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Restore POSIX signal handling on MacOS behind a feature flag (#3063)

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* Restore POSIX signal handling on MacOS behind a feature flag

As described in Issue #3052, the switch to Mach Exception handling
removed `unix::StoreExt` from the public API of crate on MacOS.
That is a breaking change and makes it difficult for some
application to upgrade to the current stable Wasmtime.

As a workaround this PR introduces a feature flag called
`posix-signals-on-macos` that restores the old behaviour on MacOS.
The flag is disabled by default.

* Fix test guard

* Fix formatting in the test
This commit is contained in:
Ulan Degenbaev
2021-07-12 23:25:44 +02:00
committed by GitHub
parent 808582826b
commit f08491eeca
7 changed files with 99 additions and 4 deletions
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crates/runtime/Cargo.toml
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@@ -48,3 +48,8 @@ async = ["wasmtime-fiber"]
# Enables support for userfaultfd in the pooling allocator when building on Linux
uffd = ["userfaultfd"]
# Enables trap handling using POSIX signals instead of Mach exceptions on MacOS.
# It is useful for applications that do not bind their own exception ports and
# need portable signal handling.
posix-signals-on-macos = []