hg: shenandoah/jdk10/hotspot: Cherry-pick upstream parallel safepoint cleanup (JDK-8180932 and JDK-8185102)

[roman at kennke.org]

Changeset: 3128dc3355b1
Author:    rkennke
Date:      2017-07-25 20:40 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/hotspot/rev/3128dc3355b1

Cherry-pick upstream parallel safepoint cleanup (JDK-8180932 and JDK-8185102)

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/NMethod.java
! src/share/vm/code/nmethod.hpp
! src/share/vm/gc/shared/collectedHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoah_globals.hpp
! src/share/vm/runtime/globals.hpp
! src/share/vm/runtime/safepoint.cpp
! src/share/vm/runtime/safepoint.hpp
! src/share/vm/runtime/sweeper.cpp
! src/share/vm/runtime/sweeper.hpp
! src/share/vm/runtime/synchronizer.cpp
! src/share/vm/runtime/synchronizer.hpp
! src/share/vm/runtime/thread.cpp
! src/share/vm/runtime/vmStructs.cpp
! test/runtime/logging/SafepointCleanupTest.java