1 //===-- SymbolFileDWARF.h --------------------------------------*- C++ -*-===//
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 #ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
10 #define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
11 
12 #include <list>
13 #include <map>
14 #include <mutex>
15 #include <unordered_map>
16 #include <vector>
17 
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/ADT/SetVector.h"
20 #include "llvm/Support/Threading.h"
21 
22 #include "lldb/Core/UniqueCStringMap.h"
23 #include "lldb/Core/dwarf.h"
24 #include "lldb/Expression/DWARFExpressionList.h"
25 #include "lldb/Symbol/DebugMacros.h"
26 #include "lldb/Symbol/SymbolContext.h"
27 #include "lldb/Symbol/SymbolFile.h"
28 #include "lldb/Target/Statistics.h"
29 #include "lldb/Utility/ConstString.h"
30 #include "lldb/Utility/Flags.h"
31 #include "lldb/Utility/RangeMap.h"
32 #include "lldb/lldb-private.h"
33 
34 #include "DWARFContext.h"
35 #include "DWARFDataExtractor.h"
36 #include "DWARFDefines.h"
37 #include "DWARFIndex.h"
38 #include "UniqueDWARFASTType.h"
39 
40 // Forward Declarations for this DWARF plugin
41 class DebugMapModule;
42 class DWARFAbbreviationDeclaration;
43 class DWARFAbbreviationDeclarationSet;
44 class DWARFCompileUnit;
45 class DWARFDebugAbbrev;
46 class DWARFDebugAranges;
47 class DWARFDebugInfo;
48 class DWARFDebugInfoEntry;
49 class DWARFDebugLine;
50 class DWARFDebugRanges;
51 class DWARFDeclContext;
52 class DWARFFormValue;
53 class DWARFTypeUnit;
54 class SymbolFileDWARFDebugMap;
55 class SymbolFileDWARFDwo;
56 class SymbolFileDWARFDwp;
57 
58 #define DIE_IS_BEING_PARSED ((lldb_private::Type *)1)
59 
60 class SymbolFileDWARF : public lldb_private::SymbolFileCommon,
61                         public lldb_private::UserID {
62   /// LLVM RTTI support.
63   static char ID;
64 
65 public:
66   /// LLVM RTTI support.
67   /// \{
68   bool isA(const void *ClassID) const override {
69     return ClassID == &ID || SymbolFileCommon::isA(ClassID);
70   }
71   static bool classof(const SymbolFile *obj) { return obj->isA(&ID); }
72   /// \}
73 
74   friend class SymbolFileDWARFDebugMap;
75   friend class SymbolFileDWARFDwo;
76   friend class DebugMapModule;
77   friend class DWARFCompileUnit;
78   friend class DWARFDIE;
79   friend class DWARFASTParserClang;
80 
81   // Static Functions
82   static void Initialize();
83 
84   static void Terminate();
85 
86   static void DebuggerInitialize(lldb_private::Debugger &debugger);
87 
88   static llvm::StringRef GetPluginNameStatic() { return "dwarf"; }
89 
90   static llvm::StringRef GetPluginDescriptionStatic();
91 
92   static lldb_private::SymbolFile *
93   CreateInstance(lldb::ObjectFileSP objfile_sp);
94 
95   // Constructors and Destructors
96 
97   SymbolFileDWARF(lldb::ObjectFileSP objfile_sp,
98                   lldb_private::SectionList *dwo_section_list);
99 
100   ~SymbolFileDWARF() override;
101 
102   uint32_t CalculateAbilities() override;
103 
104   void InitializeObject() override;
105 
106   // Compile Unit function calls
107 
108   lldb::LanguageType
109   ParseLanguage(lldb_private::CompileUnit &comp_unit) override;
110 
111   lldb_private::XcodeSDK
112   ParseXcodeSDK(lldb_private::CompileUnit &comp_unit) override;
113 
114   size_t ParseFunctions(lldb_private::CompileUnit &comp_unit) override;
115 
116   bool ParseLineTable(lldb_private::CompileUnit &comp_unit) override;
117 
118   bool ParseDebugMacros(lldb_private::CompileUnit &comp_unit) override;
119 
120   bool ForEachExternalModule(
121       lldb_private::CompileUnit &, llvm::DenseSet<lldb_private::SymbolFile *> &,
122       llvm::function_ref<bool(lldb_private::Module &)>) override;
123 
124   bool ParseSupportFiles(lldb_private::CompileUnit &comp_unit,
125                          lldb_private::FileSpecList &support_files) override;
126 
