ASTReader.cpp revision 1c51b1ca1fb835d8ee172b5804d66864ab3a0167
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 PARSE_LANGOPT(ElideConstructors); 2841 PARSE_LANGOPT(SpellChecking); 2842 #undef PARSE_LANGOPT 2843 2844 return Listener->ReadLanguageOptions(LangOpts); 2845 } 2846 2847 return false; 2848} 2849 2850void ASTReader::ReadPreprocessedEntities() { 2851 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2852 PerFileData &F = *Chain[I]; 2853 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 2854 continue; 2855 2856 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 2857 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 2858 while (LoadPreprocessedEntity(F)) { } 2859 } 2860} 2861 2862PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 2863 PerFileData *F = 0; 2864 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2865 if (Offset < Chain[I]->SizeInBits) { 2866 F = Chain[I]; 2867 break; 2868 } 2869 2870 Offset -= Chain[I]->SizeInBits; 2871 } 2872 2873 if (!F) { 2874 Error("Malformed preprocessed entity offset"); 2875 return 0; 2876 } 2877 2878 // Keep track of where we are in the stream, then jump back there 2879 // after reading this entity. 2880 SavedStreamPosition SavedPosition(F->PreprocessorDetailCursor); 2881 F->PreprocessorDetailCursor.JumpToBit(Offset); 2882 return LoadPreprocessedEntity(*F); 2883} 2884 2885HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 2886 HeaderFileInfoTrait Trait(FE->getName()); 2887 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2888 PerFileData &F = *Chain[I]; 2889 HeaderFileInfoLookupTable *Table 2890 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 2891 if (!Table) 2892 continue; 2893 2894 // Look in the on-disk hash table for an entry for this file name. 2895 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 2896 &Trait); 2897 if (Pos == Table->end()) 2898 continue; 2899 2900 HeaderFileInfo HFI = *Pos; 2901 if (Listener) 2902 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 2903 2904 return HFI; 2905 } 2906 2907 return HeaderFileInfo(); 2908} 2909 2910void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 2911 unsigned Idx = 0; 2912 while (Idx < PragmaDiagMappings.size()) { 2913 SourceLocation 2914 Loc = SourceLocation::getFromRawEncoding(PragmaDiagMappings[Idx++]); 2915 while (1) { 2916 assert(Idx < PragmaDiagMappings.size() && 2917 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 2918 if (Idx >= PragmaDiagMappings.size()) 2919 break; // Something is messed up but at least avoid infinite loop in 2920 // release build. 2921 unsigned DiagID = PragmaDiagMappings[Idx++]; 2922 if (DiagID == (unsigned)-1) 2923 break; // no more diag/map pairs for this location. 2924 diag::Mapping Map = (diag::Mapping)PragmaDiagMappings[Idx++]; 2925 Diag.setDiagnosticMapping(DiagID, Map, Loc); 2926 } 2927 } 2928} 2929 2930/// \brief Get the correct cursor and offset for loading a type. 2931ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 2932 PerFileData *F = 0; 2933 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2934 F = Chain[N - I - 1]; 2935 if (Index < F->LocalNumTypes) 2936 break; 2937 Index -= F->LocalNumTypes; 2938 } 2939 assert(F && F->LocalNumTypes > Index && "Broken chain"); 2940 return RecordLocation(F, F->TypeOffsets[Index]); 2941} 2942 2943/// \brief Read and return the type with the given index.. 2944/// 2945/// The index is the type ID, shifted and minus the number of predefs. This 2946/// routine actually reads the record corresponding to the type at the given 2947/// location. It is a helper routine for GetType, which deals with reading type 2948/// IDs. 2949QualType ASTReader::ReadTypeRecord(unsigned Index) { 2950 RecordLocation Loc = TypeCursorForIndex(Index); 2951 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 2952 2953 // Keep track of where we are in the stream, then jump back there 2954 // after reading this type. 2955 SavedStreamPosition SavedPosition(DeclsCursor); 2956 2957 ReadingKindTracker ReadingKind(Read_Type, *this); 2958 2959 // Note that we are loading a type record. 2960 Deserializing AType(this); 2961 2962 DeclsCursor.JumpToBit(Loc.Offset); 2963 RecordData Record; 2964 unsigned Code = DeclsCursor.ReadCode(); 2965 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 2966 case TYPE_EXT_QUAL: { 2967 if (Record.size() != 2) { 2968 Error("Incorrect encoding of extended qualifier type"); 2969 return QualType(); 2970 } 2971 QualType Base = GetType(Record[0]); 2972 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]); 2973 return Context->getQualifiedType(Base, Quals); 2974 } 2975 2976 case TYPE_COMPLEX: { 2977 if (Record.size() != 1) { 2978 Error("Incorrect encoding of complex type"); 2979 return QualType(); 2980 } 2981 QualType ElemType = GetType(Record[0]); 2982 return Context->getComplexType(ElemType); 2983 } 2984 2985 case TYPE_POINTER: { 2986 if (Record.size() != 1) { 2987 Error("Incorrect encoding of pointer type"); 2988 return QualType(); 2989 } 2990 QualType PointeeType = GetType(Record[0]); 2991 return Context->getPointerType(PointeeType); 2992 } 2993 2994 case TYPE_BLOCK_POINTER: { 2995 if (Record.size() != 1) { 2996 Error("Incorrect encoding of block pointer type"); 2997 return QualType(); 2998 } 2999 QualType PointeeType = GetType(Record[0]); 3000 return Context->getBlockPointerType(PointeeType); 3001 } 3002 3003 case TYPE_LVALUE_REFERENCE: { 3004 if (Record.size() != 1) { 3005 Error("Incorrect encoding of lvalue reference type"); 3006 return QualType(); 3007 } 3008 QualType PointeeType = GetType(Record[0]); 3009 return Context->getLValueReferenceType(PointeeType); 3010 } 3011 3012 case TYPE_RVALUE_REFERENCE: { 3013 if (Record.size() != 1) { 3014 Error("Incorrect encoding of rvalue reference type"); 3015 return QualType(); 3016 } 3017 QualType PointeeType = GetType(Record[0]); 3018 return Context->getRValueReferenceType(PointeeType); 3019 } 3020 3021 case TYPE_MEMBER_POINTER: { 3022 if (Record.size() != 2) { 3023 Error("Incorrect encoding of member pointer type"); 3024 return QualType(); 3025 } 3026 QualType PointeeType = GetType(Record[0]); 3027 QualType ClassType = GetType(Record[1]); 3028 if (PointeeType.isNull() || ClassType.isNull()) 3029 return QualType(); 3030 3031 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3032 } 3033 3034 case TYPE_CONSTANT_ARRAY: { 3035 QualType ElementType = GetType(Record[0]); 3036 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3037 unsigned IndexTypeQuals = Record[2]; 3038 unsigned Idx = 3; 3039 llvm::APInt Size = ReadAPInt(Record, Idx); 3040 return Context->getConstantArrayType(ElementType, Size, 3041 ASM, IndexTypeQuals); 3042 } 3043 3044 case TYPE_INCOMPLETE_ARRAY: { 3045 QualType ElementType = GetType(Record[0]); 3046 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3047 unsigned IndexTypeQuals = Record[2]; 3048 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3049 } 3050 3051 case TYPE_VARIABLE_ARRAY: { 3052 QualType ElementType = GetType(Record[0]); 3053 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3054 unsigned IndexTypeQuals = Record[2]; 3055 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3056 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3057 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3058 ASM, IndexTypeQuals, 3059 SourceRange(LBLoc, RBLoc)); 3060 } 3061 3062 case TYPE_VECTOR: { 3063 if (Record.size() != 3) { 3064 Error("incorrect encoding of vector type in AST file"); 3065 return QualType(); 3066 } 3067 3068 QualType ElementType = GetType(Record[0]); 3069 unsigned NumElements = Record[1]; 3070 unsigned VecKind = Record[2]; 3071 return Context->getVectorType(ElementType, NumElements, 3072 (VectorType::VectorKind)VecKind); 3073 } 3074 3075 case TYPE_EXT_VECTOR: { 3076 if (Record.size() != 3) { 3077 Error("incorrect encoding of extended vector type in AST file"); 3078 return QualType(); 3079 } 3080 3081 QualType ElementType = GetType(Record[0]); 3082 unsigned NumElements = Record[1]; 3083 return Context->getExtVectorType(ElementType, NumElements); 3084 } 3085 3086 case TYPE_FUNCTION_NO_PROTO: { 3087 if (Record.size() != 4) { 3088 Error("incorrect encoding of no-proto function type"); 3089 return QualType(); 3090 } 3091 QualType ResultType = GetType(Record[0]); 3092 FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]); 3093 return Context->getFunctionNoProtoType(ResultType, Info); 3094 } 3095 3096 case TYPE_FUNCTION_PROTO: { 3097 QualType ResultType = GetType(Record[0]); 3098 3099 FunctionProtoType::ExtProtoInfo EPI; 3100 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3101 /*regparm*/ Record[2], 3102 static_cast<CallingConv>(Record[3])); 3103 3104 unsigned Idx = 4; 3105 unsigned NumParams = Record[Idx++]; 3106 llvm::SmallVector<QualType, 16> ParamTypes; 3107 for (unsigned I = 0; I != NumParams; ++I) 3108 ParamTypes.push_back(GetType(Record[Idx++])); 3109 3110 EPI.Variadic = Record[Idx++]; 3111 EPI.TypeQuals = Record[Idx++]; 3112 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3113 EPI.HasExceptionSpec = Record[Idx++]; 3114 EPI.HasAnyExceptionSpec = Record[Idx++]; 3115 EPI.NumExceptions = Record[Idx++]; 3116 llvm::SmallVector<QualType, 2> Exceptions; 3117 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3118 Exceptions.push_back(GetType(Record[Idx++])); 3119 EPI.Exceptions = Exceptions.data(); 3120 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3121 EPI); 3122 } 3123 3124 case TYPE_UNRESOLVED_USING: 3125 return Context->getTypeDeclType( 3126 cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0]))); 3127 3128 case TYPE_TYPEDEF: { 3129 if (Record.size() != 2) { 3130 Error("incorrect encoding of typedef type"); 3131 return QualType(); 3132 } 3133 TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0])); 3134 