ASTReader.cpp revision b0f4b9a558933b307073f7cd7753602f94354ae9
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 if (!ASTBuffers.empty()) { 2465 F.Buffer.reset(ASTBuffers.front()); 2466 ASTBuffers.pop_front(); 2467 assert(F.Buffer && "Passed null buffer"); 2468 } else { 2469 // Open the AST file. 2470 // 2471 // FIXME: This shouldn't be here, we should just take a raw_ostream. 2472 std::string ErrStr; 2473 llvm::error_code ec; 2474 if (FileName == "-") { 2475 ec = llvm::MemoryBuffer::getSTDIN(F.Buffer); 2476 if (ec) 2477 ErrStr = ec.message(); 2478 } else 2479 F.Buffer.reset(FileMgr.getBufferForFile(FileName, &ErrStr)); 2480 if (!F.Buffer) { 2481 Error(ErrStr.c_str()); 2482 return IgnorePCH; 2483 } 2484 } 2485 2486 // Initialize the stream 2487 F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), 2488 (const unsigned char *)F.Buffer->getBufferEnd()); 2489 llvm::BitstreamCursor &Stream = F.Stream; 2490 Stream.init(F.StreamFile); 2491 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2492 2493 // Sniff for the signature. 2494 if (Stream.Read(8) != 'C' || 2495 Stream.Read(8) != 'P' || 2496 Stream.Read(8) != 'C' || 2497 Stream.Read(8) != 'H') { 2498 Diag(diag::err_not_a_pch_file) << FileName; 2499 return Failure; 2500 } 2501 2502 while (!Stream.AtEndOfStream()) { 2503 unsigned Code = Stream.ReadCode(); 2504 2505 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2506 Error("invalid record at top-level of AST file"); 2507 return Failure; 2508 } 2509 2510 unsigned BlockID = Stream.ReadSubBlockID(); 2511 2512 // We only know the AST subblock ID. 2513 switch (BlockID) { 2514 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2515 if (Stream.ReadBlockInfoBlock()) { 2516 Error("malformed BlockInfoBlock in AST file"); 2517 return Failure; 2518 } 2519 break; 2520 case AST_BLOCK_ID: 2521 switch (ReadASTBlock(F)) { 2522 case Success: 2523 break; 2524 2525 case Failure: 2526 return Failure; 2527 2528 case IgnorePCH: 2529 // FIXME: We could consider reading through to the end of this 2530 // AST block, skipping subblocks, to see if there are other 2531 // AST blocks elsewhere. 2532 2533 // Clear out any preallocated source location entries, so that 2534 // the source manager does not try to resolve them later. 2535 SourceMgr.ClearPreallocatedSLocEntries(); 2536 2537 // Remove the stat cache. 2538 if (F.StatCache) 2539 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2540 2541 return IgnorePCH; 2542 } 2543 break; 2544 default: 2545 if (Stream.SkipBlock()) { 2546 Error("malformed block record in AST file"); 2547 return Failure; 2548 } 2549 break; 2550 } 2551 } 2552 2553 return Success; 2554} 2555 2556void ASTReader::setPreprocessor(Preprocessor &pp) { 2557 PP = &pp; 2558 2559 unsigned TotalNum = 0; 2560 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 2561 TotalNum += Chain[I]->NumPreallocatedPreprocessingEntities; 2562 if (TotalNum) { 2563 if (!PP->getPreprocessingRecord()) 2564 PP->createPreprocessingRecord(); 2565 PP->getPreprocessingRecord()->SetExternalSource(*this, TotalNum); 2566 } 2567} 2568 2569void ASTReader::InitializeContext(ASTContext &Ctx) { 2570 Context = &Ctx; 2571 assert(Context && "Passed null context!"); 2572 2573 assert(PP && "Forgot to set Preprocessor ?"); 2574 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2575 PP->getHeaderSearchInfo().SetExternalLookup(this); 2576 PP->setExternalSource(this); 2577 PP->getHeaderSearchInfo().SetExternalSource(this); 2578 2579 // If we have an update block for the TU waiting, we have to add it before 2580 // deserializing the decl. 2581 DeclContextOffsetsMap::iterator DCU = DeclContextOffsets.find(0); 2582 if (DCU != DeclContextOffsets.end()) { 2583 // Insertion could invalidate map, so grab vector. 2584 DeclContextInfos T; 2585 T.swap(DCU->second); 2586 DeclContextOffsets.erase(DCU); 2587 DeclContextOffsets[Ctx.getTranslationUnitDecl()].swap(T); 2588 } 2589 2590 // Load the translation unit declaration 2591 GetTranslationUnitDecl(); 2592 2593 // Load the special types. 2594 Context->setBuiltinVaListType( 2595 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2596 if (unsigned Id = SpecialTypes[SPECIAL_TYPE_OBJC_ID]) 2597 Context->setObjCIdType(GetType(Id)); 2598 if (unsigned Sel = SpecialTypes[SPECIAL_TYPE_OBJC_SELECTOR]) 2599 Context->setObjCSelType(GetType(Sel)); 2600 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) 2601 Context->setObjCProtoType(GetType(Proto)); 2602 if (unsigned Class = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS]) 2603 Context->setObjCClassType(GetType(Class)); 2604 2605 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) 2606 Context->setCFConstantStringType(GetType(String)); 2607 if (unsigned FastEnum 2608 = SpecialTypes[SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE]) 2609 Context->setObjCFastEnumerationStateType(GetType(FastEnum)); 2610 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2611 QualType FileType = GetType(File); 2612 if (FileType.isNull()) { 2613 Error("FILE type is NULL"); 2614 return; 2615 } 2616 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2617 Context->setFILEDecl(Typedef->getDecl()); 2618 else { 2619 const TagType *Tag = FileType->getAs<TagType>(); 2620 if (!Tag) { 2621 Error("Invalid FILE type in AST file"); 2622 return; 2623 } 2624 Context->setFILEDecl(Tag->getDecl()); 2625 } 2626 } 2627 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 2628 QualType Jmp_bufType = GetType(Jmp_buf); 2629 if (Jmp_bufType.isNull()) { 2630 Error("jmp_bug type is NULL"); 2631 return; 2632 } 2633 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 2634 Context->setjmp_bufDecl(Typedef->getDecl()); 2635 else { 2636 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 2637 if (!Tag) { 2638 Error("Invalid jmp_buf type in AST file"); 2639 return; 2640 } 2641 Context->setjmp_bufDecl(Tag->getDecl()); 2642 } 2643 } 2644 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 2645 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 2646 if (Sigjmp_bufType.isNull()) { 2647 Error("sigjmp_buf type is NULL"); 2648 return; 2649 } 2650 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 2651 Context->setsigjmp_bufDecl(Typedef->getDecl()); 2652 else { 2653 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 2654 assert(Tag && "Invalid sigjmp_buf type in AST file"); 2655 Context->setsigjmp_bufDecl(Tag->getDecl()); 2656 } 2657 } 2658 if (unsigned ObjCIdRedef 2659 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) 2660 Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); 2661 if (unsigned ObjCClassRedef 2662 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) 2663 Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); 2664 if (unsigned String = SpecialTypes[SPECIAL_TYPE_BLOCK_DESCRIPTOR]) 2665 Context->setBlockDescriptorType(GetType(String)); 2666 if (unsigned String 2667 = SpecialTypes[SPECIAL_TYPE_BLOCK_EXTENDED_DESCRIPTOR]) 2668 Context->setBlockDescriptorExtendedType(GetType(String)); 2669 if (unsigned ObjCSelRedef 2670 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) 2671 Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); 2672 if (unsigned String = SpecialTypes[SPECIAL_TYPE_NS_CONSTANT_STRING]) 2673 Context->setNSConstantStringType(GetType(String)); 2674 2675 if (SpecialTypes[SPECIAL_TYPE_INT128_INSTALLED]) 2676 Context->setInt128Installed(); 2677 2678 ReadPragmaDiagnosticMappings(Context->getDiagnostics()); 2679 2680 // If there were any CUDA special declarations, deserialize them. 2681 if (!CUDASpecialDeclRefs.empty()) { 2682 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 2683 Context->setcudaConfigureCallDecl( 2684 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 2685 } 2686} 2687 2688/// \brief Retrieve the name of the original source file name 2689/// directly from the AST file, without actually loading the AST 2690/// file. 2691std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 2692 FileManager &FileMgr, 2693 Diagnostic &Diags) { 2694 // Open the AST file. 2695 std::string ErrStr; 2696 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 2697 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 2698 if (!Buffer) { 2699 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 2700 return std::string(); 2701 } 2702 2703 // Initialize the stream 2704 llvm::BitstreamReader StreamFile; 2705 llvm::BitstreamCursor Stream; 2706 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 2707 (const unsigned char *)Buffer->getBufferEnd()); 2708 Stream.init(StreamFile); 2709 2710 // Sniff for the signature. 2711 if (Stream.Read(8) != 'C' || 2712 Stream.Read(8) != 'P' || 2713 Stream.Read(8) != 'C' || 2714 Stream.Read(8) != 'H') { 2715 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 2716 return std::string(); 2717 } 2718 2719 RecordData Record; 2720 while (!Stream.AtEndOfStream()) { 2721 unsigned Code = Stream.ReadCode(); 2722 2723 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 2724 unsigned BlockID = Stream.ReadSubBlockID(); 2725 2726 // We only know the AST subblock ID. 2727 switch (BlockID) { 2728 case AST_BLOCK_ID: 2729 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 2730 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2731 return std::string(); 2732 } 2733 break; 2734 2735 default: 2736 if (Stream.SkipBlock()) { 2737 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 2738 return std::string(); 2739 } 2740 break; 2741 } 2742 continue; 2743 } 2744 2745 if (Code == llvm::bitc::END_BLOCK) { 2746 if (Stream.ReadBlockEnd()) { 2747 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 2748 return std::string(); 2749 } 2750 continue; 2751 } 2752 2753 if (Code == llvm::bitc::DEFINE_ABBREV) { 2754 Stream.ReadAbbrevRecord(); 2755 continue; 2756 } 2757 2758 Record.clear(); 2759 const char *BlobStart = 0; 2760 unsigned BlobLen = 0; 2761 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 2762 == ORIGINAL_FILE_NAME) 2763 return std::string(BlobStart, BlobLen); 2764 } 2765 2766 return std::string(); 2767} 2768 2769/// \brief Parse the record that corresponds to a LangOptions data 2770/// structure. 2771/// 2772/// This routine parses the language options from the AST file and then gives 2773/// them to the AST listener if one is set. 2774/// 2775/// \returns true if the listener deems the file unacceptable, false otherwise. 