1 /*
   2  * Copyright (c) 2013, 2014, 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  * @bug 8059100
  27  * @summary Test that you can decrease NMT tracking level but not increase it.
  28  * @key nmt
  29  * @library /testlibrary /../../test/lib
  30  * @build ChangeTrackingLevel
  31  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  32  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ChangeTrackingLevel
  34  */
  35 
  36 import com.oracle.java.testlibrary.*;
  37 import sun.hotspot.WhiteBox;
  38 
  39 public class ChangeTrackingLevel {
  40 
  41     public static WhiteBox wb = WhiteBox.getWhiteBox();
  42     public static void main(String args[]) throws Exception {
  43         boolean testChangeLevel = wb.NMTChangeTrackingLevel();
  44         if (testChangeLevel) {
  45             System.out.println("NMT level change test passed.");
  46         } else {
  47             // it also fails if the VM asserts.
  48             throw new RuntimeException("NMT level change test failed");
  49         }
  50     }
  51 };