[aarch64-port-dev ] git: openjdk/aarch64-port: master: 8259862: MutableSpace's end should be atomic

[Kim Barrett]

Changeset: 1e0a1013
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2021-02-05 07:24:09 +0000
URL:       https://git.openjdk.java.net/aarch64-port/commit/1e0a1013

8259862: MutableSpace's end should be atomic

Make _end volatile and use atomic access

Reviewed-by: ayang, tschatzl

! src/hotspot/share/gc/parallel/mutableSpace.hpp
! src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp
! src/hotspot/share/gc/parallel/psYoungGen.hpp
! src/hotspot/share/gc/parallel/vmStructs_parallelgc.hpp