SymbolFileDWARF.cpp revision 97a19b21dacd9063bb5475812df7781777262198 
1//===-- SymbolFileDWARF.cpp ------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "SymbolFileDWARF.h"
11
12// Other libraries and framework includes
13#include "clang/AST/ASTConsumer.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/Decl.h"
16#include "clang/AST/DeclGroup.h"
17#include "clang/AST/DeclObjC.h"
18#include "clang/AST/DeclTemplate.h"
19#include "clang/Basic/Builtins.h"
20#include "clang/Basic/IdentifierTable.h"
21#include "clang/Basic/LangOptions.h"
22#include "clang/Basic/SourceManager.h"
23#include "clang/Basic/TargetInfo.h"
24#include "clang/Basic/Specifiers.h"
25#include "clang/Sema/DeclSpec.h"
26
27#include "llvm/Support/Casting.h"
28
29#include "lldb/Core/Module.h"
30#include "lldb/Core/PluginManager.h"
31#include "lldb/Core/RegularExpression.h"
32#include "lldb/Core/Scalar.h"
33#include "lldb/Core/Section.h"
34#include "lldb/Core/StreamFile.h"
35#include "lldb/Core/StreamString.h"
36#include "lldb/Core/Timer.h"
37#include "lldb/Core/Value.h"
38
39#include "lldb/Host/Host.h"
40
41#include "lldb/Symbol/Block.h"
42#include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
43#include "lldb/Symbol/CompileUnit.h"
44#include "lldb/Symbol/LineTable.h"
45#include "lldb/Symbol/ObjectFile.h"
46#include "lldb/Symbol/SymbolVendor.h"
47#include "lldb/Symbol/VariableList.h"
48
49#include "lldb/Target/ObjCLanguageRuntime.h"
50#include "lldb/Target/CPPLanguageRuntime.h"
51
52#include "DWARFCompileUnit.h"
53#include "DWARFDebugAbbrev.h"
54#include "DWARFDebugAranges.h"
55#include "DWARFDebugInfo.h"
56#include "DWARFDebugInfoEntry.h"
57#include "DWARFDebugLine.h"
58#include "DWARFDebugPubnames.h"
59#include "DWARFDebugRanges.h"
60#include "DWARFDeclContext.h"
61#include "DWARFDIECollection.h"
62#include "DWARFFormValue.h"
63#include "DWARFLocationList.h"
64#include "LogChannelDWARF.h"
65#include "SymbolFileDWARFDebugMap.h"
66
67#include <map>
68
69//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
70
71#ifdef ENABLE_DEBUG_PRINTF
72#include <stdio.h>
73#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
74#else
75#define DEBUG_PRINTF(fmt, ...)
76#endif
77
78#define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
79
80using namespace lldb;
81using namespace lldb_private;
82
83//static inline bool
84//child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
85//{
86//    switch (tag)
87//    {
88//    default:
89//        break;
90//    case DW_TAG_subprogram:
91//    case DW_TAG_inlined_subroutine:
92//    case DW_TAG_class_type:
93//    case DW_TAG_structure_type:
94//    case DW_TAG_union_type:
95//        return true;
96//    }
97//    return false;
98//}
99//
100static AccessType
101DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
102{
103    switch (dwarf_accessibility)
104    {
105        case DW_ACCESS_public:      return eAccessPublic;
106        case DW_ACCESS_private:     return eAccessPrivate;
107        case DW_ACCESS_protected:   return eAccessProtected;
108        default:                    break;
109    }
110    return eAccessNone;
111}
112
113#if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
114
115class DIEStack
116{
117public:
118
119    void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
120    {
121        m_dies.push_back (DIEInfo(cu, die));
122    }
123
124
125    void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
126    {
127        StreamString log_strm;
128        const size_t n = m_dies.size();
129        log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
130        for (size_t i=0; i<n; i++)
131        {
132            DWARFCompileUnit *cu = m_dies[i].cu;
133            const DWARFDebugInfoEntry *die = m_dies[i].die;
134            std::string qualified_name;
135            die->GetQualifiedName(dwarf, cu, qualified_name);
136            log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
137                             (uint64_t)i,
138                             die->GetOffset(),
139                             DW_TAG_value_to_name(die->Tag()),
140                             qualified_name.c_str());
141        }
142        log->PutCString(log_strm.GetData());
143    }
144    void Pop ()
145    {
146        m_dies.pop_back();
147    }
148
149    class ScopedPopper
150    {
151    public:
152        ScopedPopper (DIEStack &die_stack) :
153            m_die_stack (die_stack),
154            m_valid (false)
155        {
156        }
157
158        void
159        Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
160        {
161            m_valid = true;
162            m_die_stack.Push (cu, die);
163        }
164
165        ~ScopedPopper ()
166        {
167            if (m_valid)
168                m_die_stack.Pop();
169        }
170
171
172
173    protected:
174        DIEStack &m_die_stack;
175        bool m_valid;
176    };
177
178protected:
179    struct DIEInfo {
180        DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
181            cu(c),
182            die(d)
183        {
184        }
185        DWARFCompileUnit *cu;
186        const DWARFDebugInfoEntry *die;
187    };
188    typedef std::vector<DIEInfo> Stack;
189    Stack m_dies;
190};
191#endif
192
193void
194SymbolFileDWARF::Initialize()
195{
196    LogChannelDWARF::Initialize();
197    PluginManager::RegisterPlugin (GetPluginNameStatic(),
198                                   GetPluginDescriptionStatic(),
199                                   CreateInstance);
200}
201
202void
203SymbolFileDWARF::Terminate()
204{
205    PluginManager::UnregisterPlugin (CreateInstance);
206    LogChannelDWARF::Initialize();
207}
208
209
210const char *
211SymbolFileDWARF::GetPluginNameStatic()
212{
213    return "dwarf";
214}
215
216const char *
217SymbolFileDWARF::GetPluginDescriptionStatic()
218{
219    return "DWARF and DWARF3 debug symbol file reader.";
220}
221
222
223SymbolFile*
224SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
225{
226    return new SymbolFileDWARF(obj_file);
227}
228
229TypeList *
230SymbolFileDWARF::GetTypeList ()
231{
232    if (GetDebugMapSymfile ())
233        return m_debug_map_symfile->GetTypeList();
234    return m_obj_file->GetModule()->GetTypeList();
235
236}
237
238//----------------------------------------------------------------------
239// Gets the first parent that is a lexical block, function or inlined
240// subroutine, or compile unit.
241//----------------------------------------------------------------------
242static const DWARFDebugInfoEntry *
243GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
244{
245    const DWARFDebugInfoEntry *die;
246    for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
247    {
248        dw_tag_t tag = die->Tag();
249
250        switch (tag)
251        {
252        case DW_TAG_compile_unit:
253        case DW_TAG_subprogram:
254        case DW_TAG_inlined_subroutine:
255        case DW_TAG_lexical_block:
256            return die;
257        }
258    }
259    return NULL;
260}
261
262
263SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
264    SymbolFile (objfile),
265    UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
266    m_debug_map_module_wp (),
267    m_debug_map_symfile (NULL),
268    m_clang_tu_decl (NULL),
269    m_flags(),
270    m_data_debug_abbrev (),
271    m_data_debug_aranges (),
272    m_data_debug_frame (),
273    m_data_debug_info (),
274    m_data_debug_line (),
275    m_data_debug_loc (),
276    m_data_debug_ranges (),
277    m_data_debug_str (),
278    m_data_apple_names (),
279    m_data_apple_types (),
280    m_data_apple_namespaces (),
281    m_abbr(),
282    m_info(),
283    m_line(),
284    m_apple_names_ap (),
285    m_apple_types_ap (),
286    m_apple_namespaces_ap (),
287    m_apple_objc_ap (),
288    m_function_basename_index(),
289    m_function_fullname_index(),
290    m_function_method_index(),
291    m_function_selector_index(),
292    m_objc_class_selectors_index(),
293    m_global_index(),
294    m_type_index(),
295    m_namespace_index(),
296    m_indexed (false),
297    m_is_external_ast_source (false),
298    m_using_apple_tables (false),
299    m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
300    m_ranges(),
301    m_unique_ast_type_map ()
302{
303}
304
305SymbolFileDWARF::~SymbolFileDWARF()
306{
307    if (m_is_external_ast_source)
308    {
309        ModuleSP module_sp (m_obj_file->GetModule());
310        if (module_sp)
311            module_sp->GetClangASTContext().RemoveExternalSource ();
312    }
313}
314
315static const ConstString &
316GetDWARFMachOSegmentName ()
317{
318    static ConstString g_dwarf_section_name ("__DWARF");
319    return g_dwarf_section_name;
320}
321
322UniqueDWARFASTTypeMap &
323SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
324{
325    if (GetDebugMapSymfile ())
326        return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
327    return m_unique_ast_type_map;
328}
329
330ClangASTContext &
331SymbolFileDWARF::GetClangASTContext ()
332{
333    if (GetDebugMapSymfile ())
334        return m_debug_map_symfile->GetClangASTContext ();
335
336    ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
337    if (!m_is_external_ast_source)
338    {
339        m_is_external_ast_source = true;
340        llvm::OwningPtr<clang::ExternalASTSource> ast_source_ap (
341            new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
342                                                 SymbolFileDWARF::CompleteObjCInterfaceDecl,
343                                                 SymbolFileDWARF::FindExternalVisibleDeclsByName,
344                                                 SymbolFileDWARF::LayoutRecordType,
345                                                 this));
346        ast.SetExternalSource (ast_source_ap);
347    }
348    return ast;
349}
350
351void
352SymbolFileDWARF::InitializeObject()
353{
354    // Install our external AST source callbacks so we can complete Clang types.
355    ModuleSP module_sp (m_obj_file->GetModule());
356    if (module_sp)
357    {
358        const SectionList *section_list = m_obj_file->GetSectionList();
359
360        const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
361
362        // Memory map the DWARF mach-o segment so we have everything mmap'ed
363        // to keep our heap memory usage down.
364        if (section)
365            m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
366    }
367    get_apple_names_data();
368    if (m_data_apple_names.GetByteSize() > 0)
369    {
370        m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
371        if (m_apple_names_ap->IsValid())
372            m_using_apple_tables = true;
373        else
374            m_apple_names_ap.reset();
375    }
376    get_apple_types_data();
377    if (m_data_apple_types.GetByteSize() > 0)
378    {
379        m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
380        if (m_apple_types_ap->IsValid())
381            m_using_apple_tables = true;
382        else
383            m_apple_types_ap.reset();
384    }
385
386    get_apple_namespaces_data();
387    if (m_data_apple_namespaces.GetByteSize() > 0)
388    {
389        m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
390        if (m_apple_namespaces_ap->IsValid())
391            m_using_apple_tables = true;
392        else
393            m_apple_namespaces_ap.reset();
394    }
395
396    get_apple_objc_data();
397    if (m_data_apple_objc.GetByteSize() > 0)
398    {
399        m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
400        if (m_apple_objc_ap->IsValid())
401            m_using_apple_tables = true;
402        else
403            m_apple_objc_ap.reset();
404    }
405}
406
407bool
408SymbolFileDWARF::SupportedVersion(uint16_t version)
409{
410    return version == 2 || version == 3 || version == 4;
411}
412
413uint32_t
414SymbolFileDWARF::CalculateAbilities ()
415{
416    uint32_t abilities = 0;
417    if (m_obj_file != NULL)
418    {
419        const Section* section = NULL;
420        const SectionList *section_list = m_obj_file->GetSectionList();
421        if (section_list == NULL)
422            return 0;
423
424        uint64_t debug_abbrev_file_size = 0;
425        uint64_t debug_info_file_size = 0;
426        uint64_t debug_line_file_size = 0;
427
428        section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
429
430        if (section)
431            section_list = &section->GetChildren ();
432
433        section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
434        if (section != NULL)
435        {
436            debug_info_file_size = section->GetFileSize();
437
438            section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
439            if (section)
440                debug_abbrev_file_size = section->GetFileSize();
441            else
442                m_flags.Set (flagsGotDebugAbbrevData);
443
444            section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
445            if (!section)
446                m_flags.Set (flagsGotDebugArangesData);
447
448            section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
449            if (!section)
450                m_flags.Set (flagsGotDebugFrameData);
451
452            section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
453            if (section)
454                debug_line_file_size = section->GetFileSize();
455            else
456                m_flags.Set (flagsGotDebugLineData);
457
458            section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
459            if (!section)
460                m_flags.Set (flagsGotDebugLocData);
461
462            section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
463            if (!section)
464                m_flags.Set (flagsGotDebugMacInfoData);
465
466            section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
467            if (!section)
468                m_flags.Set (flagsGotDebugPubNamesData);
469
470            section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
471            if (!section)
472                m_flags.Set (flagsGotDebugPubTypesData);
473
474            section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
475            if (!section)
476                m_flags.Set (flagsGotDebugRangesData);
477
478            section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
479            if (!section)
480                m_flags.Set (flagsGotDebugStrData);
481        }
482        else
483        {
484            const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
485            if (symfile_dir_cstr)
486            {
487                if (strcasestr(symfile_dir_cstr, ".dsym"))
488                {
489                    if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
490                    {
491                        // We have a dSYM file that didn't have a any debug info.
492                        // If the string table has a size of 1, then it was made from
493                        // an executable with no debug info, or from an executable that
494                        // was stripped.
495                        section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
496                        if (section && section->GetFileSize() == 1)
497                        {
498                            m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
499                        }
500                    }
501                }
502            }
503        }
504
505        if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
506            abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
507
508        if (debug_line_file_size > 0)
509            abilities |= LineTables;
510    }
511    return abilities;
512}
513
514const DataExtractor&
515SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DataExtractor &data)
516{
517    if (m_flags.IsClear (got_flag))
518    {
519        m_flags.Set (got_flag);
520        const SectionList *section_list = m_obj_file->GetSectionList();
521        if (section_list)
522        {
523            SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
524            if (section_sp)
525            {
526                // See if we memory mapped the DWARF segment?
527                if (m_dwarf_data.GetByteSize())
528                {
529                    data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
530                }
531                else
532                {
533                    if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
534                        data.Clear();
535                }
536            }
537        }
538    }
539    return data;
540}
541
542const DataExtractor&
543SymbolFileDWARF::get_debug_abbrev_data()
544{
545    return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
546}
547
548const DataExtractor&
549SymbolFileDWARF::get_debug_aranges_data()
550{
551    return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
552}
553
554const DataExtractor&
555SymbolFileDWARF::get_debug_frame_data()
556{
557    return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
558}
559
560const DataExtractor&
561SymbolFileDWARF::get_debug_info_data()
562{
563    return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
564}
565
566const DataExtractor&
567SymbolFileDWARF::get_debug_line_data()
568{
569    return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
570}
571
572const DataExtractor&
573SymbolFileDWARF::get_debug_loc_data()
574{
575    return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
576}
577
578const DataExtractor&
579SymbolFileDWARF::get_debug_ranges_data()
580{
581    return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
582}
583
584const DataExtractor&
585SymbolFileDWARF::get_debug_str_data()
586{
587    return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
588}
589
590const DataExtractor&
591SymbolFileDWARF::get_apple_names_data()
592{
593    return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
594}
595
596const DataExtractor&
597SymbolFileDWARF::get_apple_types_data()
598{
599    return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
600}
601
602const DataExtractor&
603SymbolFileDWARF::get_apple_namespaces_data()
604{
605    return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
606}
607
608const DataExtractor&
609SymbolFileDWARF::get_apple_objc_data()
610{
611    return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
612}
613
614
615DWARFDebugAbbrev*
616SymbolFileDWARF::DebugAbbrev()
617{
618    if (m_abbr.get() == NULL)
619    {
620        const DataExtractor &debug_abbrev_data = get_debug_abbrev_data();
621        if (debug_abbrev_data.GetByteSize() > 0)
622        {
623            m_abbr.reset(new DWARFDebugAbbrev());
624            if (m_abbr.get())
625                m_abbr->Parse(debug_abbrev_data);
626        }
627    }
628    return m_abbr.get();
629}
630
631const DWARFDebugAbbrev*
632SymbolFileDWARF::DebugAbbrev() const
633{
634    return m_abbr.get();
635}
636
637
638DWARFDebugInfo*
639SymbolFileDWARF::DebugInfo()
640{
641    if (m_info.get() == NULL)
642    {
643        Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
644        if (get_debug_info_data().GetByteSize() > 0)
645        {
646            m_info.reset(new DWARFDebugInfo());
647            if (m_info.get())
648            {
649                m_info->SetDwarfData(this);
650            }
651        }
652    }
653    return m_info.get();
654}
655
656const DWARFDebugInfo*
657SymbolFileDWARF::DebugInfo() const
658{
659    return m_info.get();
660}
661
662DWARFCompileUnit*
663SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
664{
665    DWARFDebugInfo* info = DebugInfo();
666    if (info)
667    {
668        if (GetDebugMapSymfile ())
669        {
670            // The debug map symbol file made the compile units for this DWARF
671            // file which is .o file with DWARF in it, and we should have
672            // only 1 compile unit which is at offset zero in the DWARF.
673            // TODO: modify to support LTO .o files where each .o file might
674            // have multiple DW_TAG_compile_unit tags.
675            return info->GetCompileUnit(0).get();
676        }
677        else
678        {
679            // Just a normal DWARF file whose user ID for the compile unit is
680            // the DWARF offset itself
681            return info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
682        }
683    }
684    return NULL;
685}
686
687
688DWARFDebugRanges*
689SymbolFileDWARF::DebugRanges()
690{
691    if (m_ranges.get() == NULL)
692    {
693        Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
694        if (get_debug_ranges_data().GetByteSize() > 0)
695        {
696            m_ranges.reset(new DWARFDebugRanges());
697            if (m_ranges.get())
698                m_ranges->Extract(this);
699        }
700    }
701    return m_ranges.get();
702}
703
704const DWARFDebugRanges*
705SymbolFileDWARF::DebugRanges() const
706{
707    return m_ranges.get();
708}
709
710lldb::CompUnitSP
711SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
712{
713    CompUnitSP cu_sp;
714    if (dwarf_cu)
715    {
716        CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
717        if (comp_unit)
718        {
719            // We already parsed this compile unit, had out a shared pointer to it
720            cu_sp = comp_unit->shared_from_this();
721        }
722        else
723        {
724            if (GetDebugMapSymfile ())
725            {
726                // Let the debug map create the compile unit
727                cu_sp = m_debug_map_symfile->GetCompileUnit(this);
728                dwarf_cu->SetUserData(cu_sp.get());
729            }
730            else
731            {
732                ModuleSP module_sp (m_obj_file->GetModule());
733                if (module_sp)
734                {
735                    const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
736                    if (cu_die)
737                    {
738                        const char * cu_die_name = cu_die->GetName(this, dwarf_cu);
739                        const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
740                        LanguageType cu_language = (LanguageType)cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
741                        if (cu_die_name)
742                        {
743                            std::string ramapped_file;
744                            FileSpec cu_file_spec;
745
746                            if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
747                            {
748                                // If we have a full path to the compile unit, we don't need to resolve
749                                // the file.  This can be expensive e.g. when the source files are NFS mounted.
750                                if (module_sp->RemapSourceFile(cu_die_name, ramapped_file))
751                                    cu_file_spec.SetFile (ramapped_file.c_str(), false);
752                                else
753                                    cu_file_spec.SetFile (cu_die_name, false);
754                            }
755                            else
756                            {
757                                std::string fullpath(cu_comp_dir);
758                                if (*fullpath.rbegin() != '/')
759                                    fullpath += '/';
760                                fullpath += cu_die_name;
761                                if (module_sp->RemapSourceFile (fullpath.c_str(), ramapped_file))
762                                    cu_file_spec.SetFile (ramapped_file.c_str(), false);
763                                else
764                                    cu_file_spec.SetFile (fullpath.c_str(), false);
765                            }
766
767                            cu_sp.reset(new CompileUnit (module_sp,
768                                                         dwarf_cu,
769                                                         cu_file_spec,
770                                                         MakeUserID(dwarf_cu->GetOffset()),
771                                                         cu_language));
772                            if (cu_sp)
773                            {
774                                dwarf_cu->SetUserData(cu_sp.get());
775
776                                // Figure out the compile unit index if we weren't given one
777                                if (cu_idx == UINT32_MAX)
778                                    DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
779
780                                m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
781                            }
782                        }
783                    }
784                }
785            }
786        }
787    }
788    return cu_sp;
789}
790
791uint32_t
792SymbolFileDWARF::GetNumCompileUnits()
793{
794    DWARFDebugInfo* info = DebugInfo();
795    if (info)
796        return info->GetNumCompileUnits();
797    return 0;
798}
799
800CompUnitSP
801SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
802{
803    CompUnitSP cu_sp;
804    DWARFDebugInfo* info = DebugInfo();
805    if (info)
806    {
807        DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
808        if (dwarf_cu)
809            cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
810    }
811    return cu_sp;
812}
813
814static void
815AddRangesToBlock (Block& block,
816                  DWARFDebugRanges::RangeList& ranges,
817                  addr_t block_base_addr)
818{
819    const size_t num_ranges = ranges.GetSize();
820    for (size_t i = 0; i<num_ranges; ++i)
821    {
822        const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
823        const addr_t range_base = range.GetRangeBase();
824        assert (range_base >= block_base_addr);
825        block.AddRange(Block::Range (range_base - block_base_addr, range.GetByteSize()));;
826    }
827    block.FinalizeRanges ();
828}
829
830
831Function *
832SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
833{
834    DWARFDebugRanges::RangeList func_ranges;
835    const char *name = NULL;
836    const char *mangled = NULL;
837    int decl_file = 0;
838    int decl_line = 0;
839    int decl_column = 0;
840    int call_file = 0;
841    int call_line = 0;
842    int call_column = 0;
843    DWARFExpression frame_base;
844
845    assert (die->Tag() == DW_TAG_subprogram);
846
847    if (die->Tag() != DW_TAG_subprogram)
848        return NULL;
849
850    if (die->GetDIENamesAndRanges (this,
851                                   dwarf_cu,
852                                   name,
853                                   mangled,
854                                   func_ranges,
855                                   decl_file,
856                                   decl_line,
857                                   decl_column,
858                                   call_file,
859                                   call_line,
860                                   call_column,
861                                   &frame_base))
862    {
863        // Union of all ranges in the function DIE (if the function is discontiguous)
864        AddressRange func_range;
865        lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
866        lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
867        if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
868        {
869            func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, m_obj_file->GetSectionList());
870            if (func_range.GetBaseAddress().IsValid())
871                func_range.SetByteSize(highest_func_addr - lowest_func_addr);
872        }
873
874        if (func_range.GetBaseAddress().IsValid())
875        {
876            Mangled func_name;
877            if (mangled)
878                func_name.SetValue(ConstString(mangled), true);
879            else if (name)
880                func_name.SetValue(ConstString(name), false);
881
882            FunctionSP func_sp;
883            std::unique_ptr<Declaration> decl_ap;
884            if (decl_file != 0 || decl_line != 0 || decl_column != 0)
885                decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
886                                               decl_line,
887                                               decl_column));
888
889            // Supply the type _only_ if it has already been parsed
890            Type *func_type = m_die_to_type.lookup (die);
891
892            assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
893
894            if (FixupAddress (func_range.GetBaseAddress()))
895            {
896                const user_id_t func_user_id = MakeUserID(die->GetOffset());
897                func_sp.reset(new Function (sc.comp_unit,
898                                            MakeUserID(func_user_id),       // UserID is the DIE offset
899                                            MakeUserID(func_user_id),
900                                            func_name,
901                                            func_type,
902                                            func_range));           // first address range
903
904                if (func_sp.get() != NULL)
905                {
906                    if (frame_base.IsValid())
907                        func_sp->GetFrameBaseExpression() = frame_base;
908                    sc.comp_unit->AddFunction(func_sp);
909                    return func_sp.get();
910                }
911            }
912        }
913    }
914    return NULL;
915}
916
917bool
918SymbolFileDWARF::FixupAddress (Address &addr)
919{
920    SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
921    if (debug_map_symfile)
922    {
923        return debug_map_symfile->LinkOSOAddress(addr);
924    }
925    // This is a normal DWARF file, no address fixups need to happen
926    return true;
927}
928lldb::LanguageType
929SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
930{
931    assert (sc.comp_unit);
932    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
933    if (dwarf_cu)
934    {
935        const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
936        if (die)
937        {
938            const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
939            if (language)
940                return (lldb::LanguageType)language;
941        }
942    }
943    return eLanguageTypeUnknown;
944}
945
946size_t
947SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
948{
949    assert (sc.comp_unit);
950    size_t functions_added = 0;
951    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
952    if (dwarf_cu)
953    {
954        DWARFDIECollection function_dies;
955        const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
956        size_t func_idx;
957        for (func_idx = 0; func_idx < num_functions; ++func_idx)
958        {
959            const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
960            if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
961            {
962                if (ParseCompileUnitFunction(sc, dwarf_cu, die))
963                    ++functions_added;
964            }
965        }
966        //FixupTypes();
967    }
968    return functions_added;
969}
970
971bool
972SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
973{
974    assert (sc.comp_unit);
975    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
976    if (dwarf_cu)
977    {
978        const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
979
980        if (cu_die)
981        {
982            const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
983            dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
984
985            // All file indexes in DWARF are one based and a file of index zero is
986            // supposed to be the compile unit itself.
987            support_files.Append (*sc.comp_unit);
988
989            return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
990        }
991    }
992    return false;
993}
994
995struct ParseDWARFLineTableCallbackInfo
996{
997    LineTable* line_table;
998    std::unique_ptr<LineSequence> sequence_ap;
999};
1000
1001//----------------------------------------------------------------------
1002// ParseStatementTableCallback
1003//----------------------------------------------------------------------
1004static void
1005ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1006{
1007    if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1008    {
1009        // Just started parsing the line table
1010    }
1011    else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1012    {
1013        // Done parsing line table, nothing to do for the cleanup
1014    }
1015    else
1016    {
1017        ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1018        LineTable* line_table = info->line_table;
1019
1020        // If this is our first time here, we need to create a
1021        // sequence container.
1022        if (!info->sequence_ap.get())
1023        {
1024            info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1025            assert(info->sequence_ap.get());
1026        }
1027        line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1028                                               state.address,
1029                                               state.line,
1030                                               state.column,
1031                                               state.file,
1032                                               state.is_stmt,
1033                                               state.basic_block,
1034                                               state.prologue_end,
1035                                               state.epilogue_begin,
1036                                               state.end_sequence);
1037        if (state.end_sequence)
1038        {
1039            // First, put the current sequence into the line table.
1040            line_table->InsertSequence(info->sequence_ap.get());
1041            // Then, empty it to prepare for the next sequence.
1042            info->sequence_ap->Clear();
1043        }
1044    }
1045}
1046
1047bool
1048SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1049{
1050    assert (sc.comp_unit);
1051    if (sc.comp_unit->GetLineTable() != NULL)
1052        return true;
1053
1054    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1055    if (dwarf_cu)
1056    {
1057        const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1058        if (dwarf_cu_die)
1059        {
1060            const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1061            if (cu_line_offset != DW_INVALID_OFFSET)
1062            {
1063                std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1064                if (line_table_ap.get())
1065                {
1066                    ParseDWARFLineTableCallbackInfo info;
1067                    info.line_table = line_table_ap.get();
1068                    lldb::offset_t offset = cu_line_offset;
1069                    DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1070                    if (m_debug_map_symfile)
1071                    {
1072                        // We have an object file that has a line table with addresses
1073                        // that are not linked. We need to link the line table and convert
1074                        // the addresses that are relative to the .o file into addresses
1075                        // for the main executable.
1076                        sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1077                    }
1078                    else
1079                    {
1080                        sc.comp_unit->SetLineTable(line_table_ap.release());
1081                        return true;
1082                    }
1083                }
1084            }
1085        }
1086    }
1087    return false;
1088}
1089
1090size_t
1091SymbolFileDWARF::ParseFunctionBlocks
1092(
1093    const SymbolContext& sc,
1094    Block *parent_block,
1095    DWARFCompileUnit* dwarf_cu,
1096    const DWARFDebugInfoEntry *die,
1097    addr_t subprogram_low_pc,
1098    uint32_t depth
1099)
1100{
1101    size_t blocks_added = 0;
1102    while (die != NULL)
1103    {
1104        dw_tag_t tag = die->Tag();
1105
1106        switch (tag)
1107        {
1108        case DW_TAG_inlined_subroutine:
1109        case DW_TAG_subprogram:
1110        case DW_TAG_lexical_block:
1111            {
1112                Block *block = NULL;
1113                if (tag == DW_TAG_subprogram)
1114                {
1115                    // Skip any DW_TAG_subprogram DIEs that are inside
1116                    // of a normal or inlined functions. These will be
1117                    // parsed on their own as separate entities.
