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/*
* Copyright (C) 2016-2019 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 "JSWebAssemblyCodeBlock.h"
#include "JSWebAssemblyGlobal.h"
#include "JSWebAssemblyMemory.h"
#include "JSWebAssemblyTable.h"
#include "WasmCreationMode.h"
#include "WasmInstance.h"
#include <wtf/Ref.h>
namespace JSC {
class JSModuleNamespaceObject;
class JSWebAssemblyModule;
namespace Wasm {
class CodeBlock;
}
class JSWebAssemblyInstance final : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr bool needsDestruction = true;
static void destroy(JSCell*);
template<typename CellType, SubspaceAccess mode>
static IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyInstanceSpace<mode>();
}
static Identifier createPrivateModuleKey();
static JSWebAssemblyInstance* tryCreate(VM&, JSGlobalObject*, const Identifier& moduleKey, JSWebAssemblyModule*, JSObject* importObject, Structure*, Ref<Wasm::Module>&&, Wasm::CreationMode);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
void finalizeCreation(VM&, JSGlobalObject*, Ref<Wasm::CodeBlock>&&, JSObject* importObject, Wasm::CreationMode);
Wasm::Instance& instance() { return m_instance.get(); }
JSModuleNamespaceObject* moduleNamespaceObject() { return m_moduleNamespaceObject.get(); }
JSWebAssemblyMemory* memory() { return m_memory.get(); }
void setMemory(VM& vm, JSWebAssemblyMemory* value) {
ASSERT(!memory());
m_memory.set(vm, this, value);
instance().setMemory(makeRef(memory()->memory()));
}
Wasm::MemoryMode memoryMode() { return memory()->memory().mode(); }
JSWebAssemblyTable* table(unsigned i) { return m_tables[i].get(); }
void setTable(VM& vm, uint32_t index, JSWebAssemblyTable* value)
{
ASSERT(index < m_tables.size());
ASSERT(!table(index));
m_tables[index].set(vm, this, value);
instance().setTable(index, makeRef(*table(index)->table()));
}
void linkGlobal(VM& vm, uint32_t index, JSWebAssemblyGlobal* value)
{
ASSERT(value == value->global()->owner<JSWebAssemblyGlobal>());
instance().linkGlobal(index, makeRef(*value->global()));
vm.heap.writeBarrier(this, value);
}
JSGlobalObject* globalObject() const { return m_globalObject.get(); }
JSWebAssemblyModule* module() const { return m_module.get(); }
static size_t offsetOfInstance() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_instance); }
static size_t offsetOfModule() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_module); }
static size_t offsetOfGlobalObject() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_globalObject); }
static size_t offsetOfVM() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_vm); }
private:
JSWebAssemblyInstance(VM&, Structure*, Ref<Wasm::Instance>&&);
void finishCreation(VM&, JSWebAssemblyModule*, JSModuleNamespaceObject*);
static void visitChildren(JSCell*, SlotVisitor&);
Ref<Wasm::Instance> m_instance;
VM* m_vm;
WriteBarrier<JSGlobalObject> m_globalObject;
WriteBarrier<JSWebAssemblyModule> m_module;
WriteBarrier<JSWebAssemblyCodeBlock> m_codeBlock;
WriteBarrier<JSModuleNamespaceObject> m_moduleNamespaceObject;
WriteBarrier<JSWebAssemblyMemory> m_memory;
Vector<WriteBarrier<JSWebAssemblyTable>> m_tables;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)