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Change proc_exit to unwind the stack rather than exiting the host process. (#1646)

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* Remove Cranelift's OutOfBounds trap, which is no longer used.

* Change proc_exit to unwind instead of exit the host process.

This implements the semantics in https://github.com/WebAssembly/WASI/pull/235.

Fixes #783.
Fixes #993.

* Fix exit-status tests on Windows.

* Revert the wiggle changes and re-introduce the wasi-common implementations.

* Move `wasi_proc_exit` into the wasmtime-wasi crate.

* Revert the spec_testsuite change.

* Remove the old proc_exit implementations.

* Make `TrapReason` an implementation detail.

* Allow exit status 2 on Windows too.

* Fix a documentation link.

* Really fix a documentation link.
This commit is contained in:
Dan Gohman
2020-05-13 15:59:43 -07:00
committed by GitHub
parent 08983bf39c
commit fb0b9e3ae6
27 changed files with 268 additions and 64 deletions
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2
crates/wasmtime/src/trampoline/func.rs
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@@ -54,7 +54,7 @@ unsafe extern "C" fn stub_fn(
// If a trap was raised (an error returned from the imported function)
// then we smuggle the trap through `Box<dyn Error>` through to the
// call-site, which gets unwrapped in `Trap::from_jit` later on as we
// call-site, which gets unwrapped in `Trap::from_runtime` later on as we
// convert from the internal `Trap` type to our own `Trap` type in this
// crate.
Ok(Err(trap)) => wasmtime_runtime::raise_user_trap(Box::new(trap)),