/*

 * Copyright (c) 2012, 2015, 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     6853676

 * @summary On computers with more than 4 GB of memory,

 *      the GlobalMemoryStatus function can return incorrect information,

 *      reporting a value of -1 to indicate an overflow.

 *

 * @run main MemoryStatusOverflow

 */

import java.lang.reflect.Method;

import java.util.Arrays;

import java.util.ArrayList;

import java.util.List;

import java.lang.management.ManagementFactory;

import com.sun.management.OperatingSystemMXBean;

public class MemoryStatusOverflow {

    static final long MEMORYSTATUS_OVERFLOW = (1L << 32) - 1; // (DWORD) -1

    public static void main(String... args) throws Exception {

        OperatingSystemMXBean bean = (OperatingSystemMXBean)

                ManagementFactory.getOperatingSystemMXBean();

        List<String> failedGetterNames = new ArrayList<String>();

        List<String> testedGetterNames = Arrays.asList(

                "getTotalSwapSpaceSize",      "getFreeSwapSpaceSize",

                "getTotalPhysicalMemorySize", "getFreePhysicalMemorySize");

        for (String getterName : testedGetterNames) {

            Method getter = OperatingSystemMXBean.class.getMethod(getterName);

            long value = (Long) getter.invoke(bean);

            if (value == MEMORYSTATUS_OVERFLOW) {

                failedGetterNames.add(getterName);

            }

        }

        if (!failedGetterNames.isEmpty()) {

            throw new AssertionError(failedGetterNames);

        }

        System.out.println("Test passed.");

    }

}