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/*
* Copyright (C) 2017-2021 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
#if ENABLE(WEBASSEMBLY)
#include <JavaScriptCore/JSFunction.h>
#include <JavaScriptCore/WasmFormat.h>
namespace JSC {
class JSGlobalObject;
class JSWebAssemblyInstance;
using Wasm::WasmToWasmImportableFunction;
using Wasm::WasmOrJSImportableFunctionCallLinkInfo;
class WebAssemblyFunctionBase : public JSFunction {
friend JSC::LLIntOffsetsExtractor;
public:
using Base = JSFunction;
static constexpr unsigned StructureFlags = Base::StructureFlags;
DECLARE_INFO;
DECLARE_VISIT_CHILDREN;
JSWebAssemblyInstance* instance() const { return m_importableFunction.targetInstance.get(); }
Wasm::TypeIndex typeIndex() const { return m_importableFunction.typeIndex; }
Wasm::Type type() const { return { Wasm::TypeKind::Ref, typeIndex() }; }
WasmToWasmImportableFunction::LoadLocation entrypointLoadLocation() const { return m_importableFunction.entrypointLoadLocation; }
CalleeBits boxedCallee() const { return m_importableFunction.boxedCallee; }
const Wasm::WasmOrJSImportableFunction& importableFunction() const { return m_importableFunction; }
const Wasm::RTT* rtt() const { return m_importableFunction.rtt; }
const Wasm::FunctionSignature& signature() const;
WasmOrJSImportableFunctionCallLinkInfo* callLinkInfo() const { return m_callLinkInfo; }
static constexpr ptrdiff_t offsetOfImportableFunction() { return OBJECT_OFFSETOF(WebAssemblyFunctionBase, m_importableFunction); }
static constexpr ptrdiff_t offsetOfEntrypointLoadLocation() { return OBJECT_OFFSETOF(WebAssemblyFunctionBase, m_importableFunction) + WasmToWasmImportableFunction::offsetOfEntrypointLoadLocation(); }
static constexpr ptrdiff_t offsetOfBoxedCallee() { return OBJECT_OFFSETOF(WebAssemblyFunctionBase, m_importableFunction) + WasmToWasmImportableFunction::offsetOfBoxedCallee(); }
static constexpr ptrdiff_t offsetOfTargetInstance() { return OBJECT_OFFSETOF(WebAssemblyFunctionBase, m_importableFunction) + WasmToWasmImportableFunction::offsetOfTargetInstance(); }
static constexpr ptrdiff_t offsetOfRTT() { return OBJECT_OFFSETOF(WebAssemblyFunctionBase, m_importableFunction) + WasmToWasmImportableFunction::offsetOfRTT(); }
protected:
void finishCreation(VM&, NativeExecutable*, unsigned length, const String& name);
WebAssemblyFunctionBase(VM&, NativeExecutable*, JSGlobalObject*, Structure*, Wasm::WasmOrJSImportableFunction&&, Wasm::WasmOrJSImportableFunctionCallLinkInfo*);
Wasm::WasmOrJSImportableFunction m_importableFunction;
// It's safe to just hold the raw WasmToWasmImportableFunctionCallLinkInfo because we have a reference
// to our Instance, which points to the CodeBlock, which points to the Module
// that exported us, which ensures that the actual Signature/RTT/code doesn't get deallocated.
Wasm::WasmOrJSImportableFunctionCallLinkInfo* m_callLinkInfo;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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