ASTReader.cpp revision 94fdffa4a572fc14ac296f5f1aae9db3734c72f1
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 PARSE_LANGOPT(MRTD); 2843 #undef PARSE_LANGOPT 2844 2845 return Listener->ReadLanguageOptions(LangOpts); 2846 } 2847 2848 return false; 2849} 2850 2851void ASTReader::ReadPreprocessedEntities() { 2852 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2853 PerFileData &F = *Chain[I]; 2854 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 2855 continue; 2856 2857 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 2858 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 2859 while (LoadPreprocessedEntity(F)) { } 2860 } 2861} 2862 2863PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 2864 PerFileData *F = 0; 2865 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2866 if (Offset < Chain[I]->SizeInBits) { 2867 F = Chain[I]; 2868 break; 2869 } 2870 2871 Offset -= Chain[I]->SizeInBits; 2872 } 2873 2874 if (!F) { 2875 Error("Malformed preprocessed entity offset"); 2876 return 0; 2877 } 2878 2879 // Keep track of where we are in the stream, then jump back there 2880 // after reading this entity. 2881 SavedStreamPosition SavedPosition(F->PreprocessorDetailCursor); 2882 F->PreprocessorDetailCursor.JumpToBit(Offset); 2883 return LoadPreprocessedEntity(*F); 2884} 2885 2886HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 2887 HeaderFileInfoTrait Trait(FE->getName()); 2888 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2889 PerFileData &F = *Chain[I]; 2890 HeaderFileInfoLookupTable *Table 2891 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 2892 if (!Table) 2893 continue; 2894 2895 // Look in the on-disk hash table for an entry for this file name. 2896 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 2897 &Trait); 2898 if (Pos == Table->end()) 2899 continue; 2900 2901 HeaderFileInfo HFI = *Pos; 2902 if (Listener) 2903 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 2904 2905 return HFI; 2906 } 2907 2908 return HeaderFileInfo(); 2909} 2910 2911void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 2912 unsigned Idx = 0; 2913 while (Idx < PragmaDiagMappings.size()) { 2914 SourceLocation 2915 Loc = SourceLocation::getFromRawEncoding(PragmaDiagMappings[Idx++]); 2916 while (1) { 2917 assert(Idx < PragmaDiagMappings.size() && 2918 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 2919 if (Idx >= PragmaDiagMappings.size()) 2920 break; // Something is messed up but at least avoid infinite loop in 2921 // release build. 2922 unsigned DiagID = PragmaDiagMappings[Idx++]; 2923 if (DiagID == (unsigned)-1) 2924 break; // no more diag/map pairs for this location. 2925 diag::Mapping Map = (diag::Mapping)PragmaDiagMappings[Idx++]; 2926 Diag.setDiagnosticMapping(DiagID, Map, Loc); 2927 } 2928 } 2929} 2930 2931/// \brief Get the correct cursor and offset for loading a type. 2932ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 2933 PerFileData *F = 0; 2934 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2935 F = Chain[N - I - 1]; 2936 if (Index < F->LocalNumTypes) 2937 break; 2938 Index -= F->LocalNumTypes; 2939 } 2940 assert(F && F->LocalNumTypes > Index && "Broken chain"); 2941 return RecordLocation(F, F->TypeOffsets[Index]); 2942} 2943 2944/// \brief Read and return the type with the given index.. 2945/// 2946/// The index is the type ID, shifted and minus the number of predefs. This 2947/// routine actually reads the record corresponding to the type at the given 2948/// location. It is a helper routine for GetType, which deals with reading type 2949/// IDs. 2950QualType ASTReader::ReadTypeRecord(unsigned Index) { 2951 RecordLocation Loc = TypeCursorForIndex(Index); 2952 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 2953 2954 // Keep track of where we are in the stream, then jump back there 2955 // after reading this type. 2956 SavedStreamPosition SavedPosition(DeclsCursor); 2957 2958 ReadingKindTracker ReadingKind(Read_Type, *this); 2959 2960 // Note that we are loading a type record. 2961 Deserializing AType(this); 2962 2963 DeclsCursor.JumpToBit(Loc.Offset); 2964 RecordData Record; 2965 unsigned Code = DeclsCursor.ReadCode(); 2966 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 2967 case TYPE_EXT_QUAL: { 2968 if (Record.size() != 2) { 2969 Error("Incorrect encoding of extended qualifier type"); 2970 return QualType(); 2971 } 2972 QualType Base = GetType(Record[0]); 2973 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]); 2974 return Context->getQualifiedType(Base, Quals); 2975 } 2976 2977 case TYPE_COMPLEX: { 2978 if (Record.size() != 1) { 2979 Error("Incorrect encoding of complex type"); 2980 return QualType(); 2981 } 2982 QualType ElemType = GetType(Record[0]); 2983 return Context->getComplexType(ElemType); 2984 } 2985 2986 case TYPE_POINTER: { 2987 if (Record.size() != 1) { 2988 Error("Incorrect encoding of pointer type"); 2989 return QualType(); 2990 } 2991 QualType PointeeType = GetType(Record[0]); 2992 return Context->getPointerType(PointeeType); 2993 } 2994 2995 case TYPE_BLOCK_POINTER: { 2996 if (Record.size() != 1) { 2997 Error("Incorrect encoding of block pointer type"); 2998 return QualType(); 2999 } 3000 QualType PointeeType = GetType(Record[0]); 3001 return Context->getBlockPointerType(PointeeType); 3002 } 3003 3004 case TYPE_LVALUE_REFERENCE: { 3005 if (Record.size() != 1) { 3006 Error("Incorrect encoding of lvalue reference type"); 3007 return QualType(); 3008 } 3009 QualType PointeeType = GetType(Record[0]); 3010 return Context->getLValueReferenceType(PointeeType); 3011 } 3012 3013 case TYPE_RVALUE_REFERENCE: { 3014 if (Record.size() != 1) { 3015 Error("Incorrect encoding of rvalue reference type"); 3016 return QualType(); 3017 } 3018 QualType PointeeType = GetType(Record[0]); 3019 return Context->getRValueReferenceType(PointeeType); 3020 } 3021 3022 case TYPE_MEMBER_POINTER: { 3023 if (Record.size() != 2) { 3024 Error("Incorrect encoding of member pointer type"); 3025 return QualType(); 3026 } 3027 QualType PointeeType = GetType(Record[0]); 3028 QualType ClassType = GetType(Record[1]); 3029 if (PointeeType.isNull() || ClassType.isNull()) 3030 return QualType(); 3031 3032 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3033 } 3034 3035 case TYPE_CONSTANT_ARRAY: { 3036 QualType ElementType = GetType(Record[0]); 3037 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3038 unsigned IndexTypeQuals = Record[2]; 3039 unsigned Idx = 3; 3040 llvm::APInt Size = ReadAPInt(Record, Idx); 3041 return Context->getConstantArrayType(ElementType, Size, 3042 ASM, IndexTypeQuals); 3043 } 3044 3045 case TYPE_INCOMPLETE_ARRAY: { 3046 QualType ElementType = GetType(Record[0]); 3047 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3048 unsigned IndexTypeQuals = Record[2]; 3049 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3050 } 3051 3052 case TYPE_VARIABLE_ARRAY: { 3053 QualType ElementType = GetType(Record[0]); 3054 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3055 unsigned IndexTypeQuals = Record[2]; 3056 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3057 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3058 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3059 ASM, IndexTypeQuals, 3060 SourceRange(LBLoc, RBLoc)); 3061 } 3062 3063 case TYPE_VECTOR: { 3064 if (Record.size() != 3) { 3065 Error("incorrect encoding of vector type in AST file"); 3066 return QualType(); 3067 } 3068 3069 QualType ElementType = GetType(Record[0]); 3070 unsigned NumElements = Record[1]; 3071 unsigned VecKind = Record[2]; 3072 return Context->getVectorType(ElementType, NumElements, 3073 (VectorType::VectorKind)VecKind); 3074 } 3075 3076 case TYPE_EXT_VECTOR: { 3077 if (Record.size() != 3) { 3078 Error("incorrect encoding of extended vector type in AST file"); 3079 return QualType(); 3080 } 3081 3082 QualType ElementType = GetType(Record[0]); 3083 unsigned NumElements = Record[1]; 3084 return Context->getExtVectorType(ElementType, NumElements); 3085 } 3086 3087 case TYPE_FUNCTION_NO_PROTO: { 3088 if (Record.size() != 4) { 3089 Error("incorrect encoding of no-proto function type"); 3090 return QualType(); 3091 } 3092 QualType ResultType = GetType(Record[0]); 3093 FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]); 3094 return Context->getFunctionNoProtoType(ResultType, Info); 3095 } 3096 3097 case TYPE_FUNCTION_PROTO: { 3098 QualType ResultType = GetType(Record[0]); 3099 3100 FunctionProtoType::ExtProtoInfo EPI; 3101 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3102 /*regparm*/ Record[2], 3103 static_cast<CallingConv>(Record[3])); 3104 3105 unsigned Idx = 4; 3106 unsigned NumParams = Record[Idx++]; 3107 llvm::SmallVector<QualType, 16> ParamTypes; 3108 for (unsigned I = 0; I != NumParams; ++I) 3109 ParamTypes.push_back(GetType(Record[Idx++])); 3110 3111 EPI.Variadic = Record[Idx++]; 3112 EPI.TypeQuals = Record[Idx++]; 3113 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3114 EPI.HasExceptionSpec = Record[Idx++]; 3115 EPI.HasAnyExceptionSpec = Record[Idx++]; 3116 EPI.NumExceptions = Record[Idx++]; 3117 llvm::SmallVector<QualType, 2> Exceptions; 3118 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3119 Exceptions.push_back(GetType(Record[Idx++])); 3120 EPI.Exceptions = Exceptions.data(); 3121 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3122 EPI); 3123 } 3124 3125 case TYPE_UNRESOLVED_USING: 3126 return Context->getTypeDeclType( 3127 cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0]))); 3128 3129 case TYPE_TYPEDEF: { 3130 if (Record.size() != 2) { 3131 Error("incorrect encoding of typedef type"); 3132 return QualType(); 3133 } 3134 TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0])); 3135 QualType Canonical = GetType(Record[1]); 3136 