[webkit-changes] [WebKit/WebKit] 6032e1: [WASM] WASM GC Objects should have null prototype

[Yijia Huang]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 6032e158dbd5e3b8d9571f316d74a0d654ab954e
      https://github.com/WebKit/WebKit/commit/6032e158dbd5e3b8d9571f316d74a0d654ab954e
  Author: Yijia Huang <yijia_huang at apple.com>
  Date:   2025-01-21 (Tue, 21 Jan 2025)

  Changed paths:
    A JSTests/wasm/stress/wasm-gc-object-prototype.js
    M Source/JavaScriptCore/runtime/JSGlobalObject.h

  Log Message:
  -----------
  [WASM] WASM GC Objects should have null prototype
https://bugs.webkit.org/show_bug.cgi?id=286282
rdar://143291159

Reviewed by Yusuke Suzuki and Mark Lam.

Per the WebAssembly GC specification, WebAssembly GC objects (e.g.,
`WebAssembly.Struct` and `WebAssembly.Array`) must return a null
prototype [1]. This commit updates the `Structure`'s `prototypeBase`
for these objects to ensure compliance with the spec.

[1] https://github.com/WebAssembly/gc/blob/756060f5816c7e2159f4817fbdee76cf52f9c923/proposals/gc/MVP-JS.md?plain=1#L15-L25

* Source/JavaScriptCore/runtime/JSGlobalObject.h:
(JSC::JSGlobalObject::nullPrototype const):

Canonical link: https://commits.webkit.org/289191@main



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