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. */
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];
390 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
392 failure_chain
= make_cleanup (null_cleanup
, NULL
);
394 /* Open specified terminal, once for each of
395 stdin/stdout/stderr. */
396 for (i
= 0; i
< 3; i
++)
398 stream
[i
] = open_terminal_stream (tty_name
);
399 make_cleanup_fclose (stream
[i
]);
402 ui
= new_ui (stream
[0], stream
[1], stream
[2]);
403 make_cleanup (delete_ui_cleanup
, ui
);
409 set_top_level_interpreter (interpreter_name
);
411 interp_pre_command_loop (top_level_interpreter ());
413 discard_cleanups (failure_chain
);
415 /* This restores the previous UI and frees argv. */
416 do_cleanups (success_chain
);
419 printf_unfiltered ("New UI allocated\n");
422 /* Handler for SIGHUP. */
425 /* NOTE 1999-04-29: This function will be static again, once we modify
426 gdb to use the event loop as the default command loop and we merge
427 event-top.c into this file, top.c. */
431 /* Stop asking user for confirmation --- we're exiting. This
432 prevents asking the user dumb questions. */
434 quit_command ((char *) 0, 0);
436 #endif /* defined SIGHUP */
438 /* Line number we are currently in, in a file which is being sourced. */
439 /* NOTE 1999-04-29: This variable will be static again, once we modify
440 gdb to use the event loop as the default command loop and we merge
441 event-top.c into this file, top.c. */
442 /* static */ int source_line_number
;
444 /* Name of the file we are sourcing. */
445 /* NOTE 1999-04-29: This variable will be static again, once we modify
446 gdb to use the event loop as the default command loop and we merge
447 event-top.c into this file, top.c. */
448 /* static */ const char *source_file_name
;
450 /* Clean up on error during a "source" command (or execution of a
451 user-defined command). */
454 do_restore_instream_cleanup (void *stream
)
456 struct ui
*ui
= current_ui
;
458 /* Restore the previous input stream. */
459 ui
->instream
= (FILE *) stream
;
462 /* Read commands from STREAM. */
464 read_command_file (FILE *stream
)
466 struct ui
*ui
= current_ui
;
467 struct cleanup
*cleanups
;
469 cleanups
= make_cleanup (do_restore_instream_cleanup
, ui
->instream
);
470 ui
->instream
= stream
;
472 /* Read commands from `instream' and execute them until end of file
473 or error reading instream. */
475 while (ui
->instream
!= NULL
&& !feof (ui
->instream
))
479 /* Get a command-line. This calls the readline package. */
480 command
= command_line_input (NULL
, 0, NULL
);
483 command_handler (command
);
486 do_cleanups (cleanups
);
489 void (*pre_init_ui_hook
) (void);
493 do_chdir_cleanup (void *old_dir
)
495 chdir ((const char *) old_dir
);
501 prepare_execute_command (void)
504 struct cleanup
*cleanup
;
506 mark
= value_mark ();
507 cleanup
= make_cleanup_value_free_to_mark (mark
);
509 /* With multiple threads running while the one we're examining is
510 stopped, the dcache can get stale without us being able to detect
511 it. For the duration of the command, though, use the dcache to
512 help things like backtrace. */
514 target_dcache_invalidate ();
519 /* Tell the user if the language has changed (except first time) after
520 executing a command. */
523 check_frame_language_change (void)
525 static int warned
= 0;
526 struct frame_info
*frame
;
528 /* First make sure that a new frame has been selected, in case the
529 command or the hooks changed the program state. */
530 frame
= deprecated_safe_get_selected_frame ();
531 if (current_language
!= expected_language
)
533 if (language_mode
== language_mode_auto
&& info_verbose
)
535 language_info (1); /* Print what changed. */
540 /* Warn the user if the working language does not match the language
541 of the current frame. Only warn the user if we are actually
542 running the program, i.e. there is a stack. */
543 /* FIXME: This should be cacheing the frame and only running when
544 the frame changes. */
546 if (has_stack_frames ())
550 flang
= get_frame_language (frame
);
552 && flang
!= language_unknown
553 && flang
!= current_language
->la_language
)
555 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
564 wait_sync_command_done (void)
566 /* Processing events may change the current UI. */
567 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
568 struct ui
*ui
= current_ui
;
570 while (gdb_do_one_event () >= 0)
571 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
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
;
699 /* GDB_STDOUT should be better already restored during these
700 restoration callbacks. */
701 cleanup
= set_batch_flag_and_make_cleanup_restore_page_info ();
703 scoped_restore save_async
= make_scoped_restore (¤t_ui
->async
, 0);
705 str_file
= mem_fileopen ();
707 make_cleanup_ui_file_delete (str_file
);
709 current_uiout
->redirect (str_file
);
710 make_cleanup_ui_out_redirect_pop (current_uiout
);
712 scoped_restore save_stdout
713 = make_scoped_restore (&gdb_stdout
, str_file
);
714 scoped_restore save_stderr
715 = make_scoped_restore (&gdb_stderr
, str_file
);
716 scoped_restore save_stdlog
717 = make_scoped_restore (&gdb_stdlog
, str_file
);
718 scoped_restore save_stdtarg
719 = make_scoped_restore (&gdb_stdtarg
, str_file
);
720 scoped_restore save_stdtargerr
721 = make_scoped_restore (&gdb_stdtargerr
, str_file
);
723 execute_command (p
, from_tty
);
725 std::string retval
= ui_file_as_string (str_file
);
727 do_cleanups (cleanup
);
733 /* When nonzero, cause dont_repeat to do nothing. This should only be
734 set via prevent_dont_repeat. */
736 static int suppress_dont_repeat
= 0;
738 /* Commands call this if they do not want to be repeated by null lines. */
743 struct ui
*ui
= current_ui
;
745 if (suppress_dont_repeat
|| server_command
)
748 /* If we aren't reading from standard input, we are saving the last
749 thing read from stdin in line and don't want to delete it. Null
750 lines won't repeat here in any case. */
751 if (ui
->instream
== ui
->stdin_stream
)
752 *saved_command_line
= 0;
755 /* Prevent dont_repeat from working, and return a cleanup that
756 restores the previous state. */
759 prevent_dont_repeat (void)
761 struct cleanup
*result
= make_cleanup_restore_integer (&suppress_dont_repeat
);
763 suppress_dont_repeat
= 1;
768 /* Read a line from the stream "instream" without command line editing.
