1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/runtime/contended/Basic.java Mon May 20 15:43:50 2013 +0400
1.3 @@ -0,0 +1,302 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +import java.io.BufferedReader;
1.28 +import java.io.InputStreamReader;
1.29 +import java.lang.Class;
1.30 +import java.lang.String;
1.31 +import java.lang.System;
1.32 +import java.lang.management.ManagementFactory;
1.33 +import java.lang.management.RuntimeMXBean;
1.34 +import java.util.ArrayList;
1.35 +import java.util.List;
1.36 +import java.util.concurrent.CyclicBarrier;
1.37 +import java.util.regex.Matcher;
1.38 +import java.util.regex.Pattern;
1.39 +import java.lang.reflect.Field;
1.40 +import java.lang.reflect.Modifier;
1.41 +import sun.misc.Unsafe;
1.42 +import sun.misc.Contended;
1.43 +
1.44 +/*
1.45 + * @test
1.46 + * @bug 8003985
1.47 + * @summary Support Contended Annotation - JEP 142
1.48 + *
1.49 + * @run main/othervm -XX:-RestrictContended Basic
1.50 + */
1.51 +public class Basic {
1.52 +
1.53 + private static final Unsafe U;
1.54 + private static int ADDRESS_SIZE;
1.55 + private static int HEADER_SIZE;
1.56 +
1.57 + static {
1.58 + // steal Unsafe
1.59 + try {
1.60 + Field unsafe = Unsafe.class.getDeclaredField("theUnsafe");
1.61 + unsafe.setAccessible(true);
1.62 + U = (Unsafe) unsafe.get(null);
1.63 + } catch (NoSuchFieldException | IllegalAccessException e) {
1.64 + throw new IllegalStateException(e);
1.65 + }
1.66 +
1.67 + // When running with CompressedOops on 64-bit platform, the address size
1.68 + // reported by Unsafe is still 8, while the real reference fields are 4 bytes long.
1.69 + // Try to guess the reference field size with this naive trick.
1.70 + try {
1.71 + long off1 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj1"));
1.72 + long off2 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj2"));
1.73 + ADDRESS_SIZE = (int) Math.abs(off2 - off1);
1.74 + HEADER_SIZE = (int) Math.min(off1, off2);
1.75 + } catch (NoSuchFieldException e) {
1.76 + ADDRESS_SIZE = -1;
1.77 + }
1.78 + }
1.79 +
1.80 + static class CompressedOopsClass {
1.81 + public Object obj1;
1.82 + public Object obj2;
1.83 + }
1.84 +
1.85 + public static boolean arePaddedPairwise(Class klass, String field1, String field2) throws Exception {
1.86 + Field f1 = klass.getDeclaredField(field1);
1.87 + Field f2 = klass.getDeclaredField(field2);
1.88 +
1.89 + if (isStatic(f1) != isStatic(f2)) {
1.90 + return true; // these guys are in naturally disjoint locations
1.91 + }
1.92 +
1.93 + int diff = offset(f1) - offset(f2);
1.94 + if (diff < 0) {
1.95 + // f1 is first
1.96 + return (offset(f2) - (offset(f1) + getSize(f1))) > 64;
1.97 + } else {
1.98 + // f2 is first
1.99 + return (offset(f1) - (offset(f2) + getSize(f2))) > 64;
1.100 + }
1.101 + }
1.102 +
1.103 + public static boolean isPadded(Class klass, String field1) throws Exception {
1.104 + Field f1 = klass.getDeclaredField(field1);
1.105 +
1.106 + if (isStatic(f1)) {
1.107 + return offset(f1) > 128 + 64;
1.108 + }
1.109 +
1.110 + return offset(f1) > 64;
1.111 + }
1.112 +
1.113 + public static boolean sameLayout(Class klass1, Class klass2) throws Exception {
1.114 + for (Field f1 : klass1.getDeclaredFields()) {
1.115 + Field f2 = klass2.getDeclaredField(f1.getName());
1.116 + if (offset(f1) != offset(f2)) {
1.117 + return false;
1.118 + }
1.119 + }
1.120 +
1.121 + for (Field f2 : klass1.getDeclaredFields()) {
1.122 + Field f1 = klass2.getDeclaredField(f2.getName());
1.123 + if (offset(f1) != offset(f2)) {
1.124 + return false;
1.125 + }
1.126 + }
1.127 +
1.128 + return true;
1.129 + }
1.130 +
1.131 + public static boolean isStatic(Field field) {
1.132 + return Modifier.isStatic(field.getModifiers());
1.133 + }
1.134 +
1.135 + public static int offset(Field field) {
1.136 + if (isStatic(field)) {
1.137 + return (int) U.staticFieldOffset(field);
1.138 + } else {
1.139 + return (int) U.objectFieldOffset(field);
1.140 + }
1.141 + }
1.142 +
1.143 + public static int getSize(Field field) {
1.144 + Class type = field.getType();
1.145 + if (type == byte.class) { return 1; }
1.146 + if (type == boolean.class) { return 1; }
1.147 + if (type == short.class) { return 2; }
1.148 + if (type == char.class) { return 2; }
1.149 + if (type == int.class) { return 4; }
1.150 + if (type == float.class) { return 4; }
1.151 + if (type == long.class) { return 8; }
1.152 + if (type == double.class) { return 8; }
1.153 + return ADDRESS_SIZE;
1.154 + }
1.155 +
1.156 + public static void main(String[] args) throws Exception {
1.157 + boolean endResult = true;
1.158 +
1.159 + // --------------- INSTANCE FIELDS ---------------------
