1 #include "llvm/DebugInfo/PDB/Native/SymbolCache.h"
2
3 #include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
4 #include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h"
5 #include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
6 #include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"
7 #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
8 #include "llvm/DebugInfo/CodeView/SymbolRecord.h"
9 #include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
10 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
11 #include "llvm/DebugInfo/CodeView/TypeRecordHelpers.h"
12 #include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
13 #include "llvm/DebugInfo/PDB/Native/DbiModuleList.h"
14 #include "llvm/DebugInfo/PDB/Native/DbiStream.h"
15 #include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h"
16 #include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
17 #include "llvm/DebugInfo/PDB/Native/NativeEnumGlobals.h"
18 #include "llvm/DebugInfo/PDB/Native/NativeEnumLineNumbers.h"
19 #include "llvm/DebugInfo/PDB/Native/NativeEnumTypes.h"
20 #include "llvm/DebugInfo/PDB/Native/NativeFunctionSymbol.h"
21 #include "llvm/DebugInfo/PDB/Native/NativeInlineSiteSymbol.h"
22 #include "llvm/DebugInfo/PDB/Native/NativeLineNumber.h"
23 #include "llvm/DebugInfo/PDB/Native/NativePublicSymbol.h"
24 #include "llvm/DebugInfo/PDB/Native/NativeRawSymbol.h"
25 #include "llvm/DebugInfo/PDB/Native/NativeSession.h"
26 #include "llvm/DebugInfo/PDB/Native/NativeTypeArray.h"
27 #include "llvm/DebugInfo/PDB/Native/NativeTypeBuiltin.h"
28 #include "llvm/DebugInfo/PDB/Native/NativeTypeEnum.h"
29 #include "llvm/DebugInfo/PDB/Native/NativeTypeFunctionSig.h"
30 #include "llvm/DebugInfo/PDB/Native/NativeTypePointer.h"
31 #include "llvm/DebugInfo/PDB/Native/NativeTypeTypedef.h"
32 #include "llvm/DebugInfo/PDB/Native/NativeTypeUDT.h"
33 #include "llvm/DebugInfo/PDB/Native/NativeTypeVTShape.h"
34 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
35 #include "llvm/DebugInfo/PDB/Native/PublicsStream.h"
36 #include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
37 #include "llvm/DebugInfo/PDB/Native/TpiStream.h"
38 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
39 #include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
40
41 using namespace llvm;
42 using namespace llvm::codeview;
43 using namespace llvm::pdb;
44
45 // Maps codeview::SimpleTypeKind of a built-in type to the parameters necessary
46 // to instantiate a NativeBuiltinSymbol for that type.
47 static const struct BuiltinTypeEntry {
48 codeview::SimpleTypeKind Kind;
49 PDB_BuiltinType Type;
50 uint32_t Size;
51 } BuiltinTypes[] = {
52 {codeview::SimpleTypeKind::None, PDB_BuiltinType::None, 0},
53 {codeview::SimpleTypeKind::Void, PDB_BuiltinType::Void, 0},
54 {codeview::SimpleTypeKind::HResult, PDB_BuiltinType::HResult, 4},
55 {codeview::SimpleTypeKind::Int16Short, PDB_BuiltinType::Int, 2},
56 {codeview::SimpleTypeKind::UInt16Short, PDB_BuiltinType::UInt, 2},
57 {codeview::SimpleTypeKind::Int32, PDB_BuiltinType::Int, 4},
58 {codeview::SimpleTypeKind::UInt32, PDB_BuiltinType::UInt, 4},
59 {codeview::SimpleTypeKind::Int32Long, PDB_BuiltinType::Int, 4},
60 {codeview::SimpleTypeKind::UInt32Long, PDB_BuiltinType::UInt, 4},
61 {codeview::SimpleTypeKind::Int64Quad, PDB_BuiltinType::Int, 8},
62 {codeview::SimpleTypeKind::UInt64Quad, PDB_BuiltinType::UInt, 8},
63 {codeview::SimpleTypeKind::NarrowCharacter, PDB_BuiltinType::Char, 1},
64 {codeview::SimpleTypeKind::WideCharacter, PDB_BuiltinType::WCharT, 2},
65 {codeview::SimpleTypeKind::Character16, PDB_BuiltinType::Char16, 2},
66 {codeview::SimpleTypeKind::Character32, PDB_BuiltinType::Char32, 4},
67 {codeview::SimpleTypeKind::Character8, PDB_BuiltinType::Char8, 1},
68 {codeview::SimpleTypeKind::SignedCharacter, PDB_BuiltinType::Char, 1},
69 {codeview::SimpleTypeKind::UnsignedCharacter, PDB_BuiltinType::UInt, 1},
70 {codeview::SimpleTypeKind::Float32, PDB_BuiltinType::Float, 4},
71 {codeview::SimpleTypeKind::Float64, PDB_BuiltinType::Float, 8},
72 {codeview::SimpleTypeKind::Float80, PDB_BuiltinType::Float, 10},
73 {codeview::SimpleTypeKind::Boolean8, PDB_BuiltinType::Bool, 1},
74 // This table can be grown as necessary, but these are the only types we've
75 // needed so far.