770 It prints PROMPT once at the start.
771 Action is compatible with "readline", e.g. space for the result is
772 malloc'd and should be freed by the caller.
774 A NULL return means end of file. */
777 gdb_readline_no_editing (const char *prompt
)
779 struct buffer line_buffer
;
780 struct ui
*ui
= current_ui
;
781 /* Read from stdin if we are executing a user defined command. This
782 is the right thing for prompt_for_continue, at least. */
783 FILE *stream
= ui
->instream
!= NULL
? ui
->instream
: stdin
;
784 int fd
= fileno (stream
);
786 buffer_init (&line_buffer
);
790 /* Don't use a _filtered function here. It causes the assumed
791 character position to be off, since the newline we read from
792 the user is not accounted for. */
793 fputs_unfiltered (prompt
, gdb_stdout
);
794 gdb_flush (gdb_stdout
);
805 /* Wait until at least one byte of data is available. Control-C
806 can interrupt interruptible_select, but not fgetc. */
808 FD_SET (fd
, &readfds
);
809 if (interruptible_select (fd
+ 1, &readfds
, NULL
, NULL
, NULL
) == -1)
813 /* If this was ctrl-c, the QUIT above handles it. */
816 perror_with_name (("select"));
823 if (line_buffer
.used_size
> 0)
824 /* The last line does not end with a newline. Return it, and
825 if we are called again fgetc will still return EOF and
826 we'll return NULL then. */
828 xfree (buffer_finish (&line_buffer
));
834 if (line_buffer
.used_size
> 0
835 && line_buffer
.buffer
[line_buffer
.used_size
- 1] == '\r')
836 line_buffer
.used_size
--;
840 buffer_grow_char (&line_buffer
, c
);
843 buffer_grow_char (&line_buffer
, '\0');
844 return buffer_finish (&line_buffer
);
847 /* Variables which control command line editing and history
848 substitution. These variables are given default values at the end
850 static int command_editing_p
;
852 /* NOTE 1999-04-29: This variable will be static again, once we modify
853 gdb to use the event loop as the default command loop and we merge
854 event-top.c into this file, top.c. */
856 /* static */ int history_expansion_p
;
858 static int write_history_p
;
860 show_write_history_p (struct ui_file
*file
, int from_tty
,
861 struct cmd_list_element
*c
, const char *value
)
863 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
867 /* The variable associated with the "set/show history size"
868 command. The value -1 means unlimited, and -2 means undefined. */
869 static int history_size_setshow_var
= -2;
872 show_history_size (struct ui_file
*file
, int from_tty
,
873 struct cmd_list_element
*c
, const char *value
)
875 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
879 /* Variable associated with the "history remove-duplicates" option.
880 The value -1 means unlimited. */
881 static int history_remove_duplicates
= 0;
884 show_history_remove_duplicates (struct ui_file
*file
, int from_tty
,
885 struct cmd_list_element
*c
, const char *value
)
887 fprintf_filtered (file
,
888 _("The number of history entries to look back at for "
889 "duplicates is %s.\n"),
893 static char *history_filename
;
895 show_history_filename (struct ui_file
*file
, int from_tty
,
896 struct cmd_list_element
*c
, const char *value
)
898 fprintf_filtered (file
, _("The filename in which to record "
899 "the command history is \"%s\".\n"),
903 /* This is like readline(), but it has some gdb-specific behavior.
904 gdb may want readline in both the synchronous and async modes during
905 a single gdb invocation. At the ordinary top-level prompt we might
906 be using the async readline. That means we can't use
907 rl_pre_input_hook, since it doesn't work properly in async mode.
908 However, for a secondary prompt (" >", such as occurs during a
909 `define'), gdb wants a synchronous response.
911 We used to call readline() directly, running it in synchronous
912 mode. But mixing modes this way is not supported, and as of
913 readline 5.x it no longer works; the arrow keys come unbound during
914 the synchronous call. So we make a nested call into the event
915 loop. That's what gdb_readline_wrapper is for. */
917 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
918 rely on gdb_readline_wrapper_result, which might still be NULL if
919 the user types Control-D for EOF. */
920 static int gdb_readline_wrapper_done
;
922 /* The result of the current call to gdb_readline_wrapper, once a newline
924 static char *gdb_readline_wrapper_result
;
926 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
927 to be called after the newline is processed (which will redisplay
928 the prompt). But in gdb_readline_wrapper we will not get a new
929 prompt until the next call, or until we return to the event loop.
