xref: /qemu/replay/replay-time.c (revision 66997c42) 
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 "sysemu/replay.h"
14 #include "replay-internal.h"
15 #include "qemu/error-report.h"
16 
replay_save_clock(ReplayClockKind kind,int64_t clock,int64_t raw_icount)17 int64_t replay_save_clock(ReplayClockKind kind, int64_t clock,
18                           int64_t raw_icount)
19 {
20     g_assert(replay_file);
21     g_assert(replay_mutex_locked());
22 
23     /*
24      * Due to the caller's locking requirements we get the icount from it
25      * instead of using replay_save_instructions().
26      */
27     replay_advance_current_icount(raw_icount);
28     replay_put_event(EVENT_CLOCK + kind);
29     replay_put_qword(clock);
30 
31     return clock;
32 }
33 
replay_read_next_clock(ReplayClockKind kind)34 void replay_read_next_clock(ReplayClockKind kind)
35 {
36     unsigned int read_kind = replay_state.data_kind - EVENT_CLOCK;
37 
38     assert(read_kind == kind);
39 
40     int64_t clock = replay_get_qword();
41 
42     replay_check_error();
43     replay_finish_event();
44 
45     replay_state.cached_clock[read_kind] = clock;
46 }
47 
48 /*! Reads next clock event from the input. */
replay_read_clock(ReplayClockKind kind,int64_t raw_icount)49 int64_t replay_read_clock(ReplayClockKind kind, int64_t raw_icount)
50 {
51     g_assert(replay_file && replay_mutex_locked());
52 
53     replay_advance_current_icount(raw_icount);
54 
55     if (replay_next_event_is(EVENT_CLOCK + kind)) {
56         replay_read_next_clock(kind);
57     }
58     return replay_state.cached_clock[kind];
59 }
60