1 //===- CodeViewYAMLSymbols.cpp - CodeView YAMLIO Symbol implementation ----===//
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 // This file defines classes for handling the YAML representation of CodeView
11 // Debug Info.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "llvm/ObjectYAML/CodeViewYAMLSymbols.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/ADT/StringSwitch.h"
18 #include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
19 #include "llvm/DebugInfo/CodeView/CodeViewError.h"
20 #include "llvm/DebugInfo/CodeView/EnumTables.h"
21 #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
22 #include "llvm/DebugInfo/CodeView/SymbolSerializer.h"
23 
24 using namespace llvm;
25 using namespace llvm::codeview;
26 using namespace llvm::CodeViewYAML;
27 using namespace llvm::CodeViewYAML::detail;
28 using namespace llvm::yaml;
29 
30 LLVM_YAML_IS_SEQUENCE_VECTOR(StringRef)
31 LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(TypeIndex)
32 
33 // We only need to declare these, the definitions are in CodeViewYAMLTypes.cpp
34 LLVM_YAML_DECLARE_SCALAR_TRAITS(APSInt, false)
35 LLVM_YAML_DECLARE_SCALAR_TRAITS(TypeIndex, false)
36 
37 LLVM_YAML_DECLARE_ENUM_TRAITS(SymbolKind)
38 LLVM_YAML_DECLARE_ENUM_TRAITS(FrameCookieKind)
39 
40 LLVM_YAML_DECLARE_BITSET_TRAITS(CompileSym2Flags)
41 LLVM_YAML_DECLARE_BITSET_TRAITS(CompileSym3Flags)
42 LLVM_YAML_DECLARE_BITSET_TRAITS(ExportFlags)
43 LLVM_YAML_DECLARE_BITSET_TRAITS(PublicSymFlags)
44 LLVM_YAML_DECLARE_BITSET_TRAITS(LocalSymFlags)
45 LLVM_YAML_DECLARE_BITSET_TRAITS(ProcSymFlags)
46 LLVM_YAML_DECLARE_BITSET_TRAITS(FrameProcedureOptions)
47 LLVM_YAML_DECLARE_ENUM_TRAITS(CPUType)
48 LLVM_YAML_DECLARE_ENUM_TRAITS(RegisterId)
49 LLVM_YAML_DECLARE_ENUM_TRAITS(TrampolineType)
50 LLVM_YAML_DECLARE_ENUM_TRAITS(ThunkOrdinal)
51 
52 LLVM_YAML_STRONG_TYPEDEF(llvm::StringRef, TypeName)
53 
54 LLVM_YAML_DECLARE_SCALAR_TRAITS(TypeName, true)
55 
56 StringRef ScalarTraits<TypeName>::input(StringRef S, void *V, TypeName &T) {
57   return ScalarTraits<StringRef>::input(S, V, T.value);
58 }
59 void ScalarTraits<TypeName>::output(const TypeName &T, void *V,
60                                     llvm::raw_ostream &R) {
61   ScalarTraits<StringRef>::output(T.value, V, R);
62 }
63 
64 void ScalarEnumerationTraits<SymbolKind>::enumeration(IO &io,
65                                                       SymbolKind &Value) {
66   auto SymbolNames = getSymbolTypeNames();
67   for (const auto &E : SymbolNames)
68     io.enumCase(Value, E.Name.str().c_str(), E.Value);
69 }
70 
71 void ScalarBitSetTraits<CompileSym2Flags>::bitset(IO &io,
72                                                   CompileSym2Flags &Flags) {
73   auto FlagNames = getCompileSym2FlagNames();
74   for (const auto &E : FlagNames) {
75     io.bitSetCase(Flags, E.Name.str().c_str(),
76                   static_cast<CompileSym2Flags>(E.Value));
77   }
78 }
79 
80 void ScalarBitSetTraits<CompileSym3Flags>::bitset(IO &io,
81                                                   CompileSym3Flags &Flags) {
82   auto FlagNames = getCompileSym3FlagNames();
