ASTReader.cpp revision 1e12368db12005ddd92fd9188c86383fe30ef443
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 .getLocWithOffset(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 .getLocWithOffset(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 II->setOutOfDate(false); 518 return II; 519 } 520 521 unsigned Bits = ReadUnalignedLE16(d); 522 bool CPlusPlusOperatorKeyword = Bits & 0x01; 523 Bits >>= 1; 524 bool HasRevertedTokenIDToIdentifier = Bits & 0x01; 525 Bits >>= 1; 526 bool Poisoned = Bits & 0x01; 527 Bits >>= 1; 528 bool ExtensionToken = Bits & 0x01; 529 Bits >>= 1; 530 bool hasMacroDefinition = Bits & 0x01; 531 Bits >>= 1; 532 unsigned ObjCOrBuiltinID = Bits & 0x3FF; 533 Bits >>= 10; 534 535 assert(Bits == 0 && "Extra bits in the identifier?"); 536 DataLen -= 6; 537 538 // Build the IdentifierInfo itself and link the identifier ID with 539 // the new IdentifierInfo. 540 IdentifierInfo *II = KnownII; 541 if (!II) 542 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 543 II->setOutOfDate(false); 544 II->setIsFromAST(); 545 546 // Set or check the various bits in the IdentifierInfo structure. 547 // Token IDs are read-only. 548 if (HasRevertedTokenIDToIdentifier) 549 II->RevertTokenIDToIdentifier(); 550 II->setObjCOrBuiltinID(ObjCOrBuiltinID); 551 assert(II->isExtensionToken() == ExtensionToken && 552 "Incorrect extension token flag"); 553 (void)ExtensionToken; 554 if (Poisoned) 555 II->setIsPoisoned(true); 556 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && 557 "Incorrect C++ operator keyword flag"); 558 (void)CPlusPlusOperatorKeyword; 559 560 // If this identifier is a macro, deserialize the macro 561 // definition. 562 if (hasMacroDefinition) { 563 // FIXME: Check for conflicts? 564 uint32_t Offset = ReadUnalignedLE32(d); 565 unsigned LocalSubmoduleID = ReadUnalignedLE32(d); 566 567 // Determine whether this macro definition should be visible now, or 568 // whether it is in a hidden submodule. 569 bool Visible = true; 570 if (SubmoduleID GlobalSubmoduleID 571 = Reader.getGlobalSubmoduleID(F, LocalSubmoduleID)) { 572 if (Module *Owner = Reader.getSubmodule(GlobalSubmoduleID)) { 573 if (Owner->NameVisibility == Module::Hidden) { 574 // The owning module is not visible, and this macro definition should 575 // not be, either. 576 Visible = false; 577 578 // Note that this macro definition was hidden because its owning 579 // module is not yet visible. 580 Reader.HiddenNamesMap[Owner].push_back(II); 581 } 582 } 583 } 584 585 Reader.setIdentifierIsMacro(II, F, Offset, Visible); 586 DataLen -= 8; 587 } 588 589 Reader.SetIdentifierInfo(ID, II); 590 591 // Read all of the declarations visible at global scope with this 592 // name. 593 if (DataLen > 0) { 594 SmallVector<uint32_t, 4> DeclIDs; 595 for (; DataLen > 0; DataLen -= 4) 596 DeclIDs.push_back(Reader.getGlobalDeclID(F, ReadUnalignedLE32(d))); 597 Reader.SetGloballyVisibleDecls(II, DeclIDs); 598 } 599 600 return II; 601} 602 603unsigned 604ASTDeclContextNameLookupTrait::ComputeHash(const DeclNameKey &Key) const { 605 llvm::FoldingSetNodeID ID; 606 ID.AddInteger(Key.Kind); 607 608 switch (Key.Kind) { 609 case DeclarationName::Identifier: 610 case DeclarationName::CXXLiteralOperatorName: 611 ID.AddString(((IdentifierInfo*)Key.Data)->getName()); 612 break; 613 case DeclarationName::ObjCZeroArgSelector: 614 case DeclarationName::ObjCOneArgSelector: 615 case DeclarationName::ObjCMultiArgSelector: 616 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); 617 break; 618 case DeclarationName::CXXOperatorName: 619 ID.AddInteger((OverloadedOperatorKind)Key.Data); 620 break; 621 case DeclarationName::CXXConstructorName: 622 case DeclarationName::CXXDestructorName: 623 case DeclarationName::CXXConversionFunctionName: 624 case DeclarationName::CXXUsingDirective: 625 break; 626 } 627 628 return ID.ComputeHash(); 629} 630 631ASTDeclContextNameLookupTrait::internal_key_type 632ASTDeclContextNameLookupTrait::GetInternalKey( 633 const external_key_type& Name) const { 634 DeclNameKey Key; 635 Key.Kind = Name.getNameKind(); 636 switch (Name.getNameKind()) { 637 case DeclarationName::Identifier: 638 Key.Data = (uint64_t)Name.getAsIdentifierInfo(); 639 break; 640 case DeclarationName::ObjCZeroArgSelector: 641 case DeclarationName::ObjCOneArgSelector: 642 case DeclarationName::ObjCMultiArgSelector: 643 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); 644 break; 645 case DeclarationName::CXXOperatorName: 646 Key.Data = Name.getCXXOverloadedOperator(); 647 break; 648 case DeclarationName::CXXLiteralOperatorName: 649 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); 650 break; 651 case DeclarationName::CXXConstructorName: 652 case DeclarationName::CXXDestructorName: 653 case DeclarationName::CXXConversionFunctionName: 654 case DeclarationName::CXXUsingDirective: 655 Key.Data = 0; 656 break; 657 } 658 659 return Key; 660} 661 662ASTDeclContextNameLookupTrait::external_key_type 663ASTDeclContextNameLookupTrait::GetExternalKey( 664 const internal_key_type& Key) const { 665 ASTContext &Context = Reader.getContext(); 666 switch (Key.Kind) { 667 case DeclarationName::Identifier: 668 return DeclarationName((IdentifierInfo*)Key.Data); 669 670 case DeclarationName::ObjCZeroArgSelector: 671 case DeclarationName::ObjCOneArgSelector: 672 case DeclarationName::ObjCMultiArgSelector: 673 return DeclarationName(Selector(Key.Data)); 674 675 case DeclarationName::CXXConstructorName: 676 return Context.DeclarationNames.getCXXConstructorName( 677 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 678 679 case DeclarationName::CXXDestructorName: 680 return Context.DeclarationNames.getCXXDestructorName( 681 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 682 683 case DeclarationName::CXXConversionFunctionName: 684 return Context.DeclarationNames.getCXXConversionFunctionName( 685 Context.getCanonicalType(Reader.getLocalType(F, Key.Data))); 686 687 case DeclarationName::CXXOperatorName: 688 return Context.DeclarationNames.getCXXOperatorName( 689 (OverloadedOperatorKind)Key.Data); 690 691 case DeclarationName::CXXLiteralOperatorName: 692 return Context.DeclarationNames.getCXXLiteralOperatorName( 693 (IdentifierInfo*)Key.Data); 694 695 case DeclarationName::CXXUsingDirective: 696 return DeclarationName::getUsingDirectiveName(); 697 } 698 699 llvm_unreachable("Invalid Name Kind ?"); 700} 701 702std::pair<unsigned, unsigned> 703ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char*& d) { 704 using namespace clang::io; 705 unsigned KeyLen = ReadUnalignedLE16(d); 706 unsigned DataLen = ReadUnalignedLE16(d); 707 return std::make_pair(KeyLen, DataLen); 708} 709 710ASTDeclContextNameLookupTrait::internal_key_type 711ASTDeclContextNameLookupTrait::ReadKey(const unsigned char* d, unsigned) { 712 using namespace clang::io; 713 714 DeclNameKey Key; 715 Key.Kind = (DeclarationName::NameKind)*d++; 716 switch (Key.Kind) { 717 case DeclarationName::Identifier: 718 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 719 break; 720 case DeclarationName::ObjCZeroArgSelector: 721 case DeclarationName::ObjCOneArgSelector: 722 case DeclarationName::ObjCMultiArgSelector: 723 Key.Data = 724 (uint64_t)Reader.getLocalSelector(F, ReadUnalignedLE32(d)) 725 .getAsOpaquePtr(); 726 break; 727 case DeclarationName::CXXOperatorName: 728 Key.Data = *d++; // OverloadedOperatorKind 729 break; 730 case DeclarationName::CXXLiteralOperatorName: 731 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 732 break; 733 case DeclarationName::CXXConstructorName: 734 case DeclarationName::CXXDestructorName: 735 case DeclarationName::CXXConversionFunctionName: 736 case DeclarationName::CXXUsingDirective: 737 Key.Data = 0; 738 break; 739 } 740 741 return Key; 742} 743 744ASTDeclContextNameLookupTrait::data_type 745ASTDeclContextNameLookupTrait::ReadData(internal_key_type, 746 const unsigned char* d, 747 unsigned DataLen) { 748 using namespace clang::io; 749 unsigned NumDecls = ReadUnalignedLE16(d); 750 DeclID *Start = (DeclID *)d; 751 return std::make_pair(Start, Start + NumDecls); 752} 753 754bool ASTReader::ReadDeclContextStorage(ModuleFile &M, 755 llvm::BitstreamCursor &Cursor, 756 const std::pair<uint64_t, uint64_t> &Offsets, 757 DeclContextInfo &Info) { 758 SavedStreamPosition SavedPosition(Cursor); 759 // First the lexical decls. 760 if (Offsets.first != 0) { 761 Cursor.JumpToBit(Offsets.first); 762 763 RecordData Record; 764 const char *Blob; 765 unsigned BlobLen; 766 unsigned Code = Cursor.ReadCode(); 767 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 768 if (RecCode != DECL_CONTEXT_LEXICAL) { 769 Error("Expected lexical block"); 770 return true; 771 } 772 773 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob); 774 Info.NumLexicalDecls = BlobLen / sizeof(KindDeclIDPair); 775 } 776 777 // Now the lookup table. 778 if (Offsets.second != 0) { 779 Cursor.JumpToBit(Offsets.second); 780 781 RecordData Record; 782 const char *Blob; 783 unsigned BlobLen; 784 unsigned Code = Cursor.ReadCode(); 785 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 786 if (RecCode != DECL_CONTEXT_VISIBLE) { 787 Error("Expected visible lookup table block"); 788 return true; 789 } 790 Info.NameLookupTableData 791 = ASTDeclContextNameLookupTable::Create( 792 (const unsigned char *)Blob + Record[0], 793 (const unsigned char *)Blob, 794 ASTDeclContextNameLookupTrait(*this, M)); 795 } 796 797 return false; 798} 799 800void ASTReader::Error(StringRef Msg) { 801 Error(diag::err_fe_pch_malformed, Msg); 802} 803 804void ASTReader::Error(unsigned DiagID, 805 StringRef Arg1, StringRef Arg2) { 806 if (Diags.isDiagnosticInFlight()) 807 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2); 808 else 809 Diag(DiagID) << Arg1 << Arg2; 810} 811 812/// \brief Tell the AST listener about the predefines buffers in the chain. 813bool ASTReader::CheckPredefinesBuffers() { 814 if (Listener) 815 return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, 816 ActualOriginalFileName, 817 SuggestedPredefines, 818 FileMgr); 819 return false; 820} 821 822//===----------------------------------------------------------------------===// 823// Source Manager Deserialization 824//===----------------------------------------------------------------------===// 825 826/// \brief Read the line table in the source manager block. 827/// \returns true if there was an error. 828bool ASTReader::ParseLineTable(ModuleFile &F, 829 SmallVectorImpl<uint64_t> &Record) { 830 unsigned Idx = 0; 831 LineTableInfo &LineTable = SourceMgr.getLineTable(); 832 833 // Parse the file names 834 std::map<int, int> FileIDs; 835 for (int I = 0, N = Record[Idx++]; I != N; ++I) { 836 // Extract the file name 837 unsigned FilenameLen = Record[Idx++]; 838 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); 839 Idx += FilenameLen; 840 MaybeAddSystemRootToFilename(Filename); 841 FileIDs[I] = LineTable.getLineTableFilenameID(Filename); 842 } 843 844 // Parse the line entries 845 std::vector<LineEntry> Entries; 846 while (Idx < Record.size()) { 847 int FID = Record[Idx++]; 848 assert(FID >= 0 && "Serialized line entries for non-local file."); 849 // Remap FileID from 1-based old view. 850 FID += F.SLocEntryBaseID - 1; 851 852 // Extract the line entries 853 unsigned NumEntries = Record[Idx++]; 854 assert(NumEntries && "Numentries is 00000"); 855 Entries.clear(); 856 Entries.reserve(NumEntries); 857 for (unsigned I = 0; I != NumEntries; ++I) { 858 unsigned FileOffset = Record[Idx++]; 859 unsigned LineNo = Record[Idx++]; 860 int FilenameID = FileIDs[Record[Idx++]]; 861 SrcMgr::CharacteristicKind FileKind 862 = (SrcMgr::CharacteristicKind)Record[Idx++]; 863 unsigned IncludeOffset = Record[Idx++]; 864 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, 865 FileKind, IncludeOffset)); 866 } 867 LineTable.AddEntry(FID, Entries); 868 } 869 870 return false; 871} 872 873namespace { 874 875class ASTStatData { 876public: 877 const ino_t ino; 878 const dev_t dev; 879 const mode_t mode; 880 const time_t mtime; 881 const off_t size; 882 883 ASTStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 884 : ino(i), dev(d), mode(mo), mtime(m), size(s) {} 885}; 886 887class ASTStatLookupTrait { 888 public: 889 typedef const char *external_key_type; 890 typedef const char *internal_key_type; 891 892 typedef ASTStatData data_type; 893 894 static unsigned ComputeHash(const char *path) { 895 return llvm::HashString(path); 896 } 897 898 static internal_key_type GetInternalKey(const char *path) { return path; } 899 900 static bool EqualKey(internal_key_type a, internal_key_type b) { 901 return strcmp(a, b) == 0; 902 } 903 904 static std::pair<unsigned, unsigned> 905 ReadKeyDataLength(const unsigned char*& d) { 906 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 907 unsigned DataLen = (unsigned) *d++; 908 return std::make_pair(KeyLen + 1, DataLen); 909 } 910 911 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 912 return (const char *)d; 913 } 914 915 static data_type ReadData(const internal_key_type, const unsigned char *d, 916 unsigned /*DataLen*/) { 917 using namespace clang::io; 918 919 ino_t ino = (ino_t) ReadUnalignedLE32(d); 920 dev_t dev = (dev_t) ReadUnalignedLE32(d); 921 mode_t mode = (mode_t) ReadUnalignedLE16(d); 922 time_t mtime = (time_t) ReadUnalignedLE64(d); 923 off_t size = (off_t) ReadUnalignedLE64(d); 924 return data_type(ino, dev, mode, mtime, size); 925 } 926}; 927 928/// \brief stat() cache for precompiled headers. 929/// 930/// This cache is very similar to the stat cache used by pretokenized 931/// headers. 932class ASTStatCache : public FileSystemStatCache { 933 typedef OnDiskChainedHashTable<ASTStatLookupTrait> CacheTy; 934 CacheTy *Cache; 935 936 unsigned &NumStatHits, &NumStatMisses; 937public: 938 ASTStatCache(const unsigned char *Buckets, const unsigned char *Base, 939 unsigned &NumStatHits, unsigned &NumStatMisses) 940 : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { 941 Cache = CacheTy::Create(Buckets, Base); 942 } 943 944 ~ASTStatCache() { delete Cache; } 945 946 LookupResult getStat(const char *Path, struct stat &StatBuf, 947 int *FileDescriptor) { 948 // Do the lookup for the file's data in the AST file. 949 CacheTy::iterator I = Cache->find(Path); 950 951 // If we don't get a hit in the AST file just forward to 'stat'. 952 if (I == Cache->end()) { 953 ++NumStatMisses; 954 return statChained(Path, StatBuf, FileDescriptor); 955 } 956 957 ++NumStatHits; 958 ASTStatData Data = *I; 959 960 StatBuf.st_ino = Data.ino; 961 StatBuf.st_dev = Data.dev; 962 StatBuf.st_mtime = Data.mtime; 963 StatBuf.st_mode = Data.mode; 964 StatBuf.st_size = Data.size; 965 return CacheExists; 966 } 967}; 968} // end anonymous namespace 969 970 971/// \brief Read a source manager block 972ASTReader::ASTReadResult ASTReader::ReadSourceManagerBlock(ModuleFile &F) { 973 using namespace SrcMgr; 974 975 llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; 976 977 // Set the source-location entry cursor to the current position in 978 // the stream. This cursor will be used to read the contents of the 979 // source manager block initially, and then lazily read 980 // source-location entries as needed. 981 SLocEntryCursor = F.Stream; 982 983 // The stream itself is going to skip over the source manager block. 984 if (F.Stream.SkipBlock()) { 985 Error("malformed block record in AST file"); 986 return Failure; 987 } 988 989 // Enter the source manager block. 990 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { 991 Error("malformed source manager block record in AST file"); 992 return Failure; 993 } 994 995 RecordData Record; 996 while (true) { 997 unsigned Code = SLocEntryCursor.ReadCode(); 998 if (Code == llvm::bitc::END_BLOCK) { 999 if (SLocEntryCursor.ReadBlockEnd()) { 1000 Error("error at end of Source Manager block in AST file"); 1001 return Failure; 1002 } 1003 return Success; 1004 } 1005 1006 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1007 // No known subblocks, always skip them. 1008 SLocEntryCursor.ReadSubBlockID(); 1009 if (SLocEntryCursor.SkipBlock()) { 1010 Error("malformed block record in AST file"); 1011 return Failure; 1012 } 1013 continue; 1014 } 1015 1016 if (Code == llvm::bitc::DEFINE_ABBREV) { 1017 SLocEntryCursor.ReadAbbrevRecord(); 1018 continue; 1019 } 1020 1021 // Read a record. 1022 const char *BlobStart; 1023 unsigned BlobLen; 1024 Record.clear(); 1025 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1026 default: // Default behavior: ignore. 1027 break; 1028 1029 case SM_SLOC_FILE_ENTRY: 1030 case SM_SLOC_BUFFER_ENTRY: 1031 case SM_SLOC_EXPANSION_ENTRY: 1032 // Once we hit one of the source location entries, we're done. 1033 return Success; 1034 } 1035 } 1036} 1037 1038/// \brief If a header file is not found at the path that we expect it to be 1039/// and the PCH file was moved from its original location, try to resolve the 1040/// file by assuming that header+PCH were moved together and the header is in 1041/// the same place relative to the PCH. 1042static std::string 1043resolveFileRelativeToOriginalDir(const std::string &Filename, 1044 const std::string &OriginalDir, 1045 const std::string &CurrDir) { 1046 assert(OriginalDir != CurrDir && 1047 "No point trying to resolve the file if the PCH dir didn't change"); 1048 using namespace llvm::sys; 1049 llvm::SmallString<128> filePath(Filename); 1050 fs::make_absolute(filePath); 1051 assert(path::is_absolute(OriginalDir)); 1052 llvm::SmallString<128> currPCHPath(CurrDir); 1053 1054 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), 1055 fileDirE = path::end(path::parent_path(filePath)); 1056 path::const_iterator origDirI = path::begin(OriginalDir), 1057 origDirE = path::end(OriginalDir); 1058 // Skip the common path components from filePath and OriginalDir. 1059 while (fileDirI != fileDirE && origDirI != origDirE && 1060 *fileDirI == *origDirI) { 1061 ++fileDirI; 1062 ++origDirI; 1063 } 1064 for (; origDirI != origDirE; ++origDirI) 1065 path::append(currPCHPath, ".."); 1066 path::append(currPCHPath, fileDirI, fileDirE); 1067 path::append(currPCHPath, path::filename(Filename)); 1068 return currPCHPath.str(); 1069} 1070 1071/// \brief Read in the source location entry with the given ID. 1072ASTReader::ASTReadResult ASTReader::ReadSLocEntryRecord(int ID) { 1073 if (ID == 0) 1074 return Success; 1075 1076 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { 1077 Error("source location entry ID out-of-range for AST file"); 1078 return Failure; 1079 } 1080 1081 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second; 1082 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]); 1083 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 1084 unsigned BaseOffset = F->SLocEntryBaseOffset; 1085 1086 ++NumSLocEntriesRead; 1087 unsigned Code = SLocEntryCursor.ReadCode(); 1088 if (Code == llvm::bitc::END_BLOCK || 1089 Code == llvm::bitc::ENTER_SUBBLOCK || 1090 Code == llvm::bitc::DEFINE_ABBREV) { 1091 Error("incorrectly-formatted source location entry in AST file"); 1092 return Failure; 1093 } 1094 1095 RecordData Record; 1096 const char *BlobStart; 1097 unsigned BlobLen; 1098 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1099 default: 1100 Error("incorrectly-formatted source location entry in AST file"); 1101 return Failure; 1102 1103 case SM_SLOC_FILE_ENTRY: { 1104 if (Record.size() < 7) { 1105 Error("source location entry is incorrect"); 1106 return Failure; 1107 } 1108 1109 bool OverriddenBuffer = Record[6]; 1110 1111 std::string OrigFilename(BlobStart, BlobStart + BlobLen); 1112 std::string Filename = OrigFilename; 1113 MaybeAddSystemRootToFilename(Filename); 1114 const FileEntry *File = 1115 OverriddenBuffer? FileMgr.getVirtualFile(Filename, (off_t)Record[4], 1116 (time_t)Record[5]) 1117 : FileMgr.getFile(Filename, /*OpenFile=*/false); 1118 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1119 OriginalDir != CurrentDir) { 1120 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1121 OriginalDir, 1122 CurrentDir); 1123 if (!resolved.empty()) 1124 File = FileMgr.getFile(resolved); 1125 } 1126 if (File == 0) 1127 File = FileMgr.getVirtualFile(Filename, (off_t)Record[4], 1128 (time_t)Record[5]); 1129 if (File == 0) { 1130 std::string ErrorStr = "could not find file '"; 1131 ErrorStr += Filename; 1132 ErrorStr += "' referenced by AST file"; 1133 Error(ErrorStr.c_str()); 1134 return Failure; 1135 } 1136 1137 if (!DisableValidation && 1138 ((off_t)Record[4] != File->getSize() 1139#if !defined(LLVM_ON_WIN32) 1140 // In our regression testing, the Windows file system seems to 1141 // have inconsistent modification times that sometimes 1142 // erroneously trigger this error-handling path. 1143 || (time_t)Record[5] != File->getModificationTime() 1144#endif 1145 )) { 1146 Error(diag::err_fe_pch_file_modified, Filename); 1147 return Failure; 1148 } 1149 1150 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); 1151 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) { 1152 // This is the module's main file. 1153 IncludeLoc = getImportLocation(F); 1154 } 1155 FileID FID = SourceMgr.createFileID(File, IncludeLoc, 1156 (SrcMgr::CharacteristicKind)Record[2], 1157 ID, BaseOffset + Record[0]); 1158 SrcMgr::FileInfo &FileInfo = 1159 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()); 1160 FileInfo.NumCreatedFIDs = Record[7]; 1161 if (Record[3]) 1162 FileInfo.setHasLineDirectives(); 1163 1164 const DeclID *FirstDecl = F->FileSortedDecls + Record[8]; 1165 unsigned NumFileDecls = Record[9]; 1166 if (NumFileDecls) { 1167 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"); 1168 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl, 1169 NumFileDecls)); 1170 } 1171 1172 const SrcMgr::ContentCache *ContentCache 1173 = SourceMgr.getOrCreateContentCache(File); 1174 if (OverriddenBuffer && !ContentCache->BufferOverridden && 1175 ContentCache->ContentsEntry == ContentCache->OrigEntry) { 1176 unsigned Code = SLocEntryCursor.ReadCode(); 1177 Record.clear(); 1178 unsigned RecCode 1179 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1180 1181 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1182 Error("AST record has invalid code"); 1183 return Failure; 1184 } 1185 1186 llvm::MemoryBuffer *Buffer 1187 = llvm::MemoryBuffer::getMemBuffer(StringRef(BlobStart, BlobLen - 1), 1188 Filename); 1189 SourceMgr.overrideFileContents(File, Buffer); 1190 } 1191 break; 1192 } 1193 1194 case SM_SLOC_BUFFER_ENTRY: { 1195 const char *Name = BlobStart; 1196 unsigned Offset = Record[0]; 1197 unsigned Code = SLocEntryCursor.ReadCode(); 1198 Record.clear(); 1199 unsigned RecCode 1200 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1201 1202 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1203 Error("AST record has invalid code"); 1204 return Failure; 1205 } 1206 1207 llvm::MemoryBuffer *Buffer 1208 = llvm::MemoryBuffer::getMemBuffer(StringRef(BlobStart, BlobLen - 1), 1209 Name); 1210 FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, 1211 BaseOffset + Offset); 1212 1213 if (strcmp(Name, "<built-in>") == 0 && F->Kind == MK_PCH) { 1214 PCHPredefinesBlock Block = { 1215 BufferID, 1216 StringRef(BlobStart, BlobLen - 1) 1217 }; 1218 PCHPredefinesBuffers.push_back(Block); 1219 } 1220 1221 break; 1222 } 1223 1224 case SM_SLOC_EXPANSION_ENTRY: { 1225 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); 1226 SourceMgr.createExpansionLoc(SpellingLoc, 1227 ReadSourceLocation(*F, Record[2]), 1228 ReadSourceLocation(*F, Record[3]), 1229 Record[4], 1230 ID, 1231 BaseOffset + Record[0]); 1232 break; 1233 } 1234 } 1235 1236 return Success; 1237} 1238 1239/// \brief Find the location where the module F is imported. 