1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 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. */
38 #include "job-control.h"
40 #include "completer.h"
46 #include "event-loop.h"
47 #include "gdbthread.h"
48 #include "extension.h"
52 #include "filenames.h"
55 #include "gdb_select.h"
57 /* readline include files. */
58 #include "readline/readline.h"
59 #include "readline/history.h"
61 /* readline defines this. */
64 #include <sys/types.h>
66 #include "event-top.h"
71 #include "tracepoint.h"
82 extern void initialize_all_files (void);
84 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
85 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
86 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
88 /* Default command line prompt. This is overriden in some configs. */
90 #ifndef DEFAULT_PROMPT
91 #define DEFAULT_PROMPT "(gdb) "
94 /* Generate a function that exports a pointer to a field of the
97 #define gen_ret_current_ui_field_ptr(type, name) \
99 current_ui_## name ## _ptr (void) \
101 return ¤t_ui->m_ ## name; \
104 gen_ret_current_ui_field_ptr (struct ui_file
*, gdb_stdout
)
105 gen_ret_current_ui_field_ptr (struct ui_file
*, gdb_stdin
)
106 gen_ret_current_ui_field_ptr (struct ui_file
*, gdb_stderr
)
107 gen_ret_current_ui_field_ptr (struct ui_file
*, gdb_stdlog
)
108 gen_ret_current_ui_field_ptr (struct ui_out
*, current_uiout
)
110 /* Initialization file name for gdb. This is host-dependent. */
112 const char gdbinit
[] = GDBINIT
;
114 int inhibit_gdbinit
= 0;
116 extern char lang_frame_mismatch_warn
[]; /* language.c */
118 /* Flag for whether we want to confirm potentially dangerous
119 operations. Default is yes. */
124 show_confirm (struct ui_file
*file
, int from_tty
,
125 struct cmd_list_element
*c
, const char *value
)
127 fprintf_filtered (file
, _("Whether to confirm potentially "
128 "dangerous operations is %s.\n"),
132 /* Current working directory. */
134 char *current_directory
;
136 /* The directory name is actually stored here (usually). */
137 char gdb_dirbuf
[1024];
139 /* The last command line executed on the console. Used for command
141 char *saved_command_line
;
143 /* Nonzero if the current command is modified by "server ". This
144 affects things like recording into the command history, commands
145 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
146 whatever) can issue its own commands and also send along commands
147 from the user, and have the user not notice that the user interface
148 is issuing commands too. */
151 /* Timeout limit for response from target. */
153 /* The default value has been changed many times over the years. It
154 was originally 5 seconds. But that was thought to be a long time
155 to sit and wait, so it was changed to 2 seconds. That was thought
156 to be plenty unless the connection was going through some terminal
157 server or multiplexer or other form of hairy serial connection.
159 In mid-1996, remote_timeout was moved from remote.c to top.c and
160 it began being used in other remote-* targets. It appears that the
161 default was changed to 20 seconds at that time, perhaps because the
162 Renesas E7000 ICE didn't always respond in a timely manner.
164 But if 5 seconds is a long time to sit and wait for retransmissions,
165 20 seconds is far worse. This demonstrates the difficulty of using
166 a single variable for all protocol timeouts.
168 As remote.c is used much more than remote-e7000.c, it was changed
169 back to 2 seconds in 1999. */
171 int remote_timeout
= 2;
173 /* Non-zero tells remote* modules to output debugging info. */
175 int remote_debug
= 0;
177 /* Sbrk location on entry to main. Used for statistics only. */
182 /* Hooks for alternate command interfaces. */
184 /* This hook is called from within gdb's many mini-event loops which
185 could steal control from a real user interface's event loop. It
186 returns non-zero if the user is requesting a detach, zero
189 int (*deprecated_ui_loop_hook
) (int);
192 /* Called from print_frame_info to list the line we stopped in. */
194 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
,
198 /* Replaces most of query. */
200 int (*deprecated_query_hook
) (const char *, va_list);
202 /* Replaces most of warning. */
204 void (*deprecated_warning_hook
) (const char *, va_list);
206 /* These three functions support getting lines of text from the user.
207 They are used in sequence. First deprecated_readline_begin_hook is
208 called with a text string that might be (for example) a message for
209 the user to type in a sequence of commands to be executed at a
210 breakpoint. If this function calls back to a GUI, it might take
211 this opportunity to pop up a text interaction window with this
212 message. Next, deprecated_readline_hook is called with a prompt
213 that is emitted prior to collecting the user input. It can be
214 called multiple times. Finally, deprecated_readline_end_hook is
215 called to notify the GUI that we are done with the interaction
216 window and it can close it. */
218 void (*deprecated_readline_begin_hook
) (const char *, ...);
219 char *(*deprecated_readline_hook
) (const char *);
220 void (*deprecated_readline_end_hook
) (void);
222 /* Called as appropriate to notify the interface that we have attached
223 to or detached from an already running process. */
225 void (*deprecated_attach_hook
) (void);
226 void (*deprecated_detach_hook
) (void);
228 /* Called during long calculations to allow GUI to repair window
229 damage, and to check for stop buttons, etc... */
231 void (*deprecated_interactive_hook
) (void);
233 /* Called when going to wait for the target. Usually allows the GUI
234 to run while waiting for target events. */
236 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
237 struct target_waitstatus
*status
,
240 /* Used by UI as a wrapper around command execution. May do various
241 things like enabling/disabling buttons, etc... */
243 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
,
244 char *cmd
, int from_tty
);
246 /* Called when the current thread changes. Argument is thread id. */
248 void (*deprecated_context_hook
) (int id
);
250 /* The highest UI number ever assigned. */
251 static int highest_ui_num
;
256 new_ui (FILE *instream
, FILE *outstream
, FILE *errstream
)
260 ui
