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