Help! Exception? I have no idea why it throws an Exception

[glaksmono]

So here’s the code:

include <stdio.h>

include <stdlib.h>

include <cuda_runtime.h>

include <cutil.h>

global static void HelloCUDA(char* result, int num)

{

int i = 0;

char p_HelloCUDA[] = "Hello CUDA!";

int j = threadIdx.x;



printf("I'm threadId = %d\n", j);

for(i = 0; i < num; i++) {

	result[i] = p_HelloCUDA[i];

}

}

int main()

{

char	*device_result	= 0;

HelloCUDA<<<1, 1, 0>>>(device_result, 11);

}

I have no clue on why does it throw an Exception? I use the EmuDebug mode. Anyone? Thanks!

[Sarnath]

So here’s the code:

I have no clue on why does it throw an Exception? I use the EmuDebug mode. Anyone? Thanks!

You have not allocated memory for “device_result”. Thats the reason. Since this is in emu mode, you could just use malloc()

Do a cudaThreadSynchronize() towards the end so that the main thread waits for things to complete…