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d3dfd55472
Instead of performing a prototype transition for every new object we
create via {}, prebake the object returned by Object::create_empty()
with a shape with ObjectPrototype as the prototype.
We also prebake the shape for the object assigned to the "prototype"
property of new ScriptFunction objects, since those are extremely
common and that code broke from this change anyway.
This avoid a large number of transitions and is a small speed-up on
test-js.
106 lines
4 KiB
C++
106 lines
4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS {
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class GlobalObject : public Object {
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JS_OBJECT(GlobalObject, Object);
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public:
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explicit GlobalObject();
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virtual void initialize();
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virtual ~GlobalObject() override;
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Console& console() { return *m_console; }
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Shape* empty_object_shape() { return m_empty_object_shape; }
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Shape* new_object_shape() { return m_new_object_shape; }
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Shape* new_script_function_prototype_object_shape() { return m_new_script_function_prototype_object_shape; }
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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ConstructorName* snake_name##_constructor() { return m_##snake_name##_constructor; } \
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Object* snake_name##_prototype() { return m_##snake_name##_prototype; }
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JS_ENUMERATE_BUILTIN_TYPES
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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Object* snake_name##_prototype() { return m_##snake_name##_prototype; }
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JS_ENUMERATE_ITERATOR_PROTOTYPES
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#undef __JS_ENUMERATE
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protected:
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virtual void visit_children(Visitor&) override;
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template<typename ConstructorType>
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void add_constructor(const FlyString& property_name, ConstructorType*&, Object& prototype);
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private:
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JS_DECLARE_NATIVE_FUNCTION(gc);
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JS_DECLARE_NATIVE_FUNCTION(is_nan);
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JS_DECLARE_NATIVE_FUNCTION(is_finite);
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JS_DECLARE_NATIVE_FUNCTION(parse_float);
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NonnullOwnPtr<Console> m_console;
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Shape* m_empty_object_shape { nullptr };
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Shape* m_new_object_shape { nullptr };
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Shape* m_new_script_function_prototype_object_shape { nullptr };
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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ConstructorName* m_##snake_name##_constructor { nullptr }; \
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Object* m_##snake_name##_prototype { nullptr };
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JS_ENUMERATE_BUILTIN_TYPES
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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Object* m_##snake_name##_prototype { nullptr };
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JS_ENUMERATE_ITERATOR_PROTOTYPES
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#undef __JS_ENUMERATE
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};
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template<typename ConstructorType>
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inline void GlobalObject::add_constructor(const FlyString& property_name, ConstructorType*& constructor, Object& prototype)
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{
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auto& vm = this->vm();
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constructor = heap().allocate<ConstructorType>(*this, *this);
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constructor->define_property(vm.names.name, js_string(heap(), property_name), Attribute::Configurable);
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if (vm.exception())
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return;
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prototype.define_property(vm.names.constructor, constructor, Attribute::Writable | Attribute::Configurable);
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if (vm.exception())
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return;
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define_property(property_name, constructor, Attribute::Writable | Attribute::Configurable);
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}
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}
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