#include <jvmti.h>

static const char* TARGET_CLASS_NAME = "Main$Nested";

void start(jvmtiEnv *jvmti_env, JNIEnv* jni_env) {

  jclass cls = jni_env->FindClass(TARGET_CLASS_NAME);
  if (cls == nullptr) {
    jni_env->ExceptionDescribe();
    return;
  }
}

JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM *vm, char *options, void *reserved) {
  jvmtiEnv* env;
  jint jni_err = vm->GetEnv((void**) &env, JVMTI_VERSION);
  if (jni_err != JNI_OK) {
    return jni_err;
  }

  jvmtiEventCallbacks callbacks;
  callbacks.VMStart = start;

  int err = env->SetEventCallbacks(&callbacks, (jint) sizeof(callbacks));
  if (err != JVMTI_ERROR_NONE) {
    return err;
  }

  err = env->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_START, nullptr);
  if (err != JVMTI_ERROR_NONE) {
    return err;
  }

  return 0;
}