How to debug CUDA code in MEX function

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Hi Guys,

I am currently writing a Matlab GUI for doing MRI image reconstruction. This GUI uses a MEX function running as a calculation kernel, and I have managed to add some CUDA GPU functions in order to speed up the performance. I have no problem for compiling the MEX c source code within Matlab using mex or using Visual Studio 2008 itself. However, I do have a big problem for debugging my code. Especially I had a hard time trying to figure out a way to get into GPU function for debugging, for instance, checking variables, which is very important for me since I am a beginner for CUDA programming. I am wondering if anyone has any experience for debugging CUDA GPU code in MEX function. Any thought of how to do this will be highly appreciated. Thanks a lot!