contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

   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/ArchSpec.h"
  30 #include "lldb/Core/Module.h"
  31 #include "lldb/Core/ModuleList.h"
  32 #include "lldb/Core/ModuleSpec.h"
  33 #include "lldb/Core/PluginManager.h"
  34 #include "lldb/Core/RegularExpression.h"
  35 #include "lldb/Core/Scalar.h"
  36 #include "lldb/Core/Section.h"
  37 #include "lldb/Core/StreamFile.h"
  38 #include "lldb/Core/StreamString.h"
  39 #include "lldb/Core/Timer.h"
  40 #include "lldb/Core/Value.h"
  41
  42 #include "lldb/Expression/ClangModulesDeclVendor.h"
  43
  44 #include "lldb/Host/Host.h"
  45
  46 #include "lldb/Symbol/Block.h"
  47 #include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
  48 #include "lldb/Symbol/CompileUnit.h"
  49 #include "lldb/Symbol/LineTable.h"
  50 #include "lldb/Symbol/ObjectFile.h"
  51 #include "lldb/Symbol/SymbolVendor.h"
  52 #include "lldb/Symbol/VariableList.h"
  53
  54 #include "lldb/Target/ObjCLanguageRuntime.h"
  55 #include "lldb/Target/CPPLanguageRuntime.h"
  56
  57 #include "DWARFCompileUnit.h"
  58 #include "DWARFDebugAbbrev.h"
  59 #include "DWARFDebugAranges.h"
  60 #include "DWARFDebugInfo.h"
  61 #include "DWARFDebugInfoEntry.h"
  62 #include "DWARFDebugLine.h"
  63 #include "DWARFDebugPubnames.h"
  64 #include "DWARFDebugRanges.h"
  65 #include "DWARFDeclContext.h"
  66 #include "DWARFDIECollection.h"
  67 #include "DWARFFormValue.h"
  68 #include "DWARFLocationList.h"
  69 #include "LogChannelDWARF.h"
  70 #include "SymbolFileDWARFDebugMap.h"
  71
  72 #include <map>
  73
  74 #include <ctype.h>
  75 #include <string.h>
  76
  77 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
  78
  79 #ifdef ENABLE_DEBUG_PRINTF
  80 #include <stdio.h>
  81 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
  82 #else
  83 #define DEBUG_PRINTF(fmt, ...)
  84 #endif
  85
  86 #define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
  87
  88 using namespace lldb;
  89 using namespace lldb_private;
  90
  91 //static inline bool
  92 //child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
  93 //{
  94 //    switch (tag)
  95 //    {
  96 //    default:
  97 //        break;
  98 //    case DW_TAG_subprogram:
  99 //    case DW_TAG_inlined_subroutine:
 100 //    case DW_TAG_class_type:
 101 //    case DW_TAG_structure_type:
 102 //    case DW_TAG_union_type:
 103 //        return true;
 104 //    }
 105 //    return false;
 106 //}
 107 //
 108 static AccessType
 109 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
 110 {
 111     switch (dwarf_accessibility)
 112     {
 113         case DW_ACCESS_public:      return eAccessPublic;
 114         case DW_ACCESS_private:     return eAccessPrivate;
 115         case DW_ACCESS_protected:   return eAccessProtected;
 116         default:                    break;
 117     }
 118     return eAccessNone;
 119 }
 120
 121 static const char*
 122 removeHostnameFromPathname(const char* path_from_dwarf)
 123 {
 124     if (!path_from_dwarf || !path_from_dwarf[0])
 125     {
 126         return path_from_dwarf;
 127     }
 128
 129     const char *colon_pos = strchr(path_from_dwarf, ':');
 130     if (!colon_pos)
 131     {
 132         return path_from_dwarf;
 133     }
 134
 135     // check whether we have a windows path, and so the first character
 136     // is a drive-letter not a hostname.
 137     if (
 138         colon_pos == path_from_dwarf + 1 &&
 139         isalpha(*path_from_dwarf) &&
 140         strlen(path_from_dwarf) > 2 &&
 141         '\\' == path_from_dwarf[2])
 142     {
 143         return path_from_dwarf;
 144     }
 145
 146     return colon_pos + 1;
 147 }
 148
 149 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
 150
 151 class DIEStack
 152 {
 153 public:
 154
 155     void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
 156     {
 157         m_dies.push_back (DIEInfo(cu, die));
 158     }
 159
 160
 161     void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
 162     {
 163         StreamString log_strm;
 164         const size_t n = m_dies.size();
 165         log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
 166         for (size_t i=0; i<n; i++)
 167         {
 168             DWARFCompileUnit *cu = m_dies[i].cu;
 169             const DWARFDebugInfoEntry *die = m_dies[i].die;
 170             std::string qualified_name;
 171             die->GetQualifiedName(dwarf, cu, qualified_name);
 172             log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
 173                              (uint64_t)i,
 174                              die->GetOffset(),
 175                              DW_TAG_value_to_name(die->Tag()),
 176                              qualified_name.c_str());
 177         }
 178         log->PutCString(log_strm.GetData());
 179     }
 180     void Pop ()
 181     {
 182         m_dies.pop_back();
 183     }
 184
 185     class ScopedPopper
 186     {
 187     public:
 188         ScopedPopper (DIEStack &die_stack) :
 189             m_die_stack (die_stack),
 190             m_valid (false)
 191         {
 192         }
 193
 194         void
 195         Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
 196         {
 197             m_valid = true;
 198             m_die_stack.Push (cu, die);
 199         }
 200
 201         ~ScopedPopper ()
 202         {
 203             if (m_valid)
 204                 m_die_stack.Pop();
 205         }
 206
 207
 208
 209     protected:
 210         DIEStack &m_die_stack;
 211         bool m_valid;
 212     };
 213
 214 protected:
 215     struct DIEInfo {
 216         DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
 217             cu(c),
 218             die(d)
 219         {
 220         }
 221         DWARFCompileUnit *cu;
 222         const DWARFDebugInfoEntry *die;
 223     };
 224     typedef std::vector<DIEInfo> Stack;
 225     Stack m_dies;
 226 };
 227 #endif
 228
 229 void
 230 SymbolFileDWARF::Initialize()
 231 {
 232     LogChannelDWARF::Initialize();
 233     PluginManager::RegisterPlugin (GetPluginNameStatic(),
 234                                    GetPluginDescriptionStatic(),
 235                                    CreateInstance);
 236 }
 237
 238 void
 239 SymbolFileDWARF::Terminate()
 240 {
 241     PluginManager::UnregisterPlugin (CreateInstance);
 242     LogChannelDWARF::Initialize();
 243 }
 244
 245
 246 lldb_private::ConstString
 247 SymbolFileDWARF::GetPluginNameStatic()
 248 {
 249     static ConstString g_name("dwarf");
 250     return g_name;
 251 }
 252
 253 const char *
 254 SymbolFileDWARF::GetPluginDescriptionStatic()
 255 {
 256     return "DWARF and DWARF3 debug symbol file reader.";
 257 }
 258
 259
 260 SymbolFile*
 261 SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
 262 {
 263     return new SymbolFileDWARF(obj_file);
 264 }
 265
 266 TypeList *
 267 SymbolFileDWARF::GetTypeList ()
 268 {
 269     if (GetDebugMapSymfile ())
 270         return m_debug_map_symfile->GetTypeList();
 271     return m_obj_file->GetModule()->GetTypeList();
 272
 273 }
 274 void
 275 SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
 276                            const DWARFDebugInfoEntry *die,
 277                            dw_offset_t min_die_offset,
 278                            dw_offset_t max_die_offset,
 279                            uint32_t type_mask,
 280                            TypeSet &type_set)
 281 {
 282     if (cu)
 283     {
 284         if (die)
 285         {
 286             const dw_offset_t die_offset = die->GetOffset();
 287
 288             if (die_offset >= max_die_offset)
 289                 return;
 290
 291             if (die_offset >= min_die_offset)
 292             {
 293                 const dw_tag_t tag = die->Tag();
 294
 295                 bool add_type = false;
 296
 297                 switch (tag)
 298                 {
 299                     case DW_TAG_array_type:         add_type = (type_mask & eTypeClassArray         ) != 0; break;
 300                     case DW_TAG_unspecified_type:
 301                     case DW_TAG_base_type:          add_type = (type_mask & eTypeClassBuiltin       ) != 0; break;
 302                     case DW_TAG_class_type:         add_type = (type_mask & eTypeClassClass         ) != 0; break;
 303                     case DW_TAG_structure_type:     add_type = (type_mask & eTypeClassStruct        ) != 0; break;
 304                     case DW_TAG_union_type:         add_type = (type_mask & eTypeClassUnion         ) != 0; break;
 305                     case DW_TAG_enumeration_type:   add_type = (type_mask & eTypeClassEnumeration   ) != 0; break;
 306                     case DW_TAG_subroutine_type:
 307                     case DW_TAG_subprogram:
 308                     case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction      ) != 0; break;
 309                     case DW_TAG_pointer_type:       add_type = (type_mask & eTypeClassPointer       ) != 0; break;
 310                     case DW_TAG_rvalue_reference_type:
 311                     case DW_TAG_reference_type:     add_type = (type_mask & eTypeClassReference     ) != 0; break;
 312                     case DW_TAG_typedef:            add_type = (type_mask & eTypeClassTypedef       ) != 0; break;
 313                     case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
 314                 }
 315
 316                 if (add_type)
 317                 {
 318                     const bool assert_not_being_parsed = true;
 319                     Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
 320                     if (type)
 321                     {
 322                         if (type_set.find(type) == type_set.end())
 323                             type_set.insert(type);
 324                     }
 325                 }
 326             }
 327
 328             for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
 329                  child_die != NULL;
 330                  child_die = child_die->GetSibling())
 331             {
 332                 GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
 333             }
 334         }
 335     }
 336 }
 337
 338 size_t
 339 SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
 340                            uint32_t type_mask,
 341                            TypeList &type_list)
 342
 343 {
 344     TypeSet type_set;
 345
 346     CompileUnit *comp_unit = NULL;
 347     DWARFCompileUnit* dwarf_cu = NULL;
 348     if (sc_scope)
 349         comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
 350
 351     if (comp_unit)
 352     {
 353         dwarf_cu = GetDWARFCompileUnit(comp_unit);
 354         if (dwarf_cu == 0)
 355             return 0;
 356         GetTypes (dwarf_cu,
 357                   dwarf_cu->DIE(),
 358                   dwarf_cu->GetOffset(),
 359                   dwarf_cu->GetNextCompileUnitOffset(),
 360                   type_mask,
 361                   type_set);
 362     }
 363     else
 364     {
 365         DWARFDebugInfo* info = DebugInfo();
 366         if (info)
 367         {
 368             const size_t num_cus = info->GetNumCompileUnits();
 369             for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
 370             {
 371                 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
 372                 if (dwarf_cu)
 373                 {
 374                     GetTypes (dwarf_cu,
 375                               dwarf_cu->DIE(),
 376                               0,
 377                               UINT32_MAX,
 378                               type_mask,
 379                               type_set);
 380                 }
 381             }
 382         }
 383     }
 384 //    if (m_using_apple_tables)
 385 //    {
 386 //        DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
 387 //        if (apple_types)
 388 //        {
 389 //            apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
 390 //
 391 //                for (auto die_info: die_info_array)
 392 //                {
 393 //                    bool add_type = TagMatchesTypeMask (type_mask, 0);
 394 //                    if (!add_type)
 395 //                    {
 396 //                        dw_tag_t tag = die_info.tag;
 397 //                        if (tag == 0)
 398 //                        {
 399 //                            const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
 400 //                            tag = die->Tag();
 401 //                        }
 402 //                        add_type = TagMatchesTypeMask (type_mask, tag);
 403 //                    }
 404 //                    if (add_type)
 405 //                    {
 406 //                        Type *type = ResolveTypeUID(die_info.offset);
 407 //
 408 //                        if (type_set.find(type) == type_set.end())
 409 //                            type_set.insert(type);
 410 //                    }
 411 //                }
 412 //                return true; // Keep iterating
 413 //            });
 414 //        }
 415 //    }
 416 //    else
 417 //    {
 418 //        if (!m_indexed)
 419 //            Index ();
 420 //
 421 //        m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
 422 //
 423 //            bool add_type = TagMatchesTypeMask (type_mask, 0);
 424 //
 425 //            if (!add_type)
 426 //            {
 427 //                const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
 428 //                if (die)
 429 //                {
 430 //                    const dw_tag_t tag = die->Tag();
 431 //                    add_type = TagMatchesTypeMask (type_mask, tag);
 432 //                }
 433 //            }
 434 //
 435 //            if (add_type)
 436 //            {
 437 //                Type *type = ResolveTypeUID(die_offset);
 438 //
 439 //                if (type_set.find(type) == type_set.end())
 440 //                    type_set.insert(type);
 441 //            }
 442 //            return true; // Keep iterating
 443 //        });
 444 //    }
 445
 446     std::set<ClangASTType> clang_type_set;
 447     size_t num_types_added = 0;
 448     for (Type *type : type_set)
 449     {
 450         ClangASTType clang_type = type->GetClangForwardType();
 451         if (clang_type_set.find(clang_type) == clang_type_set.end())
 452         {
 453             clang_type_set.insert(clang_type);
 454             type_list.Insert (type->shared_from_this());
 455             ++num_types_added;
 456         }
 457     }
 458     return num_types_added;
 459 }
 460
 461
 462 //----------------------------------------------------------------------
 463 // Gets the first parent that is a lexical block, function or inlined
 464 // subroutine, or compile unit.
 465 //----------------------------------------------------------------------
 466 static const DWARFDebugInfoEntry *
 467 GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
 468 {
 469     const DWARFDebugInfoEntry *die;
 470     for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
 471     {
 472         dw_tag_t tag = die->Tag();
 473
 474         switch (tag)
 475         {
 476         case DW_TAG_compile_unit:
 477         case DW_TAG_subprogram:
 478         case DW_TAG_inlined_subroutine:
 479         case DW_TAG_lexical_block:
 480             return die;
 481         }
 482     }
 483     return NULL;
 484 }
 485
 486
 487 SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
 488     SymbolFile (objfile),
 489     UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
 490     m_debug_map_module_wp (),
 491     m_debug_map_symfile (NULL),
 492     m_clang_tu_decl (NULL),
 493     m_flags(),
 494     m_data_debug_abbrev (),
 495     m_data_debug_aranges (),
 496     m_data_debug_frame (),
 497     m_data_debug_info (),
 498     m_data_debug_line (),
 499     m_data_debug_loc (),
 500     m_data_debug_ranges (),
 501     m_data_debug_str (),
 502     m_data_apple_names (),
 503     m_data_apple_types (),
 504     m_data_apple_namespaces (),
 505     m_abbr(),
 506     m_info(),
 507     m_line(),
 508     m_apple_names_ap (),
 509     m_apple_types_ap (),
 510     m_apple_namespaces_ap (),
 511     m_apple_objc_ap (),
 512     m_function_basename_index(),
 513     m_function_fullname_index(),
 514     m_function_method_index(),
 515     m_function_selector_index(),
 516     m_objc_class_selectors_index(),
 517     m_global_index(),
 518     m_type_index(),
 519     m_namespace_index(),
 520     m_indexed (false),
 521     m_is_external_ast_source (false),
 522     m_using_apple_tables (false),
 523     m_fetched_external_modules (false),
 524     m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
 525     m_ranges(),
 526     m_unique_ast_type_map ()
 527 {
 528 }
 529
 530 SymbolFileDWARF::~SymbolFileDWARF()
 531 {
 532     if (m_is_external_ast_source)
 533     {
 534         ModuleSP module_sp (m_obj_file->GetModule());
 535         if (module_sp)
 536             module_sp->GetClangASTContext().RemoveExternalSource ();
 537     }
 538 }
 539
 540 static const ConstString &
 541 GetDWARFMachOSegmentName ()
 542 {
 543     static ConstString g_dwarf_section_name ("__DWARF");
 544     return g_dwarf_section_name;
 545 }
 546
 547 UniqueDWARFASTTypeMap &
 548 SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
 549 {
 550     if (GetDebugMapSymfile ())
 551         return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
 552     return m_unique_ast_type_map;
 553 }
 554
 555 ClangASTContext &
 556 SymbolFileDWARF::GetClangASTContext ()
 557 {
 558     if (GetDebugMapSymfile ())
 559         return m_debug_map_symfile->GetClangASTContext ();
 560
 561     ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
 562     if (!m_is_external_ast_source)
 563     {
 564         m_is_external_ast_source = true;
 565         llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source_ap (
 566             new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
 567                                                  SymbolFileDWARF::CompleteObjCInterfaceDecl,
 568                                                  SymbolFileDWARF::FindExternalVisibleDeclsByName,
 569                                                  SymbolFileDWARF::LayoutRecordType,
 570                                                  this));
 571         ast.SetExternalSource (ast_source_ap);
 572     }
 573     return ast;
 574 }
 575
 576 void
 577 SymbolFileDWARF::InitializeObject()
 578 {
 579     // Install our external AST source callbacks so we can complete Clang types.
 580     ModuleSP module_sp (m_obj_file->GetModule());
 581     if (module_sp)
 582     {
 583         const SectionList *section_list = module_sp->GetSectionList();
 584
 585         const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
 586
 587         // Memory map the DWARF mach-o segment so we have everything mmap'ed
 588         // to keep our heap memory usage down.
 589         if (section)
 590             m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
 591     }
 592     get_apple_names_data();
 593     if (m_data_apple_names.GetByteSize() > 0)
 594     {
 595         m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
 596         if (m_apple_names_ap->IsValid())
 597             m_using_apple_tables = true;
 598         else
 599             m_apple_names_ap.reset();
 600     }
 601     get_apple_types_data();
 602     if (m_data_apple_types.GetByteSize() > 0)
 603     {
 604         m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
 605         if (m_apple_types_ap->IsValid())
 606             m_using_apple_tables = true;
 607         else
 608             m_apple_types_ap.reset();
 609     }
 610
 611     get_apple_namespaces_data();
 612     if (m_data_apple_namespaces.GetByteSize() > 0)
 613     {
 614         m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
 615         if (m_apple_namespaces_ap->IsValid())
 616             m_using_apple_tables = true;
 617         else
 618             m_apple_namespaces_ap.reset();
 619     }
 620
 621     get_apple_objc_data();
 622     if (m_data_apple_objc.GetByteSize() > 0)
 623     {
 624         m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
 625         if (m_apple_objc_ap->IsValid())
 626             m_using_apple_tables = true;
 627         else
 628             m_apple_objc_ap.reset();
 629     }
 630 }
 631
 632 bool
 633 SymbolFileDWARF::SupportedVersion(uint16_t version)
 634 {
 635     return version == 2 || version == 3 || version == 4;
 636 }
 637
 638 uint32_t
 639 SymbolFileDWARF::CalculateAbilities ()
 640 {
 641     uint32_t abilities = 0;
 642     if (m_obj_file != NULL)
 643     {
 644         const Section* section = NULL;
 645         const SectionList *section_list = m_obj_file->GetSectionList();
 646         if (section_list == NULL)
 647             return 0;
 648
 649         uint64_t debug_abbrev_file_size = 0;
 650         uint64_t debug_info_file_size = 0;
 651         uint64_t debug_line_file_size = 0;
 652
 653         section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
 654
 655         if (section)
 656             section_list = &section->GetChildren ();
 657
 658         section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
 659         if (section != NULL)
 660         {
 661             debug_info_file_size = section->GetFileSize();
 662
 663             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
 664             if (section)
 665                 debug_abbrev_file_size = section->GetFileSize();
 666             else
 667                 m_flags.Set (flagsGotDebugAbbrevData);
 668
 669             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
 670             if (!section)
 671                 m_flags.Set (flagsGotDebugArangesData);
 672
 673             section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
 674             if (!section)
 675                 m_flags.Set (flagsGotDebugFrameData);
 676
 677             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
 678             if (section)
 679                 debug_line_file_size = section->GetFileSize();
 680             else
 681                 m_flags.Set (flagsGotDebugLineData);
 682
 683             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
 684             if (!section)
 685                 m_flags.Set (flagsGotDebugLocData);
 686
 687             section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
 688             if (!section)
 689                 m_flags.Set (flagsGotDebugMacInfoData);
 690
 691             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
 692             if (!section)
 693                 m_flags.Set (flagsGotDebugPubNamesData);
 694
 695             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
 696             if (!section)
 697                 m_flags.Set (flagsGotDebugPubTypesData);
 698
 699             section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
 700             if (!section)
 701                 m_flags.Set (flagsGotDebugRangesData);
 702
 703             section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
 704             if (!section)
 705                 m_flags.Set (flagsGotDebugStrData);
 706         }
 707         else
 708         {
 709             const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
 710             if (symfile_dir_cstr)
 711             {
 712                 if (strcasestr(symfile_dir_cstr, ".dsym"))
 713                 {
 714                     if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
 715                     {
 716                         // We have a dSYM file that didn't have a any debug info.
 717                         // If the string table has a size of 1, then it was made from
 718                         // an executable with no debug info, or from an executable that
 719                         // was stripped.
 720                         section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
 721                         if (section && section->GetFileSize() == 1)
 722                         {
 723                             m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
 724                         }
 725                     }
 726                 }
 727             }
 728         }
 729
 730         if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
 731             abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
 732
 733         if (debug_line_file_size > 0)
 734             abilities |= LineTables;
 735     }
 736     return abilities;
 737 }
 738
 739 const DWARFDataExtractor&
 740 SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
 741 {
 742     if (m_flags.IsClear (got_flag))
 743     {
 744         ModuleSP module_sp (m_obj_file->GetModule());
 745         m_flags.Set (got_flag);
 746         const SectionList *section_list = module_sp->GetSectionList();
 747         if (section_list)
 748         {
 749             SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
 750             if (section_sp)
 751             {
 752                 // See if we memory mapped the DWARF segment?
 753                 if (m_dwarf_data.GetByteSize())
 754                 {
 755                     data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
 756                 }
 757                 else
 758                 {
 759                     if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
 760                         data.Clear();
 761                 }
 762             }
 763         }
 764     }
 765     return data;
 766 }
 767
 768 const DWARFDataExtractor&
 769 SymbolFileDWARF::get_debug_abbrev_data()
 770 {
 771     return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
 772 }
 773
 774 const DWARFDataExtractor&
 775 SymbolFileDWARF::get_debug_aranges_data()
 776 {
 777     return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
 778 }
 779
 780 const DWARFDataExtractor&
 781 SymbolFileDWARF::get_debug_frame_data()
 782 {
 783     return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
 784 }
 785
 786 const DWARFDataExtractor&
 787 SymbolFileDWARF::get_debug_info_data()
 788 {
 789     return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
 790 }
 791
 792 const DWARFDataExtractor&
 793 SymbolFileDWARF::get_debug_line_data()
 794 {
 795     return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
 796 }
 797
 798 const DWARFDataExtractor&
 799 SymbolFileDWARF::get_debug_loc_data()
 800 {
 801     return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
 802 }
 803
 804 const DWARFDataExtractor&
 805 SymbolFileDWARF::get_debug_ranges_data()
 806 {
 807     return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
 808 }
 809
 810 const DWARFDataExtractor&
 811 SymbolFileDWARF::get_debug_str_data()
 812 {
 813     return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
 814 }
 815
 816 const DWARFDataExtractor&
 817 SymbolFileDWARF::get_apple_names_data()
 818 {
 819     return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
 820 }
 821
 822 const DWARFDataExtractor&
 823 SymbolFileDWARF::get_apple_types_data()
 824 {
 825     return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
 826 }
 827
 828 const DWARFDataExtractor&
 829 SymbolFileDWARF::get_apple_namespaces_data()
 830 {
 831     return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
 832 }
 833
 834 const DWARFDataExtractor&
 835 SymbolFileDWARF::get_apple_objc_data()
 836 {
 837     return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
 838 }
 839
 840
 841 DWARFDebugAbbrev*
 842 SymbolFileDWARF::DebugAbbrev()
 843 {
 844     if (m_abbr.get() == NULL)
 845     {
 846         const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
 847         if (debug_abbrev_data.GetByteSize() > 0)
 848         {
 849             m_abbr.reset(new DWARFDebugAbbrev());
 850             if (m_abbr.get())
 851                 m_abbr->Parse(debug_abbrev_data);
 852         }
 853     }
 854     return m_abbr.get();
 855 }
 856
 857 const DWARFDebugAbbrev*
 858 SymbolFileDWARF::DebugAbbrev() const
 859 {
 860     return m_abbr.get();
 861 }
 862
 863
 864 DWARFDebugInfo*
 865 SymbolFileDWARF::DebugInfo()
 866 {
 867     if (m_info.get() == NULL)
 868     {
 869         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
 870                            __PRETTY_FUNCTION__, static_cast<void*>(this));
 871         if (get_debug_info_data().GetByteSize() > 0)
 872         {
 873             m_info.reset(new DWARFDebugInfo());
 874             if (m_info.get())
 875             {
 876                 m_info->SetDwarfData(this);
 877             }
 878         }
 879     }
 880     return m_info.get();
 881 }
 882
 883 const DWARFDebugInfo*
 884 SymbolFileDWARF::DebugInfo() const
 885 {
 886     return m_info.get();
 887 }
 888
 889 DWARFCompileUnit*
 890 SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
 891 {
 892     DWARFDebugInfo* info = DebugInfo();
 893     if (info)
 894     {
 895         if (GetDebugMapSymfile ())
 896         {
 897             // The debug map symbol file made the compile units for this DWARF
 898             // file which is .o file with DWARF in it, and we should have
 899             // only 1 compile unit which is at offset zero in the DWARF.
 900             // TODO: modify to support LTO .o files where each .o file might
 901             // have multiple DW_TAG_compile_unit tags.
 902
 903             DWARFCompileUnit *dwarf_cu = info->GetCompileUnit(0).get();
 904             if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
 905                 dwarf_cu->SetUserData(comp_unit);
 906             return dwarf_cu;
 907         }
 908         else
 909         {
 910             // Just a normal DWARF file whose user ID for the compile unit is
 911             // the DWARF offset itself
 912
 913             DWARFCompileUnit *dwarf_cu = info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
 914             if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
 915                 dwarf_cu->SetUserData(comp_unit);
 916             return dwarf_cu;
 917
 918         }
 919     }
 920     return NULL;
 921 }
 922
 923
 924 DWARFDebugRanges*
 925 SymbolFileDWARF::DebugRanges()
 926 {
 927     if (m_ranges.get() == NULL)
 928     {
 929         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
 930                            __PRETTY_FUNCTION__, static_cast<void*>(this));
 931         if (get_debug_ranges_data().GetByteSize() > 0)
 932         {
 933             m_ranges.reset(new DWARFDebugRanges());
 934             if (m_ranges.get())
 935                 m_ranges->Extract(this);
 936         }
 937     }
 938     return m_ranges.get();
 939 }
 940
 941 const DWARFDebugRanges*
 942 SymbolFileDWARF::DebugRanges() const
 943 {
 944     return m_ranges.get();
 945 }
 946
 947 lldb::CompUnitSP
 948 SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
 949 {
 950     CompUnitSP cu_sp;
 951     if (dwarf_cu)
 952     {
 953         CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
 954         if (comp_unit)
 955         {
 956             // We already parsed this compile unit, had out a shared pointer to it
 957             cu_sp = comp_unit->shared_from_this();
 958         }
 959         else
 960         {
 961             if (GetDebugMapSymfile ())
 962             {
 963                 // Let the debug map create the compile unit
 964                 cu_sp = m_debug_map_symfile->GetCompileUnit(this);
 965                 dwarf_cu->SetUserData(cu_sp.get());
 966             }
 967             else
 968             {
 969                 ModuleSP module_sp (m_obj_file->GetModule());
 970                 if (module_sp)
 971                 {
 972                     const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
 973                     if (cu_die)
 974                     {
 975                         FileSpec cu_file_spec{cu_die->GetName(this, dwarf_cu), false};
 976                         if (cu_file_spec)
 977                         {
 978                             // If we have a full path to the compile unit, we don't need to resolve
 979                             // the file.  This can be expensive e.g. when the source files are NFS mounted.
 980                             if (cu_file_spec.IsRelative())
 981                             {
 982                                 // DWARF2/3 suggests the form hostname:pathname for compilation directory.
 983                                 // Remove the host part if present.
 984                                 const char *cu_comp_dir{cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, nullptr)};
 985                                 cu_file_spec.PrependPathComponent(removeHostnameFromPathname(cu_comp_dir));
 986                             }
 987
 988                             std::string remapped_file;
 989                             if (module_sp->RemapSourceFile(cu_file_spec.GetCString(), remapped_file))
 990                                 cu_file_spec.SetFile(remapped_file, false);
 991                         }
 992
 993                         LanguageType cu_language = DWARFCompileUnit::LanguageTypeFromDWARF(cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0));
 994
 995                         cu_sp.reset(new CompileUnit (module_sp,
 996                                                      dwarf_cu,
 997                                                      cu_file_spec,
 998                                                      MakeUserID(dwarf_cu->GetOffset()),
 999                                                      cu_language));
1000                         if (cu_sp)
1001                         {
1002                             // If we just created a compile unit with an invalid file spec, try and get the
1003                             // first entry in the supports files from the line table as that should be the
1004                             // compile unit.
1005                             if (!cu_file_spec)
1006                             {
1007                                 cu_file_spec = cu_sp->GetSupportFiles().GetFileSpecAtIndex(1);
1008                                 if (cu_file_spec)
1009                                 {
1010                                     (FileSpec &)(*cu_sp) = cu_file_spec;
1011                                     // Also fix the invalid file spec which was copied from the compile unit.
