[Webkit-unassigned] [Bug 246769] New: [Wasm-GC] Implement initial minimal JS API for Wasm GC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=246769

            Bug ID: 246769
           Summary: [Wasm-GC] Implement initial minimal JS API for Wasm GC
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebAssembly
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: asumu at igalia.com

The Wasm GC proposal will likely adopt a minimal initial JS API as described here: https://github.com/WebAssembly/gc/issues/279

This bug is for the initial implementation of that JS API. The changes this will require in JSC are to allow structs/arrays to pass out of Wasm to JS (this currently throws), and then ensure that those objects appear frozen (and most operations on them should throw).

There are also a few places where conversion operations are needed, such as for globals and tables. And also for i31ref values, which require a conversion from appropriate Number values (this is a no-op if the JS representation is an integer, but may require a conversion if it's represented as a double).

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