2776bool ASTReader::ParseLanguageOptions( 2777 const llvm::SmallVectorImpl<uint64_t> &Record) { 2778 if (Listener) { 2779 LangOptions LangOpts; 2780 2781 #define PARSE_LANGOPT(Option) \ 2782 LangOpts.Option = Record[Idx]; \ 2783 ++Idx 2784 2785 unsigned Idx = 0; 2786 PARSE_LANGOPT(Trigraphs); 2787 PARSE_LANGOPT(BCPLComment); 2788 PARSE_LANGOPT(DollarIdents); 2789 PARSE_LANGOPT(AsmPreprocessor); 2790 PARSE_LANGOPT(GNUMode); 2791 PARSE_LANGOPT(GNUKeywords); 2792 PARSE_LANGOPT(ImplicitInt); 2793 PARSE_LANGOPT(Digraphs); 2794 PARSE_LANGOPT(HexFloats); 2795 PARSE_LANGOPT(C99); 2796 PARSE_LANGOPT(Microsoft); 2797 PARSE_LANGOPT(CPlusPlus); 2798 PARSE_LANGOPT(CPlusPlus0x); 2799 PARSE_LANGOPT(CXXOperatorNames); 2800 PARSE_LANGOPT(ObjC1); 2801 PARSE_LANGOPT(ObjC2); 2802 PARSE_LANGOPT(ObjCNonFragileABI); 2803 PARSE_LANGOPT(ObjCNonFragileABI2); 2804 PARSE_LANGOPT(AppleKext); 2805 PARSE_LANGOPT(ObjCDefaultSynthProperties); 2806 PARSE_LANGOPT(NoConstantCFStrings); 2807 PARSE_LANGOPT(PascalStrings); 2808 PARSE_LANGOPT(WritableStrings); 2809 PARSE_LANGOPT(LaxVectorConversions); 2810 PARSE_LANGOPT(AltiVec); 2811 PARSE_LANGOPT(Exceptions); 2812 PARSE_LANGOPT(ObjCExceptions); 2813 PARSE_LANGOPT(CXXExceptions); 2814 PARSE_LANGOPT(SjLjExceptions); 2815 PARSE_LANGOPT(MSBitfields); 2816 PARSE_LANGOPT(NeXTRuntime); 2817 PARSE_LANGOPT(Freestanding); 2818 PARSE_LANGOPT(NoBuiltin); 2819 PARSE_LANGOPT(ThreadsafeStatics); 2820 PARSE_LANGOPT(POSIXThreads); 2821 PARSE_LANGOPT(Blocks); 2822 PARSE_LANGOPT(EmitAllDecls); 2823 PARSE_LANGOPT(MathErrno); 2824 LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) 2825 Record[Idx++]); 2826 PARSE_LANGOPT(HeinousExtensions); 2827 PARSE_LANGOPT(Optimize); 2828 PARSE_LANGOPT(OptimizeSize); 2829 PARSE_LANGOPT(Static); 2830 PARSE_LANGOPT(PICLevel); 2831 PARSE_LANGOPT(GNUInline); 2832 PARSE_LANGOPT(NoInline); 2833 PARSE_LANGOPT(AccessControl); 2834 PARSE_LANGOPT(CharIsSigned); 2835 PARSE_LANGOPT(ShortWChar); 2836 PARSE_LANGOPT(ShortEnums); 2837 LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); 2838 LangOpts.setVisibilityMode((Visibility)Record[Idx++]); 2839 LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) 2840 Record[Idx++]); 2841 PARSE_LANGOPT(InstantiationDepth); 2842 PARSE_LANGOPT(OpenCL); 2843 PARSE_LANGOPT(CUDA); 2844 PARSE_LANGOPT(CatchUndefined); 2845 PARSE_LANGOPT(DefaultFPContract); 2846 PARSE_LANGOPT(ElideConstructors); 2847 PARSE_LANGOPT(SpellChecking); 2848 PARSE_LANGOPT(MRTD); 2849 #undef PARSE_LANGOPT 2850 2851 return Listener->ReadLanguageOptions(LangOpts); 2852 } 2853 2854 return false; 2855} 2856 2857void ASTReader::ReadPreprocessedEntities() { 2858 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2859 PerFileData &F = *Chain[I]; 2860 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 2861 continue; 2862 2863 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 2864 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 2865 while (LoadPreprocessedEntity(F)) { } 2866 } 2867} 2868 2869PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 2870 PerFileData *F = 0; 2871 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2872 if (Offset < Chain[I]->SizeInBits) { 2873 F = Chain[I]; 2874 break; 2875 } 2876 2877 Offset -= Chain[I]->SizeInBits; 2878 } 2879 2880 if (!F) { 2881 Error("Malformed preprocessed entity offset"); 2882 return 0; 2883 } 2884 2885 // Keep track of where we are in the stream, then jump back there 2886 // after reading this entity. 2887 SavedStreamPosition SavedPosition(F->PreprocessorDetailCursor); 2888 F->PreprocessorDetailCursor.JumpToBit(Offset); 2889 return LoadPreprocessedEntity(*F); 2890} 2891 2892HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 2893 HeaderFileInfoTrait Trait(FE->getName()); 2894 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2895 PerFileData &F = *Chain[I]; 2896 HeaderFileInfoLookupTable *Table 2897 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 2898 if (!Table) 2899 continue; 2900 2901 // Look in the on-disk hash table for an entry for this file name. 2902 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 2903 &Trait); 2904 if (Pos == Table->end()) 2905 continue; 2906 2907 HeaderFileInfo HFI = *Pos; 2908 if (Listener) 2909 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 2910 2911 return HFI; 2912 } 2913 2914 return HeaderFileInfo(); 2915} 2916 2917void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 2918 unsigned Idx = 0; 2919 while (Idx < PragmaDiagMappings.size()) { 2920 SourceLocation 2921 Loc = SourceLocation::getFromRawEncoding(PragmaDiagMappings[Idx++]); 2922 while (1) { 2923 assert(Idx < PragmaDiagMappings.size() && 2924 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 2925 if (Idx >= PragmaDiagMappings.size()) 2926 break; // Something is messed up but at least avoid infinite loop in 2927 // release build. 2928 unsigned DiagID = PragmaDiagMappings[Idx++]; 2929 if (DiagID == (unsigned)-1) 2930 break; // no more diag/map pairs for this location. 2931 diag::Mapping Map = (diag::Mapping)PragmaDiagMappings[Idx++]; 2932 Diag.setDiagnosticMapping(DiagID, Map, Loc); 2933 } 2934 } 2935} 2936 2937/// \brief Get the correct cursor and offset for loading a type. 2938ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 2939 PerFileData *F = 0; 2940 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 2941 F = Chain[N - I - 1]; 2942 if (Index < F->LocalNumTypes) 2943 break; 2944 Index -= F->LocalNumTypes; 2945 } 2946 assert(F && F->LocalNumTypes > Index && "Broken chain"); 2947 return RecordLocation(F, F->TypeOffsets[Index]); 2948} 2949 2950/// \brief Read and return the type with the given index.. 2951/// 2952/// The index is the type ID, shifted and minus the number of predefs. This 2953/// routine actually reads the record corresponding to the type at the given 2954/// location. It is a helper routine for GetType, which deals with reading type 2955/// IDs. 2956QualType ASTReader::ReadTypeRecord(unsigned Index) { 2957 RecordLocation Loc = TypeCursorForIndex(Index); 2958 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 2959 2960 // Keep track of where we are in the stream, then jump back there 2961 // after reading this type. 2962 SavedStreamPosition SavedPosition(DeclsCursor); 2963 2964 ReadingKindTracker ReadingKind(Read_Type, *this); 2965 2966 // Note that we are loading a type record. 2967 Deserializing AType(this); 2968 2969 DeclsCursor.JumpToBit(Loc.Offset); 2970 RecordData Record; 2971 unsigned Code = DeclsCursor.ReadCode(); 2972 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 2973 case TYPE_EXT_QUAL: { 2974 if (Record.size() != 2) { 2975 Error("Incorrect encoding of extended qualifier type"); 2976 return QualType(); 2977 } 2978 QualType Base = GetType(Record[0]); 2979 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]); 2980 return Context->getQualifiedType(Base, Quals); 2981 } 2982 2983 case TYPE_COMPLEX: { 2984 if (Record.size() != 1) { 2985 Error("Incorrect encoding of complex type"); 2986 return QualType(); 2987 } 2988 QualType ElemType = GetType(Record[0]); 2989 return Context->getComplexType(ElemType); 2990 } 2991 2992 case TYPE_POINTER: { 2993 if (Record.size() != 1) { 2994 Error("Incorrect encoding of pointer type"); 2995 return QualType(); 2996 } 2997 QualType PointeeType = GetType(Record[0]); 2998 return Context->getPointerType(PointeeType); 2999 } 3000 3001 case TYPE_BLOCK_POINTER: { 3002 if (Record.size() != 1) { 3003 Error("Incorrect encoding of block pointer type"); 3004 return QualType(); 3005 } 3006 QualType PointeeType = GetType(Record[0]); 3007 return Context->getBlockPointerType(PointeeType); 3008 } 3009 3010 case TYPE_LVALUE_REFERENCE: { 3011 if (Record.size() != 1) { 3012 Error("Incorrect encoding of lvalue reference type"); 3013 return QualType(); 3014 } 3015 QualType PointeeType = GetType(Record[0]); 3016 return Context->getLValueReferenceType(PointeeType); 3017 } 3018 3019 case TYPE_RVALUE_REFERENCE: { 3020 if (Record.size() != 1) { 3021 Error("Incorrect encoding of rvalue reference type"); 3022 return QualType(); 3023 } 3024 QualType PointeeType = GetType(Record[0]); 3025 return Context->getRValueReferenceType(PointeeType); 3026 } 3027 3028 case TYPE_MEMBER_POINTER: { 3029 if (Record.size() != 2) { 3030 Error("Incorrect encoding of member pointer type"); 3031 return QualType(); 3032 } 3033 QualType PointeeType = GetType(Record[0]); 3034 QualType ClassType = GetType(Record[1]); 3035 if (PointeeType.isNull() || ClassType.isNull()) 3036 return QualType(); 3037 3038 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3039 } 3040 3041 case TYPE_CONSTANT_ARRAY: { 3042 QualType ElementType = GetType(Record[0]); 3043 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3044 unsigned IndexTypeQuals = Record[2]; 3045 unsigned Idx = 3; 3046 llvm::APInt Size = ReadAPInt(Record, Idx); 3047 return Context->getConstantArrayType(ElementType, Size, 3048 ASM, IndexTypeQuals); 3049 } 3050 3051 case TYPE_INCOMPLETE_ARRAY: { 3052 QualType ElementType = GetType(Record[0]); 3053 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3054 unsigned IndexTypeQuals = Record[2]; 3055 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3056 } 3057 3058 case TYPE_VARIABLE_ARRAY: { 3059 QualType ElementType = GetType(Record[0]); 3060 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3061 unsigned IndexTypeQuals = Record[2]; 3062 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3063 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3064 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3065 ASM, IndexTypeQuals, 3066 SourceRange(LBLoc, RBLoc)); 3067 } 3068 3069 case TYPE_VECTOR: { 3070 if (Record.size() != 3) { 3071 Error("incorrect encoding of vector type in AST file"); 3072 return QualType(); 3073 } 3074 3075 QualType ElementType = GetType(Record[0]); 3076 unsigned NumElements = Record[1]; 3077 unsigned VecKind = Record[2]; 3078 return Context->getVectorType(ElementType, NumElements, 3079 (VectorType::VectorKind)VecKind); 3080 } 3081 3082 case TYPE_EXT_VECTOR: { 3083 if (Record.size() != 3) { 3084 Error("incorrect encoding of extended vector type in AST file"); 3085 return QualType(); 3086 } 3087 3088 QualType ElementType = GetType(Record[0]); 3089 unsigned NumElements = Record[1]; 3090 return Context->getExtVectorType(ElementType, NumElements); 3091 } 3092 3093 case TYPE_FUNCTION_NO_PROTO: { 3094 if (Record.size() != 4) { 3095 Error("incorrect encoding of no-proto function type"); 3096 return QualType(); 3097 } 3098 QualType ResultType = GetType(Record[0]); 3099 FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]); 3100 return Context->getFunctionNoProtoType(ResultType, Info); 3101 } 3102 3103 case TYPE_FUNCTION_PROTO: { 3104 QualType ResultType = GetType(Record[0]); 3105 3106 FunctionProtoType::ExtProtoInfo EPI; 3107 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3108 /*regparm*/ Record[2], 3109 static_cast<CallingConv>(Record[3])); 3110 3111 unsigned Idx = 4; 3112 unsigned NumParams = Record[Idx++]; 3113 llvm::SmallVector<QualType, 16> ParamTypes; 3114 for (unsigned I = 0; I != NumParams; ++I) 3115 ParamTypes.push_back(GetType(Record[Idx++])); 3116 3117 EPI.Variadic = Record[Idx++]; 3118 EPI.TypeQuals = Record[Idx++]; 3119 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3120 bool HasExceptionSpec = Record[Idx++]; 3121 bool HasAnyExceptionSpec = Record[Idx++]; 3122 EPI.ExceptionSpecType = HasExceptionSpec ? 