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/*
* Copyright (C) 2016-2023 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 "ArityCheckMode.h"
#include "MacroAssemblerCodeRef.h"
#include "WasmCallee.h"
#include "WebAssemblyFunctionBase.h"
#include <wtf/Noncopyable.h>
namespace JSC {
class JSGlobalObject;
struct ProtoCallFrame;
class WebAssemblyInstance;
class WebAssemblyFunction final : public WebAssemblyFunctionBase {
public:
using Base = WebAssemblyFunctionBase;
static constexpr unsigned StructureFlags = Base::StructureFlags;
static constexpr bool needsDestruction = true;
static void destroy(JSCell*);
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyFunctionSpace<mode>();
}
DECLARE_EXPORT_INFO;
JS_EXPORT_PRIVATE static WebAssemblyFunction* create(VM&, JSGlobalObject*, Structure*, unsigned, const String&, JSWebAssemblyInstance*, Wasm::Callee& jsEntrypoint, WasmToWasmImportableFunction::LoadLocation, Wasm::TypeIndex, RefPtr<const Wasm::RTT>);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
CodePtr<WasmEntryPtrTag> jsEntrypoint(ArityCheckMode arity)
{
ASSERT_UNUSED(arity, arity == ArityCheckNotRequired || arity == MustCheckArity);
return m_jsEntrypoint;
}
CodePtr<JSEntryPtrTag> jsCallEntrypoint()
{
if (m_jsToWasmICCallee)
return m_jsToWasmICCallee->entrypoint().retagged<JSEntryPtrTag>();
return jsCallEntrypointSlow();
}
private:
DECLARE_VISIT_CHILDREN;
WebAssemblyFunction(VM&, NativeExecutable*, JSGlobalObject*, Structure*, JSWebAssemblyInstance*, Wasm::Callee& jsEntrypoint, WasmToWasmImportableFunction::LoadLocation entrypointLoadLocation, Wasm::TypeIndex, RefPtr<const Wasm::RTT>);
CodePtr<JSEntryPtrTag> jsCallEntrypointSlow();
bool usesTagRegisters() const;
RegisterAtOffsetList usedCalleeSaveRegisters() const;
RegisterSet calleeSaves() const;
// It's safe to just hold the raw jsEntrypoint because we have a reference
// to our Instance, which points to the Module that exported us, which
// ensures that the actual Signature/code doesn't get deallocated.
CodePtr<WasmEntryPtrTag> m_jsEntrypoint;
RefPtr<Wasm::JSToWasmICCallee> m_jsToWasmICCallee;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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