1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include <stdlib.h> 11 12 #include "DWARFASTParserClang.h" 13 #include "DWARFDIE.h" 14 #include "DWARFDIECollection.h" 15 #include "DWARFDebugInfo.h" 16 #include "DWARFDeclContext.h" 17 #include "DWARFDefines.h" 18 #include "SymbolFileDWARF.h" 19 #include "SymbolFileDWARFDwo.h" 20 #include "SymbolFileDWARFDebugMap.h" 21 #include "UniqueDWARFASTType.h" 22 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/ClangASTImporter.h" 28 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 29 #include "lldb/Symbol/ClangUtil.h" 30 #include "lldb/Symbol/CompileUnit.h" 31 #include "lldb/Symbol/Function.h" 32 #include "lldb/Symbol/ObjectFile.h" 33 #include "lldb/Symbol/SymbolVendor.h" 34 #include "lldb/Symbol/TypeList.h" 35 #include "lldb/Symbol/TypeMap.h" 36 #include "lldb/Target/Language.h" 37 #include "lldb/Utility/LLDBAssert.h" 38 #include "lldb/Utility/Log.h" 39 #include "lldb/Utility/StreamString.h" 40 41 #include "clang/AST/CXXInheritance.h" 42 #include "clang/AST/DeclCXX.h" 43 #include "clang/AST/DeclObjC.h" 44 #include "clang/AST/DeclTemplate.h" 45 46 #include <map> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 struct BitfieldInfo { 91 uint64_t bit_size; 92 uint64_t bit_offset; 93 94 BitfieldInfo() 95 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 96 97 void Clear() { 98 bit_size = LLDB_INVALID_ADDRESS; 99 bit_offset = LLDB_INVALID_ADDRESS; 100 } 101 102 bool IsValid() const { 103 return (bit_size != LLDB_INVALID_ADDRESS) && 104 (bit_offset != LLDB_INVALID_ADDRESS); 105 } 106 107 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 108 if (IsValid()) { 109 // This bitfield info is valid, so any subsequent bitfields must not 110 // overlap and must be at a higher bit offset than any previous bitfield 111 // + size. 112 return (bit_size + bit_offset) <= next_bit_offset; 113 } else { 114 // If the this BitfieldInfo is not valid, then any offset isOK 115 return true; 116 } 117 } 118 }; 119 120 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 121 if (!m_clang_ast_importer_ap) { 122 m_clang_ast_importer_ap.reset(new ClangASTImporter); 123 } 124 return *m_clang_ast_importer_ap; 125 } 126 127 /// Detect a forward declaration that is nested in a DW_TAG_module. 128 static bool isClangModuleFwdDecl(const DWARFDIE &Die) { 129 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 130 return false; 131 auto Parent = Die.GetParent(); 132 while (Parent.IsValid()) { 133 if (Parent.Tag() == DW_TAG_module) 134 return true; 135 Parent = Parent.GetParent(); 136 } 137 return false; 138 } 139 140 TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 141 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 142 if (!dwo_module_sp) 143 return TypeSP(); 144 145 // This type comes from an external DWO module. 146 std::vector<CompilerContext> dwo_context; 147 die.GetDWOContext(dwo_context); 148 TypeMap dwo_types; 149 150 if (!dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 151 dwo_types)) { 152 if (!isClangModuleFwdDecl(die)) 153 return TypeSP(); 154 155 // Since this this type is defined in one of the Clang modules imported by 156 // this symbol file, search all of them. 157 auto *SymFile = die.GetCU()->GetSymbolFileDWARF(); 158 for (const auto &NameModule : SymFile->getExternalTypeModules()) { 159 if (!NameModule.second) 160 continue; 161 SymbolVendor *SymVendor = NameModule.second->GetSymbolVendor(); 162 if (SymVendor->FindTypes(dwo_context, true, dwo_types)) 163 break; 164 } 165 } 166 167 const size_t num_dwo_types = dwo_types.GetSize(); 168 if (num_dwo_types != 1) 169 return TypeSP(); 170 171 // We found a real definition for this type in the Clang module, so lets use 172 // it and cache the fact that we found a complete type for this die. 173 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 174 if (!dwo_type_sp) 175 return TypeSP(); 176 177 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 178 179 lldb_private::CompilerType type = 180 GetClangASTImporter().CopyType(m_ast, dwo_type); 181 182 if (!type) 183 return TypeSP(); 184 185 SymbolFileDWARF *dwarf = die.GetDWARF(); 186 TypeSP type_sp(new Type( 187 die.GetID(), dwarf, dwo_type_sp->GetName(), dwo_type_sp->GetByteSize(), 188 NULL, LLDB_INVALID_UID, Type::eEncodingInvalid, 189 &dwo_type_sp->GetDeclaration(), type, Type::eResolveStateForward)); 190 191 dwarf->GetTypeList()->Insert(type_sp); 192 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 193 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 194 if (tag_decl) 195 LinkDeclContextToDIE(tag_decl, die); 196 else { 197 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 198 if (defn_decl_ctx) 199 LinkDeclContextToDIE(defn_decl_ctx, die); 200 } 201 202 return type_sp; 203 } 204 205 static void CompleteExternalTagDeclType(ClangASTImporter &ast_importer, 206 clang::DeclContext *decl_ctx, 207 DWARFDIE die, 208 const char *type_name_cstr) { 209 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 210 if (!tag_decl_ctx) 211 return; 212 213 // If this type was not imported from an external AST, there's nothing to do. 214 CompilerType type = ClangASTContext::GetTypeForDecl(tag_decl_ctx); 215 if (!type || !ast_importer.CanImport(type)) 216 return; 217 218 auto qual_type = ClangUtil::GetQualType(type); 219 if (!ast_importer.RequireCompleteType(qual_type)) { 220 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 221 "Unable to complete the Decl context for DIE '%s' at offset " 222 "0x%8.8x.\nPlease file a bug report.", 223 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 224 // We need to make the type look complete otherwise, we might crash in 225 // Clang when adding children. 226 if (ClangASTContext::StartTagDeclarationDefinition(type)) 227 ClangASTContext::CompleteTagDeclarationDefinition(type); 228 } 229 } 230 231 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 232 const DWARFDIE &die, Log *log, 233 bool *type_is_new_ptr) { 234 TypeSP type_sp; 235 236 if (type_is_new_ptr) 237 *type_is_new_ptr = false; 238 239 AccessType accessibility = eAccessNone; 240 if (die) { 241 SymbolFileDWARF *dwarf = die.GetDWARF(); 242 if (log) { 243 DWARFDIE context_die; 244 clang::DeclContext *context = 245 GetClangDeclContextContainingDIE(die, &context_die); 246 247 dwarf->GetObjectFile()->GetModule()->LogMessage( 248 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 249 "0x%8.8x)) %s name = '%s')", 250 die.GetOffset(), static_cast<void *>(context), 251 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 252 } 253 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 254 TypeList *type_list = dwarf->GetTypeList(); 255 if (type_ptr == NULL) { 256 if (type_is_new_ptr) 257 *type_is_new_ptr = true; 258 259 const dw_tag_t tag = die.Tag(); 260 261 bool is_forward_declaration = false; 262 DWARFAttributes attributes; 263 const char *type_name_cstr = NULL; 264 const char *mangled_name_cstr = NULL; 265 ConstString type_name_const_str; 266 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 267 uint64_t byte_size = 0; 268 Declaration decl; 269 270 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 271 CompilerType clang_type; 272 DWARFFormValue form_value; 273 274 dw_attr_t attr; 275 276 switch (tag) { 277 case DW_TAG_typedef: 278 case DW_TAG_base_type: 279 case DW_TAG_pointer_type: 280 case DW_TAG_reference_type: 281 case DW_TAG_rvalue_reference_type: 282 case DW_TAG_const_type: 283 case DW_TAG_restrict_type: 284 case DW_TAG_volatile_type: 285 case DW_TAG_unspecified_type: { 286 // Set a bit that lets us know that we are currently parsing this 287 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 288 289 const size_t num_attributes = die.GetAttributes(attributes); 290 uint32_t encoding = 0; 291 DWARFFormValue encoding_uid; 292 293 if (num_attributes > 0) { 294 uint32_t i; 295 for (i = 0; i < num_attributes; ++i) { 296 attr = attributes.AttributeAtIndex(i); 297 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 298 switch (attr) { 299 case DW_AT_decl_file: 300 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 301 form_value.Unsigned())); 302 break; 303 case DW_AT_decl_line: 304 decl.SetLine(form_value.Unsigned()); 305 break; 306 case DW_AT_decl_column: 307 decl.SetColumn(form_value.Unsigned()); 308 break; 309 case DW_AT_name: 310 type_name_cstr = form_value.AsCString(); 311 if (type_name_cstr) 312 type_name_const_str.SetCString(type_name_cstr); 313 break; 314 case DW_AT_byte_size: 315 byte_size = form_value.Unsigned(); 316 break; 317 case DW_AT_encoding: 318 encoding = form_value.Unsigned(); 319 break; 320 case DW_AT_type: 321 encoding_uid = form_value; 322 break; 323 default: 324 case DW_AT_sibling: 325 break; 326 } 327 } 328 } 329 } 330 331 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 332 // Try to parse a typedef from the DWO file first as modules can 333 // contain typedef'ed structures that have no names like: 334 // 335 // typedef struct { int a; } Foo; 336 // 337 // In this case we will have a structure with no name and a typedef 338 // named "Foo" that points to this unnamed structure. The name in the 339 // typedef is the only identifier for the struct, so always try to 340 // get typedefs from DWO files if possible. 341 // 342 // The type_sp returned will be empty if the typedef doesn't exist in 343 // a DWO file, so it is cheap to call this function just to check. 344 // 345 // If we don't do this we end up creating a TypeSP that says this is 346 // a typedef to type 0x123 (the DW_AT_type value would be 0x123 in 347 // the DW_TAG_typedef), and this is the unnamed structure type. We 348 // will have a hard time tracking down an unnammed structure type in 349 // the module DWO file, so we make sure we don't get into this 350 // situation by always resolving typedefs from the DWO file. 351 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 352 353 // First make sure that the die that this is typedef'ed to _is_ just 354 // a declaration (DW_AT_declaration == 1), not a full definition 355 // since template types can't be represented in modules since only 356 // concrete instances of templates are ever emitted and modules won't 357 // contain those 358 if (encoding_die && 359 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 360 1) { 361 type_sp = ParseTypeFromDWO(die, log); 362 if (type_sp) 363 return type_sp; 364 } 365 } 366 367 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 368 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 369 encoding_uid.Reference()); 370 371 switch (tag) { 372 default: 373 break; 374 375 case DW_TAG_unspecified_type: 376 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 377 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 378 resolve_state = Type::eResolveStateFull; 379 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 380 break; 381 } 382 // Fall through to base type below in case we can handle the type 383 // there... 384 LLVM_FALLTHROUGH; 385 386 case DW_TAG_base_type: 387 resolve_state = Type::eResolveStateFull; 388 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 389 type_name_cstr, encoding, byte_size * 8); 390 break; 391 392 case DW_TAG_pointer_type: 393 encoding_data_type = Type::eEncodingIsPointerUID; 394 break; 395 case DW_TAG_reference_type: 396 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 397 break; 398 case DW_TAG_rvalue_reference_type: 399 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 400 break; 401 case DW_TAG_typedef: 402 encoding_data_type = Type::eEncodingIsTypedefUID; 403 break; 404 case DW_TAG_const_type: 405 encoding_data_type = Type::eEncodingIsConstUID; 406 break; 407 case DW_TAG_restrict_type: 408 encoding_data_type = Type::eEncodingIsRestrictUID; 409 break; 410 case DW_TAG_volatile_type: 411 encoding_data_type = Type::eEncodingIsVolatileUID; 412 break; 413 } 414 415 if (!clang_type && 416 (encoding_data_type == Type::eEncodingIsPointerUID || 417 encoding_data_type == Type::eEncodingIsTypedefUID) && 418 sc.comp_unit != NULL) { 419 if (tag == DW_TAG_pointer_type) { 420 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 421 422 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 423 // Blocks have a __FuncPtr inside them which is a pointer to a 424 // function of the proper type. 425 426 for (DWARFDIE child_die = target_die.GetFirstChild(); 427 child_die.IsValid(); child_die = child_die.GetSibling()) { 428 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 429 "__FuncPtr")) { 430 DWARFDIE function_pointer_type = 431 child_die.GetReferencedDIE(DW_AT_type); 432 433 if (function_pointer_type) { 434 DWARFDIE function_type = 435 function_pointer_type.GetReferencedDIE(DW_AT_type); 436 437 bool function_type_is_new_pointer; 438 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 439 sc, function_type, log, &function_type_is_new_pointer); 440 441 if (lldb_function_type_sp) { 442 clang_type = m_ast.CreateBlockPointerType( 443 lldb_function_type_sp->GetForwardCompilerType()); 444 encoding_data_type = Type::eEncodingIsUID; 445 encoding_uid.Clear(); 446 resolve_state = Type::eResolveStateFull; 447 } 448 } 449 450 break; 451 } 452 } 453 } 454 } 455 456 bool translation_unit_is_objc = 457 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 458 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 459 460 if (translation_unit_is_objc) { 461 if (type_name_cstr != NULL) { 462 static ConstString g_objc_type_name_id("id"); 463 static ConstString g_objc_type_name_Class("Class"); 464 static ConstString g_objc_type_name_selector("SEL"); 465 466 if (type_name_const_str == g_objc_type_name_id) { 467 if (log) 468 dwarf->GetObjectFile()->GetModule()->LogMessage( 469 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 470 "is Objective-C 'id' built-in type.", 471 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 472 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 473 encoding_data_type = Type::eEncodingIsUID; 474 encoding_uid.Clear(); 475 resolve_state = Type::eResolveStateFull; 476 477 } else if (type_name_const_str == g_objc_type_name_Class) { 478 if (log) 479 dwarf->GetObjectFile()->GetModule()->LogMessage( 480 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 481 "is Objective-C 'Class' built-in type.", 482 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 483 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 484 encoding_data_type = Type::eEncodingIsUID; 485 encoding_uid.Clear(); 486 resolve_state = Type::eResolveStateFull; 487 } else if (type_name_const_str == g_objc_type_name_selector) { 488 if (log) 489 dwarf->GetObjectFile()->GetModule()->LogMessage( 490 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 491 "is Objective-C 'selector' built-in type.", 492 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 493 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 494 encoding_data_type = Type::eEncodingIsUID; 495 encoding_uid.Clear(); 496 resolve_state = Type::eResolveStateFull; 497 } 498 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 499 encoding_uid.IsValid()) { 500 // Clang sometimes erroneously emits id as objc_object*. In that 501 // case we fix up the type to "id". 502 503 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 504 505 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 506 if (const char *struct_name = encoding_die.GetName()) { 507 if (!strcmp(struct_name, "objc_object")) { 508 if (log) 509 dwarf->GetObjectFile()->GetModule()->LogMessage( 510 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 511 "'%s' is 'objc_object*', which we overrode to " 512 "'id'.", 513 die.GetOffset(), die.GetTagAsCString(), 514 die.GetName()); 515 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 516 encoding_data_type = Type::eEncodingIsUID; 517 encoding_uid.Clear(); 518 resolve_state = Type::eResolveStateFull; 519 } 520 } 521 } 522 } 523 } 524 } 525 526 type_sp.reset( 527 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 528 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 529 &decl, clang_type, resolve_state)); 530 531 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 532 } break; 533 534 case DW_TAG_structure_type: 535 case DW_TAG_union_type: 536 case DW_TAG_class_type: { 537 // Set a bit that lets us know that we are currently parsing this 538 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 539 bool byte_size_valid = false; 540 541 LanguageType class_language = eLanguageTypeUnknown; 542 bool is_complete_objc_class = false; 543 size_t calling_convention 544 = llvm::dwarf::CallingConvention::DW_CC_normal; 545 546 const size_t num_attributes = die.GetAttributes(attributes); 547 if (num_attributes > 0) { 548 uint32_t i; 549 for (i = 0; i < num_attributes; ++i) { 550 attr = attributes.AttributeAtIndex(i); 551 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 552 switch (attr) { 553 case DW_AT_decl_file: 554 decl.SetFile( 555 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 556 form_value.Unsigned())); 557 break; 558 559 case DW_AT_decl_line: 560 decl.SetLine(form_value.Unsigned()); 561 break; 562 563 case DW_AT_decl_column: 564 decl.SetColumn(form_value.Unsigned()); 565 break; 566 567 case DW_AT_name: 568 type_name_cstr = form_value.AsCString(); 569 type_name_const_str.SetCString(type_name_cstr); 570 break; 571 572 case DW_AT_byte_size: 573 byte_size = form_value.Unsigned(); 574 byte_size_valid = true; 575 break; 576 577 case DW_AT_accessibility: 578 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 579 break; 580 581 case DW_AT_declaration: 582 is_forward_declaration = form_value.Boolean(); 583 break; 584 585 case DW_AT_APPLE_runtime_class: 586 class_language = (LanguageType)form_value.Signed(); 587 break; 588 589 case DW_AT_APPLE_objc_complete_type: 590 is_complete_objc_class = form_value.Signed(); 591 break; 592 case DW_AT_calling_convention: 593 calling_convention = form_value.Unsigned(); 594 break; 595 596 case DW_AT_allocated: 597 case DW_AT_associated: 598 case DW_AT_data_location: 599 case DW_AT_description: 600 case DW_AT_start_scope: 601 case DW_AT_visibility: 602 default: 603 case DW_AT_sibling: 604 break; 605 } 606 } 607 } 608 } 609 610 // UniqueDWARFASTType is large, so don't create a local variables on 611 // the stack, put it on the heap. This function is often called 612 // recursively and clang isn't good and sharing the stack space for 613 // variables in different blocks. 