1/*
2 * Copyright (C) 2017-2019 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#if ENABLE(WEBASSEMBLY)
29
30#include "JSWebAssemblyCodeBlock.h"
31#include "WebAssemblyFunctionBase.h"
32
33namespace JSC {
34
35using Wasm::WasmToWasmImportableFunction;
36
37class WebAssemblyWrapperFunction final : public WebAssemblyFunctionBase {
38public:
39 using Base = WebAssemblyFunctionBase;
40
41 static constexpr unsigned StructureFlags = Base::StructureFlags;
42
43 template<typename CellType, SubspaceAccess mode>
44 static IsoSubspace* subspaceFor(VM& vm)
45 {
46 return vm.webAssemblyWrapperFunctionSpace<mode>();
47 }
48
49 DECLARE_INFO;
50
51 static WebAssemblyWrapperFunction* create(VM&, JSGlobalObject*, Structure*, JSObject*, unsigned importIndex, JSWebAssemblyInstance*, Wasm::SignatureIndex);
52 static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
53
54 Wasm::SignatureIndex signatureIndex() const { return m_importableFunction.signatureIndex; }
55 WasmToWasmImportableFunction::LoadLocation entrypointLoadLocation() const { return m_importableFunction.entrypointLoadLocation; }
56 WasmToWasmImportableFunction importableFunction() const { return m_importableFunction; }
57 JSObject* function() { return m_function.get(); }
58
59protected:
60 static void visitChildren(JSCell*, SlotVisitor&);
61
62 void finishCreation(VM&, NativeExecutable*, unsigned length, const String& name, JSObject*, JSWebAssemblyInstance*);
63
64private:
65 WebAssemblyWrapperFunction(VM&, JSGlobalObject*, Structure*, WasmToWasmImportableFunction);
66
67 WriteBarrier<JSObject> m_function;
68 // It's safe to just hold the raw WasmToWasmImportableFunction because we have a reference
69 // to our Instance, which points to the CodeBlock, which points to the Module
70 // that exported us, which ensures that the actual Signature/code doesn't get deallocated.
71 WasmToWasmImportableFunction m_importableFunction;
72};
73
74} // namespace JSC
75
76#endif // ENABLE(WEBASSEMBLY)
77