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  * @build VirtualAllocTestType
  30  * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType
  31  */
  32 
  33 import com.oracle.java.testlibrary.*;
  34 import sun.hotspot.WhiteBox;
  35 
  36 public class VirtualAllocTestType {
  37 
  38   public static WhiteBox wb = WhiteBox.getWhiteBox();
  39   public static void main(String args[]) throws Exception {
  40     OutputAnalyzer output;
  41     long commitSize = 128 * 1024;
  42     long reserveSize = 256 * 1024;
  43     long addr;
  44 
  45     String pid = Integer.toString(ProcessTools.getProcessId());
  46     ProcessBuilder pb = new ProcessBuilder();
  47 
  48     boolean has_nmt_detail = wb.NMTIsDetailSupported();
  49     if (has_nmt_detail) {
  50       System.out.println("NMT detail support detected.");
  51     } else {
  52       System.out.println("NMT detail support not detected.");
  53     }
  54 
  55     addr = wb.NMTReserveMemory(reserveSize);
  56     mergeData();
  57     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
  58 
  59     output = new OutputAnalyzer(pb.start());
  60     output.shouldContain("Test (reserved=256KB, committed=0KB)");
  61     if (has_nmt_detail) {
  62       output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");
  63     }
  64 
  65     wb.NMTCommitMemory(addr, commitSize);
  66 
  67     mergeData();
  68 
  69     output = new OutputAnalyzer(pb.start());
  70     output.shouldContain("Test (reserved=256KB, committed=128KB)");
  71     if (has_nmt_detail) {
  72       output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");
  73     }
  74 
  75     wb.NMTUncommitMemory(addr, commitSize);
  76 
  77     mergeData();
  78 
  79     output = new OutputAnalyzer(pb.start());
  80     output.shouldContain("Test (reserved=256KB, committed=0KB)");
  81     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");
  82 
  83     wb.NMTReleaseMemory(addr, reserveSize);
  84     mergeData();
  85 
  86     output = new OutputAnalyzer(pb.start());
  87     output.shouldNotContain("Test (reserved=");
  88     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");
  89   }
  90 
  91   public static void mergeData() throws Exception {
  92     // Use WB API to ensure that all data has been merged before we continue
  93     if (!wb.NMTWaitForDataMerge()) {
  94       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  95     }
  96   }
  97 }