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 /* Cleanup that deletes a UI. */
330 delete_ui_cleanup (void *void_ui)
332 struct ui *ui = (struct ui *) void_ui;
340 make_delete_ui_cleanup (struct ui *ui)
342 return make_cleanup (delete_ui_cleanup, ui);
345 /* Open file named NAME for read/write, making sure not to make it the
346 controlling terminal. */
349 open_terminal_stream (const char *name)
353 fd = open (name, O_RDWR | O_NOCTTY);
355 perror_with_name (_("opening terminal failed"));
357 return fdopen (fd, "w+");
360 /* Implementation of the "new-ui" command. */
363 new_ui_command (char *args, int from_tty)
366 struct interp *interp;
367 FILE *stream[3] = { NULL, NULL, NULL };
372 const char *interpreter_name;
373 const char *tty_name;
374 struct cleanup *success_chain;
375 struct cleanup *failure_chain;
379 argv = gdb_buildargv (args);
380 success_chain = make_cleanup_freeargv (argv);
381 argc = countargv (argv);
384 error (_("usage: new-ui <interpreter> <tty>"));
386 interpreter_name = argv[0];
389 make_cleanup_restore_current_ui ();
391 failure_chain = make_cleanup (null_cleanup, NULL);
393 /* Open specified terminal, once for each of
394 stdin/stdout/stderr. */
395 for (i = 0; i < 3; i++)
397 stream[i] = open_terminal_stream (tty_name);
398 make_cleanup_fclose (stream[i]);
401 ui = new_ui (stream[0], stream[1], stream[2]);
402 make_cleanup (delete_ui_cleanup, ui);
408 set_top_level_interpreter (interpreter_name);
410 interp_pre_command_loop (top_level_interpreter ());
412 discard_cleanups (failure_chain);
414 /* This restores the previous UI and frees argv. */
415 do_cleanups (success_chain);
417 printf_unfiltered ("New UI allocated\n");
420 /* Handler for SIGHUP. */
423 /* NOTE 1999-04-29: This function 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. */
429 /* Stop asking user for confirmation --- we're exiting. This
430 prevents asking the user dumb questions. */
432 quit_command ((char *) 0, 0);
434 #endif /* defined SIGHUP */
436 /* Line number we are currently in, in a file which is being sourced. */
437 /* NOTE 1999-04-29: This variable will be static again, once we modify
438 gdb to use the event loop as the default command loop and we merge
439 event-top.c into this file, top.c. */
440 /* static */ int source_line_number;
442 /* Name of the file we are sourcing. */
443 /* NOTE 1999-04-29: This variable will be static again, once we modify
444 gdb to use the event loop as the default command loop and we merge
445 event-top.c into this file, top.c. */
446 /* static */ const char *source_file_name;
448 /* Clean up on error during a "source" command (or execution of a
449 user-defined command). */
452 do_restore_instream_cleanup (void *stream)
454 struct ui *ui = current_ui;
456 /* Restore the previous input stream. */
457 ui->instream = (FILE *) stream;
460 /* Read commands from STREAM. */
462 read_command_file (FILE *stream)
464 struct ui *ui = current_ui;
465 struct cleanup *cleanups;
467 cleanups = make_cleanup (do_restore_instream_cleanup, ui->instream);
468 ui->instream = stream;
470 /* Read commands from `instream' and execute them until end of file
471 or error reading instream. */
473 while (ui->instream != NULL && !feof (ui->instream))
477 /* Get a command-line. This calls the readline package. */
478 command = command_line_input (NULL, 0, NULL);
481 command_handler (command);
484 do_cleanups (cleanups);
487 void (*pre_init_ui_hook) (void);
491 do_chdir_cleanup (void *old_dir)
493 chdir ((const char *) old_dir);
499 prepare_execute_command (void)
502 struct cleanup *cleanup;
504 mark = value_mark ();
505 cleanup = make_cleanup_value_free_to_mark (mark);
507 /* With multiple threads running while the one we're examining is
508 stopped, the dcache can get stale without us being able to detect
509 it. For the duration of the command, though, use the dcache to
510 help things like backtrace. */
512 target_dcache_invalidate ();
517 /* Tell the user if the language has changed (except first time) after
518 executing a command. */
521 check_frame_language_change (void)
523 static int warned = 0;
524 struct frame_info *frame;
526 /* First make sure that a new frame has been selected, in case the
527 command or the hooks changed the program state. */
528 frame = deprecated_safe_get_selected_frame ();
529 if (current_language != expected_language)
531 if (language_mode == language_mode_auto && info_verbose)
533 language_info (1); /* Print what changed. */
538 /* Warn the user if the working language does not match the language
539 of the current frame. Only warn the user if we are actually
540 running the program, i.e. there is a stack. */
541 /* FIXME: This should be cacheing the frame and only running when
542 the frame changes. */
544 if (has_stack_frames ())
548 flang = get_frame_language (frame);
550 && flang != language_unknown
551 && flang != current_language->la_language)
553 printf_filtered ("%s\n", lang_frame_mismatch_warn);
562 wait_sync_command_done (void)
564 /* Processing events may change the current UI. */
565 struct cleanup *old_chain = make_cleanup_restore_current_ui ();
566 struct ui *ui = current_ui;
568 while (gdb_do_one_event () >= 0)
569 if (ui->prompt_state != PROMPT_BLOCKED)
572 do_cleanups (old_chain);
578 maybe_wait_sync_command_done (int was_sync)
580 /* If the interpreter is in sync mode (we're running a user
581 command's list, running command hooks or similars), and we
582 just ran a synchronous command that started the target, wait
583 for that command to end. */
584 if (!current_ui->async
586 && current_ui->prompt_state == PROMPT_BLOCKED)
587 wait_sync_command_done ();
590 /* Execute the line P as a command, in the current user context.