1240SourceLocation ASTReader::getImportLocation(ModuleFile *F) { 1241 if (F->ImportLoc.isValid()) 1242 return F->ImportLoc; 1243 1244 // Otherwise we have a PCH. It's considered to be "imported" at the first 1245 // location of its includer. 1246 if (F->ImportedBy.empty() || !F->ImportedBy[0]) { 1247 // Main file is the importer. We assume that it is the first entry in the 1248 // entry table. We can't ask the manager, because at the time of PCH loading 1249 // the main file entry doesn't exist yet. 1250 // The very first entry is the invalid instantiation loc, which takes up 1251 // offsets 0 and 1. 1252 return SourceLocation::getFromRawEncoding(2U); 1253 } 1254 //return F->Loaders[0]->FirstLoc; 1255 return F->ImportedBy[0]->FirstLoc; 1256} 1257 1258/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the 1259/// specified cursor. Read the abbreviations that are at the top of the block 1260/// and then leave the cursor pointing into the block. 1261bool ASTReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, 1262 unsigned BlockID) { 1263 if (Cursor.EnterSubBlock(BlockID)) { 1264 Error("malformed block record in AST file"); 1265 return Failure; 1266 } 1267 1268 while (true) { 1269 uint64_t Offset = Cursor.GetCurrentBitNo(); 1270 unsigned Code = Cursor.ReadCode(); 1271 1272 // We expect all abbrevs to be at the start of the block. 1273 if (Code != llvm::bitc::DEFINE_ABBREV) { 1274 Cursor.JumpToBit(Offset); 1275 return false; 1276 } 1277 Cursor.ReadAbbrevRecord(); 1278 } 1279} 1280 1281void ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) { 1282 llvm::BitstreamCursor &Stream = F.MacroCursor; 1283 1284 // Keep track of where we are in the stream, then jump back there 1285 // after reading this macro. 1286 SavedStreamPosition SavedPosition(Stream); 1287 1288 Stream.JumpToBit(Offset); 1289 RecordData Record; 1290 SmallVector<IdentifierInfo*, 16> MacroArgs; 1291 MacroInfo *Macro = 0; 1292 1293 while (true) { 1294 unsigned Code = Stream.ReadCode(); 1295 switch (Code) { 1296 case llvm::bitc::END_BLOCK: 1297 return; 1298 1299 case llvm::bitc::ENTER_SUBBLOCK: 1300 // No known subblocks, always skip them. 1301 Stream.ReadSubBlockID(); 1302 if (Stream.SkipBlock()) { 1303 Error("malformed block record in AST file"); 1304 return; 1305 } 1306 continue; 1307 1308 case llvm::bitc::DEFINE_ABBREV: 1309 Stream.ReadAbbrevRecord(); 1310 continue; 1311 default: break; 1312 } 1313 1314 // Read a record. 1315 const char *BlobStart = 0; 1316 unsigned BlobLen = 0; 1317 Record.clear(); 1318 PreprocessorRecordTypes RecType = 1319 (PreprocessorRecordTypes)Stream.ReadRecord(Code, Record, BlobStart, 1320 BlobLen); 1321 switch (RecType) { 1322 case PP_MACRO_OBJECT_LIKE: 1323 case PP_MACRO_FUNCTION_LIKE: { 1324 // If we already have a macro, that means that we've hit the end 1325 // of the definition of the macro we were looking for. We're 1326 // done. 1327 if (Macro) 1328 return; 1329 1330 IdentifierInfo *II = getLocalIdentifier(F, Record[0]); 1331 if (II == 0) { 1332 Error("macro must have a name in AST file"); 1333 return; 1334 } 1335 1336 SourceLocation Loc = ReadSourceLocation(F, Record[1]); 1337 bool isUsed = Record[2]; 1338 1339 MacroInfo *MI = PP.AllocateMacroInfo(Loc); 1340 MI->setIsUsed(isUsed); 1341 MI->setIsFromAST(); 1342 1343 bool IsPublic = Record[3]; 1344 unsigned NextIndex = 4; 1345 MI->setVisibility(IsPublic, ReadSourceLocation(F, Record, NextIndex)); 1346 1347 if (RecType == PP_MACRO_FUNCTION_LIKE) { 1348 // Decode function-like macro info. 1349 bool isC99VarArgs = Record[NextIndex++]; 1350 bool isGNUVarArgs = Record[NextIndex++]; 1351 MacroArgs.clear(); 1352 unsigned NumArgs = Record[NextIndex++]; 1353 for (unsigned i = 0; i != NumArgs; ++i) 1354 MacroArgs.push_back(getLocalIdentifier(F, Record[NextIndex++])); 1355 1356 // Install function-like macro info. 1357 MI->setIsFunctionLike(); 1358 if (isC99VarArgs) MI->setIsC99Varargs(); 1359 if (isGNUVarArgs) MI->setIsGNUVarargs(); 1360 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), 1361 PP.getPreprocessorAllocator()); 1362 } 1363 1364 // Finally, install the macro. 1365 PP.setMacroInfo(II, MI); 1366 1367 // Remember that we saw this macro last so that we add the tokens that 1368 // form its body to it. 1369 Macro = MI; 1370 1371 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() && 1372 Record[NextIndex]) { 1373 // We have a macro definition. Register the association 1374 PreprocessedEntityID 1375 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]); 1376 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); 1377 PPRec.RegisterMacroDefinition(Macro, 1378 PPRec.getPPEntityID(GlobalID-1, /*isLoaded=*/true)); 1379 } 1380 1381 ++NumMacrosRead; 1382 break; 1383 } 1384 1385 case PP_TOKEN: { 1386 // If we see a TOKEN before a PP_MACRO_*, then the file is 1387 // erroneous, just pretend we didn't see this. 1388 if (Macro == 0) break; 1389 1390 Token Tok; 1391 Tok.startToken(); 1392 Tok.setLocation(ReadSourceLocation(F, Record[0])); 1393 Tok.setLength(Record[1]); 1394 if (IdentifierInfo *II = getLocalIdentifier(F, Record[2])) 1395 Tok.setIdentifierInfo(II); 1396 Tok.setKind((tok::TokenKind)Record[3]); 1397 Tok.setFlag((Token::TokenFlags)Record[4]); 1398 Macro->AddTokenToBody(Tok); 1399 break; 1400 } 1401 } 1402 } 1403 1404 return; 1405} 1406 1407PreprocessedEntityID 1408ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M, unsigned LocalID) const { 1409 ContinuousRangeMap<uint32_t, int, 2>::const_iterator 1410 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS); 1411 assert(I != M.PreprocessedEntityRemap.end() 1412 && "Invalid index into preprocessed entity index remap"); 1413 1414 return LocalID + I->second; 1415} 1416 1417unsigned HeaderFileInfoTrait::ComputeHash(const char *path) { 1418 return llvm::HashString(llvm::sys::path::filename(path)); 1419} 1420 1421HeaderFileInfoTrait::internal_key_type 1422HeaderFileInfoTrait::GetInternalKey(const char *path) { return path; } 1423 1424bool HeaderFileInfoTrait::EqualKey(internal_key_type a, internal_key_type b) { 1425 if (strcmp(a, b) == 0) 1426 return true; 1427 1428 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1429 return false; 1430 1431 // The file names match, but the path names don't. stat() the files to 1432 // see if they are the same. 1433 struct stat StatBufA, StatBufB; 1434 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1435 return false; 1436 1437 return StatBufA.st_ino == StatBufB.st_ino; 1438} 1439 1440std::pair<unsigned, unsigned> 1441HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) { 1442 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1443 unsigned DataLen = (unsigned) *d++; 1444 return std::make_pair(KeyLen + 1, DataLen); 1445} 1446 1447HeaderFileInfoTrait::data_type 1448HeaderFileInfoTrait::ReadData(const internal_key_type, const unsigned char *d, 1449 unsigned DataLen) { 1450 const unsigned char *End = d + DataLen; 1451 using namespace clang::io; 1452 HeaderFileInfo HFI; 1453 unsigned Flags = *d++; 1454 HFI.isImport = (Flags >> 5) & 0x01; 1455 HFI.isPragmaOnce = (Flags >> 4) & 0x01; 1456 HFI.DirInfo = (Flags >> 2) & 0x03; 1457 HFI.Resolved = (Flags >> 1) & 0x01; 1458 HFI.IndexHeaderMapHeader = Flags & 0x01; 1459 HFI.NumIncludes = ReadUnalignedLE16(d); 1460 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(M, 1461 ReadUnalignedLE32(d)); 1462 if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { 1463 // The framework offset is 1 greater than the actual offset, 1464 // since 0 is used as an indicator for "no framework name". 1465 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); 1466 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); 1467 } 1468 1469 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1470 (void)End; 1471 1472 // This HeaderFileInfo was externally loaded. 1473 HFI.External = true; 1474 return HFI; 1475} 1476 1477void ASTReader::setIdentifierIsMacro(IdentifierInfo *II, ModuleFile &F, 1478 uint64_t LocalOffset, bool Visible) { 1479 if (Visible) { 1480 // Note that this identifier has a macro definition. 1481 II->setHasMacroDefinition(true); 1482 } 1483 1484 // Adjust the offset to a global offset. 1485 UnreadMacroRecordOffsets[II] = F.GlobalBitOffset + LocalOffset; 1486} 1487 1488void ASTReader::ReadDefinedMacros() { 1489 for (ModuleReverseIterator I = ModuleMgr.rbegin(), 1490 E = ModuleMgr.rend(); I != E; ++I) { 1491 llvm::BitstreamCursor &MacroCursor = (*I)->MacroCursor; 1492 1493 // If there was no preprocessor block, skip this file. 1494 if (!MacroCursor.getBitStreamReader()) 1495 continue; 1496 1497 llvm::BitstreamCursor Cursor = MacroCursor; 1498 Cursor.JumpToBit((*I)->MacroStartOffset); 1499 1500 RecordData Record; 1501 while (true) { 1502 unsigned Code = Cursor.ReadCode(); 1503 if (Code == llvm::bitc::END_BLOCK) 1504 break; 1505 1506 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1507 // No known subblocks, always skip them. 1508 Cursor.ReadSubBlockID(); 1509 if (Cursor.SkipBlock()) { 1510 Error("malformed block record in AST file"); 1511 return; 1512 } 1513 continue; 1514 } 1515 1516 if (Code == llvm::bitc::DEFINE_ABBREV) { 1517 Cursor.ReadAbbrevRecord(); 1518 continue; 1519 } 1520 1521 // Read a record. 1522 const char *BlobStart; 1523 unsigned BlobLen; 1524 Record.clear(); 1525 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1526 default: // Default behavior: ignore. 1527 break; 1528 1529 case PP_MACRO_OBJECT_LIKE: 1530 case PP_MACRO_FUNCTION_LIKE: 1531 getLocalIdentifier(**I, Record[0]); 1532 break; 1533 1534 case PP_TOKEN: 1535 // Ignore tokens. 1536 break; 1537 } 1538 } 1539 } 1540 1541 // Drain the unread macro-record offsets map. 1542 while (!UnreadMacroRecordOffsets.empty()) 1543 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1544} 1545 1546void ASTReader::LoadMacroDefinition( 1547 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1548 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1549 uint64_t Offset = Pos->second; 1550 UnreadMacroRecordOffsets.erase(Pos); 1551 1552 RecordLocation Loc = getLocalBitOffset(Offset); 1553 ReadMacroRecord(*Loc.F, Loc.Offset); 1554} 1555 1556void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1557 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1558 = UnreadMacroRecordOffsets.find(II); 1559 LoadMacroDefinition(Pos); 1560} 1561 1562namespace { 1563 /// \brief Visitor class used to look up identifirs in an AST file. 1564 class IdentifierLookupVisitor { 1565 StringRef Name; 1566 IdentifierInfo *Found; 1567 public: 1568 explicit IdentifierLookupVisitor(StringRef Name) : Name(Name), Found() { } 1569 1570 static bool visit(ModuleFile &M, void *UserData) { 1571 IdentifierLookupVisitor *This 1572 = static_cast<IdentifierLookupVisitor *>(UserData); 1573 1574 ASTIdentifierLookupTable *IdTable 1575 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable; 1576 if (!IdTable) 1577 return false; 1578 1579 std::pair<const char*, unsigned> Key(This->Name.begin(), 1580 This->Name.size()); 1581 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 1582 if (Pos == IdTable->end()) 1583 return false; 1584 1585 // Dereferencing the iterator has the effect of building the 1586 // IdentifierInfo node and populating it with the various 1587 // declarations it needs. 1588 This->Found = *Pos; 1589 return true; 1590 } 1591 1592 // \brief Retrieve the identifier info found within the module 1593 // files. 1594 IdentifierInfo *getIdentifierInfo() const { return Found; } 1595 }; 1596} 1597 1598void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) { 1599 get(II.getName()); 1600} 1601 1602const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { 1603 std::string Filename = filenameStrRef; 1604 MaybeAddSystemRootToFilename(Filename); 1605 const FileEntry *File = FileMgr.getFile(Filename); 1606 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1607 OriginalDir != CurrentDir) { 1608 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1609 OriginalDir, 1610 CurrentDir); 1611 if (!resolved.empty()) 1612 File = FileMgr.getFile(resolved); 1613 } 1614 1615 return File; 1616} 1617 1618/// \brief If we are loading a relocatable PCH file, and the filename is 1619/// not an absolute path, add the system root to the beginning of the file 1620/// name. 1621void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1622 // If this is not a relocatable PCH file, there's nothing to do. 1623 if (!RelocatablePCH) 1624 return; 1625 1626 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1627 return; 1628 1629 if (isysroot.empty()) { 1630 // If no system root was given, default to '/' 1631 Filename.insert(Filename.begin(), '/'); 1632 return; 1633 } 1634 1635 unsigned Length = isysroot.size(); 1636 if (isysroot[Length - 1] != '/') 1637 Filename.insert(Filename.begin(), '/'); 1638 1639 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); 1640} 1641 1642ASTReader::ASTReadResult 1643ASTReader::ReadASTBlock(ModuleFile &F) { 1644 llvm::BitstreamCursor &Stream = F.Stream; 1645 1646 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1647 Error("malformed block record in AST file"); 1648 return Failure; 1649 } 1650 1651 // Read all of the records and blocks for the ASt file. 1652 RecordData Record; 1653 while (!Stream.AtEndOfStream()) { 1654 unsigned Code = Stream.ReadCode(); 1655 if (Code == llvm::bitc::END_BLOCK) { 1656 if (Stream.ReadBlockEnd()) { 1657 Error("error at end of module block in AST file"); 1658 return Failure; 1659 } 1660 1661 return Success; 1662 } 1663 1664 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1665 switch (Stream.ReadSubBlockID()) { 1666 case DECLTYPES_BLOCK_ID: 1667 // We lazily load the decls block, but we want to set up the 1668 // DeclsCursor cursor to point into it. Clone our current bitcode 1669 // cursor to it, enter the block and read the abbrevs in that block. 1670 // With the main cursor, we just skip over it. 1671 F.DeclsCursor = Stream; 1672 if (Stream.SkipBlock() || // Skip with the main cursor. 1673 // Read the abbrevs. 1674 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1675 Error("malformed block record in AST file"); 1676 return Failure; 1677 } 1678 break; 1679 1680 case DECL_UPDATES_BLOCK_ID: 1681 if (Stream.SkipBlock()) { 1682 Error("malformed block record in AST file"); 1683 return Failure; 1684 } 1685 break; 1686 1687 case PREPROCESSOR_BLOCK_ID: 1688 F.MacroCursor = Stream; 1689 if (!PP.getExternalSource()) 1690 PP.setExternalSource(this); 1691 1692 if (Stream.SkipBlock() || 1693 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1694 Error("malformed block record in AST file"); 1695 return Failure; 1696 } 1697 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1698 break; 1699 1700 case PREPROCESSOR_DETAIL_BLOCK_ID: 1701 F.PreprocessorDetailCursor = Stream; 1702 if (Stream.SkipBlock() || 1703 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1704 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1705 Error("malformed preprocessor detail record in AST file"); 1706 return Failure; 1707 } 1708 F.PreprocessorDetailStartOffset 1709 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1710 1711 if (!PP.getPreprocessingRecord()) 1712 PP.createPreprocessingRecord(true); 1713 if (!PP.getPreprocessingRecord()->getExternalSource()) 1714 PP.getPreprocessingRecord()->SetExternalSource(*this); 1715 break; 1716 1717 case SOURCE_MANAGER_BLOCK_ID: 1718 switch (ReadSourceManagerBlock(F)) { 1719 case Success: 1720 break; 1721 1722 case Failure: 1723 Error("malformed source manager block in AST file"); 1724 return Failure; 1725 1726 case IgnorePCH: 1727 return IgnorePCH; 1728 } 1729 break; 1730 1731 case SUBMODULE_BLOCK_ID: 1732 switch (ReadSubmoduleBlock(F)) { 1733 case Success: 1734 break; 1735 1736 case Failure: 1737 Error("malformed submodule block in AST file"); 1738 return Failure; 1739 1740 case IgnorePCH: 1741 return IgnorePCH; 1742 } 1743 break; 1744 1745 default: 1746 if (!Stream.SkipBlock()) 1747 break; 1748 Error("malformed block record in AST file"); 1749 return Failure; 1750 } 1751 continue; 1752 } 1753 1754 if (Code == llvm::bitc::DEFINE_ABBREV) { 1755 Stream.ReadAbbrevRecord(); 1756 continue; 1757 } 1758 1759 // Read and process a record. 1760 Record.clear(); 1761 const char *BlobStart = 0; 1762 unsigned BlobLen = 0; 1763 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 1764 &BlobStart, &BlobLen)) { 1765 default: // Default behavior: ignore. 1766 break; 1767 1768 case METADATA: { 1769 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 1770 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 1771 : diag::warn_pch_version_too_new); 1772 return IgnorePCH; 1773 } 1774 1775 RelocatablePCH = Record[4]; 1776 if (Listener) { 1777 std::string TargetTriple(BlobStart, BlobLen); 1778 if (Listener->ReadTargetTriple(TargetTriple)) 1779 return IgnorePCH; 1780 } 1781 break; 1782 } 1783 1784 case IMPORTS: { 1785 // Load each of the imported PCH files. 1786 unsigned Idx = 0, N = Record.size(); 1787 while (Idx < N) { 1788 // Read information about the AST file. 1789 ModuleKind ImportedKind = (ModuleKind)Record[Idx++]; 1790 unsigned Length = Record[Idx++]; 1791 llvm::SmallString<128> ImportedFile(Record.begin() + Idx, 1792 Record.begin() + Idx + Length); 1793 Idx += Length; 1794 1795 // Load the AST file. 1796 switch(ReadASTCore(ImportedFile, ImportedKind, &F)) { 1797 case Failure: return Failure; 1798 // If we have to ignore the dependency, we'll have to ignore this too. 1799 case IgnorePCH: return IgnorePCH; 1800 case Success: break; 1801 } 1802 } 1803 break; 1804 } 1805 1806 case TYPE_OFFSET: { 1807 if (F.LocalNumTypes != 0) { 1808 Error("duplicate TYPE_OFFSET record in AST file"); 1809 return Failure; 1810 } 1811 F.TypeOffsets = (const uint32_t *)BlobStart; 1812 F.LocalNumTypes = Record[0]; 1813 unsigned LocalBaseTypeIndex = Record[1]; 1814 F.BaseTypeIndex = getTotalNumTypes(); 1815 1816 if (F.LocalNumTypes > 0) { 1817 // Introduce the global -> local mapping for types within this module. 1818 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); 1819 1820 // Introduce the local -> global mapping for types within this module. 1821 F.TypeRemap.insert(std::make_pair(LocalBaseTypeIndex, 1822 F.BaseTypeIndex - LocalBaseTypeIndex)); 1823 1824 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); 1825 } 1826 break; 1827 } 1828 1829 case DECL_OFFSET: { 1830 if (F.LocalNumDecls != 0) { 1831 Error("duplicate DECL_OFFSET record in AST file"); 1832 return Failure; 1833 } 1834 F.DeclOffsets = (const DeclOffset *)BlobStart; 1835 F.LocalNumDecls = Record[0]; 1836 unsigned LocalBaseDeclID = Record[1]; 1837 F.BaseDeclID = getTotalNumDecls(); 1838 1839 if (F.LocalNumDecls > 0) { 1840 // Introduce the global -> local mapping for declarations within this 1841 // module. 1842 GlobalDeclMap.insert( 1843 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F)); 1844 1845 // Introduce the local -> global mapping for declarations within this 1846 // module. 1847 F.DeclRemap.insert(std::make_pair(LocalBaseDeclID, 1848 F.BaseDeclID - LocalBaseDeclID)); 1849 1850 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); 1851 } 1852 break; 1853 } 1854 1855 case TU_UPDATE_LEXICAL: { 1856 DeclContext *TU = Context.getTranslationUnitDecl(); 1857 DeclContextInfo &Info = F.DeclContextInfos[TU]; 1858 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair *>(BlobStart); 1859 Info.NumLexicalDecls 1860 = static_cast<unsigned int>(BlobLen / sizeof(KindDeclIDPair)); 1861 TU->setHasExternalLexicalStorage(true); 1862 break; 1863 } 1864 1865 case UPDATE_VISIBLE: { 1866 unsigned Idx = 0; 1867 serialization::DeclID ID = ReadDeclID(F, Record, Idx); 1868 void *Table = ASTDeclContextNameLookupTable::Create( 1869 (const unsigned char *)BlobStart + Record[Idx++], 1870 (const unsigned char *)BlobStart, 1871 ASTDeclContextNameLookupTrait(*this, F)); 1872 if (ID == PREDEF_DECL_TRANSLATION_UNIT_ID) { // Is it the TU? 1873 DeclContext *TU = Context.getTranslationUnitDecl(); 1874 F.DeclContextInfos[TU].NameLookupTableData = Table; 1875 TU->setHasExternalVisibleStorage(true); 1876 } else 1877 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); 1878 break; 1879 } 1880 1881 case REDECLS_UPDATE_LATEST: { 1882 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 1883 for (unsigned i = 0, e = Record.size(); i < e; /* in loop */) { 1884 DeclID First = ReadDeclID(F, Record, i); 1885 DeclID Latest = ReadDeclID(F, Record, i); 1886 FirstLatestDeclIDs[First] = Latest; 1887 } 1888 break; 1889 } 1890 1891 case LANGUAGE_OPTIONS: 1892 if (ParseLanguageOptions(Record) && !DisableValidation) 1893 return IgnorePCH; 1894 break; 1895 1896 case IDENTIFIER_TABLE: 1897 F.IdentifierTableData = BlobStart; 1898 if (Record[0]) { 1899 F.IdentifierLookupTable 1900 = ASTIdentifierLookupTable::Create( 1901 (const unsigned char *)F.IdentifierTableData + Record[0], 1902 (const unsigned char *)F.IdentifierTableData, 1903 ASTIdentifierLookupTrait(*this, F)); 1904 1905 PP.getIdentifierTable().setExternalIdentifierLookup(this); 1906 } 1907 break; 1908 1909 case IDENTIFIER_OFFSET: { 1910 if (F.LocalNumIdentifiers != 0) { 1911 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 1912 return Failure; 1913 } 1914 F.IdentifierOffsets = (const uint32_t *)BlobStart; 1915 F.LocalNumIdentifiers = Record[0]; 1916 unsigned LocalBaseIdentifierID = Record[1]; 1917 F.BaseIdentifierID = getTotalNumIdentifiers(); 1918 1919 if (F.LocalNumIdentifiers > 0) { 1920 // Introduce the global -> local mapping for identifiers within this 1921 // module. 1922 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, 1923 &F)); 1924 1925 // Introduce the local -> global mapping for identifiers within this 1926 // module. 1927 F.IdentifierRemap.insert( 1928 std::make_pair(LocalBaseIdentifierID, 1929 F.BaseIdentifierID - LocalBaseIdentifierID)); 1930 1931 IdentifiersLoaded.resize(IdentifiersLoaded.size() 1932 + F.LocalNumIdentifiers); 1933 } 1934 break; 1935 } 1936 1937 case EXTERNAL_DEFINITIONS: 1938 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1939 ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); 1940 break; 1941 1942 case SPECIAL_TYPES: 1943 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1944 SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); 1945 break; 1946 1947 case STATISTICS: 1948 TotalNumStatements += Record[0]; 1949 TotalNumMacros += Record[1]; 1950 TotalLexicalDeclContexts += Record[2]; 1951 TotalVisibleDeclContexts += Record[3]; 1952 break; 1953 1954 case UNUSED_FILESCOPED_DECLS: 1955 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1956 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); 1957 break; 1958 1959 case DELEGATING_CTORS: 1960 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1961 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); 1962 break; 1963 1964 case WEAK_UNDECLARED_IDENTIFIERS: 1965 if (Record.size() % 4 != 0) { 1966 Error("invalid weak identifiers record"); 1967 return Failure; 1968 } 1969 1970 // FIXME: Ignore weak undeclared identifiers from non-original PCH 1971 // files. This isn't the way to do it :) 1972 WeakUndeclaredIdentifiers.clear(); 1973 1974 // Translate the weak, undeclared identifiers into global IDs. 1975 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { 1976 WeakUndeclaredIdentifiers.push_back( 1977 getGlobalIdentifierID(F, Record[I++])); 1978 WeakUndeclaredIdentifiers.push_back( 1979 getGlobalIdentifierID(F, Record[I++])); 1980 WeakUndeclaredIdentifiers.push_back( 1981 ReadSourceLocation(F, Record, I).getRawEncoding()); 1982 WeakUndeclaredIdentifiers.push_back(Record[I++]); 1983 } 1984 break; 1985 1986 case LOCALLY_SCOPED_EXTERNAL_DECLS: 1987 for (unsigned I = 0, N = Record.size(); I != N; ++I) 1988 LocallyScopedExternalDecls.push_back(getGlobalDeclID(F, Record[I])); 1989 break; 1990 1991 case SELECTOR_OFFSETS: { 1992 F.SelectorOffsets = (const uint32_t *)BlobStart; 1993 F.LocalNumSelectors = Record[0]; 1994 unsigned LocalBaseSelectorID = Record[1]; 1995 F.BaseSelectorID = getTotalNumSelectors(); 1996 1997 if (F.LocalNumSelectors > 0) { 1998 // Introduce the global -> local mapping for selectors within this 1999 // module. 