ASTReader.cpp revision 44cd9f9d686dfdb9ad16113c41c2dca1da35a646
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 "ASTCommon.h" 17#include "clang/Frontend/FrontendDiagnostic.h" 18#include "clang/Frontend/Utils.h" 19#include "clang/Sema/Sema.h" 20#include "clang/Sema/Scope.h" 21#include "clang/AST/ASTConsumer.h" 22#include "clang/AST/ASTContext.h" 23#include "clang/AST/DeclTemplate.h" 24#include "clang/AST/Expr.h" 25#include "clang/AST/ExprCXX.h" 26#include "clang/AST/NestedNameSpecifier.h" 27#include "clang/AST/Type.h" 28#include "clang/AST/TypeLocVisitor.h" 29#include "clang/Lex/MacroInfo.h" 30#include "clang/Lex/PreprocessingRecord.h" 31#include "clang/Lex/Preprocessor.h" 32#include "clang/Lex/HeaderSearch.h" 33#include "clang/Basic/OnDiskHashTable.h" 34#include "clang/Basic/SourceManager.h" 35#include "clang/Basic/SourceManagerInternals.h" 36#include "clang/Basic/FileManager.h" 37#include "clang/Basic/FileSystemStatCache.h" 38#include "clang/Basic/TargetInfo.h" 39#include "clang/Basic/Version.h" 40#include "llvm/ADT/StringExtras.h" 41#include "llvm/Bitcode/BitstreamReader.h" 42#include "llvm/Support/MemoryBuffer.h" 43#include "llvm/Support/ErrorHandling.h" 44#include "llvm/Support/FileSystem.h" 45#include "llvm/Support/Path.h" 46#include "llvm/Support/system_error.h" 47#include <algorithm> 48#include <iterator> 49#include <cstdio> 50#include <sys/stat.h> 51 52using namespace clang; 53using namespace clang::serialization; 54 55//===----------------------------------------------------------------------===// 56// PCH validator implementation 57//===----------------------------------------------------------------------===// 58 59ASTReaderListener::~ASTReaderListener() {} 60 61bool 62PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) { 63 const LangOptions &PPLangOpts = PP.getLangOptions(); 64#define PARSE_LANGOPT_BENIGN(Option) 65#define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \ 66 if (PPLangOpts.Option != LangOpts.Option) { \ 67 Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \ 68 return true; \ 69 } 70 71 PARSE_LANGOPT_BENIGN(Trigraphs); 72 PARSE_LANGOPT_BENIGN(BCPLComment); 73 PARSE_LANGOPT_BENIGN(DollarIdents); 74 PARSE_LANGOPT_BENIGN(AsmPreprocessor); 75 PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions); 76 PARSE_LANGOPT_IMPORTANT(GNUKeywords, diag::warn_pch_gnu_keywords); 77 PARSE_LANGOPT_BENIGN(ImplicitInt); 78 PARSE_LANGOPT_BENIGN(Digraphs); 79 PARSE_LANGOPT_BENIGN(HexFloats); 80 PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99); 81 PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions); 82 PARSE_LANGOPT_BENIGN(MSCVersion); 83 PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus); 84 PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x); 85 PARSE_LANGOPT_BENIGN(CXXOperatorName); 86 PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c); 87 PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2); 88 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi); 89 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI2, diag::warn_pch_nonfragile_abi2); 90 PARSE_LANGOPT_IMPORTANT(AppleKext, diag::warn_pch_apple_kext); 91 PARSE_LANGOPT_IMPORTANT(ObjCDefaultSynthProperties, 92 diag::warn_pch_objc_auto_properties); 93 PARSE_LANGOPT_IMPORTANT(NoConstantCFStrings, 94 diag::warn_pch_no_constant_cfstrings); 95 PARSE_LANGOPT_BENIGN(PascalStrings); 96 PARSE_LANGOPT_BENIGN(WritableStrings); 97 PARSE_LANGOPT_IMPORTANT(LaxVectorConversions, 98 diag::warn_pch_lax_vector_conversions); 99 PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec); 100 PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions); 101 PARSE_LANGOPT_IMPORTANT(ObjCExceptions, diag::warn_pch_objc_exceptions); 102 PARSE_LANGOPT_IMPORTANT(CXXExceptions, diag::warn_pch_cxx_exceptions); 103 PARSE_LANGOPT_IMPORTANT(SjLjExceptions, diag::warn_pch_sjlj_exceptions); 104 PARSE_LANGOPT_IMPORTANT(MSBitfields, diag::warn_pch_ms_bitfields); 105 PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime); 106 PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding); 107 PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins); 108 PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics, 109 diag::warn_pch_thread_safe_statics); 110 PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads); 111 PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks); 112 PARSE_LANGOPT_BENIGN(EmitAllDecls); 113 PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno); 114 PARSE_LANGOPT_BENIGN(getSignedOverflowBehavior()); 115 PARSE_LANGOPT_IMPORTANT(HeinousExtensions, 116 diag::warn_pch_heinous_extensions); 117 // FIXME: Most of the options below are benign if the macro wasn't 118 // used. Unfortunately, this means that a PCH compiled without 119 // optimization can't be used with optimization turned on, even 120 // though the only thing that changes is whether __OPTIMIZE__ was 121 // defined... but if __OPTIMIZE__ never showed up in the header, it 122 // doesn't matter. We could consider making this some special kind 123 // of check. 124 PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize); 125 PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size); 126 PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static); 127 PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level); 128 PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline); 129 PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline); 130 PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control); 131 PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed); 132 PARSE_LANGOPT_IMPORTANT(ShortWChar, diag::warn_pch_short_wchar); 133 PARSE_LANGOPT_IMPORTANT(ShortEnums, diag::warn_pch_short_enums); 134 if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) { 135 Reader.Diag(diag::warn_pch_gc_mode) 136 << LangOpts.getGCMode() << PPLangOpts.getGCMode(); 137 return true; 138 } 139 PARSE_LANGOPT_BENIGN(getVisibilityMode()); 140 PARSE_LANGOPT_IMPORTANT(getStackProtectorMode(), 141 diag::warn_pch_stack_protector); 142 PARSE_LANGOPT_BENIGN(InstantiationDepth); 143 PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl); 144 PARSE_LANGOPT_IMPORTANT(CUDA, diag::warn_pch_cuda); 145 PARSE_LANGOPT_BENIGN(CatchUndefined); 146 PARSE_LANGOPT_IMPORTANT(ElideConstructors, diag::warn_pch_elide_constructors); 147 PARSE_LANGOPT_BENIGN(SpellChecking); 148 PARSE_LANGOPT_BENIGN(DefaultFPContract); 149#undef PARSE_LANGOPT_IMPORTANT 150#undef PARSE_LANGOPT_BENIGN 151 152 return false; 153} 154 155bool PCHValidator::ReadTargetTriple(llvm::StringRef Triple) { 156 if (Triple == PP.getTargetInfo().getTriple().str()) 157 return false; 158 159 Reader.Diag(diag::warn_pch_target_triple) 160 << Triple << PP.getTargetInfo().getTriple().str(); 161 return true; 162} 163 164namespace { 165 struct EmptyStringRef { 166 bool operator ()(llvm::StringRef r) const { return r.empty(); } 167 }; 168 struct EmptyBlock { 169 bool operator ()(const PCHPredefinesBlock &r) const {return r.Data.empty();} 170 }; 171} 172 173static bool EqualConcatenations(llvm::SmallVector<llvm::StringRef, 2> L, 174 PCHPredefinesBlocks R) { 175 // First, sum up the lengths. 176 unsigned LL = 0, RL = 0; 177 for (unsigned I = 0, N = L.size(); I != N; ++I) { 178 LL += L[I].size(); 179 } 180 for (unsigned I = 0, N = R.size(); I != N; ++I) { 181 RL += R[I].Data.size(); 182 } 183 if (LL != RL) 184 return false; 185 if (LL == 0 && RL == 0) 186 return true; 187 188 // Kick out empty parts, they confuse the algorithm below. 189 L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end()); 190 R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end()); 191 192 // Do it the hard way. At this point, both vectors must be non-empty. 193 llvm::StringRef LR = L[0], RR = R[0].Data; 194 unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size(); 195 (void) RN; 196 for (;;) { 197 // Compare the current pieces. 198 if (LR.size() == RR.size()) { 199 // If they're the same length, it's pretty easy. 200 if (LR != RR) 201 return false; 202 // Both pieces are done, advance. 203 ++LI; 204 ++RI; 205 // If either string is done, they're both done, since they're the same 206 // length. 207 if (LI == LN) { 208 assert(RI == RN && "Strings not the same length after all?"); 209 return true; 210 } 211 LR = L[LI]; 212 RR = R[RI].Data; 213 } else if (LR.size() < RR.size()) { 214 // Right piece is longer. 215 if (!RR.startswith(LR)) 216 return false; 217 ++LI; 218 assert(LI != LN && "Strings not the same length after all?"); 219 RR = RR.substr(LR.size()); 220 LR = L[LI]; 221 } else { 222 // Left piece is longer. 223 if (!LR.startswith(RR)) 224 return false; 225 ++RI; 226 assert(RI != RN && "Strings not the same length after all?"); 227 LR = LR.substr(RR.size()); 228 RR = R[RI].Data; 229 } 230 } 231} 232 233static std::pair<FileID, llvm::StringRef::size_type> 234FindMacro(const PCHPredefinesBlocks &Buffers, llvm::StringRef MacroDef) { 235 std::pair<FileID, llvm::StringRef::size_type> Res; 236 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) { 237 Res.second = Buffers[I].Data.find(MacroDef); 238 if (Res.second != llvm::StringRef::npos) { 239 Res.first = Buffers[I].BufferID; 240 break; 241 } 242 } 243 return Res; 244} 245 246bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, 247 llvm::StringRef OriginalFileName, 248 std::string &SuggestedPredefines, 249 FileManager &FileMgr) { 250 // We are in the context of an implicit include, so the predefines buffer will 251 // have a #include entry for the PCH file itself (as normalized by the 252 // preprocessor initialization). Find it and skip over it in the checking 253 // below. 254 llvm::SmallString<256> PCHInclude; 255 PCHInclude += "#include \""; 256 PCHInclude += NormalizeDashIncludePath(OriginalFileName, FileMgr); 257 PCHInclude += "\"\n"; 258 std::pair<llvm::StringRef,llvm::StringRef> Split = 259 llvm::StringRef(PP.getPredefines()).split(PCHInclude.str()); 260 llvm::StringRef Left = Split.first, Right = Split.second; 261 if (Left == PP.getPredefines()) { 262 Error("Missing PCH include entry!"); 263 return true; 264 } 265 266 // If the concatenation of all the PCH buffers is equal to the adjusted 267 // command line, we're done. 268 llvm::SmallVector<llvm::StringRef, 2> CommandLine; 269 CommandLine.push_back(Left); 270 CommandLine.push_back(Right); 271 if (EqualConcatenations(CommandLine, Buffers)) 272 return false; 273 274 SourceManager &SourceMgr = PP.getSourceManager(); 275 276 // The predefines buffers are different. Determine what the differences are, 277 // and whether they require us to reject the PCH file. 278 llvm::SmallVector<llvm::StringRef, 8> PCHLines; 279 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) 280 Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 281 282 llvm::SmallVector<llvm::StringRef, 8> CmdLineLines; 283 Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 284 285 // Pick out implicit #includes after the PCH and don't consider them for 286 // validation; we will insert them into SuggestedPredefines so that the 287 // preprocessor includes them. 288 std::string IncludesAfterPCH; 289 llvm::SmallVector<llvm::StringRef, 8> AfterPCHLines; 290 Right.split(AfterPCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 291 for (unsigned i = 0, e = AfterPCHLines.size(); i != e; ++i) { 292 if (AfterPCHLines[i].startswith("#include ")) { 293 IncludesAfterPCH += AfterPCHLines[i]; 294 IncludesAfterPCH += '\n'; 295 } else { 296 CmdLineLines.push_back(AfterPCHLines[i]); 297 } 298 } 299 300 // Make sure we add the includes last into SuggestedPredefines before we 301 // exit this function. 302 struct AddIncludesRAII { 303 std::string &SuggestedPredefines; 304 std::string &IncludesAfterPCH; 305 306 AddIncludesRAII(std::string &SuggestedPredefines, 307 std::string &IncludesAfterPCH) 308 : SuggestedPredefines(SuggestedPredefines), 309 IncludesAfterPCH(IncludesAfterPCH) { } 310 ~AddIncludesRAII() { 311 SuggestedPredefines += IncludesAfterPCH; 312 } 313 } AddIncludes(SuggestedPredefines, IncludesAfterPCH); 314 315 // Sort both sets of predefined buffer lines, since we allow some extra 316 // definitions and they may appear at any point in the output. 317 std::sort(CmdLineLines.begin(), CmdLineLines.end()); 318 std::sort(PCHLines.begin(), PCHLines.end()); 319 320 // Determine which predefines that were used to build the PCH file are missing 321 // from the command line. 322 std::vector<llvm::StringRef> MissingPredefines; 323 std::set_difference(PCHLines.begin(), PCHLines.end(), 324 CmdLineLines.begin(), CmdLineLines.end(), 325 std::back_inserter(MissingPredefines)); 326 327 bool MissingDefines = false; 328 bool ConflictingDefines = false; 329 for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) { 330 llvm::StringRef Missing = MissingPredefines[I]; 331 if (Missing.startswith("#include ")) { 332 // An -include was specified when generating the PCH; it is included in 333 // the PCH, just ignore it. 334 continue; 335 } 336 if (!Missing.startswith("#define ")) { 337 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 338 return true; 339 } 340 341 // This is a macro definition. Determine the name of the macro we're 342 // defining. 343 std::string::size_type StartOfMacroName = strlen("#define "); 344 std::string::size_type EndOfMacroName 345 = Missing.find_first_of("( \n\r", StartOfMacroName); 346 assert(EndOfMacroName != std::string::npos && 347 "Couldn't find the end of the macro name"); 348 llvm::StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName); 349 350 // Determine whether this macro was given a different definition on the 351 // command line. 352 std::string MacroDefStart = "#define " + MacroName.str(); 353 std::string::size_type MacroDefLen = MacroDefStart.size(); 354 llvm::SmallVector<llvm::StringRef, 8>::iterator ConflictPos 355 = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(), 356 MacroDefStart); 357 for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) { 358 if (!ConflictPos->startswith(MacroDefStart)) { 359 // Different macro; we're done. 360 ConflictPos = CmdLineLines.end(); 361 break; 362 } 363 364 assert(ConflictPos->size() > MacroDefLen && 365 "Invalid #define in predefines buffer?"); 366 if ((*ConflictPos)[MacroDefLen] != ' ' && 367 (*ConflictPos)[MacroDefLen] != '(') 368 continue; // Longer macro name; keep trying. 369 370 // We found a conflicting macro definition. 371 break; 372 } 373 374 if (ConflictPos != CmdLineLines.end()) { 375 Reader.Diag(diag::warn_cmdline_conflicting_macro_def) 376 << MacroName; 377 378 // Show the definition of this macro within the PCH file. 379 std::pair<FileID, llvm::StringRef::size_type> MacroLoc = 380 FindMacro(Buffers, Missing); 381 assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!"); 382 SourceLocation PCHMissingLoc = 383 SourceMgr.getLocForStartOfFile(MacroLoc.first) 384 .getFileLocWithOffset(MacroLoc.second); 385 Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName; 386 387 ConflictingDefines = true; 388 continue; 389 } 390 391 // If the macro doesn't conflict, then we'll just pick up the macro 392 // definition from the PCH file. Warn the user that they made a mistake. 393 if (ConflictingDefines) 394 continue; // Don't complain if there are already conflicting defs 395 396 if (!MissingDefines) { 397 Reader.Diag(diag::warn_cmdline_missing_macro_defs); 398 MissingDefines = true; 399 } 400 401 // Show the definition of this macro within the PCH file. 402 std::pair<FileID, llvm::StringRef::size_type> MacroLoc = 403 FindMacro(Buffers, Missing); 404 assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!"); 405 SourceLocation PCHMissingLoc = 406 SourceMgr.getLocForStartOfFile(MacroLoc.first) 407 .getFileLocWithOffset(MacroLoc.second); 408 Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch); 409 } 410 411 if (ConflictingDefines) 412 return true; 413 414 // Determine what predefines were introduced based on command-line 415 // parameters that were not present when building the PCH 416 // file. Extra #defines are okay, so long as the identifiers being 417 // defined were not used within the precompiled header. 418 std::vector<llvm::StringRef> ExtraPredefines; 419 std::set_difference(CmdLineLines.begin(), CmdLineLines.end(), 420 PCHLines.begin(), PCHLines.end(), 421 std::back_inserter(ExtraPredefines)); 422 for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) { 423 llvm::StringRef &Extra = ExtraPredefines[I]; 424 if (!Extra.startswith("#define ")) { 425 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 426 return true; 427 } 428 429 // This is an extra macro definition. Determine the name of the 430 // macro we're defining. 431 std::string::size_type StartOfMacroName = strlen("#define "); 432 std::string::size_type EndOfMacroName 433 = Extra.find_first_of("( \n\r", StartOfMacroName); 434 assert(EndOfMacroName != std::string::npos && 435 "Couldn't find the end of the macro name"); 436 llvm::StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName); 437 438 // Check whether this name was used somewhere in the PCH file. If 439 // so, defining it as a macro could change behavior, so we reject 440 // the PCH file. 441 if (IdentifierInfo *II = Reader.get(MacroName)) { 442 Reader.Diag(diag::warn_macro_name_used_in_pch) << II; 443 return true; 444 } 445 446 // Add this definition to the suggested predefines buffer. 447 SuggestedPredefines += Extra; 448 SuggestedPredefines += '\n'; 449 } 450 451 // If we get here, it's because the predefines buffer had compatible 452 // contents. Accept the PCH file. 453 return false; 454} 455 456void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI, 457 unsigned ID) { 458 PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID); 459 ++NumHeaderInfos; 460} 461 462void PCHValidator::ReadCounter(unsigned Value) { 463 PP.setCounterValue(Value); 464} 465 466//===----------------------------------------------------------------------===// 467// AST reader implementation 468//===----------------------------------------------------------------------===// 469 470void 471ASTReader::setDeserializationListener(ASTDeserializationListener *Listener) { 472 DeserializationListener = Listener; 473} 474 475 476namespace { 477class ASTSelectorLookupTrait { 478 ASTReader &Reader; 479 480public: 481 struct data_type { 482 SelectorID ID; 483 ObjCMethodList Instance, Factory; 484 }; 485 486 typedef Selector external_key_type; 487 typedef external_key_type internal_key_type; 488 489 explicit ASTSelectorLookupTrait(ASTReader &Reader) : Reader(Reader) { } 490 491 static bool EqualKey(const internal_key_type& a, 492 const internal_key_type& b) { 493 return a == b; 494 } 495 496 static unsigned ComputeHash(Selector Sel) { 497 return serialization::ComputeHash(Sel); 498 } 499 500 // This hopefully will just get inlined and removed by the optimizer. 501 static const internal_key_type& 502 GetInternalKey(const external_key_type& x) { return x; } 503 504 static std::pair<unsigned, unsigned> 505 ReadKeyDataLength(const unsigned char*& d) { 506 using namespace clang::io; 507 unsigned KeyLen = ReadUnalignedLE16(d); 508 unsigned DataLen = ReadUnalignedLE16(d); 509 return std::make_pair(KeyLen, DataLen); 510 } 511 512 internal_key_type ReadKey(const unsigned char* d, unsigned) { 513 using namespace clang::io; 514 SelectorTable &SelTable = Reader.getContext()->Selectors; 515 unsigned N = ReadUnalignedLE16(d); 516 IdentifierInfo *FirstII 517 = Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)); 518 if (N == 0) 519 return SelTable.getNullarySelector(FirstII); 520 else if (N == 1) 521 return SelTable.getUnarySelector(FirstII); 522 523 llvm::SmallVector<IdentifierInfo *, 16> Args; 524 Args.push_back(FirstII); 525 for (unsigned I = 1; I != N; ++I) 526 Args.push_back(Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d))); 527 528 return SelTable.getSelector(N, Args.data()); 529 } 530 531 data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) { 532 using namespace clang::io; 533 534 data_type Result; 535 536 Result.ID = ReadUnalignedLE32(d); 537 unsigned NumInstanceMethods = ReadUnalignedLE16(d); 538 unsigned NumFactoryMethods = ReadUnalignedLE16(d); 539 540 // Load instance methods 541 ObjCMethodList *Prev = 0; 542 for (unsigned I = 0; I != NumInstanceMethods; ++I) { 543 ObjCMethodDecl *Method 544 = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d))); 545 if (!Result.Instance.Method) { 546 // This is the first method, which is the easy case. 547 Result.Instance.Method = Method; 548 Prev = &Result.Instance; 549 continue; 550 } 551 552 ObjCMethodList *Mem = 553 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 554 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 555 Prev = Prev->Next; 556 } 557 558 // Load factory methods 559 Prev = 0; 560 for (unsigned I = 0; I != NumFactoryMethods; ++I) { 561 ObjCMethodDecl *Method 562 = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d))); 563 if (!Result.Factory.Method) { 564 // This is the first method, which is the easy case. 565 Result.Factory.Method = Method; 566 Prev = &Result.Factory; 567 continue; 568 } 569 570 ObjCMethodList *Mem = 571 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 572 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 573 Prev = Prev->Next; 574 } 575 576 return Result; 577 } 578}; 579 580} // end anonymous namespace 581 582/// \brief The on-disk hash table used for the global method pool. 583typedef OnDiskChainedHashTable<ASTSelectorLookupTrait> 584 ASTSelectorLookupTable; 585 586namespace clang { 587class ASTIdentifierLookupTrait { 588 ASTReader &Reader; 589 ASTReader::PerFileData &F; 590 591 // If we know the IdentifierInfo in advance, it is here and we will 592 // not build a new one. Used when deserializing information about an 593 // identifier that was constructed before the AST file was read. 594 IdentifierInfo *KnownII; 595 596public: 597 typedef IdentifierInfo * data_type; 598 599 typedef const std::pair<const char*, unsigned> external_key_type; 600 601 typedef external_key_type internal_key_type; 602 603 ASTIdentifierLookupTrait(ASTReader &Reader, ASTReader::PerFileData &F, 604 IdentifierInfo *II = 0) 605 : Reader(Reader), F(F), KnownII(II) { } 606 607 static bool EqualKey(const internal_key_type& a, 608 const internal_key_type& b) { 609 return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 610 : false; 611 } 612 613 static unsigned ComputeHash(const internal_key_type& a) { 614 return llvm::HashString(llvm::StringRef(a.first, a.second)); 615 } 616 617 // This hopefully will just get inlined and removed by the optimizer. 