Question

Is it possible to manually throw an exception in OpenCL, just for debugging purposes? I am having a very strange error in my code: when I computed two double values and add them up, the host reports “CL_OUT_OF_RESOURCE”. However if I don’t add these two values, the host doesn’t report any error.

Answer 1

Exceptions are not supported in OpenCL – it is based on the C99 language.

On AMD GPUs you can use printf inside the kernel – see the cl_amd_printf extension. To use, put this at the top of your .cl file:

#pragma OPENCL EXTENSION cl_amd_printf : enable