25d3fa4d7b
This commit removes the `differential_spec` fuzz target for now, although this removal is intended to be temporary. We have #3251 to track re-enabling the spec interpreter in a way that it won't time out, and additionally the spec interpreter is also failing to build with ocaml on oss-fuzz so that will also need to be investigated when re-enabling.
wasm-spec-interpreter
This project shows how to use ocaml-interop to call into the Wasm spec
interpreter. There are several steps to making this work:
- building the OCaml Wasm spec interpreter as a static library
- building a Rust-to-OCaml FFI bridge using
ocaml-interopand a custom OCaml wrapper - linking both things into a Rust crate
Dependencies
This crate only builds in an environment with:
make(the Wasm spec interpreter uses aMakefile)ocamlopt,ocamlbuild(available with, e.g.,dnf install ocaml)- Linux tools (e.g.
ar); currently it is easiest to build the static libraries in a single environment but this could be fixed in the future (TODO)
Remember to retrieve the Wasm spec submodule:
git clone ... --recursive
Build
RUSTFLAGS=--cfg=fuzzing cargo build
Use FFI_LIB_DIR=path/to/lib/... to specify a different location for the static
library (this is mainly for debugging). If the --cfg=fuzzing configuration is
not provided, this crate will build successfully but fail at runtime.
Test
RUSTFLAGS=--cfg=fuzzing cargo test