1 /* General functions for the WDB TUI.
3 Copyright (C) 1998-2019 Free Software Foundation, Inc.
5 Contributed by Hewlett-Packard Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "tui/tui-hooks.h"
26 #include "tui/tui-data.h"
27 #include "tui/tui-layout.h"
28 #include "tui/tui-io.h"
29 #include "tui/tui-regs.h"
30 #include "tui/tui-stack.h"
31 #include "tui/tui-win.h"
32 #include "tui/tui-winsource.h"
35 #include "breakpoint.h"
50 #include "gdb_curses.h"
53 /* This redefines CTRL if it is not already defined, so it must come
54 after terminal state releated include files like <term.h> and
56 #include "readline/readline.h"
58 /* Tells whether the TUI is active or not. */
60 static int tui_finish_init
= 1;
62 enum tui_key_mode tui_current_key_mode
= TUI_COMMAND_MODE
;
64 struct tui_char_command
70 /* Key mapping to gdb commands when the TUI is using the single key
72 static const struct tui_char_command tui_commands
[] = {
82 { 'v', "info locals" },
87 static Keymap tui_keymap
;
88 static Keymap tui_readline_standard_keymap
;
90 /* TUI readline command.
91 Switch the output mode between TUI/standard gdb. */
93 tui_rl_switch_mode (int notused1
, int notused2
)
96 /* Don't let exceptions escape. We're in the middle of a readline
97 callback that isn't prepared for that. */
103 rl_prep_terminal (0);
107 /* If tui_enable throws, we'll re-prep below. */
108 rl_deprep_terminal ();
112 catch (const gdb_exception
&ex
)
114 exception_print (gdb_stderr
, ex
);
117 rl_prep_terminal (0);
120 /* Clear the readline in case switching occurred in middle of
123 rl_kill_text (0, rl_end
);
125 /* Since we left the curses mode, the terminal mode is restored to
126 some previous state. That state may not be suitable for readline
127 to work correctly (it may be restored in line mode). We force an
128 exit of the current readline so that readline is re-entered and
129 it will be able to setup the terminal for its needs. By
130 re-entering in readline, we also redisplay its prompt in the
132 rl_newline (1, '\n');
134 /* Make sure the \n we are returning does not repeat the last
140 /* TUI readline command.
141 Change the TUI layout to show a next layout.
142 This function is bound to CTRL-X 2. It is intended to provide
143 a functionality close to the Emacs split-window command. We
144 always show two windows (src+asm), (src+regs) or (asm+regs). */
146 tui_rl_change_windows (int notused1
, int notused2
)
149 tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
153 enum tui_layout_type new_layout
;
155 new_layout
= tui_current_layout ();
157 /* Select a new layout to have a rolling layout behavior with
158 always two windows (except when undefined). */
162 new_layout
= SRC_DISASSEM_COMMAND
;
165 case DISASSEM_COMMAND
:
166 new_layout
= SRC_DISASSEM_COMMAND
;
169 case SRC_DATA_COMMAND
:
170 new_layout
= SRC_DISASSEM_COMMAND
;
173 case SRC_DISASSEM_COMMAND
:
174 new_layout
= DISASSEM_DATA_COMMAND
;
177 case DISASSEM_DATA_COMMAND
:
178 new_layout
= SRC_DATA_COMMAND
;
182 new_layout
= SRC_COMMAND
;
185 tui_set_layout (new_layout
);
190 /* TUI readline command.
191 Delete the second TUI window to only show one. */
193 tui_rl_delete_other_windows (int notused1
, int notused2
)
196 tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
200 enum tui_layout_type new_layout
;
202 new_layout
= tui_current_layout ();
204 /* Kill one window. */
208 case SRC_DATA_COMMAND
:
209 case SRC_DISASSEM_COMMAND
:
211 new_layout
= SRC_COMMAND
;
214 case DISASSEM_COMMAND
:
215 case DISASSEM_DATA_COMMAND
:
216 new_layout
= DISASSEM_COMMAND
;
219 tui_set_layout (new_layout
);
224 /* TUI readline command.
225 Switch the active window to give the focus to a next window. */
227 tui_rl_other_window (int count
, int key
)
229 struct tui_win_info
*win_info
;
232 tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
234 win_info
= tui_next_win (tui_win_with_focus ());
237 tui_set_win_focus_to (win_info
);
238 keypad (TUI_CMD_WIN
->handle
, (win_info
!= TUI_CMD_WIN
));
243 /* TUI readline command.
