[perf] WebAssembly.Memory is not resizable ArrayBuffer.

[loynoir]

Version

v23.4.0

Platform

docker archlinux latest

Subsystem

No response

What steps will reproduce the bug?

Not sure if it is a bug or not, WebAssembly.Memory is not resizable ArrayBuffer.

Did not benchmark, maybe related to perf.

https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Memory

The WebAssembly.Memory object is a resizable ArrayBuffer or SharedArrayBuffer that holds raw bytes of memory accessed by a WebAssembly.Instance.

rustwasm/wasm-bindgen#4416

> mod.__wasm.memory.buffer.resizable
false
> mod.__wasm.memory.buffer.byteLength 
1114112
> void (ab0 = mod.__wasm.memory.buffer)
undefined

> void mod.hello()
undefined
> mod.__wasm.memory.buffer.byteLength 
1179648
> void (ab1 = mod.__wasm.memory.buffer)
undefined
> ab1 === ab0
false

> memory.buffer.resize(memory.buffer.byteLength+65536)
Uncaught:
TypeError: Method ArrayBuffer.prototype.resize called on incompatible receiver #<ArrayBuffer>
    at ArrayBuffer.resize (<anonymous>)

How often does it reproduce? Is there a required condition?

No.

What is the expected behavior? Why is that the expected behavior?

WebAssembly.Memory is resizable ArrayBuffer.

What do you see instead?

WebAssembly.Memory is not resizable ArrayBuffer.

Additional information

No response

[legendecas]

This should be tracked in V8 issue tracker: https://issues.chromium.org/issues/42202693

[legendecas]

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