if (!Canonical.isNull()) 3137 Canonical = Context->getCanonicalType(Canonical); 3138 return Context->getTypedefType(Decl, Canonical); 3139 } 3140 3141 case TYPE_TYPEOF_EXPR: 3142 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3143 3144 case TYPE_TYPEOF: { 3145 if (Record.size() != 1) { 3146 Error("incorrect encoding of typeof(type) in AST file"); 3147 return QualType(); 3148 } 3149 QualType UnderlyingType = GetType(Record[0]); 3150 return Context->getTypeOfType(UnderlyingType); 3151 } 3152 3153 case TYPE_DECLTYPE: 3154 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3155 3156 case TYPE_AUTO: 3157 return Context->getAutoType(GetType(Record[0])); 3158 3159 case TYPE_RECORD: { 3160 if (Record.size() != 2) { 3161 Error("incorrect encoding of record type"); 3162 return QualType(); 3163 } 3164 bool IsDependent = Record[0]; 3165 QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1]))); 3166 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3167 return T; 3168 } 3169 3170 case TYPE_ENUM: { 3171 if (Record.size() != 2) { 3172 Error("incorrect encoding of enum type"); 3173 return QualType(); 3174 } 3175 bool IsDependent = Record[0]; 3176 QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1]))); 3177 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3178 return T; 3179 } 3180 3181 case TYPE_ATTRIBUTED: { 3182 if (Record.size() != 3) { 3183 Error("incorrect encoding of attributed type"); 3184 return QualType(); 3185 } 3186 QualType modifiedType = GetType(Record[0]); 3187 QualType equivalentType = GetType(Record[1]); 3188 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3189 return Context->getAttributedType(kind, modifiedType, equivalentType); 3190 } 3191 3192 case TYPE_PAREN: { 3193 if (Record.size() != 1) { 3194 Error("incorrect encoding of paren type"); 3195 return QualType(); 3196 } 3197 QualType InnerType = GetType(Record[0]); 3198 return Context->getParenType(InnerType); 3199 } 3200 3201 case TYPE_PACK_EXPANSION: { 3202 if (Record.size() != 2) { 3203 Error("incorrect encoding of pack expansion type"); 3204 return QualType(); 3205 } 3206 QualType Pattern = GetType(Record[0]); 3207 if (Pattern.isNull()) 3208 return QualType(); 3209 llvm::Optional<unsigned> NumExpansions; 3210 if (Record[1]) 3211 NumExpansions = Record[1] - 1; 3212 return Context->getPackExpansionType(Pattern, NumExpansions); 3213 } 3214 3215 case TYPE_ELABORATED: { 3216 unsigned Idx = 0; 3217 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3218 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3219 QualType NamedType = GetType(Record[Idx++]); 3220 return Context->getElaboratedType(Keyword, NNS, NamedType); 3221 } 3222 3223 case TYPE_OBJC_INTERFACE: { 3224 unsigned Idx = 0; 3225 ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++])); 3226 return Context->getObjCInterfaceType(ItfD); 3227 } 3228 3229 case TYPE_OBJC_OBJECT: { 3230 unsigned Idx = 0; 3231 QualType Base = GetType(Record[Idx++]); 3232 unsigned NumProtos = Record[Idx++]; 3233 llvm::SmallVector<ObjCProtocolDecl*, 4> Protos; 3234 for (unsigned I = 0; I != NumProtos; ++I) 3235 Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++]))); 3236 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3237 } 3238 3239 case TYPE_OBJC_OBJECT_POINTER: { 3240 unsigned Idx = 0; 3241 QualType Pointee = GetType(Record[Idx++]); 3242 return Context->getObjCObjectPointerType(Pointee); 3243 } 3244 3245 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3246 unsigned Idx = 0; 3247 QualType Parm = GetType(Record[Idx++]); 3248 QualType Replacement = GetType(Record[Idx++]); 3249 return 3250 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3251 Replacement); 3252 } 3253 3254 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3255 unsigned Idx = 0; 3256 QualType Parm = GetType(Record[Idx++]); 3257 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3258 return Context->getSubstTemplateTypeParmPackType( 3259 cast<TemplateTypeParmType>(Parm), 3260 ArgPack); 3261 } 3262 3263 case TYPE_INJECTED_CLASS_NAME: { 3264 CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0])); 3265 QualType TST = GetType(Record[1]); // probably derivable 3266 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3267 // for AST reading, too much interdependencies. 3268 return 3269 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3270 } 3271 3272 case TYPE_TEMPLATE_TYPE_PARM: { 3273 unsigned Idx = 0; 3274 unsigned Depth = Record[Idx++]; 3275 unsigned Index = Record[Idx++]; 3276 bool Pack = Record[Idx++]; 3277 IdentifierInfo *Name = GetIdentifierInfo(Record, Idx); 3278 return Context->getTemplateTypeParmType(Depth, Index, Pack, Name); 3279 } 3280 3281 case TYPE_DEPENDENT_NAME: { 3282 unsigned Idx = 0; 3283 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3284 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3285 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3286 QualType Canon = GetType(Record[Idx++]); 3287 if (!Canon.isNull()) 3288 Canon = Context->getCanonicalType(Canon); 3289 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3290 } 3291 3292 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3293 unsigned Idx = 0; 3294 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3295 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3296 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3297 unsigned NumArgs = Record[Idx++]; 3298 llvm::SmallVector<TemplateArgument, 8> Args; 3299 Args.reserve(NumArgs); 3300 while (NumArgs--) 3301 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3302 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3303 Args.size(), Args.data()); 3304 } 3305 3306 case TYPE_DEPENDENT_SIZED_ARRAY: { 3307 unsigned Idx = 0; 3308 3309 // ArrayType 3310 QualType ElementType = GetType(Record[Idx++]); 3311 ArrayType::ArraySizeModifier ASM 3312 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3313 unsigned IndexTypeQuals = Record[Idx++]; 3314 3315 // DependentSizedArrayType 3316 Expr *NumElts = ReadExpr(*Loc.F); 3317 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3318 3319 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3320 IndexTypeQuals, Brackets); 3321 } 3322 3323 case TYPE_TEMPLATE_SPECIALIZATION: { 3324 unsigned Idx = 0; 3325 bool IsDependent = Record[Idx++]; 3326 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3327 llvm::SmallVector<TemplateArgument, 8> Args; 3328 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3329 QualType Canon = GetType(Record[Idx++]); 3330 QualType T; 3331 if (Canon.isNull()) 3332 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3333 Args.size()); 3334 else 3335 T = Context->getTemplateSpecializationType(Name, Args.data(), 3336 Args.size(), Canon); 3337 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3338 return T; 3339 } 3340 } 3341 // Suppress a GCC warning 3342 return QualType(); 3343} 3344 3345class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3346 ASTReader &Reader; 3347 ASTReader::PerFileData &F; 3348 llvm::BitstreamCursor &DeclsCursor; 3349 const ASTReader::RecordData &Record; 3350 unsigned &Idx; 3351 3352 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3353 unsigned &I) { 3354 return Reader.ReadSourceLocation(F, R, I); 3355 } 3356 3357public: 3358 TypeLocReader(ASTReader &Reader, ASTReader::PerFileData &F, 3359 const ASTReader::RecordData &Record, unsigned &Idx) 3360 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3361 { } 3362 3363 // We want compile-time assurance that we've enumerated all of 3364 // these, so unfortunately we have to declare them first, then 3365 // define them out-of-line. 3366#define ABSTRACT_TYPELOC(CLASS, PARENT) 3367#define TYPELOC(CLASS, PARENT) \ 3368 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3369#include "clang/AST/TypeLocNodes.def" 3370 3371 void VisitFunctionTypeLoc(FunctionTypeLoc); 3372 void VisitArrayTypeLoc(ArrayTypeLoc); 3373}; 3374 3375void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3376 // nothing to do 3377} 3378void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3379 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3380 if (TL.needsExtraLocalData()) { 3381 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3382 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3383 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3384 TL.setModeAttr(Record[Idx++]); 3385 } 3386} 3387void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3388 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3389} 3390void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3391 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3392} 3393void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3394 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3395} 3396void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3397 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3398} 3399void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3400 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3401} 3402void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3403 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3404} 3405void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3406 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3407 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3408 if (Record[Idx++]) 3409 TL.setSizeExpr(Reader.ReadExpr(F)); 3410 else 3411 TL.setSizeExpr(0); 3412} 3413void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3414 VisitArrayTypeLoc(TL); 3415} 3416void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3417 VisitArrayTypeLoc(TL); 3418} 3419void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3420 VisitArrayTypeLoc(TL); 3421} 3422void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3423 DependentSizedArrayTypeLoc