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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 "JSDestructibleObject.h"
#include "JSObject.h"
#include "JSWebAssemblyCallee.h"
#include "UnconditionalFinalizer.h"
#include "WasmFormat.h"
#include <wtf/Bag.h>
#include <wtf/Vector.h>
namespace JSC {
class SymbolTable;
class JSWebAssemblyModule : public JSDestructibleObject {
public:
typedef JSDestructibleObject Base;
static JSWebAssemblyModule* create(VM&, Structure*, std::unique_ptr<Wasm::ModuleInformation>&&, Bag<CallLinkInfo>&&, Vector<Wasm::WasmExitStubs>&&, SymbolTable*, unsigned);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_INFO;
const Wasm::ModuleInformation& moduleInformation() const { return *m_moduleInformation.get(); }
SymbolTable* exportSymbolTable() const { return m_exportSymbolTable.get(); }
Wasm::SignatureIndex signatureIndexFromFunctionIndexSpace(unsigned functionIndexSpace) const
{
return m_moduleInformation->signatureIndexFromFunctionIndexSpace(functionIndexSpace);
}
unsigned functionImportCount() const { return m_wasmExitStubs.size(); }
JSWebAssemblyCallee* jsEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
RELEASE_ASSERT(calleeIndex < m_calleeCount);
return callees()[calleeIndex].get();
}
JSWebAssemblyCallee* wasmEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
RELEASE_ASSERT(calleeIndex < m_calleeCount);
return callees()[calleeIndex + m_calleeCount].get();
}
void setJSEntrypointCallee(VM& vm, unsigned calleeIndex, JSWebAssemblyCallee* callee)
{
RELEASE_ASSERT(calleeIndex < m_calleeCount);
callees()[calleeIndex].set(vm, this, callee);
}
void setWasmEntrypointCallee(VM& vm, unsigned calleeIndex, JSWebAssemblyCallee* callee)
{
RELEASE_ASSERT(calleeIndex < m_calleeCount);
callees()[calleeIndex + m_calleeCount].set(vm, this, callee);
}
WriteBarrier<JSWebAssemblyCallee>* callees()
{
return bitwise_cast<WriteBarrier<JSWebAssemblyCallee>*>(bitwise_cast<char*>(this) + offsetOfCallees());
}
protected:
JSWebAssemblyModule(VM&, Structure*, std::unique_ptr<Wasm::ModuleInformation>&&, Bag<CallLinkInfo>&&, Vector<Wasm::WasmExitStubs>&&, unsigned calleeCount);
void finishCreation(VM&, SymbolTable*);
static void destroy(JSCell*);
static void visitChildren(JSCell*, SlotVisitor&);
private:
static size_t offsetOfCallees()
{
return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<JSWebAssemblyCallee>)>(sizeof(JSWebAssemblyModule));
}
static size_t allocationSize(unsigned numCallees)
{
return offsetOfCallees() + sizeof(WriteBarrier<JSWebAssemblyCallee>) * numCallees * 2;
}
class UnconditionalFinalizer : public JSC::UnconditionalFinalizer {
void finalizeUnconditionally() override;
};
UnconditionalFinalizer m_unconditionalFinalizer;
std::unique_ptr<Wasm::ModuleInformation> m_moduleInformation;
Bag<CallLinkInfo> m_callLinkInfos;
WriteBarrier<SymbolTable> m_exportSymbolTable;
Vector<Wasm::WasmExitStubs> m_wasmExitStubs;
unsigned m_calleeCount;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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