[libFuzzer] use raw C IO to reduce the risk of a deadlock in a signal handler.
llvm-svn: 244707
diff --git a/llvm/lib/Fuzzer/FuzzerIO.cpp b/llvm/lib/Fuzzer/FuzzerIO.cpp
index 1d25389..f0295e9 100644
--- a/llvm/lib/Fuzzer/FuzzerIO.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIO.cpp
@@ -66,8 +66,11 @@
}
void WriteToFile(const Unit &U, const std::string &Path) {
- std::ofstream OF(Path);
- OF.write((const char*)U.data(), U.size());
+ // Use raw C interface because this function may be called from a sig handler.
+ FILE *Out = fopen(Path.c_str(), "w");
+ if (!Out) return;
+ fwrite(U.data(), sizeof(U[0]), U.size(), Out);
+ fclose(Out);
}
void ReadDirToVectorOfUnits(const char *Path, std::vector<Unit> *V,