Zachary Turner | 307f5ae | 2018-10-12 19:47:13 +0000 | [diff] [blame^] | 1 | //===-- SymbolFileNativePDB.cpp ---------------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "SymbolFileNativePDB.h" |
| 11 | |
| 12 | #include "clang/Lex/Lexer.h" |
| 13 | |
| 14 | #include "lldb/Core/Module.h" |
| 15 | #include "lldb/Core/PluginManager.h" |
| 16 | #include "lldb/Symbol/CompileUnit.h" |
| 17 | #include "lldb/Symbol/LineTable.h" |
| 18 | #include "lldb/Symbol/ObjectFile.h" |
| 19 | #include "lldb/Symbol/SymbolContext.h" |
| 20 | #include "lldb/Symbol/SymbolVendor.h" |
| 21 | |
| 22 | #include "llvm/DebugInfo/CodeView/CVRecord.h" |
| 23 | #include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h" |
| 24 | #include "llvm/DebugInfo/CodeView/RecordName.h" |
| 25 | #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h" |
| 26 | #include "llvm/DebugInfo/PDB/Native/DbiStream.h" |
| 27 | #include "llvm/DebugInfo/PDB/Native/GlobalsStream.h" |
| 28 | #include "llvm/DebugInfo/PDB/Native/InfoStream.h" |
| 29 | #include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h" |
| 30 | #include "llvm/DebugInfo/PDB/Native/PDBFile.h" |
| 31 | #include "llvm/DebugInfo/PDB/Native/SymbolStream.h" |
| 32 | #include "llvm/DebugInfo/PDB/PDBTypes.h" |
| 33 | #include "llvm/Object/COFF.h" |
| 34 | #include "llvm/Support/Allocator.h" |
| 35 | #include "llvm/Support/BinaryStreamReader.h" |
| 36 | #include "llvm/Support/ErrorOr.h" |
| 37 | #include "llvm/Support/MemoryBuffer.h" |
| 38 | |
| 39 | #include "PdbSymUid.h" |
| 40 | #include "PdbUtil.h" |
| 41 | |
| 42 | using namespace lldb; |
| 43 | using namespace lldb_private; |
| 44 | using namespace lldb_private::npdb; |
| 45 | using namespace llvm::codeview; |
| 46 | using namespace llvm::pdb; |
| 47 | |
| 48 | static lldb::LanguageType TranslateLanguage(PDB_Lang lang) { |
| 49 | switch (lang) { |
| 50 | case PDB_Lang::Cpp: |
| 51 | return lldb::LanguageType::eLanguageTypeC_plus_plus; |
| 52 | case PDB_Lang::C: |
| 53 | return lldb::LanguageType::eLanguageTypeC; |
| 54 | default: |
| 55 | return lldb::LanguageType::eLanguageTypeUnknown; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | static std::unique_ptr<PDBFile> loadPDBFile(std::string PdbPath, |
| 60 | llvm::BumpPtrAllocator &Allocator) { |
| 61 | llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ErrorOrBuffer = |
| 62 | llvm::MemoryBuffer::getFile(PdbPath, /*FileSize=*/-1, |
| 63 | /*RequiresNullTerminator=*/false); |
| 64 | if (!ErrorOrBuffer) |
| 65 | return nullptr; |
| 66 | std::unique_ptr<llvm::MemoryBuffer> Buffer = std::move(*ErrorOrBuffer); |
| 67 | |
| 68 | llvm::StringRef Path = Buffer->getBufferIdentifier(); |
| 69 | auto Stream = llvm::make_unique<llvm::MemoryBufferByteStream>( |
| 70 | std::move(Buffer), llvm::support::little); |
| 71 | |
| 72 | auto File = llvm::make_unique<PDBFile>(Path, std::move(Stream), Allocator); |
| 73 | if (auto EC = File->parseFileHeaders()) |
| 74 | return nullptr; |
| 75 | if (auto EC = File->parseStreamData()) |
| 76 | return nullptr; |
| 77 | |
| 78 | return File; |
| 79 | } |
| 80 | |
| 81 | static std::unique_ptr<PDBFile> |
