mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
77 lines
2.9 KiB
C++
77 lines
2.9 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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#include "config.h"
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#include "WasmMemoryInformation.h"
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#if ENABLE(WEBASSEMBLY)
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#include "WasmContextInlines.h"
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#include <wtf/NeverDestroyed.h>
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namespace JSC { namespace Wasm {
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const PinnedRegisterInfo& PinnedRegisterInfo::get()
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{
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static LazyNeverDestroyed<PinnedRegisterInfo> staticPinnedRegisterInfo;
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static std::once_flag staticPinnedRegisterInfoFlag;
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std::call_once(staticPinnedRegisterInfoFlag, [] () {
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unsigned numberOfPinnedRegisters = 2;
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if (!Context::useFastTLS())
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++numberOfPinnedRegisters;
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GPRReg baseMemoryPointer = GPRInfo::regCS3;
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GPRReg boundsCheckingSizeRegister = GPRInfo::regCS4;
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GPRReg wasmContextInstancePointer = InvalidGPRReg;
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if (!Context::useFastTLS())
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wasmContextInstancePointer = GPRInfo::regCS0;
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staticPinnedRegisterInfo.construct(boundsCheckingSizeRegister, baseMemoryPointer, wasmContextInstancePointer);
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});
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return staticPinnedRegisterInfo.get();
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}
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PinnedRegisterInfo::PinnedRegisterInfo(GPRReg boundsCheckingSizeRegister, GPRReg baseMemoryPointer, GPRReg wasmContextInstancePointer)
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: boundsCheckingSizeRegister(boundsCheckingSizeRegister)
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, baseMemoryPointer(baseMemoryPointer)
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, wasmContextInstancePointer(wasmContextInstancePointer)
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{
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}
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MemoryInformation::MemoryInformation(PageCount initial, PageCount maximum, bool isShared, bool isImport)
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: m_initial(initial)
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, m_maximum(maximum)
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, m_isShared(isShared)
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, m_isImport(isImport)
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{
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RELEASE_ASSERT(!!m_initial);
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RELEASE_ASSERT(!m_maximum || m_maximum >= m_initial);
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ASSERT(!!*this);
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}
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} } // namespace JSC::Wasm
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#endif // ENABLE(WEBASSEMBLY)
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