1 //===-- DWARFASTParserClang.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 <stdlib.h> 11 12 #include "DWARFASTParserClang.h" 13 #include "DWARFDIE.h" 14 #include "DWARFDIECollection.h" 15 #include "DWARFDebugInfo.h" 16 #include "DWARFDeclContext.h" 17 #include "DWARFDefines.h" 18 #include "SymbolFileDWARF.h" 19 #include "SymbolFileDWARFDwo.h" 20 #include "SymbolFileDWARFDebugMap.h" 21 #include "UniqueDWARFASTType.h" 22 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/ClangASTImporter.h" 28 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 29 #include "lldb/Symbol/ClangUtil.h" 30 #include "lldb/Symbol/CompileUnit.h" 31 #include "lldb/Symbol/Function.h" 32 #include "lldb/Symbol/ObjectFile.h" 33 #include "lldb/Symbol/SymbolVendor.h" 34 #include "lldb/Symbol/TypeList.h" 35 #include "lldb/Symbol/TypeMap.h" 36 #include "lldb/Target/Language.h" 37 #include "lldb/Utility/LLDBAssert.h" 38 #include "lldb/Utility/Log.h" 39 #include "lldb/Utility/StreamString.h" 40 41 #include "clang/AST/CXXInheritance.h" 42 #include "clang/AST/DeclCXX.h" 43 #include "clang/AST/DeclObjC.h" 44 #include "clang/AST/DeclTemplate.h" 45 46 #include <map> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 struct BitfieldInfo { 91 uint64_t bit_size; 92 uint64_t bit_offset; 93 94 BitfieldInfo() 95 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 96 97 void Clear() { 98 bit_size = LLDB_INVALID_ADDRESS; 99 bit_offset = LLDB_INVALID_ADDRESS; 100 } 101 102 bool IsValid() const { 103 return (bit_size != LLDB_INVALID_ADDRESS) && 104 (bit_offset != LLDB_INVALID_ADDRESS); 105 } 106 107 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 108 if (IsValid()) { 109 // This bitfield info is valid, so any subsequent bitfields 110 // must not overlap and must be at a higher bit offset than 111 // any previous bitfield + size. 112 return (bit_size + bit_offset) <= next_bit_offset; 113 } else { 114 // If the this BitfieldInfo is not valid, then any offset isOK 115 return true; 116 } 117 } 118 }; 119 120 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 121 if (!m_clang_ast_importer_ap) { 122 m_clang_ast_importer_ap.reset(new ClangASTImporter); 123 } 124 return *m_clang_ast_importer_ap; 125 } 126 127 /// Detect a forward declaration that is nested in a DW_TAG_module. 128 static bool isClangModuleFwdDecl(const DWARFDIE &Die) { 129 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 130 return false; 131 auto Parent = Die.GetParent(); 132 while (Parent.IsValid()) { 133 if (Parent.Tag() == DW_TAG_module) 134 return true; 135 Parent = Parent.GetParent(); 136 } 137 return false; 138 } 139 140 TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 141 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 142 if (!dwo_module_sp) 143 return TypeSP(); 144 145 // This type comes from an external DWO module. 146 std::vector<CompilerContext> dwo_context; 147 die.GetDWOContext(dwo_context); 148 TypeMap dwo_types; 149 150 if (!dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 151 dwo_types)) { 152 if (!isClangModuleFwdDecl(die)) 153 return TypeSP(); 154 155 // Since this this type is defined in one of the Clang modules 156 // imported by this symbol file, search all of them. 157 auto *SymFile = die.GetCU()->GetSymbolFileDWARF(); 158 for (const auto &NameModule : SymFile->getExternalTypeModules()) { 159 if (!NameModule.second) 160 continue; 161 SymbolVendor *SymVendor = NameModule.second->GetSymbolVendor(); 162 if (SymVendor->FindTypes(dwo_context, true, dwo_types)) 163 break; 164 } 165 } 166 167 const size_t num_dwo_types = dwo_types.GetSize(); 168 if (num_dwo_types != 1) 169 return TypeSP(); 170 171 // We found a real definition for this type in the Clang module, so 172 // lets use it and cache the fact that we found a complete type for 173 // this die. 174 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 175 if (!dwo_type_sp) 176 return TypeSP(); 177 178 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 179 180 lldb_private::CompilerType type = 181 GetClangASTImporter().CopyType(m_ast, dwo_type); 182 183 // printf ("copied_qual_type: ast = %p, clang_type = %p, name = 184 // '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), 185 // external_type->GetName().GetCString()); 186 if (!type) 187 return TypeSP(); 188 189 SymbolFileDWARF *dwarf = die.GetDWARF(); 190 TypeSP type_sp(new Type( 191 die.GetID(), dwarf, dwo_type_sp->GetName(), dwo_type_sp->GetByteSize(), 192 NULL, LLDB_INVALID_UID, Type::eEncodingInvalid, 193 &dwo_type_sp->GetDeclaration(), type, Type::eResolveStateForward)); 194 195 dwarf->GetTypeList()->Insert(type_sp); 196 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 197 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 198 if (tag_decl) 199 LinkDeclContextToDIE(tag_decl, die); 200 else { 201 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 202 if (defn_decl_ctx) 203 LinkDeclContextToDIE(defn_decl_ctx, die); 204 } 205 206 return type_sp; 207 } 208 209 static void CompleteExternalTagDeclType(ClangASTImporter &ast_importer, 210 clang::DeclContext *decl_ctx, 211 DWARFDIE die, 212 const char *type_name_cstr) { 213 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 214 if (!tag_decl_ctx) 215 return; 216 217 // If this type was not imported from an external AST, there's 218 // nothing to do. 219 CompilerType type = ClangASTContext::GetTypeForDecl(tag_decl_ctx); 220 if (!type || !ast_importer.CanImport(type)) 221 return; 222 223 auto qual_type = ClangUtil::GetQualType(type); 224 if (!ast_importer.RequireCompleteType(qual_type)) { 225 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 226 "Unable to complete the Decl context for DIE '%s' at offset " 227 "0x%8.8x.\nPlease file a bug report.", 228 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 229 // We need to make the type look complete otherwise, we 230 // might crash in Clang when adding children. 231 if (ClangASTContext::StartTagDeclarationDefinition(type)) 232 ClangASTContext::CompleteTagDeclarationDefinition(type); 233 } 234 } 235 236 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 237 const DWARFDIE &die, Log *log, 238 bool *type_is_new_ptr) { 239 TypeSP type_sp; 240 241 if (type_is_new_ptr) 242 *type_is_new_ptr = false; 243 244 AccessType accessibility = eAccessNone; 245 if (die) { 246 SymbolFileDWARF *dwarf = die.GetDWARF(); 247 if (log) { 248 DWARFDIE context_die; 249 clang::DeclContext *context = 250 GetClangDeclContextContainingDIE(die, &context_die); 251 252 dwarf->GetObjectFile()->GetModule()->LogMessage( 253 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 254 "0x%8.8x)) %s name = '%s')", 255 die.GetOffset(), static_cast<void *>(context), 256 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 257 } 258 // 259 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 260 // if (log && dwarf_cu) 261 // { 262 // StreamString s; 263 // die->DumpLocation (this, dwarf_cu, s); 264 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, 265 // "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 266 // 267 // } 268 269 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 270 TypeList *type_list = dwarf->GetTypeList(); 271 if (type_ptr == NULL) { 272 if (type_is_new_ptr) 273 *type_is_new_ptr = true; 274 275 const dw_tag_t tag = die.Tag(); 276 277 bool is_forward_declaration = false; 278 DWARFAttributes attributes; 279 const char *type_name_cstr = NULL; 280 const char *mangled_name_cstr = NULL; 281 ConstString type_name_const_str; 282 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 283 uint64_t byte_size = 0; 284 Declaration decl; 285 286 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 287 CompilerType clang_type; 288 DWARFFormValue form_value; 289 290 dw_attr_t attr; 291 292 switch (tag) { 293 case DW_TAG_typedef: 294 case DW_TAG_base_type: 295 case DW_TAG_pointer_type: 296 case DW_TAG_reference_type: 297 case DW_TAG_rvalue_reference_type: 298 case DW_TAG_const_type: 299 case DW_TAG_restrict_type: 300 case DW_TAG_volatile_type: 301 case DW_TAG_unspecified_type: { 302 // Set a bit that lets us know that we are currently parsing this 303 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 304 305 const size_t num_attributes = die.GetAttributes(attributes); 306 uint32_t encoding = 0; 307 DWARFFormValue encoding_uid; 308 309 if (num_attributes > 0) { 310 uint32_t i; 311 for (i = 0; i < num_attributes; ++i) { 312 attr = attributes.AttributeAtIndex(i); 313 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 314 switch (attr) { 315 case DW_AT_decl_file: 316 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 317 form_value.Unsigned())); 318 break; 319 case DW_AT_decl_line: 320 decl.SetLine(form_value.Unsigned()); 321 break; 322 case DW_AT_decl_column: 323 decl.SetColumn(form_value.Unsigned()); 324 break; 325 case DW_AT_name: 326 327 type_name_cstr = form_value.AsCString(); 328 // Work around a bug in llvm-gcc where they give a name to a 329 // reference type which doesn't 330 // include the "&"... 331 if (tag == DW_TAG_reference_type) { 332 if (strchr(type_name_cstr, '&') == NULL) 333 type_name_cstr = NULL; 334 } 335 if (type_name_cstr) 336 type_name_const_str.SetCString(type_name_cstr); 337 break; 338 case DW_AT_byte_size: 339 byte_size = form_value.Unsigned(); 340 break; 341 case DW_AT_encoding: 342 encoding = form_value.Unsigned(); 343 break; 344 case DW_AT_type: 345 encoding_uid = form_value; 346 break; 347 default: 348 case DW_AT_sibling: 349 break; 350 } 351 } 352 } 353 } 354 355 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 356 // Try to parse a typedef from the DWO file first as modules 357 // can contain typedef'ed structures that have no names like: 358 // 359 // typedef struct { int a; } Foo; 360 // 361 // In this case we will have a structure with no name and a 362 // typedef named "Foo" that points to this unnamed structure. 363 // The name in the typedef is the only identifier for the struct, 364 // so always try to get typedefs from DWO files if possible. 365 // 366 // The type_sp returned will be empty if the typedef doesn't exist 367 // in a DWO file, so it is cheap to call this function just to check. 368 // 369 // If we don't do this we end up creating a TypeSP that says this 370 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 371 // in the DW_TAG_typedef), and this is the unnamed structure type. 372 // We will have a hard time tracking down an unnammed structure 373 // type in the module DWO file, so we make sure we don't get into 374 // this situation by always resolving typedefs from the DWO file. 375 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 376 377 // First make sure that the die that this is typedef'ed to _is_ 378 // just a declaration (DW_AT_declaration == 1), not a full definition 379 // since template types can't be represented in modules since only 380 // concrete instances of templates are ever emitted and modules 381 // won't contain those 382 if (encoding_die && 383 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 384 1) { 385 type_sp = ParseTypeFromDWO(die, log); 386 if (type_sp) 387 return type_sp; 388 } 389 } 390 391 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 392 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 393 encoding_uid.Reference()); 394 395 switch (tag) { 396 default: 397 break; 398 399 case DW_TAG_unspecified_type: 400 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 401 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 402 resolve_state = Type::eResolveStateFull; 403 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 404 break; 405 } 406 // Fall through to base type below in case we can handle the type 407 // there... 408 LLVM_FALLTHROUGH; 409 410 case DW_TAG_base_type: 411 resolve_state = Type::eResolveStateFull; 412 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 413 type_name_cstr, encoding, byte_size * 8); 414 break; 415 416 case DW_TAG_pointer_type: 417 encoding_data_type = Type::eEncodingIsPointerUID; 418 break; 419 case DW_TAG_reference_type: 420 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 421 break; 422 case DW_TAG_rvalue_reference_type: 423 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 424 break; 425 case DW_TAG_typedef: 426 encoding_data_type = Type::eEncodingIsTypedefUID; 427 break; 428 case DW_TAG_const_type: 429 encoding_data_type = Type::eEncodingIsConstUID; 430 break; 431 case DW_TAG_restrict_type: 432 encoding_data_type = Type::eEncodingIsRestrictUID; 433 break; 434 case DW_TAG_volatile_type: 435 encoding_data_type = Type::eEncodingIsVolatileUID; 436 break; 437 } 438 439 if (!clang_type && 440 (encoding_data_type == Type::eEncodingIsPointerUID || 441 encoding_data_type == Type::eEncodingIsTypedefUID) && 442 sc.comp_unit != NULL) { 443 if (tag == DW_TAG_pointer_type) { 444 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 445 446 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 447 // Blocks have a __FuncPtr inside them which is a pointer to a 448 // function of the proper type. 449 450 for (DWARFDIE child_die = target_die.GetFirstChild(); 451 child_die.IsValid(); child_die = child_die.GetSibling()) { 452 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 453 "__FuncPtr")) { 454 DWARFDIE function_pointer_type = 455 child_die.GetReferencedDIE(DW_AT_type); 456 457 if (function_pointer_type) { 458 DWARFDIE function_type = 459 function_pointer_type.GetReferencedDIE(DW_AT_type); 460 461 bool function_type_is_new_pointer; 462 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 463 sc, function_type, log, &function_type_is_new_pointer); 464 465 if (lldb_function_type_sp) { 466 clang_type = m_ast.CreateBlockPointerType( 467 lldb_function_type_sp->GetForwardCompilerType()); 468 encoding_data_type = Type::eEncodingIsUID; 469 encoding_uid.Clear(); 470 resolve_state = Type::eResolveStateFull; 471 } 472 } 473 474 break; 475 } 476 } 477 } 478 } 479 480 bool translation_unit_is_objc = 481 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 482 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 483 484 if (translation_unit_is_objc) { 485 if (type_name_cstr != NULL) { 486 static ConstString g_objc_type_name_id("id"); 487 static ConstString g_objc_type_name_Class("Class"); 488 static ConstString g_objc_type_name_selector("SEL"); 489 490 if (type_name_const_str == g_objc_type_name_id) { 491 if (log) 492 dwarf->GetObjectFile()->GetModule()->LogMessage( 493 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 494 "is Objective C 'id' built-in type.", 495 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 496 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 497 encoding_data_type = Type::eEncodingIsUID; 498 encoding_uid.Clear(); 499 resolve_state = Type::eResolveStateFull; 500 501 } else if (type_name_const_str == g_objc_type_name_Class) { 502 if (log) 503 dwarf->GetObjectFile()->GetModule()->LogMessage( 504 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 505 "is Objective C 'Class' built-in type.", 506 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 507 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 508 encoding_data_type = Type::eEncodingIsUID; 509 encoding_uid.Clear(); 510 resolve_state = Type::eResolveStateFull; 511 } else if (type_name_const_str == g_objc_type_name_selector) { 512 if (log) 513 dwarf->GetObjectFile()->GetModule()->LogMessage( 514 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 515 "is Objective C 'selector' built-in type.", 516 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 517 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 518 encoding_data_type = Type::eEncodingIsUID; 519 encoding_uid.Clear(); 520 resolve_state = Type::eResolveStateFull; 521 } 522 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 523 encoding_uid.IsValid()) { 524 // Clang sometimes erroneously emits id as objc_object*. In that 525 // case we fix up the type to "id". 526 527 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 528 529 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 530 if (const char *struct_name = encoding_die.GetName()) { 531 if (!strcmp(struct_name, "objc_object")) { 532 if (log) 533 dwarf->GetObjectFile()->GetModule()->LogMessage( 534 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 535 "'%s' is 'objc_object*', which we overrode to " 536 "'id'.", 537 die.GetOffset(), die.GetTagAsCString(), 538 die.GetName()); 539 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 540 encoding_data_type = Type::eEncodingIsUID; 541 encoding_uid.Clear(); 542 resolve_state = Type::eResolveStateFull; 543 } 544 } 545 } 546 } 547 } 548 } 549 550 type_sp.reset( 551 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 552 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 553 &decl, clang_type, resolve_state)); 554 555 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 556 557 // Type* encoding_type = 558 // GetUniquedTypeForDIEOffset(encoding_uid, type_sp, 559 // NULL, 0, 0, false); 560 // if (encoding_type != NULL) 561 // { 562 // if (encoding_type != DIE_IS_BEING_PARSED) 563 // type_sp->SetEncodingType(encoding_type); 564 // else 565 // m_indirect_fixups.push_back(type_sp.get()); 566 // } 567 } break; 568 569 case DW_TAG_structure_type: 570 case DW_TAG_union_type: 571 case DW_TAG_class_type: { 572 // Set a bit that lets us know that we are currently parsing this 573 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 574 bool byte_size_valid = false; 575 576 LanguageType class_language = eLanguageTypeUnknown; 577 bool is_complete_objc_class = false; 578 size_t calling_convention 579 = llvm::dwarf::CallingConvention::DW_CC_normal; 580 581 // bool struct_is_class = false; 582 const size_t num_attributes = die.GetAttributes(attributes); 583 if (num_attributes > 0) { 584 uint32_t i; 585 for (i = 0; i < num_attributes; ++i) { 586 attr = attributes.AttributeAtIndex(i); 587 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 588 switch (attr) { 589 case DW_AT_decl_file: 590 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) { 591 // llvm-gcc outputs invalid DW_AT_decl_file attributes that 592 // always 593 // point to the compile unit file, so we clear this invalid 594 // value 595 // so that we can still unique types efficiently. 