1 /*
   2  * Copyright (c) 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  * @key nmt jcmd
  27  * @library /testlibrary /testlibrary/whitebox
  28  * @build ThreadedMallocTestType
  29  * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ThreadedMallocTestType
  30  */
  31 
  32 import com.oracle.java.testlibrary.*;
  33 import sun.hotspot.WhiteBox;
  34 
  35 public class ThreadedMallocTestType {
  36   public static long memAlloc1;
  37   public static long memAlloc2;
  38   public static long memAlloc3;
  39 
  40   public static void main(String args[]) throws Exception {
  41     OutputAnalyzer output;
  42     final WhiteBox wb = WhiteBox.getWhiteBox();
  43 
  44     // Grab my own PID
  45     String pid = Integer.toString(ProcessTools.getProcessId());
  46     ProcessBuilder pb = new ProcessBuilder();
  47 
  48     Thread allocThread = new Thread() {
  49       public void run() {
  50         // Alloc memory using the WB api
  51         memAlloc1 = wb.NMTMalloc(128 * 1024);
  52         memAlloc2 = wb.NMTMalloc(256 * 1024);
  53         memAlloc3 = wb.NMTMalloc(512 * 1024);
  54       }
  55     };
  56 
  57     allocThread.start();
  58     allocThread.join();
  59 
  60     // Use WB API to ensure that all data has been merged before we continue
  61     if (!wb.NMTWaitForDataMerge()) {
  62       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  63     }
  64 
  65     // Run 'jcmd <pid> VM.native_memory summary'
  66     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
  67     output = new OutputAnalyzer(pb.start());
  68     output.shouldContain("Test (reserved=896KB, committed=896KB)");
  69 
  70     Thread freeThread = new Thread() {
  71       public void run() {
  72         // Free the memory allocated by NMTMalloc
  73         wb.NMTFree(memAlloc1);
  74         wb.NMTFree(memAlloc2);
  75         wb.NMTFree(memAlloc3);
  76       }
  77     };
  78 
  79     freeThread.start();
  80     freeThread.join();
  81 
  82     // Use WB API to ensure that all data has been merged before we continue
  83     if (!wb.NMTWaitForDataMerge()) {
  84       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  85     }
  86 
  87     output = new OutputAnalyzer(pb.start());
  88     output.shouldNotContain("Test (reserved=");
  89   }
  90 }