hg: shenandoah/jdk8u/hotspot: When coming from a Java thread (e.g. JNI critical notification), lock/unlock pending list directly. Solves deadlock.

[roman at kennke.org]

Changeset: 92d0c4de9788
Author:    rkennke
Date:      2016-07-15 13:07 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/92d0c4de9788

When coming from a Java thread (e.g. JNI critical notification), lock/unlock pending list directly. Solves deadlock.

! src/share/vm/gc_implementation/shenandoah/vm_operations_shenandoah.cpp
! src/share/vm/gc_implementation/shenandoah/vm_operations_shenandoah.hpp