--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/unsafe/SunMiscUnsafeAccessTestObject.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2015, 2017, 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 8143628
+ * @summary Test unsafe access for Object
+ *
+ * @modules jdk.unsupported/sun.misc
+ * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.SunMiscUnsafeAccessTestObject
+ * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.SunMiscUnsafeAccessTestObject
+ * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.SunMiscUnsafeAccessTestObject
+ * @run testng/othervm -Diters=20000                         compiler.unsafe.SunMiscUnsafeAccessTestObject
+ */
+
+package compiler.unsafe;
+
+import org.testng.annotations.Test;
+
+import java.lang.reflect.Field;
+
+import static org.testng.Assert.*;
+
+public class SunMiscUnsafeAccessTestObject {
+    static final int ITERS = Integer.getInteger("iters", 1);
+    static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);
+
+    static final sun.misc.Unsafe UNSAFE;
+
+    static final long V_OFFSET;
+
+    static final Object STATIC_V_BASE;
+
+    static final long STATIC_V_OFFSET;
+
+    static int ARRAY_OFFSET;
+
+    static int ARRAY_SHIFT;
+
+    static {
+        try {
+            Field f = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
+            f.setAccessible(true);
+            UNSAFE = (sun.misc.Unsafe) f.get(null);
+        } catch (Exception e) {
+            throw new RuntimeException("Unable to get Unsafe instance.", e);
+        }
+
+        try {
+            Field staticVField = SunMiscUnsafeAccessTestObject.class.getDeclaredField("static_v");
+            STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);
+            STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+
+        try {
+            Field vField = SunMiscUnsafeAccessTestObject.class.getDeclaredField("v");
+            V_OFFSET = UNSAFE.objectFieldOffset(vField);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+
+        ARRAY_OFFSET = UNSAFE.arrayBaseOffset(Object[].class);
+        int ascale = UNSAFE.arrayIndexScale(Object[].class);
+        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
+    }
+
+    static Object static_v;
+
+    Object v;
+
+    @Test
+    public void testFieldInstance() {
+        SunMiscUnsafeAccessTestObject t = new SunMiscUnsafeAccessTestObject();
+        for (int c = 0; c < ITERS; c++) {
+            testAccess(t, V_OFFSET);
+        }
+    }
+
+    @Test
+    public void testFieldStatic() {
+        for (int c = 0; c < ITERS; c++) {
+            testAccess(STATIC_V_BASE, STATIC_V_OFFSET);
+        }
+    }
+
+    @Test
+    public void testArray() {
+        Object[] array = new Object[10];
+        for (int c = 0; c < ITERS; c++) {
+            for (int i = 0; i < array.length; i++) {
+                testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
+            }
+        }
+    }
+
+
+    static void testAccess(Object base, long offset) {
+        // Plain
+        {
+            UNSAFE.putObject(base, offset, "foo");
+            Object x = UNSAFE.getObject(base, offset);
+            assertEquals(x, "foo", "set Object value");
+        }
+
+        // Volatile
+        {
+            UNSAFE.putObjectVolatile(base, offset, "bar");
+            Object x = UNSAFE.getObjectVolatile(base, offset);
+            assertEquals(x, "bar", "putVolatile Object value");
+        }
+
+        // Lazy
+        {
+            UNSAFE.putOrderedObject(base, offset, "foo");
+            Object x = UNSAFE.getObjectVolatile(base, offset);
+            assertEquals(x, "foo", "putRelease Object value");
+        }
+
+
+
+        UNSAFE.putObject(base, offset, "foo");
+
+        // Compare
+        {
+            boolean r = UNSAFE.compareAndSwapObject(base, offset, "foo", "bar");
+            assertEquals(r, true, "success compareAndSwap Object");
+            Object x = UNSAFE.getObject(base, offset);
+            assertEquals(x, "bar", "success compareAndSwap Object value");
+        }
+
+        {
+            boolean r = UNSAFE.compareAndSwapObject(base, offset, "foo", "baz");
+            assertEquals(r, false, "failing compareAndSwap Object");
+            Object x = UNSAFE.getObject(base, offset);
+            assertEquals(x, "bar", "failing compareAndSwap Object value");
+        }
+
+        UNSAFE.putObject(base, offset, "bar");
+
+        // Compare set and get
+        {
+            Object o = UNSAFE.getAndSetObject(base, offset, "foo");
+            assertEquals(o, "bar", "getAndSet Object");
+            Object x = UNSAFE.getObject(base, offset);
+            assertEquals(x, "foo", "getAndSet Object value");
+        }
+
+    }
+
+}