618 static const internal_key_type& 619 GetInternalKey(const external_key_type& x) { return x; } 620 621 // This hopefully will just get inlined and removed by the optimizer. 622 static const external_key_type& 623 GetExternalKey(const internal_key_type& x) { return x; } 624 625 static std::pair<unsigned, unsigned> 626 ReadKeyDataLength(const unsigned char*& d) { 627 using namespace clang::io; 628 unsigned DataLen = ReadUnalignedLE16(d); 629 unsigned KeyLen = ReadUnalignedLE16(d); 630 return std::make_pair(KeyLen, DataLen); 631 } 632 633 static std::pair<const char*, unsigned> 634 ReadKey(const unsigned char* d, unsigned n) { 635 assert(n >= 2 && d[n-1] == '\0'); 636 return std::make_pair((const char*) d, n-1); 637 } 638 639 IdentifierInfo *ReadData(const internal_key_type& k, 640 const unsigned char* d, 641 unsigned DataLen) { 642 using namespace clang::io; 643 IdentID ID = ReadUnalignedLE32(d); 644 bool IsInteresting = ID & 0x01; 645 646 // Wipe out the "is interesting" bit. 647 ID = ID >> 1; 648 649 if (!IsInteresting) { 650 // For uninteresting identifiers, just build the IdentifierInfo 651 // and associate it with the persistent ID. 652 IdentifierInfo *II = KnownII; 653 if (!II) 654 II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second); 655 Reader.SetIdentifierInfo(ID, II); 656 II->setIsFromAST(); 657 return II; 658 } 659 660 unsigned Bits = ReadUnalignedLE16(d); 661 bool CPlusPlusOperatorKeyword = Bits & 0x01; 662 Bits >>= 1; 663 bool HasRevertedTokenIDToIdentifier = Bits & 0x01; 664 Bits >>= 1; 665 bool Poisoned = Bits & 0x01; 666 Bits >>= 1; 667 bool ExtensionToken = Bits & 0x01; 668 Bits >>= 1; 669 bool hasMacroDefinition = Bits & 0x01; 670 Bits >>= 1; 671 unsigned ObjCOrBuiltinID = Bits & 0x3FF; 672 Bits >>= 10; 673 674 assert(Bits == 0 && "Extra bits in the identifier?"); 675 DataLen -= 6; 676 677 // Build the IdentifierInfo itself and link the identifier ID with 678 // the new IdentifierInfo. 679 IdentifierInfo *II = KnownII; 680 if (!II) 681 II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second); 682 Reader.SetIdentifierInfo(ID, II); 683 684 // Set or check the various bits in the IdentifierInfo structure. 685 // Token IDs are read-only. 686 if (HasRevertedTokenIDToIdentifier) 687 II->RevertTokenIDToIdentifier(); 688 II->setObjCOrBuiltinID(ObjCOrBuiltinID); 689 assert(II->isExtensionToken() == ExtensionToken && 690 "Incorrect extension token flag"); 691 (void)ExtensionToken; 692 II->setIsPoisoned(Poisoned); 693 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && 694 "Incorrect C++ operator keyword flag"); 695 (void)CPlusPlusOperatorKeyword; 696 697 // If this identifier is a macro, deserialize the macro 698 // definition. 699 if (hasMacroDefinition) { 700 uint32_t Offset = ReadUnalignedLE32(d); 701 Reader.SetIdentifierIsMacro(II, F, Offset); 702 DataLen -= 4; 703 } 704 705 // Read all of the declarations visible at global scope with this 706 // name. 707 if (Reader.getContext() == 0) return II; 708 if (DataLen > 0) { 709 llvm::SmallVector<uint32_t, 4> DeclIDs; 710 for (; DataLen > 0; DataLen -= 4) 711 DeclIDs.push_back(ReadUnalignedLE32(d)); 712 Reader.SetGloballyVisibleDecls(II, DeclIDs); 713 } 714 715 II->setIsFromAST(); 716 return II; 717 } 718}; 719 720} // end anonymous namespace 721 722/// \brief The on-disk hash table used to contain information about 723/// all of the identifiers in the program. 724typedef OnDiskChainedHashTable<ASTIdentifierLookupTrait> 725 ASTIdentifierLookupTable; 726 727namespace { 728class ASTDeclContextNameLookupTrait { 729 ASTReader &Reader; 730 731public: 732 /// \brief Pair of begin/end iterators for DeclIDs. 733 typedef std::pair<DeclID *, DeclID *> data_type; 734 735 /// \brief Special internal key for declaration names. 736 /// The hash table creates keys for comparison; we do not create 737 /// a DeclarationName for the internal key to avoid deserializing types. 738 struct DeclNameKey { 739 DeclarationName::NameKind Kind; 740 uint64_t Data; 741 DeclNameKey() : Kind((DeclarationName::NameKind)0), Data(0) { } 742 }; 743 744 typedef DeclarationName external_key_type; 745 typedef DeclNameKey internal_key_type; 746 747 explicit ASTDeclContextNameLookupTrait(ASTReader &Reader) : Reader(Reader) { } 748 749 static bool EqualKey(const internal_key_type& a, 750 const internal_key_type& b) { 751 return a.Kind == b.Kind && a.Data == b.Data; 752 } 753 754 unsigned ComputeHash(const DeclNameKey &Key) const { 755 llvm::FoldingSetNodeID ID; 756 ID.AddInteger(Key.Kind); 757 758 switch (Key.Kind) { 759 case DeclarationName::Identifier: 760 case DeclarationName::CXXLiteralOperatorName: 761 ID.AddString(((IdentifierInfo*)Key.Data)->getName()); 762 break; 763 case DeclarationName::ObjCZeroArgSelector: 764 case DeclarationName::ObjCOneArgSelector: 765 case DeclarationName::ObjCMultiArgSelector: 766 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); 767 break; 768 case DeclarationName::CXXConstructorName: 769 case DeclarationName::CXXDestructorName: 770 case DeclarationName::CXXConversionFunctionName: 771 ID.AddInteger((TypeID)Key.Data); 772 break; 773 case DeclarationName::CXXOperatorName: 774 ID.AddInteger((OverloadedOperatorKind)Key.Data); 775 break; 776 case DeclarationName::CXXUsingDirective: 777 break; 778 } 779 780 return ID.ComputeHash(); 781 } 782 783 internal_key_type GetInternalKey(const external_key_type& Name) const { 784 DeclNameKey Key; 785 Key.Kind = Name.getNameKind(); 786 switch (Name.getNameKind()) { 787 case DeclarationName::Identifier: 788 Key.Data = (uint64_t)Name.getAsIdentifierInfo(); 789 break; 790 case DeclarationName::ObjCZeroArgSelector: 791 case DeclarationName::ObjCOneArgSelector: 792 case DeclarationName::ObjCMultiArgSelector: 793 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); 794 break; 795 case DeclarationName::CXXConstructorName: 796 case DeclarationName::CXXDestructorName: 797 case DeclarationName::CXXConversionFunctionName: 798 Key.Data = Reader.GetTypeID(Name.getCXXNameType()); 799 break; 800 case DeclarationName::CXXOperatorName: 801 Key.Data = Name.getCXXOverloadedOperator(); 802 break; 803 case DeclarationName::CXXLiteralOperatorName: 804 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); 805 break; 806 case DeclarationName::CXXUsingDirective: 807 break; 808 } 809 810 return Key; 811 } 812 813 external_key_type GetExternalKey(const internal_key_type& Key) const { 814 ASTContext *Context = Reader.getContext(); 815 switch (Key.Kind) { 816 case DeclarationName::Identifier: 817 return DeclarationName((IdentifierInfo*)Key.Data); 818 819 case DeclarationName::ObjCZeroArgSelector: 820 case DeclarationName::ObjCOneArgSelector: 821 case DeclarationName::ObjCMultiArgSelector: 822 return DeclarationName(Selector(Key.Data)); 823 824 case DeclarationName::CXXConstructorName: 825 return Context->DeclarationNames.getCXXConstructorName( 826 Context->getCanonicalType(Reader.GetType(Key.Data))); 827 828 case DeclarationName::CXXDestructorName: 829 return Context->DeclarationNames.getCXXDestructorName( 830 Context->getCanonicalType(Reader.GetType(Key.Data))); 831 832 case DeclarationName::CXXConversionFunctionName: 833 return Context->DeclarationNames.getCXXConversionFunctionName( 834 Context->getCanonicalType(Reader.GetType(Key.Data))); 835 836 case DeclarationName::CXXOperatorName: 837 return Context->DeclarationNames.getCXXOperatorName( 838 (OverloadedOperatorKind)Key.Data); 839 840 case DeclarationName::CXXLiteralOperatorName: 841 return Context->DeclarationNames.getCXXLiteralOperatorName( 842 (IdentifierInfo*)Key.Data); 843 844 case DeclarationName::CXXUsingDirective: 845 return DeclarationName::getUsingDirectiveName(); 846 } 847 848 llvm_unreachable("Invalid Name Kind ?"); 849 } 850 851 static std::pair<unsigned, unsigned> 852 ReadKeyDataLength(const unsigned char*& d) { 853 using namespace clang::io; 854 unsigned KeyLen = ReadUnalignedLE16(d); 855 unsigned DataLen = ReadUnalignedLE16(d); 856 return std::make_pair(KeyLen, DataLen); 857 } 858 859 internal_key_type ReadKey(const unsigned char* d, unsigned) { 860 using namespace clang::io; 861 862 DeclNameKey Key; 863 Key.Kind = (DeclarationName::NameKind)*d++; 864 switch (Key.Kind) { 865 case DeclarationName::Identifier: 866 Key.Data = (uint64_t)Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)); 867 break; 868 case DeclarationName::ObjCZeroArgSelector: 869 case DeclarationName::ObjCOneArgSelector: 870 case DeclarationName::ObjCMultiArgSelector: 871 Key.Data = 872 (uint64_t)Reader.DecodeSelector(ReadUnalignedLE32(d)).getAsOpaquePtr(); 873 break; 874 case DeclarationName::CXXConstructorName: 875 case DeclarationName::CXXDestructorName: 876 case DeclarationName::CXXConversionFunctionName: 877 Key.Data = ReadUnalignedLE32(d); // TypeID 878 break; 879 case DeclarationName::CXXOperatorName: 880 Key.Data = *d++; // OverloadedOperatorKind 881 break; 882 case DeclarationName::CXXLiteralOperatorName: 883 Key.Data = (uint64_t)Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)); 884 break; 885 case DeclarationName::CXXUsingDirective: 886 break; 887 } 888 889 return Key; 890 } 891 892 data_type ReadData(internal_key_type, const unsigned char* d, 893 unsigned DataLen) { 894 using namespace clang::io; 895 unsigned NumDecls = ReadUnalignedLE16(d); 896 DeclID *Start = (DeclID *)d; 897 return std::make_pair(Start, Start + NumDecls); 898 } 899}; 900 901} // end anonymous namespace 902 903/// \brief The on-disk hash table used for the DeclContext's Name lookup table. 904typedef OnDiskChainedHashTable<ASTDeclContextNameLookupTrait> 905 ASTDeclContextNameLookupTable; 906 907bool ASTReader::ReadDeclContextStorage(llvm::BitstreamCursor &Cursor, 908 const std::pair<uint64_t, uint64_t> &Offsets, 909 DeclContextInfo &Info) { 910 SavedStreamPosition SavedPosition(Cursor); 911 // First the lexical decls. 912 if (Offsets.first != 0) { 913 Cursor.JumpToBit(Offsets.first); 914 915 RecordData Record; 916 const char *Blob; 917 unsigned BlobLen; 918 unsigned Code = Cursor.ReadCode(); 919 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 920 if (RecCode != DECL_CONTEXT_LEXICAL) { 921 Error("Expected lexical block"); 922 return true; 923 } 924 925 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob); 926 Info.NumLexicalDecls = BlobLen / sizeof(KindDeclIDPair); 927 } else { 928 Info.LexicalDecls = 0; 929 Info.NumLexicalDecls = 0; 930 } 931 932 // Now the lookup table. 933 if (Offsets.second != 0) { 934 Cursor.JumpToBit(Offsets.second); 935 936 RecordData Record; 937 const char *Blob; 938 unsigned BlobLen; 939 unsigned Code = Cursor.ReadCode(); 940 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 941 if (RecCode != DECL_CONTEXT_VISIBLE) { 942 Error("Expected visible lookup table block"); 943 return true; 944 } 945 Info.NameLookupTableData 946 = ASTDeclContextNameLookupTable::Create( 947 (const unsigned char *)Blob + Record[0], 948 (const unsigned char *)Blob, 949 ASTDeclContextNameLookupTrait(*this)); 950 } else { 951 Info.NameLookupTableData = 0; 952 } 953 954 return false; 955} 956 957void ASTReader::Error(const char *Msg) { 958 Diag(diag::err_fe_pch_malformed) << Msg; 959} 960 961/// \brief Tell the AST listener about the predefines buffers in the chain. 962bool ASTReader::CheckPredefinesBuffers() { 963 if (Listener) 964 return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, 965 ActualOriginalFileName, 966 SuggestedPredefines, 967 FileMgr); 968 return false; 969} 970 971//===----------------------------------------------------------------------===// 972// Source Manager Deserialization 973//===----------------------------------------------------------------------===// 974 975/// \brief Read the line table in the source manager block. 976/// \returns true if there was an error. 977bool ASTReader::ParseLineTable(PerFileData &F, 978 llvm::SmallVectorImpl<uint64_t> &Record) { 979 unsigned Idx = 0; 980 LineTableInfo &LineTable = SourceMgr.getLineTable(); 981 982 // Parse the file names 983 std::map<int, int> FileIDs; 984 for (int I = 0, N = Record[Idx++]; I != N; ++I) { 985 // Extract the file name 986 unsigned FilenameLen = Record[Idx++]; 987 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); 988 Idx += FilenameLen; 989 MaybeAddSystemRootToFilename(Filename); 990 FileIDs[I] = LineTable.getLineTableFilenameID(Filename.c_str(), 991 Filename.size()); 992 } 993 994 // Parse the line entries 995 std::vector<LineEntry> Entries; 996 while (Idx < Record.size()) { 997 int FID = Record[Idx++]; 998 999 // Extract the line entries 1000 unsigned NumEntries = Record[Idx++]; 1001 assert(NumEntries && "Numentries is 00000"); 1002 Entries.clear(); 1003 Entries.reserve(NumEntries); 1004 for (unsigned I = 0; I != NumEntries; ++I) { 1005 unsigned FileOffset = Record[Idx++]; 1006 unsigned LineNo = Record[Idx++]; 1007 int FilenameID = FileIDs[Record[Idx++]]; 1008 SrcMgr::CharacteristicKind FileKind 1009 = (SrcMgr::CharacteristicKind)Record[Idx++]; 1010 unsigned IncludeOffset = Record[Idx++]; 1011 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, 1012 FileKind, IncludeOffset)); 1013 } 1014 LineTable.AddEntry(FID, Entries); 1015 } 1016 1017 return false; 1018} 1019 1020namespace { 1021 1022class ASTStatData { 1023public: 1024 const ino_t ino; 1025 const dev_t dev; 1026 const mode_t mode; 1027 const time_t mtime; 1028 const off_t size; 1029 1030 ASTStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 1031 : ino(i), dev(d), mode(mo), mtime(m), size(s) {} 1032}; 1033 1034class ASTStatLookupTrait { 1035 public: 1036 typedef const char *external_key_type; 1037 typedef const char *internal_key_type; 1038 1039 typedef ASTStatData data_type; 1040 1041 static unsigned ComputeHash(const char *path) { 1042 return llvm::HashString(path); 1043 } 1044 1045 static internal_key_type GetInternalKey(const char *path) { return path; } 1046 1047 static bool EqualKey(internal_key_type a, internal_key_type b) { 1048 return strcmp(a, b) == 0; 1049 } 1050 1051 static std::pair<unsigned, unsigned> 1052 ReadKeyDataLength(const unsigned char*& d) { 1053 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1054 unsigned DataLen = (unsigned) *d++; 1055 return std::make_pair(KeyLen + 1, DataLen); 1056 } 1057 1058 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1059 return (const char *)d; 1060 } 1061 1062 static data_type ReadData(const internal_key_type, const unsigned char *d, 1063 unsigned /*DataLen*/) { 1064 using namespace clang::io; 1065 1066 ino_t ino = (ino_t) ReadUnalignedLE32(d); 1067 dev_t dev = (dev_t) ReadUnalignedLE32(d); 1068 mode_t mode = (mode_t) ReadUnalignedLE16(d); 1069 time_t mtime = (time_t) ReadUnalignedLE64(d); 1070 off_t size = (off_t) ReadUnalignedLE64(d); 1071 return data_type(ino, dev, mode, mtime, size); 1072 } 1073}; 1074 1075/// \brief stat() cache for precompiled headers. 1076/// 1077/// This cache is very similar to the stat cache used by pretokenized 1078/// headers. 1079class ASTStatCache : public FileSystemStatCache { 1080 typedef OnDiskChainedHashTable<ASTStatLookupTrait> CacheTy; 1081 CacheTy *Cache; 1082 1083 unsigned &NumStatHits, &NumStatMisses; 1084public: 1085 ASTStatCache(const unsigned char *Buckets, const unsigned char *Base, 1086 unsigned &NumStatHits, unsigned &NumStatMisses) 1087 : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { 1088 Cache = CacheTy::Create(Buckets, Base); 1089 } 1090 1091 ~ASTStatCache() { delete Cache; } 1092 1093 LookupResult getStat(const char *Path, struct stat &StatBuf, 1094 int *FileDescriptor) { 1095 // Do the lookup for the file's data in the AST file. 1096 CacheTy::iterator I = Cache->find(Path); 1097 1098 // If we don't get a hit in the AST file just forward to 'stat'. 1099 if (I == Cache->end()) { 1100 ++NumStatMisses; 1101 return statChained(Path, StatBuf, FileDescriptor); 1102 } 1103 1104 ++NumStatHits; 1105 ASTStatData Data = *I; 1106 1107 StatBuf.st_ino = Data.ino; 1108 StatBuf.st_dev = Data.dev; 1109 StatBuf.st_mtime = Data.mtime; 1110 StatBuf.st_mode = Data.mode; 1111 StatBuf.st_size = Data.size; 1112 return CacheExists; 1113 } 1114}; 1115} // end anonymous namespace 1116 1117 1118/// \brief Read a source manager block 1119ASTReader::ASTReadResult ASTReader::ReadSourceManagerBlock(PerFileData &F) { 1120 using namespace SrcMgr; 1121 1122 llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; 1123 1124 // Set the source-location entry cursor to the current position in 1125 // the stream. This cursor will be used to read the contents of the 1126 // source manager block initially, and then lazily read 1127 // source-location entries as needed. 1128 SLocEntryCursor = F.Stream; 1129 1130 // The stream itself is going to skip over the source manager block. 1131 if (F.Stream.SkipBlock()) { 1132 Error("malformed block record in AST file"); 1133 return Failure; 1134 } 1135 1136 // Enter the source manager block. 1137 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { 1138 Error("malformed source manager block record in AST file"); 1139 return Failure; 1140 } 1141 1142 RecordData Record; 1143 while (true) { 1144 unsigned Code = SLocEntryCursor.ReadCode(); 1145 if (Code == llvm::bitc::END_BLOCK) { 1146 if (SLocEntryCursor.ReadBlockEnd()) { 1147 Error("error at end of Source Manager block in AST file"); 1148 return Failure; 1149 } 1150 return Success; 1151 } 1152 1153 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1154 // No known subblocks, always skip them. 1155 SLocEntryCursor.ReadSubBlockID(); 1156 if (SLocEntryCursor.SkipBlock()) { 1157 Error("malformed block record in AST file"); 1158 return Failure; 1159 } 1160 continue; 1161 } 1162 1163 if (Code == llvm::bitc::DEFINE_ABBREV) { 1164 SLocEntryCursor.ReadAbbrevRecord(); 1165 continue; 1166 } 1167 1168 // Read a record. 1169 const char *BlobStart; 1170 unsigned BlobLen; 1171 Record.clear(); 1172 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1173 default: // Default behavior: ignore. 1174 break; 1175 1176 case SM_LINE_TABLE: 1177 if (ParseLineTable(F, Record)) 1178 return Failure; 1179 break; 1180 1181 case SM_SLOC_FILE_ENTRY: 1182 case SM_SLOC_BUFFER_ENTRY: 1183 case SM_SLOC_INSTANTIATION_ENTRY: 1184 // Once we hit one of the source location entries, we're done. 1185 return Success; 1186 } 1187 } 1188} 1189 1190/// \brief If a header file is not found at the path that we expect it to be 1191/// and the PCH file was moved from its original location, try to resolve the 1192/// file by assuming that header+PCH were moved together and the header is in 1193/// the same place relative to the PCH. 1194static std::string 1195resolveFileRelativeToOriginalDir(const std::string &Filename, 1196 const std::string &OriginalDir, 1197 const std::string &CurrDir) { 1198 assert(OriginalDir != CurrDir && 1199 "No point trying to resolve the file if the PCH dir didn't change"); 1200 using namespace llvm::sys; 1201 llvm::SmallString<128> filePath(Filename); 1202 fs::make_absolute(filePath); 1203 assert(path::is_absolute(OriginalDir)); 1204 llvm::SmallString<128> currPCHPath(CurrDir); 1205 1206 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), 1207 fileDirE = path::end(path::parent_path(filePath)); 1208 path::const_iterator origDirI = path::begin(OriginalDir), 1209 origDirE = path::end(OriginalDir); 1210 // Skip the common path components from filePath and OriginalDir. 