591 Pass FROM_TTY as second argument to the defining function. */
594 execute_command (char *p, int from_tty)
596 struct cleanup *cleanup_if_error, *cleanup;
597 struct cmd_list_element *c;
600 cleanup_if_error = make_bpstat_clear_actions_cleanup ();
601 cleanup = prepare_execute_command ();
603 /* Force cleanup of any alloca areas if using C alloca instead of
607 /* This can happen when command_line_input hits end of file. */
610 do_cleanups (cleanup);
611 discard_cleanups (cleanup_if_error);
615 target_log_command (p);
617 while (*p == ' ' || *p == '\t')
623 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
627 /* If trace-commands is set then this will print this command. */
628 print_command_trace (p);
630 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
633 /* Pass null arg rather than an empty one. */
636 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
637 while the is_complete_command(cfunc) test is just plain
638 bogus. They should both be replaced by a test of the form
639 c->strip_trailing_white_space_p. */
640 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
641 can't be replaced with func. This is because it is the
642 cfunc, and not the func, that has the value that the
643 is_complete_command hack is testing for. */
644 /* Clear off trailing whitespace, except for set and complete
647 && c->type != set_cmd
648 && !is_complete_command (c))
650 p = arg + strlen (arg) - 1;
651 while (p >= arg && (*p == ' ' || *p == '\t'))
656 /* If this command has been pre-hooked, run the hook first. */
657 execute_cmd_pre_hook (c);
659 if (c->deprecated_warn_user)
660 deprecated_cmd_warning (line);
662 /* c->user_commands would be NULL in the case of a python command. */
663 if (c->theclass == class_user && c->user_commands)
664 execute_user_command (c, arg);
665 else if (c->type == set_cmd)
666 do_set_command (arg, from_tty, c);
667 else if (c->type == show_cmd)
668 do_show_command (arg, from_tty, c);
669 else if (!cmd_func_p (c))
670 error (_("That is not a command, just a help topic."));
671 else if (deprecated_call_command_hook)
672 deprecated_call_command_hook (c, arg, from_tty);
674 cmd_func (c, arg, from_tty);
676 maybe_wait_sync_command_done (was_sync);
678 /* If this command has been post-hooked, run the hook last. */
679 execute_cmd_post_hook (c);
683 check_frame_language_change ();
685 do_cleanups (cleanup);
686 discard_cleanups (cleanup_if_error);
689 /* Run execute_command for P and FROM_TTY. Capture its output into the
690 returned string, do not display it to the screen. BATCH_FLAG will be
691 temporarily set to true. */
694 execute_command_to_string (char *p, int from_tty)
696 struct ui_file *str_file;
697 struct cleanup *cleanup;
700 /* GDB_STDOUT should be better already restored during these
701 restoration callbacks. */
702 cleanup = set_batch_flag_and_make_cleanup_restore_page_info ();
704 make_cleanup_restore_integer (¤t_ui->async);
705 current_ui->async = 0;
707 str_file = mem_fileopen ();
709 make_cleanup_ui_file_delete (str_file);
710 make_cleanup_restore_ui_file (&gdb_stdout);
711 make_cleanup_restore_ui_file (&gdb_stderr);
712 make_cleanup_restore_ui_file (&gdb_stdlog);
713 make_cleanup_restore_ui_file (&gdb_stdtarg);
714 make_cleanup_restore_ui_file (&gdb_stdtargerr);
716 if (ui_out_redirect (current_uiout, str_file) < 0)
717 warning (_("Current output protocol does not support redirection"));
719 make_cleanup_ui_out_redirect_pop (current_uiout);
721 gdb_stdout = str_file;
722 gdb_stderr = str_file;
723 gdb_stdlog = str_file;
724 gdb_stdtarg = str_file;
725 gdb_stdtargerr = str_file;
727 execute_command (p, from_tty);
729 retval = ui_file_xstrdup (str_file, NULL);
731 do_cleanups (cleanup);
737 /* When nonzero, cause dont_repeat to do nothing. This should only be
738 set via prevent_dont_repeat. */
740 static int suppress_dont_repeat = 0;
742 /* Commands call this if they do not want to be repeated by null lines. */
747 struct ui *ui = current_ui;
749 if (suppress_dont_repeat || server_command)
752 /* If we aren't reading from standard input, we are saving the last
753 thing read from stdin in line and don't want to delete it. Null
754 lines won't repeat here in any case. */
755 if (ui->instream == ui->stdin_stream)
756 *saved_command_line = 0;
759 /* Prevent dont_repeat from working, and return a cleanup that
760 restores the previous state. */
763 prevent_dont_repeat (void)
765 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat);
767 suppress_dont_repeat = 1;
772 /* Read a line from the stream "instream" without command line editing.
774 It prints PROMPT once at the start.
775 Action is compatible with "readline", e.g. space for the result is
776 malloc'd and should be freed by the caller.
778 A NULL return means end of file. */
781 gdb_readline_no_editing (const char *prompt)
783 struct buffer line_buffer;
784 struct ui *ui = current_ui;
785 /* Read from stdin if we are executing a user defined command. This
786 is the right thing for prompt_for_continue, at least. */
787 FILE *stream = ui->instream != NULL ? ui->instream : stdin;
788 int fd = fileno (stream);
790 buffer_init (&line_buffer);
794 /* Don't use a _filtered function here. It causes the assumed
795 character position to be off, since the newline we read from
796 the user is not accounted for. */
797 fputs_unfiltered (prompt, gdb_stdout);
798 gdb_flush (gdb_stdout);
809 /* Wait until at least one byte of data is available. Control-C
810 can interrupt interruptible_select, but not fgetc. */
812 FD_SET (fd, &readfds);
813 if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
817 /* If this was ctrl-c, the QUIT above handles it. */
820 perror_with_name (("select"));
827 if (line_buffer.used_size > 0)
828 /* The last line does not end with a newline. Return it, and
829 if we are called again fgetc will still return EOF and
830 we'll return NULL then. */
832 xfree (buffer_finish (&line_buffer));
838 if (line_buffer.used_size > 0
839 && line_buffer.buffer[line_buffer.used_size - 1] == '\r')
840 line_buffer.used_size--;
844 buffer_grow_char (&line_buffer, c);
847 buffer_grow_char (&line_buffer, '\0');
848 return buffer_finish (&line_buffer);
851 /* Variables which control command line editing and history
852 substitution. These variables are given default values at the end
854 static int command_editing_p;
856 /* NOTE 1999-04-29: This variable will be static again, once we modify
857 gdb to use the event loop as the default command loop and we merge
858 event-top.c into this file, top.c. */
860 /* static */ int history_expansion_p;
862 static int write_history_p;
864 show_write_history_p (struct ui_file *file, int from_tty,
865 struct cmd_list_element *c, const char *value)
867 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
871 /* The variable associated with the "set/show history size"
872 command. The value -1 means unlimited, and -2 means undefined. */
873 static int history_size_setshow_var = -2;
876 show_history_size (struct ui_file *file, int from_tty,
877 struct cmd_list_element *c, const char *value)
879 fprintf_filtered (file, _("The size of the command history is %s.\n"),
883 /* Variable associated with the "history remove-duplicates" option.
