diff options
Diffstat (limited to 'llvm_mode')
| -rw-r--r-- | llvm_mode/README.persistent_mode.md | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm_mode/README.persistent_mode.md b/llvm_mode/README.persistent_mode.md index 83cc7f4d..4f0bcb2e 100644 --- a/llvm_mode/README.persistent_mode.md +++ b/llvm_mode/README.persistent_mode.md @@ -52,6 +52,21 @@ afl-clang-fast -o fuzz_target fuzz_target.c -lwhat_you_need_for_your_target And that is it! The speed increase is usually x10 to x20. +If you want to be able to compile the target without afl-clang-fast/lto then +add this just after the includes: + +``` +#ifndef __AFL_FUZZ_TESTCASE_LEN + ssize_t fuzz_len; + #define __AFL_FUZZ_TESTCASE_LEN fuzz_len + unsigned char fuzz_buf[1024000]; + #define __AFL_FUZZ_TESTCASE_BUF fuzz_buf + #define __AFL_FUZZ_INIT() void sync(void); + #define __AFL_LOOP(x) ((fuzz_len = read(0, fuzz_buf, sizeof(fuzz_buf))) > 0 ? + #define __AFL_INIT() sync() +#endif +``` + ## 3) deferred initialization AFL tries to optimize performance by executing the targeted binary just once, |