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/*
* 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;
}
}
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