614 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 615 new UniqueDWARFASTType()); 616 617 ConstString unique_typename(type_name_const_str); 618 Declaration unique_decl(decl); 619 620 if (type_name_const_str) { 621 LanguageType die_language = die.GetLanguage(); 622 if (Language::LanguageIsCPlusPlus(die_language)) { 623 // For C++, we rely solely upon the one definition rule that says 624 // only one thing can exist at a given decl context. We ignore the 625 // file and line that things are declared on. 626 std::string qualified_name; 627 if (die.GetQualifiedName(qualified_name)) 628 unique_typename = ConstString(qualified_name); 629 unique_decl.Clear(); 630 } 631 632 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 633 unique_typename, die, unique_decl, 634 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 635 type_sp = unique_ast_entry_ap->m_type_sp; 636 if (type_sp) { 637 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 638 return type_sp; 639 } 640 } 641 } 642 643 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 644 DW_TAG_value_to_name(tag), type_name_cstr); 645 646 int tag_decl_kind = -1; 647 AccessType default_accessibility = eAccessNone; 648 if (tag == DW_TAG_structure_type) { 649 tag_decl_kind = clang::TTK_Struct; 650 default_accessibility = eAccessPublic; 651 } else if (tag == DW_TAG_union_type) { 652 tag_decl_kind = clang::TTK_Union; 653 default_accessibility = eAccessPublic; 654 } else if (tag == DW_TAG_class_type) { 655 tag_decl_kind = clang::TTK_Class; 656 default_accessibility = eAccessPrivate; 657 } 658 659 if (byte_size_valid && byte_size == 0 && type_name_cstr && 660 die.HasChildren() == false && 661 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 662 // Work around an issue with clang at the moment where forward 663 // declarations for objective C classes are emitted as: 664 // DW_TAG_structure_type [2] 665 // DW_AT_name( "ForwardObjcClass" ) 666 // DW_AT_byte_size( 0x00 ) 667 // DW_AT_decl_file( "..." ) 668 // DW_AT_decl_line( 1 ) 669 // 670 // Note that there is no DW_AT_declaration and there are no children, 671 // and the byte size is zero. 672 is_forward_declaration = true; 673 } 674 675 if (class_language == eLanguageTypeObjC || 676 class_language == eLanguageTypeObjC_plus_plus) { 677 if (!is_complete_objc_class && 678 die.Supports_DW_AT_APPLE_objc_complete_type()) { 679 // We have a valid eSymbolTypeObjCClass class symbol whose name 680 // matches the current objective C class that we are trying to find 681 // and this DIE isn't the complete definition (we checked 682 // is_complete_objc_class above and know it is false), so the real 683 // definition is in here somewhere 684 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 685 die, type_name_const_str, true); 686 687 if (!type_sp) { 688 SymbolFileDWARFDebugMap *debug_map_symfile = 689 dwarf->GetDebugMapSymfile(); 690 if (debug_map_symfile) { 691 // We weren't able to find a full declaration in this DWARF, 692 // see if we have a declaration anywhere else... 693 type_sp = 694 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 695 die, type_name_const_str, true); 696 } 697 } 698 699 if (type_sp) { 700 if (log) { 701 dwarf->GetObjectFile()->GetModule()->LogMessage( 702 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 703 "incomplete objc type, complete type is 0x%8.8" PRIx64, 704 static_cast<void *>(this), die.GetOffset(), 705 DW_TAG_value_to_name(tag), type_name_cstr, 706 type_sp->GetID()); 707 } 708 709 // We found a real definition for this type elsewhere so lets use 710 // it and cache the fact that we found a complete type for this 711 // die 712 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 713 return type_sp; 714 } 715 } 716 } 717 718 if (is_forward_declaration) { 719 // We have a forward declaration to a type and we need to try and 720 // find a full declaration. We look in the current type index just in 721 // case we have a forward declaration followed by an actual 722 // declarations in the DWARF. If this fails, we need to look 723 // elsewhere... 724 if (log) { 725 dwarf->GetObjectFile()->GetModule()->LogMessage( 726 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 727 "forward declaration, trying to find complete type", 728 static_cast<void *>(this), die.GetOffset(), 729 DW_TAG_value_to_name(tag), type_name_cstr); 730 } 731 732 // See if the type comes from a DWO module and if so, track down that 733 // type. 734 type_sp = ParseTypeFromDWO(die, log); 735 if (type_sp) 736 return type_sp; 737 738 DWARFDeclContext die_decl_ctx; 739 die.GetDWARFDeclContext(die_decl_ctx); 740 741 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 742 // type_name_const_str); 743 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 744 745 if (!type_sp) { 746 SymbolFileDWARFDebugMap *debug_map_symfile = 747 dwarf->GetDebugMapSymfile(); 748 if (debug_map_symfile) { 749 // We weren't able to find a full declaration in this DWARF, see 750 // if we have a declaration anywhere else... 751 type_sp = 752 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 753 die_decl_ctx); 754 } 755 } 756 757 if (type_sp) { 758 if (log) { 759 dwarf->GetObjectFile()->GetModule()->LogMessage( 760 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 761 "forward declaration, complete type is 0x%8.8" PRIx64, 762 static_cast<void *>(this), die.GetOffset(), 763 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 764 } 765 766 // We found a real definition for this type elsewhere so lets use 767 // it and cache the fact that we found a complete type for this die 768 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 769 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 770 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 771 if (defn_decl_ctx) 772 LinkDeclContextToDIE(defn_decl_ctx, die); 773 return type_sp; 774 } 775 } 776 assert(tag_decl_kind != -1); 777 bool clang_type_was_created = false; 778 clang_type.SetCompilerType( 779 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 780 if (!clang_type) { 781 clang::DeclContext *decl_ctx = 782 GetClangDeclContextContainingDIE(die, nullptr); 783 784 // If your decl context is a record that was imported from another 785 // AST context (in the gmodules case), we need to make sure the type 786 // backing the Decl is complete before adding children to it. This is 787 // not an issue in the non-gmodules case because the debug info will 788 // always contain a full definition of parent types in that case. 789 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die, 790 type_name_cstr); 791 792 if (accessibility == eAccessNone && decl_ctx) { 793 // Check the decl context that contains this class/struct/union. If 794 // it is a class we must give it an accessibility. 795 const clang::Decl::Kind containing_decl_kind = 796 decl_ctx->getDeclKind(); 797 if (DeclKindIsCXXClass(containing_decl_kind)) 798 accessibility = default_accessibility; 799 } 800 801 ClangASTMetadata metadata; 802 metadata.SetUserID(die.GetID()); 803 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 804 805 if (type_name_cstr && strchr(type_name_cstr, '<')) { 806 ClangASTContext::TemplateParameterInfos template_param_infos; 807 if (ParseTemplateParameterInfos(die, template_param_infos)) { 808 clang::ClassTemplateDecl *class_template_decl = 809 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 810 type_name_cstr, tag_decl_kind, 811 template_param_infos); 812 if (!class_template_decl) { 813 if (log) { 814 dwarf->GetObjectFile()->GetModule()->LogMessage( 815 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 816 "clang::ClassTemplateDecl failed to return a decl.", 817 static_cast<void *>(this), die.GetOffset(), 818 DW_TAG_value_to_name(tag), type_name_cstr); 819 } 820 return TypeSP(); 821 } 822 823 clang::ClassTemplateSpecializationDecl 824 *class_specialization_decl = 825 m_ast.CreateClassTemplateSpecializationDecl( 826 decl_ctx, class_template_decl, tag_decl_kind, 827 template_param_infos); 828 clang_type = m_ast.CreateClassTemplateSpecializationType( 829 class_specialization_decl); 830 clang_type_was_created = true; 831 832 m_ast.SetMetadata(class_template_decl, metadata); 833 m_ast.SetMetadata(class_specialization_decl, metadata); 834 } 835 } 836 837 if (!clang_type_was_created) { 838 clang_type_was_created = true; 839 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 840 type_name_cstr, tag_decl_kind, 841 class_language, &metadata); 842 } 843 } 844 845 // Store a forward declaration to this class type in case any 846 // parameters in any class methods need it for the clang types for 847 // function prototypes. 848 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 849 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 850 byte_size, NULL, LLDB_INVALID_UID, 851 Type::eEncodingIsUID, &decl, clang_type, 852 Type::eResolveStateForward)); 853 854 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 855 856 // Add our type to the unique type map so we don't end up creating many 857 // copies of the same type over and over in the ASTContext for our 858 // module 859 unique_ast_entry_ap->m_type_sp = type_sp; 860 unique_ast_entry_ap->m_die = die; 861 unique_ast_entry_ap->m_declaration = unique_decl; 862 unique_ast_entry_ap->m_byte_size = byte_size; 863 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 864 *unique_ast_entry_ap); 865 866 if (is_forward_declaration && die.HasChildren()) { 867 // Check to see if the DIE actually has a definition, some version of 868 // GCC will 869 // emit DIEs with DW_AT_declaration set to true, but yet still have 870 // subprogram, members, or inheritance, so we can't trust it 871 DWARFDIE child_die = die.GetFirstChild(); 872 while (child_die) { 873 switch (child_die.Tag()) { 874 case DW_TAG_inheritance: 875 case DW_TAG_subprogram: 876 case DW_TAG_member: 877 case DW_TAG_APPLE_property: 878 case DW_TAG_class_type: 879 case DW_TAG_structure_type: 880 case DW_TAG_enumeration_type: 881 case DW_TAG_typedef: 882 case DW_TAG_union_type: 883 child_die.Clear(); 884 is_forward_declaration = false; 885 break; 886 default: 887 child_die = child_die.GetSibling(); 888 break; 889 } 890 } 891 } 892 893 if (!is_forward_declaration) { 894 // Always start the definition for a class type so that if the class 895 // has child classes or types that require the class to be created 896 // for use as their decl contexts the class will be ready to accept 897 // these child definitions. 898 if (die.HasChildren() == false) { 899 // No children for this struct/union/class, lets finish it 900 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 901 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 902 } else { 903 dwarf->GetObjectFile()->GetModule()->ReportError( 904 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 905 "definition.\nPlease file a bug and attach the file at the " 906 "start of this error message", 907 die.GetOffset(), type_name_cstr); 908 } 909 910 if (tag == DW_TAG_structure_type) // this only applies in C 911 { 912 clang::RecordDecl *record_decl = 913 ClangASTContext::GetAsRecordDecl(clang_type); 914 915 if (record_decl) { 916 GetClangASTImporter().InsertRecordDecl( 917 record_decl, ClangASTImporter::LayoutInfo()); 918 } 919 } 920 } else if (clang_type_was_created) { 921 // Start the definition if the class is not objective C since the 922 // underlying decls respond to isCompleteDefinition(). Objective 923 // C decls don't respond to isCompleteDefinition() so we can't 924 // start the declaration definition right away. For C++ 925 // class/union/structs we want to start the definition in case the 926 // class is needed as the declaration context for a contained class 927 // or type without the need to complete that type.. 928 929 if (class_language != eLanguageTypeObjC && 930 class_language != eLanguageTypeObjC_plus_plus) 931 ClangASTContext::StartTagDeclarationDefinition(clang_type); 932 933 // Leave this as a forward declaration until we need to know the 934 // details of the type. lldb_private::Type will automatically call 935 // the SymbolFile virtual function 936 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 937 // needs to be defined. 938 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 939 ClangUtil::RemoveFastQualifiers(clang_type) 940 .GetOpaqueQualType()) && 941 "Type already in the forward declaration map!"); 942 // Can't assume m_ast.GetSymbolFile() is actually a 943 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 944 // binaries. 945 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 946 clang_type.GetOpaqueQualType(); 947 dwarf->GetForwardDeclClangTypeToDie() 948 [ClangUtil::RemoveFastQualifiers(clang_type) 949 .GetOpaqueQualType()] = die.GetDIERef(); 950 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 951 } 952 } 953 954 // If we made a clang type, set the trivial abi if applicable: We only 955 // do this for pass by value - which implies the Trivial ABI. There 956 // isn't a way to assert that something that would normally be pass by 957 // value is pass by reference, so we ignore that attribute if set. 958 if (calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 959 clang::CXXRecordDecl *record_decl = 960 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 961 if (record_decl) { 962 record_decl->setHasTrivialSpecialMemberForCall(); 963 } 964 } 965 966 } break; 967 968 case DW_TAG_enumeration_type: { 969 // Set a bit that lets us know that we are currently parsing this 970 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 971 972 bool is_scoped = false; 973 DWARFFormValue encoding_form; 974 975 const size_t num_attributes = die.GetAttributes(attributes); 976 if (num_attributes > 0) { 977 uint32_t i; 978 979 for (i = 0; i < num_attributes; ++i) { 980 attr = attributes.AttributeAtIndex(i); 981 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 982 switch (attr) { 983 case DW_AT_decl_file: 984 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 985 form_value.Unsigned())); 986 break; 987 case DW_AT_decl_line: 988 decl.SetLine(form_value.Unsigned()); 989 break; 990 case DW_AT_decl_column: 991 decl.SetColumn(form_value.Unsigned()); 992 break; 993 case DW_AT_name: 994 type_name_cstr = form_value.AsCString(); 995 type_name_const_str.SetCString(type_name_cstr); 996 break; 997 case DW_AT_type: 998 encoding_form = form_value; 999 break; 1000 case DW_AT_byte_size: 1001 byte_size = form_value.Unsigned(); 1002 break; 1003 case DW_AT_accessibility: 1004 break; // accessibility = 1005 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1006 case DW_AT_declaration: 1007 is_forward_declaration = form_value.Boolean(); 1008 break; 1009 case DW_AT_enum_class: 1010 is_scoped = form_value.Boolean(); 1011 break; 1012 case DW_AT_allocated: 1013 case DW_AT_associated: 1014 case DW_AT_bit_stride: 1015 case DW_AT_byte_stride: 1016 case DW_AT_data_location: 1017 case DW_AT_description: 1018 case DW_AT_start_scope: 1019 case DW_AT_visibility: 1020 case DW_AT_specification: 1021 case DW_AT_abstract_origin: 1022 case DW_AT_sibling: 1023 break; 1024 } 1025 } 1026 } 1027 1028 if (is_forward_declaration) { 1029 type_sp = ParseTypeFromDWO(die, log); 1030 if (type_sp) 1031 return type_sp; 1032 1033 DWARFDeclContext die_decl_ctx; 1034 die.GetDWARFDeclContext(die_decl_ctx); 1035 1036 type_sp = 1037 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1038 1039 if (!type_sp) { 1040 SymbolFileDWARFDebugMap *debug_map_symfile = 1041 dwarf->GetDebugMapSymfile(); 1042 if (debug_map_symfile) { 1043 // We weren't able to find a full declaration in this DWARF, 1044 // see if we have a declaration anywhere else... 1045 type_sp = 1046 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1047 die_decl_ctx); 1048 } 1049 } 1050 1051 if (type_sp) { 1052 if (log) { 1053 dwarf->GetObjectFile()->GetModule()->LogMessage( 1054 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1055 "forward declaration, complete type is 0x%8.8" PRIx64, 1056 static_cast<void *>(this), die.GetOffset(), 1057 DW_TAG_value_to_name(tag), type_name_cstr, 1058 type_sp->GetID()); 1059 } 1060 1061 // We found a real definition for this type elsewhere so lets use 1062 // it and cache the fact that we found a complete type for this 1063 // die 1064 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1065 clang::DeclContext *defn_decl_ctx = 1066 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1067 DIERef(type_sp->GetID(), dwarf))); 1068 if (defn_decl_ctx) 1069 LinkDeclContextToDIE(defn_decl_ctx, die); 1070 return type_sp; 1071 } 1072 } 1073 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1074 DW_TAG_value_to_name(tag), type_name_cstr); 1075 1076 CompilerType enumerator_clang_type; 1077 clang_type.SetCompilerType( 1078 &m_ast, 1079 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1080 if (!clang_type) { 1081 if (encoding_form.IsValid()) { 1082 Type *enumerator_type = 1083 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1084 if (enumerator_type) 1085 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1086 } 1087 1088 if (!enumerator_clang_type) { 1089 if (byte_size > 0) { 1090 enumerator_clang_type = 1091 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1092 NULL, DW_ATE_signed, byte_size * 8); 1093 } else { 1094 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1095 } 1096 } 1097 1098 clang_type = m_ast.CreateEnumerationType( 1099 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1100 decl, enumerator_clang_type, is_scoped); 1101 } else { 1102 enumerator_clang_type = 1103 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1104 } 1105 1106 LinkDeclContextToDIE( 1107 ClangASTContext::GetDeclContextForType(clang_type), die); 1108 1109 type_sp.reset(new Type( 1110 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1111 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1112 clang_type, Type::eResolveStateForward)); 1113 1114 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1115 if (die.HasChildren()) { 1116 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1117 bool is_signed = false; 1118 enumerator_clang_type.IsIntegerType(is_signed); 1119 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1120 type_sp->GetByteSize(), die); 1121 } 1122 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1123 } else { 1124 dwarf->GetObjectFile()->GetModule()->ReportError( 1125 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1126 "definition.