[msan] Unpoison param-tls in signal handler wrapper.
This an entry point from uninstrumented code. llvm-svn: 184734
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@ -888,6 +888,7 @@ static void SignalHandler(int signo) {
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}
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static void SignalAction(int signo, void *si, void *uc) {
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__msan_unpoison_param(3);
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__msan_unpoison(si, __sanitizer::struct_sigaction_sz);
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__msan_unpoison(uc, __sanitizer::ucontext_t_sz);
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