ASTReader.cpp revision 1a995ddaa53a20dcd063ea47eb1f533ecb0d243a
1//===--- ASTReader.cpp - AST File Reader ------------------------*- 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// This file defines the ASTReader class, which reads AST files. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Serialization/ASTReader.h" 15#include "clang/Serialization/ASTDeserializationListener.h" 16#include "clang/Serialization/ModuleManager.h" 17#include "ASTCommon.h" 18#include "ASTReaderInternals.h" 19#include "clang/Frontend/FrontendDiagnostic.h" 20#include "clang/Frontend/Utils.h" 21#include "clang/Sema/Sema.h" 22#include "clang/Sema/Scope.h" 23#include "clang/AST/ASTConsumer.h" 24#include "clang/AST/ASTContext.h" 25#include "clang/AST/DeclTemplate.h" 26#include "clang/AST/Expr.h" 27#include "clang/AST/ExprCXX.h" 28#include "clang/AST/NestedNameSpecifier.h" 29#include "clang/AST/Type.h" 30#include "clang/AST/TypeLocVisitor.h" 31#include "clang/Lex/MacroInfo.h" 32#include "clang/Lex/PreprocessingRecord.h" 33#include "clang/Lex/Preprocessor.h" 34#include "clang/Lex/HeaderSearch.h" 35#include "clang/Basic/OnDiskHashTable.h" 36#include "clang/Basic/SourceManager.h" 37#include "clang/Basic/SourceManagerInternals.h" 38#include "clang/Basic/FileManager.h" 39#include "clang/Basic/FileSystemStatCache.h" 40#include "clang/Basic/TargetInfo.h" 41#include "clang/Basic/Version.h" 42#include "clang/Basic/VersionTuple.h" 43#include "llvm/ADT/StringExtras.h" 44#include "llvm/Bitcode/BitstreamReader.h" 45#include "llvm/Support/MemoryBuffer.h" 46#include "llvm/Support/ErrorHandling.h" 47#include "llvm/Support/FileSystem.h" 48#include "llvm/Support/Path.h" 49#include "llvm/Support/system_error.h" 50#include <algorithm> 51#include <iterator> 52#include <cstdio> 53#include <sys/stat.h> 54 55using namespace clang; 56using namespace clang::serialization; 57using namespace clang::serialization::reader; 58 59//===----------------------------------------------------------------------===// 60// PCH validator implementation 61//===----------------------------------------------------------------------===// 62 63ASTReaderListener::~ASTReaderListener() {} 64 65bool 66PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) { 67 const LangOptions &PPLangOpts = PP.getLangOptions(); 68 69#define LANGOPT(Name, Bits, Default, Description) \ 70 if (PPLangOpts.Name != LangOpts.Name) { \ 71 Reader.Diag(diag::err_pch_langopt_mismatch) \ 72 << Description << LangOpts.Name << PPLangOpts.Name; \ 73 return true; \ 74 } 75 76#define VALUE_LANGOPT(Name, Bits, Default, Description) \ 77 if (PPLangOpts.Name != LangOpts.Name) { \ 78 Reader.Diag(diag::err_pch_langopt_value_mismatch) \ 79 << Description; \ 80 return true; \ 81} 82 83#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ 84 if (PPLangOpts.get##Name() != LangOpts.get##Name()) { \ 85 Reader.Diag(diag::err_pch_langopt_value_mismatch) \ 86 << Description; \ 87 return true; \ 88 } 89 90#define BENIGN_LANGOPT(Name, Bits, Default, Description) 91#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) 92#include "clang/Basic/LangOptions.def" 93 94 return false; 95} 96 97bool PCHValidator::ReadTargetTriple(StringRef Triple) { 98 if (Triple == PP.getTargetInfo().getTriple().str()) 99 return false; 100 101 Reader.Diag(diag::warn_pch_target_triple) 102 << Triple << PP.getTargetInfo().getTriple().str(); 103 return true; 104} 105 106namespace { 107 struct EmptyStringRef { 108 bool operator ()(StringRef r) const { return r.empty(); } 109 }; 110 struct EmptyBlock { 111 bool operator ()(const PCHPredefinesBlock &r) const {return r.Data.empty();} 112 }; 113} 114 115static bool EqualConcatenations(SmallVector<StringRef, 2> L, 116 PCHPredefinesBlocks R) { 117 // First, sum up the lengths. 118 unsigned LL = 0, RL = 0; 119 for (unsigned I = 0, N = L.size(); I != N; ++I) { 120 LL += L[I].size(); 121 } 122 for (unsigned I = 0, N = R.size(); I != N; ++I) { 123 RL += R[I].Data.size(); 124 } 125 if (LL != RL) 126 return false; 127 if (LL == 0 && RL == 0) 128 return true; 129 130 // Kick out empty parts, they confuse the algorithm below. 131 L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end()); 132 R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end()); 133 134 // Do it the hard way. At this point, both vectors must be non-empty. 135 StringRef LR = L[0], RR = R[0].Data; 136 unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size(); 137 (void) RN; 138 for (;;) { 139 // Compare the current pieces. 140 if (LR.size() == RR.size()) { 141 // If they're the same length, it's pretty easy. 142 if (LR != RR) 143 return false; 144 // Both pieces are done, advance. 145 ++LI; 146 ++RI; 147 // If either string is done, they're both done, since they're the same 148 // length. 149 if (LI == LN) { 150 assert(RI == RN && "Strings not the same length after all?"); 151 return true; 152 } 153 LR = L[LI]; 154 RR = R[RI].Data; 155 } else if (LR.size() < RR.size()) { 156 // Right piece is longer. 157 if (!RR.startswith(LR)) 158 return false; 159 ++LI; 160 assert(LI != LN && "Strings not the same length after all?"); 161 RR = RR.substr(LR.size()); 162 LR = L[LI]; 163 } else { 164 // Left piece is longer. 165 if (!LR.startswith(RR)) 166 return false; 167 ++RI; 168 assert(RI != RN && "Strings not the same length after all?"); 169 LR = LR.substr(RR.size()); 170 RR = R[RI].Data; 171 } 172 } 173} 174 175static std::pair<FileID, StringRef::size_type> 176FindMacro(const PCHPredefinesBlocks &Buffers, StringRef MacroDef) { 177 std::pair<FileID, StringRef::size_type> Res; 178 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) { 179 Res.second = Buffers[I].Data.find(MacroDef); 180 if (Res.second != StringRef::npos) { 181 Res.first = Buffers[I].BufferID; 182 break; 183 } 184 } 185 return Res; 186} 187 188bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, 189 StringRef OriginalFileName, 190 std::string &SuggestedPredefines, 191 FileManager &FileMgr) { 192 // We are in the context of an implicit include, so the predefines buffer will 193 // have a #include entry for the PCH file itself (as normalized by the 194 // preprocessor initialization). Find it and skip over it in the checking 195 // below. 196 llvm::SmallString<256> PCHInclude; 197 PCHInclude += "#include \""; 198 PCHInclude += NormalizeDashIncludePath(OriginalFileName, FileMgr); 199 PCHInclude += "\"\n"; 200 std::pair<StringRef,StringRef> Split = 201 StringRef(PP.getPredefines()).split(PCHInclude.str()); 202 StringRef Left = Split.first, Right = Split.second; 203 if (Left == PP.getPredefines()) { 204 Error("Missing PCH include entry!"); 205 return true; 206 } 207 208 // If the concatenation of all the PCH buffers is equal to the adjusted 209 // command line, we're done. 210 SmallVector<StringRef, 2> CommandLine; 211 CommandLine.push_back(Left); 212 CommandLine.push_back(Right); 213 if (EqualConcatenations(CommandLine, Buffers)) 214 return false; 215 216 SourceManager &SourceMgr = PP.getSourceManager(); 217 218 // The predefines buffers are different. Determine what the differences are, 219 // and whether they require us to reject the PCH file. 220 SmallVector<StringRef, 8> PCHLines; 221 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) 222 Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 223 224 SmallVector<StringRef, 8> CmdLineLines; 225 Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 226 227 // Pick out implicit #includes after the PCH and don't consider them for 228 // validation; we will insert them into SuggestedPredefines so that the 229 // preprocessor includes them. 230 std::string IncludesAfterPCH; 231 SmallVector<StringRef, 8> AfterPCHLines; 232 Right.split(AfterPCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 233 for (unsigned i = 0, e = AfterPCHLines.size(); i != e; ++i) { 234 if (AfterPCHLines[i].startswith("#include ")) { 235 IncludesAfterPCH += AfterPCHLines[i]; 236 IncludesAfterPCH += '\n'; 237 } else { 238 CmdLineLines.push_back(AfterPCHLines[i]); 239 } 240 } 241 242 // Make sure we add the includes last into SuggestedPredefines before we 243 // exit this function. 244 struct AddIncludesRAII { 245 std::string &SuggestedPredefines; 246 std::string &IncludesAfterPCH; 247 248 AddIncludesRAII(std::string &SuggestedPredefines, 249 std::string &IncludesAfterPCH) 250 : SuggestedPredefines(SuggestedPredefines), 251 IncludesAfterPCH(IncludesAfterPCH) { } 252 ~AddIncludesRAII() { 253 SuggestedPredefines += IncludesAfterPCH; 254 } 255 } AddIncludes(SuggestedPredefines, IncludesAfterPCH); 256 257 // Sort both sets of predefined buffer lines, since we allow some extra 258 // definitions and they may appear at any point in the output. 259 std::sort(CmdLineLines.begin(), CmdLineLines.end()); 260 std::sort(PCHLines.begin(), PCHLines.end()); 261 262 // Determine which predefines that were used to build the PCH file are missing 263 // from the command line. 264 std::vector<StringRef> MissingPredefines; 265 std::set_difference(PCHLines.begin(), PCHLines.end(), 266 CmdLineLines.begin(), CmdLineLines.end(), 267 std::back_inserter(MissingPredefines)); 268 269 bool MissingDefines = false; 270 bool ConflictingDefines = false; 271 for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) { 272 StringRef Missing = MissingPredefines[I]; 273 if (Missing.startswith("#include ")) { 274 // An -include was specified when generating the PCH; it is included in 275 // the PCH, just ignore it. 276 continue; 277 } 278 if (!Missing.startswith("#define ")) { 279 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 280 return true; 281 } 282 283 // This is a macro definition. Determine the name of the macro we're 284 // defining. 285 std::string::size_type StartOfMacroName = strlen("#define "); 286 std::string::size_type EndOfMacroName 287 = Missing.find_first_of("( \n\r", StartOfMacroName); 288 assert(EndOfMacroName != std::string::npos && 289 "Couldn't find the end of the macro name"); 290 StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName); 291 292 // Determine whether this macro was given a different definition on the 293 // command line. 294 std::string MacroDefStart = "#define " + MacroName.str(); 295 std::string::size_type MacroDefLen = MacroDefStart.size(); 296 SmallVector<StringRef, 8>::iterator ConflictPos 297 = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(), 298 MacroDefStart); 299 for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) { 300 if (!ConflictPos->startswith(MacroDefStart)) { 301 // Different macro; we're done. 302 ConflictPos = CmdLineLines.end(); 303 break; 304 } 305 306 assert(ConflictPos->size() > MacroDefLen && 307 "Invalid #define in predefines buffer?"); 308 if ((*ConflictPos)[MacroDefLen] != ' ' && 309 (*ConflictPos)[MacroDefLen] != '(') 310 continue; // Longer macro name; keep trying. 311 312 // We found a conflicting macro definition. 313 break; 314 } 315 316 if (ConflictPos != CmdLineLines.end()) { 317 Reader.Diag(diag::warn_cmdline_conflicting_macro_def) 318 << MacroName; 319 320 // Show the definition of this macro within the PCH file. 321 std::pair<FileID, StringRef::size_type> MacroLoc = 322 FindMacro(Buffers, Missing); 323 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 324 SourceLocation PCHMissingLoc = 325 SourceMgr.getLocForStartOfFile(MacroLoc.first) 326 .getFileLocWithOffset(MacroLoc.second); 327 Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName; 328 329 ConflictingDefines = true; 330 continue; 331 } 332 333 // If the macro doesn't conflict, then we'll just pick up the macro 334 // definition from the PCH file. Warn the user that they made a mistake. 335 if (ConflictingDefines) 336 continue; // Don't complain if there are already conflicting defs 337 338 if (!MissingDefines) { 339 Reader.Diag(diag::warn_cmdline_missing_macro_defs); 340 MissingDefines = true; 341 } 342 343 // Show the definition of this macro within the PCH file. 344 std::pair<FileID, StringRef::size_type> MacroLoc = 345 FindMacro(Buffers, Missing); 346 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 347 SourceLocation PCHMissingLoc = 348 SourceMgr.getLocForStartOfFile(MacroLoc.first) 349 .getFileLocWithOffset(MacroLoc.second); 350 Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch); 351 } 352 353 if (ConflictingDefines) 354 return true; 355 356 // Determine what predefines were introduced based on command-line 357 // parameters that were not present when building the PCH 358 // file. Extra #defines are okay, so long as the identifiers being 359 // defined were not used within the precompiled header. 360 std::vector<StringRef> ExtraPredefines; 361 std::set_difference(CmdLineLines.begin(), CmdLineLines.end(), 362 PCHLines.begin(), PCHLines.end(), 363 std::back_inserter(ExtraPredefines)); 364 for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) { 365 StringRef &Extra = ExtraPredefines[I]; 366 if (!Extra.startswith("#define ")) { 367 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 368 return true; 369 } 370 371 // This is an extra macro definition. Determine the name of the 372 // macro we're defining. 373 std::string::size_type StartOfMacroName = strlen("#define "); 374 std::string::size_type EndOfMacroName 375 = Extra.find_first_of("( \n\r", StartOfMacroName); 376 assert(EndOfMacroName != std::string::npos && 377 "Couldn't find the end of the macro name"); 378 StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName); 379 380 // Check whether this name was used somewhere in the PCH file. If 381 // so, defining it as a macro could change behavior, so we reject 382 // the PCH file. 383 if (IdentifierInfo *II = Reader.get(MacroName)) { 384 Reader.Diag(diag::warn_macro_name_used_in_pch) << II; 385 return true; 386 } 387 388 // Add this definition to the suggested predefines buffer. 389 SuggestedPredefines += Extra; 390 SuggestedPredefines += '\n'; 391 } 392 393 // If we get here, it's because the predefines buffer had compatible 394 // contents. Accept the PCH file. 395 return false; 396} 397 398void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI, 399 unsigned ID) { 400 PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID); 401 ++NumHeaderInfos; 402} 403 404void PCHValidator::ReadCounter(unsigned Value) { 405 PP.setCounterValue(Value); 406} 407 408//===----------------------------------------------------------------------===// 409// AST reader implementation 410//===----------------------------------------------------------------------===// 411 412void 413ASTReader::setDeserializationListener(ASTDeserializationListener *Listener) { 414 DeserializationListener = Listener; 415} 416 417 418 419unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) { 420 return serialization::ComputeHash(Sel); 421} 422 423 424std::pair<unsigned, unsigned> 425ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) { 426 using namespace clang::io; 427 unsigned KeyLen = ReadUnalignedLE16(d); 428 unsigned DataLen = ReadUnalignedLE16(d); 429 return std::make_pair(KeyLen, DataLen); 430} 431 432ASTSelectorLookupTrait::internal_key_type 433ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) { 434 using namespace clang::io; 435 SelectorTable &SelTable = Reader.getContext().Selectors; 436 unsigned N = ReadUnalignedLE16(d); 437 IdentifierInfo *FirstII 438 = Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 439 if (N == 0) 440 return SelTable.getNullarySelector(FirstII); 441 else if (N == 1) 442 return SelTable.getUnarySelector(FirstII); 443 444 SmallVector<IdentifierInfo *, 16> Args; 445 Args.push_back(FirstII); 446 for (unsigned I = 1; I != N; ++I) 447 Args.push_back(Reader.getLocalIdentifier(F, ReadUnalignedLE32(d))); 448 449 return SelTable.getSelector(N, Args.data()); 450} 451 452ASTSelectorLookupTrait::data_type 453ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d, 454 unsigned DataLen) { 455 using namespace clang::io; 456 457 data_type Result; 458 459 Result.ID = Reader.getGlobalSelectorID(F, ReadUnalignedLE32(d)); 460 unsigned NumInstanceMethods = ReadUnalignedLE16(d); 461 unsigned NumFactoryMethods = ReadUnalignedLE16(d); 462 463 // Load instance methods 464 for (unsigned I = 0; I != NumInstanceMethods; ++I) { 465 if (ObjCMethodDecl *Method 466 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d))) 467 Result.Instance.push_back(Method); 468 } 469 470 // Load factory methods 471 for (unsigned I = 0; I != NumFactoryMethods; ++I) { 472 if (ObjCMethodDecl *Method 473 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d))) 474 Result.Factory.push_back(Method); 475 } 476 477 return Result; 478} 479 480unsigned ASTIdentifierLookupTrait::ComputeHash(const internal_key_type& a) { 481 return llvm::HashString(StringRef(a.first, a.second)); 482} 483 484std::pair<unsigned, unsigned> 485ASTIdentifierLookupTrait::ReadKeyDataLength(const unsigned char*& d) { 486 using namespace clang::io; 487 unsigned DataLen = ReadUnalignedLE16(d); 488 unsigned KeyLen = ReadUnalignedLE16(d); 489 return std::make_pair(KeyLen, DataLen); 490} 491 492std::pair<const char*, unsigned> 493ASTIdentifierLookupTrait::ReadKey(const unsigned char* d, unsigned n) { 494 assert(n >= 2 && d[n-1] == '\0'); 495 return std::make_pair((const char*) d, n-1); 496} 497 498IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k, 499 const unsigned char* d, 500 unsigned DataLen) { 501 using namespace clang::io; 502 unsigned RawID = ReadUnalignedLE32(d); 503 bool IsInteresting = RawID & 0x01; 504 505 // Wipe out the "is interesting" bit. 506 RawID = RawID >> 1; 507 508 IdentID ID = Reader.getGlobalIdentifierID(F, RawID); 509 if (!IsInteresting) { 510 // For uninteresting identifiers, just build the IdentifierInfo 511 // and associate it with the persistent ID. 512 IdentifierInfo *II = KnownII; 513 if (!II) 514 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 515 Reader.SetIdentifierInfo(ID, II); 516 II->setIsFromAST(); 517 return II; 518 } 519 520 unsigned Bits = ReadUnalignedLE16(d); 521 bool CPlusPlusOperatorKeyword = Bits & 0x01; 522 Bits >>= 1; 523 bool HasRevertedTokenIDToIdentifier = Bits & 0x01; 524 Bits >>= 1; 525 bool Poisoned = Bits & 0x01; 526 Bits >>= 1; 527 bool ExtensionToken = Bits & 0x01; 528 Bits >>= 1; 529 bool hasMacroDefinition = Bits & 0x01; 530 Bits >>= 1; 531 unsigned ObjCOrBuiltinID = Bits & 0x3FF; 532 Bits >>= 10; 533 534 assert(Bits == 0 && "Extra bits in the identifier?"); 535 DataLen -= 6; 536 537 // Build the IdentifierInfo itself and link the identifier ID with 538 // the new IdentifierInfo. 539 IdentifierInfo *II = KnownII; 540 if (!II) 541 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 542 Reader.SetIdentifierInfo(ID, II); 543 544 // Set or check the various bits in the IdentifierInfo structure. 545 // Token IDs are read-only. 546 if (HasRevertedTokenIDToIdentifier) 547 II->RevertTokenIDToIdentifier(); 548 II->setObjCOrBuiltinID(ObjCOrBuiltinID); 549 assert(II->isExtensionToken() == ExtensionToken && 550 "Incorrect extension token flag"); 551 (void)ExtensionToken; 552 if (Poisoned) 553 II->setIsPoisoned(true); 554 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && 555 "Incorrect C++ operator keyword flag"); 556 (void)CPlusPlusOperatorKeyword; 557 558 // If this identifier is a macro, deserialize the macro 559 // definition. 560 if (hasMacroDefinition) { 561 // FIXME: Check for conflicts? 562 uint32_t Offset = ReadUnalignedLE32(d); 563 Reader.SetIdentifierIsMacro(II, F, Offset); 564 DataLen -= 4; 565 } 566 567 // Read all of the declarations visible at global scope with this 568 // name. 569 if (DataLen > 0) { 570 SmallVector<uint32_t, 4> DeclIDs; 571 for (; DataLen > 0; DataLen -= 4) 572 DeclIDs.push_back(Reader.getGlobalDeclID(F, ReadUnalignedLE32(d))); 573 Reader.SetGloballyVisibleDecls(II, DeclIDs); 574 } 575 576 II->setIsFromAST(); 577 return II; 578} 579 580unsigned 581ASTDeclContextNameLookupTrait::ComputeHash(const DeclNameKey &Key) const { 582 llvm::FoldingSetNodeID ID; 583 ID.AddInteger(Key.Kind); 584 585 switch (Key.Kind) { 586 case DeclarationName::Identifier: 587 case DeclarationName::CXXLiteralOperatorName: 588 ID.AddString(((IdentifierInfo*)Key.Data)->getName()); 589 break; 590 case DeclarationName::ObjCZeroArgSelector: 591 case DeclarationName::ObjCOneArgSelector: 592 case DeclarationName::ObjCMultiArgSelector: 593 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); 594 break; 595 case DeclarationName::CXXOperatorName: 596 ID.AddInteger((OverloadedOperatorKind)Key.Data); 597 break; 598 case DeclarationName::CXXConstructorName: 599 case DeclarationName::CXXDestructorName: 600 case DeclarationName::CXXConversionFunctionName: 601 case DeclarationName::CXXUsingDirective: 602 break; 603 } 604 605 return ID.ComputeHash(); 606} 607 608ASTDeclContextNameLookupTrait::internal_key_type 609ASTDeclContextNameLookupTrait::GetInternalKey( 610 const external_key_type& Name) const { 611 DeclNameKey Key; 612 Key.Kind = Name.getNameKind(); 613 switch (Name.getNameKind()) { 614 case DeclarationName::Identifier: 615 Key.Data = (uint64_t)Name.getAsIdentifierInfo(); 616 break; 617 case DeclarationName::ObjCZeroArgSelector: 618 case DeclarationName::ObjCOneArgSelector: 619 case DeclarationName::ObjCMultiArgSelector: 620 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); 621 break; 622 case DeclarationName::CXXOperatorName: 623 Key.Data = Name.getCXXOverloadedOperator(); 624 break; 625 case DeclarationName::CXXLiteralOperatorName: 626 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); 627 break; 628 case DeclarationName::CXXConstructorName: 629 case DeclarationName::CXXDestructorName: 630 case DeclarationName::CXXConversionFunctionName: 631 case DeclarationName::CXXUsingDirective: 632 Key.Data = 0; 633 break; 634 } 635 636 return Key; 637} 638 639ASTDeclContextNameLookupTrait::external_key_type 640ASTDeclContextNameLookupTrait::GetExternalKey( 641 const internal_key_type& Key) const { 642 ASTContext &Context = Reader.getContext(); 643 switch (Key.Kind) { 644 case DeclarationName::Identifier: 645 return DeclarationName((IdentifierInfo*)Key.Data); 646 647 case DeclarationName::ObjCZeroArgSelector: 648 case DeclarationName::ObjCOneArgSelector: 649 case DeclarationName::ObjCMultiArgSelector: 650 return DeclarationName(Selector(Key.Data)); 651 652 case DeclarationName::CXXConstructorName: 653 return Context.DeclarationNames.getCXXConstructorName( 654 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 655 656 case DeclarationName::CXXDestructorName: 657 return Context.DeclarationNames.getCXXDestructorName( 658 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 659 660 case DeclarationName::CXXConversionFunctionName: 661 return Context.DeclarationNames.getCXXConversionFunctionName( 662 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 663 664 case DeclarationName::CXXOperatorName: 665 return Context.DeclarationNames.getCXXOperatorName( 666 (OverloadedOperatorKind)Key.Data); 667 668 case DeclarationName::CXXLiteralOperatorName: 669 return Context.DeclarationNames.getCXXLiteralOperatorName( 670 (IdentifierInfo*)Key.Data); 671 672 case DeclarationName::CXXUsingDirective: 673 return DeclarationName::getUsingDirectiveName(); 674 } 675 676 llvm_unreachable("Invalid Name Kind ?"); 677} 678 679std::pair<unsigned, unsigned> 680ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char*& d) { 681 using namespace clang::io; 682 unsigned KeyLen = ReadUnalignedLE16(d); 683 unsigned DataLen = ReadUnalignedLE16(d); 684 return std::make_pair(KeyLen, DataLen); 685} 686 687ASTDeclContextNameLookupTrait::internal_key_type 688ASTDeclContextNameLookupTrait::ReadKey(const unsigned char* d, unsigned) { 689 using namespace clang::io; 690 691 DeclNameKey Key; 692 Key.Kind = (DeclarationName::NameKind)*d++; 693 switch (Key.Kind) { 694 case DeclarationName::Identifier: 695 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 696 break; 697 case DeclarationName::ObjCZeroArgSelector: 698 case DeclarationName::ObjCOneArgSelector: 699 case DeclarationName::ObjCMultiArgSelector: 700 Key.Data = 701 (uint64_t)Reader.getLocalSelector(F, ReadUnalignedLE32(d)) 702 .getAsOpaquePtr(); 703 break; 704 case DeclarationName::CXXOperatorName: 705 Key.Data = *d++; // OverloadedOperatorKind 706 break; 707 case DeclarationName::CXXLiteralOperatorName: 708 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 709 break; 710 case DeclarationName::CXXConstructorName: 711 case DeclarationName::CXXDestructorName: 712 case DeclarationName::CXXConversionFunctionName: 713 case DeclarationName::CXXUsingDirective: 714 Key.Data = 0; 715 break; 716 } 717 718 return Key; 719} 720 721ASTDeclContextNameLookupTrait::data_type 722ASTDeclContextNameLookupTrait::ReadData(internal_key_type, 723 const unsigned char* d, 724 unsigned DataLen) { 725 using namespace clang::io; 726 unsigned NumDecls = ReadUnalignedLE16(d); 727 DeclID *Start = (DeclID *)d; 728 return std::make_pair(Start, Start + NumDecls); 729} 730 731bool ASTReader::ReadDeclContextStorage(Module &M, 732 llvm::BitstreamCursor &Cursor, 733 const std::pair<uint64_t, uint64_t> &Offsets, 734 DeclContextInfo &Info) { 735 SavedStreamPosition SavedPosition(Cursor); 736 // First the lexical decls. 