[llvm] r258462 - [libFuzzer] don't do expensive memmem if the result will not be used

[Kostya Serebryany via llvm-commits]

Author: kcc
Date: Thu Jan 21 19:04:58 2016
New Revision: 258462

URL: http://llvm.org/viewvc/llvm-project?rev=258462&view=rev
Log:
[libFuzzer] don't do expensive memmem if the result will not be used

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

Modified: llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp?rev=258462&r1=258461&r2=258462&view=diff
==============================================================================
--- llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp (original)
+++ llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp Thu Jan 21 19:04:58 2016
@@ -362,6 +362,7 @@ void TraceState::DFSanSwitchCallback(uin
 
 int TraceState::TryToAddDesiredData(uint64_t PresentData, uint64_t DesiredData,
                                     size_t DataSize) {
+  if (NumMutations >= kMaxMutations) return 0;
   int Res = 0;
   const uint8_t *Beg = *CurrentUnitData;
   const uint8_t *End = Beg + *CurrentUnitSize;
@@ -382,6 +383,7 @@ int TraceState::TryToAddDesiredData(uint
 int TraceState::TryToAddDesiredData(const uint8_t *PresentData,
                                     const uint8_t *DesiredData,
                                     size_t DataSize) {
+  if (NumMutations >= kMaxMutations) return 0;
   int Res = 0;
   const uint8_t *Beg = *CurrentUnitData;
   const uint8_t *End = Beg + *CurrentUnitSize;