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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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/*

 * @test

 * @key nmt jcmd

 * @summary Verify that jcmd correctly reports that NMT is not enabled

 * @library /test/lib

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

 *          java.management

 * @run main JcmdWithNMTDisabled 1

 */

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.JDKToolFinder;

public class JcmdWithNMTDisabled {

  static ProcessBuilder pb = new ProcessBuilder();

  static String pid;

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

    // This test explicitly needs to be run with the exact command lines below, not passing on

    // arguments from the parent VM is a conscious choice to avoid NMT being turned on.

    if (args.length > 0) {

      ProcessBuilder pb;

      OutputAnalyzer output;

      String testjdkPath = System.getProperty("test.jdk");

      // First run without enabling NMT

      pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "JcmdWithNMTDisabled");

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

      output.shouldHaveExitValue(0);

      // Then run with explicitly disabling NMT, should not be any difference

      pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "-XX:NativeMemoryTracking=off", "JcmdWithNMTDisabled");

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

      output.shouldHaveExitValue(0);

      return;

    }

    // Grab my own PID

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

    jcmdCommand("summary");

    jcmdCommand("detail");

    jcmdCommand("baseline");

    jcmdCommand("summary.diff");

    jcmdCommand("detail.diff");

    jcmdCommand("scale=GB");

    jcmdCommand("shutdown");

  }

  // Helper method for invoking different jcmd calls, all should fail with the same message saying NMT is not enabled

  public static void jcmdCommand(String command) throws Exception {

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

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

    // Verify that jcmd reports that NMT is not enabled

    output.shouldContain("Native memory tracking is not enabled");

  }

}