1 /* |
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2 * Copyright (c) 2010, 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 import java.util.logging.*; |
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25 |
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26 public class LoggerWeakRefLeak extends SimpleApplication { |
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27 // The test driver script will allow this program to run until we |
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28 // reach DEFAULT_LOOP_TIME or a decrease in instance counts is |
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29 // observed. For these particular WeakReference leaks, the count |
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30 // was always observed to be increasing so if we get a decreasing |
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31 // count, then the leaks are fixed in the bits being tested. |
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32 // Two minutes has been enough time to observe a decrease in |
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33 // fixed bits on overloaded systems, but the test will likely |
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34 // finish more quickly. |
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35 public static int DEFAULT_LOOP_TIME = 120; // time is in seconds |
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36 |
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37 // execute the LoggerWeakRefLeak app work |
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38 public void doMyAppWork(String[] args) throws Exception { |
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39 int loop_time = 0; |
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40 int max_loop_time = DEFAULT_LOOP_TIME; |
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41 |
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42 // args[0] is the port-file |
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43 if (args.length < 2) { |
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44 System.out.println("INFO: using default time of " |
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45 + max_loop_time + " seconds."); |
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46 } else { |
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47 try { |
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48 max_loop_time = Integer.parseInt(args[1]); |
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49 } catch (NumberFormatException nfe) { |
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50 throw new RuntimeException("Error: '" + args[1] |
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51 + "': is not a valid seconds value."); |
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52 } |
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53 } |
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54 |
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55 long count = 0; |
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56 int loggerCount = 0; |
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57 long now = 0; |
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58 long startTime = System.currentTimeMillis(); |
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59 |
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60 while (now < (startTime + (max_loop_time * 1000))) { |
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61 if ((count % 1000) == 0) { |
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62 // Print initial call count to let caller know that |
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63 // we're up and running and then periodically |
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64 System.out.println("INFO: call count = " + count); |
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65 } |
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66 |
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67 for (int i = 0; i < 100; i++) { |
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68 // This Logger call is leaking two different WeakReferences: |
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69 // - one in LogManager.LogNode |
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70 // - one in Logger.kids |
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71 java.util.logging.Logger.getLogger("logger-" + loggerCount); |
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72 count++; |
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73 if (++loggerCount >= 25000) { |
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74 // Limit the Logger namespace used by the test so |
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75 // the weak refs in LogManager.loggers that are |
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76 // being properly managed don't skew the counts |
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77 // by too much. |
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78 loggerCount = 0; |
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79 } |
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80 } |
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81 |
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82 try { |
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83 // delay for 1/10 of a second to avoid CPU saturation |
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84 Thread.sleep(100); |
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85 } catch (InterruptedException ie) { |
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86 // ignore any exceptions |
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87 } |
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88 |
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89 now = System.currentTimeMillis(); |
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90 } |
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91 |
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92 System.out.println("INFO: final loop count = " + count); |
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93 } |
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94 |
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95 public static void main(String[] args) throws Exception { |
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96 AnonLoggerWeakRefLeak myApp = new AnonLoggerWeakRefLeak(); |
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97 |
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98 SimpleApplication.setMyApp(myApp); |
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99 |
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100 SimpleApplication.main(args); |
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101 } |
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102 } |
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