3123 (HasAnyExceptionSpec ? EST_DynamicAny : EST_Dynamic) : EST_None; 3124 EPI.NumExceptions = Record[Idx++]; 3125 llvm::SmallVector<QualType, 2> Exceptions; 3126 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3127 Exceptions.push_back(GetType(Record[Idx++])); 3128 EPI.Exceptions = Exceptions.data(); 3129 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3130 EPI); 3131 } 3132 3133 case TYPE_UNRESOLVED_USING: 3134 return Context->getTypeDeclType( 3135 cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0]))); 3136 3137 case TYPE_TYPEDEF: { 3138 if (Record.size() != 2) { 3139 Error("incorrect encoding of typedef type"); 3140 return QualType(); 3141 } 3142 TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0])); 3143 QualType Canonical = GetType(Record[1]); 3144 if (!Canonical.isNull()) 3145 Canonical = Context->getCanonicalType(Canonical); 3146 return Context->getTypedefType(Decl, Canonical); 3147 } 3148 3149 case TYPE_TYPEOF_EXPR: 3150 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3151 3152 case TYPE_TYPEOF: { 3153 if (Record.size() != 1) { 3154 Error("incorrect encoding of typeof(type) in AST file"); 3155 return QualType(); 3156 } 3157 QualType UnderlyingType = GetType(Record[0]); 3158 return Context->getTypeOfType(UnderlyingType); 3159 } 3160 3161 case TYPE_DECLTYPE: 3162 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3163 3164 case TYPE_AUTO: 3165 return Context->getAutoType(GetType(Record[0])); 3166 3167 case TYPE_RECORD: { 3168 if (Record.size() != 2) { 3169 Error("incorrect encoding of record type"); 3170 return QualType(); 3171 } 3172 bool IsDependent = Record[0]; 3173 QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1]))); 3174 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3175 return T; 3176 } 3177 3178 case TYPE_ENUM: { 3179 if (Record.size() != 2) { 3180 Error("incorrect encoding of enum type"); 3181 return QualType(); 3182 } 3183 bool IsDependent = Record[0]; 3184 QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1]))); 3185 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3186 return T; 3187 } 3188 3189 case TYPE_ATTRIBUTED: { 3190 if (Record.size() != 3) { 3191 Error("incorrect encoding of attributed type"); 3192 return QualType(); 3193 } 3194 QualType modifiedType = GetType(Record[0]); 3195 QualType equivalentType = GetType(Record[1]); 3196 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3197 return Context->getAttributedType(kind, modifiedType, equivalentType); 3198 } 3199 3200 case TYPE_PAREN: { 3201 if (Record.size() != 1) { 3202 Error("incorrect encoding of paren type"); 3203 return QualType(); 3204 } 3205 QualType InnerType = GetType(Record[0]); 3206 return Context->getParenType(InnerType); 3207 } 3208 3209 case TYPE_PACK_EXPANSION: { 3210 if (Record.size() != 2) { 3211 Error("incorrect encoding of pack expansion type"); 3212 return QualType(); 3213 } 3214 QualType Pattern = GetType(Record[0]); 3215 if (Pattern.isNull()) 3216 return QualType(); 3217 llvm::Optional<unsigned> NumExpansions; 3218 if (Record[1]) 3219 NumExpansions = Record[1] - 1; 3220 return Context->getPackExpansionType(Pattern, NumExpansions); 3221 } 3222 3223 case TYPE_ELABORATED: { 3224 unsigned Idx = 0; 3225 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3226 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3227 QualType NamedType = GetType(Record[Idx++]); 3228 return Context->getElaboratedType(Keyword, NNS, NamedType); 3229 } 3230 3231 case TYPE_OBJC_INTERFACE: { 3232 unsigned Idx = 0; 3233 ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++])); 3234 return Context->getObjCInterfaceType(ItfD); 3235 } 3236 3237 case TYPE_OBJC_OBJECT: { 3238 unsigned Idx = 0; 3239 QualType Base = GetType(Record[Idx++]); 3240 unsigned NumProtos = Record[Idx++]; 3241 llvm::SmallVector<ObjCProtocolDecl*, 4> Protos; 3242 for (unsigned I = 0; I != NumProtos; ++I) 3243 Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++]))); 3244 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3245 } 3246 3247 case TYPE_OBJC_OBJECT_POINTER: { 3248 unsigned Idx = 0; 3249 QualType Pointee = GetType(Record[Idx++]); 3250 return Context->getObjCObjectPointerType(Pointee); 3251 } 3252 3253 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3254 unsigned Idx = 0; 3255 QualType Parm = GetType(Record[Idx++]); 3256 QualType Replacement = GetType(Record[Idx++]); 3257 return 3258 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3259 Replacement); 3260 } 3261 3262 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3263 unsigned Idx = 0; 3264 QualType Parm = GetType(Record[Idx++]); 3265 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3266 return Context->getSubstTemplateTypeParmPackType( 3267 cast<TemplateTypeParmType>(Parm), 3268 ArgPack); 3269 } 3270 3271 case TYPE_INJECTED_CLASS_NAME: { 3272 CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0])); 3273 QualType TST = GetType(Record[1]); // probably derivable 3274 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3275 // for AST reading, too much interdependencies. 3276 return 3277 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3278 } 3279 3280 case TYPE_TEMPLATE_TYPE_PARM: { 3281 unsigned Idx = 0; 3282 unsigned Depth = Record[Idx++]; 3283 unsigned Index = Record[Idx++]; 3284 bool Pack = Record[Idx++]; 3285 IdentifierInfo *Name = GetIdentifierInfo(Record, Idx); 3286 return Context->getTemplateTypeParmType(Depth, Index, Pack, Name); 3287 } 3288 3289 case TYPE_DEPENDENT_NAME: { 3290 unsigned Idx = 0; 3291 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3292 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3293 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3294 QualType Canon = GetType(Record[Idx++]); 3295 if (!Canon.isNull()) 3296 Canon = Context->getCanonicalType(Canon); 3297 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3298 } 3299 3300 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3301 unsigned Idx = 0; 3302 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3303 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 3304 const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); 3305 unsigned NumArgs = Record[Idx++]; 3306 llvm::SmallVector<TemplateArgument, 8> Args; 3307 Args.reserve(NumArgs); 3308 while (NumArgs--) 3309 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3310 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3311 Args.size(), Args.data()); 3312 } 3313 3314 case TYPE_DEPENDENT_SIZED_ARRAY: { 3315 unsigned Idx = 0; 3316 3317 // ArrayType 3318 QualType ElementType = GetType(Record[Idx++]); 3319 ArrayType::ArraySizeModifier ASM 3320 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3321 unsigned IndexTypeQuals = Record[Idx++]; 3322 3323 // DependentSizedArrayType 3324 Expr *NumElts = ReadExpr(*Loc.F); 3325 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3326 3327 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3328 IndexTypeQuals, Brackets); 3329 } 3330 3331 case TYPE_TEMPLATE_SPECIALIZATION: { 3332 unsigned Idx = 0; 3333 bool IsDependent = Record[Idx++]; 3334 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3335 llvm::SmallVector<TemplateArgument, 8> Args; 3336 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3337 QualType Canon = GetType(Record[Idx++]); 3338 QualType T; 3339 if (Canon.isNull()) 3340 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3341 Args.size()); 3342 else 3343 T = Context->getTemplateSpecializationType(Name, Args.data(), 3344 Args.size(), Canon); 3345 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3346 return T; 3347 } 3348 } 3349 // Suppress a GCC warning 3350 return QualType(); 3351} 3352 3353class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3354 ASTReader &Reader; 3355 ASTReader::PerFileData &F; 3356 llvm::BitstreamCursor &DeclsCursor; 3357 const ASTReader::RecordData &Record; 3358 unsigned &Idx; 3359 3360 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3361 unsigned &I) { 3362 return Reader.ReadSourceLocation(F, R, I); 3363 } 3364 3365public: 3366 TypeLocReader(ASTReader &Reader, ASTReader::PerFileData &F, 3367 const ASTReader::RecordData &Record, unsigned &Idx) 3368 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3369 { } 3370 3371 // We want compile-time assurance that we've enumerated all of 3372 // these, so unfortunately we have to declare them first, then 3373 // define them out-of-line. 3374#define ABSTRACT_TYPELOC(CLASS, PARENT) 3375#define TYPELOC(CLASS, PARENT) \ 3376 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3377#include "clang/AST/TypeLocNodes.def" 3378 3379 void VisitFunctionTypeLoc(FunctionTypeLoc); 3380 void VisitArrayTypeLoc(ArrayTypeLoc); 3381}; 3382 3383void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3384 // nothing to do 3385} 3386void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3387 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3388 if (TL.needsExtraLocalData()) { 3389 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3390 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3391 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3392 TL.setModeAttr(Record[Idx++]); 3393 } 3394} 3395void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3396 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3397} 3398void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3399 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3400} 3401void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3402 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3403} 3404void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3405 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3406} 3407void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3408 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3409} 3410void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3411 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3412 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3413} 3414void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3415 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3416 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3417 if (Record[Idx++]) 3418 TL.setSizeExpr(Reader.ReadExpr(F)); 3419 else 3420 TL.setSizeExpr(0); 3421} 3422void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3423 VisitArrayTypeLoc(TL); 3424} 3425void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3426 VisitArrayTypeLoc(TL); 3427} 3428void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3429 VisitArrayTypeLoc(TL); 3430} 3431void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3432 DependentSizedArrayTypeLoc TL) { 3433 VisitArrayTypeLoc(TL); 3434} 3435void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3436 DependentSizedExtVectorTypeLoc TL) { 3437 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3438} 3439void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3440 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3441} 3442void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3443 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3444} 3445void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3446 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3447 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3448 TL.setTrailingReturn(Record[Idx++]); 3449 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3450 TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++]))); 3451 } 3452} 3453void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3454 VisitFunctionTypeLoc(TL); 3455} 3456void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3457 VisitFunctionTypeLoc(TL); 3458} 3459void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3460 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3461} 3462void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3463 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3464} 3465void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3466 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3467 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3468 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3469} 3470void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3471 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3472 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3473 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3474 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3475} 