1 files changed, 16 insertions, 2 deletions
diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index 57dbb9fa427..35d68bce694 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -309,10 +309,20 @@ void Fuzzer::PrintStats(const char *Where, const char *End, size_t Units) {
     Printf(" bits: %zd", MaxCoverage.TPCMap.GetNumBitsSinceLastMerge());
   if (MaxCoverage.CallerCalleeCoverage)
     Printf(" indir: %zd", MaxCoverage.CallerCalleeCoverage);
-  if (size_t N = Corpus.size())
-    Printf(" units: %zd", N);
+  if (size_t N = Corpus.size()) {
+    Printf(" corpus: %zd", Corpus.NumActiveUnits());
+    if (size_t N = Corpus.SizeInBytes()) {
+      if (N < (1<<14))
+        Printf("/%zdb", N);
+      else if (N < (1 << 24))
+        Printf("/%zdKb", N >> 10);
+      else
+        Printf("/%zdMb", N >> 20);
+    }
+  }
   if (Units)
     Printf(" units: %zd", Units);
+
   Printf(" exec/s: %zd", ExecPerSec);
   Printf("%s", End);
 }
@@ -403,6 +413,10 @@ void Fuzzer::ShuffleAndMinimize(UnitVector *InitialCorpus) {
   if (Options.ShuffleAtStartUp)
     ShuffleCorpus(InitialCorpus);
 
+  // Test the callback with empty input and never try it again.
+  uint8_t dummy;
+  ExecuteCallback(&dummy, 0);
+
   for (const auto &U : *InitialCorpus) {
     if (RunOne(U)) {
       Corpus.AddToCorpus(U);