that the
537 is_complete_command hack is testing for. */
538 /* Clear off trailing whitespace, except for set and complete
541 && c->type != set_cmd
542 && !is_complete_command (c))
544 p = arg + strlen (arg) - 1;
545 while (p >= arg && (*p == ' ' || *p == '\t'))
550 /* If this command has been pre-hooked, run the hook first. */
551 execute_cmd_pre_hook (c);
553 if (c->deprecated_warn_user)
554 deprecated_cmd_warning (line);
556 /* c->user_commands would be NULL in the case of a python command. */
557 if (c->theclass == class_user && c->user_commands)
558 execute_user_command (c, arg);
559 else if (c->type == set_cmd)
560 do_set_command (arg, from_tty, c);
561 else if (c->type == show_cmd)
562 do_show_command (arg, from_tty, c);
563 else if (!cmd_func_p (c))
564 error (_("That is not a command, just a help topic."));
565 else if (deprecated_call_command_hook)
566 deprecated_call_command_hook (c, arg, from_tty);
568 cmd_func (c, arg, from_tty);
570 maybe_wait_sync_command_done (was_sync);
572 /* If this command has been post-hooked, run the hook last. */
573 execute_cmd_post_hook (c);
577 check_frame_language_change ();
579 do_cleanups (cleanup);
580 discard_cleanups (cleanup_if_error);
583 /* Run execute_command for P and FROM_TTY. Capture its output into the
584 returned string, do not display it to the screen. BATCH_FLAG will be
585 temporarily set to true. */
588 execute_command_to_string (char *p, int from_tty)
590 struct ui_file *str_file;
591 struct cleanup *cleanup;
594 /* GDB_STDOUT should be better already restored during these
595 restoration callbacks. */
596 cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
598 make_cleanup_restore_integer (¤t_ui->async);
599 current_ui->async = 0;
601 str_file = mem_fileopen ();
603 make_cleanup_ui_file_delete (str_file);
604 make_cleanup_restore_ui_file (&gdb_stdout);
605 make_cleanup_restore_ui_file (&gdb_stderr);
606 make_cleanup_restore_ui_file (&gdb_stdlog);
607 make_cleanup_restore_ui_file (&gdb_stdtarg);
608 make_cleanup_restore_ui_file (&gdb_stdtargerr);
610 if (ui_out_redirect (current_uiout, str_file) < 0)
611 warning (_("Current output protocol does not support redirection"));
613 make_cleanup_ui_out_redirect_pop (current_uiout);
615 gdb_stdout = str_file;
616 gdb_stderr = str_file;
617 gdb_stdlog = str_file;
618 gdb_stdtarg = str_file;
619 gdb_stdtargerr = str_file;
621 execute_command (p, from_tty);
623 retval = ui_file_xstrdup (str_file, NULL);
625 do_cleanups (cleanup);
631 /* When nonzero, cause dont_repeat to do nothing. This should only be
632 set via prevent_dont_repeat. */
634 static int suppress_dont_repeat = 0;
636 /* Commands call this if they do not want to be repeated by null lines. */
641 struct ui *ui = current_ui;
643 if (suppress_dont_repeat || server_command)
646 /* If we aren't reading from standard input, we are saving the last
647 thing read from stdin in line and don't want to delete it. Null
648 lines won't repeat here in any case. */
649 if (ui->instream == stdin)
650 *saved_command_line = 0;
653 /* Prevent dont_repeat from working, and return a cleanup that
654 restores the previous state. */
657 prevent_dont_repeat (void)
659 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
661 suppress_dont_repeat = 1;
666 /* Read a line from the stream "instream" without command line editing.
668 It prints PROMPT once at the start.
669 Action is compatible with "readline", e.g. space for the result is
670 malloc'd and should be freed by the caller.