TL) { 3424 VisitArrayTypeLoc(TL); 3425} 3426void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3427 DependentSizedExtVectorTypeLoc TL) { 3428 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3429} 3430void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3431 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3432} 3433void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3434 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3435} 3436void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3437 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3438 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3439 TL.setTrailingReturn(Record[Idx++]); 3440 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3441 TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++]))); 3442 } 3443} 3444void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3445 VisitFunctionTypeLoc(TL); 3446} 3447void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3448 VisitFunctionTypeLoc(TL); 3449} 3450void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3451 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3452} 3453void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3454 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3455} 3456void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3457 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3458 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3459 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3460} 3461void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3462 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3463 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3464 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3465 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3466} 3467void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3468 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3469} 3470void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3471 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3472} 3473void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3474 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3475} 3476void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3477 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3478} 3479void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3480 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3481 if (TL.hasAttrOperand()) { 3482 SourceRange range; 3483 range.setBegin(ReadSourceLocation(Record, Idx)); 3484 range.setEnd(ReadSourceLocation(Record, Idx)); 3485 TL.setAttrOperandParensRange(range); 3486 } 3487 if (TL.hasAttrExprOperand()) { 3488 if (Record[Idx++]) 3489 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3490 else 3491 TL.setAttrExprOperand(0); 3492 } else if (TL.hasAttrEnumOperand()) 3493 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3494} 3495void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3496 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3497} 3498void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3499 SubstTemplateTypeParmTypeLoc TL) { 3500 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3501} 3502void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3503 SubstTemplateTypeParmPackTypeLoc TL) { 3504 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3505} 3506void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3507 TemplateSpecializationTypeLoc TL) { 3508 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3509 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3510 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3511 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3512 TL.setArgLocInfo(i, 3513 Reader.GetTemplateArgumentLocInfo(F, 3514 TL.getTypePtr()->getArg(i).getKind(), 3515 Record, Idx)); 3516} 3517void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3518 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3519 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3520} 3521void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3522 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3523 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3524} 3525void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3526 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3527} 3528void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3529 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3530 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3531 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3532} 3533void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3534 DependentTemplateSpecializationTypeLoc TL) { 3535 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3536 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3537 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3538 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3539 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3540 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3541 TL.setArgLocInfo(I, 3542 Reader.GetTemplateArgumentLocInfo(F, 3543 TL.getTypePtr()->getArg(I).getKind(), 3544 Record, Idx)); 3545} 3546void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3547 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3548} 3549void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3550 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3551} 3552void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3553 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3554 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3555 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3556 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3557 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3558} 3559void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3560 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3561} 3562 3563TypeSourceInfo *ASTReader::GetTypeSourceInfo(PerFileData &F, 3564 const RecordData &Record, 3565 unsigned &Idx) { 3566 QualType InfoTy = GetType(Record[Idx++]); 3567 if (InfoTy.isNull()) 3568 return 0; 3569 3570 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3571 TypeLocReader TLR(*this, F, Record, Idx); 3572 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3573 TLR.Visit(TL); 3574 return TInfo; 3575} 3576 3577QualType ASTReader::GetType(TypeID ID) { 3578 unsigned FastQuals = ID & Qualifiers::FastMask; 3579 unsigned Index = ID >> Qualifiers::FastWidth; 3580 3581 if (Index < NUM_PREDEF_TYPE_IDS) { 3582 QualType T; 3583 switch ((PredefinedTypeIDs)Index) { 3584 case PREDEF_TYPE_NULL_ID: return QualType(); 3585 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3586 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3587 3588 case PREDEF_TYPE_CHAR_U_ID: 3589 case PREDEF_TYPE_CHAR_S_ID: 3590 // FIXME: Check that the signedness of CharTy is correct! 3591 T = Context->CharTy; 3592 break; 3593 3594 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3595 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3596 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3597 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3598 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 3599 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 3600 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 3601 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 3602 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 3603 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 3604 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 3605 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 3606 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 3607 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 3608 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 3609 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 3610 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 3611 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 3612 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 3613 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 3614 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 3615 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 3616 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 3617 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 3618 } 3619 3620 assert(!T.isNull() && "Unknown predefined type"); 3621 return T.withFastQualifiers(FastQuals); 3622 } 3623 3624 Index -= NUM_PREDEF_TYPE_IDS; 3625 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 3626 if (TypesLoaded[Index].isNull()) { 3627 TypesLoaded[Index] = ReadTypeRecord(Index); 3628 if (TypesLoaded[Index].isNull()) 3629 return QualType(); 3630 3631 TypesLoaded[Index]->setFromAST(); 3632 TypeIdxs[TypesLoaded[Index]] = TypeIdx::fromTypeID(ID); 3633 if (DeserializationListener) 3634 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 3635 TypesLoaded[Index]); 3636 } 3637 3638 return TypesLoaded[Index].withFastQualifiers(FastQuals); 3639} 3640 3641TypeID ASTReader::GetTypeID(QualType T) const { 3642 return MakeTypeID(T, 3643 std::bind1st(std::mem_fun(&ASTReader::GetTypeIdx), this)); 3644} 3645 3646TypeIdx ASTReader::GetTypeIdx(QualType T) const { 3647 if (T.isNull()) 3648 return TypeIdx(); 3649 assert(!T.getLocalFastQualifiers()); 3650 3651 TypeIdxMap::const_iterator I = TypeIdxs.find(T); 3652 // GetTypeIdx is mostly used for computing the hash of DeclarationNames and 3653 // comparing keys of ASTDeclContextNameLookupTable. 