1 //===-- SymbolFileDWARF.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 "SymbolFileDWARF.h"
11 
12 // Other libraries and framework includes
13 #include "clang/AST/ASTConsumer.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/DeclGroup.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/Basic/Builtins.h"
20 #include "clang/Basic/IdentifierTable.h"
21 #include "clang/Basic/LangOptions.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "clang/Basic/TargetInfo.h"
24 #include "clang/Basic/Specifiers.h"
25 #include "clang/Sema/DeclSpec.h"
26 
27 #include "llvm/Support/Casting.h"
28 
29 #include "lldb/Core/Module.h"
30 #include "lldb/Core/PluginManager.h"
31 #include "lldb/Core/RegularExpression.h"
32 #include "lldb/Core/Scalar.h"
33 #include "lldb/Core/Section.h"
34 #include "lldb/Core/StreamFile.h"
35 #include "lldb/Core/StreamString.h"
36 #include "lldb/Core/Timer.h"
37 #include "lldb/Core/Value.h"
38 
39 #include "lldb/Host/Host.h"
40 
41 #include "lldb/Symbol/Block.h"
42 #include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
43 #include "lldb/Symbol/CompileUnit.h"
44 #include "lldb/Symbol/LineTable.h"
45 #include "lldb/Symbol/ObjectFile.h"
46 #include "lldb/Symbol/SymbolVendor.h"
47 #include "lldb/Symbol/VariableList.h"
48 
49 #include "lldb/Target/ObjCLanguageRuntime.h"
50 #include "lldb/Target/CPPLanguageRuntime.h"
51 
52 #include "DWARFCompileUnit.h"
53 #include "DWARFDebugAbbrev.h"
54 #include "DWARFDebugAranges.h"
55 #include "DWARFDebugInfo.h"
56 #include "DWARFDebugInfoEntry.h"
57 #include "DWARFDebugLine.h"
58 #include "DWARFDebugPubnames.h"
59 #include "DWARFDebugRanges.h"
60 #include "DWARFDeclContext.h"
61 #include "DWARFDIECollection.h"
62 #include "DWARFFormValue.h"
63 #include "DWARFLocationList.h"
64 #include "LogChannelDWARF.h"
65 #include "SymbolFileDWARFDebugMap.h"
66 
67 #include <map>
68 
69 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
70 
71 #ifdef ENABLE_DEBUG_PRINTF
72 #include <stdio.h>
73 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
74 #else
75 #define DEBUG_PRINTF(fmt, ...)
76 #endif
77 
78 #define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
79 
80 using namespace lldb;
81 using namespace lldb_private;
82 
83 //static inline bool
84 //child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
85 //{
86 //    switch (tag)
87 //    {
88 //    default:
89 //        break;
90 //    case DW_TAG_subprogram:
91 //    case DW_TAG_inlined_subroutine:
92 //    case DW_TAG_class_type:
93 //    case DW_TAG_structure_type:
94 //    case DW_TAG_union_type:
95 //        return true;
96 //    }
97 //    return false;
98 //}
99 //
100 static AccessType
101 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
102 {
103     switch (dwarf_accessibility)
104     {
105         case DW_ACCESS_public:      return eAccessPublic;
106         case DW_ACCESS_private:     return eAccessPrivate;
107         case DW_ACCESS_protected:   return eAccessProtected;
108         default:                    break;
109     }
110     return eAccessNone;
111 }
112 
113 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
114 
115 class DIEStack
116 {
117 public:
118 
119     void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
120     {
121         m_dies.push_back (DIEInfo(cu, die));
122     }
123 
124 
125     void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
126     {
127         StreamString log_strm;
128         const size_t n = m_dies.size();
129         log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
130         for (size_t i=0; i<n; i++)
131         {
132             DWARFCompileUnit *cu = m_dies[i].cu;
133             const DWARFDebugInfoEntry *die = m_dies[i].die;
134             std::string qualified_name;
135             die->GetQualifiedName(dwarf, cu, qualified_name);
136             log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
137                              (uint64_t)i,
138                              die->GetOffset(),
139                              DW_TAG_value_to_name(die->Tag()),
140                              qualified_name.c_str());
141         }
142         log->PutCString(log_strm.GetData());
143     }
144     void Pop ()
145     {
146         m_dies.pop_back();
147     }
148 
149     class ScopedPopper
150     {
151     public:
152         ScopedPopper (DIEStack &die_stack) :
153             m_die_stack (die_stack),
154             m_valid (false)
155         {
156         }
157 
158         void
159         Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
160         {
161             m_valid = true;
162             m_die_stack.Push (cu, die);
163         }
164 
165         ~ScopedPopper ()
166         {
167             if (m_valid)
168                 m_die_stack.Pop();
169         }
170 
171 
172 
173     protected:
174         DIEStack &m_die_stack;
175         bool m_valid;
176     };
177 
178 protected:
179     struct DIEInfo {
180         DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
181             cu(c),
182             die(d)
183         {
184         }
185         DWARFCompileUnit *cu;
186         const DWARFDebugInfoEntry *die;
187     };
188     typedef std::vector<DIEInfo> Stack;
189     Stack m_dies;
190 };
191 #endif
192 
193 void
194 SymbolFileDWARF::Initialize()
195 {
196     LogChannelDWARF::Initialize();
197     PluginManager::RegisterPlugin (GetPluginNameStatic(),
198                                    GetPluginDescriptionStatic(),
199                                    CreateInstance);
200 }
201 
202 void
203 SymbolFileDWARF::Terminate()
204 {
205     PluginManager::UnregisterPlugin (CreateInstance);
206     LogChannelDWARF::Initialize();
207 }
208 
209 
210 lldb_private::ConstString
211 SymbolFileDWARF::GetPluginNameStatic()
212 {
213     static ConstString g_name("dwarf");
214     return g_name;
215 }
216 
217 const char *
218 SymbolFileDWARF::GetPluginDescriptionStatic()
219 {
220     return "DWARF and DWARF3 debug symbol file reader.";
221 }
222 
223 
224 SymbolFile*
225 SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
226 {
227     return new SymbolFileDWARF(obj_file);
228 }
229 
230 TypeList *
231 SymbolFileDWARF::GetTypeList ()
232 {
233     if (GetDebugMapSymfile ())
234         return m_debug_map_symfile->GetTypeList();
235     return m_obj_file->GetModule()->GetTypeList();
236 
237 }
238 void
239 SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
240                            const DWARFDebugInfoEntry *die,
241                            dw_offset_t min_die_offset,
242                            dw_offset_t max_die_offset,
243                            uint32_t type_mask,
244                            TypeSet &type_set)
245 {
246     if (cu)
247     {
248         if (die)
249         {
250             const dw_offset_t die_offset = die->GetOffset();
251 
252             if (die_offset >= max_die_offset)
253                 return;
254 
255             if (die_offset >= min_die_offset)
256             {
257                 const dw_tag_t tag = die->Tag();
258 
259                 bool add_type = false;
260 
261                 switch (tag)
262                 {
263                     case DW_TAG_array_type:         add_type = (type_mask & eTypeClassArray         ) != 0; break;
264                     case DW_TAG_unspecified_type:
265                     case DW_TAG_base_type:          add_type = (type_mask & eTypeClassBuiltin       ) != 0; break;
266                     case DW_TAG_class_type:         add_type = (type_mask & eTypeClassClass         ) != 0; break;
267                     case DW_TAG_structure_type:     add_type = (type_mask & eTypeClassStruct        ) != 0; break;
268                     case DW_TAG_union_type:         add_type = (type_mask & eTypeClassUnion         ) != 0; break;
269                     case DW_TAG_enumeration_type:   add_type = (type_mask & eTypeClassEnumeration   ) != 0; break;
270                     case DW_TAG_subroutine_type:
271                     case DW_TAG_subprogram:
272                     case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction      ) != 0; break;
273                     case DW_TAG_pointer_type:       add_type = (type_mask & eTypeClassPointer       ) != 0; break;
274                     case DW_TAG_rvalue_reference_type:
275                     case DW_TAG_reference_type:     add_type = (type_mask & eTypeClassReference     ) != 0; break;
276                     case DW_TAG_typedef:            add_type = (type_mask & eTypeClassTypedef       ) != 0; break;
277                     case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
278                 }
279 
280                 if (add_type)
281                 {
282                     const bool assert_not_being_parsed = true;
283                     Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
284                     if (type)
285                     {
286                         if (type_set.find(type) == type_set.end())
287                             type_set.insert(type);
288                     }
289                 }
290             }
291 
292             for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
293                  child_die != NULL;
294                  child_die = child_die->GetSibling())
295             {
296                 GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
297             }
298         }
299     }
300 }
301 
302 size_t
303 SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
304                            uint32_t type_mask,
305                            TypeList &type_list)
306 
307 {
308     TypeSet type_set;
309 
310     CompileUnit *comp_unit = NULL;
311     DWARFCompileUnit* dwarf_cu = NULL;
312     if (sc_scope)
313         comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
314 
315     if (comp_unit)
316     {
317         dwarf_cu = GetDWARFCompileUnit(comp_unit);
318         if (dwarf_cu == 0)
319             return 0;
320         GetTypes (dwarf_cu,
321                   dwarf_cu->DIE(),
322                   dwarf_cu->GetOffset(),
323                   dwarf_cu->GetNextCompileUnitOffset(),
324                   type_mask,
325                   type_set);
326     }
327     else
328     {
329         DWARFDebugInfo* info = DebugInfo();
330         if (info)
331         {
332             const size_t num_cus = info->GetNumCompileUnits();
333             for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
334             {
335                 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
336                 if (dwarf_cu)
337                 {
338                     GetTypes (dwarf_cu,
339                               dwarf_cu->DIE(),
340                               0,
341                               UINT32_MAX,
342                               type_mask,
343                               type_set);
344                 }
345             }
346         }
347     }
348 //    if (m_using_apple_tables)
349 //    {
350 //        DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
351 //        if (apple_types)
352 //        {
353 //            apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
354 //
355 //                for (auto die_info: die_info_array)
356 //                {
357 //                    bool add_type = TagMatchesTypeMask (type_mask, 0);
358 //                    if (!add_type)
359 //                    {
360 //                        dw_tag_t tag = die_info.tag;
361 //                        if (tag == 0)
362 //                        {
363 //                            const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
364 //                            tag = die->Tag();
365 //                        }
366 //                        add_type = TagMatchesTypeMask (type_mask, tag);
367 //                    }
368 //                    if (add_type)
369 //                    {
370 //                        Type *type = ResolveTypeUID(die_info.offset);
371 //
372 //                        if (type_set.find(type) == type_set.end())
373 //                            type_set.insert(type);
374 //                    }
375 //                }
376 //                return true; // Keep iterating
377 //            });
378 //        }
379 //    }
380 //    else
381 //    {
382 //        if (!m_indexed)
383 //            Index ();
384 //
385 //        m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
386 //
387 //            bool add_type = TagMatchesTypeMask (type_mask, 0);
388 //
389 //            if (!add_type)
390 //            {
391 //                const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
392 //                if (die)
393 //                {
394 //                    const dw_tag_t tag = die->Tag();
395 //                    add_type = TagMatchesTypeMask (type_mask, tag);
396 //                }
397 //            }
398 //
399 //            if (add_type)
400 //            {
401 //                Type *type = ResolveTypeUID(die_offset);
402 //
403 //                if (type_set.find(type) == type_set.end())
404 //                    type_set.insert(type);
405 //            }
406 //            return true; // Keep iterating
407 //        });
408 //    }
409 
410     std::set<ClangASTType> clang_type_set;
411     size_t num_types_added = 0;
412     for (Type *type : type_set)
413     {
414         ClangASTType clang_type = type->GetClangForwardType();
415         if (clang_type_set.find(clang_type) == clang_type_set.end())
416         {
417             clang_type_set.insert(clang_type);
418             type_list.Insert (type->shared_from_this());
419             ++num_types_added;
420         }
421     }
422     return num_types_added;
423 }
424 
425 
426 //----------------------------------------------------------------------
427 // Gets the first parent that is a lexical block, function or inlined
428 // subroutine, or compile unit.
429 //----------------------------------------------------------------------
430 static const DWARFDebugInfoEntry *
431 GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
432 {
433     const DWARFDebugInfoEntry *die;
434     for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
435     {
436         dw_tag_t tag = die->Tag();
437 
438         switch (tag)
439         {
440         case DW_TAG_compile_unit:
441         case DW_TAG_subprogram:
442         case DW_TAG_inlined_subroutine:
443         case DW_TAG_lexical_block:
444             return die;
445         }
446     }
447     return NULL;
448 }
449 
450 
451 SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
452     SymbolFile (objfile),
453     UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
454     m_debug_map_module_wp (),
455     m_debug_map_symfile (NULL),
456     m_clang_tu_decl (NULL),
457     m_flags(),
458     m_data_debug_abbrev (),
459     m_data_debug_aranges (),
460     m_data_debug_frame (),
461     m_data_debug_info (),
462     m_data_debug_line (),
463     m_data_debug_loc (),
464     m_data_debug_ranges (),
465     m_data_debug_str (),
466     m_data_apple_names (),
467     m_data_apple_types (),
468     m_data_apple_namespaces (),
469     m_abbr(),
470     m_info(),
471     m_line(),
472     m_apple_names_ap (),
473     m_apple_types_ap (),
474     m_apple_namespaces_ap (),
475     m_apple_objc_ap (),
476     m_function_basename_index(),
477     m_function_fullname_index(),
478     m_function_method_index(),
479     m_function_selector_index(),
480     m_objc_class_selectors_index(),
481     m_global_index(),
482     m_type_index(),
483     m_namespace_index(),
484     m_indexed (false),
485     m_is_external_ast_source (false),
486     m_using_apple_tables (false),
487     m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
488     m_ranges(),
489     m_unique_ast_type_map ()
490 {
491 }
492 
493 SymbolFileDWARF::~SymbolFileDWARF()
494 {
495     if (m_is_external_ast_source)
496     {
497         ModuleSP module_sp (m_obj_file->GetModule());
498         if (module_sp)
499             module_sp->GetClangASTContext().RemoveExternalSource ();
500     }
501 }
502 
503 static const ConstString &
504 GetDWARFMachOSegmentName ()
505 {
506     static ConstString g_dwarf_section_name ("__DWARF");
507     return g_dwarf_section_name;
508 }
509 
510 UniqueDWARFASTTypeMap &
511 SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
512 {
513     if (GetDebugMapSymfile ())
514         return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
515     return m_unique_ast_type_map;
516 }
517 
518 ClangASTContext &
519 SymbolFileDWARF::GetClangASTContext ()
520 {
521     if (GetDebugMapSymfile ())
522         return m_debug_map_symfile->GetClangASTContext ();
523 
524     ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
525     if (!m_is_external_ast_source)
526     {
527         m_is_external_ast_source = true;
528         llvm::OwningPtr<clang::ExternalASTSource> ast_source_ap (
529             new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
530                                                  SymbolFileDWARF::CompleteObjCInterfaceDecl,
531                                                  SymbolFileDWARF::FindExternalVisibleDeclsByName,
532                                                  SymbolFileDWARF::LayoutRecordType,
533                                                  this));
534         ast.SetExternalSource (ast_source_ap);
535     }
536     return ast;
537 }
538 
539 void
540 SymbolFileDWARF::InitializeObject()
541 {
542     // Install our external AST source callbacks so we can complete Clang types.
543     ModuleSP module_sp (m_obj_file->GetModule());
544     if (module_sp)
545     {
546         const SectionList *section_list = module_sp->GetSectionList();
547 
548         const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
549 
550         // Memory map the DWARF mach-o segment so we have everything mmap'ed
551         // to keep our heap memory usage down.
552         if (section)
553             m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
554     }
555     get_apple_names_data();
556     if (m_data_apple_names.GetByteSize() > 0)
557     {
558         m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
559         if (m_apple_names_ap->IsValid())
560             m_using_apple_tables = true;
561         else
562             m_apple_names_ap.reset();
563     }
564     get_apple_types_data();
565     if (m_data_apple_types.GetByteSize() > 0)
566     {
567         m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
568         if (m_apple_types_ap->IsValid())
569             m_using_apple_tables = true;
570         else
571             m_apple_types_ap.reset();
572     }
573 
574     get_apple_namespaces_data();
575     if (m_data_apple_namespaces.GetByteSize() > 0)
576     {
577         m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
578         if (m_apple_namespaces_ap->IsValid())
579             m_using_apple_tables = true;
580         else
581             m_apple_namespaces_ap.reset();
582     }
583 
584     get_apple_objc_data();
585     if (m_data_apple_objc.GetByteSize() > 0)
586     {
587         m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
588         if (m_apple_objc_ap->IsValid())
589             m_using_apple_tables = true;
590         else
591             m_apple_objc_ap.reset();
592     }
593 }
594 
595 bool
596 SymbolFileDWARF::SupportedVersion(uint16_t version)
597 {
598     return version == 2 || version == 3 || version == 4;
599 }
600 
601 uint32_t
602 SymbolFileDWARF::CalculateAbilities ()
603 {
604     uint32_t abilities = 0;
605     if (m_obj_file != NULL)
606     {
607         const Section* section = NULL;
608         const SectionList *section_list = m_obj_file->GetSectionList();
609         if (section_list == NULL)
610             return 0;
611 
612         uint64_t debug_abbrev_file_size = 0;
613         uint64_t debug_info_file_size = 0;
614         uint64_t debug_line_file_size = 0;
615 
616         section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
617 
618         if (section)
619             section_list = &section->GetChildren ();
620 
621         section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
622         if (section != NULL)
623         {
624             debug_info_file_size = section->GetFileSize();
625 
626             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
627             if (section)
628                 debug_abbrev_file_size = section->GetFileSize();
629             else
630                 m_flags.Set (flagsGotDebugAbbrevData);
631 
632             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
633             if (!section)
634                 m_flags.Set (flagsGotDebugArangesData);
635 
636             section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
637             if (!section)
638                 m_flags.Set (flagsGotDebugFrameData);
639 
640             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
641             if (section)
642                 debug_line_file_size = section->GetFileSize();
643             else
644                 m_flags.Set (flagsGotDebugLineData);
645 
646             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
647             if (!section)
648                 m_flags.Set (flagsGotDebugLocData);
649 
650             section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
651             if (!section)
652                 m_flags.Set (flagsGotDebugMacInfoData);
653 
654             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
655             if (!section)
656                 m_flags.Set (flagsGotDebugPubNamesData);
657 
658             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
659             if (!section)
660                 m_flags.Set (flagsGotDebugPubTypesData);
661 
662             section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
663             if (!section)
664                 m_flags.Set (flagsGotDebugRangesData);
665 
666             section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
667             if (!section)
668                 m_flags.Set (flagsGotDebugStrData);
669         }
670         else
671         {
672             const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
673             if (symfile_dir_cstr)
674             {
675                 if (strcasestr(symfile_dir_cstr, ".dsym"))
676                 {
677                     if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
678                     {
679                         // We have a dSYM file that didn't have a any debug info.
680                         // If the string table has a size of 1, then it was made from
681                         // an executable with no debug info, or from an executable that
682                         // was stripped.
683                         section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
684                         if (section && section->GetFileSize() == 1)
685                         {
686                             m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
687                         }
688                     }
689                 }
690             }
691         }
692 
693         if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
694             abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
695 
696         if (debug_line_file_size > 0)
697             abilities |= LineTables;
698     }
699     return abilities;
700 }
701 
702 const DWARFDataExtractor&
703 SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
704 {
705     if (m_flags.IsClear (got_flag))
706     {
707         ModuleSP module_sp (m_obj_file->GetModule());
708         m_flags.Set (got_flag);
709         const SectionList *section_list = module_sp->GetSectionList();
710         if (section_list)
711         {
712             SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
713             if (section_sp)
714             {
715                 // See if we memory mapped the DWARF segment?
716                 if (m_dwarf_data.GetByteSize())
717                 {
718                     data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
719                 }
720                 else
721                 {
722                     if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
723                         data.Clear();
724                 }
725             }
726         }
727     }
728     return data;
729 }
730 
731 const DWARFDataExtractor&
732 SymbolFileDWARF::get_debug_abbrev_data()
733 {
734     return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
735 }
736 
737 const DWARFDataExtractor&
738 SymbolFileDWARF::get_debug_aranges_data()
739 {
740     return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
741 }
742 
743 const DWARFDataExtractor&
744 SymbolFileDWARF::get_debug_frame_data()
745 {
746     return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
747 }
748 
749 const DWARFDataExtractor&
750 SymbolFileDWARF::get_debug_info_data()
751 {
752     return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
753 }
754 
755 const DWARFDataExtractor&
756 SymbolFileDWARF::get_debug_line_data()
757 {
758     return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
759 }
760 
761 const DWARFDataExtractor&
762 SymbolFileDWARF::get_debug_loc_data()
763 {
764     return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
765 }
766 
767 const DWARFDataExtractor&
768 SymbolFileDWARF::get_debug_ranges_data()
769 {
770     return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
771 }
772 
773 const DWARFDataExtractor&
774 SymbolFileDWARF::get_debug_str_data()
775 {
776     return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
777 }
778 
779 const DWARFDataExtractor&
780 SymbolFileDWARF::get_apple_names_data()
781 {
782     return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
783 }
784 
785 const DWARFDataExtractor&
786 SymbolFileDWARF::get_apple_types_data()
787 {
788     return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
789 }
790 
791 const DWARFDataExtractor&
792 SymbolFileDWARF::get_apple_namespaces_data()
793 {
794     return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
795 }
796 
797 const DWARFDataExtractor&
798 SymbolFileDWARF::get_apple_objc_data()
799 {
800     return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
801 }
802 
803 
804 DWARFDebugAbbrev*
805 SymbolFileDWARF::DebugAbbrev()
806 {
807     if (m_abbr.get() == NULL)
808     {
809         const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
810         if (debug_abbrev_data.GetByteSize() > 0)
811         {
812             m_abbr.reset(new DWARFDebugAbbrev());
813             if (m_abbr.get())
814                 m_abbr->Parse(debug_abbrev_data);
815         }
816     }
817     return m_abbr.get();
818 }
819 
820 const DWARFDebugAbbrev*
821 SymbolFileDWARF::DebugAbbrev() const
822 {
823     return m_abbr.get();
824 }
825 
826 
827 DWARFDebugInfo*
828 SymbolFileDWARF::DebugInfo()
829 {
830     if (m_info.get() == NULL)
831     {
832         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
833         if (get_debug_info_data().GetByteSize() > 0)
834         {
835             m_info.reset(new DWARFDebugInfo());
836             if (m_info.get())
837             {
838                 m_info->SetDwarfData(this);
839             }
840         }
841     }
842     return m_info.get();
843 }
844 
845 const DWARFDebugInfo*
846 SymbolFileDWARF::DebugInfo() const
847 {
848     return m_info.get();
849 }
850 
851 DWARFCompileUnit*
852 SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
853 {
854     DWARFDebugInfo* info = DebugInfo();
855     if (info)
856     {
857         if (GetDebugMapSymfile ())
858         {
859             // The debug map symbol file made the compile units for this DWARF
860             // file which is .o file with DWARF in it, and we should have
861             // only 1 compile unit which is at offset zero in the DWARF.
862             // TODO: modify to support LTO .o files where each .o file might
863             // have multiple DW_TAG_compile_unit tags.
864             return info->GetCompileUnit(0).get();
865         }
866         else
867         {
868             // Just a normal DWARF file whose user ID for the compile unit is
869             // the DWARF offset itself
870             return info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
871         }
872     }
873     return NULL;
874 }
875 
876 
877 DWARFDebugRanges*
878 SymbolFileDWARF::DebugRanges()
879 {
880     if (m_ranges.get() == NULL)
881     {
882         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
883         if (get_debug_ranges_data().GetByteSize() > 0)
884         {
885             m_ranges.reset(new DWARFDebugRanges());
886             if (m_ranges.get())
887                 m_ranges->Extract(this);
888         }
889     }
890     return m_ranges.get();
891 }
892 
893 const DWARFDebugRanges*
894 SymbolFileDWARF::DebugRanges() const
895 {
896     return m_ranges.get();
897 }
898 
899 lldb::CompUnitSP
900 SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
901 {
902     CompUnitSP cu_sp;
903     if (dwarf_cu)
904     {
905         CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
906         if (comp_unit)
907         {
908             // We already parsed this compile unit, had out a shared pointer to it
909             cu_sp = comp_unit->shared_from_this();
910         }
911         else
912         {
913             if (GetDebugMapSymfile ())
914             {
915                 // Let the debug map create the compile unit
916                 cu_sp = m_debug_map_symfile->GetCompileUnit(this);
917                 dwarf_cu->SetUserData(cu_sp.get());
918             }
919             else
920             {
921                 ModuleSP module_sp (m_obj_file->GetModule());
922                 if (module_sp)
923                 {
924                     const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
925                     if (cu_die)
926                     {
927                         const char * cu_die_name = cu_die->GetName(this, dwarf_cu);
928                         const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
929                         LanguageType cu_language = (LanguageType)cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
930                         if (cu_die_name)
931                         {
932                             std::string ramapped_file;
933                             FileSpec cu_file_spec;
934 
935                             if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
936                             {
937                                 // If we have a full path to the compile unit, we don't need to resolve
938                                 // the file.  This can be expensive e.g. when the source files are NFS mounted.
939                                 if (module_sp->RemapSourceFile(cu_die_name, ramapped_file))
940                                     cu_file_spec.SetFile (ramapped_file.c_str(), false);
941                                 else
942                                     cu_file_spec.SetFile (cu_die_name, false);
943                             }
944                             else
945                             {
946                                 std::string fullpath(cu_comp_dir);
947                                 if (*fullpath.rbegin() != '/')
948                                     fullpath += '/';
949                                 fullpath += cu_die_name;
950                                 if (module_sp->RemapSourceFile (fullpath.c_str(), ramapped_file))
951                                     cu_file_spec.SetFile (ramapped_file.c_str(), false);
952                                 else
953                                     cu_file_spec.SetFile (fullpath.c_str(), false);
954                             }
955 
956                             cu_sp.reset(new CompileUnit (module_sp,
957                                                          dwarf_cu,
958                                                          cu_file_spec,
959                                                          MakeUserID(dwarf_cu->GetOffset()),
960                                                          cu_language));
961                             if (cu_sp)
962                             {
963                                 dwarf_cu->SetUserData(cu_sp.get());
964 
965                                 // Figure out the compile unit index if we weren't given one
966                                 if (cu_idx == UINT32_MAX)
967                                     DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
968 
969                                 m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
970                             }
971                         }
972                     }
973                 }
974             }
975         }
976     }
977     return cu_sp;
978 }
979 
980 uint32_t
981 SymbolFileDWARF::GetNumCompileUnits()
982 {
983     DWARFDebugInfo* info = DebugInfo();
984     if (info)
985         return info->GetNumCompileUnits();
986     return 0;
987 }
988 
989 CompUnitSP
990 SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
991 {
992     CompUnitSP cu_sp;
993     DWARFDebugInfo* info = DebugInfo();
994     if (info)
995     {
996         DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
997         if (dwarf_cu)
998             cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
999     }
1000     return cu_sp;
1001 }
1002 
1003 static void
1004 AddRangesToBlock (Block& block,
1005                   DWARFDebugRanges::RangeList& ranges,
1006                   addr_t block_base_addr)
1007 {
1008     const size_t num_ranges = ranges.GetSize();
1009     for (size_t i = 0; i<num_ranges; ++i)
1010     {
1011         const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
1012         const addr_t range_base = range.GetRangeBase();
1013         assert (range_base >= block_base_addr);
1014         block.AddRange(Block::Range (range_base - block_base_addr, range.GetByteSize()));;
1015     }
1016     block.FinalizeRanges ();
1017 }
1018 
1019 
1020 Function *
1021 SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
1022 {
1023     DWARFDebugRanges::RangeList func_ranges;
1024     const char *name = NULL;
1025     const char *mangled = NULL;
1026     int decl_file = 0;
1027     int decl_line = 0;
1028     int decl_column = 0;
1029     int call_file = 0;
1030     int call_line = 0;
1031     int call_column = 0;
1032     DWARFExpression frame_base;
1033 
1034     assert (die->Tag() == DW_TAG_subprogram);
1035 
1036     if (die->Tag() != DW_TAG_subprogram)
1037         return NULL;
1038 
1039     if (die->GetDIENamesAndRanges (this,
1040                                    dwarf_cu,
1041                                    name,
1042                                    mangled,
1043                                    func_ranges,
1044                                    decl_file,
1045                                    decl_line,
1046                                    decl_column,
1047                                    call_file,
1048                                    call_line,
1049                                    call_column,
1050                                    &frame_base))
1051     {
1052         // Union of all ranges in the function DIE (if the function is discontiguous)
1053         AddressRange func_range;
1054         lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
1055         lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
1056         if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
1057         {
1058             ModuleSP module_sp (m_obj_file->GetModule());
1059             func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
1060             if (func_range.GetBaseAddress().IsValid())
1061                 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1062         }
1063 
1064         if (func_range.GetBaseAddress().IsValid())
1065         {
1066             Mangled func_name;
1067             if (mangled)
1068                 func_name.SetValue(ConstString(mangled), true);
1069             else if (name)
1070                 func_name.SetValue(ConstString(name), false);
1071 
1072             FunctionSP func_sp;
1073             std::unique_ptr<Declaration> decl_ap;
1074             if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1075                 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1076                                                decl_line,
1077                                                decl_column));
1078 
1079             // Supply the type _only_ if it has already been parsed
1080             Type *func_type = m_die_to_type.lookup (die);
1081 
1082             assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1083 
1084             if (FixupAddress (func_range.GetBaseAddress()))
1085             {
1086                 const user_id_t func_user_id = MakeUserID(die->GetOffset());
1087                 func_sp.reset(new Function (sc.comp_unit,
1088                                             MakeUserID(func_user_id),       // UserID is the DIE offset
1089                                             MakeUserID(func_user_id),
1090                                             func_name,
1091                                             func_type,
1092                                             func_range));           // first address range
1093 
1094                 if (func_sp.get() != NULL)
1095                 {
1096                     if (frame_base.IsValid())
1097                         func_sp->GetFrameBaseExpression() = frame_base;
1098                     sc.comp_unit->AddFunction(func_sp);
1099                     return func_sp.get();
1100                 }
1101             }
1102         }
1103     }
1104     return NULL;
1105 }
1106 
1107 bool
1108 SymbolFileDWARF::FixupAddress (Address &addr)
1109 {
1110     SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1111     if (debug_map_symfile)
1112     {
1113         return debug_map_symfile->LinkOSOAddress(addr);
1114     }
1115     // This is a normal DWARF file, no address fixups need to happen
1116     return true;
1117 }
1118 lldb::LanguageType
1119 SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1120 {
1121     assert (sc.comp_unit);
1122     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1123     if (dwarf_cu)
1124     {
1125         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1126         if (die)
1127         {
1128             const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
1129             if (language)
1130                 return (lldb::LanguageType)language;
1131         }
1132     }
1133     return eLanguageTypeUnknown;
1134 }
1135 
1136 size_t
1137 SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1138 {
1139     assert (sc.comp_unit);
1140     size_t functions_added = 0;
1141     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1142     if (dwarf_cu)
1143     {
1144         DWARFDIECollection function_dies;
1145         const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1146         size_t func_idx;
1147         for (func_idx = 0; func_idx < num_functions; ++func_idx)
1148         {
1149             const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1150             if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1151             {
1152                 if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1153                     ++functions_added;
1154             }
1155         }
1156         //FixupTypes();
1157     }
1158     return functions_added;
1159 }
1160 
1161 bool
1162 SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1163 {
1164     assert (sc.comp_unit);
1165     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1166     if (dwarf_cu)
1167     {
1168         const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1169 
1170         if (cu_die)
1171         {
1172             const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1173             dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1174 
1175             // All file indexes in DWARF are one based and a file of index zero is
1176             // supposed to be the compile unit itself.
