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/* Copyright (C) 2021-2024 Free Software Foundation, Inc.
Contributed by Oracle.
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
import java.lang.reflect.*;
public class Launcher {
// Byte array for dynamically loaded class: //
//public class DynLoadedClass { //
// public int DynamicFunction(int x) { //
// float f = 0; //
// for (int k=0 ; k<20000; k++) { //
// f = ((float)k) / x; //
// } //
// return (int)f; //
// } //
// //
// public static void main(String[] args){ //
// DynLoadedClass dcls = new DynLoadedClass(); //
// for (int k=0 ; k<10; k++) { //
// dcls.DynamicFunction(k); //
// } //
// } //
//} //
static final byte [] bClassGenerated = {
-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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
15, 0, 1, 0, 14, 0, 0, 0, 2, 0, 15
};
private static DynClassLoader persistentInstance;
public static DynClassLoader getPersistentInstance()
{
if (persistentInstance == null)
persistentInstance = new DynClassLoader();
return persistentInstance;
}
public static void main(String args []) {
if (args.length != 1) {
System.err.println("Usage: Launcher DynLoadedClass");
return;
}
String className = args[0]; // Dynamic class name
try {
Class genClass = getPersistentInstance().getClassFromByteArray(className, bClassGenerated);
Method[] methods_g = genClass.getDeclaredMethods();
for (int i = 0; i < methods_g.length; i++) {
Method m = methods_g[i];
String methodName = m.getName();
String progArgs[] = new String[1];
//System.out.println("Invoking method " + className + "." + methodName);
if (methodName.equals("main"))
m.invoke( null, (Object[]) progArgs );
}
} catch (InvocationTargetException iex) {
System.err.println("InvocationTargetException");
} catch (IllegalAccessException aex) {
System.err.println("IllegalAccessException");
}
}
// Class loader to generate dynamic class on the fly from the byte array
private static class DynClassLoader extends ClassLoader {
public DynClassLoader() { }
public Class getClassFromByteArray(String name, byte[] b) {
return super.defineClass(name, b, 0, b.length);
}
}
}
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