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  * @summary Test consistency of NMT by leaking a few select allocations of the Test type and then verify visibility with jcmd
  27  * @key nmt jcmd
  28  * @library /testlibrary /testlibrary/whitebox
  29  * @build MallocTestType
  30  * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTestType
  31  */
  32 
  33 import com.oracle.java.testlibrary.*;
  34 import sun.hotspot.WhiteBox;
  35 
  36 public class MallocTestType {
  37 
  38   public static void main(String args[]) throws Exception {
  39     OutputAnalyzer output;
  40     WhiteBox wb = WhiteBox.getWhiteBox();
  41 
  42     // Grab my own PID
  43     String pid = Integer.toString(ProcessTools.getProcessId());
  44     ProcessBuilder pb = new ProcessBuilder();
  45 
  46     // Use WB API to alloc and free with the mtTest type
  47     long memAlloc3 = wb.NMTMalloc(128 * 1024);
  48     long memAlloc2 = wb.NMTMalloc(256 * 1024);
  49     wb.NMTFree(memAlloc3);
  50     long memAlloc1 = wb.NMTMalloc(512 * 1024);
  51     wb.NMTFree(memAlloc2);
  52 
  53     // Use WB API to ensure that all data has been merged before we continue
  54     if (!wb.NMTWaitForDataMerge()) {
  55       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  56     }
  57 
  58     // Run 'jcmd <pid> VM.native_memory summary'
  59     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
  60     output = new OutputAnalyzer(pb.start());
  61     output.shouldContain("Test (reserved=512KB, committed=512KB)");
  62 
  63     // Free the memory allocated by NMTAllocTest
  64     wb.NMTFree(memAlloc1);
  65 
  66     // Use WB API to ensure that all data has been merged before we continue
  67     if (!wb.NMTWaitForDataMerge()) {
  68       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  69     }
  70     output = new OutputAnalyzer(pb.start());
  71     output.shouldNotContain("Test (reserved=");
  72   }
  73 }