RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 09:47:35 +00:00
Code Issues Activity Actions

LibJS+LibWeb: Implement resizable ArrayBuffer support for TypedArray

Browse source 
This is (part of) a normative change in the ECMA-262 spec. See:
a9ae96e
This commit is contained in:
Timothy Flynn 2023-12-24 14:55:10 -05:00 • committed by Andreas Kling
parent c7fec9424c
commit 9258d7b98a
47 changed files with 2059 additions and 884 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Userland/Libraries/LibWeb/Crypto/Crypto.cpp
View file

@ -49,13 +49,17 @@ WebIDL::ExceptionOr<JS::Handle<WebIDL::ArrayBufferView>> Crypto::get_random_valu
if (!array->is_typed_array_base())
return WebIDL::TypeMismatchError::create(realm(), "array must be one of Int8Array, Uint8Array, Uint8ClampedArray, Int16Array, Uint16Array, Int32Array, Uint32Array, BigInt64Array, or BigUint64Array"_fly_string);
auto const& typed_array = *array->bufferable_object().get<JS::NonnullGCPtr<JS::TypedArrayBase>>();
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(typed_array, JS::ArrayBuffer::Order::SeqCst);
// IMPLEMENTATION DEFINED: If the viewed array buffer is out-of-bounds, throw a InvalidStateError and terminate the algorithm.
if (JS::is_typed_array_out_of_bounds(typed_array_record))
return WebIDL::InvalidStateError::create(realm(), MUST(String::formatted(JS::ErrorType::BufferOutOfBounds.message(), "TypedArray"sv)));
// 2. If the byteLength of array is greater than 65536, throw a QuotaExceededError and terminate the algorithm.
if (array->viewed_array_buffer()->byte_length() > 65536)
if (JS::typed_array_byte_length(typed_array_record) > 65536)
return WebIDL::QuotaExceededError::create(realm(), "array's byteLength may not be greater than 65536"_fly_string);
// IMPLEMENTATION DEFINED: If the viewed array buffer is detached, throw a InvalidStateError and terminate the algorithm.
if (array->viewed_array_buffer()->is_detached())
return WebIDL::InvalidStateError::create(realm(), "array is detached"_fly_string);
// FIXME: Handle SharedArrayBuffers
// 3. Overwrite all elements of array with cryptographically strong random values of the appropriate type.

11
Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
View file

@ -526,9 +526,7 @@ private:
if constexpr (IsSame<ViewType, JS::DataView>) {
return JS::make_data_view_with_buffer_witness_record(view, JS::ArrayBuffer::Order::SeqCst);
} else {
// FIXME: Create a TypedArray record when TypedArray supports resizable ArrayBuffer objects.
TODO();
return 0;
return JS::make_typed_array_with_buffer_witness_record(view, JS::ArrayBuffer::Order::SeqCst);
}
}();
@ -537,7 +535,8 @@ private:
if (JS::is_view_out_of_bounds(view_record))
return WebIDL::DataCloneError::create(*m_vm.current_realm(), MUST(String::formatted(JS::ErrorType::BufferOutOfBounds.message(), "DataView"sv)));
} else {
// FIXME: Check TypedArray bounds when TypedArray supports resizable ArrayBuffer objects.
if (JS::is_typed_array_out_of_bounds(view_record))
return WebIDL::DataCloneError::create(*m_vm.current_realm(), MUST(String::formatted(JS::ErrorType::BufferOutOfBounds.message(), "TypedArray"sv)));
}
// 2. Let buffer be the value of value's [[ViewedArrayBuffer]] internal slot.
@ -570,9 +569,9 @@ private:
vector.append(ValueTag::ArrayBufferView);
vector.extend(move(buffer_serialized)); // [[ArrayBufferSerialized]]
TRY(serialize_string(vector, view.element_name())); // [[Constructor]]
vector.append(view.byte_length());
vector.append(JS::typed_array_byte_length(view_record));
vector.append(view.byte_offset());
vector.append(view.array_length());
vector.append(JS::typed_array_length(view_record));
}
return {};
}