76 };
77
SymbolCache(NativeSession & Session,DbiStream * Dbi)78 SymbolCache::SymbolCache(NativeSession &Session, DbiStream *Dbi)
79 : Session(Session), Dbi(Dbi) {
80 // Id 0 is reserved for the invalid symbol.
81 Cache.push_back(nullptr);
82 SourceFiles.push_back(nullptr);
83
84 if (Dbi)
85 Compilands.resize(Dbi->modules().getModuleCount());
86 }
87
88 std::unique_ptr<IPDBEnumSymbols>
createTypeEnumerator(TypeLeafKind Kind)89 SymbolCache::createTypeEnumerator(TypeLeafKind Kind) {
90 return createTypeEnumerator(std::vector<TypeLeafKind>{Kind});
91 }
92
93 std::unique_ptr<IPDBEnumSymbols>
createTypeEnumerator(std::vector<TypeLeafKind> Kinds)94 SymbolCache::createTypeEnumerator(std::vector<TypeLeafKind> Kinds) {
95 auto Tpi = Session.getPDBFile().getPDBTpiStream();
96 if (!Tpi) {
97 consumeError(Tpi.takeError());
98 return nullptr;
99 }
100 auto &Types = Tpi->typeCollection();
101 return std::unique_ptr<IPDBEnumSymbols>(
102 new NativeEnumTypes(Session, Types, std::move(Kinds)));
103 }
104
105 std::unique_ptr<IPDBEnumSymbols>
createGlobalsEnumerator(codeview::SymbolKind Kind)106 SymbolCache::createGlobalsEnumerator(codeview::SymbolKind Kind) {
107 return std::unique_ptr<IPDBEnumSymbols>(
108 new NativeEnumGlobals(Session, {Kind}));
109 }
110
createSimpleType(TypeIndex Index,ModifierOptions Mods) const111 SymIndexId SymbolCache::createSimpleType(TypeIndex Index,
112 ModifierOptions Mods) const {
113 if (Index.getSimpleMode() != codeview::SimpleTypeMode::Direct)
114 return createSymbol<NativeTypePointer>(Index);
115
116 const auto Kind = Index.getSimpleKind();
117 const auto It =
118 llvm::find_if(BuiltinTypes, [Kind](const BuiltinTypeEntry &Builtin) {
119 return Builtin.Kind == Kind;
120 });
121 if (It == std::end(BuiltinTypes))
122 return 0;
123 return createSymbol<NativeTypeBuiltin>(Mods, It->Type, It->Size);
124 }
125
126 SymIndexId
createSymbolForModifiedType(codeview::TypeIndex ModifierTI,codeview::CVType CVT) const127 SymbolCache::createSymbolForModifiedType(codeview::TypeIndex ModifierTI,
128 codeview::CVType CVT) const {
129 ModifierRecord Record;
130 if (auto EC = TypeDeserializer::deserializeAs<ModifierRecord>(CVT, Record)) {
131 consumeError(std::move(EC));
132 return 0;
133 }
134
135 if (Record.ModifiedType.isSimple())
136 return createSimpleType(Record.ModifiedType, Record.Modifiers);
137
138 // Make sure we create and cache a record for the unmodified type.
