hg: shenandoah/jdk: ReferenceProcessor is_alive setup is racy

[ashipile at redhat.com]

Changeset: 2a2fe8eff7cc
Author:    shade
Date:      2018-02-26 12:09 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/2a2fe8eff7cc

ReferenceProcessor is_alive setup is racy

! src/hotspot/share/gc/shared/referenceProcessor.hpp
! src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp
! src/hotspot/share/gc/shenandoah/shenandoahAsserts.hpp
! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp