SymbolFileDWARF.cpp revision 276479
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#include <ctype.h>
70#include <string.h>
71
72//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
73
74#ifdef ENABLE_DEBUG_PRINTF
75#include <stdio.h>
76#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
77#else
78#define DEBUG_PRINTF(fmt, ...)
79#endif
80
81#define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
82
83using namespace lldb;
84using namespace lldb_private;
85
86//static inline bool
87//child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
88//{
89//    switch (tag)
90//    {
91//    default:
92//        break;
93//    case DW_TAG_subprogram:
94//    case DW_TAG_inlined_subroutine:
95//    case DW_TAG_class_type:
96//    case DW_TAG_structure_type:
97//    case DW_TAG_union_type:
98//        return true;
99//    }
100//    return false;
101//}
102//
103static AccessType
104DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
105{
106    switch (dwarf_accessibility)
107    {
108        case DW_ACCESS_public:      return eAccessPublic;
109        case DW_ACCESS_private:     return eAccessPrivate;
110        case DW_ACCESS_protected:   return eAccessProtected;
111        default:                    break;
112    }
113    return eAccessNone;
114}
115
116static const char*
117removeHostnameFromPathname(const char* path_from_dwarf)
118{
119    if (!path_from_dwarf || !path_from_dwarf[0])
120    {
121        return path_from_dwarf;
122    }
123
124    const char *colon_pos = strchr(path_from_dwarf, ':');
125    if (!colon_pos)
126    {
127        return path_from_dwarf;
128    }
129
130    // check whether we have a windows path, and so the first character
131    // is a drive-letter not a hostname.
132    if (
133        colon_pos == path_from_dwarf + 1 &&
134        isalpha(*path_from_dwarf) &&
135        strlen(path_from_dwarf) > 2 &&
136        '\\' == path_from_dwarf[2])
137    {
138        return path_from_dwarf;
139    }
140
141    return colon_pos + 1;
142}
143
144#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
145
146class DIEStack
147{
148public:
149
150    void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
151    {
152        m_dies.push_back (DIEInfo(cu, die));
153    }
154
155
156    void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
157    {
158        StreamString log_strm;
159        const size_t n = m_dies.size();
160        log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
161        for (size_t i=0; i<n; i++)
162        {
163            DWARFCompileUnit *cu = m_dies[i].cu;
164            const DWARFDebugInfoEntry *die = m_dies[i].die;
165            std::string qualified_name;
166            die->GetQualifiedName(dwarf, cu, qualified_name);
167            log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
168                             (uint64_t)i,
169                             die->GetOffset(),
170                             DW_TAG_value_to_name(die->Tag()),
171                             qualified_name.c_str());
172        }
173        log->PutCString(log_strm.GetData());
174    }
175    void Pop ()
176    {
177        m_dies.pop_back();
178    }
179
180    class ScopedPopper
181    {
182    public:
183        ScopedPopper (DIEStack &die_stack) :
184            m_die_stack (die_stack),
185            m_valid (false)
186        {
187        }
188
189        void
190        Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
191        {
192            m_valid = true;
193            m_die_stack.Push (cu, die);
194        }
195
196        ~ScopedPopper ()
197        {
198            if (m_valid)
199                m_die_stack.Pop();
200        }
201
202
203
204    protected:
205        DIEStack &m_die_stack;
206        bool m_valid;
207    };
208
209protected:
210    struct DIEInfo {
211        DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
212            cu(c),
213            die(d)
214        {
215        }
216        DWARFCompileUnit *cu;
217        const DWARFDebugInfoEntry *die;
218    };
219    typedef std::vector<DIEInfo> Stack;
220    Stack m_dies;
221};
222#endif
223
224void
225SymbolFileDWARF::Initialize()
226{
227    LogChannelDWARF::Initialize();
228    PluginManager::RegisterPlugin (GetPluginNameStatic(),
229                                   GetPluginDescriptionStatic(),
230                                   CreateInstance);
231}
232
233void
234SymbolFileDWARF::Terminate()
235{
236    PluginManager::UnregisterPlugin (CreateInstance);
237    LogChannelDWARF::Initialize();
238}
239
240
241lldb_private::ConstString
242SymbolFileDWARF::GetPluginNameStatic()
243{
244    static ConstString g_name("dwarf");
245    return g_name;
246}
247
248const char *
249SymbolFileDWARF::GetPluginDescriptionStatic()
250{
251    return "DWARF and DWARF3 debug symbol file reader.";
252}
253
254
255SymbolFile*
256SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
257{
258    return new SymbolFileDWARF(obj_file);
259}
260
261TypeList *
262SymbolFileDWARF::GetTypeList ()
263{
264    if (GetDebugMapSymfile ())
265        return m_debug_map_symfile->GetTypeList();
266    return m_obj_file->GetModule()->GetTypeList();
267
268}
269void
270SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
271                           const DWARFDebugInfoEntry *die,
272                           dw_offset_t min_die_offset,
273                           dw_offset_t max_die_offset,
274                           uint32_t type_mask,
275                           TypeSet &type_set)
276{
277    if (cu)
278    {
279        if (die)
280        {
281            const dw_offset_t die_offset = die->GetOffset();
282
283            if (die_offset >= max_die_offset)
284                return;
285
286            if (die_offset >= min_die_offset)
287            {
288                const dw_tag_t tag = die->Tag();
289
290                bool add_type = false;
291
292                switch (tag)
293                {
294                    case DW_TAG_array_type:         add_type = (type_mask & eTypeClassArray         ) != 0; break;
295                    case DW_TAG_unspecified_type:
296                    case DW_TAG_base_type:          add_type = (type_mask & eTypeClassBuiltin       ) != 0; break;
297                    case DW_TAG_class_type:         add_type = (type_mask & eTypeClassClass         ) != 0; break;
298                    case DW_TAG_structure_type:     add_type = (type_mask & eTypeClassStruct        ) != 0; break;
299                    case DW_TAG_union_type:         add_type = (type_mask & eTypeClassUnion         ) != 0; break;
300                    case DW_TAG_enumeration_type:   add_type = (type_mask & eTypeClassEnumeration   ) != 0; break;
301                    case DW_TAG_subroutine_type:
302                    case DW_TAG_subprogram:
303                    case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction      ) != 0; break;
304                    case DW_TAG_pointer_type:       add_type = (type_mask & eTypeClassPointer       ) != 0; break;
305                    case DW_TAG_rvalue_reference_type:
306                    case DW_TAG_reference_type:     add_type = (type_mask & eTypeClassReference     ) != 0; break;
307                    case DW_TAG_typedef:            add_type = (type_mask & eTypeClassTypedef       ) != 0; break;
308                    case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
309                }
310
311                if (add_type)
312                {
313                    const bool assert_not_being_parsed = true;
314                    Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
315                    if (type)
316                    {
317                        if (type_set.find(type) == type_set.end())
318                            type_set.insert(type);
319                    }
320                }
321            }
322
323            for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
324                 child_die != NULL;
325                 child_die = child_die->GetSibling())
326            {
327                GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
328            }
329        }
330    }
331}
332
333size_t
334SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
335                           uint32_t type_mask,
336                           TypeList &type_list)
337
338{
339    TypeSet type_set;
340
341    CompileUnit *comp_unit = NULL;
342    DWARFCompileUnit* dwarf_cu = NULL;
343    if (sc_scope)
344        comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
345
346    if (comp_unit)
347    {
348        dwarf_cu = GetDWARFCompileUnit(comp_unit);
349        if (dwarf_cu == 0)
350            return 0;
351        GetTypes (dwarf_cu,
352                  dwarf_cu->DIE(),
353                  dwarf_cu->GetOffset(),
354                  dwarf_cu->GetNextCompileUnitOffset(),
355                  type_mask,
356                  type_set);
357    }
358    else
359    {
360        DWARFDebugInfo* info = DebugInfo();
361        if (info)
362        {
363            const size_t num_cus = info->GetNumCompileUnits();
364            for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
365            {
366                dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
367                if (dwarf_cu)
368                {
369                    GetTypes (dwarf_cu,
370                              dwarf_cu->DIE(),
371                              0,
372                              UINT32_MAX,
373                              type_mask,
374                              type_set);
375                }
376            }
377        }
378    }
379//    if (m_using_apple_tables)
380//    {
381//        DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
382//        if (apple_types)
383//        {
384//            apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
385//
386//                for (auto die_info: die_info_array)
387//                {
388//                    bool add_type = TagMatchesTypeMask (type_mask, 0);
389//                    if (!add_type)
390//                    {
391//                        dw_tag_t tag = die_info.tag;
392//                        if (tag == 0)
393//                        {
394//                            const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
395//                            tag = die->Tag();
396//                        }
397//                        add_type = TagMatchesTypeMask (type_mask, tag);
398//                    }
399//                    if (add_type)
400//                    {
401//                        Type *type = ResolveTypeUID(die_info.offset);
402//
403//                        if (type_set.find(type) == type_set.end())
404//                            type_set.insert(type);
405//                    }
406//                }
407//                return true; // Keep iterating
408//            });
409//        }
410//    }
411//    else
412//    {
413//        if (!m_indexed)
414//            Index ();
415//
416//        m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
417//
418//            bool add_type = TagMatchesTypeMask (type_mask, 0);
419//
420//            if (!add_type)
421//            {
422//                const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
423//                if (die)
424//                {
425//                    const dw_tag_t tag = die->Tag();
426//                    add_type = TagMatchesTypeMask (type_mask, tag);
427//                }
428//            }
429//
430//            if (add_type)
431//            {
432//                Type *type = ResolveTypeUID(die_offset);
433//
434//                if (type_set.find(type) == type_set.end())
435//                    type_set.insert(type);
436//            }
437//            return true; // Keep iterating
438//        });
439//    }
440
441    std::set<ClangASTType> clang_type_set;
442    size_t num_types_added = 0;
443    for (Type *type : type_set)
444    {
445        ClangASTType clang_type = type->GetClangForwardType();
446        if (clang_type_set.find(clang_type) == clang_type_set.end())
447        {
448            clang_type_set.insert(clang_type);
449            type_list.Insert (type->shared_from_this());
450            ++num_types_added;
451        }
452    }
453    return num_types_added;
454}
455
456
457//----------------------------------------------------------------------
458// Gets the first parent that is a lexical block, function or inlined
459// subroutine, or compile unit.
460//----------------------------------------------------------------------
461static const DWARFDebugInfoEntry *
462GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
463{
464    const DWARFDebugInfoEntry *die;
465    for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
466    {
467        dw_tag_t tag = die->Tag();
468
469        switch (tag)
470        {
471        case DW_TAG_compile_unit:
472        case DW_TAG_subprogram:
473        case DW_TAG_inlined_subroutine:
474        case DW_TAG_lexical_block:
475            return die;
476        }
477    }
478    return NULL;
479}
480
481
482SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
483    SymbolFile (objfile),
484    UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
485    m_debug_map_module_wp (),
486    m_debug_map_symfile (NULL),
487    m_clang_tu_decl (NULL),
488    m_flags(),
489    m_data_debug_abbrev (),
490    m_data_debug_aranges (),
491    m_data_debug_frame (),
492    m_data_debug_info (),
493    m_data_debug_line (),
494    m_data_debug_loc (),
495    m_data_debug_ranges (),
496    m_data_debug_str (),
497    m_data_apple_names (),
498    m_data_apple_types (),
499    m_data_apple_namespaces (),
500    m_abbr(),
501    m_info(),
502    m_line(),
503    m_apple_names_ap (),
504    m_apple_types_ap (),
505    m_apple_namespaces_ap (),
506    m_apple_objc_ap (),
507    m_function_basename_index(),
508    m_function_fullname_index(),
509    m_function_method_index(),
510    m_function_selector_index(),
511    m_objc_class_selectors_index(),
512    m_global_index(),
513    m_type_index(),
514    m_namespace_index(),
515    m_indexed (false),
516    m_is_external_ast_source (false),
517    m_using_apple_tables (false),
518    m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
519    m_ranges(),
520    m_unique_ast_type_map ()
521{
522}
523
524SymbolFileDWARF::~SymbolFileDWARF()
525{
526    if (m_is_external_ast_source)
527    {
528        ModuleSP module_sp (m_obj_file->GetModule());
529        if (module_sp)
530            module_sp->GetClangASTContext().RemoveExternalSource ();
531    }
532}
533
534static const ConstString &
535GetDWARFMachOSegmentName ()
536{
537    static ConstString g_dwarf_section_name ("__DWARF");
538    return g_dwarf_section_name;
539}
540
541UniqueDWARFASTTypeMap &
542SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
543{
544    if (GetDebugMapSymfile ())
545        return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
546    return m_unique_ast_type_map;
547}
548
549ClangASTContext &
550SymbolFileDWARF::GetClangASTContext ()
551{
552    if (GetDebugMapSymfile ())
553        return m_debug_map_symfile->GetClangASTContext ();
554
555    ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
556    if (!m_is_external_ast_source)
557    {
558        m_is_external_ast_source = true;
559        llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source_ap (
560            new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
561                                                 SymbolFileDWARF::CompleteObjCInterfaceDecl,
562                                                 SymbolFileDWARF::FindExternalVisibleDeclsByName,
563                                                 SymbolFileDWARF::LayoutRecordType,
564                                                 this));
565        ast.SetExternalSource (ast_source_ap);
566    }
567    return ast;
568}
569
570void
571SymbolFileDWARF::InitializeObject()
572{
573    // Install our external AST source callbacks so we can complete Clang types.
574    ModuleSP module_sp (m_obj_file->GetModule());
575    if (module_sp)
576    {
577        const SectionList *section_list = module_sp->GetSectionList();
578
579        const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
580
581        // Memory map the DWARF mach-o segment so we have everything mmap'ed
582        // to keep our heap memory usage down.
583        if (section)
584            m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
585    }
586    get_apple_names_data();
587    if (m_data_apple_names.GetByteSize() > 0)
588    {
589        m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
590        if (m_apple_names_ap->IsValid())
591            m_using_apple_tables = true;
592        else
593            m_apple_names_ap.reset();
594    }
595    get_apple_types_data();
596    if (m_data_apple_types.GetByteSize() > 0)
597    {
598        m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
599        if (m_apple_types_ap->IsValid())
600            m_using_apple_tables = true;
601        else
602            m_apple_types_ap.reset();
603    }
604
605    get_apple_namespaces_data();
606    if (m_data_apple_namespaces.GetByteSize() > 0)
607    {
608        m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
609        if (m_apple_namespaces_ap->IsValid())
610            m_using_apple_tables = true;
611        else
612            m_apple_namespaces_ap.reset();
613    }
614
615    get_apple_objc_data();
616    if (m_data_apple_objc.GetByteSize() > 0)
617    {
618        m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
619        if (m_apple_objc_ap->IsValid())
620            m_using_apple_tables = true;
621        else
622            m_apple_objc_ap.reset();
623    }
624}
625
626bool
627SymbolFileDWARF::SupportedVersion(uint16_t version)
628{
629    return version == 2 || version == 3 || version == 4;
630}
631
632uint32_t
633SymbolFileDWARF::CalculateAbilities ()
634{
635    uint32_t abilities = 0;
636    if (m_obj_file != NULL)
637    {
638        const Section* section = NULL;
639        const SectionList *section_list = m_obj_file->GetSectionList();
640        if (section_list == NULL)
641            return 0;
642
643        uint64_t debug_abbrev_file_size = 0;
644        uint64_t debug_info_file_size = 0;
645        uint64_t debug_line_file_size = 0;
646
647        section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
648
649        if (section)
650            section_list = &section->GetChildren ();
651
652        section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
653        if (section != NULL)
654        {
655            debug_info_file_size = section->GetFileSize();
656
657            section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
658            if (section)
659                debug_abbrev_file_size = section->GetFileSize();
660            else
661                m_flags.Set (flagsGotDebugAbbrevData);
662
663            section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
664            if (!section)
665                m_flags.Set (flagsGotDebugArangesData);
666
667            section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
668            if (!section)
669                m_flags.Set (flagsGotDebugFrameData);
670
671            section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
672            if (section)
673                debug_line_file_size = section->GetFileSize();
674            else
675                m_flags.Set (flagsGotDebugLineData);
676
677            section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
678            if (!section)
679                m_flags.Set (flagsGotDebugLocData);
680
681            section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
682            if (!section)
683                m_flags.Set (flagsGotDebugMacInfoData);
684
685            section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
686            if (!section)
687                m_flags.Set (flagsGotDebugPubNamesData);
688
689            section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
690            if (!section)
691                m_flags.Set (flagsGotDebugPubTypesData);
692
693            section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
694            if (!section)
695                m_flags.Set (flagsGotDebugRangesData);
696
697            section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
698            if (!section)
699                m_flags.Set (flagsGotDebugStrData);
700        }
701        else
702        {
703            const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
704            if (symfile_dir_cstr)
705            {
706                if (strcasestr(symfile_dir_cstr, ".dsym"))
707                {
708                    if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
709                    {
710                        // We have a dSYM file that didn't have a any debug info.
711                        // If the string table has a size of 1, then it was made from
712                        // an executable with no debug info, or from an executable that
713                        // was stripped.
714                        section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
715                        if (section && section->GetFileSize() == 1)
716                        {
717                            m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
718                        }
719                    }
720                }
721            }
722        }
723
724        if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
725            abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
726
727        if (debug_line_file_size > 0)
728            abilities |= LineTables;
729    }
730    return abilities;
731}
732
733const DWARFDataExtractor&
734SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
735{
736    if (m_flags.IsClear (got_flag))
737    {
738        ModuleSP module_sp (m_obj_file->GetModule());
739        m_flags.Set (got_flag);
740        const SectionList *section_list = module_sp->GetSectionList();
741        if (section_list)
742        {
743            SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
744            if (section_sp)
745            {
746                // See if we memory mapped the DWARF segment?
747                if (m_dwarf_data.GetByteSize())
748                {
749                    data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
750                }
751                else
752                {
753                    if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
754                        data.Clear();
755                }
756            }
757        }
758    }
759    return data;
760}
761
762const DWARFDataExtractor&
763SymbolFileDWARF::get_debug_abbrev_data()
764{
765    return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
766}
767
768const DWARFDataExtractor&
769SymbolFileDWARF::get_debug_aranges_data()
770{
771    return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
772}
773
774const DWARFDataExtractor&
775SymbolFileDWARF::get_debug_frame_data()
776{
777    return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
778}
779
780const DWARFDataExtractor&
781SymbolFileDWARF::get_debug_info_data()
782{
783    return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
784}
785
786const DWARFDataExtractor&
787SymbolFileDWARF::get_debug_line_data()
788{
789    return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
790}
791
792const DWARFDataExtractor&
793SymbolFileDWARF::get_debug_loc_data()
794{
795    return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
796}
797
798const DWARFDataExtractor&
799SymbolFileDWARF::get_debug_ranges_data()
800{
801    return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
802}
803
804const DWARFDataExtractor&
805SymbolFileDWARF::get_debug_str_data()
806{
807    return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
808}
809
810const DWARFDataExtractor&
811SymbolFileDWARF::get_apple_names_data()
812{
813    return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
814}
815
816const DWARFDataExtractor&
817SymbolFileDWARF::get_apple_types_data()
818{
819    return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
820}
821
822const DWARFDataExtractor&
823SymbolFileDWARF::get_apple_namespaces_data()
824{
825    return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
826}
827
828const DWARFDataExtractor&
829SymbolFileDWARF::get_apple_objc_data()
830{
831    return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
832}
833
834
835DWARFDebugAbbrev*
836SymbolFileDWARF::DebugAbbrev()
837{
838    if (m_abbr.get() == NULL)
839    {
840        const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
841        if (debug_abbrev_data.GetByteSize() > 0)
842        {
843            m_abbr.reset(new DWARFDebugAbbrev());
844            if (m_abbr.get())
845                m_abbr->Parse(debug_abbrev_data);
846        }
847    }
848    return m_abbr.get();
849}
850
851const DWARFDebugAbbrev*
852SymbolFileDWARF::DebugAbbrev() const
853{
854    return m_abbr.get();
855}
856
857
858DWARFDebugInfo*
859SymbolFileDWARF::DebugInfo()
860{
861    if (m_info.get() == NULL)
862    {
863        Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
864                           __PRETTY_FUNCTION__, static_cast<void*>(this));
865        if (get_debug_info_data().GetByteSize() > 0)
866        {
867            m_info.reset(new DWARFDebugInfo());
868            if (m_info.get())
869            {
870                m_info->SetDwarfData(this);
871            }
872        }
873    }
874    return m_info.get();
875}
876
877const DWARFDebugInfo*
878SymbolFileDWARF::DebugInfo() const
879{
880    return m_info.get();
881}
882
883DWARFCompileUnit*
884SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
885{
886    DWARFDebugInfo* info = DebugInfo();
887    if (info)
888    {
889        if (GetDebugMapSymfile ())
890        {
891            // The debug map symbol file made the compile units for this DWARF
892            // file which is .o file with DWARF in it, and we should have
893            // only 1 compile unit which is at offset zero in the DWARF.
894            // TODO: modify to support LTO .o files where each .o file might
895            // have multiple DW_TAG_compile_unit tags.
896            return info->GetCompileUnit(0).get();
897        }
898        else
899        {
900            // Just a normal DWARF file whose user ID for the compile unit is
901            // the DWARF offset itself
902            return info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
903        }
904    }
905    return NULL;
906}
907
908
909DWARFDebugRanges*
910SymbolFileDWARF::DebugRanges()
911{
912    if (m_ranges.get() == NULL)
913    {
914        Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
915                           __PRETTY_FUNCTION__, static_cast<void*>(this));
916        if (get_debug_ranges_data().GetByteSize() > 0)
917        {
918            m_ranges.reset(new DWARFDebugRanges());
919            if (m_ranges.get())
920                m_ranges->Extract(this);
921        }
922    }
923    return m_ranges.get();
924}
925
926const DWARFDebugRanges*
927SymbolFileDWARF::DebugRanges() const
928{
929    return m_ranges.get();
930}
931
932lldb::CompUnitSP
933SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
934{
935    CompUnitSP cu_sp;
936    if (dwarf_cu)
937    {
938        CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
939        if (comp_unit)
940        {
941            // We already parsed this compile unit, had out a shared pointer to it
942            cu_sp = comp_unit->shared_from_this();
943        }
944        else
945        {
946            if (GetDebugMapSymfile ())
947            {
948                // Let the debug map create the compile unit
949                cu_sp = m_debug_map_symfile->GetCompileUnit(this);
950                dwarf_cu->SetUserData(cu_sp.get());
951            }
952            else
953            {
954                ModuleSP module_sp (m_obj_file->GetModule());
955                if (module_sp)
956                {
957                    const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
958                    if (cu_die)
959                    {
960                        const char * cu_die_name = cu_die->GetName(this, dwarf_cu);
961                        const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
962                        LanguageType cu_language = (LanguageType)cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
963                        if (cu_die_name)
964                        {
965                            std::string ramapped_file;
966                            FileSpec cu_file_spec;
967
968                            if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
969                            {
970                                // If we have a full path to the compile unit, we don't need to resolve
971                                // the file.  This can be expensive e.g. when the source files are NFS mounted.
972                                if (module_sp->RemapSourceFile(cu_die_name, ramapped_file))
973                                    cu_file_spec.SetFile (ramapped_file.c_str(), false);
974                                else
975                                    cu_file_spec.SetFile (cu_die_name, false);
976                            }
977                            else
978                            {
979                                // DWARF2/3 suggests the form hostname:pathname for compilation directory.
980                                // Remove the host part if present.
981                                cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
982                                std::string fullpath(cu_comp_dir);
983
984                                if (*fullpath.rbegin() != '/')
985                                    fullpath += '/';
986                                fullpath += cu_die_name;
987                                if (module_sp->RemapSourceFile (fullpath.c_str(), ramapped_file))
988                                    cu_file_spec.SetFile (ramapped_file.c_str(), false);
989                                else
990                                    cu_file_spec.SetFile (fullpath.c_str(), false);
991                            }
992
993                            cu_sp.reset(new CompileUnit (module_sp,
994                                                         dwarf_cu,
995                                                         cu_file_spec,
996                                                         MakeUserID(dwarf_cu->GetOffset()),
997                                                         cu_language));
998                            if (cu_sp)
999                            {
1000                                dwarf_cu->SetUserData(cu_sp.get());
1001
1002                                // Figure out the compile unit index if we weren't given one
1003                                if (cu_idx == UINT32_MAX)
1004                                    DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
1005
1006                                m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
1007                            }
1008                        }
1009                    }
1010                }
1011            }
1012        }
1013    }
1014    return cu_sp;
1015}
1016
1017uint32_t
1018SymbolFileDWARF::GetNumCompileUnits()
1019{
1020    DWARFDebugInfo* info = DebugInfo();
1021    if (info)
1022        return info->GetNumCompileUnits();
1023    return 0;
1024}
1025
1026CompUnitSP
1027SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
1028{
1029    CompUnitSP cu_sp;
1030    DWARFDebugInfo* info = DebugInfo();
1031    if (info)
1032    {
1033        DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
1034        if (dwarf_cu)
1035            cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
1036    }
1037    return cu_sp;
1038}
1039
1040static void
1041AddRangesToBlock (Block& block,
1042                  DWARFDebugRanges::RangeList& ranges,
1043                  addr_t block_base_addr)
1044{
1045    const size_t num_ranges = ranges.GetSize();
1046    for (size_t i = 0; i<num_ranges; ++i)
1047    {
1048        const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
1049        const addr_t range_base = range.GetRangeBase();
1050        assert (range_base >= block_base_addr);
1051        block.AddRange(Block::Range (range_base - block_base_addr, range.GetByteSize()));;
1052    }
1053    block.FinalizeRanges ();
1054}
1055
1056
1057Function *
1058SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
1059{
1060    DWARFDebugRanges::RangeList func_ranges;
1061    const char *name = NULL;
1062    const char *mangled = NULL;
1063    int decl_file = 0;
1064    int decl_line = 0;
1065    int decl_column = 0;
1066    int call_file = 0;
1067    int call_line = 0;
1068    int call_column = 0;
1069    DWARFExpression frame_base;
1070
1071    assert (die->Tag() == DW_TAG_subprogram);
1072
1073    if (die->Tag() != DW_TAG_subprogram)
1074        return NULL;
1075
1076    if (die->GetDIENamesAndRanges (this,
1077                                   dwarf_cu,
1078                                   name,
1079                                   mangled,
1080                                   func_ranges,
1081                                   decl_file,
1082                                   decl_line,
1083                                   decl_column,
1084                                   call_file,
1085                                   call_line,
1086                                   call_column,
1087                                   &frame_base))
1088    {
1089        // Union of all ranges in the function DIE (if the function is discontiguous)
1090        AddressRange func_range;
1091        lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
1092        lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
1093        if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
1094        {
1095            ModuleSP module_sp (m_obj_file->GetModule());
1096            func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
1097            if (func_range.GetBaseAddress().IsValid())
1098                func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1099        }
1100
1101        if (func_range.GetBaseAddress().IsValid())
1102        {
1103            Mangled func_name;
1104            if (mangled)
1105                func_name.SetValue(ConstString(mangled), true);
1106            else if (name)
1107                func_name.SetValue(ConstString(name), false);
1108
1109            FunctionSP func_sp;
1110            std::unique_ptr<Declaration> decl_ap;
1111            if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1112                decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1113                                               decl_line,
1114                                               decl_column));
1115
1116            // Supply the type _only_ if it has already been parsed
1117            Type *func_type = m_die_to_type.lookup (die);
1118
1119            assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1120
1121            if (FixupAddress (func_range.GetBaseAddress()))
1122            {
1123                const user_id_t func_user_id = MakeUserID(die->GetOffset());
1124                func_sp.reset(new Function (sc.comp_unit,
1125                                            MakeUserID(func_user_id),       // UserID is the DIE offset
1126                                            MakeUserID(func_user_id),
1127                                            func_name,
1128                                            func_type,
1129                                            func_range));           // first address range
1130
1131                if (func_sp.get() != NULL)
1132                {
1133                    if (frame_base.IsValid())
1134                        func_sp->GetFrameBaseExpression() = frame_base;
1135                    sc.comp_unit->AddFunction(func_sp);
1136                    return func_sp.get();
1137                }
1138            }
1139        }
1140    }
1141    return NULL;
1142}
1143
1144bool
1145SymbolFileDWARF::FixupAddress (Address &addr)
1146{
1147    SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1148    if (debug_map_symfile)
1149    {
1150        return debug_map_symfile->LinkOSOAddress(addr);
1151    }
1152    // This is a normal DWARF file, no address fixups need to happen
1153    return true;
1154}
1155lldb::LanguageType
1156SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1157{
1158    assert (sc.comp_unit);
1159    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1160    if (dwarf_cu)
1161    {
1162        const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1163        if (die)
1164        {
1165            const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
1166            if (language)
1167                return (lldb::LanguageType)language;
1168        }
1169    }
1170    return eLanguageTypeUnknown;
1171}
1172
1173size_t
1174SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1175{
1176    assert (sc.comp_unit);
1177    size_t functions_added = 0;
1178    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1179    if (dwarf_cu)
1180    {
1181        DWARFDIECollection function_dies;
1182        const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1183        size_t func_idx;
1184        for (func_idx = 0; func_idx < num_functions; ++func_idx)
1185        {
1186            const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1187            if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1188            {
1189                if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1190                    ++functions_added;
1191            }
1192        }
1193        //FixupTypes();
1194    }
1195    return functions_added;
1196}
1197
1198bool
1199SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1200{
1201    assert (sc.comp_unit);
1202    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1203    if (dwarf_cu)
1204    {
1205        const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1206
1207        if (cu_die)
1208        {
1209            const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1210
1211            // DWARF2/3 suggests the form hostname:pathname for compilation directory.