| 82 | loadMatchingPDBFile(std::string exe_path, llvm::BumpPtrAllocator &allocator) { |
| 83 | // Try to find a matching PDB for an EXE. |
| 84 | using namespace llvm::object; |
| 85 | auto expected_binary = createBinary(exe_path); |
| 86 | |
| 87 | // If the file isn't a PE/COFF executable, fail. |
| 88 | if (!expected_binary) { |
| 89 | llvm::consumeError(expected_binary.takeError()); |
| 90 | return nullptr; |
| 91 | } |
| 92 | OwningBinary<Binary> binary = std::move(*expected_binary); |
| 93 | |
| 94 | auto *obj = llvm::dyn_cast<llvm::object::COFFObjectFile>(binary.getBinary()); |
| 95 | if (!obj) |
| 96 | return nullptr; |
| 97 | const llvm::codeview::DebugInfo *pdb_info = nullptr; |
| 98 | |
| 99 | // If it doesn't have a debug directory, fail. |
| 100 | llvm::StringRef pdb_file; |
| 101 | auto ec = obj->getDebugPDBInfo(pdb_info, pdb_file); |
| 102 | if (ec) |
| 103 | return nullptr; |
| 104 | |
| 105 | // if the file doesn't exist, is not a pdb, or doesn't have a matching guid, |
| 106 | // fail. |
| 107 | llvm::file_magic magic; |
| 108 | ec = llvm::identify_magic(pdb_file, magic); |
| 109 | if (ec || magic != llvm::file_magic::pdb) |
| 110 | return nullptr; |
| 111 | std::unique_ptr<PDBFile> pdb = loadPDBFile(pdb_file, allocator); |
| 112 | auto expected_info = pdb->getPDBInfoStream(); |
| 113 | if (!expected_info) { |
| 114 | llvm::consumeError(expected_info.takeError()); |
| 115 | return nullptr; |
| 116 | } |
| 117 | llvm::codeview::GUID guid; |
| 118 | memcpy(&guid, pdb_info->PDB70.Signature, 16); |
| 119 | |
| 120 | if (expected_info->getGuid() != guid) |
| 121 | return nullptr; |
| 122 | return pdb; |
| 123 | } |
| 124 | |
| 125 | static bool IsFunctionPrologue(const CompilandIndexItem &cci, |
| 126 | lldb::addr_t addr) { |
| 127 | // FIXME: Implement this. |
| 128 | return false; |
| 129 | } |
| 130 | |
| 131 | static bool IsFunctionEpilogue(const CompilandIndexItem &cci, |
| 132 | lldb::addr_t addr) { |
| 133 | // FIXME: Implement this. |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | void SymbolFileNativePDB::Initialize() { |
| 138 | PluginManager::RegisterPlugin(GetPluginNameStatic(), |
| 139 | GetPluginDescriptionStatic(), CreateInstance, |
| 140 | DebuggerInitialize); |
| 141 | } |
| 142 | |
| 143 | void SymbolFileNativePDB::Terminate() { |
| 144 | PluginManager::UnregisterPlugin(CreateInstance); |
| 145 | } |
| 146 | |
| 147 | void SymbolFileNativePDB::DebuggerInitialize(lldb_private::Debugger &debugger) { |
| 148 | } |
| 149 | |
| 150 | lldb_private::ConstString SymbolFileNativePDB::GetPluginNameStatic() { |
| 151 | static ConstString g_name("native-pdb"); |
| 152 | return g_name; |
| 153 | } |
| 154 | |
| 155 | const char *SymbolFileNativePDB::GetPluginDescriptionStatic() { |
| 156 | return "Microsoft PDB debug symbol cross-platform file reader."; |
| 157 | } |
| 158 | |
| 159 | lldb_private::SymbolFile * |
| 160 | SymbolFileNativePDB::CreateInstance(lldb_private::ObjectFile *obj_file) { |
| 161 | return new SymbolFileNativePDB(obj_file); |
| 162 | } |
| 163 | |
| 164 | SymbolFileNativePDB::SymbolFileNativePDB(lldb_private::ObjectFile *object_file) |
