mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-24 18:24:45 -05:00
7b863330dc
Roughly 7% of test-js runtime was spent creating FlyStrings from string literals. This patch frontloads that work and caches all the commonly used names in LibJS on a CommonPropertyNames struct that hangs off VM.
99 lines
3.5 KiB
C++
99 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <LibJS/Interpreter.h>
|
|
#include <LibJS/Runtime/BoundFunction.h>
|
|
#include <LibJS/Runtime/Function.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
|
|
namespace JS {
|
|
|
|
Function::Function(Object& prototype)
|
|
: Function(prototype, {}, {})
|
|
{
|
|
}
|
|
|
|
Function::Function(Object& prototype, Value bound_this, Vector<Value> bound_arguments)
|
|
: Object(prototype)
|
|
, m_bound_this(bound_this)
|
|
, m_bound_arguments(move(bound_arguments))
|
|
{
|
|
}
|
|
|
|
Function::~Function()
|
|
{
|
|
}
|
|
|
|
BoundFunction* Function::bind(Value bound_this_value, Vector<Value> arguments)
|
|
{
|
|
auto& vm = this->vm();
|
|
Function& target_function = is_bound_function() ? static_cast<BoundFunction&>(*this).target_function() : *this;
|
|
|
|
auto bound_this_object = [&vm, bound_this_value, this]() -> Value {
|
|
if (!m_bound_this.is_empty())
|
|
return m_bound_this;
|
|
switch (bound_this_value.type()) {
|
|
case Value::Type::Undefined:
|
|
case Value::Type::Null:
|
|
if (vm.in_strict_mode())
|
|
return bound_this_value;
|
|
return &global_object();
|
|
default:
|
|
return bound_this_value.to_object(global_object());
|
|
}
|
|
}();
|
|
|
|
i32 computed_length = 0;
|
|
auto length_property = get(vm.names.length);
|
|
if (vm.exception())
|
|
return nullptr;
|
|
if (length_property.is_number())
|
|
computed_length = max(0, length_property.as_i32() - static_cast<i32>(arguments.size()));
|
|
|
|
Object* constructor_prototype = nullptr;
|
|
auto prototype_property = target_function.get(vm.names.prototype);
|
|
if (vm.exception())
|
|
return nullptr;
|
|
if (prototype_property.is_object())
|
|
constructor_prototype = &prototype_property.as_object();
|
|
|
|
auto all_bound_arguments = bound_arguments();
|
|
all_bound_arguments.append(move(arguments));
|
|
|
|
return heap().allocate<BoundFunction>(global_object(), global_object(), target_function, bound_this_object, move(all_bound_arguments), computed_length, constructor_prototype);
|
|
}
|
|
|
|
void Function::visit_children(Visitor& visitor)
|
|
{
|
|
Object::visit_children(visitor);
|
|
|
|
visitor.visit(m_bound_this);
|
|
|
|
for (auto argument : m_bound_arguments)
|
|
visitor.visit(argument);
|
|
}
|
|
|
|
}
|