596 decl.SetFile(FileSpec("<invalid>", false)); 597 } else 598 decl.SetFile( 599 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 600 form_value.Unsigned())); 601 break; 602 603 case DW_AT_decl_line: 604 decl.SetLine(form_value.Unsigned()); 605 break; 606 607 case DW_AT_decl_column: 608 decl.SetColumn(form_value.Unsigned()); 609 break; 610 611 case DW_AT_name: 612 type_name_cstr = form_value.AsCString(); 613 type_name_const_str.SetCString(type_name_cstr); 614 break; 615 616 case DW_AT_byte_size: 617 byte_size = form_value.Unsigned(); 618 byte_size_valid = true; 619 break; 620 621 case DW_AT_accessibility: 622 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 623 break; 624 625 case DW_AT_declaration: 626 is_forward_declaration = form_value.Boolean(); 627 break; 628 629 case DW_AT_APPLE_runtime_class: 630 class_language = (LanguageType)form_value.Signed(); 631 break; 632 633 case DW_AT_APPLE_objc_complete_type: 634 is_complete_objc_class = form_value.Signed(); 635 break; 636 case DW_AT_calling_convention: 637 calling_convention = form_value.Unsigned(); 638 break; 639 640 case DW_AT_allocated: 641 case DW_AT_associated: 642 case DW_AT_data_location: 643 case DW_AT_description: 644 case DW_AT_start_scope: 645 case DW_AT_visibility: 646 default: 647 case DW_AT_sibling: 648 break; 649 } 650 } 651 } 652 } 653 654 // UniqueDWARFASTType is large, so don't create a local variables on the 655 // stack, put it on the heap. This function is often called recursively 656 // and clang isn't good and sharing the stack space for variables in 657 // different blocks. 658 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 659 new UniqueDWARFASTType()); 660 661 ConstString unique_typename(type_name_const_str); 662 Declaration unique_decl(decl); 663 664 if (type_name_const_str) { 665 LanguageType die_language = die.GetLanguage(); 666 if (Language::LanguageIsCPlusPlus(die_language)) { 667 // For C++, we rely solely upon the one definition rule that says 668 // only 669 // one thing can exist at a given decl context. We ignore the file 670 // and 671 // line that things are declared on. 672 std::string qualified_name; 673 if (die.GetQualifiedName(qualified_name)) 674 unique_typename = ConstString(qualified_name); 675 unique_decl.Clear(); 676 } 677 678 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 679 unique_typename, die, unique_decl, 680 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 681 type_sp = unique_ast_entry_ap->m_type_sp; 682 if (type_sp) { 683 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 684 return type_sp; 685 } 686 } 687 } 688 689 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 690 DW_TAG_value_to_name(tag), type_name_cstr); 691 692 int tag_decl_kind = -1; 693 AccessType default_accessibility = eAccessNone; 694 if (tag == DW_TAG_structure_type) { 695 tag_decl_kind = clang::TTK_Struct; 696 default_accessibility = eAccessPublic; 697 } else if (tag == DW_TAG_union_type) { 698 tag_decl_kind = clang::TTK_Union; 699 default_accessibility = eAccessPublic; 700 } else if (tag == DW_TAG_class_type) { 701 tag_decl_kind = clang::TTK_Class; 702 default_accessibility = eAccessPrivate; 703 } 704 705 if (byte_size_valid && byte_size == 0 && type_name_cstr && 706 die.HasChildren() == false && 707 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 708 // Work around an issue with clang at the moment where 709 // forward declarations for objective C classes are emitted 710 // as: 711 // DW_TAG_structure_type [2] 712 // DW_AT_name( "ForwardObjcClass" ) 713 // DW_AT_byte_size( 0x00 ) 714 // DW_AT_decl_file( "..." ) 715 // DW_AT_decl_line( 1 ) 716 // 717 // Note that there is no DW_AT_declaration and there are 718 // no children, and the byte size is zero. 719 is_forward_declaration = true; 720 } 721 722 if (class_language == eLanguageTypeObjC || 723 class_language == eLanguageTypeObjC_plus_plus) { 724 if (!is_complete_objc_class && 725 die.Supports_DW_AT_APPLE_objc_complete_type()) { 726 // We have a valid eSymbolTypeObjCClass class symbol whose 727 // name matches the current objective C class that we 728 // are trying to find and this DIE isn't the complete 729 // definition (we checked is_complete_objc_class above and 730 // know it is false), so the real definition is in here somewhere 731 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 732 die, type_name_const_str, true); 733 734 if (!type_sp) { 735 SymbolFileDWARFDebugMap *debug_map_symfile = 736 dwarf->GetDebugMapSymfile(); 737 if (debug_map_symfile) { 738 // We weren't able to find a full declaration in 739 // this DWARF, see if we have a declaration anywhere 740 // else... 741 type_sp = 742 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 743 die, type_name_const_str, true); 744 } 745 } 746 747 if (type_sp) { 748 if (log) { 749 dwarf->GetObjectFile()->GetModule()->LogMessage( 750 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 751 "incomplete objc type, complete type is 0x%8.8" PRIx64, 752 static_cast<void *>(this), die.GetOffset(), 753 DW_TAG_value_to_name(tag), type_name_cstr, 754 type_sp->GetID()); 755 } 756 757 // We found a real definition for this type elsewhere 758 // so lets use it and cache the fact that we found 759 // a complete type for this die 760 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 761 return type_sp; 762 } 763 } 764 } 765 766 if (is_forward_declaration) { 767 // We have a forward declaration to a type and we need 768 // to try and find a full declaration. We look in the 769 // current type index just in case we have a forward 770 // declaration followed by an actual declarations in the 771 // DWARF. If this fails, we need to look elsewhere... 772 if (log) { 773 dwarf->GetObjectFile()->GetModule()->LogMessage( 774 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 775 "forward declaration, trying to find complete type", 776 static_cast<void *>(this), die.GetOffset(), 777 DW_TAG_value_to_name(tag), type_name_cstr); 778 } 779 780 // See if the type comes from a DWO module and if so, track down that 781 // type. 782 type_sp = ParseTypeFromDWO(die, log); 783 if (type_sp) 784 return type_sp; 785 786 DWARFDeclContext die_decl_ctx; 787 die.GetDWARFDeclContext(die_decl_ctx); 788 789 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 790 // type_name_const_str); 791 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 792 793 if (!type_sp) { 794 SymbolFileDWARFDebugMap *debug_map_symfile = 795 dwarf->GetDebugMapSymfile(); 796 if (debug_map_symfile) { 797 // We weren't able to find a full declaration in 798 // this DWARF, see if we have a declaration anywhere 799 // else... 800 type_sp = 801 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 802 die_decl_ctx); 803 } 804 } 805 806 if (type_sp) { 807 if (log) { 808 dwarf->GetObjectFile()->GetModule()->LogMessage( 809 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 810 "forward declaration, complete type is 0x%8.8" PRIx64, 811 static_cast<void *>(this), die.GetOffset(), 812 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 813 } 814 815 // We found a real definition for this type elsewhere 816 // so lets use it and cache the fact that we found 817 // a complete type for this die 818 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 819 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 820 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 821 if (defn_decl_ctx) 822 LinkDeclContextToDIE(defn_decl_ctx, die); 823 return type_sp; 824 } 825 } 826 assert(tag_decl_kind != -1); 827 bool clang_type_was_created = false; 828 clang_type.SetCompilerType( 829 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 830 if (!clang_type) { 831 clang::DeclContext *decl_ctx = 832 GetClangDeclContextContainingDIE(die, nullptr); 833 834 // If your decl context is a record that was imported from 835 // another AST context (in the gmodules case), we need to 836 // make sure the type backing the Decl is complete before 837 // adding children to it. This is not an issue in the 838 // non-gmodules case because the debug info will always contain 839 // a full definition of parent types in that case. 840 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die, 841 type_name_cstr); 842 843 if (accessibility == eAccessNone && decl_ctx) { 844 // Check the decl context that contains this class/struct/union. 845 // If it is a class we must give it an accessibility. 846 const clang::Decl::Kind containing_decl_kind = 847 decl_ctx->getDeclKind(); 848 if (DeclKindIsCXXClass(containing_decl_kind)) 849 accessibility = default_accessibility; 850 } 851 852 ClangASTMetadata metadata; 853 metadata.SetUserID(die.GetID()); 854 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 855 856 if (type_name_cstr && strchr(type_name_cstr, '<')) { 857 ClangASTContext::TemplateParameterInfos template_param_infos; 858 if (ParseTemplateParameterInfos(die, template_param_infos)) { 859 clang::ClassTemplateDecl *class_template_decl = 860 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 861 type_name_cstr, tag_decl_kind, 862 template_param_infos); 863 if (!class_template_decl) { 864 if (log) { 865 dwarf->GetObjectFile()->GetModule()->LogMessage( 866 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 867 "clang::ClassTemplateDecl failed to return a decl.", 868 static_cast<void *>(this), die.GetOffset(), 869 DW_TAG_value_to_name(tag), type_name_cstr); 870 } 871 return TypeSP(); 872 } 873 874 clang::ClassTemplateSpecializationDecl 875 *class_specialization_decl = 876 m_ast.CreateClassTemplateSpecializationDecl( 877 decl_ctx, class_template_decl, tag_decl_kind, 878 template_param_infos); 879 clang_type = m_ast.CreateClassTemplateSpecializationType( 880 class_specialization_decl); 881 clang_type_was_created = true; 882 883 m_ast.SetMetadata(class_template_decl, metadata); 884 m_ast.SetMetadata(class_specialization_decl, metadata); 885 } 886 } 887 888 if (!clang_type_was_created) { 889 clang_type_was_created = true; 890 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 891 type_name_cstr, tag_decl_kind, 892 class_language, &metadata); 893 } 894 } 895 896 // Store a forward declaration to this class type in case any 897 // parameters in any class methods need it for the clang 898 // types for function prototypes. 899 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 900 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 901 byte_size, NULL, LLDB_INVALID_UID, 902 Type::eEncodingIsUID, &decl, clang_type, 903 Type::eResolveStateForward)); 904 905 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 906 907 // Add our type to the unique type map so we don't 908 // end up creating many copies of the same type over 909 // and over in the ASTContext for our module 910 unique_ast_entry_ap->m_type_sp = type_sp; 911 unique_ast_entry_ap->m_die = die; 912 unique_ast_entry_ap->m_declaration = unique_decl; 913 unique_ast_entry_ap->m_byte_size = byte_size; 914 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 915 *unique_ast_entry_ap); 916 917 if (is_forward_declaration && die.HasChildren()) { 918 // Check to see if the DIE actually has a definition, some version of 919 // GCC will 920 // emit DIEs with DW_AT_declaration set to true, but yet still have 921 // subprogram, 922 // members, or inheritance, so we can't trust it 923 DWARFDIE child_die = die.GetFirstChild(); 924 while (child_die) { 925 switch (child_die.Tag()) { 926 case DW_TAG_inheritance: 927 case DW_TAG_subprogram: 928 case DW_TAG_member: 929 case DW_TAG_APPLE_property: 930 case DW_TAG_class_type: 931 case DW_TAG_structure_type: 932 case DW_TAG_enumeration_type: 933 case DW_TAG_typedef: 934 case DW_TAG_union_type: 935 child_die.Clear(); 936 is_forward_declaration = false; 937 break; 938 default: 939 child_die = child_die.GetSibling(); 940 break; 941 } 942 } 943 } 944 945 if (!is_forward_declaration) { 946 // Always start the definition for a class type so that 947 // if the class has child classes or types that require 948 // the class to be created for use as their decl contexts 949 // the class will be ready to accept these child definitions. 950 if (die.HasChildren() == false) { 951 // No children for this struct/union/class, lets finish it 952 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 953 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 954 } else { 955 dwarf->GetObjectFile()->GetModule()->ReportError( 956 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 957 "definition.\nPlease file a bug and attach the file at the " 958 "start of this error message", 959 die.GetOffset(), type_name_cstr); 960 } 961 962 if (tag == DW_TAG_structure_type) // this only applies in C 963 { 964 clang::RecordDecl *record_decl = 965 ClangASTContext::GetAsRecordDecl(clang_type); 966 967 if (record_decl) { 968 GetClangASTImporter().InsertRecordDecl( 969 record_decl, ClangASTImporter::LayoutInfo()); 970 } 971 } 972 } else if (clang_type_was_created) { 973 // Start the definition if the class is not objective C since 974 // the underlying decls respond to isCompleteDefinition(). Objective 975 // C decls don't respond to isCompleteDefinition() so we can't 976 // start the declaration definition right away. For C++ 977 // class/union/structs 978 // we want to start the definition in case the class is needed as 979 // the 980 // declaration context for a contained class or type without the 981 // need 982 // to complete that type.. 983 984 if (class_language != eLanguageTypeObjC && 985 class_language != eLanguageTypeObjC_plus_plus) 986 ClangASTContext::StartTagDeclarationDefinition(clang_type); 987 988 // Leave this as a forward declaration until we need 989 // to know the details of the type. lldb_private::Type 990 // will automatically call the SymbolFile virtual function 991 // "SymbolFileDWARF::CompleteType(Type *)" 992 // When the definition needs to be defined. 993 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 994 ClangUtil::RemoveFastQualifiers(clang_type) 995 .GetOpaqueQualType()) && 996 "Type already in the forward declaration map!"); 997 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 998 // it can be a 999 // SymbolFileDWARFDebugMap for Apple binaries. 1000 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1001 clang_type.GetOpaqueQualType(); 1002 dwarf->GetForwardDeclClangTypeToDie() 1003 [ClangUtil::RemoveFastQualifiers(clang_type) 1004 .GetOpaqueQualType()] = die.GetDIERef(); 1005 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1006 } 1007 } 1008 1009 // If we made a clang type, set the trivial abi if applicable: 1010 // We only do this for pass by value - which implies the Trivial ABI. 1011 // There isn't a way to assert that something that would normally be 1012 // pass by value is pass by reference, so we ignore that attribute if 1013 // set. 1014 if (calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1015 clang::CXXRecordDecl *record_decl = 1016 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1017 if (record_decl) { 1018 record_decl->setHasTrivialSpecialMemberForCall(); 1019 } 1020 } 1021 1022 } break; 1023 1024 case DW_TAG_enumeration_type: { 1025 // Set a bit that lets us know that we are currently parsing this 1026 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1027 1028 bool is_scoped = false; 1029 DWARFFormValue encoding_form; 1030 1031 const size_t num_attributes = die.GetAttributes(attributes); 1032 if (num_attributes > 0) { 1033 uint32_t i; 1034 1035 for (i = 0; i < num_attributes; ++i) { 1036 attr = attributes.AttributeAtIndex(i); 1037 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1038 switch (attr) { 1039 case DW_AT_decl_file: 1040 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1041 form_value.Unsigned())); 1042 break; 1043 case DW_AT_decl_line: 1044 decl.SetLine(form_value.Unsigned()); 1045 break; 1046 case DW_AT_decl_column: 1047 decl.SetColumn(form_value.Unsigned()); 1048 break; 1049 case DW_AT_name: 1050 type_name_cstr = form_value.AsCString(); 1051 type_name_const_str.SetCString(type_name_cstr); 1052 break; 1053 case DW_AT_type: 1054 encoding_form = form_value; 1055 break; 1056 case DW_AT_byte_size: 1057 byte_size = form_value.Unsigned(); 1058 break; 1059 case DW_AT_accessibility: 1060 break; // accessibility = 1061 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1062 case DW_AT_declaration: 1063 is_forward_declaration = form_value.Boolean(); 1064 break; 1065 case DW_AT_enum_class: 1066 is_scoped = form_value.Boolean(); 1067 break; 1068 case DW_AT_allocated: 1069 case DW_AT_associated: 1070 case DW_AT_bit_stride: 1071 case DW_AT_byte_stride: 1072 case DW_AT_data_location: 1073 case DW_AT_description: 1074 case DW_AT_start_scope: 1075 case DW_AT_visibility: 1076 case DW_AT_specification: 1077 case DW_AT_abstract_origin: 1078 case DW_AT_sibling: 1079 break; 1080 } 1081 } 1082 } 1083 1084 if (is_forward_declaration) { 1085 type_sp = ParseTypeFromDWO(die, log); 1086 if (type_sp) 1087 return type_sp; 1088 1089 DWARFDeclContext die_decl_ctx; 1090 die.GetDWARFDeclContext(die_decl_ctx); 1091 1092 type_sp = 1093 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1094 1095 if (!type_sp) { 1096 SymbolFileDWARFDebugMap *debug_map_symfile = 1097 dwarf->GetDebugMapSymfile(); 1098 if (debug_map_symfile) { 1099 // We weren't able to find a full declaration in 1100 // this DWARF, see if we have a declaration anywhere 1101 // else... 1102 type_sp = 1103 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1104 die_decl_ctx); 1105 } 1106 } 1107 1108 if (type_sp) { 1109 if (log) { 1110 dwarf->GetObjectFile()->GetModule()->LogMessage( 1111 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1112 "forward declaration, complete type is 0x%8.8" PRIx64, 1113 static_cast<void *>(this), die.GetOffset(), 1114 DW_TAG_value_to_name(tag), type_name_cstr, 1115 type_sp->GetID()); 1116 } 1117 1118 // We found a real definition for this type elsewhere 1119 // so lets use it and cache the fact that we found 1120 // a complete type for this die 1121 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1122 clang::DeclContext *defn_decl_ctx = 1123 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1124 DIERef(type_sp->GetID(), dwarf))); 1125 if (defn_decl_ctx) 1126 LinkDeclContextToDIE(defn_decl_ctx, die); 1127 return type_sp; 1128 } 1129 } 1130 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1131 DW_TAG_value_to_name(tag), type_name_cstr); 1132 1133 CompilerType enumerator_clang_type; 1134 clang_type.SetCompilerType( 1135 &m_ast, 1136 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1137 if (!clang_type) { 1138 if (encoding_form.IsValid()) { 1139 Type *enumerator_type = 1140 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1141 if (enumerator_type) 1142 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1143 } 1144 1145 if (!enumerator_clang_type) { 1146 if (byte_size > 0) { 1147 enumerator_clang_type = 1148 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1149 NULL, DW_ATE_signed, byte_size * 8); 1150 } else { 1151 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1152 } 1153 } 1154 1155 clang_type = m_ast.CreateEnumerationType( 1156 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1157 decl, enumerator_clang_type, is_scoped); 1158 } else { 1159 enumerator_clang_type = 1160 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1161 } 1162 1163 LinkDeclContextToDIE( 1164 ClangASTContext::GetDeclContextForType(clang_type), die); 1165 1166 type_sp.reset(new Type( 1167 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1168 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1169 clang_type, Type::eResolveStateForward)); 1170 1171 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1172 if (die.HasChildren()) { 1173 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1174 bool is_signed = false; 1175 enumerator_clang_type.IsIntegerType(is_signed); 1176 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1177 type_sp->GetByteSize(), die); 1178 } 1179 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1180 } else { 1181 dwarf->GetObjectFile()->GetModule()->ReportError( 1182 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1183 "definition.