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 }