hg: jdk/sandbox: 8215097: Do not create NonJavaThreads before BarrierSet

[chris.hegarty at oracle.com]

Changeset: f0f3dc30e3bb
Author:    kbarrett
Date:      2018-12-11 18:00 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/f0f3dc30e3bb

8215097: Do not create NonJavaThreads before BarrierSet
Summary: G1 and CMS delay worker thread creation until BarrierSet exists.
Reviewed-by: dholmes, tschatzl

! src/hotspot/share/gc/cms/cmsHeap.cpp
! src/hotspot/share/gc/g1/g1CollectedHeap.cpp
! src/hotspot/share/gc/shared/barrierSet.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp