[libFuzzer] add -features_dir= flag to dump unique input features on disk

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@358317 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/fuzzer/FuzzerIO.cpp b/lib/fuzzer/FuzzerIO.cpp
index 423ab4bef..a8140b601 100644
--- a/lib/fuzzer/FuzzerIO.cpp
+++ b/lib/fuzzer/FuzzerIO.cpp
@@ -61,10 +61,14 @@ void CopyFileToErr(const std::string &Path) {
 }
 
 void WriteToFile(const Unit &U, const std::string &Path) {
+  WriteToFile(U.data(), U.size(), Path);
+}
+
+void WriteToFile(const uint8_t *Data, size_t Size, const std::string &Path) {
   // Use raw C interface because this function may be called from a sig handler.
   FILE *Out = fopen(Path.c_str(), "wb");
   if (!Out) return;
-  fwrite(U.data(), sizeof(U[0]), U.size(), Out);
+  fwrite(Data, sizeof(Data[0]), Size, Out);
   fclose(Out);
 }