| File: | build/source/lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp |
| Warning: | line 710, column 13 Value stored to 'had_nt_regs' is never read |
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| 1 | //===-- ProcessElfCore.cpp ------------------------------------------------===// |
| 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 | #include <cstdlib> |
| 10 | |
| 11 | #include <memory> |
| 12 | #include <mutex> |
| 13 | |
| 14 | #include "lldb/Core/Module.h" |
| 15 | #include "lldb/Core/ModuleSpec.h" |
| 16 | #include "lldb/Core/PluginManager.h" |
| 17 | #include "lldb/Core/Section.h" |
| 18 | #include "lldb/Target/ABI.h" |
| 19 | #include "lldb/Target/DynamicLoader.h" |
| 20 | #include "lldb/Target/MemoryRegionInfo.h" |
| 21 | #include "lldb/Target/Target.h" |
| 22 | #include "lldb/Target/UnixSignals.h" |
| 23 | #include "lldb/Utility/DataBufferHeap.h" |
| 24 | #include "lldb/Utility/LLDBLog.h" |
| 25 | #include "lldb/Utility/Log.h" |
| 26 | #include "lldb/Utility/State.h" |
| 27 | |
| 28 | #include "llvm/BinaryFormat/ELF.h" |
| 29 | #include "llvm/Support/Threading.h" |
| 30 | |
| 31 | #include "Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.h" |
| 32 | #include "Plugins/ObjectFile/ELF/ObjectFileELF.h" |
| 33 | #include "Plugins/Process/elf-core/RegisterUtilities.h" |
| 34 | #include "ProcessElfCore.h" |
| 35 | #include "ThreadElfCore.h" |
| 36 | |
| 37 | using namespace lldb_private; |
| 38 | namespace ELF = llvm::ELF; |
| 39 | |
| 40 | LLDB_PLUGIN_DEFINE(ProcessElfCore)namespace lldb_private { void lldb_initialize_ProcessElfCore( ) { ProcessElfCore::Initialize(); } void lldb_terminate_ProcessElfCore () { ProcessElfCore::Terminate(); } } |
| 41 | |
| 42 | llvm::StringRef ProcessElfCore::GetPluginDescriptionStatic() { |
| 43 | return "ELF core dump plug-in."; |
| 44 | } |
| 45 | |
| 46 | void ProcessElfCore::Terminate() { |
| 47 | PluginManager::UnregisterPlugin(ProcessElfCore::CreateInstance); |
| 48 | } |
| 49 | |
| 50 | lldb::ProcessSP ProcessElfCore::CreateInstance(lldb::TargetSP target_sp, |
| 51 | lldb::ListenerSP listener_sp, |
| 52 | const FileSpec *crash_file, |
| 53 | bool can_connect) { |
| 54 | lldb::ProcessSP process_sp; |
| 55 | if (crash_file && !can_connect) { |
| 56 | // Read enough data for a ELF32 header or ELF64 header Note: Here we care |
| 57 | // about e_type field only, so it is safe to ignore possible presence of |
| 58 | // the header extension. |
| 59 | const size_t header_size = sizeof(llvm::ELF::Elf64_Ehdr); |
| 60 | |
| 61 | auto data_sp = FileSystem::Instance().CreateDataBuffer( |
| 62 | crash_file->GetPath(), header_size, 0); |
| 63 | if (data_sp && data_sp->GetByteSize() == header_size && |
| 64 | elf::ELFHeader::MagicBytesMatch(data_sp->GetBytes())) { |
| 65 | elf::ELFHeader elf_header; |
| 66 | DataExtractor data(data_sp, lldb::eByteOrderLittle, 4); |
| 67 | lldb::offset_t data_offset = 0; |
| 68 | if (elf_header.Parse(data, &data_offset)) { |
| 69 | // Check whether we're dealing with a raw FreeBSD "full memory dump" |
| 70 | // ELF vmcore that needs to be handled via FreeBSDKernel plugin instead. |
| 71 | if (elf_header.e_ident[7] == 0xFF && elf_header.e_version == 0) |
| 72 | return process_sp; |
| 73 | if (elf_header.e_type == llvm::ELF::ET_CORE) |
| 74 | process_sp = std::make_shared<ProcessElfCore>(target_sp, listener_sp, |
| 75 | *crash_file); |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | return process_sp; |
| 80 | } |
| 81 | |
| 82 | bool ProcessElfCore::CanDebug(lldb::TargetSP target_sp, |
| 83 | bool plugin_specified_by_name) { |
| 84 | // For now we are just making sure the file exists for a given module |
| 85 | if (!m_core_module_sp && FileSystem::Instance().Exists(m_core_file)) { |
| 86 | ModuleSpec core_module_spec(m_core_file, target_sp->GetArchitecture()); |
| 87 | Status error(ModuleList::GetSharedModule(core_module_spec, m_core_module_sp, |
| 88 | nullptr, nullptr, nullptr)); |
| 89 | if (m_core_module_sp) { |
| 90 | ObjectFile *core_objfile = m_core_module_sp->GetObjectFile(); |
| 91 | if (core_objfile && core_objfile->GetType() == ObjectFile::eTypeCoreFile) |
| 92 | return true; |
| 93 | } |
| 94 | } |
| 95 | return false; |
| 96 | } |
| 97 | |
| 98 | // ProcessElfCore constructor |
| 99 | ProcessElfCore::ProcessElfCore(lldb::TargetSP target_sp, |
| 100 | lldb::ListenerSP listener_sp, |
| 101 | const FileSpec &core_file) |
| 102 | : PostMortemProcess(target_sp, listener_sp), m_core_file(core_file) {} |
| 103 | |
| 104 | // Destructor |
| 105 | ProcessElfCore::~ProcessElfCore() { |
| 106 | Clear(); |
| 107 | // We need to call finalize on the process before destroying ourselves to |
| 108 | // make sure all of the broadcaster cleanup goes as planned. If we destruct |
| 109 | // this class, then Process::~Process() might have problems trying to fully |
| 110 | // destroy the broadcaster. |
| 111 | Finalize(); |
| 112 | } |
| 113 | |
| 114 | lldb::addr_t ProcessElfCore::AddAddressRangeFromLoadSegment( |
| 115 | const elf::ELFProgramHeader &header) { |
| 116 | const lldb::addr_t addr = header.p_vaddr; |
| 117 | FileRange file_range(header.p_offset, header.p_filesz); |
| 118 | VMRangeToFileOffset::Entry range_entry(addr, header.p_memsz, file_range); |
| 119 | |
| 120 | // Only add to m_core_aranges if the file size is non zero. Some core files |
| 121 | // have PT_LOAD segments for all address ranges, but set f_filesz to zero for |
| 122 | // the .text sections since they can be retrieved from the object files. |
| 123 | if (header.p_filesz > 0) { |
