hg: jdk9/hs/hotspot: 8171971: Fix timing bug in JVM management of package export lists

[harold.seigel at oracle.com]

Changeset: 76bc5f4eef8b
Author:    hseigel
Date:      2017-01-20 16:09 -0500
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/76bc5f4eef8b

8171971: Fix timing bug in JVM management of package export lists
Summary: Reduce the number of fields that maintain export state and use Module_lock to access these fields
Reviewed-by: acorn, sspitsyn, lfoltan

! src/share/vm/classfile/modules.cpp
! src/share/vm/classfile/packageEntry.cpp
! src/share/vm/classfile/packageEntry.hpp
! src/share/vm/runtime/reflection.cpp