\nPlease file a bug and attach the file at the " 1127 "start of this error message", 1128 die.GetOffset(), type_name_cstr); 1129 } 1130 } 1131 } break; 1132 1133 case DW_TAG_inlined_subroutine: 1134 case DW_TAG_subprogram: 1135 case DW_TAG_subroutine_type: { 1136 // Set a bit that lets us know that we are currently parsing this 1137 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1138 1139 DWARFFormValue type_die_form; 1140 bool is_variadic = false; 1141 bool is_inline = false; 1142 bool is_static = false; 1143 bool is_virtual = false; 1144 bool is_explicit = false; 1145 bool is_artificial = false; 1146 bool has_template_params = false; 1147 DWARFFormValue specification_die_form; 1148 DWARFFormValue abstract_origin_die_form; 1149 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1150 1151 unsigned type_quals = 0; 1152 clang::StorageClass storage = 1153 clang::SC_None; //, Extern, Static, PrivateExtern 1154 1155 const size_t num_attributes = die.GetAttributes(attributes); 1156 if (num_attributes > 0) { 1157 uint32_t i; 1158 for (i = 0; i < num_attributes; ++i) { 1159 attr = attributes.AttributeAtIndex(i); 1160 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1161 switch (attr) { 1162 case DW_AT_decl_file: 1163 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1164 form_value.Unsigned())); 1165 break; 1166 case DW_AT_decl_line: 1167 decl.SetLine(form_value.Unsigned()); 1168 break; 1169 case DW_AT_decl_column: 1170 decl.SetColumn(form_value.Unsigned()); 1171 break; 1172 case DW_AT_name: 1173 type_name_cstr = form_value.AsCString(); 1174 type_name_const_str.SetCString(type_name_cstr); 1175 break; 1176 1177 case DW_AT_linkage_name: 1178 case DW_AT_MIPS_linkage_name: 1179 mangled_name_cstr = form_value.AsCString(); 1180 break; 1181 case DW_AT_type: 1182 type_die_form = form_value; 1183 break; 1184 case DW_AT_accessibility: 1185 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1186 break; 1187 case DW_AT_declaration: 1188 break; // is_forward_declaration = form_value.Boolean(); break; 1189 case DW_AT_inline: 1190 is_inline = form_value.Boolean(); 1191 break; 1192 case DW_AT_virtuality: 1193 is_virtual = form_value.Boolean(); 1194 break; 1195 case DW_AT_explicit: 1196 is_explicit = form_value.Boolean(); 1197 break; 1198 case DW_AT_artificial: 1199 is_artificial = form_value.Boolean(); 1200 break; 1201 1202 case DW_AT_external: 1203 if (form_value.Unsigned()) { 1204 if (storage == clang::SC_None) 1205 storage = clang::SC_Extern; 1206 else 1207 storage = clang::SC_PrivateExtern; 1208 } 1209 break; 1210 1211 case DW_AT_specification: 1212 specification_die_form = form_value; 1213 break; 1214 1215 case DW_AT_abstract_origin: 1216 abstract_origin_die_form = form_value; 1217 break; 1218 1219 case DW_AT_object_pointer: 1220 object_pointer_die_offset = form_value.Reference(); 1221 break; 1222 1223 case DW_AT_allocated: 1224 case DW_AT_associated: 1225 case DW_AT_address_class: 1226 case DW_AT_calling_convention: 1227 case DW_AT_data_location: 1228 case DW_AT_elemental: 1229 case DW_AT_entry_pc: 1230 case DW_AT_frame_base: 1231 case DW_AT_high_pc: 1232 case DW_AT_low_pc: 1233 case DW_AT_prototyped: 1234 case DW_AT_pure: 1235 case DW_AT_ranges: 1236 case DW_AT_recursive: 1237 case DW_AT_return_addr: 1238 case DW_AT_segment: 1239 case DW_AT_start_scope: 1240 case DW_AT_static_link: 1241 case DW_AT_trampoline: 1242 case DW_AT_visibility: 1243 case DW_AT_vtable_elem_location: 1244 case DW_AT_description: 1245 case DW_AT_sibling: 1246 break; 1247 } 1248 } 1249 } 1250 } 1251 1252 std::string object_pointer_name; 1253 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1254 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1255 if (object_pointer_die) { 1256 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1257 if (object_pointer_name_cstr) 1258 object_pointer_name = object_pointer_name_cstr; 1259 } 1260 } 1261 1262 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1263 DW_TAG_value_to_name(tag), type_name_cstr); 1264 1265 CompilerType return_clang_type; 1266 Type *func_type = NULL; 1267 1268 if (type_die_form.IsValid()) 1269 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1270 1271 if (func_type) 1272 return_clang_type = func_type->GetForwardCompilerType(); 1273 else 1274 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1275 1276 std::vector<CompilerType> function_param_types; 1277 std::vector<clang::ParmVarDecl *> function_param_decls; 1278 1279 // Parse the function children for the parameters 1280 1281 DWARFDIE decl_ctx_die; 1282 clang::DeclContext *containing_decl_ctx = 1283 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1284 const clang::Decl::Kind containing_decl_kind = 1285 containing_decl_ctx->getDeclKind(); 1286 1287 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1288 // Start off static. This will be set to false in 1289 // ParseChildParameters(...) if we find a "this" parameters as the 1290 // first parameter 1291 if (is_cxx_method) { 1292 is_static = true; 1293 } 1294 1295 if (die.HasChildren()) { 1296 bool skip_artificial = true; 1297 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1298 is_static, is_variadic, has_template_params, 1299 function_param_types, function_param_decls, 1300 type_quals); 1301 } 1302 1303 bool ignore_containing_context = false; 1304 // Check for templatized class member functions. If we had any 1305 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 1306 // the DW_TAG_subprogram DIE, then we can't let this become a method in 1307 // a class. Why? Because templatized functions are only emitted if one 1308 // of the templatized methods is used in the current compile unit and 1309 // we will end up with classes that may or may not include these member 1310 // functions and this means one class won't match another class 1311 // definition and it affects our ability to use a class in the clang 1312 // expression parser. So for the greater good, we currently must not 1313 // allow any template member functions in a class definition. 1314 if (is_cxx_method && has_template_params) { 1315 ignore_containing_context = true; 1316 is_cxx_method = false; 1317 } 1318 1319 // clang_type will get the function prototype clang type after this 1320 // call 1321 clang_type = m_ast.CreateFunctionType( 1322 return_clang_type, function_param_types.data(), 1323 function_param_types.size(), is_variadic, type_quals); 1324 1325 if (type_name_cstr) { 1326 bool type_handled = false; 1327 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1328 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1329 if (objc_method.IsValid(true)) { 1330 CompilerType class_opaque_type; 1331 ConstString class_name(objc_method.GetClassName()); 1332 if (class_name) { 1333 TypeSP complete_objc_class_type_sp( 1334 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1335 DWARFDIE(), class_name, false)); 1336 1337 if (complete_objc_class_type_sp) { 1338 CompilerType type_clang_forward_type = 1339 complete_objc_class_type_sp->GetForwardCompilerType(); 1340 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1341 type_clang_forward_type)) 1342 class_opaque_type = type_clang_forward_type; 1343 } 1344 } 1345 1346 if (class_opaque_type) { 1347 // If accessibility isn't set to anything valid, assume public 1348 // for now... 1349 if (accessibility == eAccessNone) 1350 accessibility = eAccessPublic; 1351 1352 clang::ObjCMethodDecl *objc_method_decl = 1353 m_ast.AddMethodToObjCObjectType( 1354 class_opaque_type, type_name_cstr, clang_type, 1355 accessibility, is_artificial, is_variadic); 1356 type_handled = objc_method_decl != NULL; 1357 if (type_handled) { 1358 LinkDeclContextToDIE( 1359 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1360 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1361 } else { 1362 dwarf->GetObjectFile()->GetModule()->ReportError( 1363 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1364 "please file a bug and attach the file at the start of " 1365 "this error message", 1366 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1367 } 1368 } 1369 } else if (is_cxx_method) { 1370 // Look at the parent of this DIE and see if is is a class or 1371 // struct and see if this is actually a C++ method 1372 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1373 if (class_type) { 1374 bool alternate_defn = false; 1375 if (class_type->GetID() != decl_ctx_die.GetID() || 1376 decl_ctx_die.GetContainingDWOModuleDIE()) { 1377 alternate_defn = true; 1378 1379 // We uniqued the parent class of this function to another 1380 // class so we now need to associate all dies under 1381 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 1382 SymbolFileDWARF *class_symfile = NULL; 1383 DWARFDIE class_type_die; 1384 1385 SymbolFileDWARFDebugMap *debug_map_symfile = 1386 dwarf->GetDebugMapSymfile(); 1387 if (debug_map_symfile) { 1388 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1389 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1390 class_type->GetID())); 1391 class_type_die = class_symfile->DebugInfo()->GetDIE( 1392 DIERef(class_type->GetID(), dwarf)); 1393 } else { 1394 class_symfile = dwarf; 1395 class_type_die = dwarf->DebugInfo()->GetDIE( 1396 DIERef(class_type->GetID(), dwarf)); 1397 } 1398 if (class_type_die) { 1399 DWARFDIECollection failures; 1400 1401 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1402 class_type, failures); 1403 1404 // FIXME do something with these failures that's smarter 1405 // than 1406 // just dropping them on the ground. Unfortunately classes 1407 // don't like having stuff added to them after their 1408 // definitions are complete... 1409 1410 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1411 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1412 type_sp = type_ptr->shared_from_this(); 1413 break; 1414 } 1415 } 1416 } 1417 1418 if (specification_die_form.IsValid()) { 1419 // We have a specification which we are going to base our 1420 // function prototype off of, so we need this type to be 1421 // completed so that the m_die_to_decl_ctx for the method in 1422 // the specification has a valid clang decl context. 1423 class_type->GetForwardCompilerType(); 1424 // If we have a specification, then the function type should 1425 // have been made with the specification and not with this 1426 // die. 1427 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1428 DIERef(specification_die_form)); 1429 clang::DeclContext *spec_clang_decl_ctx = 1430 GetClangDeclContextForDIE(spec_die); 1431 if (spec_clang_decl_ctx) { 1432 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1433 } else { 1434 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1435 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1436 ") has no decl\n", 1437 die.GetID(), specification_die_form.Reference()); 1438 } 1439 type_handled = true; 1440 } else if (abstract_origin_die_form.IsValid()) { 1441 // We have a specification which we are going to base our 1442 // function prototype off of, so we need this type to be 1443 // completed so that the m_die_to_decl_ctx for the method in 1444 // the abstract origin has a valid clang decl context. 1445 class_type->GetForwardCompilerType(); 1446 1447 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1448 DIERef(abstract_origin_die_form)); 1449 clang::DeclContext *abs_clang_decl_ctx = 1450 GetClangDeclContextForDIE(abs_die); 1451 if (abs_clang_decl_ctx) { 1452 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1453 } else { 1454 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1455 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1456 ") has no decl\n", 1457 die.GetID(), abstract_origin_die_form.Reference()); 1458 } 1459 type_handled = true; 1460 } else { 1461 CompilerType class_opaque_type = 1462 class_type->GetForwardCompilerType(); 1463 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1464 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1465 if (!is_static && !die.HasChildren()) { 1466 // We have a C++ member function with no children (this 1467 // pointer!) and clang will get mad if we try and make 1468 // a function that isn't well formed in the DWARF, so 1469 // we will just skip it... 1470 type_handled = true; 1471 } else { 1472 bool add_method = true; 1473 if (alternate_defn) { 1474 // If an alternate definition for the class exists, 1475 // then add the method only if an equivalent is not 1476 // already present. 1477 clang::CXXRecordDecl *record_decl = 1478 m_ast.GetAsCXXRecordDecl( 1479 class_opaque_type.GetOpaqueQualType()); 1480 if (record_decl) { 1481 for (auto method_iter = record_decl->method_begin(); 1482 method_iter != record_decl->method_end(); 1483 method_iter++) { 1484 clang::CXXMethodDecl *method_decl = *method_iter; 1485 if (method_decl->getNameInfo().getAsString() == 1486 std::string(type_name_cstr)) { 1487 if (method_decl->getType() == 1488 ClangUtil::GetQualType(clang_type)) { 1489 add_method = false; 1490 LinkDeclContextToDIE( 1491 ClangASTContext::GetAsDeclContext( 1492 method_decl), 1493 die); 1494 type_handled = true; 1495 1496 break; 1497 } 1498 } 1499 } 1500 } 1501 } 1502 1503 if (add_method) { 1504 llvm::PrettyStackTraceFormat stack_trace( 1505 "SymbolFileDWARF::ParseType() is adding a method " 1506 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1507 type_name_cstr, 1508 class_type->GetName().GetCString(), die.GetID(), 1509 dwarf->GetObjectFile() 1510 ->GetFileSpec() 1511 .GetPath() 1512 .c_str()); 1513 1514 const bool is_attr_used = false; 1515 // Neither GCC 4.2 nor clang++ currently set a valid 1516 // accessibility in the DWARF for C++ methods... 1517 // Default to public for now... 1518 if (accessibility == eAccessNone) 1519 accessibility = eAccessPublic; 1520 1521 clang::CXXMethodDecl *cxx_method_decl = 1522 m_ast.AddMethodToCXXRecordType( 1523 class_opaque_type.GetOpaqueQualType(), 1524 type_name_cstr, mangled_name_cstr, clang_type, 1525 accessibility, is_virtual, is_static, 1526 is_inline, is_explicit, is_attr_used, 1527 is_artificial); 1528 1529 type_handled = cxx_method_decl != NULL; 1530 1531 if (type_handled) { 1532 LinkDeclContextToDIE( 1533 ClangASTContext::GetAsDeclContext( 1534 cxx_method_decl), 1535 die); 1536 1537 ClangASTMetadata metadata; 1538 metadata.SetUserID(die.GetID()); 1539 1540 if (!object_pointer_name.empty()) { 1541 metadata.SetObjectPtrName( 1542 object_pointer_name.c_str()); 1543 if (log) 1544 log->Printf( 1545 "Setting object pointer name: %s on method " 1546 "object %p.\n", 1547 object_pointer_name.c_str(), 1548 static_cast<void *>(cxx_method_decl)); 1549 } 1550 m_ast.SetMetadata(cxx_method_decl, metadata); 1551 } else { 1552 ignore_containing_context = true; 1553 } 1554 } 1555 } 1556 } else { 1557 // We were asked to parse the type for a method in a 1558 // class, yet the class hasn't been asked to complete 1559 // itself through the clang::ExternalASTSource protocol, 1560 // so we need to just have the class complete itself and 1561 // do things the right way, then our 1562 // DIE should then have an entry in the 1563 // dwarf->GetDIEToType() map. First 1564 // we need to modify the dwarf->GetDIEToType() so it 1565 // doesn't think we are trying to parse this DIE 1566 // anymore... 