Stream: git-wasmtime

Topic: wasmtime / PR #9162 Update the consequences of disabling ...

Wasmtime GitHub notifications bot (Aug 22 2024 at 18:08):

alexcrichton requested elliottt for a review on PR #9162.

Wasmtime GitHub notifications bot (Aug 22 2024 at 18:08):

alexcrichton requested wasmtime-core-reviewers for a review on PR #9162.

Wasmtime GitHub notifications bot (Aug 22 2024 at 18:10):

alexcrichton opened PR #9162 from alexcrichton:update-with-gc-types-feature to bytecodealliance:main:

This commit updates what happens when the gc Cargo feature is disabled at compile time when compiling Wasmtime itself. Previously this would disable the reference-types proposal (and eventually once finished the gc/function-references proposal). This has the downside, however, of additionally disabling non-gc-related features that were bundled into the reference-types proposal such as multi-table and the encodings of table indices as LEBs in call_indirect instructions for example.

The change in this commit is to instead toggle the newly-added GC_TYPES feature in wasmparser. This feature does not correspond to upstream wasm proposals and instead only gates types such as externref or anyref. The funcref and exnref types are not gated as they're not expected to require a full GC.

This means that in Wasmtime the reference-types feature is now always active by default regardless of crate features. If the gc crate feature is disabled then only externref values are disallowed.

This additionally flags GC_TYPES as unsupported in Winch due to no support for externref yet. This means, though, that Winch can be considered as supporting the reference-types proposal (and things like multi-table) as expected. Disabling externref support switched a few tests to failing so those exceptions are now listed in tests/wast.rs

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Wasmtime GitHub notifications bot (Aug 22 2024 at 19:06):

elliottt submitted PR review.

Wasmtime GitHub notifications bot (Aug 22 2024 at 19:10):

fitzgen submitted PR review.

Wasmtime GitHub notifications bot (Aug 22 2024 at 21:44):

github-actions[bot] commented on PR #9162:

Label Messager: wasmtime:config

It looks like you are changing Wasmtime's configuration options. Make sure to
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Wasmtime GitHub notifications bot (Aug 22 2024 at 23:52):

alexcrichton updated PR #9162.

Wasmtime GitHub notifications bot (Aug 22 2024 at 23:52):

alexcrichton has enabled auto merge for PR #9162.

Wasmtime GitHub notifications bot (Aug 23 2024 at 14:50):

alexcrichton updated PR #9162.

Wasmtime GitHub notifications bot (Aug 23 2024 at 14:50):

alexcrichton has enabled auto merge for PR #9162.

Wasmtime GitHub notifications bot (Aug 23 2024 at 15:14):

alexcrichton merged PR #9162.

Last updated: Dec 06 2025 at 06:05 UTC