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 "qemu-common.h"
  14 #include "sysemu/replay.h"
  15 #include "replay-internal.h"
  16 #include "qemu/error-report.h"
  17
  18 int64_t replay_save_clock(ReplayClockKind kind, int64_t clock)
  19 {
  20     replay_save_instructions();
  21
  22     if (replay_file) {
  23         replay_mutex_lock();
  24         replay_put_event(EVENT_CLOCK + kind);
  25         replay_put_qword(clock);
  26         replay_mutex_unlock();
  27     }
  28
  29     return clock;
  30 }
  31
  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. */
  47 int64_t replay_read_clock(ReplayClockKind kind)
  48 {
  49     replay_account_executed_instructions();
  50
  51     if (replay_file) {
  52         int64_t ret;
  53         replay_mutex_lock();
  54         if (replay_next_event_is(EVENT_CLOCK + kind)) {
  55             replay_read_next_clock(kind);
  56         }
  57         ret = replay_state.cached_clock[kind];
  58         replay_mutex_unlock();
  59
  60         return ret;
  61     }
  62
  63     error_report("REPLAY INTERNAL ERROR %d", __LINE__);
  64     exit(1);
  65 }