| 165 | : SymbolFile(object_file) {} |
| 166 | |
| 167 | SymbolFileNativePDB::~SymbolFileNativePDB() {} |
| 168 | |
| 169 | uint32_t SymbolFileNativePDB::CalculateAbilities() { |
| 170 | uint32_t abilities = 0; |
| 171 | if (!m_obj_file) |
| 172 | return 0; |
| 173 | |
| 174 | if (!m_index) { |
| 175 | // Lazily load and match the PDB file, but only do this once. |
| 176 | std::unique_ptr<PDBFile> file_up = |
| 177 | loadMatchingPDBFile(m_obj_file->GetFileSpec().GetPath(), m_allocator); |
| 178 | |
| 179 | if (!file_up) { |
| 180 | auto module_sp = m_obj_file->GetModule(); |
| 181 | if (!module_sp) |
| 182 | return 0; |
| 183 | // See if any symbol file is specified through `--symfile` option. |
| 184 | FileSpec symfile = module_sp->GetSymbolFileFileSpec(); |
| 185 | if (!symfile) |
| 186 | return 0; |
| 187 | file_up = loadPDBFile(symfile.GetPath(), m_allocator); |
| 188 | } |
| 189 | |
| 190 | if (!file_up) |
| 191 | return 0; |
| 192 | |
| 193 | auto expected_index = PdbIndex::create(std::move(file_up)); |
| 194 | if (!expected_index) { |
| 195 | llvm::consumeError(expected_index.takeError()); |
| 196 | return 0; |
| 197 | } |
| 198 | m_index = std::move(*expected_index); |
| 199 | } |
| 200 | if (!m_index) |
| 201 | return 0; |
| 202 | |
| 203 | // We don't especially have to be precise here. We only distinguish between |
| 204 | // stripped and not stripped. |
| 205 | abilities = kAllAbilities; |
| 206 | |
| 207 | if (m_index->dbi().isStripped()) |
| 208 | abilities &= ~(Blocks | LocalVariables); |
| 209 | return abilities; |
| 210 | } |
| 211 | |
| 212 | void SymbolFileNativePDB::InitializeObject() { |
| 213 | m_obj_load_address = m_obj_file->GetFileOffset(); |
| 214 | m_index->SetLoadAddress(m_obj_load_address); |
| 215 | m_index->ParseSectionContribs(); |
| 216 | } |
| 217 | |
| 218 | uint32_t SymbolFileNativePDB::GetNumCompileUnits() { |
| 219 | const DbiModuleList &modules = m_index->dbi().modules(); |
| 220 | uint32_t count = modules.getModuleCount(); |
| 221 | if (count == 0) |
| 222 | return count; |
| 223 | |
| 224 | // The linker can inject an additional "dummy" compilation unit into the |
| 225 | // PDB. Ignore this special compile unit for our purposes, if it is there. |
| 226 | // It is always the last one. |
| 227 | DbiModuleDescriptor last = modules.getModuleDescriptor(count - 1); |
| 228 | if (last.getModuleName() == "* Linker *") |
| 229 | --count; |
| 230 | return count; |
| 231 | } |
| 232 | |
| 233 | lldb::FunctionSP SymbolFileNativePDB::CreateFunction(PdbSymUid func_uid, |
| 234 | const SymbolContext &sc) { |
| 235 | lldbassert(func_uid.tag() == PDB_SymType::Function); |
| 236 | |
| 237 | PdbSymUid cuid = PdbSymUid::makeCompilandId(func_uid.asCuSym().modi); |
| 238 | |
| 239 | const CompilandIndexItem *cci = m_index->compilands().GetCompiland(cuid); |
| 240 | lldbassert(cci); |
| 241 | CVSymbol sym_record = |
| 242 | cci->m_debug_stream.readSymbolAtOffset(func_uid.asCuSym().offset); |
| 243 | |
| 244 | lldbassert(sym_record.kind() == S_LPROC32 || sym_record.kind() == S_GPROC32); |
