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fd67aa11 | 1 | /* Copyright (C) 2021-2024 Free Software Foundation, Inc. |
defb7341 VM |
2 | Contributed by Oracle. |
3 | ||
4 | This file is part of GNU Binutils. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
bb368aad VM |
20 | |
21 | import java.lang.reflect.*; | |
22 | ||
23 | public class Launcher { | |
24 | // Byte array for dynamically loaded class: // | |
25 | //public class DynLoadedClass { // | |
26 | // public int DynamicFunction(int x) { // | |
27 | // float f = 0; // | |
28 | // for (int k=0 ; k<20000; k++) { // | |
29 | // f = ((float)k) / x; // | |
30 | // } // | |
31 | // return (int)f; // | |
32 | // } // | |
33 | // // | |
34 | // public static void main(String[] args){ // | |
35 | // DynLoadedClass dcls = new DynLoadedClass(); // | |
36 | // for (int k=0 ; k<10; k++) { // | |
37 | // dcls.DynamicFunction(k); // | |
38 | // } // | |
39 | // } // | |
40 | //} // | |
41 | static final byte [] bClassGenerated = { | |
42 | -54, -2, -70, -66, 0, 0, 0, 46, 0, 20, 10, 0, 5, 0, 16, 7, 0, 17, 10, 0, 2, 0, 16, 10, 0, 2, | |
43 | 0, 18, 7, 0, 19, 1, 0, 6, 60, 105, 110, 105, 116, 62, 1, 0, 3, 40, 41, 86, 1, 0, 4, 67, 111, | |
44 | 100, 101, 1, 0, 15, 76, 105, 110, 101, 78, 117, 109, 98, 101, 114, 84, 97, 98, 108, 101, 1, 0, 15, 68, 121, | |
45 | 110, 97, 109, 105, 99, 70, 117, 110, 99, 116, 105, 111, 110, 1, 0, 4, 40, 73, 41, 73, 1, 0, 4, 109, 97, | |
46 | 105, 110, 1, 0, 22, 40, 91, 76, 106, 97, 118, 97, 47, 108, 97, 110, 103, 47, 83, 116, 114, 105, 110, 103, 59, | |
47 | 41, 86, 1, 0, 10, 83, 111, 117, 114, 99, 101, 70, 105, 108, 101, 1, 0, 19, 68, 121, 110, 76, 111, 97, 100, | |
48 | 101, 100, 67, 108, 97, 115, 115, 46, 106, 97, 118, 97, 12, 0, 6, 0, 7, 1, 0, 14, 68, 121, 110, 76, 111, | |
49 | 97, 100, 101, 100, 67, 108, 97, 115, 115, 12, 0, 10, 0, 11, 1, 0, 16, 106, 97, 118, 97, 47, 108, 97, 110, | |
50 | 103, 47, 79, 98, 106, 101, 99, 116, 0, 33, 0, 2, 0, 5, 0, 0, 0, 0, 0, 3, 0, 1, 0, 6, 0, | |
51 | 7, 0, 1, 0, 8, 0, 0, 0, 29, 0, 1, 0, 1, 0, 0, 0, 5, 42, -73, 0, 1, -79, 0, 0, 0, | |
52 | 1, 0, 9, 0, 0, 0, 6, 0, 1, 0, 0, 0, 1, 0, 1, 0, 10, 0, 11, 0, 1, 0, 8, 0, 0, | |
53 | 0, 66, 0, 2, 0, 4, 0, 0, 0, 26, 11, 69, 3, 62, 29, 17, 78, 32, -94, 0, 15, 29, -122, 27, -122, | |
54 | 110, 69, -124, 3, 1, -89, -1, -16, 36, -117, -84, 0, 0, 0, 1, 0, 9, 0, 0, 0, 22, 0, 5, 0, 0, | |
55 | 0, 3, 0, 2, 0, 4, 0, 11, 0, 5, 0, 17, 0, 4, 0, 23, 0, 7, 0, 9, 0, 12, 0, 13, 0, | |
56 | 1, 0, 8, 0, 0, 0, 69, 0, 2, 0, 3, 0, 0, 0, 29, -69, 0, 2, 89, -73, 0, 3, 76, 3, 61, | |
57 | 28, 16, 10, -94, 0, 15, 43, 28, -74, 0, 4, 87, -124, 2, 1, -89, -1, -15, -79, 0, 0, 0, 1, 0, 9, | |
58 | 0, 0, 0, 22, 0, 5, 0, 0, 0, 11, 0, 8, 0, 12, 0, 16, 0, 13, 0, 22, 0, 12, 0, 28, 0, | |
59 | 15, 0, 1, 0, 14, 0, 0, 0, 2, 0, 15 | |
60 | }; | |
61 | ||
62 | private static DynClassLoader persistentInstance; | |
63 | ||
64 | public static DynClassLoader getPersistentInstance() | |
65 | { | |
66 | if (persistentInstance == null) | |
67 | persistentInstance = new DynClassLoader(); | |
68 | return persistentInstance; | |
69 | } | |
70 | ||
71 | public static void main(String args []) { | |
72 | if (args.length != 1) { | |
73 | System.err.println("Usage: Launcher DynLoadedClass"); | |
74 | return; | |
75 | } | |
76 | ||
77 | String className = args[0]; // Dynamic class name | |
78 | ||
79 | try { | |
80 | Class genClass = getPersistentInstance().getClassFromByteArray(className, bClassGenerated); | |
81 | Method[] methods_g = genClass.getDeclaredMethods(); | |
82 | ||
83 | for (int i = 0; i < methods_g.length; i++) { | |
84 | Method m = methods_g[i]; | |
85 | String methodName = m.getName(); | |
86 | String progArgs[] = new String[1]; | |
87 | //System.out.println("Invoking method " + className + "." + methodName); | |
88 | if (methodName.equals("main")) | |
89 | m.invoke( null, (Object[]) progArgs ); | |
90 | } | |
91 | } catch (InvocationTargetException iex) { | |
92 | System.err.println("InvocationTargetException"); | |
93 | } catch (IllegalAccessException aex) { | |
94 | System.err.println("IllegalAccessException"); | |
95 | } | |
96 | } | |
97 | ||
98 | // Class loader to generate dynamic class on the fly from the byte array | |
99 | private static class DynClassLoader extends ClassLoader { | |
100 | public DynClassLoader() { } | |
101 | public Class getClassFromByteArray(String name, byte[] b) { | |
102 | return super.defineClass(name, b, 0, b.length); | |
103 | } | |
104 | } | |
105 | ||
106 | ||
107 | } |