672 A NULL return means end of file. */
675 gdb_readline_no_editing (const char *prompt)
677 struct buffer line_buffer;
678 struct ui *ui = current_ui;
679 /* Read from stdin if we are executing a user defined command. This
680 is the right thing for prompt_for_continue, at least. */
681 FILE *stream = ui->instream != NULL ? ui->instream : stdin;
682 int fd = fileno (stream);
684 buffer_init (&line_buffer);
688 /* Don't use a _filtered function here. It causes the assumed
689 character position to be off, since the newline we read from
690 the user is not accounted for. */
691 fputs_unfiltered (prompt, gdb_stdout);
692 gdb_flush (gdb_stdout);
703 /* Wait until at least one byte of data is available. Control-C
704 can interrupt interruptible_select, but not fgetc. */
706 FD_SET (fd, &readfds);
707 if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
711 /* If this was ctrl-c, the QUIT above handles it. */
714 perror_with_name (("select"));
721 if (line_buffer.used_size > 0)
722 /* The last line does not end with a newline. Return it, and
723 if we are called again fgetc will still return EOF and
724 we'll return NULL then. */
726 xfree (buffer_finish (&line_buffer));
732 if (line_buffer.used_size > 0
733 && line_buffer.buffer[line_buffer.used_size - 1] == '\r')
734 line_buffer.used_size--;
738 buffer_grow_char (&line_buffer, c);
741 buffer_grow_char (&line_buffer, '\0');
742 return buffer_finish (&line_buffer);
745 /* Variables which control command line editing and history
746 substitution. These variables are given default values at the end
748 static int command_editing_p;
750 /* NOTE 1999-04-29: This variable will be static again, once we modify
751 gdb to use the event loop as the default command loop and we merge
752 event-top.c into this file, top.c. */
754 /* static */ int history_expansion_p;
756 static int write_history_p;
758 show_write_history_p (struct ui_file *file, int from_tty,
759 struct cmd_list_element *c, const char *value)
761 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
765 /* The variable associated with the "set/show history size"
766 command. The value -1 means unlimited, and -2 means undefined. */
767 static int history_size_setshow_var = -2;
770 show_history_size (struct ui_file *file, int from_tty,
771 struct cmd_list_element *c, const char *value)
773 fprintf_filtered (file, _("The size of the command history is %s.\n"),
777 /* Variable associated with the "history remove-duplicates" option.
778 The value -1 means unlimited. */
779 static int history_remove_duplicates = 0;
782 show_history_remove_duplicates (struct ui_file *file, int from_tty,
783 struct cmd_list_element *c, const char *value)
785 fprintf_filtered (file,
786 _("The number of history entries to look back at for "
787 "duplicates is %s.\n"),
791 static char *history_filename;
793 show_history_filename (struct ui_file *file, int from_tty,
794 struct cmd_list_element *c, const char *value)
796 fprintf_filtered (file, _("The filename in which to record "
797 "the command history is \"%s\".\n"),
801 /* This is like readline(), but it has some gdb-specific behavior.
802 gdb may want readline in both the synchronous and async modes during
803 a single gdb invocation. At the ordinary top-level prompt we might
804 be using the async readline. That means we can't use
805 rl_pre_input_hook, since it doesn't work properly in async mode.
806 However, for a secondary prompt (" >", such as occurs during a
807 `define'), gdb wants a synchronous response.
809 We used to call readline() directly, running it in synchronous
810 mode. But mixing modes this way is not supported, and as of
811 readline 5.x it no longer works; the arrow keys come unbound during
812 the synchronous call. So we make a nested call into the event
813 loop. That's what gdb_readline_wrapper is for. */
815 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
816 rely on gdb_readline_wrapper_result, which might still be NULL if
817 the user types Control-D for EOF. */
818 static int gdb_readline_wrapper_done;
820 /* The result of the current call to gdb_readline_wrapper, once a newline
822 static char *gdb_readline_wrapper_result;
824 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
825 to be called after the newline is processed (which will redisplay
826 the prompt). But in gdb_readline_wrapper we will not get a new
827 prompt until the next call, or until we return to the event loop.
828 So we disable this hook around the newline and restore it before we
830 static void (*saved_after_char_processing_hook) (void);
836 gdb_in_secondary_prompt_p (struct ui *ui)
838 return ui->secondary_prompt_depth > 0;
842 /* This function is called when readline has seen a complete line of
846 gdb_readline_wrapper_line (char *line)
848 gdb_assert (!gdb_readline_wrapper_done);
849 gdb_readline_wrapper_result = line;
850 gdb_readline_wrapper_done = 1;
852 /* Prevent operate-and-get-next from acting too early. */
853 saved_after_char_processing_hook = after_char_processing_hook;
854 after_char_processing_hook = NULL;
856 /* Prevent parts of the prompt from being redisplayed if annotations
857 are enabled, and readline's state getting out of sync. We'll
858 reinstall the callback handler, which puts the terminal in raw
859 mode (or in readline lingo, in prepped state), when we're next
860 ready to process user input, either in display_gdb_prompt, or if
861 we're handling an asynchronous target event and running in the
862 background, just before returning to the event loop to process
863 further input (or more target events). */
864 if (current_ui->command_editing)
