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"
81 extern void initialize_all_files (void);
83 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
84 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
85 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
87 /* Default command line prompt. This is overriden in some configs. */
89 #ifndef DEFAULT_PROMPT
90 #define DEFAULT_PROMPT "(gdb) "
93 /* Generate a function that exports a pointer to a field of the
96 #define gen_ret_current_ui_field_ptr(type, name) \
98 current_ui_## name ## _ptr (void) \
100 return ¤t_ui->m_ ## name; \
103 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdout)
104 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdin)
105 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stderr)
106 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdlog)
107 gen_ret_current_ui_field_ptr (struct ui_out *, current_uiout)
109 /* Initialization file name for gdb. This is host-dependent. */
111 const char gdbinit[] = GDBINIT;
113 int inhibit_gdbinit = 0;
115 extern char lang_frame_mismatch_warn[]; /* language.c */
117 /* Flag for whether we want to confirm potentially dangerous
118 operations. Default is yes. */
123 show_confirm (struct ui_file *file, int from_tty,
124 struct cmd_list_element *c, const char *value)
126 fprintf_filtered (file, _("Whether to confirm potentially "
127 "dangerous operations is %s.\n"),
131 /* Flag to indicate whether a user defined command is currently running. */
135 /* Current working directory. */
137 char *current_directory;
139 /* The directory name is actually stored here (usually). */
140 char gdb_dirbuf[1024];
142 /* The last command line executed on the console. Used for command
144 char *saved_command_line;
146 /* Nonzero if the current command is modified by "server ". This
147 affects things like recording into the command history, commands
148 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
149 whatever) can issue its own commands and also send along commands
150 from the user, and have the user not notice that the user interface
151 is issuing commands too. */
154 /* Timeout limit for response from target. */
156 /* The default value has been changed many times over the years. It
157 was originally 5 seconds. But that was thought to be a long time
158 to sit and wait, so it was changed to 2 seconds. That was thought
159 to be plenty unless the connection was going through some terminal
160 server or multiplexer or other form of hairy serial connection.
162 In mid-1996, remote_timeout was moved from remote.c to top.c and
163 it began being used in other remote-* targets. It appears that the
164 default was changed to 20 seconds at that time, perhaps because the
165 Renesas E7000 ICE didn't always respond in a timely manner.
167 But if 5 seconds is a long time to sit and wait for retransmissions,
168 20 seconds is far worse. This demonstrates the difficulty of using
169 a single variable for all protocol timeouts.
171 As remote.c is used much more than remote-e7000.c, it was changed
172 back to 2 seconds in 1999. */
174 int remote_timeout = 2;
176 /* Non-zero tells remote* modules to output debugging info. */
178 int remote_debug = 0;
180 /* Sbrk location on entry to main. Used for statistics only. */
185 /* Hooks for alternate command interfaces. */
187 /* This hook is called from within gdb's many mini-event loops which
188 could steal control from a real user interface's event loop. It
189 returns non-zero if the user is requesting a detach, zero
192 int (*deprecated_ui_loop_hook) (int);
195 /* Called from print_frame_info to list the line we stopped in. */
197 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
201 /* Replaces most of query. */
203 int (*deprecated_query_hook) (const char *, va_list);
205 /* Replaces most of warning. */
207 void (*deprecated_warning_hook) (const char *, va_list);
209 /* These three functions support getting lines of text from the user.
210 They are used in sequence. First deprecated_readline_begin_hook is
211 called with a text string that might be (for example) a message for
212 the user to type in a sequence of commands to be executed at a
213 breakpoint. If this function calls back to a GUI, it might take
214 this opportunity to pop up a text interaction window with this
215 message. Next, deprecated_readline_hook is called with a prompt
216 that is emitted prior to collecting the user input. It can be
217 called multiple times. Finally, deprecated_readline_end_hook is
218 called to notify the GUI that we are done with the interaction
219 window and it can close it. */
221 void (*deprecated_readline_begin_hook) (char *, ...);
222 char *(*deprecated_readline_hook) (const char *);
223 void (*deprecated_readline_end_hook) (void);
225 /* Called as appropriate to notify the interface that we have attached
226 to or detached from an already running process. */
228 void (*deprecated_attach_hook) (void);
229 void (*deprecated_detach_hook) (void);
231 /* Called during long calculations to allow GUI to repair window
232 damage, and to check for stop buttons, etc... */
234 void (*deprecated_interactive_hook) (void);
236 /* Called when going to wait for the target. Usually allows the GUI
237 to run while waiting for target events. */
239 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
240 struct target_waitstatus *status,
243 /* Used by UI as a wrapper around command execution. May do various
244 things like enabling/disabling buttons, etc... */
246 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
247 char *cmd, int from_tty);
249 /* Called when the current thread changes. Argument is thread id. */
251 void (*deprecated_context_hook) (int id);
253 /* The highest UI number ever assigned. */
254 static int highest_ui_num;
259 new_ui (FILE *instream, FILE *outstream, FILE *errstream)
263 ui = XCNEW (struct ui);
265 ui->num = ++highest_ui_num;
266 ui->stdin_stream = instream;
267 ui->instream = instream;
268 ui->outstream = outstream;
