DWARFASTParserClang.cpp revision 294024
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/ClangASTImporter.h" 28#include "lldb/Symbol/ClangExternalASTSourceCommon.h" 29#include "lldb/Symbol/CompileUnit.h" 30#include "lldb/Symbol/Function.h" 31#include "lldb/Symbol/ObjectFile.h" 32#include "lldb/Symbol/SymbolVendor.h" 33#include "lldb/Symbol/TypeList.h" 34#include "lldb/Symbol/TypeMap.h" 35#include "lldb/Target/Language.h" 36#include "Plugins/Language/ObjC/ObjCLanguage.h" 37 38#include "clang/AST/DeclCXX.h" 39#include "clang/AST/DeclObjC.h" 40 41#include <map> 42#include <vector> 43 44//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 45 46#ifdef ENABLE_DEBUG_PRINTF 47#include <stdio.h> 48#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 49#else 50#define DEBUG_PRINTF(fmt, ...) 51#endif 52 53 54using namespace lldb; 55using namespace lldb_private; 56DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) : 57 m_ast (ast), 58 m_die_to_decl_ctx (), 59 m_decl_ctx_to_die () 60{ 61} 62 63DWARFASTParserClang::~DWARFASTParserClang () 64{ 65} 66 67 68static AccessType 69DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility) 70{ 71 switch (dwarf_accessibility) 72 { 73 case DW_ACCESS_public: return eAccessPublic; 74 case DW_ACCESS_private: return eAccessPrivate; 75 case DW_ACCESS_protected: return eAccessProtected; 76 default: break; 77 } 78 return eAccessNone; 79} 80 81static bool 82DeclKindIsCXXClass (clang::Decl::Kind decl_kind) 83{ 84 switch (decl_kind) 85 { 86 case clang::Decl::CXXRecord: 87 case clang::Decl::ClassTemplateSpecialization: 88 return true; 89 default: 90 break; 91 } 92 return false; 93} 94 95struct BitfieldInfo 96{ 97 uint64_t bit_size; 98 uint64_t bit_offset; 99 100 BitfieldInfo () : 101 bit_size (LLDB_INVALID_ADDRESS), 102 bit_offset (LLDB_INVALID_ADDRESS) 103 { 104 } 105 106 void 107 Clear() 108 { 109 bit_size = LLDB_INVALID_ADDRESS; 110 bit_offset = LLDB_INVALID_ADDRESS; 111 } 112 113 bool IsValid () 114 { 115 return (bit_size != LLDB_INVALID_ADDRESS) && 116 (bit_offset != LLDB_INVALID_ADDRESS); 117 } 118}; 119 120 121ClangASTImporter & 122DWARFASTParserClang::GetClangASTImporter() 123{ 124 if (!m_clang_ast_importer_ap) 125 { 126 m_clang_ast_importer_ap.reset (new ClangASTImporter); 127 } 128 return *m_clang_ast_importer_ap; 129} 130 131 132TypeSP 133DWARFASTParserClang::ParseTypeFromDWO (const DWARFDIE &die, Log *log) 134{ 135 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 136 if (dwo_module_sp) 137 { 138 // This type comes from an external DWO module 139 std::vector<CompilerContext> dwo_context; 140 die.GetDWOContext(dwo_context); 141 TypeMap dwo_types; 142 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, dwo_types)) 143 { 144 const size_t num_dwo_types = dwo_types.GetSize(); 145 if (num_dwo_types == 1) 146 { 147 // We found a real definition for this type elsewhere 148 // so lets use it and cache the fact that we found 149 // a complete type for this die 150 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 151 if (dwo_type_sp) 152 { 153 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 154 155 lldb_private::CompilerType type = GetClangASTImporter().CopyType (m_ast, dwo_type); 156 157 //printf ("copied_qual_type: ast = %p, clang_type = %p, name = '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), external_type->GetName().GetCString()); 158 if (type) 159 { 160 SymbolFileDWARF *dwarf = die.GetDWARF(); 161 TypeSP type_sp (new Type (die.GetID(), 162 dwarf, 163 dwo_type_sp->GetName(), 164 dwo_type_sp->GetByteSize(), 165 NULL, 166 LLDB_INVALID_UID, 167 Type::eEncodingInvalid, 168 &dwo_type_sp->GetDeclaration(), 169 type, 170 Type::eResolveStateForward)); 171 172 dwarf->GetTypeList()->Insert(type_sp); 173 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 174 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 175 if (tag_decl) 176 LinkDeclContextToDIE(tag_decl, die); 177 else 178 { 179 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 180 if (defn_decl_ctx) 181 LinkDeclContextToDIE(defn_decl_ctx, die); 182 } 183 return type_sp; 184 } 185 } 186 } 187 } 188 } 189 return TypeSP(); 190} 191 192TypeSP 193DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc, 194 const DWARFDIE &die, 195 Log *log, 196 bool *type_is_new_ptr) 197{ 198 TypeSP type_sp; 199 200 if (type_is_new_ptr) 201 *type_is_new_ptr = false; 202 203 AccessType accessibility = eAccessNone; 204 if (die) 205 { 206 SymbolFileDWARF *dwarf = die.GetDWARF(); 207 if (log) 208 { 209 DWARFDIE context_die; 210 clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die); 211 212 dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 213 die.GetOffset(), 214 static_cast<void*>(context), 215 context_die.GetOffset(), 216 die.GetTagAsCString(), 217 die.GetName()); 218 219 } 220 // 221 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 222 // if (log && dwarf_cu) 223 // { 224 // StreamString s; 225 // die->DumpLocation (this, dwarf_cu, s); 226 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 227 // 228 // } 229 230 Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE()); 231 TypeList* type_list = dwarf->GetTypeList(); 232 if (type_ptr == NULL) 233 { 234 if (type_is_new_ptr) 235 *type_is_new_ptr = true; 236 237 const dw_tag_t tag = die.Tag(); 238 239 bool is_forward_declaration = false; 240 DWARFAttributes attributes; 241 const char *type_name_cstr = NULL; 242 ConstString type_name_const_str; 243 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 244 uint64_t byte_size = 0; 245 Declaration decl; 246 247 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 248 CompilerType clang_type; 249 DWARFFormValue form_value; 250 251 dw_attr_t attr; 252 253 switch (tag) 254 { 255 case DW_TAG_base_type: 256 case DW_TAG_pointer_type: 257 case DW_TAG_reference_type: 258 case DW_TAG_rvalue_reference_type: 259 case DW_TAG_typedef: 260 case DW_TAG_const_type: 261 case DW_TAG_restrict_type: 262 case DW_TAG_volatile_type: 263 case DW_TAG_unspecified_type: 264 { 265 // Set a bit that lets us know that we are currently parsing this 266 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 267 268 const size_t num_attributes = die.GetAttributes (attributes); 269 uint32_t encoding = 0; 270 lldb::user_id_t encoding_uid = LLDB_INVALID_UID; 271 272 if (num_attributes > 0) 273 { 274 uint32_t i; 275 for (i=0; i<num_attributes; ++i) 276 { 277 attr = attributes.AttributeAtIndex(i); 278 if (attributes.ExtractFormValueAtIndex(i, form_value)) 279 { 280 switch (attr) 281 { 282 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 283 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 284 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 285 case DW_AT_name: 286 287 type_name_cstr = form_value.AsCString(); 288 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't 289 // include the "&"... 290 if (tag == DW_TAG_reference_type) 291 { 292 if (strchr (type_name_cstr, '&') == NULL) 293 type_name_cstr = NULL; 294 } 295 if (type_name_cstr) 296 type_name_const_str.SetCString(type_name_cstr); 297 break; 298 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 299 case DW_AT_encoding: encoding = form_value.Unsigned(); break; 300 case DW_AT_type: encoding_uid = DIERef(form_value).GetUID(); break; 301 default: 302 case DW_AT_sibling: 303 break; 304 } 305 } 306 } 307 } 308 309 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); 310 311 switch (tag) 312 { 313 default: 314 break; 315 316 case DW_TAG_unspecified_type: 317 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 318 strcmp(type_name_cstr, "decltype(nullptr)") == 0 ) 319 { 320 resolve_state = Type::eResolveStateFull; 321 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 322 break; 323 } 324 // Fall through to base type below in case we can handle the type there... 325 326 case DW_TAG_base_type: 327 resolve_state = Type::eResolveStateFull; 328 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr, 329 encoding, 330 byte_size * 8); 331 break; 332 333 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break; 334 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break; 335 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; 336 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break; 337 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break; 338 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break; 339 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break; 340 } 341 342 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL) 343 { 344 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 345 346 if (translation_unit_is_objc) 347 { 348 if (type_name_cstr != NULL) 349 { 350 static ConstString g_objc_type_name_id("id"); 351 static ConstString g_objc_type_name_Class("Class"); 352 static ConstString g_objc_type_name_selector("SEL"); 353 354 if (type_name_const_str == g_objc_type_name_id) 355 { 356 if (log) 357 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 358 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.", 359 die.GetOffset(), 360 die.GetTagAsCString(), 361 die.GetName()); 362 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 363 encoding_data_type = Type::eEncodingIsUID; 364 encoding_uid = LLDB_INVALID_UID; 365 resolve_state = Type::eResolveStateFull; 366 367 } 368 else if (type_name_const_str == g_objc_type_name_Class) 369 { 370 if (log) 371 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 372 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.", 373 die.GetOffset(), 374 die.GetTagAsCString(), 375 die.GetName()); 376 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 377 encoding_data_type = Type::eEncodingIsUID; 378 encoding_uid = LLDB_INVALID_UID; 379 resolve_state = Type::eResolveStateFull; 380 } 381 else if (type_name_const_str == g_objc_type_name_selector) 382 { 383 if (log) 384 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 385 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.", 386 die.GetOffset(), 387 die.GetTagAsCString(), 388 die.GetName()); 389 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 390 encoding_data_type = Type::eEncodingIsUID; 391 encoding_uid = LLDB_INVALID_UID; 392 resolve_state = Type::eResolveStateFull; 393 } 394 } 395 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID) 396 { 397 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id". 398 399 const DWARFDIE encoding_die = die.GetDIE(encoding_uid); 400 401 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) 402 { 403 if (const char *struct_name = encoding_die.GetName()) 404 { 405 if (!strcmp(struct_name, "objc_object")) 406 { 407 if (log) 408 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 409 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.", 410 die.GetOffset(), 411 die.GetTagAsCString(), 412 die.GetName()); 413 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 414 encoding_data_type = Type::eEncodingIsUID; 415 encoding_uid = LLDB_INVALID_UID; 416 resolve_state = Type::eResolveStateFull; 417 } 418 } 419 } 420 } 421 } 422 } 423 424 type_sp.reset( new Type (die.GetID(), 425 dwarf, 426 type_name_const_str, 427 byte_size, 428 NULL, 429 encoding_uid, 430 encoding_data_type, 431 &decl, 432 clang_type, 433 resolve_state)); 434 435 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 436 437 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false); 438 // if (encoding_type != NULL) 439 // { 440 // if (encoding_type != DIE_IS_BEING_PARSED) 441 // type_sp->SetEncodingType(encoding_type); 442 // else 443 // m_indirect_fixups.push_back(type_sp.get()); 444 // } 445 } 446 break; 447 448 case DW_TAG_structure_type: 449 case DW_TAG_union_type: 450 case DW_TAG_class_type: 451 { 452 // Set a bit that lets us know that we are currently parsing this 453 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 454 bool byte_size_valid = false; 455 456 LanguageType class_language = eLanguageTypeUnknown; 457 bool is_complete_objc_class = false; 458 //bool struct_is_class = false; 459 const size_t num_attributes = die.GetAttributes (attributes); 460 if (num_attributes > 0) 461 { 462 uint32_t i; 463 for (i=0; i<num_attributes; ++i) 464 { 465 attr = attributes.AttributeAtIndex(i); 466 if (attributes.ExtractFormValueAtIndex(i, form_value)) 467 { 468 switch (attr) 469 { 470 case DW_AT_decl_file: 471 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) 472 { 473 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always 474 // point to the compile unit file, so we clear this invalid value 475 // so that we can still unique types efficiently. 476 decl.SetFile(FileSpec ("<invalid>", false)); 477 } 478 else 479 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); 480 break; 481 482 case DW_AT_decl_line: 483 decl.SetLine(form_value.Unsigned()); 484 break; 485 486 case DW_AT_decl_column: 487 decl.SetColumn(form_value.Unsigned()); 488 break; 489 490 case DW_AT_name: 491 type_name_cstr = form_value.AsCString(); 492 type_name_const_str.SetCString(type_name_cstr); 493 break; 494 495 case DW_AT_byte_size: 496 byte_size = form_value.Unsigned(); 497 byte_size_valid = true; 498 break; 499 500 case DW_AT_accessibility: 501 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 502 break; 503 504 case DW_AT_declaration: 505 is_forward_declaration = form_value.Boolean(); 506 break; 507 508 case DW_AT_APPLE_runtime_class: 509 class_language = (LanguageType)form_value.Signed(); 510 break; 511 512 case DW_AT_APPLE_objc_complete_type: 513 is_complete_objc_class = form_value.Signed(); 514 break; 515 516 case DW_AT_allocated: 517 case DW_AT_associated: 518 case DW_AT_data_location: 519 case DW_AT_description: 520 case DW_AT_start_scope: 521 case DW_AT_visibility: 522 default: 523 case DW_AT_sibling: 524 break; 525 } 526 } 527 } 528 } 529 530 // UniqueDWARFASTType is large, so don't create a local variables on the 531 // stack, put it on the heap. This function is often called recursively 532 // and clang isn't good and sharing the stack space for variables in different blocks. 