ShutdownTwice.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @key nmt jcmd
 * @summary Run shutdown twice
 * @library /testlibrary
 * @run main/othervm -XX:NativeMemoryTracking=detail ShutdownTwice
 */

import com.oracle.java.testlibrary.*;

public class ShutdownTwice {

  public static void main(String args[]) throws Exception {
    // Grab my own PID
    String pid = Integer.toString(ProcessTools.getProcessId());
    OutputAnalyzer output;

    ProcessBuilder pb = new ProcessBuilder();

    // Run 'jcmd <pid> VM.native_memory shutdown'
    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "shutdown"});
    output = new OutputAnalyzer(pb.start());

    // Verify that jcmd reports that NMT is shutting down
    output.shouldContain("Native memory tracking has been turned off");

    // Run shutdown again
    output = new OutputAnalyzer(pb.start());

    // Verify that jcmd reports that NMT has been shutdown already
    output.shouldContain("Native memory tracking has been shutdown");
  }
}