CountBleck f2a170bcfb LibWeb: Implement the WebAssembly "Memory object cache" + other changes ...

This cache is referenced by a few parts of the JS API spec, including
the threads spec (such as in toFixedLengthBuffer), as well as the
"refresh the Memory buffer" algorithm, which was implemented as a method
of Memory before this change.

Now, this algorithm can be implemented in a spec-like fashion (though it
mostly seems to add extra complexity). This change also fixes a bug
where memories that were re-exported from an imported WebAssembly.Memory
were given a distinct WebAssembly.Memory object, since the caching that
existed in Instance.cpp was instance-local, not global to the realm.

We also make Memory::m_buffer non-lazy, since we have to implement
"initialize a memory object" correctly anyway.

2025-08-23 08:26:23 +02:00

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