737 if (Offsets.first != 0) { 738 Cursor.JumpToBit(Offsets.first); 739 740 RecordData Record; 741 const char *Blob; 742 unsigned BlobLen; 743 unsigned Code = Cursor.ReadCode(); 744 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 745 if (RecCode != DECL_CONTEXT_LEXICAL) { 746 Error("Expected lexical block"); 747 return true; 748 } 749 750 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob); 751 Info.NumLexicalDecls = BlobLen / sizeof(KindDeclIDPair); 752 } 753 754 // Now the lookup table. 755 if (Offsets.second != 0) { 756 Cursor.JumpToBit(Offsets.second); 757 758 RecordData Record; 759 const char *Blob; 760 unsigned BlobLen; 761 unsigned Code = Cursor.ReadCode(); 762 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 763 if (RecCode != DECL_CONTEXT_VISIBLE) { 764 Error("Expected visible lookup table block"); 765 return true; 766 } 767 Info.NameLookupTableData 768 = ASTDeclContextNameLookupTable::Create( 769 (const unsigned char *)Blob + Record[0], 770 (const unsigned char *)Blob, 771 ASTDeclContextNameLookupTrait(*this, M)); 772 } 773 774 return false; 775} 776 777void ASTReader::Error(StringRef Msg) { 778 Error(diag::err_fe_pch_malformed, Msg); 779} 780 781void ASTReader::Error(unsigned DiagID, 782 StringRef Arg1, StringRef Arg2) { 783 if (Diags.isDiagnosticInFlight()) 784 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2); 785 else 786 Diag(DiagID) << Arg1 << Arg2; 787} 788 789/// \brief Tell the AST listener about the predefines buffers in the chain. 790bool ASTReader::CheckPredefinesBuffers() { 791 if (Listener) 792 return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, 793 ActualOriginalFileName, 794 SuggestedPredefines, 795 FileMgr); 796 return false; 797} 798 799//===----------------------------------------------------------------------===// 800// Source Manager Deserialization 801//===----------------------------------------------------------------------===// 802 803/// \brief Read the line table in the source manager block. 804/// \returns true if there was an error. 805bool ASTReader::ParseLineTable(Module &F, 806 SmallVectorImpl<uint64_t> &Record) { 807 unsigned Idx = 0; 808 LineTableInfo &LineTable = SourceMgr.getLineTable(); 809 810 // Parse the file names 811 std::map<int, int> FileIDs; 812 for (int I = 0, N = Record[Idx++]; I != N; ++I) { 813 // Extract the file name 814 unsigned FilenameLen = Record[Idx++]; 815 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); 816 Idx += FilenameLen; 817 MaybeAddSystemRootToFilename(Filename); 818 FileIDs[I] = LineTable.getLineTableFilenameID(Filename); 819 } 820 821 // Parse the line entries 822 std::vector<LineEntry> Entries; 823 while (Idx < Record.size()) { 824 int FID = Record[Idx++]; 825 assert(FID >= 0 && "Serialized line entries for non-local file."); 826 // Remap FileID from 1-based old view. 827 FID += F.SLocEntryBaseID - 1; 828 829 // Extract the line entries 830 unsigned NumEntries = Record[Idx++]; 831 assert(NumEntries && "Numentries is 00000"); 832 Entries.clear(); 833 Entries.reserve(NumEntries); 834 for (unsigned I = 0; I != NumEntries; ++I) { 835 unsigned FileOffset = Record[Idx++]; 836 unsigned LineNo = Record[Idx++]; 837 int FilenameID = FileIDs[Record[Idx++]]; 838 SrcMgr::CharacteristicKind FileKind 839 = (SrcMgr::CharacteristicKind)Record[Idx++]; 840 unsigned IncludeOffset = Record[Idx++]; 841 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, 842 FileKind, IncludeOffset)); 843 } 844 LineTable.AddEntry(FID, Entries); 845 } 846 847 return false; 848} 849 850namespace { 851 852class ASTStatData { 853public: 854 const ino_t ino; 855 const dev_t dev; 856 const mode_t mode; 857 const time_t mtime; 858 const off_t size; 859 860 ASTStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 861 : ino(i), dev(d), mode(mo), mtime(m), size(s) {} 862}; 863 864class ASTStatLookupTrait { 865 public: 866 typedef const char *external_key_type; 867 typedef const char *internal_key_type; 868 869 typedef ASTStatData data_type; 870 871 static unsigned ComputeHash(const char *path) { 872 return llvm::HashString(path); 873 } 874 875 static internal_key_type GetInternalKey(const char *path) { return path; } 876 877 static bool EqualKey(internal_key_type a, internal_key_type b) { 878 return strcmp(a, b) == 0; 879 } 880 881 static std::pair<unsigned, unsigned> 882 ReadKeyDataLength(const unsigned char*& d) { 883 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 884 unsigned DataLen = (unsigned) *d++; 885 return std::make_pair(KeyLen + 1, DataLen); 886 } 887 888 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 889 return (const char *)d; 890 } 891 892 static data_type ReadData(const internal_key_type, const unsigned char *d, 893 unsigned /*DataLen*/) { 894 using namespace clang::io; 895 896 ino_t ino = (ino_t) ReadUnalignedLE32(d); 897 dev_t dev = (dev_t) ReadUnalignedLE32(d); 898 mode_t mode = (mode_t) ReadUnalignedLE16(d); 899 time_t mtime = (time_t) ReadUnalignedLE64(d); 900 off_t size = (off_t) ReadUnalignedLE64(d); 901 return data_type(ino, dev, mode, mtime, size); 902 } 903}; 904 905/// \brief stat() cache for precompiled headers. 906/// 907/// This cache is very similar to the stat cache used by pretokenized 908/// headers. 909class ASTStatCache : public FileSystemStatCache { 910 typedef OnDiskChainedHashTable<ASTStatLookupTrait> CacheTy; 911 CacheTy *Cache; 912 913 unsigned &NumStatHits, &NumStatMisses; 914public: 915 ASTStatCache(const unsigned char *Buckets, const unsigned char *Base, 916 unsigned &NumStatHits, unsigned &NumStatMisses) 917 : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { 918 Cache = CacheTy::Create(Buckets, Base); 919 } 920 921 ~ASTStatCache() { delete Cache; } 922 923 LookupResult getStat(const char *Path, struct stat &StatBuf, 924 int *FileDescriptor) { 925 // Do the lookup for the file's data in the AST file. 926 CacheTy::iterator I = Cache->find(Path); 927 928 // If we don't get a hit in the AST file just forward to 'stat'. 929 if (I == Cache->end()) { 930 ++NumStatMisses; 931 return statChained(Path, StatBuf, FileDescriptor); 932 } 933 934 ++NumStatHits; 935 ASTStatData Data = *I; 936 937 StatBuf.st_ino = Data.ino; 938 StatBuf.st_dev = Data.dev; 939 StatBuf.st_mtime = Data.mtime; 940 StatBuf.st_mode = Data.mode; 941 StatBuf.st_size = Data.size; 942 return CacheExists; 943 } 944}; 945} // end anonymous namespace 946 947 948/// \brief Read a source manager block 949ASTReader::ASTReadResult ASTReader::ReadSourceManagerBlock(Module &F) { 950 using namespace SrcMgr; 951 952 llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; 953 954 // Set the source-location entry cursor to the current position in 955 // the stream. This cursor will be used to read the contents of the 956 // source manager block initially, and then lazily read 957 // source-location entries as needed. 958 SLocEntryCursor = F.Stream; 959 960 // The stream itself is going to skip over the source manager block. 961 if (F.Stream.SkipBlock()) { 962 Error("malformed block record in AST file"); 963 return Failure; 964 } 965 966 // Enter the source manager block. 967 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { 968 Error("malformed source manager block record in AST file"); 969 return Failure; 970 } 971 972 RecordData Record; 973 while (true) { 974 unsigned Code = SLocEntryCursor.ReadCode(); 975 if (Code == llvm::bitc::END_BLOCK) { 976 if (SLocEntryCursor.ReadBlockEnd()) { 977 Error("error at end of Source Manager block in AST file"); 978 return Failure; 979 } 980 return Success; 981 } 982 983 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 984 // No known subblocks, always skip them. 985 SLocEntryCursor.ReadSubBlockID(); 986 if (SLocEntryCursor.SkipBlock()) { 987 Error("malformed block record in AST file"); 988 return Failure; 989 } 990 continue; 991 } 992 993 if (Code == llvm::bitc::DEFINE_ABBREV) { 994 SLocEntryCursor.ReadAbbrevRecord(); 995 continue; 996 } 997 998 // Read a record. 999 const char *BlobStart; 1000 unsigned BlobLen; 1001 Record.clear(); 1002 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1003 default: // Default behavior: ignore. 1004 break; 1005 1006 case SM_SLOC_FILE_ENTRY: 1007 case SM_SLOC_BUFFER_ENTRY: 1008 case SM_SLOC_EXPANSION_ENTRY: 1009 // Once we hit one of the source location entries, we're done. 1010 return Success; 1011 } 1012 } 1013} 1014 1015/// \brief If a header file is not found at the path that we expect it to be 1016/// and the PCH file was moved from its original location, try to resolve the 1017/// file by assuming that header+PCH were moved together and the header is in 1018/// the same place relative to the PCH. 1019static std::string 1020resolveFileRelativeToOriginalDir(const std::string &Filename, 1021 const std::string &OriginalDir, 1022 const std::string &CurrDir) { 1023 assert(OriginalDir != CurrDir && 1024 "No point trying to resolve the file if the PCH dir didn't change"); 1025 using namespace llvm::sys; 1026 llvm::SmallString<128> filePath(Filename); 1027 fs::make_absolute(filePath); 1028 assert(path::is_absolute(OriginalDir)); 1029 llvm::SmallString<128> currPCHPath(CurrDir); 1030 1031 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), 1032 fileDirE = path::end(path::parent_path(filePath)); 1033 path::const_iterator origDirI = path::begin(OriginalDir), 1034 origDirE = path::end(OriginalDir); 1035 // Skip the common path components from filePath and OriginalDir. 1036 while (fileDirI != fileDirE && origDirI != origDirE && 1037 *fileDirI == *origDirI) { 1038 ++fileDirI; 1039 ++origDirI; 1040 } 1041 for (; origDirI != origDirE; ++origDirI) 1042 path::append(currPCHPath, ".."); 1043 path::append(currPCHPath, fileDirI, fileDirE); 1044 path::append(currPCHPath, path::filename(Filename)); 1045 return currPCHPath.str(); 1046} 1047 1048/// \brief Read in the source location entry with the given ID. 1049ASTReader::ASTReadResult ASTReader::ReadSLocEntryRecord(int ID) { 1050 if (ID == 0) 1051 return Success; 1052 1053 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { 1054 Error("source location entry ID out-of-range for AST file"); 1055 return Failure; 1056 } 1057 1058 Module *F = GlobalSLocEntryMap.find(-ID)->second; 1059 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]); 1060 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 1061 unsigned BaseOffset = F->SLocEntryBaseOffset; 1062 1063 ++NumSLocEntriesRead; 1064 unsigned Code = SLocEntryCursor.ReadCode(); 1065 if (Code == llvm::bitc::END_BLOCK || 1066 Code == llvm::bitc::ENTER_SUBBLOCK || 1067 Code == llvm::bitc::DEFINE_ABBREV) { 1068 Error("incorrectly-formatted source location entry in AST file"); 1069 return Failure; 1070 } 1071 1072 RecordData Record; 1073 const char *BlobStart; 1074 unsigned BlobLen; 1075 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1076 default: 1077 Error("incorrectly-formatted source location entry in AST file"); 1078 return Failure; 1079 1080 case SM_SLOC_FILE_ENTRY: { 1081 std::string Filename(BlobStart, BlobStart + BlobLen); 1082 MaybeAddSystemRootToFilename(Filename); 1083 const FileEntry *File = FileMgr.getFile(Filename); 1084 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1085 OriginalDir != CurrentDir) { 1086 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1087 OriginalDir, 1088 CurrentDir); 1089 if (!resolved.empty()) 1090 File = FileMgr.getFile(resolved); 1091 } 1092 if (File == 0) 1093 File = FileMgr.getVirtualFile(Filename, (off_t)Record[4], 1094 (time_t)Record[5]); 1095 if (File == 0) { 1096 std::string ErrorStr = "could not find file '"; 1097 ErrorStr += Filename; 1098 ErrorStr += "' referenced by AST file"; 1099 Error(ErrorStr.c_str()); 1100 return Failure; 1101 } 1102 1103 if (Record.size() < 6) { 1104 Error("source location entry is incorrect"); 1105 return Failure; 1106 } 1107 1108 if (!DisableValidation && 1109 ((off_t)Record[4] != File->getSize() 1110#if !defined(LLVM_ON_WIN32) 1111 // In our regression testing, the Windows file system seems to 1112 // have inconsistent modification times that sometimes 1113 // erroneously trigger this error-handling path. 1114 || (time_t)Record[5] != File->getModificationTime() 1115#endif 1116 )) { 1117 Error(diag::err_fe_pch_file_modified, Filename); 1118 return Failure; 1119 } 1120 1121 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); 1122 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) { 1123 // This is the module's main file. 1124 IncludeLoc = getImportLocation(F); 1125 } 1126 FileID FID = SourceMgr.createFileID(File, IncludeLoc, 1127 (SrcMgr::CharacteristicKind)Record[2], 1128 ID, BaseOffset + Record[0]); 1129 SrcMgr::FileInfo &FileInfo = 1130 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()); 1131 FileInfo.NumCreatedFIDs = Record[6]; 1132 if (Record[3]) 1133 FileInfo.setHasLineDirectives(); 1134 1135 break; 1136 } 1137 1138 case SM_SLOC_BUFFER_ENTRY: { 1139 const char *Name = BlobStart; 1140 unsigned Offset = Record[0]; 1141 unsigned Code = SLocEntryCursor.ReadCode(); 1142 Record.clear(); 1143 unsigned RecCode 1144 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1145 1146 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1147 Error("AST record has invalid code"); 1148 return Failure; 1149 } 1150 1151 llvm::MemoryBuffer *Buffer 1152 = llvm::MemoryBuffer::getMemBuffer(StringRef(BlobStart, BlobLen - 1), 1153 Name); 1154 FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, 1155 BaseOffset + Offset); 1156 1157 if (strcmp(Name, "<built-in>") == 0) { 1158 PCHPredefinesBlock Block = { 1159 BufferID, 1160 StringRef(BlobStart, BlobLen - 1) 1161 }; 1162 PCHPredefinesBuffers.push_back(Block); 1163 } 1164 1165 break; 1166 } 1167 1168 case SM_SLOC_EXPANSION_ENTRY: { 1169 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); 1170 SourceMgr.createExpansionLoc(SpellingLoc, 1171 ReadSourceLocation(*F, Record[2]), 1172 ReadSourceLocation(*F, Record[3]), 1173 Record[4], 1174 ID, 1175 BaseOffset + Record[0]); 1176 break; 1177 } 1178 } 1179 1180 return Success; 1181} 1182 1183/// \brief Find the location where the module F is imported. 1184SourceLocation ASTReader::getImportLocation(Module *F) { 1185 if (F->ImportLoc.isValid()) 1186 return F->ImportLoc; 1187 1188 // Otherwise we have a PCH. It's considered to be "imported" at the first 1189 // location of its includer. 1190 if (F->ImportedBy.empty() || !F->ImportedBy[0]) { 1191 // Main file is the importer. We assume that it is the first entry in the 1192 // entry table. We can't ask the manager, because at the time of PCH loading 1193 // the main file entry doesn't exist yet. 1194 // The very first entry is the invalid instantiation loc, which takes up 1195 // offsets 0 and 1. 1196 return SourceLocation::getFromRawEncoding(2U); 1197 } 1198 //return F->Loaders[0]->FirstLoc; 1199 return F->ImportedBy[0]->FirstLoc; 1200} 1201 1202/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the 1203/// specified cursor. Read the abbreviations that are at the top of the block 1204/// and then leave the cursor pointing into the block. 1205bool ASTReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, 1206 unsigned BlockID) { 1207 if (Cursor.EnterSubBlock(BlockID)) { 1208 Error("malformed block record in AST file"); 1209 return Failure; 1210 } 1211 1212 while (true) { 1213 uint64_t Offset = Cursor.GetCurrentBitNo(); 1214 unsigned Code = Cursor.ReadCode(); 1215 1216 // We expect all abbrevs to be at the start of the block. 1217 if (Code != llvm::bitc::DEFINE_ABBREV) { 1218 Cursor.JumpToBit(Offset); 1219 return false; 1220 } 1221 Cursor.ReadAbbrevRecord(); 1222 } 1223} 1224 1225void ASTReader::ReadMacroRecord(Module &F, uint64_t Offset) { 1226 llvm::BitstreamCursor &Stream = F.MacroCursor; 1227 1228 // Keep track of where we are in the stream, then jump back there 1229 // after reading this macro. 1230 SavedStreamPosition SavedPosition(Stream); 1231 1232 Stream.JumpToBit(Offset); 1233 RecordData Record; 1234 SmallVector<IdentifierInfo*, 16> MacroArgs; 1235 MacroInfo *Macro = 0; 1236 1237 while (true) { 1238 unsigned Code = Stream.ReadCode(); 1239 switch (Code) { 1240 case llvm::bitc::END_BLOCK: 1241 return; 1242 1243 case llvm::bitc::ENTER_SUBBLOCK: 1244 // No known subblocks, always skip them. 1245 Stream.ReadSubBlockID(); 1246 if (Stream.SkipBlock()) { 1247 Error("malformed block record in AST file"); 1248 return; 1249 } 1250 continue; 1251 1252 case llvm::bitc::DEFINE_ABBREV: 1253 Stream.ReadAbbrevRecord(); 1254 continue; 1255 default: break; 1256 } 1257 1258 // Read a record. 1259 const char *BlobStart = 0; 1260 unsigned BlobLen = 0; 1261 Record.clear(); 1262 PreprocessorRecordTypes RecType = 1263 (PreprocessorRecordTypes)Stream.ReadRecord(Code, Record, BlobStart, 1264 BlobLen); 1265 switch (RecType) { 1266 case PP_MACRO_OBJECT_LIKE: 1267 case PP_MACRO_FUNCTION_LIKE: { 1268 // If we already have a macro, that means that we've hit the end 1269 // of the definition of the macro we were looking for. We're 1270 // done. 1271 if (Macro) 1272 return; 1273 1274 IdentifierInfo *II = getLocalIdentifier(F, Record[0]); 1275 if (II == 0) { 1276 Error("macro must have a name in AST file"); 1277 return; 1278 } 1279 SourceLocation Loc = ReadSourceLocation(F, Record[1]); 1280 bool isUsed = Record[2]; 1281 1282 MacroInfo *MI = PP.AllocateMacroInfo(Loc); 1283 MI->setIsUsed(isUsed); 1284 MI->setIsFromAST(); 1285 1286 unsigned NextIndex = 3; 1287 MI->setExportLocation(ReadSourceLocation(F, Record, NextIndex)); 1288 1289 if (RecType == PP_MACRO_FUNCTION_LIKE) { 1290 // Decode function-like macro info. 1291 bool isC99VarArgs = Record[NextIndex++]; 1292 bool isGNUVarArgs = Record[NextIndex++]; 1293 MacroArgs.clear(); 1294 unsigned NumArgs = Record[NextIndex++]; 1295 for (unsigned i = 0; i != NumArgs; ++i) 1296 MacroArgs.push_back(getLocalIdentifier(F, Record[NextIndex++])); 1297 1298 // Install function-like macro info. 1299 MI->setIsFunctionLike(); 1300 if (isC99VarArgs) MI->setIsC99Varargs(); 1301 if (isGNUVarArgs) MI->setIsGNUVarargs(); 1302 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), 1303 PP.getPreprocessorAllocator()); 1304 } 1305 1306 // Finally, install the macro. 1307 PP.setMacroInfo(II, MI); 1308 1309 // Remember that we saw this macro last so that we add the tokens that 1310 // form its body to it. 1311 Macro = MI; 1312 1313 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() && 1314 Record[NextIndex]) { 1315 // We have a macro definition. Register the association 1316 PreprocessedEntityID 1317 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]); 1318 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); 1319 PPRec.RegisterMacroDefinition(Macro, 1320 PPRec.getPPEntityID(GlobalID-1, /*isLoaded=*/true)); 1321 } 1322 1323 ++NumMacrosRead; 1324 break; 1325 } 1326 1327 case PP_TOKEN: { 1328 // If we see a TOKEN before a PP_MACRO_*, then the file is 1329 // erroneous, just pretend we didn't see this. 1330 if (Macro == 0) break; 1331 1332 Token Tok; 1333 Tok.startToken(); 1334 Tok.setLocation(ReadSourceLocation(F, Record[0])); 1335 Tok.setLength(Record[1]); 1336 if (IdentifierInfo *II = getLocalIdentifier(F, Record[2])) 1337 Tok.setIdentifierInfo(II); 1338 Tok.setKind((tok::TokenKind)Record[3]); 1339 Tok.setFlag((Token::TokenFlags)Record[4]); 1340 Macro->AddTokenToBody(Tok); 1341 break; 1342 } 1343 } 1344 } 1345 1346 return; 1347} 1348 1349PreprocessedEntity *ASTReader::LoadPreprocessedEntity(Module &F) { 1350 unsigned Code = F.PreprocessorDetailCursor.ReadCode(); 1351 switch (Code) { 1352 case llvm::bitc::END_BLOCK: 1353 return 0; 1354 1355 case llvm::bitc::ENTER_SUBBLOCK: 1356 Error("unexpected subblock record in preprocessor detail block"); 1357 return 0; 1358 1359 case llvm::bitc::DEFINE_ABBREV: 1360 Error("unexpected abbrevation record in preprocessor detail block"); 1361 return 0; 1362 1363 default: 1364 break; 1365 } 1366 1367 if (!PP.getPreprocessingRecord()) { 1368 Error("no preprocessing record"); 1369 return 0; 1370 } 1371 1372 // Read the record. 