[compiler-rt] r184734 - [msan] Unpoison param-tls in signal handler wrapper.

[Alexey Samsonov]

I think this should be fixed by r185062. Thanks!


On Thu, Jun 27, 2013 at 2:57 AM, David Blaikie <dblaikie at gmail.com> wrote:

> On Mon, Jun 24, 2013 at 6:48 AM, Evgeniy Stepanov
> <eugeni.stepanov at gmail.com> wrote:
> > Author: eugenis
> > Date: Mon Jun 24 08:48:42 2013
> > New Revision: 184734
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=184734&view=rev
> > Log:
> > [msan] Unpoison param-tls in signal handler wrapper.
>
> Not sure if this is related to this commit, but gold seems to be
> warning about __msan_unpoison_param:
>
> /bin/ld: warning: Cannot export local symbol '__msan_unpoison_param'
>
> >
> > This an entry point from uninstrumented code.
> >
> > Modified:
> >     compiler-rt/trunk/lib/msan/msan_interceptors.cc
> >
> > Modified: compiler-rt/trunk/lib/msan/msan_interceptors.cc
> > URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/msan_interceptors.cc?rev=184734&r1=184733&r2=184734&view=diff
> >
> ==============================================================================
> > --- compiler-rt/trunk/lib/msan/msan_interceptors.cc (original)
> > +++ compiler-rt/trunk/lib/msan/msan_interceptors.cc Mon Jun 24 08:48:42
> 2013
> > @@ -888,6 +888,7 @@ static void SignalHandler(int signo) {
> >  }
> >
> >  static void SignalAction(int signo, void *si, void *uc) {
> > +  __msan_unpoison_param(3);
> >    __msan_unpoison(si, __sanitizer::struct_sigaction_sz);
> >    __msan_unpoison(uc, __sanitizer::ucontext_t_sz);
> >
> >
> >
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-- 
Alexey Samsonov, MSK
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