Merge #768

768: [new fuzzer] wasmer compile method r=syrusakbary a=pventuzelo

Useful to fuzz wasmer compile method and cranelift library

Co-authored-by: Patrick Ventuzelo <ventuzelo.patrick@gmail.com>
Co-authored-by: Syrus Akbary <me@syrusakbary.com>

fuzz/Cargo.toml

@@ -25,3 +25,7 @@ path = "fuzz_targets/simple_instantiate.rs"
 [[bin]]
 name = "validate_wasm"
 path = "fuzz_targets/validate_wasm.rs"
+
+[[bin]]
+name = "compile_wasm"
+path = "fuzz_targets/compile_wasm.rs"

fuzz/README.md

@@ -10,7 +10,7 @@ $ cargo install cargo-fuzz
 
 `cargo-fuzz` is documented in the [Rust Fuzz Book](https://rust-fuzz.github.io/book/cargo-fuzz.html).
 
-## Running a fuzzer (simple_instantiate, validate_wasm)
+## Running a fuzzer (simple_instantiate, validate_wasm, compile_wasm)
 
 Once `cargo-fuzz` is installed, you can run the `simple_instantiate` fuzzer with
 ```sh
@@ -20,6 +20,10 @@ or the `validate_wasm` fuzzer
 ```sh
 cargo fuzz run validate_wasm
 ```
+or the `compile_wasm` fuzzer
+```sh
+cargo fuzz run compile_wasm
+```
 
 You should see output that looks something like this:
 

fuzz/fuzz_targets/compile_wasm.rs

@@ -0,0 +1,10 @@
+#![no_main]
+#[macro_use]
+extern crate libfuzzer_sys;
+extern crate wasmer_runtime;
+
+use wasmer_runtime::compile;
+
+fuzz_target!(|data: &[u8]| {
+    let _ = compile(data);
+});