1.160 +
1.161 + if (arePaddedPairwise(Test1.class, "int1", "int2") ||
1.162 + isPadded(Test1.class, "int1") ||
1.163 + isPadded(Test1.class, "int2")) {
1.164 + System.err.println("Test1 failed");
1.165 + endResult &= false;
1.166 + }
1.167 +
1.168 + if (!arePaddedPairwise(Test2.class, "int1", "int2") ||
1.169 + !isPadded(Test2.class, "int1") ||
1.170 + isPadded(Test2.class, "int2")) {
1.171 + System.err.println("Test2 failed");
1.172 + endResult &= false;
1.173 + }
1.174 +
1.175 + if (!arePaddedPairwise(Test3.class, "int1", "int2") ||
1.176 + !isPadded(Test3.class, "int1") ||
1.177 + !isPadded(Test3.class, "int2")) {
1.178 + System.err.println("Test3 failed");
1.179 + endResult &= false;
1.180 + }
1.181 +
1.182 + if (arePaddedPairwise(Test4.class, "int1", "int2") ||
1.183 + !isPadded(Test4.class, "int1") ||
1.184 + !isPadded(Test4.class, "int2")) {
1.185 + System.err.println("Test4 failed");
1.186 + endResult &= false;
1.187 + }
1.188 +
1.189 + if (!arePaddedPairwise(Test5.class, "int1", "int2") ||
1.190 + !isPadded(Test5.class, "int1") ||
1.191 + !isPadded(Test5.class, "int2")) {
1.192 + System.err.println("Test5 failed");
1.193 + endResult &= false;
1.194 + }
1.195 +
1.196 + if (!arePaddedPairwise(Test6.class, "int1", "int2") ||
1.197 + !isPadded(Test6.class, "int1") ||
1.198 + !isPadded(Test6.class, "int2")) {
1.199 + System.err.println("Test6 failed");
1.200 + endResult &= false;
1.201 + }
1.202 +
1.203 + if (arePaddedPairwise(Test7.class, "int1", "int2") ||
1.204 + !isPadded(Test7.class, "int1") ||
1.205 + !isPadded(Test7.class, "int2")) {
1.206 + System.err.println("Test7 failed");
1.207 + endResult &= false;
1.208 + }
1.209 +
1.210 + if (!arePaddedPairwise(Test8.class, "int1", "int2") ||
1.211 + !isPadded(Test8.class, "int1") ||
1.212 + !isPadded(Test8.class, "int2")) {
1.213 + System.err.println("Test8 failed");
1.214 + endResult &= false;
1.215 + }
1.216 +
1.217 + if (!arePaddedPairwise(Test9.class, "int1", "int2") ||
1.218 + !isPadded(Test9.class, "int1") ||
1.219 + !isPadded(Test9.class, "int2")) {
1.220 + System.err.println("Test9 failed");
1.221 + endResult &= false;
1.222 + }
1.223 +
1.224 + if (!sameLayout(Test4.class, Test7.class)) {
1.225 + System.err.println("Test4 and Test7 have different layouts");
1.226 + endResult &= false;
1.227 + }
1.228 +
1.229 + if (!sameLayout(Test5.class, Test6.class)) {
1.230 + System.err.println("Test5 and Test6 have different layouts");
1.231 + endResult &= false;
1.232 + }
1.233 +
1.234 + if (!sameLayout(Test8.class, Test9.class)) {
1.235 + System.err.println("Test8 and Test9 have different layouts");
1.236 + endResult &= false;
1.237 + }
1.238 +
1.239 + System.out.println(endResult ? "Test PASSES" : "Test FAILS");
1.240 + if (!endResult) {
1.241 + throw new Error("Test failed");
1.242 + }
1.243 + }
1.244 +
1.245 + // ----------------------------------- INSTANCE FIELDS -----------------------------------------
1.246 +
1.247 + // naturally packed
1.248 + public static class Test1 {
1.249 + private int int1;
1.250 + private int int2;
1.251 + }
1.252 +
1.253 + // int1 is padded
1.254 + public static class Test2 {
1.255 + @Contended private int int1;
1.256 + private int int2;
1.257 + }
1.258 +
1.259 + // both fields are padded
1.260 + public static class Test3 {
1.261 + @Contended private int int1;
1.262 + @Contended private int int2;
1.263 + }
1.264 +
1.265 + // fields are padded in the singular group
1.266 + public static class Test4 {
1.267 + @Contended("sameGroup") private int int1;
1.268 + @Contended("sameGroup") private int int2;
1.269 + }
1.270 +
1.271 + // fields are padded in disjoint groups
1.272 + public static class Test5 {
1.273 + @Contended("diffGroup1") private int int1;
1.274 + @Contended("diffGroup2") private int int2;
1.275 + }
1.276 +
1.277 + // fields are padded in disjoint groups
1.278 + public static class Test6 {
1.279 + @Contended private int int1;
1.280 + @Contended("diffGroup2") private int int2;
1.281 + }
1.282 +
1.283 + // fields are padded in the singular group
1.284 + @Contended
1.285 + public static class Test7 {
1.286 + private int int1;
1.287 + private int int2;
1.288 + }
1.289 +
1.290 + // all fields are padded as the group, and one field is padded specifically
1.291 + @Contended
1.292 + public static class Test8 {
1.293 + @Contended private int int1;
1.294 + private int int2;
1.295 + }
1.296 +
1.297 + // all fields are padded as the group, and one field is padded specifically
1.298 + @Contended
1.299 + public static class Test9 {
1.300 + @Contended("group") private int int1;
1.301 + private int int2;
1.302 + }
1.303 +
1.304 +}
1.305 +