865 gdb_rl_callback_handler_remove ();
868 struct gdb_readline_wrapper_cleanup
870 void (*handler_orig) (char *);
871 int already_prompted_orig;
873 /* Whether the target was async. */
874 int target_is_async_orig;
878 gdb_readline_wrapper_cleanup (void *arg)
880 struct ui *ui = current_ui;
881 struct gdb_readline_wrapper_cleanup *cleanup
882 = (struct gdb_readline_wrapper_cleanup *) arg;
884 if (ui->command_editing)
885 rl_already_prompted = cleanup->already_prompted_orig;
887 gdb_assert (ui->input_handler == gdb_readline_wrapper_line);
888 ui->input_handler = cleanup->handler_orig;
890 /* Don't restore our input handler in readline yet. That would make
891 readline prep the terminal (putting it in raw mode), while the
892 line we just read may trigger execution of a command that expects
893 the terminal in the default cooked/canonical mode, such as e.g.,
894 running Python's interactive online help utility. See
895 gdb_readline_wrapper_line for when we'll reinstall it. */
897 gdb_readline_wrapper_result = NULL;
898 gdb_readline_wrapper_done = 0;
899 ui->secondary_prompt_depth--;
900 gdb_assert (ui->secondary_prompt_depth >= 0);
902 after_char_processing_hook = saved_after_char_processing_hook;
903 saved_after_char_processing_hook = NULL;
905 if (cleanup->target_is_async_orig)
912 gdb_readline_wrapper (const char *prompt)
914 struct ui *ui = current_ui;
915 struct cleanup *back_to;
916 struct gdb_readline_wrapper_cleanup *cleanup;
919 cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
920 cleanup->handler_orig = ui->input_handler;
921 ui->input_handler = gdb_readline_wrapper_line;
923 if (ui->command_editing)
924 cleanup->already_prompted_orig = rl_already_prompted;
926 cleanup->already_prompted_orig = 0;
928 cleanup->target_is_async_orig = target_is_async_p ();
930 ui->secondary_prompt_depth++;
931 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
933 if (cleanup->target_is_async_orig)
936 /* Display our prompt and prevent double prompt display. */
937 display_gdb_prompt (prompt);
938 if (ui->command_editing)
939 rl_already_prompted = 1;
941 if (after_char_processing_hook)
942 (*after_char_processing_hook) ();
943 gdb_assert (after_char_processing_hook == NULL);
945 while (gdb_do_one_event () >= 0)
946 if (gdb_readline_wrapper_done)
949 retval = gdb_readline_wrapper_result;
950 do_cleanups (back_to);
955 /* The current saved history number from operate-and-get-next.
956 This is -1 if not valid. */
957 static int operate_saved_history = -1;
959 /* This is put on the appropriate hook and helps operate-and-get-next
962 gdb_rl_operate_and_get_next_completion (void)
964 int delta = where_history () - operate_saved_history;
966 /* The `key' argument to rl_get_previous_history is ignored. */
967 rl_get_previous_history (delta, 0);
968 operate_saved_history = -1;
970 /* readline doesn't automatically update the display for us. */
973 after_char_processing_hook = NULL;
974 rl_pre_input_hook = NULL;
977 /* This is a gdb-local readline command handler. It accepts the
978 current command line (like RET does) and, if this command was taken
979 from the history, arranges for the next command in the history to
980 appear on the command line when the prompt returns.
981 We ignore the arguments. */
983 gdb_rl_operate_and_get_next (int count, int key)
987 /* Use the async hook. */
988 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
990 /* Find the current line, and find the next line to use. */
991 where = where_history();
993 if ((history_is_stifled () && (history_length >= history_max_entries))
994 || (where >= history_length - 1))
995 operate_saved_history = where;
997 operate_saved_history = where + 1;
999 return rl_newline (1, key);
1002 /* Number of user commands executed during this session. */
1004 static int command_count = 0;
1006 /* Add the user command COMMAND to the input history list. */
1009 gdb_add_history (const char *command)
1013 if (history_remove_duplicates != 0)
1016 int lookbehind_threshold;
1018 /* The lookbehind threshold for finding a duplicate history entry is
1019 bounded by command_count because we can't meaningfully delete
1020 history entries that are already stored in the history file since
1021 the history file is appended to. */
1022 if (history_remove_duplicates == -1
1023 || history_remove_duplicates > command_count)
1024 lookbehind_threshold = command_count;
1026 lookbehind_threshold = history_remove_duplicates;
1029 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
1031 HIST_ENTRY *temp = previous_history ();
1036 if (strcmp (temp->line, command) == 0)
1038 HIST_ENTRY *prev = remove_history (where_history ());
1040 free_history_entry (prev);
1047 add_history (command);
1050 /* Safely append new history entries to the history file in a corruption-free
1051 way using an intermediate local history file. */
1054 gdb_safe_append_history (void)
1056 int ret, saved_errno;
1057 char *local_history_filename;
1058 struct cleanup *old_chain;
1060 local_history_filename
1061 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
1062 old_chain = make_cleanup (xfree, local_history_filename);
1064 ret = rename (history_filename, local_history_filename);
1065 saved_errno = errno;
1066 if (ret < 0 && saved_errno != ENOENT)
1068 warning (_("Could not rename %s to %s: %s"),
1069 history_filename, local_history_filename,
1070 safe_strerror (saved_errno));
1076 /* If the rename failed with ENOENT then either the global history
1077 file never existed in the first place or another GDB process is
1078 currently appending to it (and has thus temporarily renamed it).