83   for (const auto &E : FlagNames) {
84     io.bitSetCase(Flags, E.Name.str().c_str(),
85                   static_cast<CompileSym3Flags>(E.Value));
86   }
87 }
88 
89 void ScalarBitSetTraits<ExportFlags>::bitset(IO &io, ExportFlags &Flags) {
90   auto FlagNames = getExportSymFlagNames();
91   for (const auto &E : FlagNames) {
92     io.bitSetCase(Flags, E.Name.str().c_str(),
93                   static_cast<ExportFlags>(E.Value));
94   }
95 }
96 
97 void ScalarBitSetTraits<PublicSymFlags>::bitset(IO &io, PublicSymFlags &Flags) {
98   auto FlagNames = getProcSymFlagNames();
99   for (const auto &E : FlagNames) {
100     io.bitSetCase(Flags, E.Name.str().c_str(),
101                   static_cast<PublicSymFlags>(E.Value));
102   }
103 }
104 
105 void ScalarBitSetTraits<LocalSymFlags>::bitset(IO &io, LocalSymFlags &Flags) {
106   auto FlagNames = getLocalFlagNames();
107   for (const auto &E : FlagNames) {
108     io.bitSetCase(Flags, E.Name.str().c_str(),
109                   static_cast<LocalSymFlags>(E.Value));
110   }
111 }
112 
113 void ScalarBitSetTraits<ProcSymFlags>::bitset(IO &io, ProcSymFlags &Flags) {
114   auto FlagNames = getProcSymFlagNames();
115   for (const auto &E : FlagNames) {
116     io.bitSetCase(Flags, E.Name.str().c_str(),
117                   static_cast<ProcSymFlags>(E.Value));
118   }
119 }
120 
121 void ScalarBitSetTraits<FrameProcedureOptions>::bitset(
122     IO &io, FrameProcedureOptions &Flags) {
123   auto FlagNames = getFrameProcSymFlagNames();
124   for (const auto &E : FlagNames) {
125     io.bitSetCase(Flags, E.Name.str().c_str(),
126                   static_cast<FrameProcedureOptions>(E.Value));
127   }
128 }
129 
130 void ScalarEnumerationTraits<CPUType>::enumeration(IO &io, CPUType &Cpu) {
131   auto CpuNames = getCPUTypeNames();
132   for (const auto &E : CpuNames) {
133     io.enumCase(Cpu, E.Name.str().c_str(), static_cast<CPUType>(E.Value));
134   }
135 }
136 
137 void ScalarEnumerationTraits<RegisterId>::enumeration(IO &io, RegisterId &Reg) {
138   auto RegNames = getRegisterNames();
139   for (const auto &E : RegNames) {
140     io.enumCase(Reg, E.Name.str().c_str(), static_cast<RegisterId>(E.Value));
141   }
142   io.enumFallback<Hex16>(Reg);
143 }
144 
145 void ScalarEnumerationTraits<TrampolineType>::enumeration(
146     IO &io, TrampolineType &Tramp) {
147   auto TrampNames = getTrampolineNames();
148   for (const auto &E : TrampNames) {
149     io.enumCase(Tramp, E.Name.str().c_str(),
150                 static_cast<TrampolineType>(E.Value));
151   }
152 }
153 
154 void ScalarEnumerationTraits<ThunkOrdinal>::enumeration(IO &io,
155                                                         ThunkOrdinal &Ord) {
156   auto ThunkNames = getThunkOrdinalNames();
157   for (const auto &E : ThunkNames) {
158     io.enumCase(Ord, E.Name.str().c_str(), static_cast<ThunkOrdinal>(E.Value));
159   }
160 }
161 
162 void ScalarEnumerationTraits<FrameCookieKind>::enumeration(
163     IO &io, FrameCookieKind &FC) {
164   auto ThunkNames = getFrameCookieKindNames();
165   for (const auto &E : ThunkNames) {
