1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "DWARFASTParserClang.h" 11 #include "DWARFCompileUnit.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "DWARFDIE.h" 16 #include "DWARFDIECollection.h" 17 #include "SymbolFileDWARF.h" 18 #include "SymbolFileDWARFDebugMap.h" 19 #include "UniqueDWARFASTType.h" 20 21 #include "lldb/Interpreter/Args.h" 22 #include "lldb/Core/Log.h" 23 #include "lldb/Core/Module.h" 24 #include "lldb/Core/StreamString.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 28 #include "lldb/Symbol/CompileUnit.h" 29 #include "lldb/Symbol/Function.h" 30 #include "lldb/Symbol/ObjectFile.h" 31 #include "lldb/Symbol/TypeList.h" 32 #include "lldb/Target/Language.h" 33 #include "Plugins/Language/ObjC/ObjCLanguage.h" 34 35 #include "clang/AST/DeclCXX.h" 36 #include "clang/AST/DeclObjC.h" 37 38 #include <map> 39 #include <vector> 40 41 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 42 43 #ifdef ENABLE_DEBUG_PRINTF 44 #include <stdio.h> 45 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 46 #else 47 #define DEBUG_PRINTF(fmt, ...) 48 #endif 49 50 51 using namespace lldb; 52 using namespace lldb_private; 53 DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) : 54 m_ast (ast), 55 m_die_to_decl_ctx (), 56 m_decl_ctx_to_die () 57 { 58 } 59 60 DWARFASTParserClang::~DWARFASTParserClang () 61 { 62 } 63 64 65 static AccessType 66 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility) 67 { 68 switch (dwarf_accessibility) 69 { 70 case DW_ACCESS_public: return eAccessPublic; 71 case DW_ACCESS_private: return eAccessPrivate; 72 case DW_ACCESS_protected: return eAccessProtected; 73 default: break; 74 } 75 return eAccessNone; 76 } 77 78 static bool 79 DeclKindIsCXXClass (clang::Decl::Kind decl_kind) 80 { 81 switch (decl_kind) 82 { 83 case clang::Decl::CXXRecord: 84 case clang::Decl::ClassTemplateSpecialization: 85 return true; 86 default: 87 break; 88 } 89 return false; 90 } 91 92 struct BitfieldInfo 93 { 94 uint64_t bit_size; 95 uint64_t bit_offset; 96 97 BitfieldInfo () : 98 bit_size (LLDB_INVALID_ADDRESS), 99 bit_offset (LLDB_INVALID_ADDRESS) 100 { 101 } 102 103 void 104 Clear() 105 { 106 bit_size = LLDB_INVALID_ADDRESS; 107 bit_offset = LLDB_INVALID_ADDRESS; 108 } 109 110 bool IsValid () 111 { 112 return (bit_size != LLDB_INVALID_ADDRESS) && 113 (bit_offset != LLDB_INVALID_ADDRESS); 114 } 115 }; 116 117 TypeSP 118 DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc, 119 const DWARFDIE &die, 120 Log *log, 121 bool *type_is_new_ptr) 122 { 123 TypeSP type_sp; 124 125 if (type_is_new_ptr) 126 *type_is_new_ptr = false; 127 128 AccessType accessibility = eAccessNone; 129 if (die) 130 { 131 SymbolFileDWARF *dwarf = die.GetDWARF(); 132 if (log) 133 { 134 DWARFDIE context_die; 135 clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die); 136 137 dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 138 die.GetOffset(), 139 static_cast<void*>(context), 140 context_die.GetOffset(), 141 die.GetTagAsCString(), 142 die.GetName()); 143 144 } 145 // 146 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 147 // if (log && dwarf_cu) 148 // { 149 // StreamString s; 150 // die->DumpLocation (this, dwarf_cu, s); 151 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 152 // 153 // } 154 155 Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE()); 156 TypeList* type_list = dwarf->GetTypeList(); 157 if (type_ptr == NULL) 158 { 159 if (type_is_new_ptr) 160 *type_is_new_ptr = true; 161 162 const dw_tag_t tag = die.Tag(); 163 164 bool is_forward_declaration = false; 165 DWARFAttributes attributes; 166 const char *type_name_cstr = NULL; 167 ConstString type_name_const_str; 168 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 169 uint64_t byte_size = 0; 170 Declaration decl; 171 172 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 173 CompilerType clang_type; 174 DWARFFormValue form_value; 175 176 dw_attr_t attr; 177 178 switch (tag) 179 { 180 case DW_TAG_base_type: 181 case DW_TAG_pointer_type: 182 case DW_TAG_reference_type: 183 case DW_TAG_rvalue_reference_type: 184 case DW_TAG_typedef: 185 case DW_TAG_const_type: 186 case DW_TAG_restrict_type: 187 case DW_TAG_volatile_type: 188 case DW_TAG_unspecified_type: 189 { 190 // Set a bit that lets us know that we are currently parsing this 191 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 192 193 const size_t num_attributes = die.GetAttributes (attributes); 194 uint32_t encoding = 0; 195 lldb::user_id_t encoding_uid = LLDB_INVALID_UID; 196 197 if (num_attributes > 0) 198 { 199 uint32_t i; 200 for (i=0; i<num_attributes; ++i) 201 { 202 attr = attributes.AttributeAtIndex(i); 203 if (attributes.ExtractFormValueAtIndex(i, form_value)) 204 { 205 switch (attr) 206 { 207 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 208 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 209 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 210 case DW_AT_name: 211 212 type_name_cstr = form_value.AsCString(); 213 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't 214 // include the "&"... 215 if (tag == DW_TAG_reference_type) 216 { 217 if (strchr (type_name_cstr, '&') == NULL) 218 type_name_cstr = NULL; 219 } 220 if (type_name_cstr) 221 type_name_const_str.SetCString(type_name_cstr); 222 break; 223 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 224 case DW_AT_encoding: encoding = form_value.Unsigned(); break; 225 case DW_AT_type: encoding_uid = DIERef(form_value).GetUID(); break; 226 default: 227 case DW_AT_sibling: 228 break; 229 } 230 } 231 } 232 } 233 234 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid); 235 236 switch (tag) 237 { 238 default: 239 break; 240 241 case DW_TAG_unspecified_type: 242 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 243 strcmp(type_name_cstr, "decltype(nullptr)") == 0 ) 244 { 245 resolve_state = Type::eResolveStateFull; 246 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 247 break; 248 } 249 // Fall through to base type below in case we can handle the type there... 250 251 case DW_TAG_base_type: 252 resolve_state = Type::eResolveStateFull; 253 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr, 254 encoding, 255 byte_size * 8); 256 break; 257 258 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break; 259 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break; 260 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; 261 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break; 262 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break; 263 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break; 264 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break; 265 } 266 267 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL) 268 { 269 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 270 271 if (translation_unit_is_objc) 272 { 273 if (type_name_cstr != NULL) 274 { 275 static ConstString g_objc_type_name_id("id"); 276 static ConstString g_objc_type_name_Class("Class"); 277 static ConstString g_objc_type_name_selector("SEL"); 278 279 if (type_name_const_str == g_objc_type_name_id) 280 { 281 if (log) 282 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 283 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.", 284 die.GetOffset(), 285 die.GetTagAsCString(), 286 die.GetName()); 287 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 288 encoding_data_type = Type::eEncodingIsUID; 289 encoding_uid = LLDB_INVALID_UID; 290 resolve_state = Type::eResolveStateFull; 291 292 } 293 else if (type_name_const_str == g_objc_type_name_Class) 294 { 295 if (log) 296 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 297 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.", 298 die.GetOffset(), 299 die.GetTagAsCString(), 300 die.GetName()); 301 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 302 encoding_data_type = Type::eEncodingIsUID; 303 encoding_uid = LLDB_INVALID_UID; 304 resolve_state = Type::eResolveStateFull; 305 } 306 else if (type_name_const_str == g_objc_type_name_selector) 307 { 308 if (log) 309 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 310 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.", 311 die.GetOffset(), 312 die.GetTagAsCString(), 313 die.GetName()); 314 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 315 encoding_data_type = Type::eEncodingIsUID; 316 encoding_uid = LLDB_INVALID_UID; 317 resolve_state = Type::eResolveStateFull; 318 } 319 } 320 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID) 321 { 322 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id". 323 324 const DWARFDIE encoding_die = die.GetDIE(encoding_uid); 325 326 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) 327 { 328 if (const char *struct_name = encoding_die.GetName()) 329 { 330 if (!strcmp(struct_name, "objc_object")) 331 { 332 if (log) 333 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 334 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.", 335 die.GetOffset(), 336 die.GetTagAsCString(), 337 die.GetName()); 338 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 339 encoding_data_type = Type::eEncodingIsUID; 340 encoding_uid = LLDB_INVALID_UID; 341 resolve_state = Type::eResolveStateFull; 342 } 343 } 344 } 345 } 346 } 347 } 348 349 type_sp.reset( new Type (die.GetID(), 350 dwarf, 351 type_name_const_str, 352 byte_size, 353 NULL, 354 encoding_uid, 355 encoding_data_type, 356 &decl, 357 clang_type, 358 resolve_state)); 359 360 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 361 362 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false); 363 // if (encoding_type != NULL) 364 // { 365 // if (encoding_type != DIE_IS_BEING_PARSED) 366 // type_sp->SetEncodingType(encoding_type); 367 // else 368 // m_indirect_fixups.push_back(type_sp.get()); 369 // } 370 } 371 break; 372 373 case DW_TAG_structure_type: 374 case DW_TAG_union_type: 375 case DW_TAG_class_type: 376 { 377 // Set a bit that lets us know that we are currently parsing this 378 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 379 bool byte_size_valid = false; 380 381 LanguageType class_language = eLanguageTypeUnknown; 382 bool is_complete_objc_class = false; 383 //bool struct_is_class = false; 384 const size_t num_attributes = die.GetAttributes (attributes); 385 if (num_attributes > 0) 386 { 387 uint32_t i; 388 for (i=0; i<num_attributes; ++i) 389 { 390 attr = attributes.AttributeAtIndex(i); 391 if (attributes.ExtractFormValueAtIndex(i, form_value)) 392 { 393 switch (attr) 394 { 395 case DW_AT_decl_file: 396 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) 397 { 398 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always 399 // point to the compile unit file, so we clear this invalid value 400 // so that we can still unique types efficiently. 401 decl.SetFile(FileSpec ("<invalid>", false)); 402 } 403 else 404 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); 405 break; 406 407 case DW_AT_decl_line: 408 decl.SetLine(form_value.Unsigned()); 409 break; 410 411 case DW_AT_decl_column: 412 decl.SetColumn(form_value.Unsigned()); 413 break; 414 415 case DW_AT_name: 416 type_name_cstr = form_value.AsCString(); 417 type_name_const_str.SetCString(type_name_cstr); 418 break; 419 420 case DW_AT_byte_size: 421 byte_size = form_value.Unsigned(); 422 byte_size_valid = true; 423 break; 424 425 case DW_AT_accessibility: 426 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 427 break; 428 429 case DW_AT_declaration: 430 is_forward_declaration = form_value.Boolean(); 431 break; 432 433 case DW_AT_APPLE_runtime_class: 434 class_language = (LanguageType)form_value.Signed(); 435 break; 436 437 case DW_AT_APPLE_objc_complete_type: 438 is_complete_objc_class = form_value.Signed(); 439 break; 440 441 case DW_AT_allocated: 442 case DW_AT_associated: 443 case DW_AT_data_location: 444 case DW_AT_description: 445 case DW_AT_start_scope: 446 case DW_AT_visibility: 447 default: 448 case DW_AT_sibling: 449 break; 450 } 451 } 452 } 453 } 454 455 // UniqueDWARFASTType is large, so don't create a local variables on the 456 // stack, put it on the heap. This function is often called recursively 457 // and clang isn't good and sharing the stack space for variables in different blocks. 