1 //===-- SymbolFileDWARF.cpp ------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "SymbolFileDWARF.h"
11 
12 // Other libraries and framework includes
13 #include "clang/AST/ASTConsumer.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/DeclGroup.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/Basic/Builtins.h"
20 #include "clang/Basic/IdentifierTable.h"
21 #include "clang/Basic/LangOptions.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "clang/Basic/TargetInfo.h"
24 #include "clang/Basic/Specifiers.h"
25 #include "clang/Sema/DeclSpec.h"
26 
27 #include "llvm/Support/Casting.h"
28 
29 #include "lldb/Core/Module.h"
30 #include "lldb/Core/PluginManager.h"
31 #include "lldb/Core/RegularExpression.h"
32 #include "lldb/Core/Scalar.h"
33 #include "lldb/Core/Section.h"
34 #include "lldb/Core/StreamFile.h"
35 #include "lldb/Core/StreamString.h"
36 #include "lldb/Core/Timer.h"
37 #include "lldb/Core/Value.h"
38 
39 #include "lldb/Host/Host.h"
40 
41 #include "lldb/Symbol/Block.h"
42 #include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
43 #include "lldb/Symbol/CompileUnit.h"
44 #include "lldb/Symbol/LineTable.h"
45 #include "lldb/Symbol/ObjectFile.h"
46 #include "lldb/Symbol/SymbolVendor.h"
47 #include "lldb/Symbol/VariableList.h"
48 
49 #include "lldb/Target/ObjCLanguageRuntime.h"
50 #include "lldb/Target/CPPLanguageRuntime.h"
51 
52 #include "DWARFCompileUnit.h"
53 #include "DWARFDebugAbbrev.h"
54 #include "DWARFDebugAranges.h"
55 #include "DWARFDebugInfo.h"
56 #include "DWARFDebugInfoEntry.h"
57 #include "DWARFDebugLine.h"
58 #include "DWARFDebugPubnames.h"
59 #include "DWARFDebugRanges.h"
60 #include "DWARFDeclContext.h"
61 #include "DWARFDIECollection.h"
62 #include "DWARFFormValue.h"
63 #include "DWARFLocationList.h"
64 #include "LogChannelDWARF.h"
65 #include "SymbolFileDWARFDebugMap.h"
66 
67 #include <map>
68 
69 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
70 
71 #ifdef ENABLE_DEBUG_PRINTF
72 #include <stdio.h>
73 #define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
74 #else
75 #define DEBUG_PRINTF(fmt, ...)
76 #endif
77 
78 #define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
79 
80 using namespace lldb;
81 using namespace lldb_private;
82 
83 //static inline bool
84 //child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
85 //{
86 //    switch (tag)
87 //    {
88 //    default:
89 //        break;
90 //    case DW_TAG_subprogram:
91 //    case DW_TAG_inlined_subroutine:
92 //    case DW_TAG_class_type:
93 //    case DW_TAG_structure_type:
94 //    case DW_TAG_union_type:
95 //        return true;
96 //    }
97 //    return false;
98 //}
99 //
100 static AccessType
101 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
102 {
103     switch (dwarf_accessibility)
104     {
105         case DW_ACCESS_public:      return eAccessPublic;
106         case DW_ACCESS_private:     return eAccessPrivate;
107         case DW_ACCESS_protected:   return eAccessProtected;
108         default:                    break;
109     }
110     return eAccessNone;
111 }
112 
113 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
114 
115 class DIEStack
116 {
117 public:
118 
119     void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
120     {
121         m_dies.push_back (DIEInfo(cu, die));
122     }
123 
124 
125     void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
126     {
127         StreamString log_strm;
128         const size_t n = m_dies.size();
129         log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
130         for (size_t i=0; i<n; i++)
131         {
132             DWARFCompileUnit *cu = m_dies[i].cu;
133             const DWARFDebugInfoEntry *die = m_dies[i].die;
134             std::string qualified_name;
135             die->GetQualifiedName(dwarf, cu, qualified_name);
136             log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
137                              (uint64_t)i,
138                              die->GetOffset(),
139                              DW_TAG_value_to_name(die->Tag()),
140                              qualified_name.c_str());
141         }
142         log->PutCString(log_strm.GetData());
143     }
144     void Pop ()
145     {
146         m_dies.pop_back();
147     }
148 
149     class ScopedPopper
150     {
151     public:
152         ScopedPopper (DIEStack &die_stack) :
153             m_die_stack (die_stack),
154             m_valid (false)
155         {
156         }
157 
158         void
159         Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
160         {
161             m_valid = true;
162             m_die_stack.Push (cu, die);
163         }
164 
165         ~ScopedPopper ()
166         {
167             if (m_valid)
168                 m_die_stack.Pop();
169         }
170 
171 
172 
173     protected:
174         DIEStack &m_die_stack;
175         bool m_valid;
176     };
177 
178 protected:
179     struct DIEInfo {
180         DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
181             cu(c),
182             die(d)
183         {
184         }
185         DWARFCompileUnit *cu;
186         const DWARFDebugInfoEntry *die;
187     };
188     typedef std::vector<DIEInfo> Stack;
189     Stack m_dies;
190 };
191 #endif
192 
193 void
194 SymbolFileDWARF::Initialize()
195 {
196     LogChannelDWARF::Initialize();
197     PluginManager::RegisterPlugin (GetPluginNameStatic(),
198                                    GetPluginDescriptionStatic(),
199                                    CreateInstance);
200 }
201 
202 void
203 SymbolFileDWARF::Terminate()
204 {
205     PluginManager::UnregisterPlugin (CreateInstance);
206     LogChannelDWARF::Initialize();
207 }
208 
209 
210 lldb_private::ConstString
211 SymbolFileDWARF::GetPluginNameStatic()
212 {
213     static ConstString g_name("dwarf");
214     return g_name;
215 }
216 
217 const char *
218 SymbolFileDWARF::GetPluginDescriptionStatic()
219 {
220     return "DWARF and DWARF3 debug symbol file reader.";
221 }
222 
223 
224 SymbolFile*
225 SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
226 {
227     return new SymbolFileDWARF(obj_file);
228 }
229 
230 TypeList *
231 SymbolFileDWARF::GetTypeList ()
232 {
233     if (GetDebugMapSymfile ())
234         return m_debug_map_symfile->GetTypeList();
235     return m_obj_file->GetModule()->GetTypeList();
236 
237 }
238 void
239 SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
240                            const DWARFDebugInfoEntry *die,
241                            dw_offset_t min_die_offset,
242                            dw_offset_t max_die_offset,
243                            uint32_t type_mask,
244                            TypeSet &type_set)
245 {
246     if (cu)
247     {
248         if (die)
249         {
250             const dw_offset_t die_offset = die->GetOffset();
251 
252             if (die_offset >= max_die_offset)
253                 return;
254 
255             if (die_offset >= min_die_offset)
256             {
257                 const dw_tag_t tag = die->Tag();
258 
259                 bool add_type = false;
260 
261                 switch (tag)
262                 {
263                     case DW_TAG_array_type:         add_type = (type_mask & eTypeClassArray         ) != 0; break;
264                     case DW_TAG_unspecified_type:
265                     case DW_TAG_base_type:          add_type = (type_mask & eTypeClassBuiltin       ) != 0; break;
266                     case DW_TAG_class_type:         add_type = (type_mask & eTypeClassClass         ) != 0; break;
267                     case DW_TAG_structure_type:     add_type = (type_mask & eTypeClassStruct        ) != 0; break;
268                     case DW_TAG_union_type:         add_type = (type_mask & eTypeClassUnion         ) != 0; break;
269                     case DW_TAG_enumeration_type:   add_type = (type_mask & eTypeClassEnumeration   ) != 0; break;
270                     case DW_TAG_subroutine_type:
271                     case DW_TAG_subprogram:
272                     case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction      ) != 0; break;
273                     case DW_TAG_pointer_type:       add_type = (type_mask & eTypeClassPointer       ) != 0; break;
274                     case DW_TAG_rvalue_reference_type:
275                     case DW_TAG_reference_type:     add_type = (type_mask & eTypeClassReference     ) != 0; break;
276                     case DW_TAG_typedef:            add_type = (type_mask & eTypeClassTypedef       ) != 0; break;
277                     case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
278                 }
279 
280                 if (add_type)
281                 {
282                     const bool assert_not_being_parsed = true;
283                     Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
284                     if (type)
285                     {
286                         if (type_set.find(type) == type_set.end())
287                             type_set.insert(type);
288                     }
289                 }
290             }
291 
292             for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
293                  child_die != NULL;
294                  child_die = child_die->GetSibling())
295             {
296                 GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
297             }
298         }
299     }
300 }
301 
302 size_t
303 SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
304                            uint32_t type_mask,
305                            TypeList &type_list)
306 
307 {
308     TypeSet type_set;
309 
310     CompileUnit *comp_unit = NULL;
311     DWARFCompileUnit* dwarf_cu = NULL;
312     if (sc_scope)
313         comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
314 
315     if (comp_unit)
316     {
317         dwarf_cu = GetDWARFCompileUnit(comp_unit);
318         if (dwarf_cu == 0)
319             return 0;
320         GetTypes (dwarf_cu,
321                   dwarf_cu->DIE(),
322                   dwarf_cu->GetOffset(),
323                   dwarf_cu->GetNextCompileUnitOffset(),
324                   type_mask,
325                   type_set);
326     }
327     else
328     {
329         DWARFDebugInfo* info = DebugInfo();
330         if (info)
331         {
332             const size_t num_cus = info->GetNumCompileUnits();
333             for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
334             {
335                 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
336                 if (dwarf_cu)
337                 {
338                     GetTypes (dwarf_cu,
339                               dwarf_cu->DIE(),
340                               0,
341                               UINT32_MAX,
342                               type_mask,
343                               type_set);
344                 }
345             }
346         }
347     }
348 //    if (m_using_apple_tables)
349 //    {
350 //        DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
351 //        if (apple_types)
352 //        {
353 //            apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
354 //
355 //                for (auto die_info: die_info_array)
356 //                {
357 //                    bool add_type = TagMatchesTypeMask (type_mask, 0);
358 //                    if (!add_type)
359 //                    {
360 //                        dw_tag_t tag = die_info.tag;
361 //                        if (tag == 0)
362 //                        {
363 //                            const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
364 //                            tag = die->Tag();
365 //                        }
366 //                        add_type = TagMatchesTypeMask (type_mask, tag);
367 //                    }
368 //                    if (add_type)
369 //                    {
370 //                        Type *type = ResolveTypeUID(die_info.offset);
371 //
372 //                        if (type_set.find(type) == type_set.end())
373 //                            type_set.insert(type);
374 //                    }
375 //                }
376 //                return true; // Keep iterating
377 //            });
378 //        }
379 //    }
380 //    else
381 //    {
382 //        if (!m_indexed)
383 //            Index ();
384 //
385 //        m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
386 //
387 //            bool add_type = TagMatchesTypeMask (type_mask, 0);
388 //
389 //            if (!add_type)
390 //            {
391 //                const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
392 //                if (die)
393 //                {
394 //                    const dw_tag_t tag = die->Tag();
395 //                    add_type = TagMatchesTypeMask (type_mask, tag);
396 //                }
397 //            }
398 //
399 //            if (add_type)
400 //            {
401 //                Type *type = ResolveTypeUID(die_offset);
402 //
403 //                if (type_set.find(type) == type_set.end())
404 //                    type_set.insert(type);
405 //            }
406 //            return true; // Keep iterating
407 //        });
408 //    }
409 
410     std::set<ClangASTType> clang_type_set;
411     size_t num_types_added = 0;
412     for (Type *type : type_set)
413     {
414         ClangASTType clang_type = type->GetClangForwardType();
415         if (clang_type_set.find(clang_type) == clang_type_set.end())
416         {
417             clang_type_set.insert(clang_type);
418             type_list.Insert (type->shared_from_this());
419             ++num_types_added;
420         }
421     }
422     return num_types_added;
423 }
424 
425 
426 //----------------------------------------------------------------------
427 // Gets the first parent that is a lexical block, function or inlined
428 // subroutine, or compile unit.
429 //----------------------------------------------------------------------
430 static const DWARFDebugInfoEntry *
431 GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
432 {
433     const DWARFDebugInfoEntry *die;
434     for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
435     {
436         dw_tag_t tag = die->Tag();
437 
438         switch (tag)
439         {
440         case DW_TAG_compile_unit:
441         case DW_TAG_subprogram:
442         case DW_TAG_inlined_subroutine:
443         case DW_TAG_lexical_block:
444             return die;
445         }
446     }
447     return NULL;
448 }
449 
450 
451 SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
452     SymbolFile (objfile),
453     UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
454     m_debug_map_module_wp (),
455     m_debug_map_symfile (NULL),
456     m_clang_tu_decl (NULL),
457     m_flags(),
458     m_data_debug_abbrev (),
459     m_data_debug_aranges (),
460     m_data_debug_frame (),
461     m_data_debug_info (),
462     m_data_debug_line (),
463     m_data_debug_loc (),
464     m_data_debug_ranges (),
465     m_data_debug_str (),
466     m_data_apple_names (),
467     m_data_apple_types (),
468     m_data_apple_namespaces (),
469     m_abbr(),
470     m_info(),
471     m_line(),
472     m_apple_names_ap (),
473     m_apple_types_ap (),
474     m_apple_namespaces_ap (),
475     m_apple_objc_ap (),
476     m_function_basename_index(),
477     m_function_fullname_index(),
478     m_function_method_index(),
479     m_function_selector_index(),
480     m_objc_class_selectors_index(),
481     m_global_index(),
482     m_type_index(),
483     m_namespace_index(),
484     m_indexed (false),
485     m_is_external_ast_source (false),
486     m_using_apple_tables (false),
487     m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
488     m_ranges(),
489     m_unique_ast_type_map ()
490 {
491 }
492 
493 SymbolFileDWARF::~SymbolFileDWARF()
494 {
495     if (m_is_external_ast_source)
496     {
497         ModuleSP module_sp (m_obj_file->GetModule());
498         if (module_sp)
499             module_sp->GetClangASTContext().RemoveExternalSource ();
500     }
501 }
502 
503 static const ConstString &
504 GetDWARFMachOSegmentName ()
505 {
506     static ConstString g_dwarf_section_name ("__DWARF");
507     return g_dwarf_section_name;
508 }
509 
510 UniqueDWARFASTTypeMap &
511 SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
512 {
513     if (GetDebugMapSymfile ())
514         return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
515     return m_unique_ast_type_map;
516 }
517 
518 ClangASTContext &
519 SymbolFileDWARF::GetClangASTContext ()
520 {
521     if (GetDebugMapSymfile ())
522         return m_debug_map_symfile->GetClangASTContext ();
523 
524     ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
525     if (!m_is_external_ast_source)
526     {
527         m_is_external_ast_source = true;
528         llvm::OwningPtr<clang::ExternalASTSource> ast_source_ap (
529             new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
530                                                  SymbolFileDWARF::CompleteObjCInterfaceDecl,
531                                                  SymbolFileDWARF::FindExternalVisibleDeclsByName,
532                                                  SymbolFileDWARF::LayoutRecordType,
533                                                  this));
534         ast.SetExternalSource (ast_source_ap);
535     }
536     return ast;
537 }
538 
539 void
540 SymbolFileDWARF::InitializeObject()
541 {
542     // Install our external AST source callbacks so we can complete Clang types.
543     ModuleSP module_sp (m_obj_file->GetModule());
544     if (module_sp)
545     {
546         const SectionList *section_list = module_sp->GetSectionList();
547 
548         const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
549 
550         // Memory map the DWARF mach-o segment so we have everything mmap'ed
551         // to keep our heap memory usage down.
552         if (section)
553             m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
554     }
555     get_apple_names_data();
556     if (m_data_apple_names.GetByteSize() > 0)
557     {
558         m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
559         if (m_apple_names_ap->IsValid())
560             m_using_apple_tables = true;
561         else
562             m_apple_names_ap.reset();
563     }
564     get_apple_types_data();
565     if (m_data_apple_types.GetByteSize() > 0)
566     {
567         m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
568         if (m_apple_types_ap->IsValid())
569             m_using_apple_tables = true;
570         else
571             m_apple_types_ap.reset();
572     }
573 
574     get_apple_namespaces_data();
575     if (m_data_apple_namespaces.GetByteSize() > 0)
576     {
577         m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
578         if (m_apple_namespaces_ap->IsValid())
579             m_using_apple_tables = true;
580         else
581             m_apple_namespaces_ap.reset();
582     }
583 
584     get_apple_objc_data();
585     if (m_data_apple_objc.GetByteSize() > 0)
586     {
587         m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
588         if (m_apple_objc_ap->IsValid())
589             m_using_apple_tables = true;
590         else
591             m_apple_objc_ap.reset();
592     }
593 }
594 
595 bool
596 SymbolFileDWARF::SupportedVersion(uint16_t version)
597 {
598     return version == 2 || version == 3 || version == 4;
599 }
600 
601 uint32_t
602 SymbolFileDWARF::CalculateAbilities ()
603 {
604     uint32_t abilities = 0;
605     if (m_obj_file != NULL)
606     {
607         const Section* section = NULL;
608         const SectionList *section_list = m_obj_file->GetSectionList();
609         if (section_list == NULL)
610             return 0;
611 
612         uint64_t debug_abbrev_file_size = 0;
613         uint64_t debug_info_file_size = 0;
614         uint64_t debug_line_file_size = 0;
615 
616         section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
617 
618         if (section)
619             section_list = &section->GetChildren ();
620 
621         section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
622         if (section != NULL)
623         {
624             debug_info_file_size = section->GetFileSize();
625 
626             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
627             if (section)
628                 debug_abbrev_file_size = section->GetFileSize();
629             else
630                 m_flags.Set (flagsGotDebugAbbrevData);
631 
632             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
633             if (!section)
634                 m_flags.Set (flagsGotDebugArangesData);
635 
636             section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
637             if (!section)
638                 m_flags.Set (flagsGotDebugFrameData);
639 
640             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
641             if (section)
642                 debug_line_file_size = section->GetFileSize();
643             else
644                 m_flags.Set (flagsGotDebugLineData);
645 
646             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
647             if (!section)
648                 m_flags.Set (flagsGotDebugLocData);
649 
650             section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
651             if (!section)
652                 m_flags.Set (flagsGotDebugMacInfoData);
653 
654             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
655             if (!section)
656                 m_flags.Set (flagsGotDebugPubNamesData);
657 
658             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
659             if (!section)
660                 m_flags.Set (flagsGotDebugPubTypesData);
661 
662             section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
663             if (!section)
664                 m_flags.Set (flagsGotDebugRangesData);
665 
666             section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
667             if (!section)
668                 m_flags.Set (flagsGotDebugStrData);
669         }
670         else
671         {
672             const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
673             if (symfile_dir_cstr)
674             {
675                 if (strcasestr(symfile_dir_cstr, ".dsym"))
676                 {
677                     if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
678                     {
679                         // We have a dSYM file that didn't have a any debug info.
680                         // If the string table has a size of 1, then it was made from
681                         // an executable with no debug info, or from an executable that
682                         // was stripped.
683                         section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
684                         if (section && section->GetFileSize() == 1)
685                         {
686                             m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
687                         }
688                     }
689                 }
690             }
691         }
692 
693         if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
694             abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
695 
696         if (debug_line_file_size > 0)
697             abilities |= LineTables;
698     }
699     return abilities;
700 }
701 
702 const 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->GetSectionList();
710         if (section_list)
711         {
712             SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
713             if (section_sp)
714             {
715                 // See if we memory mapped the DWARF segment?
716                 if (m_dwarf_data.GetByteSize())
717                 {
718                     data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
719                 }
720                 else
721                 {
722                     if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
723                         data.Clear();
724                 }
725             }
726         }
727     }
728     return data;
729 }
730 
731 const 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->GetSectionList());
1060             if (func_range.GetBaseAddress().IsValid())
1061                 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1062         }
1063 
1064         if (func_range.GetBaseAddress().IsValid())
1065         {
1066             Mangled func_name;
1067             if (mangled)
1068                 func_name.SetValue(ConstString(mangled), true);
1069             else if (name)
1070                 func_name.SetValue(ConstString(name), false);
1071 
1072             FunctionSP func_sp;
1073             std::unique_ptr<Declaration> decl_ap;
1074             if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1075                 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1076                                                decl_line,
1077                                                decl_column));
1078 
1079             // Supply the type _only_ if it has already been parsed
1080             Type *func_type = m_die_to_type.lookup (die);
1081 
1082             assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1083 
1084             if (FixupAddress (func_range.GetBaseAddress()))
1085             {
1086                 const user_id_t func_user_id = MakeUserID(die->GetOffset());
1087                 func_sp.reset(new Function (sc.comp_unit,
1088                                             MakeUserID(func_user_id),       // UserID is the DIE offset
1089                                             MakeUserID(func_user_id),
1090                                             func_name,
1091                                             func_type,
1092                                             func_range));           // first address range
1093 
1094                 if (func_sp.get() != NULL)
1095                 {
1096                     if (frame_base.IsValid())
1097                         func_sp->GetFrameBaseExpression() = frame_base;
1098                     sc.comp_unit->AddFunction(func_sp);
1099                     return func_sp.get();
1100                 }
1101             }
1102         }
1103     }
1104     return NULL;
1105 }
1106 
1107 bool
1108 SymbolFileDWARF::FixupAddress (Address &addr)
1109 {
1110     SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1111     if (debug_map_symfile)
1112     {
1113         return debug_map_symfile->LinkOSOAddress(addr);
1114     }
1115     // This is a normal DWARF file, no address fixups need to happen
1116     return true;
1117 }
1118 lldb::LanguageType
1119 SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1120 {
1121     assert (sc.comp_unit);
1122     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1123     if (dwarf_cu)
1124     {
1125         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1126         if (die)
1127         {
1128             const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
1129             if (language)
1130                 return (lldb::LanguageType)language;
1131         }
1132     }
1133     return eLanguageTypeUnknown;
1134 }
1135 
1136 size_t
1137 SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1138 {
1139     assert (sc.comp_unit);
1140     size_t functions_added = 0;
1141     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1142     if (dwarf_cu)
1143     {
1144         DWARFDIECollection function_dies;
1145         const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1146         size_t func_idx;
1147         for (func_idx = 0; func_idx < num_functions; ++func_idx)
1148         {
1149             const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1150             if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1151             {
1152                 if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1153                     ++functions_added;
1154             }
1155         }
1156         //FixupTypes();
1157     }
1158     return functions_added;
1159 }
1160 
1161 bool
1162 SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1163 {
1164     assert (sc.comp_unit);
1165     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1166     if (dwarf_cu)
1167     {
1168         const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1169 
1170         if (cu_die)
1171         {
1172             const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1173             dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1174 
1175             // All file indexes in DWARF are one based and a file of index zero is
1176             // supposed to be the compile unit itself.
1177             support_files.Append (*sc.comp_unit);
1178 
1179             return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1180         }
1181     }
1182     return false;
1183 }
1184 
1185 struct ParseDWARFLineTableCallbackInfo
1186 {
1187     LineTable* line_table;
1188     std::unique_ptr<LineSequence> sequence_ap;
1189 };
1190 
1191 //----------------------------------------------------------------------
1192 // ParseStatementTableCallback
1193 //----------------------------------------------------------------------
1194 static void
1195 ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1196 {
1197     if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1198     {
1199         // Just started parsing the line table
1200     }
1201     else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1202     {
1203         // Done parsing line table, nothing to do for the cleanup
1204     }
1205     else
1206     {
1207         ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1208         LineTable* line_table = info->line_table;
1209 
1210         // If this is our first time here, we need to create a
1211         // sequence container.
1212         if (!info->sequence_ap.get())
1213         {
1214             info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1215             assert(info->sequence_ap.get());
1216         }
1217         line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1218                                                state.address,
1219                                                state.line,
1220                                                state.column,
1221                                                state.file,
1222                                                state.is_stmt,
1223                                                state.basic_block,
1224                                                state.prologue_end,
1225                                                state.epilogue_begin,
1226                                                state.end_sequence);
1227         if (state.end_sequence)
1228         {
1229             // First, put the current sequence into the line table.
1230             line_table->InsertSequence(info->sequence_ap.get());
1231             // Then, empty it to prepare for the next sequence.
1232             info->sequence_ap->Clear();
1233         }
1234     }
1235 }
1236 
1237 bool
1238 SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1239 {
1240     assert (sc.comp_unit);
1241     if (sc.comp_unit->GetLineTable() != NULL)
1242         return true;
1243 
1244     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1245     if (dwarf_cu)
1246     {
1247         const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1248         if (dwarf_cu_die)
1249         {
1250             const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1251             if (cu_line_offset != DW_INVALID_OFFSET)
1252             {
1253                 std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1254                 if (line_table_ap.get())
1255                 {
1256                     ParseDWARFLineTableCallbackInfo info;
1257                     info.line_table = line_table_ap.get();
1258                     lldb::offset_t offset = cu_line_offset;
1259                     DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1260                     if (m_debug_map_symfile)
1261                     {
1262                         // We have an object file that has a line table with addresses
1263                         // that are not linked. We need to link the line table and convert
1264                         // the addresses that are relative to the .o file into addresses
1265                         // for the main executable.
1266                         sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1267                     }
1268                     else
1269                     {
1270                         sc.comp_unit->SetLineTable(line_table_ap.release());
1271                         return true;
1272                     }
1273                 }
1274             }
1275         }
1276     }
1277     return false;
1278 }
1279 
1280 size_t
1281 SymbolFileDWARF::ParseFunctionBlocks
1282 (
1283     const SymbolContext& sc,
1284     Block *parent_block,
1285     DWARFCompileUnit* dwarf_cu,
1286     const DWARFDebugInfoEntry *die,
1287     addr_t subprogram_low_pc,
1288     uint32_t depth
1289 )
1290 {
1291     size_t blocks_added = 0;
1292     while (die != NULL)
1293     {
1294         dw_tag_t tag = die->Tag();
1295 
1296         switch (tag)
1297         {
1298         case DW_TAG_inlined_subroutine:
1299         case DW_TAG_subprogram:
1300         case DW_TAG_lexical_block:
1301             {
1302                 Block *block = NULL;
1303                 if (tag == DW_TAG_subprogram)
1304                 {
1305                     // Skip any DW_TAG_subprogram DIEs that are inside
1306                     // of a normal or inlined functions. These will be
1307                     // parsed on their own as separate entities.
1308 
1309                     if (depth > 0)
1310                         break;
1311 
1312                     block = parent_block;
1313                 }
1314                 else
1315                 {
1316                     BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1317                     parent_block->AddChild(block_sp);
1318                     block = block_sp.get();
1319                 }
1320                 DWARFDebugRanges::RangeList ranges;
1321                 const char *name = NULL;
1322                 const char *mangled_name = NULL;
1323 
1324                 int decl_file = 0;
1325                 int decl_line = 0;
1326                 int decl_column = 0;
1327                 int call_file = 0;
1328                 int call_line = 0;
1329                 int call_column = 0;
1330                 if (die->GetDIENamesAndRanges (this,
1331                                                dwarf_cu,
1332                                                name,
1333                                                mangled_name,
1334                                                ranges,
1335                                                decl_file, decl_line, decl_column,
1336                                                call_file, call_line, call_column))
1337                 {
1338                     if (tag == DW_TAG_subprogram)
1339                     {
1340                         assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1341                         subprogram_low_pc = ranges.GetMinRangeBase(0);
1342                     }
1343                     else if (tag == DW_TAG_inlined_subroutine)
1344                     {
1345                         // We get called here for inlined subroutines in two ways.
