1//===-- MachVMRegion.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// Created by Greg Clayton on 6/26/07.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_MACHVMREGION_H
14#define LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_MACHVMREGION_H
15
16#include "DNBDefs.h"
17#include "DNBError.h"
18#include <mach/mach.h>
19
20class MachVMRegion {
21public:
22 MachVMRegion(task_t task);
23 ~MachVMRegion();
24
25 void Clear();
26 mach_vm_address_t StartAddress() const { return m_start; }
27 mach_vm_address_t EndAddress() const { return m_start + m_size; }
28 mach_vm_size_t GetByteSize() const { return m_size; }
29 mach_vm_address_t BytesRemaining(mach_vm_address_t addr) const {
30 if (ContainsAddress(addr))
31 return m_size - (addr - m_start);
32 else
33 return 0;
34 }
35 bool ContainsAddress(mach_vm_address_t addr) const {
36 return addr >= StartAddress() && addr < EndAddress();
37 }
38
39 bool SetProtections(mach_vm_address_t addr, mach_vm_size_t size,
40 vm_prot_t prot);
41 bool RestoreProtections();
42 bool GetRegionForAddress(nub_addr_t addr);
43 std::vector<std::string> GetMemoryTypes() const;
44
45 uint32_t GetDNBPermissions() const;
46
47 const DNBError &GetError() { return m_err; }
48
49protected:
50#if defined(VM_REGION_SUBMAP_SHORT_INFO_COUNT_64)
51 typedef vm_region_submap_short_info_data_64_t RegionInfo;
52 enum { kRegionInfoSize = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64 };
53#else
54 typedef vm_region_submap_info_data_64_t RegionInfo;
55 enum { kRegionInfoSize = VM_REGION_SUBMAP_INFO_COUNT_64 };
56#endif
57
58 task_t m_task;
59 mach_vm_address_t m_addr;
60 DNBError m_err;
61 mach_vm_address_t m_start;
62 mach_vm_size_t m_size;
63 natural_t m_depth;
64 RegionInfo m_data;
65 vm_prot_t m_curr_protection; // The current, possibly modified protections.
66 // Original value is saved in m_data.protections.
67 mach_vm_address_t
68 m_protection_addr; // The start address at which protections were changed
69 mach_vm_size_t
70 m_protection_size; // The size of memory that had its protections changed
71};
72
73#endif // LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_MACHVMREGION_H
74

source code of lldb/tools/debugserver/source/MacOSX/MachVMRegion.h