1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 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 "common/job-control.h"
40 #include "completer.h"
42 #include "common/version.h"
45 #include "event-loop.h"
46 #include "gdbthread.h"
47 #include "extension.h"
49 #include "observable.h"
51 #include "filenames.h"
53 #include "common/buffer.h"
54 #include "gdb_select.h"
55 #include "common/scope-exit.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 last command line executed on the console. Used for command
138 char *saved_command_line;
140 /* Nonzero if the current command is modified by "server ". This
141 affects things like recording into the command history, commands
142 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
143 whatever) can issue its own commands and also send along commands
144 from the user, and have the user not notice that the user interface
145 is issuing commands too. */
148 /* Timeout limit for response from target. */
150 /* The default value has been changed many times over the years. It
151 was originally 5 seconds. But that was thought to be a long time
152 to sit and wait, so it was changed to 2 seconds. That was thought
153 to be plenty unless the connection was going through some terminal
154 server or multiplexer or other form of hairy serial connection.
156 In mid-1996, remote_timeout was moved from remote.c to top.c and
157 it began being used in other remote-* targets. It appears that the
158 default was changed to 20 seconds at that time, perhaps because the
159 Renesas E7000 ICE didn't always respond in a timely manner.
161 But if 5 seconds is a long time to sit and wait for retransmissions,
162 20 seconds is far worse. This demonstrates the difficulty of using
163 a single variable for all protocol timeouts.
165 As remote.c is used much more than remote-e7000.c, it was changed
166 back to 2 seconds in 1999. */
168 int remote_timeout = 2;
170 /* Non-zero tells remote* modules to output debugging info. */
172 int remote_debug = 0;
174 /* Sbrk location on entry to main. Used for statistics only. */
175 #ifdef HAVE_USEFUL_SBRK
179 /* Hooks for alternate command interfaces. */
181 /* This hook is called from within gdb's many mini-event loops which
182 could steal control from a real user interface's event loop. It
183 returns non-zero if the user is requesting a detach, zero
186 int (*deprecated_ui_loop_hook) (int);
189 /* Called from print_frame_info to list the line we stopped in. */
191 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
195 /* Replaces most of query. */
197 int (*deprecated_query_hook) (const char *, va_list);
199 /* Replaces most of warning. */
201 void (*deprecated_warning_hook) (const char *, va_list);
203 /* These three functions support getting lines of text from the user.
204 They are used in sequence. First deprecated_readline_begin_hook is
205 called with a text string that might be (for example) a message for
206 the user to type in a sequence of commands to be executed at a
207 breakpoint. If this function calls back to a GUI, it might take
208 this opportunity to pop up a text interaction window with this
209 message. Next, deprecated_readline_hook is called with a prompt
210 that is emitted prior to collecting the user input. It can be
211 called multiple times. Finally, deprecated_readline_end_hook is
212 called to notify the GUI that we are done with the interaction
213 window and it can close it. */
215 void (*deprecated_readline_begin_hook) (const char *, ...);
216 char *(*deprecated_readline_hook) (const char *);
217 void (*deprecated_readline_end_hook) (void);
219 /* Called as appropriate to notify the interface that we have attached
220 to or detached from an already running process. */
222 void (*deprecated_attach_hook) (void);
223 void (*deprecated_detach_hook) (void);
225 /* Called during long calculations to allow GUI to repair window
226 damage, and to check for stop buttons, etc... */
228 void (*deprecated_interactive_hook) (void);
230 /* Called when going to wait for the target. Usually allows the GUI
231 to run while waiting for target events. */
233 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
234 struct target_waitstatus *status,
237 /* Used by UI as a wrapper around command execution. May do various
238 things like enabling/disabling buttons, etc... */
240 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
241 const char *cmd, int from_tty);
243 /* Called when the current thread changes. Argument is thread id. */
245 void (*deprecated_context_hook) (int id);
247 /* The highest UI number ever assigned. */
248 static int highest_ui_num;
252 ui::ui (FILE *instream_, FILE *outstream_, FILE *errstream_)
254 num (++highest_ui_num),
255 call_readline (nullptr),
256 input_handler (nullptr),
258 interp_info (nullptr),
260 secondary_prompt_depth (0),
261 stdin_stream (instream_),
262 instream (instream_),
263 outstream (outstream_),
264 errstream (errstream_),
265 input_fd (fileno (instream)),
266 input_interactive_p (ISATTY (instream)),
267 prompt_state (PROMPT_NEEDED),
268 m_gdb_stdout (new stdio_file (outstream)),
269 m_gdb_stdin (new stdio_file (instream)),
270 m_gdb_stderr (new stderr_file (errstream)),
271 m_gdb_stdlog (m_gdb_stderr),
272 m_current_uiout (nullptr)
274 buffer_init (&line_buffer);
282 for (last = ui_list; last->next != NULL; last = last->next)
290 struct ui *ui, *uiprev;
294 for (ui = ui_list; ui != NULL; uiprev = ui, ui = ui->next)
298 gdb_assert (ui != NULL);
310 /* Open file named NAME for read/write, making sure not to make it the
311 controlling terminal. */
314 open_terminal_stream (const char *name)
318 fd = gdb_open_cloexec (name, O_RDWR | O_NOCTTY, 0);
320 perror_with_name (_("opening terminal failed"));
322 return gdb_file_up (fdopen (fd, "w+"));
325 /* Implementation of the "new-ui" command. */
328 new_ui_command (const char *args, int from_tty)
330 gdb_file_up stream[3];
333 const char *interpreter_name;
334 const char *tty_name;
338 gdb_argv argv (args);
339 argc = argv.count ();
342 error (_("Usage: new-ui INTERPRETER TTY"));
344 interpreter_name = argv[0];
348 scoped_restore save_ui = make_scoped_restore (¤t_ui);
350 /* Open specified terminal, once for each of
351 stdin/stdout/stderr. */
352 for (i = 0; i < 3; i++)
353 stream[i] = open_terminal_stream (tty_name);
355 std::unique_ptr<ui> ui
356 (new struct ui (stream[0].get (), stream[1].get (), stream[2].get ()));
360 current_ui = ui.get ();
362 set_top_level_interpreter (interpreter_name);
364 interp_pre_command_loop (top_level_interpreter ());
366 /* Make sure the files are not closed. */
367 stream[0].release ();
368 stream[1].release ();
369 stream[2].release ();
374 printf_unfiltered ("New UI allocated\n");
377 /* Handler for SIGHUP. */
