| 1 | //===-- mem_map_linux.h -----------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef SCUDO_MEM_MAP_LINUX_H_ |
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| 10 | #define SCUDO_MEM_MAP_LINUX_H_ |
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| 11 | |
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| 12 | #include "platform.h" |
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| 13 | |
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| 14 | #if SCUDO_LINUX |
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| 15 | |
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| 16 | #include "common.h" |
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| 17 | #include "mem_map_base.h" |
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| 18 | |
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| 19 | namespace scudo { |
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| 20 | |
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| 21 | class MemMapLinux final : public MemMapBase<MemMapLinux> { |
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| 22 | public: |
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| 23 | constexpr MemMapLinux() = default; |
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| 24 | MemMapLinux(uptr Base, uptr Capacity) |
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| 25 | : MapBase(Base), MapCapacity(Capacity) {} |
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| 26 | |
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| 27 | // Impls for base functions. |
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| 28 | bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0); |
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| 29 | void unmapImpl(uptr Addr, uptr Size); |
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| 30 | bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0); |
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| 31 | void setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags); |
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| 32 | void releasePagesToOSImpl(uptr From, uptr Size) { |
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| 33 | return releaseAndZeroPagesToOSImpl(From, Size); |
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| 34 | } |
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| 35 | void releaseAndZeroPagesToOSImpl(uptr From, uptr Size); |
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| 36 | uptr getBaseImpl() { return MapBase; } |
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| 37 | uptr getCapacityImpl() { return MapCapacity; } |
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| 38 | |
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| 39 | private: |
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| 40 | uptr MapBase = 0; |
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| 41 | uptr MapCapacity = 0; |
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| 42 | }; |
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| 43 | |
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| 44 | // This will be deprecated when every allocator has been supported by each |
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| 45 | // platform's `MemMap` implementation. |
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| 46 | class ReservedMemoryLinux final |
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| 47 | : public ReservedMemory<ReservedMemoryLinux, MemMapLinux> { |
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| 48 | public: |
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| 49 | // The following two are the Impls for function in `MemMapBase`. |
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| 50 | uptr getBaseImpl() { return MapBase; } |
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| 51 | uptr getCapacityImpl() { return MapCapacity; } |
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| 52 | |
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| 53 | // These threes are specific to `ReservedMemory`. |
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| 54 | bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
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| 55 | void releaseImpl(); |
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| 56 | MemMapT dispatchImpl(uptr Addr, uptr Size); |
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| 57 | |
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| 58 | private: |
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| 59 | uptr MapBase = 0; |
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| 60 | uptr MapCapacity = 0; |
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| 61 | }; |
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| 62 | |
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| 63 | } // namespace scudo |
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| 64 | |
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| 65 | #endif // SCUDO_LINUX |
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| 66 | |
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| 67 | #endif // SCUDO_MEM_MAP_LINUX_H_ |
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| 68 | |
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