1012                                     cu_sp->GetSupportFiles().Replace(0, cu_file_spec);
1013                                 }
1014                             }
1015
1016                             dwarf_cu->SetUserData(cu_sp.get());
1017
1018                             // Figure out the compile unit index if we weren't given one
1019                             if (cu_idx == UINT32_MAX)
1020                                 DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
1021
1022                             m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
1023                         }
1024                     }
1025                 }
1026             }
1027         }
1028     }
1029     return cu_sp;
1030 }
1031
1032 uint32_t
1033 SymbolFileDWARF::GetNumCompileUnits()
1034 {
1035     DWARFDebugInfo* info = DebugInfo();
1036     if (info)
1037         return info->GetNumCompileUnits();
1038     return 0;
1039 }
1040
1041 CompUnitSP
1042 SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
1043 {
1044     CompUnitSP cu_sp;
1045     DWARFDebugInfo* info = DebugInfo();
1046     if (info)
1047     {
1048         DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
1049         if (dwarf_cu)
1050             cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
1051     }
1052     return cu_sp;
1053 }
1054
1055 Function *
1056 SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
1057 {
1058     DWARFDebugRanges::RangeList func_ranges;
1059     const char *name = NULL;
1060     const char *mangled = NULL;
1061     int decl_file = 0;
1062     int decl_line = 0;
1063     int decl_column = 0;
1064     int call_file = 0;
1065     int call_line = 0;
1066     int call_column = 0;
1067     DWARFExpression frame_base;
1068
1069     assert (die->Tag() == DW_TAG_subprogram);
1070
1071     if (die->Tag() != DW_TAG_subprogram)
1072         return NULL;
1073
1074     if (die->GetDIENamesAndRanges (this,
1075                                    dwarf_cu,
1076                                    name,
1077                                    mangled,
1078                                    func_ranges,
1079                                    decl_file,
1080                                    decl_line,
1081                                    decl_column,
1082                                    call_file,
1083                                    call_line,
1084                                    call_column,
1085                                    &frame_base))
1086     {
1087         // Union of all ranges in the function DIE (if the function is discontiguous)
1088         AddressRange func_range;
1089         lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
1090         lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
1091         if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
1092         {
1093             ModuleSP module_sp (m_obj_file->GetModule());
1094             func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
1095             if (func_range.GetBaseAddress().IsValid())
1096                 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1097         }
1098
1099         if (func_range.GetBaseAddress().IsValid())
1100         {
1101             Mangled func_name;
1102             if (mangled)
1103                 func_name.SetValue(ConstString(mangled), true);
1104             else if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
1105                      LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()) &&
1106                      name && strcmp(name, "main") != 0)
1107             {
1108                 // If the mangled name is not present in the DWARF, generate the demangled name
1109                 // using the decl context. We skip if the function is "main" as its name is
1110                 // never mangled.
1111                 bool is_static = false;
1112                 bool is_variadic = false;
1113                 unsigned type_quals = 0;
1114                 std::vector<ClangASTType> param_types;
1115                 std::vector<clang::ParmVarDecl*> param_decls;
1116                 const DWARFDebugInfoEntry *decl_ctx_die = NULL;
1117                 DWARFDeclContext decl_ctx;
1118                 StreamString sstr;
1119
1120                 die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
1121                 sstr << decl_ctx.GetQualifiedName();
1122
1123                 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(dwarf_cu,
1124                                                                                            die,
1125                                                                                            &decl_ctx_die);
1126                 ParseChildParameters(sc,
1127                                      containing_decl_ctx,
1128                                      dwarf_cu,
1129                                      die,
1130                                      true,
1131                                      is_static,
1132                                      is_variadic,
1133                                      param_types,
1134                                      param_decls,
1135                                      type_quals);
1136                 sstr << "(";
1137                 for (size_t i = 0; i < param_types.size(); i++)
1138                 {
1139                     if (i > 0)
1140                         sstr << ", ";
1141                     sstr << param_types[i].GetTypeName();
1142                 }
1143                 if (is_variadic)
1144                     sstr << ", ...";
1145                 sstr << ")";
1146                 if (type_quals & clang::Qualifiers::Const)
1147                     sstr << " const";
1148
1149                 func_name.SetValue(ConstString(sstr.GetData()), false);
1150             }
1151             else
1152                 func_name.SetValue(ConstString(name), false);
1153
1154             FunctionSP func_sp;
1155             std::unique_ptr<Declaration> decl_ap;
1156             if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1157                 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1158                                                decl_line,
1159                                                decl_column));
1160
1161             // Supply the type _only_ if it has already been parsed
1162             Type *func_type = m_die_to_type.lookup (die);
1163
1164             assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1165
1166             if (FixupAddress (func_range.GetBaseAddress()))
1167             {
1168                 const user_id_t func_user_id = MakeUserID(die->GetOffset());
1169                 func_sp.reset(new Function (sc.comp_unit,
1170                                             MakeUserID(func_user_id),       // UserID is the DIE offset
1171                                             MakeUserID(func_user_id),
1172                                             func_name,
1173                                             func_type,
1174                                             func_range));           // first address range
1175
1176                 if (func_sp.get() != NULL)
1177                 {
1178                     if (frame_base.IsValid())
1179                         func_sp->GetFrameBaseExpression() = frame_base;
1180                     sc.comp_unit->AddFunction(func_sp);
1181                     return func_sp.get();
1182                 }
1183             }
1184         }
1185     }
1186     return NULL;
1187 }
1188
1189 bool
1190 SymbolFileDWARF::FixupAddress (Address &addr)
1191 {
1192     SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1193     if (debug_map_symfile)
1194     {
1195         return debug_map_symfile->LinkOSOAddress(addr);
1196     }
1197     // This is a normal DWARF file, no address fixups need to happen
1198     return true;
1199 }
1200 lldb::LanguageType
1201 SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1202 {
1203     assert (sc.comp_unit);
1204     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1205     if (dwarf_cu)
1206     {
1207         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1208         if (die)
1209             return DWARFCompileUnit::LanguageTypeFromDWARF(die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0));
1210     }
1211     return eLanguageTypeUnknown;
1212 }
1213
1214 size_t
1215 SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1216 {
1217     assert (sc.comp_unit);
1218     size_t functions_added = 0;
1219     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1220     if (dwarf_cu)
1221     {
1222         DWARFDIECollection function_dies;
1223         const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1224         size_t func_idx;
1225         for (func_idx = 0; func_idx < num_functions; ++func_idx)
1226         {
1227             const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1228             if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1229             {
1230                 if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1231                     ++functions_added;
1232             }
1233         }
1234         //FixupTypes();
1235     }
1236     return functions_added;
1237 }
1238
1239 bool
1240 SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1241 {
1242     assert (sc.comp_unit);
1243     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1244     if (dwarf_cu)
1245     {
1246         const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1247
1248         if (cu_die)
1249         {
1250             const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1251
1252             // DWARF2/3 suggests the form hostname:pathname for compilation directory.
1253             // Remove the host part if present.
1254             cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
1255
1256             dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1257
1258             // All file indexes in DWARF are one based and a file of index zero is
1259             // supposed to be the compile unit itself.
1260             support_files.Append (*sc.comp_unit);
1261
1262             return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1263         }
1264     }
1265     return false;
1266 }
1267
1268 bool
1269 SymbolFileDWARF::ParseImportedModules (const lldb_private::SymbolContext &sc, std::vector<lldb_private::ConstString> &imported_modules)
1270 {
1271     assert (sc.comp_unit);
1272     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1273     if (dwarf_cu)
1274     {
1275         if (ClangModulesDeclVendor::LanguageSupportsClangModules(sc.comp_unit->GetLanguage()))
1276         {
1277             UpdateExternalModuleListIfNeeded();
1278             for (const std::pair<uint64_t, const ClangModuleInfo> &external_type_module : m_external_type_modules)
1279             {
1280                 imported_modules.push_back(external_type_module.second.m_name);
1281             }
1282         }
1283     }
1284     return false;
1285 }
1286
1287 struct ParseDWARFLineTableCallbackInfo
1288 {
1289     LineTable* line_table;
1290     std::unique_ptr<LineSequence> sequence_ap;
1291 };
1292
1293 //----------------------------------------------------------------------
1294 // ParseStatementTableCallback
1295 //----------------------------------------------------------------------
1296 static void
1297 ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1298 {
1299     if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1300     {
1301         // Just started parsing the line table
1302     }
1303     else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1304     {
1305         // Done parsing line table, nothing to do for the cleanup
1306     }
1307     else
1308     {
1309         ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1310         LineTable* line_table = info->line_table;
1311
1312         // If this is our first time here, we need to create a
1313         // sequence container.
1314         if (!info->sequence_ap.get())
1315         {
1316             info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1317             assert(info->sequence_ap.get());
1318         }
1319         line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1320                                                state.address,
1321                                                state.line,
1322                                                state.column,
1323                                                state.file,
1324                                                state.is_stmt,
1325                                                state.basic_block,
1326                                                state.prologue_end,
1327                                                state.epilogue_begin,
1328                                                state.end_sequence);
1329         if (state.end_sequence)
1330         {
1331             // First, put the current sequence into the line table.
1332             line_table->InsertSequence(info->sequence_ap.get());
1333             // Then, empty it to prepare for the next sequence.
1334             info->sequence_ap->Clear();
1335         }
1336     }
1337 }
1338
1339 bool
1340 SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1341 {
1342     assert (sc.comp_unit);
1343     if (sc.comp_unit->GetLineTable() != NULL)
1344         return true;
1345
1346     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1347     if (dwarf_cu)
1348     {
1349         const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1350         if (dwarf_cu_die)
1351         {
1352             const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1353             if (cu_line_offset != DW_INVALID_OFFSET)
1354             {
1355                 std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1356                 if (line_table_ap.get())
1357                 {
1358                     ParseDWARFLineTableCallbackInfo info;
1359                     info.line_table = line_table_ap.get();
1360                     lldb::offset_t offset = cu_line_offset;
1361                     DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1362                     if (m_debug_map_symfile)
1363                     {
1364                         // We have an object file that has a line table with addresses
1365                         // that are not linked. We need to link the line table and convert
1366                         // the addresses that are relative to the .o file into addresses
1367                         // for the main executable.
1368                         sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1369                     }
1370                     else
1371                     {
1372                         sc.comp_unit->SetLineTable(line_table_ap.release());
1373                         return true;
1374                     }
1375                 }
1376             }
1377         }
1378     }
1379     return false;
1380 }
1381
1382 size_t
1383 SymbolFileDWARF::ParseFunctionBlocks
1384 (
1385     const SymbolContext& sc,
1386     Block *parent_block,
1387     DWARFCompileUnit* dwarf_cu,
1388     const DWARFDebugInfoEntry *die,
1389     addr_t subprogram_low_pc,
1390     uint32_t depth
1391 )
1392 {
1393     size_t blocks_added = 0;
1394     while (die != NULL)
1395     {
1396         dw_tag_t tag = die->Tag();
1397
1398         switch (tag)
1399         {
1400         case DW_TAG_inlined_subroutine:
1401         case DW_TAG_subprogram:
1402         case DW_TAG_lexical_block:
1403             {
1404                 Block *block = NULL;
1405                 if (tag == DW_TAG_subprogram)
1406                 {
1407                     // Skip any DW_TAG_subprogram DIEs that are inside
1408                     // of a normal or inlined functions. These will be
1409                     // parsed on their own as separate entities.
1410
1411                     if (depth > 0)
1412                         break;
1413
1414                     block = parent_block;
1415                 }
1416                 else
1417                 {
1418                     BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1419                     parent_block->AddChild(block_sp);
1420                     block = block_sp.get();
1421                 }
1422                 DWARFDebugRanges::RangeList ranges;
1423                 const char *name = NULL;
1424                 const char *mangled_name = NULL;
1425
1426                 int decl_file = 0;
1427                 int decl_line = 0;
1428                 int decl_column = 0;
1429                 int call_file = 0;
1430                 int call_line = 0;
1431                 int call_column = 0;
1432                 if (die->GetDIENamesAndRanges (this,
1433                                                dwarf_cu,
1434                                                name,
1435                                                mangled_name,
1436                                                ranges,
1437                                                decl_file, decl_line, decl_column,
1438                                                call_file, call_line, call_column))
1439                 {
1440                     if (tag == DW_TAG_subprogram)
1441                     {
1442                         assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1443                         subprogram_low_pc = ranges.GetMinRangeBase(0);
1444                     }
1445                     else if (tag == DW_TAG_inlined_subroutine)
1446                     {
1447                         // We get called here for inlined subroutines in two ways.
1448                         // The first time is when we are making the Function object
1449                         // for this inlined concrete instance.  Since we're creating a top level block at
1450                         // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1451                         // adjust the containing address.
1452                         // The second time is when we are parsing the blocks inside the function that contains
1453                         // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1454                         // function the offset will be for that function.
1455                         if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1456                         {
1457                             subprogram_low_pc = ranges.GetMinRangeBase(0);
1458                         }
1459                     }
1460
1461                     const size_t num_ranges = ranges.GetSize();
1462                     for (size_t i = 0; i<num_ranges; ++i)
1463                     {
1464                         const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
1465                         const addr_t range_base = range.GetRangeBase();
1466                         if (range_base >= subprogram_low_pc)
1467                             block->AddRange(Block::Range (range_base - subprogram_low_pc, range.GetByteSize()));
1468                         else
1469                         {
1470                             GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": adding range [0x%" PRIx64 "-0x%" PRIx64 ") which has a base that is less than the function's low PC 0x%" PRIx64 ". Please file a bug and attach the file at the start of this error message",
1471                                                                        block->GetID(),
1472                                                                        range_base,
1473                                                                        range.GetRangeEnd(),
1474                                                                        subprogram_low_pc);
1475                         }
1476                     }
1477                     block->FinalizeRanges ();
1478
1479                     if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1480                     {
1481                         std::unique_ptr<Declaration> decl_ap;
1482                         if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1483                             decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1484                                                           decl_line, decl_column));
1485
1486                         std::unique_ptr<Declaration> call_ap;
1487                         if (call_file != 0 || call_line != 0 || call_column != 0)
1488                             call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1489                                                           call_line, call_column));
1490
1491                         block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1492                     }
1493
1494                     ++blocks_added;
1495
1496                     if (die->HasChildren())
1497                     {
1498                         blocks_added += ParseFunctionBlocks (sc,
1499                                                              block,
1500                                                              dwarf_cu,
1501                                                              die->GetFirstChild(),
1502                                                              subprogram_low_pc,
1503                                                              depth + 1);
1504                     }
1505                 }
1506             }
1507             break;
1508         default:
1509             break;
1510         }
1511
1512         // Only parse siblings of the block if we are not at depth zero. A depth
1513         // of zero indicates we are currently parsing the top level
1514         // DW_TAG_subprogram DIE
1515
1516         if (depth == 0)
1517             die = NULL;
1518         else
1519             die = die->GetSibling();
1520     }
1521     return blocks_added;
1522 }
1523
1524 bool
1525 SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1526                                    const DWARFDebugInfoEntry *die,
1527                                    ClangASTContext::TemplateParameterInfos &template_param_infos)
1528 {
1529     const dw_tag_t tag = die->Tag();
1530
1531     switch (tag)
1532     {
1533     case DW_TAG_template_type_parameter:
1534     case DW_TAG_template_value_parameter:
1535         {
1536             const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
1537
1538             DWARFDebugInfoEntry::Attributes attributes;
1539             const size_t num_attributes = die->GetAttributes (this,
1540                                                               dwarf_cu,
1541                                                               fixed_form_sizes,
1542                                                               attributes);
1543             const char *name = NULL;
1544             Type *lldb_type = NULL;
1545             ClangASTType clang_type;
1546             uint64_t uval64 = 0;
1547             bool uval64_valid = false;
1548             if (num_attributes > 0)
1549             {
1550                 DWARFFormValue form_value;
1551                 for (size_t i=0; i<num_attributes; ++i)
1552                 {
1553                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
1554
1555                     switch (attr)
1556                     {
1557                         case DW_AT_name:
1558                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1559                                 name = form_value.AsCString(&get_debug_str_data());
1560                             break;
1561
1562                         case DW_AT_type:
1563                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1564                             {
1565                                 const dw_offset_t type_die_offset = form_value.Reference();
1566                                 lldb_type = ResolveTypeUID(type_die_offset);
1567                                 if (lldb_type)
1568                                     clang_type = lldb_type->GetClangForwardType();
1569                             }
1570                             break;
1571
1572                         case DW_AT_const_value:
1573                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1574                             {
1575                                 uval64_valid = true;
1576                                 uval64 = form_value.Unsigned();
1577                             }
1578                             break;
1579                         default:
1580                             break;
1581                     }
1582                 }
1583
1584                 clang::ASTContext *ast = GetClangASTContext().getASTContext();
1585                 if (!clang_type)
1586                     clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1587
1588                 if (clang_type)
1589                 {
1590                     bool is_signed = false;
1591                     if (name && name[0])
1592                         template_param_infos.names.push_back(name);
1593                     else
1594                         template_param_infos.names.push_back(NULL);
1595
1596                     if (tag == DW_TAG_template_value_parameter &&
1597                         lldb_type != NULL &&
1598                         clang_type.IsIntegerType (is_signed) &&
1599                         uval64_valid)
1600                     {
1601                         llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1602                         template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1603                                                                                       llvm::APSInt(apint),
1604                                                                                       clang_type.GetQualType()));
1605                     }
1606                     else
1607                     {
1608                         template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1609                     }
1610                 }
1611                 else
1612                 {
1613                     return false;
1614                 }
1615
1616             }
1617         }
1618         return true;
1619
1620     default:
1621         break;
1622     }
1623     return false;
1624 }
1625
1626 bool
1627 SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1628                                               const DWARFDebugInfoEntry *parent_die,
1629                                               ClangASTContext::TemplateParameterInfos &template_param_infos)
1630 {
1631
1632     if (parent_die == NULL)
1633         return false;
1634
1635     Args template_parameter_names;
1636     for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1637          die != NULL;
1638          die = die->GetSibling())
1639     {
1640         const dw_tag_t tag = die->Tag();
1641
1642         switch (tag)
1643         {
1644             case DW_TAG_template_type_parameter:
1645             case DW_TAG_template_value_parameter:
1646                 ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1647             break;
1648
1649         default:
1650             break;
1651         }
1652     }
1653     if (template_param_infos.args.empty())
1654         return false;
1655     return template_param_infos.args.size() == template_param_infos.names.size();
1656 }
1657
1658 clang::ClassTemplateDecl *
1659 SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1660                                          lldb::AccessType access_type,
1661                                          const char *parent_name,
1662                                          int tag_decl_kind,
1663                                          const ClangASTContext::TemplateParameterInfos &template_param_infos)
1664 {
1665     if (template_param_infos.IsValid())
1666     {
1667         std::string template_basename(parent_name);
1668         template_basename.erase (template_basename.find('<'));
1669         ClangASTContext &ast = GetClangASTContext();
1670
1671         return ast.CreateClassTemplateDecl (decl_ctx,
1672                                             access_type,
1673                                             template_basename.c_str(),
1674                                             tag_decl_kind,
1675                                             template_param_infos);
1676     }
1677     return NULL;
1678 }
1679
1680 class SymbolFileDWARF::DelayedAddObjCClassProperty
1681 {
1682 public:
1683     DelayedAddObjCClassProperty
1684     (
1685         const ClangASTType     &class_opaque_type,
1686         const char             *property_name,
1687         const ClangASTType     &property_opaque_type,  // The property type is only required if you don't have an ivar decl
1688         clang::ObjCIvarDecl    *ivar_decl,
1689         const char             *property_setter_name,
1690         const char             *property_getter_name,
1691         uint32_t                property_attributes,
1692         const ClangASTMetadata *metadata
1693     ) :
1694         m_class_opaque_type     (class_opaque_type),
1695         m_property_name         (property_name),
1696         m_property_opaque_type  (property_opaque_type),
1697         m_ivar_decl             (ivar_decl),
1698         m_property_setter_name  (property_setter_name),
1699         m_property_getter_name  (property_getter_name),
1700         m_property_attributes   (property_attributes)
1701     {
1702         if (metadata != NULL)
1703         {
1704             m_metadata_ap.reset(new ClangASTMetadata());
1705             *m_metadata_ap = *metadata;
1706         }
1707     }
1708
1709     DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1710     {
1711         *this = rhs;
1712     }
1713
1714     DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1715     {
1716         m_class_opaque_type    = rhs.m_class_opaque_type;
1717         m_property_name        = rhs.m_property_name;
1718         m_property_opaque_type = rhs.m_property_opaque_type;
1719         m_ivar_decl            = rhs.m_ivar_decl;
1720         m_property_setter_name = rhs.m_property_setter_name;
1721         m_property_getter_name = rhs.m_property_getter_name;
1722         m_property_attributes  = rhs.m_property_attributes;
1723
1724         if (rhs.m_metadata_ap.get())
1725         {
1726             m_metadata_ap.reset (new ClangASTMetadata());
1727             *m_metadata_ap = *rhs.m_metadata_ap;
1728         }
1729         return *this;
1730     }
1731
1732     bool
1733     Finalize()
1734     {
1735         return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1736                                                          m_property_opaque_type,
1737                                                          m_ivar_decl,
1738                                                          m_property_setter_name,
1739                                                          m_property_getter_name,
1740                                                          m_property_attributes,
1741                                                          m_metadata_ap.get());
1742     }
1743 private:
1744     ClangASTType            m_class_opaque_type;
1745     const char             *m_property_name;
1746     ClangASTType            m_property_opaque_type;
1747     clang::ObjCIvarDecl    *m_ivar_decl;
1748     const char             *m_property_setter_name;
1749     const char             *m_property_getter_name;
1750     uint32_t                m_property_attributes;
1751     std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1752 };
1753
1754 struct BitfieldInfo
1755 {
1756     uint64_t bit_size;
1757     uint64_t bit_offset;
1758
1759     BitfieldInfo () :
1760         bit_size (LLDB_INVALID_ADDRESS),
1761         bit_offset (LLDB_INVALID_ADDRESS)
1762     {
1763     }
1764
1765     void
1766     Clear()
1767     {
1768         bit_size = LLDB_INVALID_ADDRESS;
1769         bit_offset = LLDB_INVALID_ADDRESS;
1770     }
1771
1772     bool IsValid ()
1773     {
1774         return (bit_size != LLDB_INVALID_ADDRESS) &&
1775                (bit_offset != LLDB_INVALID_ADDRESS);
1776     }
1777 };
1778
1779
1780 bool
1781 SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1782                                          const DWARFDebugInfoEntry *parent_die)
1783 {
1784     if (parent_die)
1785     {
1786         for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1787         {
1788             dw_tag_t tag = die->Tag();
1789             bool check_virtuality = false;
1790             switch (tag)
1791             {
1792                 case DW_TAG_inheritance:
1793                 case DW_TAG_subprogram:
1794                     check_virtuality = true;
1795                     break;
1796                 default:
1797                     break;
1798             }
1799             if (check_virtuality)
1800             {
1801                 if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1802                     return true;
1803             }
1804         }
1805     }
1806     return false;
1807 }
1808
1809 size_t
1810 SymbolFileDWARF::ParseChildMembers
1811 (
1812     const SymbolContext& sc,
1813     DWARFCompileUnit* dwarf_cu,
1814     const DWARFDebugInfoEntry *parent_die,
1815     ClangASTType &class_clang_type,
1816     const LanguageType class_language,
1817     std::vector<clang::CXXBaseSpecifier *>& base_classes,
1818     std::vector<int>& member_accessibilities,
1819     DWARFDIECollection& member_function_dies,
1820     DelayedPropertyList& delayed_properties,
1821     AccessType& default_accessibility,
1822     bool &is_a_class,
1823     LayoutInfo &layout_info
1824 )
1825 {
1826     if (parent_die == NULL)
1827         return 0;
1828
1829     size_t count = 0;
1830     const DWARFDebugInfoEntry *die;
1831     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
1832     uint32_t member_idx = 0;
1833     BitfieldInfo last_field_info;
1834     ModuleSP module = GetObjectFile()->GetModule();
1835
1836     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1837     {
1838         dw_tag_t tag = die->Tag();
1839
1840         switch (tag)
1841         {
1842         case DW_TAG_member:
1843         case DW_TAG_APPLE_property:
1844             {
1845                 DWARFDebugInfoEntry::Attributes attributes;
1846                 const size_t num_attributes = die->GetAttributes (this,
1847                                                                   dwarf_cu,
1848                                                                   fixed_form_sizes,
1849                                                                   attributes);
1850                 if (num_attributes > 0)
1851                 {
1852                     Declaration decl;
1853                     //DWARFExpression location;
1854                     const char *name = NULL;
1855                     const char *prop_name = NULL;
1856                     const char *prop_getter_name = NULL;
1857                     const char *prop_setter_name = NULL;
1858                     uint32_t prop_attributes = 0;
1859
1860
1861                     bool is_artificial = false;
1862                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1863                     AccessType accessibility = eAccessNone;
1864                     uint32_t member_byte_offset = UINT32_MAX;
1865                     size_t byte_size = 0;
1866                     size_t bit_offset = 0;
1867                     size_t bit_size = 0;
1868                     bool is_external = false; // On DW_TAG_members, this means the member is static
1869                     uint32_t i;
1870                     for (i=0; i<num_attributes && !is_artificial; ++i)
1871                     {
1872                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
1873                         DWARFFormValue form_value;
1874                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1875                         {
1876                             switch (attr)
1877                             {
1878                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1879                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1880                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1881                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1882                             case DW_AT_type:        encoding_uid = form_value.Reference(); break;
1883                             case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1884                             case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1885                             case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1886                             case DW_AT_data_member_location:
1887                                 if (form_value.BlockData())
1888                                 {
1889                                     Value initialValue(0);
1890                                     Value memberOffset(0);
1891                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
1892                                     uint32_t block_length = form_value.Unsigned();
1893                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1894                                     if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1895                                                                   NULL, // ClangExpressionVariableList *
1896                                                                   NULL, // ClangExpressionDeclMap *
1897                                                                   NULL, // RegisterContext *
1898                                                                   module,
1899                                                                   debug_info_data,
1900                                                                   block_offset,
1901                                                                   block_length,
1902                                                                   eRegisterKindDWARF,
1903                                                                   &initialValue,
1904                                                                   memberOffset,
1905                                                                   NULL))
1906                                     {
1907                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1908                                     }
1909                                 }
1910                                 else
1911                                 {
1912                                     // With DWARF 3 and later, if the value is an integer constant,
1913                                     // this form value is the offset in bytes from the beginning
1914                                     // of the containing entity.
1915                                     member_byte_offset = form_value.Unsigned();
1916                                 }
1917                                 break;
1918
1919                             case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1920                             case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1921                             case DW_AT_APPLE_property_name:      prop_name = form_value.AsCString(&get_debug_str_data()); break;
1922                             case DW_AT_APPLE_property_getter:    prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1923                             case DW_AT_APPLE_property_setter:    prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1924                             case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1925                             case DW_AT_external:                 is_external = form_value.Boolean(); break;
1926
1927                             default:
1928                             case DW_AT_declaration:
1929                             case DW_AT_description:
1930                             case DW_AT_mutable:
1931                             case DW_AT_visibility:
1932                             case DW_AT_sibling:
1933                                 break;
1934                             }
1935                         }
1936                     }
1937
1938                     if (prop_name)
1939                     {
1940                         ConstString fixed_getter;
1941                         ConstString fixed_setter;
1942
1943                         // Check if the property getter/setter were provided as full
1944                         // names.  We want basenames, so we extract them.
1945
1946                         if (prop_getter_name && prop_getter_name[0] == '-')
1947                         {
1948                             ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1949                             prop_getter_name = prop_getter_method.GetSelector().GetCString();
1950                         }
1951
1952                         if (prop_setter_name && prop_setter_name[0] == '-')
1953                         {
1954                             ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1955                             prop_setter_name = prop_setter_method.GetSelector().GetCString();
1956                         }
1957
1958                         // If the names haven't been provided, they need to be
1959                         // filled in.
1960
1961                         if (!prop_getter_name)
1962                         {
1963                             prop_getter_name = prop_name;
1964                         }
1965                         if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1966                         {
1967                             StreamString ss;
1968
1969                             ss.Printf("set%c%s:",
1970                                       toupper(prop_name[0]),
1971                                       &prop_name[1]);
1972
1973                             fixed_setter.SetCString(ss.GetData());
1974                             prop_setter_name = fixed_setter.GetCString();
1975                         }
1976                     }
1977
1978                     // Clang has a DWARF generation bug where sometimes it
1979                     // represents fields that are references with bad byte size
1980                     // and bit size/offset information such as:
1981                     //
1982                     //  DW_AT_byte_size( 0x00 )
1983                     //  DW_AT_bit_size( 0x40 )
1984                     //  DW_AT_bit_offset( 0xffffffffffffffc0 )
1985                     //
1986                     // So check the bit offset to make sure it is sane, and if
1987                     // the values are not sane, remove them. If we don't do this
1988                     // then we will end up with a crash if we try to use this
1989                     // type in an expression when clang becomes unhappy with its
1990                     // recycled debug info.
1991
1992                     if (bit_offset > 128)
1993                     {
1994                         bit_size = 0;
1995                         bit_offset = 0;
1996                     }
1997
1998                     // FIXME: Make Clang ignore Objective-C accessibility for expressions
1999                     if (class_language == eLanguageTypeObjC ||
2000                         class_language == eLanguageTypeObjC_plus_plus)
2001                         accessibility = eAccessNone;
2002
2003                     if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
2004                     {
2005                         // Not all compilers will mark the vtable pointer
2006                         // member as artificial (llvm-gcc). We can't have
2007                         // the virtual members in our classes otherwise it
2008                         // throws off all child offsets since we end up
2009                         // having and extra pointer sized member in our
2010                         // class layouts.
2011                         is_artificial = true;
2012                     }
2013
2014                     // Handle static members
2015                     if (is_external && member_byte_offset == UINT32_MAX)
2016                     {
2017                         Type *var_type = ResolveTypeUID(encoding_uid);
2018
2019                         if (var_type)
2020                         {
2021                             if (accessibility == eAccessNone)
2022                                 accessibility = eAccessPublic;
2023                             class_clang_type.AddVariableToRecordType (name,
2024                                                                       var_type->GetClangLayoutType(),
2025                                                                       accessibility);
2026                         }
2027                         break;
2028                     }
2029
2030                     if (is_artificial == false)
2031                     {
2032                         Type *member_type = ResolveTypeUID(encoding_uid);
2033
2034                         clang::FieldDecl *field_decl = NULL;
2035                         if (tag == DW_TAG_member)
2036                         {
2037                             if (member_type)
2038                             {
2039                                 if (accessibility == eAccessNone)
2040                                     accessibility = default_accessibility;
2041                                 member_accessibilities.push_back(accessibility);
2042
2043                                 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
2044                                 if (bit_size > 0)
2045                                 {
2046
2047                                     BitfieldInfo this_field_info;
2048                                     this_field_info.bit_offset = field_bit_offset;
2049                                     this_field_info.bit_size = bit_size;
2050
2051                                     /////////////////////////////////////////////////////////////
2052                                     // How to locate a field given the DWARF debug information
2053                                     //
2054                                     // AT_byte_size indicates the size of the word in which the
2055                                     // bit offset must be interpreted.