533 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType()); 534 535 if (type_name_const_str) 536 { 537 LanguageType die_language = die.GetLanguage(); 538 bool handled = false; 539 if (Language::LanguageIsCPlusPlus(die_language)) 540 { 541 std::string qualified_name; 542 if (die.GetQualifiedName(qualified_name)) 543 { 544 handled = true; 545 ConstString const_qualified_name(qualified_name); 546 if (dwarf->GetUniqueDWARFASTTypeMap().Find(const_qualified_name, die, Declaration(), 547 byte_size_valid ? byte_size : -1, 548 *unique_ast_entry_ap)) 549 { 550 type_sp = unique_ast_entry_ap->m_type_sp; 551 if (type_sp) 552 { 553 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 554 return type_sp; 555 } 556 } 557 } 558 } 559 560 if (!handled) 561 { 562 if (dwarf->GetUniqueDWARFASTTypeMap().Find(type_name_const_str, die, decl, 563 byte_size_valid ? byte_size : -1, 564 *unique_ast_entry_ap)) 565 { 566 type_sp = unique_ast_entry_ap->m_type_sp; 567 if (type_sp) 568 { 569 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 570 return type_sp; 571 } 572 } 573 } 574 } 575 576 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 577 578 int tag_decl_kind = -1; 579 AccessType default_accessibility = eAccessNone; 580 if (tag == DW_TAG_structure_type) 581 { 582 tag_decl_kind = clang::TTK_Struct; 583 default_accessibility = eAccessPublic; 584 } 585 else if (tag == DW_TAG_union_type) 586 { 587 tag_decl_kind = clang::TTK_Union; 588 default_accessibility = eAccessPublic; 589 } 590 else if (tag == DW_TAG_class_type) 591 { 592 tag_decl_kind = clang::TTK_Class; 593 default_accessibility = eAccessPrivate; 594 } 595 596 if (byte_size_valid && byte_size == 0 && type_name_cstr && 597 die.HasChildren() == false && 598 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) 599 { 600 // Work around an issue with clang at the moment where 601 // forward declarations for objective C classes are emitted 602 // as: 603 // DW_TAG_structure_type [2] 604 // DW_AT_name( "ForwardObjcClass" ) 605 // DW_AT_byte_size( 0x00 ) 606 // DW_AT_decl_file( "..." ) 607 // DW_AT_decl_line( 1 ) 608 // 609 // Note that there is no DW_AT_declaration and there are 610 // no children, and the byte size is zero. 611 is_forward_declaration = true; 612 } 613 614 if (class_language == eLanguageTypeObjC || 615 class_language == eLanguageTypeObjC_plus_plus) 616 { 617 if (!is_complete_objc_class && die.Supports_DW_AT_APPLE_objc_complete_type()) 618 { 619 // We have a valid eSymbolTypeObjCClass class symbol whose 620 // name matches the current objective C class that we 621 // are trying to find and this DIE isn't the complete 622 // definition (we checked is_complete_objc_class above and 623 // know it is false), so the real definition is in here somewhere 624 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 625 626 if (!type_sp) 627 { 628 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 629 if (debug_map_symfile) 630 { 631 // We weren't able to find a full declaration in 632 // this DWARF, see if we have a declaration anywhere 633 // else... 634 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 635 } 636 } 637 638 if (type_sp) 639 { 640 if (log) 641 { 642 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 643 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64, 644 static_cast<void*>(this), 645 die.GetOffset(), 646 DW_TAG_value_to_name(tag), 647 type_name_cstr, 648 type_sp->GetID()); 649 } 650 651 // We found a real definition for this type elsewhere 652 // so lets use it and cache the fact that we found 653 // a complete type for this die 654 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 655 return type_sp; 656 } 657 } 658 } 659 660 661 if (is_forward_declaration) 662 { 663 // We have a forward declaration to a type and we need 664 // to try and find a full declaration. We look in the 665 // current type index just in case we have a forward 666 // declaration followed by an actual declarations in the 667 // DWARF. If this fails, we need to look elsewhere... 668 if (log) 669 { 670 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 671 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type", 672 static_cast<void*>(this), 673 die.GetOffset(), 674 DW_TAG_value_to_name(tag), 675 type_name_cstr); 676 } 677 678 // See if the type comes from a DWO module and if so, track down that type. 679 type_sp = ParseTypeFromDWO(die, log); 680 if (type_sp) 681 return type_sp; 682 683 DWARFDeclContext die_decl_ctx; 684 die.GetDWARFDeclContext(die_decl_ctx); 685 686 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str); 687 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 688 689 if (!type_sp) 690 { 691 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 692 if (debug_map_symfile) 693 { 694 // We weren't able to find a full declaration in 695 // this DWARF, see if we have a declaration anywhere 696 // else... 697 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 698 } 699 } 700 701 if (type_sp) 702 { 703 if (log) 704 { 705 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 706 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 707 static_cast<void*>(this), 708 die.GetOffset(), 709 DW_TAG_value_to_name(tag), 710 type_name_cstr, 711 type_sp->GetID()); 712 } 713 714 // We found a real definition for this type elsewhere 715 // so lets use it and cache the fact that we found 716 // a complete type for this die 717 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 718 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 719 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID()))); 720 if (defn_decl_ctx) 721 LinkDeclContextToDIE(defn_decl_ctx, die); 722 return type_sp; 723 } 724 } 725 assert (tag_decl_kind != -1); 726 bool clang_type_was_created = false; 727 clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 728 if (!clang_type) 729 { 730 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 731 if (accessibility == eAccessNone && decl_ctx) 732 { 733 // Check the decl context that contains this class/struct/union. 734 // If it is a class we must give it an accessibility. 735 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 736 if (DeclKindIsCXXClass (containing_decl_kind)) 737 accessibility = default_accessibility; 738 } 739 740 ClangASTMetadata metadata; 741 metadata.SetUserID(die.GetID()); 742 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die)); 743 744 if (type_name_cstr && strchr (type_name_cstr, '<')) 745 { 746 ClangASTContext::TemplateParameterInfos template_param_infos; 747 if (ParseTemplateParameterInfos (die, template_param_infos)) 748 { 749 clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx, 750 accessibility, 751 type_name_cstr, 752 tag_decl_kind, 753 template_param_infos); 754 755 clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx, 756 class_template_decl, 757 tag_decl_kind, 758 template_param_infos); 759 clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl); 760 clang_type_was_created = true; 761 762 m_ast.SetMetadata (class_template_decl, metadata); 763 m_ast.SetMetadata (class_specialization_decl, metadata); 764 } 765 } 766 767 if (!clang_type_was_created) 768 { 769 clang_type_was_created = true; 770 clang_type = m_ast.CreateRecordType (decl_ctx, 771 accessibility, 772 type_name_cstr, 773 tag_decl_kind, 774 class_language, 775 &metadata); 776 } 777 } 778 779 // Store a forward declaration to this class type in case any 780 // parameters in any class methods need it for the clang 781 // types for function prototypes. 782 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 783 type_sp.reset (new Type (die.GetID(), 784 dwarf, 785 type_name_const_str, 786 byte_size, 787 NULL, 788 LLDB_INVALID_UID, 789 Type::eEncodingIsUID, 790 &decl, 791 clang_type, 792 Type::eResolveStateForward)); 793 794 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 795 796 797 // Add our type to the unique type map so we don't 798 // end up creating many copies of the same type over 799 // and over in the ASTContext for our module 800 unique_ast_entry_ap->m_type_sp = type_sp; 801 unique_ast_entry_ap->m_die = die; 802 unique_ast_entry_ap->m_declaration = decl; 803 unique_ast_entry_ap->m_byte_size = byte_size; 804 dwarf->GetUniqueDWARFASTTypeMap().Insert (type_name_const_str, 805 *unique_ast_entry_ap); 806 807 if (is_forward_declaration && die.HasChildren()) 808 { 809 // Check to see if the DIE actually has a definition, some version of GCC will 810 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram, 811 // members, or inheritance, so we can't trust it 812 DWARFDIE child_die = die.GetFirstChild(); 813 while (child_die) 814 { 815 switch (child_die.Tag()) 816 { 817 case DW_TAG_inheritance: 818 case DW_TAG_subprogram: 819 case DW_TAG_member: 820 case DW_TAG_APPLE_property: 821 case DW_TAG_class_type: 822 case DW_TAG_structure_type: 823 case DW_TAG_enumeration_type: 824 case DW_TAG_typedef: 825 case DW_TAG_union_type: 826 child_die.Clear(); 827 is_forward_declaration = false; 828 break; 829 default: 830 child_die = child_die.GetSibling(); 831 break; 832 } 833 } 834 } 835 836 if (!is_forward_declaration) 837 { 838 // Always start the definition for a class type so that 839 // if the class has child classes or types that require 840 // the class to be created for use as their decl contexts 841 // the class will be ready to accept these child definitions. 842 if (die.HasChildren() == false) 843 { 844 // No children for this struct/union/class, lets finish it 845 ClangASTContext::StartTagDeclarationDefinition (clang_type); 846 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 847 848 if (tag == DW_TAG_structure_type) // this only applies in C 849 { 850 clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type); 851 852 if (record_decl) 853 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo())); 854 } 855 } 856 else if (clang_type_was_created) 857 { 858 // Start the definition if the class is not objective C since 859 // the underlying decls respond to isCompleteDefinition(). Objective 860 // C decls don't respond to isCompleteDefinition() so we can't 861 // start the declaration definition right away. For C++ class/union/structs 862 // we want to start the definition in case the class is needed as the 863 // declaration context for a contained class or type without the need 864 // to complete that type.. 865 866 if (class_language != eLanguageTypeObjC && 867 class_language != eLanguageTypeObjC_plus_plus) 868 ClangASTContext::StartTagDeclarationDefinition (clang_type); 869 870 // Leave this as a forward declaration until we need 871 // to know the details of the type. lldb_private::Type 872 // will automatically call the SymbolFile virtual function 873 // "SymbolFileDWARF::CompleteType(Type *)" 874 // When the definition needs to be defined. 875 assert(!dwarf->GetForwardDeclClangTypeToDie().count(ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()) && 876 "Type already in the forward declaration map!"); 877 assert(((SymbolFileDWARF*)m_ast.GetSymbolFile())->UserIDMatches(die.GetDIERef().GetUID()) && 878 "Adding incorrect type to forward declaration map"); 879 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType(); 880 dwarf->GetForwardDeclClangTypeToDie()[ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] = die.GetDIERef(); 881 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true); 882 } 883 } 884 } 885 break; 886 887 case DW_TAG_enumeration_type: 888 { 889 // Set a bit that lets us know that we are currently parsing this 890 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 891 892 DWARFFormValue encoding_form; 893 894 const size_t num_attributes = die.GetAttributes (attributes); 895 if (num_attributes > 0) 896 { 897 uint32_t i; 898 899 for (i=0; i<num_attributes; ++i) 900 { 901 attr = attributes.AttributeAtIndex(i); 902 if (attributes.ExtractFormValueAtIndex(i, form_value)) 903 { 904 switch (attr) 905 { 906 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 907 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 908 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 909 case DW_AT_name: 910 type_name_cstr = form_value.AsCString(); 911 type_name_const_str.SetCString(type_name_cstr); 912 break; 913 case DW_AT_type: encoding_form = form_value; break; 914 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 915 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 916 case DW_AT_declaration: is_forward_declaration = form_value.Boolean(); break; 917 case DW_AT_allocated: 918 case DW_AT_associated: 919 case DW_AT_bit_stride: 920 case DW_AT_byte_stride: 921 case DW_AT_data_location: 922 case DW_AT_description: 923 case DW_AT_start_scope: 924 case DW_AT_visibility: 925 case DW_AT_specification: 926 case DW_AT_abstract_origin: 927 case DW_AT_sibling: 928 break; 929 } 930 } 931 } 932 933 if (is_forward_declaration) 934 { 935 type_sp = ParseTypeFromDWO(die, log); 936 if (type_sp) 937 return type_sp; 938 939 DWARFDeclContext die_decl_ctx; 940 die.GetDWARFDeclContext(die_decl_ctx); 941 942 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 943 944 if (!type_sp) 945 { 946 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 947 if (debug_map_symfile) 948 { 949 // We weren't able to find a full declaration in 950 // this DWARF, see if we have a declaration anywhere 951 // else... 952 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 953 } 954 } 955 956 if (type_sp) 957 { 958 if (log) 959 { 960 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 961 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 962 static_cast<void*>(this), 963 die.GetOffset(), 964 DW_TAG_value_to_name(tag), 965 type_name_cstr, 966 type_sp->GetID()); 967 } 968 969 // We found a real definition for this type elsewhere 970 // so lets use it and cache the fact that we found 971 // a complete type for this die 972 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 973 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 974 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID()))); 975 if (defn_decl_ctx) 976 LinkDeclContextToDIE(defn_decl_ctx, die); 977 return type_sp; 978 } 979 980 } 981 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 982 983 CompilerType enumerator_clang_type; 984 clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 985 if (!clang_type) 986 { 987 if (encoding_form.IsValid()) 988 { 989 Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form).GetUID()); 990 if (enumerator_type) 991 enumerator_clang_type = enumerator_type->GetFullCompilerType (); 992 } 993 994 if (!enumerator_clang_type) 995 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL, 996 DW_ATE_signed, 997 byte_size * 8); 998 999 clang_type = m_ast.CreateEnumerationType (type_name_cstr, 1000 GetClangDeclContextContainingDIE (die, nullptr), 1001 decl, 1002 enumerator_clang_type); 1003 } 1004 else 1005 { 1006 enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType()); 1007 } 1008 1009 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 1010 1011 type_sp.reset( new Type (die.GetID(), 1012 dwarf, 1013 type_name_const_str, 1014 byte_size, 1015 NULL, 1016 DIERef(encoding_form).GetUID(), 1017 Type::eEncodingIsUID, 1018 &decl, 1019 clang_type, 1020 Type::eResolveStateForward)); 1021 1022 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1023 if (die.HasChildren()) 1024 { 1025 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1026 bool is_signed = false; 1027 enumerator_clang_type.IsIntegerType(is_signed); 1028 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die); 1029 } 1030 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 