\nPlease file a bug and attach the file at the " 1184 "start of this error message", 1185 die.GetOffset(), type_name_cstr); 1186 } 1187 } 1188 } break; 1189 1190 case DW_TAG_inlined_subroutine: 1191 case DW_TAG_subprogram: 1192 case DW_TAG_subroutine_type: { 1193 // Set a bit that lets us know that we are currently parsing this 1194 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1195 1196 DWARFFormValue type_die_form; 1197 bool is_variadic = false; 1198 bool is_inline = false; 1199 bool is_static = false; 1200 bool is_virtual = false; 1201 bool is_explicit = false; 1202 bool is_artificial = false; 1203 bool has_template_params = false; 1204 DWARFFormValue specification_die_form; 1205 DWARFFormValue abstract_origin_die_form; 1206 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1207 1208 unsigned type_quals = 0; 1209 clang::StorageClass storage = 1210 clang::SC_None; //, Extern, Static, PrivateExtern 1211 1212 const size_t num_attributes = die.GetAttributes(attributes); 1213 if (num_attributes > 0) { 1214 uint32_t i; 1215 for (i = 0; i < num_attributes; ++i) { 1216 attr = attributes.AttributeAtIndex(i); 1217 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1218 switch (attr) { 1219 case DW_AT_decl_file: 1220 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1221 form_value.Unsigned())); 1222 break; 1223 case DW_AT_decl_line: 1224 decl.SetLine(form_value.Unsigned()); 1225 break; 1226 case DW_AT_decl_column: 1227 decl.SetColumn(form_value.Unsigned()); 1228 break; 1229 case DW_AT_name: 1230 type_name_cstr = form_value.AsCString(); 1231 type_name_const_str.SetCString(type_name_cstr); 1232 break; 1233 1234 case DW_AT_linkage_name: 1235 case DW_AT_MIPS_linkage_name: 1236 mangled_name_cstr = form_value.AsCString(); 1237 break; 1238 case DW_AT_type: 1239 type_die_form = form_value; 1240 break; 1241 case DW_AT_accessibility: 1242 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1243 break; 1244 case DW_AT_declaration: 1245 break; // is_forward_declaration = form_value.Boolean(); break; 1246 case DW_AT_inline: 1247 is_inline = form_value.Boolean(); 1248 break; 1249 case DW_AT_virtuality: 1250 is_virtual = form_value.Boolean(); 1251 break; 1252 case DW_AT_explicit: 1253 is_explicit = form_value.Boolean(); 1254 break; 1255 case DW_AT_artificial: 1256 is_artificial = form_value.Boolean(); 1257 break; 1258 1259 case DW_AT_external: 1260 if (form_value.Unsigned()) { 1261 if (storage == clang::SC_None) 1262 storage = clang::SC_Extern; 1263 else 1264 storage = clang::SC_PrivateExtern; 1265 } 1266 break; 1267 1268 case DW_AT_specification: 1269 specification_die_form = form_value; 1270 break; 1271 1272 case DW_AT_abstract_origin: 1273 abstract_origin_die_form = form_value; 1274 break; 1275 1276 case DW_AT_object_pointer: 1277 object_pointer_die_offset = form_value.Reference(); 1278 break; 1279 1280 case DW_AT_allocated: 1281 case DW_AT_associated: 1282 case DW_AT_address_class: 1283 case DW_AT_calling_convention: 1284 case DW_AT_data_location: 1285 case DW_AT_elemental: 1286 case DW_AT_entry_pc: 1287 case DW_AT_frame_base: 1288 case DW_AT_high_pc: 1289 case DW_AT_low_pc: 1290 case DW_AT_prototyped: 1291 case DW_AT_pure: 1292 case DW_AT_ranges: 1293 case DW_AT_recursive: 1294 case DW_AT_return_addr: 1295 case DW_AT_segment: 1296 case DW_AT_start_scope: 1297 case DW_AT_static_link: 1298 case DW_AT_trampoline: 1299 case DW_AT_visibility: 1300 case DW_AT_vtable_elem_location: 1301 case DW_AT_description: 1302 case DW_AT_sibling: 1303 break; 1304 } 1305 } 1306 } 1307 } 1308 1309 std::string object_pointer_name; 1310 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1311 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1312 if (object_pointer_die) { 1313 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1314 if (object_pointer_name_cstr) 1315 object_pointer_name = object_pointer_name_cstr; 1316 } 1317 } 1318 1319 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1320 DW_TAG_value_to_name(tag), type_name_cstr); 1321 1322 CompilerType return_clang_type; 1323 Type *func_type = NULL; 1324 1325 if (type_die_form.IsValid()) 1326 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1327 1328 if (func_type) 1329 return_clang_type = func_type->GetForwardCompilerType(); 1330 else 1331 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1332 1333 std::vector<CompilerType> function_param_types; 1334 std::vector<clang::ParmVarDecl *> function_param_decls; 1335 1336 // Parse the function children for the parameters 1337 1338 DWARFDIE decl_ctx_die; 1339 clang::DeclContext *containing_decl_ctx = 1340 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1341 const clang::Decl::Kind containing_decl_kind = 1342 containing_decl_ctx->getDeclKind(); 1343 1344 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1345 // Start off static. This will be set to false in 1346 // ParseChildParameters(...) 1347 // if we find a "this" parameters as the first parameter 1348 if (is_cxx_method) { 1349 is_static = true; 1350 } 1351 1352 if (die.HasChildren()) { 1353 bool skip_artificial = true; 1354 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1355 is_static, is_variadic, has_template_params, 1356 function_param_types, function_param_decls, 1357 type_quals); 1358 } 1359 1360 bool ignore_containing_context = false; 1361 // Check for templatized class member functions. If we had any 1362 // DW_TAG_template_type_parameter 1363 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1364 // can't let this become 1365 // a method in a class. Why? Because templatized functions are only 1366 // emitted if one of the 1367 // templatized methods is used in the current compile unit and we will 1368 // end up with classes 1369 // that may or may not include these member functions and this means one 1370 // class won't match another 1371 // class definition and it affects our ability to use a class in the 1372 // clang expression parser. So 1373 // for the greater good, we currently must not allow any template member 1374 // functions in a class definition. 1375 if (is_cxx_method && has_template_params) { 1376 ignore_containing_context = true; 1377 is_cxx_method = false; 1378 } 1379 1380 // clang_type will get the function prototype clang type after this call 1381 clang_type = m_ast.CreateFunctionType( 1382 return_clang_type, function_param_types.data(), 1383 function_param_types.size(), is_variadic, type_quals); 1384 1385 if (type_name_cstr) { 1386 bool type_handled = false; 1387 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1388 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1389 if (objc_method.IsValid(true)) { 1390 CompilerType class_opaque_type; 1391 ConstString class_name(objc_method.GetClassName()); 1392 if (class_name) { 1393 TypeSP complete_objc_class_type_sp( 1394 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1395 DWARFDIE(), class_name, false)); 1396 1397 if (complete_objc_class_type_sp) { 1398 CompilerType type_clang_forward_type = 1399 complete_objc_class_type_sp->GetForwardCompilerType(); 1400 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1401 type_clang_forward_type)) 1402 class_opaque_type = type_clang_forward_type; 1403 } 1404 } 1405 1406 if (class_opaque_type) { 1407 // If accessibility isn't set to anything valid, assume public 1408 // for 1409 // now... 1410 if (accessibility == eAccessNone) 1411 accessibility = eAccessPublic; 1412 1413 clang::ObjCMethodDecl *objc_method_decl = 1414 m_ast.AddMethodToObjCObjectType( 1415 class_opaque_type, type_name_cstr, clang_type, 1416 accessibility, is_artificial, is_variadic); 1417 type_handled = objc_method_decl != NULL; 1418 if (type_handled) { 1419 LinkDeclContextToDIE( 1420 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1421 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1422 } else { 1423 dwarf->GetObjectFile()->GetModule()->ReportError( 1424 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1425 "please file a bug and attach the file at the start of " 1426 "this error message", 1427 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1428 } 1429 } 1430 } else if (is_cxx_method) { 1431 // Look at the parent of this DIE and see if is is 1432 // a class or struct and see if this is actually a 1433 // C++ method 1434 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1435 if (class_type) { 1436 bool alternate_defn = false; 1437 if (class_type->GetID() != decl_ctx_die.GetID() || 1438 decl_ctx_die.GetContainingDWOModuleDIE()) { 1439 alternate_defn = true; 1440 1441 // We uniqued the parent class of this function to another 1442 // class 1443 // so we now need to associate all dies under "decl_ctx_die" 1444 // to 1445 // DIEs in the DIE for "class_type"... 1446 SymbolFileDWARF *class_symfile = NULL; 1447 DWARFDIE class_type_die; 1448 1449 SymbolFileDWARFDebugMap *debug_map_symfile = 1450 dwarf->GetDebugMapSymfile(); 1451 if (debug_map_symfile) { 1452 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1453 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1454 class_type->GetID())); 1455 class_type_die = class_symfile->DebugInfo()->GetDIE( 1456 DIERef(class_type->GetID(), dwarf)); 1457 } else { 1458 class_symfile = dwarf; 1459 class_type_die = dwarf->DebugInfo()->GetDIE( 1460 DIERef(class_type->GetID(), dwarf)); 1461 } 1462 if (class_type_die) { 1463 DWARFDIECollection failures; 1464 1465 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1466 class_type, failures); 1467 1468 // FIXME do something with these failures that's smarter 1469 // than 1470 // just dropping them on the ground. Unfortunately classes 1471 // don't 1472 // like having stuff added to them after their definitions 1473 // are 1474 // complete... 1475 1476 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1477 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1478 type_sp = type_ptr->shared_from_this(); 1479 break; 1480 } 1481 } 1482 } 1483 1484 if (specification_die_form.IsValid()) { 1485 // We have a specification which we are going to base our 1486 // function 1487 // prototype off of, so we need this type to be completed so 1488 // that the 1489 // m_die_to_decl_ctx for the method in the specification has a 1490 // valid 1491 // clang decl context. 1492 class_type->GetForwardCompilerType(); 1493 // If we have a specification, then the function type should 1494 // have been 1495 // made with the specification and not with this die. 1496 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1497 DIERef(specification_die_form)); 1498 clang::DeclContext *spec_clang_decl_ctx = 1499 GetClangDeclContextForDIE(spec_die); 1500 if (spec_clang_decl_ctx) { 1501 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1502 } else { 1503 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1504 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1505 ") has no decl\n", 1506 die.GetID(), specification_die_form.Reference()); 1507 } 1508 type_handled = true; 1509 } else if (abstract_origin_die_form.IsValid()) { 1510 // We have a specification which we are going to base our 1511 // function 1512 // prototype off of, so we need this type to be completed so 1513 // that the 1514 // m_die_to_decl_ctx for the method in the abstract origin has 1515 // a valid 1516 // clang decl context. 1517 class_type->GetForwardCompilerType(); 1518 1519 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1520 DIERef(abstract_origin_die_form)); 1521 clang::DeclContext *abs_clang_decl_ctx = 1522 GetClangDeclContextForDIE(abs_die); 1523 if (abs_clang_decl_ctx) { 1524 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1525 } else { 1526 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1527 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1528 ") has no decl\n", 1529 die.GetID(), abstract_origin_die_form.Reference()); 1530 } 1531 type_handled = true; 1532 } else { 1533 CompilerType class_opaque_type = 1534 class_type->GetForwardCompilerType(); 1535 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1536 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1537 if (!is_static && !die.HasChildren()) { 1538 // We have a C++ member function with no children (this 1539 // pointer!) 1540 // and clang will get mad if we try and make a function 1541 // that isn't 1542 // well formed in the DWARF, so we will just skip it... 1543 type_handled = true; 1544 } else { 1545 bool add_method = true; 1546 if (alternate_defn) { 1547 // If an alternate definition for the class exists, 1548 // then add the method only if an 1549 // equivalent is not already present. 1550 clang::CXXRecordDecl *record_decl = 1551 m_ast.GetAsCXXRecordDecl( 1552 class_opaque_type.GetOpaqueQualType()); 1553 if (record_decl) { 1554 for (auto method_iter = record_decl->method_begin(); 1555 method_iter != record_decl->method_end(); 1556 method_iter++) { 1557 clang::CXXMethodDecl *method_decl = *method_iter; 1558 if (method_decl->getNameInfo().getAsString() == 1559 std::string(type_name_cstr)) { 1560 if (method_decl->getType() == 1561 ClangUtil::GetQualType(clang_type)) { 1562 add_method = false; 1563 LinkDeclContextToDIE( 1564 ClangASTContext::GetAsDeclContext( 1565 method_decl), 1566 die); 1567 type_handled = true; 1568 1569 break; 1570 } 1571 } 1572 } 1573 } 1574 } 1575 1576 if (add_method) { 1577 llvm::PrettyStackTraceFormat stack_trace( 1578 "SymbolFileDWARF::ParseType() is adding a method " 1579 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1580 type_name_cstr, 1581 class_type->GetName().GetCString(), die.GetID(), 1582 dwarf->GetObjectFile() 1583 ->GetFileSpec() 1584 .GetPath() 1585 .c_str()); 1586 1587 const bool is_attr_used = false; 1588 // Neither GCC 4.2 nor clang++ currently set a valid 1589 // accessibility 1590 // in the DWARF for C++ methods... Default to public 1591 // for now... 1592 if (accessibility == eAccessNone) 1593 accessibility = eAccessPublic; 1594 1595 clang::CXXMethodDecl *cxx_method_decl = 1596 m_ast.AddMethodToCXXRecordType( 1597 class_opaque_type.GetOpaqueQualType(), 1598 type_name_cstr, mangled_name_cstr, clang_type, 1599 accessibility, is_virtual, is_static, 1600 is_inline, is_explicit, is_attr_used, 1601 is_artificial); 1602 1603 type_handled = cxx_method_decl != NULL; 1604 1605 if (type_handled) { 1606 LinkDeclContextToDIE( 1607 ClangASTContext::GetAsDeclContext( 1608 cxx_method_decl), 1609 die); 1610 1611 ClangASTMetadata metadata; 1612 metadata.SetUserID(die.GetID()); 1613 1614 if (!object_pointer_name.empty()) { 1615 metadata.SetObjectPtrName( 1616 object_pointer_name.c_str()); 1617 if (log) 1618 log->Printf( 1619 "Setting object pointer name: %s on method " 1620 "object %p.\n", 1621 object_pointer_name.c_str(), 1622 static_cast<void *>(cxx_method_decl)); 1623 } 1624 m_ast.SetMetadata(cxx_method_decl, metadata); 1625 } else { 1626 ignore_containing_context = true; 1627 } 1628 } 1629 } 1630 } else { 1631 // We were asked to parse the type for a method in a 1632 // class, yet the 1633 // class hasn't been asked to complete itself through the 1634 // clang::ExternalASTSource protocol, so we need to just 1635 // have the 1636 // class complete itself and do things the right way, then 1637 // our 1638 // DIE should then have an entry in the 1639 // dwarf->GetDIEToType() map. First 1640 // we need to modify the dwarf->GetDIEToType() so it 1641 // doesn't think we are 1642 // trying to parse this DIE anymore... 1643 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1644 1645 // Now we get the full type to force our class type to 1646 // complete itself 1647 // using the clang::ExternalASTSource protocol which will 1648 // parse all 1649 // base classes and all methods (including the method for 1650 // this DIE). 