= XCNEW (struct ui
);
262 ui
->num
= ++highest_ui_num
;
263 ui
->stdin_stream
= instream
;
264 ui
->instream
= instream
;
265 ui
->outstream
= outstream
;
266 ui
->errstream
= errstream
;
268 ui
->input_fd
= fileno (ui
->instream
);
270 ui
->input_interactive_p
= ISATTY (ui
->instream
);
272 ui
->m_gdb_stdin
= new stdio_file (ui
->instream
);
273 ui
->m_gdb_stdout
= new stdio_file (ui
->outstream
);
274 ui
->m_gdb_stderr
= new stderr_file (ui
->errstream
);
275 ui
->m_gdb_stdlog
= ui
->m_gdb_stderr
;
277 ui
->prompt_state
= PROMPT_NEEDED
;
285 for (last
= ui_list
; last
->next
!= NULL
; last
= last
->next
)
294 free_ui (struct ui
*ui
)
296 delete ui
->m_gdb_stdin
;
297 delete ui
->m_gdb_stdout
;
298 delete ui
->m_gdb_stderr
;
304 delete_ui (struct ui
*todel
)
306 struct ui
*ui
, *uiprev
;
310 for (ui
= ui_list
; ui
!= NULL
; uiprev
= ui
, ui
= ui
->next
)
314 gdb_assert (ui
!= NULL
);
317 uiprev
->next
= ui
->next
;
324 /* Cleanup that deletes a UI. */
327 delete_ui_cleanup (void *void_ui
)
329 struct ui
*ui
= (struct ui
*) void_ui
;
337 make_delete_ui_cleanup (struct ui
*ui
)
339 return make_cleanup (delete_ui_cleanup
, ui
);
342 /* Open file named NAME for read/write, making sure not to make it the
343 controlling terminal. */
346 open_terminal_stream (const char *name
)
350 fd
= gdb_open_cloexec (name
, O_RDWR
| O_NOCTTY
, 0);
352 perror_with_name (_("opening terminal failed"));
354 return gdb_file_up (fdopen (fd
, "w+"));
357 /* Implementation of the "new-ui" command. */
360 new_ui_command (char *args
, int from_tty
)
363 struct interp
*interp
;
364 gdb_file_up stream
[3];
368 const char *interpreter_name
;
369 const char *tty_name
;
370 struct cleanup
*failure_chain
;
374 gdb_argv
argv (args
);
375 argc
= argv
.count ();
378 error (_("usage: new-ui <interpreter> <tty>"));
380 interpreter_name
= argv
[0];
384 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
386 /* Open specified terminal, once for each of
387 stdin/stdout/stderr. */
388 for (i
= 0; i
< 3; i
++)
389 stream
[i
] = open_terminal_stream (tty_name
);
391 ui
= new_ui (stream
[0].get (), stream
[1].get (), stream
[2].get ());
392 failure_chain
= make_cleanup (delete_ui_cleanup
, ui
);
398 set_top_level_interpreter (interpreter_name
);
400 interp_pre_command_loop (top_level_interpreter ());
402 /* Make sure the files are not closed. */
403 stream
[0].release ();
404 stream
[1].release ();
405 stream
[2].release ();
407 discard_cleanups (failure_chain
);
410 printf_unfiltered ("New UI allocated\n");
413 /* Handler for SIGHUP. */
416 /* NOTE 1999-04-29: This function will be static again, once we modify
417 gdb to use the event loop as the default command loop and we merge
418 event-top.c into this file, top.c. */
422 /* Stop asking user for confirmation --- we're exiting. This
423 prevents asking the user dumb questions. */
425 quit_command ((char *) 0, 0);
427 #endif /* defined SIGHUP */
429 /* Line number we are currently in, in a file which is being sourced. */
430 /* NOTE 1999-04-29: This variable will be static again, once we modify
431 gdb to use the event loop as the default command loop and we merge
432 event-top.c into this file, top.c. */
433 /* static */ int source_line_number
;
435 /* Name of the file we are sourcing. */
436 /* NOTE 1999-04-29: This variable will be static again, once we modify
437 gdb to use the event loop as the default command loop and we merge
438 event-top.c into this file, top.c. */
439 /* static */ const char *source_file_name
;
441 /* Read commands from STREAM. */
443 read_command_file (FILE *stream
)
445 struct ui
*ui
= current_ui
;
447 scoped_restore save_instream
448 = make_scoped_restore (&ui
->instream
, stream
);
450 /* Read commands from `instream' and execute them until end of file
451 or error reading instream. */
453 while (ui
->instream
!= NULL
&& !feof (ui
->instream
))
457 /* Get a command-line. This calls the readline package. */
458 command
= command_line_input (NULL
, 0, NULL
);
461 command_handler (command
);
465 void (*pre_init_ui_hook
) (void);
469 do_chdir_cleanup (void *old_dir
)
471 chdir ((const char *) old_dir
);
477 prepare_execute_command (void)
480 struct cleanup
*cleanup
;
482 mark
= value_mark ();
483 cleanup
= make_cleanup_value_free_to_mark (mark
);
485 /* With multiple threads running while the one we're examining is
486 stopped, the dcache can get stale without us being able to detect
487 it. For the duration of the command, though, use the dcache to
488 help things like backtrace. */
490 target_dcache_invalidate ();
495 /* Tell the user if the language has changed (except first time) after
496 executing a command. */
499 check_frame_language_change (void)
501 static int warned
= 0;
502 struct frame_info
*frame
;
504 /* First make sure that a new frame has been selected, in case the
505 command or the hooks changed the program state. */
506 frame
= deprecated_safe_get_selected_frame ();
507 if (current_language
!= expected_language
)
509 if (language_mode
== language_mode_auto
&& info_verbose
)
511 language_info (1); /* Print what changed. */
516 /* Warn the user if the working language does not match the language
517 of the current frame. Only warn the user if we are actually
518 running the program, i.e. there is a stack. */
519 /* FIXME: This should be cacheing the frame and only running when
520 the frame changes. */
522 if (has_stack_frames ())
526 flang
= get_frame_language (frame
);
528 && flang
!= language_unknown
529 && flang
!= current_language
->la_language
)
531 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
540 wait_sync_command_done (void)
542 /* Processing events may change the current UI. */
543 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
544 struct ui
*ui
= current_ui
;
546 while (gdb_do_one_event () >= 0)
547 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
554 maybe_wait_sync_command_done (int was_sync
)
556 /* If the interpreter is in sync mode (we're running a user
557 command's list, running command hooks or similars), and we
558 just ran a synchronous command that started the target, wait
559 for that command to end. */
560 if (!current_ui
->async
562 && current_ui
->prompt_state
== PROMPT_BLOCKED
)
563 wait_sync_command_done ();
566 /* Execute the line P as a command, in the current user context.