QualType Canonical = GetType(Record[1]); 3135 if (!Canonical.isNull()) 3136 Canonical = Context->getCanonicalType(Canonical); 3137 return Context->getTypedefType(Decl, Canonical); 3138 } 3139 3140 case TYPE_TYPEOF_EXPR: 3141 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3142 3143 case TYPE_TYPEOF: { 3144 if (Record.size() != 1) { 3145 Error("incorrect encoding of typeof(type) in AST file"); 3146 return QualType(); 3147 } 3148 QualType UnderlyingType = GetType(Record[0]); 3149 return Context->getTypeOfType(UnderlyingType); 3150 } 3151 3152 case TYPE_DECLTYPE: 3153 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3154 3155 case TYPE_AUTO: 3156 return Context->getAutoType(GetType(Record[0])); 3157 3158 case TYPE_RECORD: { 3159 if (Record.size() != 2) { 3160 Error("incorrect encoding of record type"); 3161 return QualType(); 3162 } 3163 bool IsDependent = Record[0]; 3164 QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1]))); 3165 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3166 return T; 3167 } 3168 3169 case TYPE_ENUM: { 3170 if (Record.size() != 2) { 3171 Error("incorrect encoding of enum type"); 3172 return QualType(); 3173 } 3174 bool IsDependent = Record[0]; 3175 QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1]))); 3176 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3177 return T; 3178 } 3179 3180 case TYPE_ATTRIBUTED: { 3181 if (Record.size() != 3) { 3182 Error("incorrect encoding of attributed type"); 3183 return QualType(); 3184 } 3185 QualType modifiedType = GetType(Record[0]); 3186 QualType equivalentType = GetType(Record[1]); 3187 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3188 return Context->getAttributedType(kind, modifiedType, equivalentType); 3189 } 3190 3191 case TYPE_PAREN: { 3192 if (Record.size() != 1) { 3193 Error("incorrect encoding of paren type"); 3194 return QualType(); 3195 } 3196 QualType InnerType = GetType(Record[0]); 3197 return Context->getParenType(InnerType); 3198 } 3199 3200 case TYPE_PACK_EXPANSION: { 3201 if (Record.size() != 2) { 3202 Error("incorrect encoding of pack expansion type"); 3203 return QualType(); 3204 } 3205 QualType Pattern = GetType(Record[0]); 3206 if (Pattern.isNull()) 3207 return QualType(); 3208 llvm::Optional<unsigned> NumExpansions; 3209 if (Record[1]) 3210 NumExpansions = Record[1] - 1; 3211 return Context->getPackExpansionType(Pattern, NumExpansions); 3212 } 3213 3214 case TYPE_ELABORATED: { 3215 unsigned Idx = 0; 3216 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3217 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3218 QualType NamedType = GetType(Record[Idx++]); 3219 return Context->getElaboratedType(Keyword, NNS, NamedType); 3220 } 3221 3222 case TYPE_OBJC_INTERFACE: { 3223 unsigned Idx = 0; 3224 ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++])); 3225 return Context->getObjCInterfaceType(ItfD); 3226 } 3227 3228 case TYPE_OBJC_OBJECT: { 3229 unsigned Idx = 0; 3230 QualType Base = GetType(Record[Idx++]); 3231 unsigned NumProtos = Record[Idx++]; 3232 llvm::SmallVector<ObjCProtocolDecl*, 4> Protos; 3233 for (unsigned I = 0; I != NumProtos; ++I) 3234 Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++]))); 3235 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3236 } 3237 3238 case TYPE_OBJC_OBJECT_POINTER: { 3239 unsigned Idx = 0; 3240 QualType Pointee = GetType(Record[Idx++]); 3241 return Context->getObjCObjectPointerType(Pointee); 3242 } 3243 3244 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3245 unsigned Idx = 0; 3246 QualType Parm = GetType(Record[Idx++]); 3247 QualType Replacement = GetType(Record[Idx++]); 3248 return 3249 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3250 Replacement); 3251 } 3252 3253 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3254 unsigned Idx = 0; 3255 QualType Parm = GetType(Record[Idx++]); 3256 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3257 return Context->getSubstTemplateTypeParmPackType( 3258 cast<TemplateTypeParmType>(Parm), 3259 ArgPack); 3260 } 3261 3262 case TYPE_INJECTED_CLASS_NAME: { 3263 CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0])); 3264 QualType TST = GetType(Record[1]); // probably derivable 3265 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3266 // for AST reading, too much interdependencies. 3267 return 3268 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3269 } 3270 3271 case TYPE_TEMPLATE_TYPE_PARM: { 3272 unsigned Idx = 0; 3273 unsigned Depth = Record[Idx++]; 3274 unsigned Index = Record[Idx++]; 3275 bool Pack = Record[Idx++]; 3276 IdentifierInfo *Name = GetIdentifierInfo(Record, Idx); 3277 return Context->getTemplateTypeParmType(Depth, Index, Pack, Name); 3278 } 3279 3280 case TYPE_DEPENDENT_NAME: { 3281 unsigned Idx = 0; 3282 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3283 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3284 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3285 QualType Canon = GetType(Record[Idx++]); 3286 if (!Canon.isNull()) 3287 Canon = Context->getCanonicalType(Canon); 3288 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3289 } 3290 3291 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3292 unsigned Idx = 0; 3293 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3294 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3295 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3296 unsigned NumArgs = Record[Idx++]; 3297 llvm::SmallVector<TemplateArgument, 8> Args; 3298 Args.reserve(NumArgs); 3299 while (NumArgs--) 3300 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3301 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3302 Args.size(), Args.data()); 3303 } 3304 3305 case TYPE_DEPENDENT_SIZED_ARRAY: { 3306 unsigned Idx = 0; 3307 3308 // ArrayType 3309 QualType ElementType = GetType(Record[Idx++]); 3310 ArrayType::ArraySizeModifier ASM 3311 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3312 unsigned IndexTypeQuals = Record[Idx++]; 3313 3314 // DependentSizedArrayType 3315 Expr *NumElts = ReadExpr(*Loc.F); 3316 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3317 3318 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3319 IndexTypeQuals, Brackets); 3320 } 3321 3322 case TYPE_TEMPLATE_SPECIALIZATION: { 3323 unsigned Idx = 0; 3324 bool IsDependent = Record[Idx++]; 3325 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3326 llvm::SmallVector<TemplateArgument, 8> Args; 3327 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3328 QualType Canon = GetType(Record[Idx++]); 3329 QualType T; 3330 if (Canon.isNull()) 3331 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3332 Args.size()); 3333 else 3334 T = Context->getTemplateSpecializationType(Name, Args.data(), 3335 Args.size(), Canon); 3336 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3337 return T; 3338 } 3339 } 3340 // Suppress a GCC warning 3341 return QualType(); 3342} 3343 3344class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3345 ASTReader &Reader; 3346 ASTReader::PerFileData &F; 3347 llvm::BitstreamCursor &DeclsCursor; 3348 const ASTReader::RecordData &Record; 3349 unsigned &Idx; 3350 3351 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3352 unsigned &I) { 3353 return Reader.ReadSourceLocation(F, R, I); 3354 } 3355 3356public: 3357 TypeLocReader(ASTReader &Reader, ASTReader::PerFileData &F, 3358 const ASTReader::RecordData &Record, unsigned &Idx) 3359 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3360 { } 3361 3362 // We want compile-time assurance that we've enumerated all of 3363 // these, so unfortunately we have to declare them first, then 3364 // define them out-of-line. 3365#define ABSTRACT_TYPELOC(CLASS, PARENT) 3366#define TYPELOC(CLASS, PARENT) \ 3367 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3368#include "clang/AST/TypeLocNodes.def" 3369 3370 void VisitFunctionTypeLoc(FunctionTypeLoc); 3371 void VisitArrayTypeLoc(ArrayTypeLoc); 3372}; 3373 3374void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3375 // nothing to do 3376} 3377void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3378 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3379 if (TL.needsExtraLocalData()) { 3380 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3381 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3382 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3383 TL.setModeAttr(Record[Idx++]); 3384 } 3385} 3386void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3387 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3388} 3389void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3390 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3391} 3392void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3393 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3394} 3395void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3396 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3397} 3398void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3399 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3400} 3401void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3402 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3403} 3404void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3405 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3406 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3407 if (Record[Idx++]) 3408 TL.setSizeExpr(Reader.ReadExpr(F)); 3409 else 3410 TL.setSizeExpr(0); 3411} 3412void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3413 VisitArrayTypeLoc(TL); 3414} 3415void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3416 VisitArrayTypeLoc(TL); 3417} 3418void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3419 VisitArrayTypeLoc(TL); 3420} 3421void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3422 