1 /*
 2  * Copyright Amazon.com Inc. 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 /*
26  * @test id=default-rotation
27  * @requires vm.gc.Shenandoah
28  *
29  * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
30  *      -XX:+ShenandoahRegionSampling -XX:+ShenandoahRegionSampling
31  *      -Xlog:gc+region=trace:region-snapshots-%p.log::filesize=100,filecount=3
32  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
33  *      TestRegionSamplingLogging
34  */
35 
36 /*
37  * @test id=generational-rotation
38  * @requires vm.gc.Shenandoah
39  *
40  * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
41  *      -XX:+ShenandoahRegionSampling -XX:+ShenandoahRegionSampling
42  *      -Xlog:gc+region=trace:region-snapshots-%p.log::filesize=100,filecount=3
43  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive -XX:ShenandoahGCMode=generational
44  *      TestRegionSamplingLogging
45  */
46 import java.io.File;
47 import java.util.Arrays;
48 
49 public class TestRegionSamplingLogging {
50 
51     static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
52 
53     static volatile Object sink;
54 
55     public static void main(String[] args) throws Exception {
56         long count = TARGET_MB * 1024 * 1024 / 16;
57         for (long c = 0; c < count; c++) {
58             sink = new Object();
59         }
60 
61         File directory = new File(".");
62         File[] files = directory.listFiles((dir, name) -> name.startsWith("region-snapshots") && name.endsWith(".log"));
63         System.out.println(Arrays.toString(files));
64         if (files == null || files.length == 0) {
65             throw new IllegalStateException("Did not find expected snapshot log file.");
66         }
67     }
68 }