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