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 | |
4a1bcc8c MK |
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 | |
54 | "gdb_curses.h". */ | |
55 | #include "readline/readline.h" | |
56 | ||
2611b1a5 SC |
57 | static void |
58 | tui_new_objfile_hook (struct objfile* objfile) | |
59 | { | |
60 | if (tui_active) | |
1f393769 | 61 | tui_display_main (); |
2611b1a5 SC |
62 | } |
63 | ||
3adda9d8 | 64 | /* Prevent recursion of deprecated_register_changed_hook(). */ |
2611b1a5 SC |
65 | static int tui_refreshing_registers = 0; |
66 | ||
a9bd710f PP |
67 | /* Observer for the register_changed notification. */ |
68 | ||
2611b1a5 | 69 | static void |
a9bd710f | 70 | tui_register_changed (struct frame_info *frame, int regno) |
2611b1a5 SC |
71 | { |
72 | struct frame_info *fi; | |
73 | ||
a9bd710f PP |
74 | /* The frame of the register that was changed may differ from the selected |
75 | frame, but we only want to show the register values of the selected frame. | |
76 | And even if the frames differ a register change made in one can still show | |
77 | up in the other. So we always use the selected frame here, and ignore | |
78 | FRAME. */ | |
206415a3 DJ |
79 | fi = get_selected_frame (NULL); |
80 | if (tui_refreshing_registers == 0) | |
2611b1a5 SC |
81 | { |
82 | tui_refreshing_registers = 1; | |
115ac53b | 83 | tui_check_register_values (fi); |
2611b1a5 SC |
84 | tui_refreshing_registers = 0; |
85 | } | |
86 | } | |
87 | ||
2611b1a5 SC |
88 | /* Breakpoint creation hook. |
89 | Update the screen to show the new breakpoint. */ | |
90 | static void | |
8d3788bd | 91 | tui_event_create_breakpoint (struct breakpoint *b) |
2611b1a5 | 92 | { |
0807ab7b | 93 | tui_update_all_breakpoint_info (nullptr); |
2611b1a5 SC |
94 | } |
95 | ||
96 | /* Breakpoint deletion hook. | |
97 | Refresh the screen to update the breakpoint marks. */ | |
98 | static void | |
8d3788bd | 99 | tui_event_delete_breakpoint (struct breakpoint *b) |
2611b1a5 | 100 | { |
0807ab7b | 101 | tui_update_all_breakpoint_info (b); |
2611b1a5 SC |
102 | } |
103 | ||
104 | static void | |
8d3788bd | 105 | tui_event_modify_breakpoint (struct breakpoint *b) |
2611b1a5 | 106 | { |
0807ab7b | 107 | tui_update_all_breakpoint_info (nullptr); |
2611b1a5 SC |
108 | } |
109 | ||
0986c744 PP |
110 | /* Refresh TUI's frame and register information. This is a hook intended to be |
111 | used to update the screen after potential frame and register changes. | |
112 | ||
bbcbf914 PP |
113 | REGISTERS_TOO_P controls whether to refresh our register information even |
114 | if frame information hasn't changed. */ | |
0986c744 | 115 | |
2611b1a5 | 116 | static void |
0986c744 | 117 | tui_refresh_frame_and_register_information (int registers_too_p) |
2611b1a5 SC |
118 | { |
119 | struct frame_info *fi; | |
f23d1b92 | 120 | CORE_ADDR pc; |
bbcbf914 | 121 | int frame_info_changed_p; |
2611b1a5 | 122 | |
0986c744 | 123 | if (!has_stack_frames ()) |
3adda9d8 DJ |
124 | return; |
125 | ||
223ffa71 TT |
126 | target_terminal::scoped_restore_terminal_state term_state; |
127 | target_terminal::ours_for_output (); | |
0a75489f | 128 | |
3adda9d8 | 129 | fi = get_selected_frame (NULL); |
1cc6d956 MS |
130 | /* Ensure that symbols for this frame are read in. Also, determine |
131 | the source language of this frame, and switch to it if | |
132 | desired. */ | |
f23d1b92 | 133 | if (get_frame_pc_if_available (fi, &pc)) |
2611b1a5 SC |
134 | { |
135 | struct symtab *s; | |
f23d1b92 | 136 | |
34248c3a | 137 | s = find_pc_line_symtab (pc); |
1cc6d956 | 138 | /* elz: This if here fixes the problem with the pc not being |
f23d1b92 PA |
139 | displayed in the tui asm layout, with no debug symbols. The |
140 | value of s would be 0 here, and select_source_symtab would | |
141 | abort the command by calling the 'error' function. */ | |
2611b1a5 | 142 | if (s) |
f23d1b92 PA |
143 | select_source_symtab (s); |
144 | } | |
145 | ||
146 | /* Display the frame position (even if there is no symbols or the PC | |
147 | is not known). */ | |
bbcbf914 | 148 | frame_info_changed_p = tui_show_frame_info (fi); |
f23d1b92 PA |
149 | |
150 | /* Refresh the register window if it's visible. */ | |
bbcbf914 PP |
151 | if (tui_is_window_visible (DATA_WIN) |
152 | && (frame_info_changed_p || registers_too_p)) | |
f23d1b92 PA |
153 | { |
154 | tui_refreshing_registers = 1; | |
115ac53b | 155 | tui_check_register_values (fi); |
f23d1b92 | 156 | tui_refreshing_registers = 0; |
2611b1a5 SC |
157 | } |
158 | } | |
159 | ||
0986c744 PP |
160 | /* Dummy callback for deprecated_print_frame_info_listing_hook which is called |
161 | from print_frame_info. */ | |
162 | ||
