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Add notes where not certain whether the error should crash or return false. Update header. |
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README.md | ||
libnfuzz.h | ||
libnfuzz.nim |
README.md
Introduction
libnfuzz
is a wrapper library that exports to C, a set of fuzzing test cases
written in Nim and making use of nim-beacon-chain.
Building
To build the wrapper library (for more details follow first the instructions from nim-beacon-chain):
git clone https://github.com/status-im/nim-beacon-chain.git
cd nim-beacon-chain
make
# static library
make libnfuzz.a
# dynamic loaded library
make libnfuzz.so
Default, the library is build with the minimal
config. To select a specific config you can instead run:
# build with mainnet config
make libnfuzz.a NIMFLAGS="-d:const_preset=mainnet"
For the library to be useful for fuzzing with libFuzzer (e.g. for integration with beacon-fuzz) we can pass additional Nim arguments, e.g.:
make libnfuzz.a NIMFLAGS="--cc:clang --passC:'-fsanitize=fuzzer-no-link' --passL='-fsanitize=fuzzer'"
To disable BLS verification on deserialization of SSZ objects add -d:ssz_testing
to the NIMFLAGS.
Other useful options might include: --clang.path:<path>
, --clang.exe:<exe>
, --clang.linkerexe:<exe>
, -d:const_preset=mainnet
It might also deem useful to lower the log level, e.g. by adding -d:chronicles_log_level=fatal
.
Usage
There is a libnfuzz.h
file provided for easy including in C or C++ projects.
It is most important that before any of the exported tests are called, the
NimMain()
call is done first. Additionally, all following library calls need
to be done from the same thread as from where the original NimMain()
call was
done.