2000 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); 2001 2002 // Introduce the local -> global mapping for selectors within this 2003 // module. 2004 F.SelectorRemap.insert(std::make_pair(LocalBaseSelectorID, 2005 F.BaseSelectorID - LocalBaseSelectorID)); 2006 2007 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); 2008 } 2009 break; 2010 } 2011 2012 case METHOD_POOL: 2013 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 2014 if (Record[0]) 2015 F.SelectorLookupTable 2016 = ASTSelectorLookupTable::Create( 2017 F.SelectorLookupTableData + Record[0], 2018 F.SelectorLookupTableData, 2019 ASTSelectorLookupTrait(*this, F)); 2020 TotalNumMethodPoolEntries += Record[1]; 2021 break; 2022 2023 case REFERENCED_SELECTOR_POOL: 2024 if (!Record.empty()) { 2025 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { 2026 ReferencedSelectorsData.push_back(getGlobalSelectorID(F, 2027 Record[Idx++])); 2028 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). 2029 getRawEncoding()); 2030 } 2031 } 2032 break; 2033 2034 case PP_COUNTER_VALUE: 2035 if (!Record.empty() && Listener) 2036 Listener->ReadCounter(Record[0]); 2037 break; 2038 2039 case FILE_SORTED_DECLS: 2040 F.FileSortedDecls = (const DeclID *)BlobStart; 2041 break; 2042 2043 case SOURCE_LOCATION_OFFSETS: { 2044 F.SLocEntryOffsets = (const uint32_t *)BlobStart; 2045 F.LocalNumSLocEntries = Record[0]; 2046 unsigned SLocSpaceSize = Record[1]; 2047 llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = 2048 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, 2049 SLocSpaceSize); 2050 // Make our entry in the range map. BaseID is negative and growing, so 2051 // we invert it. Because we invert it, though, we need the other end of 2052 // the range. 2053 unsigned RangeStart = 2054 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; 2055 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); 2056 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); 2057 2058 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing. 2059 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0); 2060 GlobalSLocOffsetMap.insert( 2061 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset 2062 - SLocSpaceSize,&F)); 2063 2064 // Initialize the remapping table. 2065 // Invalid stays invalid. 2066 F.SLocRemap.insert(std::make_pair(0U, 0)); 2067 // This module. Base was 2 when being compiled. 2068 F.SLocRemap.insert(std::make_pair(2U, 2069 static_cast<int>(F.SLocEntryBaseOffset - 2))); 2070 2071 TotalNumSLocEntries += F.LocalNumSLocEntries; 2072 break; 2073 } 2074 2075 case MODULE_OFFSET_MAP: { 2076 // Additional remapping information. 2077 const unsigned char *Data = (const unsigned char*)BlobStart; 2078 const unsigned char *DataEnd = Data + BlobLen; 2079 2080 // Continuous range maps we may be updating in our module. 2081 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); 2082 ContinuousRangeMap<uint32_t, int, 2>::Builder 2083 IdentifierRemap(F.IdentifierRemap); 2084 ContinuousRangeMap<uint32_t, int, 2>::Builder 2085 PreprocessedEntityRemap(F.PreprocessedEntityRemap); 2086 ContinuousRangeMap<uint32_t, int, 2>::Builder 2087 SubmoduleRemap(F.SubmoduleRemap); 2088 ContinuousRangeMap<uint32_t, int, 2>::Builder 2089 SelectorRemap(F.SelectorRemap); 2090 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); 2091 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); 2092 2093 while(Data < DataEnd) { 2094 uint16_t Len = io::ReadUnalignedLE16(Data); 2095 StringRef Name = StringRef((const char*)Data, Len); 2096 Data += Len; 2097 ModuleFile *OM = ModuleMgr.lookup(Name); 2098 if (!OM) { 2099 Error("SourceLocation remap refers to unknown module"); 2100 return Failure; 2101 } 2102 2103 uint32_t SLocOffset = io::ReadUnalignedLE32(Data); 2104 uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); 2105 uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); 2106 uint32_t SubmoduleIDOffset = io::ReadUnalignedLE32(Data); 2107 uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); 2108 uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); 2109 uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); 2110 2111 // Source location offset is mapped to OM->SLocEntryBaseOffset. 2112 SLocRemap.insert(std::make_pair(SLocOffset, 2113 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); 2114 IdentifierRemap.insert( 2115 std::make_pair(IdentifierIDOffset, 2116 OM->BaseIdentifierID - IdentifierIDOffset)); 2117 PreprocessedEntityRemap.insert( 2118 std::make_pair(PreprocessedEntityIDOffset, 2119 OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset)); 2120 SubmoduleRemap.insert(std::make_pair(SubmoduleIDOffset, 2121 OM->BaseSubmoduleID - SubmoduleIDOffset)); 2122 SelectorRemap.insert(std::make_pair(SelectorIDOffset, 2123 OM->BaseSelectorID - SelectorIDOffset)); 2124 DeclRemap.insert(std::make_pair(DeclIDOffset, 2125 OM->BaseDeclID - DeclIDOffset)); 2126 2127 TypeRemap.insert(std::make_pair(TypeIndexOffset, 2128 OM->BaseTypeIndex - TypeIndexOffset)); 2129 } 2130 break; 2131 } 2132 2133 case SOURCE_MANAGER_LINE_TABLE: 2134 if (ParseLineTable(F, Record)) 2135 return Failure; 2136 break; 2137 2138 case FILE_SOURCE_LOCATION_OFFSETS: 2139 F.SLocFileOffsets = (const uint32_t *)BlobStart; 2140 F.LocalNumSLocFileEntries = Record[0]; 2141 break; 2142 2143 case SOURCE_LOCATION_PRELOADS: { 2144 // Need to transform from the local view (1-based IDs) to the global view, 2145 // which is based off F.SLocEntryBaseID. 2146 if (!F.PreloadSLocEntries.empty()) { 2147 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file"); 2148 return Failure; 2149 } 2150 2151 F.PreloadSLocEntries.swap(Record); 2152 break; 2153 } 2154 2155 case STAT_CACHE: { 2156 if (!DisableStatCache) { 2157 ASTStatCache *MyStatCache = 2158 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2159 (const unsigned char *)BlobStart, 2160 NumStatHits, NumStatMisses); 2161 FileMgr.addStatCache(MyStatCache); 2162 F.StatCache = MyStatCache; 2163 } 2164 break; 2165 } 2166 2167 case EXT_VECTOR_DECLS: 2168 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2169 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); 2170 break; 2171 2172 case VTABLE_USES: 2173 if (Record.size() % 3 != 0) { 2174 Error("Invalid VTABLE_USES record"); 2175 return Failure; 2176 } 2177 2178 // Later tables overwrite earlier ones. 2179 // FIXME: Modules will have some trouble with this. This is clearly not 2180 // the right way to do this. 2181 VTableUses.clear(); 2182 2183 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { 2184 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); 2185 VTableUses.push_back( 2186 ReadSourceLocation(F, Record, Idx).getRawEncoding()); 2187 VTableUses.push_back(Record[Idx++]); 2188 } 2189 break; 2190 2191 case DYNAMIC_CLASSES: 2192 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2193 DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); 2194 break; 2195 2196 case PENDING_IMPLICIT_INSTANTIATIONS: 2197 if (PendingInstantiations.size() % 2 != 0) { 2198 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); 2199 return Failure; 2200 } 2201 2202 // Later lists of pending instantiations overwrite earlier ones. 2203 // FIXME: This is most certainly wrong for modules. 2204 PendingInstantiations.clear(); 2205 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { 2206 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); 2207 PendingInstantiations.push_back( 2208 ReadSourceLocation(F, Record, I).getRawEncoding()); 2209 } 2210 break; 2211 2212 case SEMA_DECL_REFS: 2213 // Later tables overwrite earlier ones. 2214 // FIXME: Modules will have some trouble with this. 2215 SemaDeclRefs.clear(); 2216 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2217 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2218 break; 2219 2220 case ORIGINAL_FILE_NAME: 2221 // The primary AST will be the last to get here, so it will be the one 2222 // that's used. 2223 ActualOriginalFileName.assign(BlobStart, BlobLen); 2224 OriginalFileName = ActualOriginalFileName; 2225 MaybeAddSystemRootToFilename(OriginalFileName); 2226 break; 2227 2228 case ORIGINAL_FILE_ID: 2229 OriginalFileID = FileID::get(Record[0]); 2230 break; 2231 2232 case ORIGINAL_PCH_DIR: 2233 // The primary AST will be the last to get here, so it will be the one 2234 // that's used. 2235 OriginalDir.assign(BlobStart, BlobLen); 2236 break; 2237 2238 case VERSION_CONTROL_BRANCH_REVISION: { 2239 const std::string &CurBranch = getClangFullRepositoryVersion(); 2240 StringRef ASTBranch(BlobStart, BlobLen); 2241 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2242 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2243 return IgnorePCH; 2244 } 2245 break; 2246 } 2247 2248 case PPD_ENTITIES_OFFSETS: { 2249 F.PreprocessedEntityOffsets = (const PPEntityOffset *)BlobStart; 2250 assert(BlobLen % sizeof(PPEntityOffset) == 0); 2251 F.NumPreprocessedEntities = BlobLen / sizeof(PPEntityOffset); 2252 2253 unsigned LocalBasePreprocessedEntityID = Record[0]; 2254 2255 unsigned StartingID; 2256 if (!PP.getPreprocessingRecord()) 2257 PP.createPreprocessingRecord(true); 2258 if (!PP.getPreprocessingRecord()->getExternalSource()) 2259 PP.getPreprocessingRecord()->SetExternalSource(*this); 2260 StartingID 2261 = PP.getPreprocessingRecord() 2262 ->allocateLoadedEntities(F.NumPreprocessedEntities); 2263 F.BasePreprocessedEntityID = StartingID; 2264 2265 if (F.NumPreprocessedEntities > 0) { 2266 // Introduce the global -> local mapping for preprocessed entities in 2267 // this module. 2268 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); 2269 2270 // Introduce the local -> global mapping for preprocessed entities in 2271 // this module. 2272 F.PreprocessedEntityRemap.insert( 2273 std::make_pair(LocalBasePreprocessedEntityID, 2274 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID)); 2275 } 2276 2277 break; 2278 } 2279 2280 case DECL_UPDATE_OFFSETS: { 2281 if (Record.size() % 2 != 0) { 2282 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2283 return Failure; 2284 } 2285 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2286 DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] 2287 .push_back(std::make_pair(&F, Record[I+1])); 2288 break; 2289 } 2290 2291 case DECL_REPLACEMENTS: { 2292 if (Record.size() % 3 != 0) { 2293 Error("invalid DECL_REPLACEMENTS block in AST file"); 2294 return Failure; 2295 } 2296 for (unsigned I = 0, N = Record.size(); I != N; I += 3) 2297 ReplacedDecls[getGlobalDeclID(F, Record[I])] 2298 = ReplacedDeclInfo(&F, Record[I+1], Record[I+2]); 2299 break; 2300 } 2301 2302 case OBJC_CHAINED_CATEGORIES: { 2303 if (Record.size() % 3 != 0) { 2304 Error("invalid OBJC_CHAINED_CATEGORIES block in AST file"); 2305 return Failure; 2306 } 2307 for (unsigned I = 0, N = Record.size(); I != N; I += 3) { 2308 serialization::GlobalDeclID GlobID = getGlobalDeclID(F, Record[I]); 2309 F.ChainedObjCCategories[GlobID] = std::make_pair(Record[I+1], 2310 Record[I+2]); 2311 ObjCChainedCategoriesInterfaces.insert(GlobID); 2312 } 2313 break; 2314 } 2315 2316 case CXX_BASE_SPECIFIER_OFFSETS: { 2317 if (F.LocalNumCXXBaseSpecifiers != 0) { 2318 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2319 return Failure; 2320 } 2321 2322 F.LocalNumCXXBaseSpecifiers = Record[0]; 2323 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2324 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; 2325 break; 2326 } 2327 2328 case DIAG_PRAGMA_MAPPINGS: 2329 if (Record.size() % 2 != 0) { 2330 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2331 return Failure; 2332 } 2333 2334 if (F.PragmaDiagMappings.empty()) 2335 F.PragmaDiagMappings.swap(Record); 2336 else 2337 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), 2338 Record.begin(), Record.end()); 2339 break; 2340 2341 case CUDA_SPECIAL_DECL_REFS: 2342 // Later tables overwrite earlier ones. 2343 // FIXME: Modules will have trouble with this. 2344 CUDASpecialDeclRefs.clear(); 2345 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2346 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2347 break; 2348 2349 case HEADER_SEARCH_TABLE: { 2350 F.HeaderFileInfoTableData = BlobStart; 2351 F.LocalNumHeaderFileInfos = Record[1]; 2352 F.HeaderFileFrameworkStrings = BlobStart + Record[2]; 2353 if (Record[0]) { 2354 F.HeaderFileInfoTable 2355 = HeaderFileInfoLookupTable::Create( 2356 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2357 (const unsigned char *)F.HeaderFileInfoTableData, 2358 HeaderFileInfoTrait(*this, F, 2359 &PP.getHeaderSearchInfo(), 2360 BlobStart + Record[2])); 2361 2362 PP.getHeaderSearchInfo().SetExternalSource(this); 2363 if (!PP.getHeaderSearchInfo().getExternalLookup()) 2364 PP.getHeaderSearchInfo().SetExternalLookup(this); 2365 } 2366 break; 2367 } 2368 2369 case FP_PRAGMA_OPTIONS: 2370 // Later tables overwrite earlier ones. 2371 FPPragmaOptions.swap(Record); 2372 break; 2373 2374 case OPENCL_EXTENSIONS: 2375 // Later tables overwrite earlier ones. 2376 OpenCLExtensions.swap(Record); 2377 break; 2378 2379 case TENTATIVE_DEFINITIONS: 2380 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2381 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2382 break; 2383 2384 case KNOWN_NAMESPACES: 2385 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2386 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); 2387 break; 2388 2389 case IMPORTED_MODULES: { 2390 if (F.Kind != MK_Module) { 2391 // If we aren't loading a module (which has its own exports), make 2392 // all of the imported modules visible. 2393 // FIXME: Deal with macros-only imports. 2394 for (unsigned I = 0, N = Record.size(); I != N; ++I) { 2395 if (unsigned GlobalID = getGlobalSubmoduleID(F, Record[I])) 2396 ImportedModules.push_back(GlobalID); 2397 } 2398 } 2399 break; 2400 2401 } 2402 } 2403 } 2404 Error("premature end of bitstream in AST file"); 2405 return Failure; 2406} 2407 2408ASTReader::ASTReadResult ASTReader::validateFileEntries(ModuleFile &M) { 2409 llvm::BitstreamCursor &SLocEntryCursor = M.SLocEntryCursor; 2410 2411 for (unsigned i = 0, e = M.LocalNumSLocFileEntries; i != e; ++i) { 2412 SLocEntryCursor.JumpToBit(M.SLocFileOffsets[i]); 2413 unsigned Code = SLocEntryCursor.ReadCode(); 2414 if (Code == llvm::bitc::END_BLOCK || 2415 Code == llvm::bitc::ENTER_SUBBLOCK || 2416 Code == llvm::bitc::DEFINE_ABBREV) { 2417 Error("incorrectly-formatted source location entry in AST file"); 2418 return Failure; 2419 } 2420 2421 RecordData Record; 2422 const char *BlobStart; 2423 unsigned BlobLen; 2424 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 2425 default: 2426 Error("incorrectly-formatted source location entry in AST file"); 2427 return Failure; 2428 2429 case SM_SLOC_FILE_ENTRY: { 2430 // If the buffer was overridden, the file need not exist. 2431 if (Record[6]) 2432 break; 2433 2434 StringRef Filename(BlobStart, BlobLen); 2435 const FileEntry *File = getFileEntry(Filename); 2436 2437 if (File == 0) { 2438 std::string ErrorStr = "could not find file '"; 2439 ErrorStr += Filename; 2440 ErrorStr += "' referenced by AST file"; 2441 Error(ErrorStr.c_str()); 2442 return IgnorePCH; 2443 } 2444 2445 if (Record.size() < 7) { 2446 Error("source location entry is incorrect"); 2447 return Failure; 2448 } 2449 2450 // The stat info from the FileEntry came from the cached stat 2451 // info of the PCH, so we cannot trust it. 2452 struct stat StatBuf; 2453 if (::stat(File->getName(), &StatBuf) != 0) { 2454 StatBuf.st_size = File->getSize(); 2455 StatBuf.st_mtime = File->getModificationTime(); 2456 } 2457 2458 if (((off_t)Record[4] != StatBuf.st_size 2459#if !defined(LLVM_ON_WIN32) 2460 // In our regression testing, the Windows file system seems to 2461 // have inconsistent modification times that sometimes 2462 // erroneously trigger this error-handling path. 2463 || (time_t)Record[5] != StatBuf.st_mtime 2464#endif 2465 )) { 2466 Error(diag::err_fe_pch_file_modified, Filename); 2467 return IgnorePCH; 2468 } 2469 2470 break; 2471 } 2472 } 2473 } 2474 2475 return Success; 2476} 2477 2478void ASTReader::makeNamesVisible(const HiddenNames &Names) { 2479 for (unsigned I = 0, N = Names.size(); I != N; ++I) { 2480 if (Decl *D = Names[I].dyn_cast<Decl *>()) 2481 D->ModulePrivate = false; 2482 else 2483 Names[I].get<IdentifierInfo *>()->setHasMacroDefinition(true); 2484 } 2485} 2486 2487void ASTReader::makeModuleVisible(Module *Mod, 2488 Module::NameVisibilityKind NameVisibility) { 2489 llvm::SmallPtrSet<Module *, 4> Visited; 2490 llvm::SmallVector<Module *, 4> Stack; 2491 Stack.push_back(Mod); 2492 while (!Stack.empty()) { 2493 Mod = Stack.back(); 2494 Stack.pop_back(); 2495 2496 if (NameVisibility <= Mod->NameVisibility) { 2497 // This module already has this level of visibility (or greater), so 2498 // there is nothing more to do. 2499 continue; 2500 } 2501 2502 // Update the module's name visibility. 2503 Mod->NameVisibility = NameVisibility; 2504 2505 // If we've already deserialized any names from this module, 2506 // mark them as visible. 2507 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod); 2508 if (Hidden != HiddenNamesMap.end()) { 2509 makeNamesVisible(Hidden->second); 2510 HiddenNamesMap.erase(Hidden); 2511 } 2512 2513 // Push any non-explicit submodules onto the stack to be marked as 2514 // visible. 2515 for (llvm::StringMap<Module *>::iterator Sub = Mod->SubModules.begin(), 2516 SubEnd = Mod->SubModules.end(); 2517 Sub != SubEnd; ++Sub) { 2518 if (!Sub->getValue()->IsExplicit && Visited.insert(Sub->getValue())) 2519 Stack.push_back(Sub->getValue()); 2520 } 2521 2522 // Push any exported modules onto the stack to be marked as visible. 2523 bool AnyWildcard = false; 2524 bool UnrestrictedWildcard = false; 2525 llvm::SmallVector<Module *, 4> WildcardRestrictions; 2526 for (unsigned I = 0, N = Mod->Exports.size(); I != N; ++I) { 2527 Module *Exported = Mod->Exports[I].getPointer(); 2528 if (!Mod->Exports[I].getInt()) { 2529 // Export a named module directly; no wildcards involved. 2530 if (Visited.insert(Exported)) 2531 Stack.push_back(Exported); 2532 2533 continue; 2534 } 2535 2536 // Wildcard export: export all of the imported modules that match 2537 // the given pattern. 2538 AnyWildcard = true; 2539 if (UnrestrictedWildcard) 2540 continue; 2541 2542 if (Module *Restriction = Mod->Exports[I].getPointer()) 2543 WildcardRestrictions.push_back(Restriction); 2544 else { 2545 WildcardRestrictions.clear(); 2546 UnrestrictedWildcard = true; 2547 } 2548 } 2549 2550 // If there were any wildcards, push any imported modules that were 2551 // re-exported by the wildcard restriction. 2552 if (!AnyWildcard) 2553 continue; 2554 2555 for (unsigned I = 0, N = Mod->Imports.size(); I != N; ++I) { 2556 Module *Imported = Mod->Imports[I]; 2557 if (Visited.count(Imported)) 2558 continue; 2559 2560 bool Acceptable = UnrestrictedWildcard; 2561 if (!Acceptable) { 2562 // Check whether this module meets one of the restrictions. 2563 for (unsigned R = 0, NR = WildcardRestrictions.size(); R != NR; ++R) { 2564 Module *Restriction = WildcardRestrictions[R]; 2565 if (Imported == Restriction || Imported->isSubModuleOf(Restriction)) { 2566 Acceptable = true; 2567 break; 2568 } 2569 } 2570 } 2571 2572 if (!Acceptable) 2573 continue; 2574 2575 Visited.insert(Imported); 2576 Stack.push_back(Imported); 2577 } 2578 } 2579} 2580 2581ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2582 ModuleKind Type) { 2583 switch(ReadASTCore(FileName, Type, /*ImportedBy=*/0)) { 2584 case Failure: return Failure; 2585 case IgnorePCH: return IgnorePCH; 2586 case Success: break; 2587 } 2588 2589 // Here comes stuff that we only do once the entire chain is loaded. 2590 2591 // Check the predefines buffers. 2592 if (!DisableValidation && Type == MK_PCH && 2593 // FIXME: CheckPredefinesBuffers also sets the SuggestedPredefines; 2594 // if DisableValidation is true, defines that were set on command-line 2595 // but not in the PCH file will not be added to SuggestedPredefines. 2596 CheckPredefinesBuffers()) 2597 return IgnorePCH; 2598 2599 // Mark all of the identifiers in the identifier table as being out of date, 2600 // so that various accessors know to check the loaded modules when the 2601 // identifier is used. 2602 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(), 2603 IdEnd = PP.getIdentifierTable().end(); 2604 Id != IdEnd; ++Id) 2605 Id->second->setOutOfDate(true); 2606 2607 // Resolve any unresolved module exports. 2608 for (unsigned I = 0, N = UnresolvedModuleImportExports.size(); I != N; ++I) { 2609 UnresolvedModuleImportExport &Unresolved = UnresolvedModuleImportExports[I]; 2610 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID); 2611 Module *ResolvedMod = getSubmodule(GlobalID); 2612 2613 if (Unresolved.IsImport) { 2614 if (ResolvedMod) 2615 Unresolved.Mod->Imports.push_back(ResolvedMod); 2616 continue; 2617 } 2618 2619 if (ResolvedMod || Unresolved.IsWildcard) 2620 Unresolved.Mod->Exports.push_back( 2621 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard)); 2622 } 2623 UnresolvedModuleImportExports.clear(); 2624 2625 InitializeContext(); 2626 2627 if (DeserializationListener) 2628 DeserializationListener->ReaderInitialized(this); 2629 2630 // If this AST file is a precompiled preamble, then set the preamble file ID 2631 // of the source manager to the file source file from which the preamble was 2632 // built. 2633 if (Type == MK_Preamble) { 2634 if (!OriginalFileID.isInvalid()) { 2635 OriginalFileID = FileID::get(ModuleMgr.getPrimaryModule().SLocEntryBaseID 2636 + OriginalFileID.getOpaqueValue() - 1); 2637 SourceMgr.setPreambleFileID(OriginalFileID); 2638 } 2639 } 2640 2641 return Success; 2642} 2643 2644ASTReader::ASTReadResult ASTReader::ReadASTCore(StringRef FileName, 2645 ModuleKind Type, 2646 ModuleFile *ImportedBy) { 2647 ModuleFile *M; 2648 bool NewModule; 2649 std::string ErrorStr; 2650 llvm::tie(M, NewModule) = ModuleMgr.addModule(FileName, Type, ImportedBy, 2651 ErrorStr); 2652 2653 if (!M) { 2654 // We couldn't load the module. 2655 std::string Msg = "Unable to load module \"" + FileName.str() + "\": " 2656 + ErrorStr; 2657 Error(Msg); 2658 return Failure; 2659 } 2660 2661 if (!NewModule) { 2662 // We've already loaded this module. 2663 return Success; 2664 } 2665 2666 // FIXME: This seems rather a hack. Should CurrentDir be part of the 2667 // module? 2668 if (FileName != "-") { 2669 CurrentDir = llvm::sys::path::parent_path(FileName); 2670 if (CurrentDir.empty()) CurrentDir = "."; 2671 } 2672 2673 ModuleFile &F = *M; 2674 llvm::BitstreamCursor &Stream = F.Stream; 2675 Stream.init(F.StreamFile); 2676 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2677 2678 // Sniff for the signature. 