1212            // Remove the host part if present.
1213            cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
1214
1215            dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1216
1217            // All file indexes in DWARF are one based and a file of index zero is
1218            // supposed to be the compile unit itself.
1219            support_files.Append (*sc.comp_unit);
1220
1221            return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1222        }
1223    }
1224    return false;
1225}
1226
1227struct ParseDWARFLineTableCallbackInfo
1228{
1229    LineTable* line_table;
1230    std::unique_ptr<LineSequence> sequence_ap;
1231};
1232
1233//----------------------------------------------------------------------
1234// ParseStatementTableCallback
1235//----------------------------------------------------------------------
1236static void
1237ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1238{
1239    if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1240    {
1241        // Just started parsing the line table
1242    }
1243    else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1244    {
1245        // Done parsing line table, nothing to do for the cleanup
1246    }
1247    else
1248    {
1249        ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1250        LineTable* line_table = info->line_table;
1251
1252        // If this is our first time here, we need to create a
1253        // sequence container.
1254        if (!info->sequence_ap.get())
1255        {
1256            info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1257            assert(info->sequence_ap.get());
1258        }
1259        line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1260                                               state.address,
1261                                               state.line,
1262                                               state.column,
1263                                               state.file,
1264                                               state.is_stmt,
1265                                               state.basic_block,
1266                                               state.prologue_end,
1267                                               state.epilogue_begin,
1268                                               state.end_sequence);
1269        if (state.end_sequence)
1270        {
1271            // First, put the current sequence into the line table.
1272            line_table->InsertSequence(info->sequence_ap.get());
1273            // Then, empty it to prepare for the next sequence.
1274            info->sequence_ap->Clear();
1275        }
1276    }
1277}
1278
1279bool
1280SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1281{
1282    assert (sc.comp_unit);
1283    if (sc.comp_unit->GetLineTable() != NULL)
1284        return true;
1285
1286    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1287    if (dwarf_cu)
1288    {
1289        const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1290        if (dwarf_cu_die)
1291        {
1292            const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1293            if (cu_line_offset != DW_INVALID_OFFSET)
1294            {
1295                std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1296                if (line_table_ap.get())
1297                {
1298                    ParseDWARFLineTableCallbackInfo info;
1299                    info.line_table = line_table_ap.get();
1300                    lldb::offset_t offset = cu_line_offset;
1301                    DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1302                    if (m_debug_map_symfile)
1303                    {
1304                        // We have an object file that has a line table with addresses
1305                        // that are not linked. We need to link the line table and convert
1306                        // the addresses that are relative to the .o file into addresses
1307                        // for the main executable.
1308                        sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1309                    }
1310                    else
1311                    {
1312                        sc.comp_unit->SetLineTable(line_table_ap.release());
1313                        return true;
1314                    }
1315                }
1316            }
1317        }
1318    }
1319    return false;
1320}
1321
1322size_t
1323SymbolFileDWARF::ParseFunctionBlocks
1324(
1325    const SymbolContext& sc,
1326    Block *parent_block,
1327    DWARFCompileUnit* dwarf_cu,
1328    const DWARFDebugInfoEntry *die,
1329    addr_t subprogram_low_pc,
1330    uint32_t depth
1331)
1332{
1333    size_t blocks_added = 0;
1334    while (die != NULL)
1335    {
1336        dw_tag_t tag = die->Tag();
1337
1338        switch (tag)
1339        {
1340        case DW_TAG_inlined_subroutine:
1341        case DW_TAG_subprogram:
1342        case DW_TAG_lexical_block:
1343            {
1344                Block *block = NULL;
1345                if (tag == DW_TAG_subprogram)
1346                {
1347                    // Skip any DW_TAG_subprogram DIEs that are inside
1348                    // of a normal or inlined functions. These will be
1349                    // parsed on their own as separate entities.
1350
1351                    if (depth > 0)
1352                        break;
1353
1354                    block = parent_block;
1355                }
1356                else
1357                {
1358                    BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1359                    parent_block->AddChild(block_sp);
1360                    block = block_sp.get();
1361                }
1362                DWARFDebugRanges::RangeList ranges;
1363                const char *name = NULL;
1364                const char *mangled_name = NULL;
1365
1366                int decl_file = 0;
1367                int decl_line = 0;
1368                int decl_column = 0;
1369                int call_file = 0;
1370                int call_line = 0;
1371                int call_column = 0;
1372                if (die->GetDIENamesAndRanges (this,
1373                                               dwarf_cu,
1374                                               name,
1375                                               mangled_name,
1376                                               ranges,
1377                                               decl_file, decl_line, decl_column,
1378                                               call_file, call_line, call_column))
1379                {
1380                    if (tag == DW_TAG_subprogram)
1381                    {
1382                        assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1383                        subprogram_low_pc = ranges.GetMinRangeBase(0);
1384                    }
1385                    else if (tag == DW_TAG_inlined_subroutine)
1386                    {
1387                        // We get called here for inlined subroutines in two ways.
1388                        // The first time is when we are making the Function object
1389                        // for this inlined concrete instance.  Since we're creating a top level block at
1390                        // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1391                        // adjust the containing address.
1392                        // The second time is when we are parsing the blocks inside the function that contains
1393                        // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1394                        // function the offset will be for that function.
1395                        if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1396                        {
1397                            subprogram_low_pc = ranges.GetMinRangeBase(0);
1398                        }
1399                    }
1400
1401                    AddRangesToBlock (*block, ranges, subprogram_low_pc);
1402
1403                    if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1404                    {
1405                        std::unique_ptr<Declaration> decl_ap;
1406                        if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1407                            decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1408                                                          decl_line, decl_column));
1409
1410                        std::unique_ptr<Declaration> call_ap;
1411                        if (call_file != 0 || call_line != 0 || call_column != 0)
1412                            call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1413                                                          call_line, call_column));
1414
1415                        block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1416                    }
1417
1418                    ++blocks_added;
1419
1420                    if (die->HasChildren())
1421                    {
1422                        blocks_added += ParseFunctionBlocks (sc,
1423                                                             block,
1424                                                             dwarf_cu,
1425                                                             die->GetFirstChild(),
1426                                                             subprogram_low_pc,
1427                                                             depth + 1);
1428                    }
1429                }
1430            }
1431            break;
1432        default:
1433            break;
1434        }
1435
1436        // Only parse siblings of the block if we are not at depth zero. A depth
1437        // of zero indicates we are currently parsing the top level
1438        // DW_TAG_subprogram DIE
1439
1440        if (depth == 0)
1441            die = NULL;
1442        else
1443            die = die->GetSibling();
1444    }
1445    return blocks_added;
1446}
1447
1448bool
1449SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1450                                   const DWARFDebugInfoEntry *die,
1451                                   ClangASTContext::TemplateParameterInfos &template_param_infos)
1452{
1453    const dw_tag_t tag = die->Tag();
1454
1455    switch (tag)
1456    {
1457    case DW_TAG_template_type_parameter:
1458    case DW_TAG_template_value_parameter:
1459        {
1460            const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1461
1462            DWARFDebugInfoEntry::Attributes attributes;
1463            const size_t num_attributes = die->GetAttributes (this,
1464                                                              dwarf_cu,
1465                                                              fixed_form_sizes,
1466                                                              attributes);
1467            const char *name = NULL;
1468            Type *lldb_type = NULL;
1469            ClangASTType clang_type;
1470            uint64_t uval64 = 0;
1471            bool uval64_valid = false;
1472            if (num_attributes > 0)
1473            {
1474                DWARFFormValue form_value;
1475                for (size_t i=0; i<num_attributes; ++i)
1476                {
1477                    const dw_attr_t attr = attributes.AttributeAtIndex(i);
1478
1479                    switch (attr)
1480                    {
1481                        case DW_AT_name:
1482                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1483                                name = form_value.AsCString(&get_debug_str_data());
1484                            break;
1485
1486                        case DW_AT_type:
1487                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1488                            {
1489                                const dw_offset_t type_die_offset = form_value.Reference(dwarf_cu);
1490                                lldb_type = ResolveTypeUID(type_die_offset);
1491                                if (lldb_type)
1492                                    clang_type = lldb_type->GetClangForwardType();
1493                            }
1494                            break;
1495
1496                        case DW_AT_const_value:
1497                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1498                            {
1499                                uval64_valid = true;
1500                                uval64 = form_value.Unsigned();
1501                            }
1502                            break;
1503                        default:
1504                            break;
1505                    }
1506                }
1507
1508                clang::ASTContext *ast = GetClangASTContext().getASTContext();
1509                if (!clang_type)
1510                    clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1511
1512                if (clang_type)
1513                {
1514                    bool is_signed = false;
1515                    if (name && name[0])
1516                        template_param_infos.names.push_back(name);
1517                    else
1518                        template_param_infos.names.push_back(NULL);
1519
1520                    if (tag == DW_TAG_template_value_parameter &&
1521                        lldb_type != NULL &&
1522                        clang_type.IsIntegerType (is_signed) &&
1523                        uval64_valid)
1524                    {
1525                        llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1526                        template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1527                                                                                      llvm::APSInt(apint),
1528                                                                                      clang_type.GetQualType()));
1529                    }
1530                    else
1531                    {
1532                        template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1533                    }
1534                }
1535                else
1536                {
1537                    return false;
1538                }
1539
1540            }
1541        }
1542        return true;
1543
1544    default:
1545        break;
1546    }
1547    return false;
1548}
1549
1550bool
1551SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1552                                              const DWARFDebugInfoEntry *parent_die,
1553                                              ClangASTContext::TemplateParameterInfos &template_param_infos)
1554{
1555
1556    if (parent_die == NULL)
1557        return false;
1558
1559    Args template_parameter_names;
1560    for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1561         die != NULL;
1562         die = die->GetSibling())
1563    {
1564        const dw_tag_t tag = die->Tag();
1565
1566        switch (tag)
1567        {
1568            case DW_TAG_template_type_parameter:
1569            case DW_TAG_template_value_parameter:
1570                ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1571            break;
1572
1573        default:
1574            break;
1575        }
1576    }
1577    if (template_param_infos.args.empty())
1578        return false;
1579    return template_param_infos.args.size() == template_param_infos.names.size();
1580}
1581
1582clang::ClassTemplateDecl *
1583SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1584                                         lldb::AccessType access_type,
1585                                         const char *parent_name,
1586                                         int tag_decl_kind,
1587                                         const ClangASTContext::TemplateParameterInfos &template_param_infos)
1588{
1589    if (template_param_infos.IsValid())
1590    {
1591        std::string template_basename(parent_name);
1592        template_basename.erase (template_basename.find('<'));
1593        ClangASTContext &ast = GetClangASTContext();
1594
1595        return ast.CreateClassTemplateDecl (decl_ctx,
1596                                            access_type,
1597                                            template_basename.c_str(),
1598                                            tag_decl_kind,
1599                                            template_param_infos);
1600    }
1601    return NULL;
1602}
1603
1604class SymbolFileDWARF::DelayedAddObjCClassProperty
1605{
1606public:
1607    DelayedAddObjCClassProperty
1608    (
1609        const ClangASTType     &class_opaque_type,
1610        const char             *property_name,
1611        const ClangASTType     &property_opaque_type,  // The property type is only required if you don't have an ivar decl
1612        clang::ObjCIvarDecl    *ivar_decl,
1613        const char             *property_setter_name,
1614        const char             *property_getter_name,
1615        uint32_t                property_attributes,
1616        const ClangASTMetadata *metadata
1617    ) :
1618        m_class_opaque_type     (class_opaque_type),
1619        m_property_name         (property_name),
1620        m_property_opaque_type  (property_opaque_type),
1621        m_ivar_decl             (ivar_decl),
1622        m_property_setter_name  (property_setter_name),
1623        m_property_getter_name  (property_getter_name),
1624        m_property_attributes   (property_attributes)
1625    {
1626        if (metadata != NULL)
1627        {
1628            m_metadata_ap.reset(new ClangASTMetadata());
1629            *m_metadata_ap = *metadata;
1630        }
1631    }
1632
1633    DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1634    {
1635        *this = rhs;
1636    }
1637
1638    DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1639    {
1640        m_class_opaque_type    = rhs.m_class_opaque_type;
1641        m_property_name        = rhs.m_property_name;
1642        m_property_opaque_type = rhs.m_property_opaque_type;
1643        m_ivar_decl            = rhs.m_ivar_decl;
1644        m_property_setter_name = rhs.m_property_setter_name;
1645        m_property_getter_name = rhs.m_property_getter_name;
1646        m_property_attributes  = rhs.m_property_attributes;
1647
1648        if (rhs.m_metadata_ap.get())
1649        {
1650            m_metadata_ap.reset (new ClangASTMetadata());
1651            *m_metadata_ap = *rhs.m_metadata_ap;
1652        }
1653        return *this;
1654    }
1655
1656    bool
1657    Finalize()
1658    {
1659        return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1660                                                         m_property_opaque_type,
1661                                                         m_ivar_decl,
1662                                                         m_property_setter_name,
1663                                                         m_property_getter_name,
1664                                                         m_property_attributes,
1665                                                         m_metadata_ap.get());
1666    }
1667private:
1668    ClangASTType            m_class_opaque_type;
1669    const char             *m_property_name;
1670    ClangASTType            m_property_opaque_type;
1671    clang::ObjCIvarDecl    *m_ivar_decl;
1672    const char             *m_property_setter_name;
1673    const char             *m_property_getter_name;
1674    uint32_t                m_property_attributes;
1675    std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1676};
1677
1678struct BitfieldInfo
1679{
1680    uint64_t bit_size;
1681    uint64_t bit_offset;
1682
1683    BitfieldInfo () :
1684        bit_size (LLDB_INVALID_ADDRESS),
1685        bit_offset (LLDB_INVALID_ADDRESS)
1686    {
1687    }
1688
1689    void
1690    Clear()
1691    {
1692        bit_size = LLDB_INVALID_ADDRESS;
1693        bit_offset = LLDB_INVALID_ADDRESS;
1694    }
1695
1696    bool IsValid ()
1697    {
1698        return (bit_size != LLDB_INVALID_ADDRESS) &&
1699               (bit_offset != LLDB_INVALID_ADDRESS);
1700    }
1701};
1702
1703
1704bool
1705SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1706                                         const DWARFDebugInfoEntry *parent_die)
1707{
1708    if (parent_die)
1709    {
1710        for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1711        {
1712            dw_tag_t tag = die->Tag();
1713            bool check_virtuality = false;
1714            switch (tag)
1715            {
1716                case DW_TAG_inheritance:
1717                case DW_TAG_subprogram:
1718                    check_virtuality = true;
1719                    break;
1720                default:
1721                    break;
1722            }
1723            if (check_virtuality)
1724            {
1725                if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1726                    return true;
1727            }
1728        }
1729    }
1730    return false;
1731}
1732
1733size_t
1734SymbolFileDWARF::ParseChildMembers
1735(
1736    const SymbolContext& sc,
1737    DWARFCompileUnit* dwarf_cu,
1738    const DWARFDebugInfoEntry *parent_die,
1739    ClangASTType &class_clang_type,
1740    const LanguageType class_language,
1741    std::vector<clang::CXXBaseSpecifier *>& base_classes,
1742    std::vector<int>& member_accessibilities,
1743    DWARFDIECollection& member_function_dies,
1744    DelayedPropertyList& delayed_properties,
1745    AccessType& default_accessibility,
1746    bool &is_a_class,
1747    LayoutInfo &layout_info
1748)
1749{
1750    if (parent_die == NULL)
1751        return 0;
1752
1753    size_t count = 0;
1754    const DWARFDebugInfoEntry *die;
1755    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1756    uint32_t member_idx = 0;
1757    BitfieldInfo last_field_info;
1758    ModuleSP module = GetObjectFile()->GetModule();
1759
1760    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1761    {
1762        dw_tag_t tag = die->Tag();
1763
1764        switch (tag)
1765        {
1766        case DW_TAG_member:
1767        case DW_TAG_APPLE_property:
1768            {
1769                DWARFDebugInfoEntry::Attributes attributes;
1770                const size_t num_attributes = die->GetAttributes (this,
1771                                                                  dwarf_cu,
1772                                                                  fixed_form_sizes,
1773                                                                  attributes);
1774                if (num_attributes > 0)
1775                {
1776                    Declaration decl;
1777                    //DWARFExpression location;
1778                    const char *name = NULL;
1779                    const char *prop_name = NULL;
1780                    const char *prop_getter_name = NULL;
1781                    const char *prop_setter_name = NULL;
1782                    uint32_t prop_attributes = 0;
1783
1784
1785                    bool is_artificial = false;
1786                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1787                    AccessType accessibility = eAccessNone;
1788                    uint32_t member_byte_offset = UINT32_MAX;
1789                    size_t byte_size = 0;
1790                    size_t bit_offset = 0;
1791                    size_t bit_size = 0;
1792                    bool is_external = false; // On DW_TAG_members, this means the member is static
1793                    uint32_t i;
1794                    for (i=0; i<num_attributes && !is_artificial; ++i)
1795                    {
1796                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
1797                        DWARFFormValue form_value;
1798                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1799                        {
1800                            switch (attr)
1801                            {
1802                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1803                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1804                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1805                            case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1806                            case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
1807                            case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1808                            case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1809                            case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1810                            case DW_AT_data_member_location:
1811                                if (form_value.BlockData())
1812                                {
1813                                    Value initialValue(0);
1814                                    Value memberOffset(0);
1815                                    const DWARFDataExtractor& debug_info_data = get_debug_info_data();
1816                                    uint32_t block_length = form_value.Unsigned();
1817                                    uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1818                                    if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1819                                                                  NULL, // ClangExpressionVariableList *
1820                                                                  NULL, // ClangExpressionDeclMap *
1821                                                                  NULL, // RegisterContext *
1822                                                                  module,
1823                                                                  debug_info_data,
1824                                                                  block_offset,
1825                                                                  block_length,
1826                                                                  eRegisterKindDWARF,
1827                                                                  &initialValue,
1828                                                                  memberOffset,
1829                                                                  NULL))
1830                                    {
1831                                        member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1832                                    }
1833                                }
1834                                else
1835                                {
1836                                    // With DWARF 3 and later, if the value is an integer constant,
1837                                    // this form value is the offset in bytes from the beginning
1838                                    // of the containing entity.
1839                                    member_byte_offset = form_value.Unsigned();
1840                                }
1841                                break;
1842
1843                            case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1844                            case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1845                            case DW_AT_APPLE_property_name:      prop_name = form_value.AsCString(&get_debug_str_data()); break;
1846                            case DW_AT_APPLE_property_getter:    prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1847                            case DW_AT_APPLE_property_setter:    prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1848                            case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1849                            case DW_AT_external:                 is_external = form_value.Boolean(); break;
1850
1851                            default:
1852                            case DW_AT_declaration:
1853                            case DW_AT_description:
1854                            case DW_AT_mutable:
1855                            case DW_AT_visibility:
1856                            case DW_AT_sibling:
1857                                break;
1858                            }
1859                        }
1860                    }
1861
1862                    if (prop_name)
1863                    {
1864                        ConstString fixed_getter;
1865                        ConstString fixed_setter;
1866
1867                        // Check if the property getter/setter were provided as full
1868                        // names.  We want basenames, so we extract them.
1869
1870                        if (prop_getter_name && prop_getter_name[0] == '-')
1871                        {
1872                            ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1873                            prop_getter_name = prop_getter_method.GetSelector().GetCString();
1874                        }
1875
1876                        if (prop_setter_name && prop_setter_name[0] == '-')
1877                        {
1878                            ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1879                            prop_setter_name = prop_setter_method.GetSelector().GetCString();
1880                        }
1881
1882                        // If the names haven't been provided, they need to be
1883                        // filled in.
1884
1885                        if (!prop_getter_name)
1886                        {
1887                            prop_getter_name = prop_name;
1888                        }
1889                        if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1890                        {
1891                            StreamString ss;
1892
1893                            ss.Printf("set%c%s:",
1894                                      toupper(prop_name[0]),
1895                                      &prop_name[1]);
1896
1897                            fixed_setter.SetCString(ss.GetData());
1898                            prop_setter_name = fixed_setter.GetCString();
1899                        }
1900                    }
1901
1902                    // Clang has a DWARF generation bug where sometimes it
1903                    // represents fields that are references with bad byte size
1904                    // and bit size/offset information such as:
1905                    //
1906                    //  DW_AT_byte_size( 0x00 )
1907                    //  DW_AT_bit_size( 0x40 )
1908                    //  DW_AT_bit_offset( 0xffffffffffffffc0 )
1909                    //
1910                    // So check the bit offset to make sure it is sane, and if
1911                    // the values are not sane, remove them. If we don't do this
1912                    // then we will end up with a crash if we try to use this
1913                    // type in an expression when clang becomes unhappy with its
1914                    // recycled debug info.
1915
1916                    if (bit_offset > 128)
1917                    {
1918                        bit_size = 0;
1919                        bit_offset = 0;
1920                    }
1921
1922                    // FIXME: Make Clang ignore Objective-C accessibility for expressions
1923                    if (class_language == eLanguageTypeObjC ||
1924                        class_language == eLanguageTypeObjC_plus_plus)
1925                        accessibility = eAccessNone;
1926
1927                    if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
1928                    {
1929                        // Not all compilers will mark the vtable pointer
1930                        // member as artificial (llvm-gcc). We can't have
1931                        // the virtual members in our classes otherwise it
1932                        // throws off all child offsets since we end up
1933                        // having and extra pointer sized member in our
1934                        // class layouts.
1935                        is_artificial = true;
1936                    }
1937
1938                    // Handle static members
1939                    if (is_external && member_byte_offset == UINT32_MAX)
1940                    {
1941                        Type *var_type = ResolveTypeUID(encoding_uid);
1942
1943                        if (var_type)
1944                        {
1945                            if (accessibility == eAccessNone)
1946                                accessibility = eAccessPublic;
1947                            class_clang_type.AddVariableToRecordType (name,
1948                                                                      var_type->GetClangLayoutType(),
1949                                                                      accessibility);
1950                        }
1951                        break;
1952                    }
1953
1954                    if (is_artificial == false)
1955                    {
1956                        Type *member_type = ResolveTypeUID(encoding_uid);
1957
1958                        clang::FieldDecl *field_decl = NULL;
1959                        if (tag == DW_TAG_member)
1960                        {
1961                            if (member_type)
1962                            {
1963                                if (accessibility == eAccessNone)
1964                                    accessibility = default_accessibility;
1965                                member_accessibilities.push_back(accessibility);
1966
1967                                uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
1968                                if (bit_size > 0)
1969                                {
1970
1971                                    BitfieldInfo this_field_info;
1972                                    this_field_info.bit_offset = field_bit_offset;
1973                                    this_field_info.bit_size = bit_size;
1974
1975                                    /////////////////////////////////////////////////////////////
1976                                    // How to locate a field given the DWARF debug information
1977                                    //
1978                                    // AT_byte_size indicates the size of the word in which the
1979                                    // bit offset must be interpreted.
1980                                    //
1981                                    // AT_data_member_location indicates the byte offset of the
1982                                    // word from the base address of the structure.
1983                                    //
1984                                    // AT_bit_offset indicates how many bits into the word
1985                                    // (according to the host endianness) the low-order bit of
1986                                    // the field starts.  AT_bit_offset can be negative.
1987                                    //
1988                                    // AT_bit_size indicates the size of the field in bits.
1989                                    /////////////////////////////////////////////////////////////
1990
1991                                    if (byte_size == 0)
1992                                        byte_size = member_type->GetByteSize();
1993
1994                                    if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
1995                                    {
1996                                        this_field_info.bit_offset += byte_size * 8;
1997                                        this_field_info.bit_offset -= (bit_offset + bit_size);
1998                                    }
1999                                    else
2000                                    {
2001                                        this_field_info.bit_offset += bit_offset;
2002                                    }
2003
2004                                    // Update the field bit offset we will report for layout
2005                                    field_bit_offset = this_field_info.bit_offset;
2006
2007                                    // If the member to be emitted did not start on a character boundary and there is
2008                                    // empty space between the last field and this one, then we need to emit an
2009                                    // anonymous member filling up the space up to its start.  There are three cases
2010                                    // here:
2011                                    //
2012                                    // 1 If the previous member ended on a character boundary, then we can emit an
2013                                    //   anonymous member starting at the most recent character boundary.
2014                                    //
2015                                    // 2 If the previous member did not end on a character boundary and the distance
2016                                    //   from the end of the previous member to the current member is less than a
2017                                    //   word width, then we can emit an anonymous member starting right after the
2018                                    //   previous member and right before this member.
2019                                    //
2020                                    // 3 If the previous member did not end on a character boundary and the distance
2021                                    //   from the end of the previous member to the current member is greater than
2022                                    //   or equal a word width, then we act as in Case 1.
2023
2024                                    const uint64_t character_width = 8;
2025                                    const uint64_t word_width = 32;
2026
2027                                    // Objective-C has invalid DW_AT_bit_offset values in older versions
2028                                    // of clang, so we have to be careful and only insert unnamed bitfields
2029                                    // if we have a new enough clang.
2030                                    bool detect_unnamed_bitfields = true;
2031
2032                                    if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
2033                                        detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
2034
2035                                    if (detect_unnamed_bitfields)
2036                                    {
2037                                        BitfieldInfo anon_field_info;
2038
2039                                        if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
2040                                        {
2041                                            uint64_t last_field_end = 0;
2042
2043                                            if (last_field_info.IsValid())
2044                                                last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
2045
2046                                            if (this_field_info.bit_offset != last_field_end)
2047                                            {
2048                                                if (((last_field_end % character_width) == 0) ||                    // case 1
2049                                                    (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
2050                                                {
2051                                                    anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2052                                                    anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2053                                                }
2054                                                else                                                                // case 2
2055                                                {
2056                                                    anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2057                                                    anon_field_info.bit_offset = last_field_end;
2058                                                }
2059                                            }
2060                                        }
2061
2062                                        if (anon_field_info.IsValid())
2063                                        {
2064                                            clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
2065                                                                                                                             GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
2066                                                                                                                             accessibility,
2067                                                                                                                             anon_field_info.bit_size);
2068
2069                                            layout_info.field_offsets.insert(std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
2070                                        }
2071                                    }
2072                                    last_field_info = this_field_info;
2073                                }
2074                                else
2075                                {
2076                                    last_field_info.Clear();
2077                                }
2078
2079                                ClangASTType member_clang_type = member_type->GetClangLayoutType();
2080
2081                                {
2082                                    // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
2083                                    // If the current field is at the end of the structure, then there is definitely no room for extra
2084                                    // elements and we override the type to array[0].
2085
2086                                    ClangASTType member_array_element_type;
2087                                    uint64_t member_array_size;
2088                                    bool member_array_is_incomplete;
2089
2090                                    if (member_clang_type.IsArrayType(&member_array_element_type,
2091                                                                      &member_array_size,
2092                                                                      &member_array_is_incomplete) &&
2093                                        !member_array_is_incomplete)
2094                                    {
2095                                        uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2096
2097                                        if (member_byte_offset >= parent_byte_size)
2098                                        {
2099                                            if (member_array_size != 1)
2100                                            {
2101                                                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,
2102                                                                                           MakeUserID(die->GetOffset()),
2103                                                                                           name,
2104                                                                                           encoding_uid,
2105                                                                                           MakeUserID(parent_die->GetOffset()));
2106                                            }
2107
2108                                            member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2109                                        }
2110                                    }
2111                                }
2112
2113                                field_decl = class_clang_type.AddFieldToRecordType (name,
2114                                                                                    member_clang_type,
2115                                                                                    accessibility,
2116                                                                                    bit_size);
2117
2118                                GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2119
2120                                layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
2121
2122                            }
2123                            else
2124                            {
2125                                if (name)
2126                                    GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2127                                                                               MakeUserID(die->GetOffset()),
2128                                                                               name,
2129                                                                               encoding_uid);
2130                                else
2131                                    GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2132                                                                               MakeUserID(die->GetOffset()),
2133                                                                               encoding_uid);
2134                            }
2135                        }
2136
2137                        if (prop_name != NULL)
2138                        {
2139                            clang::ObjCIvarDecl *ivar_decl = NULL;
2140
2141                            if (field_decl)
2142                            {
2143                                ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2144                                assert (ivar_decl != NULL);
2145                            }
2146
2147                            ClangASTMetadata metadata;
2148                            metadata.SetUserID (MakeUserID(die->GetOffset()));
2149                            delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2150                                                                                     prop_name,
2151                                                                                     member_type->GetClangLayoutType(),
2152                                                                                     ivar_decl,
2153                                                                                     prop_setter_name,
2154                                                                                     prop_getter_name,
2155                                                                                     prop_attributes,
2156                                                                                     &metadata));
2157
2158                            if (ivar_decl)
2159                                GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2160                        }
2161                    }
2162                }
2163                ++member_idx;
2164            }
2165            break;
2166
2167        case DW_TAG_subprogram:
2168            // Let the type parsing code handle this one for us.
