1 /* 2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 6589834 27 * @summary deoptimization problem with -XX:+DeoptimizeALot 28 * 29 * @run main Test_ia32 30 */ 31 32 /*************************************************************************************** 33 NOTE: The bug shows up (with several "Bug!" message) even without the 34 flag -XX:+DeoptimizeALot. In a debug build, you may want to try 35 the flags -XX:+VerifyStack and -XX:+DeoptimizeALot to get more information. 36 ****************************************************************************************/ 37 import java.lang.reflect.Constructor; 38 39 public class Test_ia32 { 40 41 public static int NUM_THREADS = 100; 42 43 public static int CLONE_LENGTH = 1000; 44 45 public static void main(String[] args) throws InterruptedException, ClassNotFoundException { 46 47 Reflector[] threads = new Reflector[NUM_THREADS]; 48 for (int i = 0; i < threads.length; i++) { 49 threads[i] = new Reflector(); 50 threads[i].start(); 51 } 52 53 System.out.println("Give Reflector.run() some time to compile..."); 54 Thread.sleep(5000); 55 56 System.out.println("Load RMISecurityException causing run() deoptimization"); 57 ClassLoader.getSystemClassLoader().loadClass("java.rmi.RMISecurityException"); 58 59 for (Reflector thread : threads) 60 thread.requestStop(); 61 62 for (Reflector thread : threads) 63 try { 64 thread.join(); 65 } catch (InterruptedException e) { 66 System.out.println(e); 67 } 68 69 } 70 71 } 72 73 class Reflector extends Thread { 74 75 volatile boolean _doSpin = true; 76 77 Test_ia32[] _tests; 78 79 Reflector() { 80 _tests = new Test_ia32[Test_ia32.CLONE_LENGTH]; 81 for (int i = 0; i < _tests.length; i++) { 82 _tests[i] = new Test_ia32(); 83 } 84 } 85 86 static int g(int i1, int i2, Test_ia32[] arr, int i3, int i4) { 87 88 if (!(i1==1 && i2==2 && i3==3 && i4==4)) { 89 System.out.println("Bug!"); 90 } 91 92 return arr.length; 93 } 94 95 static int f(Test_ia32[] arr) { 96 return g(1, 2, arr.clone(), 3, 4); 97 } 98 99 @Override 100 public void run() { 101 Constructor[] ctrs = null; 102 Class<Test_ia32> klass = Test_ia32.class; 103 try { 104 ctrs = klass.getConstructors(); 105 } catch (SecurityException e) { 106 System.out.println(e); 107 } 108 109 try { 110 while (_doSpin) { 111 if (f(_tests) < 0) 112 System.out.println("return value usage"); 113 } 114 } catch (NullPointerException e) { 115 e.printStackTrace(); 116 } 117 118 System.out.println(this + " - stopped."); 119 } 120 121 public void requestStop() { 122 System.out.println(this + " - stop requested."); 123 _doSpin = false; 124 } 125 126 }