2056                                     //
2057                                     // AT_data_member_location indicates the byte offset of the
2058                                     // word from the base address of the structure.
2059                                     //
2060                                     // AT_bit_offset indicates how many bits into the word
2061                                     // (according to the host endianness) the low-order bit of
2062                                     // the field starts.  AT_bit_offset can be negative.
2063                                     //
2064                                     // AT_bit_size indicates the size of the field in bits.
2065                                     /////////////////////////////////////////////////////////////
2066
2067                                     if (byte_size == 0)
2068                                         byte_size = member_type->GetByteSize();
2069
2070                                     if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
2071                                     {
2072                                         this_field_info.bit_offset += byte_size * 8;
2073                                         this_field_info.bit_offset -= (bit_offset + bit_size);
2074                                     }
2075                                     else
2076                                     {
2077                                         this_field_info.bit_offset += bit_offset;
2078                                     }
2079
2080                                     // Update the field bit offset we will report for layout
2081                                     field_bit_offset = this_field_info.bit_offset;
2082
2083                                     // If the member to be emitted did not start on a character boundary and there is
2084                                     // empty space between the last field and this one, then we need to emit an
2085                                     // anonymous member filling up the space up to its start.  There are three cases
2086                                     // here:
2087                                     //
2088                                     // 1 If the previous member ended on a character boundary, then we can emit an
2089                                     //   anonymous member starting at the most recent character boundary.
2090                                     //
2091                                     // 2 If the previous member did not end on a character boundary and the distance
2092                                     //   from the end of the previous member to the current member is less than a
2093                                     //   word width, then we can emit an anonymous member starting right after the
2094                                     //   previous member and right before this member.
2095                                     //
2096                                     // 3 If the previous member did not end on a character boundary and the distance
2097                                     //   from the end of the previous member to the current member is greater than
2098                                     //   or equal a word width, then we act as in Case 1.
2099
2100                                     const uint64_t character_width = 8;
2101                                     const uint64_t word_width = 32;
2102
2103                                     // Objective-C has invalid DW_AT_bit_offset values in older versions
2104                                     // of clang, so we have to be careful and only insert unnamed bitfields
2105                                     // if we have a new enough clang.
2106                                     bool detect_unnamed_bitfields = true;
2107
2108                                     if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
2109                                         detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
2110
2111                                     if (detect_unnamed_bitfields)
2112                                     {
2113                                         BitfieldInfo anon_field_info;
2114
2115                                         if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
2116                                         {
2117                                             uint64_t last_field_end = 0;
2118
2119                                             if (last_field_info.IsValid())
2120                                                 last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
2121
2122                                             if (this_field_info.bit_offset != last_field_end)
2123                                             {
2124                                                 if (((last_field_end % character_width) == 0) ||                    // case 1
2125                                                     (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
2126                                                 {
2127                                                     anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2128                                                     anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2129                                                 }
2130                                                 else                                                                // case 2
2131                                                 {
2132                                                     anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2133                                                     anon_field_info.bit_offset = last_field_end;
2134                                                 }
2135                                             }
2136                                         }
2137
2138                                         if (anon_field_info.IsValid())
2139                                         {
2140                                             clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
2141                                                                                                                              GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
2142                                                                                                                              accessibility,
2143                                                                                                                              anon_field_info.bit_size);
2144
2145                                             layout_info.field_offsets.insert(
2146                                                 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
2147                                         }
2148                                     }
2149                                     last_field_info = this_field_info;
2150                                 }
2151                                 else
2152                                 {
2153                                     last_field_info.Clear();
2154                                 }
2155
2156                                 ClangASTType member_clang_type = member_type->GetClangLayoutType();
2157
2158                                 {
2159                                     // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
2160                                     // If the current field is at the end of the structure, then there is definitely no room for extra
2161                                     // elements and we override the type to array[0].
2162
2163                                     ClangASTType member_array_element_type;
2164                                     uint64_t member_array_size;
2165                                     bool member_array_is_incomplete;
2166
2167                                     if (member_clang_type.IsArrayType(&member_array_element_type,
2168                                                                       &member_array_size,
2169                                                                       &member_array_is_incomplete) &&
2170                                         !member_array_is_incomplete)
2171                                     {
2172                                         uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2173
2174                                         if (member_byte_offset >= parent_byte_size)
2175                                         {
2176                                             if (member_array_size != 1)
2177                                             {
2178                                                 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,
2179                                                                                            MakeUserID(die->GetOffset()),
2180                                                                                            name,
2181                                                                                            encoding_uid,
2182                                                                                            MakeUserID(parent_die->GetOffset()));
2183                                             }
2184
2185                                             member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2186                                         }
2187                                     }
2188                                 }
2189
2190                                 field_decl = class_clang_type.AddFieldToRecordType (name,
2191                                                                                     member_clang_type,
2192                                                                                     accessibility,
2193                                                                                     bit_size);
2194
2195                                 GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2196
2197                                 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
2198                             }
2199                             else
2200                             {
2201                                 if (name)
2202                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2203                                                                                MakeUserID(die->GetOffset()),
2204                                                                                name,
2205                                                                                encoding_uid);
2206                                 else
2207                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2208                                                                                MakeUserID(die->GetOffset()),
2209                                                                                encoding_uid);
2210                             }
2211                         }
2212
2213                         if (prop_name != NULL && member_type)
2214                         {
2215                             clang::ObjCIvarDecl *ivar_decl = NULL;
2216
2217                             if (field_decl)
2218                             {
2219                                 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2220                                 assert (ivar_decl != NULL);
2221                             }
2222
2223                             ClangASTMetadata metadata;
2224                             metadata.SetUserID (MakeUserID(die->GetOffset()));
2225                             delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2226                                                                                      prop_name,
2227                                                                                      member_type->GetClangLayoutType(),
2228                                                                                      ivar_decl,
2229                                                                                      prop_setter_name,
2230                                                                                      prop_getter_name,
2231                                                                                      prop_attributes,
2232                                                                                      &metadata));
2233
2234                             if (ivar_decl)
2235                                 GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2236                         }
2237                     }
2238                 }
2239                 ++member_idx;
2240             }
2241             break;
2242
2243         case DW_TAG_subprogram:
2244             // Let the type parsing code handle this one for us.
2245             member_function_dies.Append (die);
2246             break;
2247
2248         case DW_TAG_inheritance:
2249             {
2250                 is_a_class = true;
2251                 if (default_accessibility == eAccessNone)
2252                     default_accessibility = eAccessPrivate;
2253                 // TODO: implement DW_TAG_inheritance type parsing
2254                 DWARFDebugInfoEntry::Attributes attributes;
2255                 const size_t num_attributes = die->GetAttributes (this,
2256                                                                   dwarf_cu,
2257                                                                   fixed_form_sizes,
2258                                                                   attributes);
2259                 if (num_attributes > 0)
2260                 {
2261                     Declaration decl;
2262                     DWARFExpression location;
2263                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2264                     AccessType accessibility = default_accessibility;
2265                     bool is_virtual = false;
2266                     bool is_base_of_class = true;
2267                     off_t member_byte_offset = 0;
2268                     uint32_t i;
2269                     for (i=0; i<num_attributes; ++i)
2270                     {
2271                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
2272                         DWARFFormValue form_value;
2273                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2274                         {
2275                             switch (attr)
2276                             {
2277                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2278                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
2279                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2280                             case DW_AT_type:        encoding_uid = form_value.Reference(); break;
2281                             case DW_AT_data_member_location:
2282                                 if (form_value.BlockData())
2283                                 {
2284                                     Value initialValue(0);
2285                                     Value memberOffset(0);
2286                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
2287                                     uint32_t block_length = form_value.Unsigned();
2288                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2289                                     if (DWARFExpression::Evaluate (NULL,
2290                                                                    NULL,
2291                                                                    NULL,
2292                                                                    NULL,
2293                                                                    module,
2294                                                                    debug_info_data,
2295                                                                    block_offset,
2296                                                                    block_length,
2297                                                                    eRegisterKindDWARF,
2298                                                                    &initialValue,
2299                                                                    memberOffset,
2300                                                                    NULL))
2301                                     {
2302                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2303                                     }
2304                                 }
2305                                 else
2306                                 {
2307                                     // With DWARF 3 and later, if the value is an integer constant,
2308                                     // this form value is the offset in bytes from the beginning
2309                                     // of the containing entity.
2310                                     member_byte_offset = form_value.Unsigned();
2311                                 }
2312                                 break;
2313
2314                             case DW_AT_accessibility:
2315                                 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2316                                 break;
2317
2318                             case DW_AT_virtuality:
2319                                 is_virtual = form_value.Boolean();
2320                                 break;
2321
2322                             case DW_AT_sibling:
2323                                 break;
2324
2325                             default:
2326                                 break;
2327                             }
2328                         }
2329                     }
2330
2331                     Type *base_class_type = ResolveTypeUID(encoding_uid);
2332                     if (base_class_type == NULL)
2333                     {
2334                         GetObjectFile()->GetModule()->ReportError("0x%8.8x: DW_TAG_inheritance failed to resolve the base class at 0x%8.8" PRIx64 " from enclosing type 0x%8.8x. \nPlease file a bug and attach the file at the start of this error message",
2335                                                                   die->GetOffset(),
2336                                                                   encoding_uid,
2337                                                                   parent_die->GetOffset());
2338                         break;
2339                     }
2340
2341                     ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2342                     assert (base_class_clang_type);
2343                     if (class_language == eLanguageTypeObjC)
2344                     {
2345                         class_clang_type.SetObjCSuperClass(base_class_clang_type);
2346                     }
2347                     else
2348                     {
2349                         base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2350                                                                                                is_virtual,
2351                                                                                                is_base_of_class));
2352
2353                         if (is_virtual)
2354                         {
2355                             // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2356                             // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2357                             // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2358                             //      DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2359                             // Given this, there is really no valid response we can give to clang for virtual base
2360                             // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2361                             // AST source in clang.
2362                         }
2363                         else
2364                         {
2365                             layout_info.base_offsets.insert(
2366                                 std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2367                                                clang::CharUnits::fromQuantity(member_byte_offset)));
2368                         }
2369                     }
2370                 }
2371             }
2372             break;
2373
2374         default:
2375             break;
2376         }
2377     }
2378
2379     return count;
2380 }
2381
2382
2383 clang::DeclContext*
2384 SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2385 {
2386     DWARFDebugInfo* debug_info = DebugInfo();
2387     if (debug_info && UserIDMatches(type_uid))
2388     {
2389         DWARFCompileUnitSP cu_sp;
2390         const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2391         if (die)
2392             return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2393     }
2394     return NULL;
2395 }
2396
2397 clang::DeclContext*
2398 SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2399 {
2400     if (UserIDMatches(type_uid))
2401         return GetClangDeclContextForDIEOffset (sc, type_uid);
2402     return NULL;
2403 }
2404
2405 Type*
2406 SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2407 {
2408     if (UserIDMatches(type_uid))
2409     {
2410         DWARFDebugInfo* debug_info = DebugInfo();
2411         if (debug_info)
2412         {
2413             DWARFCompileUnitSP cu_sp;
2414             const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2415             const bool assert_not_being_parsed = true;
2416             return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2417         }
2418     }
2419     return NULL;
2420 }
2421
2422 Type*
2423 SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2424 {
2425     if (die != NULL)
2426     {
2427         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2428         if (log)
2429             GetObjectFile()->GetModule()->LogMessage (log,
2430                                                       "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2431                                                       die->GetOffset(),
2432                                                       DW_TAG_value_to_name(die->Tag()),
2433                                                       die->GetName(this, cu));
2434
2435         // We might be coming in in the middle of a type tree (a class
2436         // withing a class, an enum within a class), so parse any needed
2437         // parent DIEs before we get to this one...
2438         const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2439         switch (decl_ctx_die->Tag())
2440         {
2441             case DW_TAG_structure_type:
2442             case DW_TAG_union_type:
2443             case DW_TAG_class_type:
2444             {
2445                 // Get the type, which could be a forward declaration
2446                 if (log)
2447                     GetObjectFile()->GetModule()->LogMessage (log,
2448                                                               "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2449                                                               die->GetOffset(),
2450                                                               DW_TAG_value_to_name(die->Tag()),
2451                                                               die->GetName(this, cu),
2452                                                               decl_ctx_die->GetOffset());
2453 //
2454 //                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2455 //                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2456 //                {
2457 //                    if (log)
2458 //                        GetObjectFile()->GetModule()->LogMessage (log,
2459 //                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2460 //                                                                  die->GetOffset(),
2461 //                                                                  DW_TAG_value_to_name(die->Tag()),
2462 //                                                                  die->GetName(this, cu),
2463 //                                                                  decl_ctx_die->GetOffset());
2464 //                    // Ask the type to complete itself if it already hasn't since if we
2465 //                    // want a function (method or static) from a class, the class must
2466 //                    // create itself and add it's own methods and class functions.
2467 //                    if (parent_type)
2468 //                        parent_type->GetClangFullType();
2469 //                }
2470             }
2471             break;
2472
2473             default:
2474                 break;
2475         }
2476         return ResolveType (cu, die);
2477     }
2478     return NULL;
2479 }
2480
2481 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
2482 // SymbolFileDWARF objects to detect if this DWARF file is the one that
2483 // can resolve a clang_type.
2484 bool
2485 SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2486 {
2487     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2488     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2489     return die != NULL;
2490 }
2491
2492
2493 bool
2494 SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2495 {
2496     // We have a struct/union/class/enum that needs to be fully resolved.
2497     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2498     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2499     if (die == NULL)
2500     {
2501         // We have already resolved this type...
2502         return true;
2503     }
2504     // Once we start resolving this type, remove it from the forward declaration
2505     // map in case anyone child members or other types require this type to get resolved.
2506     // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2507     // are done.
2508     m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2509
2510     // Disable external storage for this type so we don't get anymore
2511     // clang::ExternalASTSource queries for this type.
2512     clang_type.SetHasExternalStorage (false);
2513
2514     DWARFDebugInfo* debug_info = DebugInfo();
2515
2516     DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2517     Type *type = m_die_to_type.lookup (die);
2518
2519     const dw_tag_t tag = die->Tag();
2520
2521     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2522     if (log)
2523         GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2524                                                                   "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2525                                                                   MakeUserID(die->GetOffset()),
2526                                                                   DW_TAG_value_to_name(tag),
2527                                                                   type->GetName().AsCString());
2528     assert (clang_type);
2529     DWARFDebugInfoEntry::Attributes attributes;
2530
2531     switch (tag)
2532     {
2533     case DW_TAG_structure_type:
2534     case DW_TAG_union_type:
2535     case DW_TAG_class_type:
2536         {
2537             LayoutInfo layout_info;
2538
2539             {
2540                 if (die->HasChildren())
2541                 {
2542                     LanguageType class_language = eLanguageTypeUnknown;
2543                     if (clang_type.IsObjCObjectOrInterfaceType())
2544                     {
2545                         class_language = eLanguageTypeObjC;
2546                         // For objective C we don't start the definition when
2547                         // the class is created.
2548                         clang_type.StartTagDeclarationDefinition ();
2549                     }
2550
2551                     int tag_decl_kind = -1;
2552                     AccessType default_accessibility = eAccessNone;
2553                     if (tag == DW_TAG_structure_type)
2554                     {
2555                         tag_decl_kind = clang::TTK_Struct;
2556                         default_accessibility = eAccessPublic;
2557                     }
2558                     else if (tag == DW_TAG_union_type)
2559                     {
2560                         tag_decl_kind = clang::TTK_Union;
2561                         default_accessibility = eAccessPublic;
2562                     }
2563                     else if (tag == DW_TAG_class_type)
2564                     {
2565                         tag_decl_kind = clang::TTK_Class;
2566                         default_accessibility = eAccessPrivate;
2567                     }
2568
2569                     SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2570                     std::vector<clang::CXXBaseSpecifier *> base_classes;
2571                     std::vector<int> member_accessibilities;
2572                     bool is_a_class = false;
2573                     // Parse members and base classes first
2574                     DWARFDIECollection member_function_dies;
2575
2576                     DelayedPropertyList delayed_properties;
2577                     ParseChildMembers (sc,
2578                                        dwarf_cu,
2579                                        die,
2580                                        clang_type,
2581                                        class_language,
2582                                        base_classes,
2583                                        member_accessibilities,
2584                                        member_function_dies,
2585                                        delayed_properties,
2586                                        default_accessibility,
2587                                        is_a_class,
2588                                        layout_info);
2589
2590                     // Now parse any methods if there were any...
2591                     size_t num_functions = member_function_dies.Size();
2592                     if (num_functions > 0)
2593                     {
2594                         for (size_t i=0; i<num_functions; ++i)
2595                         {
2596                             ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2597                         }
2598                     }
2599
2600                     if (class_language == eLanguageTypeObjC)
2601                     {
2602                         ConstString class_name (clang_type.GetTypeName());
2603                         if (class_name)
2604                         {
2605                             DIEArray method_die_offsets;
2606                             if (m_using_apple_tables)
2607                             {
2608                                 if (m_apple_objc_ap.get())
2609                                     m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2610                             }
2611                             else
2612                             {
2613                                 if (!m_indexed)
2614                                     Index ();
2615
2616                                 m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2617                             }
2618
2619                             if (!method_die_offsets.empty())
2620                             {
2621                                 DWARFDebugInfo* debug_info = DebugInfo();
2622
2623                                 DWARFCompileUnit* method_cu = NULL;
2624                                 const size_t num_matches = method_die_offsets.size();
2625                                 for (size_t i=0; i<num_matches; ++i)
2626                                 {
2627                                     const dw_offset_t die_offset = method_die_offsets[i];
2628                                     DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2629
2630                                     if (method_die)
2631                                         ResolveType (method_cu, method_die);
2632                                     else
2633                                     {
2634                                         if (m_using_apple_tables)
2635                                         {
2636                                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2637                                                                                                        die_offset, class_name.GetCString());
2638                                         }
2639                                     }
2640                                 }
2641                             }
2642
2643                             for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2644                                  pi != pe;
2645                                  ++pi)
2646                                 pi->Finalize();
2647                         }
2648                     }
2649
2650                     // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2651                     // need to tell the clang type it is actually a class.
2652                     if (class_language != eLanguageTypeObjC)
2653                     {
2654                         if (is_a_class && tag_decl_kind != clang::TTK_Class)
2655                             clang_type.SetTagTypeKind (clang::TTK_Class);
2656                     }
2657
2658                     // Since DW_TAG_structure_type gets used for both classes
2659                     // and structures, we may need to set any DW_TAG_member
2660                     // fields to have a "private" access if none was specified.
2661                     // When we parsed the child members we tracked that actual
2662                     // accessibility value for each DW_TAG_member in the
2663                     // "member_accessibilities" array. If the value for the
2664                     // member is zero, then it was set to the "default_accessibility"
2665                     // which for structs was "public". Below we correct this
2666                     // by setting any fields to "private" that weren't correctly
2667                     // set.
2668                     if (is_a_class && !member_accessibilities.empty())
2669                     {
2670                         // This is a class and all members that didn't have
2671                         // their access specified are private.
2672                         clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2673                                                                     &member_accessibilities.front(),
2674                                                                     member_accessibilities.size());
2675                     }
2676
2677                     if (!base_classes.empty())
2678                     {
2679                         // Make sure all base classes refer to complete types and not
2680                         // forward declarations. If we don't do this, clang will crash
2681                         // with an assertion in the call to clang_type.SetBaseClassesForClassType()
2682                         bool base_class_error = false;
2683                         for (auto &base_class : base_classes)
2684                         {
2685                             clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
2686                             if (type_source_info)
2687                             {
2688                                 ClangASTType base_class_type (GetClangASTContext().getASTContext(), type_source_info->getType());
2689                                 if (base_class_type.GetCompleteType() == false)
2690                                 {
2691                                     if (!base_class_error)
2692                                     {
2693                                         GetObjectFile()->GetModule()->ReportError ("DWARF DIE at 0x%8.8x for class '%s' has a base class '%s' that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
2694                                                                                    die->GetOffset(),
2695                                                                                    die->GetName(this, dwarf_cu),
2696                                                                                    base_class_type.GetTypeName().GetCString(),
2697                                                                                    sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
2698                                     }
2699                                     // We have no choice other than to pretend that the base class
2700                                     // is complete. If we don't do this, clang will crash when we
2701                                     // call setBases() inside of "clang_type.SetBaseClassesForClassType()"
2702                                     // below. Since we provide layout assistance, all ivars in this
2703                                     // class and other classes will be fine, this is the best we can do
2704                                     // short of crashing.
2705                                     base_class_type.StartTagDeclarationDefinition ();
2706                                     base_class_type.CompleteTagDeclarationDefinition ();
2707                                 }
2708                             }
2709                         }
2710                         clang_type.SetBaseClassesForClassType (&base_classes.front(),
2711                                                                base_classes.size());
2712
2713                         // Clang will copy each CXXBaseSpecifier in "base_classes"
2714                         // so we have to free them all.
2715                         ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2716                                                                  base_classes.size());
2717                     }
2718                 }
2719             }
2720
2721             clang_type.BuildIndirectFields ();
2722             clang_type.CompleteTagDeclarationDefinition ();
2723
2724             if (!layout_info.field_offsets.empty() ||
2725                 !layout_info.base_offsets.empty()  ||
2726                 !layout_info.vbase_offsets.empty() )
2727             {
2728                 if (type)
2729                     layout_info.bit_size = type->GetByteSize() * 8;
2730                 if (layout_info.bit_size == 0)
2731                     layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2732
2733                 clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2734                 if (record_decl)
2735                 {
2736                     if (log)
2737                     {
2738                         GetObjectFile()->GetModule()->LogMessage (log,
2739                                                                   "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])",
2740                                                                   static_cast<void*>(clang_type.GetOpaqueQualType()),
2741                                                                   static_cast<void*>(record_decl),
2742                                                                   layout_info.bit_size,
2743                                                                   layout_info.alignment,
2744                                                                   static_cast<uint32_t>(layout_info.field_offsets.size()),
2745                                                                   static_cast<uint32_t>(layout_info.base_offsets.size()),
2746                                                                   static_cast<uint32_t>(layout_info.vbase_offsets.size()));
2747
2748                         uint32_t idx;
2749                         {
2750                             llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos,
2751                                 end = layout_info.field_offsets.end();
2752                             for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2753                         {
2754                             GetObjectFile()->GetModule()->LogMessage(
2755                                 log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = "
2756                                      "{ bit_offset=%u, name='%s' }",
2757                                 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2758                                 static_cast<uint32_t>(pos->second), pos->first->getNameAsString().c_str());
2759                         }
2760                         }
2761
2762                         {
2763                             llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos,
2764                                 base_end = layout_info.base_offsets.end();
2765                             for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end;
2766                                  ++base_pos, ++idx)
2767                             {
2768                                 GetObjectFile()->GetModule()->LogMessage(
2769                                     log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] "
2770                                          "= { byte_offset=%u, name='%s' }",
2771                                     clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(),
2772                                     base_pos->first->getNameAsString().c_str());
2773                             }
2774                         }
2775                         {
2776                             llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos,
2777                                 vbase_end = layout_info.vbase_offsets.end();
2778                             for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end;
2779                                  ++vbase_pos, ++idx)
2780                             {
2781                                 GetObjectFile()->GetModule()->LogMessage(
2782                                     log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) "
2783                                          "vbase[%u] = { byte_offset=%u, name='%s' }",
2784                                     static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2785                                     static_cast<uint32_t>(vbase_pos->second.getQuantity()),
2786                                     vbase_pos->first->getNameAsString().c_str());
2787                             }
2788                         }
2789                     }
2790                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2791                 }
2792             }
2793         }
2794
2795         return (bool)clang_type;
2796
2797     case DW_TAG_enumeration_type:
2798         clang_type.StartTagDeclarationDefinition ();
2799         if (die->HasChildren())
2800         {
2801             SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2802             bool is_signed = false;
2803             clang_type.IsIntegerType(is_signed);
2804             ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2805         }
2806         clang_type.CompleteTagDeclarationDefinition ();
2807         return (bool)clang_type;
2808
2809     default:
2810         assert(false && "not a forward clang type decl!");
2811         break;
2812     }
2813     return false;
2814 }
2815
2816 Type*
2817 SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2818 {
2819     if (type_die != NULL)
2820     {
2821         Type *type = m_die_to_type.lookup (type_die);
2822
2823         if (type == NULL)
2824             type = GetTypeForDIE (dwarf_cu, type_die).get();
2825
2826         if (assert_not_being_parsed)
2827         {
2828             if (type != DIE_IS_BEING_PARSED)
2829                 return type;
2830
2831             GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2832                                                        type_die->GetOffset(),
2833                                                        DW_TAG_value_to_name(type_die->Tag()),
2834                                                        type_die->GetName(this, dwarf_cu));
2835
2836         }
2837         else
2838             return type;
2839     }
2840     return NULL;
2841 }
2842
2843 CompileUnit*
2844 SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2845 {
2846     // Check if the symbol vendor already knows about this compile unit?
2847     if (dwarf_cu->GetUserData() == NULL)
2848     {
2849         // The symbol vendor doesn't know about this compile unit, we
2850         // need to parse and add it to the symbol vendor object.
2851         return ParseCompileUnit(dwarf_cu, cu_idx).get();
2852     }
2853     return (CompileUnit*)dwarf_cu->GetUserData();
2854 }
2855
2856 bool
2857 SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2858 {
2859     sc.Clear(false);
2860     // Check if the symbol vendor already knows about this compile unit?
2861     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2862
2863     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2864     if (sc.function == NULL)
2865         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2866
2867     if (sc.function)
2868     {
2869         sc.module_sp = sc.function->CalculateSymbolContextModule();
2870         return true;
2871     }
2872
2873     return false;
2874 }
2875
2876 void
2877 SymbolFileDWARF::UpdateExternalModuleListIfNeeded()
2878 {
2879     if (m_fetched_external_modules)
2880         return;
2881     m_fetched_external_modules = true;
2882
2883     DWARFDebugInfo * debug_info = DebugInfo();
2884     debug_info->GetNumCompileUnits();
2885
2886     const uint32_t num_compile_units = GetNumCompileUnits();
2887     for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
2888     {
2889         DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2890
2891         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
2892         if (die && die->HasChildren() == false)
2893         {
2894             const uint64_t name_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_name, UINT64_MAX);
2895             const uint64_t dwo_path_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_GNU_dwo_name, UINT64_MAX);
2896
2897             if (name_strp != UINT64_MAX)
2898             {
2899                 if (m_external_type_modules.find(dwo_path_strp) == m_external_type_modules.end())
2900                 {
2901                     const char *name = get_debug_str_data().PeekCStr(name_strp);
2902                     const char *dwo_path = get_debug_str_data().PeekCStr(dwo_path_strp);
2903                     if (name || dwo_path)
2904                     {
2905                         ModuleSP module_sp;
2906                         if (dwo_path)
2907                         {
2908                             ModuleSpec dwo_module_spec;
2909                             dwo_module_spec.GetFileSpec().SetFile(dwo_path, false);
2910                             dwo_module_spec.GetArchitecture() = m_obj_file->GetModule()->GetArchitecture();
2911                             //printf ("Loading dwo = '%s'\n", dwo_path);
2912                             Error error = ModuleList::GetSharedModule (dwo_module_spec, module_sp, NULL, NULL, NULL);
2913                         }
2914
2915                         if (dwo_path_strp != LLDB_INVALID_UID)
2916                         {
2917                             m_external_type_modules[dwo_path_strp] = ClangModuleInfo { ConstString(name), module_sp };
2918                         }
2919                         else
2920                         {
2921                             // This hack should be removed promptly once clang emits both.
2922                             m_external_type_modules[name_strp] = ClangModuleInfo { ConstString(name), module_sp };
2923                         }
2924                     }
2925                 }
2926             }
2927         }
2928     }
2929 }
2930
2931 SymbolFileDWARF::GlobalVariableMap &
2932 SymbolFileDWARF::GetGlobalAranges()
2933 {
2934     if (!m_global_aranges_ap)
2935     {
2936         m_global_aranges_ap.reset (new GlobalVariableMap());
2937
2938         ModuleSP module_sp = GetObjectFile()->GetModule();
2939         if (module_sp)
2940         {
2941             const size_t num_cus = module_sp->GetNumCompileUnits();
2942             for (size_t i = 0; i < num_cus; ++i)
2943             {
2944                 CompUnitSP cu_sp = module_sp->GetCompileUnitAtIndex(i);
2945                 if (cu_sp)
2946                 {
2947                     VariableListSP globals_sp = cu_sp->GetVariableList(true);
2948                     if (globals_sp)
2949                     {
2950                         const size_t num_globals = globals_sp->GetSize();
2951                         for (size_t g = 0; g < num_globals; ++g)
2952                         {
2953                             VariableSP var_sp = globals_sp->GetVariableAtIndex(g);
2954                             if (var_sp && !var_sp->GetLocationIsConstantValueData())
2955                             {
2956                                 const DWARFExpression &location = var_sp->LocationExpression();
2957                                 Value location_result;
2958                                 Error error;
2959                                 if (location.Evaluate(NULL, NULL, NULL, LLDB_INVALID_ADDRESS, NULL, location_result, &error))
2960                                 {
2961                                     if (location_result.GetValueType() == Value::eValueTypeFileAddress)
2962                                     {
2963                                         lldb::addr_t file_addr = location_result.GetScalar().ULongLong();
2964                                         lldb::addr_t byte_size = 1;
2965                                         if (var_sp->GetType())
2966                                             byte_size = var_sp->GetType()->GetByteSize();
2967                                         m_global_aranges_ap->Append(GlobalVariableMap::Entry(file_addr, byte_size, var_sp.get()));
2968                                     }
2969                                 }
2970                             }
2971                         }
2972                     }
2973                 }
2974             }
2975         }
2976         m_global_aranges_ap->Sort();
2977     }
2978     return *m_global_aranges_ap;
2979 }
2980
2981
2982 uint32_t
2983 SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2984 {
2985     Timer scoped_timer(__PRETTY_FUNCTION__,
2986                        "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2987                        static_cast<void*>(so_addr.GetSection().get()),
2988                        so_addr.GetOffset(), resolve_scope);
2989     uint32_t resolved = 0;
2990     if (resolve_scope & (   eSymbolContextCompUnit  |
2991                             eSymbolContextFunction  |
2992                             eSymbolContextBlock     |
2993                             eSymbolContextLineEntry |
2994                             eSymbolContextVariable  ))
2995     {
2996         lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2997
2998         DWARFDebugInfo* debug_info = DebugInfo();
2999         if (debug_info)
3000         {
3001             const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
3002             if (cu_offset == DW_INVALID_OFFSET)
3003             {
3004                 // Global variables are not in the compile unit address ranges. The only way to
3005                 // currently find global variables is to iterate over the .debug_pubnames or the
3006                 // __apple_names table and find all items in there that point to DW_TAG_variable
3007                 // DIEs and then find the address that matches.
