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c0c071d0 PD |
1 | /* |
2 | * replay-events.c | |
3 | * | |
4 | * Copyright (c) 2010-2015 Institute for System Programming | |
5 | * of the Russian Academy of Sciences. | |
6 | * | |
7 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
8 | * See the COPYING file in the top-level directory. | |
9 | * | |
10 | */ | |
11 | ||
d38ea87a | 12 | #include "qemu/osdep.h" |
c0c071d0 PD |
13 | #include "qemu-common.h" |
14 | #include "qemu/error-report.h" | |
15 | #include "sysemu/replay.h" | |
16 | #include "replay-internal.h" | |
8a354bd9 | 17 | #include "block/aio.h" |
ee312992 | 18 | #include "ui/input.h" |
c0c071d0 PD |
19 | |
20 | typedef struct Event { | |
21 | ReplayAsyncEventKind event_kind; | |
22 | void *opaque; | |
23 | void *opaque2; | |
24 | uint64_t id; | |
25 | ||
26 | QTAILQ_ENTRY(Event) events; | |
27 | } Event; | |
28 | ||
29 | static QTAILQ_HEAD(, Event) events_list = QTAILQ_HEAD_INITIALIZER(events_list); | |
30 | static unsigned int read_event_kind = -1; | |
31 | static uint64_t read_id = -1; | |
32 | static int read_checkpoint = -1; | |
33 | ||
34 | static bool events_enabled; | |
35 | ||
36 | /* Functions */ | |
37 | ||
38 | static void replay_run_event(Event *event) | |
39 | { | |
40 | switch (event->event_kind) { | |
8a354bd9 PD |
41 | case REPLAY_ASYNC_EVENT_BH: |
42 | aio_bh_call(event->opaque); | |
43 | break; | |
ee312992 PD |
44 | case REPLAY_ASYNC_EVENT_INPUT: |
45 | qemu_input_event_send_impl(NULL, (InputEvent *)event->opaque); | |
46 | qapi_free_InputEvent((InputEvent *)event->opaque); | |
47 | break; | |
48 | case REPLAY_ASYNC_EVENT_INPUT_SYNC: | |
49 | qemu_input_event_sync_impl(); | |
50 | break; | |
33577b47 PD |
51 | case REPLAY_ASYNC_EVENT_CHAR_READ: |
52 | replay_event_char_read_run(event->opaque); | |
53 | break; | |
c0c071d0 PD |
54 | default: |
55 | error_report("Replay: invalid async event ID (%d) in the queue", | |
56 | event->event_kind); | |
57 | exit(1); | |
58 | break; | |
59 | } | |
60 | } | |
61 | ||
62 | void replay_enable_events(void) | |
63 | { | |
64 | events_enabled = true; | |
65 | } | |
66 | ||
67 | bool replay_has_events(void) | |
68 | { | |
69 | return !QTAILQ_EMPTY(&events_list); | |
70 | } | |
71 | ||
72 | void replay_flush_events(void) | |
73 | { | |
74 | replay_mutex_lock(); | |
75 | while (!QTAILQ_EMPTY(&events_list)) { | |
76 | Event *event = QTAILQ_FIRST(&events_list); | |
77 | replay_mutex_unlock(); | |
78 | replay_run_event(event); | |
79 | replay_mutex_lock(); | |
80 | QTAILQ_REMOVE(&events_list, event, events); | |
81 | g_free(event); | |
82 | } | |
83 | replay_mutex_unlock(); | |
84 | } | |
85 | ||
86 | void replay_disable_events(void) | |
87 | { | |
88 | if (replay_mode != REPLAY_MODE_NONE) { | |
89 | events_enabled = false; | |
90 | /* Flush events queue before waiting of completion */ | |
91 | replay_flush_events(); | |
92 | } | |
93 | } | |
94 | ||
95 | void replay_clear_events(void) | |
96 | { | |
97 | replay_mutex_lock(); | |
