Check may-leave flags in trampolines, not Rust#12427
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alexcrichton merged 1 commit intobytecodealliance:mainfrom Feb 3, 2026
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Check may-leave flags in trampolines, not Rust#12427alexcrichton merged 1 commit intobytecodealliance:mainfrom
alexcrichton merged 1 commit intobytecodealliance:mainfrom
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This is a draft for now because the new tests I added are failing (some intrinsics aren't supporting being called in post-return for example) and I need to bottom that out. |
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In discussion with @dicej on this we see 1 of two paths forward:
We're currently thinking of pursuing (1) here pending if anyonoe has use cases on Zulip. |
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This commit moves all may-leave flag handling into compiled trampolines rather than doing this in Rust. This means it can't be forgotten on the Rust side of things and will be slightly more efficient to boot. This then additionally exempts some intrinsics from checking may-leave since Wasmtime erroneously checked when it shouldn't have. Closes bytecodealliance#12397 Closes bytecodealliance#12403
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This commit moves all may-leave flag handling into compiled trampolines rather than doing this in Rust. This means it can't be forgotten on the Rust side of things and will be slightly more efficient to boot. This then additionally exempts some intrinsics from checking may-leave since Wasmtime erroneously checked when it shouldn't have.
Closes #12397
Closes #12403