244 Execute the gdb command bound to the specified key. */
246 tui_rl_command_key (int count
, int key
)
250 reinitialize_more_filter ();
251 for (i
= 0; tui_commands
[i
].cmd
; i
++)
253 if (tui_commands
[i
].key
== key
)
255 /* Insert the command in the readline buffer.
256 Avoid calling the gdb command here since it creates
257 a possible recursion on readline if prompt_for_continue
258 is called (See PR 9584). The command will also appear
259 in the readline history which turns out to be better. */
260 rl_insert_text (tui_commands
[i
].cmd
);
261 rl_newline (1, '\n');
263 /* Switch to gdb command mode while executing the command.
264 This way the gdb's continue prompty will be displayed. */
265 tui_set_key_mode (TUI_ONE_COMMAND_MODE
);
272 /* TUI readline command.
273 Temporarily leave the TUI SingleKey mode to allow editing
274 a gdb command with the normal readline. Once the command
275 is executed, the TUI SingleKey mode is installed back. */
277 tui_rl_command_mode (int count
, int key
)
279 tui_set_key_mode (TUI_ONE_COMMAND_MODE
);
280 return rl_insert (count
, key
);
283 /* TUI readline command.
284 Switch between TUI SingleKey mode and gdb readline editing. */
286 tui_rl_next_keymap (int notused1
, int notused2
)
289 tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
291 tui_set_key_mode (tui_current_key_mode
== TUI_COMMAND_MODE
292 ? TUI_SINGLE_KEY_MODE
: TUI_COMMAND_MODE
);
296 /* Readline hook to redisplay ourself the gdb prompt.
297 In the SingleKey mode, the prompt is not printed so that
298 the command window is cleaner. It will be displayed if
299 we temporarily leave the SingleKey mode. */
301 tui_rl_startup_hook (void)
303 rl_already_prompted
= 1;
304 if (tui_current_key_mode
!= TUI_COMMAND_MODE
305 && !gdb_in_secondary_prompt_p (current_ui
))
306 tui_set_key_mode (TUI_SINGLE_KEY_MODE
);
307 tui_redisplay_readline ();
311 /* Change the TUI key mode by installing the appropriate readline
314 tui_set_key_mode (enum tui_key_mode mode
)
316 tui_current_key_mode
= mode
;
317 rl_set_keymap (mode
== TUI_SINGLE_KEY_MODE
318 ? tui_keymap
: tui_readline_standard_keymap
);
319 tui_show_locator_content ();
322 /* Initialize readline and configure the keymap for the switching
325 tui_initialize_readline (void)
328 Keymap tui_ctlx_keymap
;
332 rl_add_defun ("tui-switch-mode", tui_rl_switch_mode
, -1);
333 rl_add_defun ("gdb-command", tui_rl_command_key
, -1);
334 rl_add_defun ("next-keymap", tui_rl_next_keymap
, -1);
336 tui_keymap
= rl_make_bare_keymap ();
337 tui_ctlx_keymap
= rl_make_bare_keymap ();
338 tui_readline_standard_keymap
= rl_get_keymap ();
340 for (i
= 0; tui_commands
[i
].cmd
; i
++)
341 rl_bind_key_in_map (tui_commands
[i
].key
, tui_rl_command_key
, tui_keymap
);
343 rl_generic_bind (ISKMAP
, "\\C-x", (char*) tui_ctlx_keymap
, tui_keymap
);
345 /* Bind all other keys to tui_rl_command_mode so that we switch
346 temporarily from SingleKey mode and can enter a gdb command. */
347 for (i
= ' '; i
< 0x7f; i
++)
351 for (j
= 0; tui_commands
[j
].cmd
; j
++)
352 if (tui_commands
[j
].key
== i
)
355 if (tui_commands
[j
].cmd
)
358 rl_bind_key_in_map (i
, tui_rl_command_mode
, tui_keymap
);
361 rl_bind_key_in_map ('a', tui_rl_switch_mode
, emacs_ctlx_keymap
);
362 rl_bind_key_in_map ('a', tui_rl_switch_mode
, tui_ctlx_keymap
);
363 rl_bind_key_in_map ('A', tui_rl_switch_mode
, emacs_ctlx_keymap
);
364 rl_bind_key_in_map ('A', tui_rl_switch_mode
, tui_ctlx_keymap
);
365 rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode
, emacs_ctlx_keymap
);
366 rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode
, tui_ctlx_keymap
);
367 rl_bind_key_in_map ('1', tui_rl_delete_other_windows
, emacs_ctlx_keymap
);
368 rl_bind_key_in_map ('1', tui_rl_delete_other_windows
, tui_ctlx_keymap
);
369 rl_bind_key_in_map ('2', tui_rl_change_windows
, emacs_ctlx_keymap
);
370 rl_bind_key_in_map ('2', tui_rl_change_windows
, tui_ctlx_keymap
);
371 rl_bind_key_in_map ('o', tui_rl_other_window
, emacs_ctlx_keymap
);
372 rl_bind_key_in_map ('o', tui_rl_other_window
, tui_ctlx_keymap
);
373 rl_bind_key_in_map ('q', tui_rl_next_keymap
, tui_keymap
);
374 rl_bind_key_in_map ('s', tui_rl_next_keymap
, emacs_ctlx_keymap
);
375 rl_bind_key_in_map ('s', tui_rl_next_keymap
, tui_ctlx_keymap
);
378 /* Return the TERM variable from the environment, or "<unset>"
382 gdb_getenv_term (void)
386 term
= getenv ("TERM");
392 /* Enter in the tui mode (curses).