3008                 if (resolve_scope & eSymbolContextVariable)
3009                 {
3010                     GlobalVariableMap &map = GetGlobalAranges();
3011                     const GlobalVariableMap::Entry *entry = map.FindEntryThatContains(file_vm_addr);
3012                     if (entry && entry->data)
3013                     {
3014                         Variable *variable = entry->data;
3015                         SymbolContextScope *scc = variable->GetSymbolContextScope();
3016                         if (scc)
3017                         {
3018                             scc->CalculateSymbolContext(&sc);
3019                             sc.variable = variable;
3020                         }
3021                         return sc.GetResolvedMask();
3022                     }
3023                 }
3024             }
3025             else
3026             {
3027                 uint32_t cu_idx = DW_INVALID_INDEX;
3028                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
3029                 if (dwarf_cu)
3030                 {
3031                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3032                     if (sc.comp_unit)
3033                     {
3034                         resolved |= eSymbolContextCompUnit;
3035
3036                         bool force_check_line_table = false;
3037                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
3038                         {
3039                             DWARFDebugInfoEntry *function_die = NULL;
3040                             DWARFDebugInfoEntry *block_die = NULL;
3041                             if (resolve_scope & eSymbolContextBlock)
3042                             {
3043                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
3044                             }
3045                             else
3046                             {
3047                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
3048                             }
3049
3050                             if (function_die != NULL)
3051                             {
3052                                 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
3053                                 if (sc.function == NULL)
3054                                     sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
3055                             }
3056                             else
3057                             {
3058                                 // We might have had a compile unit that had discontiguous
3059                                 // address ranges where the gaps are symbols that don't have
3060                                 // any debug info. Discontiguous compile unit address ranges
3061                                 // should only happen when there aren't other functions from
3062                                 // other compile units in these gaps. This helps keep the size
3063                                 // of the aranges down.
3064                                 force_check_line_table = true;
3065                             }
3066
3067                             if (sc.function != NULL)
3068                             {
3069                                 resolved |= eSymbolContextFunction;
3070
3071                                 if (resolve_scope & eSymbolContextBlock)
3072                                 {
3073                                     Block& block = sc.function->GetBlock (true);
3074
3075                                     if (block_die != NULL)
3076                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
3077                                     else
3078                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
3079                                     if (sc.block)
3080                                         resolved |= eSymbolContextBlock;
3081                                 }
3082                             }
3083                         }
3084
3085                         if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
3086                         {
3087                             LineTable *line_table = sc.comp_unit->GetLineTable();
3088                             if (line_table != NULL)
3089                             {
3090                                 // And address that makes it into this function should be in terms
3091                                 // of this debug file if there is no debug map, or it will be an
3092                                 // address in the .o file which needs to be fixed up to be in terms
3093                                 // of the debug map executable. Either way, calling FixupAddress()
3094                                 // will work for us.
3095                                 Address exe_so_addr (so_addr);
3096                                 if (FixupAddress(exe_so_addr))
3097                                 {
3098                                     if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
3099                                     {
3100                                         resolved |= eSymbolContextLineEntry;
3101                                     }
3102                                 }
3103                             }
3104                         }
3105
3106                         if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
3107                         {
3108                             // We might have had a compile unit that had discontiguous
3109                             // address ranges where the gaps are symbols that don't have
3110                             // any debug info. Discontiguous compile unit address ranges
3111                             // should only happen when there aren't other functions from
3112                             // other compile units in these gaps. This helps keep the size
3113                             // of the aranges down.
3114                             sc.comp_unit = NULL;
3115                             resolved &= ~eSymbolContextCompUnit;
3116                         }
3117                     }
3118                     else
3119                     {
3120                         GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
3121                                                                      cu_offset,
3122                                                                      cu_idx);
3123                     }
3124                 }
3125             }
3126         }
3127     }
3128     return resolved;
3129 }
3130
3131
3132
3133 uint32_t
3134 SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
3135 {
3136     const uint32_t prev_size = sc_list.GetSize();
3137     if (resolve_scope & eSymbolContextCompUnit)
3138     {
3139         DWARFDebugInfo* debug_info = DebugInfo();
3140         if (debug_info)
3141         {
3142             uint32_t cu_idx;
3143             DWARFCompileUnit* dwarf_cu = NULL;
3144
3145             for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
3146             {
3147                 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3148                 const bool full_match = (bool)file_spec.GetDirectory();
3149                 bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
3150                 if (check_inlines || file_spec_matches_cu_file_spec)
3151                 {
3152                     SymbolContext sc (m_obj_file->GetModule());
3153                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3154                     if (sc.comp_unit)
3155                     {
3156                         uint32_t file_idx = UINT32_MAX;
3157
3158                         // If we are looking for inline functions only and we don't
3159                         // find it in the support files, we are done.
3160                         if (check_inlines)
3161                         {
3162                             file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
3163                             if (file_idx == UINT32_MAX)
3164                                 continue;
3165                         }
3166
3167                         if (line != 0)
3168                         {
3169                             LineTable *line_table = sc.comp_unit->GetLineTable();
3170
3171                             if (line_table != NULL && line != 0)
3172                             {
3173                                 // We will have already looked up the file index if
3174                                 // we are searching for inline entries.
3175                                 if (!check_inlines)
3176                                     file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
3177
3178                                 if (file_idx != UINT32_MAX)
3179                                 {
3180                                     uint32_t found_line;
3181                                     uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
3182                                     found_line = sc.line_entry.line;
3183
3184                                     while (line_idx != UINT32_MAX)
3185                                     {
3186                                         sc.function = NULL;
3187                                         sc.block = NULL;
3188                                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
3189                                         {
3190                                             const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
3191                                             if (file_vm_addr != LLDB_INVALID_ADDRESS)
3192                                             {
3193                                                 DWARFDebugInfoEntry *function_die = NULL;
3194                                                 DWARFDebugInfoEntry *block_die = NULL;
3195                                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
3196
3197                                                 if (function_die != NULL)
3198                                                 {
3199                                                     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
3200                                                     if (sc.function == NULL)
3201                                                         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
3202                                                 }
3203
3204                                                 if (sc.function != NULL)
3205                                                 {
3206                                                     Block& block = sc.function->GetBlock (true);
3207
3208                                                     if (block_die != NULL)
3209                                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
3210                                                     else if (function_die != NULL)
3211                                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
3212                                                 }
3213                                             }
3214                                         }
3215
3216                                         sc_list.Append(sc);
3217                                         line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
3218                                     }
3219                                 }
3220                             }
3221                             else if (file_spec_matches_cu_file_spec && !check_inlines)
3222                             {
3223                                 // only append the context if we aren't looking for inline call sites
3224                                 // by file and line and if the file spec matches that of the compile unit
3225                                 sc_list.Append(sc);
3226                             }
3227                         }
3228                         else if (file_spec_matches_cu_file_spec && !check_inlines)
3229                         {
3230                             // only append the context if we aren't looking for inline call sites
3231                             // by file and line and if the file spec matches that of the compile unit
3232                             sc_list.Append(sc);
3233                         }
3234
3235                         if (!check_inlines)
3236                             break;
3237                     }
3238                 }
3239             }
3240         }
3241     }
3242     return sc_list.GetSize() - prev_size;
3243 }
3244
3245 void
3246 SymbolFileDWARF::Index ()
3247 {
3248     if (m_indexed)
3249         return;
3250     m_indexed = true;
3251     Timer scoped_timer (__PRETTY_FUNCTION__,
3252                         "SymbolFileDWARF::Index (%s)",
3253                         GetObjectFile()->GetFileSpec().GetFilename().AsCString("<Unknown>"));
3254
3255     DWARFDebugInfo* debug_info = DebugInfo();
3256     if (debug_info)
3257     {
3258         uint32_t cu_idx = 0;
3259         const uint32_t num_compile_units = GetNumCompileUnits();
3260         for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
3261         {
3262             DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
3263
3264             bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
3265
3266             dwarf_cu->Index (cu_idx,
3267                              m_function_basename_index,
3268                              m_function_fullname_index,
3269                              m_function_method_index,
3270                              m_function_selector_index,
3271                              m_objc_class_selectors_index,
3272                              m_global_index,
3273                              m_type_index,
3274                              m_namespace_index);
3275
3276             // Keep memory down by clearing DIEs if this generate function
3277             // caused them to be parsed
3278             if (clear_dies)
3279                 dwarf_cu->ClearDIEs (true);
3280         }
3281
3282         m_function_basename_index.Finalize();
3283         m_function_fullname_index.Finalize();
3284         m_function_method_index.Finalize();
3285         m_function_selector_index.Finalize();
3286         m_objc_class_selectors_index.Finalize();
3287         m_global_index.Finalize();
3288         m_type_index.Finalize();
3289         m_namespace_index.Finalize();
3290
3291 #if defined (ENABLE_DEBUG_PRINTF)
3292         StreamFile s(stdout, false);
3293         s.Printf ("DWARF index for '%s':",
3294                   GetObjectFile()->GetFileSpec().GetPath().c_str());
3295         s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
3296         s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
3297         s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
3298         s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
3299         s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
3300         s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
3301         s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
3302         s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
3303 #endif
3304     }
3305 }
3306
3307 bool
3308 SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3309 {
3310     if (namespace_decl == NULL)
3311     {
3312         // Invalid namespace decl which means we aren't matching only things
3313         // in this symbol file, so return true to indicate it matches this
3314         // symbol file.
3315         return true;
3316     }
3317
3318     clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3319
3320     if (namespace_ast == NULL)
3321         return true;    // No AST in the "namespace_decl", return true since it
3322                         // could then match any symbol file, including this one
3323
3324     if (namespace_ast == GetClangASTContext().getASTContext())
3325         return true;    // The ASTs match, return true
3326
3327     // The namespace AST was valid, and it does not match...
3328     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3329
3330     if (log)
3331         GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3332
3333     return false;
3334 }
3335
3336 bool
3337 SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3338                                    DWARFCompileUnit* cu,
3339                                    const DWARFDebugInfoEntry* die)
3340 {
3341     // No namespace specified, so the answer is
3342     if (namespace_decl == NULL)
3343         return true;
3344
3345     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3346
3347     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3348     clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3349     if (decl_ctx_die)
3350     {
3351         clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3352
3353         if (clang_namespace_decl)
3354         {
3355             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3356             {
3357                 if (log)
3358                     GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3359                 return false;
3360             }
3361
3362             if (clang_namespace_decl == die_clang_decl_ctx)
3363                 return true;
3364             else
3365                 return false;
3366         }
3367         else
3368         {
3369             // We have a namespace_decl that was not NULL but it contained
3370             // a NULL "clang::NamespaceDecl", so this means the global namespace
3371             // So as long the contained decl context DIE isn't a namespace
3372             // we should be ok.
3373             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3374                 return true;
3375         }
3376     }
3377
3378     if (log)
3379         GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3380
3381     return false;
3382 }
3383 uint32_t
3384 SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3385 {
3386     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3387
3388     if (log)
3389         GetObjectFile()->GetModule()->LogMessage (log,
3390                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3391                                                   name.GetCString(),
3392                                                   static_cast<const void*>(namespace_decl),
3393                                                   append, max_matches);
3394
3395     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3396         return 0;
3397
3398     DWARFDebugInfo* info = DebugInfo();
3399     if (info == NULL)
3400         return 0;
3401
3402     // If we aren't appending the results to this list, then clear the list
3403     if (!append)
3404         variables.Clear();
3405
3406     // Remember how many variables are in the list before we search in case
3407     // we are appending the results to a variable list.
3408     const uint32_t original_size = variables.GetSize();
3409
3410     DIEArray die_offsets;
3411
3412     if (m_using_apple_tables)
3413     {
3414         if (m_apple_names_ap.get())
3415         {
3416             const char *name_cstr = name.GetCString();
3417             llvm::StringRef basename;
3418             llvm::StringRef context;
3419
3420             if (!CPPLanguageRuntime::ExtractContextAndIdentifier(name_cstr, context, basename))
3421                 basename = name_cstr;
3422
3423             m_apple_names_ap->FindByName (basename.data(), die_offsets);
3424         }
3425     }
3426     else
3427     {
3428         // Index the DWARF if we haven't already
3429         if (!m_indexed)
3430             Index ();
3431
3432         m_global_index.Find (name, die_offsets);
3433     }
3434
3435     const size_t num_die_matches = die_offsets.size();
3436     if (num_die_matches)
3437     {
3438         SymbolContext sc;
3439         sc.module_sp = m_obj_file->GetModule();
3440         assert (sc.module_sp);
3441
3442         DWARFDebugInfo* debug_info = DebugInfo();
3443         DWARFCompileUnit* dwarf_cu = NULL;
3444         const DWARFDebugInfoEntry* die = NULL;
3445         bool done = false;
3446         for (size_t i=0; i<num_die_matches && !done; ++i)
3447         {
3448             const dw_offset_t die_offset = die_offsets[i];
3449             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3450
3451             if (die)
3452             {
3453                 switch (die->Tag())
3454                 {
3455                     default:
3456                     case DW_TAG_subprogram:
3457                     case DW_TAG_inlined_subroutine:
3458                     case DW_TAG_try_block:
3459                     case DW_TAG_catch_block:
3460                         break;
3461
3462                     case DW_TAG_variable:
3463                         {
3464                             sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3465
3466                             if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3467                                 continue;
3468
3469                             ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3470
3471                             if (variables.GetSize() - original_size >= max_matches)
3472                                 done = true;
3473                         }
3474                         break;
3475                 }
3476             }
3477             else
3478             {
3479                 if (m_using_apple_tables)
3480                 {
3481                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3482                                                                                die_offset, name.GetCString());
3483                 }
3484             }
3485         }
3486     }
3487
3488     // Return the number of variable that were appended to the list
3489     const uint32_t num_matches = variables.GetSize() - original_size;
3490     if (log && num_matches > 0)
3491     {
3492         GetObjectFile()->GetModule()->LogMessage (log,
3493                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3494                                                   name.GetCString(),
3495                                                   static_cast<const void*>(namespace_decl),
3496                                                   append, max_matches,
3497                                                   num_matches);
3498     }
3499     return num_matches;
3500 }
3501
3502 uint32_t
3503 SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3504 {
3505     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3506
3507     if (log)
3508     {
3509         GetObjectFile()->GetModule()->LogMessage (log,
3510                                                   "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3511                                                   regex.GetText(), append,
3512                                                   max_matches);
3513     }
3514
3515     DWARFDebugInfo* info = DebugInfo();
3516     if (info == NULL)
3517         return 0;
3518
3519     // If we aren't appending the results to this list, then clear the list
3520     if (!append)
3521         variables.Clear();
3522
3523     // Remember how many variables are in the list before we search in case
3524     // we are appending the results to a variable list.
3525     const uint32_t original_size = variables.GetSize();
3526
3527     DIEArray die_offsets;
3528
3529     if (m_using_apple_tables)
3530     {
3531         if (m_apple_names_ap.get())
3532         {
3533             DWARFMappedHash::DIEInfoArray hash_data_array;
3534             if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3535                 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3536         }
3537     }
3538     else
3539     {
3540         // Index the DWARF if we haven't already
3541         if (!m_indexed)
3542             Index ();
3543
3544         m_global_index.Find (regex, die_offsets);
3545     }
3546
3547     SymbolContext sc;
3548     sc.module_sp = m_obj_file->GetModule();
3549     assert (sc.module_sp);
3550
3551     DWARFCompileUnit* dwarf_cu = NULL;
3552     const DWARFDebugInfoEntry* die = NULL;
3553     const size_t num_matches = die_offsets.size();
3554     if (num_matches)
3555     {
3556         DWARFDebugInfo* debug_info = DebugInfo();
3557         for (size_t i=0; i<num_matches; ++i)
3558         {
3559             const dw_offset_t die_offset = die_offsets[i];
3560             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3561
3562             if (die)
3563             {
3564                 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3565
3566                 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3567
3568                 if (variables.GetSize() - original_size >= max_matches)
3569                     break;
3570             }
3571             else
3572             {
3573                 if (m_using_apple_tables)
3574                 {
3575                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3576                                                                                die_offset, regex.GetText());
3577                 }
3578             }
3579         }
3580     }
3581
3582     // Return the number of variable that were appended to the list
3583     return variables.GetSize() - original_size;
3584 }
3585
3586
3587 bool
3588 SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3589                                   DWARFCompileUnit *&dwarf_cu,
3590                                   bool include_inlines,
3591                                   SymbolContextList& sc_list)
3592 {
3593     const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3594     return ResolveFunction (dwarf_cu, die, include_inlines, sc_list);
3595 }
3596
3597
3598 bool
3599 SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3600                                   const DWARFDebugInfoEntry *die,
3601                                   bool include_inlines,
3602                                   SymbolContextList& sc_list)
3603 {
3604     SymbolContext sc;
3605
3606     if (die == NULL)
3607         return false;
3608
3609     // If we were passed a die that is not a function, just return false...
3610     if (! (die->Tag() == DW_TAG_subprogram || (include_inlines && die->Tag() == DW_TAG_inlined_subroutine)))
3611         return false;
3612
3613     const DWARFDebugInfoEntry* inlined_die = NULL;
3614     if (die->Tag() == DW_TAG_inlined_subroutine)
3615     {
3616         inlined_die = die;
3617
3618         while ((die = die->GetParent()) != NULL)
3619         {
3620             if (die->Tag() == DW_TAG_subprogram)
3621                 break;
3622         }
3623     }
3624     assert (die && die->Tag() == DW_TAG_subprogram);
3625     if (GetFunction (cu, die, sc))
3626     {
3627         Address addr;
3628         // Parse all blocks if needed
3629         if (inlined_die)
3630         {
3631             Block &function_block = sc.function->GetBlock (true);
3632             sc.block = function_block.FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3633             if (sc.block == NULL)
3634                 sc.block = function_block.FindBlockByID (inlined_die->GetOffset());
3635             if (sc.block == NULL || sc.block->GetStartAddress (addr) == false)
3636                 addr.Clear();
3637         }
3638         else
3639         {
3640             sc.block = NULL;
3641             addr = sc.function->GetAddressRange().GetBaseAddress();
3642         }
3643
3644         if (addr.IsValid())
3645         {
3646             sc_list.Append(sc);
3647             return true;
3648         }
3649     }
3650
3651     return false;
3652 }
3653
3654 void
3655 SymbolFileDWARF::FindFunctions (const ConstString &name,
3656                                 const NameToDIE &name_to_die,
3657                                 bool include_inlines,
3658                                 SymbolContextList& sc_list)
3659 {
3660     DIEArray die_offsets;
3661     if (name_to_die.Find (name, die_offsets))
3662     {
3663         ParseFunctions (die_offsets, include_inlines, sc_list);
3664     }
3665 }
3666
3667
3668 void
3669 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3670                                 const NameToDIE &name_to_die,
3671                                 bool include_inlines,
3672                                 SymbolContextList& sc_list)
3673 {
3674     DIEArray die_offsets;
3675     if (name_to_die.Find (regex, die_offsets))
3676     {
3677         ParseFunctions (die_offsets, include_inlines, sc_list);
3678     }
3679 }
3680
3681
3682 void
3683 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3684                                 const DWARFMappedHash::MemoryTable &memory_table,
3685                                 bool include_inlines,
3686                                 SymbolContextList& sc_list)
3687 {
3688     DIEArray die_offsets;
3689     DWARFMappedHash::DIEInfoArray hash_data_array;
3690     if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3691     {
3692         DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3693         ParseFunctions (die_offsets, include_inlines, sc_list);
3694     }
3695 }
3696
3697 void
3698 SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3699                                  bool include_inlines,
3700                                  SymbolContextList& sc_list)
3701 {
3702     const size_t num_matches = die_offsets.size();
3703     if (num_matches)
3704     {
3705         DWARFCompileUnit* dwarf_cu = NULL;
3706         for (size_t i=0; i<num_matches; ++i)
3707         {
3708             const dw_offset_t die_offset = die_offsets[i];
3709             ResolveFunction (die_offset, dwarf_cu, include_inlines, sc_list);
3710         }
3711     }
3712 }
3713
3714 bool
3715 SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3716                                                 const DWARFCompileUnit *dwarf_cu,
3717                                                 uint32_t name_type_mask,
3718                                                 const char *partial_name,
3719                                                 const char *base_name_start,
3720                                                 const char *base_name_end)
3721 {
3722     // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3723     if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3724     {
3725         clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3726         if (!containing_decl_ctx)
3727             return false;
3728
3729         bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3730
3731         if (name_type_mask == eFunctionNameTypeMethod)
3732         {
3733             if (is_cxx_method == false)
3734                 return false;
3735         }
3736
3737         if (name_type_mask == eFunctionNameTypeBase)
3738         {
3739             if (is_cxx_method == true)
3740                 return false;
3741         }
3742     }
3743
3744     // Now we need to check whether the name we got back for this type matches the extra specifications
3745     // that were in the name we're looking up:
3746     if (base_name_start != partial_name || *base_name_end != '\0')
3747     {
3748         // First see if the stuff to the left matches the full name.  To do that let's see if
3749         // we can pull out the mips linkage name attribute:
3750
3751         Mangled best_name;
3752         DWARFDebugInfoEntry::Attributes attributes;
3753         DWARFFormValue form_value;
3754         die->GetAttributes(this, dwarf_cu, NULL, attributes);
3755         uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3756         if (idx == UINT32_MAX)
3757             idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3758         if (idx != UINT32_MAX)
3759         {
3760             if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3761             {
3762                 const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3763                 if (mangled_name)
3764                     best_name.SetValue (ConstString(mangled_name), true);
3765             }
3766         }
3767
3768         if (!best_name)
3769         {
3770             idx = attributes.FindAttributeIndex(DW_AT_name);
3771             if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3772             {
3773                 const char *name = form_value.AsCString(&get_debug_str_data());
3774                 best_name.SetValue (ConstString(name), false);
3775             }
3776         }
3777
3778         const LanguageType cu_language = const_cast<DWARFCompileUnit *>(dwarf_cu)->GetLanguageType();
3779         if (best_name.GetDemangledName(cu_language))
3780         {
3781             const char *demangled = best_name.GetDemangledName(cu_language).GetCString();
3782             if (demangled)
3783             {
3784                 std::string name_no_parens(partial_name, base_name_end - partial_name);
3785                 const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3786                 if (partial_in_demangled == NULL)
3787                     return false;
3788                 else
3789                 {
3790                     // Sort out the case where our name is something like "Process::Destroy" and the match is
3791                     // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3792                     // namespace boundaries...
3793
3794                     if (partial_name[0] == ':'  && partial_name[1] == ':')
3795                     {
3796                         // The partial name was already on a namespace boundary so all matches are good.
3797                         return true;
3798                     }
3799                     else if (partial_in_demangled == demangled)
3800                     {
3801                         // They both start the same, so this is an good match.
3802                         return true;
3803                     }
3804                     else
3805                     {
3806                         if (partial_in_demangled - demangled == 1)
3807                         {
3808                             // Only one character difference, can't be a namespace boundary...
3809                             return false;
3810                         }
3811                         else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3812                         {
3813                             // We are on a namespace boundary, so this is also good.
3814                             return true;
3815                         }
3816                         else
3817                             return false;
3818                     }
3819                 }
3820             }
3821         }
3822     }
3823
3824     return true;
3825 }
3826
3827 uint32_t
3828 SymbolFileDWARF::FindFunctions (const ConstString &name,
3829                                 const lldb_private::ClangNamespaceDecl *namespace_decl,
3830                                 uint32_t name_type_mask,
3831                                 bool include_inlines,
3832                                 bool append,
3833                                 SymbolContextList& sc_list)
3834 {
3835     Timer scoped_timer (__PRETTY_FUNCTION__,
3836                         "SymbolFileDWARF::FindFunctions (name = '%s')",
3837                         name.AsCString());
3838
3839     // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3840     assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3841
3842     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3843
3844     if (log)
3845     {
3846         GetObjectFile()->GetModule()->LogMessage (log,
3847                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3848                                                   name.GetCString(),
3849                                                   name_type_mask,
3850                                                   append);
3851     }
3852
3853     // If we aren't appending the results to this list, then clear the list
3854     if (!append)
3855         sc_list.Clear();
3856
3857     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3858         return 0;
3859
3860     // If name is empty then we won't find anything.
3861     if (name.IsEmpty())
3862         return 0;
3863
3864     // Remember how many sc_list are in the list before we search in case
3865     // we are appending the results to a variable list.
3866
3867     const char *name_cstr = name.GetCString();
3868
3869     const uint32_t original_size = sc_list.GetSize();
3870
3871     DWARFDebugInfo* info = DebugInfo();
3872     if (info == NULL)
3873         return 0;
3874
3875     DWARFCompileUnit *dwarf_cu = NULL;
3876     std::set<const DWARFDebugInfoEntry *> resolved_dies;
3877     if (m_using_apple_tables)
3878     {
3879         if (m_apple_names_ap.get())
3880         {
3881
3882             DIEArray die_offsets;
3883
3884             uint32_t num_matches = 0;
3885
3886             if (name_type_mask & eFunctionNameTypeFull)
3887             {
3888                 // If they asked for the full name, match what they typed.  At some point we may
3889                 // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3890                 // dies that we find by exact match.
3891                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3892                 for (uint32_t i = 0; i < num_matches; i++)
3893                 {
3894                     const dw_offset_t die_offset = die_offsets[i];
3895                     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3896                     if (die)
3897                     {
3898                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3899                             continue;
3900
3901                         if (resolved_dies.find(die) == resolved_dies.end())
3902                         {
3903                             if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3904                                 resolved_dies.insert(die);
3905                         }
3906                     }
3907                     else
3908                     {
3909                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3910                                                                                    die_offset, name_cstr);
3911                     }
3912                 }
3913             }
3914
3915             if (name_type_mask & eFunctionNameTypeSelector)
3916             {
3917                 if (namespace_decl && *namespace_decl)
3918                     return 0; // no selectors in namespaces
3919
3920                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3921                 // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3922                 // and if it is an ObjC method name, we're good.
3923
3924                 for (uint32_t i = 0; i < num_matches; i++)
3925                 {
3926                     const dw_offset_t die_offset = die_offsets[i];
3927                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3928                     if (die)
3929                     {
3930                         const char *die_name = die->GetName(this, dwarf_cu);
3931                         if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3932                         {
3933                             if (resolved_dies.find(die) == resolved_dies.end())
3934                             {
3935                                 if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3936                                     resolved_dies.insert(die);
3937                             }
3938                         }
3939                     }
3940                     else
3941                     {
3942                         GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3943                                                                    die_offset, name_cstr);
3944                     }
3945                 }
3946                 die_offsets.clear();
3947             }
3948
3949             if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3950             {
3951                 // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3952                 // extract the base name, look that up, and if there is any other information in the name we were
3953                 // passed in we have to post-filter based on that.
3954
3955                 // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3956                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3957
3958                 for (uint32_t i = 0; i < num_matches; i++)
3959                 {
3960                     const dw_offset_t die_offset = die_offsets[i];
3961                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3962                     if (die)
3963                     {
3964                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3965                             continue;
3966
3967                         // If we get to here, the die is good, and we should add it:
3968                         if (resolved_dies.find(die) == resolved_dies.end())
3969                         if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3970                         {
3971                             bool keep_die = true;
3972                             if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3973                             {
3974                                 // We are looking for either basenames or methods, so we need to
3975                                 // trim out the ones we won't want by looking at the type
3976                                 SymbolContext sc;
3977                                 if (sc_list.GetLastContext(sc))
3978                                 {
3979                                     if (sc.block)
3980                                     {
3981                                         // We have an inlined function
3982                                     }
3983                                     else if (sc.function)
3984                                     {
3985                                         Type *type = sc.function->GetType();
3986
3987                                         if (type)
3988                                         {
3989                                             clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3990                                             if (decl_ctx->isRecord())
3991                                             {
3992                                                 if (name_type_mask & eFunctionNameTypeBase)
3993                                                 {
3994                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3995                                                     keep_die = false;
3996                                                 }
3997                                             }
3998                                             else
3999                                             {
4000                                                 if (name_type_mask & eFunctionNameTypeMethod)
4001                                                 {
4002                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
4003                                                     keep_die = false;
4004                                                 }
4005                                             }
4006                                         }
4007                                         else
4008                                         {
4009                                             GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
4010                                                                                          die_offset);
4011                                         }
4012                                     }
4013                                 }
4014                             }
4015                             if (keep_die)
4016                                 resolved_dies.insert(die);
4017                         }
4018                     }
4019                     else
4020                     {
4021                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
4022                                                                                    die_offset, name_cstr);
4023                     }
4024                 }
4025                 die_offsets.clear();
4026             }
4027         }
4028     }
4029     else
4030     {
4031
4032         // Index the DWARF if we haven't already
4033         if (!m_indexed)
4034             Index ();
4035
4036         if (name_type_mask & eFunctionNameTypeFull)
4037         {
4038             FindFunctions (name, m_function_fullname_index, include_inlines, sc_list);
4039
4040             // FIXME Temporary workaround for global/anonymous namespace
4041             // functions debugging FreeBSD and Linux binaries.
