[llvm] r289680 - [libFuzzer] disable msan for one more hook that reads target's data that might be uninitialized

[Kostya Serebryany via llvm-commits]

Author: kcc
Date: Wed Dec 14 12:13:02 2016
New Revision: 289680

URL: http://llvm.org/viewvc/llvm-project?rev=289680&view=rev
Log:
[libFuzzer] disable msan for one more hook that reads target's data that might be uninitialized

Modified:
    llvm/trunk/lib/Fuzzer/FuzzerTracePC.cpp

Modified: llvm/trunk/lib/Fuzzer/FuzzerTracePC.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/FuzzerTracePC.cpp?rev=289680&r1=289679&r2=289680&view=diff
==============================================================================
--- llvm/trunk/lib/Fuzzer/FuzzerTracePC.cpp (original)
+++ llvm/trunk/lib/Fuzzer/FuzzerTracePC.cpp Wed Dec 14 12:13:02 2016
@@ -218,6 +218,9 @@ void TracePC::AddValueForMemcmp(void *ca
   TPC.HandleValueProfile((PC & 4095) | (Idx << 12));
 }
 
+#ifdef __clang__  // avoid gcc warning.
+__attribute__((no_sanitize("memory")))
+#endif
 void TracePC::AddValueForStrcmp(void *caller_pc, const char *s1, const char *s2,
                               size_t n) {
   if (!n) return;