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

[David Blaikie]

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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