2169            member_function_dies.Append (die);
2170            break;
2171
2172        case DW_TAG_inheritance:
2173            {
2174                is_a_class = true;
2175                if (default_accessibility == eAccessNone)
2176                    default_accessibility = eAccessPrivate;
2177                // TODO: implement DW_TAG_inheritance type parsing
2178                DWARFDebugInfoEntry::Attributes attributes;
2179                const size_t num_attributes = die->GetAttributes (this,
2180                                                                  dwarf_cu,
2181                                                                  fixed_form_sizes,
2182                                                                  attributes);
2183                if (num_attributes > 0)
2184                {
2185                    Declaration decl;
2186                    DWARFExpression location;
2187                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2188                    AccessType accessibility = default_accessibility;
2189                    bool is_virtual = false;
2190                    bool is_base_of_class = true;
2191                    off_t member_byte_offset = 0;
2192                    uint32_t i;
2193                    for (i=0; i<num_attributes; ++i)
2194                    {
2195                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
2196                        DWARFFormValue form_value;
2197                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2198                        {
2199                            switch (attr)
2200                            {
2201                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2202                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
2203                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2204                            case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
2205                            case DW_AT_data_member_location:
2206                                if (form_value.BlockData())
2207                                {
2208                                    Value initialValue(0);
2209                                    Value memberOffset(0);
2210                                    const DWARFDataExtractor& debug_info_data = get_debug_info_data();
2211                                    uint32_t block_length = form_value.Unsigned();
2212                                    uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2213                                    if (DWARFExpression::Evaluate (NULL,
2214                                                                   NULL,
2215                                                                   NULL,
2216                                                                   NULL,
2217                                                                   module,
2218                                                                   debug_info_data,
2219                                                                   block_offset,
2220                                                                   block_length,
2221                                                                   eRegisterKindDWARF,
2222                                                                   &initialValue,
2223                                                                   memberOffset,
2224                                                                   NULL))
2225                                    {
2226                                        member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2227                                    }
2228                                }
2229                                else
2230                                {
2231                                    // With DWARF 3 and later, if the value is an integer constant,
2232                                    // this form value is the offset in bytes from the beginning
2233                                    // of the containing entity.
2234                                    member_byte_offset = form_value.Unsigned();
2235                                }
2236                                break;
2237
2238                            case DW_AT_accessibility:
2239                                accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2240                                break;
2241
2242                            case DW_AT_virtuality:
2243                                is_virtual = form_value.Boolean();
2244                                break;
2245
2246                            case DW_AT_sibling:
2247                                break;
2248
2249                            default:
2250                                break;
2251                            }
2252                        }
2253                    }
2254
2255                    Type *base_class_type = ResolveTypeUID(encoding_uid);
2256                    assert(base_class_type);
2257
2258                    ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2259                    assert (base_class_clang_type);
2260                    if (class_language == eLanguageTypeObjC)
2261                    {
2262                        class_clang_type.SetObjCSuperClass(base_class_clang_type);
2263                    }
2264                    else
2265                    {
2266                        base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2267                                                                                               is_virtual,
2268                                                                                               is_base_of_class));
2269
2270                        if (is_virtual)
2271                        {
2272                            // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2273                            // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2274                            // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2275                            //      DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2276                            // Given this, there is really no valid response we can give to clang for virtual base
2277                            // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2278                            // AST source in clang.
2279                        }
2280                        else
2281                        {
2282                            layout_info.base_offsets.insert(std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2283                                                                           clang::CharUnits::fromQuantity(member_byte_offset)));
2284                        }
2285                    }
2286                }
2287            }
2288            break;
2289
2290        default:
2291            break;
2292        }
2293    }
2294
2295    return count;
2296}
2297
2298
2299clang::DeclContext*
2300SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2301{
2302    DWARFDebugInfo* debug_info = DebugInfo();
2303    if (debug_info && UserIDMatches(type_uid))
2304    {
2305        DWARFCompileUnitSP cu_sp;
2306        const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2307        if (die)
2308            return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2309    }
2310    return NULL;
2311}
2312
2313clang::DeclContext*
2314SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2315{
2316    if (UserIDMatches(type_uid))
2317        return GetClangDeclContextForDIEOffset (sc, type_uid);
2318    return NULL;
2319}
2320
2321Type*
2322SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2323{
2324    if (UserIDMatches(type_uid))
2325    {
2326        DWARFDebugInfo* debug_info = DebugInfo();
2327        if (debug_info)
2328        {
2329            DWARFCompileUnitSP cu_sp;
2330            const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2331            const bool assert_not_being_parsed = true;
2332            return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2333        }
2334    }
2335    return NULL;
2336}
2337
2338Type*
2339SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2340{
2341    if (die != NULL)
2342    {
2343        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2344        if (log)
2345            GetObjectFile()->GetModule()->LogMessage (log,
2346                                                      "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2347                                                      die->GetOffset(),
2348                                                      DW_TAG_value_to_name(die->Tag()),
2349                                                      die->GetName(this, cu));
2350
2351        // We might be coming in in the middle of a type tree (a class
2352        // withing a class, an enum within a class), so parse any needed
2353        // parent DIEs before we get to this one...
2354        const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2355        switch (decl_ctx_die->Tag())
2356        {
2357            case DW_TAG_structure_type:
2358            case DW_TAG_union_type:
2359            case DW_TAG_class_type:
2360            {
2361                // Get the type, which could be a forward declaration
2362                if (log)
2363                    GetObjectFile()->GetModule()->LogMessage (log,
2364                                                              "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2365                                                              die->GetOffset(),
2366                                                              DW_TAG_value_to_name(die->Tag()),
2367                                                              die->GetName(this, cu),
2368                                                              decl_ctx_die->GetOffset());
2369//
2370//                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2371//                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2372//                {
2373//                    if (log)
2374//                        GetObjectFile()->GetModule()->LogMessage (log,
2375//                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2376//                                                                  die->GetOffset(),
2377//                                                                  DW_TAG_value_to_name(die->Tag()),
2378//                                                                  die->GetName(this, cu),
2379//                                                                  decl_ctx_die->GetOffset());
2380//                    // Ask the type to complete itself if it already hasn't since if we
2381//                    // want a function (method or static) from a class, the class must
2382//                    // create itself and add it's own methods and class functions.
2383//                    if (parent_type)
2384//                        parent_type->GetClangFullType();
2385//                }
2386            }
2387            break;
2388
2389            default:
2390                break;
2391        }
2392        return ResolveType (cu, die);
2393    }
2394    return NULL;
2395}
2396
2397// This function is used when SymbolFileDWARFDebugMap owns a bunch of
2398// SymbolFileDWARF objects to detect if this DWARF file is the one that
2399// can resolve a clang_type.
2400bool
2401SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2402{
2403    ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2404    const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2405    return die != NULL;
2406}
2407
2408
2409bool
2410SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2411{
2412    // We have a struct/union/class/enum that needs to be fully resolved.
2413    ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2414    const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2415    if (die == NULL)
2416    {
2417        // We have already resolved this type...
2418        return true;
2419    }
2420    // Once we start resolving this type, remove it from the forward declaration
2421    // map in case anyone child members or other types require this type to get resolved.
2422    // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2423    // are done.
2424    m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2425
2426    // Disable external storage for this type so we don't get anymore
2427    // clang::ExternalASTSource queries for this type.
2428    clang_type.SetHasExternalStorage (false);
2429
2430    DWARFDebugInfo* debug_info = DebugInfo();
2431
2432    DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2433    Type *type = m_die_to_type.lookup (die);
2434
2435    const dw_tag_t tag = die->Tag();
2436
2437    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2438    if (log)
2439        GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2440                                                                  "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2441                                                                  MakeUserID(die->GetOffset()),
2442                                                                  DW_TAG_value_to_name(tag),
2443                                                                  type->GetName().AsCString());
2444    assert (clang_type);
2445    DWARFDebugInfoEntry::Attributes attributes;
2446
2447    switch (tag)
2448    {
2449    case DW_TAG_structure_type:
2450    case DW_TAG_union_type:
2451    case DW_TAG_class_type:
2452        {
2453            LayoutInfo layout_info;
2454
2455            {
2456                if (die->HasChildren())
2457                {
2458                    LanguageType class_language = eLanguageTypeUnknown;
2459                    if (clang_type.IsObjCObjectOrInterfaceType())
2460                    {
2461                        class_language = eLanguageTypeObjC;
2462                        // For objective C we don't start the definition when
2463                        // the class is created.
2464                        clang_type.StartTagDeclarationDefinition ();
2465                    }
2466
2467                    int tag_decl_kind = -1;
2468                    AccessType default_accessibility = eAccessNone;
2469                    if (tag == DW_TAG_structure_type)
2470                    {
2471                        tag_decl_kind = clang::TTK_Struct;
2472                        default_accessibility = eAccessPublic;
2473                    }
2474                    else if (tag == DW_TAG_union_type)
2475                    {
2476                        tag_decl_kind = clang::TTK_Union;
2477                        default_accessibility = eAccessPublic;
2478                    }
2479                    else if (tag == DW_TAG_class_type)
2480                    {
2481                        tag_decl_kind = clang::TTK_Class;
2482                        default_accessibility = eAccessPrivate;
2483                    }
2484
2485                    SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2486                    std::vector<clang::CXXBaseSpecifier *> base_classes;
2487                    std::vector<int> member_accessibilities;
2488                    bool is_a_class = false;
2489                    // Parse members and base classes first
2490                    DWARFDIECollection member_function_dies;
2491
2492                    DelayedPropertyList delayed_properties;
2493                    ParseChildMembers (sc,
2494                                       dwarf_cu,
2495                                       die,
2496                                       clang_type,
2497                                       class_language,
2498                                       base_classes,
2499                                       member_accessibilities,
2500                                       member_function_dies,
2501                                       delayed_properties,
2502                                       default_accessibility,
2503                                       is_a_class,
2504                                       layout_info);
2505
2506                    // Now parse any methods if there were any...
2507                    size_t num_functions = member_function_dies.Size();
2508                    if (num_functions > 0)
2509                    {
2510                        for (size_t i=0; i<num_functions; ++i)
2511                        {
2512                            ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2513                        }
2514                    }
2515
2516                    if (class_language == eLanguageTypeObjC)
2517                    {
2518                        ConstString class_name (clang_type.GetTypeName());
2519                        if (class_name)
2520                        {
2521                            DIEArray method_die_offsets;
2522                            if (m_using_apple_tables)
2523                            {
2524                                if (m_apple_objc_ap.get())
2525                                    m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2526                            }
2527                            else
2528                            {
2529                                if (!m_indexed)
2530                                    Index ();
2531
2532                                m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2533                            }
2534
2535                            if (!method_die_offsets.empty())
2536                            {
2537                                DWARFDebugInfo* debug_info = DebugInfo();
2538
2539                                DWARFCompileUnit* method_cu = NULL;
2540                                const size_t num_matches = method_die_offsets.size();
2541                                for (size_t i=0; i<num_matches; ++i)
2542                                {
2543                                    const dw_offset_t die_offset = method_die_offsets[i];
2544                                    DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2545
2546                                    if (method_die)
2547                                        ResolveType (method_cu, method_die);
2548                                    else
2549                                    {
2550                                        if (m_using_apple_tables)
2551                                        {
2552                                            GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2553                                                                                                       die_offset, class_name.GetCString());
2554                                        }
2555                                    }
2556                                }
2557                            }
2558
2559                            for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2560                                 pi != pe;
2561                                 ++pi)
2562                                pi->Finalize();
2563                        }
2564                    }
2565
2566                    // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2567                    // need to tell the clang type it is actually a class.
2568                    if (class_language != eLanguageTypeObjC)
2569                    {
2570                        if (is_a_class && tag_decl_kind != clang::TTK_Class)
2571                            clang_type.SetTagTypeKind (clang::TTK_Class);
2572                    }
2573
2574                    // Since DW_TAG_structure_type gets used for both classes
2575                    // and structures, we may need to set any DW_TAG_member
2576                    // fields to have a "private" access if none was specified.
2577                    // When we parsed the child members we tracked that actual
2578                    // accessibility value for each DW_TAG_member in the
2579                    // "member_accessibilities" array. If the value for the
2580                    // member is zero, then it was set to the "default_accessibility"
2581                    // which for structs was "public". Below we correct this
2582                    // by setting any fields to "private" that weren't correctly
2583                    // set.
2584                    if (is_a_class && !member_accessibilities.empty())
2585                    {
2586                        // This is a class and all members that didn't have
2587                        // their access specified are private.
2588                        clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2589                                                                    &member_accessibilities.front(),
2590                                                                    member_accessibilities.size());
2591                    }
2592
2593                    if (!base_classes.empty())
2594                    {
2595                        // Make sure all base classes refer to complete types and not
2596                        // forward declarations. If we don't do this, clang will crash
2597                        // with an assertion in the call to clang_type.SetBaseClassesForClassType()
2598                        bool base_class_error = false;
2599                        for (auto &base_class : base_classes)
2600                        {
2601                            clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
2602                            if (type_source_info)
2603                            {
2604                                ClangASTType base_class_type (GetClangASTContext().getASTContext(), type_source_info->getType());
2605                                if (base_class_type.GetCompleteType() == false)
2606                                {
2607                                    if (!base_class_error)
2608                                    {
2609                                        GetObjectFile()->GetModule()->ReportError ("DWARF DIE at 0x%8.8x for class '%s' has a base class '%s' that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
2610                                                                                   die->GetOffset(),
2611                                                                                   die->GetName(this, dwarf_cu),
2612                                                                                   base_class_type.GetTypeName().GetCString(),
2613                                                                                   sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
2614                                    }
2615                                    // We have no choice other than to pretend that the base class
2616                                    // is complete. If we don't do this, clang will crash when we
2617                                    // call setBases() inside of "clang_type.SetBaseClassesForClassType()"
2618                                    // below. Since we provide layout assistance, all ivars in this
2619                                    // class and other classes will be fine, this is the best we can do
2620                                    // short of crashing.
2621                                    base_class_type.StartTagDeclarationDefinition ();
2622                                    base_class_type.CompleteTagDeclarationDefinition ();
2623                                }
2624                            }
2625                        }
2626                        clang_type.SetBaseClassesForClassType (&base_classes.front(),
2627                                                               base_classes.size());
2628
2629                        // Clang will copy each CXXBaseSpecifier in "base_classes"
2630                        // so we have to free them all.
2631                        ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2632                                                                 base_classes.size());
2633                    }
2634                }
2635            }
2636
2637            clang_type.BuildIndirectFields ();
2638            clang_type.CompleteTagDeclarationDefinition ();
2639
2640            if (!layout_info.field_offsets.empty() ||
2641                !layout_info.base_offsets.empty()  ||
2642                !layout_info.vbase_offsets.empty() )
2643            {
2644                if (type)
2645                    layout_info.bit_size = type->GetByteSize() * 8;
2646                if (layout_info.bit_size == 0)
2647                    layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2648
2649                clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2650                if (record_decl)
2651                {
2652                    if (log)
2653                    {
2654                        GetObjectFile()->GetModule()->LogMessage (log,
2655                                                                  "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])",
2656                                                                  static_cast<void*>(clang_type.GetOpaqueQualType()),
2657                                                                  static_cast<void*>(record_decl),
2658                                                                  layout_info.bit_size,
2659                                                                  layout_info.alignment,
2660                                                                  static_cast<uint32_t>(layout_info.field_offsets.size()),
2661                                                                  static_cast<uint32_t>(layout_info.base_offsets.size()),
2662                                                                  static_cast<uint32_t>(layout_info.vbase_offsets.size()));
2663
2664                        uint32_t idx;
2665                        {
2666                        llvm::DenseMap <const clang::FieldDecl *, uint64_t>::const_iterator pos, end = layout_info.field_offsets.end();
2667                        for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2668                        {
2669                            GetObjectFile()->GetModule()->LogMessage (log,
2670                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }",
2671                                                                      static_cast<void*>(clang_type.GetOpaqueQualType()),
2672                                                                      idx,
2673                                                                      static_cast<uint32_t>(pos->second),
2674                                                                      pos->first->getNameAsString().c_str());
2675                        }
2676                        }
2677
2678                        {
2679                        llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, base_end = layout_info.base_offsets.end();
2680                        for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx)
2681                        {
2682                            GetObjectFile()->GetModule()->LogMessage (log,
2683                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }",
2684                                                                      clang_type.GetOpaqueQualType(),
2685                                                                      idx,
2686                                                                      (uint32_t)base_pos->second.getQuantity(),
2687                                                                      base_pos->first->getNameAsString().c_str());
2688                        }
2689                        }
2690                        {
2691                        llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, vbase_end = layout_info.vbase_offsets.end();
2692                        for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx)
2693                        {
2694                            GetObjectFile()->GetModule()->LogMessage (log,
2695                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }",
2696                                                                      static_cast<void*>(clang_type.GetOpaqueQualType()),
2697                                                                      idx,
2698                                                                      static_cast<uint32_t>(vbase_pos->second.getQuantity()),
2699                                                                      vbase_pos->first->getNameAsString().c_str());
2700                        }
2701                        }
2702                    }
2703                    m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2704                }
2705            }
2706        }
2707
2708        return (bool)clang_type;
2709
2710    case DW_TAG_enumeration_type:
2711        clang_type.StartTagDeclarationDefinition ();
2712        if (die->HasChildren())
2713        {
2714            SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2715            bool is_signed = false;
2716            clang_type.IsIntegerType(is_signed);
2717            ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2718        }
2719        clang_type.CompleteTagDeclarationDefinition ();
2720        return (bool)clang_type;
2721
2722    default:
2723        assert(false && "not a forward clang type decl!");
2724        break;
2725    }
2726    return false;
2727}
2728
2729Type*
2730SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2731{
2732    if (type_die != NULL)
2733    {
2734        Type *type = m_die_to_type.lookup (type_die);
2735
2736        if (type == NULL)
2737            type = GetTypeForDIE (dwarf_cu, type_die).get();
2738
2739        if (assert_not_being_parsed)
2740        {
2741            if (type != DIE_IS_BEING_PARSED)
2742                return type;
2743
2744            GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2745                                                       type_die->GetOffset(),
2746                                                       DW_TAG_value_to_name(type_die->Tag()),
2747                                                       type_die->GetName(this, dwarf_cu));
2748
2749        }
2750        else
2751            return type;
2752    }
2753    return NULL;
2754}
2755
2756CompileUnit*
2757SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2758{
2759    // Check if the symbol vendor already knows about this compile unit?
2760    if (dwarf_cu->GetUserData() == NULL)
2761    {
2762        // The symbol vendor doesn't know about this compile unit, we
2763        // need to parse and add it to the symbol vendor object.
2764        return ParseCompileUnit(dwarf_cu, cu_idx).get();
2765    }
2766    return (CompileUnit*)dwarf_cu->GetUserData();
2767}
2768
2769bool
2770SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2771{
2772    sc.Clear(false);
2773    // Check if the symbol vendor already knows about this compile unit?
2774    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2775
2776    sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2777    if (sc.function == NULL)
2778        sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2779
2780    if (sc.function)
2781    {
2782        sc.module_sp = sc.function->CalculateSymbolContextModule();
2783        return true;
2784    }
2785
2786    return false;
2787}
2788
2789uint32_t
2790SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2791{
2792    Timer scoped_timer(__PRETTY_FUNCTION__,
2793                       "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2794                       static_cast<void*>(so_addr.GetSection().get()),
2795                       so_addr.GetOffset(), resolve_scope);
2796    uint32_t resolved = 0;
2797    if (resolve_scope & (   eSymbolContextCompUnit |
2798                            eSymbolContextFunction |
2799                            eSymbolContextBlock |
2800                            eSymbolContextLineEntry))
2801    {
2802        lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2803
2804        DWARFDebugInfo* debug_info = DebugInfo();
2805        if (debug_info)
2806        {
2807            const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2808            if (cu_offset != DW_INVALID_OFFSET)
2809            {
2810                uint32_t cu_idx = DW_INVALID_INDEX;
2811                DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
2812                if (dwarf_cu)
2813                {
2814                    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2815                    if (sc.comp_unit)
2816                    {
2817                        resolved |= eSymbolContextCompUnit;
2818
2819                        bool force_check_line_table = false;
2820                        if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2821                        {
2822                            DWARFDebugInfoEntry *function_die = NULL;
2823                            DWARFDebugInfoEntry *block_die = NULL;
2824                            if (resolve_scope & eSymbolContextBlock)
2825                            {
2826                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
2827                            }
2828                            else
2829                            {
2830                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
2831                            }
2832
2833                            if (function_die != NULL)
2834                            {
2835                                sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2836                                if (sc.function == NULL)
2837                                    sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2838                            }
2839                            else
2840                            {
2841                                // We might have had a compile unit that had discontiguous
2842                                // address ranges where the gaps are symbols that don't have
2843                                // any debug info. Discontiguous compile unit address ranges
2844                                // should only happen when there aren't other functions from
2845                                // other compile units in these gaps. This helps keep the size
2846                                // of the aranges down.
2847                                force_check_line_table = true;
2848                            }
2849
2850                            if (sc.function != NULL)
2851                            {
2852                                resolved |= eSymbolContextFunction;
2853
2854                                if (resolve_scope & eSymbolContextBlock)
2855                                {
2856                                    Block& block = sc.function->GetBlock (true);
2857
2858                                    if (block_die != NULL)
2859                                        sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2860                                    else
2861                                        sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2862                                    if (sc.block)
2863                                        resolved |= eSymbolContextBlock;
2864                                }
2865                            }
2866                        }
2867
2868                        if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
2869                        {
2870                            LineTable *line_table = sc.comp_unit->GetLineTable();
2871                            if (line_table != NULL)
2872                            {
2873                                // And address that makes it into this function should be in terms
2874                                // of this debug file if there is no debug map, or it will be an
2875                                // address in the .o file which needs to be fixed up to be in terms
2876                                // of the debug map executable. Either way, calling FixupAddress()
2877                                // will work for us.
2878                                Address exe_so_addr (so_addr);
2879                                if (FixupAddress(exe_so_addr))
2880                                {
2881                                    if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
2882                                    {
2883                                        resolved |= eSymbolContextLineEntry;
2884                                    }
2885                                }
2886                            }
2887                        }
2888
2889                        if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
2890                        {
2891                            // We might have had a compile unit that had discontiguous
2892                            // address ranges where the gaps are symbols that don't have
2893                            // any debug info. Discontiguous compile unit address ranges
2894                            // should only happen when there aren't other functions from
2895                            // other compile units in these gaps. This helps keep the size
2896                            // of the aranges down.
2897                            sc.comp_unit = NULL;
2898                            resolved &= ~eSymbolContextCompUnit;
2899                        }
2900                    }
2901                    else
2902                    {
2903                        GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
2904                                                                     cu_offset,
2905                                                                     cu_idx);
2906                    }
2907                }
2908            }
2909        }
2910    }
2911    return resolved;
2912}
2913
2914
2915
2916uint32_t
2917SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
2918{
2919    const uint32_t prev_size = sc_list.GetSize();
2920    if (resolve_scope & eSymbolContextCompUnit)
2921    {
2922        DWARFDebugInfo* debug_info = DebugInfo();
2923        if (debug_info)
2924        {
2925            uint32_t cu_idx;
2926            DWARFCompileUnit* dwarf_cu = NULL;
2927
2928            for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
2929            {
2930                CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2931                const bool full_match = (bool)file_spec.GetDirectory();
2932                bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
2933                if (check_inlines || file_spec_matches_cu_file_spec)
2934                {
2935                    SymbolContext sc (m_obj_file->GetModule());
2936                    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2937                    if (sc.comp_unit)
2938                    {
2939                        uint32_t file_idx = UINT32_MAX;
2940
2941                        // If we are looking for inline functions only and we don't
2942                        // find it in the support files, we are done.
2943                        if (check_inlines)
2944                        {
2945                            file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2946                            if (file_idx == UINT32_MAX)
2947                                continue;
2948                        }
2949
2950                        if (line != 0)
2951                        {
2952                            LineTable *line_table = sc.comp_unit->GetLineTable();
2953
2954                            if (line_table != NULL && line != 0)
2955                            {
2956                                // We will have already looked up the file index if
2957                                // we are searching for inline entries.
2958                                if (!check_inlines)
2959                                    file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2960
2961                                if (file_idx != UINT32_MAX)
2962                                {
2963                                    uint32_t found_line;
2964                                    uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
2965                                    found_line = sc.line_entry.line;
2966
2967                                    while (line_idx != UINT32_MAX)
2968                                    {
2969                                        sc.function = NULL;
2970                                        sc.block = NULL;
2971                                        if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2972                                        {
2973                                            const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
2974                                            if (file_vm_addr != LLDB_INVALID_ADDRESS)
2975                                            {
2976                                                DWARFDebugInfoEntry *function_die = NULL;
2977                                                DWARFDebugInfoEntry *block_die = NULL;
2978                                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
2979
2980                                                if (function_die != NULL)
2981                                                {
2982                                                    sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2983                                                    if (sc.function == NULL)
2984                                                        sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2985                                                }
2986
2987                                                if (sc.function != NULL)
2988                                                {
2989                                                    Block& block = sc.function->GetBlock (true);
2990
2991                                                    if (block_die != NULL)
2992                                                        sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2993                                                    else
2994                                                        sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2995                                                }
2996                                            }
2997                                        }
2998
2999                                        sc_list.Append(sc);
3000                                        line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
3001                                    }
3002                                }
3003                            }
3004                            else if (file_spec_matches_cu_file_spec && !check_inlines)
3005                            {
3006                                // only append the context if we aren't looking for inline call sites
3007                                // by file and line and if the file spec matches that of the compile unit
3008                                sc_list.Append(sc);
3009                            }
3010                        }
3011                        else if (file_spec_matches_cu_file_spec && !check_inlines)
3012                        {
3013                            // only append the context if we aren't looking for inline call sites
3014                            // by file and line and if the file spec matches that of the compile unit
3015                            sc_list.Append(sc);
3016                        }
3017
3018                        if (!check_inlines)
3019                            break;
3020                    }
3021                }
3022            }
3023        }
3024    }
3025    return sc_list.GetSize() - prev_size;
3026}
3027
3028void
3029SymbolFileDWARF::Index ()
3030{
3031    if (m_indexed)
3032        return;
3033    m_indexed = true;
3034    Timer scoped_timer (__PRETTY_FUNCTION__,
3035                        "SymbolFileDWARF::Index (%s)",
3036                        GetObjectFile()->GetFileSpec().GetFilename().AsCString());
3037
3038    DWARFDebugInfo* debug_info = DebugInfo();
3039    if (debug_info)
3040    {
3041        uint32_t cu_idx = 0;
3042        const uint32_t num_compile_units = GetNumCompileUnits();
3043        for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
3044        {
3045            DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
3046
3047            bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
3048
3049            dwarf_cu->Index (cu_idx,
3050                             m_function_basename_index,
3051                             m_function_fullname_index,
3052                             m_function_method_index,
3053                             m_function_selector_index,
3054                             m_objc_class_selectors_index,
3055                             m_global_index,
3056                             m_type_index,
3057                             m_namespace_index);
3058
3059            // Keep memory down by clearing DIEs if this generate function
3060            // caused them to be parsed
3061            if (clear_dies)
3062                dwarf_cu->ClearDIEs (true);
3063        }
3064
3065        m_function_basename_index.Finalize();
3066        m_function_fullname_index.Finalize();
3067        m_function_method_index.Finalize();
3068        m_function_selector_index.Finalize();
3069        m_objc_class_selectors_index.Finalize();
3070        m_global_index.Finalize();
3071        m_type_index.Finalize();
3072        m_namespace_index.Finalize();
3073
3074#if defined (ENABLE_DEBUG_PRINTF)
3075        StreamFile s(stdout, false);
3076        s.Printf ("DWARF index for '%s':",
3077                  GetObjectFile()->GetFileSpec().GetPath().c_str());
3078        s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
3079        s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
3080        s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
3081        s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
3082        s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
3083        s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
3084        s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
3085        s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
3086#endif
3087    }
3088}
3089
3090bool
3091SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3092{
3093    if (namespace_decl == NULL)
3094    {
3095        // Invalid namespace decl which means we aren't matching only things
3096        // in this symbol file, so return true to indicate it matches this
3097        // symbol file.
