package org.jruby.util.unsafe;
import java.io.FileOutputStream;
import org.jruby.compiler.impl.SkinnyMethodAdapter;
import org.objectweb.asm.ClassWriter;
import static org.objectweb.asm.Opcodes.*;
import static org.jruby.util.CodegenUtils.*;
public class UnsafeGenerator {
public static void main(String[] args) {
if (args.length != 2) {
System.err.println("Two args please, the target package and directory");
System.exit(1);
}
String pkg = args[0].replace('.', '/');
String dir = args[1];
String classname = pkg + "/GeneratedUnsafe";
String classpath = dir + "/GeneratedUnsafe.class";
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classname, null, p(Object.class), new String[] {p(Unsafe.class)});
cw.visitSource("<generated>", null);
SkinnyMethodAdapter method = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "<init>", sig(void.class), null, null));
method.start();
method.aload(0);
method.invokespecial(p(Object.class), "<init>", sig(void.class));
method.voidreturn();
method.end();
method = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "throwException", sig(void.class, Throwable.class), null, null));
method.start();
method.aload(1);
method.athrow();
method.end();
cw.visitEnd();
byte[] bytecode = cw.toByteArray();
try {
FileOutputStream fos = new FileOutputStream(classpath);
fos.write(bytecode);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}