884 The value -1 means unlimited. */
885 static int history_remove_duplicates = 0;
888 show_history_remove_duplicates (struct ui_file *file, int from_tty,
889 struct cmd_list_element *c, const char *value)
891 fprintf_filtered (file,
892 _("The number of history entries to look back at for "
893 "duplicates is %s.\n"),
897 static char *history_filename;
899 show_history_filename (struct ui_file *file, int from_tty,
900 struct cmd_list_element *c, const char *value)
902 fprintf_filtered (file, _("The filename in which to record "
903 "the command history is \"%s\".\n"),
907 /* This is like readline(), but it has some gdb-specific behavior.
908 gdb may want readline in both the synchronous and async modes during
909 a single gdb invocation. At the ordinary top-level prompt we might
910 be using the async readline. That means we can't use
911 rl_pre_input_hook, since it doesn't work properly in async mode.
912 However, for a secondary prompt (" >", such as occurs during a
913 `define'), gdb wants a synchronous response.
915 We used to call readline() directly, running it in synchronous
916 mode. But mixing modes this way is not supported, and as of
917 readline 5.x it no longer works; the arrow keys come unbound during
918 the synchronous call. So we make a nested call into the event
919 loop. That's what gdb_readline_wrapper is for. */
921 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
922 rely on gdb_readline_wrapper_result, which might still be NULL if
923 the user types Control-D for EOF. */
924 static int gdb_readline_wrapper_done;
926 /* The result of the current call to gdb_readline_wrapper, once a newline
928 static char *gdb_readline_wrapper_result;
930 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
931 to be called after the newline is processed (which will redisplay
932 the prompt). But in gdb_readline_wrapper we will not get a new
933 prompt until the next call, or until we return to the event loop.
934 So we disable this hook around the newline and restore it before we
936 static void (*saved_after_char_processing_hook) (void);
942 gdb_in_secondary_prompt_p (struct ui *ui)
944 return ui->secondary_prompt_depth > 0;
948 /* This function is called when readline has seen a complete line of
952 gdb_readline_wrapper_line (char *line)
954 gdb_assert (!gdb_readline_wrapper_done);
955 gdb_readline_wrapper_result = line;
956 gdb_readline_wrapper_done = 1;
958 /* Prevent operate-and-get-next from acting too early. */
959 saved_after_char_processing_hook = after_char_processing_hook;
960 after_char_processing_hook = NULL;
962 /* Prevent parts of the prompt from being redisplayed if annotations
963 are enabled, and readline's state getting out of sync. We'll
964 reinstall the callback handler, which puts the terminal in raw
965 mode (or in readline lingo, in prepped state), when we're next
966 ready to process user input, either in display_gdb_prompt, or if
967 we're handling an asynchronous target event and running in the
968 background, just before returning to the event loop to process
969 further input (or more target events). */
970 if (current_ui->command_editing)
971 gdb_rl_callback_handler_remove ();
974 struct gdb_readline_wrapper_cleanup
976 void (*handler_orig) (char *);
977 int already_prompted_orig;
979 /* Whether the target was async. */
980 int target_is_async_orig;
984 gdb_readline_wrapper_cleanup (void *arg)
986 struct ui *ui = current_ui;
987 struct gdb_readline_wrapper_cleanup *cleanup
988 = (struct gdb_readline_wrapper_cleanup *) arg;
990 if (ui->command_editing)
991 rl_already_prompted = cleanup->already_prompted_orig;
993 gdb_assert (ui->input_handler == gdb_readline_wrapper_line);
994 ui->input_handler = cleanup->handler_orig;
996 /* Don't restore our input handler in readline yet. That would make
997 readline prep the terminal (putting it in raw mode), while the
998 line we just read may trigger execution of a command that expects
999 the terminal in the default cooked/canonical mode, such as e.g.,
1000 running Python's interactive online help utility. See
1001 gdb_readline_wrapper_line for when we'll reinstall it. */
1003 gdb_readline_wrapper_result = NULL;
1004 gdb_readline_wrapper_done = 0;
1005 ui->secondary_prompt_depth--;
1006 gdb_assert (ui->secondary_prompt_depth >= 0);
1008 after_char_processing_hook = saved_after_char_processing_hook;
1009 saved_after_char_processing_hook = NULL;
1011 if (cleanup->target_is_async_orig)
1018 gdb_readline_wrapper (const char *prompt)
1020 struct ui *ui = current_ui;
1021 struct cleanup *back_to;
1022 struct gdb_readline_wrapper_cleanup *cleanup;
1025 cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
1026 cleanup->handler_orig = ui->input_handler;
1027 ui->input_handler = gdb_readline_wrapper_line;
1029 if (ui->command_editing)
1030 cleanup->already_prompted_orig = rl_already_prompted;
1032 cleanup->already_prompted_orig = 0;
1034 cleanup->target_is_async_orig = target_is_async_p ();
1036 ui->secondary_prompt_depth++;
1037 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
1039 /* Processing events may change the current UI. */
1040 make_cleanup_restore_current_ui ();
1042 if (cleanup->target_is_async_orig)
1045 /* Display our prompt and prevent double prompt display. */
1046 display_gdb_prompt (prompt);
1047 if (ui->command_editing)
1048 rl_already_prompted = 1;
1050 if (after_char_processing_hook)
1051 (*after_char_processing_hook) ();
1052 gdb_assert (after_char_processing_hook == NULL);
1054 while (gdb_do_one_event () >= 0)
1055 if (gdb_readline_wrapper_done)
1058 retval = gdb_readline_wrapper_result;
1059 do_cleanups (back_to);
1064 /* The current saved history number from operate-and-get-next.