139 SymIndexId UnmodifiedId = findSymbolByTypeIndex(Record.ModifiedType);
140 NativeRawSymbol &UnmodifiedNRS = *Cache[UnmodifiedId];
141
142 switch (UnmodifiedNRS.getSymTag()) {
143 case PDB_SymType::Enum:
144 return createSymbol<NativeTypeEnum>(
145 static_cast<NativeTypeEnum &>(UnmodifiedNRS), std::move(Record));
146 case PDB_SymType::UDT:
147 return createSymbol<NativeTypeUDT>(
148 static_cast<NativeTypeUDT &>(UnmodifiedNRS), std::move(Record));
149 default:
150 // No other types can be modified. (LF_POINTER, for example, records
151 // its modifiers a different way.
152 assert(false && "Invalid LF_MODIFIER record");
153 break;
154 }
155 return 0;
156 }
157
findSymbolByTypeIndex(codeview::TypeIndex Index) const158 SymIndexId SymbolCache::findSymbolByTypeIndex(codeview::TypeIndex Index) const {
159 // First see if it's already in our cache.
160 const auto Entry = TypeIndexToSymbolId.find(Index);
161 if (Entry != TypeIndexToSymbolId.end())
162 return Entry->second;
163
164 // Symbols for built-in types are created on the fly.
165 if (Index.isSimple()) {
166 SymIndexId Result = createSimpleType(Index, ModifierOptions::None);
167 assert(TypeIndexToSymbolId.count(Index) == 0);
168 TypeIndexToSymbolId[Index] = Result;
169 return Result;
170 }
171
172 // We need to instantiate and cache the desired type symbol.
173 auto Tpi = Session.getPDBFile().getPDBTpiStream();
174 if (!Tpi) {
175 consumeError(Tpi.takeError());
176 return 0;
177 }
178 codeview::LazyRandomTypeCollection &Types = Tpi->typeCollection();
179 codeview::CVType CVT = Types.getType(Index);
180
181 if (isUdtForwardRef(CVT)) {
182 Expected<TypeIndex> EFD = Tpi->findFullDeclForForwardRef(Index);
183
184 if (!EFD)
185 consumeError(EFD.takeError());
186 else if (*EFD != Index) {
187 assert(!isUdtForwardRef(Types.getType(*EFD)));
188 SymIndexId Result = findSymbolByTypeIndex(*EFD);
189 // Record a mapping from ForwardRef -> SymIndex of complete type so that
190 // we'll take the fast path next time.
191 assert(TypeIndexToSymbolId.count(Index) == 0);
192 TypeIndexToSymbolId[Index] = Result;
193 return Result;
194 }
195 }
196
197 // At this point if we still have a forward ref udt it means the full decl was
198 // not in the PDB. We just have to deal with it and use the forward ref.
199 SymIndexId Id = 0;
200 switch (CVT.kind()) {
201 case codeview::LF_ENUM:
202 Id = createSymbolForType<NativeTypeEnum, EnumRecord>(Index, std::move(CVT));
203 break;
204 case codeview::LF_ARRAY:
205 Id = createSymbolForType<NativeTypeArray, ArrayRecord>(Index,
206 std::move(CVT));
207 break;
208 case codeview::LF_CLASS:
209 case codeview::LF_STRUCTURE:
210 case codeview::LF_INTERFACE:
211 Id = createSymbolForType<NativeTypeUDT, ClassRecord>(Index, std::move(CVT));
212 break;
213 case codeview::LF_UNION:
214 Id = createSymbolForType<NativeTypeUDT, UnionRecord>(Index, std::move(CVT));
215 break;
216 case codeview::LF_POINTER:
217 Id = createSymbolForType<NativeTypePointer, PointerRecord>(Index,
218 std::move(CVT));
219 break;
220 case codeview::LF_MODIFIER:
221 Id = createSymbolForModifiedType(Index, std::move(CVT));
222 break;
223 case codeview::LF_PROCEDURE:
224 Id = createSymbolForType<NativeTypeFunctionSig, ProcedureRecord>(
225 Index, std::move(CVT));
226 break;
227 case codeview::LF_MFUNCTION:
228 Id = createSymbolForType<NativeTypeFunctionSig, MemberFunctionRecord>(
229 Index, std::move(CVT));
230 break;
231 case codeview::LF_VTSHAPE:
232 Id = createSymbolForType<NativeTypeVTShape, VFTableShapeRecord>(
233 Index, std::move(CVT));
234 break;
235 default:
236 Id = createSymbolPlaceholder();
237 break;
238 }
239 if (Id != 0) {
240 assert(TypeIndexToSymbolId.count(Index) == 0);
241 TypeIndexToSymbolId[Index] = Id;
242 }
243 return Id;
244 }
245
246 std::unique_ptr<PDBSymbol>
getSymbolById(SymIndexId SymbolId) const247 SymbolCache::getSymbolById(SymIndexId SymbolId) const {
248 assert(SymbolId < Cache.size());
249
250 // Id 0 is reserved.
