--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/8003985/Test8003985.java	Mon Mar 11 14:00:09 2013 -0400
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.lang.Class;
+import java.lang.String;
+import java.lang.System;
+import java.lang.management.ManagementFactory;
+import java.lang.management.RuntimeMXBean;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CyclicBarrier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import sun.misc.Unsafe;
+import sun.misc.Contended;
+
+/*
+ * @test
+ * @bug     8003985
+ * @summary Support Contended Annotation - JEP 142
+ *
+ * @run main/othervm -XX:-RestrictContended Test8003985
+ */
+public class Test8003985 {
+
+    private static final Unsafe U;
+    private static int ADDRESS_SIZE;
+    private static int HEADER_SIZE;
+
+    static {
+        // steal Unsafe
+        try {
+            Field unsafe = Unsafe.class.getDeclaredField("theUnsafe");
+            unsafe.setAccessible(true);
+            U = (Unsafe) unsafe.get(null);
+        } catch (NoSuchFieldException | IllegalAccessException e) {
+            throw new IllegalStateException(e);
+        }
+
+        // When running with CompressedOops on 64-bit platform, the address size
+        // reported by Unsafe is still 8, while the real reference fields are 4 bytes long.
+        // Try to guess the reference field size with this naive trick.
+        try {
+            long off1 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj1"));
+            long off2 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj2"));
+            ADDRESS_SIZE = (int) Math.abs(off2 - off1);
+            HEADER_SIZE = (int) Math.min(off1, off2);
+        } catch (NoSuchFieldException e) {
+            ADDRESS_SIZE = -1;
+        }
+    }
+
+    static class CompressedOopsClass {
+        public Object obj1;
+        public Object obj2;
+    }
+
+    public static boolean arePaddedPairwise(Class klass, String field1, String field2) throws Exception {
+        Field f1 = klass.getDeclaredField(field1);
+        Field f2 = klass.getDeclaredField(field2);
+
+        if (isStatic(f1) != isStatic(f2)) {
+            return true; // these guys are in naturally disjoint locations
+        }
+
+        int diff = offset(f1) - offset(f2);
+        if (diff < 0) {
+            // f1 is first
+            return (offset(f2) - (offset(f1) + getSize(f1))) > 64;
+        } else {
+            // f2 is first
+            return (offset(f1) - (offset(f2) + getSize(f2))) > 64;
+        }
+    }
+
+    public static boolean isPadded(Class klass, String field1) throws Exception {
+        Field f1 = klass.getDeclaredField(field1);
+
+        if (isStatic(f1)) {
+            return offset(f1) > 128 + 64;
+        }
+
+        return offset(f1) > 64;
+    }
+
+    public static boolean sameLayout(Class klass1, Class klass2) throws Exception {
+        for (Field f1 : klass1.getDeclaredFields()) {
+            Field f2 = klass2.getDeclaredField(f1.getName());
+            if (offset(f1) != offset(f2)) {
+                return false;
+            }
+        }
+
+        for (Field f2 : klass1.getDeclaredFields()) {
+            Field f1 = klass2.getDeclaredField(f2.getName());
+            if (offset(f1) != offset(f2)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public static boolean isStatic(Field field) {
+        return Modifier.isStatic(field.getModifiers());
+    }
+
+    public static int offset(Field field) {
+        if (isStatic(field)) {
+            return (int) U.staticFieldOffset(field);
+        } else {
+            return (int) U.objectFieldOffset(field);
+        }
+    }
+
+    public static int getSize(Field field) {
+        Class type = field.getType();
+        if (type == byte.class)    { return 1; }
+        if (type == boolean.class) { return 1; }
+        if (type == short.class)   { return 2; }
+        if (type == char.class)    { return 2; }
+        if (type == int.class)     { return 4; }
+        if (type == float.class)   { return 4; }
+        if (type == long.class)    { return 8; }
+        if (type == double.class)  { return 8; }
+        return ADDRESS_SIZE;
+    }
+
+    public static void main(String[] args) throws Exception {
+        boolean endResult = true;
+
+        // --------------- INSTANCE FIELDS ---------------------
+
+        if (arePaddedPairwise(Test1.class, "int1", "int2") ||
+                isPadded(Test1.class, "int1") ||
+                isPadded(Test1.class, "int2")) {
