1 files changed, 5 insertions, 4 deletions
diff --git a/gcc_plugin/afl-gcc-rt.o.c b/gcc_plugin/afl-gcc-rt.o.c
index 1dfca9e3..47049167 100644
--- a/gcc_plugin/afl-gcc-rt.o.c
+++ b/gcc_plugin/afl-gcc-rt.o.c
@@ -58,10 +58,11 @@ __thread u32 __afl_prev_loc;
 void __afl_trace(u32 x) {
 
   u32 l = __afl_prev_loc;
-  const u32 n = l ^ x;
-  u8 *const bitmap_ptr = __afl_area_ptr + n;
-  *bitmap_ptr += 1 + (*bitmap_ptr == (u8)~0); /* neverZero */
-
+  __afl_area_ptr[l ^ x]++;
+  /* // neverZero is disable as gcc creates non-performant code. shame on you gcc
+  if (__afl_area_ptr[l ^ x] == 0)
+    __afl_area_ptr[l ^ x]++;
+  */
   __afl_prev_loc = (x >> 1);
   return;