1211 while (fileDirI != fileDirE && origDirI != origDirE && 1212 *fileDirI == *origDirI) { 1213 ++fileDirI; 1214 ++origDirI; 1215 } 1216 for (; origDirI != origDirE; ++origDirI) 1217 path::append(currPCHPath, ".."); 1218 path::append(currPCHPath, fileDirI, fileDirE); 1219 path::append(currPCHPath, path::filename(Filename)); 1220 return currPCHPath.str(); 1221} 1222 1223/// \brief Get a cursor that's correctly positioned for reading the source 1224/// location entry with the given ID. 1225ASTReader::PerFileData *ASTReader::SLocCursorForID(unsigned ID) { 1226 assert(ID != 0 && ID <= TotalNumSLocEntries && 1227 "SLocCursorForID should only be called for real IDs."); 1228 1229 ID -= 1; 1230 PerFileData *F = 0; 1231 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 1232 F = Chain[N - I - 1]; 1233 if (ID < F->LocalNumSLocEntries) 1234 break; 1235 ID -= F->LocalNumSLocEntries; 1236 } 1237 assert(F && F->LocalNumSLocEntries > ID && "Chain corrupted"); 1238 1239 F->SLocEntryCursor.JumpToBit(F->SLocOffsets[ID]); 1240 return F; 1241} 1242 1243/// \brief Read in the source location entry with the given ID. 1244ASTReader::ASTReadResult ASTReader::ReadSLocEntryRecord(unsigned ID) { 1245 if (ID == 0) 1246 return Success; 1247 1248 if (ID > TotalNumSLocEntries) { 1249 Error("source location entry ID out-of-range for AST file"); 1250 return Failure; 1251 } 1252 1253 PerFileData *F = SLocCursorForID(ID); 1254 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 1255 1256 ++NumSLocEntriesRead; 1257 unsigned Code = SLocEntryCursor.ReadCode(); 1258 if (Code == llvm::bitc::END_BLOCK || 1259 Code == llvm::bitc::ENTER_SUBBLOCK || 1260 Code == llvm::bitc::DEFINE_ABBREV) { 1261 Error("incorrectly-formatted source location entry in AST file"); 1262 return Failure; 1263 } 1264 1265 RecordData Record; 1266 const char *BlobStart; 1267 unsigned BlobLen; 1268 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1269 default: 1270 Error("incorrectly-formatted source location entry in AST file"); 1271 return Failure; 1272 1273 case SM_SLOC_FILE_ENTRY: { 1274 std::string Filename(BlobStart, BlobStart + BlobLen); 1275 MaybeAddSystemRootToFilename(Filename); 1276 const FileEntry *File = FileMgr.getFile(Filename); 1277 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1278 OriginalDir != CurrentDir) { 1279 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1280 OriginalDir, 1281 CurrentDir); 1282 if (!resolved.empty()) 1283 File = FileMgr.getFile(resolved); 1284 } 1285 if (File == 0) 1286 File = FileMgr.getVirtualFile(Filename, (off_t)Record[4], 1287 (time_t)Record[5]); 1288 if (File == 0) { 1289 std::string ErrorStr = "could not find file '"; 1290 ErrorStr += Filename; 1291 ErrorStr += "' referenced by AST file"; 1292 Error(ErrorStr.c_str()); 1293 return Failure; 1294 } 1295 1296 if (Record.size() < 6) { 1297 Error("source location entry is incorrect"); 1298 return Failure; 1299 } 1300 1301 if (!DisableValidation && 1302 ((off_t)Record[4] != File->getSize() 1303#if !defined(LLVM_ON_WIN32) 1304 // In our regression testing, the Windows file system seems to 1305 // have inconsistent modification times that sometimes 1306 // erroneously trigger this error-handling path. 1307 || (time_t)Record[5] != File->getModificationTime() 1308#endif 1309 )) { 1310 Diag(diag::err_fe_pch_file_modified) 1311 << Filename; 1312 return Failure; 1313 } 1314 1315 FileID FID = SourceMgr.createFileID(File, ReadSourceLocation(*F, Record[1]), 1316 (SrcMgr::CharacteristicKind)Record[2], 1317 ID, Record[0]); 1318 if (Record[3]) 1319 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()) 1320 .setHasLineDirectives(); 1321 1322 break; 1323 } 1324 1325 case SM_SLOC_BUFFER_ENTRY: { 1326 const char *Name = BlobStart; 1327 unsigned Offset = Record[0]; 1328 unsigned Code = SLocEntryCursor.ReadCode(); 1329 Record.clear(); 1330 unsigned RecCode 1331 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1332 1333 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1334 Error("AST record has invalid code"); 1335 return Failure; 1336 } 1337 1338 llvm::MemoryBuffer *Buffer 1339 = llvm::MemoryBuffer::getMemBuffer(llvm::StringRef(BlobStart, BlobLen - 1), 1340 Name); 1341 FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, Offset); 1342 1343 if (strcmp(Name, "<built-in>") == 0) { 1344 PCHPredefinesBlock Block = { 1345 BufferID, 1346 llvm::StringRef(BlobStart, BlobLen - 1) 1347 }; 1348 PCHPredefinesBuffers.push_back(Block); 1349 } 1350 1351 break; 1352 } 1353 1354 case SM_SLOC_INSTANTIATION_ENTRY: { 1355 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); 1356 SourceMgr.createInstantiationLoc(SpellingLoc, 1357 ReadSourceLocation(*F, Record[2]), 1358 ReadSourceLocation(*F, Record[3]), 1359 Record[4], 1360 ID, 1361 Record[0]); 1362 break; 1363 } 1364 } 1365 1366 return Success; 1367} 1368 1369/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the 1370/// specified cursor. Read the abbreviations that are at the top of the block 1371/// and then leave the cursor pointing into the block. 1372bool ASTReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, 1373 unsigned BlockID) { 1374 if (Cursor.EnterSubBlock(BlockID)) { 1375 Error("malformed block record in AST file"); 1376 return Failure; 1377 } 1378 1379 while (true) { 1380 uint64_t Offset = Cursor.GetCurrentBitNo(); 1381 unsigned Code = Cursor.ReadCode(); 1382 1383 // We expect all abbrevs to be at the start of the block. 1384 if (Code != llvm::bitc::DEFINE_ABBREV) { 1385 Cursor.JumpToBit(Offset); 1386 return false; 1387 } 1388 Cursor.ReadAbbrevRecord(); 1389 } 1390} 1391 1392PreprocessedEntity *ASTReader::ReadMacroRecord(PerFileData &F, uint64_t Offset) { 1393 assert(PP && "Forgot to set Preprocessor ?"); 1394 llvm::BitstreamCursor &Stream = F.MacroCursor; 1395 1396 // Keep track of where we are in the stream, then jump back there 1397 // after reading this macro. 1398 SavedStreamPosition SavedPosition(Stream); 1399 1400 Stream.JumpToBit(Offset); 1401 RecordData Record; 1402 llvm::SmallVector<IdentifierInfo*, 16> MacroArgs; 1403 MacroInfo *Macro = 0; 1404 1405 while (true) { 1406 unsigned Code = Stream.ReadCode(); 1407 switch (Code) { 1408 case llvm::bitc::END_BLOCK: 1409 return 0; 1410 1411 case llvm::bitc::ENTER_SUBBLOCK: 1412 // No known subblocks, always skip them. 1413 Stream.ReadSubBlockID(); 1414 if (Stream.SkipBlock()) { 1415 Error("malformed block record in AST file"); 1416 return 0; 1417 } 1418 continue; 1419 1420 case llvm::bitc::DEFINE_ABBREV: 1421 Stream.ReadAbbrevRecord(); 1422 continue; 1423 default: break; 1424 } 1425 1426 // Read a record. 1427 const char *BlobStart = 0; 1428 unsigned BlobLen = 0; 1429 Record.clear(); 1430 PreprocessorRecordTypes RecType = 1431 (PreprocessorRecordTypes)Stream.ReadRecord(Code, Record, BlobStart, 1432 BlobLen); 1433 switch (RecType) { 1434 case PP_MACRO_OBJECT_LIKE: 1435 case PP_MACRO_FUNCTION_LIKE: { 1436 // If we already have a macro, that means that we've hit the end 1437 // of the definition of the macro we were looking for. We're 1438 // done. 1439 if (Macro) 1440 return 0; 1441 1442 IdentifierInfo *II = DecodeIdentifierInfo(Record[0]); 1443 if (II == 0) { 1444 Error("macro must have a name in AST file"); 1445 return 0; 1446 } 1447 SourceLocation Loc = ReadSourceLocation(F, Record[1]); 1448 bool isUsed = Record[2]; 1449 1450 MacroInfo *MI = PP->AllocateMacroInfo(Loc); 1451 MI->setIsUsed(isUsed); 1452 MI->setIsFromAST(); 1453 1454 unsigned NextIndex = 3; 1455 if (RecType == PP_MACRO_FUNCTION_LIKE) { 1456 // Decode function-like macro info. 1457 bool isC99VarArgs = Record[3]; 1458 bool isGNUVarArgs = Record[4]; 1459 MacroArgs.clear(); 1460 unsigned NumArgs = Record[5]; 1461 NextIndex = 6 + NumArgs; 1462 for (unsigned i = 0; i != NumArgs; ++i) 1463 MacroArgs.push_back(DecodeIdentifierInfo(Record[6+i])); 1464 1465 // Install function-like macro info. 1466 MI->setIsFunctionLike(); 1467 if (isC99VarArgs) MI->setIsC99Varargs(); 1468 if (isGNUVarArgs) MI->setIsGNUVarargs(); 1469 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), 1470 PP->getPreprocessorAllocator()); 1471 } 1472 1473 // Finally, install the macro. 1474 PP->setMacroInfo(II, MI); 1475 1476 // Remember that we saw this macro last so that we add the tokens that 1477 // form its body to it. 1478 Macro = MI; 1479 1480 if (NextIndex + 1 == Record.size() && PP->getPreprocessingRecord()) { 1481 // We have a macro definition. Load it now. 1482 PP->getPreprocessingRecord()->RegisterMacroDefinition(Macro, 1483 getMacroDefinition(Record[NextIndex])); 1484 } 1485 1486 ++NumMacrosRead; 1487 break; 1488 } 1489 1490 case PP_TOKEN: { 1491 // If we see a TOKEN before a PP_MACRO_*, then the file is 1492 // erroneous, just pretend we didn't see this. 1493 if (Macro == 0) break; 1494 1495 Token Tok; 1496 Tok.startToken(); 1497 Tok.setLocation(ReadSourceLocation(F, Record[0])); 1498 Tok.setLength(Record[1]); 1499 if (IdentifierInfo *II = DecodeIdentifierInfo(Record[2])) 1500 Tok.setIdentifierInfo(II); 1501 Tok.setKind((tok::TokenKind)Record[3]); 1502 Tok.setFlag((Token::TokenFlags)Record[4]); 1503 Macro->AddTokenToBody(Tok); 1504 break; 1505 } 1506 } 1507 } 1508 1509 return 0; 1510} 1511 1512PreprocessedEntity *ASTReader::LoadPreprocessedEntity(PerFileData &F) { 1513 assert(PP && "Forgot to set Preprocessor ?"); 1514 unsigned Code = F.PreprocessorDetailCursor.ReadCode(); 1515 switch (Code) { 1516 case llvm::bitc::END_BLOCK: 1517 return 0; 1518 1519 case llvm::bitc::ENTER_SUBBLOCK: 1520 Error("unexpected subblock record in preprocessor detail block"); 1521 return 0; 1522 1523 case llvm::bitc::DEFINE_ABBREV: 1524 Error("unexpected abbrevation record in preprocessor detail block"); 1525 return 0; 1526 1527 default: 1528 break; 1529 } 1530 1531 if (!PP->getPreprocessingRecord()) { 1532 Error("no preprocessing record"); 1533 return 0; 1534 } 1535 1536 // Read the record. 1537 PreprocessingRecord &PPRec = *PP->getPreprocessingRecord(); 1538 const char *BlobStart = 0; 1539 unsigned BlobLen = 0; 1540 RecordData Record; 1541 PreprocessorDetailRecordTypes RecType = 1542 (PreprocessorDetailRecordTypes)F.PreprocessorDetailCursor.ReadRecord( 1543 Code, Record, BlobStart, BlobLen); 1544 switch (RecType) { 1545 case PPD_MACRO_INSTANTIATION: { 1546 if (PreprocessedEntity *PE = PPRec.getPreprocessedEntity(Record[0])) 1547 return PE; 1548 1549 MacroInstantiation *MI 1550 = new (PPRec) MacroInstantiation(DecodeIdentifierInfo(Record[3]), 1551 SourceRange(ReadSourceLocation(F, Record[1]), 1552 ReadSourceLocation(F, Record[2])), 1553 getMacroDefinition(Record[4])); 1554 PPRec.SetPreallocatedEntity(Record[0], MI); 1555 return MI; 1556 } 1557 1558 case PPD_MACRO_DEFINITION: { 1559 if (PreprocessedEntity *PE = PPRec.getPreprocessedEntity(Record[0])) 1560 return PE; 1561 1562 if (Record[1] > MacroDefinitionsLoaded.size()) { 1563 Error("out-of-bounds macro definition record"); 1564 return 0; 1565 } 1566 1567 // Decode the identifier info and then check again; if the macro is 1568 // still defined and associated with the identifier, 1569 IdentifierInfo *II = DecodeIdentifierInfo(Record[4]); 1570 if (!MacroDefinitionsLoaded[Record[1] - 1]) { 1571 MacroDefinition *MD 1572 = new (PPRec) MacroDefinition(II, 1573 ReadSourceLocation(F, Record[5]), 1574 SourceRange( 1575 ReadSourceLocation(F, Record[2]), 1576 ReadSourceLocation(F, Record[3]))); 1577 1578 PPRec.SetPreallocatedEntity(Record[0], MD); 1579 MacroDefinitionsLoaded[Record[1] - 1] = MD; 1580 1581 if (DeserializationListener) 1582 DeserializationListener->MacroDefinitionRead(Record[1], MD); 1583 } 1584 1585 return MacroDefinitionsLoaded[Record[1] - 1]; 1586 } 1587 1588 case PPD_INCLUSION_DIRECTIVE: { 1589 if (PreprocessedEntity *PE = PPRec.getPreprocessedEntity(Record[0])) 1590 return PE; 1591 1592 const char *FullFileNameStart = BlobStart + Record[3]; 1593 const FileEntry *File 1594 = PP->getFileManager().getFile(llvm::StringRef(FullFileNameStart, 1595 BlobLen - Record[3])); 1596 1597 // FIXME: Stable encoding 1598 InclusionDirective::InclusionKind Kind 1599 = static_cast<InclusionDirective::InclusionKind>(Record[5]); 1600 InclusionDirective *ID 1601 = new (PPRec) InclusionDirective(PPRec, Kind, 1602 llvm::StringRef(BlobStart, Record[3]), 1603 Record[4], 1604 File, 1605 SourceRange(ReadSourceLocation(F, Record[1]), 1606 ReadSourceLocation(F, Record[2]))); 1607 PPRec.SetPreallocatedEntity(Record[0], ID); 1608 return ID; 1609 } 1610 } 1611 1612 Error("invalid offset in preprocessor detail block"); 1613 return 0; 1614} 1615 1616namespace { 1617 /// \brief Trait class used to search the on-disk hash table containing all of 1618 /// the header search information. 1619 /// 1620 /// The on-disk hash table contains a mapping from each header path to 1621 /// information about that header (how many times it has been included, its 1622 /// controlling macro, etc.). Note that we actually hash based on the 1623 /// filename, and support "deep" comparisons of file names based on current 1624 /// inode numbers, so that the search can cope with non-normalized path names 1625 /// and symlinks. 1626 class HeaderFileInfoTrait { 1627 const char *SearchPath; 1628 struct stat SearchPathStatBuf; 1629 llvm::Optional<int> SearchPathStatResult; 1630 1631 int StatSimpleCache(const char *Path, struct stat *StatBuf) { 1632 if (Path == SearchPath) { 1633 if (!SearchPathStatResult) 1634 SearchPathStatResult = stat(Path, &SearchPathStatBuf); 1635 1636 *StatBuf = SearchPathStatBuf; 1637 return *SearchPathStatResult; 1638 } 1639 1640 return stat(Path, StatBuf); 1641 } 1642 1643 public: 1644 typedef const char *external_key_type; 1645 typedef const char *internal_key_type; 1646 1647 typedef HeaderFileInfo data_type; 1648 1649 HeaderFileInfoTrait(const char *SearchPath = 0) : SearchPath(SearchPath) { } 1650 1651 static unsigned ComputeHash(const char *path) { 1652 return llvm::HashString(llvm::sys::path::filename(path)); 1653 } 1654 1655 static internal_key_type GetInternalKey(const char *path) { return path; } 1656 1657 bool EqualKey(internal_key_type a, internal_key_type b) { 1658 if (strcmp(a, b) == 0) 1659 return true; 1660 1661 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1662 return false; 1663 1664 // The file names match, but the path names don't. stat() the files to 1665 // see if they are the same. 1666 struct stat StatBufA, StatBufB; 1667 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1668 return false; 1669 1670 return StatBufA.st_ino == StatBufB.st_ino; 1671 } 1672 1673 static std::pair<unsigned, unsigned> 1674 ReadKeyDataLength(const unsigned char*& d) { 1675 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1676 unsigned DataLen = (unsigned) *d++; 1677 return std::make_pair(KeyLen + 1, DataLen); 1678 } 1679 1680 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1681 return (const char *)d; 1682 } 1683 1684 static data_type ReadData(const internal_key_type, const unsigned char *d, 1685 unsigned DataLen) { 1686 const unsigned char *End = d + DataLen; 1687 using namespace clang::io; 1688 HeaderFileInfo HFI; 1689 unsigned Flags = *d++; 1690 HFI.isImport = (Flags >> 3) & 0x01; 1691 HFI.DirInfo = (Flags >> 1) & 0x03; 1692 HFI.Resolved = Flags & 0x01; 1693 HFI.NumIncludes = ReadUnalignedLE16(d); 1694 HFI.ControllingMacroID = ReadUnalignedLE32(d); 1695 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1696 (void)End; 1697 1698 // This HeaderFileInfo was externally loaded. 1699 HFI.External = true; 1700 return HFI; 1701 } 1702 }; 1703} 1704 1705/// \brief The on-disk hash table used for the global method pool. 1706typedef OnDiskChainedHashTable<HeaderFileInfoTrait> 1707 HeaderFileInfoLookupTable; 1708 1709void ASTReader::SetIdentifierIsMacro(IdentifierInfo *II, PerFileData &F, 1710 uint64_t Offset) { 1711 // Note that this identifier has a macro definition. 1712 II->setHasMacroDefinition(true); 1713 1714 // Adjust the offset based on our position in the chain. 1715 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 1716 if (Chain[I] == &F) 1717 break; 1718 1719 Offset += Chain[I]->SizeInBits; 1720 } 1721 1722 UnreadMacroRecordOffsets[II] = Offset; 1723} 1724 1725void ASTReader::ReadDefinedMacros() { 1726 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 1727 PerFileData &F = *Chain[N - I - 1]; 1728 llvm::BitstreamCursor &MacroCursor = F.MacroCursor; 1729 1730 // If there was no preprocessor block, skip this file. 1731 if (!MacroCursor.getBitStreamReader()) 1732 continue; 1733 1734 llvm::BitstreamCursor Cursor = MacroCursor; 1735 Cursor.JumpToBit(F.MacroStartOffset); 1736 1737 RecordData Record; 1738 while (true) { 1739 unsigned Code = Cursor.ReadCode(); 1740 if (Code == llvm::bitc::END_BLOCK) 1741 break; 1742 1743 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1744 // No known subblocks, always skip them. 1745 Cursor.ReadSubBlockID(); 1746 if (Cursor.SkipBlock()) { 1747 Error("malformed block record in AST file"); 1748 return; 1749 } 1750 continue; 1751 } 1752 1753 if (Code == llvm::bitc::DEFINE_ABBREV) { 1754 Cursor.ReadAbbrevRecord(); 1755 continue; 1756 } 1757 1758 // Read a record. 1759 const char *BlobStart; 1760 unsigned BlobLen; 1761 Record.clear(); 1762 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1763 default: // Default behavior: ignore. 1764 break; 1765 1766 case PP_MACRO_OBJECT_LIKE: 1767 case PP_MACRO_FUNCTION_LIKE: 1768 DecodeIdentifierInfo(Record[0]); 1769 break; 1770 1771 case PP_TOKEN: 1772 // Ignore tokens. 1773 break; 1774 } 1775 } 1776 } 1777 1778 // Drain the unread macro-record offsets map. 1779 while (!UnreadMacroRecordOffsets.empty()) 1780 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1781} 1782 1783void ASTReader::LoadMacroDefinition( 1784 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1785 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1786 PerFileData *F = 0; 1787 uint64_t Offset = Pos->second; 1788 UnreadMacroRecordOffsets.erase(Pos); 1789 1790 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 1791 if (Offset < Chain[I]->SizeInBits) { 1792 F = Chain[I]; 1793 break; 1794 } 1795 1796 Offset -= Chain[I]->SizeInBits; 1797 } 1798 if (!F) { 1799 Error("Malformed macro record offset"); 1800 return; 1801 } 1802 1803 ReadMacroRecord(*F, Offset); 1804} 1805 1806void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1807 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1808 = UnreadMacroRecordOffsets.find(II); 1809 LoadMacroDefinition(Pos); 1810} 1811 1812MacroDefinition *ASTReader::getMacroDefinition(MacroID ID) { 1813 if (ID == 0 || ID > MacroDefinitionsLoaded.size()) 1814 return 0; 1815 1816 if (!MacroDefinitionsLoaded[ID - 1]) { 1817 unsigned Index = ID - 1; 1818 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 1819 PerFileData &F = *Chain[N - I - 1]; 1820 if (Index < F.LocalNumMacroDefinitions) { 1821 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 1822 F.PreprocessorDetailCursor.JumpToBit(F.MacroDefinitionOffsets[Index]); 1823 LoadPreprocessedEntity(F); 1824 break; 1825 } 1826 Index -= F.LocalNumMacroDefinitions; 1827 } 1828 assert(MacroDefinitionsLoaded[ID - 1] && "Broken chain"); 1829 } 1830 1831 return MacroDefinitionsLoaded[ID - 1]; 1832} 1833 1834/// \brief If we are loading a relocatable PCH file, and the filename is 1835/// not an absolute path, add the system root to the beginning of the file 1836/// name. 1837void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1838 // If this is not a relocatable PCH file, there's nothing to do. 1839 if (!RelocatablePCH) 1840 return; 1841 1842 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1843 return; 1844 1845 if (isysroot == 0) { 1846 // If no system root was given, default to '/' 1847 Filename.insert(Filename.begin(), '/'); 1848 return; 1849 } 1850 1851 unsigned Length = strlen(isysroot); 1852 if (isysroot[Length - 1] != '/') 1853 Filename.insert(Filename.begin(), '/'); 1854 1855 Filename.insert(Filename.begin(), isysroot, isysroot + Length); 1856} 1857 1858ASTReader::ASTReadResult 1859ASTReader::ReadASTBlock(PerFileData &F) { 1860 llvm::BitstreamCursor &Stream = F.Stream; 1861 1862 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1863 Error("malformed block record in AST file"); 1864 return Failure; 1865 } 1866 1867 // Read all of the records and blocks for the ASt file. 1868 RecordData Record; 1869 bool First = true; 1870 while (!Stream.AtEndOfStream()) { 1871 unsigned Code = Stream.ReadCode(); 1872 if (Code == llvm::bitc::END_BLOCK) { 1873 if (Stream.ReadBlockEnd()) { 1874 Error("error at end of module block in AST file"); 1875 return Failure; 1876 } 1877 1878 return Success; 1879 } 1880 1881 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1882 switch (Stream.ReadSubBlockID()) { 1883 case DECLTYPES_BLOCK_ID: 1884 // We lazily load the decls block, but we want to set up the 1885 // DeclsCursor cursor to point into it. Clone our current bitcode 1886 // cursor to it, enter the block and read the abbrevs in that block. 1887 // With the main cursor, we just skip over it. 1888 F.DeclsCursor = Stream; 1889 if (Stream.SkipBlock() || // Skip with the main cursor. 1890 // Read the abbrevs. 1891 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1892 Error("malformed block record in AST file"); 1893 return Failure; 1894 } 1895 break; 1896 1897 case DECL_UPDATES_BLOCK_ID: 1898 if (Stream.SkipBlock()) { 1899 Error("malformed block record in AST file"); 1900 return Failure; 1901 } 1902 break; 1903 1904 case PREPROCESSOR_BLOCK_ID: 1905 F.MacroCursor = Stream; 1906 if (PP) 1907 PP->setExternalSource(this); 1908 1909 if (Stream.SkipBlock() || 1910 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1911 Error("malformed block record in AST file"); 1912 return Failure; 1913 } 1914 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1915 break; 1916 1917 case PREPROCESSOR_DETAIL_BLOCK_ID: 1918 F.PreprocessorDetailCursor = Stream; 1919 if (Stream.SkipBlock() || 1920 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1921 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1922 Error("malformed preprocessor detail record in AST file"); 1923 return Failure; 1924 } 1925 F.PreprocessorDetailStartOffset 1926 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1927 break; 1928 1929 case SOURCE_MANAGER_BLOCK_ID: 1930 switch (ReadSourceManagerBlock(F)) { 1931 case Success: 1932 break; 1933 1934 case Failure: 1935 Error("malformed source manager block in AST file"); 1936 return Failure; 1937 1938 case IgnorePCH: 1939 return IgnorePCH; 1940 } 1941 break; 1942 } 1943 First = false; 1944 continue; 1945 } 1946 1947 if (Code == llvm::bitc::DEFINE_ABBREV) { 1948 Stream.ReadAbbrevRecord(); 1949 continue; 1950 } 1951 1952 // Read and process a record. 