1118
1119                    if (depth > 0)
1120                        break;
1121
1122                    block = parent_block;
1123                }
1124                else
1125                {
1126                    BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1127                    parent_block->AddChild(block_sp);
1128                    block = block_sp.get();
1129                }
1130                DWARFDebugRanges::RangeList ranges;
1131                const char *name = NULL;
1132                const char *mangled_name = NULL;
1133
1134                int decl_file = 0;
1135                int decl_line = 0;
1136                int decl_column = 0;
1137                int call_file = 0;
1138                int call_line = 0;
1139                int call_column = 0;
1140                if (die->GetDIENamesAndRanges (this,
1141                                               dwarf_cu,
1142                                               name,
1143                                               mangled_name,
1144                                               ranges,
1145                                               decl_file, decl_line, decl_column,
1146                                               call_file, call_line, call_column))
1147                {
1148                    if (tag == DW_TAG_subprogram)
1149                    {
1150                        assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1151                        subprogram_low_pc = ranges.GetMinRangeBase(0);
1152                    }
1153                    else if (tag == DW_TAG_inlined_subroutine)
1154                    {
1155                        // We get called here for inlined subroutines in two ways.
1156                        // The first time is when we are making the Function object
1157                        // for this inlined concrete instance.  Since we're creating a top level block at
1158                        // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1159                        // adjust the containing address.
1160                        // The second time is when we are parsing the blocks inside the function that contains
1161                        // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1162                        // function the offset will be for that function.
1163                        if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1164                        {
1165                            subprogram_low_pc = ranges.GetMinRangeBase(0);
1166                        }
1167                    }
1168
1169                    AddRangesToBlock (*block, ranges, subprogram_low_pc);
1170
1171                    if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1172                    {
1173                        std::unique_ptr<Declaration> decl_ap;
1174                        if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1175                            decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1176                                                          decl_line, decl_column));
1177
1178                        std::unique_ptr<Declaration> call_ap;
1179                        if (call_file != 0 || call_line != 0 || call_column != 0)
1180                            call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1181                                                          call_line, call_column));
1182
1183                        block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1184                    }
1185
1186                    ++blocks_added;
1187
1188                    if (die->HasChildren())
1189                    {
1190                        blocks_added += ParseFunctionBlocks (sc,
1191                                                             block,
1192                                                             dwarf_cu,
1193                                                             die->GetFirstChild(),
1194                                                             subprogram_low_pc,
1195                                                             depth + 1);
1196                    }
1197                }
1198            }
1199            break;
1200        default:
1201            break;
1202        }
1203
1204        // Only parse siblings of the block if we are not at depth zero. A depth
1205        // of zero indicates we are currently parsing the top level
1206        // DW_TAG_subprogram DIE
1207
1208        if (depth == 0)
1209            die = NULL;
1210        else
1211            die = die->GetSibling();
1212    }
1213    return blocks_added;
1214}
1215
1216bool
1217SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1218                                   const DWARFDebugInfoEntry *die,
1219                                   ClangASTContext::TemplateParameterInfos &template_param_infos)
1220{
1221    const dw_tag_t tag = die->Tag();
1222
1223    switch (tag)
1224    {
1225    case DW_TAG_template_type_parameter:
1226    case DW_TAG_template_value_parameter:
1227        {
1228            const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1229
1230            DWARFDebugInfoEntry::Attributes attributes;
1231            const size_t num_attributes = die->GetAttributes (this,
1232                                                              dwarf_cu,
1233                                                              fixed_form_sizes,
1234                                                              attributes);
1235            const char *name = NULL;
1236            Type *lldb_type = NULL;
1237            clang_type_t clang_type = NULL;
1238            uint64_t uval64 = 0;
1239            bool uval64_valid = false;
1240            if (num_attributes > 0)
1241            {
1242                DWARFFormValue form_value;
1243                for (size_t i=0; i<num_attributes; ++i)
1244                {
1245                    const dw_attr_t attr = attributes.AttributeAtIndex(i);
1246
1247                    switch (attr)
1248                    {
1249                        case DW_AT_name:
1250                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1251                                name = form_value.AsCString(&get_debug_str_data());
1252                            break;
1253
1254                        case DW_AT_type:
1255                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1256                            {
1257                                const dw_offset_t type_die_offset = form_value.Reference(dwarf_cu);
1258                                lldb_type = ResolveTypeUID(type_die_offset);
1259                                if (lldb_type)
1260                                    clang_type = lldb_type->GetClangForwardType();
1261                            }
1262                            break;
1263
1264                        case DW_AT_const_value:
1265                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1266                            {
1267                                uval64_valid = true;
1268                                uval64 = form_value.Unsigned();
1269                            }
1270                            break;
1271                        default:
1272                            break;
1273                    }
1274                }
1275
1276                clang::ASTContext *ast = GetClangASTContext().getASTContext();
1277                if (!clang_type)
1278                    clang_type = ast->VoidTy.getAsOpaquePtr();
1279
1280                if (clang_type)
1281                {
1282                    bool is_signed = false;
1283                    if (name && name[0])
1284                        template_param_infos.names.push_back(name);
1285                    else
1286                        template_param_infos.names.push_back(NULL);
1287
1288                    clang::QualType clang_qual_type (clang::QualType::getFromOpaquePtr (clang_type));
1289                    if (tag == DW_TAG_template_value_parameter &&
1290                        lldb_type != NULL &&
1291                        ClangASTContext::IsIntegerType (clang_type, is_signed) &&
1292                        uval64_valid)
1293                    {
1294                        llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1295                        template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1296                                                                                      llvm::APSInt(apint),
1297                                                                                      clang_qual_type));
1298                    }
1299                    else
1300                    {
1301                        template_param_infos.args.push_back (clang::TemplateArgument (clang_qual_type));
1302                    }
1303                }
1304                else
1305                {
1306                    return false;
1307                }
1308
1309            }
1310        }
1311        return true;
1312
1313    default:
1314        break;
1315    }
1316    return false;
1317}
1318
1319bool
1320SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1321                                              const DWARFDebugInfoEntry *parent_die,
1322                                              ClangASTContext::TemplateParameterInfos &template_param_infos)
1323{
1324
1325    if (parent_die == NULL)
1326        return false;
1327
1328    Args template_parameter_names;
1329    for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1330         die != NULL;
1331         die = die->GetSibling())
1332    {
1333        const dw_tag_t tag = die->Tag();
1334
1335        switch (tag)
1336        {
1337            case DW_TAG_template_type_parameter:
1338            case DW_TAG_template_value_parameter:
1339                ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1340            break;
1341
1342        default:
1343            break;
1344        }
1345    }
1346    if (template_param_infos.args.empty())
1347        return false;
1348    return template_param_infos.args.size() == template_param_infos.names.size();
1349}
1350
1351clang::ClassTemplateDecl *
1352SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1353                                         lldb::AccessType access_type,
1354                                         const char *parent_name,
1355                                         int tag_decl_kind,
1356                                         const ClangASTContext::TemplateParameterInfos &template_param_infos)
1357{
1358    if (template_param_infos.IsValid())
1359    {
1360        std::string template_basename(parent_name);
1361        template_basename.erase (template_basename.find('<'));
1362        ClangASTContext &ast = GetClangASTContext();
1363
1364        return ast.CreateClassTemplateDecl (decl_ctx,
1365                                            access_type,
1366                                            template_basename.c_str(),
1367                                            tag_decl_kind,
1368                                            template_param_infos);
1369    }
1370    return NULL;
1371}
1372
1373class SymbolFileDWARF::DelayedAddObjCClassProperty
1374{
1375public:
1376    DelayedAddObjCClassProperty
1377    (
1378        clang::ASTContext      *ast,
1379        lldb::clang_type_t      class_opaque_type,
1380        const char             *property_name,
1381        lldb::clang_type_t      property_opaque_type,  // The property type is only required if you don't have an ivar decl
1382        clang::ObjCIvarDecl    *ivar_decl,
1383        const char             *property_setter_name,
1384        const char             *property_getter_name,
1385        uint32_t                property_attributes,
1386        const ClangASTMetadata *metadata
1387    ) :
1388        m_ast                   (ast),
1389        m_class_opaque_type     (class_opaque_type),
1390        m_property_name         (property_name),
1391        m_property_opaque_type  (property_opaque_type),
1392        m_ivar_decl             (ivar_decl),
1393        m_property_setter_name  (property_setter_name),
1394        m_property_getter_name  (property_getter_name),
1395        m_property_attributes   (property_attributes)
1396    {
1397        if (metadata != NULL)
1398        {
1399            m_metadata_ap.reset(new ClangASTMetadata());
1400            *m_metadata_ap = *metadata;
1401        }
1402    }
1403
1404    DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1405    {
1406      *this = rhs;
1407    }
1408
1409    DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1410    {
1411        m_ast                  = rhs.m_ast;
1412        m_class_opaque_type    = rhs.m_class_opaque_type;
1413        m_property_name        = rhs.m_property_name;
1414        m_property_opaque_type = rhs.m_property_opaque_type;
1415        m_ivar_decl            = rhs.m_ivar_decl;
1416        m_property_setter_name = rhs.m_property_setter_name;
1417        m_property_getter_name = rhs.m_property_getter_name;
1418        m_property_attributes  = rhs.m_property_attributes;
1419
1420        if (rhs.m_metadata_ap.get())
1421        {
1422            m_metadata_ap.reset (new ClangASTMetadata());
1423            *m_metadata_ap = *rhs.m_metadata_ap;
1424        }
1425        return *this;
1426    }
1427
1428    bool Finalize() const
1429    {
1430        return ClangASTContext::AddObjCClassProperty (m_ast,
1431                                                      m_class_opaque_type,
1432                                                      m_property_name,
1433                                                      m_property_opaque_type,
1434                                                      m_ivar_decl,
1435                                                      m_property_setter_name,
1436                                                      m_property_getter_name,
1437                                                      m_property_attributes,
1438                                                      m_metadata_ap.get());
1439    }
1440private:
1441    clang::ASTContext      *m_ast;
1442    lldb::clang_type_t      m_class_opaque_type;
1443    const char             *m_property_name;
1444    lldb::clang_type_t      m_property_opaque_type;
1445    clang::ObjCIvarDecl    *m_ivar_decl;
1446    const char             *m_property_setter_name;
1447    const char             *m_property_getter_name;
1448    uint32_t                m_property_attributes;
1449    std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1450};
1451
1452struct BitfieldInfo
1453{
1454    uint64_t bit_size;
1455    uint64_t bit_offset;
1456
1457    BitfieldInfo () :
1458        bit_size (LLDB_INVALID_ADDRESS),
1459        bit_offset (LLDB_INVALID_ADDRESS)
1460    {
1461    }
1462
1463    bool IsValid ()
1464    {
1465        return (bit_size != LLDB_INVALID_ADDRESS) &&
1466               (bit_offset != LLDB_INVALID_ADDRESS);
1467    }
1468};
1469
1470
1471bool
1472SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1473                                         const DWARFDebugInfoEntry *parent_die)
1474{
1475    if (parent_die)
1476    {
1477        for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1478        {
1479            dw_tag_t tag = die->Tag();
1480            bool check_virtuality = false;
1481            switch (tag)
1482            {
1483                case DW_TAG_inheritance:
1484                case DW_TAG_subprogram:
1485                    check_virtuality = true;
1486                    break;
1487                default:
1488                    break;
1489            }
1490            if (check_virtuality)
1491            {
1492                if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1493                    return true;
1494            }
1495        }
1496    }
1497    return false;
1498}
1499
1500size_t
1501SymbolFileDWARF::ParseChildMembers
1502(
1503    const SymbolContext& sc,
1504    DWARFCompileUnit* dwarf_cu,
1505    const DWARFDebugInfoEntry *parent_die,
1506    clang_type_t class_clang_type,
1507    const LanguageType class_language,
1508    std::vector<clang::CXXBaseSpecifier *>& base_classes,
1509    std::vector<int>& member_accessibilities,
1510    DWARFDIECollection& member_function_dies,
1511    DelayedPropertyList& delayed_properties,
1512    AccessType& default_accessibility,
1513    bool &is_a_class,
1514    LayoutInfo &layout_info
1515)
1516{
1517    if (parent_die == NULL)
1518        return 0;
1519
1520    size_t count = 0;
1521    const DWARFDebugInfoEntry *die;
1522    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1523    uint32_t member_idx = 0;
1524    BitfieldInfo last_field_info;
1525
1526    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1527    {
1528        dw_tag_t tag = die->Tag();
1529
1530        switch (tag)
1531        {
1532        case DW_TAG_member:
1533        case DW_TAG_APPLE_property:
1534            {
1535                DWARFDebugInfoEntry::Attributes attributes;
1536                const size_t num_attributes = die->GetAttributes (this,
1537                                                                  dwarf_cu,
1538                                                                  fixed_form_sizes,
1539                                                                  attributes);
1540                if (num_attributes > 0)
1541                {
1542                    Declaration decl;
1543                    //DWARFExpression location;
1544                    const char *name = NULL;
1545                    const char *prop_name = NULL;
1546                    const char *prop_getter_name = NULL;
1547                    const char *prop_setter_name = NULL;
1548                    uint32_t prop_attributes = 0;
1549
1550
1551                    bool is_artificial = false;
1552                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1553                    AccessType accessibility = eAccessNone;
1554                    uint32_t member_byte_offset = UINT32_MAX;
1555                    size_t byte_size = 0;
1556                    size_t bit_offset = 0;
1557                    size_t bit_size = 0;
1558                    bool is_external = false; // On DW_TAG_members, this means the member is static
1559                    uint32_t i;
1560                    for (i=0; i<num_attributes && !is_artificial; ++i)
1561                    {
1562                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
1563                        DWARFFormValue form_value;
1564                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1565                        {
1566                            switch (attr)
1567                            {
1568                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1569                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1570                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1571                            case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1572                            case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
1573                            case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1574                            case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1575                            case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1576                            case DW_AT_data_member_location:
1577                                if (form_value.BlockData())
1578                                {
1579                                    Value initialValue(0);
1580                                    Value memberOffset(0);
1581                                    const DataExtractor& debug_info_data = get_debug_info_data();
1582                                    uint32_t block_length = form_value.Unsigned();
1583                                    uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1584                                    if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1585                                                                  NULL, // clang::ASTContext *
1586                                                                  NULL, // ClangExpressionVariableList *
1587                                                                  NULL, // ClangExpressionDeclMap *
1588                                                                  NULL, // RegisterContext *
1589                                                                  debug_info_data,
1590                                                                  block_offset,
1591                                                                  block_length,
1592                                                                  eRegisterKindDWARF,
1593                                                                  &initialValue,
1594                                                                  memberOffset,
1595                                                                  NULL))
1596                                    {
1597                                        member_byte_offset = memberOffset.ResolveValue(NULL, NULL).UInt();
1598                                    }
1599                                }
1600                                break;
1601
1602                            case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1603                            case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1604                            case DW_AT_APPLE_property_name:      prop_name = form_value.AsCString(&get_debug_str_data()); break;
1605                            case DW_AT_APPLE_property_getter:    prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1606                            case DW_AT_APPLE_property_setter:    prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1607                            case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1608                            case DW_AT_external:                 is_external = form_value.Boolean(); break;
1609
1610                            default:
1611                            case DW_AT_declaration:
1612                            case DW_AT_description:
1613                            case DW_AT_mutable:
1614                            case DW_AT_visibility:
1615                            case DW_AT_sibling:
1616                                break;
1617                            }
1618                        }
1619                    }
1620
1621                    if (prop_name)
1622                    {
1623                        ConstString fixed_getter;
1624                        ConstString fixed_setter;
1625
1626                        // Check if the property getter/setter were provided as full
1627                        // names.  We want basenames, so we extract them.
1628
1629                        if (prop_getter_name && prop_getter_name[0] == '-')
1630                        {
1631                            ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1632                            prop_getter_name = prop_getter_method.GetSelector().GetCString();
1633                        }
1634
1635                        if (prop_setter_name && prop_setter_name[0] == '-')
1636                        {
1637                            ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1638                            prop_setter_name = prop_setter_method.GetSelector().GetCString();
1639                        }
1640
1641                        // If the names haven't been provided, they need to be
1642                        // filled in.
1643
1644                        if (!prop_getter_name)
1645                        {
1646                            prop_getter_name = prop_name;
1647                        }
1648                        if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1649                        {
1650                            StreamString ss;
1651
1652                            ss.Printf("set%c%s:",
1653                                      toupper(prop_name[0]),
1654                                      &prop_name[1]);
1655
1656                            fixed_setter.SetCString(ss.GetData());
1657                            prop_setter_name = fixed_setter.GetCString();
1658                        }
1659                    }
1660
1661                    // Clang has a DWARF generation bug where sometimes it
1662                    // represents fields that are references with bad byte size
1663                    // and bit size/offset information such as:
1664                    //
1665                    //  DW_AT_byte_size( 0x00 )
1666                    //  DW_AT_bit_size( 0x40 )
1667                    //  DW_AT_bit_offset( 0xffffffffffffffc0 )
1668                    //
1669                    // So check the bit offset to make sure it is sane, and if
1670                    // the values are not sane, remove them. If we don't do this
1671                    // then we will end up with a crash if we try to use this
1672                    // type in an expression when clang becomes unhappy with its
1673                    // recycled debug info.
1674
1675                    if (bit_offset > 128)
1676                    {
1677                        bit_size = 0;
1678                        bit_offset = 0;
1679                    }
1680
1681                    // FIXME: Make Clang ignore Objective-C accessibility for expressions
1682                    if (class_language == eLanguageTypeObjC ||
1683                        class_language == eLanguageTypeObjC_plus_plus)
1684                        accessibility = eAccessNone;
1685
1686                    if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
1687                    {
1688                        // Not all compilers will mark the vtable pointer
1689                        // member as artificial (llvm-gcc). We can't have
1690                        // the virtual members in our classes otherwise it
1691                        // throws off all child offsets since we end up
1692                        // having and extra pointer sized member in our
1693                        // class layouts.
1694                        is_artificial = true;
1695                    }
1696
1697                    // Skip static members
1698                    if (is_external && member_byte_offset == UINT32_MAX)
1699                    {
1700                        Type *var_type = ResolveTypeUID(encoding_uid);
1701
1702                        if (var_type)
1703                        {
1704                            GetClangASTContext().AddVariableToRecordType (class_clang_type,
1705                                                                          name,
1706                                                                          var_type->GetClangLayoutType(),
1707                                                                          accessibility);
1708                        }
1709                        break;
1710                    }
1711
1712                    if (is_artificial == false)
1713                    {
1714                        Type *member_type = ResolveTypeUID(encoding_uid);
1715
1716                        clang::FieldDecl *field_decl = NULL;
1717                        if (tag == DW_TAG_member)
1718                        {
1719                            if (member_type)
1720                            {
1721                                if (accessibility == eAccessNone)
1722                                    accessibility = default_accessibility;
1723                                member_accessibilities.push_back(accessibility);
1724
1725                                BitfieldInfo this_field_info;
1726
1727                                this_field_info.bit_size = bit_size;
1728
1729                                if (member_byte_offset != UINT32_MAX || bit_size != 0)
1730                                {
1731                                    /////////////////////////////////////////////////////////////
1732                                    // How to locate a field given the DWARF debug information
1733                                    //
1734                                    // AT_byte_size indicates the size of the word in which the
1735                                    // bit offset must be interpreted.
1736                                    //
1737                                    // AT_data_member_location indicates the byte offset of the
1738                                    // word from the base address of the structure.
1739                                    //
1740                                    // AT_bit_offset indicates how many bits into the word
1741                                    // (according to the host endianness) the low-order bit of
1742                                    // the field starts.  AT_bit_offset can be negative.
1743                                    //
1744                                    // AT_bit_size indicates the size of the field in bits.
1745                                    /////////////////////////////////////////////////////////////
1746
1747                                    this_field_info.bit_offset = 0;
1748
1749                                    this_field_info.bit_offset += (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
1750
1751                                    if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
1752                                    {
1753                                        this_field_info.bit_offset += byte_size * 8;
1754                                        this_field_info.bit_offset -= (bit_offset + bit_size);
1755                                    }
1756                                    else
1757                                    {
1758                                        this_field_info.bit_offset += bit_offset;
1759                                    }
1760                                }
1761
1762                                // If the member to be emitted did not start on a character boundary and there is
1763                                // empty space between the last field and this one, then we need to emit an
1764                                // anonymous member filling up the space up to its start.  There are three cases
1765                                // here:
1766                                //
1767                                // 1 If the previous member ended on a character boundary, then we can emit an
1768                                //   anonymous member starting at the most recent character boundary.
1769                                //
1770                                // 2 If the previous member did not end on a character boundary and the distance
1771                                //   from the end of the previous member to the current member is less than a
1772                                //   word width, then we can emit an anonymous member starting right after the
1773                                //   previous member and right before this member.
1774                                //
1775                                // 3 If the previous member did not end on a character boundary and the distance
1776                                //   from the end of the previous member to the current member is greater than
1777                                //   or equal a word width, then we act as in Case 1.
1778
1779                                const uint64_t character_width = 8;
1780                                const uint64_t word_width = 32;
1781
1782                                if (this_field_info.IsValid())
1783                                {
1784                                    // Objective-C has invalid DW_AT_bit_offset values in older versions
1785                                    // of clang, so we have to be careful and only insert unnammed bitfields
1786                                    // if we have a new enough clang.
1787                                    bool detect_unnamed_bitfields = true;
1788
1789                                    if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
1790                                        detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
1791
1792                                    if (detect_unnamed_bitfields)
1793                                    {
1794                                        BitfieldInfo anon_field_info;
1795
1796                                        if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
1797                                        {
1798                                            uint64_t last_field_end = 0;
1799
1800                                            if (last_field_info.IsValid())
1801                                                last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
1802
1803                                            if (this_field_info.bit_offset != last_field_end)
1804                                            {
1805                                                if (((last_field_end % character_width) == 0) ||                    // case 1
1806                                                    (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
1807                                                {
1808                                                    anon_field_info.bit_size = this_field_info.bit_offset % character_width;
1809                                                    anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
1810                                                }
1811                                                else                                                                // case 2
1812                                                {
1813                                                    anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
1814                                                    anon_field_info.bit_offset = last_field_end;
1815                                                }
1816                                            }
1817                                        }
1818
1819                                        if (anon_field_info.IsValid())
1820                                        {
1821                                            clang::FieldDecl *unnamed_bitfield_decl = GetClangASTContext().AddFieldToRecordType (class_clang_type,
1822                                                                                                                                 NULL,
1823                                                                                                                                 GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
1824                                                                                                                                 accessibility,
1825                                                                                                                                 anon_field_info.bit_size);
1826
1827                                            layout_info.field_offsets.insert(std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
1828                                        }
1829                                    }
1830                                }
1831
1832                                clang_type_t member_clang_type = member_type->GetClangLayoutType();
1833
1834                                {
1835                                    // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
1836                                    // If the current field is at the end of the structure, then there is definitely no room for extra
1837                                    // elements and we override the type to array[0].
1838
1839                                    clang_type_t member_array_element_type;
1840                                    uint64_t member_array_size;
1841                                    bool member_array_is_incomplete;
1842
1843                                    if (GetClangASTContext().IsArrayType(member_clang_type,
1844                                                                         &member_array_element_type,
1845                                                                         &member_array_size,
1846                                                                         &member_array_is_incomplete) &&
1847                                        !member_array_is_incomplete)
1848                                    {
1849                                        uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
1850
1851                                        if (member_byte_offset >= parent_byte_size)
1852                                        {
1853                                            if (member_array_size != 1)
1854                                            {
1855                                                GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64,
1856                                                                                           MakeUserID(die->GetOffset()),
1857                                                                                           name,
1858                                                                                           encoding_uid,
1859                                                                                           MakeUserID(parent_die->GetOffset()));
1860                                            }
1861
1862                                            member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
1863                                        }
1864                                    }
1865                                }
1866
1867                                field_decl = GetClangASTContext().AddFieldToRecordType (class_clang_type,
1868                                                                                        name,
1869                                                                                        member_clang_type,
1870                                                                                        accessibility,
1871                                                                                        bit_size);
1872
1873                                GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
1874
1875                                if (this_field_info.IsValid())
1876                                {
1877                                    layout_info.field_offsets.insert(std::make_pair(field_decl, this_field_info.bit_offset));
1878                                    last_field_info = this_field_info;
1879                                }
1880                            }
1881                            else
1882                            {
1883                                if (name)
1884                                    GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
1885                                                                               MakeUserID(die->GetOffset()),
1886                                                                               name,
1887                                                                               encoding_uid);
1888                                else
1889                                    GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
1890                                                                               MakeUserID(die->GetOffset()),
1891                                                                               encoding_uid);
1892                            }
1893                        }
1894
1895                        if (prop_name != NULL)
1896                        {
1897                            clang::ObjCIvarDecl *ivar_decl = NULL;
1898
1899                            if (field_decl)
1900                            {
1901                                ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
1902                                assert (ivar_decl != NULL);
1903                            }
1904
1905                            ClangASTMetadata metadata;
1906                            metadata.SetUserID (MakeUserID(die->GetOffset()));
1907                            delayed_properties.push_back(DelayedAddObjCClassProperty(GetClangASTContext().getASTContext(),
1908                                                                                     class_clang_type,
1909                                                                                     prop_name,
1910                                                                                     member_type->GetClangLayoutType(),
1911                                                                                     ivar_decl,
1912                                                                                     prop_setter_name,
1913                                                                                     prop_getter_name,
1914                                                                                     prop_attributes,
1915                                                                                     &metadata));
1916
1917                            if (ivar_decl)
1918                                GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
1919                        }
1920                    }
1921                }
1922                ++member_idx;
1923            }
1924            break;
1925
1926        case DW_TAG_subprogram:
1927            // Let the type parsing code handle this one for us.
