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