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1 /*
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2 * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any 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 6589834
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27 * @summary: deoptimization problem with -XX:+DeoptimizeALot
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28 *
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29 * @run main/othervm -server Test_ia32
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30 */
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31
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32 /***************************************************************************************
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33 NOTE: The bug shows up (with several "Bug!" message) even without the
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34 flag -XX:+DeoptimizeALot. In a debug build, you may want to try
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35 the flags -XX:+VerifyStack and -XX:+DeoptimizeALot to get more information.
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36 ****************************************************************************************/
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37 import java.lang.reflect.Constructor;
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38
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39 public class Test_ia32 {
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40
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41 public static int NUM_THREADS = 100;
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42
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43 public static int CLONE_LENGTH = 1000;
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44
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45 public static void main(String[] args) throws InterruptedException, ClassNotFoundException {
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46
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47 Reflector[] threads = new Reflector[NUM_THREADS];
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48 for (int i = 0; i < threads.length; i++) {
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49 threads[i] = new Reflector();
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50 threads[i].start();
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51 }
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52
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53 System.out.println("Give Reflector.run() some time to compile...");
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54 Thread.sleep(5000);
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55
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56 System.out.println("Load RMISecurityException causing run() deoptimization");
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57 ClassLoader.getSystemClassLoader().loadClass("java.rmi.RMISecurityException");
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58
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59 for (Reflector thread : threads)
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60 thread.requestStop();
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61
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62 for (Reflector thread : threads)
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63 try {
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64 thread.join();
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65 } catch (InterruptedException e) {
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66 System.out.println(e);
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67 }
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68
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69 }
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70
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71 }
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72
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73 class Reflector extends Thread {
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74
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75 volatile boolean _doSpin = true;
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76
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77 Test_ia32[] _tests;
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78
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79 Reflector() {
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80 _tests = new Test_ia32[Test_ia32.CLONE_LENGTH];
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81 for (int i = 0; i < _tests.length; i++) {
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82 _tests[i] = new Test_ia32();
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83 }
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84 }
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85
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86 static int g(int i1, int i2, Test_ia32[] arr, int i3, int i4) {
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87
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88 if (!(i1==1 && i2==2 && i3==3 && i4==4)) {
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89 System.out.println("Bug!");
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90 }
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91
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92 return arr.length;
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93 }
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94
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95 static int f(Test_ia32[] arr) {
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96 return g(1, 2, arr.clone(), 3, 4);
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97 }
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98
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99 @Override
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100 public void run() {
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101 Constructor[] ctrs = null;
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102 Class<Test_ia32> klass = Test_ia32.class;
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103 try {
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104 ctrs = klass.getConstructors();
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105 } catch (SecurityException e) {
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106 System.out.println(e);
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107 }
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108
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109 try {
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110 while (_doSpin) {
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111 if (f(_tests) < 0)
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112 System.out.println("return value usage");
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113 }
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114 } catch (NullPointerException e) {
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115 e.printStackTrace();
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116 }
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117
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118 System.out.println(this + " - stopped.");
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119 }
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120
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121 public void requestStop() {
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122 System.out.println(this + " - stop requested.");
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123 _doSpin = false;
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124 }
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125
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126 }
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