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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
class DebugProxy implements java.lang.reflect.InvocationHandler {
private Object obj;
static Class<?>[] interfaces = {Foo.class};
public static Object newInstance(Object obj) {
return java.lang.reflect.Proxy.newProxyInstance(
Foo.class.getClassLoader(), interfaces, new DebugProxy(obj));
}
private DebugProxy(Object obj) {
this.obj = obj;
}
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
Object result;
if (obj == null) {
return null;
}
try {
System.out.println("before invoking method " + m.getName());
result = m.invoke(obj, args);
} catch (InvocationTargetException e) {
throw e.getTargetException();
} catch (Exception e) {
throw new RuntimeException("unexpected invocation exception: " + e.getMessage());
} finally {
System.out.println("after invoking method " + m.getName());
}
return result;
}
}
public class Main {
public static void call(Foo foo) {
if (foo == null) {
return;
}
foo.bar(null);
}
public static void main(String[] args) {
System.loadLibrary(args[0]);
Foo foo = (Foo)DebugProxy.newInstance(null);
ensureJitCompiled(Main.class, "call");
call(foo);
}
private static native void ensureJitCompiled(Class<?> itf, String method_name);
}
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