1953 Record.clear(); 1954 const char *BlobStart = 0; 1955 unsigned BlobLen = 0; 1956 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 1957 &BlobStart, &BlobLen)) { 1958 default: // Default behavior: ignore. 1959 break; 1960 1961 case METADATA: { 1962 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 1963 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 1964 : diag::warn_pch_version_too_new); 1965 return IgnorePCH; 1966 } 1967 1968 RelocatablePCH = Record[4]; 1969 if (Listener) { 1970 std::string TargetTriple(BlobStart, BlobLen); 1971 if (Listener->ReadTargetTriple(TargetTriple)) 1972 return IgnorePCH; 1973 } 1974 break; 1975 } 1976 1977 case CHAINED_METADATA: { 1978 if (!First) { 1979 Error("CHAINED_METADATA is not first record in block"); 1980 return Failure; 1981 } 1982 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 1983 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 1984 : diag::warn_pch_version_too_new); 1985 return IgnorePCH; 1986 } 1987 1988 // Load the chained file, which is always a PCH file. 1989 switch(ReadASTCore(llvm::StringRef(BlobStart, BlobLen), PCH)) { 1990 case Failure: return Failure; 1991 // If we have to ignore the dependency, we'll have to ignore this too. 1992 case IgnorePCH: return IgnorePCH; 1993 case Success: break; 1994 } 1995 break; 1996 } 1997 1998 case TYPE_OFFSET: 1999 if (F.LocalNumTypes != 0) { 2000 Error("duplicate TYPE_OFFSET record in AST file"); 2001 return Failure; 2002 } 2003 F.TypeOffsets = (const uint32_t *)BlobStart; 2004 F.LocalNumTypes = Record[0]; 2005 break; 2006 2007 case DECL_OFFSET: 2008 if (F.LocalNumDecls != 0) { 2009 Error("duplicate DECL_OFFSET record in AST file"); 2010 return Failure; 2011 } 2012 F.DeclOffsets = (const uint32_t *)BlobStart; 2013 F.LocalNumDecls = Record[0]; 2014 break; 2015 2016 case TU_UPDATE_LEXICAL: { 2017 DeclContextInfo Info = { 2018 /* No visible information */ 0, 2019 reinterpret_cast<const KindDeclIDPair *>(BlobStart), 2020 BlobLen / sizeof(KindDeclIDPair) 2021 }; 2022 DeclContextOffsets[Context ? Context->getTranslationUnitDecl() : 0] 2023 .push_back(Info); 2024 break; 2025 } 2026 2027 case UPDATE_VISIBLE: { 2028 serialization::DeclID ID = Record[0]; 2029 void *Table = ASTDeclContextNameLookupTable::Create( 2030 (const unsigned char *)BlobStart + Record[1], 2031 (const unsigned char *)BlobStart, 2032 ASTDeclContextNameLookupTrait(*this)); 2033 if (ID == 1 && Context) { // Is it the TU? 2034 DeclContextInfo Info = { 2035 Table, /* No lexical inforamtion */ 0, 0 2036 }; 2037 DeclContextOffsets[Context->getTranslationUnitDecl()].push_back(Info); 2038 } else 2039 PendingVisibleUpdates[ID].push_back(Table); 2040 break; 2041 } 2042 2043 case REDECLS_UPDATE_LATEST: { 2044 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 2045 for (unsigned i = 0, e = Record.size(); i < e; i += 2) { 2046 DeclID First = Record[i], Latest = Record[i+1]; 2047 assert((FirstLatestDeclIDs.find(First) == FirstLatestDeclIDs.end() || 2048 Latest > FirstLatestDeclIDs[First]) && 2049 "The new latest is supposed to come after the previous latest"); 2050 FirstLatestDeclIDs[First] = Latest; 2051 } 2052 break; 2053 } 2054 2055 case LANGUAGE_OPTIONS: 2056 if (ParseLanguageOptions(Record) && !DisableValidation) 2057 return IgnorePCH; 2058 break; 2059 2060 case IDENTIFIER_TABLE: 2061 F.IdentifierTableData = BlobStart; 2062 if (Record[0]) { 2063 F.IdentifierLookupTable 2064 = ASTIdentifierLookupTable::Create( 2065 (const unsigned char *)F.IdentifierTableData + Record[0], 2066 (const unsigned char *)F.IdentifierTableData, 2067 ASTIdentifierLookupTrait(*this, F)); 2068 if (PP) 2069 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2070 } 2071 break; 2072 2073 case IDENTIFIER_OFFSET: 2074 if (F.LocalNumIdentifiers != 0) { 2075 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 2076 return Failure; 2077 } 2078 F.IdentifierOffsets = (const uint32_t *)BlobStart; 2079 F.LocalNumIdentifiers = Record[0]; 2080 break; 2081 2082 case EXTERNAL_DEFINITIONS: 2083 // Optimization for the first block. 2084 if (ExternalDefinitions.empty()) 2085 ExternalDefinitions.swap(Record); 2086 else 2087 ExternalDefinitions.insert(ExternalDefinitions.end(), 2088 Record.begin(), Record.end()); 2089 break; 2090 2091 case SPECIAL_TYPES: 2092 // Optimization for the first block 2093 if (SpecialTypes.empty()) 2094 SpecialTypes.swap(Record); 2095 else 2096 SpecialTypes.insert(SpecialTypes.end(), Record.begin(), Record.end()); 2097 break; 2098 2099 case STATISTICS: 2100 TotalNumStatements += Record[0]; 2101 TotalNumMacros += Record[1]; 2102 TotalLexicalDeclContexts += Record[2]; 2103 TotalVisibleDeclContexts += Record[3]; 2104 break; 2105 2106 case TENTATIVE_DEFINITIONS: 2107 // Optimization for the first block. 2108 if (TentativeDefinitions.empty()) 2109 TentativeDefinitions.swap(Record); 2110 else 2111 TentativeDefinitions.insert(TentativeDefinitions.end(), 2112 Record.begin(), Record.end()); 2113 break; 2114 2115 case UNUSED_FILESCOPED_DECLS: 2116 // Optimization for the first block. 2117 if (UnusedFileScopedDecls.empty()) 2118 UnusedFileScopedDecls.swap(Record); 2119 else 2120 UnusedFileScopedDecls.insert(UnusedFileScopedDecls.end(), 2121 Record.begin(), Record.end()); 2122 break; 2123 2124 case WEAK_UNDECLARED_IDENTIFIERS: 2125 // Later blocks overwrite earlier ones. 2126 WeakUndeclaredIdentifiers.swap(Record); 2127 break; 2128 2129 case LOCALLY_SCOPED_EXTERNAL_DECLS: 2130 // Optimization for the first block. 2131 if (LocallyScopedExternalDecls.empty()) 2132 LocallyScopedExternalDecls.swap(Record); 2133 else 2134 LocallyScopedExternalDecls.insert(LocallyScopedExternalDecls.end(), 2135 Record.begin(), Record.end()); 2136 break; 2137 2138 case SELECTOR_OFFSETS: 2139 F.SelectorOffsets = (const uint32_t *)BlobStart; 2140 F.LocalNumSelectors = Record[0]; 2141 break; 2142 2143 case METHOD_POOL: 2144 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 2145 if (Record[0]) 2146 F.SelectorLookupTable 2147 = ASTSelectorLookupTable::Create( 2148 F.SelectorLookupTableData + Record[0], 2149 F.SelectorLookupTableData, 2150 ASTSelectorLookupTrait(*this)); 2151 TotalNumMethodPoolEntries += Record[1]; 2152 break; 2153 2154 case REFERENCED_SELECTOR_POOL: 2155 F.ReferencedSelectorsData.swap(Record); 2156 break; 2157 2158 case PP_COUNTER_VALUE: 2159 if (!Record.empty() && Listener) 2160 Listener->ReadCounter(Record[0]); 2161 break; 2162 2163 case SOURCE_LOCATION_OFFSETS: 2164 F.SLocOffsets = (const uint32_t *)BlobStart; 2165 F.LocalNumSLocEntries = Record[0]; 2166 F.LocalSLocSize = Record[1]; 2167 break; 2168 2169 case SOURCE_LOCATION_PRELOADS: 2170 if (PreloadSLocEntries.empty()) 2171 PreloadSLocEntries.swap(Record); 2172 else 2173 PreloadSLocEntries.insert(PreloadSLocEntries.end(), 2174 Record.begin(), Record.end()); 2175 break; 2176 2177 case STAT_CACHE: { 2178 if (!DisableStatCache) { 2179 ASTStatCache *MyStatCache = 2180 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2181 (const unsigned char *)BlobStart, 2182 NumStatHits, NumStatMisses); 2183 FileMgr.addStatCache(MyStatCache); 2184 F.StatCache = MyStatCache; 2185 } 2186 break; 2187 } 2188 2189 case EXT_VECTOR_DECLS: 2190 // Optimization for the first block. 2191 if (ExtVectorDecls.empty()) 2192 ExtVectorDecls.swap(Record); 2193 else 2194 ExtVectorDecls.insert(ExtVectorDecls.end(), 2195 Record.begin(), Record.end()); 2196 break; 2197 2198 case VTABLE_USES: 2199 // Later tables overwrite earlier ones. 2200 VTableUses.swap(Record); 2201 break; 2202 2203 case DYNAMIC_CLASSES: 2204 // Optimization for the first block. 2205 if (DynamicClasses.empty()) 2206 DynamicClasses.swap(Record); 2207 else 2208 DynamicClasses.insert(DynamicClasses.end(), 2209 Record.begin(), Record.end()); 2210 break; 2211 2212 case PENDING_IMPLICIT_INSTANTIATIONS: 2213 F.PendingInstantiations.swap(Record); 2214 break; 2215 2216 case SEMA_DECL_REFS: 2217 // Later tables overwrite earlier ones. 2218 SemaDeclRefs.swap(Record); 2219 break; 2220 2221 case ORIGINAL_FILE_NAME: 2222 // The primary AST will be the last to get here, so it will be the one 2223 // that's used. 2224 ActualOriginalFileName.assign(BlobStart, BlobLen); 2225 OriginalFileName = ActualOriginalFileName; 2226 MaybeAddSystemRootToFilename(OriginalFileName); 2227 break; 2228 2229 case ORIGINAL_PCH_DIR: 2230 // The primary AST will be the last to get here, so it will be the one 2231 // that's used. 2232 OriginalDir.assign(BlobStart, BlobLen); 2233 break; 2234 2235 case VERSION_CONTROL_BRANCH_REVISION: { 2236 const std::string &CurBranch = getClangFullRepositoryVersion(); 2237 llvm::StringRef ASTBranch(BlobStart, BlobLen); 2238 if (llvm::StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2239 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2240 return IgnorePCH; 2241 } 2242 break; 2243 } 2244 2245 case MACRO_DEFINITION_OFFSETS: 2246 F.MacroDefinitionOffsets = (const uint32_t *)BlobStart; 2247 F.NumPreallocatedPreprocessingEntities = Record[0]; 2248 F.LocalNumMacroDefinitions = Record[1]; 2249 break; 2250 2251 case DECL_UPDATE_OFFSETS: { 2252 if (Record.size() % 2 != 0) { 2253 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2254 return Failure; 2255 } 2256 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2257 DeclUpdateOffsets[static_cast<DeclID>(Record[I])] 2258 .push_back(std::make_pair(&F, Record[I+1])); 2259 break; 2260 } 2261 2262 case DECL_REPLACEMENTS: { 2263 if (Record.size() % 2 != 0) { 2264 Error("invalid DECL_REPLACEMENTS block in AST file"); 2265 return Failure; 2266 } 2267 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2268 ReplacedDecls[static_cast<DeclID>(Record[I])] = 2269 std::make_pair(&F, Record[I+1]); 2270 break; 2271 } 2272 2273 case CXX_BASE_SPECIFIER_OFFSETS: { 2274 if (F.LocalNumCXXBaseSpecifiers != 0) { 2275 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2276 return Failure; 2277 } 2278 2279 F.LocalNumCXXBaseSpecifiers = Record[0]; 2280 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2281 break; 2282 } 2283 2284 case DIAG_PRAGMA_MAPPINGS: 2285 if (Record.size() % 2 != 0) { 2286 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2287 return Failure; 2288 } 2289 if (PragmaDiagMappings.empty()) 2290 PragmaDiagMappings.swap(Record); 2291 else 2292 PragmaDiagMappings.insert(PragmaDiagMappings.end(), 2293 Record.begin(), Record.end()); 2294 break; 2295 2296 case CUDA_SPECIAL_DECL_REFS: 2297 // Later tables overwrite earlier ones. 2298 CUDASpecialDeclRefs.swap(Record); 2299 break; 2300 2301 case HEADER_SEARCH_TABLE: 2302 F.HeaderFileInfoTableData = BlobStart; 2303 F.LocalNumHeaderFileInfos = Record[1]; 2304 if (Record[0]) { 2305 F.HeaderFileInfoTable 2306 = HeaderFileInfoLookupTable::Create( 2307 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2308 (const unsigned char *)F.HeaderFileInfoTableData); 2309 if (PP) 2310 PP->getHeaderSearchInfo().SetExternalSource(this); 2311 } 2312 break; 2313 2314 case FP_PRAGMA_OPTIONS: 2315 // Later tables overwrite earlier ones. 2316 FPPragmaOptions.swap(Record); 2317 break; 2318 2319 case OPENCL_EXTENSIONS: 2320 // Later tables overwrite earlier ones. 2321 OpenCLExtensions.swap(Record); 2322 break; 2323 } 2324 First = false; 2325 } 2326 Error("premature end of bitstream in AST file"); 2327 return Failure; 2328} 2329 2330ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2331 ASTFileType Type) { 2332 switch(ReadASTCore(FileName, Type)) { 2333 case Failure: return Failure; 2334 case IgnorePCH: return IgnorePCH; 2335 case Success: break; 2336 } 2337 2338 // Here comes stuff that we only do once the entire chain is loaded. 2339 2340 // Allocate space for loaded slocentries, identifiers, decls and types. 2341 unsigned TotalNumIdentifiers = 0, TotalNumTypes = 0, TotalNumDecls = 0, 2342 TotalNumPreallocatedPreprocessingEntities = 0, TotalNumMacroDefs = 0, 2343 TotalNumSelectors = 0; 2344 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2345 TotalNumSLocEntries += Chain[I]->LocalNumSLocEntries; 2346 NextSLocOffset += Chain[I]->LocalSLocSize; 2347 TotalNumIdentifiers += Chain[I]->LocalNumIdentifiers; 2348 TotalNumTypes += Chain[I]->LocalNumTypes; 2349 TotalNumDecls += Chain[I]->LocalNumDecls; 2350 TotalNumPreallocatedPreprocessingEntities += 2351 Chain[I]->NumPreallocatedPreprocessingEntities; 2352 TotalNumMacroDefs += Chain[I]->LocalNumMacroDefinitions; 2353 TotalNumSelectors += Chain[I]->LocalNumSelectors; 2354 } 2355 SourceMgr.PreallocateSLocEntries(this, TotalNumSLocEntries, NextSLocOffset); 2356 IdentifiersLoaded.resize(TotalNumIdentifiers); 2357 TypesLoaded.resize(TotalNumTypes); 2358 DeclsLoaded.resize(TotalNumDecls); 2359 MacroDefinitionsLoaded.resize(TotalNumMacroDefs); 2360 if (PP) { 2361 if (TotalNumIdentifiers > 0) 2362 PP->getHeaderSearchInfo().SetExternalLookup(this); 2363 if (TotalNumPreallocatedPreprocessingEntities > 0) { 2364 if (!PP->getPreprocessingRecord()) 2365 PP->createPreprocessingRecord(); 2366 PP->getPreprocessingRecord()->SetExternalSource(*this, 2367 TotalNumPreallocatedPreprocessingEntities); 2368 } 2369 } 2370 SelectorsLoaded.resize(TotalNumSelectors); 2371 // Preload SLocEntries. 2372 for (unsigned I = 0, N = PreloadSLocEntries.size(); I != N; ++I) { 2373 ASTReadResult Result = ReadSLocEntryRecord(PreloadSLocEntries[I]); 2374 if (Result != Success) 2375 return Result; 2376 } 2377 2378 // Check the predefines buffers. 2379 if (!DisableValidation && CheckPredefinesBuffers()) 2380 return IgnorePCH; 2381 2382 if (PP) { 2383 // Initialization of keywords and pragmas occurs before the 2384 // AST file is read, so there may be some identifiers that were 2385 // loaded into the IdentifierTable before we intercepted the 2386 // creation of identifiers. Iterate through the list of known 2387 // identifiers and determine whether we have to establish 2388 // preprocessor definitions or top-level identifier declaration 2389 // chains for those identifiers. 2390 // 2391 // We copy the IdentifierInfo pointers to a small vector first, 2392 // since de-serializing declarations or macro definitions can add 2393 // new entries into the identifier table, invalidating the 2394 // iterators. 2395 llvm::SmallVector<IdentifierInfo *, 128> Identifiers; 2396 for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(), 2397 IdEnd = PP->getIdentifierTable().end(); 2398 Id != IdEnd; ++Id) 2399 Identifiers.push_back(Id->second); 2400 // We need to search the tables in all files. 2401 for (unsigned J = 0, M = Chain.size(); J != M; ++J) { 2402 ASTIdentifierLookupTable *IdTable 2403 = (ASTIdentifierLookupTable *)Chain[J]->IdentifierLookupTable; 2404 // Not all AST files necessarily have identifier tables, only the useful 2405 // ones. 2406 if (!IdTable) 2407 continue; 2408 for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { 2409 IdentifierInfo *II = Identifiers[I]; 2410 // Look in the on-disk hash tables for an entry for this identifier 2411 ASTIdentifierLookupTrait Info(*this, *Chain[J], II); 2412 std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength()); 2413 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info); 2414 if (Pos == IdTable->end()) 2415 continue; 2416 2417 // Dereferencing the iterator has the effect of populating the 2418 // IdentifierInfo node with the various declarations it needs. 2419 (void)*Pos; 2420 } 2421 } 2422 } 2423 2424 if (Context) 2425 InitializeContext(*Context); 2426 2427 if (DeserializationListener) 2428 DeserializationListener->ReaderInitialized(this); 2429 2430 // If this AST file is a precompiled preamble, then set the main file ID of 2431 // the source manager to the file source file from which the preamble was 2432 // built. This is the only valid way to use a precompiled preamble. 2433 if (Type == Preamble) { 2434 SourceLocation Loc 2435 = SourceMgr.getLocation(FileMgr.getFile(getOriginalSourceFile()), 1, 1); 2436 if (Loc.isValid()) { 2437 std::pair<FileID, unsigned> Decomposed = SourceMgr.getDecomposedLoc(Loc); 2438 SourceMgr.SetPreambleFileID(Decomposed.first); 2439 } 2440 } 2441 2442 return Success; 2443} 2444 2445ASTReader::ASTReadResult ASTReader::ReadASTCore(llvm::StringRef FileName, 2446 ASTFileType Type) { 2447 PerFileData *Prev = Chain.empty() ? 0 : Chain.back(); 2448 Chain.push_back(new PerFileData(Type)); 2449 PerFileData &F = *Chain.back(); 2450 if (Prev) 2451 Prev->NextInSource = &F; 2452 else 2453 FirstInSource = &F; 2454 F.Loaders.push_back(Prev); 2455 2456 // Set the AST file name. 2457 F.FileName = FileName; 2458 2459 if (FileName != "-") { 2460 CurrentDir = llvm::sys::path::parent_path(FileName); 2461 if (CurrentDir.empty()) CurrentDir = "."; 2462 } 2463 2464 // Open the AST file. 2465 // 2466 // FIXME: This shouldn't be here, we should just take a raw_ostream. 2467 std::string ErrStr; 2468 llvm::error_code ec; 2469 if (FileName == "-") { 2470 ec = llvm::MemoryBuffer::getSTDIN(F.Buffer); 2471 if (ec) 2472 ErrStr = ec.message(); 2473 } else 2474 F.Buffer.reset(FileMgr.getBufferForFile(FileName, &ErrStr)); 2475 if (!F.Buffer) { 2476 Error(ErrStr.c_str()); 2477 return IgnorePCH; 2478 } 2479 2480 // Initialize the stream 2481 F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), 2482 (const unsigned char *)F.Buffer->getBufferEnd()); 2483 llvm::BitstreamCursor &Stream = F.Stream; 2484 Stream.init(F.StreamFile); 2485 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2486 2487 // Sniff for the signature. 2488 if (Stream.Read(8) != 'C' || 2489 Stream.Read(8) != 'P' || 2490 Stream.Read(8) != 'C' || 2491 Stream.Read(8) != 'H') { 2492 Diag(diag::err_not_a_pch_file) << FileName; 2493 return Failure; 2494 } 2495 2496 while (!Stream.AtEndOfStream()) { 2497 unsigned Code = Stream.ReadCode(); 2498 2499 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2500 Error("invalid record at top-level of AST file"); 2501 return Failure; 2502 } 2503 2504 unsigned BlockID = Stream.ReadSubBlockID(); 2505 2506 // We only know the AST subblock ID. 2507 switch (BlockID) { 2508 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2509 if (Stream.ReadBlockInfoBlock()) { 2510 Error("malformed BlockInfoBlock in AST file"); 2511 return Failure; 2512 } 2513 break; 2514 case AST_BLOCK_ID: 2515 switch (ReadASTBlock(F)) { 2516 case Success: 2517 break; 2518 2519 case Failure: 2520 return Failure; 2521 2522 case IgnorePCH: 2523 // FIXME: We could consider reading through to the end of this 2524 // AST block, skipping subblocks, to see if there are other 2525 // AST blocks elsewhere. 2526 2527 // Clear out any preallocated source location entries, so that 2528 // the source manager does not try to resolve them later. 2529 SourceMgr.ClearPreallocatedSLocEntries(); 2530 2531 // Remove the stat cache. 2532 if (F.StatCache) 2533 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2534 2535 return IgnorePCH; 2536 } 2537 break; 2538 default: 2539 if (Stream.SkipBlock()) { 2540 Error("malformed block record in AST file"); 2541 return Failure; 2542 } 2543 break; 2544 } 2545 } 2546 2547 return Success; 2548} 2549 2550void ASTReader::setPreprocessor(Preprocessor &pp) { 2551 PP = &pp; 2552 2553 unsigned TotalNum = 0; 2554 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 2555 TotalNum += Chain[I]->NumPreallocatedPreprocessingEntities; 2556 if (TotalNum) { 2557 if (!PP->getPreprocessingRecord()) 2558 PP->createPreprocessingRecord(); 2559 PP->getPreprocessingRecord()->SetExternalSource(*this, TotalNum); 2560 } 2561} 2562 2563void ASTReader::InitializeContext(ASTContext &Ctx) { 2564 Context = &Ctx; 2565 assert(Context && "Passed null context!"); 2566 2567 assert(PP && "Forgot to set Preprocessor ?"); 2568 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2569 PP->getHeaderSearchInfo().SetExternalLookup(this); 2570 PP->setExternalSource(this); 2571 PP->getHeaderSearchInfo().SetExternalSource(this); 2572 2573 // If we have an update block for the TU waiting, we have to add it before 2574 // deserializing the decl. 2575 DeclContextOffsetsMap::iterator DCU = DeclContextOffsets.find(0); 2576 if (DCU != DeclContextOffsets.end()) { 2577 // Insertion could invalidate map, so grab vector. 2578 DeclContextInfos T; 2579 T.swap(DCU->second); 2580 DeclContextOffsets.erase(DCU); 2581 DeclContextOffsets[Ctx.getTranslationUnitDecl()].swap(T); 2582 } 2583 2584 // Load the translation unit declaration 2585 GetTranslationUnitDecl(); 2586 2587 // Load the special types. 