hg: jdk/jdk: 8207778: Add locking to ModuleEntry and PackageEntry tables

[harold.seigel at oracle.com]

Changeset: b812a85b3aa4
Author:    hseigel
Date:      2018-08-10 09:30 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/b812a85b3aa4

8207778: Add locking to ModuleEntry and PackageEntry tables
Summary: Restructure ClassLoaderDataGraph code to simplify using locks in SystemDictionary::do_unloading()
Reviewed-by: lfoltan, coleenp

! src/hotspot/share/classfile/classLoaderData.cpp
! src/hotspot/share/classfile/classLoaderData.hpp
! src/hotspot/share/classfile/loaderConstraints.cpp
! src/hotspot/share/classfile/moduleEntry.cpp
! src/hotspot/share/classfile/packageEntry.cpp
! src/hotspot/share/classfile/resolutionErrors.cpp
! src/hotspot/share/classfile/systemDictionary.cpp