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