1 //===-- ObjectContainer.h ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef liblldb_ObjectContainer_h_
11 #define liblldb_ObjectContainer_h_
15 // Other libraries and framework includes
17 #include "lldb/Core/ModuleChild.h"
18 #include "lldb/Core/PluginInterface.h"
19 #include "lldb/Utility/DataExtractor.h"
20 #include "lldb/Utility/Endian.h"
21 #include "lldb/Utility/FileSpec.h"
22 #include "lldb/lldb-private.h"
24 namespace lldb_private {
26 //----------------------------------------------------------------------
27 /// @class ObjectContainer ObjectContainer.h "lldb/Symbol/ObjectContainer.h"
28 /// A plug-in interface definition class for object containers.
30 /// Object containers contain object files from one or more architectures, and
31 /// also can contain one or more named objects.
33 /// Typical object containers are static libraries (.a files) that contain
34 /// multiple named object files, and universal files that contain multiple
36 //----------------------------------------------------------------------
37 class ObjectContainer : public PluginInterface, public ModuleChild {
39 //------------------------------------------------------------------
40 /// Construct with a parent module, offset, and header data.
42 /// Object files belong to modules and a valid module must be supplied upon
43 /// construction. The at an offset within a file for objects that contain
44 /// more than one architecture or object.
45 //------------------------------------------------------------------
46 ObjectContainer(const lldb::ModuleSP &module_sp, const FileSpec *file,
47 lldb::offset_t file_offset, lldb::offset_t length,
48 lldb::DataBufferSP &data_sp, lldb::offset_t data_offset)
49 : ModuleChild(module_sp),
50 m_file(), // This file can be different than the module's file spec
51 m_offset(file_offset), m_length(length), m_data() {
55 m_data.SetData(data_sp, data_offset, length);
58 //------------------------------------------------------------------
61 /// The destructor is virtual since this class is designed to be inherited
62 /// from by the plug-in instance.
63 //------------------------------------------------------------------
64 ~ObjectContainer() override = default;
66 //------------------------------------------------------------------
67 /// Dump a description of this object to a Stream.
69 /// Dump a description of the current contents of this object to the
70 /// supplied stream \a s. The dumping should include the section list if it
71 /// has been parsed, and the symbol table if it has been parsed.
74 /// The stream to which to dump the object description.
75 //------------------------------------------------------------------
76 virtual void Dump(Stream *s) const = 0;
78 //------------------------------------------------------------------
79 /// Gets the architecture given an index.
81 /// Copies the architecture specification for index \a idx.
84 /// The architecture index to extract.
87 /// A architecture object that will be filled in if \a idx is a
88 /// architecture valid index.
91 /// Returns \b true if \a idx is valid and \a arch has been
92 /// filled in, \b false otherwise.
94 /// @see ObjectContainer::GetNumArchitectures() const
95 //------------------------------------------------------------------
96 virtual bool GetArchitectureAtIndex(uint32_t idx, ArchSpec &arch) const {
100 //------------------------------------------------------------------
101 /// Returns the offset into a file at which this object resides.
103 /// Some files contain many object files, and this function allows access to
104 /// an object's offset within the file.
107 /// The offset in bytes into the file. Defaults to zero for
108 /// simple object files that a represented by an entire file.
109 //------------------------------------------------------------------
110 virtual lldb::addr_t GetOffset() const { return m_offset; }
112 virtual lldb::addr_t GetByteSize() const { return m_length; }
114 //------------------------------------------------------------------
115 /// Get the number of objects within this object file (archives).
118 /// Zero for object files that are not archives, or the number
119 /// of objects contained in the archive.
120 //------------------------------------------------------------------
121 virtual size_t GetNumObjects() const { return 0; }
123 //------------------------------------------------------------------
124 /// Get the number of architectures in this object file.
126 /// The default implementation returns 1 as for object files that contain a
127 /// single architecture. ObjectContainer instances that contain more than
128 /// one architecture should override this function and return an appropriate
132 /// The number of architectures contained in this object file.
133 //------------------------------------------------------------------
134 virtual size_t GetNumArchitectures() const { return 0; }
136 //------------------------------------------------------------------
137 /// Attempts to parse the object header.
139 /// This function is used as a test to see if a given plug-in instance can
140 /// parse the header data already contained in ObjectContainer::m_data. If
141 /// an object file parser does not recognize that magic bytes in a header,
142 /// false should be returned and the next plug-in can attempt to parse an
146 /// Returns \b true if the header was parsed successfully, \b
148 //------------------------------------------------------------------
149 virtual bool ParseHeader() = 0;
151 //------------------------------------------------------------------
152 /// Selects an architecture in an object file.
154 /// Object files that contain a single architecture should verify that the
155 /// specified \a arch matches the architecture in in object file and return
156 /// \b true or \b false accordingly.
158 /// Object files that contain more than one architecture should attempt to
159 /// select that architecture, and if successful, clear out any previous
160 /// state from any previously selected architecture and prepare to return
161 /// information for the new architecture.
164 /// Returns a pointer to the object file of the requested \a
165 /// arch and optional \a name. Returns nullptr of no such object
166 /// file exists in the container.
167 //------------------------------------------------------------------
168 virtual lldb::ObjectFileSP GetObjectFile(const FileSpec *file) = 0;
170 virtual bool ObjectAtIndexIsContainer(uint32_t object_idx) { return false; }
172 virtual ObjectFile *GetObjectFileAtIndex(uint32_t object_idx) {
176 virtual ObjectContainer *GetObjectContainerAtIndex(uint32_t object_idx) {
180 virtual const char *GetObjectNameAtIndex(uint32_t object_idx) const {
185 //------------------------------------------------------------------
187 //------------------------------------------------------------------
188 FileSpec m_file; ///< The file that represents this container objects (which
189 ///can be different from the module's file).
191 m_offset; ///< The offset in bytes into the file, or the address in memory
192 lldb::addr_t m_length; ///< The size in bytes if known (can be zero).
194 m_data; ///< The data for this object file so things can be parsed lazily.
197 DISALLOW_COPY_AND_ASSIGN(ObjectContainer);
200 } // namespace lldb_private
202 #endif // liblldb_ObjectContainer_h_