930 So we disable this hook around the newline and restore it before we
932 static void (*saved_after_char_processing_hook
) (void);
938 gdb_in_secondary_prompt_p (struct ui
*ui
)
940 return ui
->secondary_prompt_depth
> 0;
944 /* This function is called when readline has seen a complete line of
948 gdb_readline_wrapper_line (char *line
)
950 gdb_assert (!gdb_readline_wrapper_done
);
951 gdb_readline_wrapper_result
= line
;
952 gdb_readline_wrapper_done
= 1;
954 /* Prevent operate-and-get-next from acting too early. */
955 saved_after_char_processing_hook
= after_char_processing_hook
;
956 after_char_processing_hook
= NULL
;
958 /* Prevent parts of the prompt from being redisplayed if annotations
959 are enabled, and readline's state getting out of sync. We'll
960 reinstall the callback handler, which puts the terminal in raw
961 mode (or in readline lingo, in prepped state), when we're next
962 ready to process user input, either in display_gdb_prompt, or if
963 we're handling an asynchronous target event and running in the
964 background, just before returning to the event loop to process
965 further input (or more target events). */
966 if (current_ui
->command_editing
)
967 gdb_rl_callback_handler_remove ();
970 struct gdb_readline_wrapper_cleanup
972 void (*handler_orig
) (char *);
973 int already_prompted_orig
;
975 /* Whether the target was async. */
976 int target_is_async_orig
;
980 gdb_readline_wrapper_cleanup (void *arg
)
982 struct ui
*ui
= current_ui
;
983 struct gdb_readline_wrapper_cleanup
*cleanup
984 = (struct gdb_readline_wrapper_cleanup
*) arg
;
986 if (ui
->command_editing
)
987 rl_already_prompted
= cleanup
->already_prompted_orig
;
989 gdb_assert (ui
->input_handler
== gdb_readline_wrapper_line
);
990 ui
->input_handler
= cleanup
->handler_orig
;
992 /* Don't restore our input handler in readline yet. That would make
993 readline prep the terminal (putting it in raw mode), while the
994 line we just read may trigger execution of a command that expects
995 the terminal in the default cooked/canonical mode, such as e.g.,
996 running Python's interactive online help utility. See
997 gdb_readline_wrapper_line for when we'll reinstall it. */
999 gdb_readline_wrapper_result
= NULL
;
1000 gdb_readline_wrapper_done
= 0;
1001 ui
->secondary_prompt_depth
--;
1002 gdb_assert (ui
->secondary_prompt_depth
>= 0);
1004 after_char_processing_hook
= saved_after_char_processing_hook
;
1005 saved_after_char_processing_hook
= NULL
;
1007 if (cleanup
->target_is_async_orig
)
1014 gdb_readline_wrapper (const char *prompt
)
1016 struct ui
*ui
= current_ui
;
1017 struct cleanup
*back_to
;
1018 struct gdb_readline_wrapper_cleanup
*cleanup
;
1021 cleanup
= XNEW (struct gdb_readline_wrapper_cleanup
);
1022 cleanup
->handler_orig
= ui
->input_handler
;
1023 ui
->input_handler
= gdb_readline_wrapper_line
;
1025 if (ui
->command_editing
)
1026 cleanup
->already_prompted_orig
= rl_already_prompted
;
1028 cleanup
->already_prompted_orig
= 0;
1030 cleanup
->target_is_async_orig
= target_is_async_p ();
1032 ui
->secondary_prompt_depth
++;
1033 back_to
= make_cleanup (gdb_readline_wrapper_cleanup
, cleanup
);
1035 /* Processing events may change the current UI. */
1036 scoped_restore save_ui
= make_scoped_restore (¤t_ui
);
1038 if (cleanup
->target_is_async_orig
)
1041 /* Display our prompt and prevent double prompt display. */
1042 display_gdb_prompt (prompt
);
1043 if (ui
->command_editing
)
1044 rl_already_prompted
= 1;
1046 if (after_char_processing_hook
)
1047 (*after_char_processing_hook
) ();
1048 gdb_assert (after_char_processing_hook
== NULL
);
1050 while (gdb_do_one_event () >= 0)
1051 if (gdb_readline_wrapper_done
)
1054 retval
= gdb_readline_wrapper_result
;
1055 do_cleanups (back_to
);
1060 /* The current saved history number from operate-and-get-next.
1061 This is -1 if not valid. */
1062 static int operate_saved_history
= -1;
1064 /* This is put on the appropriate hook and helps operate-and-get-next
1067 gdb_rl_operate_and_get_next_completion (void)
1069 int delta
= where_history () - operate_saved_history
;
1071 /* The `key' argument to rl_get_previous_history is ignored. */
1072 rl_get_previous_history (delta
, 0);
1073 operate_saved_history
= -1;
1075 /* readline doesn't automatically update the display for us. */
1078 after_char_processing_hook
= NULL
;
1079 rl_pre_input_hook
= NULL
;
1082 /* This is a gdb-local readline command handler. It accepts the
1083 current command line (like RET does) and, if this command was taken
1084 from the history, arranges for the next command in the history to
1085 appear on the command line when the prompt returns.
1086 We ignore the arguments. */
1088 gdb_rl_operate_and_get_next (int count
, int key
)
1092 /* Use the async hook. */
1093 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
1095 /* Find the current line, and find the next line to use. */
1096 where
= where_history();
1098 if ((history_is_stifled () && (history_length
>= history_max_entries
))
1099 || (where
>= history_length
- 1))
1100 operate_saved_history
= where
;
1102 operate_saved_history
= where
+ 1;
1104 return rl_newline (1, key
);
1107 /* Number of user commands executed during this session. */
1109 static int command_count
= 0;
1111 /* Add the user command COMMAND to the input history list. */
1114 gdb_add_history (const char *command
)
1118 if (history_remove_duplicates
!= 0)
1121 int lookbehind_threshold
;
1123 /* The lookbehind threshold for finding a duplicate history entry is
1124 bounded by command_count because we can't meaningfully delete
1125 history entries that are already stored in the history file since
1126 the history file is appended to. */
1127 if (history_remove_duplicates
== -1
1128 || history_remove_duplicates
> command_count
)
1129 lookbehind_threshold
= command_count
;
1131 lookbehind_threshold
= history_remove_duplicates
;
1134 for (lookbehind
= 0; lookbehind
< lookbehind_threshold
; lookbehind
++)
1136 HIST_ENTRY
*temp
= previous_history ();
1141 if (strcmp (temp
->line
, command
) == 0)
1143 HIST_ENTRY
*prev
= remove_history (where_history ());
1145 free_history_entry (prev
);
1152 add_history (command
);
1155 /* Safely append new history entries to the history file in a corruption-free
1156 way using an intermediate local history file. */
1159 gdb_safe_append_history (void)
1161 int ret
, saved_errno
;
1162 char *local_history_filename
;
1163 struct cleanup
*old_chain
;
1165 local_history_filename
1166 = xstrprintf ("%s-gdb%ld~", history_filename
, (long) getpid ());
1167 old_chain
= make_cleanup (xfree
, local_history_filename
);
1169 ret
= rename (history_filename
, local_history_filename
);
1170 saved_errno
= errno
;
1171 if (ret
< 0 && saved_errno
!= ENOENT
)
1173 warning (_("Could not rename %s to %s: %s"),
1174 history_filename
, local_history_filename
,
1175 safe_strerror (saved_errno
));
1181 /* If the rename failed with ENOENT then either the global history
1182 file never existed in the first place or another GDB process is
1183 currently appending to it (and has thus temporarily renamed it).
