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/*
* Copyright (C) 2016-2017 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 "JSWebAssemblyCodeBlock.h"
#include "JSWebAssemblyMemory.h"
#include "JSWebAssemblyTable.h"
namespace JSC {
class JSModuleNamespaceObject;
class JSWebAssemblyModule;
class WebAssemblyToJSCallee;
class JSWebAssemblyInstance : public JSDestructibleObject {
public:
typedef JSDestructibleObject Base;
static JSWebAssemblyInstance* create(VM&, ExecState*, JSWebAssemblyModule*, JSObject* importObject, Structure*);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
JSWebAssemblyCodeBlock* codeBlock() const { return m_codeBlock.get(); }
void finalizeCreation(VM&, ExecState*, Ref<Wasm::CodeBlock>&&);
JSWebAssemblyModule* module() const { return m_module.get(); }
JSObject* importFunction(unsigned idx) { RELEASE_ASSERT(idx < m_numImportFunctions); return importFunctions()[idx].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); }
Wasm::MemoryMode memoryMode() { return memory()->memory().mode(); }
JSWebAssemblyTable* table() { return m_table.get(); }
int32_t loadI32Global(unsigned i) const { return m_globals.get()[i]; }
int64_t loadI64Global(unsigned i) const { return m_globals.get()[i]; }
float loadF32Global(unsigned i) const { return bitwise_cast<float>(loadI32Global(i)); }
double loadF64Global(unsigned i) const { return bitwise_cast<double>(loadI64Global(i)); }
void setGlobal(unsigned i, int64_t bits) { m_globals.get()[i] = bits; }
static ptrdiff_t offsetOfMemory() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_memory); }
static ptrdiff_t offsetOfTable() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_table); }
static ptrdiff_t offsetOfCallee() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_callee); }
static ptrdiff_t offsetOfGlobals() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_globals); }
static ptrdiff_t offsetOfVM() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_vm); }
static ptrdiff_t offsetOfCodeBlock() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_codeBlock); }
static ptrdiff_t offsetOfCachedStackLimit() { return OBJECT_OFFSETOF(JSWebAssemblyInstance, m_cachedStackLimit); }
static size_t offsetOfImportFunctions() { return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<JSCell>)>(sizeof(JSWebAssemblyInstance)); }
static size_t offsetOfImportFunction(size_t importFunctionNum) { return offsetOfImportFunctions() + importFunctionNum * sizeof(sizeof(WriteBarrier<JSCell>)); }
WebAssemblyToJSCallee* webAssemblyToJSCallee() { return m_callee.get(); }
void* cachedStackLimit() const { return m_cachedStackLimit; }
void setCachedStackLimit(void* limit) { m_cachedStackLimit = limit; }
protected:
JSWebAssemblyInstance(VM&, Structure*, unsigned numImportFunctions);
void finishCreation(VM&, JSWebAssemblyModule*, JSModuleNamespaceObject*);
static void destroy(JSCell*);
static void visitChildren(JSCell*, SlotVisitor&);
static size_t allocationSize(Checked<size_t> numImportFunctions)
{
return (offsetOfImportFunctions() + sizeof(WriteBarrier<JSCell>) * numImportFunctions).unsafeGet();
}
private:
VM* m_vm;
WriteBarrier<JSObject>* importFunctions() { return bitwise_cast<WriteBarrier<JSObject>*>(bitwise_cast<char*>(this) + offsetOfImportFunctions()); }
size_t globalMemoryByteSize() const;
WriteBarrier<JSWebAssemblyModule> m_module;
WriteBarrier<JSWebAssemblyCodeBlock> m_codeBlock;
WriteBarrier<JSModuleNamespaceObject> m_moduleNamespaceObject;
WriteBarrier<JSWebAssemblyMemory> m_memory;
WriteBarrier<JSWebAssemblyTable> m_table;
WriteBarrier<WebAssemblyToJSCallee> m_callee;
MallocPtr<uint64_t> m_globals;
void* m_cachedStackLimit { bitwise_cast<void*>(std::numeric_limits<uintptr_t>::max()) };
unsigned m_numImportFunctions;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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