380 /* NOTE 1999-04-29: This function will be static again, once we modify
381 gdb to use the event loop as the default command loop and we merge
382 event-top.c into this file, top.c. */
386 /* Stop asking user for confirmation --- we're exiting. This
387 prevents asking the user dumb questions. */
389 quit_command ((char *) 0, 0);
391 #endif /* defined SIGHUP */
393 /* Line number we are currently in, in a file which is being sourced. */
394 /* NOTE 1999-04-29: This variable will be static again, once we modify
395 gdb to use the event loop as the default command loop and we merge
396 event-top.c into this file, top.c. */
397 /* static */ int source_line_number;
399 /* Name of the file we are sourcing. */
400 /* NOTE 1999-04-29: This variable will be static again, once we modify
401 gdb to use the event loop as the default command loop and we merge
402 event-top.c into this file, top.c. */
403 /* static */ std::string source_file_name;
405 /* Read commands from STREAM. */
407 read_command_file (FILE *stream)
409 struct ui *ui = current_ui;
411 scoped_restore save_instream
412 = make_scoped_restore (&ui->instream, stream);
414 /* Read commands from `instream' and execute them until end of file
415 or error reading instream. */
417 while (ui->instream != NULL && !feof (ui->instream))
421 /* Get a command-line. This calls the readline package. */
422 command = command_line_input (NULL, NULL);
425 command_handler (command);
429 void (*pre_init_ui_hook) (void);
433 do_chdir_cleanup (void *old_dir)
435 chdir ((const char *) old_dir);
441 prepare_execute_command ()
443 /* With multiple threads running while the one we're examining is
444 stopped, the dcache can get stale without us being able to detect
445 it. For the duration of the command, though, use the dcache to
446 help things like backtrace. */
448 target_dcache_invalidate ();
450 return scoped_value_mark ();
453 /* Tell the user if the language has changed (except first time) after
454 executing a command. */
457 check_frame_language_change (void)
459 static int warned = 0;
460 struct frame_info *frame;
462 /* First make sure that a new frame has been selected, in case the
463 command or the hooks changed the program state. */
464 frame = deprecated_safe_get_selected_frame ();
465 if (current_language != expected_language)
467 if (language_mode == language_mode_auto && info_verbose)
469 language_info (1); /* Print what changed. */
474 /* Warn the user if the working language does not match the language
475 of the current frame. Only warn the user if we are actually
476 running the program, i.e. there is a stack. */
477 /* FIXME: This should be cacheing the frame and only running when
478 the frame changes. */
480 if (has_stack_frames ())
484 flang = get_frame_language (frame);
486 && flang != language_unknown
487 && flang != current_language->la_language)
489 printf_filtered ("%s\n", lang_frame_mismatch_warn);
498 wait_sync_command_done (void)
500 /* Processing events may change the current UI. */
501 scoped_restore save_ui = make_scoped_restore (¤t_ui);
502 struct ui *ui = current_ui;
504 while (gdb_do_one_event () >= 0)
505 if (ui->prompt_state != PROMPT_BLOCKED)
512 maybe_wait_sync_command_done (int was_sync)
514 /* If the interpreter is in sync mode (we're running a user
515 command's list, running command hooks or similars), and we
516 just ran a synchronous command that started the target, wait
517 for that command to end. */
518 if (!current_ui->async
520 && current_ui->prompt_state == PROMPT_BLOCKED)
521 wait_sync_command_done ();
524 /* If not NULL, the arguments that should be passed if the current
525 command is repeated. */
527 static const char *repeat_arguments;
532 set_repeat_arguments (const char *args)
534 repeat_arguments = args;
537 /* Execute the line P as a command, in the current user context.
538 Pass FROM_TTY as second argument to the defining function. */
541 execute_command (const char *p, int from_tty)
543 struct cmd_list_element *c;
545 const char *cmd_start = p;
547 auto cleanup_if_error = make_scope_exit (bpstat_clear_actions);
548 scoped_value_mark cleanup = prepare_execute_command ();
550 /* Force cleanup of any alloca areas if using C alloca instead of
554 /* This can happen when command_line_input hits end of file. */
557 cleanup_if_error.release ();
561 target_log_command (p);
563 while (*p == ' ' || *p == '\t')
569 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
573 /* If trace-commands is set then this will print this command. */
574 print_command_trace ("%s", p);
576 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
579 scoped_restore save_repeat_args
580 = make_scoped_restore (&repeat_arguments, nullptr);
581 const char *args_pointer = p;
583 /* Pass null arg rather than an empty one. */
586 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
587 while the is_complete_command(cfunc) test is just plain
588 bogus. They should both be replaced by a test of the form
589 c->strip_trailing_white_space_p. */
590 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
591 can't be replaced with func. This is because it is the
592 cfunc, and not the func, that has the value that the
593 is_complete_command hack is testing for. */
594 /* Clear off trailing whitespace, except for set and complete
596 std::string without_whitespace;
598 && c->type != set_cmd
599 && !is_complete_command (c))
601 const char *old_end = arg + strlen (arg) - 1;
603 while (p >= arg && (*p == ' ' || *p == '\t'))
607 without_whitespace = std::string (arg, p + 1);
608 arg = without_whitespace.c_str ();
612 /* If this command has been pre-hooked, run the hook first. */
613 execute_cmd_pre_hook (c);
615 if (c->deprecated_warn_user)
616 deprecated_cmd_warning (line);
618 /* c->user_commands would be NULL in the case of a python command. */
619 if (c->theclass == class_user && c->user_commands)
620 execute_user_command (c, arg);
621 else if (c->type == set_cmd)
622 do_set_command (arg, from_tty, c);
623 else if (c->type == show_cmd)
624 do_show_command (arg, from_tty, c);
625 else if (!cmd_func_p (c))
626 error (_("That is not a command, just a help topic."));
627 else if (deprecated_call_command_hook)
628 deprecated_call_command_hook (c, arg, from_tty);
630 cmd_func (c, arg, from_tty);
632 maybe_wait_sync_command_done (was_sync);
634 /* If this command has been post-hooked, run the hook last. */
635 execute_cmd_post_hook (c);
637 if (repeat_arguments != NULL && cmd_start == saved_command_line)
639 gdb_assert (strlen (args_pointer) >= strlen (repeat_arguments));
640 strcpy (saved_command_line + (args_pointer - cmd_start),
645 /* Only perform the frame-language-change check if the command
646 we just finished executing did not resume the inferior's execution.