1184 Since we can't distinguish between these two cases, we have to
1185 conservatively assume the first case and therefore must write out
1186 (not append) our known history to our local history file and try
1187 to move it back anyway. Otherwise a global history file would
1188 never get created! */
1189 gdb_assert (saved_errno
== ENOENT
);
1190 write_history (local_history_filename
);
1194 append_history (command_count
, local_history_filename
);
1195 if (history_is_stifled ())
1196 history_truncate_file (local_history_filename
, history_max_entries
);
1199 ret
= rename (local_history_filename
, history_filename
);
1200 saved_errno
= errno
;
1201 if (ret
< 0 && saved_errno
!= EEXIST
)
1202 warning (_("Could not rename %s to %s: %s"),
1203 local_history_filename
, history_filename
,
1204 safe_strerror (saved_errno
));
1207 do_cleanups (old_chain
);
1210 /* Read one line from the command input stream `instream' into a local
1211 static buffer. The buffer is made bigger as necessary. Returns
1212 the address of the start of the line.
1214 NULL is returned for end of file.
1216 *If* input is from an interactive stream (stdin), the line read is
1217 copied into the global 'saved_command_line' so that it can be
1220 This routine either uses fancy command line editing or simple input
1221 as the user has requested. */
1224 command_line_input (const char *prompt_arg
, int repeat
, char *annotation_suffix
)
1226 static struct buffer cmd_line_buffer
;
1227 static int cmd_line_buffer_initialized
;
1228 struct ui
*ui
= current_ui
;
1229 const char *prompt
= prompt_arg
;
1231 int from_tty
= ui
->instream
== ui
->stdin_stream
;
1233 /* The annotation suffix must be non-NULL. */
1234 if (annotation_suffix
== NULL
)
1235 annotation_suffix
= "";
1237 if (from_tty
&& annotation_level
> 1)
1242 = (char *) alloca ((prompt
== NULL
? 0 : strlen (prompt
))
1243 + strlen (annotation_suffix
) + 40);
1245 local_prompt
[0] = '\0';
1247 strcpy (local_prompt
, prompt
);
1248 strcat (local_prompt
, "\n\032\032");
1249 strcat (local_prompt
, annotation_suffix
);
1250 strcat (local_prompt
, "\n");
1252 prompt
= local_prompt
;
1255 if (!cmd_line_buffer_initialized
)
1257 buffer_init (&cmd_line_buffer
);
1258 cmd_line_buffer_initialized
= 1;
1261 /* Starting a new command line. */
1262 cmd_line_buffer
.used_size
= 0;
1266 signal (STOP_SIGNAL
, handle_stop_sig
);
1273 /* Make sure that all output has been output. Some machines may
1274 let you get away with leaving out some of the gdb_flush, but
1277 gdb_flush (gdb_stdout
);
1278 gdb_flush (gdb_stderr
);
1280 if (source_file_name
!= NULL
)
1281 ++source_line_number
;
1283 if (from_tty
&& annotation_level
> 1)
1285 puts_unfiltered ("\n\032\032pre-");
1286 puts_unfiltered (annotation_suffix
);
1287 puts_unfiltered ("\n");
1290 /* Don't use fancy stuff if not talking to stdin. */
1291 if (deprecated_readline_hook
1293 && input_interactive_p (current_ui
))
1295 rl
= (*deprecated_readline_hook
) (prompt
);
1297 else if (command_editing_p
1299 && input_interactive_p (current_ui
))
1301 rl
= gdb_readline_wrapper (prompt
);
1305 rl
= gdb_readline_no_editing (prompt
);
1308 cmd
= handle_line_of_input (&cmd_line_buffer
, rl
,
1309 repeat
, annotation_suffix
);
1310 if (cmd
== (char *) EOF
)
1323 signal (STOP_SIGNAL
, SIG_DFL
);
1329 /* Print the GDB banner. */
1331 print_gdb_version (struct ui_file
*stream
)
1333 /* From GNU coding standards, first line is meant to be easy for a
1334 program to parse, and is just canonical program name and version
1335 number, which starts after last space. */
1337 fprintf_filtered (stream
, "GNU gdb %s%s\n", PKGVERSION
, version
);
1339 /* Second line is a copyright notice. */
1341 fprintf_filtered (stream
,
1342 "Copyright (C) 2017 Free Software Foundation, Inc.\n");
1344 /* Following the copyright is a brief statement that the program is
1345 free software, that users are free to copy and change it on
1346 certain conditions, that it is covered by the GNU GPL, and that
1347 there is no warranty. */
1349 fprintf_filtered (stream
, "\
1350 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1351 \nThis is free software: you are free to change and redistribute it.\n\
1352 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
1353 and \"show warranty\" for details.\n");
1355 /* After the required info we print the configuration information. */
1357 fprintf_filtered (stream
, "This GDB was configured as \"");
1358 if (strcmp (host_name
, target_name
) != 0)
1360 fprintf_filtered (stream
, "--host=%s --target=%s",
1361 host_name
, target_name
);
1365 fprintf_filtered (stream
, "%s", host_name
);
1367 fprintf_filtered (stream
, "\".\n\
1368 Type \"show configuration\" for configuration details.");
1370 if (REPORT_BUGS_TO
