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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 "CallLinkInfo.h"
#include "DeferredWorkTimer.h"
#include "JSCast.h"
#include "Structure.h"
#include "WasmCallee.h"
#include "WasmFormat.h"
#include "WasmModule.h"
#include <wtf/Bag.h>
#include <wtf/Ref.h>
#include <wtf/Vector.h>
namespace JSC {
class JSWebAssemblyMemory;
namespace Wasm {
class Plan;
}
class JSWebAssemblyCodeBlock final : public JSCell {
public:
typedef JSCell Base;
static constexpr unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
static JSWebAssemblyCodeBlock* create(VM&, Ref<Wasm::CodeBlock>, const Wasm::ModuleInformation&);
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
template<typename CellType, SubspaceAccess mode>
static IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyCodeBlockSpace<mode>();
}
Wasm::CodeBlock& codeBlock() { return m_codeBlock.get(); }
MacroAssemblerCodePtr<WasmEntryPtrTag> wasmToEmbedderStub(size_t importFunctionNum) { return m_wasmToJSExitStubs[importFunctionNum].code(); }
void finishCreation(VM&);
void clearJSCallICs(VM&);
bool runnable() const { return !m_errorMessage; }
String errorMessage()
{
ASSERT(!runnable());
return m_errorMessage;
}
void finalizeUnconditionally(VM&);
private:
JSWebAssemblyCodeBlock(VM&, Ref<Wasm::CodeBlock>&&, const Wasm::ModuleInformation&);
DECLARE_EXPORT_INFO;
static constexpr bool needsDestruction = true;
static void destroy(JSCell*);
DECLARE_VISIT_CHILDREN;
Ref<Wasm::CodeBlock> m_codeBlock;
Vector<MacroAssemblerCodeRef<WasmEntryPtrTag>> m_wasmToJSExitStubs;
Bag<CallLinkInfo> m_callLinkInfos;
String m_errorMessage;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)