567 Pass FROM_TTY as second argument to the defining function. */
570 execute_command (char *p
, int from_tty
)
572 struct cleanup
*cleanup_if_error
, *cleanup
;
573 struct cmd_list_element
*c
;
576 cleanup_if_error
= make_bpstat_clear_actions_cleanup ();
577 cleanup
= prepare_execute_command ();
579 /* Force cleanup of any alloca areas if using C alloca instead of
583 /* This can happen when command_line_input hits end of file. */
586 do_cleanups (cleanup
);
587 discard_cleanups (cleanup_if_error
);
591 target_log_command (p
);
593 while (*p
== ' ' || *p
== '\t')
599 int was_sync
= current_ui
->prompt_state
== PROMPT_BLOCKED
;
603 /* If trace-commands is set then this will print this command. */
604 print_command_trace (p
);
606 c
= lookup_cmd (&cmd
, cmdlist
, "", 0, 1);
609 /* Pass null arg rather than an empty one. */
612 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
613 while the is_complete_command(cfunc) test is just plain
614 bogus. They should both be replaced by a test of the form
615 c->strip_trailing_white_space_p. */
616 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
617 can't be replaced with func. This is because it is the
618 cfunc, and not the func, that has the value that the
619 is_complete_command hack is testing for. */
620 /* Clear off trailing whitespace, except for set and complete
623 && c
->type
!= set_cmd
624 && !is_complete_command (c
))
626 p
= arg
+ strlen (arg
) - 1;
627 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
632 /* If this command has been pre-hooked, run the hook first. */
633 execute_cmd_pre_hook (c
);
635 if (c
->deprecated_warn_user
)
636 deprecated_cmd_warning (line
);
638 /* c->user_commands would be NULL in the case of a python command. */
639 if (c
->theclass
== class_user
&& c
->user_commands
)
640 execute_user_command (c
, arg
);
641 else if (c
->type
== set_cmd
)
642 do_set_command (arg
, from_tty
, c
);
643 else if (c
->type
== show_cmd
)
644 do_show_command (arg
, from_tty
, c
);
645 else if (!cmd_func_p (c
))
646 error (_("That is not a command, just a help topic."));
647 else if (deprecated_call_command_hook
)
648 deprecated_call_command_hook (c
, arg
, from_tty
);
650 cmd_func (c
, arg
, from_tty
);
652 maybe_wait_sync_command_done (was_sync
);
654 /* If this command has been post-hooked, run the hook last. */
655 execute_cmd_post_hook (c
);
659 check_frame_language_change ();
661 do_cleanups (cleanup
);
662 discard_cleanups (cleanup_if_error
);
665 /* Run execute_command for P and FROM_TTY. Capture its output into the
666 returned string, do not display it to the screen. BATCH_FLAG will be
667 temporarily set to true. */
670 execute_command_to_string (char *p
, int from_tty
)
672 struct cleanup
*cleanup
;
674 /* GDB_STDOUT should be better already restored during these
675 restoration callbacks. */
676 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
678 scoped_restore save_async
= make_scoped_restore (¤t_ui
->async
, 0);
680 string_file str_file
;
682 current_uiout
->redirect (&str_file
);
683 make_cleanup_ui_out_redirect_pop (current_uiout
);
685 scoped_restore save_stdout
686 = make_scoped_restore (&gdb_stdout
, &str_file
);
687 scoped_restore save_stderr
688 = make_scoped_restore (&gdb_stderr
, &str_file
);
689 scoped_restore save_stdlog
690 = make_scoped_restore (&gdb_stdlog
, &str_file
);
691 scoped_restore save_stdtarg
692 = make_scoped_restore (&gdb_stdtarg
, &str_file
);
693 scoped_restore save_stdtargerr
694 = make_scoped_restore (&gdb_stdtargerr
, &str_file
);
696 execute_command (p
, from_tty
);
698 do_cleanups (cleanup
);
700 return std::move (str_file
.string ());
704 /* When nonzero, cause dont_repeat to do nothing. This should only be
705 set via prevent_dont_repeat. */
707 static int suppress_dont_repeat
= 0;
709 /* Commands call this if they do not want to be repeated by null lines. */
714 struct ui
*ui
= current_ui
;
716 if (suppress_dont_repeat
|| server_command
)
719 /* If we aren't reading from standard input, we are saving the last
720 thing read from stdin in line and don't want to delete it. Null
721 lines won't repeat here in any case. */
722 if (ui
->instream
== ui
->stdin_stream
)
723 *saved_command_line
= 0;
726 /* Prevent dont_repeat from working, and return a cleanup that
727 restores the previous state. */
729 scoped_restore_tmpl
<int>
730 prevent_dont_repeat (void)
732 return make_scoped_restore (&suppress_dont_repeat
, 1);
736 /* Read a line from the stream "instream" without command line editing.
738 It prints PROMPT once at the start.
739 Action is compatible with "readline", e.g. space for the result is
740 malloc'd and should be freed by the caller.
742 A NULL return means end of file. */
745 gdb_readline_no_editing (const char *prompt
)
747 struct buffer line_buffer
;
748 struct ui
*ui
= current_ui
;
749 /* Read from stdin if we are executing a user defined command. This
750 is the right thing for prompt_for_continue, at least. */
751 FILE *stream
= ui
->instream
!= NULL
? ui
->instream
: stdin
;
752 int fd
= fileno (stream
);
754 buffer_init (&line_buffer
);
758 /* Don't use a _filtered function here. It causes the assumed
759 character position to be off, since the newline we read from
760 the user is not accounted for. */
761 fputs_unfiltered (prompt
, gdb_stdout
);
762 gdb_flush (gdb_stdout
);
773 /* Wait until at least one byte of data is available. Control-C
774 can interrupt interruptible_select, but not fgetc. */
776 FD_SET (fd
, &readfds
);
777 if (interruptible_select (fd
+ 1, &readfds
, NULL
, NULL
, NULL
) == -1)
781 /* If this was ctrl-c, the QUIT above handles it. */
784 perror_with_name (("select"));
791 if (line_buffer
.used_size
> 0)
792 /* The last line does not end with a newline. Return it, and
793 if we are called again fgetc will still return EOF and
794 we'll return NULL then. */
796 xfree (buffer_finish (&line_buffer
));
802 if (line_buffer
.used_size
> 0
803 && line_buffer
.buffer
[line_buffer
.used_size
- 1] == '\r')
804 line_buffer
.used_size
--;
808 buffer_grow_char (&line_buffer
, c
);
811 buffer_grow_char (&line_buffer
, '\0');
812 return buffer_finish (&line_buffer
);
815 /* Variables which control command line editing and history
816 substitution. These variables are given default values at the end
818 static int command_editing_p
;
820 /* NOTE 1999-04-29: This variable will be static again, once we modify
821 gdb to use the event loop as the default command loop and we merge
822 event-top.c into this file, top.c. */
824 /* static */ int history_expansion_p
;
826 static int write_history_p
;
828 show_write_history_p (struct ui_file
*file
, int from_tty
,
829 struct cmd_list_element
*c
, const char *value
)
831 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
835 /* The variable associated with the "set/show history size"
836 command. The value -1 means unlimited, and -2 means undefined. */
837 static int history_size_setshow_var
= -2;
840 show_history_size (struct ui_file
*file
, int from_tty
,
841 struct cmd_list_element
*c
, const char *value
)
843 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
847 /* Variable associated with the "history remove-duplicates" option.
848 The value -1 means unlimited. */
849 static int history_remove_duplicates
= 0;
852 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
853 struct cmd_list_element
*c
, const char *value
)
855 fprintf_filtered (file
,
856 _("The number of history entries to look back at for "
857 "duplicates is %s.\n"),
861 static char *history_filename
;
863 show_history_filename (struct ui_file
*file
, int from_tty
,
864 struct cmd_list_element
*c
, const char *value
)
866 fprintf_filtered (file
, _("The filename in which to record "
867 "the command history is \"%s\".\n"),
871 /* This is like readline(), but it has some gdb-specific behavior.
872 gdb may want readline in both the synchronous and async modes during
873 a single gdb invocation. At the ordinary top-level prompt we might
874 be using the async readline. That means we can't use
875 rl_pre_input_hook, since it doesn't work properly in async mode.
