mirror of
https://github.com/LadybirdBrowser/ladybird.git
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a6dfc74e93
Before this change, we were going through the chain of base classes for each IDL interface object and having them set the prototype to their prototype. Instead of doing that, reorder things so that we set the right prototype immediately in Foo::initialize(), and then don't bother in all the base class overrides. This knocks off a ~1% profile item on Speedometer 3.
150 lines
5 KiB
C++
150 lines
5 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Realm.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWasm/Types.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/TablePrototype.h>
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#include <LibWeb/WebAssembly/Table.h>
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#include <LibWeb/WebAssembly/WebAssembly.h>
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namespace Web::WebAssembly {
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GC_DEFINE_ALLOCATOR(Table);
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static Wasm::ValueType table_kind_to_value_type(Bindings::TableKind kind)
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{
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switch (kind) {
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case Bindings::TableKind::Externref:
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return Wasm::ValueType { Wasm::ValueType::ExternReference };
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case Bindings::TableKind::Anyfunc:
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return Wasm::ValueType { Wasm::ValueType::FunctionReference };
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}
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VERIFY_NOT_REACHED();
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}
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WebIDL::ExceptionOr<GC::Ref<Table>> Table::construct_impl(JS::Realm& realm, TableDescriptor& descriptor, JS::Value value)
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{
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auto& vm = realm.vm();
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auto reference_type = table_kind_to_value_type(descriptor.element);
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auto reference_value = vm.argument_count() == 1
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? Detail::default_webassembly_value(vm, reference_type)
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: TRY(Detail::to_webassembly_value(vm, value, reference_type));
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if (descriptor.maximum.has_value() && descriptor.maximum.value() < descriptor.initial)
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return vm.throw_completion<JS::RangeError>("Maximum should not be less than initial in table type"sv);
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Wasm::Limits limits { descriptor.initial, move(descriptor.maximum) };
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Wasm::TableType table_type { reference_type, move(limits) };
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auto& cache = Detail::get_cache(realm);
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auto address = cache.abstract_machine().store().allocate(table_type);
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if (!address.has_value())
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return vm.throw_completion<JS::TypeError>("Wasm Table allocation failed"sv);
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auto const& reference = reference_value.to<Wasm::Reference>();
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auto& table = *cache.abstract_machine().store().get(*address);
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for (auto& element : table.elements())
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element = reference;
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return realm.create<Table>(realm, *address);
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}
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Table::Table(JS::Realm& realm, Wasm::TableAddress address)
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: Bindings::PlatformObject(realm)
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, m_address(address)
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{
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}
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void Table::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE_WITH_CUSTOM_NAME(Table, WebAssembly.Table);
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Base::initialize(realm);
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-grow
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WebIDL::ExceptionOr<u32> Table::grow(u32 delta, JS::Value value)
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{
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auto& vm = this->vm();
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auto& cache = Detail::get_cache(realm());
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auto* table = cache.abstract_machine().store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table to grow"sv);
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auto initial_size = table->elements().size();
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auto reference_value = vm.argument_count() == 1
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? Detail::default_webassembly_value(vm, table->type().element_type())
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: TRY(Detail::to_webassembly_value(vm, value, table->type().element_type()));
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auto const& reference = reference_value.to<Wasm::Reference>();
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if (!table->grow(delta, reference))
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return vm.throw_completion<JS::RangeError>("Failed to grow table"sv);
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return initial_size;
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-get
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WebIDL::ExceptionOr<JS::Value> Table::get(u32 index) const
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{
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auto& vm = this->vm();
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auto& cache = Detail::get_cache(realm());
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auto* table = cache.abstract_machine().store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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if (table->elements().size() <= index)
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return vm.throw_completion<JS::RangeError>("Table element index out of range"sv);
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auto& ref = table->elements()[index];
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Wasm::Value wasm_value { ref };
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return Detail::to_js_value(vm, wasm_value, table->type().element_type());
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-set
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WebIDL::ExceptionOr<void> Table::set(u32 index, JS::Value value)
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{
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auto& vm = this->vm();
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auto& cache = Detail::get_cache(realm());
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auto* table = cache.abstract_machine().store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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if (table->elements().size() <= index)
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return vm.throw_completion<JS::RangeError>("Table element index out of range"sv);
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auto reference_value = vm.argument_count() == 1
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? Detail::default_webassembly_value(vm, table->type().element_type())
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: TRY(Detail::to_webassembly_value(vm, value, table->type().element_type()));
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auto const& reference = reference_value.to<Wasm::Reference>();
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table->elements()[index] = reference;
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return {};
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-length
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WebIDL::ExceptionOr<u32> Table::length() const
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{
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auto& vm = this->vm();
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auto& cache = Detail::get_cache(realm());
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auto* table = cache.abstract_machine().store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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return table->elements().size();
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}
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}
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