1346                         // The first time is when we are making the Function object
1347                         // for this inlined concrete instance.  Since we're creating a top level block at
1348                         // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1349                         // adjust the containing address.
1350                         // The second time is when we are parsing the blocks inside the function that contains
1351                         // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1352                         // function the offset will be for that function.
1353                         if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1354                         {
1355                             subprogram_low_pc = ranges.GetMinRangeBase(0);
1356                         }
1357                     }
1358 
1359                     AddRangesToBlock (*block, ranges, subprogram_low_pc);
1360 
1361                     if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1362                     {
1363                         std::unique_ptr<Declaration> decl_ap;
1364                         if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1365                             decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1366                                                           decl_line, decl_column));
1367 
1368                         std::unique_ptr<Declaration> call_ap;
1369                         if (call_file != 0 || call_line != 0 || call_column != 0)
1370                             call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1371                                                           call_line, call_column));
1372 
1373                         block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1374                     }
1375 
1376                     ++blocks_added;
1377 
1378                     if (die->HasChildren())
1379                     {
1380                         blocks_added += ParseFunctionBlocks (sc,
1381                                                              block,
1382                                                              dwarf_cu,
1383                                                              die->GetFirstChild(),
1384                                                              subprogram_low_pc,
1385                                                              depth + 1);
1386                     }
1387                 }
1388             }
1389             break;
1390         default:
1391             break;
1392         }
1393 
1394         // Only parse siblings of the block if we are not at depth zero. A depth
1395         // of zero indicates we are currently parsing the top level
1396         // DW_TAG_subprogram DIE
1397 
1398         if (depth == 0)
1399             die = NULL;
1400         else
1401             die = die->GetSibling();
1402     }
1403     return blocks_added;
1404 }
1405 
1406 bool
1407 SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1408                                    const DWARFDebugInfoEntry *die,
1409                                    ClangASTContext::TemplateParameterInfos &template_param_infos)
1410 {
1411     const dw_tag_t tag = die->Tag();
1412 
1413     switch (tag)
1414     {
1415     case DW_TAG_template_type_parameter:
1416     case DW_TAG_template_value_parameter:
1417         {
1418             const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1419 
1420             DWARFDebugInfoEntry::Attributes attributes;
1421             const size_t num_attributes = die->GetAttributes (this,
1422                                                               dwarf_cu,
1423                                                               fixed_form_sizes,
1424                                                               attributes);
1425             const char *name = NULL;
1426             Type *lldb_type = NULL;
1427             ClangASTType clang_type;
1428             uint64_t uval64 = 0;
1429             bool uval64_valid = false;
1430             if (num_attributes > 0)
1431             {
1432                 DWARFFormValue form_value;
1433                 for (size_t i=0; i<num_attributes; ++i)
1434                 {
1435                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
1436 
1437                     switch (attr)
1438                     {
1439                         case DW_AT_name:
1440                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1441                                 name = form_value.AsCString(&get_debug_str_data());
1442                             break;
1443 
1444                         case DW_AT_type:
1445                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1446                             {
1447                                 const dw_offset_t type_die_offset = form_value.Reference(dwarf_cu);
1448                                 lldb_type = ResolveTypeUID(type_die_offset);
1449                                 if (lldb_type)
1450                                     clang_type = lldb_type->GetClangForwardType();
1451                             }
1452                             break;
1453 
1454                         case DW_AT_const_value:
1455                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1456                             {
1457                                 uval64_valid = true;
1458                                 uval64 = form_value.Unsigned();
1459                             }
1460                             break;
1461                         default:
1462                             break;
1463                     }
1464                 }
1465 
1466                 clang::ASTContext *ast = GetClangASTContext().getASTContext();
1467                 if (!clang_type)
1468                     clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1469 
1470                 if (clang_type)
1471                 {
1472                     bool is_signed = false;
1473                     if (name && name[0])
1474                         template_param_infos.names.push_back(name);
1475                     else
1476                         template_param_infos.names.push_back(NULL);
1477 
1478                     if (tag == DW_TAG_template_value_parameter &&
1479                         lldb_type != NULL &&
1480                         clang_type.IsIntegerType (is_signed) &&
1481                         uval64_valid)
1482                     {
1483                         llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1484                         template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1485                                                                                       llvm::APSInt(apint),
1486                                                                                       clang_type.GetQualType()));
1487                     }
1488                     else
1489                     {
1490                         template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1491                     }
1492                 }
1493                 else
1494                 {
1495                     return false;
1496                 }
1497 
1498             }
1499         }
1500         return true;
1501 
1502     default:
1503         break;
1504     }
1505     return false;
1506 }
1507 
1508 bool
1509 SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1510                                               const DWARFDebugInfoEntry *parent_die,
1511                                               ClangASTContext::TemplateParameterInfos &template_param_infos)
1512 {
1513 
1514     if (parent_die == NULL)
1515         return false;
1516 
1517     Args template_parameter_names;
1518     for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1519          die != NULL;
1520          die = die->GetSibling())
1521     {
1522         const dw_tag_t tag = die->Tag();
1523 
1524         switch (tag)
1525         {
1526             case DW_TAG_template_type_parameter:
1527             case DW_TAG_template_value_parameter:
1528                 ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1529             break;
1530 
1531         default:
1532             break;
1533         }
1534     }
1535     if (template_param_infos.args.empty())
1536         return false;
1537     return template_param_infos.args.size() == template_param_infos.names.size();
1538 }
1539 
1540 clang::ClassTemplateDecl *
1541 SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1542                                          lldb::AccessType access_type,
1543                                          const char *parent_name,
1544                                          int tag_decl_kind,
1545                                          const ClangASTContext::TemplateParameterInfos &template_param_infos)
1546 {
1547     if (template_param_infos.IsValid())
1548     {
1549         std::string template_basename(parent_name);
1550         template_basename.erase (template_basename.find('<'));
1551         ClangASTContext &ast = GetClangASTContext();
1552 
1553         return ast.CreateClassTemplateDecl (decl_ctx,
1554                                             access_type,
1555                                             template_basename.c_str(),
1556                                             tag_decl_kind,
1557                                             template_param_infos);
1558     }
1559     return NULL;
1560 }
1561 
1562 class SymbolFileDWARF::DelayedAddObjCClassProperty
1563 {
1564 public:
1565     DelayedAddObjCClassProperty
1566     (
1567         const ClangASTType     &class_opaque_type,
1568         const char             *property_name,
1569         const ClangASTType     &property_opaque_type,  // The property type is only required if you don't have an ivar decl
1570         clang::ObjCIvarDecl    *ivar_decl,
1571         const char             *property_setter_name,
1572         const char             *property_getter_name,
1573         uint32_t                property_attributes,
1574         const ClangASTMetadata *metadata
1575     ) :
1576         m_class_opaque_type     (class_opaque_type),
1577         m_property_name         (property_name),
1578         m_property_opaque_type  (property_opaque_type),
1579         m_ivar_decl             (ivar_decl),
1580         m_property_setter_name  (property_setter_name),
1581         m_property_getter_name  (property_getter_name),
1582         m_property_attributes   (property_attributes)
1583     {
1584         if (metadata != NULL)
1585         {
1586             m_metadata_ap.reset(new ClangASTMetadata());
1587             *m_metadata_ap = *metadata;
1588         }
1589     }
1590 
1591     DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1592     {
1593         *this = rhs;
1594     }
1595 
1596     DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1597     {
1598         m_class_opaque_type    = rhs.m_class_opaque_type;
1599         m_property_name        = rhs.m_property_name;
1600         m_property_opaque_type = rhs.m_property_opaque_type;
1601         m_ivar_decl            = rhs.m_ivar_decl;
1602         m_property_setter_name = rhs.m_property_setter_name;
1603         m_property_getter_name = rhs.m_property_getter_name;
1604         m_property_attributes  = rhs.m_property_attributes;
1605 
1606         if (rhs.m_metadata_ap.get())
1607         {
1608             m_metadata_ap.reset (new ClangASTMetadata());
1609             *m_metadata_ap = *rhs.m_metadata_ap;
1610         }
1611         return *this;
1612     }
1613 
1614     bool
1615     Finalize()
1616     {
1617         return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1618                                                          m_property_opaque_type,
1619                                                          m_ivar_decl,
1620                                                          m_property_setter_name,
1621                                                          m_property_getter_name,
1622                                                          m_property_attributes,
1623                                                          m_metadata_ap.get());
1624     }
1625 private:
1626     ClangASTType            m_class_opaque_type;
1627     const char             *m_property_name;
1628     ClangASTType            m_property_opaque_type;
1629     clang::ObjCIvarDecl    *m_ivar_decl;
1630     const char             *m_property_setter_name;
1631     const char             *m_property_getter_name;
1632     uint32_t                m_property_attributes;
1633     std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1634 };
1635 
1636 struct BitfieldInfo
1637 {
1638     uint64_t bit_size;
1639     uint64_t bit_offset;
1640 
1641     BitfieldInfo () :
1642         bit_size (LLDB_INVALID_ADDRESS),
1643         bit_offset (LLDB_INVALID_ADDRESS)
1644     {
1645     }
1646 
1647     bool IsValid ()
1648     {
1649         return (bit_size != LLDB_INVALID_ADDRESS) &&
1650                (bit_offset != LLDB_INVALID_ADDRESS);
1651     }
1652 };
1653 
1654 
1655 bool
1656 SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1657                                          const DWARFDebugInfoEntry *parent_die)
1658 {
1659     if (parent_die)
1660     {
1661         for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1662         {
1663             dw_tag_t tag = die->Tag();
1664             bool check_virtuality = false;
1665             switch (tag)
1666             {
1667                 case DW_TAG_inheritance:
1668                 case DW_TAG_subprogram:
1669                     check_virtuality = true;
1670                     break;
1671                 default:
1672                     break;
1673             }
1674             if (check_virtuality)
1675             {
1676                 if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1677                     return true;
1678             }
1679         }
1680     }
1681     return false;
1682 }
1683 
1684 size_t
1685 SymbolFileDWARF::ParseChildMembers
1686 (
1687     const SymbolContext& sc,
1688     DWARFCompileUnit* dwarf_cu,
1689     const DWARFDebugInfoEntry *parent_die,
1690     ClangASTType &class_clang_type,
1691     const LanguageType class_language,
1692     std::vector<clang::CXXBaseSpecifier *>& base_classes,
1693     std::vector<int>& member_accessibilities,
1694     DWARFDIECollection& member_function_dies,
1695     DelayedPropertyList& delayed_properties,
1696     AccessType& default_accessibility,
1697     bool &is_a_class,
1698     LayoutInfo &layout_info
1699 )
1700 {
1701     if (parent_die == NULL)
1702         return 0;
1703 
1704     size_t count = 0;
1705     const DWARFDebugInfoEntry *die;
1706     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1707     uint32_t member_idx = 0;
1708     BitfieldInfo last_field_info;
1709 
1710     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1711     {
1712         dw_tag_t tag = die->Tag();
1713 
1714         switch (tag)
1715         {
1716         case DW_TAG_member:
1717         case DW_TAG_APPLE_property:
1718             {
1719                 DWARFDebugInfoEntry::Attributes attributes;
1720                 const size_t num_attributes = die->GetAttributes (this,
1721                                                                   dwarf_cu,
1722                                                                   fixed_form_sizes,
1723                                                                   attributes);
1724                 if (num_attributes > 0)
1725                 {
1726                     Declaration decl;
1727                     //DWARFExpression location;
1728                     const char *name = NULL;
1729                     const char *prop_name = NULL;
1730                     const char *prop_getter_name = NULL;
1731                     const char *prop_setter_name = NULL;
1732                     uint32_t prop_attributes = 0;
1733 
1734 
1735                     bool is_artificial = false;
1736                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1737                     AccessType accessibility = eAccessNone;
1738                     uint32_t member_byte_offset = UINT32_MAX;
1739                     size_t byte_size = 0;
1740                     size_t bit_offset = 0;
1741                     size_t bit_size = 0;
1742                     bool is_external = false; // On DW_TAG_members, this means the member is static
1743                     uint32_t i;
1744                     for (i=0; i<num_attributes && !is_artificial; ++i)
1745                     {
1746                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
1747                         DWARFFormValue form_value;
1748                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1749                         {
1750                             switch (attr)
1751                             {
1752                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1753                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1754                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1755                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1756                             case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
1757                             case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1758                             case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1759                             case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1760                             case DW_AT_data_member_location:
1761                                 if (form_value.BlockData())
1762                                 {
1763                                     Value initialValue(0);
1764                                     Value memberOffset(0);
1765                                     const DataExtractor& debug_info_data = get_debug_info_data();
1766                                     uint32_t block_length = form_value.Unsigned();
1767                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1768                                     if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1769                                                                   NULL, // ClangExpressionVariableList *
1770                                                                   NULL, // ClangExpressionDeclMap *
1771                                                                   NULL, // RegisterContext *
1772                                                                   debug_info_data,
1773                                                                   block_offset,
1774                                                                   block_length,
1775                                                                   eRegisterKindDWARF,
1776                                                                   &initialValue,
1777                                                                   memberOffset,
1778                                                                   NULL))
1779                                     {
1780                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1781                                     }
1782                                 }
1783                                 else
1784                                 {
1785                                     // With DWARF 3 and later, if the value is an integer constant,
1786                                     // this form value is the offset in bytes from the beginning
1787                                     // of the containing entity.
1788                                     member_byte_offset = form_value.Unsigned();
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                     // Handle 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                             if (accessibility == eAccessNone)
1895                                 accessibility = eAccessPublic;
1896                             class_clang_type.AddVariableToRecordType (name,
1897                                                                       var_type->GetClangLayoutType(),
1898                                                                       accessibility);
1899                         }
1900                         break;
1901                     }
1902 
1903                     if (is_artificial == false)
1904                     {
1905                         Type *member_type = ResolveTypeUID(encoding_uid);
1906 
1907                         clang::FieldDecl *field_decl = NULL;
1908                         if (tag == DW_TAG_member)
1909                         {
1910                             if (member_type)
1911                             {
1912                                 if (accessibility == eAccessNone)
1913                                     accessibility = default_accessibility;
1914                                 member_accessibilities.push_back(accessibility);
1915 
1916                                 BitfieldInfo this_field_info;
1917 
1918                                 this_field_info.bit_size = bit_size;
1919 
1920                                 if (member_byte_offset != UINT32_MAX || bit_size != 0)
1921                                 {
1922                                     /////////////////////////////////////////////////////////////
1923                                     // How to locate a field given the DWARF debug information
1924                                     //
1925                                     // AT_byte_size indicates the size of the word in which the
1926                                     // bit offset must be interpreted.
1927                                     //
1928                                     // AT_data_member_location indicates the byte offset of the
1929                                     // word from the base address of the structure.
1930                                     //
1931                                     // AT_bit_offset indicates how many bits into the word
1932                                     // (according to the host endianness) the low-order bit of
1933                                     // the field starts.  AT_bit_offset can be negative.
1934                                     //
1935                                     // AT_bit_size indicates the size of the field in bits.
1936                                     /////////////////////////////////////////////////////////////
1937 
1938                                     this_field_info.bit_offset = 0;
1939 
1940                                     this_field_info.bit_offset += (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
1941 
1942                                     if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
1943                                     {
1944                                         this_field_info.bit_offset += byte_size * 8;
1945                                         this_field_info.bit_offset -= (bit_offset + bit_size);
1946                                     }
1947                                     else
1948                                     {
1949                                         this_field_info.bit_offset += bit_offset;
1950                                     }
1951                                 }
1952 
1953                                 // If the member to be emitted did not start on a character boundary and there is
1954                                 // empty space between the last field and this one, then we need to emit an
1955                                 // anonymous member filling up the space up to its start.  There are three cases
1956                                 // here:
1957                                 //
1958                                 // 1 If the previous member ended on a character boundary, then we can emit an
1959                                 //   anonymous member starting at the most recent character boundary.
1960                                 //
1961                                 // 2 If the previous member did not end on a character boundary and the distance
1962                                 //   from the end of the previous member to the current member is less than a
1963                                 //   word width, then we can emit an anonymous member starting right after the
1964                                 //   previous member and right before this member.
1965                                 //
1966                                 // 3 If the previous member did not end on a character boundary and the distance
1967                                 //   from the end of the previous member to the current member is greater than
1968                                 //   or equal a word width, then we act as in Case 1.
1969 
1970                                 const uint64_t character_width = 8;
1971                                 const uint64_t word_width = 32;
1972 
1973                                 if (this_field_info.IsValid())
1974                                 {
1975                                     // Objective-C has invalid DW_AT_bit_offset values in older versions
1976                                     // of clang, so we have to be careful and only insert unnammed bitfields
1977                                     // if we have a new enough clang.
1978                                     bool detect_unnamed_bitfields = true;
1979 
1980                                     if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
1981                                         detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
1982 
1983                                     if (detect_unnamed_bitfields)
1984                                     {
1985                                         BitfieldInfo anon_field_info;
1986 
1987                                         if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
1988                                         {
1989                                             uint64_t last_field_end = 0;
1990 
1991                                             if (last_field_info.IsValid())
1992                                                 last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
1993 
1994                                             if (this_field_info.bit_offset != last_field_end)
1995                                             {
1996                                                 if (((last_field_end % character_width) == 0) ||                    // case 1
1997                                                     (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
1998                                                 {
1999                                                     anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2000                                                     anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2001                                                 }
2002                                                 else                                                                // case 2
2003                                                 {
2004                                                     anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2005                                                     anon_field_info.bit_offset = last_field_end;
2006                                                 }
2007                                             }
2008                                         }
2009 
2010                                         if (anon_field_info.IsValid())
2011                                         {
2012                                             clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (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                                 ClangASTType 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                                     ClangASTType member_array_element_type;
2030                                     uint64_t member_array_size;
2031                                     bool member_array_is_incomplete;
2032 
2033                                     if (member_clang_type.IsArrayType(&member_array_element_type,
2034                                                                       &member_array_size,
2035                                                                       &member_array_is_incomplete) &&
2036                                         !member_array_is_incomplete)
2037                                     {
2038                                         uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2039 
2040                                         if (member_byte_offset >= parent_byte_size)
2041                                         {
2042                                             if (member_array_size != 1)
2043                                             {
2044                                                 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,
2045                                                                                            MakeUserID(die->GetOffset()),
2046                                                                                            name,
2047                                                                                            encoding_uid,
2048                                                                                            MakeUserID(parent_die->GetOffset()));
2049                                             }
2050 
2051                                             member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2052                                         }
2053                                     }
2054                                 }
2055 
2056                                 field_decl = class_clang_type.AddFieldToRecordType (name,
2057                                                                                     member_clang_type,
2058                                                                                     accessibility,
2059                                                                                     bit_size);
2060 
2061                                 GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2062 
2063                                 if (this_field_info.IsValid())
2064                                 {
2065                                     layout_info.field_offsets.insert(std::make_pair(field_decl, this_field_info.bit_offset));
2066                                     last_field_info = this_field_info;
2067                                 }
2068                             }
2069                             else
2070                             {
2071                                 if (name)
2072                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2073                                                                                MakeUserID(die->GetOffset()),
2074                                                                                name,
2075                                                                                encoding_uid);
2076                                 else
2077                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2078                                                                                MakeUserID(die->GetOffset()),
2079                                                                                encoding_uid);
2080                             }
2081                         }
2082 
2083                         if (prop_name != NULL)
2084                         {
2085                             clang::ObjCIvarDecl *ivar_decl = NULL;
2086 
2087                             if (field_decl)
2088                             {
2089                                 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2090                                 assert (ivar_decl != NULL);
2091                             }
2092 
2093                             ClangASTMetadata metadata;
2094                             metadata.SetUserID (MakeUserID(die->GetOffset()));
2095                             delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2096                                                                                      prop_name,
2097                                                                                      member_type->GetClangLayoutType(),
2098                                                                                      ivar_decl,
2099                                                                                      prop_setter_name,
2100                                                                                      prop_getter_name,
2101                                                                                      prop_attributes,
2102                                                                                      &metadata));
2103 
2104                             if (ivar_decl)
2105                                 GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2106                         }
2107                     }
2108                 }
2109                 ++member_idx;
2110             }
2111             break;
2112 
2113         case DW_TAG_subprogram:
2114             // Let the type parsing code handle this one for us.
2115             member_function_dies.Append (die);
2116             break;
2117 
2118         case DW_TAG_inheritance:
2119             {
2120                 is_a_class = true;
2121                 if (default_accessibility == eAccessNone)
2122                     default_accessibility = eAccessPrivate;
2123                 // TODO: implement DW_TAG_inheritance type parsing
2124                 DWARFDebugInfoEntry::Attributes attributes;
2125                 const size_t num_attributes = die->GetAttributes (this,
2126                                                                   dwarf_cu,
2127                                                                   fixed_form_sizes,
2128                                                                   attributes);
2129                 if (num_attributes > 0)
2130                 {
2131                     Declaration decl;
2132                     DWARFExpression location;
2133                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2134                     AccessType accessibility = default_accessibility;
2135                     bool is_virtual = false;
2136                     bool is_base_of_class = true;
2137                     off_t member_byte_offset = 0;
2138                     uint32_t i;
2139                     for (i=0; i<num_attributes; ++i)
2140                     {
2141                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
2142                         DWARFFormValue form_value;
2143                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2144                         {
2145                             switch (attr)
2146                             {
2147                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2148                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
2149                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2150                             case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
2151                             case DW_AT_data_member_location:
2152                                 if (form_value.BlockData())
2153                                 {
2154                                     Value initialValue(0);
2155                                     Value memberOffset(0);
2156                                     const DataExtractor& debug_info_data = get_debug_info_data();
2157                                     uint32_t block_length = form_value.Unsigned();
2158                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2159                                     if (DWARFExpression::Evaluate (NULL,
2160                                                                    NULL,
2161                                                                    NULL,
2162                                                                    NULL,
2163                                                                    debug_info_data,
2164                                                                    block_offset,
2165                                                                    block_length,
2166                                                                    eRegisterKindDWARF,
2167                                                                    &initialValue,
2168                                                                    memberOffset,
2169                                                                    NULL))
2170                                     {
2171                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2172                                     }
2173                                 }
2174                                 else
2175                                 {
2176                                     // With DWARF 3 and later, if the value is an integer constant,
2177                                     // this form value is the offset in bytes from the beginning
2178                                     // of the containing entity.
2179                                     member_byte_offset = form_value.Unsigned();
2180                                 }
2181                                 break;
2182 
2183                             case DW_AT_accessibility:
2184                                 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2185                                 break;
2186 
2187                             case DW_AT_virtuality:
2188                                 is_virtual = form_value.Boolean();
2189                                 break;
2190 
2191                             case DW_AT_sibling:
2192                                 break;
2193 
2194                             default:
2195                                 break;
2196                             }
2197                         }
2198                     }
2199 
2200                     Type *base_class_type = ResolveTypeUID(encoding_uid);
2201                     assert(base_class_type);
2202 
2203                     ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2204                     assert (base_class_clang_type);
2205                     if (class_language == eLanguageTypeObjC)
2206                     {
2207                         class_clang_type.SetObjCSuperClass(base_class_clang_type);
2208                     }
2209                     else
2210                     {
2211                         base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2212                                                                                                is_virtual,
2213                                                                                                is_base_of_class));
2214 
2215                         if (is_virtual)
2216                         {
2217                             // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2218                             // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2219                             // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2220                             //      DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2221                             // Given this, there is really no valid response we can give to clang for virtual base
2222                             // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2223                             // AST source in clang.
2224                         }
2225                         else
2226                         {
2227                             layout_info.base_offsets.insert(std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2228                                                                            clang::CharUnits::fromQuantity(member_byte_offset)));
2229                         }
2230                     }
2231                 }
2232             }
2233             break;
2234 
2235         default:
2236             break;
2237         }
2238     }
2239 
2240     return count;
2241 }
2242 
2243 
2244 clang::DeclContext*
2245 SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2246 {
2247     DWARFDebugInfo* debug_info = DebugInfo();
2248     if (debug_info && UserIDMatches(type_uid))
2249     {
2250         DWARFCompileUnitSP cu_sp;
2251         const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2252         if (die)
2253             return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2254     }
2255     return NULL;
2256 }
2257 
2258 clang::DeclContext*
2259 SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2260 {
2261     if (UserIDMatches(type_uid))
2262         return GetClangDeclContextForDIEOffset (sc, type_uid);
2263     return NULL;
2264 }
2265 
2266 Type*
2267 SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2268 {
2269     if (UserIDMatches(type_uid))
2270     {
2271         DWARFDebugInfo* debug_info = DebugInfo();
2272         if (debug_info)
2273         {
2274             DWARFCompileUnitSP cu_sp;
2275             const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2276             const bool assert_not_being_parsed = true;
2277             return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2278         }
2279     }
2280     return NULL;
2281 }
2282 
2283 Type*
2284 SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2285 {
2286     if (die != NULL)
2287     {
2288         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2289         if (log)
2290             GetObjectFile()->GetModule()->LogMessage (log,
2291                                                       "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2292                                                       die->GetOffset(),
2293                                                       DW_TAG_value_to_name(die->Tag()),
2294                                                       die->GetName(this, cu));
2295 
2296         // We might be coming in in the middle of a type tree (a class
2297         // withing a class, an enum within a class), so parse any needed
2298         // parent DIEs before we get to this one...
2299         const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2300         switch (decl_ctx_die->Tag())
2301         {
2302             case DW_TAG_structure_type:
2303             case DW_TAG_union_type:
2304             case DW_TAG_class_type:
2305             {
2306                 // Get the type, which could be a forward declaration
2307                 if (log)
2308                     GetObjectFile()->GetModule()->LogMessage (log,
2309                                                               "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2310                                                               die->GetOffset(),
2311                                                               DW_TAG_value_to_name(die->Tag()),
2312                                                               die->GetName(this, cu),
2313                                                               decl_ctx_die->GetOffset());
2314 //
2315 //                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2316 //                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2317 //                {
2318 //                    if (log)
2319 //                        GetObjectFile()->GetModule()->LogMessage (log,
2320 //                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2321 //                                                                  die->GetOffset(),
2322 //                                                                  DW_TAG_value_to_name(die->Tag()),
2323 //                                                                  die->GetName(this, cu),
2324 //                                                                  decl_ctx_die->GetOffset());
2325 //                    // Ask the type to complete itself if it already hasn't since if we
2326 //                    // want a function (method or static) from a class, the class must
2327 //                    // create itself and add it's own methods and class functions.
2328 //                    if (parent_type)
2329 //                        parent_type->GetClangFullType();
2330 //                }
2331             }
2332             break;
2333 
2334             default:
2335                 break;
2336         }
2337         return ResolveType (cu, die);
2338     }
2339     return NULL;
2340 }
2341 
2342 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
2343 // SymbolFileDWARF objects to detect if this DWARF file is the one that
2344 // can resolve a clang_type.
2345 bool
2346 SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2347 {
2348     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2349     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2350     return die != NULL;
2351 }
2352 
2353 
2354 bool
2355 SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2356 {
2357     // We have a struct/union/class/enum that needs to be fully resolved.
2358     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2359     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2360     if (die == NULL)
2361     {
2362         // We have already resolved this type...
2363         return true;
2364     }
2365     // Once we start resolving this type, remove it from the forward declaration
2366     // map in case anyone child members or other types require this type to get resolved.
2367     // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2368     // are done.