1177             support_files.Append (*sc.comp_unit);
1178 
1179             return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1180         }
1181     }
1182     return false;
1183 }
1184 
1185 struct ParseDWARFLineTableCallbackInfo
1186 {
1187     LineTable* line_table;
1188     std::unique_ptr<LineSequence> sequence_ap;
1189 };
1190 
1191 //----------------------------------------------------------------------
1192 // ParseStatementTableCallback
1193 //----------------------------------------------------------------------
1194 static void
1195 ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1196 {
1197     if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1198     {
1199         // Just started parsing the line table
1200     }
1201     else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1202     {
1203         // Done parsing line table, nothing to do for the cleanup
1204     }
1205     else
1206     {
1207         ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1208         LineTable* line_table = info->line_table;
1209 
1210         // If this is our first time here, we need to create a
1211         // sequence container.
1212         if (!info->sequence_ap.get())
1213         {
1214             info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1215             assert(info->sequence_ap.get());
1216         }
1217         line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1218                                                state.address,
1219                                                state.line,
1220                                                state.column,
1221                                                state.file,
1222                                                state.is_stmt,
1223                                                state.basic_block,
1224                                                state.prologue_end,
1225                                                state.epilogue_begin,
1226                                                state.end_sequence);
1227         if (state.end_sequence)
1228         {
1229             // First, put the current sequence into the line table.
1230             line_table->InsertSequence(info->sequence_ap.get());
1231             // Then, empty it to prepare for the next sequence.
1232             info->sequence_ap->Clear();
1233         }
1234     }
1235 }
1236 
1237 bool
1238 SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1239 {
1240     assert (sc.comp_unit);
1241     if (sc.comp_unit->GetLineTable() != NULL)
1242         return true;
1243 
1244     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1245     if (dwarf_cu)
1246     {
1247         const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1248         if (dwarf_cu_die)
1249         {
1250             const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1251             if (cu_line_offset != DW_INVALID_OFFSET)
1252             {
1253                 std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1254                 if (line_table_ap.get())
1255                 {
1256                     ParseDWARFLineTableCallbackInfo info;
1257                     info.line_table = line_table_ap.get();
1258                     lldb::offset_t offset = cu_line_offset;
1259                     DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1260                     if (m_debug_map_symfile)
1261                     {
1262                         // We have an object file that has a line table with addresses
1263                         // that are not linked. We need to link the line table and convert
1264                         // the addresses that are relative to the .o file into addresses
1265                         // for the main executable.
1266                         sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1267                     }
1268                     else
1269                     {
1270                         sc.comp_unit->SetLineTable(line_table_ap.release());
1271                         return true;
1272                     }
1273                 }
1274             }
1275         }
1276     }
1277     return false;
1278 }
1279 
1280 size_t
1281 SymbolFileDWARF::ParseFunctionBlocks
1282 (
1283     const SymbolContext& sc,
1284     Block *parent_block,
1285     DWARFCompileUnit* dwarf_cu,
1286     const DWARFDebugInfoEntry *die,
1287     addr_t subprogram_low_pc,
1288     uint32_t depth
1289 )
1290 {
1291     size_t blocks_added = 0;
1292     while (die != NULL)
1293     {
1294         dw_tag_t tag = die->Tag();
1295 
1296         switch (tag)
1297         {
1298         case DW_TAG_inlined_subroutine:
1299         case DW_TAG_subprogram:
1300         case DW_TAG_lexical_block:
1301             {
1302                 Block *block = NULL;
1303                 if (tag == DW_TAG_subprogram)
1304                 {
1305                     // Skip any DW_TAG_subprogram DIEs that are inside
1306                     // of a normal or inlined functions. These will be
1307                     // parsed on their own as separate entities.
1308 
1309                     if (depth > 0)
1310                         break;
1311 
1312                     block = parent_block;
1313                 }
1314                 else
1315                 {
1316                     BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1317                     parent_block->AddChild(block_sp);
1318                     block = block_sp.get();
1319                 }
1320                 DWARFDebugRanges::RangeList ranges;
1321                 const char *name = NULL;
1322                 const char *mangled_name = NULL;
1323 
1324                 int decl_file = 0;
1325                 int decl_line = 0;
1326                 int decl_column = 0;
1327                 int call_file = 0;
1328                 int call_line = 0;
1329                 int call_column = 0;
1330                 if (die->GetDIENamesAndRanges (this,
1331                                                dwarf_cu,
1332                                                name,
1333                                                mangled_name,
1334                                                ranges,
1335                                                decl_file, decl_line, decl_column,
1336                                                call_file, call_line, call_column))
1337                 {
1338                     if (tag == DW_TAG_subprogram)
1339                     {
1340                         assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1341                         subprogram_low_pc = ranges.GetMinRangeBase(0);
1342                     }
1343                     else if (tag == DW_TAG_inlined_subroutine)
1344                     {
1345                         // We get called here for inlined subroutines in two ways.
1346                         // The first time is when we are making the Function object
1347                         // for this inlined concrete instance.  Since we're creating a top level block at
1348                         // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1349                         // adjust the containing address.
1350                         // The second time is when we are parsing the blocks inside the function that contains
1351                         // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1352                         // function the offset will be for that function.
1353                         if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1354                         {
1355                             subprogram_low_pc = ranges.GetMinRangeBase(0);
1356                         }
1357                     }
1358 
1359                     AddRangesToBlock (*block, ranges, subprogram_low_pc);
1360 
1361                     if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1362                     {
1363                         std::unique_ptr<Declaration> decl_ap;
1364                         if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1365                             decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1366                                                           decl_line, decl_column));
1367 
1368                         std::unique_ptr<Declaration> call_ap;
1369                         if (call_file != 0 || call_line != 0 || call_column != 0)
1370                             call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1371                                                           call_line, call_column));
1372 
1373                         block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1374                     }
1375 
1376                     ++blocks_added;
1377 
1378                     if (die->HasChildren())
1379                     {
1380                         blocks_added += ParseFunctionBlocks (sc,
1381                                                              block,
1382                                                              dwarf_cu,
1383                                                              die->GetFirstChild(),
1384                                                              subprogram_low_pc,
1385                                                              depth + 1);
1386                     }
1387                 }
1388             }
1389             break;
1390         default:
1391             break;
1392         }
1393 
1394         // Only parse siblings of the block if we are not at depth zero. A depth
1395         // of zero indicates we are currently parsing the top level
1396         // DW_TAG_subprogram DIE
1397 
1398         if (depth == 0)
1399             die = NULL;
1400         else
1401             die = die->GetSibling();
1402     }
1403     return blocks_added;
1404 }
1405 
1406 bool
1407 SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1408                                    const DWARFDebugInfoEntry *die,
1409                                    ClangASTContext::TemplateParameterInfos &template_param_infos)
1410 {
1411     const dw_tag_t tag = die->Tag();
1412 
1413     switch (tag)
1414     {
1415     case DW_TAG_template_type_parameter:
1416     case DW_TAG_template_value_parameter:
1417         {
1418             const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1419 
1420             DWARFDebugInfoEntry::Attributes attributes;
1421             const size_t num_attributes = die->GetAttributes (this,
1422                                                               dwarf_cu,
1423                                                               fixed_form_sizes,
1424                                                               attributes);
1425             const char *name = NULL;
1426             Type *lldb_type = NULL;
1427             ClangASTType clang_type;
1428             uint64_t uval64 = 0;
1429             bool uval64_valid = false;
1430             if (num_attributes > 0)
1431             {
1432                 DWARFFormValue form_value;
1433                 for (size_t i=0; i<num_attributes; ++i)
1434                 {
1435                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
1436 
1437                     switch (attr)
1438                     {
1439                         case DW_AT_name:
1440                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1441                                 name = form_value.AsCString(&get_debug_str_data());
1442                             break;
1443 
1444                         case DW_AT_type:
1445                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1446                             {
1447                                 const dw_offset_t type_die_offset = form_value.Reference(dwarf_cu);
1448                                 lldb_type = ResolveTypeUID(type_die_offset);
1449                                 if (lldb_type)
1450                                     clang_type = lldb_type->GetClangForwardType();
1451                             }
1452                             break;
1453 
1454                         case DW_AT_const_value:
1455                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1456                             {
1457                                 uval64_valid = true;
1458                                 uval64 = form_value.Unsigned();
1459                             }
1460                             break;
1461                         default:
1462                             break;
1463                     }
1464                 }
1465 
1466                 clang::ASTContext *ast = GetClangASTContext().getASTContext();
1467                 if (!clang_type)
1468                     clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1469 
1470                 if (clang_type)
1471                 {
1472                     bool is_signed = false;
1473                     if (name && name[0])
1474                         template_param_infos.names.push_back(name);
1475                     else
1476                         template_param_infos.names.push_back(NULL);
1477 
1478                     if (tag == DW_TAG_template_value_parameter &&
1479                         lldb_type != NULL &&
1480                         clang_type.IsIntegerType (is_signed) &&
1481                         uval64_valid)
1482                     {
1483                         llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1484                         template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1485                                                                                       llvm::APSInt(apint),
1486                                                                                       clang_type.GetQualType()));
1487                     }
1488                     else
1489                     {
1490                         template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1491                     }
1492                 }
1493                 else
1494                 {
1495                     return false;
1496                 }
1497 
1498             }
1499         }
1500         return true;
1501 
1502     default:
1503         break;
1504     }
1505     return false;
1506 }
1507 
1508 bool
1509 SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1510                                               const DWARFDebugInfoEntry *parent_die,
1511                                               ClangASTContext::TemplateParameterInfos &template_param_infos)
1512 {
1513 
1514     if (parent_die == NULL)
1515         return false;
1516 
1517     Args template_parameter_names;
1518     for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1519          die != NULL;
1520          die = die->GetSibling())
1521     {
1522         const dw_tag_t tag = die->Tag();
1523 
1524         switch (tag)
1525         {
1526             case DW_TAG_template_type_parameter:
1527             case DW_TAG_template_value_parameter:
1528                 ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1529             break;
1530 
1531         default:
1532             break;
1533         }
1534     }
1535     if (template_param_infos.args.empty())
1536         return false;
1537     return template_param_infos.args.size() == template_param_infos.names.size();
1538 }
1539 
1540 clang::ClassTemplateDecl *
1541 SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1542                                          lldb::AccessType access_type,
1543                                          const char *parent_name,
1544                                          int tag_decl_kind,
1545                                          const ClangASTContext::TemplateParameterInfos &template_param_infos)
1546 {
1547     if (template_param_infos.IsValid())
1548     {
1549         std::string template_basename(parent_name);
1550         template_basename.erase (template_basename.find('<'));
1551         ClangASTContext &ast = GetClangASTContext();
1552 
1553         return ast.CreateClassTemplateDecl (decl_ctx,
1554                                             access_type,
1555                                             template_basename.c_str(),
1556                                             tag_decl_kind,
1557                                             template_param_infos);
1558     }
1559     return NULL;
1560 }
1561 
1562 class SymbolFileDWARF::DelayedAddObjCClassProperty
1563 {
1564 public:
1565     DelayedAddObjCClassProperty
1566     (
1567         const ClangASTType     &class_opaque_type,
1568         const char             *property_name,
1569         const ClangASTType     &property_opaque_type,  // The property type is only required if you don't have an ivar decl
1570         clang::ObjCIvarDecl    *ivar_decl,
1571         const char             *property_setter_name,
1572         const char             *property_getter_name,
1573         uint32_t                property_attributes,
1574         const ClangASTMetadata *metadata
1575     ) :
1576         m_class_opaque_type     (class_opaque_type),
1577         m_property_name         (property_name),
1578         m_property_opaque_type  (property_opaque_type),
1579         m_ivar_decl             (ivar_decl),
1580         m_property_setter_name  (property_setter_name),
1581         m_property_getter_name  (property_getter_name),
1582         m_property_attributes   (property_attributes)
1583     {
1584         if (metadata != NULL)
1585         {
1586             m_metadata_ap.reset(new ClangASTMetadata());
1587             *m_metadata_ap = *metadata;
1588         }
1589     }
1590 
1591     DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1592     {
1593         *this = rhs;
1594     }
1595 
1596     DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1597     {
1598         m_class_opaque_type    = rhs.m_class_opaque_type;
1599         m_property_name        = rhs.m_property_name;
1600         m_property_opaque_type = rhs.m_property_opaque_type;
1601         m_ivar_decl            = rhs.m_ivar_decl;
1602         m_property_setter_name = rhs.m_property_setter_name;
1603         m_property_getter_name = rhs.m_property_getter_name;
1604         m_property_attributes  = rhs.m_property_attributes;
1605 
1606         if (rhs.m_metadata_ap.get())
1607         {
1608             m_metadata_ap.reset (new ClangASTMetadata());
1609             *m_metadata_ap = *rhs.m_metadata_ap;
1610         }
1611         return *this;
1612     }
1613 
1614     bool
1615     Finalize()
1616     {
1617         return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1618                                                          m_property_opaque_type,
1619                                                          m_ivar_decl,
1620                                                          m_property_setter_name,
1621                                                          m_property_getter_name,
1622                                                          m_property_attributes,
1623                                                          m_metadata_ap.get());
1624     }
1625 private:
1626     ClangASTType            m_class_opaque_type;
1627     const char             *m_property_name;
1628     ClangASTType            m_property_opaque_type;
1629     clang::ObjCIvarDecl    *m_ivar_decl;
1630     const char             *m_property_setter_name;
1631     const char             *m_property_getter_name;
1632     uint32_t                m_property_attributes;
1633     std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1634 };
1635 
1636 struct BitfieldInfo
1637 {
1638     uint64_t bit_size;
1639     uint64_t bit_offset;
1640 
1641     BitfieldInfo () :
1642         bit_size (LLDB_INVALID_ADDRESS),
1643         bit_offset (LLDB_INVALID_ADDRESS)
1644     {
1645     }
1646 
1647     bool IsValid ()
1648     {
1649         return (bit_size != LLDB_INVALID_ADDRESS) &&
1650                (bit_offset != LLDB_INVALID_ADDRESS);
1651     }
1652 };
1653 
1654 
1655 bool
1656 SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1657                                          const DWARFDebugInfoEntry *parent_die)
1658 {
1659     if (parent_die)
1660     {
1661         for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1662         {
1663             dw_tag_t tag = die->Tag();
1664             bool check_virtuality = false;
1665             switch (tag)
1666             {
1667                 case DW_TAG_inheritance:
1668                 case DW_TAG_subprogram:
1669                     check_virtuality = true;
1670                     break;
1671                 default:
1672                     break;
1673             }
1674             if (check_virtuality)
1675             {
1676                 if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1677                     return true;
1678             }
1679         }
1680     }
1681     return false;
1682 }
1683 
1684 size_t
1685 SymbolFileDWARF::ParseChildMembers
1686 (
1687     const SymbolContext& sc,
1688     DWARFCompileUnit* dwarf_cu,
1689     const DWARFDebugInfoEntry *parent_die,
1690     ClangASTType &class_clang_type,
1691     const LanguageType class_language,
1692     std::vector<clang::CXXBaseSpecifier *>& base_classes,
1693     std::vector<int>& member_accessibilities,
1694     DWARFDIECollection& member_function_dies,
1695     DelayedPropertyList& delayed_properties,
1696     AccessType& default_accessibility,
1697     bool &is_a_class,
1698     LayoutInfo &layout_info
1699 )
1700 {
1701     if (parent_die == NULL)
1702         return 0;
1703 
1704     size_t count = 0;
1705     const DWARFDebugInfoEntry *die;
1706     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1707     uint32_t member_idx = 0;
1708     BitfieldInfo last_field_info;
1709     ModuleSP module = GetObjectFile()->GetModule();
1710 
1711     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1712     {
1713         dw_tag_t tag = die->Tag();
1714 
1715         switch (tag)
1716         {
1717         case DW_TAG_member:
1718         case DW_TAG_APPLE_property:
1719             {
1720                 DWARFDebugInfoEntry::Attributes attributes;
1721                 const size_t num_attributes = die->GetAttributes (this,
1722                                                                   dwarf_cu,
1723                                                                   fixed_form_sizes,
1724                                                                   attributes);
1725                 if (num_attributes > 0)
1726                 {
1727                     Declaration decl;
1728                     //DWARFExpression location;
1729                     const char *name = NULL;
1730                     const char *prop_name = NULL;
1731                     const char *prop_getter_name = NULL;
1732                     const char *prop_setter_name = NULL;
1733                     uint32_t prop_attributes = 0;
1734 
1735 
1736                     bool is_artificial = false;
1737                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1738                     AccessType accessibility = eAccessNone;
1739                     uint32_t member_byte_offset = UINT32_MAX;
1740                     size_t byte_size = 0;
1741                     size_t bit_offset = 0;
1742                     size_t bit_size = 0;
1743                     bool is_external = false; // On DW_TAG_members, this means the member is static
1744                     uint32_t i;
1745                     for (i=0; i<num_attributes && !is_artificial; ++i)
1746                     {
1747                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
1748                         DWARFFormValue form_value;
1749                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1750                         {
1751                             switch (attr)
1752                             {
1753                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1754                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1755                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1756                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1757                             case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
1758                             case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1759                             case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1760                             case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1761                             case DW_AT_data_member_location:
1762                                 if (form_value.BlockData())
1763                                 {
1764                                     Value initialValue(0);
1765                                     Value memberOffset(0);
1766                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
1767                                     uint32_t block_length = form_value.Unsigned();
1768                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1769                                     if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1770                                                                   NULL, // ClangExpressionVariableList *
1771                                                                   NULL, // ClangExpressionDeclMap *
1772                                                                   NULL, // RegisterContext *
1773                                                                   module,
1774                                                                   debug_info_data,
1775                                                                   block_offset,
1776                                                                   block_length,
1777                                                                   eRegisterKindDWARF,
1778                                                                   &initialValue,
1779                                                                   memberOffset,
1780                                                                   NULL))
1781                                     {
1782                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1783                                     }
1784                                 }
1785                                 else
1786                                 {
1787                                     // With DWARF 3 and later, if the value is an integer constant,
1788                                     // this form value is the offset in bytes from the beginning
1789                                     // of the containing entity.
1790                                     member_byte_offset = form_value.Unsigned();
1791                                 }
1792                                 break;
1793 
1794                             case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1795                             case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1796                             case DW_AT_APPLE_property_name:      prop_name = form_value.AsCString(&get_debug_str_data()); break;
1797                             case DW_AT_APPLE_property_getter:    prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1798                             case DW_AT_APPLE_property_setter:    prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1799                             case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1800                             case DW_AT_external:                 is_external = form_value.Boolean(); break;
1801 
1802                             default:
1803                             case DW_AT_declaration:
1804                             case DW_AT_description:
1805                             case DW_AT_mutable:
1806                             case DW_AT_visibility:
1807                             case DW_AT_sibling:
1808                                 break;
1809                             }
1810                         }
1811                     }
1812 
1813                     if (prop_name)
1814                     {
1815                         ConstString fixed_getter;
1816                         ConstString fixed_setter;
1817 
1818                         // Check if the property getter/setter were provided as full
1819                         // names.  We want basenames, so we extract them.
1820 
1821                         if (prop_getter_name && prop_getter_name[0] == '-')
1822                         {
1823                             ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1824                             prop_getter_name = prop_getter_method.GetSelector().GetCString();
1825                         }
1826 
1827                         if (prop_setter_name && prop_setter_name[0] == '-')
1828                         {
1829                             ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1830                             prop_setter_name = prop_setter_method.GetSelector().GetCString();
1831                         }
1832 
1833                         // If the names haven't been provided, they need to be
1834                         // filled in.
1835 
1836                         if (!prop_getter_name)
1837                         {
1838                             prop_getter_name = prop_name;
1839                         }
1840                         if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1841                         {
1842                             StreamString ss;
1843 
1844                             ss.Printf("set%c%s:",
1845                                       toupper(prop_name[0]),
1846                                       &prop_name[1]);
1847 
1848                             fixed_setter.SetCString(ss.GetData());
1849                             prop_setter_name = fixed_setter.GetCString();
1850                         }
1851                     }
1852 
1853                     // Clang has a DWARF generation bug where sometimes it
1854                     // represents fields that are references with bad byte size
1855                     // and bit size/offset information such as:
1856                     //
1857                     //  DW_AT_byte_size( 0x00 )
1858                     //  DW_AT_bit_size( 0x40 )
1859                     //  DW_AT_bit_offset( 0xffffffffffffffc0 )
1860                     //
1861                     // So check the bit offset to make sure it is sane, and if
1862                     // the values are not sane, remove them. If we don't do this
1863                     // then we will end up with a crash if we try to use this
1864                     // type in an expression when clang becomes unhappy with its
1865                     // recycled debug info.
1866 
1867                     if (bit_offset > 128)
1868                     {
1869                         bit_size = 0;
1870                         bit_offset = 0;
1871                     }
1872 
1873                     // FIXME: Make Clang ignore Objective-C accessibility for expressions
1874                     if (class_language == eLanguageTypeObjC ||
1875                         class_language == eLanguageTypeObjC_plus_plus)
1876                         accessibility = eAccessNone;
1877 
1878                     if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
1879                     {
1880                         // Not all compilers will mark the vtable pointer
1881                         // member as artificial (llvm-gcc). We can't have
1882                         // the virtual members in our classes otherwise it
1883                         // throws off all child offsets since we end up
1884                         // having and extra pointer sized member in our
1885                         // class layouts.
1886                         is_artificial = true;
1887                     }
1888 
1889                     // Handle static members
1890                     if (is_external && member_byte_offset == UINT32_MAX)
1891                     {
1892                         Type *var_type = ResolveTypeUID(encoding_uid);
1893 
1894                         if (var_type)
1895                         {
1896                             if (accessibility == eAccessNone)
1897                                 accessibility = eAccessPublic;
1898                             class_clang_type.AddVariableToRecordType (name,
1899                                                                       var_type->GetClangLayoutType(),
1900                                                                       accessibility);
1901                         }
1902                         break;
1903                     }
1904 
1905                     if (is_artificial == false)
1906                     {
1907                         Type *member_type = ResolveTypeUID(encoding_uid);
1908 
1909                         clang::FieldDecl *field_decl = NULL;
1910                         if (tag == DW_TAG_member)
1911                         {
1912                             if (member_type)
1913                             {
1914                                 if (accessibility == eAccessNone)
1915                                     accessibility = default_accessibility;
1916                                 member_accessibilities.push_back(accessibility);
1917 
1918                                 BitfieldInfo this_field_info;
1919 
1920                                 this_field_info.bit_size = bit_size;
1921 
1922                                 if (member_byte_offset != UINT32_MAX || bit_size != 0)
1923                                 {
1924                                     /////////////////////////////////////////////////////////////
1925                                     // How to locate a field given the DWARF debug information
1926                                     //
1927                                     // AT_byte_size indicates the size of the word in which the
1928                                     // bit offset must be interpreted.
1929                                     //
1930                                     // AT_data_member_location indicates the byte offset of the
1931                                     // word from the base address of the structure.
1932                                     //
1933                                     // AT_bit_offset indicates how many bits into the word
1934                                     // (according to the host endianness) the low-order bit of
1935                                     // the field starts.  AT_bit_offset can be negative.
1936                                     //
1937                                     // AT_bit_size indicates the size of the field in bits.
1938                                     /////////////////////////////////////////////////////////////
1939 
1940                                     this_field_info.bit_offset = 0;
1941 
1942                                     this_field_info.bit_offset += (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
1943 
1944                                     if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
1945                                     {
1946                                         this_field_info.bit_offset += byte_size * 8;
1947                                         this_field_info.bit_offset -= (bit_offset + bit_size);
1948                                     }
1949                                     else
1950                                     {
1951                                         this_field_info.bit_offset += bit_offset;
1952                                     }
1953                                 }
1954 
1955                                 // If the member to be emitted did not start on a character boundary and there is
1956                                 // empty space between the last field and this one, then we need to emit an
1957                                 // anonymous member filling up the space up to its start.  There are three cases
1958                                 // here:
1959                                 //
1960                                 // 1 If the previous member ended on a character boundary, then we can emit an
1961                                 //   anonymous member starting at the most recent character boundary.
1962                                 //
1963                                 // 2 If the previous member did not end on a character boundary and the distance
1964                                 //   from the end of the previous member to the current member is less than a
1965                                 //   word width, then we can emit an anonymous member starting right after the
1966                                 //   previous member and right before this member.
1967                                 //
1968                                 // 3 If the previous member did not end on a character boundary and the distance
1969                                 //   from the end of the previous member to the current member is greater than
1970                                 //   or equal a word width, then we act as in Case 1.
1971 
1972                                 const uint64_t character_width = 8;
1973                                 const uint64_t word_width = 32;
1974 
1975                                 if (this_field_info.IsValid())
1976                                 {
1977                                     // Objective-C has invalid DW_AT_bit_offset values in older versions
1978                                     // of clang, so we have to be careful and only insert unnammed bitfields
1979                                     // if we have a new enough clang.
1980                                     bool detect_unnamed_bitfields = true;
1981 
1982                                     if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
1983                                         detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
1984 
1985                                     if (detect_unnamed_bitfields)
1986                                     {
1987                                         BitfieldInfo anon_field_info;
1988 
1989                                         if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
1990                                         {
1991                                             uint64_t last_field_end = 0;
1992 
1993                                             if (last_field_info.IsValid())
1994                                                 last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
1995 
1996                                             if (this_field_info.bit_offset != last_field_end)
1997                                             {
1998                                                 if (((last_field_end % character_width) == 0) ||                    // case 1
1999                                                     (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
2000                                                 {
2001                                                     anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2002                                                     anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2003                                                 }
2004                                                 else                                                                // case 2
2005                                                 {
2006                                                     anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2007                                                     anon_field_info.bit_offset = last_field_end;
2008                                                 }
2009                                             }
2010                                         }
2011 
2012                                         if (anon_field_info.IsValid())
2013                                         {
2014                                             clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
2015                                                                                                                              GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
2016                                                                                                                              accessibility,
2017                                                                                                                              anon_field_info.bit_size);
2018 
2019                                             layout_info.field_offsets.insert(std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
2020                                         }
2021                                     }
2022                                 }
2023 
2024                                 ClangASTType member_clang_type = member_type->GetClangLayoutType();
2025 
2026                                 {
2027                                     // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
2028                                     // If the current field is at the end of the structure, then there is definitely no room for extra
2029                                     // elements and we override the type to array[0].