458 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType()); 459 460 // Only try and unique the type if it has a name. 461 if (type_name_const_str && 462 dwarf->GetUniqueDWARFASTTypeMap().Find (type_name_const_str, 463 die, 464 decl, 465 byte_size_valid ? byte_size : -1, 466 *unique_ast_entry_ap)) 467 { 468 // We have already parsed this type or from another 469 // compile unit. GCC loves to use the "one definition 470 // rule" which can result in multiple definitions 471 // of the same class over and over in each compile 472 // unit. 473 type_sp = unique_ast_entry_ap->m_type_sp; 474 if (type_sp) 475 { 476 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 477 return type_sp; 478 } 479 } 480 481 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 482 483 int tag_decl_kind = -1; 484 AccessType default_accessibility = eAccessNone; 485 if (tag == DW_TAG_structure_type) 486 { 487 tag_decl_kind = clang::TTK_Struct; 488 default_accessibility = eAccessPublic; 489 } 490 else if (tag == DW_TAG_union_type) 491 { 492 tag_decl_kind = clang::TTK_Union; 493 default_accessibility = eAccessPublic; 494 } 495 else if (tag == DW_TAG_class_type) 496 { 497 tag_decl_kind = clang::TTK_Class; 498 default_accessibility = eAccessPrivate; 499 } 500 501 if (byte_size_valid && byte_size == 0 && type_name_cstr && 502 die.HasChildren() == false && 503 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) 504 { 505 // Work around an issue with clang at the moment where 506 // forward declarations for objective C classes are emitted 507 // as: 508 // DW_TAG_structure_type [2] 509 // DW_AT_name( "ForwardObjcClass" ) 510 // DW_AT_byte_size( 0x00 ) 511 // DW_AT_decl_file( "..." ) 512 // DW_AT_decl_line( 1 ) 513 // 514 // Note that there is no DW_AT_declaration and there are 515 // no children, and the byte size is zero. 516 is_forward_declaration = true; 517 } 518 519 if (class_language == eLanguageTypeObjC || 520 class_language == eLanguageTypeObjC_plus_plus) 521 { 522 if (!is_complete_objc_class && die.Supports_DW_AT_APPLE_objc_complete_type()) 523 { 524 // We have a valid eSymbolTypeObjCClass class symbol whose 525 // name matches the current objective C class that we 526 // are trying to find and this DIE isn't the complete 527 // definition (we checked is_complete_objc_class above and 528 // know it is false), so the real definition is in here somewhere 529 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 530 531 if (!type_sp) 532 { 533 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 534 if (debug_map_symfile) 535 { 536 // We weren't able to find a full declaration in 537 // this DWARF, see if we have a declaration anywhere 538 // else... 539 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 540 } 541 } 542 543 if (type_sp) 544 { 545 if (log) 546 { 547 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 548 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64, 549 static_cast<void*>(this), 550 die.GetOffset(), 551 DW_TAG_value_to_name(tag), 552 type_name_cstr, 553 type_sp->GetID()); 554 } 555 556 // We found a real definition for this type elsewhere 557 // so lets use it and cache the fact that we found 558 // a complete type for this die 559 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 560 return type_sp; 561 } 562 } 563 } 564 565 566 if (is_forward_declaration) 567 { 568 // We have a forward declaration to a type and we need 569 // to try and find a full declaration. We look in the 570 // current type index just in case we have a forward 571 // declaration followed by an actual declarations in the 572 // DWARF. If this fails, we need to look elsewhere... 573 if (log) 574 { 575 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 576 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type", 577 static_cast<void*>(this), 578 die.GetOffset(), 579 DW_TAG_value_to_name(tag), 580 type_name_cstr); 581 } 582 583 DWARFDeclContext die_decl_ctx; 584 die.GetDWARFDeclContext(die_decl_ctx); 585 586 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str); 587 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 588 589 if (!type_sp) 590 { 591 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 592 if (debug_map_symfile) 593 { 594 // We weren't able to find a full declaration in 595 // this DWARF, see if we have a declaration anywhere 596 // else... 597 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 598 } 599 } 600 601 if (type_sp) 602 { 603 if (log) 604 { 605 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 606 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 607 static_cast<void*>(this), 608 die.GetOffset(), 609 DW_TAG_value_to_name(tag), 610 type_name_cstr, 611 type_sp->GetID()); 612 } 613 614 // We found a real definition for this type elsewhere 615 // so lets use it and cache the fact that we found 616 // a complete type for this die 617 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 618 return type_sp; 619 } 620 } 621 assert (tag_decl_kind != -1); 622 bool clang_type_was_created = false; 623 clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 624 if (!clang_type) 625 { 626 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 627 if (accessibility == eAccessNone && decl_ctx) 628 { 629 // Check the decl context that contains this class/struct/union. 630 // If it is a class we must give it an accessibility. 631 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 632 if (DeclKindIsCXXClass (containing_decl_kind)) 633 accessibility = default_accessibility; 634 } 635 636 ClangASTMetadata metadata; 637 metadata.SetUserID(die.GetID()); 638 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die)); 639 640 if (type_name_cstr && strchr (type_name_cstr, '<')) 641 { 642 ClangASTContext::TemplateParameterInfos template_param_infos; 643 if (ParseTemplateParameterInfos (die, template_param_infos)) 644 { 645 clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx, 646 accessibility, 647 type_name_cstr, 648 tag_decl_kind, 649 template_param_infos); 650 651 clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx, 652 class_template_decl, 653 tag_decl_kind, 654 template_param_infos); 655 clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl); 656 clang_type_was_created = true; 657 658 m_ast.SetMetadata (class_template_decl, metadata); 659 m_ast.SetMetadata (class_specialization_decl, metadata); 660 } 661 } 662 663 if (!clang_type_was_created) 664 { 665 clang_type_was_created = true; 666 clang_type = m_ast.CreateRecordType (decl_ctx, 667 accessibility, 668 type_name_cstr, 669 tag_decl_kind, 670 class_language, 671 &metadata); 672 } 673 } 674 675 // Store a forward declaration to this class type in case any 676 // parameters in any class methods need it for the clang 677 // types for function prototypes. 678 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 679 type_sp.reset (new Type (die.GetID(), 680 dwarf, 681 type_name_const_str, 682 byte_size, 683 NULL, 684 LLDB_INVALID_UID, 685 Type::eEncodingIsUID, 686 &decl, 687 clang_type, 688 Type::eResolveStateForward)); 689 690 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 691 692 693 // Add our type to the unique type map so we don't 694 // end up creating many copies of the same type over 695 // and over in the ASTContext for our module 696 unique_ast_entry_ap->m_type_sp = type_sp; 697 unique_ast_entry_ap->m_die = die; 698 unique_ast_entry_ap->m_declaration = decl; 699 unique_ast_entry_ap->m_byte_size = byte_size; 700 dwarf->GetUniqueDWARFASTTypeMap().Insert (type_name_const_str, 701 *unique_ast_entry_ap); 702 703 if (is_forward_declaration && die.HasChildren()) 704 { 705 // Check to see if the DIE actually has a definition, some version of GCC will 706 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram, 707 // members, or inheritance, so we can't trust it 708 DWARFDIE child_die = die.GetFirstChild(); 709 while (child_die) 710 { 711 switch (child_die.Tag()) 712 { 713 case DW_TAG_inheritance: 714 case DW_TAG_subprogram: 715 case DW_TAG_member: 716 case DW_TAG_APPLE_property: 717 case DW_TAG_class_type: 718 case DW_TAG_structure_type: 719 case DW_TAG_enumeration_type: 720 case DW_TAG_typedef: 721 case DW_TAG_union_type: 722 child_die.Clear(); 723 is_forward_declaration = false; 724 break; 725 default: 726 child_die = child_die.GetSibling(); 727 break; 728 } 729 } 730 } 731 732 if (!is_forward_declaration) 733 { 734 // Always start the definition for a class type so that 735 // if the class has child classes or types that require 736 // the class to be created for use as their decl contexts 737 // the class will be ready to accept these child definitions. 738 if (die.HasChildren() == false) 739 { 740 // No children for this struct/union/class, lets finish it 741 ClangASTContext::StartTagDeclarationDefinition (clang_type); 742 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 743 744 if (tag == DW_TAG_structure_type) // this only applies in C 745 { 746 clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type); 747 748 if (record_decl) 749 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo())); 750 } 751 } 752 else if (clang_type_was_created) 753 { 754 // Start the definition if the class is not objective C since 755 // the underlying decls respond to isCompleteDefinition(). Objective 756 // C decls don't respond to isCompleteDefinition() so we can't 757 // start the declaration definition right away. For C++ class/union/structs 758 // we want to start the definition in case the class is needed as the 759 // declaration context for a contained class or type without the need 760 // to complete that type.. 761 762 if (class_language != eLanguageTypeObjC && 763 class_language != eLanguageTypeObjC_plus_plus) 764 ClangASTContext::StartTagDeclarationDefinition (clang_type); 765 766 // Leave this as a forward declaration until we need 767 // to know the details of the type. lldb_private::Type 768 // will automatically call the SymbolFile virtual function 769 // "SymbolFileDWARF::CompleteType(Type *)" 770 // When the definition needs to be defined. 771 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType(); 772 dwarf->GetForwardDeclClangTypeToDie()[ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] = die.GetDIERef(); 773 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true); 774 } 775 } 776 } 777 break; 778 779 case DW_TAG_enumeration_type: 780 { 781 // Set a bit that lets us know that we are currently parsing this 782 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 783 784 DWARFFormValue encoding_form; 785 786 const size_t num_attributes = die.GetAttributes (attributes); 787 if (num_attributes > 0) 788 { 789 uint32_t i; 790 791 for (i=0; i<num_attributes; ++i) 792 { 793 attr = attributes.AttributeAtIndex(i); 794 if (attributes.ExtractFormValueAtIndex(i, form_value)) 795 { 796 switch (attr) 797 { 798 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 799 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 800 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 801 case DW_AT_name: 802 type_name_cstr = form_value.AsCString(); 803 type_name_const_str.SetCString(type_name_cstr); 804 break; 805 case DW_AT_type: encoding_form = form_value; break; 806 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 807 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 808 case DW_AT_declaration: break; //is_forward_declaration = form_value.Boolean(); break; 809 case DW_AT_allocated: 810 case DW_AT_associated: 811 case DW_AT_bit_stride: 812 case DW_AT_byte_stride: 813 case DW_AT_data_location: 814 case DW_AT_description: 815 case DW_AT_start_scope: 816 case DW_AT_visibility: 817 case DW_AT_specification: 818 case DW_AT_abstract_origin: 819 case DW_AT_sibling: 820 break; 821 } 822 } 823 } 824 825 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 826 827 CompilerType enumerator_clang_type; 828 clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 829 if (!clang_type) 830 { 831 if (encoding_form.IsValid()) 832 { 833 Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form).GetUID()); 834 if (enumerator_type) 835 enumerator_clang_type = enumerator_type->GetFullCompilerType (); 836 } 837 838 if (!enumerator_clang_type) 839 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL, 840 DW_ATE_signed, 841 byte_size * 8); 842 843 clang_type = m_ast.CreateEnumerationType (type_name_cstr, 844 GetClangDeclContextContainingDIE (die, nullptr), 845 decl, 846 enumerator_clang_type); 847 } 848 else 849 { 850 enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType()); 851 } 852 853 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 854 855 type_sp.reset( new Type (die.GetID(), 856 dwarf, 857 type_name_const_str, 858 byte_size, 859 NULL, 860 DIERef(encoding_form).GetUID(), 861 Type::eEncodingIsUID, 862 &decl, 863 clang_type, 864 Type::eResolveStateForward)); 865 866 ClangASTContext::StartTagDeclarationDefinition (clang_type); 867 if (die.HasChildren()) 868 { 869 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 870 bool is_signed = false; 871 enumerator_clang_type.IsIntegerType(is_signed); 872 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die); 873 } 874 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 875 } 876 } 877 break; 878 879 case DW_TAG_inlined_subroutine: 880 case DW_TAG_subprogram: 881 case DW_TAG_subroutine_type: 882 { 883 // Set a bit that lets us know that we are currently parsing this 884 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 885 886 DWARFFormValue type_die_form; 887 bool is_variadic = false; 888 bool is_inline = false; 889 bool is_static = false; 890 bool is_virtual = false; 891 bool is_explicit = false; 892 bool is_artificial = false; 893 DWARFFormValue specification_die_form; 894 DWARFFormValue abstract_origin_die_form; 895 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 896 897 unsigned type_quals = 0; 898 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern 899 900 901 const size_t num_attributes = die.GetAttributes (attributes); 902 if (num_attributes > 0) 903 { 904 uint32_t i; 905 for (i=0; i<num_attributes; ++i) 906 { 907 attr = attributes.AttributeAtIndex(i); 908 if (attributes.ExtractFormValueAtIndex(i, form_value)) 909 { 910 switch (attr) 911 { 912 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 913 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 914 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 915 case DW_AT_name: 916 type_name_cstr = form_value.AsCString(); 917 type_name_const_str.SetCString(type_name_cstr); 918 break; 919 920 case DW_AT_linkage_name: 921 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&dwarf->get_debug_str_data()); break; 922 case DW_AT_type: type_die_form = form_value; break; 923 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 924 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 925 case DW_AT_inline: is_inline = form_value.Boolean(); break; 926 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break; 927 case DW_AT_explicit: is_explicit = form_value.Boolean(); break; 928 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 929 930 931 case DW_AT_external: 932 if (form_value.Unsigned()) 933 { 934 if (storage == clang::SC_None) 935 storage = clang::SC_Extern; 936 else 937 storage = clang::SC_PrivateExtern; 938 } 939 break; 940 941 case DW_AT_specification: 942 specification_die_form = form_value; 943 break; 944 945 case DW_AT_abstract_origin: 946 abstract_origin_die_form = form_value; 947 break; 948 949 case DW_AT_object_pointer: 950 object_pointer_die_offset = form_value.Reference(); 951 break; 952 953 case DW_AT_allocated: 954 case DW_AT_associated: 955 case DW_AT_address_class: 956 case DW_AT_calling_convention: 957 case DW_AT_data_location: 958 case DW_AT_elemental: 959 case DW_AT_entry_pc: 960 case DW_AT_frame_base: 961 case DW_AT_high_pc: 962 case DW_AT_low_pc: 963 case DW_AT_prototyped: 964 case DW_AT_pure: 965 case DW_AT_ranges: 966 case DW_AT_recursive: 967 case DW_AT_return_addr: 968 case DW_AT_segment: 969 case DW_AT_start_scope: 970 case DW_AT_static_link: 971 case DW_AT_trampoline: 972 case DW_AT_visibility: 973 case DW_AT_vtable_elem_location: 974 case DW_AT_description: 975 case DW_AT_sibling: 976 break; 977 } 978 } 979 } 980 } 981 982 std::string object_pointer_name; 983 if (object_pointer_die_offset != DW_INVALID_OFFSET) 984 { 985 DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset); 986 if (object_pointer_die) 987 { 988 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 989 if (object_pointer_name_cstr) 990 object_pointer_name = object_pointer_name_cstr; 991 } 992 } 993 994 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 995 996 CompilerType return_clang_type; 997 Type *func_type = NULL; 998 999 if (type_die_form.IsValid()) 1000 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1001 1002 if (func_type) 1003 return_clang_type = func_type->GetForwardCompilerType (); 1004 else 1005 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1006 1007 1008 std::vector<CompilerType> function_param_types; 1009 std::vector<clang::ParmVarDecl*> function_param_decls; 1010 1011 // Parse the function children for the parameters 1012 1013 DWARFDIE decl_ctx_die; 1014 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, &decl_ctx_die); 1015 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind(); 1016 1017 const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind); 1018 // Start off static. This will be set to false in ParseChildParameters(...) 