From a9a548049a29fb73b95bfdeea1a606b42a8d5c85 Mon Sep 17 00:00:00 2001
From: Kostya Serebryany <kcc@google.com>
Date: Wed, 17 Aug 2016 20:45:23 +0000
Subject: [libFuzzer] when printing the reproducer input, also print the base
 input and the mutation sequence

llvm-svn: 278975
---
 llvm/lib/Fuzzer/FuzzerLoop.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Fuzzer/FuzzerLoop.cpp')

diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index 07de3c7..5d94483 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -204,6 +204,8 @@ void Fuzzer::StaticDeathCallback() {
 
 void Fuzzer::DumpCurrentUnit(const char *Prefix) {
   if (!CurrentUnitData) return;  // Happens when running individual inputs.
+  MD.PrintMutationSequence();
+  Printf("; base unit: %s\n", Sha1ToString(BaseSha1).c_str());
   size_t UnitSize = CurrentUnitSize;
   if (UnitSize <= kMaxUnitSizeToPrint) {
     PrintHexArray(CurrentUnitData, UnitSize, "\n");
@@ -693,6 +695,7 @@ void Fuzzer::MutateAndTestOne() {
   MD.StartMutationSequence();
 
   auto &U = ChooseUnitToMutate();
+  ComputeSHA1(U.data(), U.size(), BaseSha1);  // Remember where we started.
   assert(CurrentUnitData);
   size_t Size = U.size();
   assert(Size <= Options.MaxLen && "Oversized Unit");
-- 
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