1373 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); 1374 const char *BlobStart = 0; 1375 unsigned BlobLen = 0; 1376 RecordData Record; 1377 PreprocessorDetailRecordTypes RecType = 1378 (PreprocessorDetailRecordTypes)F.PreprocessorDetailCursor.ReadRecord( 1379 Code, Record, BlobStart, BlobLen); 1380 switch (RecType) { 1381 case PPD_MACRO_EXPANSION: { 1382 bool isBuiltin = Record[3]; 1383 MacroExpansion *ME; 1384 if (isBuiltin) { 1385 ME = new (PPRec) MacroExpansion(getLocalIdentifier(F, Record[4]), 1386 SourceRange(ReadSourceLocation(F, Record[1]), 1387 ReadSourceLocation(F, Record[2]))); 1388 } else { 1389 PreprocessedEntityID 1390 GlobalID = getGlobalPreprocessedEntityID(F, Record[4]); 1391 ME = new (PPRec) MacroExpansion( 1392 cast<MacroDefinition>(PPRec.getLoadedPreprocessedEntity(GlobalID-1)), 1393 SourceRange(ReadSourceLocation(F, Record[1]), 1394 ReadSourceLocation(F, Record[2]))); 1395 } 1396 return ME; 1397 } 1398 1399 case PPD_MACRO_DEFINITION: { 1400 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1401 1402 // Decode the identifier info and then check again; if the macro is 1403 // still defined and associated with the identifier, 1404 IdentifierInfo *II = getLocalIdentifier(F, Record[3]); 1405 MacroDefinition *MD 1406 = new (PPRec) MacroDefinition(II, 1407 ReadSourceLocation(F, Record[4]), 1408 SourceRange( 1409 ReadSourceLocation(F, Record[1]), 1410 ReadSourceLocation(F, Record[2]))); 1411 1412 if (DeserializationListener) 1413 DeserializationListener->MacroDefinitionRead(GlobalID, MD); 1414 1415 return MD; 1416 } 1417 1418 case PPD_INCLUSION_DIRECTIVE: { 1419 const char *FullFileNameStart = BlobStart + Record[3]; 1420 const FileEntry *File 1421 = PP.getFileManager().getFile(StringRef(FullFileNameStart, 1422 BlobLen - Record[3])); 1423 1424 // FIXME: Stable encoding 1425 InclusionDirective::InclusionKind Kind 1426 = static_cast<InclusionDirective::InclusionKind>(Record[5]); 1427 InclusionDirective *ID 1428 = new (PPRec) InclusionDirective(PPRec, Kind, 1429 StringRef(BlobStart, Record[3]), 1430 Record[4], 1431 File, 1432 SourceRange(ReadSourceLocation(F, Record[1]), 1433 ReadSourceLocation(F, Record[2]))); 1434 return ID; 1435 } 1436 } 1437 1438 Error("invalid offset in preprocessor detail block"); 1439 return 0; 1440} 1441 1442PreprocessedEntityID 1443ASTReader::getGlobalPreprocessedEntityID(Module &M, unsigned LocalID) { 1444 ContinuousRangeMap<uint32_t, int, 2>::iterator 1445 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS); 1446 assert(I != M.PreprocessedEntityRemap.end() 1447 && "Invalid index into preprocessed entity index remap"); 1448 1449 return LocalID + I->second; 1450} 1451 1452unsigned HeaderFileInfoTrait::ComputeHash(const char *path) { 1453 return llvm::HashString(llvm::sys::path::filename(path)); 1454} 1455 1456HeaderFileInfoTrait::internal_key_type 1457HeaderFileInfoTrait::GetInternalKey(const char *path) { return path; } 1458 1459bool HeaderFileInfoTrait::EqualKey(internal_key_type a, internal_key_type b) { 1460 if (strcmp(a, b) == 0) 1461 return true; 1462 1463 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1464 return false; 1465 1466 // The file names match, but the path names don't. stat() the files to 1467 // see if they are the same. 1468 struct stat StatBufA, StatBufB; 1469 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1470 return false; 1471 1472 return StatBufA.st_ino == StatBufB.st_ino; 1473} 1474 1475std::pair<unsigned, unsigned> 1476HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) { 1477 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1478 unsigned DataLen = (unsigned) *d++; 1479 return std::make_pair(KeyLen + 1, DataLen); 1480} 1481 1482HeaderFileInfoTrait::data_type 1483HeaderFileInfoTrait::ReadData(const internal_key_type, const unsigned char *d, 1484 unsigned DataLen) { 1485 const unsigned char *End = d + DataLen; 1486 using namespace clang::io; 1487 HeaderFileInfo HFI; 1488 unsigned Flags = *d++; 1489 HFI.isImport = (Flags >> 5) & 0x01; 1490 HFI.isPragmaOnce = (Flags >> 4) & 0x01; 1491 HFI.DirInfo = (Flags >> 2) & 0x03; 1492 HFI.Resolved = (Flags >> 1) & 0x01; 1493 HFI.IndexHeaderMapHeader = Flags & 0x01; 1494 HFI.NumIncludes = ReadUnalignedLE16(d); 1495 HFI.ControllingMacroID = Reader.getGlobalDeclID(M, ReadUnalignedLE32(d)); 1496 if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { 1497 // The framework offset is 1 greater than the actual offset, 1498 // since 0 is used as an indicator for "no framework name". 1499 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); 1500 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); 1501 } 1502 1503 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1504 (void)End; 1505 1506 // This HeaderFileInfo was externally loaded. 1507 HFI.External = true; 1508 return HFI; 1509} 1510 1511void ASTReader::SetIdentifierIsMacro(IdentifierInfo *II, Module &F, 1512 uint64_t LocalOffset) { 1513 // Note that this identifier has a macro definition. 1514 II->setHasMacroDefinition(true); 1515 1516 // Adjust the offset to a global offset. 1517 UnreadMacroRecordOffsets[II] = F.GlobalBitOffset + LocalOffset; 1518} 1519 1520void ASTReader::ReadDefinedMacros() { 1521 for (ModuleReverseIterator I = ModuleMgr.rbegin(), 1522 E = ModuleMgr.rend(); I != E; ++I) { 1523 llvm::BitstreamCursor &MacroCursor = (*I)->MacroCursor; 1524 1525 // If there was no preprocessor block, skip this file. 1526 if (!MacroCursor.getBitStreamReader()) 1527 continue; 1528 1529 llvm::BitstreamCursor Cursor = MacroCursor; 1530 Cursor.JumpToBit((*I)->MacroStartOffset); 1531 1532 RecordData Record; 1533 while (true) { 1534 unsigned Code = Cursor.ReadCode(); 1535 if (Code == llvm::bitc::END_BLOCK) 1536 break; 1537 1538 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1539 // No known subblocks, always skip them. 1540 Cursor.ReadSubBlockID(); 1541 if (Cursor.SkipBlock()) { 1542 Error("malformed block record in AST file"); 1543 return; 1544 } 1545 continue; 1546 } 1547 1548 if (Code == llvm::bitc::DEFINE_ABBREV) { 1549 Cursor.ReadAbbrevRecord(); 1550 continue; 1551 } 1552 1553 // Read a record. 1554 const char *BlobStart; 1555 unsigned BlobLen; 1556 Record.clear(); 1557 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1558 default: // Default behavior: ignore. 1559 break; 1560 1561 case PP_MACRO_OBJECT_LIKE: 1562 case PP_MACRO_FUNCTION_LIKE: 1563 getLocalIdentifier(**I, Record[0]); 1564 break; 1565 1566 case PP_TOKEN: 1567 // Ignore tokens. 1568 break; 1569 } 1570 } 1571 } 1572 1573 // Drain the unread macro-record offsets map. 1574 while (!UnreadMacroRecordOffsets.empty()) 1575 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1576} 1577 1578void ASTReader::LoadMacroDefinition( 1579 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1580 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1581 uint64_t Offset = Pos->second; 1582 UnreadMacroRecordOffsets.erase(Pos); 1583 1584 RecordLocation Loc = getLocalBitOffset(Offset); 1585 ReadMacroRecord(*Loc.F, Loc.Offset); 1586} 1587 1588void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1589 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1590 = UnreadMacroRecordOffsets.find(II); 1591 LoadMacroDefinition(Pos); 1592} 1593 1594const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { 1595 std::string Filename = filenameStrRef; 1596 MaybeAddSystemRootToFilename(Filename); 1597 const FileEntry *File = FileMgr.getFile(Filename); 1598 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1599 OriginalDir != CurrentDir) { 1600 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1601 OriginalDir, 1602 CurrentDir); 1603 if (!resolved.empty()) 1604 File = FileMgr.getFile(resolved); 1605 } 1606 1607 return File; 1608} 1609 1610/// \brief If we are loading a relocatable PCH file, and the filename is 1611/// not an absolute path, add the system root to the beginning of the file 1612/// name. 1613void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1614 // If this is not a relocatable PCH file, there's nothing to do. 1615 if (!RelocatablePCH) 1616 return; 1617 1618 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1619 return; 1620 1621 if (isysroot.empty()) { 1622 // If no system root was given, default to '/' 1623 Filename.insert(Filename.begin(), '/'); 1624 return; 1625 } 1626 1627 unsigned Length = isysroot.size(); 1628 if (isysroot[Length - 1] != '/') 1629 Filename.insert(Filename.begin(), '/'); 1630 1631 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); 1632} 1633 1634ASTReader::ASTReadResult 1635ASTReader::ReadASTBlock(Module &F) { 1636 llvm::BitstreamCursor &Stream = F.Stream; 1637 1638 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1639 Error("malformed block record in AST file"); 1640 return Failure; 1641 } 1642 1643 // Read all of the records and blocks for the ASt file. 1644 RecordData Record; 1645 while (!Stream.AtEndOfStream()) { 1646 unsigned Code = Stream.ReadCode(); 1647 if (Code == llvm::bitc::END_BLOCK) { 1648 if (Stream.ReadBlockEnd()) { 1649 Error("error at end of module block in AST file"); 1650 return Failure; 1651 } 1652 1653 return Success; 1654 } 1655 1656 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1657 switch (Stream.ReadSubBlockID()) { 1658 case DECLTYPES_BLOCK_ID: 1659 // We lazily load the decls block, but we want to set up the 1660 // DeclsCursor cursor to point into it. Clone our current bitcode 1661 // cursor to it, enter the block and read the abbrevs in that block. 1662 // With the main cursor, we just skip over it. 1663 F.DeclsCursor = Stream; 1664 if (Stream.SkipBlock() || // Skip with the main cursor. 1665 // Read the abbrevs. 1666 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1667 Error("malformed block record in AST file"); 1668 return Failure; 1669 } 1670 break; 1671 1672 case DECL_UPDATES_BLOCK_ID: 1673 if (Stream.SkipBlock()) { 1674 Error("malformed block record in AST file"); 1675 return Failure; 1676 } 1677 break; 1678 1679 case PREPROCESSOR_BLOCK_ID: 1680 F.MacroCursor = Stream; 1681 if (!PP.getExternalSource()) 1682 PP.setExternalSource(this); 1683 1684 if (Stream.SkipBlock() || 1685 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1686 Error("malformed block record in AST file"); 1687 return Failure; 1688 } 1689 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1690 break; 1691 1692 case PREPROCESSOR_DETAIL_BLOCK_ID: 1693 F.PreprocessorDetailCursor = Stream; 1694 if (Stream.SkipBlock() || 1695 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1696 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1697 Error("malformed preprocessor detail record in AST file"); 1698 return Failure; 1699 } 1700 F.PreprocessorDetailStartOffset 1701 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1702 1703 if (!PP.getPreprocessingRecord()) 1704 PP.createPreprocessingRecord(true); 1705 if (!PP.getPreprocessingRecord()->getExternalSource()) 1706 PP.getPreprocessingRecord()->SetExternalSource(*this); 1707 break; 1708 1709 case SOURCE_MANAGER_BLOCK_ID: 1710 switch (ReadSourceManagerBlock(F)) { 1711 case Success: 1712 break; 1713 1714 case Failure: 1715 Error("malformed source manager block in AST file"); 1716 return Failure; 1717 1718 case IgnorePCH: 1719 return IgnorePCH; 1720 } 1721 break; 1722 } 1723 continue; 1724 } 1725 1726 if (Code == llvm::bitc::DEFINE_ABBREV) { 1727 Stream.ReadAbbrevRecord(); 1728 continue; 1729 } 1730 1731 // Read and process a record. 1732 Record.clear(); 1733 const char *BlobStart = 0; 1734 unsigned BlobLen = 0; 1735 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 1736 &BlobStart, &BlobLen)) { 1737 default: // Default behavior: ignore. 1738 break; 1739 1740 case METADATA: { 1741 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 1742 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 1743 : diag::warn_pch_version_too_new); 1744 return IgnorePCH; 1745 } 1746 1747 RelocatablePCH = Record[4]; 1748 if (Listener) { 1749 std::string TargetTriple(BlobStart, BlobLen); 1750 if (Listener->ReadTargetTriple(TargetTriple)) 1751 return IgnorePCH; 1752 } 1753 break; 1754 } 1755 1756 case IMPORTS: { 1757 // Load each of the imported PCH files. 1758 unsigned Idx = 0, N = Record.size(); 1759 while (Idx < N) { 1760 // Read information about the AST file. 1761 ModuleKind ImportedKind = (ModuleKind)Record[Idx++]; 1762 unsigned Length = Record[Idx++]; 1763 llvm::SmallString<128> ImportedFile(Record.begin() + Idx, 1764 Record.begin() + Idx + Length); 1765 Idx += Length; 1766 1767 // Load the AST file. 1768 switch(ReadASTCore(ImportedFile, ImportedKind, &F)) { 1769 case Failure: return Failure; 1770 // If we have to ignore the dependency, we'll have to ignore this too. 1771 case IgnorePCH: return IgnorePCH; 1772 case Success: break; 1773 } 1774 } 1775 break; 1776 } 1777 1778 case TYPE_OFFSET: { 1779 if (F.LocalNumTypes != 0) { 1780 Error("duplicate TYPE_OFFSET record in AST file"); 1781 return Failure; 1782 } 1783 F.TypeOffsets = (const uint32_t *)BlobStart; 1784 F.LocalNumTypes = Record[0]; 1785 unsigned LocalBaseTypeIndex = Record[1]; 1786 F.BaseTypeIndex = getTotalNumTypes(); 1787 1788 if (F.LocalNumTypes > 0) { 1789 // Introduce the global -> local mapping for types within this module. 1790 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); 1791 1792 // Introduce the local -> global mapping for types within this module. 1793 F.TypeRemap.insert(std::make_pair(LocalBaseTypeIndex, 1794 F.BaseTypeIndex - LocalBaseTypeIndex)); 1795 1796 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); 1797 } 1798 break; 1799 } 1800 1801 case DECL_OFFSET: { 1802 if (F.LocalNumDecls != 0) { 1803 Error("duplicate DECL_OFFSET record in AST file"); 1804 return Failure; 1805 } 1806 F.DeclOffsets = (const uint32_t *)BlobStart; 1807 F.LocalNumDecls = Record[0]; 1808 unsigned LocalBaseDeclID = Record[1]; 1809 F.BaseDeclID = getTotalNumDecls(); 1810 1811 if (F.LocalNumDecls > 0) { 1812 // Introduce the global -> local mapping for declarations within this 1813 // module. 1814 GlobalDeclMap.insert( 1815 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F)); 1816 1817 // Introduce the local -> global mapping for declarations within this 1818 // module. 1819 F.DeclRemap.insert(std::make_pair(LocalBaseDeclID, 1820 F.BaseDeclID - LocalBaseDeclID)); 1821 1822 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); 1823 } 1824 break; 1825 } 1826 1827 case TU_UPDATE_LEXICAL: { 1828 DeclContext *TU = Context.getTranslationUnitDecl(); 1829 DeclContextInfo &Info = F.DeclContextInfos[TU]; 1830 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair *>(BlobStart); 1831 Info.NumLexicalDecls 1832 = static_cast<unsigned int>(BlobLen / sizeof(KindDeclIDPair)); 1833 TU->setHasExternalLexicalStorage(true); 1834 break; 1835 } 1836 1837 case UPDATE_VISIBLE: { 1838 unsigned Idx = 0; 1839 serialization::DeclID ID = ReadDeclID(F, Record, Idx); 1840 void *Table = ASTDeclContextNameLookupTable::Create( 1841 (const unsigned char *)BlobStart + Record[Idx++], 1842 (const unsigned char *)BlobStart, 1843 ASTDeclContextNameLookupTrait(*this, F)); 1844 if (ID == PREDEF_DECL_TRANSLATION_UNIT_ID) { // Is it the TU? 1845 DeclContext *TU = Context.getTranslationUnitDecl(); 1846 F.DeclContextInfos[TU].NameLookupTableData = Table; 1847 TU->setHasExternalVisibleStorage(true); 1848 } else 1849 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); 1850 break; 1851 } 1852 1853 case REDECLS_UPDATE_LATEST: { 1854 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 1855 for (unsigned i = 0, e = Record.size(); i < e; /* in loop */) { 1856 DeclID First = ReadDeclID(F, Record, i); 1857 DeclID Latest = ReadDeclID(F, Record, i); 1858 FirstLatestDeclIDs[First] = Latest; 1859 } 1860 break; 1861 } 1862 1863 case LANGUAGE_OPTIONS: 1864 if (ParseLanguageOptions(Record) && !DisableValidation) 1865 return IgnorePCH; 1866 break; 1867 1868 case IDENTIFIER_TABLE: 1869 F.IdentifierTableData = BlobStart; 1870 if (Record[0]) { 1871 F.IdentifierLookupTable 1872 = ASTIdentifierLookupTable::Create( 1873 (const unsigned char *)F.IdentifierTableData + Record[0], 1874 (const unsigned char *)F.IdentifierTableData, 1875 ASTIdentifierLookupTrait(*this, F)); 1876 1877 PP.getIdentifierTable().setExternalIdentifierLookup(this); 1878 } 1879 break; 1880 1881 case IDENTIFIER_OFFSET: { 1882 if (F.LocalNumIdentifiers != 0) { 1883 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 1884 return Failure; 1885 } 1886 F.IdentifierOffsets = (const uint32_t *)BlobStart; 1887 F.LocalNumIdentifiers = Record[0]; 1888 unsigned LocalBaseIdentifierID = Record[1]; 1889 F.BaseIdentifierID = getTotalNumIdentifiers(); 1890 1891 if (F.LocalNumIdentifiers > 0) { 1892 // Introduce the global -> local mapping for identifiers within this 1893 // module. 1894 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, 1895 &F)); 1896 1897 // Introduce the local -> global mapping for identifiers within this 1898 // module. 1899 F.IdentifierRemap.insert( 1900 std::make_pair(LocalBaseIdentifierID, 1901 F.BaseIdentifierID - LocalBaseIdentifierID)); 1902 1903 IdentifiersLoaded.resize(IdentifiersLoaded.size() 1904 + F.LocalNumIdentifiers); 1905 } 1906 break; 1907 } 1908 1909 case EXTERNAL_DEFINITIONS: 1910 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1911 ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); 1912 break; 1913 1914 case SPECIAL_TYPES: 1915 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1916 SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); 1917 break; 1918 1919 case STATISTICS: 1920 TotalNumStatements += Record[0]; 1921 TotalNumMacros += Record[1]; 1922 TotalLexicalDeclContexts += Record[2]; 1923 TotalVisibleDeclContexts += Record[3]; 1924 break; 1925 1926 case UNUSED_FILESCOPED_DECLS: 1927 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1928 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); 1929 break; 1930 1931 case DELEGATING_CTORS: 1932 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1933 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); 1934 break; 1935 1936 case WEAK_UNDECLARED_IDENTIFIERS: 1937 if (Record.size() % 4 != 0) { 1938 Error("invalid weak identifiers record"); 1939 return Failure; 1940 } 1941 1942 // FIXME: Ignore weak undeclared identifiers from non-original PCH 1943 // files. This isn't the way to do it :) 1944 WeakUndeclaredIdentifiers.clear(); 1945 1946 // Translate the weak, undeclared identifiers into global IDs. 1947 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { 1948 WeakUndeclaredIdentifiers.push_back( 1949 getGlobalIdentifierID(F, Record[I++])); 1950 WeakUndeclaredIdentifiers.push_back( 1951 getGlobalIdentifierID(F, Record[I++])); 1952 WeakUndeclaredIdentifiers.push_back( 1953 ReadSourceLocation(F, Record, I).getRawEncoding()); 1954 WeakUndeclaredIdentifiers.push_back(Record[I++]); 1955 } 1956 break; 1957 1958 case LOCALLY_SCOPED_EXTERNAL_DECLS: 1959 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1960 LocallyScopedExternalDecls.push_back(getGlobalDeclID(F, Record[I])); 1961 break; 1962 1963 case SELECTOR_OFFSETS: { 1964 F.SelectorOffsets = (const uint32_t *)BlobStart; 1965 F.LocalNumSelectors = Record[0]; 1966 unsigned LocalBaseSelectorID = Record[1]; 1967 F.BaseSelectorID = getTotalNumSelectors(); 1968 1969 if (F.LocalNumSelectors > 0) { 1970 // Introduce the global -> local mapping for selectors within this 1971 // module. 1972 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); 1973 1974 // Introduce the local -> global mapping for selectors within this 1975 // module. 1976 F.SelectorRemap.insert(std::make_pair(LocalBaseSelectorID, 1977 F.BaseSelectorID - LocalBaseSelectorID)); 1978 1979 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); 1980 } 1981 break; 1982 } 1983 1984 case METHOD_POOL: 1985 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 1986 if (Record[0]) 1987 F.SelectorLookupTable 1988 = ASTSelectorLookupTable::Create( 1989 F.SelectorLookupTableData + Record[0], 1990 F.SelectorLookupTableData, 1991 ASTSelectorLookupTrait(*this, F)); 1992 TotalNumMethodPoolEntries += Record[1]; 1993 break; 1994 1995 case REFERENCED_SELECTOR_POOL: 1996 if (!Record.empty()) { 1997 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { 1998 ReferencedSelectorsData.push_back(getGlobalSelectorID(F, 1999 Record[Idx++])); 2000 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). 2001 getRawEncoding()); 2002 } 2003 } 2004 break; 2005 2006 case PP_COUNTER_VALUE: 2007 if (!Record.empty() && Listener) 2008 Listener->ReadCounter(Record[0]); 2009 break; 2010 2011 case SOURCE_LOCATION_OFFSETS: { 2012 F.SLocEntryOffsets = (const uint32_t *)BlobStart; 2013 F.LocalNumSLocEntries = Record[0]; 2014 llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = 2015 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, Record[1]); 2016 // Make our entry in the range map. BaseID is negative and growing, so 2017 // we invert it. Because we invert it, though, we need the other end of 2018 // the range. 2019 unsigned RangeStart = 2020 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; 2021 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); 2022 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); 2023 2024 // Initialize the remapping table. 2025 // Invalid stays invalid. 2026 F.SLocRemap.insert(std::make_pair(0U, 0)); 2027 // This module. Base was 2 when being compiled. 2028 F.SLocRemap.insert(std::make_pair(2U, 2029 static_cast<int>(F.SLocEntryBaseOffset - 2))); 2030 2031 TotalNumSLocEntries += F.LocalNumSLocEntries; 2032 break; 2033 } 2034 2035 case MODULE_OFFSET_MAP: { 2036 // Additional remapping information. 2037 const unsigned char *Data = (const unsigned char*)BlobStart; 2038 const unsigned char *DataEnd = Data + BlobLen; 2039 2040 // Continuous range maps we may be updating in our module. 2041 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); 2042 ContinuousRangeMap<uint32_t, int, 2>::Builder 2043 IdentifierRemap(F.IdentifierRemap); 2044 ContinuousRangeMap<uint32_t, int, 2>::Builder 2045 PreprocessedEntityRemap(F.PreprocessedEntityRemap); 2046 ContinuousRangeMap<uint32_t, int, 2>::Builder 2047 SelectorRemap(F.SelectorRemap); 2048 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); 2049 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); 2050 2051 while(Data < DataEnd) { 2052 uint16_t Len = io::ReadUnalignedLE16(Data); 2053 StringRef Name = StringRef((const char*)Data, Len); 2054 Data += Len; 2055 Module *OM = ModuleMgr.lookup(Name); 2056 if (!OM) { 2057 Error("SourceLocation remap refers to unknown module"); 2058 return Failure; 2059 } 2060 2061 uint32_t SLocOffset = io::ReadUnalignedLE32(Data); 2062 uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); 2063 uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); 2064 uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); 2065 uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); 2066 uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); 2067 2068 // Source location offset is mapped to OM->SLocEntryBaseOffset. 