aboutsummaryrefslogtreecommitdiff
path: root/gdb/tui/tui-hooks.c
blob: bfe7aeb9bc102499ac0e21ae5e4fcb361165e9d3 (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
/* GDB hooks for TUI.

   Copyright (C) 2001-2016 Free Software Foundation, Inc.

   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 "symtab.h"
#include "inferior.h"
#include "command.h"
#include "bfd.h"
#include "symfile.h"
#include "objfiles.h"
#include "target.h"
#include "gdbcore.h"
#include "event-loop.h"
#include "event-top.h"
#include "frame.h"
#include "breakpoint.h"
#include "ui-out.h"
#include "top.h"
#include "observer.h"
#include <unistd.h>
#include <fcntl.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-win.h"
#include "tui/tui-stack.h"
#include "tui/tui-windata.h"
#include "tui/tui-winsource.h"

#include "gdb_curses.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"

int tui_target_has_run = 0;

static void
tui_new_objfile_hook (struct objfile* objfile)
{
  if (tui_active)
    tui_display_main ();
}

/* Prevent recursion of deprecated_register_changed_hook().  */
static int tui_refreshing_registers = 0;

/* Observer for the register_changed notification.  */

static void
tui_register_changed (struct frame_info *frame, int regno)
{
  struct frame_info *fi;

  /* The frame of the register that was changed may differ from the selected
     frame, but we only want to show the register values of the selected frame.
     And even if the frames differ a register change made in one can still show
     up in the other.  So we always use the selected frame here, and ignore
     FRAME.  */
  fi = get_selected_frame (NULL);
  if (tui_refreshing_registers == 0)
    {
      tui_refreshing_registers = 1;
      tui_check_data_values (fi);
      tui_refreshing_registers = 0;
    }
}

/* Breakpoint creation hook.
   Update the screen to show the new breakpoint.  */
static void
tui_event_create_breakpoint (struct breakpoint *b)
{
  tui_update_all_breakpoint_info ();
}

/* Breakpoint deletion hook.
   Refresh the screen to update the breakpoint marks.  */
static void
tui_event_delete_breakpoint (struct breakpoint *b)
{
  tui_update_all_breakpoint_info ();
}

static void
tui_event_modify_breakpoint (struct breakpoint *b)
{
  tui_update_all_breakpoint_info ();
}

/* Called when a command is about to proceed the inferior.  */

static void
tui_about_to_proceed (void)
{
  /* Leave tui mode (optional).  */
#if 0
  if (tui_active)
    {
      target_terminal_ours ();
      endwin ();
      target_terminal_inferior ();
    }
#endif
  tui_target_has_run = 1;
}

/* Refresh TUI's frame and register information.  This is a hook intended to be
   used to update the screen after potential frame and register changes.

   REGISTERS_TOO_P controls whether to refresh our register information even
   if frame information hasn't changed.  */

static void
tui_refresh_frame_and_register_information (int registers_too_p)
{
  struct frame_info *fi;
  CORE_ADDR pc;
  struct cleanup *old_chain;
  int frame_info_changed_p;

  if (!has_stack_frames ())
    return;

  old_chain = make_cleanup_restore_target_terminal ();
  target_terminal_ours_for_output ();

  fi = get_selected_frame (NULL);
  /* Ensure that symbols for this frame are read in.  Also, determine
     the source language of this frame, and switch to it if
     desired.  */
  if (get_frame_pc_if_available (fi, &pc))
    {
      struct symtab *s;

      s = find_pc_line_symtab (pc);
      /* elz: This if here fixes the problem with the pc not being
	 displayed in the tui asm layout, with no debug symbols.  The
	 value of s would be 0 here, and select_source_symtab would
	 abort the command by calling the 'error' function.  */
      if (s)
	select_source_symtab (s);
    }

  /* Display the frame position (even if there is no symbols or the PC
     is not known).  */
  frame_info_changed_p = tui_show_frame_info (fi);

  /* Refresh the register window if it's visible.  */
  if (tui_is_window_visible (DATA_WIN)
      && (frame_info_changed_p || registers_too_p))
    {
      tui_refreshing_registers = 1;
      tui_check_data_values (fi);
      tui_refreshing_registers = 0;
    }

  do_cleanups (old_chain);
}

/* Dummy callback for deprecated_print_frame_info_listing_hook which is called
   from print_frame_info.  */

static void
tui_dummy_print_frame_info_listing_hook (struct symtab *s,
					 int line,
					 int stopline, 
					 int noerror)
{
}