3654 // If the type didn't come from the AST file use a specially marked index 3655 // so that any hash/key comparison fail since no such index is stored 3656 // in a AST file. 3657 if (I == TypeIdxs.end()) 3658 return TypeIdx(-1); 3659 return I->second; 3660} 3661 3662unsigned ASTReader::getTotalNumCXXBaseSpecifiers() const { 3663 unsigned Result = 0; 3664 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 3665 Result += Chain[I]->LocalNumCXXBaseSpecifiers; 3666 3667 return Result; 3668} 3669 3670TemplateArgumentLocInfo 3671ASTReader::GetTemplateArgumentLocInfo(PerFileData &F, 3672 TemplateArgument::ArgKind Kind, 3673 const RecordData &Record, 3674 unsigned &Index) { 3675 switch (Kind) { 3676 case TemplateArgument::Expression: 3677 return ReadExpr(F); 3678 case TemplateArgument::Type: 3679 return GetTypeSourceInfo(F, Record, Index); 3680 case TemplateArgument::Template: { 3681 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3682 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3683 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3684 SourceLocation()); 3685 } 3686 case TemplateArgument::TemplateExpansion: { 3687 SourceRange QualifierRange = ReadSourceRange(F, Record, Index); 3688 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3689 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 3690 return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc, 3691 EllipsisLoc); 3692 } 3693 case TemplateArgument::Null: 3694 case TemplateArgument::Integral: 3695 case TemplateArgument::Declaration: 3696 case TemplateArgument::Pack: 3697 return TemplateArgumentLocInfo(); 3698 } 3699 llvm_unreachable("unexpected template argument loc"); 3700 return TemplateArgumentLocInfo(); 3701} 3702 3703TemplateArgumentLoc 3704ASTReader::ReadTemplateArgumentLoc(PerFileData &F, 3705 const RecordData &Record, unsigned &Index) { 3706 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 3707 3708 if (Arg.getKind() == TemplateArgument::Expression) { 3709 if (Record[Index++]) // bool InfoHasSameExpr. 3710 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 3711 } 3712 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 3713 Record, Index)); 3714} 3715 3716Decl *ASTReader::GetExternalDecl(uint32_t ID) { 3717 return GetDecl(ID); 3718} 3719 3720uint64_t 3721ASTReader::GetCXXBaseSpecifiersOffset(serialization::CXXBaseSpecifiersID ID) { 3722 if (ID == 0) 3723 return 0; 3724 3725 --ID; 3726 uint64_t Offset = 0; 3727 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3728 if (ID < Chain[I]->LocalNumCXXBaseSpecifiers) 3729 return Offset + Chain[I]->CXXBaseSpecifiersOffsets[ID]; 3730 3731 ID -= Chain[I]->LocalNumCXXBaseSpecifiers; 3732 Offset += Chain[I]->SizeInBits; 3733 } 3734 3735 assert(false && "CXXBaseSpecifiers not found"); 3736 return 0; 3737} 3738 3739CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 3740 // Figure out which AST file contains this offset. 3741 PerFileData *F = 0; 3742 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3743 if (Offset < Chain[I]->SizeInBits) { 3744 F = Chain[I]; 3745 break; 3746 } 3747 3748 Offset -= Chain[I]->SizeInBits; 3749 } 3750 3751 if (!F) { 3752 Error("Malformed AST file: C++ base specifiers at impossible offset"); 3753 return 0; 3754 } 3755 3756 llvm::BitstreamCursor &Cursor = F->DeclsCursor; 3757 SavedStreamPosition SavedPosition(Cursor); 3758 Cursor.JumpToBit(Offset); 3759 ReadingKindTracker ReadingKind(Read_Decl, *this); 3760 RecordData Record; 3761 unsigned Code = Cursor.ReadCode(); 3762 unsigned RecCode = Cursor.ReadRecord(Code, Record); 3763 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 3764 Error("Malformed AST file: missing C++ base specifiers"); 3765 return 0; 3766 } 3767 3768 unsigned Idx = 0; 3769 unsigned NumBases = Record[Idx++]; 3770 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 3771 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 3772 for (unsigned I = 0; I != NumBases; ++I) 3773 Bases[I] = ReadCXXBaseSpecifier(*F, Record, Idx); 3774 return Bases; 3775} 3776 3777TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 3778 if (!DeclsLoaded[0]) { 3779 ReadDeclRecord(0, 1); 3780 if (DeserializationListener) 3781 DeserializationListener->DeclRead(1, DeclsLoaded[0]); 3782 } 3783 3784 return cast<TranslationUnitDecl>(DeclsLoaded[0]); 3785} 3786 3787Decl *ASTReader::GetDecl(DeclID ID) { 3788 if (ID == 0) 3789 return 0; 3790 3791 if (ID > DeclsLoaded.size()) { 3792 Error("declaration ID out-of-range for AST file"); 3793 return 0; 3794 } 3795 3796 unsigned Index = ID - 1; 3797 if (!DeclsLoaded[Index]) { 3798 ReadDeclRecord(Index, ID); 3799 if (DeserializationListener) 3800 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 3801 } 3802 3803 return DeclsLoaded[Index]; 3804} 3805 3806/// \brief Resolve the offset of a statement into a statement. 3807/// 3808/// This operation will read a new statement from the external 3809/// source each time it is called, and is meant to be used via a 3810/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 3811Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 3812 // Switch case IDs are per Decl. 3813 ClearSwitchCaseIDs(); 3814 3815 // Offset here is a global offset across the entire chain. 3816 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3817 PerFileData &F = *Chain[N - I - 1]; 3818 if (Offset < F.SizeInBits) { 3819 // Since we know that this statement is part of a decl, make sure to use 3820 // the decl cursor to read it. 3821 F.DeclsCursor.JumpToBit(Offset); 3822 return ReadStmtFromStream(F); 3823 } 3824 Offset -= F.SizeInBits; 3825 } 3826 llvm_unreachable("Broken chain"); 3827} 3828 3829bool ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 3830 bool (*isKindWeWant)(Decl::Kind), 3831 llvm::SmallVectorImpl<Decl*> &Decls) { 3832 assert(DC->hasExternalLexicalStorage() && 3833 "DeclContext has no lexical decls in storage"); 3834 3835 // There might be lexical decls in multiple parts of the chain, for the TU 3836 // at least. 3837 // DeclContextOffsets might reallocate as we load additional decls below, 3838 // so make a copy of the vector. 3839 DeclContextInfos Infos = DeclContextOffsets[DC]; 3840 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3841 I != E; ++I) { 3842 // IDs can be 0 if this context doesn't contain declarations. 3843 if (!I->LexicalDecls) 3844 continue; 3845 3846 // Load all of the declaration IDs 3847 for (const KindDeclIDPair *ID = I->LexicalDecls, 3848 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 3849 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 3850 continue; 3851 3852 Decl *D = GetDecl(ID->second); 3853 assert(D && "Null decl in lexical decls"); 3854 Decls.push_back(D); 3855 } 3856 } 3857 3858 ++NumLexicalDeclContextsRead; 3859 return false; 3860} 3861 3862DeclContext::lookup_result 3863ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 3864 DeclarationName Name) { 3865 assert(DC->hasExternalVisibleStorage() && 3866 "DeclContext has no visible decls in storage"); 3867 if (!Name) 3868 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 3869 DeclContext::lookup_iterator(0)); 3870 3871 llvm::SmallVector<NamedDecl *, 64> Decls; 3872 // There might be visible decls in multiple parts of the chain, for the TU 3873 // and namespaces. For any given name, the last available results replace 3874 // all earlier ones. For this reason, we walk in reverse. 3875 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3876 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 3877 I != E; ++I) { 3878 if (!I->NameLookupTableData) 3879 continue; 3880 3881 ASTDeclContextNameLookupTable *LookupTable = 3882 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3883 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 3884 if (Pos == LookupTable->end()) 3885 continue; 3886 3887 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 3888 for (; Data.first != Data.second; ++Data.first) 3889 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3890 break; 3891 } 3892 3893 ++NumVisibleDeclContextsRead; 3894 3895 SetExternalVisibleDeclsForName(DC, Name, Decls); 3896 return const_cast<DeclContext*>(DC)->lookup(Name); 3897} 3898 3899void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 3900 assert(DC->hasExternalVisibleStorage() && 3901 "DeclContext has no visible decls in storage"); 3902 3903 llvm::SmallVector<NamedDecl *, 64> Decls; 3904 // There might be visible decls in multiple parts of the chain, for the TU 3905 // and namespaces. 3906 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3907 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3908 I != E; ++I) { 3909 if (!I->NameLookupTableData) 3910 continue; 3911 3912 ASTDeclContextNameLookupTable *LookupTable = 3913 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3914 for (ASTDeclContextNameLookupTable::item_iterator 3915 ItemI = LookupTable->item_begin(), 3916 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 3917 ASTDeclContextNameLookupTable::item_iterator::value_type Val 3918 = *ItemI; 3919 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 3920 Decls.clear(); 3921 for (; Data.first != Data.second; ++Data.first) 3922 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3923 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 3924 } 3925 } 3926} 3927 3928void ASTReader::PassInterestingDeclsToConsumer() { 3929 assert(Consumer); 3930 while (!InterestingDecls.empty()) { 3931 DeclGroupRef DG(InterestingDecls.front()); 3932 InterestingDecls.pop_front(); 3933 Consumer->HandleInterestingDecl(DG); 3934 } 3935} 3936 3937void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 3938 this->Consumer = Consumer; 3939 3940 if (!Consumer) 3941 return; 3942 3943 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 3944 // Force deserialization of this decl, which will cause it to be queued for 3945 // passing to the consumer. 