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//===-- mem_map_linux.h -----------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef SCUDO_MEM_MAP_LINUX_H_
#define SCUDO_MEM_MAP_LINUX_H_
#include "platform.h"
#if SCUDO_LINUX
#include "common.h"
#include "mem_map_base.h"
namespace scudo {
class MemMapLinux final : public MemMapBase<MemMapLinux> {
public:
constexpr MemMapLinux() = default;
MemMapLinux(uptr Base, uptr Capacity)
: MapBase(Base), MapCapacity(Capacity) {}
// Impls for base functions.
bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0);
void unmapImpl(uptr Addr, uptr Size);
bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0);
void setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags);
void releasePagesToOSImpl(uptr From, uptr Size) {
return releaseAndZeroPagesToOSImpl(From, Size);
}
void releaseAndZeroPagesToOSImpl(uptr From, uptr Size);
uptr getBaseImpl() { return MapBase; }
uptr getCapacityImpl() { return MapCapacity; }
private:
uptr MapBase = 0;
uptr MapCapacity = 0;
};
// This will be deprecated when every allocator has been supported by each
// platform's `MemMap` implementation.
class ReservedMemoryLinux final
: public ReservedMemory<ReservedMemoryLinux, MemMapLinux> {
public:
// The following two are the Impls for function in `MemMapBase`.
uptr getBaseImpl() { return MapBase; }
uptr getCapacityImpl() { return MapCapacity; }
// These threes are specific to `ReservedMemory`.
bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
void releaseImpl();
MemMapT dispatchImpl(uptr Addr, uptr Size);
private:
uptr MapBase = 0;
uptr MapCapacity = 0;
};
} // namespace scudo
#endif // SCUDO_LINUX
#endif // SCUDO_MEM_MAP_LINUX_H_
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