From 21ebfec79c75f99c938ebfc453e76eb82328d12e Mon Sep 17 00:00:00 2001
From: vanhauser-thc <vh@thc.org>
Date: Wed, 12 Jan 2022 21:59:31 +0100
Subject: better ignore problem handling

---
 instrumentation/afl-compiler-rt.o.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'instrumentation/afl-compiler-rt.o.c')

diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c
index 1b9fdee3..a84f31e3 100644
--- a/instrumentation/afl-compiler-rt.o.c
+++ b/instrumentation/afl-compiler-rt.o.c
@@ -1433,9 +1433,12 @@ void __sanitizer_cov_trace_pc_guard_init(uint32_t *start, uint32_t *stop) {
 
     } else {
 
+      static u32 offset = 4;
+
       while (start < stop) {
 
-        *(start++) = 4;
+        *(start++) = offset;
+        if (unlikely(++offset >= __afl_final_loc)) { offset = 4; }
 
       }
 
@@ -1444,7 +1447,7 @@ void __sanitizer_cov_trace_pc_guard_init(uint32_t *start, uint32_t *stop) {
   }
 
   x = getenv("AFL_INST_RATIO");
-  if (x) inst_ratio = (u32)atoi(x);
+  if (x) { inst_ratio = (u32)atoi(x); }
 
   if (!inst_ratio || inst_ratio > 100) {
 
-- 
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