1 /*
   2  * Copyright (c) 2013, 2016, 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 Verify that jcmd correctly reports that NMT is not enabled
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @run driver JcmdWithNMTDisabled 1
  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 JcmdWithNMTDisabled {
  39   static ProcessBuilder pb = new ProcessBuilder();
  40   static String pid;
  41 
  42   public static void main(String args[]) throws Exception {
  43 
  44     // This test explicitly needs to be run with the exact command lines below, not passing on
  45     // arguments from the parent VM is a conscious choice to avoid NMT being turned on.
  46     if (args.length > 0) {
  47       ProcessBuilder pb;
  48       OutputAnalyzer output;
  49       String testjdkPath = System.getProperty("test.jdk");
  50 
  51       // First run without enabling NMT
  52       pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "JcmdWithNMTDisabled");
  53       output = new OutputAnalyzer(pb.start());
  54       output.shouldHaveExitValue(0);
  55 
  56       // Then run with explicitly disabling NMT, should not be any difference
  57       pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "-XX:NativeMemoryTracking=off", "JcmdWithNMTDisabled");
  58       output = new OutputAnalyzer(pb.start());
  59       output.shouldHaveExitValue(0);
  60 
  61       return;
  62     }
  63 
  64     // Grab my own PID
  65     pid = Long.toString(ProcessTools.getProcessId());
  66 
  67     jcmdCommand("summary");
  68     jcmdCommand("detail");
  69     jcmdCommand("baseline");
  70     jcmdCommand("summary.diff");
  71     jcmdCommand("detail.diff");
  72     jcmdCommand("scale=GB");
  73     jcmdCommand("shutdown");
  74   }
  75 
  76   // Helper method for invoking different jcmd calls, all should fail with the same message saying NMT is not enabled
  77   public static void jcmdCommand(String command) throws Exception {
  78 
  79     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", command});
  80     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  81 
  82     // Verify that jcmd reports that NMT is not enabled
  83     output.shouldContain("Native memory tracking is not enabled");
  84   }
  85 }