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-common.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 {
  19     replay_save_instructions();
  20
  21     if (replay_file) {
  22         replay_mutex_lock();
  23         replay_put_event(EVENT_CLOCK + kind);
  24         replay_put_qword(clock);
  25         replay_mutex_unlock();
  26     }
  27
  28     return clock;
  29 }
  30
  31 void replay_read_next_clock(ReplayClockKind kind)
  32 {
  33     unsigned int read_kind = replay_data_kind - EVENT_CLOCK;
  34
  35     assert(read_kind == kind);
  36
  37     int64_t clock = replay_get_qword();
  38
  39     replay_check_error();
  40     replay_finish_event();
  41
  42     replay_state.cached_clock[read_kind] = clock;
  43 }
  44
  45 /*! Reads next clock event from the input. */
  46 int64_t replay_read_clock(ReplayClockKind kind)
  47 {
  48     replay_account_executed_instructions();
  49
  50     if (replay_file) {
  51         int64_t ret;
  52         replay_mutex_lock();
  53         if (replay_next_event_is(EVENT_CLOCK + kind)) {
  54             replay_read_next_clock(kind);
  55         }
  56         ret = replay_state.cached_clock[kind];
  57         replay_mutex_unlock();
  58
  59         return ret;
  60     }
  61
  62     error_report("REPLAY INTERNAL ERROR %d", __LINE__);
  63     exit(1);
  64 }