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7977
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @key nmt jcmd
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27 * @summary Sanity check the output of NMT
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28 * @library /testlibrary
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29 * @run compile -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI SummarySanityCheck.java
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30 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+WhiteBoxAPI SummarySanityCheck
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31 */
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32
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33 import com.oracle.java.testlibrary.*;
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34
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35 import java.util.regex.Matcher;
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36 import java.util.regex.Pattern;
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37 import sun.hotspot.WhiteBox;
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38
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39 public class SummarySanityCheck {
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40
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41 private static String jcmdout;
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42 public static void main(String args[]) throws Exception {
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43 // Grab my own PID
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44 String pid = Integer.toString(ProcessTools.getProcessId());
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45
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46 // Use WB API to ensure that all data has been merged before we continue
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47 if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {
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48 throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
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49 }
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50
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51 ProcessBuilder pb = new ProcessBuilder();
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52
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53 // Run 'jcmd <pid> VM.native_memory summary scale=KB'
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54 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=KB"});
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55 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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56
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57 jcmdout = output.getOutput();
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58 // Split by '-' to get the 'groups'
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59 String[] lines = jcmdout.split("\n");
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60
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61 if (lines.length == 0) {
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62 throwTestException("Failed to parse jcmd output");
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63 }
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64
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65 int totalCommitted = 0, totalReserved = 0;
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66 int totalCommittedSum = 0, totalReservedSum = 0;
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67
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68 // Match '- <mtType> (reserved=<reserved>KB, committed=<committed>KB)
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69 Pattern mtTypePattern = Pattern.compile("-\\s+(?<typename>[\\w\\s]+)\\(reserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB\\)");
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70 // Match 'Total: reserved=<reserved>KB, committed=<committed>KB'
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71 Pattern totalMemoryPattern = Pattern.compile("Total\\:\\s\\sreserved=(?<reserved>\\d+)KB,\\s\\scommitted=(?<committed>\\d+)KB");
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72
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73 for (int i = 0; i < lines.length; i++) {
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74 if (lines[i].startsWith("Total")) {
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75 Matcher totalMemoryMatcher = totalMemoryPattern.matcher(lines[i]);
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76
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77 if (totalMemoryMatcher.matches() && totalMemoryMatcher.groupCount() == 2) {
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78 totalCommitted = Integer.parseInt(totalMemoryMatcher.group("committed"));
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79 totalReserved = Integer.parseInt(totalMemoryMatcher.group("reserved"));
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80 } else {
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81 throwTestException("Failed to match the expected groups in 'Total' memory part");
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82 }
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83 } else if (lines[i].startsWith("-")) {
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84 Matcher typeMatcher = mtTypePattern.matcher(lines[i]);
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85 if (typeMatcher.matches()) {
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86 int typeCommitted = Integer.parseInt(typeMatcher.group("committed"));
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87 int typeReserved = Integer.parseInt(typeMatcher.group("reserved"));
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88
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89 // Make sure reserved is always less or equals
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90 if (typeCommitted > typeReserved) {
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91 throwTestException("Committed (" + typeCommitted + ") was more than Reserved ("
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92 + typeReserved + ") for mtType: " + typeMatcher.group("typename"));
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93 }
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94
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95 // Add to total and compare them in the end
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96 totalCommittedSum += typeCommitted;
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97 totalReservedSum += typeReserved;
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98 } else {
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99 throwTestException("Failed to match the group on line " + i);
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100 }
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101 }
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102 }
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103
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104 // See if they add up correctly, rounding is a problem so make sure we're within +/- 8KB
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105 int committedDiff = totalCommitted - totalCommittedSum;
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106 if (committedDiff > 8 || committedDiff < -8) {
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107 throwTestException("Total committed (" + totalCommitted + ") did not match the summarized committed (" + totalCommittedSum + ")" );
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108 }
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109
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110 int reservedDiff = totalReserved - totalReservedSum;
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111 if (reservedDiff > 8 || reservedDiff < -8) {
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112 throwTestException("Total reserved (" + totalReserved + ") did not match the summarized reserved (" + totalReservedSum + ")" );
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113 }
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114 }
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115
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116 private static void throwTestException(String reason) throws Exception {
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117 throw new Exception(reason + " . Stdout is :\n" + jcmdout);
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118 }
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119 }
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