647 If it did resume the inferior, we will do that check after
648 the inferior stopped. */
649 if (has_stack_frames () && inferior_thread ()->state != THREAD_RUNNING)
650 check_frame_language_change ();
652 cleanup_if_error.release ();
655 /* Run execute_command for P and FROM_TTY. Capture its output into the
656 returned string, do not display it to the screen. BATCH_FLAG will be
657 temporarily set to true. */
660 execute_command_to_string (const char *p, int from_tty)
662 /* GDB_STDOUT should be better already restored during these
663 restoration callbacks. */
664 set_batch_flag_and_restore_page_info save_page_info;
666 scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0);
668 string_file str_file;
671 current_uiout->redirect (&str_file);
672 ui_out_redirect_pop redirect_popper (current_uiout);
674 scoped_restore save_stdout
675 = make_scoped_restore (&gdb_stdout, &str_file);
676 scoped_restore save_stderr
677 = make_scoped_restore (&gdb_stderr, &str_file);
678 scoped_restore save_stdlog
679 = make_scoped_restore (&gdb_stdlog, &str_file);
680 scoped_restore save_stdtarg
681 = make_scoped_restore (&gdb_stdtarg, &str_file);
682 scoped_restore save_stdtargerr
683 = make_scoped_restore (&gdb_stdtargerr, &str_file);
685 execute_command (p, from_tty);
688 return std::move (str_file.string ());
692 /* When nonzero, cause dont_repeat to do nothing. This should only be
693 set via prevent_dont_repeat. */
695 static int suppress_dont_repeat = 0;
697 /* Commands call this if they do not want to be repeated by null lines. */
702 struct ui *ui = current_ui;
704 if (suppress_dont_repeat || server_command)
707 /* If we aren't reading from standard input, we are saving the last
708 thing read from stdin in line and don't want to delete it. Null
709 lines won't repeat here in any case. */
710 if (ui->instream == ui->stdin_stream)
711 *saved_command_line = 0;
714 /* Prevent dont_repeat from working, and return a cleanup that
715 restores the previous state. */
717 scoped_restore_tmpl<int>
718 prevent_dont_repeat (void)
720 return make_scoped_restore (&suppress_dont_repeat, 1);
724 /* Read a line from the stream "instream" without command line editing.
726 It prints PROMPT once at the start.
727 Action is compatible with "readline", e.g. space for the result is
728 malloc'd and should be freed by the caller.
730 A NULL return means end of file. */
733 gdb_readline_no_editing (const char *prompt)
735 struct buffer line_buffer;
736 struct ui *ui = current_ui;
737 /* Read from stdin if we are executing a user defined command. This
738 is the right thing for prompt_for_continue, at least. */
739 FILE *stream = ui->instream != NULL ? ui->instream : stdin;
740 int fd = fileno (stream);
742 buffer_init (&line_buffer);
746 /* Don't use a _filtered function here. It causes the assumed
747 character position to be off, since the newline we read from
748 the user is not accounted for. */
749 fputs_unfiltered (prompt, gdb_stdout);
750 gdb_flush (gdb_stdout);
760 /* Wait until at least one byte of data is available. Control-C
761 can interrupt interruptible_select, but not fgetc. */
763 FD_SET (fd, &readfds);
764 if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
768 /* If this was ctrl-c, the QUIT above handles it. */
771 perror_with_name (("select"));
778 if (line_buffer.used_size > 0)
779 /* The last line does not end with a newline. Return it, and
780 if we are called again fgetc will still return EOF and
781 we'll return NULL then. */
783 xfree (buffer_finish (&line_buffer));
789 if (line_buffer.used_size > 0
790 && line_buffer.buffer[line_buffer.used_size - 1] == '\r')
791 line_buffer.used_size--;
795 buffer_grow_char (&line_buffer, c);
798 buffer_grow_char (&line_buffer, '\0');
799 return buffer_finish (&line_buffer);
802 /* Variables which control command line editing and history
803 substitution. These variables are given default values at the end
805 static int command_editing_p;
807 /* NOTE 1999-04-29: This variable will be static again, once we modify
808 gdb to use the event loop as the default command loop and we merge
809 event-top.c into this file, top.c. */
811 /* static */ int history_expansion_p;
813 static int write_history_p;
815 show_write_history_p (struct ui_file *file, int from_tty,
816 struct cmd_list_element *c, const char *value)
818 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
822 /* The variable associated with the "set/show history size"
823 command. The value -1 means unlimited, and -2 means undefined. */
824 static int history_size_setshow_var = -2;
827 show_history_size (struct ui_file *file, int from_tty,
828 struct cmd_list_element *c, const char *value)
830 fprintf_filtered (file, _("The size of the command history is %s.\n"),
834 /* Variable associated with the "history remove-duplicates" option.
835 The value -1 means unlimited. */
836 static int history_remove_duplicates = 0;
839 show_history_remove_duplicates (struct ui_file *file, int from_tty,
840 struct cmd_list_element *c, const char *value)
842 fprintf_filtered (file,
843 _("The number of history entries to look back at for "
844 "duplicates is %s.\n"),
848 static char *history_filename;
850 show_history_filename (struct ui_file *file, int from_tty,
851 struct cmd_list_element *c, const char *value)
853 fprintf_filtered (file, _("The filename in which to record "
854 "the command history is \"%s\".\n"),
858 /* This is like readline(), but it has some gdb-specific behavior.
859 gdb may want readline in both the synchronous and async modes during
860 a single gdb invocation. At the ordinary top-level prompt we might
861 be using the async readline. That means we can't use
862 rl_pre_input_hook, since it doesn't work properly in async mode.
863 However, for a secondary prompt (" >", such as occurs during a
864 `define'), gdb wants a synchronous response.
866 We used to call readline() directly, running it in synchronous
867 mode. But mixing modes this way is not supported, and as of
868 readline 5.x it no longer works; the arrow keys come unbound during
869 the synchronous call. So we make a nested call into the event
870 loop. That's what gdb_readline_wrapper is for. */
872 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
873 rely on gdb_readline_wrapper_result, which might still be NULL if
874 the user types Control-D for EOF. */
875 static int gdb_readline_wrapper_done;
877 /* The result of the current call to gdb_readline_wrapper, once a newline
879 static char *gdb_readline_wrapper_result;
881 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
882 to be called after the newline is processed (which will redisplay
883 the prompt). But in gdb_readline_wrapper we will not get a new
884 prompt until the next call, or until we return to the event loop.
