48 lines
1.5 KiB
Rust
48 lines
1.5 KiB
Rust
//! Fuzzing infrastructure for Wasmtime.
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#![deny(missing_docs, missing_debug_implementations)]
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pub mod generators;
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pub mod oracles;
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/// One time start up initialization for fuzzing:
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///
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/// * Enables `env_logger`.
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///
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/// * Restricts `rayon` to a single thread in its thread pool, for more
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/// deterministic executions.
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///
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/// If a fuzz target is taking raw input bytes from the fuzzer, it is fine to
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/// call this function in the fuzz target's oracle or in the fuzz target
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/// itself. However, if the fuzz target takes an `Arbitrary` type, and the
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/// `Arbitrary` implementation is not derived and does interesting things, then
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/// the `Arbitrary` implementation should call this function, since it runs
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/// before the fuzz target itself.
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pub(crate) fn init_fuzzing() {
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static INIT: std::sync::Once = std::sync::Once::new();
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INIT.call_once(|| {
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let _ = env_logger::try_init();
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let _ = rayon::ThreadPoolBuilder::new()
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.num_threads(1)
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.build_global();
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})
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}
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/// Create default fuzzing config with given strategy
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pub fn fuzz_default_config(strategy: wasmtime::Strategy) -> anyhow::Result<wasmtime::Config> {
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init_fuzzing();
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let mut config = wasmtime::Config::new();
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config
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.cranelift_nan_canonicalization(true)
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.wasm_bulk_memory(true)
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.wasm_reference_types(true)
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.wasm_module_linking(true)
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.wasm_multi_memory(true)
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.wasm_simd(true)
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.wasm_memory64(true)
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.strategy(strategy)?;
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Ok(config)
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}
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