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| author | van Hauser <vh@thc.org> | 2020-05-02 00:39:13 +0200 |
|---|---|---|
| committer | van Hauser <vh@thc.org> | 2020-05-02 00:39:13 +0200 |
| commit | 378573ab8b2f9b150429503c649e86e0fed4e946 (patch) | |
| tree | 42fe481e36f554bd4f0033b5b96b422839b3cafb /llvm_mode/README.neverzero.md | |
| parent | 33ddf6ea0e090ec2ef18dfa7c53b4dfe8130de26 (diff) | |
| download | afl++-378573ab8b2f9b150429503c649e86e0fed4e946.tar.gz | |
AFL_LLVM_SKIP_NEVERZERO added
Diffstat (limited to 'llvm_mode/README.neverzero.md')
| -rw-r--r-- | llvm_mode/README.neverzero.md | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/llvm_mode/README.neverzero.md b/llvm_mode/README.neverzero.md index 1e406560..903e5bd3 100644 --- a/llvm_mode/README.neverzero.md +++ b/llvm_mode/README.neverzero.md @@ -20,8 +20,16 @@ This is implemented in afl-gcc, however for llvm_mode this is optional if the llvm version is below 9 - as there is a perfomance bug that is only fixed in version 9 and onwards. -If you want to enable this for llvm < 9 then set +If you want to enable this for llvm versions below 9 then set ``` export AFL_LLVM_NOT_ZERO=1 ``` + +In case you are on llvm 9 or greater and you do not want this behaviour then +you can set: +``` +AFL_LLVM_SKIP_NEVERZERO=1 +``` +If the target does not have extensive loops or functions that are called +a lot then this can give a small performance boost. |