hg: jdk/jdk: 8212827: GlobalCounter should support nested critical sections

[kim.barrett at oracle.com]

Changeset: d2a3503c72f7
Author:    kbarrett
Date:      2018-10-30 18:06 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/d2a3503c72f7

8212827: GlobalCounter should support nested critical sections
Summary: Support nested critical sections.
Reviewed-by: eosterlund, rehn, tschatzl

! src/hotspot/share/utilities/concurrentHashTable.hpp
! src/hotspot/share/utilities/concurrentHashTable.inline.hpp
! src/hotspot/share/utilities/globalCounter.cpp
! src/hotspot/share/utilities/globalCounter.hpp
! src/hotspot/share/utilities/globalCounter.inline.hpp
! src/hotspot/share/utilities/singleWriterSynchronizer.hpp
! test/hotspot/gtest/utilities/test_globalCounter.cpp
+ test/hotspot/gtest/utilities/test_globalCounter_nested.cpp