1651 class_type->GetFullCompilerType(); 1652 1653 // The type for this DIE should have been filled in the 1654 // function call above 1655 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1656 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1657 type_sp = type_ptr->shared_from_this(); 1658 break; 1659 } 1660 1661 // FIXME This is fixing some even uglier behavior but we 1662 // really need to 1663 // uniq the methods of each class as well as the class 1664 // itself. 1665 // <rdar://problem/11240464> 1666 type_handled = true; 1667 } 1668 } 1669 } 1670 } 1671 } 1672 } 1673 1674 if (!type_handled) { 1675 clang::FunctionDecl *function_decl = nullptr; 1676 1677 if (abstract_origin_die_form.IsValid()) { 1678 DWARFDIE abs_die = 1679 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1680 1681 SymbolContext sc; 1682 1683 if (dwarf->ResolveType(abs_die)) { 1684 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1685 GetCachedClangDeclContextForDIE(abs_die)); 1686 1687 if (function_decl) { 1688 LinkDeclContextToDIE(function_decl, die); 1689 } 1690 } 1691 } 1692 1693 if (!function_decl) { 1694 // We just have a function that isn't part of a class 1695 function_decl = m_ast.CreateFunctionDeclaration( 1696 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1697 : containing_decl_ctx, 1698 type_name_cstr, clang_type, storage, is_inline); 1699 1700 if (has_template_params) { 1701 ClangASTContext::TemplateParameterInfos template_param_infos; 1702 ParseTemplateParameterInfos(die, template_param_infos); 1703 clang::FunctionTemplateDecl *func_template_decl = 1704 m_ast.CreateFunctionTemplateDecl( 1705 containing_decl_ctx, function_decl, type_name_cstr, 1706 template_param_infos); 1707 m_ast.CreateFunctionTemplateSpecializationInfo( 1708 function_decl, func_template_decl, template_param_infos); 1709 } 1710 1711 lldbassert(function_decl); 1712 1713 if (function_decl) { 1714 LinkDeclContextToDIE(function_decl, die); 1715 1716 if (!function_param_decls.empty()) 1717 m_ast.SetFunctionParameters(function_decl, 1718 &function_param_decls.front(), 1719 function_param_decls.size()); 1720 1721 ClangASTMetadata metadata; 1722 metadata.SetUserID(die.GetID()); 1723 1724 if (!object_pointer_name.empty()) { 1725 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1726 if (log) 1727 log->Printf("Setting object pointer name: %s on function " 1728 "object %p.", 1729 object_pointer_name.c_str(), 1730 static_cast<void *>(function_decl)); 1731 } 1732 m_ast.SetMetadata(function_decl, metadata); 1733 } 1734 } 1735 } 1736 } 1737 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1738 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1739 clang_type, Type::eResolveStateFull)); 1740 assert(type_sp.get()); 1741 } break; 1742 1743 case DW_TAG_array_type: { 1744 // Set a bit that lets us know that we are currently parsing this 1745 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1746 1747 DWARFFormValue type_die_form; 1748 int64_t first_index = 0; 1749 uint32_t byte_stride = 0; 1750 uint32_t bit_stride = 0; 1751 bool is_vector = false; 1752 const size_t num_attributes = die.GetAttributes(attributes); 1753 1754 if (num_attributes > 0) { 1755 uint32_t i; 1756 for (i = 0; i < num_attributes; ++i) { 1757 attr = attributes.AttributeAtIndex(i); 1758 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1759 switch (attr) { 1760 case DW_AT_decl_file: 1761 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1762 form_value.Unsigned())); 1763 break; 1764 case DW_AT_decl_line: 1765 decl.SetLine(form_value.Unsigned()); 1766 break; 1767 case DW_AT_decl_column: 1768 decl.SetColumn(form_value.Unsigned()); 1769 break; 1770 case DW_AT_name: 1771 type_name_cstr = form_value.AsCString(); 1772 type_name_const_str.SetCString(type_name_cstr); 1773 break; 1774 1775 case DW_AT_type: 1776 type_die_form = form_value; 1777 break; 1778 case DW_AT_byte_size: 1779 break; // byte_size = form_value.Unsigned(); break; 1780 case DW_AT_byte_stride: 1781 byte_stride = form_value.Unsigned(); 1782 break; 1783 case DW_AT_bit_stride: 1784 bit_stride = form_value.Unsigned(); 1785 break; 1786 case DW_AT_GNU_vector: 1787 is_vector = form_value.Boolean(); 1788 break; 1789 case DW_AT_accessibility: 1790 break; // accessibility = 1791 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1792 case DW_AT_declaration: 1793 break; // is_forward_declaration = form_value.Boolean(); break; 1794 case DW_AT_allocated: 1795 case DW_AT_associated: 1796 case DW_AT_data_location: 1797 case DW_AT_description: 1798 case DW_AT_ordering: 1799 case DW_AT_start_scope: 1800 case DW_AT_visibility: 1801 case DW_AT_specification: 1802 case DW_AT_abstract_origin: 1803 case DW_AT_sibling: 1804 break; 1805 } 1806 } 1807 } 1808 1809 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1810 DW_TAG_value_to_name(tag), type_name_cstr); 1811 1812 DIERef type_die_ref(type_die_form); 1813 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1814 1815 if (element_type) { 1816 std::vector<uint64_t> element_orders; 1817 ParseChildArrayInfo(sc, die, first_index, element_orders, 1818 byte_stride, bit_stride); 1819 if (byte_stride == 0 && bit_stride == 0) 1820 byte_stride = element_type->GetByteSize(); 1821 CompilerType array_element_type = 1822 element_type->GetForwardCompilerType(); 1823 1824 if (ClangASTContext::IsCXXClassType(array_element_type) && 1825 array_element_type.GetCompleteType() == false) { 1826 ModuleSP module_sp = die.GetModule(); 1827 if (module_sp) { 1828 if (die.GetCU()->GetProducer() == eProducerClang) 1829 module_sp->ReportError( 1830 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1831 "class/union/struct element type DIE 0x%8.8x that is a " 1832 "forward declaration, not a complete definition.\nTry " 1833 "compiling the source file with -fstandalone-debug or " 1834 "disable -gmodules", 1835 die.GetOffset(), type_die_ref.die_offset); 1836 else 1837 module_sp->ReportError( 1838 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1839 "class/union/struct element type DIE 0x%8.8x that is a " 1840 "forward declaration, not a complete definition.\nPlease " 1841 "file a bug against the compiler and include the " 1842 "preprocessed output for %s", 1843 die.GetOffset(), type_die_ref.die_offset, 1844 die.GetLLDBCompileUnit() 1845 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1846 : "the source file"); 1847 } 1848 1849 // We have no choice other than to pretend that the element class 1850 // type 1851 // is complete. If we don't do this, clang will crash when trying 1852 // to layout the class. Since we provide layout assistance, all 1853 // ivars in this class and other classes will be fine, this is 1854 // the best we can do short of crashing. 1855 if (ClangASTContext::StartTagDeclarationDefinition( 1856 array_element_type)) { 1857 ClangASTContext::CompleteTagDeclarationDefinition( 1858 array_element_type); 1859 } else { 1860 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1861 "start its definition.\nPlease file a " 1862 "bug and attach the file at the start " 1863 "of this error message", 1864 type_die_ref.die_offset); 1865 } 1866 } 1867 1868 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1869 if (element_orders.size() > 0) { 1870 uint64_t num_elements = 0; 1871 std::vector<uint64_t>::const_reverse_iterator pos; 1872 std::vector<uint64_t>::const_reverse_iterator end = 1873 element_orders.rend(); 1874 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1875 num_elements = *pos; 1876 clang_type = m_ast.CreateArrayType(array_element_type, 1877 num_elements, is_vector); 1878 array_element_type = clang_type; 1879 array_element_bit_stride = 1880 num_elements ? array_element_bit_stride * num_elements 1881 : array_element_bit_stride; 1882 } 1883 } else { 1884 clang_type = 1885 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1886 } 1887 ConstString empty_name; 1888 type_sp.reset(new Type( 1889 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1890 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1891 &decl, clang_type, Type::eResolveStateFull)); 1892 type_sp->SetEncodingType(element_type); 1893 } 1894 } 1895 } break; 1896 1897 case DW_TAG_ptr_to_member_type: { 1898 DWARFFormValue type_die_form; 1899 DWARFFormValue containing_type_die_form; 1900 1901 const size_t num_attributes = die.GetAttributes(attributes); 1902 1903 if (num_attributes > 0) { 1904 uint32_t i; 1905 for (i = 0; i < num_attributes; ++i) { 1906 attr = attributes.AttributeAtIndex(i); 1907 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1908 switch (attr) { 1909 case DW_AT_type: 1910 type_die_form = form_value; 1911 break; 1912 case DW_AT_containing_type: 1913 containing_type_die_form = form_value; 1914 break; 1915 } 1916 } 1917 } 1918 1919 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1920 Type *class_type = 1921 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1922 1923 CompilerType pointee_clang_type = 1924 pointee_type->GetForwardCompilerType(); 1925 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1926 1927 clang_type = ClangASTContext::CreateMemberPointerType( 1928 class_clang_type, pointee_clang_type); 1929 1930 byte_size = clang_type.GetByteSize(nullptr); 1931 1932 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1933 byte_size, NULL, LLDB_INVALID_UID, 1934 Type::eEncodingIsUID, NULL, clang_type, 1935 Type::eResolveStateForward)); 1936 } 1937 1938 break; 1939 } 1940 default: 1941 dwarf->GetObjectFile()->GetModule()->ReportError( 1942 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1943 "attach the file at the start of this error message", 1944 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1945 break; 1946 } 1947 1948 if (type_sp.get()) { 1949 DWARFDIE sc_parent_die = 1950 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1951 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1952 1953 SymbolContextScope *symbol_context_scope = NULL; 1954 if (sc_parent_tag == DW_TAG_compile_unit) { 1955 symbol_context_scope = sc.comp_unit; 1956 } else if (sc.function != NULL && sc_parent_die) { 1957 symbol_context_scope = 1958 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1959 if (symbol_context_scope == NULL) 1960 symbol_context_scope = sc.function; 1961 } 1962 1963 if (symbol_context_scope != NULL) { 1964 type_sp->SetSymbolContextScope(symbol_context_scope); 1965 } 1966 1967 // We are ready to put this type into the uniqued list up at the module 1968 // level 1969 type_list->Insert(type_sp); 1970 1971 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1972 } 1973 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1974 type_sp = type_ptr->shared_from_this(); 1975 } 1976 } 1977 return type_sp; 1978 } 1979 1980 // DWARF parsing functions 1981 1982 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1983 public: 1984 DelayedAddObjCClassProperty( 1985 const CompilerType &class_opaque_type, const char *property_name, 1986 const CompilerType &property_opaque_type, // The property type is only 1987 // required if you don't have an 1988 // ivar decl 1989 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1990 const char *property_getter_name, uint32_t property_attributes, 1991 const ClangASTMetadata *metadata) 1992 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1993 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1994 m_property_setter_name(property_setter_name), 1995 m_property_getter_name(property_getter_name), 1996 m_property_attributes(property_attributes) { 1997 if (metadata != NULL) { 1998 m_metadata_ap.reset(new ClangASTMetadata()); 1999 *m_metadata_ap = *metadata; 2000 } 2001 } 2002 2003 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 2004 *this = rhs; 2005 } 2006 2007 DelayedAddObjCClassProperty & 2008 operator=(const DelayedAddObjCClassProperty &rhs) { 2009 m_class_opaque_type = rhs.m_class_opaque_type; 2010 m_property_name = rhs.m_property_name; 2011 m_property_opaque_type = rhs.m_property_opaque_type; 2012 m_ivar_decl = rhs.m_ivar_decl; 2013 m_property_setter_name = rhs.m_property_setter_name; 2014 m_property_getter_name = rhs.m_property_getter_name; 2015 m_property_attributes = rhs.m_property_attributes; 2016 2017 if (rhs.m_metadata_ap.get()) { 2018 m_metadata_ap.reset(new ClangASTMetadata()); 2019 *m_metadata_ap = *rhs.m_metadata_ap; 2020 } 2021 return *this; 2022 } 2023 2024 bool Finalize() { 2025 return ClangASTContext::AddObjCClassProperty( 2026 m_class_opaque_type, m_property_name, m_property_opaque_type, 2027 m_ivar_decl, m_property_setter_name, m_property_getter_name, 2028 m_property_attributes, m_metadata_ap.get()); 2029 } 2030 2031 private: 2032 CompilerType m_class_opaque_type; 2033 const char *m_property_name; 2034 CompilerType m_property_opaque_type; 2035 clang::ObjCIvarDecl *m_ivar_decl; 2036 const char *m_property_setter_name; 2037 const char *m_property_getter_name; 2038 uint32_t m_property_attributes; 2039 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 2040 }; 2041 2042 bool DWARFASTParserClang::ParseTemplateDIE( 2043 const DWARFDIE &die, 2044 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2045 const dw_tag_t tag = die.Tag(); 2046 bool is_template_template_argument = false; 2047 2048 switch (tag) { 2049 case DW_TAG_GNU_template_parameter_pack: { 2050 template_param_infos.packed_args.reset( 2051 new ClangASTContext::TemplateParameterInfos); 2052 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 2053 child_die = child_die.GetSibling()) { 2054 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 2055 return false; 2056 } 2057 if (const char *name = die.GetName()) { 2058 template_param_infos.pack_name = name; 2059 } 2060 return true; 2061 } 2062 case DW_TAG_GNU_template_template_param: 2063 is_template_template_argument = true; 2064 LLVM_FALLTHROUGH; 2065 case DW_TAG_template_type_parameter: 2066 case DW_TAG_template_value_parameter: { 2067 DWARFAttributes attributes; 2068 const size_t num_attributes = die.GetAttributes(attributes); 2069 const char *name = nullptr; 2070 const char *template_name = nullptr; 2071 CompilerType clang_type; 2072 uint64_t uval64 = 0; 2073 bool uval64_valid = false; 2074 if (num_attributes > 0) { 2075 DWARFFormValue form_value; 2076 for (size_t i = 0; i < num_attributes; ++i) { 2077 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2078 2079 switch (attr) { 2080 case DW_AT_name: 2081 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2082 name = form_value.AsCString(); 2083 break; 2084 2085 case DW_AT_GNU_template_name: 2086 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2087 template_name = form_value.AsCString(); 2088 break; 2089 2090 case DW_AT_type: 2091 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2092 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2093 if (lldb_type) 2094 clang_type = lldb_type->GetForwardCompilerType(); 2095 } 2096 break; 2097 2098 case DW_AT_const_value: 2099 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2100 uval64_valid = true; 2101 uval64 = form_value.Unsigned(); 2102 } 2103 break; 2104 default: 2105 break; 2106 } 2107 } 2108 2109 clang::ASTContext *ast = m_ast.getASTContext(); 2110 if (!clang_type) 2111 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2112 2113 if (!is_template_template_argument) { 2114 bool is_signed = false; 2115 if (name && name[0]) 2116 template_param_infos.names.push_back(name); 2117 else 2118 template_param_infos.names.push_back(NULL); 2119 2120 // Get the signed value for any integer or enumeration if available 2121 clang_type.IsIntegerOrEnumerationType(is_signed); 2122 2123 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2124 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2125 template_param_infos.args.push_back( 2126 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2127 ClangUtil::GetQualType(clang_type))); 2128 } else { 2129 template_param_infos.args.push_back( 2130 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2131 } 2132 } else { 2133 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2134 template_param_infos.names.push_back(name); 2135 template_param_infos.args.push_back( 2136 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2137 } 2138 } 2139 } 2140 return true; 2141 2142 default: 2143 break; 2144 } 2145 return false; 2146 } 2147 2148 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2149 const DWARFDIE &parent_die, 2150 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2151 2152 if (!parent_die) 2153 return false; 2154 2155 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2156 die = die.GetSibling()) { 2157 const dw_tag_t tag = die.Tag(); 2158 2159 switch (tag) { 2160 case DW_TAG_template_type_parameter: 2161 case DW_TAG_template_value_parameter: 2162 case DW_TAG_GNU_template_parameter_pack: 2163 case DW_TAG_GNU_template_template_param: 2164 ParseTemplateDIE(die, template_param_infos); 2165 break; 2166 2167 default: 2168 break; 2169 } 2170 } 2171 if (template_param_infos.args.empty()) 2172 return false; 2173 return template_param_infos.args.size() == template_param_infos.names.size(); 2174 } 2175 2176 // Checks whether m1 is an overload of m2 (as opposed to an override). 2177 // This is called by addOverridesForMethod to distinguish overrides (which share 2178 // a vtable entry) from overloads (which require distinct entries). 