1567 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1568 1569 // Now we get the full type to force our class type to 1570 // complete itself using the clang::ExternalASTSource 1571 // protocol which will parse all base classes and all 1572 // methods (including the method for this DIE). 1573 class_type->GetFullCompilerType(); 1574 1575 // The type for this DIE should have been filled in the 1576 // function call above 1577 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1578 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1579 type_sp = type_ptr->shared_from_this(); 1580 break; 1581 } 1582 1583 // FIXME This is fixing some even uglier behavior but we 1584 // really need to 1585 // uniq the methods of each class as well as the class 1586 // itself. <rdar://problem/11240464> 1587 type_handled = true; 1588 } 1589 } 1590 } 1591 } 1592 } 1593 } 1594 1595 if (!type_handled) { 1596 clang::FunctionDecl *function_decl = nullptr; 1597 1598 if (abstract_origin_die_form.IsValid()) { 1599 DWARFDIE abs_die = 1600 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1601 1602 SymbolContext sc; 1603 1604 if (dwarf->ResolveType(abs_die)) { 1605 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1606 GetCachedClangDeclContextForDIE(abs_die)); 1607 1608 if (function_decl) { 1609 LinkDeclContextToDIE(function_decl, die); 1610 } 1611 } 1612 } 1613 1614 if (!function_decl) { 1615 // We just have a function that isn't part of a class 1616 function_decl = m_ast.CreateFunctionDeclaration( 1617 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1618 : containing_decl_ctx, 1619 type_name_cstr, clang_type, storage, is_inline); 1620 1621 if (has_template_params) { 1622 ClangASTContext::TemplateParameterInfos template_param_infos; 1623 ParseTemplateParameterInfos(die, template_param_infos); 1624 clang::FunctionTemplateDecl *func_template_decl = 1625 m_ast.CreateFunctionTemplateDecl( 1626 containing_decl_ctx, function_decl, type_name_cstr, 1627 template_param_infos); 1628 m_ast.CreateFunctionTemplateSpecializationInfo( 1629 function_decl, func_template_decl, template_param_infos); 1630 } 1631 1632 lldbassert(function_decl); 1633 1634 if (function_decl) { 1635 LinkDeclContextToDIE(function_decl, die); 1636 1637 if (!function_param_decls.empty()) 1638 m_ast.SetFunctionParameters(function_decl, 1639 &function_param_decls.front(), 1640 function_param_decls.size()); 1641 1642 ClangASTMetadata metadata; 1643 metadata.SetUserID(die.GetID()); 1644 1645 if (!object_pointer_name.empty()) { 1646 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1647 if (log) 1648 log->Printf("Setting object pointer name: %s on function " 1649 "object %p.", 1650 object_pointer_name.c_str(), 1651 static_cast<void *>(function_decl)); 1652 } 1653 m_ast.SetMetadata(function_decl, metadata); 1654 } 1655 } 1656 } 1657 } 1658 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1659 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1660 clang_type, Type::eResolveStateFull)); 1661 assert(type_sp.get()); 1662 } break; 1663 1664 case DW_TAG_array_type: { 1665 // Set a bit that lets us know that we are currently parsing this 1666 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1667 1668 DWARFFormValue type_die_form; 1669 int64_t first_index = 0; 1670 uint32_t byte_stride = 0; 1671 uint32_t bit_stride = 0; 1672 bool is_vector = false; 1673 const size_t num_attributes = die.GetAttributes(attributes); 1674 1675 if (num_attributes > 0) { 1676 uint32_t i; 1677 for (i = 0; i < num_attributes; ++i) { 1678 attr = attributes.AttributeAtIndex(i); 1679 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1680 switch (attr) { 1681 case DW_AT_decl_file: 1682 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1683 form_value.Unsigned())); 1684 break; 1685 case DW_AT_decl_line: 1686 decl.SetLine(form_value.Unsigned()); 1687 break; 1688 case DW_AT_decl_column: 1689 decl.SetColumn(form_value.Unsigned()); 1690 break; 1691 case DW_AT_name: 1692 type_name_cstr = form_value.AsCString(); 1693 type_name_const_str.SetCString(type_name_cstr); 1694 break; 1695 1696 case DW_AT_type: 1697 type_die_form = form_value; 1698 break; 1699 case DW_AT_byte_size: 1700 break; // byte_size = form_value.Unsigned(); break; 1701 case DW_AT_byte_stride: 1702 byte_stride = form_value.Unsigned(); 1703 break; 1704 case DW_AT_bit_stride: 1705 bit_stride = form_value.Unsigned(); 1706 break; 1707 case DW_AT_GNU_vector: 1708 is_vector = form_value.Boolean(); 1709 break; 1710 case DW_AT_accessibility: 1711 break; // accessibility = 1712 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1713 case DW_AT_declaration: 1714 break; // is_forward_declaration = form_value.Boolean(); break; 1715 case DW_AT_allocated: 1716 case DW_AT_associated: 1717 case DW_AT_data_location: 1718 case DW_AT_description: 1719 case DW_AT_ordering: 1720 case DW_AT_start_scope: 1721 case DW_AT_visibility: 1722 case DW_AT_specification: 1723 case DW_AT_abstract_origin: 1724 case DW_AT_sibling: 1725 break; 1726 } 1727 } 1728 } 1729 1730 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1731 DW_TAG_value_to_name(tag), type_name_cstr); 1732 1733 DIERef type_die_ref(type_die_form); 1734 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1735 1736 if (element_type) { 1737 auto array_info = ParseChildArrayInfo(die); 1738 if (array_info) { 1739 first_index = array_info->first_index; 1740 byte_stride = array_info->byte_stride; 1741 bit_stride = array_info->bit_stride; 1742 } 1743 if (byte_stride == 0 && bit_stride == 0) 1744 byte_stride = element_type->GetByteSize(); 1745 CompilerType array_element_type = 1746 element_type->GetForwardCompilerType(); 1747 1748 if (ClangASTContext::IsCXXClassType(array_element_type) && 1749 array_element_type.GetCompleteType() == false) { 1750 ModuleSP module_sp = die.GetModule(); 1751 if (module_sp) { 1752 if (die.GetCU()->GetProducer() == eProducerClang) 1753 module_sp->ReportError( 1754 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1755 "class/union/struct element type DIE 0x%8.8x that is a " 1756 "forward declaration, not a complete definition.\nTry " 1757 "compiling the source file with -fstandalone-debug or " 1758 "disable -gmodules", 1759 die.GetOffset(), type_die_ref.die_offset); 1760 else 1761 module_sp->ReportError( 1762 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1763 "class/union/struct element type DIE 0x%8.8x that is a " 1764 "forward declaration, not a complete definition.\nPlease " 1765 "file a bug against the compiler and include the " 1766 "preprocessed output for %s", 1767 die.GetOffset(), type_die_ref.die_offset, 1768 die.GetLLDBCompileUnit() 1769 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1770 : "the source file"); 1771 } 1772 1773 // We have no choice other than to pretend that the element class 1774 // type is complete. If we don't do this, clang will crash when 1775 // trying to layout the class. Since we provide layout 1776 // assistance, all ivars in this class and other classes will be 1777 // fine, this is the best we can do short of crashing. 1778 if (ClangASTContext::StartTagDeclarationDefinition( 1779 array_element_type)) { 1780 ClangASTContext::CompleteTagDeclarationDefinition( 1781 array_element_type); 1782 } else { 1783 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1784 "start its definition.\nPlease file a " 1785 "bug and attach the file at the start " 1786 "of this error message", 1787 type_die_ref.die_offset); 1788 } 1789 } 1790 1791 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1792 if (array_info && array_info->element_orders.size() > 0) { 1793 uint64_t num_elements = 0; 1794 auto end = array_info->element_orders.rend(); 1795 for (auto pos = array_info->element_orders.rbegin(); pos != end; 1796 ++pos) { 1797 num_elements = *pos; 1798 clang_type = m_ast.CreateArrayType(array_element_type, 1799 num_elements, is_vector); 1800 array_element_type = clang_type; 1801 array_element_bit_stride = 1802 num_elements ? array_element_bit_stride * num_elements 1803 : array_element_bit_stride; 1804 } 1805 } else { 1806 clang_type = 1807 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1808 } 1809 ConstString empty_name; 1810 type_sp.reset(new Type( 1811 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1812 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1813 &decl, clang_type, Type::eResolveStateFull)); 1814 type_sp->SetEncodingType(element_type); 1815 m_ast.SetMetadataAsUserID(clang_type.GetOpaqueQualType(), 1816 die.GetID()); 1817 } 1818 } 1819 } break; 1820 1821 case DW_TAG_ptr_to_member_type: { 1822 DWARFFormValue type_die_form; 1823 DWARFFormValue containing_type_die_form; 1824 1825 const size_t num_attributes = die.GetAttributes(attributes); 1826 1827 if (num_attributes > 0) { 1828 uint32_t i; 1829 for (i = 0; i < num_attributes; ++i) { 1830 attr = attributes.AttributeAtIndex(i); 1831 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1832 switch (attr) { 1833 case DW_AT_type: 1834 type_die_form = form_value; 1835 break; 1836 case DW_AT_containing_type: 1837 containing_type_die_form = form_value; 1838 break; 1839 } 1840 } 1841 } 1842 1843 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1844 Type *class_type = 1845 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1846 1847 CompilerType pointee_clang_type = 1848 pointee_type->GetForwardCompilerType(); 1849 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1850 1851 clang_type = ClangASTContext::CreateMemberPointerType( 1852 class_clang_type, pointee_clang_type); 1853 1854 byte_size = clang_type.GetByteSize(nullptr); 1855 1856 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1857 byte_size, NULL, LLDB_INVALID_UID, 1858 Type::eEncodingIsUID, NULL, clang_type, 1859 Type::eResolveStateForward)); 1860 } 1861 1862 break; 1863 } 1864 default: 1865 dwarf->GetObjectFile()->GetModule()->ReportError( 1866 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1867 "attach the file at the start of this error message", 1868 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1869 break; 1870 } 1871 1872 if (type_sp.get()) { 1873 DWARFDIE sc_parent_die = 1874 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1875 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1876 1877 SymbolContextScope *symbol_context_scope = NULL; 1878 if (sc_parent_tag == DW_TAG_compile_unit || 1879 sc_parent_tag == DW_TAG_partial_unit) { 1880 symbol_context_scope = sc.comp_unit; 1881 } else if (sc.function != NULL && sc_parent_die) { 1882 symbol_context_scope = 1883 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1884 if (symbol_context_scope == NULL) 1885 symbol_context_scope = sc.function; 1886 } 1887 1888 if (symbol_context_scope != NULL) { 1889 type_sp->SetSymbolContextScope(symbol_context_scope); 1890 } 1891 1892 // We are ready to put this type into the uniqued list up at the module 1893 // level 1894 type_list->Insert(type_sp); 1895 1896 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1897 } 1898 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1899 type_sp = type_ptr->shared_from_this(); 1900 } 1901 } 1902 return type_sp; 1903 } 1904 1905 // DWARF parsing functions 1906 1907 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1908 public: 1909 DelayedAddObjCClassProperty( 1910 const CompilerType &class_opaque_type, const char *property_name, 1911 const CompilerType &property_opaque_type, // The property type is only 1912 // required if you don't have an 1913 // ivar decl 1914 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1915 const char *property_getter_name, uint32_t property_attributes, 1916 const ClangASTMetadata *metadata) 1917 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1918 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1919 m_property_setter_name(property_setter_name), 1920 m_property_getter_name(property_getter_name), 1921 m_property_attributes(property_attributes) { 1922 if (metadata != NULL) { 1923 m_metadata_ap.reset(new ClangASTMetadata()); 1924 *m_metadata_ap = *metadata; 1925 } 1926 } 1927 1928 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1929 *this = rhs; 1930 } 1931 1932 DelayedAddObjCClassProperty & 1933 operator=(const DelayedAddObjCClassProperty &rhs) { 1934 m_class_opaque_type = rhs.m_class_opaque_type; 1935 m_property_name = rhs.m_property_name; 1936 m_property_opaque_type = rhs.m_property_opaque_type; 1937 m_ivar_decl = rhs.m_ivar_decl; 1938 m_property_setter_name = rhs.m_property_setter_name; 1939 m_property_getter_name = rhs.m_property_getter_name; 1940 m_property_attributes = rhs.m_property_attributes; 1941 1942 if (rhs.m_metadata_ap.get()) { 1943 m_metadata_ap.reset(new ClangASTMetadata()); 1944 *m_metadata_ap = *rhs.m_metadata_ap; 1945 } 1946 return *this; 1947 } 1948 1949 bool Finalize() { 1950 return ClangASTContext::AddObjCClassProperty( 1951 m_class_opaque_type, m_property_name, m_property_opaque_type, 1952 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1953 m_property_attributes, m_metadata_ap.get()); 1954 } 1955 1956 private: 1957 CompilerType m_class_opaque_type; 1958 const char *m_property_name; 1959 CompilerType m_property_opaque_type; 1960 clang::ObjCIvarDecl *m_ivar_decl; 1961 const char *m_property_setter_name; 1962 const char *m_property_getter_name; 1963 uint32_t m_property_attributes; 1964 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1965 }; 1966 1967 bool DWARFASTParserClang::ParseTemplateDIE( 1968 const DWARFDIE &die, 1969 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1970 const dw_tag_t tag = die.Tag(); 1971 bool is_template_template_argument = false; 1972 1973 switch (tag) { 1974 case DW_TAG_GNU_template_parameter_pack: { 1975 template_param_infos.packed_args.reset( 1976 new ClangASTContext::TemplateParameterInfos); 1977 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1978 child_die = child_die.GetSibling()) { 1979 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1980 return false; 1981 } 1982 if (const char *name = die.GetName()) { 1983 template_param_infos.pack_name = name; 1984 } 1985 return true; 1986 } 1987 case DW_TAG_GNU_template_template_param: 1988 is_template_template_argument = true; 1989 LLVM_FALLTHROUGH; 1990 case DW_TAG_template_type_parameter: 1991 case DW_TAG_template_value_parameter: { 1992 DWARFAttributes attributes; 1993 const size_t num_attributes = die.GetAttributes(attributes); 1994 const char *name = nullptr; 1995 const char *template_name = nullptr; 1996 CompilerType clang_type; 1997 uint64_t uval64 = 0; 1998 bool uval64_valid = false; 1999 if (num_attributes > 0) { 2000 DWARFFormValue form_value; 2001 for (size_t i = 0; i < num_attributes; ++i) { 2002 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2003 2004 switch (attr) { 2005 case DW_AT_name: 2006 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2007 name = form_value.AsCString(); 2008 break; 2009 2010 case DW_AT_GNU_template_name: 2011 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2012 template_name = form_value.AsCString(); 2013 break; 2014 2015 case DW_AT_type: 2016 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2017 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2018 if (lldb_type) 2019 clang_type = lldb_type->GetForwardCompilerType(); 2020 } 2021 break; 2022 2023 case DW_AT_const_value: 2024 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2025 uval64_valid = true; 2026 uval64 = form_value.Unsigned(); 2027 } 2028 break; 2029 default: 2030 break; 2031 } 2032 } 2033 2034 clang::ASTContext *ast = m_ast.getASTContext(); 2035 if (!clang_type) 2036 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2037 2038 if (!is_template_template_argument) { 2039 bool is_signed = false; 2040 if (name && name[0]) 2041 template_param_infos.names.push_back(name); 2042 else 2043 template_param_infos.names.push_back(NULL); 2044 2045 // Get the signed value for any integer or enumeration if available 2046 clang_type.IsIntegerOrEnumerationType(is_signed); 2047 2048 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2049 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2050 template_param_infos.args.push_back( 2051 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2052 ClangUtil::GetQualType(clang_type))); 2053 } else { 2054 template_param_infos.args.push_back( 2055 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2056 } 2057 } else { 2058 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2059 template_param_infos.names.push_back(name); 2060 template_param_infos.args.push_back( 2061 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2062 } 2063 } 2064 } 2065 return true; 2066 2067 default: 2068 break; 2069 } 2070 return false; 2071 } 2072 2073 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2074 const DWARFDIE &parent_die, 2075 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2076 2077 if (!parent_die) 2078 return false; 2079 2080 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2081 die = die.GetSibling()) { 2082 const dw_tag_t tag = die.Tag(); 2083 2084 switch (tag) { 2085 case DW_TAG_template_type_parameter: 2086 case DW_TAG_template_value_parameter: 2087 case DW_TAG_GNU_template_parameter_pack: 2088 case DW_TAG_GNU_template_template_param: 2089 ParseTemplateDIE(die, template_param_infos); 2090 break; 2091 2092 default: 2093 break; 2094 } 2095 } 2096 if (template_param_infos.args.empty()) 2097 return false; 2098 return template_param_infos.args.size() == template_param_infos.names.size(); 2099 } 2100 2101 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2102 lldb_private::Type *type, 2103 CompilerType &clang_type) { 2104 SymbolFileDWARF *dwarf = die.GetDWARF(); 2105 2106 std::lock_guard<std::recursive_mutex> guard( 2107 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2108 2109 // Disable external storage for this type so we don't get anymore 2110 // clang::ExternalASTSource queries for this type. 2111 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2112 2113 if (!die) 2114 return false; 2115 2116 #if defined LLDB_CONFIGURATION_DEBUG 2117 //---------------------------------------------------------------------- 2118 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES environment 2119 // variable can be set with one or more typenames separated by ';' 2120 // characters. This will cause this function to not complete any types whose 2121 // names match. 