2030 
2031                                     ClangASTType member_array_element_type;
2032                                     uint64_t member_array_size;
2033                                     bool member_array_is_incomplete;
2034 
2035                                     if (member_clang_type.IsArrayType(&member_array_element_type,
2036                                                                       &member_array_size,
2037                                                                       &member_array_is_incomplete) &&
2038                                         !member_array_is_incomplete)
2039                                     {
2040                                         uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2041 
2042                                         if (member_byte_offset >= parent_byte_size)
2043                                         {
2044                                             if (member_array_size != 1)
2045                                             {
2046                                                 GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64,
2047                                                                                            MakeUserID(die->GetOffset()),
2048                                                                                            name,
2049                                                                                            encoding_uid,
2050                                                                                            MakeUserID(parent_die->GetOffset()));
2051                                             }
2052 
2053                                             member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2054                                         }
2055                                     }
2056                                 }
2057 
2058                                 field_decl = class_clang_type.AddFieldToRecordType (name,
2059                                                                                     member_clang_type,
2060                                                                                     accessibility,
2061                                                                                     bit_size);
2062 
2063                                 GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2064 
2065                                 if (this_field_info.IsValid())
2066                                 {
2067                                     layout_info.field_offsets.insert(std::make_pair(field_decl, this_field_info.bit_offset));
2068                                     last_field_info = this_field_info;
2069                                 }
2070                             }
2071                             else
2072                             {
2073                                 if (name)
2074                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2075                                                                                MakeUserID(die->GetOffset()),
2076                                                                                name,
2077                                                                                encoding_uid);
2078                                 else
2079                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2080                                                                                MakeUserID(die->GetOffset()),
2081                                                                                encoding_uid);
2082                             }
2083                         }
2084 
2085                         if (prop_name != NULL)
2086                         {
2087                             clang::ObjCIvarDecl *ivar_decl = NULL;
2088 
2089                             if (field_decl)
2090                             {
2091                                 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2092                                 assert (ivar_decl != NULL);
2093                             }
2094 
2095                             ClangASTMetadata metadata;
2096                             metadata.SetUserID (MakeUserID(die->GetOffset()));
2097                             delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2098                                                                                      prop_name,
2099                                                                                      member_type->GetClangLayoutType(),
2100                                                                                      ivar_decl,
2101                                                                                      prop_setter_name,
2102                                                                                      prop_getter_name,
2103                                                                                      prop_attributes,
2104                                                                                      &metadata));
2105 
2106                             if (ivar_decl)
2107                                 GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2108                         }
2109                     }
2110                 }
2111                 ++member_idx;
2112             }
2113             break;
2114 
2115         case DW_TAG_subprogram:
2116             // Let the type parsing code handle this one for us.
2117             member_function_dies.Append (die);
2118             break;
2119 
2120         case DW_TAG_inheritance:
2121             {
2122                 is_a_class = true;
2123                 if (default_accessibility == eAccessNone)
2124                     default_accessibility = eAccessPrivate;
2125                 // TODO: implement DW_TAG_inheritance type parsing
2126                 DWARFDebugInfoEntry::Attributes attributes;
2127                 const size_t num_attributes = die->GetAttributes (this,
2128                                                                   dwarf_cu,
2129                                                                   fixed_form_sizes,
2130                                                                   attributes);
2131                 if (num_attributes > 0)
2132                 {
2133                     Declaration decl;
2134                     DWARFExpression location;
2135                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2136                     AccessType accessibility = default_accessibility;
2137                     bool is_virtual = false;
2138                     bool is_base_of_class = true;
2139                     off_t member_byte_offset = 0;
2140                     uint32_t i;
2141                     for (i=0; i<num_attributes; ++i)
2142                     {
2143                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
2144                         DWARFFormValue form_value;
2145                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2146                         {
2147                             switch (attr)
2148                             {
2149                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2150                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
2151                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2152                             case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
2153                             case DW_AT_data_member_location:
2154                                 if (form_value.BlockData())
2155                                 {
2156                                     Value initialValue(0);
2157                                     Value memberOffset(0);
2158                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
2159                                     uint32_t block_length = form_value.Unsigned();
2160                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2161                                     if (DWARFExpression::Evaluate (NULL,
2162                                                                    NULL,
2163                                                                    NULL,
2164                                                                    NULL,
2165                                                                    module,
2166                                                                    debug_info_data,
2167                                                                    block_offset,
2168                                                                    block_length,
2169                                                                    eRegisterKindDWARF,
2170                                                                    &initialValue,
2171                                                                    memberOffset,
2172                                                                    NULL))
2173                                     {
2174                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2175                                     }
2176                                 }
2177                                 else
2178                                 {
2179                                     // With DWARF 3 and later, if the value is an integer constant,
2180                                     // this form value is the offset in bytes from the beginning
2181                                     // of the containing entity.
2182                                     member_byte_offset = form_value.Unsigned();
2183                                 }
2184                                 break;
2185 
2186                             case DW_AT_accessibility:
2187                                 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2188                                 break;
2189 
2190                             case DW_AT_virtuality:
2191                                 is_virtual = form_value.Boolean();
2192                                 break;
2193 
2194                             case DW_AT_sibling:
2195                                 break;
2196 
2197                             default:
2198                                 break;
2199                             }
2200                         }
2201                     }
2202 
2203                     Type *base_class_type = ResolveTypeUID(encoding_uid);
2204                     assert(base_class_type);
2205 
2206                     ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2207                     assert (base_class_clang_type);
2208                     if (class_language == eLanguageTypeObjC)
2209                     {
2210                         class_clang_type.SetObjCSuperClass(base_class_clang_type);
2211                     }
2212                     else
2213                     {
2214                         base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2215                                                                                                is_virtual,
2216                                                                                                is_base_of_class));
2217 
2218                         if (is_virtual)
2219                         {
2220                             // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2221                             // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2222                             // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2223                             //      DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2224                             // Given this, there is really no valid response we can give to clang for virtual base
2225                             // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2226                             // AST source in clang.
2227                         }
2228                         else
2229                         {
2230                             layout_info.base_offsets.insert(std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2231                                                                            clang::CharUnits::fromQuantity(member_byte_offset)));
2232                         }
2233                     }
2234                 }
2235             }
2236             break;
2237 
2238         default:
2239             break;
2240         }
2241     }
2242 
2243     return count;
2244 }
2245 
2246 
2247 clang::DeclContext*
2248 SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2249 {
2250     DWARFDebugInfo* debug_info = DebugInfo();
2251     if (debug_info && UserIDMatches(type_uid))
2252     {
2253         DWARFCompileUnitSP cu_sp;
2254         const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2255         if (die)
2256             return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2257     }
2258     return NULL;
2259 }
2260 
2261 clang::DeclContext*
2262 SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2263 {
2264     if (UserIDMatches(type_uid))
2265         return GetClangDeclContextForDIEOffset (sc, type_uid);
2266     return NULL;
2267 }
2268 
2269 Type*
2270 SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2271 {
2272     if (UserIDMatches(type_uid))
2273     {
2274         DWARFDebugInfo* debug_info = DebugInfo();
2275         if (debug_info)
2276         {
2277             DWARFCompileUnitSP cu_sp;
2278             const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2279             const bool assert_not_being_parsed = true;
2280             return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2281         }
2282     }
2283     return NULL;
2284 }
2285 
2286 Type*
2287 SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2288 {
2289     if (die != NULL)
2290     {
2291         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2292         if (log)
2293             GetObjectFile()->GetModule()->LogMessage (log,
2294                                                       "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2295                                                       die->GetOffset(),
2296                                                       DW_TAG_value_to_name(die->Tag()),
2297                                                       die->GetName(this, cu));
2298 
2299         // We might be coming in in the middle of a type tree (a class
2300         // withing a class, an enum within a class), so parse any needed
2301         // parent DIEs before we get to this one...
2302         const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2303         switch (decl_ctx_die->Tag())
2304         {
2305             case DW_TAG_structure_type:
2306             case DW_TAG_union_type:
2307             case DW_TAG_class_type:
2308             {
2309                 // Get the type, which could be a forward declaration
2310                 if (log)
2311                     GetObjectFile()->GetModule()->LogMessage (log,
2312                                                               "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2313                                                               die->GetOffset(),
2314                                                               DW_TAG_value_to_name(die->Tag()),
2315                                                               die->GetName(this, cu),
2316                                                               decl_ctx_die->GetOffset());
2317 //
2318 //                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2319 //                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2320 //                {
2321 //                    if (log)
2322 //                        GetObjectFile()->GetModule()->LogMessage (log,
2323 //                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2324 //                                                                  die->GetOffset(),
2325 //                                                                  DW_TAG_value_to_name(die->Tag()),
2326 //                                                                  die->GetName(this, cu),
2327 //                                                                  decl_ctx_die->GetOffset());
2328 //                    // Ask the type to complete itself if it already hasn't since if we
2329 //                    // want a function (method or static) from a class, the class must
2330 //                    // create itself and add it's own methods and class functions.
2331 //                    if (parent_type)
2332 //                        parent_type->GetClangFullType();
2333 //                }
2334             }
2335             break;
2336 
2337             default:
2338                 break;
2339         }
2340         return ResolveType (cu, die);
2341     }
2342     return NULL;
2343 }
2344 
2345 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
2346 // SymbolFileDWARF objects to detect if this DWARF file is the one that
2347 // can resolve a clang_type.
2348 bool
2349 SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2350 {
2351     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2352     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2353     return die != NULL;
2354 }
2355 
2356 
2357 bool
2358 SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2359 {
2360     // We have a struct/union/class/enum that needs to be fully resolved.
2361     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2362     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2363     if (die == NULL)
2364     {
2365         // We have already resolved this type...
2366         return true;
2367     }
2368     // Once we start resolving this type, remove it from the forward declaration
2369     // map in case anyone child members or other types require this type to get resolved.
2370     // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2371     // are done.
2372     m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2373 
2374 
2375     // Disable external storage for this type so we don't get anymore
2376     // clang::ExternalASTSource queries for this type.
2377     clang_type.SetHasExternalStorage (false);
2378 
2379     DWARFDebugInfo* debug_info = DebugInfo();
2380 
2381     DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2382     Type *type = m_die_to_type.lookup (die);
2383 
2384     const dw_tag_t tag = die->Tag();
2385 
2386     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2387     if (log)
2388     {
2389         GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2390                                                                   "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2391                                                                   MakeUserID(die->GetOffset()),
2392                                                                   DW_TAG_value_to_name(tag),
2393                                                                   type->GetName().AsCString());
2394 
2395     }
2396     assert (clang_type);
2397     DWARFDebugInfoEntry::Attributes attributes;
2398 
2399     switch (tag)
2400     {
2401     case DW_TAG_structure_type:
2402     case DW_TAG_union_type:
2403     case DW_TAG_class_type:
2404         {
2405             LayoutInfo layout_info;
2406 
2407             {
2408                 if (die->HasChildren())
2409                 {
2410 
2411                     LanguageType class_language = eLanguageTypeUnknown;
2412                     if (clang_type.IsObjCObjectOrInterfaceType())
2413                     {
2414                         class_language = eLanguageTypeObjC;
2415                         // For objective C we don't start the definition when
2416                         // the class is created.
2417                         clang_type.StartTagDeclarationDefinition ();
2418                     }
2419 
2420                     int tag_decl_kind = -1;
2421                     AccessType default_accessibility = eAccessNone;
2422                     if (tag == DW_TAG_structure_type)
2423                     {
2424                         tag_decl_kind = clang::TTK_Struct;
2425                         default_accessibility = eAccessPublic;
2426                     }
2427                     else if (tag == DW_TAG_union_type)
2428                     {
2429                         tag_decl_kind = clang::TTK_Union;
2430                         default_accessibility = eAccessPublic;
2431                     }
2432                     else if (tag == DW_TAG_class_type)
2433                     {
2434                         tag_decl_kind = clang::TTK_Class;
2435                         default_accessibility = eAccessPrivate;
2436                     }
2437 
2438                     SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2439                     std::vector<clang::CXXBaseSpecifier *> base_classes;
2440                     std::vector<int> member_accessibilities;
2441                     bool is_a_class = false;
2442                     // Parse members and base classes first
2443                     DWARFDIECollection member_function_dies;
2444 
2445                     DelayedPropertyList delayed_properties;
2446                     ParseChildMembers (sc,
2447                                        dwarf_cu,
2448                                        die,
2449                                        clang_type,
2450                                        class_language,
2451                                        base_classes,
2452                                        member_accessibilities,
2453                                        member_function_dies,
2454                                        delayed_properties,
2455                                        default_accessibility,
2456                                        is_a_class,
2457                                        layout_info);
2458 
2459                     // Now parse any methods if there were any...
2460                     size_t num_functions = member_function_dies.Size();
2461                     if (num_functions > 0)
2462                     {
2463                         for (size_t i=0; i<num_functions; ++i)
2464                         {
2465                             ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2466                         }
2467                     }
2468 
2469                     if (class_language == eLanguageTypeObjC)
2470                     {
2471                         ConstString class_name (clang_type.GetTypeName());
2472                         if (class_name)
2473                         {
2474 
2475                             DIEArray method_die_offsets;
2476                             if (m_using_apple_tables)
2477                             {
2478                                 if (m_apple_objc_ap.get())
2479                                     m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2480                             }
2481                             else
2482                             {
2483                                 if (!m_indexed)
2484                                     Index ();
2485 
2486                                 m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2487                             }
2488 
2489                             if (!method_die_offsets.empty())
2490                             {
2491                                 DWARFDebugInfo* debug_info = DebugInfo();
2492 
2493                                 DWARFCompileUnit* method_cu = NULL;
2494                                 const size_t num_matches = method_die_offsets.size();
2495                                 for (size_t i=0; i<num_matches; ++i)
2496                                 {
2497                                     const dw_offset_t die_offset = method_die_offsets[i];
2498                                     DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2499 
2500                                     if (method_die)
2501                                         ResolveType (method_cu, method_die);
2502                                     else
2503                                     {
2504                                         if (m_using_apple_tables)
2505                                         {
2506                                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2507                                                                                                        die_offset, class_name.GetCString());
2508                                         }
2509                                     }
2510                                 }
2511                             }
2512 
2513                             for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2514                                  pi != pe;
2515                                  ++pi)
2516                                 pi->Finalize();
2517                         }
2518                     }
2519 
2520                     // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2521                     // need to tell the clang type it is actually a class.
2522                     if (class_language != eLanguageTypeObjC)
2523                     {
2524                         if (is_a_class && tag_decl_kind != clang::TTK_Class)
2525                             clang_type.SetTagTypeKind (clang::TTK_Class);
2526                     }
2527 
2528                     // Since DW_TAG_structure_type gets used for both classes
2529                     // and structures, we may need to set any DW_TAG_member
2530                     // fields to have a "private" access if none was specified.
2531                     // When we parsed the child members we tracked that actual
2532                     // accessibility value for each DW_TAG_member in the
2533                     // "member_accessibilities" array. If the value for the
2534                     // member is zero, then it was set to the "default_accessibility"
2535                     // which for structs was "public". Below we correct this
2536                     // by setting any fields to "private" that weren't correctly
2537                     // set.
2538                     if (is_a_class && !member_accessibilities.empty())
2539                     {
2540                         // This is a class and all members that didn't have
2541                         // their access specified are private.
2542                         clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2543                                                                     &member_accessibilities.front(),
2544                                                                     member_accessibilities.size());
2545                     }
2546 
2547                     if (!base_classes.empty())
2548                     {
2549                         clang_type.SetBaseClassesForClassType (&base_classes.front(),
2550                                                                base_classes.size());
2551 
2552                         // Clang will copy each CXXBaseSpecifier in "base_classes"
2553                         // so we have to free them all.
2554                         ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2555                                                                  base_classes.size());
2556                     }
2557                 }
2558             }
2559 
2560             clang_type.BuildIndirectFields ();
2561             clang_type.CompleteTagDeclarationDefinition ();
2562 
2563             if (!layout_info.field_offsets.empty() ||
2564                 !layout_info.base_offsets.empty()  ||
2565                 !layout_info.vbase_offsets.empty() )
2566             {
2567                 if (type)
2568                     layout_info.bit_size = type->GetByteSize() * 8;
2569                 if (layout_info.bit_size == 0)
2570                     layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2571 
2572                 clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2573                 if (record_decl)
2574                 {
2575                     if (log)
2576                     {
2577                         GetObjectFile()->GetModule()->LogMessage (log,
2578                                                                   "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2579                                                                   clang_type.GetOpaqueQualType(),
2580                                                                   record_decl,
2581                                                                   layout_info.bit_size,
2582                                                                   layout_info.alignment,
2583                                                                   (uint32_t)layout_info.field_offsets.size(),
2584                                                                   (uint32_t)layout_info.base_offsets.size(),
2585                                                                   (uint32_t)layout_info.vbase_offsets.size());
2586 
2587                         uint32_t idx;
2588                         {
2589                         llvm::DenseMap <const clang::FieldDecl *, uint64_t>::const_iterator pos, end = layout_info.field_offsets.end();
2590                         for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2591                         {
2592                             GetObjectFile()->GetModule()->LogMessage (log,
2593                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }",
2594                                                                       clang_type.GetOpaqueQualType(),
2595                                                                       idx,
2596                                                                       (uint32_t)pos->second,
2597                                                                       pos->first->getNameAsString().c_str());
2598                         }
2599                         }
2600 
2601                         {
2602                         llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, base_end = layout_info.base_offsets.end();
2603                         for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx)
2604                         {
2605                             GetObjectFile()->GetModule()->LogMessage (log,
2606                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }",
2607                                                                       clang_type.GetOpaqueQualType(),
2608                                                                       idx,
2609                                                                       (uint32_t)base_pos->second.getQuantity(),
2610                                                                       base_pos->first->getNameAsString().c_str());
2611                         }
2612                         }
2613                         {
2614                         llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, vbase_end = layout_info.vbase_offsets.end();
2615                         for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx)
2616                         {
2617                             GetObjectFile()->GetModule()->LogMessage (log,
2618                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }",
2619                                                                       clang_type.GetOpaqueQualType(),
2620                                                                       idx,
2621                                                                       (uint32_t)vbase_pos->second.getQuantity(),
2622                                                                       vbase_pos->first->getNameAsString().c_str());
2623                         }
2624                         }
2625                     }
2626                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2627                 }
2628             }
2629         }
2630 
2631         return (bool)clang_type;
2632 
2633     case DW_TAG_enumeration_type:
2634         clang_type.StartTagDeclarationDefinition ();
2635         if (die->HasChildren())
2636         {
2637             SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2638             bool is_signed = false;
2639             clang_type.IsIntegerType(is_signed);
2640             ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2641         }
2642         clang_type.CompleteTagDeclarationDefinition ();
2643         return (bool)clang_type;
2644 
2645     default:
2646         assert(false && "not a forward clang type decl!");
2647         break;
2648     }
2649     return false;
2650 }
2651 
2652 Type*
2653 SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2654 {
2655     if (type_die != NULL)
2656     {
2657         Type *type = m_die_to_type.lookup (type_die);
2658 
2659         if (type == NULL)
2660             type = GetTypeForDIE (dwarf_cu, type_die).get();
2661 
2662         if (assert_not_being_parsed)
2663         {
2664             if (type != DIE_IS_BEING_PARSED)
2665                 return type;
2666 
2667             GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2668                                                        type_die->GetOffset(),
2669                                                        DW_TAG_value_to_name(type_die->Tag()),
2670                                                        type_die->GetName(this, dwarf_cu));
2671 
2672         }
2673         else
2674             return type;
2675     }
2676     return NULL;
2677 }
2678 
2679 CompileUnit*
2680 SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2681 {
2682     // Check if the symbol vendor already knows about this compile unit?
2683     if (dwarf_cu->GetUserData() == NULL)
2684     {
2685         // The symbol vendor doesn't know about this compile unit, we
2686         // need to parse and add it to the symbol vendor object.
2687         return ParseCompileUnit(dwarf_cu, cu_idx).get();
2688     }
2689     return (CompileUnit*)dwarf_cu->GetUserData();
2690 }
2691 
2692 bool
2693 SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2694 {
2695     sc.Clear(false);
2696     // Check if the symbol vendor already knows about this compile unit?
2697     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2698 
2699     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2700     if (sc.function == NULL)
2701         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2702 
2703     if (sc.function)
2704     {
2705         sc.module_sp = sc.function->CalculateSymbolContextModule();
2706         return true;
2707     }
2708 
2709     return false;
2710 }
2711 
2712 uint32_t
2713 SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2714 {
2715     Timer scoped_timer(__PRETTY_FUNCTION__,
2716                        "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2717                        so_addr.GetSection().get(),
2718                        so_addr.GetOffset(),
2719                        resolve_scope);
2720     uint32_t resolved = 0;
2721     if (resolve_scope & (   eSymbolContextCompUnit |
2722                             eSymbolContextFunction |
2723                             eSymbolContextBlock |
2724                             eSymbolContextLineEntry))
2725     {
2726         lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2727 
2728         DWARFDebugInfo* debug_info = DebugInfo();
2729         if (debug_info)
2730         {
2731             const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2732             if (cu_offset != DW_INVALID_OFFSET)
2733             {
2734                 uint32_t cu_idx = DW_INVALID_INDEX;
2735                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
2736                 if (dwarf_cu)
2737                 {
2738                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2739                     if (sc.comp_unit)
2740                     {
2741                         resolved |= eSymbolContextCompUnit;
2742 
2743                         bool force_check_line_table = false;
2744                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2745                         {
2746                             DWARFDebugInfoEntry *function_die = NULL;
2747                             DWARFDebugInfoEntry *block_die = NULL;
2748                             if (resolve_scope & eSymbolContextBlock)
2749                             {
2750                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
2751                             }
2752                             else
2753                             {
2754                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
2755                             }
2756 
2757                             if (function_die != NULL)
2758                             {
2759                                 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2760                                 if (sc.function == NULL)
2761                                     sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2762                             }
2763                             else
2764                             {
2765                                 // We might have had a compile unit that had discontiguous
2766                                 // address ranges where the gaps are symbols that don't have
2767                                 // any debug info. Discontiguous compile unit address ranges
2768                                 // should only happen when there aren't other functions from
2769                                 // other compile units in these gaps. This helps keep the size
2770                                 // of the aranges down.
2771                                 force_check_line_table = true;
2772                             }
2773 
2774                             if (sc.function != NULL)
2775                             {
2776                                 resolved |= eSymbolContextFunction;
2777 
2778                                 if (resolve_scope & eSymbolContextBlock)
2779                                 {
2780                                     Block& block = sc.function->GetBlock (true);
2781 
2782                                     if (block_die != NULL)
2783                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2784                                     else
2785                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2786                                     if (sc.block)
2787                                         resolved |= eSymbolContextBlock;
2788                                 }
2789                             }
2790                         }
2791 
2792                         if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
2793                         {
2794                             LineTable *line_table = sc.comp_unit->GetLineTable();
2795                             if (line_table != NULL)
2796                             {
2797                                 // And address that makes it into this function should be in terms
2798                                 // of this debug file if there is no debug map, or it will be an
2799                                 // address in the .o file which needs to be fixed up to be in terms
2800                                 // of the debug map executable. Either way, calling FixupAddress()
2801                                 // will work for us.
2802                                 Address exe_so_addr (so_addr);
2803                                 if (FixupAddress(exe_so_addr))
2804                                 {
2805                                     if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
2806                                     {
2807                                         resolved |= eSymbolContextLineEntry;
2808                                     }
2809                                 }
2810                             }
2811                         }
2812 
2813                         if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
2814                         {
2815                             // We might have had a compile unit that had discontiguous
2816                             // address ranges where the gaps are symbols that don't have
2817                             // any debug info. Discontiguous compile unit address ranges
2818                             // should only happen when there aren't other functions from
2819                             // other compile units in these gaps. This helps keep the size
2820                             // of the aranges down.
2821                             sc.comp_unit = NULL;
2822                             resolved &= ~eSymbolContextCompUnit;
2823                         }
2824                     }
2825                     else
2826                     {
2827                         GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
2828                                                                      cu_offset,
2829                                                                      cu_idx);
2830                     }
2831                 }
2832             }
2833         }
2834     }
2835     return resolved;
2836 }
2837 
2838 
2839 
2840 uint32_t
2841 SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
2842 {
2843     const uint32_t prev_size = sc_list.GetSize();
2844     if (resolve_scope & eSymbolContextCompUnit)
2845     {
2846         DWARFDebugInfo* debug_info = DebugInfo();
2847         if (debug_info)
2848         {
2849             uint32_t cu_idx;
2850             DWARFCompileUnit* dwarf_cu = NULL;
2851 
2852             for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
2853             {
2854                 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2855                 const bool full_match = (bool)file_spec.GetDirectory();
2856                 bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
2857                 if (check_inlines || file_spec_matches_cu_file_spec)
2858                 {
2859                     SymbolContext sc (m_obj_file->GetModule());
2860                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2861                     if (sc.comp_unit)
2862                     {
2863                         uint32_t file_idx = UINT32_MAX;
2864 
2865                         // If we are looking for inline functions only and we don't
2866                         // find it in the support files, we are done.
2867                         if (check_inlines)
2868                         {
2869                             file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2870                             if (file_idx == UINT32_MAX)
2871                                 continue;
2872                         }
2873 
2874                         if (line != 0)
2875                         {
2876                             LineTable *line_table = sc.comp_unit->GetLineTable();
2877 
2878                             if (line_table != NULL && line != 0)
2879                             {
2880                                 // We will have already looked up the file index if
2881                                 // we are searching for inline entries.
2882                                 if (!check_inlines)
2883                                     file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2884 
2885                                 if (file_idx != UINT32_MAX)
2886                                 {
2887                                     uint32_t found_line;
2888                                     uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
2889                                     found_line = sc.line_entry.line;
2890 
2891                                     while (line_idx != UINT32_MAX)
2892                                     {
2893                                         sc.function = NULL;
2894                                         sc.block = NULL;
2895                                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2896                                         {
2897                                             const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
2898                                             if (file_vm_addr != LLDB_INVALID_ADDRESS)
2899                                             {
2900                                                 DWARFDebugInfoEntry *function_die = NULL;
2901                                                 DWARFDebugInfoEntry *block_die = NULL;
2902                                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
2903 
2904                                                 if (function_die != NULL)
2905                                                 {
2906                                                     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2907                                                     if (sc.function == NULL)
2908                                                         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2909                                                 }
2910 
2911                                                 if (sc.function != NULL)
2912                                                 {
2913                                                     Block& block = sc.function->GetBlock (true);
2914 
2915                                                     if (block_die != NULL)
2916                                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2917                                                     else
2918                                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2919                                                 }
2920                                             }
2921                                         }
2922 
2923                                         sc_list.Append(sc);
2924                                         line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
2925                                     }
2926                                 }
2927                             }
2928                             else if (file_spec_matches_cu_file_spec && !check_inlines)
2929                             {
2930                                 // only append the context if we aren't looking for inline call sites
2931                                 // by file and line and if the file spec matches that of the compile unit
2932                                 sc_list.Append(sc);
2933                             }
2934                         }
2935                         else if (file_spec_matches_cu_file_spec && !check_inlines)
2936                         {
2937                             // only append the context if we aren't looking for inline call sites
2938                             // by file and line and if the file spec matches that of the compile unit
2939                             sc_list.Append(sc);
2940                         }
2941 
2942                         if (!check_inlines)
2943                             break;
2944                     }
2945                 }
2946             }
2947         }
2948     }
2949     return sc_list.GetSize() - prev_size;
2950 }
2951 
2952 void
2953 SymbolFileDWARF::Index ()
2954 {
2955     if (m_indexed)
2956         return;
2957     m_indexed = true;
2958     Timer scoped_timer (__PRETTY_FUNCTION__,
2959                         "SymbolFileDWARF::Index (%s)",
2960                         GetObjectFile()->GetFileSpec().GetFilename().AsCString());
2961 
2962     DWARFDebugInfo* debug_info = DebugInfo();
2963     if (debug_info)
2964     {
2965         uint32_t cu_idx = 0;
2966         const uint32_t num_compile_units = GetNumCompileUnits();
2967         for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
2968         {
2969             DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2970 
2971             bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
2972 
2973             dwarf_cu->Index (cu_idx,
2974                              m_function_basename_index,
2975                              m_function_fullname_index,
2976                              m_function_method_index,
2977                              m_function_selector_index,
2978                              m_objc_class_selectors_index,
2979                              m_global_index,
2980                              m_type_index,
2981                              m_namespace_index);
2982 
2983             // Keep memory down by clearing DIEs if this generate function
2984             // caused them to be parsed
2985             if (clear_dies)
2986                 dwarf_cu->ClearDIEs (true);
2987         }
2988 
2989         m_function_basename_index.Finalize();
2990         m_function_fullname_index.Finalize();
2991         m_function_method_index.Finalize();
2992         m_function_selector_index.Finalize();
2993         m_objc_class_selectors_index.Finalize();
2994         m_global_index.Finalize();
2995         m_type_index.Finalize();
2996         m_namespace_index.Finalize();
2997 
2998 #if defined (ENABLE_DEBUG_PRINTF)
2999         StreamFile s(stdout, false);
3000         s.Printf ("DWARF index for '%s':",
3001                   GetObjectFile()->GetFileSpec().GetPath().c_str());
3002         s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
3003         s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
3004         s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
3005         s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
3006         s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
3007         s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
3008         s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
3009         s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
3010 #endif
3011     }
3012 }
3013 
3014 bool
3015 SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3016 {
3017     if (namespace_decl == NULL)
3018     {
3019         // Invalid namespace decl which means we aren't matching only things
3020         // in this symbol file, so return true to indicate it matches this
3021         // symbol file.