166     io.enumCase(FC, E.Name.str().c_str(),
167                 static_cast<FrameCookieKind>(E.Value));
168   }
169 }
170 
171 namespace llvm {
172 namespace CodeViewYAML {
173 namespace detail {
174 
175 struct SymbolRecordBase {
176   codeview::SymbolKind Kind;
177   explicit SymbolRecordBase(codeview::SymbolKind K) : Kind(K) {}
178 
179   virtual ~SymbolRecordBase() {}
180   virtual void map(yaml::IO &io) = 0;
181   virtual codeview::CVSymbol
182   toCodeViewSymbol(BumpPtrAllocator &Allocator,
183                    CodeViewContainer Container) const = 0;
184   virtual Error fromCodeViewSymbol(codeview::CVSymbol Type) = 0;
185 };
186 
187 template <typename T> struct SymbolRecordImpl : public SymbolRecordBase {
188   explicit SymbolRecordImpl(codeview::SymbolKind K)
189       : SymbolRecordBase(K), Symbol(static_cast<SymbolRecordKind>(K)) {}
190 
191   void map(yaml::IO &io) override;
192 
193   codeview::CVSymbol
194   toCodeViewSymbol(BumpPtrAllocator &Allocator,
195                    CodeViewContainer Container) const override {
196     return SymbolSerializer::writeOneSymbol(Symbol, Allocator, Container);
197   }
198   Error fromCodeViewSymbol(codeview::CVSymbol CVS) override {
199     return SymbolDeserializer::deserializeAs<T>(CVS, Symbol);
200   }
201 
202   mutable T Symbol;
203 };
204 
205 struct UnknownSymbolRecord : public SymbolRecordBase {
206   explicit UnknownSymbolRecord(codeview::SymbolKind K) : SymbolRecordBase(K) {}
207 
208   void map(yaml::IO &io) override;
209 
210   CVSymbol toCodeViewSymbol(BumpPtrAllocator &Allocator,
211                             CodeViewContainer Container) const override {
212     RecordPrefix Prefix;
213     uint32_t TotalLen = sizeof(RecordPrefix) + Data.size();
214     Prefix.RecordKind = Kind;
215     Prefix.RecordLen = TotalLen - 2;
216     uint8_t *Buffer = Allocator.Allocate<uint8_t>(TotalLen);
217     ::memcpy(Buffer, &Prefix, sizeof(RecordPrefix));
218     ::memcpy(Buffer + sizeof(RecordPrefix), Data.data(), Data.size());
219     return CVSymbol(Kind, ArrayRef<uint8_t>(Buffer, TotalLen));
220   }
221   Error fromCodeViewSymbol(CVSymbol CVS) override {
222     this->Kind = CVS.kind();
223     Data = CVS.RecordData.drop_front(sizeof(RecordPrefix));
224     return Error::success();
225   }
226 
227   std::vector<uint8_t> Data;
228 };
229 
230 template <> void SymbolRecordImpl<ScopeEndSym>::map(IO &IO) {}
231 
232 void UnknownSymbolRecord::map(yaml::IO &io) {
233   yaml::BinaryRef Binary;
234   if (io.outputting())
235     Binary = yaml::BinaryRef(Data);
236   io.mapRequired("Data", Binary);
237   if (!io.outputting()) {
238     std::string Str;
239     raw_string_ostream OS(Str);
240     Binary.writeAsBinary(OS);
241     OS.flush();
242     Data.assign(Str.begin(), Str.end());
243   }
244 }
245 
246 template <> void SymbolRecordImpl<Thunk32Sym>::map(IO &IO) {
247   IO.mapRequired("Parent", Symbol.Parent);
248   IO.mapRequired("End", Symbol.End);
249   IO.mapRequired("Next", Symbol.Next);
250   IO.mapRequired("Off", Symbol.Offset);
251   IO.mapRequired("Seg", Symbol.Segment);