269 ui->errstream = errstream;
271 ui->input_fd = fileno (ui->instream);
273 ui->input_interactive_p = ISATTY (ui->instream);
275 ui->m_gdb_stdin = stdio_fileopen (ui->instream);
276 ui->m_gdb_stdout = stdio_fileopen (ui->outstream);
277 ui->m_gdb_stderr = stderr_fileopen (ui->errstream);
278 ui->m_gdb_stdlog = ui->m_gdb_stderr;
280 ui->prompt_state = PROMPT_NEEDED;
288 for (last = ui_list; last->next != NULL; last = last->next)
297 free_ui (struct ui *ui)
299 ui_file_delete (ui->m_gdb_stdin);
300 ui_file_delete (ui->m_gdb_stdout);
301 ui_file_delete (ui->m_gdb_stderr);
307 delete_ui (struct ui *todel)
309 struct ui *ui, *uiprev;
313 for (ui = ui_list; ui != NULL; uiprev = ui, ui = ui->next)
317 gdb_assert (ui != NULL);
320 uiprev->next = ui->next;
327 /* Open file named NAME for read/write, making sure not to make it the
328 controlling terminal. */
331 open_terminal_stream (const char *name)
335 fd = open (name, O_RDWR | O_NOCTTY);
337 perror_with_name (_("opening terminal failed"));
339 return fdopen (fd, "w+");
342 /* Implementation of the "new-ui" command. */
345 new_ui_command (char *args, int from_tty)
348 struct interp *interp;
349 FILE *stream[3] = { NULL, NULL, NULL };
354 const char *interpreter_name;
355 const char *tty_name;
356 struct cleanup *back_to;
357 struct cleanup *streams_chain;
361 argv = gdb_buildargv (args);
362 back_to = make_cleanup_freeargv (argv);
363 argc = countargv (argv);
366 error (_("usage: new-ui <interpreter> <tty>"));
368 interpreter_name = argv[0];
371 streams_chain = make_cleanup (null_cleanup, NULL);
373 /* Open specified terminal, once for each of
374 stdin/stdout/stderr. */
375 for (i = 0; i < 3; i++)
377 stream[i] = open_terminal_stream (tty_name);
378 make_cleanup_fclose (stream[i]);
381 ui = new_ui (stream[0], stream[1], stream[2]);
383 discard_cleanups (streams_chain);
387 make_cleanup (restore_ui_cleanup, current_ui);
390 set_top_level_interpreter (interpreter_name);
392 interp_pre_command_loop (top_level_interpreter ());
394 /* This restores the previous UI. */
395 do_cleanups (back_to);
397 printf_unfiltered ("New UI allocated\n");
400 /* Handler for SIGHUP. */
403 /* NOTE 1999-04-29: This function will be static again, once we modify
404 gdb to use the event loop as the default command loop and we merge
405 event-top.c into this file, top.c. */
409 /* Stop asking user for confirmation --- we're exiting. This
410 prevents asking the user dumb questions. */
412 quit_command ((char *) 0, 0);
414 #endif /* defined SIGHUP */
416 /* Line number we are currently in, in a file which is being sourced. */
417 /* NOTE 1999-04-29: This variable will be static again, once we modify
418 gdb to use the event loop as the default command loop and we merge
419 event-top.c into this file, top.c. */
420 /* static */ int source_line_number;
422 /* Name of the file we are sourcing. */
423 /* NOTE 1999-04-29: This variable will be static again, once we modify
424 gdb to use the event loop as the default command loop and we merge
425 event-top.c into this file, top.c. */
426 /* static */ const char *source_file_name;
428 /* Clean up on error during a "source" command (or execution of a
429 user-defined command). */
432 do_restore_instream_cleanup (void *stream)
434 struct ui *ui = current_ui;
436 /* Restore the previous input stream. */
437 ui->instream = (FILE *) stream;
440 /* Read commands from STREAM. */
442 read_command_file (FILE *stream)
444 struct ui *ui = current_ui;
445 struct cleanup *cleanups;
447 cleanups = make_cleanup (do_restore_instream_cleanup, ui->instream);
448 ui->instream = stream;
450 /* Read commands from `instream' and execute them until end of file
451 or error reading instream. */
453 while (ui->instream != NULL && !feof (ui->instream))
457 /* Get a command-line. This calls the readline package. */
458 command = command_line_input (NULL, 0, NULL);
461 command_handler (command);
464 do_cleanups (cleanups);
467 void (*pre_init_ui_hook) (void);
471 do_chdir_cleanup (void *old_dir)
479 prepare_execute_command (void)
482 struct cleanup *cleanup;
484 mark = value_mark ();
485 cleanup = make_cleanup_value_free_to_mark (mark);
487 /* With multiple threads running while the one we're examining is
488 stopped, the dcache can get stale without us being able to detect
489 it. For the duration of the command, though, use the dcache to
490 help things like backtrace. */
492 target_dcache_invalidate ();
497 /* Tell the user if the language has changed (except first time) after
498 executing a command. */
501 check_frame_language_change (void)
503 static int warned = 0;
504 struct frame_info *frame;
506 /* First make sure that a new frame has been selected, in case the
507 command or the hooks changed the program state. */
508 frame = deprecated_safe_get_selected_frame ();
509 if (current_language != expected_language)
511 if (language_mode == language_mode_auto && info_verbose)
513 language_info (1); /* Print what changed. */
518 /* Warn the user if the working language does not match the language
519 of the current frame. Only warn the user if we are actually
520 running the program, i.e. there is a stack. */
521 /* FIXME: This should be cacheing the frame and only running when
522 the frame changes. */
524 if (has_stack_frames ())
528 flang = get_frame_language (frame);
530 && flang != language_unknown
531 && flang != current_language->la_language)
533 printf_filtered ("%s\n", lang_frame_mismatch_warn);
542 wait_sync_command_done (void)
544 while (gdb_do_one_event () >= 0)
545 if (current_ui->prompt_state != PROMPT_BLOCKED)
552 maybe_wait_sync_command_done (int was_sync)
554 /* If the interpreter is in sync mode (we're running a user
555 command's list, running command hooks or similars), and we
556 just ran a synchronous command that started the target, wait
557 for that command to end. */
558 if (!current_ui->async
560 && current_ui->prompt_state == PROMPT_BLOCKED)
561 wait_sync_command_done ();
564 /* Execute the line P as a command, in the current user context.
