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//===-- mem_map.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_H_
#define SCUDO_MEM_MAP_H_
#include "mem_map_base.h"
#include "common.h"
#include "internal_defs.h"
// TODO: This is only used for `MapPlatformData`. Remove these includes when we
// have all three platform specific `MemMap` and `ReservedMemory`
// implementations.
#include "fuchsia.h"
#include "linux.h"
#include "trusty.h"
namespace scudo {
// This will be deprecated when every allocator has been supported by each
// platform's `MemMap` implementation.
class MemMapDefault final : public MemMapBase<MemMapDefault> {
public:
constexpr MemMapDefault() = default;
MemMapDefault(uptr Base, uptr Capacity) : Base(Base), Capacity(Capacity) {}
// Impls for base functions.
bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
void unmapImpl(uptr Addr, uptr Size);
bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
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 Base; }
uptr getCapacityImpl() { return Capacity; }
void setMapPlatformData(MapPlatformData &NewData) { Data = NewData; }
private:
uptr Base = 0;
uptr Capacity = 0;
uptr MappedBase = 0;
MapPlatformData Data = {};
};
// This will be deprecated when every allocator has been supported by each
// platform's `MemMap` implementation.
class ReservedMemoryDefault final
: public ReservedMemory<ReservedMemoryDefault, MemMapDefault> {
public:
constexpr ReservedMemoryDefault() = default;
bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
void releaseImpl();
MemMapT dispatchImpl(uptr Addr, uptr Size);
uptr getBaseImpl() { return Base; }
uptr getCapacityImpl() { return Capacity; }
private:
uptr Base = 0;
uptr Capacity = 0;
MapPlatformData Data = {};
};
#if SCUDO_LINUX
using ReservedMemoryT = ReservedMemoryDefault;
using MemMapT = ReservedMemoryT::MemMapT;
#elif SCUDO_FUCHSIA
using ReservedMemoryT = ReservedMemoryDefault;
using MemMapT = ReservedMemoryT::MemMapT;
#elif SCUDO_TRUSTY
using ReservedMemoryT = ReservedMemoryDefault;
using MemMapT = ReservedMemoryT::MemMapT;
#else
#error \
"Unsupported platform, please implement the ReservedMemory for your platform!"
#endif
} // namespace scudo
#endif // SCUDO_MEM_MAP_H_
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