3476void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3477 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3478} 3479void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3480 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3481} 3482void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3483 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3484} 3485void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3486 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3487} 3488void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3489 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3490 if (TL.hasAttrOperand()) { 3491 SourceRange range; 3492 range.setBegin(ReadSourceLocation(Record, Idx)); 3493 range.setEnd(ReadSourceLocation(Record, Idx)); 3494 TL.setAttrOperandParensRange(range); 3495 } 3496 if (TL.hasAttrExprOperand()) { 3497 if (Record[Idx++]) 3498 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3499 else 3500 TL.setAttrExprOperand(0); 3501 } else if (TL.hasAttrEnumOperand()) 3502 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3503} 3504void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3505 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3506} 3507void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3508 SubstTemplateTypeParmTypeLoc TL) { 3509 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3510} 3511void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3512 SubstTemplateTypeParmPackTypeLoc TL) { 3513 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3514} 3515void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3516 TemplateSpecializationTypeLoc TL) { 3517 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3518 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3519 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3520 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3521 TL.setArgLocInfo(i, 3522 Reader.GetTemplateArgumentLocInfo(F, 3523 TL.getTypePtr()->getArg(i).getKind(), 3524 Record, Idx)); 3525} 3526void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3527 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3528 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3529} 3530void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3531 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3532 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3533} 3534void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3535 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3536} 3537void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3538 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3539 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3540 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3541} 3542void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3543 DependentTemplateSpecializationTypeLoc TL) { 3544 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3545 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3546 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3547 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3548 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3549 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3550 TL.setArgLocInfo(I, 3551 Reader.GetTemplateArgumentLocInfo(F, 3552 TL.getTypePtr()->getArg(I).getKind(), 3553 Record, Idx)); 3554} 3555void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3556 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3557} 3558void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3559 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3560} 3561void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3562 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3563 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3564 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3565 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3566 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3567} 3568void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3569 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3570} 3571 3572TypeSourceInfo *ASTReader::GetTypeSourceInfo(PerFileData &F, 3573 const RecordData &Record, 3574 unsigned &Idx) { 3575 QualType InfoTy = GetType(Record[Idx++]); 3576 if (InfoTy.isNull()) 3577 return 0; 3578 3579 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3580 TypeLocReader TLR(*this, F, Record, Idx); 3581 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3582 TLR.Visit(TL); 3583 return TInfo; 3584} 3585 3586QualType ASTReader::GetType(TypeID ID) { 3587 unsigned FastQuals = ID & Qualifiers::FastMask; 3588 unsigned Index = ID >> Qualifiers::FastWidth; 3589 3590 if (Index < NUM_PREDEF_TYPE_IDS) { 3591 QualType T; 3592 switch ((PredefinedTypeIDs)Index) { 3593 case PREDEF_TYPE_NULL_ID: return QualType(); 3594 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3595 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3596 3597 case PREDEF_TYPE_CHAR_U_ID: 3598 case PREDEF_TYPE_CHAR_S_ID: 3599 // FIXME: Check that the signedness of CharTy is correct! 3600 T = Context->CharTy; 3601 break; 3602 3603 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3604 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3605 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3606 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3607 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 3608 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 3609 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 3610 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 3611 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 3612 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 3613 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 3614 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 3615 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 3616 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 3617 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 3618 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 3619 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 3620 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 3621 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 3622 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 3623 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 3624 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 3625 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 3626 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 3627 } 3628 3629 assert(!T.isNull() && "Unknown predefined type"); 3630 return T.withFastQualifiers(FastQuals); 3631 } 3632 3633 Index -= NUM_PREDEF_TYPE_IDS; 3634 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 3635 if (TypesLoaded[Index].isNull()) { 3636 TypesLoaded[Index] = ReadTypeRecord(Index); 3637 if (TypesLoaded[Index].isNull()) 3638 return QualType(); 3639 3640 TypesLoaded[Index]->setFromAST(); 3641 TypeIdxs[TypesLoaded[Index]] = TypeIdx::fromTypeID(ID); 3642 if (DeserializationListener) 3643 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 3644 TypesLoaded[Index]); 3645 } 3646 3647 return TypesLoaded[Index].withFastQualifiers(FastQuals); 3648} 3649 3650TypeID ASTReader::GetTypeID(QualType T) const { 3651 return MakeTypeID(T, 3652 std::bind1st(std::mem_fun(&ASTReader::GetTypeIdx), this)); 3653} 3654 3655TypeIdx ASTReader::GetTypeIdx(QualType T) const { 3656 if (T.isNull()) 3657 return TypeIdx(); 3658 assert(!T.getLocalFastQualifiers()); 3659 3660 TypeIdxMap::const_iterator I = TypeIdxs.find(T); 3661 // GetTypeIdx is mostly used for computing the hash of DeclarationNames and 3662 // comparing keys of ASTDeclContextNameLookupTable. 3663 // If the type didn't come from the AST file use a specially marked index 3664 // so that any hash/key comparison fail since no such index is stored 3665 // in a AST file. 3666 if (I == TypeIdxs.end()) 3667 return TypeIdx(-1); 3668 return I->second; 3669} 3670 3671unsigned ASTReader::getTotalNumCXXBaseSpecifiers() const { 3672 unsigned Result = 0; 3673 for (unsigned I = 0, N = Chain.size(); I != N; ++I) 3674 Result += Chain[I]->LocalNumCXXBaseSpecifiers; 3675 3676 return Result; 3677} 3678 3679TemplateArgumentLocInfo 3680ASTReader::GetTemplateArgumentLocInfo(PerFileData &F, 3681 TemplateArgument::ArgKind Kind, 3682 const RecordData &Record, 3683 unsigned &Index) { 3684 switch (Kind) { 3685 case TemplateArgument::Expression: 3686 return ReadExpr(F); 3687 case TemplateArgument::Type: 3688 return GetTypeSourceInfo(F, Record, Index); 3689 case TemplateArgument::Template: { 3690 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 3691 Index); 3692 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3693 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 3694 SourceLocation()); 3695 } 3696 case TemplateArgument::TemplateExpansion: { 3697 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 3698 Index); 3699 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 3700 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 3701 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 3702 EllipsisLoc); 3703 } 3704 case TemplateArgument::Null: 3705 case TemplateArgument::Integral: 3706 case TemplateArgument::Declaration: 3707 case TemplateArgument::Pack: 3708 return TemplateArgumentLocInfo(); 3709 } 3710 llvm_unreachable("unexpected template argument loc"); 3711 return TemplateArgumentLocInfo(); 3712} 3713 3714TemplateArgumentLoc 3715ASTReader::ReadTemplateArgumentLoc(PerFileData &F, 3716 const RecordData &Record, unsigned &Index) { 3717 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 3718 3719 if (Arg.getKind() == TemplateArgument::Expression) { 3720 if (Record[Index++]) // bool InfoHasSameExpr. 3721 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 3722 } 3723 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 3724 Record, Index)); 3725} 3726 3727Decl *ASTReader::GetExternalDecl(uint32_t ID) { 3728 return GetDecl(ID); 3729} 3730 3731uint64_t 3732ASTReader::GetCXXBaseSpecifiersOffset(serialization::CXXBaseSpecifiersID ID) { 3733 if (ID == 0) 3734 return 0; 3735 3736 --ID; 3737 uint64_t Offset = 0; 3738 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3739 PerFileData &F = *Chain[N - I - 1]; 3740 3741 if (ID < F.LocalNumCXXBaseSpecifiers) 3742 return Offset + F.CXXBaseSpecifiersOffsets[ID]; 3743 3744 ID -= F.LocalNumCXXBaseSpecifiers; 3745 Offset += F.SizeInBits; 3746 } 3747 3748 assert(false && "CXXBaseSpecifiers not found"); 3749 return 0; 3750} 3751 3752CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 3753 // Figure out which AST file contains this offset. 