2588 Context->setBuiltinVaListType( 2589 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2590 if (unsigned Id = SpecialTypes[SPECIAL_TYPE_OBJC_ID]) 2591 Context->setObjCIdType(GetType(Id)); 2592 if (unsigned Sel = SpecialTypes[SPECIAL_TYPE_OBJC_SELECTOR]) 2593 Context->setObjCSelType(GetType(Sel)); 2594 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) 2595 Context->setObjCProtoType(GetType(Proto)); 2596 if (unsigned Class = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS]) 2597 Context->setObjCClassType(GetType(Class)); 2598 2599 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) 2600 Context->setCFConstantStringType(GetType(String)); 2601 if (unsigned FastEnum 2602 = SpecialTypes[SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE]) 2603 Context->setObjCFastEnumerationStateType(GetType(FastEnum)); 2604 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2605 QualType FileType = GetType(File); 2606 if (FileType.isNull()) { 2607 Error("FILE type is NULL"); 2608 return; 2609 } 2610 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2611 Context->setFILEDecl(Typedef->getDecl()); 2612 else { 2613 const TagType *Tag = FileType->getAs<TagType>(); 2614 if (!Tag) { 2615 Error("Invalid FILE type in AST file"); 2616 return; 2617 } 2618 Context->setFILEDecl(Tag->getDecl()); 2619 } 2620 } 2621 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 2622 QualType Jmp_bufType = GetType(Jmp_buf); 2623 if (Jmp_bufType.isNull()) { 2624 Error("jmp_bug type is NULL"); 2625 return; 2626 } 2627 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 2628 Context->setjmp_bufDecl(Typedef->getDecl()); 2629 else { 2630 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 2631 if (!Tag) { 2632 Error("Invalid jmp_buf type in AST file"); 2633 return; 2634 } 2635 Context->setjmp_bufDecl(Tag->getDecl()); 2636 } 2637 } 2638 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 2639 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 2640 if (Sigjmp_bufType.isNull()) { 2641 Error("sigjmp_buf type is NULL"); 2642 return; 2643 } 2644 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 2645 Context->setsigjmp_bufDecl(Typedef->getDecl()); 2646 else { 2647 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 2648 assert(Tag && "Invalid sigjmp_buf type in AST file"); 2649 Context->setsigjmp_bufDecl(Tag->getDecl()); 2650 } 2651 } 2652 if (unsigned ObjCIdRedef 2653 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) 2654 Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); 2655 if (unsigned ObjCClassRedef 2656 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) 2657 Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); 2658 if (unsigned String = SpecialTypes[SPECIAL_TYPE_BLOCK_DESCRIPTOR]) 2659 Context->setBlockDescriptorType(GetType(String)); 2660 if (unsigned String 2661 = SpecialTypes[SPECIAL_TYPE_BLOCK_EXTENDED_DESCRIPTOR]) 2662 Context->setBlockDescriptorExtendedType(GetType(String)); 2663 if (unsigned ObjCSelRedef 2664 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) 2665 Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); 2666 if (unsigned String = SpecialTypes[SPECIAL_TYPE_NS_CONSTANT_STRING]) 2667 Context->setNSConstantStringType(GetType(String)); 2668 2669 if (SpecialTypes[SPECIAL_TYPE_INT128_INSTALLED]) 2670 Context->setInt128Installed(); 2671 2672 ReadPragmaDiagnosticMappings(Context->getDiagnostics()); 2673 2674 // If there were any CUDA special declarations, deserialize them. 2675 if (!CUDASpecialDeclRefs.empty()) { 2676 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 2677 Context->setcudaConfigureCallDecl( 2678 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 2679 } 2680} 2681 2682/// \brief Retrieve the name of the original source file name 2683/// directly from the AST file, without actually loading the AST 2684/// file. 2685std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 2686 FileManager &FileMgr, 2687 Diagnostic &Diags) { 2688 // Open the AST file. 2689 std::string ErrStr; 2690 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 2691 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 2692 if (!Buffer) { 2693 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 2694 return std::string(); 2695 } 2696 2697 // Initialize the stream 2698 llvm::BitstreamReader StreamFile; 2699 llvm::BitstreamCursor Stream; 2700 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 2701 (const unsigned char *)Buffer->getBufferEnd()); 2702 Stream.init(StreamFile); 2703 2704 // Sniff for the signature. 2705 if (Stream.Read(8) != 'C' || 2706 Stream.Read(8) != 'P' || 2707 Stream.Read(8) != 'C' || 2708 Stream.Read(8) != 'H') { 2709 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 2710 return std::string(); 2711 } 2712 2713 RecordData Record; 2714 while (!Stream.AtEndOfStream()) { 2715 unsigned Code = Stream.ReadCode(); 2716 2717 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 2718 unsigned BlockID = Stream.ReadSubBlockID(); 2719 2720 // We only know the AST subblock ID. 2721 switch (BlockID) { 2722 case AST_BLOCK_ID: 2723 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 2724 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2725 return std::string(); 2726 } 2727 break; 2728 2729 default: 2730 if (Stream.SkipBlock()) { 2731 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2732 return std::string(); 2733 } 2734 break; 2735 } 2736 continue; 2737 } 2738 2739 if (Code == llvm::bitc::END_BLOCK) { 2740 if (Stream.ReadBlockEnd()) { 2741 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 2742 return std::string(); 2743 } 2744 continue; 2745 } 2746 2747 if (Code == llvm::bitc::DEFINE_ABBREV) { 2748 Stream.ReadAbbrevRecord(); 2749 continue; 2750 } 2751 2752 Record.clear(); 2753 const char *BlobStart = 0; 2754 unsigned BlobLen = 0; 2755 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 2756 == ORIGINAL_FILE_NAME) 2757 return std::string(BlobStart, BlobLen); 2758 } 2759 2760 return std::string(); 2761} 2762 2763/// \brief Parse the record that corresponds to a LangOptions data 2764/// structure. 2765/// 2766/// This routine parses the language options from the AST file and then gives 2767/// them to the AST listener if one is set. 2768/// 2769/// \returns true if the listener deems the file unacceptable, false otherwise. 2770bool ASTReader::ParseLanguageOptions( 2771 const llvm::SmallVectorImpl<uint64_t> &Record) { 2772 if (Listener) { 2773 LangOptions LangOpts; 2774 2775 #define PARSE_LANGOPT(Option) \ 2776 LangOpts.Option = Record[Idx]; \ 2777 ++Idx 2778 2779 unsigned Idx = 0; 2780 PARSE_LANGOPT(Trigraphs); 2781 PARSE_LANGOPT(BCPLComment); 2782 PARSE_LANGOPT(DollarIdents); 2783 PARSE_LANGOPT(AsmPreprocessor); 2784 PARSE_LANGOPT(GNUMode); 2785 PARSE_LANGOPT(GNUKeywords); 2786 PARSE_LANGOPT(ImplicitInt); 2787 PARSE_LANGOPT(Digraphs); 2788 PARSE_LANGOPT(HexFloats); 2789 PARSE_LANGOPT(C99); 2790 PARSE_LANGOPT(Microsoft); 2791 PARSE_LANGOPT(CPlusPlus); 2792 PARSE_LANGOPT(CPlusPlus0x); 2793 PARSE_LANGOPT(CXXOperatorNames); 2794 PARSE_LANGOPT(ObjC1); 2795 PARSE_LANGOPT(ObjC2); 2796 PARSE_LANGOPT(ObjCNonFragileABI); 2797 PARSE_LANGOPT(ObjCNonFragileABI2); 2798 PARSE_LANGOPT(AppleKext); 2799 PARSE_LANGOPT(ObjCDefaultSynthProperties); 2800 PARSE_LANGOPT(NoConstantCFStrings); 2801 PARSE_LANGOPT(PascalStrings); 2802 PARSE_LANGOPT(WritableStrings); 2803 PARSE_LANGOPT(LaxVectorConversions); 2804 PARSE_LANGOPT(AltiVec); 2805 PARSE_LANGOPT(Exceptions); 2806 PARSE_LANGOPT(ObjCExceptions); 2807 PARSE_LANGOPT(CXXExceptions); 2808 PARSE_LANGOPT(SjLjExceptions); 2809 PARSE_LANGOPT(MSBitfields); 2810 PARSE_LANGOPT(NeXTRuntime); 2811 PARSE_LANGOPT(Freestanding); 2812 PARSE_LANGOPT(NoBuiltin); 2813 PARSE_LANGOPT(ThreadsafeStatics); 2814 PARSE_LANGOPT(POSIXThreads); 2815 PARSE_LANGOPT(Blocks); 2816 PARSE_LANGOPT(EmitAllDecls); 2817 PARSE_LANGOPT(MathErrno); 2818 LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) 2819 Record[Idx++]); 2820 PARSE_LANGOPT(HeinousExtensions); 2821 PARSE_LANGOPT(Optimize); 2822 PARSE_LANGOPT(OptimizeSize); 2823 PARSE_LANGOPT(Static); 2824 PARSE_LANGOPT(PICLevel); 2825 PARSE_LANGOPT(GNUInline); 2826 PARSE_LANGOPT(NoInline); 2827 PARSE_LANGOPT(AccessControl); 2828 PARSE_LANGOPT(CharIsSigned); 2829 PARSE_LANGOPT(ShortWChar); 2830 PARSE_LANGOPT(ShortEnums); 2831 LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); 2832 LangOpts.setVisibilityMode((Visibility)Record[Idx++]); 2833 LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) 2834 Record[Idx++]); 2835 PARSE_LANGOPT(InstantiationDepth); 2836 PARSE_LANGOPT(OpenCL); 2837 PARSE_LANGOPT(CUDA); 2838 PARSE_LANGOPT(CatchUndefined); 2839 PARSE_LANGOPT(DefaultFPContract); 2840 // FIXME: Missing ElideConstructors?! 2841 #undef PARSE_LANGOPT 2842 2843 return Listener->ReadLanguageOptions(LangOpts); 2844 } 2845 2846 return false; 2847} 2848 2849void ASTReader::ReadPreprocessedEntities() { 2850 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2851 PerFileData &F = *Chain[I]; 2852 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 2853 continue; 2854 2855 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 2856 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 2857 while (LoadPreprocessedEntity(F)) { } 2858 } 2859} 2860 2861PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 2862 PerFileData *F = 0; 2863 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2864 if (Offset < Chain[I]->SizeInBits) { 2865 F = Chain[I]; 2866 break; 2867 } 2868 2869 Offset -= Chain[I]->SizeInBits; 2870 } 2871 2872 if (!F) { 2873 Error("Malformed preprocessed entity offset"); 2874 return 0; 2875 } 2876 2877 // Keep track of where we are in the stream, then jump back there 2878 // after reading this entity. 2879 SavedStreamPosition SavedPosition(F->PreprocessorDetailCursor); 2880 F->PreprocessorDetailCursor.JumpToBit(Offset); 2881 return LoadPreprocessedEntity(*F); 2882} 2883 2884HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 2885 HeaderFileInfoTrait Trait(FE->getName()); 2886 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2887 PerFileData &F = *Chain[I]; 2888 HeaderFileInfoLookupTable *Table 2889 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 2890 if (!Table) 2891 continue; 2892 2893 // Look in the on-disk hash table for an entry for this file name. 2894 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 2895 &Trait); 2896 if (Pos == Table->end()) 2897 continue; 2898 2899 HeaderFileInfo HFI = *Pos; 2900 if (Listener) 2901 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 2902 2903 return HFI; 2904 } 2905 2906 return HeaderFileInfo(); 2907} 2908 2909void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 2910 unsigned Idx = 0; 2911 while (Idx < PragmaDiagMappings.size()) { 2912 SourceLocation 2913 Loc = SourceLocation::getFromRawEncoding(PragmaDiagMappings[Idx++]); 2914 while (1) { 2915 assert(Idx < PragmaDiagMappings.size() && 2916 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 2917 if (Idx >= PragmaDiagMappings.size()) 2918 break; // Something is messed up but at least avoid infinite loop in 2919 // release build. 2920 unsigned DiagID = PragmaDiagMappings[Idx++]; 2921 if (DiagID == (unsigned)-1) 2922 break; // no more diag/map pairs for this location. 2923 diag::Mapping Map = (diag::Mapping)PragmaDiagMappings[Idx++]; 2924 Diag.setDiagnosticMapping(DiagID, Map, Loc); 2925 } 2926 } 2927} 2928 2929/// \brief Get the correct cursor and offset for loading a type. 2930ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 2931 PerFileData *F = 0; 2932 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2933 F = Chain[N - I - 1]; 2934 if (Index < F->LocalNumTypes) 2935 break; 2936 Index -= F->LocalNumTypes; 2937 } 2938 assert(F && F->LocalNumTypes > Index && "Broken chain"); 2939 return RecordLocation(F, F->TypeOffsets[Index]); 2940} 2941 2942/// \brief Read and return the type with the given index.. 2943/// 2944/// The index is the type ID, shifted and minus the number of predefs. This 2945/// routine actually reads the record corresponding to the type at the given 2946/// location. It is a helper routine for GetType, which deals with reading type 2947/// IDs. 2948QualType ASTReader::ReadTypeRecord(unsigned Index) { 2949 RecordLocation Loc = TypeCursorForIndex(Index); 2950 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 2951 2952 // Keep track of where we are in the stream, then jump back there 2953 // after reading this type. 2954 SavedStreamPosition SavedPosition(DeclsCursor); 2955 2956 ReadingKindTracker ReadingKind(Read_Type, *this); 2957 2958 // Note that we are loading a type record. 2959 Deserializing AType(this); 2960 2961 DeclsCursor.JumpToBit(Loc.Offset); 2962 RecordData Record; 2963 unsigned Code = DeclsCursor.ReadCode(); 2964 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 2965 case TYPE_EXT_QUAL: { 2966 if (Record.size() != 2) { 2967 Error("Incorrect encoding of extended qualifier type"); 2968 return QualType(); 2969 } 2970 QualType Base = GetType(Record[0]); 2971 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]); 2972 return Context->getQualifiedType(Base, Quals); 2973 } 2974 2975 case TYPE_COMPLEX: { 2976 if (Record.size() != 1) { 2977 Error("Incorrect encoding of complex type"); 2978 return QualType(); 2979 } 2980 QualType ElemType = GetType(Record[0]); 2981 return Context->getComplexType(ElemType); 2982 } 2983 2984 case TYPE_POINTER: { 2985 if (Record.size() != 1) { 2986 Error("Incorrect encoding of pointer type"); 2987 return QualType(); 2988 } 2989 QualType PointeeType = GetType(Record[0]); 2990 return Context->getPointerType(PointeeType); 2991 } 2992 2993 case TYPE_BLOCK_POINTER: { 2994 if (Record.size() != 1) { 2995 Error("Incorrect encoding of block pointer type"); 2996 return QualType(); 2997 } 2998 QualType PointeeType = GetType(Record[0]); 2999 return Context->getBlockPointerType(PointeeType); 3000 } 3001 3002 case TYPE_LVALUE_REFERENCE: { 3003 if (Record.size() != 1) { 3004 Error("Incorrect encoding of lvalue reference type"); 3005 return QualType(); 3006 } 3007 QualType PointeeType = GetType(Record[0]); 3008 return Context->getLValueReferenceType(PointeeType); 3009 } 3010 3011 case TYPE_RVALUE_REFERENCE: { 3012 if (Record.size() != 1) { 3013 Error("Incorrect encoding of rvalue reference type"); 3014 return QualType(); 3015 } 3016 QualType PointeeType = GetType(Record[0]); 3017 return Context->getRValueReferenceType(PointeeType); 3018 } 3019 3020 case TYPE_MEMBER_POINTER: { 3021 if (Record.size() != 2) { 3022 Error("Incorrect encoding of member pointer type"); 3023 return QualType(); 3024 } 3025 QualType PointeeType = GetType(Record[0]); 3026 QualType ClassType = GetType(Record[1]); 3027 if (PointeeType.isNull() || ClassType.isNull()) 3028 return QualType(); 3029 3030 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3031 } 3032 3033 case TYPE_CONSTANT_ARRAY: { 3034 QualType ElementType = GetType(Record[0]); 3035 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3036 unsigned IndexTypeQuals = Record[2]; 3037 unsigned Idx = 3; 3038 llvm::APInt Size = ReadAPInt(Record, Idx); 3039 return Context->getConstantArrayType(ElementType, Size, 3040 ASM, IndexTypeQuals); 3041 } 3042 3043 case TYPE_INCOMPLETE_ARRAY: { 3044 QualType ElementType = GetType(Record[0]); 3045 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3046 unsigned IndexTypeQuals = Record[2]; 3047 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3048 } 3049 3050 case TYPE_VARIABLE_ARRAY: { 3051 QualType ElementType = GetType(Record[0]); 3052 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3053 unsigned IndexTypeQuals = Record[2]; 3054 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3055 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3056 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3057 ASM, IndexTypeQuals, 3058 SourceRange(LBLoc, RBLoc)); 3059 } 3060 3061 case TYPE_VECTOR: { 3062 if (Record.size() != 3) { 3063 Error("incorrect encoding of vector type in AST file"); 3064 return QualType(); 3065 } 3066 3067 QualType ElementType = GetType(Record[0]); 3068 unsigned NumElements = Record[1]; 3069 unsigned VecKind = Record[2]; 3070 return Context->getVectorType(ElementType, NumElements, 3071 (VectorType::VectorKind)VecKind); 3072 } 3073 3074 case TYPE_EXT_VECTOR: { 3075 if (Record.size() != 3) { 3076 Error("incorrect encoding of extended vector type in AST file"); 3077 return QualType(); 3078 } 3079 3080 QualType ElementType = GetType(Record[0]); 3081 unsigned NumElements = Record[1]; 3082 return Context->getExtVectorType(ElementType, NumElements); 3083 } 3084 3085 case TYPE_FUNCTION_NO_PROTO: { 3086 if (Record.size() != 4) { 3087 Error("incorrect encoding of no-proto function type"); 3088 return QualType(); 3089 } 3090 QualType ResultType = GetType(Record[0]); 3091 FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]); 3092 return Context->getFunctionNoProtoType(ResultType, Info); 3093 } 3094 3095 case TYPE_FUNCTION_PROTO: { 3096 QualType ResultType = GetType(Record[0]); 3097 3098 FunctionProtoType::ExtProtoInfo EPI; 3099 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3100 /*regparm*/ Record[2], 3101 static_cast<CallingConv>(Record[3])); 3102 3103 unsigned Idx = 4; 3104 unsigned NumParams = Record[Idx++]; 3105 llvm::SmallVector<QualType, 16> ParamTypes; 3106 for (unsigned I = 0; I != NumParams; ++I) 3107 ParamTypes.push_back(GetType(Record[Idx++])); 3108 3109 EPI.Variadic = Record[Idx++]; 3110 EPI.TypeQuals = Record[Idx++]; 3111 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3112 EPI.HasExceptionSpec = Record[Idx++]; 3113 EPI.HasAnyExceptionSpec = Record[Idx++]; 3114 EPI.NumExceptions = Record[Idx++]; 3115 llvm::SmallVector<QualType, 2> Exceptions; 3116 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3117 Exceptions.push_back(GetType(Record[Idx++])); 3118 EPI.Exceptions = Exceptions.data(); 3119 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3120 EPI); 3121 } 3122 3123 case TYPE_UNRESOLVED_USING: 3124 return Context->getTypeDeclType( 3125 cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0]))); 3126 3127 case TYPE_TYPEDEF: { 3128 if (Record.size() != 2) { 3129 Error("incorrect encoding of typedef type"); 3130 return QualType(); 3131 } 3132 TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0])); 3133 QualType Canonical = GetType(Record[1]); 3134 if (!Canonical.isNull()) 3135 Canonical = Context->getCanonicalType(Canonical); 3136 return Context->getTypedefType(Decl, Canonical); 3137 } 3138 3139 case TYPE_TYPEOF_EXPR: 3140 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3141 3142 case TYPE_TYPEOF: { 3143 if (Record.size() != 1) { 3144 Error("incorrect encoding of typeof(type) in AST file"); 3145 return QualType(); 3146 } 3147 QualType UnderlyingType = GetType(Record[0]); 3148 return Context->getTypeOfType(UnderlyingType); 3149 } 3150 3151 case TYPE_DECLTYPE: 3152 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3153 3154 case TYPE_AUTO: 3155 return Context->getAutoType(GetType(Record[0])); 3156 3157 case TYPE_RECORD: { 3158 if (Record.size() != 2) { 3159 Error("incorrect encoding of record type"); 3160 return QualType(); 3161 } 3162 bool IsDependent = Record[0]; 3163 QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1]))); 3164 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3165 return T; 3166 } 3167 3168 case TYPE_ENUM: { 3169 if (Record.size() != 2) { 3170 Error("incorrect encoding of enum type"); 3171 return QualType(); 3172 } 3173 bool IsDependent = Record[0]; 3174 QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1]))); 3175 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3176 return T; 3177 } 3178 3179 case TYPE_ATTRIBUTED: { 3180 if (Record.size() != 3) { 3181 Error("incorrect encoding of attributed type"); 3182 return QualType(); 3183 } 3184 QualType modifiedType = GetType(Record[0]); 3185 QualType equivalentType = GetType(Record[1]); 3186 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3187 return Context->getAttributedType(kind, modifiedType, equivalentType); 3188 } 3189 3190 case TYPE_PAREN: { 3191 if (Record.size() != 1) { 3192 Error("incorrect encoding of paren type"); 3193 return QualType(); 3194 } 3195 QualType InnerType = GetType(Record[0]); 3196 return Context->getParenType(InnerType); 3197 } 3198 3199 case TYPE_PACK_EXPANSION: { 3200 if (Record.size() != 2) { 3201 Error("incorrect encoding of pack expansion type"); 3202 return QualType(); 3203 } 3204 QualType Pattern = GetType(Record[0]); 3205 if (Pattern.isNull()) 3206 return QualType(); 3207 llvm::Optional<unsigned> NumExpansions; 3208 if (Record[1]) 3209 NumExpansions = Record[1] - 1; 3210 return Context->getPackExpansionType(Pattern, NumExpansions); 3211 } 3212 3213 case TYPE_ELABORATED: { 3214 unsigned Idx = 0; 3215 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3216 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3217 QualType NamedType = GetType(Record[Idx++]); 3218 return Context->getElaboratedType(Keyword, NNS, NamedType); 3219 } 3220 3221 case TYPE_OBJC_INTERFACE: { 3222 unsigned Idx = 0; 3223 ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++])); 3224 return Context->getObjCInterfaceType(ItfD); 3225 } 3226 3227 case TYPE_OBJC_OBJECT: { 3228 unsigned Idx = 0; 3229 QualType Base = GetType(Record[Idx++]); 3230 unsigned NumProtos = Record[Idx++]; 3231 llvm::SmallVector<ObjCProtocolDecl*, 4> Protos; 3232 for (unsigned I = 0; I != NumProtos; ++I) 3233 Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++]))); 3234 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3235 } 3236 3237 case TYPE_OBJC_OBJECT_POINTER: { 3238 unsigned Idx = 0; 3239 QualType Pointee = GetType(Record[Idx++]); 3240 return Context->getObjCObjectPointerType(Pointee); 3241 } 3242 3243 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3244 unsigned Idx = 0; 3245 QualType Parm = GetType(Record[Idx++]); 3246 QualType Replacement = GetType(Record[Idx++]); 3247 return 3248 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3249 Replacement); 3250 } 3251 3252 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3253 unsigned Idx = 0; 3254 QualType Parm = GetType(Record[Idx++]); 3255 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3256 return Context->getSubstTemplateTypeParmPackType( 3257 cast<TemplateTypeParmType>(Parm), 3258 ArgPack); 3259 } 3260 3261 case TYPE_INJECTED_CLASS_NAME: { 3262 CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0])); 3263 QualType TST = GetType(Record[1]); // probably derivable 3264 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3265 // for AST reading, too much interdependencies. 