/* * 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 "GPRInfo.h" #include "RegisterSet.h" #include "WasmMemory.h" #include "WasmPageCount.h" #include <wtf/Forward.h> #include <wtf/Ref.h> #include <wtf/Vector.h> namespace JSC { namespace Wasm { struct PinnedSizeRegisterInfo { GPRReg sizeRegister; unsigned sizeOffset; }; class PinnedRegisterInfo { public: PinnedRegisterInfo(GPRReg, GPRReg, GPRReg); static const PinnedRegisterInfo& get(); RegisterSet toSave(MemoryMode mode) const { RegisterSet result; result.set(baseMemoryPointer); if (wasmContextInstancePointer != InvalidGPRReg) result.set(wasmContextInstancePointer); if (mode != MemoryMode::Signaling) result.set(sizeRegister); return result; } GPRReg sizeRegister; GPRReg baseMemoryPointer; GPRReg wasmContextInstancePointer; }; class MemoryInformation { public: MemoryInformation() { ASSERT(!*this); } MemoryInformation(PageCount initial, PageCount maximum, bool isImport); PageCount initial() const { return m_initial; } PageCount maximum() const { return m_maximum; } bool isImport() const { return m_isImport; } explicit operator bool() const { return !!m_initial; } private: PageCount m_initial { }; PageCount m_maximum { }; bool m_isImport { false }; }; } } // namespace JSC::Wasm #endif // ENABLE(WEBASSEMBLY)