2369     m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2370 
2371 
2372     // Disable external storage for this type so we don't get anymore
2373     // clang::ExternalASTSource queries for this type.
2374     clang_type.SetHasExternalStorage (false);
2375 
2376     DWARFDebugInfo* debug_info = DebugInfo();
2377 
2378     DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2379     Type *type = m_die_to_type.lookup (die);
2380 
2381     const dw_tag_t tag = die->Tag();
2382 
2383     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2384     if (log)
2385     {
2386         GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2387                                                                   "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2388                                                                   MakeUserID(die->GetOffset()),
2389                                                                   DW_TAG_value_to_name(tag),
2390                                                                   type->GetName().AsCString());
2391 
2392     }
2393     assert (clang_type);
2394     DWARFDebugInfoEntry::Attributes attributes;
2395 
2396     switch (tag)
2397     {
2398     case DW_TAG_structure_type:
2399     case DW_TAG_union_type:
2400     case DW_TAG_class_type:
2401         {
2402             LayoutInfo layout_info;
2403 
2404             {
2405                 if (die->HasChildren())
2406                 {
2407 
2408                     LanguageType class_language = eLanguageTypeUnknown;
2409                     if (clang_type.IsObjCObjectOrInterfaceType())
2410                     {
2411                         class_language = eLanguageTypeObjC;
2412                         // For objective C we don't start the definition when
2413                         // the class is created.
2414                         clang_type.StartTagDeclarationDefinition ();
2415                     }
2416 
2417                     int tag_decl_kind = -1;
2418                     AccessType default_accessibility = eAccessNone;
2419                     if (tag == DW_TAG_structure_type)
2420                     {
2421                         tag_decl_kind = clang::TTK_Struct;
2422                         default_accessibility = eAccessPublic;
2423                     }
2424                     else if (tag == DW_TAG_union_type)
2425                     {
2426                         tag_decl_kind = clang::TTK_Union;
2427                         default_accessibility = eAccessPublic;
2428                     }
2429                     else if (tag == DW_TAG_class_type)
2430                     {
2431                         tag_decl_kind = clang::TTK_Class;
2432                         default_accessibility = eAccessPrivate;
2433                     }
2434 
2435                     SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2436                     std::vector<clang::CXXBaseSpecifier *> base_classes;
2437                     std::vector<int> member_accessibilities;
2438                     bool is_a_class = false;
2439                     // Parse members and base classes first
2440                     DWARFDIECollection member_function_dies;
2441 
2442                     DelayedPropertyList delayed_properties;
2443                     ParseChildMembers (sc,
2444                                        dwarf_cu,
2445                                        die,
2446                                        clang_type,
2447                                        class_language,
2448                                        base_classes,
2449                                        member_accessibilities,
2450                                        member_function_dies,
2451                                        delayed_properties,
2452                                        default_accessibility,
2453                                        is_a_class,
2454                                        layout_info);
2455 
2456                     // Now parse any methods if there were any...
2457                     size_t num_functions = member_function_dies.Size();
2458                     if (num_functions > 0)
2459                     {
2460                         for (size_t i=0; i<num_functions; ++i)
2461                         {
2462                             ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2463                         }
2464                     }
2465 
2466                     if (class_language == eLanguageTypeObjC)
2467                     {
2468                         ConstString class_name (clang_type.GetTypeName());
2469                         if (class_name)
2470                         {
2471 
2472                             DIEArray method_die_offsets;
2473                             if (m_using_apple_tables)
2474                             {
2475                                 if (m_apple_objc_ap.get())
2476                                     m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2477                             }
2478                             else
2479                             {
2480                                 if (!m_indexed)
2481                                     Index ();
2482 
2483                                 m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2484                             }
2485 
2486                             if (!method_die_offsets.empty())
2487                             {
2488                                 DWARFDebugInfo* debug_info = DebugInfo();
2489 
2490                                 DWARFCompileUnit* method_cu = NULL;
2491                                 const size_t num_matches = method_die_offsets.size();
2492                                 for (size_t i=0; i<num_matches; ++i)
2493                                 {
2494                                     const dw_offset_t die_offset = method_die_offsets[i];
2495                                     DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2496 
2497                                     if (method_die)
2498                                         ResolveType (method_cu, method_die);
2499                                     else
2500                                     {
2501                                         if (m_using_apple_tables)
2502                                         {
2503                                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2504                                                                                                        die_offset, class_name.GetCString());
2505                                         }
2506                                     }
2507                                 }
2508                             }
2509 
2510                             for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2511                                  pi != pe;
2512                                  ++pi)
2513                                 pi->Finalize();
2514                         }
2515                     }
2516 
2517                     // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2518                     // need to tell the clang type it is actually a class.
2519                     if (class_language != eLanguageTypeObjC)
2520                     {
2521                         if (is_a_class && tag_decl_kind != clang::TTK_Class)
2522                             clang_type.SetTagTypeKind (clang::TTK_Class);
2523                     }
2524 
2525                     // Since DW_TAG_structure_type gets used for both classes
2526                     // and structures, we may need to set any DW_TAG_member
2527                     // fields to have a "private" access if none was specified.
2528                     // When we parsed the child members we tracked that actual
2529                     // accessibility value for each DW_TAG_member in the
2530                     // "member_accessibilities" array. If the value for the
2531                     // member is zero, then it was set to the "default_accessibility"
2532                     // which for structs was "public". Below we correct this
2533                     // by setting any fields to "private" that weren't correctly
2534                     // set.
2535                     if (is_a_class && !member_accessibilities.empty())
2536                     {
2537                         // This is a class and all members that didn't have
2538                         // their access specified are private.
2539                         clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2540                                                                     &member_accessibilities.front(),
2541                                                                     member_accessibilities.size());
2542                     }
2543 
2544                     if (!base_classes.empty())
2545                     {
2546                         clang_type.SetBaseClassesForClassType (&base_classes.front(),
2547                                                                base_classes.size());
2548 
2549                         // Clang will copy each CXXBaseSpecifier in "base_classes"
2550                         // so we have to free them all.
2551                         ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2552                                                                  base_classes.size());
2553                     }
2554                 }
2555             }
2556 
2557             clang_type.BuildIndirectFields ();
2558             clang_type.CompleteTagDeclarationDefinition ();
2559 
2560             if (!layout_info.field_offsets.empty() ||
2561                 !layout_info.base_offsets.empty()  ||
2562                 !layout_info.vbase_offsets.empty() )
2563             {
2564                 if (type)
2565                     layout_info.bit_size = type->GetByteSize() * 8;
2566                 if (layout_info.bit_size == 0)
2567                     layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2568 
2569                 clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2570                 if (record_decl)
2571                 {
2572                     if (log)
2573                     {
2574                         GetObjectFile()->GetModule()->LogMessage (log,
2575                                                                   "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])",
2576                                                                   clang_type.GetOpaqueQualType(),
2577                                                                   record_decl,
2578                                                                   layout_info.bit_size,
2579                                                                   layout_info.alignment,
2580                                                                   (uint32_t)layout_info.field_offsets.size(),
2581                                                                   (uint32_t)layout_info.base_offsets.size(),
2582                                                                   (uint32_t)layout_info.vbase_offsets.size());
2583 
2584                         uint32_t idx;
2585                         {
2586                         llvm::DenseMap <const clang::FieldDecl *, uint64_t>::const_iterator pos, end = layout_info.field_offsets.end();
2587                         for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2588                         {
2589                             GetObjectFile()->GetModule()->LogMessage (log,
2590                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }",
2591                                                                       clang_type.GetOpaqueQualType(),
2592                                                                       idx,
2593                                                                       (uint32_t)pos->second,
2594                                                                       pos->first->getNameAsString().c_str());
2595                         }
2596                         }
2597 
2598                         {
2599                         llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, base_end = layout_info.base_offsets.end();
2600                         for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx)
2601                         {
2602                             GetObjectFile()->GetModule()->LogMessage (log,
2603                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }",
2604                                                                       clang_type.GetOpaqueQualType(),
2605                                                                       idx,
2606                                                                       (uint32_t)base_pos->second.getQuantity(),
2607                                                                       base_pos->first->getNameAsString().c_str());
2608                         }
2609                         }
2610                         {
2611                         llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, vbase_end = layout_info.vbase_offsets.end();
2612                         for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx)
2613                         {
2614                             GetObjectFile()->GetModule()->LogMessage (log,
2615                                                                       "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }",
2616                                                                       clang_type.GetOpaqueQualType(),
2617                                                                       idx,
2618                                                                       (uint32_t)vbase_pos->second.getQuantity(),
2619                                                                       vbase_pos->first->getNameAsString().c_str());
2620                         }
2621                         }
2622                     }
2623                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2624                 }
2625             }
2626         }
2627 
2628         return (bool)clang_type;
2629 
2630     case DW_TAG_enumeration_type:
2631         clang_type.StartTagDeclarationDefinition ();
2632         if (die->HasChildren())
2633         {
2634             SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2635             bool is_signed = false;
2636             clang_type.IsIntegerType(is_signed);
2637             ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2638         }
2639         clang_type.CompleteTagDeclarationDefinition ();
2640         return (bool)clang_type;
2641 
2642     default:
2643         assert(false && "not a forward clang type decl!");
2644         break;
2645     }
2646     return false;
2647 }
2648 
2649 Type*
2650 SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2651 {
2652     if (type_die != NULL)
2653     {
2654         Type *type = m_die_to_type.lookup (type_die);
2655 
2656         if (type == NULL)
2657             type = GetTypeForDIE (dwarf_cu, type_die).get();
2658 
2659         if (assert_not_being_parsed)
2660         {
2661             if (type != DIE_IS_BEING_PARSED)
2662                 return type;
2663 
2664             GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2665                                                        type_die->GetOffset(),
2666                                                        DW_TAG_value_to_name(type_die->Tag()),
2667                                                        type_die->GetName(this, dwarf_cu));
2668 
2669         }
2670         else
2671             return type;
2672     }
2673     return NULL;
2674 }
2675 
2676 CompileUnit*
2677 SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2678 {
2679     // Check if the symbol vendor already knows about this compile unit?
2680     if (dwarf_cu->GetUserData() == NULL)
2681     {
2682         // The symbol vendor doesn't know about this compile unit, we
2683         // need to parse and add it to the symbol vendor object.
2684         return ParseCompileUnit(dwarf_cu, cu_idx).get();
2685     }
2686     return (CompileUnit*)dwarf_cu->GetUserData();
2687 }
2688 
2689 bool
2690 SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2691 {
2692     sc.Clear(false);
2693     // Check if the symbol vendor already knows about this compile unit?
2694     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2695 
2696     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2697     if (sc.function == NULL)
2698         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2699 
2700     if (sc.function)
2701     {
2702         sc.module_sp = sc.function->CalculateSymbolContextModule();
2703         return true;
2704     }
2705 
2706     return false;
2707 }
2708 
2709 uint32_t
2710 SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2711 {
2712     Timer scoped_timer(__PRETTY_FUNCTION__,
2713                        "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2714                        so_addr.GetSection().get(),
2715                        so_addr.GetOffset(),
2716                        resolve_scope);
2717     uint32_t resolved = 0;
2718     if (resolve_scope & (   eSymbolContextCompUnit |
2719                             eSymbolContextFunction |
2720                             eSymbolContextBlock |
2721                             eSymbolContextLineEntry))
2722     {
2723         lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2724 
2725         DWARFDebugInfo* debug_info = DebugInfo();
2726         if (debug_info)
2727         {
2728             const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2729             if (cu_offset != DW_INVALID_OFFSET)
2730             {
2731                 uint32_t cu_idx = DW_INVALID_INDEX;
2732                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
2733                 if (dwarf_cu)
2734                 {
2735                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2736                     if (sc.comp_unit)
2737                     {
2738                         resolved |= eSymbolContextCompUnit;
2739 
2740                         bool force_check_line_table = false;
2741                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2742                         {
2743                             DWARFDebugInfoEntry *function_die = NULL;
2744                             DWARFDebugInfoEntry *block_die = NULL;
2745                             if (resolve_scope & eSymbolContextBlock)
2746                             {
2747                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
2748                             }
2749                             else
2750                             {
2751                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
2752                             }
2753 
2754                             if (function_die != NULL)
2755                             {
2756                                 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2757                                 if (sc.function == NULL)
2758                                     sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2759                             }
2760                             else
2761                             {
2762                                 // We might have had a compile unit that had discontiguous
2763                                 // address ranges where the gaps are symbols that don't have
2764                                 // any debug info. Discontiguous compile unit address ranges
2765                                 // should only happen when there aren't other functions from
2766                                 // other compile units in these gaps. This helps keep the size
2767                                 // of the aranges down.
2768                                 force_check_line_table = true;
2769                             }
2770 
2771                             if (sc.function != NULL)
2772                             {
2773                                 resolved |= eSymbolContextFunction;
2774 
2775                                 if (resolve_scope & eSymbolContextBlock)
2776                                 {
2777                                     Block& block = sc.function->GetBlock (true);
2778 
2779                                     if (block_die != NULL)
2780                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2781                                     else
2782                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2783                                     if (sc.block)
2784                                         resolved |= eSymbolContextBlock;
2785                                 }
2786                             }
2787                         }
2788 
2789                         if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
2790                         {
2791                             LineTable *line_table = sc.comp_unit->GetLineTable();
2792                             if (line_table != NULL)
2793                             {
2794                                 // And address that makes it into this function should be in terms
2795                                 // of this debug file if there is no debug map, or it will be an
2796                                 // address in the .o file which needs to be fixed up to be in terms
2797                                 // of the debug map executable. Either way, calling FixupAddress()
2798                                 // will work for us.
2799                                 Address exe_so_addr (so_addr);
2800                                 if (FixupAddress(exe_so_addr))
2801                                 {
2802                                     if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
2803                                     {
2804                                         resolved |= eSymbolContextLineEntry;
2805                                     }
2806                                 }
2807                             }
2808                         }
2809 
2810                         if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
2811                         {
2812                             // We might have had a compile unit that had discontiguous
2813                             // address ranges where the gaps are symbols that don't have
2814                             // any debug info. Discontiguous compile unit address ranges
2815                             // should only happen when there aren't other functions from
2816                             // other compile units in these gaps. This helps keep the size
2817                             // of the aranges down.
2818                             sc.comp_unit = NULL;
2819                             resolved &= ~eSymbolContextCompUnit;
2820                         }
2821                     }
2822                     else
2823                     {
2824                         GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
2825                                                                      cu_offset,
2826                                                                      cu_idx);
2827                     }
2828                 }
2829             }
2830         }
2831     }
2832     return resolved;
2833 }
2834 
2835 
2836 
2837 uint32_t
2838 SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
2839 {
2840     const uint32_t prev_size = sc_list.GetSize();
2841     if (resolve_scope & eSymbolContextCompUnit)
2842     {
2843         DWARFDebugInfo* debug_info = DebugInfo();
2844         if (debug_info)
2845         {
2846             uint32_t cu_idx;
2847             DWARFCompileUnit* dwarf_cu = NULL;
2848 
2849             for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
2850             {
2851                 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2852                 const bool full_match = (bool)file_spec.GetDirectory();
2853                 bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
2854                 if (check_inlines || file_spec_matches_cu_file_spec)
2855                 {
2856                     SymbolContext sc (m_obj_file->GetModule());
2857                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2858                     if (sc.comp_unit)
2859                     {
2860                         uint32_t file_idx = UINT32_MAX;
2861 
2862                         // If we are looking for inline functions only and we don't
2863                         // find it in the support files, we are done.
2864                         if (check_inlines)
2865                         {
2866                             file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2867                             if (file_idx == UINT32_MAX)
2868                                 continue;
2869                         }
2870 
2871                         if (line != 0)
2872                         {
2873                             LineTable *line_table = sc.comp_unit->GetLineTable();
2874 
2875                             if (line_table != NULL && line != 0)
2876                             {
2877                                 // We will have already looked up the file index if
2878                                 // we are searching for inline entries.
2879                                 if (!check_inlines)
2880                                     file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2881 
2882                                 if (file_idx != UINT32_MAX)
2883                                 {
2884                                     uint32_t found_line;
2885                                     uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
2886                                     found_line = sc.line_entry.line;
2887 
2888                                     while (line_idx != UINT32_MAX)
2889                                     {
2890                                         sc.function = NULL;
2891                                         sc.block = NULL;
2892                                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2893                                         {
2894                                             const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
2895                                             if (file_vm_addr != LLDB_INVALID_ADDRESS)
2896                                             {
2897                                                 DWARFDebugInfoEntry *function_die = NULL;
2898                                                 DWARFDebugInfoEntry *block_die = NULL;
2899                                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
2900 
2901                                                 if (function_die != NULL)
2902                                                 {
2903                                                     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2904                                                     if (sc.function == NULL)
2905                                                         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2906                                                 }
2907 
2908                                                 if (sc.function != NULL)
2909                                                 {
2910                                                     Block& block = sc.function->GetBlock (true);
2911 
2912                                                     if (block_die != NULL)
2913                                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2914                                                     else
2915                                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2916                                                 }
2917                                             }
2918                                         }
2919 
2920                                         sc_list.Append(sc);
2921                                         line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
2922                                     }
2923                                 }
2924                             }
2925                             else if (file_spec_matches_cu_file_spec && !check_inlines)
2926                             {
2927                                 // only append the context if we aren't looking for inline call sites
2928                                 // by file and line and if the file spec matches that of the compile unit
2929                                 sc_list.Append(sc);
2930                             }
2931                         }
2932                         else if (file_spec_matches_cu_file_spec && !check_inlines)
2933                         {
2934                             // only append the context if we aren't looking for inline call sites
2935                             // by file and line and if the file spec matches that of the compile unit
2936                             sc_list.Append(sc);
2937                         }
2938 
2939                         if (!check_inlines)
2940                             break;
2941                     }
2942                 }
2943             }
2944         }
2945     }
2946     return sc_list.GetSize() - prev_size;
2947 }
2948 
2949 void
2950 SymbolFileDWARF::Index ()
2951 {
2952     if (m_indexed)
2953         return;
2954     m_indexed = true;
2955     Timer scoped_timer (__PRETTY_FUNCTION__,
2956                         "SymbolFileDWARF::Index (%s)",
2957                         GetObjectFile()->GetFileSpec().GetFilename().AsCString());
2958 
2959     DWARFDebugInfo* debug_info = DebugInfo();
2960     if (debug_info)
2961     {
2962         uint32_t cu_idx = 0;
2963         const uint32_t num_compile_units = GetNumCompileUnits();
2964         for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
2965         {
2966             DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2967 
2968             bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
2969 
2970             dwarf_cu->Index (cu_idx,
2971                              m_function_basename_index,
2972                              m_function_fullname_index,
2973                              m_function_method_index,
2974                              m_function_selector_index,
2975                              m_objc_class_selectors_index,
2976                              m_global_index,
2977                              m_type_index,
2978                              m_namespace_index);
2979 
2980             // Keep memory down by clearing DIEs if this generate function
2981             // caused them to be parsed
2982             if (clear_dies)
2983                 dwarf_cu->ClearDIEs (true);
2984         }
2985 
2986         m_function_basename_index.Finalize();
2987         m_function_fullname_index.Finalize();
2988         m_function_method_index.Finalize();
2989         m_function_selector_index.Finalize();
2990         m_objc_class_selectors_index.Finalize();
2991         m_global_index.Finalize();
2992         m_type_index.Finalize();
2993         m_namespace_index.Finalize();
2994 
2995 #if defined (ENABLE_DEBUG_PRINTF)
2996         StreamFile s(stdout, false);
2997         s.Printf ("DWARF index for '%s':",
2998                   GetObjectFile()->GetFileSpec().GetPath().c_str());
2999         s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
3000         s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
3001         s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
3002         s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
3003         s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
3004         s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
3005         s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
3006         s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
3007 #endif
3008     }
3009 }
3010 
3011 bool
3012 SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3013 {
3014     if (namespace_decl == NULL)
3015     {
3016         // Invalid namespace decl which means we aren't matching only things
3017         // in this symbol file, so return true to indicate it matches this
3018         // symbol file.
3019         return true;
3020     }
3021 
3022     clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3023 
3024     if (namespace_ast == NULL)
3025         return true;    // No AST in the "namespace_decl", return true since it
3026                         // could then match any symbol file, including this one
3027 
3028     if (namespace_ast == GetClangASTContext().getASTContext())
3029         return true;    // The ASTs match, return true
3030 
3031     // The namespace AST was valid, and it does not match...
3032     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3033 
3034     if (log)
3035         GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3036 
3037     return false;
3038 }
3039 
3040 bool
3041 SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3042                                    DWARFCompileUnit* cu,
3043                                    const DWARFDebugInfoEntry* die)
3044 {
3045     // No namespace specified, so the answesr i
3046     if (namespace_decl == NULL)
3047         return true;
3048 
3049     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3050 
3051     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3052     clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3053     if (decl_ctx_die)
3054     {
3055         clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3056 
3057         if (clang_namespace_decl)
3058         {
3059             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3060             {
3061                 if (log)
3062                     GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3063                 return false;
3064             }
3065 
3066             if (clang_namespace_decl == die_clang_decl_ctx)
3067                 return true;
3068             else
3069                 return false;
3070         }
3071         else
3072         {
3073             // We have a namespace_decl that was not NULL but it contained
3074             // a NULL "clang::NamespaceDecl", so this means the global namespace
3075             // So as long the the contained decl context DIE isn't a namespace
3076             // we should be ok.
3077             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3078                 return true;
3079         }
3080     }
3081 
3082     if (log)
3083         GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3084 
3085     return false;
3086 }
3087 uint32_t
3088 SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3089 {
3090     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3091 
3092     if (log)
3093     {
3094         GetObjectFile()->GetModule()->LogMessage (log,
3095                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3096                                                   name.GetCString(),
3097                                                   namespace_decl,
3098                                                   append,
3099                                                   max_matches);
3100     }
3101 
3102     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3103 		return 0;
3104 
3105     DWARFDebugInfo* info = DebugInfo();
3106     if (info == NULL)
3107         return 0;
3108 
3109     // If we aren't appending the results to this list, then clear the list
3110     if (!append)
3111         variables.Clear();
3112 
3113     // Remember how many variables are in the list before we search in case
3114     // we are appending the results to a variable list.
3115     const uint32_t original_size = variables.GetSize();
3116 
3117     DIEArray die_offsets;
3118 
3119     if (m_using_apple_tables)
3120     {
3121         if (m_apple_names_ap.get())
3122         {
3123             const char *name_cstr = name.GetCString();
3124             const char *base_name_start;
3125             const char *base_name_end = NULL;
3126 
3127             if (!CPPLanguageRuntime::StripNamespacesFromVariableName(name_cstr, base_name_start, base_name_end))
3128                 base_name_start = name_cstr;
3129 
3130             m_apple_names_ap->FindByName (base_name_start, die_offsets);
3131         }
3132     }
3133     else
3134     {
3135         // Index the DWARF if we haven't already
3136         if (!m_indexed)
3137             Index ();
3138 
3139         m_global_index.Find (name, die_offsets);
3140     }
3141 
3142     const size_t num_die_matches = die_offsets.size();
3143     if (num_die_matches)
3144     {
3145         SymbolContext sc;
3146         sc.module_sp = m_obj_file->GetModule();
3147         assert (sc.module_sp);
3148 
3149         DWARFDebugInfo* debug_info = DebugInfo();
3150         DWARFCompileUnit* dwarf_cu = NULL;
3151         const DWARFDebugInfoEntry* die = NULL;
3152         bool done = false;
3153         for (size_t i=0; i<num_die_matches && !done; ++i)
3154         {
3155             const dw_offset_t die_offset = die_offsets[i];
3156             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3157 
3158             if (die)
3159             {
3160                 switch (die->Tag())
3161                 {
3162                     default:
3163                     case DW_TAG_subprogram:
3164                     case DW_TAG_inlined_subroutine:
3165                     case DW_TAG_try_block:
3166                     case DW_TAG_catch_block:
3167                         break;
3168 
3169                     case DW_TAG_variable:
3170                         {
3171                             sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3172 
3173                             if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3174                                 continue;
3175 
3176                             ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3177 
3178                             if (variables.GetSize() - original_size >= max_matches)
3179                                 done = true;
3180                         }
3181                         break;
3182                 }
3183             }
3184             else
3185             {
3186                 if (m_using_apple_tables)
3187                 {
3188                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3189                                                                                die_offset, name.GetCString());
3190                 }
3191             }
3192         }
3193     }
3194 
3195     // Return the number of variable that were appended to the list
3196     const uint32_t num_matches = variables.GetSize() - original_size;
3197     if (log && num_matches > 0)
3198     {
3199         GetObjectFile()->GetModule()->LogMessage (log,
3200                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3201                                                   name.GetCString(),
3202                                                   namespace_decl,
3203                                                   append,
3204                                                   max_matches,
3205                                                   num_matches);
3206     }
3207     return num_matches;
3208 }
3209 
3210 uint32_t
3211 SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3212 {
3213     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3214 
3215     if (log)
3216     {
3217         GetObjectFile()->GetModule()->LogMessage (log,
3218                                                   "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3219                                                   regex.GetText(),
3220                                                   append,
3221                                                   max_matches);
3222     }
3223 
3224     DWARFDebugInfo* info = DebugInfo();
3225     if (info == NULL)
3226         return 0;
3227 
3228     // If we aren't appending the results to this list, then clear the list
3229     if (!append)
3230         variables.Clear();
3231 
3232     // Remember how many variables are in the list before we search in case
3233     // we are appending the results to a variable list.
3234     const uint32_t original_size = variables.GetSize();
3235 
3236     DIEArray die_offsets;
3237 
3238     if (m_using_apple_tables)
3239     {
3240         if (m_apple_names_ap.get())
3241         {
3242             DWARFMappedHash::DIEInfoArray hash_data_array;
3243             if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3244                 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3245         }
3246     }
3247     else
3248     {
3249         // Index the DWARF if we haven't already
3250         if (!m_indexed)
3251             Index ();
3252 
3253         m_global_index.Find (regex, die_offsets);
3254     }
3255 
3256     SymbolContext sc;
3257     sc.module_sp = m_obj_file->GetModule();
3258     assert (sc.module_sp);
3259 
3260     DWARFCompileUnit* dwarf_cu = NULL;
3261     const DWARFDebugInfoEntry* die = NULL;
3262     const size_t num_matches = die_offsets.size();
3263     if (num_matches)
3264     {
3265         DWARFDebugInfo* debug_info = DebugInfo();
3266         for (size_t i=0; i<num_matches; ++i)
3267         {
3268             const dw_offset_t die_offset = die_offsets[i];
3269             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3270 
3271             if (die)
3272             {
3273                 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3274 
3275                 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3276 
3277                 if (variables.GetSize() - original_size >= max_matches)
3278                     break;
3279             }
3280             else
3281             {
3282                 if (m_using_apple_tables)
3283                 {
3284                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3285                                                                                die_offset, regex.GetText());
3286                 }
3287             }
3288         }
3289     }
3290 
3291     // Return the number of variable that were appended to the list
3292     return variables.GetSize() - original_size;
3293 }
3294 
3295 
3296 bool
3297 SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3298                                   DWARFCompileUnit *&dwarf_cu,
3299                                   SymbolContextList& sc_list)
3300 {
3301     const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3302     return ResolveFunction (dwarf_cu, die, sc_list);
3303 }
3304 
3305 
3306 bool
3307 SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3308                                   const DWARFDebugInfoEntry *die,
3309                                   SymbolContextList& sc_list)
3310 {
3311     SymbolContext sc;
3312 
3313     if (die == NULL)
3314         return false;
3315 
3316     // If we were passed a die that is not a function, just return false...