2179 static bool isOverload(clang::CXXMethodDecl *m1, clang::CXXMethodDecl *m2) { 2180 // FIXME: This should detect covariant return types, but currently doesn't. 2181 lldbassert(&m1->getASTContext() == &m2->getASTContext() && 2182 "Methods should have the same AST context"); 2183 clang::ASTContext &context = m1->getASTContext(); 2184 2185 const auto *m1Type = 2186 llvm::cast<clang::FunctionProtoType>( 2187 context.getCanonicalType(m1->getType())); 2188 2189 const auto *m2Type = 2190 llvm::cast<clang::FunctionProtoType>( 2191 context.getCanonicalType(m2->getType())); 2192 2193 auto compareArgTypes = 2194 [&context](const clang::QualType &m1p, const clang::QualType &m2p) { 2195 return context.hasSameType(m1p.getUnqualifiedType(), 2196 m2p.getUnqualifiedType()); 2197 }; 2198 2199 return !std::equal(m1Type->param_type_begin(), m1Type->param_type_end(), 2200 m2Type->param_type_begin(), compareArgTypes); 2201 } 2202 2203 // If decl is a virtual method, walk the base classes looking for methods that 2204 // decl overrides. This table of overridden methods is used by IRGen to determine 2205 // the vtable layout for decl's parent class. 2206 static void addOverridesForMethod(clang::CXXMethodDecl *decl) { 2207 if (!decl->isVirtual()) 2208 return; 2209 2210 clang::CXXBasePaths paths; 2211 2212 auto find_overridden_methods = 2213 [decl](const clang::CXXBaseSpecifier *specifier, clang::CXXBasePath &path) { 2214 if (auto *base_record = 2215 llvm::dyn_cast<clang::CXXRecordDecl>( 2216 specifier->getType()->getAs<clang::RecordType>()->getDecl())) { 2217 2218 clang::DeclarationName name = decl->getDeclName(); 2219 2220 // If this is a destructor, check whether the base class destructor is 2221 // virtual. 2222 if (name.getNameKind() == clang::DeclarationName::CXXDestructorName) 2223 if (auto *baseDtorDecl = base_record->getDestructor()) { 2224 if (baseDtorDecl->isVirtual()) { 2225 path.Decls = baseDtorDecl; 2226 return true; 2227 } else 2228 return false; 2229 } 2230 2231 // Otherwise, search for name in the base class. 2232 for (path.Decls = base_record->lookup(name); !path.Decls.empty(); 2233 path.Decls = path.Decls.slice(1)) { 2234 if (auto *method_decl = 2235 llvm::dyn_cast<clang::CXXMethodDecl>(path.Decls.front())) 2236 if (method_decl->isVirtual() && !isOverload(decl, method_decl)) { 2237 path.Decls = method_decl; 2238 return true; 2239 } 2240 } 2241 } 2242 2243 return false; 2244 }; 2245 2246 if (decl->getParent()->lookupInBases(find_overridden_methods, paths)) { 2247 for (auto *overridden_decl : paths.found_decls()) 2248 decl->addOverriddenMethod( 2249 llvm::cast<clang::CXXMethodDecl>(overridden_decl)); 2250 } 2251 } 2252 2253 // If clang_type is a CXXRecordDecl, builds the method override list for each 2254 // of its virtual methods. 2255 static void addMethodOverrides(ClangASTContext &ast, CompilerType &clang_type) { 2256 if (auto *record = 2257 ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType())) 2258 for (auto *method : record->methods()) 2259 addOverridesForMethod(method); 2260 } 2261 2262 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2263 lldb_private::Type *type, 2264 CompilerType &clang_type) { 2265 SymbolFileDWARF *dwarf = die.GetDWARF(); 2266 2267 std::lock_guard<std::recursive_mutex> guard( 2268 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2269 2270 // Disable external storage for this type so we don't get anymore 2271 // clang::ExternalASTSource queries for this type. 2272 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2273 2274 if (!die) 2275 return false; 2276 2277 #if defined LLDB_CONFIGURATION_DEBUG 2278 //---------------------------------------------------------------------- 2279 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2280 // environment variable can be set with one or more typenames separated 2281 // by ';' characters. This will cause this function to not complete any 2282 // types whose names match. 2283 // 2284 // Examples of setting this environment variable: 2285 // 2286 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2287 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2288 //---------------------------------------------------------------------- 2289 const char *dont_complete_typenames_cstr = 2290 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2291 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2292 const char *die_name = die.GetName(); 2293 if (die_name && die_name[0]) { 2294 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2295 if (match) { 2296 size_t die_name_length = strlen(die_name); 2297 while (match) { 2298 const char separator_char = ';'; 2299 const char next_char = match[die_name_length]; 2300 if (next_char == '\0' || next_char == separator_char) { 2301 if (match == dont_complete_typenames_cstr || 2302 match[-1] == separator_char) 2303 return false; 2304 } 2305 match = strstr(match + 1, die_name); 2306 } 2307 } 2308 } 2309 } 2310 #endif 2311 2312 const dw_tag_t tag = die.Tag(); 2313 2314 Log *log = 2315 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2316 if (log) 2317 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2318 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2319 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2320 assert(clang_type); 2321 DWARFAttributes attributes; 2322 switch (tag) { 2323 case DW_TAG_structure_type: 2324 case DW_TAG_union_type: 2325 case DW_TAG_class_type: { 2326 ClangASTImporter::LayoutInfo layout_info; 2327 2328 { 2329 if (die.HasChildren()) { 2330 LanguageType class_language = eLanguageTypeUnknown; 2331 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2332 class_language = eLanguageTypeObjC; 2333 // For objective C we don't start the definition when 2334 // the class is created. 2335 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2336 } 2337 2338 int tag_decl_kind = -1; 2339 AccessType default_accessibility = eAccessNone; 2340 if (tag == DW_TAG_structure_type) { 2341 tag_decl_kind = clang::TTK_Struct; 2342 default_accessibility = eAccessPublic; 2343 } else if (tag == DW_TAG_union_type) { 2344 tag_decl_kind = clang::TTK_Union; 2345 default_accessibility = eAccessPublic; 2346 } else if (tag == DW_TAG_class_type) { 2347 tag_decl_kind = clang::TTK_Class; 2348 default_accessibility = eAccessPrivate; 2349 } 2350 2351 SymbolContext sc(die.GetLLDBCompileUnit()); 2352 std::vector<clang::CXXBaseSpecifier *> base_classes; 2353 std::vector<int> member_accessibilities; 2354 bool is_a_class = false; 2355 // Parse members and base classes first 2356 DWARFDIECollection member_function_dies; 2357 2358 DelayedPropertyList delayed_properties; 2359 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2360 member_accessibilities, member_function_dies, 2361 delayed_properties, default_accessibility, is_a_class, 2362 layout_info); 2363 2364 // Now parse any methods if there were any... 2365 size_t num_functions = member_function_dies.Size(); 2366 if (num_functions > 0) { 2367 for (size_t i = 0; i < num_functions; ++i) { 2368 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2369 } 2370 } 2371 2372 if (class_language == eLanguageTypeObjC) { 2373 ConstString class_name(clang_type.GetTypeName()); 2374 if (class_name) { 2375 DIEArray method_die_offsets; 2376 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2377 2378 if (!method_die_offsets.empty()) { 2379 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2380 2381 const size_t num_matches = method_die_offsets.size(); 2382 for (size_t i = 0; i < num_matches; ++i) { 2383 const DIERef &die_ref = method_die_offsets[i]; 2384 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2385 2386 if (method_die) 2387 method_die.ResolveType(); 2388 } 2389 } 2390 2391 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2392 pe = delayed_properties.end(); 2393 pi != pe; ++pi) 2394 pi->Finalize(); 2395 } 2396 } 2397 2398 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2399 // need to tell the clang type it is actually a class. 2400 if (class_language != eLanguageTypeObjC) { 2401 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2402 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2403 clang::TTK_Class); 2404 } 2405 2406 // Since DW_TAG_structure_type gets used for both classes 2407 // and structures, we may need to set any DW_TAG_member 2408 // fields to have a "private" access if none was specified. 2409 // When we parsed the child members we tracked that actual 2410 // accessibility value for each DW_TAG_member in the 2411 // "member_accessibilities" array. If the value for the 2412 // member is zero, then it was set to the "default_accessibility" 2413 // which for structs was "public". Below we correct this 2414 // by setting any fields to "private" that weren't correctly 2415 // set. 2416 if (is_a_class && !member_accessibilities.empty()) { 2417 // This is a class and all members that didn't have 2418 // their access specified are private. 2419 m_ast.SetDefaultAccessForRecordFields( 2420 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2421 &member_accessibilities.front(), member_accessibilities.size()); 2422 } 2423 2424 if (!base_classes.empty()) { 2425 // Make sure all base classes refer to complete types and not 2426 // forward declarations. If we don't do this, clang will crash 2427 // with an assertion in the call to 2428 // clang_type.SetBaseClassesForClassType() 2429 for (auto &base_class : base_classes) { 2430 clang::TypeSourceInfo *type_source_info = 2431 base_class->getTypeSourceInfo(); 2432 if (type_source_info) { 2433 CompilerType base_class_type( 2434 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2435 if (base_class_type.GetCompleteType() == false) { 2436 auto module = dwarf->GetObjectFile()->GetModule(); 2437 module->ReportError(":: Class '%s' has a base class '%s' which " 2438 "does not have a complete definition.", 2439 die.GetName(), 2440 base_class_type.GetTypeName().GetCString()); 2441 if (die.GetCU()->GetProducer() == eProducerClang) 2442 module->ReportError(":: Try compiling the source file with " 2443 "-fstandalone-debug."); 2444 2445 // We have no choice other than to pretend that the base class 2446 // is complete. If we don't do this, clang will crash when we 2447 // call setBases() inside of 2448 // "clang_type.SetBaseClassesForClassType()" 2449 // below. Since we provide layout assistance, all ivars in this 2450 // class and other classes will be fine, this is the best we can 2451 // do 2452 // short of crashing. 2453 if (ClangASTContext::StartTagDeclarationDefinition( 2454 base_class_type)) { 2455 ClangASTContext::CompleteTagDeclarationDefinition( 2456 base_class_type); 2457 } 2458 } 2459 } 2460 } 2461 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2462 &base_classes.front(), 2463 base_classes.size()); 2464 2465 // Clang will copy each CXXBaseSpecifier in "base_classes" 2466 // so we have to free them all. 2467 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2468 base_classes.size()); 2469 } 2470 } 2471 } 2472 2473 addMethodOverrides(m_ast, clang_type); 2474 ClangASTContext::BuildIndirectFields(clang_type); 2475 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2476 2477 if (!layout_info.field_offsets.empty() || 2478 !layout_info.base_offsets.empty() || 2479 !layout_info.vbase_offsets.empty()) { 2480 if (type) 2481 layout_info.bit_size = type->GetByteSize() * 8; 2482 if (layout_info.bit_size == 0) 2483 layout_info.bit_size = 2484 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2485 2486 clang::CXXRecordDecl *record_decl = 2487 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2488 if (record_decl) { 2489 if (log) { 2490 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2491 2492 if (module_sp) { 2493 module_sp->LogMessage( 2494 log, 2495 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2496 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2497 ", alignment = %" PRIu64 2498 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2499 static_cast<void *>(clang_type.GetOpaqueQualType()), 2500 static_cast<void *>(record_decl), layout_info.bit_size, 2501 layout_info.alignment, 2502 static_cast<uint32_t>(layout_info.field_offsets.size()), 2503 static_cast<uint32_t>(layout_info.base_offsets.size()), 2504 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2505 2506 uint32_t idx; 2507 { 2508 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2509 pos, 2510 end = layout_info.field_offsets.end(); 2511 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2512 ++pos, ++idx) { 2513 module_sp->LogMessage( 2514 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2515 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2516 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2517 static_cast<uint32_t>(pos->second), 2518 pos->first->getNameAsString().c_str()); 2519 } 2520 } 2521 2522 { 2523 llvm::DenseMap<const clang::CXXRecordDecl *, 2524 clang::CharUnits>::const_iterator base_pos, 2525 base_end = layout_info.base_offsets.end(); 2526 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2527 base_pos != base_end; ++base_pos, ++idx) { 2528 module_sp->LogMessage( 2529 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2530 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2531 clang_type.GetOpaqueQualType(), idx, 2532 (uint32_t)base_pos->second.getQuantity(), 2533 base_pos->first->getNameAsString().c_str()); 2534 } 2535 } 2536 { 2537 llvm::DenseMap<const clang::CXXRecordDecl *, 2538 clang::CharUnits>::const_iterator vbase_pos, 2539 vbase_end = layout_info.vbase_offsets.end(); 2540 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2541 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2542 module_sp->LogMessage( 2543 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2544 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2545 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2546 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2547 vbase_pos->first->getNameAsString().c_str()); 2548 } 2549 } 2550 } 2551 } 2552 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2553 } 2554 } 2555 } 2556 2557 return (bool)clang_type; 2558 2559 case DW_TAG_enumeration_type: 2560 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2561 if (die.HasChildren()) { 2562 SymbolContext sc(die.GetLLDBCompileUnit()); 2563 bool is_signed = false; 2564 clang_type.IsIntegerType(is_signed); 2565 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2566 die); 2567 } 2568 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2569 } 2570 return (bool)clang_type; 2571 2572 default: 2573 assert(false && "not a forward clang type decl!"); 2574 break; 2575 } 2576 2577 return false; 2578 } 2579 2580 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2581 lldb_private::CompilerDeclContext decl_context) { 2582 std::vector<DWARFDIE> result; 2583 for (auto it = m_decl_ctx_to_die.find( 2584 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2585 it != m_decl_ctx_to_die.end(); it++) 2586 result.push_back(it->second); 2587 return result; 2588 } 2589 2590 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2591 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2592 if (clang_decl != nullptr) 2593 return CompilerDecl(&m_ast, clang_decl); 2594 return CompilerDecl(); 2595 } 2596 2597 CompilerDeclContext 2598 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2599 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2600 if (clang_decl_ctx) 2601 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2602 return CompilerDeclContext(); 2603 } 2604 2605 CompilerDeclContext 2606 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2607 clang::DeclContext *clang_decl_ctx = 2608 GetClangDeclContextContainingDIE(die, nullptr); 2609 if (clang_decl_ctx) 2610 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2611 return CompilerDeclContext(); 2612 } 2613 2614 size_t DWARFASTParserClang::ParseChildEnumerators( 2615 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2616 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2617 if (!parent_die) 2618 return 0; 2619 2620 size_t enumerators_added = 0; 2621 2622 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2623 die = die.GetSibling()) { 2624 const dw_tag_t tag = die.Tag(); 2625 if (tag == DW_TAG_enumerator) { 2626 DWARFAttributes attributes; 2627 const size_t num_child_attributes = die.GetAttributes(attributes); 2628 if (num_child_attributes > 0) { 2629 const char *name = NULL; 2630 bool got_value = false; 2631 int64_t enum_value = 0; 2632 Declaration decl; 2633 2634 uint32_t i; 2635 for (i = 0; i < num_child_attributes; ++i) { 2636 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2637 DWARFFormValue form_value; 2638 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2639 switch (attr) { 2640 case DW_AT_const_value: 2641 got_value = true; 2642 if (is_signed) 2643 enum_value = form_value.Signed(); 2644 else 2645 enum_value = form_value.Unsigned(); 2646 break; 2647 2648 case DW_AT_name: 2649 name = form_value.AsCString(); 2650 break; 2651 2652 case DW_AT_description: 2653 default: 2654 case DW_AT_decl_file: 2655 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2656 form_value.Unsigned())); 2657 break; 2658 case DW_AT_decl_line: 2659 decl.SetLine(form_value.Unsigned()); 2660 break; 2661 case DW_AT_decl_column: 2662 decl.SetColumn(form_value.Unsigned()); 2663 break; 2664 case DW_AT_sibling: 2665 break; 2666 } 2667 } 2668 } 2669 2670 if (name && name[0] && got_value) { 2671 m_ast.AddEnumerationValueToEnumerationType( 2672 clang_type.GetOpaqueQualType(), 2673 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2674 decl, name, enum_value, enumerator_byte_size * 8); 2675 ++enumerators_added; 2676 } 2677 } 2678 } 2679 } 2680 return enumerators_added; 2681 } 2682 2683 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2684 2685 class DIEStack { 2686 public: 2687 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2688 2689 void LogDIEs(Log *log) { 2690 StreamString log_strm; 2691 const size_t n = m_dies.size(); 2692 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2693 for (size_t i = 0; i < n; i++) { 2694 std::string qualified_name; 2695 const DWARFDIE &die = m_dies[i]; 2696 die.GetQualifiedName(qualified_name); 2697 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2698 die.GetOffset(), die.GetTagAsCString(), 2699 qualified_name.c_str()); 2700 } 2701 log->PutCString(log_strm.GetData()); 2702 } 2703 void Pop() { m_dies.pop_back(); } 2704 2705 class ScopedPopper { 2706 public: 2707 ScopedPopper(DIEStack &die_stack) 2708 : m_die_stack(die_stack), m_valid(false) {} 2709 2710 void Push(const DWARFDIE &die) { 2711 m_valid = true; 2712 m_die_stack.Push(die); 2713 } 2714 2715 ~ScopedPopper() { 2716 if (m_valid) 2717 m_die_stack.Pop(); 2718 } 2719 2720 protected: 2721 DIEStack &m_die_stack; 2722 bool m_valid; 2723 }; 2724 2725 protected: 2726 typedef std::vector<DWARFDIE> Stack; 2727 Stack m_dies; 2728 }; 2729 #endif 2730 2731 Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2732 const DWARFDIE &die) { 2733 DWARFRangeList func_ranges; 2734 const char *name = NULL; 2735 const char *mangled = NULL; 2736 int decl_file = 0; 2737 int decl_line = 0; 2738 int decl_column = 0; 2739 int call_file = 0; 2740 int call_line = 0; 2741 int call_column = 0; 2742 DWARFExpression frame_base(die.GetCU()); 2743 2744 const dw_tag_t tag = die.Tag(); 2745 2746 if (tag != DW_TAG_subprogram) 2747 return NULL; 2748 2749 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2750 decl_column, call_file, call_line, call_column, 2751 &frame_base)) { 2752 2753 // Union of all ranges in the function DIE (if the function is 2754 // discontiguous) 2755 AddressRange func_range; 2756 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2757 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2758 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2759 lowest_func_addr <= highest_func_addr) { 2760 ModuleSP module_sp(die.GetModule()); 2761 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2762 lowest_func_addr, module_sp->GetSectionList()); 2763 if (func_range.GetBaseAddress().IsValid()) 2764 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2765 } 2766 2767 if (func_range.GetBaseAddress().IsValid()) { 2768 Mangled func_name; 2769 if (mangled) 2770 func_name.SetValue(ConstString(mangled), true); 2771 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2772 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2773 strcmp(name, "main") != 0) { 2774 // If the mangled name is not present in the DWARF, generate the 2775 // demangled name 2776 // using the decl context. We skip if the function is "main" as its name 2777 // is 2778 // never mangled. 