diff -r c63bdf53a1a7 -r 44839fbb20db test/hotspot/jtreg/vmTestbase/nsk/share/gc/lock/jniref/JNIRefLocker.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/share/gc/lock/jniref/JNIRefLocker.java	Mon Apr 30 18:10:24 2018 -0700
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package nsk.share.gc.lock.jniref;
+
+import nsk.share.gc.lock.CriticalSectionObjectLocker;
+import nsk.share.TestFailure;
+
+/**
+ * JNIRefLocker locks objects using JNI functions
+ * NewGlobalRef, NewLocalRef, NewWeakGlobalRef
+ */
+public class JNIRefLocker extends CriticalSectionObjectLocker {
+        private native void criticalNative(long enterTime, long sleepTime);
+
+        static {
+                System.loadLibrary("JNIRefLocker");
+        }
+
+        public JNIRefLocker(Object obj) {
+                super(obj);
+        }
+
+        protected void criticalSection(long enterTime, long sleepTime) {
+                criticalNative(enterTime, sleepTime);
+        }
+}