3317     if (die->Tag() != DW_TAG_subprogram && die->Tag() != DW_TAG_inlined_subroutine)
3318         return false;
3319 
3320     const DWARFDebugInfoEntry* inlined_die = NULL;
3321     if (die->Tag() == DW_TAG_inlined_subroutine)
3322     {
3323         inlined_die = die;
3324 
3325         while ((die = die->GetParent()) != NULL)
3326         {
3327             if (die->Tag() == DW_TAG_subprogram)
3328                 break;
3329         }
3330     }
3331     assert (die->Tag() == DW_TAG_subprogram);
3332     if (GetFunction (cu, die, sc))
3333     {
3334         Address addr;
3335         // Parse all blocks if needed
3336         if (inlined_die)
3337         {
3338             sc.block = sc.function->GetBlock (true).FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3339             assert (sc.block != NULL);
3340             if (sc.block->GetStartAddress (addr) == false)
3341                 addr.Clear();
3342         }
3343         else
3344         {
3345             sc.block = NULL;
3346             addr = sc.function->GetAddressRange().GetBaseAddress();
3347         }
3348 
3349         if (addr.IsValid())
3350         {
3351             sc_list.Append(sc);
3352             return true;
3353         }
3354     }
3355 
3356     return false;
3357 }
3358 
3359 void
3360 SymbolFileDWARF::FindFunctions (const ConstString &name,
3361                                 const NameToDIE &name_to_die,
3362                                 SymbolContextList& sc_list)
3363 {
3364     DIEArray die_offsets;
3365     if (name_to_die.Find (name, die_offsets))
3366     {
3367         ParseFunctions (die_offsets, sc_list);
3368     }
3369 }
3370 
3371 
3372 void
3373 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3374                                 const NameToDIE &name_to_die,
3375                                 SymbolContextList& sc_list)
3376 {
3377     DIEArray die_offsets;
3378     if (name_to_die.Find (regex, die_offsets))
3379     {
3380         ParseFunctions (die_offsets, sc_list);
3381     }
3382 }
3383 
3384 
3385 void
3386 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3387                                 const DWARFMappedHash::MemoryTable &memory_table,
3388                                 SymbolContextList& sc_list)
3389 {
3390     DIEArray die_offsets;
3391     DWARFMappedHash::DIEInfoArray hash_data_array;
3392     if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3393     {
3394         DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3395         ParseFunctions (die_offsets, sc_list);
3396     }
3397 }
3398 
3399 void
3400 SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3401                                  SymbolContextList& sc_list)
3402 {
3403     const size_t num_matches = die_offsets.size();
3404     if (num_matches)
3405     {
3406         SymbolContext sc;
3407 
3408         DWARFCompileUnit* dwarf_cu = NULL;
3409         for (size_t i=0; i<num_matches; ++i)
3410         {
3411             const dw_offset_t die_offset = die_offsets[i];
3412             ResolveFunction (die_offset, dwarf_cu, sc_list);
3413         }
3414     }
3415 }
3416 
3417 bool
3418 SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3419                                                 const DWARFCompileUnit *dwarf_cu,
3420                                                 uint32_t name_type_mask,
3421                                                 const char *partial_name,
3422                                                 const char *base_name_start,
3423                                                 const char *base_name_end)
3424 {
3425     // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3426     if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3427     {
3428         clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3429         if (!containing_decl_ctx)
3430             return false;
3431 
3432         bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3433 
3434         if (name_type_mask == eFunctionNameTypeMethod)
3435         {
3436             if (is_cxx_method == false)
3437                 return false;
3438         }
3439 
3440         if (name_type_mask == eFunctionNameTypeBase)
3441         {
3442             if (is_cxx_method == true)
3443                 return false;
3444         }
3445     }
3446 
3447     // Now we need to check whether the name we got back for this type matches the extra specifications
3448     // that were in the name we're looking up:
3449     if (base_name_start != partial_name || *base_name_end != '\0')
3450     {
3451         // First see if the stuff to the left matches the full name.  To do that let's see if
3452         // we can pull out the mips linkage name attribute:
3453 
3454         Mangled best_name;
3455         DWARFDebugInfoEntry::Attributes attributes;
3456         DWARFFormValue form_value;
3457         die->GetAttributes(this, dwarf_cu, NULL, attributes);
3458         uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3459         if (idx == UINT32_MAX)
3460             idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3461         if (idx != UINT32_MAX)
3462         {
3463             if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3464             {
3465                 const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3466                 if (mangled_name)
3467                     best_name.SetValue (ConstString(mangled_name), true);
3468             }
3469         }
3470 
3471         if (!best_name)
3472         {
3473             idx = attributes.FindAttributeIndex(DW_AT_name);
3474             if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3475             {
3476                 const char *name = form_value.AsCString(&get_debug_str_data());
3477                 best_name.SetValue (ConstString(name), false);
3478             }
3479         }
3480 
3481         if (best_name.GetDemangledName())
3482         {
3483             const char *demangled = best_name.GetDemangledName().GetCString();
3484             if (demangled)
3485             {
3486                 std::string name_no_parens(partial_name, base_name_end - partial_name);
3487                 const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3488                 if (partial_in_demangled == NULL)
3489                     return false;
3490                 else
3491                 {
3492                     // Sort out the case where our name is something like "Process::Destroy" and the match is
3493                     // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3494                     // namespace boundaries...
3495 
3496                     if (partial_name[0] == ':'  && partial_name[1] == ':')
3497                     {
3498                         // The partial name was already on a namespace boundary so all matches are good.
3499                         return true;
3500                     }
3501                     else if (partial_in_demangled == demangled)
3502                     {
3503                         // They both start the same, so this is an good match.
3504                         return true;
3505                     }
3506                     else
3507                     {
3508                         if (partial_in_demangled - demangled == 1)
3509                         {
3510                             // Only one character difference, can't be a namespace boundary...
3511                             return false;
3512                         }
3513                         else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3514                         {
3515                             // We are on a namespace boundary, so this is also good.
3516                             return true;
3517                         }
3518                         else
3519                             return false;
3520                     }
3521                 }
3522             }
3523         }
3524     }
3525 
3526     return true;
3527 }
3528 
3529 uint32_t
3530 SymbolFileDWARF::FindFunctions (const ConstString &name,
3531                                 const lldb_private::ClangNamespaceDecl *namespace_decl,
3532                                 uint32_t name_type_mask,
3533                                 bool include_inlines,
3534                                 bool append,
3535                                 SymbolContextList& sc_list)
3536 {
3537     Timer scoped_timer (__PRETTY_FUNCTION__,
3538                         "SymbolFileDWARF::FindFunctions (name = '%s')",
3539                         name.AsCString());
3540 
3541     // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3542     assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3543 
3544     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3545 
3546     if (log)
3547     {
3548         GetObjectFile()->GetModule()->LogMessage (log,
3549                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3550                                                   name.GetCString(),
3551                                                   name_type_mask,
3552                                                   append);
3553     }
3554 
3555     // If we aren't appending the results to this list, then clear the list
3556     if (!append)
3557         sc_list.Clear();
3558 
3559     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3560 		return 0;
3561 
3562     // If name is empty then we won't find anything.
3563     if (name.IsEmpty())
3564         return 0;
3565 
3566     // Remember how many sc_list are in the list before we search in case
3567     // we are appending the results to a variable list.
3568 
3569     const char *name_cstr = name.GetCString();
3570 
3571     const uint32_t original_size = sc_list.GetSize();
3572 
3573     DWARFDebugInfo* info = DebugInfo();
3574     if (info == NULL)
3575         return 0;
3576 
3577     DWARFCompileUnit *dwarf_cu = NULL;
3578     std::set<const DWARFDebugInfoEntry *> resolved_dies;
3579     if (m_using_apple_tables)
3580     {
3581         if (m_apple_names_ap.get())
3582         {
3583 
3584             DIEArray die_offsets;
3585 
3586             uint32_t num_matches = 0;
3587 
3588             if (name_type_mask & eFunctionNameTypeFull)
3589             {
3590                 // If they asked for the full name, match what they typed.  At some point we may
3591                 // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3592                 // dies that we find by exact match.
3593                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3594                 for (uint32_t i = 0; i < num_matches; i++)
3595                 {
3596                     const dw_offset_t die_offset = die_offsets[i];
3597                     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3598                     if (die)
3599                     {
3600                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3601                             continue;
3602 
3603                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3604                             continue;
3605 
3606                         if (resolved_dies.find(die) == resolved_dies.end())
3607                         {
3608                             if (ResolveFunction (dwarf_cu, die, sc_list))
3609                                 resolved_dies.insert(die);
3610                         }
3611                     }
3612                     else
3613                     {
3614                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3615                                                                                    die_offset, name_cstr);
3616                     }
3617                 }
3618             }
3619 
3620             if (name_type_mask & eFunctionNameTypeSelector)
3621             {
3622                 if (namespace_decl && *namespace_decl)
3623                     return 0; // no selectors in namespaces
3624 
3625                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3626                 // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3627                 // and if it is an ObjC method name, we're good.
3628 
3629                 for (uint32_t i = 0; i < num_matches; i++)
3630                 {
3631                     const dw_offset_t die_offset = die_offsets[i];
3632                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3633                     if (die)
3634                     {
3635                         const char *die_name = die->GetName(this, dwarf_cu);
3636                         if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3637                         {
3638                             if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3639                                 continue;
3640 
3641                             if (resolved_dies.find(die) == resolved_dies.end())
3642                             {
3643                                 if (ResolveFunction (dwarf_cu, die, sc_list))
3644                                     resolved_dies.insert(die);
3645                             }
3646                         }
3647                     }
3648                     else
3649                     {
3650                         GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3651                                                                    die_offset, name_cstr);
3652                     }
3653                 }
3654                 die_offsets.clear();
3655             }
3656 
3657             if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3658             {
3659                 // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3660                 // extract the base name, look that up, and if there is any other information in the name we were
3661                 // passed in we have to post-filter based on that.
3662 
3663                 // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3664                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3665 
3666                 for (uint32_t i = 0; i < num_matches; i++)
3667                 {
3668                     const dw_offset_t die_offset = die_offsets[i];
3669                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3670                     if (die)
3671                     {
3672                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3673                             continue;
3674 
3675                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3676                             continue;
3677 
3678                         // If we get to here, the die is good, and we should add it:
3679                         if (resolved_dies.find(die) == resolved_dies.end())
3680                         if (ResolveFunction (dwarf_cu, die, sc_list))
3681                         {
3682                             bool keep_die = true;
3683                             if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3684                             {
3685                                 // We are looking for either basenames or methods, so we need to
3686                                 // trim out the ones we won't want by looking at the type
3687                                 SymbolContext sc;
3688                                 if (sc_list.GetLastContext(sc))
3689                                 {
3690                                     if (sc.block)
3691                                     {
3692                                         // We have an inlined function
3693                                     }
3694                                     else if (sc.function)
3695                                     {
3696                                         Type *type = sc.function->GetType();
3697 
3698                                         if (type)
3699                                         {
3700                                             clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3701                                             if (decl_ctx->isRecord())
3702                                             {
3703                                                 if (name_type_mask & eFunctionNameTypeBase)
3704                                                 {
3705                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3706                                                     keep_die = false;
3707                                                 }
3708                                             }
3709                                             else
3710                                             {
3711                                                 if (name_type_mask & eFunctionNameTypeMethod)
3712                                                 {
3713                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3714                                                     keep_die = false;
3715                                                 }
3716                                             }
3717                                         }
3718                                         else
3719                                         {
3720                                             GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
3721                                                                                          die_offset);
3722                                         }
3723                                     }
3724                                 }
3725                             }
3726                             if (keep_die)
3727                                 resolved_dies.insert(die);
3728                         }
3729                     }
3730                     else
3731                     {
3732                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3733                                                                                    die_offset, name_cstr);
3734                     }
3735                 }
3736                 die_offsets.clear();
3737             }
3738         }
3739     }
3740     else
3741     {
3742 
3743         // Index the DWARF if we haven't already
3744         if (!m_indexed)
3745             Index ();
3746 
3747         if (name_type_mask & eFunctionNameTypeFull)
3748         {
3749             FindFunctions (name, m_function_fullname_index, sc_list);
3750 
3751             // FIXME Temporary workaround for global/anonymous namespace
3752             // functions on FreeBSD and Linux
3753 #if defined (__FreeBSD__) || defined (__linux__)
3754             // If we didn't find any functions in the global namespace try
3755             // looking in the basename index but ignore any returned
3756             // functions that have a namespace (ie. mangled names starting with
3757             // '_ZN') but keep functions which have an anonymous namespace
3758             if (sc_list.GetSize() == 0)
3759             {
3760                 SymbolContextList temp_sc_list;
3761                 FindFunctions (name, m_function_basename_index, temp_sc_list);
3762                 if (!namespace_decl)
3763                 {
3764                     SymbolContext sc;
3765                     for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
3766                     {
3767                         if (temp_sc_list.GetContextAtIndex(i, sc))
3768                         {
3769                             ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
3770                             ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
3771                             if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
3772                                 !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
3773                             {
3774                                 sc_list.Append(sc);
3775                             }
3776                         }
3777                     }
3778                 }
3779             }
3780 #endif
3781         }
3782         DIEArray die_offsets;
3783         DWARFCompileUnit *dwarf_cu = NULL;
3784 
3785         if (name_type_mask & eFunctionNameTypeBase)
3786         {
3787             uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
3788             for (uint32_t i = 0; i < num_base; i++)
3789             {
3790                 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3791                 if (die)
3792                 {
3793                     if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3794                         continue;
3795 
3796                     if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3797                         continue;
3798 
3799                     // If we get to here, the die is good, and we should add it:
3800                     if (resolved_dies.find(die) == resolved_dies.end())
3801                     {
3802                         if (ResolveFunction (dwarf_cu, die, sc_list))
3803                             resolved_dies.insert(die);
3804                     }
3805                 }
3806             }
3807             die_offsets.clear();
3808         }
3809 
3810         if (name_type_mask & eFunctionNameTypeMethod)
3811         {
3812             if (namespace_decl && *namespace_decl)
3813                 return 0; // no methods in namespaces
3814 
3815             uint32_t num_base = m_function_method_index.Find(name, die_offsets);
3816             {
3817                 for (uint32_t i = 0; i < num_base; i++)
3818                 {
3819                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3820                     if (die)
3821                     {
3822                         if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3823                             continue;
3824 
3825                         // If we get to here, the die is good, and we should add it:
3826                         if (resolved_dies.find(die) == resolved_dies.end())
3827                         {
3828                             if (ResolveFunction (dwarf_cu, die, sc_list))
3829                                 resolved_dies.insert(die);
3830                         }
3831                     }
3832                 }
3833             }
3834             die_offsets.clear();
3835         }
3836 
3837         if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
3838         {
3839             FindFunctions (name, m_function_selector_index, sc_list);
3840         }
3841 
3842     }
3843 
3844     // Return the number of variable that were appended to the list
3845     const uint32_t num_matches = sc_list.GetSize() - original_size;
3846 
3847     if (log && num_matches > 0)
3848     {
3849         GetObjectFile()->GetModule()->LogMessage (log,
3850                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list) => %u",
3851                                                   name.GetCString(),
3852                                                   name_type_mask,
3853                                                   append,
3854                                                   num_matches);
3855     }
3856     return num_matches;
3857 }
3858 
3859 uint32_t
3860 SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
3861 {
3862     Timer scoped_timer (__PRETTY_FUNCTION__,
3863                         "SymbolFileDWARF::FindFunctions (regex = '%s')",
3864                         regex.GetText());
3865 
3866     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3867 
3868     if (log)
3869     {
3870         GetObjectFile()->GetModule()->LogMessage (log,
3871                                                   "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
3872                                                   regex.GetText(),
3873                                                   append);
3874     }
3875 
3876 
3877     // If we aren't appending the results to this list, then clear the list
3878     if (!append)
3879         sc_list.Clear();
3880 
3881     // Remember how many sc_list are in the list before we search in case
3882     // we are appending the results to a variable list.
3883     uint32_t original_size = sc_list.GetSize();
3884 
3885     if (m_using_apple_tables)
3886     {
3887         if (m_apple_names_ap.get())
3888             FindFunctions (regex, *m_apple_names_ap, sc_list);
3889     }
3890     else
3891     {
3892         // Index the DWARF if we haven't already
3893         if (!m_indexed)
3894             Index ();
3895 
3896         FindFunctions (regex, m_function_basename_index, sc_list);
3897 
3898         FindFunctions (regex, m_function_fullname_index, sc_list);
3899     }
3900 
3901     // Return the number of variable that were appended to the list
3902     return sc_list.GetSize() - original_size;
3903 }
3904 
3905 uint32_t
3906 SymbolFileDWARF::FindTypes (const SymbolContext& sc,
3907                             const ConstString &name,
3908                             const lldb_private::ClangNamespaceDecl *namespace_decl,
3909                             bool append,
3910                             uint32_t max_matches,
3911                             TypeList& types)
3912 {
3913     DWARFDebugInfo* info = DebugInfo();
3914     if (info == NULL)
3915         return 0;
3916 
3917     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3918 
3919     if (log)
3920     {
3921         if (namespace_decl)
3922         {
3923             GetObjectFile()->GetModule()->LogMessage (log,
3924                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
3925                                                       name.GetCString(),
3926                                                       namespace_decl->GetNamespaceDecl(),
3927                                                       namespace_decl->GetQualifiedName().c_str(),
3928                                                       append,
3929                                                       max_matches);
3930         }
3931         else
3932         {
3933             GetObjectFile()->GetModule()->LogMessage (log,
3934                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
3935                                                       name.GetCString(),
3936                                                       append,
3937                                                       max_matches);
3938         }
3939     }
3940 
3941     // If we aren't appending the results to this list, then clear the list
3942     if (!append)
3943         types.Clear();
3944 
3945     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3946 		return 0;
3947 
3948     DIEArray die_offsets;
3949 
3950     if (m_using_apple_tables)
3951     {
3952         if (m_apple_types_ap.get())
3953         {
3954             const char *name_cstr = name.GetCString();
3955             m_apple_types_ap->FindByName (name_cstr, die_offsets);
3956         }
3957     }
3958     else
3959     {
3960         if (!m_indexed)
3961             Index ();
3962 
3963         m_type_index.Find (name, die_offsets);
3964     }
3965 
3966     const size_t num_die_matches = die_offsets.size();
3967 
3968     if (num_die_matches)
3969     {
3970         const uint32_t initial_types_size = types.GetSize();
3971         DWARFCompileUnit* dwarf_cu = NULL;
3972         const DWARFDebugInfoEntry* die = NULL;
3973         DWARFDebugInfo* debug_info = DebugInfo();
3974         for (size_t i=0; i<num_die_matches; ++i)
3975         {
3976             const dw_offset_t die_offset = die_offsets[i];
3977             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3978 
3979             if (die)
3980             {
3981                 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3982                     continue;
3983 
3984                 Type *matching_type = ResolveType (dwarf_cu, die);
3985                 if (matching_type)
3986                 {
3987                     // We found a type pointer, now find the shared pointer form our type list
3988                     types.InsertUnique (matching_type->shared_from_this());
3989                     if (types.GetSize() >= max_matches)
3990                         break;
3991                 }
3992             }
3993             else
3994             {
3995                 if (m_using_apple_tables)
3996                 {
3997                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
3998                                                                                die_offset, name.GetCString());
3999                 }
4000             }
4001 
4002         }
4003         const uint32_t num_matches = types.GetSize() - initial_types_size;
4004         if (log && num_matches)
4005         {
4006             if (namespace_decl)
4007             {
4008                 GetObjectFile()->GetModule()->LogMessage (log,
4009                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4010                                                           name.GetCString(),
4011                                                           namespace_decl->GetNamespaceDecl(),
4012                                                           namespace_decl->GetQualifiedName().c_str(),
4013                                                           append,
4014                                                           max_matches,
4015                                                           num_matches);
4016             }
4017             else
4018             {
4019                 GetObjectFile()->GetModule()->LogMessage (log,
4020                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4021                                                           name.GetCString(),
4022                                                           append,
4023                                                           max_matches,
4024                                                           num_matches);
4025             }
4026         }
4027         return num_matches;
4028     }
4029     return 0;
4030 }
4031 
4032 
4033 ClangNamespaceDecl
4034 SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4035                                 const ConstString &name,
4036                                 const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4037 {
4038     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4039 
4040     if (log)
4041     {
4042         GetObjectFile()->GetModule()->LogMessage (log,
4043                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4044                                                   name.GetCString());
4045     }
4046 
4047     if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4048 		return ClangNamespaceDecl();
4049 
4050     ClangNamespaceDecl namespace_decl;
4051     DWARFDebugInfo* info = DebugInfo();
4052     if (info)
4053     {
4054         DIEArray die_offsets;
4055 
4056         // Index if we already haven't to make sure the compile units
4057         // get indexed and make their global DIE index list
4058         if (m_using_apple_tables)
4059         {
4060             if (m_apple_namespaces_ap.get())
4061             {
4062                 const char *name_cstr = name.GetCString();
4063                 m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4064             }
4065         }
4066         else
4067         {
4068             if (!m_indexed)
4069                 Index ();
4070 
4071             m_namespace_index.Find (name, die_offsets);
4072         }
4073 
4074         DWARFCompileUnit* dwarf_cu = NULL;
4075         const DWARFDebugInfoEntry* die = NULL;
4076         const size_t num_matches = die_offsets.size();
4077         if (num_matches)
4078         {
4079             DWARFDebugInfo* debug_info = DebugInfo();
4080             for (size_t i=0; i<num_matches; ++i)
4081             {
4082                 const dw_offset_t die_offset = die_offsets[i];
4083                 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4084 
4085                 if (die)
4086                 {
4087                     if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4088                         continue;
4089 
4090                     clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4091                     if (clang_namespace_decl)
4092                     {
4093                         namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4094                         namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4095                         break;
4096                     }
4097                 }
4098                 else
4099                 {
4100                     if (m_using_apple_tables)
4101                     {
4102                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4103                                                                    die_offset, name.GetCString());
4104                     }
4105                 }
4106 
4107             }
4108         }
4109     }
4110     if (log && namespace_decl.GetNamespaceDecl())
4111     {
4112         GetObjectFile()->GetModule()->LogMessage (log,
4113                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4114                                                   name.GetCString(),
4115                                                   namespace_decl.GetNamespaceDecl(),
4116                                                   namespace_decl.GetQualifiedName().c_str());
4117     }
4118 
4119     return namespace_decl;
4120 }
4121 
4122 uint32_t
4123 SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4124 {
4125     // Remember how many sc_list are in the list before we search in case
4126     // we are appending the results to a variable list.
4127     uint32_t original_size = types.GetSize();
4128 
4129     const uint32_t num_die_offsets = die_offsets.size();
4130     // Parse all of the types we found from the pubtypes matches
4131     uint32_t i;
4132     uint32_t num_matches = 0;
4133     for (i = 0; i < num_die_offsets; ++i)
4134     {
4135         Type *matching_type = ResolveTypeUID (die_offsets[i]);
4136         if (matching_type)
4137         {
4138             // We found a type pointer, now find the shared pointer form our type list
4139             types.InsertUnique (matching_type->shared_from_this());
4140             ++num_matches;
4141             if (num_matches >= max_matches)
4142                 break;
4143         }
4144     }
4145 
4146     // Return the number of variable that were appended to the list
4147     return types.GetSize() - original_size;
4148 }
4149 
4150 
4151 size_t
4152 SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4153                                        clang::DeclContext *containing_decl_ctx,
4154                                        DWARFCompileUnit* dwarf_cu,
4155                                        const DWARFDebugInfoEntry *parent_die,
4156                                        bool skip_artificial,
4157                                        bool &is_static,
4158                                        TypeList* type_list,
4159                                        std::vector<ClangASTType>& function_param_types,
4160                                        std::vector<clang::ParmVarDecl*>& function_param_decls,
4161                                        unsigned &type_quals,
4162                                        ClangASTContext::TemplateParameterInfos &template_param_infos)
4163 {
4164     if (parent_die == NULL)
4165         return 0;
4166 
4167     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4168 
4169     size_t arg_idx = 0;
4170     const DWARFDebugInfoEntry *die;
4171     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4172     {
4173         dw_tag_t tag = die->Tag();
4174         switch (tag)
4175         {
4176         case DW_TAG_formal_parameter:
4177             {
4178                 DWARFDebugInfoEntry::Attributes attributes;
4179                 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4180                 if (num_attributes > 0)
4181                 {
4182                     const char *name = NULL;
4183                     Declaration decl;
4184                     dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4185                     bool is_artificial = false;
4186                     // one of None, Auto, Register, Extern, Static, PrivateExtern
4187 
4188                     clang::StorageClass storage = clang::SC_None;
4189                     uint32_t i;
4190                     for (i=0; i<num_attributes; ++i)
4191                     {
4192                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4193                         DWARFFormValue form_value;
4194                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4195                         {
4196                             switch (attr)
4197                             {
4198                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4199                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4200                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4201                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
4202                             case DW_AT_type:        param_type_die_offset = form_value.Reference(dwarf_cu); break;
4203                             case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
4204                             case DW_AT_location:
4205     //                          if (form_value.BlockData())
4206     //                          {
4207     //                              const DataExtractor& debug_info_data = debug_info();
4208     //                              uint32_t block_length = form_value.Unsigned();
4209     //                              DataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4210     //                          }
4211     //                          else
4212     //                          {
4213     //                          }
4214     //                          break;
4215                             case DW_AT_const_value:
4216                             case DW_AT_default_value:
4217                             case DW_AT_description:
4218                             case DW_AT_endianity:
4219                             case DW_AT_is_optional:
4220                             case DW_AT_segment:
4221                             case DW_AT_variable_parameter:
4222                             default:
4223                             case DW_AT_abstract_origin:
4224                             case DW_AT_sibling:
4225                                 break;
4226                             }
4227                         }
4228                     }
4229 
4230                     bool skip = false;
4231                     if (skip_artificial)
4232                     {
4233                         if (is_artificial)
4234                         {
4235                             // In order to determine if a C++ member function is
4236                             // "const" we have to look at the const-ness of "this"...
4237                             // Ugly, but that
4238                             if (arg_idx == 0)
4239                             {
4240                                 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4241                                 {
4242                                     // Often times compilers omit the "this" name for the
4243                                     // specification DIEs, so we can't rely upon the name
4244                                     // being in the formal parameter DIE...
4245                                     if (name == NULL || ::strcmp(name, "this")==0)
4246                                     {
4247                                         Type *this_type = ResolveTypeUID (param_type_die_offset);
4248                                         if (this_type)
4249                                         {
4250                                             uint32_t encoding_mask = this_type->GetEncodingMask();
4251                                             if (encoding_mask & Type::eEncodingIsPointerUID)
4252                                             {
4253                                                 is_static = false;
4254 
4255                                                 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4256                                                     type_quals |= clang::Qualifiers::Const;
4257                                                 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4258                                                     type_quals |= clang::Qualifiers::Volatile;
4259                                             }
4260                                         }
4261                                     }
4262                                 }
4263                             }
4264                             skip = true;
4265                         }
4266                         else
4267                         {
4268 
4269                             // HACK: Objective C formal parameters "self" and "_cmd"
4270                             // are not marked as artificial in the DWARF...
