1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include <stdlib.h> 11 12 #include "DWARFASTParserClang.h" 13 #include "DWARFDIE.h" 14 #include "DWARFDIECollection.h" 15 #include "DWARFDebugInfo.h" 16 #include "DWARFDeclContext.h" 17 #include "DWARFDefines.h" 18 #include "SymbolFileDWARF.h" 19 #include "SymbolFileDWARFDwo.h" 20 #include "SymbolFileDWARFDebugMap.h" 21 #include "UniqueDWARFASTType.h" 22 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/ClangASTImporter.h" 28 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 29 #include "lldb/Symbol/ClangUtil.h" 30 #include "lldb/Symbol/CompileUnit.h" 31 #include "lldb/Symbol/Function.h" 32 #include "lldb/Symbol/ObjectFile.h" 33 #include "lldb/Symbol/SymbolVendor.h" 34 #include "lldb/Symbol/TypeList.h" 35 #include "lldb/Symbol/TypeMap.h" 36 #include "lldb/Target/Language.h" 37 #include "lldb/Utility/LLDBAssert.h" 38 #include "lldb/Utility/Log.h" 39 #include "lldb/Utility/StreamString.h" 40 41 #include "clang/AST/CXXInheritance.h" 42 #include "clang/AST/DeclCXX.h" 43 #include "clang/AST/DeclObjC.h" 44 #include "clang/AST/DeclTemplate.h" 45 46 #include <map> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 struct BitfieldInfo { 91 uint64_t bit_size; 92 uint64_t bit_offset; 93 94 BitfieldInfo() 95 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 96 97 void Clear() { 98 bit_size = LLDB_INVALID_ADDRESS; 99 bit_offset = LLDB_INVALID_ADDRESS; 100 } 101 102 bool IsValid() const { 103 return (bit_size != LLDB_INVALID_ADDRESS) && 104 (bit_offset != LLDB_INVALID_ADDRESS); 105 } 106 107 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 108 if (IsValid()) { 109 // This bitfield info is valid, so any subsequent bitfields 110 // must not overlap and must be at a higher bit offset than 111 // any previous bitfield + size. 112 return (bit_size + bit_offset) <= next_bit_offset; 113 } else { 114 // If the this BitfieldInfo is not valid, then any offset isOK 115 return true; 116 } 117 } 118 }; 119 120 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 121 if (!m_clang_ast_importer_ap) { 122 m_clang_ast_importer_ap.reset(new ClangASTImporter); 123 } 124 return *m_clang_ast_importer_ap; 125 } 126 127 /// Detect a forward declaration that is nested in a DW_TAG_module. 128 static bool isClangModuleFwdDecl(const DWARFDIE &Die) { 129 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 130 return false; 131 auto Parent = Die.GetParent(); 132 while (Parent.IsValid()) { 133 if (Parent.Tag() == DW_TAG_module) 134 return true; 135 Parent = Parent.GetParent(); 136 } 137 return false; 138 } 139 140 TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 141 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 142 if (!dwo_module_sp) 143 return TypeSP(); 144 145 // This type comes from an external DWO module. 146 std::vector<CompilerContext> dwo_context; 147 die.GetDWOContext(dwo_context); 148 TypeMap dwo_types; 149 150 if (!dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 151 dwo_types)) { 152 if (!isClangModuleFwdDecl(die)) 153 return TypeSP(); 154 155 // Since this this type is defined in one of the Clang modules 156 // imported by this symbol file, search all of them. 157 auto *SymFile = die.GetCU()->GetSymbolFileDWARF(); 158 for (const auto &NameModule : SymFile->getExternalTypeModules()) { 159 if (!NameModule.second) 160 continue; 161 SymbolVendor *SymVendor = NameModule.second->GetSymbolVendor(); 162 if (SymVendor->FindTypes(dwo_context, true, dwo_types)) 163 break; 164 } 165 } 166 167 const size_t num_dwo_types = dwo_types.GetSize(); 168 if (num_dwo_types != 1) 169 return TypeSP(); 170 171 // We found a real definition for this type in the Clang module, so 172 // lets use it and cache the fact that we found a complete type for 173 // this die. 174 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 175 if (!dwo_type_sp) 176 return TypeSP(); 177 178 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 179 180 lldb_private::CompilerType type = 181 GetClangASTImporter().CopyType(m_ast, dwo_type); 182 183 if (!type) 184 return TypeSP(); 185 186 SymbolFileDWARF *dwarf = die.GetDWARF(); 187 TypeSP type_sp(new Type( 188 die.GetID(), dwarf, dwo_type_sp->GetName(), dwo_type_sp->GetByteSize(), 189 NULL, LLDB_INVALID_UID, Type::eEncodingInvalid, 190 &dwo_type_sp->GetDeclaration(), type, Type::eResolveStateForward)); 191 192 dwarf->GetTypeList()->Insert(type_sp); 193 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 194 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 195 if (tag_decl) 196 LinkDeclContextToDIE(tag_decl, die); 197 else { 198 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 199 if (defn_decl_ctx) 200 LinkDeclContextToDIE(defn_decl_ctx, die); 201 } 202 203 return type_sp; 204 } 205 206 static void CompleteExternalTagDeclType(ClangASTImporter &ast_importer, 207 clang::DeclContext *decl_ctx, 208 DWARFDIE die, 209 const char *type_name_cstr) { 210 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 211 if (!tag_decl_ctx) 212 return; 213 214 // If this type was not imported from an external AST, there's 215 // nothing to do. 216 CompilerType type = ClangASTContext::GetTypeForDecl(tag_decl_ctx); 217 if (!type || !ast_importer.CanImport(type)) 218 return; 219 220 auto qual_type = ClangUtil::GetQualType(type); 221 if (!ast_importer.RequireCompleteType(qual_type)) { 222 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 223 "Unable to complete the Decl context for DIE '%s' at offset " 224 "0x%8.8x.\nPlease file a bug report.", 225 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 226 // We need to make the type look complete otherwise, we 227 // might crash in Clang when adding children. 228 if (ClangASTContext::StartTagDeclarationDefinition(type)) 229 ClangASTContext::CompleteTagDeclarationDefinition(type); 230 } 231 } 232 233 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 234 const DWARFDIE &die, Log *log, 235 bool *type_is_new_ptr) { 236 TypeSP type_sp; 237 238 if (type_is_new_ptr) 239 *type_is_new_ptr = false; 240 241 AccessType accessibility = eAccessNone; 242 if (die) { 243 SymbolFileDWARF *dwarf = die.GetDWARF(); 244 if (log) { 245 DWARFDIE context_die; 246 clang::DeclContext *context = 247 GetClangDeclContextContainingDIE(die, &context_die); 248 249 dwarf->GetObjectFile()->GetModule()->LogMessage( 250 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 251 "0x%8.8x)) %s name = '%s')", 252 die.GetOffset(), static_cast<void *>(context), 253 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 254 } 255 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 256 TypeList *type_list = dwarf->GetTypeList(); 257 if (type_ptr == NULL) { 258 if (type_is_new_ptr) 259 *type_is_new_ptr = true; 260 261 const dw_tag_t tag = die.Tag(); 262 263 bool is_forward_declaration = false; 264 DWARFAttributes attributes; 265 const char *type_name_cstr = NULL; 266 const char *mangled_name_cstr = NULL; 267 ConstString type_name_const_str; 268 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 269 uint64_t byte_size = 0; 270 Declaration decl; 271 272 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 273 CompilerType clang_type; 274 DWARFFormValue form_value; 275 276 dw_attr_t attr; 277 278 switch (tag) { 279 case DW_TAG_typedef: 280 case DW_TAG_base_type: 281 case DW_TAG_pointer_type: 282 case DW_TAG_reference_type: 283 case DW_TAG_rvalue_reference_type: 284 case DW_TAG_const_type: 285 case DW_TAG_restrict_type: 286 case DW_TAG_volatile_type: 287 case DW_TAG_unspecified_type: { 288 // Set a bit that lets us know that we are currently parsing this 289 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 290 291 const size_t num_attributes = die.GetAttributes(attributes); 292 uint32_t encoding = 0; 293 DWARFFormValue encoding_uid; 294 295 if (num_attributes > 0) { 296 uint32_t i; 297 for (i = 0; i < num_attributes; ++i) { 298 attr = attributes.AttributeAtIndex(i); 299 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 300 switch (attr) { 301 case DW_AT_decl_file: 302 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 303 form_value.Unsigned())); 304 break; 305 case DW_AT_decl_line: 306 decl.SetLine(form_value.Unsigned()); 307 break; 308 case DW_AT_decl_column: 309 decl.SetColumn(form_value.Unsigned()); 310 break; 311 case DW_AT_name: 312 313 type_name_cstr = form_value.AsCString(); 314 // Work around a bug in llvm-gcc where they give a name to a 315 // reference type which doesn't 316 // include the "&"... 317 if (tag == DW_TAG_reference_type) { 318 if (strchr(type_name_cstr, '&') == NULL) 319 type_name_cstr = NULL; 320 } 321 if (type_name_cstr) 322 type_name_const_str.SetCString(type_name_cstr); 323 break; 324 case DW_AT_byte_size: 325 byte_size = form_value.Unsigned(); 326 break; 327 case DW_AT_encoding: 328 encoding = form_value.Unsigned(); 329 break; 330 case DW_AT_type: 331 encoding_uid = form_value; 332 break; 333 default: 334 case DW_AT_sibling: 335 break; 336 } 337 } 338 } 339 } 340 341 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 342 // Try to parse a typedef from the DWO file first as modules 343 // can contain typedef'ed structures that have no names like: 344 // 345 // typedef struct { int a; } Foo; 346 // 347 // In this case we will have a structure with no name and a 348 // typedef named "Foo" that points to this unnamed structure. 349 // The name in the typedef is the only identifier for the struct, 350 // so always try to get typedefs from DWO files if possible. 351 // 352 // The type_sp returned will be empty if the typedef doesn't exist 353 // in a DWO file, so it is cheap to call this function just to check. 354 // 355 // If we don't do this we end up creating a TypeSP that says this 356 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 357 // in the DW_TAG_typedef), and this is the unnamed structure type. 358 // We will have a hard time tracking down an unnammed structure 359 // type in the module DWO file, so we make sure we don't get into 360 // this situation by always resolving typedefs from the DWO file. 361 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 362 363 // First make sure that the die that this is typedef'ed to _is_ 364 // just a declaration (DW_AT_declaration == 1), not a full definition 365 // since template types can't be represented in modules since only 366 // concrete instances of templates are ever emitted and modules 367 // won't contain those 368 if (encoding_die && 369 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 370 1) { 371 type_sp = ParseTypeFromDWO(die, log); 372 if (type_sp) 373 return type_sp; 374 } 375 } 376 377 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 378 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 379 encoding_uid.Reference()); 380 381 switch (tag) { 382 default: 383 break; 384 385 case DW_TAG_unspecified_type: 386 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 387 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 388 resolve_state = Type::eResolveStateFull; 389 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 390 break; 391 } 392 // Fall through to base type below in case we can handle the type 393 // there... 394 LLVM_FALLTHROUGH; 395 396 case DW_TAG_base_type: 397 resolve_state = Type::eResolveStateFull; 398 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 399 type_name_cstr, encoding, byte_size * 8); 400 break; 401 402 case DW_TAG_pointer_type: 403 encoding_data_type = Type::eEncodingIsPointerUID; 404 break; 405 case DW_TAG_reference_type: 406 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 407 break; 408 case DW_TAG_rvalue_reference_type: 409 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 410 break; 411 case DW_TAG_typedef: 412 encoding_data_type = Type::eEncodingIsTypedefUID; 413 break; 414 case DW_TAG_const_type: 415 encoding_data_type = Type::eEncodingIsConstUID; 416 break; 417 case DW_TAG_restrict_type: 418 encoding_data_type = Type::eEncodingIsRestrictUID; 419 break; 420 case DW_TAG_volatile_type: 421 encoding_data_type = Type::eEncodingIsVolatileUID; 422 break; 423 } 424 425 if (!clang_type && 426 (encoding_data_type == Type::eEncodingIsPointerUID || 427 encoding_data_type == Type::eEncodingIsTypedefUID) && 428 sc.comp_unit != NULL) { 429 if (tag == DW_TAG_pointer_type) { 430 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 431 432 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 433 // Blocks have a __FuncPtr inside them which is a pointer to a 434 // function of the proper type. 435 436 for (DWARFDIE child_die = target_die.GetFirstChild(); 437 child_die.IsValid(); child_die = child_die.GetSibling()) { 438 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 439 "__FuncPtr")) { 440 DWARFDIE function_pointer_type = 441 child_die.GetReferencedDIE(DW_AT_type); 442 443 if (function_pointer_type) { 444 DWARFDIE function_type = 445 function_pointer_type.GetReferencedDIE(DW_AT_type); 446 447 bool function_type_is_new_pointer; 448 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 449 sc, function_type, log, &function_type_is_new_pointer); 450 451 if (lldb_function_type_sp) { 452 clang_type = m_ast.CreateBlockPointerType( 453 lldb_function_type_sp->GetForwardCompilerType()); 454 encoding_data_type = Type::eEncodingIsUID; 455 encoding_uid.Clear(); 456 resolve_state = Type::eResolveStateFull; 457 } 458 } 459 460 break; 461 } 462 } 463 } 464 } 465 466 bool translation_unit_is_objc = 467 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 468 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 469 470 if (translation_unit_is_objc) { 471 if (type_name_cstr != NULL) { 472 static ConstString g_objc_type_name_id("id"); 473 static ConstString g_objc_type_name_Class("Class"); 474 static ConstString g_objc_type_name_selector("SEL"); 475 476 if (type_name_const_str == g_objc_type_name_id) { 477 if (log) 478 dwarf->GetObjectFile()->GetModule()->LogMessage( 479 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 480 "is Objective C 'id' built-in type.", 481 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 482 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 483 encoding_data_type = Type::eEncodingIsUID; 484 encoding_uid.Clear(); 485 resolve_state = Type::eResolveStateFull; 486 487 } else if (type_name_const_str == g_objc_type_name_Class) { 488 if (log) 489 dwarf->GetObjectFile()->GetModule()->LogMessage( 490 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 491 "is Objective C 'Class' built-in type.", 492 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 493 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 494 encoding_data_type = Type::eEncodingIsUID; 495 encoding_uid.Clear(); 496 resolve_state = Type::eResolveStateFull; 497 } else if (type_name_const_str == g_objc_type_name_selector) { 498 if (log) 499 dwarf->GetObjectFile()->GetModule()->LogMessage( 500 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 501 "is Objective C 'selector' built-in type.", 502 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 503 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 504 encoding_data_type = Type::eEncodingIsUID; 505 encoding_uid.Clear(); 506 resolve_state = Type::eResolveStateFull; 507 } 508 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 509 encoding_uid.IsValid()) { 510 // Clang sometimes erroneously emits id as objc_object*. In that 511 // case we fix up the type to "id". 512 513 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 514 515 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 516 if (const char *struct_name = encoding_die.GetName()) { 517 if (!strcmp(struct_name, "objc_object")) { 518 if (log) 519 dwarf->GetObjectFile()->GetModule()->LogMessage( 520 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 521 "'%s' is 'objc_object*', which we overrode to " 522 "'id'.", 523 die.GetOffset(), die.GetTagAsCString(), 524 die.GetName()); 525 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 526 encoding_data_type = Type::eEncodingIsUID; 527 encoding_uid.Clear(); 528 resolve_state = Type::eResolveStateFull; 529 } 530 } 531 } 532 } 533 } 534 } 535 536 type_sp.reset( 537 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 538 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 539 &decl, clang_type, resolve_state)); 540 541 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 542 } break; 543 544 case DW_TAG_structure_type: 545 case DW_TAG_union_type: 546 case DW_TAG_class_type: { 547 // Set a bit that lets us know that we are currently parsing this 548 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 549 bool byte_size_valid = false; 550 551 LanguageType class_language = eLanguageTypeUnknown; 552 bool is_complete_objc_class = false; 553 size_t calling_convention 554 = llvm::dwarf::CallingConvention::DW_CC_normal; 555 556 const size_t num_attributes = die.GetAttributes(attributes); 557 if (num_attributes > 0) { 558 uint32_t i; 559 for (i = 0; i < num_attributes; ++i) { 560 attr = attributes.AttributeAtIndex(i); 561 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 562 switch (attr) { 563 case DW_AT_decl_file: 564 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) { 565 // llvm-gcc outputs invalid DW_AT_decl_file attributes that 566 // always 567 // point to the compile unit file, so we clear this invalid 568 // value 569 // so that we can still unique types efficiently. 