[libFuzzer] Use ChooseUnitIdxToMutate to pick item for crossover.

Differential Revision: https://reviews.llvm.org/D30683

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297891 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Fuzzer/FuzzerMutate.cpp b/lib/Fuzzer/FuzzerMutate.cpp
index c9768e4a5f28a6e4c9ff6844de97ce2802e6a280..2010521ac38026262fdf84aa2063839b259020b7 100644 (file)
--- a/lib/Fuzzer/FuzzerMutate.cpp
+++ b/lib/Fuzzer/FuzzerMutate.cpp
@@ -77,7 +77,7 @@ size_t MutationDispatcher::Mutate_CustomCrossOver(uint8_t *Data, size_t Size,
                                                   size_t MaxSize) {
   if (!Corpus || Corpus->size() < 2 || Size == 0)
     return 0;
-  size_t Idx = Rand(Corpus->size());
+  size_t Idx = Corpus->ChooseUnitIdxToMutate(Rand);
   const Unit &Other = (*Corpus)[Idx];
   if (Other.empty())
     return 0;

diff --git a/lib/Fuzzer/FuzzerMutate.h b/lib/Fuzzer/FuzzerMutate.h
index 8c8fb3fd74c7b2dd64ba190df0772f81e201d50e..9c946eab9f717620cf06461faed0bc23974727b0 100644 (file)
--- a/lib/Fuzzer/FuzzerMutate.h
+++ b/lib/Fuzzer/FuzzerMutate.h
@@ -88,7 +88,7 @@ public:
   void ClearAutoDictionary();
   void PrintRecommendedDictionary();
 
-  void SetCorpus(const InputCorpus *Corpus) { this->Corpus = Corpus; }
+  void SetCorpus(InputCorpus *Corpus) { this->Corpus = Corpus; }
 
   Random &GetRand() { return Rand; }
 
@@ -141,7 +141,7 @@ private:
   DictionaryEntry CmpDictionaryEntriesDeque[kCmpDictionaryEntriesDequeSize];
   size_t CmpDictionaryEntriesDequeIdx = 0;
 
-  const InputCorpus *Corpus = nullptr;
+  InputCorpus *Corpus = nullptr;
   std::vector<uint8_t> MutateInPlaceHere;
   // CustomCrossOver needs its own buffer as a custom implementation may call
   // LLVMFuzzerMutate, which in turn may resize MutateInPlaceHere.