3 Copyright (C) 2001-2019 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/>. */
29 #include "event-loop.h"
30 #include "event-top.h"
32 #include "breakpoint.h"
35 #include "observable.h"
41 #include "tui/tui-hooks.h"
42 #include "tui/tui-data.h"
43 #include "tui/tui-layout.h"
44 #include "tui/tui-io.h"
45 #include "tui/tui-regs.h"
46 #include "tui/tui-win.h"
47 #include "tui/tui-stack.h"
48 #include "tui/tui-winsource.h"
50 #include "gdb_curses.h"
52 /* This redefines CTRL if it is not already defined, so it must come
53 after terminal state releated include files like <term.h> and
55 #include "readline/readline.h"
58 tui_new_objfile_hook (struct objfile
* objfile
)
64 /* Prevent recursion of deprecated_register_changed_hook(). */
65 static int tui_refreshing_registers
= 0;
67 /* Observer for the register_changed notification. */
70 tui_register_changed (struct frame_info
*frame
, int regno
)
72 struct frame_info
*fi
;
74 if (!tui_is_window_visible (DATA_WIN
))
77 /* The frame of the register that was changed may differ from the selected
78 frame, but we only want to show the register values of the selected frame.
79 And even if the frames differ a register change made in one can still show
80 up in the other. So we always use the selected frame here, and ignore
82 fi
= get_selected_frame (NULL
);
83 if (tui_refreshing_registers
== 0)
85 tui_refreshing_registers
= 1;
86 TUI_DATA_WIN
->check_register_values (fi
);
87 tui_refreshing_registers
= 0;
91 /* Breakpoint creation hook.
92 Update the screen to show the new breakpoint. */
94 tui_event_create_breakpoint (struct breakpoint
*b
)
96 tui_update_all_breakpoint_info (nullptr);
99 /* Breakpoint deletion hook.
100 Refresh the screen to update the breakpoint marks. */
102 tui_event_delete_breakpoint (struct breakpoint
*b
)
104 tui_update_all_breakpoint_info (b
);
108 tui_event_modify_breakpoint (struct breakpoint
*b
)
110 tui_update_all_breakpoint_info (nullptr);
113 /* Refresh TUI's frame and register information. This is a hook intended to be
114 used to update the screen after potential frame and register changes.
116 REGISTERS_TOO_P controls whether to refresh our register information even
117 if frame information hasn't changed. */
120 tui_refresh_frame_and_register_information (int registers_too_p
)
122 struct frame_info
*fi
;
124 int frame_info_changed_p
;
126 if (!has_stack_frames ())
129 target_terminal::scoped_restore_terminal_state term_state
;
130 target_terminal::ours_for_output ();
132 fi
= get_selected_frame (NULL
);
133 /* Ensure that symbols for this frame are read in. Also, determine
134 the source language of this frame, and switch to it if
136 if (get_frame_pc_if_available (fi
, &pc
))
140 s
= find_pc_line_symtab (pc
);
141 /* elz: This if here fixes the problem with the pc not being
142 displayed in the tui asm layout, with no debug symbols. The
143 value of s would be 0 here, and select_source_symtab would
144 abort the command by calling the 'error' function. */
146 select_source_symtab (s
);
149 /* Display the frame position (even if there is no symbols or the PC
151 frame_info_changed_p
= tui_show_frame_info (fi
);
153 /* Refresh the register window if it's visible. */
154 if (tui_is_window_visible (DATA_WIN
)
155 && (frame_info_changed_p
|| registers_too_p
))
157 tui_refreshing_registers
= 1;
158 TUI_DATA_WIN
->check_register_values (fi
);
159 tui_refreshing_registers
= 0;
163 /* Dummy callback for deprecated_print_frame_info_listing_hook which is called
164 from print_frame_info. */
167 tui_dummy_print_frame_info_listing_hook (struct symtab
*s
,
174 /* Perform all necessary cleanups regarding our module's inferior data
175 that is required after the inferior INF just exited. */
178 tui_inferior_exit (struct inferior
*inf
)
180 /* Leave the SingleKey mode to make sure the gdb prompt is visible. */
181 tui_set_key_mode (TUI_COMMAND_MODE
);
182 tui_show_frame_info (0);
186 /* Observer for the before_prompt notification. */
189 tui_before_prompt (const char *current_gdb_prompt
)
191 /* This refresh is intended to catch changes to the selected frame following
192 a call to "up", "down" or "frame". As such we don't necessarily want to
193 refresh registers here unless the frame actually changed by one of these
194 commands. Registers will otherwise be refreshed after a normal stop or by
195 our tui_register_changed_hook. */
196 tui_refresh_frame_and_register_information (/*registers_too_p=*/0);
199 /* Observer for the normal_stop notification. */
202 tui_normal_stop (struct bpstats
*bs
, int print_frame
)
204 /* This refresh is intended to catch changes to the selected frame and to
205 registers following a normal stop. */
206 tui_refresh_frame_and_register_information (/*registers_too_p=*/1);
209 /* Token associated with observers registered while TUI hooks are
211 static const gdb::observers::token tui_observers_token
{};
213 /* Attach or detach a single observer, according to ATTACH. */
217 attach_or_detach (T
&observable
, typename
T::func_type func
, bool attach
)
220 observable
.attach (func
, tui_observers_token
);
222 observable
.detach (tui_observers_token
);
225 /* Attach or detach TUI observers, according to ATTACH. */
228 tui_attach_detach_observers (bool attach
)
230 attach_or_detach (gdb::observers::breakpoint_created
,
231 tui_event_create_breakpoint
, attach
);
232 attach_or_detach (gdb::observers::breakpoint_deleted
,
233 tui_event_delete_breakpoint
, attach
);
234 attach_or_detach (gdb::observers::breakpoint_modified
,
235 tui_event_modify_breakpoint
, attach
);
236 attach_or_detach (gdb::observers::inferior_exit
,
237 tui_inferior_exit
, attach
);
238 attach_or_detach (gdb::observers::before_prompt
,
239 tui_before_prompt
, attach
);
240 attach_or_detach (gdb::observers::normal_stop
,
241 tui_normal_stop
, attach
);
242 attach_or_detach (gdb::observers::register_changed
,
243 tui_register_changed
, attach
);
246 /* Install the TUI specific hooks. */
248 tui_install_hooks (void)
250 /* If this hook is not set to something then print_frame_info will
251 assume that the CLI, not the TUI, is active, and will print the frame info
252 for us in such a way that we are not prepared to handle. This hook is
253 otherwise effectively obsolete. */
254 deprecated_print_frame_info_listing_hook
255 = tui_dummy_print_frame_info_listing_hook
;
257 /* Install the event hooks. */
258 tui_attach_detach_observers (true);
261 /* Remove the TUI specific hooks. */
263 tui_remove_hooks (void)
265 deprecated_print_frame_info_listing_hook
= 0;
267 /* Remove our observers. */
268 tui_attach_detach_observers (false);
272 _initialize_tui_hooks (void)
274 /* Install the permanent hooks. */
275 gdb::observers::new_objfile
.attach (tui_new_objfile_hook
);