2679 if (Stream.Read(8) != 'C' || 2680 Stream.Read(8) != 'P' || 2681 Stream.Read(8) != 'C' || 2682 Stream.Read(8) != 'H') { 2683 Diag(diag::err_not_a_pch_file) << FileName; 2684 return Failure; 2685 } 2686 2687 while (!Stream.AtEndOfStream()) { 2688 unsigned Code = Stream.ReadCode(); 2689 2690 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2691 Error("invalid record at top-level of AST file"); 2692 return Failure; 2693 } 2694 2695 unsigned BlockID = Stream.ReadSubBlockID(); 2696 2697 // We only know the AST subblock ID. 2698 switch (BlockID) { 2699 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2700 if (Stream.ReadBlockInfoBlock()) { 2701 Error("malformed BlockInfoBlock in AST file"); 2702 return Failure; 2703 } 2704 break; 2705 case AST_BLOCK_ID: 2706 switch (ReadASTBlock(F)) { 2707 case Success: 2708 break; 2709 2710 case Failure: 2711 return Failure; 2712 2713 case IgnorePCH: 2714 // FIXME: We could consider reading through to the end of this 2715 // AST block, skipping subblocks, to see if there are other 2716 // AST blocks elsewhere. 2717 2718 // FIXME: We can't clear loaded slocentries anymore. 2719 //SourceMgr.ClearPreallocatedSLocEntries(); 2720 2721 // Remove the stat cache. 2722 if (F.StatCache) 2723 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2724 2725 return IgnorePCH; 2726 } 2727 break; 2728 default: 2729 if (Stream.SkipBlock()) { 2730 Error("malformed block record in AST file"); 2731 return Failure; 2732 } 2733 break; 2734 } 2735 } 2736 2737 // Once read, set the ModuleFile bit base offset and update the size in 2738 // bits of all files we've seen. 2739 F.GlobalBitOffset = TotalModulesSizeInBits; 2740 TotalModulesSizeInBits += F.SizeInBits; 2741 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); 2742 2743 // Make sure that the files this module was built against are still available. 2744 if (!DisableValidation) { 2745 switch(validateFileEntries(*M)) { 2746 case Failure: return Failure; 2747 case IgnorePCH: return IgnorePCH; 2748 case Success: break; 2749 } 2750 } 2751 2752 // Preload SLocEntries. 2753 for (unsigned I = 0, N = M->PreloadSLocEntries.size(); I != N; ++I) { 2754 int Index = int(M->PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID; 2755 // Load it through the SourceManager and don't call ReadSLocEntryRecord() 2756 // directly because the entry may have already been loaded in which case 2757 // calling ReadSLocEntryRecord() directly would trigger an assertion in 2758 // SourceManager. 2759 SourceMgr.getLoadedSLocEntryByID(Index); 2760 } 2761 2762 2763 return Success; 2764} 2765 2766void ASTReader::InitializeContext() { 2767 // If there's a listener, notify them that we "read" the translation unit. 2768 if (DeserializationListener) 2769 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID, 2770 Context.getTranslationUnitDecl()); 2771 2772 // Make sure we load the declaration update records for the translation unit, 2773 // if there are any. 2774 loadDeclUpdateRecords(PREDEF_DECL_TRANSLATION_UNIT_ID, 2775 Context.getTranslationUnitDecl()); 2776 2777 // FIXME: Find a better way to deal with collisions between these 2778 // built-in types. Right now, we just ignore the problem. 2779 2780 // Load the special types. 2781 if (SpecialTypes.size() > NumSpecialTypeIDs) { 2782 if (Context.getBuiltinVaListType().isNull()) { 2783 Context.setBuiltinVaListType( 2784 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2785 } 2786 2787 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) { 2788 if (Context.ObjCProtoType.isNull()) 2789 Context.ObjCProtoType = GetType(Proto); 2790 } 2791 2792 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) { 2793 if (!Context.CFConstantStringTypeDecl) 2794 Context.setCFConstantStringType(GetType(String)); 2795 } 2796 2797 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2798 QualType FileType = GetType(File); 2799 if (FileType.isNull()) { 2800 Error("FILE type is NULL"); 2801 return; 2802 } 2803 2804 if (!Context.FILEDecl) { 2805 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2806 Context.setFILEDecl(Typedef->getDecl()); 2807 else { 2808 const TagType *Tag = FileType->getAs<TagType>(); 2809 if (!Tag) { 2810 Error("Invalid FILE type in AST file"); 2811 return; 2812 } 2813 Context.setFILEDecl(Tag->getDecl()); 2814 } 2815 } 2816 } 2817 2818 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) { 2819 QualType Jmp_bufType = GetType(Jmp_buf); 2820 if (Jmp_bufType.isNull()) { 2821 Error("jmp_buf type is NULL"); 2822 return; 2823 } 2824 2825 if (!Context.jmp_bufDecl) { 2826 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 2827 Context.setjmp_bufDecl(Typedef->getDecl()); 2828 else { 2829 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 2830 if (!Tag) { 2831 Error("Invalid jmp_buf type in AST file"); 2832 return; 2833 } 2834 Context.setjmp_bufDecl(Tag->getDecl()); 2835 } 2836 } 2837 } 2838 2839 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) { 2840 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 2841 if (Sigjmp_bufType.isNull()) { 2842 Error("sigjmp_buf type is NULL"); 2843 return; 2844 } 2845 2846 if (!Context.sigjmp_bufDecl) { 2847 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 2848 Context.setsigjmp_bufDecl(Typedef->getDecl()); 2849 else { 2850 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 2851 assert(Tag && "Invalid sigjmp_buf type in AST file"); 2852 Context.setsigjmp_bufDecl(Tag->getDecl()); 2853 } 2854 } 2855 } 2856 2857 if (unsigned ObjCIdRedef 2858 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) { 2859 if (Context.ObjCIdRedefinitionType.isNull()) 2860 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef); 2861 } 2862 2863 if (unsigned ObjCClassRedef 2864 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) { 2865 if (Context.ObjCClassRedefinitionType.isNull()) 2866 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef); 2867 } 2868 2869 if (unsigned ObjCSelRedef 2870 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) { 2871 if (Context.ObjCSelRedefinitionType.isNull()) 2872 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef); 2873 } 2874 2875 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) { 2876 QualType Ucontext_tType = GetType(Ucontext_t); 2877 if (Ucontext_tType.isNull()) { 2878 Error("ucontext_t type is NULL"); 2879 return; 2880 } 2881 2882 if (!Context.ucontext_tDecl) { 2883 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>()) 2884 Context.setucontext_tDecl(Typedef->getDecl()); 2885 else { 2886 const TagType *Tag = Ucontext_tType->getAs<TagType>(); 2887 assert(Tag && "Invalid ucontext_t type in AST file"); 2888 Context.setucontext_tDecl(Tag->getDecl()); 2889 } 2890 } 2891 } 2892 } 2893 2894 ReadPragmaDiagnosticMappings(Context.getDiagnostics()); 2895 2896 // If there were any CUDA special declarations, deserialize them. 2897 if (!CUDASpecialDeclRefs.empty()) { 2898 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 2899 Context.setcudaConfigureCallDecl( 2900 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 2901 } 2902 2903 // Re-export any modules that were imported by a non-module AST file. 2904 for (unsigned I = 0, N = ImportedModules.size(); I != N; ++I) { 2905 if (Module *Imported = getSubmodule(ImportedModules[I])) 2906 makeModuleVisible(Imported, Module::AllVisible); 2907 } 2908 ImportedModules.clear(); 2909} 2910 2911void ASTReader::finalizeForWriting() { 2912 for (HiddenNamesMapType::iterator Hidden = HiddenNamesMap.begin(), 2913 HiddenEnd = HiddenNamesMap.end(); 2914 Hidden != HiddenEnd; ++Hidden) { 2915 makeNamesVisible(Hidden->second); 2916 } 2917 HiddenNamesMap.clear(); 2918} 2919 2920/// \brief Retrieve the name of the original source file name 2921/// directly from the AST file, without actually loading the AST 2922/// file. 2923std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 2924 FileManager &FileMgr, 2925 DiagnosticsEngine &Diags) { 2926 // Open the AST file. 2927 std::string ErrStr; 2928 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 2929 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 2930 if (!Buffer) { 2931 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 2932 return std::string(); 2933 } 2934 2935 // Initialize the stream 2936 llvm::BitstreamReader StreamFile; 2937 llvm::BitstreamCursor Stream; 2938 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 2939 (const unsigned char *)Buffer->getBufferEnd()); 2940 Stream.init(StreamFile); 2941 2942 // Sniff for the signature. 2943 if (Stream.Read(8) != 'C' || 2944 Stream.Read(8) != 'P' || 2945 Stream.Read(8) != 'C' || 2946 Stream.Read(8) != 'H') { 2947 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 2948 return std::string(); 2949 } 2950 2951 RecordData Record; 2952 while (!Stream.AtEndOfStream()) { 2953 unsigned Code = Stream.ReadCode(); 2954 2955 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 2956 unsigned BlockID = Stream.ReadSubBlockID(); 2957 2958 // We only know the AST subblock ID. 2959 switch (BlockID) { 2960 case AST_BLOCK_ID: 2961 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 2962 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2963 return std::string(); 2964 } 2965 break; 2966 2967 default: 2968 if (Stream.SkipBlock()) { 2969 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2970 return std::string(); 2971 } 2972 break; 2973 } 2974 continue; 2975 } 2976 2977 if (Code == llvm::bitc::END_BLOCK) { 2978 if (Stream.ReadBlockEnd()) { 2979 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 2980 return std::string(); 2981 } 2982 continue; 2983 } 2984 2985 if (Code == llvm::bitc::DEFINE_ABBREV) { 2986 Stream.ReadAbbrevRecord(); 2987 continue; 2988 } 2989 2990 Record.clear(); 2991 const char *BlobStart = 0; 2992 unsigned BlobLen = 0; 2993 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 2994 == ORIGINAL_FILE_NAME) 2995 return std::string(BlobStart, BlobLen); 2996 } 2997 2998 return std::string(); 2999} 3000 3001ASTReader::ASTReadResult ASTReader::ReadSubmoduleBlock(ModuleFile &F) { 3002 // Enter the submodule block. 3003 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) { 3004 Error("malformed submodule block record in AST file"); 3005 return Failure; 3006 } 3007 3008 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap(); 3009 bool First = true; 3010 Module *CurrentModule = 0; 3011 RecordData Record; 3012 SubmoduleID CurrentModuleGlobalIndex = 0; 3013 while (true) { 3014 unsigned Code = F.Stream.ReadCode(); 3015 if (Code == llvm::bitc::END_BLOCK) { 3016 if (F.Stream.ReadBlockEnd()) { 3017 Error("error at end of submodule block in AST file"); 3018 return Failure; 3019 } 3020 return Success; 3021 } 3022 3023 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 3024 // No known subblocks, always skip them. 3025 F.Stream.ReadSubBlockID(); 3026 if (F.Stream.SkipBlock()) { 3027 Error("malformed block record in AST file"); 3028 return Failure; 3029 } 3030 continue; 3031 } 3032 3033 if (Code == llvm::bitc::DEFINE_ABBREV) { 3034 F.Stream.ReadAbbrevRecord(); 3035 continue; 3036 } 3037 3038 // Read a record. 3039 const char *BlobStart; 3040 unsigned BlobLen; 3041 Record.clear(); 3042 switch (F.Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 3043 default: // Default behavior: ignore. 3044 break; 3045 3046 case SUBMODULE_DEFINITION: { 3047 if (First) { 3048 Error("missing submodule metadata record at beginning of block"); 3049 return Failure; 3050 } 3051 3052 if (Record.size() < 6) { 3053 Error("malformed module definition"); 3054 return Failure; 3055 } 3056 3057 StringRef Name(BlobStart, BlobLen); 3058 unsigned Parent = getGlobalSubmoduleID(F, Record[0]); 3059 bool IsFramework = Record[1]; 3060 bool IsExplicit = Record[2]; 3061 bool InferSubmodules = Record[3]; 3062 bool InferExplicitSubmodules = Record[4]; 3063 bool InferExportWildcard = Record[5]; 3064 3065 Module *ParentModule = 0; 3066 if (Parent) 3067 ParentModule = getSubmodule(Parent); 3068 3069 // Retrieve this (sub)module from the module map, creating it if 3070 // necessary. 3071 CurrentModule = ModMap.findOrCreateModule(Name, ParentModule, 3072 IsFramework, 3073 IsExplicit).first; 3074 3075 if (CurrentModuleGlobalIndex >= SubmodulesLoaded.size() || 3076 SubmodulesLoaded[CurrentModuleGlobalIndex]) { 3077 Error("too many submodules"); 3078 return Failure; 3079 } 3080 3081 CurrentModule->InferSubmodules = InferSubmodules; 3082 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules; 3083 CurrentModule->InferExportWildcard = InferExportWildcard; 3084 if (DeserializationListener) 3085 DeserializationListener->ModuleRead( 3086 CurrentModuleGlobalIndex + NUM_PREDEF_SUBMODULE_IDS, 3087 CurrentModule); 3088 3089 SubmodulesLoaded[CurrentModuleGlobalIndex++] = CurrentModule; 3090 break; 3091 } 3092 3093 case SUBMODULE_UMBRELLA: { 3094 if (First) { 3095 Error("missing submodule metadata record at beginning of block"); 3096 return Failure; 3097 } 3098 3099 if (!CurrentModule) 3100 break; 3101 3102 StringRef FileName(BlobStart, BlobLen); 3103 if (const FileEntry *Umbrella = PP.getFileManager().getFile(FileName)) { 3104 if (!CurrentModule->UmbrellaHeader) 3105 CurrentModule->UmbrellaHeader = Umbrella; 3106 else if (CurrentModule->UmbrellaHeader != Umbrella) { 3107 Error("mismatched umbrella headers in submodule"); 3108 return Failure; 3109 } 3110 } 3111 break; 3112 } 3113 3114 case SUBMODULE_HEADER: { 3115 if (First) { 3116 Error("missing submodule metadata record at beginning of block"); 3117 return Failure; 3118 } 3119 3120 if (!CurrentModule) 3121 break; 3122 3123 // FIXME: Be more lazy about this! 3124 StringRef FileName(BlobStart, BlobLen); 3125 if (const FileEntry *File = PP.getFileManager().getFile(FileName)) { 3126 if (std::find(CurrentModule->Headers.begin(), 3127 CurrentModule->Headers.end(), 3128 File) == CurrentModule->Headers.end()) 3129 CurrentModule->Headers.push_back(File); 3130 } 3131 break; 3132 } 3133 3134 case SUBMODULE_METADATA: { 3135 if (!First) { 3136 Error("submodule metadata record not at beginning of block"); 3137 return Failure; 3138 } 3139 First = false; 3140 3141 F.BaseSubmoduleID = getTotalNumSubmodules(); 3142 CurrentModuleGlobalIndex = F.BaseSubmoduleID; 3143 F.LocalNumSubmodules = Record[0]; 3144 unsigned LocalBaseSubmoduleID = Record[1]; 3145 if (F.LocalNumSubmodules > 0) { 3146 // Introduce the global -> local mapping for submodules within this 3147 // module. 3148 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F)); 3149 3150 // Introduce the local -> global mapping for submodules within this 3151 // module. 3152 F.SubmoduleRemap.insert( 3153 std::make_pair(LocalBaseSubmoduleID, 3154 F.BaseSubmoduleID - LocalBaseSubmoduleID)); 3155 3156 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules); 3157 } 3158 break; 3159 } 3160 3161 case SUBMODULE_IMPORTS: { 3162 if (First) { 3163 Error("missing submodule metadata record at beginning of block"); 3164 return Failure; 3165 } 3166 3167 if (!CurrentModule) 3168 break; 3169 3170 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) { 3171 UnresolvedModuleImportExport Unresolved; 3172 Unresolved.File = &F; 3173 Unresolved.Mod = CurrentModule; 3174 Unresolved.ID = Record[Idx]; 3175 Unresolved.IsImport = true; 3176 Unresolved.IsWildcard = false; 3177 UnresolvedModuleImportExports.push_back(Unresolved); 3178 } 3179 break; 3180 } 3181 3182 case SUBMODULE_EXPORTS: { 3183 if (First) { 3184 Error("missing submodule metadata record at beginning of block"); 3185 return Failure; 3186 } 3187 3188 if (!CurrentModule) 3189 break; 3190 3191 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) { 3192 UnresolvedModuleImportExport Unresolved; 3193 Unresolved.File = &F; 3194 Unresolved.Mod = CurrentModule; 3195 Unresolved.ID = Record[Idx]; 3196 Unresolved.IsImport = false; 3197 Unresolved.IsWildcard = Record[Idx + 1]; 3198 UnresolvedModuleImportExports.push_back(Unresolved); 3199 } 3200 3201 // Once we've loaded the set of exports, there's no reason to keep 3202 // the parsed, unresolved exports around. 3203 CurrentModule->UnresolvedExports.clear(); 3204 break; 3205 } 3206 } 3207 } 3208 3209 return Success; 3210} 3211 3212/// \brief Parse the record that corresponds to a LangOptions data 3213/// structure. 3214/// 3215/// This routine parses the language options from the AST file and then gives 3216/// them to the AST listener if one is set. 3217/// 3218/// \returns true if the listener deems the file unacceptable, false otherwise. 3219bool ASTReader::ParseLanguageOptions( 3220 const SmallVectorImpl<uint64_t> &Record) { 3221 if (Listener) { 3222 LangOptions LangOpts; 3223 unsigned Idx = 0; 3224#define LANGOPT(Name, Bits, Default, Description) \ 3225 LangOpts.Name = Record[Idx++]; 3226#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ 3227 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++])); 3228#include "clang/Basic/LangOptions.def" 3229 3230 unsigned Length = Record[Idx++]; 3231 LangOpts.CurrentModule.assign(Record.begin() + Idx, 3232 Record.begin() + Idx + Length); 3233 Idx += Length; 3234 return Listener->ReadLanguageOptions(LangOpts); 3235 } 3236 3237 return false; 3238} 3239 3240std::pair<ModuleFile *, unsigned> 3241ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) { 3242 GlobalPreprocessedEntityMapType::iterator 3243 I = GlobalPreprocessedEntityMap.find(GlobalIndex); 3244 assert(I != GlobalPreprocessedEntityMap.end() && 3245 "Corrupted global preprocessed entity map"); 3246 ModuleFile *M = I->second; 3247 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID; 3248 return std::make_pair(M, LocalIndex); 3249} 3250 3251PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) { 3252 PreprocessedEntityID PPID = Index+1; 3253 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index); 3254 ModuleFile &M = *PPInfo.first; 3255 unsigned LocalIndex = PPInfo.second; 3256 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex]; 3257 3258 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); 3259 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset); 3260 3261 unsigned Code = M.PreprocessorDetailCursor.ReadCode(); 3262 switch (Code) { 3263 case llvm::bitc::END_BLOCK: 3264 return 0; 3265 3266 case llvm::bitc::ENTER_SUBBLOCK: 3267 Error("unexpected subblock record in preprocessor detail block"); 3268 return 0; 3269 3270 case llvm::bitc::DEFINE_ABBREV: 3271 Error("unexpected abbrevation record in preprocessor detail block"); 3272 return 0; 3273 3274 default: 3275 break; 3276 } 3277 3278 if (!PP.getPreprocessingRecord()) { 3279 Error("no preprocessing record"); 3280 return 0; 3281 } 3282 3283 // Read the record. 3284 SourceRange Range(ReadSourceLocation(M, PPOffs.Begin), 3285 ReadSourceLocation(M, PPOffs.End)); 3286 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); 3287 const char *BlobStart = 0; 3288 unsigned BlobLen = 0; 3289 RecordData Record; 3290 PreprocessorDetailRecordTypes RecType = 3291 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.ReadRecord( 3292 Code, Record, BlobStart, BlobLen); 3293 switch (RecType) { 3294 case PPD_MACRO_EXPANSION: { 3295 bool isBuiltin = Record[0]; 3296 IdentifierInfo *Name = 0; 3297 MacroDefinition *Def = 0; 3298 if (isBuiltin) 3299 Name = getLocalIdentifier(M, Record[1]); 3300 else { 3301 PreprocessedEntityID 3302 GlobalID = getGlobalPreprocessedEntityID(M, Record[1]); 3303 Def =cast<MacroDefinition>(PPRec.getLoadedPreprocessedEntity(GlobalID-1)); 3304 } 3305 3306 MacroExpansion *ME; 3307 if (isBuiltin) 3308 ME = new (PPRec) MacroExpansion(Name, Range); 3309 else 3310 ME = new (PPRec) MacroExpansion(Def, Range); 3311 3312 return ME; 3313 } 3314 3315 case PPD_MACRO_DEFINITION: { 3316 // Decode the identifier info and then check again; if the macro is 3317 // still defined and associated with the identifier, 3318 IdentifierInfo *II = getLocalIdentifier(M, Record[0]); 3319 MacroDefinition *MD 3320 = new (PPRec) MacroDefinition(II, Range); 3321 3322 if (DeserializationListener) 3323 DeserializationListener->MacroDefinitionRead(PPID, MD); 3324 3325 return MD; 3326 } 3327 3328 case PPD_INCLUSION_DIRECTIVE: { 3329 const char *FullFileNameStart = BlobStart + Record[0]; 3330 const FileEntry *File 3331 = PP.getFileManager().getFile(StringRef(FullFileNameStart, 3332 BlobLen - Record[0])); 3333 3334 // FIXME: Stable encoding 3335 InclusionDirective::InclusionKind Kind 3336 = static_cast<InclusionDirective::InclusionKind>(Record[2]); 3337 InclusionDirective *ID 3338 = new (PPRec) InclusionDirective(PPRec, Kind, 3339 StringRef(BlobStart, Record[0]), 3340 Record[1], 3341 File, 3342 Range); 3343 return ID; 3344 } 3345 } 3346 3347 Error("invalid offset in preprocessor detail block"); 3348 return 0; 3349} 3350 3351/// \brief \arg SLocMapI points at a chunk of a module that contains no 3352/// preprocessed entities or the entities it contains are not the ones we are 3353/// looking for. Find the next module that contains entities and return the ID 3354/// of the first entry. 3355PreprocessedEntityID ASTReader::findNextPreprocessedEntity( 3356 GlobalSLocOffsetMapType::const_iterator SLocMapI) const { 3357 ++SLocMapI; 3358 for (GlobalSLocOffsetMapType::const_iterator 3359 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) { 3360 ModuleFile &M = *SLocMapI->second; 3361 if (M.NumPreprocessedEntities) 3362 return getGlobalPreprocessedEntityID(M, M.BasePreprocessedEntityID); 3363 } 3364 3365 return getTotalNumPreprocessedEntities(); 3366} 3367 3368namespace { 3369 3370template <unsigned PPEntityOffset::*PPLoc> 3371struct PPEntityComp { 3372 const ASTReader &Reader; 3373 ModuleFile &M; 3374 3375 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) { } 3376 3377 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const { 3378 SourceLocation LHS = getLoc(L); 3379 SourceLocation RHS = getLoc(R); 3380 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 3381 } 3382 3383 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const { 3384 SourceLocation LHS = getLoc(L); 3385 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 3386 } 3387 3388 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const { 3389 SourceLocation RHS = getLoc(R); 3390 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 3391 } 3392 3393 SourceLocation getLoc(const PPEntityOffset &PPE) const { 3394 return Reader.ReadSourceLocation(M, PPE.*PPLoc); 3395 } 3396}; 3397 3398} 3399 3400/// \brief Returns the first preprocessed entity ID that ends after \arg BLoc. 3401PreprocessedEntityID 3402ASTReader::findBeginPreprocessedEntity(SourceLocation BLoc) const { 3403 if (SourceMgr.isLocalSourceLocation(BLoc)) 3404 return getTotalNumPreprocessedEntities(); 3405 3406 GlobalSLocOffsetMapType::const_iterator 3407 SLocMapI = GlobalSLocOffsetMap.find(SourceManager::MaxLoadedOffset - 3408 BLoc.getOffset()); 3409 assert(SLocMapI != GlobalSLocOffsetMap.end() && 3410 "Corrupted global sloc offset map"); 3411 3412 if (SLocMapI->second->NumPreprocessedEntities == 0) 3413 return findNextPreprocessedEntity(SLocMapI); 3414 3415 ModuleFile &M = *SLocMapI->second; 3416 typedef const PPEntityOffset *pp_iterator; 3417 pp_iterator pp_begin = M.PreprocessedEntityOffsets; 3418 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities; 3419 3420 size_t Count = M.NumPreprocessedEntities; 3421 size_t Half; 3422 pp_iterator First = pp_begin; 3423 pp_iterator PPI; 3424 3425 // Do a binary search manually instead of using std::lower_bound because 3426 // The end locations of entities may be unordered (when a macro expansion 3427 // is inside another macro argument), but for this case it is not important 3428 // whether we get the first macro expansion or its containing macro. 