885 So we disable this hook around the newline and restore it before we
887 static void (*saved_after_char_processing_hook) (void);
893 gdb_in_secondary_prompt_p (struct ui *ui)
895 return ui->secondary_prompt_depth > 0;
899 /* This function is called when readline has seen a complete line of
903 gdb_readline_wrapper_line (gdb::unique_xmalloc_ptr<char> &&line)
905 gdb_assert (!gdb_readline_wrapper_done);
906 gdb_readline_wrapper_result = line.release ();
907 gdb_readline_wrapper_done = 1;
909 /* Prevent operate-and-get-next from acting too early. */
910 saved_after_char_processing_hook = after_char_processing_hook;
911 after_char_processing_hook = NULL;
913 /* Prevent parts of the prompt from being redisplayed if annotations
914 are enabled, and readline's state getting out of sync. We'll
915 reinstall the callback handler, which puts the terminal in raw
916 mode (or in readline lingo, in prepped state), when we're next
917 ready to process user input, either in display_gdb_prompt, or if
918 we're handling an asynchronous target event and running in the
919 background, just before returning to the event loop to process
920 further input (or more target events). */
921 if (current_ui->command_editing)
922 gdb_rl_callback_handler_remove ();
925 class gdb_readline_wrapper_cleanup
928 gdb_readline_wrapper_cleanup ()
929 : m_handler_orig (current_ui->input_handler),
930 m_already_prompted_orig (current_ui->command_editing
931 ? rl_already_prompted : 0),
932 m_target_is_async_orig (target_is_async_p ()),
933 m_save_ui (¤t_ui)
935 current_ui->input_handler = gdb_readline_wrapper_line;
936 current_ui->secondary_prompt_depth++;
938 if (m_target_is_async_orig)
942 ~gdb_readline_wrapper_cleanup ()
944 struct ui *ui = current_ui;
946 if (ui->command_editing)
947 rl_already_prompted = m_already_prompted_orig;
949 gdb_assert (ui->input_handler == gdb_readline_wrapper_line);
950 ui->input_handler = m_handler_orig;
952 /* Don't restore our input handler in readline yet. That would make
953 readline prep the terminal (putting it in raw mode), while the
954 line we just read may trigger execution of a command that expects
955 the terminal in the default cooked/canonical mode, such as e.g.,
956 running Python's interactive online help utility. See
957 gdb_readline_wrapper_line for when we'll reinstall it. */
959 gdb_readline_wrapper_result = NULL;
960 gdb_readline_wrapper_done = 0;
961 ui->secondary_prompt_depth--;
962 gdb_assert (ui->secondary_prompt_depth >= 0);
964 after_char_processing_hook = saved_after_char_processing_hook;
965 saved_after_char_processing_hook = NULL;
967 if (m_target_is_async_orig)
971 DISABLE_COPY_AND_ASSIGN (gdb_readline_wrapper_cleanup);
975 void (*m_handler_orig) (gdb::unique_xmalloc_ptr<char> &&);
976 int m_already_prompted_orig;
978 /* Whether the target was async. */
979 int m_target_is_async_orig;
981 /* Processing events may change the current UI. */
982 scoped_restore_tmpl<struct ui *> m_save_ui;
986 gdb_readline_wrapper (const char *prompt)
988 struct ui *ui = current_ui;
990 gdb_readline_wrapper_cleanup cleanup;
992 /* Display our prompt and prevent double prompt display. Don't pass
993 down a NULL prompt, since that has special meaning for
994 display_gdb_prompt -- it indicates a request to print the primary
995 prompt, while we want a secondary prompt here. */
996 display_gdb_prompt (prompt != NULL ? prompt : "");
997 if (ui->command_editing)
998 rl_already_prompted = 1;
1000 if (after_char_processing_hook)
1001 (*after_char_processing_hook) ();
1002 gdb_assert (after_char_processing_hook == NULL);
1004 while (gdb_do_one_event () >= 0)
1005 if (gdb_readline_wrapper_done)
1008 return gdb_readline_wrapper_result;
1012 /* The current saved history number from operate-and-get-next.
1013 This is -1 if not valid. */
1014 static int operate_saved_history = -1;
1016 /* This is put on the appropriate hook and helps operate-and-get-next
1019 gdb_rl_operate_and_get_next_completion (void)
1021 int delta = where_history () - operate_saved_history;
1023 /* The `key' argument to rl_get_previous_history is ignored. */
1024 rl_get_previous_history (delta, 0);
1025 operate_saved_history = -1;
1027 /* readline doesn't automatically update the display for us. */
1030 after_char_processing_hook = NULL;
1031 rl_pre_input_hook = NULL;
1034 /* This is a gdb-local readline command handler. It accepts the
1035 current command line (like RET does) and, if this command was taken
1036 from the history, arranges for the next command in the history to
1037 appear on the command line when the prompt returns.
1038 We ignore the arguments. */
1040 gdb_rl_operate_and_get_next (int count, int key)
1044 /* Use the async hook. */
1045 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
1047 /* Find the current line, and find the next line to use. */
1048 where = where_history();
1050 if ((history_is_stifled () && (history_length >= history_max_entries))
1051 || (where >= history_length - 1))
1052 operate_saved_history = where;
1054 operate_saved_history = where + 1;
1056 return rl_newline (1, key);
1059 /* Number of user commands executed during this session. */
1061 static int command_count = 0;
1063 /* Add the user command COMMAND to the input history list. */
1066 gdb_add_history (const char *command)
1070 if (history_remove_duplicates != 0)
1073 int lookbehind_threshold;
1075 /* The lookbehind threshold for finding a duplicate history entry is
1076 bounded by command_count because we can't meaningfully delete
1077 history entries that are already stored in the history file since
1078 the history file is appended to. */
1079 if (history_remove_duplicates == -1
1080 || history_remove_duplicates > command_count)
1081 lookbehind_threshold = command_count;
1083 lookbehind_threshold = history_remove_duplicates;
1086 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
1088 HIST_ENTRY *temp = previous_history ();
1093 if (strcmp (temp->line, command) == 0)
1095 HIST_ENTRY *prev = remove_history (where_history ());
1097 free_history_entry (prev);
1104 add_history (command);
1107 /* Safely append new history entries to the history file in a corruption-free
1108 way using an intermediate local history file. */
1111 gdb_safe_append_history (void)
1113 int ret, saved_errno;
1115 std::string local_history_filename
1116 = string_printf ("%s-gdb%ld~", history_filename, (long) getpid ());
1118 ret = rename (history_filename, local_history_filename.c_str ());
1119 saved_errno = errno;
1120 if (ret < 0 && saved_errno != ENOENT)
1122 warning (_("Could not rename %s to %s: %s"),
1123 history_filename, local_history_filename.c_str (),
1124 safe_strerror (saved_errno));
1130 /* If the rename failed with ENOENT then either the global history
1131 file never existed in the first place or another GDB process is
1132 currently appending to it (and has thus temporarily renamed it).
1133 Since we can't distinguish between these two cases, we have to
1134 conservatively assume the first case and therefore must write out
1135 (not append) our known history to our local history file and try
1136 to move it back anyway. Otherwise a global history file would
1137 never get created! */
1138 gdb_assert (saved_errno == ENOENT);
1139 write_history (local_history_filename.c_str ());
1143 append_history (command_count, local_history_filename.c_str ());
1144 if (history_is_stifled ())
1145 history_truncate_file (local_history_filename.c_str (),
1146 history_max_entries);
1149 ret = rename (local_history_filename.c_str (), history_filename);
1150 saved_errno = errno;
1151 if (ret < 0 && saved_errno != EEXIST)
1152 warning (_("Could not rename %s to %s: %s"),
1153 local_history_filename.c_str (), history_filename,
1154 safe_strerror (saved_errno));
1158 /* Read one line from the command input stream `instream' into a local
1159 static buffer. The buffer is made bigger as necessary. Returns
1160 the address of the start of the line.
