1 //===-- Section.h -----------------------------------------------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
9 #ifndef liblldb_Section_h_
10 #define liblldb_Section_h_
12 #include "lldb/Core/ModuleChild.h"
13 #include "lldb/Utility/ConstString.h"
14 #include "lldb/Utility/Flags.h"
15 #include "lldb/Utility/UserID.h"
16 #include "lldb/lldb-defines.h"
17 #include "lldb/lldb-enumerations.h"
18 #include "lldb/lldb-forward.h"
19 #include "lldb/lldb-types.h"
27 namespace lldb_private {
37 typedef std::vector<lldb::SectionSP> collection;
38 typedef collection::iterator iterator;
39 typedef collection::const_iterator const_iterator;
41 const_iterator begin() const { return m_sections.begin(); }
42 const_iterator end() const { return m_sections.end(); }
43 const_iterator begin() { return m_sections.begin(); }
44 const_iterator end() { return m_sections.end(); }
50 SectionList &operator=(const SectionList &rhs);
52 size_t AddSection(const lldb::SectionSP §ion_sp);
54 size_t AddUniqueSection(const lldb::SectionSP §ion_sp);
56 size_t FindSectionIndex(const Section *sect);
58 bool ContainsSection(lldb::user_id_t sect_id) const;
60 void Dump(Stream *s, Target *target, bool show_header, uint32_t depth) const;
62 lldb::SectionSP FindSectionByName(ConstString section_dstr) const;
64 lldb::SectionSP FindSectionByID(lldb::user_id_t sect_id) const;
66 lldb::SectionSP FindSectionByType(lldb::SectionType sect_type,
68 size_t start_idx = 0) const;
71 FindSectionContainingFileAddress(lldb::addr_t addr,
72 uint32_t depth = UINT32_MAX) const;
74 // Get the number of sections in this list only
75 size_t GetSize() const { return m_sections.size(); }
77 // Get the number of sections in this list, and any contained child sections
78 size_t GetNumSections(uint32_t depth) const;
80 bool ReplaceSection(lldb::user_id_t sect_id,
81 const lldb::SectionSP §ion_sp,
82 uint32_t depth = UINT32_MAX);
84 // Warning, this can be slow as it's removing items from a std::vector.
85 bool DeleteSection(size_t idx);
87 lldb::SectionSP GetSectionAtIndex(size_t idx) const;
89 size_t Slide(lldb::addr_t slide_amount, bool slide_children);
91 void Clear() { m_sections.clear(); }
94 collection m_sections;
97 class Section : public std::enable_shared_from_this<Section>,
102 // Create a root section (one that has no parent)
103 Section(const lldb::ModuleSP &module_sp, ObjectFile *obj_file,
104 lldb::user_id_t sect_id, ConstString name,
105 lldb::SectionType sect_type, lldb::addr_t file_vm_addr,
106 lldb::addr_t vm_size, lldb::offset_t file_offset,
107 lldb::offset_t file_size, uint32_t log2align, uint32_t flags,
108 uint32_t target_byte_size = 1);
110 // Create a section that is a child of parent_section_sp
111 Section(const lldb::SectionSP &parent_section_sp, // NULL for top level
112 // sections, non-NULL for
114 const lldb::ModuleSP &module_sp, ObjectFile *obj_file,
115 lldb::user_id_t sect_id, ConstString name,
116 lldb::SectionType sect_type, lldb::addr_t file_vm_addr,
117 lldb::addr_t vm_size, lldb::offset_t file_offset,
118 lldb::offset_t file_size, uint32_t log2align, uint32_t flags,
119 uint32_t target_byte_size = 1);
123 static int Compare(const Section &a, const Section &b);
125 bool ContainsFileAddress(lldb::addr_t vm_addr) const;
127 SectionList &GetChildren() { return m_children; }
129 const SectionList &GetChildren() const { return m_children; }
131 void Dump(Stream *s, Target *target, uint32_t depth) const;
133 void DumpName(Stream *s) const;
135 lldb::addr_t GetLoadBaseAddress(Target *target) const;
137 bool ResolveContainedAddress(lldb::addr_t offset, Address &so_addr,
138 bool allow_section_end = false) const;
140 lldb::offset_t GetFileOffset() const { return m_file_offset; }
142 void SetFileOffset(lldb::offset_t file_offset) {
143 m_file_offset = file_offset;
146 lldb::offset_t GetFileSize() const { return m_file_size; }
148 void SetFileSize(lldb::offset_t file_size) { m_file_size = file_size; }
150 lldb::addr_t GetFileAddress() const;
152 bool SetFileAddress(lldb::addr_t file_addr);
154 lldb::addr_t GetOffset() const;
156 lldb::addr_t GetByteSize() const { return m_byte_size; }
158 void SetByteSize(lldb::addr_t byte_size) { m_byte_size = byte_size; }
