aboutsummaryrefslogtreecommitdiff
path: root/gdb/tui/tui.c
blob: 7ff2a5373770e46d97b69a38558c94b8e86e75af (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
/* General functions for the WDB TUI.

   Copyright (C) 1998-2017 Free Software Foundation, Inc.

   Contributed by Hewlett-Packard Company.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "gdbcmd.h"
#include "tui/tui.h"
#include "tui/tui-hooks.h"
#include "tui/tui-data.h"
#include "tui/tui-layout.h"
#include "tui/tui-io.h"
#include "tui/tui-regs.h"
#include "tui/tui-stack.h"
#include "tui/tui-win.h"
#include "tui/tui-winsource.h"
#include "tui/tui-windata.h"
#include "target.h"
#include "frame.h"
#include "breakpoint.h"
#include "inferior.h"
#include "symtab.h"
#include "source.h"
#include "terminal.h"
#include "top.h"

#include <ctype.h>
#include <signal.h>
#include <fcntl.h>
#if 0
#include <termio.h>
#endif
#include <setjmp.h>

#include "gdb_curses.h"
#include "interps.h"

/* This redefines CTRL if it is not already defined, so it must come
   after terminal state releated include files like <term.h> and
   "gdb_curses.h".  */
#include "readline/readline.h"

/* Tells whether the TUI is active or not.  */
int tui_active = 0;
static int tui_finish_init = 1;

enum tui_key_mode tui_current_key_mode = TUI_COMMAND_MODE;

struct tui_char_command
{
  unsigned char key;
  const char *cmd;
};

/* Key mapping to gdb commands when the TUI is using the single key
   mode.  */
static const struct tui_char_command tui_commands[] = {
  { 'c', "continue" },
  { 'd', "down" },
  { 'f', "finish" },
  { 'n', "next" },
  { 'r', "run" },
  { 's', "step" },
  { 'u', "up" },
  { 'v', "info locals" },
  { 'w', "where" },
  { 0, 0 },
};

static Keymap tui_keymap;
static Keymap tui_readline_standard_keymap;

/* TUI readline command.
   Switch the output mode between TUI/standard gdb.  */
static int
tui_rl_switch_mode (int notused1, int notused2)
{

  /* Don't let exceptions escape.  We're in the middle of a readline
     callback that isn't prepared for that.  */
  TRY
    {
      if (tui_active)
	{
	  tui_disable ();
	  rl_prep_terminal (0);
	}
      else
	{
	  /* If tui_enable throws, we'll re-prep below.  */
	  rl_deprep_terminal ();
	  tui_enable ();
	}
    }
  CATCH (ex, RETURN_MASK_ALL)
    {
      exception_print (gdb_stderr, ex);

      if (!tui_active)
	rl_prep_terminal (0);
    }
  END_CATCH

  /* Clear the readline in case switching occurred in middle of
     something.  */
  if (rl_end)
    rl_kill_text (0, rl_end);

  /* Since we left the curses mode, the terminal mode is restored to
     some previous state.  That state may not be suitable for readline
     to work correctly (it may be restored in line mode).  We force an
     exit of the current readline so that readline is re-entered and
     it will be able to setup the terminal for its needs.  By
     re-entering in readline, we also redisplay its prompt in the
     non-curses mode.  */
  rl_newline (1, '\n');

  /* Make sure the \n we are returning does not repeat the last
     command.  */
  dont_repeat ();
  return 0;
}

/* TUI readline command.
   Change the TUI layout to show a next layout.
   This function is bound to CTRL-X 2.  It is intended to provide
   a functionality close to the Emacs split-window command.  We
   always show two windows (src+asm), (src+regs) or (asm+regs).  */
static int
tui_rl_change_windows (int notused1, int notused2)
{
  if (!tui_active)
    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  if (tui_active)
    {
      enum tui_layout_type new_layout;

      new_layout = tui_current_layout ();