1162 NULL is returned for end of file.
1164 This routine either uses fancy command line editing or simple input
1165 as the user has requested. */
1168 command_line_input (const char *prompt_arg, const char *annotation_suffix)
1170 static struct buffer cmd_line_buffer;
1171 static int cmd_line_buffer_initialized;
1172 struct ui *ui = current_ui;
1173 const char *prompt = prompt_arg;
1175 int from_tty = ui->instream == ui->stdin_stream;
1177 /* The annotation suffix must be non-NULL. */
1178 if (annotation_suffix == NULL)
1179 annotation_suffix = "";
1181 if (from_tty && annotation_level > 1)
1186 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1187 + strlen (annotation_suffix) + 40);
1189 local_prompt[0] = '\0';
1191 strcpy (local_prompt, prompt);
1192 strcat (local_prompt, "\n\032\032");
1193 strcat (local_prompt, annotation_suffix);
1194 strcat (local_prompt, "\n");
1196 prompt = local_prompt;
1199 if (!cmd_line_buffer_initialized)
1201 buffer_init (&cmd_line_buffer);
1202 cmd_line_buffer_initialized = 1;
1205 /* Starting a new command line. */
1206 cmd_line_buffer.used_size = 0;
1210 signal (SIGTSTP, handle_sigtstp);
1215 gdb::unique_xmalloc_ptr<char> rl;
1217 /* Make sure that all output has been output. Some machines may
1218 let you get away with leaving out some of the gdb_flush, but
1221 gdb_flush (gdb_stdout);
1222 gdb_flush (gdb_stderr);
1224 if (!source_file_name.empty ())
1225 ++source_line_number;
1227 if (from_tty && annotation_level > 1)
1229 puts_unfiltered ("\n\032\032pre-");
1230 puts_unfiltered (annotation_suffix);
1231 puts_unfiltered ("\n");
1234 /* Don't use fancy stuff if not talking to stdin. */
1235 if (deprecated_readline_hook
1237 && input_interactive_p (current_ui))
1239 rl.reset ((*deprecated_readline_hook) (prompt));
1241 else if (command_editing_p
1243 && input_interactive_p (current_ui))
1245 rl.reset (gdb_readline_wrapper (prompt));
1249 rl.reset (gdb_readline_no_editing (prompt));
1252 cmd = handle_line_of_input (&cmd_line_buffer, rl.get (),
1253 0, annotation_suffix);
1254 if (cmd == (char *) EOF)
1262 /* Got partial input. I.e., got a line that ends with a
1263 continuation character (backslash). Suppress printing the
1270 signal (SIGTSTP, SIG_DFL);
1278 print_gdb_version (struct ui_file *stream, bool interactive)
1280 /* From GNU coding standards, first line is meant to be easy for a
1281 program to parse, and is just canonical program name and version
1282 number, which starts after last space. */
1284 ui_file_style style;
1287 ui_file_style nstyle = { ui_file_style::MAGENTA, ui_file_style::NONE,
1288 ui_file_style::BOLD };
1291 fprintf_styled (stream, style, "GNU gdb %s%s\n", PKGVERSION, version);
1293 /* Second line is a copyright notice. */
1295 fprintf_filtered (stream,
1296 "Copyright (C) 2019 Free Software Foundation, Inc.\n");
1298 /* Following the copyright is a brief statement that the program is
1299 free software, that users are free to copy and change it on
1300 certain conditions, that it is covered by the GNU GPL, and that
1301 there is no warranty. */
1303 fprintf_filtered (stream, "\
1304 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1305 \nThis is free software: you are free to change and redistribute it.\n\
1306 There is NO WARRANTY, to the extent permitted by law.");
1311 fprintf_filtered (stream, ("\nType \"show copying\" and "
1312 "\"show warranty\" for details.\n"));
1314 /* After the required info we print the configuration information. */
1316 fprintf_filtered (stream, "This GDB was configured as \"");
1317 if (strcmp (host_name, target_name) != 0)
1319 fprintf_filtered (stream, "--host=%s --target=%s",
1320 host_name, target_name);
1324 fprintf_filtered (stream, "%s", host_name);
1326 fprintf_filtered (stream, "\".\n");
1328 fprintf_filtered (stream, _("Type \"show configuration\" "
1329 "for configuration details.\n"));
1331 if (REPORT_BUGS_TO[0])
1333 fprintf_filtered (stream,
1334 _("For bug reporting instructions, please see:\n"));
1335 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1337 fprintf_filtered (stream,
1338 _("Find the GDB manual and other documentation \
1339 resources online at:\n <http://www.gnu.org/software/gdb/documentation/>."));
1340 fprintf_filtered (stream, "\n\n");
1341 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1342 fprintf_filtered (stream,
1343 _("Type \"apropos word\" to search for commands \
1344 related to \"word\"."));
1347 /* Print the details of GDB build-time configuration. */
1349 print_gdb_configuration (struct ui_file *stream)
1351 fprintf_filtered (stream, _("\
1352 This GDB was configured as follows:\n\
1353 configure --host=%s --target=%s\n\
1354 "), host_name, target_name);
1355 fprintf_filtered (stream, _("\
1356 --with-auto-load-dir=%s\n\
1357 --with-auto-load-safe-path=%s\n\
1358 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1360 fprintf_filtered (stream, _("\
1364 fprintf_filtered (stream, _("\
1369 fprintf_filtered (stream, _("\
1370 --with-gdb-datadir=%s%s\n\
1371 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1373 fprintf_filtered (stream, _("\
1374 --with-iconv-bin=%s%s\n\
1375 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1377 if (JIT_READER_DIR[0])
1378 fprintf_filtered (stream, _("\
1379 --with-jit-reader-dir=%s%s\n\
1380 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1381 #if HAVE_LIBUNWIND_IA64_H
1382 fprintf_filtered (stream, _("\
1383 --with-libunwind-ia64\n\
1386 fprintf_filtered (stream, _("\
1387 --without-libunwind-ia64\n\
1391 fprintf_filtered (stream, _("\
1395 fprintf_filtered (stream, _("\
1399 #if HAVE_LIBBABELTRACE
1400 fprintf_filtered (stream, _("\
1401 --with-babeltrace\n\
1404 fprintf_filtered (stream, _("\
1405 --without-babeltrace\n\
1409 fprintf_filtered (stream, _("\
1413 fprintf_filtered (stream, _("\
1414 --without-intel-pt\n\
1418 fprintf_filtered (stream, _("\
1419 --enable-libmcheck\n\
1422 fprintf_filtered (stream, _("\
1423 --disable-libmcheck\n\
1427 fprintf_filtered (stream, _("\
1431 fprintf_filtered (stream, _("\
1435 #ifdef WITH_PYTHON_PATH
1436 fprintf_filtered (stream, _("\
1437 --with-python=%s%s\n\
1438 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1440 fprintf_filtered (stream, _("\
