Commit | Line | Data |
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2611b1a5 | 1 | /* GDB hooks for TUI. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 2001-2019 Free Software Foundation, Inc. |
2611b1a5 SC |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
2611b1a5 SC |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
2611b1a5 SC |
19 | |
20 | #include "defs.h" | |
21 | #include "symtab.h" | |
22 | #include "inferior.h" | |
23 | #include "command.h" | |
24 | #include "bfd.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
27 | #include "target.h" | |
28 | #include "gdbcore.h" | |
29 | #include "event-loop.h" | |
2b68e2c5 | 30 | #include "event-top.h" |
2611b1a5 SC |
31 | #include "frame.h" |
32 | #include "breakpoint.h" | |
2b68e2c5 SC |
33 | #include "ui-out.h" |
34 | #include "top.h" | |
76727919 | 35 | #include "observable.h" |
583068ca | 36 | #include "source.h" |
2611b1a5 SC |
37 | #include <unistd.h> |
38 | #include <fcntl.h> | |
39 | ||
d7b2e967 | 40 | #include "tui/tui.h" |
6a83354a | 41 | #include "tui/tui-hooks.h" |
d7b2e967 AC |
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" | |
d7b2e967 | 48 | #include "tui/tui-winsource.h" |
2611b1a5 | 49 | |
6a83354a | 50 | #include "gdb_curses.h" |
96ec9981 | 51 | |
2611b1a5 SC |
52 | static void |
53 | tui_new_objfile_hook (struct objfile* objfile) | |
54 | { | |
55 | if (tui_active) | |
1f393769 | 56 | tui_display_main (); |
2611b1a5 SC |
57 | } |
58 | ||
3adda9d8 | 59 | /* Prevent recursion of deprecated_register_changed_hook(). */ |
2611b1a5 SC |
60 | static int tui_refreshing_registers = 0; |
61 | ||
a9bd710f PP |
62 | /* Observer for the register_changed notification. */ |
63 | ||
2611b1a5 | 64 | static void |
a9bd710f | 65 | tui_register_changed (struct frame_info *frame, int regno) |
2611b1a5 SC |
66 | { |
67 | struct frame_info *fi; | |
68 | ||
63356bfd TT |
69 | if (!tui_is_window_visible (DATA_WIN)) |
70 | return; | |
71 | ||
a9bd710f PP |
72 | /* The frame of the register that was changed may differ from the selected |
73 | frame, but we only want to show the register values of the selected frame. | |
74 | And even if the frames differ a register change made in one can still show | |
75 | up in the other. So we always use the selected frame here, and ignore | |
76 | FRAME. */ | |
206415a3 DJ |
77 | fi = get_selected_frame (NULL); |
78 | if (tui_refreshing_registers == 0) | |
2611b1a5 SC |
79 | { |
80 | tui_refreshing_registers = 1; | |
63356bfd | 81 | TUI_DATA_WIN->check_register_values (fi); |
2611b1a5 SC |
82 | tui_refreshing_registers = 0; |
83 | } | |
84 | } | |
85 | ||
2611b1a5 SC |
86 | /* Breakpoint creation hook. |
87 | Update the screen to show the new breakpoint. */ | |
88 | static void | |
8d3788bd | 89 | tui_event_create_breakpoint (struct breakpoint *b) |
2611b1a5 | 90 | { |
0807ab7b | 91 | tui_update_all_breakpoint_info (nullptr); |
2611b1a5 SC |
92 | } |
93 | ||
94 | /* Breakpoint deletion hook. | |
95 | Refresh the screen to update the breakpoint marks. */ | |
96 | static void | |
8d3788bd | 97 | tui_event_delete_breakpoint (struct breakpoint *b) |
2611b1a5 | 98 | { |
0807ab7b | 99 | tui_update_all_breakpoint_info (b); |
2611b1a5 SC |
100 | } |
101 | ||
102 | static void | |
8d3788bd | 103 | tui_event_modify_breakpoint (struct breakpoint *b) |
2611b1a5 | 104 | { |
0807ab7b | 105 | tui_update_all_breakpoint_info (nullptr); |
2611b1a5 SC |
106 | } |
107 | ||
0986c744 PP |
