OpenCL POCL + asan or valgrind

Question

I am trying to debug my OpenCL kernel. I think, the error is in wrong memory allocation. So, I'am looking for a way to detect it.

Long story short, could I just run OpenCL kernel on POCL platform and check it with well-known instruments?

Answer 1

You can do that. However, there is also tool called Oclgrind designed just for that: https://github.com/jrprice/Oclgrind

Answer 2

Yes, Oclgrind should give more helpful error messages, but also pocl's debug symbol support should again work in master. Thus, valgrind and gdb should now be able to identify OpenCL C line numbers better.

There's also a new env POCL_EXTRA_BUILD_FLAGS in pocl master:

"Adds the contents of the environment variable to all clBuildProgram() calls. E.g. POCL_EXTRA_BUILD_FLAGS="-g -cl-opt-disable" can be useful for force adding debug data all the built kernels to help debugging kernel issues with tools such as gdb or valgrind."