109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/* XMRig
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* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
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* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
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* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
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* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
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* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
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* Copyright 2017-2018 XMR-Stak <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
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* Copyright 2018 Lee Clagett <https://github.com/vtnerd>
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* Copyright 2018-2019 SChernykh <https://github.com/SChernykh>
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* Copyright 2018-2019 tevador <tevador@gmail.com>
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* Copyright 2016-2019 XMRig <https://github.com/xmrig>, <support@xmrig.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <winsock2.h>
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#include <windows.h>
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#include "crypto/common/VirtualMemory.h"
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xmrig::VirtualMemory::VirtualMemory(size_t size, bool hugePages, size_t align) :
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m_size(VirtualMemory::align(size))
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{
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if (hugePages) {
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m_scratchpad = static_cast<uint8_t*>(allocateLargePagesMemory(m_size));
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if (m_scratchpad) {
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m_flags |= HUGEPAGES;
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return;
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}
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}
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m_scratchpad = static_cast<uint8_t*>(_mm_malloc(m_size, align));
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}
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xmrig::VirtualMemory::~VirtualMemory()
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{
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if (!m_scratchpad) {
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return;
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}
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if (isHugePages()) {
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freeLargePagesMemory(m_scratchpad, m_size);
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}
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else {
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_mm_free(m_scratchpad);
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}
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}
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void *xmrig::VirtualMemory::allocateExecutableMemory(size_t size)
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{
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return VirtualAlloc(nullptr, size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
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}
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void *xmrig::VirtualMemory::allocateLargePagesMemory(size_t size)
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{
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const size_t min = GetLargePageMinimum();
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void *mem = nullptr;
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if (min > 0) {
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mem = VirtualAlloc(nullptr, align(size, min), MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE);
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}
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return mem;
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}
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void xmrig::VirtualMemory::flushInstructionCache(void *p, size_t size)
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{
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::FlushInstructionCache(GetCurrentProcess(), p, size);
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}
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void xmrig::VirtualMemory::freeLargePagesMemory(void *p, size_t)
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{
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VirtualFree(p, 0, MEM_RELEASE);
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}
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void xmrig::VirtualMemory::protectExecutableMemory(void *p, size_t size)
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{
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DWORD oldProtect;
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VirtualProtect(p, size, PAGE_EXECUTE_READ, &oldProtect);
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}
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void xmrig::VirtualMemory::unprotectExecutableMemory(void *p, size_t size)
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{
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DWORD oldProtect;
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VirtualProtect(p, size, PAGE_EXECUTE_READWRITE, &oldProtect);
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}
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