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 /* @test |
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25 * @bug 8022584 |
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26 * @summary Some NetworkInterface methods can leak native memory |
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27 * @run main/othervm/timeout=700 MemLeakTest |
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28 */ |
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29 |
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30 /* Note: the test can cause a memory leak that's why othervm option is required |
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31 */ |
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32 |
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33 import java.io.BufferedReader; |
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34 import java.io.FileReader; |
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35 import java.net.NetworkInterface; |
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36 import java.net.SocketException; |
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37 import java.util.Collection; |
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38 import java.util.Collections; |
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39 |
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40 public class MemLeakTest { |
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41 |
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42 /** |
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43 * Memory leak is assumed, if application consumes more than specified amount of memory during its execution. |
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44 * The number is given in Kb. |
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45 */ |
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46 private static final long MEM_LEAK_THRESHOLD = 32 * 1024; // 32Mb |
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47 |
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48 public static void main(String[] args) |
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49 throws Exception { |
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50 |
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51 if (!System.getProperty("os.name").equals("Linux")) { |
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52 System.out.println("Test only runs on Linux"); |
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53 return; |
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54 } |
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55 |
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56 // warm up |
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57 accessNetInterfaces(3); |
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58 |
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59 long vMemBefore = getVMemSize(); |
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60 accessNetInterfaces(500_000); |
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61 long vMemAfter = getVMemSize(); |
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62 |
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63 long vMemDelta = vMemAfter - vMemBefore; |
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64 if (vMemDelta > MEM_LEAK_THRESHOLD) { |
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65 throw new Exception("FAIL: Virtual memory usage increased by " + vMemDelta + "Kb " + |
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66 "(greater than " + MEM_LEAK_THRESHOLD + "Kb)"); |
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67 } |
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68 |
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69 System.out.println("PASS: Virtual memory usage increased by " + vMemDelta + "Kb " + |
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70 "(not greater than " + MEM_LEAK_THRESHOLD + "Kb)"); |
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71 } |
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72 |
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73 private static void accessNetInterfaces(int times) { |
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74 try { |
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75 Collection<NetworkInterface> interfaces = |
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76 Collections.list(NetworkInterface.getNetworkInterfaces()); |
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77 for (int i = 0; i != times; ++i) { |
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78 for (NetworkInterface netInterface : interfaces) { |
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79 netInterface.getMTU(); |
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80 netInterface.isLoopback(); |
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81 netInterface.isUp(); |
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82 netInterface.isPointToPoint(); |
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83 netInterface.supportsMulticast(); |
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84 } |
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85 } |
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86 } catch (SocketException ignore) {} |
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87 } |
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88 |
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89 /** |
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90 * Returns size of virtual memory allocated to the process in Kb. |
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91 * Linux specific. On other platforms and in case of any errors returns 0. |
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92 */ |
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93 private static long getVMemSize() { |
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94 |
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95 // Refer to the Linux proc(5) man page for details about /proc/self/stat file |
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96 // |
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97 // In short, this file contains status information about the current process |
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98 // written in one line. The fields are separated with spaces. |
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99 // The 23rd field is defined as 'vsize %lu Virtual memory size in bytes' |
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100 |
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101 try (FileReader fileReader = new FileReader("/proc/self/stat"); |
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102 BufferedReader bufferedReader = new BufferedReader(fileReader)) { |
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103 String line = bufferedReader.readLine(); |
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104 return Long.parseLong(line.split(" ")[22]) / 1024; |
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105 } catch (Exception ignore) {} |
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106 return 0; |
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107 } |
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108 } |
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