| 124 | VMRangeToFileOffset::Entry *last_entry = m_core_aranges.Back(); |
| 125 | if (last_entry && last_entry->GetRangeEnd() == range_entry.GetRangeBase() && |
| 126 | last_entry->data.GetRangeEnd() == range_entry.data.GetRangeBase() && |
| 127 | last_entry->GetByteSize() == last_entry->data.GetByteSize()) { |
| 128 | last_entry->SetRangeEnd(range_entry.GetRangeEnd()); |
| 129 | last_entry->data.SetRangeEnd(range_entry.data.GetRangeEnd()); |
| 130 | } else { |
| 131 | m_core_aranges.Append(range_entry); |
| 132 | } |
| 133 | } |
| 134 | // Keep a separate map of permissions that that isn't coalesced so all ranges |
| 135 | // are maintained. |
| 136 | const uint32_t permissions = |
| 137 | ((header.p_flags & llvm::ELF::PF_R) ? lldb::ePermissionsReadable : 0u) | |
| 138 | ((header.p_flags & llvm::ELF::PF_W) ? lldb::ePermissionsWritable : 0u) | |
| 139 | ((header.p_flags & llvm::ELF::PF_X) ? lldb::ePermissionsExecutable : 0u); |
| 140 | |
| 141 | m_core_range_infos.Append( |
| 142 | VMRangeToPermissions::Entry(addr, header.p_memsz, permissions)); |
| 143 | |
| 144 | return addr; |
| 145 | } |
| 146 | |
| 147 | lldb::addr_t ProcessElfCore::AddAddressRangeFromMemoryTagSegment( |
| 148 | const elf::ELFProgramHeader &header) { |
| 149 | // If lldb understood multiple kinds of tag segments we would record the type |
| 150 | // of the segment here also. As long as there is only 1 type lldb looks for, |
| 151 | // there is no need. |
| 152 | FileRange file_range(header.p_offset, header.p_filesz); |
| 153 | m_core_tag_ranges.Append( |
| 154 | VMRangeToFileOffset::Entry(header.p_vaddr, header.p_memsz, file_range)); |
| 155 | |
| 156 | return header.p_vaddr; |
| 157 | } |
| 158 | |
| 159 | // Process Control |
| 160 | Status ProcessElfCore::DoLoadCore() { |
| 161 | Status error; |
| 162 | if (!m_core_module_sp) { |
| 163 | error.SetErrorString("invalid core module"); |
| 164 | return error; |
| 165 | } |
| 166 | |
| 167 | ObjectFileELF *core = (ObjectFileELF *)(m_core_module_sp->GetObjectFile()); |
| 168 | if (core == nullptr) { |
| 169 | error.SetErrorString("invalid core object file"); |
| 170 | return error; |
| 171 | } |
| 172 | |
| 173 | llvm::ArrayRef<elf::ELFProgramHeader> segments = core->ProgramHeaders(); |
| 174 | if (segments.size() == 0) { |
| 175 | error.SetErrorString("core file has no segments"); |
| 176 | return error; |
| 177 | } |
| 178 | |
| 179 | SetCanJIT(false); |
| 180 | |
| 181 | m_thread_data_valid = true; |
| 182 | |
| 183 | bool ranges_are_sorted = true; |
| 184 | lldb::addr_t vm_addr = 0; |
| 185 | lldb::addr_t tag_addr = 0; |
| 186 | /// Walk through segments and Thread and Address Map information. |
| 187 | /// PT_NOTE - Contains Thread and Register information |
| 188 | /// PT_LOAD - Contains a contiguous range of Process Address Space |
| 189 | /// PT_AARCH64_MEMTAG_MTE - Contains AArch64 MTE memory tags for a range of |
| 190 | /// Process Address Space. |
| 191 | for (const elf::ELFProgramHeader &H : segments) { |
| 192 | DataExtractor data = core->GetSegmentData(H); |
| 193 | |
| 194 | // Parse thread contexts and auxv structure |
| 195 | if (H.p_type == llvm::ELF::PT_NOTE) { |
| 196 | if (llvm::Error error = ParseThreadContextsFromNoteSegment(H, data)) |
| 197 | return Status(std::move(error)); |
| 198 | } |
| 199 | // PT_LOAD segments contains address map |
| 200 | if (H.p_type == llvm::ELF::PT_LOAD) { |
| 201 | lldb::addr_t last_addr = AddAddressRangeFromLoadSegment(H); |
| 202 | if (vm_addr > last_addr) |
| 203 | ranges_are_sorted = false; |
| 204 | vm_addr = last_addr; |
| 205 | } else if (H.p_type == llvm::ELF::PT_AARCH64_MEMTAG_MTE) { |
| 206 | lldb::addr_t last_addr = AddAddressRangeFromMemoryTagSegment(H); |
| 207 | if (tag_addr > last_addr) |
| 208 | ranges_are_sorted = false; |
| 209 | tag_addr = last_addr; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | if (!ranges_are_sorted) { |
| 214 | m_core_aranges.Sort(); |
| 215 | m_core_range_infos.Sort(); |
| 216 | m_core_tag_ranges.Sort(); |
| 217 | } |
| 218 | |
| 219 | // Even if the architecture is set in the target, we need to override it to |
| 220 | // match the core file which is always single arch. |
| 221 | ArchSpec arch(m_core_module_sp->GetArchitecture()); |
| 222 | |
| 223 | ArchSpec target_arch = GetTarget().GetArchitecture(); |
| 224 | ArchSpec core_arch(m_core_module_sp->GetArchitecture()); |
| 225 | target_arch.MergeFrom(core_arch); |
| 226 | GetTarget().SetArchitecture(target_arch); |
| 227 | |
| 228 | SetUnixSignals(UnixSignals::Create(GetArchitecture())); |
| 229 | |
| 230 | // Ensure we found at least one thread that was stopped on a signal. |
| 231 | bool siginfo_signal_found = false; |
| 232 | bool prstatus_signal_found = false; |
| 233 | // Check we found a signal in a SIGINFO note. |
| 234 | for (const auto &thread_data : m_thread_data) { |
| 235 | if (thread_data.signo != 0) |
| 236 | siginfo_signal_found = true; |
| 237 | if (thread_data.prstatus_sig != 0) |
| 238 | prstatus_signal_found = true; |
| 239 | } |
| 240 | if (!siginfo_signal_found) { |
| 241 | // If we don't have signal from SIGINFO use the signal from each threads |
| 242 | // PRSTATUS note. |
| 243 | if (prstatus_signal_found) { |
| 244 | for (auto &thread_data : m_thread_data) |
| 245 | thread_data.signo = thread_data.prstatus_sig; |
| 246 | } else if (m_thread_data.size() > 0) { |
| 247 | // If all else fails force the first thread to be SIGSTOP |
| 248 | m_thread_data.begin()->signo = |
| 249 | GetUnixSignals()->GetSignalNumberFromName("SIGSTOP"); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | // Core files are useless without the main executable. See if we can locate |
