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annotate test/compiler/jsr292/ConcurrentClassLoadingTest.java @ 20218:828056cf311f

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8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname) Summary: A few locations in the code use sizeof(this) which returns the size of the pointer instead of sizeof(classname) which returns the size of the sum of its members. This change fixes these errors and adds a few tests. Reviewed-by: mgerdin, brutisso
author tschatzl
date Mon, 21 Jul 2014 09:40:19 +0200
parents 68ec0a75ee22
children 4ca6dc0799b6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 }