3266 return 3267 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3268 } 3269 3270 case TYPE_TEMPLATE_TYPE_PARM: { 3271 unsigned Idx = 0; 3272 unsigned Depth = Record[Idx++]; 3273 unsigned Index = Record[Idx++]; 3274 bool Pack = Record[Idx++]; 3275 IdentifierInfo *Name = GetIdentifierInfo(Record, Idx); 3276 return Context->getTemplateTypeParmType(Depth, Index, Pack, Name); 3277 } 3278 3279 case TYPE_DEPENDENT_NAME: { 3280 unsigned Idx = 0; 3281 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3282 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3283 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3284 QualType Canon = GetType(Record[Idx++]); 3285 if (!Canon.isNull()) 3286 Canon = Context->getCanonicalType(Canon); 3287 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3288 } 3289 3290 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3291 unsigned Idx = 0; 3292 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3293 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3294 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3295 unsigned NumArgs = Record[Idx++]; 3296 llvm::SmallVector<TemplateArgument, 8> Args; 3297 Args.reserve(NumArgs); 3298 while (NumArgs--) 3299 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3300 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3301 Args.size(), Args.data()); 3302 } 3303 3304 case TYPE_DEPENDENT_SIZED_ARRAY: { 3305 unsigned Idx = 0; 3306 3307 // ArrayType 3308 QualType ElementType = GetType(Record[Idx++]); 3309 ArrayType::ArraySizeModifier ASM 3310 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3311 unsigned IndexTypeQuals = Record[Idx++]; 3312 3313 // DependentSizedArrayType 3314 Expr *NumElts = ReadExpr(*Loc.F); 3315 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3316 3317 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3318 IndexTypeQuals, Brackets); 3319 } 3320 3321 case TYPE_TEMPLATE_SPECIALIZATION: { 3322 unsigned Idx = 0; 3323 bool IsDependent = Record[Idx++]; 3324 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3325 llvm::SmallVector<TemplateArgument, 8> Args; 3326 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3327 QualType Canon = GetType(Record[Idx++]); 3328 QualType T; 3329 if (Canon.isNull()) 3330 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3331 Args.size()); 3332 else 3333 T = Context->getTemplateSpecializationType(Name, Args.data(), 3334 Args.size(), Canon); 3335 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3336 return T; 3337 } 3338 } 3339 // Suppress a GCC warning 3340 return QualType(); 3341} 3342 3343class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3344 ASTReader &Reader; 3345 ASTReader::PerFileData &F; 3346 llvm::BitstreamCursor &DeclsCursor; 3347 const ASTReader::RecordData &Record; 3348 unsigned &Idx; 3349 3350 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3351 unsigned &I) { 3352 return Reader.ReadSourceLocation(F, R, I); 3353 } 3354 3355public: 3356 TypeLocReader(ASTReader &Reader, ASTReader::PerFileData &F, 3357 const ASTReader::RecordData &Record, unsigned &Idx) 3358 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3359 { } 3360 3361 // We want compile-time assurance that we've enumerated all of 3362 // these, so unfortunately we have to declare them first, then 3363 // define them out-of-line. 3364#define ABSTRACT_TYPELOC(CLASS, PARENT) 3365#define TYPELOC(CLASS, PARENT) \ 3366 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3367#include "clang/AST/TypeLocNodes.def" 3368 3369 void VisitFunctionTypeLoc(FunctionTypeLoc); 3370 void VisitArrayTypeLoc(ArrayTypeLoc); 3371}; 3372 3373void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3374 // nothing to do 3375} 3376void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3377 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3378 if (TL.needsExtraLocalData()) { 3379 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3380 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3381 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3382 TL.setModeAttr(Record[Idx++]); 3383 } 3384} 3385void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3386 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3387} 3388void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3389 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3390} 3391void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3392 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3393} 3394void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3395 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3396} 3397void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3398 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3399} 3400void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3401 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3402} 3403void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3404 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3405 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3406 if (Record[Idx++]) 3407 TL.setSizeExpr(Reader.ReadExpr(F)); 3408 else 3409 TL.setSizeExpr(0); 3410} 3411void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3412 VisitArrayTypeLoc(TL); 3413} 3414void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3415 VisitArrayTypeLoc(TL); 3416} 3417void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3418 VisitArrayTypeLoc(TL); 3419} 3420void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3421 DependentSizedArrayTypeLoc TL) { 3422 VisitArrayTypeLoc(TL); 3423} 3424void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3425 DependentSizedExtVectorTypeLoc TL) { 3426 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3427} 3428void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3429 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3430} 3431void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3432 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3433} 3434void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3435 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3436 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3437 TL.setTrailingReturn(Record[Idx++]); 3438 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3439 TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++]))); 3440 } 3441} 3442void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3443 VisitFunctionTypeLoc(TL); 3444} 3445void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3446 VisitFunctionTypeLoc(TL); 3447} 3448void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3449 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3450} 3451void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3452 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3453} 3454void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3455 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3456 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3457 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3458} 3459void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3460 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3461 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3462 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3463 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3464} 3465void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3466 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3467} 3468void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3469 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3470} 3471void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3472 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3473} 3474void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3475 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3476} 3477void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3478 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3479 if (TL.hasAttrOperand()) { 3480 SourceRange range; 3481 range.setBegin(ReadSourceLocation(Record, Idx)); 3482 range.setEnd(ReadSourceLocation(Record, Idx)); 3483 TL.setAttrOperandParensRange(range); 3484 } 3485 if (TL.hasAttrExprOperand()) { 3486 if (Record[Idx++]) 3487 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3488 else 3489 TL.setAttrExprOperand(0); 3490 } else if (TL.hasAttrEnumOperand()) 3491 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3492} 3493void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3494 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3495} 3496void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3497 SubstTemplateTypeParmTypeLoc TL) { 3498 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3499} 3500void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3501 SubstTemplateTypeParmPackTypeLoc TL) { 3502 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3503} 3504void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3505 TemplateSpecializationTypeLoc TL) { 3506 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3507 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3508 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3509 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3510 TL.setArgLocInfo(i, 3511 Reader.GetTemplateArgumentLocInfo(F, 3512 TL.getTypePtr()->getArg(i).getKind(), 3513 Record, Idx)); 3514} 3515void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3516 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3517 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3518} 3519void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3520 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3521 TL.setQualifierRange(Reader.ReadSourceRange(F, Record, Idx)); 3522} 3523void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3524 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3525} 3526void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3527 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3528 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3529 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3530} 3531void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3532 DependentTemplateSpecializationTypeLoc TL) { 3533 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3534 TL.setQualifierRange(Reader.ReadSourceRange(F, Record, Idx)); 3535 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3536 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3537 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3538 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3539 TL.setArgLocInfo(I, 3540 Reader.GetTemplateArgumentLocInfo(F, 3541 TL.getTypePtr()->getArg(I).getKind(), 3542 Record, Idx)); 3543} 3544void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3545 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3546} 3547void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3548 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3549} 3550void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3551 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3552 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3553 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3554 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3555 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3556} 3557void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3558 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3559} 3560 3561TypeSourceInfo *ASTReader::GetTypeSourceInfo(PerFileData &F, 3562 const RecordData &Record, 3563 unsigned &Idx) { 3564 QualType InfoTy = GetType(Record[Idx++]); 3565 if (InfoTy.isNull()) 3566 return 0; 3567 3568 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3569 TypeLocReader TLR(*this, F, Record, Idx); 3570 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3571 TLR.Visit(TL); 3572 return TInfo; 3573} 3574 3575QualType ASTReader::GetType(TypeID ID) { 3576 unsigned FastQuals = ID & Qualifiers::FastMask; 3577 unsigned Index = ID >> Qualifiers::FastWidth; 3578 3579 if (Index < NUM_PREDEF_TYPE_IDS) { 3580 QualType T; 3581 switch ((PredefinedTypeIDs)Index) { 3582 case PREDEF_TYPE_NULL_ID: return QualType(); 3583 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3584 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3585 3586 case PREDEF_TYPE_CHAR_U_ID: 3587 case PREDEF_TYPE_CHAR_S_ID: 3588 // FIXME: Check that the signedness of CharTy is correct! 3589 T = Context->CharTy; 3590 break; 3591 3592 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3593 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3594 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3595 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3596 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 3597 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 3598 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 3599 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 3600 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 3601 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 3602 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 3603 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 3604 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 3605 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 3606 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 3607 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 3608 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 3609 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 3610 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 3611 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 3612 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 3613 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 3614 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 3615 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 3616 } 3617 3618 assert(!T.isNull() && "Unknown predefined type"); 3619 return T.withFastQualifiers(FastQuals); 3620 } 3621 3622 Index -= NUM_PREDEF_TYPE_IDS; 3623 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 3624 if (TypesLoaded[Index].isNull()) { 3625 TypesLoaded[Index] = ReadTypeRecord(Index); 3626 if (TypesLoaded[Index].isNull()) 3627 return QualType(); 3628 3629 TypesLoaded[Index]->setFromAST(); 3630 TypeIdxs[TypesLoaded[Index]] = TypeIdx::fromTypeID(ID); 3631 if (DeserializationListener) 3632 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 3633 TypesLoaded[Index]); 3634 } 3635 3636 return TypesLoaded[Index].withFastQualifiers(FastQuals); 3637} 3638 3639TypeID ASTReader::GetTypeID(QualType T) const { 3640 return MakeTypeID(T, 3641 std::bind1st(std::mem_fun(&ASTReader::GetTypeIdx), this)); 3642} 3643 3644TypeIdx ASTReader::GetTypeIdx(QualType T) const { 3645 if (T.isNull()) 3646 return TypeIdx(); 3647 assert(!T.getLocalFastQualifiers()); 3648 3649 TypeIdxMap::const_iterator I = TypeIdxs.find(T); 3650 // GetTypeIdx is mostly used for computing the hash of DeclarationNames and 3651 // comparing keys of ASTDeclContextNameLookupTable. 3652 // If the type didn't come from the AST file use a specially marked index 3653 // so that any hash/key comparison fail since no such index is stored 3654 // in a AST file. 3655 if (I == TypeIdxs.end()) 3656 return TypeIdx(-1); 3657 return I->second; 3658} 3659 3660unsigned ASTReader::getTotalNumCXXBaseSpecifiers() const { 3661 unsigned Result = 0; 3662 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 3663 Result += Chain[I]->LocalNumCXXBaseSpecifiers; 3664 3665 return Result; 3666} 3667 3668TemplateArgumentLocInfo 3669ASTReader::GetTemplateArgumentLocInfo(PerFileData &F, 3670 TemplateArgument::ArgKind Kind, 3671 const RecordData &Record, 3672 unsigned &Index) { 3673 switch (Kind) { 3674 case TemplateArgument::Expression: 3675 return ReadExpr(F); 3676 case TemplateArgument::Type: 3677 return GetTypeSourceInfo(F, Record, Index); 3678 case TemplateArgument::Template: { 3679 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3680 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3681 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3682 SourceLocation()); 3683 } 3684 case TemplateArgument::TemplateExpansion: { 3685 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3686 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3687 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 3688 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3689 EllipsisLoc); 3690 } 3691 case TemplateArgument::Null: 3692 case TemplateArgument::Integral: 3693 case TemplateArgument::Declaration: 3694 case TemplateArgument::Pack: 3695 return TemplateArgumentLocInfo(); 3696 } 3697 llvm_unreachable("unexpected template argument loc"); 3698 return TemplateArgumentLocInfo(); 3699} 3700 3701TemplateArgumentLoc 3702ASTReader::ReadTemplateArgumentLoc(PerFileData &F, 3703 const RecordData &Record, unsigned &Index) { 3704 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 3705 3706 if (Arg.getKind() == TemplateArgument::Expression) { 3707 if (Record[Index++]) // bool InfoHasSameExpr. 3708 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 3709 } 3710 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 3711 Record, Index)); 3712} 3713 3714Decl *ASTReader::GetExternalDecl(uint32_t ID) { 3715 return GetDecl(ID); 3716} 3717 3718uint64_t 3719ASTReader::GetCXXBaseSpecifiersOffset(serialization::CXXBaseSpecifiersID ID) { 3720 if (ID == 0) 3721 return 0; 3722 3723 --ID; 3724 uint64_t Offset = 0; 3725 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3726 if (ID < Chain[I]->LocalNumCXXBaseSpecifiers) 3727 return Offset + Chain[I]->CXXBaseSpecifiersOffsets[ID]; 3728 3729 ID -= Chain[I]->LocalNumCXXBaseSpecifiers; 3730 Offset += Chain[I]->SizeInBits; 3731 } 3732 3733 assert(false && "CXXBaseSpecifiers not found"); 3734 return 0; 3735} 3736 3737CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 3738 // Figure out which AST file contains this offset. 3739 PerFileData *F = 0; 3740 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3741 if (Offset < Chain[I]->SizeInBits) { 3742 F = Chain[I]; 3743 break; 3744 } 3745 3746 Offset -= Chain[I]->SizeInBits; 3747 } 3748 3749 if (!F) { 3750 Error("Malformed AST file: C++ base specifiers at impossible offset"); 3751 return 0; 3752 } 3753 3754 llvm::BitstreamCursor &Cursor = F->DeclsCursor; 3755 SavedStreamPosition SavedPosition(Cursor); 3756 Cursor.JumpToBit(Offset); 3757 ReadingKindTracker ReadingKind(Read_Decl, *this); 3758 RecordData Record; 3759 unsigned Code = Cursor.ReadCode(); 3760 unsigned RecCode = Cursor.ReadRecord(Code, Record); 3761 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 3762 Error("Malformed AST file: missing C++ base specifiers"); 3763 return 0; 3764 } 3765 3766 unsigned Idx = 0; 3767 unsigned NumBases = Record[Idx++]; 3768 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 3769 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 3770 for (unsigned I = 0; I != NumBases; ++I) 3771 Bases[I] = ReadCXXBaseSpecifier(*F, Record, Idx); 3772 return Bases; 3773} 3774 3775TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 3776 if (!DeclsLoaded[0]) { 3777 ReadDeclRecord(0, 1); 3778 if (DeserializationListener) 3779 DeserializationListener->DeclRead(1, DeclsLoaded[0]); 3780 } 3781 3782 return cast<TranslationUnitDecl>(DeclsLoaded[0]); 3783} 3784 3785Decl *ASTReader::GetDecl(DeclID ID) { 3786 if (ID == 0) 3787 return 0; 3788 3789 if (ID > DeclsLoaded.size()) { 3790 Error("declaration ID out-of-range for AST file"); 3791 return 0; 3792 } 3793 3794 unsigned Index = ID - 1; 3795 if (!DeclsLoaded[Index]) { 3796 ReadDeclRecord(Index, ID); 3797 if (DeserializationListener) 3798 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 3799 } 3800 3801 return DeclsLoaded[Index]; 3802} 3803 3804/// \brief Resolve the offset of a statement into a statement. 3805/// 3806/// This operation will read a new statement from the external 3807/// source each time it is called, and is meant to be used via a 3808/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 3809Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 3810 // Switch case IDs are per Decl. 3811 ClearSwitchCaseIDs(); 3812 3813 // Offset here is a global offset across the entire chain. 3814 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3815 PerFileData &F = *Chain[N - I - 1]; 3816 if (Offset < F.SizeInBits) { 3817 // Since we know that this statement is part of a decl, make sure to use 3818 // the decl cursor to read it. 3819 F.DeclsCursor.JumpToBit(Offset); 3820 return ReadStmtFromStream(F); 3821 } 3822 Offset -= F.SizeInBits; 3823 } 3824 llvm_unreachable("Broken chain"); 3825} 3826 3827bool ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 3828 bool (*isKindWeWant)(Decl::Kind), 3829 llvm::SmallVectorImpl<Decl*> &Decls) { 3830 assert(DC->hasExternalLexicalStorage() && 3831 "DeclContext has no lexical decls in storage"); 3832 3833 // There might be lexical decls in multiple parts of the chain, for the TU 3834 // at least. 3835 // DeclContextOffsets might reallocate as we load additional decls below, 3836 // so make a copy of the vector. 