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