1928            member_function_dies.Append (die);
1929            break;
1930
1931        case DW_TAG_inheritance:
1932            {
1933                is_a_class = true;
1934                if (default_accessibility == eAccessNone)
1935                    default_accessibility = eAccessPrivate;
1936                // TODO: implement DW_TAG_inheritance type parsing
1937                DWARFDebugInfoEntry::Attributes attributes;
1938                const size_t num_attributes = die->GetAttributes (this,
1939                                                                  dwarf_cu,
1940                                                                  fixed_form_sizes,
1941                                                                  attributes);
1942                if (num_attributes > 0)
1943                {
1944                    Declaration decl;
1945                    DWARFExpression location;
1946                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1947                    AccessType accessibility = default_accessibility;
1948                    bool is_virtual = false;
1949                    bool is_base_of_class = true;
1950                    off_t member_byte_offset = 0;
1951                    uint32_t i;
1952                    for (i=0; i<num_attributes; ++i)
1953                    {
1954                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
1955                        DWARFFormValue form_value;
1956                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1957                        {
1958                            switch (attr)
1959                            {
1960                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1961                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1962                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1963                            case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
1964                            case DW_AT_data_member_location:
1965                                if (form_value.BlockData())
1966                                {
1967                                    Value initialValue(0);
1968                                    Value memberOffset(0);
1969                                    const DataExtractor& debug_info_data = get_debug_info_data();
1970                                    uint32_t block_length = form_value.Unsigned();
1971                                    uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1972                                    if (DWARFExpression::Evaluate (NULL,
1973                                                                   NULL,
1974                                                                   NULL,
1975                                                                   NULL,
1976                                                                   NULL,
1977                                                                   debug_info_data,
1978                                                                   block_offset,
1979                                                                   block_length,
1980                                                                   eRegisterKindDWARF,
1981                                                                   &initialValue,
1982                                                                   memberOffset,
1983                                                                   NULL))
1984                                    {
1985                                        member_byte_offset = memberOffset.ResolveValue(NULL, NULL).UInt();
1986                                    }
1987                                }
1988                                break;
1989
1990                            case DW_AT_accessibility:
1991                                accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
1992                                break;
1993
1994                            case DW_AT_virtuality: is_virtual = form_value.Boolean(); break;
1995                            default:
1996                            case DW_AT_sibling:
1997                                break;
1998                            }
1999                        }
2000                    }
2001
2002                    Type *base_class_type = ResolveTypeUID(encoding_uid);
2003                    assert(base_class_type);
2004
2005                    clang_type_t base_class_clang_type = base_class_type->GetClangFullType();
2006                    assert (base_class_clang_type);
2007                    if (class_language == eLanguageTypeObjC)
2008                    {
2009                        GetClangASTContext().SetObjCSuperClass(class_clang_type, base_class_clang_type);
2010                    }
2011                    else
2012                    {
2013                        base_classes.push_back (GetClangASTContext().CreateBaseClassSpecifier (base_class_clang_type,
2014                                                                                               accessibility,
2015                                                                                               is_virtual,
2016                                                                                               is_base_of_class));
2017
2018                        if (is_virtual)
2019                        {
2020                            layout_info.vbase_offsets.insert(std::make_pair(ClangASTType::GetAsCXXRecordDecl(class_clang_type),
2021                                                                            clang::CharUnits::fromQuantity(member_byte_offset)));
2022                        }
2023                        else
2024                        {
2025                            layout_info.base_offsets.insert(std::make_pair(ClangASTType::GetAsCXXRecordDecl(class_clang_type),
2026                                                                           clang::CharUnits::fromQuantity(member_byte_offset)));
2027                        }
2028                    }
2029                }
2030            }
2031            break;
2032
2033        default:
2034            break;
2035        }
2036    }
2037
2038    return count;
2039}
2040
2041
2042clang::DeclContext*
2043SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2044{
2045    DWARFDebugInfo* debug_info = DebugInfo();
2046    if (debug_info && UserIDMatches(type_uid))
2047    {
2048        DWARFCompileUnitSP cu_sp;
2049        const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2050        if (die)
2051            return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2052    }
2053    return NULL;
2054}
2055
2056clang::DeclContext*
2057SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2058{
2059    if (UserIDMatches(type_uid))
2060        return GetClangDeclContextForDIEOffset (sc, type_uid);
2061    return NULL;
2062}
2063
2064Type*
2065SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2066{
2067    if (UserIDMatches(type_uid))
2068    {
2069        DWARFDebugInfo* debug_info = DebugInfo();
2070        if (debug_info)
2071        {
2072            DWARFCompileUnitSP cu_sp;
2073            const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2074            const bool assert_not_being_parsed = true;
2075            return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2076        }
2077    }
2078    return NULL;
2079}
2080
2081Type*
2082SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2083{
2084    if (die != NULL)
2085    {
2086        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2087        if (log)
2088            GetObjectFile()->GetModule()->LogMessage (log,
2089                                                      "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2090                                                      die->GetOffset(),
2091                                                      DW_TAG_value_to_name(die->Tag()),
2092                                                      die->GetName(this, cu));
2093
2094        // We might be coming in in the middle of a type tree (a class
2095        // withing a class, an enum within a class), so parse any needed
2096        // parent DIEs before we get to this one...
2097        const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2098        switch (decl_ctx_die->Tag())
2099        {
2100            case DW_TAG_structure_type:
2101            case DW_TAG_union_type:
2102            case DW_TAG_class_type:
2103            {
2104                // Get the type, which could be a forward declaration
2105                if (log)
2106                    GetObjectFile()->GetModule()->LogMessage (log,
2107                                                              "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2108                                                              die->GetOffset(),
2109                                                              DW_TAG_value_to_name(die->Tag()),
2110                                                              die->GetName(this, cu),
2111                                                              decl_ctx_die->GetOffset());
2112//
2113//                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2114//                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2115//                {
2116//                    if (log)
2117//                        GetObjectFile()->GetModule()->LogMessage (log,
2118//                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2119//                                                                  die->GetOffset(),
2120//                                                                  DW_TAG_value_to_name(die->Tag()),
2121//                                                                  die->GetName(this, cu),
2122//                                                                  decl_ctx_die->GetOffset());
2123//                    // Ask the type to complete itself if it already hasn't since if we
2124//                    // want a function (method or static) from a class, the class must
2125//                    // create itself and add it's own methods and class functions.
2126//                    if (parent_type)
2127//                        parent_type->GetClangFullType();
2128//                }
2129            }
2130            break;
2131
2132            default:
2133                break;
2134        }
2135        return ResolveType (cu, die);
2136    }
2137    return NULL;
2138}
2139
2140// This function is used when SymbolFileDWARFDebugMap owns a bunch of
2141// SymbolFileDWARF objects to detect if this DWARF file is the one that
2142// can resolve a clang_type.
2143bool
2144SymbolFileDWARF::HasForwardDeclForClangType (lldb::clang_type_t clang_type)
2145{
2146    clang_type_t clang_type_no_qualifiers = ClangASTType::RemoveFastQualifiers(clang_type);
2147    const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers);
2148    return die != NULL;
2149}
2150
2151
2152lldb::clang_type_t
2153SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (lldb::clang_type_t clang_type)
2154{
2155    // We have a struct/union/class/enum that needs to be fully resolved.
2156    clang_type_t clang_type_no_qualifiers = ClangASTType::RemoveFastQualifiers(clang_type);
2157    const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers);
2158    if (die == NULL)
2159    {
2160        // We have already resolved this type...
2161        return clang_type;
2162    }
2163    // Once we start resolving this type, remove it from the forward declaration
2164    // map in case anyone child members or other types require this type to get resolved.
2165    // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2166    // are done.
2167    m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers);
2168
2169
2170    // Disable external storage for this type so we don't get anymore
2171    // clang::ExternalASTSource queries for this type.
2172    ClangASTContext::SetHasExternalStorage (clang_type, false);
2173
2174    DWARFDebugInfo* debug_info = DebugInfo();
2175
2176    DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2177    Type *type = m_die_to_type.lookup (die);
2178
2179    const dw_tag_t tag = die->Tag();
2180
2181    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2182    if (log)
2183    {
2184        GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2185                                                                  "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2186                                                                  MakeUserID(die->GetOffset()),
2187                                                                  DW_TAG_value_to_name(tag),
2188                                                                  type->GetName().AsCString());
2189
2190    }
2191    assert (clang_type);
2192    DWARFDebugInfoEntry::Attributes attributes;
2193
2194    ClangASTContext &ast = GetClangASTContext();
2195
2196    switch (tag)
2197    {
2198    case DW_TAG_structure_type:
2199    case DW_TAG_union_type:
2200    case DW_TAG_class_type:
2201        {
2202            LayoutInfo layout_info;
2203
2204            {
2205                if (die->HasChildren())
2206                {
2207
2208                    LanguageType class_language = eLanguageTypeUnknown;
2209                    bool is_objc_class = ClangASTContext::IsObjCClassType (clang_type);
2210                    if (is_objc_class)
2211                    {
2212                        class_language = eLanguageTypeObjC;
2213                        // For objective C we don't start the definition when
2214                        // the class is created.
2215                        ast.StartTagDeclarationDefinition (clang_type);
2216                    }
2217
2218                    int tag_decl_kind = -1;
2219                    AccessType default_accessibility = eAccessNone;
2220                    if (tag == DW_TAG_structure_type)
2221                    {
2222                        tag_decl_kind = clang::TTK_Struct;
2223                        default_accessibility = eAccessPublic;
2224                    }
2225                    else if (tag == DW_TAG_union_type)
2226                    {
2227                        tag_decl_kind = clang::TTK_Union;
2228                        default_accessibility = eAccessPublic;
2229                    }
2230                    else if (tag == DW_TAG_class_type)
2231                    {
2232                        tag_decl_kind = clang::TTK_Class;
2233                        default_accessibility = eAccessPrivate;
2234                    }
2235
2236                    SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2237                    std::vector<clang::CXXBaseSpecifier *> base_classes;
2238                    std::vector<int> member_accessibilities;
2239                    bool is_a_class = false;
2240                    // Parse members and base classes first
2241                    DWARFDIECollection member_function_dies;
2242
2243                    DelayedPropertyList delayed_properties;
2244                    ParseChildMembers (sc,
2245                                       dwarf_cu,
2246                                       die,
2247                                       clang_type,
2248                                       class_language,
2249                                       base_classes,
2250                                       member_accessibilities,
2251                                       member_function_dies,
2252                                       delayed_properties,
2253                                       default_accessibility,
2254                                       is_a_class,
2255                                       layout_info);
2256
2257                    // Now parse any methods if there were any...
2258                    size_t num_functions = member_function_dies.Size();
2259                    if (num_functions > 0)
2260                    {
2261                        for (size_t i=0; i<num_functions; ++i)
2262                        {
2263                            ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2264                        }
2265                    }
2266
2267                    if (class_language == eLanguageTypeObjC)
2268                    {
2269                        std::string class_str (ClangASTType::GetTypeNameForOpaqueQualType(ast.getASTContext(), clang_type));
2270                        if (!class_str.empty())
2271                        {
2272
2273                            DIEArray method_die_offsets;
2274                            if (m_using_apple_tables)
2275                            {
2276                                if (m_apple_objc_ap.get())
2277                                    m_apple_objc_ap->FindByName(class_str.c_str(), method_die_offsets);
2278                            }
2279                            else
2280                            {
2281                                if (!m_indexed)
2282                                    Index ();
2283
2284                                ConstString class_name (class_str.c_str());
2285                                m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2286                            }
2287
2288                            if (!method_die_offsets.empty())
2289                            {
2290                                DWARFDebugInfo* debug_info = DebugInfo();
2291
2292                                DWARFCompileUnit* method_cu = NULL;
2293                                const size_t num_matches = method_die_offsets.size();
2294                                for (size_t i=0; i<num_matches; ++i)
2295                                {
2296                                    const dw_offset_t die_offset = method_die_offsets[i];
2297                                    DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2298
2299                                    if (method_die)
2300                                        ResolveType (method_cu, method_die);
2301                                    else
2302                                    {
2303                                        if (m_using_apple_tables)
2304                                        {
2305                                            GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2306                                                                                                       die_offset, class_str.c_str());
2307                                        }
2308                                    }
2309                                }
2310                            }
2311
2312                            for (DelayedPropertyList::const_iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2313                                 pi != pe;
2314                                 ++pi)
2315                                pi->Finalize();
2316                        }
2317                    }
2318
2319                    // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2320                    // need to tell the clang type it is actually a class.
2321                    if (class_language != eLanguageTypeObjC)
2322                    {
2323                        if (is_a_class && tag_decl_kind != clang::TTK_Class)
2324                            ast.SetTagTypeKind (clang_type, clang::TTK_Class);
2325                    }
2326
2327                    // Since DW_TAG_structure_type gets used for both classes
2328                    // and structures, we may need to set any DW_TAG_member
2329                    // fields to have a "private" access if none was specified.
2330                    // When we parsed the child members we tracked that actual
2331                    // accessibility value for each DW_TAG_member in the
2332                    // "member_accessibilities" array. If the value for the
2333                    // member is zero, then it was set to the "default_accessibility"
2334                    // which for structs was "public". Below we correct this
2335                    // by setting any fields to "private" that weren't correctly
2336                    // set.
2337                    if (is_a_class && !member_accessibilities.empty())
2338                    {
2339                        // This is a class and all members that didn't have
2340                        // their access specified are private.
2341                        ast.SetDefaultAccessForRecordFields (clang_type,
2342                                                             eAccessPrivate,
2343                                                             &member_accessibilities.front(),
2344                                                             member_accessibilities.size());
2345                    }
2346
2347                    if (!base_classes.empty())
2348                    {
2349                        ast.SetBaseClassesForClassType (clang_type,
2350                                                        &base_classes.front(),
2351                                                        base_classes.size());
2352
2353                        // Clang will copy each CXXBaseSpecifier in "base_classes"
2354                        // so we have to free them all.
2355                        ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(),
2356                                                                    base_classes.size());
2357                    }
2358                }
2359            }
2360
2361            ast.BuildIndirectFields (clang_type);
2362
2363            ast.CompleteTagDeclarationDefinition (clang_type);
2364
2365            if (!layout_info.field_offsets.empty() ||
2366                !layout_info.base_offsets.empty()  ||
2367                !layout_info.vbase_offsets.empty() )
2368            {
2369                if (type)
2370                    layout_info.bit_size = type->GetByteSize() * 8;
2371                if (layout_info.bit_size == 0)
2372                    layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2373
2374                clang::CXXRecordDecl *record_decl = ClangASTType::GetAsCXXRecordDecl(clang_type);
2375                if (record_decl)
2376                {
2377                    if (log)
2378                    {
2379                        GetObjectFile()->GetModule()->LogMessage (log,
2380                                                                  "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2381                                                                  clang_type,
2382                                                                  record_decl,
2383                                                                  layout_info.bit_size,
2384                                                                  layout_info.alignment,
2385                                                                  (uint32_t)layout_info.field_offsets.size(),
2386                                                                  (uint32_t)layout_info.base_offsets.size(),
2387                                                                  (uint32_t)layout_info.vbase_offsets.size());
2388
2389                        uint32_t idx;
2390                        {
2391                        llvm::DenseMap <const clang::FieldDecl *, uint64_t>::const_iterator pos, end = layout_info.field_offsets.end();
2392                        for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2393                        {
2394                            GetObjectFile()->GetModule()->LogMessage (log,
2395                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }",
2396                                                                      clang_type,
2397                                                                      idx,
2398                                                                      (uint32_t)pos->second,
2399                                                                      pos->first->getNameAsString().c_str());
2400                        }
2401                        }
2402
2403                        {
2404                        llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, base_end = layout_info.base_offsets.end();
2405                        for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx)
2406                        {
2407                            GetObjectFile()->GetModule()->LogMessage (log,
2408                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }",
2409                                                                      clang_type,
2410                                                                      idx,
2411                                                                      (uint32_t)base_pos->second.getQuantity(),
2412                                                                      base_pos->first->getNameAsString().c_str());
2413                        }
2414                        }
2415                        {
2416                        llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, vbase_end = layout_info.vbase_offsets.end();
2417                        for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx)
2418                        {
2419                            GetObjectFile()->GetModule()->LogMessage (log,
2420                                                                      "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }",
2421                                                                      clang_type,
2422                                                                      idx,
2423                                                                      (uint32_t)vbase_pos->second.getQuantity(),
2424                                                                      vbase_pos->first->getNameAsString().c_str());
2425                        }
2426                        }
2427                    }
2428                    m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2429                }
2430            }
2431        }
2432
2433        return clang_type;
2434
2435    case DW_TAG_enumeration_type:
2436        ast.StartTagDeclarationDefinition (clang_type);
2437        if (die->HasChildren())
2438        {
2439            SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2440            bool is_signed = false;
2441            ast.IsIntegerType(clang_type, is_signed);
2442            ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2443        }
2444        ast.CompleteTagDeclarationDefinition (clang_type);
2445        return clang_type;
2446
2447    default:
2448        assert(false && "not a forward clang type decl!");
2449        break;
2450    }
2451    return NULL;
2452}
2453
2454Type*
2455SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2456{
2457    if (type_die != NULL)
2458    {
2459        Type *type = m_die_to_type.lookup (type_die);
2460
2461        if (type == NULL)
2462            type = GetTypeForDIE (dwarf_cu, type_die).get();
2463
2464        if (assert_not_being_parsed)
2465        {
2466            if (type != DIE_IS_BEING_PARSED)
2467                return type;
2468
2469            GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2470                                                       type_die->GetOffset(),
2471                                                       DW_TAG_value_to_name(type_die->Tag()),
2472                                                       type_die->GetName(this, dwarf_cu));
2473
2474        }
2475        else
2476            return type;
2477    }
2478    return NULL;
2479}
2480
2481CompileUnit*
2482SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2483{
2484    // Check if the symbol vendor already knows about this compile unit?
2485    if (dwarf_cu->GetUserData() == NULL)
2486    {
2487        // The symbol vendor doesn't know about this compile unit, we
2488        // need to parse and add it to the symbol vendor object.
2489        return ParseCompileUnit(dwarf_cu, cu_idx).get();
2490    }
2491    return (CompileUnit*)dwarf_cu->GetUserData();
2492}
2493
2494bool
2495SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2496{
2497    sc.Clear(false);
2498    // Check if the symbol vendor already knows about this compile unit?
2499    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2500
2501    sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2502    if (sc.function == NULL)
2503        sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2504
2505    if (sc.function)
2506    {
2507        sc.module_sp = sc.function->CalculateSymbolContextModule();
2508        return true;
2509    }
2510
2511    return false;
2512}
2513
2514uint32_t
2515SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2516{
2517    Timer scoped_timer(__PRETTY_FUNCTION__,
2518                       "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2519                       so_addr.GetSection().get(),
2520                       so_addr.GetOffset(),
2521                       resolve_scope);
2522    uint32_t resolved = 0;
2523    if (resolve_scope & (   eSymbolContextCompUnit |
2524                            eSymbolContextFunction |
2525                            eSymbolContextBlock |
2526                            eSymbolContextLineEntry))
2527    {
2528        lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2529
2530        DWARFDebugInfo* debug_info = DebugInfo();
2531        if (debug_info)
2532        {
2533            const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2534            if (cu_offset != DW_INVALID_OFFSET)
2535            {
2536                uint32_t cu_idx = DW_INVALID_INDEX;
2537                DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
2538                if (dwarf_cu)
2539                {
2540                    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2541                    if (sc.comp_unit)
2542                    {
2543                        resolved |= eSymbolContextCompUnit;
2544
2545                        bool force_check_line_table = false;
2546                        if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2547                        {
2548                            DWARFDebugInfoEntry *function_die = NULL;
2549                            DWARFDebugInfoEntry *block_die = NULL;
2550                            if (resolve_scope & eSymbolContextBlock)
2551                            {
2552                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
2553                            }
2554                            else
2555                            {
2556                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
2557                            }
2558
2559                            if (function_die != NULL)
2560                            {
2561                                sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2562                                if (sc.function == NULL)
2563                                    sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2564                            }
2565                            else
2566                            {
2567                                // We might have had a compile unit that had discontiguous
2568                                // address ranges where the gaps are symbols that don't have
2569                                // any debug info. Discontiguous compile unit address ranges
2570                                // should only happen when there aren't other functions from
2571                                // other compile units in these gaps. This helps keep the size
2572                                // of the aranges down.
2573                                force_check_line_table = true;
2574                            }
2575
2576                            if (sc.function != NULL)
2577                            {
2578                                resolved |= eSymbolContextFunction;
2579
2580                                if (resolve_scope & eSymbolContextBlock)
2581                                {
2582                                    Block& block = sc.function->GetBlock (true);
2583
2584                                    if (block_die != NULL)
2585                                        sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2586                                    else
2587                                        sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2588                                    if (sc.block)
2589                                        resolved |= eSymbolContextBlock;
2590                                }
2591                            }
2592                        }
2593
2594                        if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
2595                        {
2596                            LineTable *line_table = sc.comp_unit->GetLineTable();
2597                            if (line_table != NULL)
2598                            {
2599                                // And address that makes it into this function should be in terms
2600                                // of this debug file if there is no debug map, or it will be an
2601                                // address in the .o file which needs to be fixed up to be in terms
2602                                // of the debug map executable. Either way, calling FixupAddress()
2603                                // will work for us.
2604                                Address exe_so_addr (so_addr);
2605                                if (FixupAddress(exe_so_addr))
2606                                {
2607                                    if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
2608                                    {
2609                                        resolved |= eSymbolContextLineEntry;
2610                                    }
2611                                }
2612                            }
2613                        }
2614
2615                        if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
2616                        {
2617                            // We might have had a compile unit that had discontiguous
2618                            // address ranges where the gaps are symbols that don't have
2619                            // any debug info. Discontiguous compile unit address ranges
2620                            // should only happen when there aren't other functions from
2621                            // other compile units in these gaps. This helps keep the size
2622                            // of the aranges down.
2623                            sc.comp_unit = NULL;
2624                            resolved &= ~eSymbolContextCompUnit;
2625                        }
2626                    }
2627                    else
2628                    {
2629                        GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
2630                                                                     cu_offset,
2631                                                                     cu_idx);
2632                    }
2633                }
2634            }
2635        }
2636    }
2637    return resolved;
2638}
2639
2640
2641
2642uint32_t
2643SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
2644{
2645    const uint32_t prev_size = sc_list.GetSize();
2646    if (resolve_scope & eSymbolContextCompUnit)
2647    {
2648        DWARFDebugInfo* debug_info = DebugInfo();
2649        if (debug_info)
2650        {
2651            uint32_t cu_idx;
2652            DWARFCompileUnit* dwarf_cu = NULL;
2653
2654            for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
2655            {
2656                CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2657                const bool full_match = file_spec.GetDirectory();
2658                bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
2659                if (check_inlines || file_spec_matches_cu_file_spec)
2660                {
2661                    SymbolContext sc (m_obj_file->GetModule());
2662                    sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2663                    if (sc.comp_unit)
2664                    {
2665                        uint32_t file_idx = UINT32_MAX;
2666
2667                        // If we are looking for inline functions only and we don't
2668                        // find it in the support files, we are done.
2669                        if (check_inlines)
2670                        {
2671                            file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2672                            if (file_idx == UINT32_MAX)
2673                                continue;
2674                        }
2675
2676                        if (line != 0)
2677                        {
2678                            LineTable *line_table = sc.comp_unit->GetLineTable();
2679
2680                            if (line_table != NULL && line != 0)
2681                            {
2682                                // We will have already looked up the file index if
2683                                // we are searching for inline entries.
2684                                if (!check_inlines)
2685                                    file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2686
2687                                if (file_idx != UINT32_MAX)
2688                                {
2689                                    uint32_t found_line;
2690                                    uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
2691                                    found_line = sc.line_entry.line;
2692
2693                                    while (line_idx != UINT32_MAX)
2694                                    {
2695                                        sc.function = NULL;
2696                                        sc.block = NULL;
2697                                        if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2698                                        {
2699                                            const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
2700                                            if (file_vm_addr != LLDB_INVALID_ADDRESS)
2701                                            {
2702                                                DWARFDebugInfoEntry *function_die = NULL;
2703                                                DWARFDebugInfoEntry *block_die = NULL;
2704                                                dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
2705
2706                                                if (function_die != NULL)
2707                                                {
2708                                                    sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2709                                                    if (sc.function == NULL)
2710                                                        sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2711                                                }
2712
2713                                                if (sc.function != NULL)
2714                                                {
2715                                                    Block& block = sc.function->GetBlock (true);
2716
2717                                                    if (block_die != NULL)
2718                                                        sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2719                                                    else
2720                                                        sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2721                                                }
2722                                            }
2723                                        }
2724
2725                                        sc_list.Append(sc);
2726                                        line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
2727                                    }
2728                                }
2729                            }
2730                            else if (file_spec_matches_cu_file_spec && !check_inlines)
2731                            {
2732                                // only append the context if we aren't looking for inline call sites
2733                                // by file and line and if the file spec matches that of the compile unit
2734                                sc_list.Append(sc);
2735                            }
2736                        }
2737                        else if (file_spec_matches_cu_file_spec && !check_inlines)
2738                        {
2739                            // only append the context if we aren't looking for inline call sites
2740                            // by file and line and if the file spec matches that of the compile unit
2741                            sc_list.Append(sc);
2742                        }
2743
2744                        if (!check_inlines)
2745                            break;
2746                    }
2747                }
2748            }
2749        }
2750    }
2751    return sc_list.GetSize() - prev_size;
2752}
2753
2754void
2755SymbolFileDWARF::Index ()
2756{
2757    if (m_indexed)
2758        return;
2759    m_indexed = true;
2760    Timer scoped_timer (__PRETTY_FUNCTION__,
2761                        "SymbolFileDWARF::Index (%s)",
2762                        GetObjectFile()->GetFileSpec().GetFilename().AsCString());
2763
2764    DWARFDebugInfo* debug_info = DebugInfo();
2765    if (debug_info)
2766    {
2767        uint32_t cu_idx = 0;
2768        const uint32_t num_compile_units = GetNumCompileUnits();
2769        for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
2770        {
2771            DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2772
2773            bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
2774
2775            dwarf_cu->Index (cu_idx,
2776                             m_function_basename_index,
2777                             m_function_fullname_index,
2778                             m_function_method_index,
2779                             m_function_selector_index,
2780                             m_objc_class_selectors_index,
2781                             m_global_index,
2782                             m_type_index,
2783                             m_namespace_index);
2784
2785            // Keep memory down by clearing DIEs if this generate function
2786            // caused them to be parsed
2787            if (clear_dies)
2788                dwarf_cu->ClearDIEs (true);
2789        }
2790
2791        m_function_basename_index.Finalize();
2792        m_function_fullname_index.Finalize();
2793        m_function_method_index.Finalize();
2794        m_function_selector_index.Finalize();
2795        m_objc_class_selectors_index.Finalize();
2796        m_global_index.Finalize();
2797        m_type_index.Finalize();
2798        m_namespace_index.Finalize();
2799
2800#if defined (ENABLE_DEBUG_PRINTF)
2801        StreamFile s(stdout, false);
2802        s.Printf ("DWARF index for '%s':",
2803                  GetObjectFile()->GetFileSpec().GetPath().c_str());
2804        s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
2805        s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
2806        s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
2807        s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
2808        s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
2809        s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
2810        s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
2811        s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
2812#endif
2813    }
2814}
2815
2816bool
2817SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
2818{
2819    if (namespace_decl == NULL)
2820    {
2821        // Invalid namespace decl which means we aren't matching only things
2822        // in this symbol file, so return true to indicate it matches this
2823        // symbol file.
2824        return true;
2825    }
2826
2827    clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
2828
2829    if (namespace_ast == NULL)
2830        return true;    // No AST in the "namespace_decl", return true since it
2831                        // could then match any symbol file, including this one
2832
2833    if (namespace_ast == GetClangASTContext().getASTContext())
2834        return true;    // The ASTs match, return true
2835
2836    // The namespace AST was valid, and it does not match...
2837    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2838
2839    if (log)
2840        GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
2841
2842    return false;
2843}
2844
2845bool
2846SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
2847                                   DWARFCompileUnit* cu,
2848                                   const DWARFDebugInfoEntry* die)
2849{
2850    // No namespace specified, so the answesr i
2851    if (namespace_decl == NULL)
2852        return true;
2853
2854    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2855
2856    const DWARFDebugInfoEntry *decl_ctx_die = NULL;
2857    clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
2858    if (decl_ctx_die)
2859    {
2860        clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
2861
2862        if (clang_namespace_decl)
2863        {
2864            if (decl_ctx_die->Tag() != DW_TAG_namespace)
2865            {
2866                if (log)
2867                    GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
2868                return false;
2869            }
2870
2871            if (clang_namespace_decl == die_clang_decl_ctx)
2872                return true;
2873            else
2874                return false;
2875        }
2876        else
2877        {
2878            // We have a namespace_decl that was not NULL but it contained
2879            // a NULL "clang::NamespaceDecl", so this means the global namespace
2880            // So as long the the contained decl context DIE isn't a namespace
2881            // we should be ok.
2882            if (decl_ctx_die->Tag() != DW_TAG_namespace)
2883                return true;
2884        }
2885    }
2886
2887    if (log)
2888        GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
2889
2890    return false;
2891}
2892uint32_t
2893SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
2894{
2895    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2896
2897    if (log)
2898    {
2899        GetObjectFile()->GetModule()->LogMessage (log,
2900                                                  "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
2901                                                  name.GetCString(),
2902                                                  namespace_decl,
2903                                                  append,
2904                                                  max_matches);
2905    }
2906
2907    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
2908		return 0;
2909
2910    DWARFDebugInfo* info = DebugInfo();
2911    if (info == NULL)
2912        return 0;
2913
2914    // If we aren't appending the results to this list, then clear the list
2915    if (!append)
2916        variables.Clear();
2917
2918    // Remember how many variables are in the list before we search in case
2919    // we are appending the results to a variable list.