3098        return true;
3099    }
3100
3101    clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3102
3103    if (namespace_ast == NULL)
3104        return true;    // No AST in the "namespace_decl", return true since it
3105                        // could then match any symbol file, including this one
3106
3107    if (namespace_ast == GetClangASTContext().getASTContext())
3108        return true;    // The ASTs match, return true
3109
3110    // The namespace AST was valid, and it does not match...
3111    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3112
3113    if (log)
3114        GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3115
3116    return false;
3117}
3118
3119bool
3120SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3121                                   DWARFCompileUnit* cu,
3122                                   const DWARFDebugInfoEntry* die)
3123{
3124    // No namespace specified, so the answer is
3125    if (namespace_decl == NULL)
3126        return true;
3127
3128    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3129
3130    const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3131    clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3132    if (decl_ctx_die)
3133    {
3134        clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3135
3136        if (clang_namespace_decl)
3137        {
3138            if (decl_ctx_die->Tag() != DW_TAG_namespace)
3139            {
3140                if (log)
3141                    GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3142                return false;
3143            }
3144
3145            if (clang_namespace_decl == die_clang_decl_ctx)
3146                return true;
3147            else
3148                return false;
3149        }
3150        else
3151        {
3152            // We have a namespace_decl that was not NULL but it contained
3153            // a NULL "clang::NamespaceDecl", so this means the global namespace
3154            // So as long the contained decl context DIE isn't a namespace
3155            // we should be ok.
3156            if (decl_ctx_die->Tag() != DW_TAG_namespace)
3157                return true;
3158        }
3159    }
3160
3161    if (log)
3162        GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3163
3164    return false;
3165}
3166uint32_t
3167SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3168{
3169    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3170
3171    if (log)
3172        GetObjectFile()->GetModule()->LogMessage (log,
3173                                                  "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3174                                                  name.GetCString(),
3175                                                  static_cast<const void*>(namespace_decl),
3176                                                  append, max_matches);
3177
3178    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3179        return 0;
3180
3181    DWARFDebugInfo* info = DebugInfo();
3182    if (info == NULL)
3183        return 0;
3184
3185    // If we aren't appending the results to this list, then clear the list
3186    if (!append)
3187        variables.Clear();
3188
3189    // Remember how many variables are in the list before we search in case
3190    // we are appending the results to a variable list.
3191    const uint32_t original_size = variables.GetSize();
3192
3193    DIEArray die_offsets;
3194
3195    if (m_using_apple_tables)
3196    {
3197        if (m_apple_names_ap.get())
3198        {
3199            const char *name_cstr = name.GetCString();
3200            const char *base_name_start;
3201            const char *base_name_end = NULL;
3202
3203            if (!CPPLanguageRuntime::StripNamespacesFromVariableName(name_cstr, base_name_start, base_name_end))
3204                base_name_start = name_cstr;
3205
3206            m_apple_names_ap->FindByName (base_name_start, die_offsets);
3207        }
3208    }
3209    else
3210    {
3211        // Index the DWARF if we haven't already
3212        if (!m_indexed)
3213            Index ();
3214
3215        m_global_index.Find (name, die_offsets);
3216    }
3217
3218    const size_t num_die_matches = die_offsets.size();
3219    if (num_die_matches)
3220    {
3221        SymbolContext sc;
3222        sc.module_sp = m_obj_file->GetModule();
3223        assert (sc.module_sp);
3224
3225        DWARFDebugInfo* debug_info = DebugInfo();
3226        DWARFCompileUnit* dwarf_cu = NULL;
3227        const DWARFDebugInfoEntry* die = NULL;
3228        bool done = false;
3229        for (size_t i=0; i<num_die_matches && !done; ++i)
3230        {
3231            const dw_offset_t die_offset = die_offsets[i];
3232            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3233
3234            if (die)
3235            {
3236                switch (die->Tag())
3237                {
3238                    default:
3239                    case DW_TAG_subprogram:
3240                    case DW_TAG_inlined_subroutine:
3241                    case DW_TAG_try_block:
3242                    case DW_TAG_catch_block:
3243                        break;
3244
3245                    case DW_TAG_variable:
3246                        {
3247                            sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3248
3249                            if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3250                                continue;
3251
3252                            ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3253
3254                            if (variables.GetSize() - original_size >= max_matches)
3255                                done = true;
3256                        }
3257                        break;
3258                }
3259            }
3260            else
3261            {
3262                if (m_using_apple_tables)
3263                {
3264                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3265                                                                               die_offset, name.GetCString());
3266                }
3267            }
3268        }
3269    }
3270
3271    // Return the number of variable that were appended to the list
3272    const uint32_t num_matches = variables.GetSize() - original_size;
3273    if (log && num_matches > 0)
3274    {
3275        GetObjectFile()->GetModule()->LogMessage (log,
3276                                                  "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3277                                                  name.GetCString(),
3278                                                  static_cast<const void*>(namespace_decl),
3279                                                  append, max_matches,
3280                                                  num_matches);
3281    }
3282    return num_matches;
3283}
3284
3285uint32_t
3286SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3287{
3288    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3289
3290    if (log)
3291    {
3292        GetObjectFile()->GetModule()->LogMessage (log,
3293                                                  "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3294                                                  regex.GetText(), append,
3295                                                  max_matches);
3296    }
3297
3298    DWARFDebugInfo* info = DebugInfo();
3299    if (info == NULL)
3300        return 0;
3301
3302    // If we aren't appending the results to this list, then clear the list
3303    if (!append)
3304        variables.Clear();
3305
3306    // Remember how many variables are in the list before we search in case
3307    // we are appending the results to a variable list.
3308    const uint32_t original_size = variables.GetSize();
3309
3310    DIEArray die_offsets;
3311
3312    if (m_using_apple_tables)
3313    {
3314        if (m_apple_names_ap.get())
3315        {
3316            DWARFMappedHash::DIEInfoArray hash_data_array;
3317            if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3318                DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3319        }
3320    }
3321    else
3322    {
3323        // Index the DWARF if we haven't already
3324        if (!m_indexed)
3325            Index ();
3326
3327        m_global_index.Find (regex, die_offsets);
3328    }
3329
3330    SymbolContext sc;
3331    sc.module_sp = m_obj_file->GetModule();
3332    assert (sc.module_sp);
3333
3334    DWARFCompileUnit* dwarf_cu = NULL;
3335    const DWARFDebugInfoEntry* die = NULL;
3336    const size_t num_matches = die_offsets.size();
3337    if (num_matches)
3338    {
3339        DWARFDebugInfo* debug_info = DebugInfo();
3340        for (size_t i=0; i<num_matches; ++i)
3341        {
3342            const dw_offset_t die_offset = die_offsets[i];
3343            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3344
3345            if (die)
3346            {
3347                sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3348
3349                ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3350
3351                if (variables.GetSize() - original_size >= max_matches)
3352                    break;
3353            }
3354            else
3355            {
3356                if (m_using_apple_tables)
3357                {
3358                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3359                                                                               die_offset, regex.GetText());
3360                }
3361            }
3362        }
3363    }
3364
3365    // Return the number of variable that were appended to the list
3366    return variables.GetSize() - original_size;
3367}
3368
3369
3370bool
3371SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3372                                  DWARFCompileUnit *&dwarf_cu,
3373                                  SymbolContextList& sc_list)
3374{
3375    const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3376    return ResolveFunction (dwarf_cu, die, sc_list);
3377}
3378
3379
3380bool
3381SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3382                                  const DWARFDebugInfoEntry *die,
3383                                  SymbolContextList& sc_list)
3384{
3385    SymbolContext sc;
3386
3387    if (die == NULL)
3388        return false;
3389
3390    // If we were passed a die that is not a function, just return false...
3391    if (die->Tag() != DW_TAG_subprogram && die->Tag() != DW_TAG_inlined_subroutine)
3392        return false;
3393
3394    const DWARFDebugInfoEntry* inlined_die = NULL;
3395    if (die->Tag() == DW_TAG_inlined_subroutine)
3396    {
3397        inlined_die = die;
3398
3399        while ((die = die->GetParent()) != NULL)
3400        {
3401            if (die->Tag() == DW_TAG_subprogram)
3402                break;
3403        }
3404    }
3405    assert (die->Tag() == DW_TAG_subprogram);
3406    if (GetFunction (cu, die, sc))
3407    {
3408        Address addr;
3409        // Parse all blocks if needed
3410        if (inlined_die)
3411        {
3412            sc.block = sc.function->GetBlock (true).FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3413            assert (sc.block != NULL);
3414            if (sc.block->GetStartAddress (addr) == false)
3415                addr.Clear();
3416        }
3417        else
3418        {
3419            sc.block = NULL;
3420            addr = sc.function->GetAddressRange().GetBaseAddress();
3421        }
3422
3423        if (addr.IsValid())
3424        {
3425            sc_list.Append(sc);
3426            return true;
3427        }
3428    }
3429
3430    return false;
3431}
3432
3433void
3434SymbolFileDWARF::FindFunctions (const ConstString &name,
3435                                const NameToDIE &name_to_die,
3436                                SymbolContextList& sc_list)
3437{
3438    DIEArray die_offsets;
3439    if (name_to_die.Find (name, die_offsets))
3440    {
3441        ParseFunctions (die_offsets, sc_list);
3442    }
3443}
3444
3445
3446void
3447SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3448                                const NameToDIE &name_to_die,
3449                                SymbolContextList& sc_list)
3450{
3451    DIEArray die_offsets;
3452    if (name_to_die.Find (regex, die_offsets))
3453    {
3454        ParseFunctions (die_offsets, sc_list);
3455    }
3456}
3457
3458
3459void
3460SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3461                                const DWARFMappedHash::MemoryTable &memory_table,
3462                                SymbolContextList& sc_list)
3463{
3464    DIEArray die_offsets;
3465    DWARFMappedHash::DIEInfoArray hash_data_array;
3466    if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3467    {
3468        DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3469        ParseFunctions (die_offsets, sc_list);
3470    }
3471}
3472
3473void
3474SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3475                                 SymbolContextList& sc_list)
3476{
3477    const size_t num_matches = die_offsets.size();
3478    if (num_matches)
3479    {
3480        SymbolContext sc;
3481
3482        DWARFCompileUnit* dwarf_cu = NULL;
3483        for (size_t i=0; i<num_matches; ++i)
3484        {
3485            const dw_offset_t die_offset = die_offsets[i];
3486            ResolveFunction (die_offset, dwarf_cu, sc_list);
3487        }
3488    }
3489}
3490
3491bool
3492SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3493                                                const DWARFCompileUnit *dwarf_cu,
3494                                                uint32_t name_type_mask,
3495                                                const char *partial_name,
3496                                                const char *base_name_start,
3497                                                const char *base_name_end)
3498{
3499    // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3500    if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3501    {
3502        clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3503        if (!containing_decl_ctx)
3504            return false;
3505
3506        bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3507
3508        if (name_type_mask == eFunctionNameTypeMethod)
3509        {
3510            if (is_cxx_method == false)
3511                return false;
3512        }
3513
3514        if (name_type_mask == eFunctionNameTypeBase)
3515        {
3516            if (is_cxx_method == true)
3517                return false;
3518        }
3519    }
3520
3521    // Now we need to check whether the name we got back for this type matches the extra specifications
3522    // that were in the name we're looking up:
3523    if (base_name_start != partial_name || *base_name_end != '\0')
3524    {
3525        // First see if the stuff to the left matches the full name.  To do that let's see if
3526        // we can pull out the mips linkage name attribute:
3527
3528        Mangled best_name;
3529        DWARFDebugInfoEntry::Attributes attributes;
3530        DWARFFormValue form_value;
3531        die->GetAttributes(this, dwarf_cu, NULL, attributes);
3532        uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3533        if (idx == UINT32_MAX)
3534            idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3535        if (idx != UINT32_MAX)
3536        {
3537            if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3538            {
3539                const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3540                if (mangled_name)
3541                    best_name.SetValue (ConstString(mangled_name), true);
3542            }
3543        }
3544
3545        if (!best_name)
3546        {
3547            idx = attributes.FindAttributeIndex(DW_AT_name);
3548            if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3549            {
3550                const char *name = form_value.AsCString(&get_debug_str_data());
3551                best_name.SetValue (ConstString(name), false);
3552            }
3553        }
3554
3555        if (best_name.GetDemangledName())
3556        {
3557            const char *demangled = best_name.GetDemangledName().GetCString();
3558            if (demangled)
3559            {
3560                std::string name_no_parens(partial_name, base_name_end - partial_name);
3561                const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3562                if (partial_in_demangled == NULL)
3563                    return false;
3564                else
3565                {
3566                    // Sort out the case where our name is something like "Process::Destroy" and the match is
3567                    // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3568                    // namespace boundaries...
3569
3570                    if (partial_name[0] == ':'  && partial_name[1] == ':')
3571                    {
3572                        // The partial name was already on a namespace boundary so all matches are good.
3573                        return true;
3574                    }
3575                    else if (partial_in_demangled == demangled)
3576                    {
3577                        // They both start the same, so this is an good match.
3578                        return true;
3579                    }
3580                    else
3581                    {
3582                        if (partial_in_demangled - demangled == 1)
3583                        {
3584                            // Only one character difference, can't be a namespace boundary...
3585                            return false;
3586                        }
3587                        else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3588                        {
3589                            // We are on a namespace boundary, so this is also good.
3590                            return true;
3591                        }
3592                        else
3593                            return false;
3594                    }
3595                }
3596            }
3597        }
3598    }
3599
3600    return true;
3601}
3602
3603uint32_t
3604SymbolFileDWARF::FindFunctions (const ConstString &name,
3605                                const lldb_private::ClangNamespaceDecl *namespace_decl,
3606                                uint32_t name_type_mask,
3607                                bool include_inlines,
3608                                bool append,
3609                                SymbolContextList& sc_list)
3610{
3611    Timer scoped_timer (__PRETTY_FUNCTION__,
3612                        "SymbolFileDWARF::FindFunctions (name = '%s')",
3613                        name.AsCString());
3614
3615    // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3616    assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3617
3618    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3619
3620    if (log)
3621    {
3622        GetObjectFile()->GetModule()->LogMessage (log,
3623                                                  "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3624                                                  name.GetCString(),
3625                                                  name_type_mask,
3626                                                  append);
3627    }
3628
3629    // If we aren't appending the results to this list, then clear the list
3630    if (!append)
3631        sc_list.Clear();
3632
3633    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3634        return 0;
3635
3636    // If name is empty then we won't find anything.
3637    if (name.IsEmpty())
3638        return 0;
3639
3640    // Remember how many sc_list are in the list before we search in case
3641    // we are appending the results to a variable list.
3642
3643    const char *name_cstr = name.GetCString();
3644
3645    const uint32_t original_size = sc_list.GetSize();
3646
3647    DWARFDebugInfo* info = DebugInfo();
3648    if (info == NULL)
3649        return 0;
3650
3651    DWARFCompileUnit *dwarf_cu = NULL;
3652    std::set<const DWARFDebugInfoEntry *> resolved_dies;
3653    if (m_using_apple_tables)
3654    {
3655        if (m_apple_names_ap.get())
3656        {
3657
3658            DIEArray die_offsets;
3659
3660            uint32_t num_matches = 0;
3661
3662            if (name_type_mask & eFunctionNameTypeFull)
3663            {
3664                // If they asked for the full name, match what they typed.  At some point we may
3665                // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3666                // dies that we find by exact match.
3667                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3668                for (uint32_t i = 0; i < num_matches; i++)
3669                {
3670                    const dw_offset_t die_offset = die_offsets[i];
3671                    const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3672                    if (die)
3673                    {
3674                        if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3675                            continue;
3676
3677                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3678                            continue;
3679
3680                        if (resolved_dies.find(die) == resolved_dies.end())
3681                        {
3682                            if (ResolveFunction (dwarf_cu, die, sc_list))
3683                                resolved_dies.insert(die);
3684                        }
3685                    }
3686                    else
3687                    {
3688                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3689                                                                                   die_offset, name_cstr);
3690                    }
3691                }
3692            }
3693
3694            if (name_type_mask & eFunctionNameTypeSelector)
3695            {
3696                if (namespace_decl && *namespace_decl)
3697                    return 0; // no selectors in namespaces
3698
3699                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3700                // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3701                // and if it is an ObjC method name, we're good.
3702
3703                for (uint32_t i = 0; i < num_matches; i++)
3704                {
3705                    const dw_offset_t die_offset = die_offsets[i];
3706                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3707                    if (die)
3708                    {
3709                        const char *die_name = die->GetName(this, dwarf_cu);
3710                        if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3711                        {
3712                            if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3713                                continue;
3714
3715                            if (resolved_dies.find(die) == resolved_dies.end())
3716                            {
3717                                if (ResolveFunction (dwarf_cu, die, sc_list))
3718                                    resolved_dies.insert(die);
3719                            }
3720                        }
3721                    }
3722                    else
3723                    {
3724                        GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3725                                                                   die_offset, name_cstr);
3726                    }
3727                }
3728                die_offsets.clear();
3729            }
3730
3731            if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3732            {
3733                // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3734                // extract the base name, look that up, and if there is any other information in the name we were
3735                // passed in we have to post-filter based on that.
3736
3737                // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3738                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3739
3740                for (uint32_t i = 0; i < num_matches; i++)
3741                {
3742                    const dw_offset_t die_offset = die_offsets[i];
3743                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3744                    if (die)
3745                    {
3746                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3747                            continue;
3748
3749                        if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3750                            continue;
3751
3752                        // If we get to here, the die is good, and we should add it:
3753                        if (resolved_dies.find(die) == resolved_dies.end())
3754                        if (ResolveFunction (dwarf_cu, die, sc_list))
3755                        {
3756                            bool keep_die = true;
3757                            if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3758                            {
3759                                // We are looking for either basenames or methods, so we need to
3760                                // trim out the ones we won't want by looking at the type
3761                                SymbolContext sc;
3762                                if (sc_list.GetLastContext(sc))
3763                                {
3764                                    if (sc.block)
3765                                    {
3766                                        // We have an inlined function
3767                                    }
3768                                    else if (sc.function)
3769                                    {
3770                                        Type *type = sc.function->GetType();
3771
3772                                        if (type)
3773                                        {
3774                                            clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3775                                            if (decl_ctx->isRecord())
3776                                            {
3777                                                if (name_type_mask & eFunctionNameTypeBase)
3778                                                {
3779                                                    sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3780                                                    keep_die = false;
3781                                                }
3782                                            }
3783                                            else
3784                                            {
3785                                                if (name_type_mask & eFunctionNameTypeMethod)
3786                                                {
3787                                                    sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3788                                                    keep_die = false;
3789                                                }
3790                                            }
3791                                        }
3792                                        else
3793                                        {
3794                                            GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
3795                                                                                         die_offset);
3796                                        }
3797                                    }
3798                                }
3799                            }
3800                            if (keep_die)
3801                                resolved_dies.insert(die);
3802                        }
3803                    }
3804                    else
3805                    {
3806                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3807                                                                                   die_offset, name_cstr);
3808                    }
3809                }
3810                die_offsets.clear();
3811            }
3812        }
3813    }
3814    else
3815    {
3816
3817        // Index the DWARF if we haven't already
3818        if (!m_indexed)
3819            Index ();
3820
3821        if (name_type_mask & eFunctionNameTypeFull)
3822        {
3823            FindFunctions (name, m_function_fullname_index, sc_list);
3824
3825            // FIXME Temporary workaround for global/anonymous namespace
3826            // functions on FreeBSD and Linux
3827#if defined (__FreeBSD__) || defined (__linux__)
3828            // If we didn't find any functions in the global namespace try
3829            // looking in the basename index but ignore any returned
3830            // functions that have a namespace (ie. mangled names starting with
3831            // '_ZN') but keep functions which have an anonymous namespace
3832            if (sc_list.GetSize() == 0)
3833            {
3834                SymbolContextList temp_sc_list;
3835                FindFunctions (name, m_function_basename_index, temp_sc_list);
3836                if (!namespace_decl)
3837                {
3838                    SymbolContext sc;
3839                    for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
3840                    {
3841                        if (temp_sc_list.GetContextAtIndex(i, sc))
3842                        {
3843                            ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
3844                            ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
3845                            if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
3846                                !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
3847                            {
3848                                sc_list.Append(sc);
3849                            }
3850                        }
3851                    }
3852                }
3853            }
3854#endif
3855        }
3856        DIEArray die_offsets;
3857        DWARFCompileUnit *dwarf_cu = NULL;
3858
3859        if (name_type_mask & eFunctionNameTypeBase)
3860        {
3861            uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
3862            for (uint32_t i = 0; i < num_base; i++)
3863            {
3864                const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3865                if (die)
3866                {
3867                    if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3868                        continue;
3869
3870                    if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3871                        continue;
3872
3873                    // If we get to here, the die is good, and we should add it:
3874                    if (resolved_dies.find(die) == resolved_dies.end())
3875                    {
3876                        if (ResolveFunction (dwarf_cu, die, sc_list))
3877                            resolved_dies.insert(die);
3878                    }
3879                }
3880            }
3881            die_offsets.clear();
3882        }
3883
3884        if (name_type_mask & eFunctionNameTypeMethod)
3885        {
3886            if (namespace_decl && *namespace_decl)
3887                return 0; // no methods in namespaces
3888
3889            uint32_t num_base = m_function_method_index.Find(name, die_offsets);
3890            {
3891                for (uint32_t i = 0; i < num_base; i++)
3892                {
3893                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3894                    if (die)
3895                    {
3896                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3897                            continue;
3898
3899                        // If we get to here, the die is good, and we should add it:
3900                        if (resolved_dies.find(die) == resolved_dies.end())
3901                        {
3902                            if (ResolveFunction (dwarf_cu, die, sc_list))
3903                                resolved_dies.insert(die);
3904                        }
3905                    }
3906                }
3907            }
3908            die_offsets.clear();
3909        }
3910
3911        if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
3912        {
3913            FindFunctions (name, m_function_selector_index, sc_list);
3914        }
3915
3916    }
3917
3918    // Return the number of variable that were appended to the list
3919    const uint32_t num_matches = sc_list.GetSize() - original_size;
3920
3921    if (log && num_matches > 0)
3922    {
3923        GetObjectFile()->GetModule()->LogMessage (log,
3924                                                  "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list) => %u",
3925                                                  name.GetCString(),
3926                                                  name_type_mask,
3927                                                  append,
3928                                                  num_matches);
3929    }
3930    return num_matches;
3931}
3932
3933uint32_t
3934SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
3935{
3936    Timer scoped_timer (__PRETTY_FUNCTION__,
3937                        "SymbolFileDWARF::FindFunctions (regex = '%s')",
3938                        regex.GetText());
3939
3940    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3941
3942    if (log)
3943    {
3944        GetObjectFile()->GetModule()->LogMessage (log,
3945                                                  "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
3946                                                  regex.GetText(),
3947                                                  append);
3948    }
3949
3950
3951    // If we aren't appending the results to this list, then clear the list
3952    if (!append)
3953        sc_list.Clear();
3954
3955    // Remember how many sc_list are in the list before we search in case
3956    // we are appending the results to a variable list.
3957    uint32_t original_size = sc_list.GetSize();
3958
3959    if (m_using_apple_tables)
3960    {
3961        if (m_apple_names_ap.get())
3962            FindFunctions (regex, *m_apple_names_ap, sc_list);
3963    }
3964    else
3965    {
3966        // Index the DWARF if we haven't already
3967        if (!m_indexed)
3968            Index ();
3969
3970        FindFunctions (regex, m_function_basename_index, sc_list);
3971
3972        FindFunctions (regex, m_function_fullname_index, sc_list);
3973    }
3974
3975    // Return the number of variable that were appended to the list
3976    return sc_list.GetSize() - original_size;
3977}
3978
3979uint32_t
3980SymbolFileDWARF::FindTypes (const SymbolContext& sc,
3981                            const ConstString &name,
3982                            const lldb_private::ClangNamespaceDecl *namespace_decl,
3983                            bool append,
3984                            uint32_t max_matches,
3985                            TypeList& types)
3986{
3987    DWARFDebugInfo* info = DebugInfo();
3988    if (info == NULL)
3989        return 0;
3990
3991    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3992
3993    if (log)
3994    {
3995        if (namespace_decl)
3996            GetObjectFile()->GetModule()->LogMessage (log,
3997                                                      "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
3998                                                      name.GetCString(),
3999                                                      static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4000                                                      namespace_decl->GetQualifiedName().c_str(),
4001                                                      append, max_matches);
4002        else
4003            GetObjectFile()->GetModule()->LogMessage (log,
4004                                                      "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
4005                                                      name.GetCString(), append,
4006                                                      max_matches);
4007    }
4008
4009    // If we aren't appending the results to this list, then clear the list
4010    if (!append)
4011        types.Clear();
4012
4013    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
4014        return 0;
4015
4016    DIEArray die_offsets;
4017
4018    if (m_using_apple_tables)
4019    {
4020        if (m_apple_types_ap.get())
4021        {
4022            const char *name_cstr = name.GetCString();
4023            m_apple_types_ap->FindByName (name_cstr, die_offsets);
4024        }
4025    }
4026    else
4027    {
4028        if (!m_indexed)
4029            Index ();
4030
4031        m_type_index.Find (name, die_offsets);
4032    }
4033
4034    const size_t num_die_matches = die_offsets.size();
4035
4036    if (num_die_matches)
4037    {
4038        const uint32_t initial_types_size = types.GetSize();
4039        DWARFCompileUnit* dwarf_cu = NULL;
4040        const DWARFDebugInfoEntry* die = NULL;
4041        DWARFDebugInfo* debug_info = DebugInfo();
4042        for (size_t i=0; i<num_die_matches; ++i)
4043        {
4044            const dw_offset_t die_offset = die_offsets[i];
4045            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4046
4047            if (die)
4048            {
4049                if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4050                    continue;
4051
4052                Type *matching_type = ResolveType (dwarf_cu, die);
4053                if (matching_type)
4054                {
4055                    // We found a type pointer, now find the shared pointer form our type list
4056                    types.InsertUnique (matching_type->shared_from_this());
4057                    if (types.GetSize() >= max_matches)
4058                        break;
4059                }
4060            }
4061            else
4062            {
4063                if (m_using_apple_tables)
4064                {
4065                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4066                                                                               die_offset, name.GetCString());
4067                }
4068            }
4069
4070        }
4071        const uint32_t num_matches = types.GetSize() - initial_types_size;
4072        if (log && num_matches)
4073        {
4074            if (namespace_decl)
4075            {
4076                GetObjectFile()->GetModule()->LogMessage (log,
4077                                                          "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4078                                                          name.GetCString(),
4079                                                          static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4080                                                          namespace_decl->GetQualifiedName().c_str(),
4081                                                          append, max_matches,
4082                                                          num_matches);
4083            }
4084            else
4085            {
4086                GetObjectFile()->GetModule()->LogMessage (log,
4087                                                          "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4088                                                          name.GetCString(),
4089                                                          append, max_matches,
4090                                                          num_matches);
4091            }
4092        }
4093        return num_matches;
4094    }
4095    return 0;
4096}
4097
4098
4099ClangNamespaceDecl
4100SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4101                                const ConstString &name,
4102                                const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4103{
4104    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4105
4106    if (log)
4107    {
4108        GetObjectFile()->GetModule()->LogMessage (log,
4109                                                  "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4110                                                  name.GetCString());
4111    }
4112
4113    if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4114        return ClangNamespaceDecl();
4115
4116    ClangNamespaceDecl namespace_decl;
4117    DWARFDebugInfo* info = DebugInfo();
4118    if (info)
4119    {
4120        DIEArray die_offsets;
4121
4122        // Index if we already haven't to make sure the compile units
4123        // get indexed and make their global DIE index list
4124        if (m_using_apple_tables)
4125        {
4126            if (m_apple_namespaces_ap.get())
4127            {
4128                const char *name_cstr = name.GetCString();
4129                m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4130            }
4131        }
4132        else
4133        {
4134            if (!m_indexed)
4135                Index ();
4136
4137            m_namespace_index.Find (name, die_offsets);
4138        }
4139
4140        DWARFCompileUnit* dwarf_cu = NULL;
4141        const DWARFDebugInfoEntry* die = NULL;
4142        const size_t num_matches = die_offsets.size();
4143        if (num_matches)
4144        {
4145            DWARFDebugInfo* debug_info = DebugInfo();
4146            for (size_t i=0; i<num_matches; ++i)
4147            {
4148                const dw_offset_t die_offset = die_offsets[i];
4149                die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4150
4151                if (die)
4152                {
4153                    if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4154                        continue;
4155
4156                    clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4157                    if (clang_namespace_decl)
4158                    {
4159                        namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4160                        namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4161                        break;
4162                    }
4163                }
4164                else
4165                {
4166                    if (m_using_apple_tables)
4167                    {
4168                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4169                                                                   die_offset, name.GetCString());
4170                    }
4171                }
4172
4173            }
4174        }
4175    }
4176    if (log && namespace_decl.GetNamespaceDecl())
4177    {
4178        GetObjectFile()->GetModule()->LogMessage (log,
4179                                                  "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4180                                                  name.GetCString(),
4181                                                  static_cast<const void*>(namespace_decl.GetNamespaceDecl()),
4182                                                  namespace_decl.GetQualifiedName().c_str());
4183    }
4184
4185    return namespace_decl;
4186}
4187
4188uint32_t
4189SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4190{
4191    // Remember how many sc_list are in the list before we search in case
4192    // we are appending the results to a variable list.
