1 /*

     2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug     4858522

    27  * @summary Basic unit test of HotspotClassLoadingMBean.getUnloadedClassSize()

    28  * @author  Steve Bohne

    29  *

    30  * @run main/othervm -XX:+UsePerfData GetUnloadedClassSize

    31  */

    32 

    33 /*

    34  * This test is just a sanity check and does not check for the correct value.

    35  */

    36 

    37 import sun.management.*;

    38 

    39 public class GetUnloadedClassSize {

    40 

    41     private static HotspotClassLoadingMBean mbean =

    42         (HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean();

    43 

    44     // Careful with these values.

    45     private static final long MIN_VALUE_FOR_PASS = 0;

    46     private static final long MAX_VALUE_FOR_PASS = Long.MAX_VALUE;

    47 

    48     private static boolean trace = false;

    49 

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

    51         if (args.length > 0 && args[0].equals("trace")) {

    52             trace = true;

    53         }

    54 

    55         long value = mbean.getUnloadedClassSize();

    56 

    57         if (trace) {

    58             System.out.println("Unloaded class size (bytes): " + value);

    59         }

    60 

    61         if (value < MIN_VALUE_FOR_PASS || value > MAX_VALUE_FOR_PASS) {

    62             throw new RuntimeException("Unloaded class size " +

    63                                        "illegal value: " + value + " bytes " +

    64                                        "(MIN = " + MIN_VALUE_FOR_PASS + "; " +

    65                                        "MAX = " + MAX_VALUE_FOR_PASS + ")");

    66         }

    67 

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

    69     }

    70 }