1065 This is -1 if not valid. */
1066 static int operate_saved_history = -1;
1068 /* This is put on the appropriate hook and helps operate-and-get-next
1071 gdb_rl_operate_and_get_next_completion (void)
1073 int delta = where_history () - operate_saved_history;
1075 /* The `key' argument to rl_get_previous_history is ignored. */
1076 rl_get_previous_history (delta, 0);
1077 operate_saved_history = -1;
1079 /* readline doesn't automatically update the display for us. */
1082 after_char_processing_hook = NULL;
1083 rl_pre_input_hook = NULL;
1086 /* This is a gdb-local readline command handler. It accepts the
1087 current command line (like RET does) and, if this command was taken
1088 from the history, arranges for the next command in the history to
1089 appear on the command line when the prompt returns.
1090 We ignore the arguments. */
1092 gdb_rl_operate_and_get_next (int count, int key)
1096 /* Use the async hook. */
1097 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
1099 /* Find the current line, and find the next line to use. */
1100 where = where_history();
1102 if ((history_is_stifled () && (history_length >= history_max_entries))
1103 || (where >= history_length - 1))
1104 operate_saved_history = where;
1106 operate_saved_history = where + 1;
1108 return rl_newline (1, key);
1111 /* Number of user commands executed during this session. */
1113 static int command_count = 0;
1115 /* Add the user command COMMAND to the input history list. */
1118 gdb_add_history (const char *command)
1122 if (history_remove_duplicates != 0)
1125 int lookbehind_threshold;
1127 /* The lookbehind threshold for finding a duplicate history entry is
1128 bounded by command_count because we can't meaningfully delete
1129 history entries that are already stored in the history file since
1130 the history file is appended to. */
1131 if (history_remove_duplicates == -1
1132 || history_remove_duplicates > command_count)
1133 lookbehind_threshold = command_count;
1135 lookbehind_threshold = history_remove_duplicates;
1138 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
1140 HIST_ENTRY *temp = previous_history ();
1145 if (strcmp (temp->line, command) == 0)
1147 HIST_ENTRY *prev = remove_history (where_history ());
1149 free_history_entry (prev);
1156 add_history (command);
1159 /* Safely append new history entries to the history file in a corruption-free
1160 way using an intermediate local history file. */
1163 gdb_safe_append_history (void)
1165 int ret, saved_errno;
1166 char *local_history_filename;
1167 struct cleanup *old_chain;
1169 local_history_filename
1170 = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
1171 old_chain = make_cleanup (xfree, local_history_filename);
1173 ret = rename (history_filename, local_history_filename);
1174 saved_errno = errno;
1175 if (ret < 0 && saved_errno != ENOENT)
1177 warning (_("Could not rename %s to %s: %s"),
1178 history_filename, local_history_filename,
1179 safe_strerror (saved_errno));
1185 /* If the rename failed with ENOENT then either the global history
1186 file never existed in the first place or another GDB process is
1187 currently appending to it (and has thus temporarily renamed it).
1188 Since we can't distinguish between these two cases, we have to
1189 conservatively assume the first case and therefore must write out
1190 (not append) our known history to our local history file and try
1191 to move it back anyway. Otherwise a global history file would
1192 never get created! */
1193 gdb_assert (saved_errno == ENOENT);
1194 write_history (local_history_filename);
1198 append_history (command_count, local_history_filename);
1199 if (history_is_stifled ())
1200 history_truncate_file (local_history_filename, history_max_entries);
1203 ret = rename (local_history_filename, history_filename);
1204 saved_errno = errno;
1205 if (ret < 0 && saved_errno != EEXIST)
1206 warning (_("Could not rename %s to %s: %s"),
1207 local_history_filename, history_filename,
1208 safe_strerror (saved_errno));
1211 do_cleanups (old_chain);
1214 /* Read one line from the command input stream `instream' into a local
1215 static buffer. The buffer is made bigger as necessary. Returns
1216 the address of the start of the line.
