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8254164: G1 only removes self forwarding pointers for last collection set increment

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Reviewed-by: sjohanss, kbarrett
This commit is contained in:
Thomas Schatzl 2020-10-12 07:55:01 +00:00
parent bf46acf933
commit 59378a19b2
1 changed files with 7 additions and 2 deletions

9
src/hotspot/share/gc/g1/g1EvacFailure.cpp

@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -259,5 +259,10 @@ G1ParRemoveSelfForwardPtrsTask::G1ParRemoveSelfForwardPtrsTask(G1RedirtyCardsQue
void G1ParRemoveSelfForwardPtrsTask::work(uint worker_id) {
RemoveSelfForwardPtrHRClosure rsfp_cl(_rdcqs, worker_id);
_g1h->collection_set_iterate_increment_from(&rsfp_cl, &_hrclaimer, worker_id);
// We need to check all collection set regions whether they need self forward
// removals, not only the last collection set increment. The reason is that
// reference processing (e.g. finalizers) can make it necessary to resurrect an
// otherwise unreachable object at the very end of the collection. That object
// might cause an evacuation failure in any region in the collection set.
_g1h->collection_set_par_iterate_all(&rsfp_cl, &_hrclaimer, worker_id);
}