570 decl.SetFile(FileSpec("<invalid>", false)); 571 } else 572 decl.SetFile( 573 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 574 form_value.Unsigned())); 575 break; 576 577 case DW_AT_decl_line: 578 decl.SetLine(form_value.Unsigned()); 579 break; 580 581 case DW_AT_decl_column: 582 decl.SetColumn(form_value.Unsigned()); 583 break; 584 585 case DW_AT_name: 586 type_name_cstr = form_value.AsCString(); 587 type_name_const_str.SetCString(type_name_cstr); 588 break; 589 590 case DW_AT_byte_size: 591 byte_size = form_value.Unsigned(); 592 byte_size_valid = true; 593 break; 594 595 case DW_AT_accessibility: 596 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 597 break; 598 599 case DW_AT_declaration: 600 is_forward_declaration = form_value.Boolean(); 601 break; 602 603 case DW_AT_APPLE_runtime_class: 604 class_language = (LanguageType)form_value.Signed(); 605 break; 606 607 case DW_AT_APPLE_objc_complete_type: 608 is_complete_objc_class = form_value.Signed(); 609 break; 610 case DW_AT_calling_convention: 611 calling_convention = form_value.Unsigned(); 612 break; 613 614 case DW_AT_allocated: 615 case DW_AT_associated: 616 case DW_AT_data_location: 617 case DW_AT_description: 618 case DW_AT_start_scope: 619 case DW_AT_visibility: 620 default: 621 case DW_AT_sibling: 622 break; 623 } 624 } 625 } 626 } 627 628 // UniqueDWARFASTType is large, so don't create a local variables on the 629 // stack, put it on the heap. This function is often called recursively 630 // and clang isn't good and sharing the stack space for variables in 631 // different blocks. 632 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 633 new UniqueDWARFASTType()); 634 635 ConstString unique_typename(type_name_const_str); 636 Declaration unique_decl(decl); 637 638 if (type_name_const_str) { 639 LanguageType die_language = die.GetLanguage(); 640 if (Language::LanguageIsCPlusPlus(die_language)) { 641 // For C++, we rely solely upon the one definition rule that says 642 // only 643 // one thing can exist at a given decl context. We ignore the file 644 // and 645 // line that things are declared on. 646 std::string qualified_name; 647 if (die.GetQualifiedName(qualified_name)) 648 unique_typename = ConstString(qualified_name); 649 unique_decl.Clear(); 650 } 651 652 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 653 unique_typename, die, unique_decl, 654 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 655 type_sp = unique_ast_entry_ap->m_type_sp; 656 if (type_sp) { 657 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 658 return type_sp; 659 } 660 } 661 } 662 663 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 664 DW_TAG_value_to_name(tag), type_name_cstr); 665 666 int tag_decl_kind = -1; 667 AccessType default_accessibility = eAccessNone; 668 if (tag == DW_TAG_structure_type) { 669 tag_decl_kind = clang::TTK_Struct; 670 default_accessibility = eAccessPublic; 671 } else if (tag == DW_TAG_union_type) { 672 tag_decl_kind = clang::TTK_Union; 673 default_accessibility = eAccessPublic; 674 } else if (tag == DW_TAG_class_type) { 675 tag_decl_kind = clang::TTK_Class; 676 default_accessibility = eAccessPrivate; 677 } 678 679 if (byte_size_valid && byte_size == 0 && type_name_cstr && 680 die.HasChildren() == false && 681 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 682 // Work around an issue with clang at the moment where 683 // forward declarations for objective C classes are emitted 684 // as: 685 // DW_TAG_structure_type [2] 686 // DW_AT_name( "ForwardObjcClass" ) 687 // DW_AT_byte_size( 0x00 ) 688 // DW_AT_decl_file( "..." ) 689 // DW_AT_decl_line( 1 ) 690 // 691 // Note that there is no DW_AT_declaration and there are 692 // no children, and the byte size is zero. 693 is_forward_declaration = true; 694 } 695 696 if (class_language == eLanguageTypeObjC || 697 class_language == eLanguageTypeObjC_plus_plus) { 698 if (!is_complete_objc_class && 699 die.Supports_DW_AT_APPLE_objc_complete_type()) { 700 // We have a valid eSymbolTypeObjCClass class symbol whose 701 // name matches the current objective C class that we 702 // are trying to find and this DIE isn't the complete 703 // definition (we checked is_complete_objc_class above and 704 // know it is false), so the real definition is in here somewhere 705 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 706 die, type_name_const_str, true); 707 708 if (!type_sp) { 709 SymbolFileDWARFDebugMap *debug_map_symfile = 710 dwarf->GetDebugMapSymfile(); 711 if (debug_map_symfile) { 712 // We weren't able to find a full declaration in 713 // this DWARF, see if we have a declaration anywhere 714 // else... 715 type_sp = 716 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 717 die, type_name_const_str, true); 718 } 719 } 720 721 if (type_sp) { 722 if (log) { 723 dwarf->GetObjectFile()->GetModule()->LogMessage( 724 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 725 "incomplete objc type, complete type is 0x%8.8" PRIx64, 726 static_cast<void *>(this), die.GetOffset(), 727 DW_TAG_value_to_name(tag), type_name_cstr, 728 type_sp->GetID()); 729 } 730 731 // We found a real definition for this type elsewhere 732 // so lets use it and cache the fact that we found 733 // a complete type for this die 734 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 735 return type_sp; 736 } 737 } 738 } 739 740 if (is_forward_declaration) { 741 // We have a forward declaration to a type and we need 742 // to try and find a full declaration. We look in the 743 // current type index just in case we have a forward 744 // declaration followed by an actual declarations in the 745 // DWARF. If this fails, we need to look elsewhere... 746 if (log) { 747 dwarf->GetObjectFile()->GetModule()->LogMessage( 748 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 749 "forward declaration, trying to find complete type", 750 static_cast<void *>(this), die.GetOffset(), 751 DW_TAG_value_to_name(tag), type_name_cstr); 752 } 753 754 // See if the type comes from a DWO module and if so, track down that 755 // type. 756 type_sp = ParseTypeFromDWO(die, log); 757 if (type_sp) 758 return type_sp; 759 760 DWARFDeclContext die_decl_ctx; 761 die.GetDWARFDeclContext(die_decl_ctx); 762 763 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 764 // type_name_const_str); 765 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 766 767 if (!type_sp) { 768 SymbolFileDWARFDebugMap *debug_map_symfile = 769 dwarf->GetDebugMapSymfile(); 770 if (debug_map_symfile) { 771 // We weren't able to find a full declaration in 772 // this DWARF, see if we have a declaration anywhere 773 // else... 774 type_sp = 775 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 776 die_decl_ctx); 777 } 778 } 779 780 if (type_sp) { 781 if (log) { 782 dwarf->GetObjectFile()->GetModule()->LogMessage( 783 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 784 "forward declaration, complete type is 0x%8.8" PRIx64, 785 static_cast<void *>(this), die.GetOffset(), 786 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 787 } 788 789 // We found a real definition for this type elsewhere 790 // so lets use it and cache the fact that we found 791 // a complete type for this die 792 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 793 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 794 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 795 if (defn_decl_ctx) 796 LinkDeclContextToDIE(defn_decl_ctx, die); 797 return type_sp; 798 } 799 } 800 assert(tag_decl_kind != -1); 801 bool clang_type_was_created = false; 802 clang_type.SetCompilerType( 803 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 804 if (!clang_type) { 805 clang::DeclContext *decl_ctx = 806 GetClangDeclContextContainingDIE(die, nullptr); 807 808 // If your decl context is a record that was imported from 809 // another AST context (in the gmodules case), we need to 810 // make sure the type backing the Decl is complete before 811 // adding children to it. This is not an issue in the 812 // non-gmodules case because the debug info will always contain 813 // a full definition of parent types in that case. 814 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die, 815 type_name_cstr); 816 817 if (accessibility == eAccessNone && decl_ctx) { 818 // Check the decl context that contains this class/struct/union. 819 // If it is a class we must give it an accessibility. 820 const clang::Decl::Kind containing_decl_kind = 821 decl_ctx->getDeclKind(); 822 if (DeclKindIsCXXClass(containing_decl_kind)) 823 accessibility = default_accessibility; 824 } 825 826 ClangASTMetadata metadata; 827 metadata.SetUserID(die.GetID()); 828 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 829 830 if (type_name_cstr && strchr(type_name_cstr, '<')) { 831 ClangASTContext::TemplateParameterInfos template_param_infos; 832 if (ParseTemplateParameterInfos(die, template_param_infos)) { 833 clang::ClassTemplateDecl *class_template_decl = 834 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 835 type_name_cstr, tag_decl_kind, 836 template_param_infos); 837 if (!class_template_decl) { 838 if (log) { 839 dwarf->GetObjectFile()->GetModule()->LogMessage( 840 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 841 "clang::ClassTemplateDecl failed to return a decl.", 842 static_cast<void *>(this), die.GetOffset(), 843 DW_TAG_value_to_name(tag), type_name_cstr); 844 } 845 return TypeSP(); 846 } 847 848 clang::ClassTemplateSpecializationDecl 849 *class_specialization_decl = 850 m_ast.CreateClassTemplateSpecializationDecl( 851 decl_ctx, class_template_decl, tag_decl_kind, 852 template_param_infos); 853 clang_type = m_ast.CreateClassTemplateSpecializationType( 854 class_specialization_decl); 855 clang_type_was_created = true; 856 857 m_ast.SetMetadata(class_template_decl, metadata); 858 m_ast.SetMetadata(class_specialization_decl, metadata); 859 } 860 } 861 862 if (!clang_type_was_created) { 863 clang_type_was_created = true; 864 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 865 type_name_cstr, tag_decl_kind, 866 class_language, &metadata); 867 } 868 } 869 870 // Store a forward declaration to this class type in case any 871 // parameters in any class methods need it for the clang 872 // types for function prototypes. 873 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 874 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 875 byte_size, NULL, LLDB_INVALID_UID, 876 Type::eEncodingIsUID, &decl, clang_type, 877 Type::eResolveStateForward)); 878 879 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 880 881 // Add our type to the unique type map so we don't 882 // end up creating many copies of the same type over 883 // and over in the ASTContext for our module 884 unique_ast_entry_ap->m_type_sp = type_sp; 885 unique_ast_entry_ap->m_die = die; 886 unique_ast_entry_ap->m_declaration = unique_decl; 887 unique_ast_entry_ap->m_byte_size = byte_size; 888 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 889 *unique_ast_entry_ap); 890 891 if (is_forward_declaration && die.HasChildren()) { 892 // Check to see if the DIE actually has a definition, some version of 893 // GCC will 894 // emit DIEs with DW_AT_declaration set to true, but yet still have 895 // subprogram, 896 // members, or inheritance, so we can't trust it 897 DWARFDIE child_die = die.GetFirstChild(); 898 while (child_die) { 899 switch (child_die.Tag()) { 900 case DW_TAG_inheritance: 901 case DW_TAG_subprogram: 902 case DW_TAG_member: 903 case DW_TAG_APPLE_property: 904 case DW_TAG_class_type: 905 case DW_TAG_structure_type: 906 case DW_TAG_enumeration_type: 907 case DW_TAG_typedef: 908 case DW_TAG_union_type: 909 child_die.Clear(); 910 is_forward_declaration = false; 911 break; 912 default: 913 child_die = child_die.GetSibling(); 914 break; 915 } 916 } 917 } 918 919 if (!is_forward_declaration) { 920 // Always start the definition for a class type so that 921 // if the class has child classes or types that require 922 // the class to be created for use as their decl contexts 923 // the class will be ready to accept these child definitions. 924 if (die.HasChildren() == false) { 925 // No children for this struct/union/class, lets finish it 926 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 927 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 928 } else { 929 dwarf->GetObjectFile()->GetModule()->ReportError( 930 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 931 "definition.\nPlease file a bug and attach the file at the " 932 "start of this error message", 933 die.GetOffset(), type_name_cstr); 934 } 935 936 if (tag == DW_TAG_structure_type) // this only applies in C 937 { 938 clang::RecordDecl *record_decl = 939 ClangASTContext::GetAsRecordDecl(clang_type); 940 941 if (record_decl) { 942 GetClangASTImporter().InsertRecordDecl( 943 record_decl, ClangASTImporter::LayoutInfo()); 944 } 945 } 946 } else if (clang_type_was_created) { 947 // Start the definition if the class is not objective C since 948 // the underlying decls respond to isCompleteDefinition(). Objective 949 // C decls don't respond to isCompleteDefinition() so we can't 950 // start the declaration definition right away. For C++ 951 // class/union/structs 952 // we want to start the definition in case the class is needed as 953 // the 954 // declaration context for a contained class or type without the 955 // need 956 // to complete that type.. 957 958 if (class_language != eLanguageTypeObjC && 959 class_language != eLanguageTypeObjC_plus_plus) 960 ClangASTContext::StartTagDeclarationDefinition(clang_type); 961 962 // Leave this as a forward declaration until we need 963 // to know the details of the type. lldb_private::Type 964 // will automatically call the SymbolFile virtual function 965 // "SymbolFileDWARF::CompleteType(Type *)" 966 // When the definition needs to be defined. 967 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 968 ClangUtil::RemoveFastQualifiers(clang_type) 969 .GetOpaqueQualType()) && 970 "Type already in the forward declaration map!"); 971 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 972 // it can be a 973 // SymbolFileDWARFDebugMap for Apple binaries. 974 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 975 clang_type.GetOpaqueQualType(); 976 dwarf->GetForwardDeclClangTypeToDie() 977 [ClangUtil::RemoveFastQualifiers(clang_type) 978 .GetOpaqueQualType()] = die.GetDIERef(); 979 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 980 } 981 } 982 983 // If we made a clang type, set the trivial abi if applicable: 984 // We only do this for pass by value - which implies the Trivial ABI. 985 // There isn't a way to assert that something that would normally be 986 // pass by value is pass by reference, so we ignore that attribute if 987 // set. 988 if (calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 989 clang::CXXRecordDecl *record_decl = 990 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 991 if (record_decl) { 992 record_decl->setHasTrivialSpecialMemberForCall(); 993 } 994 } 995 996 } break; 997 998 case DW_TAG_enumeration_type: { 999 // Set a bit that lets us know that we are currently parsing this 1000 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1001 1002 bool is_scoped = false; 1003 DWARFFormValue encoding_form; 1004 1005 const size_t num_attributes = die.GetAttributes(attributes); 1006 if (num_attributes > 0) { 1007 uint32_t i; 1008 1009 for (i = 0; i < num_attributes; ++i) { 1010 attr = attributes.AttributeAtIndex(i); 1011 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1012 switch (attr) { 1013 case DW_AT_decl_file: 1014 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1015 form_value.Unsigned())); 1016 break; 1017 case DW_AT_decl_line: 1018 decl.SetLine(form_value.Unsigned()); 1019 break; 1020 case DW_AT_decl_column: 1021 decl.SetColumn(form_value.Unsigned()); 1022 break; 1023 case DW_AT_name: 1024 type_name_cstr = form_value.AsCString(); 1025 type_name_const_str.SetCString(type_name_cstr); 1026 break; 1027 case DW_AT_type: 1028 encoding_form = form_value; 1029 break; 1030 case DW_AT_byte_size: 1031 byte_size = form_value.Unsigned(); 1032 break; 1033 case DW_AT_accessibility: 1034 break; // accessibility = 1035 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1036 case DW_AT_declaration: 1037 is_forward_declaration = form_value.Boolean(); 1038 break; 1039 case DW_AT_enum_class: 1040 is_scoped = form_value.Boolean(); 1041 break; 1042 case DW_AT_allocated: 1043 case DW_AT_associated: 1044 case DW_AT_bit_stride: 1045 case DW_AT_byte_stride: 1046 case DW_AT_data_location: 1047 case DW_AT_description: 1048 case DW_AT_start_scope: 1049 case DW_AT_visibility: 1050 case DW_AT_specification: 1051 case DW_AT_abstract_origin: 1052 case DW_AT_sibling: 1053 break; 1054 } 1055 } 1056 } 1057 1058 if (is_forward_declaration) { 1059 type_sp = ParseTypeFromDWO(die, log); 1060 if (type_sp) 1061 return type_sp; 1062 1063 DWARFDeclContext die_decl_ctx; 1064 die.GetDWARFDeclContext(die_decl_ctx); 1065 1066 type_sp = 1067 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1068 1069 if (!type_sp) { 1070 SymbolFileDWARFDebugMap *debug_map_symfile = 1071 dwarf->GetDebugMapSymfile(); 1072 if (debug_map_symfile) { 1073 // We weren't able to find a full declaration in 1074 // this DWARF, see if we have a declaration anywhere 1075 // else... 1076 type_sp = 1077 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1078 die_decl_ctx); 1079 } 1080 } 1081 1082 if (type_sp) { 1083 if (log) { 1084 dwarf->GetObjectFile()->GetModule()->LogMessage( 1085 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1086 "forward declaration, complete type is 0x%8.8" PRIx64, 1087 static_cast<void *>(this), die.GetOffset(), 1088 DW_TAG_value_to_name(tag), type_name_cstr, 1089 type_sp->GetID()); 1090 } 1091 1092 // We found a real definition for this type elsewhere 1093 // so lets use it and cache the fact that we found 1094 // a complete type for this die 1095 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1096 clang::DeclContext *defn_decl_ctx = 1097 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1098 DIERef(type_sp->GetID(), dwarf))); 1099 if (defn_decl_ctx) 1100 LinkDeclContextToDIE(defn_decl_ctx, die); 1101 return type_sp; 1102 } 1103 } 1104 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1105 DW_TAG_value_to_name(tag), type_name_cstr); 1106 1107 CompilerType enumerator_clang_type; 1108 clang_type.SetCompilerType( 1109 &m_ast, 1110 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1111 if (!clang_type) { 1112 if (encoding_form.IsValid()) { 1113 Type *enumerator_type = 1114 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1115 if (enumerator_type) 1116 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1117 } 1118 1119 if (!enumerator_clang_type) { 1120 if (byte_size > 0) { 1121 enumerator_clang_type = 1122 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1123 NULL, DW_ATE_signed, byte_size * 8); 1124 } else { 1125 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1126 } 1127 } 1128 1129 clang_type = m_ast.CreateEnumerationType( 1130 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1131 decl, enumerator_clang_type, is_scoped); 1132 } else { 1133 enumerator_clang_type = 1134 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1135 } 1136 1137 LinkDeclContextToDIE( 1138 ClangASTContext::GetDeclContextForType(clang_type), die); 1139 1140 type_sp.reset(new Type( 1141 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1142 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1143 clang_type, Type::eResolveStateForward)); 1144 1145 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1146 if (die.HasChildren()) { 1147 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1148 bool is_signed = false; 1149 enumerator_clang_type.IsIntegerType(is_signed); 1150 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1151 type_sp->GetByteSize(), die); 1152 } 1153 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1154 } else { 1155 dwarf->GetObjectFile()->GetModule()->ReportError( 1156 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1157 "definition.