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annotate test/compiler/jsr292/ConcurrentClassLoadingTest.java @ 17524:89152779163c

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Merge with jdk8-b132
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 15 Oct 2014 11:59:32 +0200
parents 4ca6dc0799b6
children
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12163
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /**
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25 * @test
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26 * @bug 8022595
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27 * @summary JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
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28 *
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29 * @run main/othervm ConcurrentClassLoadingTest
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30 */
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31 import java.util.*;
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32 import java.util.concurrent.BrokenBarrierException;
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33 import java.util.concurrent.CyclicBarrier;
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34
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35 public class ConcurrentClassLoadingTest {
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36 int numThreads = 0;
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37 long seed = 0;
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38 CyclicBarrier l;
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39 Random rand;
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40
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41 public static void main(String[] args) throws Throwable {
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42 ConcurrentClassLoadingTest test = new ConcurrentClassLoadingTest();
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43 test.parseArgs(args);
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44 test.run();
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45 }
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46
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47 void parseArgs(String[] args) {
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48 int i = 0;
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49 while (i < args.length) {
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50 String flag = args[i];
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51 switch(flag) {
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52 case "-seed":
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53 seed = Long.parseLong(args[++i]);
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54 break;
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55 case "-numThreads":
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56 numThreads = Integer.parseInt(args[++i]);
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57 break;
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58 default:
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59 throw new Error("Unknown flag: " + flag);
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60 }
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61 ++i;
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62 }
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63 }
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64
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65 void init() {
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66 if (numThreads == 0) {
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67 numThreads = Runtime.getRuntime().availableProcessors();
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68 }
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69
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70 if (seed == 0) {
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71 seed = (new Random()).nextLong();
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72 }
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73 rand = new Random(seed);
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74
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75 l = new CyclicBarrier(numThreads + 1);
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76
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77 System.out.printf("Threads: %d\n", numThreads);
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78 System.out.printf("Seed: %d\n", seed);
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79 }
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80
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81 final List<Loader> loaders = new ArrayList<>();
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82
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83 void prepare() {
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84 List<String> c = new ArrayList<>(Arrays.asList(classNames));
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85
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86 // Split classes between loading threads
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87 int count = (classNames.length / numThreads) + 1;
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88 for (int t = 0; t < numThreads; t++) {
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89 List<String> sel = new ArrayList<>();
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90
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91 System.out.printf("Thread #%d:\n", t);
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92 for (int i = 0; i < count; i++) {
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93 if (c.size() == 0) break;
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94
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95 int k = rand.nextInt(c.size());
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96 String elem = c.remove(k);
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97 sel.add(elem);
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98 System.out.printf("\t%s\n", elem);
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99 }
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100 loaders.add(new Loader(sel));
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101 }
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102
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103 // Print diagnostic info when the test hangs
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104 Runtime.getRuntime().addShutdownHook(new Thread() {
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105 public void run() {
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106 boolean alive = false;
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107 for (Loader l : loaders) {
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108 if (!l.isAlive()) continue;
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109
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110 if (!alive) {
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111 System.out.println("Some threads are still alive:");
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112 alive = true;
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113 }
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114
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115 System.out.println(l.getName());
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116 for (StackTraceElement elem : l.getStackTrace()) {
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117 System.out.println("\t"+elem.toString());
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118 }
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119 }
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120 }
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121 });
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122 }
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123
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124 public void run() throws Throwable {
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125 init();
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126 prepare();
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127
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128 for (Loader loader : loaders) {
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129 loader.start();
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130 }
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131
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132 l.await();
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133
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134 for (Loader loader : loaders) {
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135 loader.join();
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136 }
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137 }
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138
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139 class Loader extends Thread {
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140 List<String> classes;
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141
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142 public Loader(List<String> classes) {
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143 this.classes = classes;
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144 setDaemon(true);
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145 }
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146
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147 @Override
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148 public void run() {
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149 try {
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150 l.await();
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151
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152 for (String name : classes) {
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153 Class.forName(name).getName();
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154 }
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155 } catch (ClassNotFoundException | BrokenBarrierException | InterruptedException e) {
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156 throw new Error(e);
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157 }
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158 }
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159 }
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160
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161 final static String[] classNames = {
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162 "java.lang.invoke.CallSite",
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163 "java.lang.invoke.ConstantCallSite",
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164 "java.lang.invoke.LambdaConversionException",
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165 "java.lang.invoke.LambdaMetafactory",
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166 "java.lang.invoke.MethodHandle",
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167 "java.lang.invoke.MethodHandleInfo",
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168 "java.lang.invoke.MethodHandleProxies",
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169 "java.lang.invoke.MethodHandles",
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170 "java.lang.invoke.MethodType",
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171 "java.lang.invoke.MutableCallSite",
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172 "java.lang.invoke.SerializedLambda",
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173 "java.lang.invoke.SwitchPoint",
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174 "java.lang.invoke.VolatileCallSite",
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175 "java.lang.invoke.WrongMethodTypeException"
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176 };
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177 }