108 | /* Refresh TUI's frame and register information. This is a hook intended to be |
109 | used to update the screen after potential frame and register changes. | |
110 | ||
bbcbf914 PP |
111 | REGISTERS_TOO_P controls whether to refresh our register information even |
112 | if frame information hasn't changed. */ | |
0986c744 | 113 | |
2611b1a5 | 114 | static void |
0986c744 | 115 | tui_refresh_frame_and_register_information (int registers_too_p) |
2611b1a5 SC |
116 | { |
117 | struct frame_info *fi; | |
f23d1b92 | 118 | CORE_ADDR pc; |
bbcbf914 | 119 | int frame_info_changed_p; |
2611b1a5 | 120 | |
0986c744 | 121 | if (!has_stack_frames ()) |
3adda9d8 DJ |
122 | return; |
123 | ||
223ffa71 TT |
124 | target_terminal::scoped_restore_terminal_state term_state; |
125 | target_terminal::ours_for_output (); | |
0a75489f | 126 | |
3adda9d8 | 127 | fi = get_selected_frame (NULL); |
1cc6d956 MS |
128 | /* Ensure that symbols for this frame are read in. Also, determine |
129 | the source language of this frame, and switch to it if | |
130 | desired. */ | |
f23d1b92 | 131 | if (get_frame_pc_if_available (fi, &pc)) |
2611b1a5 SC |
132 | { |
133 | struct symtab *s; | |
f23d1b92 | 134 | |
34248c3a | 135 | s = find_pc_line_symtab (pc); |
1cc6d956 | 136 | /* elz: This if here fixes the problem with the pc not being |
f23d1b92 PA |
137 | displayed in the tui asm layout, with no debug symbols. The |
138 | value of s would be 0 here, and select_source_symtab would | |
139 | abort the command by calling the 'error' function. */ | |
2611b1a5 | 140 | if (s) |
f23d1b92 PA |
141 | select_source_symtab (s); |
142 | } | |
143 | ||
144 | /* Display the frame position (even if there is no symbols or the PC | |
145 | is not known). */ | |
bbcbf914 | 146 | frame_info_changed_p = tui_show_frame_info (fi); |
f23d1b92 PA |
147 | |
148 | /* Refresh the register window if it's visible. */ | |
bbcbf914 PP |
149 | if (tui_is_window_visible (DATA_WIN) |
150 | && (frame_info_changed_p || registers_too_p)) | |
f23d1b92 PA |
151 | { |
152 | tui_refreshing_registers = 1; | |
63356bfd | 153 | TUI_DATA_WIN->check_register_values (fi); |
f23d1b92 | 154 | tui_refreshing_registers = 0; |
2611b1a5 SC |
155 | } |
156 | } | |
157 | ||
0986c744 PP |
158 | /* Dummy callback for deprecated_print_frame_info_listing_hook which is called |
159 | from print_frame_info. */ | |
160 | ||
2611b1a5 | 161 | static void |
0986c744 PP |
162 | tui_dummy_print_frame_info_listing_hook (struct symtab *s, |
163 | int line, | |
164 | int stopline, | |
165 | int noerror) | |
2611b1a5 | 166 | { |
2611b1a5 SC |
167 | } |
168 | ||
d69e6a33 SC |
169 | /* Perform all necessary cleanups regarding our module's inferior data |
170 | that is required after the inferior INF just exited. */ | |
171 | ||
cda8ab40 | 172 | static void |
d69e6a33 | 173 | tui_inferior_exit (struct inferior *inf) |
cda8ab40 | 174 | { |
d69e6a33 SC |
175 | /* Leave the SingleKey mode to make sure the gdb prompt is visible. */ |
176 | tui_set_key_mode (TUI_COMMAND_MODE); | |
47d3492a | 177 | tui_show_frame_info (0); |
cda8ab40 SC |
178 | tui_display_main (); |
179 | } | |
180 | ||
0986c744 PP |
181 | /* Observer for the before_prompt notification. */ |
182 | ||
183 | static void | |
184 | tui_before_prompt (const char *current_gdb_prompt) | |
185 | { | |
186 | /* This refresh is intended to catch changes to the selected frame following | |
187 | a call to "up", "down" or "frame". As such we don't necessarily want to | |
bbcbf914 PP |