1079 Since we can't distinguish between these two cases, we have to
1080 conservatively assume the first case and therefore must write out
1081 (not append) our known history to our local history file and try
1082 to move it back anyway. Otherwise a global history file would
1083 never get created! */
1084 gdb_assert (saved_errno == ENOENT);
1085 write_history (local_history_filename);
1089 append_history (command_count, local_history_filename);
1090 if (history_is_stifled ())
1091 history_truncate_file (local_history_filename, history_max_entries);
1094 ret = rename (local_history_filename, history_filename);
1095 saved_errno = errno;
1096 if (ret < 0 && saved_errno != EEXIST)
1097 warning (_("Could not rename %s to %s: %s"),
1098 local_history_filename, history_filename,
1099 safe_strerror (saved_errno));
1102 do_cleanups (old_chain);
1105 /* Read one line from the command input stream `instream' into a local
1106 static buffer. The buffer is made bigger as necessary. Returns
1107 the address of the start of the line.
1109 NULL is returned for end of file.
1111 *If* the instream == stdin & stdin is a terminal, the line read is
1112 copied into the global 'saved_command_line' so that it can be
1115 This routine either uses fancy command line editing or simple input
1116 as the user has requested. */
1119 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1121 static struct buffer cmd_line_buffer;
1122 static int cmd_line_buffer_initialized;
1123 struct ui *ui = current_ui;
1124 const char *prompt = prompt_arg;
1127 /* The annotation suffix must be non-NULL. */
1128 if (annotation_suffix == NULL)
1129 annotation_suffix = "";
1131 if (annotation_level > 1 && ui->instream == stdin)
1136 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1137 + strlen (annotation_suffix) + 40);
1139 local_prompt[0] = '\0';
1141 strcpy (local_prompt, prompt);
1142 strcat (local_prompt, "\n\032\032");
1143 strcat (local_prompt, annotation_suffix);
1144 strcat (local_prompt, "\n");
1146 prompt = local_prompt;
1149 if (!cmd_line_buffer_initialized)
1151 buffer_init (&cmd_line_buffer);
1152 cmd_line_buffer_initialized = 1;
1155 /* Starting a new command line. */
1156 cmd_line_buffer.used_size = 0;
1160 signal (STOP_SIGNAL, handle_stop_sig);
1167 /* Make sure that all output has been output. Some machines may
1168 let you get away with leaving out some of the gdb_flush, but
1171 gdb_flush (gdb_stdout);
1172 gdb_flush (gdb_stderr);
1174 if (source_file_name != NULL)
1175 ++source_line_number;
1177 if (annotation_level > 1 && ui->instream == stdin)
1179 puts_unfiltered ("\n\032\032pre-");
1180 puts_unfiltered (annotation_suffix);
1181 puts_unfiltered ("\n");
1184 /* Don't use fancy stuff if not talking to stdin. */
1185 if (deprecated_readline_hook && input_from_terminal_p ())
1187 rl = (*deprecated_readline_hook) (prompt);
1189 else if (command_editing_p && input_from_terminal_p ())
1191 rl = gdb_readline_wrapper (prompt);
1195 rl = gdb_readline_no_editing (prompt);
1198 cmd = handle_line_of_input (&cmd_line_buffer, rl,
1199 repeat, annotation_suffix);
1200 if (cmd == (char *) EOF)
1213 signal (STOP_SIGNAL, SIG_DFL);
1219 /* Print the GDB banner. */
1221 print_gdb_version (struct ui_file *stream)
1223 /* From GNU coding standards, first line is meant to be easy for a
1224 program to parse, and is just canonical program name and version
1225 number, which starts after last space. */
1227 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1229 /* Second line is a copyright notice. */
1231 fprintf_filtered (stream,
1232 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1234 /* Following the copyright is a brief statement that the program is
1235 free software, that users are free to copy and change it on
1236 certain conditions, that it is covered by the GNU GPL, and that
1237 there is no warranty. */
1239 fprintf_filtered (stream, "\
1240 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1241 \nThis is free software: you are free to change and redistribute it.\n\
1242 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1243 and \"show warranty\" for details.\n");
1245 /* After the required info we print the configuration information. */
1247 fprintf_filtered (stream, "This GDB was configured as \"");
1248 if (strcmp (host_name, target_name) != 0)
1250 fprintf_filtered (stream, "--host=%s --target=%s",
1251 host_name, target_name);
1255 fprintf_filtered (stream, "%s", host_name);