2920    const uint32_t original_size = variables.GetSize();
2921
2922    DIEArray die_offsets;
2923
2924    if (m_using_apple_tables)
2925    {
2926        if (m_apple_names_ap.get())
2927        {
2928            const char *name_cstr = name.GetCString();
2929            const char *base_name_start;
2930            const char *base_name_end = NULL;
2931
2932            if (!CPPLanguageRuntime::StripNamespacesFromVariableName(name_cstr, base_name_start, base_name_end))
2933                base_name_start = name_cstr;
2934
2935            m_apple_names_ap->FindByName (base_name_start, die_offsets);
2936        }
2937    }
2938    else
2939    {
2940        // Index the DWARF if we haven't already
2941        if (!m_indexed)
2942            Index ();
2943
2944        m_global_index.Find (name, die_offsets);
2945    }
2946
2947    const size_t num_die_matches = die_offsets.size();
2948    if (num_die_matches)
2949    {
2950        SymbolContext sc;
2951        sc.module_sp = m_obj_file->GetModule();
2952        assert (sc.module_sp);
2953
2954        DWARFDebugInfo* debug_info = DebugInfo();
2955        DWARFCompileUnit* dwarf_cu = NULL;
2956        const DWARFDebugInfoEntry* die = NULL;
2957        bool done = false;
2958        for (size_t i=0; i<num_die_matches && !done; ++i)
2959        {
2960            const dw_offset_t die_offset = die_offsets[i];
2961            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
2962
2963            if (die)
2964            {
2965                switch (die->Tag())
2966                {
2967                    default:
2968                    case DW_TAG_subprogram:
2969                    case DW_TAG_inlined_subroutine:
2970                    case DW_TAG_try_block:
2971                    case DW_TAG_catch_block:
2972                        break;
2973
2974                    case DW_TAG_variable:
2975                        {
2976                            sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2977
2978                            if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
2979                                continue;
2980
2981                            ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
2982
2983                            if (variables.GetSize() - original_size >= max_matches)
2984                                done = true;
2985                        }
2986                        break;
2987                }
2988            }
2989            else
2990            {
2991                if (m_using_apple_tables)
2992                {
2993                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
2994                                                                               die_offset, name.GetCString());
2995                }
2996            }
2997        }
2998    }
2999
3000    // Return the number of variable that were appended to the list
3001    const uint32_t num_matches = variables.GetSize() - original_size;
3002    if (log && num_matches > 0)
3003    {
3004        GetObjectFile()->GetModule()->LogMessage (log,
3005                                                  "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3006                                                  name.GetCString(),
3007                                                  namespace_decl,
3008                                                  append,
3009                                                  max_matches,
3010                                                  num_matches);
3011    }
3012    return num_matches;
3013}
3014
3015uint32_t
3016SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3017{
3018    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3019
3020    if (log)
3021    {
3022        GetObjectFile()->GetModule()->LogMessage (log,
3023                                                  "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3024                                                  regex.GetText(),
3025                                                  append,
3026                                                  max_matches);
3027    }
3028
3029    DWARFDebugInfo* info = DebugInfo();
3030    if (info == NULL)
3031        return 0;
3032
3033    // If we aren't appending the results to this list, then clear the list
3034    if (!append)
3035        variables.Clear();
3036
3037    // Remember how many variables are in the list before we search in case
3038    // we are appending the results to a variable list.
3039    const uint32_t original_size = variables.GetSize();
3040
3041    DIEArray die_offsets;
3042
3043    if (m_using_apple_tables)
3044    {
3045        if (m_apple_names_ap.get())
3046        {
3047            DWARFMappedHash::DIEInfoArray hash_data_array;
3048            if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3049                DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3050        }
3051    }
3052    else
3053    {
3054        // Index the DWARF if we haven't already
3055        if (!m_indexed)
3056            Index ();
3057
3058        m_global_index.Find (regex, die_offsets);
3059    }
3060
3061    SymbolContext sc;
3062    sc.module_sp = m_obj_file->GetModule();
3063    assert (sc.module_sp);
3064
3065    DWARFCompileUnit* dwarf_cu = NULL;
3066    const DWARFDebugInfoEntry* die = NULL;
3067    const size_t num_matches = die_offsets.size();
3068    if (num_matches)
3069    {
3070        DWARFDebugInfo* debug_info = DebugInfo();
3071        for (size_t i=0; i<num_matches; ++i)
3072        {
3073            const dw_offset_t die_offset = die_offsets[i];
3074            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3075
3076            if (die)
3077            {
3078                sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3079
3080                ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3081
3082                if (variables.GetSize() - original_size >= max_matches)
3083                    break;
3084            }
3085            else
3086            {
3087                if (m_using_apple_tables)
3088                {
3089                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3090                                                                               die_offset, regex.GetText());
3091                }
3092            }
3093        }
3094    }
3095
3096    // Return the number of variable that were appended to the list
3097    return variables.GetSize() - original_size;
3098}
3099
3100
3101bool
3102SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3103                                  DWARFCompileUnit *&dwarf_cu,
3104                                  SymbolContextList& sc_list)
3105{
3106    const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3107    return ResolveFunction (dwarf_cu, die, sc_list);
3108}
3109
3110
3111bool
3112SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3113                                  const DWARFDebugInfoEntry *die,
3114                                  SymbolContextList& sc_list)
3115{
3116    SymbolContext sc;
3117
3118    if (die == NULL)
3119        return false;
3120
3121    // If we were passed a die that is not a function, just return false...
3122    if (die->Tag() != DW_TAG_subprogram && die->Tag() != DW_TAG_inlined_subroutine)
3123        return false;
3124
3125    const DWARFDebugInfoEntry* inlined_die = NULL;
3126    if (die->Tag() == DW_TAG_inlined_subroutine)
3127    {
3128        inlined_die = die;
3129
3130        while ((die = die->GetParent()) != NULL)
3131        {
3132            if (die->Tag() == DW_TAG_subprogram)
3133                break;
3134        }
3135    }
3136    assert (die->Tag() == DW_TAG_subprogram);
3137    if (GetFunction (cu, die, sc))
3138    {
3139        Address addr;
3140        // Parse all blocks if needed
3141        if (inlined_die)
3142        {
3143            sc.block = sc.function->GetBlock (true).FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3144            assert (sc.block != NULL);
3145            if (sc.block->GetStartAddress (addr) == false)
3146                addr.Clear();
3147        }
3148        else
3149        {
3150            sc.block = NULL;
3151            addr = sc.function->GetAddressRange().GetBaseAddress();
3152        }
3153
3154        if (addr.IsValid())
3155        {
3156            sc_list.Append(sc);
3157            return true;
3158        }
3159    }
3160
3161    return false;
3162}
3163
3164void
3165SymbolFileDWARF::FindFunctions (const ConstString &name,
3166                                const NameToDIE &name_to_die,
3167                                SymbolContextList& sc_list)
3168{
3169    DIEArray die_offsets;
3170    if (name_to_die.Find (name, die_offsets))
3171    {
3172        ParseFunctions (die_offsets, sc_list);
3173    }
3174}
3175
3176
3177void
3178SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3179                                const NameToDIE &name_to_die,
3180                                SymbolContextList& sc_list)
3181{
3182    DIEArray die_offsets;
3183    if (name_to_die.Find (regex, die_offsets))
3184    {
3185        ParseFunctions (die_offsets, sc_list);
3186    }
3187}
3188
3189
3190void
3191SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3192                                const DWARFMappedHash::MemoryTable &memory_table,
3193                                SymbolContextList& sc_list)
3194{
3195    DIEArray die_offsets;
3196    DWARFMappedHash::DIEInfoArray hash_data_array;
3197    if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3198    {
3199        DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3200        ParseFunctions (die_offsets, sc_list);
3201    }
3202}
3203
3204void
3205SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3206                                 SymbolContextList& sc_list)
3207{
3208    const size_t num_matches = die_offsets.size();
3209    if (num_matches)
3210    {
3211        SymbolContext sc;
3212
3213        DWARFCompileUnit* dwarf_cu = NULL;
3214        for (size_t i=0; i<num_matches; ++i)
3215        {
3216            const dw_offset_t die_offset = die_offsets[i];
3217            ResolveFunction (die_offset, dwarf_cu, sc_list);
3218        }
3219    }
3220}
3221
3222bool
3223SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3224                                                const DWARFCompileUnit *dwarf_cu,
3225                                                uint32_t name_type_mask,
3226                                                const char *partial_name,
3227                                                const char *base_name_start,
3228                                                const char *base_name_end)
3229{
3230    // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3231    if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3232    {
3233        clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3234        if (!containing_decl_ctx)
3235            return false;
3236
3237        bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3238
3239        if (name_type_mask == eFunctionNameTypeMethod)
3240        {
3241            if (is_cxx_method == false)
3242                return false;
3243        }
3244
3245        if (name_type_mask == eFunctionNameTypeBase)
3246        {
3247            if (is_cxx_method == true)
3248                return false;
3249        }
3250    }
3251
3252    // Now we need to check whether the name we got back for this type matches the extra specifications
3253    // that were in the name we're looking up:
3254    if (base_name_start != partial_name || *base_name_end != '\0')
3255    {
3256        // First see if the stuff to the left matches the full name.  To do that let's see if
3257        // we can pull out the mips linkage name attribute:
3258
3259        Mangled best_name;
3260        DWARFDebugInfoEntry::Attributes attributes;
3261        DWARFFormValue form_value;
3262        die->GetAttributes(this, dwarf_cu, NULL, attributes);
3263        uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3264        if (idx == UINT32_MAX)
3265            idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3266        if (idx != UINT32_MAX)
3267        {
3268            if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3269            {
3270                const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3271                if (mangled_name)
3272                    best_name.SetValue (ConstString(mangled_name), true);
3273            }
3274        }
3275
3276        if (!best_name)
3277        {
3278            idx = attributes.FindAttributeIndex(DW_AT_name);
3279            if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3280            {
3281                const char *name = form_value.AsCString(&get_debug_str_data());
3282                best_name.SetValue (ConstString(name), false);
3283            }
3284        }
3285
3286        if (best_name.GetDemangledName())
3287        {
3288            const char *demangled = best_name.GetDemangledName().GetCString();
3289            if (demangled)
3290            {
3291                std::string name_no_parens(partial_name, base_name_end - partial_name);
3292                const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3293                if (partial_in_demangled == NULL)
3294                    return false;
3295                else
3296                {
3297                    // Sort out the case where our name is something like "Process::Destroy" and the match is
3298                    // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3299                    // namespace boundaries...
3300
3301                    if (partial_name[0] == ':'  && partial_name[1] == ':')
3302                    {
3303                        // The partial name was already on a namespace boundary so all matches are good.
3304                        return true;
3305                    }
3306                    else if (partial_in_demangled == demangled)
3307                    {
3308                        // They both start the same, so this is an good match.
3309                        return true;
3310                    }
3311                    else
3312                    {
3313                        if (partial_in_demangled - demangled == 1)
3314                        {
3315                            // Only one character difference, can't be a namespace boundary...
3316                            return false;
3317                        }
3318                        else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3319                        {
3320                            // We are on a namespace boundary, so this is also good.
3321                            return true;
3322                        }
3323                        else
3324                            return false;
3325                    }
3326                }
3327            }
3328        }
3329    }
3330
3331    return true;
3332}
3333
3334uint32_t
3335SymbolFileDWARF::FindFunctions (const ConstString &name,
3336                                const lldb_private::ClangNamespaceDecl *namespace_decl,
3337                                uint32_t name_type_mask,
3338                                bool include_inlines,
3339                                bool append,
3340                                SymbolContextList& sc_list)
3341{
3342    Timer scoped_timer (__PRETTY_FUNCTION__,
3343                        "SymbolFileDWARF::FindFunctions (name = '%s')",
3344                        name.AsCString());
3345
3346    // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3347    assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3348
3349    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3350
3351    if (log)
3352    {
3353        GetObjectFile()->GetModule()->LogMessage (log,
3354                                                  "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3355                                                  name.GetCString(),
3356                                                  name_type_mask,
3357                                                  append);
3358    }
3359
3360    // If we aren't appending the results to this list, then clear the list
3361    if (!append)
3362        sc_list.Clear();
3363
3364    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3365		return 0;
3366
3367    // If name is empty then we won't find anything.
3368    if (name.IsEmpty())
3369        return 0;
3370
3371    // Remember how many sc_list are in the list before we search in case
3372    // we are appending the results to a variable list.
3373
3374    const char *name_cstr = name.GetCString();
3375
3376    const uint32_t original_size = sc_list.GetSize();
3377
3378    DWARFDebugInfo* info = DebugInfo();
3379    if (info == NULL)
3380        return 0;
3381
3382    DWARFCompileUnit *dwarf_cu = NULL;
3383    std::set<const DWARFDebugInfoEntry *> resolved_dies;
3384    if (m_using_apple_tables)
3385    {
3386        if (m_apple_names_ap.get())
3387        {
3388
3389            DIEArray die_offsets;
3390
3391            uint32_t num_matches = 0;
3392
3393            if (name_type_mask & eFunctionNameTypeFull)
3394            {
3395                // If they asked for the full name, match what they typed.  At some point we may
3396                // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3397                // dies that we find by exact match.
3398                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3399                for (uint32_t i = 0; i < num_matches; i++)
3400                {
3401                    const dw_offset_t die_offset = die_offsets[i];
3402                    const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3403                    if (die)
3404                    {
3405                        if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3406                            continue;
3407
3408                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3409                            continue;
3410
3411                        if (resolved_dies.find(die) == resolved_dies.end())
3412                        {
3413                            if (ResolveFunction (dwarf_cu, die, sc_list))
3414                                resolved_dies.insert(die);
3415                        }
3416                    }
3417                    else
3418                    {
3419                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3420                                                                                   die_offset, name_cstr);
3421                    }
3422                }
3423            }
3424
3425            if (name_type_mask & eFunctionNameTypeSelector)
3426            {
3427                if (namespace_decl && *namespace_decl)
3428                    return 0; // no selectors in namespaces
3429
3430                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3431                // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3432                // and if it is an ObjC method name, we're good.
3433
3434                for (uint32_t i = 0; i < num_matches; i++)
3435                {
3436                    const dw_offset_t die_offset = die_offsets[i];
3437                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3438                    if (die)
3439                    {
3440                        const char *die_name = die->GetName(this, dwarf_cu);
3441                        if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3442                        {
3443                            if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3444                                continue;
3445
3446                            if (resolved_dies.find(die) == resolved_dies.end())
3447                            {
3448                                if (ResolveFunction (dwarf_cu, die, sc_list))
3449                                    resolved_dies.insert(die);
3450                            }
3451                        }
3452                    }
3453                    else
3454                    {
3455                        GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3456                                                                   die_offset, name_cstr);
3457                    }
3458                }
3459                die_offsets.clear();
3460            }
3461
3462            if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3463            {
3464                // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3465                // extract the base name, look that up, and if there is any other information in the name we were
3466                // passed in we have to post-filter based on that.
3467
3468                // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3469                num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3470
3471                for (uint32_t i = 0; i < num_matches; i++)
3472                {
3473                    const dw_offset_t die_offset = die_offsets[i];
3474                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3475                    if (die)
3476                    {
3477                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3478                            continue;
3479
3480                        if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3481                            continue;
3482
3483                        // If we get to here, the die is good, and we should add it:
3484                        if (resolved_dies.find(die) == resolved_dies.end())
3485                        if (ResolveFunction (dwarf_cu, die, sc_list))
3486                        {
3487                            bool keep_die = true;
3488                            if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3489                            {
3490                                // We are looking for either basenames or methods, so we need to
3491                                // trim out the ones we won't want by looking at the type
3492                                SymbolContext sc;
3493                                if (sc_list.GetLastContext(sc))
3494                                {
3495                                    if (sc.block)
3496                                    {
3497                                        // We have an inlined function
3498                                    }
3499                                    else if (sc.function)
3500                                    {
3501                                        Type *type = sc.function->GetType();
3502
3503                                        clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3504                                        if (decl_ctx->isRecord())
3505                                        {
3506                                            if (name_type_mask & eFunctionNameTypeBase)
3507                                            {
3508                                                sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3509                                                keep_die = false;
3510                                            }
3511                                        }
3512                                        else
3513                                        {
3514                                            if (name_type_mask & eFunctionNameTypeMethod)
3515                                            {
3516                                                sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3517                                                keep_die = false;
3518                                            }
3519                                        }
3520                                    }
3521                                }
3522                            }
3523                            if (keep_die)
3524                                resolved_dies.insert(die);
3525                        }
3526                    }
3527                    else
3528                    {
3529                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3530                                                                                   die_offset, name_cstr);
3531                    }
3532                }
3533                die_offsets.clear();
3534            }
3535        }
3536    }
3537    else
3538    {
3539
3540        // Index the DWARF if we haven't already
3541        if (!m_indexed)
3542            Index ();
3543
3544        if (name_type_mask & eFunctionNameTypeFull)
3545            FindFunctions (name, m_function_fullname_index, sc_list);
3546
3547        DIEArray die_offsets;
3548        DWARFCompileUnit *dwarf_cu = NULL;
3549
3550        if (name_type_mask & eFunctionNameTypeBase)
3551        {
3552            uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
3553            for (uint32_t i = 0; i < num_base; i++)
3554            {
3555                const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3556                if (die)
3557                {
3558                    if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3559                        continue;
3560
3561                    if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3562                        continue;
3563
3564                    // If we get to here, the die is good, and we should add it:
3565                    if (resolved_dies.find(die) == resolved_dies.end())
3566                    {
3567                        if (ResolveFunction (dwarf_cu, die, sc_list))
3568                            resolved_dies.insert(die);
3569                    }
3570                }
3571            }
3572            die_offsets.clear();
3573        }
3574
3575        if (name_type_mask & eFunctionNameTypeMethod)
3576        {
3577            if (namespace_decl && *namespace_decl)
3578                return 0; // no methods in namespaces
3579
3580            uint32_t num_base = m_function_method_index.Find(name, die_offsets);
3581            {
3582                for (uint32_t i = 0; i < num_base; i++)
3583                {
3584                    const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3585                    if (die)
3586                    {
3587                        if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3588                            continue;
3589
3590                        // If we get to here, the die is good, and we should add it:
3591                        if (resolved_dies.find(die) == resolved_dies.end())
3592                        {
3593                            if (ResolveFunction (dwarf_cu, die, sc_list))
3594                                resolved_dies.insert(die);
3595                        }
3596                    }
3597                }
3598            }
3599            die_offsets.clear();
3600        }
3601
3602        if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
3603        {
3604            FindFunctions (name, m_function_selector_index, sc_list);
3605        }
3606
3607    }
3608
3609    // Return the number of variable that were appended to the list
3610    const uint32_t num_matches = sc_list.GetSize() - original_size;
3611
3612    if (log && num_matches > 0)
3613    {
3614        GetObjectFile()->GetModule()->LogMessage (log,
3615                                                  "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list) => %u",
3616                                                  name.GetCString(),
3617                                                  name_type_mask,
3618                                                  append,
3619                                                  num_matches);
3620    }
3621    return num_matches;
3622}
3623
3624uint32_t
3625SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
3626{
3627    Timer scoped_timer (__PRETTY_FUNCTION__,
3628                        "SymbolFileDWARF::FindFunctions (regex = '%s')",
3629                        regex.GetText());
3630
3631    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3632
3633    if (log)
3634    {
3635        GetObjectFile()->GetModule()->LogMessage (log,
3636                                                  "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
3637                                                  regex.GetText(),
3638                                                  append);
3639    }
3640
3641
3642    // If we aren't appending the results to this list, then clear the list
3643    if (!append)
3644        sc_list.Clear();
3645
3646    // Remember how many sc_list are in the list before we search in case
3647    // we are appending the results to a variable list.
3648    uint32_t original_size = sc_list.GetSize();
3649
3650    if (m_using_apple_tables)
3651    {
3652        if (m_apple_names_ap.get())
3653            FindFunctions (regex, *m_apple_names_ap, sc_list);
3654    }
3655    else
3656    {
3657        // Index the DWARF if we haven't already
3658        if (!m_indexed)
3659            Index ();
3660
3661        FindFunctions (regex, m_function_basename_index, sc_list);
3662
3663        FindFunctions (regex, m_function_fullname_index, sc_list);
3664    }
3665
3666    // Return the number of variable that were appended to the list
3667    return sc_list.GetSize() - original_size;
3668}
3669
3670uint32_t
3671SymbolFileDWARF::FindTypes (const SymbolContext& sc,
3672                            const ConstString &name,
3673                            const lldb_private::ClangNamespaceDecl *namespace_decl,
3674                            bool append,
3675                            uint32_t max_matches,
3676                            TypeList& types)
3677{
3678    DWARFDebugInfo* info = DebugInfo();
3679    if (info == NULL)
3680        return 0;
3681
3682    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3683
3684    if (log)
3685    {
3686        if (namespace_decl)
3687        {
3688            GetObjectFile()->GetModule()->LogMessage (log,
3689                                                      "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
3690                                                      name.GetCString(),
3691                                                      namespace_decl->GetNamespaceDecl(),
3692                                                      namespace_decl->GetQualifiedName().c_str(),
3693                                                      append,
3694                                                      max_matches);
3695        }
3696        else
3697        {
3698            GetObjectFile()->GetModule()->LogMessage (log,
3699                                                      "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
3700                                                      name.GetCString(),
3701                                                      append,
3702                                                      max_matches);
3703        }
3704    }
3705
3706    // If we aren't appending the results to this list, then clear the list
3707    if (!append)
3708        types.Clear();
3709
3710    if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3711		return 0;
3712
3713    DIEArray die_offsets;
3714
3715    if (m_using_apple_tables)
3716    {
3717        if (m_apple_types_ap.get())
3718        {
3719            const char *name_cstr = name.GetCString();
3720            m_apple_types_ap->FindByName (name_cstr, die_offsets);
3721        }
3722    }
3723    else
3724    {
3725        if (!m_indexed)
3726            Index ();
3727
3728        m_type_index.Find (name, die_offsets);
3729    }
3730
3731    const size_t num_die_matches = die_offsets.size();
3732
3733    if (num_die_matches)
3734    {
3735        const uint32_t initial_types_size = types.GetSize();
3736        DWARFCompileUnit* dwarf_cu = NULL;
3737        const DWARFDebugInfoEntry* die = NULL;
3738        DWARFDebugInfo* debug_info = DebugInfo();
3739        for (size_t i=0; i<num_die_matches; ++i)
3740        {
3741            const dw_offset_t die_offset = die_offsets[i];
3742            die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3743
3744            if (die)
3745            {
3746                if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3747                    continue;
3748
3749                Type *matching_type = ResolveType (dwarf_cu, die);
3750                if (matching_type)
3751                {
3752                    // We found a type pointer, now find the shared pointer form our type list
3753                    types.InsertUnique (matching_type->shared_from_this());
3754                    if (types.GetSize() >= max_matches)
3755                        break;
3756                }
3757            }
3758            else
3759            {
3760                if (m_using_apple_tables)
3761                {
3762                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
3763                                                                               die_offset, name.GetCString());
3764                }
3765            }
3766
3767        }
3768        const uint32_t num_matches = types.GetSize() - initial_types_size;
3769        if (log && num_matches)
3770        {
3771            if (namespace_decl)
3772            {
3773                GetObjectFile()->GetModule()->LogMessage (log,
3774                                                          "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
3775                                                          name.GetCString(),
3776                                                          namespace_decl->GetNamespaceDecl(),
3777                                                          namespace_decl->GetQualifiedName().c_str(),
3778                                                          append,
3779                                                          max_matches,
3780                                                          num_matches);
3781            }
3782            else
3783            {
3784                GetObjectFile()->GetModule()->LogMessage (log,
3785                                                          "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
3786                                                          name.GetCString(),
3787                                                          append,
3788                                                          max_matches,
3789                                                          num_matches);
3790            }
3791        }
3792        return num_matches;
3793    }
3794    return 0;
3795}
3796
3797
3798ClangNamespaceDecl
3799SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
3800                                const ConstString &name,
3801                                const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
3802{
3803    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3804
3805    if (log)
3806    {
3807        GetObjectFile()->GetModule()->LogMessage (log,
3808                                                  "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
3809                                                  name.GetCString());
3810    }
3811
3812    if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
3813		return ClangNamespaceDecl();
3814
3815    ClangNamespaceDecl namespace_decl;
3816    DWARFDebugInfo* info = DebugInfo();
3817    if (info)
3818    {
3819        DIEArray die_offsets;
3820
3821        // Index if we already haven't to make sure the compile units
3822        // get indexed and make their global DIE index list
3823        if (m_using_apple_tables)
3824        {
3825            if (m_apple_namespaces_ap.get())
3826            {
3827                const char *name_cstr = name.GetCString();
3828                m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
3829            }
3830        }
3831        else
3832        {
3833            if (!m_indexed)
3834                Index ();
3835
3836            m_namespace_index.Find (name, die_offsets);
3837        }
3838
3839        DWARFCompileUnit* dwarf_cu = NULL;
3840        const DWARFDebugInfoEntry* die = NULL;
3841        const size_t num_matches = die_offsets.size();
3842        if (num_matches)
3843        {
3844            DWARFDebugInfo* debug_info = DebugInfo();
3845            for (size_t i=0; i<num_matches; ++i)
3846            {
3847                const dw_offset_t die_offset = die_offsets[i];
3848                die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3849
3850                if (die)
3851                {
3852                    if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
3853                        continue;
3854
3855                    clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
3856                    if (clang_namespace_decl)
3857                    {
3858                        namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
3859                        namespace_decl.SetNamespaceDecl (clang_namespace_decl);
3860                        break;
3861                    }
3862                }
3863                else
3864                {
3865                    if (m_using_apple_tables)
3866                    {
3867                        GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
3868                                                                   die_offset, name.GetCString());
3869                    }
3870                }
3871
3872            }
3873        }
3874    }
3875    if (log && namespace_decl.GetNamespaceDecl())
3876    {
3877        GetObjectFile()->GetModule()->LogMessage (log,
3878                                                  "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
3879                                                  name.GetCString(),
3880                                                  namespace_decl.GetNamespaceDecl(),
3881                                                  namespace_decl.GetQualifiedName().c_str());
3882    }
3883
3884    return namespace_decl;
3885}
3886
3887uint32_t
3888SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
3889{
3890    // Remember how many sc_list are in the list before we search in case
3891    // we are appending the results to a variable list.
3892    uint32_t original_size = types.GetSize();
3893
3894    const uint32_t num_die_offsets = die_offsets.size();
3895    // Parse all of the types we found from the pubtypes matches
3896    uint32_t i;
3897    uint32_t num_matches = 0;
3898    for (i = 0; i < num_die_offsets; ++i)
3899    {
3900        Type *matching_type = ResolveTypeUID (die_offsets[i]);
3901        if (matching_type)
3902        {
3903            // We found a type pointer, now find the shared pointer form our type list
3904            types.InsertUnique (matching_type->shared_from_this());
3905            ++num_matches;
3906            if (num_matches >= max_matches)
3907                break;
3908        }
3909    }
3910
3911    // Return the number of variable that were appended to the list
3912    return types.GetSize() - original_size;
3913}
3914
3915
3916size_t
3917SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
3918                                       clang::DeclContext *containing_decl_ctx,
3919                                       DWARFCompileUnit* dwarf_cu,
3920                                       const DWARFDebugInfoEntry *parent_die,
3921                                       bool skip_artificial,
3922                                       bool &is_static,
3923                                       TypeList* type_list,
3924                                       std::vector<clang_type_t>& function_param_types,
3925                                       std::vector<clang::ParmVarDecl*>& function_param_decls,
3926                                       unsigned &type_quals,
3927                                       ClangASTContext::TemplateParameterInfos &template_param_infos)
3928{
3929    if (parent_die == NULL)
3930        return 0;
3931
3932    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
3933
3934    size_t arg_idx = 0;
3935    const DWARFDebugInfoEntry *die;
3936    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
3937    {
3938        dw_tag_t tag = die->Tag();
3939        switch (tag)
3940        {
3941        case DW_TAG_formal_parameter:
3942            {
3943                DWARFDebugInfoEntry::Attributes attributes;
3944                const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
3945                if (num_attributes > 0)
3946                {
3947                    const char *name = NULL;
3948                    Declaration decl;
3949                    dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
3950                    bool is_artificial = false;
3951                    // one of None, Auto, Register, Extern, Static, PrivateExtern
3952
3953                    clang::StorageClass storage = clang::SC_None;
3954                    uint32_t i;
3955                    for (i=0; i<num_attributes; ++i)
3956                    {
3957                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
3958                        DWARFFormValue form_value;
3959                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
3960                        {
3961                            switch (attr)
3962                            {
3963                            case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
3964                            case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
3965                            case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
3966                            case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
3967                            case DW_AT_type:        param_type_die_offset = form_value.Reference(dwarf_cu); break;
3968                            case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
3969                            case DW_AT_location:
3970    //                          if (form_value.BlockData())
3971    //                          {
3972    //                              const DataExtractor& debug_info_data = debug_info();
3973    //                              uint32_t block_length = form_value.Unsigned();
3974    //                              DataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
3975    //                          }
3976    //                          else
3977    //                          {
3978    //                          }
3979    //                          break;
3980                            case DW_AT_const_value:
3981                            case DW_AT_default_value:
3982                            case DW_AT_description:
3983                            case DW_AT_endianity:
3984                            case DW_AT_is_optional:
3985                            case DW_AT_segment:
3986                            case DW_AT_variable_parameter:
3987                            default:
3988                            case DW_AT_abstract_origin:
3989                            case DW_AT_sibling:
3990                                break;
3991                            }
3992                        }
3993                    }
3994
3995                    bool skip = false;
3996                    if (skip_artificial)
3997                    {
3998                        if (is_artificial)
3999                        {
4000                            // In order to determine if a C++ member function is
4001                            // "const" we have to look at the const-ness of "this"...