4193    uint32_t original_size = types.GetSize();
4194
4195    const uint32_t num_die_offsets = die_offsets.size();
4196    // Parse all of the types we found from the pubtypes matches
4197    uint32_t i;
4198    uint32_t num_matches = 0;
4199    for (i = 0; i < num_die_offsets; ++i)
4200    {
4201        Type *matching_type = ResolveTypeUID (die_offsets[i]);
4202        if (matching_type)
4203        {
4204            // We found a type pointer, now find the shared pointer form our type list
4205            types.InsertUnique (matching_type->shared_from_this());
4206            ++num_matches;
4207            if (num_matches >= max_matches)
4208                break;
4209        }
4210    }
4211
4212    // Return the number of variable that were appended to the list
4213    return types.GetSize() - original_size;
4214}
4215
4216
4217size_t
4218SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4219                                       clang::DeclContext *containing_decl_ctx,
4220                                       DWARFCompileUnit* dwarf_cu,
4221                                       const DWARFDebugInfoEntry *parent_die,
4222                                       bool skip_artificial,
4223                                       bool &is_static,
4224                                       bool &is_variadic,
4225                                       TypeList* type_list,
4226                                       std::vector<ClangASTType>& function_param_types,
4227                                       std::vector<clang::ParmVarDecl*>& function_param_decls,
4228                                       unsigned &type_quals) // ,
4229                                       // ClangASTContext::TemplateParameterInfos &template_param_infos))
4230{
4231    if (parent_die == NULL)
4232        return 0;
4233
4234    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4235
4236    size_t arg_idx = 0;
4237    const DWARFDebugInfoEntry *die;
4238    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4239    {
4240        dw_tag_t tag = die->Tag();
4241        switch (tag)
4242        {
4243        case DW_TAG_formal_parameter:
4244            {
4245                DWARFDebugInfoEntry::Attributes attributes;
4246                const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4247                if (num_attributes > 0)
4248                {
4249                    const char *name = NULL;
4250                    Declaration decl;
4251                    dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4252                    bool is_artificial = false;
4253                    // one of None, Auto, Register, Extern, Static, PrivateExtern
4254
4255                    clang::StorageClass storage = clang::SC_None;
4256                    uint32_t i;
4257                    for (i=0; i<num_attributes; ++i)
4258                    {
4259                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
4260                        DWARFFormValue form_value;
4261                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4262                        {
4263                            switch (attr)
4264                            {
4265                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4266                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4267                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4268                            case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
4269                            case DW_AT_type:        param_type_die_offset = form_value.Reference(dwarf_cu); break;
4270                            case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
4271                            case DW_AT_location:
4272    //                          if (form_value.BlockData())
4273    //                          {
4274    //                              const DWARFDataExtractor& debug_info_data = debug_info();
4275    //                              uint32_t block_length = form_value.Unsigned();
4276    //                              DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4277    //                          }
4278    //                          else
4279    //                          {
4280    //                          }
4281    //                          break;
4282                            case DW_AT_const_value:
4283                            case DW_AT_default_value:
4284                            case DW_AT_description:
4285                            case DW_AT_endianity:
4286                            case DW_AT_is_optional:
4287                            case DW_AT_segment:
4288                            case DW_AT_variable_parameter:
4289                            default:
4290                            case DW_AT_abstract_origin:
4291                            case DW_AT_sibling:
4292                                break;
4293                            }
4294                        }
4295                    }
4296
4297                    bool skip = false;
4298                    if (skip_artificial)
4299                    {
4300                        if (is_artificial)
4301                        {
4302                            // In order to determine if a C++ member function is
4303                            // "const" we have to look at the const-ness of "this"...
4304                            // Ugly, but that
4305                            if (arg_idx == 0)
4306                            {
4307                                if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4308                                {
4309                                    // Often times compilers omit the "this" name for the
4310                                    // specification DIEs, so we can't rely upon the name
4311                                    // being in the formal parameter DIE...
4312                                    if (name == NULL || ::strcmp(name, "this")==0)
4313                                    {
4314                                        Type *this_type = ResolveTypeUID (param_type_die_offset);
4315                                        if (this_type)
4316                                        {
4317                                            uint32_t encoding_mask = this_type->GetEncodingMask();
4318                                            if (encoding_mask & Type::eEncodingIsPointerUID)
4319                                            {
4320                                                is_static = false;
4321
4322                                                if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4323                                                    type_quals |= clang::Qualifiers::Const;
4324                                                if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4325                                                    type_quals |= clang::Qualifiers::Volatile;
4326                                            }
4327                                        }
4328                                    }
4329                                }
4330                            }
4331                            skip = true;
4332                        }
4333                        else
4334                        {
4335
4336                            // HACK: Objective C formal parameters "self" and "_cmd"
4337                            // are not marked as artificial in the DWARF...
4338                            CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4339                            if (comp_unit)
4340                            {
4341                                switch (comp_unit->GetLanguage())
4342                                {
4343                                    case eLanguageTypeObjC:
4344                                    case eLanguageTypeObjC_plus_plus:
4345                                        if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4346                                            skip = true;
4347                                        break;
4348                                    default:
4349                                        break;
4350                                }
4351                            }
4352                        }
4353                    }
4354
4355                    if (!skip)
4356                    {
4357                        Type *type = ResolveTypeUID(param_type_die_offset);
4358                        if (type)
4359                        {
4360                            function_param_types.push_back (type->GetClangForwardType());
4361
4362                            clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4363                                                                                                                  type->GetClangForwardType(),
4364                                                                                                                  storage);
4365                            assert(param_var_decl);
4366                            function_param_decls.push_back(param_var_decl);
4367
4368                            GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4369                        }
4370                    }
4371                }
4372                arg_idx++;
4373            }
4374            break;
4375
4376        case DW_TAG_unspecified_parameters:
4377            is_variadic = true;
4378            break;
4379
4380        case DW_TAG_template_type_parameter:
4381        case DW_TAG_template_value_parameter:
4382            // The one caller of this was never using the template_param_infos,
4383            // and the local variable was taking up a large amount of stack space
4384            // in SymbolFileDWARF::ParseType() so this was removed. If we ever need
4385            // the template params back, we can add them back.
4386            // ParseTemplateDIE (dwarf_cu, die, template_param_infos);
4387            break;
4388
4389        default:
4390            break;
4391        }
4392    }
4393    return arg_idx;
4394}
4395
4396size_t
4397SymbolFileDWARF::ParseChildEnumerators
4398(
4399    const SymbolContext& sc,
4400    lldb_private::ClangASTType &clang_type,
4401    bool is_signed,
4402    uint32_t enumerator_byte_size,
4403    DWARFCompileUnit* dwarf_cu,
4404    const DWARFDebugInfoEntry *parent_die
4405)
4406{
4407    if (parent_die == NULL)
4408        return 0;
4409
4410    size_t enumerators_added = 0;
4411    const DWARFDebugInfoEntry *die;
4412    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4413
4414    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4415    {
4416        const dw_tag_t tag = die->Tag();
4417        if (tag == DW_TAG_enumerator)
4418        {
4419            DWARFDebugInfoEntry::Attributes attributes;
4420            const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4421            if (num_child_attributes > 0)
4422            {
4423                const char *name = NULL;
4424                bool got_value = false;
4425                int64_t enum_value = 0;
4426                Declaration decl;
4427
4428                uint32_t i;
4429                for (i=0; i<num_child_attributes; ++i)
4430                {
4431                    const dw_attr_t attr = attributes.AttributeAtIndex(i);
4432                    DWARFFormValue form_value;
4433                    if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4434                    {
4435                        switch (attr)
4436                        {
4437                        case DW_AT_const_value:
4438                            got_value = true;
4439                            if (is_signed)
4440                                enum_value = form_value.Signed();
4441                            else
4442                                enum_value = form_value.Unsigned();
4443                            break;
4444
4445                        case DW_AT_name:
4446                            name = form_value.AsCString(&get_debug_str_data());
4447                            break;
4448
4449                        case DW_AT_description:
4450                        default:
4451                        case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4452                        case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4453                        case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4454                        case DW_AT_sibling:
4455                            break;
4456                        }
4457                    }
4458                }
4459
4460                if (name && name[0] && got_value)
4461                {
4462                    clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4463                                                                     decl,
4464                                                                     name,
4465                                                                     enum_value,
4466                                                                     enumerator_byte_size * 8);
4467                    ++enumerators_added;
4468                }
4469            }
4470        }
4471    }
4472    return enumerators_added;
4473}
4474
4475void
4476SymbolFileDWARF::ParseChildArrayInfo
4477(
4478    const SymbolContext& sc,
4479    DWARFCompileUnit* dwarf_cu,
4480    const DWARFDebugInfoEntry *parent_die,
4481    int64_t& first_index,
4482    std::vector<uint64_t>& element_orders,
4483    uint32_t& byte_stride,
4484    uint32_t& bit_stride
4485)
4486{
4487    if (parent_die == NULL)
4488        return;
4489
4490    const DWARFDebugInfoEntry *die;
4491    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4492    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4493    {
4494        const dw_tag_t tag = die->Tag();
4495        switch (tag)
4496        {
4497        case DW_TAG_subrange_type:
4498            {
4499                DWARFDebugInfoEntry::Attributes attributes;
4500                const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4501                if (num_child_attributes > 0)
4502                {
4503                    uint64_t num_elements = 0;
4504                    uint64_t lower_bound = 0;
4505                    uint64_t upper_bound = 0;
4506                    bool upper_bound_valid = false;
4507                    uint32_t i;
4508                    for (i=0; i<num_child_attributes; ++i)
4509                    {
4510                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
4511                        DWARFFormValue form_value;
4512                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4513                        {
4514                            switch (attr)
4515                            {
4516                            case DW_AT_name:
4517                                break;
4518
4519                            case DW_AT_count:
4520                                num_elements = form_value.Unsigned();
4521                                break;
4522
4523                            case DW_AT_bit_stride:
4524                                bit_stride = form_value.Unsigned();
4525                                break;
4526
4527                            case DW_AT_byte_stride:
4528                                byte_stride = form_value.Unsigned();
4529                                break;
4530
4531                            case DW_AT_lower_bound:
4532                                lower_bound = form_value.Unsigned();
4533                                break;
4534
4535                            case DW_AT_upper_bound:
4536                                upper_bound_valid = true;
4537                                upper_bound = form_value.Unsigned();
4538                                break;
4539
4540                            default:
4541                            case DW_AT_abstract_origin:
4542                            case DW_AT_accessibility:
4543                            case DW_AT_allocated:
4544                            case DW_AT_associated:
4545                            case DW_AT_data_location:
4546                            case DW_AT_declaration:
4547                            case DW_AT_description:
4548                            case DW_AT_sibling:
4549                            case DW_AT_threads_scaled:
4550                            case DW_AT_type:
4551                            case DW_AT_visibility:
4552                                break;
4553                            }
4554                        }
4555                    }
4556
4557                    if (num_elements == 0)
4558                    {
4559                        if (upper_bound_valid && upper_bound >= lower_bound)
4560                            num_elements = upper_bound - lower_bound + 1;
4561                    }
4562
4563                    element_orders.push_back (num_elements);
4564                }
4565            }
4566            break;
4567        }
4568    }
4569}
4570
4571TypeSP
4572SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4573{
4574    TypeSP type_sp;
4575    if (die != NULL)
4576    {
4577        assert(dwarf_cu != NULL);
4578        Type *type_ptr = m_die_to_type.lookup (die);
4579        if (type_ptr == NULL)
4580        {
4581            CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4582            assert (lldb_cu);
4583            SymbolContext sc(lldb_cu);
4584            type_sp = ParseType(sc, dwarf_cu, die, NULL);
4585        }
4586        else if (type_ptr != DIE_IS_BEING_PARSED)
4587        {
4588            // Grab the existing type from the master types lists
4589            type_sp = type_ptr->shared_from_this();
4590        }
4591
4592    }
4593    return type_sp;
4594}
4595
4596clang::DeclContext *
4597SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4598{
4599    if (die_offset != DW_INVALID_OFFSET)
4600    {
4601        DWARFCompileUnitSP cu_sp;
4602        const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4603        return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4604    }
4605    return NULL;
4606}
4607
4608clang::DeclContext *
4609SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4610{
4611    if (die_offset != DW_INVALID_OFFSET)
4612    {
4613        DWARFDebugInfo* debug_info = DebugInfo();
4614        if (debug_info)
4615        {
4616            DWARFCompileUnitSP cu_sp;
4617            const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4618            if (die)
4619                return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4620        }
4621    }
4622    return NULL;
4623}
4624
4625clang::NamespaceDecl *
4626SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4627{
4628    if (die && die->Tag() == DW_TAG_namespace)
4629    {
4630        // See if we already parsed this namespace DIE and associated it with a
4631        // uniqued namespace declaration
4632        clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4633        if (namespace_decl)
4634            return namespace_decl;
4635        else
4636        {
4637            const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4638            clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4639            namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4640            Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4641            if (log)
4642            {
4643                if (namespace_name)
4644                {
4645                    GetObjectFile()->GetModule()->LogMessage (log,
4646                                                              "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4647                                                              static_cast<void*>(GetClangASTContext().getASTContext()),
4648                                                              MakeUserID(die->GetOffset()),
4649                                                              namespace_name,
4650                                                              static_cast<void*>(namespace_decl),
4651                                                              static_cast<void*>(namespace_decl->getOriginalNamespace()));
4652                }
4653                else
4654                {
4655                    GetObjectFile()->GetModule()->LogMessage (log,
4656                                                              "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4657                                                              static_cast<void*>(GetClangASTContext().getASTContext()),
4658                                                              MakeUserID(die->GetOffset()),
4659                                                              static_cast<void*>(namespace_decl),
4660                                                              static_cast<void*>(namespace_decl->getOriginalNamespace()));
4661                }
4662            }
4663
4664            if (namespace_decl)
4665                LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4666            return namespace_decl;
4667        }
4668    }
4669    return NULL;
4670}
4671
4672clang::DeclContext *
4673SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4674{
4675    clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4676    if (clang_decl_ctx)
4677        return clang_decl_ctx;
4678    // If this DIE has a specification, or an abstract origin, then trace to those.
4679
4680    dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4681    if (die_offset != DW_INVALID_OFFSET)
4682        return GetClangDeclContextForDIEOffset (sc, die_offset);
4683
4684    die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4685    if (die_offset != DW_INVALID_OFFSET)
4686        return GetClangDeclContextForDIEOffset (sc, die_offset);
4687
4688    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4689    if (log)
4690        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));
4691    // This is the DIE we want.  Parse it, then query our map.
4692    bool assert_not_being_parsed = true;
4693    ResolveTypeUID (cu, die, assert_not_being_parsed);
4694
4695    clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4696
4697    return clang_decl_ctx;
4698}
4699
4700clang::DeclContext *
4701SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4702{
4703    if (m_clang_tu_decl == NULL)
4704        m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4705
4706    const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4707
4708    if (decl_ctx_die_copy)
4709        *decl_ctx_die_copy = decl_ctx_die;
4710
4711    if (decl_ctx_die)
4712    {
4713
4714        DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4715        if (pos != m_die_to_decl_ctx.end())
4716            return pos->second;
4717
4718        switch (decl_ctx_die->Tag())
4719        {
4720        case DW_TAG_compile_unit:
4721            return m_clang_tu_decl;
4722
4723        case DW_TAG_namespace:
4724            return ResolveNamespaceDIE (cu, decl_ctx_die);
4725            break;
4726
4727        case DW_TAG_structure_type:
4728        case DW_TAG_union_type:
4729        case DW_TAG_class_type:
4730            {
4731                Type* type = ResolveType (cu, decl_ctx_die);
4732                if (type)
4733                {
4734                    clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4735                    if (decl_ctx)
4736                    {
4737                        LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4738                        if (decl_ctx)
4739                            return decl_ctx;
4740                    }
4741                }
4742            }
4743            break;
4744
4745        default:
4746            break;
4747        }
4748    }
4749    return m_clang_tu_decl;
4750}
4751
4752
4753const DWARFDebugInfoEntry *
4754SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4755{
4756    if (cu && die)
4757    {
4758        const DWARFDebugInfoEntry * const decl_die = die;
4759
4760        while (die != NULL)
4761        {
4762            // If this is the original DIE that we are searching for a declaration
4763            // for, then don't look in the cache as we don't want our own decl
4764            // context to be our decl context...
4765            if (decl_die != die)
4766            {
4767                switch (die->Tag())
4768                {
4769                    case DW_TAG_compile_unit:
4770                    case DW_TAG_namespace:
4771                    case DW_TAG_structure_type:
4772                    case DW_TAG_union_type:
4773                    case DW_TAG_class_type:
4774                        return die;
4775
4776                    default:
4777                        break;
4778                }
4779            }
4780
4781            dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4782            if (die_offset != DW_INVALID_OFFSET)
4783            {
4784                DWARFCompileUnit *spec_cu = cu;
4785                const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4786                const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4787                if (spec_die_decl_ctx_die)
4788                    return spec_die_decl_ctx_die;
4789            }
4790
4791            die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4792            if (die_offset != DW_INVALID_OFFSET)
4793            {
4794                DWARFCompileUnit *abs_cu = cu;
4795                const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4796                const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4797                if (abs_die_decl_ctx_die)
4798                    return abs_die_decl_ctx_die;
4799            }
4800
4801            die = die->GetParent();
4802        }
4803    }
4804    return NULL;
4805}
4806
4807
4808Symbol *
4809SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
4810{
4811    Symbol *objc_class_symbol = NULL;
4812    if (m_obj_file)
4813    {
4814        Symtab *symtab = m_obj_file->GetSymtab ();
4815        if (symtab)
4816        {
4817            objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
4818                                                                        eSymbolTypeObjCClass,
4819                                                                        Symtab::eDebugNo,
4820                                                                        Symtab::eVisibilityAny);
4821        }
4822    }
4823    return objc_class_symbol;
4824}
4825
4826// Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
4827// then we can end up looking through all class types for a complete type and never find
4828// the full definition. We need to know if this attribute is supported, so we determine
4829// this here and cache th result. We also need to worry about the debug map DWARF file
4830// if we are doing darwin DWARF in .o file debugging.
4831bool
4832SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
4833{
4834    if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
4835    {
4836        m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
4837        if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
4838            m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4839        else
4840        {
4841            DWARFDebugInfo* debug_info = DebugInfo();
4842            const uint32_t num_compile_units = GetNumCompileUnits();
4843            for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
4844            {
4845                DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
4846                if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
4847                {
4848                    m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4849                    break;
4850                }
4851            }
4852        }
4853        if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
4854            return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
4855    }
4856    return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
4857}
4858
4859// This function can be used when a DIE is found that is a forward declaration
4860// DIE and we want to try and find a type that has the complete definition.
4861TypeSP
4862SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
4863                                                       const ConstString &type_name,
4864                                                       bool must_be_implementation)
4865{
4866
4867    TypeSP type_sp;
4868
4869    if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
4870        return type_sp;
4871
4872    DIEArray die_offsets;
4873
4874    if (m_using_apple_tables)
4875    {
4876        if (m_apple_types_ap.get())
4877        {
4878            const char *name_cstr = type_name.GetCString();
4879            m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
4880        }
4881    }
4882    else
4883    {
4884        if (!m_indexed)
4885            Index ();
4886
4887        m_type_index.Find (type_name, die_offsets);
4888    }
4889
4890    const size_t num_matches = die_offsets.size();
4891
4892    DWARFCompileUnit* type_cu = NULL;
4893    const DWARFDebugInfoEntry* type_die = NULL;
4894    if (num_matches)
4895    {
4896        DWARFDebugInfo* debug_info = DebugInfo();
4897        for (size_t i=0; i<num_matches; ++i)
4898        {
4899            const dw_offset_t die_offset = die_offsets[i];
4900            type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4901
4902            if (type_die)
4903            {
4904                bool try_resolving_type = false;
4905
4906                // Don't try and resolve the DIE we are looking for with the DIE itself!
4907                if (type_die != die)
4908                {
4909                    switch (type_die->Tag())
4910                    {
4911                        case DW_TAG_class_type:
4912                        case DW_TAG_structure_type:
4913                            try_resolving_type = true;
4914                            break;
4915                        default:
4916                            break;
4917                    }
4918                }
4919
4920                if (try_resolving_type)
4921                {
4922                    if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
4923                        try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
4924
4925                    if (try_resolving_type)
4926                    {
4927                        Type *resolved_type = ResolveType (type_cu, type_die, false);
4928                        if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4929                        {
4930                            DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
4931                                          MakeUserID(die->GetOffset()),
4932                                          m_obj_file->GetFileSpec().GetFilename().AsCString(),
4933                                          MakeUserID(type_die->GetOffset()),
4934                                          MakeUserID(type_cu->GetOffset()));
4935
4936                            if (die)
4937                                m_die_to_type[die] = resolved_type;
4938                            type_sp = resolved_type->shared_from_this();
4939                            break;
4940                        }
4941                    }
4942                }
4943            }
4944            else
4945            {
4946                if (m_using_apple_tables)
4947                {
4948                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4949                                                               die_offset, type_name.GetCString());
4950                }
4951            }
4952
4953        }
4954    }
4955    return type_sp;
4956}
4957
4958
4959//----------------------------------------------------------------------
4960// This function helps to ensure that the declaration contexts match for
4961// two different DIEs. Often times debug information will refer to a
4962// forward declaration of a type (the equivalent of "struct my_struct;".
4963// There will often be a declaration of that type elsewhere that has the
4964// full definition. When we go looking for the full type "my_struct", we
4965// will find one or more matches in the accelerator tables and we will
4966// then need to make sure the type was in the same declaration context
4967// as the original DIE. This function can efficiently compare two DIEs
4968// and will return true when the declaration context matches, and false
4969// when they don't.
4970//----------------------------------------------------------------------
4971bool
4972SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
4973                                       DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
4974{
4975    if (die1 == die2)
4976        return true;
4977
4978#if defined (LLDB_CONFIGURATION_DEBUG)
4979    // You can't and shouldn't call this function with a compile unit from
4980    // two different SymbolFileDWARF instances.
4981    assert (DebugInfo()->ContainsCompileUnit (cu1));
4982    assert (DebugInfo()->ContainsCompileUnit (cu2));
4983#endif
4984
4985    DWARFDIECollection decl_ctx_1;
4986    DWARFDIECollection decl_ctx_2;
4987    //The declaration DIE stack is a stack of the declaration context
4988    // DIEs all the way back to the compile unit. If a type "T" is
4989    // declared inside a class "B", and class "B" is declared inside
4990    // a class "A" and class "A" is in a namespace "lldb", and the
4991    // namespace is in a compile unit, there will be a stack of DIEs:
4992    //
4993    //   [0] DW_TAG_class_type for "B"
4994    //   [1] DW_TAG_class_type for "A"
4995    //   [2] DW_TAG_namespace  for "lldb"
4996    //   [3] DW_TAG_compile_unit for the source file.
4997    //
4998    // We grab both contexts and make sure that everything matches
4999    // all the way back to the compiler unit.
5000
5001    // First lets grab the decl contexts for both DIEs
5002    die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
5003    die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
5004    // Make sure the context arrays have the same size, otherwise
5005    // we are done
5006    const size_t count1 = decl_ctx_1.Size();
5007    const size_t count2 = decl_ctx_2.Size();
5008    if (count1 != count2)
5009        return false;
5010
5011    // Make sure the DW_TAG values match all the way back up the
5012    // compile unit. If they don't, then we are done.
5013    const DWARFDebugInfoEntry *decl_ctx_die1;
5014    const DWARFDebugInfoEntry *decl_ctx_die2;
5015    size_t i;
5016    for (i=0; i<count1; i++)
5017    {
5018        decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5019        decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5020        if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
5021            return false;
5022    }
5023#if defined LLDB_CONFIGURATION_DEBUG
5024
5025    // Make sure the top item in the decl context die array is always
5026    // DW_TAG_compile_unit. If it isn't then something went wrong in
5027    // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
5028    assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
5029
5030#endif
5031    // Always skip the compile unit when comparing by only iterating up to
5032    // "count - 1". Here we compare the names as we go.
5033    for (i=0; i<count1 - 1; i++)
5034    {
5035        decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5036        decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5037        const char *name1 = decl_ctx_die1->GetName(this, cu1);
5038        const char *name2 = decl_ctx_die2->GetName(this, cu2);
5039        // If the string was from a DW_FORM_strp, then the pointer will often
5040        // be the same!
5041        if (name1 == name2)
5042            continue;
5043
5044        // Name pointers are not equal, so only compare the strings
5045        // if both are not NULL.
5046        if (name1 && name2)
5047        {
5048            // If the strings don't compare, we are done...
5049            if (strcmp(name1, name2) != 0)
5050                return false;
5051        }
5052        else
5053        {
5054            // One name was NULL while the other wasn't
5055            return false;
5056        }
5057    }
5058    // We made it through all of the checks and the declaration contexts
5059    // are equal.
5060    return true;
5061}
5062
5063// This function can be used when a DIE is found that is a forward declaration
5064// DIE and we want to try and find a type that has the complete definition.
5065// "cu" and "die" must be from this SymbolFileDWARF
5066TypeSP
5067SymbolFileDWARF::FindDefinitionTypeForDIE (DWARFCompileUnit* cu,
5068                                           const DWARFDebugInfoEntry *die,
5069                                           const ConstString &type_name)
5070{
5071    TypeSP type_sp;
5072
5073#if defined (LLDB_CONFIGURATION_DEBUG)
5074    // You can't and shouldn't call this function with a compile unit from
5075    // another SymbolFileDWARF instance.
5076    assert (DebugInfo()->ContainsCompileUnit (cu));
5077#endif
5078
5079    if (cu == NULL || die == NULL || !type_name)
5080        return type_sp;
5081
5082    std::string qualified_name;
5083
5084    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5085    if (log)
5086    {
5087        die->GetQualifiedName(this, cu, qualified_name);
5088        GetObjectFile()->GetModule()->LogMessage (log,
5089                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x (%s), name='%s')",
5090                                                  die->GetOffset(),
5091                                                  qualified_name.c_str(),
5092                                                  type_name.GetCString());
5093    }
5094
5095    DIEArray die_offsets;
5096
5097    if (m_using_apple_tables)
5098    {
5099        if (m_apple_types_ap.get())
5100        {
5101            const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5102            const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5103            if (has_tag && has_qualified_name_hash)
5104            {
5105                if (qualified_name.empty())
5106                    die->GetQualifiedName(this, cu, qualified_name);
5107
5108                const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name.c_str());
5109                if (log)
5110                    GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5111                m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), die->Tag(), qualified_name_hash, die_offsets);
5112            }
5113            else if (has_tag)
5114            {
5115                if (log)
5116                    GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5117                m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), die->Tag(), die_offsets);
5118            }
5119            else
5120            {
5121                m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5122            }
5123        }
5124    }
5125    else
5126    {
5127        if (!m_indexed)
5128            Index ();
5129
5130        m_type_index.Find (type_name, die_offsets);
5131    }
5132
5133    const size_t num_matches = die_offsets.size();
5134
5135    const dw_tag_t die_tag = die->Tag();
5136
5137    DWARFCompileUnit* type_cu = NULL;
5138    const DWARFDebugInfoEntry* type_die = NULL;
5139    if (num_matches)
5140    {
5141        DWARFDebugInfo* debug_info = DebugInfo();
5142        for (size_t i=0; i<num_matches; ++i)
5143        {
5144            const dw_offset_t die_offset = die_offsets[i];
5145            type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5146
5147            if (type_die)
5148            {
5149                bool try_resolving_type = false;
5150
5151                // Don't try and resolve the DIE we are looking for with the DIE itself!
