StreamExecutor* GetExecutor(int ordinal) {
    if (!cplatform_) {
      cplatform_ = absl::make_unique<CPlatform>(
          platform_, test_util::DestroyPlatform, platform_fns_,
          test_util::DestroyPlatformFns, device_fns_, se_, timer_fns_);
    }
    absl::StatusOr<StreamExecutor*> maybe_executor =
        cplatform_->ExecutorForDevice(ordinal);
    TF_CHECK_OK(maybe_executor.status());