1445 fprintf_filtered (stream, _("\
1449 fprintf_filtered (stream, _("\
1454 fprintf_filtered (stream, _("\
1455 --with-relocated-sources=%s\n\
1459 fprintf_filtered (stream, _("\
1460 --with-separate-debug-dir=%s%s\n\
1461 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1462 if (TARGET_SYSTEM_ROOT[0])
1463 fprintf_filtered (stream, _("\
1464 --with-sysroot=%s%s\n\
1465 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1466 if (SYSTEM_GDBINIT[0])
1467 fprintf_filtered (stream, _("\
1468 --with-system-gdbinit=%s%s\n\
1469 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1470 /* We assume "relocatable" will be printed at least once, thus we always
1471 print this text. It's a reasonably safe assumption for now. */
1472 fprintf_filtered (stream, _("\n\
1473 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1474 tree, and GDB will still find it.)\n\
1479 /* The current top level prompt, settable with "set prompt", and/or
1480 with the python `gdb.prompt_hook' hook. */
1481 static char *top_prompt;
1483 /* Access method for the GDB prompt string. */
1491 /* Set method for the GDB prompt string. */
1494 set_prompt (const char *s)
1496 char *p = xstrdup (s);
1508 /* Callback for iterate_over_inferiors. Kills or detaches the given
1509 inferior, depending on how we originally gained control of it. */
1512 kill_or_detach (struct inferior *inf, void *args)
1514 struct qt_args *qt = (struct qt_args *) args;
1519 thread_info *thread = any_thread_of_inferior (inf);
1522 switch_to_thread (thread);
1524 /* Leave core files alone. */
1525 if (target_has_execution)
1527 if (inf->attach_flag)
1528 target_detach (inf, qt->from_tty);
1537 /* Callback for iterate_over_inferiors. Prints info about what GDB
1538 will do to each inferior on a "quit". ARG points to a struct
1539 ui_out where output is to be collected. */
1542 print_inferior_quit_action (struct inferior *inf, void *arg)
1544 struct ui_file *stb = (struct ui_file *) arg;
1549 if (inf->attach_flag)
1550 fprintf_filtered (stb,
1551 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1552 target_pid_to_str (ptid_t (inf->pid)).c_str ());
1554 fprintf_filtered (stb,
1555 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1556 target_pid_to_str (ptid_t (inf->pid)).c_str ());
1561 /* If necessary, make the user confirm that we should quit. Return
1562 non-zero if we should quit, zero if we shouldn't. */
1567 /* Don't even ask if we're only debugging a core file inferior. */
1568 if (!have_live_inferiors ())
1571 /* Build the query string as a single string. */
1574 stb.puts (_("A debugging session is active.\n\n"));
1575 iterate_over_inferiors (print_inferior_quit_action, &stb);
1576 stb.puts (_("\nQuit anyway? "));
1578 return query ("%s", stb.c_str ());
1581 /* Prepare to exit GDB cleanly by undoing any changes made to the
1582 terminal so that we leave the terminal in the state we acquired it. */
1585 undo_terminal_modifications_before_exit (void)
1587 struct ui *saved_top_level = current_ui;
1589 target_terminal::ours ();
1591 current_ui = main_ui;
1596 gdb_disable_readline ();
1598 current_ui = saved_top_level;
1602 /* Quit without asking for confirmation. */
1605 quit_force (int *exit_arg, int from_tty)
1610 undo_terminal_modifications_before_exit ();
1612 /* An optional expression may be used to cause gdb to terminate with the
1613 value of that expression. */
1615 exit_code = *exit_arg;
1616 else if (return_child_result)
1617 exit_code = return_child_result_value;
1619 qt.from_tty = from_tty;
1621 /* We want to handle any quit errors and exit regardless. */
1623 /* Get out of tfind mode, and kill or detach all inferiors. */
1626 disconnect_tracing ();
1627 iterate_over_inferiors (kill_or_detach, &qt);
1629 catch (const gdb_exception_RETURN_MASK_ALL &ex)
1631 exception_print (gdb_stderr, ex);
1634 /* Give all pushed targets a chance to do minimal cleanup, and pop
1640 catch (const gdb_exception_RETURN_MASK_ALL &ex)
1642 exception_print (gdb_stderr, ex);
1645 /* Save the history information if it is appropriate to do so. */
1648 if (write_history_p && history_filename)
1653 /* History is currently shared between all UIs. If there's
1654 any UI with a terminal, save history. */
1657 if (input_interactive_p (ui))
1665 gdb_safe_append_history ();
1668 catch (const gdb_exception_RETURN_MASK_ALL &ex)
1670 exception_print (gdb_stderr, ex);
1673 /* Destroy any values currently allocated now instead of leaving it
1674 to global destructors, because that may be too late. For
1675 example, the destructors of xmethod values call into the Python
1676 runtime, which is finalized via a final cleanup. */
1679 /* Do any final cleanups before exiting. */
1682 do_final_cleanups ();
1684 catch (const gdb_exception_RETURN_MASK_ALL &ex)
1686 exception_print (gdb_stderr, ex);
1692 /* The value of the "interactive-mode" setting. */
1693 static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO;
1695 /* Implement the "show interactive-mode" option. */
1698 show_interactive_mode (struct ui_file *file, int from_tty,
1699 struct cmd_list_element *c,
1702 if (interactive_mode == AUTO_BOOLEAN_AUTO)
1703 fprintf_filtered (file, "Debugger's interactive mode "
1704 "is %s (currently %s).\n",
1705 value, input_interactive_p (current_ui) ? "on" : "off");
1707 fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value);
1710 /* Returns whether GDB is running on an interactive terminal. */
1713 input_interactive_p (struct ui *ui)
1718 if (interactive_mode != AUTO_BOOLEAN_AUTO)
1719 return interactive_mode == AUTO_BOOLEAN_TRUE;
1721 return ui->input_interactive_p;
1725 dont_repeat_command (const char *ignored, int from_tty)
1727 /* Can't call dont_repeat here because we're not necessarily reading
1729 *saved_command_line = 0;
1732 /* Functions to manipulate command line editing control variables. */
1734 /* Number of commands to print in each call to show_commands. */
1735 #define Hist_print 10
1737 show_commands (const char *args, int from_tty)
1739 /* Index for history commands. Relative to history_base. */
1742 /* Number of the history entry which we are planning to display next.