3946 GetDecl(ExternalDefinitions[I]); 3947 } 3948 3949 PassInterestingDeclsToConsumer(); 3950} 3951 3952void ASTReader::PrintStats() { 3953 std::fprintf(stderr, "*** AST File Statistics:\n"); 3954 3955 unsigned NumTypesLoaded 3956 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 3957 QualType()); 3958 unsigned NumDeclsLoaded 3959 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 3960 (Decl *)0); 3961 unsigned NumIdentifiersLoaded 3962 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 3963 IdentifiersLoaded.end(), 3964 (IdentifierInfo *)0); 3965 unsigned NumSelectorsLoaded 3966 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 3967 SelectorsLoaded.end(), 3968 Selector()); 3969 3970 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 3971 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 3972 if (TotalNumSLocEntries) 3973 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 3974 NumSLocEntriesRead, TotalNumSLocEntries, 3975 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 3976 if (!TypesLoaded.empty()) 3977 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 3978 NumTypesLoaded, (unsigned)TypesLoaded.size(), 3979 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 3980 if (!DeclsLoaded.empty()) 3981 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 3982 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 3983 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 3984 if (!IdentifiersLoaded.empty()) 3985 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 3986 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 3987 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 3988 if (!SelectorsLoaded.empty()) 3989 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 3990 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 3991 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 3992 if (TotalNumStatements) 3993 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 3994 NumStatementsRead, TotalNumStatements, 3995 ((float)NumStatementsRead/TotalNumStatements * 100)); 3996 if (TotalNumMacros) 3997 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 3998 NumMacrosRead, TotalNumMacros, 3999 ((float)NumMacrosRead/TotalNumMacros * 100)); 4000 if (TotalLexicalDeclContexts) 4001 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4002 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4003 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4004 * 100)); 4005 if (TotalVisibleDeclContexts) 4006 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4007 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4008 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4009 * 100)); 4010 if (TotalNumMethodPoolEntries) { 4011 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4012 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4013 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4014 * 100)); 4015 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4016 } 4017 std::fprintf(stderr, "\n"); 4018} 4019 4020void ASTReader::InitializeSema(Sema &S) { 4021 SemaObj = &S; 4022 S.ExternalSource = this; 4023 4024 // Makes sure any declarations that were deserialized "too early" 4025 // still get added to the identifier's declaration chains. 4026 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4027 if (SemaObj->TUScope) 4028 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4029 4030 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4031 } 4032 PreloadedDecls.clear(); 4033 4034 // If there were any tentative definitions, deserialize them and add 4035 // them to Sema's list of tentative definitions. 4036 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4037 VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I])); 4038 SemaObj->TentativeDefinitions.push_back(Var); 4039 } 4040 4041 // If there were any unused file scoped decls, deserialize them and add to 4042 // Sema's list of unused file scoped decls. 4043 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4044 DeclaratorDecl *D = cast<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4045 SemaObj->UnusedFileScopedDecls.push_back(D); 4046 } 4047 4048 // If there were any locally-scoped external declarations, 4049 // deserialize them and add them to Sema's table of locally-scoped 4050 // external declarations. 4051 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4052 NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4053 SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D; 4054 } 4055 4056 // If there were any ext_vector type declarations, deserialize them 4057 // and add them to Sema's vector of such declarations. 4058 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) 4059 SemaObj->ExtVectorDecls.push_back( 4060 cast<TypedefDecl>(GetDecl(ExtVectorDecls[I]))); 4061 4062 // FIXME: Do VTable uses and dynamic classes deserialize too much ? 4063 // Can we cut them down before writing them ? 4064 4065 // If there were any dynamic classes declarations, deserialize them 4066 // and add them to Sema's vector of such declarations. 4067 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) 4068 SemaObj->DynamicClasses.push_back( 4069 cast<CXXRecordDecl>(GetDecl(DynamicClasses[I]))); 4070 4071 // Load the offsets of the declarations that Sema references. 4072 // They will be lazily deserialized when needed. 4073 if (!SemaDeclRefs.empty()) { 4074 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4075 SemaObj->StdNamespace = SemaDeclRefs[0]; 4076 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4077 } 4078 4079 for (PerFileData *F = FirstInSource; F; F = F->NextInSource) { 4080 4081 // If there are @selector references added them to its pool. This is for 4082 // implementation of -Wselector. 4083 if (!F->ReferencedSelectorsData.empty()) { 4084 unsigned int DataSize = F->ReferencedSelectorsData.size()-1; 4085 unsigned I = 0; 4086 while (I < DataSize) { 4087 Selector Sel = DecodeSelector(F->ReferencedSelectorsData[I++]); 4088 SourceLocation SelLoc = ReadSourceLocation( 4089 *F, F->ReferencedSelectorsData, I); 4090 SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc)); 4091 } 4092 } 4093 4094 // If there were any pending implicit instantiations, deserialize them 4095 // and add them to Sema's queue of such instantiations. 4096 assert(F->PendingInstantiations.size() % 2 == 0 && 4097 "Expected pairs of entries"); 4098 for (unsigned Idx = 0, N = F->PendingInstantiations.size(); Idx < N;) { 4099 ValueDecl *D=cast<ValueDecl>(GetDecl(F->PendingInstantiations[Idx++])); 4100 SourceLocation Loc = ReadSourceLocation(*F, F->PendingInstantiations,Idx); 4101 SemaObj->PendingInstantiations.push_back(std::make_pair(D, Loc)); 4102 } 4103 } 4104 4105 // The two special data sets below always come from the most recent PCH, 4106 // which is at the front of the chain. 4107 PerFileData &F = *Chain.front(); 4108 4109 // If there were any weak undeclared identifiers, deserialize them and add to 4110 // Sema's list of weak undeclared identifiers. 4111 if (!WeakUndeclaredIdentifiers.empty()) { 4112 unsigned Idx = 0; 4113 for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) { 4114 IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4115 IdentifierInfo *AliasId= GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4116 SourceLocation Loc = ReadSourceLocation(F, WeakUndeclaredIdentifiers,Idx); 4117 bool Used = WeakUndeclaredIdentifiers[Idx++]; 4118 Sema::WeakInfo WI(AliasId, Loc); 4119 WI.setUsed(Used); 4120 SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI)); 4121 } 4122 } 4123 4124 // If there were any VTable uses, deserialize the information and add it 4125 // to Sema's vector and map of VTable uses. 4126 if (!VTableUses.empty()) { 4127 unsigned Idx = 0; 4128 for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) { 4129 CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4130 SourceLocation Loc = ReadSourceLocation(F, VTableUses, Idx); 4131 bool DefinitionRequired = VTableUses[Idx++]; 4132 SemaObj->VTableUses.push_back(std::make_pair(Class, Loc)); 4133 SemaObj->VTablesUsed[Class] = DefinitionRequired; 4134 } 4135 } 4136 4137 if (!FPPragmaOptions.empty()) { 4138 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4139 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4140 } 4141 4142 if (!OpenCLExtensions.empty()) { 4143 unsigned I = 0; 4144#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4145#include "clang/Basic/OpenCLExtensions.def" 4146 4147 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4148 } 4149} 4150 4151IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4152 // Try to find this name within our on-disk hash tables. We start with the 4153 // most recent one, since that one contains the most up-to-date info. 4154 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4155 ASTIdentifierLookupTable *IdTable 4156 = (ASTIdentifierLookupTable *)Chain[I]->IdentifierLookupTable; 4157 if (!IdTable) 4158 continue; 4159 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4160 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4161 if (Pos == IdTable->end()) 4162 continue; 4163 4164 // Dereferencing the iterator has the effect of building the 4165 // IdentifierInfo node and populating it with the various 4166 // declarations it needs. 4167 return *Pos; 4168 } 4169 return 0; 4170} 4171 4172namespace clang { 4173 /// \brief An identifier-lookup iterator that enumerates all of the 4174 /// identifiers stored within a set of AST files. 4175 class ASTIdentifierIterator : public IdentifierIterator { 4176 /// \brief The AST reader whose identifiers are being enumerated. 4177 const ASTReader &Reader; 4178 4179 /// \brief The current index into the chain of AST files stored in 4180 /// the AST reader. 