\nPlease file a bug and attach the file at the " 1158 "start of this error message", 1159 die.GetOffset(), type_name_cstr); 1160 } 1161 } 1162 } break; 1163 1164 case DW_TAG_inlined_subroutine: 1165 case DW_TAG_subprogram: 1166 case DW_TAG_subroutine_type: { 1167 // Set a bit that lets us know that we are currently parsing this 1168 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1169 1170 DWARFFormValue type_die_form; 1171 bool is_variadic = false; 1172 bool is_inline = false; 1173 bool is_static = false; 1174 bool is_virtual = false; 1175 bool is_explicit = false; 1176 bool is_artificial = false; 1177 bool has_template_params = false; 1178 DWARFFormValue specification_die_form; 1179 DWARFFormValue abstract_origin_die_form; 1180 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1181 1182 unsigned type_quals = 0; 1183 clang::StorageClass storage = 1184 clang::SC_None; //, Extern, Static, PrivateExtern 1185 1186 const size_t num_attributes = die.GetAttributes(attributes); 1187 if (num_attributes > 0) { 1188 uint32_t i; 1189 for (i = 0; i < num_attributes; ++i) { 1190 attr = attributes.AttributeAtIndex(i); 1191 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1192 switch (attr) { 1193 case DW_AT_decl_file: 1194 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1195 form_value.Unsigned())); 1196 break; 1197 case DW_AT_decl_line: 1198 decl.SetLine(form_value.Unsigned()); 1199 break; 1200 case DW_AT_decl_column: 1201 decl.SetColumn(form_value.Unsigned()); 1202 break; 1203 case DW_AT_name: 1204 type_name_cstr = form_value.AsCString(); 1205 type_name_const_str.SetCString(type_name_cstr); 1206 break; 1207 1208 case DW_AT_linkage_name: 1209 case DW_AT_MIPS_linkage_name: 1210 mangled_name_cstr = form_value.AsCString(); 1211 break; 1212 case DW_AT_type: 1213 type_die_form = form_value; 1214 break; 1215 case DW_AT_accessibility: 1216 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1217 break; 1218 case DW_AT_declaration: 1219 break; // is_forward_declaration = form_value.Boolean(); break; 1220 case DW_AT_inline: 1221 is_inline = form_value.Boolean(); 1222 break; 1223 case DW_AT_virtuality: 1224 is_virtual = form_value.Boolean(); 1225 break; 1226 case DW_AT_explicit: 1227 is_explicit = form_value.Boolean(); 1228 break; 1229 case DW_AT_artificial: 1230 is_artificial = form_value.Boolean(); 1231 break; 1232 1233 case DW_AT_external: 1234 if (form_value.Unsigned()) { 1235 if (storage == clang::SC_None) 1236 storage = clang::SC_Extern; 1237 else 1238 storage = clang::SC_PrivateExtern; 1239 } 1240 break; 1241 1242 case DW_AT_specification: 1243 specification_die_form = form_value; 1244 break; 1245 1246 case DW_AT_abstract_origin: 1247 abstract_origin_die_form = form_value; 1248 break; 1249 1250 case DW_AT_object_pointer: 1251 object_pointer_die_offset = form_value.Reference(); 1252 break; 1253 1254 case DW_AT_allocated: 1255 case DW_AT_associated: 1256 case DW_AT_address_class: 1257 case DW_AT_calling_convention: 1258 case DW_AT_data_location: 1259 case DW_AT_elemental: 1260 case DW_AT_entry_pc: 1261 case DW_AT_frame_base: 1262 case DW_AT_high_pc: 1263 case DW_AT_low_pc: 1264 case DW_AT_prototyped: 1265 case DW_AT_pure: 1266 case DW_AT_ranges: 1267 case DW_AT_recursive: 1268 case DW_AT_return_addr: 1269 case DW_AT_segment: 1270 case DW_AT_start_scope: 1271 case DW_AT_static_link: 1272 case DW_AT_trampoline: 1273 case DW_AT_visibility: 1274 case DW_AT_vtable_elem_location: 1275 case DW_AT_description: 1276 case DW_AT_sibling: 1277 break; 1278 } 1279 } 1280 } 1281 } 1282 1283 std::string object_pointer_name; 1284 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1285 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1286 if (object_pointer_die) { 1287 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1288 if (object_pointer_name_cstr) 1289 object_pointer_name = object_pointer_name_cstr; 1290 } 1291 } 1292 1293 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1294 DW_TAG_value_to_name(tag), type_name_cstr); 1295 1296 CompilerType return_clang_type; 1297 Type *func_type = NULL; 1298 1299 if (type_die_form.IsValid()) 1300 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1301 1302 if (func_type) 1303 return_clang_type = func_type->GetForwardCompilerType(); 1304 else 1305 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1306 1307 std::vector<CompilerType> function_param_types; 1308 std::vector<clang::ParmVarDecl *> function_param_decls; 1309 1310 // Parse the function children for the parameters 1311 1312 DWARFDIE decl_ctx_die; 1313 clang::DeclContext *containing_decl_ctx = 1314 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1315 const clang::Decl::Kind containing_decl_kind = 1316 containing_decl_ctx->getDeclKind(); 1317 1318 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1319 // Start off static. This will be set to false in 1320 // ParseChildParameters(...) 1321 // if we find a "this" parameters as the first parameter 1322 if (is_cxx_method) { 1323 is_static = true; 1324 } 1325 1326 if (die.HasChildren()) { 1327 bool skip_artificial = true; 1328 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1329 is_static, is_variadic, has_template_params, 1330 function_param_types, function_param_decls, 1331 type_quals); 1332 } 1333 1334 bool ignore_containing_context = false; 1335 // Check for templatized class member functions. If we had any 1336 // DW_TAG_template_type_parameter 1337 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1338 // can't let this become 1339 // a method in a class. Why? Because templatized functions are only 1340 // emitted if one of the 1341 // templatized methods is used in the current compile unit and we will 1342 // end up with classes 1343 // that may or may not include these member functions and this means one 1344 // class won't match another 1345 // class definition and it affects our ability to use a class in the 1346 // clang expression parser. So 1347 // for the greater good, we currently must not allow any template member 1348 // functions in a class definition. 1349 if (is_cxx_method && has_template_params) { 1350 ignore_containing_context = true; 1351 is_cxx_method = false; 1352 } 1353 1354 // clang_type will get the function prototype clang type after this call 1355 clang_type = m_ast.CreateFunctionType( 1356 return_clang_type, function_param_types.data(), 1357 function_param_types.size(), is_variadic, type_quals); 1358 1359 if (type_name_cstr) { 1360 bool type_handled = false; 1361 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1362 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1363 if (objc_method.IsValid(true)) { 1364 CompilerType class_opaque_type; 1365 ConstString class_name(objc_method.GetClassName()); 1366 if (class_name) { 1367 TypeSP complete_objc_class_type_sp( 1368 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1369 DWARFDIE(), class_name, false)); 1370 1371 if (complete_objc_class_type_sp) { 1372 CompilerType type_clang_forward_type = 1373 complete_objc_class_type_sp->GetForwardCompilerType(); 1374 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1375 type_clang_forward_type)) 1376 class_opaque_type = type_clang_forward_type; 1377 } 1378 } 1379 1380 if (class_opaque_type) { 1381 // If accessibility isn't set to anything valid, assume public 1382 // for 1383 // now... 1384 if (accessibility == eAccessNone) 1385 accessibility = eAccessPublic; 1386 1387 clang::ObjCMethodDecl *objc_method_decl = 1388 m_ast.AddMethodToObjCObjectType( 1389 class_opaque_type, type_name_cstr, clang_type, 1390 accessibility, is_artificial, is_variadic); 1391 type_handled = objc_method_decl != NULL; 1392 if (type_handled) { 1393 LinkDeclContextToDIE( 1394 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1395 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1396 } else { 1397 dwarf->GetObjectFile()->GetModule()->ReportError( 1398 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1399 "please file a bug and attach the file at the start of " 1400 "this error message", 1401 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1402 } 1403 } 1404 } else if (is_cxx_method) { 1405 // Look at the parent of this DIE and see if is is 1406 // a class or struct and see if this is actually a 1407 // C++ method 1408 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1409 if (class_type) { 1410 bool alternate_defn = false; 1411 if (class_type->GetID() != decl_ctx_die.GetID() || 1412 decl_ctx_die.GetContainingDWOModuleDIE()) { 1413 alternate_defn = true; 1414 1415 // We uniqued the parent class of this function to another 1416 // class 1417 // so we now need to associate all dies under "decl_ctx_die" 1418 // to 1419 // DIEs in the DIE for "class_type"... 1420 SymbolFileDWARF *class_symfile = NULL; 1421 DWARFDIE class_type_die; 1422 1423 SymbolFileDWARFDebugMap *debug_map_symfile = 1424 dwarf->GetDebugMapSymfile(); 1425 if (debug_map_symfile) { 1426 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1427 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1428 class_type->GetID())); 1429 class_type_die = class_symfile->DebugInfo()->GetDIE( 1430 DIERef(class_type->GetID(), dwarf)); 1431 } else { 1432 class_symfile = dwarf; 1433 class_type_die = dwarf->DebugInfo()->GetDIE( 1434 DIERef(class_type->GetID(), dwarf)); 1435 } 1436 if (class_type_die) { 1437 DWARFDIECollection failures; 1438 1439 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1440 class_type, failures); 1441 1442 // FIXME do something with these failures that's smarter 1443 // than 1444 // just dropping them on the ground. Unfortunately classes 1445 // don't 1446 // like having stuff added to them after their definitions 1447 // are 1448 // complete... 1449 1450 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1451 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1452 type_sp = type_ptr->shared_from_this(); 1453 break; 1454 } 1455 } 1456 } 1457 1458 if (specification_die_form.IsValid()) { 1459 // We have a specification which we are going to base our 1460 // function 1461 // prototype off of, so we need this type to be completed so 1462 // that the 1463 // m_die_to_decl_ctx for the method in the specification has a 1464 // valid 1465 // clang decl context. 1466 class_type->GetForwardCompilerType(); 1467 // If we have a specification, then the function type should 1468 // have been 1469 // made with the specification and not with this die. 1470 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1471 DIERef(specification_die_form)); 1472 clang::DeclContext *spec_clang_decl_ctx = 1473 GetClangDeclContextForDIE(spec_die); 1474 if (spec_clang_decl_ctx) { 1475 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1476 } else { 1477 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1478 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1479 ") has no decl\n", 1480 die.GetID(), specification_die_form.Reference()); 1481 } 1482 type_handled = true; 1483 } else if (abstract_origin_die_form.IsValid()) { 1484 // We have a specification which we are going to base our 1485 // function 1486 // prototype off of, so we need this type to be completed so 1487 // that the 1488 // m_die_to_decl_ctx for the method in the abstract origin has 1489 // a valid 1490 // clang decl context. 1491 class_type->GetForwardCompilerType(); 1492 1493 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1494 DIERef(abstract_origin_die_form)); 1495 clang::DeclContext *abs_clang_decl_ctx = 1496 GetClangDeclContextForDIE(abs_die); 1497 if (abs_clang_decl_ctx) { 1498 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1499 } else { 1500 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1501 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1502 ") has no decl\n", 1503 die.GetID(), abstract_origin_die_form.Reference()); 1504 } 1505 type_handled = true; 1506 } else { 1507 CompilerType class_opaque_type = 1508 class_type->GetForwardCompilerType(); 1509 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1510 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1511 if (!is_static && !die.HasChildren()) { 1512 // We have a C++ member function with no children (this 1513 // pointer!) 1514 // and clang will get mad if we try and make a function 1515 // that isn't 1516 // well formed in the DWARF, so we will just skip it... 1517 type_handled = true; 1518 } else { 1519 bool add_method = true; 1520 if (alternate_defn) { 1521 // If an alternate definition for the class exists, 1522 // then add the method only if an 1523 // equivalent is not already present. 1524 clang::CXXRecordDecl *record_decl = 1525 m_ast.GetAsCXXRecordDecl( 1526 class_opaque_type.GetOpaqueQualType()); 1527 if (record_decl) { 1528 for (auto method_iter = record_decl->method_begin(); 1529 method_iter != record_decl->method_end(); 1530 method_iter++) { 1531 clang::CXXMethodDecl *method_decl = *method_iter; 1532 if (method_decl->getNameInfo().getAsString() == 1533 std::string(type_name_cstr)) { 1534 if (method_decl->getType() == 1535 ClangUtil::GetQualType(clang_type)) { 1536 add_method = false; 1537 LinkDeclContextToDIE( 1538 ClangASTContext::GetAsDeclContext( 1539 method_decl), 1540 die); 1541 type_handled = true; 1542 1543 break; 1544 } 1545 } 1546 } 1547 } 1548 } 1549 1550 if (add_method) { 1551 llvm::PrettyStackTraceFormat stack_trace( 1552 "SymbolFileDWARF::ParseType() is adding a method " 1553 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1554 type_name_cstr, 1555 class_type->GetName().GetCString(), die.GetID(), 1556 dwarf->GetObjectFile() 1557 ->GetFileSpec() 1558 .GetPath() 1559 .c_str()); 1560 1561 const bool is_attr_used = false; 1562 // Neither GCC 4.2 nor clang++ currently set a valid 1563 // accessibility 1564 // in the DWARF for C++ methods... Default to public 1565 // for now... 1566 if (accessibility == eAccessNone) 1567 accessibility = eAccessPublic; 1568 1569 clang::CXXMethodDecl *cxx_method_decl = 1570 m_ast.AddMethodToCXXRecordType( 1571 class_opaque_type.GetOpaqueQualType(), 1572 type_name_cstr, mangled_name_cstr, clang_type, 1573 accessibility, is_virtual, is_static, 1574 is_inline, is_explicit, is_attr_used, 1575 is_artificial); 1576 1577 type_handled = cxx_method_decl != NULL; 1578 1579 if (type_handled) { 1580 LinkDeclContextToDIE( 1581 ClangASTContext::GetAsDeclContext( 1582 cxx_method_decl), 1583 die); 1584 1585 ClangASTMetadata metadata; 1586 metadata.SetUserID(die.GetID()); 1587 1588 if (!object_pointer_name.empty()) { 1589 metadata.SetObjectPtrName( 1590 object_pointer_name.c_str()); 1591 if (log) 1592 log->Printf( 1593 "Setting object pointer name: %s on method " 1594 "object %p.\n", 1595 object_pointer_name.c_str(), 1596 static_cast<void *>(cxx_method_decl)); 1597 } 1598 m_ast.SetMetadata(cxx_method_decl, metadata); 1599 } else { 1600 ignore_containing_context = true; 1601 } 1602 } 1603 } 1604 } else { 1605 // We were asked to parse the type for a method in a 1606 // class, yet the 1607 // class hasn't been asked to complete itself through the 1608 // clang::ExternalASTSource protocol, so we need to just 1609 // have the 1610 // class complete itself and do things the right way, then 1611 // our 1612 // DIE should then have an entry in the 1613 // dwarf->GetDIEToType() map. First 1614 // we need to modify the dwarf->GetDIEToType() so it 1615 // doesn't think we are 1616 // trying to parse this DIE anymore... 1617 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1618 1619 // Now we get the full type to force our class type to 1620 // complete itself 1621 // using the clang::ExternalASTSource protocol which will 1622 // parse all 1623 // base classes and all methods (including the method for 1624 // this DIE). 1625 class_type->GetFullCompilerType(); 1626 1627 // The type for this DIE should have been filled in the 1628 // function call above 1629 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1630 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1631 type_sp = type_ptr->shared_from_this(); 1632 break; 1633 } 1634 1635 // FIXME This is fixing some even uglier behavior but we 1636 // really need to 1637 // uniq the methods of each class as well as the class 1638 // itself. 