      /* Select a new layout to have a rolling layout behavior with
	 always two windows (except when undefined).  */
      switch (new_layout)
	{
	case SRC_COMMAND:
	  new_layout = SRC_DISASSEM_COMMAND;
	  break;

	case DISASSEM_COMMAND:
	  new_layout = SRC_DISASSEM_COMMAND;
	  break;

	case SRC_DATA_COMMAND:
	  new_layout = SRC_DISASSEM_COMMAND;
	  break;

	case SRC_DISASSEM_COMMAND:
	  new_layout = DISASSEM_DATA_COMMAND;
	  break;
	  
	case DISASSEM_DATA_COMMAND:
	  new_layout = SRC_DATA_COMMAND;
	  break;

	default:
	  new_layout = SRC_COMMAND;
	  break;
	}
      tui_set_layout (new_layout);
    }
  return 0;
}

/* TUI readline command.
   Delete the second TUI window to only show one.  */
static int
tui_rl_delete_other_windows (int notused1, int notused2)
{
  if (!tui_active)
    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  if (tui_active)
    {
      enum tui_layout_type new_layout;

      new_layout = tui_current_layout ();

      /* Kill one window.  */
      switch (new_layout)
	{
	case SRC_COMMAND:
	case SRC_DATA_COMMAND:
	case SRC_DISASSEM_COMMAND:
	default:
	  new_layout = SRC_COMMAND;
	  break;

	case DISASSEM_COMMAND:
	case DISASSEM_DATA_COMMAND:
	  new_layout = DISASSEM_COMMAND;
	  break;
	}
      tui_set_layout (new_layout);
    }
  return 0;
}

/* TUI readline command.
   Switch the active window to give the focus to a next window.  */
static int
tui_rl_other_window (int count, int key)
{
  struct tui_win_info *win_info;

  if (!tui_active)
    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  win_info = tui_next_win (tui_win_with_focus ());
  if (win_info)
    {
      tui_set_win_focus_to (win_info);
      if (TUI_DATA_WIN && TUI_DATA_WIN->generic.is_visible)
        tui_refresh_data_win ();
      keypad (TUI_CMD_WIN->generic.handle, (win_info != TUI_CMD_WIN));
    }
  return 0;
}

/* TUI readline command.
   Execute the gdb command bound to the specified key.  */
static int
tui_rl_command_key (int count, int key)
{
  int i;

  reinitialize_more_filter ();
  for (i = 0; tui_commands[i].cmd; i++)
    {
      if (tui_commands[i].key == key)
        {
          /* Insert the command in the readline buffer.
             Avoid calling the gdb command here since it creates
             a possible recursion on readline if prompt_for_continue
             is called (See PR 9584).  The command will also appear
             in the readline history which turns out to be better.  */
          rl_insert_text (tui_commands[i].cmd);
          rl_newline (1, '\n');

          /* Switch to gdb command mode while executing the command.
             This way the gdb's continue prompty will be displayed.  */
          tui_set_key_mode (TUI_ONE_COMMAND_MODE);
          return 0;
        }
    }
  return 0;
}

/* TUI readline command.
   Temporarily leave the TUI SingleKey mode to allow editing
   a gdb command with the normal readline.  Once the command
   is executed, the TUI SingleKey mode is installed back.  */
static int
tui_rl_command_mode (int count, int key)
{
  tui_set_key_mode (TUI_ONE_COMMAND_MODE);
  return rl_insert (count, key);
}

/* TUI readline command.
   Switch between TUI SingleKey mode and gdb readline editing.  */
static int
tui_rl_next_keymap (int notused1, int notused2)
{
  if (!tui_active)
    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  tui_set_key_mode (tui_current_key_mode == TUI_COMMAND_MODE
                    ? TUI_SINGLE_KEY_MODE : TUI_COMMAND_MODE);
  return 0;
}

/* Readline hook to redisplay ourself the gdb prompt.
   In the SingleKey mode, the prompt is not printed so that
   the command window is cleaner.  It will be displayed if
   we temporarily leave the SingleKey mode.  */
static int
tui_rl_startup_hook (void)
{
  rl_already_prompted = 1;
  if (tui_current_key_mode != TUI_COMMAND_MODE
      && !gdb_in_secondary_prompt_p (current_ui))
    tui_set_key_mode (TUI_SINGLE_KEY_MODE);
  tui_redisplay_readline ();
  return 0;
}

