[libFuzzer] Remove lazy counters.

Summary: Lazy counters haven't improved performance for large fuzz targets.

Reviewers: kcc

Reviewed By: kcc

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67476

llvm-svn: 373403

1 files changed, 0 insertions, 6 deletions

diff --git a/compiler-rt/lib/fuzzer/FuzzerUtilPosix.cpp b/compiler-rt/lib/fuzzer/FuzzerUtilPosix.cpp
index 110785d8741..cefe7ae181e 100644
--- a/compiler-rt/lib/fuzzer/FuzzerUtilPosix.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerUtilPosix.cpp
@@ -37,7 +37,6 @@ static void (*upstream_segv_handler)(int, siginfo_t *, void *);
 
 static void SegvHandler(int sig, siginfo_t *si, void *ucontext) {
   assert(si->si_signo == SIGSEGV);
-  if (TPC.UnprotectLazyCounters(si->si_addr)) return;
   if (upstream_segv_handler)
     return upstream_segv_handler(sig, si, ucontext);
   Fuzzer::StaticCrashSignalCallback();
@@ -98,11 +97,6 @@ void SetTimer(int Seconds) {
   SetSigaction(SIGALRM, AlarmHandler);
 }
 
-bool Mprotect(void *Ptr, size_t Size, bool AllowReadWrite) {
-  return 0 == mprotect(Ptr, Size,
-                       AllowReadWrite ? (PROT_READ | PROT_WRITE) : PROT_NONE);
-}
-
 void SetSignalHandler(const FuzzingOptions& Options) {
   if (Options.UnitTimeoutSec > 0)
     SetTimer(Options.UnitTimeoutSec / 2 + 1);