1257 fprintf_filtered (stream, "\".\n\
1258 Type \"show configuration\" for configuration details.");
1260 if (REPORT_BUGS_TO[0])
1262 fprintf_filtered (stream,
1263 _("\nFor bug reporting instructions, please see:\n"));
1264 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1266 fprintf_filtered (stream,
1267 _("Find the GDB manual and other documentation \
1268 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1269 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1270 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1271 commands related to \"word\"."));
1274 /* Print the details of GDB build-time configuration. */
1276 print_gdb_configuration (struct ui_file *stream)
1278 fprintf_filtered (stream, _("\
1279 This GDB was configured as follows:\n\
1280 configure --host=%s --target=%s\n\
1281 "), host_name, target_name);
1282 fprintf_filtered (stream, _("\
1283 --with-auto-load-dir=%s\n\
1284 --with-auto-load-safe-path=%s\n\
1285 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1287 fprintf_filtered (stream, _("\
1291 fprintf_filtered (stream, _("\
1296 fprintf_filtered (stream, _("\
1297 --with-gdb-datadir=%s%s\n\
1298 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1300 fprintf_filtered (stream, _("\
1301 --with-iconv-bin=%s%s\n\
1302 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1304 if (JIT_READER_DIR[0])
1305 fprintf_filtered (stream, _("\
1306 --with-jit-reader-dir=%s%s\n\
1307 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1308 #if HAVE_LIBUNWIND_IA64_H
1309 fprintf_filtered (stream, _("\
1310 --with-libunwind-ia64\n\
1313 fprintf_filtered (stream, _("\
1314 --without-libunwind-ia64\n\
1318 fprintf_filtered (stream, _("\
1322 fprintf_filtered (stream, _("\
1326 #ifdef WITH_PYTHON_PATH
1327 fprintf_filtered (stream, _("\
1328 --with-python=%s%s\n\
1329 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1332 fprintf_filtered (stream, _("\
1336 fprintf_filtered (stream, _("\
1341 fprintf_filtered (stream, _("\
1342 --with-relocated-sources=%s\n\
1346 fprintf_filtered (stream, _("\
1347 --with-separate-debug-dir=%s%s\n\
1348 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1349 if (TARGET_SYSTEM_ROOT[0])
1350 fprintf_filtered (stream, _("\
1351 --with-sysroot=%s%s\n\
1352 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1353 if (SYSTEM_GDBINIT[0])
1354 fprintf_filtered (stream, _("\
1355 --with-system-gdbinit=%s%s\n\
1356 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1357 #if HAVE_LIBBABELTRACE
1358 fprintf_filtered (stream, _("\
1359 --with-babeltrace\n\
1362 fprintf_filtered (stream, _("\
1363 --without-babeltrace\n\
1366 /* We assume "relocatable" will be printed at least once, thus we always
1367 print this text. It's a reasonably safe assumption for now. */
1368 fprintf_filtered (stream, _("\n\
1369 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1370 tree, and GDB will still find it.)\n\
1375 /* The current top level prompt, settable with "set prompt", and/or
1376 with the python `gdb.prompt_hook' hook. */
1377 static char *top_prompt;
1379 /* Access method for the GDB prompt string. */
1387 /* Set method for the GDB prompt string. */
1390 set_prompt (const char *s)
1392 char *p = xstrdup (s);
1405 /* Callback for iterate_over_inferiors. Kills or detaches the given
1406 inferior, depending on how we originally gained control of it. */
1409 kill_or_detach (struct inferior *inf, void *args)
1411 struct qt_args *qt = (struct qt_args *) args;
1412 struct thread_info *thread;
1417 thread = any_thread_of_process (inf->pid);
1420 switch_to_thread (thread->ptid);
1422 /* Leave core files alone. */
1423 if (target_has_execution)
1425 if (inf->attach_flag)
1426 target_detach (qt->args, qt->from_tty);
1435 /* Callback for iterate_over_inferiors. Prints info about what GDB
1436 will do to each inferior on a "quit". ARG points to a struct
1437 ui_out where output is to be collected. */
1440 print_inferior_quit_action (struct inferior *inf, void *arg)
1442 struct ui_file *stb = (struct ui_file *) arg;
1447 if (inf->attach_flag)
1448 fprintf_filtered (stb,
1449 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1450 target_pid_to_str (pid_to_ptid (inf->pid)));
1452 fprintf_filtered (stb,
1453 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1454 target_pid_to_str (pid_to_ptid (inf->pid)));
1459 /* If necessary, make the user confirm that we should quit. Return
1460 non-zero if we should quit, zero if we shouldn't. */