3837 DeclContextInfos Infos = DeclContextOffsets[DC]; 3838 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3839 I != E; ++I) { 3840 // IDs can be 0 if this context doesn't contain declarations. 3841 if (!I->LexicalDecls) 3842 continue; 3843 3844 // Load all of the declaration IDs 3845 for (const KindDeclIDPair *ID = I->LexicalDecls, 3846 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 3847 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 3848 continue; 3849 3850 Decl *D = GetDecl(ID->second); 3851 assert(D && "Null decl in lexical decls"); 3852 Decls.push_back(D); 3853 } 3854 } 3855 3856 ++NumLexicalDeclContextsRead; 3857 return false; 3858} 3859 3860DeclContext::lookup_result 3861ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 3862 DeclarationName Name) { 3863 assert(DC->hasExternalVisibleStorage() && 3864 "DeclContext has no visible decls in storage"); 3865 if (!Name) 3866 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 3867 DeclContext::lookup_iterator(0)); 3868 3869 llvm::SmallVector<NamedDecl *, 64> Decls; 3870 // There might be visible decls in multiple parts of the chain, for the TU 3871 // and namespaces. For any given name, the last available results replace 3872 // all earlier ones. For this reason, we walk in reverse. 3873 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3874 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 3875 I != E; ++I) { 3876 if (!I->NameLookupTableData) 3877 continue; 3878 3879 ASTDeclContextNameLookupTable *LookupTable = 3880 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3881 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 3882 if (Pos == LookupTable->end()) 3883 continue; 3884 3885 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 3886 for (; Data.first != Data.second; ++Data.first) 3887 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3888 break; 3889 } 3890 3891 ++NumVisibleDeclContextsRead; 3892 3893 SetExternalVisibleDeclsForName(DC, Name, Decls); 3894 return const_cast<DeclContext*>(DC)->lookup(Name); 3895} 3896 3897void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 3898 assert(DC->hasExternalVisibleStorage() && 3899 "DeclContext has no visible decls in storage"); 3900 3901 llvm::SmallVector<NamedDecl *, 64> Decls; 3902 // There might be visible decls in multiple parts of the chain, for the TU 3903 // and namespaces. 3904 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3905 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3906 I != E; ++I) { 3907 if (!I->NameLookupTableData) 3908 continue; 3909 3910 ASTDeclContextNameLookupTable *LookupTable = 3911 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3912 for (ASTDeclContextNameLookupTable::item_iterator 3913 ItemI = LookupTable->item_begin(), 3914 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 3915 ASTDeclContextNameLookupTable::item_iterator::value_type Val 3916 = *ItemI; 3917 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 3918 Decls.clear(); 3919 for (; Data.first != Data.second; ++Data.first) 3920 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3921 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 3922 } 3923 } 3924} 3925 3926void ASTReader::PassInterestingDeclsToConsumer() { 3927 assert(Consumer); 3928 while (!InterestingDecls.empty()) { 3929 DeclGroupRef DG(InterestingDecls.front()); 3930 InterestingDecls.pop_front(); 3931 Consumer->HandleInterestingDecl(DG); 3932 } 3933} 3934 3935void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 3936 this->Consumer = Consumer; 3937 3938 if (!Consumer) 3939 return; 3940 3941 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 3942 // Force deserialization of this decl, which will cause it to be queued for 3943 // passing to the consumer. 3944 GetDecl(ExternalDefinitions[I]); 3945 } 3946 3947 PassInterestingDeclsToConsumer(); 3948} 3949 3950void ASTReader::PrintStats() { 3951 std::fprintf(stderr, "*** AST File Statistics:\n"); 3952 3953 unsigned NumTypesLoaded 3954 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 3955 QualType()); 3956 unsigned NumDeclsLoaded 3957 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 3958 (Decl *)0); 3959 unsigned NumIdentifiersLoaded 3960 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 3961 IdentifiersLoaded.end(), 3962 (IdentifierInfo *)0); 3963 unsigned NumSelectorsLoaded 3964 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 3965 SelectorsLoaded.end(), 3966 Selector()); 3967 3968 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 3969 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 3970 if (TotalNumSLocEntries) 3971 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 3972 NumSLocEntriesRead, TotalNumSLocEntries, 3973 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 3974 if (!TypesLoaded.empty()) 3975 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 3976 NumTypesLoaded, (unsigned)TypesLoaded.size(), 3977 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 3978 if (!DeclsLoaded.empty()) 3979 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 3980 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 3981 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 3982 if (!IdentifiersLoaded.empty()) 3983 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 3984 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 3985 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 3986 if (!SelectorsLoaded.empty()) 3987 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 3988 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 3989 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 3990 if (TotalNumStatements) 3991 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 3992 NumStatementsRead, TotalNumStatements, 3993 ((float)NumStatementsRead/TotalNumStatements * 100)); 3994 if (TotalNumMacros) 3995 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 3996 NumMacrosRead, TotalNumMacros, 3997 ((float)NumMacrosRead/TotalNumMacros * 100)); 3998 if (TotalLexicalDeclContexts) 3999 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4000 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4001 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4002 * 100)); 4003 if (TotalVisibleDeclContexts) 4004 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4005 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4006 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4007 * 100)); 4008 if (TotalNumMethodPoolEntries) { 4009 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4010 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4011 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4012 * 100)); 4013 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4014 } 4015 std::fprintf(stderr, "\n"); 4016} 4017 4018void ASTReader::InitializeSema(Sema &S) { 4019 SemaObj = &S; 4020 S.ExternalSource = this; 4021 4022 // Makes sure any declarations that were deserialized "too early" 4023 // still get added to the identifier's declaration chains. 4024 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4025 if (SemaObj->TUScope) 4026 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4027 4028 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4029 } 4030 PreloadedDecls.clear(); 4031 4032 // If there were any tentative definitions, deserialize them and add 4033 // them to Sema's list of tentative definitions. 4034 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4035 VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I])); 4036 SemaObj->TentativeDefinitions.push_back(Var); 4037 } 4038 4039 // If there were any unused file scoped decls, deserialize them and add to 4040 // Sema's list of unused file scoped decls. 4041 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4042 DeclaratorDecl *D = cast<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4043 SemaObj->UnusedFileScopedDecls.push_back(D); 4044 } 4045 4046 // If there were any locally-scoped external declarations, 4047 // deserialize them and add them to Sema's table of locally-scoped 4048 // external declarations. 4049 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4050 NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4051 SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D; 4052 } 4053 4054 // If there were any ext_vector type declarations, deserialize them 4055 // and add them to Sema's vector of such declarations. 4056 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) 4057 SemaObj->ExtVectorDecls.push_back( 4058 cast<TypedefDecl>(GetDecl(ExtVectorDecls[I]))); 4059 4060 // FIXME: Do VTable uses and dynamic classes deserialize too much ? 4061 // Can we cut them down before writing them ? 4062 4063 // If there were any dynamic classes declarations, deserialize them 4064 // and add them to Sema's vector of such declarations. 4065 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) 4066 SemaObj->DynamicClasses.push_back( 4067 cast<CXXRecordDecl>(GetDecl(DynamicClasses[I]))); 4068 4069 // Load the offsets of the declarations that Sema references. 4070 // They will be lazily deserialized when needed. 4071 if (!SemaDeclRefs.empty()) { 4072 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4073 SemaObj->StdNamespace = SemaDeclRefs[0]; 4074 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4075 } 4076 4077 for (PerFileData *F = FirstInSource; F; F = F->NextInSource) { 4078 4079 // If there are @selector references added them to its pool. This is for 4080 // implementation of -Wselector. 4081 if (!F->ReferencedSelectorsData.empty()) { 4082 unsigned int DataSize = F->ReferencedSelectorsData.size()-1; 4083 unsigned I = 0; 4084 while (I < DataSize) { 4085 Selector Sel = DecodeSelector(F->ReferencedSelectorsData[I++]); 4086 SourceLocation SelLoc = ReadSourceLocation( 4087 *F, F->ReferencedSelectorsData, I); 4088 SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc)); 4089 } 4090 } 4091 4092 // If there were any pending implicit instantiations, deserialize them 4093 // and add them to Sema's queue of such instantiations. 4094 assert(F->PendingInstantiations.size() % 2 == 0 && 4095 "Expected pairs of entries"); 4096 for (unsigned Idx = 0, N = F->PendingInstantiations.size(); Idx < N;) { 4097 ValueDecl *D=cast<ValueDecl>(GetDecl(F->PendingInstantiations[Idx++])); 4098 SourceLocation Loc = ReadSourceLocation(*F, F->PendingInstantiations,Idx); 4099 SemaObj->PendingInstantiations.push_back(std::make_pair(D, Loc)); 4100 } 4101 } 4102 4103 // The two special data sets below always come from the most recent PCH, 4104 // which is at the front of the chain. 4105 PerFileData &F = *Chain.front(); 4106 4107 // If there were any weak undeclared identifiers, deserialize them and add to 4108 // Sema's list of weak undeclared identifiers. 4109 if (!WeakUndeclaredIdentifiers.empty()) { 4110 unsigned Idx = 0; 4111 for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) { 4112 IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4113 IdentifierInfo *AliasId= GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4114 SourceLocation Loc = ReadSourceLocation(F, WeakUndeclaredIdentifiers,Idx); 4115 bool Used = WeakUndeclaredIdentifiers[Idx++]; 4116 Sema::WeakInfo WI(AliasId, Loc); 4117 WI.setUsed(Used); 4118 SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI)); 4119 } 4120 } 4121 4122 // If there were any VTable uses, deserialize the information and add it 4123 // to Sema's vector and map of VTable uses. 4124 if (!VTableUses.empty()) { 4125 unsigned Idx = 0; 4126 for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) { 4127 CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4128 SourceLocation Loc = ReadSourceLocation(F, VTableUses, Idx); 4129 bool DefinitionRequired = VTableUses[Idx++]; 4130 SemaObj->VTableUses.push_back(std::make_pair(Class, Loc)); 4131 SemaObj->VTablesUsed[Class] = DefinitionRequired; 4132 } 4133 } 4134 4135 if (!FPPragmaOptions.empty()) { 4136 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4137 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4138 } 4139 4140 if (!OpenCLExtensions.empty()) { 4141 unsigned I = 0; 4142#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4143#include "clang/Basic/OpenCLExtensions.def" 4144 4145 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4146 } 4147} 4148 4149IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4150 // Try to find this name within our on-disk hash tables. We start with the 4151 // most recent one, since that one contains the most up-to-date info. 4152 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4153 ASTIdentifierLookupTable *IdTable 4154 = (ASTIdentifierLookupTable *)Chain[I]->IdentifierLookupTable; 4155 if (!IdTable) 4156 continue; 4157 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4158 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4159 if (Pos == IdTable->end()) 4160 continue; 4161 4162 // Dereferencing the iterator has the effect of building the 4163 // IdentifierInfo node and populating it with the various 4164 // declarations it needs. 4165 return *Pos; 4166 } 4167 return 0; 4168} 4169 4170namespace clang { 4171 /// \brief An identifier-lookup iterator that enumerates all of the 4172 /// identifiers stored within a set of AST files. 4173 class ASTIdentifierIterator : public IdentifierIterator { 4174 /// \brief The AST reader whose identifiers are being enumerated. 4175 const ASTReader &Reader; 4176 4177 /// \brief The current index into the chain of AST files stored in 4178 /// the AST reader. 4179 unsigned Index; 4180 4181 /// \brief The current position within the identifier lookup table 4182 /// of the current AST file. 4183 ASTIdentifierLookupTable::key_iterator Current; 4184 4185 /// \brief The end position within the identifier lookup table of 4186 /// the current AST file. 4187 ASTIdentifierLookupTable::key_iterator End; 4188 4189 public: 4190 explicit ASTIdentifierIterator(const ASTReader &Reader); 4191 4192 virtual llvm::StringRef Next(); 4193 }; 4194} 4195 4196ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4197 : Reader(Reader), Index(Reader.Chain.size() - 1) { 4198 ASTIdentifierLookupTable *IdTable 4199 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4200 Current = IdTable->key_begin(); 4201 End = IdTable->key_end(); 4202} 4203 4204llvm::StringRef ASTIdentifierIterator::Next() { 4205 while (Current == End) { 4206 // If we have exhausted all of our AST files, we're done. 4207 if (Index == 0) 4208 return llvm::StringRef(); 4209 4210 --Index; 4211 ASTIdentifierLookupTable *IdTable 4212 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4213 Current = IdTable->key_begin(); 4214 End = IdTable->key_end(); 4215 } 4216 4217 // We have any identifiers remaining in the current AST file; return 4218 // the next one. 4219 std::pair<const char*, unsigned> Key = *Current; 4220 ++Current; 4221 return llvm::StringRef(Key.first, Key.second); 4222} 4223 4224IdentifierIterator *ASTReader::getIdentifiers() const { 4225 return new ASTIdentifierIterator(*this); 4226} 4227 4228std::pair<ObjCMethodList, ObjCMethodList> 4229ASTReader::ReadMethodPool(Selector Sel) { 4230 // Find this selector in a hash table. We want to find the most recent entry. 4231 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4232 PerFileData &F = *Chain[I]; 4233 if (!F.SelectorLookupTable) 4234 continue; 4235 4236 ASTSelectorLookupTable *PoolTable 4237 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4238 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4239 if (Pos != PoolTable->end()) { 4240 ++NumSelectorsRead; 4241 // FIXME: Not quite happy with the statistics here. We probably should 4242 // disable this tracking when called via LoadSelector. 4243 // Also, should entries without methods count as misses? 4244 ++NumMethodPoolEntriesRead; 4245 ASTSelectorLookupTrait::data_type Data = *Pos; 4246 if (DeserializationListener) 4247 DeserializationListener->SelectorRead(Data.ID, Sel); 4248 return std::make_pair(Data.Instance, Data.Factory); 4249 } 4250 } 4251 4252 ++NumMethodPoolMisses; 4253 return std::pair<ObjCMethodList, ObjCMethodList>(); 4254} 4255 4256void ASTReader::LoadSelector(Selector Sel) { 4257 // It would be complicated to avoid reading the methods anyway. So don't. 4258 ReadMethodPool(Sel); 4259} 4260 4261void ASTReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) { 4262 assert(ID && "Non-zero identifier ID required"); 4263 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4264 IdentifiersLoaded[ID - 1] = II; 4265 if (DeserializationListener) 4266 DeserializationListener->IdentifierRead(ID, II); 4267} 4268 4269/// \brief Set the globally-visible declarations associated with the given 4270/// identifier. 4271/// 4272/// If the AST reader is currently in a state where the given declaration IDs 4273/// cannot safely be resolved, they are queued until it is safe to resolve 4274/// them. 4275/// 4276/// \param II an IdentifierInfo that refers to one or more globally-visible 4277/// declarations. 4278/// 4279/// \param DeclIDs the set of declaration IDs with the name @p II that are 4280/// visible at global scope. 4281/// 4282/// \param Nonrecursive should be true to indicate that the caller knows that 4283/// this call is non-recursive, and therefore the globally-visible declarations 4284/// will not be placed onto the pending queue. 4285void 4286ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4287 const llvm::SmallVectorImpl<uint32_t> &DeclIDs, 4288 bool Nonrecursive) { 4289 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4290 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4291 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4292 PII.II = II; 4293 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4294 return; 4295 } 4296 4297 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4298 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4299 if (SemaObj) { 4300 if (SemaObj->TUScope) { 4301 // Introduce this declaration into the translation-unit scope 4302 // and add it to the declaration chain for this identifier, so 4303 // that (unqualified) name lookup will find it. 4304 SemaObj->TUScope->AddDecl(D); 4305 } 4306 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4307 } else { 4308 // Queue this declaration so that it will be added to the 4309 // translation unit scope and identifier's declaration chain 4310 // once a Sema object is known. 4311 PreloadedDecls.push_back(D); 4312 } 4313 } 4314} 4315 4316IdentifierInfo *ASTReader::DecodeIdentifierInfo(unsigned ID) { 4317 if (ID == 0) 4318 return 0; 4319 4320 if (IdentifiersLoaded.empty()) { 4321 Error("no identifier table in AST file"); 4322 return 0; 4323 } 4324 4325 assert(PP && "Forgot to set Preprocessor ?"); 4326 ID -= 1; 4327 if (!IdentifiersLoaded[ID]) { 4328 unsigned Index = ID; 4329 const char *Str = 0; 4330 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4331 PerFileData *F = Chain[N - I - 1]; 4332 if (Index < F->LocalNumIdentifiers) { 4333 uint32_t Offset = F->IdentifierOffsets[Index]; 4334 Str = F->IdentifierTableData + Offset; 4335 break; 4336 } 4337 Index -= F->LocalNumIdentifiers; 4338 } 4339 assert(Str && "Broken Chain"); 4340 4341 // All of the strings in the AST file are preceded by a 16-bit length. 4342 // Extract that 16-bit length to avoid having to execute strlen(). 4343 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4344 // unsigned integers. This is important to avoid integer overflow when 4345 // we cast them to 'unsigned'. 4346 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4347 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4348 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4349 IdentifiersLoaded[ID] 4350 = &PP->getIdentifierTable().get(Str, StrLen); 4351 if (DeserializationListener) 4352 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4353 } 4354 4355 return IdentifiersLoaded[ID]; 4356} 4357 4358void ASTReader::ReadSLocEntry(unsigned ID) { 4359 ReadSLocEntryRecord(ID); 4360} 4361 4362Selector ASTReader::DecodeSelector(unsigned ID) { 4363 if (ID == 0) 4364 return Selector(); 4365 4366 if (ID > SelectorsLoaded.size()) { 4367 Error("selector ID out of range in AST file"); 4368 return Selector(); 4369 } 4370 4371 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4372 // Load this selector from the selector table. 4373 unsigned Idx = ID - 1; 4374 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4375 PerFileData &F = *Chain[N - I - 1]; 4376 if (Idx < F.LocalNumSelectors) { 4377 ASTSelectorLookupTrait Trait(*this); 4378 SelectorsLoaded[ID - 1] = 4379 Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0); 4380 if (DeserializationListener) 4381 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4382 break; 4383 } 4384 Idx -= F.LocalNumSelectors; 4385 } 4386 } 4387 4388 return SelectorsLoaded[ID - 1]; 4389} 4390 4391Selector ASTReader::GetExternalSelector(uint32_t ID) { 4392 return DecodeSelector(ID); 4393} 4394 4395uint32_t ASTReader::GetNumExternalSelectors() { 4396 // ID 0 (the null selector) is considered an external selector. 