1019 // if we find a "this" parameters as the first parameter 1020 if (is_cxx_method) 1021 is_static = true; 1022 1023 if (die.HasChildren()) 1024 { 1025 bool skip_artificial = true; 1026 ParseChildParameters (sc, 1027 containing_decl_ctx, 1028 die, 1029 skip_artificial, 1030 is_static, 1031 is_variadic, 1032 function_param_types, 1033 function_param_decls, 1034 type_quals); 1035 } 1036 1037 // clang_type will get the function prototype clang type after this call 1038 clang_type = m_ast.CreateFunctionType (return_clang_type, 1039 function_param_types.data(), 1040 function_param_types.size(), 1041 is_variadic, 1042 type_quals); 1043 1044 bool ignore_containing_context = false; 1045 1046 if (type_name_cstr) 1047 { 1048 bool type_handled = false; 1049 if (tag == DW_TAG_subprogram || 1050 tag == DW_TAG_inlined_subroutine) 1051 { 1052 ObjCLanguage::MethodName objc_method (type_name_cstr, true); 1053 if (objc_method.IsValid(true)) 1054 { 1055 CompilerType class_opaque_type; 1056 ConstString class_name(objc_method.GetClassName()); 1057 if (class_name) 1058 { 1059 TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false)); 1060 1061 if (complete_objc_class_type_sp) 1062 { 1063 CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType (); 1064 if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type)) 1065 class_opaque_type = type_clang_forward_type; 1066 } 1067 } 1068 1069 if (class_opaque_type) 1070 { 1071 // If accessibility isn't set to anything valid, assume public for 1072 // now... 1073 if (accessibility == eAccessNone) 1074 accessibility = eAccessPublic; 1075 1076 clang::ObjCMethodDecl *objc_method_decl = m_ast.AddMethodToObjCObjectType (class_opaque_type, 1077 type_name_cstr, 1078 clang_type, 1079 accessibility, 1080 is_artificial); 1081 type_handled = objc_method_decl != NULL; 1082 if (type_handled) 1083 { 1084 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1085 m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID()); 1086 } 1087 else 1088 { 1089 dwarf->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message", 1090 die.GetOffset(), 1091 tag, 1092 DW_TAG_value_to_name(tag)); 1093 } 1094 } 1095 } 1096 else if (is_cxx_method) 1097 { 1098 // Look at the parent of this DIE and see if is is 1099 // a class or struct and see if this is actually a 1100 // C++ method 1101 Type *class_type = dwarf->ResolveType (decl_ctx_die); 1102 if (class_type) 1103 { 1104 if (class_type->GetID() != decl_ctx_die.GetID()) 1105 { 1106 // We uniqued the parent class of this function to another class 1107 // so we now need to associate all dies under "decl_ctx_die" to 1108 // DIEs in the DIE for "class_type"... 1109 SymbolFileDWARF *class_symfile = NULL; 1110 DWARFDIE class_type_die; 1111 1112 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1113 if (debug_map_symfile) 1114 { 1115 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID())); 1116 class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1117 } 1118 else 1119 { 1120 class_symfile = dwarf; 1121 class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1122 } 1123 if (class_type_die) 1124 { 1125 DWARFDIECollection failures; 1126 1127 CopyUniqueClassMethodTypes (decl_ctx_die, 1128 class_type_die, 1129 class_type, 1130 failures); 1131 1132 // FIXME do something with these failures that's smarter than 1133 // just dropping them on the ground. Unfortunately classes don't 1134 // like having stuff added to them after their definitions are 1135 // complete... 1136 1137 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1138 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1139 { 1140 type_sp = type_ptr->shared_from_this(); 1141 break; 1142 } 1143 } 1144 } 1145 1146 if (specification_die_form.IsValid()) 1147 { 1148 // We have a specification which we are going to base our function 1149 // prototype off of, so we need this type to be completed so that the 1150 // m_die_to_decl_ctx for the method in the specification has a valid 1151 // clang decl context. 1152 class_type->GetForwardCompilerType (); 1153 // If we have a specification, then the function type should have been 1154 // made with the specification and not with this die. 1155 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form)); 1156 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die); 1157 if (spec_clang_decl_ctx) 1158 { 1159 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1160 } 1161 else 1162 { 1163 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n", 1164 die.GetID(), 1165 specification_die_form.Reference()); 1166 } 1167 type_handled = true; 1168 } 1169 else if (abstract_origin_die_form.IsValid()) 1170 { 1171 // We have a specification which we are going to base our function 1172 // prototype off of, so we need this type to be completed so that the 1173 // m_die_to_decl_ctx for the method in the abstract origin has a valid 1174 // clang decl context. 1175 class_type->GetForwardCompilerType (); 1176 1177 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1178 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die); 1179 if (abs_clang_decl_ctx) 1180 { 1181 LinkDeclContextToDIE (abs_clang_decl_ctx, die); 1182 } 1183 else 1184 { 1185 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n", 1186 die.GetID(), 1187 abstract_origin_die_form.Reference()); 1188 } 1189 type_handled = true; 1190 } 1191 else 1192 { 1193 CompilerType class_opaque_type = class_type->GetForwardCompilerType (); 1194 if (ClangASTContext::IsCXXClassType(class_opaque_type)) 1195 { 1196 if (class_opaque_type.IsBeingDefined ()) 1197 { 1198 // Neither GCC 4.2 nor clang++ currently set a valid accessibility 1199 // in the DWARF for C++ methods... Default to public for now... 1200 if (accessibility == eAccessNone) 1201 accessibility = eAccessPublic; 1202 1203 if (!is_static && !die.HasChildren()) 1204 { 1205 // We have a C++ member function with no children (this pointer!) 1206 // and clang will get mad if we try and make a function that isn't 1207 // well formed in the DWARF, so we will just skip it... 1208 type_handled = true; 1209 } 1210 else 1211 { 1212 clang::CXXMethodDecl *cxx_method_decl; 1213 // REMOVE THE CRASH DESCRIPTION BELOW 1214 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1215 type_name_cstr, 1216 class_type->GetName().GetCString(), 1217 die.GetID(), 1218 dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str()); 1219 1220 const bool is_attr_used = false; 1221 1222 cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(), 1223 type_name_cstr, 1224 clang_type, 1225 accessibility, 1226 is_virtual, 1227 is_static, 1228 is_inline, 1229 is_explicit, 1230 is_attr_used, 1231 is_artificial); 1232 1233 type_handled = cxx_method_decl != NULL; 1234 1235 if (type_handled) 1236 { 1237 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die); 1238 1239 Host::SetCrashDescription (NULL); 1240 1241 1242 ClangASTMetadata metadata; 1243 metadata.SetUserID(die.GetID()); 1244 1245 if (!object_pointer_name.empty()) 1246 { 1247 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1248 if (log) 1249 log->Printf ("Setting object pointer name: %s on method object %p.\n", 1250 object_pointer_name.c_str(), 1251 static_cast<void*>(cxx_method_decl)); 1252 } 1253 m_ast.SetMetadata (cxx_method_decl, metadata); 1254 } 1255 else 1256 { 1257 ignore_containing_context = true; 1258 } 1259 } 1260 } 1261 else 1262 { 1263 // We were asked to parse the type for a method in a class, yet the 1264 // class hasn't been asked to complete itself through the 1265 // clang::ExternalASTSource protocol, so we need to just have the 1266 // class complete itself and do things the right way, then our 1267 // DIE should then have an entry in the dwarf->GetDIEToType() map. First 1268 // we need to modify the dwarf->GetDIEToType() so it doesn't think we are 1269 // trying to parse this DIE anymore... 1270 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1271 1272 // Now we get the full type to force our class type to complete itself 1273 // using the clang::ExternalASTSource protocol which will parse all 1274 // base classes and all methods (including the method for this DIE). 1275 class_type->GetFullCompilerType (); 1276 1277 // The type for this DIE should have been filled in the function call above 1278 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1279 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1280 { 1281 type_sp = type_ptr->shared_from_this(); 1282 break; 1283 } 1284 1285 // FIXME This is fixing some even uglier behavior but we really need to 1286 // uniq the methods of each class as well as the class itself. 1287 // <rdar://problem/11240464> 1288 type_handled = true; 1289 } 1290 } 1291 } 1292 } 1293 } 1294 } 1295 1296 if (!type_handled) 1297 { 1298 // We just have a function that isn't part of a class 1299 clang::FunctionDecl *function_decl = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx, 1300 type_name_cstr, 1301 clang_type, 1302 storage, 1303 is_inline); 1304 1305 // if (template_param_infos.GetSize() > 0) 1306 // { 1307 // clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx, 1308 // function_decl, 1309 // type_name_cstr, 1310 // template_param_infos); 1311 // 1312 // CreateFunctionTemplateSpecializationInfo (function_decl, 1313 // func_template_decl, 1314 // template_param_infos); 1315 // } 1316 // Add the decl to our DIE to decl context map 1317 assert (function_decl); 1318 LinkDeclContextToDIE(function_decl, die); 1319 if (!function_param_decls.empty()) 1320 m_ast.SetFunctionParameters (function_decl, 1321 &function_param_decls.front(), 1322 function_param_decls.size()); 1323 1324 ClangASTMetadata metadata; 1325 metadata.SetUserID(die.GetID()); 1326 1327 if (!object_pointer_name.empty()) 1328 { 1329 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1330 if (log) 1331 log->Printf ("Setting object pointer name: %s on function object %p.", 1332 object_pointer_name.c_str(), 1333 static_cast<void*>(function_decl)); 1334 } 1335 m_ast.SetMetadata (function_decl, metadata); 1336 } 1337 } 1338 type_sp.reset( new Type (die.GetID(), 1339 dwarf, 1340 type_name_const_str, 1341 0, 1342 NULL, 1343 LLDB_INVALID_UID, 1344 Type::eEncodingIsUID, 1345 &decl, 1346 clang_type, 1347 Type::eResolveStateFull)); 1348 assert(type_sp.get()); 1349 } 1350 break; 1351 1352 case DW_TAG_array_type: 1353 { 1354 // Set a bit that lets us know that we are currently parsing this 1355 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1356 1357 DWARFFormValue type_die_form; 1358 int64_t first_index = 0; 1359 uint32_t byte_stride = 0; 1360 uint32_t bit_stride = 0; 1361 bool is_vector = false; 1362 const size_t num_attributes = die.GetAttributes (attributes); 1363 1364 if (num_attributes > 0) 1365 { 1366 uint32_t i; 1367 for (i=0; i<num_attributes; ++i) 1368 { 1369 attr = attributes.AttributeAtIndex(i); 1370 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1371 { 1372 switch (attr) 1373 { 1374 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1375 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1376 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1377 case DW_AT_name: 1378 type_name_cstr = form_value.AsCString(); 1379 type_name_const_str.SetCString(type_name_cstr); 1380 break; 1381 1382 case DW_AT_type: type_die_form = form_value; break; 1383 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break; 1384 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break; 1385 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break; 1386 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break; 1387 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1388 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1389 case DW_AT_allocated: 1390 case DW_AT_associated: 1391 case DW_AT_data_location: 1392 case DW_AT_description: 1393 case DW_AT_ordering: 1394 case DW_AT_start_scope: 1395 case DW_AT_visibility: 1396 case DW_AT_specification: 1397 case DW_AT_abstract_origin: 1398 case DW_AT_sibling: 1399 break; 1400 } 1401 } 1402 } 1403 1404 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1405 1406 Type *element_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1407 1408 if (element_type) 1409 { 1410 std::vector<uint64_t> element_orders; 1411 ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride); 1412 if (byte_stride == 0 && bit_stride == 0) 1413 byte_stride = element_type->GetByteSize(); 1414 CompilerType array_element_type = element_type->GetForwardCompilerType (); 1415 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1416 if (element_orders.size() > 0) 1417 { 1418 uint64_t num_elements = 0; 1419 std::vector<uint64_t>::const_reverse_iterator pos; 1420 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend(); 1421 for (pos = element_orders.rbegin(); pos != end; ++pos) 1422 { 1423 num_elements = *pos; 1424 clang_type = m_ast.CreateArrayType (array_element_type, 1425 num_elements, 1426 is_vector); 1427 array_element_type = clang_type; 1428 array_element_bit_stride = num_elements ? 