1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "call-cmds.h"
25 #include "cli/cli-cmds.h"
26 #include "cli/cli-script.h"
27 #include "cli/cli-setshow.h"
28 #include "cli/cli-decode.h"
31 #include "exceptions.h"
34 #include "breakpoint.h"
36 #include "expression.h"
39 #include "terminal.h" /* For job_control. */
41 #include "completer.h"
46 #include "gdb_assert.h"
48 #include "event-loop.h"
49 #include "gdbthread.h"
51 /* readline include files */
52 #include "readline/readline.h"
53 #include "readline/history.h"
55 /* readline defines this. */
58 #include <sys/types.h>
60 #include "event-top.h"
61 #include "gdb_string.h"
67 /* Default command line prompt. This is overriden in some configs. */
69 #ifndef DEFAULT_PROMPT
70 #define DEFAULT_PROMPT "(gdb) "
73 /* Initialization file name for gdb. This is overridden in some configs. */
77 # define PATH_MAX FILENAME_MAX
83 #ifndef GDBINIT_FILENAME
84 #define GDBINIT_FILENAME ".gdbinit"
86 char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME;
88 int inhibit_gdbinit = 0;
90 /* If nonzero, and GDB has been configured to be able to use windows,
91 attempt to open them upon startup. */
95 extern char lang_frame_mismatch_warn[]; /* language.c */
97 /* Flag for whether we want all the "from_tty" gubbish printed. */
99 int caution = 1; /* Default is yes, sigh. */
101 show_caution (struct ui_file *file, int from_tty,
102 struct cmd_list_element *c, const char *value)
104 fprintf_filtered (file, _("\
105 Whether to confirm potentially dangerous operations is %s.\n"),
109 /* stdio stream that command input is being read from. Set to stdin normally.
110 Set by source_command to the file we are sourcing. Set to NULL if we are
111 executing a user-defined command or interacting via a GUI. */
115 /* Flag to indicate whether a user defined command is currently running. */
119 /* Current working directory. */
121 char *current_directory;
123 /* The directory name is actually stored here (usually). */
124 char gdb_dirbuf[1024];
126 /* Function to call before reading a command, if nonzero.
127 The function receives two args: an input stream,
128 and a prompt string. */
130 void (*window_hook) (FILE *, char *);
135 /* gdb prints this when reading a command interactively */
136 static char *gdb_prompt_string; /* the global prompt string */
138 /* Buffer used for reading command lines, and the size
139 allocated for it so far. */
144 /* Nonzero if the current command is modified by "server ". This
145 affects things like recording into the command history, commands
146 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
147 whatever) can issue its own commands and also send along commands
148 from the user, and have the user not notice that the user interface
149 is issuing commands too. */
152 /* Baud rate specified for talking to serial target systems. Default
153 is left as -1, so targets can choose their own defaults. */
154 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
155 or (unsigned int)-1. This is a Bad User Interface. */
159 /* Timeout limit for response from target. */
161 /* The default value has been changed many times over the years. It
162 was originally 5 seconds. But that was thought to be a long time
163 to sit and wait, so it was changed to 2 seconds. That was thought
164 to be plenty unless the connection was going through some terminal
165 server or multiplexer or other form of hairy serial connection.
167 In mid-1996, remote_timeout was moved from remote.c to top.c and
168 it began being used in other remote-* targets. It appears that the
169 default was changed to 20 seconds at that time, perhaps because the
170 Renesas E7000 ICE didn't always respond in a timely manner.
172 But if 5 seconds is a long time to sit and wait for retransmissions,
173 20 seconds is far worse. This demonstrates the difficulty of using
174 a single variable for all protocol timeouts.
176 As remote.c is used much more than remote-e7000.c, it was changed
177 back to 2 seconds in 1999. */
179 int remote_timeout = 2;
181 /* Non-zero tells remote* modules to output debugging info. */
183 int remote_debug = 0;
185 /* Sbrk location on entry to main. Used for statistics only. */
190 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
194 #define STOP_SIGNAL SIGTSTP
195 static void stop_sig (int);
199 /* Hooks for alternate command interfaces. */
201 /* Called after most modules have been initialized, but before taking users
204 If the UI fails to initialize and it wants GDB to continue
205 using the default UI, then it should clear this hook before returning. */
207 void (*deprecated_init_ui_hook) (char *argv0);
209 /* This hook is called from within gdb's many mini-event loops which could
210 steal control from a real user interface's event loop. It returns
211 non-zero if the user is requesting a detach, zero otherwise. */
213 int (*deprecated_ui_loop_hook) (int);
215 /* Called instead of command_loop at top level. Can be invoked via
216 throw_exception(). */
218 void (*deprecated_command_loop_hook) (void);
221 /* Called from print_frame_info to list the line we stopped in. */
223 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, int line,
224 int stopline, int noerror);
225 /* Replaces most of query. */
227 int (*deprecated_query_hook) (const char *, va_list);
229 /* Replaces most of warning. */
231 void (*deprecated_warning_hook) (const char *, va_list);
233 /* These three functions support getting lines of text from the user.
