1 /*

     2  * Copyright (c) 2013, 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

    29  * @run compile -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI AllocTestType.java

    30  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail AllocTestType

    31  */

    32 

    33 import com.oracle.java.testlibrary.*;

    34 import sun.hotspot.WhiteBox;

    35 

    36 public class AllocTestType {

    37 

    38   public static void main(String args[]) throws Exception {

    39     OutputAnalyzer output;

    40 

    41     // Grab my own PID

    42     String pid = Integer.toString(ProcessTools.getProcessId());

    43     ProcessBuilder pb = new ProcessBuilder();

    44 

    45     // Use WB API to alloc with the mtTest type

    46     if (!WhiteBox.getWhiteBox().NMTAllocTest()) {

    47       throw new Exception("Call to WB API NMTAllocTest() failed");

    48     }

    49 

    50     // Use WB API to ensure that all data has been merged before we continue

    51     if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {

    52       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");

    53     }

    54 

    55     // Run 'jcmd <pid> VM.native_memory summary'

    56     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});

    57     output = new OutputAnalyzer(pb.start());

    58     output.shouldContain("Test (reserved=512KB, committed=512KB)");

    59 

    60     // Free the memory allocated by NMTAllocTest

    61     if (!WhiteBox.getWhiteBox().NMTFreeTestMemory()) {

    62       throw new Exception("Call to WB API NMTFreeTestMemory() failed");

    63     }

    64 

    65     // Use WB API to ensure that all data has been merged before we continue

    66     if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {

    67       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");

    68     }

    69     output = new OutputAnalyzer(pb.start());

    70     output.shouldNotContain("Test (reserved=");

    71   }

    72 }