SummarySanityCheck.java revision 11833:1cbffa2beba6 
1/*
2 * Copyright (c) 2013, 2016, 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 /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 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+WhiteBoxAPI SummarySanityCheck
35 */
36
37import jdk.test.lib.process.ProcessTools;
38import jdk.test.lib.process.OutputAnalyzer;
39import jdk.test.lib.JDKToolFinder;
40
41import java.util.regex.Matcher;
42import java.util.regex.Pattern;
43import sun.hotspot.WhiteBox;
44
45public class SummarySanityCheck {
46
47  private static String jcmdout;
48  public static void main(String args[]) throws Exception {
49    // Grab my own PID
50    String pid = Long.toString(ProcessTools.getProcessId());
51
52    ProcessBuilder pb = new ProcessBuilder();
53
54    // Run  'jcmd <pid> VM.native_memory summary scale=KB'
55    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=KB"});
56    OutputAnalyzer output = new OutputAnalyzer(pb.start());
57
58    jcmdout = output.getOutput();
59    // Split by '-' to get the 'groups'
60    String[] lines = jcmdout.split("\n");
61
62    if (lines.length == 0) {
63      throwTestException("Failed to parse jcmd output");
64    }
65
66    int totalCommitted = 0, totalReserved = 0;
67    int totalCommittedSum = 0, totalReservedSum = 0;
68
69    // Match '- <mtType> (reserved=<reserved>KB, committed=<committed>KB)
70    Pattern mtTypePattern = Pattern.compile("-\\s+(?<typename>[\\w\\s]+)\\(reserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB\\)");
71    // Match 'Total: reserved=<reserved>KB, committed=<committed>KB'
72    Pattern totalMemoryPattern = Pattern.compile("Total\\:\\sreserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB");
73
74    for (int i = 0; i < lines.length; i++) {
75      if (lines[i].startsWith("Total")) {
76        Matcher totalMemoryMatcher = totalMemoryPattern.matcher(lines[i]);
77
78        if (totalMemoryMatcher.matches()) {
79          totalCommitted = Integer.parseInt(totalMemoryMatcher.group("committed"));
80          totalReserved = Integer.parseInt(totalMemoryMatcher.group("reserved"));
81        } else {
82          throwTestException("Failed to match the expected groups in 'Total' memory part");
83        }
84      } else if (lines[i].startsWith("-")) {
85        Matcher typeMatcher = mtTypePattern.matcher(lines[i]);
86        if (typeMatcher.matches()) {
87          int typeCommitted = Integer.parseInt(typeMatcher.group("committed"));
88          int typeReserved = Integer.parseInt(typeMatcher.group("reserved"));
89
90          // Make sure reserved is always less or equals
91          if (typeCommitted > typeReserved) {
92            throwTestException("Committed (" + typeCommitted + ") was more than Reserved ("
93                + typeReserved + ") for mtType: " + typeMatcher.group("typename"));
94          }
95
96          // Add to total and compare them in the end
97          totalCommittedSum += typeCommitted;
98          totalReservedSum += typeReserved;
99        } else {
100          throwTestException("Failed to match the group on line " + i);
101        }
102      }
103    }
104
105    // See if they add up correctly, rounding is a problem so make sure we're within +/- 8KB
106    int committedDiff = totalCommitted - totalCommittedSum;
107    if (committedDiff > 8 || committedDiff < -8) {
108      throwTestException("Total committed (" + totalCommitted + ") did not match the summarized committed (" + totalCommittedSum + ")" );
109    }
110
111    int reservedDiff = totalReserved - totalReservedSum;
112    if (reservedDiff > 8 || reservedDiff < -8) {
113      throwTestException("Total reserved (" + totalReserved + ") did not match the summarized reserved (" + totalReservedSum + ")" );
114    }
115  }
116
117  private static void throwTestException(String reason) throws Exception {
118      throw new Exception(reason + " . Stdout is :\n" + jcmdout);
119  }
120}
121