4181 unsigned Index; 4182 4183 /// \brief The current position within the identifier lookup table 4184 /// of the current AST file. 4185 ASTIdentifierLookupTable::key_iterator Current; 4186 4187 /// \brief The end position within the identifier lookup table of 4188 /// the current AST file. 4189 ASTIdentifierLookupTable::key_iterator End; 4190 4191 public: 4192 explicit ASTIdentifierIterator(const ASTReader &Reader); 4193 4194 virtual llvm::StringRef Next(); 4195 }; 4196} 4197 4198ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4199 : Reader(Reader), Index(Reader.Chain.size() - 1) { 4200 ASTIdentifierLookupTable *IdTable 4201 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4202 Current = IdTable->key_begin(); 4203 End = IdTable->key_end(); 4204} 4205 4206llvm::StringRef ASTIdentifierIterator::Next() { 4207 while (Current == End) { 4208 // If we have exhausted all of our AST files, we're done. 4209 if (Index == 0) 4210 return llvm::StringRef(); 4211 4212 --Index; 4213 ASTIdentifierLookupTable *IdTable 4214 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4215 Current = IdTable->key_begin(); 4216 End = IdTable->key_end(); 4217 } 4218 4219 // We have any identifiers remaining in the current AST file; return 4220 // the next one. 4221 std::pair<const char*, unsigned> Key = *Current; 4222 ++Current; 4223 return llvm::StringRef(Key.first, Key.second); 4224} 4225 4226IdentifierIterator *ASTReader::getIdentifiers() const { 4227 return new ASTIdentifierIterator(*this); 4228} 4229 4230std::pair<ObjCMethodList, ObjCMethodList> 4231ASTReader::ReadMethodPool(Selector Sel) { 4232 // Find this selector in a hash table. We want to find the most recent entry. 4233 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4234 PerFileData &F = *Chain[I]; 4235 if (!F.SelectorLookupTable) 4236 continue; 4237 4238 ASTSelectorLookupTable *PoolTable 4239 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4240 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4241 if (Pos != PoolTable->end()) { 4242 ++NumSelectorsRead; 4243 // FIXME: Not quite happy with the statistics here. We probably should 4244 // disable this tracking when called via LoadSelector. 4245 // Also, should entries without methods count as misses? 4246 ++NumMethodPoolEntriesRead; 4247 ASTSelectorLookupTrait::data_type Data = *Pos; 4248 if (DeserializationListener) 4249 DeserializationListener->SelectorRead(Data.ID, Sel); 4250 return std::make_pair(Data.Instance, Data.Factory); 4251 } 4252 } 4253 4254 ++NumMethodPoolMisses; 4255 return std::pair<ObjCMethodList, ObjCMethodList>(); 4256} 4257 4258void ASTReader::LoadSelector(Selector Sel) { 4259 // It would be complicated to avoid reading the methods anyway. So don't. 4260 ReadMethodPool(Sel); 4261} 4262 4263void ASTReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) { 4264 assert(ID && "Non-zero identifier ID required"); 4265 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4266 IdentifiersLoaded[ID - 1] = II; 4267 if (DeserializationListener) 4268 DeserializationListener->IdentifierRead(ID, II); 4269} 4270 4271/// \brief Set the globally-visible declarations associated with the given 4272/// identifier. 4273/// 4274/// If the AST reader is currently in a state where the given declaration IDs 4275/// cannot safely be resolved, they are queued until it is safe to resolve 4276/// them. 4277/// 4278/// \param II an IdentifierInfo that refers to one or more globally-visible 4279/// declarations. 4280/// 4281/// \param DeclIDs the set of declaration IDs with the name @p II that are 4282/// visible at global scope. 4283/// 4284/// \param Nonrecursive should be true to indicate that the caller knows that 4285/// this call is non-recursive, and therefore the globally-visible declarations 4286/// will not be placed onto the pending queue. 4287void 4288ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4289 const llvm::SmallVectorImpl<uint32_t> &DeclIDs, 4290 bool Nonrecursive) { 4291 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4292 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4293 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4294 PII.II = II; 4295 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4296 return; 4297 } 4298 4299 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4300 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4301 if (SemaObj) { 4302 if (SemaObj->TUScope) { 4303 // Introduce this declaration into the translation-unit scope 4304 // and add it to the declaration chain for this identifier, so 4305 // that (unqualified) name lookup will find it. 4306 SemaObj->TUScope->AddDecl(D); 4307 } 4308 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4309 } else { 4310 // Queue this declaration so that it will be added to the 4311 // translation unit scope and identifier's declaration chain 4312 // once a Sema object is known. 4313 PreloadedDecls.push_back(D); 4314 } 4315 } 4316} 4317 4318IdentifierInfo *ASTReader::DecodeIdentifierInfo(unsigned ID) { 4319 if (ID == 0) 4320 return 0; 4321 4322 if (IdentifiersLoaded.empty()) { 4323 Error("no identifier table in AST file"); 4324 return 0; 4325 } 4326 4327 assert(PP && "Forgot to set Preprocessor ?"); 4328 ID -= 1; 4329 if (!IdentifiersLoaded[ID]) { 4330 unsigned Index = ID; 4331 const char *Str = 0; 4332 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4333 PerFileData *F = Chain[N - I - 1]; 4334 if (Index < F->LocalNumIdentifiers) { 4335 uint32_t Offset = F->IdentifierOffsets[Index]; 4336 Str = F->IdentifierTableData + Offset; 4337 break; 4338 } 4339 Index -= F->LocalNumIdentifiers; 4340 } 4341 assert(Str && "Broken Chain"); 4342 4343 // All of the strings in the AST file are preceded by a 16-bit length. 4344 // Extract that 16-bit length to avoid having to execute strlen(). 4345 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4346 // unsigned integers. This is important to avoid integer overflow when 4347 // we cast them to 'unsigned'. 4348 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4349 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4350 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4351 IdentifiersLoaded[ID] 4352 = &PP->getIdentifierTable().get(Str, StrLen); 4353 if (DeserializationListener) 4354 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4355 } 4356 4357 return IdentifiersLoaded[ID]; 4358} 4359 4360void ASTReader::ReadSLocEntry(unsigned ID) { 4361 ReadSLocEntryRecord(ID); 4362} 4363 4364Selector ASTReader::DecodeSelector(unsigned ID) { 4365 if (ID == 0) 4366 return Selector(); 4367 4368 if (ID > SelectorsLoaded.size()) { 4369 Error("selector ID out of range in AST file"); 4370 return Selector(); 4371 } 4372 4373 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4374 // Load this selector from the selector table. 4375 unsigned Idx = ID - 1; 4376 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4377 PerFileData &F = *Chain[N - I - 1]; 4378 if (Idx < F.LocalNumSelectors) { 4379 ASTSelectorLookupTrait Trait(*this); 4380 SelectorsLoaded[ID - 1] = 4381 Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0); 4382 if (DeserializationListener) 4383 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4384 break; 4385 } 4386 Idx -= F.LocalNumSelectors; 4387 } 4388 } 4389 4390 return SelectorsLoaded[ID - 1]; 4391} 4392 4393Selector ASTReader::GetExternalSelector(uint32_t ID) { 4394 return DecodeSelector(ID); 4395} 4396 4397uint32_t ASTReader::GetNumExternalSelectors() { 4398 // ID 0 (the null selector) is considered an external selector. 4399 return getTotalNumSelectors() + 1; 4400} 4401 4402DeclarationName 4403ASTReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) { 4404 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4405 switch (Kind) { 4406 case DeclarationName::Identifier: 4407 return DeclarationName(GetIdentifierInfo(Record, Idx)); 4408 4409 case DeclarationName::ObjCZeroArgSelector: 4410 case DeclarationName::ObjCOneArgSelector: 4411 case DeclarationName::ObjCMultiArgSelector: 4412 return DeclarationName(GetSelector(Record, Idx)); 4413 4414 case DeclarationName::CXXConstructorName: 4415 return Context->DeclarationNames.getCXXConstructorName( 4416 Context->getCanonicalType(GetType(Record[Idx++]))); 4417 4418 case DeclarationName::CXXDestructorName: 4419 return Context->DeclarationNames.getCXXDestructorName( 4420 Context->getCanonicalType(GetType(Record[Idx++]))); 4421 4422 case DeclarationName::CXXConversionFunctionName: 4423 return Context->DeclarationNames.getCXXConversionFunctionName( 4424 Context->getCanonicalType(GetType(Record[Idx++]))); 4425 4426 case DeclarationName::CXXOperatorName: 4427 return Context->DeclarationNames.getCXXOperatorName( 4428 (OverloadedOperatorKind)Record[Idx++]); 4429 4430 case DeclarationName::CXXLiteralOperatorName: 4431 return Context->DeclarationNames.getCXXLiteralOperatorName( 4432 GetIdentifierInfo(Record, Idx)); 4433 4434 case DeclarationName::CXXUsingDirective: 4435 return DeclarationName::getUsingDirectiveName(); 4436 } 4437 4438 // Required to silence GCC warning 4439 return DeclarationName(); 4440} 4441 4442void ASTReader::ReadDeclarationNameLoc(PerFileData &F, 4443 DeclarationNameLoc &DNLoc, 4444 DeclarationName Name, 4445 const RecordData &Record, unsigned &Idx) { 4446 switch (Name.getNameKind()) { 4447 case DeclarationName::CXXConstructorName: 4448 case DeclarationName::CXXDestructorName: 4449 case DeclarationName::CXXConversionFunctionName: 4450 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4451 break; 4452 4453 case DeclarationName::CXXOperatorName: 4454 DNLoc.CXXOperatorName.BeginOpNameLoc 4455 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4456 DNLoc.CXXOperatorName.EndOpNameLoc 4457 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4458 break; 4459 4460 case DeclarationName::CXXLiteralOperatorName: 4461 DNLoc.CXXLiteralOperatorName.OpNameLoc 4462 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4463 break; 4464 4465 case DeclarationName::Identifier: 