1 /*
   2  * Copyright (c) 2014, 2015, 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 /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @build sun.hotspot.WhiteBox
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest
  34  *
  35  */
  36 
  37 import jdk.test.lib.process.ProcessTools;
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 import jdk.test.lib.JDKToolFinder;
  40 
  41 import sun.hotspot.WhiteBox;
  42 
  43 public class MallocRoundingReportTest {
  44     private static long K = 1024;
  45 
  46     public static void main(String args[]) throws Exception {
  47         OutputAnalyzer output;
  48         WhiteBox wb = WhiteBox.getWhiteBox();
  49 
  50         // Grab my own PID
  51         String pid = Long.toString(ProcessTools.getProcessId());
  52         ProcessBuilder pb = new ProcessBuilder();
  53 
  54         long[] additionalBytes = {0, 1, 512, 650};
  55         long[] kByteSize = {1024, 2048};
  56         long mallocd_total = 0;
  57         for ( int i = 0; i < kByteSize.length; i++)
  58         {
  59             for (int j = 0; j < (additionalBytes.length); j++) {
  60                 long curKB = kByteSize[i] + additionalBytes[j];
  61                 // round up/down to the nearest KB to match NMT reporting
  62                 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K;
  63                 // Use WB API to alloc and free with the mtTest type
  64                 mallocd_total = wb.NMTMalloc(curKB);
  65                 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
  66                 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB
  67                 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)");
  68 
  69                 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
  70                 output = new OutputAnalyzer(pb.start());
  71                 output.shouldContain(expectedOut);
  72 
  73                 wb.NMTFree(mallocd_total);
  74                 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
  75                 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
  76                 output = new OutputAnalyzer(pb.start());
  77                 output.shouldNotContain("Test (reserved=");
  78             }
  79         }
  80     }
  81 }