2069 SLocRemap.insert(std::make_pair(SLocOffset, 2070 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); 2071 IdentifierRemap.insert( 2072 std::make_pair(IdentifierIDOffset, 2073 OM->BaseIdentifierID - IdentifierIDOffset)); 2074 PreprocessedEntityRemap.insert( 2075 std::make_pair(PreprocessedEntityIDOffset, 2076 OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset)); 2077 SelectorRemap.insert(std::make_pair(SelectorIDOffset, 2078 OM->BaseSelectorID - SelectorIDOffset)); 2079 DeclRemap.insert(std::make_pair(DeclIDOffset, 2080 OM->BaseDeclID - DeclIDOffset)); 2081 2082 TypeRemap.insert(std::make_pair(TypeIndexOffset, 2083 OM->BaseTypeIndex - TypeIndexOffset)); 2084 } 2085 break; 2086 } 2087 2088 case SOURCE_MANAGER_LINE_TABLE: 2089 if (ParseLineTable(F, Record)) 2090 return Failure; 2091 break; 2092 2093 case FILE_SOURCE_LOCATION_OFFSETS: 2094 F.SLocFileOffsets = (const uint32_t *)BlobStart; 2095 F.LocalNumSLocFileEntries = Record[0]; 2096 break; 2097 2098 case SOURCE_LOCATION_PRELOADS: { 2099 // Need to transform from the local view (1-based IDs) to the global view, 2100 // which is based off F.SLocEntryBaseID. 2101 if (!F.PreloadSLocEntries.empty()) { 2102 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file"); 2103 return Failure; 2104 } 2105 2106 F.PreloadSLocEntries.swap(Record); 2107 break; 2108 } 2109 2110 case STAT_CACHE: { 2111 if (!DisableStatCache) { 2112 ASTStatCache *MyStatCache = 2113 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2114 (const unsigned char *)BlobStart, 2115 NumStatHits, NumStatMisses); 2116 FileMgr.addStatCache(MyStatCache); 2117 F.StatCache = MyStatCache; 2118 } 2119 break; 2120 } 2121 2122 case EXT_VECTOR_DECLS: 2123 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2124 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); 2125 break; 2126 2127 case VTABLE_USES: 2128 if (Record.size() % 3 != 0) { 2129 Error("Invalid VTABLE_USES record"); 2130 return Failure; 2131 } 2132 2133 // Later tables overwrite earlier ones. 2134 // FIXME: Modules will have some trouble with this. This is clearly not 2135 // the right way to do this. 2136 VTableUses.clear(); 2137 2138 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { 2139 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); 2140 VTableUses.push_back( 2141 ReadSourceLocation(F, Record, Idx).getRawEncoding()); 2142 VTableUses.push_back(Record[Idx++]); 2143 } 2144 break; 2145 2146 case DYNAMIC_CLASSES: 2147 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2148 DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); 2149 break; 2150 2151 case PENDING_IMPLICIT_INSTANTIATIONS: 2152 if (PendingInstantiations.size() % 2 != 0) { 2153 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); 2154 return Failure; 2155 } 2156 2157 // Later lists of pending instantiations overwrite earlier ones. 2158 // FIXME: This is most certainly wrong for modules. 2159 PendingInstantiations.clear(); 2160 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { 2161 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); 2162 PendingInstantiations.push_back( 2163 ReadSourceLocation(F, Record, I).getRawEncoding()); 2164 } 2165 break; 2166 2167 case SEMA_DECL_REFS: 2168 // Later tables overwrite earlier ones. 2169 // FIXME: Modules will have some trouble with this. 2170 SemaDeclRefs.clear(); 2171 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2172 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2173 break; 2174 2175 case ORIGINAL_FILE_NAME: 2176 // The primary AST will be the last to get here, so it will be the one 2177 // that's used. 2178 ActualOriginalFileName.assign(BlobStart, BlobLen); 2179 OriginalFileName = ActualOriginalFileName; 2180 MaybeAddSystemRootToFilename(OriginalFileName); 2181 break; 2182 2183 case ORIGINAL_FILE_ID: 2184 OriginalFileID = FileID::get(Record[0]); 2185 break; 2186 2187 case ORIGINAL_PCH_DIR: 2188 // The primary AST will be the last to get here, so it will be the one 2189 // that's used. 2190 OriginalDir.assign(BlobStart, BlobLen); 2191 break; 2192 2193 case VERSION_CONTROL_BRANCH_REVISION: { 2194 const std::string &CurBranch = getClangFullRepositoryVersion(); 2195 StringRef ASTBranch(BlobStart, BlobLen); 2196 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2197 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2198 return IgnorePCH; 2199 } 2200 break; 2201 } 2202 2203 case PPD_ENTITIES_OFFSETS: { 2204 F.PreprocessedEntityOffsets = (const uint32_t *)BlobStart; 2205 assert(BlobLen % sizeof(uint32_t) == 0); 2206 F.NumPreprocessedEntities = BlobLen / sizeof(uint32_t); 2207 2208 unsigned LocalBasePreprocessedEntityID = Record[0]; 2209 2210 unsigned StartingID; 2211 if (!PP.getPreprocessingRecord()) 2212 PP.createPreprocessingRecord(true); 2213 if (!PP.getPreprocessingRecord()->getExternalSource()) 2214 PP.getPreprocessingRecord()->SetExternalSource(*this); 2215 StartingID 2216 = PP.getPreprocessingRecord() 2217 ->allocateLoadedEntities(F.NumPreprocessedEntities); 2218 F.BasePreprocessedEntityID = StartingID; 2219 2220 if (F.NumPreprocessedEntities > 0) { 2221 // Introduce the global -> local mapping for preprocessed entities in 2222 // this module. 2223 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); 2224 2225 // Introduce the local -> global mapping for preprocessed entities in 2226 // this module. 2227 F.PreprocessedEntityRemap.insert( 2228 std::make_pair(LocalBasePreprocessedEntityID, 2229 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID)); 2230 } 2231 2232 break; 2233 } 2234 2235 case DECL_UPDATE_OFFSETS: { 2236 if (Record.size() % 2 != 0) { 2237 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2238 return Failure; 2239 } 2240 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2241 DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] 2242 .push_back(std::make_pair(&F, Record[I+1])); 2243 break; 2244 } 2245 2246 case DECL_REPLACEMENTS: { 2247 if (Record.size() % 2 != 0) { 2248 Error("invalid DECL_REPLACEMENTS block in AST file"); 2249 return Failure; 2250 } 2251 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2252 ReplacedDecls[getGlobalDeclID(F, Record[I])] 2253 = std::make_pair(&F, Record[I+1]); 2254 break; 2255 } 2256 2257 case OBJC_CHAINED_CATEGORIES: { 2258 if (Record.size() % 3 != 0) { 2259 Error("invalid OBJC_CHAINED_CATEGORIES block in AST file"); 2260 return Failure; 2261 } 2262 for (unsigned I = 0, N = Record.size(); I != N; I += 3) { 2263 serialization::GlobalDeclID GlobID = getGlobalDeclID(F, Record[I]); 2264 F.ChainedObjCCategories[GlobID] = std::make_pair(Record[I+1], 2265 Record[I+2]); 2266 ObjCChainedCategoriesInterfaces.insert(GlobID); 2267 } 2268 break; 2269 } 2270 2271 case CXX_BASE_SPECIFIER_OFFSETS: { 2272 if (F.LocalNumCXXBaseSpecifiers != 0) { 2273 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2274 return Failure; 2275 } 2276 2277 F.LocalNumCXXBaseSpecifiers = Record[0]; 2278 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2279 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; 2280 break; 2281 } 2282 2283 case DIAG_PRAGMA_MAPPINGS: 2284 if (Record.size() % 2 != 0) { 2285 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2286 return Failure; 2287 } 2288 2289 if (F.PragmaDiagMappings.empty()) 2290 F.PragmaDiagMappings.swap(Record); 2291 else 2292 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), 2293 Record.begin(), Record.end()); 2294 break; 2295 2296 case CUDA_SPECIAL_DECL_REFS: 2297 // Later tables overwrite earlier ones. 2298 // FIXME: Modules will have trouble with this. 2299 CUDASpecialDeclRefs.clear(); 2300 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2301 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2302 break; 2303 2304 case HEADER_SEARCH_TABLE: { 2305 F.HeaderFileInfoTableData = BlobStart; 2306 F.LocalNumHeaderFileInfos = Record[1]; 2307 F.HeaderFileFrameworkStrings = BlobStart + Record[2]; 2308 if (Record[0]) { 2309 F.HeaderFileInfoTable 2310 = HeaderFileInfoLookupTable::Create( 2311 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2312 (const unsigned char *)F.HeaderFileInfoTableData, 2313 HeaderFileInfoTrait(*this, F, 2314 &PP.getHeaderSearchInfo(), 2315 BlobStart + Record[2])); 2316 2317 PP.getHeaderSearchInfo().SetExternalSource(this); 2318 if (!PP.getHeaderSearchInfo().getExternalLookup()) 2319 PP.getHeaderSearchInfo().SetExternalLookup(this); 2320 } 2321 break; 2322 } 2323 2324 case FP_PRAGMA_OPTIONS: 2325 // Later tables overwrite earlier ones. 2326 FPPragmaOptions.swap(Record); 2327 break; 2328 2329 case OPENCL_EXTENSIONS: 2330 // Later tables overwrite earlier ones. 2331 OpenCLExtensions.swap(Record); 2332 break; 2333 2334 case TENTATIVE_DEFINITIONS: 2335 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2336 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2337 break; 2338 2339 case KNOWN_NAMESPACES: 2340 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2341 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); 2342 break; 2343 } 2344 } 2345 Error("premature end of bitstream in AST file"); 2346 return Failure; 2347} 2348 2349ASTReader::ASTReadResult ASTReader::validateFileEntries(Module &M) { 2350 llvm::BitstreamCursor &SLocEntryCursor = M.SLocEntryCursor; 2351 2352 for (unsigned i = 0, e = M.LocalNumSLocFileEntries; i != e; ++i) { 2353 SLocEntryCursor.JumpToBit(M.SLocFileOffsets[i]); 2354 unsigned Code = SLocEntryCursor.ReadCode(); 2355 if (Code == llvm::bitc::END_BLOCK || 2356 Code == llvm::bitc::ENTER_SUBBLOCK || 2357 Code == llvm::bitc::DEFINE_ABBREV) { 2358 Error("incorrectly-formatted source location entry in AST file"); 2359 return Failure; 2360 } 2361 2362 RecordData Record; 2363 const char *BlobStart; 2364 unsigned BlobLen; 2365 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 2366 default: 2367 Error("incorrectly-formatted source location entry in AST file"); 2368 return Failure; 2369 2370 case SM_SLOC_FILE_ENTRY: { 2371 StringRef Filename(BlobStart, BlobLen); 2372 const FileEntry *File = getFileEntry(Filename); 2373 2374 if (File == 0) { 2375 std::string ErrorStr = "could not find file '"; 2376 ErrorStr += Filename; 2377 ErrorStr += "' referenced by AST file"; 2378 Error(ErrorStr.c_str()); 2379 return IgnorePCH; 2380 } 2381 2382 if (Record.size() < 6) { 2383 Error("source location entry is incorrect"); 2384 return Failure; 2385 } 2386 2387 // The stat info from the FileEntry came from the cached stat 2388 // info of the PCH, so we cannot trust it. 2389 struct stat StatBuf; 2390 if (::stat(File->getName(), &StatBuf) != 0) { 2391 StatBuf.st_size = File->getSize(); 2392 StatBuf.st_mtime = File->getModificationTime(); 2393 } 2394 2395 if (((off_t)Record[4] != StatBuf.st_size 2396#if !defined(LLVM_ON_WIN32) 2397 // In our regression testing, the Windows file system seems to 2398 // have inconsistent modification times that sometimes 2399 // erroneously trigger this error-handling path. 2400 || (time_t)Record[5] != StatBuf.st_mtime 2401#endif 2402 )) { 2403 Error(diag::err_fe_pch_file_modified, Filename); 2404 return IgnorePCH; 2405 } 2406 2407 break; 2408 } 2409 } 2410 } 2411 2412 return Success; 2413} 2414 2415namespace { 2416 /// \brief Visitor class used to look up identifirs in an AST file. 2417 class IdentifierLookupVisitor { 2418 StringRef Name; 2419 IdentifierInfo *Found; 2420 public: 2421 explicit IdentifierLookupVisitor(StringRef Name) : Name(Name), Found() { } 2422 2423 static bool visit(Module &M, void *UserData) { 2424 IdentifierLookupVisitor *This 2425 = static_cast<IdentifierLookupVisitor *>(UserData); 2426 2427 ASTIdentifierLookupTable *IdTable 2428 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable; 2429 if (!IdTable) 2430 return false; 2431 2432 std::pair<const char*, unsigned> Key(This->Name.begin(), 2433 This->Name.size()); 2434 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 2435 if (Pos == IdTable->end()) 2436 return false; 2437 2438 // Dereferencing the iterator has the effect of building the 2439 // IdentifierInfo node and populating it with the various 2440 // declarations it needs. 2441 This->Found = *Pos; 2442 return true; 2443 } 2444 2445 // \brief Retrieve the identifier info found within the module 2446 // files. 2447 IdentifierInfo *getIdentifierInfo() const { return Found; } 2448 }; 2449} 2450 2451 2452ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2453 ModuleKind Type) { 2454 switch(ReadASTCore(FileName, Type, /*ImportedBy=*/0)) { 2455 case Failure: return Failure; 2456 case IgnorePCH: return IgnorePCH; 2457 case Success: break; 2458 } 2459 2460 // Here comes stuff that we only do once the entire chain is loaded. 2461 2462 // Check the predefines buffers. 2463 if (!DisableValidation && Type != MK_Module && Type != MK_Preamble && 2464 // FIXME: CheckPredefinesBuffers also sets the SuggestedPredefines; 2465 // if DisableValidation is true, defines that were set on command-line 2466 // but not in the PCH file will not be added to SuggestedPredefines. 2467 CheckPredefinesBuffers()) 2468 return IgnorePCH; 2469 2470 // Initialization of keywords and pragmas occurs before the 2471 // AST file is read, so there may be some identifiers that were 2472 // loaded into the IdentifierTable before we intercepted the 2473 // creation of identifiers. Iterate through the list of known 2474 // identifiers and determine whether we have to establish 2475 // preprocessor definitions or top-level identifier declaration 2476 // chains for those identifiers. 2477 // 2478 // We copy the IdentifierInfo pointers to a small vector first, 2479 // since de-serializing declarations or macro definitions can add 2480 // new entries into the identifier table, invalidating the 2481 // iterators. 2482 // 2483 // FIXME: We need a lazier way to load this information, e.g., by marking 2484 // the identifier data as 'dirty', so that it will be looked up in the 2485 // AST file(s) if it is uttered in the source. This could save us some 2486 // module load time. 2487 SmallVector<IdentifierInfo *, 128> Identifiers; 2488 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(), 2489 IdEnd = PP.getIdentifierTable().end(); 2490 Id != IdEnd; ++Id) 2491 Identifiers.push_back(Id->second); 2492 2493 for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { 2494 IdentifierLookupVisitor Visitor(Identifiers[I]->getName()); 2495 ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor); 2496 } 2497 2498 InitializeContext(); 2499 2500 if (DeserializationListener) 2501 DeserializationListener->ReaderInitialized(this); 2502 2503 // If this AST file is a precompiled preamble, then set the main file ID of 2504 // the source manager to the file source file from which the preamble was 2505 // built. This is the only valid way to use a precompiled preamble. 2506 if (Type == MK_Preamble) { 2507 if (OriginalFileID.isInvalid()) { 2508 SourceLocation Loc 2509 = SourceMgr.getLocation(FileMgr.getFile(getOriginalSourceFile()), 1, 1); 2510 if (Loc.isValid()) 2511 OriginalFileID = SourceMgr.getDecomposedLoc(Loc).first; 2512 } 2513 else { 2514 OriginalFileID = FileID::get(ModuleMgr.getPrimaryModule().SLocEntryBaseID 2515 + OriginalFileID.getOpaqueValue() - 1); 2516 } 2517 2518 if (!OriginalFileID.isInvalid()) 2519 SourceMgr.SetPreambleFileID(OriginalFileID); 2520 } 2521 2522 return Success; 2523} 2524 2525ASTReader::ASTReadResult ASTReader::ReadASTCore(StringRef FileName, 2526 ModuleKind Type, 2527 Module *ImportedBy) { 2528 Module *M; 2529 bool NewModule; 2530 std::string ErrorStr; 2531 llvm::tie(M, NewModule) = ModuleMgr.addModule(FileName, Type, ImportedBy, 2532 ErrorStr); 2533 2534 if (!M) { 2535 // We couldn't load the module. 2536 std::string Msg = "Unable to load module \"" + FileName.str() + "\": " 2537 + ErrorStr; 2538 Error(Msg); 2539 return Failure; 2540 } 2541 2542 if (!NewModule) { 2543 // We've already loaded this module. 2544 return Success; 2545 } 2546 2547 // FIXME: This seems rather a hack. Should CurrentDir be part of the 2548 // module? 2549 if (FileName != "-") { 2550 CurrentDir = llvm::sys::path::parent_path(FileName); 2551 if (CurrentDir.empty()) CurrentDir = "."; 2552 } 2553 2554 Module &F = *M; 2555 llvm::BitstreamCursor &Stream = F.Stream; 2556 Stream.init(F.StreamFile); 2557 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2558 2559 // Sniff for the signature. 2560 if (Stream.Read(8) != 'C' || 2561 Stream.Read(8) != 'P' || 2562 Stream.Read(8) != 'C' || 2563 Stream.Read(8) != 'H') { 2564 Diag(diag::err_not_a_pch_file) << FileName; 2565 return Failure; 2566 } 2567 2568 while (!Stream.AtEndOfStream()) { 2569 unsigned Code = Stream.ReadCode(); 2570 2571 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2572 Error("invalid record at top-level of AST file"); 2573 return Failure; 2574 } 2575 2576 unsigned BlockID = Stream.ReadSubBlockID(); 2577 2578 // We only know the AST subblock ID. 2579 switch (BlockID) { 2580 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2581 if (Stream.ReadBlockInfoBlock()) { 2582 Error("malformed BlockInfoBlock in AST file"); 2583 return Failure; 2584 } 2585 break; 2586 case AST_BLOCK_ID: 2587 switch (ReadASTBlock(F)) { 2588 case Success: 2589 break; 2590 2591 case Failure: 2592 return Failure; 2593 2594 case IgnorePCH: 2595 // FIXME: We could consider reading through to the end of this 2596 // AST block, skipping subblocks, to see if there are other 2597 // AST blocks elsewhere. 2598 2599 // FIXME: We can't clear loaded slocentries anymore. 2600 //SourceMgr.ClearPreallocatedSLocEntries(); 2601 2602 // Remove the stat cache. 2603 if (F.StatCache) 2604 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2605 2606 return IgnorePCH; 2607 } 2608 break; 2609 default: 2610 if (Stream.SkipBlock()) { 2611 Error("malformed block record in AST file"); 2612 return Failure; 2613 } 2614 break; 2615 } 2616 } 2617 2618 // Once read, set the Module bit base offset and update the size in 2619 // bits of all files we've seen. 2620 F.GlobalBitOffset = TotalModulesSizeInBits; 2621 TotalModulesSizeInBits += F.SizeInBits; 2622 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); 2623 2624 // Make sure that the files this module was built against are still available. 2625 if (!DisableValidation) { 2626 switch(validateFileEntries(*M)) { 2627 case Failure: return Failure; 2628 case IgnorePCH: return IgnorePCH; 2629 case Success: break; 2630 } 2631 } 2632 2633 // Preload SLocEntries. 2634 for (unsigned I = 0, N = M->PreloadSLocEntries.size(); I != N; ++I) { 2635 int Index = int(M->PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID; 2636 ASTReadResult Result = ReadSLocEntryRecord(Index); 2637 if (Result != Success) 2638 return Failure; 2639 } 2640 2641 2642 return Success; 2643} 2644 2645void ASTReader::InitializeContext() { 2646 // If there's a listener, notify them that we "read" the translation unit. 2647 if (DeserializationListener) 2648 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID, 2649 Context.getTranslationUnitDecl()); 2650 2651 // Make sure we load the declaration update records for the translation unit, 2652 // if there are any. 2653 loadDeclUpdateRecords(PREDEF_DECL_TRANSLATION_UNIT_ID, 2654 Context.getTranslationUnitDecl()); 2655 2656 // FIXME: Find a better way to deal with collisions between these 2657 // built-in types. Right now, we just ignore the problem. 2658 2659 // Load the special types. 2660 if (SpecialTypes.size() > NumSpecialTypeIDs) { 2661 if (Context.getBuiltinVaListType().isNull()) { 2662 Context.setBuiltinVaListType( 2663 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2664 } 2665 2666 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) { 2667 if (Context.ObjCProtoType.isNull()) 2668 Context.ObjCProtoType = GetType(Proto); 2669 } 2670 2671 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) { 2672 if (!Context.CFConstantStringTypeDecl) 2673 Context.setCFConstantStringType(GetType(String)); 2674 } 2675 2676 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2677 QualType FileType = GetType(File); 2678 if (FileType.isNull()) { 2679 Error("FILE type is NULL"); 2680 return; 2681 } 2682 2683 if (!Context.FILEDecl) { 2684 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2685 Context.setFILEDecl(Typedef->getDecl()); 2686 else { 2687 const TagType *Tag = FileType->getAs<TagType>(); 2688 if (!Tag) { 2689 Error("Invalid FILE type in AST file"); 2690 return; 2691 } 2692 Context.setFILEDecl(Tag->getDecl()); 2693 } 2694 } 2695 } 2696 2697 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 2698 QualType Jmp_bufType = GetType(Jmp_buf); 2699 if (Jmp_bufType.isNull()) { 2700 Error("jmp_buf type is NULL"); 2701 return; 2702 } 2703 2704 if (!Context.jmp_bufDecl) { 2705 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 2706 Context.setjmp_bufDecl(Typedef->getDecl()); 2707 else { 2708 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 2709 if (!Tag) { 2710 Error("Invalid jmp_buf type in AST file"); 2711 return; 2712 } 2713 Context.setjmp_bufDecl(Tag->getDecl()); 2714 } 2715 } 2716 } 2717 2718 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 2719 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 2720 if (Sigjmp_bufType.isNull()) { 2721 Error("sigjmp_buf type is NULL"); 2722 return; 2723 } 2724 2725 if (!Context.sigjmp_bufDecl) { 2726 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 2727 Context.setsigjmp_bufDecl(Typedef->getDecl()); 2728 else { 2729 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 2730 assert(Tag && "Invalid sigjmp_buf type in AST file"); 2731 Context.setsigjmp_bufDecl(Tag->getDecl()); 2732 } 2733 } 2734 } 2735 2736 if (unsigned ObjCIdRedef 2737 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) { 2738 if (Context.ObjCIdRedefinitionType.isNull()) 2739 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef); 2740 } 2741 2742 if (unsigned ObjCClassRedef 2743 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) { 2744 if (Context.ObjCClassRedefinitionType.isNull()) 2745 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef); 2746 } 2747 2748 if (unsigned ObjCSelRedef 2749 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) { 2750 if (Context.ObjCSelRedefinitionType.isNull()) 2751 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef); 2752 } 2753 } 2754 2755 ReadPragmaDiagnosticMappings(Context.getDiagnostics()); 2756 2757 // If there were any CUDA special declarations, deserialize them. 2758 if (!CUDASpecialDeclRefs.empty()) { 2759 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 2760 Context.setcudaConfigureCallDecl( 2761 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 2762 } 2763} 2764 2765/// \brief Retrieve the name of the original source file name 2766/// directly from the AST file, without actually loading the AST 2767/// file. 2768std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 2769 FileManager &FileMgr, 2770 Diagnostic &Diags) { 2771 // Open the AST file. 2772 std::string ErrStr; 2773 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 2774 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 2775 if (!Buffer) { 2776 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 2777 return std::string(); 2778 } 2779 2780 // Initialize the stream 2781 llvm::BitstreamReader StreamFile; 2782 llvm::BitstreamCursor Stream; 2783 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 2784 (const unsigned char *)Buffer->getBufferEnd()); 2785 Stream.init(StreamFile); 2786 2787 // Sniff for the signature. 