2122 // 2123 // Examples of setting this environment variable: 2124 // 2125 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2126 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2127 //---------------------------------------------------------------------- 2128 const char *dont_complete_typenames_cstr = 2129 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2130 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2131 const char *die_name = die.GetName(); 2132 if (die_name && die_name[0]) { 2133 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2134 if (match) { 2135 size_t die_name_length = strlen(die_name); 2136 while (match) { 2137 const char separator_char = ';'; 2138 const char next_char = match[die_name_length]; 2139 if (next_char == '\0' || next_char == separator_char) { 2140 if (match == dont_complete_typenames_cstr || 2141 match[-1] == separator_char) 2142 return false; 2143 } 2144 match = strstr(match + 1, die_name); 2145 } 2146 } 2147 } 2148 } 2149 #endif 2150 2151 const dw_tag_t tag = die.Tag(); 2152 2153 Log *log = 2154 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2155 if (log) 2156 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2157 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2158 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2159 assert(clang_type); 2160 DWARFAttributes attributes; 2161 switch (tag) { 2162 case DW_TAG_structure_type: 2163 case DW_TAG_union_type: 2164 case DW_TAG_class_type: { 2165 ClangASTImporter::LayoutInfo layout_info; 2166 2167 { 2168 if (die.HasChildren()) { 2169 LanguageType class_language = eLanguageTypeUnknown; 2170 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2171 class_language = eLanguageTypeObjC; 2172 // For objective C we don't start the definition when the class is 2173 // created. 2174 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2175 } 2176 2177 int tag_decl_kind = -1; 2178 AccessType default_accessibility = eAccessNone; 2179 if (tag == DW_TAG_structure_type) { 2180 tag_decl_kind = clang::TTK_Struct; 2181 default_accessibility = eAccessPublic; 2182 } else if (tag == DW_TAG_union_type) { 2183 tag_decl_kind = clang::TTK_Union; 2184 default_accessibility = eAccessPublic; 2185 } else if (tag == DW_TAG_class_type) { 2186 tag_decl_kind = clang::TTK_Class; 2187 default_accessibility = eAccessPrivate; 2188 } 2189 2190 SymbolContext sc(die.GetLLDBCompileUnit()); 2191 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 2192 std::vector<int> member_accessibilities; 2193 bool is_a_class = false; 2194 // Parse members and base classes first 2195 DWARFDIECollection member_function_dies; 2196 2197 DelayedPropertyList delayed_properties; 2198 ParseChildMembers(sc, die, clang_type, class_language, bases, 2199 member_accessibilities, member_function_dies, 2200 delayed_properties, default_accessibility, is_a_class, 2201 layout_info); 2202 2203 // Now parse any methods if there were any... 2204 size_t num_functions = member_function_dies.Size(); 2205 if (num_functions > 0) { 2206 for (size_t i = 0; i < num_functions; ++i) { 2207 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2208 } 2209 } 2210 2211 if (class_language == eLanguageTypeObjC) { 2212 ConstString class_name(clang_type.GetTypeName()); 2213 if (class_name) { 2214 DIEArray method_die_offsets; 2215 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2216 2217 if (!method_die_offsets.empty()) { 2218 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2219 2220 const size_t num_matches = method_die_offsets.size(); 2221 for (size_t i = 0; i < num_matches; ++i) { 2222 const DIERef &die_ref = method_die_offsets[i]; 2223 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2224 2225 if (method_die) 2226 method_die.ResolveType(); 2227 } 2228 } 2229 2230 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2231 pe = delayed_properties.end(); 2232 pi != pe; ++pi) 2233 pi->Finalize(); 2234 } 2235 } 2236 2237 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2238 // need to tell the clang type it is actually a class. 2239 if (class_language != eLanguageTypeObjC) { 2240 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2241 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2242 clang::TTK_Class); 2243 } 2244 2245 // Since DW_TAG_structure_type gets used for both classes and 2246 // structures, we may need to set any DW_TAG_member fields to have a 2247 // "private" access if none was specified. When we parsed the child 2248 // members we tracked that actual accessibility value for each 2249 // DW_TAG_member in the "member_accessibilities" array. If the value 2250 // for the member is zero, then it was set to the 2251 // "default_accessibility" which for structs was "public". Below we 2252 // correct this by setting any fields to "private" that weren't 2253 // correctly set. 2254 if (is_a_class && !member_accessibilities.empty()) { 2255 // This is a class and all members that didn't have their access 2256 // specified are private. 2257 m_ast.SetDefaultAccessForRecordFields( 2258 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2259 &member_accessibilities.front(), member_accessibilities.size()); 2260 } 2261 2262 if (!bases.empty()) { 2263 // Make sure all base classes refer to complete types and not forward 2264 // declarations. If we don't do this, clang will crash with an 2265 // assertion in the call to clang_type.TransferBaseClasses() 2266 for (const auto &base_class : bases) { 2267 clang::TypeSourceInfo *type_source_info = 2268 base_class->getTypeSourceInfo(); 2269 if (type_source_info) { 2270 CompilerType base_class_type( 2271 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2272 if (base_class_type.GetCompleteType() == false) { 2273 auto module = dwarf->GetObjectFile()->GetModule(); 2274 module->ReportError(":: Class '%s' has a base class '%s' which " 2275 "does not have a complete definition.", 2276 die.GetName(), 2277 base_class_type.GetTypeName().GetCString()); 2278 if (die.GetCU()->GetProducer() == eProducerClang) 2279 module->ReportError(":: Try compiling the source file with " 2280 "-fstandalone-debug."); 2281 2282 // We have no choice other than to pretend that the base class 2283 // is complete. If we don't do this, clang will crash when we 2284 // call setBases() inside of 2285 // "clang_type.TransferBaseClasses()" below. Since we 2286 // provide layout assistance, all ivars in this class and other 2287 // classes will be fine, this is the best we can do short of 2288 // crashing. 2289 if (ClangASTContext::StartTagDeclarationDefinition( 2290 base_class_type)) { 2291 ClangASTContext::CompleteTagDeclarationDefinition( 2292 base_class_type); 2293 } 2294 } 2295 } 2296 } 2297 2298 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2299 std::move(bases)); 2300 } 2301 } 2302 } 2303 2304 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2305 ClangASTContext::BuildIndirectFields(clang_type); 2306 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2307 2308 if (!layout_info.field_offsets.empty() || 2309 !layout_info.base_offsets.empty() || 2310 !layout_info.vbase_offsets.empty()) { 2311 if (type) 2312 layout_info.bit_size = type->GetByteSize() * 8; 2313 if (layout_info.bit_size == 0) 2314 layout_info.bit_size = 2315 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2316 2317 clang::CXXRecordDecl *record_decl = 2318 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2319 if (record_decl) { 2320 if (log) { 2321 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2322 2323 if (module_sp) { 2324 module_sp->LogMessage( 2325 log, 2326 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2327 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2328 ", alignment = %" PRIu64 2329 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2330 static_cast<void *>(clang_type.GetOpaqueQualType()), 2331 static_cast<void *>(record_decl), layout_info.bit_size, 2332 layout_info.alignment, 2333 static_cast<uint32_t>(layout_info.field_offsets.size()), 2334 static_cast<uint32_t>(layout_info.base_offsets.size()), 2335 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2336 2337 uint32_t idx; 2338 { 2339 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2340 pos, 2341 end = layout_info.field_offsets.end(); 2342 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2343 ++pos, ++idx) { 2344 module_sp->LogMessage( 2345 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2346 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2347 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2348 static_cast<uint32_t>(pos->second), 2349 pos->first->getNameAsString().c_str()); 2350 } 2351 } 2352 2353 { 2354 llvm::DenseMap<const clang::CXXRecordDecl *, 2355 clang::CharUnits>::const_iterator base_pos, 2356 base_end = layout_info.base_offsets.end(); 2357 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2358 base_pos != base_end; ++base_pos, ++idx) { 2359 module_sp->LogMessage( 2360 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2361 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2362 clang_type.GetOpaqueQualType(), idx, 2363 (uint32_t)base_pos->second.getQuantity(), 2364 base_pos->first->getNameAsString().c_str()); 2365 } 2366 } 2367 { 2368 llvm::DenseMap<const clang::CXXRecordDecl *, 2369 clang::CharUnits>::const_iterator vbase_pos, 2370 vbase_end = layout_info.vbase_offsets.end(); 2371 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2372 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2373 module_sp->LogMessage( 2374 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2375 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2376 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2377 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2378 vbase_pos->first->getNameAsString().c_str()); 2379 } 2380 } 2381 } 2382 } 2383 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2384 } 2385 } 2386 } 2387 2388 return (bool)clang_type; 2389 2390 case DW_TAG_enumeration_type: 2391 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2392 if (die.HasChildren()) { 2393 SymbolContext sc(die.GetLLDBCompileUnit()); 2394 bool is_signed = false; 2395 clang_type.IsIntegerType(is_signed); 2396 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2397 die); 2398 } 2399 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2400 } 2401 return (bool)clang_type; 2402 2403 default: 2404 assert(false && "not a forward clang type decl!"); 2405 break; 2406 } 2407 2408 return false; 2409 } 2410 2411 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2412 lldb_private::CompilerDeclContext decl_context) { 2413 std::vector<DWARFDIE> result; 2414 for (auto it = m_decl_ctx_to_die.find( 2415 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2416 it != m_decl_ctx_to_die.end(); it++) 2417 result.push_back(it->second); 2418 return result; 2419 } 2420 2421 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2422 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2423 if (clang_decl != nullptr) 2424 return CompilerDecl(&m_ast, clang_decl); 2425 return CompilerDecl(); 2426 } 2427 2428 CompilerDeclContext 2429 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2430 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2431 if (clang_decl_ctx) 2432 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2433 return CompilerDeclContext(); 2434 } 2435 2436 CompilerDeclContext 2437 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2438 clang::DeclContext *clang_decl_ctx = 2439 GetClangDeclContextContainingDIE(die, nullptr); 2440 if (clang_decl_ctx) 2441 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2442 return CompilerDeclContext(); 2443 } 2444 2445 size_t DWARFASTParserClang::ParseChildEnumerators( 2446 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2447 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2448 if (!parent_die) 2449 return 0; 2450 2451 size_t enumerators_added = 0; 2452 2453 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2454 die = die.GetSibling()) { 2455 const dw_tag_t tag = die.Tag(); 2456 if (tag == DW_TAG_enumerator) { 2457 DWARFAttributes attributes; 2458 const size_t num_child_attributes = die.GetAttributes(attributes); 2459 if (num_child_attributes > 0) { 2460 const char *name = NULL; 2461 bool got_value = false; 2462 int64_t enum_value = 0; 2463 Declaration decl; 2464 2465 uint32_t i; 2466 for (i = 0; i < num_child_attributes; ++i) { 2467 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2468 DWARFFormValue form_value; 2469 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2470 switch (attr) { 2471 case DW_AT_const_value: 2472 got_value = true; 2473 if (is_signed) 2474 enum_value = form_value.Signed(); 2475 else 2476 enum_value = form_value.Unsigned(); 2477 break; 2478 2479 case DW_AT_name: 2480 name = form_value.AsCString(); 2481 break; 2482 2483 case DW_AT_description: 2484 default: 2485 case DW_AT_decl_file: 2486 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2487 form_value.Unsigned())); 2488 break; 2489 case DW_AT_decl_line: 2490 decl.SetLine(form_value.Unsigned()); 2491 break; 2492 case DW_AT_decl_column: 2493 decl.SetColumn(form_value.Unsigned()); 2494 break; 2495 case DW_AT_sibling: 2496 break; 2497 } 2498 } 2499 } 2500 2501 if (name && name[0] && got_value) { 2502 m_ast.AddEnumerationValueToEnumerationType( 2503 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2504 ++enumerators_added; 2505 } 2506 } 2507 } 2508 } 2509 return enumerators_added; 2510 } 2511 2512 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2513 2514 class DIEStack { 2515 public: 2516 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2517 2518 void LogDIEs(Log *log) { 2519 StreamString log_strm; 2520 const size_t n = m_dies.size(); 2521 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2522 for (size_t i = 0; i < n; i++) { 2523 std::string qualified_name; 2524 const DWARFDIE &die = m_dies[i]; 2525 die.GetQualifiedName(qualified_name); 2526 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2527 die.GetOffset(), die.GetTagAsCString(), 2528 qualified_name.c_str()); 2529 } 2530 log->PutCString(log_strm.GetData()); 2531 } 2532 void Pop() { m_dies.pop_back(); } 2533 2534 class ScopedPopper { 2535 public: 2536 ScopedPopper(DIEStack &die_stack) 2537 : m_die_stack(die_stack), m_valid(false) {} 2538 2539 void Push(const DWARFDIE &die) { 2540 m_valid = true; 2541 m_die_stack.Push(die); 2542 } 2543 2544 ~ScopedPopper() { 2545 if (m_valid) 2546 m_die_stack.Pop(); 2547 } 2548 2549 protected: 2550 DIEStack &m_die_stack; 2551 bool m_valid; 2552 }; 2553 2554 protected: 2555 typedef std::vector<DWARFDIE> Stack; 2556 Stack m_dies; 2557 }; 2558 #endif 2559 2560 Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2561 const DWARFDIE &die) { 2562 DWARFRangeList func_ranges; 2563 const char *name = NULL; 2564 const char *mangled = NULL; 2565 int decl_file = 0; 2566 int decl_line = 0; 2567 int decl_column = 0; 2568 int call_file = 0; 2569 int call_line = 0; 2570 int call_column = 0; 2571 DWARFExpression frame_base(die.GetCU()); 2572 2573 const dw_tag_t tag = die.Tag(); 2574 2575 if (tag != DW_TAG_subprogram) 2576 return NULL; 2577 2578 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2579 decl_column, call_file, call_line, call_column, 2580 &frame_base)) { 2581 2582 // Union of all ranges in the function DIE (if the function is 2583 // discontiguous) 2584 AddressRange func_range; 2585 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2586 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2587 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2588 lowest_func_addr <= highest_func_addr) { 2589 ModuleSP module_sp(die.GetModule()); 2590 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2591 lowest_func_addr, module_sp->GetSectionList()); 2592 if (func_range.GetBaseAddress().IsValid()) 2593 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2594 } 2595 2596 if (func_range.GetBaseAddress().IsValid()) { 2597 Mangled func_name; 2598 if (mangled) 2599 func_name.SetValue(ConstString(mangled), true); 2600 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2601 die.GetParent().Tag() == DW_TAG_partial_unit) && 2602 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2603 strcmp(name, "main") != 0) { 2604 // If the mangled name is not present in the DWARF, generate the 2605 // demangled name using the decl context. We skip if the function is 2606 // "main" as its name is never mangled. 