1218 NULL is returned for end of file.
1220 *If* input is from an interactive stream (stdin), the line read is
1221 copied into the global 'saved_command_line' so that it can be
1224 This routine either uses fancy command line editing or simple input
1225 as the user has requested. */
1228 command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
1230 static struct buffer cmd_line_buffer;
1231 static int cmd_line_buffer_initialized;
1232 struct ui *ui = current_ui;
1233 const char *prompt = prompt_arg;
1235 int from_tty = ui->instream == ui->stdin_stream;
1237 /* The annotation suffix must be non-NULL. */
1238 if (annotation_suffix == NULL)
1239 annotation_suffix = "";
1241 if (from_tty && annotation_level > 1)
1246 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1247 + strlen (annotation_suffix) + 40);
1249 local_prompt[0] = '\0';
1251 strcpy (local_prompt, prompt);
1252 strcat (local_prompt, "\n\032\032");
1253 strcat (local_prompt, annotation_suffix);
1254 strcat (local_prompt, "\n");
1256 prompt = local_prompt;
1259 if (!cmd_line_buffer_initialized)
1261 buffer_init (&cmd_line_buffer);
1262 cmd_line_buffer_initialized = 1;
1265 /* Starting a new command line. */
1266 cmd_line_buffer.used_size = 0;
1270 signal (STOP_SIGNAL, handle_stop_sig);
1277 /* Make sure that all output has been output. Some machines may
1278 let you get away with leaving out some of the gdb_flush, but
1281 gdb_flush (gdb_stdout);
1282 gdb_flush (gdb_stderr);
1284 if (source_file_name != NULL)
1285 ++source_line_number;
1287 if (from_tty && annotation_level > 1)
1289 puts_unfiltered ("\n\032\032pre-");
1290 puts_unfiltered (annotation_suffix);
1291 puts_unfiltered ("\n");
1294 /* Don't use fancy stuff if not talking to stdin. */
1295 if (deprecated_readline_hook
1297 && input_interactive_p (current_ui))
1299 rl = (*deprecated_readline_hook) (prompt);
1301 else if (command_editing_p
1303 && input_interactive_p (current_ui))
1305 rl = gdb_readline_wrapper (prompt);
1309 rl = gdb_readline_no_editing (prompt);
1312 cmd = handle_line_of_input (&cmd_line_buffer, rl,
1313 repeat, annotation_suffix);
1314 if (cmd == (char *) EOF)
1327 signal (STOP_SIGNAL, SIG_DFL);
1333 /* Print the GDB banner. */
1335 print_gdb_version (struct ui_file *stream)
1337 /* From GNU coding standards, first line is meant to be easy for a
1338 program to parse, and is just canonical program name and version
1339 number, which starts after last space. */
1341 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version);
1343 /* Second line is a copyright notice. */
1345 fprintf_filtered (stream,
1346 "Copyright (C) 2016 Free Software Foundation, Inc.\n");
1348 /* Following the copyright is a brief statement that the program is
1349 free software, that users are free to copy and change it on
1350 certain conditions, that it is covered by the GNU GPL, and that
1351 there is no warranty. */
1353 fprintf_filtered (stream, "\
1354 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1355 \nThis is free software: you are free to change and redistribute it.\n\
1356 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1357 and \"show warranty\" for details.\n");
1359 /* After the required info we print the configuration information. */
1361 fprintf_filtered (stream, "This GDB was configured as \"");
1362 if (strcmp (host_name, target_name) != 0)
1364 fprintf_filtered (stream, "--host=%s --target=%s",
1365 host_name, target_name);
1369 fprintf_filtered (stream, "%s", host_name);
1371 fprintf_filtered (stream, "\".\n\
1372 Type \"show configuration\" for configuration details.");
1374 if (REPORT_BUGS_TO[0])
1376 fprintf_filtered (stream,
1377 _("\nFor bug reporting instructions, please see:\n"));
1378 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1380 fprintf_filtered (stream,
1381 _("Find the GDB manual and other documentation \
1382 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1383 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1384 fprintf_filtered (stream, _("Type \"apropos word\" to search for \
1385 commands related to \"word\"."));
1388 /* Print the details of GDB build-time configuration. */
1390 print_gdb_configuration (struct ui_file *stream)
1392 fprintf_filtered (stream, _("\
1393 This GDB was configured as follows:\n\
1394 configure --host=%s --target=%s\n\
1395 "), host_name, target_name);
1396 fprintf_filtered (stream, _("\
1397 --with-auto-load-dir=%s\n\
1398 --with-auto-load-safe-path=%s\n\
1399 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1401 fprintf_filtered (stream, _("\
1405 fprintf_filtered (stream, _("\
1410 fprintf_filtered (stream, _("\
1411 --with-gdb-datadir=%s%s\n\
1412 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1414 fprintf_filtered (stream, _("\
1415 --with-iconv-bin=%s%s\n\
1416 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1418 if (JIT_READER_DIR[0])
1419 fprintf_filtered (stream, _("\
1420 --with-jit-reader-dir=%s%s\n\
1421 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1422 #if HAVE_LIBUNWIND_IA64_H
1423 fprintf_filtered (stream, _("\
1424 --with-libunwind-ia64\n\
1427 fprintf_filtered (stream, _("\
1428 --without-libunwind-ia64\n\
1432 fprintf_filtered (stream, _("\
1436 fprintf_filtered (stream, _("\
1440 #ifdef WITH_PYTHON_PATH
1441 fprintf_filtered (stream, _("\
1442 --with-python=%s%s\n\
1443 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1446 fprintf_filtered (stream, _("\
1450 fprintf_filtered (stream, _("\
1455 fprintf_filtered (stream, _("\
1456 --with-relocated-sources=%s\n\
1460 fprintf_filtered (stream, _("\
1461 --with-separate-debug-dir=%s%s\n\
1462 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1463 if (TARGET_SYSTEM_ROOT[0])
1464 fprintf_filtered (stream, _("\
1465 --with-sysroot=%s%s\n\
1466 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1467 if (SYSTEM_GDBINIT[0])
1468 fprintf_filtered (stream, _("\
1469 --with-system-gdbinit=%s%s\n\
1470 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1471 #if HAVE_LIBBABELTRACE
1472 fprintf_filtered (stream, _("\
1473 --with-babeltrace\n\
1476 fprintf_filtered (stream, _("\
1477 --without-babeltrace\n\
1480 /* We assume "relocatable" will be printed at least once, thus we always
1481 print this text. It's a reasonably safe assumption for now. */
1482 fprintf_filtered (stream, _("\n\
1483 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1484 tree, and GDB will still find it.)\n\