98 | while (!QTAILQ_EMPTY(&events_list)) { | |
99 | Event *event = QTAILQ_FIRST(&events_list); | |
100 | QTAILQ_REMOVE(&events_list, event, events); | |
101 | ||
102 | g_free(event); | |
103 | } | |
104 | replay_mutex_unlock(); | |
105 | } | |
106 | ||
107 | /*! Adds specified async event to the queue */ | |
33577b47 PD |
108 | void replay_add_event(ReplayAsyncEventKind event_kind, |
109 | void *opaque, | |
110 | void *opaque2, uint64_t id) | |
c0c071d0 PD |
111 | { |
112 | assert(event_kind < REPLAY_ASYNC_COUNT); | |
113 | ||
114 | if (!replay_file || replay_mode == REPLAY_MODE_NONE | |
115 | || !events_enabled) { | |
116 | Event e; | |
117 | e.event_kind = event_kind; | |
118 | e.opaque = opaque; | |
119 | e.opaque2 = opaque2; | |
120 | e.id = id; | |
121 | replay_run_event(&e); | |
122 | return; | |
123 | } | |
124 | ||
125 | Event *event = g_malloc0(sizeof(Event)); | |
126 | event->event_kind = event_kind; | |
127 | event->opaque = opaque; | |
128 | event->opaque2 = opaque2; | |
129 | event->id = id; | |
130 | ||
131 | replay_mutex_lock(); | |
132 | QTAILQ_INSERT_TAIL(&events_list, event, events); | |
133 | replay_mutex_unlock(); | |
134 | } | |
8a354bd9 PD |
135 | |
136 | void replay_bh_schedule_event(QEMUBH *bh) | |
137 | { | |
138 | if (replay_mode != REPLAY_MODE_NONE) { | |
139 | uint64_t id = replay_get_current_step(); | |
140 | replay_add_event(REPLAY_ASYNC_EVENT_BH, bh, NULL, id); | |
141 | } else { | |
142 | qemu_bh_schedule(bh); | |
143 | } | |
144 | } | |
c0c071d0 | 145 | |
ee312992 PD |
146 | void replay_add_input_event(struct InputEvent *event) |
147 | { | |
148 | replay_add_event(REPLAY_ASYNC_EVENT_INPUT, event, NULL, 0); | |
149 | } | |
150 | ||
151 | void replay_add_input_sync_event(void) | |
152 | { | |
153 | replay_add_event(REPLAY_ASYNC_EVENT_INPUT_SYNC, NULL, NULL, 0); | |
154 | } | |
155 | ||
c0c071d0 PD |
156 | static void replay_save_event(Event *event, int checkpoint) |
157 | { | |
158 | if (replay_mode != REPLAY_MODE_PLAY) { | |
159 | /* put the event into the file */ | |
160 | replay_put_event(EVENT_ASYNC); | |
161 | replay_put_byte(checkpoint); | |
162 | replay_put_byte(event->event_kind); | |
163 | ||
164 | /* save event-specific data */ | |
165 | switch (event->event_kind) { | |
8a354bd9 PD |
166 | case REPLAY_ASYNC_EVENT_BH: |
167 | replay_put_qword(event->id); | |
168 | break; | |
ee312992 PD |
169 | case REPLAY_ASYNC_EVENT_INPUT: |
170 | replay_save_input_event(event->opaque); | |
171 | break; | |
172 | case REPLAY_ASYNC_EVENT_INPUT_SYNC: | |
173 | break; | |
33577b47 PD |
174 | case REPLAY_ASYNC_EVENT_CHAR_READ: |
175 | replay_event_char_read_save(event->opaque); | |
176 | break; | |
c0c071d0 PD |
177 | default: |
178 | error_report("Unknown ID %d of replay event", read_event_kind); | |
179 | exit(1); | |
c0c071d0 PD |
180 | } |
181 | } | |
182 | } | |
183 | ||
184 | /* Called with replay mutex locked */ | |
185 | void replay_save_events(int checkpoint) | |
186 | { | |
187 | while (!QTAILQ_EMPTY(&events_list)) { | |
188 | Event *event = QTAILQ_FIRST(&events_list); | |
