1 /*
   2  * Copyright (c) 2013, 2015, 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  * @key nmt jcmd
  27  * @summary Run shutdown twice
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @run main/othervm -XX:NativeMemoryTracking=detail ShutdownTwice
  32  */
  33 
  34 import jdk.test.lib.process.ProcessTools;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 import jdk.test.lib.JDKToolFinder;
  37 
  38 public class ShutdownTwice {
  39 
  40   public static void main(String args[]) throws Exception {
  41     // Grab my own PID
  42     String pid = Long.toString(ProcessTools.getProcessId());
  43     OutputAnalyzer output;
  44 
  45     ProcessBuilder pb = new ProcessBuilder();
  46 
  47     // Run 'jcmd <pid> VM.native_memory shutdown'
  48     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "shutdown"});
  49     output = new OutputAnalyzer(pb.start());
  50 
  51     // Verify that jcmd reports that NMT is shutting down
  52     output.shouldContain("Native memory tracking has been turned off");
  53 
  54     // Run shutdown again
  55     output = new OutputAnalyzer(pb.start());
  56 
  57     // Verify that jcmd reports that NMT has been shutdown already
  58     output.shouldContain("Native memory tracking has been shutdown");
  59   }
  60 }