Mercurial > hg > graal-compiler
view test/runtime/contended/DefaultValue.java @ 17576:2b2cc89121db
Merge
author | asaha |
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date | Thu, 20 Mar 2014 10:06:22 -0700 |
parents | 50e9396d5257 |
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/* * 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 8014509 * @summary \@Contended: explicit default value behaves differently from the implicit value * * @run main/othervm -XX:-RestrictContended DefaultValue */ public class DefaultValue { 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.getField(field1); Field f2 = klass.getField(field2); 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 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; if (!arePaddedPairwise(R1.class, "int1", "int2")) { System.err.println("R1 failed"); endResult &= false; } if (!arePaddedPairwise(R2.class, "int1", "int2")) { System.err.println("R2 failed"); endResult &= false; } if (!arePaddedPairwise(R3.class, "int1", "int2")) { System.err.println("R3 failed"); endResult &= false; } System.out.println(endResult ? "Test PASSES" : "Test FAILS"); if (!endResult) { throw new Error("Test failed"); } } public static class R1 { @Contended public int int1; @Contended public int int2; } public static class R2 { @Contended("") public int int1; @Contended("") public int int2; } public static class R3 { @Contended() public int int1; @Contended() public int int2; } }