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src/hotspot/share/runtime/objectMonitor.cpp
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rev 47413 : Introduce SafepointMechanism
rev 47415 : Add Thread Local handshakes and thread local polling
*** 1281,1291 ****
// Drop the lock
OrderAccess::release_store_ptr(&_owner, NULL);
OrderAccess::fence(); // ST _owner vs LD in unpark()
! if (SafepointMechanism::poll()) {
TEVENT(unpark before SAFEPOINT);
}
DTRACE_MONITOR_PROBE(contended__exit, this, object(), Self);
Trigger->unpark();
--- 1281,1291 ----
// Drop the lock
OrderAccess::release_store_ptr(&_owner, NULL);
OrderAccess::fence(); // ST _owner vs LD in unpark()
! if (SafepointMechanism::poll(Self)) {
TEVENT(unpark before SAFEPOINT);
}
DTRACE_MONITOR_PROBE(contended__exit, this, object(), Self);
Trigger->unpark();
*** 1935,1945 ****
// (a) this thread, if unsafe, doesn't delay the safepoint, and (b)
// this thread, if safe, doesn't steal cycles from GC.
// This is in keeping with the "no loitering in runtime" rule.
// We periodically check to see if there's a safepoint pending.
if ((ctr & 0xFF) == 0) {
! if (SafepointMechanism::poll()) {
TEVENT(Spin: safepoint);
goto Abort; // abrupt spin egress
}
if (Knob_UsePause & 1) SpinPause();
}
--- 1935,1945 ----
// (a) this thread, if unsafe, doesn't delay the safepoint, and (b)
// this thread, if safe, doesn't steal cycles from GC.
// This is in keeping with the "no loitering in runtime" rule.
// We periodically check to see if there's a safepoint pending.
if ((ctr & 0xFF) == 0) {
! if (SafepointMechanism::poll(Self)) {
TEVENT(Spin: safepoint);
goto Abort; // abrupt spin egress
}
if (Knob_UsePause & 1) SpinPause();
}
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