2788 if (Stream.Read(8) != 'C' || 2789 Stream.Read(8) != 'P' || 2790 Stream.Read(8) != 'C' || 2791 Stream.Read(8) != 'H') { 2792 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 2793 return std::string(); 2794 } 2795 2796 RecordData Record; 2797 while (!Stream.AtEndOfStream()) { 2798 unsigned Code = Stream.ReadCode(); 2799 2800 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 2801 unsigned BlockID = Stream.ReadSubBlockID(); 2802 2803 // We only know the AST subblock ID. 2804 switch (BlockID) { 2805 case AST_BLOCK_ID: 2806 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 2807 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2808 return std::string(); 2809 } 2810 break; 2811 2812 default: 2813 if (Stream.SkipBlock()) { 2814 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2815 return std::string(); 2816 } 2817 break; 2818 } 2819 continue; 2820 } 2821 2822 if (Code == llvm::bitc::END_BLOCK) { 2823 if (Stream.ReadBlockEnd()) { 2824 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 2825 return std::string(); 2826 } 2827 continue; 2828 } 2829 2830 if (Code == llvm::bitc::DEFINE_ABBREV) { 2831 Stream.ReadAbbrevRecord(); 2832 continue; 2833 } 2834 2835 Record.clear(); 2836 const char *BlobStart = 0; 2837 unsigned BlobLen = 0; 2838 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 2839 == ORIGINAL_FILE_NAME) 2840 return std::string(BlobStart, BlobLen); 2841 } 2842 2843 return std::string(); 2844} 2845 2846/// \brief Parse the record that corresponds to a LangOptions data 2847/// structure. 2848/// 2849/// This routine parses the language options from the AST file and then gives 2850/// them to the AST listener if one is set. 2851/// 2852/// \returns true if the listener deems the file unacceptable, false otherwise. 2853bool ASTReader::ParseLanguageOptions( 2854 const SmallVectorImpl<uint64_t> &Record) { 2855 if (Listener) { 2856 LangOptions LangOpts; 2857 unsigned Idx = 0; 2858#define LANGOPT(Name, Bits, Default, Description) \ 2859 LangOpts.Name = Record[Idx++]; 2860#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ 2861 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++])); 2862#include "clang/Basic/LangOptions.def" 2863 2864 return Listener->ReadLanguageOptions(LangOpts); 2865 } 2866 2867 return false; 2868} 2869 2870PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) { 2871 GlobalPreprocessedEntityMapType::iterator 2872 I = GlobalPreprocessedEntityMap.find(Index); 2873 assert(I != GlobalPreprocessedEntityMap.end() && 2874 "Corrupted global preprocessed entity map"); 2875 Module &M = *I->second; 2876 unsigned LocalIndex = Index - M.BasePreprocessedEntityID; 2877 2878 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); 2879 M.PreprocessorDetailCursor.JumpToBit(M.PreprocessedEntityOffsets[LocalIndex]); 2880 return LoadPreprocessedEntity(M); 2881} 2882 2883PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 2884 RecordLocation Loc = getLocalBitOffset(Offset); 2885 2886 // Keep track of where we are in the stream, then jump back there 2887 // after reading this entity. 2888 SavedStreamPosition SavedPosition(Loc.F->PreprocessorDetailCursor); 2889 Loc.F->PreprocessorDetailCursor.JumpToBit(Loc.Offset); 2890 return LoadPreprocessedEntity(*Loc.F); 2891} 2892 2893namespace { 2894 /// \brief Visitor used to search for information about a header file. 2895 class HeaderFileInfoVisitor { 2896 ASTReader &Reader; 2897 const FileEntry *FE; 2898 2899 llvm::Optional<HeaderFileInfo> HFI; 2900 2901 public: 2902 HeaderFileInfoVisitor(ASTReader &Reader, const FileEntry *FE) 2903 : Reader(Reader), FE(FE) { } 2904 2905 static bool visit(Module &M, void *UserData) { 2906 HeaderFileInfoVisitor *This 2907 = static_cast<HeaderFileInfoVisitor *>(UserData); 2908 2909 HeaderFileInfoTrait Trait(This->Reader, M, 2910 &This->Reader.getPreprocessor().getHeaderSearchInfo(), 2911 M.HeaderFileFrameworkStrings, 2912 This->FE->getName()); 2913 2914 HeaderFileInfoLookupTable *Table 2915 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable); 2916 if (!Table) 2917 return false; 2918 2919 // Look in the on-disk hash table for an entry for this file name. 2920 HeaderFileInfoLookupTable::iterator Pos = Table->find(This->FE->getName(), 2921 &Trait); 2922 if (Pos == Table->end()) 2923 return false; 2924 2925 This->HFI = *Pos; 2926 return true; 2927 } 2928 2929 llvm::Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; } 2930 }; 2931} 2932 2933HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 2934 HeaderFileInfoVisitor Visitor(*this, FE); 2935 ModuleMgr.visit(&HeaderFileInfoVisitor::visit, &Visitor); 2936 if (llvm::Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo()) { 2937 if (Listener) 2938 Listener->ReadHeaderFileInfo(*HFI, FE->getUID()); 2939 return *HFI; 2940 } 2941 2942 return HeaderFileInfo(); 2943} 2944 2945void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 2946 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 2947 Module &F = *(*I); 2948 unsigned Idx = 0; 2949 while (Idx < F.PragmaDiagMappings.size()) { 2950 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); 2951 while (1) { 2952 assert(Idx < F.PragmaDiagMappings.size() && 2953 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 2954 if (Idx >= F.PragmaDiagMappings.size()) { 2955 break; // Something is messed up but at least avoid infinite loop in 2956 // release build. 2957 } 2958 unsigned DiagID = F.PragmaDiagMappings[Idx++]; 2959 if (DiagID == (unsigned)-1) { 2960 break; // no more diag/map pairs for this location. 2961 } 2962 diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; 2963 Diag.setDiagnosticMapping(DiagID, Map, Loc); 2964 } 2965 } 2966 } 2967} 2968 2969/// \brief Get the correct cursor and offset for loading a type. 2970ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 2971 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); 2972 assert(I != GlobalTypeMap.end() && "Corrupted global type map"); 2973 Module *M = I->second; 2974 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); 2975} 2976 2977/// \brief Read and return the type with the given index.. 2978/// 2979/// The index is the type ID, shifted and minus the number of predefs. This 2980/// routine actually reads the record corresponding to the type at the given 2981/// location. It is a helper routine for GetType, which deals with reading type 2982/// IDs. 2983QualType ASTReader::readTypeRecord(unsigned Index) { 2984 RecordLocation Loc = TypeCursorForIndex(Index); 2985 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 2986 2987 // Keep track of where we are in the stream, then jump back there 2988 // after reading this type. 2989 SavedStreamPosition SavedPosition(DeclsCursor); 2990 2991 ReadingKindTracker ReadingKind(Read_Type, *this); 2992 2993 // Note that we are loading a type record. 2994 Deserializing AType(this); 2995 2996 unsigned Idx = 0; 2997 DeclsCursor.JumpToBit(Loc.Offset); 2998 RecordData Record; 2999 unsigned Code = DeclsCursor.ReadCode(); 3000 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 3001 case TYPE_EXT_QUAL: { 3002 if (Record.size() != 2) { 3003 Error("Incorrect encoding of extended qualifier type"); 3004 return QualType(); 3005 } 3006 QualType Base = readType(*Loc.F, Record, Idx); 3007 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); 3008 return Context.getQualifiedType(Base, Quals); 3009 } 3010 3011 case TYPE_COMPLEX: { 3012 if (Record.size() != 1) { 3013 Error("Incorrect encoding of complex type"); 3014 return QualType(); 3015 } 3016 QualType ElemType = readType(*Loc.F, Record, Idx); 3017 return Context.getComplexType(ElemType); 3018 } 3019 3020 case TYPE_POINTER: { 3021 if (Record.size() != 1) { 3022 Error("Incorrect encoding of pointer type"); 3023 return QualType(); 3024 } 3025 QualType PointeeType = readType(*Loc.F, Record, Idx); 3026 return Context.getPointerType(PointeeType); 3027 } 3028 3029 case TYPE_BLOCK_POINTER: { 3030 if (Record.size() != 1) { 3031 Error("Incorrect encoding of block pointer type"); 3032 return QualType(); 3033 } 3034 QualType PointeeType = readType(*Loc.F, Record, Idx); 3035 return Context.getBlockPointerType(PointeeType); 3036 } 3037 3038 case TYPE_LVALUE_REFERENCE: { 3039 if (Record.size() != 2) { 3040 Error("Incorrect encoding of lvalue reference type"); 3041 return QualType(); 3042 } 3043 QualType PointeeType = readType(*Loc.F, Record, Idx); 3044 return Context.getLValueReferenceType(PointeeType, Record[1]); 3045 } 3046 3047 case TYPE_RVALUE_REFERENCE: { 3048 if (Record.size() != 1) { 3049 Error("Incorrect encoding of rvalue reference type"); 3050 return QualType(); 3051 } 3052 QualType PointeeType = readType(*Loc.F, Record, Idx); 3053 return Context.getRValueReferenceType(PointeeType); 3054 } 3055 3056 case TYPE_MEMBER_POINTER: { 3057 if (Record.size() != 2) { 3058 Error("Incorrect encoding of member pointer type"); 3059 return QualType(); 3060 } 3061 QualType PointeeType = readType(*Loc.F, Record, Idx); 3062 QualType ClassType = readType(*Loc.F, Record, Idx); 3063 if (PointeeType.isNull() || ClassType.isNull()) 3064 return QualType(); 3065 3066 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3067 } 3068 3069 case TYPE_CONSTANT_ARRAY: { 3070 QualType ElementType = readType(*Loc.F, Record, Idx); 3071 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3072 unsigned IndexTypeQuals = Record[2]; 3073 unsigned Idx = 3; 3074 llvm::APInt Size = ReadAPInt(Record, Idx); 3075 return Context.getConstantArrayType(ElementType, Size, 3076 ASM, IndexTypeQuals); 3077 } 3078 3079 case TYPE_INCOMPLETE_ARRAY: { 3080 QualType ElementType = readType(*Loc.F, Record, Idx); 3081 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3082 unsigned IndexTypeQuals = Record[2]; 3083 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3084 } 3085 3086 case TYPE_VARIABLE_ARRAY: { 3087 QualType ElementType = readType(*Loc.F, Record, Idx); 3088 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3089 unsigned IndexTypeQuals = Record[2]; 3090 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3091 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3092 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3093 ASM, IndexTypeQuals, 3094 SourceRange(LBLoc, RBLoc)); 3095 } 3096 3097 case TYPE_VECTOR: { 3098 if (Record.size() != 3) { 3099 Error("incorrect encoding of vector type in AST file"); 3100 return QualType(); 3101 } 3102 3103 QualType ElementType = readType(*Loc.F, Record, Idx); 3104 unsigned NumElements = Record[1]; 3105 unsigned VecKind = Record[2]; 3106 return Context.getVectorType(ElementType, NumElements, 3107 (VectorType::VectorKind)VecKind); 3108 } 3109 3110 case TYPE_EXT_VECTOR: { 3111 if (Record.size() != 3) { 3112 Error("incorrect encoding of extended vector type in AST file"); 3113 return QualType(); 3114 } 3115 3116 QualType ElementType = readType(*Loc.F, Record, Idx); 3117 unsigned NumElements = Record[1]; 3118 return Context.getExtVectorType(ElementType, NumElements); 3119 } 3120 3121 case TYPE_FUNCTION_NO_PROTO: { 3122 if (Record.size() != 6) { 3123 Error("incorrect encoding of no-proto function type"); 3124 return QualType(); 3125 } 3126 QualType ResultType = readType(*Loc.F, Record, Idx); 3127 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], 3128 (CallingConv)Record[4], Record[5]); 3129 return Context.getFunctionNoProtoType(ResultType, Info); 3130 } 3131 3132 case TYPE_FUNCTION_PROTO: { 3133 QualType ResultType = readType(*Loc.F, Record, Idx); 3134 3135 FunctionProtoType::ExtProtoInfo EPI; 3136 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3137 /*hasregparm*/ Record[2], 3138 /*regparm*/ Record[3], 3139 static_cast<CallingConv>(Record[4]), 3140 /*produces*/ Record[5]); 3141 3142 unsigned Idx = 6; 3143 unsigned NumParams = Record[Idx++]; 3144 SmallVector<QualType, 16> ParamTypes; 3145 for (unsigned I = 0; I != NumParams; ++I) 3146 ParamTypes.push_back(readType(*Loc.F, Record, Idx)); 3147 3148 EPI.Variadic = Record[Idx++]; 3149 EPI.TypeQuals = Record[Idx++]; 3150 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3151 ExceptionSpecificationType EST = 3152 static_cast<ExceptionSpecificationType>(Record[Idx++]); 3153 EPI.ExceptionSpecType = EST; 3154 if (EST == EST_Dynamic) { 3155 EPI.NumExceptions = Record[Idx++]; 3156 SmallVector<QualType, 2> Exceptions; 3157 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3158 Exceptions.push_back(readType(*Loc.F, Record, Idx)); 3159 EPI.Exceptions = Exceptions.data(); 3160 } else if (EST == EST_ComputedNoexcept) { 3161 EPI.NoexceptExpr = ReadExpr(*Loc.F); 3162 } 3163 return Context.getFunctionType(ResultType, ParamTypes.data(), NumParams, 3164 EPI); 3165 } 3166 3167 case TYPE_UNRESOLVED_USING: { 3168 unsigned Idx = 0; 3169 return Context.getTypeDeclType( 3170 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); 3171 } 3172 3173 case TYPE_TYPEDEF: { 3174 if (Record.size() != 2) { 3175 Error("incorrect encoding of typedef type"); 3176 return QualType(); 3177 } 3178 unsigned Idx = 0; 3179 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); 3180 QualType Canonical = readType(*Loc.F, Record, Idx); 3181 if (!Canonical.isNull()) 3182 Canonical = Context.getCanonicalType(Canonical); 3183 return Context.getTypedefType(Decl, Canonical); 3184 } 3185 3186 case TYPE_TYPEOF_EXPR: 3187 return Context.getTypeOfExprType(ReadExpr(*Loc.F)); 3188 3189 case TYPE_TYPEOF: { 3190 if (Record.size() != 1) { 3191 Error("incorrect encoding of typeof(type) in AST file"); 3192 return QualType(); 3193 } 3194 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3195 return Context.getTypeOfType(UnderlyingType); 3196 } 3197 3198 case TYPE_DECLTYPE: 3199 return Context.getDecltypeType(ReadExpr(*Loc.F)); 3200 3201 case TYPE_UNARY_TRANSFORM: { 3202 QualType BaseType = readType(*Loc.F, Record, Idx); 3203 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3204 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; 3205 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind); 3206 } 3207 3208 case TYPE_AUTO: 3209 return Context.getAutoType(readType(*Loc.F, Record, Idx)); 3210 3211 case TYPE_RECORD: { 3212 if (Record.size() != 2) { 3213 Error("incorrect encoding of record type"); 3214 return QualType(); 3215 } 3216 unsigned Idx = 0; 3217 bool IsDependent = Record[Idx++]; 3218 QualType T 3219 = Context.getRecordType(ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx)); 3220 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3221 return T; 3222 } 3223 3224 case TYPE_ENUM: { 3225 if (Record.size() != 2) { 3226 Error("incorrect encoding of enum type"); 3227 return QualType(); 3228 } 3229 unsigned Idx = 0; 3230 bool IsDependent = Record[Idx++]; 3231 QualType T 3232 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); 3233 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3234 return T; 3235 } 3236 3237 case TYPE_ATTRIBUTED: { 3238 if (Record.size() != 3) { 3239 Error("incorrect encoding of attributed type"); 3240 return QualType(); 3241 } 3242 QualType modifiedType = readType(*Loc.F, Record, Idx); 3243 QualType equivalentType = readType(*Loc.F, Record, Idx); 3244 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3245 return Context.getAttributedType(kind, modifiedType, equivalentType); 3246 } 3247 3248 case TYPE_PAREN: { 3249 if (Record.size() != 1) { 3250 Error("incorrect encoding of paren type"); 3251 return QualType(); 3252 } 3253 QualType InnerType = readType(*Loc.F, Record, Idx); 3254 return Context.getParenType(InnerType); 3255 } 3256 3257 case TYPE_PACK_EXPANSION: { 3258 if (Record.size() != 2) { 3259 Error("incorrect encoding of pack expansion type"); 3260 return QualType(); 3261 } 3262 QualType Pattern = readType(*Loc.F, Record, Idx); 3263 if (Pattern.isNull()) 3264 return QualType(); 3265 llvm::Optional<unsigned> NumExpansions; 3266 if (Record[1]) 3267 NumExpansions = Record[1] - 1; 3268 return Context.getPackExpansionType(Pattern, NumExpansions); 3269 } 3270 3271 case TYPE_ELABORATED: { 3272 unsigned Idx = 0; 3273 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3274 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3275 QualType NamedType = readType(*Loc.F, Record, Idx); 3276 return Context.getElaboratedType(Keyword, NNS, NamedType); 3277 } 3278 3279 case TYPE_OBJC_INTERFACE: { 3280 unsigned Idx = 0; 3281 ObjCInterfaceDecl *ItfD 3282 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); 3283 return Context.getObjCInterfaceType(ItfD); 3284 } 3285 3286 case TYPE_OBJC_OBJECT: { 3287 unsigned Idx = 0; 3288 QualType Base = readType(*Loc.F, Record, Idx); 3289 unsigned NumProtos = Record[Idx++]; 3290 SmallVector<ObjCProtocolDecl*, 4> Protos; 3291 for (unsigned I = 0; I != NumProtos; ++I) 3292 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); 3293 return Context.getObjCObjectType(Base, Protos.data(), NumProtos); 3294 } 3295 3296 case TYPE_OBJC_OBJECT_POINTER: { 3297 unsigned Idx = 0; 3298 QualType Pointee = readType(*Loc.F, Record, Idx); 3299 return Context.getObjCObjectPointerType(Pointee); 3300 } 3301 3302 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3303 unsigned Idx = 0; 3304 QualType Parm = readType(*Loc.F, Record, Idx); 3305 QualType Replacement = readType(*Loc.F, Record, Idx); 3306 return 3307 Context.getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3308 Replacement); 3309 } 3310 3311 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3312 unsigned Idx = 0; 3313 QualType Parm = readType(*Loc.F, Record, Idx); 3314 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3315 return Context.getSubstTemplateTypeParmPackType( 3316 cast<TemplateTypeParmType>(Parm), 3317 ArgPack); 3318 } 3319 3320 case TYPE_INJECTED_CLASS_NAME: { 3321 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); 3322 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable 3323 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3324 // for AST reading, too much interdependencies. 