[libFuzzer] use fflush after every Printf

llvm-svn: 264459

diff --git a/llvm/lib/Fuzzer/FuzzerIO.cpp b/llvm/lib/Fuzzer/FuzzerIO.cpp
index de1624d..ac35d73 100644 (file)
--- a/llvm/lib/Fuzzer/FuzzerIO.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIO.cpp
@@ -134,6 +134,7 @@ void Printf(const char *Fmt, ...) {
   va_start(ap, Fmt);
   vfprintf(OutputFile, Fmt, ap);
   va_end(ap);
+  fflush(OutputFile);
 }
 
 }  // namespace fuzzer