DependentSizedArrayTypeLoc TL) { 3423 VisitArrayTypeLoc(TL); 3424} 3425void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3426 DependentSizedExtVectorTypeLoc TL) { 3427 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3428} 3429void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3430 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3431} 3432void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3433 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3434} 3435void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3436 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3437 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3438 TL.setTrailingReturn(Record[Idx++]); 3439 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3440 TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++]))); 3441 } 3442} 3443void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3444 VisitFunctionTypeLoc(TL); 3445} 3446void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3447 VisitFunctionTypeLoc(TL); 3448} 3449void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3450 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3451} 3452void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3453 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3454} 3455void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3456 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3457 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3458 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3459} 3460void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3461 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3462 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3463 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3464 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3465} 3466void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3467 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3468} 3469void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3470 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3471} 3472void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3473 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3474} 3475void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3476 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3477} 3478void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3479 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3480 if (TL.hasAttrOperand()) { 3481 SourceRange range; 3482 range.setBegin(ReadSourceLocation(Record, Idx)); 3483 range.setEnd(ReadSourceLocation(Record, Idx)); 3484 TL.setAttrOperandParensRange(range); 3485 } 3486 if (TL.hasAttrExprOperand()) { 3487 if (Record[Idx++]) 3488 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3489 else 3490 TL.setAttrExprOperand(0); 3491 } else if (TL.hasAttrEnumOperand()) 3492 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3493} 3494void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3495 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3496} 3497void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3498 SubstTemplateTypeParmTypeLoc TL) { 3499 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3500} 3501void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3502 SubstTemplateTypeParmPackTypeLoc TL) { 3503 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3504} 3505void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3506 TemplateSpecializationTypeLoc TL) { 3507 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3508 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3509 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3510 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3511 TL.setArgLocInfo(i, 3512 Reader.GetTemplateArgumentLocInfo(F, 3513 TL.getTypePtr()->getArg(i).getKind(), 3514 Record, Idx)); 3515} 3516void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3517 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3518 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3519} 3520void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3521 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3522 TL.setQualifierRange(Reader.ReadSourceRange(F, Record, Idx)); 3523} 3524void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3525 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3526} 3527void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3528 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3529 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3530 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3531} 3532void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3533 DependentTemplateSpecializationTypeLoc TL) { 3534 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3535 TL.setQualifierRange(Reader.ReadSourceRange(F, Record, Idx)); 3536 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3537 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3538 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3539 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3540 TL.setArgLocInfo(I, 3541 Reader.GetTemplateArgumentLocInfo(F, 3542 TL.getTypePtr()->getArg(I).getKind(), 3543 Record, Idx)); 3544} 3545void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3546 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3547} 3548void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3549 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3550} 3551void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3552 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3553 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3554 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3555 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3556 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3557} 3558void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3559 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3560} 3561 3562TypeSourceInfo *ASTReader::GetTypeSourceInfo(PerFileData &F, 3563 const RecordData &Record, 3564 unsigned &Idx) { 3565 QualType InfoTy = GetType(Record[Idx++]); 3566 if (InfoTy.isNull()) 3567 return 0; 3568 3569 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3570 TypeLocReader TLR(*this, F, Record, Idx); 3571 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3572 TLR.Visit(TL); 3573 return TInfo; 3574} 3575 3576QualType ASTReader::GetType(TypeID ID) { 3577 unsigned FastQuals = ID & Qualifiers::FastMask; 3578 unsigned Index = ID >> Qualifiers::FastWidth; 3579 3580 if (Index < NUM_PREDEF_TYPE_IDS) { 3581 QualType T; 3582 switch ((PredefinedTypeIDs)Index) { 3583 case PREDEF_TYPE_NULL_ID: return QualType(); 3584 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3585 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3586 3587 case PREDEF_TYPE_CHAR_U_ID: 3588 case PREDEF_TYPE_CHAR_S_ID: 3589 // FIXME: Check that the signedness of CharTy is correct! 3590 T = Context->CharTy; 3591 break; 3592 3593 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3594 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3595 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3596 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3597 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 3598 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 3599 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 3600 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 3601 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 3602 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 3603 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 3604 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 3605 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 3606 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 3607 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 3608 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 3609 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 3610 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 3611 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 3612 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 3613 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 3614 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 3615 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 3616 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 3617 } 3618 3619 assert(!T.isNull() && "Unknown predefined type"); 3620 return T.withFastQualifiers(FastQuals); 3621 } 3622 3623 Index -= NUM_PREDEF_TYPE_IDS; 3624 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 3625 if (TypesLoaded[Index].isNull()) { 3626 TypesLoaded[Index] = ReadTypeRecord(Index); 3627 if (TypesLoaded[Index].isNull()) 3628 return QualType(); 3629 3630 TypesLoaded[Index]->setFromAST(); 3631 TypeIdxs[TypesLoaded[Index]] = TypeIdx::fromTypeID(ID); 3632 if (DeserializationListener) 3633 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 3634 TypesLoaded[Index]); 3635 } 3636 3637 return TypesLoaded[Index].withFastQualifiers(FastQuals); 3638} 3639 3640TypeID ASTReader::GetTypeID(QualType T) const { 3641 return MakeTypeID(T, 3642 std::bind1st(std::mem_fun(&ASTReader::GetTypeIdx), this)); 3643} 3644 3645TypeIdx ASTReader::GetTypeIdx(QualType T) const { 3646 if (T.isNull()) 3647 return TypeIdx(); 3648 assert(!T.getLocalFastQualifiers()); 3649 3650 TypeIdxMap::const_iterator I = TypeIdxs.find(T); 3651 // GetTypeIdx is mostly used for computing the hash of DeclarationNames and 3652 // comparing keys of ASTDeclContextNameLookupTable. 