| 1 | //===-- mem_map_fuchsia.h ---------------------------------------*- C++ -*-===// |
|---|
| 2 | // |
|---|
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | |
|---|
| 9 | #ifndef SCUDO_MEM_MAP_FUCHSIA_H_ |
|---|
| 10 | #define SCUDO_MEM_MAP_FUCHSIA_H_ |
|---|
| 11 | |
|---|
| 12 | #include "mem_map_base.h" |
|---|
| 13 | |
|---|
| 14 | #if SCUDO_FUCHSIA |
|---|
| 15 | |
|---|
| 16 | #include <stdint.h> |
|---|
| 17 | #include <zircon/types.h> |
|---|
| 18 | |
|---|
| 19 | namespace scudo { |
|---|
| 20 | |
|---|
| 21 | class MemMapFuchsia final : public MemMapBase<MemMapFuchsia> { |
|---|
| 22 | public: |
|---|
| 23 | constexpr MemMapFuchsia() = default; |
|---|
| 24 | |
|---|
| 25 | // Impls for base functions. |
|---|
| 26 | bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
|---|
| 27 | void unmapImpl(uptr Addr, uptr Size); |
|---|
| 28 | bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
|---|
| 29 | void setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags); |
|---|
| 30 | void releasePagesToOSImpl(uptr From, uptr Size) { |
|---|
| 31 | return releaseAndZeroPagesToOSImpl(From, Size); |
|---|
| 32 | } |
|---|
| 33 | void releaseAndZeroPagesToOSImpl(uptr From, uptr Size); |
|---|
| 34 | uptr getBaseImpl() { return WindowBase; } |
|---|
| 35 | uptr getCapacityImpl() { return WindowSize; } |
|---|
| 36 | |
|---|
| 37 | private: |
|---|
| 38 | friend class ReservedMemoryFuchsia; |
|---|
| 39 | |
|---|
| 40 | // Used by ReservedMemoryFuchsia::dispatch. |
|---|
| 41 | MemMapFuchsia(uptr Base, uptr Capacity); |
|---|
| 42 | |
|---|
| 43 | // Virtual memory address corresponding to VMO offset 0. |
|---|
| 44 | uptr MapAddr = 0; |
|---|
| 45 | |
|---|
| 46 | // Virtual memory base address and size of the VMO subrange that is still in |
|---|
| 47 | // use. unmapImpl() can shrink this range, either at the beginning or at the |
|---|
| 48 | // end. |
|---|
| 49 | uptr WindowBase = 0; |
|---|
| 50 | uptr WindowSize = 0; |
|---|
| 51 | |
|---|
| 52 | zx_handle_t Vmo = ZX_HANDLE_INVALID; |
|---|
| 53 | }; |
|---|
| 54 | |
|---|
| 55 | class ReservedMemoryFuchsia final |
|---|
| 56 | : public ReservedMemory<ReservedMemoryFuchsia, MemMapFuchsia> { |
|---|
| 57 | public: |
|---|
| 58 | constexpr ReservedMemoryFuchsia() = default; |
|---|
| 59 | |
|---|
| 60 | bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags); |
|---|
| 61 | void releaseImpl(); |
|---|
| 62 | MemMapT dispatchImpl(uptr Addr, uptr Size); |
|---|
| 63 | uptr getBaseImpl() { return Base; } |
|---|
| 64 | uptr getCapacityImpl() { return Capacity; } |
|---|
| 65 | |
|---|
| 66 | private: |
|---|
| 67 | uptr Base = 0; |
|---|
| 68 | uptr Capacity = 0; |
|---|
| 69 | }; |
|---|
| 70 | |
|---|
| 71 | } // namespace scudo |
|---|
| 72 | |
|---|
| 73 | #endif // SCUDO_FUCHSIA |
|---|
| 74 | |
|---|
| 75 | #endif // SCUDO_MEM_MAP_FUCHSIA_H_ |
|---|
| 76 | |
|---|
