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Diffstat (limited to 'docs/env_variables.md')
| -rw-r--r-- | docs/env_variables.md | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/docs/env_variables.md b/docs/env_variables.md index ed81c8a3..f5d28981 100644 --- a/docs/env_variables.md +++ b/docs/env_variables.md @@ -116,6 +116,9 @@ Then there are a few specific features that are only available in llvm_mode: afl-clang-lto/afl-clang-lto++ instead of afl-clang-fast, but is only built if LLVM 11 or newer is used. + - AFL_LLVM_INSTRUMENT=CFG will use Control Flow Graph instrumentation. + (recommended) + - AFL_LLVM_LTO_AUTODICTIONARY will generate a dictionary in the target binary based on string compare and memory compare functions. afl-fuzz will automatically get these transmitted when starting to @@ -139,7 +142,13 @@ Then there are a few specific features that are only available in llvm_mode: ### INSTRIM - This feature increases the speed by ~15% without any disadvantages. + This feature increases the speed by ~15% without any disadvantages to the + classic instrumentation. + + Note that there is also an LTO version (if you have llvm 11 or higher) - + that is the best instrumentation we have. Use `afl-clang-lto` to activate. + The InsTrim LTO version additionally has all the options and features of + LTO (see above). - Setting AFL_LLVM_INSTRIM or AFL_LLVM_INSTRUMENT=CFG to activates this mode |