1 //===-- ProcessElfCore.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 // Notes about Linux Process core dumps:
8 // 1) Linux core dump is stored as ELF file.
9 // 2) The ELF file's PT_NOTE and PT_LOAD segments describes the program's
10 // address space and thread contexts.
11 // 3) PT_NOTE segment contains note entries which describes a thread context.
12 // 4) PT_LOAD segment describes a valid contiguous range of process address
14 //===----------------------------------------------------------------------===//
16 #ifndef liblldb_ProcessElfCore_h_
17 #define liblldb_ProcessElfCore_h_
22 #include "lldb/Target/Process.h"
23 #include "lldb/Utility/ConstString.h"
24 #include "lldb/Utility/Status.h"
26 #include "Plugins/ObjectFile/ELF/ELFHeader.h"
27 #include "Plugins/Process/elf-core/RegisterUtilities.h"
31 class ProcessElfCore : public lldb_private::Process {
33 // Constructors and Destructors
34 static lldb::ProcessSP
35 CreateInstance(lldb::TargetSP target_sp, lldb::ListenerSP listener_sp,
36 const lldb_private::FileSpec *crash_file_path);
38 static void Initialize();
40 static void Terminate();
42 static lldb_private::ConstString GetPluginNameStatic();
44 static const char *GetPluginDescriptionStatic();
46 // Constructors and Destructors
47 ProcessElfCore(lldb::TargetSP target_sp, lldb::ListenerSP listener_sp,
48 const lldb_private::FileSpec &core_file);
50 ~ProcessElfCore() override;
52 // Check if a given Process
53 bool CanDebug(lldb::TargetSP target_sp,
54 bool plugin_specified_by_name) override;
56 // Creating a new process, or attaching to an existing one
57 lldb_private::Status DoLoadCore() override;
59 lldb_private::DynamicLoader *GetDynamicLoader() override;
61 // PluginInterface protocol
62 lldb_private::ConstString GetPluginName() override;
64 uint32_t GetPluginVersion() override;
67 lldb_private::Status DoDestroy() override;
69 void RefreshStateAfterStop() override;
71 lldb_private::Status WillResume() override {
72 lldb_private::Status error;
73 error.SetErrorStringWithFormat(
74 "error: %s does not support resuming processes",
75 GetPluginName().GetCString());
80 bool IsAlive() override;
82 bool WarnBeforeDetach() const override { return false; }
85 size_t ReadMemory(lldb::addr_t addr, void *buf, size_t size,
86 lldb_private::Status &error) override;
88 size_t DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
89 lldb_private::Status &error) override;
92 GetMemoryRegionInfo(lldb::addr_t load_addr,
93 lldb_private::MemoryRegionInfo ®ion_info) override;
95 lldb::addr_t GetImageInfoAddress() override;
97 lldb_private::ArchSpec GetArchitecture();
99 // Returns AUXV structure found in the core file
100 lldb_private::DataExtractor GetAuxvData() override;
102 bool GetProcessInfo(lldb_private::ProcessInstanceInfo &info) override;
107 bool UpdateThreadList(lldb_private::ThreadList &old_thread_list,
108 lldb_private::ThreadList &new_thread_list) override;
111 struct NT_FILE_Entry {
114 lldb::addr_t file_ofs;
115 lldb_private::ConstString path;
118 // For ProcessElfCore only
119 typedef lldb_private::Range<lldb::addr_t, lldb::addr_t> FileRange;
120 typedef lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t, FileRange>
122 typedef lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t, uint32_t>
123 VMRangeToPermissions;
125 lldb::ModuleSP m_core_module_sp;
126 lldb_private::FileSpec m_core_file;
127 std::string m_dyld_plugin_name;
128 DISALLOW_COPY_AND_ASSIGN(ProcessElfCore);
130 // True if m_thread_contexts contains valid entries
131 bool m_thread_data_valid = false;
133 // Contain thread data read from NOTE segments
134 std::vector<ThreadData> m_thread_data;
136 // AUXV structure found from the NOTE segment
137 lldb_private::DataExtractor m_auxv;
139 // Address ranges found in the core
140 VMRangeToFileOffset m_core_aranges;
142 // Permissions for all ranges
143 VMRangeToPermissions m_core_range_infos;
145 // NT_FILE entries found from the NOTE segment
146 std::vector<NT_FILE_Entry> m_nt_file_entries;
148 // Parse thread(s) data structures(prstatus, prpsinfo) from given NOTE segment
149 llvm::Error ParseThreadContextsFromNoteSegment(
150 const elf::ELFProgramHeader &segment_header,
151 lldb_private::DataExtractor segment_data);
153 // Returns number of thread contexts stored in the core file
154 uint32_t GetNumThreadContexts();
156 // Parse a contiguous address range of the process from LOAD segment
158 AddAddressRangeFromLoadSegment(const elf::ELFProgramHeader &header);
160 llvm::Expected<std::vector<lldb_private::CoreNote>>
161 parseSegment(const lldb_private::DataExtractor &segment);
162 llvm::Error parseFreeBSDNotes(llvm::ArrayRef<lldb_private::CoreNote> notes);
163 llvm::Error parseNetBSDNotes(llvm::ArrayRef<lldb_private::CoreNote> notes);
164 llvm::Error parseOpenBSDNotes(llvm::ArrayRef<lldb_private::CoreNote> notes);
165 llvm::Error parseLinuxNotes(llvm::ArrayRef<lldb_private::CoreNote> notes);
168 #endif // liblldb_ProcessElfCore_h_