1 /*

     2  * Copyright (c) 2014, 2018, 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

    26  * @bug 8059510

    27  * @summary Test jcmd VM.symboltable, VM.stringtable and VM.systemdictionary options

    28  * @library /test/lib

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

    30  *          java.management

    31  * @run main/othervm -XX:+UnlockDiagnosticVMOptions DumpSymbolAndStringTable

    32  */

    33 import jdk.test.lib.cds.CDSTestUtils;

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

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

    36 import jdk.test.lib.JDKToolFinder;

    37 

    38 public class DumpSymbolAndStringTable {

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

    40         // Grab my own PID

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

    42 

    43         ProcessBuilder pb = new ProcessBuilder();

    44         pb.command(new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.symboltable", "-verbose"});

    45         OutputAnalyzer output = CDSTestUtils.executeAndLog(pb, "jcmd-symboltable");

    46         try {

    47             output.shouldContain("24 2: DumpSymbolAndStringTable\n");

    48         } catch (RuntimeException e) {

    49             output.shouldContain("Unknown diagnostic command");

    50         }

    51 

    52         pb.command(new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.stringtable", "-verbose"});

    53         output = CDSTestUtils.executeAndLog(pb, "jcmd-stringtable");

    54         try {

    55             output.shouldContain("16: java.lang.String\n");

    56         } catch (RuntimeException e) {

    57             output.shouldContain("Unknown diagnostic command");

    58         }

    59 

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

    61         output = CDSTestUtils.executeAndLog(pb, "jcmd-systemdictionary");

    62         try {

    63             output.shouldContain("System Dictionary for 'app' class loader statistics:");

    64             output.shouldContain("Number of buckets");

    65             output.shouldContain("Number of entries");

    66             output.shouldContain("Maximum bucket size");

    67         } catch (RuntimeException e) {

    68             output.shouldContain("Unknown diagnostic command");

    69         }

    70 

    71         pb.command(new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.systemdictionary", "-verbose"});

    72         output = CDSTestUtils.executeAndLog(pb, "jcmd-systemdictionary");

    73         try {

    74             output.shouldContain("Dictionary for loader data: 0x");

    75             output.shouldContain("^java.lang.String");

    76         } catch (RuntimeException e) {

    77             output.shouldContain("Unknown diagnostic command");

    78         }

    79     }

    80 }