1429 array_element_bit_stride * num_elements : 1430 array_element_bit_stride; 1431 } 1432 } 1433 else 1434 { 1435 clang_type = m_ast.CreateArrayType (array_element_type, 0, is_vector); 1436 } 1437 ConstString empty_name; 1438 type_sp.reset( new Type (die.GetID(), 1439 dwarf, 1440 empty_name, 1441 array_element_bit_stride / 8, 1442 NULL, 1443 DIERef(type_die_form).GetUID(), 1444 Type::eEncodingIsUID, 1445 &decl, 1446 clang_type, 1447 Type::eResolveStateFull)); 1448 type_sp->SetEncodingType (element_type); 1449 } 1450 } 1451 } 1452 break; 1453 1454 case DW_TAG_ptr_to_member_type: 1455 { 1456 DWARFFormValue type_die_form; 1457 DWARFFormValue containing_type_die_form; 1458 1459 const size_t num_attributes = die.GetAttributes (attributes); 1460 1461 if (num_attributes > 0) { 1462 uint32_t i; 1463 for (i=0; i<num_attributes; ++i) 1464 { 1465 attr = attributes.AttributeAtIndex(i); 1466 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1467 { 1468 switch (attr) 1469 { 1470 case DW_AT_type: 1471 type_die_form = form_value; break; 1472 case DW_AT_containing_type: 1473 containing_type_die_form = form_value; break; 1474 } 1475 } 1476 } 1477 1478 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1479 Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form).GetUID()); 1480 1481 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType (); 1482 CompilerType class_clang_type = class_type->GetLayoutCompilerType (); 1483 1484 clang_type = ClangASTContext::CreateMemberPointerType(pointee_clang_type, class_clang_type); 1485 1486 byte_size = clang_type.GetByteSize(nullptr); 1487 1488 type_sp.reset( new Type (die.GetID(), 1489 dwarf, 1490 type_name_const_str, 1491 byte_size, 1492 NULL, 1493 LLDB_INVALID_UID, 1494 Type::eEncodingIsUID, 1495 NULL, 1496 clang_type, 1497 Type::eResolveStateForward)); 1498 } 1499 1500 break; 1501 } 1502 default: 1503 dwarf->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message", 1504 die.GetOffset(), 1505 tag, 1506 DW_TAG_value_to_name(tag)); 1507 break; 1508 } 1509 1510 if (type_sp.get()) 1511 { 1512 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1513 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1514 1515 SymbolContextScope * symbol_context_scope = NULL; 1516 if (sc_parent_tag == DW_TAG_compile_unit) 1517 { 1518 symbol_context_scope = sc.comp_unit; 1519 } 1520 else if (sc.function != NULL && sc_parent_die) 1521 { 1522 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1523 if (symbol_context_scope == NULL) 1524 symbol_context_scope = sc.function; 1525 } 1526 1527 if (symbol_context_scope != NULL) 1528 { 1529 type_sp->SetSymbolContextScope(symbol_context_scope); 1530 } 1531 1532 // We are ready to put this type into the uniqued list up at the module level 1533 type_list->Insert (type_sp); 1534 1535 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1536 } 1537 } 1538 else if (type_ptr != DIE_IS_BEING_PARSED) 1539 { 1540 type_sp = type_ptr->shared_from_this(); 1541 } 1542 } 1543 return type_sp; 1544 } 1545 1546 // DWARF parsing functions 1547 1548 class DWARFASTParserClang::DelayedAddObjCClassProperty 1549 { 1550 public: 1551 DelayedAddObjCClassProperty(const CompilerType &class_opaque_type, 1552 const char *property_name, 1553 const CompilerType &property_opaque_type, // The property type is only required if you don't have an ivar decl 1554 clang::ObjCIvarDecl *ivar_decl, 1555 const char *property_setter_name, 1556 const char *property_getter_name, 1557 uint32_t property_attributes, 1558 const ClangASTMetadata *metadata) : 1559 m_class_opaque_type (class_opaque_type), 1560 m_property_name (property_name), 1561 m_property_opaque_type (property_opaque_type), 1562 m_ivar_decl (ivar_decl), 1563 m_property_setter_name (property_setter_name), 1564 m_property_getter_name (property_getter_name), 1565 m_property_attributes (property_attributes) 1566 { 1567 if (metadata != NULL) 1568 { 1569 m_metadata_ap.reset(new ClangASTMetadata()); 1570 *m_metadata_ap = *metadata; 1571 } 1572 } 1573 1574 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs) 1575 { 1576 *this = rhs; 1577 } 1578 1579 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs) 1580 { 1581 m_class_opaque_type = rhs.m_class_opaque_type; 1582 m_property_name = rhs.m_property_name; 1583 m_property_opaque_type = rhs.m_property_opaque_type; 1584 m_ivar_decl = rhs.m_ivar_decl; 1585 m_property_setter_name = rhs.m_property_setter_name; 1586 m_property_getter_name = rhs.m_property_getter_name; 1587 m_property_attributes = rhs.m_property_attributes; 1588 1589 if (rhs.m_metadata_ap.get()) 1590 { 1591 m_metadata_ap.reset (new ClangASTMetadata()); 1592 *m_metadata_ap = *rhs.m_metadata_ap; 1593 } 1594 return *this; 1595 } 1596 1597 bool 1598 Finalize() 1599 { 1600 ClangASTContext *ast = llvm::cast<ClangASTContext>(m_class_opaque_type.GetTypeSystem()); 1601 return ast->AddObjCClassProperty (m_class_opaque_type, 1602 m_property_name, 1603 m_property_opaque_type, 1604 m_ivar_decl, 1605 m_property_setter_name, 1606 m_property_getter_name, 1607 m_property_attributes, 1608 m_metadata_ap.get()); 1609 } 1610 1611 private: 1612 CompilerType m_class_opaque_type; 1613 const char *m_property_name; 1614 CompilerType m_property_opaque_type; 1615 clang::ObjCIvarDecl *m_ivar_decl; 1616 const char *m_property_setter_name; 1617 const char *m_property_getter_name; 1618 uint32_t m_property_attributes; 1619 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1620 }; 1621 1622 bool 1623 DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &die, 1624 ClangASTContext::TemplateParameterInfos &template_param_infos) 1625 { 1626 const dw_tag_t tag = die.Tag(); 1627 1628 switch (tag) 1629 { 1630 case DW_TAG_template_type_parameter: 1631 case DW_TAG_template_value_parameter: 1632 { 1633 DWARFAttributes attributes; 1634 const size_t num_attributes = die.GetAttributes (attributes); 1635 const char *name = NULL; 1636 Type *lldb_type = NULL; 1637 CompilerType clang_type; 1638 uint64_t uval64 = 0; 1639 bool uval64_valid = false; 1640 if (num_attributes > 0) 1641 { 1642 DWARFFormValue form_value; 1643 for (size_t i=0; i<num_attributes; ++i) 1644 { 1645 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1646 1647 switch (attr) 1648 { 1649 case DW_AT_name: 1650 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1651 name = form_value.AsCString(); 1652 break; 1653 1654 case DW_AT_type: 1655 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1656 { 1657 lldb_type = die.ResolveTypeUID(DIERef(form_value).GetUID()); 1658 if (lldb_type) 1659 clang_type = lldb_type->GetForwardCompilerType (); 1660 } 1661 break; 1662 1663 case DW_AT_const_value: 1664 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1665 { 1666 uval64_valid = true; 1667 uval64 = form_value.Unsigned(); 1668 } 1669 break; 1670 default: 1671 break; 1672 } 1673 } 1674 1675 clang::ASTContext *ast = m_ast.getASTContext(); 1676 if (!clang_type) 1677 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1678 1679 if (clang_type) 1680 { 1681 bool is_signed = false; 1682 if (name && name[0]) 1683 template_param_infos.names.push_back(name); 1684 else 1685 template_param_infos.names.push_back(NULL); 1686 1687 if (tag == DW_TAG_template_value_parameter && 1688 lldb_type != NULL && 1689 clang_type.IsIntegerType (is_signed) && 1690 uval64_valid) 1691 { 1692 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed); 1693 template_param_infos.args.push_back (clang::TemplateArgument (*ast, 1694 llvm::APSInt(apint), 1695 ClangASTContext::GetQualType(clang_type))); 1696 } 1697 else 1698 { 1699 template_param_infos.args.push_back (clang::TemplateArgument (ClangASTContext::GetQualType(clang_type))); 1700 } 1701 } 1702 else 1703 { 1704 return false; 1705 } 1706 1707 } 1708 } 1709 return true; 1710 1711 default: 1712 break; 1713 } 1714 return false; 1715 } 1716 1717 bool 1718 DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die, 1719 ClangASTContext::TemplateParameterInfos &template_param_infos) 1720 { 1721 1722 if (!parent_die) 1723 return false; 1724 1725 Args template_parameter_names; 1726 for (DWARFDIE die = parent_die.GetFirstChild(); 1727 die.IsValid(); 1728 die = die.GetSibling()) 1729 { 1730 const dw_tag_t tag = die.Tag(); 1731 1732 switch (tag) 1733 { 1734 case DW_TAG_template_type_parameter: 1735 case DW_TAG_template_value_parameter: 1736 ParseTemplateDIE (die, template_param_infos); 1737 break; 1738 1739 default: 1740 break; 1741 } 1742 } 1743 if (template_param_infos.args.empty()) 1744 return false; 1745 return template_param_infos.args.size() == template_param_infos.names.size(); 1746 } 1747 1748 bool 1749 DWARFASTParserClang::CompleteTypeFromDWARF (const DWARFDIE &die, 1750 lldb_private::Type *type, 1751 CompilerType &clang_type) 1752 { 1753 // Disable external storage for this type so we don't get anymore 1754 // clang::ExternalASTSource queries for this type. 1755 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false); 1756 1757 if (!die) 1758 return false; 1759 1760 const dw_tag_t tag = die.Tag(); 1761 1762 SymbolFileDWARF *dwarf = die.GetDWARF(); 1763 1764 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 1765 if (log) 1766 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, 1767 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 1768 die.GetID(), 1769 die.GetTagAsCString(), 1770 type->GetName().AsCString()); 1771 assert (clang_type); 1772 DWARFAttributes attributes; 1773 switch (tag) 1774 { 1775 case DW_TAG_structure_type: 1776 case DW_TAG_union_type: 1777 case DW_TAG_class_type: 1778 { 1779 LayoutInfo layout_info; 1780 1781 { 1782 if (die.HasChildren()) 1783 { 1784 LanguageType class_language = eLanguageTypeUnknown; 1785 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) 1786 { 1787 class_language = eLanguageTypeObjC; 1788 // For objective C we don't start the definition when 1789 // the class is created. 1790 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1791 } 1792 1793 int tag_decl_kind = -1; 1794 AccessType default_accessibility = eAccessNone; 1795 if (tag == DW_TAG_structure_type) 1796 { 1797 tag_decl_kind = clang::TTK_Struct; 1798 default_accessibility = eAccessPublic; 1799 } 1800 else if (tag == DW_TAG_union_type) 1801 { 1802 tag_decl_kind = clang::TTK_Union; 1803 default_accessibility = eAccessPublic; 1804 } 1805 else if (tag == DW_TAG_class_type) 1806 { 1807 tag_decl_kind = clang::TTK_Class; 1808 default_accessibility = eAccessPrivate; 1809 } 1810 1811 SymbolContext sc(die.GetLLDBCompileUnit()); 1812 std::vector<clang::CXXBaseSpecifier *> base_classes; 1813 std::vector<int> member_accessibilities; 1814 bool is_a_class = false; 1815 // Parse members and base classes first 1816 DWARFDIECollection member_function_dies; 1817 1818 DelayedPropertyList delayed_properties; 1819 if (!ParseChildMembers (sc, 1820 die, 1821 clang_type, 1822 class_language, 1823 base_classes, 1824 member_accessibilities, 1825 member_function_dies, 1826 delayed_properties, 1827 default_accessibility, 1828 is_a_class, 1829 layout_info)) 1830 { 1831 auto module = dwarf->GetObjectFile()->GetModule(); 1832 module->ReportError (":: Class %s has members with incomplete type.", die.GetName()); 1833 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 1834 module->ReportError(":: Try compiling the source file with -fno-limit-debug-info."); 1835 1836 return false; 1837 } 1838 1839 // Now parse any methods if there were any... 1840 size_t num_functions = member_function_dies.Size(); 1841 if (num_functions > 0) 1842 { 1843 for (size_t i=0; i<num_functions; ++i) 1844 { 1845 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 1846 } 1847 } 1848 1849 if (class_language == eLanguageTypeObjC) 1850 { 1851 ConstString class_name (clang_type.GetTypeName()); 1852 if (class_name) 1853 { 1854 DIEArray method_die_offsets; 1855 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 1856 1857 if (!method_die_offsets.empty()) 1858 { 1859 DWARFDebugInfo* debug_info = dwarf->DebugInfo(); 1860 1861 const size_t num_matches = method_die_offsets.size(); 1862 for (size_t i=0; i<num_matches; ++i) 1863 { 1864 const DIERef& die_ref = method_die_offsets[i]; 1865 DWARFDIE method_die = debug_info->GetDIE (die_ref); 1866 1867 if (method_die) 1868 method_die.ResolveType (); 1869 } 1870 } 1871 1872 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end(); 1873 pi != pe; 1874 ++pi) 1875 pi->Finalize(); 1876 } 1877 } 1878 1879 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 1880 // need to tell the clang type it is actually a class. 1881 if (class_language != eLanguageTypeObjC) 1882 { 1883 if (is_a_class && tag_decl_kind != clang::TTK_Class) 1884 m_ast.SetTagTypeKind (ClangASTContext::GetQualType(clang_type), clang::TTK_Class); 1885 } 1886 1887 // Since DW_TAG_structure_type gets used for both classes 1888 // and structures, we may need to set any DW_TAG_member 1889 // fields to have a "private" access if none was specified. 