| 245 | SegmentOffsetLength sol = GetSegmentOffsetAndLength(sym_record); |
| 246 | |
| 247 | auto file_vm_addr = m_index->MakeVirtualAddress(sol.so); |
| 248 | if (file_vm_addr == LLDB_INVALID_ADDRESS || file_vm_addr == 0) |
| 249 | return nullptr; |
| 250 | |
| 251 | AddressRange func_range(file_vm_addr, sol.length, |
| 252 | sc.module_sp->GetSectionList()); |
| 253 | if (!func_range.GetBaseAddress().IsValid()) |
| 254 | return nullptr; |
| 255 | |
| 256 | lldb_private::Type *func_type = nullptr; |
| 257 | |
| 258 | // FIXME: Resolve types and mangled names. |
| 259 | PdbSymUid sig_uid = |
| 260 | PdbSymUid::makeTypeSymId(PDB_SymType::FunctionSig, TypeIndex{0}, false); |
| 261 | Mangled mangled(getSymbolName(sym_record)); |
| 262 | |
| 263 | FunctionSP func_sp = std::make_shared<Function>( |
| 264 | sc.comp_unit, func_uid.toOpaqueId(), sig_uid.toOpaqueId(), mangled, |
| 265 | func_type, func_range); |
| 266 | |
| 267 | sc.comp_unit->AddFunction(func_sp); |
| 268 | return func_sp; |
| 269 | } |
| 270 | |
| 271 | CompUnitSP |
| 272 | SymbolFileNativePDB::CreateCompileUnit(const CompilandIndexItem &cci) { |
| 273 | lldb::LanguageType lang = |
| 274 | cci.m_compile_opts ? TranslateLanguage(cci.m_compile_opts->getLanguage()) |
| 275 | : lldb::eLanguageTypeUnknown; |
| 276 | |
| 277 | LazyBool optimized = eLazyBoolNo; |
| 278 | if (cci.m_compile_opts && cci.m_compile_opts->hasOptimizations()) |
| 279 | optimized = eLazyBoolYes; |
| 280 | |
| 281 | llvm::StringRef source_file_name = |
| 282 | m_index->compilands().GetMainSourceFile(cci); |
| 283 | lldb_private::FileSpec fs(source_file_name, false); |
| 284 | |
| 285 | CompUnitSP cu_sp = |
| 286 | std::make_shared<CompileUnit>(m_obj_file->GetModule(), nullptr, fs, |
| 287 | cci.m_uid.toOpaqueId(), lang, optimized); |
| 288 | |
| 289 | const PdbCompilandId &cuid = cci.m_uid.asCompiland(); |
| 290 | m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cuid.modi, |
| 291 | cu_sp); |
| 292 | return cu_sp; |
| 293 | } |
| 294 | |
| 295 | FunctionSP SymbolFileNativePDB::GetOrCreateFunction(PdbSymUid func_uid, |
| 296 | const SymbolContext &sc) { |
| 297 | lldbassert(func_uid.tag() == PDB_SymType::Function); |
| 298 | auto emplace_result = m_functions.try_emplace(func_uid.toOpaqueId(), nullptr); |
| 299 | if (emplace_result.second) |
| 300 | emplace_result.first->second = CreateFunction(func_uid, sc); |
| 301 | |
| 302 | lldbassert(emplace_result.first->second); |
| 303 | return emplace_result.first->second; |
| 304 | } |
| 305 | |
| 306 | CompUnitSP |
| 307 | SymbolFileNativePDB::GetOrCreateCompileUnit(const CompilandIndexItem &cci) { |
| 308 | auto emplace_result = |
| 309 | m_compilands.try_emplace(cci.m_uid.toOpaqueId(), nullptr); |
| 310 | if (emplace_result.second) |
| 311 | emplace_result.first->second = CreateCompileUnit(cci); |
| 312 | |
| 313 | lldbassert(emplace_result.first->second); |
| 314 | return emplace_result.first->second; |
| 315 | } |
| 316 | |
| 317 | lldb::CompUnitSP SymbolFileNativePDB::ParseCompileUnitAtIndex(uint32_t index) { |
| 318 | if (index >= GetNumCompileUnits()) |
| 319 | return CompUnitSP(); |