3653 // If the type didn't come from the AST file use a specially marked index 3654 // so that any hash/key comparison fail since no such index is stored 3655 // in a AST file. 3656 if (I == TypeIdxs.end()) 3657 return TypeIdx(-1); 3658 return I->second; 3659} 3660 3661unsigned ASTReader::getTotalNumCXXBaseSpecifiers() const { 3662 unsigned Result = 0; 3663 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 3664 Result += Chain[I]->LocalNumCXXBaseSpecifiers; 3665 3666 return Result; 3667} 3668 3669TemplateArgumentLocInfo 3670ASTReader::GetTemplateArgumentLocInfo(PerFileData &F, 3671 TemplateArgument::ArgKind Kind, 3672 const RecordData &Record, 3673 unsigned &Index) { 3674 switch (Kind) { 3675 case TemplateArgument::Expression: 3676 return ReadExpr(F); 3677 case TemplateArgument::Type: 3678 return GetTypeSourceInfo(F, Record, Index); 3679 case TemplateArgument::Template: { 3680 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3681 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3682 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3683 SourceLocation()); 3684 } 3685 case TemplateArgument::TemplateExpansion: { 3686 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3687 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3688 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 3689 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3690 EllipsisLoc); 3691 } 3692 case TemplateArgument::Null: 3693 case TemplateArgument::Integral: 3694 case TemplateArgument::Declaration: 3695 case TemplateArgument::Pack: 3696 return TemplateArgumentLocInfo(); 3697 } 3698 llvm_unreachable("unexpected template argument loc"); 3699 return TemplateArgumentLocInfo(); 3700} 3701 3702TemplateArgumentLoc 3703ASTReader::ReadTemplateArgumentLoc(PerFileData &F, 3704 const RecordData &Record, unsigned &Index) { 3705 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 3706 3707 if (Arg.getKind() == TemplateArgument::Expression) { 3708 if (Record[Index++]) // bool InfoHasSameExpr. 3709 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 3710 } 3711 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 3712 Record, Index)); 3713} 3714 3715Decl *ASTReader::GetExternalDecl(uint32_t ID) { 3716 return GetDecl(ID); 3717} 3718 3719uint64_t 3720ASTReader::GetCXXBaseSpecifiersOffset(serialization::CXXBaseSpecifiersID ID) { 3721 if (ID == 0) 3722 return 0; 3723 3724 --ID; 3725 uint64_t Offset = 0; 3726 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3727 if (ID < Chain[I]->LocalNumCXXBaseSpecifiers) 3728 return Offset + Chain[I]->CXXBaseSpecifiersOffsets[ID]; 3729 3730 ID -= Chain[I]->LocalNumCXXBaseSpecifiers; 3731 Offset += Chain[I]->SizeInBits; 3732 } 3733 3734 assert(false && "CXXBaseSpecifiers not found"); 3735 return 0; 3736} 3737 3738CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 3739 // Figure out which AST file contains this offset. 3740 PerFileData *F = 0; 3741 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3742 if (Offset < Chain[I]->SizeInBits) { 3743 F = Chain[I]; 3744 break; 3745 } 3746 3747 Offset -= Chain[I]->SizeInBits; 3748 } 3749 3750 if (!F) { 3751 Error("Malformed AST file: C++ base specifiers at impossible offset"); 3752 return 0; 3753 } 3754 3755 llvm::BitstreamCursor &Cursor = F->DeclsCursor; 3756 SavedStreamPosition SavedPosition(Cursor); 3757 Cursor.JumpToBit(Offset); 3758 ReadingKindTracker ReadingKind(Read_Decl, *this); 3759 RecordData Record; 3760 unsigned Code = Cursor.ReadCode(); 3761 unsigned RecCode = Cursor.ReadRecord(Code, Record); 3762 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 3763 Error("Malformed AST file: missing C++ base specifiers"); 3764 return 0; 3765 } 3766 3767 unsigned Idx = 0; 3768 unsigned NumBases = Record[Idx++]; 3769 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 3770 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 3771 for (unsigned I = 0; I != NumBases; ++I) 3772 Bases[I] = ReadCXXBaseSpecifier(*F, Record, Idx); 3773 return Bases; 3774} 3775 3776TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 3777 if (!DeclsLoaded[0]) { 3778 ReadDeclRecord(0, 1); 3779 if (DeserializationListener) 3780 DeserializationListener->DeclRead(1, DeclsLoaded[0]); 3781 } 3782 3783 return cast<TranslationUnitDecl>(DeclsLoaded[0]); 3784} 3785 3786Decl *ASTReader::GetDecl(DeclID ID) { 3787 if (ID == 0) 3788 return 0; 3789 3790 if (ID > DeclsLoaded.size()) { 3791 Error("declaration ID out-of-range for AST file"); 3792 return 0; 3793 } 3794 3795 unsigned Index = ID - 1; 3796 if (!DeclsLoaded[Index]) { 3797 ReadDeclRecord(Index, ID); 3798 if (DeserializationListener) 3799 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 3800 } 3801 3802 return DeclsLoaded[Index]; 3803} 3804 3805/// \brief Resolve the offset of a statement into a statement. 3806/// 3807/// This operation will read a new statement from the external 3808/// source each time it is called, and is meant to be used via a 3809/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 3810Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 3811 // Switch case IDs are per Decl. 3812 ClearSwitchCaseIDs(); 3813 3814 // Offset here is a global offset across the entire chain. 3815 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3816 PerFileData &F = *Chain[N - I - 1]; 3817 if (Offset < F.SizeInBits) { 3818 // Since we know that this statement is part of a decl, make sure to use 3819 // the decl cursor to read it. 3820 F.DeclsCursor.JumpToBit(Offset); 3821 return ReadStmtFromStream(F); 3822 } 3823 Offset -= F.SizeInBits; 3824 } 3825 llvm_unreachable("Broken chain"); 3826} 3827 3828bool ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 3829 bool (*isKindWeWant)(Decl::Kind), 3830 llvm::SmallVectorImpl<Decl*> &Decls) { 3831 assert(DC->hasExternalLexicalStorage() && 3832 "DeclContext has no lexical decls in storage"); 3833 3834 // There might be lexical decls in multiple parts of the chain, for the TU 3835 // at least. 3836 // DeclContextOffsets might reallocate as we load additional decls below, 3837 // so make a copy of the vector. 3838 DeclContextInfos Infos = DeclContextOffsets[DC]; 3839 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3840 I != E; ++I) { 3841 // IDs can be 0 if this context doesn't contain declarations. 3842 if (!I->LexicalDecls) 3843 continue; 3844 3845 // Load all of the declaration IDs 3846 for (const KindDeclIDPair *ID = I->LexicalDecls, 3847 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 3848 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 3849 continue; 3850 3851 Decl *D = GetDecl(ID->second); 3852 assert(D && "Null decl in lexical decls"); 3853 Decls.push_back(D); 3854 } 3855 } 3856 3857 ++NumLexicalDeclContextsRead; 3858 return false; 3859} 3860 3861DeclContext::lookup_result 3862ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 3863 DeclarationName Name) { 3864 assert(DC->hasExternalVisibleStorage() && 3865 "DeclContext has no visible decls in storage"); 3866 if (!Name) 3867 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 3868 DeclContext::lookup_iterator(0)); 3869 3870 llvm::SmallVector<NamedDecl *, 64> Decls; 3871 // There might be visible decls in multiple parts of the chain, for the TU 3872 // and namespaces. For any given name, the last available results replace 3873 // all earlier ones. For this reason, we walk in reverse. 3874 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3875 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 3876 I != E; ++I) { 3877 if (!I->NameLookupTableData) 3878 continue; 3879 3880 ASTDeclContextNameLookupTable *LookupTable = 3881 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3882 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 3883 if (Pos == LookupTable->end()) 3884 continue; 3885 3886 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 3887 for (; Data.first != Data.second; ++Data.first) 3888 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3889 break; 3890 } 3891 3892 ++NumVisibleDeclContextsRead; 3893 3894 SetExternalVisibleDeclsForName(DC, Name, Decls); 3895 return const_cast<DeclContext*>(DC)->lookup(Name); 3896} 3897 3898void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 3899 assert(DC->hasExternalVisibleStorage() && 3900 "DeclContext has no visible decls in storage"); 3901 3902 llvm::SmallVector<NamedDecl *, 64> Decls; 3903 // There might be visible decls in multiple parts of the chain, for the TU 3904 // and namespaces. 3905 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3906 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3907 I != E; ++I) { 3908 if (!I->NameLookupTableData) 3909 continue; 3910 3911 ASTDeclContextNameLookupTable *LookupTable = 3912 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3913 for (ASTDeclContextNameLookupTable::item_iterator 3914 ItemI = LookupTable->item_begin(), 3915 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 3916 ASTDeclContextNameLookupTable::item_iterator::value_type Val 3917 = *ItemI; 3918 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 3919 Decls.clear(); 3920 for (; Data.first != Data.second; ++Data.first) 3921 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3922 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 3923 } 3924 } 3925} 3926 3927void ASTReader::PassInterestingDeclsToConsumer() { 3928 assert(Consumer); 3929 while (!InterestingDecls.empty()) { 3930 DeclGroupRef DG(InterestingDecls.front()); 3931 InterestingDecls.pop_front(); 3932 Consumer->HandleInterestingDecl(DG); 3933 } 3934} 3935 3936void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 3937 this->Consumer = Consumer; 3938 3939 if (!Consumer) 3940 return; 3941 3942 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 3943 // Force deserialization of this decl, which will cause it to be queued for 3944 // passing to the consumer. 