1 /*
2  * replay-time.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 
12 #include "qemu/osdep.h"
13 #include "qemu-common.h"
14 #include "sysemu/replay.h"
15 #include "replay-internal.h"
16 #include "qemu/error-report.h"
17 
replay_save_clock(ReplayClockKind kind,int64_t clock)18 int64_t replay_save_clock(ReplayClockKind kind, int64_t clock)
19 {
20 
21     if (replay_file) {
22         g_assert(replay_mutex_locked());
23 
24         replay_save_instructions();
25         replay_put_event(EVENT_CLOCK + kind);
26         replay_put_qword(clock);
27     }
28 
29     return clock;
30 }
31 
replay_read_next_clock(ReplayClockKind kind)32 void replay_read_next_clock(ReplayClockKind kind)
33 {
34     unsigned int read_kind = replay_state.data_kind - EVENT_CLOCK;
35 
36     assert(read_kind == kind);
37 
38     int64_t clock = replay_get_qword();
39 
40     replay_check_error();
41     replay_finish_event();
42 
43     replay_state.cached_clock[read_kind] = clock;
44 }
45 
46 /*! Reads next clock event from the input. */
replay_read_clock(ReplayClockKind kind)47 int64_t replay_read_clock(ReplayClockKind kind)
48 {
49     g_assert(replay_file && replay_mutex_locked());
50 
51     replay_account_executed_instructions();
52 
53     if (replay_file) {
54         int64_t ret;
55         if (replay_next_event_is(EVENT_CLOCK + kind)) {
56             replay_read_next_clock(kind);
57         }
58         ret = replay_state.cached_clock[kind];
59 
60         return ret;
61     }
62 
63     error_report("REPLAY INTERNAL ERROR %d", __LINE__);
64     exit(1);
65 }
66