[0])
1372 fprintf_filtered (stream
,
1373 _("\nFor bug reporting instructions, please see:\n"));
1374 fprintf_filtered (stream
, "%s.\n", REPORT_BUGS_TO
);
1376 fprintf_filtered (stream
,
1377 _("Find the GDB manual and other documentation \
1378 resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n"));
1379 fprintf_filtered (stream
, _("For help, type \"help\".\n"));
1380 fprintf_filtered (stream
, _("Type \"apropos word\" to search for \
1381 commands related to \"word\"."));
1384 /* Print the details of GDB build-time configuration. */
1386 print_gdb_configuration (struct ui_file
*stream
)
1388 fprintf_filtered (stream
, _("\
1389 This GDB was configured as follows:\n\
1390 configure --host=%s --target=%s\n\
1391 "), host_name
, target_name
);
1392 fprintf_filtered (stream
, _("\
1393 --with-auto-load-dir=%s\n\
1394 --with-auto-load-safe-path=%s\n\
1395 "), AUTO_LOAD_DIR
, AUTO_LOAD_SAFE_PATH
);
1397 fprintf_filtered (stream
, _("\
1401 fprintf_filtered (stream
, _("\
1406 fprintf_filtered (stream
, _("\
1407 --with-gdb-datadir=%s%s\n\
1408 "), GDB_DATADIR
, GDB_DATADIR_RELOCATABLE
? " (relocatable)" : "");
1410 fprintf_filtered (stream
, _("\
1411 --with-iconv-bin=%s%s\n\
1412 "), ICONV_BIN
, ICONV_BIN_RELOCATABLE
? " (relocatable)" : "");
1414 if (JIT_READER_DIR
[0])
1415 fprintf_filtered (stream
, _("\
1416 --with-jit-reader-dir=%s%s\n\
1417 "), JIT_READER_DIR
, JIT_READER_DIR_RELOCATABLE
? " (relocatable)" : "");
1418 #if HAVE_LIBUNWIND_IA64_H
1419 fprintf_filtered (stream
, _("\
1420 --with-libunwind-ia64\n\
1423 fprintf_filtered (stream
, _("\
1424 --without-libunwind-ia64\n\
1428 fprintf_filtered (stream
, _("\
1432 fprintf_filtered (stream
, _("\
1436 #ifdef WITH_PYTHON_PATH
1437 fprintf_filtered (stream
, _("\
1438 --with-python=%s%s\n\
1439 "), WITH_PYTHON_PATH
, PYTHON_PATH_RELOCATABLE
? " (relocatable)" : "");
1442 fprintf_filtered (stream
, _("\
1446 fprintf_filtered (stream
, _("\
1451 fprintf_filtered (stream
, _("\
1452 --with-relocated-sources=%s\n\
1456 fprintf_filtered (stream
, _("\
1457 --with-separate-debug-dir=%s%s\n\
1458 "), DEBUGDIR
, DEBUGDIR_RELOCATABLE
? " (relocatable)" : "");
1459 if (TARGET_SYSTEM_ROOT
[0])
1460 fprintf_filtered (stream
, _("\
1461 --with-sysroot=%s%s\n\
1462 "), TARGET_SYSTEM_ROOT
, TARGET_SYSTEM_ROOT_RELOCATABLE
? " (relocatable)" : "");
1463 if (SYSTEM_GDBINIT
[0])
1464 fprintf_filtered (stream
, _("\
1465 --with-system-gdbinit=%s%s\n\
1466 "), SYSTEM_GDBINIT
, SYSTEM_GDBINIT_RELOCATABLE
? " (relocatable)" : "");
1467 #if HAVE_LIBBABELTRACE
1468 fprintf_filtered (stream
, _("\
1469 --with-babeltrace\n\
1472 fprintf_filtered (stream
, _("\
1473 --without-babeltrace\n\
1476 /* We assume "relocatable" will be printed at least once, thus we always
1477 print this text. It's a reasonably safe assumption for now. */
1478 fprintf_filtered (stream
, _("\n\
1479 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1480 tree, and GDB will still find it.)\n\
1485 /* The current top level prompt, settable with "set prompt", and/or
1486 with the python `gdb.prompt_hook' hook. */
1487 static char *top_prompt
;
1489 /* Access method for the GDB prompt string. */
1497 /* Set method for the GDB prompt string. */
1500 set_prompt (const char *s
)
1502 char *p
= xstrdup (s
);
1515 /* Callback for iterate_over_inferiors. Kills or detaches the given
1516 inferior, depending on how we originally gained control of it. */
1519 kill_or_detach (struct inferior
*inf
, void *args
)
1521 struct qt_args
*qt
= (struct qt_args
*) args
;
1522 struct thread_info
*thread
;
1527 thread
= any_thread_of_process (inf
->pid
);
1530 switch_to_thread (thread
->ptid
);
1532 /* Leave core files alone. */
1533 if (target_has_execution
)
1535 if (inf
->attach_flag
)
1536 target_detach (qt
->args
, qt
->from_tty
);
1545 /* Callback for iterate_over_inferiors. Prints info about what GDB
1546 will do to each inferior on a "quit". ARG points to a struct
1547 ui_out where output is to be collected. */
1550 print_inferior_quit_action (struct inferior
*inf
, void *arg
)
1552 struct ui_file
*stb
= (struct ui_file
*) arg
;
1557 if (inf
->attach_flag
)
1558 fprintf_filtered (stb
,
1559 _("\tInferior %d [%s] will be detached.\n"), inf
->num
,
1560 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1562 fprintf_filtered (stb
,
1563 _("\tInferior %d [%s] will be killed.\n"), inf
->num
,
1564 target_pid_to_str (pid_to_ptid (inf
->pid
)));
1569 /* If necessary, make the user confirm that we should quit. Return
1570 non-zero if we should quit, zero if we shouldn't. */
1575 struct ui_file
*stb
;
1576 struct cleanup
*old_chain
;
1578 /* Don't even ask if we're only debugging a core file inferior. */
1579 if (!have_live_inferiors ())