565 Pass FROM_TTY as second argument to the defining function. */
568 execute_command (char *p, int from_tty)
570 struct cleanup *cleanup_if_error, *cleanup;
571 struct cmd_list_element *c;
574 cleanup_if_error = make_bpstat_clear_actions_cleanup ();
575 cleanup = prepare_execute_command ();
577 /* Force cleanup of any alloca areas if using C alloca instead of
581 /* This can happen when command_line_input hits end of file. */
584 do_cleanups (cleanup);
585 discard_cleanups (cleanup_if_error);
589 target_log_command (p);
591 while (*p == ' ' || *p == '\t')
597 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
601 /* If trace-commands is set then this will print this command. */
602 print_command_trace (p);
604 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
607 /* Pass null arg rather than an empty one. */
610 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
611 while the is_complete_command(cfunc) test is just plain
612 bogus. They should both be replaced by a test of the form
613 c->strip_trailing_white_space_p. */
614 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
615 can't be replaced with func. This is because it is the
616 cfunc, and not the func, that has the value that the
617 is_complete_command hack is testing for. */
618 /* Clear off trailing whitespace, except for set and complete
621 && c->type != set_cmd
622 && !is_complete_command (c))
624 p = arg + strlen (arg) - 1;
625 while (p >= arg && (*p == ' ' || *p == '\t'))
630 /* If this command has been pre-hooked, run the hook first. */
631 execute_cmd_pre_hook (c);
633 if (c->deprecated_warn_user)
634 deprecated_cmd_warning (line);
636 /* c->user_commands would be NULL in the case of a python command. */
637 if (c->theclass == class_user && c->user_commands)
638 execute_user_command (c, arg);
639 else if (c->type == set_cmd)
640 do_set_command (arg, from_tty, c);
641 else if (c->type == show_cmd)
642 do_show_command (arg, from_tty, c);
643 else if (!cmd_func_p (c))
644 error (_("That is not a command, just a help topic."));
645 else if (deprecated_call_command_hook)
646 deprecated_call_command_hook (c, arg, from_tty);
648 cmd_func (c, arg, from_tty);
650 maybe_wait_sync_command_done (was_sync);
652 /* If this command has been post-hooked, run the hook last. */
653 execute_cmd_post_hook (c);
657 check_frame_language_change ();
659 do_cleanups (cleanup);
660 discard_cleanups (cleanup_if_error);
663 /* Run execute_command for P and FROM_TTY. Capture its output into the
664 returned string, do not display it to the screen. BATCH_FLAG will be
665 temporarily set to true. */
668 execute_command_to_string (char *p, int from_tty)
670 struct ui_file *str_file;
671 struct cleanup *cleanup;
674 /* GDB_STDOUT should be better already restored during these
675 restoration callbacks. */
676 cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
678 make_cleanup_restore_integer (¤t_ui->async);
679 current_ui->async = 0;
681 str_file = mem_fileopen ();
683 make_cleanup_ui_file_delete (str_file);
684 make_cleanup_restore_ui_file (&gdb_stdout);
685 make_cleanup_restore_ui_file (&gdb_stderr);
686 make_cleanup_restore_ui_file (&gdb_stdlog);
687 make_cleanup_restore_ui_file (&gdb_stdtarg);
688 make_cleanup_restore_ui_file (&gdb_stdtargerr);
690 if (ui_out_redirect (current_uiout, str_file) < 0)
691 warning (_("Current output protocol does not support redirection"));
693 make_cleanup_ui_out_redirect_pop (current_uiout);
695 gdb_stdout = str_file;
696 gdb_stderr = str_file;
697 gdb_stdlog = str_file;
698 gdb_stdtarg = str_file;
699 gdb_stdtargerr = str_file;
701 execute_command (p, from_tty);
703 retval = ui_file_xstrdup (str_file, NULL);
705 do_cleanups (cleanup);
711 /* When nonzero, cause dont_repeat to do nothing. This should only be
712 set via prevent_dont_repeat. */
714 static int suppress_dont_repeat = 0;
716 /* Commands call this if they do not want to be repeated by null lines. */
721 struct ui *ui = current_ui;
723 if (suppress_dont_repeat || server_command)
726 /* If we aren't reading from standard input, we are saving the last
727 thing read from stdin in line and don't want to delete it. Null
728 lines won't repeat here in any case. */
729 if (ui->instream == ui->stdin_stream)
730 *saved_command_line = 0;
733 /* Prevent dont_repeat from working, and return a cleanup that
734 restores the previous state. */
737 prevent_dont_repeat (void)
739 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
741 suppress_dont_repeat = 1;
746 /* Read a line from the stream "instream" without command line editing.
748 It prints PROMPT once at the start.
749 Action is compatible with "readline", e.g. space for the result is
750 malloc'd and should be freed by the caller.
752 A NULL return means end of file. */
755 gdb_readline_no_editing (const char *prompt)
757 struct buffer line_buffer;
758 struct ui *ui = current_ui;
759 /* Read from stdin if we are executing a user defined command. This
760 is the right thing for prompt_for_continue, at least. */
761 FILE *stream = ui->instream != NULL ? ui->instream : stdin;
762 int fd = fileno (stream);
764 buffer_init (&line_buffer);
768 /* Don't use a _filtered function here. It causes the assumed
769 character position to be off, since the newline we read from
770 the user is not accounted for. */
771 fputs_unfiltered (prompt, gdb_stdout);
772 gdb_flush (gdb_stdout);
783 /* Wait until at least one byte of data is available. Control-C
784 can interrupt interruptible_select, but not fgetc. */
786 FD_SET (fd, &readfds);
787 if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
791 /* If this was ctrl-c, the QUIT above handles it. */
794 perror_with_name (("select"));
801 if (line_buffer.used_size > 0)
802 /* The last line does not end with a newline. Return it, and
803 if we are called again fgetc will still return EOF and
804 we'll return NULL then. */
806 xfree (buffer_finish (&line_buffer));
812 if (line_buffer.used_size > 0
813 && line_buffer.buffer[line_buffer.used_size - 1] == '\r')
814 line_buffer.used_size--;
818 buffer_grow_char (&line_buffer, c);
821 buffer_grow_char (&line_buffer, '\0');
822 return buffer_finish (&line_buffer);
825 /* Variables which control command line editing and history
826 substitution. These variables are given default values at the end
828 static int command_editing_p;
830 /* NOTE 1999-04-29: This variable will be static again, once we modify
831 gdb to use the event loop as the default command loop and we merge
832 event-top.c into this file, top.c. */
834 /* static */ int history_expansion_p;
836 static int write_history_p;
838 show_write_history_p (struct ui_file *file, int from_tty,
839 struct cmd_list_element *c, const char *value)
841 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
845 /* The variable associated with the "set/show history size"
846 command. The value -1 means unlimited, and -2 means undefined. */
847 static int history_size_setshow_var = -2;
850 show_history_size (struct ui_file *file, int from_tty,
851 struct cmd_list_element *c, const char *value)
853 fprintf_filtered (file, _("The size of the command history is %s.\n"),
857 /* Variable associated with the "history remove-duplicates" option.
858 The value -1 means unlimited. */
859 static int history_remove_duplicates = 0;
862 show_history_remove_duplicates (struct ui_file *file, int from_tty,
863 struct cmd_list_element *c, const char *value)
865 fprintf_filtered (file,
866 _("The number of history entries to look back at for "
867 "duplicates is %s.\n"),
871 static char *history_filename;
873 show_history_filename (struct ui_file *file, int from_tty,
874 struct cmd_list_element *c, const char *value)
876 fprintf_filtered (file, _("The filename in which to record "
877 "the command history is \"%s\".\n"),
881 /* This is like readline(), but it has some gdb-specific behavior.
882 gdb may want readline in both the synchronous and async modes during
883 a single gdb invocation. At the ordinary top-level prompt we might
884 be using the async readline. That means we can't use
885 rl_pre_input_hook, since it doesn't work properly in async mode.
886 However, for a secondary prompt (" >", such as occurs during a
887 `define'), gdb wants a synchronous response.
