cuda copy to symbol, device to device

main.cu

#include <cstdio>

#define N 3

__device__ int d_array[N] = {1, 2, 3};
__device__ __constant__ int d_array_constant[N];

static const char *_cudaGetErrorEnum(cudaError_t error) {
  return cudaGetErrorName(error);
}

template <typename T>
void check(T result, char const *const func, const char *const file,
           int const line) {
  if (result) {
    fprintf(stderr, "CUDA error at %s:%d code=%d(%s) \"%s\" \n", file, line,
            static_cast<unsigned int>(result), _cudaGetErrorEnum(result), func);
    exit(EXIT_FAILURE);
  }
}

#define checkCudaErrors(val) check((val), #val, __FILE__, __LINE__)

int main() {
    int *d_array_tmp;
    cudaMalloc(&d_array_tmp, N*sizeof(int));
    checkCudaErrors(cudaMemcpyFromSymbol(d_array_tmp, d_array, N*sizeof(int), 0, cudaMemcpyDeviceToDevice));
    checkCudaErrors(cudaMemcpyToSymbol(d_array_constant, d_array_tmp, N*sizeof(int), 0, cudaMemcpyDeviceToDevice));
    cudaFree(d_array_tmp);
    return 0;
}