LXR qemu/replay/replay-random.c

   1/*
   2 * replay-random.c
   3 *
   4 * Copyright (c) 2010-2020 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/error-report.h"
  14#include "sysemu/replay.h"
  15#include "replay-internal.h"
  16
  17void replay_save_random(int ret, void *buf, size_t len)
  18{
  19    g_assert(replay_mutex_locked());
  20
  21    replay_save_instructions();
  22    replay_put_event(EVENT_RANDOM);
  23    replay_put_dword(ret);
  24    replay_put_array(buf, len);
  25}
  26
  27int replay_read_random(void *buf, size_t len)
  28{
  29    int ret = 0;
  30    g_assert(replay_mutex_locked());
  31
  32    replay_account_executed_instructions();
  33    if (replay_next_event_is(EVENT_RANDOM)) {
  34        size_t buf_size = 0;
  35        ret = replay_get_dword();
  36        replay_get_array(buf, &buf_size);
  37        replay_finish_event();
  38        g_assert(buf_size == len);
  39    } else {
  40        error_report("Missing random event in the replay log");
  41        exit(1);
  42    }
  43    return ret;
  44}
  45