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8265759: Shenandoah: Avoid race for referent in assert

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Reviewed-by: shade, zgu
This commit is contained in:
Roman Kennke 2021-04-23 08:01:36 +00:00
parent b3a319c834
commit 191f1fc46c
1 changed files with 5 additions and 2 deletions
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7
src/hotspot/share/gc/shenandoah/shenandoahReferenceProcessor.cpp
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@ -386,8 +386,11 @@ template <typename T>
oop ShenandoahReferenceProcessor::drop(oop reference, ReferenceType type) {
log_trace(gc, ref)("Dropped Reference: " PTR_FORMAT " (%s)", p2i(reference), reference_type_name(type));
assert(reference_referent<T>(reference) == NULL ||
ShenandoahHeap::heap()->marking_context()->is_marked(reference_referent<T>(reference)), "only drop references with alive referents");
#ifdef ASSERT
oop referent = reference_referent<T>(reference);
assert(referent == NULL || ShenandoahHeap::heap()->marking_context()->is_marked(referent),
"only drop references with alive referents");
#endif
// Unlink and return next in list
oop next = reference_discovered<T>(reference);