1/*
2 * Copyright (C) 2016-2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ClassInfo.h"
29#include "DOMJITEffect.h"
30#include "SpeculatedType.h"
31
32namespace JSC { namespace DOMJIT {
33
34// FIXME: Currently, we only support functions which arguments are up to 2.
35// Eventually, we should extend this. But possibly, 2 or 3 can cover typical use cases.
36// https://bugs.webkit.org/show_bug.cgi?id=164346
37#define JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS 2
38#define JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS_INCLUDING_THIS (1 + JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS)
39
40using FunctionPtr = void (*WTF_VTBL_FUNCPTR_PTRAUTH(DOMJITFunctionPtrTag))();
41
42class Signature {
43public:
44 template<typename... Arguments>
45 constexpr Signature(CFunctionPtr functionWithoutTypeCheck, const ClassInfo* classInfo, Effect effect, SpeculatedType result, Arguments... arguments)
46 : functionWithoutTypeCheck(functionWithoutTypeCheck.get())
47 , classInfo(classInfo)
48 , result(result)
49 , arguments {static_cast<SpeculatedType>(arguments)...}
50 , argumentCount(sizeof...(Arguments))
51 , effect(effect)
52 {
53 }
54
55 const FunctionPtr functionWithoutTypeCheck;
56 const ClassInfo* const classInfo;
57 const SpeculatedType result;
58 const SpeculatedType arguments[JSC_DOMJIT_SIGNATURE_MAX_ARGUMENTS];
59 const unsigned argumentCount;
60 const Effect effect;
61};
62
63} }
64