3754 PerFileData *F = 0; 3755 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3756 if (Offset < Chain[N - I - 1]->SizeInBits) { 3757 F = Chain[N - I - 1]; 3758 break; 3759 } 3760 3761 Offset -= Chain[N - I - 1]->SizeInBits; 3762 } 3763 3764 if (!F) { 3765 Error("Malformed AST file: C++ base specifiers at impossible offset"); 3766 return 0; 3767 } 3768 3769 llvm::BitstreamCursor &Cursor = F->DeclsCursor; 3770 SavedStreamPosition SavedPosition(Cursor); 3771 Cursor.JumpToBit(Offset); 3772 ReadingKindTracker ReadingKind(Read_Decl, *this); 3773 RecordData Record; 3774 unsigned Code = Cursor.ReadCode(); 3775 unsigned RecCode = Cursor.ReadRecord(Code, Record); 3776 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 3777 Error("Malformed AST file: missing C++ base specifiers"); 3778 return 0; 3779 } 3780 3781 unsigned Idx = 0; 3782 unsigned NumBases = Record[Idx++]; 3783 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 3784 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 3785 for (unsigned I = 0; I != NumBases; ++I) 3786 Bases[I] = ReadCXXBaseSpecifier(*F, Record, Idx); 3787 return Bases; 3788} 3789 3790TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 3791 if (!DeclsLoaded[0]) { 3792 ReadDeclRecord(0, 1); 3793 if (DeserializationListener) 3794 DeserializationListener->DeclRead(1, DeclsLoaded[0]); 3795 } 3796 3797 return cast<TranslationUnitDecl>(DeclsLoaded[0]); 3798} 3799 3800Decl *ASTReader::GetDecl(DeclID ID) { 3801 if (ID == 0) 3802 return 0; 3803 3804 if (ID > DeclsLoaded.size()) { 3805 Error("declaration ID out-of-range for AST file"); 3806 return 0; 3807 } 3808 3809 unsigned Index = ID - 1; 3810 if (!DeclsLoaded[Index]) { 3811 ReadDeclRecord(Index, ID); 3812 if (DeserializationListener) 3813 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 3814 } 3815 3816 return DeclsLoaded[Index]; 3817} 3818 3819/// \brief Resolve the offset of a statement into a statement. 3820/// 3821/// This operation will read a new statement from the external 3822/// source each time it is called, and is meant to be used via a 3823/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 3824Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 3825 // Switch case IDs are per Decl. 3826 ClearSwitchCaseIDs(); 3827 3828 // Offset here is a global offset across the entire chain. 3829 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 3830 PerFileData &F = *Chain[N - I - 1]; 3831 if (Offset < F.SizeInBits) { 3832 // Since we know that this statement is part of a decl, make sure to use 3833 // the decl cursor to read it. 3834 F.DeclsCursor.JumpToBit(Offset); 3835 return ReadStmtFromStream(F); 3836 } 3837 Offset -= F.SizeInBits; 3838 } 3839 llvm_unreachable("Broken chain"); 3840} 3841 3842bool ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 3843 bool (*isKindWeWant)(Decl::Kind), 3844 llvm::SmallVectorImpl<Decl*> &Decls) { 3845 assert(DC->hasExternalLexicalStorage() && 3846 "DeclContext has no lexical decls in storage"); 3847 3848 // There might be lexical decls in multiple parts of the chain, for the TU 3849 // at least. 3850 // DeclContextOffsets might reallocate as we load additional decls below, 3851 // so make a copy of the vector. 3852 DeclContextInfos Infos = DeclContextOffsets[DC]; 3853 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3854 I != E; ++I) { 3855 // IDs can be 0 if this context doesn't contain declarations. 3856 if (!I->LexicalDecls) 3857 continue; 3858 3859 // Load all of the declaration IDs 3860 for (const KindDeclIDPair *ID = I->LexicalDecls, 3861 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 3862 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 3863 continue; 3864 3865 Decl *D = GetDecl(ID->second); 3866 assert(D && "Null decl in lexical decls"); 3867 Decls.push_back(D); 3868 } 3869 } 3870 3871 ++NumLexicalDeclContextsRead; 3872 return false; 3873} 3874 3875DeclContext::lookup_result 3876ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 3877 DeclarationName Name) { 3878 assert(DC->hasExternalVisibleStorage() && 3879 "DeclContext has no visible decls in storage"); 3880 if (!Name) 3881 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 3882 DeclContext::lookup_iterator(0)); 3883 3884 llvm::SmallVector<NamedDecl *, 64> Decls; 3885 // There might be visible decls in multiple parts of the chain, for the TU 3886 // and namespaces. For any given name, the last available results replace 3887 // all earlier ones. For this reason, we walk in reverse. 3888 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3889 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 3890 I != E; ++I) { 3891 if (!I->NameLookupTableData) 3892 continue; 3893 3894 ASTDeclContextNameLookupTable *LookupTable = 3895 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3896 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 3897 if (Pos == LookupTable->end()) 3898 continue; 3899 3900 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 3901 for (; Data.first != Data.second; ++Data.first) 3902 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3903 break; 3904 } 3905 3906 ++NumVisibleDeclContextsRead; 3907 3908 SetExternalVisibleDeclsForName(DC, Name, Decls); 3909 return const_cast<DeclContext*>(DC)->lookup(Name); 3910} 3911 3912void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 3913 assert(DC->hasExternalVisibleStorage() && 3914 "DeclContext has no visible decls in storage"); 3915 3916 llvm::SmallVector<NamedDecl *, 64> Decls; 3917 // There might be visible decls in multiple parts of the chain, for the TU 3918 // and namespaces. 3919 DeclContextInfos &Infos = DeclContextOffsets[DC]; 3920 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 3921 I != E; ++I) { 3922 if (!I->NameLookupTableData) 3923 continue; 3924 3925 ASTDeclContextNameLookupTable *LookupTable = 3926 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 3927 for (ASTDeclContextNameLookupTable::item_iterator 3928 ItemI = LookupTable->item_begin(), 3929 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 3930 ASTDeclContextNameLookupTable::item_iterator::value_type Val 3931 = *ItemI; 3932 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 3933 Decls.clear(); 3934 for (; Data.first != Data.second; ++Data.first) 3935 Decls.push_back(cast<NamedDecl>(GetDecl(*Data.first))); 3936 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 3937 } 3938 } 3939} 3940 3941void ASTReader::PassInterestingDeclsToConsumer() { 3942 assert(Consumer); 3943 while (!InterestingDecls.empty()) { 3944 DeclGroupRef DG(InterestingDecls.front()); 3945 InterestingDecls.pop_front(); 3946 Consumer->HandleInterestingDecl(DG); 3947 } 3948} 3949 3950void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 3951 this->Consumer = Consumer; 3952 3953 if (!Consumer) 3954 return; 3955 3956 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 3957 // Force deserialization of this decl, which will cause it to be queued for 3958 // passing to the consumer. 3959 GetDecl(ExternalDefinitions[I]); 3960 } 3961 3962 PassInterestingDeclsToConsumer(); 3963} 3964 3965void ASTReader::PrintStats() { 3966 std::fprintf(stderr, "*** AST File Statistics:\n"); 3967 3968 unsigned NumTypesLoaded 3969 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 3970 QualType()); 3971 unsigned NumDeclsLoaded 3972 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 3973 (Decl *)0); 3974 unsigned NumIdentifiersLoaded 3975 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 3976 IdentifiersLoaded.end(), 3977 (IdentifierInfo *)0); 3978 unsigned NumSelectorsLoaded 3979 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 3980 SelectorsLoaded.end(), 3981 Selector()); 3982 3983 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 3984 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 3985 if (TotalNumSLocEntries) 3986 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 3987 NumSLocEntriesRead, TotalNumSLocEntries, 3988 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 3989 if (!TypesLoaded.empty()) 3990 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 3991 NumTypesLoaded, (unsigned)TypesLoaded.size(), 3992 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 3993 if (!DeclsLoaded.empty()) 3994 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 3995 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 3996 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 3997 if (!IdentifiersLoaded.empty()) 3998 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 3999 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4000 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4001 if (!SelectorsLoaded.empty()) 4002 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4003 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4004 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4005 if (TotalNumStatements) 4006 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4007 NumStatementsRead, TotalNumStatements, 4008 ((float)NumStatementsRead/TotalNumStatements * 100)); 4009 if (TotalNumMacros) 4010 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4011 NumMacrosRead, TotalNumMacros, 4012 ((float)NumMacrosRead/TotalNumMacros * 100)); 4013 if (TotalLexicalDeclContexts) 4014 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4015 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4016 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4017 * 100)); 4018 if (TotalVisibleDeclContexts) 4019 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4020 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4021 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4022 * 100)); 4023 if (TotalNumMethodPoolEntries) { 4024 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4025 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4026 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4027 * 100)); 4028 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4029 } 4030 std::fprintf(stderr, "\n"); 4031} 4032 4033void ASTReader::InitializeSema(Sema &S) { 4034 SemaObj = &S; 4035 S.ExternalSource = this; 4036 4037 // Makes sure any declarations that were deserialized "too early" 4038 // still get added to the identifier's declaration chains. 4039 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4040 if (SemaObj->TUScope) 4041 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4042 4043 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4044 } 4045 PreloadedDecls.clear(); 4046 4047 // If there were any tentative definitions, deserialize them and add 4048 // them to Sema's list of tentative definitions. 4049 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4050 VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I])); 4051 SemaObj->TentativeDefinitions.push_back(Var); 4052 } 4053 4054 // If there were any unused file scoped decls, deserialize them and add to 4055 // Sema's list of unused file scoped decls. 4056 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4057 DeclaratorDecl *D = cast<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4058 SemaObj->UnusedFileScopedDecls.push_back(D); 4059 } 4060 4061 // If there were any locally-scoped external declarations, 4062 // deserialize them and add them to Sema's table of locally-scoped 4063 // external declarations. 4064 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4065 NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4066 SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D; 4067 } 4068 4069 // If there were any ext_vector type declarations, deserialize them 4070 // and add them to Sema's vector of such declarations. 4071 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) 4072 SemaObj->ExtVectorDecls.push_back( 4073 cast<TypedefDecl>(GetDecl(ExtVectorDecls[I]))); 4074 4075 // FIXME: Do VTable uses and dynamic classes deserialize too much ? 4076 // Can we cut them down before writing them ? 4077 4078 // If there were any dynamic classes declarations, deserialize them 4079 // and add them to Sema's vector of such declarations. 