[libc-commits] [PATCH] D139839: [libc] Add a loader utility for AMDHSA architectures for testing

[Jon Chesterfield via Phabricator via libc-commits]

JonChesterfield added a comment.

Hi sivachandra. Integration tests might be the right terminology here. The idea is to take a self contained program containing int main(), compile it for the GPU, then run it using as little infra as possible to minimise the number of places to look for bugs when it goes wrong. The same test would compile and run unchanged on the host architecture, or through qemu or similar if an emulator is available.

That main() could contain a bunch of unit tests, given a framework that can run without dependencies that we don't have yet (so no ostream, at least until a libc++ on the GPU is a thing), but in the first instance it probably streams data to various libc functions directly and returns non-zero if something unexpected happens.

I'd be especially pleased to have this sort of run main() infra in tree as it would let us add other functional testing to the GPU later, e.g. checking that the backend computes the right values under diff optimisation levels, or driving individual pieces of higher level language runtimes. So in a perfect world the loader machinery might end up in some utility folder outside of libc, but this is a great place


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