| 254 | // the main executable using data we found in the core file notes. |
| 255 | lldb::ModuleSP exe_module_sp = GetTarget().GetExecutableModule(); |
| 256 | if (!exe_module_sp) { |
| 257 | // The first entry in the NT_FILE might be our executable |
| 258 | if (!m_nt_file_entries.empty()) { |
| 259 | ModuleSpec exe_module_spec; |
| 260 | exe_module_spec.GetArchitecture() = arch; |
| 261 | exe_module_spec.GetFileSpec().SetFile( |
| 262 | m_nt_file_entries[0].path.GetCString(), FileSpec::Style::native); |
| 263 | if (exe_module_spec.GetFileSpec()) { |
| 264 | exe_module_sp = GetTarget().GetOrCreateModule(exe_module_spec, |
| 265 | true /* notify */); |
| 266 | if (exe_module_sp) |
| 267 | GetTarget().SetExecutableModule(exe_module_sp, eLoadDependentsNo); |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | return error; |
| 272 | } |
| 273 | |
| 274 | lldb_private::DynamicLoader *ProcessElfCore::GetDynamicLoader() { |
| 275 | if (m_dyld_up.get() == nullptr) |
| 276 | m_dyld_up.reset(DynamicLoader::FindPlugin( |
| 277 | this, DynamicLoaderPOSIXDYLD::GetPluginNameStatic())); |
| 278 | return m_dyld_up.get(); |
| 279 | } |
| 280 | |
| 281 | bool ProcessElfCore::DoUpdateThreadList(ThreadList &old_thread_list, |
| 282 | ThreadList &new_thread_list) { |
| 283 | const uint32_t num_threads = GetNumThreadContexts(); |
| 284 | if (!m_thread_data_valid) |
| 285 | return false; |
| 286 | |
| 287 | for (lldb::tid_t tid = 0; tid < num_threads; ++tid) { |
| 288 | const ThreadData &td = m_thread_data[tid]; |
| 289 | lldb::ThreadSP thread_sp(new ThreadElfCore(*this, td)); |
| 290 | new_thread_list.AddThread(thread_sp); |
| 291 | } |
| 292 | return new_thread_list.GetSize(false) > 0; |
| 293 | } |
| 294 | |
| 295 | void ProcessElfCore::RefreshStateAfterStop() {} |
| 296 | |
| 297 | Status ProcessElfCore::DoDestroy() { return Status(); } |
| 298 | |
| 299 | // Process Queries |
| 300 | |
| 301 | bool ProcessElfCore::IsAlive() { return true; } |
| 302 | |
| 303 | // Process Memory |
| 304 | size_t ProcessElfCore::ReadMemory(lldb::addr_t addr, void *buf, size_t size, |
| 305 | Status &error) { |
| 306 | if (lldb::ABISP abi_sp = GetABI()) |
| 307 | addr = abi_sp->FixAnyAddress(addr); |
| 308 | |
| 309 | // Don't allow the caching that lldb_private::Process::ReadMemory does since |
| 310 | // in core files we have it all cached our our core file anyway. |
| 311 | return DoReadMemory(addr, buf, size, error); |
| 312 | } |
| 313 | |
| 314 | Status ProcessElfCore::DoGetMemoryRegionInfo(lldb::addr_t load_addr, |
| 315 | MemoryRegionInfo ®ion_info) { |
| 316 | region_info.Clear(); |
| 317 | const VMRangeToPermissions::Entry *permission_entry = |
| 318 | m_core_range_infos.FindEntryThatContainsOrFollows(load_addr); |
| 319 | if (permission_entry) { |
| 320 | if (permission_entry->Contains(load_addr)) { |
| 321 | region_info.GetRange().SetRangeBase(permission_entry->GetRangeBase()); |
| 322 | region_info.GetRange().SetRangeEnd(permission_entry->GetRangeEnd()); |
| 323 | const Flags permissions(permission_entry->data); |
| 324 | region_info.SetReadable(permissions.Test(lldb::ePermissionsReadable) |
| 325 | ? MemoryRegionInfo::eYes |
| 326 | : MemoryRegionInfo::eNo); |
| 327 | region_info.SetWritable(permissions.Test(lldb::ePermissionsWritable) |
| 328 | ? MemoryRegionInfo::eYes |
| 329 | : MemoryRegionInfo::eNo); |
| 330 | region_info.SetExecutable(permissions.Test(lldb::ePermissionsExecutable) |
| 331 | ? MemoryRegionInfo::eYes |
| 332 | : MemoryRegionInfo::eNo); |
| 333 | region_info.SetMapped(MemoryRegionInfo::eYes); |
| 334 | |
| 335 | // A region is memory tagged if there is a memory tag segment that covers |
| 336 | // the exact same range. |
| 337 | region_info.SetMemoryTagged(MemoryRegionInfo::eNo); |
| 338 | const VMRangeToFileOffset::Entry *tag_entry = |
| 339 | m_core_tag_ranges.FindEntryStartsAt(permission_entry->GetRangeBase()); |
| 340 | if (tag_entry && |
| 341 | tag_entry->GetRangeEnd() == permission_entry->GetRangeEnd()) |
| 342 | region_info.SetMemoryTagged(MemoryRegionInfo::eYes); |
| 343 | } else if (load_addr < permission_entry->GetRangeBase()) { |
| 344 | region_info.GetRange().SetRangeBase(load_addr); |
| 345 | region_info.GetRange().SetRangeEnd(permission_entry->GetRangeBase()); |
| 346 | region_info.SetReadable(MemoryRegionInfo::eNo); |
| 347 | region_info.SetWritable(MemoryRegionInfo::eNo); |
| 348 | region_info.SetExecutable(MemoryRegionInfo::eNo); |
| 349 | region_info.SetMapped(MemoryRegionInfo::eNo); |
| 350 | region_info.SetMemoryTagged(MemoryRegionInfo::eNo); |
| 351 | } |
| 352 | return Status(); |
| 353 | } |
| 354 | |
| 355 | region_info.GetRange().SetRangeBase(load_addr); |
| 356 | region_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS(18446744073709551615UL)); |
| 357 | region_info.SetReadable(MemoryRegionInfo::eNo); |
| 358 | region_info.SetWritable(MemoryRegionInfo::eNo); |
| 359 | region_info.SetExecutable(MemoryRegionInfo::eNo); |
| 360 | region_info.SetMapped(MemoryRegionInfo::eNo); |
| 361 | region_info.SetMemoryTagged(MemoryRegionInfo::eNo); |
| 362 | return Status(); |
| 363 | } |
| 364 | |
| 365 | size_t ProcessElfCore::DoReadMemory(lldb::addr_t addr, void *buf, size_t size, |
| 366 | Status &error) { |
| 367 | ObjectFile *core_objfile = m_core_module_sp->GetObjectFile(); |
| 368 | |
| 369 | if (core_objfile == nullptr) |
| 370 | return 0; |
| 371 | |
| 372 | // Get the address range |
| 373 | const VMRangeToFileOffset::Entry *address_range = |