1465 struct ui_file *stb;
1466 struct cleanup *old_chain;
1470 /* Don't even ask if we're only debugging a core file inferior. */
1471 if (!have_live_inferiors ())
1474 /* Build the query string as a single string. */
1475 stb = mem_fileopen ();
1476 old_chain = make_cleanup_ui_file_delete (stb);
1478 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1479 iterate_over_inferiors (print_inferior_quit_action, stb);
1480 fprintf_filtered (stb, _("\nQuit anyway? "));
1482 str = ui_file_xstrdup (stb, NULL);
1483 make_cleanup (xfree, str);
1485 qr = query ("%s", str);
1486 do_cleanups (old_chain);
1490 /* Prepare to exit GDB cleanly by undoing any changes made to the
1491 terminal so that we leave the terminal in the state we acquired it. */
1494 undo_terminal_modifications_before_exit (void)
1496 struct ui *saved_top_level = current_ui;
1498 target_terminal_ours ();
1500 current_ui = main_ui;
1505 gdb_disable_readline ();
1507 current_ui = saved_top_level;
1511 /* Quit without asking for confirmation. */
1514 quit_force (char *args, int from_tty)
1519 undo_terminal_modifications_before_exit ();
1521 /* An optional expression may be used to cause gdb to terminate with the
1522 value of that expression. */
1525 struct value *val = parse_and_eval (args);
1527 exit_code = (int) value_as_long (val);
1529 else if (return_child_result)
1530 exit_code = return_child_result_value;
1533 qt.from_tty = from_tty;
1535 /* We want to handle any quit errors and exit regardless. */
1537 /* Get out of tfind mode, and kill or detach all inferiors. */
1540 disconnect_tracing ();
1541 iterate_over_inferiors (kill_or_detach, &qt);
1543 CATCH (ex, RETURN_MASK_ALL)
1545 exception_print (gdb_stderr, ex);
1549 /* Give all pushed targets a chance to do minimal cleanup, and pop
1555 CATCH (ex, RETURN_MASK_ALL)
1557 exception_print (gdb_stderr, ex);
1561 /* Save the history information if it is appropriate to do so. */
1564 if (write_history_p && history_filename
1565 && input_from_terminal_p ())
1566 gdb_safe_append_history ();
1568 CATCH (ex, RETURN_MASK_ALL)
1570 exception_print (gdb_stderr, ex);
1574 /* Do any final cleanups before exiting. */
1577 do_final_cleanups (all_cleanups ());
1579 CATCH (ex, RETURN_MASK_ALL)
1581 exception_print (gdb_stderr, ex);
1588 /* Returns whether GDB is running on a terminal and input is
1589 currently coming from that terminal. */
1592 input_from_terminal_p (void)
1594 struct ui *ui = current_ui;
1599 if (gdb_has_a_terminal () && ui->instream == stdin)
1602 /* If INSTREAM is unset, and we are not in a user command, we
1603 must be in Insight. That's like having a terminal, for our
1605 if (ui->instream == NULL && !in_user_command)
1612 dont_repeat_command (char *ignored, int from_tty)
1614 /* Can't call dont_repeat here because we're not necessarily reading
1616 *saved_command_line = 0;
1619 /* Functions to manipulate command line editing control variables. */
1621 /* Number of commands to print in each call to show_commands. */
1622 #define Hist_print 10
1624 show_commands (char *args, int from_tty)
1626 /* Index for history commands. Relative to history_base. */
1629 /* Number of the history entry which we are planning to display next.
1630 Relative to history_base. */
1633 /* Print out some of the commands from the command history. */
1637 if (args[0] == '+' && args[1] == '\0')
1638 /* "info editing +" should print from the stored position. */
1641 /* "info editing <exp>" should print around command number <exp>. */
1642 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1644 /* "show commands" means print the last Hist_print commands. */
1647 num = history_length - Hist_print;
1653 /* If there are at least Hist_print commands, we want to display the last
1654 Hist_print rather than, say, the last 6. */
1655 if (history_length - num < Hist_print)
1657 num = history_length - Hist_print;
1663 offset < num + Hist_print && offset < history_length;
1666 printf_filtered ("%5d %s\n", history_base + offset,
1667 (history_get (history_base + offset))->line);
1670 /* The next command we want to display is the next one that we haven't
1674 /* If the user repeats this command with return, it should do what
1675 "show commands +" does. This is unnecessary if arg is null,
1676 because "show commands +" is not useful after "show commands". */
1677 if (from_tty && args)
1684 /* Update the size of our command history file to HISTORY_SIZE.