2611b1a5 | 163 | static void |
0986c744 PP |
164 | tui_dummy_print_frame_info_listing_hook (struct symtab *s, |
165 | int line, | |
166 | int stopline, | |
167 | int noerror) | |
2611b1a5 | 168 | { |
2611b1a5 SC |
169 | } |
170 | ||
d69e6a33 SC |
171 | /* Perform all necessary cleanups regarding our module's inferior data |
172 | that is required after the inferior INF just exited. */ | |
173 | ||
cda8ab40 | 174 | static void |
d69e6a33 | 175 | tui_inferior_exit (struct inferior *inf) |
cda8ab40 | 176 | { |
d69e6a33 SC |
177 | /* Leave the SingleKey mode to make sure the gdb prompt is visible. */ |
178 | tui_set_key_mode (TUI_COMMAND_MODE); | |
47d3492a | 179 | tui_show_frame_info (0); |
cda8ab40 SC |
180 | tui_display_main (); |
181 | } | |
182 | ||
0986c744 PP |
183 | /* Observer for the before_prompt notification. */ |
184 | ||
185 | static void | |
186 | tui_before_prompt (const char *current_gdb_prompt) | |
187 | { | |
188 | /* This refresh is intended to catch changes to the selected frame following | |
189 | a call to "up", "down" or "frame". As such we don't necessarily want to | |
bbcbf914 PP |
190 | refresh registers here unless the frame actually changed by one of these |
191 | commands. Registers will otherwise be refreshed after a normal stop or by | |
192 | our tui_register_changed_hook. */ | |
0986c744 PP |
193 | tui_refresh_frame_and_register_information (/*registers_too_p=*/0); |
194 | } | |
195 | ||
196 | /* Observer for the normal_stop notification. */ | |
197 | ||
198 | static void | |
199 | tui_normal_stop (struct bpstats *bs, int print_frame) | |
200 | { | |
201 | /* This refresh is intended to catch changes to the selected frame and to | |
202 | registers following a normal stop. */ | |
203 | tui_refresh_frame_and_register_information (/*registers_too_p=*/1); | |
204 | } | |
205 | ||
76727919 TT |
206 | /* Token associated with observers registered while TUI hooks are |
207 | installed. */ | |
3dcfdc58 | 208 | static const gdb::observers::token tui_observers_token {}; |
76727919 TT |
209 | |
210 | /* Attach or detach a single observer, according to ATTACH. */ | |
211 | ||
212 | template<typename T> | |
213 | static void | |
214 | attach_or_detach (T &observable, typename T::func_type func, bool attach) | |
215 | { | |
216 | if (attach) | |
217 | observable.attach (func, tui_observers_token); | |
218 | else | |
219 | observable.detach (tui_observers_token); | |
220 | } | |
221 | ||
222 | /* Attach or detach TUI observers, according to ATTACH. */ | |
223 | ||
224 | static void | |
225 | tui_attach_detach_observers (bool attach) | |
226 | { | |
227 | attach_or_detach (gdb::observers::breakpoint_created, | |
228 | tui_event_create_breakpoint, attach); | |
229 | attach_or_detach (gdb::observers::breakpoint_deleted, | |
230 | tui_event_delete_breakpoint, attach); | |
231 | attach_or_detach (gdb::observers::breakpoint_modified, | |
232 | tui_event_modify_breakpoint, attach); | |
233 | attach_or_detach (gdb::observers::inferior_exit, | |
234 | tui_inferior_exit, attach); | |
235 | attach_or_detach (gdb::observers::before_prompt, | |
236 | tui_before_prompt, attach); | |
237 | attach_or_detach (gdb::observers::normal_stop, | |
238 | tui_normal_stop, attach); | |
239 | attach_or_detach (gdb::observers::register_changed, | |
240 | tui_register_changed, attach); | |
241 | } | |
383f836e | 242 | |
2611b1a5 SC |
243 | /* Install the TUI specific hooks. */ |
244 | void | |
245 | tui_install_hooks (void) | |
246 | { | |
0986c744 PP |
247 | /* If this hook is not set to something then print_frame_info will |
248 | assume that the CLI, not the TUI, is active, and will print the frame info | |
249 | for us in such a way that we are not prepared to handle. This hook is | |
250 | otherwise effectively obsolete. */ | |
9a2b4c1b | 251 | deprecated_print_frame_info_listing_hook |
0986c744 | 252 | = tui_dummy_print_frame_info_listing_hook; |
2611b1a5 | 253 | |
2611b1a5 | 254 | /* Install the event hooks. */ |
76727919 | 255 | tui_attach_detach_observers (true); |
2611b1a5 SC |
256 | } |
257 | ||
258 | /* Remove the TUI specific hooks. */ | |
259 | void | |
260 | tui_remove_hooks (void) | |
261 | { | |
9a4105ab AC |
262 | deprecated_print_frame_info_listing_hook = 0; |
263 | deprecated_query_hook = 0; | |
76727919 | 264 | |
383f836e | 265 | /* Remove our observers. */ |
76727919 | 266 | tui_attach_detach_observers (false); |
2611b1a5 SC |
267 | } |
268 | ||
021e7609 AC |
269 | void |
270 | _initialize_tui_hooks (void) | |
2611b1a5 | 271 | { |
2611b1a5 | 272 | /* Install the permanent hooks. */ |
76727919 | 273 | gdb::observers::new_objfile.attach (tui_new_objfile_hook); |
2611b1a5 | 274 | } |