| 320 | lldbassert(index < UINT16_MAX); |
| 321 | if (index >= UINT16_MAX) |
| 322 | return nullptr; |
| 323 | |
| 324 | CompilandIndexItem &item = m_index->compilands().GetOrCreateCompiland(index); |
| 325 | |
| 326 | return GetOrCreateCompileUnit(item); |
| 327 | } |
| 328 | |
| 329 | lldb::LanguageType SymbolFileNativePDB::ParseCompileUnitLanguage( |
| 330 | const lldb_private::SymbolContext &sc) { |
| 331 | // What fields should I expect to be filled out on the SymbolContext? Is it |
| 332 | // safe to assume that `sc.comp_unit` is valid? |
| 333 | if (!sc.comp_unit) |
| 334 | return lldb::eLanguageTypeUnknown; |
| 335 | PdbSymUid uid = PdbSymUid::fromOpaqueId(sc.comp_unit->GetID()); |
| 336 | lldbassert(uid.tag() == PDB_SymType::Compiland); |
| 337 | |
| 338 | CompilandIndexItem *item = m_index->compilands().GetCompiland(uid); |
| 339 | lldbassert(item); |
| 340 | if (!item->m_compile_opts) |
| 341 | return lldb::eLanguageTypeUnknown; |
| 342 | |
| 343 | return TranslateLanguage(item->m_compile_opts->getLanguage()); |
| 344 | } |
| 345 | |
| 346 | size_t SymbolFileNativePDB::ParseCompileUnitFunctions( |
| 347 | const lldb_private::SymbolContext &sc) { |
| 348 | lldbassert(sc.comp_unit); |
| 349 | return false; |
| 350 | } |
| 351 | |
| 352 | static bool NeedsResolvedCompileUnit(uint32_t resolve_scope) { |
| 353 | // If any of these flags are set, we need to resolve the compile unit. |
| 354 | uint32_t flags = eSymbolContextCompUnit; |
| 355 | flags |= eSymbolContextVariable; |
| 356 | flags |= eSymbolContextFunction; |
| 357 | flags |= eSymbolContextBlock; |
| 358 | flags |= eSymbolContextLineEntry; |
| 359 | return (resolve_scope & flags) != 0; |
| 360 | } |
| 361 | |
| 362 | uint32_t |
| 363 | SymbolFileNativePDB::ResolveSymbolContext(const lldb_private::Address &addr, |
| 364 | uint32_t resolve_scope, |
| 365 | lldb_private::SymbolContext &sc) { |
| 366 | uint32_t resolved_flags = 0; |
| 367 | lldb::addr_t file_addr = addr.GetFileAddress(); |
| 368 | |
| 369 | if (NeedsResolvedCompileUnit(resolve_scope)) { |
| 370 | llvm::Optional<uint16_t> modi = m_index->GetModuleIndexForVa(file_addr); |
| 371 | if (!modi) |
| 372 | return 0; |
| 373 | PdbSymUid cuid = PdbSymUid::makeCompilandId(*modi); |
| 374 | CompilandIndexItem *cci = m_index->compilands().GetCompiland(cuid); |
| 375 | if (!cci) |
| 376 | return 0; |
| 377 | |
| 378 | sc.comp_unit = GetOrCreateCompileUnit(*cci).get(); |
| 379 | resolved_flags |= eSymbolContextCompUnit; |
| 380 | } |
| 381 | |
| 382 | if (resolve_scope & eSymbolContextFunction) { |
| 383 | lldbassert(sc.comp_unit); |
| 384 | std::vector<SymbolAndUid> matches = m_index->FindSymbolsByVa(file_addr); |
| 385 | for (const auto &match : matches) { |
| 386 | if (match.uid.tag() != PDB_SymType::Function) |
| 387 | continue; |
| 388 | sc.function = GetOrCreateFunction(match.uid, sc).get(); |
| 389 | } |
| 390 | resolved_flags |= eSymbolContextFunction; |
| 391 | } |
| 392 | |
| 393 | if (resolve_scope & eSymbolContextLineEntry) { |
| 394 | lldbassert(sc.comp_unit); |
| 395 | if (auto *line_table = sc.comp_unit->GetLineTable()) { |