3429 while (Count > 0) { 3430 Half = Count/2; 3431 PPI = First; 3432 std::advance(PPI, Half); 3433 if (SourceMgr.isBeforeInTranslationUnit(ReadSourceLocation(M, PPI->End), 3434 BLoc)){ 3435 First = PPI; 3436 ++First; 3437 Count = Count - Half - 1; 3438 } else 3439 Count = Half; 3440 } 3441 3442 if (PPI == pp_end) 3443 return findNextPreprocessedEntity(SLocMapI); 3444 3445 return getGlobalPreprocessedEntityID(M, 3446 M.BasePreprocessedEntityID + (PPI - pp_begin)); 3447} 3448 3449/// \brief Returns the first preprocessed entity ID that begins after \arg ELoc. 3450PreprocessedEntityID 3451ASTReader::findEndPreprocessedEntity(SourceLocation ELoc) const { 3452 if (SourceMgr.isLocalSourceLocation(ELoc)) 3453 return getTotalNumPreprocessedEntities(); 3454 3455 GlobalSLocOffsetMapType::const_iterator 3456 SLocMapI = GlobalSLocOffsetMap.find(SourceManager::MaxLoadedOffset - 3457 ELoc.getOffset()); 3458 assert(SLocMapI != GlobalSLocOffsetMap.end() && 3459 "Corrupted global sloc offset map"); 3460 3461 if (SLocMapI->second->NumPreprocessedEntities == 0) 3462 return findNextPreprocessedEntity(SLocMapI); 3463 3464 ModuleFile &M = *SLocMapI->second; 3465 typedef const PPEntityOffset *pp_iterator; 3466 pp_iterator pp_begin = M.PreprocessedEntityOffsets; 3467 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities; 3468 pp_iterator PPI = 3469 std::upper_bound(pp_begin, pp_end, ELoc, 3470 PPEntityComp<&PPEntityOffset::Begin>(*this, M)); 3471 3472 if (PPI == pp_end) 3473 return findNextPreprocessedEntity(SLocMapI); 3474 3475 return getGlobalPreprocessedEntityID(M, 3476 M.BasePreprocessedEntityID + (PPI - pp_begin)); 3477} 3478 3479/// \brief Returns a pair of [Begin, End) indices of preallocated 3480/// preprocessed entities that \arg Range encompasses. 3481std::pair<unsigned, unsigned> 3482 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) { 3483 if (Range.isInvalid()) 3484 return std::make_pair(0,0); 3485 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())); 3486 3487 PreprocessedEntityID BeginID = findBeginPreprocessedEntity(Range.getBegin()); 3488 PreprocessedEntityID EndID = findEndPreprocessedEntity(Range.getEnd()); 3489 return std::make_pair(BeginID, EndID); 3490} 3491 3492/// \brief Optionally returns true or false if the preallocated preprocessed 3493/// entity with index \arg Index came from file \arg FID. 3494llvm::Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index, 3495 FileID FID) { 3496 if (FID.isInvalid()) 3497 return false; 3498 3499 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index); 3500 ModuleFile &M = *PPInfo.first; 3501 unsigned LocalIndex = PPInfo.second; 3502 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex]; 3503 3504 SourceLocation Loc = ReadSourceLocation(M, PPOffs.Begin); 3505 if (Loc.isInvalid()) 3506 return false; 3507 3508 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID)) 3509 return true; 3510 else 3511 return false; 3512} 3513 3514namespace { 3515 /// \brief Visitor used to search for information about a header file. 3516 class HeaderFileInfoVisitor { 3517 ASTReader &Reader; 3518 const FileEntry *FE; 3519 3520 llvm::Optional<HeaderFileInfo> HFI; 3521 3522 public: 3523 HeaderFileInfoVisitor(ASTReader &Reader, const FileEntry *FE) 3524 : Reader(Reader), FE(FE) { } 3525 3526 static bool visit(ModuleFile &M, void *UserData) { 3527 HeaderFileInfoVisitor *This 3528 = static_cast<HeaderFileInfoVisitor *>(UserData); 3529 3530 HeaderFileInfoTrait Trait(This->Reader, M, 3531 &This->Reader.getPreprocessor().getHeaderSearchInfo(), 3532 M.HeaderFileFrameworkStrings, 3533 This->FE->getName()); 3534 3535 HeaderFileInfoLookupTable *Table 3536 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable); 3537 if (!Table) 3538 return false; 3539 3540 // Look in the on-disk hash table for an entry for this file name. 3541 HeaderFileInfoLookupTable::iterator Pos = Table->find(This->FE->getName(), 3542 &Trait); 3543 if (Pos == Table->end()) 3544 return false; 3545 3546 This->HFI = *Pos; 3547 return true; 3548 } 3549 3550 llvm::Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; } 3551 }; 3552} 3553 3554HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 3555 HeaderFileInfoVisitor Visitor(*this, FE); 3556 ModuleMgr.visit(&HeaderFileInfoVisitor::visit, &Visitor); 3557 if (llvm::Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo()) { 3558 if (Listener) 3559 Listener->ReadHeaderFileInfo(*HFI, FE->getUID()); 3560 return *HFI; 3561 } 3562 3563 return HeaderFileInfo(); 3564} 3565 3566void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) { 3567 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3568 ModuleFile &F = *(*I); 3569 unsigned Idx = 0; 3570 while (Idx < F.PragmaDiagMappings.size()) { 3571 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); 3572 Diag.DiagStates.push_back(*Diag.GetCurDiagState()); 3573 Diag.DiagStatePoints.push_back( 3574 DiagnosticsEngine::DiagStatePoint(&Diag.DiagStates.back(), 3575 FullSourceLoc(Loc, SourceMgr))); 3576 while (1) { 3577 assert(Idx < F.PragmaDiagMappings.size() && 3578 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 3579 if (Idx >= F.PragmaDiagMappings.size()) { 3580 break; // Something is messed up but at least avoid infinite loop in 3581 // release build. 3582 } 3583 unsigned DiagID = F.PragmaDiagMappings[Idx++]; 3584 if (DiagID == (unsigned)-1) { 3585 break; // no more diag/map pairs for this location. 3586 } 3587 diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; 3588 DiagnosticMappingInfo MappingInfo = Diag.makeMappingInfo(Map, Loc); 3589 Diag.GetCurDiagState()->setMappingInfo(DiagID, MappingInfo); 3590 } 3591 } 3592 } 3593} 3594 3595/// \brief Get the correct cursor and offset for loading a type. 3596ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 3597 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); 3598 assert(I != GlobalTypeMap.end() && "Corrupted global type map"); 3599 ModuleFile *M = I->second; 3600 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); 3601} 3602 3603/// \brief Read and return the type with the given index.. 3604/// 3605/// The index is the type ID, shifted and minus the number of predefs. This 3606/// routine actually reads the record corresponding to the type at the given 3607/// location. It is a helper routine for GetType, which deals with reading type 3608/// IDs. 3609QualType ASTReader::readTypeRecord(unsigned Index) { 3610 RecordLocation Loc = TypeCursorForIndex(Index); 3611 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 3612 3613 // Keep track of where we are in the stream, then jump back there 3614 // after reading this type. 3615 SavedStreamPosition SavedPosition(DeclsCursor); 3616 3617 ReadingKindTracker ReadingKind(Read_Type, *this); 3618 3619 // Note that we are loading a type record. 3620 Deserializing AType(this); 3621 3622 unsigned Idx = 0; 3623 DeclsCursor.JumpToBit(Loc.Offset); 3624 RecordData Record; 3625 unsigned Code = DeclsCursor.ReadCode(); 3626 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 3627 case TYPE_EXT_QUAL: { 3628 if (Record.size() != 2) { 3629 Error("Incorrect encoding of extended qualifier type"); 3630 return QualType(); 3631 } 3632 QualType Base = readType(*Loc.F, Record, Idx); 3633 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); 3634 return Context.getQualifiedType(Base, Quals); 3635 } 3636 3637 case TYPE_COMPLEX: { 3638 if (Record.size() != 1) { 3639 Error("Incorrect encoding of complex type"); 3640 return QualType(); 3641 } 3642 QualType ElemType = readType(*Loc.F, Record, Idx); 3643 return Context.getComplexType(ElemType); 3644 } 3645 3646 case TYPE_POINTER: { 3647 if (Record.size() != 1) { 3648 Error("Incorrect encoding of pointer type"); 3649 return QualType(); 3650 } 3651 QualType PointeeType = readType(*Loc.F, Record, Idx); 3652 return Context.getPointerType(PointeeType); 3653 } 3654 3655 case TYPE_BLOCK_POINTER: { 3656 if (Record.size() != 1) { 3657 Error("Incorrect encoding of block pointer type"); 3658 return QualType(); 3659 } 3660 QualType PointeeType = readType(*Loc.F, Record, Idx); 3661 return Context.getBlockPointerType(PointeeType); 3662 } 3663 3664 case TYPE_LVALUE_REFERENCE: { 3665 if (Record.size() != 2) { 3666 Error("Incorrect encoding of lvalue reference type"); 3667 return QualType(); 3668 } 3669 QualType PointeeType = readType(*Loc.F, Record, Idx); 3670 return Context.getLValueReferenceType(PointeeType, Record[1]); 3671 } 3672 3673 case TYPE_RVALUE_REFERENCE: { 3674 if (Record.size() != 1) { 3675 Error("Incorrect encoding of rvalue reference type"); 3676 return QualType(); 3677 } 3678 QualType PointeeType = readType(*Loc.F, Record, Idx); 3679 return Context.getRValueReferenceType(PointeeType); 3680 } 3681 3682 case TYPE_MEMBER_POINTER: { 3683 if (Record.size() != 2) { 3684 Error("Incorrect encoding of member pointer type"); 3685 return QualType(); 3686 } 3687 QualType PointeeType = readType(*Loc.F, Record, Idx); 3688 QualType ClassType = readType(*Loc.F, Record, Idx); 3689 if (PointeeType.isNull() || ClassType.isNull()) 3690 return QualType(); 3691 3692 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3693 } 3694 3695 case TYPE_CONSTANT_ARRAY: { 3696 QualType ElementType = readType(*Loc.F, Record, Idx); 3697 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3698 unsigned IndexTypeQuals = Record[2]; 3699 unsigned Idx = 3; 3700 llvm::APInt Size = ReadAPInt(Record, Idx); 3701 return Context.getConstantArrayType(ElementType, Size, 3702 ASM, IndexTypeQuals); 3703 } 3704 3705 case TYPE_INCOMPLETE_ARRAY: { 3706 QualType ElementType = readType(*Loc.F, Record, Idx); 3707 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3708 unsigned IndexTypeQuals = Record[2]; 3709 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3710 } 3711 3712 case TYPE_VARIABLE_ARRAY: { 3713 QualType ElementType = readType(*Loc.F, Record, Idx); 3714 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3715 unsigned IndexTypeQuals = Record[2]; 3716 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3717 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3718 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3719 ASM, IndexTypeQuals, 3720 SourceRange(LBLoc, RBLoc)); 3721 } 3722 3723 case TYPE_VECTOR: { 3724 if (Record.size() != 3) { 3725 Error("incorrect encoding of vector type in AST file"); 3726 return QualType(); 3727 } 3728 3729 QualType ElementType = readType(*Loc.F, Record, Idx); 3730 unsigned NumElements = Record[1]; 3731 unsigned VecKind = Record[2]; 3732 return Context.getVectorType(ElementType, NumElements, 3733 (VectorType::VectorKind)VecKind); 3734 } 3735 3736 case TYPE_EXT_VECTOR: { 3737 if (Record.size() != 3) { 3738 Error("incorrect encoding of extended vector type in AST file"); 3739 return QualType(); 3740 } 3741 3742 QualType ElementType = readType(*Loc.F, Record, Idx); 3743 unsigned NumElements = Record[1]; 3744 return Context.getExtVectorType(ElementType, NumElements); 3745 } 3746 3747 case TYPE_FUNCTION_NO_PROTO: { 3748 if (Record.size() != 6) { 3749 Error("incorrect encoding of no-proto function type"); 3750 return QualType(); 3751 } 3752 QualType ResultType = readType(*Loc.F, Record, Idx); 3753 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], 3754 (CallingConv)Record[4], Record[5]); 3755 return Context.getFunctionNoProtoType(ResultType, Info); 3756 } 3757 3758 case TYPE_FUNCTION_PROTO: { 3759 QualType ResultType = readType(*Loc.F, Record, Idx); 3760 3761 FunctionProtoType::ExtProtoInfo EPI; 3762 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3763 /*hasregparm*/ Record[2], 3764 /*regparm*/ Record[3], 3765 static_cast<CallingConv>(Record[4]), 3766 /*produces*/ Record[5]); 3767 3768 unsigned Idx = 6; 3769 unsigned NumParams = Record[Idx++]; 3770 SmallVector<QualType, 16> ParamTypes; 3771 for (unsigned I = 0; I != NumParams; ++I) 3772 ParamTypes.push_back(readType(*Loc.F, Record, Idx)); 3773 3774 EPI.Variadic = Record[Idx++]; 3775 EPI.TypeQuals = Record[Idx++]; 3776 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3777 ExceptionSpecificationType EST = 3778 static_cast<ExceptionSpecificationType>(Record[Idx++]); 3779 EPI.ExceptionSpecType = EST; 3780 if (EST == EST_Dynamic) { 3781 EPI.NumExceptions = Record[Idx++]; 3782 SmallVector<QualType, 2> Exceptions; 3783 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3784 Exceptions.push_back(readType(*Loc.F, Record, Idx)); 3785 EPI.Exceptions = Exceptions.data(); 3786 } else if (EST == EST_ComputedNoexcept) { 3787 EPI.NoexceptExpr = ReadExpr(*Loc.F); 3788 } 3789 return Context.getFunctionType(ResultType, ParamTypes.data(), NumParams, 3790 EPI); 3791 } 3792 3793 case TYPE_UNRESOLVED_USING: { 3794 unsigned Idx = 0; 3795 return Context.getTypeDeclType( 3796 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); 3797 } 3798 3799 case TYPE_TYPEDEF: { 3800 if (Record.size() != 2) { 3801 Error("incorrect encoding of typedef type"); 3802 return QualType(); 3803 } 3804 unsigned Idx = 0; 3805 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); 3806 QualType Canonical = readType(*Loc.F, Record, Idx); 3807 if (!Canonical.isNull()) 3808 Canonical = Context.getCanonicalType(Canonical); 3809 return Context.getTypedefType(Decl, Canonical); 3810 } 3811 3812 case TYPE_TYPEOF_EXPR: 3813 return Context.getTypeOfExprType(ReadExpr(*Loc.F)); 3814 3815 case TYPE_TYPEOF: { 3816 if (Record.size() != 1) { 3817 Error("incorrect encoding of typeof(type) in AST file"); 3818 return QualType(); 3819 } 3820 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3821 return Context.getTypeOfType(UnderlyingType); 3822 } 3823 3824 case TYPE_DECLTYPE: 3825 return Context.getDecltypeType(ReadExpr(*Loc.F)); 3826 3827 case TYPE_UNARY_TRANSFORM: { 3828 QualType BaseType = readType(*Loc.F, Record, Idx); 3829 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3830 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; 3831 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind); 3832 } 3833 3834 case TYPE_AUTO: 3835 return Context.getAutoType(readType(*Loc.F, Record, Idx)); 3836 3837 case TYPE_RECORD: { 3838 if (Record.size() != 2) { 3839 Error("incorrect encoding of record type"); 3840 return QualType(); 3841 } 3842 unsigned Idx = 0; 3843 bool IsDependent = Record[Idx++]; 3844 QualType T 3845 = Context.getRecordType(ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx)); 3846 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3847 return T; 3848 } 3849 3850 case TYPE_ENUM: { 3851 if (Record.size() != 2) { 3852 Error("incorrect encoding of enum type"); 3853 return QualType(); 3854 } 3855 unsigned Idx = 0; 3856 bool IsDependent = Record[Idx++]; 3857 QualType T 3858 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); 3859 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3860 return T; 3861 } 3862 3863 case TYPE_ATTRIBUTED: { 3864 if (Record.size() != 3) { 3865 Error("incorrect encoding of attributed type"); 3866 return QualType(); 3867 } 3868 QualType modifiedType = readType(*Loc.F, Record, Idx); 3869 QualType equivalentType = readType(*Loc.F, Record, Idx); 3870 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3871 return Context.getAttributedType(kind, modifiedType, equivalentType); 3872 } 3873 3874 case TYPE_PAREN: { 3875 if (Record.size() != 1) { 3876 Error("incorrect encoding of paren type"); 3877 return QualType(); 3878 } 3879 QualType InnerType = readType(*Loc.F, Record, Idx); 3880 return Context.getParenType(InnerType); 3881 } 3882 3883 case TYPE_PACK_EXPANSION: { 3884 if (Record.size() != 2) { 3885 Error("incorrect encoding of pack expansion type"); 3886 return QualType(); 3887 } 3888 QualType Pattern = readType(*Loc.F, Record, Idx); 3889 if (Pattern.isNull()) 3890 return QualType(); 3891 llvm::Optional<unsigned> NumExpansions; 3892 if (Record[1]) 3893 NumExpansions = Record[1] - 1; 3894 return Context.getPackExpansionType(Pattern, NumExpansions); 3895 } 3896 3897 case TYPE_ELABORATED: { 3898 unsigned Idx = 0; 3899 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3900 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3901 QualType NamedType = readType(*Loc.F, Record, Idx); 3902 return Context.getElaboratedType(Keyword, NNS, NamedType); 3903 } 3904 3905 case TYPE_OBJC_INTERFACE: { 3906 unsigned Idx = 0; 3907 ObjCInterfaceDecl *ItfD 3908 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); 3909 return Context.getObjCInterfaceType(ItfD); 3910 } 3911 3912 case TYPE_OBJC_OBJECT: { 3913 unsigned Idx = 0; 3914 QualType Base = readType(*Loc.F, Record, Idx); 3915 unsigned NumProtos = Record[Idx++]; 3916 SmallVector<ObjCProtocolDecl*, 4> Protos; 3917 for (unsigned I = 0; I != NumProtos; ++I) 3918 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); 3919 return Context.getObjCObjectType(Base, Protos.data(), NumProtos); 3920 } 3921 3922 case TYPE_OBJC_OBJECT_POINTER: { 3923 unsigned Idx = 0; 3924 QualType Pointee = readType(*Loc.F, Record, Idx); 3925 return Context.getObjCObjectPointerType(Pointee); 3926 } 3927 3928 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3929 unsigned Idx = 0; 3930 QualType Parm = readType(*Loc.F, Record, Idx); 3931 QualType Replacement = readType(*Loc.F, Record, Idx); 3932 return 3933 Context.getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3934 Replacement); 3935 } 3936 3937 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3938 unsigned Idx = 0; 3939 QualType Parm = readType(*Loc.F, Record, Idx); 3940 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3941 return Context.getSubstTemplateTypeParmPackType( 3942 cast<TemplateTypeParmType>(Parm), 3943 ArgPack); 3944 } 3945 3946 case TYPE_INJECTED_CLASS_NAME: { 3947 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); 3948 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable 3949 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3950 // for AST reading, too much interdependencies. 3951 return 3952 QualType(new (Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3953 } 3954 3955 case TYPE_TEMPLATE_TYPE_PARM: { 3956 unsigned Idx = 0; 3957 unsigned Depth = Record[Idx++]; 3958 unsigned Index = Record[Idx++]; 3959 bool Pack = Record[Idx++]; 3960 TemplateTypeParmDecl *D 3961 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); 3962 return Context.getTemplateTypeParmType(Depth, Index, Pack, D); 3963 } 3964 3965 case TYPE_DEPENDENT_NAME: { 3966 unsigned Idx = 0; 3967 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3968 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3969 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3970 QualType Canon = readType(*Loc.F, Record, Idx); 3971 if (!Canon.isNull()) 3972 Canon = Context.getCanonicalType(Canon); 3973 return Context.getDependentNameType(Keyword, NNS, Name, Canon); 3974 } 3975 3976 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3977 unsigned Idx = 0; 3978 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3979 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3980 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3981 unsigned NumArgs = Record[Idx++]; 3982 SmallVector<TemplateArgument, 8> Args; 3983 Args.reserve(NumArgs); 3984 while (NumArgs--) 3985 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3986 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name, 3987 Args.size(), Args.data()); 3988 } 3989 3990 case TYPE_DEPENDENT_SIZED_ARRAY: { 3991 unsigned Idx = 0; 3992 3993 // ArrayType 3994 QualType ElementType = readType(*Loc.F, Record, Idx); 3995 ArrayType::ArraySizeModifier ASM 3996 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3997 unsigned IndexTypeQuals = Record[Idx++]; 3998 3999 // DependentSizedArrayType 4000 Expr *NumElts = ReadExpr(*Loc.F); 4001 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 4002 4003 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM, 4004 IndexTypeQuals, Brackets); 4005 } 4006 4007 case TYPE_TEMPLATE_SPECIALIZATION: { 4008 unsigned Idx = 0; 4009 bool IsDependent = Record[Idx++]; 4010 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 4011 SmallVector<TemplateArgument, 8> Args; 4012 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 4013 QualType Underlying = readType(*Loc.F, Record, Idx); 4014 QualType T; 4015 if (Underlying.isNull()) 4016 T = Context.getCanonicalTemplateSpecializationType(Name, Args.data(), 4017 Args.size()); 4018 else 4019 T = Context.getTemplateSpecializationType(Name, Args.data(), 4020 Args.size(), Underlying); 4021 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 4022 return T; 4023 } 4024 4025 case TYPE_ATOMIC: { 4026 if (Record.size() != 1) { 4027 Error("Incorrect encoding of atomic type"); 4028 return QualType(); 4029 } 4030 QualType ValueType = readType(*Loc.F, Record, Idx); 4031 return Context.getAtomicType(ValueType); 4032 } 4033 } 4034 // Suppress a GCC warning 4035 return QualType(); 4036} 4037 4038class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 4039 ASTReader &Reader; 4040 ModuleFile &F; 4041 llvm::BitstreamCursor &DeclsCursor; 4042 const ASTReader::RecordData &Record; 4043 unsigned &Idx; 4044 4045 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 4046 unsigned &I) { 4047 return Reader.ReadSourceLocation(F, R, I); 4048 } 4049 4050 template<typename T> 4051 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { 4052 return Reader.ReadDeclAs<T>(F, Record, Idx); 4053 } 4054 4055public: 4056 TypeLocReader(ASTReader &Reader, ModuleFile &F, 4057 const ASTReader::RecordData &Record, unsigned &Idx) 4058 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 4059 { } 4060 4061 // We want compile-time assurance that we've enumerated all of 4062 // these, so unfortunately we have to declare them first, then 4063 // define them out-of-line. 4064#define ABSTRACT_TYPELOC(CLASS, PARENT) 4065#define TYPELOC(CLASS, PARENT) \ 4066 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 4067#include "clang/AST/TypeLocNodes.def" 4068 4069 void VisitFunctionTypeLoc(FunctionTypeLoc); 4070 void VisitArrayTypeLoc(ArrayTypeLoc); 4071}; 4072 4073void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 4074 // nothing to do 4075} 4076void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 4077 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 4078 if (TL.needsExtraLocalData()) { 4079 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 4080 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 4081 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 4082 TL.setModeAttr(Record[Idx++]); 4083 } 4084} 4085void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 4086 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4087} 4088void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 4089 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 4090} 4091void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 4092 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 4093} 4094void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 4095 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 4096} 4097void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 4098 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 4099} 4100void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 4101 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 4102 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 4103} 4104void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 4105 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 4106 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 4107 if (Record[Idx++]) 4108 TL.setSizeExpr(Reader.ReadExpr(F)); 4109 else 4110 TL.setSizeExpr(0); 4111} 4112void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 