1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2018, SAP and/or its affiliates. All rights reserved.

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

     5  *

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

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

     8  * published by the Free Software Foundation.

     9  *

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

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

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

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

    14  * accompanied this code).

    15  *

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

    17  * 2 along with this work; if not, write to the Free Software Foundation,

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

    19  *

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

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

    22  * questions.

    23  */

    24 

    25 import jdk.test.lib.process.ProcessTools;

    26 import jdk.test.lib.process.OutputAnalyzer;

    27 import jdk.test.lib.JDKToolFinder;

    28 

    29 /*

    30  * @test

    31  * @key metaspace jcmd

    32  * @summary Test the VM.metaspace command

    33  * @library /test/lib

    34  * @modules java.base/jdk.internal.misc

    35  *          java.management

    36  * @run main/othervm -XX:MaxMetaspaceSize=201M -XX:+VerifyMetaspace -XX:+UseCompressedClassPointers PrintMetaspaceDcmd with-compressed-class-space

    37  * @run main/othervm -XX:MaxMetaspaceSize=201M -XX:+VerifyMetaspace -XX:-UseCompressedClassPointers PrintMetaspaceDcmd without-compressed-class-space

    38  */

    39 

    40 public class PrintMetaspaceDcmd {

    41 

    42     // Run jcmd VM.metaspace against a VM with CompressedClassPointers on.

    43     // The report should detail Non-Class and Class portions separately.

    44     private static void doTheTest(boolean usesCompressedClassSpace) throws Exception {

    45         ProcessBuilder pb = new ProcessBuilder();

    46         OutputAnalyzer output;

    47         // Grab my own PID

    48         String pid = Long.toString(ProcessTools.getProcessId());

    49 

    50         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "basic"});

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

    52         output.shouldHaveExitValue(0);

    53         if (usesCompressedClassSpace) {

    54             output.shouldContain("Non-Class:");

    55             output.shouldContain("Class:");

    56         }

    57         output.shouldContain("Virtual space:");

    58         output.shouldContain("Chunk freelists:");

    59 

    60 

    61         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace"});

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

    63         output.shouldHaveExitValue(0);

    64         if (usesCompressedClassSpace) {

    65             output.shouldContain("Non-Class:");

    66             output.shouldContain("Class:");

    67         }

    68         output.shouldContain("Virtual space:");

    69         output.shouldContain("Chunk freelist");

    70         output.shouldContain("Waste");

    71         output.shouldMatch("MaxMetaspaceSize:.*201.00.*MB");

    72 

    73         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "show-loaders"});

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

    75         output.shouldHaveExitValue(0);

    76         output.shouldMatch("ClassLoaderData.*for <bootloader>");

    77 

    78         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "by-chunktype"});

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

    80         output.shouldHaveExitValue(0);

    81         output.shouldContain("specialized:");

    82         output.shouldContain("small:");

    83         output.shouldContain("medium:");

    84         output.shouldContain("humongous:");

    85 

    86         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "vslist"});

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

    88         output.shouldHaveExitValue(0);

    89         output.shouldContain("Virtual space list");

    90         output.shouldMatch("node.*reserved.*committed.*used.*");

    91 

    92         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "vsmap"});

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

    94         output.shouldHaveExitValue(0);

    95         output.shouldContain("Virtual space map:");

    96         output.shouldContain("HHHHHHHHHHH");

    97 

    98         // Test with different scales

    99         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=G"});

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

   101         output.shouldHaveExitValue(0);

   102         output.shouldMatch("MaxMetaspaceSize:.*0.2.*GB");

   103 

   104         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=K"});

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

   106         output.shouldHaveExitValue(0);

   107         output.shouldMatch("MaxMetaspaceSize:.*205824.00 KB");

   108 

   109         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.metaspace", "scale=1"});

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

   111         output.shouldHaveExitValue(0);

   112         output.shouldMatch("MaxMetaspaceSize:.*210763776 bytes");

   113     }

   114 

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

   116         boolean testForCompressedClassSpace = false;

   117         if (args[0].equals("with-compressed-class-space")) {

   118             testForCompressedClassSpace = true;

   119         } else if (args[0].equals("without-compressed-class-space")) {

   120             testForCompressedClassSpace = false;

   121         } else {

   122             throw new IllegalArgumentException("Invalid argument: " + args[0]);

   123         }

   124         doTheTest(testForCompressedClassSpace);

   125     }

   126 }