3945 GetDecl(ExternalDefinitions[I]); 3946 } 3947 3948 PassInterestingDeclsToConsumer(); 3949} 3950 3951void ASTReader::PrintStats() { 3952 std::fprintf(stderr, "*** AST File Statistics:\n"); 3953 3954 unsigned NumTypesLoaded 3955 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 3956 QualType()); 3957 unsigned NumDeclsLoaded 3958 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 3959 (Decl *)0); 3960 unsigned NumIdentifiersLoaded 3961 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 3962 IdentifiersLoaded.end(), 3963 (IdentifierInfo *)0); 3964 unsigned NumSelectorsLoaded 3965 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 3966 SelectorsLoaded.end(), 3967 Selector()); 3968 3969 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 3970 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 3971 if (TotalNumSLocEntries) 3972 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 3973 NumSLocEntriesRead, TotalNumSLocEntries, 3974 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 3975 if (!TypesLoaded.empty()) 3976 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 3977 NumTypesLoaded, (unsigned)TypesLoaded.size(), 3978 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 3979 if (!DeclsLoaded.empty()) 3980 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 3981 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 3982 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 3983 if (!IdentifiersLoaded.empty()) 3984 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 3985 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 3986 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 3987 if (!SelectorsLoaded.empty()) 3988 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 3989 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 3990 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 3991 if (TotalNumStatements) 3992 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 3993 NumStatementsRead, TotalNumStatements, 3994 ((float)NumStatementsRead/TotalNumStatements * 100)); 3995 if (TotalNumMacros) 3996 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 3997 NumMacrosRead, TotalNumMacros, 3998 ((float)NumMacrosRead/TotalNumMacros * 100)); 3999 if (TotalLexicalDeclContexts) 4000 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4001 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4002 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4003 * 100)); 4004 if (TotalVisibleDeclContexts) 4005 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4006 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4007 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4008 * 100)); 4009 if (TotalNumMethodPoolEntries) { 4010 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4011 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4012 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4013 * 100)); 4014 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4015 } 4016 std::fprintf(stderr, "\n"); 4017} 4018 4019void ASTReader::InitializeSema(Sema &S) { 4020 SemaObj = &S; 4021 S.ExternalSource = this; 4022 4023 // Makes sure any declarations that were deserialized "too early" 4024 // still get added to the identifier's declaration chains. 4025 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4026 if (SemaObj->TUScope) 4027 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4028 4029 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4030 } 4031 PreloadedDecls.clear(); 4032 4033 // If there were any tentative definitions, deserialize them and add 4034 // them to Sema's list of tentative definitions. 4035 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4036 VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I])); 4037 SemaObj->TentativeDefinitions.push_back(Var); 4038 } 4039 4040 // If there were any unused file scoped decls, deserialize them and add to 4041 // Sema's list of unused file scoped decls. 4042 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4043 DeclaratorDecl *D = cast<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4044 SemaObj->UnusedFileScopedDecls.push_back(D); 4045 } 4046 4047 // If there were any locally-scoped external declarations, 4048 // deserialize them and add them to Sema's table of locally-scoped 4049 // external declarations. 4050 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4051 NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4052 SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D; 4053 } 4054 4055 // If there were any ext_vector type declarations, deserialize them 4056 // and add them to Sema's vector of such declarations. 4057 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) 4058 SemaObj->ExtVectorDecls.push_back( 4059 cast<TypedefDecl>(GetDecl(ExtVectorDecls[I]))); 4060 4061 // FIXME: Do VTable uses and dynamic classes deserialize too much ? 4062 // Can we cut them down before writing them ? 4063 4064 // If there were any dynamic classes declarations, deserialize them 4065 // and add them to Sema's vector of such declarations. 4066 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) 4067 SemaObj->DynamicClasses.push_back( 4068 cast<CXXRecordDecl>(GetDecl(DynamicClasses[I]))); 4069 4070 // Load the offsets of the declarations that Sema references. 4071 // They will be lazily deserialized when needed. 4072 if (!SemaDeclRefs.empty()) { 4073 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4074 SemaObj->StdNamespace = SemaDeclRefs[0]; 4075 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4076 } 4077 4078 for (PerFileData *F = FirstInSource; F; F = F->NextInSource) { 4079 4080 // If there are @selector references added them to its pool. This is for 4081 // implementation of -Wselector. 4082 if (!F->ReferencedSelectorsData.empty()) { 4083 unsigned int DataSize = F->ReferencedSelectorsData.size()-1; 4084 unsigned I = 0; 4085 while (I < DataSize) { 4086 Selector Sel = DecodeSelector(F->ReferencedSelectorsData[I++]); 4087 SourceLocation SelLoc = ReadSourceLocation( 4088 *F, F->ReferencedSelectorsData, I); 4089 SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc)); 4090 } 4091 } 4092 4093 // If there were any pending implicit instantiations, deserialize them 4094 // and add them to Sema's queue of such instantiations. 4095 assert(F->PendingInstantiations.size() % 2 == 0 && 4096 "Expected pairs of entries"); 4097 for (unsigned Idx = 0, N = F->PendingInstantiations.size(); Idx < N;) { 4098 ValueDecl *D=cast<ValueDecl>(GetDecl(F->PendingInstantiations[Idx++])); 4099 SourceLocation Loc = ReadSourceLocation(*F, F->PendingInstantiations,Idx); 4100 SemaObj->PendingInstantiations.push_back(std::make_pair(D, Loc)); 4101 } 4102 } 4103 4104 // The two special data sets below always come from the most recent PCH, 4105 // which is at the front of the chain. 4106 PerFileData &F = *Chain.front(); 4107 4108 // If there were any weak undeclared identifiers, deserialize them and add to 4109 // Sema's list of weak undeclared identifiers. 4110 if (!WeakUndeclaredIdentifiers.empty()) { 4111 unsigned Idx = 0; 4112 for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) { 4113 IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4114 IdentifierInfo *AliasId= GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4115 SourceLocation Loc = ReadSourceLocation(F, WeakUndeclaredIdentifiers,Idx); 4116 bool Used = WeakUndeclaredIdentifiers[Idx++]; 4117 Sema::WeakInfo WI(AliasId, Loc); 4118 WI.setUsed(Used); 4119 SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI)); 4120 } 4121 } 4122 4123 // If there were any VTable uses, deserialize the information and add it 4124 // to Sema's vector and map of VTable uses. 4125 if (!VTableUses.empty()) { 4126 unsigned Idx = 0; 4127 for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) { 4128 CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4129 SourceLocation Loc = ReadSourceLocation(F, VTableUses, Idx); 4130 bool DefinitionRequired = VTableUses[Idx++]; 4131 SemaObj->VTableUses.push_back(std::make_pair(Class, Loc)); 4132 SemaObj->VTablesUsed[Class] = DefinitionRequired; 4133 } 4134 } 4135 4136 if (!FPPragmaOptions.empty()) { 4137 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4138 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4139 } 4140 4141 if (!OpenCLExtensions.empty()) { 4142 unsigned I = 0; 4143#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4144#include "clang/Basic/OpenCLExtensions.def" 4145 4146 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4147 } 4148} 4149 4150IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4151 // Try to find this name within our on-disk hash tables. We start with the 4152 // most recent one, since that one contains the most up-to-date info. 4153 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4154 ASTIdentifierLookupTable *IdTable 4155 = (ASTIdentifierLookupTable *)Chain[I]->IdentifierLookupTable; 4156 if (!IdTable) 4157 continue; 4158 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4159 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4160 if (Pos == IdTable->end()) 4161 continue; 4162 4163 // Dereferencing the iterator has the effect of building the 4164 // IdentifierInfo node and populating it with the various 4165 // declarations it needs. 4166 return *Pos; 4167 } 4168 return 0; 4169} 4170 4171namespace clang { 4172 /// \brief An identifier-lookup iterator that enumerates all of the 4173 /// identifiers stored within a set of AST files. 4174 class ASTIdentifierIterator : public IdentifierIterator { 4175 /// \brief The AST reader whose identifiers are being enumerated. 4176 const ASTReader &Reader; 4177 4178 /// \brief The current index into the chain of AST files stored in 4179 /// the AST reader. 