4002                            // Ugly, but that
4003                            if (arg_idx == 0)
4004                            {
4005                                if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4006                                {
4007                                    // Often times compilers omit the "this" name for the
4008                                    // specification DIEs, so we can't rely upon the name
4009                                    // being in the formal parameter DIE...
4010                                    if (name == NULL || ::strcmp(name, "this")==0)
4011                                    {
4012                                        Type *this_type = ResolveTypeUID (param_type_die_offset);
4013                                        if (this_type)
4014                                        {
4015                                            uint32_t encoding_mask = this_type->GetEncodingMask();
4016                                            if (encoding_mask & Type::eEncodingIsPointerUID)
4017                                            {
4018                                                is_static = false;
4019
4020                                                if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4021                                                    type_quals |= clang::Qualifiers::Const;
4022                                                if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4023                                                    type_quals |= clang::Qualifiers::Volatile;
4024                                            }
4025                                        }
4026                                    }
4027                                }
4028                            }
4029                            skip = true;
4030                        }
4031                        else
4032                        {
4033
4034                            // HACK: Objective C formal parameters "self" and "_cmd"
4035                            // are not marked as artificial in the DWARF...
4036                            CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4037                            if (comp_unit)
4038                            {
4039                                switch (comp_unit->GetLanguage())
4040                                {
4041                                    case eLanguageTypeObjC:
4042                                    case eLanguageTypeObjC_plus_plus:
4043                                        if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4044                                            skip = true;
4045                                        break;
4046                                    default:
4047                                        break;
4048                                }
4049                            }
4050                        }
4051                    }
4052
4053                    if (!skip)
4054                    {
4055                        Type *type = ResolveTypeUID(param_type_die_offset);
4056                        if (type)
4057                        {
4058                            function_param_types.push_back (type->GetClangForwardType());
4059
4060                            clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4061                                                                                                                  type->GetClangForwardType(),
4062                                                                                                                  storage);
4063                            assert(param_var_decl);
4064                            function_param_decls.push_back(param_var_decl);
4065
4066                            GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4067                        }
4068                    }
4069                }
4070                arg_idx++;
4071            }
4072            break;
4073
4074        case DW_TAG_template_type_parameter:
4075        case DW_TAG_template_value_parameter:
4076            ParseTemplateDIE (dwarf_cu, die,template_param_infos);
4077            break;
4078
4079        default:
4080            break;
4081        }
4082    }
4083    return arg_idx;
4084}
4085
4086size_t
4087SymbolFileDWARF::ParseChildEnumerators
4088(
4089    const SymbolContext& sc,
4090    clang_type_t enumerator_clang_type,
4091    bool is_signed,
4092    uint32_t enumerator_byte_size,
4093    DWARFCompileUnit* dwarf_cu,
4094    const DWARFDebugInfoEntry *parent_die
4095)
4096{
4097    if (parent_die == NULL)
4098        return 0;
4099
4100    size_t enumerators_added = 0;
4101    const DWARFDebugInfoEntry *die;
4102    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4103
4104    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4105    {
4106        const dw_tag_t tag = die->Tag();
4107        if (tag == DW_TAG_enumerator)
4108        {
4109            DWARFDebugInfoEntry::Attributes attributes;
4110            const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4111            if (num_child_attributes > 0)
4112            {
4113                const char *name = NULL;
4114                bool got_value = false;
4115                int64_t enum_value = 0;
4116                Declaration decl;
4117
4118                uint32_t i;
4119                for (i=0; i<num_child_attributes; ++i)
4120                {
4121                    const dw_attr_t attr = attributes.AttributeAtIndex(i);
4122                    DWARFFormValue form_value;
4123                    if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4124                    {
4125                        switch (attr)
4126                        {
4127                        case DW_AT_const_value:
4128                            got_value = true;
4129                            if (is_signed)
4130                                enum_value = form_value.Signed();
4131                            else
4132                                enum_value = form_value.Unsigned();
4133                            break;
4134
4135                        case DW_AT_name:
4136                            name = form_value.AsCString(&get_debug_str_data());
4137                            break;
4138
4139                        case DW_AT_description:
4140                        default:
4141                        case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4142                        case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4143                        case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4144                        case DW_AT_sibling:
4145                            break;
4146                        }
4147                    }
4148                }
4149
4150                if (name && name[0] && got_value)
4151                {
4152                    GetClangASTContext().AddEnumerationValueToEnumerationType (enumerator_clang_type,
4153                                                                               enumerator_clang_type,
4154                                                                               decl,
4155                                                                               name,
4156                                                                               enum_value,
4157                                                                               enumerator_byte_size * 8);
4158                    ++enumerators_added;
4159                }
4160            }
4161        }
4162    }
4163    return enumerators_added;
4164}
4165
4166void
4167SymbolFileDWARF::ParseChildArrayInfo
4168(
4169    const SymbolContext& sc,
4170    DWARFCompileUnit* dwarf_cu,
4171    const DWARFDebugInfoEntry *parent_die,
4172    int64_t& first_index,
4173    std::vector<uint64_t>& element_orders,
4174    uint32_t& byte_stride,
4175    uint32_t& bit_stride
4176)
4177{
4178    if (parent_die == NULL)
4179        return;
4180
4181    const DWARFDebugInfoEntry *die;
4182    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4183    for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4184    {
4185        const dw_tag_t tag = die->Tag();
4186        switch (tag)
4187        {
4188        case DW_TAG_subrange_type:
4189            {
4190                DWARFDebugInfoEntry::Attributes attributes;
4191                const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4192                if (num_child_attributes > 0)
4193                {
4194                    uint64_t num_elements = 0;
4195                    uint64_t lower_bound = 0;
4196                    uint64_t upper_bound = 0;
4197                    bool upper_bound_valid = false;
4198                    uint32_t i;
4199                    for (i=0; i<num_child_attributes; ++i)
4200                    {
4201                        const dw_attr_t attr = attributes.AttributeAtIndex(i);
4202                        DWARFFormValue form_value;
4203                        if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4204                        {
4205                            switch (attr)
4206                            {
4207                            case DW_AT_name:
4208                                break;
4209
4210                            case DW_AT_count:
4211                                num_elements = form_value.Unsigned();
4212                                break;
4213
4214                            case DW_AT_bit_stride:
4215                                bit_stride = form_value.Unsigned();
4216                                break;
4217
4218                            case DW_AT_byte_stride:
4219                                byte_stride = form_value.Unsigned();
4220                                break;
4221
4222                            case DW_AT_lower_bound:
4223                                lower_bound = form_value.Unsigned();
4224                                break;
4225
4226                            case DW_AT_upper_bound:
4227                                upper_bound_valid = true;
4228                                upper_bound = form_value.Unsigned();
4229                                break;
4230
4231                            default:
4232                            case DW_AT_abstract_origin:
4233                            case DW_AT_accessibility:
4234                            case DW_AT_allocated:
4235                            case DW_AT_associated:
4236                            case DW_AT_data_location:
4237                            case DW_AT_declaration:
4238                            case DW_AT_description:
4239                            case DW_AT_sibling:
4240                            case DW_AT_threads_scaled:
4241                            case DW_AT_type:
4242                            case DW_AT_visibility:
4243                                break;
4244                            }
4245                        }
4246                    }
4247
4248                    if (num_elements == 0)
4249                    {
4250                        if (upper_bound_valid && upper_bound >= lower_bound)
4251                            num_elements = upper_bound - lower_bound + 1;
4252                    }
4253
4254                    element_orders.push_back (num_elements);
4255                }
4256            }
4257            break;
4258        }
4259    }
4260}
4261
4262TypeSP
4263SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4264{
4265    TypeSP type_sp;
4266    if (die != NULL)
4267    {
4268        assert(dwarf_cu != NULL);
4269        Type *type_ptr = m_die_to_type.lookup (die);
4270        if (type_ptr == NULL)
4271        {
4272            CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4273            assert (lldb_cu);
4274            SymbolContext sc(lldb_cu);
4275            type_sp = ParseType(sc, dwarf_cu, die, NULL);
4276        }
4277        else if (type_ptr != DIE_IS_BEING_PARSED)
4278        {
4279            // Grab the existing type from the master types lists
4280            type_sp = type_ptr->shared_from_this();
4281        }
4282
4283    }
4284    return type_sp;
4285}
4286
4287clang::DeclContext *
4288SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4289{
4290    if (die_offset != DW_INVALID_OFFSET)
4291    {
4292        DWARFCompileUnitSP cu_sp;
4293        const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4294        return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4295    }
4296    return NULL;
4297}
4298
4299clang::DeclContext *
4300SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4301{
4302    if (die_offset != DW_INVALID_OFFSET)
4303    {
4304        DWARFDebugInfo* debug_info = DebugInfo();
4305        if (debug_info)
4306        {
4307            DWARFCompileUnitSP cu_sp;
4308            const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4309            if (die)
4310                return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4311        }
4312    }
4313    return NULL;
4314}
4315
4316clang::NamespaceDecl *
4317SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4318{
4319    if (die && die->Tag() == DW_TAG_namespace)
4320    {
4321        // See if we already parsed this namespace DIE and associated it with a
4322        // uniqued namespace declaration
4323        clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4324        if (namespace_decl)
4325            return namespace_decl;
4326        else
4327        {
4328            const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4329            clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4330            namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4331            Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4332            if (log)
4333            {
4334                if (namespace_name)
4335                {
4336                    GetObjectFile()->GetModule()->LogMessage (log,
4337                                                              "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4338                                                              GetClangASTContext().getASTContext(),
4339                                                              MakeUserID(die->GetOffset()),
4340                                                              namespace_name,
4341                                                              namespace_decl,
4342                                                              namespace_decl->getOriginalNamespace());
4343                }
4344                else
4345                {
4346                    GetObjectFile()->GetModule()->LogMessage (log,
4347                                                              "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4348                                                              GetClangASTContext().getASTContext(),
4349                                                              MakeUserID(die->GetOffset()),
4350                                                              namespace_decl,
4351                                                              namespace_decl->getOriginalNamespace());
4352                }
4353            }
4354
4355            if (namespace_decl)
4356                LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4357            return namespace_decl;
4358        }
4359    }
4360    return NULL;
4361}
4362
4363clang::DeclContext *
4364SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4365{
4366    clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4367    if (clang_decl_ctx)
4368        return clang_decl_ctx;
4369    // If this DIE has a specification, or an abstract origin, then trace to those.
4370
4371    dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4372    if (die_offset != DW_INVALID_OFFSET)
4373        return GetClangDeclContextForDIEOffset (sc, die_offset);
4374
4375    die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4376    if (die_offset != DW_INVALID_OFFSET)
4377        return GetClangDeclContextForDIEOffset (sc, die_offset);
4378
4379    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4380    if (log)
4381        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));
4382    // This is the DIE we want.  Parse it, then query our map.
4383    bool assert_not_being_parsed = true;
4384    ResolveTypeUID (cu, die, assert_not_being_parsed);
4385
4386    clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4387
4388    return clang_decl_ctx;
4389}
4390
4391clang::DeclContext *
4392SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4393{
4394    if (m_clang_tu_decl == NULL)
4395        m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4396
4397    const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4398
4399    if (decl_ctx_die_copy)
4400        *decl_ctx_die_copy = decl_ctx_die;
4401
4402    if (decl_ctx_die)
4403    {
4404
4405        DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4406        if (pos != m_die_to_decl_ctx.end())
4407            return pos->second;
4408
4409        switch (decl_ctx_die->Tag())
4410        {
4411        case DW_TAG_compile_unit:
4412            return m_clang_tu_decl;
4413
4414        case DW_TAG_namespace:
4415            return ResolveNamespaceDIE (cu, decl_ctx_die);
4416            break;
4417
4418        case DW_TAG_structure_type:
4419        case DW_TAG_union_type:
4420        case DW_TAG_class_type:
4421            {
4422                Type* type = ResolveType (cu, decl_ctx_die);
4423                if (type)
4424                {
4425                    clang::DeclContext *decl_ctx = ClangASTContext::GetDeclContextForType (type->GetClangForwardType ());
4426                    if (decl_ctx)
4427                    {
4428                        LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4429                        if (decl_ctx)
4430                            return decl_ctx;
4431                    }
4432                }
4433            }
4434            break;
4435
4436        default:
4437            break;
4438        }
4439    }
4440    return m_clang_tu_decl;
4441}
4442
4443
4444const DWARFDebugInfoEntry *
4445SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4446{
4447    if (cu && die)
4448    {
4449        const DWARFDebugInfoEntry * const decl_die = die;
4450
4451        while (die != NULL)
4452        {
4453            // If this is the original DIE that we are searching for a declaration
4454            // for, then don't look in the cache as we don't want our own decl
4455            // context to be our decl context...
4456            if (decl_die != die)
4457            {
4458                switch (die->Tag())
4459                {
4460                    case DW_TAG_compile_unit:
4461                    case DW_TAG_namespace:
4462                    case DW_TAG_structure_type:
4463                    case DW_TAG_union_type:
4464                    case DW_TAG_class_type:
4465                        return die;
4466
4467                    default:
4468                        break;
4469                }
4470            }
4471
4472            dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4473            if (die_offset != DW_INVALID_OFFSET)
4474            {
4475                DWARFCompileUnit *spec_cu = cu;
4476                const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4477                const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4478                if (spec_die_decl_ctx_die)
4479                    return spec_die_decl_ctx_die;
4480            }
4481
4482            die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4483            if (die_offset != DW_INVALID_OFFSET)
4484            {
4485                DWARFCompileUnit *abs_cu = cu;
4486                const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4487                const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4488                if (abs_die_decl_ctx_die)
4489                    return abs_die_decl_ctx_die;
4490            }
4491
4492            die = die->GetParent();
4493        }
4494    }
4495    return NULL;
4496}
4497
4498
4499Symbol *
4500SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
4501{
4502    Symbol *objc_class_symbol = NULL;
4503    if (m_obj_file)
4504    {
4505        Symtab *symtab = m_obj_file->GetSymtab();
4506        if (symtab)
4507        {
4508            objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
4509                                                                        eSymbolTypeObjCClass,
4510                                                                        Symtab::eDebugNo,
4511                                                                        Symtab::eVisibilityAny);
4512        }
4513    }
4514    return objc_class_symbol;
4515}
4516
4517// Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
4518// then we can end up looking through all class types for a complete type and never find
4519// the full definition. We need to know if this attribute is supported, so we determine
4520// this here and cache th result. We also need to worry about the debug map DWARF file
4521// if we are doing darwin DWARF in .o file debugging.
4522bool
4523SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
4524{
4525    if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
4526    {
4527        m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
4528        if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
4529            m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4530        else
4531        {
4532            DWARFDebugInfo* debug_info = DebugInfo();
4533            const uint32_t num_compile_units = GetNumCompileUnits();
4534            for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
4535            {
4536                DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
4537                if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
4538                {
4539                    m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4540                    break;
4541                }
4542            }
4543        }
4544        if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
4545            return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
4546    }
4547    return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
4548}
4549
4550// This function can be used when a DIE is found that is a forward declaration
4551// DIE and we want to try and find a type that has the complete definition.
4552TypeSP
4553SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
4554                                                       const ConstString &type_name,
4555                                                       bool must_be_implementation)
4556{
4557
4558    TypeSP type_sp;
4559
4560    if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
4561        return type_sp;
4562
4563    DIEArray die_offsets;
4564
4565    if (m_using_apple_tables)
4566    {
4567        if (m_apple_types_ap.get())
4568        {
4569            const char *name_cstr = type_name.GetCString();
4570            m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
4571        }
4572    }
4573    else
4574    {
4575        if (!m_indexed)
4576            Index ();
4577
4578        m_type_index.Find (type_name, die_offsets);
4579    }
4580
4581    const size_t num_matches = die_offsets.size();
4582
4583    DWARFCompileUnit* type_cu = NULL;
4584    const DWARFDebugInfoEntry* type_die = NULL;
4585    if (num_matches)
4586    {
4587        DWARFDebugInfo* debug_info = DebugInfo();
4588        for (size_t i=0; i<num_matches; ++i)
4589        {
4590            const dw_offset_t die_offset = die_offsets[i];
4591            type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4592
4593            if (type_die)
4594            {
4595                bool try_resolving_type = false;
4596
4597                // Don't try and resolve the DIE we are looking for with the DIE itself!
4598                if (type_die != die)
4599                {
4600                    switch (type_die->Tag())
4601                    {
4602                        case DW_TAG_class_type:
4603                        case DW_TAG_structure_type:
4604                            try_resolving_type = true;
4605                            break;
4606                        default:
4607                            break;
4608                    }
4609                }
4610
4611                if (try_resolving_type)
4612                {
4613					if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
4614	                    try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
4615
4616                    if (try_resolving_type)
4617                    {
4618                        Type *resolved_type = ResolveType (type_cu, type_die, false);
4619                        if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4620                        {
4621                            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",
4622                                          MakeUserID(die->GetOffset()),
4623                                          MakeUserID(dwarf_cu->GetOffset()),
4624                                          m_obj_file->GetFileSpec().GetFilename().AsCString(),
4625                                          MakeUserID(type_die->GetOffset()),
4626                                          MakeUserID(type_cu->GetOffset()));
4627
4628                            if (die)
4629                                m_die_to_type[die] = resolved_type;
4630                            type_sp = resolved_type->shared_from_this();
4631                            break;
4632                        }
4633                    }
4634                }
4635            }
4636            else
4637            {
4638                if (m_using_apple_tables)
4639                {
4640                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4641                                                               die_offset, type_name.GetCString());
4642                }
4643            }
4644
4645        }
4646    }
4647    return type_sp;
4648}
4649
4650
4651//----------------------------------------------------------------------
4652// This function helps to ensure that the declaration contexts match for
4653// two different DIEs. Often times debug information will refer to a
4654// forward declaration of a type (the equivalent of "struct my_struct;".
4655// There will often be a declaration of that type elsewhere that has the
4656// full definition. When we go looking for the full type "my_struct", we
4657// will find one or more matches in the accelerator tables and we will
4658// then need to make sure the type was in the same declaration context
4659// as the original DIE. This function can efficiently compare two DIEs
4660// and will return true when the declaration context matches, and false
4661// when they don't.
4662//----------------------------------------------------------------------
4663bool
4664SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
4665                                       DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
4666{
4667    if (die1 == die2)
4668        return true;
4669
4670#if defined (LLDB_CONFIGURATION_DEBUG)
4671    // You can't and shouldn't call this function with a compile unit from
4672    // two different SymbolFileDWARF instances.
4673    assert (DebugInfo()->ContainsCompileUnit (cu1));
4674    assert (DebugInfo()->ContainsCompileUnit (cu2));
4675#endif
4676
4677    DWARFDIECollection decl_ctx_1;
4678    DWARFDIECollection decl_ctx_2;
4679    //The declaration DIE stack is a stack of the declaration context
4680    // DIEs all the way back to the compile unit. If a type "T" is
4681    // declared inside a class "B", and class "B" is declared inside
4682    // a class "A" and class "A" is in a namespace "lldb", and the
4683    // namespace is in a compile unit, there will be a stack of DIEs:
4684    //
4685    //   [0] DW_TAG_class_type for "B"
4686    //   [1] DW_TAG_class_type for "A"
4687    //   [2] DW_TAG_namespace  for "lldb"
4688    //   [3] DW_TAG_compile_unit for the source file.
4689    //
4690    // We grab both contexts and make sure that everything matches
4691    // all the way back to the compiler unit.
4692
4693    // First lets grab the decl contexts for both DIEs
4694    die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
4695    die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
4696    // Make sure the context arrays have the same size, otherwise
4697    // we are done
4698    const size_t count1 = decl_ctx_1.Size();
4699    const size_t count2 = decl_ctx_2.Size();
4700    if (count1 != count2)
4701        return false;
4702
4703    // Make sure the DW_TAG values match all the way back up the the
4704    // compile unit. If they don't, then we are done.
4705    const DWARFDebugInfoEntry *decl_ctx_die1;
4706    const DWARFDebugInfoEntry *decl_ctx_die2;
4707    size_t i;
4708    for (i=0; i<count1; i++)
4709    {
4710        decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4711        decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4712        if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
4713            return false;
4714    }
4715#if defined LLDB_CONFIGURATION_DEBUG
4716
4717    // Make sure the top item in the decl context die array is always
4718    // DW_TAG_compile_unit. If it isn't then something went wrong in
4719    // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
4720    assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
4721
4722#endif
4723    // Always skip the compile unit when comparing by only iterating up to
4724    // "count - 1". Here we compare the names as we go.
4725    for (i=0; i<count1 - 1; i++)
4726    {
4727        decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4728        decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4729        const char *name1 = decl_ctx_die1->GetName(this, cu1);
4730        const char *name2 = decl_ctx_die2->GetName(this, cu2);
4731        // If the string was from a DW_FORM_strp, then the pointer will often
4732        // be the same!
4733        if (name1 == name2)
4734            continue;
4735
4736        // Name pointers are not equal, so only compare the strings
4737        // if both are not NULL.
4738        if (name1 && name2)
4739        {
4740            // If the strings don't compare, we are done...
4741            if (strcmp(name1, name2) != 0)
4742                return false;
4743        }
4744        else
4745        {
4746            // One name was NULL while the other wasn't
4747            return false;
4748        }
4749    }
4750    // We made it through all of the checks and the declaration contexts
4751    // are equal.
4752    return true;
4753}
4754
4755// This function can be used when a DIE is found that is a forward declaration
4756// DIE and we want to try and find a type that has the complete definition.
4757// "cu" and "die" must be from this SymbolFileDWARF
4758TypeSP
4759SymbolFileDWARF::FindDefinitionTypeForDIE (DWARFCompileUnit* cu,
4760                                           const DWARFDebugInfoEntry *die,
4761                                           const ConstString &type_name)
4762{
4763    TypeSP type_sp;
4764
4765#if defined (LLDB_CONFIGURATION_DEBUG)
4766    // You can't and shouldn't call this function with a compile unit from
4767    // another SymbolFileDWARF instance.
4768    assert (DebugInfo()->ContainsCompileUnit (cu));
4769#endif
4770
4771    if (cu == NULL || die == NULL || !type_name)
4772        return type_sp;
4773
4774    std::string qualified_name;
4775
4776    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
4777    if (log)
4778    {
4779        die->GetQualifiedName(this, cu, qualified_name);
4780        GetObjectFile()->GetModule()->LogMessage (log,
4781                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x (%s), name='%s')",
4782                                                  die->GetOffset(),
4783                                                  qualified_name.c_str(),
4784                                                  type_name.GetCString());
4785    }
4786
4787    DIEArray die_offsets;
4788
4789    if (m_using_apple_tables)
4790    {
4791        if (m_apple_types_ap.get())
4792        {
4793            const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
4794            const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
4795            if (has_tag && has_qualified_name_hash)
4796            {
4797                if (qualified_name.empty())
4798                    die->GetQualifiedName(this, cu, qualified_name);
4799
4800                const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name.c_str());
4801                if (log)
4802                    GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
4803                m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), die->Tag(), qualified_name_hash, die_offsets);
4804            }
4805            else if (has_tag > 1)
4806            {
4807                if (log)
4808                    GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
4809                m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), die->Tag(), die_offsets);
4810            }
4811            else
4812            {
4813                m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
4814            }
4815        }
4816    }
4817    else
4818    {
4819        if (!m_indexed)
4820            Index ();
4821
4822        m_type_index.Find (type_name, die_offsets);
4823    }
4824
4825    const size_t num_matches = die_offsets.size();
4826
4827    const dw_tag_t die_tag = die->Tag();
4828
4829    DWARFCompileUnit* type_cu = NULL;
4830    const DWARFDebugInfoEntry* type_die = NULL;
4831    if (num_matches)
4832    {
4833        DWARFDebugInfo* debug_info = DebugInfo();
4834        for (size_t i=0; i<num_matches; ++i)
4835        {
4836            const dw_offset_t die_offset = die_offsets[i];
4837            type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4838
4839            if (type_die)
4840            {
4841                bool try_resolving_type = false;
4842
4843                // Don't try and resolve the DIE we are looking for with the DIE itself!
4844                if (type_die != die)
4845                {
4846                    const dw_tag_t type_die_tag = type_die->Tag();
4847                    // Make sure the tags match
4848                    if (type_die_tag == die_tag)
4849                    {
4850                        // The tags match, lets try resolving this type
4851                        try_resolving_type = true;
4852                    }
4853                    else
4854                    {
4855                        // The tags don't match, but we need to watch our for a
4856                        // forward declaration for a struct and ("struct foo")
4857                        // ends up being a class ("class foo { ... };") or
4858                        // vice versa.
4859                        switch (type_die_tag)
4860                        {
4861                        case DW_TAG_class_type:
4862                            // We had a "class foo", see if we ended up with a "struct foo { ... };"
4863                            try_resolving_type = (die_tag == DW_TAG_structure_type);
4864                            break;
4865                        case DW_TAG_structure_type:
4866                            // We had a "struct foo", see if we ended up with a "class foo { ... };"
4867                            try_resolving_type = (die_tag == DW_TAG_class_type);
4868                            break;
4869                        default:
4870                            // Tags don't match, don't event try to resolve
4871                            // using this type whose name matches....