127   bool ParseIsOptimized(lldb_private::CompileUnit &comp_unit) override;
128 
129   size_t ParseTypes(lldb_private::CompileUnit &comp_unit) override;
130 
131   bool ParseImportedModules(
132       const lldb_private::SymbolContext &sc,
133       std::vector<lldb_private::SourceModule> &imported_modules) override;
134 
135   size_t ParseBlocksRecursive(lldb_private::Function &func) override;
136 
137   size_t
138   ParseVariablesForContext(const lldb_private::SymbolContext &sc) override;
139 
140   lldb_private::Type *ResolveTypeUID(lldb::user_id_t type_uid) override;
141   llvm::Optional<ArrayInfo> GetDynamicArrayInfoForUID(
142       lldb::user_id_t type_uid,
143       const lldb_private::ExecutionContext *exe_ctx) override;
144 
145   bool CompleteType(lldb_private::CompilerType &compiler_type) override;
146 
147   lldb_private::Type *ResolveType(const DWARFDIE &die,
148                                   bool assert_not_being_parsed = true,
149                                   bool resolve_function_context = false);
150 
151   lldb_private::CompilerDecl GetDeclForUID(lldb::user_id_t uid) override;
152 
153   lldb_private::CompilerDeclContext
154   GetDeclContextForUID(lldb::user_id_t uid) override;
155 
156   lldb_private::CompilerDeclContext
157   GetDeclContextContainingUID(lldb::user_id_t uid) override;
158 
159   void
160   ParseDeclsForContext(lldb_private::CompilerDeclContext decl_ctx) override;
161 
162   uint32_t ResolveSymbolContext(const lldb_private::Address &so_addr,
163                                 lldb::SymbolContextItem resolve_scope,
164                                 lldb_private::SymbolContext &sc) override;
165 
166   uint32_t ResolveSymbolContext(
167       const lldb_private::SourceLocationSpec &src_location_spec,
168       lldb::SymbolContextItem resolve_scope,
169       lldb_private::SymbolContextList &sc_list) override;
170 
171   void
172   FindGlobalVariables(lldb_private::ConstString name,
173                       const lldb_private::CompilerDeclContext &parent_decl_ctx,
174                       uint32_t max_matches,
175                       lldb_private::VariableList &variables) override;
176 
177   void FindGlobalVariables(const lldb_private::RegularExpression &regex,
178                            uint32_t max_matches,
179                            lldb_private::VariableList &variables) override;
180 
181   void FindFunctions(lldb_private::ConstString name,
182                      const lldb_private::CompilerDeclContext &parent_decl_ctx,
183                      lldb::FunctionNameType name_type_mask,
184                      bool include_inlines,
185                      lldb_private::SymbolContextList &sc_list) override;
186 
187   void FindFunctions(const lldb_private::RegularExpression &regex,
188                      bool include_inlines,
189                      lldb_private::SymbolContextList &sc_list) override;
190 
191   void GetMangledNamesForFunction(
192       const std::string &scope_qualified_name,
193       std::vector<lldb_private::ConstString> &mangled_names) override;
194 
195   void
196   FindTypes(lldb_private::ConstString name,
197             const lldb_private::CompilerDeclContext &parent_decl_ctx,
198             uint32_t max_matches,
199             llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
200             lldb_private::TypeMap &types) override;
201 
202   void FindTypes(llvm::ArrayRef<lldb_private::CompilerContext> pattern,
203                  lldb_private::LanguageSet languages,
204                  llvm::DenseSet<SymbolFile *> &searched_symbol_files,
205                  lldb_private::TypeMap &types) override;
206 
207   void GetTypes(lldb_private::SymbolContextScope *sc_scope,
208                 lldb::TypeClass type_mask,
209                 lldb_private::TypeList &type_list) override;
210 
211   llvm::Expected<lldb_private::TypeSystem &>