251 if (SymbolId == 0 || SymbolId >= Cache.size())
252 return nullptr;
253
254 // Make sure to handle the case where we've inserted a placeholder symbol
255 // for types we don't yet support.
256 NativeRawSymbol *NRS = Cache[SymbolId].get();
257 if (!NRS)
258 return nullptr;
259
260 return PDBSymbol::create(Session, *NRS);
261 }
262
getNativeSymbolById(SymIndexId SymbolId) const263 NativeRawSymbol &SymbolCache::getNativeSymbolById(SymIndexId SymbolId) const {
264 return *Cache[SymbolId];
265 }
266
getNumCompilands() const267 uint32_t SymbolCache::getNumCompilands() const {
268 if (!Dbi)
269 return 0;
270
271 return Dbi->modules().getModuleCount();
272 }
273
getOrCreateGlobalSymbolByOffset(uint32_t Offset)274 SymIndexId SymbolCache::getOrCreateGlobalSymbolByOffset(uint32_t Offset) {
275 auto Iter = GlobalOffsetToSymbolId.find(Offset);
276 if (Iter != GlobalOffsetToSymbolId.end())
277 return Iter->second;
278
279 SymbolStream &SS = cantFail(Session.getPDBFile().getPDBSymbolStream());
280 CVSymbol CVS = SS.readRecord(Offset);
281 SymIndexId Id = 0;
282 switch (CVS.kind()) {
283 case SymbolKind::S_UDT: {
284 UDTSym US = cantFail(SymbolDeserializer::deserializeAs<UDTSym>(CVS));
285 Id = createSymbol<NativeTypeTypedef>(std::move(US));
286 break;
287 }
288 default:
289 Id = createSymbolPlaceholder();
290 break;
291 }
292 if (Id != 0) {
293 assert(GlobalOffsetToSymbolId.count(Offset) == 0);
294 GlobalOffsetToSymbolId[Offset] = Id;
295 }
296
297 return Id;
298 }
299
getOrCreateInlineSymbol(InlineSiteSym Sym,uint64_t ParentAddr,uint16_t Modi,uint32_t RecordOffset) const300 SymIndexId SymbolCache::getOrCreateInlineSymbol(InlineSiteSym Sym,
301 uint64_t ParentAddr,
302 uint16_t Modi,
303 uint32_t RecordOffset) const {
304 auto Iter = SymTabOffsetToSymbolId.find({Modi, RecordOffset});
305 if (Iter != SymTabOffsetToSymbolId.end())
306 return Iter->second;
307
308 SymIndexId Id = createSymbol<NativeInlineSiteSymbol>(Sym, ParentAddr);
309 SymTabOffsetToSymbolId.insert({{Modi, RecordOffset}, Id});
310 return Id;
311 }
312
313 std::unique_ptr<PDBSymbol>
findSymbolBySectOffset(uint32_t Sect,uint32_t Offset,PDB_SymType Type)314 SymbolCache::findSymbolBySectOffset(uint32_t Sect, uint32_t Offset,
315 PDB_SymType Type) {
316 switch (Type) {
317 case PDB_SymType::Function:
318 return findFunctionSymbolBySectOffset(Sect, Offset);
319 case PDB_SymType::PublicSymbol:
320 return findPublicSymbolBySectOffset(Sect, Offset);
321 case PDB_SymType::Compiland: {
322 uint16_t Modi;
323 if (!Session.moduleIndexForSectOffset(Sect, Offset, Modi))
324 return nullptr;
325 return getOrCreateCompiland(Modi);
326 }
327 case PDB_SymType::None: {
328 // FIXME: Implement for PDB_SymType::Data. The symbolizer calls this but
329 // only uses it to find the symbol length.