4113 VisitArrayTypeLoc(TL); 4114} 4115void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 4116 VisitArrayTypeLoc(TL); 4117} 4118void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 4119 VisitArrayTypeLoc(TL); 4120} 4121void TypeLocReader::VisitDependentSizedArrayTypeLoc( 4122 DependentSizedArrayTypeLoc TL) { 4123 VisitArrayTypeLoc(TL); 4124} 4125void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 4126 DependentSizedExtVectorTypeLoc TL) { 4127 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4128} 4129void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 4130 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4131} 4132void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 4133 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4134} 4135void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 4136 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); 4137 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); 4138 TL.setTrailingReturn(Record[Idx++]); 4139 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 4140 TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); 4141 } 4142} 4143void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 4144 VisitFunctionTypeLoc(TL); 4145} 4146void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 4147 VisitFunctionTypeLoc(TL); 4148} 4149void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 4150 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4151} 4152void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 4153 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4154} 4155void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 4156 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 4157 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 4158 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 4159} 4160void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 4161 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 4162 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 4163 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 4164 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 4165} 4166void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 4167 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4168} 4169void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 4170 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 4171 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 4172 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 4173 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 4174} 4175void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 4176 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4177} 4178void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 4179 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4180} 4181void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 4182 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4183} 4184void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 4185 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 4186 if (TL.hasAttrOperand()) { 4187 SourceRange range; 4188 range.setBegin(ReadSourceLocation(Record, Idx)); 4189 range.setEnd(ReadSourceLocation(Record, Idx)); 4190 TL.setAttrOperandParensRange(range); 4191 } 4192 if (TL.hasAttrExprOperand()) { 4193 if (Record[Idx++]) 4194 TL.setAttrExprOperand(Reader.ReadExpr(F)); 4195 else 4196 TL.setAttrExprOperand(0); 4197 } else if (TL.hasAttrEnumOperand()) 4198 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 4199} 4200void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 4201 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4202} 4203void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 4204 SubstTemplateTypeParmTypeLoc TL) { 4205 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4206} 4207void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 4208 SubstTemplateTypeParmPackTypeLoc TL) { 4209 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4210} 4211void TypeLocReader::VisitTemplateSpecializationTypeLoc( 4212 TemplateSpecializationTypeLoc TL) { 4213 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 4214 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 4215 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 4216 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 4217 TL.setArgLocInfo(i, 4218 Reader.GetTemplateArgumentLocInfo(F, 4219 TL.getTypePtr()->getArg(i).getKind(), 4220 Record, Idx)); 4221} 4222void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 4223 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 4224 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 4225} 4226void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 4227 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 4228 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 4229} 4230void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 4231 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4232} 4233void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 4234 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 4235 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 4236 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4237} 4238void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 4239 DependentTemplateSpecializationTypeLoc TL) { 4240 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 4241 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 4242 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4243 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 4244 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 4245 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 4246 TL.setArgLocInfo(I, 4247 Reader.GetTemplateArgumentLocInfo(F, 4248 TL.getTypePtr()->getArg(I).getKind(), 4249 Record, Idx)); 4250} 4251void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 4252 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 4253} 4254void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 4255 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 4256} 4257void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 4258 TL.setHasBaseTypeAsWritten(Record[Idx++]); 4259 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 4260 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 4261 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 4262 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 4263} 4264void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 4265 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 4266} 4267void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) { 4268 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 4269 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 4270 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 4271} 4272 4273TypeSourceInfo *ASTReader::GetTypeSourceInfo(ModuleFile &F, 4274 const RecordData &Record, 4275 unsigned &Idx) { 4276 QualType InfoTy = readType(F, Record, Idx); 4277 if (InfoTy.isNull()) 4278 return 0; 4279 4280 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy); 4281 TypeLocReader TLR(*this, F, Record, Idx); 4282 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 4283 TLR.Visit(TL); 4284 return TInfo; 4285} 4286 4287QualType ASTReader::GetType(TypeID ID) { 4288 unsigned FastQuals = ID & Qualifiers::FastMask; 4289 unsigned Index = ID >> Qualifiers::FastWidth; 4290 4291 if (Index < NUM_PREDEF_TYPE_IDS) { 4292 QualType T; 4293 switch ((PredefinedTypeIDs)Index) { 4294 case PREDEF_TYPE_NULL_ID: return QualType(); 4295 case PREDEF_TYPE_VOID_ID: T = Context.VoidTy; break; 4296 case PREDEF_TYPE_BOOL_ID: T = Context.BoolTy; break; 4297 4298 case PREDEF_TYPE_CHAR_U_ID: 4299 case PREDEF_TYPE_CHAR_S_ID: 4300 // FIXME: Check that the signedness of CharTy is correct! 4301 T = Context.CharTy; 4302 break; 4303 4304 case PREDEF_TYPE_UCHAR_ID: T = Context.UnsignedCharTy; break; 4305 case PREDEF_TYPE_USHORT_ID: T = Context.UnsignedShortTy; break; 4306 case PREDEF_TYPE_UINT_ID: T = Context.UnsignedIntTy; break; 4307 case PREDEF_TYPE_ULONG_ID: T = Context.UnsignedLongTy; break; 4308 case PREDEF_TYPE_ULONGLONG_ID: T = Context.UnsignedLongLongTy; break; 4309 case PREDEF_TYPE_UINT128_ID: T = Context.UnsignedInt128Ty; break; 4310 case PREDEF_TYPE_SCHAR_ID: T = Context.SignedCharTy; break; 4311 case PREDEF_TYPE_WCHAR_ID: T = Context.WCharTy; break; 4312 case PREDEF_TYPE_SHORT_ID: T = Context.ShortTy; break; 4313 case PREDEF_TYPE_INT_ID: T = Context.IntTy; break; 4314 case PREDEF_TYPE_LONG_ID: T = Context.LongTy; break; 4315 case PREDEF_TYPE_LONGLONG_ID: T = Context.LongLongTy; break; 4316 case PREDEF_TYPE_INT128_ID: T = Context.Int128Ty; break; 4317 case PREDEF_TYPE_HALF_ID: T = Context.HalfTy; break; 4318 case PREDEF_TYPE_FLOAT_ID: T = Context.FloatTy; break; 4319 case PREDEF_TYPE_DOUBLE_ID: T = Context.DoubleTy; break; 4320 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context.LongDoubleTy; break; 4321 case PREDEF_TYPE_OVERLOAD_ID: T = Context.OverloadTy; break; 4322 case PREDEF_TYPE_BOUND_MEMBER: T = Context.BoundMemberTy; break; 4323 case PREDEF_TYPE_PSEUDO_OBJECT: T = Context.PseudoObjectTy; break; 4324 case PREDEF_TYPE_DEPENDENT_ID: T = Context.DependentTy; break; 4325 case PREDEF_TYPE_UNKNOWN_ANY: T = Context.UnknownAnyTy; break; 4326 case PREDEF_TYPE_NULLPTR_ID: T = Context.NullPtrTy; break; 4327 case PREDEF_TYPE_CHAR16_ID: T = Context.Char16Ty; break; 4328 case PREDEF_TYPE_CHAR32_ID: T = Context.Char32Ty; break; 4329 case PREDEF_TYPE_OBJC_ID: T = Context.ObjCBuiltinIdTy; break; 4330 case PREDEF_TYPE_OBJC_CLASS: T = Context.ObjCBuiltinClassTy; break; 4331 case PREDEF_TYPE_OBJC_SEL: T = Context.ObjCBuiltinSelTy; break; 4332 case PREDEF_TYPE_AUTO_DEDUCT: T = Context.getAutoDeductType(); break; 4333 4334 case PREDEF_TYPE_AUTO_RREF_DEDUCT: 4335 T = Context.getAutoRRefDeductType(); 4336 break; 4337 4338 case PREDEF_TYPE_ARC_UNBRIDGED_CAST: 4339 T = Context.ARCUnbridgedCastTy; 4340 break; 4341 4342 } 4343 4344 assert(!T.isNull() && "Unknown predefined type"); 4345 return T.withFastQualifiers(FastQuals); 4346 } 4347 4348 Index -= NUM_PREDEF_TYPE_IDS; 4349 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 4350 if (TypesLoaded[Index].isNull()) { 4351 TypesLoaded[Index] = readTypeRecord(Index); 4352 if (TypesLoaded[Index].isNull()) 4353 return QualType(); 4354 4355 TypesLoaded[Index]->setFromAST(); 4356 if (DeserializationListener) 4357 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 4358 TypesLoaded[Index]); 4359 } 4360 4361 return TypesLoaded[Index].withFastQualifiers(FastQuals); 4362} 4363 4364QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) { 4365 return GetType(getGlobalTypeID(F, LocalID)); 4366} 4367 4368serialization::TypeID 4369ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const { 4370 unsigned FastQuals = LocalID & Qualifiers::FastMask; 4371 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; 4372 4373 if (LocalIndex < NUM_PREDEF_TYPE_IDS) 4374 return LocalID; 4375 4376 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4377 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); 4378 assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); 4379 4380 unsigned GlobalIndex = LocalIndex + I->second; 4381 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; 4382} 4383 4384TemplateArgumentLocInfo 4385ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F, 4386 TemplateArgument::ArgKind Kind, 4387 const RecordData &Record, 4388 unsigned &Index) { 4389 switch (Kind) { 4390 case TemplateArgument::Expression: 4391 return ReadExpr(F); 4392 case TemplateArgument::Type: 4393 return GetTypeSourceInfo(F, Record, Index); 4394 case TemplateArgument::Template: { 4395 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4396 Index); 4397 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4398 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4399 SourceLocation()); 4400 } 4401 case TemplateArgument::TemplateExpansion: { 4402 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4403 Index); 4404 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4405 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 4406 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4407 EllipsisLoc); 4408 } 4409 case TemplateArgument::Null: 4410 case TemplateArgument::Integral: 4411 case TemplateArgument::Declaration: 4412 case TemplateArgument::Pack: 4413 return TemplateArgumentLocInfo(); 4414 } 4415 llvm_unreachable("unexpected template argument loc"); 4416 return TemplateArgumentLocInfo(); 4417} 4418 4419TemplateArgumentLoc 4420ASTReader::ReadTemplateArgumentLoc(ModuleFile &F, 4421 const RecordData &Record, unsigned &Index) { 4422 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 4423 4424 if (Arg.getKind() == TemplateArgument::Expression) { 4425 if (Record[Index++]) // bool InfoHasSameExpr. 4426 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 4427 } 4428 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 4429 Record, Index)); 4430} 4431 4432Decl *ASTReader::GetExternalDecl(uint32_t ID) { 4433 return GetDecl(ID); 4434} 4435 4436uint64_t ASTReader::readCXXBaseSpecifiers(ModuleFile &M, const RecordData &Record, 4437 unsigned &Idx){ 4438 if (Idx >= Record.size()) 4439 return 0; 4440 4441 unsigned LocalID = Record[Idx++]; 4442 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); 4443} 4444 4445CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 4446 RecordLocation Loc = getLocalBitOffset(Offset); 4447 llvm::BitstreamCursor &Cursor = Loc.F->DeclsCursor; 4448 SavedStreamPosition SavedPosition(Cursor); 4449 Cursor.JumpToBit(Loc.Offset); 4450 ReadingKindTracker ReadingKind(Read_Decl, *this); 4451 RecordData Record; 4452 unsigned Code = Cursor.ReadCode(); 4453 unsigned RecCode = Cursor.ReadRecord(Code, Record); 4454 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 4455 Error("Malformed AST file: missing C++ base specifiers"); 4456 return 0; 4457 } 4458 4459 unsigned Idx = 0; 4460 unsigned NumBases = Record[Idx++]; 4461 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases); 4462 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 4463 for (unsigned I = 0; I != NumBases; ++I) 4464 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); 4465 return Bases; 4466} 4467 4468serialization::DeclID 4469ASTReader::getGlobalDeclID(ModuleFile &F, unsigned LocalID) const { 4470 if (LocalID < NUM_PREDEF_DECL_IDS) 4471 return LocalID; 4472 4473 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4474 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); 4475 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); 4476 4477 return LocalID + I->second; 4478} 4479 4480bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID, 4481 ModuleFile &M) const { 4482 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(ID); 4483 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map"); 4484 return &M == I->second; 4485} 4486 4487SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) { 4488 if (ID < NUM_PREDEF_DECL_IDS) 4489 return SourceLocation(); 4490 4491 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 4492 4493 if (Index > DeclsLoaded.size()) { 4494 Error("declaration ID out-of-range for AST file"); 4495 return SourceLocation(); 4496 } 4497 4498 if (Decl *D = DeclsLoaded[Index]) 4499 return D->getLocation(); 4500 4501 unsigned RawLocation = 0; 4502 RecordLocation Rec = DeclCursorForID(ID, RawLocation); 4503 return ReadSourceLocation(*Rec.F, RawLocation); 4504} 4505 4506Decl *ASTReader::GetDecl(DeclID ID) { 4507 if (ID < NUM_PREDEF_DECL_IDS) { 4508 switch ((PredefinedDeclIDs)ID) { 4509 case PREDEF_DECL_NULL_ID: 4510 return 0; 4511 4512 case PREDEF_DECL_TRANSLATION_UNIT_ID: 4513 return Context.getTranslationUnitDecl(); 4514 4515 case PREDEF_DECL_OBJC_ID_ID: 4516 return Context.getObjCIdDecl(); 4517 4518 case PREDEF_DECL_OBJC_SEL_ID: 4519 return Context.getObjCSelDecl(); 4520 4521 case PREDEF_DECL_OBJC_CLASS_ID: 4522 return Context.getObjCClassDecl(); 4523 4524 case PREDEF_DECL_INT_128_ID: 4525 return Context.getInt128Decl(); 4526 4527 case PREDEF_DECL_UNSIGNED_INT_128_ID: 4528 return Context.getUInt128Decl(); 4529 4530 case PREDEF_DECL_OBJC_INSTANCETYPE_ID: 4531 return Context.getObjCInstanceTypeDecl(); 4532 } 4533 4534 return 0; 4535 } 4536 4537 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 4538 4539 if (Index > DeclsLoaded.size()) { 4540 Error("declaration ID out-of-range for AST file"); 4541 return 0; 4542 } 4543 4544if (!DeclsLoaded[Index]) { 4545 ReadDeclRecord(ID); 4546 if (DeserializationListener) 4547 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 4548 } 4549 4550 return DeclsLoaded[Index]; 4551} 4552 4553serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F, 4554 const RecordData &Record, 4555 unsigned &Idx) { 4556 if (Idx >= Record.size()) { 4557 Error("Corrupted AST file"); 4558 return 0; 4559 } 4560 4561 return getGlobalDeclID(F, Record[Idx++]); 4562} 4563 4564/// \brief Resolve the offset of a statement into a statement. 4565/// 4566/// This operation will read a new statement from the external 4567/// source each time it is called, and is meant to be used via a 4568/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 4569Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 4570 // Switch case IDs are per Decl. 4571 ClearSwitchCaseIDs(); 4572 4573 // Offset here is a global offset across the entire chain. 4574 RecordLocation Loc = getLocalBitOffset(Offset); 4575 Loc.F->DeclsCursor.JumpToBit(Loc.Offset); 4576 return ReadStmtFromStream(*Loc.F); 4577} 4578 4579namespace { 4580 class FindExternalLexicalDeclsVisitor { 4581 ASTReader &Reader; 4582 const DeclContext *DC; 4583 bool (*isKindWeWant)(Decl::Kind); 4584 4585 SmallVectorImpl<Decl*> &Decls; 4586 bool PredefsVisited[NUM_PREDEF_DECL_IDS]; 4587 4588 public: 4589 FindExternalLexicalDeclsVisitor(ASTReader &Reader, const DeclContext *DC, 4590 bool (*isKindWeWant)(Decl::Kind), 4591 SmallVectorImpl<Decl*> &Decls) 4592 : Reader(Reader), DC(DC), isKindWeWant(isKindWeWant), Decls(Decls) 4593 { 4594 for (unsigned I = 0; I != NUM_PREDEF_DECL_IDS; ++I) 4595 PredefsVisited[I] = false; 4596 } 4597 4598 static bool visit(ModuleFile &M, bool Preorder, void *UserData) { 4599 if (Preorder) 4600 return false; 4601 4602 FindExternalLexicalDeclsVisitor *This 4603 = static_cast<FindExternalLexicalDeclsVisitor *>(UserData); 4604 4605 ModuleFile::DeclContextInfosMap::iterator Info 4606 = M.DeclContextInfos.find(This->DC); 4607 if (Info == M.DeclContextInfos.end() || !Info->second.LexicalDecls) 4608 return false; 4609 4610 // Load all of the declaration IDs 4611 for (const KindDeclIDPair *ID = Info->second.LexicalDecls, 4612 *IDE = ID + Info->second.NumLexicalDecls; 4613 ID != IDE; ++ID) { 4614 if (This->isKindWeWant && !This->isKindWeWant((Decl::Kind)ID->first)) 4615 continue; 4616 4617 // Don't add predefined declarations to the lexical context more 4618 // than once. 4619 if (ID->second < NUM_PREDEF_DECL_IDS) { 4620 if (This->PredefsVisited[ID->second]) 4621 continue; 4622 4623 This->PredefsVisited[ID->second] = true; 4624 } 4625 4626 if (Decl *D = This->Reader.GetLocalDecl(M, ID->second)) { 4627 if (!This->DC->isDeclInLexicalTraversal(D)) 4628 This->Decls.push_back(D); 4629 } 4630 } 4631 4632 return false; 4633 } 4634 }; 4635} 4636 4637ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 4638 bool (*isKindWeWant)(Decl::Kind), 4639 SmallVectorImpl<Decl*> &Decls) { 4640 // There might be lexical decls in multiple modules, for the TU at 4641 // least. Walk all of the modules in the order they were loaded. 4642 FindExternalLexicalDeclsVisitor Visitor(*this, DC, isKindWeWant, Decls); 4643 ModuleMgr.visitDepthFirst(&FindExternalLexicalDeclsVisitor::visit, &Visitor); 4644 ++NumLexicalDeclContextsRead; 4645 return ELR_Success; 4646} 4647 4648namespace { 4649 4650class DeclIDComp { 4651 ASTReader &Reader; 4652 ModuleFile &Mod; 4653 4654public: 4655 DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {} 4656 4657 bool operator()(LocalDeclID L, LocalDeclID R) const { 4658 SourceLocation LHS = getLocation(L); 4659 SourceLocation RHS = getLocation(R); 4660 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 4661 } 4662 4663 bool operator()(SourceLocation LHS, LocalDeclID R) const { 4664 SourceLocation RHS = getLocation(R); 4665 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 4666 } 4667 4668 bool operator()(LocalDeclID L, SourceLocation RHS) const { 4669 SourceLocation LHS = getLocation(L); 4670 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); 4671 } 4672 4673 SourceLocation getLocation(LocalDeclID ID) const { 4674 return Reader.getSourceManager().getFileLoc( 4675 Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID))); 4676 } 4677}; 4678 4679} 4680 4681void ASTReader::FindFileRegionDecls(FileID File, 4682 unsigned Offset, unsigned Length, 4683 SmallVectorImpl<Decl *> &Decls) { 4684 SourceManager &SM = getSourceManager(); 4685 4686 llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File); 4687 if (I == FileDeclIDs.end()) 4688 return; 4689 4690 FileDeclsInfo &DInfo = I->second; 4691 if (DInfo.Decls.empty()) 4692 return; 4693 4694 SourceLocation 4695 BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset); 4696 SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length); 4697 4698 DeclIDComp DIDComp(*this, *DInfo.Mod); 4699 ArrayRef<serialization::LocalDeclID>::iterator 4700 BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(), 4701 BeginLoc, DIDComp); 4702 if (BeginIt != DInfo.Decls.begin()) 4703 --BeginIt; 4704 4705 // If we are pointing at a top-level decl inside an objc container, we need 4706 // to backtrack until we find it otherwise we will fail to report that the 4707 // region overlaps with an objc container. 4708 while (BeginIt != DInfo.Decls.begin() && 4709 GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt)) 4710 ->isTopLevelDeclInObjCContainer()) 4711 --BeginIt; 4712 4713 ArrayRef<serialization::LocalDeclID>::iterator 4714 EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(), 4715 EndLoc, DIDComp); 4716 if (EndIt != DInfo.Decls.end()) 4717 ++EndIt; 4718 4719 for (ArrayRef<serialization::LocalDeclID>::iterator 4720 DIt = BeginIt; DIt != EndIt; ++DIt) 4721 Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt))); 4722} 4723 4724namespace { 4725 /// \brief ModuleFile visitor used to perform name lookup into a 4726 /// declaration context. 4727 class DeclContextNameLookupVisitor { 4728 ASTReader &Reader; 4729 const DeclContext *DC; 4730 DeclarationName Name; 4731 SmallVectorImpl<NamedDecl *> &Decls; 4732 4733 public: 4734 DeclContextNameLookupVisitor(ASTReader &Reader, 4735 const DeclContext *DC, DeclarationName Name, 4736 SmallVectorImpl<NamedDecl *> &Decls) 4737 : Reader(Reader), DC(DC), Name(Name), Decls(Decls) { } 4738 4739 static bool visit(ModuleFile &M, void *UserData) { 4740 DeclContextNameLookupVisitor *This 4741 = static_cast<DeclContextNameLookupVisitor *>(UserData); 4742 4743 // Check whether we have any visible declaration information for 4744 // this context in this module. 4745 ModuleFile::DeclContextInfosMap::iterator Info 4746 = M.DeclContextInfos.find(This->DC); 4747 if (Info == M.DeclContextInfos.end() || !Info->second.NameLookupTableData) 4748 return false; 4749 4750 // Look for this name within this module. 