3325 return 3326 QualType(new (Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3327 } 3328 3329 case TYPE_TEMPLATE_TYPE_PARM: { 3330 unsigned Idx = 0; 3331 unsigned Depth = Record[Idx++]; 3332 unsigned Index = Record[Idx++]; 3333 bool Pack = Record[Idx++]; 3334 TemplateTypeParmDecl *D 3335 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); 3336 return Context.getTemplateTypeParmType(Depth, Index, Pack, D); 3337 } 3338 3339 case TYPE_DEPENDENT_NAME: { 3340 unsigned Idx = 0; 3341 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3342 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3343 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3344 QualType Canon = readType(*Loc.F, Record, Idx); 3345 if (!Canon.isNull()) 3346 Canon = Context.getCanonicalType(Canon); 3347 return Context.getDependentNameType(Keyword, NNS, Name, Canon); 3348 } 3349 3350 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3351 unsigned Idx = 0; 3352 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3353 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3354 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3355 unsigned NumArgs = Record[Idx++]; 3356 SmallVector<TemplateArgument, 8> Args; 3357 Args.reserve(NumArgs); 3358 while (NumArgs--) 3359 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3360 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name, 3361 Args.size(), Args.data()); 3362 } 3363 3364 case TYPE_DEPENDENT_SIZED_ARRAY: { 3365 unsigned Idx = 0; 3366 3367 // ArrayType 3368 QualType ElementType = readType(*Loc.F, Record, Idx); 3369 ArrayType::ArraySizeModifier ASM 3370 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3371 unsigned IndexTypeQuals = Record[Idx++]; 3372 3373 // DependentSizedArrayType 3374 Expr *NumElts = ReadExpr(*Loc.F); 3375 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3376 3377 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM, 3378 IndexTypeQuals, Brackets); 3379 } 3380 3381 case TYPE_TEMPLATE_SPECIALIZATION: { 3382 unsigned Idx = 0; 3383 bool IsDependent = Record[Idx++]; 3384 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3385 SmallVector<TemplateArgument, 8> Args; 3386 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3387 QualType Underlying = readType(*Loc.F, Record, Idx); 3388 QualType T; 3389 if (Underlying.isNull()) 3390 T = Context.getCanonicalTemplateSpecializationType(Name, Args.data(), 3391 Args.size()); 3392 else 3393 T = Context.getTemplateSpecializationType(Name, Args.data(), 3394 Args.size(), Underlying); 3395 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3396 return T; 3397 } 3398 } 3399 // Suppress a GCC warning 3400 return QualType(); 3401} 3402 3403class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3404 ASTReader &Reader; 3405 Module &F; 3406 llvm::BitstreamCursor &DeclsCursor; 3407 const ASTReader::RecordData &Record; 3408 unsigned &Idx; 3409 3410 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3411 unsigned &I) { 3412 return Reader.ReadSourceLocation(F, R, I); 3413 } 3414 3415 template<typename T> 3416 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { 3417 return Reader.ReadDeclAs<T>(F, Record, Idx); 3418 } 3419 3420public: 3421 TypeLocReader(ASTReader &Reader, Module &F, 3422 const ASTReader::RecordData &Record, unsigned &Idx) 3423 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3424 { } 3425 3426 // We want compile-time assurance that we've enumerated all of 3427 // these, so unfortunately we have to declare them first, then 3428 // define them out-of-line. 3429#define ABSTRACT_TYPELOC(CLASS, PARENT) 3430#define TYPELOC(CLASS, PARENT) \ 3431 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3432#include "clang/AST/TypeLocNodes.def" 3433 3434 void VisitFunctionTypeLoc(FunctionTypeLoc); 3435 void VisitArrayTypeLoc(ArrayTypeLoc); 3436}; 3437 3438void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3439 // nothing to do 3440} 3441void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3442 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3443 if (TL.needsExtraLocalData()) { 3444 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3445 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3446 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3447 TL.setModeAttr(Record[Idx++]); 3448 } 3449} 3450void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3451 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3452} 3453void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3454 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3455} 3456void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3457 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3458} 3459void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3460 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3461} 3462void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3463 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3464} 3465void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3466 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3467 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3468} 3469void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3470 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3471 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3472 if (Record[Idx++]) 3473 TL.setSizeExpr(Reader.ReadExpr(F)); 3474 else 3475 TL.setSizeExpr(0); 3476} 3477void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3478 VisitArrayTypeLoc(TL); 3479} 3480void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3481 VisitArrayTypeLoc(TL); 3482} 3483void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3484 VisitArrayTypeLoc(TL); 3485} 3486void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3487 DependentSizedArrayTypeLoc TL) { 3488 VisitArrayTypeLoc(TL); 3489} 3490void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3491 DependentSizedExtVectorTypeLoc TL) { 3492 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3493} 3494void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3495 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3496} 3497void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3498 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3499} 3500void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3501 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); 3502 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); 3503 TL.setTrailingReturn(Record[Idx++]); 3504 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3505 TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); 3506 } 3507} 3508void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3509 VisitFunctionTypeLoc(TL); 3510} 3511void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3512 VisitFunctionTypeLoc(TL); 3513} 3514void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3515 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3516} 3517void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3518 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3519} 3520void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3521 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3522 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3523 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3524} 3525void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3526 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3527 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3528 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3529 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3530} 3531void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3532 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3533} 3534void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 3535 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 3536 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3537 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3538 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3539} 3540void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3541 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3542} 3543void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3544 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3545} 3546void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3547 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3548} 3549void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3550 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3551 if (TL.hasAttrOperand()) { 3552 SourceRange range; 3553 range.setBegin(ReadSourceLocation(Record, Idx)); 3554 range.setEnd(ReadSourceLocation(Record, Idx)); 3555 TL.setAttrOperandParensRange(range); 3556 } 3557 if (TL.hasAttrExprOperand()) { 3558 if (Record[Idx++]) 3559 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3560 else 3561 TL.setAttrExprOperand(0); 3562 } else if (TL.hasAttrEnumOperand()) 3563 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3564} 3565void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3566 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3567} 3568void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3569 SubstTemplateTypeParmTypeLoc TL) { 3570 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3571} 3572void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3573 SubstTemplateTypeParmPackTypeLoc TL) { 3574 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3575} 3576void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3577 TemplateSpecializationTypeLoc TL) { 3578 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3579 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3580 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3581 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3582 TL.setArgLocInfo(i, 3583 Reader.GetTemplateArgumentLocInfo(F, 3584 TL.getTypePtr()->getArg(i).getKind(), 3585 Record, Idx)); 3586} 3587void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3588 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3589 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3590} 3591void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3592 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3593 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3594} 3595void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3596 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3597} 3598void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3599 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3600 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3601 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3602} 3603void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3604 DependentTemplateSpecializationTypeLoc TL) { 3605 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3606 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3607 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3608 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3609 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3610 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3611 TL.setArgLocInfo(I, 3612 Reader.GetTemplateArgumentLocInfo(F, 3613 TL.getTypePtr()->getArg(I).getKind(), 3614 Record, Idx)); 3615} 3616void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3617 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3618} 3619void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3620 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3621} 3622void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3623 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3624 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3625 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3626 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3627 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3628} 3629void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3630 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3631} 3632 3633TypeSourceInfo *ASTReader::GetTypeSourceInfo(Module &F, 3634 const RecordData &Record, 3635 unsigned &Idx) { 3636 QualType InfoTy = readType(F, Record, Idx); 3637 if (InfoTy.isNull()) 3638 return 0; 3639 3640 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy); 3641 TypeLocReader TLR(*this, F, Record, Idx); 3642 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3643 TLR.Visit(TL); 3644 return TInfo; 3645} 3646 3647QualType ASTReader::GetType(TypeID ID) { 3648 unsigned FastQuals = ID & Qualifiers::FastMask; 3649 unsigned Index = ID >> Qualifiers::FastWidth; 3650 3651 if (Index < NUM_PREDEF_TYPE_IDS) { 3652 QualType T; 3653 switch ((PredefinedTypeIDs)Index) { 3654 case PREDEF_TYPE_NULL_ID: return QualType(); 3655 case PREDEF_TYPE_VOID_ID: T = Context.VoidTy; break; 3656 case PREDEF_TYPE_BOOL_ID: T = Context.BoolTy; break; 3657 3658 case PREDEF_TYPE_CHAR_U_ID: 3659 case PREDEF_TYPE_CHAR_S_ID: 3660 // FIXME: Check that the signedness of CharTy is correct! 3661 T = Context.CharTy; 3662 break; 3663 3664 case PREDEF_TYPE_UCHAR_ID: T = Context.UnsignedCharTy; break; 3665 case PREDEF_TYPE_USHORT_ID: T = Context.UnsignedShortTy; break; 3666 case PREDEF_TYPE_UINT_ID: T = Context.UnsignedIntTy; break; 3667 case PREDEF_TYPE_ULONG_ID: T = Context.UnsignedLongTy; break; 3668 case PREDEF_TYPE_ULONGLONG_ID: T = Context.UnsignedLongLongTy; break; 3669 case PREDEF_TYPE_UINT128_ID: T = Context.UnsignedInt128Ty; break; 3670 case PREDEF_TYPE_SCHAR_ID: T = Context.SignedCharTy; break; 3671 case PREDEF_TYPE_WCHAR_ID: T = Context.WCharTy; break; 3672 case PREDEF_TYPE_SHORT_ID: T = Context.ShortTy; break; 3673 case PREDEF_TYPE_INT_ID: T = Context.IntTy; break; 3674 case PREDEF_TYPE_LONG_ID: T = Context.LongTy; break; 3675 case PREDEF_TYPE_LONGLONG_ID: T = Context.LongLongTy; break; 3676 case PREDEF_TYPE_INT128_ID: T = Context.Int128Ty; break; 3677 case PREDEF_TYPE_FLOAT_ID: T = Context.FloatTy; break; 3678 case PREDEF_TYPE_DOUBLE_ID: T = Context.DoubleTy; break; 3679 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context.LongDoubleTy; break; 3680 case PREDEF_TYPE_OVERLOAD_ID: T = Context.OverloadTy; break; 3681 case PREDEF_TYPE_BOUND_MEMBER: T = Context.BoundMemberTy; break; 3682 case PREDEF_TYPE_DEPENDENT_ID: T = Context.DependentTy; break; 3683 case PREDEF_TYPE_UNKNOWN_ANY: T = Context.UnknownAnyTy; break; 3684 case PREDEF_TYPE_NULLPTR_ID: T = Context.NullPtrTy; break; 3685 case PREDEF_TYPE_CHAR16_ID: T = Context.Char16Ty; break; 3686 case PREDEF_TYPE_CHAR32_ID: T = Context.Char32Ty; break; 3687 case PREDEF_TYPE_OBJC_ID: T = Context.ObjCBuiltinIdTy; break; 3688 case PREDEF_TYPE_OBJC_CLASS: T = Context.ObjCBuiltinClassTy; break; 3689 case PREDEF_TYPE_OBJC_SEL: T = Context.ObjCBuiltinSelTy; break; 3690 case PREDEF_TYPE_AUTO_DEDUCT: T = Context.getAutoDeductType(); break; 3691 3692 case PREDEF_TYPE_AUTO_RREF_DEDUCT: 3693 T = Context.getAutoRRefDeductType(); 3694 break; 3695 } 3696 3697 assert(!T.isNull() && "Unknown predefined type"); 3698 return T.withFastQualifiers(FastQuals); 3699 } 3700 3701 Index -= NUM_PREDEF_TYPE_IDS; 3702 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 3703 if (TypesLoaded[Index].isNull()) { 3704 TypesLoaded[Index] = readTypeRecord(Index); 3705 if (TypesLoaded[Index].isNull()) 3706 return QualType(); 3707 3708 TypesLoaded[Index]->setFromAST(); 3709 if (DeserializationListener) 3710 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 3711 TypesLoaded[Index]); 3712 } 3713 3714 return TypesLoaded[Index].withFastQualifiers(FastQuals); 3715} 3716 3717QualType ASTReader::getLocalType(Module &F, unsigned LocalID) { 3718 return GetType(getGlobalTypeID(F, LocalID)); 3719} 3720 3721serialization::TypeID 3722ASTReader::getGlobalTypeID(Module &F, unsigned LocalID) const { 3723 unsigned FastQuals = LocalID & Qualifiers::FastMask; 3724 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; 3725 3726 if (LocalIndex < NUM_PREDEF_TYPE_IDS) 3727 return LocalID; 3728 3729 ContinuousRangeMap<uint32_t, int, 2>::iterator I 3730 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); 3731 assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); 3732 3733 unsigned GlobalIndex = LocalIndex + I->second; 3734 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; 3735} 3736 3737TemplateArgumentLocInfo 3738ASTReader::GetTemplateArgumentLocInfo(Module &F, 3739 TemplateArgument::ArgKind Kind, 3740 const RecordData &Record, 3741 unsigned &Index) { 3742 switch (Kind) { 3743 case TemplateArgument::Expression: 3744 return ReadExpr(F); 3745 case TemplateArgument::Type: 3746 return GetTypeSourceInfo(F, Record, Index); 3747 case TemplateArgument::Template: { 3748 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 3749 Index); 3750 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3751 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 3752 SourceLocation()); 3753 } 3754 case TemplateArgument::TemplateExpansion: { 3755 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 3756 Index); 3757 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3758 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 3759 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 3760 EllipsisLoc); 3761 } 3762 case TemplateArgument::Null: 3763 case TemplateArgument::Integral: 3764 case TemplateArgument::Declaration: 3765 case TemplateArgument::Pack: 3766 return TemplateArgumentLocInfo(); 3767 } 3768 llvm_unreachable("unexpected template argument loc"); 3769 return TemplateArgumentLocInfo(); 3770} 3771 3772TemplateArgumentLoc 3773ASTReader::ReadTemplateArgumentLoc(Module &F, 3774 const RecordData &Record, unsigned &Index) { 3775 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 3776 3777 if (Arg.getKind() == TemplateArgument::Expression) { 3778 if (Record[Index++]) // bool InfoHasSameExpr. 3779 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 3780 } 3781 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 3782 Record, Index)); 3783} 3784 3785Decl *ASTReader::GetExternalDecl(uint32_t ID) { 3786 return GetDecl(ID); 3787} 3788 3789uint64_t ASTReader::readCXXBaseSpecifiers(Module &M, const RecordData &Record, 3790 unsigned &Idx){ 3791 if (Idx >= Record.size()) 3792 return 0; 3793 3794 unsigned LocalID = Record[Idx++]; 3795 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); 3796} 3797 3798CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 3799 RecordLocation Loc = getLocalBitOffset(Offset); 3800 llvm::BitstreamCursor &Cursor = Loc.F->DeclsCursor; 3801 SavedStreamPosition SavedPosition(Cursor); 3802 Cursor.JumpToBit(Loc.Offset); 3803 ReadingKindTracker ReadingKind(Read_Decl, *this); 3804 RecordData Record; 3805 unsigned Code = Cursor.ReadCode(); 3806 unsigned RecCode = Cursor.ReadRecord(Code, Record); 3807 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 3808 Error("Malformed AST file: missing C++ base specifiers"); 3809 return 0; 3810 } 3811 3812 unsigned Idx = 0; 3813 unsigned NumBases = Record[Idx++]; 3814 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases); 3815 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 3816 for (unsigned I = 0; I != NumBases; ++I) 3817 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); 3818 return Bases; 3819} 3820 3821serialization::DeclID 3822ASTReader::getGlobalDeclID(Module &F, unsigned LocalID) const { 3823 if (LocalID < NUM_PREDEF_DECL_IDS) 3824 return LocalID; 3825 3826 ContinuousRangeMap<uint32_t, int, 2>::iterator I 3827 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); 3828 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); 3829 3830 return LocalID + I->second; 3831} 3832 3833bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID, 3834 Module &M) const { 3835 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(ID); 3836 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map"); 3837 return &M == I->second; 3838} 3839 3840Decl *ASTReader::GetDecl(DeclID ID) { 3841 if (ID < NUM_PREDEF_DECL_IDS) { 3842 switch ((PredefinedDeclIDs)ID) { 3843 case PREDEF_DECL_NULL_ID: 3844 return 0; 3845 3846 case PREDEF_DECL_TRANSLATION_UNIT_ID: 3847 return Context.getTranslationUnitDecl(); 3848 3849 case PREDEF_DECL_OBJC_ID_ID: 3850 return Context.getObjCIdDecl(); 3851 3852 case PREDEF_DECL_OBJC_SEL_ID: 3853 return Context.getObjCSelDecl(); 3854 3855 case PREDEF_DECL_OBJC_CLASS_ID: 3856 return Context.getObjCClassDecl(); 3857 3858 case PREDEF_DECL_INT_128_ID: 3859 return Context.getInt128Decl(); 3860 3861 case PREDEF_DECL_UNSIGNED_INT_128_ID: 3862 return Context.getUInt128Decl(); 3863 3864 case PREDEF_DECL_OBJC_INSTANCETYPE_ID: 3865 return Context.getObjCInstanceTypeDecl(); 3866 } 3867 3868 return 0; 3869 } 3870 3871 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 3872 3873 if (Index > DeclsLoaded.size()) { 3874 Error("declaration ID out-of-range for AST file"); 3875 return 0; 3876 } 3877 3878if (!DeclsLoaded[Index]) { 3879 ReadDeclRecord(ID); 3880 if (DeserializationListener) 3881 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 3882 } 3883 3884 return DeclsLoaded[Index]; 3885} 3886 3887serialization::DeclID ASTReader::ReadDeclID(Module &F, 3888 const RecordData &Record, 3889 unsigned &Idx) { 3890 if (Idx >= Record.size()) { 3891 Error("Corrupted AST file"); 3892 return 0; 3893 } 3894 3895 return getGlobalDeclID(F, Record[Idx++]); 3896} 3897 3898/// \brief Resolve the offset of a statement into a statement. 3899/// 3900/// This operation will read a new statement from the external 3901/// source each time it is called, and is meant to be used via a 3902/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 3903Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 3904 // Switch case IDs are per Decl. 3905 ClearSwitchCaseIDs(); 3906 3907 // Offset here is a global offset across the entire chain. 3908 RecordLocation Loc = getLocalBitOffset(Offset); 3909 Loc.F->DeclsCursor.JumpToBit(Loc.Offset); 3910 return ReadStmtFromStream(*Loc.F); 3911} 3912 3913namespace { 3914 class FindExternalLexicalDeclsVisitor { 3915 ASTReader &Reader; 3916 const DeclContext *DC; 3917 bool (*isKindWeWant)(Decl::Kind); 3918 3919 SmallVectorImpl<Decl*> &Decls; 3920 bool PredefsVisited[NUM_PREDEF_DECL_IDS]; 3921 3922 public: 3923 FindExternalLexicalDeclsVisitor(ASTReader &Reader, const DeclContext *DC, 3924 bool (*isKindWeWant)(Decl::Kind), 3925 SmallVectorImpl<Decl*> &Decls) 3926 : Reader(Reader), DC(DC), isKindWeWant(isKindWeWant), Decls(Decls) 3927 { 3928 for (unsigned I = 0; I != NUM_PREDEF_DECL_IDS; ++I) 3929 PredefsVisited[I] = false; 3930 } 3931 3932 static bool visit(Module &M, bool Preorder, void *UserData) { 3933 if (Preorder) 3934 return false; 3935 3936 FindExternalLexicalDeclsVisitor *This 3937 = static_cast<FindExternalLexicalDeclsVisitor *>(UserData); 3938 3939 Module::DeclContextInfosMap::iterator Info 3940 = M.DeclContextInfos.find(This->DC); 3941 if (Info == M.DeclContextInfos.end() || !Info->second.LexicalDecls) 3942 return false; 3943 3944 // Load all of the declaration IDs 3945 for (const KindDeclIDPair *ID = Info->second.LexicalDecls, 3946 *IDE = ID + Info->second.NumLexicalDecls; 3947 ID != IDE; ++ID) { 3948 if (This->isKindWeWant && !This->isKindWeWant((Decl::Kind)ID->first)) 3949 continue; 3950 3951 // Don't add predefined declarations to the lexical context more 3952 // than once. 3953 if (ID->second < NUM_PREDEF_DECL_IDS) { 3954 if (This->PredefsVisited[ID->second]) 3955 continue; 3956 3957 This->PredefsVisited[ID->second] = true; 3958 } 3959 3960 if (Decl *D = This->Reader.GetLocalDecl(M, ID->second)) { 3961 if (!This->DC->isDeclInLexicalTraversal(D)) 3962 This->Decls.push_back(D); 3963 } 3964 } 3965 3966 return false; 3967 } 3968 }; 3969} 3970 3971ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 3972 bool (*isKindWeWant)(Decl::Kind), 3973 SmallVectorImpl<Decl*> &Decls) { 3974 // There might be lexical decls in multiple modules, for the TU at 3975 // least. Walk all of the modules in the order they were loaded. 3976 FindExternalLexicalDeclsVisitor Visitor(*this, DC, isKindWeWant, Decls); 3977 ModuleMgr.visitDepthFirst(&FindExternalLexicalDeclsVisitor::visit, &Visitor); 3978 ++NumLexicalDeclContextsRead; 3979 return ELR_Success; 3980} 3981 3982namespace { 3983 /// \brief Module visitor used to perform name lookup into a 3984 /// declaration context. 3985 class DeclContextNameLookupVisitor { 3986 ASTReader &Reader; 3987 const DeclContext *DC; 3988 DeclarationName Name; 3989 SmallVectorImpl<NamedDecl *> &Decls; 3990 3991 public: 3992 DeclContextNameLookupVisitor(ASTReader &Reader, 3993 const DeclContext *DC, DeclarationName Name, 3994 SmallVectorImpl<NamedDecl *> &Decls) 3995 : Reader(Reader), DC(DC), Name(Name), Decls(Decls) { } 3996 3997 static bool visit(Module &M, void *UserData) { 3998 DeclContextNameLookupVisitor *This 3999 = static_cast<DeclContextNameLookupVisitor *>(UserData); 4000 4001 // Check whether we have any visible declaration information for 4002 // this context in this module. 4003 Module::DeclContextInfosMap::iterator Info 4004 = M.DeclContextInfos.find(This->DC); 4005 if (Info == M.DeclContextInfos.end() || !Info->second.NameLookupTableData) 4006 return false; 4007 4008 // Look for this name within this module. 4009 ASTDeclContextNameLookupTable *LookupTable = 4010 (ASTDeclContextNameLookupTable*)Info->second.NameLookupTableData; 4011 ASTDeclContextNameLookupTable::iterator Pos 4012 = LookupTable->find(This->Name); 4013 if (Pos == LookupTable->end()) 4014 return false; 4015 4016 bool FoundAnything = false; 4017 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 4018 for (; Data.first != Data.second; ++Data.first) { 4019 NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M, *Data.first); 4020 if (!ND) 4021 continue; 4022 4023 if (ND->getDeclName() != This->Name) { 4024 assert(!This->Name.getCXXNameType().isNull() && 4025 "Name mismatch without a type"); 4026 continue; 4027 } 4028 4029 // Record this declaration. 