1 //===-- MemoryRegionInfo.h ---------------------------------------*- C++
2 //-*-===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLDB_TARGET_MEMORYREGIONINFO_H
11 #define LLDB_TARGET_MEMORYREGIONINFO_H
12 
13 #include <optional>
14 #include <vector>
15 
16 #include "lldb/Utility/ConstString.h"
17 #include "lldb/Utility/RangeMap.h"
18 #include "llvm/Support/FormatProviders.h"
19 
20 namespace lldb_private {
21 class MemoryRegionInfo {
22 public:
23   typedef Range<lldb::addr_t, lldb::addr_t> RangeType;
24 
25   enum OptionalBool { eDontKnow = -1, eNo = 0, eYes = 1 };
26 
27   MemoryRegionInfo() = default;
MemoryRegionInfo(RangeType range,OptionalBool read,OptionalBool write,OptionalBool execute,OptionalBool shared,OptionalBool mapped,ConstString name,OptionalBool flash,lldb::offset_t blocksize,OptionalBool memory_tagged,OptionalBool stack_memory)28   MemoryRegionInfo(RangeType range, OptionalBool read, OptionalBool write,
29                    OptionalBool execute, OptionalBool shared,
30                    OptionalBool mapped, ConstString name,
31                    OptionalBool flash, lldb::offset_t blocksize,
32                    OptionalBool memory_tagged, OptionalBool stack_memory)
33       : m_range(range), m_read(read), m_write(write), m_execute(execute),
34         m_shared(shared), m_mapped(mapped), m_name(name), m_flash(flash),
35         m_blocksize(blocksize), m_memory_tagged(memory_tagged),
36         m_is_stack_memory(stack_memory) {}
37 
GetRange()38   RangeType &GetRange() { return m_range; }
39 
Clear()40   void Clear() { *this = MemoryRegionInfo(); }
41 
GetRange()42   const RangeType &GetRange() const { return m_range; }
43 
GetReadable()44   OptionalBool GetReadable() const { return m_read; }
45 
GetWritable()46   OptionalBool GetWritable() const { return m_write; }
47 
GetExecutable()48   OptionalBool GetExecutable() const { return m_execute; }
49 
GetShared()50   OptionalBool GetShared() const { return m_shared; }
51 
GetMapped()52   OptionalBool GetMapped() const { return m_mapped; }
53 
GetName()54   ConstString GetName() const { return m_name; }
55 
GetMemoryTagged()56   OptionalBool GetMemoryTagged() const { return m_memory_tagged; }
57 
SetReadable(OptionalBool val)58   void SetReadable(OptionalBool val) { m_read = val; }
59 
SetWritable(OptionalBool val)60   void SetWritable(OptionalBool val) { m_write = val; }
61 
SetExecutable(OptionalBool val)62   void SetExecutable(OptionalBool val) { m_execute = val; }
63 
SetShared(OptionalBool val)64   void SetShared(OptionalBool val) { m_shared = val; }
65 
SetMapped(OptionalBool val)66   void SetMapped(OptionalBool val) { m_mapped = val; }
67 
SetName(const char * name)68   void SetName(const char *name) { m_name = ConstString(name); }
69 
GetFlash()70   OptionalBool GetFlash() const { return m_flash; }
71 
SetFlash(OptionalBool val)72   void SetFlash(OptionalBool val) { m_flash = val; }
73 
GetBlocksize()74   lldb::offset_t GetBlocksize() const { return m_blocksize; }
75 
SetBlocksize(lldb::offset_t blocksize)76   void SetBlocksize(lldb::offset_t blocksize) { m_blocksize = blocksize; }
77 
SetMemoryTagged(OptionalBool val)78   void SetMemoryTagged(OptionalBool val) { m_memory_tagged = val; }
79 
80   // Get permissions as a uint32_t that is a mask of one or more bits from the
81   // lldb::Permissions
GetLLDBPermissions()82   uint32_t GetLLDBPermissions() const {
83     uint32_t permissions = 0;
84     if (m_read == eYes)
85       permissions |= lldb::ePermissionsReadable;
86     if (m_write == eYes)
87       permissions |= lldb::ePermissionsWritable;
88     if (m_execute == eYes)
89       permissions |= lldb::ePermissionsExecutable;
90     return permissions;
91   }
92 
93   // Set permissions from a uint32_t that contains one or more bits from the
94   // lldb::Permissions
SetLLDBPermissions(uint32_t permissions)95   void SetLLDBPermissions(uint32_t permissions) {
96     m_read = (permissions & lldb::ePermissionsReadable) ? eYes : eNo;
97     m_write = (permissions & lldb::ePermissionsWritable) ? eYes : eNo;
98     m_execute = (permissions & lldb::ePermissionsExecutable) ? eYes : eNo;
99   }
100 
101   bool operator==(const MemoryRegionInfo &rhs) const {
102     return m_range == rhs.m_range && m_read == rhs.m_read &&
103            m_write == rhs.m_write && m_execute == rhs.m_execute &&
104            m_shared == rhs.m_shared &&
105            m_mapped == rhs.m_mapped && m_name == rhs.m_name &&
106            m_flash == rhs.m_flash && m_blocksize == rhs.m_blocksize &&
107            m_memory_tagged == rhs.m_memory_tagged &&
108            m_pagesize == rhs.m_pagesize &&
109            m_is_stack_memory == rhs.m_is_stack_memory;
110   }
111 
112   bool operator!=(const MemoryRegionInfo &rhs) const { return !(*this == rhs); }
113 
114   /// Get the target system's VM page size in bytes.
