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