test/compiler/5091921/Test6935022.java

/*
 * Copyright (c) 2011, 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 6935022
 * @summary Server VM incorrectly breaks out of while loop
 *
 * @run main Test6935022
 */

public class Test6935022 {
    public static final void main(String[] args) throws Exception {
        Test6935022 test = new Test6935022();

        int cnt = 0;

        while (cnt < 10000) {
            try {
                ++cnt;
                if ((cnt&1023) == 0)
                  System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt);
                test.loop(2147483647, (cnt&1023));
            }

            catch (Exception e) {
                System.out.println("Caught on iteration " + cnt);
                e.printStackTrace();
                System.exit(97);
            }
        }
    }

    private void loop(int endingRow, int mask) throws Exception {
        int rows = 1;
        boolean next = true;

        while(rows <= endingRow && next) {
            rows++;
            if (rows == mask)
              System.out.println("Rows="+rows+", end="+endingRow+", next="+next);
            next = next(rows);
        }

        if (next)
            throw new Exception("Ended on rows(no rs): " + rows);
    }

    private boolean next(int rows) {
        return rows < 12;
    }
}