212   GetTypeSystemForLanguage(lldb::LanguageType language) override;
213 
214   lldb_private::CompilerDeclContext FindNamespace(
215       lldb_private::ConstString name,
216       const lldb_private::CompilerDeclContext &parent_decl_ctx) override;
217 
218   void PreloadSymbols() override;
219 
220   std::recursive_mutex &GetModuleMutex() const override;
221 
222   // PluginInterface protocol
223   llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
224 
225   DWARFDebugAbbrev *DebugAbbrev();
226 
227   DWARFDebugInfo &DebugInfo();
228 
229   DWARFDebugRanges *GetDebugRanges();
230 
231   static bool SupportedVersion(uint16_t version);
232 
233   DWARFDIE
234   GetDeclContextDIEContainingDIE(const DWARFDIE &die);
235 
236   bool
237   HasForwardDeclForClangType(const lldb_private::CompilerType &compiler_type);
238 
239   lldb_private::CompileUnit *
240   GetCompUnitForDWARFCompUnit(DWARFCompileUnit &dwarf_cu);
241 
242   virtual void GetObjCMethods(lldb_private::ConstString class_name,
243                               llvm::function_ref<bool(DWARFDIE die)> callback);
244 
245   bool Supports_DW_AT_APPLE_objc_complete_type(DWARFUnit *cu);
246 
247   lldb_private::DebugMacrosSP ParseDebugMacros(lldb::offset_t *offset);
248 
249   static DWARFDIE GetParentSymbolContextDIE(const DWARFDIE &die);
250 
251   lldb::ModuleSP GetExternalModule(lldb_private::ConstString name);
252 
253   typedef std::map<lldb_private::ConstString, lldb::ModuleSP>
254       ExternalTypeModuleMap;
255 
256   /// Return the list of Clang modules imported by this SymbolFile.
257   const ExternalTypeModuleMap &getExternalTypeModules() const {
258     return m_external_type_modules;
259   }
260 
261   virtual DWARFDIE GetDIE(const DIERef &die_ref);
262 
263   DWARFDIE GetDIE(lldb::user_id_t uid);
264 
265   lldb::user_id_t GetUID(const DWARFBaseDIE &die) {
266     return GetUID(die.GetDIERef());
267   }
268 
269   lldb::user_id_t GetUID(const llvm::Optional<DIERef> &ref) {
270     return ref ? GetUID(*ref) : LLDB_INVALID_UID;
271   }
272 
273   lldb::user_id_t GetUID(DIERef ref);
274 
275   std::shared_ptr<SymbolFileDWARFDwo>
276   GetDwoSymbolFileForCompileUnit(DWARFUnit &dwarf_cu,
277                                  const DWARFDebugInfoEntry &cu_die);
278 
279   virtual llvm::Optional<uint32_t> GetDwoNum() { return llvm::None; }
280 
281   /// If this is a DWARF object with a single CU, return its DW_AT_dwo_id.
282   llvm::Optional<uint64_t> GetDWOId();
283 
284   static bool
285   DIEInDeclContext(const lldb_private::CompilerDeclContext &parent_decl_ctx,
286                    const DWARFDIE &die);
287 
288   std::vector<std::unique_ptr<lldb_private::CallEdge>>
289   ParseCallEdgesInFunction(UserID func_id) override;
290 
291   void Dump(lldb_private::Stream &s) override;
292 
293   void DumpClangAST(lldb_private::Stream &s) override;
294 
295   lldb_private::DWARFContext &GetDWARFContext() { return m_context; }
296 
297   const std::shared_ptr<SymbolFileDWARFDwo> &GetDwpSymbolFile();
298 
299   lldb_private::FileSpec GetFile(DWARFUnit &unit, size_t file_idx);
300 
301   static llvm::Expected<lldb_private::TypeSystem &>
302   GetTypeSystem(DWARFUnit &unit);
303 
304   static DWARFASTParser *GetDWARFParser(DWARFUnit &unit);
305 
306   // CompilerDecl related functions
307 
308   static lldb_private::CompilerDecl GetDecl(const DWARFDIE &die);
309 
310   static lldb_private::CompilerDeclContext GetDeclContext(const DWARFDIE &die);
311 
312   static lldb_private::CompilerDeclContext
313   GetContainingDeclContext(const DWARFDIE &die);
314 
315   static DWARFDeclContext GetDWARFDeclContext(const DWARFDIE &die);
316 
317   static lldb::LanguageType LanguageTypeFromDWARF(uint64_t val);
318 
319   static lldb::LanguageType GetLanguage(DWARFUnit &unit);
320   /// Same as GetLanguage() but reports all C++ versions as C++ (no version).
