mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/*
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* Copyright (C) 2015-2016 Apple Inc. 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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (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 "config.h"
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#include "NullSetterFunction.h"
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#include "CodeBlock.h"
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#include "JSCInlines.h"
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namespace JSC {
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const ClassInfo NullSetterFunction::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(NullSetterFunction) };
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#if ASSERT_ENABLED
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class GetCallerStrictnessFunctor {
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public:
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GetCallerStrictnessFunctor()
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: m_iterations(0)
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, m_callerIsStrict(false)
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{
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}
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StackVisitor::Status operator()(StackVisitor& visitor) const
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{
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++m_iterations;
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if (m_iterations < 2)
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return StackVisitor::Continue;
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CodeBlock* codeBlock = visitor->codeBlock();
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// This does not take into account that we might have an strict opcode in a non-strict context, but that's
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// ok since we assert below that this function should never be called from any kind strict context.
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m_callerIsStrict = codeBlock && codeBlock->ownerExecutable()->isInStrictContext();
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return StackVisitor::Done;
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}
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bool callerIsStrict() const { return m_callerIsStrict; }
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private:
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mutable int m_iterations;
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mutable bool m_callerIsStrict;
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};
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static bool callerIsStrict(VM& vm, CallFrame* callFrame)
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{
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GetCallerStrictnessFunctor iter;
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callFrame->iterate(vm, iter);
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return iter.callerIsStrict();
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}
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#endif // ASSERT_ENABLED
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namespace NullSetterFunctionInternal {
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static JSC_DECLARE_HOST_FUNCTION(callReturnUndefined);
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static JSC_DECLARE_HOST_FUNCTION(callThrowError);
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JSC_DEFINE_HOST_FUNCTION(callReturnUndefined, (JSGlobalObject* globalObject, CallFrame* callFrame))
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{
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#if !ASSERT_ENABLED
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UNUSED_PARAM(globalObject);
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UNUSED_PARAM(callFrame);
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#endif
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ASSERT(!callerIsStrict(globalObject->vm(), callFrame));
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return JSValue::encode(jsUndefined());
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}
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JSC_DEFINE_HOST_FUNCTION(callThrowError, (JSGlobalObject* globalObject, CallFrame*))
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{
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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// This function is only called from IC. And we do not want to include this frame in Error's stack.
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constexpr bool useCurrentFrame = false;
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throwException(globalObject, scope, ErrorInstance::create(globalObject, vm, globalObject->errorStructure(ErrorType::TypeError), ReadonlyPropertyWriteError, nullptr, TypeNothing, useCurrentFrame));
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return { };
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}
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}
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NullSetterFunction::NullSetterFunction(VM& vm, Structure* structure, ECMAMode ecmaMode)
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: Base(vm, structure, ecmaMode.isStrict() ? NullSetterFunctionInternal::callThrowError : NullSetterFunctionInternal::callReturnUndefined, nullptr)
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{
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}
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}
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