1031 } 1032 } 1033 break; 1034 1035 case DW_TAG_inlined_subroutine: 1036 case DW_TAG_subprogram: 1037 case DW_TAG_subroutine_type: 1038 { 1039 // Set a bit that lets us know that we are currently parsing this 1040 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1041 1042 DWARFFormValue type_die_form; 1043 bool is_variadic = false; 1044 bool is_inline = false; 1045 bool is_static = false; 1046 bool is_virtual = false; 1047 bool is_explicit = false; 1048 bool is_artificial = false; 1049 DWARFFormValue specification_die_form; 1050 DWARFFormValue abstract_origin_die_form; 1051 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1052 1053 unsigned type_quals = 0; 1054 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern 1055 1056 1057 const size_t num_attributes = die.GetAttributes (attributes); 1058 if (num_attributes > 0) 1059 { 1060 uint32_t i; 1061 for (i=0; i<num_attributes; ++i) 1062 { 1063 attr = attributes.AttributeAtIndex(i); 1064 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1065 { 1066 switch (attr) 1067 { 1068 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1069 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1070 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1071 case DW_AT_name: 1072 type_name_cstr = form_value.AsCString(); 1073 type_name_const_str.SetCString(type_name_cstr); 1074 break; 1075 1076 case DW_AT_linkage_name: 1077 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&dwarf->get_debug_str_data()); break; 1078 case DW_AT_type: type_die_form = form_value; break; 1079 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1080 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1081 case DW_AT_inline: is_inline = form_value.Boolean(); break; 1082 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break; 1083 case DW_AT_explicit: is_explicit = form_value.Boolean(); break; 1084 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 1085 1086 1087 case DW_AT_external: 1088 if (form_value.Unsigned()) 1089 { 1090 if (storage == clang::SC_None) 1091 storage = clang::SC_Extern; 1092 else 1093 storage = clang::SC_PrivateExtern; 1094 } 1095 break; 1096 1097 case DW_AT_specification: 1098 specification_die_form = form_value; 1099 break; 1100 1101 case DW_AT_abstract_origin: 1102 abstract_origin_die_form = form_value; 1103 break; 1104 1105 case DW_AT_object_pointer: 1106 object_pointer_die_offset = form_value.Reference(); 1107 break; 1108 1109 case DW_AT_allocated: 1110 case DW_AT_associated: 1111 case DW_AT_address_class: 1112 case DW_AT_calling_convention: 1113 case DW_AT_data_location: 1114 case DW_AT_elemental: 1115 case DW_AT_entry_pc: 1116 case DW_AT_frame_base: 1117 case DW_AT_high_pc: 1118 case DW_AT_low_pc: 1119 case DW_AT_prototyped: 1120 case DW_AT_pure: 1121 case DW_AT_ranges: 1122 case DW_AT_recursive: 1123 case DW_AT_return_addr: 1124 case DW_AT_segment: 1125 case DW_AT_start_scope: 1126 case DW_AT_static_link: 1127 case DW_AT_trampoline: 1128 case DW_AT_visibility: 1129 case DW_AT_vtable_elem_location: 1130 case DW_AT_description: 1131 case DW_AT_sibling: 1132 break; 1133 } 1134 } 1135 } 1136 } 1137 1138 std::string object_pointer_name; 1139 if (object_pointer_die_offset != DW_INVALID_OFFSET) 1140 { 1141 DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset); 1142 if (object_pointer_die) 1143 { 1144 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1145 if (object_pointer_name_cstr) 1146 object_pointer_name = object_pointer_name_cstr; 1147 } 1148 } 1149 1150 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1151 1152 CompilerType return_clang_type; 1153 Type *func_type = NULL; 1154 1155 if (type_die_form.IsValid()) 1156 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1157 1158 if (func_type) 1159 return_clang_type = func_type->GetForwardCompilerType (); 1160 else 1161 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1162 1163 1164 std::vector<CompilerType> function_param_types; 1165 std::vector<clang::ParmVarDecl*> function_param_decls; 1166 1167 // Parse the function children for the parameters 1168 1169 DWARFDIE decl_ctx_die; 1170 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, &decl_ctx_die); 1171 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind(); 1172 1173 const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind); 1174 // Start off static. This will be set to false in ParseChildParameters(...) 1175 // if we find a "this" parameters as the first parameter 1176 if (is_cxx_method) 1177 is_static = true; 1178 1179 if (die.HasChildren()) 1180 { 1181 bool skip_artificial = true; 1182 ParseChildParameters (sc, 1183 containing_decl_ctx, 1184 die, 1185 skip_artificial, 1186 is_static, 1187 is_variadic, 1188 function_param_types, 1189 function_param_decls, 1190 type_quals); 1191 } 1192 1193 // clang_type will get the function prototype clang type after this call 1194 clang_type = m_ast.CreateFunctionType (return_clang_type, 1195 function_param_types.data(), 1196 function_param_types.size(), 1197 is_variadic, 1198 type_quals); 1199 1200 bool ignore_containing_context = false; 1201 1202 if (type_name_cstr) 1203 { 1204 bool type_handled = false; 1205 if (tag == DW_TAG_subprogram || 1206 tag == DW_TAG_inlined_subroutine) 1207 { 1208 ObjCLanguage::MethodName objc_method (type_name_cstr, true); 1209 if (objc_method.IsValid(true)) 1210 { 1211 CompilerType class_opaque_type; 1212 ConstString class_name(objc_method.GetClassName()); 1213 if (class_name) 1214 { 1215 TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false)); 1216 1217 if (complete_objc_class_type_sp) 1218 { 1219 CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType (); 1220 if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type)) 1221 class_opaque_type = type_clang_forward_type; 1222 } 1223 } 1224 1225 if (class_opaque_type) 1226 { 1227 // If accessibility isn't set to anything valid, assume public for 1228 // now... 1229 if (accessibility == eAccessNone) 1230 accessibility = eAccessPublic; 1231 1232 clang::ObjCMethodDecl *objc_method_decl = m_ast.AddMethodToObjCObjectType (class_opaque_type, 1233 type_name_cstr, 1234 clang_type, 1235 accessibility, 1236 is_artificial); 1237 type_handled = objc_method_decl != NULL; 1238 if (type_handled) 1239 { 1240 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1241 m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID()); 1242 } 1243 else 1244 { 1245 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", 1246 die.GetOffset(), 1247 tag, 1248 DW_TAG_value_to_name(tag)); 1249 } 1250 } 1251 } 1252 else if (is_cxx_method) 1253 { 1254 // Look at the parent of this DIE and see if is is 1255 // a class or struct and see if this is actually a 1256 // C++ method 1257 Type *class_type = dwarf->ResolveType (decl_ctx_die); 1258 if (class_type) 1259 { 1260 bool alternate_defn = false; 1261 if (class_type->GetID() != decl_ctx_die.GetID() || decl_ctx_die.GetContainingDWOModuleDIE()) 1262 { 1263 alternate_defn = true; 1264 1265 // We uniqued the parent class of this function to another class 1266 // so we now need to associate all dies under "decl_ctx_die" to 1267 // DIEs in the DIE for "class_type"... 1268 SymbolFileDWARF *class_symfile = NULL; 1269 DWARFDIE class_type_die; 1270 1271 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1272 if (debug_map_symfile) 1273 { 1274 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID())); 1275 class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1276 } 1277 else 1278 { 1279 class_symfile = dwarf; 1280 class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1281 } 1282 if (class_type_die) 1283 { 1284 DWARFDIECollection failures; 1285 1286 CopyUniqueClassMethodTypes (decl_ctx_die, 1287 class_type_die, 1288 class_type, 1289 failures); 1290 1291 // FIXME do something with these failures that's smarter than 1292 // just dropping them on the ground. Unfortunately classes don't 1293 // like having stuff added to them after their definitions are 1294 // complete... 1295 1296 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1297 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1298 { 1299 type_sp = type_ptr->shared_from_this(); 1300 break; 1301 } 1302 } 1303 } 1304 1305 if (specification_die_form.IsValid()) 1306 { 1307 // We have a specification which we are going to base our function 1308 // prototype off of, so we need this type to be completed so that the 1309 // m_die_to_decl_ctx for the method in the specification has a valid 1310 // clang decl context. 1311 class_type->GetForwardCompilerType (); 1312 // If we have a specification, then the function type should have been 1313 // made with the specification and not with this die. 1314 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form)); 1315 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die); 1316 if (spec_clang_decl_ctx) 1317 { 1318 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1319 } 1320 else 1321 { 1322 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n", 1323 die.GetID(), 1324 specification_die_form.Reference()); 1325 } 1326 type_handled = true; 1327 } 1328 else if (abstract_origin_die_form.IsValid()) 1329 { 1330 // We have a specification which we are going to base our function 1331 // prototype off of, so we need this type to be completed so that the 1332 // m_die_to_decl_ctx for the method in the abstract origin has a valid 1333 // clang decl context. 1334 class_type->GetForwardCompilerType (); 1335 1336 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1337 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die); 1338 if (abs_clang_decl_ctx) 1339 { 1340 LinkDeclContextToDIE (abs_clang_decl_ctx, die); 1341 } 1342 else 1343 { 1344 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n", 1345 die.GetID(), 1346 abstract_origin_die_form.Reference()); 1347 } 1348 type_handled = true; 1349 } 1350 else 1351 { 1352 CompilerType class_opaque_type = class_type->GetForwardCompilerType (); 1353 if (ClangASTContext::IsCXXClassType(class_opaque_type)) 1354 { 1355 if (class_opaque_type.IsBeingDefined () || alternate_defn) 1356 { 1357 if (!is_static && !die.HasChildren()) 1358 { 1359 // We have a C++ member function with no children (this pointer!) 1360 // and clang will get mad if we try and make a function that isn't 1361 // well formed in the DWARF, so we will just skip it... 1362 type_handled = true; 1363 } 1364 else 1365 { 1366 bool add_method = true; 1367 if (alternate_defn) 1368 { 1369 // If an alternate definition for the class exists, then add the method only if an 1370 // equivalent is not already present. 1371 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(class_opaque_type.GetOpaqueQualType()); 1372 if (record_decl) 1373 { 1374 for (auto method_iter = record_decl->method_begin(); 1375 method_iter != record_decl->method_end(); 1376 method_iter++) 1377 { 1378 clang::CXXMethodDecl *method_decl = *method_iter; 1379 if (method_decl->getNameInfo().getAsString() == std::string(type_name_cstr)) 1380 { 1381 if (method_decl->getType() == ClangASTContext::GetQualType(clang_type)) 1382 { 1383 add_method = false; 1384 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(method_decl), die); 1385 type_handled = true; 1386 1387 break; 1388 } 1389 } 1390 } 1391 } 1392 } 1393 1394 if (add_method) 1395 { 1396 // REMOVE THE CRASH DESCRIPTION BELOW 1397 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1398 type_name_cstr, 1399 class_type->GetName().GetCString(), 1400 die.GetID(), 1401 dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str()); 1402 1403 const bool is_attr_used = false; 1404 // Neither GCC 4.2 nor clang++ currently set a valid accessibility 1405 // in the DWARF for C++ methods... Default to public for now... 1406 if (accessibility == eAccessNone) 1407 accessibility = eAccessPublic; 1408 1409 clang::CXXMethodDecl *cxx_method_decl; 1410 cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(), 1411 type_name_cstr, 1412 clang_type, 1413 accessibility, 1414 is_virtual, 1415 is_static, 1416 is_inline, 1417 is_explicit, 1418 is_attr_used, 1419 is_artificial); 1420 1421 type_handled = cxx_method_decl != NULL; 1422 1423 if (type_handled) 1424 { 1425 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die); 1426 1427 Host::SetCrashDescription (NULL); 1428 1429 ClangASTMetadata metadata; 1430 metadata.SetUserID(die.GetID()); 1431 1432 if (!object_pointer_name.empty()) 1433 { 1434 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1435 if (log) 1436 log->Printf ("Setting object pointer name: %s on method object %p.\n", 1437 object_pointer_name.c_str(), 1438 static_cast<void*>(cxx_method_decl)); 1439 } 1440 m_ast.SetMetadata (cxx_method_decl, metadata); 1441 } 1442 else 1443 { 1444 ignore_containing_context = true; 1445 } 1446 } 1447 } 1448 } 1449 else 1450 { 1451 // We were asked to parse the type for a method in a class, yet the 1452 // class hasn't been asked to complete itself through the 1453 // clang::ExternalASTSource protocol, so we need to just have the 1454 // class complete itself and do things the right way, then our 1455 // DIE should then have an entry in the dwarf->GetDIEToType() map. First 1456 // we need to modify the dwarf->GetDIEToType() so it doesn't think we are 1457 // trying to parse this DIE anymore... 1458 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1459 1460 // Now we get the full type to force our class type to complete itself 1461 // using the clang::ExternalASTSource protocol which will parse all 1462 // base classes and all methods (including the method for this DIE). 1463 class_type->GetFullCompilerType (); 1464 1465 // The type for this DIE should have been filled in the function call above 1466 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1467 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1468 { 1469 type_sp = type_ptr->shared_from_this(); 1470 break; 1471 } 1472 1473 // FIXME This is fixing some even uglier behavior but we really need to 1474 // uniq the methods of each class as well as the class itself. 