4042             // If we didn't find any functions in the global namespace try
4043             // looking in the basename index but ignore any returned
4044             // functions that have a namespace but keep functions which
4045             // have an anonymous namespace
4046             // TODO: The arch in the object file isn't correct for MSVC
4047             // binaries on windows, we should find a way to make it
4048             // correct and handle those symbols as well.
4049             if (sc_list.GetSize() == 0)
4050             {
4051                 ArchSpec arch;
4052                 if (!namespace_decl &&
4053                     GetObjectFile()->GetArchitecture(arch) &&
4054                     (arch.GetTriple().isOSFreeBSD() || arch.GetTriple().isOSLinux() ||
4055                      arch.GetMachine() == llvm::Triple::hexagon))
4056                 {
4057                     SymbolContextList temp_sc_list;
4058                     FindFunctions (name, m_function_basename_index, include_inlines, temp_sc_list);
4059                     SymbolContext sc;
4060                     for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
4061                     {
4062                         if (temp_sc_list.GetContextAtIndex(i, sc))
4063                         {
4064                             ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
4065                             ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
4066                             // Mangled names on Linux and FreeBSD are of the form:
4067                             // _ZN18function_namespace13function_nameEv.
4068                             if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
4069                                 !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
4070                             {
4071                                 sc_list.Append(sc);
4072                             }
4073                         }
4074                     }
4075                 }
4076             }
4077         }
4078         DIEArray die_offsets;
4079         DWARFCompileUnit *dwarf_cu = NULL;
4080
4081         if (name_type_mask & eFunctionNameTypeBase)
4082         {
4083             uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
4084             for (uint32_t i = 0; i < num_base; i++)
4085             {
4086                 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
4087                 if (die)
4088                 {
4089                     if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4090                         continue;
4091
4092                     // If we get to here, the die is good, and we should add it:
4093                     if (resolved_dies.find(die) == resolved_dies.end())
4094                     {
4095                         if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
4096                             resolved_dies.insert(die);
4097                     }
4098                 }
4099             }
4100             die_offsets.clear();
4101         }
4102
4103         if (name_type_mask & eFunctionNameTypeMethod)
4104         {
4105             if (namespace_decl && *namespace_decl)
4106                 return 0; // no methods in namespaces
4107
4108             uint32_t num_base = m_function_method_index.Find(name, die_offsets);
4109             {
4110                 for (uint32_t i = 0; i < num_base; i++)
4111                 {
4112                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
4113                     if (die)
4114                     {
4115                         // If we get to here, the die is good, and we should add it:
4116                         if (resolved_dies.find(die) == resolved_dies.end())
4117                         {
4118                             if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
4119                                 resolved_dies.insert(die);
4120                         }
4121                     }
4122                 }
4123             }
4124             die_offsets.clear();
4125         }
4126
4127         if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
4128         {
4129             FindFunctions (name, m_function_selector_index, include_inlines, sc_list);
4130         }
4131
4132     }
4133
4134     // Return the number of variable that were appended to the list
4135     const uint32_t num_matches = sc_list.GetSize() - original_size;
4136
4137     if (log && num_matches > 0)
4138     {
4139         GetObjectFile()->GetModule()->LogMessage (log,
4140                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, include_inlines=%d, append=%u, sc_list) => %u",
4141                                                   name.GetCString(),
4142                                                   name_type_mask,
4143                                                   include_inlines,
4144                                                   append,
4145                                                   num_matches);
4146     }
4147     return num_matches;
4148 }
4149
4150 uint32_t
4151 SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
4152 {
4153     Timer scoped_timer (__PRETTY_FUNCTION__,
4154                         "SymbolFileDWARF::FindFunctions (regex = '%s')",
4155                         regex.GetText());
4156
4157     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4158
4159     if (log)
4160     {
4161         GetObjectFile()->GetModule()->LogMessage (log,
4162                                                   "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
4163                                                   regex.GetText(),
4164                                                   append);
4165     }
4166
4167
4168     // If we aren't appending the results to this list, then clear the list
4169     if (!append)
4170         sc_list.Clear();
4171
4172     // Remember how many sc_list are in the list before we search in case
4173     // we are appending the results to a variable list.
4174     uint32_t original_size = sc_list.GetSize();
4175
4176     if (m_using_apple_tables)
4177     {
4178         if (m_apple_names_ap.get())
4179             FindFunctions (regex, *m_apple_names_ap, include_inlines, sc_list);
4180     }
4181     else
4182     {
4183         // Index the DWARF if we haven't already
4184         if (!m_indexed)
4185             Index ();
4186
4187         FindFunctions (regex, m_function_basename_index, include_inlines, sc_list);
4188
4189         FindFunctions (regex, m_function_fullname_index, include_inlines, sc_list);
4190     }
4191
4192     // Return the number of variable that were appended to the list
4193     return sc_list.GetSize() - original_size;
4194 }
4195
4196 uint32_t
4197 SymbolFileDWARF::FindTypes (const SymbolContext& sc,
4198                             const ConstString &name,
4199                             const lldb_private::ClangNamespaceDecl *namespace_decl,
4200                             bool append,
4201                             uint32_t max_matches,
4202                             TypeList& types)
4203 {
4204     DWARFDebugInfo* info = DebugInfo();
4205     if (info == NULL)
4206         return 0;
4207
4208     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4209
4210     if (log)
4211     {
4212         if (namespace_decl)
4213             GetObjectFile()->GetModule()->LogMessage (log,
4214                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
4215                                                       name.GetCString(),
4216                                                       static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4217                                                       namespace_decl->GetQualifiedName().c_str(),
4218                                                       append, max_matches);
4219         else
4220             GetObjectFile()->GetModule()->LogMessage (log,
4221                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
4222                                                       name.GetCString(), append,
4223                                                       max_matches);
4224     }
4225
4226     // If we aren't appending the results to this list, then clear the list
4227     if (!append)
4228         types.Clear();
4229
4230     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
4231         return 0;
4232
4233     DIEArray die_offsets;
4234
4235     if (m_using_apple_tables)
4236     {
4237         if (m_apple_types_ap.get())
4238         {
4239             const char *name_cstr = name.GetCString();
4240             m_apple_types_ap->FindByName (name_cstr, die_offsets);
4241         }
4242     }
4243     else
4244     {
4245         if (!m_indexed)
4246             Index ();
4247
4248         m_type_index.Find (name, die_offsets);
4249     }
4250
4251     const size_t num_die_matches = die_offsets.size();
4252
4253     if (num_die_matches)
4254     {
4255         const uint32_t initial_types_size = types.GetSize();
4256         DWARFCompileUnit* dwarf_cu = NULL;
4257         const DWARFDebugInfoEntry* die = NULL;
4258         DWARFDebugInfo* debug_info = DebugInfo();
4259         for (size_t i=0; i<num_die_matches; ++i)
4260         {
4261             const dw_offset_t die_offset = die_offsets[i];
4262             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4263
4264             if (die)
4265             {
4266                 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4267                     continue;
4268
4269                 Type *matching_type = ResolveType (dwarf_cu, die);
4270                 if (matching_type)
4271                 {
4272                     // We found a type pointer, now find the shared pointer form our type list
4273                     types.InsertUnique (matching_type->shared_from_this());
4274                     if (types.GetSize() >= max_matches)
4275                         break;
4276                 }
4277             }
4278             else
4279             {
4280                 if (m_using_apple_tables)
4281                 {
4282                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4283                                                                                die_offset, name.GetCString());
4284                 }
4285             }
4286
4287         }
4288         const uint32_t num_matches = types.GetSize() - initial_types_size;
4289         if (log && num_matches)
4290         {
4291             if (namespace_decl)
4292             {
4293                 GetObjectFile()->GetModule()->LogMessage (log,
4294                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4295                                                           name.GetCString(),
4296                                                           static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4297                                                           namespace_decl->GetQualifiedName().c_str(),
4298                                                           append, max_matches,
4299                                                           num_matches);
4300             }
4301             else
4302             {
4303                 GetObjectFile()->GetModule()->LogMessage (log,
4304                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4305                                                           name.GetCString(),
4306                                                           append, max_matches,
4307                                                           num_matches);
4308             }
4309         }
4310         return num_matches;
4311     }
4312     return 0;
4313 }
4314
4315
4316 ClangNamespaceDecl
4317 SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4318                                 const ConstString &name,
4319                                 const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4320 {
4321     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4322
4323     if (log)
4324     {
4325         GetObjectFile()->GetModule()->LogMessage (log,
4326                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4327                                                   name.GetCString());
4328     }
4329
4330     if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4331         return ClangNamespaceDecl();
4332
4333     ClangNamespaceDecl namespace_decl;
4334     DWARFDebugInfo* info = DebugInfo();
4335     if (info)
4336     {
4337         DIEArray die_offsets;
4338
4339         // Index if we already haven't to make sure the compile units
4340         // get indexed and make their global DIE index list
4341         if (m_using_apple_tables)
4342         {
4343             if (m_apple_namespaces_ap.get())
4344             {
4345                 const char *name_cstr = name.GetCString();
4346                 m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4347             }
4348         }
4349         else
4350         {
4351             if (!m_indexed)
4352                 Index ();
4353
4354             m_namespace_index.Find (name, die_offsets);
4355         }
4356
4357         DWARFCompileUnit* dwarf_cu = NULL;
4358         const DWARFDebugInfoEntry* die = NULL;
4359         const size_t num_matches = die_offsets.size();
4360         if (num_matches)
4361         {
4362             DWARFDebugInfo* debug_info = DebugInfo();
4363             for (size_t i=0; i<num_matches; ++i)
4364             {
4365                 const dw_offset_t die_offset = die_offsets[i];
4366                 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4367
4368                 if (die)
4369                 {
4370                     if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4371                         continue;
4372
4373                     clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4374                     if (clang_namespace_decl)
4375                     {
4376                         namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4377                         namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4378                         break;
4379                     }
4380                 }
4381                 else
4382                 {
4383                     if (m_using_apple_tables)
4384                     {
4385                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4386                                                                    die_offset, name.GetCString());
4387                     }
4388                 }
4389
4390             }
4391         }
4392     }
4393     if (log && namespace_decl.GetNamespaceDecl())
4394     {
4395         GetObjectFile()->GetModule()->LogMessage (log,
4396                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4397                                                   name.GetCString(),
4398                                                   static_cast<const void*>(namespace_decl.GetNamespaceDecl()),
4399                                                   namespace_decl.GetQualifiedName().c_str());
4400     }
4401
4402     return namespace_decl;
4403 }
4404
4405 uint32_t
4406 SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4407 {
4408     // Remember how many sc_list are in the list before we search in case
4409     // we are appending the results to a variable list.
4410     uint32_t original_size = types.GetSize();
4411
4412     const uint32_t num_die_offsets = die_offsets.size();
4413     // Parse all of the types we found from the pubtypes matches
4414     uint32_t i;
4415     uint32_t num_matches = 0;
4416     for (i = 0; i < num_die_offsets; ++i)
4417     {
4418         Type *matching_type = ResolveTypeUID (die_offsets[i]);
4419         if (matching_type)
4420         {
4421             // We found a type pointer, now find the shared pointer form our type list
4422             types.InsertUnique (matching_type->shared_from_this());
4423             ++num_matches;
4424             if (num_matches >= max_matches)
4425                 break;
4426         }
4427     }
4428
4429     // Return the number of variable that were appended to the list
4430     return types.GetSize() - original_size;
4431 }
4432
4433
4434 size_t
4435 SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4436                                        clang::DeclContext *containing_decl_ctx,
4437                                        DWARFCompileUnit* dwarf_cu,
4438                                        const DWARFDebugInfoEntry *parent_die,
4439                                        bool skip_artificial,
4440                                        bool &is_static,
4441                                        bool &is_variadic,
4442                                        std::vector<ClangASTType>& function_param_types,
4443                                        std::vector<clang::ParmVarDecl*>& function_param_decls,
4444                                        unsigned &type_quals) // ,
4445                                        // ClangASTContext::TemplateParameterInfos &template_param_infos))
4446 {
4447     if (parent_die == NULL)
4448         return 0;
4449
4450     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4451
4452     size_t arg_idx = 0;
4453     const DWARFDebugInfoEntry *die;
4454     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4455     {
4456         dw_tag_t tag = die->Tag();
4457         switch (tag)
4458         {
4459         case DW_TAG_formal_parameter:
4460             {
4461                 DWARFDebugInfoEntry::Attributes attributes;
4462                 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4463                 if (num_attributes > 0)
4464                 {
4465                     const char *name = NULL;
4466                     Declaration decl;
4467                     dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4468                     bool is_artificial = false;
4469                     // one of None, Auto, Register, Extern, Static, PrivateExtern
4470
4471                     clang::StorageClass storage = clang::SC_None;
4472                     uint32_t i;
4473                     for (i=0; i<num_attributes; ++i)
4474                     {
4475                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4476                         DWARFFormValue form_value;
4477                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4478                         {
4479                             switch (attr)
4480                             {
4481                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4482                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4483                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4484                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
4485                             case DW_AT_type:        param_type_die_offset = form_value.Reference(); break;
4486                             case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
4487                             case DW_AT_location:
4488     //                          if (form_value.BlockData())
4489     //                          {
4490     //                              const DWARFDataExtractor& debug_info_data = debug_info();
4491     //                              uint32_t block_length = form_value.Unsigned();
4492     //                              DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4493     //                          }
4494     //                          else
4495     //                          {
4496     //                          }
4497     //                          break;
4498                             case DW_AT_const_value:
4499                             case DW_AT_default_value:
4500                             case DW_AT_description:
4501                             case DW_AT_endianity:
4502                             case DW_AT_is_optional:
4503                             case DW_AT_segment:
4504                             case DW_AT_variable_parameter:
4505                             default:
4506                             case DW_AT_abstract_origin:
4507                             case DW_AT_sibling:
4508                                 break;
4509                             }
4510                         }
4511                     }
4512
4513                     bool skip = false;
4514                     if (skip_artificial)
4515                     {
4516                         if (is_artificial)
4517                         {
4518                             // In order to determine if a C++ member function is
4519                             // "const" we have to look at the const-ness of "this"...
4520                             // Ugly, but that
4521                             if (arg_idx == 0)
4522                             {
4523                                 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4524                                 {
4525                                     // Often times compilers omit the "this" name for the
4526                                     // specification DIEs, so we can't rely upon the name
4527                                     // being in the formal parameter DIE...
4528                                     if (name == NULL || ::strcmp(name, "this")==0)
4529                                     {
4530                                         Type *this_type = ResolveTypeUID (param_type_die_offset);
4531                                         if (this_type)
4532                                         {
4533                                             uint32_t encoding_mask = this_type->GetEncodingMask();
4534                                             if (encoding_mask & Type::eEncodingIsPointerUID)
4535                                             {
4536                                                 is_static = false;
4537
4538                                                 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4539                                                     type_quals |= clang::Qualifiers::Const;
4540                                                 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4541                                                     type_quals |= clang::Qualifiers::Volatile;
4542                                             }
4543                                         }
4544                                     }
4545                                 }
4546                             }
4547                             skip = true;
4548                         }
4549                         else
4550                         {
4551
4552                             // HACK: Objective C formal parameters "self" and "_cmd"
4553                             // are not marked as artificial in the DWARF...
4554                             CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4555                             if (comp_unit)
4556                             {
4557                                 switch (comp_unit->GetLanguage())
4558                                 {
4559                                     case eLanguageTypeObjC:
4560                                     case eLanguageTypeObjC_plus_plus:
4561                                         if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4562                                             skip = true;
4563                                         break;
4564                                     default:
4565                                         break;
4566                                 }
4567                             }
4568                         }
4569                     }
4570
4571                     if (!skip)
4572                     {
4573                         Type *type = ResolveTypeUID(param_type_die_offset);
4574                         if (type)
4575                         {
4576                             function_param_types.push_back (type->GetClangForwardType());
4577
4578                             clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4579                                                                                                                   type->GetClangForwardType(),
4580                                                                                                                   storage);
4581                             assert(param_var_decl);
4582                             function_param_decls.push_back(param_var_decl);
4583
4584                             GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4585                         }
4586                     }
4587                 }
4588                 arg_idx++;
4589             }
4590             break;
4591
4592         case DW_TAG_unspecified_parameters:
4593             is_variadic = true;
4594             break;
4595
4596         case DW_TAG_template_type_parameter:
4597         case DW_TAG_template_value_parameter:
4598             // The one caller of this was never using the template_param_infos,
4599             // and the local variable was taking up a large amount of stack space
4600             // in SymbolFileDWARF::ParseType() so this was removed. If we ever need
4601             // the template params back, we can add them back.
4602             // ParseTemplateDIE (dwarf_cu, die, template_param_infos);
4603             break;
4604
4605         default:
4606             break;
4607         }
4608     }
4609     return arg_idx;
4610 }
4611
4612 size_t
4613 SymbolFileDWARF::ParseChildEnumerators
4614 (
4615     const SymbolContext& sc,
4616     lldb_private::ClangASTType &clang_type,
4617     bool is_signed,
4618     uint32_t enumerator_byte_size,
4619     DWARFCompileUnit* dwarf_cu,
4620     const DWARFDebugInfoEntry *parent_die
4621 )
4622 {
4623     if (parent_die == NULL)
4624         return 0;
4625
4626     size_t enumerators_added = 0;
4627     const DWARFDebugInfoEntry *die;
4628     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4629
4630     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4631     {
4632         const dw_tag_t tag = die->Tag();
4633         if (tag == DW_TAG_enumerator)
4634         {
4635             DWARFDebugInfoEntry::Attributes attributes;
4636             const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4637             if (num_child_attributes > 0)
4638             {
4639                 const char *name = NULL;
4640                 bool got_value = false;
4641                 int64_t enum_value = 0;
4642                 Declaration decl;
4643
4644                 uint32_t i;
4645                 for (i=0; i<num_child_attributes; ++i)
4646                 {
4647                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
4648                     DWARFFormValue form_value;
4649                     if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4650                     {
4651                         switch (attr)
4652                         {
4653                         case DW_AT_const_value:
4654                             got_value = true;
4655                             if (is_signed)
4656                                 enum_value = form_value.Signed();
4657                             else
4658                                 enum_value = form_value.Unsigned();
4659                             break;
4660
4661                         case DW_AT_name:
4662                             name = form_value.AsCString(&get_debug_str_data());
4663                             break;
4664
4665                         case DW_AT_description:
4666                         default:
4667                         case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4668                         case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4669                         case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4670                         case DW_AT_sibling:
4671                             break;
4672                         }
4673                     }
4674                 }
4675
4676                 if (name && name[0] && got_value)
4677                 {
4678                     clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4679                                                                      decl,
4680                                                                      name,
4681                                                                      enum_value,
4682                                                                      enumerator_byte_size * 8);
4683                     ++enumerators_added;
4684                 }
4685             }
4686         }
4687     }
4688     return enumerators_added;
4689 }
4690
4691 void
4692 SymbolFileDWARF::ParseChildArrayInfo
4693 (
4694     const SymbolContext& sc,
4695     DWARFCompileUnit* dwarf_cu,
4696     const DWARFDebugInfoEntry *parent_die,
4697     int64_t& first_index,
4698     std::vector<uint64_t>& element_orders,
4699     uint32_t& byte_stride,
4700     uint32_t& bit_stride
4701 )
4702 {
4703     if (parent_die == NULL)
4704         return;
4705
4706     const DWARFDebugInfoEntry *die;
4707     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4708     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4709     {
4710         const dw_tag_t tag = die->Tag();
4711         switch (tag)
4712         {
4713         case DW_TAG_subrange_type:
4714             {
4715                 DWARFDebugInfoEntry::Attributes attributes;
4716                 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4717                 if (num_child_attributes > 0)
4718                 {
4719                     uint64_t num_elements = 0;
4720                     uint64_t lower_bound = 0;
4721                     uint64_t upper_bound = 0;
4722                     bool upper_bound_valid = false;
4723                     uint32_t i;
4724                     for (i=0; i<num_child_attributes; ++i)
4725                     {
4726                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4727                         DWARFFormValue form_value;
4728                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4729                         {
4730                             switch (attr)
4731                             {
4732                             case DW_AT_name:
4733                                 break;
4734
4735                             case DW_AT_count:
4736                                 num_elements = form_value.Unsigned();
4737                                 break;
4738
4739                             case DW_AT_bit_stride:
4740                                 bit_stride = form_value.Unsigned();
4741                                 break;
4742
4743                             case DW_AT_byte_stride:
4744                                 byte_stride = form_value.Unsigned();
4745                                 break;
4746
4747                             case DW_AT_lower_bound:
4748                                 lower_bound = form_value.Unsigned();
4749                                 break;
4750
4751                             case DW_AT_upper_bound:
4752                                 upper_bound_valid = true;
4753                                 upper_bound = form_value.Unsigned();
4754                                 break;
4755
4756                             default:
4757                             case DW_AT_abstract_origin:
4758                             case DW_AT_accessibility:
4759                             case DW_AT_allocated:
4760                             case DW_AT_associated:
4761                             case DW_AT_data_location:
4762                             case DW_AT_declaration:
4763                             case DW_AT_description:
4764                             case DW_AT_sibling:
4765                             case DW_AT_threads_scaled:
4766                             case DW_AT_type:
4767                             case DW_AT_visibility:
4768                                 break;
4769                             }
4770                         }
4771                     }
4772
4773                     if (num_elements == 0)
4774                     {
4775                         if (upper_bound_valid && upper_bound >= lower_bound)
4776                             num_elements = upper_bound - lower_bound + 1;
4777                     }
4778
4779                     element_orders.push_back (num_elements);
4780                 }
4781             }
4782             break;
4783         }
4784     }
4785 }
4786
4787 TypeSP
4788 SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4789 {
4790     TypeSP type_sp;
4791     if (die != NULL)
4792     {
4793         assert(dwarf_cu != NULL);
4794         Type *type_ptr = m_die_to_type.lookup (die);
4795         if (type_ptr == NULL)
4796         {
4797             CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4798             assert (lldb_cu);
4799             SymbolContext sc(lldb_cu);
4800             type_sp = ParseType(sc, dwarf_cu, die, NULL);
4801         }
4802         else if (type_ptr != DIE_IS_BEING_PARSED)
4803         {
4804             // Grab the existing type from the master types lists
4805             type_sp = type_ptr->shared_from_this();
4806         }
4807
4808     }
4809     return type_sp;
4810 }
4811
4812 clang::DeclContext *
4813 SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4814 {
4815     if (die_offset != DW_INVALID_OFFSET)
4816     {
4817         DWARFCompileUnitSP cu_sp;
4818         const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4819         return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4820     }
4821     return NULL;
4822 }
4823
4824 clang::DeclContext *
4825 SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4826 {
4827     if (die_offset != DW_INVALID_OFFSET)
4828     {
4829         DWARFDebugInfo* debug_info = DebugInfo();
4830         if (debug_info)
4831         {
4832             DWARFCompileUnitSP cu_sp;
4833             const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4834             if (die)
4835                 return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4836         }
4837     }
4838     return NULL;
4839 }
4840
4841 clang::NamespaceDecl *
4842 SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4843 {
4844     if (die && die->Tag() == DW_TAG_namespace)
4845     {
4846         // See if we already parsed this namespace DIE and associated it with a
4847         // uniqued namespace declaration
4848         clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4849         if (namespace_decl)
4850             return namespace_decl;
4851         else
4852         {
4853             const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4854             clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4855             namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4856             Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4857             if (log)
4858             {
4859                 if (namespace_name)
4860                 {
4861                     GetObjectFile()->GetModule()->LogMessage (log,
4862                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4863                                                               static_cast<void*>(GetClangASTContext().getASTContext()),
4864                                                               MakeUserID(die->GetOffset()),
4865                                                               namespace_name,
4866                                                               static_cast<void*>(namespace_decl),
4867                                                               static_cast<void*>(namespace_decl->getOriginalNamespace()));
4868                 }
4869                 else
4870                 {
4871                     GetObjectFile()->GetModule()->LogMessage (log,
4872                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4873                                                               static_cast<void*>(GetClangASTContext().getASTContext()),
4874                                                               MakeUserID(die->GetOffset()),
4875                                                               static_cast<void*>(namespace_decl),
4876                                                               static_cast<void*>(namespace_decl->getOriginalNamespace()));
4877                 }
4878             }
4879
4880             if (namespace_decl)
4881                 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4882             return namespace_decl;
4883         }
4884     }
4885     return NULL;
4886 }
4887
4888 clang::DeclContext *
4889 SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4890 {
4891     clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4892     if (clang_decl_ctx)
4893         return clang_decl_ctx;
4894     // If this DIE has a specification, or an abstract origin, then trace to those.
4895
4896     dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4897     if (die_offset != DW_INVALID_OFFSET)
4898         return GetClangDeclContextForDIEOffset (sc, die_offset);
4899
4900     die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4901     if (die_offset != DW_INVALID_OFFSET)
4902         return GetClangDeclContextForDIEOffset (sc, die_offset);
4903
4904     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4905     if (log)
4906         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));
4907     // This is the DIE we want.  Parse it, then query our map.
4908     bool assert_not_being_parsed = true;
4909     ResolveTypeUID (cu, die, assert_not_being_parsed);
4910
4911     clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4912
4913     return clang_decl_ctx;
4914 }
4915
4916 clang::DeclContext *
4917 SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4918 {
4919     if (m_clang_tu_decl == NULL)
4920         m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4921
4922     const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4923
4924     if (decl_ctx_die_copy)
4925         *decl_ctx_die_copy = decl_ctx_die;
4926
4927     if (decl_ctx_die)
4928     {
4929
4930         DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4931         if (pos != m_die_to_decl_ctx.end())
4932             return pos->second;
4933
4934         switch (decl_ctx_die->Tag())
4935         {
4936         case DW_TAG_compile_unit:
4937             return m_clang_tu_decl;
4938
4939         case DW_TAG_namespace:
4940             return ResolveNamespaceDIE (cu, decl_ctx_die);
4941             break;
4942
4943         case DW_TAG_structure_type:
4944         case DW_TAG_union_type:
4945         case DW_TAG_class_type:
4946             {
4947                 Type* type = ResolveType (cu, decl_ctx_die);
4948                 if (type)
4949                 {
4950                     clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4951                     if (decl_ctx)
4952                     {
4953                         LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4954                         if (decl_ctx)
4955                             return decl_ctx;
4956                     }
4957                 }
4958             }
4959             break;
4960
4961         default:
4962             break;
4963         }
4964     }
4965     return m_clang_tu_decl;
4966 }
4967
4968
4969 const DWARFDebugInfoEntry *
4970 SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4971 {
4972     if (cu && die)
4973     {
4974         const DWARFDebugInfoEntry * const decl_die = die;
4975
4976         while (die != NULL)
4977         {
4978             // If this is the original DIE that we are searching for a declaration
4979             // for, then don't look in the cache as we don't want our own decl
4980             // context to be our decl context...
4981             if (decl_die != die)
4982             {
4983                 switch (die->Tag())
4984                 {
4985                     case DW_TAG_compile_unit:
4986                     case DW_TAG_namespace:
4987                     case DW_TAG_structure_type:
4988                     case DW_TAG_union_type:
4989                     case DW_TAG_class_type:
4990                         return die;
4991
4992                     default:
4993                         break;
4994                 }
4995             }
4996
4997             dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4998             if (die_offset != DW_INVALID_OFFSET)
4999             {
5000                 DWARFCompileUnit *spec_cu = cu;
5001                 const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
5002                 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
5003                 if (spec_die_decl_ctx_die)
5004                     return spec_die_decl_ctx_die;
5005             }
5006
5007             die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
5008             if (die_offset != DW_INVALID_OFFSET)
5009             {
5010                 DWARFCompileUnit *abs_cu = cu;
5011                 const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
5012                 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
5013                 if (abs_die_decl_ctx_die)
5014                     return abs_die_decl_ctx_die;
5015             }
5016
5017             die = die->GetParent();
5018         }
5019     }
5020     return NULL;
5021 }
5022
5023
5024 Symbol *
5025 SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
5026 {
5027     Symbol *objc_class_symbol = NULL;
5028     if (m_obj_file)
5029     {
5030         Symtab *symtab = m_obj_file->GetSymtab ();
5031         if (symtab)
5032         {
5033             objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
5034                                                                         eSymbolTypeObjCClass,
5035                                                                         Symtab::eDebugNo,
5036                                                                         Symtab::eVisibilityAny);
5037         }
5038     }
5039     return objc_class_symbol;
5040 }
5041
5042 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
5043 // then we can end up looking through all class types for a complete type and never find
5044 // the full definition. We need to know if this attribute is supported, so we determine
5045 // this here and cache th result. We also need to worry about the debug map DWARF file
5046 // if we are doing darwin DWARF in .o file debugging.
5047 bool
5048 SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
5049 {
5050     if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
5051     {
5052         m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
5053         if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
5054             m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
5055         else
5056         {
5057             DWARFDebugInfo* debug_info = DebugInfo();
5058             const uint32_t num_compile_units = GetNumCompileUnits();
5059             for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
5060             {
5061                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
5062                 if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
5063                 {
5064                     m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
5065                     break;
5066                 }
5067             }
5068         }
5069         if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
5070             return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
5071     }
5072     return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
5073 }
5074
5075 // This function can be used when a DIE is found that is a forward declaration
5076 // DIE and we want to try and find a type that has the complete definition.
5077 TypeSP
5078 SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
5079                                                        const ConstString &type_name,
5080                                                        bool must_be_implementation)
5081 {
5082
5083     TypeSP type_sp;
5084
5085     if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
5086         return type_sp;
5087
5088     DIEArray die_offsets;
5089
5090     if (m_using_apple_tables)
5091     {
5092         if (m_apple_types_ap.get())
5093         {
5094             const char *name_cstr = type_name.GetCString();
5095             m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
5096         }
5097     }
5098     else
5099     {
5100         if (!m_indexed)
5101             Index ();
5102
5103         m_type_index.Find (type_name, die_offsets);
5104     }
5105
5106     const size_t num_matches = die_offsets.size();
5107
5108     DWARFCompileUnit* type_cu = NULL;
5109     const DWARFDebugInfoEntry* type_die = NULL;
5110     if (num_matches)
5111     {
5112         DWARFDebugInfo* debug_info = DebugInfo();
5113         for (size_t i=0; i<num_matches; ++i)
5114         {
5115             const dw_offset_t die_offset = die_offsets[i];
5116             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5117
5118             if (type_die)
5119             {
5120                 bool try_resolving_type = false;
5121
5122                 // Don't try and resolve the DIE we are looking for with the DIE itself!