188 | refresh registers here unless the frame actually changed by one of these |
189 | commands. Registers will otherwise be refreshed after a normal stop or by | |
190 | our tui_register_changed_hook. */ | |
0986c744 PP |
191 | tui_refresh_frame_and_register_information (/*registers_too_p=*/0); |
192 | } | |
193 | ||
194 | /* Observer for the normal_stop notification. */ | |
195 | ||
196 | static void | |
197 | tui_normal_stop (struct bpstats *bs, int print_frame) | |
198 | { | |
199 | /* This refresh is intended to catch changes to the selected frame and to | |
200 | registers following a normal stop. */ | |
201 | tui_refresh_frame_and_register_information (/*registers_too_p=*/1); | |
202 | } | |
203 | ||
76727919 TT |
204 | /* Token associated with observers registered while TUI hooks are |
205 | installed. */ | |
3dcfdc58 | 206 | static const gdb::observers::token tui_observers_token {}; |
76727919 TT |
207 | |
208 | /* Attach or detach a single observer, according to ATTACH. */ | |
209 | ||
210 | template<typename T> | |
211 | static void | |
212 | attach_or_detach (T &observable, typename T::func_type func, bool attach) | |
213 | { | |
214 | if (attach) | |
215 | observable.attach (func, tui_observers_token); | |
216 | else | |
217 | observable.detach (tui_observers_token); | |
218 | } | |
219 | ||
220 | /* Attach or detach TUI observers, according to ATTACH. */ | |
221 | ||
222 | static void | |
223 | tui_attach_detach_observers (bool attach) | |
224 | { | |
225 | attach_or_detach (gdb::observers::breakpoint_created, | |
226 | tui_event_create_breakpoint, attach); | |
227 | attach_or_detach (gdb::observers::breakpoint_deleted, | |
228 | tui_event_delete_breakpoint, attach); | |
229 | attach_or_detach (gdb::observers::breakpoint_modified, | |
230 | tui_event_modify_breakpoint, attach); | |
231 | attach_or_detach (gdb::observers::inferior_exit, | |
232 | tui_inferior_exit, attach); | |
233 | attach_or_detach (gdb::observers::before_prompt, | |
234 | tui_before_prompt, attach); | |
235 | attach_or_detach (gdb::observers::normal_stop, | |
236 | tui_normal_stop, attach); | |
237 | attach_or_detach (gdb::observers::register_changed, | |
238 | tui_register_changed, attach); | |
239 | } | |
383f836e | 240 | |
2611b1a5 SC |
241 | /* Install the TUI specific hooks. */ |
242 | void | |
243 | tui_install_hooks (void) | |
244 | { | |
0986c744 PP |
245 | /* If this hook is not set to something then print_frame_info will |
246 | assume that the CLI, not the TUI, is active, and will print the frame info | |
247 | for us in such a way that we are not prepared to handle. This hook is | |
248 | otherwise effectively obsolete. */ | |
9a2b4c1b | 249 | deprecated_print_frame_info_listing_hook |
0986c744 | 250 | = tui_dummy_print_frame_info_listing_hook; |
2611b1a5 | 251 | |
2611b1a5 | 252 | /* Install the event hooks. */ |
76727919 | 253 | tui_attach_detach_observers (true); |
2611b1a5 SC |
254 | } |
255 | ||
256 | /* Remove the TUI specific hooks. */ | |
257 | void | |
258 | tui_remove_hooks (void) | |
259 | { | |
9a4105ab | 260 | deprecated_print_frame_info_listing_hook = 0; |
76727919 | 261 | |
383f836e | 262 | /* Remove our observers. */ |
76727919 | 263 | tui_attach_detach_observers (false); |
2611b1a5 SC |
264 | } |
265 | ||
021e7609 AC |
266 | void |
267 | _initialize_tui_hooks (void) | |
2611b1a5 | 268 | { |
2611b1a5 | 269 | /* Install the permanent hooks. */ |
76727919 | 270 | gdb::observers::new_objfile.attach (tui_new_objfile_hook); |
2611b1a5 | 271 | } |