diff --git a/llvm/lib/Fuzzer/FuzzerUtil.cpp b/llvm/lib/Fuzzer/FuzzerUtil.cpp
index 254d9c8..d845333 100644
--- a/llvm/lib/Fuzzer/FuzzerUtil.cpp
+++ b/llvm/lib/Fuzzer/FuzzerUtil.cpp
@@ -19,6 +19,7 @@
 #include <cassert>
 #include <chrono>
 #include <cstring>
+#include <stdio.h>
 #include <signal.h>
 #include <sstream>
 #include <unistd.h>
@@ -306,4 +307,14 @@
     Printf(FallbackFMT, PC);
 }
 
+bool ExecuteCommandAndReadOutput(const std::string &Command, std::string *Out) {
+  FILE *Pipe = popen(Command.c_str(), "r");
+  if (!Pipe) return false;
+  char Buff[1024];
+  size_t N;
+  while ((N = fread(Buff, 1, sizeof(Buff), Pipe)) > 0)
+    Out->append(Buff, N);
+  return true;
+}
+
 }  // namespace fuzzer