2607 bool is_static = false; 2608 bool is_variadic = false; 2609 bool has_template_params = false; 2610 unsigned type_quals = 0; 2611 std::vector<CompilerType> param_types; 2612 std::vector<clang::ParmVarDecl *> param_decls; 2613 DWARFDeclContext decl_ctx; 2614 StreamString sstr; 2615 2616 die.GetDWARFDeclContext(decl_ctx); 2617 sstr << decl_ctx.GetQualifiedName(); 2618 2619 clang::DeclContext *containing_decl_ctx = 2620 GetClangDeclContextContainingDIE(die, nullptr); 2621 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2622 is_variadic, has_template_params, param_types, 2623 param_decls, type_quals); 2624 sstr << "("; 2625 for (size_t i = 0; i < param_types.size(); i++) { 2626 if (i > 0) 2627 sstr << ", "; 2628 sstr << param_types[i].GetTypeName(); 2629 } 2630 if (is_variadic) 2631 sstr << ", ..."; 2632 sstr << ")"; 2633 if (type_quals & clang::Qualifiers::Const) 2634 sstr << " const"; 2635 2636 func_name.SetValue(ConstString(sstr.GetString()), false); 2637 } else 2638 func_name.SetValue(ConstString(name), false); 2639 2640 FunctionSP func_sp; 2641 std::unique_ptr<Declaration> decl_ap; 2642 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2643 decl_ap.reset(new Declaration( 2644 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2645 decl_line, decl_column)); 2646 2647 SymbolFileDWARF *dwarf = die.GetDWARF(); 2648 // Supply the type _only_ if it has already been parsed 2649 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2650 2651 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2652 2653 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2654 const user_id_t func_user_id = die.GetID(); 2655 func_sp.reset(new Function(sc.comp_unit, 2656 func_user_id, // UserID is the DIE offset 2657 func_user_id, func_name, func_type, 2658 func_range)); // first address range 2659 2660 if (func_sp.get() != NULL) { 2661 if (frame_base.IsValid()) 2662 func_sp->GetFrameBaseExpression() = frame_base; 2663 sc.comp_unit->AddFunction(func_sp); 2664 return func_sp.get(); 2665 } 2666 } 2667 } 2668 } 2669 return NULL; 2670 } 2671 2672 bool DWARFASTParserClang::ParseChildMembers( 2673 const SymbolContext &sc, const DWARFDIE &parent_die, 2674 CompilerType &class_clang_type, const LanguageType class_language, 2675 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2676 std::vector<int> &member_accessibilities, 2677 DWARFDIECollection &member_function_dies, 2678 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2679 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2680 if (!parent_die) 2681 return 0; 2682 2683 // Get the parent byte size so we can verify any members will fit 2684 const uint64_t parent_byte_size = 2685 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2686 const uint64_t parent_bit_size = 2687 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2688 2689 uint32_t member_idx = 0; 2690 BitfieldInfo last_field_info; 2691 2692 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2693 ClangASTContext *ast = 2694 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2695 if (ast == nullptr) 2696 return 0; 2697 2698 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2699 die = die.GetSibling()) { 2700 dw_tag_t tag = die.Tag(); 2701 2702 switch (tag) { 2703 case DW_TAG_member: 2704 case DW_TAG_APPLE_property: { 2705 DWARFAttributes attributes; 2706 const size_t num_attributes = die.GetAttributes(attributes); 2707 if (num_attributes > 0) { 2708 Declaration decl; 2709 // DWARFExpression location; 2710 const char *name = NULL; 2711 const char *prop_name = NULL; 2712 const char *prop_getter_name = NULL; 2713 const char *prop_setter_name = NULL; 2714 uint32_t prop_attributes = 0; 2715 2716 bool is_artificial = false; 2717 DWARFFormValue encoding_form; 2718 AccessType accessibility = eAccessNone; 2719 uint32_t member_byte_offset = 2720 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2721 size_t byte_size = 0; 2722 int64_t bit_offset = 0; 2723 uint64_t data_bit_offset = UINT64_MAX; 2724 size_t bit_size = 0; 2725 bool is_external = 2726 false; // On DW_TAG_members, this means the member is static 2727 uint32_t i; 2728 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2729 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2730 DWARFFormValue form_value; 2731 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2732 switch (attr) { 2733 case DW_AT_decl_file: 2734 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2735 form_value.Unsigned())); 2736 break; 2737 case DW_AT_decl_line: 2738 decl.SetLine(form_value.Unsigned()); 2739 break; 2740 case DW_AT_decl_column: 2741 decl.SetColumn(form_value.Unsigned()); 2742 break; 2743 case DW_AT_name: 2744 name = form_value.AsCString(); 2745 break; 2746 case DW_AT_type: 2747 encoding_form = form_value; 2748 break; 2749 case DW_AT_bit_offset: 2750 bit_offset = form_value.Signed(); 2751 break; 2752 case DW_AT_bit_size: 2753 bit_size = form_value.Unsigned(); 2754 break; 2755 case DW_AT_byte_size: 2756 byte_size = form_value.Unsigned(); 2757 break; 2758 case DW_AT_data_bit_offset: 2759 data_bit_offset = form_value.Unsigned(); 2760 break; 2761 case DW_AT_data_member_location: 2762 if (form_value.BlockData()) { 2763 Value initialValue(0); 2764 Value memberOffset(0); 2765 const DWARFDataExtractor &debug_info_data = die.GetData(); 2766 uint32_t block_length = form_value.Unsigned(); 2767 uint32_t block_offset = 2768 form_value.BlockData() - debug_info_data.GetDataStart(); 2769 if (DWARFExpression::Evaluate( 2770 nullptr, // ExecutionContext * 2771 nullptr, // RegisterContext * 2772 module_sp, debug_info_data, die.GetCU(), block_offset, 2773 block_length, eRegisterKindDWARF, &initialValue, 2774 nullptr, memberOffset, nullptr)) { 2775 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2776 } 2777 } else { 2778 // With DWARF 3 and later, if the value is an integer constant, 2779 // this form value is the offset in bytes from the beginning of 2780 // the containing entity. 2781 member_byte_offset = form_value.Unsigned(); 2782 } 2783 break; 2784 2785 case DW_AT_accessibility: 2786 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2787 break; 2788 case DW_AT_artificial: 2789 is_artificial = form_value.Boolean(); 2790 break; 2791 case DW_AT_APPLE_property_name: 2792 prop_name = form_value.AsCString(); 2793 break; 2794 case DW_AT_APPLE_property_getter: 2795 prop_getter_name = form_value.AsCString(); 2796 break; 2797 case DW_AT_APPLE_property_setter: 2798 prop_setter_name = form_value.AsCString(); 2799 break; 2800 case DW_AT_APPLE_property_attribute: 2801 prop_attributes = form_value.Unsigned(); 2802 break; 2803 case DW_AT_external: 2804 is_external = form_value.Boolean(); 2805 break; 2806 2807 default: 2808 case DW_AT_declaration: 2809 case DW_AT_description: 2810 case DW_AT_mutable: 2811 case DW_AT_visibility: 2812 case DW_AT_sibling: 2813 break; 2814 } 2815 } 2816 } 2817 2818 if (prop_name) { 2819 ConstString fixed_getter; 2820 ConstString fixed_setter; 2821 2822 // Check if the property getter/setter were provided as full names. 2823 // We want basenames, so we extract them. 2824 2825 if (prop_getter_name && prop_getter_name[0] == '-') { 2826 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2827 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2828 } 2829 2830 if (prop_setter_name && prop_setter_name[0] == '-') { 2831 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2832 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2833 } 2834 2835 // If the names haven't been provided, they need to be filled in. 2836 2837 if (!prop_getter_name) { 2838 prop_getter_name = prop_name; 2839 } 2840 if (!prop_setter_name && prop_name[0] && 2841 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2842 StreamString ss; 2843 2844 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2845 2846 fixed_setter.SetString(ss.GetString()); 2847 prop_setter_name = fixed_setter.GetCString(); 2848 } 2849 } 2850 2851 // Clang has a DWARF generation bug where sometimes it represents 2852 // fields that are references with bad byte size and bit size/offset 2853 // information such as: 2854 // 2855 // DW_AT_byte_size( 0x00 ) 2856 // DW_AT_bit_size( 0x40 ) 2857 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2858 // 2859 // So check the bit offset to make sure it is sane, and if the values 2860 // are not sane, remove them. If we don't do this then we will end up 2861 // with a crash if we try to use this type in an expression when clang 2862 // becomes unhappy with its recycled debug info. 2863 2864 if (byte_size == 0 && bit_offset < 0) { 2865 bit_size = 0; 2866 bit_offset = 0; 2867 } 2868 2869 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2870 if (class_language == eLanguageTypeObjC || 2871 class_language == eLanguageTypeObjC_plus_plus) 2872 accessibility = eAccessNone; 2873 2874 // Handle static members 2875 if (is_external && member_byte_offset == UINT32_MAX) { 2876 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2877 2878 if (var_type) { 2879 if (accessibility == eAccessNone) 2880 accessibility = eAccessPublic; 2881 ClangASTContext::AddVariableToRecordType( 2882 class_clang_type, name, var_type->GetLayoutCompilerType(), 2883 accessibility); 2884 } 2885 break; 2886 } 2887 2888 if (is_artificial == false) { 2889 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2890 2891 clang::FieldDecl *field_decl = NULL; 2892 if (tag == DW_TAG_member) { 2893 if (member_type) { 2894 if (accessibility == eAccessNone) 2895 accessibility = default_accessibility; 2896 member_accessibilities.push_back(accessibility); 2897 2898 uint64_t field_bit_offset = 2899 (member_byte_offset == UINT32_MAX ? 0 2900 : (member_byte_offset * 8)); 2901 if (bit_size > 0) { 2902 2903 BitfieldInfo this_field_info; 2904 this_field_info.bit_offset = field_bit_offset; 2905 this_field_info.bit_size = bit_size; 2906 2907 ///////////////////////////////////////////////////////////// 2908 // How to locate a field given the DWARF debug information 2909 // 2910 // AT_byte_size indicates the size of the word in which the bit 2911 // offset must be interpreted. 2912 // 2913 // AT_data_member_location indicates the byte offset of the 2914 // word from the base address of the structure. 2915 // 2916 // AT_bit_offset indicates how many bits into the word 2917 // (according to the host endianness) the low-order bit of the 2918 // field starts. AT_bit_offset can be negative. 2919 // 2920 // AT_bit_size indicates the size of the field in bits. 2921 ///////////////////////////////////////////////////////////// 2922 2923 if (data_bit_offset != UINT64_MAX) { 2924 this_field_info.bit_offset = data_bit_offset; 2925 } else { 2926 if (byte_size == 0) 2927 byte_size = member_type->GetByteSize(); 2928 2929 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2930 if (objfile->GetByteOrder() == eByteOrderLittle) { 2931 this_field_info.bit_offset += byte_size * 8; 2932 this_field_info.bit_offset -= (bit_offset + bit_size); 2933 } else { 2934 this_field_info.bit_offset += bit_offset; 2935 } 2936 } 2937 2938 if ((this_field_info.bit_offset >= parent_bit_size) || 2939 !last_field_info.NextBitfieldOffsetIsValid( 2940 this_field_info.bit_offset)) { 2941 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2942 objfile->GetModule()->ReportWarning( 2943 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2944 "bit offset (0x%8.8" PRIx64 2945 ") member will be ignored. Please file a bug against the " 2946 "compiler and include the preprocessed output for %s\n", 2947 die.GetID(), DW_TAG_value_to_name(tag), name, 2948 this_field_info.bit_offset, 2949 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2950 : "the source file"); 2951 this_field_info.Clear(); 2952 continue; 2953 } 2954 2955 // Update the field bit offset we will report for layout 2956 field_bit_offset = this_field_info.bit_offset; 2957 2958 // If the member to be emitted did not start on a character 2959 // boundary and there is empty space between the last field and 2960 // this one, then we need to emit an anonymous member filling 2961 // up the space up to its start. There are three cases here: 2962 // 2963 // 1 If the previous member ended on a character boundary, then 2964 // we can emit an 2965 // anonymous member starting at the most recent character 2966 // boundary. 2967 // 2968 // 2 If the previous member did not end on a character boundary 2969 // and the distance 2970 // from the end of the previous member to the current member 2971 // is less than a 2972 // word width, then we can emit an anonymous member starting 2973 // right after the 2974 // previous member and right before this member. 2975 // 2976 // 3 If the previous member did not end on a character boundary 2977 // and the distance 2978 // from the end of the previous member to the current member 2979 // is greater than 2980 // or equal a word width, then we act as in Case 1. 2981 2982 const uint64_t character_width = 8; 2983 const uint64_t word_width = 32; 2984 2985 // Objective-C has invalid DW_AT_bit_offset values in older 2986 // versions of clang, so we have to be careful and only insert 2987 // unnamed bitfields if we have a new enough clang. 2988 bool detect_unnamed_bitfields = true; 2989 2990 if (class_language == eLanguageTypeObjC || 2991 class_language == eLanguageTypeObjC_plus_plus) 2992 detect_unnamed_bitfields = 2993 die.GetCU()->Supports_unnamed_objc_bitfields(); 2994 2995 if (detect_unnamed_bitfields) { 2996 BitfieldInfo anon_field_info; 2997 2998 if ((this_field_info.bit_offset % character_width) != 2999 0) // not char aligned 3000 { 3001 uint64_t last_field_end = 0; 3002 3003 if (last_field_info.IsValid()) 3004 last_field_end = 3005 last_field_info.bit_offset + last_field_info.bit_size; 3006 3007 if (this_field_info.bit_offset != last_field_end) { 3008 if (((last_field_end % character_width) == 0) || // case 1 3009 (this_field_info.bit_offset - last_field_end >= 3010 word_width)) // case 3 3011 { 3012 anon_field_info.bit_size = 3013 this_field_info.bit_offset % character_width; 3014 anon_field_info.bit_offset = 3015 this_field_info.bit_offset - 3016 anon_field_info.bit_size; 3017 } else // case 2 3018 { 3019 anon_field_info.bit_size = 3020 this_field_info.bit_offset - last_field_end; 3021 anon_field_info.bit_offset = last_field_end; 3022 } 3023 } 3024 } 3025 3026 if (anon_field_info.IsValid()) { 3027 clang::FieldDecl *unnamed_bitfield_decl = 3028 ClangASTContext::AddFieldToRecordType( 3029 class_clang_type, llvm::StringRef(), 3030 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3031 eEncodingSint, word_width), 3032 accessibility, anon_field_info.bit_size); 3033 3034 layout_info.field_offsets.insert(std::make_pair( 3035 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3036 } 3037 } 3038 last_field_info = this_field_info; 3039 } else { 3040 last_field_info.Clear(); 3041 } 3042 3043 CompilerType member_clang_type = 3044 member_type->GetLayoutCompilerType(); 3045 if (!member_clang_type.IsCompleteType()) 3046 member_clang_type.GetCompleteType(); 3047 3048 { 3049 // Older versions of clang emit array[0] and array[1] in the 3050 // same way (<rdar://problem/12566646>). If the current field 3051 // is at the end of the structure, then there is definitely no 3052 // room for extra elements and we override the type to 3053 // array[0]. 3054 3055 CompilerType member_array_element_type; 3056 uint64_t member_array_size; 3057 bool member_array_is_incomplete; 3058 3059 if (member_clang_type.IsArrayType( 3060 &member_array_element_type, &member_array_size, 3061 &member_array_is_incomplete) && 3062 !member_array_is_incomplete) { 3063 uint64_t parent_byte_size = 3064 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3065 UINT64_MAX); 3066 3067 if (member_byte_offset >= parent_byte_size) { 3068 if (member_array_size != 1 && 3069 (member_array_size != 0 || 3070 member_byte_offset > parent_byte_size)) { 3071 module_sp->ReportError( 3072 "0x%8.8" PRIx64 3073 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3074 " which extends beyond the bounds of 0x%8.8" PRIx64, 3075 die.GetID(), name, encoding_form.Reference(), 3076 parent_die.GetID()); 3077 } 3078 3079 member_clang_type = m_ast.CreateArrayType( 3080 member_array_element_type, 0, false); 3081 } 3082 } 3083 } 3084 3085 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3086 member_clang_type.GetCompleteType() == false) { 3087 if (die.GetCU()->GetProducer() == eProducerClang) 3088 module_sp->ReportError( 3089 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3090 "0x%8.8x (%s) whose type is a forward declaration, not a " 3091 "complete definition.