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This commit is contained in:
Xiaolong Peng 2026-01-16 22:00:08 -08:00
parent 8802b94844
commit bee032ee79
1 changed files with 1 additions and 0 deletions
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src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp
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@ -582,6 +582,7 @@ public:
previous_atomic_top = atomic_top();
assert(previous_atomic_top != nullptr, "Must not");
set_top(previous_atomic_top); // Sync current _atomic_top back to _top
// previous_atomic_top MUST be stored to _top before swapping _atomic_top with nullptr
OrderAccess::fence();
if (AtomicAccess::cmpxchg(&_atomic_top, previous_atomic_top, (HeapWord*) nullptr) == previous_atomic_top) {
// break when successfully exchange _atomic_top to nullptr