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 reserve/commit/uncommit/release of virtual memory and that we track it correctly

    27  * @key nmt jcmd

    28  * @library /testlibrary /testlibrary/whitebox

    29  * @ignore

    30  * @build VirtualAllocCommitUncommitRecommit

    31  * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

    33  *

    34  */

    35 

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

    37 

    38 import sun.hotspot.WhiteBox;

    39 

    40 public class VirtualAllocCommitUncommitRecommit {

    41 

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

    43 

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

    45         OutputAnalyzer output;

    46         long commitSize = 4 * 1024; // 4KB

    47         long reserveSize = 1024 * 1024; // 1024KB

    48         long addr;

    49 

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

    51         ProcessBuilder pb = new ProcessBuilder();

    52 

    53         boolean has_nmt_detail = wb.NMTIsDetailSupported();

    54         if (has_nmt_detail) {

    55             System.out.println("NMT detail support detected.");

    56         } else {

    57             System.out.println("NMT detail support not detected.");

    58         }

    59 

    60         // reserve

    61         addr = wb.NMTReserveMemory(reserveSize);

    62         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid,

    63                 "VM.native_memory", "detail" });

    64 

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

    66         output.shouldContain("Test (reserved=1024KB, committed=0KB)");

    67         if (has_nmt_detail) {

    68             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

    69                     + Long.toHexString(addr + reserveSize)

    70                     + "\\] reserved 1024KB for Test");

    71         }

    72 

    73         long addrA = addr;

    74         long addrB = addr + commitSize;

    75         long addrC = addr + (2 * commitSize);

    76         long addrD = addr + (3 * commitSize);

    77         long addrE = addr + (4 * commitSize);

    78         long addrF = addr + (5 * commitSize);

    79 

    80         // commit ABCD

    81         wb.NMTCommitMemory(addrA, commitSize);

    82         wb.NMTCommitMemory(addrB, commitSize);

    83         wb.NMTCommitMemory(addrC, commitSize);

    84         wb.NMTCommitMemory(addrD, commitSize);

    85 

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

    87         output.shouldContain("Test (reserved=1024KB, committed=16KB)");

    88 

    89         if (has_nmt_detail) {

    90             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

    91                     + Long.toHexString(addr + reserveSize)

    92                     + "\\] reserved 1024KB for Test");

    93         }

    94         // uncommit BC

    95         wb.NMTUncommitMemory(addrB, commitSize);

    96         wb.NMTUncommitMemory(addrC, commitSize);

    97 

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

    99         output.shouldContain("Test (reserved=1024KB, committed=8KB)");

   100 

   101         if (has_nmt_detail) {

   102             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   103                     + Long.toHexString(addr + reserveSize)

   104                     + "\\] reserved 1024KB for Test");

   105         }

   106 

   107         // commit EF

   108         wb.NMTCommitMemory(addrE, commitSize);

   109         wb.NMTCommitMemory(addrF, commitSize);

   110 

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

   112         output.shouldContain("Test (reserved=1024KB, committed=16KB)");

   113         if (has_nmt_detail) {

   114             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   115                     + Long.toHexString(addr + reserveSize)

   116                     + "\\] reserved 1024KB for Test");

   117         }

   118 

   119         // uncommit A

   120         wb.NMTUncommitMemory(addrA, commitSize);

   121 

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

   123         output.shouldContain("Test (reserved=1024KB, committed=12KB)");

   124         if (has_nmt_detail) {

   125             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   126                     + Long.toHexString(addr + reserveSize)

   127                     + "\\] reserved 1024KB for Test");

   128         }

   129 

   130         // commit ABC

   131         wb.NMTCommitMemory(addrA, commitSize);

   132         wb.NMTCommitMemory(addrB, commitSize);

   133         wb.NMTCommitMemory(addrC, commitSize);

   134 

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

   136         output.shouldContain("Test (reserved=1024KB, committed=24KB)");

   137         if (has_nmt_detail) {

   138             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   139                     + Long.toHexString(addr + reserveSize)

   140                     + "\\] reserved 1024KB for Test");

   141         }

   142 

   143         // uncommit ABCDEF

   144         wb.NMTUncommitMemory(addrA, commitSize);

   145         wb.NMTUncommitMemory(addrB, commitSize);

   146         wb.NMTUncommitMemory(addrC, commitSize);

   147         wb.NMTUncommitMemory(addrD, commitSize);

   148         wb.NMTUncommitMemory(addrE, commitSize);

   149         wb.NMTUncommitMemory(addrF, commitSize);

   150 

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

   152         output.shouldContain("Test (reserved=1024KB, committed=0KB)");

   153         if (has_nmt_detail) {

   154             output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   155                     + Long.toHexString(addr + reserveSize)

   156                     + "\\] reserved 1024KB for Test");

   157         }

   158 

   159         // release

   160         wb.NMTReleaseMemory(addr, reserveSize);

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

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

   163         output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"

   164                 + Long.toHexString(addr + reserveSize) + "\\] reserved");

   165     }

   166 }