| /* |
| * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 6589834 |
| * @summary deoptimization problem with -XX:+DeoptimizeALot |
| * |
| * @run main Test_ia32 |
| */ |
| |
| /*************************************************************************************** |
| NOTE: The bug shows up (with several "Bug!" message) even without the |
| flag -XX:+DeoptimizeALot. In a debug build, you may want to try |
| the flags -XX:+VerifyStack and -XX:+DeoptimizeALot to get more information. |
| ****************************************************************************************/ |
| import java.lang.reflect.Constructor; |
| |
| public class Test_ia32 { |
| |
| public static int NUM_THREADS = 100; |
| |
| public static int CLONE_LENGTH = 1000; |
| |
| public static void main(String[] args) throws InterruptedException, ClassNotFoundException { |
| |
| Reflector[] threads = new Reflector[NUM_THREADS]; |
| for (int i = 0; i < threads.length; i++) { |
| threads[i] = new Reflector(); |
| threads[i].start(); |
| } |
| |
| System.out.println("Give Reflector.run() some time to compile..."); |
| Thread.sleep(5000); |
| |
| System.out.println("Load RMISecurityException causing run() deoptimization"); |
| ClassLoader.getSystemClassLoader().loadClass("java.rmi.RMISecurityException"); |
| |
| for (Reflector thread : threads) |
| thread.requestStop(); |
| |
| for (Reflector thread : threads) |
| try { |
| thread.join(); |
| } catch (InterruptedException e) { |
| System.out.println(e); |
| } |
| |
| } |
| |
| } |
| |
| class Reflector extends Thread { |
| |
| volatile boolean _doSpin = true; |
| |
| Test_ia32[] _tests; |
| |
| Reflector() { |
| _tests = new Test_ia32[Test_ia32.CLONE_LENGTH]; |
| for (int i = 0; i < _tests.length; i++) { |
| _tests[i] = new Test_ia32(); |
| } |
| } |
| |
| static int g(int i1, int i2, Test_ia32[] arr, int i3, int i4) { |
| |
| if (!(i1==1 && i2==2 && i3==3 && i4==4)) { |
| System.out.println("Bug!"); |
| } |
| |
| return arr.length; |
| } |
| |
| static int f(Test_ia32[] arr) { |
| return g(1, 2, arr.clone(), 3, 4); |
| } |
| |
| @Override |
| public void run() { |
| Constructor[] ctrs = null; |
| Class<Test_ia32> klass = Test_ia32.class; |
| try { |
| ctrs = klass.getConstructors(); |
| } catch (SecurityException e) { |
| System.out.println(e); |
| } |
| |
| try { |
| while (_doSpin) { |
| if (f(_tests) < 0) |
| System.out.println("return value usage"); |
| } |
| } catch (NullPointerException e) { |
| e.printStackTrace(); |
| } |
| |
| System.out.println(this + " - stopped."); |
| } |
| |
| public void requestStop() { |
| System.out.println(this + " - stop requested."); |
| _doSpin = false; |
| } |
| |
| } |