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enabled neverZero feature again

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hexcoder-
2019-11-12 23:12:14 +01:00
parent d51719fbd9
commit 7f017aa724
1 changed files with 5 additions and 9 deletions
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14
gcc_plugin/afl-gcc-rt.o.c
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@ -9,8 +9,6 @@
GCC integration design is based on the LLVM design, which comes GCC integration design is based on the LLVM design, which comes
from Laszlo Szekeres. from Laszlo Szekeres.
Copyright 2015 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. you may not use this file except in compliance with the License.
You may obtain a copy of the License at: You may obtain a copy of the License at:
@ -55,15 +53,13 @@ __thread u32 __afl_prev_loc;
#endif #endif
/* Trace a basic block with some ID */ /* Trace a basic block with some ID */
void __afl_trace(u32 x) { void __afl_trace(const u32 x) {
u32 l = __afl_prev_loc; #if 1 /* enable for neverZero feature. */
__afl_area_ptr[__afl_prev_loc ^ x] += 1
#if 0 /* enable for neverZero feature. By default disabled since too inefficient :-( */ + ((u8)(1 + __afl_area_ptr[__afl_prev_loc ^ x]) == 0);
/* @Marc: avoid conditional jumps here */
__afl_area_ptr[l ^ x] += 1 + (__afl_area_ptr[l ^ x] == (u8)~0);
#else #else
++__afl_area_ptr[l ^ x]; ++__afl_area_ptr[__afl_prev_loc ^ x];
#endif #endif
__afl_prev_loc = (x >> 1); __afl_prev_loc = (x >> 1);