/* Change the TUI key mode by installing the appropriate readline
   keymap.  */
void
tui_set_key_mode (enum tui_key_mode mode)
{
  tui_current_key_mode = mode;
  rl_set_keymap (mode == TUI_SINGLE_KEY_MODE
                 ? tui_keymap : tui_readline_standard_keymap);
  tui_show_locator_content ();
}

/* Initialize readline and configure the keymap for the switching
   key shortcut.  */
void
tui_initialize_readline (void)
{
  int i;
  Keymap tui_ctlx_keymap;

  rl_initialize ();

  rl_add_defun ("tui-switch-mode", tui_rl_switch_mode, -1);
  rl_add_defun ("gdb-command", tui_rl_command_key, -1);
  rl_add_defun ("next-keymap", tui_rl_next_keymap, -1);

  tui_keymap = rl_make_bare_keymap ();
  tui_ctlx_keymap = rl_make_bare_keymap ();
  tui_readline_standard_keymap = rl_get_keymap ();

  for (i = 0; tui_commands[i].cmd; i++)
    rl_bind_key_in_map (tui_commands[i].key, tui_rl_command_key, tui_keymap);

  rl_generic_bind (ISKMAP, "\\C-x", (char*) tui_ctlx_keymap, tui_keymap);

  /* Bind all other keys to tui_rl_command_mode so that we switch
     temporarily from SingleKey mode and can enter a gdb command.  */
  for (i = ' '; i < 0x7f; i++)
    {
      int j;

      for (j = 0; tui_commands[j].cmd; j++)
        if (tui_commands[j].key == i)
          break;

      if (tui_commands[j].cmd)
        continue;

      rl_bind_key_in_map (i, tui_rl_command_mode, tui_keymap);
    }

  rl_bind_key_in_map ('a', tui_rl_switch_mode, emacs_ctlx_keymap);
  rl_bind_key_in_map ('a', tui_rl_switch_mode, tui_ctlx_keymap);
  rl_bind_key_in_map ('A', tui_rl_switch_mode, emacs_ctlx_keymap);
  rl_bind_key_in_map ('A', tui_rl_switch_mode, tui_ctlx_keymap);
  rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, emacs_ctlx_keymap);
  rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, tui_ctlx_keymap);
  rl_bind_key_in_map ('1', tui_rl_delete_other_windows, emacs_ctlx_keymap);
  rl_bind_key_in_map ('1', tui_rl_delete_other_windows, tui_ctlx_keymap);
  rl_bind_key_in_map ('2', tui_rl_change_windows, emacs_ctlx_keymap);
  rl_bind_key_in_map ('2', tui_rl_change_windows, tui_ctlx_keymap);
  rl_bind_key_in_map ('o', tui_rl_other_window, emacs_ctlx_keymap);
  rl_bind_key_in_map ('o', tui_rl_other_window, tui_ctlx_keymap);
  rl_bind_key_in_map ('q', tui_rl_next_keymap, tui_keymap);
  rl_bind_key_in_map ('s', tui_rl_next_keymap, emacs_ctlx_keymap);
  rl_bind_key_in_map ('s', tui_rl_next_keymap, tui_ctlx_keymap);
}

/* Return the TERM variable from the environment, or "<unset>"
   if not set.  */

static const char *
gdb_getenv_term (void)
{
  const char *term;

  term = getenv ("TERM");
  if (term != NULL)
    return term;
  return "<unset>";
}

/* Enter in the tui mode (curses).
   When in normal mode, it installs the tui hooks in gdb, redirects
   the gdb output, configures the readline to work in tui mode.
   When in curses mode, it does nothing.  */
void
tui_enable (void)
{
  if (tui_active)
    return;

  /* To avoid to initialize curses when gdb starts, there is a defered
     curses initialization.  This initialization is made only once
     and the first time the curses mode is entered.  */
  if (tui_finish_init)
    {
      WINDOW *w;
      SCREEN *s;
      const char *cap;
      const char *interp;

      /* If the top level interpreter is not the console/tui (e.g.,
	 MI), enabling curses will certainly lose.  */
      interp = interp_name (top_level_interpreter ());
      if (strcmp (interp, INTERP_TUI) != 0)
	error (_("Cannot enable the TUI when the interpreter is '%s'"), interp);