252   IO.mapRequired("Len", Symbol.Length);
253   IO.mapRequired("Ordinal", Symbol.Thunk);
254 }
255 
256 template <> void SymbolRecordImpl<TrampolineSym>::map(IO &IO) {
257   IO.mapRequired("Type", Symbol.Type);
258   IO.mapRequired("Size", Symbol.Size);
259   IO.mapRequired("ThunkOff", Symbol.ThunkOffset);
260   IO.mapRequired("TargetOff", Symbol.TargetOffset);
261   IO.mapRequired("ThunkSection", Symbol.ThunkSection);
262   IO.mapRequired("TargetSection", Symbol.TargetSection);
263 }
264 
265 template <> void SymbolRecordImpl<SectionSym>::map(IO &IO) {
266   IO.mapRequired("SectionNumber", Symbol.SectionNumber);
267   IO.mapRequired("Alignment", Symbol.Alignment);
268   IO.mapRequired("Rva", Symbol.Rva);
269   IO.mapRequired("Length", Symbol.Length);
270   IO.mapRequired("Characteristics", Symbol.Characteristics);
271   IO.mapRequired("Name", Symbol.Name);
272 }
273 
274 template <> void SymbolRecordImpl<CoffGroupSym>::map(IO &IO) {
275   IO.mapRequired("Size", Symbol.Size);
276   IO.mapRequired("Characteristics", Symbol.Characteristics);
277   IO.mapRequired("Offset", Symbol.Offset);
278   IO.mapRequired("Segment", Symbol.Segment);
279   IO.mapRequired("Name", Symbol.Name);
280 }
281 
282 template <> void SymbolRecordImpl<ExportSym>::map(IO &IO) {
283   IO.mapRequired("Ordinal", Symbol.Ordinal);
284   IO.mapRequired("Flags", Symbol.Flags);
285   IO.mapRequired("Name", Symbol.Name);
286 }
287 
288 template <> void SymbolRecordImpl<ProcSym>::map(IO &IO) {
289   // TODO: Print the linkage name
290 
291   IO.mapRequired("PtrParent", Symbol.Parent);
292   IO.mapRequired("PtrEnd", Symbol.End);
293   IO.mapRequired("PtrNext", Symbol.Next);
294   IO.mapRequired("CodeSize", Symbol.CodeSize);
295   IO.mapRequired("DbgStart", Symbol.DbgStart);
296   IO.mapRequired("DbgEnd", Symbol.DbgEnd);
297   IO.mapRequired("FunctionType", Symbol.FunctionType);
298   IO.mapRequired("Segment", Symbol.Segment);
299   IO.mapRequired("Flags", Symbol.Flags);
300   IO.mapRequired("DisplayName", Symbol.Name);
301 }
302 
303 template <> void SymbolRecordImpl<RegisterSym>::map(IO &IO) {
304   IO.mapRequired("Type", Symbol.Index);
305   IO.mapRequired("Seg", Symbol.Register);
306   IO.mapRequired("Name", Symbol.Name);
307 }
308 
309 template <> void SymbolRecordImpl<PublicSym32>::map(IO &IO) {
310   IO.mapRequired("Flags", Symbol.Flags);
311   IO.mapRequired("Seg", Symbol.Segment);
312   IO.mapRequired("Off", Symbol.Offset);
313   IO.mapRequired("Name", Symbol.Name);
314 }
315 
316 template <> void SymbolRecordImpl<ProcRefSym>::map(IO &IO) {
317   IO.mapRequired("SumName", Symbol.SumName);
318   IO.mapRequired("SymOffset", Symbol.SymOffset);
319   IO.mapRequired("Mod", Symbol.Module);
320   IO.mapRequired("Name", Symbol.Name);
321 }
322 
323 template <> void SymbolRecordImpl<EnvBlockSym>::map(IO &IO) {
324   IO.mapRequired("Entries", Symbol.Fields);
325 }
326 
327 template <> void SymbolRecordImpl<InlineSiteSym>::map(IO &IO) {
328   IO.mapRequired("PtrParent", Symbol.Parent);
329   IO.mapRequired("PtrEnd", Symbol.End);
330   IO.mapRequired("Inlinee", Symbol.Inlinee);