4271                             CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4272                             if (comp_unit)
4273                             {
4274                                 switch (comp_unit->GetLanguage())
4275                                 {
4276                                     case eLanguageTypeObjC:
4277                                     case eLanguageTypeObjC_plus_plus:
4278                                         if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4279                                             skip = true;
4280                                         break;
4281                                     default:
4282                                         break;
4283                                 }
4284                             }
4285                         }
4286                     }
4287 
4288                     if (!skip)
4289                     {
4290                         Type *type = ResolveTypeUID(param_type_die_offset);
4291                         if (type)
4292                         {
4293                             function_param_types.push_back (type->GetClangForwardType());
4294 
4295                             clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4296                                                                                                                   type->GetClangForwardType(),
4297                                                                                                                   storage);
4298                             assert(param_var_decl);
4299                             function_param_decls.push_back(param_var_decl);
4300 
4301                             GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4302                         }
4303                     }
4304                 }
4305                 arg_idx++;
4306             }
4307             break;
4308 
4309         case DW_TAG_template_type_parameter:
4310         case DW_TAG_template_value_parameter:
4311             ParseTemplateDIE (dwarf_cu, die,template_param_infos);
4312             break;
4313 
4314         default:
4315             break;
4316         }
4317     }
4318     return arg_idx;
4319 }
4320 
4321 size_t
4322 SymbolFileDWARF::ParseChildEnumerators
4323 (
4324     const SymbolContext& sc,
4325     lldb_private::ClangASTType &clang_type,
4326     bool is_signed,
4327     uint32_t enumerator_byte_size,
4328     DWARFCompileUnit* dwarf_cu,
4329     const DWARFDebugInfoEntry *parent_die
4330 )
4331 {
4332     if (parent_die == NULL)
4333         return 0;
4334 
4335     size_t enumerators_added = 0;
4336     const DWARFDebugInfoEntry *die;
4337     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4338 
4339     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4340     {
4341         const dw_tag_t tag = die->Tag();
4342         if (tag == DW_TAG_enumerator)
4343         {
4344             DWARFDebugInfoEntry::Attributes attributes;
4345             const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4346             if (num_child_attributes > 0)
4347             {
4348                 const char *name = NULL;
4349                 bool got_value = false;
4350                 int64_t enum_value = 0;
4351                 Declaration decl;
4352 
4353                 uint32_t i;
4354                 for (i=0; i<num_child_attributes; ++i)
4355                 {
4356                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
4357                     DWARFFormValue form_value;
4358                     if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4359                     {
4360                         switch (attr)
4361                         {
4362                         case DW_AT_const_value:
4363                             got_value = true;
4364                             if (is_signed)
4365                                 enum_value = form_value.Signed();
4366                             else
4367                                 enum_value = form_value.Unsigned();
4368                             break;
4369 
4370                         case DW_AT_name:
4371                             name = form_value.AsCString(&get_debug_str_data());
4372                             break;
4373 
4374                         case DW_AT_description:
4375                         default:
4376                         case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4377                         case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4378                         case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4379                         case DW_AT_sibling:
4380                             break;
4381                         }
4382                     }
4383                 }
4384 
4385                 if (name && name[0] && got_value)
4386                 {
4387                     clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4388                                                                      decl,
4389                                                                      name,
4390                                                                      enum_value,
4391                                                                      enumerator_byte_size * 8);
4392                     ++enumerators_added;
4393                 }
4394             }
4395         }
4396     }
4397     return enumerators_added;
4398 }
4399 
4400 void
4401 SymbolFileDWARF::ParseChildArrayInfo
4402 (
4403     const SymbolContext& sc,
4404     DWARFCompileUnit* dwarf_cu,
4405     const DWARFDebugInfoEntry *parent_die,
4406     int64_t& first_index,
4407     std::vector<uint64_t>& element_orders,
4408     uint32_t& byte_stride,
4409     uint32_t& bit_stride
4410 )
4411 {
4412     if (parent_die == NULL)
4413         return;
4414 
4415     const DWARFDebugInfoEntry *die;
4416     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4417     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4418     {
4419         const dw_tag_t tag = die->Tag();
4420         switch (tag)
4421         {
4422         case DW_TAG_subrange_type:
4423             {
4424                 DWARFDebugInfoEntry::Attributes attributes;
4425                 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4426                 if (num_child_attributes > 0)
4427                 {
4428                     uint64_t num_elements = 0;
4429                     uint64_t lower_bound = 0;
4430                     uint64_t upper_bound = 0;
4431                     bool upper_bound_valid = false;
4432                     uint32_t i;
4433                     for (i=0; i<num_child_attributes; ++i)
4434                     {
4435                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4436                         DWARFFormValue form_value;
4437                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4438                         {
4439                             switch (attr)
4440                             {
4441                             case DW_AT_name:
4442                                 break;
4443 
4444                             case DW_AT_count:
4445                                 num_elements = form_value.Unsigned();
4446                                 break;
4447 
4448                             case DW_AT_bit_stride:
4449                                 bit_stride = form_value.Unsigned();
4450                                 break;
4451 
4452                             case DW_AT_byte_stride:
4453                                 byte_stride = form_value.Unsigned();
4454                                 break;
4455 
4456                             case DW_AT_lower_bound:
4457                                 lower_bound = form_value.Unsigned();
4458                                 break;
4459 
4460                             case DW_AT_upper_bound:
4461                                 upper_bound_valid = true;
4462                                 upper_bound = form_value.Unsigned();
4463                                 break;
4464 
4465                             default:
4466                             case DW_AT_abstract_origin:
4467                             case DW_AT_accessibility:
4468                             case DW_AT_allocated:
4469                             case DW_AT_associated:
4470                             case DW_AT_data_location:
4471                             case DW_AT_declaration:
4472                             case DW_AT_description:
4473                             case DW_AT_sibling:
4474                             case DW_AT_threads_scaled:
4475                             case DW_AT_type:
4476                             case DW_AT_visibility:
4477                                 break;
4478                             }
4479                         }
4480                     }
4481 
4482                     if (num_elements == 0)
4483                     {
4484                         if (upper_bound_valid && upper_bound >= lower_bound)
4485                             num_elements = upper_bound - lower_bound + 1;
4486                     }
4487 
4488                     element_orders.push_back (num_elements);
4489                 }
4490             }
4491             break;
4492         }
4493     }
4494 }
4495 
4496 TypeSP
4497 SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4498 {
4499     TypeSP type_sp;
4500     if (die != NULL)
4501     {
4502         assert(dwarf_cu != NULL);
4503         Type *type_ptr = m_die_to_type.lookup (die);
4504         if (type_ptr == NULL)
4505         {
4506             CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4507             assert (lldb_cu);
4508             SymbolContext sc(lldb_cu);
4509             type_sp = ParseType(sc, dwarf_cu, die, NULL);
4510         }
4511         else if (type_ptr != DIE_IS_BEING_PARSED)
4512         {
4513             // Grab the existing type from the master types lists
4514             type_sp = type_ptr->shared_from_this();
4515         }
4516 
4517     }
4518     return type_sp;
4519 }
4520 
4521 clang::DeclContext *
4522 SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4523 {
4524     if (die_offset != DW_INVALID_OFFSET)
4525     {
4526         DWARFCompileUnitSP cu_sp;
4527         const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4528         return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4529     }
4530     return NULL;
4531 }
4532 
4533 clang::DeclContext *
4534 SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4535 {
4536     if (die_offset != DW_INVALID_OFFSET)
4537     {
4538         DWARFDebugInfo* debug_info = DebugInfo();
4539         if (debug_info)
4540         {
4541             DWARFCompileUnitSP cu_sp;
4542             const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4543             if (die)
4544                 return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4545         }
4546     }
4547     return NULL;
4548 }
4549 
4550 clang::NamespaceDecl *
4551 SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4552 {
4553     if (die && die->Tag() == DW_TAG_namespace)
4554     {
4555         // See if we already parsed this namespace DIE and associated it with a
4556         // uniqued namespace declaration
4557         clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4558         if (namespace_decl)
4559             return namespace_decl;
4560         else
4561         {
4562             const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4563             clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4564             namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4565             Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4566             if (log)
4567             {
4568                 if (namespace_name)
4569                 {
4570                     GetObjectFile()->GetModule()->LogMessage (log,
4571                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4572                                                               GetClangASTContext().getASTContext(),
4573                                                               MakeUserID(die->GetOffset()),
4574                                                               namespace_name,
4575                                                               namespace_decl,
4576                                                               namespace_decl->getOriginalNamespace());
4577                 }
4578                 else
4579                 {
4580                     GetObjectFile()->GetModule()->LogMessage (log,
4581                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4582                                                               GetClangASTContext().getASTContext(),
4583                                                               MakeUserID(die->GetOffset()),
4584                                                               namespace_decl,
4585                                                               namespace_decl->getOriginalNamespace());
4586                 }
4587             }
4588 
4589             if (namespace_decl)
4590                 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4591             return namespace_decl;
4592         }
4593     }
4594     return NULL;
4595 }
4596 
4597 clang::DeclContext *
4598 SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4599 {
4600     clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4601     if (clang_decl_ctx)
4602         return clang_decl_ctx;
4603     // If this DIE has a specification, or an abstract origin, then trace to those.
4604 
4605     dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4606     if (die_offset != DW_INVALID_OFFSET)
4607         return GetClangDeclContextForDIEOffset (sc, die_offset);
4608 
4609     die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4610     if (die_offset != DW_INVALID_OFFSET)
4611         return GetClangDeclContextForDIEOffset (sc, die_offset);
4612 
4613     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4614     if (log)
4615         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));
4616     // This is the DIE we want.  Parse it, then query our map.
4617     bool assert_not_being_parsed = true;
4618     ResolveTypeUID (cu, die, assert_not_being_parsed);
4619 
4620     clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4621 
4622     return clang_decl_ctx;
4623 }
4624 
4625 clang::DeclContext *
4626 SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4627 {
4628     if (m_clang_tu_decl == NULL)
4629         m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4630 
4631     const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4632 
4633     if (decl_ctx_die_copy)
4634         *decl_ctx_die_copy = decl_ctx_die;
4635 
4636     if (decl_ctx_die)
4637     {
4638 
4639         DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4640         if (pos != m_die_to_decl_ctx.end())
4641             return pos->second;
4642 
4643         switch (decl_ctx_die->Tag())
4644         {
4645         case DW_TAG_compile_unit:
4646             return m_clang_tu_decl;
4647 
4648         case DW_TAG_namespace:
4649             return ResolveNamespaceDIE (cu, decl_ctx_die);
4650             break;
4651 
4652         case DW_TAG_structure_type:
4653         case DW_TAG_union_type:
4654         case DW_TAG_class_type:
4655             {
4656                 Type* type = ResolveType (cu, decl_ctx_die);
4657                 if (type)
4658                 {
4659                     clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4660                     if (decl_ctx)
4661                     {
4662                         LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4663                         if (decl_ctx)
4664                             return decl_ctx;
4665                     }
4666                 }
4667             }
4668             break;
4669 
4670         default:
4671             break;
4672         }
4673     }
4674     return m_clang_tu_decl;
4675 }
4676 
4677 
4678 const DWARFDebugInfoEntry *
4679 SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4680 {
4681     if (cu && die)
4682     {
4683         const DWARFDebugInfoEntry * const decl_die = die;
4684 
4685         while (die != NULL)
4686         {
4687             // If this is the original DIE that we are searching for a declaration
4688             // for, then don't look in the cache as we don't want our own decl
4689             // context to be our decl context...
4690             if (decl_die != die)
4691             {
4692                 switch (die->Tag())
4693                 {
4694                     case DW_TAG_compile_unit:
4695                     case DW_TAG_namespace:
4696                     case DW_TAG_structure_type:
4697                     case DW_TAG_union_type:
4698                     case DW_TAG_class_type:
4699                         return die;
4700 
4701                     default:
4702                         break;
4703                 }
4704             }
4705 
4706             dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4707             if (die_offset != DW_INVALID_OFFSET)
4708             {
4709                 DWARFCompileUnit *spec_cu = cu;
4710                 const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4711                 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4712                 if (spec_die_decl_ctx_die)
4713                     return spec_die_decl_ctx_die;
4714             }
4715 
4716             die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4717             if (die_offset != DW_INVALID_OFFSET)
4718             {
4719                 DWARFCompileUnit *abs_cu = cu;
4720                 const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4721                 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4722                 if (abs_die_decl_ctx_die)
4723                     return abs_die_decl_ctx_die;
4724             }
4725 
4726             die = die->GetParent();
4727         }
4728     }
4729     return NULL;
4730 }
4731 
4732 
4733 Symbol *
4734 SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
4735 {
4736     Symbol *objc_class_symbol = NULL;
4737     if (m_obj_file)
4738     {
4739         Symtab *symtab = m_obj_file->GetSymtab ();
4740         if (symtab)
4741         {
4742             objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
4743                                                                         eSymbolTypeObjCClass,
4744                                                                         Symtab::eDebugNo,
4745                                                                         Symtab::eVisibilityAny);
4746         }
4747     }
4748     return objc_class_symbol;
4749 }
4750 
4751 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
4752 // then we can end up looking through all class types for a complete type and never find
4753 // the full definition. We need to know if this attribute is supported, so we determine
4754 // this here and cache th result. We also need to worry about the debug map DWARF file
4755 // if we are doing darwin DWARF in .o file debugging.
4756 bool
4757 SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
4758 {
4759     if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
4760     {
4761         m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
4762         if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
4763             m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4764         else
4765         {
4766             DWARFDebugInfo* debug_info = DebugInfo();
4767             const uint32_t num_compile_units = GetNumCompileUnits();
4768             for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
4769             {
4770                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
4771                 if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
4772                 {
4773                     m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4774                     break;
4775                 }
4776             }
4777         }
4778         if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
4779             return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
4780     }
4781     return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
4782 }
4783 
4784 // This function can be used when a DIE is found that is a forward declaration
4785 // DIE and we want to try and find a type that has the complete definition.
4786 TypeSP
4787 SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
4788                                                        const ConstString &type_name,
4789                                                        bool must_be_implementation)
4790 {
4791 
4792     TypeSP type_sp;
4793 
4794     if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
4795         return type_sp;
4796 
4797     DIEArray die_offsets;
4798 
4799     if (m_using_apple_tables)
4800     {
4801         if (m_apple_types_ap.get())
4802         {
4803             const char *name_cstr = type_name.GetCString();
4804             m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
4805         }
4806     }
4807     else
4808     {
4809         if (!m_indexed)
4810             Index ();
4811 
4812         m_type_index.Find (type_name, die_offsets);
4813     }
4814 
4815     const size_t num_matches = die_offsets.size();
4816 
4817     DWARFCompileUnit* type_cu = NULL;
4818     const DWARFDebugInfoEntry* type_die = NULL;
4819     if (num_matches)
4820     {
4821         DWARFDebugInfo* debug_info = DebugInfo();
4822         for (size_t i=0; i<num_matches; ++i)
4823         {
4824             const dw_offset_t die_offset = die_offsets[i];
4825             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4826 
4827             if (type_die)
4828             {
4829                 bool try_resolving_type = false;
4830 
4831                 // Don't try and resolve the DIE we are looking for with the DIE itself!
4832                 if (type_die != die)
4833                 {
4834                     switch (type_die->Tag())
4835                     {
4836                         case DW_TAG_class_type:
4837                         case DW_TAG_structure_type:
4838                             try_resolving_type = true;
4839                             break;
4840                         default:
4841                             break;
4842                     }
4843                 }
4844 
4845                 if (try_resolving_type)
4846                 {
4847 					if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
4848 	                    try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
4849 
4850                     if (try_resolving_type)
4851                     {
4852                         Type *resolved_type = ResolveType (type_cu, type_die, false);
4853                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4854                         {
4855                             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",
4856                                           MakeUserID(die->GetOffset()),
4857                                           MakeUserID(dwarf_cu->GetOffset()),
4858                                           m_obj_file->GetFileSpec().GetFilename().AsCString(),
4859                                           MakeUserID(type_die->GetOffset()),
4860                                           MakeUserID(type_cu->GetOffset()));
4861 
4862                             if (die)
4863                                 m_die_to_type[die] = resolved_type;
4864                             type_sp = resolved_type->shared_from_this();
4865                             break;
4866                         }
4867                     }
4868                 }
4869             }
4870             else
4871             {
4872                 if (m_using_apple_tables)
4873                 {
4874                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4875                                                                die_offset, type_name.GetCString());
4876                 }
4877             }
4878 
4879         }
4880     }
4881     return type_sp;
4882 }
4883 
4884 
4885 //----------------------------------------------------------------------
4886 // This function helps to ensure that the declaration contexts match for
4887 // two different DIEs. Often times debug information will refer to a
4888 // forward declaration of a type (the equivalent of "struct my_struct;".
4889 // There will often be a declaration of that type elsewhere that has the
4890 // full definition. When we go looking for the full type "my_struct", we
4891 // will find one or more matches in the accelerator tables and we will
4892 // then need to make sure the type was in the same declaration context
4893 // as the original DIE. This function can efficiently compare two DIEs
4894 // and will return true when the declaration context matches, and false
4895 // when they don't.
4896 //----------------------------------------------------------------------
4897 bool
4898 SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
4899                                        DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
4900 {
4901     if (die1 == die2)
4902         return true;
4903 
4904 #if defined (LLDB_CONFIGURATION_DEBUG)
4905     // You can't and shouldn't call this function with a compile unit from
4906     // two different SymbolFileDWARF instances.
4907     assert (DebugInfo()->ContainsCompileUnit (cu1));
4908     assert (DebugInfo()->ContainsCompileUnit (cu2));
4909 #endif
4910 
4911     DWARFDIECollection decl_ctx_1;
4912     DWARFDIECollection decl_ctx_2;
4913     //The declaration DIE stack is a stack of the declaration context
4914     // DIEs all the way back to the compile unit. If a type "T" is
4915     // declared inside a class "B", and class "B" is declared inside
4916     // a class "A" and class "A" is in a namespace "lldb", and the
4917     // namespace is in a compile unit, there will be a stack of DIEs:
4918     //
4919     //   [0] DW_TAG_class_type for "B"
4920     //   [1] DW_TAG_class_type for "A"
4921     //   [2] DW_TAG_namespace  for "lldb"
4922     //   [3] DW_TAG_compile_unit for the source file.
4923     //
4924     // We grab both contexts and make sure that everything matches
4925     // all the way back to the compiler unit.
4926 
4927     // First lets grab the decl contexts for both DIEs
4928     die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
4929     die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
4930     // Make sure the context arrays have the same size, otherwise
4931     // we are done
4932     const size_t count1 = decl_ctx_1.Size();
4933     const size_t count2 = decl_ctx_2.Size();
4934     if (count1 != count2)
4935         return false;
4936 
4937     // Make sure the DW_TAG values match all the way back up the the
4938     // compile unit. If they don't, then we are done.
4939     const DWARFDebugInfoEntry *decl_ctx_die1;
4940     const DWARFDebugInfoEntry *decl_ctx_die2;
4941     size_t i;
4942     for (i=0; i<count1; i++)
4943     {
4944         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4945         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4946         if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
4947             return false;
4948     }
4949 #if defined LLDB_CONFIGURATION_DEBUG
4950 
4951     // Make sure the top item in the decl context die array is always
4952     // DW_TAG_compile_unit. If it isn't then something went wrong in
4953     // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
4954     assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
4955 
4956 #endif
4957     // Always skip the compile unit when comparing by only iterating up to
4958     // "count - 1". Here we compare the names as we go.
4959     for (i=0; i<count1 - 1; i++)
4960     {
4961         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4962         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4963         const char *name1 = decl_ctx_die1->GetName(this, cu1);
4964         const char *name2 = decl_ctx_die2->GetName(this, cu2);
4965         // If the string was from a DW_FORM_strp, then the pointer will often
4966         // be the same!
4967         if (name1 == name2)
4968             continue;
4969 
4970         // Name pointers are not equal, so only compare the strings
4971         // if both are not NULL.
4972         if (name1 && name2)
4973         {
4974             // If the strings don't compare, we are done...
4975             if (strcmp(name1, name2) != 0)
4976                 return false;
4977         }
4978         else
4979         {
4980             // One name was NULL while the other wasn't
4981             return false;
4982         }
4983     }
4984     // We made it through all of the checks and the declaration contexts
4985     // are equal.
4986     return true;
4987 }
4988 
4989 // This function can be used when a DIE is found that is a forward declaration
4990 // DIE and we want to try and find a type that has the complete definition.
4991 // "cu" and "die" must be from this SymbolFileDWARF
4992 TypeSP
4993 SymbolFileDWARF::FindDefinitionTypeForDIE (DWARFCompileUnit* cu,
4994                                            const DWARFDebugInfoEntry *die,
4995                                            const ConstString &type_name)
4996 {
4997     TypeSP type_sp;
4998 
4999 #if defined (LLDB_CONFIGURATION_DEBUG)
5000     // You can't and shouldn't call this function with a compile unit from
5001     // another SymbolFileDWARF instance.
5002     assert (DebugInfo()->ContainsCompileUnit (cu));
5003 #endif
5004 
5005     if (cu == NULL || die == NULL || !type_name)
5006         return type_sp;
5007 
5008     std::string qualified_name;
5009 
5010     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5011     if (log)
5012     {
5013         die->GetQualifiedName(this, cu, qualified_name);
5014         GetObjectFile()->GetModule()->LogMessage (log,
5015                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x (%s), name='%s')",
5016                                                   die->GetOffset(),
5017                                                   qualified_name.c_str(),
5018                                                   type_name.GetCString());
5019     }
5020 
5021     DIEArray die_offsets;
5022 
5023     if (m_using_apple_tables)
5024     {
5025         if (m_apple_types_ap.get())
5026         {
5027             const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5028             const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5029             if (has_tag && has_qualified_name_hash)
5030             {
5031                 if (qualified_name.empty())
5032                     die->GetQualifiedName(this, cu, qualified_name);
5033 
5034                 const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name.c_str());
5035                 if (log)
5036                     GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5037                 m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), die->Tag(), qualified_name_hash, die_offsets);
5038             }
5039             else if (has_tag > 1)
5040             {
5041                 if (log)
5042                     GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5043                 m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), die->Tag(), die_offsets);
5044             }
5045             else
5046             {
5047                 m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5048             }
5049         }
5050     }
5051     else
5052     {
5053         if (!m_indexed)
5054             Index ();
5055 
5056         m_type_index.Find (type_name, die_offsets);
5057     }
5058 
5059     const size_t num_matches = die_offsets.size();
5060 
5061     const dw_tag_t die_tag = die->Tag();
5062 
5063     DWARFCompileUnit* type_cu = NULL;
5064     const DWARFDebugInfoEntry* type_die = NULL;
5065     if (num_matches)
5066     {
5067         DWARFDebugInfo* debug_info = DebugInfo();
5068         for (size_t i=0; i<num_matches; ++i)
5069         {
5070             const dw_offset_t die_offset = die_offsets[i];
5071             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5072 
5073             if (type_die)
5074             {
5075                 bool try_resolving_type = false;
5076 
5077                 // Don't try and resolve the DIE we are looking for with the DIE itself!
5078                 if (type_die != die)
5079                 {
5080                     const dw_tag_t type_die_tag = type_die->Tag();
5081                     // Make sure the tags match
5082                     if (type_die_tag == die_tag)
5083                     {
5084                         // The tags match, lets try resolving this type
5085                         try_resolving_type = true;
5086                     }
5087                     else
5088                     {
5089                         // The tags don't match, but we need to watch our for a
5090                         // forward declaration for a struct and ("struct foo")
5091                         // ends up being a class ("class foo { ... };") or
5092                         // vice versa.
5093                         switch (type_die_tag)
5094                         {
5095                         case DW_TAG_class_type:
5096                             // We had a "class foo", see if we ended up with a "struct foo { ... };"
5097                             try_resolving_type = (die_tag == DW_TAG_structure_type);
5098                             break;
5099                         case DW_TAG_structure_type:
5100                             // We had a "struct foo", see if we ended up with a "class foo { ... };"
5101                             try_resolving_type = (die_tag == DW_TAG_class_type);
5102                             break;
5103                         default:
5104                             // Tags don't match, don't event try to resolve
5105                             // using this type whose name matches....
5106                             break;
5107                         }
5108                     }
5109                 }
5110 
5111                 if (try_resolving_type)
5112                 {
5113                     if (log)
5114                     {
5115                         std::string qualified_name;
5116                         type_die->GetQualifiedName(this, cu, qualified_name);
5117                         GetObjectFile()->GetModule()->LogMessage (log,
5118                                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') trying die=0x%8.8x (%s)",
5119                                                                   die->GetOffset(),
5120                                                                   type_name.GetCString(),
5121                                                                   type_die->GetOffset(),
5122                                                                   qualified_name.c_str());
5123                     }
5124 
5125                     // Make sure the decl contexts match all the way up
5126                     if (DIEDeclContextsMatch(cu, die, type_cu, type_die))
5127                     {
5128                         Type *resolved_type = ResolveType (type_cu, type_die, false);
5129                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5130                         {
5131                             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",
5132                                           MakeUserID(die->GetOffset()),
5133                                           MakeUserID(dwarf_cu->GetOffset()),
5134                                           m_obj_file->GetFileSpec().GetFilename().AsCString(),
5135                                           MakeUserID(type_die->GetOffset()),
5136                                           MakeUserID(type_cu->GetOffset()));
5137 
5138                             m_die_to_type[die] = resolved_type;
5139                             type_sp = resolved_type->shared_from_this();
5140                             break;
5141                         }
5142                     }
5143                 }
5144                 else
5145                 {
5146                     if (log)
5147                     {
5148                         std::string qualified_name;
5149                         type_die->GetQualifiedName(this, cu, qualified_name);
5150                         GetObjectFile()->GetModule()->LogMessage (log,
5151                                                                   "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') ignoring die=0x%8.8x (%s)",
5152                                                                   die->GetOffset(),
5153                                                                   type_name.GetCString(),
5154                                                                   type_die->GetOffset(),
5155                                                                   qualified_name.c_str());
5156                     }
5157                 }
5158             }
5159             else
5160             {
5161                 if (m_using_apple_tables)
5162                 {
5163                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5164                                                                                die_offset, type_name.GetCString());
5165                 }
5166             }
5167 
5168         }
5169     }
5170     return type_sp;
5171 }
5172 
5173 TypeSP
5174 SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5175 {
5176     TypeSP type_sp;
5177 
5178     const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5179     if (dwarf_decl_ctx_count > 0)
5180     {
5181         const ConstString type_name(dwarf_decl_ctx[0].name);
5182         const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5183 
5184         if (type_name)
5185         {
5186             Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5187             if (log)
5188             {
5189                 GetObjectFile()->GetModule()->LogMessage (log,
5190                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5191                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5192                                                           dwarf_decl_ctx.GetQualifiedName());
5193             }
5194 
5195             DIEArray die_offsets;
5196 
5197             if (m_using_apple_tables)
5198             {
5199                 if (m_apple_types_ap.get())
5200                 {
5201                     const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5202                     const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5203                     if (has_tag && has_qualified_name_hash)
5204                     {
5205                         const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5206                         const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5207                         if (log)
5208                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5209                         m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5210                     }
5211                     else if (has_tag)
5212                     {
5213                         if (log)
5214                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5215                         m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5216                     }
5217                     else
5218                     {
5219                         m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5220                     }
5221                 }
5222             }
5223             else
5224             {
5225                 if (!m_indexed)
5226                     Index ();
5227 
5228                 m_type_index.Find (type_name, die_offsets);
5229             }
5230 
5231             const size_t num_matches = die_offsets.size();
5232 
5233 
5234             DWARFCompileUnit* type_cu = NULL;
5235             const DWARFDebugInfoEntry* type_die = NULL;
5236             if (num_matches)
5237             {
5238                 DWARFDebugInfo* debug_info = DebugInfo();
5239                 for (size_t i=0; i<num_matches; ++i)
5240                 {
5241                     const dw_offset_t die_offset = die_offsets[i];
5242                     type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5243 
5244                     if (type_die)
5245                     {
5246                         bool try_resolving_type = false;
5247 
5248                         // Don't try and resolve the DIE we are looking for with the DIE itself!
