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| author | Kostya Serebryany <kcc@google.com> | 2016-08-17 21:50:54 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2016-08-17 21:50:54 +0000 |
| commit | e72774dd69f98b70603f9748e0d77f5197d97a09 (patch) | |
| tree | 756682c1da6ae403c0340e92e77f402e26d1c703 /llvm/lib/Fuzzer/FuzzerMutate.cpp | |
| parent | 432ba9d89a0dfdeedc96a39cb302d9517ab6f559 (diff) | |
| download | bcm5719-llvm-e72774dd69f98b70603f9748e0d77f5197d97a09.tar.gz bcm5719-llvm-e72774dd69f98b70603f9748e0d77f5197d97a09.zip | |
[libFuzzer] given 0 and 255 more preference when inserting repeated bytes
llvm-svn: 278986
Diffstat (limited to 'llvm/lib/Fuzzer/FuzzerMutate.cpp')
| -rw-r--r-- | llvm/lib/Fuzzer/FuzzerMutate.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Fuzzer/FuzzerMutate.cpp b/llvm/lib/Fuzzer/FuzzerMutate.cpp index e7efe6a6e0a..21df1184e98 100644 --- a/llvm/lib/Fuzzer/FuzzerMutate.cpp +++ b/llvm/lib/Fuzzer/FuzzerMutate.cpp @@ -129,7 +129,8 @@ size_t MutationDispatcher::Mutate_InsertRepeatedBytes(uint8_t *Data, size_t Idx = Rand(Size + 1); // Insert new values at Data[Idx]. memmove(Data + Idx + N, Data + Idx, Size - Idx); - uint8_t Byte = RandCh(Rand); + // Give preference to 0x00 and 0xff. + uint8_t Byte = Rand.RandBool() ? Rand(256) : (Rand.RandBool() ? 0 : 255); for (size_t i = 0; i < N; i++) Data[Idx + i] = Byte; return Size + N; |
