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/*
* Copyright (C) 2022-2023 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 "JSObject.h"
#include "WasmTypeDefinitionInlines.h"
#include "WebAssemblyGCObjectBase.h"
#include <wtf/Ref.h>
namespace JSC {
class JSWebAssemblyInstance;
class JSWebAssemblyStruct final : public WebAssemblyGCObjectBase {
public:
using Base = WebAssemblyGCObjectBase;
static constexpr DestructionMode needsDestruction = NeedsDestruction;
static void destroy(JSCell*);
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyStructSpace<mode>();
}
DECLARE_EXPORT_INFO;
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
static JSWebAssemblyStruct* create(VM&, Structure*, JSWebAssemblyInstance*, uint32_t, RefPtr<const Wasm::RTT>&&);
DECLARE_VISIT_CHILDREN;
uint64_t get(uint32_t) const;
void set(uint32_t, uint64_t);
void set(uint32_t, v128_t);
const Wasm::StructType* structType() const { return m_type->as<Wasm::StructType>(); }
Wasm::FieldType fieldType(uint32_t fieldIndex) const { return structType()->field(fieldIndex); }
// Returns the offset for m_payload.m_storage
static constexpr ptrdiff_t offsetOfPayload() { return OBJECT_OFFSETOF(JSWebAssemblyStruct, m_payload) + FixedVector<uint8_t>::offsetOfStorage(); }
const uint8_t* fieldPointer(uint32_t fieldIndex) const;
uint8_t* fieldPointer(uint32_t fieldIndex);
protected:
JSWebAssemblyStruct(VM&, Structure*, Ref<const Wasm::TypeDefinition>&&, RefPtr<const Wasm::RTT>&&);
DECLARE_DEFAULT_FINISH_CREATION;
// FIXME: It is possible to encode the type information in the structure field of Wasm.Struct and remove this field.
// https://bugs.webkit.org/show_bug.cgi?id=244838
Ref<const Wasm::TypeDefinition> m_type;
FixedVector<uint8_t> m_payload;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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