1475 // <rdar://problem/11240464> 1476 type_handled = true; 1477 } 1478 } 1479 } 1480 } 1481 } 1482 } 1483 1484 if (!type_handled) 1485 { 1486 // We just have a function that isn't part of a class 1487 clang::FunctionDecl *function_decl = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx, 1488 type_name_cstr, 1489 clang_type, 1490 storage, 1491 is_inline); 1492 1493 // if (template_param_infos.GetSize() > 0) 1494 // { 1495 // clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx, 1496 // function_decl, 1497 // type_name_cstr, 1498 // template_param_infos); 1499 // 1500 // CreateFunctionTemplateSpecializationInfo (function_decl, 1501 // func_template_decl, 1502 // template_param_infos); 1503 // } 1504 // Add the decl to our DIE to decl context map 1505 assert (function_decl); 1506 LinkDeclContextToDIE(function_decl, die); 1507 if (!function_param_decls.empty()) 1508 m_ast.SetFunctionParameters (function_decl, 1509 &function_param_decls.front(), 1510 function_param_decls.size()); 1511 1512 ClangASTMetadata metadata; 1513 metadata.SetUserID(die.GetID()); 1514 1515 if (!object_pointer_name.empty()) 1516 { 1517 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1518 if (log) 1519 log->Printf ("Setting object pointer name: %s on function object %p.", 1520 object_pointer_name.c_str(), 1521 static_cast<void*>(function_decl)); 1522 } 1523 m_ast.SetMetadata (function_decl, metadata); 1524 } 1525 } 1526 type_sp.reset( new Type (die.GetID(), 1527 dwarf, 1528 type_name_const_str, 1529 0, 1530 NULL, 1531 LLDB_INVALID_UID, 1532 Type::eEncodingIsUID, 1533 &decl, 1534 clang_type, 1535 Type::eResolveStateFull)); 1536 assert(type_sp.get()); 1537 } 1538 break; 1539 1540 case DW_TAG_array_type: 1541 { 1542 // Set a bit that lets us know that we are currently parsing this 1543 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1544 1545 DWARFFormValue type_die_form; 1546 int64_t first_index = 0; 1547 uint32_t byte_stride = 0; 1548 uint32_t bit_stride = 0; 1549 bool is_vector = false; 1550 const size_t num_attributes = die.GetAttributes (attributes); 1551 1552 if (num_attributes > 0) 1553 { 1554 uint32_t i; 1555 for (i=0; i<num_attributes; ++i) 1556 { 1557 attr = attributes.AttributeAtIndex(i); 1558 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1559 { 1560 switch (attr) 1561 { 1562 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1563 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1564 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1565 case DW_AT_name: 1566 type_name_cstr = form_value.AsCString(); 1567 type_name_const_str.SetCString(type_name_cstr); 1568 break; 1569 1570 case DW_AT_type: type_die_form = form_value; break; 1571 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break; 1572 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break; 1573 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break; 1574 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break; 1575 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1576 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1577 case DW_AT_allocated: 1578 case DW_AT_associated: 1579 case DW_AT_data_location: 1580 case DW_AT_description: 1581 case DW_AT_ordering: 1582 case DW_AT_start_scope: 1583 case DW_AT_visibility: 1584 case DW_AT_specification: 1585 case DW_AT_abstract_origin: 1586 case DW_AT_sibling: 1587 break; 1588 } 1589 } 1590 } 1591 1592 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1593 1594 Type *element_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1595 1596 if (element_type) 1597 { 1598 std::vector<uint64_t> element_orders; 1599 ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride); 1600 if (byte_stride == 0 && bit_stride == 0) 1601 byte_stride = element_type->GetByteSize(); 1602 CompilerType array_element_type = element_type->GetForwardCompilerType (); 1603 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1604 if (element_orders.size() > 0) 1605 { 1606 uint64_t num_elements = 0; 1607 std::vector<uint64_t>::const_reverse_iterator pos; 1608 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend(); 1609 for (pos = element_orders.rbegin(); pos != end; ++pos) 1610 { 1611 num_elements = *pos; 1612 clang_type = m_ast.CreateArrayType (array_element_type, 1613 num_elements, 1614 is_vector); 1615 array_element_type = clang_type; 1616 array_element_bit_stride = num_elements ? 1617 array_element_bit_stride * num_elements : 1618 array_element_bit_stride; 1619 } 1620 } 1621 else 1622 { 1623 clang_type = m_ast.CreateArrayType (array_element_type, 0, is_vector); 1624 } 1625 ConstString empty_name; 1626 type_sp.reset( new Type (die.GetID(), 1627 dwarf, 1628 empty_name, 1629 array_element_bit_stride / 8, 1630 NULL, 1631 DIERef(type_die_form).GetUID(), 1632 Type::eEncodingIsUID, 1633 &decl, 1634 clang_type, 1635 Type::eResolveStateFull)); 1636 type_sp->SetEncodingType (element_type); 1637 } 1638 } 1639 } 1640 break; 1641 1642 case DW_TAG_ptr_to_member_type: 1643 { 1644 DWARFFormValue type_die_form; 1645 DWARFFormValue containing_type_die_form; 1646 1647 const size_t num_attributes = die.GetAttributes (attributes); 1648 1649 if (num_attributes > 0) { 1650 uint32_t i; 1651 for (i=0; i<num_attributes; ++i) 1652 { 1653 attr = attributes.AttributeAtIndex(i); 1654 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1655 { 1656 switch (attr) 1657 { 1658 case DW_AT_type: 1659 type_die_form = form_value; break; 1660 case DW_AT_containing_type: 1661 containing_type_die_form = form_value; break; 1662 } 1663 } 1664 } 1665 1666 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1667 Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form).GetUID()); 1668 1669 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType (); 1670 CompilerType class_clang_type = class_type->GetLayoutCompilerType (); 1671 1672 clang_type = ClangASTContext::CreateMemberPointerType(class_clang_type, pointee_clang_type); 1673 1674 byte_size = clang_type.GetByteSize(nullptr); 1675 1676 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1677 LLDB_INVALID_UID, Type::eEncodingIsUID, NULL, clang_type, 1678 Type::eResolveStateForward)); 1679 } 1680 1681 break; 1682 } 1683 default: 1684 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", 1685 die.GetOffset(), 1686 tag, 1687 DW_TAG_value_to_name(tag)); 1688 break; 1689 } 1690 1691 if (type_sp.get()) 1692 { 1693 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1694 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1695 1696 SymbolContextScope * symbol_context_scope = NULL; 1697 if (sc_parent_tag == DW_TAG_compile_unit) 1698 { 1699 symbol_context_scope = sc.comp_unit; 1700 } 1701 else if (sc.function != NULL && sc_parent_die) 1702 { 1703 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1704 if (symbol_context_scope == NULL) 1705 symbol_context_scope = sc.function; 1706 } 1707 1708 if (symbol_context_scope != NULL) 1709 { 1710 type_sp->SetSymbolContextScope(symbol_context_scope); 1711 } 1712 1713 // We are ready to put this type into the uniqued list up at the module level 1714 type_list->Insert (type_sp); 1715 1716 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1717 } 1718 } 1719 else if (type_ptr != DIE_IS_BEING_PARSED) 1720 { 1721 type_sp = type_ptr->shared_from_this(); 1722 } 1723 } 1724 return type_sp; 1725} 1726 1727// DWARF parsing functions 1728 1729class DWARFASTParserClang::DelayedAddObjCClassProperty 1730{ 1731public: 1732 DelayedAddObjCClassProperty(const CompilerType &class_opaque_type, 1733 const char *property_name, 1734 const CompilerType &property_opaque_type, // The property type is only required if you don't have an ivar decl 1735 clang::ObjCIvarDecl *ivar_decl, 1736 const char *property_setter_name, 1737 const char *property_getter_name, 1738 uint32_t property_attributes, 1739 const ClangASTMetadata *metadata) : 1740 m_class_opaque_type (class_opaque_type), 1741 m_property_name (property_name), 1742 m_property_opaque_type (property_opaque_type), 1743 m_ivar_decl (ivar_decl), 1744 m_property_setter_name (property_setter_name), 1745 m_property_getter_name (property_getter_name), 1746 m_property_attributes (property_attributes) 1747 { 1748 if (metadata != NULL) 1749 { 1750 m_metadata_ap.reset(new ClangASTMetadata()); 1751 *m_metadata_ap = *metadata; 1752 } 1753 } 1754 1755 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs) 1756 { 1757 *this = rhs; 1758 } 1759 1760 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs) 1761 { 1762 m_class_opaque_type = rhs.m_class_opaque_type; 1763 m_property_name = rhs.m_property_name; 1764 m_property_opaque_type = rhs.m_property_opaque_type; 1765 m_ivar_decl = rhs.m_ivar_decl; 1766 m_property_setter_name = rhs.m_property_setter_name; 1767 m_property_getter_name = rhs.m_property_getter_name; 1768 m_property_attributes = rhs.m_property_attributes; 1769 1770 if (rhs.m_metadata_ap.get()) 1771 { 1772 m_metadata_ap.reset (new ClangASTMetadata()); 1773 *m_metadata_ap = *rhs.m_metadata_ap; 1774 } 1775 return *this; 1776 } 1777 1778 bool 1779 Finalize() 1780 { 1781 return ClangASTContext::AddObjCClassProperty (m_class_opaque_type, 1782 m_property_name, 1783 m_property_opaque_type, 1784 m_ivar_decl, 1785 m_property_setter_name, 1786 m_property_getter_name, 1787 m_property_attributes, 1788 m_metadata_ap.get()); 1789 } 1790 1791private: 1792 CompilerType m_class_opaque_type; 1793 const char *m_property_name; 1794 CompilerType m_property_opaque_type; 1795 clang::ObjCIvarDecl *m_ivar_decl; 1796 const char *m_property_setter_name; 1797 const char *m_property_getter_name; 1798 uint32_t m_property_attributes; 1799 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1800}; 1801 1802bool 1803DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &die, 1804 ClangASTContext::TemplateParameterInfos &template_param_infos) 1805{ 1806 const dw_tag_t tag = die.Tag(); 1807 1808 switch (tag) 1809 { 1810 case DW_TAG_template_type_parameter: 1811 case DW_TAG_template_value_parameter: 1812 { 1813 DWARFAttributes attributes; 1814 const size_t num_attributes = die.GetAttributes (attributes); 1815 const char *name = NULL; 1816 Type *lldb_type = NULL; 1817 CompilerType clang_type; 1818 uint64_t uval64 = 0; 1819 bool uval64_valid = false; 1820 if (num_attributes > 0) 1821 { 1822 DWARFFormValue form_value; 1823 for (size_t i=0; i<num_attributes; ++i) 1824 { 1825 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1826 1827 switch (attr) 1828 { 1829 case DW_AT_name: 1830 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1831 name = form_value.AsCString(); 1832 break; 1833 1834 case DW_AT_type: 1835 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1836 { 1837 lldb_type = die.ResolveTypeUID(DIERef(form_value).GetUID()); 1838 if (lldb_type) 1839 clang_type = lldb_type->GetForwardCompilerType (); 1840 } 1841 break; 1842 1843 case DW_AT_const_value: 1844 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1845 { 1846 uval64_valid = true; 1847 uval64 = form_value.Unsigned(); 1848 } 1849 break; 1850 default: 1851 break; 1852 } 1853 } 1854 1855 clang::ASTContext *ast = m_ast.getASTContext(); 1856 if (!clang_type) 1857 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1858 1859 if (clang_type) 1860 { 1861 bool is_signed = false; 1862 if (name && name[0]) 1863 template_param_infos.names.push_back(name); 1864 else 1865 template_param_infos.names.push_back(NULL); 1866 1867 if (tag == DW_TAG_template_value_parameter && 1868 lldb_type != NULL && 1869 clang_type.IsIntegerType (is_signed) && 1870 uval64_valid) 1871 { 1872 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed); 1873 template_param_infos.args.push_back (clang::TemplateArgument (*ast, 1874 llvm::APSInt(apint), 1875 ClangASTContext::GetQualType(clang_type))); 1876 } 1877 else 1878 { 1879 template_param_infos.args.push_back (clang::TemplateArgument (ClangASTContext::GetQualType(clang_type))); 1880 } 1881 } 1882 else 1883 { 1884 return false; 1885 } 1886 1887 } 1888 } 1889 return true; 1890 1891 default: 1892 break; 1893 } 1894 return false; 1895} 1896 1897bool 1898DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die, 1899 ClangASTContext::TemplateParameterInfos &template_param_infos) 1900{ 1901 1902 if (!parent_die) 1903 return false; 1904 1905 Args template_parameter_names; 1906 for (DWARFDIE die = parent_die.GetFirstChild(); 1907 die.IsValid(); 1908 die = die.GetSibling()) 1909 { 1910 const dw_tag_t tag = die.Tag(); 1911 1912 switch (tag) 1913 { 1914 case DW_TAG_template_type_parameter: 1915 case DW_TAG_template_value_parameter: 1916 ParseTemplateDIE (die, template_param_infos); 1917 break; 1918 1919 default: 1920 break; 1921 } 1922 } 1923 if (template_param_infos.args.empty()) 1924 return false; 1925 return template_param_infos.args.size() == template_param_infos.names.size(); 1926} 1927 1928bool 1929DWARFASTParserClang::CanCompleteType (const lldb_private::CompilerType &compiler_type) 1930{ 1931 if (m_clang_ast_importer_ap) 1932 return ClangASTContext::CanImport(compiler_type, GetClangASTImporter()); 1933 else 1934 return false; 1935} 1936 1937bool 1938DWARFASTParserClang::CompleteType (const lldb_private::CompilerType &compiler_type) 1939{ 1940 if (CanCompleteType(compiler_type)) 1941 { 1942 if (ClangASTContext::Import(compiler_type, GetClangASTImporter())) 1943 { 1944 ClangASTContext::CompleteTagDeclarationDefinition(compiler_type); 1945 return true; 1946 } 1947 else 1948 { 1949 ClangASTContext::SetHasExternalStorage (compiler_type.GetOpaqueQualType(), false); 1950 } 1951 } 1952 return false; 1953} 1954 1955bool 1956DWARFASTParserClang::CompleteTypeFromDWARF (const DWARFDIE &die, 1957 lldb_private::Type *type, 1958 CompilerType &clang_type) 1959{ 1960 // Disable external storage for this type so we don't get anymore 1961 // clang::ExternalASTSource queries for this type. 1962 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false); 1963 1964 if (!die) 1965 return false; 1966 1967 const dw_tag_t tag = die.Tag(); 1968 1969 SymbolFileDWARF *dwarf = die.GetDWARF(); 1970 1971 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 1972 if (log) 1973 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, 1974 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 1975 die.GetID(), 1976 die.GetTagAsCString(), 1977 type->GetName().AsCString()); 1978 assert (clang_type); 1979 DWARFAttributes attributes; 1980 switch (tag) 1981 { 1982 case DW_TAG_structure_type: 1983 case DW_TAG_union_type: 1984 case DW_TAG_class_type: 1985 { 1986 LayoutInfo layout_info; 1987 1988 { 1989 if (die.HasChildren()) 1990 { 1991 LanguageType class_language = eLanguageTypeUnknown; 1992 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) 1993 { 1994 class_language = eLanguageTypeObjC; 1995 // For objective C we don't start the definition when 1996 // the class is created. 