[libFuzzer] remove experimental flag and functionality

llvm-svn: 249194

1 files changed, 1 insertions, 29 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index 6e04868fd40..62a47bf0581 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -156,11 +156,7 @@ void Fuzzer::ShuffleAndMinimize() {
 size_t Fuzzer::RunOne(const Unit &U) {
   UnitStartTime = system_clock::now();
   TotalNumberOfRuns++;
-  size_t Res = 0;
-  if (Options.UseFullCoverageSet)
-    Res = RunOneMaximizeFullCoverageSet(U);
-  else
-    Res = RunOneMaximizeTotalCoverage(U);
+  size_t Res = RunOneMaximizeTotalCoverage(U);
   auto UnitStopTime = system_clock::now();
   auto TimeOfUnit =
       duration_cast<seconds>(UnitStopTime - UnitStartTime).count();
@@ -183,14 +179,6 @@ void Fuzzer::RunOneAndUpdateCorpus(Unit &U) {
   ReportNewCoverage(RunOne(U), U);
 }
 
-static uintptr_t HashOfArrayOfPCs(uintptr_t *PCs, uintptr_t NumPCs) {
-  uintptr_t Res = 0;
-  for (uintptr_t i = 0; i < NumPCs; i++) {
-    Res = (Res + PCs[i]) * 7;
-  }
-  return Res;
-}
-
 Unit Fuzzer::SubstituteTokens(const Unit &U) const {
   Unit Res;
   for (auto Idx : U) {
@@ -214,22 +202,6 @@ void Fuzzer::ExecuteCallback(const Unit &U) {
   }
 }
 
-// Experimental.
-// Fuly reset the current coverage state, run a single unit,
-// compute a hash function from the full coverage set,
-// return non-zero if the hash value is new.
-// This produces tons of new units and as is it's only suitable for small tests,
-// e.g. test/FullCoverageSetTest.cpp. FIXME: make it scale.
-size_t Fuzzer::RunOneMaximizeFullCoverageSet(const Unit &U) {
-  __sanitizer_reset_coverage();
-  ExecuteCallback(U);
-  uintptr_t *PCs;
-  uintptr_t NumPCs =__sanitizer_get_coverage_guards(&PCs);
-  if (FullCoverageSets.insert(HashOfArrayOfPCs(PCs, NumPCs)).second)
-    return FullCoverageSets.size();
-  return 0;
-}
-
 size_t Fuzzer::RunOneMaximizeTotalCoverage(const Unit &U) {
   size_t NumCounters = __sanitizer_get_number_of_counters();
   if (Options.UseCounters) {