5123                 if (type_die != die)
5124                 {
5125                     switch (type_die->Tag())
5126                     {
5127                         case DW_TAG_class_type:
5128                         case DW_TAG_structure_type:
5129                             try_resolving_type = true;
5130                             break;
5131                         default:
5132                             break;
5133                     }
5134                 }
5135
5136                 if (try_resolving_type)
5137                 {
5138                     if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
5139                         try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
5140
5141                     if (try_resolving_type)
5142                     {
5143                         Type *resolved_type = ResolveType (type_cu, type_die, false);
5144                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5145                         {
5146                             DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
5147                                           MakeUserID(die->GetOffset()),
5148                                           m_obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"),
5149                                           MakeUserID(type_die->GetOffset()),
5150                                           MakeUserID(type_cu->GetOffset()));
5151
5152                             if (die)
5153                                 m_die_to_type[die] = resolved_type;
5154                             type_sp = resolved_type->shared_from_this();
5155                             break;
5156                         }
5157                     }
5158                 }
5159             }
5160             else
5161             {
5162                 if (m_using_apple_tables)
5163                 {
5164                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5165                                                                die_offset, type_name.GetCString());
5166                 }
5167             }
5168
5169         }
5170     }
5171     return type_sp;
5172 }
5173
5174
5175 //----------------------------------------------------------------------
5176 // This function helps to ensure that the declaration contexts match for
5177 // two different DIEs. Often times debug information will refer to a
5178 // forward declaration of a type (the equivalent of "struct my_struct;".
5179 // There will often be a declaration of that type elsewhere that has the
5180 // full definition. When we go looking for the full type "my_struct", we
5181 // will find one or more matches in the accelerator tables and we will
5182 // then need to make sure the type was in the same declaration context
5183 // as the original DIE. This function can efficiently compare two DIEs
5184 // and will return true when the declaration context matches, and false
5185 // when they don't.
5186 //----------------------------------------------------------------------
5187 bool
5188 SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
5189                                        DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
5190 {
5191     if (die1 == die2)
5192         return true;
5193
5194 #if defined (LLDB_CONFIGURATION_DEBUG)
5195     // You can't and shouldn't call this function with a compile unit from
5196     // two different SymbolFileDWARF instances.
5197     assert (DebugInfo()->ContainsCompileUnit (cu1));
5198     assert (DebugInfo()->ContainsCompileUnit (cu2));
5199 #endif
5200
5201     DWARFDIECollection decl_ctx_1;
5202     DWARFDIECollection decl_ctx_2;
5203     //The declaration DIE stack is a stack of the declaration context
5204     // DIEs all the way back to the compile unit. If a type "T" is
5205     // declared inside a class "B", and class "B" is declared inside
5206     // a class "A" and class "A" is in a namespace "lldb", and the
5207     // namespace is in a compile unit, there will be a stack of DIEs:
5208     //
5209     //   [0] DW_TAG_class_type for "B"
5210     //   [1] DW_TAG_class_type for "A"
5211     //   [2] DW_TAG_namespace  for "lldb"
5212     //   [3] DW_TAG_compile_unit for the source file.
5213     //
5214     // We grab both contexts and make sure that everything matches
5215     // all the way back to the compiler unit.
5216
5217     // First lets grab the decl contexts for both DIEs
5218     die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
5219     die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
5220     // Make sure the context arrays have the same size, otherwise
5221     // we are done
5222     const size_t count1 = decl_ctx_1.Size();
5223     const size_t count2 = decl_ctx_2.Size();
5224     if (count1 != count2)
5225         return false;
5226
5227     // Make sure the DW_TAG values match all the way back up the
5228     // compile unit. If they don't, then we are done.
5229     const DWARFDebugInfoEntry *decl_ctx_die1;
5230     const DWARFDebugInfoEntry *decl_ctx_die2;
5231     size_t i;
5232     for (i=0; i<count1; i++)
5233     {
5234         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5235         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5236         if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
5237             return false;
5238     }
5239 #if defined LLDB_CONFIGURATION_DEBUG
5240
5241     // Make sure the top item in the decl context die array is always
5242     // DW_TAG_compile_unit. If it isn't then something went wrong in
5243     // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
5244     assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
5245
5246 #endif
5247     // Always skip the compile unit when comparing by only iterating up to
5248     // "count - 1". Here we compare the names as we go.
5249     for (i=0; i<count1 - 1; i++)
5250     {
5251         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5252         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5253         const char *name1 = decl_ctx_die1->GetName(this, cu1);
5254         const char *name2 = decl_ctx_die2->GetName(this, cu2);
5255         // If the string was from a DW_FORM_strp, then the pointer will often
5256         // be the same!
5257         if (name1 == name2)
5258             continue;
5259
5260         // Name pointers are not equal, so only compare the strings
5261         // if both are not NULL.
5262         if (name1 && name2)
5263         {
5264             // If the strings don't compare, we are done...
5265             if (strcmp(name1, name2) != 0)
5266                 return false;
5267         }
5268         else
5269         {
5270             // One name was NULL while the other wasn't
5271             return false;
5272         }
5273     }
5274     // We made it through all of the checks and the declaration contexts
5275     // are equal.
5276     return true;
5277 }
5278
5279
5280 TypeSP
5281 SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5282 {
5283     TypeSP type_sp;
5284
5285     const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5286     if (dwarf_decl_ctx_count > 0)
5287     {
5288         const ConstString type_name(dwarf_decl_ctx[0].name);
5289         const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5290
5291         if (type_name)
5292         {
5293             Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5294             if (log)
5295             {
5296                 GetObjectFile()->GetModule()->LogMessage (log,
5297                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5298                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5299                                                           dwarf_decl_ctx.GetQualifiedName());
5300             }
5301
5302             DIEArray die_offsets;
5303
5304             if (m_using_apple_tables)
5305             {
5306                 if (m_apple_types_ap.get())
5307                 {
5308                     const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5309                     const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5310                     if (has_tag && has_qualified_name_hash)
5311                     {
5312                         const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5313                         const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5314                         if (log)
5315                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5316                         m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5317                     }
5318                     else if (has_tag)
5319                     {
5320                         if (log)
5321                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5322                         m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5323                     }
5324                     else
5325                     {
5326                         m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5327                     }
5328                 }
5329             }
5330             else
5331             {
5332                 if (!m_indexed)
5333                     Index ();
5334
5335                 m_type_index.Find (type_name, die_offsets);
5336             }
5337
5338             const size_t num_matches = die_offsets.size();
5339
5340
5341             DWARFCompileUnit* type_cu = NULL;
5342             const DWARFDebugInfoEntry* type_die = NULL;
5343             if (num_matches)
5344             {
5345                 DWARFDebugInfo* debug_info = DebugInfo();
5346                 for (size_t i=0; i<num_matches; ++i)
5347                 {
5348                     const dw_offset_t die_offset = die_offsets[i];
5349                     type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5350
5351                     if (type_die)
5352                     {
5353                         bool try_resolving_type = false;
5354
5355                         // Don't try and resolve the DIE we are looking for with the DIE itself!
5356                         const dw_tag_t type_tag = type_die->Tag();
5357                         // Make sure the tags match
5358                         if (type_tag == tag)
5359                         {
5360                             // The tags match, lets try resolving this type
5361                             try_resolving_type = true;
5362                         }
5363                         else
5364                         {
5365                             // The tags don't match, but we need to watch our for a
5366                             // forward declaration for a struct and ("struct foo")
5367                             // ends up being a class ("class foo { ... };") or
5368                             // vice versa.
5369                             switch (type_tag)
5370                             {
5371                                 case DW_TAG_class_type:
5372                                     // We had a "class foo", see if we ended up with a "struct foo { ... };"
5373                                     try_resolving_type = (tag == DW_TAG_structure_type);
5374                                     break;
5375                                 case DW_TAG_structure_type:
5376                                     // We had a "struct foo", see if we ended up with a "class foo { ... };"
5377                                     try_resolving_type = (tag == DW_TAG_class_type);
5378                                     break;
5379                                 default:
5380                                     // Tags don't match, don't event try to resolve
5381                                     // using this type whose name matches....
5382                                     break;
5383                             }
5384                         }
5385
5386                         if (try_resolving_type)
5387                         {
5388                             DWARFDeclContext type_dwarf_decl_ctx;
5389                             type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5390
5391                             if (log)
5392                             {
5393                                 GetObjectFile()->GetModule()->LogMessage (log,
5394                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5395                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5396                                                                           dwarf_decl_ctx.GetQualifiedName(),
5397                                                                           type_die->GetOffset(),
5398                                                                           type_dwarf_decl_ctx.GetQualifiedName());
5399                             }
5400
5401                             // Make sure the decl contexts match all the way up
5402                             if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5403                             {
5404                                 Type *resolved_type = ResolveType (type_cu, type_die, false);
5405                                 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5406                                 {
5407                                     type_sp = resolved_type->shared_from_this();
5408                                     break;
5409                                 }
5410                             }
5411                         }
5412                         else
5413                         {
5414                             if (log)
5415                             {
5416                                 std::string qualified_name;
5417                                 type_die->GetQualifiedName(this, type_cu, qualified_name);
5418                                 GetObjectFile()->GetModule()->LogMessage (log,
5419                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5420                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5421                                                                           dwarf_decl_ctx.GetQualifiedName(),
5422                                                                           type_die->GetOffset(),
5423                                                                           qualified_name.c_str());
5424                             }
5425                         }
5426                     }
5427                     else
5428                     {
5429                         if (m_using_apple_tables)
5430                         {
5431                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5432                                                                                        die_offset, type_name.GetCString());
5433                         }
5434                     }
5435
5436                 }
5437             }
5438         }
5439     }
5440     return type_sp;
5441 }
5442
5443 bool
5444 SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5445                                              Type *class_type,
5446                                              DWARFCompileUnit* src_cu,
5447                                              const DWARFDebugInfoEntry *src_class_die,
5448                                              DWARFCompileUnit* dst_cu,
5449                                              const DWARFDebugInfoEntry *dst_class_die,
5450                                              DWARFDIECollection &failures)
5451 {
5452     if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5453         return false;
5454     if (src_class_die->Tag() != dst_class_die->Tag())
5455         return false;
5456
5457     // We need to complete the class type so we can get all of the method types
5458     // parsed so we can then unique those types to their equivalent counterparts
5459     // in "dst_cu" and "dst_class_die"
5460     class_type->GetClangFullType();
5461
5462     const DWARFDebugInfoEntry *src_die;
5463     const DWARFDebugInfoEntry *dst_die;
5464     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5465     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5466     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5467     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5468     for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5469     {
5470         if (src_die->Tag() == DW_TAG_subprogram)
5471         {
5472             // Make sure this is a declaration and not a concrete instance by looking
5473             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5474             // are placed inside the class definitions and shouldn't be included in
5475             // the list of things are are tracking here.
5476             if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5477             {
5478                 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5479                 if (src_name)
5480                 {
5481                     ConstString src_const_name(src_name);
5482                     if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5483                         src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5484                     else
5485                         src_name_to_die.Append(src_const_name.GetCString(), src_die);
5486                 }
5487             }
5488         }
5489     }
5490     for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5491     {
5492         if (dst_die->Tag() == DW_TAG_subprogram)
5493         {
5494             // Make sure this is a declaration and not a concrete instance by looking
5495             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5496             // are placed inside the class definitions and shouldn't be included in
5497             // the list of things are are tracking here.
5498             if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5499             {
5500                 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5501                 if (dst_name)
5502                 {
5503                     ConstString dst_const_name(dst_name);
5504                     if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5505                         dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5506                     else
5507                         dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5508                 }
5509             }
5510         }
5511     }
5512     const uint32_t src_size = src_name_to_die.GetSize ();
5513     const uint32_t dst_size = dst_name_to_die.GetSize ();
5514     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5515
5516     // Is everything kosher so we can go through the members at top speed?
5517     bool fast_path = true;
5518
5519     if (src_size != dst_size)
5520     {
5521         if (src_size != 0 && dst_size != 0)
5522         {
5523             if (log)
5524                 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)",
5525                             src_class_die->GetOffset(),
5526                             dst_class_die->GetOffset(),
5527                             src_size,
5528                             dst_size);
5529         }
5530
5531         fast_path = false;
5532     }
5533
5534     uint32_t idx;
5535
5536     if (fast_path)
5537     {
5538         for (idx = 0; idx < src_size; ++idx)
5539         {
5540             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5541             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5542
5543             if (src_die->Tag() != dst_die->Tag())
5544             {
5545                 if (log)
5546                     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)",
5547                                 src_class_die->GetOffset(),
5548                                 dst_class_die->GetOffset(),
5549                                 src_die->GetOffset(),
5550                                 DW_TAG_value_to_name(src_die->Tag()),
5551                                 dst_die->GetOffset(),
5552                                 DW_TAG_value_to_name(src_die->Tag()));
5553                 fast_path = false;
5554             }
5555
5556             const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5557             const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5558
5559             // Make sure the names match
5560             if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5561                 continue;
5562
5563             if (log)
5564                 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)",
5565                             src_class_die->GetOffset(),
5566                             dst_class_die->GetOffset(),
5567                             src_die->GetOffset(),
5568                             src_name,
5569                             dst_die->GetOffset(),
5570                             dst_name);
5571
5572             fast_path = false;
5573         }
5574     }
5575
5576     // Now do the work of linking the DeclContexts and Types.
5577     if (fast_path)
5578     {
5579         // We can do this quickly.  Just run across the tables index-for-index since
5580         // we know each node has matching names and tags.
5581         for (idx = 0; idx < src_size; ++idx)
5582         {
5583             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5584             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5585
5586             clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5587             if (src_decl_ctx)
5588             {
5589                 if (log)
5590                     log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5591                                  static_cast<void*>(src_decl_ctx),
5592                                  src_die->GetOffset(), dst_die->GetOffset());
5593                 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5594             }
5595             else
5596             {
5597                 if (log)
5598                     log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found",
5599                                  src_die->GetOffset(), dst_die->GetOffset());
5600             }
5601
5602             Type *src_child_type = m_die_to_type[src_die];
5603             if (src_child_type)
5604             {
5605                 if (log)
5606                     log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5607                                  static_cast<void*>(src_child_type),
5608                                  src_child_type->GetID(),
5609                                  src_die->GetOffset(), dst_die->GetOffset());
5610                 m_die_to_type[dst_die] = src_child_type;
5611             }
5612             else
5613             {
5614                 if (log)
5615                     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());
5616             }
5617         }
5618     }
5619     else
5620     {
5621         // We must do this slowly.  For each member of the destination, look
5622         // up a member in the source with the same name, check its tag, and
5623         // unique them if everything matches up.  Report failures.
5624
5625         if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5626         {
5627             src_name_to_die.Sort();
5628
5629             for (idx = 0; idx < dst_size; ++idx)
5630             {
5631                 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5632                 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5633                 src_die = src_name_to_die.Find(dst_name, NULL);
5634
5635                 if (src_die && (src_die->Tag() == dst_die->Tag()))
5636                 {
5637                     clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5638                     if (src_decl_ctx)
5639                     {
5640                         if (log)
5641                             log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5642                                          static_cast<void*>(src_decl_ctx),
5643                                          src_die->GetOffset(),
5644                                          dst_die->GetOffset());
5645                         LinkDeclContextToDIE (src_decl_ctx, dst_die);
5646                     }
5647                     else
5648                     {
5649                         if (log)
5650                             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());
5651                     }
5652
5653                     Type *src_child_type = m_die_to_type[src_die];
5654                     if (src_child_type)
5655                     {
5656                         if (log)
5657                             log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5658                                          static_cast<void*>(src_child_type),
5659                                          src_child_type->GetID(),
5660                                          src_die->GetOffset(),
5661                                          dst_die->GetOffset());
5662                         m_die_to_type[dst_die] = src_child_type;
5663                     }
5664                     else
5665                     {
5666                         if (log)
5667                             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());
5668                     }
5669                 }
5670                 else
5671                 {
5672                     if (log)
5673                         log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5674
5675                     failures.Append(dst_die);
5676                 }
5677             }
5678         }
5679     }
5680
5681     const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5682     const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5683
5684     UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5685
5686     if (src_size_artificial && dst_size_artificial)
5687     {
5688         dst_name_to_die_artificial.Sort();
5689
5690         for (idx = 0; idx < src_size_artificial; ++idx)
5691         {
5692             const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5693             src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5694             dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5695
5696             if (dst_die)
5697             {
5698                 // Both classes have the artificial types, link them
5699                 clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5700                 if (src_decl_ctx)
5701                 {
5702                     if (log)
5703                         log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5704                                      static_cast<void*>(src_decl_ctx),
5705                                      src_die->GetOffset(), dst_die->GetOffset());
5706                     LinkDeclContextToDIE (src_decl_ctx, dst_die);
5707                 }
5708                 else
5709                 {
5710                     if (log)
5711                         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());
5712                 }
5713
5714                 Type *src_child_type = m_die_to_type[src_die];
5715                 if (src_child_type)
5716                 {
5717                     if (log)
5718                         log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5719                                      static_cast<void*>(src_child_type),
5720                                      src_child_type->GetID(),
5721                                      src_die->GetOffset(), dst_die->GetOffset());
5722                     m_die_to_type[dst_die] = src_child_type;
5723                 }
5724                 else
5725                 {
5726                     if (log)
5727                         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());
5728                 }
5729             }
5730         }
5731     }
5732
5733     if (dst_size_artificial)
5734     {
5735         for (idx = 0; idx < dst_size_artificial; ++idx)
5736         {
5737             const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5738             dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5739             if (log)
5740                 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5741
5742             failures.Append(dst_die);
5743         }
5744     }
5745
5746     return (failures.Size() != 0);
5747 }
5748
5749 TypeSP
5750 SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5751 {
5752     TypeSP type_sp;
5753
5754     if (type_is_new_ptr)
5755         *type_is_new_ptr = false;
5756
5757 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5758     static DIEStack g_die_stack;
5759     DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5760 #endif
5761
5762     AccessType accessibility = eAccessNone;
5763     if (die != NULL)
5764     {
5765         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5766         if (log)
5767         {
5768             const DWARFDebugInfoEntry *context_die;
5769             clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5770
5771             GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5772                                                       die->GetOffset(),
5773                                                       static_cast<void*>(context),
5774                                                       context_die->GetOffset(),
5775                                                       DW_TAG_value_to_name(die->Tag()),
5776                                                       die->GetName(this, dwarf_cu));
5777
5778 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5779             scoped_die_logger.Push (dwarf_cu, die);
5780             g_die_stack.LogDIEs(log, this);
5781 #endif
5782         }
5783 //
5784 //        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5785 //        if (log && dwarf_cu)
5786 //        {
5787 //            StreamString s;
5788 //            die->DumpLocation (this, dwarf_cu, s);
5789 //            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5790 //
5791 //        }
5792
5793         Type *type_ptr = m_die_to_type.lookup (die);
5794         TypeList* type_list = GetTypeList();
5795         if (type_ptr == NULL)
5796         {
5797             ClangASTContext &ast = GetClangASTContext();
5798             if (type_is_new_ptr)
5799                 *type_is_new_ptr = true;
5800
5801             const dw_tag_t tag = die->Tag();
5802
5803             bool is_forward_declaration = false;
5804             DWARFDebugInfoEntry::Attributes attributes;
5805             const char *type_name_cstr = NULL;
5806             ConstString type_name_const_str;
5807             Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5808             uint64_t byte_size = 0;
5809             Declaration decl;
5810
5811             Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5812             ClangASTType clang_type;
5813             DWARFFormValue form_value;
5814
5815             dw_attr_t attr;
5816
5817             switch (tag)
5818             {
5819             case DW_TAG_base_type:
5820             case DW_TAG_pointer_type:
5821             case DW_TAG_reference_type:
5822             case DW_TAG_rvalue_reference_type:
5823             case DW_TAG_typedef:
5824             case DW_TAG_const_type:
5825             case DW_TAG_restrict_type:
5826             case DW_TAG_volatile_type:
5827             case DW_TAG_unspecified_type:
5828                 {
5829                     // Set a bit that lets us know that we are currently parsing this
5830                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5831
5832                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5833                     uint32_t encoding = 0;
5834                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5835
5836                     if (num_attributes > 0)
5837                     {
5838                         uint32_t i;
5839                         for (i=0; i<num_attributes; ++i)
5840                         {
5841                             attr = attributes.AttributeAtIndex(i);
5842                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5843                             {
5844                                 switch (attr)
5845                                 {
5846                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5847                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5848                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5849                                 case DW_AT_name:
5850
5851                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5852                                     // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5853                                     // include the "&"...
5854                                     if (tag == DW_TAG_reference_type)
5855                                     {
5856                                         if (strchr (type_name_cstr, '&') == NULL)
5857                                             type_name_cstr = NULL;
5858                                     }
5859                                     if (type_name_cstr)
5860                                         type_name_const_str.SetCString(type_name_cstr);
5861                                     break;
5862                                 case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5863                                 case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5864                                 case DW_AT_type:        encoding_uid = form_value.Reference(); break;
5865                                 default:
5866                                 case DW_AT_sibling:
5867                                     break;
5868                                 }
5869                             }
5870                         }
5871                     }
5872
5873                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5874
5875                     switch (tag)
5876                     {
5877                     default:
5878                         break;
5879
5880                     case DW_TAG_unspecified_type:
5881                         if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5882                             strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5883                         {
5884                             resolve_state = Type::eResolveStateFull;
5885                             clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5886                             break;
5887                         }
5888                         // Fall through to base type below in case we can handle the type there...
5889
5890                     case DW_TAG_base_type:
5891                         resolve_state = Type::eResolveStateFull;
5892                         clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5893                                                                                    encoding,
5894                                                                                    byte_size * 8);
5895                         break;
5896
5897                     case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5898                     case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5899                     case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5900                     case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5901                     case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5902                     case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5903                     case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5904                     }
5905
5906                     if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5907                     {
5908                         bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5909
5910                         if (translation_unit_is_objc)
5911                         {
5912                             if (type_name_cstr != NULL)
5913                             {
5914                                 static ConstString g_objc_type_name_id("id");
5915                                 static ConstString g_objc_type_name_Class("Class");
5916                                 static ConstString g_objc_type_name_selector("SEL");
5917
5918                                 if (type_name_const_str == g_objc_type_name_id)
5919                                 {
5920                                     if (log)
5921                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5922                                                                                   die->GetOffset(),
5923                                                                                   DW_TAG_value_to_name(die->Tag()),
5924                                                                                   die->GetName(this, dwarf_cu));
5925                                     clang_type = ast.GetBasicType(eBasicTypeObjCID);
5926                                     encoding_data_type = Type::eEncodingIsUID;
5927                                     encoding_uid = LLDB_INVALID_UID;
5928                                     resolve_state = Type::eResolveStateFull;
5929
5930                                 }
5931                                 else if (type_name_const_str == g_objc_type_name_Class)
5932                                 {
5933                                     if (log)
5934                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5935                                                                                   die->GetOffset(),
5936                                                                                   DW_TAG_value_to_name(die->Tag()),
5937                                                                                   die->GetName(this, dwarf_cu));
5938                                     clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5939                                     encoding_data_type = Type::eEncodingIsUID;
5940                                     encoding_uid = LLDB_INVALID_UID;
5941                                     resolve_state = Type::eResolveStateFull;
5942                                 }
5943                                 else if (type_name_const_str == g_objc_type_name_selector)
5944                                 {
5945                                     if (log)
5946                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5947                                                                                   die->GetOffset(),
5948                                                                                   DW_TAG_value_to_name(die->Tag()),
5949                                                                                   die->GetName(this, dwarf_cu));
5950                                     clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5951                                     encoding_data_type = Type::eEncodingIsUID;
5952                                     encoding_uid = LLDB_INVALID_UID;
5953                                     resolve_state = Type::eResolveStateFull;
5954                                 }
5955                             }
5956                             else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5957                             {
5958                                 // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5959
5960                                 DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5961
5962                                 if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5963                                 {
5964                                     if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5965                                     {
5966                                         if (!strcmp(struct_name, "objc_object"))
5967                                         {
5968                                             if (log)
5969                                                 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5970                                                                                           die->GetOffset(),
5971                                                                                           DW_TAG_value_to_name(die->Tag()),
5972                                                                                           die->GetName(this, dwarf_cu));
5973                                             clang_type = ast.GetBasicType(eBasicTypeObjCID);
5974                                             encoding_data_type = Type::eEncodingIsUID;
5975                                             encoding_uid = LLDB_INVALID_UID;
5976                                             resolve_state = Type::eResolveStateFull;
5977                                         }
5978                                     }
5979                                 }
5980                             }
5981                         }
5982                     }
5983
5984                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5985                                              this,
5986                                              type_name_const_str,
5987                                              byte_size,
5988                                              NULL,
5989                                              encoding_uid,
5990                                              encoding_data_type,
5991                                              &decl,
5992                                              clang_type,
5993                                              resolve_state));
5994
5995                     m_die_to_type[die] = type_sp.get();
5996
5997 //                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5998 //                  if (encoding_type != NULL)
5999 //                  {
6000 //                      if (encoding_type != DIE_IS_BEING_PARSED)
6001 //                          type_sp->SetEncodingType(encoding_type);
6002 //                      else
6003 //                          m_indirect_fixups.push_back(type_sp.get());
6004 //                  }
6005                 }
6006                 break;
6007
6008             case DW_TAG_structure_type:
6009             case DW_TAG_union_type:
6010             case DW_TAG_class_type:
6011                 {
6012                     // Set a bit that lets us know that we are currently parsing this
6013                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6014                     bool byte_size_valid = false;
6015
6016                     LanguageType class_language = eLanguageTypeUnknown;
6017                     bool is_complete_objc_class = false;
6018                     //bool struct_is_class = false;
6019                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6020                     if (num_attributes > 0)
6021                     {
6022                         uint32_t i;
6023                         for (i=0; i<num_attributes; ++i)
6024                         {
6025                             attr = attributes.AttributeAtIndex(i);
6026                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6027                             {
6028                                 switch (attr)
6029                                 {
6030                                 case DW_AT_decl_file:
6031                                     if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
6032                                     {
6033                                         // llvm-gcc outputs invalid DW_AT_decl_file attributes that always
6034                                         // point to the compile unit file, so we clear this invalid value
6035                                         // so that we can still unique types efficiently.
6036                                         decl.SetFile(FileSpec ("<invalid>", false));
6037                                     }
6038                                     else
6039                                         decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
6040                                     break;
6041
6042                                 case DW_AT_decl_line:
6043                                     decl.SetLine(form_value.Unsigned());
6044                                     break;
6045
6046                                 case DW_AT_decl_column:
6047                                     decl.SetColumn(form_value.Unsigned());
6048                                     break;
6049
6050                                 case DW_AT_name:
6051                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6052                                     type_name_const_str.SetCString(type_name_cstr);
6053                                     break;
6054
6055                                 case DW_AT_byte_size:
6056                                     byte_size = form_value.Unsigned();
6057                                     byte_size_valid = true;
6058                                     break;
6059
6060                                 case DW_AT_accessibility:
6061                                     accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
6062                                     break;
6063
6064                                 case DW_AT_declaration:
6065                                     is_forward_declaration = form_value.Boolean();
6066                                     break;
6067
6068                                 case DW_AT_APPLE_runtime_class:
6069                                     class_language = (LanguageType)form_value.Signed();
6070                                     break;
6071
6072                                 case DW_AT_APPLE_objc_complete_type:
6073                                     is_complete_objc_class = form_value.Signed();
6074                                     break;
6075
6076                                 case DW_AT_allocated:
6077                                 case DW_AT_associated:
6078                                 case DW_AT_data_location:
6079                                 case DW_AT_description:
6080                                 case DW_AT_start_scope:
6081                                 case DW_AT_visibility:
6082                                 default:
6083                                 case DW_AT_sibling:
6084                                     break;
6085                                 }
6086                             }
6087                         }
6088                     }
6089
6090                     // UniqueDWARFASTType is large, so don't create a local variables on the
6091                     // stack, put it on the heap. This function is often called recursively
6092                     // and clang isn't good and sharing the stack space for variables in different blocks.
6093                     std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType());
6094
6095                     // Only try and unique the type if it has a name.
6096                     if (type_name_const_str &&
6097                         GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
6098                                                          this,
6099                                                          dwarf_cu,
6100                                                          die,
6101                                                          decl,
6102                                                          byte_size_valid ? byte_size : -1,
6103                                                          *unique_ast_entry_ap))
6104                     {
6105                         // We have already parsed this type or from another
6106                         // compile unit. GCC loves to use the "one definition
6107                         // rule" which can result in multiple definitions
6108                         // of the same class over and over in each compile
6109                         // unit.
6110                         type_sp = unique_ast_entry_ap->m_type_sp;
6111                         if (type_sp)
6112                         {
6113                             m_die_to_type[die] = type_sp.get();
6114                             return type_sp;
6115                         }
6116                     }
6117
6118                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6119
6120                     int tag_decl_kind = -1;
6121                     AccessType default_accessibility = eAccessNone;
6122                     if (tag == DW_TAG_structure_type)
6123                     {
6124                         tag_decl_kind = clang::TTK_Struct;
6125                         default_accessibility = eAccessPublic;
6126                     }
6127                     else if (tag == DW_TAG_union_type)
6128                     {
6129                         tag_decl_kind = clang::TTK_Union;
6130                         default_accessibility = eAccessPublic;
6131                     }
6132                     else if (tag == DW_TAG_class_type)
6133                     {
6134                         tag_decl_kind = clang::TTK_Class;
6135                         default_accessibility = eAccessPrivate;
6136                     }
6137
6138                     if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6139                         die->HasChildren() == false &&
6140                         sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6141                     {
6142                         // Work around an issue with clang at the moment where
6143                         // forward declarations for objective C classes are emitted
6144                         // as:
6145                         //  DW_TAG_structure_type [2]
6146                         //  DW_AT_name( "ForwardObjcClass" )
6147                         //  DW_AT_byte_size( 0x00 )
6148                         //  DW_AT_decl_file( "..." )
6149                         //  DW_AT_decl_line( 1 )
6150                         //
6151                         // Note that there is no DW_AT_declaration and there are
6152                         // no children, and the byte size is zero.