3022         return true;
3023     }
3024 
3025     clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3026 
3027     if (namespace_ast == NULL)
3028         return true;    // No AST in the "namespace_decl", return true since it
3029                         // could then match any symbol file, including this one
3030 
3031     if (namespace_ast == GetClangASTContext().getASTContext())
3032         return true;    // The ASTs match, return true
3033 
3034     // The namespace AST was valid, and it does not match...
3035     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3036 
3037     if (log)
3038         GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3039 
3040     return false;
3041 }
3042 
3043 bool
3044 SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3045                                    DWARFCompileUnit* cu,
3046                                    const DWARFDebugInfoEntry* die)
3047 {
3048     // No namespace specified, so the answesr i
3049     if (namespace_decl == NULL)
3050         return true;
3051 
3052     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3053 
3054     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3055     clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3056     if (decl_ctx_die)
3057     {
3058         clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3059 
3060         if (clang_namespace_decl)
3061         {
3062             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3063             {
3064                 if (log)
3065                     GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3066                 return false;
3067             }
3068 
3069             if (clang_namespace_decl == die_clang_decl_ctx)
3070                 return true;
3071             else
3072                 return false;
3073         }
3074         else
3075         {
3076             // We have a namespace_decl that was not NULL but it contained
3077             // a NULL "clang::NamespaceDecl", so this means the global namespace
3078             // So as long the the contained decl context DIE isn't a namespace
3079             // we should be ok.
3080             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3081                 return true;
3082         }
3083     }
3084 
3085     if (log)
3086         GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3087 
3088     return false;
3089 }
3090 uint32_t
3091 SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3092 {
3093     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3094 
3095     if (log)
3096     {
3097         GetObjectFile()->GetModule()->LogMessage (log,
3098                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3099                                                   name.GetCString(),
3100                                                   namespace_decl,
3101                                                   append,
3102                                                   max_matches);
3103     }
3104 
3105     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3106         return 0;
3107 
3108     DWARFDebugInfo* info = DebugInfo();
3109     if (info == NULL)
3110         return 0;
3111 
3112     // If we aren't appending the results to this list, then clear the list
3113     if (!append)
3114         variables.Clear();
3115 
3116     // Remember how many variables are in the list before we search in case
3117     // we are appending the results to a variable list.
3118     const uint32_t original_size = variables.GetSize();
3119 
3120     DIEArray die_offsets;
3121 
3122     if (m_using_apple_tables)
3123     {
3124         if (m_apple_names_ap.get())
3125         {
3126             const char *name_cstr = name.GetCString();
3127             const char *base_name_start;
3128             const char *base_name_end = NULL;
3129 
3130             if (!CPPLanguageRuntime::StripNamespacesFromVariableName(name_cstr, base_name_start, base_name_end))
3131                 base_name_start = name_cstr;
3132 
3133             m_apple_names_ap->FindByName (base_name_start, die_offsets);
3134         }
3135     }
3136     else
3137     {
3138         // Index the DWARF if we haven't already
3139         if (!m_indexed)
3140             Index ();
3141 
3142         m_global_index.Find (name, die_offsets);
3143     }
3144 
3145     const size_t num_die_matches = die_offsets.size();
3146     if (num_die_matches)
3147     {
3148         SymbolContext sc;
3149         sc.module_sp = m_obj_file->GetModule();
3150         assert (sc.module_sp);
3151 
3152         DWARFDebugInfo* debug_info = DebugInfo();
3153         DWARFCompileUnit* dwarf_cu = NULL;
3154         const DWARFDebugInfoEntry* die = NULL;
3155         bool done = false;
3156         for (size_t i=0; i<num_die_matches && !done; ++i)
3157         {
3158             const dw_offset_t die_offset = die_offsets[i];
3159             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3160 
3161             if (die)
3162             {
3163                 switch (die->Tag())
3164                 {
3165                     default:
3166                     case DW_TAG_subprogram:
3167                     case DW_TAG_inlined_subroutine:
3168                     case DW_TAG_try_block:
3169                     case DW_TAG_catch_block:
3170                         break;
3171 
3172                     case DW_TAG_variable:
3173                         {
3174                             sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3175 
3176                             if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3177                                 continue;
3178 
3179                             ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3180 
3181                             if (variables.GetSize() - original_size >= max_matches)
3182                                 done = true;
3183                         }
3184                         break;
3185                 }
3186             }
3187             else
3188             {
3189                 if (m_using_apple_tables)
3190                 {
3191                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3192                                                                                die_offset, name.GetCString());
3193                 }
3194             }
3195         }
3196     }
3197 
3198     // Return the number of variable that were appended to the list
3199     const uint32_t num_matches = variables.GetSize() - original_size;
3200     if (log && num_matches > 0)
3201     {
3202         GetObjectFile()->GetModule()->LogMessage (log,
3203                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3204                                                   name.GetCString(),
3205                                                   namespace_decl,
3206                                                   append,
3207                                                   max_matches,
3208                                                   num_matches);
3209     }
3210     return num_matches;
3211 }
3212 
3213 uint32_t
3214 SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3215 {
3216     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3217 
3218     if (log)
3219     {
3220         GetObjectFile()->GetModule()->LogMessage (log,
3221                                                   "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3222                                                   regex.GetText(),
3223                                                   append,
3224                                                   max_matches);
3225     }
3226 
3227     DWARFDebugInfo* info = DebugInfo();
3228     if (info == NULL)
3229         return 0;
3230 
3231     // If we aren't appending the results to this list, then clear the list
3232     if (!append)
3233         variables.Clear();
3234 
3235     // Remember how many variables are in the list before we search in case
3236     // we are appending the results to a variable list.
3237     const uint32_t original_size = variables.GetSize();
3238 
3239     DIEArray die_offsets;
3240 
3241     if (m_using_apple_tables)
3242     {
3243         if (m_apple_names_ap.get())
3244         {
3245             DWARFMappedHash::DIEInfoArray hash_data_array;
3246             if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3247                 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3248         }
3249     }
3250     else
3251     {
3252         // Index the DWARF if we haven't already
3253         if (!m_indexed)
3254             Index ();
3255 
3256         m_global_index.Find (regex, die_offsets);
3257     }
3258 
3259     SymbolContext sc;
3260     sc.module_sp = m_obj_file->GetModule();
3261     assert (sc.module_sp);
3262 
3263     DWARFCompileUnit* dwarf_cu = NULL;
3264     const DWARFDebugInfoEntry* die = NULL;
3265     const size_t num_matches = die_offsets.size();
3266     if (num_matches)
3267     {
3268         DWARFDebugInfo* debug_info = DebugInfo();
3269         for (size_t i=0; i<num_matches; ++i)
3270         {
3271             const dw_offset_t die_offset = die_offsets[i];
3272             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3273 
3274             if (die)
3275             {
3276                 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3277 
3278                 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3279 
3280                 if (variables.GetSize() - original_size >= max_matches)
3281                     break;
3282             }
3283             else
3284             {
3285                 if (m_using_apple_tables)
3286                 {
3287                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3288                                                                                die_offset, regex.GetText());
3289                 }
3290             }
3291         }
3292     }
3293 
3294     // Return the number of variable that were appended to the list
3295     return variables.GetSize() - original_size;
3296 }
3297 
3298 
3299 bool
3300 SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3301                                   DWARFCompileUnit *&dwarf_cu,
3302                                   SymbolContextList& sc_list)
3303 {
3304     const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3305     return ResolveFunction (dwarf_cu, die, sc_list);
3306 }
3307 
3308 
3309 bool
3310 SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3311                                   const DWARFDebugInfoEntry *die,
3312                                   SymbolContextList& sc_list)
3313 {
3314     SymbolContext sc;
3315 
3316     if (die == NULL)
3317         return false;
3318 
3319     // If we were passed a die that is not a function, just return false...
3320     if (die->Tag() != DW_TAG_subprogram && die->Tag() != DW_TAG_inlined_subroutine)
3321         return false;
3322 
3323     const DWARFDebugInfoEntry* inlined_die = NULL;
3324     if (die->Tag() == DW_TAG_inlined_subroutine)
3325     {
3326         inlined_die = die;
3327 
3328         while ((die = die->GetParent()) != NULL)
3329         {
3330             if (die->Tag() == DW_TAG_subprogram)
3331                 break;
3332         }
3333     }
3334     assert (die->Tag() == DW_TAG_subprogram);
3335     if (GetFunction (cu, die, sc))
3336     {
3337         Address addr;
3338         // Parse all blocks if needed
3339         if (inlined_die)
3340         {
3341             sc.block = sc.function->GetBlock (true).FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3342             assert (sc.block != NULL);
3343             if (sc.block->GetStartAddress (addr) == false)
3344                 addr.Clear();
3345         }
3346         else
3347         {
3348             sc.block = NULL;
3349             addr = sc.function->GetAddressRange().GetBaseAddress();
3350         }
3351 
3352         if (addr.IsValid())
3353         {
3354             sc_list.Append(sc);
3355             return true;
3356         }
3357     }
3358 
3359     return false;
3360 }
3361 
3362 void
3363 SymbolFileDWARF::FindFunctions (const ConstString &name,
3364                                 const NameToDIE &name_to_die,
3365                                 SymbolContextList& sc_list)
3366 {
3367     DIEArray die_offsets;
3368     if (name_to_die.Find (name, die_offsets))
3369     {
3370         ParseFunctions (die_offsets, sc_list);
3371     }
3372 }
3373 
3374 
3375 void
3376 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3377                                 const NameToDIE &name_to_die,
3378                                 SymbolContextList& sc_list)
3379 {
3380     DIEArray die_offsets;
3381     if (name_to_die.Find (regex, die_offsets))
3382     {
3383         ParseFunctions (die_offsets, sc_list);
3384     }
3385 }
3386 
3387 
3388 void
3389 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3390                                 const DWARFMappedHash::MemoryTable &memory_table,
3391                                 SymbolContextList& sc_list)
3392 {
3393     DIEArray die_offsets;
3394     DWARFMappedHash::DIEInfoArray hash_data_array;
3395     if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3396     {
3397         DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3398         ParseFunctions (die_offsets, sc_list);
3399     }
3400 }
3401 
3402 void
3403 SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3404                                  SymbolContextList& sc_list)
3405 {
3406     const size_t num_matches = die_offsets.size();
3407     if (num_matches)
3408     {
3409         SymbolContext sc;
3410 
3411         DWARFCompileUnit* dwarf_cu = NULL;
3412         for (size_t i=0; i<num_matches; ++i)
3413         {
3414             const dw_offset_t die_offset = die_offsets[i];
3415             ResolveFunction (die_offset, dwarf_cu, sc_list);
3416         }
3417     }
3418 }
3419 
3420 bool
3421 SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3422                                                 const DWARFCompileUnit *dwarf_cu,
3423                                                 uint32_t name_type_mask,
3424                                                 const char *partial_name,
3425                                                 const char *base_name_start,
3426                                                 const char *base_name_end)
3427 {
3428     // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3429     if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3430     {
3431         clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3432         if (!containing_decl_ctx)
3433             return false;
3434 
3435         bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3436 
3437         if (name_type_mask == eFunctionNameTypeMethod)
3438         {
3439             if (is_cxx_method == false)
3440                 return false;
3441         }
3442 
3443         if (name_type_mask == eFunctionNameTypeBase)
3444         {
3445             if (is_cxx_method == true)
3446                 return false;
3447         }
3448     }
3449 
3450     // Now we need to check whether the name we got back for this type matches the extra specifications
3451     // that were in the name we're looking up:
3452     if (base_name_start != partial_name || *base_name_end != '\0')
3453     {
3454         // First see if the stuff to the left matches the full name.  To do that let's see if
3455         // we can pull out the mips linkage name attribute:
3456 
3457         Mangled best_name;
3458         DWARFDebugInfoEntry::Attributes attributes;
3459         DWARFFormValue form_value;
3460         die->GetAttributes(this, dwarf_cu, NULL, attributes);
3461         uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3462         if (idx == UINT32_MAX)
3463             idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3464         if (idx != UINT32_MAX)
3465         {
3466             if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3467             {
3468                 const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3469                 if (mangled_name)
3470                     best_name.SetValue (ConstString(mangled_name), true);
3471             }
3472         }
3473 
3474         if (!best_name)
3475         {
3476             idx = attributes.FindAttributeIndex(DW_AT_name);
3477             if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3478             {
3479                 const char *name = form_value.AsCString(&get_debug_str_data());
3480                 best_name.SetValue (ConstString(name), false);
3481             }
3482         }
3483 
3484         if (best_name.GetDemangledName())
3485         {
3486             const char *demangled = best_name.GetDemangledName().GetCString();
3487             if (demangled)
3488             {
3489                 std::string name_no_parens(partial_name, base_name_end - partial_name);
3490                 const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3491                 if (partial_in_demangled == NULL)
3492                     return false;
3493                 else
3494                 {
3495                     // Sort out the case where our name is something like "Process::Destroy" and the match is
3496                     // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3497                     // namespace boundaries...
3498 
3499                     if (partial_name[0] == ':'  && partial_name[1] == ':')
3500                     {
3501                         // The partial name was already on a namespace boundary so all matches are good.
3502                         return true;
3503                     }
3504                     else if (partial_in_demangled == demangled)
3505                     {
3506                         // They both start the same, so this is an good match.
3507                         return true;
3508                     }
3509                     else
3510                     {
3511                         if (partial_in_demangled - demangled == 1)
3512                         {
3513                             // Only one character difference, can't be a namespace boundary...
3514                             return false;
3515                         }
3516                         else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3517                         {
3518                             // We are on a namespace boundary, so this is also good.
3519                             return true;
3520                         }
3521                         else
3522                             return false;
3523                     }
3524                 }
3525             }
3526         }
3527     }
3528 
3529     return true;
3530 }
3531 
3532 uint32_t
3533 SymbolFileDWARF::FindFunctions (const ConstString &name,
3534                                 const lldb_private::ClangNamespaceDecl *namespace_decl,
3535                                 uint32_t name_type_mask,
3536                                 bool include_inlines,
3537                                 bool append,
3538                                 SymbolContextList& sc_list)
3539 {
3540     Timer scoped_timer (__PRETTY_FUNCTION__,
3541                         "SymbolFileDWARF::FindFunctions (name = '%s')",
3542                         name.AsCString());
3543 
3544     // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3545     assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3546 
3547     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3548 
3549     if (log)
3550     {
3551         GetObjectFile()->GetModule()->LogMessage (log,
3552                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3553                                                   name.GetCString(),
3554                                                   name_type_mask,
3555                                                   append);
3556     }
3557 
3558     // If we aren't appending the results to this list, then clear the list
3559     if (!append)
3560         sc_list.Clear();
3561 
3562     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3563         return 0;
3564 
3565     // If name is empty then we won't find anything.
3566     if (name.IsEmpty())
3567         return 0;
3568 
3569     // Remember how many sc_list are in the list before we search in case
3570     // we are appending the results to a variable list.
3571 
3572     const char *name_cstr = name.GetCString();
3573 
3574     const uint32_t original_size = sc_list.GetSize();
3575 
3576     DWARFDebugInfo* info = DebugInfo();
3577     if (info == NULL)
3578         return 0;
3579 
3580     DWARFCompileUnit *dwarf_cu = NULL;
3581     std::set<const DWARFDebugInfoEntry *> resolved_dies;
3582     if (m_using_apple_tables)
3583     {
3584         if (m_apple_names_ap.get())
3585         {
3586 
3587             DIEArray die_offsets;
3588 
3589             uint32_t num_matches = 0;
3590 
3591             if (name_type_mask & eFunctionNameTypeFull)
3592             {
3593                 // If they asked for the full name, match what they typed.  At some point we may
3594                 // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3595                 // dies that we find by exact match.
3596                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3597                 for (uint32_t i = 0; i < num_matches; i++)
3598                 {
3599                     const dw_offset_t die_offset = die_offsets[i];
3600                     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3601                     if (die)
3602                     {
3603                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3604                             continue;
3605 
3606                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3607                             continue;
3608 
3609                         if (resolved_dies.find(die) == resolved_dies.end())
3610                         {
3611                             if (ResolveFunction (dwarf_cu, die, sc_list))
3612                                 resolved_dies.insert(die);
3613                         }
3614                     }
3615                     else
3616                     {
3617                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3618                                                                                    die_offset, name_cstr);
3619                     }
3620                 }
3621             }
3622 
3623             if (name_type_mask & eFunctionNameTypeSelector)
3624             {
3625                 if (namespace_decl && *namespace_decl)
3626                     return 0; // no selectors in namespaces
3627 
3628                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3629                 // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3630                 // and if it is an ObjC method name, we're good.
3631 
3632                 for (uint32_t i = 0; i < num_matches; i++)
3633                 {
3634                     const dw_offset_t die_offset = die_offsets[i];
3635                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3636                     if (die)
3637                     {
3638                         const char *die_name = die->GetName(this, dwarf_cu);
3639                         if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3640                         {
3641                             if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3642                                 continue;
3643 
3644                             if (resolved_dies.find(die) == resolved_dies.end())
3645                             {
3646                                 if (ResolveFunction (dwarf_cu, die, sc_list))
3647                                     resolved_dies.insert(die);
3648                             }
3649                         }
3650                     }
3651                     else
3652                     {
3653                         GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3654                                                                    die_offset, name_cstr);
3655                     }
3656                 }
3657                 die_offsets.clear();
3658             }
3659 
3660             if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3661             {
3662                 // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3663                 // extract the base name, look that up, and if there is any other information in the name we were
3664                 // passed in we have to post-filter based on that.
3665 
3666                 // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3667                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3668 
3669                 for (uint32_t i = 0; i < num_matches; i++)
3670                 {
3671                     const dw_offset_t die_offset = die_offsets[i];
3672                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3673                     if (die)
3674                     {
3675                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3676                             continue;
3677 
3678                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3679                             continue;
3680 
3681                         // If we get to here, the die is good, and we should add it:
3682                         if (resolved_dies.find(die) == resolved_dies.end())
3683                         if (ResolveFunction (dwarf_cu, die, sc_list))
3684                         {
3685                             bool keep_die = true;
3686                             if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3687                             {
3688                                 // We are looking for either basenames or methods, so we need to
3689                                 // trim out the ones we won't want by looking at the type
3690                                 SymbolContext sc;
3691                                 if (sc_list.GetLastContext(sc))
3692                                 {
3693                                     if (sc.block)
3694                                     {
3695                                         // We have an inlined function
3696                                     }
3697                                     else if (sc.function)
3698                                     {
3699                                         Type *type = sc.function->GetType();
3700 
3701                                         if (type)
3702                                         {
3703                                             clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3704                                             if (decl_ctx->isRecord())
3705                                             {
3706                                                 if (name_type_mask & eFunctionNameTypeBase)
3707                                                 {
3708                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3709                                                     keep_die = false;
3710                                                 }
3711                                             }
3712                                             else
3713                                             {
3714                                                 if (name_type_mask & eFunctionNameTypeMethod)
3715                                                 {
3716                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3717                                                     keep_die = false;
3718                                                 }
3719                                             }
3720                                         }
3721                                         else
3722                                         {
3723                                             GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
3724                                                                                          die_offset);
3725                                         }
3726                                     }
3727                                 }
3728                             }
3729                             if (keep_die)
3730                                 resolved_dies.insert(die);
3731                         }
3732                     }
3733                     else
3734                     {
3735                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3736                                                                                    die_offset, name_cstr);
3737                     }
3738                 }
3739                 die_offsets.clear();
3740             }
3741         }
3742     }
3743     else
3744     {
3745 
3746         // Index the DWARF if we haven't already
3747         if (!m_indexed)
3748             Index ();
3749 
3750         if (name_type_mask & eFunctionNameTypeFull)
3751         {
3752             FindFunctions (name, m_function_fullname_index, sc_list);
3753 
3754             // FIXME Temporary workaround for global/anonymous namespace
3755             // functions on FreeBSD and Linux
3756 #if defined (__FreeBSD__) || defined (__linux__)
3757             // If we didn't find any functions in the global namespace try
3758             // looking in the basename index but ignore any returned
3759             // functions that have a namespace (ie. mangled names starting with
3760             // '_ZN') but keep functions which have an anonymous namespace
3761             if (sc_list.GetSize() == 0)
3762             {
3763                 SymbolContextList temp_sc_list;
3764                 FindFunctions (name, m_function_basename_index, temp_sc_list);
3765                 if (!namespace_decl)
3766                 {
3767                     SymbolContext sc;
3768                     for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
3769                     {
3770                         if (temp_sc_list.GetContextAtIndex(i, sc))
3771                         {
3772                             ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
3773                             ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
3774                             if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
3775                                 !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
3776                             {
3777                                 sc_list.Append(sc);
3778                             }
3779                         }
3780                     }
3781                 }
3782             }
3783 #endif
3784         }
3785         DIEArray die_offsets;
3786         DWARFCompileUnit *dwarf_cu = NULL;
3787 
3788         if (name_type_mask & eFunctionNameTypeBase)
3789         {
3790             uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
3791             for (uint32_t i = 0; i < num_base; i++)
3792             {
3793                 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3794                 if (die)
3795                 {
3796                     if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3797                         continue;
3798 
3799                     if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3800                         continue;
3801 
3802                     // If we get to here, the die is good, and we should add it:
3803                     if (resolved_dies.find(die) == resolved_dies.end())
3804                     {
3805                         if (ResolveFunction (dwarf_cu, die, sc_list))
3806                             resolved_dies.insert(die);
3807                     }
3808                 }
3809             }
3810             die_offsets.clear();
3811         }
3812 
3813         if (name_type_mask & eFunctionNameTypeMethod)
3814         {
3815             if (namespace_decl && *namespace_decl)
3816                 return 0; // no methods in namespaces
3817 
3818             uint32_t num_base = m_function_method_index.Find(name, die_offsets);
3819             {
3820                 for (uint32_t i = 0; i < num_base; i++)
3821                 {
3822                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3823                     if (die)
3824                     {
3825                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3826                             continue;
3827 
3828                         // If we get to here, the die is good, and we should add it:
3829                         if (resolved_dies.find(die) == resolved_dies.end())
3830                         {
3831                             if (ResolveFunction (dwarf_cu, die, sc_list))
3832                                 resolved_dies.insert(die);
3833                         }
3834                     }
3835                 }
3836             }
3837             die_offsets.clear();
3838         }
3839 
3840         if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
3841         {
3842             FindFunctions (name, m_function_selector_index, sc_list);
3843         }
3844 
3845     }
3846 
3847     // Return the number of variable that were appended to the list
3848     const uint32_t num_matches = sc_list.GetSize() - original_size;
3849 
3850     if (log && num_matches > 0)
3851     {
3852         GetObjectFile()->GetModule()->LogMessage (log,
3853                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list) => %u",
3854                                                   name.GetCString(),
3855                                                   name_type_mask,
3856                                                   append,
3857                                                   num_matches);
3858     }
3859     return num_matches;
3860 }
3861 
3862 uint32_t
3863 SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
3864 {
3865     Timer scoped_timer (__PRETTY_FUNCTION__,
3866                         "SymbolFileDWARF::FindFunctions (regex = '%s')",
3867                         regex.GetText());
3868 
3869     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3870 
3871     if (log)
3872     {
3873         GetObjectFile()->GetModule()->LogMessage (log,
3874                                                   "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
3875                                                   regex.GetText(),
3876                                                   append);
3877     }
3878 
3879 
3880     // If we aren't appending the results to this list, then clear the list
3881     if (!append)
3882         sc_list.Clear();
3883 
3884     // Remember how many sc_list are in the list before we search in case
3885     // we are appending the results to a variable list.
3886     uint32_t original_size = sc_list.GetSize();
3887 
3888     if (m_using_apple_tables)
3889     {
3890         if (m_apple_names_ap.get())
3891             FindFunctions (regex, *m_apple_names_ap, sc_list);
3892     }
3893     else
3894     {
3895         // Index the DWARF if we haven't already
3896         if (!m_indexed)
3897             Index ();
3898 
3899         FindFunctions (regex, m_function_basename_index, sc_list);
3900 
3901         FindFunctions (regex, m_function_fullname_index, sc_list);
3902     }
3903 
3904     // Return the number of variable that were appended to the list
3905     return sc_list.GetSize() - original_size;
3906 }
3907 
3908 uint32_t
3909 SymbolFileDWARF::FindTypes (const SymbolContext& sc,
3910                             const ConstString &name,
3911                             const lldb_private::ClangNamespaceDecl *namespace_decl,
3912                             bool append,
3913                             uint32_t max_matches,
3914                             TypeList& types)
3915 {
3916     DWARFDebugInfo* info = DebugInfo();
3917     if (info == NULL)
3918         return 0;
3919 
3920     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3921 
3922     if (log)
3923     {
3924         if (namespace_decl)
3925         {
3926             GetObjectFile()->GetModule()->LogMessage (log,
3927                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
3928                                                       name.GetCString(),
3929                                                       namespace_decl->GetNamespaceDecl(),
3930                                                       namespace_decl->GetQualifiedName().c_str(),
3931                                                       append,
3932                                                       max_matches);
3933         }
3934         else
3935         {
3936             GetObjectFile()->GetModule()->LogMessage (log,
3937                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
3938                                                       name.GetCString(),
3939                                                       append,
3940                                                       max_matches);
3941         }
3942     }
3943 
3944     // If we aren't appending the results to this list, then clear the list
3945     if (!append)
3946         types.Clear();
3947 
3948     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3949         return 0;
3950 
3951     DIEArray die_offsets;
3952 
3953     if (m_using_apple_tables)
3954     {
3955         if (m_apple_types_ap.get())
3956         {
3957             const char *name_cstr = name.GetCString();
3958             m_apple_types_ap->FindByName (name_cstr, die_offsets);
3959         }
3960     }
3961     else
3962     {
3963         if (!m_indexed)
3964             Index ();
3965 
3966         m_type_index.Find (name, die_offsets);
3967     }
3968 
3969     const size_t num_die_matches = die_offsets.size();
3970 
3971     if (num_die_matches)
3972     {
3973         const uint32_t initial_types_size = types.GetSize();
3974         DWARFCompileUnit* dwarf_cu = NULL;
3975         const DWARFDebugInfoEntry* die = NULL;
3976         DWARFDebugInfo* debug_info = DebugInfo();
3977         for (size_t i=0; i<num_die_matches; ++i)
3978         {
3979             const dw_offset_t die_offset = die_offsets[i];
3980             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3981 
3982             if (die)
3983             {
3984                 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3985                     continue;
3986 
3987                 Type *matching_type = ResolveType (dwarf_cu, die);
3988                 if (matching_type)
3989                 {
3990                     // We found a type pointer, now find the shared pointer form our type list
3991                     types.InsertUnique (matching_type->shared_from_this());
3992                     if (types.GetSize() >= max_matches)
3993                         break;
3994                 }
3995             }
3996             else
3997             {
3998                 if (m_using_apple_tables)
3999                 {
4000                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4001                                                                                die_offset, name.GetCString());
4002                 }
4003             }
4004 
4005         }
4006         const uint32_t num_matches = types.GetSize() - initial_types_size;
4007         if (log && num_matches)
4008         {
4009             if (namespace_decl)
4010             {
4011                 GetObjectFile()->GetModule()->LogMessage (log,
4012                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4013                                                           name.GetCString(),
4014                                                           namespace_decl->GetNamespaceDecl(),
4015                                                           namespace_decl->GetQualifiedName().c_str(),
4016                                                           append,
4017                                                           max_matches,
4018                                                           num_matches);
4019             }
4020             else
4021             {
4022                 GetObjectFile()->GetModule()->LogMessage (log,
4023                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4024                                                           name.GetCString(),
4025                                                           append,
4026                                                           max_matches,
4027                                                           num_matches);
4028             }
4029         }
4030         return num_matches;
4031     }
4032     return 0;
4033 }
4034 
4035 
4036 ClangNamespaceDecl
4037 SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4038                                 const ConstString &name,
4039                                 const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4040 {
4041     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4042 
4043     if (log)
4044     {
4045         GetObjectFile()->GetModule()->LogMessage (log,
4046                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4047                                                   name.GetCString());
4048     }
4049 
4050     if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4051         return ClangNamespaceDecl();
4052 
4053     ClangNamespaceDecl namespace_decl;
4054     DWARFDebugInfo* info = DebugInfo();
4055     if (info)
4056     {
4057         DIEArray die_offsets;
4058 
4059         // Index if we already haven't to make sure the compile units
4060         // get indexed and make their global DIE index list
4061         if (m_using_apple_tables)
4062         {
4063             if (m_apple_namespaces_ap.get())
4064             {
4065                 const char *name_cstr = name.GetCString();
4066                 m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4067             }
4068         }
4069         else
4070         {
4071             if (!m_indexed)
4072                 Index ();
4073 
4074             m_namespace_index.Find (name, die_offsets);
4075         }
4076 
4077         DWARFCompileUnit* dwarf_cu = NULL;
4078         const DWARFDebugInfoEntry* die = NULL;
4079         const size_t num_matches = die_offsets.size();
4080         if (num_matches)
4081         {
4082             DWARFDebugInfo* debug_info = DebugInfo();
4083             for (size_t i=0; i<num_matches; ++i)
4084             {
4085                 const dw_offset_t die_offset = die_offsets[i];
4086                 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4087 
4088                 if (die)
4089                 {
4090                     if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4091                         continue;
4092 
4093                     clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4094                     if (clang_namespace_decl)
4095                     {
4096                         namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4097                         namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4098                         break;
4099                     }
4100                 }
4101                 else
4102                 {
4103                     if (m_using_apple_tables)
4104                     {
4105                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4106                                                                    die_offset, name.GetCString());
4107                     }
4108                 }
4109 
4110             }
4111         }
4112     }
4113     if (log && namespace_decl.GetNamespaceDecl())
4114     {
4115         GetObjectFile()->GetModule()->LogMessage (log,
4116                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4117                                                   name.GetCString(),
4118                                                   namespace_decl.GetNamespaceDecl(),
4119                                                   namespace_decl.GetQualifiedName().c_str());
4120     }
4121 
4122     return namespace_decl;
4123 }
4124 
4125 uint32_t
4126 SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4127 {
4128     // Remember how many sc_list are in the list before we search in case
4129     // we are appending the results to a variable list.
