replay/replay-time.c

   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
  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
  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. */
  49 int64_t replay_read_clock(ReplayClockKind kind)
  50 {
  51     int64_t ret;
  52     g_assert(replay_file && replay_mutex_locked());
  53
  54     replay_account_executed_instructions();
  55
  56     if (replay_next_event_is(EVENT_CLOCK + kind)) {
  57         replay_read_next_clock(kind);
  58     }
  59     ret = replay_state.cached_clock[kind];
  60
  61     return ret;
  62 }