* Add wasm-tools repository to wasmtime project
This commit expands the fuzzers run under the Wasmtime project to
include those in the https://github.com/bytecodealliance/wasm-tools
repository. This includes various parsing for utilities used by Wasmtime
itself but also generally useful for other Rust projects! The
maintainers of the wasm-tools repository are also all currently all on
the notification list for Wasmtime fuzz bugs as well.
* Load all corpuses from wasmtime-libfuzzer-corpus
* Simplify rust project setup.
- Add rust and cargo-fuzz in base builder.
- Set RUSTC_BOOSTRAP to make ASan available.
- Set RUSTFLAGS and C,CXXFLAGS properly.
This is an attempt to apply the suggestions from #3316 to the fuzzing
infrastructure for the `wasmtime` target. This will hopefully allow the
delivery of SIGSEGV and SIGILL signals to the `wasmtime` program itself.
These are expected signals when executing wasm code so we don't want the
fuzzer to treat all forms of the signal as a fatal error.
This is an attempt to fixup the errors found on #3292. Although I'm not
certain where the error was coming from this switches the Rust
installation to being in `PATH` by default so there's no need to
`source` any scripts to get access to the Rust compiler.
Alex Crichton