/*

 * Copyright (c) 2010, 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.

 *

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 * questions.

 */

/**

 * @test

 * @bug 6910605

 * @summary C2: NullPointerException/ClassCaseException is thrown when C2 with DeoptimizeALot is used

 *

 * @run main/othervm -Xmx128m -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot

 *      -XX:+DoEscapeAnalysis -Xbatch -XX:InlineSmallCode=2000

 *      compiler.c2.Test6910605_2

 */

package compiler.c2;

/*

 * Added InlineSmallCode=2000 to guaranty inlining of StringBuilder::append() to allow scalar replace StringBuilder object.

 *

 * original test: gc/gctests/StringGC

 */

public class Test6910605_2 {

    private final String toAdd = "0123456789abcdef";

    private int maxLength;

    private static final int numberOfThreads = 8;

    private class StringAdder extends Thread {

        private String s;

        public void test() {

            s = s + toAdd;

        }

        public void run() {

            do {

                test();

            } while (s.length() < maxLength);

        }

    }

    public void test() throws InterruptedException {

        maxLength = toAdd.length() * 15000 / numberOfThreads;

        StringAdder[] sa = new StringAdder[numberOfThreads];

        for (int i = 0; i < numberOfThreads; i++) {

            sa[i] = new StringAdder();

            sa[i].start();

        }

        for (int i = 0; i < numberOfThreads; i++) {

            sa[i].join();

        }

    }

    public static void main(String[] args) throws InterruptedException {

        Test6910605_2 t = new Test6910605_2();

        t.test();

    }

}