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/*
* Copyright (C) 2016-2024 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/ArityCheckMode.h>
#include <JavaScriptCore/MacroAssemblerCodeRef.h>
#include <JavaScriptCore/WasmCallee.h>
#include <JavaScriptCore/WebAssemblyFunctionBase.h>
#include <wtf/Noncopyable.h>
namespace JSC {
class JSGlobalObject;
struct ProtoCallFrame;
class WebAssemblyInstance;
class WebAssemblyFunction final : public WebAssemblyFunctionBase {
friend JSC::LLIntOffsetsExtractor;
public:
using Base = WebAssemblyFunctionBase;
static constexpr unsigned StructureFlags = Base::StructureFlags;
static constexpr DestructionMode needsDestruction = NeedsDestruction;
static void destroy(JSCell*);
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyFunctionSpace<mode>();
}
DECLARE_EXPORT_INFO;
DECLARE_VISIT_CHILDREN;
JS_EXPORT_PRIVATE static WebAssemblyFunction* create(VM&, JSGlobalObject*, Structure*, unsigned, const String&, JSWebAssemblyInstance*, Wasm::JSToWasmCallee&, Wasm::IPIntCallee&, WasmToWasmImportableFunction::LoadLocation, Wasm::TypeIndex, Ref<const Wasm::RTT>&&);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
Wasm::JSToWasmCallee* jsToWasmCallee() const { return m_boxedJSToWasmCallee.ptr(); }
CodePtr<WasmEntryPtrTag> jsToWasm(ArityCheckMode arity)
{
ASSERT_UNUSED(arity, arity == ArityCheckMode::ArityCheckNotRequired || arity == ArityCheckMode::MustCheckArity);
return m_boxedJSToWasmCallee->entrypoint();
}
CodePtr<JSEntryPtrTag> jsCallICEntrypoint()
{
#if ENABLE(JIT)
if (m_taintedness >= SourceTaintedOrigin::IndirectlyTainted)
return nullptr;
// Prep the entrypoint for the slow path.
executable()->entrypointFor(CodeSpecializationKind::CodeForCall, ArityCheckMode::MustCheckArity);
if (!m_jsToWasmICJITCode)
m_jsToWasmICJITCode = signature().jsToWasmICEntrypoint();
return m_jsToWasmICJITCode;
#else
return nullptr;
#endif
}
SourceTaintedOrigin taintedness() const { return m_taintedness; }
static constexpr ptrdiff_t offsetOfBoxedJSToWasmCallee() { return OBJECT_OFFSETOF(WebAssemblyFunction, m_boxedJSToWasmCallee); }
static constexpr ptrdiff_t offsetOfFrameSize() { return OBJECT_OFFSETOF(WebAssemblyFunction, m_frameSize); }
private:
WebAssemblyFunction(VM&, NativeExecutable*, JSGlobalObject*, Structure*, JSWebAssemblyInstance*, Wasm::JSToWasmCallee&, Wasm::IPIntCallee&, WasmToWasmImportableFunction::LoadLocation entrypointLoadLocation, Wasm::TypeIndex, Ref<const Wasm::RTT>&&);
CodePtr<JSEntryPtrTag> jsCallEntrypointSlow();
// This let's the JS->Wasm interpreter find its metadata
Ref<Wasm::JSToWasmCallee, BoxedNativeCalleePtrTraits<Wasm::JSToWasmCallee>> m_boxedJSToWasmCallee;
uint32_t m_frameSize;
SourceTaintedOrigin m_taintedness;
#if ENABLE(JIT)
CodePtr<JSEntryPtrTag> m_jsToWasmICJITCode;
#endif
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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