1 /*
   2  * Copyright (c) 2013, 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  * @key nmt jcmd
  27  * @summary Sanity check the output of NMT
  28  * @library /testlibrary /test/lib
  29  * @modules java.base/sun.misc
  30  *          java.management
  31  * @build SummarySanityCheck
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+WhiteBoxAPI SummarySanityCheck
  35  */
  36 
  37 import jdk.test.lib.*;
  38 
  39 import java.util.regex.Matcher;
  40 import java.util.regex.Pattern;
  41 import sun.hotspot.WhiteBox;
  42 
  43 public class SummarySanityCheck {
  44 
  45   private static String jcmdout;
  46   public static void main(String args[]) throws Exception {
  47     // Grab my own PID
  48     String pid = Integer.toString(ProcessTools.getProcessId());
  49 
  50     ProcessBuilder pb = new ProcessBuilder();
  51 
  52     // Run  'jcmd <pid> VM.native_memory summary scale=KB'
  53     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=KB"});
  54     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  55 
  56     jcmdout = output.getOutput();
  57     // Split by '-' to get the 'groups'
  58     String[] lines = jcmdout.split("\n");
  59 
  60     if (lines.length == 0) {
  61       throwTestException("Failed to parse jcmd output");
  62     }
  63 
  64     int totalCommitted = 0, totalReserved = 0;
  65     int totalCommittedSum = 0, totalReservedSum = 0;
  66 
  67     // Match '- <mtType> (reserved=<reserved>KB, committed=<committed>KB)
  68     Pattern mtTypePattern = Pattern.compile("-\\s+(?<typename>[\\w\\s]+)\\(reserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB\\)");
  69     // Match 'Total: reserved=<reserved>KB, committed=<committed>KB'
  70     Pattern totalMemoryPattern = Pattern.compile("Total\\:\\sreserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB");
  71 
  72     for (int i = 0; i < lines.length; i++) {
  73       if (lines[i].startsWith("Total")) {
  74         Matcher totalMemoryMatcher = totalMemoryPattern.matcher(lines[i]);
  75 
  76         if (totalMemoryMatcher.matches()) {
  77           totalCommitted = Integer.parseInt(totalMemoryMatcher.group("committed"));
  78           totalReserved = Integer.parseInt(totalMemoryMatcher.group("reserved"));
  79         } else {
  80           throwTestException("Failed to match the expected groups in 'Total' memory part");
  81         }
  82       } else if (lines[i].startsWith("-")) {
  83         Matcher typeMatcher = mtTypePattern.matcher(lines[i]);
  84         if (typeMatcher.matches()) {
  85           int typeCommitted = Integer.parseInt(typeMatcher.group("committed"));
  86           int typeReserved = Integer.parseInt(typeMatcher.group("reserved"));
  87 
  88           // Make sure reserved is always less or equals
  89           if (typeCommitted > typeReserved) {
  90             throwTestException("Committed (" + typeCommitted + ") was more than Reserved ("
  91                 + typeReserved + ") for mtType: " + typeMatcher.group("typename"));
  92           }
  93 
  94           // Add to total and compare them in the end
  95           totalCommittedSum += typeCommitted;
  96           totalReservedSum += typeReserved;
  97         } else {
  98           throwTestException("Failed to match the group on line " + i);
  99         }
 100       }
 101     }
 102 
 103     // See if they add up correctly, rounding is a problem so make sure we're within +/- 8KB
 104     int committedDiff = totalCommitted - totalCommittedSum;
 105     if (committedDiff > 8 || committedDiff < -8) {
 106       throwTestException("Total committed (" + totalCommitted + ") did not match the summarized committed (" + totalCommittedSum + ")" );
 107     }
 108 
 109     int reservedDiff = totalReserved - totalReservedSum;
 110     if (reservedDiff > 8 || reservedDiff < -8) {
 111       throwTestException("Total reserved (" + totalReserved + ") did not match the summarized reserved (" + totalReservedSum + ")" );
 112     }
 113   }
 114 
 115   private static void throwTestException(String reason) throws Exception {
 116       throw new Exception(reason + " . Stdout is :\n" + jcmdout);
 117   }
 118 }