1 /*
   2  * Copyright (c) 2013, 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  * @key nmt jcmd
  27  * @summary Sanity check the output of NMT
  28  * @library /testlibrary /testlibrary/whitebox
  29  * @build SummarySanityCheck
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  32  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+WhiteBoxAPI SummarySanityCheck
  33  */
  34 
  35 import com.oracle.java.testlibrary.*;
  36 
  37 import java.util.regex.Matcher;
  38 import java.util.regex.Pattern;
  39 import sun.hotspot.WhiteBox;
  40 
  41 public class SummarySanityCheck {
  42 
  43   private static String jcmdout;
  44   public static void main(String args[]) throws Exception {
  45     // Grab my own PID
  46     String pid = Integer.toString(ProcessTools.getProcessId());
  47 
  48     ProcessBuilder pb = new ProcessBuilder();
  49 
  50     // Run  'jcmd <pid> VM.native_memory summary scale=KB'
  51     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=KB"});
  52     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  53 
  54     jcmdout = output.getOutput();
  55     // Split by '-' to get the 'groups'
  56     String[] lines = jcmdout.split("\n");
  57 
  58     if (lines.length == 0) {
  59       throwTestException("Failed to parse jcmd output");
  60     }
  61 
  62     int totalCommitted = 0, totalReserved = 0;
  63     int totalCommittedSum = 0, totalReservedSum = 0;
  64 
  65     // Match '- <mtType> (reserved=<reserved>KB, committed=<committed>KB)
  66     Pattern mtTypePattern = Pattern.compile("-\\s+(?<typename>[\\w\\s]+)\\(reserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB\\)");
  67     // Match 'Total: reserved=<reserved>KB, committed=<committed>KB'
  68     Pattern totalMemoryPattern = Pattern.compile("Total\\:\\sreserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB");
  69 
  70     for (int i = 0; i < lines.length; i++) {
  71       if (lines[i].startsWith("Total")) {
  72         Matcher totalMemoryMatcher = totalMemoryPattern.matcher(lines[i]);
  73 
  74         if (totalMemoryMatcher.matches()) {
  75           totalCommitted = Integer.parseInt(totalMemoryMatcher.group("committed"));
  76           totalReserved = Integer.parseInt(totalMemoryMatcher.group("reserved"));
  77         } else {
  78           throwTestException("Failed to match the expected groups in 'Total' memory part");
  79         }
  80       } else if (lines[i].startsWith("-")) {
  81         Matcher typeMatcher = mtTypePattern.matcher(lines[i]);
  82         if (typeMatcher.matches()) {
  83           int typeCommitted = Integer.parseInt(typeMatcher.group("committed"));
  84           int typeReserved = Integer.parseInt(typeMatcher.group("reserved"));
  85 
  86           // Make sure reserved is always less or equals
  87           if (typeCommitted > typeReserved) {
  88             throwTestException("Committed (" + typeCommitted + ") was more than Reserved ("
  89                 + typeReserved + ") for mtType: " + typeMatcher.group("typename"));
  90           }
  91 
  92           // Add to total and compare them in the end
  93           totalCommittedSum += typeCommitted;
  94           totalReservedSum += typeReserved;
  95         } else {
  96           throwTestException("Failed to match the group on line " + i);
  97         }
  98       }
  99     }
 100 
 101     // See if they add up correctly, rounding is a problem so make sure we're within +/- 8KB
 102     int committedDiff = totalCommitted - totalCommittedSum;
 103     if (committedDiff > 8 || committedDiff < -8) {
 104       throwTestException("Total committed (" + totalCommitted + ") did not match the summarized committed (" + totalCommittedSum + ")" );
 105     }
 106 
 107     int reservedDiff = totalReserved - totalReservedSum;
 108     if (reservedDiff > 8 || reservedDiff < -8) {
 109       throwTestException("Total reserved (" + totalReserved + ") did not match the summarized reserved (" + totalReservedSum + ")" );
 110     }
 111   }
 112 
 113   private static void throwTestException(String reason) throws Exception {
 114       throw new Exception(reason + " . Stdout is :\n" + jcmdout);
 115   }
 116 }