1489 /* The current top level prompt, settable with "set prompt", and/or
1490 with the python `gdb.prompt_hook' hook. */
1491 static char *top_prompt;
1493 /* Access method for the GDB prompt string. */
1501 /* Set method for the GDB prompt string. */
1504 set_prompt (const char *s)
1506 char *p = xstrdup (s);
1519 /* Callback for iterate_over_inferiors. Kills or detaches the given
1520 inferior, depending on how we originally gained control of it. */
1523 kill_or_detach (struct inferior *inf, void *args)
1525 struct qt_args *qt = (struct qt_args *) args;
1526 struct thread_info *thread;
1531 thread = any_thread_of_process (inf->pid);
1534 switch_to_thread (thread->ptid);
1536 /* Leave core files alone. */
1537 if (target_has_execution)
1539 if (inf->attach_flag)
1540 target_detach (qt->args, qt->from_tty);
1549 /* Callback for iterate_over_inferiors. Prints info about what GDB
1550 will do to each inferior on a "quit". ARG points to a struct
1551 ui_out where output is to be collected. */
1554 print_inferior_quit_action (struct inferior *inf, void *arg)
1556 struct ui_file *stb = (struct ui_file *) arg;
1561 if (inf->attach_flag)
1562 fprintf_filtered (stb,
1563 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1564 target_pid_to_str (pid_to_ptid (inf->pid)));
1566 fprintf_filtered (stb,
1567 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1568 target_pid_to_str (pid_to_ptid (inf->pid)));
1573 /* If necessary, make the user confirm that we should quit. Return
1574 non-zero if we should quit, zero if we shouldn't. */
1579 struct ui_file *stb;
1580 struct cleanup *old_chain;
1584 /* Don't even ask if we're only debugging a core file inferior. */
1585 if (!have_live_inferiors ())
1588 /* Build the query string as a single string. */
1589 stb = mem_fileopen ();
1590 old_chain = make_cleanup_ui_file_delete (stb);
1592 fprintf_filtered (stb, _("A debugging session is active.\n\n"));
1593 iterate_over_inferiors (print_inferior_quit_action, stb);
1594 fprintf_filtered (stb, _("\nQuit anyway? "));
1596 str = ui_file_xstrdup (stb, NULL);
1597 make_cleanup (xfree, str);
1599 qr = query ("%s", str);
1600 do_cleanups (old_chain);
1604 /* Prepare to exit GDB cleanly by undoing any changes made to the
1605 terminal so that we leave the terminal in the state we acquired it. */
1608 undo_terminal_modifications_before_exit (void)
1610 struct ui *saved_top_level = current_ui;
1612 target_terminal_ours ();
1614 current_ui = main_ui;
1619 gdb_disable_readline ();
1621 current_ui = saved_top_level;
1625 /* Quit without asking for confirmation. */
1628 quit_force (char *args, int from_tty)
1633 undo_terminal_modifications_before_exit ();
1635 /* An optional expression may be used to cause gdb to terminate with the
1636 value of that expression. */
1639 struct value *val = parse_and_eval (args);
1641 exit_code = (int) value_as_long (val);
1643 else if (return_child_result)
1644 exit_code = return_child_result_value;
1647 qt.from_tty = from_tty;
1649 /* We want to handle any quit errors and exit regardless. */
1651 /* Get out of tfind mode, and kill or detach all inferiors. */
1654 disconnect_tracing ();
1655 iterate_over_inferiors (kill_or_detach, &qt);
1657 CATCH (ex, RETURN_MASK_ALL)
1659 exception_print (gdb_stderr, ex);
1663 /* Give all pushed targets a chance to do minimal cleanup, and pop
1669 CATCH (ex, RETURN_MASK_ALL)
1671 exception_print (gdb_stderr, ex);
1675 /* Save the history information if it is appropriate to do so. */
1678 if (write_history_p && history_filename)
1683 /* History is currently shared between all UIs. If there's
1684 any UI with a terminal, save history. */
1687 if (input_interactive_p (ui))
1695 gdb_safe_append_history ();
1698 CATCH (ex, RETURN_MASK_ALL)
1700 exception_print (gdb_stderr, ex);
1704 /* Do any final cleanups before exiting. */
1707 do_final_cleanups (all_cleanups ());
1709 CATCH (ex, RETURN_MASK_ALL)
1711 exception_print (gdb_stderr, ex);
1718 /* The value of the "interactive-mode" setting. */
1719 static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO;
1721 /* Implement the "show interactive-mode" option. */
1724 show_interactive_mode (struct ui_file *file, int from_tty,
1725 struct cmd_list_element *c,
1728 if (interactive_mode == AUTO_BOOLEAN_AUTO)
1729 fprintf_filtered (file, "Debugger's interactive mode "
1730 "is %s (currently %s).\n",
1731 value, input_interactive_p (current_ui) ? "on" : "off");
1733 fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value);
1736 /* Returns whether GDB is running on an interactive terminal. */
1739 input_interactive_p (struct ui *ui)
1744 if (interactive_mode != AUTO_BOOLEAN_AUTO)
1745 return interactive_mode == AUTO_BOOLEAN_TRUE;
1747 return ui->input_interactive_p;
1751 dont_repeat_command (char *ignored, int from_tty)
1753 /* Can't call dont_repeat here because we're not necessarily reading
1755 *saved_command_line = 0;
1758 /* Functions to manipulate command line editing control variables. */
1760 /* Number of commands to print in each call to show_commands. */
1761 #define Hist_print 10
1763 show_commands (char *args, int from_tty)
1765 /* Index for history commands. Relative to history_base. */
1768 /* Number of the history entry which we are planning to display next.
1769 Relative to history_base. */
1772 /* Print out some of the commands from the command history. */
1776 if (args[0] == '+' && args[1] == '\0')
1777 /* "info editing +" should print from the stored position. */
1780 /* "info editing <exp>" should print around command number <exp>. */
1781 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1783 /* "show commands" means print the last Hist_print commands. */
1786 num = history_length - Hist_print;
1792 /* If there are at least Hist_print commands, we want to display the last
1793 Hist_print rather than, say, the last 6. */
1794 if (history_length - num < Hist_print)
1796 num = history_length - Hist_print;
1802 offset < num + Hist_print && offset < history_length;
1805 printf_filtered ("%5d %s\n", history_base + offset,
1806 (history_get (history_base + offset))->line);
1809 /* The next command we want to display is the next one that we haven't
1813 /* If the user repeats this command with return, it should do what
1814 "show commands +" does. This is unnecessary if arg is null,
1815 because "show commands +" is not useful after "show commands". */
1816 if (from_tty && args)
1823 /* Update the size of our command history file to HISTORY_SIZE.