1743 Relative to history_base. */
1746 /* Print out some of the commands from the command history. */
1750 if (args[0] == '+' && args[1] == '\0')
1751 /* "info editing +" should print from the stored position. */
1754 /* "info editing <exp>" should print around command number <exp>. */
1755 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1757 /* "show commands" means print the last Hist_print commands. */
1760 num = history_length - Hist_print;
1766 /* If there are at least Hist_print commands, we want to display the last
1767 Hist_print rather than, say, the last 6. */
1768 if (history_length - num < Hist_print)
1770 num = history_length - Hist_print;
1776 offset < num + Hist_print && offset < history_length;
1779 printf_filtered ("%5d %s\n", history_base + offset,
1780 (history_get (history_base + offset))->line);
1783 /* The next command we want to display is the next one that we haven't
1787 /* If the user repeats this command with return, it should do what
1788 "show commands +" does. This is unnecessary if arg is null,
1789 because "show commands +" is not useful after "show commands". */
1790 if (from_tty && args)
1791 set_repeat_arguments ("+");
1794 /* Update the size of our command history file to HISTORY_SIZE.
1796 A HISTORY_SIZE of -1 stands for unlimited. */
1799 set_readline_history_size (int history_size)
1801 gdb_assert (history_size >= -1);
1803 if (history_size == -1)
1804 unstifle_history ();
1806 stifle_history (history_size);
1809 /* Called by do_setshow_command. */
1811 set_history_size_command (const char *args,
1812 int from_tty, struct cmd_list_element *c)
1814 set_readline_history_size (history_size_setshow_var);
1818 set_history (const char *args, int from_tty)
1820 printf_unfiltered (_("\"set history\" must be followed "
1821 "by the name of a history subcommand.\n"));
1822 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1826 show_history (const char *args, int from_tty)
1828 cmd_show_list (showhistlist, from_tty, "");
1831 int info_verbose = 0; /* Default verbose msgs off. */
1833 /* Called by do_set_command. An elaborate joke. */
1835 set_verbose (const char *args, int from_tty, struct cmd_list_element *c)
1837 const char *cmdname = "verbose";
1838 struct cmd_list_element *showcmd;
1840 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1841 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1843 if (c->doc && c->doc_allocated)
1844 xfree ((char *) c->doc);
1845 if (showcmd->doc && showcmd->doc_allocated)
1846 xfree ((char *) showcmd->doc);
1849 c->doc = _("Set verbose printing of informational messages.");
1850 showcmd->doc = _("Show verbose printing of informational messages.");
1854 c->doc = _("Set verbosity.");
1855 showcmd->doc = _("Show verbosity.");
1857 c->doc_allocated = 0;
1858 showcmd->doc_allocated = 0;
1861 /* Init the history buffer. Note that we are called after the init file(s)
1862 have been read so that the user can change the history file via his
1863 .gdbinit file (for instance). The GDBHISTFILE environment variable
1864 overrides all of this. */
1871 tmpenv = getenv ("GDBHISTSIZE");
1878 tmpenv = skip_spaces (tmpenv);
1880 var = strtol (tmpenv, &endptr, 10);
1881 saved_errno = errno;
1882 endptr = skip_spaces (endptr);
1884 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1885 empty string, a negative number or a huge positive number (larger than
1886 INT_MAX) then set the history size to unlimited. Otherwise set our
1887 history size to the number we have read. This behavior is consistent
1888 with how bash handles HISTSIZE. */
1889 if (*endptr != '\0')
1891 else if (*tmpenv == '\0'
1894 /* On targets where INT_MAX == LONG_MAX, we have to look at
1895 errno after calling strtol to distinguish between a value that
1896 is exactly INT_MAX and an overflowing value that was clamped
1898 || (var == INT_MAX && saved_errno == ERANGE))
1899 history_size_setshow_var = -1;
1901 history_size_setshow_var = var;
1904 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1906 if (history_size_setshow_var == -2)
1907 history_size_setshow_var = 256;
1909 set_readline_history_size (history_size_setshow_var);
1911 tmpenv = getenv ("GDBHISTFILE");
1913 history_filename = xstrdup (tmpenv);
1914 else if (!history_filename)
1916 /* We include the current directory so that if the user changes
1917 directories the file written will be the same as the one
1920 /* No leading dots in file names are allowed on MSDOS. */
1921 history_filename = concat (current_directory, "/_gdb_history",
1924 history_filename = concat (current_directory, "/.gdb_history",
1928 read_history (history_filename);
1932 show_prompt (struct ui_file *file, int from_tty,
1933 struct cmd_list_element *c, const char *value)
1935 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
1938 /* "set editing" command. */
1941 set_editing (const char *args, int from_tty, struct cmd_list_element *c)
1943 change_line_handler (set_editing_cmd_var);
1944 /* Update the control variable so that MI's =cmd-param-changed event
1945 shows the correct value. */
1946 set_editing_cmd_var = current_ui->command_editing;
1950 show_editing (struct ui_file *file, int from_tty,
1951 struct cmd_list_element *c, const char *value)
1953 fprintf_filtered (file, _("Editing of command lines as "
1954 "they are typed is %s.\n"),
1955 current_ui->command_editing ? _("on") : _("off"));
1959 show_annotation_level (struct ui_file *file, int from_tty,
1960 struct cmd_list_element *c, const char *value)
1962 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
1966 show_exec_done_display_p (struct ui_file *file, int from_tty,
1967 struct cmd_list_element *c, const char *value)
1969 fprintf_filtered (file, _("Notification of completion for "
1970 "asynchronous execution commands is %s.\n"),
1974 /* New values of the "data-directory" parameter are staged here. */
1975 static char *staged_gdb_datadir;
1977 /* "set" command for the gdb_datadir configuration variable. */
1980 set_gdb_datadir (const char *args, int from_tty, struct cmd_list_element *c)
1982 set_gdb_data_directory (staged_gdb_datadir);
1983 gdb::observers::gdb_datadir_changed.notify ();
1986 /* "show" command for the gdb_datadir configuration variable. */
1989 show_gdb_datadir (struct ui_file *file, int from_tty,
1990 struct cmd_list_element *c, const char *value)
1992 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
1997 set_history_filename (const char *args,
1998 int from_tty, struct cmd_list_element *c)
2000 /* We include the current directory so that if the user changes
2001 directories the file written will be the same as the one
2003 if (!IS_ABSOLUTE_PATH (history_filename))
2004 history_filename = reconcat (history_filename, current_directory, "/",
2005 history_filename, (char *) NULL);
2009 init_gdb_version_vars (void)
2011 struct internalvar *major_version_var = create_internalvar ("_gdb_major");
2012 struct internalvar *minor_version_var = create_internalvar ("_gdb_minor");
2013 int vmajor = 0, vminor = 0, vrevision = 0;
2014 sscanf (version, "%d.%d.%d", &vmajor, &vminor, &vrevision);
2015 set_internalvar_integer (major_version_var, vmajor);
2016 set_internalvar_integer (minor_version_var, vminor + (vrevision > 0));
2022 struct cmd_list_element *c;
2024 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
2025 the DEFAULT_PROMPT is. */
2026 set_prompt (DEFAULT_PROMPT);
2028 /* Set the important stuff up for command editing. */
2029 command_editing_p = 1;
2030 history_expansion_p = 0;
2031 write_history_p = 0;
2033 /* Setup important stuff for command line editing. */
2034 rl_completion_word_break_hook = gdb_completion_word_break_characters;
2035 rl_attempted_completion_function = gdb_rl_attempted_completion_function;
2036 set_rl_completer_word_break_characters (default_word_break_characters ());
2037 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
2038 rl_completion_display_matches_hook = cli_display_match_list;
2039 rl_readline_name = "gdb";
2040 rl_terminal_name = getenv ("TERM");
2042 /* The name for this defun comes from Bash, where it originated.
