addCode

gistfile1.txt

    private static void addCode(Instrumentation instrumentation) {
        Class[] allLoadedClasses = instrumentation.getAllLoadedClasses();
        System.out.println("all load classes length:" + allLoadedClasses.length);
        System.out.println("object size:" + instrumentation.getObjectSize(new Object()));
        instrumentation.addTransformer(new ClassFileTransformer() {
            @Override
            public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
                if (classBeingRedefined != null) return null;
                System.out.println("class transform " + className);
                return classfileBuffer;
            }
        });
    }