330 if (auto Sym = findFunctionSymbolBySectOffset(Sect, Offset))
331 return Sym;
332 return nullptr;
333 }
334 default:
335 return nullptr;
336 }
337 }
338
339 std::unique_ptr<PDBSymbol>
findFunctionSymbolBySectOffset(uint32_t Sect,uint32_t Offset)340 SymbolCache::findFunctionSymbolBySectOffset(uint32_t Sect, uint32_t Offset) {
341 auto Iter = AddressToSymbolId.find({Sect, Offset});
342 if (Iter != AddressToSymbolId.end())
343 return getSymbolById(Iter->second);
344
345 if (!Dbi)
346 return nullptr;
347
348 uint16_t Modi;
349 if (!Session.moduleIndexForSectOffset(Sect, Offset, Modi))
350 return nullptr;
351
352 Expected<ModuleDebugStreamRef> ExpectedModS =
353 Session.getModuleDebugStream(Modi);
354 if (!ExpectedModS) {
355 consumeError(ExpectedModS.takeError());
356 return nullptr;
357 }
358 CVSymbolArray Syms = ExpectedModS->getSymbolArray();
359
360 // Search for the symbol in this module.
361 for (auto I = Syms.begin(), E = Syms.end(); I != E; ++I) {
362 if (I->kind() != S_LPROC32 && I->kind() != S_GPROC32)
363 continue;
364 auto PS = cantFail(SymbolDeserializer::deserializeAs<ProcSym>(*I));
365 if (Sect == PS.Segment && Offset >= PS.CodeOffset &&
366 Offset < PS.CodeOffset + PS.CodeSize) {
367 // Check if the symbol is already cached.
368 auto Found = AddressToSymbolId.find({PS.Segment, PS.CodeOffset});
369 if (Found != AddressToSymbolId.end())
370 return getSymbolById(Found->second);
371
372 // Otherwise, create a new symbol.
373 SymIndexId Id = createSymbol<NativeFunctionSymbol>(PS, I.offset());
374 AddressToSymbolId.insert({{PS.Segment, PS.CodeOffset}, Id});
375 return getSymbolById(Id);
376 }
377
378 // Jump to the end of this ProcSym.
379 I = Syms.at(PS.End);
380 }
381 return nullptr;
382 }
383
384 std::unique_ptr<PDBSymbol>
findPublicSymbolBySectOffset(uint32_t Sect,uint32_t Offset)385 SymbolCache::findPublicSymbolBySectOffset(uint32_t Sect, uint32_t Offset) {
386 auto Iter = AddressToPublicSymId.find({Sect, Offset});
387 if (Iter != AddressToPublicSymId.end())
388 return getSymbolById(Iter->second);
389
390 auto Publics = Session.getPDBFile().getPDBPublicsStream();
391 if (!Publics)
392 return nullptr;
393
394 auto ExpectedSyms = Session.getPDBFile().getPDBSymbolStream();
395 if (!ExpectedSyms)
396 return nullptr;
397 BinaryStreamRef SymStream =
398 ExpectedSyms->getSymbolArray().getUnderlyingStream();
399
400 // Use binary search to find the first public symbol with an address greater
401 // than or equal to Sect, Offset.
402 auto AddrMap = Publics->getAddressMap();
403 auto First = AddrMap.begin();
404 auto It = AddrMap.begin();
405 size_t Count = AddrMap.size();
406 size_t Half;
407 while (Count > 0) {
408 It = First;
409 Half = Count / 2;
410 It += Half;
411 Expected<CVSymbol> Sym = readSymbolFromStream(SymStream, *It);
412 if (!Sym) {
413 consumeError(Sym.takeError());
414 return nullptr;
415 }
416
417 auto PS =
418 cantFail(SymbolDeserializer::deserializeAs<PublicSym32>(Sym.get()));
419 if (PS.Segment < Sect || (PS.Segment == Sect && PS.Offset <= Offset)) {
420 First = ++It;
421 Count -= Half + 1;
422 } else
423 Count = Half;
424 }
425 if (It == AddrMap.begin())
426 return nullptr;
427 --It;
428
429 Expected<CVSymbol> Sym = readSymbolFromStream(SymStream, *It);
430 if (!Sym) {
431 consumeError(Sym.takeError());
432 return nullptr;
433 }
434
435 // Check if the symbol is already cached.
436 auto PS = cantFail(SymbolDeserializer::deserializeAs<PublicSym32>(Sym.get()));
437 auto Found = AddressToPublicSymId.find({PS.Segment, PS.Offset});
438 if (Found != AddressToPublicSymId.end())
439 return getSymbolById(Found->second);
440
441 // Otherwise, create a new symbol.