1997 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1998 } 1999 2000 int tag_decl_kind = -1; 2001 AccessType default_accessibility = eAccessNone; 2002 if (tag == DW_TAG_structure_type) 2003 { 2004 tag_decl_kind = clang::TTK_Struct; 2005 default_accessibility = eAccessPublic; 2006 } 2007 else if (tag == DW_TAG_union_type) 2008 { 2009 tag_decl_kind = clang::TTK_Union; 2010 default_accessibility = eAccessPublic; 2011 } 2012 else if (tag == DW_TAG_class_type) 2013 { 2014 tag_decl_kind = clang::TTK_Class; 2015 default_accessibility = eAccessPrivate; 2016 } 2017 2018 SymbolContext sc(die.GetLLDBCompileUnit()); 2019 std::vector<clang::CXXBaseSpecifier *> base_classes; 2020 std::vector<int> member_accessibilities; 2021 bool is_a_class = false; 2022 // Parse members and base classes first 2023 DWARFDIECollection member_function_dies; 2024 2025 DelayedPropertyList delayed_properties; 2026 ParseChildMembers (sc, 2027 die, 2028 clang_type, 2029 class_language, 2030 base_classes, 2031 member_accessibilities, 2032 member_function_dies, 2033 delayed_properties, 2034 default_accessibility, 2035 is_a_class, 2036 layout_info); 2037 2038 // Now parse any methods if there were any... 2039 size_t num_functions = member_function_dies.Size(); 2040 if (num_functions > 0) 2041 { 2042 for (size_t i=0; i<num_functions; ++i) 2043 { 2044 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2045 } 2046 } 2047 2048 if (class_language == eLanguageTypeObjC) 2049 { 2050 ConstString class_name (clang_type.GetTypeName()); 2051 if (class_name) 2052 { 2053 DIEArray method_die_offsets; 2054 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2055 2056 if (!method_die_offsets.empty()) 2057 { 2058 DWARFDebugInfo* debug_info = dwarf->DebugInfo(); 2059 2060 const size_t num_matches = method_die_offsets.size(); 2061 for (size_t i=0; i<num_matches; ++i) 2062 { 2063 const DIERef& die_ref = method_die_offsets[i]; 2064 DWARFDIE method_die = debug_info->GetDIE (die_ref); 2065 2066 if (method_die) 2067 method_die.ResolveType (); 2068 } 2069 } 2070 2071 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end(); 2072 pi != pe; 2073 ++pi) 2074 pi->Finalize(); 2075 } 2076 } 2077 2078 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2079 // need to tell the clang type it is actually a class. 2080 if (class_language != eLanguageTypeObjC) 2081 { 2082 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2083 m_ast.SetTagTypeKind (ClangASTContext::GetQualType(clang_type), clang::TTK_Class); 2084 } 2085 2086 // Since DW_TAG_structure_type gets used for both classes 2087 // and structures, we may need to set any DW_TAG_member 2088 // fields to have a "private" access if none was specified. 2089 // When we parsed the child members we tracked that actual 2090 // accessibility value for each DW_TAG_member in the 2091 // "member_accessibilities" array. If the value for the 2092 // member is zero, then it was set to the "default_accessibility" 2093 // which for structs was "public". Below we correct this 2094 // by setting any fields to "private" that weren't correctly 2095 // set. 2096 if (is_a_class && !member_accessibilities.empty()) 2097 { 2098 // This is a class and all members that didn't have 2099 // their access specified are private. 2100 m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type), 2101 eAccessPrivate, 2102 &member_accessibilities.front(), 2103 member_accessibilities.size()); 2104 } 2105 2106 if (!base_classes.empty()) 2107 { 2108 // Make sure all base classes refer to complete types and not 2109 // forward declarations. If we don't do this, clang will crash 2110 // with an assertion in the call to clang_type.SetBaseClassesForClassType() 2111 for (auto &base_class : base_classes) 2112 { 2113 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo(); 2114 if (type_source_info) 2115 { 2116 CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr()); 2117 if (base_class_type.GetCompleteType() == false) 2118 { 2119 auto module = dwarf->GetObjectFile()->GetModule(); 2120 module->ReportError ( 2121 ":: Class '%s' has a base class '%s' which does not have a complete definition.", 2122 die.GetName(), 2123 base_class_type.GetTypeName().GetCString()); 2124 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2125 module->ReportError (":: Try compiling the source file with -fno-limit-debug-info."); 2126 2127 // We have no choice other than to pretend that the base class 2128 // is complete. If we don't do this, clang will crash when we 2129 // call setBases() inside of "clang_type.SetBaseClassesForClassType()" 2130 // below. Since we provide layout assistance, all ivars in this 2131 // class and other classes will be fine, this is the best we can do 2132 // short of crashing. 2133 ClangASTContext::StartTagDeclarationDefinition (base_class_type); 2134 ClangASTContext::CompleteTagDeclarationDefinition (base_class_type); 2135 } 2136 } 2137 } 2138 m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(), 2139 &base_classes.front(), 2140 base_classes.size()); 2141 2142 // Clang will copy each CXXBaseSpecifier in "base_classes" 2143 // so we have to free them all. 2144 ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(), 2145 base_classes.size()); 2146 } 2147 } 2148 } 2149 2150 ClangASTContext::BuildIndirectFields (clang_type); 2151 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2152 2153 if (!layout_info.field_offsets.empty() || 2154 !layout_info.base_offsets.empty() || 2155 !layout_info.vbase_offsets.empty() ) 2156 { 2157 if (type) 2158 layout_info.bit_size = type->GetByteSize() * 8; 2159 if (layout_info.bit_size == 0) 2160 layout_info.bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2161 2162 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2163 if (record_decl) 2164 { 2165 if (log) 2166 { 2167 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2168 2169 if (module_sp) 2170 { 2171 module_sp->LogMessage (log, 2172 "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])", 2173 static_cast<void*>(clang_type.GetOpaqueQualType()), 2174 static_cast<void*>(record_decl), 2175 layout_info.bit_size, 2176 layout_info.alignment, 2177 static_cast<uint32_t>(layout_info.field_offsets.size()), 2178 static_cast<uint32_t>(layout_info.base_offsets.size()), 2179 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2180 2181 uint32_t idx; 2182 { 2183 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos, 2184 end = layout_info.field_offsets.end(); 2185 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx) 2186 { 2187 module_sp->LogMessage(log, 2188 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }", 2189 static_cast<void *>(clang_type.GetOpaqueQualType()), 2190 idx, 2191 static_cast<uint32_t>(pos->second), 2192 pos->first->getNameAsString().c_str()); 2193 } 2194 } 2195 2196 { 2197 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, 2198 base_end = layout_info.base_offsets.end(); 2199 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx) 2200 { 2201 module_sp->LogMessage(log, 2202 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }", 2203 clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(), 2204 base_pos->first->getNameAsString().c_str()); 2205 } 2206 } 2207 { 2208 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, 2209 vbase_end = layout_info.vbase_offsets.end(); 2210 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx) 2211 { 2212 module_sp->LogMessage(log, 2213 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }", 2214 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2215 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2216 vbase_pos->first->getNameAsString().c_str()); 2217 } 2218 } 2219 2220 } 2221 } 2222 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info)); 2223 } 2224 } 2225 } 2226 2227 return (bool)clang_type; 2228 2229 case DW_TAG_enumeration_type: 2230 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2231 if (die.HasChildren()) 2232 { 2233 SymbolContext sc(die.GetLLDBCompileUnit()); 2234 bool is_signed = false; 2235 clang_type.IsIntegerType(is_signed); 2236 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die); 2237 } 2238 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2239 return (bool)clang_type; 2240 2241 default: 2242 assert(false && "not a forward clang type decl!"); 2243 break; 2244 } 2245 2246 return false; 2247} 2248 2249std::vector<DWARFDIE> 2250DWARFASTParserClang::GetDIEForDeclContext(lldb_private::CompilerDeclContext decl_context) 2251{ 2252 std::vector<DWARFDIE> result; 2253 for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++) 2254 result.push_back(it->second); 2255 return result; 2256} 2257 2258CompilerDecl 2259DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die) 2260{ 2261 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2262 if (clang_decl != nullptr) 2263 return CompilerDecl(&m_ast, clang_decl); 2264 return CompilerDecl(); 2265} 2266 2267CompilerDeclContext 2268DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die) 2269{ 2270 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die); 2271 if (clang_decl_ctx) 2272 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2273 return CompilerDeclContext(); 2274} 2275 2276CompilerDeclContext 2277DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die) 2278{ 2279 clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 2280 if (clang_decl_ctx) 2281 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2282 return CompilerDeclContext(); 2283} 2284 2285size_t 2286DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc, 2287 lldb_private::CompilerType &clang_type, 2288 bool is_signed, 2289 uint32_t enumerator_byte_size, 2290 const DWARFDIE &parent_die) 2291{ 2292 if (!parent_die) 2293 return 0; 2294 2295 size_t enumerators_added = 0; 2296 2297 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2298 { 2299 const dw_tag_t tag = die.Tag(); 2300 if (tag == DW_TAG_enumerator) 2301 { 2302 DWARFAttributes attributes; 2303 const size_t num_child_attributes = die.GetAttributes(attributes); 2304 if (num_child_attributes > 0) 2305 { 2306 const char *name = NULL; 2307 bool got_value = false; 2308 int64_t enum_value = 0; 2309 Declaration decl; 2310 2311 uint32_t i; 2312 for (i=0; i<num_child_attributes; ++i) 2313 { 2314 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2315 DWARFFormValue form_value; 2316 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2317 { 2318 switch (attr) 2319 { 2320 case DW_AT_const_value: 2321 got_value = true; 2322 if (is_signed) 2323 enum_value = form_value.Signed(); 2324 else 2325 enum_value = form_value.Unsigned(); 2326 break; 2327 2328 case DW_AT_name: 2329 name = form_value.AsCString(); 2330 break; 2331 2332 case DW_AT_description: 2333 default: 2334 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2335 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2336 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2337 case DW_AT_sibling: 2338 break; 2339 } 2340 } 2341 } 2342 2343 if (name && name[0] && got_value) 2344 { 2345 m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(), 2346 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2347 decl, 2348 name, 2349 enum_value, 2350 enumerator_byte_size * 8); 2351 ++enumerators_added; 2352 } 2353 } 2354 } 2355 } 2356 return enumerators_added; 2357} 2358 2359#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2360 2361class DIEStack 2362{ 2363public: 2364 2365 void Push (const DWARFDIE &die) 2366 { 2367 m_dies.push_back (die); 2368 } 2369 2370 2371 void LogDIEs (Log *log) 2372 { 2373 StreamString log_strm; 2374 const size_t n = m_dies.size(); 2375 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2376 for (size_t i=0; i<n; i++) 2377 { 2378 std::string qualified_name; 2379 const DWARFDIE &die = m_dies[i]; 2380 die.GetQualifiedName(qualified_name); 2381 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", 2382 (uint64_t)i, 2383 die.GetOffset(), 2384 die.GetTagAsCString(), 2385 qualified_name.c_str()); 2386 } 2387 log->PutCString(log_strm.GetData()); 2388 } 2389 void Pop () 2390 { 2391 m_dies.pop_back(); 2392 } 2393 2394 class ScopedPopper 2395 { 2396 public: 2397 ScopedPopper (DIEStack &die_stack) : 2398 m_die_stack (die_stack), 2399 m_valid (false) 2400 { 2401 } 2402 2403 void 2404 Push (const DWARFDIE &die) 2405 { 2406 m_valid = true; 2407 m_die_stack.Push (die); 2408 } 2409 2410 ~ScopedPopper () 2411 { 2412 if (m_valid) 2413 m_die_stack.Pop(); 2414 } 2415 2416 2417 2418 protected: 2419 DIEStack &m_die_stack; 2420 bool m_valid; 2421 }; 2422 2423protected: 2424 typedef std::vector<DWARFDIE> Stack; 2425 Stack m_dies; 2426}; 2427#endif 2428 2429Function * 2430DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc, 2431 const DWARFDIE &die) 2432{ 2433 DWARFRangeList func_ranges; 2434 const char *name = NULL; 2435 const char *mangled = NULL; 2436 int decl_file = 0; 2437 int decl_line = 0; 2438 int decl_column = 0; 2439 int call_file = 0; 2440 int call_line = 0; 2441 int call_column = 0; 2442 DWARFExpression frame_base(die.GetCU()); 2443 2444 const dw_tag_t tag = die.Tag(); 2445 2446 if (tag != DW_TAG_subprogram) 2447 return NULL; 2448 2449 if (die.GetDIENamesAndRanges (name, 2450 mangled, 2451 func_ranges, 2452 decl_file, 2453 decl_line, 2454 decl_column, 2455 call_file, 2456 call_line, 2457 call_column, 2458 &frame_base)) 2459 { 2460 2461 // Union of all ranges in the function DIE (if the function is discontiguous) 2462 AddressRange func_range; 2463 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0); 2464 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0); 2465 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr) 2466 { 2467 ModuleSP module_sp (die.GetModule()); 2468 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList()); 2469 if (func_range.GetBaseAddress().IsValid()) 2470 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2471 } 2472 2473 if (func_range.GetBaseAddress().IsValid()) 2474 { 2475 Mangled func_name; 2476 if (mangled) 2477 func_name.SetValue(ConstString(mangled), true); 2478 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2479 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2480 name && strcmp(name, "main") != 0) 2481 { 2482 // If the mangled name is not present in the DWARF, generate the demangled name 2483 // using the decl context. We skip if the function is "main" as its name is 2484 // never mangled. 