2779 bool is_static = false; 2780 bool is_variadic = false; 2781 bool has_template_params = false; 2782 unsigned type_quals = 0; 2783 std::vector<CompilerType> param_types; 2784 std::vector<clang::ParmVarDecl *> param_decls; 2785 DWARFDeclContext decl_ctx; 2786 StreamString sstr; 2787 2788 die.GetDWARFDeclContext(decl_ctx); 2789 sstr << decl_ctx.GetQualifiedName(); 2790 2791 clang::DeclContext *containing_decl_ctx = 2792 GetClangDeclContextContainingDIE(die, nullptr); 2793 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2794 is_variadic, has_template_params, param_types, 2795 param_decls, type_quals); 2796 sstr << "("; 2797 for (size_t i = 0; i < param_types.size(); i++) { 2798 if (i > 0) 2799 sstr << ", "; 2800 sstr << param_types[i].GetTypeName(); 2801 } 2802 if (is_variadic) 2803 sstr << ", ..."; 2804 sstr << ")"; 2805 if (type_quals & clang::Qualifiers::Const) 2806 sstr << " const"; 2807 2808 func_name.SetValue(ConstString(sstr.GetString()), false); 2809 } else 2810 func_name.SetValue(ConstString(name), false); 2811 2812 FunctionSP func_sp; 2813 std::unique_ptr<Declaration> decl_ap; 2814 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2815 decl_ap.reset(new Declaration( 2816 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2817 decl_line, decl_column)); 2818 2819 SymbolFileDWARF *dwarf = die.GetDWARF(); 2820 // Supply the type _only_ if it has already been parsed 2821 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2822 2823 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2824 2825 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2826 const user_id_t func_user_id = die.GetID(); 2827 func_sp.reset(new Function(sc.comp_unit, 2828 func_user_id, // UserID is the DIE offset 2829 func_user_id, func_name, func_type, 2830 func_range)); // first address range 2831 2832 if (func_sp.get() != NULL) { 2833 if (frame_base.IsValid()) 2834 func_sp->GetFrameBaseExpression() = frame_base; 2835 sc.comp_unit->AddFunction(func_sp); 2836 return func_sp.get(); 2837 } 2838 } 2839 } 2840 } 2841 return NULL; 2842 } 2843 2844 bool DWARFASTParserClang::ParseChildMembers( 2845 const SymbolContext &sc, const DWARFDIE &parent_die, 2846 CompilerType &class_clang_type, const LanguageType class_language, 2847 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2848 std::vector<int> &member_accessibilities, 2849 DWARFDIECollection &member_function_dies, 2850 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2851 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2852 if (!parent_die) 2853 return 0; 2854 2855 // Get the parent byte size so we can verify any members will fit 2856 const uint64_t parent_byte_size = 2857 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2858 const uint64_t parent_bit_size = 2859 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2860 2861 uint32_t member_idx = 0; 2862 BitfieldInfo last_field_info; 2863 2864 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2865 ClangASTContext *ast = 2866 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2867 if (ast == nullptr) 2868 return 0; 2869 2870 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2871 die = die.GetSibling()) { 2872 dw_tag_t tag = die.Tag(); 2873 2874 switch (tag) { 2875 case DW_TAG_member: 2876 case DW_TAG_APPLE_property: { 2877 DWARFAttributes attributes; 2878 const size_t num_attributes = die.GetAttributes(attributes); 2879 if (num_attributes > 0) { 2880 Declaration decl; 2881 // DWARFExpression location; 2882 const char *name = NULL; 2883 const char *prop_name = NULL; 2884 const char *prop_getter_name = NULL; 2885 const char *prop_setter_name = NULL; 2886 uint32_t prop_attributes = 0; 2887 2888 bool is_artificial = false; 2889 DWARFFormValue encoding_form; 2890 AccessType accessibility = eAccessNone; 2891 uint32_t member_byte_offset = 2892 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2893 size_t byte_size = 0; 2894 int64_t bit_offset = 0; 2895 uint64_t data_bit_offset = UINT64_MAX; 2896 size_t bit_size = 0; 2897 bool is_external = 2898 false; // On DW_TAG_members, this means the member is static 2899 uint32_t i; 2900 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2901 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2902 DWARFFormValue form_value; 2903 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2904 switch (attr) { 2905 case DW_AT_decl_file: 2906 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2907 form_value.Unsigned())); 2908 break; 2909 case DW_AT_decl_line: 2910 decl.SetLine(form_value.Unsigned()); 2911 break; 2912 case DW_AT_decl_column: 2913 decl.SetColumn(form_value.Unsigned()); 2914 break; 2915 case DW_AT_name: 2916 name = form_value.AsCString(); 2917 break; 2918 case DW_AT_type: 2919 encoding_form = form_value; 2920 break; 2921 case DW_AT_bit_offset: 2922 bit_offset = form_value.Signed(); 2923 break; 2924 case DW_AT_bit_size: 2925 bit_size = form_value.Unsigned(); 2926 break; 2927 case DW_AT_byte_size: 2928 byte_size = form_value.Unsigned(); 2929 break; 2930 case DW_AT_data_bit_offset: 2931 data_bit_offset = form_value.Unsigned(); 2932 break; 2933 case DW_AT_data_member_location: 2934 if (form_value.BlockData()) { 2935 Value initialValue(0); 2936 Value memberOffset(0); 2937 const DWARFDataExtractor &debug_info_data = 2938 die.GetDWARF()->get_debug_info_data(); 2939 uint32_t block_length = form_value.Unsigned(); 2940 uint32_t block_offset = 2941 form_value.BlockData() - debug_info_data.GetDataStart(); 2942 if (DWARFExpression::Evaluate( 2943 nullptr, // ExecutionContext * 2944 nullptr, // RegisterContext * 2945 module_sp, debug_info_data, die.GetCU(), block_offset, 2946 block_length, eRegisterKindDWARF, &initialValue, 2947 nullptr, memberOffset, nullptr)) { 2948 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2949 } 2950 } else { 2951 // With DWARF 3 and later, if the value is an integer constant, 2952 // this form value is the offset in bytes from the beginning 2953 // of the containing entity. 2954 member_byte_offset = form_value.Unsigned(); 2955 } 2956 break; 2957 2958 case DW_AT_accessibility: 2959 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2960 break; 2961 case DW_AT_artificial: 2962 is_artificial = form_value.Boolean(); 2963 break; 2964 case DW_AT_APPLE_property_name: 2965 prop_name = form_value.AsCString(); 2966 break; 2967 case DW_AT_APPLE_property_getter: 2968 prop_getter_name = form_value.AsCString(); 2969 break; 2970 case DW_AT_APPLE_property_setter: 2971 prop_setter_name = form_value.AsCString(); 2972 break; 2973 case DW_AT_APPLE_property_attribute: 2974 prop_attributes = form_value.Unsigned(); 2975 break; 2976 case DW_AT_external: 2977 is_external = form_value.Boolean(); 2978 break; 2979 2980 default: 2981 case DW_AT_declaration: 2982 case DW_AT_description: 2983 case DW_AT_mutable: 2984 case DW_AT_visibility: 2985 case DW_AT_sibling: 2986 break; 2987 } 2988 } 2989 } 2990 2991 if (prop_name) { 2992 ConstString fixed_getter; 2993 ConstString fixed_setter; 2994 2995 // Check if the property getter/setter were provided as full 2996 // names. We want basenames, so we extract them. 2997 2998 if (prop_getter_name && prop_getter_name[0] == '-') { 2999 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 3000 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 3001 } 3002 3003 if (prop_setter_name && prop_setter_name[0] == '-') { 3004 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 3005 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 3006 } 3007 3008 // If the names haven't been provided, they need to be 3009 // filled in. 3010 3011 if (!prop_getter_name) { 3012 prop_getter_name = prop_name; 3013 } 3014 if (!prop_setter_name && prop_name[0] && 3015 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 3016 StreamString ss; 3017 3018 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 3019 3020 fixed_setter.SetString(ss.GetString()); 3021 prop_setter_name = fixed_setter.GetCString(); 3022 } 3023 } 3024 3025 // Clang has a DWARF generation bug where sometimes it 3026 // represents fields that are references with bad byte size 3027 // and bit size/offset information such as: 3028 // 3029 // DW_AT_byte_size( 0x00 ) 3030 // DW_AT_bit_size( 0x40 ) 3031 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 3032 // 3033 // So check the bit offset to make sure it is sane, and if 3034 // the values are not sane, remove them. If we don't do this 3035 // then we will end up with a crash if we try to use this 3036 // type in an expression when clang becomes unhappy with its 3037 // recycled debug info. 3038 3039 if (byte_size == 0 && bit_offset < 0) { 3040 bit_size = 0; 3041 bit_offset = 0; 3042 } 3043 3044 // FIXME: Make Clang ignore Objective-C accessibility for expressions 3045 if (class_language == eLanguageTypeObjC || 3046 class_language == eLanguageTypeObjC_plus_plus) 3047 accessibility = eAccessNone; 3048 3049 if (member_idx == 0 && !is_artificial && name && 3050 (strstr(name, "_vptr$") == name)) { 3051 // Not all compilers will mark the vtable pointer 3052 // member as artificial (llvm-gcc). We can't have 3053 // the virtual members in our classes otherwise it 3054 // throws off all child offsets since we end up 3055 // having and extra pointer sized member in our 3056 // class layouts. 3057 is_artificial = true; 3058 } 3059 3060 // Handle static members 3061 if (is_external && member_byte_offset == UINT32_MAX) { 3062 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 3063 3064 if (var_type) { 3065 if (accessibility == eAccessNone) 3066 accessibility = eAccessPublic; 3067 ClangASTContext::AddVariableToRecordType( 3068 class_clang_type, name, var_type->GetLayoutCompilerType(), 3069 accessibility); 3070 } 3071 break; 3072 } 3073 3074 if (is_artificial == false) { 3075 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 3076 3077 clang::FieldDecl *field_decl = NULL; 3078 if (tag == DW_TAG_member) { 3079 if (member_type) { 3080 if (accessibility == eAccessNone) 3081 accessibility = default_accessibility; 3082 member_accessibilities.push_back(accessibility); 3083 3084 uint64_t field_bit_offset = 3085 (member_byte_offset == UINT32_MAX ? 0 3086 : (member_byte_offset * 8)); 3087 if (bit_size > 0) { 3088 3089 BitfieldInfo this_field_info; 3090 this_field_info.bit_offset = field_bit_offset; 3091 this_field_info.bit_size = bit_size; 3092 3093 ///////////////////////////////////////////////////////////// 3094 // How to locate a field given the DWARF debug information 3095 // 3096 // AT_byte_size indicates the size of the word in which the 3097 // bit offset must be interpreted. 3098 // 3099 // AT_data_member_location indicates the byte offset of the 3100 // word from the base address of the structure. 3101 // 3102 // AT_bit_offset indicates how many bits into the word 3103 // (according to the host endianness) the low-order bit of 3104 // the field starts. AT_bit_offset can be negative. 3105 // 3106 // AT_bit_size indicates the size of the field in bits. 3107 ///////////////////////////////////////////////////////////// 3108 3109 if (data_bit_offset != UINT64_MAX) { 3110 this_field_info.bit_offset = data_bit_offset; 3111 } else { 3112 if (byte_size == 0) 3113 byte_size = member_type->GetByteSize(); 3114 3115 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3116 if (objfile->GetByteOrder() == eByteOrderLittle) { 3117 this_field_info.bit_offset += byte_size * 8; 3118 this_field_info.bit_offset -= (bit_offset + bit_size); 3119 } else { 3120 this_field_info.bit_offset += bit_offset; 3121 } 3122 } 3123 3124 if ((this_field_info.bit_offset >= parent_bit_size) || 3125 !last_field_info.NextBitfieldOffsetIsValid( 3126 this_field_info.bit_offset)) { 3127 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3128 objfile->GetModule()->ReportWarning( 3129 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 3130 "bit offset (0x%8.8" PRIx64 3131 ") member will be ignored. Please file a bug against the " 3132 "compiler and include the preprocessed output for %s\n", 3133 die.GetID(), DW_TAG_value_to_name(tag), name, 3134 this_field_info.bit_offset, 3135 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3136 : "the source file"); 3137 this_field_info.Clear(); 3138 continue; 3139 } 3140 3141 // Update the field bit offset we will report for layout 3142 field_bit_offset = this_field_info.bit_offset; 3143 3144 // If the member to be emitted did not start on a character 3145 // boundary and there is 3146 // empty space between the last field and this one, then we need 3147 // to emit an 3148 // anonymous member filling up the space up to its start. There 3149 // are three cases 3150 // here: 3151 // 3152 // 1 If the previous member ended on a character boundary, then 3153 // we can emit an 3154 // anonymous member starting at the most recent character 3155 // boundary. 3156 // 3157 // 2 If the previous member did not end on a character boundary 3158 // and the distance 3159 // from the end of the previous member to the current member 3160 // is less than a 3161 // word width, then we can emit an anonymous member starting 3162 // right after the 3163 // previous member and right before this member. 3164 // 3165 // 3 If the previous member did not end on a character boundary 3166 // and the distance 3167 // from the end of the previous member to the current member 3168 // is greater than 3169 // or equal a word width, then we act as in Case 1. 3170 3171 const uint64_t character_width = 8; 3172 const uint64_t word_width = 32; 3173 3174 // Objective-C has invalid DW_AT_bit_offset values in older 3175 // versions 3176 // of clang, so we have to be careful and only insert unnamed 3177 // bitfields 3178 // if we have a new enough clang. 3179 bool detect_unnamed_bitfields = true; 3180 3181 if (class_language == eLanguageTypeObjC || 3182 class_language == eLanguageTypeObjC_plus_plus) 3183 detect_unnamed_bitfields = 3184 die.GetCU()->Supports_unnamed_objc_bitfields(); 3185 3186 if (detect_unnamed_bitfields) { 3187 BitfieldInfo anon_field_info; 3188 3189 if ((this_field_info.bit_offset % character_width) != 3190 0) // not char aligned 3191 { 3192 uint64_t last_field_end = 0; 3193 3194 if (last_field_info.IsValid()) 3195 last_field_end = 3196 last_field_info.bit_offset + last_field_info.bit_size; 3197 3198 if (this_field_info.bit_offset != last_field_end) { 3199 if (((last_field_end % character_width) == 0) || // case 1 3200 (this_field_info.bit_offset - last_field_end >= 3201 word_width)) // case 3 3202 { 3203 anon_field_info.bit_size = 3204 this_field_info.bit_offset % character_width; 3205 anon_field_info.bit_offset = 3206 this_field_info.bit_offset - 3207 anon_field_info.bit_size; 3208 } else // case 2 3209 { 3210 anon_field_info.bit_size = 3211 this_field_info.bit_offset - last_field_end; 3212 anon_field_info.bit_offset = last_field_end; 3213 } 3214 } 3215 } 3216 3217 if (anon_field_info.IsValid()) { 3218 clang::FieldDecl *unnamed_bitfield_decl = 3219 ClangASTContext::AddFieldToRecordType( 3220 class_clang_type, NULL, 3221 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3222 eEncodingSint, word_width), 3223 accessibility, anon_field_info.bit_size); 3224 3225 layout_info.field_offsets.insert(std::make_pair( 3226 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3227 } 3228 } 3229 last_field_info = this_field_info; 3230 } else { 3231 last_field_info.Clear(); 3232 } 3233 3234 CompilerType member_clang_type = 3235 member_type->GetLayoutCompilerType(); 3236 if (!member_clang_type.IsCompleteType()) 3237 member_clang_type.GetCompleteType(); 3238 3239 { 3240 // Older versions of clang emit array[0] and array[1] in the 3241 // same way (<rdar://problem/12566646>). 3242 // If the current field is at the end of the structure, then 3243 // there is definitely no room for extra 3244 // elements and we override the type to array[0]. 