--- /dev/null	2016-12-10 17:08:26.000000000 +0000
+++ new/test/sun/misc/DeallocateBuffer.java	2016-12-10 17:08:26.000000000 +0000
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2016, 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.
+ */
+
+/* @test
+ * @bug 8765432
+ * @summary Basic test for Unsafe::deallocate
+ * @modules jdk.unsupported
+ * @run testng DeallocateBuffer
+ */
+
+import java.lang.reflect.Field;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import sun.misc.Unsafe;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+import org.testng.annotations.DataProvider;
+import static java.nio.file.StandardOpenOption.CREATE;
+import static java.nio.file.StandardOpenOption.WRITE;
+
+public class DeallocateBuffer {
+
+    static Unsafe UNSAFE;
+
+    @BeforeClass
+    static void init() throws Exception {
+        UNSAFE = getUnsafe();
+    }
+
+    @DataProvider(name = "non-direct")
+    static Object[][] nonDirectBuffers() {
+        return new Object[][] {
+                { ByteBuffer.allocate(10) },
+                { ByteBuffer.allocate(10).duplicate() },
+                { ByteBuffer.allocate(10).slice() }
+        };
+    }
+
+    @Test(dataProvider="non-direct",
+          expectedExceptions = IllegalArgumentException.class)
+    public void nonDirect(ByteBuffer buffer) throws Exception {
+        UNSAFE.deallocate(buffer);
+    }
+
+    @DataProvider(name = "direct")
+    static Object[][] directBuffers() throws Exception {
+        byte[] srcData = new byte[20];
+        for (int i=0; i<20; i++)
+            srcData[i] = (byte)i;
+        Path bob = Paths.get("bob");
+        try (FileChannel fc = FileChannel.open(Paths.get("bob"), CREATE, WRITE)) {
+            fc.write(ByteBuffer.wrap(srcData));
+        }
+        FileChannel fc = FileChannel.open(bob);
+        MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 10);
+        mbb.load();
+
+        return new Object[][] {
+                { ByteBuffer.allocateDirect(10) },
+                { ByteBuffer.allocateDirect(10).duplicate() },
+                { ByteBuffer.allocateDirect(10).slice() },
+                { mbb },
+                { mbb.duplicate() },
+                { mbb.slice() },
+                { fc.map(FileChannel.MapMode.READ_ONLY, 1, 11) }
+        };
+    }
+
+    @Test(dataProvider="direct")
+    public void direct(ByteBuffer buffer) throws Exception {
+        UNSAFE.deallocate(buffer);
+    }
+
+    @Test(expectedExceptions = NullPointerException.class)
+    public void npe() throws Exception {
+        UNSAFE.deallocate(null);
+    }
+
+    static Unsafe getUnsafe() throws ReflectiveOperationException {
+        Field f = Unsafe.class.getDeclaredField("theUnsafe");
+        f.setAccessible(true);
+        return (Unsafe)f.get(null);
+    }
+}