189 | replay_save_event(event, checkpoint); | |
190 | ||
191 | replay_mutex_unlock(); | |
192 | replay_run_event(event); | |
193 | replay_mutex_lock(); | |
194 | QTAILQ_REMOVE(&events_list, event, events); | |
195 | g_free(event); | |
196 | } | |
197 | } | |
198 | ||
199 | static Event *replay_read_event(int checkpoint) | |
200 | { | |
201 | Event *event; | |
202 | if (read_event_kind == -1) { | |
203 | read_checkpoint = replay_get_byte(); | |
204 | read_event_kind = replay_get_byte(); | |
205 | read_id = -1; | |
206 | replay_check_error(); | |
207 | } | |
208 | ||
209 | if (checkpoint != read_checkpoint) { | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | /* Events that has not to be in the queue */ | |
214 | switch (read_event_kind) { | |
8a354bd9 PD |
215 | case REPLAY_ASYNC_EVENT_BH: |
216 | if (read_id == -1) { | |
217 | read_id = replay_get_qword(); | |
218 | } | |
219 | break; | |
ee312992 PD |
220 | case REPLAY_ASYNC_EVENT_INPUT: |
221 | event = g_malloc0(sizeof(Event)); | |
222 | event->event_kind = read_event_kind; | |
223 | event->opaque = replay_read_input_event(); | |
224 | return event; | |
225 | case REPLAY_ASYNC_EVENT_INPUT_SYNC: | |
226 | event = g_malloc0(sizeof(Event)); | |
227 | event->event_kind = read_event_kind; | |
228 | event->opaque = 0; | |
229 | return event; | |
33577b47 PD |
230 | case REPLAY_ASYNC_EVENT_CHAR_READ: |
231 | event = g_malloc0(sizeof(Event)); | |
232 | event->event_kind = read_event_kind; | |
233 | event->opaque = replay_event_char_read_load(); | |
234 | return event; | |
c0c071d0 PD |
235 | default: |
236 | error_report("Unknown ID %d of replay event", read_event_kind); | |
237 | exit(1); | |
238 | break; | |
239 | } | |
240 | ||
241 | QTAILQ_FOREACH(event, &events_list, events) { | |
242 | if (event->event_kind == read_event_kind | |
243 | && (read_id == -1 || read_id == event->id)) { | |
244 | break; | |
245 | } | |
246 | } | |
247 | ||
248 | if (event) { | |
249 | QTAILQ_REMOVE(&events_list, event, events); | |
250 | } else { | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | /* Read event-specific data */ | |
255 | ||
256 | return event; | |
257 | } | |
258 | ||
259 | /* Called with replay mutex locked */ | |
260 | void replay_read_events(int checkpoint) | |
261 | { | |
262 | while (replay_data_kind == EVENT_ASYNC) { | |
263 | Event *event = replay_read_event(checkpoint); | |
264 | if (!event) { | |
265 | break; | |
266 | } | |
267 | replay_mutex_unlock(); | |
268 | replay_run_event(event); | |
269 | replay_mutex_lock(); | |
270 | ||
271 | g_free(event); | |
272 | replay_finish_event(); | |
273 | read_event_kind = -1; | |
274 | } | |
275 | } | |
276 | ||
277 | void replay_init_events(void) | |
278 | { | |
279 | read_event_kind = -1; | |
280 | } | |
281 | ||
282 | void replay_finish_events(void) | |
283 | { | |
284 | events_enabled = false; | |
285 | replay_clear_events(); | |
286 | } | |
287 | ||
288 | bool replay_events_enabled(void) | |
289 | { | |
290 | return events_enabled; | |
291 | } |