Mercurial > hg > truffle
annotate test/compiler/testlibrary/rtm/AbortProvoker.java @ 18377:ed0fce2e999a
Fold klass._java_mirror._klass into klass and improve stamps from layout_helper
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 14 Nov 2014 09:32:59 -0800 |
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1 /* |
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2 * Copyright (c) 2014, 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 package rtm; |
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26 |
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27 import java.util.Objects; |
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28 import java.util.concurrent.BrokenBarrierException; |
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29 import java.util.concurrent.CyclicBarrier; |
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30 |
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31 import com.oracle.java.testlibrary.Asserts; |
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32 import com.oracle.java.testlibrary.Utils; |
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33 import sun.misc.Unsafe; |
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34 |
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35 /** |
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36 * Base class for different transactional execution abortion |
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37 * provokers aimed to force abort due to specified reason. |
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38 */ |
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39 public abstract class AbortProvoker implements CompilableTest { |
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40 public static final long DEFAULT_ITERATIONS = 10000L; |
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41 /** |
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42 * Inflates monitor associated with object {@code monitor}. |
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43 * Inflation is forced by entering the same monitor from |
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44 * two different threads. |
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45 * |
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46 * @param monitor monitor to be inflated. |
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47 * @return inflated monitor. |
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48 * @throws Exception if something went wrong. |
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49 */ |
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50 public static Object inflateMonitor(Object monitor) throws Exception { |
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51 Unsafe unsafe = Utils.getUnsafe(); |
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52 CyclicBarrier barrier = new CyclicBarrier(2); |
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53 |
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54 Runnable inflatingRunnable = () -> { |
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55 unsafe.monitorEnter(monitor); |
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56 try { |
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57 barrier.await(); |
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58 barrier.await(); |
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59 } catch (InterruptedException | BrokenBarrierException e) { |
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60 throw new RuntimeException( |
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61 "Synchronization issue occurred.", e); |
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62 } finally { |
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63 unsafe.monitorExit(monitor); |
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64 } |
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65 }; |
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66 |
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67 Thread t = new Thread(inflatingRunnable); |
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68 t.start(); |
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69 // Wait until thread t enters the monitor. |
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70 barrier.await(); |
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71 // At this point monitor will be owned by thread t, |
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72 // so our attempt to enter the same monitor will force |
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73 // monitor inflation. |
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74 Asserts.assertFalse(unsafe.tryMonitorEnter(monitor), |
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75 "Not supposed to enter the monitor first"); |
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76 barrier.await(); |
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77 t.join(); |
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78 return monitor; |
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79 } |
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80 |
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81 |
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82 /** |
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83 * Get instance of specified AbortProvoker, inflate associated monitor |
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84 * if needed and then invoke forceAbort method in a loop. |
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85 * |
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86 * Usage: |
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87 * AbortProvoker <AbortType name> [<inflate monitor> |
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88 * [<iterations> [ <delay>]]] |
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89 * |
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90 * Default parameters are: |
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91 * <ul> |
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92 * <li>inflate monitor = <b>true</b></li> |
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93 * <li>iterations = {@code AbortProvoker.DEFAULT_ITERATIONS}</li> |
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94 * <li>delay = <b>0</b></li> |
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95 * </ul> |
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96 */ |
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97 public static void main(String args[]) throws Throwable { |
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98 Asserts.assertGT(args.length, 0, "At least one argument is required."); |
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99 |
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100 AbortType abortType = AbortType.lookup(Integer.valueOf(args[0])); |
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101 boolean monitorShouldBeInflated = true; |
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102 long iterations = AbortProvoker.DEFAULT_ITERATIONS; |
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103 |
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104 if (args.length > 1) { |
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105 monitorShouldBeInflated = Boolean.valueOf(args[1]); |
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106 |
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107 if (args.length > 2) { |
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108 iterations = Long.valueOf(args[2]); |
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109 |
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110 if (args.length > 3) { |
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111 Thread.sleep(Integer.valueOf(args[3])); |
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112 } |
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113 } |
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114 } |
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115 |
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116 AbortProvoker provoker = abortType.provoker(); |
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117 |
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118 if (monitorShouldBeInflated) { |
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119 provoker.inflateMonitor(); |
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120 } |
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121 |
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122 for (long i = 0; i < iterations; i++) { |
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123 provoker.forceAbort(); |
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124 } |
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125 } |
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126 |
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127 protected final Object monitor; |
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128 |
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129 protected AbortProvoker() { |
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130 this(new Object()); |
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131 } |
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132 |
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133 protected AbortProvoker(Object monitor) { |
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134 this.monitor = Objects.requireNonNull(monitor); |
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135 } |
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136 |
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137 /** |
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138 * Inflates monitor used by this AbortProvoker instance. |
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139 * @throws Exception |
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140 */ |
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141 public void inflateMonitor() throws Exception { |
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142 AbortProvoker.inflateMonitor(monitor); |
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143 } |
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144 |
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145 /** |
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146 * Forces transactional execution abortion. |
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147 */ |
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148 public abstract void forceAbort(); |
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149 |
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150 /** |
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151 * Returns names of all methods that have to be compiled |
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152 * in order to successfully force transactional execution |
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153 * abortion. |
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154 * |
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155 * @return array with methods' names that have to be compiled. |
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156 */ |
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157 @Override |
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158 public String[] getMethodsToCompileNames() { |
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159 return new String[] { getMethodWithLockName() }; |
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160 } |
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161 |
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162 /** |
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163 * Returns name of the method that will contain monitor whose locking |
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164 * will be elided using transactional execution. |
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165 * |
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166 * @return name of the method that will contain elided lock. |
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167 */ |
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168 @Override |
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169 public String getMethodWithLockName() { |
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170 return this.getClass().getName() + "::forceAbort"; |
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171 } |
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172 } |