331   // TODO: The binary annotations
332 }
333 
334 template <> void SymbolRecordImpl<LocalSym>::map(IO &IO) {
335   IO.mapRequired("Type", Symbol.Type);
336   IO.mapRequired("Flags", Symbol.Flags);
337 
338   IO.mapRequired("VarName", Symbol.Name);
339 }
340 
341 template <> void SymbolRecordImpl<DefRangeSym>::map(IO &IO) {
342   // TODO: Print the subfields
343 }
344 
345 template <> void SymbolRecordImpl<DefRangeSubfieldSym>::map(IO &IO) {
346   // TODO: Print the subfields
347 }
348 
349 template <> void SymbolRecordImpl<DefRangeRegisterSym>::map(IO &IO) {
350   // TODO: Print the subfields
351 }
352 
353 template <> void SymbolRecordImpl<DefRangeFramePointerRelSym>::map(IO &IO) {
354   // TODO: Print the subfields
355 }
356 
357 template <> void SymbolRecordImpl<DefRangeSubfieldRegisterSym>::map(IO &IO) {
358   // TODO: Print the subfields
359 }
360 
361 template <>
362 void SymbolRecordImpl<DefRangeFramePointerRelFullScopeSym>::map(IO &IO) {
363   // TODO: Print the subfields
364 }
365 
366 template <> void SymbolRecordImpl<DefRangeRegisterRelSym>::map(IO &IO) {
367   // TODO: Print the subfields
368 }
369 
370 template <> void SymbolRecordImpl<BlockSym>::map(IO &IO) {
371   // TODO: Print the linkage name
372   IO.mapRequired("PtrParent", Symbol.Parent);
373   IO.mapRequired("PtrEnd", Symbol.End);
374   IO.mapRequired("CodeSize", Symbol.CodeSize);
375   IO.mapRequired("Segment", Symbol.Segment);
376   IO.mapRequired("BlockName", Symbol.Name);
377 }
378 
379 template <> void SymbolRecordImpl<LabelSym>::map(IO &IO) {
380   // TODO: Print the linkage name
381   IO.mapRequired("Segment", Symbol.Segment);
382   IO.mapRequired("Flags", Symbol.Flags);
383   IO.mapRequired("Flags", Symbol.Flags);
384   IO.mapRequired("DisplayName", Symbol.Name);
385 }
386 
387 template <> void SymbolRecordImpl<ObjNameSym>::map(IO &IO) {
388   IO.mapRequired("Signature", Symbol.Signature);
389   IO.mapRequired("ObjectName", Symbol.Name);
390 }
391 
392 template <> void SymbolRecordImpl<Compile2Sym>::map(IO &IO) {
393   IO.mapRequired("Flags", Symbol.Flags);
394   IO.mapRequired("Machine", Symbol.Machine);
395   IO.mapRequired("FrontendMajor", Symbol.VersionFrontendMajor);
396   IO.mapRequired("FrontendMinor", Symbol.VersionFrontendMinor);
397   IO.mapRequired("FrontendBuild", Symbol.VersionFrontendBuild);
398   IO.mapRequired("BackendMajor", Symbol.VersionBackendMajor);
399   IO.mapRequired("BackendMinor", Symbol.VersionBackendMinor);
400   IO.mapRequired("BackendBuild", Symbol.VersionBackendBuild);
401   IO.mapRequired("Version", Symbol.Version);
402 }
403 
404 template <> void SymbolRecordImpl<Compile3Sym>::map(IO &IO) {
405   IO.mapRequired("Flags", Symbol.Flags);
406   IO.mapRequired("Machine", Symbol.Machine);
407   IO.mapRequired("FrontendMajor", Symbol.VersionFrontendMajor);
408   IO.mapRequired("FrontendMinor", Symbol.VersionFrontendMinor);
409   IO.mapRequired("FrontendBuild", Symbol.VersionFrontendBuild);
410   IO.mapRequired("FrontendQFE", Symbol.VersionFrontendQFE);
411   IO.mapRequired("BackendMajor", Symbol.VersionBackendMajor);
412   IO.mapRequired("BackendMinor", Symbol.VersionBackendMinor);