115   /// \return
116   ///     0 is returned if this information is unavailable.
GetPageSize()117   int GetPageSize() const { return m_pagesize; }
118 
119   /// Get a vector of target VM pages that are dirty -- that have been
120   /// modified -- within this memory region.  This is an Optional return
121   /// value; it will only be available if the remote stub was able to
122   /// detail this.
GetDirtyPageList()123   const std::optional<std::vector<lldb::addr_t>> &GetDirtyPageList() const {
124     return m_dirty_pages;
125   }
126 
IsStackMemory()127   OptionalBool IsStackMemory() const { return m_is_stack_memory; }
128 
SetIsStackMemory(OptionalBool val)129   void SetIsStackMemory(OptionalBool val) { m_is_stack_memory = val; }
130 
SetPageSize(int pagesize)131   void SetPageSize(int pagesize) { m_pagesize = pagesize; }
132 
SetDirtyPageList(std::vector<lldb::addr_t> pagelist)133   void SetDirtyPageList(std::vector<lldb::addr_t> pagelist) {
134     if (m_dirty_pages)
135       m_dirty_pages->clear();
136     m_dirty_pages = std::move(pagelist);
137   }
138 
139 protected:
140   RangeType m_range;
141   OptionalBool m_read = eDontKnow;
142   OptionalBool m_write = eDontKnow;
143   OptionalBool m_execute = eDontKnow;
144   OptionalBool m_shared = eDontKnow;
145   OptionalBool m_mapped = eDontKnow;
146   ConstString m_name;
147   OptionalBool m_flash = eDontKnow;
148   lldb::offset_t m_blocksize = 0;
149   OptionalBool m_memory_tagged = eDontKnow;
150   OptionalBool m_is_stack_memory = eDontKnow;
151   int m_pagesize = 0;
152   std::optional<std::vector<lldb::addr_t>> m_dirty_pages;
153 };
154 
155 inline bool operator<(const MemoryRegionInfo &lhs,
156                       const MemoryRegionInfo &rhs) {
157   return lhs.GetRange() < rhs.GetRange();
158 }
159 
160 inline bool operator<(const MemoryRegionInfo &lhs, lldb::addr_t rhs) {
161   return lhs.GetRange().GetRangeBase() < rhs;
162 }
163 
164 inline bool operator<(lldb::addr_t lhs, const MemoryRegionInfo &rhs) {
165   return lhs < rhs.GetRange().GetRangeBase();
166 }
167 
168 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
169                               const MemoryRegionInfo &Info);
170 
171 // Forward-declarable wrapper.
172 class MemoryRegionInfos : public std::vector<lldb_private::MemoryRegionInfo> {
173 public:
174   using std::vector<lldb_private::MemoryRegionInfo>::vector;
175 };
176 
177 }
178 
179 namespace llvm {
180 template <>
181 /// If Options is empty, prints a textual representation of the value. If
182 /// Options is a single character, it uses that character for the "yes" value,
183 /// while "no" is printed as "-", and "don't know" as "?". This can be used to
184 /// print the permissions in the traditional "rwx" form.
185 struct format_provider<lldb_private::MemoryRegionInfo::OptionalBool> {
186   static void format(const lldb_private::MemoryRegionInfo::OptionalBool &B,
187                      raw_ostream &OS, StringRef Options);
188 };
189 }
190 
191 #endif // LLDB_TARGET_MEMORYREGIONINFO_H
192