1639 // <rdar://problem/11240464> 1640 type_handled = true; 1641 } 1642 } 1643 } 1644 } 1645 } 1646 } 1647 1648 if (!type_handled) { 1649 clang::FunctionDecl *function_decl = nullptr; 1650 1651 if (abstract_origin_die_form.IsValid()) { 1652 DWARFDIE abs_die = 1653 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1654 1655 SymbolContext sc; 1656 1657 if (dwarf->ResolveType(abs_die)) { 1658 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1659 GetCachedClangDeclContextForDIE(abs_die)); 1660 1661 if (function_decl) { 1662 LinkDeclContextToDIE(function_decl, die); 1663 } 1664 } 1665 } 1666 1667 if (!function_decl) { 1668 // We just have a function that isn't part of a class 1669 function_decl = m_ast.CreateFunctionDeclaration( 1670 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1671 : containing_decl_ctx, 1672 type_name_cstr, clang_type, storage, is_inline); 1673 1674 if (has_template_params) { 1675 ClangASTContext::TemplateParameterInfos template_param_infos; 1676 ParseTemplateParameterInfos(die, template_param_infos); 1677 clang::FunctionTemplateDecl *func_template_decl = 1678 m_ast.CreateFunctionTemplateDecl( 1679 containing_decl_ctx, function_decl, type_name_cstr, 1680 template_param_infos); 1681 m_ast.CreateFunctionTemplateSpecializationInfo( 1682 function_decl, func_template_decl, template_param_infos); 1683 } 1684 1685 lldbassert(function_decl); 1686 1687 if (function_decl) { 1688 LinkDeclContextToDIE(function_decl, die); 1689 1690 if (!function_param_decls.empty()) 1691 m_ast.SetFunctionParameters(function_decl, 1692 &function_param_decls.front(), 1693 function_param_decls.size()); 1694 1695 ClangASTMetadata metadata; 1696 metadata.SetUserID(die.GetID()); 1697 1698 if (!object_pointer_name.empty()) { 1699 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1700 if (log) 1701 log->Printf("Setting object pointer name: %s on function " 1702 "object %p.", 1703 object_pointer_name.c_str(), 1704 static_cast<void *>(function_decl)); 1705 } 1706 m_ast.SetMetadata(function_decl, metadata); 1707 } 1708 } 1709 } 1710 } 1711 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1712 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1713 clang_type, Type::eResolveStateFull)); 1714 assert(type_sp.get()); 1715 } break; 1716 1717 case DW_TAG_array_type: { 1718 // Set a bit that lets us know that we are currently parsing this 1719 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1720 1721 DWARFFormValue type_die_form; 1722 int64_t first_index = 0; 1723 uint32_t byte_stride = 0; 1724 uint32_t bit_stride = 0; 1725 bool is_vector = false; 1726 const size_t num_attributes = die.GetAttributes(attributes); 1727 1728 if (num_attributes > 0) { 1729 uint32_t i; 1730 for (i = 0; i < num_attributes; ++i) { 1731 attr = attributes.AttributeAtIndex(i); 1732 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1733 switch (attr) { 1734 case DW_AT_decl_file: 1735 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1736 form_value.Unsigned())); 1737 break; 1738 case DW_AT_decl_line: 1739 decl.SetLine(form_value.Unsigned()); 1740 break; 1741 case DW_AT_decl_column: 1742 decl.SetColumn(form_value.Unsigned()); 1743 break; 1744 case DW_AT_name: 1745 type_name_cstr = form_value.AsCString(); 1746 type_name_const_str.SetCString(type_name_cstr); 1747 break; 1748 1749 case DW_AT_type: 1750 type_die_form = form_value; 1751 break; 1752 case DW_AT_byte_size: 1753 break; // byte_size = form_value.Unsigned(); break; 1754 case DW_AT_byte_stride: 1755 byte_stride = form_value.Unsigned(); 1756 break; 1757 case DW_AT_bit_stride: 1758 bit_stride = form_value.Unsigned(); 1759 break; 1760 case DW_AT_GNU_vector: 1761 is_vector = form_value.Boolean(); 1762 break; 1763 case DW_AT_accessibility: 1764 break; // accessibility = 1765 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1766 case DW_AT_declaration: 1767 break; // is_forward_declaration = form_value.Boolean(); break; 1768 case DW_AT_allocated: 1769 case DW_AT_associated: 1770 case DW_AT_data_location: 1771 case DW_AT_description: 1772 case DW_AT_ordering: 1773 case DW_AT_start_scope: 1774 case DW_AT_visibility: 1775 case DW_AT_specification: 1776 case DW_AT_abstract_origin: 1777 case DW_AT_sibling: 1778 break; 1779 } 1780 } 1781 } 1782 1783 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1784 DW_TAG_value_to_name(tag), type_name_cstr); 1785 1786 DIERef type_die_ref(type_die_form); 1787 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1788 1789 if (element_type) { 1790 std::vector<uint64_t> element_orders; 1791 ParseChildArrayInfo(sc, die, first_index, element_orders, 1792 byte_stride, bit_stride); 1793 if (byte_stride == 0 && bit_stride == 0) 1794 byte_stride = element_type->GetByteSize(); 1795 CompilerType array_element_type = 1796 element_type->GetForwardCompilerType(); 1797 1798 if (ClangASTContext::IsCXXClassType(array_element_type) && 1799 array_element_type.GetCompleteType() == false) { 1800 ModuleSP module_sp = die.GetModule(); 1801 if (module_sp) { 1802 if (die.GetCU()->GetProducer() == eProducerClang) 1803 module_sp->ReportError( 1804 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1805 "class/union/struct element type DIE 0x%8.8x that is a " 1806 "forward declaration, not a complete definition.\nTry " 1807 "compiling the source file with -fstandalone-debug or " 1808 "disable -gmodules", 1809 die.GetOffset(), type_die_ref.die_offset); 1810 else 1811 module_sp->ReportError( 1812 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1813 "class/union/struct element type DIE 0x%8.8x that is a " 1814 "forward declaration, not a complete definition.\nPlease " 1815 "file a bug against the compiler and include the " 1816 "preprocessed output for %s", 1817 die.GetOffset(), type_die_ref.die_offset, 1818 die.GetLLDBCompileUnit() 1819 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1820 : "the source file"); 1821 } 1822 1823 // We have no choice other than to pretend that the element class 1824 // type 1825 // is complete. If we don't do this, clang will crash when trying 1826 // to layout the class. Since we provide layout assistance, all 1827 // ivars in this class and other classes will be fine, this is 1828 // the best we can do short of crashing. 1829 if (ClangASTContext::StartTagDeclarationDefinition( 1830 array_element_type)) { 1831 ClangASTContext::CompleteTagDeclarationDefinition( 1832 array_element_type); 1833 } else { 1834 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1835 "start its definition.\nPlease file a " 1836 "bug and attach the file at the start " 1837 "of this error message", 1838 type_die_ref.die_offset); 1839 } 1840 } 1841 1842 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1843 if (element_orders.size() > 0) { 1844 uint64_t num_elements = 0; 1845 std::vector<uint64_t>::const_reverse_iterator pos; 1846 std::vector<uint64_t>::const_reverse_iterator end = 1847 element_orders.rend(); 1848 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1849 num_elements = *pos; 1850 clang_type = m_ast.CreateArrayType(array_element_type, 1851 num_elements, is_vector); 1852 array_element_type = clang_type; 1853 array_element_bit_stride = 1854 num_elements ? array_element_bit_stride * num_elements 1855 : array_element_bit_stride; 1856 } 1857 } else { 1858 clang_type = 1859 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1860 } 1861 ConstString empty_name; 1862 type_sp.reset(new Type( 1863 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1864 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1865 &decl, clang_type, Type::eResolveStateFull)); 1866 type_sp->SetEncodingType(element_type); 1867 } 1868 } 1869 } break; 1870 1871 case DW_TAG_ptr_to_member_type: { 1872 DWARFFormValue type_die_form; 1873 DWARFFormValue containing_type_die_form; 1874 1875 const size_t num_attributes = die.GetAttributes(attributes); 1876 1877 if (num_attributes > 0) { 1878 uint32_t i; 1879 for (i = 0; i < num_attributes; ++i) { 1880 attr = attributes.AttributeAtIndex(i); 1881 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1882 switch (attr) { 1883 case DW_AT_type: 1884 type_die_form = form_value; 1885 break; 1886 case DW_AT_containing_type: 1887 containing_type_die_form = form_value; 1888 break; 1889 } 1890 } 1891 } 1892 1893 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1894 Type *class_type = 1895 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1896 1897 CompilerType pointee_clang_type = 1898 pointee_type->GetForwardCompilerType(); 1899 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1900 1901 clang_type = ClangASTContext::CreateMemberPointerType( 1902 class_clang_type, pointee_clang_type); 1903 1904 byte_size = clang_type.GetByteSize(nullptr); 1905 1906 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1907 byte_size, NULL, LLDB_INVALID_UID, 1908 Type::eEncodingIsUID, NULL, clang_type, 1909 Type::eResolveStateForward)); 1910 } 1911 1912 break; 1913 } 1914 default: 1915 dwarf->GetObjectFile()->GetModule()->ReportError( 1916 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1917 "attach the file at the start of this error message", 1918 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1919 break; 1920 } 1921 1922 if (type_sp.get()) { 1923 DWARFDIE sc_parent_die = 1924 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1925 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1926 1927 SymbolContextScope *symbol_context_scope = NULL; 1928 if (sc_parent_tag == DW_TAG_compile_unit) { 1929 symbol_context_scope = sc.comp_unit; 1930 } else if (sc.function != NULL && sc_parent_die) { 1931 symbol_context_scope = 1932 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1933 if (symbol_context_scope == NULL) 1934 symbol_context_scope = sc.function; 1935 } 1936 1937 if (symbol_context_scope != NULL) { 1938 type_sp->SetSymbolContextScope(symbol_context_scope); 1939 } 1940 1941 // We are ready to put this type into the uniqued list up at the module 1942 // level 1943 type_list->Insert(type_sp); 1944 1945 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1946 } 1947 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1948 type_sp = type_ptr->shared_from_this(); 1949 } 1950 } 1951 return type_sp; 1952 } 1953 1954 // DWARF parsing functions 1955 1956 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1957 public: 1958 DelayedAddObjCClassProperty( 1959 const CompilerType &class_opaque_type, const char *property_name, 1960 const CompilerType &property_opaque_type, // The property type is only 1961 // required if you don't have an 1962 // ivar decl 1963 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1964 const char *property_getter_name, uint32_t property_attributes, 1965 const ClangASTMetadata *metadata) 1966 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1967 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1968 m_property_setter_name(property_setter_name), 1969 m_property_getter_name(property_getter_name), 1970 m_property_attributes(property_attributes) { 1971 if (metadata != NULL) { 1972 m_metadata_ap.reset(new ClangASTMetadata()); 1973 *m_metadata_ap = *metadata; 1974 } 1975 } 1976 1977 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1978 *this = rhs; 1979 } 1980 1981 DelayedAddObjCClassProperty & 1982 operator=(const DelayedAddObjCClassProperty &rhs) { 1983 m_class_opaque_type = rhs.m_class_opaque_type; 1984 m_property_name = rhs.m_property_name; 1985 m_property_opaque_type = rhs.m_property_opaque_type; 1986 m_ivar_decl = rhs.m_ivar_decl; 1987 m_property_setter_name = rhs.m_property_setter_name; 1988 m_property_getter_name = rhs.m_property_getter_name; 1989 m_property_attributes = rhs.m_property_attributes; 1990 1991 if (rhs.m_metadata_ap.get()) { 1992 m_metadata_ap.reset(new ClangASTMetadata()); 1993 *m_metadata_ap = *rhs.m_metadata_ap; 1994 } 1995 return *this; 1996 } 1997 1998 bool Finalize() { 1999 return ClangASTContext::AddObjCClassProperty( 2000 m_class_opaque_type, m_property_name, m_property_opaque_type, 2001 m_ivar_decl, m_property_setter_name, m_property_getter_name, 2002 m_property_attributes, m_metadata_ap.get()); 2003 } 2004 2005 private: 2006 CompilerType m_class_opaque_type; 2007 const char *m_property_name; 2008 CompilerType m_property_opaque_type; 2009 clang::ObjCIvarDecl *m_ivar_decl; 2010 const char *m_property_setter_name; 2011 const char *m_property_getter_name; 2012 uint32_t m_property_attributes; 2013 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 2014 }; 2015 2016 bool DWARFASTParserClang::ParseTemplateDIE( 2017 const DWARFDIE &die, 2018 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2019 const dw_tag_t tag = die.Tag(); 2020 bool is_template_template_argument = false; 2021 2022 switch (tag) { 2023 case DW_TAG_GNU_template_parameter_pack: { 2024 template_param_infos.packed_args.reset( 2025 new ClangASTContext::TemplateParameterInfos); 2026 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 2027 child_die = child_die.GetSibling()) { 2028 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 2029 return false; 2030 } 2031 if (const char *name = die.GetName()) { 2032 template_param_infos.pack_name = name; 2033 } 2034 return true; 2035 } 2036 case DW_TAG_GNU_template_template_param: 2037 is_template_template_argument = true; 2038 LLVM_FALLTHROUGH; 2039 case DW_TAG_template_type_parameter: 2040 case DW_TAG_template_value_parameter: { 2041 DWARFAttributes attributes; 2042 const size_t num_attributes = die.GetAttributes(attributes); 2043 const char *name = nullptr; 2044 const char *template_name = nullptr; 2045 CompilerType clang_type; 2046 uint64_t uval64 = 0; 2047 bool uval64_valid = false; 2048 if (num_attributes > 0) { 2049 DWARFFormValue form_value; 2050 for (size_t i = 0; i < num_attributes; ++i) { 2051 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2052 2053 switch (attr) { 2054 case DW_AT_name: 2055 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2056 name = form_value.AsCString(); 2057 break; 2058 2059 case DW_AT_GNU_template_name: 2060 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2061 template_name = form_value.AsCString(); 2062 break; 2063 2064 case DW_AT_type: 2065 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2066 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2067 if (lldb_type) 2068 clang_type = lldb_type->GetForwardCompilerType(); 2069 } 2070 break; 2071 2072 case DW_AT_const_value: 2073 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2074 uval64_valid = true; 2075 uval64 = form_value.Unsigned(); 2076 } 2077 break; 2078 default: 2079 break; 2080 } 2081 } 2082 2083 clang::ASTContext *ast = m_ast.getASTContext(); 2084 if (!clang_type) 2085 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2086 2087 if (!is_template_template_argument) { 2088 bool is_signed = false; 2089 if (name && name[0]) 2090 template_param_infos.names.push_back(name); 2091 else 2092 template_param_infos.names.push_back(NULL); 2093 2094 // Get the signed value for any integer or enumeration if available 2095 clang_type.IsIntegerOrEnumerationType(is_signed); 2096 2097 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2098 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2099 template_param_infos.args.push_back( 2100 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2101 ClangUtil::GetQualType(clang_type))); 2102 } else { 2103 template_param_infos.args.push_back( 2104 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2105 } 2106 } else { 2107 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2108 template_param_infos.names.push_back(name); 2109 template_param_infos.args.push_back( 2110 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2111 } 2112 } 2113 } 2114 return true; 2115 2116 default: 2117 break; 2118 } 2119 return false; 2120 } 2121 2122 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2123 const DWARFDIE &parent_die, 2124 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2125 2126 if (!parent_die) 2127 return false; 2128 2129 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2130 die = die.GetSibling()) { 2131 const dw_tag_t tag = die.Tag(); 2132 2133 switch (tag) { 2134 case DW_TAG_template_type_parameter: 2135 case DW_TAG_template_value_parameter: 2136 case DW_TAG_GNU_template_parameter_pack: 2137 case DW_TAG_GNU_template_template_param: 2138 ParseTemplateDIE(die, template_param_infos); 2139 break; 2140 2141 default: 2142 break; 2143 } 2144 } 2145 if (template_param_infos.args.empty()) 2146 return false; 2147 return template_param_infos.args.size() == template_param_infos.names.size(); 2148 } 2149 2150 // Checks whether m1 is an overload of m2 (as opposed to an override). 2151 // This is called by addOverridesForMethod to distinguish overrides (which share 2152 // a vtable entry) from overloads (which require distinct entries). 2153 static bool isOverload(clang::CXXMethodDecl *m1, clang::CXXMethodDecl *m2) { 2154 // FIXME: This should detect covariant return types, but currently doesn't. 2155 lldbassert(&m1->getASTContext() == &m2->getASTContext() && 2156 "Methods should have the same AST context"); 2157 clang::ASTContext &context = m1->getASTContext(); 2158 2159 const auto *m1Type = 2160 llvm::cast<clang::FunctionProtoType>( 2161 context.getCanonicalType(m1->getType())); 2162 2163 const auto *m2Type = 2164 llvm::cast<clang::FunctionProtoType>( 2165 context.getCanonicalType(m2->getType())); 2166 2167 auto compareArgTypes = 2168 [&context](const clang::QualType &m1p, const clang::QualType &m2p) { 2169 return context.hasSameType(m1p.getUnqualifiedType(), 2170 m2p.getUnqualifiedType()); 2171 }; 2172 2173 return !std::equal(m1Type->param_type_begin(), m1Type->param_type_end(), 2174 m2Type->param_type_begin(), compareArgTypes); 2175 } 2176 2177 // If decl is a virtual method, walk the base classes looking for methods that 2178 // decl overrides. This table of overridden methods is used by IRGen to determine 2179 // the vtable layout for decl's parent class. 