442 SymIndexId Id = createSymbol<NativePublicSymbol>(PS);
443 AddressToPublicSymId.insert({{PS.Segment, PS.Offset}, Id});
444 return getSymbolById(Id);
445 }
446
447 std::vector<SymbolCache::LineTableEntry>
findLineTable(uint16_t Modi) const448 SymbolCache::findLineTable(uint16_t Modi) const {
449 // Check if this module has already been added.
450 auto LineTableIter = LineTable.find(Modi);
451 if (LineTableIter != LineTable.end())
452 return LineTableIter->second;
453
454 std::vector<LineTableEntry> &ModuleLineTable = LineTable[Modi];
455
456 // If there is an error or there are no lines, just return the
457 // empty vector.
458 Expected<ModuleDebugStreamRef> ExpectedModS =
459 Session.getModuleDebugStream(Modi);
460 if (!ExpectedModS) {
461 consumeError(ExpectedModS.takeError());
462 return ModuleLineTable;
463 }
464
465 std::vector<std::vector<LineTableEntry>> EntryList;
466 for (const auto &SS : ExpectedModS->getSubsectionsArray()) {
467 if (SS.kind() != DebugSubsectionKind::Lines)
468 continue;
469
470 DebugLinesSubsectionRef Lines;
471 BinaryStreamReader Reader(SS.getRecordData());
472 if (auto EC = Lines.initialize(Reader)) {
473 consumeError(std::move(EC));
474 continue;
475 }
476
477 uint32_t RelocSegment = Lines.header()->RelocSegment;
478 uint32_t RelocOffset = Lines.header()->RelocOffset;
479 for (const LineColumnEntry &Group : Lines) {
480 if (Group.LineNumbers.empty())
481 continue;
482
483 std::vector<LineTableEntry> Entries;
484
485 // If there are column numbers, then they should be in a parallel stream
486 // to the line numbers.
487 auto ColIt = Group.Columns.begin();
488 auto ColsEnd = Group.Columns.end();
489
490 // Add a line to mark the beginning of this section.
491 uint64_t StartAddr =
492 Session.getVAFromSectOffset(RelocSegment, RelocOffset);
493 LineInfo FirstLine(Group.LineNumbers.front().Flags);
494 uint32_t ColNum =
495 (Lines.hasColumnInfo()) ? Group.Columns.front().StartColumn : 0;
496 Entries.push_back({StartAddr, FirstLine, ColNum, Group.NameIndex, false});
497
498 for (const LineNumberEntry &LN : Group.LineNumbers) {
499 uint64_t VA =
500 Session.getVAFromSectOffset(RelocSegment, RelocOffset + LN.Offset);
501 LineInfo Line(LN.Flags);
502 ColNum = 0;
503
504 if (Lines.hasColumnInfo() && ColIt != ColsEnd) {
505 ColNum = ColIt->StartColumn;
506 ++ColIt;
507 }
508 Entries.push_back({VA, Line, ColNum, Group.NameIndex, false});
509 }
510
511 // Add a terminal entry line to mark the end of this subsection.
512 uint64_t EndAddr = StartAddr + Lines.header()->CodeSize;
513 LineInfo LastLine(Group.LineNumbers.back().Flags);
514 ColNum = (Lines.hasColumnInfo()) ? Group.Columns.back().StartColumn : 0;
515 Entries.push_back({EndAddr, LastLine, ColNum, Group.NameIndex, true});
516
517 EntryList.push_back(Entries);
518 }
519 }
520
521 // Sort EntryList, and add flattened contents to the line table.
522 llvm::sort(EntryList, [](const std::vector<LineTableEntry> &LHS,
523 const std::vector<LineTableEntry> &RHS) {
524 return LHS[0].Addr < RHS[0].Addr;
525 });
526 for (std::vector<LineTableEntry> &I : EntryList)
527 llvm::append_range(ModuleLineTable, I);
528
529 return ModuleLineTable;
530 }
531
532 std::unique_ptr<IPDBEnumLineNumbers>
findLineNumbersByVA(uint64_t VA,uint32_t Length) const533 SymbolCache::findLineNumbersByVA(uint64_t VA, uint32_t Length) const {
534 uint16_t Modi;
535 if (!Session.moduleIndexForVA(VA, Modi))
536 return nullptr;
537
538 std::vector<LineTableEntry> Lines = findLineTable(Modi);
539 if (Lines.empty())
540 return nullptr;
541
542 // Find the first line in the line table whose address is not greater than
543 // the one we are searching for.
