1 /*

     2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 /**

    25  * @test TestMemoryMXBeans

    26  * @summary Test JMX memory beans

    27  * @key gc

    28  * @requires vm.gc.Shenandoah

    29  * @modules java.base/jdk.internal.misc

    30  *          java.management

    31  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC          -Xmx1g TestMemoryMXBeans   -1 1024

    32  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xms1g   -Xmx1g TestMemoryMXBeans 1024 1024

    33  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xms128m -Xmx1g TestMemoryMXBeans  128 1024

    34  */

    35 

    36 import java.lang.management.*;

    37 import java.util.*;

    38 

    39 public class TestMemoryMXBeans {

    40 

    41     public static void main(String[] args) throws Exception {

    42         if (args.length < 2) {

    43             throw new IllegalStateException("Should provide expected heap sizes");

    44         }

    45 

    46         long initSize = 1L * Integer.parseInt(args[0]) * 1024 * 1024;

    47         long maxSize  = 1L * Integer.parseInt(args[1]) * 1024 * 1024;

    48 

    49         testMemoryBean(initSize, maxSize);

    50     }

    51 

    52     public static void testMemoryBean(long initSize, long maxSize) {

    53         MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();

    54         long heapInit = memoryMXBean.getHeapMemoryUsage().getInit();

    55         long heapMax = memoryMXBean.getHeapMemoryUsage().getMax();

    56         long nonHeapInit = memoryMXBean.getNonHeapMemoryUsage().getInit();

    57         long nonHeapMax = memoryMXBean.getNonHeapMemoryUsage().getMax();

    58 

    59         if (initSize > 0 && heapInit != initSize) {

    60             throw new IllegalStateException("Init heap size is wrong: " + heapInit + " vs " + initSize);

    61         }

    62         if (maxSize > 0 && heapMax != maxSize) {

    63             throw new IllegalStateException("Max heap size is wrong: " + heapMax + " vs " + maxSize);

    64         }

    65     }

    66 }