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8251460: Fix the biased-locking code in ObjectSynchronizer::FastHashCode

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Reviewed-by: coleenp, dcubed, pchilanomate
This commit is contained in:
David Holmes 2020-08-13 00:20:42 -04:00
parent 60745d14ec
commit 07c3021936
1 changed files with 5 additions and 5 deletions
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10
src/hotspot/share/runtime/synchronizer.cpp
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@ -1007,11 +1007,11 @@ intptr_t ObjectSynchronizer::FastHashCode(Thread* self, oop obj) {
if (obj->mark().has_bias_pattern()) { if (obj->mark().has_bias_pattern()) {
// Handle for oop obj in case of STW safepoint // Handle for oop obj in case of STW safepoint
Handle hobj(self, obj); Handle hobj(self, obj);
// Relaxing assertion for bug 6320749. if (SafepointSynchronize::is_at_safepoint()) {
assert(Universe::verify_in_progress() || BiasedLocking::revoke_at_safepoint(hobj);
!SafepointSynchronize::is_at_safepoint(), } else {
"biases should not be seen by VM thread here"); BiasedLocking::revoke(hobj, self);
BiasedLocking::revoke(hobj, JavaThread::current()); }
obj = hobj(); obj = hobj();
assert(!obj->mark().has_bias_pattern(), "biases should be revoked by now"); assert(!obj->mark().has_bias_pattern(), "biases should be revoked by now");
} }