2043 15 is Control-o, the same binding this function has in Bash. */
2044 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
2046 add_setshow_string_cmd ("prompt", class_support,
2048 _("Set gdb's prompt"),
2049 _("Show gdb's prompt"),
2052 &setlist, &showlist);
2054 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
2055 Don't repeat this command.\nPrimarily \
2056 used inside of user-defined commands that should not be repeated when\n\
2059 add_setshow_boolean_cmd ("editing", class_support,
2060 &set_editing_cmd_var, _("\
2061 Set editing of command lines as they are typed."), _("\
2062 Show editing of command lines as they are typed."), _("\
2063 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2064 Without an argument, command line editing is enabled. To edit, use\n\
2065 EMACS-like or VI-like commands like control-P or ESC."),
2068 &setlist, &showlist);
2070 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
2071 Set saving of the history record on exit."), _("\
2072 Show saving of the history record on exit."), _("\
2073 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2074 Without an argument, saving is enabled."),
2076 show_write_history_p,
2077 &sethistlist, &showhistlist);
2079 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
2080 &history_size_setshow_var, _("\
2081 Set the size of the command history,"), _("\
2082 Show the size of the command history,"), _("\
2083 ie. the number of previous commands to keep a record of.\n\
2084 If set to \"unlimited\", the number of commands kept in the history\n\
2085 list is unlimited. This defaults to the value of the environment\n\
2086 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2087 set_history_size_command,
2089 &sethistlist, &showhistlist);
2091 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
2092 &history_remove_duplicates, _("\
2093 Set how far back in history to look for and remove duplicate entries."), _("\
2094 Show how far back in history to look for and remove duplicate entries."), _("\
2095 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2096 and remove the first history entry that is a duplicate of the most recent\n\
2097 entry, each time a new history entry is added.\n\
2098 If set to \"unlimited\", this lookbehind is unbounded.\n\
2099 Only history entries added during this session are considered for removal.\n\
2100 If set to 0, removal of duplicate history entries is disabled.\n\
2101 By default this option is set to 0."),
2103 show_history_remove_duplicates,
2104 &sethistlist, &showhistlist);
2106 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
2107 Set the filename in which to record the command history"), _("\
2108 Show the filename in which to record the command history"), _("\
2109 (the list of previous commands of which a record is kept)."),
2110 set_history_filename,
2111 show_history_filename,
2112 &sethistlist, &showhistlist);
2114 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
2115 Set whether to confirm potentially dangerous operations."), _("\
2116 Show whether to confirm potentially dangerous operations."), NULL,
2119 &setlist, &showlist);
2121 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
2122 Set annotation_level."), _("\
2123 Show annotation_level."), _("\
2124 0 == normal; 1 == fullname (for use when running under emacs)\n\
2125 2 == output annotated suitably for use by programs that control GDB."),
2127 show_annotation_level,
2128 &setlist, &showlist);
2130 add_setshow_boolean_cmd ("exec-done-display", class_support,
2131 &exec_done_display_p, _("\
2132 Set notification of completion for asynchronous execution commands."), _("\
2133 Show notification of completion for asynchronous execution commands."), _("\
2134 Use \"on\" to enable the notification, and \"off\" to disable it."),
2136 show_exec_done_display_p,
2137 &setlist, &showlist);
2139 add_setshow_filename_cmd ("data-directory", class_maintenance,
2140 &staged_gdb_datadir, _("Set GDB's data directory."),
2141 _("Show GDB's data directory."),
2143 When set, GDB uses the specified path to search for data files."),
2144 set_gdb_datadir, show_gdb_datadir,
2148 add_setshow_auto_boolean_cmd ("interactive-mode", class_support,
2149 &interactive_mode, _("\
2150 Set whether GDB's standard input is a terminal."), _("\
2151 Show whether GDB's standard input is a terminal."), _("\
2152 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2153 means that GDB should wait for the user to answer queries associated to\n\
2154 commands entered at the command prompt. If off, GDB assumes that standard\n\
2155 input is not a terminal, and uses the default answer to all queries.\n\
2156 If auto (the default), determine which mode to use based on the standard\n\
2159 show_interactive_mode,
2160 &setlist, &showlist);
2162 c = add_cmd ("new-ui", class_support, new_ui_command, _("\
2163 Create a new UI. It takes two arguments:\n\
2164 The first argument is the name of the interpreter to run.\n\
2165 The second argument is the terminal the UI runs on.\n"), &cmdlist);
2166 set_cmd_completer (c, interpreter_completer);
2170 gdb_init (char *argv0)
2172 if (pre_init_ui_hook)
2173 pre_init_ui_hook ();
2175 /* Run the init function of each source file. */
2178 /* Make sure we return to the original directory upon exit, come
2179 what may, since the OS doesn't do that for us. */
2180 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2183 init_cmd_lists (); /* This needs to be done first. */
2184 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2185 initialize_utils (); /* Make errors and warnings possible. */
2189 /* Here is where we call all the _initialize_foo routines. */
2190 initialize_all_files ();
2192 /* This creates the current_program_space. Do this after all the
2193 _initialize_foo routines have had a chance to install their
2194 per-sspace data keys. Also do this before
2195 initialize_current_architecture is called, because it accesses
2196 exec_bfd of the current program space. */
2197 initialize_progspace ();
2198 initialize_inferiors ();
2199 initialize_current_architecture ();
2201 init_main (); /* But that omits this file! Do it now. */
2203 initialize_stdin_serial ();
2205 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2207 set_initial_gdb_ttystate ();
2209 async_init_signals ();
2211 /* We need a default language for parsing expressions, so simple
2212 things like "set width 0" won't fail if no language is explicitly
2213 set in a config file or implicitly set by reading an executable
2215 set_language (language_c);
2216 expected_language = current_language; /* Don't warn about the change. */
2218 /* Python initialization, for example, can require various commands to be
2219 installed. For example "info pretty-printer" needs the "info"
2220 prefix to be installed. Keep things simple and just do final
2221 script initialization here. */
2222 finish_ext_lang_initialization ();
2224 /* Create $_gdb_major and $_gdb_minor convenience variables. */
2225 init_gdb_version_vars ();