hg: jdk/sandbox: 8225483: Shenandoah: Enhance native access barrier

[chris.hegarty at oracle.com]

Changeset: 7b671e6b0d5b
Author:    zgu
Date:      2019-07-15 11:23 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/7b671e6b0d5b

8225483: Shenandoah: Enhance native access barrier
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.hpp
! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp