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[libFuzzer] don't create large random mutations when given an empty seed

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290634 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2016-12-27 22:15:04 +00:00
parent 834b93c09f
commit 8f45dd30a7
1 changed files with 1 additions and 1 deletions
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lib/Fuzzer/FuzzerMutate.cpp
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@ -486,7 +486,7 @@ size_t MutationDispatcher::MutateImpl(uint8_t *Data, size_t Size,
const std::vector<Mutator> &Mutators) {
assert(MaxSize > 0);
if (Size == 0) {
for (size_t i = 0; i < MaxSize; i++)
for (size_t i = 0; i < Min(size_t(4), MaxSize); i++)
Data[i] = RandCh(Rand);
if (Options.OnlyASCII)
ToASCII(Data, MaxSize);