2180 static void addOverridesForMethod(clang::CXXMethodDecl *decl) { 2181 if (!decl->isVirtual()) 2182 return; 2183 2184 clang::CXXBasePaths paths; 2185 2186 auto find_overridden_methods = 2187 [decl](const clang::CXXBaseSpecifier *specifier, clang::CXXBasePath &path) { 2188 if (auto *base_record = 2189 llvm::dyn_cast<clang::CXXRecordDecl>( 2190 specifier->getType()->getAs<clang::RecordType>()->getDecl())) { 2191 2192 clang::DeclarationName name = decl->getDeclName(); 2193 2194 // If this is a destructor, check whether the base class destructor is 2195 // virtual. 2196 if (name.getNameKind() == clang::DeclarationName::CXXDestructorName) 2197 if (auto *baseDtorDecl = base_record->getDestructor()) { 2198 if (baseDtorDecl->isVirtual()) { 2199 path.Decls = baseDtorDecl; 2200 return true; 2201 } else 2202 return false; 2203 } 2204 2205 // Otherwise, search for name in the base class. 2206 for (path.Decls = base_record->lookup(name); !path.Decls.empty(); 2207 path.Decls = path.Decls.slice(1)) { 2208 if (auto *method_decl = 2209 llvm::dyn_cast<clang::CXXMethodDecl>(path.Decls.front())) 2210 if (method_decl->isVirtual() && !isOverload(decl, method_decl)) { 2211 path.Decls = method_decl; 2212 return true; 2213 } 2214 } 2215 } 2216 2217 return false; 2218 }; 2219 2220 if (decl->getParent()->lookupInBases(find_overridden_methods, paths)) { 2221 for (auto *overridden_decl : paths.found_decls()) 2222 decl->addOverriddenMethod( 2223 llvm::cast<clang::CXXMethodDecl>(overridden_decl)); 2224 } 2225 } 2226 2227 // If clang_type is a CXXRecordDecl, builds the method override list for each 2228 // of its virtual methods. 2229 static void addMethodOverrides(ClangASTContext &ast, CompilerType &clang_type) { 2230 if (auto *record = 2231 ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType())) 2232 for (auto *method : record->methods()) 2233 addOverridesForMethod(method); 2234 } 2235 2236 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2237 lldb_private::Type *type, 2238 CompilerType &clang_type) { 2239 SymbolFileDWARF *dwarf = die.GetDWARF(); 2240 2241 std::lock_guard<std::recursive_mutex> guard( 2242 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2243 2244 // Disable external storage for this type so we don't get anymore 2245 // clang::ExternalASTSource queries for this type. 2246 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2247 2248 if (!die) 2249 return false; 2250 2251 #if defined LLDB_CONFIGURATION_DEBUG 2252 //---------------------------------------------------------------------- 2253 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2254 // environment variable can be set with one or more typenames separated 2255 // by ';' characters. This will cause this function to not complete any 2256 // types whose names match. 2257 // 2258 // Examples of setting this environment variable: 2259 // 2260 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2261 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2262 //---------------------------------------------------------------------- 2263 const char *dont_complete_typenames_cstr = 2264 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2265 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2266 const char *die_name = die.GetName(); 2267 if (die_name && die_name[0]) { 2268 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2269 if (match) { 2270 size_t die_name_length = strlen(die_name); 2271 while (match) { 2272 const char separator_char = ';'; 2273 const char next_char = match[die_name_length]; 2274 if (next_char == '\0' || next_char == separator_char) { 2275 if (match == dont_complete_typenames_cstr || 2276 match[-1] == separator_char) 2277 return false; 2278 } 2279 match = strstr(match + 1, die_name); 2280 } 2281 } 2282 } 2283 } 2284 #endif 2285 2286 const dw_tag_t tag = die.Tag(); 2287 2288 Log *log = 2289 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2290 if (log) 2291 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2292 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2293 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2294 assert(clang_type); 2295 DWARFAttributes attributes; 2296 switch (tag) { 2297 case DW_TAG_structure_type: 2298 case DW_TAG_union_type: 2299 case DW_TAG_class_type: { 2300 ClangASTImporter::LayoutInfo layout_info; 2301 2302 { 2303 if (die.HasChildren()) { 2304 LanguageType class_language = eLanguageTypeUnknown; 2305 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2306 class_language = eLanguageTypeObjC; 2307 // For objective C we don't start the definition when 2308 // the class is created. 2309 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2310 } 2311 2312 int tag_decl_kind = -1; 2313 AccessType default_accessibility = eAccessNone; 2314 if (tag == DW_TAG_structure_type) { 2315 tag_decl_kind = clang::TTK_Struct; 2316 default_accessibility = eAccessPublic; 2317 } else if (tag == DW_TAG_union_type) { 2318 tag_decl_kind = clang::TTK_Union; 2319 default_accessibility = eAccessPublic; 2320 } else if (tag == DW_TAG_class_type) { 2321 tag_decl_kind = clang::TTK_Class; 2322 default_accessibility = eAccessPrivate; 2323 } 2324 2325 SymbolContext sc(die.GetLLDBCompileUnit()); 2326 std::vector<clang::CXXBaseSpecifier *> base_classes; 2327 std::vector<int> member_accessibilities; 2328 bool is_a_class = false; 2329 // Parse members and base classes first 2330 DWARFDIECollection member_function_dies; 2331 2332 DelayedPropertyList delayed_properties; 2333 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2334 member_accessibilities, member_function_dies, 2335 delayed_properties, default_accessibility, is_a_class, 2336 layout_info); 2337 2338 // Now parse any methods if there were any... 2339 size_t num_functions = member_function_dies.Size(); 2340 if (num_functions > 0) { 2341 for (size_t i = 0; i < num_functions; ++i) { 2342 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2343 } 2344 } 2345 2346 if (class_language == eLanguageTypeObjC) { 2347 ConstString class_name(clang_type.GetTypeName()); 2348 if (class_name) { 2349 DIEArray method_die_offsets; 2350 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2351 2352 if (!method_die_offsets.empty()) { 2353 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2354 2355 const size_t num_matches = method_die_offsets.size(); 2356 for (size_t i = 0; i < num_matches; ++i) { 2357 const DIERef &die_ref = method_die_offsets[i]; 2358 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2359 2360 if (method_die) 2361 method_die.ResolveType(); 2362 } 2363 } 2364 2365 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2366 pe = delayed_properties.end(); 2367 pi != pe; ++pi) 2368 pi->Finalize(); 2369 } 2370 } 2371 2372 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2373 // need to tell the clang type it is actually a class. 2374 if (class_language != eLanguageTypeObjC) { 2375 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2376 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2377 clang::TTK_Class); 2378 } 2379 2380 // Since DW_TAG_structure_type gets used for both classes 2381 // and structures, we may need to set any DW_TAG_member 2382 // fields to have a "private" access if none was specified. 2383 // When we parsed the child members we tracked that actual 2384 // accessibility value for each DW_TAG_member in the 2385 // "member_accessibilities" array. If the value for the 2386 // member is zero, then it was set to the "default_accessibility" 2387 // which for structs was "public". Below we correct this 2388 // by setting any fields to "private" that weren't correctly 2389 // set. 2390 if (is_a_class && !member_accessibilities.empty()) { 2391 // This is a class and all members that didn't have 2392 // their access specified are private. 2393 m_ast.SetDefaultAccessForRecordFields( 2394 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2395 &member_accessibilities.front(), member_accessibilities.size()); 2396 } 2397 2398 if (!base_classes.empty()) { 2399 // Make sure all base classes refer to complete types and not 2400 // forward declarations. If we don't do this, clang will crash 2401 // with an assertion in the call to 2402 // clang_type.SetBaseClassesForClassType() 2403 for (auto &base_class : base_classes) { 2404 clang::TypeSourceInfo *type_source_info = 2405 base_class->getTypeSourceInfo(); 2406 if (type_source_info) { 2407 CompilerType base_class_type( 2408 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2409 if (base_class_type.GetCompleteType() == false) { 2410 auto module = dwarf->GetObjectFile()->GetModule(); 2411 module->ReportError(":: Class '%s' has a base class '%s' which " 2412 "does not have a complete definition.", 2413 die.GetName(), 2414 base_class_type.GetTypeName().GetCString()); 2415 if (die.GetCU()->GetProducer() == eProducerClang) 2416 module->ReportError(":: Try compiling the source file with " 2417 "-fstandalone-debug."); 2418 2419 // We have no choice other than to pretend that the base class 2420 // is complete. If we don't do this, clang will crash when we 2421 // call setBases() inside of 2422 // "clang_type.SetBaseClassesForClassType()" 2423 // below. Since we provide layout assistance, all ivars in this 2424 // class and other classes will be fine, this is the best we can 2425 // do 2426 // short of crashing. 2427 if (ClangASTContext::StartTagDeclarationDefinition( 2428 base_class_type)) { 2429 ClangASTContext::CompleteTagDeclarationDefinition( 2430 base_class_type); 2431 } 2432 } 2433 } 2434 } 2435 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2436 &base_classes.front(), 2437 base_classes.size()); 2438 2439 // Clang will copy each CXXBaseSpecifier in "base_classes" 2440 // so we have to free them all. 2441 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2442 base_classes.size()); 2443 } 2444 } 2445 } 2446 2447 addMethodOverrides(m_ast, clang_type); 2448 ClangASTContext::BuildIndirectFields(clang_type); 2449 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2450 2451 if (!layout_info.field_offsets.empty() || 2452 !layout_info.base_offsets.empty() || 2453 !layout_info.vbase_offsets.empty()) { 2454 if (type) 2455 layout_info.bit_size = type->GetByteSize() * 8; 2456 if (layout_info.bit_size == 0) 2457 layout_info.bit_size = 2458 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2459 2460 clang::CXXRecordDecl *record_decl = 2461 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2462 if (record_decl) { 2463 if (log) { 2464 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2465 2466 if (module_sp) { 2467 module_sp->LogMessage( 2468 log, 2469 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2470 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2471 ", alignment = %" PRIu64 2472 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2473 static_cast<void *>(clang_type.GetOpaqueQualType()), 2474 static_cast<void *>(record_decl), layout_info.bit_size, 2475 layout_info.alignment, 2476 static_cast<uint32_t>(layout_info.field_offsets.size()), 2477 static_cast<uint32_t>(layout_info.base_offsets.size()), 2478 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2479 2480 uint32_t idx; 2481 { 2482 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2483 pos, 2484 end = layout_info.field_offsets.end(); 2485 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2486 ++pos, ++idx) { 2487 module_sp->LogMessage( 2488 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2489 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2490 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2491 static_cast<uint32_t>(pos->second), 2492 pos->first->getNameAsString().c_str()); 2493 } 2494 } 2495 2496 { 2497 llvm::DenseMap<const clang::CXXRecordDecl *, 2498 clang::CharUnits>::const_iterator base_pos, 2499 base_end = layout_info.base_offsets.end(); 2500 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2501 base_pos != base_end; ++base_pos, ++idx) { 2502 module_sp->LogMessage( 2503 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2504 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2505 clang_type.GetOpaqueQualType(), idx, 2506 (uint32_t)base_pos->second.getQuantity(), 2507 base_pos->first->getNameAsString().c_str()); 2508 } 2509 } 2510 { 2511 llvm::DenseMap<const clang::CXXRecordDecl *, 2512 clang::CharUnits>::const_iterator vbase_pos, 2513 vbase_end = layout_info.vbase_offsets.end(); 2514 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2515 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2516 module_sp->LogMessage( 2517 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2518 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2519 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2520 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2521 vbase_pos->first->getNameAsString().c_str()); 2522 } 2523 } 2524 } 2525 } 2526 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2527 } 2528 } 2529 } 2530 2531 return (bool)clang_type; 2532 2533 case DW_TAG_enumeration_type: 2534 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2535 if (die.HasChildren()) { 2536 SymbolContext sc(die.GetLLDBCompileUnit()); 2537 bool is_signed = false; 2538 clang_type.IsIntegerType(is_signed); 2539 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2540 die); 2541 } 2542 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2543 } 2544 return (bool)clang_type; 2545 2546 default: 2547 assert(false && "not a forward clang type decl!"); 2548 break; 2549 } 2550 2551 return false; 2552 } 2553 2554 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2555 lldb_private::CompilerDeclContext decl_context) { 2556 std::vector<DWARFDIE> result; 2557 for (auto it = m_decl_ctx_to_die.find( 2558 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2559 it != m_decl_ctx_to_die.end(); it++) 2560 result.push_back(it->second); 2561 return result; 2562 } 2563 2564 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2565 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2566 if (clang_decl != nullptr) 2567 return CompilerDecl(&m_ast, clang_decl); 2568 return CompilerDecl(); 2569 } 2570 2571 CompilerDeclContext 2572 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2573 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2574 if (clang_decl_ctx) 2575 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2576 return CompilerDeclContext(); 2577 } 2578 2579 CompilerDeclContext 2580 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2581 clang::DeclContext *clang_decl_ctx = 2582 GetClangDeclContextContainingDIE(die, nullptr); 2583 if (clang_decl_ctx) 2584 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2585 return CompilerDeclContext(); 2586 } 2587 2588 size_t DWARFASTParserClang::ParseChildEnumerators( 2589 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2590 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2591 if (!parent_die) 2592 return 0; 2593 2594 size_t enumerators_added = 0; 2595 2596 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2597 die = die.GetSibling()) { 2598 const dw_tag_t tag = die.Tag(); 2599 if (tag == DW_TAG_enumerator) { 2600 DWARFAttributes attributes; 2601 const size_t num_child_attributes = die.GetAttributes(attributes); 2602 if (num_child_attributes > 0) { 2603 const char *name = NULL; 2604 bool got_value = false; 2605 int64_t enum_value = 0; 2606 Declaration decl; 2607 2608 uint32_t i; 2609 for (i = 0; i < num_child_attributes; ++i) { 2610 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2611 DWARFFormValue form_value; 2612 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2613 switch (attr) { 2614 case DW_AT_const_value: 2615 got_value = true; 2616 if (is_signed) 2617 enum_value = form_value.Signed(); 2618 else 2619 enum_value = form_value.Unsigned(); 2620 break; 2621 2622 case DW_AT_name: 2623 name = form_value.AsCString(); 2624 break; 2625 2626 case DW_AT_description: 2627 default: 2628 case DW_AT_decl_file: 2629 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2630 form_value.Unsigned())); 2631 break; 2632 case DW_AT_decl_line: 2633 decl.SetLine(form_value.Unsigned()); 2634 break; 2635 case DW_AT_decl_column: 2636 decl.SetColumn(form_value.Unsigned()); 2637 break; 2638 case DW_AT_sibling: 2639 break; 2640 } 2641 } 2642 } 2643 2644 if (name && name[0] && got_value) { 2645 m_ast.AddEnumerationValueToEnumerationType( 2646 clang_type.GetOpaqueQualType(), 2647 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2648 decl, name, enum_value, enumerator_byte_size * 8); 2649 ++enumerators_added; 2650 } 2651 } 2652 } 2653 } 2654 return enumerators_added; 2655 } 2656 2657 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2658 2659 class DIEStack { 2660 public: 2661 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2662 2663 void LogDIEs(Log *log) { 2664 StreamString log_strm; 2665 const size_t n = m_dies.size(); 2666 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2667 for (size_t i = 0; i < n; i++) { 2668 std::string qualified_name; 2669 const DWARFDIE &die = m_dies[i]; 2670 die.GetQualifiedName(qualified_name); 2671 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2672 die.GetOffset(), die.GetTagAsCString(), 2673 qualified_name.c_str()); 2674 } 2675 log->PutCString(log_strm.GetData()); 2676 } 2677 void Pop() { m_dies.pop_back(); } 2678 2679 class ScopedPopper { 2680 public: 2681 ScopedPopper(DIEStack &die_stack) 2682 : m_die_stack(die_stack), m_valid(false) {} 2683 2684 void Push(const DWARFDIE &die) { 2685 m_valid = true; 2686 m_die_stack.Push(die); 2687 } 2688 2689 ~ScopedPopper() { 2690 if (m_valid) 2691 m_die_stack.Pop(); 2692 } 2693 2694 protected: 2695 DIEStack &m_die_stack; 2696 bool m_valid; 2697 }; 2698 2699 protected: 2700 typedef std::vector<DWARFDIE> Stack; 2701 Stack m_dies; 2702 }; 2703 #endif 2704 2705 Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2706 const DWARFDIE &die) { 2707 DWARFRangeList func_ranges; 2708 const char *name = NULL; 2709 const char *mangled = NULL; 2710 int decl_file = 0; 2711 int decl_line = 0; 2712 int decl_column = 0; 2713 int call_file = 0; 2714 int call_line = 0; 2715 int call_column = 0; 2716 DWARFExpression frame_base(die.GetCU()); 2717 2718 const dw_tag_t tag = die.Tag(); 2719 2720 if (tag != DW_TAG_subprogram) 2721 return NULL; 2722 2723 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2724 decl_column, call_file, call_line, call_column, 2725 &frame_base)) { 2726 2727 // Union of all ranges in the function DIE (if the function is 2728 // discontiguous) 2729 AddressRange func_range; 2730 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2731 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2732 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2733 lowest_func_addr <= highest_func_addr) { 2734 ModuleSP module_sp(die.GetModule()); 2735 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2736 lowest_func_addr, module_sp->GetSectionList()); 2737 if (func_range.GetBaseAddress().IsValid()) 2738 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2739 } 2740 2741 if (func_range.GetBaseAddress().IsValid()) { 2742 Mangled func_name; 2743 if (mangled) 2744 func_name.SetValue(ConstString(mangled), true); 2745 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2746 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2747 strcmp(name, "main") != 0) { 2748 // If the mangled name is not present in the DWARF, generate the 2749 // demangled name 2750 // using the decl context. We skip if the function is "main" as its name 2751 // is 2752 // never mangled. 2753 bool is_static = false; 2754 bool is_variadic = false; 2755 bool has_template_params = false; 2756 unsigned type_quals = 0; 2757 std::vector<CompilerType> param_types; 2758 std::vector<clang::ParmVarDecl *> param_decls; 2759 DWARFDeclContext decl_ctx; 2760 StreamString sstr; 2761 2762 die.GetDWARFDeclContext(decl_ctx); 2763 sstr << decl_ctx.GetQualifiedName(); 2764 2765 clang::DeclContext *containing_decl_ctx = 2766 GetClangDeclContextContainingDIE(die, nullptr); 2767 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2768 is_variadic, has_template_params, param_types, 2769 param_decls, type_quals); 2770 sstr << "("; 2771 for (size_t i = 0; i < param_types.size(); i++) { 2772 if (i > 0) 2773 sstr << ", "; 2774 sstr << param_types[i].GetTypeName(); 2775 } 2776 if (is_variadic) 2777 sstr << ", ..."; 2778 sstr << ")"; 2779 if (type_quals & clang::Qualifiers::Const) 2780 sstr << " const"; 2781 2782 func_name.SetValue(ConstString(sstr.GetString()), false); 2783 } else 2784 func_name.SetValue(ConstString(name), false); 2785 2786 FunctionSP func_sp; 2787 std::unique_ptr<Declaration> decl_ap; 2788 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2789 decl_ap.reset(new Declaration( 2790 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2791 decl_line, decl_column)); 2792 2793 SymbolFileDWARF *dwarf = die.GetDWARF(); 2794 // Supply the type _only_ if it has already been parsed 2795 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2796 2797 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2798 2799 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2800 const user_id_t func_user_id = die.GetID(); 2801 func_sp.reset(new Function(sc.comp_unit, 2802 func_user_id, // UserID is the DIE offset 2803 func_user_id, func_name, func_type, 2804 func_range)); // first address range 2805 2806 if (func_sp.get() != NULL) { 2807 if (frame_base.IsValid()) 2808 func_sp->GetFrameBaseExpression() = frame_base; 2809 sc.comp_unit->AddFunction(func_sp); 2810 return func_sp.get(); 2811 } 2812 } 2813 } 2814 } 2815 return NULL; 2816 } 2817 2818 bool DWARFASTParserClang::ParseChildMembers( 2819 const SymbolContext &sc, const DWARFDIE &parent_die, 2820 CompilerType &class_clang_type, const LanguageType class_language, 2821 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2822 std::vector<int> &member_accessibilities, 2823 DWARFDIECollection &member_function_dies, 2824 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2825 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2826 if (!parent_die) 2827 return 0; 2828 2829 // Get the parent byte size so we can verify any members will fit 2830 const uint64_t parent_byte_size = 2831 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2832 const uint64_t parent_bit_size = 2833 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2834 2835 uint32_t member_idx = 0; 2836 BitfieldInfo last_field_info; 2837 2838 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2839 ClangASTContext *ast = 2840 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2841 if (ast == nullptr) 2842 return 0; 2843 2844 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2845 die = die.GetSibling()) { 2846 dw_tag_t tag = die.Tag(); 2847 2848 switch (tag) { 2849 case DW_TAG_member: 2850 case DW_TAG_APPLE_property: { 2851 DWARFAttributes attributes; 2852 const size_t num_attributes = die.GetAttributes(attributes); 2853 if (num_attributes > 0) { 2854 Declaration decl; 2855 // DWARFExpression location; 2856 const char *name = NULL; 2857 const char *prop_name = NULL; 2858 const char *prop_getter_name = NULL; 2859 const char *prop_setter_name = NULL; 2860 uint32_t prop_attributes = 0; 2861 2862 bool is_artificial = false; 2863 DWARFFormValue encoding_form; 2864 AccessType accessibility = eAccessNone; 2865 uint32_t member_byte_offset = 2866 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2867 size_t byte_size = 0; 2868 int64_t bit_offset = 0; 2869 uint64_t data_bit_offset = UINT64_MAX; 2870 size_t bit_size = 0; 2871 bool is_external = 2872 false; // On DW_TAG_members, this means the member is static 2873 uint32_t i; 2874 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2875 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2876 DWARFFormValue form_value; 2877 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2878 switch (attr) { 2879 case DW_AT_decl_file: 2880 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2881 form_value.Unsigned())); 2882 break; 2883 case DW_AT_decl_line: 2884 decl.SetLine(form_value.Unsigned()); 2885 break; 2886 case DW_AT_decl_column: 2887 decl.SetColumn(form_value.Unsigned()); 2888 break; 2889 case DW_AT_name: 2890 name = form_value.AsCString(); 2891 break; 2892 case DW_AT_type: 2893 encoding_form = form_value; 2894 break; 2895 case DW_AT_bit_offset: 2896 bit_offset = form_value.Signed(); 2897 break; 2898 case DW_AT_bit_size: 2899 bit_size = form_value.Unsigned(); 2900 break; 2901 case DW_AT_byte_size: 2902 byte_size = form_value.Unsigned(); 2903 break; 2904 case DW_AT_data_bit_offset: 2905 data_bit_offset = form_value.Unsigned(); 2906 break; 2907 case DW_AT_data_member_location: 2908 if (form_value.BlockData()) { 2909 Value initialValue(0); 2910 Value memberOffset(0); 2911 const DWARFDataExtractor &debug_info_data = 2912 die.GetDWARF()->get_debug_info_data(); 2913 uint32_t block_length = form_value.Unsigned(); 2914 uint32_t block_offset = 2915 form_value.BlockData() - debug_info_data.GetDataStart(); 2916 if (DWARFExpression::Evaluate( 2917 nullptr, // ExecutionContext * 2918 nullptr, // RegisterContext * 2919 module_sp, debug_info_data, die.GetCU(), block_offset, 2920 block_length, eRegisterKindDWARF, &initialValue, 2921 nullptr, memberOffset, nullptr)) { 2922 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2923 } 2924 } else { 2925 // With DWARF 3 and later, if the value is an integer constant, 2926 // this form value is the offset in bytes from the beginning 2927 // of the containing entity. 2928 member_byte_offset = form_value.Unsigned(); 2929 } 2930 break; 2931 2932 case DW_AT_accessibility: 2933 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2934 break; 2935 case DW_AT_artificial: 2936 is_artificial = form_value.Boolean(); 2937 break; 2938 case DW_AT_APPLE_property_name: 2939 prop_name = form_value.AsCString(); 2940 break; 2941 case DW_AT_APPLE_property_getter: 2942 prop_getter_name = form_value.AsCString(); 2943 break; 2944 case DW_AT_APPLE_property_setter: 2945 prop_setter_name = form_value.AsCString(); 2946 break; 2947 case DW_AT_APPLE_property_attribute: 2948 prop_attributes = form_value.Unsigned(); 2949 break; 2950 case DW_AT_external: 2951 is_external = form_value.Boolean(); 2952 break; 2953 2954 default: 2955 case DW_AT_declaration: 2956 case DW_AT_description: 2957 case DW_AT_mutable: 2958 case DW_AT_visibility: 2959 case DW_AT_sibling: 2960 break; 2961 } 2962 } 2963 } 2964 2965 if (prop_name) { 2966 ConstString fixed_getter; 2967 ConstString fixed_setter; 2968 2969 // Check if the property getter/setter were provided as full 2970 // names. We want basenames, so we extract them. 2971 2972 if (prop_getter_name && prop_getter_name[0] == '-') { 2973 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2974 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2975 } 2976 2977 if (prop_setter_name && prop_setter_name[0] == '-') { 2978 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2979 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2980 } 2981 2982 // If the names haven't been provided, they need to be 2983 // filled in. 2984 2985 if (!prop_getter_name) { 2986 prop_getter_name = prop_name; 2987 } 2988 if (!prop_setter_name && prop_name[0] && 2989 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2990 StreamString ss; 2991 2992 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2993 2994 fixed_setter.SetString(ss.GetString()); 2995 prop_setter_name = fixed_setter.GetCString(); 2996 } 2997 } 2998 2999 // Clang has a DWARF generation bug where sometimes it 3000 // represents fields that are references with bad byte size 3001 // and bit size/offset information such as: 3002 // 3003 // DW_AT_byte_size( 0x00 ) 3004 // DW_AT_bit_size( 0x40 ) 3005 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 3006 // 3007 // So check the bit offset to make sure it is sane, and if 3008 // the values are not sane, remove them. If we don't do this 3009 // then we will end up with a crash if we try to use this 3010 // type in an expression when clang becomes unhappy with its 3011 // recycled debug info. 3012 3013 if (byte_size == 0 && bit_offset < 0) { 3014 bit_size = 0; 3015 bit_offset = 0; 3016 } 3017 3018 // FIXME: Make Clang ignore Objective-C accessibility for expressions 3019 if (class_language == eLanguageTypeObjC || 3020 class_language == eLanguageTypeObjC_plus_plus) 3021 accessibility = eAccessNone; 3022 3023 if (member_idx == 0 && !is_artificial && name && 3024 (strstr(name, "_vptr$") == name)) { 3025 // Not all compilers will mark the vtable pointer 3026 // member as artificial (llvm-gcc). We can't have 3027 // the virtual members in our classes otherwise it 3028 // throws off all child offsets since we end up 3029 // having and extra pointer sized member in our 3030 // class layouts. 3031 is_artificial = true; 3032 } 3033 3034 // Handle static members 3035 if (is_external && member_byte_offset == UINT32_MAX) { 3036 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 3037 3038 if (var_type) { 3039 if (accessibility == eAccessNone) 3040 accessibility = eAccessPublic; 3041 ClangASTContext::AddVariableToRecordType( 3042 class_clang_type, name, var_type->GetLayoutCompilerType(), 3043 accessibility); 3044 } 3045 break; 3046 } 3047 3048 if (is_artificial == false) { 3049 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 3050 3051 clang::FieldDecl *field_decl = NULL; 3052 if (tag == DW_TAG_member) { 3053 if (member_type) { 3054 if (accessibility == eAccessNone) 3055 accessibility = default_accessibility; 3056 member_accessibilities.push_back(accessibility); 3057 3058 uint64_t field_bit_offset = 3059 (member_byte_offset == UINT32_MAX ? 0 3060 : (member_byte_offset * 8)); 3061 if (bit_size > 0) { 3062 3063 BitfieldInfo this_field_info; 3064 this_field_info.bit_offset = field_bit_offset; 3065 this_field_info.bit_size = bit_size; 3066 3067 ///////////////////////////////////////////////////////////// 3068 // How to locate a field given the DWARF debug information 3069 // 3070 // AT_byte_size indicates the size of the word in which the 3071 // bit offset must be interpreted. 3072 // 3073 // AT_data_member_location indicates the byte offset of the 3074 // word from the base address of the structure. 3075 // 3076 // AT_bit_offset indicates how many bits into the word 3077 // (according to the host endianness) the low-order bit of 3078 // the field starts. AT_bit_offset can be negative. 3079 // 3080 // AT_bit_size indicates the size of the field in bits. 3081 ///////////////////////////////////////////////////////////// 3082 3083 if (data_bit_offset != UINT64_MAX) { 3084 this_field_info.bit_offset = data_bit_offset; 3085 } else { 3086 if (byte_size == 0) 3087 byte_size = member_type->GetByteSize(); 3088 3089 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3090 if (objfile->GetByteOrder() == eByteOrderLittle) { 3091 this_field_info.bit_offset += byte_size * 8; 3092 this_field_info.bit_offset -= (bit_offset + bit_size); 3093 } else { 3094 this_field_info.bit_offset += bit_offset; 3095 } 3096 } 3097 3098 if ((this_field_info.bit_offset >= parent_bit_size) || 3099 !last_field_info.NextBitfieldOffsetIsValid( 3100 this_field_info.bit_offset)) { 3101 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3102 objfile->GetModule()->ReportWarning( 3103 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 3104 "bit offset (0x%8.8" PRIx64 3105 ") member will be ignored. Please file a bug against the " 3106 "compiler and include the preprocessed output for %s\n", 3107 die.GetID(), DW_TAG_value_to_name(tag), name, 3108 this_field_info.bit_offset, 3109 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3110 : "the source file"); 3111 this_field_info.Clear(); 3112 continue; 3113 } 3114 3115 // Update the field bit offset we will report for layout 3116 field_bit_offset = this_field_info.bit_offset; 3117 3118 // If the member to be emitted did not start on a character 3119 // boundary and there is 3120 // empty space between the last field and this one, then we need 3121 // to emit an 3122 // anonymous member filling up the space up to its start. There 3123 // are three cases 3124 // here: 3125 // 3126 // 1 If the previous member ended on a character boundary, then 3127 // we can emit an 3128 // anonymous member starting at the most recent character 3129 // boundary. 3130 // 3131 // 2 If the previous member did not end on a character boundary 3132 // and the distance 3133 // from the end of the previous member to the current member 3134 // is less than a 3135 // word width, then we can emit an anonymous member starting 3136 // right after the 3137 // previous member and right before this member. 3138 // 3139 // 3 If the previous member did not end on a character boundary 3140 // and the distance 3141 // from the end of the previous member to the current member 3142 // is greater than 3143 // or equal a word width, then we act as in Case 1. 3144 3145 const uint64_t character_width = 8; 3146 const uint64_t word_width = 32; 3147 3148 // Objective-C has invalid DW_AT_bit_offset values in older 3149 // versions 3150 // of clang, so we have to be careful and only insert unnamed 3151 // bitfields 3152 // if we have a new enough clang. 3153 bool detect_unnamed_bitfields = true; 3154 3155 if (class_language == eLanguageTypeObjC || 3156 class_language == eLanguageTypeObjC_plus_plus) 3157 detect_unnamed_bitfields = 3158 die.GetCU()->Supports_unnamed_objc_bitfields(); 3159 3160 if (detect_unnamed_bitfields) { 3161 BitfieldInfo anon_field_info; 3162 3163 if ((this_field_info.bit_offset % character_width) != 3164 0) // not char aligned 3165 { 3166 uint64_t last_field_end = 0; 3167 3168 if (last_field_info.IsValid()) 3169 last_field_end = 3170 last_field_info.bit_offset + last_field_info.bit_size; 3171 3172 if (this_field_info.bit_offset != last_field_end) { 3173 if (((last_field_end % character_width) == 0) || // case 1 3174 (this_field_info.bit_offset - last_field_end >= 3175 word_width)) // case 3 3176 { 3177 anon_field_info.bit_size = 3178 this_field_info.bit_offset % character_width; 3179 anon_field_info.bit_offset = 3180 this_field_info.bit_offset - 3181 anon_field_info.bit_size; 3182 } else // case 2 3183 { 3184 anon_field_info.bit_size = 3185 this_field_info.bit_offset - last_field_end; 3186 anon_field_info.bit_offset = last_field_end; 3187 } 3188 } 3189 } 3190 3191 if (anon_field_info.IsValid()) { 3192 clang::FieldDecl *unnamed_bitfield_decl = 3193 ClangASTContext::AddFieldToRecordType( 3194 class_clang_type, NULL, 3195 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3196 eEncodingSint, word_width), 3197 accessibility, anon_field_info.bit_size); 3198 3199 layout_info.field_offsets.insert(std::make_pair( 3200 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3201 } 3202 } 3203 last_field_info = this_field_info; 3204 } else { 3205 last_field_info.Clear(); 3206 } 3207 3208 CompilerType member_clang_type = 3209 member_type->GetLayoutCompilerType(); 3210 if (!member_clang_type.IsCompleteType()) 3211 member_clang_type.GetCompleteType(); 3212 3213 { 3214 // Older versions of clang emit array[0] and array[1] in the 3215 // same way (<rdar://problem/12566646>). 3216 // If the current field is at the end of the structure, then 3217 // there is definitely no room for extra 3218 // elements and we override the type to array[0]. 3219 3220 CompilerType member_array_element_type; 3221 uint64_t member_array_size; 3222 bool member_array_is_incomplete; 3223 3224 if (member_clang_type.IsArrayType( 3225 &member_array_element_type, &member_array_size, 3226 &member_array_is_incomplete) && 3227 !member_array_is_incomplete) { 3228 uint64_t parent_byte_size = 3229 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3230 UINT64_MAX); 3231 3232 if (member_byte_offset >= parent_byte_size) { 3233 if (member_array_size != 1 && 3234 (member_array_size != 0 || 3235 member_byte_offset > parent_byte_size)) { 3236 module_sp->ReportError( 3237 "0x%8.8" PRIx64 3238 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3239 " which extends beyond the bounds of 0x%8.8" PRIx64, 3240 die.GetID(), name, encoding_form.Reference(), 3241 parent_die.GetID()); 3242 } 3243 3244 member_clang_type = m_ast.CreateArrayType( 3245 member_array_element_type, 0, false); 3246 } 3247 } 3248 } 3249 3250 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3251 member_clang_type.GetCompleteType() == false) { 3252 if (die.GetCU()->GetProducer() == eProducerClang) 3253 module_sp->ReportError( 3254 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3255 "0x%8.8x (%s) whose type is a forward declaration, not a " 3256 "complete definition.\nTry compiling the source file " 3257 "with -fstandalone-debug", 3258 parent_die.GetOffset(), parent_die.GetName(), 3259 die.GetOffset(), name); 3260 else 3261 module_sp->ReportError( 3262 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3263 "0x%8.8x (%s) whose type is a forward declaration, not a " 3264 "complete definition.\nPlease file a bug against the " 3265 "compiler and include the preprocessed output for %s", 3266 parent_die.GetOffset(), parent_die.GetName(), 3267 die.GetOffset(), name, 3268 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3269 : "the source file"); 3270 // We have no choice other than to pretend that the member class 3271 // is complete. If we don't do this, clang will crash when 3272 // trying 3273 // to layout the class. Since we provide layout assistance, all 3274 // ivars in this class and other classes will be fine, this is 3275 // the best we can do short of crashing. 3276 if (ClangASTContext::StartTagDeclarationDefinition( 3277 member_clang_type)) { 3278 ClangASTContext::CompleteTagDeclarationDefinition( 3279 member_clang_type); 3280 } else { 3281 module_sp->ReportError( 3282 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3283 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3284 "were not able to start its definition.\nPlease file a " 3285 "bug and attach the file at the start of this error " 3286 "message", 3287 parent_die.GetOffset(), parent_die.GetName(), 3288 die.GetOffset(), name); 3289 } 3290 } 3291 3292 field_decl = ClangASTContext::AddFieldToRecordType( 3293 class_clang_type, name, member_clang_type, accessibility, 3294 bit_size); 3295 3296 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3297 3298 layout_info.field_offsets.insert( 3299 std::make_pair(field_decl, field_bit_offset)); 3300 } else { 3301 if (name) 3302 module_sp->ReportError( 3303 "0x%8.8" PRIx64 3304 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3305 " which was unable to be parsed", 3306 die.GetID(), name, encoding_form.Reference()); 3307 else 3308 module_sp->ReportError( 3309 "0x%8.8" PRIx64 3310 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3311 " which was unable to be parsed", 3312 die.GetID(), encoding_form.Reference()); 3313 } 3314 } 3315 3316 if (prop_name != NULL && member_type) { 3317 clang::ObjCIvarDecl *ivar_decl = NULL; 3318 3319 if (field_decl) { 3320 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3321 assert(ivar_decl != NULL); 3322 } 3323 3324 ClangASTMetadata metadata; 3325 metadata.SetUserID(die.GetID()); 3326 delayed_properties.push_back(DelayedAddObjCClassProperty( 3327 class_clang_type, prop_name, 3328 member_type->GetLayoutCompilerType(), ivar_decl, 3329 prop_setter_name, prop_getter_name, prop_attributes, 3330 &metadata)); 3331 3332 if (ivar_decl) 3333 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3334 } 3335 } 3336 } 3337 ++member_idx; 3338 } break; 3339 3340 case DW_TAG_subprogram: 3341 // Let the type parsing code handle this one for us. 3342 member_function_dies.Append(die); 3343 break; 3344 3345 case DW_TAG_inheritance: { 3346 is_a_class = true; 3347 if (default_accessibility == eAccessNone) 3348 default_accessibility = eAccessPrivate; 3349 // TODO: implement DW_TAG_inheritance type parsing 3350 DWARFAttributes attributes; 3351 const size_t num_attributes = die.GetAttributes(attributes); 3352 if (num_attributes > 0) { 3353 Declaration decl; 3354 DWARFExpression location(die.GetCU()); 3355 DWARFFormValue encoding_form; 3356 AccessType accessibility = default_accessibility; 3357 bool is_virtual = false; 3358 bool is_base_of_class = true; 3359 off_t member_byte_offset = 0; 3360 uint32_t i; 3361 for (i = 0; i < num_attributes; ++i) { 3362 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3363 DWARFFormValue form_value; 3364 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3365 switch (attr) { 3366 case DW_AT_decl_file: 3367 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3368 form_value.Unsigned())); 3369 break; 3370 case DW_AT_decl_line: 3371 decl.SetLine(form_value.Unsigned()); 3372 break; 3373 case DW_AT_decl_column: 3374 decl.SetColumn(form_value.Unsigned()); 3375 break; 3376 case DW_AT_type: 3377 encoding_form = form_value; 3378 break; 3379 case DW_AT_data_member_location: 3380 if (form_value.BlockData()) { 3381 Value initialValue(0); 3382 Value memberOffset(0); 3383 const DWARFDataExtractor &debug_info_data = 3384 die.GetDWARF()->get_debug_info_data(); 3385 uint32_t block_length = form_value.Unsigned(); 3386 uint32_t block_offset = 3387 form_value.BlockData() - debug_info_data.GetDataStart(); 3388 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3389 debug_info_data, die.GetCU(), 3390 block_offset, block_length, 3391 eRegisterKindDWARF, &initialValue, 3392 nullptr, memberOffset, nullptr)) { 3393 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3394 } 3395 } else { 3396 // With DWARF 3 and later, if the value is an integer constant, 3397 // this form value is the offset in bytes from the beginning 3398 // of the containing entity. 3399 member_byte_offset = form_value.Unsigned(); 3400 } 3401 break; 3402 3403 case DW_AT_accessibility: 3404 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3405 break; 3406 3407 case DW_AT_virtuality: 3408 is_virtual = form_value.Boolean(); 3409 break; 3410 3411 case DW_AT_sibling: 3412 break; 3413 3414 default: 3415 break; 3416 } 3417 } 3418 } 3419 3420 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3421 if (base_class_type == NULL) { 3422 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3423 "resolve the base class at 0x%8.8" PRIx64 3424 " from enclosing type 0x%8.8x. \nPlease file " 3425 "a bug and attach the file at the start of " 3426 "this error message", 3427 die.GetOffset(), encoding_form.Reference(), 3428 parent_die.GetOffset()); 3429 break; 3430 } 3431 3432 CompilerType base_class_clang_type = 3433 base_class_type->GetFullCompilerType(); 3434 assert(base_class_clang_type); 3435 if (class_language == eLanguageTypeObjC) { 3436 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3437 } else { 3438 base_classes.push_back(ast->CreateBaseClassSpecifier( 3439 base_class_clang_type.GetOpaqueQualType(), accessibility, 3440 is_virtual, is_base_of_class)); 3441 3442 if (is_virtual) { 3443 // Do not specify any offset for virtual inheritance. The DWARF 3444 // produced by clang doesn't 3445 // give us a constant offset, but gives us a DWARF expressions that 3446 // requires an actual object 3447 // in memory. the DW_AT_data_member_location for a virtual base 3448 // class looks like: 3449 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3450 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3451 // DW_OP_plus ) 3452 // Given this, there is really no valid response we can give to 3453 // clang for virtual base 3454 // class offsets, and this should eventually be removed from 3455 // LayoutRecordType() in the external 3456 // AST source in clang. 3457 } else { 3458 layout_info.base_offsets.insert(std::make_pair( 3459 ast->GetAsCXXRecordDecl( 3460 base_class_clang_type.GetOpaqueQualType()), 3461 clang::CharUnits::fromQuantity(member_byte_offset))); 3462 } 3463 } 3464 } 3465 } break; 3466 3467 default: 3468 break; 3469 } 3470 } 3471 3472 return true; 3473 } 3474 3475 size_t DWARFASTParserClang::ParseChildParameters( 3476 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3477 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3478 bool &is_variadic, bool &has_template_params, 3479 std::vector<CompilerType> &function_param_types, 3480 std::vector<clang::ParmVarDecl *> &function_param_decls, 3481 unsigned &type_quals) { 3482 if (!parent_die) 3483 return 0; 3484 3485 size_t arg_idx = 0; 3486 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3487 die = die.GetSibling()) { 3488 const dw_tag_t tag = die.Tag(); 3489 switch (tag) { 3490 case DW_TAG_formal_parameter: { 3491 DWARFAttributes attributes; 3492 const size_t num_attributes = die.GetAttributes(attributes); 3493 if (num_attributes > 0) { 3494 const char *name = NULL; 3495 Declaration decl; 3496 DWARFFormValue param_type_die_form; 3497 bool is_artificial = false; 3498 // one of None, Auto, Register, Extern, Static, PrivateExtern 3499 3500 clang::StorageClass storage = clang::SC_None; 3501 uint32_t i; 3502 for (i = 0; i < num_attributes; ++i) { 3503 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3504 DWARFFormValue form_value; 3505 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3506 switch (attr) { 3507 case DW_AT_decl_file: 3508 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3509 form_value.Unsigned())); 3510 break; 3511 case DW_AT_decl_line: 3512 decl.SetLine(form_value.Unsigned()); 3513 break; 3514 case DW_AT_decl_column: 3515 decl.SetColumn(form_value.Unsigned()); 3516 break; 3517 case DW_AT_name: 3518 name = form_value.AsCString(); 3519 break; 3520 case DW_AT_type: 3521 param_type_die_form = form_value; 3522 break; 3523 case DW_AT_artificial: 3524 is_artificial = form_value.Boolean(); 3525 break; 3526 case DW_AT_location: 3527 case DW_AT_const_value: 3528 case DW_AT_default_value: 3529 case DW_AT_description: 3530 case DW_AT_endianity: 3531 case DW_AT_is_optional: 3532 case DW_AT_segment: 3533 case DW_AT_variable_parameter: 3534 default: 3535 case DW_AT_abstract_origin: 3536 case DW_AT_sibling: 3537 break; 3538 } 3539 } 3540 } 3541 3542 bool skip = false; 3543 if (skip_artificial) { 3544 if (is_artificial) { 3545 // In order to determine if a C++ member function is 3546 // "const" we have to look at the const-ness of "this"... 3547 // Ugly, but that 3548 if (arg_idx == 0) { 3549 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3550 // Often times compilers omit the "this" name for the 3551 // specification DIEs, so we can't rely upon the name 3552 // being in the formal parameter DIE... 3553 if (name == NULL || ::strcmp(name, "this") == 0) { 3554 Type *this_type = 3555 die.ResolveTypeUID(DIERef(param_type_die_form)); 3556 if (this_type) { 3557 uint32_t encoding_mask = this_type->GetEncodingMask(); 3558 if (encoding_mask & Type::eEncodingIsPointerUID) { 3559 is_static = false; 3560 3561 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3562 type_quals |= clang::Qualifiers::Const; 3563 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3564 type_quals |= clang::Qualifiers::Volatile; 3565 } 3566 } 3567 } 3568 } 3569 } 3570 skip = true; 3571 } else { 3572 3573 // HACK: Objective C formal parameters "self" and "_cmd" 3574 // are not marked as artificial in the DWARF... 3575 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3576 if (comp_unit) { 3577 switch (comp_unit->GetLanguage()) { 3578 case eLanguageTypeObjC: 3579 case eLanguageTypeObjC_plus_plus: 3580 if (name && name[0] && 3581 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3582 skip = true; 3583 break; 3584 default: 3585 break; 3586 } 3587 } 3588 } 3589 } 3590 3591 if (!skip) { 3592 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3593 if (type) { 3594 function_param_types.push_back(type->GetForwardCompilerType()); 3595 3596 clang::ParmVarDecl *param_var_decl = 3597 m_ast.CreateParameterDeclaration( 3598 name, type->GetForwardCompilerType(), storage); 3599 assert(param_var_decl); 3600 function_param_decls.push_back(param_var_decl); 3601 3602 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3603 } 3604 } 3605 } 3606 arg_idx++; 3607 } break; 3608 3609 case DW_TAG_unspecified_parameters: 3610 is_variadic = true; 3611 break; 3612 3613 case DW_TAG_template_type_parameter: 3614 case DW_TAG_template_value_parameter: 3615 case DW_TAG_GNU_template_parameter_pack: 3616 // The one caller of this was never using the template_param_infos, 3617 // and the local variable was taking up a large amount of stack space 3618 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3619 // the template params back, we can add them back. 3620 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3621 has_template_params = true; 3622 break; 3623 3624 default: 3625 break; 3626 } 3627 } 3628 return arg_idx; 3629 } 3630 3631 void DWARFASTParserClang::ParseChildArrayInfo( 3632 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3633 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3634 uint32_t &bit_stride) { 3635 if (!parent_die) 3636 return; 3637 3638 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3639 die = die.GetSibling()) { 3640 const dw_tag_t tag = die.Tag(); 3641 switch (tag) { 3642 case DW_TAG_subrange_type: { 3643 DWARFAttributes attributes; 3644 const size_t num_child_attributes = die.GetAttributes(attributes); 3645 if (num_child_attributes > 0) { 3646 uint64_t num_elements = 0; 3647 uint64_t lower_bound = 0; 3648 uint64_t upper_bound = 0; 3649 bool upper_bound_valid = false; 3650 uint32_t i; 3651 for (i = 0; i < num_child_attributes; ++i) { 3652 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3653 DWARFFormValue form_value; 3654 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3655 switch (attr) { 3656 case DW_AT_name: 3657 break; 3658 3659 case DW_AT_count: 3660 num_elements = form_value.Unsigned(); 3661 break; 3662 3663 case DW_AT_bit_stride: 3664 bit_stride = form_value.Unsigned(); 3665 break; 3666 3667 case DW_AT_byte_stride: 3668 byte_stride = form_value.Unsigned(); 3669 break; 3670 3671 case DW_AT_lower_bound: 3672 lower_bound = form_value.Unsigned(); 3673 break; 3674 3675 case DW_AT_upper_bound: 3676 upper_bound_valid = true; 3677 upper_bound = form_value.Unsigned(); 3678 break; 3679 3680 default: 3681 case DW_AT_abstract_origin: 3682 case DW_AT_accessibility: 3683 case DW_AT_allocated: 3684 case DW_AT_associated: 3685 case DW_AT_data_location: 3686 case DW_AT_declaration: 3687 case DW_AT_description: 3688 case DW_AT_sibling: 3689 case DW_AT_threads_scaled: 3690 case DW_AT_type: 3691 case DW_AT_visibility: 3692 break; 3693 } 3694 } 3695 } 3696 3697 if (num_elements == 0) { 3698 if (upper_bound_valid && upper_bound >= lower_bound) 3699 num_elements = upper_bound - lower_bound + 1; 3700 } 3701 3702 element_orders.push_back(num_elements); 3703 } 3704 } break; 3705 } 3706 } 3707 } 3708 3709 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3710 if (die) { 3711 SymbolFileDWARF *dwarf = die.GetDWARF(); 3712 DWARFAttributes attributes; 3713 const size_t num_attributes = die.GetAttributes(attributes); 3714 if (num_attributes > 0) { 3715 DWARFFormValue type_die_form; 3716 for (size_t i = 0; i < num_attributes; ++i) { 3717 dw_attr_t attr = attributes.AttributeAtIndex(i); 3718 DWARFFormValue form_value; 3719 3720 if (attr == DW_AT_type && 3721 attributes.ExtractFormValueAtIndex(i, form_value)) 3722 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3723 } 3724 } 3725 } 3726 3727 return nullptr; 3728 } 3729 3730 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3731 if (!die) 3732 return nullptr; 3733 3734 switch (die.Tag()) { 3735 case DW_TAG_variable: 3736 case DW_TAG_constant: 3737 case DW_TAG_formal_parameter: 3738 case DW_TAG_imported_declaration: 3739 case DW_TAG_imported_module: 3740 break; 3741 default: 3742 return nullptr; 3743 } 3744 3745 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3746 if (cache_pos != m_die_to_decl.end()) 3747 return cache_pos->second; 3748 3749 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3750 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3751 m_die_to_decl[die.GetDIE()] = decl; 3752 m_decl_to_die[decl].insert(die.GetDIE()); 3753 return decl; 3754 } 3755 3756 if (DWARFDIE abstract_origin_die = 3757 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3758 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3759 m_die_to_decl[die.GetDIE()] = decl; 3760 m_decl_to_die[decl].insert(die.GetDIE()); 3761 return decl; 3762 } 3763 3764 clang::Decl *decl = nullptr; 3765 switch (die.Tag()) { 3766 case DW_TAG_variable: 3767 case DW_TAG_constant: 3768 case DW_TAG_formal_parameter: { 3769 SymbolFileDWARF *dwarf = die.GetDWARF(); 3770 Type *type = GetTypeForDIE(die); 3771 if (dwarf && type) { 3772 const char *name = die.GetName(); 3773 clang::DeclContext *decl_context = 3774 ClangASTContext::DeclContextGetAsDeclContext( 3775 dwarf->GetDeclContextContainingUID(die.GetID())); 3776 decl = m_ast.CreateVariableDeclaration( 3777 decl_context, name, 3778 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3779 } 3780 break; 3781 } 3782 case DW_TAG_imported_declaration: { 3783 SymbolFileDWARF *dwarf = die.GetDWARF(); 3784 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3785 if (imported_uid) { 3786 CompilerDecl imported_decl = imported_uid.GetDecl(); 3787 if (imported_decl) { 3788 clang::DeclContext *decl_context = 3789 ClangASTContext::DeclContextGetAsDeclContext( 3790 dwarf->GetDeclContextContainingUID(die.GetID())); 3791 if (clang::NamedDecl *clang_imported_decl = 3792 llvm::dyn_cast<clang::NamedDecl>( 3793 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3794 decl = 3795 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3796 } 3797 } 3798 break; 3799 } 3800 case DW_TAG_imported_module: { 3801 SymbolFileDWARF *dwarf = die.GetDWARF(); 3802 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3803 3804 if (imported_uid) { 3805 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3806 if (imported_decl_ctx) { 3807 clang::DeclContext *decl_context = 3808 ClangASTContext::DeclContextGetAsDeclContext( 3809 dwarf->GetDeclContextContainingUID(die.GetID())); 3810 if (clang::NamespaceDecl *ns_decl = 3811 ClangASTContext::DeclContextGetAsNamespaceDecl( 3812 imported_decl_ctx)) 3813 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3814 } 3815 } 3816 break; 3817 } 3818 default: 3819 break; 3820 } 3821 3822 m_die_to_decl[die.GetDIE()] = decl; 3823 m_decl_to_die[decl].insert(die.GetDIE()); 3824 3825 return decl; 3826 } 3827 3828 clang::DeclContext * 3829 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3830 if (die) { 3831 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3832 if (decl_ctx) 3833 return decl_ctx; 3834 3835 bool try_parsing_type = true; 3836 switch (die.Tag()) { 3837 case DW_TAG_compile_unit: 3838 decl_ctx = m_ast.GetTranslationUnitDecl(); 3839 try_parsing_type = false; 3840 break; 3841 3842 case DW_TAG_namespace: 3843 decl_ctx = ResolveNamespaceDIE(die); 3844 try_parsing_type = false; 3845 break; 3846 3847 case DW_TAG_lexical_block: 3848 decl_ctx = GetDeclContextForBlock(die); 3849 try_parsing_type = false; 3850 break; 3851 3852 default: 3853 break; 3854 } 3855 3856 if (decl_ctx == nullptr && try_parsing_type) { 3857 Type *type = die.GetDWARF()->ResolveType(die); 3858 if (type) 3859 decl_ctx = GetCachedClangDeclContextForDIE(die); 3860 } 3861 3862 if (decl_ctx) { 3863 LinkDeclContextToDIE(decl_ctx, die); 3864 return decl_ctx; 3865 } 3866 } 3867 return nullptr; 3868 } 3869 3870 static bool IsSubroutine(const DWARFDIE &die) { 3871 switch (die.Tag()) { 3872 case DW_TAG_subprogram: 3873 case DW_TAG_inlined_subroutine: 3874 return true; 3875 default: 3876 return false; 3877 } 3878 } 3879 3880 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3881 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3882 if (IsSubroutine(candidate)) { 3883 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3884 return candidate; 3885 } else { 3886 return DWARFDIE(); 3887 } 3888 } 3889 } 3890 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3891 "something not in a function"); 3892 return DWARFDIE(); 3893 } 3894 3895 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3896 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3897 candidate = candidate.GetSibling()) { 3898 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3899 return candidate; 3900 } 3901 } 3902 return DWARFDIE(); 3903 } 3904 3905 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3906 const DWARFDIE &function) { 3907 assert(IsSubroutine(function)); 3908 for (DWARFDIE context = block; context != function.GetParent(); 3909 context = context.GetParent()) { 3910 assert(!IsSubroutine(context) || context == function); 3911 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3912 return child; 3913 } 3914 } 3915 return DWARFDIE(); 3916 } 3917 3918 clang::DeclContext * 3919 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3920 assert(die.Tag() == DW_TAG_lexical_block); 3921 DWARFDIE containing_function_with_abstract_origin = 3922 GetContainingFunctionWithAbstractOrigin(die); 3923 if (!containing_function_with_abstract_origin) { 3924 return (clang::DeclContext *)ResolveBlockDIE(die); 3925 } 3926 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3927 die, containing_function_with_abstract_origin); 3928 CompilerDeclContext decl_context = 3929 GetDeclContextContainingUIDFromDWARF(child); 3930 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3931 } 3932 3933 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3934 if (die && die.Tag() == DW_TAG_lexical_block) { 3935 clang::BlockDecl *decl = 3936 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3937 3938 if (!decl) { 3939 DWARFDIE decl_context_die; 3940 clang::DeclContext *decl_context = 3941 GetClangDeclContextContainingDIE(die, &decl_context_die); 3942 decl = m_ast.CreateBlockDeclaration(decl_context); 3943 3944 if (decl) 3945 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3946 } 3947 3948 return decl; 3949 } 3950 return nullptr; 3951 } 3952 3953 clang::NamespaceDecl * 3954 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3955 if (die && die.Tag() == DW_TAG_namespace) { 3956 // See if we already parsed this namespace DIE and associated it with a 3957 // uniqued namespace declaration 3958 clang::NamespaceDecl *namespace_decl = 3959 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3960 if (namespace_decl) 3961 return namespace_decl; 3962 else { 3963 const char *namespace_name = die.GetName(); 3964 clang::DeclContext *containing_decl_ctx = 3965 GetClangDeclContextContainingDIE(die, nullptr); 3966 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3967 containing_decl_ctx); 3968 Log *log = 3969 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3970 if (log) { 3971 SymbolFileDWARF *dwarf = die.GetDWARF(); 3972 if (namespace_name) { 3973 dwarf->GetObjectFile()->GetModule()->LogMessage( 3974 log, "ASTContext => %p: 0x%8.8" PRIx64 3975 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3976 "clang::NamespaceDecl *%p (original = %p)", 3977 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3978 namespace_name, static_cast<void *>(namespace_decl), 3979 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3980 } else { 3981 dwarf->GetObjectFile()->GetModule()->LogMessage( 3982 log, "ASTContext => %p: 0x%8.8" PRIx64 3983 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3984 "(original = %p)", 3985 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3986 static_cast<void *>(namespace_decl), 3987 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3988 } 3989 } 3990 3991 if (namespace_decl) 3992 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3993 return namespace_decl; 3994 } 3995 } 3996 return nullptr; 3997 } 3998 3999 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 4000 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 4001 SymbolFileDWARF *dwarf = die.GetDWARF(); 4002 4003 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 4004 4005 if (decl_ctx_die_copy) 4006 *decl_ctx_die_copy = decl_ctx_die; 4007 4008 if (decl_ctx_die) { 4009 clang::DeclContext *clang_decl_ctx = 4010 GetClangDeclContextForDIE(decl_ctx_die); 4011 if (clang_decl_ctx) 4012 return clang_decl_ctx; 4013 } 4014 return m_ast.GetTranslationUnitDecl(); 4015 } 4016 4017 clang::DeclContext * 4018 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 4019 if (die) { 4020 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 4021 if (pos != m_die_to_decl_ctx.end()) 4022 return pos->second; 4023 } 4024 return nullptr; 4025 } 4026 4027 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 4028 const DWARFDIE &die) { 4029 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 4030 // There can be many DIEs for a single decl context 4031 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 4032 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 4033 } 4034 4035 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 4036 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 4037 lldb_private::Type *class_type, DWARFDIECollection &failures) { 4038 if (!class_type || !src_class_die || !dst_class_die) 4039 return false; 4040 if (src_class_die.Tag() != dst_class_die.Tag()) 4041 return false; 4042 4043 // We need to complete the class type so we can get all of the method types 4044 // parsed so we can then unique those types to their equivalent counterparts 4045 // in "dst_cu" and "dst_class_die" 4046 class_type->GetFullCompilerType(); 4047 4048 DWARFDIE src_die; 4049 DWARFDIE dst_die; 4050 UniqueCStringMap<DWARFDIE> src_name_to_die; 4051 UniqueCStringMap<DWARFDIE> dst_name_to_die; 4052 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 4053 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 4054 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 4055 src_die = src_die.GetSibling()) { 4056 if (src_die.Tag() == DW_TAG_subprogram) { 4057 // Make sure this is a declaration and not a concrete instance by looking 4058 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4059 // are placed inside the class definitions and shouldn't be included in 4060 // the list of things are are tracking here. 4061 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4062 const char *src_name = src_die.GetMangledName(); 4063 if (src_name) { 4064 ConstString src_const_name(src_name); 4065 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4066 src_name_to_die_artificial.Append(src_const_name, src_die); 4067 else 4068 src_name_to_die.Append(src_const_name, src_die); 4069 } 4070 } 4071 } 4072 } 4073 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 4074 dst_die = dst_die.GetSibling()) { 4075 if (dst_die.Tag() == DW_TAG_subprogram) { 4076 // Make sure this is a declaration and not a concrete instance by looking 4077 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4078 // are placed inside the class definitions and shouldn't be included in 4079 // the list of things are are tracking here. 4080 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4081 const char *dst_name = dst_die.GetMangledName(); 4082 if (dst_name) { 4083 ConstString dst_const_name(dst_name); 4084 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4085 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 4086 else 4087 dst_name_to_die.Append(dst_const_name, dst_die); 4088 } 4089 } 4090 } 4091 } 4092 const uint32_t src_size = src_name_to_die.GetSize(); 4093 const uint32_t dst_size = dst_name_to_die.GetSize(); 4094 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 4095 // DWARF_LOG_TYPE_COMPLETION)); 4096 4097 // Is everything kosher so we can go through the members at top speed? 4098 bool fast_path = true; 4099 4100 if (src_size != dst_size) { 4101 if (src_size != 0 && dst_size != 0) { 4102 if (log) 4103 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 4104 "but they didn't have the same size (src=%d, dst=%d)", 4105 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4106 src_size, dst_size); 4107 } 4108 4109 fast_path = false; 4110 } 4111 4112 uint32_t idx; 4113 4114 if (fast_path) { 4115 for (idx = 0; idx < src_size; ++idx) { 4116 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4117 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4118 4119 if (src_die.Tag() != dst_die.Tag()) { 4120 if (log) 4121 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4122 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 4123 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4124 src_die.GetOffset(), src_die.GetTagAsCString(), 4125 dst_die.GetOffset(), dst_die.GetTagAsCString()); 4126 fast_path = false; 4127 } 4128 4129 const char *src_name = src_die.GetMangledName(); 4130 const char *dst_name = dst_die.GetMangledName(); 4131 4132 // Make sure the names match 4133 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 4134 continue; 4135 4136 if (log) 4137 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4138 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 4139 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4140 src_die.GetOffset(), src_name, dst_die.GetOffset(), 4141 dst_name); 4142 4143 fast_path = false; 4144 } 4145 } 4146 4147 DWARFASTParserClang *src_dwarf_ast_parser = 4148 (DWARFASTParserClang *)src_die.GetDWARFParser(); 4149 DWARFASTParserClang *dst_dwarf_ast_parser = 4150 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 4151 4152 // Now do the work of linking the DeclContexts and Types. 4153 if (fast_path) { 4154 // We can do this quickly. Just run across the tables index-for-index since 4155 // we know each node has matching names and tags. 4156 for (idx = 0; idx < src_size; ++idx) { 4157 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4158 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4159 4160 clang::DeclContext *src_decl_ctx = 4161 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4162 if (src_decl_ctx) { 4163 if (log) 4164 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4165 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4166 dst_die.GetOffset()); 4167 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4168 } else { 4169 if (log) 4170 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4171 "0x%8.8x, but none was found", 4172 src_die.GetOffset(), dst_die.GetOffset()); 4173 } 4174 4175 Type *src_child_type = 4176 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4177 if (src_child_type) { 4178 if (log) 4179 log->Printf( 4180 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4181 static_cast<void *>(src_child_type), src_child_type->GetID(), 4182 src_die.GetOffset(), dst_die.GetOffset()); 4183 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4184 } else { 4185 if (log) 4186 log->Printf("warning: tried to unique lldb_private::Type from " 4187 "0x%8.8x for 0x%8.8x, but none was found", 4188 src_die.GetOffset(), dst_die.GetOffset()); 4189 } 4190 } 4191 } else { 4192 // We must do this slowly. For each member of the destination, look 4193 // up a member in the source with the same name, check its tag, and 4194 // unique them if everything matches up. Report failures. 4195 4196 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4197 src_name_to_die.Sort(); 4198 4199 for (idx = 0; idx < dst_size; ++idx) { 4200 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4201 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4202 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4203 4204 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4205 clang::DeclContext *src_decl_ctx = 4206 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4207 if (src_decl_ctx) { 4208 if (log) 4209 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4210 static_cast<void *>(src_decl_ctx), 4211 src_die.GetOffset(), dst_die.GetOffset()); 4212 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4213 } else { 4214 if (log) 4215 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4216 "for 0x%8.8x, but none was found", 4217 src_die.GetOffset(), dst_die.GetOffset()); 4218 } 4219 4220 Type *src_child_type = 4221 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4222 if (src_child_type) { 4223 if (log) 4224 log->Printf("uniquing type %p (uid=0x%" PRIx64 4225 ") from 0x%8.8x for 0x%8.8x", 4226 static_cast<void *>(src_child_type), 4227 src_child_type->GetID(), src_die.GetOffset(), 4228 dst_die.GetOffset()); 4229 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4230 src_child_type; 4231 } else { 4232 if (log) 4233 log->Printf("warning: tried to unique lldb_private::Type from " 4234 "0x%8.8x for 0x%8.8x, but none was found", 4235 src_die.GetOffset(), dst_die.GetOffset()); 4236 } 4237 } else { 4238 if (log) 4239 log->Printf("warning: couldn't find a match for 0x%8.8x", 4240 dst_die.GetOffset()); 4241 4242 failures.Append(dst_die); 4243 } 4244 } 4245 } 4246 } 4247 4248 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4249 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4250 4251 if (src_size_artificial && dst_size_artificial) { 4252 dst_name_to_die_artificial.Sort(); 4253 4254 for (idx = 0; idx < src_size_artificial; ++idx) { 4255 ConstString src_name_artificial = 4256 src_name_to_die_artificial.GetCStringAtIndex(idx); 4257 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4258 dst_die = 4259 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4260 4261 if (dst_die) { 4262 // Both classes have the artificial types, link them 4263 clang::DeclContext *src_decl_ctx = 4264 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4265 if (src_decl_ctx) { 4266 if (log) 4267 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4268 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4269 dst_die.GetOffset()); 4270 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4271 } else { 4272 if (log) 4273 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4274 "for 0x%8.8x, but none was found", 4275 src_die.GetOffset(), dst_die.GetOffset()); 4276 } 4277 4278 Type *src_child_type = 4279 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4280 if (src_child_type) { 4281 if (log) 4282 log->Printf( 4283 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4284 static_cast<void *>(src_child_type), src_child_type->GetID(), 4285 src_die.GetOffset(), dst_die.GetOffset()); 4286 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4287 } else { 4288 if (log) 4289 log->Printf("warning: tried to unique lldb_private::Type from " 4290 "0x%8.8x for 0x%8.8x, but none was found", 4291 src_die.GetOffset(), dst_die.GetOffset()); 4292 } 4293 } 4294 } 4295 } 4296 4297 if (dst_size_artificial) { 4298 for (idx = 0; idx < dst_size_artificial; ++idx) { 4299 ConstString dst_name_artificial = 4300 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4301 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4302 if (log) 4303 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4304 "method '%s'", 4305 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4306 4307 failures.Append(dst_die); 4308 } 4309 } 4310 4311 return (failures.Size() != 0); 4312 } 4313