234 They are used in sequence. First deprecated_readline_begin_hook is
235 called with a text string that might be (for example) a message for
236 the user to type in a sequence of commands to be executed at a
237 breakpoint. If this function calls back to a GUI, it might take
238 this opportunity to pop up a text interaction window with this
239 message. Next, deprecated_readline_hook is called with a prompt
240 that is emitted prior to collecting the user input. It can be
241 called multiple times. Finally, deprecated_readline_end_hook is
242 called to notify the GUI that we are done with the interaction
243 window and it can close it. */
245 void (*deprecated_readline_begin_hook) (char *, ...);
246 char *(*deprecated_readline_hook) (char *);
247 void (*deprecated_readline_end_hook) (void);
249 /* Called as appropriate to notify the interface that we have attached
250 to or detached from an already running process. */
252 void (*deprecated_attach_hook) (void);
253 void (*deprecated_detach_hook) (void);
255 /* Called during long calculations to allow GUI to repair window damage, and to
256 check for stop buttons, etc... */
258 void (*deprecated_interactive_hook) (void);
260 /* Tell the GUI someone changed the register REGNO. -1 means
261 that the caller does not know which register changed or
262 that several registers have changed (see value_assign). */
263 void (*deprecated_register_changed_hook) (int regno);
265 /* Tell the GUI someone changed LEN bytes of memory at ADDR */
266 void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
268 /* Called when going to wait for the target. Usually allows the GUI to run
269 while waiting for target events. */
271 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
272 struct target_waitstatus * status);
274 /* Used by UI as a wrapper around command execution. May do various things
275 like enabling/disabling buttons, etc... */
277 void (*deprecated_call_command_hook) (struct cmd_list_element * c, char *cmd,
280 /* Called after a `set' command has finished. Is only run if the
281 `set' command succeeded. */
283 void (*deprecated_set_hook) (struct cmd_list_element * c);
285 /* Called when the current thread changes. Argument is thread id. */
287 void (*deprecated_context_hook) (int id);
289 /* Takes control from error (). Typically used to prevent longjmps out of the
290 middle of the GUI. Usually used in conjunction with a catch routine. */
292 void (*deprecated_error_hook) (void);
294 /* Handler for SIGHUP. */
297 /* NOTE 1999-04-29: This function will be static again, once we modify
298 gdb to use the event loop as the default command loop and we merge
299 event-top.c into this file, top.c */
303 caution = 0; /* Throw caution to the wind -- we're exiting.
304 This prevents asking the user dumb questions. */
305 quit_command ((char *) 0, 0);
308 #endif /* defined SIGHUP */
310 /* Line number we are currently in in a file which is being sourced. */
311 /* NOTE 1999-04-29: This variable will be static again, once we modify
312 gdb to use the event loop as the default command loop and we merge
313 event-top.c into this file, top.c */
314 /* static */ int source_line_number;
316 /* Name of the file we are sourcing. */
317 /* NOTE 1999-04-29: This variable will be static again, once we modify
318 gdb to use the event loop as the default command loop and we merge
319 event-top.c into this file, top.c */
320 /* static */ char *source_file_name;
322 /* Clean up on error during a "source" command (or execution of a
323 user-defined command). */
326 do_restore_instream_cleanup (void *stream)
328 /* Restore the previous input stream. */
332 /* Read commands from STREAM. */
334 read_command_file (FILE *stream)
336 struct cleanup *cleanups;
338 cleanups = make_cleanup (do_restore_instream_cleanup, instream);
341 do_cleanups (cleanups);
344 void (*pre_init_ui_hook) (void);
348 do_chdir_cleanup (void *old_dir)
355 /* Execute the line P as a command.
356 Pass FROM_TTY as second argument to the defining function. */
358 /* Execute command P, in the current user context. */
361 execute_command (char *p, int from_tty)
363 struct cmd_list_element *c;
365 static int warned = 0;
367 long time_at_cmd_start = 0;
369 long space_at_cmd_start = 0;
371 extern int display_time;
372 extern int display_space;
374 if (target_can_async_p ())
376 time_at_cmd_start = get_run_time ();
381 char *lim = (char *) sbrk (0);
382 space_at_cmd_start = lim - lim_at_start;
389 /* Force cleanup of any alloca areas if using C alloca instead of
393 /* This can happen when command_line_input hits end of file. */
397 target_log_command (p);
399 while (*p == ' ' || *p == '\t')
406 /* If trace-commands is set then this will print this command. */
407 print_command_trace (p);
409 c = lookup_cmd (&p, cmdlist, "", 0, 1);
411 /* If the selected thread has terminated, we allow only a
412 limited set of commands. */
413 if (target_can_async_p ()
414 && is_exited (inferior_ptid)
415 && !get_cmd_no_selected_thread_ok (c))
417 Cannot execute this command without a live selected thread. See `help thread'."));
419 /* Pass null arg rather than an empty one. */
422 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
423 while the is_complete_command(cfunc) test is just plain
424 bogus. They should both be replaced by a test of the form
425 c->strip_trailing_white_space_p. */
426 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
427 can't be replaced with func. This is because it is the
428 cfunc, and not the func, that has the value that the
429 is_complete_command hack is testing for. */
