1 /*

     2  * Copyright (c) 2013, 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 CheckAllocateAndSystemGC

    26  * @summary CMS: assert(used() == used_after_gc && used_after_gc <= capacity()) failed: used: 0 used_after_gc: 292080 capacity: 1431699456

    27  * @bug 8013032

    28  * @key gc

    29  * @key regression

    30  * @library /testlibrary

    31  * @run main/othervm CheckAllocateAndSystemGC

    32  * @author jon.masamitsu@oracle.com

    33  */

    34 

    35 import com.oracle.java.testlibrary.*;

    36 

    37 public class CheckAllocateAndSystemGC {

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

    39 

    40     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    41       "-showversion",

    42       "-XX:+UseConcMarkSweepGC",

    43       "-Xmn4m",

    44       "-XX:MaxTenuringThreshold=1",

    45       "-XX:-UseCMSCompactAtFullCollection",

    46       "CheckAllocateAndSystemGC$AllocateAndSystemGC"

    47       );

    48 

    49     OutputAnalyzer output = new OutputAnalyzer(pb.start());

    50 

    51     output.shouldNotContain("error");

    52 

    53     output.shouldHaveExitValue(0);

    54   }

    55   static class AllocateAndSystemGC {

    56     public static void main(String [] args) {

    57       Integer x[] = new Integer [1000];

    58       // Allocate enough objects to cause a minor collection.

    59       // These allocations suffice for a 4m young geneneration.

    60       for (int i = 0; i < 100; i++) {

    61         Integer y[] = new Integer[10000];

    62       }

    63       System.gc();

    64     }

    65   }

    66 }