321   static lldb::LanguageType GetLanguageFamily(DWARFUnit &unit);
322 
323   lldb_private::StatsDuration::Duration GetDebugInfoParseTime() override {
324     return m_parse_time;
325   }
326   lldb_private::StatsDuration::Duration GetDebugInfoIndexTime() override;
327 
328   lldb_private::StatsDuration &GetDebugInfoParseTimeRef() {
329     return m_parse_time;
330   }
331 
332 protected:
333   typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb_private::Type *>
334       DIEToTypePtr;
335   typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb::VariableSP>
336       DIEToVariableSP;
337   typedef llvm::DenseMap<const DWARFDebugInfoEntry *,
338                          lldb::opaque_compiler_type_t>
339       DIEToClangType;
340   typedef llvm::DenseMap<lldb::opaque_compiler_type_t, DIERef> ClangTypeToDIE;
341 
342   SymbolFileDWARF(const SymbolFileDWARF &) = delete;
343   const SymbolFileDWARF &operator=(const SymbolFileDWARF &) = delete;
344 
345   virtual void LoadSectionData(lldb::SectionType sect_type,
346                                lldb_private::DWARFDataExtractor &data);
347 
348   bool DeclContextMatchesThisSymbolFile(
349       const lldb_private::CompilerDeclContext &decl_ctx);
350 
351   uint32_t CalculateNumCompileUnits() override;
352 
353   lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
354 
355   lldb_private::TypeList &GetTypeList() override;
356 
357   lldb::CompUnitSP ParseCompileUnit(DWARFCompileUnit &dwarf_cu);
358 
359   virtual DWARFCompileUnit *
360   GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit);
361 
362   DWARFUnit *GetNextUnparsedDWARFCompileUnit(DWARFUnit *prev_cu);
363 
364   bool GetFunction(const DWARFDIE &die, lldb_private::SymbolContext &sc);
365 
366   lldb_private::Function *ParseFunction(lldb_private::CompileUnit &comp_unit,
367                                         const DWARFDIE &die);
368 
369   size_t ParseBlocksRecursive(lldb_private::CompileUnit &comp_unit,
370                               lldb_private::Block *parent_block,
371                               const DWARFDIE &die,
372                               lldb::addr_t subprogram_low_pc, uint32_t depth);
373 
374   size_t ParseTypes(const lldb_private::SymbolContext &sc, const DWARFDIE &die,
375                     bool parse_siblings, bool parse_children);
376 
377   lldb::TypeSP ParseType(const lldb_private::SymbolContext &sc,
378                          const DWARFDIE &die, bool *type_is_new);
379 
380   bool ParseSupportFiles(DWARFUnit &dwarf_cu, const lldb::ModuleSP &module,
381                          lldb_private::FileSpecList &support_files);
382 
383   lldb_private::Type *ResolveTypeUID(const DWARFDIE &die,
384                                      bool assert_not_being_parsed);
385 
386   lldb_private::Type *ResolveTypeUID(const DIERef &die_ref);
387 
388   lldb::VariableSP ParseVariableDIE(const lldb_private::SymbolContext &sc,
389                                     const DWARFDIE &die,
390                                     const lldb::addr_t func_low_pc);
391   lldb::VariableSP ParseVariableDIECached(const lldb_private::SymbolContext &sc,
392                                           const DWARFDIE &die);
393 
394   void
395   ParseAndAppendGlobalVariable(const lldb_private::SymbolContext &sc,
396                                const DWARFDIE &die,
397                                lldb_private::VariableList &cc_variable_list);
398 
399   size_t ParseVariablesInFunctionContext(const lldb_private::SymbolContext &sc,
400                                          const DWARFDIE &die,
401                                          const lldb::addr_t func_low_pc);
402 
403   size_t ParseVariablesInFunctionContextRecursive(
404       const lldb_private::SymbolContext &sc, const DWARFDIE &die,
405       lldb::addr_t func_low_pc, DIEArray &accumulator);
406 
407   size_t PopulateBlockVariableList(lldb_private::VariableList &variable_list,
408                                    const lldb_private::SymbolContext &sc,
409                                    llvm::ArrayRef<DIERef> variable_dies,
410                                    lldb::addr_t func_low_pc);
411 
412   DIEArray MergeBlockAbstractParameters(const DWARFDIE &block_die,
413                                         DIEArray &&variable_dies);
414 
415   bool ClassOrStructIsVirtual(const DWARFDIE &die);
416 
417   // Given a die_offset, figure out the symbol context representing that die.
