diff -r 8ada1018118c -r 8e959392c068 hotspot/test/runtime/8003985/Test8003985.java --- a/hotspot/test/runtime/8003985/Test8003985.java Thu May 23 10:47:37 2013 -0700 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,302 +0,0 @@ -/* - * 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; - } - -} -