hg: jdk/jdk: 8213209: [REDO] Allow Klass::_subklass and _next_sibling to have unloaded classes

[erik.osterlund at oracle.com]

Changeset: 621efe32eb0b
Author:    eosterlund
Date:      2018-11-30 15:29 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/621efe32eb0b

8213209: [REDO] Allow Klass::_subklass and _next_sibling to have unloaded classes
Reviewed-by: coleenp, dlong

! src/hotspot/share/ci/ciInstanceKlass.cpp
! src/hotspot/share/ci/ciInstanceKlass.hpp
! src/hotspot/share/memory/universe.cpp
! src/hotspot/share/memory/universe.hpp
! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/oops/instanceKlass.hpp
! src/hotspot/share/oops/klass.cpp
! src/hotspot/share/oops/klass.hpp
! src/hotspot/share/runtime/vmStructs.cpp
+ test/hotspot/jtreg/runtime/ClassUnload/UnloadInterfaceTest.java
+ test/hotspot/jtreg/runtime/ClassUnload/test/ImplementorClass.java
+ test/hotspot/jtreg/runtime/ClassUnload/test/Interface.java
! test/hotspot/jtreg/runtime/testlibrary/ClassUnloadCommon.java