4397 return getTotalNumSelectors() + 1; 4398} 4399 4400DeclarationName 4401ASTReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) { 4402 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4403 switch (Kind) { 4404 case DeclarationName::Identifier: 4405 return DeclarationName(GetIdentifierInfo(Record, Idx)); 4406 4407 case DeclarationName::ObjCZeroArgSelector: 4408 case DeclarationName::ObjCOneArgSelector: 4409 case DeclarationName::ObjCMultiArgSelector: 4410 return DeclarationName(GetSelector(Record, Idx)); 4411 4412 case DeclarationName::CXXConstructorName: 4413 return Context->DeclarationNames.getCXXConstructorName( 4414 Context->getCanonicalType(GetType(Record[Idx++]))); 4415 4416 case DeclarationName::CXXDestructorName: 4417 return Context->DeclarationNames.getCXXDestructorName( 4418 Context->getCanonicalType(GetType(Record[Idx++]))); 4419 4420 case DeclarationName::CXXConversionFunctionName: 4421 return Context->DeclarationNames.getCXXConversionFunctionName( 4422 Context->getCanonicalType(GetType(Record[Idx++]))); 4423 4424 case DeclarationName::CXXOperatorName: 4425 return Context->DeclarationNames.getCXXOperatorName( 4426 (OverloadedOperatorKind)Record[Idx++]); 4427 4428 case DeclarationName::CXXLiteralOperatorName: 4429 return Context->DeclarationNames.getCXXLiteralOperatorName( 4430 GetIdentifierInfo(Record, Idx)); 4431 4432 case DeclarationName::CXXUsingDirective: 4433 return DeclarationName::getUsingDirectiveName(); 4434 } 4435 4436 // Required to silence GCC warning 4437 return DeclarationName(); 4438} 4439 4440void ASTReader::ReadDeclarationNameLoc(PerFileData &F, 4441 DeclarationNameLoc &DNLoc, 4442 DeclarationName Name, 4443 const RecordData &Record, unsigned &Idx) { 4444 switch (Name.getNameKind()) { 4445 case DeclarationName::CXXConstructorName: 4446 case DeclarationName::CXXDestructorName: 4447 case DeclarationName::CXXConversionFunctionName: 4448 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4449 break; 4450 4451 case DeclarationName::CXXOperatorName: 4452 DNLoc.CXXOperatorName.BeginOpNameLoc 4453 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4454 DNLoc.CXXOperatorName.EndOpNameLoc 4455 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4456 break; 4457 4458 case DeclarationName::CXXLiteralOperatorName: 4459 DNLoc.CXXLiteralOperatorName.OpNameLoc 4460 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4461 break; 4462 4463 case DeclarationName::Identifier: 4464 case DeclarationName::ObjCZeroArgSelector: 4465 case DeclarationName::ObjCOneArgSelector: 4466 case DeclarationName::ObjCMultiArgSelector: 4467 case DeclarationName::CXXUsingDirective: 4468 break; 4469 } 4470} 4471 4472void ASTReader::ReadDeclarationNameInfo(PerFileData &F, 4473 DeclarationNameInfo &NameInfo, 4474 const RecordData &Record, unsigned &Idx) { 4475 NameInfo.setName(ReadDeclarationName(Record, Idx)); 4476 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4477 DeclarationNameLoc DNLoc; 4478 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4479 NameInfo.setInfo(DNLoc); 4480} 4481 4482void ASTReader::ReadQualifierInfo(PerFileData &F, QualifierInfo &Info, 4483 const RecordData &Record, unsigned &Idx) { 4484 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4485 unsigned NumTPLists = Record[Idx++]; 4486 Info.NumTemplParamLists = NumTPLists; 4487 if (NumTPLists) { 4488 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 4489 for (unsigned i=0; i != NumTPLists; ++i) 4490 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4491 } 4492} 4493 4494TemplateName 4495ASTReader::ReadTemplateName(PerFileData &F, const RecordData &Record, 4496 unsigned &Idx) { 4497 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 4498 switch (Kind) { 4499 case TemplateName::Template: 4500 return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++]))); 4501 4502 case TemplateName::OverloadedTemplate: { 4503 unsigned size = Record[Idx++]; 4504 UnresolvedSet<8> Decls; 4505 while (size--) 4506 Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4507 4508 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 4509 } 4510 4511 case TemplateName::QualifiedTemplate: { 4512 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4513 bool hasTemplKeyword = Record[Idx++]; 4514 TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++])); 4515 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 4516 } 4517 4518 case TemplateName::DependentTemplate: { 4519 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4520 if (Record[Idx++]) // isIdentifier 4521 return Context->getDependentTemplateName(NNS, 4522 GetIdentifierInfo(Record, Idx)); 4523 return Context->getDependentTemplateName(NNS, 4524 (OverloadedOperatorKind)Record[Idx++]); 4525 } 4526 4527 case TemplateName::SubstTemplateTemplateParmPack: { 4528 TemplateTemplateParmDecl *Param 4529 = cast_or_null<TemplateTemplateParmDecl>(GetDecl(Record[Idx++])); 4530 if (!Param) 4531 return TemplateName(); 4532 4533 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 4534 if (ArgPack.getKind() != TemplateArgument::Pack) 4535 return TemplateName(); 4536 4537 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 4538 } 4539 } 4540 4541 assert(0 && "Unhandled template name kind!"); 4542 return TemplateName(); 4543} 4544 4545TemplateArgument 4546ASTReader::ReadTemplateArgument(PerFileData &F, 4547 const RecordData &Record, unsigned &Idx) { 4548 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 4549 switch (Kind) { 4550 case TemplateArgument::Null: 4551 return TemplateArgument(); 4552 case TemplateArgument::Type: 4553 return TemplateArgument(GetType(Record[Idx++])); 4554 case TemplateArgument::Declaration: 4555 return TemplateArgument(GetDecl(Record[Idx++])); 4556 case TemplateArgument::Integral: { 4557 llvm::APSInt Value = ReadAPSInt(Record, Idx); 4558 QualType T = GetType(Record[Idx++]); 4559 return TemplateArgument(Value, T); 4560 } 4561 case TemplateArgument::Template: 4562 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 4563 case TemplateArgument::TemplateExpansion: { 4564 TemplateName Name = ReadTemplateName(F, Record, Idx); 4565 llvm::Optional<unsigned> NumTemplateExpansions; 4566 if (unsigned NumExpansions = Record[Idx++]) 4567 NumTemplateExpansions = NumExpansions - 1; 4568 return TemplateArgument(Name, NumTemplateExpansions); 4569 } 4570 case TemplateArgument::Expression: 4571 return TemplateArgument(ReadExpr(F)); 4572 case TemplateArgument::Pack: { 4573 unsigned NumArgs = Record[Idx++]; 4574 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 4575 for (unsigned I = 0; I != NumArgs; ++I) 4576 Args[I] = ReadTemplateArgument(F, Record, Idx); 4577 return TemplateArgument(Args, NumArgs); 4578 } 4579 } 4580 4581 assert(0 && "Unhandled template argument kind!"); 4582 return TemplateArgument(); 4583} 4584 4585TemplateParameterList * 4586ASTReader::ReadTemplateParameterList(PerFileData &F, 4587 const RecordData &Record, unsigned &Idx) { 4588 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 4589 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 4590 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 4591 4592 unsigned NumParams = Record[Idx++]; 4593 llvm::SmallVector<NamedDecl *, 16> Params; 4594 Params.reserve(NumParams); 4595 while (NumParams--) 4596 Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4597 4598 TemplateParameterList* TemplateParams = 4599 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 4600 Params.data(), Params.size(), RAngleLoc); 4601 return TemplateParams; 4602} 4603 4604void 4605ASTReader:: 4606ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, 4607 PerFileData &F, const RecordData &Record, 4608 unsigned &Idx) { 4609 unsigned NumTemplateArgs = Record[Idx++]; 4610 TemplArgs.reserve(NumTemplateArgs); 4611 while (NumTemplateArgs--) 4612 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 4613} 4614 4615/// \brief Read a UnresolvedSet structure. 4616void ASTReader::ReadUnresolvedSet(UnresolvedSetImpl &Set, 4617 const RecordData &Record, unsigned &Idx) { 4618 unsigned NumDecls = Record[Idx++]; 4619 while (NumDecls--) { 4620 NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++])); 4621 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 4622 Set.addDecl(D, AS); 4623 } 4624} 4625 4626CXXBaseSpecifier 4627ASTReader::ReadCXXBaseSpecifier(PerFileData &F, 4628 const RecordData &Record, unsigned &Idx) { 4629 bool isVirtual = static_cast<bool>(Record[Idx++]); 4630 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 4631 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 4632 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 4633 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 4634 SourceRange Range = ReadSourceRange(F, Record, Idx); 4635 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 4636 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 4637 EllipsisLoc); 4638 Result.setInheritConstructors(inheritConstructors); 4639 return Result; 4640} 4641 4642std::pair<CXXCtorInitializer **, unsigned> 4643ASTReader::ReadCXXCtorInitializers(PerFileData &F, const RecordData &Record, 4644 unsigned &Idx) { 4645 CXXCtorInitializer **CtorInitializers = 0; 4646 unsigned NumInitializers = Record[Idx++]; 4647 if (NumInitializers) { 4648 ASTContext &C = *getContext(); 4649 4650 CtorInitializers 4651 = new (C) CXXCtorInitializer*[NumInitializers]; 4652 for (unsigned i=0; i != NumInitializers; ++i) { 4653 TypeSourceInfo *BaseClassInfo = 0; 4654 bool IsBaseVirtual = false; 4655 FieldDecl *Member = 0; 4656 IndirectFieldDecl *IndirectMember = 0; 4657 4658 bool IsBaseInitializer = Record[Idx++]; 4659 if (IsBaseInitializer) { 4660 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 4661 IsBaseVirtual = Record[Idx++]; 4662 } else { 4663 bool IsIndirectMemberInitializer = Record[Idx++]; 4664 if (IsIndirectMemberInitializer) 4665 IndirectMember = cast<IndirectFieldDecl>(GetDecl(Record[Idx++])); 4666 else 4667 Member = cast<FieldDecl>(GetDecl(Record[Idx++])); 4668 } 4669 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 4670 Expr *Init = ReadExpr(F); 4671 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 4672 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 4673 bool IsWritten = Record[Idx++]; 4674 unsigned SourceOrderOrNumArrayIndices; 4675 llvm::SmallVector<VarDecl *, 8> Indices; 4676 if (IsWritten) { 4677 SourceOrderOrNumArrayIndices = Record[Idx++]; 4678 } else { 4679 SourceOrderOrNumArrayIndices = Record[Idx++]; 4680 Indices.reserve(SourceOrderOrNumArrayIndices); 4681 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 4682 Indices.push_back(cast<VarDecl>(GetDecl(Record[Idx++]))); 4683 } 4684 4685 CXXCtorInitializer *BOMInit; 4686 if (IsBaseInitializer) { 4687 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 4688 LParenLoc, Init, RParenLoc, 4689 MemberOrEllipsisLoc); 4690 } else if (IsWritten) { 4691 if (Member) 4692 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 4693 LParenLoc, Init, RParenLoc); 4694 else 4695 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 4696 MemberOrEllipsisLoc, LParenLoc, 4697 Init, RParenLoc); 4698 } else { 4699 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 4700 LParenLoc, Init, RParenLoc, 4701 Indices.data(), Indices.size()); 4702 } 4703 4704 if (IsWritten) 4705 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 4706 CtorInitializers[i] = BOMInit; 4707 } 4708 } 4709 4710 return std::make_pair(CtorInitializers, NumInitializers); 4711} 4712 4713NestedNameSpecifier * 4714ASTReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) { 4715 unsigned N = Record[Idx++]; 4716 NestedNameSpecifier *NNS = 0, *Prev = 0; 4717 for (unsigned I = 0; I != N; ++I) { 4718 NestedNameSpecifier::SpecifierKind Kind 4719 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4720 switch (Kind) { 4721 case NestedNameSpecifier::Identifier: { 4722 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4723 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 4724 break; 4725 } 4726 4727 case NestedNameSpecifier::Namespace: { 4728 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4729 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 4730 break; 4731 } 4732 4733 case NestedNameSpecifier::NamespaceAlias: { 4734 NamespaceAliasDecl *Alias 4735 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4736 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 4737 break; 4738 } 4739 4740 case NestedNameSpecifier::TypeSpec: 4741 case NestedNameSpecifier::TypeSpecWithTemplate: { 4742 const Type *T = GetType(Record[Idx++]).getTypePtrOrNull(); 4743 if (!T) 4744 return 0; 4745 4746 bool Template = Record[Idx++]; 4747 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 4748 break; 4749 } 4750 4751 case NestedNameSpecifier::Global: { 4752 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 4753 // No associated value, and there can't be a prefix. 4754 break; 4755 } 4756 } 4757 Prev = NNS; 4758 } 4759 return NNS; 4760} 4761 4762NestedNameSpecifierLoc 4763ASTReader::ReadNestedNameSpecifierLoc(PerFileData &F, const RecordData &Record, 4764 unsigned &Idx) { 4765 unsigned N = Record[Idx++]; 4766 NestedNameSpecifierLocBuilder Builder; 4767 for (unsigned I = 0; I != N; ++I) { 4768 NestedNameSpecifier::SpecifierKind Kind 4769 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4770 switch (Kind) { 4771 case NestedNameSpecifier::Identifier: { 4772 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4773 SourceRange Range = ReadSourceRange(F, Record, Idx); 4774 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 4775 break; 4776 } 4777 4778 case NestedNameSpecifier::Namespace: { 4779 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4780 SourceRange Range = ReadSourceRange(F, Record, Idx); 4781 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 4782 break; 4783 } 4784 4785 case NestedNameSpecifier::NamespaceAlias: { 4786 NamespaceAliasDecl *Alias 4787 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4788 SourceRange Range = ReadSourceRange(F, Record, Idx); 4789 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 4790 break; 4791 } 4792 4793 case NestedNameSpecifier::TypeSpec: 4794 case NestedNameSpecifier::TypeSpecWithTemplate: { 4795 bool Template = Record[Idx++]; 4796 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 4797 if (!T) 4798 return NestedNameSpecifierLoc(); 4799 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4800 4801 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 4802 Builder.Extend(*Context, 4803 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 4804 T->getTypeLoc(), ColonColonLoc); 4805 break; 4806 } 4807 4808 case NestedNameSpecifier::Global: { 4809 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4810 Builder.MakeGlobal(*Context, ColonColonLoc); 4811 break; 4812 } 4813 } 4814 } 4815 4816 return Builder.getWithLocInContext(*Context); 4817} 4818 4819SourceRange 4820ASTReader::ReadSourceRange(PerFileData &F, const RecordData &Record, 4821 unsigned &Idx) { 4822 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 4823 SourceLocation end = ReadSourceLocation(F, Record, Idx); 4824 return SourceRange(beg, end); 4825} 4826 4827/// \brief Read an integral value 4828llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 4829 unsigned BitWidth = Record[Idx++]; 4830 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 4831 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 4832 Idx += NumWords; 4833 return Result; 4834} 4835 4836/// \brief Read a signed integral value 4837llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 4838 bool isUnsigned = Record[Idx++]; 4839 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 4840} 4841 4842/// \brief Read a floating-point value 4843llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 4844 return llvm::APFloat(ReadAPInt(Record, Idx)); 4845} 4846 4847// \brief Read a string 4848std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 4849 unsigned Len = Record[Idx++]; 4850 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 4851 Idx += Len; 4852 return Result; 4853} 4854 4855CXXTemporary *ASTReader::ReadCXXTemporary(const RecordData &Record, 4856 unsigned &Idx) { 4857 CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++])); 4858 return CXXTemporary::Create(*Context, Decl); 4859} 4860 4861DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 4862 return Diag(SourceLocation(), DiagID); 4863} 4864 4865DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 4866 return Diags.Report(Loc, DiagID); 4867} 4868 4869/// \brief Retrieve the identifier table associated with the 4870/// preprocessor. 4871IdentifierTable &ASTReader::getIdentifierTable() { 4872 assert(PP && "Forgot to set Preprocessor ?"); 4873 return PP->getIdentifierTable(); 4874} 4875 4876/// \brief Record that the given ID maps to the given switch-case 4877/// statement. 4878void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 4879 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 4880 SwitchCaseStmts[ID] = SC; 4881} 4882 4883/// \brief Retrieve the switch-case statement with the given ID. 4884SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 4885 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 4886 return SwitchCaseStmts[ID]; 4887} 4888 4889void ASTReader::ClearSwitchCaseIDs() { 4890 SwitchCaseStmts.clear(); 4891} 4892 4893void ASTReader::FinishedDeserializing() { 4894 assert(NumCurrentElementsDeserializing && 4895 "FinishedDeserializing not paired with StartedDeserializing"); 4896 if (NumCurrentElementsDeserializing == 1) { 4897 // If any identifiers with corresponding top-level declarations have 4898 // been loaded, load those declarations now. 4899 while (!PendingIdentifierInfos.empty()) { 4900 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 4901 PendingIdentifierInfos.front().DeclIDs, true); 4902 PendingIdentifierInfos.pop_front(); 4903 } 4904 4905 // Ready to load previous declarations of Decls that were delayed. 4906 while (!PendingPreviousDecls.empty()) { 4907 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 4908 PendingPreviousDecls.front().second); 4909 PendingPreviousDecls.pop_front(); 4910 } 4911 4912 // We are not in recursive loading, so it's safe to pass the "interesting" 4913 // decls to the consumer. 4914 if (Consumer) 4915 PassInterestingDeclsToConsumer(); 4916 4917 assert(PendingForwardRefs.size() == 0 && 4918 "Some forward refs did not get linked to the definition!"); 4919 } 4920 --NumCurrentElementsDeserializing; 4921} 4922 4923ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 4924 const char *isysroot, bool DisableValidation, 4925 bool DisableStatCache) 4926 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 4927 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 4928 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 4929 Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation), 4930 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4931 NumSLocEntriesRead(0), TotalNumSLocEntries(0), NextSLocOffset(0), 4932 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 4933 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 4934 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 4935 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 4936 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 4937 NumCurrentElementsDeserializing(0) 4938{ 4939 RelocatablePCH = false; 4940} 4941 4942ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 4943 Diagnostic &Diags, const char *isysroot, 4944 bool DisableValidation, bool DisableStatCache) 4945 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 4946 Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0), 4947 isysroot(isysroot), DisableValidation(DisableValidation), 4948 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4949 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 4950 NextSLocOffset(0), NumStatementsRead(0), TotalNumStatements(0), 4951 NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0), 4952 NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 4953 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 4954 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 4955 TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) { 4956 RelocatablePCH = false; 4957} 4958 4959ASTReader::~ASTReader() { 4960 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 4961 delete Chain[e - i - 1]; 4962 // Delete all visible decl lookup tables 4963 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 4964 E = DeclContextOffsets.end(); 4965 I != E; ++I) { 4966 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 4967 J != F; ++J) { 4968 if (J->NameLookupTableData) 4969 delete static_cast<ASTDeclContextNameLookupTable*>( 4970 J->NameLookupTableData); 4971 } 4972 } 4973 for (DeclContextVisibleUpdatesPending::iterator 4974 I = PendingVisibleUpdates.begin(), 4975 E = PendingVisibleUpdates.end(); 4976 I != E; ++I) { 4977 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 4978 F = I->second.end(); 4979 J != F; ++J) 4980 delete static_cast<ASTDeclContextNameLookupTable*>(*J); 4981 } 4982} 4983 4984ASTReader::PerFileData::PerFileData(ASTFileType Ty) 4985 : Type(Ty), SizeInBits(0), LocalNumSLocEntries(0), SLocOffsets(0), LocalSLocSize(0), 4986 LocalNumIdentifiers(0), IdentifierOffsets(0), IdentifierTableData(0), 4987 IdentifierLookupTable(0), LocalNumMacroDefinitions(0), 4988 MacroDefinitionOffsets(0), 4989 LocalNumHeaderFileInfos(0), HeaderFileInfoTableData(0), 4990 HeaderFileInfoTable(0), 4991 LocalNumSelectors(0), SelectorOffsets(0), 4992 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 4993 DeclOffsets(0), LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 4994 LocalNumTypes(0), TypeOffsets(0), StatCache(0), 4995 NumPreallocatedPreprocessingEntities(0), NextInSource(0) 4996{} 4997 4998ASTReader::PerFileData::~PerFileData() { 4999 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5000 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5001 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5002} 5003