876 However, for a secondary prompt (" >", such as occurs during a
877 `define'), gdb wants a synchronous response.
879 We used to call readline() directly, running it in synchronous
880 mode. But mixing modes this way is not supported, and as of
881 readline 5.x it no longer works; the arrow keys come unbound during
882 the synchronous call. So we make a nested call into the event
883 loop. That's what gdb_readline_wrapper is for. */
885 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
886 rely on gdb_readline_wrapper_result, which might still be NULL if
887 the user types Control-D for EOF. */
888 static int gdb_readline_wrapper_done
;
890 /* The result of the current call to gdb_readline_wrapper, once a newline
892 static char *gdb_readline_wrapper_result
;
894 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
895 to be called after the newline is processed (which will redisplay
896 the prompt). But in gdb_readline_wrapper we will not get a new
897 prompt until the next call, or until we return to the event loop.
898 So we disable this hook around the newline and restore it before we
900 static void (*saved_after_char_processing_hook
) (void);
906 gdb_in_secondary_prompt_p (struct ui
*ui
)
908 return ui
->secondary_prompt_depth
> 0;
912 /* This function is called when readline has seen a complete line of
916 gdb_readline_wrapper_line (char *line
)
918 gdb_assert (!gdb_readline_wrapper_done
);
919 gdb_readline_wrapper_result
= line
;
920 gdb_readline_wrapper_done
= 1;
922 /* Prevent operate-and-get-next from acting too early. */
923 saved_after_char_processing_hook
= after_char_processing_hook
;
924 after_char_processing_hook
= NULL
;
926 /* Prevent parts of the prompt from being redisplayed if annotations
927 are enabled, and readline's state getting out of sync. We'll
928 reinstall the callback handler, which puts the terminal in raw
929 mode (or in readline lingo, in prepped state), when we're next
930 ready to process user input, either in display_gdb_prompt, or if
931 we're handling an asynchronous target event and running in the
932 background, just before returning to the event loop to process
933 further input (or more target events). */
934 if (current_ui
->command_editing
)
935 gdb_rl_callback_handler_remove ();
938 struct gdb_readline_wrapper_cleanup
940 void (*handler_orig
) (char *);
941 int already_prompted_orig
;
943 /* Whether the target was async. */
944 int target_is_async_orig
;
948 gdb_readline_wrapper_cleanup (void *arg
)
950 struct ui
*ui
= current_ui
;
951 struct gdb_readline_wrapper_cleanup
*cleanup
952 = (struct gdb_readline_wrapper_cleanup
*) arg
;
954 if (ui
->command_editing
)
955 rl_already_prompted
= cleanup
->already_prompted_orig
;
957 gdb_assert (ui
->input_handler
== gdb_readline_wrapper_line
);
958 ui
->input_handler
= cleanup
->handler_orig
;
960 /* Don't restore our input handler in readline yet. That would make
961 readline prep the terminal (putting it in raw mode), while the
962 line we just read may trigger execution of a command that expects
963 the terminal in the default cooked/canonical mode, such as e.g.,
964 running Python's interactive online help utility. See
965 gdb_readline_wrapper_line for when we'll reinstall it. */
967 gdb_readline_wrapper_result
= NULL
;
968 gdb_readline_wrapper_done
= 0;
969 ui
->secondary_prompt_depth
--;
970 gdb_assert (ui
->secondary_prompt_depth
>= 0);
972 after_char_processing_hook
= saved_after_char_processing_hook
;
973 saved_after_char_processing_hook
= NULL
;
975 if (cleanup
->target_is_async_orig
)
982 gdb_readline_wrapper (const char *prompt
)
984 struct ui
*ui
= current_ui
;
985 struct cleanup
*back_to
;
986 struct gdb_readline_wrapper_cleanup
*cleanup
;
989 cleanup
= XNEW (struct gdb_readline_wrapper_cleanup
);
990 cleanup
->handler_orig
= ui
->input_handler
;
991 ui
->input_handler
= gdb_readline_wrapper_line
;
993 if (ui
->command_editing
)
994 cleanup
->already_prompted_orig
= rl_already_prompted
;
996 cleanup
->already_prompted_orig
= 0;
998 cleanup
->target_is_async_orig
= target_is_async_p ();
1000 ui
->secondary_prompt_depth
++;
1001 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
1003 /* Processing events may change the current UI. */
1004 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
1006 if (cleanup
->target_is_async_orig
)
1009 /* Display our prompt and prevent double prompt display. Don't pass
1010 down a NULL prompt, since that has special meaning for
1011 display_gdb_prompt -- it indicates a request to print the primary
1012 prompt, while we want a secondary prompt here. */
1013 display_gdb_prompt (prompt
!= NULL
? prompt
: "");
1014 if (ui
->command_editing
)
1015 rl_already_prompted
= 1;
1017 if (after_char_processing_hook
)
1018 (*after_char_processing_hook
) ();
1019 gdb_assert (after_char_processing_hook
== NULL
);
1021 while (gdb_do_one_event () >= 0)
1022 if (gdb_readline_wrapper_done
)
1025 retval
= gdb_readline_wrapper_result
;
1026 do_cleanups (back_to
);
1031 /* The current saved history number from operate-and-get-next.
1032 This is -1 if not valid. */
1033 static int operate_saved_history
= -1;
1035 /* This is put on the appropriate hook and helps operate-and-get-next
1038 gdb_rl_operate_and_get_next_completion (void)
1040 int delta
= where_history () - operate_saved_history
;
1042 /* The `key' argument to rl_get_previous_history is ignored. */
1043 rl_get_previous_history (delta
, 0);
1044 operate_saved_history
= -1;
1046 /* readline doesn't automatically update the display for us. */
1049 after_char_processing_hook
= NULL
;
1050 rl_pre_input_hook
= NULL
;
1053 /* This is a gdb-local readline command handler. It accepts the
1054 current command line (like RET does) and, if this command was taken
1055 from the history, arranges for the next command in the history to
1056 appear on the command line when the prompt returns.