889 We used to call readline() directly, running it in synchronous
890 mode. But mixing modes this way is not supported, and as of
891 readline 5.x it no longer works; the arrow keys come unbound during
892 the synchronous call. So we make a nested call into the event
893 loop. That's what gdb_readline_wrapper is for. */
895 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
896 rely on gdb_readline_wrapper_result, which might still be NULL if
897 the user types Control-D for EOF. */
898 static int gdb_readline_wrapper_done;
900 /* The result of the current call to gdb_readline_wrapper, once a newline
902 static char *gdb_readline_wrapper_result;
904 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
905 to be called after the newline is processed (which will redisplay
906 the prompt). But in gdb_readline_wrapper we will not get a new
907 prompt until the next call, or until we return to the event loop.
908 So we disable this hook around the newline and restore it before we
910 static void (*saved_after_char_processing_hook) (void);
916 gdb_in_secondary_prompt_p (struct ui *ui)
918 return ui->secondary_prompt_depth > 0;
922 /* This function is called when readline has seen a complete line of
926 gdb_readline_wrapper_line (char *line)
928 gdb_assert (!gdb_readline_wrapper_done);
929 gdb_readline_wrapper_result = line;
930 gdb_readline_wrapper_done = 1;
932 /* Prevent operate-and-get-next from acting too early. */
933 saved_after_char_processing_hook = after_char_processing_hook;
934 after_char_processing_hook = NULL;
936 /* Prevent parts of the prompt from being redisplayed if annotations
937 are enabled, and readline's state getting out of sync. We'll
938 reinstall the callback handler, which puts the terminal in raw
939 mode (or in readline lingo, in prepped state), when we're next
940 ready to process user input, either in display_gdb_prompt, or if
941 we're handling an asynchronous target event and running in the
942 background, just before returning to the event loop to process
943 further input (or more target events). */
944 if (current_ui->command_editing)
945 gdb_rl_callback_handler_remove ();
948 struct gdb_readline_wrapper_cleanup
950 void (*handler_orig) (char *);
951 int already_prompted_orig;
953 /* Whether the target was async. */
954 int target_is_async_orig;
958 gdb_readline_wrapper_cleanup (void *arg)
960 struct ui *ui = current_ui;
961 struct gdb_readline_wrapper_cleanup *cleanup
962 = (struct gdb_readline_wrapper_cleanup *) arg;
964 if (ui->command_editing)
965 rl_already_prompted = cleanup->already_prompted_orig;
967 gdb_assert (ui->input_handler == gdb_readline_wrapper_line);
968 ui->input_handler = cleanup->handler_orig;
970 /* Don't restore our input handler in readline yet. That would make
971 readline prep the terminal (putting it in raw mode), while the
972 line we just read may trigger execution of a command that expects
973 the terminal in the default cooked/canonical mode, such as e.g.,
974 running Python's interactive online help utility. See
975 gdb_readline_wrapper_line for when we'll reinstall it. */
977 gdb_readline_wrapper_result = NULL;
978 gdb_readline_wrapper_done = 0;
979 ui->secondary_prompt_depth--;
980 gdb_assert (ui->secondary_prompt_depth >= 0);
982 after_char_processing_hook = saved_after_char_processing_hook;
983 saved_after_char_processing_hook = NULL;
985 if (cleanup->target_is_async_orig)
992 gdb_readline_wrapper (const char *prompt)
994 struct ui *ui = current_ui;
995 struct cleanup *back_to;
996 struct gdb_readline_wrapper_cleanup *cleanup;
999 cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
1000 cleanup->handler_orig = ui->input_handler;
1001 ui->input_handler = gdb_readline_wrapper_line;
1003 if (ui->command_editing)
1004 cleanup->already_prompted_orig = rl_already_prompted;
1006 cleanup->already_prompted_orig = 0;
1008 cleanup->target_is_async_orig = target_is_async_p ();
1010 ui->secondary_prompt_depth++;
1011 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
1013 if (cleanup->target_is_async_orig)
1016 /* Display our prompt and prevent double prompt display. */
1017 display_gdb_prompt (prompt);
1018 if (ui->command_editing)
1019 rl_already_prompted = 1;
1021 if (after_char_processing_hook)
1022 (*after_char_processing_hook) ();
1023 gdb_assert (after_char_processing_hook == NULL);
1025 while (gdb_do_one_event () >= 0)
1026 if (gdb_readline_wrapper_done)
1029 retval = gdb_readline_wrapper_result;
1030 do_cleanups (back_to);
1035 /* The current saved history number from operate-and-get-next.
1036 This is -1 if not valid. */
1037 static int operate_saved_history = -1;
1039 /* This is put on the appropriate hook and helps operate-and-get-next
1042 gdb_rl_operate_and_get_next_completion (void)
1044 int delta = where_history () - operate_saved_history;
1046 /* The `key' argument to rl_get_previous_history is ignored. */
1047 rl_get_previous_history (delta, 0);
1048 operate_saved_history = -1;
1050 /* readline doesn't automatically update the display for us. */
1053 after_char_processing_hook = NULL;
1054 rl_pre_input_hook = NULL;
1057 /* This is a gdb-local readline command handler. It accepts the
1058 current command line (like RET does) and, if this command was taken
1059 from the history, arranges for the next command in the history to
1060 appear on the command line when the prompt returns.
1061 We ignore the arguments. */
1063 gdb_rl_operate_and_get_next (int count, int key)
1067 /* Use the async hook. */
1068 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
1070 /* Find the current line, and find the next line to use. */
1071 where = where_history();
1073 if ((history_is_stifled () && (history_length >= history_max_entries))
1074 || (where >= history_length - 1))
1075 operate_saved_history = where;
1077 operate_saved_history = where + 1;
1079 return rl_newline (1, key);
1082 /* Number of user commands executed during this session. */
1084 static int command_count = 0;
1086 /* Add the user command COMMAND to the input history list. */
1089 gdb_add_history (const char *command)
1093 if (history_remove_duplicates != 0)
1096 int lookbehind_threshold;
1098 /* The lookbehind threshold for finding a duplicate history entry is
1099 bounded by command_count because we can't meaningfully delete
1100 history entries that are already stored in the history file since
1101 the history file is appended to. */
1102 if (history_remove_duplicates == -1
1103 || history_remove_duplicates > command_count)
1104 lookbehind_threshold = command_count;
1106 lookbehind_threshold = history_remove_duplicates;
1109 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
1111 HIST_ENTRY *temp = previous_history ();
1116 if (strcmp (temp->line, command) == 0)
1118 HIST_ENTRY *prev = remove_history (where_history ());
1120 free_history_entry (prev);
1127 add_history (command);
1130 /* Safely append new history entries to the history file in a corruption-free
1131 way using an intermediate local history file. */
1134 gdb_safe_append_history (void)
1136 int ret, saved_errno;
1137 char *local_history_filename;
1138 struct cleanup *old_chain;
1140 local_history_filename
1141 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
1142 old_chain = make_cleanup (xfree, local_history_filename);
1144 ret = rename (history_filename, local_history_filename);
1145 saved_errno = errno;
1146 if (ret < 0 && saved_errno != ENOENT)
1148 warning (_("Could not rename %s to %s: %s"),
1149 history_filename, local_history_filename,
1150 safe_strerror (saved_errno));
1156 /* If the rename failed with ENOENT then either the global history
1157 file never existed in the first place or another GDB process is
1158 currently appending to it (and has thus temporarily renamed it).