| 374 | m_core_aranges.FindEntryThatContains(addr); |
| 375 | if (address_range == nullptr || address_range->GetRangeEnd() < addr) { |
| 376 | error.SetErrorStringWithFormat("core file does not contain 0x%" PRIx64"l" "x", |
| 377 | addr); |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | // Convert the address into core file offset |
| 382 | const lldb::addr_t offset = addr - address_range->GetRangeBase(); |
| 383 | const lldb::addr_t file_start = address_range->data.GetRangeBase(); |
| 384 | const lldb::addr_t file_end = address_range->data.GetRangeEnd(); |
| 385 | size_t bytes_to_read = size; // Number of bytes to read from the core file |
| 386 | size_t bytes_copied = 0; // Number of bytes actually read from the core file |
| 387 | lldb::addr_t bytes_left = |
| 388 | 0; // Number of bytes available in the core file from the given address |
| 389 | |
| 390 | // Don't proceed if core file doesn't contain the actual data for this |
| 391 | // address range. |
| 392 | if (file_start == file_end) |
| 393 | return 0; |
| 394 | |
| 395 | // Figure out how many on-disk bytes remain in this segment starting at the |
| 396 | // given offset |
| 397 | if (file_end > file_start + offset) |
| 398 | bytes_left = file_end - (file_start + offset); |
| 399 | |
| 400 | if (bytes_to_read > bytes_left) |
| 401 | bytes_to_read = bytes_left; |
| 402 | |
| 403 | // If there is data available on the core file read it |
| 404 | if (bytes_to_read) |
| 405 | bytes_copied = |
| 406 | core_objfile->CopyData(offset + file_start, bytes_to_read, buf); |
| 407 | |
| 408 | return bytes_copied; |
| 409 | } |
| 410 | |
| 411 | llvm::Expected<std::vector<lldb::addr_t>> |
| 412 | ProcessElfCore::ReadMemoryTags(lldb::addr_t addr, size_t len) { |
| 413 | ObjectFile *core_objfile = m_core_module_sp->GetObjectFile(); |
| 414 | if (core_objfile == nullptr) |
| 415 | return llvm::createStringError(llvm::inconvertibleErrorCode(), |
| 416 | "No core object file."); |
| 417 | |
| 418 | llvm::Expected<const MemoryTagManager *> tag_manager_or_err = |
| 419 | GetMemoryTagManager(); |
| 420 | if (!tag_manager_or_err) |
| 421 | return tag_manager_or_err.takeError(); |
| 422 | |
| 423 | // LLDB only supports AArch64 MTE tag segments so we do not need to worry |
| 424 | // about the segment type here. If you got here then you must have a tag |
| 425 | // manager (meaning you are debugging AArch64) and all the segments in this |
| 426 | // list will have had type PT_AARCH64_MEMTAG_MTE. |
| 427 | const VMRangeToFileOffset::Entry *tag_entry = |
| 428 | m_core_tag_ranges.FindEntryThatContains(addr); |
| 429 | // If we don't have a tag segment or the range asked for extends outside the |
| 430 | // segment. |
| 431 | if (!tag_entry || (addr + len) >= tag_entry->GetRangeEnd()) |
| 432 | return llvm::createStringError(llvm::inconvertibleErrorCode(), |
| 433 | "No tag segment that covers this range."); |
| 434 | |
| 435 | const MemoryTagManager *tag_manager = *tag_manager_or_err; |
| 436 | return tag_manager->UnpackTagsFromCoreFileSegment( |
| 437 | [core_objfile](lldb::offset_t offset, size_t length, void *dst) { |
| 438 | return core_objfile->CopyData(offset, length, dst); |
| 439 | }, |
| 440 | tag_entry->GetRangeBase(), tag_entry->data.GetRangeBase(), addr, len); |
| 441 | } |
| 442 | |
| 443 | void ProcessElfCore::Clear() { |
| 444 | m_thread_list.Clear(); |
| 445 | |
| 446 | SetUnixSignals(std::make_shared<UnixSignals>()); |
| 447 | } |
| 448 | |
| 449 | void ProcessElfCore::Initialize() { |
| 450 | static llvm::once_flag g_once_flag; |
| 451 | |
| 452 | llvm::call_once(g_once_flag, []() { |
| 453 | PluginManager::RegisterPlugin(GetPluginNameStatic(), |
| 454 | GetPluginDescriptionStatic(), CreateInstance); |
| 455 | }); |
| 456 | } |
| 457 | |
| 458 | lldb::addr_t ProcessElfCore::GetImageInfoAddress() { |
| 459 | ObjectFile *obj_file = GetTarget().GetExecutableModule()->GetObjectFile(); |
| 460 | Address addr = obj_file->GetImageInfoAddress(&GetTarget()); |
| 461 | |
| 462 | if (addr.IsValid()) |
| 463 | return addr.GetLoadAddress(&GetTarget()); |
| 464 | return LLDB_INVALID_ADDRESS(18446744073709551615UL); |
| 465 | } |
| 466 | |
| 467 | // Parse a FreeBSD NT_PRSTATUS note - see FreeBSD sys/procfs.h for details. |
| 468 | static void ParseFreeBSDPrStatus(ThreadData &thread_data, |
| 469 | const DataExtractor &data, |
| 470 | bool lp64) { |
| 471 | lldb::offset_t offset = 0; |
| 472 | int pr_version = data.GetU32(&offset); |
| 473 | |
| 474 | Log *log = GetLog(LLDBLog::Process); |
| 475 | if (log) { |
| 476 | if (pr_version > 1) |
| 477 | LLDB_LOGF(log, "FreeBSD PRSTATUS unexpected version %d", pr_version)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("FreeBSD PRSTATUS unexpected version %d" , pr_version); } while (0); |
| 478 | } |
| 479 | |
| 480 | // Skip padding, pr_statussz, pr_gregsetsz, pr_fpregsetsz, pr_osreldate |
| 481 | if (lp64) |
| 482 | offset += 32; |
| 483 | else |
| 484 | offset += 16; |
| 485 | |
| 486 | thread_data.signo = data.GetU32(&offset); // pr_cursig |
| 487 | thread_data.tid = data.GetU32(&offset); // pr_pid |
| 488 | if (lp64) |
| 489 | offset += 4; |
| 490 | |
| 491 | size_t len = data.GetByteSize() - offset; |
| 492 | thread_data.gpregset = DataExtractor(data, offset, len); |
| 493 | } |
| 494 | |
| 495 | // Parse a FreeBSD NT_PRPSINFO note - see FreeBSD sys/procfs.h for details. |
| 496 | static void ParseFreeBSDPrPsInfo(ProcessElfCore &process, |
| 497 | const DataExtractor &data, |
| 498 | bool lp64) { |
| 499 | lldb::offset_t offset = 0; |