4466 case DeclarationName::ObjCZeroArgSelector: 4467 case DeclarationName::ObjCOneArgSelector: 4468 case DeclarationName::ObjCMultiArgSelector: 4469 case DeclarationName::CXXUsingDirective: 4470 break; 4471 } 4472} 4473 4474void ASTReader::ReadDeclarationNameInfo(PerFileData &F, 4475 DeclarationNameInfo &NameInfo, 4476 const RecordData &Record, unsigned &Idx) { 4477 NameInfo.setName(ReadDeclarationName(Record, Idx)); 4478 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4479 DeclarationNameLoc DNLoc; 4480 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4481 NameInfo.setInfo(DNLoc); 4482} 4483 4484void ASTReader::ReadQualifierInfo(PerFileData &F, QualifierInfo &Info, 4485 const RecordData &Record, unsigned &Idx) { 4486 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4487 unsigned NumTPLists = Record[Idx++]; 4488 Info.NumTemplParamLists = NumTPLists; 4489 if (NumTPLists) { 4490 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 4491 for (unsigned i=0; i != NumTPLists; ++i) 4492 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4493 } 4494} 4495 4496TemplateName 4497ASTReader::ReadTemplateName(PerFileData &F, const RecordData &Record, 4498 unsigned &Idx) { 4499 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 4500 switch (Kind) { 4501 case TemplateName::Template: 4502 return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++]))); 4503 4504 case TemplateName::OverloadedTemplate: { 4505 unsigned size = Record[Idx++]; 4506 UnresolvedSet<8> Decls; 4507 while (size--) 4508 Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4509 4510 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 4511 } 4512 4513 case TemplateName::QualifiedTemplate: { 4514 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4515 bool hasTemplKeyword = Record[Idx++]; 4516 TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++])); 4517 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 4518 } 4519 4520 case TemplateName::DependentTemplate: { 4521 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4522 if (Record[Idx++]) // isIdentifier 4523 return Context->getDependentTemplateName(NNS, 4524 GetIdentifierInfo(Record, Idx)); 4525 return Context->getDependentTemplateName(NNS, 4526 (OverloadedOperatorKind)Record[Idx++]); 4527 } 4528 4529 case TemplateName::SubstTemplateTemplateParmPack: { 4530 TemplateTemplateParmDecl *Param 4531 = cast_or_null<TemplateTemplateParmDecl>(GetDecl(Record[Idx++])); 4532 if (!Param) 4533 return TemplateName(); 4534 4535 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 4536 if (ArgPack.getKind() != TemplateArgument::Pack) 4537 return TemplateName(); 4538 4539 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 4540 } 4541 } 4542 4543 assert(0 && "Unhandled template name kind!"); 4544 return TemplateName(); 4545} 4546 4547TemplateArgument 4548ASTReader::ReadTemplateArgument(PerFileData &F, 4549 const RecordData &Record, unsigned &Idx) { 4550 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 4551 switch (Kind) { 4552 case TemplateArgument::Null: 4553 return TemplateArgument(); 4554 case TemplateArgument::Type: 4555 return TemplateArgument(GetType(Record[Idx++])); 4556 case TemplateArgument::Declaration: 4557 return TemplateArgument(GetDecl(Record[Idx++])); 4558 case TemplateArgument::Integral: { 4559 llvm::APSInt Value = ReadAPSInt(Record, Idx); 4560 QualType T = GetType(Record[Idx++]); 4561 return TemplateArgument(Value, T); 4562 } 4563 case TemplateArgument::Template: 4564 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 4565 case TemplateArgument::TemplateExpansion: { 4566 TemplateName Name = ReadTemplateName(F, Record, Idx); 4567 llvm::Optional<unsigned> NumTemplateExpansions; 4568 if (unsigned NumExpansions = Record[Idx++]) 4569 NumTemplateExpansions = NumExpansions - 1; 4570 return TemplateArgument(Name, NumTemplateExpansions); 4571 } 4572 case TemplateArgument::Expression: 4573 return TemplateArgument(ReadExpr(F)); 4574 case TemplateArgument::Pack: { 4575 unsigned NumArgs = Record[Idx++]; 4576 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 4577 for (unsigned I = 0; I != NumArgs; ++I) 4578 Args[I] = ReadTemplateArgument(F, Record, Idx); 4579 return TemplateArgument(Args, NumArgs); 4580 } 4581 } 4582 4583 assert(0 && "Unhandled template argument kind!"); 4584 return TemplateArgument(); 4585} 4586 4587TemplateParameterList * 4588ASTReader::ReadTemplateParameterList(PerFileData &F, 4589 const RecordData &Record, unsigned &Idx) { 4590 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 4591 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 4592 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 4593 4594 unsigned NumParams = Record[Idx++]; 4595 llvm::SmallVector<NamedDecl *, 16> Params; 4596 Params.reserve(NumParams); 4597 while (NumParams--) 4598 Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4599 4600 TemplateParameterList* TemplateParams = 4601 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 4602 Params.data(), Params.size(), RAngleLoc); 4603 return TemplateParams; 4604} 4605 4606void 4607ASTReader:: 4608ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, 4609 PerFileData &F, const RecordData &Record, 4610 unsigned &Idx) { 4611 unsigned NumTemplateArgs = Record[Idx++]; 4612 TemplArgs.reserve(NumTemplateArgs); 4613 while (NumTemplateArgs--) 4614 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 4615} 4616 4617/// \brief Read a UnresolvedSet structure. 4618void ASTReader::ReadUnresolvedSet(UnresolvedSetImpl &Set, 4619 const RecordData &Record, unsigned &Idx) { 4620 unsigned NumDecls = Record[Idx++]; 4621 while (NumDecls--) { 4622 NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++])); 4623 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 4624 Set.addDecl(D, AS); 4625 } 4626} 4627 4628CXXBaseSpecifier 4629ASTReader::ReadCXXBaseSpecifier(PerFileData &F, 4630 const RecordData &Record, unsigned &Idx) { 4631 bool isVirtual = static_cast<bool>(Record[Idx++]); 4632 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 4633 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 4634 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 4635 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 4636 SourceRange Range = ReadSourceRange(F, Record, Idx); 4637 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 4638 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 4639 EllipsisLoc); 4640 Result.setInheritConstructors(inheritConstructors); 4641 return Result; 4642} 4643 4644std::pair<CXXCtorInitializer **, unsigned> 4645ASTReader::ReadCXXCtorInitializers(PerFileData &F, const RecordData &Record, 4646 unsigned &Idx) { 4647 CXXCtorInitializer **CtorInitializers = 0; 4648 unsigned NumInitializers = Record[Idx++]; 4649 if (NumInitializers) { 4650 ASTContext &C = *getContext(); 4651 4652 CtorInitializers 4653 = new (C) CXXCtorInitializer*[NumInitializers]; 4654 for (unsigned i=0; i != NumInitializers; ++i) { 4655 TypeSourceInfo *BaseClassInfo = 0; 4656 bool IsBaseVirtual = false; 4657 FieldDecl *Member = 0; 4658 IndirectFieldDecl *IndirectMember = 0; 4659 4660 bool IsBaseInitializer = Record[Idx++]; 4661 if (IsBaseInitializer) { 4662 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 4663 IsBaseVirtual = Record[Idx++]; 4664 } else { 4665 bool IsIndirectMemberInitializer = Record[Idx++]; 4666 if (IsIndirectMemberInitializer) 4667 IndirectMember = cast<IndirectFieldDecl>(GetDecl(Record[Idx++])); 4668 else 4669 Member = cast<FieldDecl>(GetDecl(Record[Idx++])); 4670 } 4671 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 4672 Expr *Init = ReadExpr(F); 4673 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 4674 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 4675 bool IsWritten = Record[Idx++]; 4676 unsigned SourceOrderOrNumArrayIndices; 4677 llvm::SmallVector<VarDecl *, 8> Indices; 4678 if (IsWritten) { 4679 SourceOrderOrNumArrayIndices = Record[Idx++]; 4680 } else { 4681 SourceOrderOrNumArrayIndices = Record[Idx++]; 4682 Indices.reserve(SourceOrderOrNumArrayIndices); 4683 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 4684 Indices.push_back(cast<VarDecl>(GetDecl(Record[Idx++]))); 4685 } 4686 4687 CXXCtorInitializer *BOMInit; 4688 if (IsBaseInitializer) { 4689 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 4690 LParenLoc, Init, RParenLoc, 4691 MemberOrEllipsisLoc); 4692 } else if (IsWritten) { 4693 if (Member) 4694 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 4695 LParenLoc, Init, RParenLoc); 4696 else 4697 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 4698 MemberOrEllipsisLoc, LParenLoc, 4699 Init, RParenLoc); 4700 } else { 4701 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 4702 LParenLoc, Init, RParenLoc, 4703 Indices.data(), Indices.size()); 4704 } 4705 4706 if (IsWritten) 4707 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 4708 CtorInitializers[i] = BOMInit; 4709 } 4710 } 4711 4712 return std::make_pair(CtorInitializers, NumInitializers); 4713} 4714 4715NestedNameSpecifier * 4716ASTReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) { 4717 unsigned N = Record[Idx++]; 4718 NestedNameSpecifier *NNS = 0, *Prev = 0; 4719 for (unsigned I = 0; I != N; ++I) { 4720 NestedNameSpecifier::SpecifierKind Kind 4721 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4722 switch (Kind) { 4723 case NestedNameSpecifier::Identifier: { 4724 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4725 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 4726 break; 4727 } 4728 4729 case NestedNameSpecifier::Namespace: { 4730 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4731 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 4732 break; 4733 } 4734 4735 case NestedNameSpecifier::NamespaceAlias: { 4736 NamespaceAliasDecl *Alias 4737 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4738 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 4739 break; 4740 } 4741 4742 case NestedNameSpecifier::TypeSpec: 4743 case NestedNameSpecifier::TypeSpecWithTemplate: { 4744 const Type *T = GetType(Record[Idx++]).getTypePtrOrNull(); 4745 if (!T) 4746 return 0; 4747 4748 bool Template = Record[Idx++]; 4749 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 4750 break; 4751 } 4752 4753 case NestedNameSpecifier::Global: { 4754 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 4755 // No associated value, and there can't be a prefix. 