4872                            break;
4873                        }
4874                    }
4875                }
4876
4877                if (try_resolving_type)
4878                {
4879                    if (log)
4880                    {
4881                        std::string qualified_name;
4882                        type_die->GetQualifiedName(this, cu, qualified_name);
4883                        GetObjectFile()->GetModule()->LogMessage (log,
4884                                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') trying die=0x%8.8x (%s)",
4885                                                                  die->GetOffset(),
4886                                                                  type_name.GetCString(),
4887                                                                  type_die->GetOffset(),
4888                                                                  qualified_name.c_str());
4889                    }
4890
4891                    // Make sure the decl contexts match all the way up
4892                    if (DIEDeclContextsMatch(cu, die, type_cu, type_die))
4893                    {
4894                        Type *resolved_type = ResolveType (type_cu, type_die, false);
4895                        if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4896                        {
4897                            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",
4898                                          MakeUserID(die->GetOffset()),
4899                                          MakeUserID(dwarf_cu->GetOffset()),
4900                                          m_obj_file->GetFileSpec().GetFilename().AsCString(),
4901                                          MakeUserID(type_die->GetOffset()),
4902                                          MakeUserID(type_cu->GetOffset()));
4903
4904                            m_die_to_type[die] = resolved_type;
4905                            type_sp = resolved_type->shared_from_this();
4906                            break;
4907                        }
4908                    }
4909                }
4910                else
4911                {
4912                    if (log)
4913                    {
4914                        std::string qualified_name;
4915                        type_die->GetQualifiedName(this, cu, qualified_name);
4916                        GetObjectFile()->GetModule()->LogMessage (log,
4917                                                                  "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') ignoring die=0x%8.8x (%s)",
4918                                                                  die->GetOffset(),
4919                                                                  type_name.GetCString(),
4920                                                                  type_die->GetOffset(),
4921                                                                  qualified_name.c_str());
4922                    }
4923                }
4924            }
4925            else
4926            {
4927                if (m_using_apple_tables)
4928                {
4929                    GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4930                                                                               die_offset, type_name.GetCString());
4931                }
4932            }
4933
4934        }
4935    }
4936    return type_sp;
4937}
4938
4939TypeSP
4940SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
4941{
4942    TypeSP type_sp;
4943
4944    const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
4945    if (dwarf_decl_ctx_count > 0)
4946    {
4947        const ConstString type_name(dwarf_decl_ctx[0].name);
4948        const dw_tag_t tag = dwarf_decl_ctx[0].tag;
4949
4950        if (type_name)
4951        {
4952            Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
4953            if (log)
4954            {
4955                GetObjectFile()->GetModule()->LogMessage (log,
4956                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
4957                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
4958                                                          dwarf_decl_ctx.GetQualifiedName());
4959            }
4960
4961            DIEArray die_offsets;
4962
4963            if (m_using_apple_tables)
4964            {
4965                if (m_apple_types_ap.get())
4966                {
4967                    const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
4968                    const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
4969                    if (has_tag && has_qualified_name_hash)
4970                    {
4971                        const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
4972                        const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
4973                        if (log)
4974                            GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
4975                        m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
4976                    }
4977                    else if (has_tag)
4978                    {
4979                        if (log)
4980                            GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
4981                        m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
4982                    }
4983                    else
4984                    {
4985                        m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
4986                    }
4987                }
4988            }
4989            else
4990            {
4991                if (!m_indexed)
4992                    Index ();
4993
4994                m_type_index.Find (type_name, die_offsets);
4995            }
4996
4997            const size_t num_matches = die_offsets.size();
4998
4999
5000            DWARFCompileUnit* type_cu = NULL;
5001            const DWARFDebugInfoEntry* type_die = NULL;
5002            if (num_matches)
5003            {
5004                DWARFDebugInfo* debug_info = DebugInfo();
5005                for (size_t i=0; i<num_matches; ++i)
5006                {
5007                    const dw_offset_t die_offset = die_offsets[i];
5008                    type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5009
5010                    if (type_die)
5011                    {
5012                        bool try_resolving_type = false;
5013
5014                        // Don't try and resolve the DIE we are looking for with the DIE itself!
5015                        const dw_tag_t type_tag = type_die->Tag();
5016                        // Make sure the tags match
5017                        if (type_tag == tag)
5018                        {
5019                            // The tags match, lets try resolving this type
5020                            try_resolving_type = true;
5021                        }
5022                        else
5023                        {
5024                            // The tags don't match, but we need to watch our for a
5025                            // forward declaration for a struct and ("struct foo")
5026                            // ends up being a class ("class foo { ... };") or
5027                            // vice versa.
5028                            switch (type_tag)
5029                            {
5030                                case DW_TAG_class_type:
5031                                    // We had a "class foo", see if we ended up with a "struct foo { ... };"
5032                                    try_resolving_type = (tag == DW_TAG_structure_type);
5033                                    break;
5034                                case DW_TAG_structure_type:
5035                                    // We had a "struct foo", see if we ended up with a "class foo { ... };"
5036                                    try_resolving_type = (tag == DW_TAG_class_type);
5037                                    break;
5038                                default:
5039                                    // Tags don't match, don't event try to resolve
5040                                    // using this type whose name matches....
5041                                    break;
5042                            }
5043                        }
5044
5045                        if (try_resolving_type)
5046                        {
5047                            DWARFDeclContext type_dwarf_decl_ctx;
5048                            type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5049
5050                            if (log)
5051                            {
5052                                GetObjectFile()->GetModule()->LogMessage (log,
5053                                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5054                                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5055                                                                          dwarf_decl_ctx.GetQualifiedName(),
5056                                                                          type_die->GetOffset(),
5057                                                                          type_dwarf_decl_ctx.GetQualifiedName());
5058                            }
5059
5060                            // Make sure the decl contexts match all the way up
5061                            if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5062                            {
5063                                Type *resolved_type = ResolveType (type_cu, type_die, false);
5064                                if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5065                                {
5066                                    type_sp = resolved_type->shared_from_this();
5067                                    break;
5068                                }
5069                            }
5070                        }
5071                        else
5072                        {
5073                            if (log)
5074                            {
5075                                std::string qualified_name;
5076                                type_die->GetQualifiedName(this, type_cu, qualified_name);
5077                                GetObjectFile()->GetModule()->LogMessage (log,
5078                                                                          "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5079                                                                          DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5080                                                                          dwarf_decl_ctx.GetQualifiedName(),
5081                                                                          type_die->GetOffset(),
5082                                                                          qualified_name.c_str());
5083                            }
5084                        }
5085                    }
5086                    else
5087                    {
5088                        if (m_using_apple_tables)
5089                        {
5090                            GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5091                                                                                       die_offset, type_name.GetCString());
5092                        }
5093                    }
5094
5095                }
5096            }
5097        }
5098    }
5099    return type_sp;
5100}
5101
5102bool
5103SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5104                                             Type *class_type,
5105                                             DWARFCompileUnit* src_cu,
5106                                             const DWARFDebugInfoEntry *src_class_die,
5107                                             DWARFCompileUnit* dst_cu,
5108                                             const DWARFDebugInfoEntry *dst_class_die,
5109                                             llvm::SmallVectorImpl <const DWARFDebugInfoEntry *> &failures)
5110{
5111    if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5112        return false;
5113    if (src_class_die->Tag() != dst_class_die->Tag())
5114        return false;
5115
5116    // We need to complete the class type so we can get all of the method types
5117    // parsed so we can then unique those types to their equivalent counterparts
5118    // in "dst_cu" and "dst_class_die"
5119    class_type->GetClangFullType();
5120
5121    const DWARFDebugInfoEntry *src_die;
5122    const DWARFDebugInfoEntry *dst_die;
5123    UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5124    UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5125    UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5126    UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5127    for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5128    {
5129        if (src_die->Tag() == DW_TAG_subprogram)
5130        {
5131            // Make sure this is a declaration and not a concrete instance by looking
5132            // for DW_AT_declaration set to 1. Sometimes concrete function instances
5133            // are placed inside the class definitions and shouldn't be included in
5134            // the list of things are are tracking here.
5135            if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5136            {
5137                const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5138                if (src_name)
5139                {
5140                    ConstString src_const_name(src_name);
5141                    if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5142                        src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5143                    else
5144                        src_name_to_die.Append(src_const_name.GetCString(), src_die);
5145                }
5146            }
5147        }
5148    }
5149    for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5150    {
5151        if (dst_die->Tag() == DW_TAG_subprogram)
5152        {
5153            // Make sure this is a declaration and not a concrete instance by looking
5154            // for DW_AT_declaration set to 1. Sometimes concrete function instances
5155            // are placed inside the class definitions and shouldn't be included in
5156            // the list of things are are tracking here.
5157            if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5158            {
5159                const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5160                if (dst_name)
5161                {
5162                    ConstString dst_const_name(dst_name);
5163                    if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5164                        dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5165                    else
5166                        dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5167                }
5168            }
5169        }
5170    }
5171    const uint32_t src_size = src_name_to_die.GetSize ();
5172    const uint32_t dst_size = dst_name_to_die.GetSize ();
5173    Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5174
5175    // Is everything kosher so we can go through the members at top speed?
5176    bool fast_path = true;
5177
5178    if (src_size != dst_size)
5179    {
5180        if (src_size != 0 && dst_size != 0)
5181        {
5182            if (log)
5183                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)",
5184                            src_class_die->GetOffset(),
5185                            dst_class_die->GetOffset(),
5186                            src_size,
5187                            dst_size);
5188        }
5189
5190        fast_path = false;
5191    }
5192
5193    uint32_t idx;
5194
5195    if (fast_path)
5196    {
5197        for (idx = 0; idx < src_size; ++idx)
5198        {
5199            src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5200            dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5201
5202            if (src_die->Tag() != dst_die->Tag())
5203            {
5204                if (log)
5205                    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)",
5206                                src_class_die->GetOffset(),
5207                                dst_class_die->GetOffset(),
5208                                src_die->GetOffset(),
5209                                DW_TAG_value_to_name(src_die->Tag()),
5210                                dst_die->GetOffset(),
5211                                DW_TAG_value_to_name(src_die->Tag()));
5212                fast_path = false;
5213            }
5214
5215            const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5216            const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5217
5218            // Make sure the names match
5219            if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5220                continue;
5221
5222            if (log)
5223                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)",
5224                            src_class_die->GetOffset(),
5225                            dst_class_die->GetOffset(),
5226                            src_die->GetOffset(),
5227                            src_name,
5228                            dst_die->GetOffset(),
5229                            dst_name);
5230
5231            fast_path = false;
5232        }
5233    }
5234
5235    // Now do the work of linking the DeclContexts and Types.
5236    if (fast_path)
5237    {
5238        // We can do this quickly.  Just run across the tables index-for-index since
5239        // we know each node has matching names and tags.
5240        for (idx = 0; idx < src_size; ++idx)
5241        {
5242            src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5243            dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5244
5245            clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5246            if (src_decl_ctx)
5247            {
5248                if (log)
5249                    log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5250                LinkDeclContextToDIE (src_decl_ctx, dst_die);
5251            }
5252            else
5253            {
5254                if (log)
5255                    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());
5256            }
5257
5258            Type *src_child_type = m_die_to_type[src_die];
5259            if (src_child_type)
5260            {
5261                if (log)
5262                    log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5263                m_die_to_type[dst_die] = src_child_type;
5264            }
5265            else
5266            {
5267                if (log)
5268                    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());
5269            }
5270        }
5271    }
5272    else
5273    {
5274        // We must do this slowly.  For each member of the destination, look
5275        // up a member in the source with the same name, check its tag, and
5276        // unique them if everything matches up.  Report failures.
5277
5278        if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5279        {
5280            src_name_to_die.Sort();
5281
5282            for (idx = 0; idx < dst_size; ++idx)
5283            {
5284                const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5285                dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5286                src_die = src_name_to_die.Find(dst_name, NULL);
5287
5288                if (src_die && (src_die->Tag() == dst_die->Tag()))
5289                {
5290                    clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5291                    if (src_decl_ctx)
5292                    {
5293                        if (log)
5294                            log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5295                        LinkDeclContextToDIE (src_decl_ctx, dst_die);
5296                    }
5297                    else
5298                    {
5299                        if (log)
5300                            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());
5301                    }
5302
5303                    Type *src_child_type = m_die_to_type[src_die];
5304                    if (src_child_type)
5305                    {
5306                        if (log)
5307                            log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5308                        m_die_to_type[dst_die] = src_child_type;
5309                    }
5310                    else
5311                    {
5312                        if (log)
5313                            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());
5314                    }
5315                }
5316                else
5317                {
5318                    if (log)
5319                        log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5320
5321                    failures.push_back(dst_die);
5322                }
5323            }
5324        }
5325    }
5326
5327    const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5328    const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5329
5330    UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5331
5332    if (src_size_artificial && dst_size_artificial)
5333    {
5334        dst_name_to_die_artificial.Sort();
5335
5336        for (idx = 0; idx < src_size_artificial; ++idx)
5337        {
5338            const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5339            src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5340            dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5341
5342            if (dst_die)
5343            {
5344                // Both classes have the artificial types, link them
5345                clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5346                if (src_decl_ctx)
5347                {
5348                    if (log)
5349                        log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5350                    LinkDeclContextToDIE (src_decl_ctx, dst_die);
5351                }
5352                else
5353                {
5354                    if (log)
5355                        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());
5356                }
5357
5358                Type *src_child_type = m_die_to_type[src_die];
5359                if (src_child_type)
5360                {
5361                    if (log)
5362                        log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5363                    m_die_to_type[dst_die] = src_child_type;
5364                }
5365                else
5366                {
5367                    if (log)
5368                        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());
5369                }
5370            }
5371        }
5372    }
5373
5374    if (dst_size_artificial)
5375    {
5376        for (idx = 0; idx < dst_size_artificial; ++idx)
5377        {
5378            const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5379            dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5380            if (log)
5381                log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5382
5383            failures.push_back(dst_die);
5384        }
5385    }
5386
5387    return (failures.size() != 0);
5388}
5389
5390TypeSP
5391SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5392{
5393    TypeSP type_sp;
5394
5395    if (type_is_new_ptr)
5396        *type_is_new_ptr = false;
5397
5398#if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5399    static DIEStack g_die_stack;
5400    DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5401#endif
5402
5403    AccessType accessibility = eAccessNone;
5404    if (die != NULL)
5405    {
5406        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5407        if (log)
5408        {
5409            const DWARFDebugInfoEntry *context_die;
5410            clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5411
5412            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5413                        die->GetOffset(),
5414                        context,
5415                        context_die->GetOffset(),
5416                        DW_TAG_value_to_name(die->Tag()),
5417                        die->GetName(this, dwarf_cu));
5418
5419#if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5420            scoped_die_logger.Push (dwarf_cu, die);
5421            g_die_stack.LogDIEs(log, this);
5422#endif
5423        }
5424//
5425//        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5426//        if (log && dwarf_cu)
5427//        {
5428//            StreamString s;
5429//            die->DumpLocation (this, dwarf_cu, s);
5430//            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5431//
5432//        }
5433
5434        Type *type_ptr = m_die_to_type.lookup (die);
5435        TypeList* type_list = GetTypeList();
5436        if (type_ptr == NULL)
5437        {
5438            ClangASTContext &ast = GetClangASTContext();
5439            if (type_is_new_ptr)
5440                *type_is_new_ptr = true;
5441
5442            const dw_tag_t tag = die->Tag();
5443
5444            bool is_forward_declaration = false;
5445            DWARFDebugInfoEntry::Attributes attributes;
5446            const char *type_name_cstr = NULL;
5447            ConstString type_name_const_str;
5448            Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5449            uint64_t byte_size = 0;
5450            Declaration decl;
5451
5452            Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5453            clang_type_t clang_type = NULL;
5454
5455            dw_attr_t attr;
5456
5457            switch (tag)
5458            {
5459            case DW_TAG_base_type:
5460            case DW_TAG_pointer_type:
5461            case DW_TAG_reference_type:
5462            case DW_TAG_rvalue_reference_type:
5463            case DW_TAG_typedef:
5464            case DW_TAG_const_type:
5465            case DW_TAG_restrict_type:
5466            case DW_TAG_volatile_type:
5467            case DW_TAG_unspecified_type:
5468                {
5469                    // Set a bit that lets us know that we are currently parsing this
5470                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
5471
5472                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5473                    uint32_t encoding = 0;
5474                    lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5475
5476                    if (num_attributes > 0)
5477                    {
5478                        uint32_t i;
5479                        for (i=0; i<num_attributes; ++i)
5480                        {
5481                            attr = attributes.AttributeAtIndex(i);
5482                            DWARFFormValue form_value;
5483                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5484                            {
5485                                switch (attr)
5486                                {
5487                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5488                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5489                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5490                                case DW_AT_name:
5491
5492                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
5493                                    // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5494                                    // include the "&"...
5495                                    if (tag == DW_TAG_reference_type)
5496                                    {
5497                                        if (strchr (type_name_cstr, '&') == NULL)
5498                                            type_name_cstr = NULL;
5499                                    }
5500                                    if (type_name_cstr)
5501                                        type_name_const_str.SetCString(type_name_cstr);
5502                                    break;
5503                                case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5504                                case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5505                                case DW_AT_type:        encoding_uid = form_value.Reference(dwarf_cu); break;
5506                                default:
5507                                case DW_AT_sibling:
5508                                    break;
5509                                }
5510                            }
5511                        }
5512                    }
5513
5514                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8x\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5515
5516                    switch (tag)
5517                    {
5518                    default:
5519                        break;
5520
5521                    case DW_TAG_unspecified_type:
5522                        if (strcmp(type_name_cstr, "nullptr_t") == 0)
5523                        {
5524                            resolve_state = Type::eResolveStateFull;
5525                            clang_type = ast.getASTContext()->NullPtrTy.getAsOpaquePtr();
5526                            break;
5527                        }
5528                        // Fall through to base type below in case we can handle the type there...
5529
5530                    case DW_TAG_base_type:
5531                        resolve_state = Type::eResolveStateFull;
5532                        clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5533                                                                                   encoding,
5534                                                                                   byte_size * 8);
5535                        break;
5536
5537                    case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5538                    case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5539                    case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5540                    case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5541                    case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5542                    case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5543                    case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5544                    }
5545
5546                    if (clang_type == NULL && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5547                    {
5548                        bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5549
5550                        if (translation_unit_is_objc)
5551                        {
5552                            if (type_name_cstr != NULL)
5553                            {
5554                                static ConstString g_objc_type_name_id("id");
5555                                static ConstString g_objc_type_name_Class("Class");
5556                                static ConstString g_objc_type_name_selector("SEL");
5557
5558                                if (type_name_const_str == g_objc_type_name_id)
5559                                {
5560                                    if (log)
5561                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5562                                                                                  die->GetOffset(),
5563                                                                                  DW_TAG_value_to_name(die->Tag()),
5564                                                                                  die->GetName(this, dwarf_cu));
5565                                    clang_type = ast.GetBuiltInType_objc_id();
5566                                    encoding_data_type = Type::eEncodingIsUID;
5567                                    encoding_uid = LLDB_INVALID_UID;
5568                                    resolve_state = Type::eResolveStateFull;
5569
5570                                }
5571                                else if (type_name_const_str == g_objc_type_name_Class)
5572                                {
5573                                    if (log)
5574                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5575                                                                                  die->GetOffset(),
5576                                                                                  DW_TAG_value_to_name(die->Tag()),
5577                                                                                  die->GetName(this, dwarf_cu));
5578                                    clang_type = ast.GetBuiltInType_objc_Class();
5579                                    encoding_data_type = Type::eEncodingIsUID;
5580                                    encoding_uid = LLDB_INVALID_UID;
5581                                    resolve_state = Type::eResolveStateFull;
5582                                }
5583                                else if (type_name_const_str == g_objc_type_name_selector)
5584                                {
5585                                    if (log)
5586                                        GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5587                                                                                  die->GetOffset(),
5588                                                                                  DW_TAG_value_to_name(die->Tag()),
5589                                                                                  die->GetName(this, dwarf_cu));
5590                                    clang_type = ast.GetBuiltInType_objc_selector();
5591                                    encoding_data_type = Type::eEncodingIsUID;
5592                                    encoding_uid = LLDB_INVALID_UID;
5593                                    resolve_state = Type::eResolveStateFull;
5594                                }
5595                            }
5596                            else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5597                            {
5598                                // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5599
5600                                DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5601
5602                                if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5603                                {
5604                                    if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5605                                    {
5606                                        if (!strcmp(struct_name, "objc_object"))
5607                                        {
5608                                            if (log)
5609                                                GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5610                                                                                          die->GetOffset(),
5611                                                                                          DW_TAG_value_to_name(die->Tag()),
5612                                                                                          die->GetName(this, dwarf_cu));
5613                                            clang_type = ast.GetBuiltInType_objc_id();
5614                                            encoding_data_type = Type::eEncodingIsUID;
5615                                            encoding_uid = LLDB_INVALID_UID;
5616                                            resolve_state = Type::eResolveStateFull;
5617                                        }
5618                                    }
5619                                }
5620                            }
5621                        }
5622                    }
5623
5624                    type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5625                                             this,
5626                                             type_name_const_str,
5627                                             byte_size,
5628                                             NULL,
5629                                             encoding_uid,
5630                                             encoding_data_type,
5631                                             &decl,
5632                                             clang_type,
5633                                             resolve_state));
5634
5635                    m_die_to_type[die] = type_sp.get();
5636
5637//                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5638//                  if (encoding_type != NULL)
5639//                  {
5640//                      if (encoding_type != DIE_IS_BEING_PARSED)
5641//                          type_sp->SetEncodingType(encoding_type);
5642//                      else
5643//                          m_indirect_fixups.push_back(type_sp.get());
5644//                  }
5645                }
5646                break;
5647
5648            case DW_TAG_structure_type:
5649            case DW_TAG_union_type:
5650            case DW_TAG_class_type:
5651                {
5652                    // Set a bit that lets us know that we are currently parsing this
5653                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
5654                    bool byte_size_valid = false;
5655
5656                    LanguageType class_language = eLanguageTypeUnknown;
5657                    bool is_complete_objc_class = false;
5658                    //bool struct_is_class = false;
5659                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5660                    if (num_attributes > 0)
5661                    {
5662                        uint32_t i;
5663                        for (i=0; i<num_attributes; ++i)
5664                        {
5665                            attr = attributes.AttributeAtIndex(i);
5666                            DWARFFormValue form_value;
5667                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5668                            {
5669                                switch (attr)
5670                                {
5671                                case DW_AT_decl_file:
5672                                    if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
5673									{
5674										// llvm-gcc outputs invalid DW_AT_decl_file attributes that always
5675										// point to the compile unit file, so we clear this invalid value
5676										// so that we can still unique types efficiently.
5677                                        decl.SetFile(FileSpec ("<invalid>", false));
5678									}
5679                                    else
5680                                        decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
5681                                    break;
5682
5683                                case DW_AT_decl_line:
5684                                    decl.SetLine(form_value.Unsigned());
5685                                    break;
5686
5687                                case DW_AT_decl_column:
5688                                    decl.SetColumn(form_value.Unsigned());
5689                                    break;
5690
5691                                case DW_AT_name:
5692                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
5693                                    type_name_const_str.SetCString(type_name_cstr);
5694                                    break;
5695
5696                                case DW_AT_byte_size:
5697                                    byte_size = form_value.Unsigned();
5698                                    byte_size_valid = true;
5699                                    break;
5700
5701                                case DW_AT_accessibility:
5702                                    accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
5703                                    break;
5704
5705                                case DW_AT_declaration:
5706                                    is_forward_declaration = form_value.Boolean();
5707                                    break;
5708
5709                                case DW_AT_APPLE_runtime_class:
5710                                    class_language = (LanguageType)form_value.Signed();
5711                                    break;
5712
5713                                case DW_AT_APPLE_objc_complete_type:
5714                                    is_complete_objc_class = form_value.Signed();
5715                                    break;
5716
5717                                case DW_AT_allocated:
5718                                case DW_AT_associated:
5719                                case DW_AT_data_location:
5720                                case DW_AT_description:
5721                                case DW_AT_start_scope:
5722                                case DW_AT_visibility:
5723                                default:
5724                                case DW_AT_sibling:
5725                                    break;
5726                                }
5727                            }
5728                        }
5729                    }
5730
5731                    UniqueDWARFASTType unique_ast_entry;
5732
5733                    // Only try and unique the type if it has a name.
5734                    if (type_name_const_str &&
5735                        GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
5736                                                         this,
5737                                                         dwarf_cu,
5738                                                         die,
5739                                                         decl,
5740                                                         byte_size_valid ? byte_size : -1,
5741                                                         unique_ast_entry))
5742                    {
5743                        // We have already parsed this type or from another
5744                        // compile unit. GCC loves to use the "one definition
5745                        // rule" which can result in multiple definitions
5746                        // of the same class over and over in each compile
5747                        // unit.
5748                        type_sp = unique_ast_entry.m_type_sp;
5749                        if (type_sp)
5750                        {
5751                            m_die_to_type[die] = type_sp.get();
5752                            return type_sp;
5753                        }
5754                    }
5755
5756                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
5757
5758                    int tag_decl_kind = -1;
5759                    AccessType default_accessibility = eAccessNone;
5760                    if (tag == DW_TAG_structure_type)
5761                    {
5762                        tag_decl_kind = clang::TTK_Struct;
5763                        default_accessibility = eAccessPublic;
5764                    }
5765                    else if (tag == DW_TAG_union_type)
5766                    {
5767                        tag_decl_kind = clang::TTK_Union;
5768                        default_accessibility = eAccessPublic;
5769                    }
5770                    else if (tag == DW_TAG_class_type)
5771                    {
5772                        tag_decl_kind = clang::TTK_Class;
5773                        default_accessibility = eAccessPrivate;
5774                    }
5775
5776                    if (byte_size_valid && byte_size == 0 && type_name_cstr &&
5777                        die->HasChildren() == false &&
5778                        sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
5779                    {
5780                        // Work around an issue with clang at the moment where
5781                        // forward declarations for objective C classes are emitted
5782                        // as:
5783                        //  DW_TAG_structure_type [2]
5784                        //  DW_AT_name( "ForwardObjcClass" )
5785                        //  DW_AT_byte_size( 0x00 )
5786                        //  DW_AT_decl_file( "..." )
5787                        //  DW_AT_decl_line( 1 )
5788                        //
5789                        // Note that there is no DW_AT_declaration and there are
5790                        // no children, and the byte size is zero.
5791                        is_forward_declaration = true;
5792                    }
5793
5794                    if (class_language == eLanguageTypeObjC ||
5795                        class_language == eLanguageTypeObjC_plus_plus)
5796                    {
5797                        if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
5798                        {
5799                            // We have a valid eSymbolTypeObjCClass class symbol whose
5800                            // name matches the current objective C class that we
5801                            // are trying to find and this DIE isn't the complete
5802                            // definition (we checked is_complete_objc_class above and
5803                            // know it is false), so the real definition is in here somewhere
5804                            type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
5805
5806                            if (!type_sp && GetDebugMapSymfile ())
5807                            {
5808                                // We weren't able to find a full declaration in
5809                                // this DWARF, see if we have a declaration anywhere
5810                                // else...
5811                                type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
5812                            }
5813
5814                            if (type_sp)
5815                            {
5816                                if (log)
5817                                {
5818                                    GetObjectFile()->GetModule()->LogMessage (log,
5819                                                                              "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
5820                                                                              this,
5821                                                                              die->GetOffset(),
5822                                                                              DW_TAG_value_to_name(tag),
5823                                                                              type_name_cstr,
5824                                                                              type_sp->GetID());
5825                                }
5826
5827                                // We found a real definition for this type elsewhere
5828                                // so lets use it and cache the fact that we found
5829                                // a complete type for this die
5830                                m_die_to_type[die] = type_sp.get();
5831                                return type_sp;
5832                            }
5833                        }
5834                    }
5835
5836
5837                    if (is_forward_declaration)
5838                    {
5839                        // We have a forward declaration to a type and we need
5840                        // to try and find a full declaration. We look in the
5841                        // current type index just in case we have a forward
5842                        // declaration followed by an actual declarations in the
5843                        // DWARF. If this fails, we need to look elsewhere...
5844                        if (log)
5845                        {
5846                            GetObjectFile()->GetModule()->LogMessage (log,
5847                                                                      "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
5848                                                                      this,
5849                                                                      die->GetOffset(),
5850                                                                      DW_TAG_value_to_name(tag),
5851                                                                      type_name_cstr);
5852                        }
5853
5854                        DWARFDeclContext die_decl_ctx;
5855                        die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
5856
5857                        //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
5858                        type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
5859
5860                        if (!type_sp && GetDebugMapSymfile ())
5861                        {
5862                            // We weren't able to find a full declaration in
5863                            // this DWARF, see if we have a declaration anywhere
5864                            // else...
5865                            type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
5866                        }
5867
5868                        if (type_sp)
5869                        {
5870                            if (log)
5871                            {
5872                                GetObjectFile()->GetModule()->LogMessage (log,
5873                                                                          "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
5874                                                                          this,
5875                                                                          die->GetOffset(),
5876                                                                          DW_TAG_value_to_name(tag),
5877                                                                          type_name_cstr,
5878                                                                          type_sp->GetID());
5879                            }
5880
5881                            // We found a real definition for this type elsewhere
5882                            // so lets use it and cache the fact that we found
5883                            // a complete type for this die
5884                            m_die_to_type[die] = type_sp.get();
5885                            return type_sp;
5886                        }
5887                    }
5888                    assert (tag_decl_kind != -1);
5889                    bool clang_type_was_created = false;
5890                    clang_type = m_forward_decl_die_to_clang_type.lookup (die);
5891                    if (clang_type == NULL)
5892                    {
5893                        const DWARFDebugInfoEntry *decl_ctx_die;
5894
5895                        clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
5896                        if (accessibility == eAccessNone && decl_ctx)
5897                        {
5898                            // Check the decl context that contains this class/struct/union.
