qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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replay-random.c (1108B)

      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 
     17 void 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 
     27 int 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 }