[libFuzzer] simplify TracePC::HandleTrace even further. Also, when dealing with -exit_on_src_pos, symbolize every PC only once

llvm-svn: 285223

1 files changed, 2 insertions, 21 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerTracePC.cpp b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
index dc39eedb2f5..b66e7616b5f 100644
--- a/llvm/lib/Fuzzer/FuzzerTracePC.cpp
+++ b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
@@ -30,19 +30,8 @@ TracePC TPC;
 void TracePC::HandleTrace(uint32_t *Guard, uintptr_t PC) {
   uint32_t Idx = *Guard;
   if (!Idx) return;
-  if (!PCs[Idx % kNumPCs])
-    PCs[Idx % kNumPCs] = PC;
-  uint8_t *CounterPtr = &Counters[Idx % kNumCounters];
-  uint8_t Counter = *CounterPtr;
-  if (UseCounters) {
-    if (Counter < 128)
-      *CounterPtr = Counter + 1;
-    else
-      *Guard = 0;
-  } else {
-    *CounterPtr = 1;
-    *Guard = 0;
-  }
+  PCs[Idx % kNumPCs] = PC;
+  Counters[Idx % kNumCounters]++;
 }
 
 size_t TracePC::GetTotalPCCoverage() {
@@ -70,14 +59,6 @@ void TracePC::PrintModuleInfo() {
   Printf("\n");
 }
 
-void TracePC::ResetGuards() {
-  uint32_t N = 0;
-  for (size_t M = 0; M < NumModules; M++)
-    for (uint32_t *X = Modules[M].Start, *End = Modules[M].Stop; X < End; X++)
-      *X = ++N;
-  assert(N == NumGuards);
-}
-
 size_t TracePC::FinalizeTrace(InputCorpus *C, size_t InputSize, bool Shrink) {
   if (!UsingTracePcGuard()) return 0;
   size_t Res = 0;