\nTry compiling the source file " 3092 "with -fstandalone-debug", 3093 parent_die.GetOffset(), parent_die.GetName(), 3094 die.GetOffset(), name); 3095 else 3096 module_sp->ReportError( 3097 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3098 "0x%8.8x (%s) whose type is a forward declaration, not a " 3099 "complete definition.\nPlease file a bug against the " 3100 "compiler and include the preprocessed output for %s", 3101 parent_die.GetOffset(), parent_die.GetName(), 3102 die.GetOffset(), name, 3103 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3104 : "the source file"); 3105 // We have no choice other than to pretend that the member 3106 // class is complete. If we don't do this, clang will crash 3107 // when trying to layout the class. Since we provide layout 3108 // assistance, all ivars in this class and other classes will 3109 // be fine, this is the best we can do short of crashing. 3110 if (ClangASTContext::StartTagDeclarationDefinition( 3111 member_clang_type)) { 3112 ClangASTContext::CompleteTagDeclarationDefinition( 3113 member_clang_type); 3114 } else { 3115 module_sp->ReportError( 3116 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3117 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3118 "were not able to start its definition.\nPlease file a " 3119 "bug and attach the file at the start of this error " 3120 "message", 3121 parent_die.GetOffset(), parent_die.GetName(), 3122 die.GetOffset(), name); 3123 } 3124 } 3125 3126 field_decl = ClangASTContext::AddFieldToRecordType( 3127 class_clang_type, name, member_clang_type, accessibility, 3128 bit_size); 3129 3130 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3131 3132 layout_info.field_offsets.insert( 3133 std::make_pair(field_decl, field_bit_offset)); 3134 } else { 3135 if (name) 3136 module_sp->ReportError( 3137 "0x%8.8" PRIx64 3138 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3139 " which was unable to be parsed", 3140 die.GetID(), name, encoding_form.Reference()); 3141 else 3142 module_sp->ReportError( 3143 "0x%8.8" PRIx64 3144 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3145 " which was unable to be parsed", 3146 die.GetID(), encoding_form.Reference()); 3147 } 3148 } 3149 3150 if (prop_name != NULL && member_type) { 3151 clang::ObjCIvarDecl *ivar_decl = NULL; 3152 3153 if (field_decl) { 3154 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3155 assert(ivar_decl != NULL); 3156 } 3157 3158 ClangASTMetadata metadata; 3159 metadata.SetUserID(die.GetID()); 3160 delayed_properties.push_back(DelayedAddObjCClassProperty( 3161 class_clang_type, prop_name, 3162 member_type->GetLayoutCompilerType(), ivar_decl, 3163 prop_setter_name, prop_getter_name, prop_attributes, 3164 &metadata)); 3165 3166 if (ivar_decl) 3167 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3168 } 3169 } 3170 } 3171 ++member_idx; 3172 } break; 3173 3174 case DW_TAG_subprogram: 3175 // Let the type parsing code handle this one for us. 3176 member_function_dies.Append(die); 3177 break; 3178 3179 case DW_TAG_inheritance: { 3180 is_a_class = true; 3181 if (default_accessibility == eAccessNone) 3182 default_accessibility = eAccessPrivate; 3183 // TODO: implement DW_TAG_inheritance type parsing 3184 DWARFAttributes attributes; 3185 const size_t num_attributes = die.GetAttributes(attributes); 3186 if (num_attributes > 0) { 3187 Declaration decl; 3188 DWARFExpression location(die.GetCU()); 3189 DWARFFormValue encoding_form; 3190 AccessType accessibility = default_accessibility; 3191 bool is_virtual = false; 3192 bool is_base_of_class = true; 3193 off_t member_byte_offset = 0; 3194 uint32_t i; 3195 for (i = 0; i < num_attributes; ++i) { 3196 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3197 DWARFFormValue form_value; 3198 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3199 switch (attr) { 3200 case DW_AT_decl_file: 3201 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3202 form_value.Unsigned())); 3203 break; 3204 case DW_AT_decl_line: 3205 decl.SetLine(form_value.Unsigned()); 3206 break; 3207 case DW_AT_decl_column: 3208 decl.SetColumn(form_value.Unsigned()); 3209 break; 3210 case DW_AT_type: 3211 encoding_form = form_value; 3212 break; 3213 case DW_AT_data_member_location: 3214 if (form_value.BlockData()) { 3215 Value initialValue(0); 3216 Value memberOffset(0); 3217 const DWARFDataExtractor &debug_info_data = die.GetData(); 3218 uint32_t block_length = form_value.Unsigned(); 3219 uint32_t block_offset = 3220 form_value.BlockData() - debug_info_data.GetDataStart(); 3221 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3222 debug_info_data, die.GetCU(), 3223 block_offset, block_length, 3224 eRegisterKindDWARF, &initialValue, 3225 nullptr, memberOffset, nullptr)) { 3226 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3227 } 3228 } else { 3229 // With DWARF 3 and later, if the value is an integer constant, 3230 // this form value is the offset in bytes from the beginning of 3231 // the containing entity. 3232 member_byte_offset = form_value.Unsigned(); 3233 } 3234 break; 3235 3236 case DW_AT_accessibility: 3237 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3238 break; 3239 3240 case DW_AT_virtuality: 3241 is_virtual = form_value.Boolean(); 3242 break; 3243 3244 case DW_AT_sibling: 3245 break; 3246 3247 default: 3248 break; 3249 } 3250 } 3251 } 3252 3253 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3254 if (base_class_type == NULL) { 3255 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3256 "resolve the base class at 0x%8.8" PRIx64 3257 " from enclosing type 0x%8.8x. \nPlease file " 3258 "a bug and attach the file at the start of " 3259 "this error message", 3260 die.GetOffset(), encoding_form.Reference(), 3261 parent_die.GetOffset()); 3262 break; 3263 } 3264 3265 CompilerType base_class_clang_type = 3266 base_class_type->GetFullCompilerType(); 3267 assert(base_class_clang_type); 3268 if (class_language == eLanguageTypeObjC) { 3269 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3270 } else { 3271 std::unique_ptr<clang::CXXBaseSpecifier> result = 3272 ast->CreateBaseClassSpecifier( 3273 base_class_clang_type.GetOpaqueQualType(), accessibility, 3274 is_virtual, is_base_of_class); 3275 if (!result) 3276 break; 3277 3278 base_classes.push_back(std::move(result)); 3279 3280 if (is_virtual) { 3281 // Do not specify any offset for virtual inheritance. The DWARF 3282 // produced by clang doesn't give us a constant offset, but gives 3283 // us a DWARF expressions that requires an actual object in memory. 3284 // the DW_AT_data_member_location for a virtual base class looks 3285 // like: 3286 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3287 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3288 // DW_OP_plus ) 3289 // Given this, there is really no valid response we can give to 3290 // clang for virtual base class offsets, and this should eventually 3291 // be removed from LayoutRecordType() in the external 3292 // AST source in clang. 3293 } else { 3294 layout_info.base_offsets.insert(std::make_pair( 3295 ast->GetAsCXXRecordDecl( 3296 base_class_clang_type.GetOpaqueQualType()), 3297 clang::CharUnits::fromQuantity(member_byte_offset))); 3298 } 3299 } 3300 } 3301 } break; 3302 3303 default: 3304 break; 3305 } 3306 } 3307 3308 return true; 3309 } 3310 3311 size_t DWARFASTParserClang::ParseChildParameters( 3312 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3313 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3314 bool &is_variadic, bool &has_template_params, 3315 std::vector<CompilerType> &function_param_types, 3316 std::vector<clang::ParmVarDecl *> &function_param_decls, 3317 unsigned &type_quals) { 3318 if (!parent_die) 3319 return 0; 3320 3321 size_t arg_idx = 0; 3322 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3323 die = die.GetSibling()) { 3324 const dw_tag_t tag = die.Tag(); 3325 switch (tag) { 3326 case DW_TAG_formal_parameter: { 3327 DWARFAttributes attributes; 3328 const size_t num_attributes = die.GetAttributes(attributes); 3329 if (num_attributes > 0) { 3330 const char *name = NULL; 3331 Declaration decl; 3332 DWARFFormValue param_type_die_form; 3333 bool is_artificial = false; 3334 // one of None, Auto, Register, Extern, Static, PrivateExtern 3335 3336 clang::StorageClass storage = clang::SC_None; 3337 uint32_t i; 3338 for (i = 0; i < num_attributes; ++i) { 3339 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3340 DWARFFormValue form_value; 3341 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3342 switch (attr) { 3343 case DW_AT_decl_file: 3344 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3345 form_value.Unsigned())); 3346 break; 3347 case DW_AT_decl_line: 3348 decl.SetLine(form_value.Unsigned()); 3349 break; 3350 case DW_AT_decl_column: 3351 decl.SetColumn(form_value.Unsigned()); 3352 break; 3353 case DW_AT_name: 3354 name = form_value.AsCString(); 3355 break; 3356 case DW_AT_type: 3357 param_type_die_form = form_value; 3358 break; 3359 case DW_AT_artificial: 3360 is_artificial = form_value.Boolean(); 3361 break; 3362 case DW_AT_location: 3363 case DW_AT_const_value: 3364 case DW_AT_default_value: 3365 case DW_AT_description: 3366 case DW_AT_endianity: 3367 case DW_AT_is_optional: 3368 case DW_AT_segment: 3369 case DW_AT_variable_parameter: 3370 default: 3371 case DW_AT_abstract_origin: 3372 case DW_AT_sibling: 3373 break; 3374 } 3375 } 3376 } 3377 3378 bool skip = false; 3379 if (skip_artificial && is_artificial) { 3380 // In order to determine if a C++ member function is "const" we 3381 // have to look at the const-ness of "this"... 3382 if (arg_idx == 0 && 3383 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3384 // Often times compilers omit the "this" name for the 3385 // specification DIEs, so we can't rely upon the name being in 3386 // the formal parameter DIE... 3387 (name == NULL || ::strcmp(name, "this") == 0)) { 3388 Type *this_type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3389 if (this_type) { 3390 uint32_t encoding_mask = this_type->GetEncodingMask(); 3391 if (encoding_mask & Type::eEncodingIsPointerUID) { 3392 is_static = false; 3393 3394 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3395 type_quals |= clang::Qualifiers::Const; 3396 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3397 type_quals |= clang::Qualifiers::Volatile; 3398 } 3399 } 3400 } 3401 skip = true; 3402 } 3403 3404 if (!skip) { 3405 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3406 if (type) { 3407 function_param_types.push_back(type->GetForwardCompilerType()); 3408 3409 clang::ParmVarDecl *param_var_decl = 3410 m_ast.CreateParameterDeclaration( 3411 name, type->GetForwardCompilerType(), storage); 3412 assert(param_var_decl); 3413 function_param_decls.push_back(param_var_decl); 3414 3415 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3416 } 3417 } 3418 } 3419 arg_idx++; 3420 } break; 3421 3422 case DW_TAG_unspecified_parameters: 3423 is_variadic = true; 3424 break; 3425 3426 case DW_TAG_template_type_parameter: 3427 case DW_TAG_template_value_parameter: 3428 case DW_TAG_GNU_template_parameter_pack: 3429 // The one caller of this was never using the template_param_infos, and 3430 // the local variable was taking up a large amount of stack space in 3431 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3432 // template params back, we can add them back. 3433 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3434 has_template_params = true; 3435 break; 3436 3437 default: 3438 break; 3439 } 3440 } 3441 return arg_idx; 3442 } 3443 3444 llvm::Optional<SymbolFile::ArrayInfo> 3445 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3446 const ExecutionContext *exe_ctx) { 3447 SymbolFile::ArrayInfo array_info; 3448 if (!parent_die) 3449 return llvm::None; 3450 3451 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3452 die = die.GetSibling()) { 3453 const dw_tag_t tag = die.Tag(); 3454 switch (tag) { 3455 case DW_TAG_subrange_type: { 3456 DWARFAttributes attributes; 3457 const size_t num_child_attributes = die.GetAttributes(attributes); 3458 if (num_child_attributes > 0) { 3459 uint64_t num_elements = 0; 3460 uint64_t lower_bound = 0; 3461 uint64_t upper_bound = 0; 3462 bool upper_bound_valid = false; 3463 uint32_t i; 3464 for (i = 0; i < num_child_attributes; ++i) { 3465 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3466 DWARFFormValue form_value; 3467 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3468 switch (attr) { 3469 case DW_AT_name: 3470 break; 3471 3472 case DW_AT_count: 3473 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3474 if (var_die.Tag() == DW_TAG_variable) 3475 if (exe_ctx) { 3476 if (auto frame = exe_ctx->GetFrameSP()) { 3477 Status error; 3478 lldb::VariableSP var_sp; 3479 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3480 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3481 error); 3482 if (valobj_sp) { 3483 num_elements = valobj_sp->GetValueAsUnsigned(0); 3484 break; 3485 } 3486 } 3487 } 3488 } else 3489 num_elements = form_value.Unsigned(); 3490 break; 3491 3492 case DW_AT_bit_stride: 3493 array_info.bit_stride = form_value.Unsigned(); 3494 break; 3495 3496 case DW_AT_byte_stride: 3497 array_info.byte_stride = form_value.Unsigned(); 3498 break; 3499 3500 case DW_AT_lower_bound: 3501 lower_bound = form_value.Unsigned(); 3502 break; 3503 3504 case DW_AT_upper_bound: 3505 upper_bound_valid = true; 3506 upper_bound = form_value.Unsigned(); 3507 break; 3508 3509 default: 3510 case DW_AT_abstract_origin: 3511 case DW_AT_accessibility: 3512 case DW_AT_allocated: 3513 case DW_AT_associated: 3514 case DW_AT_data_location: 3515 case DW_AT_declaration: 3516 case DW_AT_description: 3517 case DW_AT_sibling: 3518 case DW_AT_threads_scaled: 3519 case DW_AT_type: 3520 case DW_AT_visibility: 3521 break; 3522 } 3523 } 3524 } 3525 3526 if (num_elements == 0) { 3527 if (upper_bound_valid && upper_bound >= lower_bound) 3528 num_elements = upper_bound - lower_bound + 1; 3529 } 3530 3531 array_info.element_orders.push_back(num_elements); 3532 } 3533 } break; 3534 } 3535 } 3536 return array_info; 3537 } 3538 3539 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3540 if (die) { 3541 SymbolFileDWARF *dwarf = die.GetDWARF(); 3542 DWARFAttributes attributes; 3543 const size_t num_attributes = die.GetAttributes(attributes); 3544 if (num_attributes > 0) { 3545 DWARFFormValue type_die_form; 3546 for (size_t i = 0; i < num_attributes; ++i) { 3547 dw_attr_t attr = attributes.AttributeAtIndex(i); 3548 DWARFFormValue form_value; 3549 3550 if (attr == DW_AT_type && 3551 attributes.ExtractFormValueAtIndex(i, form_value)) 3552 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3553 } 3554 } 3555 } 3556 3557 return nullptr; 3558 } 3559 3560 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3561 if (!die) 3562 return nullptr; 3563 3564 switch (die.Tag()) { 3565 case DW_TAG_variable: 3566 case DW_TAG_constant: 3567 case DW_TAG_formal_parameter: 3568 case DW_TAG_imported_declaration: 3569 case DW_TAG_imported_module: 3570 break; 3571 default: 3572 return nullptr; 3573 } 3574 3575 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3576 if (cache_pos != m_die_to_decl.end()) 3577 return cache_pos->second; 3578 3579 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3580 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3581 m_die_to_decl[die.GetDIE()] = decl; 3582 m_decl_to_die[decl].insert(die.GetDIE()); 3583 return decl; 3584 } 3585 3586 if (DWARFDIE abstract_origin_die = 3587 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3588 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3589 m_die_to_decl[die.GetDIE()] = decl; 3590 m_decl_to_die[decl].insert(die.GetDIE()); 3591 return decl; 3592 } 3593 3594 clang::Decl *decl = nullptr; 3595 switch (die.Tag()) { 3596 case DW_TAG_variable: 3597 case DW_TAG_constant: 3598 case DW_TAG_formal_parameter: { 3599 SymbolFileDWARF *dwarf = die.GetDWARF(); 3600 Type *type = GetTypeForDIE(die); 3601 if (dwarf && type) { 3602 const char *name = die.GetName(); 3603 clang::DeclContext *decl_context = 3604 ClangASTContext::DeclContextGetAsDeclContext( 3605 dwarf->GetDeclContextContainingUID(die.GetID())); 3606 decl = m_ast.CreateVariableDeclaration( 3607 decl_context, name, 3608 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3609 } 3610 break; 3611 } 3612 case DW_TAG_imported_declaration: { 3613 SymbolFileDWARF *dwarf = die.GetDWARF(); 3614 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3615 if (imported_uid) { 3616 CompilerDecl imported_decl = imported_uid.GetDecl(); 3617 if (imported_decl) { 3618 clang::DeclContext *decl_context = 3619 ClangASTContext::DeclContextGetAsDeclContext( 3620 dwarf->GetDeclContextContainingUID(die.GetID())); 3621 if (clang::NamedDecl *clang_imported_decl = 3622 llvm::dyn_cast<clang::NamedDecl>( 3623 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3624 decl = 3625 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3626 } 3627 } 3628 break; 3629 } 3630 case DW_TAG_imported_module: { 3631 SymbolFileDWARF *dwarf = die.GetDWARF(); 3632 