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8232534: Shenandoah: guard against reentrant ShenandoahHeapLock locking

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Reviewed-by: rkennke
This commit is contained in:
Aleksey Shipilev 2019-10-17 20:56:04 +02:00
parent 2324892e0b
commit 86f50ba1ef
1 changed files with 3 additions and 0 deletions
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3
src/hotspot/share/gc/shenandoah/shenandoahLock.hpp
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@ -41,6 +41,9 @@ public:
ShenandoahLock() : _state(unlocked), _owner(NULL) {};
void lock() {
#ifdef ASSERT
assert(_owner != Thread::current(), "reentrant locking attempt, would deadlock");
#endif
Thread::SpinAcquire(&_state, "Shenandoah Heap Lock");
#ifdef ASSERT
assert(_state == locked, "must be locked");