4080 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) 4081 SemaObj->DynamicClasses.push_back( 4082 cast<CXXRecordDecl>(GetDecl(DynamicClasses[I]))); 4083 4084 // Load the offsets of the declarations that Sema references. 4085 // They will be lazily deserialized when needed. 4086 if (!SemaDeclRefs.empty()) { 4087 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4088 SemaObj->StdNamespace = SemaDeclRefs[0]; 4089 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4090 } 4091 4092 for (PerFileData *F = FirstInSource; F; F = F->NextInSource) { 4093 4094 // If there are @selector references added them to its pool. This is for 4095 // implementation of -Wselector. 4096 if (!F->ReferencedSelectorsData.empty()) { 4097 unsigned int DataSize = F->ReferencedSelectorsData.size()-1; 4098 unsigned I = 0; 4099 while (I < DataSize) { 4100 Selector Sel = DecodeSelector(F->ReferencedSelectorsData[I++]); 4101 SourceLocation SelLoc = ReadSourceLocation( 4102 *F, F->ReferencedSelectorsData, I); 4103 SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc)); 4104 } 4105 } 4106 4107 // If there were any pending implicit instantiations, deserialize them 4108 // and add them to Sema's queue of such instantiations. 4109 assert(F->PendingInstantiations.size() % 2 == 0 && 4110 "Expected pairs of entries"); 4111 for (unsigned Idx = 0, N = F->PendingInstantiations.size(); Idx < N;) { 4112 ValueDecl *D=cast<ValueDecl>(GetDecl(F->PendingInstantiations[Idx++])); 4113 SourceLocation Loc = ReadSourceLocation(*F, F->PendingInstantiations,Idx); 4114 SemaObj->PendingInstantiations.push_back(std::make_pair(D, Loc)); 4115 } 4116 } 4117 4118 // The two special data sets below always come from the most recent PCH, 4119 // which is at the front of the chain. 4120 PerFileData &F = *Chain.front(); 4121 4122 // If there were any weak undeclared identifiers, deserialize them and add to 4123 // Sema's list of weak undeclared identifiers. 4124 if (!WeakUndeclaredIdentifiers.empty()) { 4125 unsigned Idx = 0; 4126 for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) { 4127 IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4128 IdentifierInfo *AliasId= GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); 4129 SourceLocation Loc = ReadSourceLocation(F, WeakUndeclaredIdentifiers,Idx); 4130 bool Used = WeakUndeclaredIdentifiers[Idx++]; 4131 Sema::WeakInfo WI(AliasId, Loc); 4132 WI.setUsed(Used); 4133 SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI)); 4134 } 4135 } 4136 4137 // If there were any VTable uses, deserialize the information and add it 4138 // to Sema's vector and map of VTable uses. 4139 if (!VTableUses.empty()) { 4140 unsigned Idx = 0; 4141 for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) { 4142 CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4143 SourceLocation Loc = ReadSourceLocation(F, VTableUses, Idx); 4144 bool DefinitionRequired = VTableUses[Idx++]; 4145 SemaObj->VTableUses.push_back(std::make_pair(Class, Loc)); 4146 SemaObj->VTablesUsed[Class] = DefinitionRequired; 4147 } 4148 } 4149 4150 if (!FPPragmaOptions.empty()) { 4151 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4152 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4153 } 4154 4155 if (!OpenCLExtensions.empty()) { 4156 unsigned I = 0; 4157#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4158#include "clang/Basic/OpenCLExtensions.def" 4159 4160 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4161 } 4162} 4163 4164IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4165 // Try to find this name within our on-disk hash tables. We start with the 4166 // most recent one, since that one contains the most up-to-date info. 4167 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4168 ASTIdentifierLookupTable *IdTable 4169 = (ASTIdentifierLookupTable *)Chain[I]->IdentifierLookupTable; 4170 if (!IdTable) 4171 continue; 4172 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4173 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4174 if (Pos == IdTable->end()) 4175 continue; 4176 4177 // Dereferencing the iterator has the effect of building the 4178 // IdentifierInfo node and populating it with the various 4179 // declarations it needs. 4180 return *Pos; 4181 } 4182 return 0; 4183} 4184 4185namespace clang { 4186 /// \brief An identifier-lookup iterator that enumerates all of the 4187 /// identifiers stored within a set of AST files. 4188 class ASTIdentifierIterator : public IdentifierIterator { 4189 /// \brief The AST reader whose identifiers are being enumerated. 4190 const ASTReader &Reader; 4191 4192 /// \brief The current index into the chain of AST files stored in 4193 /// the AST reader. 4194 unsigned Index; 4195 4196 /// \brief The current position within the identifier lookup table 4197 /// of the current AST file. 4198 ASTIdentifierLookupTable::key_iterator Current; 4199 4200 /// \brief The end position within the identifier lookup table of 4201 /// the current AST file. 4202 ASTIdentifierLookupTable::key_iterator End; 4203 4204 public: 4205 explicit ASTIdentifierIterator(const ASTReader &Reader); 4206 4207 virtual llvm::StringRef Next(); 4208 }; 4209} 4210 4211ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4212 : Reader(Reader), Index(Reader.Chain.size() - 1) { 4213 ASTIdentifierLookupTable *IdTable 4214 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4215 Current = IdTable->key_begin(); 4216 End = IdTable->key_end(); 4217} 4218 4219llvm::StringRef ASTIdentifierIterator::Next() { 4220 while (Current == End) { 4221 // If we have exhausted all of our AST files, we're done. 4222 if (Index == 0) 4223 return llvm::StringRef(); 4224 4225 --Index; 4226 ASTIdentifierLookupTable *IdTable 4227 = (ASTIdentifierLookupTable *)Reader.Chain[Index]->IdentifierLookupTable; 4228 Current = IdTable->key_begin(); 4229 End = IdTable->key_end(); 4230 } 4231 4232 // We have any identifiers remaining in the current AST file; return 4233 // the next one. 4234 std::pair<const char*, unsigned> Key = *Current; 4235 ++Current; 4236 return llvm::StringRef(Key.first, Key.second); 4237} 4238 4239IdentifierIterator *ASTReader::getIdentifiers() const { 4240 return new ASTIdentifierIterator(*this); 4241} 4242 4243std::pair<ObjCMethodList, ObjCMethodList> 4244ASTReader::ReadMethodPool(Selector Sel) { 4245 // Find this selector in a hash table. We want to find the most recent entry. 4246 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4247 PerFileData &F = *Chain[I]; 4248 if (!F.SelectorLookupTable) 4249 continue; 4250 4251 ASTSelectorLookupTable *PoolTable 4252 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4253 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4254 if (Pos != PoolTable->end()) { 4255 ++NumSelectorsRead; 4256 // FIXME: Not quite happy with the statistics here. We probably should 4257 // disable this tracking when called via LoadSelector. 4258 // Also, should entries without methods count as misses? 4259 ++NumMethodPoolEntriesRead; 4260 ASTSelectorLookupTrait::data_type Data = *Pos; 4261 if (DeserializationListener) 4262 DeserializationListener->SelectorRead(Data.ID, Sel); 4263 return std::make_pair(Data.Instance, Data.Factory); 4264 } 4265 } 4266 4267 ++NumMethodPoolMisses; 4268 return std::pair<ObjCMethodList, ObjCMethodList>(); 4269} 4270 4271void ASTReader::LoadSelector(Selector Sel) { 4272 // It would be complicated to avoid reading the methods anyway. So don't. 4273 ReadMethodPool(Sel); 4274} 4275 4276void ASTReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) { 4277 assert(ID && "Non-zero identifier ID required"); 4278 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4279 IdentifiersLoaded[ID - 1] = II; 4280 if (DeserializationListener) 4281 DeserializationListener->IdentifierRead(ID, II); 4282} 4283 4284/// \brief Set the globally-visible declarations associated with the given 4285/// identifier. 4286/// 4287/// If the AST reader is currently in a state where the given declaration IDs 4288/// cannot safely be resolved, they are queued until it is safe to resolve 4289/// them. 4290/// 4291/// \param II an IdentifierInfo that refers to one or more globally-visible 4292/// declarations. 4293/// 4294/// \param DeclIDs the set of declaration IDs with the name @p II that are 4295/// visible at global scope. 4296/// 4297/// \param Nonrecursive should be true to indicate that the caller knows that 4298/// this call is non-recursive, and therefore the globally-visible declarations 4299/// will not be placed onto the pending queue. 4300void 4301ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4302 const llvm::SmallVectorImpl<uint32_t> &DeclIDs, 4303 bool Nonrecursive) { 4304 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4305 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4306 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4307 PII.II = II; 4308 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4309 return; 4310 } 4311 4312 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4313 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4314 if (SemaObj) { 4315 if (SemaObj->TUScope) { 4316 // Introduce this declaration into the translation-unit scope 4317 // and add it to the declaration chain for this identifier, so 4318 // that (unqualified) name lookup will find it. 4319 SemaObj->TUScope->AddDecl(D); 4320 } 4321 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4322 } else { 4323 // Queue this declaration so that it will be added to the 4324 // translation unit scope and identifier's declaration chain 4325 // once a Sema object is known. 4326 PreloadedDecls.push_back(D); 4327 } 4328 } 4329} 4330 4331IdentifierInfo *ASTReader::DecodeIdentifierInfo(unsigned ID) { 4332 if (ID == 0) 4333 return 0; 4334 4335 if (IdentifiersLoaded.empty()) { 4336 Error("no identifier table in AST file"); 4337 return 0; 4338 } 4339 4340 assert(PP && "Forgot to set Preprocessor ?"); 4341 ID -= 1; 4342 if (!IdentifiersLoaded[ID]) { 4343 unsigned Index = ID; 4344 const char *Str = 0; 4345 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4346 PerFileData *F = Chain[N - I - 1]; 4347 if (Index < F->LocalNumIdentifiers) { 4348 uint32_t Offset = F->IdentifierOffsets[Index]; 4349 Str = F->IdentifierTableData + Offset; 4350 break; 4351 } 4352 Index -= F->LocalNumIdentifiers; 4353 } 4354 assert(Str && "Broken Chain"); 4355 4356 // All of the strings in the AST file are preceded by a 16-bit length. 4357 // Extract that 16-bit length to avoid having to execute strlen(). 4358 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4359 // unsigned integers. This is important to avoid integer overflow when 4360 // we cast them to 'unsigned'. 4361 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4362 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4363 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4364 IdentifiersLoaded[ID] 4365 = &PP->getIdentifierTable().get(Str, StrLen); 4366 if (DeserializationListener) 4367 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4368 } 4369 4370 return IdentifiersLoaded[ID]; 4371} 4372 4373void ASTReader::ReadSLocEntry(unsigned ID) { 4374 ReadSLocEntryRecord(ID); 4375} 4376 4377Selector ASTReader::DecodeSelector(unsigned ID) { 4378 if (ID == 0) 4379 return Selector(); 4380 4381 if (ID > SelectorsLoaded.size()) { 4382 Error("selector ID out of range in AST file"); 4383 return Selector(); 4384 } 4385 4386 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4387 // Load this selector from the selector table. 