1 /*
 2  * Copyright (c) 2015, 2019, 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 package gc.ergonomics;
25 
26 /*
27  * @test TestInitialGCThreadLogging
28  * @bug 8157240
29  * @summary Check trace logging of initial GC threads.
30  * @key gc
31  * @modules java.base/jdk.internal.misc
32  * @library /test/lib
33  * @build sun.hotspot.WhiteBox
34  * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.ergonomics.TestInitialGCThreadLogging
36  */
37 
38 import jdk.test.lib.process.ProcessTools;
39 import jdk.test.lib.process.OutputAnalyzer;
40 import jtreg.SkippedException;
41 import sun.hotspot.gc.GC;
42 
43 public class TestInitialGCThreadLogging {
44   public static void main(String[] args) throws Exception {
45     boolean noneGCSupported = true;
46 
47     if (GC.ConcMarkSweep.isSupported()) {
48       noneGCSupported = false;
49       testInitialGCThreadLogging("UseConcMarkSweepGC", "GC Thread");
50     }
51 
52     if (GC.G1.isSupported()) {
53       noneGCSupported = false;
54       testInitialGCThreadLogging("UseG1GC", "GC Thread");
55     }
56 
57     if (GC.Parallel.isSupported()) {
58       noneGCSupported = false;
59       testInitialGCThreadLogging("UseParallelGC", "ParGC Thread");
60     }
61 
62     if (GC.Shenandoah.isSupported()) {
63       noneGCSupported = false;
64       testInitialGCThreadLogging("UseShenandoahGC", "Shenandoah GC Thread");
65     }
66 
67     if (noneGCSupported) {
68       throw new SkippedException("Skipping test because none of ConcMarkSweep/G1/Parallel/Shenandoah is supported.");
69     }
70   }
71 
72   private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output, String threadName) {
73     output.shouldHaveExitValue(0); // test should run succesfully
74     output.shouldContain(threadName);
75   }
76 
77   private static void testInitialGCThreadLogging(String gcFlag, String threadName) throws Exception {
78     // UseDynamicNumberOfGCThreads and TraceDynamicGCThreads enabled
79     String[] baseArgs = {"-XX:+UnlockExperimentalVMOptions", "-XX:+" + gcFlag, "-Xmx10M", "-XX:+UseDynamicNumberOfGCThreads", "-Xlog:gc+task=trace", "-version"};
80 
81     // Base test with gc and +UseDynamicNumberOfGCThreads:
82     ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder(baseArgs);
83     verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start()), threadName);
84   }
85 }