1159 Since we can't distinguish between these two cases, we have to
1160 conservatively assume the first case and therefore must write out
1161 (not append) our known history to our local history file and try
1162 to move it back anyway. Otherwise a global history file would
1163 never get created! */
1164 gdb_assert (saved_errno == ENOENT);
1165 write_history (local_history_filename);
1169 append_history (command_count, local_history_filename);
1170 if (history_is_stifled ())
1171 history_truncate_file (local_history_filename, history_max_entries);
1174 ret = rename (local_history_filename, history_filename);
1175 saved_errno = errno;
1176 if (ret < 0 && saved_errno != EEXIST)
1177 warning (_("Could not rename %s to %s: %s"),
1178 local_history_filename, history_filename,
1179 safe_strerror (saved_errno));
1182 do_cleanups (old_chain);
1185 /* Read one line from the command input stream `instream' into a local
1186 static buffer. The buffer is made bigger as necessary. Returns
1187 the address of the start of the line.
1189 NULL is returned for end of file.
1191 *If* input is from an interactive stream (stdin), the line read is
1192 copied into the global 'saved_command_line' so that it can be
1195 This routine either uses fancy command line editing or simple input
1196 as the user has requested. */
1199 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1201 static struct buffer cmd_line_buffer;
1202 static int cmd_line_buffer_initialized;
1203 struct ui *ui = current_ui;
1204 const char *prompt = prompt_arg;
1206 int from_tty = ui->instream == ui->stdin_stream;
1208 /* The annotation suffix must be non-NULL. */
1209 if (annotation_suffix == NULL)
1210 annotation_suffix = "";
1212 if (from_tty && annotation_level > 1)
1217 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1218 + strlen (annotation_suffix) + 40);
1220 local_prompt[0] = '\0';
1222 strcpy (local_prompt, prompt);
1223 strcat (local_prompt, "\n\032\032");
1224 strcat (local_prompt, annotation_suffix);
1225 strcat (local_prompt, "\n");
1227 prompt = local_prompt;
1230 if (!cmd_line_buffer_initialized)
1232 buffer_init (&cmd_line_buffer);
1233 cmd_line_buffer_initialized = 1;
1236 /* Starting a new command line. */
1237 cmd_line_buffer.used_size = 0;
1241 signal (STOP_SIGNAL, handle_stop_sig);
1248 /* Make sure that all output has been output. Some machines may
1249 let you get away with leaving out some of the gdb_flush, but
1252 gdb_flush (gdb_stdout);
1253 gdb_flush (gdb_stderr);
1255 if (source_file_name != NULL)
1256 ++source_line_number;
1258 if (from_tty && annotation_level > 1)
1260 puts_unfiltered ("\n\032\032pre-");
1261 puts_unfiltered (annotation_suffix);
1262 puts_unfiltered ("\n");
1265 /* Don't use fancy stuff if not talking to stdin. */
1266 if (deprecated_readline_hook
1268 && input_interactive_p (current_ui))
1270 rl = (*deprecated_readline_hook) (prompt);
1272 else if (command_editing_p
1274 && input_interactive_p (current_ui))
1276 rl = gdb_readline_wrapper (prompt);
1280 rl = gdb_readline_no_editing (prompt);
1283 cmd = handle_line_of_input (&cmd_line_buffer, rl,
1284 repeat, annotation_suffix);
1285 if (cmd == (char *) EOF)
1298 signal (STOP_SIGNAL, SIG_DFL);
1304 /* Print the GDB banner. */
1306 print_gdb_version (struct ui_file *stream)
1308 /* From GNU coding standards, first line is meant to be easy for a
1309 program to parse, and is just canonical program name and version
1310 number, which starts after last space. */
1312 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1314 /* Second line is a copyright notice. */
1316 fprintf_filtered (stream,
1317 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1319 /* Following the copyright is a brief statement that the program is
1320 free software, that users are free to copy and change it on
1321 certain conditions, that it is covered by the GNU GPL, and that
1322 there is no warranty. */
1324 fprintf_filtered (stream, "\
1325 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1326 \nThis is free software: you are free to change and redistribute it.\n\
1327 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1328 and \"show warranty\" for details.\n");
1330 /* After the required info we print the configuration information. */
1332 fprintf_filtered (stream, "This GDB was configured as \"");
1333 if (strcmp (host_name, target_name) != 0)
1335 fprintf_filtered (stream, "--host=%s --target=%s",
1336 host_name, target_name);
1340 fprintf_filtered (stream, "%s", host_name);
1342 fprintf_filtered (stream, "\".\n\
1343 Type \"show configuration\" for configuration details.");
1345 if (REPORT_BUGS_TO[0])
1347 fprintf_filtered (stream,
1348 _("\nFor bug reporting instructions, please see:\n"));
1349 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1351 fprintf_filtered (stream,
1352 _("Find the GDB manual and other documentation \
1353 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1354 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1355 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1356 commands related to \"word\"."));
1359 /* Print the details of GDB build-time configuration. */
1361 print_gdb_configuration (struct ui_file *stream)
1363 fprintf_filtered (stream, _("\
1364 This GDB was configured as follows:\n\
1365 configure --host=%s --target=%s\n\
1366 "), host_name, target_name);
1367 fprintf_filtered (stream, _("\
1368 --with-auto-load-dir=%s\n\
1369 --with-auto-load-safe-path=%s\n\
1370 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1372 fprintf_filtered (stream, _("\
1376 fprintf_filtered (stream, _("\
1381 fprintf_filtered (stream, _("\
1382 --with-gdb-datadir=%s%s\n\
1383 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1385 fprintf_filtered (stream, _("\
1386 --with-iconv-bin=%s%s\n\
1387 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1389 if (JIT_READER_DIR[0])
1390 fprintf_filtered (stream, _("\
1391 --with-jit-reader-dir=%s%s\n\
1392 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1393 #if HAVE_LIBUNWIND_IA64_H
1394 fprintf_filtered (stream, _("\
1395 --with-libunwind-ia64\n\
1398 fprintf_filtered (stream, _("\
1399 --without-libunwind-ia64\n\
1403 fprintf_filtered (stream, _("\
1407 fprintf_filtered (stream, _("\
1411 #ifdef WITH_PYTHON_PATH
1412 fprintf_filtered (stream, _("\
1413 --with-python=%s%s\n\
