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.
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   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
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  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  * @ignore 8067167
  31  * @build ChangeTrackingLevel
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ChangeTrackingLevel
  35  */
  36 
  37 import com.oracle.java.testlibrary.*;
  38 import sun.hotspot.WhiteBox;
  39 
  40 public class ChangeTrackingLevel {
  41 
  42     public static WhiteBox wb = WhiteBox.getWhiteBox();
  43     public static void main(String args[]) throws Exception {
  44         boolean testChangeLevel = wb.NMTChangeTrackingLevel();
  45         if (testChangeLevel) {
  46             System.out.println("NMT level change test passed.");
  47         } else {
  48             // it also fails if the VM asserts.
  49             throw new RuntimeException("NMT level change test failed");
  50         }
  51     }
  52 };