430 /* Clear off trailing whitespace, except for set and complete
433 && c->type != set_cmd
434 && !is_complete_command (c))
436 p = arg + strlen (arg) - 1;
437 while (p >= arg && (*p == ' ' || *p == '\t'))
442 /* If this command has been pre-hooked, run the hook first. */
443 execute_cmd_pre_hook (c);
445 if (c->flags & DEPRECATED_WARN_USER)
446 deprecated_cmd_warning (&line);
448 if (c->class == class_user)
449 execute_user_command (c, arg);
450 else if (c->type == set_cmd || c->type == show_cmd)
451 do_setshow_command (arg, from_tty & caution, c);
452 else if (!cmd_func_p (c))
453 error (_("That is not a command, just a help topic."));
454 else if (deprecated_call_command_hook)
455 deprecated_call_command_hook (c, arg, from_tty & caution);
457 cmd_func (c, arg, from_tty & caution);
459 /* If this command has been post-hooked, run the hook last. */
460 execute_cmd_post_hook (c);
464 /* Tell the user if the language has changed (except first time). */
465 if (current_language != expected_language)
467 if (language_mode == language_mode_auto)
469 language_info (1); /* Print what changed. */
474 /* Warn the user if the working language does not match the
475 language of the current frame. Only warn the user if we are
476 actually running the program, i.e. there is a stack. */
477 /* FIXME: This should be cacheing the frame and only running when
478 the frame changes. */
480 if (target_has_stack && is_stopped (inferior_ptid))
482 flang = get_frame_language ();
484 && flang != language_unknown
485 && flang != current_language->la_language)
487 printf_filtered ("%s\n", lang_frame_mismatch_warn);
493 /* Read commands from `instream' and execute them
494 until end of file or error reading instream. */
499 struct cleanup *old_chain;
501 int stdin_is_tty = ISATTY (stdin);
502 long time_at_cmd_start;
504 long space_at_cmd_start = 0;
506 extern int display_time;
507 extern int display_space;
509 while (instream && !feof (instream))
511 if (window_hook && instream == stdin)
512 (*window_hook) (instream, get_prompt ());
515 if (instream == stdin && stdin_is_tty)
516 reinitialize_more_filter ();
517 old_chain = make_cleanup (null_cleanup, 0);
519 /* Get a command-line. This calls the readline package. */
520 command = command_line_input (instream == stdin ?
521 get_prompt () : (char *) NULL,
522 instream == stdin, "prompt");
526 time_at_cmd_start = get_run_time ();
531 char *lim = (char *) sbrk (0);
532 space_at_cmd_start = lim - lim_at_start;
536 execute_command (command, instream == stdin);
538 /* Do any commands attached to breakpoint we are stopped at. */
539 bpstat_do_actions ();
541 do_cleanups (old_chain);
545 long cmd_time = get_run_time () - time_at_cmd_start;
547 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
548 cmd_time / 1000000, cmd_time % 1000000);
554 char *lim = (char *) sbrk (0);
555 long space_now = lim - lim_at_start;
556 long space_diff = space_now - space_at_cmd_start;
558 printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"),
560 (space_diff >= 0 ? "+" : ""),
567 /* Commands call this if they do not want to be repeated by null lines. */
575 /* If we aren't reading from standard input, we are saving the last
576 thing read from stdin in line and don't want to delete it. Null lines
577 won't repeat here in any case. */
578 if (instream == stdin)
582 /* Read a line from the stream "instream" without command line editing.
584 It prints PROMPT_ARG once at the start.
585 Action is compatible with "readline", e.g. space for the result is
586 malloc'd and should be freed by the caller.
588 A NULL return means end of file. */
590 gdb_readline (char *prompt_arg)
595 int result_size = 80;
599 /* Don't use a _filtered function here. It causes the assumed
600 character position to be off, since the newline we read from
601 the user is not accounted for. */
602 fputs_unfiltered (prompt_arg, gdb_stdout);
603 gdb_flush (gdb_stdout);
606 result = (char *) xmalloc (result_size);
610 /* Read from stdin if we are executing a user defined command.
611 This is the right thing for prompt_for_continue, at least. */
612 c = fgetc (instream ? instream : stdin);
617 /* The last line does not end with a newline. Return it, and
618 if we are called again fgetc will still return EOF and
619 we'll return NULL then. */
627 if (input_index > 0 && result[input_index - 1] == '\r')
632 result[input_index++] = c;
633 while (input_index >= result_size)
636 result = (char *) xrealloc (result, result_size);
640 result[input_index++] = '\0';
644 /* Variables which control command line editing and history
645 substitution. These variables are given default values at the end
647 static int command_editing_p;
649 /* NOTE 1999-04-29: This variable will be static again, once we modify
650 gdb to use the event loop as the default command loop and we merge
651 event-top.c into this file, top.c */
653 /* static */ int history_expansion_p;
655 static int write_history_p;
657 show_write_history_p (struct ui_file *file, int from_tty,
658 struct cmd_list_element *c, const char *value)
660 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
664 static int history_size;
666 show_history_size (struct ui_file *file, int from_tty,
667 struct cmd_list_element *c, const char *value)
669 fprintf_filtered (file, _("The size of the command history is %s.\n"),
673 static char *history_filename;
675 show_history_filename (struct ui_file *file, int from_tty,
676 struct cmd_list_element *c, const char *value)
678 fprintf_filtered (file, _("\
679 The filename in which to record the command history is \"%s\".\n"),
683 /* This is like readline(), but it has some gdb-specific behavior.