6153                         is_forward_declaration = true;
6154                     }
6155
6156                     if (class_language == eLanguageTypeObjC ||
6157                         class_language == eLanguageTypeObjC_plus_plus)
6158                     {
6159                         if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6160                         {
6161                             // We have a valid eSymbolTypeObjCClass class symbol whose
6162                             // name matches the current objective C class that we
6163                             // are trying to find and this DIE isn't the complete
6164                             // definition (we checked is_complete_objc_class above and
6165                             // know it is false), so the real definition is in here somewhere
6166                             type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6167
6168                             if (!type_sp && GetDebugMapSymfile ())
6169                             {
6170                                 // We weren't able to find a full declaration in
6171                                 // this DWARF, see if we have a declaration anywhere
6172                                 // else...
6173                                 type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6174                             }
6175
6176                             if (type_sp)
6177                             {
6178                                 if (log)
6179                                 {
6180                                     GetObjectFile()->GetModule()->LogMessage (log,
6181                                                                               "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6182                                                                               static_cast<void*>(this),
6183                                                                               die->GetOffset(),
6184                                                                               DW_TAG_value_to_name(tag),
6185                                                                               type_name_cstr,
6186                                                                               type_sp->GetID());
6187                                 }
6188
6189                                 // We found a real definition for this type elsewhere
6190                                 // so lets use it and cache the fact that we found
6191                                 // a complete type for this die
6192                                 m_die_to_type[die] = type_sp.get();
6193                                 return type_sp;
6194                             }
6195                         }
6196                     }
6197
6198
6199                     if (is_forward_declaration)
6200                     {
6201                         // We have a forward declaration to a type and we need
6202                         // to try and find a full declaration. We look in the
6203                         // current type index just in case we have a forward
6204                         // declaration followed by an actual declarations in the
6205                         // DWARF. If this fails, we need to look elsewhere...
6206                         if (log)
6207                         {
6208                             GetObjectFile()->GetModule()->LogMessage (log,
6209                                                                       "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6210                                                                       static_cast<void*>(this),
6211                                                                       die->GetOffset(),
6212                                                                       DW_TAG_value_to_name(tag),
6213                                                                       type_name_cstr);
6214                         }
6215
6216                         DWARFDeclContext die_decl_ctx;
6217                         die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6218
6219                         //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6220                         type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6221
6222                         if (!type_sp && GetDebugMapSymfile ())
6223                         {
6224                             // We weren't able to find a full declaration in
6225                             // this DWARF, see if we have a declaration anywhere
6226                             // else...
6227                             type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6228                         }
6229
6230                         if (type_sp)
6231                         {
6232                             if (log)
6233                             {
6234                                 GetObjectFile()->GetModule()->LogMessage (log,
6235                                                                           "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6236                                                                           static_cast<void*>(this),
6237                                                                           die->GetOffset(),
6238                                                                           DW_TAG_value_to_name(tag),
6239                                                                           type_name_cstr,
6240                                                                           type_sp->GetID());
6241                             }
6242
6243                             // We found a real definition for this type elsewhere
6244                             // so lets use it and cache the fact that we found
6245                             // a complete type for this die
6246                             m_die_to_type[die] = type_sp.get();
6247                             return type_sp;
6248                         }
6249                     }
6250                     assert (tag_decl_kind != -1);
6251                     bool clang_type_was_created = false;
6252                     clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6253                     if (!clang_type)
6254                     {
6255                         const DWARFDebugInfoEntry *decl_ctx_die;
6256
6257                         clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6258                         if (accessibility == eAccessNone && decl_ctx)
6259                         {
6260                             // Check the decl context that contains this class/struct/union.
6261                             // If it is a class we must give it an accessibility.
6262                             const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6263                             if (DeclKindIsCXXClass (containing_decl_kind))
6264                                 accessibility = default_accessibility;
6265                         }
6266
6267                         ClangASTMetadata metadata;
6268                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6269                         metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6270
6271                         if (type_name_cstr && strchr (type_name_cstr, '<'))
6272                         {
6273                             ClangASTContext::TemplateParameterInfos template_param_infos;
6274                             if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6275                             {
6276                                 clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6277                                                                                                         accessibility,
6278                                                                                                         type_name_cstr,
6279                                                                                                         tag_decl_kind,
6280                                                                                                         template_param_infos);
6281
6282                                 clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6283                                                                                                                                                class_template_decl,
6284                                                                                                                                                tag_decl_kind,
6285                                                                                                                                                template_param_infos);
6286                                 clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6287                                 clang_type_was_created = true;
6288
6289                                 GetClangASTContext().SetMetadata (class_template_decl, metadata);
6290                                 GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6291                             }
6292                         }
6293
6294                         if (!clang_type_was_created)
6295                         {
6296                             clang_type_was_created = true;
6297                             clang_type = ast.CreateRecordType (decl_ctx,
6298                                                                accessibility,
6299                                                                type_name_cstr,
6300                                                                tag_decl_kind,
6301                                                                class_language,
6302                                                                &metadata);
6303                         }
6304                     }
6305
6306                     // Store a forward declaration to this class type in case any
6307                     // parameters in any class methods need it for the clang
6308                     // types for function prototypes.
6309                     LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6310                     type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6311                                              this,
6312                                              type_name_const_str,
6313                                              byte_size,
6314                                              NULL,
6315                                              LLDB_INVALID_UID,
6316                                              Type::eEncodingIsUID,
6317                                              &decl,
6318                                              clang_type,
6319                                              Type::eResolveStateForward));
6320
6321                     type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6322
6323
6324                     // Add our type to the unique type map so we don't
6325                     // end up creating many copies of the same type over
6326                     // and over in the ASTContext for our module
6327                     unique_ast_entry_ap->m_type_sp = type_sp;
6328                     unique_ast_entry_ap->m_symfile = this;
6329                     unique_ast_entry_ap->m_cu = dwarf_cu;
6330                     unique_ast_entry_ap->m_die = die;
6331                     unique_ast_entry_ap->m_declaration = decl;
6332                     unique_ast_entry_ap->m_byte_size = byte_size;
6333                     GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6334                                                        *unique_ast_entry_ap);
6335
6336                     if (is_forward_declaration && die->HasChildren())
6337                     {
6338                         // Check to see if the DIE actually has a definition, some version of GCC will
6339                         // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6340                         // members, or inheritance, so we can't trust it
6341                         const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6342                         while (child_die)
6343                         {
6344                             switch (child_die->Tag())
6345                             {
6346                                 case DW_TAG_inheritance:
6347                                 case DW_TAG_subprogram:
6348                                 case DW_TAG_member:
6349                                 case DW_TAG_APPLE_property:
6350                                 case DW_TAG_class_type:
6351                                 case DW_TAG_structure_type:
6352                                 case DW_TAG_enumeration_type:
6353                                 case DW_TAG_typedef:
6354                                 case DW_TAG_union_type:
6355                                     child_die = NULL;
6356                                     is_forward_declaration = false;
6357                                     break;
6358                                 default:
6359                                     child_die = child_die->GetSibling();
6360                                     break;
6361                             }
6362                         }
6363                     }
6364
6365                     if (!is_forward_declaration)
6366                     {
6367                         // Always start the definition for a class type so that
6368                         // if the class has child classes or types that require
6369                         // the class to be created for use as their decl contexts
6370                         // the class will be ready to accept these child definitions.
6371                         if (die->HasChildren() == false)
6372                         {
6373                             // No children for this struct/union/class, lets finish it
6374                             clang_type.StartTagDeclarationDefinition ();
6375                             clang_type.CompleteTagDeclarationDefinition ();
6376
6377                             if (tag == DW_TAG_structure_type) // this only applies in C
6378                             {
6379                                 clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6380
6381                                 if (record_decl)
6382                                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo()));
6383                             }
6384                         }
6385                         else if (clang_type_was_created)
6386                         {
6387                             // Start the definition if the class is not objective C since
6388                             // the underlying decls respond to isCompleteDefinition(). Objective
6389                             // C decls don't respond to isCompleteDefinition() so we can't
6390                             // start the declaration definition right away. For C++ class/union/structs
6391                             // we want to start the definition in case the class is needed as the
6392                             // declaration context for a contained class or type without the need
6393                             // to complete that type..
6394
6395                             if (class_language != eLanguageTypeObjC &&
6396                                 class_language != eLanguageTypeObjC_plus_plus)
6397                                 clang_type.StartTagDeclarationDefinition ();
6398
6399                             // Leave this as a forward declaration until we need
6400                             // to know the details of the type. lldb_private::Type
6401                             // will automatically call the SymbolFile virtual function
6402                             // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6403                             // When the definition needs to be defined.
6404                             m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6405                             m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6406                             clang_type.SetHasExternalStorage (true);
6407                         }
6408                     }
6409
6410                 }
6411                 break;
6412
6413             case DW_TAG_enumeration_type:
6414                 {
6415                     // Set a bit that lets us know that we are currently parsing this
6416                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6417
6418                     lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6419
6420                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6421                     if (num_attributes > 0)
6422                     {
6423                         uint32_t i;
6424
6425                         for (i=0; i<num_attributes; ++i)
6426                         {
6427                             attr = attributes.AttributeAtIndex(i);
6428                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6429                             {
6430                                 switch (attr)
6431                                 {
6432                                 case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6433                                 case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6434                                 case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6435                                 case DW_AT_name:
6436                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6437                                     type_name_const_str.SetCString(type_name_cstr);
6438                                     break;
6439                                 case DW_AT_type:            encoding_uid = form_value.Reference(); break;
6440                                 case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6441                                 case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6442                                 case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6443                                 case DW_AT_allocated:
6444                                 case DW_AT_associated:
6445                                 case DW_AT_bit_stride:
6446                                 case DW_AT_byte_stride:
6447                                 case DW_AT_data_location:
6448                                 case DW_AT_description:
6449                                 case DW_AT_start_scope:
6450                                 case DW_AT_visibility:
6451                                 case DW_AT_specification:
6452                                 case DW_AT_abstract_origin:
6453                                 case DW_AT_sibling:
6454                                     break;
6455                                 }
6456                             }
6457                         }
6458
6459                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6460
6461                         ClangASTType enumerator_clang_type;
6462                         clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6463                         if (!clang_type)
6464                         {
6465                             if (encoding_uid != DW_INVALID_OFFSET)
6466                             {
6467                                 Type *enumerator_type = ResolveTypeUID(encoding_uid);
6468                                 if (enumerator_type)
6469                                     enumerator_clang_type = enumerator_type->GetClangFullType();
6470                             }
6471
6472                             if (!enumerator_clang_type)
6473                                 enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6474                                                                                                       DW_ATE_signed,
6475                                                                                                       byte_size * 8);
6476
6477                             clang_type = ast.CreateEnumerationType (type_name_cstr,
6478                                                                     GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6479                                                                     decl,
6480                                                                     enumerator_clang_type);
6481                         }
6482                         else
6483                         {
6484                             enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6485                         }
6486
6487                         LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6488
6489                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6490                                                  this,
6491                                                  type_name_const_str,
6492                                                  byte_size,
6493                                                  NULL,
6494                                                  encoding_uid,
6495                                                  Type::eEncodingIsUID,
6496                                                  &decl,
6497                                                  clang_type,
6498                                                  Type::eResolveStateForward));
6499
6500                         clang_type.StartTagDeclarationDefinition ();
6501                         if (die->HasChildren())
6502                         {
6503                             SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6504                             bool is_signed = false;
6505                             enumerator_clang_type.IsIntegerType(is_signed);
6506                             ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6507                         }
6508                         clang_type.CompleteTagDeclarationDefinition ();
6509                     }
6510                 }
6511                 break;
6512
6513             case DW_TAG_inlined_subroutine:
6514             case DW_TAG_subprogram:
6515             case DW_TAG_subroutine_type:
6516                 {
6517                     // Set a bit that lets us know that we are currently parsing this
6518                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6519
6520                     //const char *mangled = NULL;
6521                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6522                     bool is_variadic = false;
6523                     bool is_inline = false;
6524                     bool is_static = false;
6525                     bool is_virtual = false;
6526                     bool is_explicit = false;
6527                     bool is_artificial = false;
6528                     dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6529                     dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6530                     dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6531
6532                     unsigned type_quals = 0;
6533                     clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6534
6535
6536                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6537                     if (num_attributes > 0)
6538                     {
6539                         uint32_t i;
6540                         for (i=0; i<num_attributes; ++i)
6541                         {
6542                             attr = attributes.AttributeAtIndex(i);
6543                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6544                             {
6545                                 switch (attr)
6546                                 {
6547                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6548                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6549                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6550                                 case DW_AT_name:
6551                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6552                                     type_name_const_str.SetCString(type_name_cstr);
6553                                     break;
6554
6555                                 case DW_AT_linkage_name:
6556                                 case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6557                                 case DW_AT_type:                type_die_offset = form_value.Reference(); break;
6558                                 case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6559                                 case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6560                                 case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6561                                 case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6562                                 case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6563                                 case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6564
6565
6566                                 case DW_AT_external:
6567                                     if (form_value.Unsigned())
6568                                     {
6569                                         if (storage == clang::SC_None)
6570                                             storage = clang::SC_Extern;
6571                                         else
6572                                             storage = clang::SC_PrivateExtern;
6573                                     }
6574                                     break;
6575
6576                                 case DW_AT_specification:
6577                                     specification_die_offset = form_value.Reference();
6578                                     break;
6579
6580                                 case DW_AT_abstract_origin:
6581                                     abstract_origin_die_offset = form_value.Reference();
6582                                     break;
6583
6584                                 case DW_AT_object_pointer:
6585                                     object_pointer_die_offset = form_value.Reference();
6586                                     break;
6587
6588                                 case DW_AT_allocated:
6589                                 case DW_AT_associated:
6590                                 case DW_AT_address_class:
6591                                 case DW_AT_calling_convention:
6592                                 case DW_AT_data_location:
6593                                 case DW_AT_elemental:
6594                                 case DW_AT_entry_pc:
6595                                 case DW_AT_frame_base:
6596                                 case DW_AT_high_pc:
6597                                 case DW_AT_low_pc:
6598                                 case DW_AT_prototyped:
6599                                 case DW_AT_pure:
6600                                 case DW_AT_ranges:
6601                                 case DW_AT_recursive:
6602                                 case DW_AT_return_addr:
6603                                 case DW_AT_segment:
6604                                 case DW_AT_start_scope:
6605                                 case DW_AT_static_link:
6606                                 case DW_AT_trampoline:
6607                                 case DW_AT_visibility:
6608                                 case DW_AT_vtable_elem_location:
6609                                 case DW_AT_description:
6610                                 case DW_AT_sibling:
6611                                     break;
6612                                 }
6613                             }
6614                         }
6615                     }
6616
6617                     std::string object_pointer_name;
6618                     if (object_pointer_die_offset != DW_INVALID_OFFSET)
6619                     {
6620                         // Get the name from the object pointer die
6621                         StreamString s;
6622                         if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6623                         {
6624                             object_pointer_name.assign(s.GetData());
6625                         }
6626                     }
6627
6628                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6629
6630                     ClangASTType return_clang_type;
6631                     Type *func_type = NULL;
6632
6633                     if (type_die_offset != DW_INVALID_OFFSET)
6634                         func_type = ResolveTypeUID(type_die_offset);
6635
6636                     if (func_type)
6637                         return_clang_type = func_type->GetClangForwardType();
6638                     else
6639                         return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6640
6641
6642                     std::vector<ClangASTType> function_param_types;
6643                     std::vector<clang::ParmVarDecl*> function_param_decls;
6644
6645                     // Parse the function children for the parameters
6646
6647                     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6648                     clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6649                     const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6650
6651                     const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6652                     // Start off static. This will be set to false in ParseChildParameters(...)
6653                     // if we find a "this" parameters as the first parameter
6654                     if (is_cxx_method)
6655                         is_static = true;
6656
6657                     if (die->HasChildren())
6658                     {
6659                         bool skip_artificial = true;
6660                         ParseChildParameters (sc,
6661                                               containing_decl_ctx,
6662                                               dwarf_cu,
6663                                               die,
6664                                               skip_artificial,
6665                                               is_static,
6666                                               is_variadic,
6667                                               function_param_types,
6668                                               function_param_decls,
6669                                               type_quals);
6670                     }
6671
6672                     // clang_type will get the function prototype clang type after this call
6673                     clang_type = ast.CreateFunctionType (return_clang_type,
6674                                                          function_param_types.data(),
6675                                                          function_param_types.size(),
6676                                                          is_variadic,
6677                                                          type_quals);
6678
6679                     bool ignore_containing_context = false;
6680
6681                     if (type_name_cstr)
6682                     {
6683                         bool type_handled = false;
6684                         if (tag == DW_TAG_subprogram)
6685                         {
6686                             ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6687                             if (objc_method.IsValid(true))
6688                             {
6689                                 ClangASTType class_opaque_type;
6690                                 ConstString class_name(objc_method.GetClassName());
6691                                 if (class_name)
6692                                 {
6693                                     TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6694
6695                                     if (complete_objc_class_type_sp)
6696                                     {
6697                                         ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6698                                         if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6699                                             class_opaque_type = type_clang_forward_type;
6700                                     }
6701                                 }
6702
6703                                 if (class_opaque_type)
6704                                 {
6705                                     // If accessibility isn't set to anything valid, assume public for
6706                                     // now...
6707                                     if (accessibility == eAccessNone)
6708                                         accessibility = eAccessPublic;
6709
6710                                     clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6711                                                                                                                            clang_type,
6712                                                                                                                            accessibility,
6713                                                                                                                            is_artificial);
6714                                     type_handled = objc_method_decl != NULL;
6715                                     if (type_handled)
6716                                     {
6717                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6718                                         GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6719                                     }
6720                                     else
6721                                     {
6722                                         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",
6723                                                                                    die->GetOffset(),
6724                                                                                    tag,
6725                                                                                    DW_TAG_value_to_name(tag));
6726                                     }
6727                                 }
6728                             }
6729                             else if (is_cxx_method)
6730                             {
6731                                 // Look at the parent of this DIE and see if is is
6732                                 // a class or struct and see if this is actually a
6733                                 // C++ method
6734                                 Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6735                                 if (class_type)
6736                                 {
6737                                     if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6738                                     {
6739                                         // We uniqued the parent class of this function to another class
6740                                         // so we now need to associate all dies under "decl_ctx_die" to
6741                                         // DIEs in the DIE for "class_type"...
6742                                         SymbolFileDWARF *class_symfile = NULL;
6743                                         DWARFCompileUnitSP class_type_cu_sp;
6744                                         const DWARFDebugInfoEntry *class_type_die = NULL;
6745
6746                                         SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6747                                         if (debug_map_symfile)
6748                                         {
6749                                             class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6750                                             class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6751                                         }
6752                                         else
6753                                         {
6754                                             class_symfile = this;
6755                                             class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6756                                         }
6757                                         if (class_type_die)
6758                                         {
6759                                             DWARFDIECollection failures;
6760
6761                                             CopyUniqueClassMethodTypes (class_symfile,
6762                                                                         class_type,
6763                                                                         class_type_cu_sp.get(),
6764                                                                         class_type_die,
6765                                                                         dwarf_cu,
6766                                                                         decl_ctx_die,
6767                                                                         failures);
6768
6769                                             // FIXME do something with these failures that's smarter than
6770                                             // just dropping them on the ground.  Unfortunately classes don't
6771                                             // like having stuff added to them after their definitions are
6772                                             // complete...
6773
6774                                             type_ptr = m_die_to_type[die];
6775                                             if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6776                                             {
6777                                                 type_sp = type_ptr->shared_from_this();
6778                                                 break;
6779                                             }
6780                                         }
6781                                     }
6782
6783                                     if (specification_die_offset != DW_INVALID_OFFSET)
6784                                     {
6785                                         // We have a specification which we are going to base our function
6786                                         // prototype off of, so we need this type to be completed so that the
6787                                         // m_die_to_decl_ctx for the method in the specification has a valid
6788                                         // clang decl context.
6789                                         class_type->GetClangForwardType();
6790                                         // If we have a specification, then the function type should have been
6791                                         // made with the specification and not with this die.
6792                                         DWARFCompileUnitSP spec_cu_sp;
6793                                         const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6794                                         clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6795                                         if (spec_clang_decl_ctx)
6796                                         {
6797                                             LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6798                                         }
6799                                         else
6800                                         {
6801                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6802                                                                                          MakeUserID(die->GetOffset()),
6803                                                                                          specification_die_offset);
6804                                         }
6805                                         type_handled = true;
6806                                     }
6807                                     else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6808                                     {
6809                                         // We have a specification which we are going to base our function
6810                                         // prototype off of, so we need this type to be completed so that the
6811                                         // m_die_to_decl_ctx for the method in the abstract origin has a valid
6812                                         // clang decl context.
6813                                         class_type->GetClangForwardType();
6814
6815                                         DWARFCompileUnitSP abs_cu_sp;
6816                                         const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6817                                         clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6818                                         if (abs_clang_decl_ctx)
6819                                         {
6820                                             LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6821                                         }
6822                                         else
6823                                         {
6824                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6825                                                                                          MakeUserID(die->GetOffset()),
6826                                                                                          abstract_origin_die_offset);
6827                                         }
6828                                         type_handled = true;
6829                                     }
6830                                     else
6831                                     {
6832                                         ClangASTType class_opaque_type = class_type->GetClangForwardType();
6833                                         if (class_opaque_type.IsCXXClassType ())
6834                                         {
6835                                             if (class_opaque_type.IsBeingDefined ())
6836                                             {
6837                                                 // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6838                                                 // in the DWARF for C++ methods... Default to public for now...
6839                                                 if (accessibility == eAccessNone)
6840                                                     accessibility = eAccessPublic;
6841
6842                                                 if (!is_static && !die->HasChildren())
6843                                                 {
6844                                                     // We have a C++ member function with no children (this pointer!)
6845                                                     // and clang will get mad if we try and make a function that isn't
6846                                                     // well formed in the DWARF, so we will just skip it...
6847                                                     type_handled = true;
6848                                                 }
6849                                                 else
6850                                                 {
6851                                                     clang::CXXMethodDecl *cxx_method_decl;
6852                                                     // REMOVE THE CRASH DESCRIPTION BELOW
6853                                                     Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6854                                                                                          type_name_cstr,
6855                                                                                          class_type->GetName().GetCString(),
6856                                                                                          MakeUserID(die->GetOffset()),
6857                                                                                          m_obj_file->GetFileSpec().GetPath().c_str());
6858
6859                                                     const bool is_attr_used = false;
6860
6861                                                     cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6862                                                                                                                   clang_type,
6863                                                                                                                   accessibility,
6864                                                                                                                   is_virtual,
6865                                                                                                                   is_static,
6866                                                                                                                   is_inline,
6867                                                                                                                   is_explicit,
6868                                                                                                                   is_attr_used,
6869                                                                                                                   is_artificial);
6870
6871                                                     type_handled = cxx_method_decl != NULL;
6872
6873                                                     if (type_handled)
6874                                                     {
6875                                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6876
6877                                                         Host::SetCrashDescription (NULL);
6878
6879
6880                                                         ClangASTMetadata metadata;
6881                                                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6882
6883                                                         if (!object_pointer_name.empty())
6884                                                         {
6885                                                             metadata.SetObjectPtrName(object_pointer_name.c_str());
6886                                                             if (log)
6887                                                                 log->Printf ("Setting object pointer name: %s on method object %p.\n",
6888                                                                              object_pointer_name.c_str(),
6889                                                                              static_cast<void*>(cxx_method_decl));
6890                                                         }
6891                                                         GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6892                                                     }
6893                                                     else
6894                                                     {
6895                                                         ignore_containing_context = true;
6896                                                     }
6897                                                 }
6898                                             }
6899                                             else
6900                                             {
6901                                                 // We were asked to parse the type for a method in a class, yet the
6902                                                 // class hasn't been asked to complete itself through the
6903                                                 // clang::ExternalASTSource protocol, so we need to just have the
6904                                                 // class complete itself and do things the right way, then our
6905                                                 // DIE should then have an entry in the m_die_to_type map. First
6906                                                 // we need to modify the m_die_to_type so it doesn't think we are
6907                                                 // trying to parse this DIE anymore...
6908                                                 m_die_to_type[die] = NULL;
6909
6910                                                 // Now we get the full type to force our class type to complete itself
6911                                                 // using the clang::ExternalASTSource protocol which will parse all
6912                                                 // base classes and all methods (including the method for this DIE).
6913                                                 class_type->GetClangFullType();
6914
6915                                                 // The type for this DIE should have been filled in the function call above
6916                                                 type_ptr = m_die_to_type[die];
6917                                                 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6918                                                 {
6919                                                     type_sp = type_ptr->shared_from_this();
6920                                                     break;
6921                                                 }
6922
6923                                                 // FIXME This is fixing some even uglier behavior but we really need to
6924                                                 // uniq the methods of each class as well as the class itself.
6925                                                 // <rdar://problem/11240464>
6926                                                 type_handled = true;
6927                                             }
6928                                         }
6929                                     }
6930                                 }
6931                             }
6932                         }
6933
6934                         if (!type_handled)
6935                         {
6936                             // We just have a function that isn't part of a class
6937                             clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6938                                                                                                 type_name_cstr,
6939                                                                                                 clang_type,
6940                                                                                                 storage,
6941                                                                                                 is_inline);
6942
6943 //                            if (template_param_infos.GetSize() > 0)
6944 //                            {
6945 //                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6946 //                                                                                                                  function_decl,
6947 //                                                                                                                  type_name_cstr,
6948 //                                                                                                                  template_param_infos);
6949 //
6950 //                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6951 //                                                                              func_template_decl,
6952 //                                                                              template_param_infos);
6953 //                            }
6954                             // Add the decl to our DIE to decl context map
6955                             assert (function_decl);
6956                             LinkDeclContextToDIE(function_decl, die);
6957                             if (!function_param_decls.empty())
6958                                 ast.SetFunctionParameters (function_decl,
6959                                                            &function_param_decls.front(),
6960                                                            function_param_decls.size());
6961
6962                             ClangASTMetadata metadata;
6963                             metadata.SetUserID(MakeUserID(die->GetOffset()));
6964
6965                             if (!object_pointer_name.empty())
6966                             {
6967                                 metadata.SetObjectPtrName(object_pointer_name.c_str());
6968                                 if (log)
6969                                     log->Printf ("Setting object pointer name: %s on function object %p.",
6970                                                  object_pointer_name.c_str(),
6971                                                  static_cast<void*>(function_decl));
6972                             }
6973                             GetClangASTContext().SetMetadata (function_decl, metadata);
6974                         }
6975                     }
6976                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6977                                              this,
6978                                              type_name_const_str,
6979                                              0,
6980                                              NULL,
6981                                              LLDB_INVALID_UID,
6982                                              Type::eEncodingIsUID,
6983                                              &decl,
6984                                              clang_type,
6985                                              Type::eResolveStateFull));
6986                     assert(type_sp.get());
6987                 }
6988                 break;
6989
6990             case DW_TAG_array_type:
6991                 {
6992                     // Set a bit that lets us know that we are currently parsing this
6993                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6994
6995                     lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6996                     int64_t first_index = 0;
6997                     uint32_t byte_stride = 0;
6998                     uint32_t bit_stride = 0;
6999                     bool is_vector = false;
7000                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7001
7002                     if (num_attributes > 0)
7003                     {
7004                         uint32_t i;
7005                         for (i=0; i<num_attributes; ++i)
7006                         {
7007                             attr = attributes.AttributeAtIndex(i);
7008                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7009                             {
7010                                 switch (attr)
7011                                 {
7012                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7013                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7014                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7015                                 case DW_AT_name:
7016                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
7017                                     type_name_const_str.SetCString(type_name_cstr);
7018                                     break;
7019
7020                                 case DW_AT_type:            type_die_offset = form_value.Reference(); break;
7021                                 case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
7022                                 case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
7023                                 case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
7024                                 case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
7025                                 case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7026                                 case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
7027                                 case DW_AT_allocated:
7028                                 case DW_AT_associated:
7029                                 case DW_AT_data_location:
7030                                 case DW_AT_description:
7031                                 case DW_AT_ordering:
7032                                 case DW_AT_start_scope:
7033                                 case DW_AT_visibility:
7034                                 case DW_AT_specification:
7035                                 case DW_AT_abstract_origin:
7036                                 case DW_AT_sibling:
7037                                     break;
7038                                 }
7039                             }
7040                         }
7041
7042                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
7043
7044                         Type *element_type = ResolveTypeUID(type_die_offset);
7045
7046                         if (element_type)
7047                         {
7048                             std::vector<uint64_t> element_orders;
7049                             ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
7050                             if (byte_stride == 0 && bit_stride == 0)
7051                                 byte_stride = element_type->GetByteSize();
7052                             ClangASTType array_element_type = element_type->GetClangForwardType();
7053                             uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
7054                             if (element_orders.size() > 0)
7055                             {
7056                                 uint64_t num_elements = 0;
7057                                 std::vector<uint64_t>::const_reverse_iterator pos;
7058                                 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
7059                                 for (pos = element_orders.rbegin(); pos != end; ++pos)
7060                                 {
7061                                     num_elements = *pos;
7062                                     clang_type = ast.CreateArrayType (array_element_type,
7063                                                                       num_elements,
7064                                                                       is_vector);
7065                                     array_element_type = clang_type;
7066                                     array_element_bit_stride = num_elements ?