4756 break; 4757 } 4758 } 4759 Prev = NNS; 4760 } 4761 return NNS; 4762} 4763 4764NestedNameSpecifierLoc 4765ASTReader::ReadNestedNameSpecifierLoc(PerFileData &F, const RecordData &Record, 4766 unsigned &Idx) { 4767 unsigned N = Record[Idx++]; 4768 NestedNameSpecifierLocBuilder Builder; 4769 for (unsigned I = 0; I != N; ++I) { 4770 NestedNameSpecifier::SpecifierKind Kind 4771 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4772 switch (Kind) { 4773 case NestedNameSpecifier::Identifier: { 4774 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4775 SourceRange Range = ReadSourceRange(F, Record, Idx); 4776 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 4777 break; 4778 } 4779 4780 case NestedNameSpecifier::Namespace: { 4781 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4782 SourceRange Range = ReadSourceRange(F, Record, Idx); 4783 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 4784 break; 4785 } 4786 4787 case NestedNameSpecifier::NamespaceAlias: { 4788 NamespaceAliasDecl *Alias 4789 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4790 SourceRange Range = ReadSourceRange(F, Record, Idx); 4791 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 4792 break; 4793 } 4794 4795 case NestedNameSpecifier::TypeSpec: 4796 case NestedNameSpecifier::TypeSpecWithTemplate: { 4797 bool Template = Record[Idx++]; 4798 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 4799 if (!T) 4800 return NestedNameSpecifierLoc(); 4801 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4802 4803 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 4804 Builder.Extend(*Context, 4805 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 4806 T->getTypeLoc(), ColonColonLoc); 4807 break; 4808 } 4809 4810 case NestedNameSpecifier::Global: { 4811 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4812 Builder.MakeGlobal(*Context, ColonColonLoc); 4813 break; 4814 } 4815 } 4816 } 4817 4818 return Builder.getWithLocInContext(*Context); 4819} 4820 4821SourceRange 4822ASTReader::ReadSourceRange(PerFileData &F, const RecordData &Record, 4823 unsigned &Idx) { 4824 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 4825 SourceLocation end = ReadSourceLocation(F, Record, Idx); 4826 return SourceRange(beg, end); 4827} 4828 4829/// \brief Read an integral value 4830llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 4831 unsigned BitWidth = Record[Idx++]; 4832 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 4833 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 4834 Idx += NumWords; 4835 return Result; 4836} 4837 4838/// \brief Read a signed integral value 4839llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 4840 bool isUnsigned = Record[Idx++]; 4841 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 4842} 4843 4844/// \brief Read a floating-point value 4845llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 4846 return llvm::APFloat(ReadAPInt(Record, Idx)); 4847} 4848 4849// \brief Read a string 4850std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 4851 unsigned Len = Record[Idx++]; 4852 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 4853 Idx += Len; 4854 return Result; 4855} 4856 4857CXXTemporary *ASTReader::ReadCXXTemporary(const RecordData &Record, 4858 unsigned &Idx) { 4859 CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++])); 4860 return CXXTemporary::Create(*Context, Decl); 4861} 4862 4863DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 4864 return Diag(SourceLocation(), DiagID); 4865} 4866 4867DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 4868 return Diags.Report(Loc, DiagID); 4869} 4870 4871/// \brief Retrieve the identifier table associated with the 4872/// preprocessor. 4873IdentifierTable &ASTReader::getIdentifierTable() { 4874 assert(PP && "Forgot to set Preprocessor ?"); 4875 return PP->getIdentifierTable(); 4876} 4877 4878/// \brief Record that the given ID maps to the given switch-case 4879/// statement. 4880void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 4881 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 4882 SwitchCaseStmts[ID] = SC; 4883} 4884 4885/// \brief Retrieve the switch-case statement with the given ID. 4886SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 4887 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 4888 return SwitchCaseStmts[ID]; 4889} 4890 4891void ASTReader::ClearSwitchCaseIDs() { 4892 SwitchCaseStmts.clear(); 4893} 4894 4895void ASTReader::FinishedDeserializing() { 4896 assert(NumCurrentElementsDeserializing && 4897 "FinishedDeserializing not paired with StartedDeserializing"); 4898 if (NumCurrentElementsDeserializing == 1) { 4899 // If any identifiers with corresponding top-level declarations have 4900 // been loaded, load those declarations now. 4901 while (!PendingIdentifierInfos.empty()) { 4902 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 4903 PendingIdentifierInfos.front().DeclIDs, true); 4904 PendingIdentifierInfos.pop_front(); 4905 } 4906 4907 // Ready to load previous declarations of Decls that were delayed. 4908 while (!PendingPreviousDecls.empty()) { 4909 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 4910 PendingPreviousDecls.front().second); 4911 PendingPreviousDecls.pop_front(); 4912 } 4913 4914 // We are not in recursive loading, so it's safe to pass the "interesting" 4915 // decls to the consumer. 4916 if (Consumer) 4917 PassInterestingDeclsToConsumer(); 4918 4919 assert(PendingForwardRefs.size() == 0 && 4920 "Some forward refs did not get linked to the definition!"); 4921 } 4922 --NumCurrentElementsDeserializing; 4923} 4924 4925ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 4926 const char *isysroot, bool DisableValidation, 4927 bool DisableStatCache) 4928 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 4929 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 4930 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 4931 Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation), 4932 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4933 NumSLocEntriesRead(0), TotalNumSLocEntries(0), NextSLocOffset(0), 4934 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 4935 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 4936 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 4937 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 4938 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 4939 NumCurrentElementsDeserializing(0) 4940{ 4941 RelocatablePCH = false; 4942} 4943 4944ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 4945 Diagnostic &Diags, const char *isysroot, 4946 bool DisableValidation, bool DisableStatCache) 4947 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 4948 Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0), 4949 isysroot(isysroot), DisableValidation(DisableValidation), 4950 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4951 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 4952 NextSLocOffset(0), NumStatementsRead(0), TotalNumStatements(0), 4953 NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0), 4954 NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 4955 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 4956 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 4957 TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) { 4958 RelocatablePCH = false; 4959} 4960 4961ASTReader::~ASTReader() { 4962 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 4963 delete Chain[e - i - 1]; 4964 // Delete all visible decl lookup tables 4965 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 4966 E = DeclContextOffsets.end(); 4967 I != E; ++I) { 4968 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 4969 J != F; ++J) { 4970 if (J->NameLookupTableData) 4971 delete static_cast<ASTDeclContextNameLookupTable*>( 4972 J->NameLookupTableData); 4973 } 4974 } 4975 for (DeclContextVisibleUpdatesPending::iterator 4976 I = PendingVisibleUpdates.begin(), 4977 E = PendingVisibleUpdates.end(); 4978 I != E; ++I) { 4979 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 4980 F = I->second.end(); 4981 J != F; ++J) 4982 delete static_cast<ASTDeclContextNameLookupTable*>(*J); 4983 } 4984} 4985 4986ASTReader::PerFileData::PerFileData(ASTFileType Ty) 4987 : Type(Ty), SizeInBits(0), LocalNumSLocEntries(0), SLocOffsets(0), LocalSLocSize(0), 4988 LocalNumIdentifiers(0), IdentifierOffsets(0), IdentifierTableData(0), 4989 IdentifierLookupTable(0), LocalNumMacroDefinitions(0), 4990 MacroDefinitionOffsets(0), 4991 LocalNumHeaderFileInfos(0), HeaderFileInfoTableData(0), 4992 HeaderFileInfoTable(0), 4993 LocalNumSelectors(0), SelectorOffsets(0), 4994 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 4995 DeclOffsets(0), LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 4996 LocalNumTypes(0), TypeOffsets(0), StatCache(0), 4997 NumPreallocatedPreprocessingEntities(0), NextInSource(0) 4998{} 4999 5000ASTReader::PerFileData::~PerFileData() { 5001 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5002 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5003 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5004} 5005