4751 ASTDeclContextNameLookupTable *LookupTable = 4752 (ASTDeclContextNameLookupTable*)Info->second.NameLookupTableData; 4753 ASTDeclContextNameLookupTable::iterator Pos 4754 = LookupTable->find(This->Name); 4755 if (Pos == LookupTable->end()) 4756 return false; 4757 4758 bool FoundAnything = false; 4759 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 4760 for (; Data.first != Data.second; ++Data.first) { 4761 NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M, *Data.first); 4762 if (!ND) 4763 continue; 4764 4765 if (ND->getDeclName() != This->Name) { 4766 assert(!This->Name.getCXXNameType().isNull() && 4767 "Name mismatch without a type"); 4768 continue; 4769 } 4770 4771 // Record this declaration. 4772 FoundAnything = true; 4773 This->Decls.push_back(ND); 4774 } 4775 4776 return FoundAnything; 4777 } 4778 }; 4779} 4780 4781DeclContext::lookup_result 4782ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 4783 DeclarationName Name) { 4784 assert(DC->hasExternalVisibleStorage() && 4785 "DeclContext has no visible decls in storage"); 4786 if (!Name) 4787 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 4788 DeclContext::lookup_iterator(0)); 4789 4790 SmallVector<NamedDecl *, 64> Decls; 4791 DeclContextNameLookupVisitor Visitor(*this, DC, Name, Decls); 4792 ModuleMgr.visit(&DeclContextNameLookupVisitor::visit, &Visitor); 4793 ++NumVisibleDeclContextsRead; 4794 SetExternalVisibleDeclsForName(DC, Name, Decls); 4795 return const_cast<DeclContext*>(DC)->lookup(Name); 4796} 4797 4798/// \brief Under non-PCH compilation the consumer receives the objc methods 4799/// before receiving the implementation, and codegen depends on this. 4800/// We simulate this by deserializing and passing to consumer the methods of the 4801/// implementation before passing the deserialized implementation decl. 4802static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD, 4803 ASTConsumer *Consumer) { 4804 assert(ImplD && Consumer); 4805 4806 for (ObjCImplDecl::method_iterator 4807 I = ImplD->meth_begin(), E = ImplD->meth_end(); I != E; ++I) 4808 Consumer->HandleInterestingDecl(DeclGroupRef(*I)); 4809 4810 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD)); 4811} 4812 4813void ASTReader::PassInterestingDeclsToConsumer() { 4814 assert(Consumer); 4815 while (!InterestingDecls.empty()) { 4816 Decl *D = InterestingDecls.front(); 4817 InterestingDecls.pop_front(); 4818 4819 PassInterestingDeclToConsumer(D); 4820 } 4821} 4822 4823void ASTReader::PassInterestingDeclToConsumer(Decl *D) { 4824 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D)) 4825 PassObjCImplDeclToConsumer(ImplD, Consumer); 4826 else 4827 Consumer->HandleInterestingDecl(DeclGroupRef(D)); 4828} 4829 4830void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 4831 this->Consumer = Consumer; 4832 4833 if (!Consumer) 4834 return; 4835 4836 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 4837 // Force deserialization of this decl, which will cause it to be queued for 4838 // passing to the consumer. 4839 GetDecl(ExternalDefinitions[I]); 4840 } 4841 ExternalDefinitions.clear(); 4842 4843 PassInterestingDeclsToConsumer(); 4844} 4845 4846void ASTReader::PrintStats() { 4847 std::fprintf(stderr, "*** AST File Statistics:\n"); 4848 4849 unsigned NumTypesLoaded 4850 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 4851 QualType()); 4852 unsigned NumDeclsLoaded 4853 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 4854 (Decl *)0); 4855 unsigned NumIdentifiersLoaded 4856 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 4857 IdentifiersLoaded.end(), 4858 (IdentifierInfo *)0); 4859 unsigned NumSelectorsLoaded 4860 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 4861 SelectorsLoaded.end(), 4862 Selector()); 4863 4864 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 4865 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 4866 if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) 4867 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 4868 NumSLocEntriesRead, TotalNumSLocEntries, 4869 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 4870 if (!TypesLoaded.empty()) 4871 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 4872 NumTypesLoaded, (unsigned)TypesLoaded.size(), 4873 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 4874 if (!DeclsLoaded.empty()) 4875 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 4876 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 4877 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 4878 if (!IdentifiersLoaded.empty()) 4879 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 4880 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4881 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4882 if (!SelectorsLoaded.empty()) 4883 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4884 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4885 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4886 if (TotalNumStatements) 4887 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4888 NumStatementsRead, TotalNumStatements, 4889 ((float)NumStatementsRead/TotalNumStatements * 100)); 4890 if (TotalNumMacros) 4891 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4892 NumMacrosRead, TotalNumMacros, 4893 ((float)NumMacrosRead/TotalNumMacros * 100)); 4894 if (TotalLexicalDeclContexts) 4895 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4896 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4897 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4898 * 100)); 4899 if (TotalVisibleDeclContexts) 4900 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4901 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4902 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4903 * 100)); 4904 if (TotalNumMethodPoolEntries) { 4905 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4906 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4907 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4908 * 100)); 4909 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4910 } 4911 std::fprintf(stderr, "\n"); 4912 dump(); 4913 std::fprintf(stderr, "\n"); 4914} 4915 4916template<typename Key, typename ModuleFile, unsigned InitialCapacity> 4917static void 4918dumpModuleIDMap(StringRef Name, 4919 const ContinuousRangeMap<Key, ModuleFile *, 4920 InitialCapacity> &Map) { 4921 if (Map.begin() == Map.end()) 4922 return; 4923 4924 typedef ContinuousRangeMap<Key, ModuleFile *, InitialCapacity> MapType; 4925 llvm::errs() << Name << ":\n"; 4926 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 4927 I != IEnd; ++I) { 4928 llvm::errs() << " " << I->first << " -> " << I->second->FileName 4929 << "\n"; 4930 } 4931} 4932 4933void ASTReader::dump() { 4934 llvm::errs() << "*** PCH/ModuleFile Remappings:\n"; 4935 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); 4936 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); 4937 dumpModuleIDMap("Global type map", GlobalTypeMap); 4938 dumpModuleIDMap("Global declaration map", GlobalDeclMap); 4939 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); 4940 dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap); 4941 dumpModuleIDMap("Global selector map", GlobalSelectorMap); 4942 dumpModuleIDMap("Global preprocessed entity map", 4943 GlobalPreprocessedEntityMap); 4944 4945 llvm::errs() << "\n*** PCH/Modules Loaded:"; 4946 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), 4947 MEnd = ModuleMgr.end(); 4948 M != MEnd; ++M) 4949 (*M)->dump(); 4950} 4951 4952/// Return the amount of memory used by memory buffers, breaking down 4953/// by heap-backed versus mmap'ed memory. 4954void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { 4955 for (ModuleConstIterator I = ModuleMgr.begin(), 4956 E = ModuleMgr.end(); I != E; ++I) { 4957 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { 4958 size_t bytes = buf->getBufferSize(); 4959 switch (buf->getBufferKind()) { 4960 case llvm::MemoryBuffer::MemoryBuffer_Malloc: 4961 sizes.malloc_bytes += bytes; 4962 break; 4963 case llvm::MemoryBuffer::MemoryBuffer_MMap: 4964 sizes.mmap_bytes += bytes; 4965 break; 4966 } 4967 } 4968 } 4969} 4970 4971void ASTReader::InitializeSema(Sema &S) { 4972 SemaObj = &S; 4973 S.ExternalSource = this; 4974 4975 // Makes sure any declarations that were deserialized "too early" 4976 // still get added to the identifier's declaration chains. 4977 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4978 SemaObj->pushExternalDeclIntoScope(PreloadedDecls[I], 4979 PreloadedDecls[I]->getDeclName()); 4980 } 4981 PreloadedDecls.clear(); 4982 4983 // Load the offsets of the declarations that Sema references. 4984 // They will be lazily deserialized when needed. 4985 if (!SemaDeclRefs.empty()) { 4986 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4987 if (!SemaObj->StdNamespace) 4988 SemaObj->StdNamespace = SemaDeclRefs[0]; 4989 if (!SemaObj->StdBadAlloc) 4990 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4991 } 4992 4993 if (!FPPragmaOptions.empty()) { 4994 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4995 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4996 } 4997 4998 if (!OpenCLExtensions.empty()) { 4999 unsigned I = 0; 5000#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 5001#include "clang/Basic/OpenCLExtensions.def" 5002 5003 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 5004 } 5005} 5006 5007IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 5008 IdentifierLookupVisitor Visitor(StringRef(NameStart, NameEnd - NameStart)); 5009 ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor); 5010 IdentifierInfo *II = Visitor.getIdentifierInfo(); 5011 if (II) 5012 II->setOutOfDate(false); 5013 return II; 5014} 5015 5016namespace clang { 5017 /// \brief An identifier-lookup iterator that enumerates all of the 5018 /// identifiers stored within a set of AST files. 5019 class ASTIdentifierIterator : public IdentifierIterator { 5020 /// \brief The AST reader whose identifiers are being enumerated. 5021 const ASTReader &Reader; 5022 5023 /// \brief The current index into the chain of AST files stored in 5024 /// the AST reader. 5025 unsigned Index; 5026 5027 /// \brief The current position within the identifier lookup table 5028 /// of the current AST file. 5029 ASTIdentifierLookupTable::key_iterator Current; 5030 5031 /// \brief The end position within the identifier lookup table of 5032 /// the current AST file. 5033 ASTIdentifierLookupTable::key_iterator End; 5034 5035 public: 5036 explicit ASTIdentifierIterator(const ASTReader &Reader); 5037 5038 virtual StringRef Next(); 5039 }; 5040} 5041 5042ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 5043 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { 5044 ASTIdentifierLookupTable *IdTable 5045 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; 5046 Current = IdTable->key_begin(); 5047 End = IdTable->key_end(); 5048} 5049 5050StringRef ASTIdentifierIterator::Next() { 5051 while (Current == End) { 5052 // If we have exhausted all of our AST files, we're done. 5053 if (Index == 0) 5054 return StringRef(); 5055 5056 --Index; 5057 ASTIdentifierLookupTable *IdTable 5058 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. 5059 IdentifierLookupTable; 5060 Current = IdTable->key_begin(); 5061 End = IdTable->key_end(); 5062 } 5063 5064 // We have any identifiers remaining in the current AST file; return 5065 // the next one. 5066 std::pair<const char*, unsigned> Key = *Current; 5067 ++Current; 5068 return StringRef(Key.first, Key.second); 5069} 5070 5071IdentifierIterator *ASTReader::getIdentifiers() const { 5072 return new ASTIdentifierIterator(*this); 5073} 5074 5075namespace clang { namespace serialization { 5076 class ReadMethodPoolVisitor { 5077 ASTReader &Reader; 5078 Selector Sel; 5079 llvm::SmallVector<ObjCMethodDecl *, 4> InstanceMethods; 5080 llvm::SmallVector<ObjCMethodDecl *, 4> FactoryMethods; 5081 5082 /// \brief Build an ObjCMethodList from a vector of Objective-C method 5083 /// declarations. 5084 ObjCMethodList 5085 buildObjCMethodList(const SmallVectorImpl<ObjCMethodDecl *> &Vec) const 5086 { 5087 ObjCMethodList List; 5088 ObjCMethodList *Prev = 0; 5089 for (unsigned I = 0, N = Vec.size(); I != N; ++I) { 5090 if (!List.Method) { 5091 // This is the first method, which is the easy case. 5092 List.Method = Vec[I]; 5093 Prev = &List; 5094 continue; 5095 } 5096 5097 ObjCMethodList *Mem = 5098 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 5099 Prev->Next = new (Mem) ObjCMethodList(Vec[I], 0); 5100 Prev = Prev->Next; 5101 } 5102 5103 return List; 5104 } 5105 5106 public: 5107 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel) 5108 : Reader(Reader), Sel(Sel) { } 5109 5110 static bool visit(ModuleFile &M, void *UserData) { 5111 ReadMethodPoolVisitor *This 5112 = static_cast<ReadMethodPoolVisitor *>(UserData); 5113 5114 if (!M.SelectorLookupTable) 5115 return false; 5116 5117 ASTSelectorLookupTable *PoolTable 5118 = (ASTSelectorLookupTable*)M.SelectorLookupTable; 5119 ASTSelectorLookupTable::iterator Pos = PoolTable->find(This->Sel); 5120 if (Pos == PoolTable->end()) 5121 return false; 5122 5123 ++This->Reader.NumSelectorsRead; 5124 // FIXME: Not quite happy with the statistics here. We probably should 5125 // disable this tracking when called via LoadSelector. 5126 // Also, should entries without methods count as misses? 5127 ++This->Reader.NumMethodPoolEntriesRead; 5128 ASTSelectorLookupTrait::data_type Data = *Pos; 5129 if (This->Reader.DeserializationListener) 5130 This->Reader.DeserializationListener->SelectorRead(Data.ID, 5131 This->Sel); 5132 5133 This->InstanceMethods.append(Data.Instance.begin(), Data.Instance.end()); 5134 This->FactoryMethods.append(Data.Factory.begin(), Data.Factory.end()); 5135 return true; 5136 } 5137 5138 /// \brief Retrieve the instance methods found by this visitor. 5139 ObjCMethodList getInstanceMethods() const { 5140 return buildObjCMethodList(InstanceMethods); 5141 } 5142 5143 /// \brief Retrieve the instance methods found by this visitor. 5144 ObjCMethodList getFactoryMethods() const { 5145 return buildObjCMethodList(FactoryMethods); 5146 } 5147 }; 5148} } // end namespace clang::serialization 5149 5150std::pair<ObjCMethodList, ObjCMethodList> 5151ASTReader::ReadMethodPool(Selector Sel) { 5152 ReadMethodPoolVisitor Visitor(*this, Sel); 5153 ModuleMgr.visit(&ReadMethodPoolVisitor::visit, &Visitor); 5154 std::pair<ObjCMethodList, ObjCMethodList> Result; 5155 Result.first = Visitor.getInstanceMethods(); 5156 Result.second = Visitor.getFactoryMethods(); 5157 5158 if (!Result.first.Method && !Result.second.Method) 5159 ++NumMethodPoolMisses; 5160 return Result; 5161} 5162 5163void ASTReader::ReadKnownNamespaces( 5164 SmallVectorImpl<NamespaceDecl *> &Namespaces) { 5165 Namespaces.clear(); 5166 5167 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { 5168 if (NamespaceDecl *Namespace 5169 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) 5170 Namespaces.push_back(Namespace); 5171 } 5172} 5173 5174void ASTReader::ReadTentativeDefinitions( 5175 SmallVectorImpl<VarDecl *> &TentativeDefs) { 5176 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 5177 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); 5178 if (Var) 5179 TentativeDefs.push_back(Var); 5180 } 5181 TentativeDefinitions.clear(); 5182} 5183 5184void ASTReader::ReadUnusedFileScopedDecls( 5185 SmallVectorImpl<const DeclaratorDecl *> &Decls) { 5186 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 5187 DeclaratorDecl *D 5188 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 5189 if (D) 5190 Decls.push_back(D); 5191 } 5192 UnusedFileScopedDecls.clear(); 5193} 5194 5195void ASTReader::ReadDelegatingConstructors( 5196 SmallVectorImpl<CXXConstructorDecl *> &Decls) { 5197 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { 5198 CXXConstructorDecl *D 5199 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); 5200 if (D) 5201 Decls.push_back(D); 5202 } 5203 DelegatingCtorDecls.clear(); 5204} 5205 5206void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { 5207 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { 5208 TypedefNameDecl *D 5209 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); 5210 if (D) 5211 Decls.push_back(D); 5212 } 5213 ExtVectorDecls.clear(); 5214} 5215 5216void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { 5217 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { 5218 CXXRecordDecl *D 5219 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); 5220 if (D) 5221 Decls.push_back(D); 5222 } 5223 DynamicClasses.clear(); 5224} 5225 5226void 5227ASTReader::ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl *> &Decls) { 5228 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 5229 NamedDecl *D 5230 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 5231 if (D) 5232 Decls.push_back(D); 5233 } 5234 LocallyScopedExternalDecls.clear(); 5235} 5236 5237void ASTReader::ReadReferencedSelectors( 5238 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { 5239 if (ReferencedSelectorsData.empty()) 5240 return; 5241 5242 // If there are @selector references added them to its pool. This is for 5243 // implementation of -Wselector. 5244 unsigned int DataSize = ReferencedSelectorsData.size()-1; 5245 unsigned I = 0; 5246 while (I < DataSize) { 5247 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); 5248 SourceLocation SelLoc 5249 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); 5250 Sels.push_back(std::make_pair(Sel, SelLoc)); 5251 } 5252 ReferencedSelectorsData.clear(); 5253} 5254 5255void ASTReader::ReadWeakUndeclaredIdentifiers( 5256 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { 5257 if (WeakUndeclaredIdentifiers.empty()) 5258 return; 5259 5260 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { 5261 IdentifierInfo *WeakId 5262 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 5263 IdentifierInfo *AliasId 5264 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 5265 SourceLocation Loc 5266 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); 5267 bool Used = WeakUndeclaredIdentifiers[I++]; 5268 WeakInfo WI(AliasId, Loc); 5269 WI.setUsed(Used); 5270 WeakIDs.push_back(std::make_pair(WeakId, WI)); 5271 } 5272 WeakUndeclaredIdentifiers.clear(); 5273} 5274 5275void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { 5276 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { 5277 ExternalVTableUse VT; 5278 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 5279 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); 5280 VT.DefinitionRequired = VTableUses[Idx++]; 5281 VTables.push_back(VT); 5282 } 5283 5284 VTableUses.clear(); 5285} 5286 5287void ASTReader::ReadPendingInstantiations( 5288 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { 5289 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { 5290 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); 5291 SourceLocation Loc 5292 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); 5293 Pending.push_back(std::make_pair(D, Loc)); 5294 } 5295 PendingInstantiations.clear(); 5296} 5297 5298void ASTReader::LoadSelector(Selector Sel) { 5299 // It would be complicated to avoid reading the methods anyway. So don't. 5300 ReadMethodPool(Sel); 5301} 5302 5303void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { 5304 assert(ID && "Non-zero identifier ID required"); 5305 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 5306 IdentifiersLoaded[ID - 1] = II; 5307 if (DeserializationListener) 5308 DeserializationListener->IdentifierRead(ID, II); 5309} 5310 5311/// \brief Set the globally-visible declarations associated with the given 5312/// identifier. 5313/// 5314/// If the AST reader is currently in a state where the given declaration IDs 5315/// cannot safely be resolved, they are queued until it is safe to resolve 5316/// them. 5317/// 5318/// \param II an IdentifierInfo that refers to one or more globally-visible 5319/// declarations. 5320/// 5321/// \param DeclIDs the set of declaration IDs with the name @p II that are 5322/// visible at global scope. 5323/// 5324/// \param Nonrecursive should be true to indicate that the caller knows that 5325/// this call is non-recursive, and therefore the globally-visible declarations 5326/// will not be placed onto the pending queue. 5327void 5328ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 5329 const SmallVectorImpl<uint32_t> &DeclIDs, 5330 bool Nonrecursive) { 5331 if (NumCurrentElementsDeserializing && !Nonrecursive) { 5332 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 5333 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 5334 PII.II = II; 5335 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 5336 return; 5337 } 5338 5339 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 5340 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 5341 if (SemaObj) { 5342 // Introduce this declaration into the translation-unit scope 5343 // and add it to the declaration chain for this identifier, so 5344 // that (unqualified) name lookup will find it. 5345 SemaObj->pushExternalDeclIntoScope(D, II); 5346 } else { 5347 // Queue this declaration so that it will be added to the 5348 // translation unit scope and identifier's declaration chain 5349 // once a Sema object is known. 5350 PreloadedDecls.push_back(D); 5351 } 5352 } 5353} 5354 5355IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { 5356 if (ID == 0) 5357 return 0; 5358 5359 if (IdentifiersLoaded.empty()) { 5360 Error("no identifier table in AST file"); 5361 return 0; 5362 } 5363 5364 ID -= 1; 5365 if (!IdentifiersLoaded[ID]) { 5366 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); 5367 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); 5368 ModuleFile *M = I->second; 5369 unsigned Index = ID - M->BaseIdentifierID; 5370 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; 5371 5372 // All of the strings in the AST file are preceded by a 16-bit length. 5373 // Extract that 16-bit length to avoid having to execute strlen(). 5374 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 5375 // unsigned integers. This is important to avoid integer overflow when 5376 // we cast them to 'unsigned'. 5377 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 5378 unsigned StrLen = (((unsigned) StrLenPtr[0]) 5379 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 5380 IdentifiersLoaded[ID] 5381 = &PP.getIdentifierTable().get(StringRef(Str, StrLen)); 5382 if (DeserializationListener) 5383 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 5384 } 5385 5386 return IdentifiersLoaded[ID]; 5387} 5388 5389IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) { 5390 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); 5391} 5392 5393IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) { 5394 if (LocalID < NUM_PREDEF_IDENT_IDS) 5395 return LocalID; 5396 5397 ContinuousRangeMap<uint32_t, int, 2>::iterator I 5398 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); 5399 assert(I != M.IdentifierRemap.end() 5400 && "Invalid index into identifier index remap"); 5401 5402 return LocalID + I->second; 5403} 5404 5405bool ASTReader::ReadSLocEntry(int ID) { 5406 return ReadSLocEntryRecord(ID) != Success; 5407} 5408 5409serialization::SubmoduleID 5410ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) { 5411 if (LocalID < NUM_PREDEF_SUBMODULE_IDS) 5412 return LocalID; 5413 5414 ContinuousRangeMap<uint32_t, int, 2>::iterator I 5415 = M.SubmoduleRemap.find(LocalID - NUM_PREDEF_SUBMODULE_IDS); 5416 assert(I != M.SubmoduleRemap.end() 5417 && "Invalid index into identifier index remap"); 5418 5419 return LocalID + I->second; 5420} 5421 5422Module *ASTReader::getSubmodule(SubmoduleID GlobalID) { 5423 if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) { 5424 assert(GlobalID == 0 && "Unhandled global submodule ID"); 5425 return 0; 5426 } 5427 5428 if (GlobalID > SubmodulesLoaded.size()) { 5429 Error("submodule ID out of range in AST file"); 5430 return 0; 5431 } 5432 5433 return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS]; 5434} 5435 5436Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) { 5437 return DecodeSelector(getGlobalSelectorID(M, LocalID)); 5438} 5439 5440Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { 5441 if (ID == 0) 5442 return Selector(); 5443 5444 if (ID > SelectorsLoaded.size()) { 5445 Error("selector ID out of range in AST file"); 5446 return Selector(); 5447 } 5448 5449 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 5450 // Load this selector from the selector table. 