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