1057 We ignore the arguments. */
1059 gdb_rl_operate_and_get_next (int count
, int key
)
1063 /* Use the async hook. */
1064 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
1066 /* Find the current line, and find the next line to use. */
1067 where
= where_history();
1069 if ((history_is_stifled () && (history_length
>= history_max_entries
))
1070 || (where
>= history_length
- 1))
1071 operate_saved_history
= where
;
1073 operate_saved_history
= where
+ 1;
1075 return rl_newline (1, key
);
1078 /* Number of user commands executed during this session. */
1080 static int command_count
= 0;
1082 /* Add the user command COMMAND to the input history list. */
1085 gdb_add_history (const char *command
)
1089 if (history_remove_duplicates
!= 0)
1092 int lookbehind_threshold
;
1094 /* The lookbehind threshold for finding a duplicate history entry is
1095 bounded by command_count because we can't meaningfully delete
1096 history entries that are already stored in the history file since
1097 the history file is appended to. */
1098 if (history_remove_duplicates
== -1
1099 || history_remove_duplicates
> command_count
)
1100 lookbehind_threshold
= command_count
;
1102 lookbehind_threshold
= history_remove_duplicates
;
1105 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
1107 HIST_ENTRY
*temp
= previous_history ();
1112 if (strcmp (temp
->line
, command
) == 0)
1114 HIST_ENTRY
*prev
= remove_history (where_history ());
1116 free_history_entry (prev
);
1123 add_history (command
);
1126 /* Safely append new history entries to the history file in a corruption-free
1127 way using an intermediate local history file. */
1130 gdb_safe_append_history (void)
1132 int ret
, saved_errno
;
1133 char *local_history_filename
;
1134 struct cleanup
*old_chain
;
1136 local_history_filename
1137 = xstrprintf ("%s-gdb%ld~", history_filename
, (long) getpid ());
1138 old_chain
= make_cleanup (xfree
, local_history_filename
);
1140 ret
= rename (history_filename
, local_history_filename
);
1141 saved_errno
= errno
;
1142 if (ret
< 0 && saved_errno
!= ENOENT
)
1144 warning (_("Could not rename %s to %s: %s"),
1145 history_filename
, local_history_filename
,
1146 safe_strerror (saved_errno
));
1152 /* If the rename failed with ENOENT then either the global history
1153 file never existed in the first place or another GDB process is
1154 currently appending to it (and has thus temporarily renamed it).
1155 Since we can't distinguish between these two cases, we have to
1156 conservatively assume the first case and therefore must write out
1157 (not append) our known history to our local history file and try
1158 to move it back anyway. Otherwise a global history file would
1159 never get created! */
1160 gdb_assert (saved_errno
== ENOENT
);
1161 write_history (local_history_filename
);
1165 append_history (command_count
, local_history_filename
);
1166 if (history_is_stifled ())
1167 history_truncate_file (local_history_filename
, history_max_entries
);
1170 ret
= rename (local_history_filename
, history_filename
);
1171 saved_errno
= errno
;
1172 if (ret
< 0 && saved_errno
!= EEXIST
)
1173 warning (_("Could not rename %s to %s: %s"),
1174 local_history_filename
, history_filename
,
1175 safe_strerror (saved_errno
));
1178 do_cleanups (old_chain
);
1181 /* Read one line from the command input stream `instream' into a local
1182 static buffer. The buffer is made bigger as necessary. Returns
1183 the address of the start of the line.
1185 NULL is returned for end of file.
1187 *If* input is from an interactive stream (stdin), the line read is
1188 copied into the global 'saved_command_line' so that it can be
1191 This routine either uses fancy command line editing or simple input
1192 as the user has requested. */
1195 command_line_input (const char *prompt_arg
, int repeat
,
1196 const char *annotation_suffix
)
1198 static struct buffer cmd_line_buffer
;
1199 static int cmd_line_buffer_initialized
;
1200 struct ui
*ui
= current_ui
;
1201 const char *prompt
= prompt_arg
;
1203 int from_tty
= ui
->instream
== ui
->stdin_stream
;
1205 /* The annotation suffix must be non-NULL. */
1206 if (annotation_suffix
== NULL
)
1207 annotation_suffix
= "";
1209 if (from_tty
&& annotation_level
> 1)
1214 = (char *) alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1215 + strlen (annotation_suffix
) + 40);
1217 local_prompt
[0] = '\0';
1219 strcpy (local_prompt
, prompt
);
1220 strcat (local_prompt
, "\n\032\032");
1221 strcat (local_prompt
, annotation_suffix
);
1222 strcat (local_prompt
, "\n");
1224 prompt
= local_prompt
;
1227 if (!cmd_line_buffer_initialized
)
1229 buffer_init (&cmd_line_buffer
);
1230 cmd_line_buffer_initialized
= 1;
1233 /* Starting a new command line. */
1234 cmd_line_buffer
.used_size
= 0;
1238 signal (STOP_SIGNAL
, handle_stop_sig
);
1245 /* Make sure that all output has been output. Some machines may
1246 let you get away with leaving out some of the gdb_flush, but
1249 gdb_flush (gdb_stdout
);
1250 gdb_flush (gdb_stderr
);
1252 if (source_file_name
!= NULL
)
1253 ++source_line_number
;
1255 if (from_tty
&& annotation_level
> 1)
1257 puts_unfiltered ("\n\032\032pre-");
1258 puts_unfiltered (annotation_suffix
);
1259 puts_unfiltered ("\n");
1262 /* Don't use fancy stuff if not talking to stdin. */
1263 if (deprecated_readline_hook
1265 && input_interactive_p (current_ui
))
1267 rl
= (*deprecated_readline_hook
) (prompt
);
1269 else if (command_editing_p
1271 && input_interactive_p (current_ui
))
1273 rl
= gdb_readline_wrapper (prompt
);
1277 rl
= gdb_readline_no_editing (prompt
);
1280 cmd
= handle_line_of_input (&cmd_line_buffer
, rl
,
1281 repeat
, annotation_suffix
);
1282 if (cmd
== (char *) EOF
)
1290 /* Got partial input. I.e., got a line that ends with a
1291 continuation character (backslash). Suppress printing the
1298 signal (STOP_SIGNAL
, SIG_DFL
);
1304 /* Print the GDB banner. */
1306 print_gdb_version (struct ui_file
*stream
)
1308 /* From GNU coding standards, first line is meant to be easy for a
1309 program to parse, and is just canonical program name and version
1310 number, which starts after last space. */
1312 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1314 /* Second line is a copyright notice. */
1316 fprintf_filtered (stream
,
1317 "Copyright (C) 2017 Free Software Foundation, Inc.\n");
1319 /* Following the copyright is a brief statement that the program is
1320 free software, that users are free to copy and change it on
1321 certain conditions, that it is covered by the GNU GPL, and that
1322 there is no warranty. */
1324 fprintf_filtered (stream
, "\
1325 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1326 \nThis is free software: you are free to change and redistribute it.\n\
1327 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1328 and \"show warranty\" for details.\n");
1330 /* After the required info we print the configuration information. */
1332 fprintf_filtered (stream
, "This GDB was configured as \"");
1333 if (strcmp (host_name
, target_name
) != 0)
1335 fprintf_filtered (stream
, "--host=%s --target=%s",
1336 host_name
, target_name
);
1340 fprintf_filtered (stream
, "%s", host_name
);
1342 fprintf_filtered (stream
, "\".\n\
1343 Type \"show configuration\" for configuration details.");
1345 if (REPORT_BUGS_TO
[0])
1347 fprintf_filtered (stream
,
1348 _("\nFor bug reporting instructions, please see:\n"));
1349 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1351 fprintf_filtered (stream
,
1352 _("Find the GDB manual and other documentation \
