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replay: record and replay random number sources

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Record/replay feature of icount allows deterministic running of execution
scenarios. Some CPUs and peripheral devices read random numbers from
external sources making deterministic execution impossible.
This patch adds recording and replaying of random read operations
into guest-random module, which is used by the virtual hardware.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Message-Id: <157675984852.14505.15709141760677102489.stgit@pasha-Precision-3630-Tower>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2019-12-19 15:50:48 +03:00 • committed by Paolo Bonzini
parent fc6b2dbac1
commit 878ec29b9c
8 changed files with 77 additions and 4 deletions
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9
stubs/replay.c
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@ -79,3 +79,12 @@ void replay_mutex_lock(void)
void replay_mutex_unlock(void)
{
}
void replay_save_random(int ret, void *buf, size_t len)
{
}
int replay_read_random(void *buf, size_t len)
{
return 0;
}