4180 unsigned Index; 4181 4182 /// \brief The current position within the identifier lookup table 4183 /// of the current AST file. 4184 ASTIdentifierLookupTable::key_iterator Current; 4185 4186 /// \brief The end position within the identifier lookup table of 4187 /// the current AST file. 4188 ASTIdentifierLookupTable::key_iterator End; 4189 4190 public: 4191 explicit ASTIdentifierIterator(const ASTReader &Reader); 4192 4193 virtual llvm::StringRef Next(); 4194 }; 4195} 4196 4197ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4198 : Reader(Reader), Index(Reader.Chain.size() - 1) { 4199 ASTIdentifierLookupTable *IdTable 4200 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4201 Current = IdTable->key_begin(); 4202 End = IdTable->key_end(); 4203} 4204 4205llvm::StringRef ASTIdentifierIterator::Next() { 4206 while (Current == End) { 4207 // If we have exhausted all of our AST files, we're done. 4208 if (Index == 0) 4209 return llvm::StringRef(); 4210 4211 --Index; 4212 ASTIdentifierLookupTable *IdTable 4213 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4214 Current = IdTable->key_begin(); 4215 End = IdTable->key_end(); 4216 } 4217 4218 // We have any identifiers remaining in the current AST file; return 4219 // the next one. 4220 std::pair<const char*, unsigned> Key = *Current; 4221 ++Current; 4222 return llvm::StringRef(Key.first, Key.second); 4223} 4224 4225IdentifierIterator *ASTReader::getIdentifiers() const { 4226 return new ASTIdentifierIterator(*this); 4227} 4228 4229std::pair<ObjCMethodList, ObjCMethodList> 4230ASTReader::ReadMethodPool(Selector Sel) { 4231 // Find this selector in a hash table. We want to find the most recent entry. 4232 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4233 PerFileData &F = *Chain[I]; 4234 if (!F.SelectorLookupTable) 4235 continue; 4236 4237 ASTSelectorLookupTable *PoolTable 4238 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4239 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4240 if (Pos != PoolTable->end()) { 4241 ++NumSelectorsRead; 4242 // FIXME: Not quite happy with the statistics here. We probably should 4243 // disable this tracking when called via LoadSelector. 4244 // Also, should entries without methods count as misses? 4245 ++NumMethodPoolEntriesRead; 4246 ASTSelectorLookupTrait::data_type Data = *Pos; 4247 if (DeserializationListener) 4248 DeserializationListener->SelectorRead(Data.ID, Sel); 4249 return std::make_pair(Data.Instance, Data.Factory); 4250 } 4251 } 4252 4253 ++NumMethodPoolMisses; 4254 return std::pair<ObjCMethodList, ObjCMethodList>(); 4255} 4256 4257void ASTReader::LoadSelector(Selector Sel) { 4258 // It would be complicated to avoid reading the methods anyway. So don't. 4259 ReadMethodPool(Sel); 4260} 4261 4262void ASTReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) { 4263 assert(ID && "Non-zero identifier ID required"); 4264 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4265 IdentifiersLoaded[ID - 1] = II; 4266 if (DeserializationListener) 4267 DeserializationListener->IdentifierRead(ID, II); 4268} 4269 4270/// \brief Set the globally-visible declarations associated with the given 4271/// identifier. 4272/// 4273/// If the AST reader is currently in a state where the given declaration IDs 4274/// cannot safely be resolved, they are queued until it is safe to resolve 4275/// them. 4276/// 4277/// \param II an IdentifierInfo that refers to one or more globally-visible 4278/// declarations. 4279/// 4280/// \param DeclIDs the set of declaration IDs with the name @p II that are 4281/// visible at global scope. 4282/// 4283/// \param Nonrecursive should be true to indicate that the caller knows that 4284/// this call is non-recursive, and therefore the globally-visible declarations 4285/// will not be placed onto the pending queue. 4286void 4287ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4288 const llvm::SmallVectorImpl<uint32_t> &DeclIDs, 4289 bool Nonrecursive) { 4290 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4291 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4292 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4293 PII.II = II; 4294 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4295 return; 4296 } 4297 4298 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4299 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4300 if (SemaObj) { 4301 if (SemaObj->TUScope) { 4302 // Introduce this declaration into the translation-unit scope 4303 // and add it to the declaration chain for this identifier, so 4304 // that (unqualified) name lookup will find it. 4305 SemaObj->TUScope->AddDecl(D); 4306 } 4307 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4308 } else { 4309 // Queue this declaration so that it will be added to the 4310 // translation unit scope and identifier's declaration chain 4311 // once a Sema object is known. 4312 PreloadedDecls.push_back(D); 4313 } 4314 } 4315} 4316 4317IdentifierInfo *ASTReader::DecodeIdentifierInfo(unsigned ID) { 4318 if (ID == 0) 4319 return 0; 4320 4321 if (IdentifiersLoaded.empty()) { 4322 Error("no identifier table in AST file"); 4323 return 0; 4324 } 4325 4326 assert(PP && "Forgot to set Preprocessor ?"); 4327 ID -= 1; 4328 if (!IdentifiersLoaded[ID]) { 4329 unsigned Index = ID; 4330 const char *Str = 0; 4331 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4332 PerFileData *F = Chain[N - I - 1]; 4333 if (Index < F->LocalNumIdentifiers) { 4334 uint32_t Offset = F->IdentifierOffsets[Index]; 4335 Str = F->IdentifierTableData + Offset; 4336 break; 4337 } 4338 Index -= F->LocalNumIdentifiers; 4339 } 4340 assert(Str && "Broken Chain"); 4341 4342 // All of the strings in the AST file are preceded by a 16-bit length. 4343 // Extract that 16-bit length to avoid having to execute strlen(). 4344 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4345 // unsigned integers. This is important to avoid integer overflow when 4346 // we cast them to 'unsigned'. 4347 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4348 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4349 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4350 IdentifiersLoaded[ID] 4351 = &PP->getIdentifierTable().get(Str, StrLen); 4352 if (DeserializationListener) 4353 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4354 } 4355 4356 return IdentifiersLoaded[ID]; 4357} 4358 4359void ASTReader::ReadSLocEntry(unsigned ID) { 4360 ReadSLocEntryRecord(ID); 4361} 4362 4363Selector ASTReader::DecodeSelector(unsigned ID) { 4364 if (ID == 0) 4365 return Selector(); 4366 4367 if (ID > SelectorsLoaded.size()) { 4368 Error("selector ID out of range in AST file"); 4369 return Selector(); 4370 } 4371 4372 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4373 // Load this selector from the selector table. 4374 unsigned Idx = ID - 1; 4375 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4376 PerFileData &F = *Chain[N - I - 1]; 4377 if (Idx < F.LocalNumSelectors) { 4378 ASTSelectorLookupTrait Trait(*this); 4379 SelectorsLoaded[ID - 1] = 4380 Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0); 4381 if (DeserializationListener) 4382 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4383 break; 4384 } 4385 Idx -= F.LocalNumSelectors; 4386 } 4387 } 4388 4389 return SelectorsLoaded[ID - 1]; 4390} 4391 4392Selector ASTReader::GetExternalSelector(uint32_t ID) { 4393 return DecodeSelector(ID); 4394} 4395 4396uint32_t ASTReader::GetNumExternalSelectors() { 4397 // ID 0 (the null selector) is considered an external selector. 4398 return getTotalNumSelectors() + 1; 4399} 4400 4401DeclarationName 4402ASTReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) { 4403 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4404 switch (Kind) { 4405 case DeclarationName::Identifier: 4406 return DeclarationName(GetIdentifierInfo(Record, Idx)); 4407 4408 case DeclarationName::ObjCZeroArgSelector: 4409 case DeclarationName::ObjCOneArgSelector: 4410 case DeclarationName::ObjCMultiArgSelector: 4411 return DeclarationName(GetSelector(Record, Idx)); 4412 4413 case DeclarationName::CXXConstructorName: 4414 return Context->DeclarationNames.getCXXConstructorName( 4415 Context->getCanonicalType(GetType(Record[Idx++]))); 4416 4417 case DeclarationName::CXXDestructorName: 4418 return Context->DeclarationNames.getCXXDestructorName( 4419 Context->getCanonicalType(GetType(Record[Idx++]))); 4420 4421 case DeclarationName::CXXConversionFunctionName: 4422 return Context->DeclarationNames.getCXXConversionFunctionName( 4423 Context->getCanonicalType(GetType(Record[Idx++]))); 4424 4425 case DeclarationName::CXXOperatorName: 4426 return Context->DeclarationNames.getCXXOperatorName( 4427 (OverloadedOperatorKind)Record[Idx++]); 4428 4429 case DeclarationName::CXXLiteralOperatorName: 4430 return Context->DeclarationNames.getCXXLiteralOperatorName( 4431 GetIdentifierInfo(Record, Idx)); 4432 4433 case DeclarationName::CXXUsingDirective: 4434 return DeclarationName::getUsingDirectiveName(); 4435 } 4436 4437 // Required to silence GCC warning 4438 return DeclarationName(); 4439} 4440 4441void ASTReader::ReadDeclarationNameLoc(PerFileData &F, 4442 DeclarationNameLoc &DNLoc, 4443 DeclarationName Name, 4444 const RecordData &Record, unsigned &Idx) { 4445 switch (Name.getNameKind()) { 4446 case DeclarationName::CXXConstructorName: 4447 case DeclarationName::CXXDestructorName: 4448 case DeclarationName::CXXConversionFunctionName: 4449 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4450 break; 4451 4452 case DeclarationName::CXXOperatorName: 4453 DNLoc.CXXOperatorName.BeginOpNameLoc 4454 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4455 DNLoc.CXXOperatorName.EndOpNameLoc 4456 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4457 break; 4458 4459 case DeclarationName::CXXLiteralOperatorName: 4460 DNLoc.CXXLiteralOperatorName.OpNameLoc 4461 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4462 break; 4463 4464 case