1890 // When we parsed the child members we tracked that actual 1891 // accessibility value for each DW_TAG_member in the 1892 // "member_accessibilities" array. If the value for the 1893 // member is zero, then it was set to the "default_accessibility" 1894 // which for structs was "public". Below we correct this 1895 // by setting any fields to "private" that weren't correctly 1896 // set. 1897 if (is_a_class && !member_accessibilities.empty()) 1898 { 1899 // This is a class and all members that didn't have 1900 // their access specified are private. 1901 m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type), 1902 eAccessPrivate, 1903 &member_accessibilities.front(), 1904 member_accessibilities.size()); 1905 } 1906 1907 if (!base_classes.empty()) 1908 { 1909 // Make sure all base classes refer to complete types and not 1910 // forward declarations. If we don't do this, clang will crash 1911 // with an assertion in the call to clang_type.SetBaseClassesForClassType() 1912 for (auto &base_class : base_classes) 1913 { 1914 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo(); 1915 if (type_source_info) 1916 { 1917 CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr()); 1918 if (base_class_type.GetCompleteType() == false) 1919 { 1920 auto module = dwarf->GetObjectFile()->GetModule(); 1921 module->ReportError ( 1922 ":: Class '%s' has a base class '%s' which does not have a complete definition.", 1923 die.GetName(), 1924 base_class_type.GetTypeName().GetCString()); 1925 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 1926 module->ReportError (":: Try compiling the source file with -fno-limit-debug-info."); 1927 1928 return false; 1929 } 1930 } 1931 } 1932 m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(), 1933 &base_classes.front(), 1934 base_classes.size()); 1935 1936 // Clang will copy each CXXBaseSpecifier in "base_classes" 1937 // so we have to free them all. 1938 ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(), 1939 base_classes.size()); 1940 } 1941 } 1942 } 1943 1944 ClangASTContext::BuildIndirectFields (clang_type); 1945 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 1946 1947 if (!layout_info.field_offsets.empty() || 1948 !layout_info.base_offsets.empty() || 1949 !layout_info.vbase_offsets.empty() ) 1950 { 1951 if (type) 1952 layout_info.bit_size = type->GetByteSize() * 8; 1953 if (layout_info.bit_size == 0) 1954 layout_info.bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 1955 1956 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1957 if (record_decl) 1958 { 1959 if (log) 1960 { 1961 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 1962 1963 if (module_sp) 1964 { 1965 module_sp->LogMessage (log, 1966 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 1967 static_cast<void*>(clang_type.GetOpaqueQualType()), 1968 static_cast<void*>(record_decl), 1969 layout_info.bit_size, 1970 layout_info.alignment, 1971 static_cast<uint32_t>(layout_info.field_offsets.size()), 1972 static_cast<uint32_t>(layout_info.base_offsets.size()), 1973 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 1974 1975 uint32_t idx; 1976 { 1977 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos, 1978 end = layout_info.field_offsets.end(); 1979 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx) 1980 { 1981 module_sp->LogMessage(log, 1982 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }", 1983 static_cast<void *>(clang_type.GetOpaqueQualType()), 1984 idx, 1985 static_cast<uint32_t>(pos->second), 1986 pos->first->getNameAsString().c_str()); 1987 } 1988 } 1989 1990 { 1991 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, 1992 base_end = layout_info.base_offsets.end(); 1993 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx) 1994 { 1995 module_sp->LogMessage(log, 1996 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }", 1997 clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(), 1998 base_pos->first->getNameAsString().c_str()); 1999 } 2000 } 2001 { 2002 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, 2003 vbase_end = layout_info.vbase_offsets.end(); 2004 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx) 2005 { 2006 module_sp->LogMessage(log, 2007 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }", 2008 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2009 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2010 vbase_pos->first->getNameAsString().c_str()); 2011 } 2012 } 2013 2014 } 2015 } 2016 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info)); 2017 } 2018 } 2019 } 2020 2021 return (bool)clang_type; 2022 2023 case DW_TAG_enumeration_type: 2024 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2025 if (die.HasChildren()) 2026 { 2027 SymbolContext sc(die.GetLLDBCompileUnit()); 2028 bool is_signed = false; 2029 clang_type.IsIntegerType(is_signed); 2030 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die); 2031 } 2032 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2033 return (bool)clang_type; 2034 2035 default: 2036 assert(false && "not a forward clang type decl!"); 2037 break; 2038 } 2039 2040 return false; 2041 } 2042 2043 std::vector<DWARFDIE> 2044 DWARFASTParserClang::GetDIEForDeclContext (lldb_private::CompilerDeclContext decl_context) 2045 { 2046 std::vector<DWARFDIE> result; 2047 for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++) 2048 result.push_back(it->second); 2049 return result; 2050 } 2051 2052 CompilerDecl 2053 DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die) 2054 { 2055 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2056 if (clang_decl != nullptr) 2057 return CompilerDecl(&m_ast, clang_decl); 2058 return CompilerDecl(); 2059 } 2060 2061 CompilerDeclContext 2062 DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die) 2063 { 2064 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die); 2065 if (clang_decl_ctx) 2066 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2067 return CompilerDeclContext(); 2068 } 2069 2070 CompilerDeclContext 2071 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die) 2072 { 2073 clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 2074 if (clang_decl_ctx) 2075 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2076 return CompilerDeclContext(); 2077 } 2078 2079 size_t 2080 DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc, 2081 lldb_private::CompilerType &clang_type, 2082 bool is_signed, 2083 uint32_t enumerator_byte_size, 2084 const DWARFDIE &parent_die) 2085 { 2086 if (!parent_die) 2087 return 0; 2088 2089 size_t enumerators_added = 0; 2090 2091 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2092 { 2093 const dw_tag_t tag = die.Tag(); 2094 if (tag == DW_TAG_enumerator) 2095 { 2096 DWARFAttributes attributes; 2097 const size_t num_child_attributes = die.GetAttributes(attributes); 2098 if (num_child_attributes > 0) 2099 { 2100 const char *name = NULL; 2101 bool got_value = false; 2102 int64_t enum_value = 0; 2103 Declaration decl; 2104 2105 uint32_t i; 2106 for (i=0; i<num_child_attributes; ++i) 2107 { 2108 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2109 DWARFFormValue form_value; 2110 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2111 { 2112 switch (attr) 2113 { 2114 case DW_AT_const_value: 2115 got_value = true; 2116 if (is_signed) 2117 enum_value = form_value.Signed(); 2118 else 2119 enum_value = form_value.Unsigned(); 2120 break; 2121 2122 case DW_AT_name: 2123 name = form_value.AsCString(); 2124 break; 2125 2126 case DW_AT_description: 2127 default: 2128 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2129 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2130 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2131 case DW_AT_sibling: 2132 break; 2133 } 2134 } 2135 } 2136 2137 if (name && name[0] && got_value) 2138 { 2139 m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(), 2140 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2141 decl, 2142 name, 2143 enum_value, 2144 enumerator_byte_size * 8); 2145 ++enumerators_added; 2146 } 2147 } 2148 } 2149 } 2150 return enumerators_added; 2151 } 2152 2153 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2154 2155 class DIEStack 2156 { 2157 public: 2158 2159 void Push (const DWARFDIE &die) 2160 { 2161 m_dies.push_back (die); 2162 } 2163 2164 2165 void LogDIEs (Log *log) 2166 { 2167 StreamString log_strm; 2168 const size_t n = m_dies.size(); 2169 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2170 for (size_t i=0; i<n; i++) 2171 { 2172 std::string qualified_name; 2173 const DWARFDIE &die = m_dies[i]; 2174 die.GetQualifiedName(qualified_name); 2175 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", 2176 (uint64_t)i, 2177 die.GetOffset(), 2178 die.GetTagAsCString(), 2179 qualified_name.c_str()); 2180 } 2181 log->PutCString(log_strm.GetData()); 2182 } 2183 void Pop () 2184 { 2185 m_dies.pop_back(); 2186 } 2187 2188 class ScopedPopper 2189 { 2190 public: 2191 ScopedPopper (DIEStack &die_stack) : 2192 m_die_stack (die_stack), 2193 m_valid (false) 2194 { 2195 } 2196 2197 void 2198 Push (const DWARFDIE &die) 2199 { 2200 m_valid = true; 2201 m_die_stack.Push (die); 2202 } 2203 2204 ~ScopedPopper () 2205 { 2206 if (m_valid) 2207 m_die_stack.Pop(); 2208 } 2209 2210 2211 2212 protected: 2213 DIEStack &m_die_stack; 2214 bool m_valid; 2215 }; 2216 2217 protected: 2218 typedef std::vector<DWARFDIE> Stack; 2219 Stack m_dies; 2220 }; 2221 #endif 2222 2223 Function * 2224 DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc, 2225 const DWARFDIE &die) 2226 { 2227 DWARFRangeList func_ranges; 2228 const char *name = NULL; 2229 const char *mangled = NULL; 2230 int decl_file = 0; 2231 int decl_line = 0; 2232 int decl_column = 0; 2233 int call_file = 0; 2234 int call_line = 0; 2235 int call_column = 0; 2236 DWARFExpression frame_base(die.GetCU()); 2237 2238 const dw_tag_t tag = die.Tag(); 2239 2240 if (tag != DW_TAG_subprogram) 2241 return NULL; 2242 2243 if (die.GetDIENamesAndRanges (name, 2244 mangled, 2245 func_ranges, 2246 decl_file, 2247 decl_line, 2248 decl_column, 2249 call_file, 2250 call_line, 2251 call_column, 2252 &frame_base)) 2253 { 2254 2255 // Union of all ranges in the function DIE (if the function is discontiguous) 2256 AddressRange func_range; 2257 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0); 2258 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0); 2259 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr) 2260 { 2261 ModuleSP module_sp (die.GetModule()); 2262 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList()); 2263 if (func_range.GetBaseAddress().IsValid()) 2264 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2265 } 2266 2267 if (func_range.GetBaseAddress().IsValid()) 2268 { 2269 Mangled func_name; 2270 if (mangled) 2271 func_name.SetValue(ConstString(mangled), true); 2272 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2273 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2274 name && strcmp(name, "main") != 0) 2275 { 2276 // If the mangled name is not present in the DWARF, generate the demangled name 2277 // using the decl context. We skip if the function is "main" as its name is 2278 // never mangled. 2279 bool is_static = false; 2280 bool is_variadic = false; 2281 unsigned type_quals = 0; 2282 std::vector<CompilerType> param_types; 2283 std::vector<clang::ParmVarDecl*> param_decls; 2284 DWARFDeclContext decl_ctx; 2285 StreamString sstr; 2286 2287 die.GetDWARFDeclContext(decl_ctx); 2288 sstr << decl_ctx.GetQualifiedName(); 2289 2290 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr); 2291 ParseChildParameters(sc, 2292 containing_decl_ctx, 2293 die, 2294 true, 2295 is_static, 2296 is_variadic, 2297 param_types, 2298 param_decls, 2299 type_quals); 2300 sstr << "("; 2301 for (size_t i = 0; i < param_types.size(); i++) 2302 { 2303 if (i > 0) 2304 sstr << ", "; 2305 sstr << param_types[i].GetTypeName(); 2306 } 2307 if (is_variadic) 2308 sstr << ", ..."; 2309 sstr << ")"; 2310 if (type_quals & clang::Qualifiers::Const) 2311 sstr << " const"; 2312 2313 func_name.SetValue(ConstString(sstr.GetData()), false); 2314 } 2315 else 2316 func_name.SetValue(ConstString(name), false); 2317 2318 FunctionSP func_sp; 2319 std::unique_ptr<Declaration> decl_ap; 2320 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2321 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2322 decl_line, 2323 decl_column)); 2324 2325 SymbolFileDWARF *dwarf = die.GetDWARF(); 2326 // Supply the type _only_ if it has already been parsed 2327 Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE()); 2328 2329 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2330 2331 if (dwarf->FixupAddress (func_range.GetBaseAddress())) 2332 { 2333 const user_id_t func_user_id = die.GetID(); 2334 func_sp.reset(new Function (sc.comp_unit, 2335 func_user_id, // UserID is the DIE offset 2336 func_user_id, 2337 func_name, 2338 func_type, 2339 func_range)); // first address range 2340 2341 if (func_sp.get() != NULL) 2342 { 2343 if (frame_base.IsValid()) 2344 func_sp->GetFrameBaseExpression() = frame_base; 2345 sc.comp_unit->AddFunction(func_sp); 2346 return func_sp.get(); 2347 } 2348 } 2349 } 2350 } 2351 return NULL; 2352 } 2353 2354 2355 bool 2356 DWARFASTParserClang::ParseChildMembers (const SymbolContext& sc, 2357 const DWARFDIE &parent_die, 2358 CompilerType &class_clang_type, 2359 const LanguageType class_language, 2360 std::vector<clang::CXXBaseSpecifier *>& base_classes, 2361 std::vector<int>& member_accessibilities, 2362 DWARFDIECollection& member_function_dies, 2363 DelayedPropertyList& delayed_properties, 2364 AccessType& default_accessibility, 2365 bool &is_a_class, 2366 LayoutInfo &layout_info) 2367 { 2368 if (!parent_die) 2369 return 0; 2370 2371 uint32_t incomplete_member_info_count = 0; 2372 uint32_t member_idx = 0; 2373 BitfieldInfo last_field_info; 2374 2375 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2376 ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2377 if (ast == nullptr) 2378 return 0; 2379 2380 