418   bool ResolveFunction(const DWARFDIE &die, bool include_inlines,
419                        lldb_private::SymbolContextList &sc_list);
420 
421   /// Resolve functions and (possibly) blocks for the given file address and a
422   /// compile unit. The compile unit comes from the sc argument and it must be
423   /// set. The results of the lookup (if any) are written back to the symbol
424   /// context.
425   void ResolveFunctionAndBlock(lldb::addr_t file_vm_addr, bool lookup_block,
426                                lldb_private::SymbolContext &sc);
427 
428   virtual lldb::TypeSP
429   FindDefinitionTypeForDWARFDeclContext(const DWARFDeclContext &die_decl_ctx);
430 
431   virtual lldb::TypeSP
432   FindCompleteObjCDefinitionTypeForDIE(const DWARFDIE &die,
433                                        lldb_private::ConstString type_name,
434                                        bool must_be_implementation);
435 
436   lldb_private::Symbol *
437   GetObjCClassSymbol(lldb_private::ConstString objc_class_name);
438 
439   lldb::TypeSP GetTypeForDIE(const DWARFDIE &die,
440                              bool resolve_function_context = false);
441 
442   void SetDebugMapModule(const lldb::ModuleSP &module_sp) {
443     m_debug_map_module_wp = module_sp;
444   }
445 
446   SymbolFileDWARFDebugMap *GetDebugMapSymfile();
447 
448   DWARFDIE
449   FindBlockContainingSpecification(const DIERef &func_die_ref,
450                                    dw_offset_t spec_block_die_offset);
451 
452   DWARFDIE
453   FindBlockContainingSpecification(const DWARFDIE &die,
454                                    dw_offset_t spec_block_die_offset);
455 
456   virtual UniqueDWARFASTTypeMap &GetUniqueDWARFASTTypeMap();
457 
458   bool DIEDeclContextsMatch(const DWARFDIE &die1, const DWARFDIE &die2);
459 
460   bool ClassContainsSelector(const DWARFDIE &class_die,
461                              lldb_private::ConstString selector);
462 
463   /// Parse call site entries (DW_TAG_call_site), including any nested call site
464   /// parameters (DW_TAG_call_site_parameter).
465   std::vector<std::unique_ptr<lldb_private::CallEdge>>
466   CollectCallEdges(lldb::ModuleSP module, DWARFDIE function_die);
467 
468   /// If this symbol file is linked to by a debug map (see
469   /// SymbolFileDWARFDebugMap), and \p file_addr is a file address relative to
470   /// an object file, adjust \p file_addr so that it is relative to the main
471   /// binary. Returns the adjusted address, or \p file_addr if no adjustment is
472   /// needed, on success and LLDB_INVALID_ADDRESS otherwise.
