I was using llvm nvptx backend to generate some device functions. But when trying to debug them, cuda-gdb sometimes behave strangely. In the example in the attachment, I implement a simple device function with nearly no actual function, but with a local FILE pointer. //lib1.c #include <stdio.h> i…

Hi @sjlcwn A fix for this issue will go out in an upcoming CUDA toolkit release. In the meantime please continue to use the CUDBG_USE_LEGACY_DEBUGGER = 1 environment variable to debug your code sample.

Cuda-gdb CUDBG_ERROR_COMMUNICATION_FAILURE when stepping into a function generated by llvm

Developer Tools CUDA Developer Tools CUDA-GDB

sjlcwn January 29, 2023, 9:45pm 7

Setting environment variable export CUDBG_USE_LEGACY_DEBUGGER=1 seems to help with the crash.