mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/*
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* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(WEBASSEMBLY)
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#include "GPRInfo.h"
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#include "RegisterSet.h"
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#include "WasmMemory.h"
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#include "WasmPageCount.h"
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#include <wtf/Forward.h>
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#include <wtf/Ref.h>
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#include <wtf/Vector.h>
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namespace JSC { namespace Wasm {
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struct PinnedSizeRegisterInfo {
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GPRReg boundsCheckingSizeRegister;
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unsigned sizeOffset;
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};
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class PinnedRegisterInfo {
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public:
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PinnedRegisterInfo(GPRReg, GPRReg, GPRReg);
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static const PinnedRegisterInfo& get();
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RegisterSet toSave(MemoryMode mode) const
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{
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RegisterSet result;
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result.set(baseMemoryPointer);
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if (wasmContextInstancePointer != InvalidGPRReg)
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result.set(wasmContextInstancePointer);
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if (mode != MemoryMode::Signaling)
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result.set(boundsCheckingSizeRegister);
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return result;
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}
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GPRReg boundsCheckingSizeRegister;
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GPRReg baseMemoryPointer;
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GPRReg wasmContextInstancePointer;
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};
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class MemoryInformation {
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public:
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MemoryInformation()
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{
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ASSERT(!*this);
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}
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MemoryInformation(PageCount initial, PageCount maximum, bool isShared, bool isImport);
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PageCount initial() const { return m_initial; }
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PageCount maximum() const { return m_maximum; }
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bool isShared() const { return m_isShared; }
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bool isImport() const { return m_isImport; }
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explicit operator bool() const { return !!m_initial; }
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private:
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PageCount m_initial { };
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PageCount m_maximum { };
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bool m_isShared { false };
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bool m_isImport { false };
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};
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} } // namespace JSC::Wasm
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#endif // ENABLE(WEBASSEMBLY)
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