1825 A HISTORY_SIZE of -1 stands for unlimited. */
1828 set_readline_history_size (int history_size)
1830 gdb_assert (history_size >= -1);
1832 if (history_size == -1)
1833 unstifle_history ();
1835 stifle_history (history_size);
1838 /* Called by do_setshow_command. */
1840 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
1842 set_readline_history_size (history_size_setshow_var);
1846 set_history (char *args, int from_tty)
1848 printf_unfiltered (_("\"set history\" must be followed "
1849 "by the name of a history subcommand.\n"));
1850 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1854 show_history (char *args, int from_tty)
1856 cmd_show_list (showhistlist, from_tty, "");
1859 int info_verbose = 0; /* Default verbose msgs off. */
1861 /* Called by do_setshow_command. An elaborate joke. */
1863 set_verbose (char *args, int from_tty, struct cmd_list_element *c)
1865 const char *cmdname = "verbose";
1866 struct cmd_list_element *showcmd;
1868 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1869 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1873 c->doc = "Set verbose printing of informational messages.";
1874 showcmd->doc = "Show verbose printing of informational messages.";
1878 c->doc = "Set verbosity.";
1879 showcmd->doc = "Show verbosity.";
1883 /* Init the history buffer. Note that we are called after the init file(s)
1884 have been read so that the user can change the history file via his
1885 .gdbinit file (for instance). The GDBHISTFILE environment variable
1886 overrides all of this. */
1893 tmpenv = getenv ("GDBHISTSIZE");
1900 tmpenv = skip_spaces (tmpenv);
1902 var = strtol (tmpenv, &endptr, 10);
1903 saved_errno = errno;
1904 endptr = skip_spaces (endptr);
1906 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1907 empty string, a negative number or a huge positive number (larger than
1908 INT_MAX) then set the history size to unlimited. Otherwise set our
1909 history size to the number we have read. This behavior is consistent
1910 with how bash handles HISTSIZE. */
1911 if (*endptr != '\0')
1913 else if (*tmpenv == '\0'
1916 /* On targets where INT_MAX == LONG_MAX, we have to look at
1917 errno after calling strtol to distinguish between a value that
1918 is exactly INT_MAX and an overflowing value that was clamped
1920 || (var == INT_MAX && saved_errno == ERANGE))
1921 history_size_setshow_var = -1;
1923 history_size_setshow_var = var;
1926 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1928 if (history_size_setshow_var == -2)
1929 history_size_setshow_var = 256;
1931 set_readline_history_size (history_size_setshow_var);
1933 tmpenv = getenv ("GDBHISTFILE");
1935 history_filename = xstrdup (tmpenv);
1936 else if (!history_filename)
1938 /* We include the current directory so that if the user changes
1939 directories the file written will be the same as the one
1942 /* No leading dots in file names are allowed on MSDOS. */
1943 history_filename = concat (current_directory, "/_gdb_history",
1946 history_filename = concat (current_directory, "/.gdb_history",
1950 read_history (history_filename);
1954 show_prompt (struct ui_file *file, int from_tty,
1955 struct cmd_list_element *c, const char *value)
1957 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1960 /* "set editing" command. */
1963 set_editing (char *args, int from_tty, struct cmd_list_element *c)
1965 change_line_handler (set_editing_cmd_var);
1966 /* Update the control variable so that MI's =cmd-param-changed event
1967 shows the correct value. */
1968 set_editing_cmd_var = current_ui->command_editing;
1972 show_editing (struct ui_file *file, int from_tty,
1973 struct cmd_list_element *c, const char *value)
1975 fprintf_filtered (file, _("Editing of command lines as "
1976 "they are typed is %s.\n"),
1977 current_ui->command_editing ? _("on") : _("off"));
1981 show_annotation_level (struct ui_file *file, int from_tty,
1982 struct cmd_list_element *c, const char *value)
1984 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1988 show_exec_done_display_p (struct ui_file *file, int from_tty,
1989 struct cmd_list_element *c, const char *value)
1991 fprintf_filtered (file, _("Notification of completion for "
1992 "asynchronous execution commands is %s.\n"),
1996 /* New values of the "data-directory" parameter are staged here. */
1997 static char *staged_gdb_datadir;
1999 /* "set" command for the gdb_datadir configuration variable. */
2002 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c)
2004 set_gdb_data_directory (staged_gdb_datadir);
2005 observer_notify_gdb_datadir_changed ();
2008 /* "show" command for the gdb_datadir configuration variable. */
2011 show_gdb_datadir (struct ui_file *file, int from_tty,
2012 struct cmd_list_element *c, const char *value)
2014 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
2019 set_history_filename (char *args, int from_tty, struct cmd_list_element *c)
2021 /* We include the current directory so that if the user changes
2022 directories the file written will be the same as the one
2024 if (!IS_ABSOLUTE_PATH (history_filename))
2025 history_filename = reconcat (history_filename, current_directory, "/",
2026 history_filename, (char *) NULL);
2032 struct cmd_list_element *c;
2034 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
2035 the DEFAULT_PROMPT is. */
2036 set_prompt (DEFAULT_PROMPT);
2038 /* Set the important stuff up for command editing. */
2039 command_editing_p = 1;
2040 history_expansion_p = 0;
2041 write_history_p = 0;
2043 /* Setup important stuff for command line editing. */
2044 rl_completion_word_break_hook = gdb_completion_word_break_characters;
2045 rl_completion_entry_function = readline_line_completion_function;
2046 rl_completer_word_break_characters = default_word_break_characters ();
2047 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
2048 rl_completion_display_matches_hook = cli_display_match_list;
2049 rl_readline_name = "gdb";
2050 rl_terminal_name = getenv ("TERM");
2052 /* The name for this defun comes from Bash, where it originated.
