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replay: interrupts and exceptions

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This patch includes modifications of common cpu files. All interrupts and
exceptions occured during recording are written into the replay log.
These events allow correct replaying the execution by kicking cpu thread
when one of these events is found in the log.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150917162416.8676.57647.stgit@PASHA-ISP.def.inno>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2015-09-17 19:24:16 +03:00 • committed by Paolo Bonzini
parent 8b42704441
commit 6f0609697f
5 changed files with 146 additions and 10 deletions
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67
replay/replay.c
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@ -79,3 +79,70 @@ void replay_account_executed_instructions(void)
replay_mutex_unlock();
}
}
bool replay_exception(void)
{
if (replay_mode == REPLAY_MODE_RECORD) {
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_EXCEPTION);
replay_mutex_unlock();
return true;
} else if (replay_mode == REPLAY_MODE_PLAY) {
bool res = replay_has_exception();
if (res) {
replay_mutex_lock();
replay_finish_event();
replay_mutex_unlock();
}
return res;
}
return true;
}
bool replay_has_exception(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
replay_account_executed_instructions();
replay_mutex_lock();
res = replay_next_event_is(EVENT_EXCEPTION);
replay_mutex_unlock();
}
return res;
}
bool replay_interrupt(void)
{
if (replay_mode == REPLAY_MODE_RECORD) {
replay_save_instructions();
replay_mutex_lock();
replay_put_event(EVENT_INTERRUPT);
replay_mutex_unlock();
return true;
} else if (replay_mode == REPLAY_MODE_PLAY) {
bool res = replay_has_interrupt();
if (res) {
replay_mutex_lock();
replay_finish_event();
replay_mutex_unlock();
}
return res;
}
return true;
}
bool replay_has_interrupt(void)
{
bool res = false;
if (replay_mode == REPLAY_MODE_PLAY) {
replay_account_executed_instructions();
replay_mutex_lock();
res = replay_next_event_is(EVENT_INTERRUPT);
replay_mutex_unlock();
}
return res;
}