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//===-- mem_map_fuchsia.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_FUCHSIA_H_
#define SCUDO_MEM_MAP_FUCHSIA_H_
#include "mem_map_base.h"
#if SCUDO_FUCHSIA
#include <stdint.h>
#include <zircon/types.h>
namespace scudo {
class MemMapFuchsia final : public MemMapBase<MemMapFuchsia> {
public:
constexpr MemMapFuchsia() = default;
// 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 WindowBase; }
uptr getCapacityImpl() { return WindowSize; }
private:
friend class ReservedMemoryFuchsia;
// Used by ReservedMemoryFuchsia::dispatch.
MemMapFuchsia(uptr Base, uptr Capacity);
// Virtual memory address corresponding to VMO offset 0.
uptr MapAddr = 0;
// Virtual memory base address and size of the VMO subrange that is still in
// use. unmapImpl() can shrink this range, either at the beginning or at the
// end.
uptr WindowBase = 0;
uptr WindowSize = 0;
zx_handle_t Vmo = ZX_HANDLE_INVALID;
};
class ReservedMemoryFuchsia final
: public ReservedMemory<ReservedMemoryFuchsia, MemMapFuchsia> {
public:
constexpr ReservedMemoryFuchsia() = 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;
};
} // namespace scudo
#endif // SCUDO_FUCHSIA
#endif // SCUDO_MEM_MAP_FUCHSIA_H_
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