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annotate test/compiler/8004741/Test8004741.java @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 76341426b645
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 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 Test8004741.java
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26 * @bug 8004741
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27 * @summary Missing compiled exception handle table entry for multidimensional array allocation
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28 * @run main/othervm -Xmx64m -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -XX:+StressCompiledExceptionHandlers -XX:+SafepointALot -XX:GuaranteedSafepointInterval=100 Test8004741
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29 * @run main/othervm -Xmx64m -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -XX:+StressCompiledExceptionHandlers Test8004741
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30 */
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31
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32 import java.util.*;
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33
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34 public class Test8004741 extends Thread {
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35
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36 static int passed = 0;
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37
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38 /**
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39 * Loop forever allocating 2-d arrays.
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40 * Catches and rethrows all exceptions; in the case of ThreadDeath, increments passed.
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41 * Note that passed is incremented here because this is the exception handler with
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42 * the smallest scope; we only want to declare success in the case where it is highly
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43 * likely that the test condition
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44 * (exception in 2-d array alloc interrupted by ThreadDeath)
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45 * actually occurs.
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46 */
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47 static int[][] test(int a, int b) throws Exception {
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48 int[][] ar;
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49 try {
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50 ar = new int[a][b];
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51 } catch (ThreadDeath e) {
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52 System.out.println("test got ThreadDeath");
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53 passed++;
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54 throw(e);
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55 }
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56 return ar;
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57 }
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58
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59 /* Cookbook wait-notify to track progress of test thread. */
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60 Object progressLock = new Object();
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61 private static final int NOT_STARTED = 0;
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62 private static final int RUNNING = 1;
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63 private static final int STOPPING = 2;
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64
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65 int progressState = NOT_STARTED;
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66
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67 void toState(int state) {
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68 synchronized (progressLock) {
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69 progressState = state;
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70 progressLock.notify();
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71 }
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72 }
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73
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74 void waitFor(int state) {
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75 synchronized (progressLock) {
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76 while (progressState < state) {
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77 try {
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78 progressLock.wait();
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79 } catch (InterruptedException e) {
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80 e.printStackTrace();
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81 System.out.println("unexpected InterruptedException");
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82 fail();
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83 }
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84 }
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85 if (progressState > state) {
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86 System.out.println("unexpected test state change, expected " +
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87 state + " but saw " + progressState);
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88 fail();
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89 }
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90 }
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91 }
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92
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93 /**
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94 * Loops running test until some sort of an exception or error,
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95 * expects to see ThreadDeath.
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96 */
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97 public void run() {
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98 try {
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99 // Print before state change, so that other thread is most likely
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100 // to see this thread executing calls to test() in a loop.
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101 System.out.println("thread running");
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102 toState(RUNNING);
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103 while (true) {
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104 // (2,2) (2,10) (2,100) were observed to tickle the bug;
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105 test(2, 100);
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106 }
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107 } catch (ThreadDeath e) {
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108 // nothing to say, passing was incremented by the test.
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109 } catch (Throwable e) {
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110 e.printStackTrace();
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111 System.out.println("unexpected Throwable " + e);
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112 fail();
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113 }
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114 toState(STOPPING);
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115 }
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116
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117 /**
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118 * Runs a single trial of the test in a thread.
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119 * No single trial is definitive, since the ThreadDeath
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120 * exception might not land in the tested region of code.
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121 */
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122 public static void threadTest() throws InterruptedException {
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123 Test8004741 t = new Test8004741();
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124 t.start();
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125 t.waitFor(RUNNING);
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126 Thread.sleep(100);
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127 System.out.println("stopping thread");
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128 t.stop();
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129 t.waitFor(STOPPING);
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130 t.join();
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131 }
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132
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133 public static void main(String[] args) throws Exception {
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134 // Warm up "test"
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135 // t will never be started.
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136 for (int n = 0; n < 11000; n++) {
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137 test(2, 100);
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138 }
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139
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140 // Will this sleep help ensure that the compiler is run?
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141 Thread.sleep(500);
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142 passed = 0;
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143
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144 try {
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145 test(-1, 100);
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146 System.out.println("Missing NegativeArraySizeException #1");
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147 fail();
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148 } catch ( java.lang.NegativeArraySizeException e ) {
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149 System.out.println("Saw expected NegativeArraySizeException #1");
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150 }
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151
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152 try {
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153 test(100, -1);
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154 fail();
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155 System.out.println("Missing NegativeArraySizeException #2");
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156 fail();
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157 } catch ( java.lang.NegativeArraySizeException e ) {
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158 System.out.println("Saw expected NegativeArraySizeException #2");
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159 }
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160
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161 /* Test repetitions. If the test succeeds-mostly, it succeeds,
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162 * as long as it does not crash (the outcome if the exception range
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163 * table entry for the array allocation is missing).
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164 */
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165 int N = 12;
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166 for (int n = 0; n < N; n++) {
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167 threadTest();
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168 }
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169
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170 if (passed > N/2) {
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171 System.out.println("Saw " + passed + " out of " + N + " possible ThreadDeath hits");
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172 System.out.println("PASSED");
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173 } else {
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174 System.out.println("Too few ThreadDeath hits; expected at least " + N/2 +
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175 " but saw only " + passed);
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176 fail();
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177 }
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178 }
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179
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180 static void fail() {
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181 System.out.println("FAILED");
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182 System.exit(97);
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183 }
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184 };