> On Oct 12, 2026, at 12:45 PM, Poul-Henning Kamp <[email protected]> wrote: > > -------- > Adrian Chadd writes: > >> On Mon, 12 Oct 2026 at 12:16, Poul-Henning Kamp <[email protected]> wrote: >> >>> INTRO: >>> ====== >>> >>> Coverage profiling is where the compiler adds counters in the code so >>> one can tell which bits got executed how many times. >>> >>> >>> >> oh this is neat! I wonder how we should run this up the flagpole at LLVM >> land? > > By all means! > > Maybe point out to them that the mmap(2) would work on any OS with > a working mmap(2) ?
I’m a bit puzzled how this is different from the already documented/implemented --coverage option in compiler_rt, when combined with gcov and lcov. compiler_rt support has been working for almost a decade now on FreeBSD — it’s just not integrated into the build. I tried doing it back in 2017 and ran into brick walls around generated objects, naming schemes, etc. I could dig up the work if requested. Thanks, -Enji
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