2053 15 is Control-o, the same binding this function has in Bash. */
2054 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
2056 add_setshow_string_cmd ("prompt", class_support,
2058 _("Set gdb's prompt"),
2059 _("Show gdb's prompt"),
2062 &setlist, &showlist);
2064 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
2065 Don't repeat this command.\nPrimarily \
2066 used inside of user-defined commands that should not be repeated when\n\
2069 add_setshow_boolean_cmd ("editing", class_support,
2070 &set_editing_cmd_var, _("\
2071 Set editing of command lines as they are typed."), _("\
2072 Show editing of command lines as they are typed."), _("\
2073 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2074 Without an argument, command line editing is enabled. To edit, use\n\
2075 EMACS-like or VI-like commands like control-P or ESC."),
2078 &setlist, &showlist);
2080 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
2081 Set saving of the history record on exit."), _("\
2082 Show saving of the history record on exit."), _("\
2083 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2084 Without an argument, saving is enabled."),
2086 show_write_history_p,
2087 &sethistlist, &showhistlist);
2089 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
2090 &history_size_setshow_var, _("\
2091 Set the size of the command history,"), _("\
2092 Show the size of the command history,"), _("\
2093 ie. the number of previous commands to keep a record of.\n\
2094 If set to \"unlimited\", the number of commands kept in the history\n\
2095 list is unlimited. This defaults to the value of the environment\n\
2096 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2097 set_history_size_command,
2099 &sethistlist, &showhistlist);
2101 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
2102 &history_remove_duplicates, _("\
2103 Set how far back in history to look for and remove duplicate entries."), _("\
2104 Show how far back in history to look for and remove duplicate entries."), _("\
2105 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2106 and remove the first history entry that is a duplicate of the most recent\n\
2107 entry, each time a new history entry is added.\n\
2108 If set to \"unlimited\", this lookbehind is unbounded.\n\
2109 Only history entries added during this session are considered for removal.\n\
2110 If set to 0, removal of duplicate history entries is disabled.\n\
2111 By default this option is set to 0."),
2113 show_history_remove_duplicates,
2114 &sethistlist, &showhistlist);
2116 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
2117 Set the filename in which to record the command history"), _("\
2118 Show the filename in which to record the command history"), _("\
2119 (the list of previous commands of which a record is kept)."),
2120 set_history_filename,
2121 show_history_filename,
2122 &sethistlist, &showhistlist);
2124 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
2125 Set whether to confirm potentially dangerous operations."), _("\
2126 Show whether to confirm potentially dangerous operations."), NULL,
2129 &setlist, &showlist);
2131 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
2132 Set annotation_level."), _("\
2133 Show annotation_level."), _("\
2134 0 == normal; 1 == fullname (for use when running under emacs)\n\
2135 2 == output annotated suitably for use by programs that control GDB."),
2137 show_annotation_level,
2138 &setlist, &showlist);
2140 add_setshow_boolean_cmd ("exec-done-display", class_support,
2141 &exec_done_display_p, _("\
2142 Set notification of completion for asynchronous execution commands."), _("\
2143 Show notification of completion for asynchronous execution commands."), _("\
2144 Use \"on\" to enable the notification, and \"off\" to disable it."),
2146 show_exec_done_display_p,
2147 &setlist, &showlist);
2149 add_setshow_filename_cmd ("data-directory", class_maintenance,
2150 &staged_gdb_datadir, _("Set GDB's data directory."),
2151 _("Show GDB's data directory."),
2153 When set, GDB uses the specified path to search for data files."),
2154 set_gdb_datadir, show_gdb_datadir,
2158 add_setshow_auto_boolean_cmd ("interactive-mode", class_support,
2159 &interactive_mode, _("\
2160 Set whether GDB's standard input is a terminal."), _("\
2161 Show whether GDB's standard input is a terminal."), _("\
2162 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2163 means that GDB should wait for the user to answer queries associated to\n\
2164 commands entered at the command prompt. If off, GDB assumes that standard\n\
2165 input is not a terminal, and uses the default answer to all queries.\n\
2166 If auto (the default), determine which mode to use based on the standard\n\
2169 show_interactive_mode,
2170 &setlist, &showlist);
2172 c = add_cmd ("new-ui", class_support, new_ui_command, _("\
2173 Create a new UI. It takes two arguments:\n\
2174 The first argument is the name of the interpreter to run.\n\
2175 The second argument is the terminal the UI runs on.\n"), &cmdlist);
2176 set_cmd_completer (c, interpreter_completer);
2180 gdb_init (char *argv0)
2182 if (pre_init_ui_hook)
2183 pre_init_ui_hook ();
2185 /* Run the init function of each source file. */
2188 /* Make sure we return to the original directory upon exit, come
2189 what may, since the OS doesn't do that for us. */
2190 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2193 init_cmd_lists (); /* This needs to be done first. */
2194 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2195 initialize_utils (); /* Make errors and warnings possible. */
2199 /* Here is where we call all the _initialize_foo routines. */
2200 initialize_all_files ();
2202 /* This creates the current_program_space. Do this after all the
2203 _initialize_foo routines have had a chance to install their
2204 per-sspace data keys. Also do this before
2205 initialize_current_architecture is called, because it accesses
2206 exec_bfd of the current program space. */
2207 initialize_progspace ();
2208 initialize_inferiors ();
2209 initialize_current_architecture ();
2211 init_main (); /* But that omits this file! Do it now. */
2213 initialize_stdin_serial ();
2215 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2217 set_initial_gdb_ttystate ();
2219 async_init_signals ();
2221 /* We need a default language for parsing expressions, so simple
2222 things like "set width 0" won't fail if no language is explicitly
2223 set in a config file or implicitly set by reading an executable
2225 set_language (language_c);
2226 expected_language = current_language; /* Don't warn about the change. */
2228 /* Python initialization, for example, can require various commands to be
2229 installed. For example "info pretty-printer" needs the "info"
2230 prefix to be installed. Keep things simple and just do final
2231 script initialization here. */
2232 finish_ext_lang_initialization ();