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formatting and RedQueen reference added

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instrumentation/README.cmplog.md
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# CmpLog instrumentation # CmpLog instrumentation
The CmpLog instrumentation enables the logging of the comparisons operands in a The CmpLog instrumentation enables logging of comparison operands in a
shared memory. shared memory.
These values can be used by various mutators built on top of it. These values can be used by various mutators built on top of it.
At the moment we support the RedQueen mutator (input-2-state instructions only). At the moment we support the RedQueen mutator (input-2-state instructions only),
for details see [the RedQueen paper](https://www.syssec.ruhr-uni-bochum.de/media/emma/veroeffentlichungen/2018/12/17/NDSS19-Redqueen.pdf).
## Build ## Build
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The first version is built using the regular AFL++ instrumentation. The first version is built using the regular AFL++ instrumentation.
The second one, the CmpLog binary, with setting AFL_LLVM_CMPLOG during the compilation. The second one, the CmpLog binary, is built with setting AFL_LLVM_CMPLOG during the compilation.
For example: For example:
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./configure --cc=~/path/to/afl-clang-fast ./configure --cc=~/path/to/afl-clang-fast
make make
cp ./program ./program.cmplog cp ./program ./program.cmplog
unset AFL_LLVM_CMPLOG
``` ```
## Use ## Use
AFL++ has the new -c option that needs to be used to specify the CmpLog binary (the second AFL++ has the new `-c` option that needs to be used to specify the CmpLog binary (the second
build). build).
For example: For example: