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8256754: Deoptimization::revoke_for_object_deoptimization: stack processing start call is redundant

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Reviewed-by: dlong, eosterlund
This commit is contained in:
Richard Reingruber 2020-11-30 08:37:06 +00:00
parent 738efea9c6
commit e77aed624e
4 changed files with 21 additions and 4 deletions
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16
src/hotspot/share/runtime/keepStackGCProcessed.cpp
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@ -58,3 +58,19 @@ KeepStackGCProcessedMark::~KeepStackGCProcessedMark() {
void KeepStackGCProcessedMark::finish_processing() {
StackWatermarkSet::finish_processing(_jt, NULL /* context */, StackWatermarkKind::gc);
}
#ifdef ASSERT
bool KeepStackGCProcessedMark::stack_is_kept_gc_processed(JavaThread* jt) {
if (!Thread::current()->is_Java_thread()) {
assert(SafepointSynchronize::is_at_safepoint() && Thread::current()->is_VM_thread(),
"must be either Java thread or VM thread in a safepoint");
return true;
}
StackWatermark* our_watermark = StackWatermarkSet::get(JavaThread::current(), StackWatermarkKind::gc);
if (our_watermark == nullptr) {
return true;
}
StackWatermark* their_watermark = StackWatermarkSet::get(jt, StackWatermarkKind::gc);
return our_watermark->linked_watermark() == their_watermark;
}
#endif // ASSERT