4130     uint32_t original_size = types.GetSize();
4131 
4132     const uint32_t num_die_offsets = die_offsets.size();
4133     // Parse all of the types we found from the pubtypes matches
4134     uint32_t i;
4135     uint32_t num_matches = 0;
4136     for (i = 0; i < num_die_offsets; ++i)
4137     {
4138         Type *matching_type = ResolveTypeUID (die_offsets[i]);
4139         if (matching_type)
4140         {
4141             // We found a type pointer, now find the shared pointer form our type list
4142             types.InsertUnique (matching_type->shared_from_this());
4143             ++num_matches;
4144             if (num_matches >= max_matches)
4145                 break;
4146         }
4147     }
4148 
4149     // Return the number of variable that were appended to the list
4150     return types.GetSize() - original_size;
4151 }
4152 
4153 
4154 size_t
4155 SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4156                                        clang::DeclContext *containing_decl_ctx,
4157                                        DWARFCompileUnit* dwarf_cu,
4158                                        const DWARFDebugInfoEntry *parent_die,
4159                                        bool skip_artificial,
4160                                        bool &is_static,
4161                                        TypeList* type_list,
4162                                        std::vector<ClangASTType>& function_param_types,
4163                                        std::vector<clang::ParmVarDecl*>& function_param_decls,
4164                                        unsigned &type_quals,
4165                                        ClangASTContext::TemplateParameterInfos &template_param_infos)
4166 {
4167     if (parent_die == NULL)
4168         return 0;
4169 
4170     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4171 
4172     size_t arg_idx = 0;
4173     const DWARFDebugInfoEntry *die;
4174     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4175     {
4176         dw_tag_t tag = die->Tag();
4177         switch (tag)
4178         {
4179         case DW_TAG_formal_parameter:
4180             {
4181                 DWARFDebugInfoEntry::Attributes attributes;
4182                 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4183                 if (num_attributes > 0)
4184                 {
4185                     const char *name = NULL;
4186                     Declaration decl;
4187                     dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4188                     bool is_artificial = false;
4189                     // one of None, Auto, Register, Extern, Static, PrivateExtern
4190 
4191                     clang::StorageClass storage = clang::SC_None;
4192                     uint32_t i;
4193                     for (i=0; i<num_attributes; ++i)
4194                     {
4195                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4196                         DWARFFormValue form_value;
4197                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4198                         {
4199                             switch (attr)
4200                             {
4201                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4202                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4203                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4204                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
4205                             case DW_AT_type:        param_type_die_offset = form_value.Reference(dwarf_cu); break;
4206                             case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
4207                             case DW_AT_location:
4208     //                          if (form_value.BlockData())
4209     //                          {
4210     //                              const DWARFDataExtractor& debug_info_data = debug_info();
4211     //                              uint32_t block_length = form_value.Unsigned();
4212     //                              DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4213     //                          }
4214     //                          else
4215     //                          {
4216     //                          }
4217     //                          break;
4218                             case DW_AT_const_value:
4219                             case DW_AT_default_value:
4220                             case DW_AT_description:
4221                             case DW_AT_endianity:
4222                             case DW_AT_is_optional:
4223                             case DW_AT_segment:
4224                             case DW_AT_variable_parameter:
4225                             default:
4226                             case DW_AT_abstract_origin:
4227                             case DW_AT_sibling:
4228                                 break;
4229                             }
4230                         }
4231                     }
4232 
4233                     bool skip = false;
4234                     if (skip_artificial)
4235                     {
4236                         if (is_artificial)
4237                         {
4238                             // In order to determine if a C++ member function is
4239                             // "const" we have to look at the const-ness of "this"...
4240                             // Ugly, but that
4241                             if (arg_idx == 0)
4242                             {
4243                                 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4244                                 {
4245                                     // Often times compilers omit the "this" name for the
4246                                     // specification DIEs, so we can't rely upon the name
4247                                     // being in the formal parameter DIE...
4248                                     if (name == NULL || ::strcmp(name, "this")==0)
4249                                     {
4250                                         Type *this_type = ResolveTypeUID (param_type_die_offset);
4251                                         if (this_type)
4252                                         {
4253                                             uint32_t encoding_mask = this_type->GetEncodingMask();
4254                                             if (encoding_mask & Type::eEncodingIsPointerUID)
4255                                             {
4256                                                 is_static = false;
4257 
4258                                                 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4259                                                     type_quals |= clang::Qualifiers::Const;
4260                                                 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4261                                                     type_quals |= clang::Qualifiers::Volatile;
4262                                             }
4263                                         }
4264                                     }
4265                                 }
4266                             }
4267                             skip = true;
4268                         }
4269                         else
4270                         {
4271 
4272                             // HACK: Objective C formal parameters "self" and "_cmd"
4273                             // are not marked as artificial in the DWARF...
4274                             CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4275                             if (comp_unit)
4276                             {
4277                                 switch (comp_unit->GetLanguage())
4278                                 {
4279                                     case eLanguageTypeObjC:
4280                                     case eLanguageTypeObjC_plus_plus:
4281                                         if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4282                                             skip = true;
4283                                         break;
4284                                     default:
4285                                         break;
4286                                 }
4287                             }
4288                         }
4289                     }
4290 
4291                     if (!skip)
4292                     {
4293                         Type *type = ResolveTypeUID(param_type_die_offset);
4294                         if (type)
4295                         {
4296                             function_param_types.push_back (type->GetClangForwardType());
4297 
4298                             clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4299                                                                                                                   type->GetClangForwardType(),
4300                                                                                                                   storage);
4301                             assert(param_var_decl);
4302                             function_param_decls.push_back(param_var_decl);
4303 
4304                             GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4305                         }
4306                     }
4307                 }
4308                 arg_idx++;
4309             }
4310             break;
4311 
4312         case DW_TAG_template_type_parameter:
4313         case DW_TAG_template_value_parameter:
4314             ParseTemplateDIE (dwarf_cu, die,template_param_infos);
4315             break;
4316 
4317         default:
4318             break;
4319         }
4320     }
4321     return arg_idx;
4322 }
4323 
4324 size_t
4325 SymbolFileDWARF::ParseChildEnumerators
4326 (
4327     const SymbolContext& sc,
4328     lldb_private::ClangASTType &clang_type,
4329     bool is_signed,
4330     uint32_t enumerator_byte_size,
4331     DWARFCompileUnit* dwarf_cu,
4332     const DWARFDebugInfoEntry *parent_die
4333 )
4334 {
4335     if (parent_die == NULL)
4336         return 0;
4337 
4338     size_t enumerators_added = 0;
4339     const DWARFDebugInfoEntry *die;
4340     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4341 
4342     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4343     {
4344         const dw_tag_t tag = die->Tag();
4345         if (tag == DW_TAG_enumerator)
4346         {
4347             DWARFDebugInfoEntry::Attributes attributes;
4348             const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4349             if (num_child_attributes > 0)
4350             {
4351                 const char *name = NULL;
4352                 bool got_value = false;
4353                 int64_t enum_value = 0;
4354                 Declaration decl;
4355 
4356                 uint32_t i;
4357                 for (i=0; i<num_child_attributes; ++i)
4358                 {
4359                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
4360                     DWARFFormValue form_value;
4361                     if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4362                     {
4363                         switch (attr)
4364                         {
4365                         case DW_AT_const_value:
4366                             got_value = true;
4367                             if (is_signed)
4368                                 enum_value = form_value.Signed();
4369                             else
4370                                 enum_value = form_value.Unsigned();
4371                             break;
4372 
4373                         case DW_AT_name:
4374                             name = form_value.AsCString(&get_debug_str_data());
4375                             break;
4376 
4377                         case DW_AT_description:
4378                         default:
4379                         case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4380                         case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4381                         case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4382                         case DW_AT_sibling:
4383                             break;
4384                         }
4385                     }
4386                 }
4387 
4388                 if (name && name[0] && got_value)
4389                 {
4390                     clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4391                                                                      decl,
4392                                                                      name,
4393                                                                      enum_value,
4394                                                                      enumerator_byte_size * 8);
4395                     ++enumerators_added;
4396                 }
4397             }
4398         }
4399     }
4400     return enumerators_added;
4401 }
4402 
4403 void
4404 SymbolFileDWARF::ParseChildArrayInfo
4405 (
4406     const SymbolContext& sc,
4407     DWARFCompileUnit* dwarf_cu,
4408     const DWARFDebugInfoEntry *parent_die,
4409     int64_t& first_index,
4410     std::vector<uint64_t>& element_orders,
4411     uint32_t& byte_stride,
4412     uint32_t& bit_stride
4413 )
4414 {
4415     if (parent_die == NULL)
4416         return;
4417 
4418     const DWARFDebugInfoEntry *die;
4419     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4420     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4421     {
4422         const dw_tag_t tag = die->Tag();
4423         switch (tag)
4424         {
4425         case DW_TAG_subrange_type:
4426             {
4427                 DWARFDebugInfoEntry::Attributes attributes;
4428                 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4429                 if (num_child_attributes > 0)
4430                 {
4431                     uint64_t num_elements = 0;
4432                     uint64_t lower_bound = 0;
4433                     uint64_t upper_bound = 0;
4434                     bool upper_bound_valid = false;
4435                     uint32_t i;
4436                     for (i=0; i<num_child_attributes; ++i)
4437                     {
4438                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4439                         DWARFFormValue form_value;
4440                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4441                         {
4442                             switch (attr)
4443                             {
4444                             case DW_AT_name:
4445                                 break;
4446 
4447                             case DW_AT_count:
4448                                 num_elements = form_value.Unsigned();
4449                                 break;
4450 
4451                             case DW_AT_bit_stride:
4452                                 bit_stride = form_value.Unsigned();
4453                                 break;
4454 
4455                             case DW_AT_byte_stride:
4456                                 byte_stride = form_value.Unsigned();
4457                                 break;
4458 
4459                             case DW_AT_lower_bound:
4460                                 lower_bound = form_value.Unsigned();
4461                                 break;
4462 
4463                             case DW_AT_upper_bound:
4464                                 upper_bound_valid = true;
4465                                 upper_bound = form_value.Unsigned();
4466                                 break;
4467 
4468                             default:
4469                             case DW_AT_abstract_origin:
4470                             case DW_AT_accessibility:
4471                             case DW_AT_allocated:
4472                             case DW_AT_associated:
4473                             case DW_AT_data_location:
4474                             case DW_AT_declaration:
4475                             case DW_AT_description:
4476                             case DW_AT_sibling:
4477                             case DW_AT_threads_scaled:
4478                             case DW_AT_type:
4479                             case DW_AT_visibility:
4480                                 break;
4481                             }
4482                         }
4483                     }
4484 
4485                     if (num_elements == 0)
4486                     {
4487                         if (upper_bound_valid && upper_bound >= lower_bound)
4488                             num_elements = upper_bound - lower_bound + 1;
4489                     }
4490 
4491                     element_orders.push_back (num_elements);
4492                 }
4493             }
4494             break;
4495         }
4496     }
4497 }
4498 
4499 TypeSP
4500 SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4501 {
4502     TypeSP type_sp;
4503     if (die != NULL)
4504     {
4505         assert(dwarf_cu != NULL);
4506         Type *type_ptr = m_die_to_type.lookup (die);
4507         if (type_ptr == NULL)
4508         {
4509             CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4510             assert (lldb_cu);
4511             SymbolContext sc(lldb_cu);
4512             type_sp = ParseType(sc, dwarf_cu, die, NULL);
4513         }
4514         else if (type_ptr != DIE_IS_BEING_PARSED)
4515         {
4516             // Grab the existing type from the master types lists
4517             type_sp = type_ptr->shared_from_this();
4518         }
4519 
4520     }
4521     return type_sp;
4522 }
4523 
4524 clang::DeclContext *
4525 SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4526 {
4527     if (die_offset != DW_INVALID_OFFSET)
4528     {
4529         DWARFCompileUnitSP cu_sp;
4530         const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4531         return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4532     }
4533     return NULL;
4534 }
4535 
4536 clang::DeclContext *
4537 SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4538 {
4539     if (die_offset != DW_INVALID_OFFSET)
4540     {
4541         DWARFDebugInfo* debug_info = DebugInfo();
4542         if (debug_info)
4543         {
4544             DWARFCompileUnitSP cu_sp;
4545             const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4546             if (die)
4547                 return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4548         }
4549     }
4550     return NULL;
4551 }
4552 
4553 clang::NamespaceDecl *
4554 SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4555 {
4556     if (die && die->Tag() == DW_TAG_namespace)
4557     {
4558         // See if we already parsed this namespace DIE and associated it with a
4559         // uniqued namespace declaration
4560         clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4561         if (namespace_decl)
4562             return namespace_decl;
4563         else
4564         {
4565             const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4566             clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4567             namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4568             Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4569             if (log)
4570             {
4571                 if (namespace_name)
4572                 {
4573                     GetObjectFile()->GetModule()->LogMessage (log,
4574                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4575                                                               GetClangASTContext().getASTContext(),
4576                                                               MakeUserID(die->GetOffset()),
4577                                                               namespace_name,
4578                                                               namespace_decl,
4579                                                               namespace_decl->getOriginalNamespace());
4580                 }
4581                 else
4582                 {
4583                     GetObjectFile()->GetModule()->LogMessage (log,
4584                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4585                                                               GetClangASTContext().getASTContext(),
4586                                                               MakeUserID(die->GetOffset()),
4587                                                               namespace_decl,
4588                                                               namespace_decl->getOriginalNamespace());
4589                 }
4590             }
4591 
4592             if (namespace_decl)
4593                 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4594             return namespace_decl;
4595         }
4596     }
4597     return NULL;
4598 }
4599 
4600 clang::DeclContext *
4601 SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4602 {
4603     clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4604     if (clang_decl_ctx)
4605         return clang_decl_ctx;
4606     // If this DIE has a specification, or an abstract origin, then trace to those.
4607 
4608     dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4609     if (die_offset != DW_INVALID_OFFSET)
4610         return GetClangDeclContextForDIEOffset (sc, die_offset);
4611 
4612     die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4613     if (die_offset != DW_INVALID_OFFSET)
4614         return GetClangDeclContextForDIEOffset (sc, die_offset);
4615 
4616     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4617     if (log)
4618         GetObjectFile()->GetModule()->LogMessage(log, "SymbolFileDWARF::GetClangDeclContextForDIE (die = 0x%8.8x) %s '%s'", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), die->GetName(this, cu));
4619     // This is the DIE we want.  Parse it, then query our map.
4620     bool assert_not_being_parsed = true;
4621     ResolveTypeUID (cu, die, assert_not_being_parsed);
4622 
4623     clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4624 
4625     return clang_decl_ctx;
4626 }
4627 
4628 clang::DeclContext *
4629 SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4630 {
4631     if (m_clang_tu_decl == NULL)
4632         m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4633 
4634     const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4635 
4636     if (decl_ctx_die_copy)
4637         *decl_ctx_die_copy = decl_ctx_die;
4638 
4639     if (decl_ctx_die)
4640     {
4641 
4642         DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4643         if (pos != m_die_to_decl_ctx.end())
4644             return pos->second;
4645 
4646         switch (decl_ctx_die->Tag())
4647         {
4648         case DW_TAG_compile_unit:
4649             return m_clang_tu_decl;
4650 
4651         case DW_TAG_namespace:
4652             return ResolveNamespaceDIE (cu, decl_ctx_die);
4653             break;
4654 
4655         case DW_TAG_structure_type:
4656         case DW_TAG_union_type:
4657         case DW_TAG_class_type:
4658             {
4659                 Type* type = ResolveType (cu, decl_ctx_die);
4660                 if (type)
4661                 {
4662                     clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4663                     if (decl_ctx)
4664                     {
4665                         LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4666                         if (decl_ctx)
4667                             return decl_ctx;
4668                     }
4669                 }
4670             }
4671             break;
4672 
4673         default:
4674             break;
4675         }
4676     }
4677     return m_clang_tu_decl;
4678 }
4679 
4680 
4681 const DWARFDebugInfoEntry *
4682 SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4683 {
4684     if (cu && die)
4685     {
4686         const DWARFDebugInfoEntry * const decl_die = die;
4687 
4688         while (die != NULL)
4689         {
4690             // If this is the original DIE that we are searching for a declaration
4691             // for, then don't look in the cache as we don't want our own decl
4692             // context to be our decl context...
4693             if (decl_die != die)
4694             {
4695                 switch (die->Tag())
4696                 {
4697                     case DW_TAG_compile_unit:
4698                     case DW_TAG_namespace:
4699                     case DW_TAG_structure_type:
4700                     case DW_TAG_union_type:
4701                     case DW_TAG_class_type:
4702                         return die;
4703 
4704                     default:
4705                         break;
4706                 }
4707             }
4708 
4709             dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4710             if (die_offset != DW_INVALID_OFFSET)
4711             {
4712                 DWARFCompileUnit *spec_cu = cu;
4713                 const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4714                 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4715                 if (spec_die_decl_ctx_die)
4716                     return spec_die_decl_ctx_die;
4717             }
4718 
4719             die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4720             if (die_offset != DW_INVALID_OFFSET)
4721             {
4722                 DWARFCompileUnit *abs_cu = cu;
4723                 const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4724                 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4725                 if (abs_die_decl_ctx_die)
4726                     return abs_die_decl_ctx_die;
4727             }
4728 
4729             die = die->GetParent();
4730         }
4731     }
4732     return NULL;
4733 }
4734 
4735 
4736 Symbol *
4737 SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
4738 {
4739     Symbol *objc_class_symbol = NULL;
4740     if (m_obj_file)
4741     {
4742         Symtab *symtab = m_obj_file->GetSymtab ();
4743         if (symtab)
4744         {
4745             objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
4746                                                                         eSymbolTypeObjCClass,
4747                                                                         Symtab::eDebugNo,
4748                                                                         Symtab::eVisibilityAny);
4749         }
4750     }
4751     return objc_class_symbol;
4752 }
4753 
4754 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
4755 // then we can end up looking through all class types for a complete type and never find
4756 // the full definition. We need to know if this attribute is supported, so we determine
4757 // this here and cache th result. We also need to worry about the debug map DWARF file
4758 // if we are doing darwin DWARF in .o file debugging.
4759 bool
4760 SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
4761 {
4762     if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
4763     {
4764         m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
4765         if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
4766             m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4767         else
4768         {
4769             DWARFDebugInfo* debug_info = DebugInfo();
4770             const uint32_t num_compile_units = GetNumCompileUnits();
4771             for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
4772             {
4773                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
4774                 if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
4775                 {
4776                     m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4777                     break;
4778                 }
4779             }
4780         }
4781         if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
4782             return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
4783     }
4784     return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
4785 }
4786 
4787 // This function can be used when a DIE is found that is a forward declaration
4788 // DIE and we want to try and find a type that has the complete definition.
4789 TypeSP
4790 SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
4791                                                        const ConstString &type_name,
4792                                                        bool must_be_implementation)
4793 {
4794 
4795     TypeSP type_sp;
4796 
4797     if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
4798         return type_sp;
4799 
4800     DIEArray die_offsets;
4801 
4802     if (m_using_apple_tables)
4803     {
4804         if (m_apple_types_ap.get())
4805         {
4806             const char *name_cstr = type_name.GetCString();
4807             m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
4808         }
4809     }
4810     else
4811     {
4812         if (!m_indexed)
4813             Index ();
4814 
4815         m_type_index.Find (type_name, die_offsets);
4816     }
4817 
4818     const size_t num_matches = die_offsets.size();
4819 
4820     DWARFCompileUnit* type_cu = NULL;
4821     const DWARFDebugInfoEntry* type_die = NULL;
4822     if (num_matches)
4823     {
4824         DWARFDebugInfo* debug_info = DebugInfo();
4825         for (size_t i=0; i<num_matches; ++i)
4826         {
4827             const dw_offset_t die_offset = die_offsets[i];
4828             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4829 
4830             if (type_die)
4831             {
4832                 bool try_resolving_type = false;
4833 
4834                 // Don't try and resolve the DIE we are looking for with the DIE itself!
4835                 if (type_die != die)
4836                 {
4837                     switch (type_die->Tag())
4838                     {
4839                         case DW_TAG_class_type:
4840                         case DW_TAG_structure_type:
4841                             try_resolving_type = true;
4842                             break;
4843                         default:
4844                             break;
4845                     }
4846                 }
4847 
4848                 if (try_resolving_type)
4849                 {
4850                     if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
4851                         try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
4852 
4853                     if (try_resolving_type)
4854                     {
4855                         Type *resolved_type = ResolveType (type_cu, type_die, false);
4856                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4857                         {
4858                             DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
4859                                           MakeUserID(die->GetOffset()),
4860                                           m_obj_file->GetFileSpec().GetFilename().AsCString(),
4861                                           MakeUserID(type_die->GetOffset()),
4862                                           MakeUserID(type_cu->GetOffset()));
4863 
4864                             if (die)
4865                                 m_die_to_type[die] = resolved_type;
4866                             type_sp = resolved_type->shared_from_this();
4867                             break;
4868                         }
4869                     }
4870                 }
4871             }
4872             else
4873             {
4874                 if (m_using_apple_tables)
4875                 {
4876                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4877                                                                die_offset, type_name.GetCString());
4878                 }
4879             }
4880 
4881         }
4882     }
4883     return type_sp;
4884 }
4885 
4886 
4887 //----------------------------------------------------------------------
4888 // This function helps to ensure that the declaration contexts match for
4889 // two different DIEs. Often times debug information will refer to a
4890 // forward declaration of a type (the equivalent of "struct my_struct;".
4891 // There will often be a declaration of that type elsewhere that has the
4892 // full definition. When we go looking for the full type "my_struct", we
4893 // will find one or more matches in the accelerator tables and we will
4894 // then need to make sure the type was in the same declaration context
4895 // as the original DIE. This function can efficiently compare two DIEs
4896 // and will return true when the declaration context matches, and false
4897 // when they don't.
4898 //----------------------------------------------------------------------
4899 bool
4900 SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
4901                                        DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
4902 {
4903     if (die1 == die2)
4904         return true;
4905 
4906 #if defined (LLDB_CONFIGURATION_DEBUG)
4907     // You can't and shouldn't call this function with a compile unit from
4908     // two different SymbolFileDWARF instances.
4909     assert (DebugInfo()->ContainsCompileUnit (cu1));
4910     assert (DebugInfo()->ContainsCompileUnit (cu2));
4911 #endif
4912 
4913     DWARFDIECollection decl_ctx_1;
4914     DWARFDIECollection decl_ctx_2;
4915     //The declaration DIE stack is a stack of the declaration context
4916     // DIEs all the way back to the compile unit. If a type "T" is
4917     // declared inside a class "B", and class "B" is declared inside
4918     // a class "A" and class "A" is in a namespace "lldb", and the
4919     // namespace is in a compile unit, there will be a stack of DIEs:
4920     //
4921     //   [0] DW_TAG_class_type for "B"
4922     //   [1] DW_TAG_class_type for "A"
4923     //   [2] DW_TAG_namespace  for "lldb"
4924     //   [3] DW_TAG_compile_unit for the source file.
4925     //
4926     // We grab both contexts and make sure that everything matches
4927     // all the way back to the compiler unit.
4928 
4929     // First lets grab the decl contexts for both DIEs
4930     die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
4931     die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
4932     // Make sure the context arrays have the same size, otherwise
4933     // we are done
4934     const size_t count1 = decl_ctx_1.Size();
4935     const size_t count2 = decl_ctx_2.Size();
4936     if (count1 != count2)
4937         return false;
4938 
4939     // Make sure the DW_TAG values match all the way back up the the
4940     // compile unit. If they don't, then we are done.
4941     const DWARFDebugInfoEntry *decl_ctx_die1;
4942     const DWARFDebugInfoEntry *decl_ctx_die2;
4943     size_t i;
4944     for (i=0; i<count1; i++)
4945     {
4946         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4947         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4948         if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
4949             return false;
4950     }
4951 #if defined LLDB_CONFIGURATION_DEBUG
4952 
4953     // Make sure the top item in the decl context die array is always
4954     // DW_TAG_compile_unit. If it isn't then something went wrong in
4955     // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
4956     assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
4957 
4958 #endif
4959     // Always skip the compile unit when comparing by only iterating up to
4960     // "count - 1". Here we compare the names as we go.
4961     for (i=0; i<count1 - 1; i++)
4962     {
4963         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4964         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4965         const char *name1 = decl_ctx_die1->GetName(this, cu1);
4966         const char *name2 = decl_ctx_die2->GetName(this, cu2);
4967         // If the string was from a DW_FORM_strp, then the pointer will often
4968         // be the same!
4969         if (name1 == name2)
4970             continue;
4971 
4972         // Name pointers are not equal, so only compare the strings
4973         // if both are not NULL.
4974         if (name1 && name2)
4975         {
4976             // If the strings don't compare, we are done...
4977             if (strcmp(name1, name2) != 0)
4978                 return false;
4979         }
4980         else
4981         {
4982             // One name was NULL while the other wasn't
4983             return false;
4984         }
4985     }
4986     // We made it through all of the checks and the declaration contexts
4987     // are equal.
4988     return true;
4989 }
4990 
4991 // This function can be used when a DIE is found that is a forward declaration
4992 // DIE and we want to try and find a type that has the complete definition.
4993 // "cu" and "die" must be from this SymbolFileDWARF
4994 TypeSP
4995 SymbolFileDWARF::FindDefinitionTypeForDIE (DWARFCompileUnit* cu,
4996                                            const DWARFDebugInfoEntry *die,
4997                                            const ConstString &type_name)
4998 {
4999     TypeSP type_sp;
5000 
5001 #if defined (LLDB_CONFIGURATION_DEBUG)
5002     // You can't and shouldn't call this function with a compile unit from
5003     // another SymbolFileDWARF instance.
5004     assert (DebugInfo()->ContainsCompileUnit (cu));
5005 #endif
5006 
5007     if (cu == NULL || die == NULL || !type_name)
5008         return type_sp;
5009 
5010     std::string qualified_name;
5011 
5012     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5013     if (log)
5014     {
5015         die->GetQualifiedName(this, cu, qualified_name);
5016         GetObjectFile()->GetModule()->LogMessage (log,
5017                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x (%s), name='%s')",
5018                                                   die->GetOffset(),
5019                                                   qualified_name.c_str(),
5020                                                   type_name.GetCString());
5021     }
5022 
5023     DIEArray die_offsets;
5024 
5025     if (m_using_apple_tables)
5026     {
5027         if (m_apple_types_ap.get())
5028         {
5029             const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5030             const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5031             if (has_tag && has_qualified_name_hash)
5032             {
5033                 if (qualified_name.empty())
5034                     die->GetQualifiedName(this, cu, qualified_name);
5035 
5036                 const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name.c_str());
5037                 if (log)
5038                     GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5039                 m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), die->Tag(), qualified_name_hash, die_offsets);
5040             }
5041             else if (has_tag > 1)
5042             {
5043                 if (log)
5044                     GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5045                 m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), die->Tag(), die_offsets);
5046             }
5047             else
5048             {
5049                 m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5050             }
5051         }
5052     }
5053     else
5054     {
5055         if (!m_indexed)
5056             Index ();
5057 
5058         m_type_index.Find (type_name, die_offsets);
5059     }
5060 
5061     const size_t num_matches = die_offsets.size();
5062 
5063     const dw_tag_t die_tag = die->Tag();
5064 
5065     DWARFCompileUnit* type_cu = NULL;
5066     const DWARFDebugInfoEntry* type_die = NULL;
5067     if (num_matches)
5068     {
5069         DWARFDebugInfo* debug_info = DebugInfo();
5070         for (size_t i=0; i<num_matches; ++i)
5071         {
5072             const dw_offset_t die_offset = die_offsets[i];
5073             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5074 
5075             if (type_die)
5076             {
5077                 bool try_resolving_type = false;
5078 
5079                 // Don't try and resolve the DIE we are looking for with the DIE itself!