+            System.err.println("Test1 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test2.class, "int1", "int2") ||
+                !isPadded(Test2.class, "int1") ||
+                isPadded(Test2.class, "int2")) {
+            System.err.println("Test2 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test3.class, "int1", "int2") ||
+                !isPadded(Test3.class, "int1") ||
+                !isPadded(Test3.class, "int2")) {
+            System.err.println("Test3 failed");
+            endResult &= false;
+        }
+
+        if (arePaddedPairwise(Test4.class, "int1", "int2") ||
+                !isPadded(Test4.class, "int1") ||
+                !isPadded(Test4.class, "int2")) {
+            System.err.println("Test4 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test5.class, "int1", "int2") ||
+                !isPadded(Test5.class, "int1") ||
+                !isPadded(Test5.class, "int2")) {
+            System.err.println("Test5 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test6.class, "int1", "int2") ||
+                !isPadded(Test6.class, "int1") ||
+                !isPadded(Test6.class, "int2")) {
+            System.err.println("Test6 failed");
+            endResult &= false;
+        }
+
+        if (arePaddedPairwise(Test7.class, "int1", "int2") ||
+                !isPadded(Test7.class, "int1") ||
+                !isPadded(Test7.class, "int2")) {
+            System.err.println("Test7 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test8.class, "int1", "int2") ||
+                !isPadded(Test8.class, "int1") ||
+                !isPadded(Test8.class, "int2")) {
+            System.err.println("Test8 failed");
+            endResult &= false;
+        }
+
+        if (!arePaddedPairwise(Test9.class, "int1", "int2") ||
+                !isPadded(Test9.class, "int1") ||
+                !isPadded(Test9.class, "int2")) {
+            System.err.println("Test9 failed");
+            endResult &= false;
+        }
+
+        if (!sameLayout(Test4.class, Test7.class)) {
+            System.err.println("Test4 and Test7 have different layouts");
+            endResult &= false;
+        }
+
+        if (!sameLayout(Test5.class, Test6.class)) {
+            System.err.println("Test5 and Test6 have different layouts");
+            endResult &= false;
+        }
+
+        if (!sameLayout(Test8.class, Test9.class)) {
+            System.err.println("Test8 and Test9 have different layouts");
+            endResult &= false;
+        }
+
+        System.out.println(endResult ? "Test PASSES" : "Test FAILS");
+        if (!endResult) {
+           throw new Error("Test failed");
+        }
+    }
+
+    // ----------------------------------- INSTANCE FIELDS -----------------------------------------
+
+    // naturally packed
+    public static class Test1 {
+                                 private int int1;
+                                 private int int2;
+    }
+
+    // int1 is padded
+    public static class Test2 {
+        @Contended               private int int1;
+                                 private int int2;
+    }
+
+    // both fields are padded
+    public static class Test3 {
+        @Contended               private int int1;
+        @Contended               private int int2;
+    }
+
+    // fields are padded in the singular group
+    public static class Test4 {
+        @Contended("sameGroup")  private int int1;
+        @Contended("sameGroup")  private int int2;
+    }
+
+    // fields are padded in disjoint groups
+    public static class Test5 {
+        @Contended("diffGroup1") private int int1;
+        @Contended("diffGroup2") private int int2;
+    }
+
+    // fields are padded in disjoint groups
+    public static class Test6 {
+        @Contended               private int int1;
+        @Contended("diffGroup2") private int int2;
+    }
+
+    // fields are padded in the singular group
+    @Contended
+    public static class Test7 {
+                                 private int int1;
+                                 private int int2;
+    }
+
+    // all fields are padded as the group, and one field is padded specifically
+    @Contended
+    public static class Test8 {
+        @Contended               private int int1;
+                                 private int int2;
+    }
+
+    // all fields are padded as the group, and one field is padded specifically
+    @Contended
+    public static class Test9 {
+        @Contended("group")      private int int1;
+                                 private int int2;
+    }
+
+}
+