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