4030 FoundAnything = true; 4031 This->Decls.push_back(ND); 4032 } 4033 4034 return FoundAnything; 4035 } 4036 }; 4037} 4038 4039DeclContext::lookup_result 4040ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 4041 DeclarationName Name) { 4042 assert(DC->hasExternalVisibleStorage() && 4043 "DeclContext has no visible decls in storage"); 4044 if (!Name) 4045 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 4046 DeclContext::lookup_iterator(0)); 4047 4048 SmallVector<NamedDecl *, 64> Decls; 4049 DeclContextNameLookupVisitor Visitor(*this, DC, Name, Decls); 4050 ModuleMgr.visit(&DeclContextNameLookupVisitor::visit, &Visitor); 4051 ++NumVisibleDeclContextsRead; 4052 SetExternalVisibleDeclsForName(DC, Name, Decls); 4053 return const_cast<DeclContext*>(DC)->lookup(Name); 4054} 4055 4056/// \brief Under non-PCH compilation the consumer receives the objc methods 4057/// before receiving the implementation, and codegen depends on this. 4058/// We simulate this by deserializing and passing to consumer the methods of the 4059/// implementation before passing the deserialized implementation decl. 4060static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD, 4061 ASTConsumer *Consumer) { 4062 assert(ImplD && Consumer); 4063 4064 for (ObjCImplDecl::method_iterator 4065 I = ImplD->meth_begin(), E = ImplD->meth_end(); I != E; ++I) 4066 Consumer->HandleInterestingDecl(DeclGroupRef(*I)); 4067 4068 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD)); 4069} 4070 4071void ASTReader::PassInterestingDeclsToConsumer() { 4072 assert(Consumer); 4073 while (!InterestingDecls.empty()) { 4074 Decl *D = InterestingDecls.front(); 4075 InterestingDecls.pop_front(); 4076 4077 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D)) 4078 PassObjCImplDeclToConsumer(ImplD, Consumer); 4079 else 4080 Consumer->HandleInterestingDecl(DeclGroupRef(D)); 4081 } 4082} 4083 4084void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 4085 this->Consumer = Consumer; 4086 4087 if (!Consumer) 4088 return; 4089 4090 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 4091 // Force deserialization of this decl, which will cause it to be queued for 4092 // passing to the consumer. 4093 GetDecl(ExternalDefinitions[I]); 4094 } 4095 ExternalDefinitions.clear(); 4096 4097 PassInterestingDeclsToConsumer(); 4098} 4099 4100void ASTReader::PrintStats() { 4101 std::fprintf(stderr, "*** AST File Statistics:\n"); 4102 4103 unsigned NumTypesLoaded 4104 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 4105 QualType()); 4106 unsigned NumDeclsLoaded 4107 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 4108 (Decl *)0); 4109 unsigned NumIdentifiersLoaded 4110 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 4111 IdentifiersLoaded.end(), 4112 (IdentifierInfo *)0); 4113 unsigned NumSelectorsLoaded 4114 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 4115 SelectorsLoaded.end(), 4116 Selector()); 4117 4118 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 4119 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 4120 if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) 4121 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 4122 NumSLocEntriesRead, TotalNumSLocEntries, 4123 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 4124 if (!TypesLoaded.empty()) 4125 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 4126 NumTypesLoaded, (unsigned)TypesLoaded.size(), 4127 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 4128 if (!DeclsLoaded.empty()) 4129 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 4130 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 4131 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 4132 if (!IdentifiersLoaded.empty()) 4133 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 4134 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4135 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4136 if (!SelectorsLoaded.empty()) 4137 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4138 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4139 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4140 if (TotalNumStatements) 4141 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4142 NumStatementsRead, TotalNumStatements, 4143 ((float)NumStatementsRead/TotalNumStatements * 100)); 4144 if (TotalNumMacros) 4145 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4146 NumMacrosRead, TotalNumMacros, 4147 ((float)NumMacrosRead/TotalNumMacros * 100)); 4148 if (TotalLexicalDeclContexts) 4149 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4150 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4151 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4152 * 100)); 4153 if (TotalVisibleDeclContexts) 4154 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4155 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4156 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4157 * 100)); 4158 if (TotalNumMethodPoolEntries) { 4159 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4160 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4161 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4162 * 100)); 4163 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4164 } 4165 std::fprintf(stderr, "\n"); 4166 dump(); 4167 std::fprintf(stderr, "\n"); 4168} 4169 4170template<typename Key, typename Module, unsigned InitialCapacity> 4171static void 4172dumpModuleIDMap(StringRef Name, 4173 const ContinuousRangeMap<Key, Module *, 4174 InitialCapacity> &Map) { 4175 if (Map.begin() == Map.end()) 4176 return; 4177 4178 typedef ContinuousRangeMap<Key, Module *, InitialCapacity> MapType; 4179 llvm::errs() << Name << ":\n"; 4180 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 4181 I != IEnd; ++I) { 4182 llvm::errs() << " " << I->first << " -> " << I->second->FileName 4183 << "\n"; 4184 } 4185} 4186 4187void ASTReader::dump() { 4188 llvm::errs() << "*** PCH/Module Remappings:\n"; 4189 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); 4190 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); 4191 dumpModuleIDMap("Global type map", GlobalTypeMap); 4192 dumpModuleIDMap("Global declaration map", GlobalDeclMap); 4193 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); 4194 dumpModuleIDMap("Global selector map", GlobalSelectorMap); 4195 dumpModuleIDMap("Global preprocessed entity map", 4196 GlobalPreprocessedEntityMap); 4197 4198 llvm::errs() << "\n*** PCH/Modules Loaded:"; 4199 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), 4200 MEnd = ModuleMgr.end(); 4201 M != MEnd; ++M) 4202 (*M)->dump(); 4203} 4204 4205/// Return the amount of memory used by memory buffers, breaking down 4206/// by heap-backed versus mmap'ed memory. 4207void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { 4208 for (ModuleConstIterator I = ModuleMgr.begin(), 4209 E = ModuleMgr.end(); I != E; ++I) { 4210 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { 4211 size_t bytes = buf->getBufferSize(); 4212 switch (buf->getBufferKind()) { 4213 case llvm::MemoryBuffer::MemoryBuffer_Malloc: 4214 sizes.malloc_bytes += bytes; 4215 break; 4216 case llvm::MemoryBuffer::MemoryBuffer_MMap: 4217 sizes.mmap_bytes += bytes; 4218 break; 4219 } 4220 } 4221 } 4222} 4223 4224void ASTReader::InitializeSema(Sema &S) { 4225 SemaObj = &S; 4226 S.ExternalSource = this; 4227 4228 // Makes sure any declarations that were deserialized "too early" 4229 // still get added to the identifier's declaration chains. 4230 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4231 if (SemaObj->TUScope) 4232 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4233 4234 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4235 } 4236 PreloadedDecls.clear(); 4237 4238 // Load the offsets of the declarations that Sema references. 4239 // They will be lazily deserialized when needed. 4240 if (!SemaDeclRefs.empty()) { 4241 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4242 if (!SemaObj->StdNamespace) 4243 SemaObj->StdNamespace = SemaDeclRefs[0]; 4244 if (!SemaObj->StdBadAlloc) 4245 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4246 } 4247 4248 if (!FPPragmaOptions.empty()) { 4249 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4250 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4251 } 4252 4253 if (!OpenCLExtensions.empty()) { 4254 unsigned I = 0; 4255#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4256#include "clang/Basic/OpenCLExtensions.def" 4257 4258 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4259 } 4260} 4261 4262IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4263 IdentifierLookupVisitor Visitor(StringRef(NameStart, NameEnd - NameStart)); 4264 ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor); 4265 return Visitor.getIdentifierInfo(); 4266} 4267 4268namespace clang { 4269 /// \brief An identifier-lookup iterator that enumerates all of the 4270 /// identifiers stored within a set of AST files. 4271 class ASTIdentifierIterator : public IdentifierIterator { 4272 /// \brief The AST reader whose identifiers are being enumerated. 4273 const ASTReader &Reader; 4274 4275 /// \brief The current index into the chain of AST files stored in 4276 /// the AST reader. 4277 unsigned Index; 4278 4279 /// \brief The current position within the identifier lookup table 4280 /// of the current AST file. 4281 ASTIdentifierLookupTable::key_iterator Current; 4282 4283 /// \brief The end position within the identifier lookup table of 4284 /// the current AST file. 4285 ASTIdentifierLookupTable::key_iterator End; 4286 4287 public: 4288 explicit ASTIdentifierIterator(const ASTReader &Reader); 4289 4290 virtual StringRef Next(); 4291 }; 4292} 4293 4294ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4295 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { 4296 ASTIdentifierLookupTable *IdTable 4297 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; 4298 Current = IdTable->key_begin(); 4299 End = IdTable->key_end(); 4300} 4301 4302StringRef ASTIdentifierIterator::Next() { 4303 while (Current == End) { 4304 // If we have exhausted all of our AST files, we're done. 4305 if (Index == 0) 4306 return StringRef(); 4307 4308 --Index; 4309 ASTIdentifierLookupTable *IdTable 4310 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. 4311 IdentifierLookupTable; 4312 Current = IdTable->key_begin(); 4313 End = IdTable->key_end(); 4314 } 4315 4316 // We have any identifiers remaining in the current AST file; return 4317 // the next one. 4318 std::pair<const char*, unsigned> Key = *Current; 4319 ++Current; 4320 return StringRef(Key.first, Key.second); 4321} 4322 4323IdentifierIterator *ASTReader::getIdentifiers() const { 4324 return new ASTIdentifierIterator(*this); 4325} 4326 4327namespace clang { namespace serialization { 4328 class ReadMethodPoolVisitor { 4329 ASTReader &Reader; 4330 Selector Sel; 4331 llvm::SmallVector<ObjCMethodDecl *, 4> InstanceMethods; 4332 llvm::SmallVector<ObjCMethodDecl *, 4> FactoryMethods; 4333 4334 /// \brief Build an ObjCMethodList from a vector of Objective-C method 4335 /// declarations. 4336 ObjCMethodList 4337 buildObjCMethodList(const SmallVectorImpl<ObjCMethodDecl *> &Vec) const 4338 { 4339 ObjCMethodList List; 4340 ObjCMethodList *Prev = 0; 4341 for (unsigned I = 0, N = Vec.size(); I != N; ++I) { 4342 if (!List.Method) { 4343 // This is the first method, which is the easy case. 4344 List.Method = Vec[I]; 4345 Prev = &List; 4346 continue; 4347 } 4348 4349 ObjCMethodList *Mem = 4350 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 4351 Prev->Next = new (Mem) ObjCMethodList(Vec[I], 0); 4352 Prev = Prev->Next; 4353 } 4354 4355 return List; 4356 } 4357 4358 public: 4359 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel) 4360 : Reader(Reader), Sel(Sel) { } 4361 4362 static bool visit(Module &M, void *UserData) { 4363 ReadMethodPoolVisitor *This 4364 = static_cast<ReadMethodPoolVisitor *>(UserData); 4365 4366 if (!M.SelectorLookupTable) 4367 return false; 4368 4369 ASTSelectorLookupTable *PoolTable 4370 = (ASTSelectorLookupTable*)M.SelectorLookupTable; 4371 ASTSelectorLookupTable::iterator Pos = PoolTable->find(This->Sel); 4372 if (Pos == PoolTable->end()) 4373 return false; 4374 4375 ++This->Reader.NumSelectorsRead; 4376 // FIXME: Not quite happy with the statistics here. We probably should 4377 // disable this tracking when called via LoadSelector. 4378 // Also, should entries without methods count as misses? 4379 ++This->Reader.NumMethodPoolEntriesRead; 4380 ASTSelectorLookupTrait::data_type Data = *Pos; 4381 if (This->Reader.DeserializationListener) 4382 This->Reader.DeserializationListener->SelectorRead(Data.ID, 4383 This->Sel); 4384 4385 This->InstanceMethods.append(Data.Instance.begin(), Data.Instance.end()); 4386 This->FactoryMethods.append(Data.Factory.begin(), Data.Factory.end()); 4387 return true; 4388 } 4389 4390 /// \brief Retrieve the instance methods found by this visitor. 4391 ObjCMethodList getInstanceMethods() const { 4392 return buildObjCMethodList(InstanceMethods); 4393 } 4394 4395 /// \brief Retrieve the instance methods found by this visitor. 4396 ObjCMethodList getFactoryMethods() const { 4397 return buildObjCMethodList(FactoryMethods); 4398 } 4399 }; 4400} } // end namespace clang::serialization 4401 4402std::pair<ObjCMethodList, ObjCMethodList> 4403ASTReader::ReadMethodPool(Selector Sel) { 4404 ReadMethodPoolVisitor Visitor(*this, Sel); 4405 ModuleMgr.visit(&ReadMethodPoolVisitor::visit, &Visitor); 4406 std::pair<ObjCMethodList, ObjCMethodList> Result; 4407 Result.first = Visitor.getInstanceMethods(); 4408 Result.second = Visitor.getFactoryMethods(); 4409 4410 if (!Result.first.Method && !Result.second.Method) 4411 ++NumMethodPoolMisses; 4412 return Result; 4413} 4414 4415void ASTReader::ReadKnownNamespaces( 4416 SmallVectorImpl<NamespaceDecl *> &Namespaces) { 4417 Namespaces.clear(); 4418 4419 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { 4420 if (NamespaceDecl *Namespace 4421 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) 4422 Namespaces.push_back(Namespace); 4423 } 4424} 4425 4426void ASTReader::ReadTentativeDefinitions( 4427 SmallVectorImpl<VarDecl *> &TentativeDefs) { 4428 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4429 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); 4430 if (Var) 4431 TentativeDefs.push_back(Var); 4432 } 4433 TentativeDefinitions.clear(); 4434} 4435 4436void ASTReader::ReadUnusedFileScopedDecls( 4437 SmallVectorImpl<const DeclaratorDecl *> &Decls) { 4438 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4439 DeclaratorDecl *D 4440 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4441 if (D) 4442 Decls.push_back(D); 4443 } 4444 UnusedFileScopedDecls.clear(); 4445} 4446 4447void ASTReader::ReadDelegatingConstructors( 4448 SmallVectorImpl<CXXConstructorDecl *> &Decls) { 4449 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { 4450 CXXConstructorDecl *D 4451 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); 4452 if (D) 4453 Decls.push_back(D); 4454 } 4455 DelegatingCtorDecls.clear(); 4456} 4457 4458void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { 4459 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { 4460 TypedefNameDecl *D 4461 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); 4462 if (D) 4463 Decls.push_back(D); 4464 } 4465 ExtVectorDecls.clear(); 4466} 4467 4468void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { 4469 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { 4470 CXXRecordDecl *D 4471 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); 4472 if (D) 4473 Decls.push_back(D); 4474 } 4475 DynamicClasses.clear(); 4476} 4477 4478void 4479ASTReader::ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl *> &Decls) { 4480 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4481 NamedDecl *D 4482 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4483 if (D) 4484 Decls.push_back(D); 4485 } 4486 LocallyScopedExternalDecls.clear(); 4487} 4488 4489void ASTReader::ReadReferencedSelectors( 4490 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { 4491 if (ReferencedSelectorsData.empty()) 4492 return; 4493 4494 // If there are @selector references added them to its pool. This is for 4495 // implementation of -Wselector. 4496 unsigned int DataSize = ReferencedSelectorsData.size()-1; 4497 unsigned I = 0; 4498 while (I < DataSize) { 4499 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); 4500 SourceLocation SelLoc 4501 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); 4502 Sels.push_back(std::make_pair(Sel, SelLoc)); 4503 } 4504 ReferencedSelectorsData.clear(); 4505} 4506 4507void ASTReader::ReadWeakUndeclaredIdentifiers( 4508 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { 4509 if (WeakUndeclaredIdentifiers.empty()) 4510 return; 4511 4512 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { 4513 IdentifierInfo *WeakId 4514 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4515 IdentifierInfo *AliasId 4516 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4517 SourceLocation Loc 4518 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); 4519 bool Used = WeakUndeclaredIdentifiers[I++]; 4520 WeakInfo WI(AliasId, Loc); 4521 WI.setUsed(Used); 4522 WeakIDs.push_back(std::make_pair(WeakId, WI)); 4523 } 4524 WeakUndeclaredIdentifiers.clear(); 4525} 4526 4527void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { 4528 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { 4529 ExternalVTableUse VT; 4530 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4531 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); 4532 VT.DefinitionRequired = VTableUses[Idx++]; 4533 VTables.push_back(VT); 4534 } 4535 4536 VTableUses.clear(); 4537} 4538 4539void ASTReader::ReadPendingInstantiations( 4540 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { 4541 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { 4542 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); 4543 SourceLocation Loc 4544 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); 4545 Pending.push_back(std::make_pair(D, Loc)); 4546 } 4547 PendingInstantiations.clear(); 4548} 4549 4550void ASTReader::LoadSelector(Selector Sel) { 4551 // It would be complicated to avoid reading the methods anyway. So don't. 4552 ReadMethodPool(Sel); 4553} 4554 4555void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { 4556 assert(ID && "Non-zero identifier ID required"); 4557 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4558 IdentifiersLoaded[ID - 1] = II; 4559 if (DeserializationListener) 4560 DeserializationListener->IdentifierRead(ID, II); 4561} 4562 4563/// \brief Set the globally-visible declarations associated with the given 4564/// identifier. 4565/// 4566/// If the AST reader is currently in a state where the given declaration IDs 4567/// cannot safely be resolved, they are queued until it is safe to resolve 4568/// them. 4569/// 4570/// \param II an IdentifierInfo that refers to one or more globally-visible 4571/// declarations. 4572/// 4573/// \param DeclIDs the set of declaration IDs with the name @p II that are 4574/// visible at global scope. 4575/// 4576/// \param Nonrecursive should be true to indicate that the caller knows that 4577/// this call is non-recursive, and therefore the globally-visible declarations 4578/// will not be placed onto the pending queue. 4579void 4580ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4581 const SmallVectorImpl<uint32_t> &DeclIDs, 4582 bool Nonrecursive) { 4583 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4584 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4585 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4586 PII.II = II; 4587 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4588 return; 4589 } 4590 4591 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4592 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4593 if (SemaObj) { 4594 if (SemaObj->TUScope) { 4595 // Introduce this declaration into the translation-unit scope 4596 // and add it to the declaration chain for this identifier, so 4597 // that (unqualified) name lookup will find it. 4598 SemaObj->TUScope->AddDecl(D); 4599 } 4600 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4601 } else { 4602 // Queue this declaration so that it will be added to the 4603 // translation unit scope and identifier's declaration chain 4604 // once a Sema object is known. 4605 PreloadedDecls.push_back(D); 4606 } 4607 } 4608} 4609 4610IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { 4611 if (ID == 0) 4612 return 0; 4613 4614 if (IdentifiersLoaded.empty()) { 4615 Error("no identifier table in AST file"); 4616 return 0; 4617 } 4618 4619 ID -= 1; 4620 if (!IdentifiersLoaded[ID]) { 4621 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); 4622 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); 4623 Module *M = I->second; 4624 unsigned Index = ID - M->BaseIdentifierID; 4625 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; 4626 4627 // All of the strings in the AST file are preceded by a 16-bit length. 4628 // Extract that 16-bit length to avoid having to execute strlen(). 4629 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4630 // unsigned integers. This is important to avoid integer overflow when 4631 // we cast them to 'unsigned'. 4632 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4633 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4634 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4635 IdentifiersLoaded[ID] 4636 = &PP.getIdentifierTable().get(StringRef(Str, StrLen)); 4637 if (DeserializationListener) 4638 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4639 } 4640 4641 return IdentifiersLoaded[ID]; 4642} 4643 4644IdentifierInfo *ASTReader::getLocalIdentifier(Module &M, unsigned LocalID) { 4645 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); 4646} 4647 4648IdentifierID ASTReader::getGlobalIdentifierID(Module &M, unsigned LocalID) { 4649 if (LocalID < NUM_PREDEF_IDENT_IDS) 4650 return LocalID; 4651 4652 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4653 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); 4654 assert(I != M.IdentifierRemap.end() 4655 && "Invalid index into identifier index remap"); 4656 4657 return LocalID + I->second; 4658} 4659 4660bool ASTReader::ReadSLocEntry(int ID) { 4661 return ReadSLocEntryRecord(ID) != Success; 4662} 4663 4664Selector ASTReader::getLocalSelector(Module &M, unsigned LocalID) { 4665 return DecodeSelector(getGlobalSelectorID(M, LocalID)); 4666} 4667 4668Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { 4669 if (ID == 0) 4670 return Selector(); 4671 4672 if (ID > SelectorsLoaded.size()) { 4673 Error("selector ID out of range in AST file"); 4674 return Selector(); 4675 } 4676 4677 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4678 // Load this selector from the selector table. 