684 gdb may want readline in both the synchronous and async modes during
685 a single gdb invocation. At the ordinary top-level prompt we might
686 be using the async readline. That means we can't use
687 rl_pre_input_hook, since it doesn't work properly in async mode.
688 However, for a secondary prompt (" >", such as occurs during a
689 `define'), gdb wants a synchronous response.
691 We used to call readline() directly, running it in synchronous
692 mode. But mixing modes this way is not supported, and as of
693 readline 5.x it no longer works; the arrow keys come unbound during
694 the synchronous call. So we make a nested call into the event
695 loop. That's what gdb_readline_wrapper is for. */
697 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
698 rely on gdb_readline_wrapper_result, which might still be NULL if
699 the user types Control-D for EOF. */
700 static int gdb_readline_wrapper_done;
702 /* The result of the current call to gdb_readline_wrapper, once a newline
704 static char *gdb_readline_wrapper_result;
706 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
707 to be called after the newline is processed (which will redisplay
708 the prompt). But in gdb_readline_wrapper we will not get a new
709 prompt until the next call, or until we return to the event loop.
710 So we disable this hook around the newline and restore it before we
712 static void (*saved_after_char_processing_hook) (void);
714 /* This function is called when readline has seen a complete line of
718 gdb_readline_wrapper_line (char *line)
720 gdb_assert (!gdb_readline_wrapper_done);
721 gdb_readline_wrapper_result = line;
722 gdb_readline_wrapper_done = 1;
724 /* Prevent operate-and-get-next from acting too early. */
725 saved_after_char_processing_hook = after_char_processing_hook;
726 after_char_processing_hook = NULL;
728 /* Prevent parts of the prompt from being redisplayed if annotations
729 are enabled, and readline's state getting out of sync. */
730 if (async_command_editing_p)
731 rl_callback_handler_remove ();
734 struct gdb_readline_wrapper_cleanup
736 void (*handler_orig) (char *);
737 int already_prompted_orig;
741 gdb_readline_wrapper_cleanup (void *arg)
743 struct gdb_readline_wrapper_cleanup *cleanup = arg;
745 rl_already_prompted = cleanup->already_prompted_orig;
747 gdb_assert (input_handler == gdb_readline_wrapper_line);
748 input_handler = cleanup->handler_orig;
749 gdb_readline_wrapper_result = NULL;
750 gdb_readline_wrapper_done = 0;
752 after_char_processing_hook = saved_after_char_processing_hook;
753 saved_after_char_processing_hook = NULL;
759 gdb_readline_wrapper (char *prompt)
761 struct cleanup *back_to;
762 struct gdb_readline_wrapper_cleanup *cleanup;
765 cleanup = xmalloc (sizeof (*cleanup));
766 cleanup->handler_orig = input_handler;
767 input_handler = gdb_readline_wrapper_line;
769 cleanup->already_prompted_orig = rl_already_prompted;
771 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
773 /* Display our prompt and prevent double prompt display. */
774 display_gdb_prompt (prompt);
775 rl_already_prompted = 1;
777 if (after_char_processing_hook)
778 (*after_char_processing_hook) ();
779 gdb_assert (after_char_processing_hook == NULL);
781 /* gdb_do_one_event argument is unused. */
782 while (gdb_do_one_event (NULL) >= 0)
783 if (gdb_readline_wrapper_done)
786 retval = gdb_readline_wrapper_result;
787 do_cleanups (back_to);
796 #if STOP_SIGNAL == SIGTSTP
797 signal (SIGTSTP, SIG_DFL);
803 sigprocmask (SIG_SETMASK, &zero, 0);
805 #elif HAVE_SIGSETMASK
808 kill (getpid (), SIGTSTP);
809 signal (SIGTSTP, stop_sig);
811 signal (STOP_SIGNAL, stop_sig);
813 printf_unfiltered ("%s", get_prompt ());
814 gdb_flush (gdb_stdout);
816 /* Forget about any previous command -- null line now will do nothing. */
819 #endif /* STOP_SIGNAL */
821 /* Initialize signal handlers. */
823 float_handler (int signo)
825 /* This message is based on ANSI C, section 4.7. Note that integer
826 divide by zero causes this, so "float" is a misnomer. */
827 signal (SIGFPE, float_handler);
828 error (_("Erroneous arithmetic operation."));
832 do_nothing (int signo)
834 /* Under System V the default disposition of a signal is reinstated after
835 the signal is caught and delivered to an application process. On such
836 systems one must restore the replacement signal handler if one wishes
837 to continue handling the signal in one's program. On BSD systems this
838 is not needed but it is harmless, and it simplifies the code to just do
839 it unconditionally. */
840 signal (signo, do_nothing);
843 /* The current saved history number from operate-and-get-next.