5152                if (type_die != die)
5153                {
5154                    const dw_tag_t type_die_tag = type_die->Tag();
5155                    // Make sure the tags match
5156                    if (type_die_tag == die_tag)
5157                    {
5158                        // The tags match, lets try resolving this type
5159                        try_resolving_type = true;
5160                    }
5161                    else
5162                    {
5163                        // The tags don't match, but we need to watch our for a
5164                        // forward declaration for a struct and ("struct foo")
5165                        // ends up being a class ("class foo { ... };") or
5166                        // vice versa.
5167                        switch (type_die_tag)
5168                        {
5169                        case DW_TAG_class_type:
5170                            // We had a "class foo", see if we ended up with a "struct foo { ... };"
5171                            try_resolving_type = (die_tag == DW_TAG_structure_type);
5172                            break;
5173                        case DW_TAG_structure_type:
5174                            // We had a "struct foo", see if we ended up with a "class foo { ... };"
5175                            try_resolving_type = (die_tag == DW_TAG_class_type);
5176                            break;
5177                        default:
5178                            // Tags don't match, don't event try to resolve
5179                            // using this type whose name matches....
5180                            break;
5181                        }
5182                    }
5183                }
5184
5185                if (try_resolving_type)
5186                {
5187                    if (log)
5188                    {
5189                        std::string qualified_name;
5190                        type_die->GetQualifiedName(this, cu, qualified_name);
5191                        GetObjectFile()->GetModule()->LogMessage (log,
5192                                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') trying die=0x%8.8x (%s)",
5193                                                                  die->GetOffset(),
5194                                                                  type_name.GetCString(),
5195                                                                  type_die->GetOffset(),
5196                                                                  qualified_name.c_str());
5197                    }
5198
5199                    // Make sure the decl contexts match all the way up
5200                    if (DIEDeclContextsMatch(cu, die, type_cu, type_die))
5201                    {
5202                        Type *resolved_type = ResolveType (type_cu, type_die, false);
5203                        if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5204                        {
5205                            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",
5206                                          MakeUserID(die->GetOffset()),
5207                                          MakeUserID(cu->GetOffset()),
5208                                          m_obj_file->GetFileSpec().GetFilename().AsCString(),
5209                                          MakeUserID(type_die->GetOffset()),
5210                                          MakeUserID(type_cu->GetOffset()));
5211
5212                            m_die_to_type[die] = resolved_type;
5213                            type_sp = resolved_type->shared_from_this();
5214                            break;
5215                        }
5216                    }
5217                }
5218                else
5219                {
5220                    if (log)
5221                    {
5222                        std::string qualified_name;
5223                        type_die->GetQualifiedName(this, cu, qualified_name);
5224                        GetObjectFile()->GetModule()->LogMessage (log,
5225                                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') ignoring die=0x%8.8x (%s)",
5226                                                                  die->GetOffset(),
5227                                                                  type_name.GetCString(),
5228                                                                  type_die->GetOffset(),
5229                                                                  qualified_name.c_str());
5230                    }
5231                }
5232            }
5233            else
5234            {
5235                if (m_using_apple_tables)
5236                {
5237                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5238                                                                               die_offset, type_name.GetCString());
5239                }
5240            }
5241
5242        }
5243    }
5244    return type_sp;
5245}
5246
5247TypeSP
5248SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5249{
5250    TypeSP type_sp;
5251
5252    const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5253    if (dwarf_decl_ctx_count > 0)
5254    {
5255        const ConstString type_name(dwarf_decl_ctx[0].name);
5256        const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5257
5258        if (type_name)
5259        {
5260            Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5261            if (log)
5262            {
5263                GetObjectFile()->GetModule()->LogMessage (log,
5264                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5265                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5266                                                          dwarf_decl_ctx.GetQualifiedName());
5267            }
5268
5269            DIEArray die_offsets;
5270
5271            if (m_using_apple_tables)
5272            {
5273                if (m_apple_types_ap.get())
5274                {
5275                    const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5276                    const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5277                    if (has_tag && has_qualified_name_hash)
5278                    {
5279                        const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5280                        const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5281                        if (log)
5282                            GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5283                        m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5284                    }
5285                    else if (has_tag)
5286                    {
5287                        if (log)
5288                            GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5289                        m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5290                    }
5291                    else
5292                    {
5293                        m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5294                    }
5295                }
5296            }
5297            else
5298            {
5299                if (!m_indexed)
5300                    Index ();
5301
5302                m_type_index.Find (type_name, die_offsets);
5303            }
5304
5305            const size_t num_matches = die_offsets.size();
5306
5307
5308            DWARFCompileUnit* type_cu = NULL;
5309            const DWARFDebugInfoEntry* type_die = NULL;
5310            if (num_matches)
5311            {
5312                DWARFDebugInfo* debug_info = DebugInfo();
5313                for (size_t i=0; i<num_matches; ++i)
5314                {
5315                    const dw_offset_t die_offset = die_offsets[i];
5316                    type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5317
5318                    if (type_die)
5319                    {
5320                        bool try_resolving_type = false;
5321
5322                        // Don't try and resolve the DIE we are looking for with the DIE itself!
5323                        const dw_tag_t type_tag = type_die->Tag();
5324                        // Make sure the tags match
5325                        if (type_tag == tag)
5326                        {
5327                            // The tags match, lets try resolving this type
5328                            try_resolving_type = true;
5329                        }
5330                        else
5331                        {
5332                            // The tags don't match, but we need to watch our for a
5333                            // forward declaration for a struct and ("struct foo")
5334                            // ends up being a class ("class foo { ... };") or
5335                            // vice versa.
5336                            switch (type_tag)
5337                            {
5338                                case DW_TAG_class_type:
5339                                    // We had a "class foo", see if we ended up with a "struct foo { ... };"
5340                                    try_resolving_type = (tag == DW_TAG_structure_type);
5341                                    break;
5342                                case DW_TAG_structure_type:
5343                                    // We had a "struct foo", see if we ended up with a "class foo { ... };"
5344                                    try_resolving_type = (tag == DW_TAG_class_type);
5345                                    break;
5346                                default:
5347                                    // Tags don't match, don't event try to resolve
5348                                    // using this type whose name matches....
5349                                    break;
5350                            }
5351                        }
5352
5353                        if (try_resolving_type)
5354                        {
5355                            DWARFDeclContext type_dwarf_decl_ctx;
5356                            type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5357
5358                            if (log)
5359                            {
5360                                GetObjectFile()->GetModule()->LogMessage (log,
5361                                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5362                                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5363                                                                          dwarf_decl_ctx.GetQualifiedName(),
5364                                                                          type_die->GetOffset(),
5365                                                                          type_dwarf_decl_ctx.GetQualifiedName());
5366                            }
5367
5368                            // Make sure the decl contexts match all the way up
5369                            if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5370                            {
5371                                Type *resolved_type = ResolveType (type_cu, type_die, false);
5372                                if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5373                                {
5374                                    type_sp = resolved_type->shared_from_this();
5375                                    break;
5376                                }
5377                            }
5378                        }
5379                        else
5380                        {
5381                            if (log)
5382                            {
5383                                std::string qualified_name;
5384                                type_die->GetQualifiedName(this, type_cu, qualified_name);
5385                                GetObjectFile()->GetModule()->LogMessage (log,
5386                                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5387                                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5388                                                                          dwarf_decl_ctx.GetQualifiedName(),
5389                                                                          type_die->GetOffset(),
5390                                                                          qualified_name.c_str());
5391                            }
5392                        }
5393                    }
5394                    else
5395                    {
5396                        if (m_using_apple_tables)
5397                        {
5398                            GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5399                                                                                       die_offset, type_name.GetCString());
5400                        }
5401                    }
5402
5403                }
5404            }
5405        }
5406    }
5407    return type_sp;
5408}
5409
5410bool
5411SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5412                                             Type *class_type,
5413                                             DWARFCompileUnit* src_cu,
5414                                             const DWARFDebugInfoEntry *src_class_die,
5415                                             DWARFCompileUnit* dst_cu,
5416                                             const DWARFDebugInfoEntry *dst_class_die,
5417                                             DWARFDIECollection &failures)
5418{
5419    if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5420        return false;
5421    if (src_class_die->Tag() != dst_class_die->Tag())
5422        return false;
5423
5424    // We need to complete the class type so we can get all of the method types
5425    // parsed so we can then unique those types to their equivalent counterparts
5426    // in "dst_cu" and "dst_class_die"
5427    class_type->GetClangFullType();
5428
5429    const DWARFDebugInfoEntry *src_die;
5430    const DWARFDebugInfoEntry *dst_die;
5431    UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5432    UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5433    UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5434    UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5435    for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5436    {
5437        if (src_die->Tag() == DW_TAG_subprogram)
5438        {
5439            // Make sure this is a declaration and not a concrete instance by looking
5440            // for DW_AT_declaration set to 1. Sometimes concrete function instances
5441            // are placed inside the class definitions and shouldn't be included in
5442            // the list of things are are tracking here.
5443            if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5444            {
5445                const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5446                if (src_name)
5447                {
5448                    ConstString src_const_name(src_name);
5449                    if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5450                        src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5451                    else
5452                        src_name_to_die.Append(src_const_name.GetCString(), src_die);
5453                }
5454            }
5455        }
5456    }
5457    for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5458    {
5459        if (dst_die->Tag() == DW_TAG_subprogram)
5460        {
5461            // Make sure this is a declaration and not a concrete instance by looking
5462            // for DW_AT_declaration set to 1. Sometimes concrete function instances
5463            // are placed inside the class definitions and shouldn't be included in
5464            // the list of things are are tracking here.
5465            if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5466            {
5467                const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5468                if (dst_name)
5469                {
5470                    ConstString dst_const_name(dst_name);
5471                    if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5472                        dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5473                    else
5474                        dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5475                }
5476            }
5477        }
5478    }
5479    const uint32_t src_size = src_name_to_die.GetSize ();
5480    const uint32_t dst_size = dst_name_to_die.GetSize ();
5481    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5482
5483    // Is everything kosher so we can go through the members at top speed?
5484    bool fast_path = true;
5485
5486    if (src_size != dst_size)
5487    {
5488        if (src_size != 0 && dst_size != 0)
5489        {
5490            if (log)
5491                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)",
5492                            src_class_die->GetOffset(),
5493                            dst_class_die->GetOffset(),
5494                            src_size,
5495                            dst_size);
5496        }
5497
5498        fast_path = false;
5499    }
5500
5501    uint32_t idx;
5502
5503    if (fast_path)
5504    {
5505        for (idx = 0; idx < src_size; ++idx)
5506        {
5507            src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5508            dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5509
5510            if (src_die->Tag() != dst_die->Tag())
5511            {
5512                if (log)
5513                    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)",
5514                                src_class_die->GetOffset(),
5515                                dst_class_die->GetOffset(),
5516                                src_die->GetOffset(),
5517                                DW_TAG_value_to_name(src_die->Tag()),
5518                                dst_die->GetOffset(),
5519                                DW_TAG_value_to_name(src_die->Tag()));
5520                fast_path = false;
5521            }
5522
5523            const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5524            const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5525
5526            // Make sure the names match
5527            if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5528                continue;
5529
5530            if (log)
5531                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)",
5532                            src_class_die->GetOffset(),
5533                            dst_class_die->GetOffset(),
5534                            src_die->GetOffset(),
5535                            src_name,
5536                            dst_die->GetOffset(),
5537                            dst_name);
5538
5539            fast_path = false;
5540        }
5541    }
5542
5543    // Now do the work of linking the DeclContexts and Types.
5544    if (fast_path)
5545    {
5546        // We can do this quickly.  Just run across the tables index-for-index since
5547        // we know each node has matching names and tags.
5548        for (idx = 0; idx < src_size; ++idx)
5549        {
5550            src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5551            dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5552
5553            clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5554            if (src_decl_ctx)
5555            {
5556                if (log)
5557                    log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5558                                 static_cast<void*>(src_decl_ctx),
5559                                 src_die->GetOffset(), dst_die->GetOffset());
5560                LinkDeclContextToDIE (src_decl_ctx, dst_die);
5561            }
5562            else
5563            {
5564                if (log)
5565                    log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found",
5566                                 src_die->GetOffset(), dst_die->GetOffset());
5567            }
5568
5569            Type *src_child_type = m_die_to_type[src_die];
5570            if (src_child_type)
5571            {
5572                if (log)
5573                    log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5574                                 static_cast<void*>(src_child_type),
5575                                 src_child_type->GetID(),
5576                                 src_die->GetOffset(), dst_die->GetOffset());
5577                m_die_to_type[dst_die] = src_child_type;
5578            }
5579            else
5580            {
5581                if (log)
5582                    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());
5583            }
5584        }
5585    }
5586    else
5587    {
5588        // We must do this slowly.  For each member of the destination, look
5589        // up a member in the source with the same name, check its tag, and
5590        // unique them if everything matches up.  Report failures.
5591
5592        if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5593        {
5594            src_name_to_die.Sort();
5595
5596            for (idx = 0; idx < dst_size; ++idx)
5597            {
5598                const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5599                dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5600                src_die = src_name_to_die.Find(dst_name, NULL);
5601
5602                if (src_die && (src_die->Tag() == dst_die->Tag()))
5603                {
5604                    clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5605                    if (src_decl_ctx)
5606                    {
5607                        if (log)
5608                            log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5609                                         static_cast<void*>(src_decl_ctx),
5610                                         src_die->GetOffset(),
5611                                         dst_die->GetOffset());
5612                        LinkDeclContextToDIE (src_decl_ctx, dst_die);
5613                    }
5614                    else
5615                    {
5616                        if (log)
5617                            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());
5618                    }
5619
5620                    Type *src_child_type = m_die_to_type[src_die];
5621                    if (src_child_type)
5622                    {
5623                        if (log)
5624                            log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5625                                         static_cast<void*>(src_child_type),
5626                                         src_child_type->GetID(),
5627                                         src_die->GetOffset(),
5628                                         dst_die->GetOffset());
5629                        m_die_to_type[dst_die] = src_child_type;
5630                    }
5631                    else
5632                    {
5633                        if (log)
5634                            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());
5635                    }
5636                }
5637                else
5638                {
5639                    if (log)
5640                        log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5641
5642                    failures.Append(dst_die);
5643                }
5644            }
5645        }
5646    }
5647
5648    const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5649    const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5650
5651    UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5652
5653    if (src_size_artificial && dst_size_artificial)
5654    {
5655        dst_name_to_die_artificial.Sort();
5656
5657        for (idx = 0; idx < src_size_artificial; ++idx)
5658        {
5659            const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5660            src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5661            dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5662
5663            if (dst_die)
5664            {
5665                // Both classes have the artificial types, link them
5666                clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5667                if (src_decl_ctx)
5668                {
5669                    if (log)
5670                        log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5671                                     static_cast<void*>(src_decl_ctx),
5672                                     src_die->GetOffset(), dst_die->GetOffset());
5673                    LinkDeclContextToDIE (src_decl_ctx, dst_die);
5674                }
5675                else
5676                {
5677                    if (log)
5678                        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());
5679                }
5680
5681                Type *src_child_type = m_die_to_type[src_die];
5682                if (src_child_type)
5683                {
5684                    if (log)
5685                        log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5686                                     static_cast<void*>(src_child_type),
5687                                     src_child_type->GetID(),
5688                                     src_die->GetOffset(), dst_die->GetOffset());
5689                    m_die_to_type[dst_die] = src_child_type;
5690                }
5691                else
5692                {
5693                    if (log)
5694                        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());
5695                }
5696            }
5697        }
5698    }
5699
5700    if (dst_size_artificial)
5701    {
5702        for (idx = 0; idx < dst_size_artificial; ++idx)
5703        {
5704            const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5705            dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5706            if (log)
5707                log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5708
5709            failures.Append(dst_die);
5710        }
5711    }
5712
5713    return (failures.Size() != 0);
5714}
5715
5716TypeSP
5717SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5718{
5719    TypeSP type_sp;
5720
5721    if (type_is_new_ptr)
5722        *type_is_new_ptr = false;
5723
5724#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5725    static DIEStack g_die_stack;
5726    DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5727#endif
5728
5729    AccessType accessibility = eAccessNone;
5730    if (die != NULL)
5731    {
5732        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5733        if (log)
5734        {
5735            const DWARFDebugInfoEntry *context_die;
5736            clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5737
5738            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5739                                                      die->GetOffset(),
5740                                                      static_cast<void*>(context),
5741                                                      context_die->GetOffset(),
5742                                                      DW_TAG_value_to_name(die->Tag()),
5743                                                      die->GetName(this, dwarf_cu));
5744
5745#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5746            scoped_die_logger.Push (dwarf_cu, die);
5747            g_die_stack.LogDIEs(log, this);
5748#endif
5749        }
5750//
5751//        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5752//        if (log && dwarf_cu)
5753//        {
5754//            StreamString s;
5755//            die->DumpLocation (this, dwarf_cu, s);
5756//            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5757//
5758//        }
5759
5760        Type *type_ptr = m_die_to_type.lookup (die);
5761        TypeList* type_list = GetTypeList();
5762        if (type_ptr == NULL)
5763        {
5764            ClangASTContext &ast = GetClangASTContext();
5765            if (type_is_new_ptr)
5766                *type_is_new_ptr = true;
5767
5768            const dw_tag_t tag = die->Tag();
5769
5770            bool is_forward_declaration = false;
5771            DWARFDebugInfoEntry::Attributes attributes;
5772            const char *type_name_cstr = NULL;
5773            ConstString type_name_const_str;
5774            Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5775            uint64_t byte_size = 0;
5776            Declaration decl;
5777
5778            Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5779            ClangASTType clang_type;
5780            DWARFFormValue form_value;
5781
5782            dw_attr_t attr;
5783
5784            switch (tag)
5785            {
5786            case DW_TAG_base_type:
5787            case DW_TAG_pointer_type:
5788            case DW_TAG_reference_type:
5789            case DW_TAG_rvalue_reference_type:
5790            case DW_TAG_typedef:
5791            case DW_TAG_const_type:
5792            case DW_TAG_restrict_type:
5793            case DW_TAG_volatile_type:
5794            case DW_TAG_unspecified_type:
5795                {
5796                    // Set a bit that lets us know that we are currently parsing this
5797                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
5798
5799                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5800                    uint32_t encoding = 0;
5801                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5802
5803                    if (num_attributes > 0)
5804                    {
5805                        uint32_t i;
5806                        for (i=0; i<num_attributes; ++i)
5807                        {
5808                            attr = attributes.AttributeAtIndex(i);
5809                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5810                            {
5811                                switch (attr)
5812                                {
5813                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5814                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5815                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5816                                case DW_AT_name:
5817
5818                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
5819                                    // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5820                                    // include the "&"...
5821                                    if (tag == DW_TAG_reference_type)
5822                                    {
5823                                        if (strchr (type_name_cstr, '&') == NULL)
5824                                            type_name_cstr = NULL;
5825                                    }
5826                                    if (type_name_cstr)
5827                                        type_name_const_str.SetCString(type_name_cstr);
5828                                    break;
5829                                case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5830                                case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5831                                case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
5832                                default:
5833                                case DW_AT_sibling:
5834                                    break;
5835                                }
5836                            }
5837                        }
5838                    }
5839
5840                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5841
5842                    switch (tag)
5843                    {
5844                    default:
5845                        break;
5846
5847                    case DW_TAG_unspecified_type:
5848                        if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5849                            strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5850                        {
5851                            resolve_state = Type::eResolveStateFull;
5852                            clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5853                            break;
5854                        }
5855                        // Fall through to base type below in case we can handle the type there...
5856
5857                    case DW_TAG_base_type:
5858                        resolve_state = Type::eResolveStateFull;
5859                        clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5860                                                                                   encoding,
5861                                                                                   byte_size * 8);
5862                        break;
5863
5864                    case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5865                    case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5866                    case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5867                    case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5868                    case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5869                    case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5870                    case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5871                    }
5872
5873                    if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5874                    {
5875                        bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5876
5877                        if (translation_unit_is_objc)
5878                        {
5879                            if (type_name_cstr != NULL)
5880                            {
5881                                static ConstString g_objc_type_name_id("id");
5882                                static ConstString g_objc_type_name_Class("Class");
5883                                static ConstString g_objc_type_name_selector("SEL");
5884
5885                                if (type_name_const_str == g_objc_type_name_id)
5886                                {
5887                                    if (log)
5888                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5889                                                                                  die->GetOffset(),
5890                                                                                  DW_TAG_value_to_name(die->Tag()),
5891                                                                                  die->GetName(this, dwarf_cu));
5892                                    clang_type = ast.GetBasicType(eBasicTypeObjCID);
5893                                    encoding_data_type = Type::eEncodingIsUID;
5894                                    encoding_uid = LLDB_INVALID_UID;
5895                                    resolve_state = Type::eResolveStateFull;
5896
5897                                }
5898                                else if (type_name_const_str == g_objc_type_name_Class)
5899                                {
5900                                    if (log)
5901                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5902                                                                                  die->GetOffset(),
5903                                                                                  DW_TAG_value_to_name(die->Tag()),
5904                                                                                  die->GetName(this, dwarf_cu));
5905                                    clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5906                                    encoding_data_type = Type::eEncodingIsUID;
5907                                    encoding_uid = LLDB_INVALID_UID;
5908                                    resolve_state = Type::eResolveStateFull;
5909                                }
5910                                else if (type_name_const_str == g_objc_type_name_selector)
5911                                {
5912                                    if (log)
5913                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5914                                                                                  die->GetOffset(),
5915                                                                                  DW_TAG_value_to_name(die->Tag()),
5916                                                                                  die->GetName(this, dwarf_cu));
5917                                    clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5918                                    encoding_data_type = Type::eEncodingIsUID;
5919                                    encoding_uid = LLDB_INVALID_UID;
5920                                    resolve_state = Type::eResolveStateFull;
5921                                }
5922                            }
5923                            else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5924                            {
5925                                // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5926
5927                                DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5928
5929                                if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5930                                {
5931                                    if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5932                                    {
5933                                        if (!strcmp(struct_name, "objc_object"))
5934                                        {
5935                                            if (log)
5936                                                GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5937                                                                                          die->GetOffset(),
5938                                                                                          DW_TAG_value_to_name(die->Tag()),
5939                                                                                          die->GetName(this, dwarf_cu));
5940                                            clang_type = ast.GetBasicType(eBasicTypeObjCID);
5941                                            encoding_data_type = Type::eEncodingIsUID;
5942                                            encoding_uid = LLDB_INVALID_UID;
5943                                            resolve_state = Type::eResolveStateFull;
5944                                        }
5945                                    }
5946                                }
5947                            }
5948                        }
5949                    }
5950
5951                    type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5952                                             this,
5953                                             type_name_const_str,
5954                                             byte_size,
5955                                             NULL,
5956                                             encoding_uid,
5957                                             encoding_data_type,
5958                                             &decl,
5959                                             clang_type,
5960                                             resolve_state));
5961
5962                    m_die_to_type[die] = type_sp.get();
5963
5964//                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5965//                  if (encoding_type != NULL)
5966//                  {
5967//                      if (encoding_type != DIE_IS_BEING_PARSED)
5968//                          type_sp->SetEncodingType(encoding_type);
5969//                      else
5970//                          m_indirect_fixups.push_back(type_sp.get());
5971//                  }
5972                }
5973                break;
5974
5975            case DW_TAG_structure_type:
5976            case DW_TAG_union_type:
5977            case DW_TAG_class_type:
5978                {
5979                    // Set a bit that lets us know that we are currently parsing this
5980                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
5981                    bool byte_size_valid = false;
5982
5983                    LanguageType class_language = eLanguageTypeUnknown;
5984                    bool is_complete_objc_class = false;
5985                    //bool struct_is_class = false;
5986                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5987                    if (num_attributes > 0)
5988                    {
5989                        uint32_t i;
5990                        for (i=0; i<num_attributes; ++i)
5991                        {
5992                            attr = attributes.AttributeAtIndex(i);
5993                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5994                            {
5995                                switch (attr)
5996                                {
5997                                case DW_AT_decl_file:
5998                                    if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
5999                                    {
6000                                        // llvm-gcc outputs invalid DW_AT_decl_file attributes that always
6001                                        // point to the compile unit file, so we clear this invalid value
6002                                        // so that we can still unique types efficiently.
6003                                        decl.SetFile(FileSpec ("<invalid>", false));
6004                                    }
6005                                    else
6006                                        decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
6007                                    break;
6008
6009                                case DW_AT_decl_line:
6010                                    decl.SetLine(form_value.Unsigned());
6011                                    break;
6012
6013                                case DW_AT_decl_column:
6014                                    decl.SetColumn(form_value.Unsigned());
6015                                    break;
6016
6017                                case DW_AT_name:
6018                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6019                                    type_name_const_str.SetCString(type_name_cstr);
6020                                    break;
6021
6022                                case DW_AT_byte_size:
6023                                    byte_size = form_value.Unsigned();
6024                                    byte_size_valid = true;
6025                                    break;
6026
6027                                case DW_AT_accessibility:
6028                                    accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
6029                                    break;
6030
6031                                case DW_AT_declaration:
6032                                    is_forward_declaration = form_value.Boolean();
6033                                    break;
6034
6035                                case DW_AT_APPLE_runtime_class:
6036                                    class_language = (LanguageType)form_value.Signed();
6037                                    break;
6038
6039                                case DW_AT_APPLE_objc_complete_type:
6040                                    is_complete_objc_class = form_value.Signed();
6041                                    break;
6042
6043                                case DW_AT_allocated:
6044                                case DW_AT_associated:
6045                                case DW_AT_data_location:
6046                                case DW_AT_description:
6047                                case DW_AT_start_scope:
6048                                case DW_AT_visibility:
6049                                default:
6050                                case DW_AT_sibling:
6051                                    break;
6052                                }
6053                            }
6054                        }
6055                    }
6056
6057                    // UniqueDWARFASTType is large, so don't create a local variables on the
6058                    // stack, put it on the heap. This function is often called recursively
6059                    // and clang isn't good and sharing the stack space for variables in different blocks.
6060                    std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType());
6061
6062                    // Only try and unique the type if it has a name.
6063                    if (type_name_const_str &&
6064                        GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
6065                                                         this,
6066                                                         dwarf_cu,
6067                                                         die,
6068                                                         decl,
6069                                                         byte_size_valid ? byte_size : -1,
6070                                                         *unique_ast_entry_ap))
6071                    {
6072                        // We have already parsed this type or from another
6073                        // compile unit. GCC loves to use the "one definition
6074                        // rule" which can result in multiple definitions
6075                        // of the same class over and over in each compile
6076                        // unit.
6077                        type_sp = unique_ast_entry_ap->m_type_sp;
6078                        if (type_sp)
6079                        {
6080                            m_die_to_type[die] = type_sp.get();
6081                            return type_sp;
6082                        }
6083                    }
6084
6085                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6086
6087                    int tag_decl_kind = -1;
6088                    AccessType default_accessibility = eAccessNone;
6089                    if (tag == DW_TAG_structure_type)
6090                    {
6091                        tag_decl_kind = clang::TTK_Struct;
6092                        default_accessibility = eAccessPublic;
6093                    }
6094                    else if (tag == DW_TAG_union_type)
6095                    {
6096                        tag_decl_kind = clang::TTK_Union;
6097                        default_accessibility = eAccessPublic;
6098                    }
6099                    else if (tag == DW_TAG_class_type)
6100                    {
6101                        tag_decl_kind = clang::TTK_Class;
6102                        default_accessibility = eAccessPrivate;
6103                    }
6104
6105                    if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6106                        die->HasChildren() == false &&
6107                        sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6108                    {
6109                        // Work around an issue with clang at the moment where
6110                        // forward declarations for objective C classes are emitted
6111                        // as:
6112                        //  DW_TAG_structure_type [2]
6113                        //  DW_AT_name( "ForwardObjcClass" )
6114                        //  DW_AT_byte_size( 0x00 )
6115                        //  DW_AT_decl_file( "..." )
6116                        //  DW_AT_decl_line( 1 )
6117                        //
6118                        // Note that there is no DW_AT_declaration and there are
6119                        // no children, and the byte size is zero.
6120                        is_forward_declaration = true;
6121                    }
6122
6123                    if (class_language == eLanguageTypeObjC ||
6124                        class_language == eLanguageTypeObjC_plus_plus)
6125                    {
6126                        if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6127                        {
6128                            // We have a valid eSymbolTypeObjCClass class symbol whose
6129                            // name matches the current objective C class that we
6130                            // are trying to find and this DIE isn't the complete
6131                            // definition (we checked is_complete_objc_class above and
6132                            // know it is false), so the real definition is in here somewhere
6133                            type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6134
6135                            if (!type_sp && GetDebugMapSymfile ())
6136                            {
6137                                // We weren't able to find a full declaration in
6138                                // this DWARF, see if we have a declaration anywhere
6139                                // else...