1686 A HISTORY_SIZE of -1 stands for unlimited. */
1689 set_readline_history_size (int history_size)
1691 gdb_assert (history_size >= -1);
1693 if (history_size == -1)
1694 unstifle_history ();
1696 stifle_history (history_size);
1699 /* Called by do_setshow_command. */
1701 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1703 set_readline_history_size (history_size_setshow_var);
1707 set_history (char *args, int from_tty)
1709 printf_unfiltered (_("\"set history\" must be followed "
1710 "by the name of a history subcommand.\n"));
1711 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1715 show_history (char *args, int from_tty)
1717 cmd_show_list (showhistlist, from_tty, "");
1720 int info_verbose = 0; /* Default verbose msgs off. */
1722 /* Called by do_setshow_command. An elaborate joke. */
1724 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1726 const char *cmdname = "verbose";
1727 struct cmd_list_element *showcmd;
1729 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1730 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1734 c->doc = "Set verbose printing of informational messages.";
1735 showcmd->doc = "Show verbose printing of informational messages.";
1739 c->doc = "Set verbosity.";
1740 showcmd->doc = "Show verbosity.";
1744 /* Init the history buffer. Note that we are called after the init file(s)
1745 have been read so that the user can change the history file via his
1746 .gdbinit file (for instance). The GDBHISTFILE environment variable
1747 overrides all of this. */
1754 tmpenv = getenv ("GDBHISTSIZE");
1761 tmpenv = skip_spaces (tmpenv);
1763 var = strtol (tmpenv, &endptr, 10);
1764 saved_errno = errno;
1765 endptr = skip_spaces (endptr);
1767 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1768 empty string, a negative number or a huge positive number (larger than
1769 INT_MAX) then set the history size to unlimited. Otherwise set our
1770 history size to the number we have read. This behavior is consistent
1771 with how bash handles HISTSIZE. */
1772 if (*endptr != '\0')
1774 else if (*tmpenv == '\0'
1777 /* On targets where INT_MAX == LONG_MAX, we have to look at
1778 errno after calling strtol to distinguish between a value that
1779 is exactly INT_MAX and an overflowing value that was clamped
1781 || (var == INT_MAX && saved_errno == ERANGE))
1782 history_size_setshow_var = -1;
1784 history_size_setshow_var = var;
1787 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1789 if (history_size_setshow_var == -2)
1790 history_size_setshow_var = 256;
1792 set_readline_history_size (history_size_setshow_var);
1794 tmpenv = getenv ("GDBHISTFILE");
1796 history_filename = xstrdup (tmpenv);
1797 else if (!history_filename)
1799 /* We include the current directory so that if the user changes
1800 directories the file written will be the same as the one
1803 /* No leading dots in file names are allowed on MSDOS. */
1804 history_filename = concat (current_directory, "/_gdb_history",
1807 history_filename = concat (current_directory, "/.gdb_history",
1811 read_history (history_filename);
1815 show_prompt (struct ui_file *file, int from_tty,
1816 struct cmd_list_element *c, const char *value)
1818 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1821 /* "set editing" command. */
1824 set_editing (char *args, int from_tty, struct cmd_list_element *c)
1826 change_line_handler (set_editing_cmd_var);
1827 /* Update the control variable so that MI's =cmd-param-changed event
1828 shows the correct value. */
1829 set_editing_cmd_var = current_ui->command_editing;
1833 show_editing (struct ui_file *file, int from_tty,
1834 struct cmd_list_element *c, const char *value)
1836 fprintf_filtered (file, _("Editing of command lines as "
1837 "they are typed is %s.\n"),
1838 current_ui->command_editing ? _("on") : _("off"));
1842 show_annotation_level (struct ui_file *file, int from_tty,
1843 struct cmd_list_element *c, const char *value)
1845 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1849 show_exec_done_display_p (struct ui_file *file, int from_tty,
1850 struct cmd_list_element *c, const char *value)
1852 fprintf_filtered (file, _("Notification of completion for "
1853 "asynchronous execution commands is %s.\n"),
1857 /* New values of the "data-directory" parameter are staged here. */
1858 static char *staged_gdb_datadir;
1860 /* "set" command for the gdb_datadir configuration variable. */
1863 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1865 set_gdb_data_directory (staged_gdb_datadir);
1866 observer_notify_gdb_datadir_changed ();
1869 /* "show" command for the gdb_datadir configuration variable. */
1872 show_gdb_datadir (struct ui_file *file, int from_tty,
1873 struct cmd_list_element *c, const char *value)
1875 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1880 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1882 /* We include the current directory so that if the user changes
1883 directories the file written will be the same as the one
1885 if (!IS_ABSOLUTE_PATH (history_filename))
1886 history_filename = reconcat (history_filename, current_directory, "/",
1887 history_filename, (char *) NULL);
1893 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1894 the DEFAULT_PROMPT is. */
1895 set_prompt (DEFAULT_PROMPT);
1897 /* Set the important stuff up for command editing. */
1898 command_editing_p = 1;
1899 history_expansion_p = 0;
1900 write_history_p = 0;
1902 /* Setup important stuff for command line editing. */
1903 rl_completion_word_break_hook = gdb_completion_word_break_characters;
1904 rl_completion_entry_function = readline_line_completion_function;
1905 rl_completer_word_break_characters = default_word_break_characters ();
1906 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1907 rl_completion_display_matches_hook = cli_display_match_list;
1908 rl_readline_name = "gdb";
1909 rl_terminal_name = getenv ("TERM");
1911 /* The name for this defun comes from Bash, where it originated.