| 500 | int pr_version = data.GetU32(&offset); |
| 501 | |
| 502 | Log *log = GetLog(LLDBLog::Process); |
| 503 | if (log) { |
| 504 | if (pr_version > 1) |
| 505 | LLDB_LOGF(log, "FreeBSD PRPSINFO unexpected version %d", pr_version)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("FreeBSD PRPSINFO unexpected version %d" , pr_version); } while (0); |
| 506 | } |
| 507 | |
| 508 | // Skip pr_psinfosz, pr_fname, pr_psargs |
| 509 | offset += 108; |
| 510 | if (lp64) |
| 511 | offset += 4; |
| 512 | |
| 513 | process.SetID(data.GetU32(&offset)); // pr_pid |
| 514 | } |
| 515 | |
| 516 | static llvm::Error ParseNetBSDProcInfo(const DataExtractor &data, |
| 517 | uint32_t &cpi_nlwps, |
| 518 | uint32_t &cpi_signo, |
| 519 | uint32_t &cpi_siglwp, |
| 520 | uint32_t &cpi_pid) { |
| 521 | lldb::offset_t offset = 0; |
| 522 | |
| 523 | uint32_t version = data.GetU32(&offset); |
| 524 | if (version != 1) |
| 525 | return llvm::make_error<llvm::StringError>( |
| 526 | "Error parsing NetBSD core(5) notes: Unsupported procinfo version", |
| 527 | llvm::inconvertibleErrorCode()); |
| 528 | |
| 529 | uint32_t cpisize = data.GetU32(&offset); |
| 530 | if (cpisize != NETBSD::NT_PROCINFO_SIZE) |
| 531 | return llvm::make_error<llvm::StringError>( |
| 532 | "Error parsing NetBSD core(5) notes: Unsupported procinfo size", |
| 533 | llvm::inconvertibleErrorCode()); |
| 534 | |
| 535 | cpi_signo = data.GetU32(&offset); /* killing signal */ |
| 536 | |
| 537 | offset += NETBSD::NT_PROCINFO_CPI_SIGCODE_SIZE; |
| 538 | offset += NETBSD::NT_PROCINFO_CPI_SIGPEND_SIZE; |
| 539 | offset += NETBSD::NT_PROCINFO_CPI_SIGMASK_SIZE; |
| 540 | offset += NETBSD::NT_PROCINFO_CPI_SIGIGNORE_SIZE; |
| 541 | offset += NETBSD::NT_PROCINFO_CPI_SIGCATCH_SIZE; |
| 542 | cpi_pid = data.GetU32(&offset); |
| 543 | offset += NETBSD::NT_PROCINFO_CPI_PPID_SIZE; |
| 544 | offset += NETBSD::NT_PROCINFO_CPI_PGRP_SIZE; |
| 545 | offset += NETBSD::NT_PROCINFO_CPI_SID_SIZE; |
| 546 | offset += NETBSD::NT_PROCINFO_CPI_RUID_SIZE; |
| 547 | offset += NETBSD::NT_PROCINFO_CPI_EUID_SIZE; |
| 548 | offset += NETBSD::NT_PROCINFO_CPI_SVUID_SIZE; |
| 549 | offset += NETBSD::NT_PROCINFO_CPI_RGID_SIZE; |
| 550 | offset += NETBSD::NT_PROCINFO_CPI_EGID_SIZE; |
| 551 | offset += NETBSD::NT_PROCINFO_CPI_SVGID_SIZE; |
| 552 | cpi_nlwps = data.GetU32(&offset); /* number of LWPs */ |
| 553 | |
| 554 | offset += NETBSD::NT_PROCINFO_CPI_NAME_SIZE; |
| 555 | cpi_siglwp = data.GetU32(&offset); /* LWP target of killing signal */ |
| 556 | |
| 557 | return llvm::Error::success(); |
| 558 | } |
| 559 | |
| 560 | static void ParseOpenBSDProcInfo(ThreadData &thread_data, |
| 561 | const DataExtractor &data) { |
| 562 | lldb::offset_t offset = 0; |
| 563 | |
| 564 | int version = data.GetU32(&offset); |
| 565 | if (version != 1) |
| 566 | return; |
| 567 | |
| 568 | offset += 4; |
| 569 | thread_data.signo = data.GetU32(&offset); |
| 570 | } |
| 571 | |
| 572 | llvm::Expected<std::vector<CoreNote>> |
| 573 | ProcessElfCore::parseSegment(const DataExtractor &segment) { |
| 574 | lldb::offset_t offset = 0; |
| 575 | std::vector<CoreNote> result; |
| 576 | |
| 577 | while (offset < segment.GetByteSize()) { |
| 578 | ELFNote note = ELFNote(); |
| 579 | if (!note.Parse(segment, &offset)) |
| 580 | return llvm::make_error<llvm::StringError>( |
| 581 | "Unable to parse note segment", llvm::inconvertibleErrorCode()); |
| 582 | |
| 583 | size_t note_start = offset; |
| 584 | size_t note_size = llvm::alignTo(note.n_descsz, 4); |
| 585 | |
| 586 | result.push_back({note, DataExtractor(segment, note_start, note_size)}); |
| 587 | offset += note_size; |
| 588 | } |
| 589 | |
| 590 | return std::move(result); |
| 591 | } |
| 592 | |
| 593 | llvm::Error ProcessElfCore::parseFreeBSDNotes(llvm::ArrayRef<CoreNote> notes) { |
| 594 | ArchSpec arch = GetArchitecture(); |
| 595 | bool lp64 = (arch.GetMachine() == llvm::Triple::aarch64 || |
| 596 | arch.GetMachine() == llvm::Triple::mips64 || |
| 597 | arch.GetMachine() == llvm::Triple::ppc64 || |
| 598 | arch.GetMachine() == llvm::Triple::x86_64); |
| 599 | bool have_prstatus = false; |
| 600 | bool have_prpsinfo = false; |
| 601 | ThreadData thread_data; |
| 602 | for (const auto ¬e : notes) { |
| 603 | if (note.info.n_name != "FreeBSD") |
| 604 | continue; |
| 605 | |
| 606 | if ((note.info.n_type == ELF::NT_PRSTATUS && have_prstatus) || |
| 607 | (note.info.n_type == ELF::NT_PRPSINFO && have_prpsinfo)) { |
| 608 | assert(thread_data.gpregset.GetByteSize() > 0)(static_cast <bool> (thread_data.gpregset.GetByteSize() > 0) ? void (0) : __assert_fail ("thread_data.gpregset.GetByteSize() > 0" , "lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp", 608 , __extension__ __PRETTY_FUNCTION__)); |
| 609 | // Add the new thread to thread list |
| 610 | m_thread_data.push_back(thread_data); |
| 611 | thread_data = ThreadData(); |
| 612 | have_prstatus = false; |
| 613 | have_prpsinfo = false; |
| 614 | } |
| 615 | |
| 616 | switch (note.info.n_type) { |
| 617 | case ELF::NT_PRSTATUS: |
| 618 | have_prstatus = true; |
| 619 | ParseFreeBSDPrStatus(thread_data, note.data, lp64); |
| 620 | break; |
| 621 | case ELF::NT_PRPSINFO: |
| 622 | have_prpsinfo = true; |
| 623 | ParseFreeBSDPrPsInfo(*this, note.data, lp64); |
| 624 | break; |
| 625 | case ELF::NT_FREEBSD_THRMISC: { |
| 626 | lldb::offset_t offset = 0; |
| 627 | thread_data.name = note.data.GetCStr(&offset, 20); |
| 628 | break; |
| 629 | } |
| 630 | case ELF::NT_FREEBSD_PROCSTAT_AUXV: |
| 631 | // FIXME: FreeBSD sticks an int at the beginning of the note |
