[libc-commits] [libc] [libc][docs] Add developer guide for source-level code coverage (PR #214692)

[Tapiwa Gonga via libc-commits]

tapiwagonga wrote:

> Overall LGTM, I left a few comments. I'm also curious if this works in fullbuild as well as overlay mode.

Yes, it works in both. Since the test harness dumps the profile buffer directly using our internal `syscall_impl `rather than compiler-rt's default file I/O, it has no host libc dependencies at all. Flipping to -`DLLVM_LIBC_FULL_BUILD=ON` works with the exact same workflow.



https://github.com/llvm/llvm-project/pull/214692