2485 bool is_static = false; 2486 bool is_variadic = false; 2487 unsigned type_quals = 0; 2488 std::vector<CompilerType> param_types; 2489 std::vector<clang::ParmVarDecl*> param_decls; 2490 DWARFDeclContext decl_ctx; 2491 StreamString sstr; 2492 2493 die.GetDWARFDeclContext(decl_ctx); 2494 sstr << decl_ctx.GetQualifiedName(); 2495 2496 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr); 2497 ParseChildParameters(sc, 2498 containing_decl_ctx, 2499 die, 2500 true, 2501 is_static, 2502 is_variadic, 2503 param_types, 2504 param_decls, 2505 type_quals); 2506 sstr << "("; 2507 for (size_t i = 0; i < param_types.size(); i++) 2508 { 2509 if (i > 0) 2510 sstr << ", "; 2511 sstr << param_types[i].GetTypeName(); 2512 } 2513 if (is_variadic) 2514 sstr << ", ..."; 2515 sstr << ")"; 2516 if (type_quals & clang::Qualifiers::Const) 2517 sstr << " const"; 2518 2519 func_name.SetValue(ConstString(sstr.GetData()), false); 2520 } 2521 else 2522 func_name.SetValue(ConstString(name), false); 2523 2524 FunctionSP func_sp; 2525 std::unique_ptr<Declaration> decl_ap; 2526 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2527 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2528 decl_line, 2529 decl_column)); 2530 2531 SymbolFileDWARF *dwarf = die.GetDWARF(); 2532 // Supply the type _only_ if it has already been parsed 2533 Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE()); 2534 2535 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2536 2537 if (dwarf->FixupAddress (func_range.GetBaseAddress())) 2538 { 2539 const user_id_t func_user_id = die.GetID(); 2540 func_sp.reset(new Function (sc.comp_unit, 2541 func_user_id, // UserID is the DIE offset 2542 func_user_id, 2543 func_name, 2544 func_type, 2545 func_range)); // first address range 2546 2547 if (func_sp.get() != NULL) 2548 { 2549 if (frame_base.IsValid()) 2550 func_sp->GetFrameBaseExpression() = frame_base; 2551 sc.comp_unit->AddFunction(func_sp); 2552 return func_sp.get(); 2553 } 2554 } 2555 } 2556 } 2557 return NULL; 2558} 2559 2560 2561bool 2562DWARFASTParserClang::ParseChildMembers (const SymbolContext& sc, 2563 const DWARFDIE &parent_die, 2564 CompilerType &class_clang_type, 2565 const LanguageType class_language, 2566 std::vector<clang::CXXBaseSpecifier *>& base_classes, 2567 std::vector<int>& member_accessibilities, 2568 DWARFDIECollection& member_function_dies, 2569 DelayedPropertyList& delayed_properties, 2570 AccessType& default_accessibility, 2571 bool &is_a_class, 2572 LayoutInfo &layout_info) 2573{ 2574 if (!parent_die) 2575 return 0; 2576 2577 uint32_t member_idx = 0; 2578 BitfieldInfo last_field_info; 2579 2580 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2581 ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2582 if (ast == nullptr) 2583 return 0; 2584 2585 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2586 { 2587 dw_tag_t tag = die.Tag(); 2588 2589 switch (tag) 2590 { 2591 case DW_TAG_member: 2592 case DW_TAG_APPLE_property: 2593 { 2594 DWARFAttributes attributes; 2595 const size_t num_attributes = die.GetAttributes (attributes); 2596 if (num_attributes > 0) 2597 { 2598 Declaration decl; 2599 //DWARFExpression location; 2600 const char *name = NULL; 2601 const char *prop_name = NULL; 2602 const char *prop_getter_name = NULL; 2603 const char *prop_setter_name = NULL; 2604 uint32_t prop_attributes = 0; 2605 2606 2607 bool is_artificial = false; 2608 DWARFFormValue encoding_form; 2609 AccessType accessibility = eAccessNone; 2610 uint32_t member_byte_offset = UINT32_MAX; 2611 size_t byte_size = 0; 2612 size_t bit_offset = 0; 2613 size_t bit_size = 0; 2614 bool is_external = false; // On DW_TAG_members, this means the member is static 2615 uint32_t i; 2616 for (i=0; i<num_attributes && !is_artificial; ++i) 2617 { 2618 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2619 DWARFFormValue form_value; 2620 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2621 { 2622 switch (attr) 2623 { 2624 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2625 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2626 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2627 case DW_AT_name: name = form_value.AsCString(); break; 2628 case DW_AT_type: encoding_form = form_value; break; 2629 case DW_AT_bit_offset: bit_offset = form_value.Unsigned(); break; 2630 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break; 2631 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 2632 case DW_AT_data_member_location: 2633 if (form_value.BlockData()) 2634 { 2635 Value initialValue(0); 2636 Value memberOffset(0); 2637 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2638 uint32_t block_length = form_value.Unsigned(); 2639 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2640 if (DWARFExpression::Evaluate(NULL, // ExecutionContext * 2641 NULL, // ClangExpressionVariableList * 2642 NULL, // ClangExpressionDeclMap * 2643 NULL, // RegisterContext * 2644 module_sp, 2645 debug_info_data, 2646 die.GetCU(), 2647 block_offset, 2648 block_length, 2649 eRegisterKindDWARF, 2650 &initialValue, 2651 memberOffset, 2652 NULL)) 2653 { 2654 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2655 } 2656 } 2657 else 2658 { 2659 // With DWARF 3 and later, if the value is an integer constant, 2660 // this form value is the offset in bytes from the beginning 2661 // of the containing entity. 2662 member_byte_offset = form_value.Unsigned(); 2663 } 2664 break; 2665 2666 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break; 2667 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2668 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(); 2669 break; 2670 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(); 2671 break; 2672 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(); 2673 break; 2674 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break; 2675 case DW_AT_external: is_external = form_value.Boolean(); break; 2676 2677 default: 2678 case DW_AT_declaration: 2679 case DW_AT_description: 2680 case DW_AT_mutable: 2681 case DW_AT_visibility: 2682 case DW_AT_sibling: 2683 break; 2684 } 2685 } 2686 } 2687 2688 if (prop_name) 2689 { 2690 ConstString fixed_getter; 2691 ConstString fixed_setter; 2692 2693 // Check if the property getter/setter were provided as full 2694 // names. We want basenames, so we extract them. 2695 2696 if (prop_getter_name && prop_getter_name[0] == '-') 2697 { 2698 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2699 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2700 } 2701 2702 if (prop_setter_name && prop_setter_name[0] == '-') 2703 { 2704 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2705 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2706 } 2707 2708 // If the names haven't been provided, they need to be 2709 // filled in. 2710 2711 if (!prop_getter_name) 2712 { 2713 prop_getter_name = prop_name; 2714 } 2715 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly)) 2716 { 2717 StreamString ss; 2718 2719 ss.Printf("set%c%s:", 2720 toupper(prop_name[0]), 2721 &prop_name[1]); 2722 2723 fixed_setter.SetCString(ss.GetData()); 2724 prop_setter_name = fixed_setter.GetCString(); 2725 } 2726 } 2727 2728 // Clang has a DWARF generation bug where sometimes it 2729 // represents fields that are references with bad byte size 2730 // and bit size/offset information such as: 2731 // 2732 // DW_AT_byte_size( 0x00 ) 2733 // DW_AT_bit_size( 0x40 ) 2734 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2735 // 2736 // So check the bit offset to make sure it is sane, and if 2737 // the values are not sane, remove them. If we don't do this 2738 // then we will end up with a crash if we try to use this 2739 // type in an expression when clang becomes unhappy with its 2740 // recycled debug info. 2741 2742 if (bit_offset > 128) 2743 { 2744 bit_size = 0; 2745 bit_offset = 0; 2746 } 2747 2748 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2749 if (class_language == eLanguageTypeObjC || 2750 class_language == eLanguageTypeObjC_plus_plus) 2751 accessibility = eAccessNone; 2752 2753 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name)) 2754 { 2755 // Not all compilers will mark the vtable pointer 2756 // member as artificial (llvm-gcc). We can't have 2757 // the virtual members in our classes otherwise it 2758 // throws off all child offsets since we end up 2759 // having and extra pointer sized member in our 2760 // class layouts. 2761 is_artificial = true; 2762 } 2763 2764 // Handle static members 2765 if (is_external && member_byte_offset == UINT32_MAX) 2766 { 2767 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2768 2769 if (var_type) 2770 { 2771 if (accessibility == eAccessNone) 2772 accessibility = eAccessPublic; 2773 ClangASTContext::AddVariableToRecordType (class_clang_type, 2774 name, 2775 var_type->GetLayoutCompilerType (), 2776 accessibility); 2777 } 2778 break; 2779 } 2780 2781 if (is_artificial == false) 2782 { 2783 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2784 2785 clang::FieldDecl *field_decl = NULL; 2786 if (tag == DW_TAG_member) 2787 { 2788 if (member_type) 2789 { 2790 if (accessibility == eAccessNone) 2791 accessibility = default_accessibility; 2792 member_accessibilities.push_back(accessibility); 2793 2794 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2795 if (bit_size > 0) 2796 { 2797 2798 BitfieldInfo this_field_info; 2799 this_field_info.bit_offset = field_bit_offset; 2800 this_field_info.bit_size = bit_size; 2801 2802 ///////////////////////////////////////////////////////////// 2803 // How to locate a field given the DWARF debug information 2804 // 2805 // AT_byte_size indicates the size of the word in which the 2806 // bit offset must be interpreted. 2807 // 2808 // AT_data_member_location indicates the byte offset of the 2809 // word from the base address of the structure. 2810 // 2811 // AT_bit_offset indicates how many bits into the word 2812 // (according to the host endianness) the low-order bit of 2813 // the field starts. AT_bit_offset can be negative. 2814 // 2815 // AT_bit_size indicates the size of the field in bits. 2816 ///////////////////////////////////////////////////////////// 2817 2818 if (byte_size == 0) 2819 byte_size = member_type->GetByteSize(); 2820 2821 if (die.GetDWARF()->GetObjectFile()->GetByteOrder() == eByteOrderLittle) 2822 { 2823 this_field_info.bit_offset += byte_size * 8; 2824 this_field_info.bit_offset -= (bit_offset + bit_size); 2825 } 2826 else 2827 { 2828 this_field_info.bit_offset += bit_offset; 2829 } 2830 2831 // Update the field bit offset we will report for layout 2832 field_bit_offset = this_field_info.bit_offset; 2833 2834 // If the member to be emitted did not start on a character boundary and there is 2835 // empty space between the last field and this one, then we need to emit an 2836 // anonymous member filling up the space up to its start. There are three cases 2837 // here: 2838 // 2839 // 1 If the previous member ended on a character boundary, then we can emit an 2840 // anonymous member starting at the most recent character boundary. 2841 // 2842 // 2 If the previous member did not end on a character boundary and the distance 2843 // from the end of the previous member to the current member is less than a 2844 // word width, then we can emit an anonymous member starting right after the 2845 // previous member and right before this member. 2846 // 2847 // 3 If the previous member did not end on a character boundary and the distance 2848 // from the end of the previous member to the current member is greater than 2849 // or equal a word width, then we act as in Case 1. 2850 2851 const uint64_t character_width = 8; 2852 const uint64_t word_width = 32; 2853 2854 // Objective-C has invalid DW_AT_bit_offset values in older versions 2855 // of clang, so we have to be careful and only insert unnamed bitfields 2856 // if we have a new enough clang. 2857 bool detect_unnamed_bitfields = true; 2858 2859 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus) 2860 detect_unnamed_bitfields = die.GetCU()->Supports_unnamed_objc_bitfields (); 2861 2862 if (detect_unnamed_bitfields) 2863 { 2864 BitfieldInfo anon_field_info; 2865 2866 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned 2867 { 2868 uint64_t last_field_end = 0; 2869 2870 if (last_field_info.IsValid()) 2871 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2872 2873 if (this_field_info.bit_offset != last_field_end) 2874 { 2875 if (((last_field_end % character_width) == 0) || // case 1 2876 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3 2877 { 2878 anon_field_info.bit_size = this_field_info.bit_offset % character_width; 2879 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size; 2880 } 2881 else // case 2 2882 { 2883 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end; 2884 anon_field_info.bit_offset = last_field_end; 2885 } 2886 } 2887 } 2888 2889 if (anon_field_info.IsValid()) 2890 { 2891 clang::FieldDecl *unnamed_bitfield_decl = 2892 ClangASTContext::AddFieldToRecordType (class_clang_type, 2893 NULL, 2894 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width), 2895 accessibility, 2896 anon_field_info.bit_size); 2897 2898 layout_info.field_offsets.insert( 2899 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset)); 2900 } 2901 } 2902 last_field_info = this_field_info; 2903 } 2904 else 2905 { 2906 last_field_info.Clear(); 2907 } 2908 2909 CompilerType member_clang_type = member_type->GetLayoutCompilerType (); 2910 if (!member_clang_type.IsCompleteType()) 2911 member_clang_type.GetCompleteType(); 2912 2913 { 2914 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>). 2915 // If the current field is at the end of the structure, then there is definitely no room for extra 2916 // elements and we override the type to array[0]. 2917 2918 CompilerType member_array_element_type; 2919 uint64_t member_array_size; 2920 bool member_array_is_incomplete; 2921 2922 if (member_clang_type.IsArrayType(&member_array_element_type, 2923 &member_array_size, 2924 &member_array_is_incomplete) && 2925 !member_array_is_incomplete) 2926 { 2927 uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2928 2929 if (member_byte_offset >= parent_byte_size) 2930 { 2931 if (member_array_size != 1 && (member_array_size != 0 || member_byte_offset > parent_byte_size)) 2932 { 2933 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, 2934 die.GetID(), 2935 name, 2936 encoding_form.Reference(), 2937 parent_die.GetID()); 2938 } 2939 2940 member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false); 2941 } 2942 } 2943 } 2944 2945 if (ClangASTContext::IsCXXClassType(member_clang_type) && member_clang_type.GetCompleteType() == false) 2946 { 2947 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2948 module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nTry compiling the source file with -fno-limit-debug-info", 2949 parent_die.GetOffset(), 2950 parent_die.GetName(), 2951 die.GetOffset(), 2952 name); 2953 else 2954 module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s", 2955 parent_die.GetOffset(), 2956 parent_die.GetName(), 2957 die.GetOffset(), 2958 name, 2959 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 2960 // We have no choice other than to pretend that the member class 2961 // is complete. If we don't do this, clang will crash when trying 2962 // to layout the class. Since we provide layout assistance, all 2963 // ivars in this class and other classes will be fine, this is 2964 // the best we can do short of crashing. 