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1 /* |
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2 * Copyright (c) 2017, 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.lang.ClassLoader; |
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25 |
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26 public class TriggerResize extends ClassLoader |
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27 { |
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28 static private int[] DATA = // bytes for "class TestCase00000 {}" |
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29 { |
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30 -54, -2, -70, -66, 0, 0, 0, 52, 0, 13, // 0 |
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31 10, 0, 3, 0, 10, 7, 0, 11, 7, 0, // 10 |
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32 12, 1, 0, 6, 60, 105, 110, 105, 116, 62, // 20 |
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33 1, 0, 3, 40, 41, 86, 1, 0, 4, 67, // 30 |
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34 111, 100, 101, 1, 0, 15, 76, 105, 110, 101, // 40 |
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35 78, 117, 109, 98, 101, 114, 84, 97, 98, 108, // 50 |
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36 101, 1, 0, 10, 83, 111, 117, 114, 99, 101, // 60 |
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37 70, 105, 108, 101, 1, 0, 18, 84, 101, 115, // 70 |
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38 116, 67, 97, 115, 101, 48, 48, 48, 48, 48, // 80 |
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39 46, 106, 97, 118, 97, 12, 0, 4, 0, 5, // 90 |
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40 1, 0, 13, 84, 101, 115, 116, 67, 97, 115, // 100 |
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41 101, 48, 48, 48, 48, 48, 1, 0, 16, 106, // 110 |
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42 97, 118, 97, 47, 108, 97, 110, 103, 47, 79, // 120 |
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43 98, 106, 101, 99, 116, 0, 32, 0, 2, 0, // 130 |
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44 3, 0, 0, 0, 0, 0, 1, 0, 0, 0, // 140 |
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45 4, 0, 5, 0, 1, 0, 6, 0, 0, 0, // 150 |
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46 29, 0, 1, 0, 1, 0, 0, 0, 5, 42, // 160 |
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47 -73, 0, 1, -79, 0, 0, 0, 1, 0, 7, // 170 |
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48 0, 0, 0, 6, 0, 1, 0, 0, 0, 1, // 180 |
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49 0, 1, 0, 8, 0, 0, 0, 2, 0, 9 // 190 |
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50 }; |
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51 |
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52 static private int INDEX1 = 85; |
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53 static private int INDEX2 = 111; |
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54 static private int BASE = 48; |
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55 |
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56 public TriggerResize() |
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57 { |
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58 super(); |
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59 } |
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60 |
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61 public void load(int index) |
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62 { |
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63 byte[] bytes = new byte[TriggerResize.DATA.length]; |
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64 for (int i=0; i<bytes.length; i++) |
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65 { |
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66 bytes[i] = (byte)TriggerResize.DATA[i]; |
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67 } |
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68 |
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69 // replace id "00000" in TestCase00000 to generate new class on the fly |
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70 { |
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71 int byte1 = index % 10; |
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72 int byte2 = index / 10 % 10; |
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73 int byte3 = index / 100 % 10; |
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74 int byte4 = index / 1000 % 10; |
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75 int byte5 = index / 10000 % 10; |
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76 |
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77 bytes[INDEX1+0] = bytes[INDEX2+0] = (byte)(BASE+byte5); |
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78 bytes[INDEX1+1] = bytes[INDEX2+1] = (byte)(BASE+byte4); |
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79 bytes[INDEX1+2] = bytes[INDEX2+2] = (byte)(BASE+byte3); |
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80 bytes[INDEX1+3] = bytes[INDEX2+3] = (byte)(BASE+byte2); |
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81 bytes[INDEX1+4] = bytes[INDEX2+4] = (byte)(BASE+byte1); |
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82 } |
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83 |
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84 Class generatedClass = defineClass(bytes, 0, bytes.length); |
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85 resolveClass(generatedClass); |
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86 } |
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87 |
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88 public static void main(String args[]) throws Exception |
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89 { |
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90 int count = 0; |
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91 if (args.length >= 1) { |
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92 Integer i = new Integer(args[0]); |
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93 count = i.intValue(); |
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94 } |
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95 |
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96 TriggerResize test = new TriggerResize(); |
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97 for (int i = 0; i <= count; i++) |
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98 { |
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99 test.load(i); |
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100 } |
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101 |
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102 // trigger safepoint to resize the SystemDictionary if needed |
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103 System.gc(); |
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104 } |
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105 } |