5080                 if (type_die != die)
5081                 {
5082                     const dw_tag_t type_die_tag = type_die->Tag();
5083                     // Make sure the tags match
5084                     if (type_die_tag == die_tag)
5085                     {
5086                         // The tags match, lets try resolving this type
5087                         try_resolving_type = true;
5088                     }
5089                     else
5090                     {
5091                         // The tags don't match, but we need to watch our for a
5092                         // forward declaration for a struct and ("struct foo")
5093                         // ends up being a class ("class foo { ... };") or
5094                         // vice versa.
5095                         switch (type_die_tag)
5096                         {
5097                         case DW_TAG_class_type:
5098                             // We had a "class foo", see if we ended up with a "struct foo { ... };"
5099                             try_resolving_type = (die_tag == DW_TAG_structure_type);
5100                             break;
5101                         case DW_TAG_structure_type:
5102                             // We had a "struct foo", see if we ended up with a "class foo { ... };"
5103                             try_resolving_type = (die_tag == DW_TAG_class_type);
5104                             break;
5105                         default:
5106                             // Tags don't match, don't event try to resolve
5107                             // using this type whose name matches....
5108                             break;
5109                         }
5110                     }
5111                 }
5112 
5113                 if (try_resolving_type)
5114                 {
5115                     if (log)
5116                     {
5117                         std::string qualified_name;
5118                         type_die->GetQualifiedName(this, cu, qualified_name);
5119                         GetObjectFile()->GetModule()->LogMessage (log,
5120                                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') trying die=0x%8.8x (%s)",
5121                                                                   die->GetOffset(),
5122                                                                   type_name.GetCString(),
5123                                                                   type_die->GetOffset(),
5124                                                                   qualified_name.c_str());
5125                     }
5126 
5127                     // Make sure the decl contexts match all the way up
5128                     if (DIEDeclContextsMatch(cu, die, type_cu, type_die))
5129                     {
5130                         Type *resolved_type = ResolveType (type_cu, type_die, false);
5131                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5132                         {
5133                             DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ") from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
5134                                           MakeUserID(die->GetOffset()),
5135                                           MakeUserID(cu->GetOffset()),
5136                                           m_obj_file->GetFileSpec().GetFilename().AsCString(),
5137                                           MakeUserID(type_die->GetOffset()),
5138                                           MakeUserID(type_cu->GetOffset()));
5139 
5140                             m_die_to_type[die] = resolved_type;
5141                             type_sp = resolved_type->shared_from_this();
5142                             break;
5143                         }
5144                     }
5145                 }
5146                 else
5147                 {
5148                     if (log)
5149                     {
5150                         std::string qualified_name;
5151                         type_die->GetQualifiedName(this, cu, qualified_name);
5152                         GetObjectFile()->GetModule()->LogMessage (log,
5153                                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') ignoring die=0x%8.8x (%s)",
5154                                                                   die->GetOffset(),
5155                                                                   type_name.GetCString(),
5156                                                                   type_die->GetOffset(),
5157                                                                   qualified_name.c_str());
5158                     }
5159                 }
5160             }
5161             else
5162             {
5163                 if (m_using_apple_tables)
5164                 {
5165                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5166                                                                                die_offset, type_name.GetCString());
5167                 }
5168             }
5169 
5170         }
5171     }
5172     return type_sp;
5173 }
5174 
5175 TypeSP
5176 SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5177 {
5178     TypeSP type_sp;
5179 
5180     const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5181     if (dwarf_decl_ctx_count > 0)
5182     {
5183         const ConstString type_name(dwarf_decl_ctx[0].name);
5184         const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5185 
5186         if (type_name)
5187         {
5188             Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5189             if (log)
5190             {
5191                 GetObjectFile()->GetModule()->LogMessage (log,
5192                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5193                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5194                                                           dwarf_decl_ctx.GetQualifiedName());
5195             }
5196 
5197             DIEArray die_offsets;
5198 
5199             if (m_using_apple_tables)
5200             {
5201                 if (m_apple_types_ap.get())
5202                 {
5203                     const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5204                     const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5205                     if (has_tag && has_qualified_name_hash)
5206                     {
5207                         const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5208                         const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5209                         if (log)
5210                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5211                         m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5212                     }
5213                     else if (has_tag)
5214                     {
5215                         if (log)
5216                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5217                         m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5218                     }
5219                     else
5220                     {
5221                         m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5222                     }
5223                 }
5224             }
5225             else
5226             {
5227                 if (!m_indexed)
5228                     Index ();
5229 
5230                 m_type_index.Find (type_name, die_offsets);
5231             }
5232 
5233             const size_t num_matches = die_offsets.size();
5234 
5235 
5236             DWARFCompileUnit* type_cu = NULL;
5237             const DWARFDebugInfoEntry* type_die = NULL;
5238             if (num_matches)
5239             {
5240                 DWARFDebugInfo* debug_info = DebugInfo();
5241                 for (size_t i=0; i<num_matches; ++i)
5242                 {
5243                     const dw_offset_t die_offset = die_offsets[i];
5244                     type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5245 
5246                     if (type_die)
5247                     {
5248                         bool try_resolving_type = false;
5249 
5250                         // Don't try and resolve the DIE we are looking for with the DIE itself!
5251                         const dw_tag_t type_tag = type_die->Tag();
5252                         // Make sure the tags match
5253                         if (type_tag == tag)
5254                         {
5255                             // The tags match, lets try resolving this type
5256                             try_resolving_type = true;
5257                         }
5258                         else
5259                         {
5260                             // The tags don't match, but we need to watch our for a
5261                             // forward declaration for a struct and ("struct foo")
5262                             // ends up being a class ("class foo { ... };") or
5263                             // vice versa.
5264                             switch (type_tag)
5265                             {
5266                                 case DW_TAG_class_type:
5267                                     // We had a "class foo", see if we ended up with a "struct foo { ... };"
5268                                     try_resolving_type = (tag == DW_TAG_structure_type);
5269                                     break;
5270                                 case DW_TAG_structure_type:
5271                                     // We had a "struct foo", see if we ended up with a "class foo { ... };"
5272                                     try_resolving_type = (tag == DW_TAG_class_type);
5273                                     break;
5274                                 default:
5275                                     // Tags don't match, don't event try to resolve
5276                                     // using this type whose name matches....
5277                                     break;
5278                             }
5279                         }
5280 
5281                         if (try_resolving_type)
5282                         {
5283                             DWARFDeclContext type_dwarf_decl_ctx;
5284                             type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5285 
5286                             if (log)
5287                             {
5288                                 GetObjectFile()->GetModule()->LogMessage (log,
5289                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5290                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5291                                                                           dwarf_decl_ctx.GetQualifiedName(),
5292                                                                           type_die->GetOffset(),
5293                                                                           type_dwarf_decl_ctx.GetQualifiedName());
5294                             }
5295 
5296                             // Make sure the decl contexts match all the way up
5297                             if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5298                             {
5299                                 Type *resolved_type = ResolveType (type_cu, type_die, false);
5300                                 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5301                                 {
5302                                     type_sp = resolved_type->shared_from_this();
5303                                     break;
5304                                 }
5305                             }
5306                         }
5307                         else
5308                         {
5309                             if (log)
5310                             {
5311                                 std::string qualified_name;
5312                                 type_die->GetQualifiedName(this, type_cu, qualified_name);
5313                                 GetObjectFile()->GetModule()->LogMessage (log,
5314                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5315                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5316                                                                           dwarf_decl_ctx.GetQualifiedName(),
5317                                                                           type_die->GetOffset(),
5318                                                                           qualified_name.c_str());
5319                             }
5320                         }
5321                     }
5322                     else
5323                     {
5324                         if (m_using_apple_tables)
5325                         {
5326                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5327                                                                                        die_offset, type_name.GetCString());
5328                         }
5329                     }
5330 
5331                 }
5332             }
5333         }
5334     }
5335     return type_sp;
5336 }
5337 
5338 bool
5339 SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5340                                              Type *class_type,
5341                                              DWARFCompileUnit* src_cu,
5342                                              const DWARFDebugInfoEntry *src_class_die,
5343                                              DWARFCompileUnit* dst_cu,
5344                                              const DWARFDebugInfoEntry *dst_class_die,
5345                                              llvm::SmallVectorImpl <const DWARFDebugInfoEntry *> &failures)
5346 {
5347     if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5348         return false;
5349     if (src_class_die->Tag() != dst_class_die->Tag())
5350         return false;
5351 
5352     // We need to complete the class type so we can get all of the method types
5353     // parsed so we can then unique those types to their equivalent counterparts
5354     // in "dst_cu" and "dst_class_die"
5355     class_type->GetClangFullType();
5356 
5357     const DWARFDebugInfoEntry *src_die;
5358     const DWARFDebugInfoEntry *dst_die;
5359     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5360     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5361     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5362     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5363     for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5364     {
5365         if (src_die->Tag() == DW_TAG_subprogram)
5366         {
5367             // Make sure this is a declaration and not a concrete instance by looking
5368             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5369             // are placed inside the class definitions and shouldn't be included in
5370             // the list of things are are tracking here.
5371             if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5372             {
5373                 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5374                 if (src_name)
5375                 {
5376                     ConstString src_const_name(src_name);
5377                     if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5378                         src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5379                     else
5380                         src_name_to_die.Append(src_const_name.GetCString(), src_die);
5381                 }
5382             }
5383         }
5384     }
5385     for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5386     {
5387         if (dst_die->Tag() == DW_TAG_subprogram)
5388         {
5389             // Make sure this is a declaration and not a concrete instance by looking
5390             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5391             // are placed inside the class definitions and shouldn't be included in
5392             // the list of things are are tracking here.
5393             if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5394             {
5395                 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5396                 if (dst_name)
5397                 {
5398                     ConstString dst_const_name(dst_name);
5399                     if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5400                         dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5401                     else
5402                         dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5403                 }
5404             }
5405         }
5406     }
5407     const uint32_t src_size = src_name_to_die.GetSize ();
5408     const uint32_t dst_size = dst_name_to_die.GetSize ();
5409     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5410 
5411     // Is everything kosher so we can go through the members at top speed?
5412     bool fast_path = true;
5413 
5414     if (src_size != dst_size)
5415     {
5416         if (src_size != 0 && dst_size != 0)
5417         {
5418             if (log)
5419                 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)",
5420                             src_class_die->GetOffset(),
5421                             dst_class_die->GetOffset(),
5422                             src_size,
5423                             dst_size);
5424         }
5425 
5426         fast_path = false;
5427     }
5428 
5429     uint32_t idx;
5430 
5431     if (fast_path)
5432     {
5433         for (idx = 0; idx < src_size; ++idx)
5434         {
5435             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5436             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5437 
5438             if (src_die->Tag() != dst_die->Tag())
5439             {
5440                 if (log)
5441                     log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
5442                                 src_class_die->GetOffset(),
5443                                 dst_class_die->GetOffset(),
5444                                 src_die->GetOffset(),
5445                                 DW_TAG_value_to_name(src_die->Tag()),
5446                                 dst_die->GetOffset(),
5447                                 DW_TAG_value_to_name(src_die->Tag()));
5448                 fast_path = false;
5449             }
5450 
5451             const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5452             const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5453 
5454             // Make sure the names match
5455             if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5456                 continue;
5457 
5458             if (log)
5459                 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
5460                             src_class_die->GetOffset(),
5461                             dst_class_die->GetOffset(),
5462                             src_die->GetOffset(),
5463                             src_name,
5464                             dst_die->GetOffset(),
5465                             dst_name);
5466 
5467             fast_path = false;
5468         }
5469     }
5470 
5471     // Now do the work of linking the DeclContexts and Types.
5472     if (fast_path)
5473     {
5474         // We can do this quickly.  Just run across the tables index-for-index since
5475         // we know each node has matching names and tags.
5476         for (idx = 0; idx < src_size; ++idx)
5477         {
5478             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5479             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5480 
5481             clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5482             if (src_decl_ctx)
5483             {
5484                 if (log)
5485                     log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5486                 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5487             }
5488             else
5489             {
5490                 if (log)
5491                     log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5492             }
5493 
5494             Type *src_child_type = m_die_to_type[src_die];
5495             if (src_child_type)
5496             {
5497                 if (log)
5498                     log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5499                 m_die_to_type[dst_die] = src_child_type;
5500             }
5501             else
5502             {
5503                 if (log)
5504                     log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5505             }
5506         }
5507     }
5508     else
5509     {
5510         // We must do this slowly.  For each member of the destination, look
5511         // up a member in the source with the same name, check its tag, and
5512         // unique them if everything matches up.  Report failures.
5513 
5514         if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5515         {
5516             src_name_to_die.Sort();
5517 
5518             for (idx = 0; idx < dst_size; ++idx)
5519             {
5520                 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5521                 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5522                 src_die = src_name_to_die.Find(dst_name, NULL);
5523 
5524                 if (src_die && (src_die->Tag() == dst_die->Tag()))
5525                 {
5526                     clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5527                     if (src_decl_ctx)
5528                     {
5529                         if (log)
5530                             log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5531                         LinkDeclContextToDIE (src_decl_ctx, dst_die);
5532                     }
5533                     else
5534                     {
5535                         if (log)
5536                             log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5537                     }
5538 
5539                     Type *src_child_type = m_die_to_type[src_die];
5540                     if (src_child_type)
5541                     {
5542                         if (log)
5543                             log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5544                         m_die_to_type[dst_die] = src_child_type;
5545                     }
5546                     else
5547                     {
5548                         if (log)
5549                             log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5550                     }
5551                 }
5552                 else
5553                 {
5554                     if (log)
5555                         log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5556 
5557                     failures.push_back(dst_die);
5558                 }
5559             }
5560         }
5561     }
5562 
5563     const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5564     const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5565 
5566     UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5567 
5568     if (src_size_artificial && dst_size_artificial)
5569     {
5570         dst_name_to_die_artificial.Sort();
5571 
5572         for (idx = 0; idx < src_size_artificial; ++idx)
5573         {
5574             const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5575             src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5576             dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5577 
5578             if (dst_die)
5579             {
5580                 // Both classes have the artificial types, link them
5581                 clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5582                 if (src_decl_ctx)
5583                 {
5584                     if (log)
5585                         log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5586                     LinkDeclContextToDIE (src_decl_ctx, dst_die);
5587                 }
5588                 else
5589                 {
5590                     if (log)
5591                         log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5592                 }
5593 
5594                 Type *src_child_type = m_die_to_type[src_die];
5595                 if (src_child_type)
5596                 {
5597                     if (log)
5598                         log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5599                     m_die_to_type[dst_die] = src_child_type;
5600                 }
5601                 else
5602                 {
5603                     if (log)
5604                         log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5605                 }
5606             }
5607         }
5608     }
5609 
5610     if (dst_size_artificial)
5611     {
5612         for (idx = 0; idx < dst_size_artificial; ++idx)
5613         {
5614             const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5615             dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5616             if (log)
5617                 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5618 
5619             failures.push_back(dst_die);
5620         }
5621     }
5622 
5623     return (failures.size() != 0);
5624 }
5625 
5626 TypeSP
5627 SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5628 {
5629     TypeSP type_sp;
5630 
5631     if (type_is_new_ptr)
5632         *type_is_new_ptr = false;
5633 
5634 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5635     static DIEStack g_die_stack;
5636     DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5637 #endif
5638 
5639     AccessType accessibility = eAccessNone;
5640     if (die != NULL)
5641     {
5642         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5643         if (log)
5644         {
5645             const DWARFDebugInfoEntry *context_die;
5646             clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5647 
5648             GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5649                         die->GetOffset(),
5650                         context,
5651                         context_die->GetOffset(),
5652                         DW_TAG_value_to_name(die->Tag()),
5653                         die->GetName(this, dwarf_cu));
5654 
5655 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5656             scoped_die_logger.Push (dwarf_cu, die);
5657             g_die_stack.LogDIEs(log, this);
5658 #endif
5659         }
5660 //
5661 //        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5662 //        if (log && dwarf_cu)
5663 //        {
5664 //            StreamString s;
5665 //            die->DumpLocation (this, dwarf_cu, s);
5666 //            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5667 //
5668 //        }
5669 
5670         Type *type_ptr = m_die_to_type.lookup (die);
5671         TypeList* type_list = GetTypeList();
5672         if (type_ptr == NULL)
5673         {
5674             ClangASTContext &ast = GetClangASTContext();
5675             if (type_is_new_ptr)
5676                 *type_is_new_ptr = true;
5677 
5678             const dw_tag_t tag = die->Tag();
5679 
5680             bool is_forward_declaration = false;
5681             DWARFDebugInfoEntry::Attributes attributes;
5682             const char *type_name_cstr = NULL;
5683             ConstString type_name_const_str;
5684             Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5685             uint64_t byte_size = 0;
5686             Declaration decl;
5687 
5688             Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5689             ClangASTType clang_type;
5690 
5691             dw_attr_t attr;
5692 
5693             switch (tag)
5694             {
5695             case DW_TAG_base_type:
5696             case DW_TAG_pointer_type:
5697             case DW_TAG_reference_type:
5698             case DW_TAG_rvalue_reference_type:
5699             case DW_TAG_typedef:
5700             case DW_TAG_const_type:
5701             case DW_TAG_restrict_type:
5702             case DW_TAG_volatile_type:
5703             case DW_TAG_unspecified_type:
5704                 {
5705                     // Set a bit that lets us know that we are currently parsing this
5706                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5707 
5708                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5709                     uint32_t encoding = 0;
5710                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5711 
5712                     if (num_attributes > 0)
5713                     {
5714                         uint32_t i;
5715                         for (i=0; i<num_attributes; ++i)
5716                         {
5717                             attr = attributes.AttributeAtIndex(i);
5718                             DWARFFormValue form_value;
5719                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5720                             {
5721                                 switch (attr)
5722                                 {
5723                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5724                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5725                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5726                                 case DW_AT_name:
5727 
5728                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5729                                     // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5730                                     // include the "&"...
5731                                     if (tag == DW_TAG_reference_type)
5732                                     {
5733                                         if (strchr (type_name_cstr, '&') == NULL)
5734                                             type_name_cstr = NULL;
5735                                     }
5736                                     if (type_name_cstr)
5737                                         type_name_const_str.SetCString(type_name_cstr);
5738                                     break;
5739                                 case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5740                                 case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5741                                 case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
5742                                 default:
5743                                 case DW_AT_sibling:
5744                                     break;
5745                                 }
5746                             }
5747                         }
5748                     }
5749 
5750                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5751 
5752                     switch (tag)
5753                     {
5754                     default:
5755                         break;
5756 
5757                     case DW_TAG_unspecified_type:
5758                         if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5759                             strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5760                         {
5761                             resolve_state = Type::eResolveStateFull;
5762                             clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5763                             break;
5764                         }
5765                         // Fall through to base type below in case we can handle the type there...
5766 
5767                     case DW_TAG_base_type:
5768                         resolve_state = Type::eResolveStateFull;
5769                         clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5770                                                                                    encoding,
5771                                                                                    byte_size * 8);
5772                         break;
5773 
5774                     case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5775                     case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5776                     case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5777                     case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5778                     case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5779                     case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5780                     case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5781                     }
5782 
5783                     if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5784                     {
5785                         bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5786 
5787                         if (translation_unit_is_objc)
5788                         {
5789                             if (type_name_cstr != NULL)
5790                             {
5791                                 static ConstString g_objc_type_name_id("id");
5792                                 static ConstString g_objc_type_name_Class("Class");
5793                                 static ConstString g_objc_type_name_selector("SEL");
5794 
5795                                 if (type_name_const_str == g_objc_type_name_id)
5796                                 {
5797                                     if (log)
5798                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5799                                                                                   die->GetOffset(),
5800                                                                                   DW_TAG_value_to_name(die->Tag()),
5801                                                                                   die->GetName(this, dwarf_cu));
5802                                     clang_type = ast.GetBasicType(eBasicTypeObjCID);
5803                                     encoding_data_type = Type::eEncodingIsUID;
5804                                     encoding_uid = LLDB_INVALID_UID;
5805                                     resolve_state = Type::eResolveStateFull;
5806 
5807                                 }
5808                                 else if (type_name_const_str == g_objc_type_name_Class)
5809                                 {
5810                                     if (log)
5811                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5812                                                                                   die->GetOffset(),
5813                                                                                   DW_TAG_value_to_name(die->Tag()),
5814                                                                                   die->GetName(this, dwarf_cu));
5815                                     clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5816                                     encoding_data_type = Type::eEncodingIsUID;
5817                                     encoding_uid = LLDB_INVALID_UID;
5818                                     resolve_state = Type::eResolveStateFull;
5819                                 }
5820                                 else if (type_name_const_str == g_objc_type_name_selector)
5821                                 {
5822                                     if (log)
5823                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5824                                                                                   die->GetOffset(),
5825                                                                                   DW_TAG_value_to_name(die->Tag()),
5826                                                                                   die->GetName(this, dwarf_cu));
5827                                     clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5828                                     encoding_data_type = Type::eEncodingIsUID;
5829                                     encoding_uid = LLDB_INVALID_UID;
5830                                     resolve_state = Type::eResolveStateFull;
5831                                 }
5832                             }
5833                             else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5834                             {
5835                                 // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5836 
5837                                 DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5838 
5839                                 if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5840                                 {
5841                                     if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5842                                     {
5843                                         if (!strcmp(struct_name, "objc_object"))
5844                                         {
5845                                             if (log)
5846                                                 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5847                                                                                           die->GetOffset(),
5848                                                                                           DW_TAG_value_to_name(die->Tag()),
5849                                                                                           die->GetName(this, dwarf_cu));
5850                                             clang_type = ast.GetBasicType(eBasicTypeObjCID);
5851                                             encoding_data_type = Type::eEncodingIsUID;
5852                                             encoding_uid = LLDB_INVALID_UID;
5853                                             resolve_state = Type::eResolveStateFull;
5854                                         }
5855                                     }
5856                                 }
5857                             }
5858                         }
5859                     }
5860 
5861                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5862                                              this,
5863                                              type_name_const_str,
5864                                              byte_size,
5865                                              NULL,
5866                                              encoding_uid,
5867                                              encoding_data_type,
5868                                              &decl,
5869                                              clang_type,
5870                                              resolve_state));
5871 
5872                     m_die_to_type[die] = type_sp.get();
5873 
5874 //                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5875 //                  if (encoding_type != NULL)
5876 //                  {
5877 //                      if (encoding_type != DIE_IS_BEING_PARSED)
5878 //                          type_sp->SetEncodingType(encoding_type);
5879 //                      else
5880 //                          m_indirect_fixups.push_back(type_sp.get());
5881 //                  }
5882                 }
5883                 break;
5884 
5885             case DW_TAG_structure_type:
5886             case DW_TAG_union_type:
5887             case DW_TAG_class_type:
5888                 {
5889                     // Set a bit that lets us know that we are currently parsing this
5890                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5891                     bool byte_size_valid = false;
5892 
5893                     LanguageType class_language = eLanguageTypeUnknown;
5894                     bool is_complete_objc_class = false;
5895                     //bool struct_is_class = false;
5896                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5897                     if (num_attributes > 0)
5898                     {
5899                         uint32_t i;
5900                         for (i=0; i<num_attributes; ++i)
5901                         {
5902                             attr = attributes.AttributeAtIndex(i);
5903                             DWARFFormValue form_value;
5904                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5905                             {
5906                                 switch (attr)
5907                                 {
5908                                 case DW_AT_decl_file:
5909                                     if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
5910                                     {
5911                                         // llvm-gcc outputs invalid DW_AT_decl_file attributes that always
5912                                         // point to the compile unit file, so we clear this invalid value
5913                                         // so that we can still unique types efficiently.
5914                                         decl.SetFile(FileSpec ("<invalid>", false));
5915                                     }
5916                                     else
5917                                         decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
5918                                     break;
5919 
5920                                 case DW_AT_decl_line:
5921                                     decl.SetLine(form_value.Unsigned());
5922                                     break;
5923 
5924                                 case DW_AT_decl_column:
5925                                     decl.SetColumn(form_value.Unsigned());
5926                                     break;
5927 
5928                                 case DW_AT_name:
5929                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5930                                     type_name_const_str.SetCString(type_name_cstr);
5931                                     break;
5932 
5933                                 case DW_AT_byte_size:
5934                                     byte_size = form_value.Unsigned();
5935                                     byte_size_valid = true;
5936                                     break;
5937 
5938                                 case DW_AT_accessibility:
5939                                     accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
5940                                     break;
5941 
5942                                 case DW_AT_declaration:
5943                                     is_forward_declaration = form_value.Boolean();
5944                                     break;
5945 
5946                                 case DW_AT_APPLE_runtime_class:
5947                                     class_language = (LanguageType)form_value.Signed();
5948                                     break;
5949 
5950                                 case DW_AT_APPLE_objc_complete_type:
5951                                     is_complete_objc_class = form_value.Signed();
5952                                     break;
5953 
5954                                 case DW_AT_allocated:
5955                                 case DW_AT_associated:
5956                                 case DW_AT_data_location:
5957                                 case DW_AT_description:
5958                                 case DW_AT_start_scope:
5959                                 case DW_AT_visibility:
5960                                 default:
5961                                 case DW_AT_sibling:
5962                                     break;
5963                                 }
5964                             }
5965                         }
5966                     }
5967 
5968                     UniqueDWARFASTType unique_ast_entry;
5969 
5970                     // Only try and unique the type if it has a name.
5971                     if (type_name_const_str &&
5972                         GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
5973                                                          this,
5974                                                          dwarf_cu,
5975                                                          die,
5976                                                          decl,
5977                                                          byte_size_valid ? byte_size : -1,
5978                                                          unique_ast_entry))
5979                     {
5980                         // We have already parsed this type or from another
5981                         // compile unit. GCC loves to use the "one definition
5982                         // rule" which can result in multiple definitions
5983                         // of the same class over and over in each compile
5984                         // unit.
5985                         type_sp = unique_ast_entry.m_type_sp;
5986                         if (type_sp)
5987                         {
5988                             m_die_to_type[die] = type_sp.get();
5989                             return type_sp;
5990                         }
5991                     }
5992 
5993                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
5994 
5995                     int tag_decl_kind = -1;
5996                     AccessType default_accessibility = eAccessNone;
5997                     if (tag == DW_TAG_structure_type)
5998                     {
5999                         tag_decl_kind = clang::TTK_Struct;
6000                         default_accessibility = eAccessPublic;
6001                     }
6002                     else if (tag == DW_TAG_union_type)
6003                     {
6004                         tag_decl_kind = clang::TTK_Union;
6005                         default_accessibility = eAccessPublic;
6006                     }
6007                     else if (tag == DW_TAG_class_type)
6008                     {
6009                         tag_decl_kind = clang::TTK_Class;
6010                         default_accessibility = eAccessPrivate;
6011                     }
6012 
6013                     if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6014                         die->HasChildren() == false &&
6015                         sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6016                     {
6017                         // Work around an issue with clang at the moment where
6018                         // forward declarations for objective C classes are emitted
6019                         // as:
6020                         //  DW_TAG_structure_type [2]
6021                         //  DW_AT_name( "ForwardObjcClass" )
6022                         //  DW_AT_byte_size( 0x00 )
6023                         //  DW_AT_decl_file( "..." )
6024                         //  DW_AT_decl_line( 1 )
6025                         //
6026                         // Note that there is no DW_AT_declaration and there are
6027                         // no children, and the byte size is zero.
6028                         is_forward_declaration = true;
6029                     }
6030 
6031                     if (class_language == eLanguageTypeObjC ||
6032                         class_language == eLanguageTypeObjC_plus_plus)
6033                     {
6034                         if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6035                         {
6036                             // We have a valid eSymbolTypeObjCClass class symbol whose
6037                             // name matches the current objective C class that we
6038                             // are trying to find and this DIE isn't the complete
6039                             // definition (we checked is_complete_objc_class above and
6040                             // know it is false), so the real definition is in here somewhere
6041                             type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6042 
6043                             if (!type_sp && GetDebugMapSymfile ())
6044                             {
6045                                 // We weren't able to find a full declaration in
6046                                 // this DWARF, see if we have a declaration anywhere
6047                                 // else...