1353 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1354 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1355 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1356 commands related to \"word\"."));
1359 /* Print the details of GDB build-time configuration. */
1361 print_gdb_configuration (struct ui_file
*stream
)
1363 fprintf_filtered (stream
, _("\
1364 This GDB was configured as follows:\n\
1365 configure --host=%s --target=%s\n\
1366 "), host_name
, target_name
);
1367 fprintf_filtered (stream
, _("\
1368 --with-auto-load-dir=%s\n\
1369 --with-auto-load-safe-path=%s\n\
1370 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1372 fprintf_filtered (stream
, _("\
1376 fprintf_filtered (stream
, _("\
1381 fprintf_filtered (stream
, _("\
1382 --with-gdb-datadir=%s%s\n\
1383 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1385 fprintf_filtered (stream
, _("\
1386 --with-iconv-bin=%s%s\n\
1387 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1389 if (JIT_READER_DIR
[0])
1390 fprintf_filtered (stream
, _("\
1391 --with-jit-reader-dir=%s%s\n\
1392 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1393 #if HAVE_LIBUNWIND_IA64_H
1394 fprintf_filtered (stream
, _("\
1395 --with-libunwind-ia64\n\
1398 fprintf_filtered (stream
, _("\
1399 --without-libunwind-ia64\n\
1403 fprintf_filtered (stream
, _("\
1407 fprintf_filtered (stream
, _("\
1411 #ifdef WITH_PYTHON_PATH
1412 fprintf_filtered (stream
, _("\
1413 --with-python=%s%s\n\
1414 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1417 fprintf_filtered (stream
, _("\
1421 fprintf_filtered (stream
, _("\
1426 fprintf_filtered (stream
, _("\
1427 --with-relocated-sources=%s\n\
1431 fprintf_filtered (stream
, _("\
1432 --with-separate-debug-dir=%s%s\n\
1433 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1434 if (TARGET_SYSTEM_ROOT
[0])
1435 fprintf_filtered (stream
, _("\
1436 --with-sysroot=%s%s\n\
1437 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1438 if (SYSTEM_GDBINIT
[0])
1439 fprintf_filtered (stream
, _("\
1440 --with-system-gdbinit=%s%s\n\
1441 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1442 #if HAVE_LIBBABELTRACE
1443 fprintf_filtered (stream
, _("\
1444 --with-babeltrace\n\
1447 fprintf_filtered (stream
, _("\
1448 --without-babeltrace\n\
1451 /* We assume "relocatable" will be printed at least once, thus we always
1452 print this text. It's a reasonably safe assumption for now. */
1453 fprintf_filtered (stream
, _("\n\
1454 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1455 tree, and GDB will still find it.)\n\
1460 /* The current top level prompt, settable with "set prompt", and/or
1461 with the python `gdb.prompt_hook' hook. */
1462 static char *top_prompt
;
1464 /* Access method for the GDB prompt string. */
1472 /* Set method for the GDB prompt string. */
1475 set_prompt (const char *s
)
1477 char *p
= xstrdup (s
);
1490 /* Callback for iterate_over_inferiors. Kills or detaches the given
1491 inferior, depending on how we originally gained control of it. */
1494 kill_or_detach (struct inferior
*inf
, void *args
)
1496 struct qt_args
*qt
= (struct qt_args
*) args
;
1497 struct thread_info
*thread
;
1502 thread
= any_thread_of_process (inf
->pid
);
1505 switch_to_thread (thread
->ptid
);
1507 /* Leave core files alone. */
1508 if (target_has_execution
)
1510 if (inf
->attach_flag
)
1511 target_detach (qt
->args
, qt
->from_tty
);
1520 /* Callback for iterate_over_inferiors. Prints info about what GDB
1521 will do to each inferior on a "quit". ARG points to a struct
1522 ui_out where output is to be collected. */
1525 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1527 struct ui_file
*stb
= (struct ui_file
*) arg
;
1532 if (inf
->attach_flag
)
1533 fprintf_filtered (stb
,
1534 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1535 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1537 fprintf_filtered (stb
,
1538 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1539 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1544 /* If necessary, make the user confirm that we should quit. Return
1545 non-zero if we should quit, zero if we shouldn't. */
1550 /* Don't even ask if we're only debugging a core file inferior. */
1551 if (!have_live_inferiors ())
1554 /* Build the query string as a single string. */
1557 stb
.puts (_("A debugging session is active.\n\n"));
1558 iterate_over_inferiors (print_inferior_quit_action
, &stb
);
1559 stb
.puts (_("\nQuit anyway? "));
1561 return query ("%s", stb
.c_str ());
1564 /* Prepare to exit GDB cleanly by undoing any changes made to the
1565 terminal so that we leave the terminal in the state we acquired it. */
1568 undo_terminal_modifications_before_exit (void)
1570 struct ui
*saved_top_level
= current_ui
;
1572 target_terminal_ours ();
1574 current_ui
= main_ui
;
1579 gdb_disable_readline ();
1581 current_ui
= saved_top_level
;
1585 /* Quit without asking for confirmation. */
1588 quit_force (int *exit_arg
, int from_tty
)
1593 undo_terminal_modifications_before_exit ();
1595 /* An optional expression may be used to cause gdb to terminate with the
1596 value of that expression. */
1598 exit_code
= *exit_arg
;
1599 else if (return_child_result
)
1600 exit_code
= return_child_result_value
;
1603 qt
.from_tty
= from_tty
;
1605 /* We want to handle any quit errors and exit regardless. */
1607 /* Get out of tfind mode, and kill or detach all inferiors. */
1610 disconnect_tracing ();
1611 iterate_over_inferiors (kill_or_detach
, &qt
);
1613 CATCH (ex
, RETURN_MASK_ALL
)
1615 exception_print (gdb_stderr
, ex
);
1619 /* Give all pushed targets a chance to do minimal cleanup, and pop
1625 CATCH (ex
, RETURN_MASK_ALL
)
1627 exception_print (gdb_stderr
, ex
);
1631 /* Save the history information if it is appropriate to do so. */
1634 if (write_history_p
&& history_filename
)
1639 /* History is currently shared between all UIs. If there's
1640 any UI with a terminal, save history. */
1643 if (input_interactive_p (ui
))
1651 gdb_safe_append_history ();
1654 CATCH (ex
, RETURN_MASK_ALL
)
1656 exception_print (gdb_stderr
, ex
);
1660 /* Do any final cleanups before exiting. */
1663 do_final_cleanups (all_cleanups ());
1665 CATCH (ex
, RETURN_MASK_ALL
)
1667 exception_print (gdb_stderr
, ex
);
1674 /* The value of the "interactive-mode" setting. */
1675 static enum auto_boolean interactive_mode
= AUTO_BOOLEAN_AUTO
;
1677 /* Implement the "show interactive-mode" option. */
1680 show_interactive_mode (struct ui_file
*file
, int from_tty
,
1681 struct cmd_list_element
*c
,
1684 if (interactive_mode
== AUTO_BOOLEAN_AUTO
)
1685 fprintf_filtered (file
, "Debugger's interactive mode "
1686 "is %s (currently %s).\n",
1687 value
, input_interactive_p (current_ui
) ? "on" : "off");
1689 fprintf_filtered (file
, "Debugger's interactive mode is %s.\n", value
);
1692 /* Returns whether GDB is running on an interactive terminal. */
1695 input_interactive_p (struct ui
*ui
)
1700 if (interactive_mode
!= AUTO_BOOLEAN_AUTO
)
1701 return interactive_mode
== AUTO_BOOLEAN_TRUE
;
1703 return ui
->input_interactive_p
;
1707 dont_repeat_command (char *ignored
, int from_tty
)
1709 /* Can't call dont_repeat here because we're not necessarily reading
1711 *saved_command_line
= 0;
1714 /* Functions to manipulate command line editing control variables. */
1716 /* Number of commands to print in each call to show_commands. */
1717 #define Hist_print 10
1719 show_commands (char *args
, int from_tty
)
1721 /* Index for history commands. Relative to history_base. */
1724 /* Number of the history entry which we are planning to display next.
