| /* |
| * 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."); |
| } |
| } |