844 This is -1 if not valid. */
845 static int operate_saved_history = -1;
847 /* This is put on the appropriate hook and helps operate-and-get-next
850 gdb_rl_operate_and_get_next_completion (void)
852 int delta = where_history () - operate_saved_history;
853 /* The `key' argument to rl_get_previous_history is ignored. */
854 rl_get_previous_history (delta, 0);
855 operate_saved_history = -1;
857 /* readline doesn't automatically update the display for us. */
860 after_char_processing_hook = NULL;
861 rl_pre_input_hook = NULL;
864 /* This is a gdb-local readline command handler. It accepts the
865 current command line (like RET does) and, if this command was taken
866 from the history, arranges for the next command in the history to
867 appear on the command line when the prompt returns.
868 We ignore the arguments. */
870 gdb_rl_operate_and_get_next (int count, int key)
874 /* Use the async hook. */
875 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
877 /* Find the current line, and find the next line to use. */
878 where = where_history();
880 /* FIXME: kettenis/20020817: max_input_history is renamed into
881 history_max_entries in readline-4.2. When we do a new readline
882 import, we should probably change it here too, even though
883 readline maintains backwards compatibility for now by still
884 defining max_input_history. */
885 if ((history_is_stifled () && (history_length >= max_input_history)) ||
886 (where >= history_length - 1))
887 operate_saved_history = where;
889 operate_saved_history = where + 1;
891 return rl_newline (1, key);
894 /* Read one line from the command input stream `instream'
895 into the local static buffer `linebuffer' (whose current length
897 The buffer is made bigger as necessary.
898 Returns the address of the start of the line.
900 NULL is returned for end of file.
902 *If* the instream == stdin & stdin is a terminal, the line read
903 is copied into the file line saver (global var char *line,
904 length linesize) so that it can be duplicated.
906 This routine either uses fancy command line editing or
907 simple input as the user has requested. */
910 command_line_input (char *prompt_arg, int repeat, char *annotation_suffix)
912 static char *linebuffer = 0;
913 static unsigned linelength = 0;
917 char *local_prompt = prompt_arg;
921 /* The annotation suffix must be non-NULL. */
922 if (annotation_suffix == NULL)
923 annotation_suffix = "";
925 if (annotation_level > 1 && instream == stdin)
927 local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg))
928 + strlen (annotation_suffix) + 40);
929 if (prompt_arg == NULL)
930 local_prompt[0] = '\0';
932 strcpy (local_prompt, prompt_arg);
933 strcat (local_prompt, "\n\032\032");
934 strcat (local_prompt, annotation_suffix);
935 strcat (local_prompt, "\n");
941 linebuffer = (char *) xmalloc (linelength);
946 /* Control-C quits instantly if typed while in this loop
947 since it should not wait until the user types a newline. */
951 signal (STOP_SIGNAL, handle_stop_sig);
956 /* Make sure that all output has been output. Some machines may let
957 you get away with leaving out some of the gdb_flush, but not all. */
959 gdb_flush (gdb_stdout);
960 gdb_flush (gdb_stderr);
962 if (source_file_name != NULL)
963 ++source_line_number;
965 if (annotation_level > 1 && instream == stdin)
967 puts_unfiltered ("\n\032\032pre-");
968 puts_unfiltered (annotation_suffix);
969 puts_unfiltered ("\n");
972 /* Don't use fancy stuff if not talking to stdin. */
973 if (deprecated_readline_hook && input_from_terminal_p ())
975 rl = (*deprecated_readline_hook) (local_prompt);
977 else if (command_editing_p && input_from_terminal_p ())
979 rl = gdb_readline_wrapper (local_prompt);
983 rl = gdb_readline (local_prompt);
986 if (annotation_level > 1 && instream == stdin)
988 puts_unfiltered ("\n\032\032post-");
989 puts_unfiltered (annotation_suffix);
990 puts_unfiltered ("\n");
993 if (!rl || rl == (char *) EOF)
998 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
1000 linelength = strlen (rl) + 1 + (p - linebuffer);
1001 nline = (char *) xrealloc (linebuffer, linelength);
1002 p += nline - linebuffer;
1006 /* Copy line. Don't copy null at end. (Leaves line alone
1007 if this was just a newline) */
1011 xfree (rl); /* Allocated in readline. */
1013 if (p == linebuffer || *(p - 1) != '\\')
1016 p--; /* Put on top of '\'. */
1017 local_prompt = (char *) 0;
1022 signal (STOP_SIGNAL, SIG_DFL);
1029 #define SERVER_COMMAND_LENGTH 7
1031 (p - linebuffer > SERVER_COMMAND_LENGTH)
1032 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
1035 /* Note that we don't set `line'. Between this and the check in
1036 dont_repeat, this insures that repeating will still do the
1039 return linebuffer + SERVER_COMMAND_LENGTH;
1042 /* Do history expansion if that is wished. */
1043 if (history_expansion_p && instream == stdin
1044 && ISATTY (instream))
1046 char *history_value;
1049 *p = '\0'; /* Insert null now. */
1050 expanded = history_expand (linebuffer, &history_value);
1053 /* Print the changes. */
1054 printf_unfiltered ("%s\n", history_value);
1056 /* If there was an error, call this function again. */
1059 xfree (history_value);
1060 return command_line_input (prompt_arg, repeat, annotation_suffix);
1062 if (strlen (history_value) > linelength)
1064 linelength = strlen (history_value) + 1;
1065 linebuffer = (char *) xrealloc (linebuffer, linelength);
1067 strcpy (linebuffer, history_value);
1068 p = linebuffer + strlen (linebuffer);
1070 xfree (history_value);
1073 /* If we just got an empty line, and that is supposed
1074 to repeat the previous command, return the value in the
1076 if (repeat && p == linebuffer)
1078 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
1084 /* Add line to history if appropriate. */
1085 if (instream == stdin