1582 /* Build the query string as a single string. */
1583 stb
= mem_fileopen ();
1584 old_chain
= make_cleanup_ui_file_delete (stb
);
1586 fprintf_filtered (stb
, _("A debugging session is active.\n\n"));
1587 iterate_over_inferiors (print_inferior_quit_action
, stb
);
1588 fprintf_filtered (stb
, _("\nQuit anyway? "));
1590 std::string str
= ui_file_as_string (stb
);
1592 do_cleanups (old_chain
);
1594 return query ("%s", str
.c_str ());
1597 /* Prepare to exit GDB cleanly by undoing any changes made to the
1598 terminal so that we leave the terminal in the state we acquired it. */
1601 undo_terminal_modifications_before_exit (void)
1603 struct ui
*saved_top_level
= current_ui
;
1605 target_terminal_ours ();
1607 current_ui
= main_ui
;
1612 gdb_disable_readline ();
1614 current_ui
= saved_top_level
;
1618 /* Quit without asking for confirmation. */
1621 quit_force (int *exit_arg
, int from_tty
)
1626 undo_terminal_modifications_before_exit ();
1628 /* An optional expression may be used to cause gdb to terminate with the
1629 value of that expression. */
1631 exit_code
= *exit_arg
;
1632 else if (return_child_result
)
1633 exit_code
= return_child_result_value
;
1636 qt
.from_tty
= from_tty
;
1638 /* We want to handle any quit errors and exit regardless. */
1640 /* Get out of tfind mode, and kill or detach all inferiors. */
1643 disconnect_tracing ();
1644 iterate_over_inferiors (kill_or_detach
, &qt
);
1646 CATCH (ex
, RETURN_MASK_ALL
)
1648 exception_print (gdb_stderr
, ex
);
1652 /* Give all pushed targets a chance to do minimal cleanup, and pop
1658 CATCH (ex
, RETURN_MASK_ALL
)
1660 exception_print (gdb_stderr
, ex
);
1664 /* Save the history information if it is appropriate to do so. */
1667 if (write_history_p
&& history_filename
)
1672 /* History is currently shared between all UIs. If there's
1673 any UI with a terminal, save history. */
1676 if (input_interactive_p (ui
))
1684 gdb_safe_append_history ();
1687 CATCH (ex
, RETURN_MASK_ALL
)
1689 exception_print (gdb_stderr
, ex
);
1693 /* Do any final cleanups before exiting. */
1696 do_final_cleanups (all_cleanups ());
1698 CATCH (ex
, RETURN_MASK_ALL
)
1700 exception_print (gdb_stderr
, ex
);
1707 /* The value of the "interactive-mode" setting. */
1708 static enum auto_boolean interactive_mode
= AUTO_BOOLEAN_AUTO
;
1710 /* Implement the "show interactive-mode" option. */
1713 show_interactive_mode (struct ui_file
*file
, int from_tty
,
1714 struct cmd_list_element
*c
,
1717 if (interactive_mode
== AUTO_BOOLEAN_AUTO
)
1718 fprintf_filtered (file
, "Debugger's interactive mode "
1719 "is %s (currently %s).\n",
1720 value
, input_interactive_p (current_ui
) ? "on" : "off");
1722 fprintf_filtered (file
, "Debugger's interactive mode is %s.\n", value
);
1725 /* Returns whether GDB is running on an interactive terminal. */
1728 input_interactive_p (struct ui
*ui
)
1733 if (interactive_mode
!= AUTO_BOOLEAN_AUTO
)
1734 return interactive_mode
== AUTO_BOOLEAN_TRUE
;
1736 return ui
->input_interactive_p
;
1740 dont_repeat_command (char *ignored
, int from_tty
)
1742 /* Can't call dont_repeat here because we're not necessarily reading
1744 *saved_command_line
= 0;
1747 /* Functions to manipulate command line editing control variables. */
1749 /* Number of commands to print in each call to show_commands. */
1750 #define Hist_print 10
1752 show_commands (char *args
, int from_tty
)
1754 /* Index for history commands. Relative to history_base. */
1757 /* Number of the history entry which we are planning to display next.
1758 Relative to history_base. */
1761 /* Print out some of the commands from the command history. */
1765 if (args
[0] == '+' && args
[1] == '\0')
1766 /* "info editing +" should print from the stored position. */
1769 /* "info editing <exp>" should print around command number <exp>. */
1770 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1772 /* "show commands" means print the last Hist_print commands. */
1775 num
= history_length
- Hist_print
;
1781 /* If there are at least Hist_print commands, we want to display the last
1782 Hist_print rather than, say, the last 6. */
1783 if (history_length
- num
< Hist_print
)
1785 num
= history_length
- Hist_print
;
1791 offset
< num
+ Hist_print
&& offset
< history_length
;
1794 printf_filtered ("%5d %s\n", history_base
+ offset
,
1795 (history_get (history_base
+ offset
))->line
);
1798 /* The next command we want to display is the next one that we haven't
1802 /* If the user repeats this command with return, it should do what
1803 "show commands +" does. This is unnecessary if arg is null,
1804 because "show commands +" is not useful after "show commands". */
1805 if (from_tty
&& args
)
1812 /* Update the size of our command history file to HISTORY_SIZE.
