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 Verify that jcmd correctly reports that NMT is not enabled 28 * @library /testlibrary 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @run main JcmdWithNMTDisabled 1 32 */ 33 34 import jdk.test.lib.*; 35 36 public class JcmdWithNMTDisabled { 37 static ProcessBuilder pb = new ProcessBuilder(); 38 static String pid; 39 40 public static void main(String args[]) throws Exception { 41 42 // This test explicitly needs to be run with the exact command lines below, not passing on 43 // arguments from the parent VM is a conscious choice to avoid NMT being turned on. 44 if (args.length > 0) { 45 ProcessBuilder pb; 46 OutputAnalyzer output; 47 String testjdkPath = System.getProperty("test.jdk"); 48 49 // First run without enabling NMT 50 pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "JcmdWithNMTDisabled"); 51 output = new OutputAnalyzer(pb.start()); 52 output.shouldHaveExitValue(0); 53 54 // Then run with explicitly disabling NMT, should not be any difference 55 pb = ProcessTools.createJavaProcessBuilder("-Dtest.jdk=" + testjdkPath, "-XX:NativeMemoryTracking=off", "JcmdWithNMTDisabled"); 56 output = new OutputAnalyzer(pb.start()); 57 output.shouldHaveExitValue(0); 58 59 return; 60 } 61 62 // Grab my own PID 63 pid = Long.toString(ProcessTools.getProcessId()); 64 65 jcmdCommand("summary"); 66 jcmdCommand("detail"); 67 jcmdCommand("baseline"); 68 jcmdCommand("summary.diff"); 69 jcmdCommand("detail.diff"); 70 jcmdCommand("scale=GB"); 71 jcmdCommand("shutdown"); 72 } 73 74 // Helper method for invoking different jcmd calls, all should fail with the same message saying NMT is not enabled 75 public static void jcmdCommand(String command) throws Exception { 76 77 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", command}); 78 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 79 80 // Verify that jcmd reports that NMT is not enabled 81 output.shouldContain("Native memory tracking is not enabled"); 82 } 83 }