65 lines
2.5 KiB
Java
65 lines
2.5 KiB
Java
/*
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* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6853676
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* @summary On computers with more than 4 GB of memory,
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* the GlobalMemoryStatus function can return incorrect information,
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* reporting a value of -1 to indicate an overflow.
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*
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* @run main MemoryStatusOverflow
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*/
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import java.util.ArrayList;
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import java.util.List;
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import java.lang.management.ManagementFactory;
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import com.sun.management.OperatingSystemMXBean;
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public class MemoryStatusOverflow {
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static final long MEMORYSTATUS_OVERFLOW = (1L << 32) - 1; // (DWORD) -1
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public static void main(String... args) throws Exception {
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OperatingSystemMXBean bean = (OperatingSystemMXBean)
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ManagementFactory.getOperatingSystemMXBean();
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List<String> failedGetterNames = new ArrayList<String>();
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List<String> testedGetterNames = Arrays.asList(
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"getTotalSwapSpaceSize", "getFreeSwapSpaceSize",
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"getTotalPhysicalMemorySize", "getFreePhysicalMemorySize");
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for (String getterName : testedGetterNames) {
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Method getter = OperatingSystemMXBean.class.getMethod(getterName);
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long value = (Long) getter.invoke(bean);
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if (value == MEMORYSTATUS_OVERFLOW) {
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failedGetterNames.add(getterName);
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}
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}
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if (!failedGetterNames.isEmpty()) {
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throw new AssertionError(failedGetterNames);
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}
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System.out.println("Test passed.");
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}
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}
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