1814 A HISTORY_SIZE of -1 stands for unlimited. */
1817 set_readline_history_size (int history_size
)
1819 gdb_assert (history_size
>= -1);
1821 if (history_size
== -1)
1822 unstifle_history ();
1824 stifle_history (history_size
);
1827 /* Called by do_setshow_command. */
1829 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1831 set_readline_history_size (history_size_setshow_var
);
1835 set_history (char *args
, int from_tty
)
1837 printf_unfiltered (_("\"set history\" must be followed "
1838 "by the name of a history subcommand.\n"));
1839 help_list (sethistlist
, "set history ", all_commands
, gdb_stdout
);
1843 show_history (char *args
, int from_tty
)
1845 cmd_show_list (showhistlist
, from_tty
, "");
1848 int info_verbose
= 0; /* Default verbose msgs off. */
1850 /* Called by do_setshow_command. An elaborate joke. */
1852 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1854 const char *cmdname
= "verbose";
1855 struct cmd_list_element
*showcmd
;
1857 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1858 gdb_assert (showcmd
!= NULL
&& showcmd
!= CMD_LIST_AMBIGUOUS
);
1862 c
->doc
= "Set verbose printing of informational messages.";
1863 showcmd
->doc
= "Show verbose printing of informational messages.";
1867 c
->doc
= "Set verbosity.";
1868 showcmd
->doc
= "Show verbosity.";
1872 /* Init the history buffer. Note that we are called after the init file(s)
1873 have been read so that the user can change the history file via his
1874 .gdbinit file (for instance). The GDBHISTFILE environment variable
1875 overrides all of this. */
1882 tmpenv
= getenv ("GDBHISTSIZE");
1889 tmpenv
= skip_spaces (tmpenv
);
1891 var
= strtol (tmpenv
, &endptr
, 10);
1892 saved_errno
= errno
;
1893 endptr
= skip_spaces (endptr
);
1895 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1896 empty string, a negative number or a huge positive number (larger than
1897 INT_MAX) then set the history size to unlimited. Otherwise set our
1898 history size to the number we have read. This behavior is consistent
1899 with how bash handles HISTSIZE. */
1900 if (*endptr
!= '\0')
1902 else if (*tmpenv
== '\0'
1905 /* On targets where INT_MAX == LONG_MAX, we have to look at
1906 errno after calling strtol to distinguish between a value that
1907 is exactly INT_MAX and an overflowing value that was clamped
1909 || (var
== INT_MAX
&& saved_errno
== ERANGE
))
1910 history_size_setshow_var
= -1;
1912 history_size_setshow_var
= var
;
1915 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1917 if (history_size_setshow_var
== -2)
1918 history_size_setshow_var
= 256;
1920 set_readline_history_size (history_size_setshow_var
);
1922 tmpenv
= getenv ("GDBHISTFILE");
1924 history_filename
= xstrdup (tmpenv
);
1925 else if (!history_filename
)
1927 /* We include the current directory so that if the user changes
1928 directories the file written will be the same as the one
1931 /* No leading dots in file names are allowed on MSDOS. */
1932 history_filename
= concat (current_directory
, "/_gdb_history",
1935 history_filename
= concat (current_directory
, "/.gdb_history",
1939 read_history (history_filename
);
1943 show_prompt (struct ui_file
*file
, int from_tty
,
1944 struct cmd_list_element
*c
, const char *value
)
1946 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1949 /* "set editing" command. */
1952 set_editing (char *args
, int from_tty
, struct cmd_list_element
*c
)
1954 change_line_handler (set_editing_cmd_var
);
1955 /* Update the control variable so that MI's =cmd-param-changed event
1956 shows the correct value. */
1957 set_editing_cmd_var
= current_ui
->command_editing
;
1961 show_editing (struct ui_file
*file
, int from_tty
,
1962 struct cmd_list_element
*c
, const char *value
)
1964 fprintf_filtered (file
, _("Editing of command lines as "
1965 "they are typed is %s.\n"),
1966 current_ui
->command_editing
? _("on") : _("off"));
1970 show_annotation_level (struct ui_file
*file
, int from_tty
,
1971 struct cmd_list_element
*c
, const char *value
)
1973 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1977 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1978 struct cmd_list_element
*c
, const char *value
)
1980 fprintf_filtered (file
, _("Notification of completion for "
1981 "asynchronous execution commands is %s.\n"),
1985 /* New values of the "data-directory" parameter are staged here. */
1986 static char *staged_gdb_datadir
;
1988 /* "set" command for the gdb_datadir configuration variable. */
1991 set_gdb_datadir (char *args
, int from_tty
, struct cmd_list_element
*c
)
1993 set_gdb_data_directory (staged_gdb_datadir
);
1994 observer_notify_gdb_datadir_changed ();
1997 /* "show" command for the gdb_datadir configuration variable. */
2000 show_gdb_datadir (struct ui_file
*file
, int from_tty
,
2001 struct cmd_list_element
*c
, const char *value
)
2003 fprintf_filtered (file
, _("GDB's data directory is \"%s\".\n"),
2008 set_history_filename (char *args
, int from_tty
, struct cmd_list_element
*c
)
2010 /* We include the current directory so that if the user changes
2011 directories the file written will be the same as the one
2013 if (!IS_ABSOLUTE_PATH (history_filename
))
2014 history_filename
= reconcat (history_filename
, current_directory
, "/",
2015 history_filename
, (char *) NULL
);
2021 struct cmd_list_element
*c
;
2023 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
2024 the DEFAULT_PROMPT is. */
2025 set_prompt (DEFAULT_PROMPT
);
2027 /* Set the important stuff up for command editing. */
2028 command_editing_p
= 1;
2029 history_expansion_p
= 0;
2030 write_history_p
= 0;
2032 /* Setup important stuff for command line editing. */
2033 rl_completion_word_break_hook
= gdb_completion_word_break_characters
;
2034 rl_completion_entry_function
= readline_line_completion_function
;
2035 rl_completer_word_break_characters
= default_word_break_characters ();
2036 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
2037 rl_completion_display_matches_hook
= cli_display_match_list
;
2038 rl_readline_name
= "gdb";
2039 rl_terminal_name
= getenv ("TERM");
2041 /* The name for this defun comes from Bash, where it originated.
