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