2965 ClangASTContext::StartTagDeclarationDefinition(member_clang_type); 2966 ClangASTContext::CompleteTagDeclarationDefinition(member_clang_type); 2967 } 2968 2969 field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type, 2970 name, 2971 member_clang_type, 2972 accessibility, 2973 bit_size); 2974 2975 m_ast.SetMetadataAsUserID (field_decl, die.GetID()); 2976 2977 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset)); 2978 } 2979 else 2980 { 2981 if (name) 2982 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 2983 die.GetID(), 2984 name, 2985 encoding_form.Reference()); 2986 else 2987 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 2988 die.GetID(), 2989 encoding_form.Reference()); 2990 } 2991 } 2992 2993 if (prop_name != NULL && member_type) 2994 { 2995 clang::ObjCIvarDecl *ivar_decl = NULL; 2996 2997 if (field_decl) 2998 { 2999 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3000 assert (ivar_decl != NULL); 3001 } 3002 3003 ClangASTMetadata metadata; 3004 metadata.SetUserID (die.GetID()); 3005 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type, 3006 prop_name, 3007 member_type->GetLayoutCompilerType (), 3008 ivar_decl, 3009 prop_setter_name, 3010 prop_getter_name, 3011 prop_attributes, 3012 &metadata)); 3013 3014 if (ivar_decl) 3015 m_ast.SetMetadataAsUserID (ivar_decl, die.GetID()); 3016 } 3017 } 3018 } 3019 ++member_idx; 3020 } 3021 break; 3022 3023 case DW_TAG_subprogram: 3024 // Let the type parsing code handle this one for us. 3025 member_function_dies.Append (die); 3026 break; 3027 3028 case DW_TAG_inheritance: 3029 { 3030 is_a_class = true; 3031 if (default_accessibility == eAccessNone) 3032 default_accessibility = eAccessPrivate; 3033 // TODO: implement DW_TAG_inheritance type parsing 3034 DWARFAttributes attributes; 3035 const size_t num_attributes = die.GetAttributes (attributes); 3036 if (num_attributes > 0) 3037 { 3038 Declaration decl; 3039 DWARFExpression location(die.GetCU()); 3040 DWARFFormValue encoding_form; 3041 AccessType accessibility = default_accessibility; 3042 bool is_virtual = false; 3043 bool is_base_of_class = true; 3044 off_t member_byte_offset = 0; 3045 uint32_t i; 3046 for (i=0; i<num_attributes; ++i) 3047 { 3048 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3049 DWARFFormValue form_value; 3050 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3051 { 3052 switch (attr) 3053 { 3054 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3055 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3056 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3057 case DW_AT_type: encoding_form = form_value; break; 3058 case DW_AT_data_member_location: 3059 if (form_value.BlockData()) 3060 { 3061 Value initialValue(0); 3062 Value memberOffset(0); 3063 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 3064 uint32_t block_length = form_value.Unsigned(); 3065 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 3066 if (DWARFExpression::Evaluate (NULL, 3067 NULL, 3068 NULL, 3069 NULL, 3070 module_sp, 3071 debug_info_data, 3072 die.GetCU(), 3073 block_offset, 3074 block_length, 3075 eRegisterKindDWARF, 3076 &initialValue, 3077 memberOffset, 3078 NULL)) 3079 { 3080 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3081 } 3082 } 3083 else 3084 { 3085 // With DWARF 3 and later, if the value is an integer constant, 3086 // this form value is the offset in bytes from the beginning 3087 // of the containing entity. 3088 member_byte_offset = form_value.Unsigned(); 3089 } 3090 break; 3091 3092 case DW_AT_accessibility: 3093 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3094 break; 3095 3096 case DW_AT_virtuality: 3097 is_virtual = form_value.Boolean(); 3098 break; 3099 3100 case DW_AT_sibling: 3101 break; 3102 3103 default: 3104 break; 3105 } 3106 } 3107 } 3108 3109 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 3110 if (base_class_type == NULL) 3111 { 3112 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", 3113 die.GetOffset(), 3114 encoding_form.Reference(), 3115 parent_die.GetOffset()); 3116 break; 3117 } 3118 3119 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType (); 3120 assert (base_class_clang_type); 3121 if (class_language == eLanguageTypeObjC) 3122 { 3123 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3124 } 3125 else 3126 { 3127 base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(), 3128 accessibility, 3129 is_virtual, 3130 is_base_of_class)); 3131 3132 if (is_virtual) 3133 { 3134 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't 3135 // give us a constant offset, but gives us a DWARF expressions that requires an actual object 3136 // in memory. the DW_AT_data_member_location for a virtual base class looks like: 3137 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus ) 3138 // Given this, there is really no valid response we can give to clang for virtual base 3139 // class offsets, and this should eventually be removed from LayoutRecordType() in the external 3140 // AST source in clang. 3141 } 3142 else 3143 { 3144 layout_info.base_offsets.insert( 3145 std::make_pair(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 3146 clang::CharUnits::fromQuantity(member_byte_offset))); 3147 } 3148 } 3149 } 3150 } 3151 break; 3152 3153 default: 3154 break; 3155 } 3156 } 3157 3158 return true; 3159} 3160 3161 3162size_t 3163DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc, 3164 clang::DeclContext *containing_decl_ctx, 3165 const DWARFDIE &parent_die, 3166 bool skip_artificial, 3167 bool &is_static, 3168 bool &is_variadic, 3169 std::vector<CompilerType>& function_param_types, 3170 std::vector<clang::ParmVarDecl*>& function_param_decls, 3171 unsigned &type_quals) 3172{ 3173 if (!parent_die) 3174 return 0; 3175 3176 size_t arg_idx = 0; 3177 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3178 { 3179 const dw_tag_t tag = die.Tag(); 3180 switch (tag) 3181 { 3182 case DW_TAG_formal_parameter: 3183 { 3184 DWARFAttributes attributes; 3185 const size_t num_attributes = die.GetAttributes(attributes); 3186 if (num_attributes > 0) 3187 { 3188 const char *name = NULL; 3189 Declaration decl; 3190 DWARFFormValue param_type_die_form; 3191 bool is_artificial = false; 3192 // one of None, Auto, Register, Extern, Static, PrivateExtern 3193 3194 clang::StorageClass storage = clang::SC_None; 3195 uint32_t i; 3196 for (i=0; i<num_attributes; ++i) 3197 { 3198 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3199 DWARFFormValue form_value; 3200 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3201 { 3202 switch (attr) 3203 { 3204 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3205 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3206 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3207 case DW_AT_name: name = form_value.AsCString(); 3208 break; 3209 case DW_AT_type: param_type_die_form = form_value; break; 3210 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 3211 case DW_AT_location: 3212 // if (form_value.BlockData()) 3213 // { 3214 // const DWARFDataExtractor& debug_info_data = debug_info(); 3215 // uint32_t block_length = form_value.Unsigned(); 3216 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length); 3217 // } 3218 // else 3219 // { 3220 // } 3221 // break; 3222 case DW_AT_const_value: 3223 case DW_AT_default_value: 3224 case DW_AT_description: 3225 case DW_AT_endianity: 3226 case DW_AT_is_optional: 3227 case DW_AT_segment: 3228 case DW_AT_variable_parameter: 3229 default: 3230 case DW_AT_abstract_origin: 3231 case DW_AT_sibling: 3232 break; 3233 } 3234 } 3235 } 3236 3237 bool skip = false; 3238 if (skip_artificial) 3239 { 3240 if (is_artificial) 3241 { 3242 // In order to determine if a C++ member function is 3243 // "const" we have to look at the const-ness of "this"... 3244 // Ugly, but that 3245 if (arg_idx == 0) 3246 { 3247 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) 3248 { 3249 // Often times compilers omit the "this" name for the 3250 // specification DIEs, so we can't rely upon the name 3251 // being in the formal parameter DIE... 3252 if (name == NULL || ::strcmp(name, "this")==0) 3253 { 3254 Type *this_type = die.ResolveTypeUID (DIERef(param_type_die_form).GetUID()); 3255 if (this_type) 3256 { 3257 uint32_t encoding_mask = this_type->GetEncodingMask(); 3258 if (encoding_mask & Type::eEncodingIsPointerUID) 3259 { 3260 is_static = false; 3261 3262 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3263 type_quals |= clang::Qualifiers::Const; 3264 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3265 type_quals |= clang::Qualifiers::Volatile; 3266 } 3267 } 3268 } 3269 } 3270 } 3271 skip = true; 3272 } 3273 else 3274 { 3275 3276 // HACK: Objective C formal parameters "self" and "_cmd" 3277 // are not marked as artificial in the DWARF... 3278 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3279 if (comp_unit) 3280 { 3281 switch (comp_unit->GetLanguage()) 3282 { 3283 case eLanguageTypeObjC: 3284 case eLanguageTypeObjC_plus_plus: 3285 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0)) 3286 skip = true; 3287 break; 3288 default: 3289 break; 3290 } 3291 } 3292 } 3293 } 3294 3295 if (!skip) 3296 { 3297 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form).GetUID()); 3298 if (type) 3299 { 3300 function_param_types.push_back (type->GetForwardCompilerType ()); 3301 3302 clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name, 3303 type->GetForwardCompilerType (), 3304 storage); 3305 assert(param_var_decl); 3306 function_param_decls.push_back(param_var_decl); 3307 3308 m_ast.SetMetadataAsUserID (param_var_decl, die.GetID()); 3309 } 3310 } 3311 } 3312 arg_idx++; 3313 } 3314 break; 3315 3316 case DW_TAG_unspecified_parameters: 3317 is_variadic = true; 3318 break; 3319 3320 case DW_TAG_template_type_parameter: 3321 case DW_TAG_template_value_parameter: 3322 // The one caller of this was never using the template_param_infos, 3323 // and the local variable was taking up a large amount of stack space 3324 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3325 // the template params back, we can add them back. 3326 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3327 break; 3328 3329 default: 3330 break; 3331 } 3332 } 3333 return arg_idx; 3334} 3335 3336void 3337DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc, 3338 const DWARFDIE &parent_die, 3339 int64_t& first_index, 3340 std::vector<uint64_t>& element_orders, 3341 uint32_t& byte_stride, 3342 uint32_t& bit_stride) 3343{ 3344 if (!parent_die) 3345 return; 3346 3347 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3348 { 3349 const dw_tag_t tag = die.Tag(); 3350 switch (tag) 3351 { 3352 case DW_TAG_subrange_type: 3353 { 3354 DWARFAttributes attributes; 3355 const size_t num_child_attributes = die.GetAttributes(attributes); 3356 if (num_child_attributes > 0) 3357 { 3358 uint64_t num_elements = 0; 3359 uint64_t lower_bound = 0; 3360 uint64_t upper_bound = 0; 3361 bool upper_bound_valid = false; 3362 uint32_t i; 3363 for (i=0; i<num_child_attributes; ++i) 3364 { 3365 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3366 DWARFFormValue form_value; 3367 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3368 { 3369 switch (attr) 3370 { 3371 case DW_AT_name: 3372 break; 3373 3374 case DW_AT_count: 3375 num_elements = form_value.Unsigned(); 3376 break; 3377 3378 case DW_AT_bit_stride: 3379 bit_stride = form_value.Unsigned(); 3380 break; 3381 3382 case DW_AT_byte_stride: 3383 byte_stride = form_value.Unsigned(); 3384 break; 3385 3386 case DW_AT_lower_bound: 3387 lower_bound = form_value.Unsigned(); 3388 break; 3389 3390 case DW_AT_upper_bound: 3391 upper_bound_valid = true; 3392 upper_bound = form_value.Unsigned(); 3393 break; 3394 3395 default: 3396 case DW_AT_abstract_origin: 3397 case DW_AT_accessibility: 3398 case DW_AT_allocated: 3399 case DW_AT_associated: 3400 case DW_AT_data_location: 3401 case DW_AT_declaration: 3402 case DW_AT_description: 3403 case DW_AT_sibling: 3404 case DW_AT_threads_scaled: 3405 case DW_AT_type: 3406 case DW_AT_visibility: 3407 break; 3408 } 3409 } 3410 } 3411 3412 if (num_elements == 0) 3413 { 3414 if (upper_bound_valid && upper_bound >= lower_bound) 3415 num_elements = upper_bound - lower_bound + 1; 3416 } 3417 3418 element_orders.push_back (num_elements); 3419 } 3420 } 3421 break; 3422 } 3423 } 3424} 3425 3426Type * 3427DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die) 3428{ 3429 if (die) 3430 { 3431 SymbolFileDWARF *dwarf = die.GetDWARF(); 3432 DWARFAttributes attributes; 3433 const size_t num_attributes = die.GetAttributes(attributes); 3434 if (num_attributes > 0) 3435 { 3436 DWARFFormValue type_die_form; 3437 for (size_t i = 0; i < num_attributes; ++i) 3438 { 3439 dw_attr_t attr = attributes.AttributeAtIndex(i); 3440 DWARFFormValue form_value; 3441 3442 if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value)) 3443 return dwarf->ResolveTypeUID(DIERef(form_value).GetUID()); 3444 } 3445 } 3446 } 3447 3448 return nullptr; 3449} 3450 3451clang::Decl * 3452DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die) 3453{ 3454 if (!die) 3455 return nullptr; 3456 3457 switch (die.Tag()) 3458 { 3459 case DW_TAG_variable: 3460 case DW_TAG_constant: 3461 case DW_TAG_formal_parameter: 3462 case DW_TAG_imported_declaration: 3463 case DW_TAG_imported_module: 3464 break; 3465 default: 3466 return nullptr; 3467 } 3468 3469 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3470 if (cache_pos != m_die_to_decl.end()) 3471 return cache_pos->second; 3472 3473 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) 3474 { 3475 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3476 m_die_to_decl[die.GetDIE()] = decl; 3477 m_decl_to_die[decl].insert(die.GetDIE()); 3478 return decl; 3479 } 3480 3481 clang::Decl *decl = nullptr; 3482 switch (die.Tag()) 3483 { 3484 case DW_TAG_variable: 3485 case DW_TAG_constant: 3486 case DW_TAG_formal_parameter: 3487 { 3488 SymbolFileDWARF *dwarf = die.GetDWARF(); 3489 Type *type = GetTypeForDIE(die); 3490 const char *name = die.GetName(); 3491 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3492 decl = m_ast.CreateVariableDeclaration( 3493 decl_context, 3494 name, 3495 ClangASTContext::GetQualType(type->GetForwardCompilerType())); 3496 break; 3497 } 3498 case DW_TAG_imported_declaration: 3499 { 3500 SymbolFileDWARF *dwarf = die.GetDWARF(); 3501 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3502 3503 if (dwarf->UserIDMatches(imported_uid)) 3504 { 3505 CompilerDecl imported_decl = dwarf->GetDeclForUID(imported_uid); 3506 if (imported_decl) 3507 { 3508 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3509 if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl())) 3510 decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3511 } 3512 } 3513 break; 3514 } 3515 case DW_TAG_imported_module: 3516 { 3517 SymbolFileDWARF *dwarf = die.GetDWARF(); 3518 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3519 3520 if (dwarf->UserIDMatches(imported_uid)) 3521 { 3522 CompilerDeclContext imported_decl = dwarf->GetDeclContextForUID(imported_uid); 3523 if (imported_decl) 3524 { 3525 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3526 