393 When in normal mode, it installs the tui hooks in gdb, redirects
394 the gdb output, configures the readline to work in tui mode.
395 When in curses mode, it does nothing. */
402 /* To avoid to initialize curses when gdb starts, there is a defered
403 curses initialization. This initialization is made only once
404 and the first time the curses mode is entered. */
414 /* If the top level interpreter is not the console/tui (e.g.,
415 MI), enabling curses will certainly lose. */
416 interp
= top_level_interpreter ()->name ();
417 if (strcmp (interp
, INTERP_TUI
) != 0)
418 error (_("Cannot enable the TUI when the interpreter is '%s'"), interp
);
420 /* Don't try to setup curses (and print funny control
421 characters) if we're not outputting to a terminal. */
422 if (!ui_file_isatty (gdb_stdout
))
423 error (_("Cannot enable the TUI when output is not a terminal"));
425 s
= newterm (NULL
, stdout
, stdin
);
427 /* The MinGW port of ncurses requires $TERM to be unset in order
428 to activate the Windows console driver. */
430 s
= newterm ((char *) "unknown", stdout
, stdin
);
434 error (_("Cannot enable the TUI: error opening terminal [TERM=%s]"),
440 #ifdef HAVE_USE_DEFAULT_COLORS
441 /* Ncurses extension to help with resetting to the default
443 use_default_colors ();
448 /* Check required terminal capabilities. The MinGW port of
449 ncurses does have them, but doesn't expose them through "cup". */
451 cap
= tigetstr ((char *) "cup");
452 if (cap
== NULL
|| cap
== (char *) -1 || *cap
== '\0')
456 error (_("Cannot enable the TUI: "
457 "terminal doesn't support cursor addressing [TERM=%s]"),
469 tui_set_term_height_to (LINES
);
470 tui_set_term_width_to (COLS
);
473 tui_show_frame_info (0);
474 tui_set_layout (SRC_COMMAND
);
475 tui_set_win_focus_to (TUI_SRC_WIN
);
476 keypad (TUI_CMD_WIN
->handle
, TRUE
);
477 wrefresh (TUI_CMD_WIN
->handle
);
482 /* Save the current gdb setting of the terminal.
483 Curses will restore this state when endwin() is called. */
485 clearok (stdscr
, TRUE
);
488 /* Install the TUI specific hooks. */
489 tui_install_hooks ();
490 rl_startup_hook
= tui_rl_startup_hook
;
492 tui_update_variables ();
498 /* Resize windows before anything might display/refresh a
500 if (tui_win_resized ())
502 tui_set_win_resized_to (FALSE
);
506 if (deprecated_safe_get_selected_frame ())
507 tui_show_frame_info (deprecated_safe_get_selected_frame ());
509 /* Restore TUI keymap. */
510 tui_set_key_mode (tui_current_key_mode
);
512 /* Refresh the screen. */
513 tui_refresh_all_win ();
515 /* Update gdb's knowledge of its terminal. */
516 gdb_save_tty_state ();
517 tui_update_gdb_sizes ();
520 /* Leave the tui mode.