5451 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); 5452 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); 5453 ModuleFile &M = *I->second; 5454 ASTSelectorLookupTrait Trait(*this, M); 5455 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; 5456 SelectorsLoaded[ID - 1] = 5457 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); 5458 if (DeserializationListener) 5459 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 5460 } 5461 5462 return SelectorsLoaded[ID - 1]; 5463} 5464 5465Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { 5466 return DecodeSelector(ID); 5467} 5468 5469uint32_t ASTReader::GetNumExternalSelectors() { 5470 // ID 0 (the null selector) is considered an external selector. 5471 return getTotalNumSelectors() + 1; 5472} 5473 5474serialization::SelectorID 5475ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const { 5476 if (LocalID < NUM_PREDEF_SELECTOR_IDS) 5477 return LocalID; 5478 5479 ContinuousRangeMap<uint32_t, int, 2>::iterator I 5480 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); 5481 assert(I != M.SelectorRemap.end() 5482 && "Invalid index into identifier index remap"); 5483 5484 return LocalID + I->second; 5485} 5486 5487DeclarationName 5488ASTReader::ReadDeclarationName(ModuleFile &F, 5489 const RecordData &Record, unsigned &Idx) { 5490 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 5491 switch (Kind) { 5492 case DeclarationName::Identifier: 5493 return DeclarationName(GetIdentifierInfo(F, Record, Idx)); 5494 5495 case DeclarationName::ObjCZeroArgSelector: 5496 case DeclarationName::ObjCOneArgSelector: 5497 case DeclarationName::ObjCMultiArgSelector: 5498 return DeclarationName(ReadSelector(F, Record, Idx)); 5499 5500 case DeclarationName::CXXConstructorName: 5501 return Context.DeclarationNames.getCXXConstructorName( 5502 Context.getCanonicalType(readType(F, Record, Idx))); 5503 5504 case DeclarationName::CXXDestructorName: 5505 return Context.DeclarationNames.getCXXDestructorName( 5506 Context.getCanonicalType(readType(F, Record, Idx))); 5507 5508 case DeclarationName::CXXConversionFunctionName: 5509 return Context.DeclarationNames.getCXXConversionFunctionName( 5510 Context.getCanonicalType(readType(F, Record, Idx))); 5511 5512 case DeclarationName::CXXOperatorName: 5513 return Context.DeclarationNames.getCXXOperatorName( 5514 (OverloadedOperatorKind)Record[Idx++]); 5515 5516 case DeclarationName::CXXLiteralOperatorName: 5517 return Context.DeclarationNames.getCXXLiteralOperatorName( 5518 GetIdentifierInfo(F, Record, Idx)); 5519 5520 case DeclarationName::CXXUsingDirective: 5521 return DeclarationName::getUsingDirectiveName(); 5522 } 5523 5524 // Required to silence GCC warning 5525 return DeclarationName(); 5526} 5527 5528void ASTReader::ReadDeclarationNameLoc(ModuleFile &F, 5529 DeclarationNameLoc &DNLoc, 5530 DeclarationName Name, 5531 const RecordData &Record, unsigned &Idx) { 5532 switch (Name.getNameKind()) { 5533 case DeclarationName::CXXConstructorName: 5534 case DeclarationName::CXXDestructorName: 5535 case DeclarationName::CXXConversionFunctionName: 5536 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 5537 break; 5538 5539 case DeclarationName::CXXOperatorName: 5540 DNLoc.CXXOperatorName.BeginOpNameLoc 5541 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5542 DNLoc.CXXOperatorName.EndOpNameLoc 5543 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5544 break; 5545 5546 case DeclarationName::CXXLiteralOperatorName: 5547 DNLoc.CXXLiteralOperatorName.OpNameLoc 5548 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5549 break; 5550 5551 case DeclarationName::Identifier: 5552 case DeclarationName::ObjCZeroArgSelector: 5553 case DeclarationName::ObjCOneArgSelector: 5554 case DeclarationName::ObjCMultiArgSelector: 5555 case DeclarationName::CXXUsingDirective: 5556 break; 5557 } 5558} 5559 5560void ASTReader::ReadDeclarationNameInfo(ModuleFile &F, 5561 DeclarationNameInfo &NameInfo, 5562 const RecordData &Record, unsigned &Idx) { 5563 NameInfo.setName(ReadDeclarationName(F, Record, Idx)); 5564 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 5565 DeclarationNameLoc DNLoc; 5566 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 5567 NameInfo.setInfo(DNLoc); 5568} 5569 5570void ASTReader::ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info, 5571 const RecordData &Record, unsigned &Idx) { 5572 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 5573 unsigned NumTPLists = Record[Idx++]; 5574 Info.NumTemplParamLists = NumTPLists; 5575 if (NumTPLists) { 5576 Info.TemplParamLists = new (Context) TemplateParameterList*[NumTPLists]; 5577 for (unsigned i=0; i != NumTPLists; ++i) 5578 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 5579 } 5580} 5581 5582TemplateName 5583ASTReader::ReadTemplateName(ModuleFile &F, const RecordData &Record, 5584 unsigned &Idx) { 5585 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 5586 switch (Kind) { 5587 case TemplateName::Template: 5588 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); 5589 5590 case TemplateName::OverloadedTemplate: { 5591 unsigned size = Record[Idx++]; 5592 UnresolvedSet<8> Decls; 5593 while (size--) 5594 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5595 5596 return Context.getOverloadedTemplateName(Decls.begin(), Decls.end()); 5597 } 5598 5599 case TemplateName::QualifiedTemplate: { 5600 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5601 bool hasTemplKeyword = Record[Idx++]; 5602 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); 5603 return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 5604 } 5605 5606 case TemplateName::DependentTemplate: { 5607 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5608 if (Record[Idx++]) // isIdentifier 5609 return Context.getDependentTemplateName(NNS, 5610 GetIdentifierInfo(F, Record, 5611 Idx)); 5612 return Context.getDependentTemplateName(NNS, 5613 (OverloadedOperatorKind)Record[Idx++]); 5614 } 5615 5616 case TemplateName::SubstTemplateTemplateParm: { 5617 TemplateTemplateParmDecl *param 5618 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5619 if (!param) return TemplateName(); 5620 TemplateName replacement = ReadTemplateName(F, Record, Idx); 5621 return Context.getSubstTemplateTemplateParm(param, replacement); 5622 } 5623 5624 case TemplateName::SubstTemplateTemplateParmPack: { 5625 TemplateTemplateParmDecl *Param 5626 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5627 if (!Param) 5628 return TemplateName(); 5629 5630 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 5631 if (ArgPack.getKind() != TemplateArgument::Pack) 5632 return TemplateName(); 5633 5634 return Context.getSubstTemplateTemplateParmPack(Param, ArgPack); 5635 } 5636 } 5637 5638 llvm_unreachable("Unhandled template name kind!"); 5639} 5640 5641TemplateArgument 5642ASTReader::ReadTemplateArgument(ModuleFile &F, 5643 const RecordData &Record, unsigned &Idx) { 5644 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 5645 switch (Kind) { 5646 case TemplateArgument::Null: 5647 return TemplateArgument(); 5648 case TemplateArgument::Type: 5649 return TemplateArgument(readType(F, Record, Idx)); 5650 case TemplateArgument::Declaration: 5651 return TemplateArgument(ReadDecl(F, Record, Idx)); 5652 case TemplateArgument::Integral: { 5653 llvm::APSInt Value = ReadAPSInt(Record, Idx); 5654 QualType T = readType(F, Record, Idx); 5655 return TemplateArgument(Value, T); 5656 } 5657 case TemplateArgument::Template: 5658 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 5659 case TemplateArgument::TemplateExpansion: { 5660 TemplateName Name = ReadTemplateName(F, Record, Idx); 5661 llvm::Optional<unsigned> NumTemplateExpansions; 5662 if (unsigned NumExpansions = Record[Idx++]) 5663 NumTemplateExpansions = NumExpansions - 1; 5664 return TemplateArgument(Name, NumTemplateExpansions); 5665 } 5666 case TemplateArgument::Expression: 5667 return TemplateArgument(ReadExpr(F)); 5668 case TemplateArgument::Pack: { 5669 unsigned NumArgs = Record[Idx++]; 5670 TemplateArgument *Args = new (Context) TemplateArgument[NumArgs]; 5671 for (unsigned I = 0; I != NumArgs; ++I) 5672 Args[I] = ReadTemplateArgument(F, Record, Idx); 5673 return TemplateArgument(Args, NumArgs); 5674 } 5675 } 5676 5677 llvm_unreachable("Unhandled template argument kind!"); 5678} 5679 5680TemplateParameterList * 5681ASTReader::ReadTemplateParameterList(ModuleFile &F, 5682 const RecordData &Record, unsigned &Idx) { 5683 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 5684 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 5685 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 5686 5687 unsigned NumParams = Record[Idx++]; 5688 SmallVector<NamedDecl *, 16> Params; 5689 Params.reserve(NumParams); 5690 while (NumParams--) 5691 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5692 5693 TemplateParameterList* TemplateParams = 5694 TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc, 5695 Params.data(), Params.size(), RAngleLoc); 5696 return TemplateParams; 5697} 5698 5699void 5700ASTReader:: 5701ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs, 5702 ModuleFile &F, const RecordData &Record, 5703 unsigned &Idx) { 5704 unsigned NumTemplateArgs = Record[Idx++]; 5705 TemplArgs.reserve(NumTemplateArgs); 5706 while (NumTemplateArgs--) 5707 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 5708} 5709 5710/// \brief Read a UnresolvedSet structure. 5711void ASTReader::ReadUnresolvedSet(ModuleFile &F, UnresolvedSetImpl &Set, 5712 const RecordData &Record, unsigned &Idx) { 5713 unsigned NumDecls = Record[Idx++]; 5714 while (NumDecls--) { 5715 NamedDecl *D = ReadDeclAs<NamedDecl>(F, Record, Idx); 5716 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 5717 Set.addDecl(D, AS); 5718 } 5719} 5720 5721CXXBaseSpecifier 5722ASTReader::ReadCXXBaseSpecifier(ModuleFile &F, 5723 const RecordData &Record, unsigned &Idx) { 5724 bool isVirtual = static_cast<bool>(Record[Idx++]); 5725 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 5726 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 5727 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 5728 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 5729 SourceRange Range = ReadSourceRange(F, Record, Idx); 5730 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 5731 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 5732 EllipsisLoc); 5733 Result.setInheritConstructors(inheritConstructors); 5734 return Result; 5735} 5736 5737std::pair<CXXCtorInitializer **, unsigned> 5738ASTReader::ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record, 5739 unsigned &Idx) { 5740 CXXCtorInitializer **CtorInitializers = 0; 5741 unsigned NumInitializers = Record[Idx++]; 5742 if (NumInitializers) { 5743 CtorInitializers 5744 = new (Context) CXXCtorInitializer*[NumInitializers]; 5745 for (unsigned i=0; i != NumInitializers; ++i) { 5746 TypeSourceInfo *TInfo = 0; 5747 bool IsBaseVirtual = false; 5748 FieldDecl *Member = 0; 5749 IndirectFieldDecl *IndirectMember = 0; 5750 5751 CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; 5752 switch (Type) { 5753 case CTOR_INITIALIZER_BASE: 5754 TInfo = GetTypeSourceInfo(F, Record, Idx); 5755 IsBaseVirtual = Record[Idx++]; 5756 break; 5757 5758 case CTOR_INITIALIZER_DELEGATING: 5759 TInfo = GetTypeSourceInfo(F, Record, Idx); 5760 break; 5761 5762 case CTOR_INITIALIZER_MEMBER: 5763 Member = ReadDeclAs<FieldDecl>(F, Record, Idx); 5764 break; 5765 5766 case CTOR_INITIALIZER_INDIRECT_MEMBER: 5767 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); 5768 break; 5769 } 5770 5771 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 5772 Expr *Init = ReadExpr(F); 5773 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 5774 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 5775 bool IsWritten = Record[Idx++]; 5776 unsigned SourceOrderOrNumArrayIndices; 5777 SmallVector<VarDecl *, 8> Indices; 5778 if (IsWritten) { 5779 SourceOrderOrNumArrayIndices = Record[Idx++]; 5780 } else { 5781 SourceOrderOrNumArrayIndices = Record[Idx++]; 5782 Indices.reserve(SourceOrderOrNumArrayIndices); 5783 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 5784 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); 5785 } 5786 5787 CXXCtorInitializer *BOMInit; 5788 if (Type == CTOR_INITIALIZER_BASE) { 5789 BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, IsBaseVirtual, 5790 LParenLoc, Init, RParenLoc, 5791 MemberOrEllipsisLoc); 5792 } else if (Type == CTOR_INITIALIZER_DELEGATING) { 5793 BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, LParenLoc, 5794 Init, RParenLoc); 5795 } else if (IsWritten) { 5796 if (Member) 5797 BOMInit = new (Context) CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, 5798 LParenLoc, Init, RParenLoc); 5799 else 5800 BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember, 5801 MemberOrEllipsisLoc, LParenLoc, 5802 Init, RParenLoc); 5803 } else { 5804 BOMInit = CXXCtorInitializer::Create(Context, Member, MemberOrEllipsisLoc, 5805 LParenLoc, Init, RParenLoc, 5806 Indices.data(), Indices.size()); 5807 } 5808 5809 if (IsWritten) 5810 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 5811 CtorInitializers[i] = BOMInit; 5812 } 5813 } 5814 5815 return std::make_pair(CtorInitializers, NumInitializers); 5816} 5817 5818NestedNameSpecifier * 5819ASTReader::ReadNestedNameSpecifier(ModuleFile &F, 5820 const RecordData &Record, unsigned &Idx) { 5821 unsigned N = Record[Idx++]; 5822 NestedNameSpecifier *NNS = 0, *Prev = 0; 5823 for (unsigned I = 0; I != N; ++I) { 5824 NestedNameSpecifier::SpecifierKind Kind 5825 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5826 switch (Kind) { 5827 case NestedNameSpecifier::Identifier: { 5828 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5829 NNS = NestedNameSpecifier::Create(Context, Prev, II); 5830 break; 5831 } 5832 5833 case NestedNameSpecifier::Namespace: { 5834 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5835 NNS = NestedNameSpecifier::Create(Context, Prev, NS); 5836 break; 5837 } 5838 5839 case NestedNameSpecifier::NamespaceAlias: { 5840 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5841 NNS = NestedNameSpecifier::Create(Context, Prev, Alias); 5842 break; 5843 } 5844 5845 case NestedNameSpecifier::TypeSpec: 5846 case NestedNameSpecifier::TypeSpecWithTemplate: { 5847 const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); 5848 if (!T) 5849 return 0; 5850 5851 bool Template = Record[Idx++]; 5852 NNS = NestedNameSpecifier::Create(Context, Prev, Template, T); 5853 break; 5854 } 5855 5856 case NestedNameSpecifier::Global: { 5857 NNS = NestedNameSpecifier::GlobalSpecifier(Context); 5858 // No associated value, and there can't be a prefix. 5859 break; 5860 } 5861 } 5862 Prev = NNS; 5863 } 5864 return NNS; 5865} 5866 5867NestedNameSpecifierLoc 5868ASTReader::ReadNestedNameSpecifierLoc(ModuleFile &F, const RecordData &Record, 5869 unsigned &Idx) { 5870 unsigned N = Record[Idx++]; 5871 NestedNameSpecifierLocBuilder Builder; 5872 for (unsigned I = 0; I != N; ++I) { 5873 NestedNameSpecifier::SpecifierKind Kind 5874 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5875 switch (Kind) { 5876 case NestedNameSpecifier::Identifier: { 5877 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5878 SourceRange Range = ReadSourceRange(F, Record, Idx); 5879 Builder.Extend(Context, II, Range.getBegin(), Range.getEnd()); 5880 break; 5881 } 5882 5883 case NestedNameSpecifier::Namespace: { 5884 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5885 SourceRange Range = ReadSourceRange(F, Record, Idx); 5886 Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd()); 5887 break; 5888 } 5889 5890 case NestedNameSpecifier::NamespaceAlias: { 5891 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5892 SourceRange Range = ReadSourceRange(F, Record, Idx); 5893 Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd()); 5894 break; 5895 } 5896 5897 case NestedNameSpecifier::TypeSpec: 5898 case NestedNameSpecifier::TypeSpecWithTemplate: { 5899 bool Template = Record[Idx++]; 5900 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 5901 if (!T) 5902 return NestedNameSpecifierLoc(); 5903 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5904 5905 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 5906 Builder.Extend(Context, 5907 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 5908 T->getTypeLoc(), ColonColonLoc); 5909 break; 5910 } 5911 5912 case NestedNameSpecifier::Global: { 5913 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5914 Builder.MakeGlobal(Context, ColonColonLoc); 5915 break; 5916 } 5917 } 5918 } 5919 5920 return Builder.getWithLocInContext(Context); 5921} 5922 5923SourceRange 5924ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record, 5925 unsigned &Idx) { 5926 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 5927 SourceLocation end = ReadSourceLocation(F, Record, Idx); 5928 return SourceRange(beg, end); 5929} 5930 5931/// \brief Read an integral value 5932llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 5933 unsigned BitWidth = Record[Idx++]; 5934 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 5935 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 5936 Idx += NumWords; 5937 return Result; 5938} 5939 5940/// \brief Read a signed integral value 5941llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 5942 bool isUnsigned = Record[Idx++]; 5943 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 5944} 5945 5946/// \brief Read a floating-point value 5947llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 5948 return llvm::APFloat(ReadAPInt(Record, Idx)); 5949} 5950 5951// \brief Read a string 5952std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 5953 unsigned Len = Record[Idx++]; 5954 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 5955 Idx += Len; 5956 return Result; 5957} 5958 5959VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, 5960 unsigned &Idx) { 5961 unsigned Major = Record[Idx++]; 5962 unsigned Minor = Record[Idx++]; 5963 unsigned Subminor = Record[Idx++]; 5964 if (Minor == 0) 5965 return VersionTuple(Major); 5966 if (Subminor == 0) 5967 return VersionTuple(Major, Minor - 1); 5968 return VersionTuple(Major, Minor - 1, Subminor - 1); 5969} 5970 5971CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F, 5972 const RecordData &Record, 5973 unsigned &Idx) { 5974 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); 5975 return CXXTemporary::Create(Context, Decl); 5976} 5977 5978DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 5979 return Diag(SourceLocation(), DiagID); 5980} 5981 5982DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 5983 return Diags.Report(Loc, DiagID); 5984} 5985 5986/// \brief Retrieve the identifier table associated with the 5987/// preprocessor. 5988IdentifierTable &ASTReader::getIdentifierTable() { 5989 return PP.getIdentifierTable(); 5990} 5991 5992/// \brief Record that the given ID maps to the given switch-case 5993/// statement. 5994void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 5995 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 5996 SwitchCaseStmts[ID] = SC; 5997} 5998 5999/// \brief Retrieve the switch-case statement with the given ID. 6000SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 6001 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 6002 return SwitchCaseStmts[ID]; 6003} 6004 6005void ASTReader::ClearSwitchCaseIDs() { 6006 SwitchCaseStmts.clear(); 6007} 6008 6009void ASTReader::FinishedDeserializing() { 6010 assert(NumCurrentElementsDeserializing && 6011 "FinishedDeserializing not paired with StartedDeserializing"); 6012 if (NumCurrentElementsDeserializing == 1) { 6013 do { 6014 // If any identifiers with corresponding top-level declarations have 6015 // been loaded, load those declarations now. 6016 while (!PendingIdentifierInfos.empty()) { 6017 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 6018 PendingIdentifierInfos.front().DeclIDs, true); 6019 PendingIdentifierInfos.pop_front(); 6020 } 6021 6022 // Ready to load previous declarations of Decls that were delayed. 6023 while (!PendingPreviousDecls.empty()) { 6024 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 6025 PendingPreviousDecls.front().second); 6026 PendingPreviousDecls.pop_front(); 6027 } 6028 6029 for (std::vector<std::pair<ObjCInterfaceDecl *, 6030 serialization::DeclID> >::iterator 6031 I = PendingChainedObjCCategories.begin(), 6032 E = PendingChainedObjCCategories.end(); I != E; ++I) { 6033 loadObjCChainedCategories(I->second, I->first); 6034 } 6035 PendingChainedObjCCategories.clear(); 6036 6037 // We are not in recursive loading, so it's safe to pass the "interesting" 6038 // decls to the consumer. 6039 if (Consumer && !InterestingDecls.empty()) { 6040 Decl *D = InterestingDecls.front(); 6041 InterestingDecls.pop_front(); 6042 6043 PassInterestingDeclToConsumer(D); 6044 } 6045 6046 } while ((Consumer && !InterestingDecls.empty()) || 6047 !PendingIdentifierInfos.empty() || 6048 !PendingPreviousDecls.empty() || 6049 !PendingChainedObjCCategories.empty()); 6050 6051 assert(PendingForwardRefs.size() == 0 && 6052 "Some forward refs did not get linked to the definition!"); 6053 } 6054 --NumCurrentElementsDeserializing; 6055} 6056 6057ASTReader::ASTReader(Preprocessor &PP, ASTContext &Context, 6058 StringRef isysroot, bool DisableValidation, 6059 bool DisableStatCache) 6060 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 6061 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 6062 Diags(PP.getDiagnostics()), SemaObj(0), PP(PP), Context(Context), 6063 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 6064 RelocatablePCH(false), isysroot(isysroot), 6065 DisableValidation(DisableValidation), 6066 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 6067 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 6068 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 6069 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 6070 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 6071 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 6072 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 6073 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), 6074 NumCXXBaseSpecifiersLoaded(0) 6075{ 6076 SourceMgr.setExternalSLocEntrySource(this); 6077} 6078 6079ASTReader::~ASTReader() { 6080 for (DeclContextVisibleUpdatesPending::iterator 6081 I = PendingVisibleUpdates.begin(), 6082 E = PendingVisibleUpdates.end(); 6083 I != E; ++I) { 6084 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 6085 F = I->second.end(); 6086 J != F; ++J) 6087 delete static_cast<ASTDeclContextNameLookupTable*>(J->first); 6088 } 6089} 6090