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Move spec interpreter fuzzing behind a Cargo feature (#3871)

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* Move spec interpreter fuzzing behind a Cargo feature

Building the spec interpreter requires a local installation of Ocaml and
now libgmp which isn't always available, so this enables the ability to
disable building the spec interpreter by using `cargo +nightly fuzz
build --no-default-features`. The spec interpreter is still built by
default but if fuzzers are being built locally and the spec interpreter
isn't needed then this should enable it to be relatively easily
opted-out of.

* Tweak manifest directives
This commit is contained in:
Alex Crichton
2022-03-02 14:29:25 -06:00
committed by GitHub
parent 1fb71fa1ea
commit 7d1bc7d808
3 changed files with 42 additions and 43 deletions
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12
crates/fuzzing/Cargo.toml
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@@ -22,7 +22,7 @@ wasmtime-wast = { path = "../wast" }
wasm-encoder = "0.10.0"
wasm-smith = "0.9.0"
wasm-mutate = "0.2"
wasm-spec-interpreter = { path = "./wasm-spec-interpreter" }
wasm-spec-interpreter = { path = "./wasm-spec-interpreter", optional = true }
wasmi = "0.7.0"
# We rely on precompiled v8 binaries, but rusty-v8 doesn't have a precompiled
@@ -35,7 +35,11 @@ v8 = "0.33"
[dev-dependencies]
wat = "1.0.37"
# We only build the library containing the OCaml spec interpreter if the OCaml
# toolchain is available--which is assumed here to be the case when fuzzing.
# Only enable the `build-libinterpret` feature when fuzzing is enabled, enabling
# commands like `cargo test --workspace` or similar to not need an ocaml
# installation and only fuzzers need it by default.
[target.'cfg(fuzzing)'.dependencies]
wasm-spec-interpreter = { path = "./wasm-spec-interpreter", features = ["build-libinterpret"] }
wasm-spec-interpreter = { path = "./wasm-spec-interpreter", optional = true, features = ['build-libinterpret'] }
[features]
fuzz-spec-interpreter = ['wasm-spec-interpreter']