public class Instrumenting {
private static final String CLASS_NAME = "java.lang.RuntimeException";
public static void instrument(Instrumentation instrumentation) throws Exception {
    System.out.println("[Instrumenting] starting to instrument '" + CLASS_NAME + "'");
    instrumentation.appendToBootstrapClassLoaderSearch(new JarFile("C:\\Users\\Moritz\\Instrumenting\\dist\\Instrumenting.jar"));
    File temp = Files.createTempDirectory("tmp").toFile();
    ClassInjector.UsingInstrumentation.of(temp, ClassInjector.UsingInstrumentation.Target.BOOTSTRAP, instrumentation).inject(Collections.singletonMap(
        new TypeDescription.ForLoadedType(RuntimeExceptionIntercept.class),
        ClassFileLocator.ForClassLoader.read(RuntimeExceptionIntercept.class)));
    new AgentBuilder.Default()
            .ignore(ElementMatchers.none())
            .with(new AgentBuilder.InjectionStrategy.UsingInstrumentation(instrumentation, temp))
            .type(ElementMatchers.named(CLASS_NAME))
            .transform((DynamicType.Builder<?> builder, TypeDescription td, ClassLoader cl, JavaModule jm) -> 
                    builder
                            .visit(Advice.to(RuntimeExceptionIntercept.class)
                                            .on(ElementMatchers.isConstructor())
            ).installOn(instrumentation);
    System.out.println("[Instrumenting] done");
public static class RuntimeExceptionIntercept {
    @Advice.OnMethodEnter
    public static void onEnter(String message) throws Exception {
        System.err.println("onEnter: " + message);
    @Advice.OnMethodExit
    public static void onExit(String message) throws Exception {
        System.err.println("onExit: " + message);
}

public class Main {
public static void premain(String agentArgs, Instrumentation instrumentation) throws Exception {
    Instrumenting.instrument(instrumentation);