1 /*

     2  * Copyright (c) 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 8208499

    27  * @summary NMT should report safepoint polling page(s)

    28  * @key nmt jcmd

    29  * @library /test/lib

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

    31  *          java.management

    32  * @run main/othervm -Xbootclasspath/a:. -XX:NativeMemoryTracking=summary -XX:+ThreadLocalHandshakes SafepointPollingPages

    33  * @run main/othervm -Xbootclasspath/a:. -XX:NativeMemoryTracking=summary -XX:-ThreadLocalHandshakes SafepointPollingPages

    34  */

    35 

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

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

    38 import jdk.test.lib.JDKToolFinder;

    39 import jdk.internal.misc.Unsafe;

    40 

    41 public class SafepointPollingPages {

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

    43     OutputAnalyzer output;

    44 

    45     // Grab my own PID

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

    47     ProcessBuilder pb = new ProcessBuilder();

    48 

    49     // Run 'jcmd <pid> VM.native_memory summary'

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

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

    52     output.shouldContain("Safepoint (reserved=");

    53   }

    54 }

    55