4388 unsigned Idx = ID - 1; 4389 for (unsigned I = 0, N = Chain.size(); I != N; ++I) { 4390 PerFileData &F = *Chain[N - I - 1]; 4391 if (Idx < F.LocalNumSelectors) { 4392 ASTSelectorLookupTrait Trait(*this); 4393 SelectorsLoaded[ID - 1] = 4394 Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0); 4395 if (DeserializationListener) 4396 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4397 break; 4398 } 4399 Idx -= F.LocalNumSelectors; 4400 } 4401 } 4402 4403 return SelectorsLoaded[ID - 1]; 4404} 4405 4406Selector ASTReader::GetExternalSelector(uint32_t ID) { 4407 return DecodeSelector(ID); 4408} 4409 4410uint32_t ASTReader::GetNumExternalSelectors() { 4411 // ID 0 (the null selector) is considered an external selector. 4412 return getTotalNumSelectors() + 1; 4413} 4414 4415DeclarationName 4416ASTReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) { 4417 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4418 switch (Kind) { 4419 case DeclarationName::Identifier: 4420 return DeclarationName(GetIdentifierInfo(Record, Idx)); 4421 4422 case DeclarationName::ObjCZeroArgSelector: 4423 case DeclarationName::ObjCOneArgSelector: 4424 case DeclarationName::ObjCMultiArgSelector: 4425 return DeclarationName(GetSelector(Record, Idx)); 4426 4427 case DeclarationName::CXXConstructorName: 4428 return Context->DeclarationNames.getCXXConstructorName( 4429 Context->getCanonicalType(GetType(Record[Idx++]))); 4430 4431 case DeclarationName::CXXDestructorName: 4432 return Context->DeclarationNames.getCXXDestructorName( 4433 Context->getCanonicalType(GetType(Record[Idx++]))); 4434 4435 case DeclarationName::CXXConversionFunctionName: 4436 return Context->DeclarationNames.getCXXConversionFunctionName( 4437 Context->getCanonicalType(GetType(Record[Idx++]))); 4438 4439 case DeclarationName::CXXOperatorName: 4440 return Context->DeclarationNames.getCXXOperatorName( 4441 (OverloadedOperatorKind)Record[Idx++]); 4442 4443 case DeclarationName::CXXLiteralOperatorName: 4444 return Context->DeclarationNames.getCXXLiteralOperatorName( 4445 GetIdentifierInfo(Record, Idx)); 4446 4447 case DeclarationName::CXXUsingDirective: 4448 return DeclarationName::getUsingDirectiveName(); 4449 } 4450 4451 // Required to silence GCC warning 4452 return DeclarationName(); 4453} 4454 4455void ASTReader::ReadDeclarationNameLoc(PerFileData &F, 4456 DeclarationNameLoc &DNLoc, 4457 DeclarationName Name, 4458 const RecordData &Record, unsigned &Idx) { 4459 switch (Name.getNameKind()) { 4460 case DeclarationName::CXXConstructorName: 4461 case DeclarationName::CXXDestructorName: 4462 case DeclarationName::CXXConversionFunctionName: 4463 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4464 break; 4465 4466 case DeclarationName::CXXOperatorName: 4467 DNLoc.CXXOperatorName.BeginOpNameLoc 4468 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4469 DNLoc.CXXOperatorName.EndOpNameLoc 4470 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4471 break; 4472 4473 case DeclarationName::CXXLiteralOperatorName: 4474 DNLoc.CXXLiteralOperatorName.OpNameLoc 4475 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4476 break; 4477 4478 case DeclarationName::Identifier: 4479 case DeclarationName::ObjCZeroArgSelector: 4480 case DeclarationName::ObjCOneArgSelector: 4481 case DeclarationName::ObjCMultiArgSelector: 4482 case DeclarationName::CXXUsingDirective: 4483 break; 4484 } 4485} 4486 4487void ASTReader::ReadDeclarationNameInfo(PerFileData &F, 4488 DeclarationNameInfo &NameInfo, 4489 const RecordData &Record, unsigned &Idx) { 4490 NameInfo.setName(ReadDeclarationName(Record, Idx)); 4491 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4492 DeclarationNameLoc DNLoc; 4493 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4494 NameInfo.setInfo(DNLoc); 4495} 4496 4497void ASTReader::ReadQualifierInfo(PerFileData &F, QualifierInfo &Info, 4498 const RecordData &Record, unsigned &Idx) { 4499 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4500 unsigned NumTPLists = Record[Idx++]; 4501 Info.NumTemplParamLists = NumTPLists; 4502 if (NumTPLists) { 4503 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 4504 for (unsigned i=0; i != NumTPLists; ++i) 4505 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4506 } 4507} 4508 4509TemplateName 4510ASTReader::ReadTemplateName(PerFileData &F, const RecordData &Record, 4511 unsigned &Idx) { 4512 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 4513 switch (Kind) { 4514 case TemplateName::Template: 4515 return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++]))); 4516 4517 case TemplateName::OverloadedTemplate: { 4518 unsigned size = Record[Idx++]; 4519 UnresolvedSet<8> Decls; 4520 while (size--) 4521 Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4522 4523 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 4524 } 4525 4526 case TemplateName::QualifiedTemplate: { 4527 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4528 bool hasTemplKeyword = Record[Idx++]; 4529 TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++])); 4530 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 4531 } 4532 4533 case TemplateName::DependentTemplate: { 4534 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); 4535 if (Record[Idx++]) // isIdentifier 4536 return Context->getDependentTemplateName(NNS, 4537 GetIdentifierInfo(Record, Idx)); 4538 return Context->getDependentTemplateName(NNS, 4539 (OverloadedOperatorKind)Record[Idx++]); 4540 } 4541 4542 case TemplateName::SubstTemplateTemplateParmPack: { 4543 TemplateTemplateParmDecl *Param 4544 = cast_or_null<TemplateTemplateParmDecl>(GetDecl(Record[Idx++])); 4545 if (!Param) 4546 return TemplateName(); 4547 4548 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 4549 if (ArgPack.getKind() != TemplateArgument::Pack) 4550 return TemplateName(); 4551 4552 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 4553 } 4554 } 4555 4556 assert(0 && "Unhandled template name kind!"); 4557 return TemplateName(); 4558} 4559 4560TemplateArgument 4561ASTReader::ReadTemplateArgument(PerFileData &F, 4562 const RecordData &Record, unsigned &Idx) { 4563 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 4564 switch (Kind) { 4565 case TemplateArgument::Null: 4566 return TemplateArgument(); 4567 case TemplateArgument::Type: 4568 return TemplateArgument(GetType(Record[Idx++])); 4569 case TemplateArgument::Declaration: 4570 return TemplateArgument(GetDecl(Record[Idx++])); 4571 case TemplateArgument::Integral: { 4572 llvm::APSInt Value = ReadAPSInt(Record, Idx); 4573 QualType T = GetType(Record[Idx++]); 4574 return TemplateArgument(Value, T); 4575 } 4576 case TemplateArgument::Template: 4577 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 4578 case TemplateArgument::TemplateExpansion: { 4579 TemplateName Name = ReadTemplateName(F, Record, Idx); 4580 llvm::Optional<unsigned> NumTemplateExpansions; 4581 if (unsigned NumExpansions = Record[Idx++]) 4582 NumTemplateExpansions = NumExpansions - 1; 4583 return TemplateArgument(Name, NumTemplateExpansions); 4584 } 4585 case TemplateArgument::Expression: 4586 return TemplateArgument(ReadExpr(F)); 4587 case TemplateArgument::Pack: { 4588 unsigned NumArgs = Record[Idx++]; 4589 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 4590 for (unsigned I = 0; I != NumArgs; ++I) 4591 Args[I] = ReadTemplateArgument(F, Record, Idx); 4592 return TemplateArgument(Args, NumArgs); 4593 } 4594 } 4595 4596 assert(0 && "Unhandled template argument kind!"); 4597 return TemplateArgument(); 4598} 4599 4600TemplateParameterList * 4601ASTReader::ReadTemplateParameterList(PerFileData &F, 4602 const RecordData &Record, unsigned &Idx) { 4603 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 4604 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 4605 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 4606 4607 unsigned NumParams = Record[Idx++]; 4608 llvm::SmallVector<NamedDecl *, 16> Params; 4609 Params.reserve(NumParams); 4610 while (NumParams--) 4611 Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++]))); 4612 4613 TemplateParameterList* TemplateParams = 4614 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 4615 Params.data(), Params.size(), RAngleLoc); 4616 return TemplateParams; 4617} 4618 4619void 4620ASTReader:: 4621ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, 4622 PerFileData &F, const RecordData &Record, 4623 unsigned &Idx) { 4624 unsigned NumTemplateArgs = Record[Idx++]; 4625 TemplArgs.reserve(NumTemplateArgs); 4626 while (NumTemplateArgs--) 4627 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 4628} 4629 4630/// \brief Read a UnresolvedSet structure. 4631void ASTReader::ReadUnresolvedSet(UnresolvedSetImpl &Set, 4632 const RecordData &Record, unsigned &Idx) { 4633 unsigned NumDecls = Record[Idx++]; 4634 while (NumDecls--) { 4635 NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++])); 4636 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 4637 Set.addDecl(D, AS); 4638 } 4639} 4640 4641CXXBaseSpecifier 4642ASTReader::ReadCXXBaseSpecifier(PerFileData &F, 4643 const RecordData &Record, unsigned &Idx) { 4644 bool isVirtual = static_cast<bool>(Record[Idx++]); 4645 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 4646 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 4647 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 4648 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 4649 SourceRange Range = ReadSourceRange(F, Record, Idx); 4650 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 4651 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 4652 EllipsisLoc); 4653 Result.setInheritConstructors(inheritConstructors); 4654 return Result; 4655} 4656 4657std::pair<CXXCtorInitializer **, unsigned> 4658ASTReader::ReadCXXCtorInitializers(PerFileData &F, const RecordData &Record, 4659 unsigned &Idx) { 4660 CXXCtorInitializer **CtorInitializers = 0; 4661 unsigned NumInitializers = Record[Idx++]; 4662 if (NumInitializers) { 4663 ASTContext &C = *getContext(); 4664 4665 CtorInitializers 4666 = new (C) CXXCtorInitializer*[NumInitializers]; 4667 for (unsigned i=0; i != NumInitializers; ++i) { 4668 TypeSourceInfo *BaseClassInfo = 0; 4669 bool IsBaseVirtual = false; 4670 FieldDecl *Member = 0; 4671 IndirectFieldDecl *IndirectMember = 0; 4672 4673 bool IsBaseInitializer = Record[Idx++]; 4674 if (IsBaseInitializer) { 4675 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 4676 IsBaseVirtual = Record[Idx++]; 4677 } else { 4678 bool IsIndirectMemberInitializer = Record[Idx++]; 4679 if (IsIndirectMemberInitializer) 4680 IndirectMember = cast<IndirectFieldDecl>(GetDecl(Record[Idx++])); 4681 else 4682 Member = cast<FieldDecl>(GetDecl(Record[Idx++])); 4683 } 4684 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 4685 Expr *Init = ReadExpr(F); 4686 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 4687 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 4688 bool IsWritten = Record[Idx++]; 4689 unsigned SourceOrderOrNumArrayIndices; 4690 llvm::SmallVector<VarDecl *, 8> Indices; 4691 if (IsWritten) { 4692 SourceOrderOrNumArrayIndices = Record[Idx++]; 4693 } else { 4694 SourceOrderOrNumArrayIndices = Record[Idx++]; 4695 Indices.reserve(SourceOrderOrNumArrayIndices); 4696 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 4697 Indices.push_back(cast<VarDecl>(GetDecl(Record[Idx++]))); 