473   lldb::addr_t FixupAddress(lldb::addr_t file_addr);
474 
475   bool FixupAddress(lldb_private::Address &addr);
476 
477   typedef llvm::SetVector<lldb_private::Type *> TypeSet;
478 
479   void GetTypes(const DWARFDIE &die, dw_offset_t min_die_offset,
480                 dw_offset_t max_die_offset, uint32_t type_mask,
481                 TypeSet &type_set);
482 
483   typedef lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t,
484                                         lldb_private::Variable *>
485       GlobalVariableMap;
486 
487   GlobalVariableMap &GetGlobalAranges();
488 
489   void UpdateExternalModuleListIfNeeded();
490 
491   virtual DIEToTypePtr &GetDIEToType() { return m_die_to_type; }
492 
493   virtual DIEToVariableSP &GetDIEToVariable() { return m_die_to_variable_sp; }
494 
495   virtual DIEToClangType &GetForwardDeclDieToClangType() {
496     return m_forward_decl_die_to_clang_type;
497   }
498 
499   virtual ClangTypeToDIE &GetForwardDeclClangTypeToDie() {
500     return m_forward_decl_clang_type_to_die;
501   }
502 
503   void BuildCuTranslationTable();
504   llvm::Optional<uint32_t> GetDWARFUnitIndex(uint32_t cu_idx);
505 
506   struct DecodedUID {
507     SymbolFileDWARF &dwarf;
508     DIERef ref;
509   };
510   llvm::Optional<DecodedUID> DecodeUID(lldb::user_id_t uid);
511 
512   void FindDwpSymbolFile();
513 
514   const lldb_private::FileSpecList &GetTypeUnitSupportFiles(DWARFTypeUnit &tu);
515 
516   void InitializeFirstCodeAddressRecursive(
517       const lldb_private::SectionList &section_list);
518 
519   void InitializeFirstCodeAddress();
520 
521   lldb::ModuleWP m_debug_map_module_wp;
522   SymbolFileDWARFDebugMap *m_debug_map_symfile;
523 
524   llvm::once_flag m_dwp_symfile_once_flag;
525   std::shared_ptr<SymbolFileDWARFDwo> m_dwp_symfile;
526 
527   lldb_private::DWARFContext m_context;
528 
529   llvm::once_flag m_info_once_flag;
530   std::unique_ptr<DWARFDebugInfo> m_info;
531 
532   std::unique_ptr<DWARFDebugAbbrev> m_abbr;
533   std::unique_ptr<GlobalVariableMap> m_global_aranges_up;
534 
535   typedef std::unordered_map<lldb::offset_t, lldb_private::DebugMacrosSP>
536       DebugMacrosMap;
537   DebugMacrosMap m_debug_macros_map;
538 
539   ExternalTypeModuleMap m_external_type_modules;
540   std::unique_ptr<lldb_private::DWARFIndex> m_index;
541   bool m_fetched_external_modules : 1;
542   lldb_private::LazyBool m_supports_DW_AT_APPLE_objc_complete_type;
543 
544   typedef std::set<DIERef> DIERefSet;
545   typedef llvm::StringMap<DIERefSet> NameToOffsetMap;
546   NameToOffsetMap m_function_scope_qualified_name_map;
547   std::unique_ptr<DWARFDebugRanges> m_ranges;
548   UniqueDWARFASTTypeMap m_unique_ast_type_map;
549   DIEToTypePtr m_die_to_type;
550   DIEToVariableSP m_die_to_variable_sp;
551   DIEToClangType m_forward_decl_die_to_clang_type;
552   ClangTypeToDIE m_forward_decl_clang_type_to_die;
553   llvm::DenseMap<dw_offset_t, lldb_private::FileSpecList>
554       m_type_unit_support_files;
555   std::vector<uint32_t> m_lldb_cu_to_dwarf_unit;
556   /// DWARF does not provide a good way for traditional (concatenating) linkers
557   /// to invalidate debug info describing dead-stripped code. These linkers will
558   /// keep the debug info but resolve any addresses referring to such code as
559   /// zero (BFD) or a small positive integer (zero + relocation addend -- GOLD).
560   /// Try to filter out this debug info by comparing it to the lowest code
561   /// address in the module.
562   lldb::addr_t m_first_code_address = LLDB_INVALID_ADDRESS;
563   lldb_private::StatsDuration m_parse_time;
564   std::atomic_flag m_dwo_warning_issued = ATOMIC_FLAG_INIT;
565 };
566 
567 #endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_SYMBOLFILEDWARF_H
568