7067                                                                array_element_bit_stride * num_elements :
7068                                                                array_element_bit_stride;
7069                                 }
7070                             }
7071                             else
7072                             {
7073                                 clang_type = ast.CreateArrayType (array_element_type, 0, is_vector);
7074                             }
7075                             ConstString empty_name;
7076                             type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7077                                                      this,
7078                                                      empty_name,
7079                                                      array_element_bit_stride / 8,
7080                                                      NULL,
7081                                                      type_die_offset,
7082                                                      Type::eEncodingIsUID,
7083                                                      &decl,
7084                                                      clang_type,
7085                                                      Type::eResolveStateFull));
7086                             type_sp->SetEncodingType (element_type);
7087                         }
7088                     }
7089                 }
7090                 break;
7091
7092             case DW_TAG_ptr_to_member_type:
7093                 {
7094                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
7095                     dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
7096
7097                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7098
7099                     if (num_attributes > 0) {
7100                         uint32_t i;
7101                         for (i=0; i<num_attributes; ++i)
7102                         {
7103                             attr = attributes.AttributeAtIndex(i);
7104                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7105                             {
7106                                 switch (attr)
7107                                 {
7108                                     case DW_AT_type:
7109                                         type_die_offset = form_value.Reference(); break;
7110                                     case DW_AT_containing_type:
7111                                         containing_type_die_offset = form_value.Reference(); break;
7112                                 }
7113                             }
7114                         }
7115
7116                         Type *pointee_type = ResolveTypeUID(type_die_offset);
7117                         Type *class_type = ResolveTypeUID(containing_type_die_offset);
7118
7119                         ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
7120                         ClangASTType class_clang_type = class_type->GetClangLayoutType();
7121
7122                         clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
7123
7124                         byte_size = clang_type.GetByteSize(nullptr);
7125
7126                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7127                                                  this,
7128                                                  type_name_const_str,
7129                                                  byte_size,
7130                                                  NULL,
7131                                                  LLDB_INVALID_UID,
7132                                                  Type::eEncodingIsUID,
7133                                                  NULL,
7134                                                  clang_type,
7135                                                  Type::eResolveStateForward));
7136                     }
7137
7138                     break;
7139                 }
7140             default:
7141                 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",
7142                                                            die->GetOffset(),
7143                                                            tag,
7144                                                            DW_TAG_value_to_name(tag));
7145                 break;
7146             }
7147
7148             if (type_sp.get())
7149             {
7150                 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7151                 dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7152
7153                 SymbolContextScope * symbol_context_scope = NULL;
7154                 if (sc_parent_tag == DW_TAG_compile_unit)
7155                 {
7156                     symbol_context_scope = sc.comp_unit;
7157                 }
7158                 else if (sc.function != NULL && sc_parent_die)
7159                 {
7160                     symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7161                     if (symbol_context_scope == NULL)
7162                         symbol_context_scope = sc.function;
7163                 }
7164
7165                 if (symbol_context_scope != NULL)
7166                 {
7167                     type_sp->SetSymbolContextScope(symbol_context_scope);
7168                 }
7169
7170                 // We are ready to put this type into the uniqued list up at the module level
7171                 type_list->Insert (type_sp);
7172
7173                 m_die_to_type[die] = type_sp.get();
7174             }
7175         }
7176         else if (type_ptr != DIE_IS_BEING_PARSED)
7177         {
7178             type_sp = type_ptr->shared_from_this();
7179         }
7180     }
7181     return type_sp;
7182 }
7183
7184 size_t
7185 SymbolFileDWARF::ParseTypes
7186 (
7187     const SymbolContext& sc,
7188     DWARFCompileUnit* dwarf_cu,
7189     const DWARFDebugInfoEntry *die,
7190     bool parse_siblings,
7191     bool parse_children
7192 )
7193 {
7194     size_t types_added = 0;
7195     while (die != NULL)
7196     {
7197         bool type_is_new = false;
7198         if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7199         {
7200             if (type_is_new)
7201                 ++types_added;
7202         }
7203
7204         if (parse_children && die->HasChildren())
7205         {
7206             if (die->Tag() == DW_TAG_subprogram)
7207             {
7208                 SymbolContext child_sc(sc);
7209                 child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7210                 types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7211             }
7212             else
7213                 types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7214         }
7215
7216         if (parse_siblings)
7217             die = die->GetSibling();
7218         else
7219             die = NULL;
7220     }
7221     return types_added;
7222 }
7223
7224
7225 size_t
7226 SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7227 {
7228     assert(sc.comp_unit && sc.function);
7229     size_t functions_added = 0;
7230     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7231     if (dwarf_cu)
7232     {
7233         dw_offset_t function_die_offset = sc.function->GetID();
7234         const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7235         if (function_die)
7236         {
7237             ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7238         }
7239     }
7240
7241     return functions_added;
7242 }
7243
7244
7245 size_t
7246 SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7247 {
7248     // At least a compile unit must be valid
7249     assert(sc.comp_unit);
7250     size_t types_added = 0;
7251     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7252     if (dwarf_cu)
7253     {
7254         if (sc.function)
7255         {
7256             dw_offset_t function_die_offset = sc.function->GetID();
7257             const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7258             if (func_die && func_die->HasChildren())
7259             {
7260                 types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7261             }
7262         }
7263         else
7264         {
7265             const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7266             if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7267             {
7268                 types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7269             }
7270         }
7271     }
7272
7273     return types_added;
7274 }
7275
7276 size_t
7277 SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7278 {
7279     if (sc.comp_unit != NULL)
7280     {
7281         DWARFDebugInfo* info = DebugInfo();
7282         if (info == NULL)
7283             return 0;
7284
7285         if (sc.function)
7286         {
7287             DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7288
7289             if (dwarf_cu == NULL)
7290                 return 0;
7291
7292             const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7293
7294             dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7295             if (func_lo_pc != LLDB_INVALID_ADDRESS)
7296             {
7297                 const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7298
7299                 // Let all blocks know they have parse all their variables
7300                 sc.function->GetBlock (false).SetDidParseVariables (true, true);
7301                 return num_variables;
7302             }
7303         }
7304         else if (sc.comp_unit)
7305         {
7306             DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7307
7308             if (dwarf_cu == NULL)
7309                 return 0;
7310
7311             uint32_t vars_added = 0;
7312             VariableListSP variables (sc.comp_unit->GetVariableList(false));
7313
7314             if (variables.get() == NULL)
7315             {
7316                 variables.reset(new VariableList());
7317                 sc.comp_unit->SetVariableList(variables);
7318
7319                 DWARFCompileUnit* match_dwarf_cu = NULL;
7320                 const DWARFDebugInfoEntry* die = NULL;
7321                 DIEArray die_offsets;
7322                 if (m_using_apple_tables)
7323                 {
7324                     if (m_apple_names_ap.get())
7325                     {
7326                         DWARFMappedHash::DIEInfoArray hash_data_array;
7327                         if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7328                                                                     dwarf_cu->GetNextCompileUnitOffset(),
7329                                                                     hash_data_array))
7330                         {
7331                             DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7332                         }
7333                     }
7334                 }
7335                 else
7336                 {
7337                     // Index if we already haven't to make sure the compile units
7338                     // get indexed and make their global DIE index list
7339                     if (!m_indexed)
7340                         Index ();
7341
7342                     m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7343                                                                  dwarf_cu->GetNextCompileUnitOffset(),
7344                                                                  die_offsets);
7345                 }
7346
7347                 const size_t num_matches = die_offsets.size();
7348                 if (num_matches)
7349                 {
7350                     DWARFDebugInfo* debug_info = DebugInfo();
7351                     for (size_t i=0; i<num_matches; ++i)
7352                     {
7353                         const dw_offset_t die_offset = die_offsets[i];
7354                         die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7355                         if (die)
7356                         {
7357                             VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7358                             if (var_sp)
7359                             {
7360                                 variables->AddVariableIfUnique (var_sp);
7361                                 ++vars_added;
7362                             }
7363                         }
7364                         else
7365                         {
7366                             if (m_using_apple_tables)
7367                             {
7368                                 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7369                             }
7370                         }
7371
7372                     }
7373                 }
7374             }
7375             return vars_added;
7376         }
7377     }
7378     return 0;
7379 }
7380
7381
7382 VariableSP
7383 SymbolFileDWARF::ParseVariableDIE
7384 (
7385     const SymbolContext& sc,
7386     DWARFCompileUnit* dwarf_cu,
7387     const DWARFDebugInfoEntry *die,
7388     const lldb::addr_t func_low_pc
7389 )
7390 {
7391     VariableSP var_sp (m_die_to_variable_sp[die]);
7392     if (var_sp)
7393         return var_sp;  // Already been parsed!
7394
7395     const dw_tag_t tag = die->Tag();
7396     ModuleSP module = GetObjectFile()->GetModule();
7397
7398     if ((tag == DW_TAG_variable) ||
7399         (tag == DW_TAG_constant) ||
7400         (tag == DW_TAG_formal_parameter && sc.function))
7401     {
7402         DWARFDebugInfoEntry::Attributes attributes;
7403         const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7404         if (num_attributes > 0)
7405         {
7406             const char *name = NULL;
7407             const char *mangled = NULL;
7408             Declaration decl;
7409             uint32_t i;
7410             lldb::user_id_t type_uid = LLDB_INVALID_UID;
7411             DWARFExpression location;
7412             bool is_external = false;
7413             bool is_artificial = false;
7414             bool location_is_const_value_data = false;
7415             bool has_explicit_location = false;
7416             DWARFFormValue const_value;
7417             //AccessType accessibility = eAccessNone;
7418
7419             for (i=0; i<num_attributes; ++i)
7420             {
7421                 dw_attr_t attr = attributes.AttributeAtIndex(i);
7422                 DWARFFormValue form_value;
7423
7424                 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7425                 {
7426                     switch (attr)
7427                     {
7428                     case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7429                     case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7430                     case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7431                     case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7432                     case DW_AT_linkage_name:
7433                     case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7434                     case DW_AT_type:        type_uid = form_value.Reference(); break;
7435                     case DW_AT_external:    is_external = form_value.Boolean(); break;
7436                     case DW_AT_const_value:
7437                         // If we have already found a DW_AT_location attribute, ignore this attribute.
7438                         if (!has_explicit_location)
7439                         {
7440                             location_is_const_value_data = true;
7441                             // The constant value will be either a block, a data value or a string.
7442                             const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7443                             if (DWARFFormValue::IsBlockForm(form_value.Form()))
7444                             {
7445                                 // Retrieve the value as a block expression.
7446                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7447                                 uint32_t block_length = form_value.Unsigned();
7448                                 location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
7449                             }
7450                             else if (DWARFFormValue::IsDataForm(form_value.Form()))
7451                             {
7452                                 // Retrieve the value as a data expression.
7453                                 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
7454                                 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7455                                 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7456                                 if (data_length == 0)
7457                                 {
7458                                     const uint8_t *data_pointer = form_value.BlockData();
7459                                     if (data_pointer)
7460                                     {
7461                                         form_value.Unsigned();
7462                                     }
7463                                     else if (DWARFFormValue::IsDataForm(form_value.Form()))
7464                                     {
7465                                         // we need to get the byte size of the type later after we create the variable
7466                                         const_value = form_value;
7467                                     }
7468                                 }
7469                                 else
7470                                     location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7471                             }
7472                             else
7473                             {
7474                                 // Retrieve the value as a string expression.
7475                                 if (form_value.Form() == DW_FORM_strp)
7476                                 {
7477                                     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
7478                                     uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7479                                     uint32_t data_length = fixed_form_sizes[form_value.Form()];
7480                                     location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7481                                 }
7482                                 else
7483                                 {
7484                                     const char *str = form_value.AsCString(&debug_info_data);
7485                                     uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7486                                     uint32_t string_length = strlen(str) + 1;
7487                                     location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
7488                                 }
7489                             }
7490                         }
7491                         break;
7492                     case DW_AT_location:
7493                         {
7494                             location_is_const_value_data = false;
7495                             has_explicit_location = true;
7496                             if (form_value.BlockData())
7497                             {
7498                                 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7499
7500                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7501                                 uint32_t block_length = form_value.Unsigned();
7502                                 location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
7503                             }
7504                             else
7505                             {
7506                                 const DWARFDataExtractor&    debug_loc_data = get_debug_loc_data();
7507                                 const dw_offset_t debug_loc_offset = form_value.Unsigned();
7508
7509                                 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7510                                 if (loc_list_length > 0)
7511                                 {
7512                                     location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
7513                                     assert (func_low_pc != LLDB_INVALID_ADDRESS);
7514                                     location.SetLocationListSlide (func_low_pc - attributes.CompileUnitAtIndex(i)->GetBaseAddress());
7515                                 }
7516                             }
7517                         }
7518                         break;
7519
7520                     case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7521                     case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7522                     case DW_AT_declaration:
7523                     case DW_AT_description:
7524                     case DW_AT_endianity:
7525                     case DW_AT_segment:
7526                     case DW_AT_start_scope:
7527                     case DW_AT_visibility:
7528                     default:
7529                     case DW_AT_abstract_origin:
7530                     case DW_AT_sibling:
7531                     case DW_AT_specification:
7532                         break;
7533                     }
7534                 }
7535             }
7536
7537             ValueType scope = eValueTypeInvalid;
7538
7539             const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7540             dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7541             SymbolContextScope * symbol_context_scope = NULL;
7542
7543             if (!mangled)
7544             {
7545                 // LLDB relies on the mangled name (DW_TAG_linkage_name or DW_AT_MIPS_linkage_name) to
7546                 // generate fully qualified names of global variables with commands like "frame var j".
7547                 // For example, if j were an int variable holding a value 4 and declared in a namespace
7548                 // B which in turn is contained in a namespace A, the command "frame var j" returns
7549                 // "(int) A::B::j = 4". If the compiler does not emit a linkage name, we should be able
7550                 // to generate a fully qualified name from the declaration context.
7551                 if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
7552                     LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()))
7553                 {
7554                     DWARFDeclContext decl_ctx;
7555
7556                     die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
7557                     mangled = decl_ctx.GetQualifiedNameAsConstString().GetCString();
7558                 }
7559             }
7560
7561             // DWARF doesn't specify if a DW_TAG_variable is a local, global
7562             // or static variable, so we have to do a little digging by
7563             // looking at the location of a variable to see if it contains
7564             // a DW_OP_addr opcode _somewhere_ in the definition. I say
7565             // somewhere because clang likes to combine small global variables
7566             // into the same symbol and have locations like:
7567             // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7568             // So if we don't have a DW_TAG_formal_parameter, we can look at
7569             // the location to see if it contains a DW_OP_addr opcode, and
7570             // then we can correctly classify  our variables.
7571             if (tag == DW_TAG_formal_parameter)
7572                 scope = eValueTypeVariableArgument;
7573             else
7574             {
7575                 bool op_error = false;
7576                 // Check if the location has a DW_OP_addr with any address value...
7577                 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7578                 if (!location_is_const_value_data)
7579                 {
7580                     location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7581                     if (op_error)
7582                     {
7583                         StreamString strm;
7584                         location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7585                         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());
7586                     }
7587                 }
7588
7589                 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7590                 {
7591                     if (is_external)
7592                         scope = eValueTypeVariableGlobal;
7593                     else
7594                         scope = eValueTypeVariableStatic;
7595
7596
7597                     SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7598
7599                     if (debug_map_symfile)
7600                     {
7601                         // When leaving the DWARF in the .o files on darwin,
7602                         // when we have a global variable that wasn't initialized,
7603                         // the .o file might not have allocated a virtual
7604                         // address for the global variable. In this case it will
7605                         // have created a symbol for the global variable
7606                         // that is undefined/data and external and the value will
7607                         // be the byte size of the variable. When we do the
7608                         // address map in SymbolFileDWARFDebugMap we rely on
7609                         // having an address, we need to do some magic here
7610                         // so we can get the correct address for our global
7611                         // variable. The address for all of these entries
7612                         // will be zero, and there will be an undefined symbol
7613                         // in this object file, and the executable will have
7614                         // a matching symbol with a good address. So here we
7615                         // dig up the correct address and replace it in the
7616                         // location for the variable, and set the variable's
7617                         // symbol context scope to be that of the main executable
7618                         // so the file address will resolve correctly.
7619                         bool linked_oso_file_addr = false;
7620                         if (is_external && location_DW_OP_addr == 0)
7621                         {
7622                             // we have a possible uninitialized extern global
7623                             ConstString const_name(mangled ? mangled : name);
7624                             ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7625                             if (debug_map_objfile)
7626                             {
7627                                 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7628                                 if (debug_map_symtab)
7629                                 {
7630                                     Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7631                                                                                                            eSymbolTypeData,
7632                                                                                                            Symtab::eDebugYes,
7633                                                                                                            Symtab::eVisibilityExtern);
7634                                     if (exe_symbol)
7635                                     {
7636                                         if (exe_symbol->ValueIsAddress())
7637                                         {
7638                                             const addr_t exe_file_addr = exe_symbol->GetAddressRef().GetFileAddress();
7639                                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7640                                             {
7641                                                 if (location.Update_DW_OP_addr (exe_file_addr))
7642                                                 {
7643                                                     linked_oso_file_addr = true;
7644                                                     symbol_context_scope = exe_symbol;
7645                                                 }
7646                                             }
7647                                         }
7648                                     }
7649                                 }
7650                             }
7651                         }
7652
7653                         if (!linked_oso_file_addr)
7654                         {
7655                             // The DW_OP_addr is not zero, but it contains a .o file address which
7656                             // needs to be linked up correctly.
7657                             const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7658                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7659                             {
7660                                 // Update the file address for this variable
7661                                 location.Update_DW_OP_addr (exe_file_addr);
7662                             }
7663                             else
7664                             {
7665                                 // Variable didn't make it into the final executable
7666                                 return var_sp;
7667                             }
7668                         }
7669                     }
7670                 }
7671                 else
7672                 {
7673                     scope = eValueTypeVariableLocal;
7674                 }
7675             }
7676
7677             if (symbol_context_scope == NULL)
7678             {
7679                 switch (parent_tag)
7680                 {
7681                 case DW_TAG_subprogram:
7682                 case DW_TAG_inlined_subroutine:
7683                 case DW_TAG_lexical_block:
7684                     if (sc.function)
7685                     {
7686                         symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7687                         if (symbol_context_scope == NULL)
7688                             symbol_context_scope = sc.function;
7689                     }
7690                     break;
7691
7692                 default:
7693                     symbol_context_scope = sc.comp_unit;
7694                     break;
7695                 }
7696             }
7697
7698             if (symbol_context_scope)
7699             {
7700                 SymbolFileTypeSP type_sp(new SymbolFileType(*this, type_uid));
7701
7702                 if (const_value.Form() && type_sp && type_sp->GetType())
7703                     location.CopyOpcodeData(const_value.Unsigned(), type_sp->GetType()->GetByteSize(), dwarf_cu->GetAddressByteSize());
7704
7705                 var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7706                                             name,
7707                                             mangled,
7708                                             type_sp,
7709                                             scope,
7710                                             symbol_context_scope,
7711                                             &decl,
7712                                             location,
7713                                             is_external,
7714                                             is_artificial));
7715
7716                 var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7717             }
7718             else
7719             {
7720                 // Not ready to parse this variable yet. It might be a global
7721                 // or static variable that is in a function scope and the function
7722                 // in the symbol context wasn't filled in yet
7723                 return var_sp;
7724             }
7725         }
7726         // Cache var_sp even if NULL (the variable was just a specification or
7727         // was missing vital information to be able to be displayed in the debugger
7728         // (missing location due to optimization, etc)) so we don't re-parse
7729         // this DIE over and over later...
7730         m_die_to_variable_sp[die] = var_sp;
7731     }
7732     return var_sp;
7733 }
7734
7735
7736 const DWARFDebugInfoEntry *
7737 SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7738                                                    dw_offset_t spec_block_die_offset,
7739                                                    DWARFCompileUnit **result_die_cu_handle)
7740 {
7741     // Give the concrete function die specified by "func_die_offset", find the
7742     // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7743     // to "spec_block_die_offset"
7744     DWARFDebugInfo* info = DebugInfo();
7745
7746     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7747     if (die)
7748     {
7749         assert (*result_die_cu_handle);
7750         return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7751     }
7752     return NULL;
7753 }
7754
7755
7756 const DWARFDebugInfoEntry *
7757 SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7758                                                   const DWARFDebugInfoEntry *die,
7759                                                   dw_offset_t spec_block_die_offset,
7760                                                   DWARFCompileUnit **result_die_cu_handle)
7761 {
7762     if (die)
7763     {
7764         switch (die->Tag())
7765         {
7766         case DW_TAG_subprogram:
7767         case DW_TAG_inlined_subroutine:
7768         case DW_TAG_lexical_block:
7769             {
7770                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7771                 {
7772                     *result_die_cu_handle = dwarf_cu;
7773                     return die;
7774                 }
7775
7776                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7777                 {
7778                     *result_die_cu_handle = dwarf_cu;
7779                     return die;
7780                 }
7781             }
7782             break;
7783         }
7784
7785         // Give the concrete function die specified by "func_die_offset", find the
7786         // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7787         // to "spec_block_die_offset"
7788         for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7789         {
7790             const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7791                                                                                       child_die,
7792                                                                                       spec_block_die_offset,
7793                                                                                       result_die_cu_handle);
7794             if (result_die)
7795                 return result_die;
7796         }
7797     }
7798
7799     *result_die_cu_handle = NULL;
7800     return NULL;
7801 }
7802
7803 size_t
7804 SymbolFileDWARF::ParseVariables
7805 (
7806     const SymbolContext& sc,
7807     DWARFCompileUnit* dwarf_cu,
7808     const lldb::addr_t func_low_pc,
7809     const DWARFDebugInfoEntry *orig_die,
7810     bool parse_siblings,
7811     bool parse_children,
7812     VariableList* cc_variable_list
7813 )
7814 {
7815     if (orig_die == NULL)
7816         return 0;
7817
7818     VariableListSP variable_list_sp;
7819
7820     size_t vars_added = 0;
7821     const DWARFDebugInfoEntry *die = orig_die;
7822     while (die != NULL)
7823     {
7824         dw_tag_t tag = die->Tag();
7825
7826         // Check to see if we have already parsed this variable or constant?
7827         if (m_die_to_variable_sp[die])
7828         {
7829             if (cc_variable_list)
7830                 cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7831         }
7832         else
7833         {
7834             // We haven't already parsed it, lets do that now.
7835             if ((tag == DW_TAG_variable) ||
7836                 (tag == DW_TAG_constant) ||
7837                 (tag == DW_TAG_formal_parameter && sc.function))
7838             {
7839                 if (variable_list_sp.get() == NULL)
7840                 {
7841                     const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7842                     dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7843                     switch (parent_tag)
7844                     {
7845                         case DW_TAG_compile_unit:
7846                             if (sc.comp_unit != NULL)
7847                             {
7848                                 variable_list_sp = sc.comp_unit->GetVariableList(false);
7849                                 if (variable_list_sp.get() == NULL)
7850                                 {
7851                                     variable_list_sp.reset(new VariableList());
7852                                     sc.comp_unit->SetVariableList(variable_list_sp);
7853                                 }
7854                             }
7855                             else
7856                             {
7857                                 GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7858                                                                            MakeUserID(sc_parent_die->GetOffset()),
7859                                                                            DW_TAG_value_to_name (parent_tag),
7860                                                                            MakeUserID(orig_die->GetOffset()),
7861                                                                            DW_TAG_value_to_name (orig_die->Tag()));
7862                             }
7863                             break;
7864
7865                         case DW_TAG_subprogram:
7866                         case DW_TAG_inlined_subroutine:
7867                         case DW_TAG_lexical_block:
7868                             if (sc.function != NULL)
7869                             {
7870                                 // Check to see if we already have parsed the variables for the given scope
7871
7872                                 Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7873                                 if (block == NULL)
7874                                 {
7875                                     // This must be a specification or abstract origin with
7876                                     // a concrete block counterpart in the current function. We need
7877                                     // to find the concrete block so we can correctly add the
7878                                     // variable to it
7879                                     DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7880                                     const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7881                                                                                                                       sc_parent_die->GetOffset(),
7882                                                                                                                       &concrete_block_die_cu);
7883                                     if (concrete_block_die)
7884                                         block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7885                                 }
7886
7887                                 if (block != NULL)
7888                                 {
7889                                     const bool can_create = false;
7890                                     variable_list_sp = block->GetBlockVariableList (can_create);
7891                                     if (variable_list_sp.get() == NULL)
7892                                     {
7893                                         variable_list_sp.reset(new VariableList());
7894                                         block->SetVariableList(variable_list_sp);
7895                                     }
7896                                 }
7897                             }
7898                             break;
7899
7900                         default:
7901                              GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7902                                                                         MakeUserID(orig_die->GetOffset()),
7903                                                                         DW_TAG_value_to_name (orig_die->Tag()));
7904                             break;
7905                     }
7906                 }
7907
7908                 if (variable_list_sp)
7909                 {
7910                     VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7911                     if (var_sp)
7912                     {
7913                         variable_list_sp->AddVariableIfUnique (var_sp);
7914                         if (cc_variable_list)
7915                             cc_variable_list->AddVariableIfUnique (var_sp);
7916                         ++vars_added;
7917                     }
7918                 }
7919             }
7920         }
7921
7922         bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7923
7924         if (!skip_children && parse_children && die->HasChildren())
7925         {
7926             vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7927         }
7928
7929         if (parse_siblings)
7930             die = die->GetSibling();
7931         else
7932             die = NULL;
7933     }
7934     return vars_added;
7935 }
7936
7937 //------------------------------------------------------------------
7938 // PluginInterface protocol
7939 //------------------------------------------------------------------
7940 ConstString
7941 SymbolFileDWARF::GetPluginName()
7942 {
7943     return GetPluginNameStatic();
7944 }
7945
7946 uint32_t
7947 SymbolFileDWARF::GetPluginVersion()
7948 {
7949     return 1;
7950 }
7951
7952 void
7953 SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7954 {
7955     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7956     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7957     if (clang_type)
7958         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7959 }
7960
7961 void
7962 SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7963 {
7964     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7965     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7966     if (clang_type)
7967         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7968 }
7969
7970 void
7971 SymbolFileDWARF::DumpIndexes ()
7972 {
7973     StreamFile s(stdout, false);
7974
7975     s.Printf ("DWARF index for (%s) '%s':",
7976               GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7977               GetObjectFile()->GetFileSpec().GetPath().c_str());
7978     s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7979     s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7980     s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7981     s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7982     s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7983     s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7984     s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7985     s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7986 }
7987
7988 void
7989 SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7990                                     const char *name,
7991                                     llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7992 {
7993     DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7994
7995     if (iter == m_decl_ctx_to_die.end())
7996         return;
7997
7998     for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7999     {
8000         const DWARFDebugInfoEntry *context_die = *pos;
8001
8002         if (!results)
8003             return;
8004
8005         DWARFDebugInfo* info = DebugInfo();
8006
8007         DIEArray die_offsets;
8008
8009         DWARFCompileUnit* dwarf_cu = NULL;
8010         const DWARFDebugInfoEntry* die = NULL;
8011
8012         if (m_using_apple_tables)
8013         {
8014             if (m_apple_types_ap.get())
8015                 m_apple_types_ap->FindByName (name, die_offsets);
8016         }
8017         else
8018         {
8019             if (!m_indexed)
8020                 Index ();
8021
8022             m_type_index.Find (ConstString(name), die_offsets);
8023         }
8024
8025         const size_t num_matches = die_offsets.size();
8026
8027         if (num_matches)
8028         {
8029             for (size_t i = 0; i < num_matches; ++i)
8030             {
8031                 const dw_offset_t die_offset = die_offsets[i];
8032                 die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
8033
8034                 if (die->GetParent() != context_die)
8035                     continue;
8036
8037                 Type *matching_type = ResolveType (dwarf_cu, die);
8038
8039                 clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
8040
8041                 if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
8042                 {
8043                     clang::TagDecl *tag_decl = tag_type->getDecl();
8044                     results->push_back(tag_decl);
8045                 }
8046                 else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
8047                 {
8048                     clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
8049                     results->push_back(typedef_decl);
8050                 }
8051             }
8052         }
8053     }
8054 }
8055
8056 void
8057 SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
8058                                                  const clang::DeclContext *decl_context,
8059                                                  clang::DeclarationName decl_name,
8060                                                  llvm::SmallVectorImpl <clang::NamedDecl *> *results)
8061 {
8062
8063     switch (decl_context->getDeclKind())
8064     {
8065     case clang::Decl::Namespace:
8066     case clang::Decl::TranslationUnit:
8067         {
8068             SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8069             symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
8070         }
8071         break;
8072     default:
8073         break;
8074     }
8075 }
8076
8077 bool
8078 SymbolFileDWARF::LayoutRecordType(void *baton, const clang::RecordDecl *record_decl, uint64_t &size,
8079                                   uint64_t &alignment,
8080                                   llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
8081                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8082                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8083 {
8084     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8085     return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
8086 }
8087
8088 bool
8089 SymbolFileDWARF::LayoutRecordType(const clang::RecordDecl *record_decl, uint64_t &bit_size, uint64_t &alignment,
8090                                   llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
8091                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8092                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8093 {
8094     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
8095     RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
8096     bool success = false;
8097     base_offsets.clear();
8098     vbase_offsets.clear();
8099     if (pos != m_record_decl_to_layout_map.end())
8100     {
8101         bit_size = pos->second.bit_size;
8102         alignment = pos->second.alignment;
8103         field_offsets.swap(pos->second.field_offsets);
8104         base_offsets.swap (pos->second.base_offsets);
8105         vbase_offsets.swap (pos->second.vbase_offsets);
8106         m_record_decl_to_layout_map.erase(pos);
8107         success = true;
8108     }
8109     else
8110     {
8111         bit_size = 0;
8112         alignment = 0;
8113         field_offsets.clear();
8114     }
8115
8116     if (log)
8117         GetObjectFile()->GetModule()->LogMessage (log,
8118                                                   "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
8119                                                   static_cast<const void*>(record_decl),
8120                                                   bit_size, alignment,
8121                                                   static_cast<uint32_t>(field_offsets.size()),
8122                                                   static_cast<uint32_t>(base_offsets.size()),
8123                                                   static_cast<uint32_t>(vbase_offsets.size()),
8124                                                   success);
8125     return success;
8126 }
8127
8128
8129 SymbolFileDWARFDebugMap *
8130 SymbolFileDWARF::GetDebugMapSymfile ()
8131 {
8132     if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
8133     {
8134         lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
8135         if (module_sp)
8136         {
8137             SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
8138             if (sym_vendor)
8139                 m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
8140         }
8141     }
8142     return m_debug_map_symfile;
8143 }
8144
8145