hg: jdk/sandbox: 8214972: Uses of klass_holder() except GC need to apply GC barriers

[chris.hegarty at oracle.com]

Changeset: 7cc17c043ce0
Author:    coleenp
Date:      2018-12-07 14:48 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/7cc17c043ce0

8214972: Uses of klass_holder() except GC need to apply GC barriers
Summary: Fix klass_holder() and make all callers use it, remove holder_phantom().
Reviewed-by: eosterlund, dlong

! src/hotspot/share/ci/ciInstanceKlass.cpp
! src/hotspot/share/classfile/classLoaderData.hpp
! src/hotspot/share/gc/g1/g1FullGCMarker.inline.hpp
! src/hotspot/share/gc/parallel/psCompactionManager.inline.hpp
! src/hotspot/share/gc/serial/markSweep.inline.hpp
! src/hotspot/share/jvmci/jvmciCompilerToVM.cpp
! src/hotspot/share/oops/instanceKlass.hpp
! src/hotspot/share/oops/klass.cpp
! src/hotspot/share/oops/klass.hpp