1 /* |
1 /* |
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 2011, 2013 Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
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 |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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 |
20 * or visit www.oracle.com if you need additional information or have any |
21 * questions. |
21 * questions. |
22 */ |
22 */ |
23 |
23 |
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24 import java.io.*; |
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25 |
24 public class RetransformBigClassApp { |
26 public class RetransformBigClassApp { |
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27 /** |
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28 * Memory leak is assumed, if application consumes more than specified amount of memory during its execution. |
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29 * The number is given in Kb. |
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30 */ |
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31 private static final long MEM_LEAK_THRESHOLD = 32 * 1024; // 32Mb |
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32 |
25 public static void main(String[] args) throws Exception { |
33 public static void main(String[] args) throws Exception { |
26 System.out.println("Creating instance of " + |
34 System.out.println("Creating instance of " + |
27 RetransformBigClassAgent.clz); |
35 RetransformBigClassAgent.clz); |
28 RetransformBigClassAgent.clz.newInstance(); |
36 RetransformBigClassAgent.clz.newInstance(); |
29 |
37 |
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38 long vMemBefore = getVMemSize(); |
30 int count = 0; |
39 int count = 0; |
31 while (!RetransformBigClassAgent.doneRetransforming) { |
40 while (!RetransformBigClassAgent.doneRetransforming) { |
32 System.out.println("App loop count: " + ++count); |
41 System.out.println("App loop count: " + ++count); |
33 try { |
42 try { |
34 Thread.sleep(10 * 1000); |
43 Thread.sleep(10 * 1000); |
35 } catch (InterruptedException ie) { |
44 } catch (InterruptedException ie) { |
36 } |
45 } |
37 } |
46 } |
38 System.out.println("App looped " + count + " times."); |
47 System.out.println("App looped " + count + " times."); |
39 |
48 |
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49 long vMemAfter = getVMemSize(); |
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50 if (vMemBefore == 0 || vMemAfter == 0) { |
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51 System.err.println("WARNING: Cannot perform memory leak detection on this OS"); |
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52 } else { |
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53 long vMemDelta = vMemAfter - vMemBefore; |
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54 if (vMemDelta > MEM_LEAK_THRESHOLD) { |
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55 System.err.println("FAIL: Virtual memory usage increased by " + vMemDelta + "Kb " + |
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56 "(greater than " + MEM_LEAK_THRESHOLD + "Kb)"); |
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57 System.exit(1); |
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58 } |
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59 System.err.println("PASS: Virtual memory usage increased by " + vMemDelta + "Kb " + |
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60 "(not greater than " + MEM_LEAK_THRESHOLD + "Kb)"); |
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61 } |
40 System.exit(0); |
62 System.exit(0); |
41 } |
63 } |
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64 |
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65 /** |
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66 * Return size of virtual memory allocated to the process in Kb. |
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67 * Linux specific. On other platforms and in case of any errors return 0. |
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68 */ |
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69 private static long getVMemSize() { |
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70 |
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71 // Refer to the Linux proc(5) man page for details about /proc/self/stat file |
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72 // |
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73 // In short, this file contains status information about the current process |
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74 // written in one line. The fields are separated with spaces. |
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75 // The 23rd field is defined as 'vsize %lu Virtual memory size in bytes' |
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76 |
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77 try (FileReader fileReader = new FileReader("/proc/self/stat"); |
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78 BufferedReader bufferedReader = new BufferedReader(fileReader)) { |
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79 String line = bufferedReader.readLine(); |
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80 return Long.parseLong(line.split(" ")[22]) / 1024; |
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81 } catch (Exception ex) {} |
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82 return 0; |
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83 } |
42 } |
84 } |