242 lines
7.0 KiB
Java
242 lines
7.0 KiB
Java
/*
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* Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.lang.Class;
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import java.lang.String;
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import java.lang.System;
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import java.lang.management.ManagementFactory;
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import java.lang.management.RuntimeMXBean;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.CyclicBarrier;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import jdk.internal.misc.Unsafe;
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import jdk.internal.vm.annotation.Contended;
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/*
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* @test
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* @bug 8012939
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* @summary \@Contended doesn't work correctly with inheritance
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*
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* @modules java.base/jdk.internal.misc
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* @modules java.base/jdk.internal.vm.annotation
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* @run main/othervm -XX:-RestrictContended Inheritance1
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*/
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public class Inheritance1 {
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private static final Unsafe U = Unsafe.getUnsafe();
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private static int ADDRESS_SIZE;
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private static int HEADER_SIZE;
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static {
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// When running with CompressedOops on 64-bit platform, the address size
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// reported by Unsafe is still 8, while the real reference fields are 4 bytes long.
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// Try to guess the reference field size with this naive trick.
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try {
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long off1 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj1"));
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long off2 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj2"));
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ADDRESS_SIZE = (int) Math.abs(off2 - off1);
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HEADER_SIZE = (int) Math.min(off1, off2);
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} catch (NoSuchFieldException e) {
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ADDRESS_SIZE = -1;
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}
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}
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static class CompressedOopsClass {
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public Object obj1;
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public Object obj2;
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}
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public static boolean arePaddedPairwise(Class klass, String field1, String field2) throws Exception {
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Field f1 = klass.getField(field1);
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Field f2 = klass.getField(field2);
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int diff = offset(f1) - offset(f2);
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if (diff < 0) {
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// f1 is first
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return (offset(f2) - (offset(f1) + getSize(f1))) > 64;
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} else {
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// f2 is first
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return (offset(f1) - (offset(f2) + getSize(f2))) > 64;
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}
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}
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public static boolean sameLayout(Class klass1, Class klass2) throws Exception {
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for (Field f1 : klass1.getDeclaredFields()) {
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Field f2 = klass2.getDeclaredField(f1.getName());
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if (offset(f1) != offset(f2)) {
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return false;
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}
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}
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for (Field f2 : klass1.getDeclaredFields()) {
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Field f1 = klass2.getDeclaredField(f2.getName());
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if (offset(f1) != offset(f2)) {
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return false;
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}
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}
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return true;
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}
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public static boolean isStatic(Field field) {
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return Modifier.isStatic(field.getModifiers());
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}
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public static int offset(Field field) {
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if (isStatic(field)) {
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return (int) U.staticFieldOffset(field);
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} else {
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return (int) U.objectFieldOffset(field);
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}
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}
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public static int getSize(Field field) {
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Class type = field.getType();
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if (type == byte.class) { return 1; }
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if (type == boolean.class) { return 1; }
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if (type == short.class) { return 2; }
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if (type == char.class) { return 2; }
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if (type == int.class) { return 4; }
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if (type == float.class) { return 4; }
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if (type == long.class) { return 8; }
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if (type == double.class) { return 8; }
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return ADDRESS_SIZE;
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}
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public static void main(String[] args) throws Exception {
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boolean endResult = true;
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// --------------- INSTANCE FIELDS ---------------------
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if (!arePaddedPairwise(A2_R1.class, "int1", "int2")) {
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System.err.println("A2_R1 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A3_R1.class, "int1", "int2")) {
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System.err.println("A3_R1 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A1_R2.class, "int1", "int2")) {
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System.err.println("A1_R2 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A2_R2.class, "int1", "int2")) {
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System.err.println("A2_R2 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A3_R2.class, "int1", "int2")) {
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System.err.println("A3_R2 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A1_R3.class, "int1", "int2")) {
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System.err.println("A1_R3 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A2_R3.class, "int1", "int2")) {
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System.err.println("A2_R3 failed");
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endResult &= false;
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}
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if (!arePaddedPairwise(A3_R3.class, "int1", "int2")) {
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System.err.println("A3_R3 failed");
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endResult &= false;
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}
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System.out.println(endResult ? "Test PASSES" : "Test FAILS");
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if (!endResult) {
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throw new Error("Test failed");
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}
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}
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public static class R1 {
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public int int1;
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}
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public static class R2 {
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@Contended
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public int int1;
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}
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@Contended
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public static class R3 {
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public int int1;
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}
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public static class A1_R1 extends R1 {
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public int int2;
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}
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public static class A2_R1 extends R1 {
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@Contended
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public int int2;
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}
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@Contended
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public static class A3_R1 extends R1 {
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public int int2;
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}
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public static class A1_R2 extends R2 {
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public int int2;
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}
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public static class A2_R2 extends R2 {
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@Contended
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public int int2;
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}
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@Contended
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public static class A3_R2 extends R2 {
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public int int2;
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}
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public static class A1_R3 extends R3 {
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public int int2;
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}
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public static class A2_R3 extends R3 {
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@Contended
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public int int2;
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}
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@Contended
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public static class A3_R3 extends R3 {
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public int int2;
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}
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}
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