17
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
View file

@ -2041,14 +2041,17 @@ WebIDL::ExceptionOr<void> readable_byte_stream_controller_enqueue(ReadableByteSt
// 4. Let byteOffset be chunk.[[ByteOffset]].
auto byte_offset = typed_array->byte_offset();
// 5. Let byteLength be chunk.[[ByteLength]].
auto byte_length = typed_array->byte_length();
// 6. If ! IsDetachedBuffer(buffer) is true, throw a TypeError exception.
if (buffer->is_detached()) {
auto error = JS::TypeError::create(realm, "Buffer is detached"sv);
return JS::throw_completion(error);
}
// FIXME: The streams spec has not been updated for resizable ArrayBuffer objects. We must perform step 6 before
// invoking TypedArrayByteLength in step 5. We also must check if the array is out-of-bounds, rather than
// just detached.
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(*typed_array, JS::ArrayBuffer::Order::SeqCst);
if (JS::is_typed_array_out_of_bounds(typed_array_record))
return vm.throw_completion<JS::TypeError>(JS::ErrorType::BufferOutOfBounds, "TypedArray"sv);
// 5. Let byteLength be chunk.[[ByteLength]].
auto byte_length = JS::typed_array_byte_length(typed_array_record);
// 7. Let transferredBuffer be ? TransferArrayBuffer(buffer).
auto transferred_buffer = TRY(transfer_array_buffer(realm, *buffer));

7
Userland/Libraries/LibWeb/WebAssembly/WebAssembly.cpp
View file

@ -309,7 +309,12 @@ JS::ThrowCompletionOr<size_t> parse_module(JS::VM& vm, JS::Object* buffer_object
data = buffer.buffer();
} else if (is<JS::TypedArrayBase>(buffer_object)) {
auto& buffer = static_cast<JS::TypedArrayBase&>(*buffer_object);
data = buffer.viewed_array_buffer()->buffer().span().slice(buffer.byte_offset(), buffer.byte_length());
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(buffer, JS::ArrayBuffer::Order::SeqCst);
if (JS::is_typed_array_out_of_bounds(typed_array_record))
return vm.throw_completion<JS::TypeError>(JS::ErrorType::BufferOutOfBounds, "TypedArray"sv);
data = buffer.viewed_array_buffer()->buffer().span().slice(buffer.byte_offset(), JS::typed_array_byte_length(typed_array_record));
} else if (is<JS::DataView>(buffer_object)) {
auto& buffer = static_cast<JS::DataView&>(*buffer_object);

8
Userland/Libraries/LibWeb/WebIDL/AbstractOperations.cpp
View file

@ -38,6 +38,12 @@ ErrorOr<ByteBuffer> get_buffer_source_copy(JS::Object const& buffer_source)
if (is<JS::TypedArrayBase>(buffer_source)) {
auto const& es_buffer_source = static_cast<JS::TypedArrayBase const&>(buffer_source);
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(es_buffer_source, JS::ArrayBuffer::Order::SeqCst);
// AD-HOC: The WebIDL spec has not been updated for resizable ArrayBuffer objects. This check follows the behavior of step 7.
if (JS::is_typed_array_out_of_bounds(typed_array_record))
return ByteBuffer {};
// 1. Set esArrayBuffer to esBufferSource.[[ViewedArrayBuffer]].
es_array_buffer = es_buffer_source.viewed_array_buffer();
@ -45,7 +51,7 @@ ErrorOr<ByteBuffer> get_buffer_source_copy(JS::Object const& buffer_source)
offset = es_buffer_source.byte_offset();
// 3. Set length to esBufferSource.[[ByteLength]].
length = es_buffer_source.byte_length();
length = JS::typed_array_byte_length(typed_array_record);
} else if (is<JS::DataView>(buffer_source)) {
auto const& es_buffer_source = static_cast<JS::DataView const&>(buffer_source);

11
Userland/Libraries/LibWeb/WebIDL/Buffers.cpp
View file

@ -13,7 +13,16 @@ namespace Web::WebIDL {
u32 BufferableObjectBase::byte_length() const
{
return m_bufferable_object.visit([](auto& obj) { return static_cast<u32>(obj->byte_length()); });
return m_bufferable_object.visit(
[](JS::NonnullGCPtr<JS::TypedArrayBase> typed_array) {
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(typed_array, JS::ArrayBuffer::Order::SeqCst);
return JS::typed_array_byte_length(typed_array_record);
},
[](JS::NonnullGCPtr<JS::DataView> data_view) {
auto view_record = JS::make_data_view_with_buffer_witness_record(data_view, JS::ArrayBuffer::Order::SeqCst);
return JS::get_view_byte_length(view_record);
},
[](JS::NonnullGCPtr<JS::ArrayBuffer> array_buffer) { return static_cast<u32>(array_buffer->byte_length()); });
}
JS::NonnullGCPtr<JS::Object> BufferableObjectBase::raw_object()