4698 } 4699 4700 CXXCtorInitializer *BOMInit; 4701 if (IsBaseInitializer) { 4702 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 4703 LParenLoc, Init, RParenLoc, 4704 MemberOrEllipsisLoc); 4705 } else if (IsWritten) { 4706 if (Member) 4707 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 4708 LParenLoc, Init, RParenLoc); 4709 else 4710 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 4711 MemberOrEllipsisLoc, LParenLoc, 4712 Init, RParenLoc); 4713 } else { 4714 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 4715 LParenLoc, Init, RParenLoc, 4716 Indices.data(), Indices.size()); 4717 } 4718 4719 if (IsWritten) 4720 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 4721 CtorInitializers[i] = BOMInit; 4722 } 4723 } 4724 4725 return std::make_pair(CtorInitializers, NumInitializers); 4726} 4727 4728NestedNameSpecifier * 4729ASTReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) { 4730 unsigned N = Record[Idx++]; 4731 NestedNameSpecifier *NNS = 0, *Prev = 0; 4732 for (unsigned I = 0; I != N; ++I) { 4733 NestedNameSpecifier::SpecifierKind Kind 4734 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4735 switch (Kind) { 4736 case NestedNameSpecifier::Identifier: { 4737 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4738 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 4739 break; 4740 } 4741 4742 case NestedNameSpecifier::Namespace: { 4743 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4744 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 4745 break; 4746 } 4747 4748 case NestedNameSpecifier::NamespaceAlias: { 4749 NamespaceAliasDecl *Alias 4750 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4751 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 4752 break; 4753 } 4754 4755 case NestedNameSpecifier::TypeSpec: 4756 case NestedNameSpecifier::TypeSpecWithTemplate: { 4757 const Type *T = GetType(Record[Idx++]).getTypePtrOrNull(); 4758 if (!T) 4759 return 0; 4760 4761 bool Template = Record[Idx++]; 4762 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 4763 break; 4764 } 4765 4766 case NestedNameSpecifier::Global: { 4767 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 4768 // No associated value, and there can't be a prefix. 4769 break; 4770 } 4771 } 4772 Prev = NNS; 4773 } 4774 return NNS; 4775} 4776 4777NestedNameSpecifierLoc 4778ASTReader::ReadNestedNameSpecifierLoc(PerFileData &F, const RecordData &Record, 4779 unsigned &Idx) { 4780 unsigned N = Record[Idx++]; 4781 NestedNameSpecifierLocBuilder Builder; 4782 for (unsigned I = 0; I != N; ++I) { 4783 NestedNameSpecifier::SpecifierKind Kind 4784 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 4785 switch (Kind) { 4786 case NestedNameSpecifier::Identifier: { 4787 IdentifierInfo *II = GetIdentifierInfo(Record, Idx); 4788 SourceRange Range = ReadSourceRange(F, Record, Idx); 4789 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 4790 break; 4791 } 4792 4793 case NestedNameSpecifier::Namespace: { 4794 NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); 4795 SourceRange Range = ReadSourceRange(F, Record, Idx); 4796 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 4797 break; 4798 } 4799 4800 case NestedNameSpecifier::NamespaceAlias: { 4801 NamespaceAliasDecl *Alias 4802 = cast<NamespaceAliasDecl>(GetDecl(Record[Idx++])); 4803 SourceRange Range = ReadSourceRange(F, Record, Idx); 4804 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 4805 break; 4806 } 4807 4808 case NestedNameSpecifier::TypeSpec: 4809 case NestedNameSpecifier::TypeSpecWithTemplate: { 4810 bool Template = Record[Idx++]; 4811 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 4812 if (!T) 4813 return NestedNameSpecifierLoc(); 4814 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4815 4816 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 4817 Builder.Extend(*Context, 4818 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 4819 T->getTypeLoc(), ColonColonLoc); 4820 break; 4821 } 4822 4823 case NestedNameSpecifier::Global: { 4824 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 4825 Builder.MakeGlobal(*Context, ColonColonLoc); 4826 break; 4827 } 4828 } 4829 } 4830 4831 return Builder.getWithLocInContext(*Context); 4832} 4833 4834SourceRange 4835ASTReader::ReadSourceRange(PerFileData &F, const RecordData &Record, 4836 unsigned &Idx) { 4837 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 4838 SourceLocation end = ReadSourceLocation(F, Record, Idx); 4839 return SourceRange(beg, end); 4840} 4841 4842/// \brief Read an integral value 4843llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 4844 unsigned BitWidth = Record[Idx++]; 4845 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 4846 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 4847 Idx += NumWords; 4848 return Result; 4849} 4850 4851/// \brief Read a signed integral value 4852llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 4853 bool isUnsigned = Record[Idx++]; 4854 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 4855} 4856 4857/// \brief Read a floating-point value 4858llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 4859 return llvm::APFloat(ReadAPInt(Record, Idx)); 4860} 4861 4862// \brief Read a string 4863std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 4864 unsigned Len = Record[Idx++]; 4865 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 4866 Idx += Len; 4867 return Result; 4868} 4869 4870CXXTemporary *ASTReader::ReadCXXTemporary(const RecordData &Record, 4871 unsigned &Idx) { 4872 CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++])); 4873 return CXXTemporary::Create(*Context, Decl); 4874} 4875 4876DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 4877 return Diag(SourceLocation(), DiagID); 4878} 4879 4880DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 4881 return Diags.Report(Loc, DiagID); 4882} 4883 4884/// \brief Retrieve the identifier table associated with the 4885/// preprocessor. 4886IdentifierTable &ASTReader::getIdentifierTable() { 4887 assert(PP && "Forgot to set Preprocessor ?"); 4888 return PP->getIdentifierTable(); 4889} 4890 4891/// \brief Record that the given ID maps to the given switch-case 4892/// statement. 4893void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 4894 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 4895 SwitchCaseStmts[ID] = SC; 4896} 4897 4898/// \brief Retrieve the switch-case statement with the given ID. 4899SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 4900 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 4901 return SwitchCaseStmts[ID]; 4902} 4903 4904void ASTReader::ClearSwitchCaseIDs() { 4905 SwitchCaseStmts.clear(); 4906} 4907 4908void ASTReader::FinishedDeserializing() { 4909 assert(NumCurrentElementsDeserializing && 4910 "FinishedDeserializing not paired with StartedDeserializing"); 4911 if (NumCurrentElementsDeserializing == 1) { 4912 // If any identifiers with corresponding top-level declarations have 4913 // been loaded, load those declarations now. 4914 while (!PendingIdentifierInfos.empty()) { 4915 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 4916 PendingIdentifierInfos.front().DeclIDs, true); 4917 PendingIdentifierInfos.pop_front(); 4918 } 4919 4920 // Ready to load previous declarations of Decls that were delayed. 4921 while (!PendingPreviousDecls.empty()) { 4922 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 4923 PendingPreviousDecls.front().second); 4924 PendingPreviousDecls.pop_front(); 4925 } 4926 4927 // We are not in recursive loading, so it's safe to pass the "interesting" 4928 // decls to the consumer. 4929 if (Consumer) 4930 PassInterestingDeclsToConsumer(); 4931 4932 assert(PendingForwardRefs.size() == 0 && 4933 "Some forward refs did not get linked to the definition!"); 4934 } 4935 --NumCurrentElementsDeserializing; 4936} 4937 4938ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 4939 const char *isysroot, bool DisableValidation, 4940 bool DisableStatCache) 4941 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 4942 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 4943 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 4944 Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation), 4945 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4946 NumSLocEntriesRead(0), TotalNumSLocEntries(0), NextSLocOffset(0), 4947 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 4948 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 4949 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 4950 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 4951 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 4952 NumCurrentElementsDeserializing(0) 4953{ 4954 RelocatablePCH = false; 4955} 4956 4957ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 4958 Diagnostic &Diags, const char *isysroot, 4959 bool DisableValidation, bool DisableStatCache) 4960 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 4961 Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0), 4962 isysroot(isysroot), DisableValidation(DisableValidation), 4963 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 4964 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 4965 NextSLocOffset(0), NumStatementsRead(0), TotalNumStatements(0), 4966 NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0), 4967 NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 4968 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 4969 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 4970 TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) { 4971 RelocatablePCH = false; 4972} 4973 4974ASTReader::~ASTReader() { 4975 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 4976 delete Chain[e - i - 1]; 4977 // Delete all visible decl lookup tables 4978 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 4979 E = DeclContextOffsets.end(); 4980 I != E; ++I) { 4981 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 4982 J != F; ++J) { 4983 if (J->NameLookupTableData) 4984 delete static_cast<ASTDeclContextNameLookupTable*>( 4985 J->NameLookupTableData); 4986 } 4987 } 4988 for (DeclContextVisibleUpdatesPending::iterator 4989 I = PendingVisibleUpdates.begin(), 4990 E = PendingVisibleUpdates.end(); 4991 I != E; ++I) { 4992 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 4993 F = I->second.end(); 4994 J != F; ++J) 4995 delete static_cast<ASTDeclContextNameLookupTable*>(*J); 4996 } 4997} 4998 4999ASTReader::PerFileData::PerFileData(ASTFileType Ty) 5000 : Type(Ty), SizeInBits(0), LocalNumSLocEntries(0), SLocOffsets(0), LocalSLocSize(0), 5001 LocalNumIdentifiers(0), IdentifierOffsets(0), IdentifierTableData(0), 5002 IdentifierLookupTable(0), LocalNumMacroDefinitions(0), 5003 MacroDefinitionOffsets(0), 5004 LocalNumHeaderFileInfos(0), HeaderFileInfoTableData(0), 5005 HeaderFileInfoTable(0), 5006 LocalNumSelectors(0), SelectorOffsets(0), 5007 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 5008 DeclOffsets(0), LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 5009 LocalNumTypes(0), TypeOffsets(0), StatCache(0), 5010 NumPreallocatedPreprocessingEntities(0), NextInSource(0) 5011{} 5012 5013ASTReader::PerFileData::~PerFileData() { 5014 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5015 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5016 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5017} 5018