1 /*

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

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

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     7  * published by the Free Software Foundation.

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    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  *

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

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    23 

    24 /*

    25  * @test TestPrintReferences

    26  * @bug 8133818

    27  * @summary Validate the reference processing logging

    28  * @key gc

    29  * @library /testlibrary

    30  * @modules java.base/sun.misc

    31  *          java.management

    32  */

    33 

    34 import jdk.test.lib.ProcessTools;

    35 import jdk.test.lib.OutputAnalyzer;

    36 

    37 public class TestPrintReferences {

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

    39     ProcessBuilder pb_enabled =

    40       ProcessTools.createJavaProcessBuilder("-XX:+PrintGCDetails", "-XX:+PrintReferenceGC", "-Xmx10M", GCTest.class.getName());

    41     OutputAnalyzer output = new OutputAnalyzer(pb_enabled.start());

    42 

    43     output.shouldMatch(

    44       "#[0-9]+: \\[SoftReference, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]" +

    45       "#[0-9]+: \\[WeakReference, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]" +

    46       "#[0-9]+: \\[FinalReference, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]" +

    47       "#[0-9]+: \\[PhantomReference, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]" +

    48       "#[0-9]+: \\[Cleaners, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]" +

    49       "#[0-9]+: \\[JNI Weak Reference, [0-9]+ refs, [0-9]+\\.[0-9]+ secs\\]");

    50 

    51     output.shouldHaveExitValue(0);

    52   }

    53 

    54   static class GCTest {

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

    56       System.gc();

    57     }

    58   }

    59 }