5899                            // If it is a class we must give it an accessability.
5900                            const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
5901                            if (DeclKindIsCXXClass (containing_decl_kind))
5902                                accessibility = default_accessibility;
5903                        }
5904
5905                        ClangASTMetadata metadata;
5906                        metadata.SetUserID(MakeUserID(die->GetOffset()));
5907                        metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
5908
5909                        if (type_name_cstr && strchr (type_name_cstr, '<'))
5910                        {
5911                            ClangASTContext::TemplateParameterInfos template_param_infos;
5912                            if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
5913                            {
5914                                clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
5915                                                                                                        accessibility,
5916                                                                                                        type_name_cstr,
5917                                                                                                        tag_decl_kind,
5918                                                                                                        template_param_infos);
5919
5920                                clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
5921                                                                                                                                               class_template_decl,
5922                                                                                                                                               tag_decl_kind,
5923                                                                                                                                               template_param_infos);
5924                                clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
5925                                clang_type_was_created = true;
5926
5927                                GetClangASTContext().SetMetadata (class_template_decl, metadata);
5928                                GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
5929                            }
5930                        }
5931
5932                        if (!clang_type_was_created)
5933                        {
5934                            clang_type_was_created = true;
5935                            clang_type = ast.CreateRecordType (decl_ctx,
5936                                                               accessibility,
5937                                                               type_name_cstr,
5938                                                               tag_decl_kind,
5939                                                               class_language,
5940                                                               &metadata);
5941                        }
5942                    }
5943
5944                    // Store a forward declaration to this class type in case any
5945                    // parameters in any class methods need it for the clang
5946                    // types for function prototypes.
5947                    LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die);
5948                    type_sp.reset (new Type (MakeUserID(die->GetOffset()),
5949                                             this,
5950                                             type_name_const_str,
5951                                             byte_size,
5952                                             NULL,
5953                                             LLDB_INVALID_UID,
5954                                             Type::eEncodingIsUID,
5955                                             &decl,
5956                                             clang_type,
5957                                             Type::eResolveStateForward));
5958
5959                    type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
5960
5961
5962                    // Add our type to the unique type map so we don't
5963                    // end up creating many copies of the same type over
5964                    // and over in the ASTContext for our module
5965                    unique_ast_entry.m_type_sp = type_sp;
5966                    unique_ast_entry.m_symfile = this;
5967                    unique_ast_entry.m_cu = dwarf_cu;
5968                    unique_ast_entry.m_die = die;
5969                    unique_ast_entry.m_declaration = decl;
5970                    unique_ast_entry.m_byte_size = byte_size;
5971                    GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
5972                                                       unique_ast_entry);
5973
5974                    if (!is_forward_declaration)
5975                    {
5976                        // Always start the definition for a class type so that
5977                        // if the class has child classes or types that require
5978                        // the class to be created for use as their decl contexts
5979                        // the class will be ready to accept these child definitions.
5980                        if (die->HasChildren() == false)
5981                        {
5982                            // No children for this struct/union/class, lets finish it
5983                            ast.StartTagDeclarationDefinition (clang_type);
5984                            ast.CompleteTagDeclarationDefinition (clang_type);
5985
5986                            if (tag == DW_TAG_structure_type) // this only applies in C
5987                            {
5988                                clang::QualType qual_type = clang::QualType::getFromOpaquePtr (clang_type);
5989                                const clang::RecordType *record_type = qual_type->getAs<clang::RecordType> ();
5990
5991                                if (record_type)
5992                                {
5993                                    clang::RecordDecl *record_decl = record_type->getDecl();
5994
5995                                    if (record_decl)
5996                                    {
5997                                        LayoutInfo layout_info;
5998
5999                                        layout_info.alignment = 0;
6000                                        layout_info.bit_size = 0;
6001
6002                                        m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
6003                                    }
6004                                }
6005                            }
6006                        }
6007                        else if (clang_type_was_created)
6008                        {
6009                            // Start the definition if the class is not objective C since
6010                            // the underlying decls respond to isCompleteDefinition(). Objective
6011                            // C decls dont' respond to isCompleteDefinition() so we can't
6012                            // start the declaration definition right away. For C++ classs/union/structs
6013                            // we want to start the definition in case the class is needed as the
6014                            // declaration context for a contained class or type without the need
6015                            // to complete that type..
6016
6017                            if (class_language != eLanguageTypeObjC &&
6018                                class_language != eLanguageTypeObjC_plus_plus)
6019                                ast.StartTagDeclarationDefinition (clang_type);
6020
6021                            // Leave this as a forward declaration until we need
6022                            // to know the details of the type. lldb_private::Type
6023                            // will automatically call the SymbolFile virtual function
6024                            // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6025                            // When the definition needs to be defined.
6026                            m_forward_decl_die_to_clang_type[die] = clang_type;
6027                            m_forward_decl_clang_type_to_die[ClangASTType::RemoveFastQualifiers (clang_type)] = die;
6028                            ClangASTContext::SetHasExternalStorage (clang_type, true);
6029                        }
6030                    }
6031
6032                }
6033                break;
6034
6035            case DW_TAG_enumeration_type:
6036                {
6037                    // Set a bit that lets us know that we are currently parsing this
6038                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6039
6040                    lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6041
6042                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6043                    if (num_attributes > 0)
6044                    {
6045                        uint32_t i;
6046
6047                        for (i=0; i<num_attributes; ++i)
6048                        {
6049                            attr = attributes.AttributeAtIndex(i);
6050                            DWARFFormValue form_value;
6051                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6052                            {
6053                                switch (attr)
6054                                {
6055                                case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6056                                case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6057                                case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6058                                case DW_AT_name:
6059                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6060                                    type_name_const_str.SetCString(type_name_cstr);
6061                                    break;
6062                                case DW_AT_type:            encoding_uid = form_value.Reference(dwarf_cu); break;
6063                                case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6064                                case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6065                                case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6066                                case DW_AT_allocated:
6067                                case DW_AT_associated:
6068                                case DW_AT_bit_stride:
6069                                case DW_AT_byte_stride:
6070                                case DW_AT_data_location:
6071                                case DW_AT_description:
6072                                case DW_AT_start_scope:
6073                                case DW_AT_visibility:
6074                                case DW_AT_specification:
6075                                case DW_AT_abstract_origin:
6076                                case DW_AT_sibling:
6077                                    break;
6078                                }
6079                            }
6080                        }
6081
6082                        DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6083
6084                        clang_type_t enumerator_clang_type = NULL;
6085                        clang_type = m_forward_decl_die_to_clang_type.lookup (die);
6086                        if (clang_type == NULL)
6087                        {
6088                            if (encoding_uid != DW_INVALID_OFFSET)
6089                            {
6090                                Type *enumerator_type = ResolveTypeUID(encoding_uid);
6091                                if (enumerator_type)
6092                                    enumerator_clang_type = enumerator_type->GetClangFullType();
6093                            }
6094
6095                            if (enumerator_clang_type == NULL)
6096                                enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6097                                                                                                      DW_ATE_signed,
6098                                                                                                      byte_size * 8);
6099
6100                            clang_type = ast.CreateEnumerationType (type_name_cstr,
6101                                                                    GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6102                                                                    decl,
6103                                                                    enumerator_clang_type);
6104                        }
6105                        else
6106                        {
6107                            enumerator_clang_type = ClangASTContext::GetEnumerationIntegerType (clang_type);
6108                        }
6109
6110                        LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die);
6111
6112                        type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6113                                                 this,
6114                                                 type_name_const_str,
6115                                                 byte_size,
6116                                                 NULL,
6117                                                 encoding_uid,
6118                                                 Type::eEncodingIsUID,
6119                                                 &decl,
6120                                                 clang_type,
6121                                                 Type::eResolveStateForward));
6122
6123                        ast.StartTagDeclarationDefinition (clang_type);
6124                        if (die->HasChildren())
6125                        {
6126                            SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6127                            bool is_signed = false;
6128                            ast.IsIntegerType(enumerator_clang_type, is_signed);
6129                            ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6130                        }
6131                        ast.CompleteTagDeclarationDefinition (clang_type);
6132                    }
6133                }
6134                break;
6135
6136            case DW_TAG_inlined_subroutine:
6137            case DW_TAG_subprogram:
6138            case DW_TAG_subroutine_type:
6139                {
6140                    // Set a bit that lets us know that we are currently parsing this
6141                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6142
6143                    //const char *mangled = NULL;
6144                    dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6145                    bool is_variadic = false;
6146                    bool is_inline = false;
6147                    bool is_static = false;
6148                    bool is_virtual = false;
6149                    bool is_explicit = false;
6150                    bool is_artificial = false;
6151                    dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6152                    dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6153                    dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6154
6155                    unsigned type_quals = 0;
6156                    clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6157
6158
6159                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6160                    if (num_attributes > 0)
6161                    {
6162                        uint32_t i;
6163                        for (i=0; i<num_attributes; ++i)
6164                        {
6165                            attr = attributes.AttributeAtIndex(i);
6166                            DWARFFormValue form_value;
6167                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6168                            {
6169                                switch (attr)
6170                                {
6171                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6172                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6173                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6174                                case DW_AT_name:
6175                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6176                                    type_name_const_str.SetCString(type_name_cstr);
6177                                    break;
6178
6179                                case DW_AT_linkage_name:
6180                                case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6181                                case DW_AT_type:                type_die_offset = form_value.Reference(dwarf_cu); break;
6182                                case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6183                                case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6184                                case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6185                                case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6186                                case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6187                                case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6188
6189
6190                                case DW_AT_external:
6191                                    if (form_value.Unsigned())
6192                                    {
6193                                        if (storage == clang::SC_None)
6194                                            storage = clang::SC_Extern;
6195                                        else
6196                                            storage = clang::SC_PrivateExtern;
6197                                    }
6198                                    break;
6199
6200                                case DW_AT_specification:
6201                                    specification_die_offset = form_value.Reference(dwarf_cu);
6202                                    break;
6203
6204                                case DW_AT_abstract_origin:
6205                                    abstract_origin_die_offset = form_value.Reference(dwarf_cu);
6206                                    break;
6207
6208                                case DW_AT_object_pointer:
6209                                    object_pointer_die_offset = form_value.Reference(dwarf_cu);
6210                                    break;
6211
6212                                case DW_AT_allocated:
6213                                case DW_AT_associated:
6214                                case DW_AT_address_class:
6215                                case DW_AT_calling_convention:
6216                                case DW_AT_data_location:
6217                                case DW_AT_elemental:
6218                                case DW_AT_entry_pc:
6219                                case DW_AT_frame_base:
6220                                case DW_AT_high_pc:
6221                                case DW_AT_low_pc:
6222                                case DW_AT_prototyped:
6223                                case DW_AT_pure:
6224                                case DW_AT_ranges:
6225                                case DW_AT_recursive:
6226                                case DW_AT_return_addr:
6227                                case DW_AT_segment:
6228                                case DW_AT_start_scope:
6229                                case DW_AT_static_link:
6230                                case DW_AT_trampoline:
6231                                case DW_AT_visibility:
6232                                case DW_AT_vtable_elem_location:
6233                                case DW_AT_description:
6234                                case DW_AT_sibling:
6235                                    break;
6236                                }
6237                            }
6238                        }
6239                    }
6240
6241                    std::string object_pointer_name;
6242                    if (object_pointer_die_offset != DW_INVALID_OFFSET)
6243                    {
6244                        // Get the name from the object pointer die
6245                        StreamString s;
6246                        if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6247                        {
6248                            object_pointer_name.assign(s.GetData());
6249                        }
6250                    }
6251
6252                    DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6253
6254                    clang_type_t return_clang_type = NULL;
6255                    Type *func_type = NULL;
6256
6257                    if (type_die_offset != DW_INVALID_OFFSET)
6258                        func_type = ResolveTypeUID(type_die_offset);
6259
6260                    if (func_type)
6261                        return_clang_type = func_type->GetClangForwardType();
6262                    else
6263                        return_clang_type = ast.GetBuiltInType_void();
6264
6265
6266                    std::vector<clang_type_t> function_param_types;
6267                    std::vector<clang::ParmVarDecl*> function_param_decls;
6268
6269                    // Parse the function children for the parameters
6270
6271                    const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6272                    clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6273                    const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6274
6275                    const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6276                    // Start off static. This will be set to false in ParseChildParameters(...)
6277                    // if we find a "this" paramters as the first parameter
6278                    if (is_cxx_method)
6279                        is_static = true;
6280                    ClangASTContext::TemplateParameterInfos template_param_infos;
6281
6282                    if (die->HasChildren())
6283                    {
6284                        bool skip_artificial = true;
6285                        ParseChildParameters (sc,
6286                                              containing_decl_ctx,
6287                                              dwarf_cu,
6288                                              die,
6289                                              skip_artificial,
6290                                              is_static,
6291                                              type_list,
6292                                              function_param_types,
6293                                              function_param_decls,
6294                                              type_quals,
6295                                              template_param_infos);
6296                    }
6297
6298                    // clang_type will get the function prototype clang type after this call
6299                    clang_type = ast.CreateFunctionType (return_clang_type,
6300                                                         function_param_types.data(),
6301                                                         function_param_types.size(),
6302                                                         is_variadic,
6303                                                         type_quals);
6304
6305                    if (type_name_cstr)
6306                    {
6307                        bool type_handled = false;
6308                        if (tag == DW_TAG_subprogram)
6309                        {
6310                            ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6311                            if (objc_method.IsValid(true))
6312                            {
6313                                SymbolContext empty_sc;
6314                                clang_type_t class_opaque_type = NULL;
6315                                ConstString class_name(objc_method.GetClassName());
6316                                if (class_name)
6317                                {
6318                                    TypeList types;
6319                                    TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6320
6321                                    if (complete_objc_class_type_sp)
6322                                    {
6323                                        clang_type_t type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6324                                        if (ClangASTContext::IsObjCClassType (type_clang_forward_type))
6325                                            class_opaque_type = type_clang_forward_type;
6326                                    }
6327                                }
6328
6329                                if (class_opaque_type)
6330                                {
6331                                    // If accessibility isn't set to anything valid, assume public for
6332                                    // now...
6333                                    if (accessibility == eAccessNone)
6334                                        accessibility = eAccessPublic;
6335
6336                                    clang::ObjCMethodDecl *objc_method_decl = ast.AddMethodToObjCObjectType (class_opaque_type,
6337                                                                                                             type_name_cstr,
6338                                                                                                             clang_type,
6339                                                                                                             accessibility,
6340                                                                                                             is_artificial);
6341                                    type_handled = objc_method_decl != NULL;
6342                                    if (type_handled)
6343                                    {
6344                                        LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6345                                        GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6346                                    }
6347                                    else
6348                                    {
6349                                        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",
6350                                                                                   die->GetOffset(),
6351                                                                                   tag,
6352                                                                                   DW_TAG_value_to_name(tag));
6353                                    }
6354                                }
6355                            }
6356                            else if (is_cxx_method)
6357                            {
6358                                // Look at the parent of this DIE and see if is is
6359                                // a class or struct and see if this is actually a
6360                                // C++ method
6361                                Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6362                                if (class_type)
6363                                {
6364                                    if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6365                                    {
6366                                        // We uniqued the parent class of this function to another class
6367                                        // so we now need to associate all dies under "decl_ctx_die" to
6368                                        // DIEs in the DIE for "class_type"...
6369                                        SymbolFileDWARF *class_symfile = NULL;
6370                                        DWARFCompileUnitSP class_type_cu_sp;
6371                                        const DWARFDebugInfoEntry *class_type_die = NULL;
6372
6373                                        SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6374                                        if (debug_map_symfile)
6375                                        {
6376                                            class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6377                                            class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6378                                        }
6379                                        else
6380                                        {
6381                                            class_symfile = this;
6382                                            class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6383                                        }
6384                                        if (class_type_die)
6385                                        {
6386                                            llvm::SmallVector<const DWARFDebugInfoEntry *, 0> failures;
6387
6388                                            CopyUniqueClassMethodTypes (class_symfile,
6389                                                                        class_type,
6390                                                                        class_type_cu_sp.get(),
6391                                                                        class_type_die,
6392                                                                        dwarf_cu,
6393                                                                        decl_ctx_die,
6394                                                                        failures);
6395
6396                                            // FIXME do something with these failures that's smarter than
6397                                            // just dropping them on the ground.  Unfortunately classes don't
6398                                            // like having stuff added to them after their definitions are
6399                                            // complete...
6400
6401                                            type_ptr = m_die_to_type[die];
6402                                            if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6403                                            {
6404                                                type_sp = type_ptr->shared_from_this();
6405                                                break;
6406                                            }
6407                                        }
6408                                    }
6409
6410                                    if (specification_die_offset != DW_INVALID_OFFSET)
6411                                    {
6412                                        // We have a specification which we are going to base our function
6413                                        // prototype off of, so we need this type to be completed so that the
6414                                        // m_die_to_decl_ctx for the method in the specification has a valid
6415                                        // clang decl context.
6416                                        class_type->GetClangForwardType();
6417                                        // If we have a specification, then the function type should have been
6418                                        // made with the specification and not with this die.
6419                                        DWARFCompileUnitSP spec_cu_sp;
6420                                        const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6421                                        clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6422                                        if (spec_clang_decl_ctx)
6423                                        {
6424                                            LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6425                                        }
6426                                        else
6427                                        {
6428                                            GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6429                                                                                         MakeUserID(die->GetOffset()),
6430                                                                                         specification_die_offset);
6431                                        }
6432                                        type_handled = true;
6433                                    }
6434                                    else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6435                                    {
6436                                        // We have a specification which we are going to base our function
6437                                        // prototype off of, so we need this type to be completed so that the
6438                                        // m_die_to_decl_ctx for the method in the abstract origin has a valid
6439                                        // clang decl context.
6440                                        class_type->GetClangForwardType();
6441
6442                                        DWARFCompileUnitSP abs_cu_sp;
6443                                        const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6444                                        clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6445                                        if (abs_clang_decl_ctx)
6446                                        {
6447                                            LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6448                                        }
6449                                        else
6450                                        {
6451                                            GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6452                                                                                         MakeUserID(die->GetOffset()),
6453                                                                                         abstract_origin_die_offset);
6454                                        }
6455                                        type_handled = true;
6456                                    }
6457                                    else
6458                                    {
6459                                        clang_type_t class_opaque_type = class_type->GetClangForwardType();
6460                                        if (ClangASTContext::IsCXXClassType (class_opaque_type))
6461                                        {
6462                                            if (ClangASTContext::IsBeingDefined (class_opaque_type))
6463                                            {
6464                                                // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6465                                                // in the DWARF for C++ methods... Default to public for now...
6466                                                if (accessibility == eAccessNone)
6467                                                    accessibility = eAccessPublic;
6468
6469                                                if (!is_static && !die->HasChildren())
6470                                                {
6471                                                    // We have a C++ member function with no children (this pointer!)
6472                                                    // and clang will get mad if we try and make a function that isn't
6473                                                    // well formed in the DWARF, so we will just skip it...
6474                                                    type_handled = true;
6475                                                }
6476                                                else
6477                                                {
6478                                                    clang::CXXMethodDecl *cxx_method_decl;
6479                                                    // REMOVE THE CRASH DESCRIPTION BELOW
6480                                                    Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6481                                                                                         type_name_cstr,
6482                                                                                         class_type->GetName().GetCString(),
6483                                                                                         MakeUserID(die->GetOffset()),
6484                                                                                         m_obj_file->GetFileSpec().GetPath().c_str());
6485
6486                                                    const bool is_attr_used = false;
6487
6488                                                    cxx_method_decl = ast.AddMethodToCXXRecordType (class_opaque_type,
6489                                                                                                    type_name_cstr,
6490                                                                                                    clang_type,
6491                                                                                                    accessibility,
6492                                                                                                    is_virtual,
6493                                                                                                    is_static,
6494                                                                                                    is_inline,
6495                                                                                                    is_explicit,
6496                                                                                                    is_attr_used,
6497                                                                                                    is_artificial);
6498
6499                                                    type_handled = cxx_method_decl != NULL;
6500
6501                                                    if (type_handled)
6502                                                    {
6503                                                        LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6504
6505                                                        Host::SetCrashDescription (NULL);
6506
6507
6508                                                        ClangASTMetadata metadata;
6509                                                        metadata.SetUserID(MakeUserID(die->GetOffset()));
6510
6511                                                        if (!object_pointer_name.empty())
6512                                                        {
6513                                                            metadata.SetObjectPtrName(object_pointer_name.c_str());
6514                                                            if (log)
6515                                                                log->Printf ("Setting object pointer name: %s on method object %p.\n",
6516                                                                             object_pointer_name.c_str(),
6517                                                                             cxx_method_decl);
6518                                                        }
6519                                                        GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6520                                                    }
6521                                                    else
6522                                                    {
6523                                                        return TypeSP();
6524                                                    }
6525                                                }
6526                                            }
6527                                            else
6528                                            {
6529                                                // We were asked to parse the type for a method in a class, yet the
6530                                                // class hasn't been asked to complete itself through the
6531                                                // clang::ExternalASTSource protocol, so we need to just have the
6532                                                // class complete itself and do things the right way, then our
6533                                                // DIE should then have an entry in the m_die_to_type map. First
6534                                                // we need to modify the m_die_to_type so it doesn't think we are
6535                                                // trying to parse this DIE anymore...
6536                                                m_die_to_type[die] = NULL;
6537
6538                                                // Now we get the full type to force our class type to complete itself
6539                                                // using the clang::ExternalASTSource protocol which will parse all
6540                                                // base classes and all methods (including the method for this DIE).
6541                                                class_type->GetClangFullType();
6542
6543                                                // The type for this DIE should have been filled in the function call above
6544                                                type_ptr = m_die_to_type[die];
6545                                                if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6546                                                {
6547                                                    type_sp = type_ptr->shared_from_this();
6548                                                    break;
6549                                                }
6550
6551                                                // FIXME This is fixing some even uglier behavior but we really need to
6552                                                // uniq the methods of each class as well as the class itself.
