[libFuzzer] experimental performance optimization -lazy_counters, off by default. Posix-only for now, tested on Linux
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@352700 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerTracePC.h b/FuzzerTracePC.h
index 2ab75b8..49514b9 100644
--- a/FuzzerTracePC.h
+++ b/FuzzerTracePC.h
@@ -119,6 +119,9 @@
void SetFocusFunction(const std::string &FuncName);
bool ObservedFocusFunction();
+ void ProtectLazyCounters();
+ bool UnprotectLazyCounters(void *CounterPtr);
+
private:
bool UseCounters = false;
uint32_t UseValueProfileMask = false;