1725 Relative to history_base. */
1728 /* Print out some of the commands from the command history. */
1732 if (args
[0] == '+' && args
[1] == '\0')
1733 /* "info editing +" should print from the stored position. */
1736 /* "info editing <exp>" should print around command number <exp>. */
1737 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1739 /* "show commands" means print the last Hist_print commands. */
1742 num
= history_length
- Hist_print
;
1748 /* If there are at least Hist_print commands, we want to display the last
1749 Hist_print rather than, say, the last 6. */
1750 if (history_length
- num
< Hist_print
)
1752 num
= history_length
- Hist_print
;
1758 offset
< num
+ Hist_print
&& offset
< history_length
;
1761 printf_filtered ("%5d %s\n", history_base
+ offset
,
1762 (history_get (history_base
+ offset
))->line
);
1765 /* The next command we want to display is the next one that we haven't
1769 /* If the user repeats this command with return, it should do what
1770 "show commands +" does. This is unnecessary if arg is null,
1771 because "show commands +" is not useful after "show commands". */
1772 if (from_tty
&& args
)
1779 /* Update the size of our command history file to HISTORY_SIZE.
1781 A HISTORY_SIZE of -1 stands for unlimited. */
1784 set_readline_history_size (int history_size
)
1786 gdb_assert (history_size
>= -1);
1788 if (history_size
== -1)
1789 unstifle_history ();
1791 stifle_history (history_size
);
1794 /* Called by do_setshow_command. */
1796 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1798 set_readline_history_size (history_size_setshow_var
);
1802 set_history (char *args
, int from_tty
)
1804 printf_unfiltered (_("\"set history\" must be followed "
1805 "by the name of a history subcommand.\n"));
1806 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1810 show_history (char *args
, int from_tty
)
1812 cmd_show_list (showhistlist
, from_tty
, "");
1815 int info_verbose
= 0; /* Default verbose msgs off. */
1817 /* Called by do_setshow_command. An elaborate joke. */
1819 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1821 const char *cmdname
= "verbose";
1822 struct cmd_list_element
*showcmd
;
1824 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1825 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1829 c
->doc
= "Set verbose printing of informational messages.";
1830 showcmd
->doc
= "Show verbose printing of informational messages.";
1834 c
->doc
= "Set verbosity.";
1835 showcmd
->doc
= "Show verbosity.";
1839 /* Init the history buffer. Note that we are called after the init file(s)
1840 have been read so that the user can change the history file via his
1841 .gdbinit file (for instance). The GDBHISTFILE environment variable
1842 overrides all of this. */
1849 tmpenv
= getenv ("GDBHISTSIZE");
1856 tmpenv
= skip_spaces (tmpenv
);
1858 var
= strtol (tmpenv
, &endptr
, 10);
1859 saved_errno
= errno
;
1860 endptr
= skip_spaces (endptr
);
1862 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1863 empty string, a negative number or a huge positive number (larger than
1864 INT_MAX) then set the history size to unlimited. Otherwise set our
1865 history size to the number we have read. This behavior is consistent
1866 with how bash handles HISTSIZE. */
1867 if (*endptr
!= '\0')
1869 else if (*tmpenv
== '\0'
1872 /* On targets where INT_MAX == LONG_MAX, we have to look at
1873 errno after calling strtol to distinguish between a value that
1874 is exactly INT_MAX and an overflowing value that was clamped
1876 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1877 history_size_setshow_var
= -1;
1879 history_size_setshow_var
= var
;
1882 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1884 if (history_size_setshow_var
== -2)
1885 history_size_setshow_var
= 256;
1887 set_readline_history_size (history_size_setshow_var
);
1889 tmpenv
= getenv ("GDBHISTFILE");
1891 history_filename
= xstrdup (tmpenv
);
1892 else if (!history_filename
)
1894 /* We include the current directory so that if the user changes
1895 directories the file written will be the same as the one
1898 /* No leading dots in file names are allowed on MSDOS. */
1899 history_filename
= concat (current_directory
, "/_gdb_history",
1902 history_filename
= concat (current_directory
, "/.gdb_history",
1906 read_history (history_filename
);
1910 show_prompt (struct ui_file
*file
, int from_tty
,
1911 struct cmd_list_element
*c
, const char *value
)
1913 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1916 /* "set editing" command. */
1919 set_editing (char *args
, int from_tty
, struct cmd_list_element
*c
)
1921 change_line_handler (set_editing_cmd_var
);
1922 /* Update the control variable so that MI's =cmd-param-changed event
1923 shows the correct value. */
1924 set_editing_cmd_var
= current_ui
->command_editing
;
1928 show_editing (struct ui_file
*file
, int from_tty
,
1929 struct cmd_list_element
*c
, const char *value
)
1931 fprintf_filtered (file
, _("Editing of command lines as "
1932 "they are typed is %s.\n"),
1933 current_ui
->command_editing
? _("on") : _("off"));
1937 show_annotation_level (struct ui_file
*file
, int from_tty
,
1938 struct cmd_list_element
*c
, const char *value
)
1940 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1944 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1945 struct cmd_list_element
*c
, const char *value
)
1947 fprintf_filtered (file
, _("Notification of completion for "
1948 "asynchronous execution commands is %s.\n"),
1952 /* New values of the "data-directory" parameter are staged here. */
1953 static char *staged_gdb_datadir
;
1955 /* "set" command for the gdb_datadir configuration variable. */
1958 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1960 set_gdb_data_directory (staged_gdb_datadir
);
1961 observer_notify_gdb_datadir_changed ();
1964 /* "show" command for the gdb_datadir configuration variable. */
1967 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
1968 struct cmd_list_element
*c
, const char *value
)
1970 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
1975 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
1977 /* We include the current directory so that if the user changes
1978 directories the file written will be the same as the one
1980 if (!IS_ABSOLUTE_PATH (history_filename
))
1981 history_filename
= reconcat (history_filename
, current_directory
, "/",
1982 history_filename
, (char *) NULL
);
1988 struct cmd_list_element
*c
;
1990 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
1991 the DEFAULT_PROMPT is. */
1992 set_prompt (DEFAULT_PROMPT
);
1994 /* Set the important stuff up for command editing. */
1995 command_editing_p
= 1;
1996 history_expansion_p
= 0;
1997 write_history_p
= 0;
1999 /* Setup important stuff for command line editing. */
2000 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
2001 rl_attempted_completion_function
= gdb_rl_attempted_completion_function
;
2002 set_rl_completer_word_break_characters (default_word_break_characters ());
2003 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
2004 rl_completion_display_matches_hook
= cli_display_match_list
;
2005 rl_readline_name
= "gdb";
2006 rl_terminal_name
= getenv ("TERM");
2008 /* The name for this defun comes from Bash, where it originated.