5249                         const dw_tag_t type_tag = type_die->Tag();
5250                         // Make sure the tags match
5251                         if (type_tag == tag)
5252                         {
5253                             // The tags match, lets try resolving this type
5254                             try_resolving_type = true;
5255                         }
5256                         else
5257                         {
5258                             // The tags don't match, but we need to watch our for a
5259                             // forward declaration for a struct and ("struct foo")
5260                             // ends up being a class ("class foo { ... };") or
5261                             // vice versa.
5262                             switch (type_tag)
5263                             {
5264                                 case DW_TAG_class_type:
5265                                     // We had a "class foo", see if we ended up with a "struct foo { ... };"
5266                                     try_resolving_type = (tag == DW_TAG_structure_type);
5267                                     break;
5268                                 case DW_TAG_structure_type:
5269                                     // We had a "struct foo", see if we ended up with a "class foo { ... };"
5270                                     try_resolving_type = (tag == DW_TAG_class_type);
5271                                     break;
5272                                 default:
5273                                     // Tags don't match, don't event try to resolve
5274                                     // using this type whose name matches....
5275                                     break;
5276                             }
5277                         }
5278 
5279                         if (try_resolving_type)
5280                         {
5281                             DWARFDeclContext type_dwarf_decl_ctx;
5282                             type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5283 
5284                             if (log)
5285                             {
5286                                 GetObjectFile()->GetModule()->LogMessage (log,
5287                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5288                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5289                                                                           dwarf_decl_ctx.GetQualifiedName(),
5290                                                                           type_die->GetOffset(),
5291                                                                           type_dwarf_decl_ctx.GetQualifiedName());
5292                             }
5293 
5294                             // Make sure the decl contexts match all the way up
5295                             if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5296                             {
5297                                 Type *resolved_type = ResolveType (type_cu, type_die, false);
5298                                 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5299                                 {
5300                                     type_sp = resolved_type->shared_from_this();
5301                                     break;
5302                                 }
5303                             }
5304                         }
5305                         else
5306                         {
5307                             if (log)
5308                             {
5309                                 std::string qualified_name;
5310                                 type_die->GetQualifiedName(this, type_cu, qualified_name);
5311                                 GetObjectFile()->GetModule()->LogMessage (log,
5312                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5313                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5314                                                                           dwarf_decl_ctx.GetQualifiedName(),
5315                                                                           type_die->GetOffset(),
5316                                                                           qualified_name.c_str());
5317                             }
5318                         }
5319                     }
5320                     else
5321                     {
5322                         if (m_using_apple_tables)
5323                         {
5324                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5325                                                                                        die_offset, type_name.GetCString());
5326                         }
5327                     }
5328 
5329                 }
5330             }
5331         }
5332     }
5333     return type_sp;
5334 }
5335 
5336 bool
5337 SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5338                                              Type *class_type,
5339                                              DWARFCompileUnit* src_cu,
5340                                              const DWARFDebugInfoEntry *src_class_die,
5341                                              DWARFCompileUnit* dst_cu,
5342                                              const DWARFDebugInfoEntry *dst_class_die,
5343                                              llvm::SmallVectorImpl <const DWARFDebugInfoEntry *> &failures)
5344 {
5345     if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5346         return false;
5347     if (src_class_die->Tag() != dst_class_die->Tag())
5348         return false;
5349 
5350     // We need to complete the class type so we can get all of the method types
5351     // parsed so we can then unique those types to their equivalent counterparts
5352     // in "dst_cu" and "dst_class_die"
5353     class_type->GetClangFullType();
5354 
5355     const DWARFDebugInfoEntry *src_die;
5356     const DWARFDebugInfoEntry *dst_die;
5357     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5358     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5359     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5360     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5361     for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5362     {
5363         if (src_die->Tag() == DW_TAG_subprogram)
5364         {
5365             // Make sure this is a declaration and not a concrete instance by looking
5366             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5367             // are placed inside the class definitions and shouldn't be included in
5368             // the list of things are are tracking here.
5369             if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5370             {
5371                 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5372                 if (src_name)
5373                 {
5374                     ConstString src_const_name(src_name);
5375                     if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5376                         src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5377                     else
5378                         src_name_to_die.Append(src_const_name.GetCString(), src_die);
5379                 }
5380             }
5381         }
5382     }
5383     for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5384     {
5385         if (dst_die->Tag() == DW_TAG_subprogram)
5386         {
5387             // Make sure this is a declaration and not a concrete instance by looking
5388             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5389             // are placed inside the class definitions and shouldn't be included in
5390             // the list of things are are tracking here.
5391             if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5392             {
5393                 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5394                 if (dst_name)
5395                 {
5396                     ConstString dst_const_name(dst_name);
5397                     if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5398                         dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5399                     else
5400                         dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5401                 }
5402             }
5403         }
5404     }
5405     const uint32_t src_size = src_name_to_die.GetSize ();
5406     const uint32_t dst_size = dst_name_to_die.GetSize ();
5407     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5408 
5409     // Is everything kosher so we can go through the members at top speed?
5410     bool fast_path = true;
5411 
5412     if (src_size != dst_size)
5413     {
5414         if (src_size != 0 && dst_size != 0)
5415         {
5416             if (log)
5417                 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)",
5418                             src_class_die->GetOffset(),
5419                             dst_class_die->GetOffset(),
5420                             src_size,
5421                             dst_size);
5422         }
5423 
5424         fast_path = false;
5425     }
5426 
5427     uint32_t idx;
5428 
5429     if (fast_path)
5430     {
5431         for (idx = 0; idx < src_size; ++idx)
5432         {
5433             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5434             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5435 
5436             if (src_die->Tag() != dst_die->Tag())
5437             {
5438                 if (log)
5439                     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)",
5440                                 src_class_die->GetOffset(),
5441                                 dst_class_die->GetOffset(),
5442                                 src_die->GetOffset(),
5443                                 DW_TAG_value_to_name(src_die->Tag()),
5444                                 dst_die->GetOffset(),
5445                                 DW_TAG_value_to_name(src_die->Tag()));
5446                 fast_path = false;
5447             }
5448 
5449             const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5450             const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5451 
5452             // Make sure the names match
5453             if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5454                 continue;
5455 
5456             if (log)
5457                 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)",
5458                             src_class_die->GetOffset(),
5459                             dst_class_die->GetOffset(),
5460                             src_die->GetOffset(),
5461                             src_name,
5462                             dst_die->GetOffset(),
5463                             dst_name);
5464 
5465             fast_path = false;
5466         }
5467     }
5468 
5469     // Now do the work of linking the DeclContexts and Types.
5470     if (fast_path)
5471     {
5472         // We can do this quickly.  Just run across the tables index-for-index since
5473         // we know each node has matching names and tags.
5474         for (idx = 0; idx < src_size; ++idx)
5475         {
5476             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5477             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5478 
5479             clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5480             if (src_decl_ctx)
5481             {
5482                 if (log)
5483                     log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5484                 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5485             }
5486             else
5487             {
5488                 if (log)
5489                     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());
5490             }
5491 
5492             Type *src_child_type = m_die_to_type[src_die];
5493             if (src_child_type)
5494             {
5495                 if (log)
5496                     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());
5497                 m_die_to_type[dst_die] = src_child_type;
5498             }
5499             else
5500             {
5501                 if (log)
5502                     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());
5503             }
5504         }
5505     }
5506     else
5507     {
5508         // We must do this slowly.  For each member of the destination, look
5509         // up a member in the source with the same name, check its tag, and
5510         // unique them if everything matches up.  Report failures.
5511 
5512         if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5513         {
5514             src_name_to_die.Sort();
5515 
5516             for (idx = 0; idx < dst_size; ++idx)
5517             {
5518                 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5519                 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5520                 src_die = src_name_to_die.Find(dst_name, NULL);
5521 
5522                 if (src_die && (src_die->Tag() == dst_die->Tag()))
5523                 {
5524                     clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5525                     if (src_decl_ctx)
5526                     {
5527                         if (log)
5528                             log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5529                         LinkDeclContextToDIE (src_decl_ctx, dst_die);
5530                     }
5531                     else
5532                     {
5533                         if (log)
5534                             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());
5535                     }
5536 
5537                     Type *src_child_type = m_die_to_type[src_die];
5538                     if (src_child_type)
5539                     {
5540                         if (log)
5541                             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());
5542                         m_die_to_type[dst_die] = src_child_type;
5543                     }
5544                     else
5545                     {
5546                         if (log)
5547                             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());
5548                     }
5549                 }
5550                 else
5551                 {
5552                     if (log)
5553                         log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5554 
5555                     failures.push_back(dst_die);
5556                 }
5557             }
5558         }
5559     }
5560 
5561     const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5562     const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5563 
5564     UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5565 
5566     if (src_size_artificial && dst_size_artificial)
5567     {
5568         dst_name_to_die_artificial.Sort();
5569 
5570         for (idx = 0; idx < src_size_artificial; ++idx)
5571         {
5572             const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5573             src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5574             dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5575 
5576             if (dst_die)
5577             {
5578                 // Both classes have the artificial types, link them
5579                 clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5580                 if (src_decl_ctx)
5581                 {
5582                     if (log)
5583                         log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5584                     LinkDeclContextToDIE (src_decl_ctx, dst_die);
5585                 }
5586                 else
5587                 {
5588                     if (log)
5589                         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());
5590                 }
5591 
5592                 Type *src_child_type = m_die_to_type[src_die];
5593                 if (src_child_type)
5594                 {
5595                     if (log)
5596                         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());
5597                     m_die_to_type[dst_die] = src_child_type;
5598                 }
5599                 else
5600                 {
5601                     if (log)
5602                         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());
5603                 }
5604             }
5605         }
5606     }
5607 
5608     if (dst_size_artificial)
5609     {
5610         for (idx = 0; idx < dst_size_artificial; ++idx)
5611         {
5612             const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5613             dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5614             if (log)
5615                 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5616 
5617             failures.push_back(dst_die);
5618         }
5619     }
5620 
5621     return (failures.size() != 0);
5622 }
5623 
5624 TypeSP
5625 SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5626 {
5627     TypeSP type_sp;
5628 
5629     if (type_is_new_ptr)
5630         *type_is_new_ptr = false;
5631 
5632 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5633     static DIEStack g_die_stack;
5634     DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5635 #endif
5636 
5637     AccessType accessibility = eAccessNone;
5638     if (die != NULL)
5639     {
5640         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5641         if (log)
5642         {
5643             const DWARFDebugInfoEntry *context_die;
5644             clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5645 
5646             GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5647                         die->GetOffset(),
5648                         context,
5649                         context_die->GetOffset(),
5650                         DW_TAG_value_to_name(die->Tag()),
5651                         die->GetName(this, dwarf_cu));
5652 
5653 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5654             scoped_die_logger.Push (dwarf_cu, die);
5655             g_die_stack.LogDIEs(log, this);
5656 #endif
5657         }
5658 //
5659 //        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5660 //        if (log && dwarf_cu)
5661 //        {
5662 //            StreamString s;
5663 //            die->DumpLocation (this, dwarf_cu, s);
5664 //            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5665 //
5666 //        }
5667 
5668         Type *type_ptr = m_die_to_type.lookup (die);
5669         TypeList* type_list = GetTypeList();
5670         if (type_ptr == NULL)
5671         {
5672             ClangASTContext &ast = GetClangASTContext();
5673             if (type_is_new_ptr)
5674                 *type_is_new_ptr = true;
5675 
5676             const dw_tag_t tag = die->Tag();
5677 
5678             bool is_forward_declaration = false;
5679             DWARFDebugInfoEntry::Attributes attributes;
5680             const char *type_name_cstr = NULL;
5681             ConstString type_name_const_str;
5682             Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5683             uint64_t byte_size = 0;
5684             Declaration decl;
5685 
5686             Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5687             ClangASTType clang_type;
5688 
5689             dw_attr_t attr;
5690 
5691             switch (tag)
5692             {
5693             case DW_TAG_base_type:
5694             case DW_TAG_pointer_type:
5695             case DW_TAG_reference_type:
5696             case DW_TAG_rvalue_reference_type:
5697             case DW_TAG_typedef:
5698             case DW_TAG_const_type:
5699             case DW_TAG_restrict_type:
5700             case DW_TAG_volatile_type:
5701             case DW_TAG_unspecified_type:
5702                 {
5703                     // Set a bit that lets us know that we are currently parsing this
5704                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5705 
5706                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5707                     uint32_t encoding = 0;
5708                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5709 
5710                     if (num_attributes > 0)
5711                     {
5712                         uint32_t i;
5713                         for (i=0; i<num_attributes; ++i)
5714                         {
5715                             attr = attributes.AttributeAtIndex(i);
5716                             DWARFFormValue form_value;
5717                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5718                             {
5719                                 switch (attr)
5720                                 {
5721                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5722                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5723                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5724                                 case DW_AT_name:
5725 
5726                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5727                                     // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5728                                     // include the "&"...
5729                                     if (tag == DW_TAG_reference_type)
5730                                     {
5731                                         if (strchr (type_name_cstr, '&') == NULL)
5732                                             type_name_cstr = NULL;
5733                                     }
5734                                     if (type_name_cstr)
5735                                         type_name_const_str.SetCString(type_name_cstr);
5736                                     break;
5737                                 case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5738                                 case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5739                                 case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
5740                                 default:
5741                                 case DW_AT_sibling:
5742                                     break;
5743                                 }
5744                             }
5745                         }
5746                     }
5747 
5748                     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);
5749 
5750                     switch (tag)
5751                     {
5752                     default:
5753                         break;
5754 
5755                     case DW_TAG_unspecified_type:
5756                         if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5757                             strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5758                         {
5759                             resolve_state = Type::eResolveStateFull;
5760                             clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5761                             break;
5762                         }
5763                         // Fall through to base type below in case we can handle the type there...
5764 
5765                     case DW_TAG_base_type:
5766                         resolve_state = Type::eResolveStateFull;
5767                         clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5768                                                                                    encoding,
5769                                                                                    byte_size * 8);
5770                         break;
5771 
5772                     case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5773                     case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5774                     case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5775                     case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5776                     case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5777                     case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5778                     case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5779                     }
5780 
5781                     if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5782                     {
5783                         bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5784 
5785                         if (translation_unit_is_objc)
5786                         {
5787                             if (type_name_cstr != NULL)
5788                             {
5789                                 static ConstString g_objc_type_name_id("id");
5790                                 static ConstString g_objc_type_name_Class("Class");
5791                                 static ConstString g_objc_type_name_selector("SEL");
5792 
5793                                 if (type_name_const_str == g_objc_type_name_id)
5794                                 {
5795                                     if (log)
5796                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5797                                                                                   die->GetOffset(),
5798                                                                                   DW_TAG_value_to_name(die->Tag()),
5799                                                                                   die->GetName(this, dwarf_cu));
5800                                     clang_type = ast.GetBasicType(eBasicTypeObjCID);
5801                                     encoding_data_type = Type::eEncodingIsUID;
5802                                     encoding_uid = LLDB_INVALID_UID;
5803                                     resolve_state = Type::eResolveStateFull;
5804 
5805                                 }
5806                                 else if (type_name_const_str == g_objc_type_name_Class)
5807                                 {
5808                                     if (log)
5809                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5810                                                                                   die->GetOffset(),
5811                                                                                   DW_TAG_value_to_name(die->Tag()),
5812                                                                                   die->GetName(this, dwarf_cu));
5813                                     clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5814                                     encoding_data_type = Type::eEncodingIsUID;
5815                                     encoding_uid = LLDB_INVALID_UID;
5816                                     resolve_state = Type::eResolveStateFull;
5817                                 }
5818                                 else if (type_name_const_str == g_objc_type_name_selector)
5819                                 {
5820                                     if (log)
5821                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5822                                                                                   die->GetOffset(),
5823                                                                                   DW_TAG_value_to_name(die->Tag()),
5824                                                                                   die->GetName(this, dwarf_cu));
5825                                     clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5826                                     encoding_data_type = Type::eEncodingIsUID;
5827                                     encoding_uid = LLDB_INVALID_UID;
5828                                     resolve_state = Type::eResolveStateFull;
5829                                 }
5830                             }
5831                             else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5832                             {
5833                                 // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5834 
5835                                 DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5836 
5837                                 if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5838                                 {
5839                                     if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5840                                     {
5841                                         if (!strcmp(struct_name, "objc_object"))
5842                                         {
5843                                             if (log)
5844                                                 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5845                                                                                           die->GetOffset(),
5846                                                                                           DW_TAG_value_to_name(die->Tag()),
5847                                                                                           die->GetName(this, dwarf_cu));
5848                                             clang_type = ast.GetBasicType(eBasicTypeObjCID);
5849                                             encoding_data_type = Type::eEncodingIsUID;
5850                                             encoding_uid = LLDB_INVALID_UID;
5851                                             resolve_state = Type::eResolveStateFull;
5852                                         }
5853                                     }
5854                                 }
5855                             }
5856                         }
5857                     }
5858 
5859                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5860                                              this,
5861                                              type_name_const_str,
5862                                              byte_size,
5863                                              NULL,
5864                                              encoding_uid,
5865                                              encoding_data_type,
5866                                              &decl,
5867                                              clang_type,
5868                                              resolve_state));
5869 
5870                     m_die_to_type[die] = type_sp.get();
5871 
5872 //                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5873 //                  if (encoding_type != NULL)
5874 //                  {
5875 //                      if (encoding_type != DIE_IS_BEING_PARSED)
5876 //                          type_sp->SetEncodingType(encoding_type);
5877 //                      else
5878 //                          m_indirect_fixups.push_back(type_sp.get());
5879 //                  }
5880                 }
5881                 break;
5882 
5883             case DW_TAG_structure_type:
5884             case DW_TAG_union_type:
5885             case DW_TAG_class_type:
5886                 {
5887                     // Set a bit that lets us know that we are currently parsing this
5888                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5889                     bool byte_size_valid = false;
5890 
5891                     LanguageType class_language = eLanguageTypeUnknown;
5892                     bool is_complete_objc_class = false;
5893                     //bool struct_is_class = false;
5894                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5895                     if (num_attributes > 0)
5896                     {
5897                         uint32_t i;
5898                         for (i=0; i<num_attributes; ++i)
5899                         {
5900                             attr = attributes.AttributeAtIndex(i);
5901                             DWARFFormValue form_value;
5902                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5903                             {
5904                                 switch (attr)
5905                                 {
5906                                 case DW_AT_decl_file:
5907                                     if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
5908 									{
5909 										// llvm-gcc outputs invalid DW_AT_decl_file attributes that always
5910 										// point to the compile unit file, so we clear this invalid value
5911 										// so that we can still unique types efficiently.
5912                                         decl.SetFile(FileSpec ("<invalid>", false));
5913 									}
5914                                     else
5915                                         decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
5916                                     break;
5917 
5918                                 case DW_AT_decl_line:
5919                                     decl.SetLine(form_value.Unsigned());
5920                                     break;
5921 
5922                                 case DW_AT_decl_column:
5923                                     decl.SetColumn(form_value.Unsigned());
5924                                     break;
5925 
5926                                 case DW_AT_name:
5927                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5928                                     type_name_const_str.SetCString(type_name_cstr);
5929                                     break;
5930 
5931                                 case DW_AT_byte_size:
5932                                     byte_size = form_value.Unsigned();
5933                                     byte_size_valid = true;
5934                                     break;
5935 
5936                                 case DW_AT_accessibility:
5937                                     accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
5938                                     break;
5939 
5940                                 case DW_AT_declaration:
5941                                     is_forward_declaration = form_value.Boolean();
5942                                     break;
5943 
5944                                 case DW_AT_APPLE_runtime_class:
5945                                     class_language = (LanguageType)form_value.Signed();
5946                                     break;
5947 
5948                                 case DW_AT_APPLE_objc_complete_type:
5949                                     is_complete_objc_class = form_value.Signed();
5950                                     break;
5951 
5952                                 case DW_AT_allocated:
5953                                 case DW_AT_associated:
5954                                 case DW_AT_data_location:
5955                                 case DW_AT_description:
5956                                 case DW_AT_start_scope:
5957                                 case DW_AT_visibility:
5958                                 default:
5959                                 case DW_AT_sibling:
5960                                     break;
5961                                 }
5962                             }
5963                         }
5964                     }
5965 
5966                     UniqueDWARFASTType unique_ast_entry;
5967 
5968                     // Only try and unique the type if it has a name.
5969                     if (type_name_const_str &&
5970                         GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
5971                                                          this,
5972                                                          dwarf_cu,
5973                                                          die,
5974                                                          decl,
5975                                                          byte_size_valid ? byte_size : -1,
5976                                                          unique_ast_entry))
5977                     {
5978                         // We have already parsed this type or from another
5979                         // compile unit. GCC loves to use the "one definition
5980                         // rule" which can result in multiple definitions
5981                         // of the same class over and over in each compile
5982                         // unit.
5983                         type_sp = unique_ast_entry.m_type_sp;
5984                         if (type_sp)
5985                         {
5986                             m_die_to_type[die] = type_sp.get();
5987                             return type_sp;
5988                         }
5989                     }
5990 
5991                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
5992 
5993                     int tag_decl_kind = -1;
5994                     AccessType default_accessibility = eAccessNone;
5995                     if (tag == DW_TAG_structure_type)
5996                     {
5997                         tag_decl_kind = clang::TTK_Struct;
5998                         default_accessibility = eAccessPublic;
5999                     }
6000                     else if (tag == DW_TAG_union_type)
6001                     {
6002                         tag_decl_kind = clang::TTK_Union;
6003                         default_accessibility = eAccessPublic;
6004                     }
6005                     else if (tag == DW_TAG_class_type)
6006                     {
6007                         tag_decl_kind = clang::TTK_Class;
6008                         default_accessibility = eAccessPrivate;
6009                     }
6010 
6011                     if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6012                         die->HasChildren() == false &&
6013                         sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6014                     {
6015                         // Work around an issue with clang at the moment where
6016                         // forward declarations for objective C classes are emitted
6017                         // as:
6018                         //  DW_TAG_structure_type [2]
6019                         //  DW_AT_name( "ForwardObjcClass" )
6020                         //  DW_AT_byte_size( 0x00 )
6021                         //  DW_AT_decl_file( "..." )
6022                         //  DW_AT_decl_line( 1 )
6023                         //
6024                         // Note that there is no DW_AT_declaration and there are
6025                         // no children, and the byte size is zero.
6026                         is_forward_declaration = true;
6027                     }
6028 
6029                     if (class_language == eLanguageTypeObjC ||
6030                         class_language == eLanguageTypeObjC_plus_plus)
6031                     {
6032                         if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6033                         {
6034                             // We have a valid eSymbolTypeObjCClass class symbol whose
6035                             // name matches the current objective C class that we
6036                             // are trying to find and this DIE isn't the complete
6037                             // definition (we checked is_complete_objc_class above and
6038                             // know it is false), so the real definition is in here somewhere
6039                             type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6040 
6041                             if (!type_sp && GetDebugMapSymfile ())
6042                             {
6043                                 // We weren't able to find a full declaration in
6044                                 // this DWARF, see if we have a declaration anywhere
6045                                 // else...
6046                                 type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6047                             }
6048 
6049                             if (type_sp)
6050                             {
6051                                 if (log)
6052                                 {
6053                                     GetObjectFile()->GetModule()->LogMessage (log,
6054                                                                               "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6055                                                                               this,
6056                                                                               die->GetOffset(),
6057                                                                               DW_TAG_value_to_name(tag),
6058                                                                               type_name_cstr,
6059                                                                               type_sp->GetID());
6060                                 }
6061 
6062                                 // We found a real definition for this type elsewhere
6063                                 // so lets use it and cache the fact that we found
6064                                 // a complete type for this die
6065                                 m_die_to_type[die] = type_sp.get();
6066                                 return type_sp;
6067                             }
6068                         }
6069                     }
6070 
6071 
6072                     if (is_forward_declaration)
6073                     {
6074                         // We have a forward declaration to a type and we need
6075                         // to try and find a full declaration. We look in the
6076                         // current type index just in case we have a forward
6077                         // declaration followed by an actual declarations in the
6078                         // DWARF. If this fails, we need to look elsewhere...
6079                         if (log)
6080                         {
6081                             GetObjectFile()->GetModule()->LogMessage (log,
6082                                                                       "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6083                                                                       this,
6084                                                                       die->GetOffset(),
6085                                                                       DW_TAG_value_to_name(tag),
6086                                                                       type_name_cstr);
6087                         }
6088 
6089                         DWARFDeclContext die_decl_ctx;
6090                         die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6091 
6092                         //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6093                         type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6094 
6095                         if (!type_sp && GetDebugMapSymfile ())
6096                         {
6097                             // We weren't able to find a full declaration in
6098                             // this DWARF, see if we have a declaration anywhere
6099                             // else...
6100                             type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6101                         }
6102 
6103                         if (type_sp)
6104                         {
6105                             if (log)
6106                             {
6107                                 GetObjectFile()->GetModule()->LogMessage (log,
6108                                                                           "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6109                                                                           this,
6110                                                                           die->GetOffset(),
6111                                                                           DW_TAG_value_to_name(tag),
6112                                                                           type_name_cstr,
6113                                                                           type_sp->GetID());
6114                             }
6115 
6116                             // We found a real definition for this type elsewhere
6117                             // so lets use it and cache the fact that we found
6118                             // a complete type for this die
6119                             m_die_to_type[die] = type_sp.get();
6120                             return type_sp;
6121                         }
6122                     }
6123                     assert (tag_decl_kind != -1);
6124                     bool clang_type_was_created = false;
6125                     clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6126                     if (!clang_type)
6127                     {
6128                         const DWARFDebugInfoEntry *decl_ctx_die;
6129 
6130                         clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6131                         if (accessibility == eAccessNone && decl_ctx)
6132                         {
6133                             // Check the decl context that contains this class/struct/union.
6134                             // If it is a class we must give it an accessability.
6135                             const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6136                             if (DeclKindIsCXXClass (containing_decl_kind))
6137                                 accessibility = default_accessibility;
6138                         }
6139 
6140                         ClangASTMetadata metadata;
6141                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6142                         metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6143 
6144                         if (type_name_cstr && strchr (type_name_cstr, '<'))
6145                         {
6146                             ClangASTContext::TemplateParameterInfos template_param_infos;
6147                             if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6148                             {
6149                                 clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6150                                                                                                         accessibility,
6151                                                                                                         type_name_cstr,
6152                                                                                                         tag_decl_kind,
6153                                                                                                         template_param_infos);
6154 
6155                                 clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6156                                                                                                                                                class_template_decl,
6157                                                                                                                                                tag_decl_kind,
6158                                                                                                                                                template_param_infos);
6159                                 clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6160                                 clang_type_was_created = true;
6161 
6162                                 GetClangASTContext().SetMetadata (class_template_decl, metadata);
6163                                 GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6164                             }
6165                         }
6166 
6167                         if (!clang_type_was_created)
6168                         {
6169                             clang_type_was_created = true;
6170                             clang_type = ast.CreateRecordType (decl_ctx,
6171                                                                accessibility,
6172                                                                type_name_cstr,
6173                                                                tag_decl_kind,
6174                                                                class_language,
6175                                                                &metadata);
6176                         }
6177                     }
6178 
6179                     // Store a forward declaration to this class type in case any
6180                     // parameters in any class methods need it for the clang
6181                     // types for function prototypes.
