70 lines
2.8 KiB
Java
70 lines
2.8 KiB
Java
/*
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* Copyright (c) 2017, 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 6653214
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* @requires os.simpleArch=="x64"
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* @run main/othervm -Xmx3000M LargeHeapThresholdTest
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* @summary MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes
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*
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* Large is >= 2 gigabytes
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* This test tries to find memory pools with maximum allowable size of at
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* least 2 gigabytes and set their usage thresholds to this value. If tested
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* Java implementation is defective
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* "java.lang.IllegalArgumentException: Invalid threshold value > max value of size_t"
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* will be thrown.
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* If no pool with maximum allowable size of at least 2 gigabytes exists
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* the test passes. There is a good chance that such pool will exist if JVM
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* is started with '-Xmx3000M' command line switch.
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*/
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import java.lang.management.ManagementFactory;
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import java.lang.management.MemoryPoolMXBean;
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import java.util.List;
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public class LargeHeapThresholdTest {
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final static long TWO_G = ((long) Integer.MAX_VALUE + 1); // 2 gigabytes
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public static void main(String[] args) {
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List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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boolean verified = false;
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for (MemoryPoolMXBean i : pools) {
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if ((i.getUsage().getMax() >= TWO_G)
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&& i.isUsageThresholdSupported()) {
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i.setUsageThreshold(TWO_G);
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if(i.getUsageThreshold() != TWO_G)
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throw new RuntimeException("Usage threshold for"
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+ " pool '" + i.getName() + "' is " + i.getUsageThreshold()
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+ " and not equal to 2GB");
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verified = true;
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}
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}
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System.out.println("Ability to use big heap thresholds has "
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+ (verified ? "" : "NOT ") + "been verified");
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}
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}
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