| 632 | m_auxv = DataExtractor(note.data, 4, note.data.GetByteSize() - 4); |
| 633 | break; |
| 634 | default: |
| 635 | thread_data.notes.push_back(note); |
| 636 | break; |
| 637 | } |
| 638 | } |
| 639 | if (!have_prstatus) { |
| 640 | return llvm::make_error<llvm::StringError>( |
| 641 | "Could not find NT_PRSTATUS note in core file.", |
| 642 | llvm::inconvertibleErrorCode()); |
| 643 | } |
| 644 | m_thread_data.push_back(thread_data); |
| 645 | return llvm::Error::success(); |
| 646 | } |
| 647 | |
| 648 | /// NetBSD specific Thread context from PT_NOTE segment |
| 649 | /// |
| 650 | /// NetBSD ELF core files use notes to provide information about |
| 651 | /// the process's state. The note name is "NetBSD-CORE" for |
| 652 | /// information that is global to the process, and "NetBSD-CORE@nn", |
| 653 | /// where "nn" is the lwpid of the LWP that the information belongs |
| 654 | /// to (such as register state). |
| 655 | /// |
| 656 | /// NetBSD uses the following note identifiers: |
| 657 | /// |
| 658 | /// ELF_NOTE_NETBSD_CORE_PROCINFO (value 1) |
| 659 | /// Note is a "netbsd_elfcore_procinfo" structure. |
| 660 | /// ELF_NOTE_NETBSD_CORE_AUXV (value 2; since NetBSD 8.0) |
| 661 | /// Note is an array of AuxInfo structures. |
| 662 | /// |
| 663 | /// NetBSD also uses ptrace(2) request numbers (the ones that exist in |
| 664 | /// machine-dependent space) to identify register info notes. The |
| 665 | /// info in such notes is in the same format that ptrace(2) would |
| 666 | /// export that information. |
| 667 | /// |
| 668 | /// For more information see /usr/include/sys/exec_elf.h |
| 669 | /// |
| 670 | llvm::Error ProcessElfCore::parseNetBSDNotes(llvm::ArrayRef<CoreNote> notes) { |
| 671 | ThreadData thread_data; |
| 672 | bool had_nt_regs = false; |
| 673 | |
| 674 | // To be extracted from struct netbsd_elfcore_procinfo |
| 675 | // Used to sanity check of the LWPs of the process |
| 676 | uint32_t nlwps = 0; |
| 677 | uint32_t signo = 0; // killing signal |
| 678 | uint32_t siglwp = 0; // LWP target of killing signal |
| 679 | uint32_t pr_pid = 0; |
| 680 | |
| 681 | for (const auto ¬e : notes) { |
| 682 | llvm::StringRef name = note.info.n_name; |
| 683 | |
| 684 | if (name == "NetBSD-CORE") { |
| 685 | if (note.info.n_type == NETBSD::NT_PROCINFO) { |
| 686 | llvm::Error error = ParseNetBSDProcInfo(note.data, nlwps, signo, |
| 687 | siglwp, pr_pid); |
| 688 | if (error) |
| 689 | return error; |
| 690 | SetID(pr_pid); |
| 691 | } else if (note.info.n_type == NETBSD::NT_AUXV) { |
| 692 | m_auxv = note.data; |
| 693 | } |
| 694 | } else if (name.consume_front("NetBSD-CORE@")) { |
| 695 | lldb::tid_t tid; |
| 696 | if (name.getAsInteger(10, tid)) |
| 697 | return llvm::make_error<llvm::StringError>( |
| 698 | "Error parsing NetBSD core(5) notes: Cannot convert LWP ID " |
| 699 | "to integer", |
| 700 | llvm::inconvertibleErrorCode()); |
| 701 | |
| 702 | switch (GetArchitecture().GetMachine()) { |
| 703 | case llvm::Triple::aarch64: { |
| 704 | // Assume order PT_GETREGS, PT_GETFPREGS |
| 705 | if (note.info.n_type == NETBSD::AARCH64::NT_REGS) { |
| 706 | // If this is the next thread, push the previous one first. |
| 707 | if (had_nt_regs) { |
| 708 | m_thread_data.push_back(thread_data); |
| 709 | thread_data = ThreadData(); |
| 710 | had_nt_regs = false; |
Value stored to 'had_nt_regs' is never read | |
| 711 | } |
| 712 | |
| 713 | thread_data.gpregset = note.data; |
| 714 | thread_data.tid = tid; |
| 715 | if (thread_data.gpregset.GetByteSize() == 0) |
| 716 | return llvm::make_error<llvm::StringError>( |
| 717 | "Could not find general purpose registers note in core file.", |
| 718 | llvm::inconvertibleErrorCode()); |
| 719 | had_nt_regs = true; |
| 720 | } else if (note.info.n_type == NETBSD::AARCH64::NT_FPREGS) { |
| 721 | if (!had_nt_regs || tid != thread_data.tid) |
| 722 | return llvm::make_error<llvm::StringError>( |
| 723 | "Error parsing NetBSD core(5) notes: Unexpected order " |
| 724 | "of NOTEs PT_GETFPREG before PT_GETREG", |
| 725 | llvm::inconvertibleErrorCode()); |
| 726 | thread_data.notes.push_back(note); |
| 727 | } |
| 728 | } break; |
| 729 | case llvm::Triple::x86: { |
| 730 | // Assume order PT_GETREGS, PT_GETFPREGS |
| 731 | if (note.info.n_type == NETBSD::I386::NT_REGS) { |
| 732 | // If this is the next thread, push the previous one first. |
| 733 | if (had_nt_regs) { |
| 734 | m_thread_data.push_back(thread_data); |
| 735 | thread_data = ThreadData(); |
| 736 | had_nt_regs = false; |
| 737 | } |
| 738 | |
| 739 | thread_data.gpregset = note.data; |
| 740 | thread_data.tid = tid; |
| 741 | if (thread_data.gpregset.GetByteSize() == 0) |
| 742 | return llvm::make_error<llvm::StringError>( |
| 743 | "Could not find general purpose registers note in core file.", |
| 744 | llvm::inconvertibleErrorCode()); |
| 745 | had_nt_regs = true; |
| 746 | } else if (note.info.n_type == NETBSD::I386::NT_FPREGS) { |
| 747 | if (!had_nt_regs || tid != thread_data.tid) |
| 748 | return llvm::make_error<llvm::StringError>( |
| 749 | "Error parsing NetBSD core(5) notes: Unexpected order " |
| 750 | "of NOTEs PT_GETFPREG before PT_GETREG", |
| 751 | llvm::inconvertibleErrorCode()); |
| 752 | thread_data.notes.push_back(note); |
| 753 | } |
| 754 | } break; |
| 755 | case llvm::Triple::x86_64: { |
| 756 | // Assume order PT_GETREGS, PT_GETFPREGS |
| 757 | if (note.info.n_type == NETBSD::AMD64::NT_REGS) { |
| 758 | // If this is the next thread, push the previous one first. |
| 759 | if (had_nt_regs) { |
| 760 | m_thread_data.push_back(thread_data); |