6553                                                // <rdar://problem/11240464>
6554                                                type_handled = true;
6555                                            }
6556                                        }
6557                                    }
6558                                }
6559                            }
6560                        }
6561
6562                        if (!type_handled)
6563                        {
6564                            // We just have a function that isn't part of a class
6565                            clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (containing_decl_ctx,
6566                                                                                                type_name_cstr,
6567                                                                                                clang_type,
6568                                                                                                storage,
6569                                                                                                is_inline);
6570
6571//                            if (template_param_infos.GetSize() > 0)
6572//                            {
6573//                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6574//                                                                                                                  function_decl,
6575//                                                                                                                  type_name_cstr,
6576//                                                                                                                  template_param_infos);
6577//
6578//                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6579//                                                                              func_template_decl,
6580//                                                                              template_param_infos);
6581//                            }
6582                            // Add the decl to our DIE to decl context map
6583                            assert (function_decl);
6584                            LinkDeclContextToDIE(function_decl, die);
6585                            if (!function_param_decls.empty())
6586                                ast.SetFunctionParameters (function_decl,
6587                                                           &function_param_decls.front(),
6588                                                           function_param_decls.size());
6589
6590                            ClangASTMetadata metadata;
6591                            metadata.SetUserID(MakeUserID(die->GetOffset()));
6592
6593                            if (!object_pointer_name.empty())
6594                            {
6595                                metadata.SetObjectPtrName(object_pointer_name.c_str());
6596                                if (log)
6597                                    log->Printf ("Setting object pointer name: %s on function object %p.",
6598                                                 object_pointer_name.c_str(),
6599                                                function_decl);
6600                            }
6601                            GetClangASTContext().SetMetadata (function_decl, metadata);
6602                        }
6603                    }
6604                    type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6605                                             this,
6606                                             type_name_const_str,
6607                                             0,
6608                                             NULL,
6609                                             LLDB_INVALID_UID,
6610                                             Type::eEncodingIsUID,
6611                                             &decl,
6612                                             clang_type,
6613                                             Type::eResolveStateFull));
6614                    assert(type_sp.get());
6615                }
6616                break;
6617
6618            case DW_TAG_array_type:
6619                {
6620                    // Set a bit that lets us know that we are currently parsing this
6621                    m_die_to_type[die] = DIE_IS_BEING_PARSED;
6622
6623                    lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6624                    int64_t first_index = 0;
6625                    uint32_t byte_stride = 0;
6626                    uint32_t bit_stride = 0;
6627                    bool is_vector = false;
6628                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6629
6630                    if (num_attributes > 0)
6631                    {
6632                        uint32_t i;
6633                        for (i=0; i<num_attributes; ++i)
6634                        {
6635                            attr = attributes.AttributeAtIndex(i);
6636                            DWARFFormValue form_value;
6637                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6638                            {
6639                                switch (attr)
6640                                {
6641                                case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6642                                case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6643                                case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6644                                case DW_AT_name:
6645                                    type_name_cstr = form_value.AsCString(&get_debug_str_data());
6646                                    type_name_const_str.SetCString(type_name_cstr);
6647                                    break;
6648
6649                                case DW_AT_type:            type_die_offset = form_value.Reference(dwarf_cu); break;
6650                                case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
6651                                case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
6652                                case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
6653                                case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
6654                                case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6655                                case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
6656                                case DW_AT_allocated:
6657                                case DW_AT_associated:
6658                                case DW_AT_data_location:
6659                                case DW_AT_description:
6660                                case DW_AT_ordering:
6661                                case DW_AT_start_scope:
6662                                case DW_AT_visibility:
6663                                case DW_AT_specification:
6664                                case DW_AT_abstract_origin:
6665                                case DW_AT_sibling:
6666                                    break;
6667                                }
6668                            }
6669                        }
6670
6671                        DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6672
6673                        Type *element_type = ResolveTypeUID(type_die_offset);
6674
6675                        if (element_type)
6676                        {
6677                            std::vector<uint64_t> element_orders;
6678                            ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
6679                            if (byte_stride == 0 && bit_stride == 0)
6680                                byte_stride = element_type->GetByteSize();
6681                            clang_type_t array_element_type = element_type->GetClangForwardType();
6682                            uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
6683                            uint64_t num_elements = 0;
6684                            std::vector<uint64_t>::const_reverse_iterator pos;
6685                            std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
6686                            for (pos = element_orders.rbegin(); pos != end; ++pos)
6687                            {
6688                                num_elements = *pos;
6689                                clang_type = ast.CreateArrayType (array_element_type,
6690                                                                  num_elements,
6691                                                                  is_vector);
6692                                array_element_type = clang_type;
6693                                array_element_bit_stride = num_elements ? array_element_bit_stride * num_elements : array_element_bit_stride;
6694                            }
6695                            ConstString empty_name;
6696                            type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6697                                                     this,
6698                                                     empty_name,
6699                                                     array_element_bit_stride / 8,
6700                                                     NULL,
6701                                                     type_die_offset,
6702                                                     Type::eEncodingIsUID,
6703                                                     &decl,
6704                                                     clang_type,
6705                                                     Type::eResolveStateFull));
6706                            type_sp->SetEncodingType (element_type);
6707                        }
6708                    }
6709                }
6710                break;
6711
6712            case DW_TAG_ptr_to_member_type:
6713                {
6714                    dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6715                    dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
6716
6717                    const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6718
6719                    if (num_attributes > 0) {
6720                        uint32_t i;
6721                        for (i=0; i<num_attributes; ++i)
6722                        {
6723                            attr = attributes.AttributeAtIndex(i);
6724                            DWARFFormValue form_value;
6725                            if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6726                            {
6727                                switch (attr)
6728                                {
6729                                    case DW_AT_type:
6730                                        type_die_offset = form_value.Reference(dwarf_cu); break;
6731                                    case DW_AT_containing_type:
6732                                        containing_type_die_offset = form_value.Reference(dwarf_cu); break;
6733                                }
6734                            }
6735                        }
6736
6737                        Type *pointee_type = ResolveTypeUID(type_die_offset);
6738                        Type *class_type = ResolveTypeUID(containing_type_die_offset);
6739
6740                        clang_type_t pointee_clang_type = pointee_type->GetClangForwardType();
6741                        clang_type_t class_clang_type = class_type->GetClangLayoutType();
6742
6743                        clang_type = ast.CreateMemberPointerType(pointee_clang_type,
6744                                                                 class_clang_type);
6745
6746                        byte_size = ClangASTType::GetClangTypeBitWidth (ast.getASTContext(),
6747                                                                       clang_type) / 8;
6748
6749                        type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6750                                                 this,
6751                                                 type_name_const_str,
6752                                                 byte_size,
6753                                                 NULL,
6754                                                 LLDB_INVALID_UID,
6755                                                 Type::eEncodingIsUID,
6756                                                 NULL,
6757                                                 clang_type,
6758                                                 Type::eResolveStateForward));
6759                    }
6760
6761                    break;
6762                }
6763            default:
6764                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",
6765                                                           die->GetOffset(),
6766                                                           tag,
6767                                                           DW_TAG_value_to_name(tag));
6768                break;
6769            }
6770
6771            if (type_sp.get())
6772            {
6773                const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
6774                dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
6775
6776                SymbolContextScope * symbol_context_scope = NULL;
6777                if (sc_parent_tag == DW_TAG_compile_unit)
6778                {
6779                    symbol_context_scope = sc.comp_unit;
6780                }
6781                else if (sc.function != NULL)
6782                {
6783                    symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
6784                    if (symbol_context_scope == NULL)
6785                        symbol_context_scope = sc.function;
6786                }
6787
6788                if (symbol_context_scope != NULL)
6789                {
6790                    type_sp->SetSymbolContextScope(symbol_context_scope);
6791                }
6792
6793                // We are ready to put this type into the uniqued list up at the module level
6794                type_list->Insert (type_sp);
6795
6796                m_die_to_type[die] = type_sp.get();
6797            }
6798        }
6799        else if (type_ptr != DIE_IS_BEING_PARSED)
6800        {
6801            type_sp = type_ptr->shared_from_this();
6802        }
6803    }
6804    return type_sp;
6805}
6806
6807size_t
6808SymbolFileDWARF::ParseTypes
6809(
6810    const SymbolContext& sc,
6811    DWARFCompileUnit* dwarf_cu,
6812    const DWARFDebugInfoEntry *die,
6813    bool parse_siblings,
6814    bool parse_children
6815)
6816{
6817    size_t types_added = 0;
6818    while (die != NULL)
6819    {
6820        bool type_is_new = false;
6821        if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
6822        {
6823            if (type_is_new)
6824                ++types_added;
6825        }
6826
6827        if (parse_children && die->HasChildren())
6828        {
6829            if (die->Tag() == DW_TAG_subprogram)
6830            {
6831                SymbolContext child_sc(sc);
6832                child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
6833                types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
6834            }
6835            else
6836                types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
6837        }
6838
6839        if (parse_siblings)
6840            die = die->GetSibling();
6841        else
6842            die = NULL;
6843    }
6844    return types_added;
6845}
6846
6847
6848size_t
6849SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
6850{
6851    assert(sc.comp_unit && sc.function);
6852    size_t functions_added = 0;
6853    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
6854    if (dwarf_cu)
6855    {
6856        dw_offset_t function_die_offset = sc.function->GetID();
6857        const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
6858        if (function_die)
6859        {
6860            ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
6861        }
6862    }
6863
6864    return functions_added;
6865}
6866
6867
6868size_t
6869SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
6870{
6871    // At least a compile unit must be valid
6872    assert(sc.comp_unit);
6873    size_t types_added = 0;
6874    DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
6875    if (dwarf_cu)
6876    {
6877        if (sc.function)
6878        {
6879            dw_offset_t function_die_offset = sc.function->GetID();
6880            const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
6881            if (func_die && func_die->HasChildren())
6882            {
6883                types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
6884            }
6885        }
6886        else
6887        {
6888            const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
6889            if (dwarf_cu_die && dwarf_cu_die->HasChildren())
6890            {
6891                types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
6892            }
6893        }
6894    }
6895
6896    return types_added;
6897}
6898
6899size_t
6900SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
6901{
6902    if (sc.comp_unit != NULL)
6903    {
6904        DWARFDebugInfo* info = DebugInfo();
6905        if (info == NULL)
6906            return 0;
6907
6908        if (sc.function)
6909        {
6910            DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
6911
6912            if (dwarf_cu == NULL)
6913                return 0;
6914
6915            const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
6916
6917            dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
6918            if (func_lo_pc != LLDB_INVALID_ADDRESS)
6919            {
6920                const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
6921
6922                // Let all blocks know they have parse all their variables
6923                sc.function->GetBlock (false).SetDidParseVariables (true, true);
6924                return num_variables;
6925            }
6926        }
6927        else if (sc.comp_unit)
6928        {
6929            DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
6930
6931            if (dwarf_cu == NULL)
6932                return 0;
6933
6934            uint32_t vars_added = 0;
6935            VariableListSP variables (sc.comp_unit->GetVariableList(false));
6936
6937            if (variables.get() == NULL)
6938            {
6939                variables.reset(new VariableList());
6940                sc.comp_unit->SetVariableList(variables);
6941
6942                DWARFCompileUnit* match_dwarf_cu = NULL;
6943                const DWARFDebugInfoEntry* die = NULL;
6944                DIEArray die_offsets;
6945                if (m_using_apple_tables)
6946                {
6947                    if (m_apple_names_ap.get())
6948                    {
6949                        DWARFMappedHash::DIEInfoArray hash_data_array;
6950                        if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
6951                                                                    dwarf_cu->GetNextCompileUnitOffset(),
6952                                                                    hash_data_array))
6953                        {
6954                            DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
6955                        }
6956                    }
6957                }
6958                else
6959                {
6960                    // Index if we already haven't to make sure the compile units
6961                    // get indexed and make their global DIE index list
6962                    if (!m_indexed)
6963                        Index ();
6964
6965                    m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
6966                                                                 dwarf_cu->GetNextCompileUnitOffset(),
6967                                                                 die_offsets);
6968                }
6969
6970                const size_t num_matches = die_offsets.size();
6971                if (num_matches)
6972                {
6973                    DWARFDebugInfo* debug_info = DebugInfo();
6974                    for (size_t i=0; i<num_matches; ++i)
6975                    {
6976                        const dw_offset_t die_offset = die_offsets[i];
6977                        die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
6978                        if (die)
6979                        {
6980                            VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
6981                            if (var_sp)
6982                            {
6983                                variables->AddVariableIfUnique (var_sp);
6984                                ++vars_added;
6985                            }
6986                        }
6987                        else
6988                        {
6989                            if (m_using_apple_tables)
6990                            {
6991                                GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
6992                            }
6993                        }
6994
6995                    }
6996                }
6997            }
6998            return vars_added;
6999        }
7000    }
7001    return 0;
7002}
7003
7004
7005VariableSP
7006SymbolFileDWARF::ParseVariableDIE
7007(
7008    const SymbolContext& sc,
7009    DWARFCompileUnit* dwarf_cu,
7010    const DWARFDebugInfoEntry *die,
7011    const lldb::addr_t func_low_pc
7012)
7013{
7014
7015    VariableSP var_sp (m_die_to_variable_sp[die]);
7016    if (var_sp)
7017        return var_sp;  // Already been parsed!
7018
7019    const dw_tag_t tag = die->Tag();
7020
7021    if ((tag == DW_TAG_variable) ||
7022        (tag == DW_TAG_constant) ||
7023        (tag == DW_TAG_formal_parameter && sc.function))
7024    {
7025        DWARFDebugInfoEntry::Attributes attributes;
7026        const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7027        if (num_attributes > 0)
7028        {
7029            const char *name = NULL;
7030            const char *mangled = NULL;
7031            Declaration decl;
7032            uint32_t i;
7033            lldb::user_id_t type_uid = LLDB_INVALID_UID;
7034            DWARFExpression location;
7035            bool is_external = false;
7036            bool is_artificial = false;
7037            bool location_is_const_value_data = false;
7038            bool has_explicit_location = false;
7039            //AccessType accessibility = eAccessNone;
7040
7041            for (i=0; i<num_attributes; ++i)
7042            {
7043                dw_attr_t attr = attributes.AttributeAtIndex(i);
7044                DWARFFormValue form_value;
7045                if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7046                {
7047                    switch (attr)
7048                    {
7049                    case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7050                    case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7051                    case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7052                    case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7053                    case DW_AT_linkage_name:
7054                    case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7055                    case DW_AT_type:        type_uid = form_value.Reference(dwarf_cu); break;
7056                    case DW_AT_external:    is_external = form_value.Boolean(); break;
7057                    case DW_AT_const_value:
7058                        // If we have already found a DW_AT_location attribute, ignore this attribute.
7059                        if (!has_explicit_location)
7060                        {
7061                            location_is_const_value_data = true;
7062                            // The constant value will be either a block, a data value or a string.
7063                            const DataExtractor& debug_info_data = get_debug_info_data();
7064                            if (DWARFFormValue::IsBlockForm(form_value.Form()))
7065                            {
7066                                // Retrieve the value as a block expression.
7067                                uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7068                                uint32_t block_length = form_value.Unsigned();
7069                                location.CopyOpcodeData(debug_info_data, block_offset, block_length);
7070                            }
7071                            else if (DWARFFormValue::IsDataForm(form_value.Form()))
7072                            {
7073                                // Retrieve the value as a data expression.
7074                                const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7075                                uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7076                                uint32_t data_length = fixed_form_sizes[form_value.Form()];
7077                                location.CopyOpcodeData(debug_info_data, data_offset, data_length);
7078                            }
7079                            else
7080                            {
7081                                // Retrieve the value as a string expression.
7082                                if (form_value.Form() == DW_FORM_strp)
7083                                {
7084                                    const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7085                                    uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7086                                    uint32_t data_length = fixed_form_sizes[form_value.Form()];
7087                                    location.CopyOpcodeData(debug_info_data, data_offset, data_length);
7088                                }
7089                                else
7090                                {
7091                                    const char *str = form_value.AsCString(&debug_info_data);
7092                                    uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7093                                    uint32_t string_length = strlen(str) + 1;
7094                                    location.CopyOpcodeData(debug_info_data, string_offset, string_length);
7095                                }
7096                            }
7097                        }
7098                        break;
7099                    case DW_AT_location:
7100                        {
7101                            location_is_const_value_data = false;
7102                            has_explicit_location = true;
7103                            if (form_value.BlockData())
7104                            {
7105                                const DataExtractor& debug_info_data = get_debug_info_data();
7106
7107                                uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7108                                uint32_t block_length = form_value.Unsigned();
7109                                location.CopyOpcodeData(get_debug_info_data(), block_offset, block_length);
7110                            }
7111                            else
7112                            {
7113                                const DataExtractor&    debug_loc_data = get_debug_loc_data();
7114                                const dw_offset_t debug_loc_offset = form_value.Unsigned();
7115
7116                                size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7117                                if (loc_list_length > 0)
7118                                {
7119                                    location.CopyOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length);
7120                                    assert (func_low_pc != LLDB_INVALID_ADDRESS);
7121                                    location.SetLocationListSlide (func_low_pc - dwarf_cu->GetBaseAddress());
7122                                }
7123                            }
7124                        }
7125                        break;
7126
7127                    case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7128                    case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7129                    case DW_AT_declaration:
7130                    case DW_AT_description:
7131                    case DW_AT_endianity:
7132                    case DW_AT_segment:
7133                    case DW_AT_start_scope:
7134                    case DW_AT_visibility:
7135                    default:
7136                    case DW_AT_abstract_origin:
7137                    case DW_AT_sibling:
7138                    case DW_AT_specification:
7139                        break;
7140                    }
7141                }
7142            }
7143
7144            if (location.IsValid())
7145            {
7146                ValueType scope = eValueTypeInvalid;
7147
7148                const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7149                dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7150                SymbolContextScope * symbol_context_scope = NULL;
7151
7152                // DWARF doesn't specify if a DW_TAG_variable is a local, global
7153                // or static variable, so we have to do a little digging by
7154                // looking at the location of a varaible to see if it contains
7155                // a DW_OP_addr opcode _somewhere_ in the definition. I say
7156                // somewhere because clang likes to combine small global variables
7157                // into the same symbol and have locations like:
7158                // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7159                // So if we don't have a DW_TAG_formal_parameter, we can look at
7160                // the location to see if it contains a DW_OP_addr opcode, and
7161                // then we can correctly classify  our variables.
7162                if (tag == DW_TAG_formal_parameter)
7163                    scope = eValueTypeVariableArgument;
7164                else
7165                {
7166                    bool op_error = false;
7167                    // Check if the location has a DW_OP_addr with any address value...
7168                    lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7169                    if (!location_is_const_value_data)
7170                    {
7171                        location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7172                        if (op_error)
7173                        {
7174                            StreamString strm;
7175                            location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7176                            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());
7177                        }
7178                    }
7179
7180                    if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7181                    {
7182                        if (is_external)
7183                            scope = eValueTypeVariableGlobal;
7184                        else
7185                            scope = eValueTypeVariableStatic;
7186
7187
7188                        SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7189
7190                        if (debug_map_symfile)
7191                        {
7192                            // When leaving the DWARF in the .o files on darwin,
7193                            // when we have a global variable that wasn't initialized,
7194                            // the .o file might not have allocated a virtual
7195                            // address for the global variable. In this case it will
7196                            // have created a symbol for the global variable
7197                            // that is undefined/data and external and the value will
7198                            // be the byte size of the variable. When we do the
7199                            // address map in SymbolFileDWARFDebugMap we rely on
7200                            // having an address, we need to do some magic here
7201                            // so we can get the correct address for our global
7202                            // variable. The address for all of these entries
7203                            // will be zero, and there will be an undefined symbol
7204                            // in this object file, and the executable will have
7205                            // a matching symbol with a good address. So here we
7206                            // dig up the correct address and replace it in the
7207                            // location for the variable, and set the variable's
7208                            // symbol context scope to be that of the main executable
7209                            // so the file address will resolve correctly.
7210                            bool linked_oso_file_addr = false;
7211                            if (is_external && location_DW_OP_addr == 0)
7212                            {
7213
7214                                // we have a possible uninitialized extern global
7215                                ConstString const_name(mangled ? mangled : name);
7216                                ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7217                                if (debug_map_objfile)
7218                                {
7219                                    Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7220                                    if (debug_map_symtab)
7221                                    {
7222                                        Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7223                                                                                                               eSymbolTypeData,
7224                                                                                                               Symtab::eDebugYes,
7225                                                                                                               Symtab::eVisibilityExtern);
7226                                        if (exe_symbol)
7227                                        {
7228                                            if (exe_symbol->ValueIsAddress())
7229                                            {
7230                                                const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
7231                                                if (exe_file_addr != LLDB_INVALID_ADDRESS)
7232                                                {
7233                                                    if (location.Update_DW_OP_addr (exe_file_addr))
7234                                                    {
7235                                                        linked_oso_file_addr = true;
7236                                                        symbol_context_scope = exe_symbol;
7237                                                    }
7238                                                }
7239                                            }
7240                                        }
7241                                    }
7242                                }
7243                            }
7244
7245                            if (!linked_oso_file_addr)
7246                            {
7247                                // The DW_OP_addr is not zero, but it contains a .o file address which
7248                                // needs to be linked up correctly.
7249                                const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7250                                if (exe_file_addr != LLDB_INVALID_ADDRESS)
7251                                {
7252                                    // Update the file address for this variable
7253                                    location.Update_DW_OP_addr (exe_file_addr);
7254                                }
7255                                else
7256                                {
7257                                    // Variable didn't make it into the final executable
7258                                    return var_sp;
7259                                }
7260                            }
7261                        }
7262                    }
7263                    else
7264                    {
7265                        scope = eValueTypeVariableLocal;
7266                    }
7267                }
7268
7269                if (symbol_context_scope == NULL)
7270                {
7271                    switch (parent_tag)
7272                    {
7273                    case DW_TAG_subprogram:
7274                    case DW_TAG_inlined_subroutine:
7275                    case DW_TAG_lexical_block:
7276                        if (sc.function)
7277                        {
7278                            symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7279                            if (symbol_context_scope == NULL)
7280                                symbol_context_scope = sc.function;
7281                        }
7282                        break;
7283
7284                    default:
7285                        symbol_context_scope = sc.comp_unit;
7286                        break;
7287                    }
7288                }
7289
7290                if (symbol_context_scope)
7291                {
7292                    var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7293                                                name,
7294                                                mangled,
7295                                                SymbolFileTypeSP (new SymbolFileType(*this, type_uid)),
7296                                                scope,
7297                                                symbol_context_scope,
7298                                                &decl,
7299                                                location,
7300                                                is_external,
7301                                                is_artificial));
7302
7303                    var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7304                }
7305                else
7306                {
7307                    // Not ready to parse this variable yet. It might be a global
7308                    // or static variable that is in a function scope and the function
7309                    // in the symbol context wasn't filled in yet
7310                    return var_sp;
7311                }
7312            }
7313        }
7314        // Cache var_sp even if NULL (the variable was just a specification or
7315        // was missing vital information to be able to be displayed in the debugger
7316        // (missing location due to optimization, etc)) so we don't re-parse
7317        // this DIE over and over later...
7318        m_die_to_variable_sp[die] = var_sp;
7319    }
7320    return var_sp;
7321}
7322
7323
7324const DWARFDebugInfoEntry *
7325SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7326                                                   dw_offset_t spec_block_die_offset,
7327                                                   DWARFCompileUnit **result_die_cu_handle)
7328{
7329    // Give the concrete function die specified by "func_die_offset", find the
7330    // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7331    // to "spec_block_die_offset"
7332    DWARFDebugInfo* info = DebugInfo();
7333
7334    const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7335    if (die)
7336    {
7337        assert (*result_die_cu_handle);
7338        return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7339    }
7340    return NULL;
7341}
7342
7343
7344const DWARFDebugInfoEntry *
7345SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7346                                                  const DWARFDebugInfoEntry *die,
7347                                                  dw_offset_t spec_block_die_offset,
7348                                                  DWARFCompileUnit **result_die_cu_handle)
7349{
7350    if (die)
7351    {
7352        switch (die->Tag())
7353        {
7354        case DW_TAG_subprogram:
7355        case DW_TAG_inlined_subroutine:
7356        case DW_TAG_lexical_block:
7357            {
7358                if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7359                {
7360                    *result_die_cu_handle = dwarf_cu;
7361                    return die;
7362                }
7363
7364                if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7365                {
7366                    *result_die_cu_handle = dwarf_cu;
7367                    return die;
7368                }
7369            }
7370            break;
7371        }
7372
7373        // Give the concrete function die specified by "func_die_offset", find the
7374        // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7375        // to "spec_block_die_offset"
7376        for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7377        {
7378            const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7379                                                                                      child_die,
7380                                                                                      spec_block_die_offset,
7381                                                                                      result_die_cu_handle);
7382            if (result_die)
7383                return result_die;
7384        }
7385    }
7386
7387    *result_die_cu_handle = NULL;
7388    return NULL;
7389}
7390
7391size_t
7392SymbolFileDWARF::ParseVariables
7393(
7394    const SymbolContext& sc,
7395    DWARFCompileUnit* dwarf_cu,
7396    const lldb::addr_t func_low_pc,
7397    const DWARFDebugInfoEntry *orig_die,
7398    bool parse_siblings,
7399    bool parse_children,
7400    VariableList* cc_variable_list
7401)
7402{
7403    if (orig_die == NULL)
7404        return 0;
7405
7406    VariableListSP variable_list_sp;
7407
7408    size_t vars_added = 0;
7409    const DWARFDebugInfoEntry *die = orig_die;
7410    while (die != NULL)
7411    {
7412        dw_tag_t tag = die->Tag();
7413
7414        // Check to see if we have already parsed this variable or constant?
7415        if (m_die_to_variable_sp[die])
7416        {
7417            if (cc_variable_list)
7418                cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7419        }
7420        else
7421        {
7422            // We haven't already parsed it, lets do that now.
7423            if ((tag == DW_TAG_variable) ||
7424                (tag == DW_TAG_constant) ||
7425                (tag == DW_TAG_formal_parameter && sc.function))
7426            {
7427                if (variable_list_sp.get() == NULL)
7428                {
7429                    const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7430                    dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7431                    switch (parent_tag)
7432                    {
7433                        case DW_TAG_compile_unit:
7434                            if (sc.comp_unit != NULL)
7435                            {
7436                                variable_list_sp = sc.comp_unit->GetVariableList(false);
7437                                if (variable_list_sp.get() == NULL)
7438                                {
7439                                    variable_list_sp.reset(new VariableList());
7440                                    sc.comp_unit->SetVariableList(variable_list_sp);
7441                                }
7442                            }
7443                            else
7444                            {
7445                                GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7446                                                                           MakeUserID(sc_parent_die->GetOffset()),
7447                                                                           DW_TAG_value_to_name (parent_tag),
7448                                                                           MakeUserID(orig_die->GetOffset()),
7449                                                                           DW_TAG_value_to_name (orig_die->Tag()));
7450                            }
7451                            break;
7452
7453                        case DW_TAG_subprogram:
7454                        case DW_TAG_inlined_subroutine:
7455                        case DW_TAG_lexical_block:
7456                            if (sc.function != NULL)
7457                            {
7458                                // Check to see if we already have parsed the variables for the given scope
7459
7460                                Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7461                                if (block == NULL)
7462                                {
7463                                    // This must be a specification or abstract origin with
7464                                    // a concrete block couterpart in the current function. We need
7465                                    // to find the concrete block so we can correctly add the
7466                                    // variable to it
7467                                    DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7468                                    const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7469                                                                                                                      sc_parent_die->GetOffset(),
7470                                                                                                                      &concrete_block_die_cu);
7471                                    if (concrete_block_die)
7472                                        block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7473                                }
7474
7475                                if (block != NULL)
7476                                {
7477                                    const bool can_create = false;
7478                                    variable_list_sp = block->GetBlockVariableList (can_create);
7479                                    if (variable_list_sp.get() == NULL)
7480                                    {
7481                                        variable_list_sp.reset(new VariableList());
7482                                        block->SetVariableList(variable_list_sp);
7483                                    }
7484                                }
7485                            }
7486                            break;
7487
7488                        default:
7489                             GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7490                                                                        MakeUserID(orig_die->GetOffset()),
7491                                                                        DW_TAG_value_to_name (orig_die->Tag()));
7492                            break;
7493                    }
7494                }
7495
7496                if (variable_list_sp)
7497                {
7498                    VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7499                    if (var_sp)
7500                    {
7501                        variable_list_sp->AddVariableIfUnique (var_sp);
7502                        if (cc_variable_list)
7503                            cc_variable_list->AddVariableIfUnique (var_sp);
7504                        ++vars_added;
7505                    }
7506                }
7507            }
7508        }
7509
7510        bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7511
7512        if (!skip_children && parse_children && die->HasChildren())
7513        {
7514            vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7515        }
7516
7517        if (parse_siblings)
7518            die = die->GetSibling();
7519        else
7520            die = NULL;
7521    }
7522    return vars_added;
7523}
7524
7525//------------------------------------------------------------------
7526// PluginInterface protocol
7527//------------------------------------------------------------------
7528const char *
7529SymbolFileDWARF::GetPluginName()
7530{
7531    return "SymbolFileDWARF";
7532}
7533
7534const char *
7535SymbolFileDWARF::GetShortPluginName()
7536{
7537    return GetPluginNameStatic();
7538}
7539
7540uint32_t
7541SymbolFileDWARF::GetPluginVersion()
7542{
7543    return 1;
7544}
7545
7546void
7547SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7548{
7549    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7550    clang_type_t clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7551    if (clang_type)
7552        symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7553}
7554
7555void
7556SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7557{
7558    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7559    clang_type_t clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7560    if (clang_type)
7561        symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7562}
7563
7564void
7565SymbolFileDWARF::DumpIndexes ()
7566{
7567    StreamFile s(stdout, false);
7568
7569    s.Printf ("DWARF index for (%s) '%s':",
7570              GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7571              GetObjectFile()->GetFileSpec().GetPath().c_str());
7572    s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7573    s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7574    s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7575    s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7576    s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7577    s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7578    s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7579    s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7580}
7581
7582void
7583SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7584                                    const char *name,
7585                                    llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7586{
7587    DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7588
7589    if (iter == m_decl_ctx_to_die.end())
7590        return;
7591
7592    for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7593    {
7594        const DWARFDebugInfoEntry *context_die = *pos;
7595
7596        if (!results)
7597            return;
7598
7599        DWARFDebugInfo* info = DebugInfo();
7600
7601        DIEArray die_offsets;
7602
7603        DWARFCompileUnit* dwarf_cu = NULL;
7604        const DWARFDebugInfoEntry* die = NULL;
7605
7606        if (m_using_apple_tables)
7607        {
7608            if (m_apple_types_ap.get())
7609                m_apple_types_ap->FindByName (name, die_offsets);
7610        }
7611        else
7612        {
7613            if (!m_indexed)
7614                Index ();
7615
7616            m_type_index.Find (ConstString(name), die_offsets);
7617        }
7618
7619        const size_t num_matches = die_offsets.size();
7620
7621        if (num_matches)
7622        {
7623            for (size_t i = 0; i < num_matches; ++i)
7624            {
7625                const dw_offset_t die_offset = die_offsets[i];
7626                die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
7627
7628                if (die->GetParent() != context_die)
7629                    continue;
7630
7631                Type *matching_type = ResolveType (dwarf_cu, die);
7632
7633                lldb::clang_type_t type = matching_type->GetClangForwardType();
7634                clang::QualType qual_type = clang::QualType::getFromOpaquePtr(type);
7635
7636                if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
7637                {
7638                    clang::TagDecl *tag_decl = tag_type->getDecl();
7639                    results->push_back(tag_decl);
7640                }
7641                else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
7642                {
7643                    clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
7644                    results->push_back(typedef_decl);
7645                }
7646            }
7647        }
7648    }
7649}
7650
7651void
7652SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
7653                                                 const clang::DeclContext *decl_context,
7654                                                 clang::DeclarationName decl_name,
7655                                                 llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7656{
7657
7658    switch (decl_context->getDeclKind())
7659    {
7660    case clang::Decl::Namespace:
7661    case clang::Decl::TranslationUnit:
7662        {
7663            SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7664            symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
7665        }
7666        break;
7667    default:
7668        break;
7669    }
7670}
7671
7672bool
7673SymbolFileDWARF::LayoutRecordType (void *baton,
7674                                   const clang::RecordDecl *record_decl,
7675                                   uint64_t &size,
7676                                   uint64_t &alignment,
7677                                   llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7678                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7679                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7680{
7681    SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7682    return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
7683}
7684
7685
7686bool
7687SymbolFileDWARF::LayoutRecordType (const clang::RecordDecl *record_decl,
7688                                   uint64_t &bit_size,
7689                                   uint64_t &alignment,
7690                                   llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7691                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7692                                   llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7693{
7694    Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
7695    RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
7696    bool success = false;
7697    base_offsets.clear();
7698    vbase_offsets.clear();
7699    if (pos != m_record_decl_to_layout_map.end())
7700    {
7701        bit_size = pos->second.bit_size;
7702        alignment = pos->second.alignment;
7703        field_offsets.swap(pos->second.field_offsets);
7704        base_offsets.swap (pos->second.base_offsets);
7705        vbase_offsets.swap (pos->second.vbase_offsets);
7706        m_record_decl_to_layout_map.erase(pos);
7707        success = true;
7708    }
7709    else
7710    {
7711        bit_size = 0;
7712        alignment = 0;
7713        field_offsets.clear();
7714    }
7715
7716    if (log)
7717        GetObjectFile()->GetModule()->LogMessage (log,
7718                                                  "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
7719                                                  record_decl,
7720                                                  bit_size,
7721                                                  alignment,
7722                                                  (uint32_t)field_offsets.size(),
7723                                                  (uint32_t)base_offsets.size(),
7724                                                  (uint32_t)vbase_offsets.size(),
7725                                                  success);
7726    return success;
7727}
7728
7729
7730SymbolFileDWARFDebugMap *
7731SymbolFileDWARF::GetDebugMapSymfile ()
7732{
7733    if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
7734    {
7735        lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
7736        if (module_sp)
7737        {
7738            SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
7739            if (sym_vendor)
7740                m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
7741        }
7742    }
7743    return m_debug_map_symfile;
7744}
7745
7746
7747