1086 && ISATTY (stdin) && *linebuffer)
1087 add_history (linebuffer);
1089 /* Note: lines consisting solely of comments are added to the command
1090 history. This is useful when you type a command, and then
1091 realize you don't want to execute it quite yet. You can comment
1092 out the command and then later fetch it from the value history
1093 and remove the '#'. The kill ring is probably better, but some
1094 people are in the habit of commenting things out. */
1096 *p1 = '\0'; /* Found a comment. */
1098 /* Save into global buffer if appropriate. */
1101 if (linelength > linesize)
1103 line = xrealloc (line, linelength);
1104 linesize = linelength;
1106 strcpy (line, linebuffer);
1113 /* Print the GDB banner. */
1115 print_gdb_version (struct ui_file *stream)
1117 /* From GNU coding standards, first line is meant to be easy for a
1118 program to parse, and is just canonical program name and version
1119 number, which starts after last space. */
1121 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1123 /* Second line is a copyright notice. */
1125 fprintf_filtered (stream, "Copyright (C) 2008 Free Software Foundation, Inc.\n");
1127 /* Following the copyright is a brief statement that the program is
1128 free software, that users are free to copy and change it on
1129 certain conditions, that it is covered by the GNU GPL, and that
1130 there is no warranty. */
1132 fprintf_filtered (stream, "\
1133 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
1134 This is free software: you are free to change and redistribute it.\n\
1135 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1136 and \"show warranty\" for details.\n");
1138 /* After the required info we print the configuration information. */
1140 fprintf_filtered (stream, "This GDB was configured as \"");
1141 if (strcmp (host_name, target_name) != 0)
1143 fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name);
1147 fprintf_filtered (stream, "%s", host_name);
1149 fprintf_filtered (stream, "\".");
1151 if (REPORT_BUGS_TO[0])
1153 fprintf_filtered (stream,
1154 _("\nFor bug reporting instructions, please see:\n"));
1155 fprintf_filtered (stream, "%s.", REPORT_BUGS_TO);
1159 /* get_prompt: access method for the GDB prompt string. */
1168 set_prompt (char *s)
1170 /* ??rehrauer: I don't know why this fails, since it looks as though
1171 assignments to prompt are wrapped in calls to savestring...
1175 PROMPT (0) = savestring (s, strlen (s));
1179 /* If necessary, make the user confirm that we should quit. Return
1180 non-zero if we should quit, zero if we shouldn't. */
1185 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
1188 struct inferior *inf = current_inferior ();
1190 /* This is something of a hack. But there's no reliable way to
1191 see if a GUI is running. The `use_windows' variable doesn't
1193 if (deprecated_init_ui_hook)
1194 s = "A debugging session is active.\nDo you still want to close the debugger?";
1195 else if (inf->attach_flag)
1196 s = "The program is running. Quit anyway (and detach it)? ";
1198 s = "The program is running. Quit anyway (and kill it)? ";
1200 if (!query ("%s", s))
1213 /* Callback for iterate_over_threads. Finds any thread of inferior
1214 given by ARG (really an int*). */
1217 any_thread_of (struct thread_info *thread, void *arg)
1219 int pid = * (int *)arg;
1221 if (PIDGET (thread->ptid) == pid)
1227 /* Callback for iterate_over_inferiors. Kills or detaches the given
1228 inferior, depending on how we originally gained control of it. */
1231 kill_or_detach (struct inferior *inf, void *args)
1233 struct qt_args *qt = args;
1234 struct thread_info *thread;
1236 thread = iterate_over_threads (any_thread_of, &inf->pid);
1239 switch_to_thread (thread->ptid);
1240 if (inf->attach_flag)
1241 target_detach (qt->args, qt->from_tty);
1249 /* Helper routine for quit_force that requires error handling. */
1252 quit_target (void *arg)
1254 struct qt_args *qt = (struct qt_args *)arg;
1256 /* Kill or detach all inferiors. */
1257 iterate_over_inferiors (kill_or_detach, qt);
1259 /* Give all pushed targets a chance to do minimal cleanup, and pop
1261 pop_all_targets (1);
1263 /* Save the history information if it is appropriate to do so. */
1264 if (write_history_p && history_filename)
1265 write_history (history_filename);
1267 do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */
1272 /* Quit without asking for confirmation. */
1275 quit_force (char *args, int from_tty)
1280 /* An optional expression may be used to cause gdb to terminate with the
1281 value of that expression. */
1284 struct value *val = parse_and_eval (args);
1286 exit_code = (int) value_as_long (val);
1288 else if (return_child_result)
1289 exit_code = return_child_result_value;
1292 qt.from_tty = from_tty;
1294 /* We want to handle any quit errors and exit regardless. */
1295 catch_errors (quit_target, &qt,
1296 "Quitting: ", RETURN_MASK_ALL);
1301 /* Returns whether GDB is running on a terminal and input is
1302 currently coming from that terminal. */
1305 input_from_terminal_p (void)
1307 if (gdb_has_a_terminal () && instream == stdin)
1310 /* If INSTREAM is unset, and we are not in a user command, we
1311 must be in Insight. That's like having a terminal, for our
1313 if (instream == NULL && !in_user_command)
1320 dont_repeat_command (char *ignored, int from_tty)
1322 *line = 0; /* Can't call dont_repeat here because we're not
1323 necessarily reading from stdin. */
1326 /* Functions to manipulate command line editing control variables. */
1328 /* Number of commands to print in each call to show_commands. */
1329 #define Hist_print 10
1331 show_commands (char *args, int from_tty)
1333 /* Index for history commands. Relative to history_base. */
1336 /* Number of the history entry which we are planning to display next.
