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Dan Gohman
2018-10-05 16:44:13 -07:00
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cranelift/FUZZING.md
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# Fuzzing
This document describes how to fuzz cranelift with [`cargo-fuzz`](https://github.com/rust-fuzz/cargo-fuzz). The fuzz targets use `wasm-opt` from [`binaryen-rs`](https://github.com/pepyakin/binaryen-rs) to generate valid WebAssembly modules from the fuzzed input supplied by `cargo-fuzz` (via [libfuzzer](http://llvm.org/docs/LibFuzzer.html)). In this scheme coverage feedback from both cranelift and the `wasm-opt` input generation code is used to inform the fuzzer.
This document describes how to fuzz cranelift with [`cargo-fuzz`]. The fuzz targets use `wasm-opt`
from [`binaryen-rs`] to generate valid WebAssembly modules from the fuzzed input supplied by
`cargo-fuzz` (via [libfuzzer]). In this scheme coverage feedback from both cranelift and the
`wasm-opt` input generation code is used to inform the fuzzer.
[`cargo-fuzz`]: https://github.com/rust-fuzz/cargo-fuzz
[`binaryen-rs`]: https://github.com/pepyakin/binaryen-rs
[libfuzzer]: http://llvm.org/docs/LibFuzzer.html
# Usage