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da177c6517
The previous handling of the name and message properties specifically was breaking websites that created their own error types and relied on the error prototype working correctly - not assuming an JS::Error this object, that is. The way it works now, and it is supposed to work, is: - Error.prototype.name and Error.prototype.message just have initial string values and are no longer getters/setters - When constructing an error with a message, we create a regular property on the newly created object, so a lookup of the message property will either get it from the object directly or go though the prototype chain - Internal m_name/m_message properties are no longer needed and removed This makes printing errors slightly more complicated, as we can no longer rely on the (safe) internal properties, and cannot trust a property lookup either - get_without_side_effects() is used to solve this, it's not perfect but something we can revisit later. I did some refactoring along the way, there was some really old stuff in there - accessing vm.call_frame().arguments[0] is not something we (have to) do anymore :^) Fixes #6245.
99 lines
5.1 KiB
C++
99 lines
5.1 KiB
C++
/*
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* Copyright (c) 2020-2021, Linus Groh <mail@linusgroh.de>
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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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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/ErrorConstructor.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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ErrorConstructor::ErrorConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.Error, *global_object.function_prototype())
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{
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}
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void ErrorConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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define_property(vm.names.prototype, global_object.error_prototype(), 0);
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define_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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Value ErrorConstructor::call()
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{
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return construct(*this);
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}
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Value ErrorConstructor::construct(Function&)
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{
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auto& vm = this->vm();
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String message;
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if (!vm.argument(0).is_undefined()) {
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message = vm.argument(0).to_string(global_object());
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if (vm.exception())
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return {};
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}
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return Error::create(global_object(), message);
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}
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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ConstructorName::ConstructorName(GlobalObject& global_object) \
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: NativeFunction(*global_object.function_prototype()) \
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{ \
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} \
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\
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void ConstructorName::initialize(GlobalObject& global_object) \
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{ \
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auto& vm = this->vm(); \
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NativeFunction::initialize(global_object); \
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define_property(vm.names.prototype, global_object.snake_name##_prototype(), 0); \
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define_property(vm.names.length, Value(1), Attribute::Configurable); \
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} \
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\
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ConstructorName::~ConstructorName() { } \
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\
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Value ConstructorName::call() \
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{ \
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return construct(*this); \
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} \
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\
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Value ConstructorName::construct(Function&) \
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{ \
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auto& vm = this->vm(); \
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String message = ""; \
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if (!vm.argument(0).is_undefined()) { \
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message = vm.argument(0).to_string(global_object()); \
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if (vm.exception()) \
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return {}; \
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} \
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return ClassName::create(global_object(), message); \
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}
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JS_ENUMERATE_ERROR_SUBCLASSES
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#undef __JS_ENUMERATE
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}
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