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/*
* Copyright (C) 2016-2022 Apple Inc. 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 APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#include "ClassInfo.h"
#include "DOMJITEffect.h"
#include "SpeculatedType.h"
#include <wtf/CodePtr.h>
namespace JSC { namespace DOMJIT {
// FIXME: Currently, we only support functions which arguments are up to 2.
// Eventually, we should extend this. But possibly, 2 or 3 can cover typical use cases.
// https://bugs.webkit.org/show_bug.cgi?id=164346
#define JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS 2
#define JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS_INCLUDING_THIS (1 + JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS)
class Signature {
public:
using CodePtr = WTF::CodePtr<CFunctionPtrTag>;
template<typename... Arguments>
constexpr Signature(CodePtr functionWithoutTypeCheck, const ClassInfo* classInfo, Effect effect, SpeculatedType result, Arguments... arguments)
: functionWithoutTypeCheckPtr(functionWithoutTypeCheck.untypedFunc())
, classInfo(classInfo)
, result(result)
, arguments {static_cast<SpeculatedType>(arguments)...}
, argumentCount(sizeof...(Arguments))
, effect(effect)
{
}
CodePtr functionWithoutTypeCheck() const { return CodePtr(functionWithoutTypeCheckPtr); }
const WTF_VTBL_FUNCPTR_PTRAUTH(DOMJITSignature) CodePtr::UntypedFunc functionWithoutTypeCheckPtr;
const ClassInfo* const classInfo;
const SpeculatedType result;
const SpeculatedType arguments[JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS];
const unsigned argumentCount;
const Effect effect;
};
} }
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