hg: jdk/submit: 8225255: Make SATB qset lock-free

[kim.barrett at oracle.com]

Changeset: e64383344f14
Author:    kbarrett
Date:      2019-06-26 13:18 -0400
URL:       http://hg.openjdk.java.net/jdk/submit/rev/e64383344f14

8225255: Make SATB qset lock-free
Summary: Refactor PtrQueueSet, use lock-free stack for SATB completed buffers
Reviewed-by: tschatzl, shade

! src/hotspot/share/gc/g1/g1CollectedHeap.cpp
! src/hotspot/share/gc/g1/g1ConcurrentMark.cpp
! src/hotspot/share/gc/g1/g1DirtyCardQueue.cpp
! src/hotspot/share/gc/g1/g1DirtyCardQueue.hpp
! src/hotspot/share/gc/g1/g1SATBMarkQueueSet.cpp
! src/hotspot/share/gc/g1/g1SATBMarkQueueSet.hpp
! src/hotspot/share/gc/shared/ptrQueue.cpp
! src/hotspot/share/gc/shared/ptrQueue.hpp
! src/hotspot/share/gc/shared/satbMarkQueue.cpp
! src/hotspot/share/gc/shared/satbMarkQueue.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahSATBMarkQueueSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahSATBMarkQueueSet.hpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp