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