| 396 | if (line_table->FindLineEntryByAddress(addr, sc.line_entry)) |
| 397 | resolved_flags |= eSymbolContextLineEntry; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | return resolved_flags; |
| 402 | } |
| 403 | |
| 404 | static void AppendLineEntryToSequence(LineTable &table, LineSequence &sequence, |
| 405 | const CompilandIndexItem &cci, |
| 406 | lldb::addr_t base_addr, |
| 407 | uint32_t file_number, |
| 408 | const LineFragmentHeader &block, |
| 409 | const LineNumberEntry &cur) { |
| 410 | LineInfo cur_info(cur.Flags); |
| 411 | |
| 412 | if (cur_info.isAlwaysStepInto() || cur_info.isNeverStepInto()) |
| 413 | return; |
| 414 | |
| 415 | uint64_t addr = base_addr + cur.Offset; |
| 416 | |
| 417 | bool is_statement = cur_info.isStatement(); |
| 418 | bool is_prologue = IsFunctionPrologue(cci, addr); |
| 419 | bool is_epilogue = IsFunctionEpilogue(cci, addr); |
| 420 | |
| 421 | uint32_t lno = cur_info.getStartLine(); |
| 422 | |
| 423 | table.AppendLineEntryToSequence(&sequence, addr, lno, 0, file_number, |
| 424 | is_statement, false, is_prologue, is_epilogue, |
| 425 | false); |
| 426 | } |
| 427 | |
| 428 | static void TerminateLineSequence(LineTable &table, |
| 429 | const LineFragmentHeader &block, |
| 430 | lldb::addr_t base_addr, uint32_t file_number, |
| 431 | uint32_t last_line, |
| 432 | std::unique_ptr<LineSequence> seq) { |
| 433 | // The end is always a terminal entry, so insert it regardless. |
| 434 | table.AppendLineEntryToSequence(seq.get(), base_addr + block.CodeSize, |
| 435 | last_line, 0, file_number, false, false, |
| 436 | false, false, true); |
| 437 | table.InsertSequence(seq.release()); |
| 438 | } |
| 439 | |
| 440 | bool SymbolFileNativePDB::ParseCompileUnitLineTable( |
| 441 | const lldb_private::SymbolContext &sc) { |
| 442 | // Unfortunately LLDB is set up to parse the entire compile unit line table |
| 443 | // all at once, even if all it really needs is line info for a specific |
| 444 | // function. In the future it would be nice if it could set the sc.m_function |
| 445 | // member, and we could only get the line info for the function in question. |
| 446 | lldbassert(sc.comp_unit); |
| 447 | PdbSymUid cu_id = PdbSymUid::fromOpaqueId(sc.comp_unit->GetID()); |
| 448 | lldbassert(cu_id.isCompiland()); |
| 449 | CompilandIndexItem *cci = m_index->compilands().GetCompiland(cu_id); |
| 450 | lldbassert(cci); |
| 451 | auto line_table = llvm::make_unique<LineTable>(sc.comp_unit); |
| 452 | |
| 453 | // This is basically a copy of the .debug$S subsections from all original COFF |
| 454 | // object files merged together with address relocations applied. We are |
| 455 | // looking for all DEBUG_S_LINES subsections. |
| 456 | for (const DebugSubsectionRecord &dssr : |
| 457 | cci->m_debug_stream.getSubsectionsArray()) { |
| 458 | if (dssr.kind() != DebugSubsectionKind::Lines) |
| 459 | continue; |
| 460 | |
| 461 | DebugLinesSubsectionRef lines; |
| 462 | llvm::BinaryStreamReader reader(dssr.getRecordData()); |
| 463 | if (auto EC = lines.initialize(reader)) { |
| 464 | llvm::consumeError(std::move(EC)); |
| 465 | return false; |
| 466 | } |