2009 15 is Control-o, the same binding this function has in Bash. */
2010 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
2012 add_setshow_string_cmd ("prompt", class_support
,
2014 _("Set gdb's prompt"),
2015 _("Show gdb's prompt"),
2018 &setlist
, &showlist
);
2020 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
2021 Don't repeat this command.\nPrimarily \
2022 used inside of user-defined commands that should not be repeated when\n\
2025 add_setshow_boolean_cmd ("editing", class_support
,
2026 &set_editing_cmd_var
, _("\
2027 Set editing of command lines as they are typed."), _("\
2028 Show editing of command lines as they are typed."), _("\
2029 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2030 Without an argument, command line editing is enabled. To edit, use\n\
2031 EMACS-like or VI-like commands like control-P or ESC."),
2034 &setlist
, &showlist
);
2036 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
2037 Set saving of the history record on exit."), _("\
2038 Show saving of the history record on exit."), _("\
2039 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2040 Without an argument, saving is enabled."),
2042 show_write_history_p
,
2043 &sethistlist
, &showhistlist
);
2045 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
2046 &history_size_setshow_var
, _("\
2047 Set the size of the command history,"), _("\
2048 Show the size of the command history,"), _("\
2049 ie. the number of previous commands to keep a record of.\n\
2050 If set to \"unlimited\", the number of commands kept in the history\n\
2051 list is unlimited. This defaults to the value of the environment\n\
2052 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2053 set_history_size_command
,
2055 &sethistlist
, &showhistlist
);
2057 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
2058 &history_remove_duplicates
, _("\
2059 Set how far back in history to look for and remove duplicate entries."), _("\
2060 Show how far back in history to look for and remove duplicate entries."), _("\
2061 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2062 and remove the first history entry that is a duplicate of the most recent\n\
2063 entry, each time a new history entry is added.\n\
2064 If set to \"unlimited\", this lookbehind is unbounded.\n\
2065 Only history entries added during this session are considered for removal.\n\
2066 If set to 0, removal of duplicate history entries is disabled.\n\
2067 By default this option is set to 0."),
2069 show_history_remove_duplicates
,
2070 &sethistlist
, &showhistlist
);
2072 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
2073 Set the filename in which to record the command history"), _("\
2074 Show the filename in which to record the command history"), _("\
2075 (the list of previous commands of which a record is kept)."),
2076 set_history_filename
,
2077 show_history_filename
,
2078 &sethistlist
, &showhistlist
);
2080 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
2081 Set whether to confirm potentially dangerous operations."), _("\
2082 Show whether to confirm potentially dangerous operations."), NULL
,
2085 &setlist
, &showlist
);
2087 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
2088 Set annotation_level."), _("\
2089 Show annotation_level."), _("\
2090 0 == normal; 1 == fullname (for use when running under emacs)\n\
2091 2 == output annotated suitably for use by programs that control GDB."),
2093 show_annotation_level
,
2094 &setlist
, &showlist
);
2096 add_setshow_boolean_cmd ("exec-done-display", class_support
,
2097 &exec_done_display_p
, _("\
2098 Set notification of completion for asynchronous execution commands."), _("\
2099 Show notification of completion for asynchronous execution commands."), _("\
2100 Use \"on\" to enable the notification, and \"off\" to disable it."),
2102 show_exec_done_display_p
,
2103 &setlist
, &showlist
);
2105 add_setshow_filename_cmd ("data-directory", class_maintenance
,
2106 &staged_gdb_datadir
, _("Set GDB's data directory."),
2107 _("Show GDB's data directory."),
2109 When set, GDB uses the specified path to search for data files."),
2110 set_gdb_datadir
, show_gdb_datadir
,
2114 add_setshow_auto_boolean_cmd ("interactive-mode", class_support
,
2115 &interactive_mode
, _("\
2116 Set whether GDB's standard input is a terminal."), _("\
2117 Show whether GDB's standard input is a terminal."), _("\
2118 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2119 means that GDB should wait for the user to answer queries associated to\n\
2120 commands entered at the command prompt. If off, GDB assumes that standard\n\
2121 input is not a terminal, and uses the default answer to all queries.\n\
2122 If auto (the default), determine which mode to use based on the standard\n\
2125 show_interactive_mode
,
2126 &setlist
, &showlist
);
2128 c
= add_cmd ("new-ui", class_support
, new_ui_command
, _("\
2129 Create a new UI. It takes two arguments:\n\
2130 The first argument is the name of the interpreter to run.\n\
2131 The second argument is the terminal the UI runs on.\n"), &cmdlist
);
2132 set_cmd_completer (c
, interpreter_completer
);
2136 gdb_init (char *argv0
)
2138 if (pre_init_ui_hook
)
2139 pre_init_ui_hook ();
2141 /* Run the init function of each source file. */
2144 /* Make sure we return to the original directory upon exit, come
2145 what may, since the OS doesn't do that for us. */
2146 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
2149 init_cmd_lists (); /* This needs to be done first. */
2150 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2151 initialize_utils (); /* Make errors and warnings possible. */
2155 /* Here is where we call all the _initialize_foo routines. */
2156 initialize_all_files ();
2158 /* This creates the current_program_space. Do this after all the
2159 _initialize_foo routines have had a chance to install their
2160 per-sspace data keys. Also do this before
2161 initialize_current_architecture is called, because it accesses
2162 exec_bfd of the current program space. */
2163 initialize_progspace ();
2164 initialize_inferiors ();
2165 initialize_current_architecture ();
2167 init_main (); /* But that omits this file! Do it now. */
2169 initialize_stdin_serial ();
2171 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2173 set_initial_gdb_ttystate ();
2175 async_init_signals ();
2177 /* We need a default language for parsing expressions, so simple
2178 things like "set width 0" won't fail if no language is explicitly
2179 set in a config file or implicitly set by reading an executable
2181 set_language (language_c
);
2182 expected_language
= current_language
; /* Don't warn about the change. */
2184 /* Python initialization, for example, can require various commands to be
2185 installed. For example "info pretty-printer" needs the "info"
2186 prefix to be installed. Keep things simple and just do final
2187 script initialization here. */
2188 finish_ext_lang_initialization ();