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2381 { 2382 dw_tag_t tag = die.Tag(); 2383 2384 switch (tag) 2385 { 2386 case DW_TAG_member: 2387 case DW_TAG_APPLE_property: 2388 { 2389 DWARFAttributes attributes; 2390 const size_t num_attributes = die.GetAttributes (attributes); 2391 if (num_attributes > 0) 2392 { 2393 Declaration decl; 2394 //DWARFExpression location; 2395 const char *name = NULL; 2396 const char *prop_name = NULL; 2397 const char *prop_getter_name = NULL; 2398 const char *prop_setter_name = NULL; 2399 uint32_t prop_attributes = 0; 2400 2401 2402 bool is_artificial = false; 2403 DWARFFormValue encoding_form; 2404 AccessType accessibility = eAccessNone; 2405 uint32_t member_byte_offset = UINT32_MAX; 2406 size_t byte_size = 0; 2407 size_t bit_offset = 0; 2408 size_t bit_size = 0; 2409 bool is_external = false; // On DW_TAG_members, this means the member is static 2410 uint32_t i; 2411 for (i=0; i<num_attributes && !is_artificial; ++i) 2412 { 2413 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2414 DWARFFormValue form_value; 2415 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2416 { 2417 switch (attr) 2418 { 2419 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2420 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2421 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2422 case DW_AT_name: name = form_value.AsCString(); break; 2423 case DW_AT_type: encoding_form = form_value; break; 2424 case DW_AT_bit_offset: bit_offset = form_value.Unsigned(); break; 2425 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break; 2426 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 2427 case DW_AT_data_member_location: 2428 if (form_value.BlockData()) 2429 { 2430 Value initialValue(0); 2431 Value memberOffset(0); 2432 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2433 uint32_t block_length = form_value.Unsigned(); 2434 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2435 if (DWARFExpression::Evaluate(NULL, // ExecutionContext * 2436 NULL, // ClangExpressionVariableList * 2437 NULL, // ClangExpressionDeclMap * 2438 NULL, // RegisterContext * 2439 module_sp, 2440 debug_info_data, 2441 die.GetCU(), 2442 block_offset, 2443 block_length, 2444 eRegisterKindDWARF, 2445 &initialValue, 2446 memberOffset, 2447 NULL)) 2448 { 2449 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2450 } 2451 } 2452 else 2453 { 2454 // With DWARF 3 and later, if the value is an integer constant, 2455 // this form value is the offset in bytes from the beginning 2456 // of the containing entity. 2457 member_byte_offset = form_value.Unsigned(); 2458 } 2459 break; 2460 2461 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break; 2462 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2463 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(); 2464 break; 2465 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(); 2466 break; 2467 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(); 2468 break; 2469 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break; 2470 case DW_AT_external: is_external = form_value.Boolean(); break; 2471 2472 default: 2473 case DW_AT_declaration: 2474 case DW_AT_description: 2475 case DW_AT_mutable: 2476 case DW_AT_visibility: 2477 case DW_AT_sibling: 2478 break; 2479 } 2480 } 2481 } 2482 2483 if (prop_name) 2484 { 2485 ConstString fixed_getter; 2486 ConstString fixed_setter; 2487 2488 // Check if the property getter/setter were provided as full 2489 // names. We want basenames, so we extract them. 2490 2491 if (prop_getter_name && prop_getter_name[0] == '-') 2492 { 2493 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2494 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2495 } 2496 2497 if (prop_setter_name && prop_setter_name[0] == '-') 2498 { 2499 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2500 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2501 } 2502 2503 // If the names haven't been provided, they need to be 2504 // filled in. 2505 2506 if (!prop_getter_name) 2507 { 2508 prop_getter_name = prop_name; 2509 } 2510 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly)) 2511 { 2512 StreamString ss; 2513 2514 ss.Printf("set%c%s:", 2515 toupper(prop_name[0]), 2516 &prop_name[1]); 2517 2518 fixed_setter.SetCString(ss.GetData()); 2519 prop_setter_name = fixed_setter.GetCString(); 2520 } 2521 } 2522 2523 // Clang has a DWARF generation bug where sometimes it 2524 // represents fields that are references with bad byte size 2525 // and bit size/offset information such as: 2526 // 2527 // DW_AT_byte_size( 0x00 ) 2528 // DW_AT_bit_size( 0x40 ) 2529 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2530 // 2531 // So check the bit offset to make sure it is sane, and if 2532 // the values are not sane, remove them. If we don't do this 2533 // then we will end up with a crash if we try to use this 2534 // type in an expression when clang becomes unhappy with its 2535 // recycled debug info. 2536 2537 if (bit_offset > 128) 2538 { 2539 bit_size = 0; 2540 bit_offset = 0; 2541 } 2542 2543 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2544 if (class_language == eLanguageTypeObjC || 2545 class_language == eLanguageTypeObjC_plus_plus) 2546 accessibility = eAccessNone; 2547 2548 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name)) 2549 { 2550 // Not all compilers will mark the vtable pointer 2551 // member as artificial (llvm-gcc). We can't have 2552 // the virtual members in our classes otherwise it 2553 // throws off all child offsets since we end up 2554 // having and extra pointer sized member in our 2555 // class layouts. 2556 is_artificial = true; 2557 } 2558 2559 // Handle static members 2560 if (is_external && member_byte_offset == UINT32_MAX) 2561 { 2562 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2563 2564 if (var_type) 2565 { 2566 if (accessibility == eAccessNone) 2567 accessibility = eAccessPublic; 2568 ClangASTContext::AddVariableToRecordType (class_clang_type, 2569 name, 2570 var_type->GetLayoutCompilerType (), 2571 accessibility); 2572 } 2573 break; 2574 } 2575 2576 if (is_artificial == false) 2577 { 2578 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2579 2580 clang::FieldDecl *field_decl = NULL; 2581 if (tag == DW_TAG_member) 2582 { 2583 if (member_type) 2584 { 2585 if (accessibility == eAccessNone) 2586 accessibility = default_accessibility; 2587 member_accessibilities.push_back(accessibility); 2588 2589 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2590 if (bit_size > 0) 2591 { 2592 2593 BitfieldInfo this_field_info; 2594 this_field_info.bit_offset = field_bit_offset; 2595 this_field_info.bit_size = bit_size; 2596 2597 ///////////////////////////////////////////////////////////// 2598 // How to locate a field given the DWARF debug information 2599 // 2600 // AT_byte_size indicates the size of the word in which the 2601 // bit offset must be interpreted. 2602 // 2603 // AT_data_member_location indicates the byte offset of the 2604 // word from the base address of the structure. 2605 // 2606 // AT_bit_offset indicates how many bits into the word 2607 // (according to the host endianness) the low-order bit of 2608 // the field starts. AT_bit_offset can be negative. 2609 // 2610 // AT_bit_size indicates the size of the field in bits. 2611 ///////////////////////////////////////////////////////////// 2612 2613 if (byte_size == 0) 2614 byte_size = member_type->GetByteSize(); 2615 2616 if (die.GetDWARF()->GetObjectFile()->GetByteOrder() == eByteOrderLittle) 2617 { 2618 this_field_info.bit_offset += byte_size * 8; 2619 this_field_info.bit_offset -= (bit_offset + bit_size); 2620 } 2621 else 2622 { 2623 this_field_info.bit_offset += bit_offset; 2624 } 2625 2626 // Update the field bit offset we will report for layout 2627 field_bit_offset = this_field_info.bit_offset; 2628 2629 // If the member to be emitted did not start on a character boundary and there is 2630 // empty space between the last field and this one, then we need to emit an 2631 // anonymous member filling up the space up to its start. There are three cases 2632 // here: 2633 // 2634 // 1 If the previous member ended on a character boundary, then we can emit an 2635 // anonymous member starting at the most recent character boundary. 2636 // 2637 // 2 If the previous member did not end on a character boundary and the distance 2638 // from the end of the previous member to the current member is less than a 2639 // word width, then we can emit an anonymous member starting right after the 2640 // previous member and right before this member. 2641 // 2642 // 3 If the previous member did not end on a character boundary and the distance 2643 // from the end of the previous member to the current member is greater than 2644 // or equal a word width, then we act as in Case 1. 2645 2646 const uint64_t character_width = 8; 2647 const uint64_t word_width = 32; 2648 2649 // Objective-C has invalid DW_AT_bit_offset values in older versions 2650 // of clang, so we have to be careful and only insert unnamed bitfields 2651 // if we have a new enough clang. 2652 bool detect_unnamed_bitfields = true; 2653 2654 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus) 2655 detect_unnamed_bitfields = die.GetCU()->Supports_unnamed_objc_bitfields (); 2656 2657 if (detect_unnamed_bitfields) 2658 { 2659 BitfieldInfo anon_field_info; 2660 2661 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned 2662 { 2663 uint64_t last_field_end = 0; 2664 2665 if (last_field_info.IsValid()) 2666 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2667 2668 if (this_field_info.bit_offset != last_field_end) 2669 { 2670 if (((last_field_end % character_width) == 0) || // case 1 2671 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3 2672 { 2673 anon_field_info.bit_size = this_field_info.bit_offset % character_width; 2674 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size; 2675 } 2676 else // case 2 2677 { 2678 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end; 2679 anon_field_info.bit_offset = last_field_end; 2680 } 2681 } 2682 } 2683 2684 if (anon_field_info.IsValid()) 2685 { 2686 clang::FieldDecl *unnamed_bitfield_decl = 2687 ClangASTContext::AddFieldToRecordType (class_clang_type, 2688 NULL, 2689 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width), 2690 accessibility, 2691 anon_field_info.bit_size); 2692 2693 layout_info.field_offsets.insert( 2694 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset)); 2695 } 2696 } 2697 last_field_info = this_field_info; 2698 } 2699 else 2700 { 2701 last_field_info.Clear(); 2702 } 2703 2704 CompilerType member_clang_type = member_type->GetLayoutCompilerType (); 2705 if (!member_clang_type.IsCompleteType() && !member_clang_type.GetCompleteType()) 2706 incomplete_member_info_count += 1; 2707 2708 { 2709 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>). 2710 // If the current field is at the end of the structure, then there is definitely no room for extra 2711 // elements and we override the type to array[0]. 2712 2713 CompilerType member_array_element_type; 2714 uint64_t member_array_size; 2715 bool member_array_is_incomplete; 2716 2717 if (member_clang_type.IsArrayType(&member_array_element_type, 2718 &member_array_size, 2719 &member_array_is_incomplete) && 2720 !member_array_is_incomplete) 2721 { 2722 uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2723 2724 if (member_byte_offset >= parent_byte_size) 2725 { 2726 if (member_array_size != 1) 2727 { 2728 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64, 2729 die.GetID(), 2730 name, 2731 encoding_form.Reference(), 2732 parent_die.GetID()); 2733 } 2734 2735 member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false); 2736 } 2737 } 2738 } 2739 2740 field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type, 2741 name, 2742 member_clang_type, 2743 accessibility, 2744 bit_size); 2745 2746 m_ast.SetMetadataAsUserID (field_decl, die.GetID()); 2747 2748 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset)); 2749 } 2750 else 2751 { 2752 if (name) 2753 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 2754 die.GetID(), 2755 name, 2756 encoding_form.Reference()); 2757 else 2758 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 2759 die.GetID(), 2760 encoding_form.Reference()); 2761 } 2762 } 2763 2764 if (prop_name != NULL && member_type) 2765 { 2766 clang::ObjCIvarDecl *ivar_decl = NULL; 2767 2768 if (field_decl) 2769 { 2770 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 2771 assert (ivar_decl != NULL); 2772 } 2773 2774 ClangASTMetadata metadata; 2775 metadata.SetUserID (die.GetID()); 2776 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type, 2777 prop_name, 2778 member_type->GetLayoutCompilerType (), 2779 ivar_decl, 2780 prop_setter_name, 2781 prop_getter_name, 2782 prop_attributes, 2783 &metadata)); 2784 2785 if (ivar_decl) 2786 m_ast.SetMetadataAsUserID (ivar_decl, die.GetID()); 2787 } 2788 } 2789 } 2790 ++member_idx; 2791 } 2792 break; 2793 2794 case DW_TAG_subprogram: 2795 // Let the type parsing code handle this one for us. 2796 member_function_dies.Append (die); 2797 break; 2798 2799 case DW_TAG_inheritance: 2800 { 2801 is_a_class = true; 2802 if (default_accessibility == eAccessNone) 2803 default_accessibility = eAccessPrivate; 2804 // TODO: implement DW_TAG_inheritance type parsing 2805 DWARFAttributes attributes; 2806 const size_t num_attributes = die.GetAttributes (attributes); 2807 if (num_attributes > 0) 2808 { 2809 Declaration decl; 2810 DWARFExpression location(die.GetCU()); 2811 DWARFFormValue encoding_form; 2812 AccessType accessibility = default_accessibility; 2813 bool is_virtual = false; 2814 bool is_base_of_class = true; 2815 off_t member_byte_offset = 0; 2816 uint32_t i; 2817 for (i=0; i<num_attributes; ++i) 2818 { 2819 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2820 DWARFFormValue form_value; 2821 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2822 { 2823 switch (attr) 2824 { 2825 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2826 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2827 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2828 case DW_AT_type: encoding_form = form_value; break; 2829 case DW_AT_data_member_location: 2830 if (form_value.BlockData()) 2831 { 2832 Value initialValue(0); 2833 Value memberOffset(0); 2834 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2835 uint32_t block_length = form_value.Unsigned(); 2836 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2837 if (DWARFExpression::Evaluate (NULL, 2838 NULL, 2839 NULL, 2840 NULL, 2841 module_sp, 2842 debug_info_data, 2843 die.GetCU(), 2844 block_offset, 2845 block_length, 2846 eRegisterKindDWARF, 2847 &initialValue, 2848 memberOffset, 2849 NULL)) 2850 { 2851 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2852 } 2853 } 2854 else 2855 { 2856 // With DWARF 3 and later, if the value is an integer constant, 2857 // this form value is the offset in bytes from the beginning 2858 // of the containing entity. 