[libFuzzer] when choosing the next unit to mutate, give some preference to the most recent units (they are more likely to be interesting)

llvm-svn: 252097

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerInternal.h b/llvm/lib/Fuzzer/FuzzerInternal.h
index d6e1cb85a23..0fa0b90b803 100644
--- a/llvm/lib/Fuzzer/FuzzerInternal.h
+++ b/llvm/lib/Fuzzer/FuzzerInternal.h
@@ -99,6 +99,7 @@ class Fuzzer {
   };
   Fuzzer(UserSuppliedFuzzer &USF, FuzzingOptions Options);
   void AddToCorpus(const Unit &U) { Corpus.push_back(U); }
+  size_t ChooseUnitToMutate();
   void Loop();
   void ShuffleAndMinimize();
   void InitializeTraceState();