/*

 * 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.

 *

 *

 */

/**

 * @test

 * @bug 6910605

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

 *

 * @run main/othervm -Xmx64m -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot -XX:+DoEscapeAnalysis -Xbatch -XX:InlineSmallCode=2000 Test

 *

 */

/*

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

 *

 * original test: gc/gctests/StringGC

 */

public class Test {

        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 {

                Test t = new Test();

                t.test();

        }

}