4679 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); 4680 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); 4681 Module &M = *I->second; 4682 ASTSelectorLookupTrait Trait(*this, M); 4683 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; 4684 SelectorsLoaded[ID - 1] = 4685 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); 4686 if (DeserializationListener) 4687 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4688 } 4689 4690 return SelectorsLoaded[ID - 1]; 4691} 4692 4693Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { 4694 return DecodeSelector(ID); 4695} 4696 4697uint32_t ASTReader::GetNumExternalSelectors() { 4698 // ID 0 (the null selector) is considered an external selector. 4699 return getTotalNumSelectors() + 1; 4700} 4701 4702serialization::SelectorID 4703ASTReader::getGlobalSelectorID(Module &M, unsigned LocalID) const { 4704 if (LocalID < NUM_PREDEF_SELECTOR_IDS) 4705 return LocalID; 4706 4707 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4708 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); 4709 assert(I != M.SelectorRemap.end() 4710 && "Invalid index into identifier index remap"); 4711 4712 return LocalID + I->second; 4713} 4714 4715DeclarationName 4716ASTReader::ReadDeclarationName(Module &F, 4717 const RecordData &Record, unsigned &Idx) { 4718 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4719 switch (Kind) { 4720 case DeclarationName::Identifier: 4721 return DeclarationName(GetIdentifierInfo(F, Record, Idx)); 4722 4723 case DeclarationName::ObjCZeroArgSelector: 4724 case DeclarationName::ObjCOneArgSelector: 4725 case DeclarationName::ObjCMultiArgSelector: 4726 return DeclarationName(ReadSelector(F, Record, Idx)); 4727 4728 case DeclarationName::CXXConstructorName: 4729 return Context.DeclarationNames.getCXXConstructorName( 4730 Context.getCanonicalType(readType(F, Record, Idx))); 4731 4732 case DeclarationName::CXXDestructorName: 4733 return Context.DeclarationNames.getCXXDestructorName( 4734 Context.getCanonicalType(readType(F, Record, Idx))); 4735 4736 case DeclarationName::CXXConversionFunctionName: 4737 return Context.DeclarationNames.getCXXConversionFunctionName( 4738 Context.getCanonicalType(readType(F, Record, Idx))); 4739 4740 case DeclarationName::CXXOperatorName: 4741 return Context.DeclarationNames.getCXXOperatorName( 4742 (OverloadedOperatorKind)Record[Idx++]); 4743 4744 case DeclarationName::CXXLiteralOperatorName: 4745 return Context.DeclarationNames.getCXXLiteralOperatorName( 4746 GetIdentifierInfo(F, Record, Idx)); 4747 4748 case DeclarationName::CXXUsingDirective: 4749 return DeclarationName::getUsingDirectiveName(); 4750 } 4751 4752 // Required to silence GCC warning 4753 return DeclarationName(); 4754} 4755 4756void ASTReader::ReadDeclarationNameLoc(Module &F, 4757 DeclarationNameLoc &DNLoc, 4758 DeclarationName Name, 4759 const RecordData &Record, unsigned &Idx) { 4760 switch (Name.getNameKind()) { 4761 case DeclarationName::CXXConstructorName: 4762 case DeclarationName::CXXDestructorName: 4763 case DeclarationName::CXXConversionFunctionName: 4764 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4765 break; 4766 4767 case DeclarationName::CXXOperatorName: 4768 DNLoc.CXXOperatorName.BeginOpNameLoc 4769 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4770 DNLoc.CXXOperatorName.EndOpNameLoc 4771 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4772 break; 4773 4774 case DeclarationName::CXXLiteralOperatorName: 4775 DNLoc.CXXLiteralOperatorName.OpNameLoc 4776 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4777 break; 4778 4779 case DeclarationName::Identifier: 4780 case DeclarationName::ObjCZeroArgSelector: 4781 case DeclarationName::ObjCOneArgSelector: 4782 case DeclarationName::ObjCMultiArgSelector: 4783 case DeclarationName::CXXUsingDirective: 4784 break; 4785 } 4786} 4787 4788void ASTReader::ReadDeclarationNameInfo(Module &F, 4789 DeclarationNameInfo &NameInfo, 4790 const RecordData &Record, unsigned &Idx) { 4791 NameInfo.setName(ReadDeclarationName(F, Record, Idx)); 4792 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4793 DeclarationNameLoc DNLoc; 4794 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4795 NameInfo.setInfo(DNLoc); 4796} 4797 4798void ASTReader::ReadQualifierInfo(Module &F, QualifierInfo &Info, 4799 const RecordData &Record, unsigned &Idx) { 4800 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4801 unsigned NumTPLists = Record[Idx++]; 4802 Info.NumTemplParamLists = NumTPLists; 4803 if (NumTPLists) { 4804 Info.TemplParamLists = new (Context) TemplateParameterList*[NumTPLists]; 4805 for (unsigned i=0; i != NumTPLists; ++i) 4806 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4807 } 4808} 4809 4810TemplateName 4811ASTReader::ReadTemplateName(Module &F, const RecordData &Record, 4812 unsigned &Idx) { 4813 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 4814 switch (Kind) { 4815 case TemplateName::Template: 4816 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); 4817 4818 case TemplateName::OverloadedTemplate: { 4819 unsigned size = Record[Idx++]; 4820 UnresolvedSet<8> Decls; 4821 while (size--) 4822 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); 4823 4824 return Context.getOverloadedTemplateName(Decls.begin(), Decls.end()); 4825 } 4826 4827 case TemplateName::QualifiedTemplate: { 4828 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 4829 bool hasTemplKeyword = Record[Idx++]; 4830 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); 4831 return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 4832 } 4833 4834 case TemplateName::DependentTemplate: { 4835 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 4836 if (Record[Idx++]) // isIdentifier 4837 return Context.getDependentTemplateName(NNS, 4838 GetIdentifierInfo(F, Record, 4839 Idx)); 4840 return Context.getDependentTemplateName(NNS, 4841 (OverloadedOperatorKind)Record[Idx++]); 4842 } 4843 4844 case TemplateName::SubstTemplateTemplateParm: { 4845 TemplateTemplateParmDecl *param 4846 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 4847 if (!param) return TemplateName(); 4848 TemplateName replacement = ReadTemplateName(F, Record, Idx); 4849 return Context.getSubstTemplateTemplateParm(param, replacement); 4850 } 4851 4852 case TemplateName::SubstTemplateTemplateParmPack: { 4853 TemplateTemplateParmDecl *Param 4854 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 4855 if (!Param) 4856 return TemplateName(); 4857 4858 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 4859 if (ArgPack.getKind() != TemplateArgument::Pack) 4860 return TemplateName(); 4861 4862 return Context.getSubstTemplateTemplateParmPack(Param, ArgPack); 4863 } 4864 } 4865 4866 assert(0 && "Unhandled template name kind!"); 4867 return TemplateName(); 4868} 4869 4870TemplateArgument 4871ASTReader::ReadTemplateArgument(Module &F, 4872 const RecordData &Record, unsigned &Idx) { 4873 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 4874 switch (Kind) { 4875 case TemplateArgument::Null: 4876 return TemplateArgument(); 4877 case TemplateArgument::Type: 4878 return TemplateArgument(readType(F, Record, Idx)); 4879 case TemplateArgument::Declaration: 4880 return TemplateArgument(ReadDecl(F, Record, Idx)); 4881 case TemplateArgument::Integral: { 4882 llvm::APSInt Value = ReadAPSInt(Record, Idx); 4883 QualType T = readType(F, Record, Idx); 4884 return TemplateArgument(Value, T); 4885 } 4886 case TemplateArgument::Template: 4887 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 4888 case TemplateArgument::TemplateExpansion: { 4889 TemplateName Name = ReadTemplateName(F, Record, Idx); 4890 llvm::Optional<unsigned> NumTemplateExpansions; 4891 if (unsigned NumExpansions = Record[Idx++]) 4892 NumTemplateExpansions = NumExpansions - 1; 4893 return TemplateArgument(Name, NumTemplateExpansions); 4894 } 4895 case TemplateArgument::Expression: 4896 return TemplateArgument(ReadExpr(F)); 4897 case TemplateArgument::Pack: { 4898 unsigned NumArgs = Record[Idx++]; 4899 TemplateArgument *Args = new (Context) TemplateArgument[NumArgs]; 4900 for (unsigned I = 0; I != NumArgs; ++I) 4901 Args[I] = ReadTemplateArgument(F, Record, Idx); 4902 return TemplateArgument(Args, NumArgs); 4903 } 4904 } 4905 4906 assert(0 && "Unhandled template argument kind!"); 4907 return TemplateArgument(); 4908} 4909 4910TemplateParameterList * 4911ASTReader::ReadTemplateParameterList(Module &F, 4912 const RecordData &Record, unsigned &Idx) { 4913 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 4914 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 4915 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 4916 4917 unsigned NumParams = Record[Idx++]; 4918 SmallVector<NamedDecl *, 16> Params; 4919 Params.reserve(NumParams); 4920 while (NumParams--) 4921 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); 4922 4923 TemplateParameterList* TemplateParams = 4924 TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc, 4925 Params.data(), Params.size(), RAngleLoc); 4926 return TemplateParams; 4927} 4928 4929void 4930ASTReader:: 4931ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs, 4932 Module &F, const RecordData &Record, 4933 unsigned &Idx) { 4934 unsigned NumTemplateArgs = Record[Idx++]; 4935 TemplArgs.reserve(NumTemplateArgs); 4936 while (NumTemplateArgs--) 4937 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 4938} 4939 4940/// \brief Read a UnresolvedSet structure. 4941void ASTReader::ReadUnresolvedSet(Module &F, UnresolvedSetImpl &Set, 4942 const RecordData &Record, unsigned &Idx) { 4943 unsigned NumDecls = Record[Idx++]; 4944 while (NumDecls--) { 4945 NamedDecl *D = ReadDeclAs<NamedDecl>(F, Record, Idx); 4946 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 4947 Set.addDecl(D, AS); 4948 } 4949} 4950 4951CXXBaseSpecifier 4952ASTReader::ReadCXXBaseSpecifier(Module &F, 4953 const RecordData &Record, unsigned &Idx) { 4954 bool isVirtual = static_cast<bool>(Record[Idx++]); 4955 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 4956 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 4957 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 4958 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 4959 SourceRange Range = ReadSourceRange(F, Record, Idx); 4960 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 4961 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 4962 EllipsisLoc); 4963 Result.setInheritConstructors(inheritConstructors); 4964 return Result; 4965} 4966 4967std::pair<CXXCtorInitializer **, unsigned> 4968ASTReader::ReadCXXCtorInitializers(Module &F, const RecordData &Record, 4969 unsigned &Idx) { 4970 CXXCtorInitializer **CtorInitializers = 0; 4971 unsigned NumInitializers = Record[Idx++]; 4972 if (NumInitializers) { 4973 CtorInitializers 4974 = new (Context) CXXCtorInitializer*[NumInitializers]; 4975 for (unsigned i=0; i != NumInitializers; ++i) { 4976 TypeSourceInfo *BaseClassInfo = 0; 4977 bool IsBaseVirtual = false; 4978 FieldDecl *Member = 0; 4979 IndirectFieldDecl *IndirectMember = 0; 4980 CXXConstructorDecl *Target = 0; 4981 4982 CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; 4983 switch (Type) { 4984 case CTOR_INITIALIZER_BASE: 4985 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 4986 IsBaseVirtual = Record[Idx++]; 4987 break; 4988 4989 case CTOR_INITIALIZER_DELEGATING: 4990 Target = ReadDeclAs<CXXConstructorDecl>(F, Record, Idx); 4991 break; 4992 4993 case CTOR_INITIALIZER_MEMBER: 4994 Member = ReadDeclAs<FieldDecl>(F, Record, Idx); 4995 break; 4996 4997 case CTOR_INITIALIZER_INDIRECT_MEMBER: 4998 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); 4999 break; 5000 } 5001 5002 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 5003 Expr *Init = ReadExpr(F); 5004 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 5005 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 5006 bool IsWritten = Record[Idx++]; 5007 unsigned SourceOrderOrNumArrayIndices; 5008 SmallVector<VarDecl *, 8> Indices; 5009 if (IsWritten) { 5010 SourceOrderOrNumArrayIndices = Record[Idx++]; 5011 } else { 5012 SourceOrderOrNumArrayIndices = Record[Idx++]; 5013 Indices.reserve(SourceOrderOrNumArrayIndices); 5014 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 5015 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); 5016 } 5017 5018 CXXCtorInitializer *BOMInit; 5019 if (Type == CTOR_INITIALIZER_BASE) { 5020 BOMInit = new (Context) CXXCtorInitializer(Context, BaseClassInfo, IsBaseVirtual, 5021 LParenLoc, Init, RParenLoc, 5022 MemberOrEllipsisLoc); 5023 } else if (Type == CTOR_INITIALIZER_DELEGATING) { 5024 BOMInit = new (Context) CXXCtorInitializer(Context, MemberOrEllipsisLoc, LParenLoc, 5025 Target, Init, RParenLoc); 5026 } else if (IsWritten) { 5027 if (Member) 5028 BOMInit = new (Context) CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, 5029 LParenLoc, Init, RParenLoc); 5030 else 5031 BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember, 5032 MemberOrEllipsisLoc, LParenLoc, 5033 Init, RParenLoc); 5034 } else { 5035 BOMInit = CXXCtorInitializer::Create(Context, Member, MemberOrEllipsisLoc, 5036 LParenLoc, Init, RParenLoc, 5037 Indices.data(), Indices.size()); 5038 } 5039 5040 if (IsWritten) 5041 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 5042 CtorInitializers[i] = BOMInit; 5043 } 5044 } 5045 5046 return std::make_pair(CtorInitializers, NumInitializers); 5047} 5048 5049NestedNameSpecifier * 5050ASTReader::ReadNestedNameSpecifier(Module &F, 5051 const RecordData &Record, unsigned &Idx) { 5052 unsigned N = Record[Idx++]; 5053 NestedNameSpecifier *NNS = 0, *Prev = 0; 5054 for (unsigned I = 0; I != N; ++I) { 5055 NestedNameSpecifier::SpecifierKind Kind 5056 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5057 switch (Kind) { 5058 case NestedNameSpecifier::Identifier: { 5059 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5060 NNS = NestedNameSpecifier::Create(Context, Prev, II); 5061 break; 5062 } 5063 5064 case NestedNameSpecifier::Namespace: { 5065 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5066 NNS = NestedNameSpecifier::Create(Context, Prev, NS); 5067 break; 5068 } 5069 5070 case NestedNameSpecifier::NamespaceAlias: { 5071 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5072 NNS = NestedNameSpecifier::Create(Context, Prev, Alias); 5073 break; 5074 } 5075 5076 case NestedNameSpecifier::TypeSpec: 5077 case NestedNameSpecifier::TypeSpecWithTemplate: { 5078 const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); 5079 if (!T) 5080 return 0; 5081 5082 bool Template = Record[Idx++]; 5083 NNS = NestedNameSpecifier::Create(Context, Prev, Template, T); 5084 break; 5085 } 5086 5087 case NestedNameSpecifier::Global: { 5088 NNS = NestedNameSpecifier::GlobalSpecifier(Context); 5089 // No associated value, and there can't be a prefix. 5090 break; 5091 } 5092 } 5093 Prev = NNS; 5094 } 5095 return NNS; 5096} 5097 5098NestedNameSpecifierLoc 5099ASTReader::ReadNestedNameSpecifierLoc(Module &F, const RecordData &Record, 5100 unsigned &Idx) { 5101 unsigned N = Record[Idx++]; 5102 NestedNameSpecifierLocBuilder Builder; 5103 for (unsigned I = 0; I != N; ++I) { 5104 NestedNameSpecifier::SpecifierKind Kind 5105 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5106 switch (Kind) { 5107 case NestedNameSpecifier::Identifier: { 5108 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5109 SourceRange Range = ReadSourceRange(F, Record, Idx); 5110 Builder.Extend(Context, II, Range.getBegin(), Range.getEnd()); 5111 break; 5112 } 5113 5114 case NestedNameSpecifier::Namespace: { 5115 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5116 SourceRange Range = ReadSourceRange(F, Record, Idx); 5117 Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd()); 5118 break; 5119 } 5120 5121 case NestedNameSpecifier::NamespaceAlias: { 5122 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5123 SourceRange Range = ReadSourceRange(F, Record, Idx); 5124 Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd()); 5125 break; 5126 } 5127 5128 case NestedNameSpecifier::TypeSpec: 5129 case NestedNameSpecifier::TypeSpecWithTemplate: { 5130 bool Template = Record[Idx++]; 5131 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 5132 if (!T) 5133 return NestedNameSpecifierLoc(); 5134 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5135 5136 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 5137 Builder.Extend(Context, 5138 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 5139 T->getTypeLoc(), ColonColonLoc); 5140 break; 5141 } 5142 5143 case NestedNameSpecifier::Global: { 5144 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5145 Builder.MakeGlobal(Context, ColonColonLoc); 5146 break; 5147 } 5148 } 5149 } 5150 5151 return Builder.getWithLocInContext(Context); 5152} 5153 5154SourceRange 5155ASTReader::ReadSourceRange(Module &F, const RecordData &Record, 5156 unsigned &Idx) { 5157 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 5158 SourceLocation end = ReadSourceLocation(F, Record, Idx); 5159 return SourceRange(beg, end); 5160} 5161 5162/// \brief Read an integral value 5163llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 5164 unsigned BitWidth = Record[Idx++]; 5165 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 5166 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 5167 Idx += NumWords; 5168 return Result; 5169} 5170 5171/// \brief Read a signed integral value 5172llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 5173 bool isUnsigned = Record[Idx++]; 5174 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 5175} 5176 5177/// \brief Read a floating-point value 5178llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 5179 return llvm::APFloat(ReadAPInt(Record, Idx)); 5180} 5181 5182// \brief Read a string 5183std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 5184 unsigned Len = Record[Idx++]; 5185 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 5186 Idx += Len; 5187 return Result; 5188} 5189 5190VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, 5191 unsigned &Idx) { 5192 unsigned Major = Record[Idx++]; 5193 unsigned Minor = Record[Idx++]; 5194 unsigned Subminor = Record[Idx++]; 5195 if (Minor == 0) 5196 return VersionTuple(Major); 5197 if (Subminor == 0) 5198 return VersionTuple(Major, Minor - 1); 5199 return VersionTuple(Major, Minor - 1, Subminor - 1); 5200} 5201 5202CXXTemporary *ASTReader::ReadCXXTemporary(Module &F, 5203 const RecordData &Record, 5204 unsigned &Idx) { 5205 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); 5206 return CXXTemporary::Create(Context, Decl); 5207} 5208 5209DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 5210 return Diag(SourceLocation(), DiagID); 5211} 5212 5213DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 5214 return Diags.Report(Loc, DiagID); 5215} 5216 5217/// \brief Retrieve the identifier table associated with the 5218/// preprocessor. 5219IdentifierTable &ASTReader::getIdentifierTable() { 5220 return PP.getIdentifierTable(); 5221} 5222 5223/// \brief Record that the given ID maps to the given switch-case 5224/// statement. 5225void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 5226 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 5227 SwitchCaseStmts[ID] = SC; 5228} 5229 5230/// \brief Retrieve the switch-case statement with the given ID. 5231SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 5232 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 5233 return SwitchCaseStmts[ID]; 5234} 5235 5236void ASTReader::ClearSwitchCaseIDs() { 5237 SwitchCaseStmts.clear(); 5238} 5239 5240void ASTReader::FinishedDeserializing() { 5241 assert(NumCurrentElementsDeserializing && 5242 "FinishedDeserializing not paired with StartedDeserializing"); 5243 if (NumCurrentElementsDeserializing == 1) { 5244 // If any identifiers with corresponding top-level declarations have 5245 // been loaded, load those declarations now. 5246 while (!PendingIdentifierInfos.empty()) { 5247 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 5248 PendingIdentifierInfos.front().DeclIDs, true); 5249 PendingIdentifierInfos.pop_front(); 5250 } 5251 5252 // Ready to load previous declarations of Decls that were delayed. 5253 while (!PendingPreviousDecls.empty()) { 5254 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 5255 PendingPreviousDecls.front().second); 5256 PendingPreviousDecls.pop_front(); 5257 } 5258 5259 // We are not in recursive loading, so it's safe to pass the "interesting" 5260 // decls to the consumer. 5261 if (Consumer) 5262 PassInterestingDeclsToConsumer(); 5263 5264 assert(PendingForwardRefs.size() == 0 && 5265 "Some forward refs did not get linked to the definition!"); 5266 } 5267 --NumCurrentElementsDeserializing; 5268} 5269 5270ASTReader::ASTReader(Preprocessor &PP, ASTContext &Context, 5271 StringRef isysroot, bool DisableValidation, 5272 bool DisableStatCache) 5273 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 5274 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 5275 Diags(PP.getDiagnostics()), SemaObj(0), PP(PP), Context(Context), 5276 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5277 RelocatablePCH(false), isysroot(isysroot), 5278 DisableValidation(DisableValidation), 5279 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 5280 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 5281 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 5282 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 5283 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 5284 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 5285 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 5286 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), 5287 NumCXXBaseSpecifiersLoaded(0) 5288{ 5289 SourceMgr.setExternalSLocEntrySource(this); 5290} 5291 5292ASTReader::~ASTReader() { 5293 for (DeclContextVisibleUpdatesPending::iterator 5294 I = PendingVisibleUpdates.begin(), 5295 E = PendingVisibleUpdates.end(); 5296 I != E; ++I) { 5297 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 5298 F = I->second.end(); 5299 J != F; ++J) 5300 delete static_cast<ASTDeclContextNameLookupTable*>(J->first); 5301 } 5302} 5303