DeclarationName::Identifier: 4465 case DeclarationName::ObjCZeroArgSelector: 4466 case DeclarationName::ObjCOneArgSelector: 4467 case DeclarationName::ObjCMultiArgSelector: 4468 case DeclarationName::CXXUsingDirective: 4469 break; 4470 } 4471} 4472 4473void ASTReader::ReadDeclarationNameInfo(PerFileData &F, 4474 DeclarationNameInfo &NameInfo, 4475 const RecordData &Record, unsigned &Idx) { 4476 NameInfo.setName(ReadDeclarationName(Record, Idx)); 4477 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4478 DeclarationNameLoc DNLoc; 4479 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4480 NameInfo.setInfo(DNLoc); 4481} 4482 4483void ASTReader::ReadQualifierInfo(PerFileData &F, QualifierInfo &Info, 4484 const RecordData &Record, unsigned &Idx) { 4485 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4486 unsigned NumTPLists = Record[Idx++]; 4487 Info.NumTemplParamLists = NumTPLists; 4488 if (NumTPLists) { 4489 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 4490 for (unsigned i=0; i != NumTPLists; ++i) 4491 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4492 } 4493} 4494 4495TemplateName 4496ASTReader::ReadTemplateName(PerFileData &F, const RecordData &Record, 4497 unsigned &Idx) { 4498 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 4499 switch (Kind) { 4500 case TemplateName::Template: 4501 return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++]))); 4502 4503 case TemplateName::OverloadedTemplate: { 4504 unsigned size = Record[Idx++]; 4505 UnresolvedSet<8> Decls; 4506 while (size--) 4507 Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4508 4509 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 4510 } 4511 4512 case TemplateName::QualifiedTemplate: { 4513 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4514 bool hasTemplKeyword = Record[Idx++]; 4515 TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++])); 4516 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 4517 } 4518 4519 case TemplateName::DependentTemplate: { 4520 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4521 if (Record[Idx++]) // isIdentifier 4522 return Context->getDependentTemplateName(NNS, 4523 GetIdentifierInfo(Record, Idx)); 4524 return Context->getDependentTemplateName(NNS, 4525 (OverloadedOperatorKind)Record[Idx++]); 4526 } 4527 4528 case TemplateName::SubstTemplateTemplateParmPack: { 4529 TemplateTemplateParmDecl *Param 4530 = cast_or_null<TemplateTemplateParmDecl>(GetDecl(Record[Idx++])); 4531 if (!Param) 4532 return TemplateName(); 4533 4534 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 4535 if (ArgPack.getKind() != TemplateArgument::Pack) 4536 return TemplateName(); 4537 4538 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 4539 } 4540 } 4541 4542 assert(0 && "Unhandled template name kind!"); 4543 return TemplateName(); 4544} 4545 4546TemplateArgument 4547ASTReader::ReadTemplateArgument(PerFileData &F, 4548 const RecordData &Record, unsigned &Idx) { 4549 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 4550 switch (Kind) { 4551 case TemplateArgument::Null: 4552 return TemplateArgument(); 4553 case TemplateArgument::Type: 4554 return TemplateArgument(GetType(Record[Idx++])); 4555 case TemplateArgument::Declaration: 4556 return TemplateArgument(GetDecl(Record[Idx++])); 4557 case TemplateArgument::Integral: { 4558 llvm::APSInt Value = ReadAPSInt(Record, Idx); 4559 QualType T = GetType(Record[Idx++]); 4560 return TemplateArgument(Value, T); 4561 } 4562 case TemplateArgument::Template: 4563 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 4564 case TemplateArgument::TemplateExpansion: { 4565 TemplateName Name = ReadTemplateName(F, Record, Idx); 4566 llvm::Optional<unsigned> NumTemplateExpansions; 4567 if (unsigned NumExpansions = Record[Idx++]) 4568 NumTemplateExpansions = NumExpansions - 1; 4569 return TemplateArgument(Name, NumTemplateExpansions); 4570 } 4571 case TemplateArgument::Expression: 4572 return TemplateArgument(ReadExpr(F)); 4573 case TemplateArgument::Pack: { 4574 unsigned NumArgs = Record[Idx++]; 4575 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 4576 for (unsigned I = 0; I != NumArgs; ++I) 4577 Args[I] = ReadTemplateArgument(F, Record, Idx); 4578 return TemplateArgument(Args, NumArgs); 4579 } 4580 } 4581 4582 assert(0 && "Unhandled template argument kind!"); 4583 return TemplateArgument(); 4584} 4585 4586TemplateParameterList * 4587ASTReader::ReadTemplateParameterList(PerFileData &F, 4588 const RecordData &Record, unsigned &Idx) { 4589 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 4590 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 4591 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 4592 4593 unsigned NumParams = Record[Idx++]; 4594 llvm::SmallVector<NamedDecl *, 16> Params; 4595 Params.reserve(NumParams); 4596 while (NumParams--) 4597 Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4598 4599 TemplateParameterList* TemplateParams = 4600 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 4601 Params.data(), Params.size(), RAngleLoc); 4602 return TemplateParams; 4603} 4604 4605void 4606ASTReader:: 4607ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, 4608 PerFileData &F, const RecordData &Record, 4609 unsigned &Idx) { 4610 unsigned NumTemplateArgs = Record[Idx++]; 4611 TemplArgs.reserve(NumTemplateArgs); 4612 while (NumTemplateArgs--) 4613 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 4614} 4615 4616/// \brief Read a UnresolvedSet structure. 4617void ASTReader::ReadUnresolvedSet(UnresolvedSetImpl &Set, 4618 const RecordData &Record, unsigned &Idx) { 4619 unsigned NumDecls = Record[Idx++]; 4620 while (NumDecls--) { 4621 NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++])); 4622 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 4623 Set.addDecl(D, AS); 4624 } 4625} 4626 4627CXXBaseSpecifier 4628ASTReader::ReadCXXBaseSpecifier(PerFileData &F, 4629 const RecordData &Record, unsigned &Idx) { 4630 bool isVirtual = static_cast<bool>(Record[Idx++]); 4631 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 4632 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 4633 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 4634 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 4635 SourceRange Range = ReadSourceRange(F, Record, Idx); 4636 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 4637 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 4638 EllipsisLoc); 4639 Result.setInheritConstructors(inheritConstructors); 4640 return Result; 4641} 4642 4643std::pair<CXXCtorInitializer **, unsigned> 4644ASTReader::ReadCXXCtorInitializers(PerFileData &F, const RecordData &Record, 4645 unsigned &Idx) { 4646 CXXCtorInitializer **CtorInitializers = 0; 4647 unsigned NumInitializers = Record[Idx++]; 4648 if (NumInitializers) { 4649 ASTContext &C = *getContext(); 4650 4651 CtorInitializers 4652 = new (C) CXXCtorInitializer*[NumInitializers]; 4653 for (unsigned i=0; i != NumInitializers; ++i) { 4654 TypeSourceInfo *BaseClassInfo = 0; 4655 bool IsBaseVirtual = false; 4656 FieldDecl *Member = 0; 4657 IndirectFieldDecl *IndirectMember = 0; 4658 4659 bool IsBaseInitializer = Record[Idx++]; 4660 if (IsBaseInitializer) { 4661 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 4662 IsBaseVirtual = Record[Idx++]; 4663 } else { 4664 bool IsIndirectMemberInitializer = Record[Idx++]; 4665 if (IsIndirectMemberInitializer) 4666 IndirectMember = cast<IndirectFieldDecl>(GetDecl(Record[Idx++])); 4667 else 4668 Member = cast<FieldDecl>(GetDecl(Record[Idx++])); 4669 } 4670 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 4671 Expr *Init = ReadExpr(F); 4672 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 4673 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 4674 bool IsWritten = Record[Idx++]; 4675 unsigned SourceOrderOrNumArrayIndices; 4676 llvm::SmallVector<VarDecl *, 8> Indices; 4677 if (IsWritten) { 4678 SourceOrderOrNumArrayIndices = Record[Idx++]; 4679 } else { 4680 SourceOrderOrNumArrayIndices = Record[Idx++]; 4681 Indices.reserve(SourceOrderOrNumArrayIndices); 4682 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 4683 Indices.push_back(cast<VarDecl>(GetDecl(Record[Idx++]))); 4684 } 4685 4686 CXXCtorInitializer *BOMInit; 4687 if (IsBaseInitializer) { 4688 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 4689 LParenLoc, Init, RParenLoc, 4690 MemberOrEllipsisLoc); 4691 } else if (IsWritten) { 4692 if (Member) 4693 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 4694 LParenLoc, Init, RParenLoc); 4695 else 4696 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 4697 MemberOrEllipsisLoc, LParenLoc, 4698 Init, RParenLoc); 4699 } else { 4700 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 4701 LParenLoc, Init, RParenLoc, 4702 Indices.data(), Indices.size()); 4703 } 4704 4705 if (IsWritten) 4706 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 4707 CtorInitializers[i] = BOMInit; 4708 } 4709 } 4710 4711 return std::make_pair(CtorInitializers, NumInitializers); 4712} 4713 4714NestedNameSpecifier * 4715ASTReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) { 4716 unsigned N = Record[Idx++]; 4717 NestedNameSpecifier *NNS = 0, *Prev = 0; 4718 for (unsigned I = 0; I != N; ++I) { 4719 NestedNameSpecifier::SpecifierKind Kind 4720 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4721 switch (Kind) { 4722 case NestedNameSpecifier::Identifier: { 4723 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4724 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 4725 break; 4726 } 4727 4728 case NestedNameSpecifier::Namespace: { 4729 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4730 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 4731 break; 4732 } 4733 4734 case NestedNameSpecifier::NamespaceAlias: { 4735 NamespaceAliasDecl *Alias 4736 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4737 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 4738 break; 4739 } 4740 4741 case NestedNameSpecifier::TypeSpec: 4742 case NestedNameSpecifier::TypeSpecWithTemplate: { 4743 const Type *T = GetType(Record[Idx++]).getTypePtrOrNull(); 4744 if (!T) 4745 return 0; 4746 4747 bool Template = Record[Idx++]; 4748 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 4749 break; 4750 } 4751 4752 case NestedNameSpecifier::Global: { 4753 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 4754 // No associated value, and there can't be a prefix. 