160 bool IsFake() const { return m_fake; }
162 void SetIsFake(bool fake) { m_fake = fake; }
164 bool IsEncrypted() const { return m_encrypted; }
166 void SetIsEncrypted(bool b) { m_encrypted = b; }
168 bool IsDescendant(const Section *section);
170 ConstString GetName() const { return m_name; }
172 bool Slide(lldb::addr_t slide_amount, bool slide_children);
174 lldb::SectionType GetType() const { return m_type; }
176 const char *GetTypeAsCString() const;
178 lldb::SectionSP GetParent() const { return m_parent_wp.lock(); }
180 bool IsThreadSpecific() const { return m_thread_specific; }
182 void SetIsThreadSpecific(bool b) { m_thread_specific = b; }
184 /// Get the permissions as OR'ed bits from lldb::Permissions
185 uint32_t GetPermissions() const;
187 /// Set the permissions using bits OR'ed from lldb::Permissions
188 void SetPermissions(uint32_t permissions);
190 ObjectFile *GetObjectFile() { return m_obj_file; }
191 const ObjectFile *GetObjectFile() const { return m_obj_file; }
193 /// Read the section data from the object file that the section
197 /// Where to place the data
199 /// \param[in] dst_len
200 /// How many bytes of section data to read
202 /// \param[in] offset
203 /// The offset in bytes within this section's data at which to
204 /// start copying data from.
207 /// The number of bytes read from the section, or zero if the
208 /// section has no data or \a offset is not a valid offset
210 lldb::offset_t GetSectionData(void *dst, lldb::offset_t dst_len,
211 lldb::offset_t offset = 0);
213 /// Get the shared reference to the section data from the object
214 /// file that the section resides in. No copies of the data will be
215 /// make unless the object file has been read from memory. If the
216 /// object file is on disk, it will shared the mmap data for the
217 /// entire object file.
220 /// Where to place the data, address byte size, and byte order
223 /// The number of bytes read from the section, or zero if the
224 /// section has no data or \a offset is not a valid offset
226 lldb::offset_t GetSectionData(DataExtractor &data);
228 uint32_t GetLog2Align() { return m_log2align; }
230 void SetLog2Align(uint32_t align) { m_log2align = align; }
232 // Get the number of host bytes required to hold a target byte
233 uint32_t GetTargetByteSize() const { return m_target_byte_size; }
235 bool IsRelocated() const { return m_relocated; }
237 void SetIsRelocated(bool b) { m_relocated = b; }
240 ObjectFile *m_obj_file; // The object file that data for this section should
242 lldb::SectionType m_type; // The type of this section
243 lldb::SectionWP m_parent_wp; // Weak pointer to parent section
244 ConstString m_name; // Name of this section
245 lldb::addr_t m_file_addr; // The absolute file virtual address range of this
246 // section if m_parent == NULL,
247 // offset from parent file virtual address if m_parent != NULL
248 lldb::addr_t m_byte_size; // Size in bytes that this section will occupy in
250 lldb::offset_t m_file_offset; // Object file offset (if any)
251 lldb::offset_t m_file_size; // Object file size (can be smaller than
252 // m_byte_size for zero filled sections...)
253 uint32_t m_log2align; // log_2(align) of the section (i.e. section has to be
254 // aligned to 2^m_log2align)
255 SectionList m_children; // Child sections
256 bool m_fake : 1, // If true, then this section only can contain the address if
258 // children contains an address. This allows for gaps between the
259 // children that are contained in the address range for this section, but
260 // do not produce hits unless the children contain the address.
261 m_encrypted : 1, // Set to true if the contents are encrypted
262 m_thread_specific : 1, // This section is thread specific
263 m_readable : 1, // If this section has read permissions
264 m_writable : 1, // If this section has write permissions
265 m_executable : 1, // If this section has executable permissions
266 m_relocated : 1; // If this section has had relocations applied
267 uint32_t m_target_byte_size; // Some architectures have non-8-bit byte size.
268 // This is specified as
269 // as a multiple number of a host bytes
271 DISALLOW_COPY_AND_ASSIGN(Section);
274 } // namespace lldb_private
276 #endif // liblldb_Section_h_