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Diffstat (limited to 'llvm_mode/README.laf-intel.md')
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diff --git a/llvm_mode/README.laf-intel.md b/llvm_mode/README.laf-intel.md new file mode 100644 index 00000000..d51c7e2f --- /dev/null +++ b/llvm_mode/README.laf-intel.md @@ -0,0 +1,25 @@ +# laf-intel instrumentation + +## Usage + +By default the passes will not run when you compile programs using +afl-clang-fast. Hence, you can use AFL as usual. +To enable the passes you must set environment variables before you +compile the target project. + +The following options exist: + +`export AFL_LLVM_LAF_SPLIT_SWITCHES=1` + +Enables the split-switches pass. + +`export AFL_LLVM_LAF_TRANSFORM_COMPARES=1` + +Enables the transform-compares pass (strcmp, memcmp, strncmp, strcasecmp, strncasecmp). + +`export AFL_LLVM_LAF_SPLIT_COMPARES=1` + +Enables the split-compares pass. +By default it will split all compares with a bit width <= 64 bits. +You can change this behaviour by setting `export AFL_LLVM_LAF_SPLIT_COMPARES_BITW=<bit_width>`. + |