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 Reserve/Commit/Uncommit/Release of virtual memory and that we track it correctly

    27  * @key nmt jcmd

    28  * @library /testlibrary /testlibrary/whitebox

    29  * @build VirtualAllocTestType

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType

    32  */

    33 

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

    35 import sun.hotspot.WhiteBox;

    36 

    37 public class VirtualAllocTestType {

    38 

    39   public static WhiteBox wb = WhiteBox.getWhiteBox();

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

    41     OutputAnalyzer output;

    42     long commitSize = 128 * 1024;

    43     long reserveSize = 256 * 1024;

    44     long addr;

    45 

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

    47     ProcessBuilder pb = new ProcessBuilder();

    48 

    49     addr = wb.NMTReserveMemory(reserveSize);

    50     mergeData();

    51 

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

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

    54     output.shouldContain("Test (reserved=256KB, committed=0KB)");

    55     output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");

    56 

    57     wb.NMTCommitMemory(addr, commitSize);

    58 

    59     mergeData();

    60 

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

    62     output.shouldContain("Test (reserved=256KB, committed=128KB)");

    63     output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");

    64 

    65     wb.NMTUncommitMemory(addr, commitSize);

    66 

    67     mergeData();

    68 

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

    70     output.shouldContain("Test (reserved=256KB, committed=0KB)");

    71     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");

    72 

    73     wb.NMTReleaseMemory(addr, reserveSize);

    74 

    75     mergeData();

    76 

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

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

    79     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");

    80   }

    81 

    82   public static void mergeData() throws Exception {

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

    84     if (!wb.NMTWaitForDataMerge()) {

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

    86     }

    87   }

    88 }