      /* Don't try to setup curses (and print funny control
	 characters) if we're not outputting to a terminal.  */
      if (!ui_file_isatty (gdb_stdout))
	error (_("Cannot enable the TUI when output is not a terminal"));

      s = newterm (NULL, stdout, stdin);
#ifdef __MINGW32__
      /* The MinGW port of ncurses requires $TERM to be unset in order
	 to activate the Windows console driver.  */
      if (s == NULL)
	s = newterm ("unknown", stdout, stdin);
#endif
      if (s == NULL)
	{
	  error (_("Cannot enable the TUI: error opening terminal [TERM=%s]"),
		 gdb_getenv_term ());
	}
      w = stdscr;

      /* Check required terminal capabilities.  The MinGW port of
	 ncurses does have them, but doesn't expose them through "cup".  */
#ifndef __MINGW32__
      cap = tigetstr ("cup");
      if (cap == NULL || cap == (char *) -1 || *cap == '\0')
	{
	  endwin ();
	  delscreen (s);
	  error (_("Cannot enable the TUI: "
		   "terminal doesn't support cursor addressing [TERM=%s]"),
		 gdb_getenv_term ());
	}
#endif

      cbreak ();
      noecho ();
      /* timeout (1); */
      nodelay(w, FALSE);
      nl();
      keypad (w, TRUE);
      rl_initialize ();
      tui_set_term_height_to (LINES);
      tui_set_term_width_to (COLS);
      def_prog_mode ();

      tui_show_frame_info (0);
      tui_set_layout (SRC_COMMAND);
      tui_set_win_focus_to (TUI_SRC_WIN);
      keypad (TUI_CMD_WIN->generic.handle, TRUE);
      wrefresh (TUI_CMD_WIN->generic.handle);
      tui_finish_init = 0;
    }
  else
    {
     /* Save the current gdb setting of the terminal.
        Curses will restore this state when endwin() is called.  */
     def_shell_mode ();
     clearok (stdscr, TRUE);
   }

  /* Install the TUI specific hooks.  */
  tui_install_hooks ();
  rl_startup_hook = tui_rl_startup_hook;

  tui_update_variables ();
  
  tui_setup_io (1);

  tui_active = 1;

  /* Resize windows before anything might display/refresh a
     window.  */
  if (tui_win_resized ())
    {
      tui_set_win_resized_to (FALSE);
      tui_resize_all ();
    }

  if (deprecated_safe_get_selected_frame ())
    tui_show_frame_info (deprecated_safe_get_selected_frame ());

  /* Restore TUI keymap.  */
  tui_set_key_mode (tui_current_key_mode);

  /* Refresh the screen.  */
  tui_refresh_all_win ();

  /* Update gdb's knowledge of its terminal.  */
  gdb_save_tty_state ();
  tui_update_gdb_sizes ();
}

/* Leave the tui mode.
   Remove the tui hooks and configure the gdb output and readline
   back to their original state.  The curses mode is left so that
   the terminal setting is restored to the point when we entered.  */
void
tui_disable (void)
{
  if (!tui_active)
    return;

  /* Restore initial readline keymap.  */
  rl_set_keymap (tui_readline_standard_keymap);

  /* Remove TUI hooks.  */
  tui_remove_hooks ();
  rl_startup_hook = 0;
  rl_already_prompted = 0;

  /* Leave curses and restore previous gdb terminal setting.  */
  endwin ();

  /* gdb terminal has changed, update gdb internal copy of it
     so that terminal management with the inferior works.  */
  tui_setup_io (0);

  /* Update gdb's knowledge of its terminal.  */
  gdb_save_tty_state ();

  tui_active = 0;
  tui_update_gdb_sizes ();
}

/* Command wrapper for enabling tui mode.  */

static void
tui_enable_command (char *args, int from_tty)
{
  tui_enable ();
}

/* Command wrapper for leaving tui mode.  */

static void
tui_disable_command (char *args, int from_tty)
{
  tui_disable ();
}

void
strcat_to_buf (char *buf, int buflen, 
	       const char *item_to_add)
{
  if (item_to_add != (char *) NULL && buf != (char *) NULL)
    {
      if ((strlen (buf) + strlen (item_to_add)) <= buflen)
	strcat (buf, item_to_add);
      else
	strncat (buf, item_to_add, (buflen - strlen (buf)));
    }
}

