hg: jdk/jdk: 8209976: Improve iteration over non-JavaThreads

[kim.barrett at oracle.com]

Changeset: 35a6956f4243
Author:    kbarrett
Date:      2018-08-28 16:04 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/35a6956f4243

8209976: Improve iteration over non-JavaThreads
Summary: Add NonJavaThread and move NamedThread iteration to new class.
Reviewed-by: eosterlund, coleenp, rkennke

! src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/hotspot/share/utilities/globalCounter.cpp
! src/hotspot/share/utilities/globalCounter.inline.hpp