6140                                type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6141                            }
6142
6143                            if (type_sp)
6144                            {
6145                                if (log)
6146                                {
6147                                    GetObjectFile()->GetModule()->LogMessage (log,
6148                                                                              "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6149                                                                              static_cast<void*>(this),
6150                                                                              die->GetOffset(),
6151                                                                              DW_TAG_value_to_name(tag),
6152                                                                              type_name_cstr,
6153                                                                              type_sp->GetID());
6154                                }
6155
6156                                // We found a real definition for this type elsewhere
6157                                // so lets use it and cache the fact that we found
6158                                // a complete type for this die
6159                                m_die_to_type[die] = type_sp.get();
6160                                return type_sp;
6161                            }
6162                        }
6163                    }
6164
6165
6166                    if (is_forward_declaration)
6167                    {
6168                        // We have a forward declaration to a type and we need
6169                        // to try and find a full declaration. We look in the
6170                        // current type index just in case we have a forward
6171                        // declaration followed by an actual declarations in the
6172                        // DWARF. If this fails, we need to look elsewhere...
6173                        if (log)
6174                        {
6175                            GetObjectFile()->GetModule()->LogMessage (log,
6176                                                                      "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6177                                                                      static_cast<void*>(this),
6178                                                                      die->GetOffset(),
6179                                                                      DW_TAG_value_to_name(tag),
6180                                                                      type_name_cstr);
6181                        }
6182
6183                        DWARFDeclContext die_decl_ctx;
6184                        die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6185
6186                        //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6187                        type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6188
6189                        if (!type_sp && GetDebugMapSymfile ())
6190                        {
6191                            // We weren't able to find a full declaration in
6192                            // this DWARF, see if we have a declaration anywhere
6193                            // else...
6194                            type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6195                        }
6196
6197                        if (type_sp)
6198                        {
6199                            if (log)
6200                            {
6201                                GetObjectFile()->GetModule()->LogMessage (log,
6202                                                                          "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6203                                                                          static_cast<void*>(this),
6204                                                                          die->GetOffset(),
6205                                                                          DW_TAG_value_to_name(tag),
6206                                                                          type_name_cstr,
6207                                                                          type_sp->GetID());
6208                            }
6209
6210                            // We found a real definition for this type elsewhere
6211                            // so lets use it and cache the fact that we found
6212                            // a complete type for this die
6213                            m_die_to_type[die] = type_sp.get();
6214                            return type_sp;
6215                        }
6216                    }
6217                    assert (tag_decl_kind != -1);
6218                    bool clang_type_was_created = false;
6219                    clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6220                    if (!clang_type)
6221                    {
6222                        const DWARFDebugInfoEntry *decl_ctx_die;
6223
6224                        clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6225                        if (accessibility == eAccessNone && decl_ctx)
6226                        {
6227                            // Check the decl context that contains this class/struct/union.
6228                            // If it is a class we must give it an accessibility.
6229                            const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6230                            if (DeclKindIsCXXClass (containing_decl_kind))
6231                                accessibility = default_accessibility;
6232                        }
6233
6234                        ClangASTMetadata metadata;
6235                        metadata.SetUserID(MakeUserID(die->GetOffset()));
6236                        metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6237
6238                        if (type_name_cstr && strchr (type_name_cstr, '<'))
6239                        {
6240                            ClangASTContext::TemplateParameterInfos template_param_infos;
6241                            if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6242                            {
6243                                clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6244                                                                                                        accessibility,
6245                                                                                                        type_name_cstr,
6246                                                                                                        tag_decl_kind,
6247                                                                                                        template_param_infos);
6248
6249                                clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6250                                                                                                                                               class_template_decl,
6251                                                                                                                                               tag_decl_kind,
6252                                                                                                                                               template_param_infos);
6253                                clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6254                                clang_type_was_created = true;
6255
6256                                GetClangASTContext().SetMetadata (class_template_decl, metadata);
6257                                GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6258                            }
6259                        }
6260
6261                        if (!clang_type_was_created)
6262                        {
6263                            clang_type_was_created = true;
6264                            clang_type = ast.CreateRecordType (decl_ctx,
6265                                                               accessibility,
6266                                                               type_name_cstr,
6267                                                               tag_decl_kind,
6268                                                               class_language,
6269                                                               &metadata);
6270                        }
6271                    }
6272
6273                    // Store a forward declaration to this class type in case any
6274                    // parameters in any class methods need it for the clang
6275                    // types for function prototypes.
6276                    LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6277                    type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6278                                             this,
6279                                             type_name_const_str,
6280                                             byte_size,
6281                                             NULL,
6282                                             LLDB_INVALID_UID,
6283                                             Type::eEncodingIsUID,
6284                                             &decl,
6285                                             clang_type,
6286                                             Type::eResolveStateForward));
6287
6288                    type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6289
6290
6291                    // Add our type to the unique type map so we don't
6292                    // end up creating many copies of the same type over
6293                    // and over in the ASTContext for our module
6294                    unique_ast_entry_ap->m_type_sp = type_sp;
6295                    unique_ast_entry_ap->m_symfile = this;
6296                    unique_ast_entry_ap->m_cu = dwarf_cu;
6297                    unique_ast_entry_ap->m_die = die;
6298                    unique_ast_entry_ap->m_declaration = decl;
6299                    unique_ast_entry_ap->m_byte_size = byte_size;
6300                    GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6301                                                       *unique_ast_entry_ap);
6302
6303                    if (is_forward_declaration && die->HasChildren())
6304                    {
6305                        // Check to see if the DIE actually has a definition, some version of GCC will
6306                        // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6307                        // members, or inheritance, so we can't trust it
6308                        const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6309                        while (child_die)
6310                        {
6311                            switch (child_die->Tag())
6312                            {
6313                                case DW_TAG_inheritance:
6314                                case DW_TAG_subprogram:
6315                                case DW_TAG_member:
6316                                case DW_TAG_APPLE_property:
6317                                case DW_TAG_class_type:
6318                                case DW_TAG_structure_type:
6319                                case DW_TAG_enumeration_type:
6320                                case DW_TAG_typedef:
6321                                case DW_TAG_union_type:
6322                                    child_die = NULL;
6323                                    is_forward_declaration = false;
6324                                    break;
6325                                default:
6326                                    child_die = child_die->GetSibling();
6327                                    break;
6328                            }
6329                        }
6330                    }
6331
6332                    if (!is_forward_declaration)
6333                    {
6334                        // Always start the definition for a class type so that
6335                        // if the class has child classes or types that require
6336                        // the class to be created for use as their decl contexts
6337                        // the class will be ready to accept these child definitions.
6338                        if (die->HasChildren() == false)
6339                        {
6340                            // No children for this struct/union/class, lets finish it
6341                            clang_type.StartTagDeclarationDefinition ();
6342                            clang_type.CompleteTagDeclarationDefinition ();
6343
6344                            if (tag == DW_TAG_structure_type) // this only applies in C
6345                            {
6346                                clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6347
6348                                if (record_decl)
6349                                    m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo()));
6350                            }
6351                        }
6352                        else if (clang_type_was_created)
6353                        {
6354                            // Start the definition if the class is not objective C since
6355                            // the underlying decls respond to isCompleteDefinition(). Objective
6356                            // C decls don't respond to isCompleteDefinition() so we can't
6357                            // start the declaration definition right away. For C++ class/union/structs
6358                            // we want to start the definition in case the class is needed as the
6359                            // declaration context for a contained class or type without the need
6360                            // to complete that type..
6361
6362                            if (class_language != eLanguageTypeObjC &&
6363                                class_language != eLanguageTypeObjC_plus_plus)
6364                                clang_type.StartTagDeclarationDefinition ();
6365
6366                            // Leave this as a forward declaration until we need
6367                            // to know the details of the type. lldb_private::Type
6368                            // will automatically call the SymbolFile virtual function
6369                            // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6370                            // When the definition needs to be defined.
6371                            m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6372                            m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6373                            clang_type.SetHasExternalStorage (true);
6374                        }
6375                    }
6376
6377                }
6378                break;
6379
6380            case DW_TAG_enumeration_type:
6381                {
6382                    // Set a bit that lets us know that we are currently parsing this
6383                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6384
6385                    lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6386
6387                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6388                    if (num_attributes > 0)
6389                    {
6390                        uint32_t i;
6391
6392                        for (i=0; i<num_attributes; ++i)
6393                        {
6394                            attr = attributes.AttributeAtIndex(i);
6395                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6396                            {
6397                                switch (attr)
6398                                {
6399                                case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6400                                case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6401                                case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6402                                case DW_AT_name:
6403                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6404                                    type_name_const_str.SetCString(type_name_cstr);
6405                                    break;
6406                                case DW_AT_type:            encoding_uid = form_value.Reference(dwarf_cu); break;
6407                                case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6408                                case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6409                                case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6410                                case DW_AT_allocated:
6411                                case DW_AT_associated:
6412                                case DW_AT_bit_stride:
6413                                case DW_AT_byte_stride:
6414                                case DW_AT_data_location:
6415                                case DW_AT_description:
6416                                case DW_AT_start_scope:
6417                                case DW_AT_visibility:
6418                                case DW_AT_specification:
6419                                case DW_AT_abstract_origin:
6420                                case DW_AT_sibling:
6421                                    break;
6422                                }
6423                            }
6424                        }
6425
6426                        DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6427
6428                        ClangASTType enumerator_clang_type;
6429                        clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6430                        if (!clang_type)
6431                        {
6432                            if (encoding_uid != DW_INVALID_OFFSET)
6433                            {
6434                                Type *enumerator_type = ResolveTypeUID(encoding_uid);
6435                                if (enumerator_type)
6436                                    enumerator_clang_type = enumerator_type->GetClangFullType();
6437                            }
6438
6439                            if (!enumerator_clang_type)
6440                                enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6441                                                                                                      DW_ATE_signed,
6442                                                                                                      byte_size * 8);
6443
6444                            clang_type = ast.CreateEnumerationType (type_name_cstr,
6445                                                                    GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6446                                                                    decl,
6447                                                                    enumerator_clang_type);
6448                        }
6449                        else
6450                        {
6451                            enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6452                        }
6453
6454                        LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6455
6456                        type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6457                                                 this,
6458                                                 type_name_const_str,
6459                                                 byte_size,
6460                                                 NULL,
6461                                                 encoding_uid,
6462                                                 Type::eEncodingIsUID,
6463                                                 &decl,
6464                                                 clang_type,
6465                                                 Type::eResolveStateForward));
6466
6467                        clang_type.StartTagDeclarationDefinition ();
6468                        if (die->HasChildren())
6469                        {
6470                            SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6471                            bool is_signed = false;
6472                            enumerator_clang_type.IsIntegerType(is_signed);
6473                            ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6474                        }
6475                        clang_type.CompleteTagDeclarationDefinition ();
6476                    }
6477                }
6478                break;
6479
6480            case DW_TAG_inlined_subroutine:
6481            case DW_TAG_subprogram:
6482            case DW_TAG_subroutine_type:
6483                {
6484                    // Set a bit that lets us know that we are currently parsing this
6485                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6486
6487                    //const char *mangled = NULL;
6488                    dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6489                    bool is_variadic = false;
6490                    bool is_inline = false;
6491                    bool is_static = false;
6492                    bool is_virtual = false;
6493                    bool is_explicit = false;
6494                    bool is_artificial = false;
6495                    dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6496                    dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6497                    dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6498
6499                    unsigned type_quals = 0;
6500                    clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6501
6502
6503                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6504                    if (num_attributes > 0)
6505                    {
6506                        uint32_t i;
6507                        for (i=0; i<num_attributes; ++i)
6508                        {
6509                            attr = attributes.AttributeAtIndex(i);
6510                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6511                            {
6512                                switch (attr)
6513                                {
6514                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6515                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6516                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6517                                case DW_AT_name:
6518                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6519                                    type_name_const_str.SetCString(type_name_cstr);
6520                                    break;
6521
6522                                case DW_AT_linkage_name:
6523                                case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6524                                case DW_AT_type:                type_die_offset = form_value.Reference(dwarf_cu); break;
6525                                case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6526                                case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6527                                case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6528                                case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6529                                case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6530                                case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6531
6532
6533                                case DW_AT_external:
6534                                    if (form_value.Unsigned())
6535                                    {
6536                                        if (storage == clang::SC_None)
6537                                            storage = clang::SC_Extern;
6538                                        else
6539                                            storage = clang::SC_PrivateExtern;
6540                                    }
6541                                    break;
6542
6543                                case DW_AT_specification:
6544                                    specification_die_offset = form_value.Reference(dwarf_cu);
6545                                    break;
6546
6547                                case DW_AT_abstract_origin:
6548                                    abstract_origin_die_offset = form_value.Reference(dwarf_cu);
6549                                    break;
6550
6551                                case DW_AT_object_pointer:
6552                                    object_pointer_die_offset = form_value.Reference(dwarf_cu);
6553                                    break;
6554
6555                                case DW_AT_allocated:
6556                                case DW_AT_associated:
6557                                case DW_AT_address_class:
6558                                case DW_AT_calling_convention:
6559                                case DW_AT_data_location:
6560                                case DW_AT_elemental:
6561                                case DW_AT_entry_pc:
6562                                case DW_AT_frame_base:
6563                                case DW_AT_high_pc:
6564                                case DW_AT_low_pc:
6565                                case DW_AT_prototyped:
6566                                case DW_AT_pure:
6567                                case DW_AT_ranges:
6568                                case DW_AT_recursive:
6569                                case DW_AT_return_addr:
6570                                case DW_AT_segment:
6571                                case DW_AT_start_scope:
6572                                case DW_AT_static_link:
6573                                case DW_AT_trampoline:
6574                                case DW_AT_visibility:
6575                                case DW_AT_vtable_elem_location:
6576                                case DW_AT_description:
6577                                case DW_AT_sibling:
6578                                    break;
6579                                }
6580                            }
6581                        }
6582                    }
6583
6584                    std::string object_pointer_name;
6585                    if (object_pointer_die_offset != DW_INVALID_OFFSET)
6586                    {
6587                        // Get the name from the object pointer die
6588                        StreamString s;
6589                        if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6590                        {
6591                            object_pointer_name.assign(s.GetData());
6592                        }
6593                    }
6594
6595                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6596
6597                    ClangASTType return_clang_type;
6598                    Type *func_type = NULL;
6599
6600                    if (type_die_offset != DW_INVALID_OFFSET)
6601                        func_type = ResolveTypeUID(type_die_offset);
6602
6603                    if (func_type)
6604                        return_clang_type = func_type->GetClangForwardType();
6605                    else
6606                        return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6607
6608
6609                    std::vector<ClangASTType> function_param_types;
6610                    std::vector<clang::ParmVarDecl*> function_param_decls;
6611
6612                    // Parse the function children for the parameters
6613
6614                    const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6615                    clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6616                    const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6617
6618                    const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6619                    // Start off static. This will be set to false in ParseChildParameters(...)
6620                    // if we find a "this" parameters as the first parameter
6621                    if (is_cxx_method)
6622                        is_static = true;
6623
6624                    if (die->HasChildren())
6625                    {
6626                        bool skip_artificial = true;
6627                        ParseChildParameters (sc,
6628                                              containing_decl_ctx,
6629                                              dwarf_cu,
6630                                              die,
6631                                              skip_artificial,
6632                                              is_static,
6633                                              is_variadic,
6634                                              type_list,
6635                                              function_param_types,
6636                                              function_param_decls,
6637                                              type_quals);
6638                    }
6639
6640                    // clang_type will get the function prototype clang type after this call
6641                    clang_type = ast.CreateFunctionType (return_clang_type,
6642                                                         function_param_types.data(),
6643                                                         function_param_types.size(),
6644                                                         is_variadic,
6645                                                         type_quals);
6646
6647                    bool ignore_containing_context = false;
6648
6649                    if (type_name_cstr)
6650                    {
6651                        bool type_handled = false;
6652                        if (tag == DW_TAG_subprogram)
6653                        {
6654                            ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6655                            if (objc_method.IsValid(true))
6656                            {
6657                                ClangASTType class_opaque_type;
6658                                ConstString class_name(objc_method.GetClassName());
6659                                if (class_name)
6660                                {
6661                                    TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6662
6663                                    if (complete_objc_class_type_sp)
6664                                    {
6665                                        ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6666                                        if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6667                                            class_opaque_type = type_clang_forward_type;
6668                                    }
6669                                }
6670
6671                                if (class_opaque_type)
6672                                {
6673                                    // If accessibility isn't set to anything valid, assume public for
6674                                    // now...
6675                                    if (accessibility == eAccessNone)
6676                                        accessibility = eAccessPublic;
6677
6678                                    clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6679                                                                                                                           clang_type,
6680                                                                                                                           accessibility,
6681                                                                                                                           is_artificial);
6682                                    type_handled = objc_method_decl != NULL;
6683                                    if (type_handled)
6684                                    {
6685                                        LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6686                                        GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6687                                    }
6688                                    else
6689                                    {
6690                                        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",
6691                                                                                   die->GetOffset(),
6692                                                                                   tag,
6693                                                                                   DW_TAG_value_to_name(tag));
6694                                    }
6695                                }
6696                            }
6697                            else if (is_cxx_method)
6698                            {
6699                                // Look at the parent of this DIE and see if is is
6700                                // a class or struct and see if this is actually a
6701                                // C++ method
6702                                Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6703                                if (class_type)
6704                                {
6705                                    if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6706                                    {
6707                                        // We uniqued the parent class of this function to another class
6708                                        // so we now need to associate all dies under "decl_ctx_die" to
6709                                        // DIEs in the DIE for "class_type"...
6710                                        SymbolFileDWARF *class_symfile = NULL;
6711                                        DWARFCompileUnitSP class_type_cu_sp;
6712                                        const DWARFDebugInfoEntry *class_type_die = NULL;
6713
6714                                        SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6715                                        if (debug_map_symfile)
6716                                        {
6717                                            class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6718                                            class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6719                                        }
6720                                        else
6721                                        {
6722                                            class_symfile = this;
6723                                            class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6724                                        }
6725                                        if (class_type_die)
6726                                        {
6727                                            DWARFDIECollection failures;
6728
6729                                            CopyUniqueClassMethodTypes (class_symfile,
6730                                                                        class_type,
6731                                                                        class_type_cu_sp.get(),
6732                                                                        class_type_die,
6733                                                                        dwarf_cu,
6734                                                                        decl_ctx_die,
6735                                                                        failures);
6736
6737                                            // FIXME do something with these failures that's smarter than
6738                                            // just dropping them on the ground.  Unfortunately classes don't
6739                                            // like having stuff added to them after their definitions are
6740                                            // complete...
6741
6742                                            type_ptr = m_die_to_type[die];
6743                                            if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6744                                            {
6745                                                type_sp = type_ptr->shared_from_this();
6746                                                break;
6747                                            }
6748                                        }
6749                                    }
6750
6751                                    if (specification_die_offset != DW_INVALID_OFFSET)
6752                                    {
6753                                        // We have a specification which we are going to base our function
6754                                        // prototype off of, so we need this type to be completed so that the
6755                                        // m_die_to_decl_ctx for the method in the specification has a valid
6756                                        // clang decl context.
6757                                        class_type->GetClangForwardType();
6758                                        // If we have a specification, then the function type should have been
6759                                        // made with the specification and not with this die.
6760                                        DWARFCompileUnitSP spec_cu_sp;
6761                                        const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6762                                        clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6763                                        if (spec_clang_decl_ctx)
6764                                        {
6765                                            LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6766                                        }
6767                                        else
6768                                        {
6769                                            GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6770                                                                                         MakeUserID(die->GetOffset()),
6771                                                                                         specification_die_offset);
6772                                        }
6773                                        type_handled = true;
6774                                    }
6775                                    else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6776                                    {
6777                                        // We have a specification which we are going to base our function
6778                                        // prototype off of, so we need this type to be completed so that the
6779                                        // m_die_to_decl_ctx for the method in the abstract origin has a valid
6780                                        // clang decl context.
6781                                        class_type->GetClangForwardType();
6782
6783                                        DWARFCompileUnitSP abs_cu_sp;
6784                                        const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6785                                        clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6786                                        if (abs_clang_decl_ctx)
6787                                        {
6788                                            LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6789                                        }
6790                                        else
6791                                        {
6792                                            GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6793                                                                                         MakeUserID(die->GetOffset()),
6794                                                                                         abstract_origin_die_offset);
6795                                        }
6796                                        type_handled = true;
6797                                    }
6798                                    else
6799                                    {
6800                                        ClangASTType class_opaque_type = class_type->GetClangForwardType();
6801                                        if (class_opaque_type.IsCXXClassType ())
6802                                        {
6803                                            if (class_opaque_type.IsBeingDefined ())
6804                                            {
6805                                                // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6806                                                // in the DWARF for C++ methods... Default to public for now...
6807                                                if (accessibility == eAccessNone)
6808                                                    accessibility = eAccessPublic;
6809
6810                                                if (!is_static && !die->HasChildren())
6811                                                {
6812                                                    // We have a C++ member function with no children (this pointer!)
6813                                                    // and clang will get mad if we try and make a function that isn't
6814                                                    // well formed in the DWARF, so we will just skip it...
6815                                                    type_handled = true;
6816                                                }
6817                                                else
6818                                                {
6819                                                    clang::CXXMethodDecl *cxx_method_decl;
6820                                                    // REMOVE THE CRASH DESCRIPTION BELOW
6821                                                    Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6822                                                                                         type_name_cstr,
6823                                                                                         class_type->GetName().GetCString(),
6824                                                                                         MakeUserID(die->GetOffset()),
6825                                                                                         m_obj_file->GetFileSpec().GetPath().c_str());
6826
6827                                                    const bool is_attr_used = false;
6828
6829                                                    cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6830                                                                                                                  clang_type,
6831                                                                                                                  accessibility,
6832                                                                                                                  is_virtual,
6833                                                                                                                  is_static,
6834                                                                                                                  is_inline,
6835                                                                                                                  is_explicit,
6836                                                                                                                  is_attr_used,
6837                                                                                                                  is_artificial);
6838
6839                                                    type_handled = cxx_method_decl != NULL;
6840
6841                                                    if (type_handled)
6842                                                    {
6843                                                        LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6844
6845                                                        Host::SetCrashDescription (NULL);
6846
6847
6848                                                        ClangASTMetadata metadata;
6849                                                        metadata.SetUserID(MakeUserID(die->GetOffset()));
6850
6851                                                        if (!object_pointer_name.empty())
6852                                                        {
6853                                                            metadata.SetObjectPtrName(object_pointer_name.c_str());
6854                                                            if (log)
6855                                                                log->Printf ("Setting object pointer name: %s on method object %p.\n",
6856                                                                             object_pointer_name.c_str(),
6857                                                                             static_cast<void*>(cxx_method_decl));
6858                                                        }
6859                                                        GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6860                                                    }
6861                                                    else
6862                                                    {
6863                                                        ignore_containing_context = true;
6864                                                    }
6865                                                }
6866                                            }
6867                                            else
6868                                            {
6869                                                // We were asked to parse the type for a method in a class, yet the
6870                                                // class hasn't been asked to complete itself through the
6871                                                // clang::ExternalASTSource protocol, so we need to just have the
6872                                                // class complete itself and do things the right way, then our
6873                                                // DIE should then have an entry in the m_die_to_type map. First
6874                                                // we need to modify the m_die_to_type so it doesn't think we are
6875                                                // trying to parse this DIE anymore...
6876                                                m_die_to_type[die] = NULL;
6877
6878                                                // Now we get the full type to force our class type to complete itself
6879                                                // using the clang::ExternalASTSource protocol which will parse all
6880                                                // base classes and all methods (including the method for this DIE).
6881                                                class_type->GetClangFullType();
6882
6883                                                // The type for this DIE should have been filled in the function call above
6884                                                type_ptr = m_die_to_type[die];
6885                                                if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6886                                                {
6887                                                    type_sp = type_ptr->shared_from_this();
6888                                                    break;
6889                                                }
6890
6891                                                // FIXME This is fixing some even uglier behavior but we really need to
6892                                                // uniq the methods of each class as well as the class itself.