6048                                 type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6049                             }
6050 
6051                             if (type_sp)
6052                             {
6053                                 if (log)
6054                                 {
6055                                     GetObjectFile()->GetModule()->LogMessage (log,
6056                                                                               "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6057                                                                               this,
6058                                                                               die->GetOffset(),
6059                                                                               DW_TAG_value_to_name(tag),
6060                                                                               type_name_cstr,
6061                                                                               type_sp->GetID());
6062                                 }
6063 
6064                                 // We found a real definition for this type elsewhere
6065                                 // so lets use it and cache the fact that we found
6066                                 // a complete type for this die
6067                                 m_die_to_type[die] = type_sp.get();
6068                                 return type_sp;
6069                             }
6070                         }
6071                     }
6072 
6073 
6074                     if (is_forward_declaration)
6075                     {
6076                         // We have a forward declaration to a type and we need
6077                         // to try and find a full declaration. We look in the
6078                         // current type index just in case we have a forward
6079                         // declaration followed by an actual declarations in the
6080                         // DWARF. If this fails, we need to look elsewhere...
6081                         if (log)
6082                         {
6083                             GetObjectFile()->GetModule()->LogMessage (log,
6084                                                                       "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6085                                                                       this,
6086                                                                       die->GetOffset(),
6087                                                                       DW_TAG_value_to_name(tag),
6088                                                                       type_name_cstr);
6089                         }
6090 
6091                         DWARFDeclContext die_decl_ctx;
6092                         die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6093 
6094                         //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6095                         type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6096 
6097                         if (!type_sp && GetDebugMapSymfile ())
6098                         {
6099                             // We weren't able to find a full declaration in
6100                             // this DWARF, see if we have a declaration anywhere
6101                             // else...
6102                             type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6103                         }
6104 
6105                         if (type_sp)
6106                         {
6107                             if (log)
6108                             {
6109                                 GetObjectFile()->GetModule()->LogMessage (log,
6110                                                                           "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6111                                                                           this,
6112                                                                           die->GetOffset(),
6113                                                                           DW_TAG_value_to_name(tag),
6114                                                                           type_name_cstr,
6115                                                                           type_sp->GetID());
6116                             }
6117 
6118                             // We found a real definition for this type elsewhere
6119                             // so lets use it and cache the fact that we found
6120                             // a complete type for this die
6121                             m_die_to_type[die] = type_sp.get();
6122                             return type_sp;
6123                         }
6124                     }
6125                     assert (tag_decl_kind != -1);
6126                     bool clang_type_was_created = false;
6127                     clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6128                     if (!clang_type)
6129                     {
6130                         const DWARFDebugInfoEntry *decl_ctx_die;
6131 
6132                         clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6133                         if (accessibility == eAccessNone && decl_ctx)
6134                         {
6135                             // Check the decl context that contains this class/struct/union.
6136                             // If it is a class we must give it an accessability.
6137                             const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6138                             if (DeclKindIsCXXClass (containing_decl_kind))
6139                                 accessibility = default_accessibility;
6140                         }
6141 
6142                         ClangASTMetadata metadata;
6143                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6144                         metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6145 
6146                         if (type_name_cstr && strchr (type_name_cstr, '<'))
6147                         {
6148                             ClangASTContext::TemplateParameterInfos template_param_infos;
6149                             if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6150                             {
6151                                 clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6152                                                                                                         accessibility,
6153                                                                                                         type_name_cstr,
6154                                                                                                         tag_decl_kind,
6155                                                                                                         template_param_infos);
6156 
6157                                 clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6158                                                                                                                                                class_template_decl,
6159                                                                                                                                                tag_decl_kind,
6160                                                                                                                                                template_param_infos);
6161                                 clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6162                                 clang_type_was_created = true;
6163 
6164                                 GetClangASTContext().SetMetadata (class_template_decl, metadata);
6165                                 GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6166                             }
6167                         }
6168 
6169                         if (!clang_type_was_created)
6170                         {
6171                             clang_type_was_created = true;
6172                             clang_type = ast.CreateRecordType (decl_ctx,
6173                                                                accessibility,
6174                                                                type_name_cstr,
6175                                                                tag_decl_kind,
6176                                                                class_language,
6177                                                                &metadata);
6178                         }
6179                     }
6180 
6181                     // Store a forward declaration to this class type in case any
6182                     // parameters in any class methods need it for the clang
6183                     // types for function prototypes.
6184                     LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6185                     type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6186                                              this,
6187                                              type_name_const_str,
6188                                              byte_size,
6189                                              NULL,
6190                                              LLDB_INVALID_UID,
6191                                              Type::eEncodingIsUID,
6192                                              &decl,
6193                                              clang_type,
6194                                              Type::eResolveStateForward));
6195 
6196                     type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6197 
6198 
6199                     // Add our type to the unique type map so we don't
6200                     // end up creating many copies of the same type over
6201                     // and over in the ASTContext for our module
6202                     unique_ast_entry.m_type_sp = type_sp;
6203                     unique_ast_entry.m_symfile = this;
6204                     unique_ast_entry.m_cu = dwarf_cu;
6205                     unique_ast_entry.m_die = die;
6206                     unique_ast_entry.m_declaration = decl;
6207                     unique_ast_entry.m_byte_size = byte_size;
6208                     GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6209                                                        unique_ast_entry);
6210 
6211                     if (is_forward_declaration && die->HasChildren())
6212                     {
6213                         // Check to see if the DIE actually has a definition, some version of GCC will
6214                         // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6215                         // members, or inheritance, so we can't trust it
6216                         const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6217                         while (child_die)
6218                         {
6219                             switch (child_die->Tag())
6220                             {
6221                                 case DW_TAG_inheritance:
6222                                 case DW_TAG_subprogram:
6223                                 case DW_TAG_member:
6224                                 case DW_TAG_APPLE_property:
6225                                     child_die = NULL;
6226                                     is_forward_declaration = false;
6227                                     break;
6228                                 default:
6229                                     child_die = child_die->GetSibling();
6230                                     break;
6231                             }
6232                         }
6233                     }
6234 
6235                     if (!is_forward_declaration)
6236                     {
6237                         // Always start the definition for a class type so that
6238                         // if the class has child classes or types that require
6239                         // the class to be created for use as their decl contexts
6240                         // the class will be ready to accept these child definitions.
6241                         if (die->HasChildren() == false)
6242                         {
6243                             // No children for this struct/union/class, lets finish it
6244                             clang_type.StartTagDeclarationDefinition ();
6245                             clang_type.CompleteTagDeclarationDefinition ();
6246 
6247                             if (tag == DW_TAG_structure_type) // this only applies in C
6248                             {
6249                                 clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6250 
6251                                 if (record_decl)
6252                                 {
6253                                     LayoutInfo layout_info;
6254 
6255                                     layout_info.alignment = 0;
6256                                     layout_info.bit_size = 0;
6257 
6258                                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
6259                                 }
6260                             }
6261                         }
6262                         else if (clang_type_was_created)
6263                         {
6264                             // Start the definition if the class is not objective C since
6265                             // the underlying decls respond to isCompleteDefinition(). Objective
6266                             // C decls dont' respond to isCompleteDefinition() so we can't
6267                             // start the declaration definition right away. For C++ classs/union/structs
6268                             // we want to start the definition in case the class is needed as the
6269                             // declaration context for a contained class or type without the need
6270                             // to complete that type..
6271 
6272                             if (class_language != eLanguageTypeObjC &&
6273                                 class_language != eLanguageTypeObjC_plus_plus)
6274                                 clang_type.StartTagDeclarationDefinition ();
6275 
6276                             // Leave this as a forward declaration until we need
6277                             // to know the details of the type. lldb_private::Type
6278                             // will automatically call the SymbolFile virtual function
6279                             // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6280                             // When the definition needs to be defined.
6281                             m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6282                             m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6283                             clang_type.SetHasExternalStorage (true);
6284                         }
6285                     }
6286 
6287                 }
6288                 break;
6289 
6290             case DW_TAG_enumeration_type:
6291                 {
6292                     // Set a bit that lets us know that we are currently parsing this
6293                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6294 
6295                     lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6296 
6297                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6298                     if (num_attributes > 0)
6299                     {
6300                         uint32_t i;
6301 
6302                         for (i=0; i<num_attributes; ++i)
6303                         {
6304                             attr = attributes.AttributeAtIndex(i);
6305                             DWARFFormValue form_value;
6306                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6307                             {
6308                                 switch (attr)
6309                                 {
6310                                 case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6311                                 case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6312                                 case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6313                                 case DW_AT_name:
6314                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6315                                     type_name_const_str.SetCString(type_name_cstr);
6316                                     break;
6317                                 case DW_AT_type:            encoding_uid = form_value.Reference(dwarf_cu); break;
6318                                 case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6319                                 case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6320                                 case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6321                                 case DW_AT_allocated:
6322                                 case DW_AT_associated:
6323                                 case DW_AT_bit_stride:
6324                                 case DW_AT_byte_stride:
6325                                 case DW_AT_data_location:
6326                                 case DW_AT_description:
6327                                 case DW_AT_start_scope:
6328                                 case DW_AT_visibility:
6329                                 case DW_AT_specification:
6330                                 case DW_AT_abstract_origin:
6331                                 case DW_AT_sibling:
6332                                     break;
6333                                 }
6334                             }
6335                         }
6336 
6337                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6338 
6339                         ClangASTType enumerator_clang_type;
6340                         clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6341                         if (!clang_type)
6342                         {
6343                             if (encoding_uid != DW_INVALID_OFFSET)
6344                             {
6345                                 Type *enumerator_type = ResolveTypeUID(encoding_uid);
6346                                 if (enumerator_type)
6347                                     enumerator_clang_type = enumerator_type->GetClangFullType();
6348                             }
6349 
6350                             if (!enumerator_clang_type)
6351                                 enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6352                                                                                                       DW_ATE_signed,
6353                                                                                                       byte_size * 8);
6354 
6355                             clang_type = ast.CreateEnumerationType (type_name_cstr,
6356                                                                     GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6357                                                                     decl,
6358                                                                     enumerator_clang_type);
6359                         }
6360                         else
6361                         {
6362                             enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6363                         }
6364 
6365                         LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6366 
6367                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6368                                                  this,
6369                                                  type_name_const_str,
6370                                                  byte_size,
6371                                                  NULL,
6372                                                  encoding_uid,
6373                                                  Type::eEncodingIsUID,
6374                                                  &decl,
6375                                                  clang_type,
6376                                                  Type::eResolveStateForward));
6377 
6378                         clang_type.StartTagDeclarationDefinition ();
6379                         if (die->HasChildren())
6380                         {
6381                             SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6382                             bool is_signed = false;
6383                             enumerator_clang_type.IsIntegerType(is_signed);
6384                             ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6385                         }
6386                         clang_type.CompleteTagDeclarationDefinition ();
6387                     }
6388                 }
6389                 break;
6390 
6391             case DW_TAG_inlined_subroutine:
6392             case DW_TAG_subprogram:
6393             case DW_TAG_subroutine_type:
6394                 {
6395                     // Set a bit that lets us know that we are currently parsing this
6396                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6397 
6398                     //const char *mangled = NULL;
6399                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6400                     bool is_variadic = false;
6401                     bool is_inline = false;
6402                     bool is_static = false;
6403                     bool is_virtual = false;
6404                     bool is_explicit = false;
6405                     bool is_artificial = false;
6406                     dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6407                     dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6408                     dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6409 
6410                     unsigned type_quals = 0;
6411                     clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6412 
6413 
6414                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6415                     if (num_attributes > 0)
6416                     {
6417                         uint32_t i;
6418                         for (i=0; i<num_attributes; ++i)
6419                         {
6420                             attr = attributes.AttributeAtIndex(i);
6421                             DWARFFormValue form_value;
6422                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6423                             {
6424                                 switch (attr)
6425                                 {
6426                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6427                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6428                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6429                                 case DW_AT_name:
6430                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6431                                     type_name_const_str.SetCString(type_name_cstr);
6432                                     break;
6433 
6434                                 case DW_AT_linkage_name:
6435                                 case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6436                                 case DW_AT_type:                type_die_offset = form_value.Reference(dwarf_cu); break;
6437                                 case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6438                                 case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6439                                 case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6440                                 case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6441                                 case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6442                                 case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6443 
6444 
6445                                 case DW_AT_external:
6446                                     if (form_value.Unsigned())
6447                                     {
6448                                         if (storage == clang::SC_None)
6449                                             storage = clang::SC_Extern;
6450                                         else
6451                                             storage = clang::SC_PrivateExtern;
6452                                     }
6453                                     break;
6454 
6455                                 case DW_AT_specification:
6456                                     specification_die_offset = form_value.Reference(dwarf_cu);
6457                                     break;
6458 
6459                                 case DW_AT_abstract_origin:
6460                                     abstract_origin_die_offset = form_value.Reference(dwarf_cu);
6461                                     break;
6462 
6463                                 case DW_AT_object_pointer:
6464                                     object_pointer_die_offset = form_value.Reference(dwarf_cu);
6465                                     break;
6466 
6467                                 case DW_AT_allocated:
6468                                 case DW_AT_associated:
6469                                 case DW_AT_address_class:
6470                                 case DW_AT_calling_convention:
6471                                 case DW_AT_data_location:
6472                                 case DW_AT_elemental:
6473                                 case DW_AT_entry_pc:
6474                                 case DW_AT_frame_base:
6475                                 case DW_AT_high_pc:
6476                                 case DW_AT_low_pc:
6477                                 case DW_AT_prototyped:
6478                                 case DW_AT_pure:
6479                                 case DW_AT_ranges:
6480                                 case DW_AT_recursive:
6481                                 case DW_AT_return_addr:
6482                                 case DW_AT_segment:
6483                                 case DW_AT_start_scope:
6484                                 case DW_AT_static_link:
6485                                 case DW_AT_trampoline:
6486                                 case DW_AT_visibility:
6487                                 case DW_AT_vtable_elem_location:
6488                                 case DW_AT_description:
6489                                 case DW_AT_sibling:
6490                                     break;
6491                                 }
6492                             }
6493                         }
6494                     }
6495 
6496                     std::string object_pointer_name;
6497                     if (object_pointer_die_offset != DW_INVALID_OFFSET)
6498                     {
6499                         // Get the name from the object pointer die
6500                         StreamString s;
6501                         if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6502                         {
6503                             object_pointer_name.assign(s.GetData());
6504                         }
6505                     }
6506 
6507                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6508 
6509                     ClangASTType return_clang_type;
6510                     Type *func_type = NULL;
6511 
6512                     if (type_die_offset != DW_INVALID_OFFSET)
6513                         func_type = ResolveTypeUID(type_die_offset);
6514 
6515                     if (func_type)
6516                         return_clang_type = func_type->GetClangForwardType();
6517                     else
6518                         return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6519 
6520 
6521                     std::vector<ClangASTType> function_param_types;
6522                     std::vector<clang::ParmVarDecl*> function_param_decls;
6523 
6524                     // Parse the function children for the parameters
6525 
6526                     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6527                     clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6528                     const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6529 
6530                     const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6531                     // Start off static. This will be set to false in ParseChildParameters(...)
6532                     // if we find a "this" paramters as the first parameter
6533                     if (is_cxx_method)
6534                         is_static = true;
6535                     ClangASTContext::TemplateParameterInfos template_param_infos;
6536 
6537                     if (die->HasChildren())
6538                     {
6539                         bool skip_artificial = true;
6540                         ParseChildParameters (sc,
6541                                               containing_decl_ctx,
6542                                               dwarf_cu,
6543                                               die,
6544                                               skip_artificial,
6545                                               is_static,
6546                                               type_list,
6547                                               function_param_types,
6548                                               function_param_decls,
6549                                               type_quals,
6550                                               template_param_infos);
6551                     }
6552 
6553                     // clang_type will get the function prototype clang type after this call
6554                     clang_type = ast.CreateFunctionType (return_clang_type,
6555                                                          function_param_types.data(),
6556                                                          function_param_types.size(),
6557                                                          is_variadic,
6558                                                          type_quals);
6559 
6560                     bool ignore_containing_context = false;
6561 
6562                     if (type_name_cstr)
6563                     {
6564                         bool type_handled = false;
6565                         if (tag == DW_TAG_subprogram)
6566                         {
6567                             ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6568                             if (objc_method.IsValid(true))
6569                             {
6570                                 SymbolContext empty_sc;
6571                                 ClangASTType class_opaque_type;
6572                                 ConstString class_name(objc_method.GetClassName());
6573                                 if (class_name)
6574                                 {
6575                                     TypeList types;
6576                                     TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6577 
6578                                     if (complete_objc_class_type_sp)
6579                                     {
6580                                         ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6581                                         if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6582                                             class_opaque_type = type_clang_forward_type;
6583                                     }
6584                                 }
6585 
6586                                 if (class_opaque_type)
6587                                 {
6588                                     // If accessibility isn't set to anything valid, assume public for
6589                                     // now...
6590                                     if (accessibility == eAccessNone)
6591                                         accessibility = eAccessPublic;
6592 
6593                                     clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6594                                                                                                                            clang_type,
6595                                                                                                                            accessibility,
6596                                                                                                                            is_artificial);
6597                                     type_handled = objc_method_decl != NULL;
6598                                     if (type_handled)
6599                                     {
6600                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6601                                         GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6602                                     }
6603                                     else
6604                                     {
6605                                         GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
6606                                                                                    die->GetOffset(),
6607                                                                                    tag,
6608                                                                                    DW_TAG_value_to_name(tag));
6609                                     }
6610                                 }
6611                             }
6612                             else if (is_cxx_method)
6613                             {
6614                                 // Look at the parent of this DIE and see if is is
6615                                 // a class or struct and see if this is actually a
6616                                 // C++ method
6617                                 Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6618                                 if (class_type)
6619                                 {
6620                                     if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6621                                     {
6622                                         // We uniqued the parent class of this function to another class
6623                                         // so we now need to associate all dies under "decl_ctx_die" to
6624                                         // DIEs in the DIE for "class_type"...
6625                                         SymbolFileDWARF *class_symfile = NULL;
6626                                         DWARFCompileUnitSP class_type_cu_sp;
6627                                         const DWARFDebugInfoEntry *class_type_die = NULL;
6628 
6629                                         SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6630                                         if (debug_map_symfile)
6631                                         {
6632                                             class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6633                                             class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6634                                         }
6635                                         else
6636                                         {
6637                                             class_symfile = this;
6638                                             class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6639                                         }
6640                                         if (class_type_die)
6641                                         {
6642                                             llvm::SmallVector<const DWARFDebugInfoEntry *, 0> failures;
6643 
6644                                             CopyUniqueClassMethodTypes (class_symfile,
6645                                                                         class_type,
6646                                                                         class_type_cu_sp.get(),
6647                                                                         class_type_die,
6648                                                                         dwarf_cu,
6649                                                                         decl_ctx_die,
6650                                                                         failures);
6651 
6652                                             // FIXME do something with these failures that's smarter than
6653                                             // just dropping them on the ground.  Unfortunately classes don't
6654                                             // like having stuff added to them after their definitions are
6655                                             // complete...
6656 
6657                                             type_ptr = m_die_to_type[die];
6658                                             if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6659                                             {
6660                                                 type_sp = type_ptr->shared_from_this();
6661                                                 break;
6662                                             }
6663                                         }
6664                                     }
6665 
6666                                     if (specification_die_offset != DW_INVALID_OFFSET)
6667                                     {
6668                                         // We have a specification which we are going to base our function
6669                                         // prototype off of, so we need this type to be completed so that the
6670                                         // m_die_to_decl_ctx for the method in the specification has a valid
6671                                         // clang decl context.
6672                                         class_type->GetClangForwardType();
6673                                         // If we have a specification, then the function type should have been
6674                                         // made with the specification and not with this die.
6675                                         DWARFCompileUnitSP spec_cu_sp;
6676                                         const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6677                                         clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6678                                         if (spec_clang_decl_ctx)
6679                                         {
6680                                             LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6681                                         }
6682                                         else
6683                                         {
6684                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6685                                                                                          MakeUserID(die->GetOffset()),
6686                                                                                          specification_die_offset);
6687                                         }
6688                                         type_handled = true;
6689                                     }
6690                                     else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6691                                     {
6692                                         // We have a specification which we are going to base our function
6693                                         // prototype off of, so we need this type to be completed so that the
6694                                         // m_die_to_decl_ctx for the method in the abstract origin has a valid
6695                                         // clang decl context.
6696                                         class_type->GetClangForwardType();
6697 
6698                                         DWARFCompileUnitSP abs_cu_sp;
6699                                         const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6700                                         clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6701                                         if (abs_clang_decl_ctx)
6702                                         {
6703                                             LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6704                                         }
6705                                         else
6706                                         {
6707                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6708                                                                                          MakeUserID(die->GetOffset()),
6709                                                                                          abstract_origin_die_offset);
6710                                         }
6711                                         type_handled = true;
6712                                     }
6713                                     else
6714                                     {
6715                                         ClangASTType class_opaque_type = class_type->GetClangForwardType();
6716                                         if (class_opaque_type.IsCXXClassType ())
6717                                         {
6718                                             if (class_opaque_type.IsBeingDefined ())
6719                                             {
6720                                                 // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6721                                                 // in the DWARF for C++ methods... Default to public for now...
6722                                                 if (accessibility == eAccessNone)
6723                                                     accessibility = eAccessPublic;
6724 
6725                                                 if (!is_static && !die->HasChildren())
6726                                                 {
6727                                                     // We have a C++ member function with no children (this pointer!)
6728                                                     // and clang will get mad if we try and make a function that isn't
6729                                                     // well formed in the DWARF, so we will just skip it...
6730                                                     type_handled = true;
6731                                                 }
6732                                                 else
6733                                                 {
6734                                                     clang::CXXMethodDecl *cxx_method_decl;
6735                                                     // REMOVE THE CRASH DESCRIPTION BELOW
6736                                                     Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6737                                                                                          type_name_cstr,
6738                                                                                          class_type->GetName().GetCString(),
6739                                                                                          MakeUserID(die->GetOffset()),
6740                                                                                          m_obj_file->GetFileSpec().GetPath().c_str());
6741 
6742                                                     const bool is_attr_used = false;
6743 
6744                                                     cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6745                                                                                                                   clang_type,
6746                                                                                                                   accessibility,
6747                                                                                                                   is_virtual,
6748                                                                                                                   is_static,
6749                                                                                                                   is_inline,
6750                                                                                                                   is_explicit,
6751                                                                                                                   is_attr_used,
6752                                                                                                                   is_artificial);
6753 
6754                                                     type_handled = cxx_method_decl != NULL;
6755 
6756                                                     if (type_handled)
6757                                                     {
6758                                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6759 
6760                                                         Host::SetCrashDescription (NULL);
6761 
6762 
6763                                                         ClangASTMetadata metadata;
6764                                                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6765 
6766                                                         if (!object_pointer_name.empty())
6767                                                         {
6768                                                             metadata.SetObjectPtrName(object_pointer_name.c_str());
6769                                                             if (log)
6770                                                                 log->Printf ("Setting object pointer name: %s on method object %p.\n",
6771                                                                              object_pointer_name.c_str(),
6772                                                                              cxx_method_decl);
6773                                                         }
6774                                                         GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6775                                                     }
6776                                                     else
6777                                                     {
6778                                                         ignore_containing_context = true;
6779                                                     }
6780                                                 }
6781                                             }
6782                                             else
6783                                             {
6784                                                 // We were asked to parse the type for a method in a class, yet the
6785                                                 // class hasn't been asked to complete itself through the
6786                                                 // clang::ExternalASTSource protocol, so we need to just have the
6787                                                 // class complete itself and do things the right way, then our
6788                                                 // DIE should then have an entry in the m_die_to_type map. First
6789                                                 // we need to modify the m_die_to_type so it doesn't think we are
6790                                                 // trying to parse this DIE anymore...
6791                                                 m_die_to_type[die] = NULL;
6792 
6793                                                 // Now we get the full type to force our class type to complete itself
6794                                                 // using the clang::ExternalASTSource protocol which will parse all
6795                                                 // base classes and all methods (including the method for this DIE).
6796                                                 class_type->GetClangFullType();
6797 
6798                                                 // The type for this DIE should have been filled in the function call above
6799                                                 type_ptr = m_die_to_type[die];
6800                                                 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6801                                                 {
6802                                                     type_sp = type_ptr->shared_from_this();
6803                                                     break;
6804                                                 }
6805 
6806                                                 // FIXME This is fixing some even uglier behavior but we really need to
6807                                                 // uniq the methods of each class as well as the class itself.
