I found CodeXL failed to debug my kernel but was able to debug simple kernels from the SDK. Today I decided to try to narrow it down. I think I finally figured it out. CodeXL seems to be unable to handle kernels with more than 3 arguments!
I modified the BinarySearch SDK sample with the following kernel
_kernel void debugKernel(
int numItems, /* Total number of items in the batch. */
__const __global float4* input, /* input: float3, float, float3, float. */
__global int4* results /* output: int triangleID, float hitT, int2 padding. */
, __const __global float4* nodesA /* not used. */
int tid; // thread index.
float hitT = 0.f;
tid = get_global_id(0);
if (tid >= numItems)
STORE_RESULT( tid, tid, hitT );
If I comment out 'nodesA' and the corresponding clSetKernelArg in runDebugKernel(), CodeXL will stop at the breakpoint inside 'debugKernel'. With the unused 4th argument 'nodesA'. I got the following error:
I can't believe I am the only one trying to pass more than 3 arguments to a kernel.
Not being able to debug my OCL kernel make life difficult.
I have attached a complete project to help with repo. Thanks.