413   IO.mapRequired("BackendBuild", Symbol.VersionBackendBuild);
414   IO.mapRequired("BackendQFE", Symbol.VersionBackendQFE);
415   IO.mapRequired("Version", Symbol.Version);
416 }
417 
418 template <> void SymbolRecordImpl<FrameProcSym>::map(IO &IO) {
419   IO.mapRequired("TotalFrameBytes", Symbol.TotalFrameBytes);
420   IO.mapRequired("PaddingFrameBytes", Symbol.PaddingFrameBytes);
421   IO.mapRequired("OffsetToPadding", Symbol.OffsetToPadding);
422   IO.mapRequired("BytesOfCalleeSavedRegisters",
423                  Symbol.BytesOfCalleeSavedRegisters);
424   IO.mapRequired("OffsetOfExceptionHandler", Symbol.OffsetOfExceptionHandler);
425   IO.mapRequired("SectionIdOfExceptionHandler",
426                  Symbol.SectionIdOfExceptionHandler);
427   IO.mapRequired("Flags", Symbol.Flags);
428 }
429 
430 template <> void SymbolRecordImpl<CallSiteInfoSym>::map(IO &IO) {
431   // TODO: Map Linkage Name
432   IO.mapRequired("Segment", Symbol.Segment);
433   IO.mapRequired("Type", Symbol.Type);
434 }
435 
436 template <> void SymbolRecordImpl<FileStaticSym>::map(IO &IO) {
437   IO.mapRequired("Index", Symbol.Index);
438   IO.mapRequired("ModFilenameOffset", Symbol.ModFilenameOffset);
439   IO.mapRequired("Flags", Symbol.Flags);
440   IO.mapRequired("Name", Symbol.Name);
441 }
442 
443 template <> void SymbolRecordImpl<HeapAllocationSiteSym>::map(IO &IO) {
444   // TODO: Map Linkage Name
445   IO.mapRequired("Segment", Symbol.Segment);
446   IO.mapRequired("CallInstructionSize", Symbol.CallInstructionSize);
447   IO.mapRequired("Type", Symbol.Type);
448 }
449 
450 template <> void SymbolRecordImpl<FrameCookieSym>::map(IO &IO) {
451   // TODO: Map Linkage Name
452   IO.mapRequired("Register", Symbol.Register);
453   IO.mapRequired("CookieKind", Symbol.CookieKind);
454   IO.mapRequired("Flags", Symbol.Flags);
455 }
456 
457 template <> void SymbolRecordImpl<CallerSym>::map(IO &IO) {
458   IO.mapRequired("FuncID", Symbol.Indices);
459 }
460 
461 template <> void SymbolRecordImpl<UDTSym>::map(IO &IO) {
462   IO.mapRequired("Type", Symbol.Type);
463   IO.mapRequired("UDTName", Symbol.Name);
464 }
465 
466 template <> void SymbolRecordImpl<BuildInfoSym>::map(IO &IO) {
467   IO.mapRequired("BuildId", Symbol.BuildId);
468 }
469 
470 template <> void SymbolRecordImpl<BPRelativeSym>::map(IO &IO) {
471   IO.mapRequired("Offset", Symbol.Offset);
472   IO.mapRequired("Type", Symbol.Type);
473   IO.mapRequired("VarName", Symbol.Name);
474 }
475 
476 template <> void SymbolRecordImpl<RegRelativeSym>::map(IO &IO) {
477   IO.mapRequired("Offset", Symbol.Offset);
478   IO.mapRequired("Type", Symbol.Type);
479   IO.mapRequired("Register", Symbol.Register);
480   IO.mapRequired("VarName", Symbol.Name);
481 }
482 
483 template <> void SymbolRecordImpl<ConstantSym>::map(IO &IO) {
484   IO.mapRequired("Type", Symbol.Type);
485   IO.mapRequired("Value", Symbol.Value);
486   IO.mapRequired("Name", Symbol.Name);
487 }
488 
489 template <> void SymbolRecordImpl<DataSym>::map(IO &IO) {
490   // TODO: Map linkage name
491   IO.mapRequired("Type", Symbol.Type);