1414 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1417 fprintf_filtered (stream, _("\
1421 fprintf_filtered (stream, _("\
1426 fprintf_filtered (stream, _("\
1427 --with-relocated-sources=%s\n\
1431 fprintf_filtered (stream, _("\
1432 --with-separate-debug-dir=%s%s\n\
1433 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1434 if (TARGET_SYSTEM_ROOT[0])
1435 fprintf_filtered (stream, _("\
1436 --with-sysroot=%s%s\n\
1437 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1438 if (SYSTEM_GDBINIT[0])
1439 fprintf_filtered (stream, _("\
1440 --with-system-gdbinit=%s%s\n\
1441 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1442 #if HAVE_LIBBABELTRACE
1443 fprintf_filtered (stream, _("\
1444 --with-babeltrace\n\
1447 fprintf_filtered (stream, _("\
1448 --without-babeltrace\n\
1451 /* We assume "relocatable" will be printed at least once, thus we always
1452 print this text. It's a reasonably safe assumption for now. */
1453 fprintf_filtered (stream, _("\n\
1454 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1455 tree, and GDB will still find it.)\n\
1460 /* The current top level prompt, settable with "set prompt", and/or
1461 with the python `gdb.prompt_hook' hook. */
1462 static char *top_prompt;
1464 /* Access method for the GDB prompt string. */
1472 /* Set method for the GDB prompt string. */
1475 set_prompt (const char *s)
1477 char *p = xstrdup (s);
1490 /* Callback for iterate_over_inferiors. Kills or detaches the given
1491 inferior, depending on how we originally gained control of it. */
1494 kill_or_detach (struct inferior *inf, void *args)
1496 struct qt_args *qt = (struct qt_args *) args;
1497 struct thread_info *thread;
1502 thread = any_thread_of_process (inf->pid);
1505 switch_to_thread (thread->ptid);
1507 /* Leave core files alone. */
1508 if (target_has_execution)
1510 if (inf->attach_flag)
1511 target_detach (qt->args, qt->from_tty);
1520 /* Callback for iterate_over_inferiors. Prints info about what GDB
1521 will do to each inferior on a "quit". ARG points to a struct
1522 ui_out where output is to be collected. */
1525 print_inferior_quit_action (struct inferior *inf, void *arg)
1527 struct ui_file *stb = (struct ui_file *) arg;
1532 if (inf->attach_flag)
1533 fprintf_filtered (stb,
1534 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1535 target_pid_to_str (pid_to_ptid (inf->pid)));
1537 fprintf_filtered (stb,
1538 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1539 target_pid_to_str (pid_to_ptid (inf->pid)));
1544 /* If necessary, make the user confirm that we should quit. Return
1545 non-zero if we should quit, zero if we shouldn't. */
1550 struct ui_file *stb;
1551 struct cleanup *old_chain;
1555 /* Don't even ask if we're only debugging a core file inferior. */
1556 if (!have_live_inferiors ())
1559 /* Build the query string as a single string. */
1560 stb = mem_fileopen ();
1561 old_chain = make_cleanup_ui_file_delete (stb);
1563 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1564 iterate_over_inferiors (print_inferior_quit_action, stb);
1565 fprintf_filtered (stb, _("\nQuit anyway? "));
1567 str = ui_file_xstrdup (stb, NULL);
1568 make_cleanup (xfree, str);
1570 qr = query ("%s", str);
1571 do_cleanups (old_chain);
1575 /* Prepare to exit GDB cleanly by undoing any changes made to the
1576 terminal so that we leave the terminal in the state we acquired it. */
1579 undo_terminal_modifications_before_exit (void)
1581 struct ui *saved_top_level = current_ui;
1583 target_terminal_ours ();
1585 current_ui = main_ui;
1590 gdb_disable_readline ();
1592 current_ui = saved_top_level;
1596 /* Quit without asking for confirmation. */
1599 quit_force (char *args, int from_tty)
1604 undo_terminal_modifications_before_exit ();
1606 /* An optional expression may be used to cause gdb to terminate with the
1607 value of that expression. */
1610 struct value *val = parse_and_eval (args);
1612 exit_code = (int) value_as_long (val);
1614 else if (return_child_result)
1615 exit_code = return_child_result_value;
1618 qt.from_tty = from_tty;
1620 /* We want to handle any quit errors and exit regardless. */
1622 /* Get out of tfind mode, and kill or detach all inferiors. */
1625 disconnect_tracing ();
1626 iterate_over_inferiors (kill_or_detach, &qt);
1628 CATCH (ex, RETURN_MASK_ALL)
1630 exception_print (gdb_stderr, ex);
1634 /* Give all pushed targets a chance to do minimal cleanup, and pop
1640 CATCH (ex, RETURN_MASK_ALL)
1642 exception_print (gdb_stderr, ex);
1646 /* Save the history information if it is appropriate to do so. */
1649 if (write_history_p && history_filename)
1654 /* History is currently shared between all UIs. If there's
1655 any UI with a terminal, save history. */
1658 if (input_interactive_p (ui))
1666 gdb_safe_append_history ();
1669 CATCH (ex, RETURN_MASK_ALL)
1671 exception_print (gdb_stderr, ex);
1675 /* Do any final cleanups before exiting. */
1678 do_final_cleanups (all_cleanups ());
1680 CATCH (ex, RETURN_MASK_ALL)
1682 exception_print (gdb_stderr, ex);
1689 /* The value of the "interactive-mode" setting. */
1690 static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO;
1692 /* Implement the "show interactive-mode" option. */
1695 show_interactive_mode (struct ui_file *file, int from_tty,
1696 struct cmd_list_element *c,
1699 if (interactive_mode == AUTO_BOOLEAN_AUTO)
1700 fprintf_filtered (file, "Debugger's interactive mode "
1701 "is %s (currently %s).\n",
1702 value, gdb_has_a_terminal () ? "on" : "off");
1704 fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value);
1707 /* Returns whether GDB is running on an interactive terminal. */
1710 input_interactive_p (struct ui *ui)
1715 if (interactive_mode != AUTO_BOOLEAN_AUTO)
1716 return interactive_mode == AUTO_BOOLEAN_TRUE;
1718 return ui->input_interactive_p;
1722 dont_repeat_command (char *ignored, int from_tty)
1724 /* Can't call dont_repeat here because we're not necessarily reading
1726 *saved_command_line = 0;
1729 /* Functions to manipulate command line editing control variables. */
1731 /* Number of commands to print in each call to show_commands. */
1732 #define Hist_print 10
1734 show_commands (char *args, int from_tty)
1736 /* Index for history commands. Relative to history_base. */
1739 /* Number of the history entry which we are planning to display next.
