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Crossy

This is the code repository accompanying our ACM AsiaCCS '24 paper "Cross-Language Differential Testing of JSON Parsers".

Note: We are still in the process of publishing this repository. Currently, the build process and preliminary fuzzing of C/C++/Rust/Java projects are possible. We unfortunately encountered some problems with Python projects, and the poco parser which we are going to fix in the following weeks.

Setup

This repository consists of two collections of source code. The first is our crossy framework that is located in src/. The second are the JSON parsers located in experiments/json. By running

make

you spawn a series of self-contained docker containers that build the respective projects (e.g., Dockerfile.crossy for Crossy and experiments/json/shared-objects/libs/jsmn/Dockerfile.jsmn for the jsmn parser).

Fuzzing

Note: We are still in the process of publishing this repository. We are going to add our evaluation scripts once we adapted them for the published version. For now, please see src/cli.cpp for a list of available options for crossy.

Afterwards, you can run:

make run

to spawn a docker container for running the fuzzer. In the docker container you can run:

./build/crossy \
    configs/json/* \
    -o ./output/ \
    -- \
    corpus \
    -detect_leaks=0 \
    -artifact_prefix=./output/