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     boolean has_nmt_detail = wb.NMTIsDetailSupported();
  50     if (has_nmt_detail) {
  51       System.out.println("NMT detail support detected.");
  52     } else {
  53       System.out.println("NMT detail support not detected.");
  54     }
  55 
  56     addr = wb.NMTReserveMemory(reserveSize);
  57     mergeData();
  58     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
  59 
  60     output = new OutputAnalyzer(pb.start());
  61     output.shouldContain("Test (reserved=256KB, committed=0KB)");
  62     if (has_nmt_detail) {
  63       output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");
  64     }
  65 
  66     wb.NMTCommitMemory(addr, commitSize);
  67 
  68     mergeData();
  69 
  70     output = new OutputAnalyzer(pb.start());
  71     output.shouldContain("Test (reserved=256KB, committed=128KB)");
  72     if (has_nmt_detail) {
  73       output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");
  74     }
  75 
  76     wb.NMTUncommitMemory(addr, commitSize);
  77 
  78     mergeData();
  79 
  80     output = new OutputAnalyzer(pb.start());
  81     output.shouldContain("Test (reserved=256KB, committed=0KB)");
  82     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");
  83 
  84     wb.NMTReleaseMemory(addr, reserveSize);
  85     mergeData();
  86 
  87     output = new OutputAnalyzer(pb.start());
  88     output.shouldNotContain("Test (reserved=");
  89     output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");
  90   }
  91 
  92   public static void mergeData() throws Exception {
  93     // Use WB API to ensure that all data has been merged before we continue
  94     if (!wb.NMTWaitForDataMerge()) {
  95       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  96     }
  97   }
  98 }