| 761 | thread_data = ThreadData(); |
| 762 | had_nt_regs = false; |
| 763 | } |
| 764 | |
| 765 | thread_data.gpregset = note.data; |
| 766 | thread_data.tid = tid; |
| 767 | if (thread_data.gpregset.GetByteSize() == 0) |
| 768 | return llvm::make_error<llvm::StringError>( |
| 769 | "Could not find general purpose registers note in core file.", |
| 770 | llvm::inconvertibleErrorCode()); |
| 771 | had_nt_regs = true; |
| 772 | } else if (note.info.n_type == NETBSD::AMD64::NT_FPREGS) { |
| 773 | if (!had_nt_regs || tid != thread_data.tid) |
| 774 | return llvm::make_error<llvm::StringError>( |
| 775 | "Error parsing NetBSD core(5) notes: Unexpected order " |
| 776 | "of NOTEs PT_GETFPREG before PT_GETREG", |
| 777 | llvm::inconvertibleErrorCode()); |
| 778 | thread_data.notes.push_back(note); |
| 779 | } |
| 780 | } break; |
| 781 | default: |
| 782 | break; |
| 783 | } |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | // Push the last thread. |
| 788 | if (had_nt_regs) |
| 789 | m_thread_data.push_back(thread_data); |
| 790 | |
| 791 | if (m_thread_data.empty()) |
| 792 | return llvm::make_error<llvm::StringError>( |
| 793 | "Error parsing NetBSD core(5) notes: No threads information " |
| 794 | "specified in notes", |
| 795 | llvm::inconvertibleErrorCode()); |
| 796 | |
| 797 | if (m_thread_data.size() != nlwps) |
| 798 | return llvm::make_error<llvm::StringError>( |
| 799 | "Error parsing NetBSD core(5) notes: Mismatch between the number " |
| 800 | "of LWPs in netbsd_elfcore_procinfo and the number of LWPs specified " |
| 801 | "by MD notes", |
| 802 | llvm::inconvertibleErrorCode()); |
| 803 | |
| 804 | // Signal targeted at the whole process. |
| 805 | if (siglwp == 0) { |
| 806 | for (auto &data : m_thread_data) |
| 807 | data.signo = signo; |
| 808 | } |
| 809 | // Signal destined for a particular LWP. |
| 810 | else { |
| 811 | bool passed = false; |
| 812 | |
| 813 | for (auto &data : m_thread_data) { |
| 814 | if (data.tid == siglwp) { |
| 815 | data.signo = signo; |
| 816 | passed = true; |
| 817 | break; |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | if (!passed) |
| 822 | return llvm::make_error<llvm::StringError>( |
| 823 | "Error parsing NetBSD core(5) notes: Signal passed to unknown LWP", |
| 824 | llvm::inconvertibleErrorCode()); |
| 825 | } |
| 826 | |
| 827 | return llvm::Error::success(); |
| 828 | } |
| 829 | |
| 830 | llvm::Error ProcessElfCore::parseOpenBSDNotes(llvm::ArrayRef<CoreNote> notes) { |
| 831 | ThreadData thread_data = {}; |
| 832 | for (const auto ¬e : notes) { |
| 833 | // OpenBSD per-thread information is stored in notes named "OpenBSD@nnn" so |
| 834 | // match on the initial part of the string. |
| 835 | if (!llvm::StringRef(note.info.n_name).startswith("OpenBSD")) |
| 836 | continue; |
| 837 | |
| 838 | switch (note.info.n_type) { |
| 839 | case OPENBSD::NT_PROCINFO: |
| 840 | ParseOpenBSDProcInfo(thread_data, note.data); |
| 841 | break; |
| 842 | case OPENBSD::NT_AUXV: |
| 843 | m_auxv = note.data; |
| 844 | break; |
| 845 | case OPENBSD::NT_REGS: |
| 846 | thread_data.gpregset = note.data; |
| 847 | break; |
| 848 | default: |
| 849 | thread_data.notes.push_back(note); |
| 850 | break; |
| 851 | } |
| 852 | } |
| 853 | if (thread_data.gpregset.GetByteSize() == 0) { |
| 854 | return llvm::make_error<llvm::StringError>( |
| 855 | "Could not find general purpose registers note in core file.", |
| 856 | llvm::inconvertibleErrorCode()); |
| 857 | } |
| 858 | m_thread_data.push_back(thread_data); |
| 859 | return llvm::Error::success(); |
| 860 | } |
| 861 | |
| 862 | /// A description of a linux process usually contains the following NOTE |
| 863 | /// entries: |
| 864 | /// - NT_PRPSINFO - General process information like pid, uid, name, ... |
| 865 | /// - NT_SIGINFO - Information about the signal that terminated the process |
| 866 | /// - NT_AUXV - Process auxiliary vector |
| 867 | /// - NT_FILE - Files mapped into memory |
| 868 | /// |
| 869 | /// Additionally, for each thread in the process the core file will contain at |
| 870 | /// least the NT_PRSTATUS note, containing the thread id and general purpose |
| 871 | /// registers. It may include additional notes for other register sets (floating |
| 872 | /// point and vector registers, ...). The tricky part here is that some of these |
| 873 | /// notes have "CORE" in their owner fields, while other set it to "LINUX". |
| 874 | llvm::Error ProcessElfCore::parseLinuxNotes(llvm::ArrayRef<CoreNote> notes) { |
| 875 | const ArchSpec &arch = GetArchitecture(); |
| 876 | bool have_prstatus = false; |
| 877 | bool have_prpsinfo = false; |
| 878 | ThreadData thread_data; |
| 879 | for (const auto ¬e : notes) { |
| 880 | if (note.info.n_name != "CORE" && note.info.n_name != "LINUX") |
| 881 | continue; |
| 882 | |
| 883 | if ((note.info.n_type == ELF::NT_PRSTATUS && have_prstatus) || |
| 884 | (note.info.n_type == ELF::NT_PRPSINFO && have_prpsinfo)) { |
| 885 | assert(thread_data.gpregset.GetByteSize() > 0)(static_cast <bool> (thread_data.gpregset.GetByteSize() > 0) ? void (0) : __assert_fail ("thread_data.gpregset.GetByteSize() > 0" , "lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp", 885 , __extension__ __PRETTY_FUNCTION__)); |
| 886 | // Add the new thread to thread list |
| 887 | m_thread_data.push_back(thread_data); |
| 888 | thread_data = ThreadData(); |
| 889 | have_prstatus = false; |
| 890 | have_prpsinfo = false; |
| 891 | } |
| 892 | |
| 893 | switch (note.info.n_type) { |
| 894 | case ELF::NT_PRSTATUS: { |
