hg: jdk/sandbox: 8250589: Move Universe::_reference_pending_list into OopHandle

[chris.hegarty at oracle.com]

Changeset: 89fe9e02a522
Author:    coleenp
Date:      2020-07-28 08:10 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/89fe9e02a522

8250589: Move Universe::_reference_pending_list into OopHandle
Summary: Use synchronization to reference the _reference_pending_list with OopHandle
Reviewed-by: shade, kbarrett, dholmes, eosterlund

! src/hotspot/share/memory/universe.cpp
! src/hotspot/share/memory/universe.hpp
! src/hotspot/share/oops/oopHandle.hpp
! src/hotspot/share/oops/oopHandle.inline.hpp