1740 Relative to history_base. */
1743 /* Print out some of the commands from the command history. */
1747 if (args[0] == '+' && args[1] == '\0')
1748 /* "info editing +" should print from the stored position. */
1751 /* "info editing <exp>" should print around command number <exp>. */
1752 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1754 /* "show commands" means print the last Hist_print commands. */
1757 num = history_length - Hist_print;
1763 /* If there are at least Hist_print commands, we want to display the last
1764 Hist_print rather than, say, the last 6. */
1765 if (history_length - num < Hist_print)
1767 num = history_length - Hist_print;
1773 offset < num + Hist_print && offset < history_length;
1776 printf_filtered ("%5d %s\n", history_base + offset,
1777 (history_get (history_base + offset))->line);
1780 /* The next command we want to display is the next one that we haven't
1784 /* If the user repeats this command with return, it should do what
1785 "show commands +" does. This is unnecessary if arg is null,
1786 because "show commands +" is not useful after "show commands". */
1787 if (from_tty && args)
1794 /* Update the size of our command history file to HISTORY_SIZE.
1796 A HISTORY_SIZE of -1 stands for unlimited. */
1799 set_readline_history_size (int history_size)
1801 gdb_assert (history_size >= -1);
1803 if (history_size == -1)
1804 unstifle_history ();
1806 stifle_history (history_size);
1809 /* Called by do_setshow_command. */
1811 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1813 set_readline_history_size (history_size_setshow_var);
1817 set_history (char *args, int from_tty)
1819 printf_unfiltered (_("\"set history\" must be followed "
1820 "by the name of a history subcommand.\n"));
1821 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1825 show_history (char *args, int from_tty)
1827 cmd_show_list (showhistlist, from_tty, "");
1830 int info_verbose = 0; /* Default verbose msgs off. */
1832 /* Called by do_setshow_command. An elaborate joke. */
1834 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1836 const char *cmdname = "verbose";
1837 struct cmd_list_element *showcmd;
1839 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1840 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1844 c->doc = "Set verbose printing of informational messages.";
1845 showcmd->doc = "Show verbose printing of informational messages.";
1849 c->doc = "Set verbosity.";
1850 showcmd->doc = "Show verbosity.";
1854 /* Init the history buffer. Note that we are called after the init file(s)
1855 have been read so that the user can change the history file via his
1856 .gdbinit file (for instance). The GDBHISTFILE environment variable
1857 overrides all of this. */
1864 tmpenv = getenv ("GDBHISTSIZE");
1871 tmpenv = skip_spaces (tmpenv);
1873 var = strtol (tmpenv, &endptr, 10);
1874 saved_errno = errno;
1875 endptr = skip_spaces (endptr);
1877 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1878 empty string, a negative number or a huge positive number (larger than
1879 INT_MAX) then set the history size to unlimited. Otherwise set our
1880 history size to the number we have read. This behavior is consistent
1881 with how bash handles HISTSIZE. */
1882 if (*endptr != '\0')
1884 else if (*tmpenv == '\0'
1887 /* On targets where INT_MAX == LONG_MAX, we have to look at
1888 errno after calling strtol to distinguish between a value that
1889 is exactly INT_MAX and an overflowing value that was clamped
1891 || (var == INT_MAX && saved_errno == ERANGE))
1892 history_size_setshow_var = -1;
1894 history_size_setshow_var = var;
1897 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1899 if (history_size_setshow_var == -2)
1900 history_size_setshow_var = 256;
1902 set_readline_history_size (history_size_setshow_var);
1904 tmpenv = getenv ("GDBHISTFILE");
1906 history_filename = xstrdup (tmpenv);
1907 else if (!history_filename)
1909 /* We include the current directory so that if the user changes
1910 directories the file written will be the same as the one
1913 /* No leading dots in file names are allowed on MSDOS. */
1914 history_filename = concat (current_directory, "/_gdb_history",
1917 history_filename = concat (current_directory, "/.gdb_history",
1921 read_history (history_filename);
1925 show_prompt (struct ui_file *file, int from_tty,
1926 struct cmd_list_element *c, const char *value)
1928 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1931 /* "set editing" command. */
1934 set_editing (char *args, int from_tty, struct cmd_list_element *c)
1936 change_line_handler (set_editing_cmd_var);
1937 /* Update the control variable so that MI's =cmd-param-changed event
1938 shows the correct value. */
1939 set_editing_cmd_var = current_ui->command_editing;
1943 show_editing (struct ui_file *file, int from_tty,
1944 struct cmd_list_element *c, const char *value)
1946 fprintf_filtered (file, _("Editing of command lines as "
1947 "they are typed is %s.\n"),
1948 current_ui->command_editing ? _("on") : _("off"));
1952 show_annotation_level (struct ui_file *file, int from_tty,
1953 struct cmd_list_element *c, const char *value)
1955 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1959 show_exec_done_display_p (struct ui_file *file, int from_tty,
1960 struct cmd_list_element *c, const char *value)
1962 fprintf_filtered (file, _("Notification of completion for "
1963 "asynchronous execution commands is %s.\n"),
1967 /* New values of the "data-directory" parameter are staged here. */
1968 static char *staged_gdb_datadir;
1970 /* "set" command for the gdb_datadir configuration variable. */
1973 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
1975 set_gdb_data_directory (staged_gdb_datadir);
1976 observer_notify_gdb_datadir_changed ();
1979 /* "show" command for the gdb_datadir configuration variable. */
1982 show_gdb_datadir (struct ui_file *file, int from_tty,
1983 struct cmd_list_element *c, const char *value)
1985 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1990 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
1992 /* We include the current directory so that if the user changes
1993 directories the file written will be the same as the one
1995 if (!IS_ABSOLUTE_PATH (history_filename))
1996 history_filename = reconcat (history_filename, current_directory, "/",
1997 history_filename, (char *) NULL);
2003 struct cmd_list_element *c;
2005 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
2006 the DEFAULT_PROMPT is. */
2007 set_prompt (DEFAULT_PROMPT);
2009 /* Set the important stuff up for command editing. */
2010 command_editing_p = 1;
2011 history_expansion_p = 0;
2012 write_history_p = 0;
2014 /* Setup important stuff for command line editing. */
2015 rl_completion_word_break_hook = gdb_completion_word_break_characters;
2016 rl_completion_entry_function = readline_line_completion_function;
2017 rl_completer_word_break_characters = default_word_break_characters ();
2018 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
2019 rl_completion_display_matches_hook = cli_display_match_list;
2020 rl_readline_name = "gdb";
2021 rl_terminal_name = getenv ("TERM");
2023 /* The name for this defun comes from Bash, where it originated.