| 895 | have_prstatus = true; |
| 896 | ELFLinuxPrStatus prstatus; |
| 897 | Status status = prstatus.Parse(note.data, arch); |
| 898 | if (status.Fail()) |
| 899 | return status.ToError(); |
| 900 | thread_data.prstatus_sig = prstatus.pr_cursig; |
| 901 | thread_data.tid = prstatus.pr_pid; |
| 902 | uint32_t header_size = ELFLinuxPrStatus::GetSize(arch); |
| 903 | size_t len = note.data.GetByteSize() - header_size; |
| 904 | thread_data.gpregset = DataExtractor(note.data, header_size, len); |
| 905 | break; |
| 906 | } |
| 907 | case ELF::NT_PRPSINFO: { |
| 908 | have_prpsinfo = true; |
| 909 | ELFLinuxPrPsInfo prpsinfo; |
| 910 | Status status = prpsinfo.Parse(note.data, arch); |
| 911 | if (status.Fail()) |
| 912 | return status.ToError(); |
| 913 | thread_data.name.assign (prpsinfo.pr_fname, strnlen (prpsinfo.pr_fname, sizeof (prpsinfo.pr_fname))); |
| 914 | SetID(prpsinfo.pr_pid); |
| 915 | break; |
| 916 | } |
| 917 | case ELF::NT_SIGINFO: { |
| 918 | ELFLinuxSigInfo siginfo; |
| 919 | Status status = siginfo.Parse(note.data, arch); |
| 920 | if (status.Fail()) |
| 921 | return status.ToError(); |
| 922 | thread_data.signo = siginfo.si_signo; |
| 923 | thread_data.code = siginfo.si_code; |
| 924 | break; |
| 925 | } |
| 926 | case ELF::NT_FILE: { |
| 927 | m_nt_file_entries.clear(); |
| 928 | lldb::offset_t offset = 0; |
| 929 | const uint64_t count = note.data.GetAddress(&offset); |
| 930 | note.data.GetAddress(&offset); // Skip page size |
| 931 | for (uint64_t i = 0; i < count; ++i) { |
| 932 | NT_FILE_Entry entry; |
| 933 | entry.start = note.data.GetAddress(&offset); |
| 934 | entry.end = note.data.GetAddress(&offset); |
| 935 | entry.file_ofs = note.data.GetAddress(&offset); |
| 936 | m_nt_file_entries.push_back(entry); |
| 937 | } |
| 938 | for (uint64_t i = 0; i < count; ++i) { |
| 939 | const char *path = note.data.GetCStr(&offset); |
| 940 | if (path && path[0]) |
| 941 | m_nt_file_entries[i].path.SetCString(path); |
| 942 | } |
| 943 | break; |
| 944 | } |
| 945 | case ELF::NT_AUXV: |
| 946 | m_auxv = note.data; |
| 947 | break; |
| 948 | default: |
| 949 | thread_data.notes.push_back(note); |
| 950 | break; |
| 951 | } |
| 952 | } |
| 953 | // Add last entry in the note section |
| 954 | if (have_prstatus) |
| 955 | m_thread_data.push_back(thread_data); |
| 956 | return llvm::Error::success(); |
| 957 | } |
| 958 | |
| 959 | /// Parse Thread context from PT_NOTE segment and store it in the thread list |
| 960 | /// A note segment consists of one or more NOTE entries, but their types and |
| 961 | /// meaning differ depending on the OS. |
| 962 | llvm::Error ProcessElfCore::ParseThreadContextsFromNoteSegment( |
| 963 | const elf::ELFProgramHeader &segment_header, |
| 964 | const DataExtractor &segment_data) { |
| 965 | assert(segment_header.p_type == llvm::ELF::PT_NOTE)(static_cast <bool> (segment_header.p_type == llvm::ELF ::PT_NOTE) ? void (0) : __assert_fail ("segment_header.p_type == llvm::ELF::PT_NOTE" , "lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp", 965 , __extension__ __PRETTY_FUNCTION__)); |
| 966 | |
| 967 | auto notes_or_error = parseSegment(segment_data); |
| 968 | if(!notes_or_error) |
| 969 | return notes_or_error.takeError(); |
| 970 | switch (GetArchitecture().GetTriple().getOS()) { |
| 971 | case llvm::Triple::FreeBSD: |
| 972 | return parseFreeBSDNotes(*notes_or_error); |
| 973 | case llvm::Triple::Linux: |
| 974 | return parseLinuxNotes(*notes_or_error); |
| 975 | case llvm::Triple::NetBSD: |
| 976 | return parseNetBSDNotes(*notes_or_error); |
| 977 | case llvm::Triple::OpenBSD: |
| 978 | return parseOpenBSDNotes(*notes_or_error); |
| 979 | default: |
| 980 | return llvm::make_error<llvm::StringError>( |
| 981 | "Don't know how to parse core file. Unsupported OS.", |
| 982 | llvm::inconvertibleErrorCode()); |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | uint32_t ProcessElfCore::GetNumThreadContexts() { |
| 987 | if (!m_thread_data_valid) |
| 988 | DoLoadCore(); |
| 989 | return m_thread_data.size(); |
| 990 | } |
| 991 | |
| 992 | ArchSpec ProcessElfCore::GetArchitecture() { |
| 993 | ArchSpec arch = m_core_module_sp->GetObjectFile()->GetArchitecture(); |
| 994 | |
| 995 | ArchSpec target_arch = GetTarget().GetArchitecture(); |
| 996 | arch.MergeFrom(target_arch); |
| 997 | |
| 998 | // On MIPS there is no way to differentiate betwenn 32bit and 64bit core |
| 999 | // files and this information can't be merged in from the target arch so we |
| 1000 | // fail back to unconditionally returning the target arch in this config. |
| 1001 | if (target_arch.IsMIPS()) { |
| 1002 | return target_arch; |
| 1003 | } |
| 1004 | |
| 1005 | return arch; |
| 1006 | } |
| 1007 | |
| 1008 | DataExtractor ProcessElfCore::GetAuxvData() { |
| 1009 | const uint8_t *start = m_auxv.GetDataStart(); |
| 1010 | size_t len = m_auxv.GetByteSize(); |
| 1011 | lldb::DataBufferSP buffer(new lldb_private::DataBufferHeap(start, len)); |
| 1012 | return DataExtractor(buffer, GetByteOrder(), GetAddressByteSize()); |
| 1013 | } |
| 1014 | |
| 1015 | bool ProcessElfCore::GetProcessInfo(ProcessInstanceInfo &info) { |
| 1016 | info.Clear(); |
| 1017 | info.SetProcessID(GetID()); |
| 1018 | info.SetArchitecture(GetArchitecture()); |
| 1019 | lldb::ModuleSP module_sp = GetTarget().GetExecutableModule(); |
| 1020 | if (module_sp) { |
| 1021 | const bool add_exe_file_as_first_arg = false; |
| 1022 | info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(), |
| 1023 | add_exe_file_as_first_arg); |
| 1024 | } |
| 1025 | return true; |
| 1026 | } |