hg: jdk/jdk: 8209850: Allow NamedThreads to use GlobalCounter critical sections

[kim.barrett at oracle.com]

Changeset: eb8d5aeabab3
Author:    kbarrett
Date:      2018-08-23 18:14 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/eb8d5aeabab3

8209850: Allow NamedThreads to use GlobalCounter critical sections
Summary: Add NamedThreads iterator and make GlobalCounter use it.
Reviewed-by: eosterlund, rehn

! src/hotspot/share/gc/shared/oopStorage.cpp
! src/hotspot/share/gc/shared/oopStorage.hpp
! 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/utilities/globalCounter.cpp
! src/hotspot/share/utilities/globalCounter.inline.hpp
+ src/hotspot/share/utilities/singleWriterSynchronizer.cpp
+ src/hotspot/share/utilities/singleWriterSynchronizer.hpp
+ test/hotspot/gtest/utilities/test_singleWriterSynchronizer.cpp