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 consistency of NMT by creating allocations of the Test type with various sizes and verifying visibility with jcmd
  27  * @key nmt jcmd
  28  * @library /testlibrary /../../test/lib
  29  * @build MallocRoundingReportTest
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest
  32  *
  33  */
  34 
  35 import com.oracle.java.testlibrary.*;
  36 
  37 import sun.hotspot.WhiteBox;
  38 
  39 public class MallocRoundingReportTest {
  40     private static long K = 1024;
  41 
  42     public static void main(String args[]) throws Exception {
  43         OutputAnalyzer output;
  44         WhiteBox wb = WhiteBox.getWhiteBox();
  45 
  46         // Grab my own PID
  47         String pid = Integer.toString(ProcessTools.getProcessId());
  48         ProcessBuilder pb = new ProcessBuilder();
  49 
  50         long[] additionalBytes = {0, 1, 512, 650};
  51         long[] kByteSize = {1024, 2048};
  52         long mallocd_total = 0;
  53         for ( int i = 0; i < kByteSize.length; i++)
  54         {
  55             for (int j = 0; j < (additionalBytes.length); j++) {
  56                 long curKB = kByteSize[i] + additionalBytes[j];
  57                 // round up/down to the nearest KB to match NMT reporting
  58                 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K;
  59                 // Use WB API to alloc and free with the mtTest type
  60                 mallocd_total = wb.NMTMalloc(curKB);
  61                 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
  62                 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB
  63                 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)");
  64 
  65                 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
  66                 output = new OutputAnalyzer(pb.start());
  67                 output.shouldContain(expectedOut);
  68 
  69                 wb.NMTFree(mallocd_total);
  70                 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
  71                 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
  72                 output = new OutputAnalyzer(pb.start());
  73                 output.shouldNotContain("Test (reserved=");
  74             }
  75         }
  76     }
  77 }