| //===-- mem_map.cpp ---------------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "mem_map.h" |
| |
| #include "common.h" |
| |
| namespace scudo { |
| |
| bool MemMapDefault::mapImpl(uptr Addr, uptr Size, const char *Name, |
| uptr Flags) { |
| void *MappedAddr = |
| ::scudo::map(reinterpret_cast<void *>(Addr), Size, Name, Flags, &Data); |
| if (MappedAddr == nullptr) |
| return false; |
| Base = reinterpret_cast<uptr>(MappedAddr); |
| Capacity = Size; |
| return true; |
| } |
| |
| void MemMapDefault::unmapImpl(uptr Addr, uptr Size) { |
| if (Size == Capacity) { |
| Base = Capacity = 0; |
| } else { |
| if (Base == Addr) |
| Base = Addr + Size; |
| Capacity -= Size; |
| } |
| |
| ::scudo::unmap(reinterpret_cast<void *>(Addr), Size, UNMAP_ALL, &Data); |
| } |
| |
| bool MemMapDefault::remapImpl(uptr Addr, uptr Size, const char *Name, |
| uptr Flags) { |
| void *RemappedAddr = |
| ::scudo::map(reinterpret_cast<void *>(Addr), Size, Name, Flags, &Data); |
| return reinterpret_cast<uptr>(RemappedAddr) == Addr; |
| } |
| |
| void MemMapDefault::releaseAndZeroPagesToOSImpl(uptr From, uptr Size) { |
| return ::scudo::releasePagesToOS(Base, From - Base, Size, &Data); |
| } |
| |
| void MemMapDefault::setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags) { |
| return ::scudo::setMemoryPermission(Addr, Size, Flags); |
| } |
| |
| void ReservedMemoryDefault::releaseImpl() { |
| ::scudo::unmap(reinterpret_cast<void *>(Base), Capacity, UNMAP_ALL, &Data); |
| } |
| |
| bool ReservedMemoryDefault::createImpl(uptr Addr, uptr Size, const char *Name, |
| uptr Flags) { |
| void *Reserved = ::scudo::map(reinterpret_cast<void *>(Addr), Size, Name, |
| Flags | MAP_NOACCESS, &Data); |
| if (Reserved == nullptr) |
| return false; |
| |
| Base = reinterpret_cast<uptr>(Reserved); |
| Capacity = Size; |
| |
| return true; |
| } |
| |
| ReservedMemoryDefault::MemMapT ReservedMemoryDefault::dispatchImpl(uptr Addr, |
| uptr Size) { |
| ReservedMemoryDefault::MemMapT NewMap(Addr, Size); |
| NewMap.setMapPlatformData(Data); |
| return NewMap; |
| } |
| |
| } // namespace scudo |