6893                                                // <rdar://problem/11240464>
6894                                                type_handled = true;
6895                                            }
6896                                        }
6897                                    }
6898                                }
6899                            }
6900                        }
6901
6902                        if (!type_handled)
6903                        {
6904                            // We just have a function that isn't part of a class
6905                            clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6906                                                                                                type_name_cstr,
6907                                                                                                clang_type,
6908                                                                                                storage,
6909                                                                                                is_inline);
6910
6911//                            if (template_param_infos.GetSize() > 0)
6912//                            {
6913//                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6914//                                                                                                                  function_decl,
6915//                                                                                                                  type_name_cstr,
6916//                                                                                                                  template_param_infos);
6917//
6918//                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6919//                                                                              func_template_decl,
6920//                                                                              template_param_infos);
6921//                            }
6922                            // Add the decl to our DIE to decl context map
6923                            assert (function_decl);
6924                            LinkDeclContextToDIE(function_decl, die);
6925                            if (!function_param_decls.empty())
6926                                ast.SetFunctionParameters (function_decl,
6927                                                           &function_param_decls.front(),
6928                                                           function_param_decls.size());
6929
6930                            ClangASTMetadata metadata;
6931                            metadata.SetUserID(MakeUserID(die->GetOffset()));
6932
6933                            if (!object_pointer_name.empty())
6934                            {
6935                                metadata.SetObjectPtrName(object_pointer_name.c_str());
6936                                if (log)
6937                                    log->Printf ("Setting object pointer name: %s on function object %p.",
6938                                                 object_pointer_name.c_str(),
6939                                                 static_cast<void*>(function_decl));
6940                            }
6941                            GetClangASTContext().SetMetadata (function_decl, metadata);
6942                        }
6943                    }
6944                    type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6945                                             this,
6946                                             type_name_const_str,
6947                                             0,
6948                                             NULL,
6949                                             LLDB_INVALID_UID,
6950                                             Type::eEncodingIsUID,
6951                                             &decl,
6952                                             clang_type,
6953                                             Type::eResolveStateFull));
6954                    assert(type_sp.get());
6955                }
6956                break;
6957
6958            case DW_TAG_array_type:
6959                {
6960                    // Set a bit that lets us know that we are currently parsing this
6961                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6962
6963                    lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6964                    int64_t first_index = 0;
6965                    uint32_t byte_stride = 0;
6966                    uint32_t bit_stride = 0;
6967                    bool is_vector = false;
6968                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6969
6970                    if (num_attributes > 0)
6971                    {
6972                        uint32_t i;
6973                        for (i=0; i<num_attributes; ++i)
6974                        {
6975                            attr = attributes.AttributeAtIndex(i);
6976                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6977                            {
6978                                switch (attr)
6979                                {
6980                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6981                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6982                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6983                                case DW_AT_name:
6984                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6985                                    type_name_const_str.SetCString(type_name_cstr);
6986                                    break;
6987
6988                                case DW_AT_type:            type_die_offset = form_value.Reference(dwarf_cu); break;
6989                                case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
6990                                case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
6991                                case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
6992                                case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
6993                                case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6994                                case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
6995                                case DW_AT_allocated:
6996                                case DW_AT_associated:
6997                                case DW_AT_data_location:
6998                                case DW_AT_description:
6999                                case DW_AT_ordering:
7000                                case DW_AT_start_scope:
7001                                case DW_AT_visibility:
7002                                case DW_AT_specification:
7003                                case DW_AT_abstract_origin:
7004                                case DW_AT_sibling:
7005                                    break;
7006                                }
7007                            }
7008                        }
7009
7010                        DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
7011
7012                        Type *element_type = ResolveTypeUID(type_die_offset);
7013
7014                        if (element_type)
7015                        {
7016                            std::vector<uint64_t> element_orders;
7017                            ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
7018                            if (byte_stride == 0 && bit_stride == 0)
7019                                byte_stride = element_type->GetByteSize();
7020                            ClangASTType array_element_type = element_type->GetClangForwardType();
7021                            uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
7022                            uint64_t num_elements = 0;
7023                            std::vector<uint64_t>::const_reverse_iterator pos;
7024                            std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
7025                            for (pos = element_orders.rbegin(); pos != end; ++pos)
7026                            {
7027                                num_elements = *pos;
7028                                clang_type = ast.CreateArrayType (array_element_type,
7029                                                                  num_elements,
7030                                                                  is_vector);
7031                                array_element_type = clang_type;
7032                                array_element_bit_stride = num_elements ? array_element_bit_stride * num_elements : array_element_bit_stride;
7033                            }
7034                            ConstString empty_name;
7035                            type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7036                                                     this,
7037                                                     empty_name,
7038                                                     array_element_bit_stride / 8,
7039                                                     NULL,
7040                                                     type_die_offset,
7041                                                     Type::eEncodingIsUID,
7042                                                     &decl,
7043                                                     clang_type,
7044                                                     Type::eResolveStateFull));
7045                            type_sp->SetEncodingType (element_type);
7046                        }
7047                    }
7048                }
7049                break;
7050
7051            case DW_TAG_ptr_to_member_type:
7052                {
7053                    dw_offset_t type_die_offset = DW_INVALID_OFFSET;
7054                    dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
7055
7056                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7057
7058                    if (num_attributes > 0) {
7059                        uint32_t i;
7060                        for (i=0; i<num_attributes; ++i)
7061                        {
7062                            attr = attributes.AttributeAtIndex(i);
7063                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7064                            {
7065                                switch (attr)
7066                                {
7067                                    case DW_AT_type:
7068                                        type_die_offset = form_value.Reference(dwarf_cu); break;
7069                                    case DW_AT_containing_type:
7070                                        containing_type_die_offset = form_value.Reference(dwarf_cu); break;
7071                                }
7072                            }
7073                        }
7074
7075                        Type *pointee_type = ResolveTypeUID(type_die_offset);
7076                        Type *class_type = ResolveTypeUID(containing_type_die_offset);
7077
7078                        ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
7079                        ClangASTType class_clang_type = class_type->GetClangLayoutType();
7080
7081                        clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
7082
7083                        byte_size = clang_type.GetByteSize();
7084
7085                        type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7086                                                 this,
7087                                                 type_name_const_str,
7088                                                 byte_size,
7089                                                 NULL,
7090                                                 LLDB_INVALID_UID,
7091                                                 Type::eEncodingIsUID,
7092                                                 NULL,
7093                                                 clang_type,
7094                                                 Type::eResolveStateForward));
7095                    }
7096
7097                    break;
7098                }
7099            default:
7100                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",
7101                                                           die->GetOffset(),
7102                                                           tag,
7103                                                           DW_TAG_value_to_name(tag));
7104                break;
7105            }
7106
7107            if (type_sp.get())
7108            {
7109                const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7110                dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7111
7112                SymbolContextScope * symbol_context_scope = NULL;
7113                if (sc_parent_tag == DW_TAG_compile_unit)
7114                {
7115                    symbol_context_scope = sc.comp_unit;
7116                }
7117                else if (sc.function != NULL)
7118                {
7119                    symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7120                    if (symbol_context_scope == NULL)
7121                        symbol_context_scope = sc.function;
7122                }
7123
7124                if (symbol_context_scope != NULL)
7125                {
7126                    type_sp->SetSymbolContextScope(symbol_context_scope);
7127                }
7128
7129                // We are ready to put this type into the uniqued list up at the module level
7130                type_list->Insert (type_sp);
7131
7132                m_die_to_type[die] = type_sp.get();
7133            }
7134        }
7135        else if (type_ptr != DIE_IS_BEING_PARSED)
7136        {
7137            type_sp = type_ptr->shared_from_this();
7138        }
7139    }
7140    return type_sp;
7141}
7142
7143size_t
7144SymbolFileDWARF::ParseTypes
7145(
7146    const SymbolContext& sc,
7147    DWARFCompileUnit* dwarf_cu,
7148    const DWARFDebugInfoEntry *die,
7149    bool parse_siblings,
7150    bool parse_children
7151)
7152{
7153    size_t types_added = 0;
7154    while (die != NULL)
7155    {
7156        bool type_is_new = false;
7157        if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7158        {
7159            if (type_is_new)
7160                ++types_added;
7161        }
7162
7163        if (parse_children && die->HasChildren())
7164        {
7165            if (die->Tag() == DW_TAG_subprogram)
7166            {
7167                SymbolContext child_sc(sc);
7168                child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7169                types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7170            }
7171            else
7172                types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7173        }
7174
7175        if (parse_siblings)
7176            die = die->GetSibling();
7177        else
7178            die = NULL;
7179    }
7180    return types_added;
7181}
7182
7183
7184size_t
7185SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7186{
7187    assert(sc.comp_unit && sc.function);
7188    size_t functions_added = 0;
7189    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7190    if (dwarf_cu)
7191    {
7192        dw_offset_t function_die_offset = sc.function->GetID();
7193        const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7194        if (function_die)
7195        {
7196            ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7197        }
7198    }
7199
7200    return functions_added;
7201}
7202
7203
7204size_t
7205SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7206{
7207    // At least a compile unit must be valid
7208    assert(sc.comp_unit);
7209    size_t types_added = 0;
7210    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7211    if (dwarf_cu)
7212    {
7213        if (sc.function)
7214        {
7215            dw_offset_t function_die_offset = sc.function->GetID();
7216            const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7217            if (func_die && func_die->HasChildren())
7218            {
7219                types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7220            }
7221        }
7222        else
7223        {
7224            const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7225            if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7226            {
7227                types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7228            }
7229        }
7230    }
7231
7232    return types_added;
7233}
7234
7235size_t
7236SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7237{
7238    if (sc.comp_unit != NULL)
7239    {
7240        DWARFDebugInfo* info = DebugInfo();
7241        if (info == NULL)
7242            return 0;
7243
7244        if (sc.function)
7245        {
7246            DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7247
7248            if (dwarf_cu == NULL)
7249                return 0;
7250
7251            const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7252
7253            dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7254            if (func_lo_pc != LLDB_INVALID_ADDRESS)
7255            {
7256                const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7257
7258                // Let all blocks know they have parse all their variables
7259                sc.function->GetBlock (false).SetDidParseVariables (true, true);
7260                return num_variables;
7261            }
7262        }
7263        else if (sc.comp_unit)
7264        {
7265            DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7266
7267            if (dwarf_cu == NULL)
7268                return 0;
7269
7270            uint32_t vars_added = 0;
7271            VariableListSP variables (sc.comp_unit->GetVariableList(false));
7272
7273            if (variables.get() == NULL)
7274            {
7275                variables.reset(new VariableList());
7276                sc.comp_unit->SetVariableList(variables);
7277
7278                DWARFCompileUnit* match_dwarf_cu = NULL;
7279                const DWARFDebugInfoEntry* die = NULL;
7280                DIEArray die_offsets;
7281                if (m_using_apple_tables)
7282                {
7283                    if (m_apple_names_ap.get())
7284                    {
7285                        DWARFMappedHash::DIEInfoArray hash_data_array;
7286                        if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7287                                                                    dwarf_cu->GetNextCompileUnitOffset(),
7288                                                                    hash_data_array))
7289                        {
7290                            DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7291                        }
7292                    }
7293                }
7294                else
7295                {
7296                    // Index if we already haven't to make sure the compile units
7297                    // get indexed and make their global DIE index list
7298                    if (!m_indexed)
7299                        Index ();
7300
7301                    m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7302                                                                 dwarf_cu->GetNextCompileUnitOffset(),
7303                                                                 die_offsets);
7304                }
7305
7306                const size_t num_matches = die_offsets.size();
7307                if (num_matches)
7308                {
7309                    DWARFDebugInfo* debug_info = DebugInfo();
7310                    for (size_t i=0; i<num_matches; ++i)
7311                    {
7312                        const dw_offset_t die_offset = die_offsets[i];
7313                        die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7314                        if (die)
7315                        {
7316                            VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7317                            if (var_sp)
7318                            {
7319                                variables->AddVariableIfUnique (var_sp);
7320                                ++vars_added;
7321                            }
7322                        }
7323                        else
7324                        {
7325                            if (m_using_apple_tables)
7326                            {
7327                                GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7328                            }
7329                        }
7330
7331                    }
7332                }
7333            }
7334            return vars_added;
7335        }
7336    }
7337    return 0;
7338}
7339
7340
7341VariableSP
7342SymbolFileDWARF::ParseVariableDIE
7343(
7344    const SymbolContext& sc,
7345    DWARFCompileUnit* dwarf_cu,
7346    const DWARFDebugInfoEntry *die,
7347    const lldb::addr_t func_low_pc
7348)
7349{
7350
7351    VariableSP var_sp (m_die_to_variable_sp[die]);
7352    if (var_sp)
7353        return var_sp;  // Already been parsed!
7354
7355    const dw_tag_t tag = die->Tag();
7356    ModuleSP module = GetObjectFile()->GetModule();
7357
7358    if ((tag == DW_TAG_variable) ||
7359        (tag == DW_TAG_constant) ||
7360        (tag == DW_TAG_formal_parameter && sc.function))
7361    {
7362        DWARFDebugInfoEntry::Attributes attributes;
7363        const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7364        if (num_attributes > 0)
7365        {
7366            const char *name = NULL;
7367            const char *mangled = NULL;
7368            Declaration decl;
7369            uint32_t i;
7370            lldb::user_id_t type_uid = LLDB_INVALID_UID;
7371            DWARFExpression location;
7372            bool is_external = false;
7373            bool is_artificial = false;
7374            bool location_is_const_value_data = false;
7375            bool has_explicit_location = false;
7376            DWARFFormValue const_value;
7377            //AccessType accessibility = eAccessNone;
7378
7379            for (i=0; i<num_attributes; ++i)
7380            {
7381                dw_attr_t attr = attributes.AttributeAtIndex(i);
7382                DWARFFormValue form_value;
7383                if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7384                {
7385                    switch (attr)
7386                    {
7387                    case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7388                    case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7389                    case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7390                    case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7391                    case DW_AT_linkage_name:
7392                    case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7393                    case DW_AT_type:        type_uid = form_value.Reference(dwarf_cu); break;
7394                    case DW_AT_external:    is_external = form_value.Boolean(); break;
7395                    case DW_AT_const_value:
7396                        // If we have already found a DW_AT_location attribute, ignore this attribute.
7397                        if (!has_explicit_location)
7398                        {
7399                            location_is_const_value_data = true;
7400                            // The constant value will be either a block, a data value or a string.
7401                            const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7402                            if (DWARFFormValue::IsBlockForm(form_value.Form()))
7403                            {
7404                                // Retrieve the value as a block expression.
7405                                uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7406                                uint32_t block_length = form_value.Unsigned();
7407                                location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
7408                            }
7409                            else if (DWARFFormValue::IsDataForm(form_value.Form()))
7410                            {
7411                                // Retrieve the value as a data expression.
7412                                const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7413                                uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7414                                uint32_t data_length = fixed_form_sizes[form_value.Form()];
7415                                if (data_length == 0)
7416                                {
7417                                    const uint8_t *data_pointer = form_value.BlockData();
7418                                    if (data_pointer)
7419                                    {
7420                                        data_length = form_value.Unsigned();
7421                                    }
7422                                    else if (DWARFFormValue::IsDataForm(form_value.Form()))
7423                                    {
7424                                        // we need to get the byte size of the type later after we create the variable
7425                                        const_value = form_value;
7426                                    }
7427                                }
7428                                else
7429                                    location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7430                            }
7431                            else
7432                            {
7433                                // Retrieve the value as a string expression.
7434                                if (form_value.Form() == DW_FORM_strp)
7435                                {
7436                                    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7437                                    uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7438                                    uint32_t data_length = fixed_form_sizes[form_value.Form()];
7439                                    location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7440                                }
7441                                else
7442                                {
7443                                    const char *str = form_value.AsCString(&debug_info_data);
7444                                    uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7445                                    uint32_t string_length = strlen(str) + 1;
7446                                    location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
7447                                }
7448                            }
7449                        }
7450                        break;
7451                    case DW_AT_location:
7452                        {
7453                            location_is_const_value_data = false;
7454                            has_explicit_location = true;
7455                            if (form_value.BlockData())
7456                            {
7457                                const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7458
7459                                uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7460                                uint32_t block_length = form_value.Unsigned();
7461                                location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
7462                            }
7463                            else
7464                            {
7465                                const DWARFDataExtractor&    debug_loc_data = get_debug_loc_data();
7466                                const dw_offset_t debug_loc_offset = form_value.Unsigned();
7467
7468                                size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7469                                if (loc_list_length > 0)
7470                                {
7471                                    location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
7472                                    assert (func_low_pc != LLDB_INVALID_ADDRESS);
7473                                    location.SetLocationListSlide (func_low_pc - dwarf_cu->GetBaseAddress());
7474                                }
7475                            }
7476                        }
7477                        break;
7478
7479                    case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7480                    case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7481                    case DW_AT_declaration:
7482                    case DW_AT_description:
7483                    case DW_AT_endianity:
7484                    case DW_AT_segment:
7485                    case DW_AT_start_scope:
7486                    case DW_AT_visibility:
7487                    default:
7488                    case DW_AT_abstract_origin:
7489                    case DW_AT_sibling:
7490                    case DW_AT_specification:
7491                        break;
7492                    }
7493                }
7494            }
7495
7496            ValueType scope = eValueTypeInvalid;
7497
7498            const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7499            dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7500            SymbolContextScope * symbol_context_scope = NULL;
7501
7502            // DWARF doesn't specify if a DW_TAG_variable is a local, global
7503            // or static variable, so we have to do a little digging by
7504            // looking at the location of a variable to see if it contains
7505            // a DW_OP_addr opcode _somewhere_ in the definition. I say
7506            // somewhere because clang likes to combine small global variables
7507            // into the same symbol and have locations like:
7508            // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7509            // So if we don't have a DW_TAG_formal_parameter, we can look at
7510            // the location to see if it contains a DW_OP_addr opcode, and
7511            // then we can correctly classify  our variables.
7512            if (tag == DW_TAG_formal_parameter)
7513                scope = eValueTypeVariableArgument;
7514            else
7515            {
7516                bool op_error = false;
7517                // Check if the location has a DW_OP_addr with any address value...
7518                lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7519                if (!location_is_const_value_data)
7520                {
7521                    location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7522                    if (op_error)
7523                    {
7524                        StreamString strm;
7525                        location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7526                        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());
7527                    }
7528                }
7529
7530                if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7531                {
7532                    if (is_external)
7533                        scope = eValueTypeVariableGlobal;
7534                    else
7535                        scope = eValueTypeVariableStatic;
7536
7537
7538                    SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7539
7540                    if (debug_map_symfile)
7541                    {
7542                        // When leaving the DWARF in the .o files on darwin,
7543                        // when we have a global variable that wasn't initialized,
7544                        // the .o file might not have allocated a virtual
7545                        // address for the global variable. In this case it will
7546                        // have created a symbol for the global variable
7547                        // that is undefined/data and external and the value will
7548                        // be the byte size of the variable. When we do the
7549                        // address map in SymbolFileDWARFDebugMap we rely on
7550                        // having an address, we need to do some magic here
7551                        // so we can get the correct address for our global
7552                        // variable. The address for all of these entries
7553                        // will be zero, and there will be an undefined symbol
7554                        // in this object file, and the executable will have
7555                        // a matching symbol with a good address. So here we
7556                        // dig up the correct address and replace it in the
7557                        // location for the variable, and set the variable's
7558                        // symbol context scope to be that of the main executable
7559                        // so the file address will resolve correctly.
7560                        bool linked_oso_file_addr = false;
7561                        if (is_external && location_DW_OP_addr == 0)
7562                        {
7563                            // we have a possible uninitialized extern global
7564                            ConstString const_name(mangled ? mangled : name);
7565                            ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7566                            if (debug_map_objfile)
7567                            {
7568                                Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7569                                if (debug_map_symtab)
7570                                {
7571                                    Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7572                                                                                                           eSymbolTypeData,
7573                                                                                                           Symtab::eDebugYes,
7574                                                                                                           Symtab::eVisibilityExtern);
7575                                    if (exe_symbol)
7576                                    {
7577                                        if (exe_symbol->ValueIsAddress())
7578                                        {
7579                                            const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
7580                                            if (exe_file_addr != LLDB_INVALID_ADDRESS)
7581                                            {
7582                                                if (location.Update_DW_OP_addr (exe_file_addr))
7583                                                {
7584                                                    linked_oso_file_addr = true;
7585                                                    symbol_context_scope = exe_symbol;
7586                                                }
7587                                            }
7588                                        }
7589                                    }
7590                                }
7591                            }
7592                        }
7593
7594                        if (!linked_oso_file_addr)
7595                        {
7596                            // The DW_OP_addr is not zero, but it contains a .o file address which
7597                            // needs to be linked up correctly.
7598                            const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7599                            if (exe_file_addr != LLDB_INVALID_ADDRESS)
7600                            {
7601                                // Update the file address for this variable
7602                                location.Update_DW_OP_addr (exe_file_addr);
7603                            }
7604                            else
7605                            {
7606                                // Variable didn't make it into the final executable
7607                                return var_sp;
7608                            }
7609                        }
7610                    }
7611                }
7612                else
7613                {
7614                    scope = eValueTypeVariableLocal;
7615                }
7616            }
7617
7618            if (symbol_context_scope == NULL)
7619            {
7620                switch (parent_tag)
7621                {
7622                case DW_TAG_subprogram:
7623                case DW_TAG_inlined_subroutine:
7624                case DW_TAG_lexical_block:
7625                    if (sc.function)
7626                    {
7627                        symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7628                        if (symbol_context_scope == NULL)
7629                            symbol_context_scope = sc.function;
7630                    }
7631                    break;
7632
7633                default:
7634                    symbol_context_scope = sc.comp_unit;
7635                    break;
7636                }
7637            }
7638
7639            if (symbol_context_scope)
7640            {
7641                SymbolFileTypeSP type_sp(new SymbolFileType(*this, type_uid));
7642
7643                if (const_value.Form() && type_sp && type_sp->GetType())
7644                    location.CopyOpcodeData(const_value.Unsigned(), type_sp->GetType()->GetByteSize(), dwarf_cu->GetAddressByteSize());
7645
7646                var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7647                                            name,
7648                                            mangled,
7649                                            type_sp,
7650                                            scope,
7651                                            symbol_context_scope,
7652                                            &decl,
7653                                            location,
7654                                            is_external,
7655                                            is_artificial));
7656
7657                var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7658            }
7659            else
7660            {
7661                // Not ready to parse this variable yet. It might be a global
7662                // or static variable that is in a function scope and the function
7663                // in the symbol context wasn't filled in yet
7664                return var_sp;
7665            }
7666        }
7667        // Cache var_sp even if NULL (the variable was just a specification or
7668        // was missing vital information to be able to be displayed in the debugger
7669        // (missing location due to optimization, etc)) so we don't re-parse
7670        // this DIE over and over later...
7671        m_die_to_variable_sp[die] = var_sp;
7672    }
7673    return var_sp;
7674}
7675
7676
7677const DWARFDebugInfoEntry *
7678SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7679                                                   dw_offset_t spec_block_die_offset,
7680                                                   DWARFCompileUnit **result_die_cu_handle)
7681{
7682    // Give the concrete function die specified by "func_die_offset", find the
7683    // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7684    // to "spec_block_die_offset"
7685    DWARFDebugInfo* info = DebugInfo();
7686
7687    const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7688    if (die)
7689    {
7690        assert (*result_die_cu_handle);
7691        return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7692    }
7693    return NULL;
7694}
7695
7696
7697const DWARFDebugInfoEntry *
7698SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7699                                                  const DWARFDebugInfoEntry *die,
7700                                                  dw_offset_t spec_block_die_offset,
7701                                                  DWARFCompileUnit **result_die_cu_handle)
7702{
7703    if (die)
7704    {
7705        switch (die->Tag())
7706        {
7707        case DW_TAG_subprogram:
7708        case DW_TAG_inlined_subroutine:
7709        case DW_TAG_lexical_block:
7710            {
7711                if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7712                {
7713                    *result_die_cu_handle = dwarf_cu;
7714                    return die;
7715                }
7716
7717                if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7718                {
7719                    *result_die_cu_handle = dwarf_cu;
7720                    return die;
7721                }
7722            }
7723            break;
7724        }
7725
7726        // Give the concrete function die specified by "func_die_offset", find the
7727        // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7728        // to "spec_block_die_offset"
7729        for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7730        {
7731            const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7732                                                                                      child_die,
7733                                                                                      spec_block_die_offset,
7734                                                                                      result_die_cu_handle);
7735            if (result_die)
7736                return result_die;
7737        }
7738    }
7739
7740    *result_die_cu_handle = NULL;
7741    return NULL;
7742}
7743
7744size_t
7745SymbolFileDWARF::ParseVariables
7746(
7747    const SymbolContext& sc,
7748    DWARFCompileUnit* dwarf_cu,
7749    const lldb::addr_t func_low_pc,
7750    const DWARFDebugInfoEntry *orig_die,
7751    bool parse_siblings,
7752    bool parse_children,
7753    VariableList* cc_variable_list
7754)
7755{
7756    if (orig_die == NULL)
7757        return 0;
7758
7759    VariableListSP variable_list_sp;
7760
7761    size_t vars_added = 0;
7762    const DWARFDebugInfoEntry *die = orig_die;
7763    while (die != NULL)
7764    {
7765        dw_tag_t tag = die->Tag();
7766
7767        // Check to see if we have already parsed this variable or constant?
7768        if (m_die_to_variable_sp[die])
7769        {
7770            if (cc_variable_list)
7771                cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7772        }
7773        else
7774        {
7775            // We haven't already parsed it, lets do that now.
7776            if ((tag == DW_TAG_variable) ||
7777                (tag == DW_TAG_constant) ||
7778                (tag == DW_TAG_formal_parameter && sc.function))
7779            {
7780                if (variable_list_sp.get() == NULL)
7781                {
7782                    const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7783                    dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7784                    switch (parent_tag)
7785                    {
7786                        case DW_TAG_compile_unit:
7787                            if (sc.comp_unit != NULL)
7788                            {
7789                                variable_list_sp = sc.comp_unit->GetVariableList(false);
7790                                if (variable_list_sp.get() == NULL)
7791                                {
7792                                    variable_list_sp.reset(new VariableList());
7793                                    sc.comp_unit->SetVariableList(variable_list_sp);
7794                                }
7795                            }
7796                            else
7797                            {
7798                                GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7799                                                                           MakeUserID(sc_parent_die->GetOffset()),
7800                                                                           DW_TAG_value_to_name (parent_tag),
7801                                                                           MakeUserID(orig_die->GetOffset()),
7802                                                                           DW_TAG_value_to_name (orig_die->Tag()));
7803                            }
7804                            break;
7805
7806                        case DW_TAG_subprogram:
7807                        case DW_TAG_inlined_subroutine:
7808                        case DW_TAG_lexical_block:
7809                            if (sc.function != NULL)
7810                            {
7811                                // Check to see if we already have parsed the variables for the given scope
7812
7813                                Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7814                                if (block == NULL)
7815                                {
7816                                    // This must be a specification or abstract origin with
7817                                    // a concrete block counterpart in the current function. We need
7818                                    // to find the concrete block so we can correctly add the
7819                                    // variable to it
7820                                    DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7821                                    const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7822                                                                                                                      sc_parent_die->GetOffset(),
7823                                                                                                                      &concrete_block_die_cu);
7824                                    if (concrete_block_die)
7825                                        block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7826                                }
7827
7828                                if (block != NULL)
7829                                {
7830                                    const bool can_create = false;
7831                                    variable_list_sp = block->GetBlockVariableList (can_create);
7832                                    if (variable_list_sp.get() == NULL)
7833                                    {
7834                                        variable_list_sp.reset(new VariableList());
7835                                        block->SetVariableList(variable_list_sp);
7836                                    }
7837                                }
7838                            }
7839                            break;
7840
7841                        default:
7842                             GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7843                                                                        MakeUserID(orig_die->GetOffset()),
7844                                                                        DW_TAG_value_to_name (orig_die->Tag()));
7845                            break;
7846                    }
7847                }
7848
7849                if (variable_list_sp)
7850                {
7851                    VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7852                    if (var_sp)
7853                    {
7854                        variable_list_sp->AddVariableIfUnique (var_sp);
7855                        if (cc_variable_list)
7856                            cc_variable_list->AddVariableIfUnique (var_sp);
7857                        ++vars_added;
7858                    }
7859                }
7860            }
7861        }
7862
7863        bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7864
7865        if (!skip_children && parse_children && die->HasChildren())
7866        {
7867            vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7868        }
7869
7870        if (parse_siblings)
7871            die = die->GetSibling();
7872        else
7873            die = NULL;
7874    }
7875    return vars_added;
7876}
7877
7878//------------------------------------------------------------------
7879// PluginInterface protocol
7880//------------------------------------------------------------------
7881ConstString
7882SymbolFileDWARF::GetPluginName()
7883{
7884    return GetPluginNameStatic();
7885}
7886
7887uint32_t
7888SymbolFileDWARF::GetPluginVersion()
7889{
7890    return 1;
7891}
7892
7893void
7894SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7895{
7896    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7897    ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7898    if (clang_type)
7899        symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7900}
7901
7902void
7903SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7904{
7905    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7906    ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7907    if (clang_type)
7908        symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7909}
7910
7911void
7912SymbolFileDWARF::DumpIndexes ()
7913{
7914    StreamFile s(stdout, false);
7915
7916    s.Printf ("DWARF index for (%s) '%s':",
7917              GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7918              GetObjectFile()->GetFileSpec().GetPath().c_str());
7919    s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7920    s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7921    s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7922    s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7923    s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7924    s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7925    s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7926    s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7927}
7928
7929void
7930SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7931                                    const char *name,
7932                                    llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7933{
7934    DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7935
7936    if (iter == m_decl_ctx_to_die.end())
7937        return;
7938
7939    for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7940    {
7941        const DWARFDebugInfoEntry *context_die = *pos;
7942
7943        if (!results)
7944            return;
7945
7946        DWARFDebugInfo* info = DebugInfo();
7947
7948        DIEArray die_offsets;
7949
7950        DWARFCompileUnit* dwarf_cu = NULL;
7951        const DWARFDebugInfoEntry* die = NULL;
7952
7953        if (m_using_apple_tables)
7954        {
7955            if (m_apple_types_ap.get())
7956                m_apple_types_ap->FindByName (name, die_offsets);
7957        }
7958        else
7959        {
7960            if (!m_indexed)
7961                Index ();
7962
7963            m_type_index.Find (ConstString(name), die_offsets);
7964        }
7965
7966        const size_t num_matches = die_offsets.size();
7967
7968        if (num_matches)
7969        {
7970            for (size_t i = 0; i < num_matches; ++i)
7971            {
7972                const dw_offset_t die_offset = die_offsets[i];
7973                die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
7974
7975                if (die->GetParent() != context_die)
7976                    continue;
7977
7978                Type *matching_type = ResolveType (dwarf_cu, die);
7979
7980                clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
7981
7982                if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
7983                {
7984                    clang::TagDecl *tag_decl = tag_type->getDecl();
7985                    results->push_back(tag_decl);
7986                }
7987                else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
7988                {
7989                    clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
7990                    results->push_back(typedef_decl);
7991                }
7992            }
7993        }
7994    }
7995}
7996
7997void
7998SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
7999                                                 const clang::DeclContext *decl_context,
8000                                                 clang::DeclarationName decl_name,
8001                                                 llvm::SmallVectorImpl <clang::NamedDecl *> *results)
8002{
8003
8004    switch (decl_context->getDeclKind())
8005    {
8006    case clang::Decl::Namespace:
8007    case clang::Decl::TranslationUnit:
8008        {
8009            SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8010            symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
8011        }
8012        break;
8013    default:
8014        break;
8015    }
8016}
8017
8018bool
8019SymbolFileDWARF::LayoutRecordType (void *baton,
8020                                   const clang::RecordDecl *record_decl,
8021                                   uint64_t &size,
8022                                   uint64_t &alignment,
8023                                   llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
8024                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8025                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8026{
8027    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8028    return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
8029}
8030
8031
8032bool
8033SymbolFileDWARF::LayoutRecordType (const clang::RecordDecl *record_decl,
8034                                   uint64_t &bit_size,
8035                                   uint64_t &alignment,
8036                                   llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
8037                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8038                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8039{
8040    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
8041    RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
8042    bool success = false;
8043    base_offsets.clear();
8044    vbase_offsets.clear();
8045    if (pos != m_record_decl_to_layout_map.end())
8046    {
8047        bit_size = pos->second.bit_size;
8048        alignment = pos->second.alignment;
8049        field_offsets.swap(pos->second.field_offsets);
8050        base_offsets.swap (pos->second.base_offsets);
8051        vbase_offsets.swap (pos->second.vbase_offsets);
8052        m_record_decl_to_layout_map.erase(pos);
8053        success = true;
8054    }
8055    else
8056    {
8057        bit_size = 0;
8058        alignment = 0;
8059        field_offsets.clear();
8060    }
8061
8062    if (log)
8063        GetObjectFile()->GetModule()->LogMessage (log,
8064                                                  "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
8065                                                  static_cast<const void*>(record_decl),
8066                                                  bit_size, alignment,
8067                                                  static_cast<uint32_t>(field_offsets.size()),
8068                                                  static_cast<uint32_t>(base_offsets.size()),
8069                                                  static_cast<uint32_t>(vbase_offsets.size()),
8070                                                  success);
8071    return success;
8072}
8073
8074
8075SymbolFileDWARFDebugMap *
8076SymbolFileDWARF::GetDebugMapSymfile ()
8077{
8078    if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
8079    {
8080        lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
8081        if (module_sp)
8082        {
8083            SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
8084            if (sym_vendor)
8085                m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
8086        }
8087    }
8088    return m_debug_map_symfile;
8089}
8090
8091
8092