544 auto LineIter = llvm::partition_point(Lines, [&](const LineTableEntry &E) {
545 return (E.Addr < VA || (E.Addr == VA && E.IsTerminalEntry));
546 });
547
548 // Try to back up if we've gone too far.
549 if (LineIter == Lines.end() || LineIter->Addr > VA) {
550 if (LineIter == Lines.begin() || std::prev(LineIter)->IsTerminalEntry)
551 return nullptr;
552 --LineIter;
553 }
554
555 Expected<ModuleDebugStreamRef> ExpectedModS =
556 Session.getModuleDebugStream(Modi);
557 if (!ExpectedModS) {
558 consumeError(ExpectedModS.takeError());
559 return nullptr;
560 }
561 Expected<DebugChecksumsSubsectionRef> ExpectedChecksums =
562 ExpectedModS->findChecksumsSubsection();
563 if (!ExpectedChecksums) {
564 consumeError(ExpectedChecksums.takeError());
565 return nullptr;
566 }
567
568 // Populate a vector of NativeLineNumbers that have addresses in the given
569 // address range.
570 std::vector<NativeLineNumber> LineNumbers;
571 while (LineIter != Lines.end()) {
572 if (LineIter->IsTerminalEntry) {
573 ++LineIter;
574 continue;
575 }
576
577 // If the line is still within the address range, create a NativeLineNumber
578 // and add to the list.
579 if (LineIter->Addr > VA + Length)
580 break;
581
582 uint32_t LineSect, LineOff;
583 Session.addressForVA(LineIter->Addr, LineSect, LineOff);
584 uint32_t LineLength = std::next(LineIter)->Addr - LineIter->Addr;
585 auto ChecksumIter =
586 ExpectedChecksums->getArray().at(LineIter->FileNameIndex);
587 uint32_t SrcFileId = getOrCreateSourceFile(*ChecksumIter);
588 NativeLineNumber LineNum(Session, LineIter->Line, LineIter->ColumnNumber,
589 LineSect, LineOff, LineLength, SrcFileId, Modi);
590 LineNumbers.push_back(LineNum);
591 ++LineIter;
592 }
593 return std::make_unique<NativeEnumLineNumbers>(std::move(LineNumbers));
594 }
595
596 std::unique_ptr<PDBSymbolCompiland>
getOrCreateCompiland(uint32_t Index)597 SymbolCache::getOrCreateCompiland(uint32_t Index) {
598 if (!Dbi)
599 return nullptr;
600
601 if (Index >= Compilands.size())
602 return nullptr;
603
604 if (Compilands[Index] == 0) {
605 const DbiModuleList &Modules = Dbi->modules();
606 Compilands[Index] =
607 createSymbol<NativeCompilandSymbol>(Modules.getModuleDescriptor(Index));
608 }
609
610 return Session.getConcreteSymbolById<PDBSymbolCompiland>(Compilands[Index]);
611 }
612
613 std::unique_ptr<IPDBSourceFile>
getSourceFileById(SymIndexId FileId) const614 SymbolCache::getSourceFileById(SymIndexId FileId) const {
615 assert(FileId < SourceFiles.size());
616
617 // Id 0 is reserved.
618 if (FileId == 0)
619 return nullptr;
620
621 return std::make_unique<NativeSourceFile>(*SourceFiles[FileId].get());
622 }
623
624 SymIndexId
getOrCreateSourceFile(const FileChecksumEntry & Checksums) const625 SymbolCache::getOrCreateSourceFile(const FileChecksumEntry &Checksums) const {
626 auto Iter = FileNameOffsetToId.find(Checksums.FileNameOffset);
627 if (Iter != FileNameOffsetToId.end())
628 return Iter->second;
629
630 SymIndexId Id = SourceFiles.size();
631 auto SrcFile = std::make_unique<NativeSourceFile>(Session, Id, Checksums);
632 SourceFiles.push_back(std::move(SrcFile));
633 FileNameOffsetToId[Checksums.FileNameOffset] = Id;
634 return Id;
635 }
636
637
638