rand unlikely added

domenukk · domenukk · commit 4be0ea596b86 · 2020-08-26T13:04:03.000+02:00
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h
@@ -1031,7 +1031,7 @@ static inline u32 rand_below(afl_state_t *afl, u32 limit) {
   u64 unbiased_rnd; 
   do {
     unbiased_rnd = rand_next(afl);
-  } while (unbiased_rnd >= (UINT64_MAX - (UINT64_MAX % limit)));
+  } while (unlikely(unbiased_rnd >= (UINT64_MAX - (UINT64_MAX % limit))));
   return unbiased_rnd % limit;
 
 }

Original file line number	Diff line number	Diff line change
`@@ -1031,7 +1031,7 @@ static inline u32 rand_below(afl_state_t *afl, u32 limit) {`
`1031`	`1031`	`u64 unbiased_rnd;`
`1032`	`1032`	`do {`
`1033`	`1033`	`unbiased_rnd = rand_next(afl);`
`1034`		`- } while (unbiased_rnd >= (UINT64_MAX - (UINT64_MAX % limit)));`
	`1034`	`+ } while (unlikely(unbiased_rnd >= (UINT64_MAX - (UINT64_MAX % limit))));`
`1035`	`1035`	`return unbiased_rnd % limit;`
`1036`	`1036`
`1037`	`1037`	`}`