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