6182                     LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6183                     type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6184                                              this,
6185                                              type_name_const_str,
6186                                              byte_size,
6187                                              NULL,
6188                                              LLDB_INVALID_UID,
6189                                              Type::eEncodingIsUID,
6190                                              &decl,
6191                                              clang_type,
6192                                              Type::eResolveStateForward));
6193 
6194                     type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6195 
6196 
6197                     // Add our type to the unique type map so we don't
6198                     // end up creating many copies of the same type over
6199                     // and over in the ASTContext for our module
6200                     unique_ast_entry.m_type_sp = type_sp;
6201                     unique_ast_entry.m_symfile = this;
6202                     unique_ast_entry.m_cu = dwarf_cu;
6203                     unique_ast_entry.m_die = die;
6204                     unique_ast_entry.m_declaration = decl;
6205                     unique_ast_entry.m_byte_size = byte_size;
6206                     GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6207                                                        unique_ast_entry);
6208 
6209                     if (is_forward_declaration && die->HasChildren())
6210                     {
6211                         // Check to see if the DIE actually has a definition, some version of GCC will
6212                         // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6213                         // members, or inheritance, so we can't trust it
6214                         const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6215                         while (child_die)
6216                         {
6217                             switch (child_die->Tag())
6218                             {
6219                                 case DW_TAG_inheritance:
6220                                 case DW_TAG_subprogram:
6221                                 case DW_TAG_member:
6222                                 case DW_TAG_APPLE_property:
6223                                     child_die = NULL;
6224                                     is_forward_declaration = false;
6225                                     break;
6226                                 default:
6227                                     child_die = child_die->GetSibling();
6228                                     break;
6229                             }
6230                         }
6231                     }
6232 
6233                     if (!is_forward_declaration)
6234                     {
6235                         // Always start the definition for a class type so that
6236                         // if the class has child classes or types that require
6237                         // the class to be created for use as their decl contexts
6238                         // the class will be ready to accept these child definitions.
6239                         if (die->HasChildren() == false)
6240                         {
6241                             // No children for this struct/union/class, lets finish it
6242                             clang_type.StartTagDeclarationDefinition ();
6243                             clang_type.CompleteTagDeclarationDefinition ();
6244 
6245                             if (tag == DW_TAG_structure_type) // this only applies in C
6246                             {
6247                                 clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6248 
6249                                 if (record_decl)
6250                                 {
6251                                     LayoutInfo layout_info;
6252 
6253                                     layout_info.alignment = 0;
6254                                     layout_info.bit_size = 0;
6255 
6256                                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
6257                                 }
6258                             }
6259                         }
6260                         else if (clang_type_was_created)
6261                         {
6262                             // Start the definition if the class is not objective C since
6263                             // the underlying decls respond to isCompleteDefinition(). Objective
6264                             // C decls dont' respond to isCompleteDefinition() so we can't
6265                             // start the declaration definition right away. For C++ classs/union/structs
6266                             // we want to start the definition in case the class is needed as the
6267                             // declaration context for a contained class or type without the need
6268                             // to complete that type..
6269 
6270                             if (class_language != eLanguageTypeObjC &&
6271                                 class_language != eLanguageTypeObjC_plus_plus)
6272                                 clang_type.StartTagDeclarationDefinition ();
6273 
6274                             // Leave this as a forward declaration until we need
6275                             // to know the details of the type. lldb_private::Type
6276                             // will automatically call the SymbolFile virtual function
6277                             // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6278                             // When the definition needs to be defined.
6279                             m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6280                             m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6281                             clang_type.SetHasExternalStorage (true);
6282                         }
6283                     }
6284 
6285                 }
6286                 break;
6287 
6288             case DW_TAG_enumeration_type:
6289                 {
6290                     // Set a bit that lets us know that we are currently parsing this
6291                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6292 
6293                     lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6294 
6295                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6296                     if (num_attributes > 0)
6297                     {
6298                         uint32_t i;
6299 
6300                         for (i=0; i<num_attributes; ++i)
6301                         {
6302                             attr = attributes.AttributeAtIndex(i);
6303                             DWARFFormValue form_value;
6304                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6305                             {
6306                                 switch (attr)
6307                                 {
6308                                 case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6309                                 case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6310                                 case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6311                                 case DW_AT_name:
6312                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6313                                     type_name_const_str.SetCString(type_name_cstr);
6314                                     break;
6315                                 case DW_AT_type:            encoding_uid = form_value.Reference(dwarf_cu); break;
6316                                 case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6317                                 case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6318                                 case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6319                                 case DW_AT_allocated:
6320                                 case DW_AT_associated:
6321                                 case DW_AT_bit_stride:
6322                                 case DW_AT_byte_stride:
6323                                 case DW_AT_data_location:
6324                                 case DW_AT_description:
6325                                 case DW_AT_start_scope:
6326                                 case DW_AT_visibility:
6327                                 case DW_AT_specification:
6328                                 case DW_AT_abstract_origin:
6329                                 case DW_AT_sibling:
6330                                     break;
6331                                 }
6332                             }
6333                         }
6334 
6335                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6336 
6337                         ClangASTType enumerator_clang_type;
6338                         clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6339                         if (!clang_type)
6340                         {
6341                             if (encoding_uid != DW_INVALID_OFFSET)
6342                             {
6343                                 Type *enumerator_type = ResolveTypeUID(encoding_uid);
6344                                 if (enumerator_type)
6345                                     enumerator_clang_type = enumerator_type->GetClangFullType();
6346                             }
6347 
6348                             if (!enumerator_clang_type)
6349                                 enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6350                                                                                                       DW_ATE_signed,
6351                                                                                                       byte_size * 8);
6352 
6353                             clang_type = ast.CreateEnumerationType (type_name_cstr,
6354                                                                     GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6355                                                                     decl,
6356                                                                     enumerator_clang_type);
6357                         }
6358                         else
6359                         {
6360                             enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6361                         }
6362 
6363                         LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6364 
6365                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6366                                                  this,
6367                                                  type_name_const_str,
6368                                                  byte_size,
6369                                                  NULL,
6370                                                  encoding_uid,
6371                                                  Type::eEncodingIsUID,
6372                                                  &decl,
6373                                                  clang_type,
6374                                                  Type::eResolveStateForward));
6375 
6376                         clang_type.StartTagDeclarationDefinition ();
6377                         if (die->HasChildren())
6378                         {
6379                             SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6380                             bool is_signed = false;
6381                             enumerator_clang_type.IsIntegerType(is_signed);
6382                             ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6383                         }
6384                         clang_type.CompleteTagDeclarationDefinition ();
6385                     }
6386                 }
6387                 break;
6388 
6389             case DW_TAG_inlined_subroutine:
6390             case DW_TAG_subprogram:
6391             case DW_TAG_subroutine_type:
6392                 {
6393                     // Set a bit that lets us know that we are currently parsing this
6394                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6395 
6396                     //const char *mangled = NULL;
6397                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6398                     bool is_variadic = false;
6399                     bool is_inline = false;
6400                     bool is_static = false;
6401                     bool is_virtual = false;
6402                     bool is_explicit = false;
6403                     bool is_artificial = false;
6404                     dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6405                     dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6406                     dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6407 
6408                     unsigned type_quals = 0;
6409                     clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6410 
6411 
6412                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6413                     if (num_attributes > 0)
6414                     {
6415                         uint32_t i;
6416                         for (i=0; i<num_attributes; ++i)
6417                         {
6418                             attr = attributes.AttributeAtIndex(i);
6419                             DWARFFormValue form_value;
6420                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6421                             {
6422                                 switch (attr)
6423                                 {
6424                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6425                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6426                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6427                                 case DW_AT_name:
6428                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6429                                     type_name_const_str.SetCString(type_name_cstr);
6430                                     break;
6431 
6432                                 case DW_AT_linkage_name:
6433                                 case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6434                                 case DW_AT_type:                type_die_offset = form_value.Reference(dwarf_cu); break;
6435                                 case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6436                                 case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6437                                 case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6438                                 case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6439                                 case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6440                                 case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6441 
6442 
6443                                 case DW_AT_external:
6444                                     if (form_value.Unsigned())
6445                                     {
6446                                         if (storage == clang::SC_None)
6447                                             storage = clang::SC_Extern;
6448                                         else
6449                                             storage = clang::SC_PrivateExtern;
6450                                     }
6451                                     break;
6452 
6453                                 case DW_AT_specification:
6454                                     specification_die_offset = form_value.Reference(dwarf_cu);
6455                                     break;
6456 
6457                                 case DW_AT_abstract_origin:
6458                                     abstract_origin_die_offset = form_value.Reference(dwarf_cu);
6459                                     break;
6460 
6461                                 case DW_AT_object_pointer:
6462                                     object_pointer_die_offset = form_value.Reference(dwarf_cu);
6463                                     break;
6464 
6465                                 case DW_AT_allocated:
6466                                 case DW_AT_associated:
6467                                 case DW_AT_address_class:
6468                                 case DW_AT_calling_convention:
6469                                 case DW_AT_data_location:
6470                                 case DW_AT_elemental:
6471                                 case DW_AT_entry_pc:
6472                                 case DW_AT_frame_base:
6473                                 case DW_AT_high_pc:
6474                                 case DW_AT_low_pc:
6475                                 case DW_AT_prototyped:
6476                                 case DW_AT_pure:
6477                                 case DW_AT_ranges:
6478                                 case DW_AT_recursive:
6479                                 case DW_AT_return_addr:
6480                                 case DW_AT_segment:
6481                                 case DW_AT_start_scope:
6482                                 case DW_AT_static_link:
6483                                 case DW_AT_trampoline:
6484                                 case DW_AT_visibility:
6485                                 case DW_AT_vtable_elem_location:
6486                                 case DW_AT_description:
6487                                 case DW_AT_sibling:
6488                                     break;
6489                                 }
6490                             }
6491                         }
6492                     }
6493 
6494                     std::string object_pointer_name;
6495                     if (object_pointer_die_offset != DW_INVALID_OFFSET)
6496                     {
6497                         // Get the name from the object pointer die
6498                         StreamString s;
6499                         if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6500                         {
6501                             object_pointer_name.assign(s.GetData());
6502                         }
6503                     }
6504 
6505                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6506 
6507                     ClangASTType return_clang_type;
6508                     Type *func_type = NULL;
6509 
6510                     if (type_die_offset != DW_INVALID_OFFSET)
6511                         func_type = ResolveTypeUID(type_die_offset);
6512 
6513                     if (func_type)
6514                         return_clang_type = func_type->GetClangForwardType();
6515                     else
6516                         return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6517 
6518 
6519                     std::vector<ClangASTType> function_param_types;
6520                     std::vector<clang::ParmVarDecl*> function_param_decls;
6521 
6522                     // Parse the function children for the parameters
6523 
6524                     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6525                     clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6526                     const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6527 
6528                     const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6529                     // Start off static. This will be set to false in ParseChildParameters(...)
6530                     // if we find a "this" paramters as the first parameter
6531                     if (is_cxx_method)
6532                         is_static = true;
6533                     ClangASTContext::TemplateParameterInfos template_param_infos;
6534 
6535                     if (die->HasChildren())
6536                     {
6537                         bool skip_artificial = true;
6538                         ParseChildParameters (sc,
6539                                               containing_decl_ctx,
6540                                               dwarf_cu,
6541                                               die,
6542                                               skip_artificial,
6543                                               is_static,
6544                                               type_list,
6545                                               function_param_types,
6546                                               function_param_decls,
6547                                               type_quals,
6548                                               template_param_infos);
6549                     }
6550 
6551                     // clang_type will get the function prototype clang type after this call
6552                     clang_type = ast.CreateFunctionType (return_clang_type,
6553                                                          function_param_types.data(),
6554                                                          function_param_types.size(),
6555                                                          is_variadic,
6556                                                          type_quals);
6557 
6558                     bool ignore_containing_context = false;
6559 
6560                     if (type_name_cstr)
6561                     {
6562                         bool type_handled = false;
6563                         if (tag == DW_TAG_subprogram)
6564                         {
6565                             ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6566                             if (objc_method.IsValid(true))
6567                             {
6568                                 SymbolContext empty_sc;
6569                                 ClangASTType class_opaque_type;
6570                                 ConstString class_name(objc_method.GetClassName());
6571                                 if (class_name)
6572                                 {
6573                                     TypeList types;
6574                                     TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6575 
6576                                     if (complete_objc_class_type_sp)
6577                                     {
6578                                         ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6579                                         if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6580                                             class_opaque_type = type_clang_forward_type;
6581                                     }
6582                                 }
6583 
6584                                 if (class_opaque_type)
6585                                 {
6586                                     // If accessibility isn't set to anything valid, assume public for
6587                                     // now...
6588                                     if (accessibility == eAccessNone)
6589                                         accessibility = eAccessPublic;
6590 
6591                                     clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6592                                                                                                                            clang_type,
6593                                                                                                                            accessibility,
6594                                                                                                                            is_artificial);
6595                                     type_handled = objc_method_decl != NULL;
6596                                     if (type_handled)
6597                                     {
6598                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6599                                         GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6600                                     }
6601                                     else
6602                                     {
6603                                         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",
6604                                                                                    die->GetOffset(),
6605                                                                                    tag,
6606                                                                                    DW_TAG_value_to_name(tag));
6607                                     }
6608                                 }
6609                             }
6610                             else if (is_cxx_method)
6611                             {
6612                                 // Look at the parent of this DIE and see if is is
6613                                 // a class or struct and see if this is actually a
6614                                 // C++ method
6615                                 Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6616                                 if (class_type)
6617                                 {
6618                                     if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6619                                     {
6620                                         // We uniqued the parent class of this function to another class
6621                                         // so we now need to associate all dies under "decl_ctx_die" to
6622                                         // DIEs in the DIE for "class_type"...
6623                                         SymbolFileDWARF *class_symfile = NULL;
6624                                         DWARFCompileUnitSP class_type_cu_sp;
6625                                         const DWARFDebugInfoEntry *class_type_die = NULL;
6626 
6627                                         SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6628                                         if (debug_map_symfile)
6629                                         {
6630                                             class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6631                                             class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6632                                         }
6633                                         else
6634                                         {
6635                                             class_symfile = this;
6636                                             class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6637                                         }
6638                                         if (class_type_die)
6639                                         {
6640                                             llvm::SmallVector<const DWARFDebugInfoEntry *, 0> failures;
6641 
6642                                             CopyUniqueClassMethodTypes (class_symfile,
6643                                                                         class_type,
6644                                                                         class_type_cu_sp.get(),
6645                                                                         class_type_die,
6646                                                                         dwarf_cu,
6647                                                                         decl_ctx_die,
6648                                                                         failures);
6649 
6650                                             // FIXME do something with these failures that's smarter than
6651                                             // just dropping them on the ground.  Unfortunately classes don't
6652                                             // like having stuff added to them after their definitions are
6653                                             // complete...
6654 
6655                                             type_ptr = m_die_to_type[die];
6656                                             if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6657                                             {
6658                                                 type_sp = type_ptr->shared_from_this();
6659                                                 break;
6660                                             }
6661                                         }
6662                                     }
6663 
6664                                     if (specification_die_offset != DW_INVALID_OFFSET)
6665                                     {
6666                                         // We have a specification which we are going to base our function
6667                                         // prototype off of, so we need this type to be completed so that the
6668                                         // m_die_to_decl_ctx for the method in the specification has a valid
6669                                         // clang decl context.
6670                                         class_type->GetClangForwardType();
6671                                         // If we have a specification, then the function type should have been
6672                                         // made with the specification and not with this die.
6673                                         DWARFCompileUnitSP spec_cu_sp;
6674                                         const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6675                                         clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6676                                         if (spec_clang_decl_ctx)
6677                                         {
6678                                             LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6679                                         }
6680                                         else
6681                                         {
6682                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6683                                                                                          MakeUserID(die->GetOffset()),
6684                                                                                          specification_die_offset);
6685                                         }
6686                                         type_handled = true;
6687                                     }
6688                                     else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6689                                     {
6690                                         // We have a specification which we are going to base our function
6691                                         // prototype off of, so we need this type to be completed so that the
6692                                         // m_die_to_decl_ctx for the method in the abstract origin has a valid
6693                                         // clang decl context.
6694                                         class_type->GetClangForwardType();
6695 
6696                                         DWARFCompileUnitSP abs_cu_sp;
6697                                         const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6698                                         clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6699                                         if (abs_clang_decl_ctx)
6700                                         {
6701                                             LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6702                                         }
6703                                         else
6704                                         {
6705                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6706                                                                                          MakeUserID(die->GetOffset()),
6707                                                                                          abstract_origin_die_offset);
6708                                         }
6709                                         type_handled = true;
6710                                     }
6711                                     else
6712                                     {
6713                                         ClangASTType class_opaque_type = class_type->GetClangForwardType();
6714                                         if (class_opaque_type.IsCXXClassType ())
6715                                         {
6716                                             if (class_opaque_type.IsBeingDefined ())
6717                                             {
6718                                                 // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6719                                                 // in the DWARF for C++ methods... Default to public for now...
6720                                                 if (accessibility == eAccessNone)
6721                                                     accessibility = eAccessPublic;
6722 
6723                                                 if (!is_static && !die->HasChildren())
6724                                                 {
6725                                                     // We have a C++ member function with no children (this pointer!)
6726                                                     // and clang will get mad if we try and make a function that isn't
6727                                                     // well formed in the DWARF, so we will just skip it...
6728                                                     type_handled = true;
6729                                                 }
6730                                                 else
6731                                                 {
6732                                                     clang::CXXMethodDecl *cxx_method_decl;
6733                                                     // REMOVE THE CRASH DESCRIPTION BELOW
6734                                                     Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6735                                                                                          type_name_cstr,
6736                                                                                          class_type->GetName().GetCString(),
6737                                                                                          MakeUserID(die->GetOffset()),
6738                                                                                          m_obj_file->GetFileSpec().GetPath().c_str());
6739 
6740                                                     const bool is_attr_used = false;
6741 
6742                                                     cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6743                                                                                                                   clang_type,
6744                                                                                                                   accessibility,
6745                                                                                                                   is_virtual,
6746                                                                                                                   is_static,
6747                                                                                                                   is_inline,
6748                                                                                                                   is_explicit,
6749                                                                                                                   is_attr_used,
6750                                                                                                                   is_artificial);
6751 
6752                                                     type_handled = cxx_method_decl != NULL;
6753 
6754                                                     if (type_handled)
6755                                                     {
6756                                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6757 
6758                                                         Host::SetCrashDescription (NULL);
6759 
6760 
6761                                                         ClangASTMetadata metadata;
6762                                                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6763 
6764                                                         if (!object_pointer_name.empty())
6765                                                         {
6766                                                             metadata.SetObjectPtrName(object_pointer_name.c_str());
6767                                                             if (log)
6768                                                                 log->Printf ("Setting object pointer name: %s on method object %p.\n",
6769                                                                              object_pointer_name.c_str(),
6770                                                                              cxx_method_decl);
6771                                                         }
6772                                                         GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6773                                                     }
6774                                                     else
6775                                                     {
6776                                                         ignore_containing_context = true;
6777                                                     }
6778                                                 }
6779                                             }
6780                                             else
6781                                             {
6782                                                 // We were asked to parse the type for a method in a class, yet the
6783                                                 // class hasn't been asked to complete itself through the
6784                                                 // clang::ExternalASTSource protocol, so we need to just have the
6785                                                 // class complete itself and do things the right way, then our
6786                                                 // DIE should then have an entry in the m_die_to_type map. First
6787                                                 // we need to modify the m_die_to_type so it doesn't think we are
6788                                                 // trying to parse this DIE anymore...
6789                                                 m_die_to_type[die] = NULL;
6790 
6791                                                 // Now we get the full type to force our class type to complete itself
6792                                                 // using the clang::ExternalASTSource protocol which will parse all
6793                                                 // base classes and all methods (including the method for this DIE).
6794                                                 class_type->GetClangFullType();
6795 
6796                                                 // The type for this DIE should have been filled in the function call above
6797                                                 type_ptr = m_die_to_type[die];
6798                                                 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6799                                                 {
6800                                                     type_sp = type_ptr->shared_from_this();
6801                                                     break;
6802                                                 }
6803 
6804                                                 // FIXME This is fixing some even uglier behavior but we really need to
6805                                                 // uniq the methods of each class as well as the class itself.
6806                                                 // <rdar://problem/11240464>
6807                                                 type_handled = true;
6808                                             }
6809                                         }
6810                                     }
6811                                 }
6812                             }
6813                         }
6814 
6815                         if (!type_handled)
6816                         {
6817                             // We just have a function that isn't part of a class
6818                             clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6819                                                                                                 type_name_cstr,
6820                                                                                                 clang_type,
6821                                                                                                 storage,
6822                                                                                                 is_inline);
6823 
6824 //                            if (template_param_infos.GetSize() > 0)
6825 //                            {
6826 //                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6827 //                                                                                                                  function_decl,
6828 //                                                                                                                  type_name_cstr,
6829 //                                                                                                                  template_param_infos);
6830 //
6831 //                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6832 //                                                                              func_template_decl,
6833 //                                                                              template_param_infos);
6834 //                            }
6835                             // Add the decl to our DIE to decl context map
6836                             assert (function_decl);
6837                             LinkDeclContextToDIE(function_decl, die);
6838                             if (!function_param_decls.empty())
6839                                 ast.SetFunctionParameters (function_decl,
6840                                                            &function_param_decls.front(),
6841                                                            function_param_decls.size());
6842 
6843                             ClangASTMetadata metadata;
6844                             metadata.SetUserID(MakeUserID(die->GetOffset()));
6845 
6846                             if (!object_pointer_name.empty())
6847                             {
6848                                 metadata.SetObjectPtrName(object_pointer_name.c_str());
6849                                 if (log)
6850                                     log->Printf ("Setting object pointer name: %s on function object %p.",
6851                                                  object_pointer_name.c_str(),
6852                                                 function_decl);
6853                             }
6854                             GetClangASTContext().SetMetadata (function_decl, metadata);
6855                         }
6856                     }
6857                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6858                                              this,
6859                                              type_name_const_str,
6860                                              0,
6861                                              NULL,
6862                                              LLDB_INVALID_UID,
6863                                              Type::eEncodingIsUID,
6864                                              &decl,
6865                                              clang_type,
6866                                              Type::eResolveStateFull));
6867                     assert(type_sp.get());
6868                 }
6869                 break;
6870 
6871             case DW_TAG_array_type:
6872                 {
6873                     // Set a bit that lets us know that we are currently parsing this
6874                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6875 
6876                     lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6877                     int64_t first_index = 0;
6878                     uint32_t byte_stride = 0;
6879                     uint32_t bit_stride = 0;
6880                     bool is_vector = false;
6881                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6882 
6883                     if (num_attributes > 0)
6884                     {
6885                         uint32_t i;
6886                         for (i=0; i<num_attributes; ++i)
6887                         {
6888                             attr = attributes.AttributeAtIndex(i);
6889                             DWARFFormValue form_value;
6890                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6891                             {
6892                                 switch (attr)
6893                                 {
6894                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6895                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6896                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6897                                 case DW_AT_name:
6898                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6899                                     type_name_const_str.SetCString(type_name_cstr);
6900                                     break;
6901 
6902                                 case DW_AT_type:            type_die_offset = form_value.Reference(dwarf_cu); break;
6903                                 case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
6904                                 case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
6905                                 case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
6906                                 case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
6907                                 case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6908                                 case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
6909                                 case DW_AT_allocated:
6910                                 case DW_AT_associated:
6911                                 case DW_AT_data_location:
6912                                 case DW_AT_description:
6913                                 case DW_AT_ordering:
6914                                 case DW_AT_start_scope:
6915                                 case DW_AT_visibility:
6916                                 case DW_AT_specification:
6917                                 case DW_AT_abstract_origin:
6918                                 case DW_AT_sibling:
6919                                     break;
6920                                 }
6921                             }
6922                         }
6923 
6924                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6925 
6926                         Type *element_type = ResolveTypeUID(type_die_offset);
6927 
6928                         if (element_type)
6929                         {
6930                             std::vector<uint64_t> element_orders;
6931                             ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
6932                             if (byte_stride == 0 && bit_stride == 0)
6933                                 byte_stride = element_type->GetByteSize();
6934                             ClangASTType array_element_type = element_type->GetClangForwardType();
6935                             uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
6936                             uint64_t num_elements = 0;
6937                             std::vector<uint64_t>::const_reverse_iterator pos;
6938                             std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
6939                             for (pos = element_orders.rbegin(); pos != end; ++pos)
6940                             {
6941                                 num_elements = *pos;
6942                                 clang_type = ast.CreateArrayType (array_element_type,
6943                                                                   num_elements,
6944                                                                   is_vector);
6945                                 array_element_type = clang_type;
6946                                 array_element_bit_stride = num_elements ? array_element_bit_stride * num_elements : array_element_bit_stride;
6947                             }
6948                             ConstString empty_name;
6949                             type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6950                                                      this,
6951                                                      empty_name,
6952                                                      array_element_bit_stride / 8,
6953                                                      NULL,
6954                                                      type_die_offset,
6955                                                      Type::eEncodingIsUID,
6956                                                      &decl,
6957                                                      clang_type,
6958                                                      Type::eResolveStateFull));
6959                             type_sp->SetEncodingType (element_type);
6960                         }
6961                     }
6962                 }
6963                 break;
6964 
6965             case DW_TAG_ptr_to_member_type:
6966                 {
6967                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6968                     dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
6969 
6970                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6971 
6972                     if (num_attributes > 0) {
6973                         uint32_t i;
6974                         for (i=0; i<num_attributes; ++i)
6975                         {
6976                             attr = attributes.AttributeAtIndex(i);
6977                             DWARFFormValue form_value;
6978                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6979                             {
6980                                 switch (attr)
6981                                 {
6982                                     case DW_AT_type:
6983                                         type_die_offset = form_value.Reference(dwarf_cu); break;
6984                                     case DW_AT_containing_type:
6985                                         containing_type_die_offset = form_value.Reference(dwarf_cu); break;
6986                                 }
6987                             }
6988                         }
6989 
6990                         Type *pointee_type = ResolveTypeUID(type_die_offset);
6991                         Type *class_type = ResolveTypeUID(containing_type_die_offset);
6992 
6993                         ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
6994                         ClangASTType class_clang_type = class_type->GetClangLayoutType();
6995 
6996                         clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
6997 
6998                         byte_size = clang_type.GetByteSize();
6999 
7000                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7001                                                  this,
7002                                                  type_name_const_str,
7003                                                  byte_size,
7004                                                  NULL,
7005                                                  LLDB_INVALID_UID,
7006                                                  Type::eEncodingIsUID,
7007                                                  NULL,
7008                                                  clang_type,
7009                                                  Type::eResolveStateForward));
7010                     }
7011 
7012                     break;
7013                 }
7014             default:
7015                 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",
7016                                                            die->GetOffset(),
7017                                                            tag,
7018                                                            DW_TAG_value_to_name(tag));
7019                 break;
7020             }
7021 
7022             if (type_sp.get())
7023             {
7024                 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7025                 dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7026 
7027                 SymbolContextScope * symbol_context_scope = NULL;
7028                 if (sc_parent_tag == DW_TAG_compile_unit)
7029                 {
7030                     symbol_context_scope = sc.comp_unit;
7031                 }
7032                 else if (sc.function != NULL)
7033                 {
7034                     symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7035                     if (symbol_context_scope == NULL)
7036                         symbol_context_scope = sc.function;
7037                 }
7038 
7039                 if (symbol_context_scope != NULL)
7040                 {
7041                     type_sp->SetSymbolContextScope(symbol_context_scope);
7042                 }
7043 
7044                 // We are ready to put this type into the uniqued list up at the module level
7045                 type_list->Insert (type_sp);
7046 
7047                 m_die_to_type[die] = type_sp.get();
7048             }
7049         }
7050         else if (type_ptr != DIE_IS_BEING_PARSED)
7051         {
7052             type_sp = type_ptr->shared_from_this();
7053         }
7054     }
7055     return type_sp;
7056 }
7057 
7058 size_t
7059 SymbolFileDWARF::ParseTypes
7060 (
7061     const SymbolContext& sc,
7062     DWARFCompileUnit* dwarf_cu,
7063     const DWARFDebugInfoEntry *die,
7064     bool parse_siblings,
7065     bool parse_children
7066 )
7067 {
7068     size_t types_added = 0;
7069     while (die != NULL)
7070     {
7071         bool type_is_new = false;
7072         if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7073         {
7074             if (type_is_new)
7075                 ++types_added;
7076         }
7077 
7078         if (parse_children && die->HasChildren())
7079         {
7080             if (die->Tag() == DW_TAG_subprogram)
7081             {
7082                 SymbolContext child_sc(sc);
7083                 child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7084                 types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7085             }
7086             else
7087                 types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7088         }
7089 
7090         if (parse_siblings)
7091             die = die->GetSibling();
7092         else
7093             die = NULL;
7094     }
7095     return types_added;
7096 }
7097 
7098 
7099 size_t
7100 SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7101 {
7102     assert(sc.comp_unit && sc.function);
7103     size_t functions_added = 0;
7104     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7105     if (dwarf_cu)
7106     {
7107         dw_offset_t function_die_offset = sc.function->GetID();
7108         const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7109         if (function_die)
7110         {
7111             ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7112         }
7113     }
7114 
7115     return functions_added;
7116 }
7117 
7118 
7119 size_t
7120 SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7121 {
7122     // At least a compile unit must be valid
7123     assert(sc.comp_unit);
7124     size_t types_added = 0;
7125     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7126     if (dwarf_cu)
7127     {
7128         if (sc.function)
7129         {
7130             dw_offset_t function_die_offset = sc.function->GetID();
7131             const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7132             if (func_die && func_die->HasChildren())
7133             {
7134                 types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7135             }
7136         }
7137         else
7138         {
7139             const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7140             if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7141             {
7142                 types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7143             }
7144         }
7145     }
7146 
7147     return types_added;
7148 }
7149 
7150 size_t
7151 SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7152 {
7153     if (sc.comp_unit != NULL)
7154     {
7155         DWARFDebugInfo* info = DebugInfo();
7156         if (info == NULL)
7157             return 0;
7158 
7159         if (sc.function)
7160         {
7161             DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7162 
7163             if (dwarf_cu == NULL)
7164                 return 0;
7165 
7166             const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7167 
7168             dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7169             if (func_lo_pc != LLDB_INVALID_ADDRESS)
7170             {
7171                 const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7172 
7173                 // Let all blocks know they have parse all their variables
7174                 sc.function->GetBlock (false).SetDidParseVariables (true, true);
7175                 return num_variables;
7176             }
7177         }
7178         else if (sc.comp_unit)
7179         {
7180             DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7181 
7182             if (dwarf_cu == NULL)
7183                 return 0;
7184 
7185             uint32_t vars_added = 0;
7186             VariableListSP variables (sc.comp_unit->GetVariableList(false));
7187 
7188             if (variables.get() == NULL)
7189             {
7190                 variables.reset(new VariableList());
7191                 sc.comp_unit->SetVariableList(variables);
7192 
7193                 DWARFCompileUnit* match_dwarf_cu = NULL;
7194                 const DWARFDebugInfoEntry* die = NULL;
7195                 DIEArray die_offsets;
7196                 if (m_using_apple_tables)
7197                 {
7198                     if (m_apple_names_ap.get())
7199                     {
7200                         DWARFMappedHash::DIEInfoArray hash_data_array;
7201                         if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7202                                                                     dwarf_cu->GetNextCompileUnitOffset(),
7203                                                                     hash_data_array))
7204                         {
7205                             DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7206                         }
7207                     }
7208                 }
7209                 else
7210                 {
7211                     // Index if we already haven't to make sure the compile units
7212                     // get indexed and make their global DIE index list
7213                     if (!m_indexed)
7214                         Index ();
7215 
7216                     m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7217                                                                  dwarf_cu->GetNextCompileUnitOffset(),
7218                                                                  die_offsets);
7219                 }
7220 
7221                 const size_t num_matches = die_offsets.size();
7222                 if (num_matches)
7223                 {
7224                     DWARFDebugInfo* debug_info = DebugInfo();
7225                     for (size_t i=0; i<num_matches; ++i)
7226                     {
7227                         const dw_offset_t die_offset = die_offsets[i];
7228                         die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7229                         if (die)
7230                         {
7231                             VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7232                             if (var_sp)
7233                             {
7234                                 variables->AddVariableIfUnique (var_sp);
7235                                 ++vars_added;
7236                             }
7237                         }
7238                         else
7239                         {
7240                             if (m_using_apple_tables)
7241                             {
7242                                 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7243                             }
7244                         }
7245 
7246                     }
7247                 }
7248             }
7249             return vars_added;
7250         }
7251     }
7252     return 0;
7253 }
7254 
7255 
7256 VariableSP
7257 SymbolFileDWARF::ParseVariableDIE
7258 (
7259     const SymbolContext& sc,
7260     DWARFCompileUnit* dwarf_cu,
7261     const DWARFDebugInfoEntry *die,
7262     const lldb::addr_t func_low_pc
7263 )
7264 {
7265 
7266     VariableSP var_sp (m_die_to_variable_sp[die]);
7267     if (var_sp)
7268         return var_sp;  // Already been parsed!