3245 3246 CompilerType member_array_element_type; 3247 uint64_t member_array_size; 3248 bool member_array_is_incomplete; 3249 3250 if (member_clang_type.IsArrayType( 3251 &member_array_element_type, &member_array_size, 3252 &member_array_is_incomplete) && 3253 !member_array_is_incomplete) { 3254 uint64_t parent_byte_size = 3255 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3256 UINT64_MAX); 3257 3258 if (member_byte_offset >= parent_byte_size) { 3259 if (member_array_size != 1 && 3260 (member_array_size != 0 || 3261 member_byte_offset > parent_byte_size)) { 3262 module_sp->ReportError( 3263 "0x%8.8" PRIx64 3264 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3265 " which extends beyond the bounds of 0x%8.8" PRIx64, 3266 die.GetID(), name, encoding_form.Reference(), 3267 parent_die.GetID()); 3268 } 3269 3270 member_clang_type = m_ast.CreateArrayType( 3271 member_array_element_type, 0, false); 3272 } 3273 } 3274 } 3275 3276 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3277 member_clang_type.GetCompleteType() == false) { 3278 if (die.GetCU()->GetProducer() == eProducerClang) 3279 module_sp->ReportError( 3280 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3281 "0x%8.8x (%s) whose type is a forward declaration, not a " 3282 "complete definition.\nTry compiling the source file " 3283 "with -fstandalone-debug", 3284 parent_die.GetOffset(), parent_die.GetName(), 3285 die.GetOffset(), name); 3286 else 3287 module_sp->ReportError( 3288 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3289 "0x%8.8x (%s) whose type is a forward declaration, not a " 3290 "complete definition.\nPlease file a bug against the " 3291 "compiler and include the preprocessed output for %s", 3292 parent_die.GetOffset(), parent_die.GetName(), 3293 die.GetOffset(), name, 3294 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3295 : "the source file"); 3296 // We have no choice other than to pretend that the member class 3297 // is complete. If we don't do this, clang will crash when 3298 // trying 3299 // to layout the class. Since we provide layout assistance, all 3300 // ivars in this class and other classes will be fine, this is 3301 // the best we can do short of crashing. 3302 if (ClangASTContext::StartTagDeclarationDefinition( 3303 member_clang_type)) { 3304 ClangASTContext::CompleteTagDeclarationDefinition( 3305 member_clang_type); 3306 } else { 3307 module_sp->ReportError( 3308 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3309 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3310 "were not able to start its definition.\nPlease file a " 3311 "bug and attach the file at the start of this error " 3312 "message", 3313 parent_die.GetOffset(), parent_die.GetName(), 3314 die.GetOffset(), name); 3315 } 3316 } 3317 3318 field_decl = ClangASTContext::AddFieldToRecordType( 3319 class_clang_type, name, member_clang_type, accessibility, 3320 bit_size); 3321 3322 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3323 3324 layout_info.field_offsets.insert( 3325 std::make_pair(field_decl, field_bit_offset)); 3326 } else { 3327 if (name) 3328 module_sp->ReportError( 3329 "0x%8.8" PRIx64 3330 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3331 " which was unable to be parsed", 3332 die.GetID(), name, encoding_form.Reference()); 3333 else 3334 module_sp->ReportError( 3335 "0x%8.8" PRIx64 3336 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3337 " which was unable to be parsed", 3338 die.GetID(), encoding_form.Reference()); 3339 } 3340 } 3341 3342 if (prop_name != NULL && member_type) { 3343 clang::ObjCIvarDecl *ivar_decl = NULL; 3344 3345 if (field_decl) { 3346 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3347 assert(ivar_decl != NULL); 3348 } 3349 3350 ClangASTMetadata metadata; 3351 metadata.SetUserID(die.GetID()); 3352 delayed_properties.push_back(DelayedAddObjCClassProperty( 3353 class_clang_type, prop_name, 3354 member_type->GetLayoutCompilerType(), ivar_decl, 3355 prop_setter_name, prop_getter_name, prop_attributes, 3356 &metadata)); 3357 3358 if (ivar_decl) 3359 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3360 } 3361 } 3362 } 3363 ++member_idx; 3364 } break; 3365 3366 case DW_TAG_subprogram: 3367 // Let the type parsing code handle this one for us. 3368 member_function_dies.Append(die); 3369 break; 3370 3371 case DW_TAG_inheritance: { 3372 is_a_class = true; 3373 if (default_accessibility == eAccessNone) 3374 default_accessibility = eAccessPrivate; 3375 // TODO: implement DW_TAG_inheritance type parsing 3376 DWARFAttributes attributes; 3377 const size_t num_attributes = die.GetAttributes(attributes); 3378 if (num_attributes > 0) { 3379 Declaration decl; 3380 DWARFExpression location(die.GetCU()); 3381 DWARFFormValue encoding_form; 3382 AccessType accessibility = default_accessibility; 3383 bool is_virtual = false; 3384 bool is_base_of_class = true; 3385 off_t member_byte_offset = 0; 3386 uint32_t i; 3387 for (i = 0; i < num_attributes; ++i) { 3388 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3389 DWARFFormValue form_value; 3390 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3391 switch (attr) { 3392 case DW_AT_decl_file: 3393 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3394 form_value.Unsigned())); 3395 break; 3396 case DW_AT_decl_line: 3397 decl.SetLine(form_value.Unsigned()); 3398 break; 3399 case DW_AT_decl_column: 3400 decl.SetColumn(form_value.Unsigned()); 3401 break; 3402 case DW_AT_type: 3403 encoding_form = form_value; 3404 break; 3405 case DW_AT_data_member_location: 3406 if (form_value.BlockData()) { 3407 Value initialValue(0); 3408 Value memberOffset(0); 3409 const DWARFDataExtractor &debug_info_data = 3410 die.GetDWARF()->get_debug_info_data(); 3411 uint32_t block_length = form_value.Unsigned(); 3412 uint32_t block_offset = 3413 form_value.BlockData() - debug_info_data.GetDataStart(); 3414 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3415 debug_info_data, die.GetCU(), 3416 block_offset, block_length, 3417 eRegisterKindDWARF, &initialValue, 3418 nullptr, memberOffset, nullptr)) { 3419 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3420 } 3421 } else { 3422 // With DWARF 3 and later, if the value is an integer constant, 3423 // this form value is the offset in bytes from the beginning 3424 // of the containing entity. 3425 member_byte_offset = form_value.Unsigned(); 3426 } 3427 break; 3428 3429 case DW_AT_accessibility: 3430 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3431 break; 3432 3433 case DW_AT_virtuality: 3434 is_virtual = form_value.Boolean(); 3435 break; 3436 3437 case DW_AT_sibling: 3438 break; 3439 3440 default: 3441 break; 3442 } 3443 } 3444 } 3445 3446 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3447 if (base_class_type == NULL) { 3448 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3449 "resolve the base class at 0x%8.8" PRIx64 3450 " from enclosing type 0x%8.8x. \nPlease file " 3451 "a bug and attach the file at the start of " 3452 "this error message", 3453 die.GetOffset(), encoding_form.Reference(), 3454 parent_die.GetOffset()); 3455 break; 3456 } 3457 3458 CompilerType base_class_clang_type = 3459 base_class_type->GetFullCompilerType(); 3460 assert(base_class_clang_type); 3461 if (class_language == eLanguageTypeObjC) { 3462 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3463 } else { 3464 base_classes.push_back(ast->CreateBaseClassSpecifier( 3465 base_class_clang_type.GetOpaqueQualType(), accessibility, 3466 is_virtual, is_base_of_class)); 3467 3468 if (is_virtual) { 3469 // Do not specify any offset for virtual inheritance. The DWARF 3470 // produced by clang doesn't 3471 // give us a constant offset, but gives us a DWARF expressions that 3472 // requires an actual object 3473 // in memory. the DW_AT_data_member_location for a virtual base 3474 // class looks like: 3475 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3476 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3477 // DW_OP_plus ) 3478 // Given this, there is really no valid response we can give to 3479 // clang for virtual base 3480 // class offsets, and this should eventually be removed from 3481 // LayoutRecordType() in the external 3482 // AST source in clang. 3483 } else { 3484 layout_info.base_offsets.insert(std::make_pair( 3485 ast->GetAsCXXRecordDecl( 3486 base_class_clang_type.GetOpaqueQualType()), 3487 clang::CharUnits::fromQuantity(member_byte_offset))); 3488 } 3489 } 3490 } 3491 } break; 3492 3493 default: 3494 break; 3495 } 3496 } 3497 3498 return true; 3499 } 3500 3501 size_t DWARFASTParserClang::ParseChildParameters( 3502 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3503 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3504 bool &is_variadic, bool &has_template_params, 3505 std::vector<CompilerType> &function_param_types, 3506 std::vector<clang::ParmVarDecl *> &function_param_decls, 3507 unsigned &type_quals) { 3508 if (!parent_die) 3509 return 0; 3510 3511 size_t arg_idx = 0; 3512 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3513 die = die.GetSibling()) { 3514 const dw_tag_t tag = die.Tag(); 3515 switch (tag) { 3516 case DW_TAG_formal_parameter: { 3517 DWARFAttributes attributes; 3518 const size_t num_attributes = die.GetAttributes(attributes); 3519 if (num_attributes > 0) { 3520 const char *name = NULL; 3521 Declaration decl; 3522 DWARFFormValue param_type_die_form; 3523 bool is_artificial = false; 3524 // one of None, Auto, Register, Extern, Static, PrivateExtern 3525 3526 clang::StorageClass storage = clang::SC_None; 3527 uint32_t i; 3528 for (i = 0; i < num_attributes; ++i) { 3529 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3530 DWARFFormValue form_value; 3531 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3532 switch (attr) { 3533 case DW_AT_decl_file: 3534 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3535 form_value.Unsigned())); 3536 break; 3537 case DW_AT_decl_line: 3538 decl.SetLine(form_value.Unsigned()); 3539 break; 3540 case DW_AT_decl_column: 3541 decl.SetColumn(form_value.Unsigned()); 3542 break; 3543 case DW_AT_name: 3544 name = form_value.AsCString(); 3545 break; 3546 case DW_AT_type: 3547 param_type_die_form = form_value; 3548 break; 3549 case DW_AT_artificial: 3550 is_artificial = form_value.Boolean(); 3551 break; 3552 case DW_AT_location: 3553 // if (form_value.BlockData()) 3554 // { 3555 // const DWARFDataExtractor& 3556 // debug_info_data = debug_info(); 3557 // uint32_t block_length = 3558 // form_value.Unsigned(); 3559 // DWARFDataExtractor 3560 // location(debug_info_data, 3561 // form_value.BlockData() - 3562 // debug_info_data.GetDataStart(), 3563 // block_length); 3564 // } 3565 // else 3566 // { 3567 // } 3568 // break; 3569 case DW_AT_const_value: 3570 case DW_AT_default_value: 3571 case DW_AT_description: 3572 case DW_AT_endianity: 3573 case DW_AT_is_optional: 3574 case DW_AT_segment: 3575 case DW_AT_variable_parameter: 3576 default: 3577 case DW_AT_abstract_origin: 3578 case DW_AT_sibling: 3579 break; 3580 } 3581 } 3582 } 3583 3584 bool skip = false; 3585 if (skip_artificial) { 3586 if (is_artificial) { 3587 // In order to determine if a C++ member function is 3588 // "const" we have to look at the const-ness of "this"... 3589 // Ugly, but that 3590 if (arg_idx == 0) { 3591 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3592 // Often times compilers omit the "this" name for the 3593 // specification DIEs, so we can't rely upon the name 3594 // being in the formal parameter DIE... 3595 if (name == NULL || ::strcmp(name, "this") == 0) { 3596 Type *this_type = 3597 die.ResolveTypeUID(DIERef(param_type_die_form)); 3598 if (this_type) { 3599 uint32_t encoding_mask = this_type->GetEncodingMask(); 3600 if (encoding_mask & Type::eEncodingIsPointerUID) { 3601 is_static = false; 3602 3603 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3604 type_quals |= clang::Qualifiers::Const; 3605 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3606 type_quals |= clang::Qualifiers::Volatile; 3607 } 3608 } 3609 } 3610 } 3611 } 3612 skip = true; 3613 } else { 3614 3615 // HACK: Objective C formal parameters "self" and "_cmd" 3616 // are not marked as artificial in the DWARF... 3617 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3618 if (comp_unit) { 3619 switch (comp_unit->GetLanguage()) { 3620 case eLanguageTypeObjC: 3621 case eLanguageTypeObjC_plus_plus: 3622 if (name && name[0] && 3623 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3624 skip = true; 3625 break; 3626 default: 3627 break; 3628 } 3629 } 3630 } 3631 } 3632 3633 if (!skip) { 3634 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3635 if (type) { 3636 function_param_types.push_back(type->GetForwardCompilerType()); 3637 3638 clang::ParmVarDecl *param_var_decl = 3639 m_ast.CreateParameterDeclaration( 3640 name, type->GetForwardCompilerType(), storage); 3641 assert(param_var_decl); 3642 function_param_decls.push_back(param_var_decl); 3643 3644 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3645 } 3646 } 3647 } 3648 arg_idx++; 3649 } break; 3650 3651 case DW_TAG_unspecified_parameters: 3652 is_variadic = true; 3653 break; 3654 3655 case DW_TAG_template_type_parameter: 3656 case DW_TAG_template_value_parameter: 3657 case DW_TAG_GNU_template_parameter_pack: 3658 // The one caller of this was never using the template_param_infos, 3659 // and the local variable was taking up a large amount of stack space 3660 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3661 // the template params back, we can add them back. 3662 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3663 has_template_params = true; 3664 break; 3665 3666 default: 3667 break; 3668 } 3669 } 3670 return arg_idx; 3671 } 3672 3673 void DWARFASTParserClang::ParseChildArrayInfo( 3674 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3675 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3676 uint32_t &bit_stride) { 3677 if (!parent_die) 3678 return; 3679 3680 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3681 die = die.GetSibling()) { 3682 const dw_tag_t tag = die.Tag(); 3683 switch (tag) { 3684 case DW_TAG_subrange_type: { 3685 DWARFAttributes attributes; 3686 const size_t num_child_attributes = die.GetAttributes(attributes); 3687 if (num_child_attributes > 0) { 3688 uint64_t num_elements = 0; 3689 uint64_t lower_bound = 0; 3690 uint64_t upper_bound = 0; 3691 bool upper_bound_valid = false; 3692 uint32_t i; 3693 for (i = 0; i < num_child_attributes; ++i) { 3694 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3695 DWARFFormValue form_value; 3696 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3697 switch (attr) { 3698 case DW_AT_name: 3699 break; 3700 3701 case DW_AT_count: 3702 num_elements = form_value.Unsigned(); 3703 break; 3704 3705 case DW_AT_bit_stride: 3706 bit_stride = form_value.Unsigned(); 3707 break; 3708 3709 case DW_AT_byte_stride: 3710 byte_stride = form_value.Unsigned(); 3711 break; 3712 3713 case DW_AT_lower_bound: 3714 lower_bound = form_value.Unsigned(); 3715 break; 3716 3717 case DW_AT_upper_bound: 3718 upper_bound_valid = true; 3719 upper_bound = form_value.Unsigned(); 3720 break; 3721 3722 default: 3723 case DW_AT_abstract_origin: 3724 case DW_AT_accessibility: 3725 case DW_AT_allocated: 3726 case DW_AT_associated: 3727 case DW_AT_data_location: 3728 case DW_AT_declaration: 3729 case DW_AT_description: 3730 case DW_AT_sibling: 3731 case DW_AT_threads_scaled: 3732 case DW_AT_type: 3733 case DW_AT_visibility: 3734 break; 3735 } 3736 } 3737 } 3738 3739 if (num_elements == 0) { 3740 if (upper_bound_valid && upper_bound >= lower_bound) 3741 num_elements = upper_bound - lower_bound + 1; 3742 } 3743 3744 element_orders.push_back(num_elements); 3745 } 3746 } break; 3747 } 3748 } 3749 } 3750 3751 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3752 if (die) { 3753 SymbolFileDWARF *dwarf = die.GetDWARF(); 3754 DWARFAttributes attributes; 3755 const size_t num_attributes = die.GetAttributes(attributes); 3756 if (num_attributes > 0) { 3757 DWARFFormValue type_die_form; 3758 for (size_t i = 0; i < num_attributes; ++i) { 3759 dw_attr_t attr = attributes.AttributeAtIndex(i); 3760 DWARFFormValue form_value; 3761 3762 if (attr == DW_AT_type && 3763 attributes.ExtractFormValueAtIndex(i, form_value)) 3764 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3765 } 3766 } 3767 } 3768 3769 return nullptr; 3770 } 3771 3772 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3773 if (!die) 3774 return nullptr; 3775 3776 switch (die.Tag()) { 3777 case DW_TAG_variable: 3778 case DW_TAG_constant: 3779 case DW_TAG_formal_parameter: 3780 case DW_TAG_imported_declaration: 3781 case DW_TAG_imported_module: 3782 break; 3783 default: 3784 return nullptr; 3785 } 3786 3787 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3788 if (cache_pos != m_die_to_decl.end()) 3789 return cache_pos->second; 3790 3791 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3792 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3793 m_die_to_decl[die.GetDIE()] = decl; 3794 m_decl_to_die[decl].insert(die.GetDIE()); 3795 return decl; 3796 } 3797 3798 if (DWARFDIE abstract_origin_die = 3799 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3800 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3801 m_die_to_decl[die.GetDIE()] = decl; 3802 m_decl_to_die[decl].insert(die.GetDIE()); 3803 return decl; 3804 } 3805 3806 clang::Decl *decl = nullptr; 3807 switch (die.Tag()) { 3808 case DW_TAG_variable: 3809 case DW_TAG_constant: 3810 case DW_TAG_formal_parameter: { 3811 SymbolFileDWARF *dwarf = die.GetDWARF(); 3812 Type *type = GetTypeForDIE(die); 3813 if (dwarf && type) { 3814 const char *name = die.GetName(); 3815 clang::DeclContext *decl_context = 3816 ClangASTContext::DeclContextGetAsDeclContext( 3817 dwarf->GetDeclContextContainingUID(die.GetID())); 3818 decl = m_ast.CreateVariableDeclaration( 3819 decl_context, name, 3820 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3821 } 3822 