65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/*
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* Copyright (C) 2019-2023 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#include "shared/source/os_interface/linux/os_memory_linux.h"
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#include "shared/source/os_interface/linux/os_inc.h"
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#include "shared/source/os_interface/linux/sys_calls.h"
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#include <cinttypes>
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#include <fstream>
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#include <string>
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namespace NEO {
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std::unique_ptr<OSMemory> OSMemory::create() {
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return std::make_unique<OSMemoryLinux>();
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}
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void *OSMemoryLinux::osReserveCpuAddressRange(void *baseAddress, size_t sizeToReserve, bool topDownHint) {
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return mmapWrapper(baseAddress, sizeToReserve, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
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}
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void OSMemoryLinux::osReleaseCpuAddressRange(void *reservedCpuAddressRange, size_t reservedSize) {
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munmapWrapper(reservedCpuAddressRange, reservedSize);
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}
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void *OSMemoryLinux::mmapWrapper(void *addr, size_t size, int prot, int flags, int fd, off_t off) {
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return SysCalls::mmap(addr, size, prot, flags, fd, off);
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}
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int OSMemoryLinux::munmapWrapper(void *addr, size_t size) {
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return SysCalls::munmap(addr, size);
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}
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void OSMemoryLinux::getMemoryMaps(MemoryMaps &memoryMaps) {
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/*
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============ ===============================================================
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The /proc/PID/maps file contains the currently mapped memory regions and
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their access permissions.
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The format is::
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address perms offset dev inode pathname
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08048000-08049000 r-xp 00000000 03:00 8312 /opt/test
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*/
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std::ifstream ifs(std::string(Os::sysFsProcPathPrefix) + "/self/maps");
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std::string line;
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while (std::getline(ifs, line)) {
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uint64_t start = 0, end = 0;
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sscanf(line.c_str(), "%" SCNx64 "-%" SCNx64, &start, &end);
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memoryMaps.push_back({start, end});
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}
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}
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} // namespace NEO
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