LLVM XRay Runtime Library

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Hi!

I am trying to instrument some LLVM IR. I am working with LLVM IR directly (not using Clang).

I added XRay function attributes and set the XRAY_OPTIONS to patch_premain=true xray_mode=xray-basic verbosity=0.

Still, I see no trace logs getting dumped. From the official documentation, it is not very clear what exactly to do with XRay Runtime Library.

Thanks,
Arpan