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3633 3634 if (imported_uid) { 3635 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3636 if (imported_decl_ctx) { 3637 clang::DeclContext *decl_context = 3638 ClangASTContext::DeclContextGetAsDeclContext( 3639 dwarf->GetDeclContextContainingUID(die.GetID())); 3640 if (clang::NamespaceDecl *ns_decl = 3641 ClangASTContext::DeclContextGetAsNamespaceDecl( 3642 imported_decl_ctx)) 3643 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3644 } 3645 } 3646 break; 3647 } 3648 default: 3649 break; 3650 } 3651 3652 m_die_to_decl[die.GetDIE()] = decl; 3653 m_decl_to_die[decl].insert(die.GetDIE()); 3654 3655 return decl; 3656 } 3657 3658 clang::DeclContext * 3659 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3660 if (die) { 3661 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3662 if (decl_ctx) 3663 return decl_ctx; 3664 3665 bool try_parsing_type = true; 3666 switch (die.Tag()) { 3667 case DW_TAG_compile_unit: 3668 case DW_TAG_partial_unit: 3669 decl_ctx = m_ast.GetTranslationUnitDecl(); 3670 try_parsing_type = false; 3671 break; 3672 3673 case DW_TAG_namespace: 3674 decl_ctx = ResolveNamespaceDIE(die); 3675 try_parsing_type = false; 3676 break; 3677 3678 case DW_TAG_lexical_block: 3679 decl_ctx = GetDeclContextForBlock(die); 3680 try_parsing_type = false; 3681 break; 3682 3683 default: 3684 break; 3685 } 3686 3687 if (decl_ctx == nullptr && try_parsing_type) { 3688 Type *type = die.GetDWARF()->ResolveType(die); 3689 if (type) 3690 decl_ctx = GetCachedClangDeclContextForDIE(die); 3691 } 3692 3693 if (decl_ctx) { 3694 LinkDeclContextToDIE(decl_ctx, die); 3695 return decl_ctx; 3696 } 3697 } 3698 return nullptr; 3699 } 3700 3701 static bool IsSubroutine(const DWARFDIE &die) { 3702 switch (die.Tag()) { 3703 case DW_TAG_subprogram: 3704 case DW_TAG_inlined_subroutine: 3705 return true; 3706 default: 3707 return false; 3708 } 3709 } 3710 3711 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3712 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3713 if (IsSubroutine(candidate)) { 3714 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3715 return candidate; 3716 } else { 3717 return DWARFDIE(); 3718 } 3719 } 3720 } 3721 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3722 "something not in a function"); 3723 return DWARFDIE(); 3724 } 3725 3726 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3727 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3728 candidate = candidate.GetSibling()) { 3729 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3730 return candidate; 3731 } 3732 } 3733 return DWARFDIE(); 3734 } 3735 3736 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3737 const DWARFDIE &function) { 3738 assert(IsSubroutine(function)); 3739 for (DWARFDIE context = block; context != function.GetParent(); 3740 context = context.GetParent()) { 3741 assert(!IsSubroutine(context) || context == function); 3742 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3743 return child; 3744 } 3745 } 3746 return DWARFDIE(); 3747 } 3748 3749 clang::DeclContext * 3750 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3751 assert(die.Tag() == DW_TAG_lexical_block); 3752 DWARFDIE containing_function_with_abstract_origin = 3753 GetContainingFunctionWithAbstractOrigin(die); 3754 if (!containing_function_with_abstract_origin) { 3755 return (clang::DeclContext *)ResolveBlockDIE(die); 3756 } 3757 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3758 die, containing_function_with_abstract_origin); 3759 CompilerDeclContext decl_context = 3760 GetDeclContextContainingUIDFromDWARF(child); 3761 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3762 } 3763 3764 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3765 if (die && die.Tag() == DW_TAG_lexical_block) { 3766 clang::BlockDecl *decl = 3767 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3768 3769 if (!decl) { 3770 DWARFDIE decl_context_die; 3771 clang::DeclContext *decl_context = 3772 GetClangDeclContextContainingDIE(die, &decl_context_die); 3773 decl = m_ast.CreateBlockDeclaration(decl_context); 3774 3775 if (decl) 3776 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3777 } 3778 3779 return decl; 3780 } 3781 return nullptr; 3782 } 3783 3784 clang::NamespaceDecl * 3785 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3786 if (die && die.Tag() == DW_TAG_namespace) { 3787 // See if we already parsed this namespace DIE and associated it with a 3788 // uniqued namespace declaration 3789 clang::NamespaceDecl *namespace_decl = 3790 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3791 if (namespace_decl) 3792 return namespace_decl; 3793 else { 3794 const char *namespace_name = die.GetName(); 3795 clang::DeclContext *containing_decl_ctx = 3796 GetClangDeclContextContainingDIE(die, nullptr); 3797 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3798 containing_decl_ctx); 3799 Log *log = 3800 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3801 if (log) { 3802 SymbolFileDWARF *dwarf = die.GetDWARF(); 3803 if (namespace_name) { 3804 dwarf->GetObjectFile()->GetModule()->LogMessage( 3805 log, "ASTContext => %p: 0x%8.8" PRIx64 3806 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3807 "clang::NamespaceDecl *%p (original = %p)", 3808 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3809 namespace_name, static_cast<void *>(namespace_decl), 3810 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3811 } else { 3812 dwarf->GetObjectFile()->GetModule()->LogMessage( 3813 log, "ASTContext => %p: 0x%8.8" PRIx64 3814 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3815 "(original = %p)", 3816 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3817 static_cast<void *>(namespace_decl), 3818 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3819 } 3820 } 3821 3822 if (namespace_decl) 3823 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3824 return namespace_decl; 3825 } 3826 } 3827 return nullptr; 3828 } 3829 3830 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3831 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3832 SymbolFileDWARF *dwarf = die.GetDWARF(); 3833 3834 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3835 3836 if (decl_ctx_die_copy) 3837 *decl_ctx_die_copy = decl_ctx_die; 3838 3839 if (decl_ctx_die) { 3840 clang::DeclContext *clang_decl_ctx = 3841 GetClangDeclContextForDIE(decl_ctx_die); 3842 if (clang_decl_ctx) 3843 return clang_decl_ctx; 3844 } 3845 return m_ast.GetTranslationUnitDecl(); 3846 } 3847 3848 clang::DeclContext * 3849 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3850 if (die) { 3851 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3852 if (pos != m_die_to_decl_ctx.end()) 3853 return pos->second; 3854 } 3855 return nullptr; 3856 } 3857 3858 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3859 const DWARFDIE &die) { 3860 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3861 // There can be many DIEs for a single decl context 3862 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3863 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3864 } 3865 3866 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3867 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3868 lldb_private::Type *class_type, DWARFDIECollection &failures) { 3869 if (!class_type || !src_class_die || !dst_class_die) 3870 return false; 3871 if (src_class_die.Tag() != dst_class_die.Tag()) 3872 return false; 3873 3874 // We need to complete the class type so we can get all of the method types 3875 // parsed so we can then unique those types to their equivalent counterparts 3876 // in "dst_cu" and "dst_class_die" 3877 class_type->GetFullCompilerType(); 3878 3879 DWARFDIE src_die; 3880 DWARFDIE dst_die; 3881 UniqueCStringMap<DWARFDIE> src_name_to_die; 3882 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3883 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3884 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3885 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3886 src_die = src_die.GetSibling()) { 3887 if (src_die.Tag() == DW_TAG_subprogram) { 3888 // Make sure this is a declaration and not a concrete instance by looking 3889 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3890 // are placed inside the class definitions and shouldn't be included in 3891 // the list of things are are tracking here. 3892 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3893 const char *src_name = src_die.GetMangledName(); 3894 if (src_name) { 3895 ConstString src_const_name(src_name); 3896 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3897 src_name_to_die_artificial.Append(src_const_name, src_die); 3898 else 3899 src_name_to_die.Append(src_const_name, src_die); 3900 } 3901 } 3902 } 3903 } 3904 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3905 dst_die = dst_die.GetSibling()) { 3906 if (dst_die.Tag() == DW_TAG_subprogram) { 3907 // Make sure this is a declaration and not a concrete instance by looking 3908 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3909 // are placed inside the class definitions and shouldn't be included in 3910 // the list of things are are tracking here. 3911 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3912 const char *dst_name = dst_die.GetMangledName(); 3913 if (dst_name) { 3914 ConstString dst_const_name(dst_name); 3915 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3916 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3917 else 3918 dst_name_to_die.Append(dst_const_name, dst_die); 3919 } 3920 } 3921 } 3922 } 3923 const uint32_t src_size = src_name_to_die.GetSize(); 3924 const uint32_t dst_size = dst_name_to_die.GetSize(); 3925 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3926 // DWARF_LOG_TYPE_COMPLETION)); 3927 3928 // Is everything kosher so we can go through the members at top speed? 3929 bool fast_path = true; 3930 3931 if (src_size != dst_size) { 3932 if (src_size != 0 && dst_size != 0) { 3933 if (log) 3934 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3935 "but they didn't have the same size (src=%d, dst=%d)", 3936 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3937 src_size, dst_size); 3938 } 3939 3940 fast_path = false; 3941 } 3942 3943 uint32_t idx; 3944 3945 if (fast_path) { 3946 for (idx = 0; idx < src_size; ++idx) { 3947 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3948 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3949 3950 if (src_die.Tag() != dst_die.Tag()) { 3951 if (log) 3952 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3953 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3954 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3955 src_die.GetOffset(), src_die.GetTagAsCString(), 3956 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3957 fast_path = false; 3958 } 3959 3960 const char *src_name = src_die.GetMangledName(); 3961 const char *dst_name = dst_die.GetMangledName(); 3962 3963 // Make sure the names match 3964 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3965 continue; 3966 3967 if (log) 3968 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3969 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3970 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3971 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3972 dst_name); 3973 3974 fast_path = false; 3975 } 3976 } 3977 3978 DWARFASTParserClang *src_dwarf_ast_parser = 3979 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3980 DWARFASTParserClang *dst_dwarf_ast_parser = 3981 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3982 3983 // Now do the work of linking the DeclContexts and Types. 3984 if (fast_path) { 3985 // We can do this quickly. Just run across the tables index-for-index 3986 // since we know each node has matching names and tags. 3987 for (idx = 0; idx < src_size; ++idx) { 3988 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3989 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3990 3991 clang::DeclContext *src_decl_ctx = 3992 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3993 if (src_decl_ctx) { 3994 if (log) 3995 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3996 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3997 dst_die.GetOffset()); 3998 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3999 } else { 4000 if (log) 4001 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4002 "0x%8.8x, but none was found", 4003 src_die.GetOffset(), dst_die.GetOffset()); 4004 } 4005 4006 Type *src_child_type = 4007 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4008 if (src_child_type) { 4009 if (log) 4010 log->Printf( 4011 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4012 static_cast<void *>(src_child_type), src_child_type->GetID(), 4013 src_die.GetOffset(), dst_die.GetOffset()); 4014 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4015 } else { 4016 if (log) 4017 log->Printf("warning: tried to unique lldb_private::Type from " 4018 "0x%8.8x for 0x%8.8x, but none was found", 4019 src_die.GetOffset(), dst_die.GetOffset()); 4020 } 4021 } 4022 } else { 4023 // We must do this slowly. For each member of the destination, look up a 4024 // member in the source with the same name, check its tag, and unique them 4025 // if everything matches up. Report failures. 4026 4027 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4028 src_name_to_die.Sort(); 4029 4030 for (idx = 0; idx < dst_size; ++idx) { 4031 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4032 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4033 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4034 4035 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4036 clang::DeclContext *src_decl_ctx = 4037 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4038 if (src_decl_ctx) { 4039 if (log) 4040 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4041 static_cast<void *>(src_decl_ctx), 4042 src_die.GetOffset(), dst_die.GetOffset()); 4043 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4044 } else { 4045 if (log) 4046 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4047 "for 0x%8.8x, but none was found", 4048 src_die.GetOffset(), dst_die.GetOffset()); 4049 } 4050 4051 Type *src_child_type = 4052 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4053 if (src_child_type) { 4054 if (log) 4055 log->Printf("uniquing type %p (uid=0x%" PRIx64 4056 ") from 0x%8.8x for 0x%8.8x", 4057 static_cast<void *>(src_child_type), 4058 src_child_type->GetID(), src_die.GetOffset(), 4059 dst_die.GetOffset()); 4060 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4061 src_child_type; 4062 } else { 4063 if (log) 4064 log->Printf("warning: tried to unique lldb_private::Type from " 4065 "0x%8.8x for 0x%8.8x, but none was found", 4066 src_die.GetOffset(), dst_die.GetOffset()); 4067 } 4068 } else { 4069 if (log) 4070 log->Printf("warning: couldn't find a match for 0x%8.8x", 4071 dst_die.GetOffset()); 4072 4073 failures.Append(dst_die); 4074 } 4075 } 4076 } 4077 } 4078 4079 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4080 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4081 4082 if (src_size_artificial && dst_size_artificial) { 4083 dst_name_to_die_artificial.Sort(); 4084 4085 for (idx = 0; idx < src_size_artificial; ++idx) { 4086 ConstString src_name_artificial = 4087 src_name_to_die_artificial.GetCStringAtIndex(idx); 4088 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4089 dst_die = 4090 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4091 4092 if (dst_die) { 4093 // Both classes have the artificial types, link them 4094 clang::DeclContext *src_decl_ctx = 4095 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4096 if (src_decl_ctx) { 4097 if (log) 4098 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4099 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4100 dst_die.GetOffset()); 4101 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4102 } else { 4103 if (log) 4104 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4105 "for 0x%8.8x, but none was found", 4106 src_die.GetOffset(), dst_die.GetOffset()); 4107 } 4108 4109 Type *src_child_type = 4110 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4111 if (src_child_type) { 4112 if (log) 4113 log->Printf( 4114 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4115 static_cast<void *>(src_child_type), src_child_type->GetID(), 4116 src_die.GetOffset(), dst_die.GetOffset()); 4117 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4118 } else { 4119 if (log) 4120 log->Printf("warning: tried to unique lldb_private::Type from " 4121 "0x%8.8x for 0x%8.8x, but none was found", 4122 src_die.GetOffset(), dst_die.GetOffset()); 4123 } 4124 } 4125 } 4126 } 4127 4128 if (dst_size_artificial) { 4129 for (idx = 0; idx < dst_size_artificial; ++idx) { 4130 ConstString dst_name_artificial = 4131 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4132 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4133 if (log) 4134 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4135 "method '%s'", 4136 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4137 4138 failures.Append(dst_die); 4139 } 4140 } 4141 4142 return (failures.Size() != 0); 4143 } 4144