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LibJS+LibWeb: Implement resizable ArrayBuffer support for DataView

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This is (part of) a normative change in the ECMA-262 spec. See:
a9ae96e
This commit is contained in:
Timothy Flynn 2023-10-15 09:46:09 -04:00 • committed by Andreas Kling
parent 29ac6e3689
commit c7fec9424c
12 changed files with 377 additions and 94 deletions
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7
Userland/Libraries/LibWeb/WebAssembly/WebAssembly.cpp
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@ -312,7 +312,12 @@ JS::ThrowCompletionOr<size_t> parse_module(JS::VM& vm, JS::Object* buffer_object
data = buffer.viewed_array_buffer()->buffer().span().slice(buffer.byte_offset(), buffer.byte_length());
} else if (is<JS::DataView>(buffer_object)) {
auto& buffer = static_cast<JS::DataView&>(*buffer_object);
data = buffer.viewed_array_buffer()->buffer().span().slice(buffer.byte_offset(), buffer.byte_length());
auto view_record = JS::make_data_view_with_buffer_witness_record(buffer, JS::ArrayBuffer::Order::SeqCst);
if (JS::is_view_out_of_bounds(view_record))
return vm.throw_completion<JS::TypeError>(JS::ErrorType::BufferOutOfBounds, "DataView"sv);
data = buffer.viewed_array_buffer()->buffer().span().slice(buffer.byte_offset(), JS::get_view_byte_length(view_record));
} else {
return vm.throw_completion<JS::TypeError>("Not a BufferSource"sv);
}