| 467 | |
| 468 | const LineFragmentHeader *lfh = lines.header(); |
| 469 | uint64_t virtual_addr = |
| 470 | m_index->MakeVirtualAddress(lfh->RelocSegment, lfh->RelocOffset); |
| 471 | |
| 472 | const auto &checksums = cci->m_strings.checksums().getArray(); |
| 473 | const auto &strings = cci->m_strings.strings(); |
| 474 | for (const LineColumnEntry &group : lines) { |
| 475 | // Indices in this structure are actually offsets of records in the |
| 476 | // DEBUG_S_FILECHECKSUMS subsection. Those entries then have an index |
| 477 | // into the global PDB string table. |
| 478 | auto iter = checksums.at(group.NameIndex); |
| 479 | if (iter == checksums.end()) |
| 480 | continue; |
| 481 | |
| 482 | llvm::Expected<llvm::StringRef> efn = |
| 483 | strings.getString(iter->FileNameOffset); |
| 484 | if (!efn) { |
| 485 | llvm::consumeError(efn.takeError()); |
| 486 | continue; |
| 487 | } |
| 488 | |
| 489 | // LLDB wants the index of the file in the list of support files. |
| 490 | auto fn_iter = llvm::find(cci->m_file_list, *efn); |
| 491 | lldbassert(fn_iter != cci->m_file_list.end()); |
| 492 | uint32_t file_index = std::distance(cci->m_file_list.begin(), fn_iter); |
| 493 | |
| 494 | std::unique_ptr<LineSequence> sequence( |
| 495 | line_table->CreateLineSequenceContainer()); |
| 496 | lldbassert(!group.LineNumbers.empty()); |
| 497 | |
| 498 | for (const LineNumberEntry &entry : group.LineNumbers) { |
| 499 | AppendLineEntryToSequence(*line_table, *sequence, *cci, virtual_addr, |
| 500 | file_index, *lfh, entry); |
| 501 | } |
| 502 | LineInfo last_line(group.LineNumbers.back().Flags); |
| 503 | TerminateLineSequence(*line_table, *lfh, virtual_addr, file_index, |
| 504 | last_line.getEndLine(), std::move(sequence)); |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | if (line_table->GetSize() == 0) |
| 509 | return false; |
| 510 | |
| 511 | sc.comp_unit->SetLineTable(line_table.release()); |
| 512 | return true; |
| 513 | } |
| 514 | |
| 515 | bool SymbolFileNativePDB::ParseCompileUnitDebugMacros( |
| 516 | const lldb_private::SymbolContext &sc) { |
| 517 | // PDB doesn't contain information about macros |
| 518 | return false; |
| 519 | } |
| 520 | |
| 521 | bool SymbolFileNativePDB::ParseCompileUnitSupportFiles( |
| 522 | const lldb_private::SymbolContext &sc, |
| 523 | lldb_private::FileSpecList &support_files) { |
| 524 | lldbassert(sc.comp_unit); |
| 525 | |
| 526 | PdbSymUid comp_uid = PdbSymUid::fromOpaqueId(sc.comp_unit->GetID()); |
| 527 | lldbassert(comp_uid.tag() == PDB_SymType::Compiland); |
| 528 | |
| 529 | const CompilandIndexItem *cci = m_index->compilands().GetCompiland(comp_uid); |
| 530 | lldbassert(cci); |
| 531 | |
| 532 | for (llvm::StringRef f : cci->m_file_list) { |
| 533 | FileSpec::Style style = |
| 534 | f.startswith("/") ? FileSpec::Style::posix : FileSpec::Style::windows; |
| 535 | FileSpec spec(f, false, style); |
| 536 | support_files.Append(spec); |
| 537 | } |
| 538 | |
| 539 | return true; |
| 540 | } |
| 541 | |
| 542 | bool SymbolFileNativePDB::ParseImportedModules( |
| 543 | const lldb_private::SymbolContext &sc, |