2859 member_byte_offset = form_value.Unsigned(); 2860 } 2861 break; 2862 2863 case DW_AT_accessibility: 2864 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2865 break; 2866 2867 case DW_AT_virtuality: 2868 is_virtual = form_value.Boolean(); 2869 break; 2870 2871 case DW_AT_sibling: 2872 break; 2873 2874 default: 2875 break; 2876 } 2877 } 2878 } 2879 2880 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2881 if (base_class_type == NULL) 2882 { 2883 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to resolve the base class at 0x%8.8" PRIx64 " from enclosing type 0x%8.8x. \nPlease file a bug and attach the file at the start of this error message", 2884 die.GetOffset(), 2885 encoding_form.Reference(), 2886 parent_die.GetOffset()); 2887 break; 2888 } 2889 2890 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType (); 2891 assert (base_class_clang_type); 2892 if (class_language == eLanguageTypeObjC) 2893 { 2894 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 2895 } 2896 else 2897 { 2898 base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(), 2899 accessibility, 2900 is_virtual, 2901 is_base_of_class)); 2902 2903 if (is_virtual) 2904 { 2905 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't 2906 // give us a constant offset, but gives us a DWARF expressions that requires an actual object 2907 // in memory. the DW_AT_data_member_location for a virtual base class looks like: 2908 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus ) 2909 // Given this, there is really no valid response we can give to clang for virtual base 2910 // class offsets, and this should eventually be removed from LayoutRecordType() in the external 2911 // AST source in clang. 2912 } 2913 else 2914 { 2915 layout_info.base_offsets.insert( 2916 std::make_pair(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 2917 clang::CharUnits::fromQuantity(member_byte_offset))); 2918 } 2919 } 2920 } 2921 } 2922 break; 2923 2924 default: 2925 break; 2926 } 2927 } 2928 2929 return incomplete_member_info_count == 0; 2930 } 2931 2932 2933 size_t 2934 DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc, 2935 clang::DeclContext *containing_decl_ctx, 2936 const DWARFDIE &parent_die, 2937 bool skip_artificial, 2938 bool &is_static, 2939 bool &is_variadic, 2940 std::vector<CompilerType>& function_param_types, 2941 std::vector<clang::ParmVarDecl*>& function_param_decls, 2942 unsigned &type_quals) 2943 { 2944 if (!parent_die) 2945 return 0; 2946 2947 size_t arg_idx = 0; 2948 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2949 { 2950 const dw_tag_t tag = die.Tag(); 2951 switch (tag) 2952 { 2953 case DW_TAG_formal_parameter: 2954 { 2955 DWARFAttributes attributes; 2956 const size_t num_attributes = die.GetAttributes(attributes); 2957 if (num_attributes > 0) 2958 { 2959 const char *name = NULL; 2960 Declaration decl; 2961 DWARFFormValue param_type_die_form; 2962 bool is_artificial = false; 2963 // one of None, Auto, Register, Extern, Static, PrivateExtern 2964 2965 clang::StorageClass storage = clang::SC_None; 2966 uint32_t i; 2967 for (i=0; i<num_attributes; ++i) 2968 { 2969 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2970 DWARFFormValue form_value; 2971 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2972 { 2973 switch (attr) 2974 { 2975 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2976 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2977 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2978 case DW_AT_name: name = form_value.AsCString(); 2979 break; 2980 case DW_AT_type: param_type_die_form = form_value; break; 2981 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2982 case DW_AT_location: 2983 // if (form_value.BlockData()) 2984 // { 2985 // const DWARFDataExtractor& debug_info_data = debug_info(); 2986 // uint32_t block_length = form_value.Unsigned(); 2987 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length); 2988 // } 2989 // else 2990 // { 2991 // } 2992 // break; 2993 case DW_AT_const_value: 2994 case DW_AT_default_value: 2995 case DW_AT_description: 2996 case DW_AT_endianity: 2997 case DW_AT_is_optional: 2998 case DW_AT_segment: 2999 case DW_AT_variable_parameter: 3000 default: 3001 case DW_AT_abstract_origin: 3002 case DW_AT_sibling: 3003 break; 3004 } 3005 } 3006 } 3007 3008 bool skip = false; 3009 if (skip_artificial) 3010 { 3011 if (is_artificial) 3012 { 3013 // In order to determine if a C++ member function is 3014 // "const" we have to look at the const-ness of "this"... 3015 // Ugly, but that 3016 if (arg_idx == 0) 3017 { 3018 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) 3019 { 3020 // Often times compilers omit the "this" name for the 3021 // specification DIEs, so we can't rely upon the name 3022 // being in the formal parameter DIE... 3023 if (name == NULL || ::strcmp(name, "this")==0) 3024 { 3025 Type *this_type = die.ResolveTypeUID (DIERef(param_type_die_form).GetUID()); 3026 if (this_type) 3027 { 3028 uint32_t encoding_mask = this_type->GetEncodingMask(); 3029 if (encoding_mask & Type::eEncodingIsPointerUID) 3030 { 3031 is_static = false; 3032 3033 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3034 type_quals |= clang::Qualifiers::Const; 3035 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3036 type_quals |= clang::Qualifiers::Volatile; 3037 } 3038 } 3039 } 3040 } 3041 } 3042 skip = true; 3043 } 3044 else 3045 { 3046 3047 // HACK: Objective C formal parameters "self" and "_cmd" 3048 // are not marked as artificial in the DWARF... 3049 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3050 if (comp_unit) 3051 { 3052 switch (comp_unit->GetLanguage()) 3053 { 3054 case eLanguageTypeObjC: 3055 case eLanguageTypeObjC_plus_plus: 3056 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0)) 3057 skip = true; 3058 break; 3059 default: 3060 break; 3061 } 3062 } 3063 } 3064 } 3065 3066 if (!skip) 3067 { 3068 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form).GetUID()); 3069 if (type) 3070 { 3071 function_param_types.push_back (type->GetForwardCompilerType ()); 3072 3073 clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name, 3074 type->GetForwardCompilerType (), 3075 storage); 3076 assert(param_var_decl); 3077 function_param_decls.push_back(param_var_decl); 3078 3079 m_ast.SetMetadataAsUserID (param_var_decl, die.GetID()); 3080 } 3081 } 3082 } 3083 arg_idx++; 3084 } 3085 break; 3086 3087 case DW_TAG_unspecified_parameters: 3088 is_variadic = true; 3089 break; 3090 3091 case DW_TAG_template_type_parameter: 3092 case DW_TAG_template_value_parameter: 3093 // The one caller of this was never using the template_param_infos, 3094 // and the local variable was taking up a large amount of stack space 3095 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3096 // the template params back, we can add them back. 3097 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3098 break; 3099 3100 default: 3101 break; 3102 } 3103 } 3104 return arg_idx; 3105 } 3106 3107 void 3108 DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc, 3109 const DWARFDIE &parent_die, 3110 int64_t& first_index, 3111 std::vector<uint64_t>& element_orders, 3112 uint32_t& byte_stride, 3113 uint32_t& bit_stride) 3114 { 3115 if (!parent_die) 3116 return; 3117 3118 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3119 { 3120 const dw_tag_t tag = die.Tag(); 3121 switch (tag) 3122 { 3123 case DW_TAG_subrange_type: 3124 { 3125 DWARFAttributes attributes; 3126 const size_t num_child_attributes = die.GetAttributes(attributes); 3127 if (num_child_attributes > 0) 3128 { 3129 uint64_t num_elements = 0; 3130 uint64_t lower_bound = 0; 3131 uint64_t upper_bound = 0; 3132 bool upper_bound_valid = false; 3133 uint32_t i; 3134 for (i=0; i<num_child_attributes; ++i) 3135 { 3136 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3137 DWARFFormValue form_value; 3138 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3139 { 3140 switch (attr) 3141 { 3142 case DW_AT_name: 3143 break; 3144 3145 case DW_AT_count: 3146 num_elements = form_value.Unsigned(); 3147 break; 3148 3149 case DW_AT_bit_stride: 3150 bit_stride = form_value.Unsigned(); 3151 break; 3152 3153 case DW_AT_byte_stride: 3154 byte_stride = form_value.Unsigned(); 3155 break; 3156 3157 case DW_AT_lower_bound: 3158 lower_bound = form_value.Unsigned(); 3159 break; 3160 3161 case DW_AT_upper_bound: 3162 upper_bound_valid = true; 3163 upper_bound = form_value.Unsigned(); 3164 break; 3165 3166 default: 3167 case DW_AT_abstract_origin: 3168 case DW_AT_accessibility: 3169 case DW_AT_allocated: 3170 case DW_AT_associated: 3171 case DW_AT_data_location: 3172 case DW_AT_declaration: 3173 case DW_AT_description: 3174 case DW_AT_sibling: 3175 case DW_AT_threads_scaled: 3176 case DW_AT_type: 3177 case DW_AT_visibility: 3178 break; 3179 } 3180 } 3181 } 3182 3183 if (num_elements == 0) 3184 { 3185 if (upper_bound_valid && upper_bound >= lower_bound) 3186 num_elements = upper_bound - lower_bound + 1; 3187 } 3188 3189 element_orders.push_back (num_elements); 3190 } 3191 } 3192 break; 3193 } 3194 } 3195 } 3196 3197 Type * 3198 DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die) 3199 { 3200 if (die) 3201 { 3202 SymbolFileDWARF *dwarf = die.GetDWARF(); 3203 DWARFAttributes attributes; 3204 const size_t num_attributes = die.GetAttributes(attributes); 3205 if (num_attributes > 0) 3206 { 3207 DWARFFormValue type_die_form; 3208 for (size_t i = 0; i < num_attributes; ++i) 3209 { 3210 dw_attr_t attr = attributes.AttributeAtIndex(i); 3211 DWARFFormValue form_value; 3212 3213 if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value)) 3214 return dwarf->ResolveTypeUID(DIERef(form_value).GetUID()); 3215 } 3216 } 3217 } 3218 3219 return nullptr; 3220 } 3221 3222 clang::Decl * 3223 DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die) 3224 { 3225 if (!die) 3226 return nullptr; 3227 3228 switch (die.Tag()) 3229 { 3230 case DW_TAG_variable: 3231 case DW_TAG_constant: 3232 case DW_TAG_formal_parameter: 3233 case DW_TAG_imported_declaration: 3234 case DW_TAG_imported_module: 3235 break; 3236 default: 3237 return nullptr; 3238 } 3239 3240 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3241 if (cache_pos != m_die_to_decl.end()) 3242 return cache_pos->second; 3243 3244 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) 3245 { 3246 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3247 m_die_to_decl[die.GetDIE()] = decl; 3248 m_decl_to_die[decl].insert(die.GetDIE()); 3249 return decl; 3250 } 3251 3252 clang::Decl *decl = nullptr; 3253 switch (die.Tag()) 3254 { 3255 case DW_TAG_variable: 3256 case DW_TAG_constant: 3257 case DW_TAG_formal_parameter: 3258 { 3259 SymbolFileDWARF *dwarf = die.GetDWARF(); 3260 Type *type = GetTypeForDIE(die); 3261 const char *name = die.GetName(); 3262 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3263 decl = m_ast.CreateVariableDeclaration( 3264 decl_context, 3265 name, 3266 ClangASTContext::GetQualType(type->GetForwardCompilerType())); 3267 break; 3268 } 3269 case DW_TAG_imported_declaration: 3270 { 3271 SymbolFileDWARF *dwarf = die.GetDWARF(); 3272 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3273 3274 if (dwarf->UserIDMatches(imported_uid)) 3275 { 3276 CompilerDecl imported_decl = dwarf->GetDeclForUID(imported_uid); 3277 if (imported_decl) 3278 { 3279 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3280 if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl())) 3281 decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3282 } 3283 } 3284 break; 3285 } 3286 case DW_TAG_imported_module: 3287 { 3288 SymbolFileDWARF *dwarf = die.GetDWARF(); 3289 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3290 3291 if (dwarf->UserIDMatches(imported_uid)) 3292 { 3293 CompilerDeclContext imported_decl = dwarf->GetDeclContextForUID(imported_uid); 3294 if (imported_decl) 3295 { 3296 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3297 if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl)) 3298 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3299 } 3300 } 3301 break; 3302 } 3303 default: 3304 break; 3305 } 3306 3307 m_die_to_decl[die.GetDIE()] = decl; 3308 m_decl_to_die[decl].insert(die.GetDIE()); 3309 3310 return decl; 3311 } 3312 3313 clang::DeclContext * 3314 DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die) 3315 { 3316 if (die) 3317 { 3318 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die); 3319 if (decl_ctx) 3320 return decl_ctx; 3321 3322 bool try_parsing_type = true; 3323 switch (die.Tag()) 3324 { 3325 case DW_TAG_compile_unit: 3326 decl_ctx = m_ast.GetTranslationUnitDecl(); 3327 try_parsing_type = false; 3328 break; 3329 3330 case DW_TAG_namespace: 3331 decl_ctx = ResolveNamespaceDIE (die); 3332 try_parsing_type = false; 3333 break; 3334 