521 Remove the tui hooks and configure the gdb output and readline
522 back to their original state. The curses mode is left so that
523 the terminal setting is restored to the point when we entered. */
530 /* Restore initial readline keymap. */
531 rl_set_keymap (tui_readline_standard_keymap
);
533 /* Remove TUI hooks. */
536 rl_already_prompted
= 0;
538 /* Leave curses and restore previous gdb terminal setting. */
541 /* gdb terminal has changed, update gdb internal copy of it
542 so that terminal management with the inferior works. */
545 /* Update gdb's knowledge of its terminal. */
546 gdb_save_tty_state ();
549 tui_update_gdb_sizes ();
552 /* Command wrapper for enabling tui mode. */
555 tui_enable_command (const char *args
, int from_tty
)
560 /* Command wrapper for leaving tui mode. */
563 tui_disable_command (const char *args
, int from_tty
)
569 strcat_to_buf (char *buf
, int buflen
,
570 const char *item_to_add
)
572 if (item_to_add
!= NULL
&& buf
!= NULL
)
574 if ((strlen (buf
) + strlen (item_to_add
)) <= buflen
)
575 strcat (buf
, item_to_add
);
577 strncat (buf
, item_to_add
, (buflen
- strlen (buf
)));
582 /* Solaris <sys/termios.h> defines CTRL. */
584 #define CTRL(x) (x & ~0140)
588 #define CHK(val, dft) (val<=0 ? dft : val)
595 /* Reset the teletype mode bits to a sensible state.
597 #if defined (TIOCGETC)
599 #endif /* TIOCGETC */
603 if (ldisc
== NTTYDISC
)
605 ioctl (FILEDES
, TIOCGLTC
, <c
);
606 ltc
.t_suspc
= CHK (ltc
.t_suspc
, CTRL ('Z'));
607 ltc
.t_dsuspc
= CHK (ltc
.t_dsuspc
, CTRL ('Y'));
608 ltc
.t_rprntc
= CHK (ltc
.t_rprntc
, CTRL ('R'));
609 ltc
.t_flushc
= CHK (ltc
.t_flushc
, CTRL ('O'));
610 ltc
.t_werasc
= CHK (ltc
.t_werasc
, CTRL ('W'));
611 ltc
.t_lnextc
= CHK (ltc
.t_lnextc
, CTRL ('V'));
612 ioctl (FILEDES
, TIOCSLTC
, <c
);
614 #endif /* UCB_NTTY */
616 ioctl (FILEDES
, TIOCGETC
, &tbuf
);
617 tbuf
.t_intrc
= CHK (tbuf
.t_intrc
, CTRL ('?'));
618 tbuf
.t_quitc
= CHK (tbuf
.t_quitc
, CTRL ('\\'));
619 tbuf
.t_startc
= CHK (tbuf
.t_startc
, CTRL ('Q'));
620 tbuf
.t_stopc
= CHK (tbuf
.t_stopc
, CTRL ('S'));
621 tbuf
.t_eofc
= CHK (tbuf
.t_eofc
, CTRL ('D'));
622 /* brkc is left alone. */
623 ioctl (FILEDES
, TIOCSETC
, &tbuf
);
624 #endif /* TIOCGETC */
625 mode
.sg_flags
&= ~(RAW
629 | VTDELAY
| ALLDELAY
);
630 mode
.sg_flags
|= XTABS
| ECHO
| CRMOD
| ANYP
;
637 tui_show_source (const char *fullname
, int line
)
639 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
641 /* Make sure that the source window is displayed. */
642 tui_add_win_to_layout (SRC_WIN
);
644 tui_update_source_windows_with_line (cursal
.symtab
, line
);
645 tui_update_locator_fullname (fullname
);
649 tui_show_assembly (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
651 tui_add_win_to_layout (DISASSEM_WIN
);
652 tui_update_source_windows_with_addr (gdbarch
, addr
);
656 tui_is_window_visible (enum tui_win_type type
)
661 if (tui_win_list
[type
] == 0)
664 return tui_win_list
[type
]->is_visible
;
668 tui_get_command_dimension (unsigned int *width
,
669 unsigned int *height
)
671 if (!tui_active
|| (TUI_CMD_WIN
== NULL
))
676 *width
= TUI_CMD_WIN
->width
;
677 *height
= TUI_CMD_WIN
->height
;
682 _initialize_tui (void)
684 struct cmd_list_element
**tuicmd
;
686 tuicmd
= tui_get_cmd_list ();
688 add_cmd ("enable", class_tui
, tui_enable_command
,
689 _("Enable TUI display mode."),
691 add_cmd ("disable", class_tui
, tui_disable_command
,
692 _("Disable TUI display mode."),