1337 Relative to history_base. */
1340 /* The first command in the history which doesn't exist (i.e. one more
1341 than the number of the last command). Relative to history_base. */
1344 /* Print out some of the commands from the command history. */
1345 /* First determine the length of the history list. */
1346 hist_len = history_size;
1347 for (offset = 0; offset < history_size; offset++)
1349 if (!history_get (history_base + offset))
1358 if (args[0] == '+' && args[1] == '\0')
1359 /* "info editing +" should print from the stored position. */
1362 /* "info editing <exp>" should print around command number <exp>. */
1363 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1365 /* "show commands" means print the last Hist_print commands. */
1368 num = hist_len - Hist_print;
1374 /* If there are at least Hist_print commands, we want to display the last
1375 Hist_print rather than, say, the last 6. */
1376 if (hist_len - num < Hist_print)
1378 num = hist_len - Hist_print;
1383 for (offset = num; offset < num + Hist_print && offset < hist_len; offset++)
1385 printf_filtered ("%5d %s\n", history_base + offset,
1386 (history_get (history_base + offset))->line);
1389 /* The next command we want to display is the next one that we haven't
1393 /* If the user repeats this command with return, it should do what
1394 "show commands +" does. This is unnecessary if arg is null,
1395 because "show commands +" is not useful after "show commands". */
1396 if (from_tty && args)
1403 /* Called by do_setshow_command. */
1405 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1407 if (history_size == INT_MAX)
1408 unstifle_history ();
1409 else if (history_size >= 0)
1410 stifle_history (history_size);
1413 history_size = INT_MAX;
1414 error (_("History size must be non-negative"));
1419 set_history (char *args, int from_tty)
1421 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1422 help_list (sethistlist, "set history ", -1, gdb_stdout);
1426 show_history (char *args, int from_tty)
1428 cmd_show_list (showhistlist, from_tty, "");
1431 int info_verbose = 0; /* Default verbose msgs off */
1433 /* Called by do_setshow_command. An elaborate joke. */
1435 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1437 char *cmdname = "verbose";
1438 struct cmd_list_element *showcmd;
1440 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1444 c->doc = "Set verbose printing of informational messages.";
1445 showcmd->doc = "Show verbose printing of informational messages.";
1449 c->doc = "Set verbosity.";
1450 showcmd->doc = "Show verbosity.";
1454 /* Init the history buffer. Note that we are called after the init file(s)
1455 * have been read so that the user can change the history file via his
1456 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1457 * overrides all of this.
1465 tmpenv = getenv ("HISTSIZE");
1467 history_size = atoi (tmpenv);
1468 else if (!history_size)
1471 stifle_history (history_size);
1473 tmpenv = getenv ("GDBHISTFILE");
1475 history_filename = savestring (tmpenv, strlen (tmpenv));
1476 else if (!history_filename)
1478 /* We include the current directory so that if the user changes
1479 directories the file written will be the same as the one
1482 /* No leading dots in file names are allowed on MSDOS. */
1483 history_filename = concat (current_directory, "/_gdb_history",
1486 history_filename = concat (current_directory, "/.gdb_history",
1490 read_history (history_filename);
1494 show_new_async_prompt (struct ui_file *file, int from_tty,
1495 struct cmd_list_element *c, const char *value)
1497 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1501 show_async_command_editing_p (struct ui_file *file, int from_tty,
1502 struct cmd_list_element *c, const char *value)
1504 fprintf_filtered (file, _("\
1505 Editing of command lines as they are typed is %s.\n"),
1510 show_annotation_level (struct ui_file *file, int from_tty,
1511 struct cmd_list_element *c, const char *value)
1513 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1517 show_exec_done_display_p (struct ui_file *file, int from_tty,
1518 struct cmd_list_element *c, const char *value)
1520 fprintf_filtered (file, _("\
1521 Notification of completion for asynchronous execution commands is %s.\n"),
1527 struct cmd_list_element *c;
1529 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1530 whatever the DEFAULT_PROMPT is. */
1531 the_prompts.top = 0;
1533 PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT));
1535 /* Set things up for annotation_level > 1, if the user ever decides
1537 async_annotation_suffix = "prompt";
1538 /* Set the variable associated with the setshow prompt command. */
1539 new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0)));
1541 /* If gdb was started with --annotate=2, this is equivalent to the
1542 user entering the command 'set annotate 2' at the gdb prompt, so
1543 we need to do extra processing. */
1544 if (annotation_level > 1)
1545 set_async_annotation_level (NULL, 0, NULL);
1547 /* Set the important stuff up for command editing. */
1548 command_editing_p = 1;
1549 history_expansion_p = 0;
1550 write_history_p = 0;
1552 /* Setup important stuff for command line editing. */
1553 rl_completion_entry_function = readline_line_completion_function;
1554 rl_completer_word_break_characters = default_word_break_characters ();
1555 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
1556 rl_readline_name = "gdb";
1557 rl_terminal_name = getenv ("TERM");
1559 /* The name for this defun comes from Bash, where it originated.
