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/*
* Copyright (C) 2016 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 "JSFunction.h"
#include "JSWebAssemblyCallee.h"
#include <wtf/Noncopyable.h>
namespace JSC {
class JSGlobalObject;
struct ProtoCallFrame;
class WebAssemblyInstance;
namespace B3 {
class Compilation;
}
class WebAssemblyFunction : public JSFunction {
public:
typedef JSFunction Base;
const static unsigned StructureFlags = Base::StructureFlags;
DECLARE_EXPORT_INFO;
JS_EXPORT_PRIVATE static WebAssemblyFunction* create(VM&, JSGlobalObject*, unsigned, const String&, JSWebAssemblyInstance*, JSWebAssemblyCallee* jsEntrypoint, JSWebAssemblyCallee* wasmEntrypoint, Wasm::SignatureIndex);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
JSWebAssemblyInstance* instance() const { return m_instance.get(); }
Wasm::SignatureIndex signatureIndex() const { return m_signatureIndex; }
void* wasmEntrypoint() { return m_wasmEntryPointCode; }
void* jsEntrypoint() { return m_jsEntrypoint->entrypoint(); }
static ptrdiff_t offsetOfInstance() { return OBJECT_OFFSETOF(WebAssemblyFunction, m_instance); }
static ptrdiff_t offsetOfWasmEntryPointCode() { return OBJECT_OFFSETOF(WebAssemblyFunction, m_wasmEntryPointCode); }
protected:
static void visitChildren(JSCell*, SlotVisitor&);
void finishCreation(VM&, NativeExecutable*, unsigned length, const String& name, JSWebAssemblyInstance*, JSWebAssemblyCallee* jsEntrypoint, JSWebAssemblyCallee* wasmEntrypoint);
private:
WebAssemblyFunction(VM&, JSGlobalObject*, Structure*, JSWebAssemblyCallee*, Wasm::SignatureIndex);
WriteBarrier<JSWebAssemblyInstance> m_instance;
void* m_wasmEntryPointCode; // Cache code pointer: allows the wasm -> wasm stub to do a single load and jump instead of having dependent loads.
WriteBarrier<JSWebAssemblyCallee> m_jsEntrypoint;
WriteBarrier<JSWebAssemblyCallee> m_wasmEntrypoint;
Wasm::SignatureIndex m_signatureIndex;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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