4755 break; 4756 } 4757 } 4758 Prev = NNS; 4759 } 4760 return NNS; 4761} 4762 4763NestedNameSpecifierLoc 4764ASTReader::ReadNestedNameSpecifierLoc(PerFileData &F, const RecordData &Record, 4765 unsigned &Idx) { 4766 unsigned N = Record[Idx++]; 4767 NestedNameSpecifierLocBuilder Builder; 4768 for (unsigned I = 0; I != N; ++I) { 4769 NestedNameSpecifier::SpecifierKind Kind 4770 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4771 switch (Kind) { 4772 case NestedNameSpecifier::Identifier: { 4773 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4774 SourceRange Range = ReadSourceRange(F, Record, Idx); 4775 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 4776 break; 4777 } 4778 4779 case NestedNameSpecifier::Namespace: { 4780 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4781 SourceRange Range = ReadSourceRange(F, Record, Idx); 4782 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 4783 break; 4784 } 4785 4786 case NestedNameSpecifier::NamespaceAlias: { 4787 NamespaceAliasDecl *Alias 4788 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4789 SourceRange Range = ReadSourceRange(F, Record, Idx); 4790 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 4791 break; 4792 } 4793 4794 case NestedNameSpecifier::TypeSpec: 4795 case NestedNameSpecifier::TypeSpecWithTemplate: { 4796 bool Template = Record[Idx++]; 4797 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 4798 if (!T) 4799 return NestedNameSpecifierLoc(); 4800 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4801 4802 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 4803 Builder.Extend(*Context, 4804 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 4805 T->getTypeLoc(), ColonColonLoc); 4806 break; 4807 } 4808 4809 case NestedNameSpecifier::Global: { 4810 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4811 Builder.MakeGlobal(*Context, ColonColonLoc); 4812 break; 4813 } 4814 } 4815 } 4816 4817 return Builder.getWithLocInContext(*Context); 4818} 4819 4820SourceRange 4821ASTReader::ReadSourceRange(PerFileData &F, const RecordData &Record, 4822 unsigned &Idx) { 4823 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 4824 SourceLocation end = ReadSourceLocation(F, Record, Idx); 4825 return SourceRange(beg, end); 4826} 4827 4828/// \brief Read an integral value 4829llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 4830 unsigned BitWidth = Record[Idx++]; 4831 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 4832 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 4833 Idx += NumWords; 4834 return Result; 4835} 4836 4837/// \brief Read a signed integral value 4838llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 4839 bool isUnsigned = Record[Idx++]; 4840 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 4841} 4842 4843/// \brief Read a floating-point value 4844llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 4845 return llvm::APFloat(ReadAPInt(Record, Idx)); 4846} 4847 4848// \brief Read a string 4849std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 4850 unsigned Len = Record[Idx++]; 4851 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 4852 Idx += Len; 4853 return Result; 4854} 4855 4856CXXTemporary *ASTReader::ReadCXXTemporary(const RecordData &Record, 4857 unsigned &Idx) { 4858 CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++])); 4859 return CXXTemporary::Create(*Context, Decl); 4860} 4861 4862DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 4863 return Diag(SourceLocation(), DiagID); 4864} 4865 4866DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 4867 return Diags.Report(Loc, DiagID); 4868} 4869 4870/// \brief Retrieve the identifier table associated with the 4871/// preprocessor. 4872IdentifierTable &ASTReader::getIdentifierTable() { 4873 assert(PP && "Forgot to set Preprocessor ?"); 4874 return PP->getIdentifierTable(); 4875} 4876 4877/// \brief Record that the given ID maps to the given switch-case 4878/// statement. 4879void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 4880 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 4881 SwitchCaseStmts[ID] = SC; 4882} 4883 4884/// \brief Retrieve the switch-case statement with the given ID. 4885SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 4886 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 4887 return SwitchCaseStmts[ID]; 4888} 4889 4890void ASTReader::ClearSwitchCaseIDs() { 4891 SwitchCaseStmts.clear(); 4892} 4893 4894void ASTReader::FinishedDeserializing() { 4895 assert(NumCurrentElementsDeserializing && 4896 "FinishedDeserializing not paired with StartedDeserializing"); 4897 if (NumCurrentElementsDeserializing == 1) { 4898 // If any identifiers with corresponding top-level declarations have 4899 // been loaded, load those declarations now. 4900 while (!PendingIdentifierInfos.empty()) { 4901 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 4902 PendingIdentifierInfos.front().DeclIDs, true); 4903 PendingIdentifierInfos.pop_front(); 4904 } 4905 4906 // Ready to load previous declarations of Decls that were delayed. 4907 while (!PendingPreviousDecls.empty()) { 4908 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 4909 PendingPreviousDecls.front().second); 4910 PendingPreviousDecls.pop_front(); 4911 } 4912 4913 // We are not in recursive loading, so it's safe to pass the "interesting" 4914 // decls to the consumer. 4915 if (Consumer) 4916 PassInterestingDeclsToConsumer(); 4917 4918 assert(PendingForwardRefs.size() == 0 && 4919 "Some forward refs did not get linked to the definition!"); 4920 } 4921 --NumCurrentElementsDeserializing; 4922} 4923 4924ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 4925 const char *isysroot, bool DisableValidation, 4926 bool DisableStatCache) 4927 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 4928 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 4929 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 4930 Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation), 4931 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4932 NumSLocEntriesRead(0), TotalNumSLocEntries(0), NextSLocOffset(0), 4933 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 4934 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 4935 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 4936 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 4937 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 4938 NumCurrentElementsDeserializing(0) 4939{ 4940 RelocatablePCH = false; 4941} 4942 4943ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 4944 Diagnostic &Diags, const char *isysroot, 4945 bool DisableValidation, bool DisableStatCache) 4946 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 4947 Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0), 4948 isysroot(isysroot), DisableValidation(DisableValidation), 4949 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4950 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 4951 NextSLocOffset(0), NumStatementsRead(0), TotalNumStatements(0), 4952 NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0), 4953 NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 4954 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 4955 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 4956 TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) { 4957 RelocatablePCH = false; 4958} 4959 4960ASTReader::~ASTReader() { 4961 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 4962 delete Chain[e - i - 1]; 4963 // Delete all visible decl lookup tables 4964 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 4965 E = DeclContextOffsets.end(); 4966 I != E; ++I) { 4967 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 4968 J != F; ++J) { 4969 if (J->NameLookupTableData) 4970 delete static_cast<ASTDeclContextNameLookupTable*>( 4971 J->NameLookupTableData); 4972 } 4973 } 4974 for (DeclContextVisibleUpdatesPending::iterator 4975 I = PendingVisibleUpdates.begin(), 4976 E = PendingVisibleUpdates.end(); 4977 I != E; ++I) { 4978 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 4979 F = I->second.end(); 4980 J != F; ++J) 4981 delete static_cast<ASTDeclContextNameLookupTable*>(*J); 4982 } 4983} 4984 4985ASTReader::PerFileData::PerFileData(ASTFileType Ty) 4986 : Type(Ty), SizeInBits(0), LocalNumSLocEntries(0), SLocOffsets(0), LocalSLocSize(0), 4987 LocalNumIdentifiers(0), IdentifierOffsets(0), IdentifierTableData(0), 4988 IdentifierLookupTable(0), LocalNumMacroDefinitions(0), 4989 MacroDefinitionOffsets(0), 4990 LocalNumHeaderFileInfos(0), HeaderFileInfoTableData(0), 4991 HeaderFileInfoTable(0), 4992 LocalNumSelectors(0), SelectorOffsets(0), 4993 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 4994 DeclOffsets(0), LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 4995 LocalNumTypes(0), TypeOffsets(0), StatCache(0), 4996 NumPreallocatedPreprocessingEntities(0), NextInSource(0) 4997{} 4998 4999ASTReader::PerFileData::~PerFileData() { 5000 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5001 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5002 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5003} 5004