2042 15 is Control-o, the same binding this function has in Bash. */
2043 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
2045 add_setshow_string_cmd ("prompt", class_support
,
2047 _("Set gdb's prompt"),
2048 _("Show gdb's prompt"),
2051 &setlist
, &showlist
);
2053 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
2054 Don't repeat this command.\nPrimarily \
2055 used inside of user-defined commands that should not be repeated when\n\
2058 add_setshow_boolean_cmd ("editing", class_support
,
2059 &set_editing_cmd_var
, _("\
2060 Set editing of command lines as they are typed."), _("\
2061 Show editing of command lines as they are typed."), _("\
2062 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2063 Without an argument, command line editing is enabled. To edit, use\n\
2064 EMACS-like or VI-like commands like control-P or ESC."),
2067 &setlist
, &showlist
);
2069 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
2070 Set saving of the history record on exit."), _("\
2071 Show saving of the history record on exit."), _("\
2072 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2073 Without an argument, saving is enabled."),
2075 show_write_history_p
,
2076 &sethistlist
, &showhistlist
);
2078 add_setshow_zuinteger_unlimited_cmd ("size", no_class
,
2079 &history_size_setshow_var
, _("\
2080 Set the size of the command history,"), _("\
2081 Show the size of the command history,"), _("\
2082 ie. the number of previous commands to keep a record of.\n\
2083 If set to \"unlimited\", the number of commands kept in the history\n\
2084 list is unlimited. This defaults to the value of the environment\n\
2085 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2086 set_history_size_command
,
2088 &sethistlist
, &showhistlist
);
2090 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class
,
2091 &history_remove_duplicates
, _("\
2092 Set how far back in history to look for and remove duplicate entries."), _("\
2093 Show how far back in history to look for and remove duplicate entries."), _("\
2094 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2095 and remove the first history entry that is a duplicate of the most recent\n\
2096 entry, each time a new history entry is added.\n\
2097 If set to \"unlimited\", this lookbehind is unbounded.\n\
2098 Only history entries added during this session are considered for removal.\n\
2099 If set to 0, removal of duplicate history entries is disabled.\n\
2100 By default this option is set to 0."),
2102 show_history_remove_duplicates
,
2103 &sethistlist
, &showhistlist
);
2105 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
2106 Set the filename in which to record the command history"), _("\
2107 Show the filename in which to record the command history"), _("\
2108 (the list of previous commands of which a record is kept)."),
2109 set_history_filename
,
2110 show_history_filename
,
2111 &sethistlist
, &showhistlist
);
2113 add_setshow_boolean_cmd ("confirm", class_support
, &confirm
, _("\
2114 Set whether to confirm potentially dangerous operations."), _("\
2115 Show whether to confirm potentially dangerous operations."), NULL
,
2118 &setlist
, &showlist
);
2120 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
2121 Set annotation_level."), _("\
2122 Show annotation_level."), _("\
2123 0 == normal; 1 == fullname (for use when running under emacs)\n\
2124 2 == output annotated suitably for use by programs that control GDB."),
2126 show_annotation_level
,
2127 &setlist
, &showlist
);
2129 add_setshow_boolean_cmd ("exec-done-display", class_support
,
2130 &exec_done_display_p
, _("\
2131 Set notification of completion for asynchronous execution commands."), _("\
2132 Show notification of completion for asynchronous execution commands."), _("\
2133 Use \"on\" to enable the notification, and \"off\" to disable it."),
2135 show_exec_done_display_p
,
2136 &setlist
, &showlist
);
2138 add_setshow_filename_cmd ("data-directory", class_maintenance
,
2139 &staged_gdb_datadir
, _("Set GDB's data directory."),
2140 _("Show GDB's data directory."),
2142 When set, GDB uses the specified path to search for data files."),
2143 set_gdb_datadir
, show_gdb_datadir
,
2147 add_setshow_auto_boolean_cmd ("interactive-mode", class_support
,
2148 &interactive_mode
, _("\
2149 Set whether GDB's standard input is a terminal."), _("\
2150 Show whether GDB's standard input is a terminal."), _("\
2151 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2152 means that GDB should wait for the user to answer queries associated to\n\
2153 commands entered at the command prompt. If off, GDB assumes that standard\n\
2154 input is not a terminal, and uses the default answer to all queries.\n\
2155 If auto (the default), determine which mode to use based on the standard\n\
2158 show_interactive_mode
,
2159 &setlist
, &showlist
);
2161 c
= add_cmd ("new-ui", class_support
, new_ui_command
, _("\
2162 Create a new UI. It takes two arguments:\n\
2163 The first argument is the name of the interpreter to run.\n\
2164 The second argument is the terminal the UI runs on.\n"), &cmdlist
);
2165 set_cmd_completer (c
, interpreter_completer
);
2169 gdb_init (char *argv0
)
2171 if (pre_init_ui_hook
)
2172 pre_init_ui_hook ();
2174 /* Run the init function of each source file. */
2177 /* Make sure we return to the original directory upon exit, come
2178 what may, since the OS doesn't do that for us. */
2179 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
2182 init_cmd_lists (); /* This needs to be done first. */
2183 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2184 initialize_utils (); /* Make errors and warnings possible. */
2188 /* Here is where we call all the _initialize_foo routines. */
2189 initialize_all_files ();
2191 /* This creates the current_program_space. Do this after all the
2192 _initialize_foo routines have had a chance to install their
2193 per-sspace data keys. Also do this before
2194 initialize_current_architecture is called, because it accesses
2195 exec_bfd of the current program space. */
2196 initialize_progspace ();
2197 initialize_inferiors ();
2198 initialize_current_architecture ();
2200 init_main (); /* But that omits this file! Do it now. */
2202 initialize_stdin_serial ();
2204 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2206 set_initial_gdb_ttystate ();
2208 async_init_signals ();
2210 /* We need a default language for parsing expressions, so simple
2211 things like "set width 0" won't fail if no language is explicitly
2212 set in a config file or implicitly set by reading an executable
2214 set_language (language_c
);
2215 expected_language
= current_language
; /* Don't warn about the change. */
2217 /* Python initialization, for example, can require various commands to be
2218 installed. For example "info pretty-printer" needs the "info"
2219 prefix to be installed. Keep things simple and just do final
2220 script initialization here. */
2221 finish_ext_lang_initialization ();