492   IO.mapRequired("DisplayName", Symbol.Name);
493 }
494 
495 template <> void SymbolRecordImpl<ThreadLocalDataSym>::map(IO &IO) {
496   // TODO: Map linkage name
497   IO.mapRequired("Type", Symbol.Type);
498   IO.mapRequired("DisplayName", Symbol.Name);
499 }
500 }
501 }
502 }
503 
504 CVSymbol CodeViewYAML::SymbolRecord::toCodeViewSymbol(
505     BumpPtrAllocator &Allocator, CodeViewContainer Container) const {
506   return Symbol->toCodeViewSymbol(Allocator, Container);
507 }
508 
509 namespace llvm {
510 namespace yaml {
511 template <> struct MappingTraits<SymbolRecordBase> {
512   static void mapping(IO &io, SymbolRecordBase &Record) { Record.map(io); }
513 };
514 }
515 }
516 
517 template <typename SymbolType>
518 static inline Expected<CodeViewYAML::SymbolRecord>
519 fromCodeViewSymbolImpl(CVSymbol Symbol) {
520   CodeViewYAML::SymbolRecord Result;
521 
522   auto Impl = std::make_shared<SymbolType>(Symbol.kind());
523   if (auto EC = Impl->fromCodeViewSymbol(Symbol))
524     return std::move(EC);
525   Result.Symbol = Impl;
526   return Result;
527 }
528 
529 Expected<CodeViewYAML::SymbolRecord>
530 CodeViewYAML::SymbolRecord::fromCodeViewSymbol(CVSymbol Symbol) {
531 #define SYMBOL_RECORD(EnumName, EnumVal, ClassName)                            \
532   case EnumName:                                                               \
533     return fromCodeViewSymbolImpl<SymbolRecordImpl<ClassName>>(Symbol);
534 #define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)           \
535   SYMBOL_RECORD(EnumName, EnumVal, ClassName)
536   switch (Symbol.kind()) {
537 #include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
538   default:
539     return fromCodeViewSymbolImpl<UnknownSymbolRecord>(Symbol);
540   }
541   return make_error<CodeViewError>(cv_error_code::corrupt_record);
542 }
543 
544 template <typename ConcreteType>
545 static void mapSymbolRecordImpl(IO &IO, const char *Class, SymbolKind Kind,
546                                 CodeViewYAML::SymbolRecord &Obj) {
547   if (!IO.outputting())
548     Obj.Symbol = std::make_shared<ConcreteType>(Kind);
549 
550   IO.mapRequired(Class, *Obj.Symbol);
551 }
552 
553 void MappingTraits<CodeViewYAML::SymbolRecord>::mapping(
554     IO &IO, CodeViewYAML::SymbolRecord &Obj) {
555   SymbolKind Kind;
556   if (IO.outputting())
557     Kind = Obj.Symbol->Kind;
558   IO.mapRequired("Kind", Kind);
559 
560 #define SYMBOL_RECORD(EnumName, EnumVal, ClassName)                            \
561   case EnumName:                                                               \
562     mapSymbolRecordImpl<SymbolRecordImpl<ClassName>>(IO, #ClassName, Kind,     \
563                                                      Obj);                     \
564     break;
565 #define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)           \
566   SYMBOL_RECORD(EnumName, EnumVal, ClassName)
567   switch (Kind) {
568 #include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
569   default:
570     mapSymbolRecordImpl<UnknownSymbolRecord>(IO, "UnknownSym", Kind, Obj);
571   }
572 }
573