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