static jclass FindClass(JNIEnv* env, const char* name) {
    CHECK_NON_NULL_ARGUMENT(name);
    ...
    ...
    if (runtime->IsStarted()) {
      //关键的地方为GetClassLoader
      StackHandleScope<1> hs(soa.Self());
      Handle<mirror::ClassLoader> class_loader(hs.NewHandle(GetClassLoader(soa)));
      c = class_linker->FindClass(soa.Self(), descriptor.c_str(), class_loader);
    } else {
      c = class_linker->FindSystemClass(soa.Self(), descriptor.c_str());
    }
    return soa.AddLocalReference<jclass>(c);
  }

static ObjPtr<mirror::ClassLoader> GetClassLoader(const ScopedObjectAccess& soa)
    REQUIRES_SHARED(Locks::mutator_lock_) {
  ArtMethod* method = soa.Self()->GetCurrentMethod(nullptr);
  // If we are running Runtime.nativeLoad, use the overriding ClassLoader it set.
  if (method == jni::DecodeArtMethod(WellKnownClasses::java_lang_Runtime_nativeLoad)) {
    return soa.Decode<mirror::ClassLoader>(soa.Self()->GetClassLoaderOverride());
  }