#if 0
/* Solaris <sys/termios.h> defines CTRL.  */
#ifndef CTRL
#define CTRL(x)         (x & ~0140)
#endif

#define FILEDES         2
#define CHK(val, dft)   (val<=0 ? dft : val)

static void
tui_reset (void)
{
  struct termio mode;

  /* Reset the teletype mode bits to a sensible state.
     Copied tset.c.  */
#if defined (TIOCGETC)
  struct tchars tbuf;
#endif /* TIOCGETC */
#ifdef UCB_NTTY
  struct ltchars ltc;

  if (ldisc == NTTYDISC)
    {
      ioctl (FILEDES, TIOCGLTC, &ltc);
      ltc.t_suspc = CHK (ltc.t_suspc, CTRL ('Z'));
      ltc.t_dsuspc = CHK (ltc.t_dsuspc, CTRL ('Y'));
      ltc.t_rprntc = CHK (ltc.t_rprntc, CTRL ('R'));
      ltc.t_flushc = CHK (ltc.t_flushc, CTRL ('O'));
      ltc.t_werasc = CHK (ltc.t_werasc, CTRL ('W'));
      ltc.t_lnextc = CHK (ltc.t_lnextc, CTRL ('V'));
      ioctl (FILEDES, TIOCSLTC, &ltc);
    }
#endif /* UCB_NTTY */
#ifdef TIOCGETC
  ioctl (FILEDES, TIOCGETC, &tbuf);
  tbuf.t_intrc = CHK (tbuf.t_intrc, CTRL ('?'));
  tbuf.t_quitc = CHK (tbuf.t_quitc, CTRL ('\\'));
  tbuf.t_startc = CHK (tbuf.t_startc, CTRL ('Q'));
  tbuf.t_stopc = CHK (tbuf.t_stopc, CTRL ('S'));
  tbuf.t_eofc = CHK (tbuf.t_eofc, CTRL ('D'));
  /* brkc is left alone.  */
  ioctl (FILEDES, TIOCSETC, &tbuf);
#endif /* TIOCGETC */
  mode.sg_flags &= ~(RAW
#ifdef CBREAK
		     | CBREAK
#endif /* CBREAK */
		     | VTDELAY | ALLDELAY);
  mode.sg_flags |= XTABS | ECHO | CRMOD | ANYP;

  return;
}
#endif

void
tui_show_source (const char *fullname, int line)
{
  struct symtab_and_line cursal = get_current_source_symtab_and_line ();

  /* Make sure that the source window is displayed.  */
  tui_add_win_to_layout (SRC_WIN);

  tui_update_source_windows_with_line (cursal.symtab, line);
  tui_update_locator_fullname (fullname);
}

void
tui_show_assembly (struct gdbarch *gdbarch, CORE_ADDR addr)
{
  tui_add_win_to_layout (DISASSEM_WIN);
  tui_update_source_windows_with_addr (gdbarch, addr);
}

int
tui_is_window_visible (enum tui_win_type type)
{
  if (tui_active == 0)
    return 0;

  if (tui_win_list[type] == 0)
    return 0;
  
  return tui_win_list[type]->generic.is_visible;
}

int
tui_get_command_dimension (unsigned int *width, 
			   unsigned int *height)
{
  if (!tui_active || (TUI_CMD_WIN == NULL))
    {
      return 0;
    }
  
  *width = TUI_CMD_WIN->generic.width;
  *height = TUI_CMD_WIN->generic.height;
  return 1;
}

/* Provide a prototype to silence -Wmissing-prototypes.  */
extern initialize_file_ftype _initialize_tui;

void
_initialize_tui (void)
{
  struct cmd_list_element **tuicmd;

  tuicmd = tui_get_cmd_list ();

  add_cmd ("enable", class_tui, tui_enable_command,
	   _("Enable TUI display mode."),
	   tuicmd);
  add_cmd ("disable", class_tui, tui_disable_command,
	   _("Disable TUI display mode."),
	   tuicmd);
}