if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl)) 3527 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3528 } 3529 } 3530 break; 3531 } 3532 default: 3533 break; 3534 } 3535 3536 m_die_to_decl[die.GetDIE()] = decl; 3537 m_decl_to_die[decl].insert(die.GetDIE()); 3538 3539 return decl; 3540} 3541 3542clang::DeclContext * 3543DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die) 3544{ 3545 if (die) 3546 { 3547 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die); 3548 if (decl_ctx) 3549 return decl_ctx; 3550 3551 bool try_parsing_type = true; 3552 switch (die.Tag()) 3553 { 3554 case DW_TAG_compile_unit: 3555 decl_ctx = m_ast.GetTranslationUnitDecl(); 3556 try_parsing_type = false; 3557 break; 3558 3559 case DW_TAG_namespace: 3560 decl_ctx = ResolveNamespaceDIE (die); 3561 try_parsing_type = false; 3562 break; 3563 3564 case DW_TAG_lexical_block: 3565 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3566 try_parsing_type = false; 3567 break; 3568 3569 default: 3570 break; 3571 } 3572 3573 if (decl_ctx == nullptr && try_parsing_type) 3574 { 3575 Type* type = die.GetDWARF()->ResolveType (die); 3576 if (type) 3577 decl_ctx = GetCachedClangDeclContextForDIE (die); 3578 } 3579 3580 if (decl_ctx) 3581 { 3582 LinkDeclContextToDIE (decl_ctx, die); 3583 return decl_ctx; 3584 } 3585 } 3586 return nullptr; 3587} 3588 3589clang::BlockDecl * 3590DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die) 3591{ 3592 if (die && die.Tag() == DW_TAG_lexical_block) 3593 { 3594 clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3595 3596 if (!decl) 3597 { 3598 DWARFDIE decl_context_die; 3599 clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die); 3600 decl = m_ast.CreateBlockDeclaration(decl_context); 3601 3602 if (decl) 3603 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3604 } 3605 3606 return decl; 3607 } 3608 return nullptr; 3609} 3610 3611clang::NamespaceDecl * 3612DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &die) 3613{ 3614 if (die && die.Tag() == DW_TAG_namespace) 3615 { 3616 // See if we already parsed this namespace DIE and associated it with a 3617 // uniqued namespace declaration 3618 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3619 if (namespace_decl) 3620 return namespace_decl; 3621 else 3622 { 3623 const char *namespace_name = die.GetName(); 3624 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 3625 namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx); 3626 Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3627 if (log) 3628 { 3629 SymbolFileDWARF *dwarf = die.GetDWARF(); 3630 if (namespace_name) 3631 { 3632 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3633 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)", 3634 static_cast<void*>(m_ast.getASTContext()), 3635 die.GetID(), 3636 namespace_name, 3637 static_cast<void*>(namespace_decl), 3638 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3639 } 3640 else 3641 { 3642 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3643 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)", 3644 static_cast<void*>(m_ast.getASTContext()), 3645 die.GetID(), 3646 static_cast<void*>(namespace_decl), 3647 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3648 } 3649 } 3650 3651 if (namespace_decl) 3652 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die); 3653 return namespace_decl; 3654 } 3655 } 3656 return nullptr; 3657} 3658 3659clang::DeclContext * 3660DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die, 3661 DWARFDIE *decl_ctx_die_copy) 3662{ 3663 SymbolFileDWARF *dwarf = die.GetDWARF(); 3664 3665 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die); 3666 3667 if (decl_ctx_die_copy) 3668 *decl_ctx_die_copy = decl_ctx_die; 3669 3670 if (decl_ctx_die) 3671 { 3672 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die); 3673 if (clang_decl_ctx) 3674 return clang_decl_ctx; 3675 } 3676 return m_ast.GetTranslationUnitDecl(); 3677} 3678 3679clang::DeclContext * 3680DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die) 3681{ 3682 if (die) 3683 { 3684 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3685 if (pos != m_die_to_decl_ctx.end()) 3686 return pos->second; 3687 } 3688 return nullptr; 3689} 3690 3691void 3692DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die) 3693{ 3694 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3695 // There can be many DIEs for a single decl context 3696 //m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3697 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3698} 3699 3700bool 3701DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die, 3702 const DWARFDIE &dst_class_die, 3703 lldb_private::Type *class_type, 3704 DWARFDIECollection &failures) 3705{ 3706 if (!class_type || !src_class_die || !dst_class_die) 3707 return false; 3708 if (src_class_die.Tag() != dst_class_die.Tag()) 3709 return false; 3710 3711 // We need to complete the class type so we can get all of the method types 3712 // parsed so we can then unique those types to their equivalent counterparts 3713 // in "dst_cu" and "dst_class_die" 3714 class_type->GetFullCompilerType (); 3715 3716 DWARFDIE src_die; 3717 DWARFDIE dst_die; 3718 UniqueCStringMap<DWARFDIE> src_name_to_die; 3719 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3720 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3721 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3722 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); src_die = src_die.GetSibling()) 3723 { 3724 if (src_die.Tag() == DW_TAG_subprogram) 3725 { 3726 // Make sure this is a declaration and not a concrete instance by looking 3727 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3728 // are placed inside the class definitions and shouldn't be included in 3729 // the list of things are are tracking here. 3730 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3731 { 3732 const char *src_name = src_die.GetMangledName (); 3733 if (src_name) 3734 { 3735 ConstString src_const_name(src_name); 3736 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3737 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die); 3738 else 3739 src_name_to_die.Append(src_const_name.GetCString(), src_die); 3740 } 3741 } 3742 } 3743 } 3744 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); dst_die = dst_die.GetSibling()) 3745 { 3746 if (dst_die.Tag() == DW_TAG_subprogram) 3747 { 3748 // Make sure this is a declaration and not a concrete instance by looking 3749 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3750 // are placed inside the class definitions and shouldn't be included in 3751 // the list of things are are tracking here. 3752 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3753 { 3754 const char *dst_name = dst_die.GetMangledName (); 3755 if (dst_name) 3756 { 3757 ConstString dst_const_name(dst_name); 3758 if ( dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3759 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die); 3760 else 3761 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die); 3762 } 3763 } 3764 } 3765 } 3766 const uint32_t src_size = src_name_to_die.GetSize (); 3767 const uint32_t dst_size = dst_name_to_die.GetSize (); 3768 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION)); 3769 3770 // Is everything kosher so we can go through the members at top speed? 3771 bool fast_path = true; 3772 3773 if (src_size != dst_size) 3774 { 3775 if (src_size != 0 && dst_size != 0) 3776 { 3777 if (log) 3778 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)", 3779 src_class_die.GetOffset(), 3780 dst_class_die.GetOffset(), 3781 src_size, 3782 dst_size); 3783 } 3784 3785 fast_path = false; 3786 } 3787 3788 uint32_t idx; 3789 3790 if (fast_path) 3791 { 3792 for (idx = 0; idx < src_size; ++idx) 3793 { 3794 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3795 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3796 3797 if (src_die.Tag() != dst_die.Tag()) 3798 { 3799 if (log) 3800 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)", 3801 src_class_die.GetOffset(), 3802 dst_class_die.GetOffset(), 3803 src_die.GetOffset(), 3804 src_die.GetTagAsCString(), 3805 dst_die.GetOffset(), 3806 dst_die.GetTagAsCString()); 3807 fast_path = false; 3808 } 3809 3810 const char *src_name = src_die.GetMangledName (); 3811 const char *dst_name = dst_die.GetMangledName (); 3812 3813 // Make sure the names match 3814 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0)) 3815 continue; 3816 3817 if (log) 3818 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)", 3819 src_class_die.GetOffset(), 3820 dst_class_die.GetOffset(), 3821 src_die.GetOffset(), 3822 src_name, 3823 dst_die.GetOffset(), 3824 dst_name); 3825 3826 fast_path = false; 3827 } 3828 } 3829 3830 DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser(); 3831 DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3832 3833 // Now do the work of linking the DeclContexts and Types. 3834 if (fast_path) 3835 { 3836 // We can do this quickly. Just run across the tables index-for-index since 3837 // we know each node has matching names and tags. 3838 for (idx = 0; idx < src_size; ++idx) 3839 { 3840 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3841 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3842 3843 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3844 if (src_decl_ctx) 3845 { 3846 if (log) 3847 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3848 static_cast<void*>(src_decl_ctx), 3849 src_die.GetOffset(), dst_die.GetOffset()); 3850 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3851 } 3852 else 3853 { 3854 if (log) 3855 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", 3856 src_die.GetOffset(), dst_die.GetOffset()); 3857 } 3858 3859 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3860 if (src_child_type) 3861 { 3862 if (log) 3863 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3864 static_cast<void*>(src_child_type), 3865 src_child_type->GetID(), 3866 src_die.GetOffset(), dst_die.GetOffset()); 3867 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3868 } 3869 else 3870 { 3871 if (log) 3872 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()); 3873 } 3874 } 3875 } 3876 else 3877 { 3878 // We must do this slowly. For each member of the destination, look 3879 // up a member in the source with the same name, check its tag, and 3880 // unique them if everything matches up. Report failures. 3881 3882 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) 3883 { 3884 src_name_to_die.Sort(); 3885 3886 for (idx = 0; idx < dst_size; ++idx) 3887 { 3888 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3889 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3890 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3891 3892 if (src_die && (src_die.Tag() == dst_die.Tag())) 3893 { 3894 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3895 if (src_decl_ctx) 3896 { 3897 if (log) 3898 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3899 static_cast<void*>(src_decl_ctx), 3900 src_die.GetOffset(), 3901 dst_die.GetOffset()); 3902 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3903 } 3904 else 3905 { 3906 if (log) 3907 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()); 3908 } 3909 3910 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3911 if (src_child_type) 3912 { 3913 if (log) 3914 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3915 static_cast<void*>(src_child_type), 3916 src_child_type->GetID(), 3917 src_die.GetOffset(), 3918 dst_die.GetOffset()); 3919 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3920 } 3921 else 3922 { 3923 if (log) 3924 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()); 3925 } 3926 } 3927 else 3928 { 3929 if (log) 3930 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die.GetOffset()); 3931 3932 failures.Append(dst_die); 3933 } 3934 } 3935 } 3936 } 3937 3938 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize (); 3939 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize (); 3940 3941 if (src_size_artificial && dst_size_artificial) 3942 { 3943 dst_name_to_die_artificial.Sort(); 3944 3945 for (idx = 0; idx < src_size_artificial; ++idx) 3946 { 3947 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx); 3948 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 3949 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3950 3951 if (dst_die) 3952 { 3953 // Both classes have the artificial types, link them 3954 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3955 if (src_decl_ctx) 3956 { 3957 if (log) 3958 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3959 static_cast<void*>(src_decl_ctx), 3960 src_die.GetOffset(), dst_die.GetOffset()); 3961 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3962 } 3963 else 3964 { 3965 if (log) 3966 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()); 3967 } 3968 3969 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3970 if (src_child_type) 3971 { 3972 if (log) 3973 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3974 static_cast<void*>(src_child_type), 3975 src_child_type->GetID(), 3976 src_die.GetOffset(), dst_die.GetOffset()); 3977 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3978 } 3979 else 3980 { 3981 if (log) 3982 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()); 3983 } 3984 } 3985 } 3986 } 3987 3988 if (dst_size_artificial) 3989 { 3990 for (idx = 0; idx < dst_size_artificial; ++idx) 3991 { 3992 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx); 3993 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 3994 if (log) 3995 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die.GetOffset(), dst_name_artificial); 3996 3997 failures.Append(dst_die); 3998 } 3999 } 4000 4001 return (failures.Size() != 0); 4002} 4003 4004 4005bool 4006DWARFASTParserClang::LayoutRecordType(const clang::RecordDecl *record_decl, 4007 uint64_t &bit_size, 4008 uint64_t &alignment, 4009 llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets, 4010 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets, 4011 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets) 4012{ 4013 RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl); 4014 bool success = false; 4015 base_offsets.clear(); 4016 vbase_offsets.clear(); 4017 if (pos != m_record_decl_to_layout_map.end()) 4018 { 4019 bit_size = pos->second.bit_size; 4020 alignment = pos->second.alignment; 4021 field_offsets.swap(pos->second.field_offsets); 4022 base_offsets.swap (pos->second.base_offsets); 4023 vbase_offsets.swap (pos->second.vbase_offsets); 4024 m_record_decl_to_layout_map.erase(pos); 4025 success = true; 4026 } 4027 else 4028 { 4029 bit_size = 0; 4030 alignment = 0; 4031 field_offsets.clear(); 4032 } 4033 return success; 4034} 4035