test/runtime/NMT/SummaryAfterShutdown.java

/*
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/*
 * @test
 * @key nmt jcmd
 * @summary Verify that jcmd correctly reports that NMT is not enabled after a shutdown
 * @library /testlibrary
 * @run main/othervm -XX:NativeMemoryTracking=detail SummaryAfterShutdown
 */

import com.oracle.java.testlibrary.*;

public class SummaryAfterShutdown {

  public static void main(String args[]) throws Exception {
    OutputAnalyzer output;
    // Grab my own PID
    String pid = Integer.toString(ProcessTools.getProcessId());
    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 'jcmd <pid> VM.native_memory summary'
    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
    output = new OutputAnalyzer(pb.start());

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