3335 case DW_TAG_lexical_block: 3336 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3337 try_parsing_type = false; 3338 break; 3339 3340 default: 3341 break; 3342 } 3343 3344 if (decl_ctx == nullptr && try_parsing_type) 3345 { 3346 Type* type = die.GetDWARF()->ResolveType (die); 3347 if (type) 3348 decl_ctx = GetCachedClangDeclContextForDIE (die); 3349 } 3350 3351 if (decl_ctx) 3352 { 3353 LinkDeclContextToDIE (decl_ctx, die); 3354 return decl_ctx; 3355 } 3356 } 3357 return nullptr; 3358 } 3359 3360 clang::BlockDecl * 3361 DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die) 3362 { 3363 if (die && die.Tag() == DW_TAG_lexical_block) 3364 { 3365 clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3366 3367 if (!decl) 3368 { 3369 DWARFDIE decl_context_die; 3370 clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die); 3371 decl = m_ast.CreateBlockDeclaration(decl_context); 3372 3373 if (decl) 3374 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3375 } 3376 3377 return decl; 3378 } 3379 return nullptr; 3380 } 3381 3382 clang::NamespaceDecl * 3383 DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &die) 3384 { 3385 if (die && die.Tag() == DW_TAG_namespace) 3386 { 3387 // See if we already parsed this namespace DIE and associated it with a 3388 // uniqued namespace declaration 3389 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3390 if (namespace_decl) 3391 return namespace_decl; 3392 else 3393 { 3394 const char *namespace_name = die.GetName(); 3395 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 3396 namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx); 3397 Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3398 if (log) 3399 { 3400 SymbolFileDWARF *dwarf = die.GetDWARF(); 3401 if (namespace_name) 3402 { 3403 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3404 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)", 3405 static_cast<void*>(m_ast.getASTContext()), 3406 die.GetID(), 3407 namespace_name, 3408 static_cast<void*>(namespace_decl), 3409 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3410 } 3411 else 3412 { 3413 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3414 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)", 3415 static_cast<void*>(m_ast.getASTContext()), 3416 die.GetID(), 3417 static_cast<void*>(namespace_decl), 3418 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3419 } 3420 } 3421 3422 if (namespace_decl) 3423 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die); 3424 return namespace_decl; 3425 } 3426 } 3427 return nullptr; 3428 } 3429 3430 clang::DeclContext * 3431 DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die, 3432 DWARFDIE *decl_ctx_die_copy) 3433 { 3434 SymbolFileDWARF *dwarf = die.GetDWARF(); 3435 3436 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die); 3437 3438 if (decl_ctx_die_copy) 3439 *decl_ctx_die_copy = decl_ctx_die; 3440 3441 if (decl_ctx_die) 3442 { 3443 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die); 3444 if (clang_decl_ctx) 3445 return clang_decl_ctx; 3446 } 3447 return m_ast.GetTranslationUnitDecl(); 3448 } 3449 3450 clang::DeclContext * 3451 DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die) 3452 { 3453 if (die) 3454 { 3455 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3456 if (pos != m_die_to_decl_ctx.end()) 3457 return pos->second; 3458 } 3459 return nullptr; 3460 } 3461 3462 void 3463 DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die) 3464 { 3465 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3466 // There can be many DIEs for a single decl context 3467 //m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3468 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3469 } 3470 3471 bool 3472 DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die, 3473 const DWARFDIE &dst_class_die, 3474 lldb_private::Type *class_type, 3475 DWARFDIECollection &failures) 3476 { 3477 if (!class_type || !src_class_die || !dst_class_die) 3478 return false; 3479 if (src_class_die.Tag() != dst_class_die.Tag()) 3480 return false; 3481 3482 // We need to complete the class type so we can get all of the method types 3483 // parsed so we can then unique those types to their equivalent counterparts 3484 // in "dst_cu" and "dst_class_die" 3485 class_type->GetFullCompilerType (); 3486 3487 DWARFDIE src_die; 3488 DWARFDIE dst_die; 3489 UniqueCStringMap<DWARFDIE> src_name_to_die; 3490 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3491 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3492 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3493 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); src_die = src_die.GetSibling()) 3494 { 3495 if (src_die.Tag() == DW_TAG_subprogram) 3496 { 3497 // Make sure this is a declaration and not a concrete instance by looking 3498 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3499 // are placed inside the class definitions and shouldn't be included in 3500 // the list of things are are tracking here. 3501 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3502 { 3503 const char *src_name = src_die.GetMangledName (); 3504 if (src_name) 3505 { 3506 ConstString src_const_name(src_name); 3507 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3508 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die); 3509 else 3510 src_name_to_die.Append(src_const_name.GetCString(), src_die); 3511 } 3512 } 3513 } 3514 } 3515 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); dst_die = dst_die.GetSibling()) 3516 { 3517 if (dst_die.Tag() == DW_TAG_subprogram) 3518 { 3519 // Make sure this is a declaration and not a concrete instance by looking 3520 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3521 // are placed inside the class definitions and shouldn't be included in 3522 // the list of things are are tracking here. 3523 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3524 { 3525 const char *dst_name = dst_die.GetMangledName (); 3526 if (dst_name) 3527 { 3528 ConstString dst_const_name(dst_name); 3529 if ( dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3530 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die); 3531 else 3532 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die); 3533 } 3534 } 3535 } 3536 } 3537 const uint32_t src_size = src_name_to_die.GetSize (); 3538 const uint32_t dst_size = dst_name_to_die.GetSize (); 3539 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION)); 3540 3541 // Is everything kosher so we can go through the members at top speed? 3542 bool fast_path = true; 3543 3544 if (src_size != dst_size) 3545 { 3546 if (src_size != 0 && dst_size != 0) 3547 { 3548 if (log) 3549 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)", 3550 src_class_die.GetOffset(), 3551 dst_class_die.GetOffset(), 3552 src_size, 3553 dst_size); 3554 } 3555 3556 fast_path = false; 3557 } 3558 3559 uint32_t idx; 3560 3561 if (fast_path) 3562 { 3563 for (idx = 0; idx < src_size; ++idx) 3564 { 3565 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3566 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3567 3568 if (src_die.Tag() != dst_die.Tag()) 3569 { 3570 if (log) 3571 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3572 src_class_die.GetOffset(), 3573 dst_class_die.GetOffset(), 3574 src_die.GetOffset(), 3575 src_die.GetTagAsCString(), 3576 dst_die.GetOffset(), 3577 dst_die.GetTagAsCString()); 3578 fast_path = false; 3579 } 3580 3581 const char *src_name = src_die.GetMangledName (); 3582 const char *dst_name = dst_die.GetMangledName (); 3583 3584 // Make sure the names match 3585 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0)) 3586 continue; 3587 3588 if (log) 3589 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3590 src_class_die.GetOffset(), 3591 dst_class_die.GetOffset(), 3592 src_die.GetOffset(), 3593 src_name, 3594 dst_die.GetOffset(), 3595 dst_name); 3596 3597 fast_path = false; 3598 } 3599 } 3600 3601 DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser(); 3602 DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3603 3604 // Now do the work of linking the DeclContexts and Types. 3605 if (fast_path) 3606 { 3607 // We can do this quickly. Just run across the tables index-for-index since 3608 // we know each node has matching names and tags. 3609 for (idx = 0; idx < src_size; ++idx) 3610 { 3611 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3612 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3613 3614 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3615 if (src_decl_ctx) 3616 { 3617 if (log) 3618 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3619 static_cast<void*>(src_decl_ctx), 3620 src_die.GetOffset(), dst_die.GetOffset()); 3621 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3622 } 3623 else 3624 { 3625 if (log) 3626 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", 3627 src_die.GetOffset(), dst_die.GetOffset()); 3628 } 3629 3630 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3631 if (src_child_type) 3632 { 3633 if (log) 3634 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3635 static_cast<void*>(src_child_type), 3636 src_child_type->GetID(), 3637 src_die.GetOffset(), dst_die.GetOffset()); 3638 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3639 } 3640 else 3641 { 3642 if (log) 3643 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3644 } 3645 } 3646 } 3647 else 3648 { 3649 // We must do this slowly. For each member of the destination, look 3650 // up a member in the source with the same name, check its tag, and 3651 // unique them if everything matches up. Report failures. 3652 3653 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) 3654 { 3655 src_name_to_die.Sort(); 3656 3657 for (idx = 0; idx < dst_size; ++idx) 3658 { 3659 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3660 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3661 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3662 3663 if (src_die && (src_die.Tag() == dst_die.Tag())) 3664 { 3665 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3666 if (src_decl_ctx) 3667 { 3668 if (log) 3669 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3670 static_cast<void*>(src_decl_ctx), 3671 src_die.GetOffset(), 3672 dst_die.GetOffset()); 3673 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3674 } 3675 else 3676 { 3677 if (log) 3678 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3679 } 3680 3681 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3682 if (src_child_type) 3683 { 3684 if (log) 3685 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3686 static_cast<void*>(src_child_type), 3687 src_child_type->GetID(), 3688 src_die.GetOffset(), 3689 dst_die.GetOffset()); 3690 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3691 } 3692 else 3693 { 3694 if (log) 3695 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3696 } 3697 } 3698 else 3699 { 3700 if (log) 3701 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die.GetOffset()); 3702 3703 failures.Append(dst_die); 3704 } 3705 } 3706 } 3707 } 3708 3709 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize (); 3710 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize (); 3711 3712 if (src_size_artificial && dst_size_artificial) 3713 { 3714 dst_name_to_die_artificial.Sort(); 3715 3716 for (idx = 0; idx < src_size_artificial; ++idx) 3717 { 3718 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx); 3719 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 3720 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3721 3722 if (dst_die) 3723 { 3724 // Both classes have the artificial types, link them 3725 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3726 if (src_decl_ctx) 3727 { 3728 if (log) 3729 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3730 static_cast<void*>(src_decl_ctx), 3731 src_die.GetOffset(), dst_die.GetOffset()); 3732 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3733 } 3734 else 3735 { 3736 if (log) 3737 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3738 } 3739 3740 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3741 if (src_child_type) 3742 { 3743 if (log) 3744 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3745 static_cast<void*>(src_child_type), 3746 src_child_type->GetID(), 3747 src_die.GetOffset(), dst_die.GetOffset()); 3748 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3749 } 3750 else 3751 { 3752 if (log) 3753 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3754 } 3755 } 3756 } 3757 } 3758 3759 if (dst_size_artificial) 3760 { 3761 for (idx = 0; idx < dst_size_artificial; ++idx) 3762 { 3763 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx); 3764 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 3765 if (log) 3766 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die.GetOffset(), dst_name_artificial); 3767 3768 failures.Append(dst_die); 3769 } 3770 } 3771 3772 return (failures.Size() != 0); 3773 } 3774 3775 3776 bool 3777 DWARFASTParserClang::LayoutRecordType(const clang::RecordDecl *record_decl, 3778 uint64_t &bit_size, 3779 uint64_t &alignment, 3780 llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets, 3781 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets, 3782 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets) 3783 { 3784 RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl); 3785 bool success = false; 3786 base_offsets.clear(); 3787 vbase_offsets.clear(); 3788 if (pos != m_record_decl_to_layout_map.end()) 3789 { 3790 bit_size = pos->second.bit_size; 3791 alignment = pos->second.alignment; 3792 field_offsets.swap(pos->second.field_offsets); 3793 base_offsets.swap (pos->second.base_offsets); 3794 vbase_offsets.swap (pos->second.vbase_offsets); 3795 m_record_decl_to_layout_map.erase(pos); 3796 success = true; 3797 } 3798 else 3799 { 3800 bit_size = 0; 3801 alignment = 0; 3802 field_offsets.clear(); 3803 } 3804 return success; 3805 } 3806