6808                                                 // <rdar://problem/11240464>
6809                                                 type_handled = true;
6810                                             }
6811                                         }
6812                                     }
6813                                 }
6814                             }
6815                         }
6816 
6817                         if (!type_handled)
6818                         {
6819                             // We just have a function that isn't part of a class
6820                             clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6821                                                                                                 type_name_cstr,
6822                                                                                                 clang_type,
6823                                                                                                 storage,
6824                                                                                                 is_inline);
6825 
6826 //                            if (template_param_infos.GetSize() > 0)
6827 //                            {
6828 //                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6829 //                                                                                                                  function_decl,
6830 //                                                                                                                  type_name_cstr,
6831 //                                                                                                                  template_param_infos);
6832 //
6833 //                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6834 //                                                                              func_template_decl,
6835 //                                                                              template_param_infos);
6836 //                            }
6837                             // Add the decl to our DIE to decl context map
6838                             assert (function_decl);
6839                             LinkDeclContextToDIE(function_decl, die);
6840                             if (!function_param_decls.empty())
6841                                 ast.SetFunctionParameters (function_decl,
6842                                                            &function_param_decls.front(),
6843                                                            function_param_decls.size());
6844 
6845                             ClangASTMetadata metadata;
6846                             metadata.SetUserID(MakeUserID(die->GetOffset()));
6847 
6848                             if (!object_pointer_name.empty())
6849                             {
6850                                 metadata.SetObjectPtrName(object_pointer_name.c_str());
6851                                 if (log)
6852                                     log->Printf ("Setting object pointer name: %s on function object %p.",
6853                                                  object_pointer_name.c_str(),
6854                                                 function_decl);
6855                             }
6856                             GetClangASTContext().SetMetadata (function_decl, metadata);
6857                         }
6858                     }
6859                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6860                                              this,
6861                                              type_name_const_str,
6862                                              0,
6863                                              NULL,
6864                                              LLDB_INVALID_UID,
6865                                              Type::eEncodingIsUID,
6866                                              &decl,
6867                                              clang_type,
6868                                              Type::eResolveStateFull));
6869                     assert(type_sp.get());
6870                 }
6871                 break;
6872 
6873             case DW_TAG_array_type:
6874                 {
6875                     // Set a bit that lets us know that we are currently parsing this
6876                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6877 
6878                     lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6879                     int64_t first_index = 0;
6880                     uint32_t byte_stride = 0;
6881                     uint32_t bit_stride = 0;
6882                     bool is_vector = false;
6883                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6884 
6885                     if (num_attributes > 0)
6886                     {
6887                         uint32_t i;
6888                         for (i=0; i<num_attributes; ++i)
6889                         {
6890                             attr = attributes.AttributeAtIndex(i);
6891                             DWARFFormValue form_value;
6892                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6893                             {
6894                                 switch (attr)
6895                                 {
6896                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6897                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6898                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6899                                 case DW_AT_name:
6900                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6901                                     type_name_const_str.SetCString(type_name_cstr);
6902                                     break;
6903 
6904                                 case DW_AT_type:            type_die_offset = form_value.Reference(dwarf_cu); break;
6905                                 case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
6906                                 case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
6907                                 case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
6908                                 case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
6909                                 case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6910                                 case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
6911                                 case DW_AT_allocated:
6912                                 case DW_AT_associated:
6913                                 case DW_AT_data_location:
6914                                 case DW_AT_description:
6915                                 case DW_AT_ordering:
6916                                 case DW_AT_start_scope:
6917                                 case DW_AT_visibility:
6918                                 case DW_AT_specification:
6919                                 case DW_AT_abstract_origin:
6920                                 case DW_AT_sibling:
6921                                     break;
6922                                 }
6923                             }
6924                         }
6925 
6926                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6927 
6928                         Type *element_type = ResolveTypeUID(type_die_offset);
6929 
6930                         if (element_type)
6931                         {
6932                             std::vector<uint64_t> element_orders;
6933                             ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
6934                             if (byte_stride == 0 && bit_stride == 0)
6935                                 byte_stride = element_type->GetByteSize();
6936                             ClangASTType array_element_type = element_type->GetClangForwardType();
6937                             uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
6938                             uint64_t num_elements = 0;
6939                             std::vector<uint64_t>::const_reverse_iterator pos;
6940                             std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
6941                             for (pos = element_orders.rbegin(); pos != end; ++pos)
6942                             {
6943                                 num_elements = *pos;
6944                                 clang_type = ast.CreateArrayType (array_element_type,
6945                                                                   num_elements,
6946                                                                   is_vector);
6947                                 array_element_type = clang_type;
6948                                 array_element_bit_stride = num_elements ? array_element_bit_stride * num_elements : array_element_bit_stride;
6949                             }
6950                             ConstString empty_name;
6951                             type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6952                                                      this,
6953                                                      empty_name,
6954                                                      array_element_bit_stride / 8,
6955                                                      NULL,
6956                                                      type_die_offset,
6957                                                      Type::eEncodingIsUID,
6958                                                      &decl,
6959                                                      clang_type,
6960                                                      Type::eResolveStateFull));
6961                             type_sp->SetEncodingType (element_type);
6962                         }
6963                     }
6964                 }
6965                 break;
6966 
6967             case DW_TAG_ptr_to_member_type:
6968                 {
6969                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6970                     dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
6971 
6972                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6973 
6974                     if (num_attributes > 0) {
6975                         uint32_t i;
6976                         for (i=0; i<num_attributes; ++i)
6977                         {
6978                             attr = attributes.AttributeAtIndex(i);
6979                             DWARFFormValue form_value;
6980                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6981                             {
6982                                 switch (attr)
6983                                 {
6984                                     case DW_AT_type:
6985                                         type_die_offset = form_value.Reference(dwarf_cu); break;
6986                                     case DW_AT_containing_type:
6987                                         containing_type_die_offset = form_value.Reference(dwarf_cu); break;
6988                                 }
6989                             }
6990                         }
6991 
6992                         Type *pointee_type = ResolveTypeUID(type_die_offset);
6993                         Type *class_type = ResolveTypeUID(containing_type_die_offset);
6994 
6995                         ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
6996                         ClangASTType class_clang_type = class_type->GetClangLayoutType();
6997 
6998                         clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
6999 
7000                         byte_size = clang_type.GetByteSize();
7001 
7002                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7003                                                  this,
7004                                                  type_name_const_str,
7005                                                  byte_size,
7006                                                  NULL,
7007                                                  LLDB_INVALID_UID,
7008                                                  Type::eEncodingIsUID,
7009                                                  NULL,
7010                                                  clang_type,
7011                                                  Type::eResolveStateForward));
7012                     }
7013 
7014                     break;
7015                 }
7016             default:
7017                 GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
7018                                                            die->GetOffset(),
7019                                                            tag,
7020                                                            DW_TAG_value_to_name(tag));
7021                 break;
7022             }
7023 
7024             if (type_sp.get())
7025             {
7026                 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7027                 dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7028 
7029                 SymbolContextScope * symbol_context_scope = NULL;
7030                 if (sc_parent_tag == DW_TAG_compile_unit)
7031                 {
7032                     symbol_context_scope = sc.comp_unit;
7033                 }
7034                 else if (sc.function != NULL)
7035                 {
7036                     symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7037                     if (symbol_context_scope == NULL)
7038                         symbol_context_scope = sc.function;
7039                 }
7040 
7041                 if (symbol_context_scope != NULL)
7042                 {
7043                     type_sp->SetSymbolContextScope(symbol_context_scope);
7044                 }
7045 
7046                 // We are ready to put this type into the uniqued list up at the module level
7047                 type_list->Insert (type_sp);
7048 
7049                 m_die_to_type[die] = type_sp.get();
7050             }
7051         }
7052         else if (type_ptr != DIE_IS_BEING_PARSED)
7053         {
7054             type_sp = type_ptr->shared_from_this();
7055         }
7056     }
7057     return type_sp;
7058 }
7059 
7060 size_t
7061 SymbolFileDWARF::ParseTypes
7062 (
7063     const SymbolContext& sc,
7064     DWARFCompileUnit* dwarf_cu,
7065     const DWARFDebugInfoEntry *die,
7066     bool parse_siblings,
7067     bool parse_children
7068 )
7069 {
7070     size_t types_added = 0;
7071     while (die != NULL)
7072     {
7073         bool type_is_new = false;
7074         if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7075         {
7076             if (type_is_new)
7077                 ++types_added;
7078         }
7079 
7080         if (parse_children && die->HasChildren())
7081         {
7082             if (die->Tag() == DW_TAG_subprogram)
7083             {
7084                 SymbolContext child_sc(sc);
7085                 child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7086                 types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7087             }
7088             else
7089                 types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7090         }
7091 
7092         if (parse_siblings)
7093             die = die->GetSibling();
7094         else
7095             die = NULL;
7096     }
7097     return types_added;
7098 }
7099 
7100 
7101 size_t
7102 SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7103 {
7104     assert(sc.comp_unit && sc.function);
7105     size_t functions_added = 0;
7106     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7107     if (dwarf_cu)
7108     {
7109         dw_offset_t function_die_offset = sc.function->GetID();
7110         const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7111         if (function_die)
7112         {
7113             ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7114         }
7115     }
7116 
7117     return functions_added;
7118 }
7119 
7120 
7121 size_t
7122 SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7123 {
7124     // At least a compile unit must be valid
7125     assert(sc.comp_unit);
7126     size_t types_added = 0;
7127     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7128     if (dwarf_cu)
7129     {
7130         if (sc.function)
7131         {
7132             dw_offset_t function_die_offset = sc.function->GetID();
7133             const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7134             if (func_die && func_die->HasChildren())
7135             {
7136                 types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7137             }
7138         }
7139         else
7140         {
7141             const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7142             if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7143             {
7144                 types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7145             }
7146         }
7147     }
7148 
7149     return types_added;
7150 }
7151 
7152 size_t
7153 SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7154 {
7155     if (sc.comp_unit != NULL)
7156     {
7157         DWARFDebugInfo* info = DebugInfo();
7158         if (info == NULL)
7159             return 0;
7160 
7161         if (sc.function)
7162         {
7163             DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7164 
7165             if (dwarf_cu == NULL)
7166                 return 0;
7167 
7168             const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7169 
7170             dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7171             if (func_lo_pc != LLDB_INVALID_ADDRESS)
7172             {
7173                 const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7174 
7175                 // Let all blocks know they have parse all their variables
7176                 sc.function->GetBlock (false).SetDidParseVariables (true, true);
7177                 return num_variables;
7178             }
7179         }
7180         else if (sc.comp_unit)
7181         {
7182             DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7183 
7184             if (dwarf_cu == NULL)
7185                 return 0;
7186 
7187             uint32_t vars_added = 0;
7188             VariableListSP variables (sc.comp_unit->GetVariableList(false));
7189 
7190             if (variables.get() == NULL)
7191             {
7192                 variables.reset(new VariableList());
7193                 sc.comp_unit->SetVariableList(variables);
7194 
7195                 DWARFCompileUnit* match_dwarf_cu = NULL;
7196                 const DWARFDebugInfoEntry* die = NULL;
7197                 DIEArray die_offsets;
7198                 if (m_using_apple_tables)
7199                 {
7200                     if (m_apple_names_ap.get())
7201                     {
7202                         DWARFMappedHash::DIEInfoArray hash_data_array;
7203                         if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7204                                                                     dwarf_cu->GetNextCompileUnitOffset(),
7205                                                                     hash_data_array))
7206                         {
7207                             DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7208                         }
7209                     }
7210                 }
7211                 else
7212                 {
7213                     // Index if we already haven't to make sure the compile units
7214                     // get indexed and make their global DIE index list
7215                     if (!m_indexed)
7216                         Index ();
7217 
7218                     m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7219                                                                  dwarf_cu->GetNextCompileUnitOffset(),
7220                                                                  die_offsets);
7221                 }
7222 
7223                 const size_t num_matches = die_offsets.size();
7224                 if (num_matches)
7225                 {
7226                     DWARFDebugInfo* debug_info = DebugInfo();
7227                     for (size_t i=0; i<num_matches; ++i)
7228                     {
7229                         const dw_offset_t die_offset = die_offsets[i];
7230                         die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7231                         if (die)
7232                         {
7233                             VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7234                             if (var_sp)
7235                             {
7236                                 variables->AddVariableIfUnique (var_sp);
7237                                 ++vars_added;
7238                             }
7239                         }
7240                         else
7241                         {
7242                             if (m_using_apple_tables)
7243                             {
7244                                 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7245                             }
7246                         }
7247 
7248                     }
7249                 }
7250             }
7251             return vars_added;
7252         }
7253     }
7254     return 0;
7255 }
7256 
7257 
7258 VariableSP
7259 SymbolFileDWARF::ParseVariableDIE
7260 (
7261     const SymbolContext& sc,
7262     DWARFCompileUnit* dwarf_cu,
7263     const DWARFDebugInfoEntry *die,
7264     const lldb::addr_t func_low_pc
7265 )
7266 {
7267 
7268     VariableSP var_sp (m_die_to_variable_sp[die]);
7269     if (var_sp)
7270         return var_sp;  // Already been parsed!
7271 
7272     const dw_tag_t tag = die->Tag();
7273     ModuleSP module = GetObjectFile()->GetModule();
7274 
7275     if ((tag == DW_TAG_variable) ||
7276         (tag == DW_TAG_constant) ||
7277         (tag == DW_TAG_formal_parameter && sc.function))
7278     {
7279         DWARFDebugInfoEntry::Attributes attributes;
7280         const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7281         if (num_attributes > 0)
7282         {
7283             const char *name = NULL;
7284             const char *mangled = NULL;
7285             Declaration decl;
7286             uint32_t i;
7287             lldb::user_id_t type_uid = LLDB_INVALID_UID;
7288             DWARFExpression location;
7289             bool is_external = false;
7290             bool is_artificial = false;
7291             bool location_is_const_value_data = false;
7292             bool has_explicit_location = false;
7293             //AccessType accessibility = eAccessNone;
7294 
7295             for (i=0; i<num_attributes; ++i)
7296             {
7297                 dw_attr_t attr = attributes.AttributeAtIndex(i);
7298                 DWARFFormValue form_value;
7299                 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7300                 {
7301                     switch (attr)
7302                     {
7303                     case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7304                     case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7305                     case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7306                     case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7307                     case DW_AT_linkage_name:
7308                     case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7309                     case DW_AT_type:        type_uid = form_value.Reference(dwarf_cu); break;
7310                     case DW_AT_external:    is_external = form_value.Boolean(); break;
7311                     case DW_AT_const_value:
7312                         // If we have already found a DW_AT_location attribute, ignore this attribute.
7313                         if (!has_explicit_location)
7314                         {
7315                             location_is_const_value_data = true;
7316                             // The constant value will be either a block, a data value or a string.
7317                             const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7318                             if (DWARFFormValue::IsBlockForm(form_value.Form()))
7319                             {
7320                                 // Retrieve the value as a block expression.
7321                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7322                                 uint32_t block_length = form_value.Unsigned();
7323                                 location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
7324                             }
7325                             else if (DWARFFormValue::IsDataForm(form_value.Form()))
7326                             {
7327                                 // Retrieve the value as a data expression.
7328                                 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7329                                 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7330                                 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7331                                 location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7332                             }
7333                             else
7334                             {
7335                                 // Retrieve the value as a string expression.
7336                                 if (form_value.Form() == DW_FORM_strp)
7337                                 {
7338                                     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7339                                     uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7340                                     uint32_t data_length = fixed_form_sizes[form_value.Form()];
7341                                     location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7342                                 }
7343                                 else
7344                                 {
7345                                     const char *str = form_value.AsCString(&debug_info_data);
7346                                     uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7347                                     uint32_t string_length = strlen(str) + 1;
7348                                     location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
7349                                 }
7350                             }
7351                         }
7352                         break;
7353                     case DW_AT_location:
7354                         {
7355                             location_is_const_value_data = false;
7356                             has_explicit_location = true;
7357                             if (form_value.BlockData())
7358                             {
7359                                 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7360 
7361                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7362                                 uint32_t block_length = form_value.Unsigned();
7363                                 location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
7364                             }
7365                             else
7366                             {
7367                                 const DWARFDataExtractor&    debug_loc_data = get_debug_loc_data();
7368                                 const dw_offset_t debug_loc_offset = form_value.Unsigned();
7369 
7370                                 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7371                                 if (loc_list_length > 0)
7372                                 {
7373                                     location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
7374                                     assert (func_low_pc != LLDB_INVALID_ADDRESS);
7375                                     location.SetLocationListSlide (func_low_pc - dwarf_cu->GetBaseAddress());
7376                                 }
7377                             }
7378                         }
7379                         break;
7380 
7381                     case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7382                     case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7383                     case DW_AT_declaration:
7384                     case DW_AT_description:
7385                     case DW_AT_endianity:
7386                     case DW_AT_segment:
7387                     case DW_AT_start_scope:
7388                     case DW_AT_visibility:
7389                     default:
7390                     case DW_AT_abstract_origin:
7391                     case DW_AT_sibling:
7392                     case DW_AT_specification:
7393                         break;
7394                     }
7395                 }
7396             }
7397 
7398             ValueType scope = eValueTypeInvalid;
7399 
7400             const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7401             dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7402             SymbolContextScope * symbol_context_scope = NULL;
7403 
7404             // DWARF doesn't specify if a DW_TAG_variable is a local, global
7405             // or static variable, so we have to do a little digging by
7406             // looking at the location of a varaible to see if it contains
7407             // a DW_OP_addr opcode _somewhere_ in the definition. I say
7408             // somewhere because clang likes to combine small global variables
7409             // into the same symbol and have locations like:
7410             // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7411             // So if we don't have a DW_TAG_formal_parameter, we can look at
7412             // the location to see if it contains a DW_OP_addr opcode, and
7413             // then we can correctly classify  our variables.
7414             if (tag == DW_TAG_formal_parameter)
7415                 scope = eValueTypeVariableArgument;
7416             else
7417             {
7418                 bool op_error = false;
7419                 // Check if the location has a DW_OP_addr with any address value...
7420                 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7421                 if (!location_is_const_value_data)
7422                 {
7423                     location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7424                     if (op_error)
7425                     {
7426                         StreamString strm;
7427                         location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7428                         GetObjectFile()->GetModule()->ReportError ("0x%8.8x: %s has an invalid location: %s", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), strm.GetString().c_str());
7429                     }
7430                 }
7431 
7432                 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7433                 {
7434                     if (is_external)
7435                         scope = eValueTypeVariableGlobal;
7436                     else
7437                         scope = eValueTypeVariableStatic;
7438 
7439 
7440                     SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7441 
7442                     if (debug_map_symfile)
7443                     {
7444                         // When leaving the DWARF in the .o files on darwin,
7445                         // when we have a global variable that wasn't initialized,
7446                         // the .o file might not have allocated a virtual
7447                         // address for the global variable. In this case it will
7448                         // have created a symbol for the global variable
7449                         // that is undefined/data and external and the value will
7450                         // be the byte size of the variable. When we do the
7451                         // address map in SymbolFileDWARFDebugMap we rely on
7452                         // having an address, we need to do some magic here
7453                         // so we can get the correct address for our global
7454                         // variable. The address for all of these entries
7455                         // will be zero, and there will be an undefined symbol
7456                         // in this object file, and the executable will have
7457                         // a matching symbol with a good address. So here we
7458                         // dig up the correct address and replace it in the
7459                         // location for the variable, and set the variable's
7460                         // symbol context scope to be that of the main executable
7461                         // so the file address will resolve correctly.
7462                         bool linked_oso_file_addr = false;
7463                         if (is_external && location_DW_OP_addr == 0)
7464                         {
7465                             // we have a possible uninitialized extern global
7466                             ConstString const_name(mangled ? mangled : name);
7467                             ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7468                             if (debug_map_objfile)
7469                             {
7470                                 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7471                                 if (debug_map_symtab)
7472                                 {
7473                                     Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7474                                                                                                            eSymbolTypeData,
7475                                                                                                            Symtab::eDebugYes,
7476                                                                                                            Symtab::eVisibilityExtern);
7477                                     if (exe_symbol)
7478                                     {
7479                                         if (exe_symbol->ValueIsAddress())
7480                                         {
7481                                             const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
7482                                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7483                                             {
7484                                                 if (location.Update_DW_OP_addr (exe_file_addr))
7485                                                 {
7486                                                     linked_oso_file_addr = true;
7487                                                     symbol_context_scope = exe_symbol;
7488                                                 }
7489                                             }
7490                                         }
7491                                     }
7492                                 }
7493                             }
7494                         }
7495 
7496                         if (!linked_oso_file_addr)
7497                         {
7498                             // The DW_OP_addr is not zero, but it contains a .o file address which
7499                             // needs to be linked up correctly.
7500                             const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7501                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7502                             {
7503                                 // Update the file address for this variable
7504                                 location.Update_DW_OP_addr (exe_file_addr);
7505                             }
7506                             else
7507                             {
7508                                 // Variable didn't make it into the final executable
7509                                 return var_sp;
7510                             }
7511                         }
7512                     }
7513                 }
7514                 else
7515                 {
7516                     scope = eValueTypeVariableLocal;
7517                 }
7518             }
7519 
7520             if (symbol_context_scope == NULL)
7521             {
7522                 switch (parent_tag)
7523                 {
7524                 case DW_TAG_subprogram:
7525                 case DW_TAG_inlined_subroutine:
7526                 case DW_TAG_lexical_block:
7527                     if (sc.function)
7528                     {
7529                         symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7530                         if (symbol_context_scope == NULL)
7531                             symbol_context_scope = sc.function;
7532                     }
7533                     break;
7534 
7535                 default:
7536                     symbol_context_scope = sc.comp_unit;
7537                     break;
7538                 }
7539             }
7540 
7541             if (symbol_context_scope)
7542             {
7543                 var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7544                                             name,
7545                                             mangled,
7546                                             SymbolFileTypeSP (new SymbolFileType(*this, type_uid)),
7547                                             scope,
7548                                             symbol_context_scope,
7549                                             &decl,
7550                                             location,
7551                                             is_external,
7552                                             is_artificial));
7553 
7554                 var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7555             }
7556             else
7557             {
7558                 // Not ready to parse this variable yet. It might be a global
7559                 // or static variable that is in a function scope and the function
7560                 // in the symbol context wasn't filled in yet
7561                 return var_sp;
7562             }
7563         }
7564         // Cache var_sp even if NULL (the variable was just a specification or
7565         // was missing vital information to be able to be displayed in the debugger
7566         // (missing location due to optimization, etc)) so we don't re-parse
7567         // this DIE over and over later...
7568         m_die_to_variable_sp[die] = var_sp;
7569     }
7570     return var_sp;
7571 }
7572 
7573 
7574 const DWARFDebugInfoEntry *
7575 SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7576                                                    dw_offset_t spec_block_die_offset,
7577                                                    DWARFCompileUnit **result_die_cu_handle)
7578 {
7579     // Give the concrete function die specified by "func_die_offset", find the
7580     // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7581     // to "spec_block_die_offset"
7582     DWARFDebugInfo* info = DebugInfo();
7583 
7584     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7585     if (die)
7586     {
7587         assert (*result_die_cu_handle);
7588         return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7589     }
7590     return NULL;
7591 }
7592 
7593 
7594 const DWARFDebugInfoEntry *
7595 SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7596                                                   const DWARFDebugInfoEntry *die,
7597                                                   dw_offset_t spec_block_die_offset,
7598                                                   DWARFCompileUnit **result_die_cu_handle)
7599 {
7600     if (die)
7601     {
7602         switch (die->Tag())
7603         {
7604         case DW_TAG_subprogram:
7605         case DW_TAG_inlined_subroutine:
7606         case DW_TAG_lexical_block:
7607             {
7608                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7609                 {
7610                     *result_die_cu_handle = dwarf_cu;
7611                     return die;
7612                 }
7613 
7614                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7615                 {
7616                     *result_die_cu_handle = dwarf_cu;
7617                     return die;
7618                 }
7619             }
7620             break;
7621         }
7622 
7623         // Give the concrete function die specified by "func_die_offset", find the
7624         // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7625         // to "spec_block_die_offset"
7626         for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7627         {
7628             const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7629                                                                                       child_die,
7630                                                                                       spec_block_die_offset,
7631                                                                                       result_die_cu_handle);
7632             if (result_die)
7633                 return result_die;
7634         }
7635     }
7636 
7637     *result_die_cu_handle = NULL;
7638     return NULL;
7639 }
7640 
7641 size_t
7642 SymbolFileDWARF::ParseVariables
7643 (
7644     const SymbolContext& sc,
7645     DWARFCompileUnit* dwarf_cu,
7646     const lldb::addr_t func_low_pc,
7647     const DWARFDebugInfoEntry *orig_die,
7648     bool parse_siblings,
7649     bool parse_children,
7650     VariableList* cc_variable_list
7651 )
7652 {
7653     if (orig_die == NULL)
7654         return 0;
7655 
7656     VariableListSP variable_list_sp;
7657 
7658     size_t vars_added = 0;
7659     const DWARFDebugInfoEntry *die = orig_die;
7660     while (die != NULL)
7661     {
7662         dw_tag_t tag = die->Tag();
7663 
7664         // Check to see if we have already parsed this variable or constant?
7665         if (m_die_to_variable_sp[die])
7666         {
7667             if (cc_variable_list)
7668                 cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7669         }
7670         else
7671         {
7672             // We haven't already parsed it, lets do that now.
7673             if ((tag == DW_TAG_variable) ||
7674                 (tag == DW_TAG_constant) ||
7675                 (tag == DW_TAG_formal_parameter && sc.function))
7676             {
7677                 if (variable_list_sp.get() == NULL)
7678                 {
7679                     const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7680                     dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7681                     switch (parent_tag)
7682                     {
7683                         case DW_TAG_compile_unit:
7684                             if (sc.comp_unit != NULL)
7685                             {
7686                                 variable_list_sp = sc.comp_unit->GetVariableList(false);
7687                                 if (variable_list_sp.get() == NULL)
7688                                 {
7689                                     variable_list_sp.reset(new VariableList());
7690                                     sc.comp_unit->SetVariableList(variable_list_sp);
7691                                 }
7692                             }
7693                             else
7694                             {
7695                                 GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7696                                                                            MakeUserID(sc_parent_die->GetOffset()),
7697                                                                            DW_TAG_value_to_name (parent_tag),
7698                                                                            MakeUserID(orig_die->GetOffset()),
7699                                                                            DW_TAG_value_to_name (orig_die->Tag()));
7700                             }
7701                             break;
7702 
7703                         case DW_TAG_subprogram:
7704                         case DW_TAG_inlined_subroutine:
7705                         case DW_TAG_lexical_block:
7706                             if (sc.function != NULL)
7707                             {
7708                                 // Check to see if we already have parsed the variables for the given scope
7709 
7710                                 Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7711                                 if (block == NULL)
7712                                 {
7713                                     // This must be a specification or abstract origin with
7714                                     // a concrete block couterpart in the current function. We need
7715                                     // to find the concrete block so we can correctly add the
7716                                     // variable to it
7717                                     DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7718                                     const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7719                                                                                                                       sc_parent_die->GetOffset(),
7720                                                                                                                       &concrete_block_die_cu);
7721                                     if (concrete_block_die)
7722                                         block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7723                                 }
7724 
7725                                 if (block != NULL)
7726                                 {
7727                                     const bool can_create = false;
7728                                     variable_list_sp = block->GetBlockVariableList (can_create);
7729                                     if (variable_list_sp.get() == NULL)
7730                                     {
7731                                         variable_list_sp.reset(new VariableList());
7732                                         block->SetVariableList(variable_list_sp);
7733                                     }
7734                                 }
7735                             }
7736                             break;
7737 
7738                         default:
7739                              GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7740                                                                         MakeUserID(orig_die->GetOffset()),
7741                                                                         DW_TAG_value_to_name (orig_die->Tag()));
7742                             break;
7743                     }
7744                 }
7745 
7746                 if (variable_list_sp)
7747                 {
7748                     VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7749                     if (var_sp)
7750                     {
7751                         variable_list_sp->AddVariableIfUnique (var_sp);
7752                         if (cc_variable_list)
7753                             cc_variable_list->AddVariableIfUnique (var_sp);
7754                         ++vars_added;
7755                     }
7756                 }
7757             }
7758         }
7759 
7760         bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7761 
7762         if (!skip_children && parse_children && die->HasChildren())
7763         {
7764             vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7765         }
7766 
7767         if (parse_siblings)
7768             die = die->GetSibling();
7769         else
7770             die = NULL;
7771     }
7772     return vars_added;
7773 }
7774 
7775 //------------------------------------------------------------------
7776 // PluginInterface protocol
7777 //------------------------------------------------------------------
7778 ConstString
7779 SymbolFileDWARF::GetPluginName()
7780 {
7781     return GetPluginNameStatic();
7782 }
7783 
7784 uint32_t
7785 SymbolFileDWARF::GetPluginVersion()
7786 {
7787     return 1;
7788 }
7789 
7790 void
7791 SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7792 {
7793     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7794     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7795     if (clang_type)
7796         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7797 }
7798 
7799 void
7800 SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7801 {
7802     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7803     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7804     if (clang_type)
7805         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7806 }
7807 
7808 void
7809 SymbolFileDWARF::DumpIndexes ()
7810 {
7811     StreamFile s(stdout, false);
7812 
7813     s.Printf ("DWARF index for (%s) '%s':",
7814               GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7815               GetObjectFile()->GetFileSpec().GetPath().c_str());
7816     s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7817     s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7818     s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7819     s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7820     s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7821     s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7822     s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7823     s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7824 }
7825 
7826 void
7827 SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7828                                     const char *name,
7829                                     llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7830 {
7831     DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7832 
7833     if (iter == m_decl_ctx_to_die.end())
7834         return;
7835 
7836     for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7837     {
7838         const DWARFDebugInfoEntry *context_die = *pos;
7839 
7840         if (!results)
7841             return;
7842 
7843         DWARFDebugInfo* info = DebugInfo();
7844 
7845         DIEArray die_offsets;
7846 
7847         DWARFCompileUnit* dwarf_cu = NULL;
7848         const DWARFDebugInfoEntry* die = NULL;
7849 
7850         if (m_using_apple_tables)
7851         {
7852             if (m_apple_types_ap.get())
7853                 m_apple_types_ap->FindByName (name, die_offsets);
7854         }
7855         else
7856         {
7857             if (!m_indexed)
7858                 Index ();
7859 
7860             m_type_index.Find (ConstString(name), die_offsets);
7861         }
7862 
7863         const size_t num_matches = die_offsets.size();
7864 
7865         if (num_matches)
7866         {
7867             for (size_t i = 0; i < num_matches; ++i)
7868             {
7869                 const dw_offset_t die_offset = die_offsets[i];
7870                 die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
7871 
7872                 if (die->GetParent() != context_die)
7873                     continue;
7874 
7875                 Type *matching_type = ResolveType (dwarf_cu, die);
7876 
7877                 clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
7878 
7879                 if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
7880                 {
7881                     clang::TagDecl *tag_decl = tag_type->getDecl();
7882                     results->push_back(tag_decl);
7883                 }
7884                 else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
7885                 {
7886                     clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
7887                     results->push_back(typedef_decl);
7888                 }
7889             }
7890         }
7891     }
7892 }
7893 
7894 void
7895 SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
7896                                                  const clang::DeclContext *decl_context,
7897                                                  clang::DeclarationName decl_name,
7898                                                  llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7899 {
7900 
7901     switch (decl_context->getDeclKind())
7902     {
7903     case clang::Decl::Namespace:
7904     case clang::Decl::TranslationUnit:
7905         {
7906             SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7907             symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
7908         }
7909         break;
7910     default:
7911         break;
7912     }
7913 }
7914 
7915 bool
7916 SymbolFileDWARF::LayoutRecordType (void *baton,
7917                                    const clang::RecordDecl *record_decl,
7918                                    uint64_t &size,
7919                                    uint64_t &alignment,
7920                                    llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7921                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7922                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7923 {
7924     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7925     return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
7926 }
7927 
7928 
7929 bool
7930 SymbolFileDWARF::LayoutRecordType (const clang::RecordDecl *record_decl,
7931                                    uint64_t &bit_size,
7932                                    uint64_t &alignment,
7933                                    llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7934                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7935                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7936 {
7937     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
7938     RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
7939     bool success = false;
7940     base_offsets.clear();
7941     vbase_offsets.clear();
7942     if (pos != m_record_decl_to_layout_map.end())
7943     {
7944         bit_size = pos->second.bit_size;
7945         alignment = pos->second.alignment;
7946         field_offsets.swap(pos->second.field_offsets);
7947         base_offsets.swap (pos->second.base_offsets);
7948         vbase_offsets.swap (pos->second.vbase_offsets);
7949         m_record_decl_to_layout_map.erase(pos);
7950         success = true;
7951     }
7952     else
7953     {
7954         bit_size = 0;
7955         alignment = 0;
7956         field_offsets.clear();
7957     }
7958 
7959     if (log)
7960         GetObjectFile()->GetModule()->LogMessage (log,
7961                                                   "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
7962                                                   record_decl,
7963                                                   bit_size,
7964                                                   alignment,
7965                                                   (uint32_t)field_offsets.size(),
7966                                                   (uint32_t)base_offsets.size(),
7967                                                   (uint32_t)vbase_offsets.size(),
7968                                                   success);
7969     return success;
7970 }
7971 
7972 
7973 SymbolFileDWARFDebugMap *
7974 SymbolFileDWARF::GetDebugMapSymfile ()
7975 {
7976     if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
7977     {
7978         lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
7979         if (module_sp)
7980         {
7981             SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
7982             if (sym_vendor)
7983                 m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
7984         }
7985     }
7986     return m_debug_map_symfile;
7987 }
7988 
7989 
7990