break; 3823 } 3824 case DW_TAG_imported_declaration: { 3825 SymbolFileDWARF *dwarf = die.GetDWARF(); 3826 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3827 if (imported_uid) { 3828 CompilerDecl imported_decl = imported_uid.GetDecl(); 3829 if (imported_decl) { 3830 clang::DeclContext *decl_context = 3831 ClangASTContext::DeclContextGetAsDeclContext( 3832 dwarf->GetDeclContextContainingUID(die.GetID())); 3833 if (clang::NamedDecl *clang_imported_decl = 3834 llvm::dyn_cast<clang::NamedDecl>( 3835 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3836 decl = 3837 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3838 } 3839 } 3840 break; 3841 } 3842 case DW_TAG_imported_module: { 3843 SymbolFileDWARF *dwarf = die.GetDWARF(); 3844 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3845 3846 if (imported_uid) { 3847 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3848 if (imported_decl_ctx) { 3849 clang::DeclContext *decl_context = 3850 ClangASTContext::DeclContextGetAsDeclContext( 3851 dwarf->GetDeclContextContainingUID(die.GetID())); 3852 if (clang::NamespaceDecl *ns_decl = 3853 ClangASTContext::DeclContextGetAsNamespaceDecl( 3854 imported_decl_ctx)) 3855 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3856 } 3857 } 3858 break; 3859 } 3860 default: 3861 break; 3862 } 3863 3864 m_die_to_decl[die.GetDIE()] = decl; 3865 m_decl_to_die[decl].insert(die.GetDIE()); 3866 3867 return decl; 3868 } 3869 3870 clang::DeclContext * 3871 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3872 if (die) { 3873 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3874 if (decl_ctx) 3875 return decl_ctx; 3876 3877 bool try_parsing_type = true; 3878 switch (die.Tag()) { 3879 case DW_TAG_compile_unit: 3880 decl_ctx = m_ast.GetTranslationUnitDecl(); 3881 try_parsing_type = false; 3882 break; 3883 3884 case DW_TAG_namespace: 3885 decl_ctx = ResolveNamespaceDIE(die); 3886 try_parsing_type = false; 3887 break; 3888 3889 case DW_TAG_lexical_block: 3890 decl_ctx = GetDeclContextForBlock(die); 3891 try_parsing_type = false; 3892 break; 3893 3894 default: 3895 break; 3896 } 3897 3898 if (decl_ctx == nullptr && try_parsing_type) { 3899 Type *type = die.GetDWARF()->ResolveType(die); 3900 if (type) 3901 decl_ctx = GetCachedClangDeclContextForDIE(die); 3902 } 3903 3904 if (decl_ctx) { 3905 LinkDeclContextToDIE(decl_ctx, die); 3906 return decl_ctx; 3907 } 3908 } 3909 return nullptr; 3910 } 3911 3912 static bool IsSubroutine(const DWARFDIE &die) { 3913 switch (die.Tag()) { 3914 case DW_TAG_subprogram: 3915 case DW_TAG_inlined_subroutine: 3916 return true; 3917 default: 3918 return false; 3919 } 3920 } 3921 3922 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3923 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3924 if (IsSubroutine(candidate)) { 3925 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3926 return candidate; 3927 } else { 3928 return DWARFDIE(); 3929 } 3930 } 3931 } 3932 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3933 "something not in a function"); 3934 return DWARFDIE(); 3935 } 3936 3937 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3938 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3939 candidate = candidate.GetSibling()) { 3940 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3941 return candidate; 3942 } 3943 } 3944 return DWARFDIE(); 3945 } 3946 3947 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3948 const DWARFDIE &function) { 3949 assert(IsSubroutine(function)); 3950 for (DWARFDIE context = block; context != function.GetParent(); 3951 context = context.GetParent()) { 3952 assert(!IsSubroutine(context) || context == function); 3953 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3954 return child; 3955 } 3956 } 3957 return DWARFDIE(); 3958 } 3959 3960 clang::DeclContext * 3961 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3962 assert(die.Tag() == DW_TAG_lexical_block); 3963 DWARFDIE containing_function_with_abstract_origin = 3964 GetContainingFunctionWithAbstractOrigin(die); 3965 if (!containing_function_with_abstract_origin) { 3966 return (clang::DeclContext *)ResolveBlockDIE(die); 3967 } 3968 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3969 die, containing_function_with_abstract_origin); 3970 CompilerDeclContext decl_context = 3971 GetDeclContextContainingUIDFromDWARF(child); 3972 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3973 } 3974 3975 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3976 if (die && die.Tag() == DW_TAG_lexical_block) { 3977 clang::BlockDecl *decl = 3978 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3979 3980 if (!decl) { 3981 DWARFDIE decl_context_die; 3982 clang::DeclContext *decl_context = 3983 GetClangDeclContextContainingDIE(die, &decl_context_die); 3984 decl = m_ast.CreateBlockDeclaration(decl_context); 3985 3986 if (decl) 3987 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3988 } 3989 3990 return decl; 3991 } 3992 return nullptr; 3993 } 3994 3995 clang::NamespaceDecl * 3996 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3997 if (die && die.Tag() == DW_TAG_namespace) { 3998 // See if we already parsed this namespace DIE and associated it with a 3999 // uniqued namespace declaration 4000 clang::NamespaceDecl *namespace_decl = 4001 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 4002 if (namespace_decl) 4003 return namespace_decl; 4004 else { 4005 const char *namespace_name = die.GetName(); 4006 clang::DeclContext *containing_decl_ctx = 4007 GetClangDeclContextContainingDIE(die, nullptr); 4008 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 4009 containing_decl_ctx); 4010 Log *log = 4011 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 4012 if (log) { 4013 SymbolFileDWARF *dwarf = die.GetDWARF(); 4014 if (namespace_name) { 4015 dwarf->GetObjectFile()->GetModule()->LogMessage( 4016 log, "ASTContext => %p: 0x%8.8" PRIx64 4017 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 4018 "clang::NamespaceDecl *%p (original = %p)", 4019 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 4020 namespace_name, static_cast<void *>(namespace_decl), 4021 static_cast<void *>(namespace_decl->getOriginalNamespace())); 4022 } else { 4023 dwarf->GetObjectFile()->GetModule()->LogMessage( 4024 log, "ASTContext => %p: 0x%8.8" PRIx64 4025 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 4026 "(original = %p)", 4027 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 4028 static_cast<void *>(namespace_decl), 4029 static_cast<void *>(namespace_decl->getOriginalNamespace())); 4030 } 4031 } 4032 4033 if (namespace_decl) 4034 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 4035 return namespace_decl; 4036 } 4037 } 4038 return nullptr; 4039 } 4040 4041 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 4042 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 4043 SymbolFileDWARF *dwarf = die.GetDWARF(); 4044 4045 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 4046 4047 if (decl_ctx_die_copy) 4048 *decl_ctx_die_copy = decl_ctx_die; 4049 4050 if (decl_ctx_die) { 4051 clang::DeclContext *clang_decl_ctx = 4052 GetClangDeclContextForDIE(decl_ctx_die); 4053 if (clang_decl_ctx) 4054 return clang_decl_ctx; 4055 } 4056 return m_ast.GetTranslationUnitDecl(); 4057 } 4058 4059 clang::DeclContext * 4060 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 4061 if (die) { 4062 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 4063 if (pos != m_die_to_decl_ctx.end()) 4064 return pos->second; 4065 } 4066 return nullptr; 4067 } 4068 4069 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 4070 const DWARFDIE &die) { 4071 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 4072 // There can be many DIEs for a single decl context 4073 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 4074 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 4075 } 4076 4077 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 4078 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 4079 lldb_private::Type *class_type, DWARFDIECollection &failures) { 4080 if (!class_type || !src_class_die || !dst_class_die) 4081 return false; 4082 if (src_class_die.Tag() != dst_class_die.Tag()) 4083 return false; 4084 4085 // We need to complete the class type so we can get all of the method types 4086 // parsed so we can then unique those types to their equivalent counterparts 4087 // in "dst_cu" and "dst_class_die" 4088 class_type->GetFullCompilerType(); 4089 4090 DWARFDIE src_die; 4091 DWARFDIE dst_die; 4092 UniqueCStringMap<DWARFDIE> src_name_to_die; 4093 UniqueCStringMap<DWARFDIE> dst_name_to_die; 4094 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 4095 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 4096 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 4097 src_die = src_die.GetSibling()) { 4098 if (src_die.Tag() == DW_TAG_subprogram) { 4099 // Make sure this is a declaration and not a concrete instance by looking 4100 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4101 // are placed inside the class definitions and shouldn't be included in 4102 // the list of things are are tracking here. 4103 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4104 const char *src_name = src_die.GetMangledName(); 4105 if (src_name) { 4106 ConstString src_const_name(src_name); 4107 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4108 src_name_to_die_artificial.Append(src_const_name, src_die); 4109 else 4110 src_name_to_die.Append(src_const_name, src_die); 4111 } 4112 } 4113 } 4114 } 4115 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 4116 dst_die = dst_die.GetSibling()) { 4117 if (dst_die.Tag() == DW_TAG_subprogram) { 4118 // Make sure this is a declaration and not a concrete instance by looking 4119 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4120 // are placed inside the class definitions and shouldn't be included in 4121 // the list of things are are tracking here. 4122 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4123 const char *dst_name = dst_die.GetMangledName(); 4124 if (dst_name) { 4125 ConstString dst_const_name(dst_name); 4126 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4127 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 4128 else 4129 dst_name_to_die.Append(dst_const_name, dst_die); 4130 } 4131 } 4132 } 4133 } 4134 const uint32_t src_size = src_name_to_die.GetSize(); 4135 const uint32_t dst_size = dst_name_to_die.GetSize(); 4136 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 4137 // DWARF_LOG_TYPE_COMPLETION)); 4138 4139 // Is everything kosher so we can go through the members at top speed? 4140 bool fast_path = true; 4141 4142 if (src_size != dst_size) { 4143 if (src_size != 0 && dst_size != 0) { 4144 if (log) 4145 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 4146 "but they didn't have the same size (src=%d, dst=%d)", 4147 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4148 src_size, dst_size); 4149 } 4150 4151 fast_path = false; 4152 } 4153 4154 uint32_t idx; 4155 4156 if (fast_path) { 4157 for (idx = 0; idx < src_size; ++idx) { 4158 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4159 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4160 4161 if (src_die.Tag() != dst_die.Tag()) { 4162 if (log) 4163 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4164 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 4165 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4166 src_die.GetOffset(), src_die.GetTagAsCString(), 4167 dst_die.GetOffset(), dst_die.GetTagAsCString()); 4168 fast_path = false; 4169 } 4170 4171 const char *src_name = src_die.GetMangledName(); 4172 const char *dst_name = dst_die.GetMangledName(); 4173 4174 // Make sure the names match 4175 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 4176 continue; 4177 4178 if (log) 4179 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4180 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 4181 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4182 src_die.GetOffset(), src_name, dst_die.GetOffset(), 4183 dst_name); 4184 4185 fast_path = false; 4186 } 4187 } 4188 4189 DWARFASTParserClang *src_dwarf_ast_parser = 4190 (DWARFASTParserClang *)src_die.GetDWARFParser(); 4191 DWARFASTParserClang *dst_dwarf_ast_parser = 4192 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 4193 4194 // Now do the work of linking the DeclContexts and Types. 4195 if (fast_path) { 4196 // We can do this quickly. Just run across the tables index-for-index since 4197 // we know each node has matching names and tags. 4198 for (idx = 0; idx < src_size; ++idx) { 4199 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4200 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4201 4202 clang::DeclContext *src_decl_ctx = 4203 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4204 if (src_decl_ctx) { 4205 if (log) 4206 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4207 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4208 dst_die.GetOffset()); 4209 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4210 } else { 4211 if (log) 4212 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4213 "0x%8.8x, but none was found", 4214 src_die.GetOffset(), dst_die.GetOffset()); 4215 } 4216 4217 Type *src_child_type = 4218 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4219 if (src_child_type) { 4220 if (log) 4221 log->Printf( 4222 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4223 static_cast<void *>(src_child_type), src_child_type->GetID(), 4224 src_die.GetOffset(), dst_die.GetOffset()); 4225 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4226 } else { 4227 if (log) 4228 log->Printf("warning: tried to unique lldb_private::Type from " 4229 "0x%8.8x for 0x%8.8x, but none was found", 4230 src_die.GetOffset(), dst_die.GetOffset()); 4231 } 4232 } 4233 } else { 4234 // We must do this slowly. For each member of the destination, look 4235 // up a member in the source with the same name, check its tag, and 4236 // unique them if everything matches up. Report failures. 4237 4238 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4239 src_name_to_die.Sort(); 4240 4241 for (idx = 0; idx < dst_size; ++idx) { 4242 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4243 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4244 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4245 4246 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4247 clang::DeclContext *src_decl_ctx = 4248 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4249 if (src_decl_ctx) { 4250 if (log) 4251 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4252 static_cast<void *>(src_decl_ctx), 4253 src_die.GetOffset(), dst_die.GetOffset()); 4254 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4255 } else { 4256 if (log) 4257 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4258 "for 0x%8.8x, but none was found", 4259 src_die.GetOffset(), dst_die.GetOffset()); 4260 } 4261 4262 Type *src_child_type = 4263 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4264 if (src_child_type) { 4265 if (log) 4266 log->Printf("uniquing type %p (uid=0x%" PRIx64 4267 ") from 0x%8.8x for 0x%8.8x", 4268 static_cast<void *>(src_child_type), 4269 src_child_type->GetID(), src_die.GetOffset(), 4270 dst_die.GetOffset()); 4271 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4272 src_child_type; 4273 } else { 4274 if (log) 4275 log->Printf("warning: tried to unique lldb_private::Type from " 4276 "0x%8.8x for 0x%8.8x, but none was found", 4277 src_die.GetOffset(), dst_die.GetOffset()); 4278 } 4279 } else { 4280 if (log) 4281 log->Printf("warning: couldn't find a match for 0x%8.8x", 4282 dst_die.GetOffset()); 4283 4284 failures.Append(dst_die); 4285 } 4286 } 4287 } 4288 } 4289 4290 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4291 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4292 4293 if (src_size_artificial && dst_size_artificial) { 4294 dst_name_to_die_artificial.Sort(); 4295 4296 for (idx = 0; idx < src_size_artificial; ++idx) { 4297 ConstString src_name_artificial = 4298 src_name_to_die_artificial.GetCStringAtIndex(idx); 4299 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4300 dst_die = 4301 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4302 4303 if (dst_die) { 4304 // Both classes have the artificial types, link them 4305 clang::DeclContext *src_decl_ctx = 4306 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4307 if (src_decl_ctx) { 4308 if (log) 4309 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4310 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4311 dst_die.GetOffset()); 4312 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4313 } else { 4314 if (log) 4315 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4316 "for 0x%8.8x, but none was found", 4317 src_die.GetOffset(), dst_die.GetOffset()); 4318 } 4319 4320 Type *src_child_type = 4321 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4322 if (src_child_type) { 4323 if (log) 4324 log->Printf( 4325 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4326 static_cast<void *>(src_child_type), src_child_type->GetID(), 4327 src_die.GetOffset(), dst_die.GetOffset()); 4328 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4329 } else { 4330 if (log) 4331 log->Printf("warning: tried to unique lldb_private::Type from " 4332 "0x%8.8x for 0x%8.8x, but none was found", 4333 src_die.GetOffset(), dst_die.GetOffset()); 4334 } 4335 } 4336 } 4337 } 4338 4339 if (dst_size_artificial) { 4340 for (idx = 0; idx < dst_size_artificial; ++idx) { 4341 ConstString dst_name_artificial = 4342 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4343 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4344 if (log) 4345 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4346 "method '%s'", 4347 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4348 4349 failures.Append(dst_die); 4350 } 4351 } 4352 4353 return (failures.Size() != 0); 4354 } 4355