2024 15 is Control-o, the same binding this function has in Bash. */
2025 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
2027 add_setshow_string_cmd ("prompt", class_support,
2029 _("Set gdb's prompt"),
2030 _("Show gdb's prompt"),
2033 &setlist, &showlist);
2035 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
2036 Don't repeat this command.\nPrimarily \
2037 used inside of user-defined commands that should not be repeated when\n\
2040 add_setshow_boolean_cmd ("editing", class_support,
2041 &set_editing_cmd_var, _("\
2042 Set editing of command lines as they are typed."), _("\
2043 Show editing of command lines as they are typed."), _("\
2044 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2045 Without an argument, command line editing is enabled. To edit, use\n\
2046 EMACS-like or VI-like commands like control-P or ESC."),
2049 &setlist, &showlist);
2051 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
2052 Set saving of the history record on exit."), _("\
2053 Show saving of the history record on exit."), _("\
2054 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2055 Without an argument, saving is enabled."),
2057 show_write_history_p,
2058 &sethistlist, &showhistlist);
2060 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
2061 &history_size_setshow_var, _("\
2062 Set the size of the command history,"), _("\
2063 Show the size of the command history,"), _("\
2064 ie. the number of previous commands to keep a record of.\n\
2065 If set to \"unlimited\", the number of commands kept in the history\n\
2066 list is unlimited. This defaults to the value of the environment\n\
2067 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2068 set_history_size_command,
2070 &sethistlist, &showhistlist);
2072 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
2073 &history_remove_duplicates, _("\
2074 Set how far back in history to look for and remove duplicate entries."), _("\
2075 Show how far back in history to look for and remove duplicate entries."), _("\
2076 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2077 and remove the first history entry that is a duplicate of the most recent\n\
2078 entry, each time a new history entry is added.\n\
2079 If set to \"unlimited\", this lookbehind is unbounded.\n\
2080 Only history entries added during this session are considered for removal.\n\
2081 If set to 0, removal of duplicate history entries is disabled.\n\
2082 By default this option is set to 0."),
2084 show_history_remove_duplicates,
2085 &sethistlist, &showhistlist);
2087 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
2088 Set the filename in which to record the command history"), _("\
2089 Show the filename in which to record the command history"), _("\
2090 (the list of previous commands of which a record is kept)."),
2091 set_history_filename,
2092 show_history_filename,
2093 &sethistlist, &showhistlist);
2095 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
2096 Set whether to confirm potentially dangerous operations."), _("\
2097 Show whether to confirm potentially dangerous operations."), NULL,
2100 &setlist, &showlist);
2102 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
2103 Set annotation_level."), _("\
2104 Show annotation_level."), _("\
2105 0 == normal; 1 == fullname (for use when running under emacs)\n\
2106 2 == output annotated suitably for use by programs that control GDB."),
2108 show_annotation_level,
2109 &setlist, &showlist);
2111 add_setshow_boolean_cmd ("exec-done-display", class_support,
2112 &exec_done_display_p, _("\
2113 Set notification of completion for asynchronous execution commands."), _("\
2114 Show notification of completion for asynchronous execution commands."), _("\
2115 Use \"on\" to enable the notification, and \"off\" to disable it."),
2117 show_exec_done_display_p,
2118 &setlist, &showlist);
2120 add_setshow_filename_cmd ("data-directory", class_maintenance,
2121 &staged_gdb_datadir, _("Set GDB's data directory."),
2122 _("Show GDB's data directory."),
2124 When set, GDB uses the specified path to search for data files."),
2125 set_gdb_datadir, show_gdb_datadir,
2129 add_setshow_auto_boolean_cmd ("interactive-mode", class_support,
2130 &interactive_mode, _("\
2131 Set whether GDB's standard input is a terminal."), _("\
2132 Show whether GDB's standard input is a terminal."), _("\
2133 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2134 means that GDB should wait for the user to answer queries associated to\n\
2135 commands entered at the command prompt. If off, GDB assumes that standard\n\
2136 input is not a terminal, and uses the default answer to all queries.\n\
2137 If auto (the default), determine which mode to use based on the standard\n\
2140 show_interactive_mode,
2141 &setlist, &showlist);
2143 c = add_cmd ("new-ui", class_support, new_ui_command, _("\
2144 Create a new UI. It takes two arguments:\n\
2145 The first argument is the name of the interpreter to run.\n\
2146 The second argument is the terminal the UI runs on.\n"), &cmdlist);
2147 set_cmd_completer (c, interpreter_completer);
2151 gdb_init (char *argv0)
2153 if (pre_init_ui_hook)
2154 pre_init_ui_hook ();
2156 /* Run the init function of each source file. */
2159 /* Make sure we return to the original directory upon exit, come
2160 what may, since the OS doesn't do that for us. */
2161 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2164 init_cmd_lists (); /* This needs to be done first. */
2165 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2166 initialize_utils (); /* Make errors and warnings possible. */
2170 /* Here is where we call all the _initialize_foo routines. */
2171 initialize_all_files ();
2173 /* This creates the current_program_space. Do this after all the
2174 _initialize_foo routines have had a chance to install their
2175 per-sspace data keys. Also do this before
2176 initialize_current_architecture is called, because it accesses
2177 exec_bfd of the current program space. */
2178 initialize_progspace ();
2179 initialize_inferiors ();
2180 initialize_current_architecture ();
2182 init_main (); /* But that omits this file! Do it now. */
2184 initialize_stdin_serial ();
2186 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2188 set_initial_gdb_ttystate ();
2190 async_init_signals ();
2192 /* We need a default language for parsing expressions, so simple
2193 things like "set width 0" won't fail if no language is explicitly
2194 set in a config file or implicitly set by reading an executable
2196 set_language (language_c);
2197 expected_language = current_language; /* Don't warn about the change. */
2199 /* Python initialization, for example, can require various commands to be
2200 installed. For example "info pretty-printer" needs the "info"
2201 prefix to be installed. Keep things simple and just do final
2202 script initialization here. */
2203 finish_ext_lang_initialization ();