| 1 | //===-- mem_map.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_H_ |
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| 10 | #define SCUDO_MEM_MAP_H_ |
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| 11 | |
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| 12 | #include "mem_map_base.h" |
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| 13 | |
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| 14 | #include "common.h" |
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| 15 | #include "internal_defs.h" |
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| 16 | |
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| 17 | // TODO: This is only used for `MapPlatformData`. Remove these includes when we |
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| 18 | // have all three platform specific `MemMap` and `ReservedMemory` |
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| 19 | // implementations. |
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| 20 | #include "fuchsia.h" |
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| 21 | #include "linux.h" |
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| 22 | #include "trusty.h" |
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| 23 | |
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| 24 | #include "mem_map_fuchsia.h" |
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| 25 | #include "mem_map_linux.h" |
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| 26 | |
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| 27 | namespace scudo { |
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| 28 | |
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| 29 | // This will be deprecated when every allocator has been supported by each |
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| 30 | // platform's `MemMap` implementation. |
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| 31 | class MemMapDefault final : public MemMapBase<MemMapDefault> { |
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| 32 | public: |
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| 33 | constexpr MemMapDefault() = default; |
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| 34 | MemMapDefault(uptr Base, uptr Capacity) : Base(Base), Capacity(Capacity) {} |
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| 35 | |
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| 36 | // Impls for base functions. |
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| 37 | bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
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| 38 | void unmapImpl(uptr Addr, uptr Size); |
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| 39 | bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
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| 40 | void setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags); |
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| 41 | void releasePagesToOSImpl(uptr From, uptr Size) { |
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| 42 | return releaseAndZeroPagesToOSImpl(From, Size); |
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| 43 | } |
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| 44 | void releaseAndZeroPagesToOSImpl(uptr From, uptr Size); |
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| 45 | uptr getBaseImpl() { return Base; } |
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| 46 | uptr getCapacityImpl() { return Capacity; } |
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| 47 | |
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| 48 | void setMapPlatformData(MapPlatformData &NewData) { Data = NewData; } |
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| 49 | |
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| 50 | private: |
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| 51 | uptr Base = 0; |
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| 52 | uptr Capacity = 0; |
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| 53 | uptr MappedBase = 0; |
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| 54 | MapPlatformData Data = {}; |
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| 55 | }; |
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| 56 | |
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| 57 | // This will be deprecated when every allocator has been supported by each |
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| 58 | // platform's `MemMap` implementation. |
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| 59 | class ReservedMemoryDefault final |
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| 60 | : public ReservedMemory<ReservedMemoryDefault, MemMapDefault> { |
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| 61 | public: |
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| 62 | constexpr ReservedMemoryDefault() = default; |
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| 63 | |
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| 64 | bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
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| 65 | void releaseImpl(); |
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| 66 | MemMapT dispatchImpl(uptr Addr, uptr Size); |
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| 67 | uptr getBaseImpl() { return Base; } |
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| 68 | uptr getCapacityImpl() { return Capacity; } |
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| 69 | |
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| 70 | private: |
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| 71 | uptr Base = 0; |
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| 72 | uptr Capacity = 0; |
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| 73 | MapPlatformData Data = {}; |
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| 74 | }; |
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| 75 | |
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| 76 | #if SCUDO_LINUX |
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| 77 | using ReservedMemoryT = ReservedMemoryLinux; |
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| 78 | using MemMapT = ReservedMemoryT::MemMapT; |
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| 79 | #elif SCUDO_FUCHSIA |
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| 80 | using ReservedMemoryT = ReservedMemoryFuchsia; |
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| 81 | using MemMapT = ReservedMemoryT::MemMapT; |
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| 82 | #elif SCUDO_TRUSTY |
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| 83 | using ReservedMemoryT = ReservedMemoryDefault; |
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| 84 | using MemMapT = ReservedMemoryT::MemMapT; |
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| 85 | #else |
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| 86 | #error \ |
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| 87 | "Unsupported platform, please implement the ReservedMemory for your platform!" |
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| 88 | #endif |
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| 89 | |
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| 90 | } // namespace scudo |
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| 91 | |
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| 92 | #endif // SCUDO_MEM_MAP_H_ |
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| 93 | |
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