7269 
7270     const dw_tag_t tag = die->Tag();
7271 
7272     if ((tag == DW_TAG_variable) ||
7273         (tag == DW_TAG_constant) ||
7274         (tag == DW_TAG_formal_parameter && sc.function))
7275     {
7276         DWARFDebugInfoEntry::Attributes attributes;
7277         const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7278         if (num_attributes > 0)
7279         {
7280             const char *name = NULL;
7281             const char *mangled = NULL;
7282             Declaration decl;
7283             uint32_t i;
7284             lldb::user_id_t type_uid = LLDB_INVALID_UID;
7285             DWARFExpression location;
7286             bool is_external = false;
7287             bool is_artificial = false;
7288             bool location_is_const_value_data = false;
7289             bool has_explicit_location = false;
7290             //AccessType accessibility = eAccessNone;
7291 
7292             for (i=0; i<num_attributes; ++i)
7293             {
7294                 dw_attr_t attr = attributes.AttributeAtIndex(i);
7295                 DWARFFormValue form_value;
7296                 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7297                 {
7298                     switch (attr)
7299                     {
7300                     case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7301                     case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7302                     case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7303                     case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7304                     case DW_AT_linkage_name:
7305                     case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7306                     case DW_AT_type:        type_uid = form_value.Reference(dwarf_cu); break;
7307                     case DW_AT_external:    is_external = form_value.Boolean(); break;
7308                     case DW_AT_const_value:
7309                         // If we have already found a DW_AT_location attribute, ignore this attribute.
7310                         if (!has_explicit_location)
7311                         {
7312                             location_is_const_value_data = true;
7313                             // The constant value will be either a block, a data value or a string.
7314                             const DataExtractor& debug_info_data = get_debug_info_data();
7315                             if (DWARFFormValue::IsBlockForm(form_value.Form()))
7316                             {
7317                                 // Retrieve the value as a block expression.
7318                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7319                                 uint32_t block_length = form_value.Unsigned();
7320                                 location.CopyOpcodeData(debug_info_data, block_offset, block_length);
7321                             }
7322                             else if (DWARFFormValue::IsDataForm(form_value.Form()))
7323                             {
7324                                 // Retrieve the value as a data expression.
7325                                 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7326                                 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7327                                 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7328                                 location.CopyOpcodeData(debug_info_data, data_offset, data_length);
7329                             }
7330                             else
7331                             {
7332                                 // Retrieve the value as a string expression.
7333                                 if (form_value.Form() == DW_FORM_strp)
7334                                 {
7335                                     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7336                                     uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7337                                     uint32_t data_length = fixed_form_sizes[form_value.Form()];
7338                                     location.CopyOpcodeData(debug_info_data, data_offset, data_length);
7339                                 }
7340                                 else
7341                                 {
7342                                     const char *str = form_value.AsCString(&debug_info_data);
7343                                     uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7344                                     uint32_t string_length = strlen(str) + 1;
7345                                     location.CopyOpcodeData(debug_info_data, string_offset, string_length);
7346                                 }
7347                             }
7348                         }
7349                         break;
7350                     case DW_AT_location:
7351                         {
7352                             location_is_const_value_data = false;
7353                             has_explicit_location = true;
7354                             if (form_value.BlockData())
7355                             {
7356                                 const DataExtractor& debug_info_data = get_debug_info_data();
7357 
7358                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7359                                 uint32_t block_length = form_value.Unsigned();
7360                                 location.CopyOpcodeData(get_debug_info_data(), block_offset, block_length);
7361                             }
7362                             else
7363                             {
7364                                 const DataExtractor&    debug_loc_data = get_debug_loc_data();
7365                                 const dw_offset_t debug_loc_offset = form_value.Unsigned();
7366 
7367                                 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7368                                 if (loc_list_length > 0)
7369                                 {
7370                                     location.CopyOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length);
7371                                     assert (func_low_pc != LLDB_INVALID_ADDRESS);
7372                                     location.SetLocationListSlide (func_low_pc - dwarf_cu->GetBaseAddress());
7373                                 }
7374                             }
7375                         }
7376                         break;
7377 
7378                     case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7379                     case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7380                     case DW_AT_declaration:
7381                     case DW_AT_description:
7382                     case DW_AT_endianity:
7383                     case DW_AT_segment:
7384                     case DW_AT_start_scope:
7385                     case DW_AT_visibility:
7386                     default:
7387                     case DW_AT_abstract_origin:
7388                     case DW_AT_sibling:
7389                     case DW_AT_specification:
7390                         break;
7391                     }
7392                 }
7393             }
7394 
7395             ValueType scope = eValueTypeInvalid;
7396 
7397             const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7398             dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7399             SymbolContextScope * symbol_context_scope = NULL;
7400 
7401             // DWARF doesn't specify if a DW_TAG_variable is a local, global
7402             // or static variable, so we have to do a little digging by
7403             // looking at the location of a varaible to see if it contains
7404             // a DW_OP_addr opcode _somewhere_ in the definition. I say
7405             // somewhere because clang likes to combine small global variables
7406             // into the same symbol and have locations like:
7407             // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7408             // So if we don't have a DW_TAG_formal_parameter, we can look at
7409             // the location to see if it contains a DW_OP_addr opcode, and
7410             // then we can correctly classify  our variables.
7411             if (tag == DW_TAG_formal_parameter)
7412                 scope = eValueTypeVariableArgument;
7413             else
7414             {
7415                 bool op_error = false;
7416                 // Check if the location has a DW_OP_addr with any address value...
7417                 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7418                 if (!location_is_const_value_data)
7419                 {
7420                     location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7421                     if (op_error)
7422                     {
7423                         StreamString strm;
7424                         location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7425                         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());
7426                     }
7427                 }
7428 
7429                 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7430                 {
7431                     if (is_external)
7432                         scope = eValueTypeVariableGlobal;
7433                     else
7434                         scope = eValueTypeVariableStatic;
7435 
7436 
7437                     SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7438 
7439                     if (debug_map_symfile)
7440                     {
7441                         // When leaving the DWARF in the .o files on darwin,
7442                         // when we have a global variable that wasn't initialized,
7443                         // the .o file might not have allocated a virtual
7444                         // address for the global variable. In this case it will
7445                         // have created a symbol for the global variable
7446                         // that is undefined/data and external and the value will
7447                         // be the byte size of the variable. When we do the
7448                         // address map in SymbolFileDWARFDebugMap we rely on
7449                         // having an address, we need to do some magic here
7450                         // so we can get the correct address for our global
7451                         // variable. The address for all of these entries
7452                         // will be zero, and there will be an undefined symbol
7453                         // in this object file, and the executable will have
7454                         // a matching symbol with a good address. So here we
7455                         // dig up the correct address and replace it in the
7456                         // location for the variable, and set the variable's
7457                         // symbol context scope to be that of the main executable
7458                         // so the file address will resolve correctly.
7459                         bool linked_oso_file_addr = false;
7460                         if (is_external && location_DW_OP_addr == 0)
7461                         {
7462                             // we have a possible uninitialized extern global
7463                             ConstString const_name(mangled ? mangled : name);
7464                             ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7465                             if (debug_map_objfile)
7466                             {
7467                                 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7468                                 if (debug_map_symtab)
7469                                 {
7470                                     Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7471                                                                                                            eSymbolTypeData,
7472                                                                                                            Symtab::eDebugYes,
7473                                                                                                            Symtab::eVisibilityExtern);
7474                                     if (exe_symbol)
7475                                     {
7476                                         if (exe_symbol->ValueIsAddress())
7477                                         {
7478                                             const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
7479                                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7480                                             {
7481                                                 if (location.Update_DW_OP_addr (exe_file_addr))
7482                                                 {
7483                                                     linked_oso_file_addr = true;
7484                                                     symbol_context_scope = exe_symbol;
7485                                                 }
7486                                             }
7487                                         }
7488                                     }
7489                                 }
7490                             }
7491                         }
7492 
7493                         if (!linked_oso_file_addr)
7494                         {
7495                             // The DW_OP_addr is not zero, but it contains a .o file address which
7496                             // needs to be linked up correctly.
7497                             const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7498                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7499                             {
7500                                 // Update the file address for this variable
7501                                 location.Update_DW_OP_addr (exe_file_addr);
7502                             }
7503                             else
7504                             {
7505                                 // Variable didn't make it into the final executable
7506                                 return var_sp;
7507                             }
7508                         }
7509                     }
7510                 }
7511                 else
7512                 {
7513                     scope = eValueTypeVariableLocal;
7514                 }
7515             }
7516 
7517             if (symbol_context_scope == NULL)
7518             {
7519                 switch (parent_tag)
7520                 {
7521                 case DW_TAG_subprogram:
7522                 case DW_TAG_inlined_subroutine:
7523                 case DW_TAG_lexical_block:
7524                     if (sc.function)
7525                     {
7526                         symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7527                         if (symbol_context_scope == NULL)
7528                             symbol_context_scope = sc.function;
7529                     }
7530                     break;
7531 
7532                 default:
7533                     symbol_context_scope = sc.comp_unit;
7534                     break;
7535                 }
7536             }
7537 
7538             if (symbol_context_scope)
7539             {
7540                 var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7541                                             name,
7542                                             mangled,
7543                                             SymbolFileTypeSP (new SymbolFileType(*this, type_uid)),
7544                                             scope,
7545                                             symbol_context_scope,
7546                                             &decl,
7547                                             location,
7548                                             is_external,
7549                                             is_artificial));
7550 
7551                 var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7552             }
7553             else
7554             {
7555                 // Not ready to parse this variable yet. It might be a global
7556                 // or static variable that is in a function scope and the function
7557                 // in the symbol context wasn't filled in yet
7558                 return var_sp;
7559             }
7560         }
7561         // Cache var_sp even if NULL (the variable was just a specification or
7562         // was missing vital information to be able to be displayed in the debugger
7563         // (missing location due to optimization, etc)) so we don't re-parse
7564         // this DIE over and over later...
7565         m_die_to_variable_sp[die] = var_sp;
7566     }
7567     return var_sp;
7568 }
7569 
7570 
7571 const DWARFDebugInfoEntry *
7572 SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7573                                                    dw_offset_t spec_block_die_offset,
7574                                                    DWARFCompileUnit **result_die_cu_handle)
7575 {
7576     // Give the concrete function die specified by "func_die_offset", find the
7577     // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7578     // to "spec_block_die_offset"
7579     DWARFDebugInfo* info = DebugInfo();
7580 
7581     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7582     if (die)
7583     {
7584         assert (*result_die_cu_handle);
7585         return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7586     }
7587     return NULL;
7588 }
7589 
7590 
7591 const DWARFDebugInfoEntry *
7592 SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7593                                                   const DWARFDebugInfoEntry *die,
7594                                                   dw_offset_t spec_block_die_offset,
7595                                                   DWARFCompileUnit **result_die_cu_handle)
7596 {
7597     if (die)
7598     {
7599         switch (die->Tag())
7600         {
7601         case DW_TAG_subprogram:
7602         case DW_TAG_inlined_subroutine:
7603         case DW_TAG_lexical_block:
7604             {
7605                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7606                 {
7607                     *result_die_cu_handle = dwarf_cu;
7608                     return die;
7609                 }
7610 
7611                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7612                 {
7613                     *result_die_cu_handle = dwarf_cu;
7614                     return die;
7615                 }
7616             }
7617             break;
7618         }
7619 
7620         // Give the concrete function die specified by "func_die_offset", find the
7621         // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7622         // to "spec_block_die_offset"
7623         for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7624         {
7625             const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7626                                                                                       child_die,
7627                                                                                       spec_block_die_offset,
7628                                                                                       result_die_cu_handle);
7629             if (result_die)
7630                 return result_die;
7631         }
7632     }
7633 
7634     *result_die_cu_handle = NULL;
7635     return NULL;
7636 }
7637 
7638 size_t
7639 SymbolFileDWARF::ParseVariables
7640 (
7641     const SymbolContext& sc,
7642     DWARFCompileUnit* dwarf_cu,
7643     const lldb::addr_t func_low_pc,
7644     const DWARFDebugInfoEntry *orig_die,
7645     bool parse_siblings,
7646     bool parse_children,
7647     VariableList* cc_variable_list
7648 )
7649 {
7650     if (orig_die == NULL)
7651         return 0;
7652 
7653     VariableListSP variable_list_sp;
7654 
7655     size_t vars_added = 0;
7656     const DWARFDebugInfoEntry *die = orig_die;
7657     while (die != NULL)
7658     {
7659         dw_tag_t tag = die->Tag();
7660 
7661         // Check to see if we have already parsed this variable or constant?
7662         if (m_die_to_variable_sp[die])
7663         {
7664             if (cc_variable_list)
7665                 cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7666         }
7667         else
7668         {
7669             // We haven't already parsed it, lets do that now.
7670             if ((tag == DW_TAG_variable) ||
7671                 (tag == DW_TAG_constant) ||
7672                 (tag == DW_TAG_formal_parameter && sc.function))
7673             {
7674                 if (variable_list_sp.get() == NULL)
7675                 {
7676                     const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7677                     dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7678                     switch (parent_tag)
7679                     {
7680                         case DW_TAG_compile_unit:
7681                             if (sc.comp_unit != NULL)
7682                             {
7683                                 variable_list_sp = sc.comp_unit->GetVariableList(false);
7684                                 if (variable_list_sp.get() == NULL)
7685                                 {
7686                                     variable_list_sp.reset(new VariableList());
7687                                     sc.comp_unit->SetVariableList(variable_list_sp);
7688                                 }
7689                             }
7690                             else
7691                             {
7692                                 GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7693                                                                            MakeUserID(sc_parent_die->GetOffset()),
7694                                                                            DW_TAG_value_to_name (parent_tag),
7695                                                                            MakeUserID(orig_die->GetOffset()),
7696                                                                            DW_TAG_value_to_name (orig_die->Tag()));
7697                             }
7698                             break;
7699 
7700                         case DW_TAG_subprogram:
7701                         case DW_TAG_inlined_subroutine:
7702                         case DW_TAG_lexical_block:
7703                             if (sc.function != NULL)
7704                             {
7705                                 // Check to see if we already have parsed the variables for the given scope
7706 
7707                                 Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7708                                 if (block == NULL)
7709                                 {
7710                                     // This must be a specification or abstract origin with
7711                                     // a concrete block couterpart in the current function. We need
7712                                     // to find the concrete block so we can correctly add the
7713                                     // variable to it
7714                                     DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7715                                     const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7716                                                                                                                       sc_parent_die->GetOffset(),
7717                                                                                                                       &concrete_block_die_cu);
7718                                     if (concrete_block_die)
7719                                         block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7720                                 }
7721 
7722                                 if (block != NULL)
7723                                 {
7724                                     const bool can_create = false;
7725                                     variable_list_sp = block->GetBlockVariableList (can_create);
7726                                     if (variable_list_sp.get() == NULL)
7727                                     {
7728                                         variable_list_sp.reset(new VariableList());
7729                                         block->SetVariableList(variable_list_sp);
7730                                     }
7731                                 }
7732                             }
7733                             break;
7734 
7735                         default:
7736                              GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7737                                                                         MakeUserID(orig_die->GetOffset()),
7738                                                                         DW_TAG_value_to_name (orig_die->Tag()));
7739                             break;
7740                     }
7741                 }
7742 
7743                 if (variable_list_sp)
7744                 {
7745                     VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7746                     if (var_sp)
7747                     {
7748                         variable_list_sp->AddVariableIfUnique (var_sp);
7749                         if (cc_variable_list)
7750                             cc_variable_list->AddVariableIfUnique (var_sp);
7751                         ++vars_added;
7752                     }
7753                 }
7754             }
7755         }
7756 
7757         bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7758 
7759         if (!skip_children && parse_children && die->HasChildren())
7760         {
7761             vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7762         }
7763 
7764         if (parse_siblings)
7765             die = die->GetSibling();
7766         else
7767             die = NULL;
7768     }
7769     return vars_added;
7770 }
7771 
7772 //------------------------------------------------------------------
7773 // PluginInterface protocol
7774 //------------------------------------------------------------------
7775 ConstString
7776 SymbolFileDWARF::GetPluginName()
7777 {
7778     return GetPluginNameStatic();
7779 }
7780 
7781 uint32_t
7782 SymbolFileDWARF::GetPluginVersion()
7783 {
7784     return 1;
7785 }
7786 
7787 void
7788 SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7789 {
7790     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7791     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7792     if (clang_type)
7793         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7794 }
7795 
7796 void
7797 SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7798 {
7799     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7800     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7801     if (clang_type)
7802         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7803 }
7804 
7805 void
7806 SymbolFileDWARF::DumpIndexes ()
7807 {
7808     StreamFile s(stdout, false);
7809 
7810     s.Printf ("DWARF index for (%s) '%s':",
7811               GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7812               GetObjectFile()->GetFileSpec().GetPath().c_str());
7813     s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7814     s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7815     s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7816     s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7817     s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7818     s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7819     s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7820     s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7821 }
7822 
7823 void
7824 SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7825                                     const char *name,
7826                                     llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7827 {
7828     DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7829 
7830     if (iter == m_decl_ctx_to_die.end())
7831         return;
7832 
7833     for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7834     {
7835         const DWARFDebugInfoEntry *context_die = *pos;
7836 
7837         if (!results)
7838             return;
7839 
7840         DWARFDebugInfo* info = DebugInfo();
7841 
7842         DIEArray die_offsets;
7843 
7844         DWARFCompileUnit* dwarf_cu = NULL;
7845         const DWARFDebugInfoEntry* die = NULL;
7846 
7847         if (m_using_apple_tables)
7848         {
7849             if (m_apple_types_ap.get())
7850                 m_apple_types_ap->FindByName (name, die_offsets);
7851         }
7852         else
7853         {
7854             if (!m_indexed)
7855                 Index ();
7856 
7857             m_type_index.Find (ConstString(name), die_offsets);
7858         }
7859 
7860         const size_t num_matches = die_offsets.size();
7861 
7862         if (num_matches)
7863         {
7864             for (size_t i = 0; i < num_matches; ++i)
7865             {
7866                 const dw_offset_t die_offset = die_offsets[i];
7867                 die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
7868 
7869                 if (die->GetParent() != context_die)
7870                     continue;
7871 
7872                 Type *matching_type = ResolveType (dwarf_cu, die);
7873 
7874                 clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
7875 
7876                 if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
7877                 {
7878                     clang::TagDecl *tag_decl = tag_type->getDecl();
7879                     results->push_back(tag_decl);
7880                 }
7881                 else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
7882                 {
7883                     clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
7884                     results->push_back(typedef_decl);
7885                 }
7886             }
7887         }
7888     }
7889 }
7890 
7891 void
7892 SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
7893                                                  const clang::DeclContext *decl_context,
7894                                                  clang::DeclarationName decl_name,
7895                                                  llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7896 {
7897 
7898     switch (decl_context->getDeclKind())
7899     {
7900     case clang::Decl::Namespace:
7901     case clang::Decl::TranslationUnit:
7902         {
7903             SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7904             symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
7905         }
7906         break;
7907     default:
7908         break;
7909     }
7910 }
7911 
7912 bool
7913 SymbolFileDWARF::LayoutRecordType (void *baton,
7914                                    const clang::RecordDecl *record_decl,
7915                                    uint64_t &size,
7916                                    uint64_t &alignment,
7917                                    llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7918                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7919                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7920 {
7921     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7922     return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
7923 }
7924 
7925 
7926 bool
7927 SymbolFileDWARF::LayoutRecordType (const clang::RecordDecl *record_decl,
7928                                    uint64_t &bit_size,
7929                                    uint64_t &alignment,
7930                                    llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7931                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7932                                    llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7933 {
7934     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
7935     RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
7936     bool success = false;
7937     base_offsets.clear();
7938     vbase_offsets.clear();
7939     if (pos != m_record_decl_to_layout_map.end())
7940     {
7941         bit_size = pos->second.bit_size;
7942         alignment = pos->second.alignment;
7943         field_offsets.swap(pos->second.field_offsets);
7944         base_offsets.swap (pos->second.base_offsets);
7945         vbase_offsets.swap (pos->second.vbase_offsets);
7946         m_record_decl_to_layout_map.erase(pos);
7947         success = true;
7948     }
7949     else
7950     {
7951         bit_size = 0;
7952         alignment = 0;
7953         field_offsets.clear();
7954     }
7955 
7956     if (log)
7957         GetObjectFile()->GetModule()->LogMessage (log,
7958                                                   "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
7959                                                   record_decl,
7960                                                   bit_size,
7961                                                   alignment,
7962                                                   (uint32_t)field_offsets.size(),
7963                                                   (uint32_t)base_offsets.size(),
7964                                                   (uint32_t)vbase_offsets.size(),
7965                                                   success);
7966     return success;
7967 }
7968 
7969 
7970 SymbolFileDWARFDebugMap *
7971 SymbolFileDWARF::GetDebugMapSymfile ()
7972 {
7973     if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
7974     {
7975         lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
7976         if (module_sp)
7977         {
7978             SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
7979             if (sym_vendor)
7980                 m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
7981         }
7982     }
7983     return m_debug_map_symfile;
7984 }
7985 
7986 
7987