Validate the size of defined component types - #2624
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fitzgen
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Aug 27, 2026
This commit is an implementation of WebAssembly/component-model#688 where the in-memory size of component model types is now calculated and validated to be below the static threshold. The eventual goal of this implementation is to simplify logic in Wasmtime for example and reduce the affect/possibility of integer overflow when handling otherwise very large types. The limits here are large enough that all preexisting components are expected to continue to validate.
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This commit is an implementation of WebAssembly/component-model#688 where the in-memory size of component model types is now calculated and validated to be below the static threshold. The eventual goal of this implementation is to simplify logic in Wasmtime for example and reduce the affect/possibility of integer overflow when handling otherwise very large types. The limits here are large enough that all preexisting components are expected to continue to validate.