[llvm-dev] [cfe-dev] [8.0.0 Release] Need help with PR40761: Sanitizers broken on FreeBSD (original) (raw)

Hans Wennborg via llvm-dev llvm-dev at lists.llvm.org
Mon Feb 25 07:58:11 PST 2019

Many thanks for digging into this, and sorry for my slow reply.

Kamil: it sounds like your commit is involved here. Any idea what's happening?

Dimitry: If we don't find anyone to debug and fix this before the release, how bad is it for FreeBSD? Can it be worked around downstream if 8.0.0 ships without a fix? Since I'm not entirely sure how supported this functionality is on FreeBSD, I'm not sure how much we should block the release on it.

Kim: If you can bisect to find that $somewhere revision, that would be very helpful.

Thanks, Hans

On Sun, Feb 24, 2019 at 11:36 AM Kim Gräsman <kim.grasman at gmail.com> wrote:

Hi again, It took me a while to get the environment up and running. Turns out the sanitizer test suite is in pretty bad shape overall on FreeBSD. The target reproducing the DEADLYSIGNAL loop is check-asan-dynamic. I ran the bisect all the way from release/7.x to release/8.x -- * release/7.x - normal test run * $somewhere - another hang bug where the lit invocation stops dead immediately after warning about %sharedlibasan: llvm-lit: /home/kimgr/code/llvm-project/compiler-rt/test/asan/lit.cfg:110: warning: %sharedlibasan substitution not set but dynamic ASan is available. * 342d03e71fbc302cf5a1683dcd03c366bf96d4bb (Reimplement Thread Static Data ASan routines with TLS) - AddressSanitizer:DEADLYSIGNAL The DEADLYSIGNAL behavior is in fact introduced by https://reviews.llvm.org/D55596. But it looks like FreeBSD was broken even before this. I'll see if I can bisect where $somewhere is. - Kim On Fri, Feb 22, 2019 at 1:39 PM Hans Wennborg <hans at chromium.org> wrote: > > That's excellent! > > I think the check-sanitizer target should cover it. > > Thanks, > Hans > > On Fri, Feb 22, 2019 at 1:34 PM Kim Gräsman <kim.grasman at gmail.com> wrote: > > > > Hi Hans, > > > > I have a freebsd machine and some time to spare this weekend. > > > > Could you offer the minimal git bisect command to repro? I'm hoping not to have to run the full check-clang test suite if there's a smaller subset of tests for ASAN. > > > > Thanks, > > - Kim > > > > On Thu, Feb 21, 2019, 11:27 Hans Wennborg via cfe-dev <cfe-dev at lists.llvm.org> wrote: > >> > >> I think the release is looking pretty good, but there is one blocker > >> that's worrying me: https://llvm.org/PR40761 > >> > >> From what I understand, ASan et al. used to work on FreeBSD but don't > >> anymore, and there's nobody working on it. > >> > >> Is there someone who has access to a FreeBSD machine that could help > >> investigate this? Just getting it bisected would be super helpful. > >> > >> Thanks, > >> Hans _> >> ________________________ > >> cfe-dev mailing list > >> cfe-dev at lists.llvm.org > >> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev

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