1912 15 is Control-o, the same binding this function has in Bash. */
1913 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1915 add_setshow_string_cmd ("prompt", class_support,
1917 _("Set gdb's prompt"),
1918 _("Show gdb's prompt"),
1921 &setlist, &showlist);
1923 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1924 Don't repeat this command.\nPrimarily \
1925 used inside of user-defined commands that should not be repeated when\n\
1928 add_setshow_boolean_cmd ("editing", class_support,
1929 &set_editing_cmd_var, _("\
1930 Set editing of command lines as they are typed."), _("\
1931 Show editing of command lines as they are typed."), _("\
1932 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1933 Without an argument, command line editing is enabled. To edit, use\n\
1934 EMACS-like or VI-like commands like control-P or ESC."),
1937 &setlist, &showlist);
1939 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1940 Set saving of the history record on exit."), _("\
1941 Show saving of the history record on exit."), _("\
1942 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1943 Without an argument, saving is enabled."),
1945 show_write_history_p,
1946 &sethistlist, &showhistlist);
1948 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
1949 &history_size_setshow_var, _("\
1950 Set the size of the command history,"), _("\
1951 Show the size of the command history,"), _("\
1952 ie. the number of previous commands to keep a record of.\n\
1953 If set to \"unlimited\", the number of commands kept in the history\n\
1954 list is unlimited. This defaults to the value of the environment\n\
1955 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
1956 set_history_size_command,
1958 &sethistlist, &showhistlist);
1960 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
1961 &history_remove_duplicates, _("\
1962 Set how far back in history to look for and remove duplicate entries."), _("\
1963 Show how far back in history to look for and remove duplicate entries."), _("\
1964 If set to a nonzero value N, GDB will look back at the last N history entries\n\
1965 and remove the first history entry that is a duplicate of the most recent\n\
1966 entry, each time a new history entry is added.\n\
1967 If set to \"unlimited\", this lookbehind is unbounded.\n\
1968 Only history entries added during this session are considered for removal.\n\
1969 If set to 0, removal of duplicate history entries is disabled.\n\
1970 By default this option is set to 0."),
1972 show_history_remove_duplicates,
1973 &sethistlist, &showhistlist);
1975 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1976 Set the filename in which to record the command history"), _("\
1977 Show the filename in which to record the command history"), _("\
1978 (the list of previous commands of which a record is kept)."),
1979 set_history_filename,
1980 show_history_filename,
1981 &sethistlist, &showhistlist);
1983 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
1984 Set whether to confirm potentially dangerous operations."), _("\
1985 Show whether to confirm potentially dangerous operations."), NULL,
1988 &setlist, &showlist);
1990 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1991 Set annotation_level."), _("\
1992 Show annotation_level."), _("\
1993 0 == normal; 1 == fullname (for use when running under emacs)\n\
1994 2 == output annotated suitably for use by programs that control GDB."),
1996 show_annotation_level,
1997 &setlist, &showlist);
1999 add_setshow_boolean_cmd ("exec-done-display", class_support,
2000 &exec_done_display_p, _("\
2001 Set notification of completion for asynchronous execution commands."), _("\
2002 Show notification of completion for asynchronous execution commands."), _("\
2003 Use \"on\" to enable the notification, and \"off\" to disable it."),
2005 show_exec_done_display_p,
2006 &setlist, &showlist);
2008 add_setshow_filename_cmd ("data-directory", class_maintenance,
2009 &staged_gdb_datadir, _("Set GDB's data directory."),
2010 _("Show GDB's data directory."),
2012 When set, GDB uses the specified path to search for data files."),
2013 set_gdb_datadir, show_gdb_datadir,
2019 gdb_init (char *argv0)
2021 if (pre_init_ui_hook)
2022 pre_init_ui_hook ();
2024 /* Run the init function of each source file. */
2027 /* Make sure we return to the original directory upon exit, come
2028 what may, since the OS doesn't do that for us. */
2029 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2032 init_cmd_lists (); /* This needs to be done first. */
2033 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2034 initialize_utils (); /* Make errors and warnings possible. */
2038 /* Here is where we call all the _initialize_foo routines. */
2039 initialize_all_files ();
2041 /* This creates the current_program_space. Do this after all the
2042 _initialize_foo routines have had a chance to install their
2043 per-sspace data keys. Also do this before
2044 initialize_current_architecture is called, because it accesses
2045 exec_bfd of the current program space. */
2046 initialize_progspace ();
2047 initialize_inferiors ();
2048 initialize_current_architecture ();
2050 init_main (); /* But that omits this file! Do it now. */
2052 initialize_stdin_serial ();
2054 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2056 set_initial_gdb_ttystate ();
2058 async_init_signals ();
2060 /* We need a default language for parsing expressions, so simple
2061 things like "set width 0" won't fail if no language is explicitly
2062 set in a config file or implicitly set by reading an executable
2064 set_language (language_c);
2065 expected_language = current_language; /* Don't warn about the change. */
2067 /* Python initialization, for example, can require various commands to be
2068 installed. For example "info pretty-printer" needs the "info"
2069 prefix to be installed. Keep things simple and just do final
2070 script initialization here. */
2071 finish_ext_lang_initialization ();