| 544 | std::vector<lldb_private::ConstString> &imported_modules) { |
| 545 | // PDB does not yet support module debug info |
| 546 | return false; |
| 547 | } |
| 548 | |
| 549 | size_t SymbolFileNativePDB::ParseFunctionBlocks( |
| 550 | const lldb_private::SymbolContext &sc) { |
| 551 | lldbassert(sc.comp_unit && sc.function); |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | uint32_t SymbolFileNativePDB::FindFunctions( |
| 556 | const lldb_private::ConstString &name, |
| 557 | const lldb_private::CompilerDeclContext *parent_decl_ctx, |
| 558 | uint32_t name_type_mask, bool include_inlines, bool append, |
| 559 | lldb_private::SymbolContextList &sc_list) { |
| 560 | // For now we only support lookup by method name. |
| 561 | if (!(name_type_mask & eFunctionNameTypeMethod)) |
| 562 | return 0; |
| 563 | |
| 564 | using SymbolAndOffset = std::pair<uint32_t, llvm::codeview::CVSymbol>; |
| 565 | |
| 566 | std::vector<SymbolAndOffset> matches = m_index->globals().findRecordsByName( |
| 567 | name.GetStringRef(), m_index->symrecords()); |
| 568 | for (const SymbolAndOffset &match : matches) { |
| 569 | if (match.second.kind() != S_PROCREF && match.second.kind() != S_LPROCREF) |
| 570 | continue; |
| 571 | ProcRefSym proc(match.second.kind()); |
| 572 | cantFail(SymbolDeserializer::deserializeAs<ProcRefSym>(match.second, proc)); |
| 573 | |
| 574 | if (!IsValidRecord(proc)) |
| 575 | continue; |
| 576 | |
| 577 | PdbSymUid cuid = PdbSymUid::makeCompilandId(proc); |
| 578 | CompilandIndexItem &cci = m_index->compilands().GetOrCreateCompiland(cuid); |
| 579 | lldb_private::SymbolContext sc; |
| 580 | |
| 581 | sc.comp_unit = GetOrCreateCompileUnit(cci).get(); |
| 582 | sc.module_sp = sc.comp_unit->GetModule(); |
| 583 | PdbSymUid func_uid = PdbSymUid::makeCuSymId(proc); |
| 584 | sc.function = GetOrCreateFunction(func_uid, sc).get(); |
| 585 | |
| 586 | sc_list.Append(sc); |
| 587 | } |
| 588 | |
| 589 | return sc_list.GetSize(); |
| 590 | } |
| 591 | |
| 592 | uint32_t |
| 593 | SymbolFileNativePDB::FindFunctions(const lldb_private::RegularExpression ®ex, |
| 594 | bool include_inlines, bool append, |
| 595 | lldb_private::SymbolContextList &sc_list) { |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | lldb_private::CompilerDeclContext SymbolFileNativePDB::FindNamespace( |
| 600 | const lldb_private::SymbolContext &sc, |
| 601 | const lldb_private::ConstString &name, |
| 602 | const lldb_private::CompilerDeclContext *parent_decl_ctx) { |
| 603 | return {}; |
| 604 | } |
| 605 | |
| 606 | lldb_private::TypeSystem * |
| 607 | SymbolFileNativePDB::GetTypeSystemForLanguage(lldb::LanguageType language) { |
| 608 | auto type_system = |
| 609 | m_obj_file->GetModule()->GetTypeSystemForLanguage(language); |
| 610 | if (type_system) |
| 611 | type_system->SetSymbolFile(this); |
| 612 | return type_system; |
| 613 | } |
| 614 | |
| 615 | lldb_private::ConstString SymbolFileNativePDB::GetPluginName() { |
| 616 | static ConstString g_name("pdb"); |
| 617 | return g_name; |
| 618 | } |
| 619 | |
| 620 | uint32_t SymbolFileNativePDB::GetPluginVersion() { return 1; } |