[libFuzzer] when printing the reproducer input, also print the base input and the mutation sequence

llvm-svn: 278975

1 files changed, 8 insertions, 4 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerUtil.cpp b/llvm/lib/Fuzzer/FuzzerUtil.cpp
index a5218d422da..6764a46e7d6 100644
--- a/llvm/lib/Fuzzer/FuzzerUtil.cpp
+++ b/llvm/lib/Fuzzer/FuzzerUtil.cpp
@@ -63,15 +63,19 @@ void PrintASCII(const Unit &U, const char *PrintAfter) {
   PrintASCII(U.data(), U.size(), PrintAfter);
 }
 
-std::string Hash(const Unit &U) {
-  uint8_t Hash[kSHA1NumBytes];
-  ComputeSHA1(U.data(), U.size(), Hash);
+std::string Sha1ToString(uint8_t Sha1[kSHA1NumBytes]) {
   std::stringstream SS;
   for (int i = 0; i < kSHA1NumBytes; i++)
-    SS << std::hex << std::setfill('0') << std::setw(2) << (unsigned)Hash[i];
+    SS << std::hex << std::setfill('0') << std::setw(2) << (unsigned)Sha1[i];
   return SS.str();
 }
 
+std::string Hash(const Unit &U) {
+  uint8_t Hash[kSHA1NumBytes];
+  ComputeSHA1(U.data(), U.size(), Hash);
+  return Sha1ToString(Hash);
+}
+
 static void AlarmHandler(int, siginfo_t *, void *) {
   Fuzzer::StaticAlarmCallback();
 }