/* Perform all necessary cleanups regarding our module's inferior data
   that is required after the inferior INF just exited.  */

static void
tui_inferior_exit (struct inferior *inf)
{
  /* Leave the SingleKey mode to make sure the gdb prompt is visible.  */
  tui_set_key_mode (TUI_COMMAND_MODE);
  tui_show_frame_info (0);
  tui_display_main ();
}

/* Observer for the before_prompt notification.  */

static void
tui_before_prompt (const char *current_gdb_prompt)
{
  /* This refresh is intended to catch changes to the selected frame following
     a call to "up", "down" or "frame".  As such we don't necessarily want to
     refresh registers here unless the frame actually changed by one of these
     commands.  Registers will otherwise be refreshed after a normal stop or by
     our tui_register_changed_hook.  */
  tui_refresh_frame_and_register_information (/*registers_too_p=*/0);
}

/* Observer for the normal_stop notification.  */

static void
tui_normal_stop (struct bpstats *bs, int print_frame)
{
  /* This refresh is intended to catch changes to the selected frame and to
     registers following a normal stop.  */
  tui_refresh_frame_and_register_information (/*registers_too_p=*/1);
}

/* Observers created when installing TUI hooks.  */
static struct observer *tui_bp_created_observer;
static struct observer *tui_bp_deleted_observer;
static struct observer *tui_bp_modified_observer;
static struct observer *tui_inferior_exit_observer;
static struct observer *tui_about_to_proceed_observer;
static struct observer *tui_before_prompt_observer;
static struct observer *tui_normal_stop_observer;
static struct observer *tui_register_changed_observer;

/* Install the TUI specific hooks.  */
void
tui_install_hooks (void)
{
  /* If this hook is not set to something then print_frame_info will
     assume that the CLI, not the TUI, is active, and will print the frame info
     for us in such a way that we are not prepared to handle.  This hook is
     otherwise effectively obsolete.  */
  deprecated_print_frame_info_listing_hook
    = tui_dummy_print_frame_info_listing_hook;

  /* Install the event hooks.  */
  tui_bp_created_observer
    = observer_attach_breakpoint_created (tui_event_create_breakpoint);
  tui_bp_deleted_observer
    = observer_attach_breakpoint_deleted (tui_event_delete_breakpoint);
  tui_bp_modified_observer
    = observer_attach_breakpoint_modified (tui_event_modify_breakpoint);
  tui_inferior_exit_observer
    = observer_attach_inferior_exit (tui_inferior_exit);
  tui_about_to_proceed_observer
    = observer_attach_about_to_proceed (tui_about_to_proceed);
  tui_before_prompt_observer
    = observer_attach_before_prompt (tui_before_prompt);
  tui_normal_stop_observer
    = observer_attach_normal_stop (tui_normal_stop);
  tui_register_changed_observer
    = observer_attach_register_changed (tui_register_changed);
}

/* Remove the TUI specific hooks.  */
void
tui_remove_hooks (void)
{
  deprecated_print_frame_info_listing_hook = 0;
  deprecated_query_hook = 0;
  /* Remove our observers.  */
  observer_detach_breakpoint_created (tui_bp_created_observer);
  tui_bp_created_observer = NULL;
  observer_detach_breakpoint_deleted (tui_bp_deleted_observer);
  tui_bp_deleted_observer = NULL;
  observer_detach_breakpoint_modified (tui_bp_modified_observer);
  tui_bp_modified_observer = NULL;
  observer_detach_inferior_exit (tui_inferior_exit_observer);
  tui_inferior_exit_observer = NULL;
  observer_detach_about_to_proceed (tui_about_to_proceed_observer);
  tui_about_to_proceed_observer = NULL;
  observer_detach_before_prompt (tui_before_prompt_observer);
  tui_before_prompt_observer = NULL;
  observer_detach_normal_stop (tui_normal_stop_observer);
  tui_normal_stop_observer = NULL;
  observer_detach_register_changed (tui_register_changed_observer);
  tui_register_changed_observer = NULL;
}

void _initialize_tui_hooks (void);

void
_initialize_tui_hooks (void)
{
  /* Install the permanent hooks.  */
  observer_attach_new_objfile (tui_new_objfile_hook);
}