1560 15 is Control-o, the same binding this function has in Bash. */
1561 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
1563 add_setshow_string_cmd ("prompt", class_support,
1564 &new_async_prompt, _("\
1565 Set gdb's prompt"), _("\
1566 Show gdb's prompt"), NULL,
1568 show_new_async_prompt,
1569 &setlist, &showlist);
1571 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
1572 Don't repeat this command.\n\
1573 Primarily used inside of user-defined commands that should not be repeated when\n\
1576 add_setshow_boolean_cmd ("editing", class_support,
1577 &async_command_editing_p, _("\
1578 Set editing of command lines as they are typed."), _("\
1579 Show editing of command lines as they are typed."), _("\
1580 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1581 Without an argument, command line editing is enabled. To edit, use\n\
1582 EMACS-like or VI-like commands like control-P or ESC."),
1583 set_async_editing_command,
1584 show_async_command_editing_p,
1585 &setlist, &showlist);
1587 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
1588 Set saving of the history record on exit."), _("\
1589 Show saving of the history record on exit."), _("\
1590 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1591 Without an argument, saving is enabled."),
1593 show_write_history_p,
1594 &sethistlist, &showhistlist);
1596 add_setshow_integer_cmd ("size", no_class, &history_size, _("\
1597 Set the size of the command history,"), _("\
1598 Show the size of the command history,"), _("\
1599 ie. the number of previous commands to keep a record of."),
1600 set_history_size_command,
1602 &sethistlist, &showhistlist);
1604 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
1605 Set the filename in which to record the command history"), _("\
1606 Show the filename in which to record the command history"), _("\
1607 (the list of previous commands of which a record is kept)."),
1609 show_history_filename,
1610 &sethistlist, &showhistlist);
1612 add_setshow_boolean_cmd ("confirm", class_support, &caution, _("\
1613 Set whether to confirm potentially dangerous operations."), _("\
1614 Show whether to confirm potentially dangerous operations."), NULL,
1617 &setlist, &showlist);
1619 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
1620 Set annotation_level."), _("\
1621 Show annotation_level."), _("\
1622 0 == normal; 1 == fullname (for use when running under emacs)\n\
1623 2 == output annotated suitably for use by programs that control GDB."),
1624 set_async_annotation_level,
1625 show_annotation_level,
1626 &setlist, &showlist);
1628 add_setshow_boolean_cmd ("exec-done-display", class_support,
1629 &exec_done_display_p, _("\
1630 Set notification of completion for asynchronous execution commands."), _("\
1631 Show notification of completion for asynchronous execution commands."), _("\
1632 Use \"on\" to enable the notification, and \"off\" to disable it."),
1634 show_exec_done_display_p,
1635 &setlist, &showlist);
1639 gdb_init (char *argv0)
1641 if (pre_init_ui_hook)
1642 pre_init_ui_hook ();
1644 /* Run the init function of each source file */
1646 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
1647 current_directory = gdb_dirbuf;
1650 /* Make sure we return to the original directory upon exit, come
1651 what may, since the OS doesn't do that for us. */
1652 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
1655 init_cmd_lists (); /* This needs to be done first */
1656 initialize_targets (); /* Setup target_terminal macros for utils.c */
1657 initialize_utils (); /* Make errors and warnings possible */
1658 initialize_all_files ();
1659 initialize_current_architecture ();
1661 init_main (); /* But that omits this file! Do it now */
1663 initialize_stdin_serial ();
1665 async_init_signals ();
1667 /* We need a default language for parsing expressions, so simple things like
1668 "set width 0" won't fail if no language is explicitly set in a config file
1669 or implicitly set by reading an executable during startup. */
1670 set_language (language_c);
1671 expected_language = current_language; /* don't warn about the change. */
1673 /* Allow another UI to initialize. If the UI fails to initialize,
1674 and it wants GDB to revert to the CLI, it should clear
1675 deprecated_init_ui_hook. */
1676 if (deprecated_init_ui_hook)
1677 deprecated_init_ui_hook (argv0);